From 1897bdc4d33167e9036460631d1349e59d841f2d Mon Sep 17 00:00:00 2001 From: Joerg Roedel Date: Thu, 13 Nov 2014 13:46:09 +1100 Subject: mmu_notifier: add mmu_notifier_invalidate_range() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This notifier closes an important gap in the current mmu_notifier implementation, the existing callbacks are called too early or too late to reliably manage a non-CPU TLB. Specifically, invalidate_range_start() is called when all pages are still mapped and invalidate_range_end() when all pages are unmapped and potentially freed. This is fine when the users of the mmu_notifiers manage their own SoftTLB, like KVM does. When the TLB is managed in software it is easy to wipe out entries for a given range and prevent new entries to be established until invalidate_range_end is called. But when the user of mmu_notifiers has to manage a hardware TLB it can still wipe out TLB entries in invalidate_range_start, but it can't make sure that no new TLB entries in the given range are established between invalidate_range_start and invalidate_range_end. To avoid silent data corruption the entries in the non-CPU TLB need to be flushed when the pages are unmapped (at this point in time no _new_ TLB entries can be established in the non-CPU TLB) but not yet freed (as the non-CPU TLB may still have _existing_ entries pointing to the pages about to be freed). To fix this problem we need to catch the moment when the Linux VMM flushes remote TLBs (as a non-CPU TLB is not very CPU TLB), as this is the point in time when the pages are unmapped but _not_ yet freed. The mmu_notifier_invalidate_range() function aims to catch that moment. IOMMU code will be one user of the notifier-callback. Currently this is only the AMD IOMMUv2 driver, but its code is about to be more generalized and converted to a generic IOMMU-API extension to fit the needs of similar functionality in other IOMMUs as well. The current attempt in the AMD IOMMUv2 driver to work around the invalidate_range_start/end() shortcoming is to assign an empty page table to the non-CPU TLB between any invalidata_range_start/end calls. With the empty page-table assigned, every page-table walk to re-fill the non-CPU TLB will cause a page-fault reported to the IOMMU driver via an interrupt, possibly causing interrupt storms. The page-fault handler in the AMD IOMMUv2 driver doesn't handle the fault if an invalidate_range_start/end pair is active, it just reports back SUCCESS to the device and let it refault the page. But existing hardware (newer Radeon GPUs) that makes use of this feature don't re-fault indefinitly, after a certain number of faults for the same address the device enters a failure state and needs to be resetted. To avoid the GPUs entering a failure state we need to get rid of the empty-page-table workaround and use the mmu_notifier_invalidate_range() function introduced with this patch. Signed-off-by: Joerg Roedel Reviewed-by: Andrea Arcangeli Reviewed-by: Jérôme Glisse Cc: Peter Zijlstra Cc: Rik van Riel Cc: Hugh Dickins Cc: Mel Gorman Cc: Johannes Weiner Cc: Jay Cornwall Cc: Oded Gabbay Cc: Suravee Suthikulpanit Cc: Jesse Barnes Cc: David Woodhouse Signed-off-by: Andrew Morton Signed-off-by: Oded Gabbay --- include/linux/mmu_notifier.h | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'include/linux') diff --git a/include/linux/mmu_notifier.h b/include/linux/mmu_notifier.h index 88787bb4b3b9..17907908d1df 100644 --- a/include/linux/mmu_notifier.h +++ b/include/linux/mmu_notifier.h @@ -242,6 +242,11 @@ static inline void mmu_notifier_invalidate_range_end(struct mm_struct *mm, __mmu_notifier_invalidate_range_end(mm, start, end); } +static inline void mmu_notifier_invalidate_range(struct mm_struct *mm, + unsigned long start, unsigned long end) +{ +} + static inline void mmu_notifier_mm_init(struct mm_struct *mm) { mm->mmu_notifier_mm = NULL; @@ -342,6 +347,11 @@ static inline void mmu_notifier_invalidate_range_end(struct mm_struct *mm, { } +static inline void mmu_notifier_invalidate_range(struct mm_struct *mm, + unsigned long start, unsigned long end) +{ +} + static inline void mmu_notifier_mm_init(struct mm_struct *mm) { } -- cgit v1.2.3 From 34ee645e83b60ae3d5955f70ab9ab9a159136673 Mon Sep 17 00:00:00 2001 From: Joerg Roedel Date: Thu, 13 Nov 2014 13:46:09 +1100 Subject: mmu_notifier: call mmu_notifier_invalidate_range() from VMM MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Add calls to the new mmu_notifier_invalidate_range() function to all places in the VMM that need it. Signed-off-by: Joerg Roedel Reviewed-by: Andrea Arcangeli Reviewed-by: Jérôme Glisse Cc: Peter Zijlstra Cc: Rik van Riel Cc: Hugh Dickins Cc: Mel Gorman Cc: Johannes Weiner Cc: Jay Cornwall Cc: Oded Gabbay Cc: Suravee Suthikulpanit Cc: Jesse Barnes Cc: David Woodhouse Signed-off-by: Andrew Morton Signed-off-by: Oded Gabbay --- include/linux/mmu_notifier.h | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) (limited to 'include/linux') diff --git a/include/linux/mmu_notifier.h b/include/linux/mmu_notifier.h index 17907908d1df..966da2b4b803 100644 --- a/include/linux/mmu_notifier.h +++ b/include/linux/mmu_notifier.h @@ -284,6 +284,44 @@ static inline void mmu_notifier_mm_destroy(struct mm_struct *mm) __young; \ }) +#define ptep_clear_flush_notify(__vma, __address, __ptep) \ +({ \ + unsigned long ___addr = __address & PAGE_MASK; \ + struct mm_struct *___mm = (__vma)->vm_mm; \ + pte_t ___pte; \ + \ + ___pte = ptep_clear_flush(__vma, __address, __ptep); \ + mmu_notifier_invalidate_range(___mm, ___addr, \ + ___addr + PAGE_SIZE); \ + \ + ___pte; \ +}) + +#define pmdp_clear_flush_notify(__vma, __haddr, __pmd) \ +({ \ + unsigned long ___haddr = __haddr & HPAGE_PMD_MASK; \ + struct mm_struct *___mm = (__vma)->vm_mm; \ + pmd_t ___pmd; \ + \ + ___pmd = pmdp_clear_flush(__vma, __haddr, __pmd); \ + mmu_notifier_invalidate_range(___mm, ___haddr, \ + ___haddr + HPAGE_PMD_SIZE); \ + \ + ___pmd; \ +}) + +#define pmdp_get_and_clear_notify(__mm, __haddr, __pmd) \ +({ \ + unsigned long ___haddr = __haddr & HPAGE_PMD_MASK; \ + pmd_t ___pmd; \ + \ + ___pmd = pmdp_get_and_clear(__mm, __haddr, __pmd); \ + mmu_notifier_invalidate_range(__mm, ___haddr, \ + ___haddr + HPAGE_PMD_SIZE); \ + \ + ___pmd; \ +}) + /* * set_pte_at_notify() sets the pte _after_ running the notifier. * This is safe to start by updating the secondary MMUs, because the primary MMU @@ -362,6 +400,9 @@ static inline void mmu_notifier_mm_destroy(struct mm_struct *mm) #define ptep_clear_flush_young_notify ptep_clear_flush_young #define pmdp_clear_flush_young_notify pmdp_clear_flush_young +#define ptep_clear_flush_notify ptep_clear_flush +#define pmdp_clear_flush_notify pmdp_clear_flush +#define pmdp_get_and_clear_notify pmdp_get_and_clear #define set_pte_at_notify set_pte_at #endif /* CONFIG_MMU_NOTIFIER */ -- cgit v1.2.3 From 0f0a327fa12cd55de5e7f8c05a70ac3d047f405e Mon Sep 17 00:00:00 2001 From: Joerg Roedel Date: Thu, 13 Nov 2014 13:46:09 +1100 Subject: mmu_notifier: add the callback for mmu_notifier_invalidate_range() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Now that the mmu_notifier_invalidate_range() calls are in place, add the callback to allow subsystems to register against it. Signed-off-by: Joerg Roedel Reviewed-by: Andrea Arcangeli Reviewed-by: Jérôme Glisse Cc: Peter Zijlstra Cc: Rik van Riel Cc: Hugh Dickins Cc: Mel Gorman Cc: Johannes Weiner Cc: Jay Cornwall Cc: Oded Gabbay Cc: Suravee Suthikulpanit Cc: Jesse Barnes Cc: David Woodhouse Signed-off-by: Andrew Morton Signed-off-by: Oded Gabbay --- include/linux/mmu_notifier.h | 37 ++++++++++++++++++++++++++++++++----- 1 file changed, 32 insertions(+), 5 deletions(-) (limited to 'include/linux') diff --git a/include/linux/mmu_notifier.h b/include/linux/mmu_notifier.h index 966da2b4b803..94d19f64cecf 100644 --- a/include/linux/mmu_notifier.h +++ b/include/linux/mmu_notifier.h @@ -98,11 +98,11 @@ struct mmu_notifier_ops { /* * invalidate_range_start() and invalidate_range_end() must be * paired and are called only when the mmap_sem and/or the - * locks protecting the reverse maps are held. The subsystem - * must guarantee that no additional references are taken to - * the pages in the range established between the call to - * invalidate_range_start() and the matching call to - * invalidate_range_end(). + * locks protecting the reverse maps are held. If the subsystem + * can't guarantee that no additional references are taken to + * the pages in the range, it has to implement the + * invalidate_range() notifier to remove any references taken + * after invalidate_range_start(). * * Invalidation of multiple concurrent ranges may be * optionally permitted by the driver. Either way the @@ -144,6 +144,29 @@ struct mmu_notifier_ops { void (*invalidate_range_end)(struct mmu_notifier *mn, struct mm_struct *mm, unsigned long start, unsigned long end); + + /* + * invalidate_range() is either called between + * invalidate_range_start() and invalidate_range_end() when the + * VM has to free pages that where unmapped, but before the + * pages are actually freed, or outside of _start()/_end() when + * a (remote) TLB is necessary. + * + * If invalidate_range() is used to manage a non-CPU TLB with + * shared page-tables, it not necessary to implement the + * invalidate_range_start()/end() notifiers, as + * invalidate_range() alread catches the points in time when an + * external TLB range needs to be flushed. + * + * The invalidate_range() function is called under the ptl + * spin-lock and not allowed to sleep. + * + * Note that this function might be called with just a sub-range + * of what was passed to invalidate_range_start()/end(), if + * called between those functions. + */ + void (*invalidate_range)(struct mmu_notifier *mn, struct mm_struct *mm, + unsigned long start, unsigned long end); }; /* @@ -190,6 +213,8 @@ extern void __mmu_notifier_invalidate_range_start(struct mm_struct *mm, unsigned long start, unsigned long end); extern void __mmu_notifier_invalidate_range_end(struct mm_struct *mm, unsigned long start, unsigned long end); +extern void __mmu_notifier_invalidate_range(struct mm_struct *mm, + unsigned long start, unsigned long end); static inline void mmu_notifier_release(struct mm_struct *mm) { @@ -245,6 +270,8 @@ static inline void mmu_notifier_invalidate_range_end(struct mm_struct *mm, static inline void mmu_notifier_invalidate_range(struct mm_struct *mm, unsigned long start, unsigned long end) { + if (mm_has_notifiers(mm)) + __mmu_notifier_invalidate_range(mm, start, end); } static inline void mmu_notifier_mm_init(struct mm_struct *mm) -- cgit v1.2.3 From a7ee8839daf21c4a3ca439733e7bed25f32e7954 Mon Sep 17 00:00:00 2001 From: Denis CIOCCA Date: Fri, 3 Oct 2014 17:35:35 +0200 Subject: iio:imu: changed structure name from st_sensors to st_sensor_settings This patch change structure name and related variables names. Signed-off-by: Denis Ciocca Signed-off-by: Jonathan Cameron --- include/linux/iio/common/st_sensors.h | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'include/linux') diff --git a/include/linux/iio/common/st_sensors.h b/include/linux/iio/common/st_sensors.h index d8257ab60bac..2c476acb87d9 100644 --- a/include/linux/iio/common/st_sensors.h +++ b/include/linux/iio/common/st_sensors.h @@ -164,7 +164,7 @@ struct st_sensor_transfer_function { }; /** - * struct st_sensors - ST sensors list + * struct st_sensor_settings - ST specific sensor settings * @wai: Contents of WhoAmI register. * @sensors_supported: List of supported sensors by struct itself. * @ch: IIO channels for the sensor. @@ -177,7 +177,7 @@ struct st_sensor_transfer_function { * @multi_read_bit: Use or not particular bit for [I2C/SPI] multi-read. * @bootime: samples to discard when sensor passing from power-down to power-up. */ -struct st_sensors { +struct st_sensor_settings { u8 wai; char sensors_supported[ST_SENSORS_MAX_4WAI][ST_SENSORS_MAX_NAME]; struct iio_chan_spec *ch; @@ -196,7 +196,7 @@ struct st_sensors { * struct st_sensor_data - ST sensor device status * @dev: Pointer to instance of struct device (I2C or SPI). * @trig: The trigger in use by the core driver. - * @sensor: Pointer to the current sensor struct in use. + * @sensor_settings: Pointer to the specific sensor settings in use. * @current_fullscale: Maximum range of measure by the sensor. * @vdd: Pointer to sensor's Vdd power supply * @vdd_io: Pointer to sensor's Vdd-IO power supply @@ -213,7 +213,7 @@ struct st_sensors { struct st_sensor_data { struct device *dev; struct iio_trigger *trig; - struct st_sensors *sensor; + struct st_sensor_settings *sensor_settings; struct st_sensor_fullscale_avl *current_fullscale; struct regulator *vdd; struct regulator *vdd_io; @@ -279,7 +279,7 @@ int st_sensors_read_info_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *ch, int *val); int st_sensors_check_device_support(struct iio_dev *indio_dev, - int num_sensors_list, const struct st_sensors *sensors); + int num_sensors_list, const struct st_sensor_settings *sensor_settings); ssize_t st_sensors_sysfs_sampling_frequency_avail(struct device *dev, struct device_attribute *attr, char *buf); -- cgit v1.2.3 From e9a21949b79414dda42a017855b288901c07e613 Mon Sep 17 00:00:00 2001 From: Luciano Coelho Date: Wed, 8 Oct 2014 09:48:36 +0300 Subject: mac80211: add extended channel switching capability if the driver supports CSA The Extended Channel Switching capability bit in the extended capabilities element must be set if the driver supports CSA on non-beaconing interfaces. Since this capability needs to be set during driver registration, the extended_capabiliities global variable needs to be moved to the local structure so that it can be modified. Signed-off-by: Luciano Coelho Signed-off-by: Johannes Berg --- include/linux/ieee80211.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include/linux') diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h index b1be39c76931..5fab17b382b5 100644 --- a/include/linux/ieee80211.h +++ b/include/linux/ieee80211.h @@ -1998,6 +1998,11 @@ enum ieee80211_tdls_actioncode { WLAN_TDLS_DISCOVERY_REQUEST = 10, }; +/* Extended Channel Switching capability to be set in the 1st byte of + * the @WLAN_EID_EXT_CAPABILITY information element + */ +#define WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING BIT(2) + /* Interworking capabilities are set in 7th bit of 4th byte of the * @WLAN_EID_EXT_CAPABILITY information element */ -- cgit v1.2.3 From 34b48db66e08ca1c1bc07cf305d672ac940268dc Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Sat, 6 Sep 2014 16:08:05 -0700 Subject: block: remove artifical max_hw_sectors cap Set max_sectors to the value the drivers provides as hardware limit by default. Linux had proper I/O throttling for a long time and doesn't rely on a artifically small maximum I/O size anymore. By not limiting the I/O size by default we remove an annoying tuning step required for most Linux installation. Note that both the user, and if absolutely required the driver can still impose a limit for FS requests below max_hw_sectors_kb. Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe --- include/linux/blkdev.h | 1 - 1 file changed, 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 0207a78a8d82..74d14dba6fb7 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1186,7 +1186,6 @@ extern int blk_verify_command(unsigned char *cmd, fmode_t has_write_perm); enum blk_default_limits { BLK_MAX_SEGMENTS = 128, BLK_SAFE_MAX_SECTORS = 255, - BLK_DEF_MAX_SECTORS = 1024, BLK_MAX_SEGMENT_SIZE = 65536, BLK_SEG_BOUNDARY_MASK = 0xFFFFFFFFUL, }; -- cgit v1.2.3 From e66fcf722a74786c500957608f3230e843960b42 Mon Sep 17 00:00:00 2001 From: Ben Hutchings Date: Tue, 30 Sep 2014 03:15:04 +0100 Subject: spi-nor: Remove spi_nor::read_id operation There is currently no useful way to override the default implementation of this operation. The returned struct spi_device_id must have a pointer to struct flash_info in its private data, but this structure is defined inside spi-nor. Signed-off-by: Ben Hutchings Signed-off-by: Brian Norris --- include/linux/mtd/spi-nor.h | 3 --- 1 file changed, 3 deletions(-) (limited to 'include/linux') diff --git a/include/linux/mtd/spi-nor.h b/include/linux/mtd/spi-nor.h index 046a0a2e4c4e..2f27713b3ae1 100644 --- a/include/linux/mtd/spi-nor.h +++ b/include/linux/mtd/spi-nor.h @@ -139,8 +139,6 @@ enum spi_nor_ops { * @write_xfer: [OPTIONAL] the writefundamental primitive * @read_reg: [DRIVER-SPECIFIC] read out the register * @write_reg: [DRIVER-SPECIFIC] write data to the register - * @read_id: [REPLACEABLE] read out the ID data, and find - * the proper spi_device_id * @wait_till_ready: [REPLACEABLE] wait till the NOR becomes ready * @read: [DRIVER-SPECIFIC] read data from the SPI NOR * @write: [DRIVER-SPECIFIC] write data to the SPI NOR @@ -172,7 +170,6 @@ struct spi_nor { int (*read_reg)(struct spi_nor *nor, u8 opcode, u8 *buf, int len); int (*write_reg)(struct spi_nor *nor, u8 opcode, u8 *buf, int len, int write_enable); - const struct spi_device_id *(*read_id)(struct spi_nor *nor); int (*wait_till_ready)(struct spi_nor *nor); int (*read)(struct spi_nor *nor, loff_t from, -- cgit v1.2.3 From 6b358aedced8180830727258718c3916bef3e249 Mon Sep 17 00:00:00 2001 From: Sebastian Hesselbarth Date: Wed, 22 Oct 2014 20:26:44 +0200 Subject: phy: marvell: Add support for 88E3016 FastEthernet PHY MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Marvell 88E3016 is a FastEthernet PHY that also can be found in Marvell Berlin SoCs as integrated PHY. Tested-by: Antoine Ténart Reviewed-by: Florian Fainelli Signed-off-by: Sebastian Hesselbarth Signed-off-by: David S. Miller --- include/linux/marvell_phy.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/marvell_phy.h b/include/linux/marvell_phy.h index 8e9a029e093d..e6982ac3200d 100644 --- a/include/linux/marvell_phy.h +++ b/include/linux/marvell_phy.h @@ -16,6 +16,7 @@ #define MARVELL_PHY_ID_88E1318S 0x01410e90 #define MARVELL_PHY_ID_88E1116R 0x01410e40 #define MARVELL_PHY_ID_88E1510 0x01410dd0 +#define MARVELL_PHY_ID_88E3016 0x01410e60 /* struct phy_device dev_flags definitions */ #define MARVELL_PHY_M1145_FLAGS_RESISTANCE 0x00000001 -- cgit v1.2.3 From e7de17abeda24d8acc316b2e07bd969d03099eea Mon Sep 17 00:00:00 2001 From: Sebastian Hesselbarth Date: Wed, 22 Oct 2014 20:26:45 +0200 Subject: net: pxa168_eth: Provide phy_interface mode on platform_data MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The PXA168 Ethernet IP support MII and RMII connection to its PHY. Currently, pxa168 platform_data does not provide a way to pass that and there is one user of pxa168 platform_data (mach-mmp/gplug). Given the pinctrl settings of gplug it uses RMII, so add and pass a corresponding phy_interface_t. Tested-by: Antoine Ténart Reviewed-by: Florian Fainelli Signed-off-by: Sebastian Hesselbarth Signed-off-by: David S. Miller --- include/linux/pxa168_eth.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/pxa168_eth.h b/include/linux/pxa168_eth.h index 18d75e795606..37c381120bc8 100644 --- a/include/linux/pxa168_eth.h +++ b/include/linux/pxa168_eth.h @@ -13,6 +13,7 @@ struct pxa168_eth_platform_data { */ int speed; /* 0, SPEED_10, SPEED_100 */ int duplex; /* DUPLEX_HALF or DUPLEX_FULL */ + phy_interface_t intf; /* * Override default RX/TX queue sizes if nonzero. -- cgit v1.2.3 From b3020f0a35fc431f7acf3fba9a5b7376d79932e5 Mon Sep 17 00:00:00 2001 From: Alexander Aring Date: Sat, 25 Oct 2014 05:25:07 +0200 Subject: ieee802154: mac802154: remove FSF address This patch removes the FSF address in files which belongs to ieee802154 and mac802154. Signed-off-by: Alexander Aring Cc: Alan Ott Signed-off-by: Marcel Holtmann --- include/linux/nl802154.h | 4 ---- 1 file changed, 4 deletions(-) (limited to 'include/linux') diff --git a/include/linux/nl802154.h b/include/linux/nl802154.h index 20163b9a0eae..167342c2ce6b 100644 --- a/include/linux/nl802154.h +++ b/include/linux/nl802154.h @@ -12,10 +12,6 @@ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - * */ #ifndef NL802154_H -- cgit v1.2.3 From acd8256723f286b7217801fbed24503f8565b91e Mon Sep 17 00:00:00 2001 From: "Ivan T. Ivanov" Date: Wed, 22 Oct 2014 18:29:43 +0300 Subject: iio: inkern: Add of_xlate function to struct iio_info When #iio-cells is greater than '0', the driver could provide a custom of_xlate function that reads the *args* and returns the appropriate index in registered IIO channels array. Add simple translation function, suitable for the most 1:1 mapped channels in IIO chips, and use it when driver did not provide custom implementation. Signed-off-by: Ivan T. Ivanov Reviewed-by: Lars-Peter Clausen Signed-off-by: Jonathan Cameron --- include/linux/iio/iio.h | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'include/linux') diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h index 15dc6bc2bdd2..3642ce7ef512 100644 --- a/include/linux/iio/iio.h +++ b/include/linux/iio/iio.h @@ -13,6 +13,7 @@ #include #include #include +#include /* IIO TODO LIST */ /* * Provide means of adjusting timer accuracy. @@ -326,6 +327,11 @@ struct iio_dev; * @update_scan_mode: function to configure device and scan buffer when * channels have changed * @debugfs_reg_access: function to read or write register value of device + * @of_xlate: function pointer to obtain channel specifier index. + * When #iio-cells is greater than '0', the driver could + * provide a custom of_xlate function that reads the + * *args* and returns the appropriate index in registered + * IIO channels array. **/ struct iio_info { struct module *driver_module; @@ -385,6 +391,8 @@ struct iio_info { int (*debugfs_reg_access)(struct iio_dev *indio_dev, unsigned reg, unsigned writeval, unsigned *readval); + int (*of_xlate)(struct iio_dev *indio_dev, + const struct of_phandle_args *iiospec); }; /** -- cgit v1.2.3 From 4ca24aca55fe1e2a61f3ffaac9015d9c45204729 Mon Sep 17 00:00:00 2001 From: Alexander Aring Date: Sat, 25 Oct 2014 09:41:04 +0200 Subject: ieee802154: move ieee802154 header This patch moves the ieee802154 header into include/linux instead include/net. Similar like wireless which have the ieee80211 header inside of include/linux. Signed-off-by: Alexander Aring Cc: Alan Ott Signed-off-by: Marcel Holtmann --- include/linux/ieee802154.h | 189 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 189 insertions(+) create mode 100644 include/linux/ieee802154.h (limited to 'include/linux') diff --git a/include/linux/ieee802154.h b/include/linux/ieee802154.h new file mode 100644 index 000000000000..2dfab2db103a --- /dev/null +++ b/include/linux/ieee802154.h @@ -0,0 +1,189 @@ +/* + * IEEE802.15.4-2003 specification + * + * Copyright (C) 2007, 2008 Siemens AG + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * Written by: + * Pavel Smolenskiy + * Maxim Gorbachyov + * Maxim Osipov + * Dmitry Eremin-Solenikov + * Alexander Smirnov + */ + +#ifndef LINUX_IEEE802154_H +#define LINUX_IEEE802154_H + +#define IEEE802154_MTU 127 + +#define IEEE802154_FC_TYPE_BEACON 0x0 /* Frame is beacon */ +#define IEEE802154_FC_TYPE_DATA 0x1 /* Frame is data */ +#define IEEE802154_FC_TYPE_ACK 0x2 /* Frame is acknowledgment */ +#define IEEE802154_FC_TYPE_MAC_CMD 0x3 /* Frame is MAC command */ + +#define IEEE802154_FC_TYPE_SHIFT 0 +#define IEEE802154_FC_TYPE_MASK ((1 << 3) - 1) +#define IEEE802154_FC_TYPE(x) ((x & IEEE802154_FC_TYPE_MASK) >> IEEE802154_FC_TYPE_SHIFT) +#define IEEE802154_FC_SET_TYPE(v, x) do { \ + v = (((v) & ~IEEE802154_FC_TYPE_MASK) | \ + (((x) << IEEE802154_FC_TYPE_SHIFT) & IEEE802154_FC_TYPE_MASK)); \ + } while (0) + +#define IEEE802154_FC_SECEN_SHIFT 3 +#define IEEE802154_FC_SECEN (1 << IEEE802154_FC_SECEN_SHIFT) +#define IEEE802154_FC_FRPEND_SHIFT 4 +#define IEEE802154_FC_FRPEND (1 << IEEE802154_FC_FRPEND_SHIFT) +#define IEEE802154_FC_ACK_REQ_SHIFT 5 +#define IEEE802154_FC_ACK_REQ (1 << IEEE802154_FC_ACK_REQ_SHIFT) +#define IEEE802154_FC_INTRA_PAN_SHIFT 6 +#define IEEE802154_FC_INTRA_PAN (1 << IEEE802154_FC_INTRA_PAN_SHIFT) + +#define IEEE802154_FC_SAMODE_SHIFT 14 +#define IEEE802154_FC_SAMODE_MASK (3 << IEEE802154_FC_SAMODE_SHIFT) +#define IEEE802154_FC_DAMODE_SHIFT 10 +#define IEEE802154_FC_DAMODE_MASK (3 << IEEE802154_FC_DAMODE_SHIFT) + +#define IEEE802154_FC_VERSION_SHIFT 12 +#define IEEE802154_FC_VERSION_MASK (3 << IEEE802154_FC_VERSION_SHIFT) +#define IEEE802154_FC_VERSION(x) ((x & IEEE802154_FC_VERSION_MASK) >> IEEE802154_FC_VERSION_SHIFT) + +#define IEEE802154_FC_SAMODE(x) \ + (((x) & IEEE802154_FC_SAMODE_MASK) >> IEEE802154_FC_SAMODE_SHIFT) + +#define IEEE802154_FC_DAMODE(x) \ + (((x) & IEEE802154_FC_DAMODE_MASK) >> IEEE802154_FC_DAMODE_SHIFT) + +#define IEEE802154_SCF_SECLEVEL_MASK 7 +#define IEEE802154_SCF_SECLEVEL_SHIFT 0 +#define IEEE802154_SCF_SECLEVEL(x) (x & IEEE802154_SCF_SECLEVEL_MASK) +#define IEEE802154_SCF_KEY_ID_MODE_SHIFT 3 +#define IEEE802154_SCF_KEY_ID_MODE_MASK (3 << IEEE802154_SCF_KEY_ID_MODE_SHIFT) +#define IEEE802154_SCF_KEY_ID_MODE(x) \ + ((x & IEEE802154_SCF_KEY_ID_MODE_MASK) >> IEEE802154_SCF_KEY_ID_MODE_SHIFT) + +#define IEEE802154_SCF_KEY_IMPLICIT 0 +#define IEEE802154_SCF_KEY_INDEX 1 +#define IEEE802154_SCF_KEY_SHORT_INDEX 2 +#define IEEE802154_SCF_KEY_HW_INDEX 3 + +#define IEEE802154_SCF_SECLEVEL_NONE 0 +#define IEEE802154_SCF_SECLEVEL_MIC32 1 +#define IEEE802154_SCF_SECLEVEL_MIC64 2 +#define IEEE802154_SCF_SECLEVEL_MIC128 3 +#define IEEE802154_SCF_SECLEVEL_ENC 4 +#define IEEE802154_SCF_SECLEVEL_ENC_MIC32 5 +#define IEEE802154_SCF_SECLEVEL_ENC_MIC64 6 +#define IEEE802154_SCF_SECLEVEL_ENC_MIC128 7 + +/* MAC footer size */ +#define IEEE802154_MFR_SIZE 2 /* 2 octets */ + +/* MAC's Command Frames Identifiers */ +#define IEEE802154_CMD_ASSOCIATION_REQ 0x01 +#define IEEE802154_CMD_ASSOCIATION_RESP 0x02 +#define IEEE802154_CMD_DISASSOCIATION_NOTIFY 0x03 +#define IEEE802154_CMD_DATA_REQ 0x04 +#define IEEE802154_CMD_PANID_CONFLICT_NOTIFY 0x05 +#define IEEE802154_CMD_ORPHAN_NOTIFY 0x06 +#define IEEE802154_CMD_BEACON_REQ 0x07 +#define IEEE802154_CMD_COORD_REALIGN_NOTIFY 0x08 +#define IEEE802154_CMD_GTS_REQ 0x09 + +/* + * The return values of MAC operations + */ +enum { + /* + * The requested operation was completed successfully. + * For a transmission request, this value indicates + * a successful transmission. + */ + IEEE802154_SUCCESS = 0x0, + + /* The beacon was lost following a synchronization request. */ + IEEE802154_BEACON_LOSS = 0xe0, + /* + * A transmission could not take place due to activity on the + * channel, i.e., the CSMA-CA mechanism has failed. + */ + IEEE802154_CHNL_ACCESS_FAIL = 0xe1, + /* The GTS request has been denied by the PAN coordinator. */ + IEEE802154_DENINED = 0xe2, + /* The attempt to disable the transceiver has failed. */ + IEEE802154_DISABLE_TRX_FAIL = 0xe3, + /* + * The received frame induces a failed security check according to + * the security suite. + */ + IEEE802154_FAILED_SECURITY_CHECK = 0xe4, + /* + * The frame resulting from secure processing has a length that is + * greater than aMACMaxFrameSize. + */ + IEEE802154_FRAME_TOO_LONG = 0xe5, + /* + * The requested GTS transmission failed because the specified GTS + * either did not have a transmit GTS direction or was not defined. + */ + IEEE802154_INVALID_GTS = 0xe6, + /* + * A request to purge an MSDU from the transaction queue was made using + * an MSDU handle that was not found in the transaction table. + */ + IEEE802154_INVALID_HANDLE = 0xe7, + /* A parameter in the primitive is out of the valid range.*/ + IEEE802154_INVALID_PARAMETER = 0xe8, + /* No acknowledgment was received after aMaxFrameRetries. */ + IEEE802154_NO_ACK = 0xe9, + /* A scan operation failed to find any network beacons.*/ + IEEE802154_NO_BEACON = 0xea, + /* No response data were available following a request. */ + IEEE802154_NO_DATA = 0xeb, + /* The operation failed because a short address was not allocated. */ + IEEE802154_NO_SHORT_ADDRESS = 0xec, + /* + * A receiver enable request was unsuccessful because it could not be + * completed within the CAP. + */ + IEEE802154_OUT_OF_CAP = 0xed, + /* + * A PAN identifier conflict has been detected and communicated to the + * PAN coordinator. + */ + IEEE802154_PANID_CONFLICT = 0xee, + /* A coordinator realignment command has been received. */ + IEEE802154_REALIGMENT = 0xef, + /* The transaction has expired and its information discarded. */ + IEEE802154_TRANSACTION_EXPIRED = 0xf0, + /* There is no capacity to store the transaction. */ + IEEE802154_TRANSACTION_OVERFLOW = 0xf1, + /* + * The transceiver was in the transmitter enabled state when the + * receiver was requested to be enabled. + */ + IEEE802154_TX_ACTIVE = 0xf2, + /* The appropriate key is not available in the ACL. */ + IEEE802154_UNAVAILABLE_KEY = 0xf3, + /* + * A SET/GET request was issued with the identifier of a PIB attribute + * that is not supported. + */ + IEEE802154_UNSUPPORTED_ATTR = 0xf4, + /* + * A request to perform a scan operation failed because the MLME was + * in the process of performing a previously initiated scan operation. + */ + IEEE802154_SCAN_IN_PROGRESS = 0xfc, +}; + + +#endif /* LINUX_IEEE802154_H */ -- cgit v1.2.3 From 593befa6ab74a805e4f503c8c737c3cffa8066b6 Mon Sep 17 00:00:00 2001 From: Dominik Dingel Date: Thu, 23 Oct 2014 12:07:44 +0200 Subject: mm: introduce mm_forbids_zeropage function Add a new function stub to allow architectures to disable for an mm_structthe backing of non-present, anonymous pages with read-only empty zero pages. Signed-off-by: Dominik Dingel Reviewed-by: Paolo Bonzini Signed-off-by: Martin Schwidefsky --- include/linux/mm.h | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'include/linux') diff --git a/include/linux/mm.h b/include/linux/mm.h index 27eb1bfbe704..ab7dadca4ea5 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -56,6 +56,17 @@ extern int sysctl_legacy_va_layout; #define __pa_symbol(x) __pa(RELOC_HIDE((unsigned long)(x), 0)) #endif +/* + * To prevent common memory management code establishing + * a zero page mapping on a read fault. + * This macro should be defined within . + * s390 does this to prevent multiplexing of hardware bits + * related to the physical page in case of virtualization. + */ +#ifndef mm_forbids_zeropage +#define mm_forbids_zeropage(X) (0) +#endif + extern unsigned long sysctl_user_reserve_kbytes; extern unsigned long sysctl_admin_reserve_kbytes; -- cgit v1.2.3 From f7f242ff004499e0904d3664713dfba01f24c408 Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Wed, 15 Oct 2014 12:17:34 +0200 Subject: kprobes: introduce weak arch_check_ftrace_location() helper function Introduce weak arch_check_ftrace_location() helper function which architectures can override in order to implement handling of kprobes on function tracer call sites on their own, without depending on common code or implementing the KPROBES_ON_FTRACE feature. Signed-off-by: Heiko Carstens Acked-by: Masami Hiramatsu Acked-by: Steven Rostedt Signed-off-by: Martin Schwidefsky --- include/linux/kprobes.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/kprobes.h b/include/linux/kprobes.h index f7296e57d614..5297f9fa0ef2 100644 --- a/include/linux/kprobes.h +++ b/include/linux/kprobes.h @@ -335,6 +335,7 @@ extern void kprobe_ftrace_handler(unsigned long ip, unsigned long parent_ip, extern int arch_prepare_kprobe_ftrace(struct kprobe *p); #endif +int arch_check_ftrace_location(struct kprobe *p); /* Get the kprobe at this addr (if any) - called with preemption disabled */ struct kprobe *get_kprobe(void *addr); -- cgit v1.2.3 From 344736f29b359790facd0b7a521e367f1715c11c Mon Sep 17 00:00:00 2001 From: Vladimir Davydov Date: Mon, 20 Oct 2014 15:50:30 +0400 Subject: cpuset: simplify cpuset_node_allowed API Current cpuset API for checking if a zone/node is allowed to allocate from looks rather awkward. We have hardwall and softwall versions of cpuset_node_allowed with the softwall version doing literally the same as the hardwall version if __GFP_HARDWALL is passed to it in gfp flags. If it isn't, the softwall version may check the given node against the enclosing hardwall cpuset, which it needs to take the callback lock to do. Such a distinction was introduced by commit 02a0e53d8227 ("cpuset: rework cpuset_zone_allowed api"). Before, we had the only version with the __GFP_HARDWALL flag determining its behavior. The purpose of the commit was to avoid sleep-in-atomic bugs when someone would mistakenly call the function without the __GFP_HARDWALL flag for an atomic allocation. The suffixes introduced were intended to make the callers think before using the function. However, since the callback lock was converted from mutex to spinlock by the previous patch, the softwall check function cannot sleep, and these precautions are no longer necessary. So let's simplify the API back to the single check. Suggested-by: David Rientjes Signed-off-by: Vladimir Davydov Acked-by: Christoph Lameter Acked-by: Zefan Li Signed-off-by: Tejun Heo --- include/linux/cpuset.h | 37 +++++++------------------------------ 1 file changed, 7 insertions(+), 30 deletions(-) (limited to 'include/linux') diff --git a/include/linux/cpuset.h b/include/linux/cpuset.h index 2f073db7392e..1b357997cac5 100644 --- a/include/linux/cpuset.h +++ b/include/linux/cpuset.h @@ -48,29 +48,16 @@ extern nodemask_t cpuset_mems_allowed(struct task_struct *p); void cpuset_init_current_mems_allowed(void); int cpuset_nodemask_valid_mems_allowed(nodemask_t *nodemask); -extern int __cpuset_node_allowed_softwall(int node, gfp_t gfp_mask); -extern int __cpuset_node_allowed_hardwall(int node, gfp_t gfp_mask); +extern int __cpuset_node_allowed(int node, gfp_t gfp_mask); -static inline int cpuset_node_allowed_softwall(int node, gfp_t gfp_mask) +static inline int cpuset_node_allowed(int node, gfp_t gfp_mask) { - return nr_cpusets() <= 1 || - __cpuset_node_allowed_softwall(node, gfp_mask); + return nr_cpusets() <= 1 || __cpuset_node_allowed(node, gfp_mask); } -static inline int cpuset_node_allowed_hardwall(int node, gfp_t gfp_mask) +static inline int cpuset_zone_allowed(struct zone *z, gfp_t gfp_mask) { - return nr_cpusets() <= 1 || - __cpuset_node_allowed_hardwall(node, gfp_mask); -} - -static inline int cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask) -{ - return cpuset_node_allowed_softwall(zone_to_nid(z), gfp_mask); -} - -static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask) -{ - return cpuset_node_allowed_hardwall(zone_to_nid(z), gfp_mask); + return cpuset_node_allowed(zone_to_nid(z), gfp_mask); } extern int cpuset_mems_allowed_intersects(const struct task_struct *tsk1, @@ -179,22 +166,12 @@ static inline int cpuset_nodemask_valid_mems_allowed(nodemask_t *nodemask) return 1; } -static inline int cpuset_node_allowed_softwall(int node, gfp_t gfp_mask) -{ - return 1; -} - -static inline int cpuset_node_allowed_hardwall(int node, gfp_t gfp_mask) -{ - return 1; -} - -static inline int cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask) +static inline int cpuset_node_allowed(int node, gfp_t gfp_mask) { return 1; } -static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask) +static inline int cpuset_zone_allowed(struct zone *z, gfp_t gfp_mask) { return 1; } -- cgit v1.2.3 From fa491001e4edae5ed68a562b61ed729968a3ca1c Mon Sep 17 00:00:00 2001 From: Alexander Aring Date: Mon, 27 Oct 2014 17:13:40 +0100 Subject: ieee802154: add valid psdu length helper This patch adds a generic valid psdu length check function helper. This is useful to check the length field after receiving. For example the at86rf231 doesn't filter invalid psdu length. Sometimes the CRC can also be correct. If we get the lqi value with an invalid frame length the kernel may crash because we dereference an invalid pointer in the receive buffer. Signed-off-by: Alexander Aring Signed-off-by: Marcel Holtmann --- include/linux/ieee802154.h | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'include/linux') diff --git a/include/linux/ieee802154.h b/include/linux/ieee802154.h index 2dfab2db103a..6e50a2a1d485 100644 --- a/include/linux/ieee802154.h +++ b/include/linux/ieee802154.h @@ -23,7 +23,10 @@ #ifndef LINUX_IEEE802154_H #define LINUX_IEEE802154_H +#include + #define IEEE802154_MTU 127 +#define IEEE802154_MIN_PSDU_LEN 5 #define IEEE802154_FC_TYPE_BEACON 0x0 /* Frame is beacon */ #define IEEE802154_FC_TYPE_DATA 0x1 /* Frame is data */ @@ -185,5 +188,13 @@ enum { IEEE802154_SCAN_IN_PROGRESS = 0xfc, }; +/** + * ieee802154_is_valid_psdu_len - check if psdu len is valid + * @len: psdu len with (MHR + payload + MFR) + */ +static inline bool ieee802154_is_valid_psdu_len(const u8 len) +{ + return (len >= IEEE802154_MIN_PSDU_LEN && len <= IEEE802154_MTU); +} #endif /* LINUX_IEEE802154_H */ -- cgit v1.2.3 From a59dadbeeaf7d33f2e92dbf5a290965d6df64162 Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Sat, 25 Oct 2014 17:19:33 +0200 Subject: ath9k: add support for endian swap of eeprom from platform data On some devices (especially little-endian ones), the flash EEPROM data has a different endian, which needs to be detected. Add a flag to the platform data to allow overriding that behavior Signed-off-by: Felix Fietkau Signed-off-by: John W. Linville --- include/linux/ath9k_platform.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/ath9k_platform.h b/include/linux/ath9k_platform.h index a495a959e8a7..43501657bce9 100644 --- a/include/linux/ath9k_platform.h +++ b/include/linux/ath9k_platform.h @@ -31,6 +31,7 @@ struct ath9k_platform_data { u32 gpio_mask; u32 gpio_val; + bool endian_check; bool is_clk_25mhz; bool tx_gain_buffalo; -- cgit v1.2.3 From 3468968ef766d7bb4ab29c0ef7ebd169a4ac2e96 Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Sat, 25 Oct 2014 17:19:34 +0200 Subject: ath9k: allow disabling bands via platform data Some devices have multiple bands enables in the EEPROM data, even though they are only calibrated for one. Allow platform data to disable unsupported bands. Signed-off-by: Gabor Juhos Signed-off-by: Felix Fietkau Signed-off-by: John W. Linville --- include/linux/ath9k_platform.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/linux') diff --git a/include/linux/ath9k_platform.h b/include/linux/ath9k_platform.h index 43501657bce9..33eb274cd0e6 100644 --- a/include/linux/ath9k_platform.h +++ b/include/linux/ath9k_platform.h @@ -34,6 +34,8 @@ struct ath9k_platform_data { bool endian_check; bool is_clk_25mhz; bool tx_gain_buffalo; + bool disable_2ghz; + bool disable_5ghz; int (*get_mac_revision)(void); int (*external_reset)(void); -- cgit v1.2.3 From 7f51412a415d87ea8598d14722fb31e4f5701257 Mon Sep 17 00:00:00 2001 From: Juri Lelli Date: Fri, 19 Sep 2014 10:22:40 +0100 Subject: sched/deadline: Fix bandwidth check/update when migrating tasks between exclusive cpusets Exclusive cpusets are the only way users can restrict SCHED_DEADLINE tasks affinity (performing what is commonly called clustered scheduling). Unfortunately, such thing is currently broken for two reasons: - No check is performed when the user tries to attach a task to an exlusive cpuset (recall that exclusive cpusets have an associated maximum allowed bandwidth). - Bandwidths of source and destination cpusets are not correctly updated after a task is migrated between them. This patch fixes both things at once, as they are opposite faces of the same coin. The check is performed in cpuset_can_attach(), as there aren't any points of failure after that function. The updated is split in two halves. We first reserve bandwidth in the destination cpuset, after we pass the check in cpuset_can_attach(). And we then release bandwidth from the source cpuset when the task's affinity is actually changed. Even if there can be time windows when sched_setattr() may erroneously fail in the source cpuset, we are fine with it, as we can't perfom an atomic update of both cpusets at once. Reported-by: Daniel Wagner Reported-by: Vincent Legout Signed-off-by: Juri Lelli Signed-off-by: Peter Zijlstra (Intel) Cc: Dario Faggioli Cc: Michael Trimarchi Cc: Fabio Checconi Cc: michael@amarulasolutions.com Cc: luca.abeni@unitn.it Cc: Li Zefan Cc: Linus Torvalds Cc: cgroups@vger.kernel.org Link: http://lkml.kernel.org/r/1411118561-26323-3-git-send-email-juri.lelli@arm.com Signed-off-by: Ingo Molnar --- include/linux/sched.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/linux') diff --git a/include/linux/sched.h b/include/linux/sched.h index 5e344bbe63ec..1d1fa081d44f 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -2052,6 +2052,8 @@ static inline void tsk_restore_flags(struct task_struct *task, task->flags |= orig_flags & flags; } +extern int task_can_attach(struct task_struct *p, + const struct cpumask *cs_cpus_allowed); #ifdef CONFIG_SMP extern void do_set_cpus_allowed(struct task_struct *p, const struct cpumask *new_mask); -- cgit v1.2.3 From f82f80426f7afcf55953924e71555984a4bd6ce6 Mon Sep 17 00:00:00 2001 From: Juri Lelli Date: Tue, 7 Oct 2014 09:52:11 +0100 Subject: sched/deadline: Ensure that updates to exclusive cpusets don't break AC How we deal with updates to exclusive cpusets is currently broken. As an example, suppose we have an exclusive cpuset composed of two cpus: A[cpu0,cpu1]. We can assign SCHED_DEADLINE task to it up to the allowed bandwidth. If we want now to modify cpusetA's cpumask, we have to check that removing a cpu's amount of bandwidth doesn't break AC guarantees. This thing isn't checked in the current code. This patch fixes the problem above, denying an update if the new cpumask won't have enough bandwidth for SCHED_DEADLINE tasks that are currently active. Signed-off-by: Juri Lelli Signed-off-by: Peter Zijlstra (Intel) Cc: Linus Torvalds Cc: Li Zefan Cc: cgroups@vger.kernel.org Link: http://lkml.kernel.org/r/5433E6AF.5080105@arm.com Signed-off-by: Ingo Molnar --- include/linux/sched.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/linux') diff --git a/include/linux/sched.h b/include/linux/sched.h index 1d1fa081d44f..320a9779f1b4 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -2052,6 +2052,8 @@ static inline void tsk_restore_flags(struct task_struct *task, task->flags |= orig_flags & flags; } +extern int cpuset_cpumask_can_shrink(const struct cpumask *cur, + const struct cpumask *trial); extern int task_can_attach(struct task_struct *p, const struct cpumask *cs_cpus_allowed); #ifdef CONFIG_SMP -- cgit v1.2.3 From 61ada528dea028331e99e8ceaed87c683ad25de2 Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Wed, 24 Sep 2014 10:18:47 +0200 Subject: sched/wait: Provide infrastructure to deal with nested blocking There are a few places that call blocking primitives from wait loops, provide infrastructure to support this without the typical task_struct::state collision. We record the wakeup in wait_queue_t::flags which leaves task_struct::state free to be used by others. Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Oleg Nesterov Cc: tglx@linutronix.de Cc: ilya.dryomov@inktank.com Cc: umgwanakikbuti@gmail.com Cc: Linus Torvalds Link: http://lkml.kernel.org/r/20140924082242.051202318@infradead.org Signed-off-by: Ingo Molnar --- include/linux/wait.h | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/wait.h b/include/linux/wait.h index e4a8eb9312ea..fc0e99395fbb 100644 --- a/include/linux/wait.h +++ b/include/linux/wait.h @@ -13,9 +13,12 @@ typedef struct __wait_queue wait_queue_t; typedef int (*wait_queue_func_t)(wait_queue_t *wait, unsigned mode, int flags, void *key); int default_wake_function(wait_queue_t *wait, unsigned mode, int flags, void *key); +/* __wait_queue::flags */ +#define WQ_FLAG_EXCLUSIVE 0x01 +#define WQ_FLAG_WOKEN 0x02 + struct __wait_queue { unsigned int flags; -#define WQ_FLAG_EXCLUSIVE 0x01 void *private; wait_queue_func_t func; struct list_head task_list; @@ -830,6 +833,8 @@ void prepare_to_wait_exclusive(wait_queue_head_t *q, wait_queue_t *wait, int sta long prepare_to_wait_event(wait_queue_head_t *q, wait_queue_t *wait, int state); void finish_wait(wait_queue_head_t *q, wait_queue_t *wait); void abort_exclusive_wait(wait_queue_head_t *q, wait_queue_t *wait, unsigned int mode, void *key); +long wait_woken(wait_queue_t *wait, unsigned mode, long timeout); +int woken_wake_function(wait_queue_t *wait, unsigned mode, int sync, void *key); int autoremove_wake_function(wait_queue_t *wait, unsigned mode, int sync, void *key); int wake_bit_function(wait_queue_t *wait, unsigned mode, int sync, void *key); -- cgit v1.2.3 From e22b886a8a43b147e1994a9f970f678fc0df2033 Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Wed, 24 Sep 2014 10:18:48 +0200 Subject: sched/wait: Add might_sleep() checks Add more might_sleep() checks, suppose someone put a wait_event() like thing in a wait loop.. Can't put might_sleep() in ___wait_event() because there's the locked primitives which call ___wait_event() with locks held. Signed-off-by: Peter Zijlstra (Intel) Cc: tglx@linutronix.de Cc: ilya.dryomov@inktank.com Cc: umgwanakikbuti@gmail.com Cc: Oleg Nesterov Cc: Linus Torvalds Link: http://lkml.kernel.org/r/20140924082242.119255706@infradead.org Signed-off-by: Ingo Molnar --- include/linux/wait.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'include/linux') diff --git a/include/linux/wait.h b/include/linux/wait.h index fc0e99395fbb..0421775e0b9f 100644 --- a/include/linux/wait.h +++ b/include/linux/wait.h @@ -261,6 +261,7 @@ __out: __ret; \ */ #define wait_event(wq, condition) \ do { \ + might_sleep(); \ if (condition) \ break; \ __wait_event(wq, condition); \ @@ -293,6 +294,7 @@ do { \ #define wait_event_timeout(wq, condition, timeout) \ ({ \ long __ret = timeout; \ + might_sleep(); \ if (!___wait_cond_timeout(condition)) \ __ret = __wait_event_timeout(wq, condition, timeout); \ __ret; \ @@ -318,6 +320,7 @@ do { \ */ #define wait_event_cmd(wq, condition, cmd1, cmd2) \ do { \ + might_sleep(); \ if (condition) \ break; \ __wait_event_cmd(wq, condition, cmd1, cmd2); \ @@ -345,6 +348,7 @@ do { \ #define wait_event_interruptible(wq, condition) \ ({ \ int __ret = 0; \ + might_sleep(); \ if (!(condition)) \ __ret = __wait_event_interruptible(wq, condition); \ __ret; \ @@ -378,6 +382,7 @@ do { \ #define wait_event_interruptible_timeout(wq, condition, timeout) \ ({ \ long __ret = timeout; \ + might_sleep(); \ if (!___wait_cond_timeout(condition)) \ __ret = __wait_event_interruptible_timeout(wq, \ condition, timeout); \ @@ -428,6 +433,7 @@ do { \ #define wait_event_hrtimeout(wq, condition, timeout) \ ({ \ int __ret = 0; \ + might_sleep(); \ if (!(condition)) \ __ret = __wait_event_hrtimeout(wq, condition, timeout, \ TASK_UNINTERRUPTIBLE); \ @@ -453,6 +459,7 @@ do { \ #define wait_event_interruptible_hrtimeout(wq, condition, timeout) \ ({ \ long __ret = 0; \ + might_sleep(); \ if (!(condition)) \ __ret = __wait_event_hrtimeout(wq, condition, timeout, \ TASK_INTERRUPTIBLE); \ @@ -466,6 +473,7 @@ do { \ #define wait_event_interruptible_exclusive(wq, condition) \ ({ \ int __ret = 0; \ + might_sleep(); \ if (!(condition)) \ __ret = __wait_event_interruptible_exclusive(wq, condition);\ __ret; \ @@ -640,6 +648,7 @@ do { \ #define wait_event_killable(wq, condition) \ ({ \ int __ret = 0; \ + might_sleep(); \ if (!(condition)) \ __ret = __wait_event_killable(wq, condition); \ __ret; \ @@ -891,6 +900,7 @@ extern int bit_wait_io_timeout(struct wait_bit_key *); static inline int wait_on_bit(void *word, int bit, unsigned mode) { + might_sleep(); if (!test_bit(bit, word)) return 0; return out_of_line_wait_on_bit(word, bit, @@ -915,6 +925,7 @@ wait_on_bit(void *word, int bit, unsigned mode) static inline int wait_on_bit_io(void *word, int bit, unsigned mode) { + might_sleep(); if (!test_bit(bit, word)) return 0; return out_of_line_wait_on_bit(word, bit, @@ -941,6 +952,7 @@ wait_on_bit_io(void *word, int bit, unsigned mode) static inline int wait_on_bit_action(void *word, int bit, wait_bit_action_f *action, unsigned mode) { + might_sleep(); if (!test_bit(bit, word)) return 0; return out_of_line_wait_on_bit(word, bit, action, mode); @@ -968,6 +980,7 @@ wait_on_bit_action(void *word, int bit, wait_bit_action_f *action, unsigned mode static inline int wait_on_bit_lock(void *word, int bit, unsigned mode) { + might_sleep(); if (!test_and_set_bit(bit, word)) return 0; return out_of_line_wait_on_bit_lock(word, bit, bit_wait, mode); @@ -991,6 +1004,7 @@ wait_on_bit_lock(void *word, int bit, unsigned mode) static inline int wait_on_bit_lock_io(void *word, int bit, unsigned mode) { + might_sleep(); if (!test_and_set_bit(bit, word)) return 0; return out_of_line_wait_on_bit_lock(word, bit, bit_wait_io, mode); @@ -1016,6 +1030,7 @@ wait_on_bit_lock_io(void *word, int bit, unsigned mode) static inline int wait_on_bit_lock_action(void *word, int bit, wait_bit_action_f *action, unsigned mode) { + might_sleep(); if (!test_and_set_bit(bit, word)) return 0; return out_of_line_wait_on_bit_lock(word, bit, action, mode); @@ -1034,6 +1049,7 @@ wait_on_bit_lock_action(void *word, int bit, wait_bit_action_f *action, unsigned static inline int wait_on_atomic_t(atomic_t *val, int (*action)(atomic_t *), unsigned mode) { + might_sleep(); if (atomic_read(val) == 0) return 0; return out_of_line_wait_on_atomic_t(val, action, mode); -- cgit v1.2.3 From 1029a2b52c09e479fd7b07275812ad97868c0fb0 Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Wed, 24 Sep 2014 10:18:49 +0200 Subject: sched, exit: Deal with nested sleeps do_wait() is a big wait loop, but we set TASK_RUNNING too late; we end up calling potential sleeps before we reset it. Not strictly a bug since we're guaranteed to exit the loop and not call schedule(); put in annotations to quiet might_sleep(). WARNING: CPU: 0 PID: 1 at ../kernel/sched/core.c:7123 __might_sleep+0x7e/0x90() do not call blocking ops when !TASK_RUNNING; state=1 set at [] do_wait+0x88/0x270 Call Trace: [] dump_stack+0x4e/0x7a [] warn_slowpath_common+0x8c/0xc0 [] warn_slowpath_fmt+0x4c/0x50 [] __might_sleep+0x7e/0x90 [] might_fault+0x55/0xb0 [] wait_consider_task+0x90b/0xc10 [] do_wait+0x104/0x270 [] SyS_wait4+0x77/0x100 [] system_call_fastpath+0x16/0x1b Signed-off-by: Peter Zijlstra (Intel) Cc: tglx@linutronix.de Cc: umgwanakikbuti@gmail.com Cc: ilya.dryomov@inktank.com Cc: Alex Elder Cc: Andrew Morton Cc: Axel Lin Cc: Daniel Borkmann Cc: Dave Jones Cc: Guillaume Morin Cc: Ionut Alexa Cc: Jason Baron Cc: Linus Torvalds Cc: Michal Hocko Cc: Michal Schmidt Cc: Oleg Nesterov Cc: Paul E. McKenney Cc: Rik van Riel Cc: Rusty Russell Cc: Steven Rostedt Link: http://lkml.kernel.org/r/20140924082242.186408915@infradead.org Signed-off-by: Ingo Molnar --- include/linux/kernel.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/linux') diff --git a/include/linux/kernel.h b/include/linux/kernel.h index 3d770f5564b8..5068a0d9fecd 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -175,10 +175,12 @@ extern int _cond_resched(void); */ # define might_sleep() \ do { __might_sleep(__FILE__, __LINE__, 0); might_resched(); } while (0) +# define sched_annotate_sleep() __set_current_state(TASK_RUNNING) #else static inline void __might_sleep(const char *file, int line, int preempt_offset) { } # define might_sleep() do { might_resched(); } while (0) +# define sched_annotate_sleep() do { } while (0) #endif #define might_sleep_if(cond) do { if (cond) might_sleep(); } while (0) -- cgit v1.2.3 From 8eb23b9f35aae413140d3fda766a98092c21e9b0 Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Wed, 24 Sep 2014 10:18:55 +0200 Subject: sched: Debug nested sleeps Validate we call might_sleep() with TASK_RUNNING, which catches places where we nest blocking primitives, eg. mutex usage in a wait loop. Since all blocking is arranged through task_struct::state, nesting this will cause the inner primitive to set TASK_RUNNING and the outer will thus not block. Another observed problem is calling a blocking function from schedule()->sched_submit_work()->blk_schedule_flush_plug() which will then destroy the task state for the actual __schedule() call that comes after it. Signed-off-by: Peter Zijlstra (Intel) Cc: tglx@linutronix.de Cc: ilya.dryomov@inktank.com Cc: umgwanakikbuti@gmail.com Cc: oleg@redhat.com Cc: Linus Torvalds Link: http://lkml.kernel.org/r/20140924082242.591637616@infradead.org Signed-off-by: Ingo Molnar --- include/linux/sched.h | 46 ++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 44 insertions(+), 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/sched.h b/include/linux/sched.h index 320a9779f1b4..4648e07f7d6f 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -243,6 +243,43 @@ extern char ___assert_task_state[1 - 2*!!( ((task->state & TASK_UNINTERRUPTIBLE) != 0 && \ (task->flags & PF_FROZEN) == 0) +#ifdef CONFIG_DEBUG_ATOMIC_SLEEP + +#define __set_task_state(tsk, state_value) \ + do { \ + (tsk)->task_state_change = _THIS_IP_; \ + (tsk)->state = (state_value); \ + } while (0) +#define set_task_state(tsk, state_value) \ + do { \ + (tsk)->task_state_change = _THIS_IP_; \ + set_mb((tsk)->state, (state_value)); \ + } while (0) + +/* + * set_current_state() includes a barrier so that the write of current->state + * is correctly serialised wrt the caller's subsequent test of whether to + * actually sleep: + * + * set_current_state(TASK_UNINTERRUPTIBLE); + * if (do_i_need_to_sleep()) + * schedule(); + * + * If the caller does not need such serialisation then use __set_current_state() + */ +#define __set_current_state(state_value) \ + do { \ + current->task_state_change = _THIS_IP_; \ + current->state = (state_value); \ + } while (0) +#define set_current_state(state_value) \ + do { \ + current->task_state_change = _THIS_IP_; \ + set_mb(current->state, (state_value)); \ + } while (0) + +#else + #define __set_task_state(tsk, state_value) \ do { (tsk)->state = (state_value); } while (0) #define set_task_state(tsk, state_value) \ @@ -259,11 +296,13 @@ extern char ___assert_task_state[1 - 2*!!( * * If the caller does not need such serialisation then use __set_current_state() */ -#define __set_current_state(state_value) \ +#define __set_current_state(state_value) \ do { current->state = (state_value); } while (0) -#define set_current_state(state_value) \ +#define set_current_state(state_value) \ set_mb(current->state, (state_value)) +#endif + /* Task command name length */ #define TASK_COMM_LEN 16 @@ -1661,6 +1700,9 @@ struct task_struct { unsigned int sequential_io; unsigned int sequential_io_avg; #endif +#ifdef CONFIG_DEBUG_ATOMIC_SLEEP + unsigned long task_state_change; +#endif }; /* Future-safe accessor for struct task_struct's cpus_allowed. */ -- cgit v1.2.3 From 3427445afd26bd2395f29241319283a93f362cd0 Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Wed, 24 Sep 2014 10:18:56 +0200 Subject: sched: Exclude cond_resched() from nested sleep test cond_resched() is a preemption point, not strictly a blocking primitive, so exclude it from the ->state test. In particular, preemption preserves task_struct::state. Signed-off-by: Peter Zijlstra (Intel) Cc: tglx@linutronix.de Cc: ilya.dryomov@inktank.com Cc: umgwanakikbuti@gmail.com Cc: oleg@redhat.com Cc: Alex Elder Cc: Andrew Morton Cc: Axel Lin Cc: Daniel Borkmann Cc: Dave Jones Cc: Jason Baron Cc: Linus Torvalds Cc: Rusty Russell Cc: Steven Rostedt Link: http://lkml.kernel.org/r/20140924082242.656559952@infradead.org Signed-off-by: Ingo Molnar --- include/linux/kernel.h | 3 +++ include/linux/sched.h | 6 +++--- 2 files changed, 6 insertions(+), 3 deletions(-) (limited to 'include/linux') diff --git a/include/linux/kernel.h b/include/linux/kernel.h index 5068a0d9fecd..446d76a87ba1 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -162,6 +162,7 @@ extern int _cond_resched(void); #endif #ifdef CONFIG_DEBUG_ATOMIC_SLEEP + void ___might_sleep(const char *file, int line, int preempt_offset); void __might_sleep(const char *file, int line, int preempt_offset); /** * might_sleep - annotation for functions that can sleep @@ -177,6 +178,8 @@ extern int _cond_resched(void); do { __might_sleep(__FILE__, __LINE__, 0); might_resched(); } while (0) # define sched_annotate_sleep() __set_current_state(TASK_RUNNING) #else + static inline void ___might_sleep(const char *file, int line, + int preempt_offset) { } static inline void __might_sleep(const char *file, int line, int preempt_offset) { } # define might_sleep() do { might_resched(); } while (0) diff --git a/include/linux/sched.h b/include/linux/sched.h index 4648e07f7d6f..4400ddc2fe73 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -2806,7 +2806,7 @@ static inline int signal_pending_state(long state, struct task_struct *p) extern int _cond_resched(void); #define cond_resched() ({ \ - __might_sleep(__FILE__, __LINE__, 0); \ + ___might_sleep(__FILE__, __LINE__, 0); \ _cond_resched(); \ }) @@ -2819,14 +2819,14 @@ extern int __cond_resched_lock(spinlock_t *lock); #endif #define cond_resched_lock(lock) ({ \ - __might_sleep(__FILE__, __LINE__, PREEMPT_LOCK_OFFSET); \ + ___might_sleep(__FILE__, __LINE__, PREEMPT_LOCK_OFFSET);\ __cond_resched_lock(lock); \ }) extern int __cond_resched_softirq(void); #define cond_resched_softirq() ({ \ - __might_sleep(__FILE__, __LINE__, SOFTIRQ_DISABLE_OFFSET); \ + ___might_sleep(__FILE__, __LINE__, SOFTIRQ_DISABLE_OFFSET); \ __cond_resched_softirq(); \ }) -- cgit v1.2.3 From e3a2e87893125bcd99bd7e1ddf9bfc421e492572 Mon Sep 17 00:00:00 2001 From: Alexandre Courbot Date: Thu, 23 Oct 2014 17:27:07 +0900 Subject: gpio: rename gpio_lock_as_irq to gpiochip_lock_as_irq This function actually operates on a gpio_chip, so its prefix should reflect that fact for consistency with other functions defined in gpio/driver.h. Signed-off-by: Alexandre Courbot Signed-off-by: Linus Walleij --- include/linux/gpio.h | 7 ++++--- include/linux/gpio/driver.h | 4 ++-- 2 files changed, 6 insertions(+), 5 deletions(-) (limited to 'include/linux') diff --git a/include/linux/gpio.h b/include/linux/gpio.h index 85aa5d0b9357..ab81339a8590 100644 --- a/include/linux/gpio.h +++ b/include/linux/gpio.h @@ -216,14 +216,15 @@ static inline int gpio_to_irq(unsigned gpio) return -EINVAL; } -static inline int gpio_lock_as_irq(struct gpio_chip *chip, unsigned int offset) +static inline int gpiochip_lock_as_irq(struct gpio_chip *chip, + unsigned int offset) { WARN_ON(1); return -EINVAL; } -static inline void gpio_unlock_as_irq(struct gpio_chip *chip, - unsigned int offset) +static inline void gpiochip_unlock_as_irq(struct gpio_chip *chip, + unsigned int offset) { WARN_ON(1); } diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h index 249db3057e4d..ff200a75501e 100644 --- a/include/linux/gpio/driver.h +++ b/include/linux/gpio/driver.h @@ -149,8 +149,8 @@ extern struct gpio_chip *gpiochip_find(void *data, int (*match)(struct gpio_chip *chip, void *data)); /* lock/unlock as IRQ */ -int gpio_lock_as_irq(struct gpio_chip *chip, unsigned int offset); -void gpio_unlock_as_irq(struct gpio_chip *chip, unsigned int offset); +int gpiochip_lock_as_irq(struct gpio_chip *chip, unsigned int offset); +void gpiochip_unlock_as_irq(struct gpio_chip *chip, unsigned int offset); struct gpio_chip *gpiod_to_chip(const struct gpio_desc *desc); -- cgit v1.2.3 From 95f259ca3bf485a0c1f17d9024813d4aab485a23 Mon Sep 17 00:00:00 2001 From: Sebastian Hesselbarth Date: Sat, 25 Oct 2014 12:08:59 +0200 Subject: net: pxa168_eth: Fix providing of phy_interface mode on platform_data Do not add phy include to the board file but platform_data include instead. Signed-off-by: Sebastian Hesselbarth Signed-off-by: David S. Miller --- include/linux/pxa168_eth.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/linux') diff --git a/include/linux/pxa168_eth.h b/include/linux/pxa168_eth.h index 37c381120bc8..e1ab6e86cdb3 100644 --- a/include/linux/pxa168_eth.h +++ b/include/linux/pxa168_eth.h @@ -4,6 +4,8 @@ #ifndef __LINUX_PXA168_ETH_H #define __LINUX_PXA168_ETH_H +#include + struct pxa168_eth_platform_data { int port_number; int phy_addr; -- cgit v1.2.3 From 32a173c7f9e9ec2b87142f67e1478cd20084a45b Mon Sep 17 00:00:00 2001 From: Saeed Mahameed Date: Mon, 27 Oct 2014 11:37:35 +0200 Subject: net/mlx4_core: Introduce mlx4_get_module_info for cable module info reading Added new MAD_IFC command to read cable module info with attribute id (0xFF60). Update include/linux/mlx4/device.h with function declaration (mlx4_get_module_info) and the needed defines/enums for future use. Signed-off-by: Saeed Mahameed Signed-off-by: Amir Vadai Signed-off-by: David S. Miller --- include/linux/mlx4/device.h | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) (limited to 'include/linux') diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h index 37e4404d0227..73910daec317 100644 --- a/include/linux/mlx4/device.h +++ b/include/linux/mlx4/device.h @@ -379,6 +379,13 @@ enum { #define MSTR_SM_CHANGE_MASK (MLX4_EQ_PORT_INFO_MSTR_SM_SL_CHANGE_MASK | \ MLX4_EQ_PORT_INFO_MSTR_SM_LID_CHANGE_MASK) +enum mlx4_module_id { + MLX4_MODULE_ID_SFP = 0x3, + MLX4_MODULE_ID_QSFP = 0xC, + MLX4_MODULE_ID_QSFP_PLUS = 0xD, + MLX4_MODULE_ID_QSFP28 = 0x11, +}; + static inline u64 mlx4_fw_ver(u64 major, u64 minor, u64 subminor) { return (major << 32) | (minor << 16) | subminor; @@ -799,6 +806,26 @@ struct mlx4_init_port_param { u64 si_guid; }; +#define MAD_IFC_DATA_SZ 192 +/* MAD IFC Mailbox */ +struct mlx4_mad_ifc { + u8 base_version; + u8 mgmt_class; + u8 class_version; + u8 method; + __be16 status; + __be16 class_specific; + __be64 tid; + __be16 attr_id; + __be16 resv; + __be32 attr_mod; + __be64 mkey; + __be16 dr_slid; + __be16 dr_dlid; + u8 reserved[28]; + u8 data[MAD_IFC_DATA_SZ]; +} __packed; + #define mlx4_foreach_port(port, dev, type) \ for ((port) = 1; (port) <= (dev)->caps.num_ports; (port)++) \ if ((type) == (dev)->caps.port_mask[(port)]) @@ -1283,6 +1310,9 @@ int mlx4_mr_rereg_mem_write(struct mlx4_dev *dev, struct mlx4_mr *mr, u64 iova, u64 size, int npages, int page_shift, struct mlx4_mpt_entry *mpt_entry); +int mlx4_get_module_info(struct mlx4_dev *dev, u8 port, + u16 offset, u16 size, u8 *data); + /* Returns true if running in low memory profile (kdump kernel) */ static inline bool mlx4_low_memory_profile(void) { -- cgit v1.2.3 From adbc7ac5c15eb5e9d70393428345e72a1a897d6a Mon Sep 17 00:00:00 2001 From: Saeed Mahameed Date: Mon, 27 Oct 2014 11:37:37 +0200 Subject: net/mlx4_core: Introduce ACCESS_REG CMD and eth_prot_ctrl dev cap Adding ACCESS REG mlx4 command and use it to implement Query method for PTYS (Port Type and Speed Register). Query and store eth_prot_ctrl dev cap. Signed-off-by: Saeed Mahameed Signed-off-by: Amir Vadai Signed-off-by: David S. Miller --- include/linux/mlx4/cmd.h | 2 ++ include/linux/mlx4/device.h | 40 +++++++++++++++++++++++++++++++++++++++- 2 files changed, 41 insertions(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/mlx4/cmd.h b/include/linux/mlx4/cmd.h index 379c02648ab3..ff5f5deb3dcf 100644 --- a/include/linux/mlx4/cmd.h +++ b/include/linux/mlx4/cmd.h @@ -67,6 +67,8 @@ enum { MLX4_CMD_MAP_ICM_AUX = 0xffc, MLX4_CMD_UNMAP_ICM_AUX = 0xffb, MLX4_CMD_SET_ICM_SIZE = 0xffd, + MLX4_CMD_ACCESS_REG = 0x3b, + /*master notify fw on finish for slave's flr*/ MLX4_CMD_INFORM_FLR_DONE = 0x5b, MLX4_CMD_GET_OP_REQ = 0x59, diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h index 73910daec317..181cd9fc90f2 100644 --- a/include/linux/mlx4/device.h +++ b/include/linux/mlx4/device.h @@ -186,7 +186,8 @@ enum { MLX4_DEV_CAP_FLAG2_VXLAN_OFFLOADS = 1LL << 10, MLX4_DEV_CAP_FLAG2_MAD_DEMUX = 1LL << 11, MLX4_DEV_CAP_FLAG2_CQE_STRIDE = 1LL << 12, - MLX4_DEV_CAP_FLAG2_EQE_STRIDE = 1LL << 13 + MLX4_DEV_CAP_FLAG2_EQE_STRIDE = 1LL << 13, + MLX4_DEV_CAP_FLAG2_ETH_PROT_CTRL = 1LL << 14 }; enum { @@ -1319,4 +1320,41 @@ static inline bool mlx4_low_memory_profile(void) return is_kdump_kernel(); } +/* ACCESS REG commands */ +enum mlx4_access_reg_method { + MLX4_ACCESS_REG_QUERY = 0x1, + MLX4_ACCESS_REG_WRITE = 0x2, +}; + +/* ACCESS PTYS Reg command */ +enum mlx4_ptys_proto { + MLX4_PTYS_IB = 1<<0, + MLX4_PTYS_EN = 1<<2, +}; + +struct mlx4_ptys_reg { + u8 resrvd1; + u8 local_port; + u8 resrvd2; + u8 proto_mask; + __be32 resrvd3[2]; + __be32 eth_proto_cap; + __be16 ib_width_cap; + __be16 ib_speed_cap; + __be32 resrvd4; + __be32 eth_proto_admin; + __be16 ib_width_admin; + __be16 ib_speed_admin; + __be32 resrvd5; + __be32 eth_proto_oper; + __be16 ib_width_oper; + __be16 ib_speed_oper; + __be32 resrvd6; + __be32 eth_proto_lp_adv; +} __packed; + +int mlx4_ACCESS_PTYS_REG(struct mlx4_dev *dev, + enum mlx4_access_reg_method method, + struct mlx4_ptys_reg *ptys_reg); + #endif /* MLX4_DEVICE_H */ -- cgit v1.2.3 From a53e3e8c1db547981e13d1ebf24a659bd4e87710 Mon Sep 17 00:00:00 2001 From: Saeed Mahameed Date: Mon, 27 Oct 2014 11:37:38 +0200 Subject: net/mlx4_core: Add ethernet backplane autoneg device capability Signed-off-by: Saeed Mahameed Signed-off-by: Amir Vadai Signed-off-by: David S. Miller --- include/linux/mlx4/device.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h index 181cd9fc90f2..e4c136ebe79b 100644 --- a/include/linux/mlx4/device.h +++ b/include/linux/mlx4/device.h @@ -187,7 +187,8 @@ enum { MLX4_DEV_CAP_FLAG2_MAD_DEMUX = 1LL << 11, MLX4_DEV_CAP_FLAG2_CQE_STRIDE = 1LL << 12, MLX4_DEV_CAP_FLAG2_EQE_STRIDE = 1LL << 13, - MLX4_DEV_CAP_FLAG2_ETH_PROT_CTRL = 1LL << 14 + MLX4_DEV_CAP_FLAG2_ETH_PROT_CTRL = 1LL << 14, + MLX4_DEV_CAP_FLAG2_ETH_BACKPL_AN_REP = 1LL << 15 }; enum { -- cgit v1.2.3 From c241c5eea822344639898512780cff823fc7d730 Mon Sep 17 00:00:00 2001 From: Benjamin Tissoires Date: Tue, 30 Sep 2014 13:18:23 -0400 Subject: HID: fix merge from wacom into the HID tree While merging wacom from the input to the hid tree, some comments have been duplicated. We can also integrate the test for Synaptics devices in the switch case below, so it is clear that there will be only one place for such quirks. No functional changes are expected in this commit. Signed-off-by: Benjamin Tissoires Signed-off-by: Jiri Kosina --- include/linux/hid.h | 4 ---- 1 file changed, 4 deletions(-) (limited to 'include/linux') diff --git a/include/linux/hid.h b/include/linux/hid.h index 78ea9bf941cd..5b1ff6110e25 100644 --- a/include/linux/hid.h +++ b/include/linux/hid.h @@ -312,10 +312,6 @@ struct hid_item { * Vendor specific HID device groups */ #define HID_GROUP_RMI 0x0100 - -/* - * Vendor specific HID device groups - */ #define HID_GROUP_WACOM 0x0101 /* -- cgit v1.2.3 From d610274b0301e5ef35811fa736036d022f707564 Mon Sep 17 00:00:00 2001 From: Benjamin Tissoires Date: Tue, 30 Sep 2014 13:18:25 -0400 Subject: HID: logitech-dj: rely on hid groups to separate receivers from dj devices Several benefits here: - we can drop the macro is_dj_device: I never been really conviced by this macro as we could fall into a null pointer anytime. Anyway time showed that this never happened. - we can simplify the hid driver logitech-djdevice, and make it aware of any new receiver VID/PID. - we can use the Wireless PID of the DJ device as the product id of the hid device, this way the sysfs will differentiate between different DJ devices. Signed-off-by: Benjamin Tisssoires Tested-by: Andrew de los Reyes Signed-off-by: Jiri Kosina --- include/linux/hid.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/hid.h b/include/linux/hid.h index 5b1ff6110e25..7d6e0556302a 100644 --- a/include/linux/hid.h +++ b/include/linux/hid.h @@ -313,6 +313,7 @@ struct hid_item { */ #define HID_GROUP_RMI 0x0100 #define HID_GROUP_WACOM 0x0101 +#define HID_GROUP_LOGITECH_DJ_DEVICE 0x0102 /* * This is the global environment of the parser. This information is -- cgit v1.2.3 From de869917c663f44b5b032bff238bad22e15dda56 Mon Sep 17 00:00:00 2001 From: Michael Opdenacker Date: Thu, 2 Oct 2014 06:45:38 +0200 Subject: mod_devicetable.h: grammar fix in comment Signed-off-by: Michael Opdenacker Signed-off-by: Jiri Kosina --- include/linux/mod_devicetable.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h index 44eeef0da186..745def862580 100644 --- a/include/linux/mod_devicetable.h +++ b/include/linux/mod_devicetable.h @@ -69,7 +69,7 @@ struct ieee1394_device_id { * @bDeviceClass: Class of device; numbers are assigned * by the USB forum. Products may choose to implement classes, * or be vendor-specific. Device classes specify behavior of all - * the interfaces on a devices. + * the interfaces on a device. * @bDeviceSubClass: Subclass of device; associated with bDeviceClass. * @bDeviceProtocol: Protocol of device; associated with bDeviceClass. * @bInterfaceClass: Class of interface; numbers are assigned -- cgit v1.2.3 From 9e3680b1750b9a62680b0262c9f438de98b77655 Mon Sep 17 00:00:00 2001 From: Heena Sirwani Date: Wed, 29 Oct 2014 16:01:16 +0530 Subject: timekeeping: Provide fast accessor to the seconds part of CLOCK_MONOTONIC This is the counterpart to get_seconds() based on CLOCK_MONOTONIC. The use case for this interface are kernel internal coarse grained timestamps which do neither require the nanoseconds fraction of current time nor the CLOCK_REALTIME properties. Such timestamps can currently only retrieved by calling ktime_get_ts64() and using the tv_sec field of the returned timespec64. That's inefficient as it involves the read of the clocksource, math operations and must be protected by the timekeeper sequence counter. To avoid the sequence counter protection we restrict the return value to unsigned 32bit on 32bit machines. This covers ~136 years of uptime and therefor an overflow is not expected to hit anytime soon. To avoid math in the function we calculate the current seconds portion of CLOCK_MONOTONIC when the timekeeper gets updated in tk_update_ktime_data() similar to the CLOCK_REALTIME counterpart xtime_sec. [ tglx: Massaged changelog, simplified and commented the update function, added docbook comment ] Signed-off-by: Heena Sirwani Reviewed-by: Arnd Bergman Cc: John Stultz Cc: opw-kernel@googlegroups.com Link: http://lkml.kernel.org/r/da0b63f4bdf3478909f92becb35861197da3a905.1414578445.git.heenasirwani@gmail.com Signed-off-by: Thomas Gleixner --- include/linux/timekeeper_internal.h | 2 ++ include/linux/timekeeping.h | 1 + 2 files changed, 3 insertions(+) (limited to 'include/linux') diff --git a/include/linux/timekeeper_internal.h b/include/linux/timekeeper_internal.h index 95640dcd1899..05af9a334893 100644 --- a/include/linux/timekeeper_internal.h +++ b/include/linux/timekeeper_internal.h @@ -42,6 +42,7 @@ struct tk_read_base { * struct timekeeper - Structure holding internal timekeeping values. * @tkr: The readout base structure * @xtime_sec: Current CLOCK_REALTIME time in seconds + * @ktime_sec: Current CLOCK_MONOTONIC time in seconds * @wall_to_monotonic: CLOCK_REALTIME to CLOCK_MONOTONIC offset * @offs_real: Offset clock monotonic -> clock realtime * @offs_boot: Offset clock monotonic -> clock boottime @@ -77,6 +78,7 @@ struct tk_read_base { struct timekeeper { struct tk_read_base tkr; u64 xtime_sec; + unsigned long ktime_sec; struct timespec64 wall_to_monotonic; ktime_t offs_real; ktime_t offs_boot; diff --git a/include/linux/timekeeping.h b/include/linux/timekeeping.h index 1caa6b04fdc5..115d55e11bc9 100644 --- a/include/linux/timekeeping.h +++ b/include/linux/timekeeping.h @@ -28,6 +28,7 @@ struct timespec __current_kernel_time(void); struct timespec get_monotonic_coarse(void); extern void getrawmonotonic(struct timespec *ts); extern void ktime_get_ts64(struct timespec64 *ts); +extern time64_t ktime_get_seconds(void); extern int __getnstimeofday64(struct timespec64 *tv); extern void getnstimeofday64(struct timespec64 *tv); -- cgit v1.2.3 From dbe7aa622db96b5cd601f59d09c4f00b98b76079 Mon Sep 17 00:00:00 2001 From: Heena Sirwani Date: Wed, 29 Oct 2014 16:01:50 +0530 Subject: timekeeping: Provide y2038 safe accessor to the seconds portion of CLOCK_REALTIME ktime_get_real_seconds() is the replacement function for get_seconds() returning the seconds portion of CLOCK_REALTIME in a time64_t. For 64bit the function is equivivalent to get_seconds(), but for 32bit it protects the readout with the timekeeper sequence count. This is required because 32-bit machines cannot access 64-bit tk->xtime_sec variable atomically. [tglx: Massaged changelog and added docbook comment ] Signed-off-by: Heena Sirwani Reviewed-by: Arnd Bergman Cc: John Stultz Cc: opw-kernel@googlegroups.com Link: http://lkml.kernel.org/r/7adcfaa8962b8ad58785d9a2456c3f77d93c0ffb.1414578445.git.heenasirwani@gmail.com Signed-off-by: Thomas Gleixner --- include/linux/timekeeping.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/timekeeping.h b/include/linux/timekeeping.h index 115d55e11bc9..91454dea2bc6 100644 --- a/include/linux/timekeeping.h +++ b/include/linux/timekeeping.h @@ -29,6 +29,7 @@ struct timespec get_monotonic_coarse(void); extern void getrawmonotonic(struct timespec *ts); extern void ktime_get_ts64(struct timespec64 *ts); extern time64_t ktime_get_seconds(void); +extern time64_t ktime_get_real_seconds(void); extern int __getnstimeofday64(struct timespec64 *tv); extern void getnstimeofday64(struct timespec64 *tv); -- cgit v1.2.3 From 74c450521dd8d245b982da62592a18aa6f88b045 Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Wed, 29 Oct 2014 11:14:52 -0600 Subject: blk-mq: add a 'list' parameter to ->queue_rq() Since we have the notion of a 'last' request in a chain, we can use this to have the hardware optimize the issuing of requests. Add a list_head parameter to queue_rq that the driver can use to temporarily store hw commands for issue when 'last' is true. If we are doing a chain of requests, pass in a NULL list for the first request to force issue of that immediately, then batch the remainder for deferred issue until the last request has been sent. Instead of adding yet another argument to the hot ->queue_rq path, encapsulate the passed arguments in a blk_mq_queue_data structure. This is passed as a constant, and has been tested as faster than passing 4 (or even 3) args through ->queue_rq. Update drivers for the new ->queue_rq() prototype. There are no functional changes in this patch for drivers - if they don't use the passed in list, then they will just queue requests individually like before. Signed-off-by: Jens Axboe --- include/linux/blk-mq.h | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h index c9be1589415a..be01d7a687d4 100644 --- a/include/linux/blk-mq.h +++ b/include/linux/blk-mq.h @@ -79,7 +79,13 @@ struct blk_mq_tag_set { struct list_head tag_list; }; -typedef int (queue_rq_fn)(struct blk_mq_hw_ctx *, struct request *, bool); +struct blk_mq_queue_data { + struct request *rq; + struct list_head *list; + bool last; +}; + +typedef int (queue_rq_fn)(struct blk_mq_hw_ctx *, const struct blk_mq_queue_data *); typedef struct blk_mq_hw_ctx *(map_queue_fn)(struct request_queue *, const int); typedef enum blk_eh_timer_return (timeout_fn)(struct request *, bool); typedef int (init_hctx_fn)(struct blk_mq_hw_ctx *, void *, unsigned int); -- cgit v1.2.3 From e167dfb53cb85fde7b15f644e9dbef7ba31896b6 Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Wed, 29 Oct 2014 11:18:26 -0600 Subject: blk-mq: add BLK_MQ_F_DEFER_ISSUE support flag Drivers can now tell blk-mq if they take advantage of the deferred issue through 'last' or not. If they do, don't do queue-direct for sync IO. This is a preparation patch for the nvme conversion. Signed-off-by: Jens Axboe --- include/linux/blk-mq.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h index be01d7a687d4..c3b64ec5321e 100644 --- a/include/linux/blk-mq.h +++ b/include/linux/blk-mq.h @@ -146,6 +146,7 @@ enum { BLK_MQ_F_TAG_SHARED = 1 << 1, BLK_MQ_F_SG_MERGE = 1 << 2, BLK_MQ_F_SYSFS_UP = 1 << 3, + BLK_MQ_F_DEFER_ISSUE = 1 << 4, BLK_MQ_S_STOPPED = 0, BLK_MQ_S_TAG_ACTIVE = 1, -- cgit v1.2.3 From 28f6569ab7d036cd4ee94c26bb76dc1b3f3fc056 Mon Sep 17 00:00:00 2001 From: Pranith Kumar Date: Mon, 22 Sep 2014 14:00:48 -0400 Subject: rcu: Remove redundant TREE_PREEMPT_RCU config option PREEMPT_RCU and TREE_PREEMPT_RCU serve the same function after TINY_PREEMPT_RCU has been removed. This patch removes TREE_PREEMPT_RCU and uses PREEMPT_RCU config option in its place. Signed-off-by: Pranith Kumar Signed-off-by: Paul E. McKenney --- include/linux/init_task.h | 2 +- include/linux/rcupdate.h | 6 +++--- include/linux/sched.h | 4 ++-- 3 files changed, 6 insertions(+), 6 deletions(-) (limited to 'include/linux') diff --git a/include/linux/init_task.h b/include/linux/init_task.h index 77fc43f8fb72..d996aef8044f 100644 --- a/include/linux/init_task.h +++ b/include/linux/init_task.h @@ -102,7 +102,7 @@ extern struct group_info init_groups; #define INIT_IDS #endif -#ifdef CONFIG_TREE_PREEMPT_RCU +#ifdef CONFIG_PREEMPT_RCU #define INIT_TASK_RCU_TREE_PREEMPT() \ .rcu_blocked_node = NULL, #else diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h index a4a819ffb2d1..295bb4595de6 100644 --- a/include/linux/rcupdate.h +++ b/include/linux/rcupdate.h @@ -57,7 +57,7 @@ enum rcutorture_type { INVALID_RCU_FLAVOR }; -#if defined(CONFIG_TREE_RCU) || defined(CONFIG_TREE_PREEMPT_RCU) +#if defined(CONFIG_TREE_RCU) || defined(CONFIG_PREEMPT_RCU) void rcutorture_get_gp_data(enum rcutorture_type test_type, int *flags, unsigned long *gpnum, unsigned long *completed); void rcutorture_record_test_transition(void); @@ -365,7 +365,7 @@ typedef void call_rcu_func_t(struct rcu_head *head, void (*func)(struct rcu_head *head)); void wait_rcu_gp(call_rcu_func_t crf); -#if defined(CONFIG_TREE_RCU) || defined(CONFIG_TREE_PREEMPT_RCU) +#if defined(CONFIG_TREE_RCU) || defined(CONFIG_PREEMPT_RCU) #include #elif defined(CONFIG_TINY_RCU) #include @@ -852,7 +852,7 @@ static inline void rcu_preempt_sleep_check(void) * * In non-preemptible RCU implementations (TREE_RCU and TINY_RCU), * it is illegal to block while in an RCU read-side critical section. - * In preemptible RCU implementations (TREE_PREEMPT_RCU) in CONFIG_PREEMPT + * In preemptible RCU implementations (PREEMPT_RCU) in CONFIG_PREEMPT * kernel builds, RCU read-side critical sections may be preempted, * but explicit blocking is illegal. Finally, in preemptible RCU * implementations in real-time (with -rt patchset) kernel builds, RCU diff --git a/include/linux/sched.h b/include/linux/sched.h index 5e344bbe63ec..706a9f744909 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1278,9 +1278,9 @@ struct task_struct { union rcu_special rcu_read_unlock_special; struct list_head rcu_node_entry; #endif /* #ifdef CONFIG_PREEMPT_RCU */ -#ifdef CONFIG_TREE_PREEMPT_RCU +#ifdef CONFIG_PREEMPT_RCU struct rcu_node *rcu_blocked_node; -#endif /* #ifdef CONFIG_TREE_PREEMPT_RCU */ +#endif /* #ifdef CONFIG_PREEMPT_RCU */ #ifdef CONFIG_TASKS_RCU unsigned long rcu_tasks_nvcsw; bool rcu_tasks_holdout; -- cgit v1.2.3 From dca145ffaa8d39ea1904491ac81b92b7049372c0 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Mon, 27 Oct 2014 21:45:24 -0700 Subject: tcp: allow for bigger reordering level While testing upcoming Yaogong patch (converting out of order queue into an RB tree), I hit the max reordering level of linux TCP stack. Reordering level was limited to 127 for no good reason, and some network setups [1] can easily reach this limit and get limited throughput. Allow a new max limit of 300, and add a sysctl to allow admins to even allow bigger (or lower) values if needed. [1] Aggregation of links, per packet load balancing, fabrics not doing deep packet inspections, alternative TCP congestion modules... Signed-off-by: Eric Dumazet Cc: Yaogong Wang Signed-off-by: David S. Miller --- include/linux/tcp.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/tcp.h b/include/linux/tcp.h index c2dee7deefa8..f566b8567892 100644 --- a/include/linux/tcp.h +++ b/include/linux/tcp.h @@ -204,10 +204,10 @@ struct tcp_sock { u16 urg_data; /* Saved octet of OOB data and control flags */ u8 ecn_flags; /* ECN status bits. */ - u8 reordering; /* Packet reordering metric. */ + u8 keepalive_probes; /* num of allowed keep alive probes */ + u32 reordering; /* Packet reordering metric. */ u32 snd_up; /* Urgent pointer */ - u8 keepalive_probes; /* num of allowed keep alive probes */ /* * Options received (usually on last packet, some only on SYN packets). */ -- cgit v1.2.3 From 7fd2561e4ebdd070ebba6d3326c4c5b13942323f Mon Sep 17 00:00:00 2001 From: Erik Kline Date: Tue, 28 Oct 2014 18:11:14 +0900 Subject: net: ipv6: Add a sysctl to make optimistic addresses useful candidates Add a sysctl that causes an interface's optimistic addresses to be considered equivalent to other non-deprecated addresses for source address selection purposes. Preferred addresses will still take precedence over optimistic addresses, subject to other ranking in the source address selection algorithm. This is useful where different interfaces are connected to different networks from different ISPs (e.g., a cell network and a home wifi network). The current behaviour complies with RFC 3484/6724, and it makes sense if the host has only one interface, or has multiple interfaces on the same network (same or cooperating administrative domain(s), but not in the multiple distinct networks case. For example, if a mobile device has an IPv6 address on an LTE network and then connects to IPv6-enabled wifi, while the wifi IPv6 address is undergoing DAD, IPv6 connections will try use the wifi default route with the LTE IPv6 address, and will get stuck until they time out. Also, because optimistic nodes can receive frames, issue an RTM_NEWADDR as soon as DAD starts (with the IFA_F_OPTIMSTIC flag appropriately set). A second RTM_NEWADDR is sent if DAD completes (the address flags have changed), otherwise an RTM_DELADDR is sent. Also: add an entry in ip-sysctl.txt for optimistic_dad. Signed-off-by: Erik Kline Acked-by: Lorenzo Colitti Acked-by: Hannes Frederic Sowa Signed-off-by: David S. Miller --- include/linux/ipv6.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h index ff560537dd61..7121a2e97ce2 100644 --- a/include/linux/ipv6.h +++ b/include/linux/ipv6.h @@ -42,6 +42,7 @@ struct ipv6_devconf { __s32 accept_ra_from_local; #ifdef CONFIG_IPV6_OPTIMISTIC_DAD __s32 optimistic_dad; + __s32 use_optimistic; #endif #ifdef CONFIG_IPV6_MROUTE __s32 mc_forwarding; -- cgit v1.2.3 From bc9ad166e38ae1cdcb5323a8aa45dff834d68bfa Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Tue, 28 Oct 2014 18:05:13 -0700 Subject: net: introduce napi_schedule_irqoff() napi_schedule() can be called from any context and has to mask hard irqs. Add a variant that can only be called from hard interrupts handlers or when irqs are already masked. Many NIC drivers can use it from their hard IRQ handler instead of generic variant. Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller --- include/linux/netdevice.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'include/linux') diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 74fd5d37f15a..c85e06512246 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -386,6 +386,7 @@ typedef enum rx_handler_result rx_handler_result_t; typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb); void __napi_schedule(struct napi_struct *n); +void __napi_schedule_irqoff(struct napi_struct *n); static inline bool napi_disable_pending(struct napi_struct *n) { @@ -420,6 +421,18 @@ static inline void napi_schedule(struct napi_struct *n) __napi_schedule(n); } +/** + * napi_schedule_irqoff - schedule NAPI poll + * @n: napi context + * + * Variant of napi_schedule(), assuming hard irqs are masked. + */ +static inline void napi_schedule_irqoff(struct napi_struct *n) +{ + if (napi_schedule_prep(n)) + __napi_schedule_irqoff(n); +} + /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */ static inline bool napi_reschedule(struct napi_struct *napi) { -- cgit v1.2.3 From 1f33c41c03daece85a84b8dcea5733f3efe3e2b0 Mon Sep 17 00:00:00 2001 From: Joe Perches Date: Mon, 29 Sep 2014 16:08:21 -0700 Subject: seq_file: Rename seq_overflow() to seq_has_overflowed() and make public The return values of seq_printf/puts/putc are frequently misused. Start down a path to remove all the return value uses of these functions. Move the seq_overflow() to a global inlined function called seq_has_overflowed() that can be used by the users of seq_file() calls. Update the documentation to not show return types for seq_printf et al. Add a description of seq_has_overflowed(). Link: http://lkml.kernel.org/p/848ac7e3d1c31cddf638a8526fa3c59fa6fdeb8a.1412031505.git.joe@perches.com Cc: Al Viro Signed-off-by: Joe Perches [ Reworked the original patch from Joe ] Signed-off-by: Steven Rostedt --- include/linux/seq_file.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'include/linux') diff --git a/include/linux/seq_file.h b/include/linux/seq_file.h index 52e0097f61f0..cf6a9daaaf6d 100644 --- a/include/linux/seq_file.h +++ b/include/linux/seq_file.h @@ -42,6 +42,21 @@ struct seq_operations { #define SEQ_SKIP 1 +/** + * seq_has_overflowed - check if the buffer has overflowed + * @m: the seq_file handle + * + * seq_files have a buffer which may overflow. When this happens a larger + * buffer is reallocated and all the data will be printed again. + * The overflow state is true when m->count == m->size. + * + * Returns true if the buffer received more than it can hold. + */ +static inline bool seq_has_overflowed(struct seq_file *m) +{ + return m->count == m->size; +} + /** * seq_get_buf - get buffer to write arbitrary data to * @m: the seq_file handle -- cgit v1.2.3 From f3bea49115b21e0995abf41402ad2f4d9c69eda4 Mon Sep 17 00:00:00 2001 From: "Steven Rostedt (Red Hat)" Date: Wed, 2 Jul 2014 23:23:31 -0400 Subject: ftrace/x86: Add dynamic allocated trampoline for ftrace_ops The current method of handling multiple function callbacks is to register a list function callback that calls all the other callbacks based on their hash tables and compare it to the function that the callback was called on. But this is very inefficient. For example, if you are tracing all functions in the kernel and then add a kprobe to a function such that the kprobe uses ftrace, the mcount trampoline will switch from calling the function trace callback to calling the list callback that will iterate over all registered ftrace_ops (in this case, the function tracer and the kprobes callback). That means for every function being traced it checks the hash of the ftrace_ops for function tracing and kprobes, even though the kprobes is only set at a single function. The kprobes ftrace_ops is checked for every function being traced! Instead of calling the list function for functions that are only being traced by a single callback, we can call a dynamically allocated trampoline that calls the callback directly. The function graph tracer already uses a direct call trampoline when it is being traced by itself but it is not dynamically allocated. It's trampoline is static in the kernel core. The infrastructure that called the function graph trampoline can also be used to call a dynamically allocated one. For now, only ftrace_ops that are not dynamically allocated can have a trampoline. That is, users such as function tracer or stack tracer. kprobes and perf allocate their ftrace_ops, and until there's a safe way to free the trampoline, it can not be used. The dynamically allocated ftrace_ops may, although, use the trampoline if the kernel is not compiled with CONFIG_PREEMPT. But that will come later. Tested-by: Masami Hiramatsu Tested-by: Jiri Kosina Signed-off-by: Steven Rostedt --- include/linux/ftrace.h | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'include/linux') diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h index 662697babd48..06e3ca5a5083 100644 --- a/include/linux/ftrace.h +++ b/include/linux/ftrace.h @@ -94,6 +94,13 @@ ftrace_func_t ftrace_ops_get_func(struct ftrace_ops *ops); * ADDING - The ops is in the process of being added. * REMOVING - The ops is in the process of being removed. * MODIFYING - The ops is in the process of changing its filter functions. + * ALLOC_TRAMP - A dynamic trampoline was allocated by the core code. + * The arch specific code sets this flag when it allocated a + * trampoline. This lets the arch know that it can update the + * trampoline in case the callback function changes. + * The ftrace_ops trampoline can be set by the ftrace users, and + * in such cases the arch must not modify it. Only the arch ftrace + * core code should set this flag. */ enum { FTRACE_OPS_FL_ENABLED = 1 << 0, @@ -108,6 +115,7 @@ enum { FTRACE_OPS_FL_ADDING = 1 << 9, FTRACE_OPS_FL_REMOVING = 1 << 10, FTRACE_OPS_FL_MODIFYING = 1 << 11, + FTRACE_OPS_FL_ALLOC_TRAMP = 1 << 12, }; #ifdef CONFIG_DYNAMIC_FTRACE -- cgit v1.2.3 From ac7576f4b1da8c9c6bc1ae026c2b9e86ae617ba5 Mon Sep 17 00:00:00 2001 From: Miklos Szeredi Date: Thu, 30 Oct 2014 17:37:34 +0100 Subject: vfs: make first argument of dir_context.actor typed Signed-off-by: Miklos Szeredi Signed-off-by: Al Viro --- include/linux/fs.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/fs.h b/include/linux/fs.h index 9ab779e8a63c..00c8e4f65cb6 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1467,7 +1467,10 @@ int fiemap_check_flags(struct fiemap_extent_info *fieinfo, u32 fs_flags); * This allows the kernel to read directories into kernel space or * to have different dirent layouts depending on the binary type. */ -typedef int (*filldir_t)(void *, const char *, int, loff_t, u64, unsigned); +struct dir_context; +typedef int (*filldir_t)(struct dir_context *, const char *, int, loff_t, u64, + unsigned); + struct dir_context { const filldir_t actor; loff_t pos; -- cgit v1.2.3 From a7400222e3eb7d5ce3820d2234905bbeafabd171 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Tue, 21 Oct 2014 15:20:42 -0400 Subject: new helper: is_root_inode() replace open-coded instances Signed-off-by: Al Viro --- include/linux/fs.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include/linux') diff --git a/include/linux/fs.h b/include/linux/fs.h index 00c8e4f65cb6..1c12c681803f 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2789,6 +2789,11 @@ static inline void inode_has_no_xattr(struct inode *inode) inode->i_flags |= S_NOSEC; } +static inline bool is_root_inode(struct inode *inode) +{ + return inode == inode->i_sb->s_root->d_inode; +} + static inline bool dir_emit(struct dir_context *ctx, const char *name, int namelen, u64 ino, unsigned type) -- cgit v1.2.3 From cb904b0a16305f9b2a98200cc6eb9dc3610278b0 Mon Sep 17 00:00:00 2001 From: Alexander Aring Date: Sun, 2 Nov 2014 04:18:45 +0100 Subject: ieee802154: add extended address validation helper This patch introduce an extended address validation helper to check if an extended address is valid or not. Signed-off-by: Alexander Aring Signed-off-by: Marcel Holtmann --- include/linux/ieee802154.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'include/linux') diff --git a/include/linux/ieee802154.h b/include/linux/ieee802154.h index 6e50a2a1d485..9bba5ca7f0ad 100644 --- a/include/linux/ieee802154.h +++ b/include/linux/ieee802154.h @@ -197,4 +197,18 @@ static inline bool ieee802154_is_valid_psdu_len(const u8 len) return (len >= IEEE802154_MIN_PSDU_LEN && len <= IEEE802154_MTU); } +/** + * ieee802154_is_valid_psdu_len - check if extended addr is valid + * @addr: extended addr to check + */ +static inline bool ieee802154_is_valid_extended_addr(const __le64 addr) +{ + /* These EUI-64 addresses are reserved by IEEE. 0xffffffffffffffff + * is used internally as extended to short address broadcast mapping. + * This is currently a workaround because neighbor discovery can't + * deal with short addresses types right now. + */ + return ((addr != 0x0000000000000000) || (addr != 0xffffffffffffffff)); +} + #endif /* LINUX_IEEE802154_H */ -- cgit v1.2.3 From a4164eb4dd3f4f2a22f8bf7b26394e8384f3d9a2 Mon Sep 17 00:00:00 2001 From: Alexander Aring Date: Sun, 2 Nov 2014 21:43:01 +0100 Subject: ieee802154: add missing ULL definition Running make C=2 occurs warning: constant 0xffffffffffffffff is so big it is unsigned long This patch fix this warning by adding a ULL to the constant definitions. Signed-off-by: Alexander Aring Reported-by: Marcel Holtmann Signed-off-by: Marcel Holtmann --- include/linux/ieee802154.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/ieee802154.h b/include/linux/ieee802154.h index 9bba5ca7f0ad..9da7c011fbba 100644 --- a/include/linux/ieee802154.h +++ b/include/linux/ieee802154.h @@ -208,7 +208,8 @@ static inline bool ieee802154_is_valid_extended_addr(const __le64 addr) * This is currently a workaround because neighbor discovery can't * deal with short addresses types right now. */ - return ((addr != 0x0000000000000000) || (addr != 0xffffffffffffffff)); + return ((addr != 0x0000000000000000ULL) || + (addr != 0xffffffffffffffffULL)); } #endif /* LINUX_IEEE802154_H */ -- cgit v1.2.3 From c28bee84c5c49312befe1b442e1044ac2392d80d Mon Sep 17 00:00:00 2001 From: Alexander Aring Date: Sun, 2 Nov 2014 21:43:02 +0100 Subject: ieee802154: fix byteorder issues This patch fix byteorder issues which occurs because we compare __le64 with an host byteorder value. Simple add a cpu_to_le64 to convert the host byteorder values to __le64. Signed-off-by: Alexander Aring Reported-by: Marcel Holtmann Signed-off-by: Marcel Holtmann --- include/linux/ieee802154.h | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/ieee802154.h b/include/linux/ieee802154.h index 9da7c011fbba..5d9e7459d94b 100644 --- a/include/linux/ieee802154.h +++ b/include/linux/ieee802154.h @@ -24,6 +24,7 @@ #define LINUX_IEEE802154_H #include +#include #define IEEE802154_MTU 127 #define IEEE802154_MIN_PSDU_LEN 5 @@ -208,8 +209,8 @@ static inline bool ieee802154_is_valid_extended_addr(const __le64 addr) * This is currently a workaround because neighbor discovery can't * deal with short addresses types right now. */ - return ((addr != 0x0000000000000000ULL) || - (addr != 0xffffffffffffffffULL)); + return ((addr != cpu_to_le64(0x0000000000000000ULL)) || + (addr != cpu_to_le64(0xffffffffffffffffULL))); } #endif /* LINUX_IEEE802154_H */ -- cgit v1.2.3 From 1a3f83f6493f9d78aa0fe31401fd530b0fe296da Mon Sep 17 00:00:00 2001 From: JD Cole Date: Fri, 31 Oct 2014 17:34:42 -0700 Subject: HID: plantronics: fix errant mouse events This version of the driver prevents Telephony pages which are not mapped as Consumer Control applications AND are not on the Consumer Page from being registered by the hid-input driver. Signed-off-by: JD Cole Reviewed-by: Dmitry Torokhov Signed-off-by: Jiri Kosina --- include/linux/hid.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/linux') diff --git a/include/linux/hid.h b/include/linux/hid.h index 78ea9bf941cd..a63f2aaed646 100644 --- a/include/linux/hid.h +++ b/include/linux/hid.h @@ -234,6 +234,9 @@ struct hid_item { #define HID_DG_BARRELSWITCH 0x000d0044 #define HID_DG_ERASER 0x000d0045 #define HID_DG_TABLETPICK 0x000d0046 + +#define HID_CP_CONSUMERCONTROL 0x000c0001 + #define HID_DG_CONFIDENCE 0x000d0047 #define HID_DG_WIDTH 0x000d0048 #define HID_DG_HEIGHT 0x000d0049 -- cgit v1.2.3 From a45c30ec59342c47604ea074bcf56a43a8cde8aa Mon Sep 17 00:00:00 2001 From: JD Cole Date: Fri, 31 Oct 2014 17:44:42 -0700 Subject: HID: added missing HID Consumer Page identifiers Adds CA and NAry usage type identifiers. Signed-off-by: JD Cole Signed-off-by: Jiri Kosina --- include/linux/hid.h | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) (limited to 'include/linux') diff --git a/include/linux/hid.h b/include/linux/hid.h index a63f2aaed646..58a89ed86acc 100644 --- a/include/linux/hid.h +++ b/include/linux/hid.h @@ -236,6 +236,30 @@ struct hid_item { #define HID_DG_TABLETPICK 0x000d0046 #define HID_CP_CONSUMERCONTROL 0x000c0001 +#define HID_CP_NUMERICKEYPAD 0x000c0002 +#define HID_CP_PROGRAMMABLEBUTTONS 0x000c0003 +#define HID_CP_MICROPHONE 0x000c0004 +#define HID_CP_HEADPHONE 0x000c0005 +#define HID_CP_GRAPHICEQUALIZER 0x000c0006 +#define HID_CP_FUNCTIONBUTTONS 0x000c0036 +#define HID_CP_SELECTION 0x000c0080 +#define HID_CP_MEDIASELECTION 0x000c0087 +#define HID_CP_SELECTDISC 0x000c00ba +#define HID_CP_PLAYBACKSPEED 0x000c00f1 +#define HID_CP_PROXIMITY 0x000c0109 +#define HID_CP_SPEAKERSYSTEM 0x000c0160 +#define HID_CP_CHANNELLEFT 0x000c0161 +#define HID_CP_CHANNELRIGHT 0x000c0162 +#define HID_CP_CHANNELCENTER 0x000c0163 +#define HID_CP_CHANNELFRONT 0x000c0164 +#define HID_CP_CHANNELCENTERFRONT 0x000c0165 +#define HID_CP_CHANNELSIDE 0x000c0166 +#define HID_CP_CHANNELSURROUND 0x000c0167 +#define HID_CP_CHANNELLOWFREQUENCYENHANCEMENT 0x000c0168 +#define HID_CP_CHANNELTOP 0x000c0169 +#define HID_CP_CHANNELUNKNOWN 0x000c016a +#define HID_CP_APPLICATIONLAUNCHBUTTONS 0x000c0180 +#define HID_CP_GENERICGUIAPPLICATIONCONTROLS 0x000c0200 #define HID_DG_CONFIDENCE 0x000d0047 #define HID_DG_WIDTH 0x000d0048 -- cgit v1.2.3 From 6c93b5342374b3ff2a8beac050ed6e07373cbe95 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Thu, 18 Sep 2014 09:51:23 -0500 Subject: usb: gadget: composite: introduce setup and os_desc pending flags These flags we be set to true whenever their matching request is queued. They will be cleared to false when that request completes. Signed-off-by: Felipe Balbi --- include/linux/usb/composite.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include/linux') diff --git a/include/linux/usb/composite.h b/include/linux/usb/composite.h index c330f5ef42cf..ed3811c09ec1 100644 --- a/include/linux/usb/composite.h +++ b/include/linux/usb/composite.h @@ -427,6 +427,8 @@ static inline struct usb_composite_driver *to_cdriver( * @b_vendor_code: bMS_VendorCode part of the OS string * @use_os_string: false by default, interested gadgets set it * @os_desc_config: the configuration to be used with OS descriptors + * @setup_pending: true when setup request is queued but not completed + * @os_desc_pending: true when os_desc request is queued but not completed * * One of these devices is allocated and initialized before the * associated device driver's bind() is called. @@ -488,6 +490,9 @@ struct usb_composite_dev { /* protects deactivations and delayed_status counts*/ spinlock_t lock; + + unsigned setup_pending:1; + unsigned os_desc_pending:1; }; extern int usb_string_id(struct usb_composite_dev *c); -- cgit v1.2.3 From 3a571870856f63064a3a45d7ffa2526d597b7fbe Mon Sep 17 00:00:00 2001 From: Andrzej Pietrasiewicz Date: Wed, 8 Oct 2014 12:03:36 +0200 Subject: usb: gadget: configfs: add suspend/resume USB gadgets composed with configfs lack suspend and resume methods. This patch uses composite_suspend()/composite_resume() the same way e.g. composite_setup() or composite_disconnect() are used in a configfs-based gadget. Signed-off-by: Andrzej Pietrasiewicz Signed-off-by: Felipe Balbi --- include/linux/usb/composite.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/linux') diff --git a/include/linux/usb/composite.h b/include/linux/usb/composite.h index ed3811c09ec1..3d87defcc527 100644 --- a/include/linux/usb/composite.h +++ b/include/linux/usb/composite.h @@ -506,6 +506,8 @@ extern int usb_string_ids_n(struct usb_composite_dev *c, unsigned n); extern void composite_disconnect(struct usb_gadget *gadget); extern int composite_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl); +extern void composite_suspend(struct usb_gadget *gadget); +extern void composite_resume(struct usb_gadget *gadget); /* * Some systems will need runtime overrides for the product identifiers -- cgit v1.2.3 From 22835b807e7ca946a4d1fbd4c7af56aa09cd273e Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Fri, 17 Oct 2014 12:05:12 -0500 Subject: usb: gadget: remove unnecessary 'driver' argument now that no UDC driver relies on the extra 'driver' argument to ->udc_stop(), we can safely remove it. This commit is based on previous work by Robert Baldyga which can be found at [1]; however that patch turned out to have a high probability of regressing many UDC drivers because of a blind search & replace s/driver/$udc->driver/ which caused the 'driver' argument to stop_activity() to be a valid non-NULL pointer when it should be NULL, thus causing UDCs to mistakenly call gadget driver's ->disconnect() callback. [1] http://markmail.org/message/x5zneg4xea4zntab Acked-by: Peter Chen Signed-off-by: Felipe Balbi --- include/linux/usb/gadget.h | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h index 522cafe26790..70965fc829d3 100644 --- a/include/linux/usb/gadget.h +++ b/include/linux/usb/gadget.h @@ -490,8 +490,7 @@ struct usb_gadget_ops { void (*get_config_params)(struct usb_dcd_config_params *); int (*udc_start)(struct usb_gadget *, struct usb_gadget_driver *); - int (*udc_stop)(struct usb_gadget *, - struct usb_gadget_driver *); + int (*udc_stop)(struct usb_gadget *); }; /** -- cgit v1.2.3 From 02e8c966274f1049cca8d3f17092f8275979b8eb Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Fri, 17 Oct 2014 18:57:06 -0500 Subject: usb: gadget: udc: core: prepend udc_attach_driver with usb_ No functional changes, just adding a prefix which should have been there from the start. Signed-off-by: Felipe Balbi --- include/linux/usb/gadget.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h index 70965fc829d3..70ddb3943b62 100644 --- a/include/linux/usb/gadget.h +++ b/include/linux/usb/gadget.h @@ -924,7 +924,7 @@ extern int usb_add_gadget_udc_release(struct device *parent, struct usb_gadget *gadget, void (*release)(struct device *dev)); extern int usb_add_gadget_udc(struct device *parent, struct usb_gadget *gadget); extern void usb_del_gadget_udc(struct usb_gadget *gadget); -extern int udc_attach_driver(const char *name, +extern int usb_udc_attach_driver(const char *name, struct usb_gadget_driver *driver); /*-------------------------------------------------------------------------*/ -- cgit v1.2.3 From e47d92545c2972bcf3711e7db80f481e402163c7 Mon Sep 17 00:00:00 2001 From: Antoine Tenart Date: Thu, 30 Oct 2014 18:41:13 +0100 Subject: usb: move the OTG state from the USB PHY to the OTG structure Before using the PHY framework instead of the USB PHY one, we need to move the OTG state into another place, since it won't be available when USB PHY isn't used. This patch moves the OTG state into the OTG structure, and makes all the needed modifications in the drivers using the OTG state. [ balbi@ti.com : fix build regressions with phy-tahvo.c, musb_dsps.c, phy-isp1301-omap, and chipidea's debug.c ] Acked-by: Kishon Vijay Abraham I Acked-by: Peter Chen Signed-off-by: Antoine Tenart Signed-off-by: Felipe Balbi --- include/linux/usb/otg.h | 2 ++ include/linux/usb/phy.h | 1 - 2 files changed, 2 insertions(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/usb/otg.h b/include/linux/usb/otg.h index 154332b7c8c0..33d3480c9cda 100644 --- a/include/linux/usb/otg.h +++ b/include/linux/usb/otg.h @@ -18,6 +18,8 @@ struct usb_otg { struct usb_bus *host; struct usb_gadget *gadget; + enum usb_otg_state state; + /* bind/unbind the host controller */ int (*set_host)(struct usb_otg *otg, struct usb_bus *host); diff --git a/include/linux/usb/phy.h b/include/linux/usb/phy.h index 353053a33f21..ac7d7913694f 100644 --- a/include/linux/usb/phy.h +++ b/include/linux/usb/phy.h @@ -77,7 +77,6 @@ struct usb_phy { unsigned int flags; enum usb_phy_type type; - enum usb_otg_state state; enum usb_phy_events last_event; struct usb_otg *otg; -- cgit v1.2.3 From 19c1eac2685b62640ca2386a0a885ac2152668c8 Mon Sep 17 00:00:00 2001 From: Antoine Tenart Date: Thu, 30 Oct 2014 18:41:14 +0100 Subject: usb: rename phy to usb_phy in OTG This patch prepares the introduction of the generic PHY support in the USB OTG common functions. The USB PHY member of the OTG structure is renamed to 'usb_phy' and modifications are done in all drivers accessing it. Renaming this pointer will allow to keep the compatibility for USB PHY drivers. Signed-off-by: Antoine Tenart Signed-off-by: Felipe Balbi --- include/linux/usb/otg.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/usb/otg.h b/include/linux/usb/otg.h index 33d3480c9cda..978fbbb0e266 100644 --- a/include/linux/usb/otg.h +++ b/include/linux/usb/otg.h @@ -14,7 +14,7 @@ struct usb_otg { u8 default_a; - struct usb_phy *phy; + struct usb_phy *usb_phy; struct usb_bus *host; struct usb_gadget *gadget; -- cgit v1.2.3 From 48bcc18076df4e07ef86226ac6ce795f64c84f7f Mon Sep 17 00:00:00 2001 From: Antoine Tenart Date: Thu, 30 Oct 2014 18:41:15 +0100 Subject: usb: add support to the generic PHY framework in OTG This patch adds support of the PHY framework in OTG and keeps the USB PHY compatibility. Here the only modification is to add PHY member in the OTG structure, along with the USB PHY one. Signed-off-by: Antoine Tenart Signed-off-by: Felipe Balbi --- include/linux/usb/otg.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/linux') diff --git a/include/linux/usb/otg.h b/include/linux/usb/otg.h index 978fbbb0e266..52661c5da690 100644 --- a/include/linux/usb/otg.h +++ b/include/linux/usb/otg.h @@ -9,11 +9,14 @@ #ifndef __LINUX_USB_OTG_H #define __LINUX_USB_OTG_H +#include #include struct usb_otg { u8 default_a; + struct phy *phy; + /* old usb_phy interface */ struct usb_phy *usb_phy; struct usb_bus *host; struct usb_gadget *gadget; -- cgit v1.2.3 From ef44cb4226d132146e44f8ea562a16b27ff61126 Mon Sep 17 00:00:00 2001 From: Antoine Tenart Date: Thu, 30 Oct 2014 18:41:16 +0100 Subject: usb: allow to supply the PHY in the drivers when using HCD This patch modify the generic code handling PHYs to allow them to be supplied from the drivers. This adds checks to ensure no PHY was already there when looking for one in the generic code. This also makes sure we do not modify its state in the generic HCD functions, it was provided by the driver. Signed-off-by: Antoine Tenart Acked-by: Alan Stern Signed-off-by: Felipe Balbi --- include/linux/usb/chipidea.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/usb/chipidea.h b/include/linux/usb/chipidea.h index e14c09a45c5a..4fe161a84c7d 100644 --- a/include/linux/usb/chipidea.h +++ b/include/linux/usb/chipidea.h @@ -13,7 +13,7 @@ struct ci_hdrc_platform_data { /* offset of the capability registers */ uintptr_t capoffset; unsigned power_budget; - struct usb_phy *phy; + struct usb_phy *usb_phy; enum usb_phy_interface phy_mode; unsigned long flags; #define CI_HDRC_REGS_SHARED BIT(0) -- cgit v1.2.3 From 1e5e2d3d055436c114e2f16145b83339aed024ff Mon Sep 17 00:00:00 2001 From: Antoine Tenart Date: Thu, 30 Oct 2014 18:41:19 +0100 Subject: usb: chipidea: add support to the generic PHY framework This patch adds support of the PHY framework for ChipIdea drivers. Changes are done in both the ChipIdea common code and in the drivers accessing the PHY. This is done by adding a new PHY member in ChipIdea's structures and by taking care of it in the code. Signed-off-by: Antoine Tenart Acked-by: Peter Chen Signed-off-by: Felipe Balbi --- include/linux/usb/chipidea.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/linux') diff --git a/include/linux/usb/chipidea.h b/include/linux/usb/chipidea.h index 4fe161a84c7d..c01bf4ea27b9 100644 --- a/include/linux/usb/chipidea.h +++ b/include/linux/usb/chipidea.h @@ -13,6 +13,8 @@ struct ci_hdrc_platform_data { /* offset of the capability registers */ uintptr_t capoffset; unsigned power_budget; + struct phy *phy; + /* old usb_phy interface */ struct usb_phy *usb_phy; enum usb_phy_interface phy_mode; unsigned long flags; -- cgit v1.2.3 From c53a2b512b6f2b9b1b6353c1587b8b069997852f Mon Sep 17 00:00:00 2001 From: Huang Rui Date: Fri, 31 Oct 2014 11:11:15 +0800 Subject: PCI: Add support for AMD Nolan USB3 DRD This patch adds PCI id for USB3 Dual-Role Device of AMD Nolan (NL) SoC. It will be used for PCI quirks and DWC3 device driver. Signed-off-by: Jason Chang Signed-off-by: Huang Rui Acked-by: Bjorn Helgaas Signed-off-by: Felipe Balbi --- include/linux/pci_ids.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h index 1fa99a301817..5decad77d8ed 100644 --- a/include/linux/pci_ids.h +++ b/include/linux/pci_ids.h @@ -562,6 +562,7 @@ #define PCI_DEVICE_ID_AMD_8131_BRIDGE 0x7450 #define PCI_DEVICE_ID_AMD_8131_APIC 0x7451 #define PCI_DEVICE_ID_AMD_8132_BRIDGE 0x7458 +#define PCI_DEVICE_ID_AMD_NL_USB 0x7912 #define PCI_DEVICE_ID_AMD_CS5535_IDE 0x208F #define PCI_DEVICE_ID_AMD_CS5536_ISA 0x2090 #define PCI_DEVICE_ID_AMD_CS5536_FLASH 0x2091 -- cgit v1.2.3 From f353d71f75394e518b4d939aea2030d8e239dd41 Mon Sep 17 00:00:00 2001 From: Masanari Iida Date: Wed, 22 Oct 2014 00:00:14 +0900 Subject: treewide: Fix typo in Documentation/DocBook/device-drivers This patch fix speeling typo found in html files within Documentation/DocBook/device-drivers. It is because html files are generated from comments in source, so I have to fix comments in the source. Signed-off-by: Masanari Iida Acked-by: Randy Dunlap Acked-by: Wolfram Sang Signed-off-by: Jonathan Corbet --- include/linux/fence.h | 4 ++-- include/linux/i2c.h | 2 +- 2 files changed, 3 insertions(+), 3 deletions(-) (limited to 'include/linux') diff --git a/include/linux/fence.h b/include/linux/fence.h index d174585b874b..39efee130d2b 100644 --- a/include/linux/fence.h +++ b/include/linux/fence.h @@ -128,8 +128,8 @@ struct fence_cb { * from irq context, so normal spinlocks can be used. * * A return value of false indicates the fence already passed, - * or some failure occured that made it impossible to enable - * signaling. True indicates succesful enabling. + * or some failure occurred that made it impossible to enable + * signaling. True indicates successful enabling. * * fence->status may be set in enable_signaling, but only when false is * returned. diff --git a/include/linux/i2c.h b/include/linux/i2c.h index b556e0ab946f..70ee0d3a2be3 100644 --- a/include/linux/i2c.h +++ b/include/linux/i2c.h @@ -359,7 +359,7 @@ i2c_register_board_info(int busnum, struct i2c_board_info const *info, * to name two of the most common. * * The return codes from the @master_xfer field should indicate the type of - * error code that occured during the transfer, as documented in the kernel + * error code that occurred during the transfer, as documented in the kernel * Documentation file Documentation/i2c/fault-codes. */ struct i2c_algorithm { -- cgit v1.2.3 From 4cdb1e2e3d3495423db558d3bb7ed11d66aabce7 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Sun, 2 Nov 2014 06:00:12 -0800 Subject: net: shrink struct softnet_data flow_limit in struct softnet_data is only read from local cpu and can be moved to fill a hole, reducing softnet_data size by 64 bytes on x86_64 While we are at it, move output_queue, output_queue_tailp and completion_queue, so that rx / tx paths touch a single cache line. Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller --- include/linux/netdevice.h | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) (limited to 'include/linux') diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index c85e06512246..5ed05bd764dc 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -2329,10 +2329,7 @@ extern int netdev_flow_limit_table_len; * Incoming packets are placed on per-cpu queues */ struct softnet_data { - struct Qdisc *output_queue; - struct Qdisc **output_queue_tailp; struct list_head poll_list; - struct sk_buff *completion_queue; struct sk_buff_head process_queue; /* stats */ @@ -2340,10 +2337,17 @@ struct softnet_data { unsigned int time_squeeze; unsigned int cpu_collision; unsigned int received_rps; - #ifdef CONFIG_RPS struct softnet_data *rps_ipi_list; +#endif +#ifdef CONFIG_NET_FLOW_LIMIT + struct sd_flow_limit __rcu *flow_limit; +#endif + struct Qdisc *output_queue; + struct Qdisc **output_queue_tailp; + struct sk_buff *completion_queue; +#ifdef CONFIG_RPS /* Elements below can be accessed between CPUs for RPS */ struct call_single_data csd ____cacheline_aligned_in_smp; struct softnet_data *rps_ipi_next; @@ -2355,9 +2359,6 @@ struct softnet_data { struct sk_buff_head input_pkt_queue; struct napi_struct backlog; -#ifdef CONFIG_NET_FLOW_LIMIT - struct sd_flow_limit __rcu *flow_limit; -#endif }; static inline void input_queue_head_incr(struct softnet_data *sd) -- cgit v1.2.3 From d475c95b4bcff983ac76e8522bfd2d29bcc567d0 Mon Sep 17 00:00:00 2001 From: Matan Barak Date: Sun, 2 Nov 2014 16:26:17 +0200 Subject: net/mlx4_core: Add retrieval of CONFIG_DEV parameters Add code to issue CONFIG_DEV "get" firmware command. This command is used in order to obtain certain parameters used for supporting various RX checksumming options and vxlan UDP port. The GET operation is allowed for VFs too. Signed-off-by: Matan Barak Signed-off-by: Shani Michaeli Signed-off-by: Or Gerlitz Signed-off-by: David S. Miller --- include/linux/mlx4/cmd.h | 29 +++++++++++++++++++++++++++++ include/linux/mlx4/device.h | 3 ++- 2 files changed, 31 insertions(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/mlx4/cmd.h b/include/linux/mlx4/cmd.h index ff5f5deb3dcf..64d25941b329 100644 --- a/include/linux/mlx4/cmd.h +++ b/include/linux/mlx4/cmd.h @@ -199,6 +199,33 @@ enum { MLX4_CMD_NATIVE }; +/* + * MLX4_RX_CSUM_MODE_VAL_NON_TCP_UDP - + * Receive checksum value is reported in CQE also for non TCP/UDP packets. + * + * MLX4_RX_CSUM_MODE_L4 - + * L4_CSUM bit in CQE, which indicates whether or not L4 checksum + * was validated correctly, is supported. + * + * MLX4_RX_CSUM_MODE_IP_OK_IP_NON_TCP_UDP - + * IP_OK CQE's field is supported also for non TCP/UDP IP packets. + * + * MLX4_RX_CSUM_MODE_MULTI_VLAN - + * Receive Checksum offload is supported for packets with more than 2 vlan headers. + */ +enum mlx4_rx_csum_mode { + MLX4_RX_CSUM_MODE_VAL_NON_TCP_UDP = 1UL << 0, + MLX4_RX_CSUM_MODE_L4 = 1UL << 1, + MLX4_RX_CSUM_MODE_IP_OK_IP_NON_TCP_UDP = 1UL << 2, + MLX4_RX_CSUM_MODE_MULTI_VLAN = 1UL << 3 +}; + +struct mlx4_config_dev_params { + u16 vxlan_udp_dport; + u8 rx_csum_flags_port_1; + u8 rx_csum_flags_port_2; +}; + struct mlx4_dev; struct mlx4_cmd_mailbox { @@ -250,6 +277,8 @@ int mlx4_set_vf_vlan(struct mlx4_dev *dev, int port, int vf, u16 vlan, u8 qos); int mlx4_set_vf_spoofchk(struct mlx4_dev *dev, int port, int vf, bool setting); int mlx4_get_vf_config(struct mlx4_dev *dev, int port, int vf, struct ifla_vf_info *ivf); int mlx4_set_vf_link_state(struct mlx4_dev *dev, int port, int vf, int link_state); +int mlx4_config_dev_retrieval(struct mlx4_dev *dev, + struct mlx4_config_dev_params *params); /* * mlx4_get_slave_default_vlan - * return true if VST ( default vlan) diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h index e4c136ebe79b..5cc5eac47d1b 100644 --- a/include/linux/mlx4/device.h +++ b/include/linux/mlx4/device.h @@ -188,7 +188,8 @@ enum { MLX4_DEV_CAP_FLAG2_CQE_STRIDE = 1LL << 12, MLX4_DEV_CAP_FLAG2_EQE_STRIDE = 1LL << 13, MLX4_DEV_CAP_FLAG2_ETH_PROT_CTRL = 1LL << 14, - MLX4_DEV_CAP_FLAG2_ETH_BACKPL_AN_REP = 1LL << 15 + MLX4_DEV_CAP_FLAG2_ETH_BACKPL_AN_REP = 1LL << 15, + MLX4_DEV_CAP_FLAG2_CONFIG_DEV = 1LL << 16 }; enum { -- cgit v1.2.3 From 946e51f2bf37f1656916eb75bd0742ba33983c28 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sun, 26 Oct 2014 19:19:16 -0400 Subject: move d_rcu from overlapping d_child to overlapping d_alias Signed-off-by: Al Viro --- include/linux/dcache.h | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'include/linux') diff --git a/include/linux/dcache.h b/include/linux/dcache.h index b2a2a08523bf..1c2f1b84468b 100644 --- a/include/linux/dcache.h +++ b/include/linux/dcache.h @@ -124,15 +124,15 @@ struct dentry { void *d_fsdata; /* fs-specific data */ struct list_head d_lru; /* LRU list */ + struct list_head d_child; /* child of parent list */ + struct list_head d_subdirs; /* our children */ /* - * d_child and d_rcu can share memory + * d_alias and d_rcu can share memory */ union { - struct list_head d_child; /* child of parent list */ + struct hlist_node d_alias; /* inode alias list */ struct rcu_head d_rcu; } d_u; - struct list_head d_subdirs; /* our children */ - struct hlist_node d_alias; /* inode alias list */ }; /* -- cgit v1.2.3 From 56b174256b6936ec4c1ed8f3407109ac6929d3ca Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Mon, 3 Nov 2014 08:19:53 -0800 Subject: net: add rbnode to struct sk_buff Yaogong replaces TCP out of order receive queue by an RB tree. As netem already does a private skb->{next/prev/tstamp} union with a 'struct rb_node', lets do this in a cleaner way. Signed-off-by: Eric Dumazet Cc: Yaogong Wang Signed-off-by: David S. Miller --- include/linux/skbuff.h | 20 +++++++++++++------- 1 file changed, 13 insertions(+), 7 deletions(-) (limited to 'include/linux') diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 6c8b6f604e76..5ad9675b6fe1 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -20,6 +20,7 @@ #include #include #include +#include #include #include @@ -440,6 +441,7 @@ static inline u32 skb_mstamp_us_delta(const struct skb_mstamp *t1, * @next: Next buffer in list * @prev: Previous buffer in list * @tstamp: Time we arrived/left + * @rbnode: RB tree node, alternative to next/prev for netem/tcp * @sk: Socket we are owned by * @dev: Device we arrived on/are leaving by * @cb: Control buffer. Free for use by every layer. Put private vars here @@ -504,15 +506,19 @@ static inline u32 skb_mstamp_us_delta(const struct skb_mstamp *t1, */ struct sk_buff { - /* These two members must be first. */ - struct sk_buff *next; - struct sk_buff *prev; - union { - ktime_t tstamp; - struct skb_mstamp skb_mstamp; + struct { + /* These two members must be first. */ + struct sk_buff *next; + struct sk_buff *prev; + + union { + ktime_t tstamp; + struct skb_mstamp skb_mstamp; + }; + }; + struct rb_node rbnode; /* used in netem & tcp stack */ }; - struct sock *sk; struct net_device *dev; -- cgit v1.2.3 From 98a18b6ffc79baa69f4a0d1bae58faf2a8aef4c8 Mon Sep 17 00:00:00 2001 From: Alexander Aring Date: Sun, 2 Nov 2014 06:44:54 +0100 Subject: netdevice: add ieee802154_ptr to net_device This patch adds an ieee802154_ptr to the net_device structure. Furthermore the 802.15.4 subsystem will introduce a nl802154 framework which is similar like the nl80211 framework and a wpan_dev structure. The wpan_dev structure will hold additional net_device attributes like address options which are 802.15.4 specific. In the upcoming nl802154 implementation we will introduce a NL802154_FLAG_NEED_WPAN_DEV like NL80211_FLAG_NEED_WDEV. For this flag an ieee802154_ptr in net_device is needed. Additional we can access the wpan_dev attributes in upper layers like IEEE 802.15.4 6LoWPAN easily. Current solution is a complicated callback interface and getting these values over subif data structure in mac802154. Signed-off-by: Alexander Aring Acked-by: David S. Miller Signed-off-by: Marcel Holtmann --- include/linux/netdevice.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/linux') diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 74fd5d37f15a..c9bcf33efb47 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -57,6 +57,8 @@ struct device; struct phy_device; /* 802.11 specific */ struct wireless_dev; +/* 802.15.4 specific */ +struct wpan_dev; void netdev_set_default_ethtool_ops(struct net_device *dev, const struct ethtool_ops *ops); @@ -1572,6 +1574,7 @@ struct net_device { struct inet6_dev __rcu *ip6_ptr; void *ax25_ptr; struct wireless_dev *ieee80211_ptr; + struct wpan_dev *ieee802154_ptr; /* * Cache lines mostly used on receive path (including eth_type_trans()) -- cgit v1.2.3 From 11a7e59405148c855e0a9d13588930ccec02c150 Mon Sep 17 00:00:00 2001 From: Michael Grzeschik Date: Mon, 13 Oct 2014 09:53:03 +0800 Subject: usb: ehci: add ehci_port_power interface The current EHCI implementation is prepared to toggle the PORT_POWER bit to enable or disable a USB-Port. In some cases this port power can not be just toggled by the PORT_POWER bit, and the gpio-regulator is needed to be toggled too. This patch defines a port power control interface ehci_port_power for ehci core use, it toggles PORT_POWER bit as well as calls platform defined .port_power if it is defined. Signed-off-by: Michael Grzeschik Signed-off-by: Peter Chen Acked-off-by: Alan Stern Signed-off-by: Greg Kroah-Hartman --- include/linux/usb/hcd.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/linux') diff --git a/include/linux/usb/hcd.h b/include/linux/usb/hcd.h index cd96a2bc3388..9cf7e3594609 100644 --- a/include/linux/usb/hcd.h +++ b/include/linux/usb/hcd.h @@ -379,6 +379,9 @@ struct hc_driver { int (*disable_usb3_lpm_timeout)(struct usb_hcd *, struct usb_device *, enum usb3_link_state state); int (*find_raw_port_number)(struct usb_hcd *, int); + /* Call for power on/off the port if necessary */ + int (*port_power)(struct usb_hcd *hcd, int portnum, bool enable); + }; static inline int hcd_giveback_urb_in_bh(struct usb_hcd *hcd) -- cgit v1.2.3 From a78186ebe516b6d7df43636603f0998803ab356a Mon Sep 17 00:00:00 2001 From: Jaegeuk Kim Date: Fri, 17 Oct 2014 17:57:29 -0700 Subject: f2fs: use highmem for directory pages This patch fixes to use highmem for directory pages. Signed-off-by: Jaegeuk Kim --- include/linux/f2fs_fs.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/f2fs_fs.h b/include/linux/f2fs_fs.h index 860313a33a43..6d7381b41304 100644 --- a/include/linux/f2fs_fs.h +++ b/include/linux/f2fs_fs.h @@ -33,7 +33,8 @@ #define F2FS_META_INO(sbi) (sbi->meta_ino_num) /* This flag is used by node and meta inodes, and by recovery */ -#define GFP_F2FS_ZERO (GFP_NOFS | __GFP_ZERO) +#define GFP_F2FS_ZERO (GFP_NOFS | __GFP_ZERO) +#define GFP_F2FS_HIGH_ZERO (GFP_NOFS | __GFP_ZERO | __GFP_HIGHMEM) /* * For further optimization on multi-head logs, on-disk layout supports maximum -- cgit v1.2.3 From 34d67debe02b3b2b035b5bdce0fab75800f9a344 Mon Sep 17 00:00:00 2001 From: Chao Yu Date: Wed, 24 Sep 2014 18:15:19 +0800 Subject: f2fs: add infra struct and helper for inline dir This patch defines macro/inline dentry structure, and adds some helpers for inline dir infrastructure. Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim --- include/linux/f2fs_fs.h | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) (limited to 'include/linux') diff --git a/include/linux/f2fs_fs.h b/include/linux/f2fs_fs.h index 6d7381b41304..63f8303b79ba 100644 --- a/include/linux/f2fs_fs.h +++ b/include/linux/f2fs_fs.h @@ -171,6 +171,7 @@ struct f2fs_extent { #define F2FS_INLINE_XATTR 0x01 /* file inline xattr flag */ #define F2FS_INLINE_DATA 0x02 /* file inline data flag */ +#define F2FS_INLINE_DENTRY 0x04 /* file inline dentry flag */ #define MAX_INLINE_DATA (sizeof(__le32) * (DEF_ADDRS_PER_INODE - \ F2FS_INLINE_XATTR_ADDRS - 1)) @@ -436,6 +437,24 @@ struct f2fs_dentry_block { __u8 filename[NR_DENTRY_IN_BLOCK][F2FS_SLOT_LEN]; } __packed; +/* for inline dir */ +#define NR_INLINE_DENTRY (MAX_INLINE_DATA * BITS_PER_BYTE / \ + ((SIZE_OF_DIR_ENTRY + F2FS_SLOT_LEN) * \ + BITS_PER_BYTE + 1)) +#define INLINE_DENTRY_BITMAP_SIZE ((NR_INLINE_DENTRY + \ + BITS_PER_BYTE - 1) / BITS_PER_BYTE) +#define INLINE_RESERVED_SIZE (MAX_INLINE_DATA - \ + ((SIZE_OF_DIR_ENTRY + F2FS_SLOT_LEN) * \ + NR_INLINE_DENTRY + INLINE_DENTRY_BITMAP_SIZE)) + +/* inline directory entry structure */ +struct f2fs_inline_dentry { + __u8 dentry_bitmap[INLINE_DENTRY_BITMAP_SIZE]; + __u8 reserved[INLINE_RESERVED_SIZE]; + struct f2fs_dir_entry dentry[NR_INLINE_DENTRY]; + __u8 filename[NR_INLINE_DENTRY][F2FS_SLOT_LEN]; +} __packed; + /* file types used in inode_info->flags */ enum { F2FS_FT_UNKNOWN, -- cgit v1.2.3 From c3377c2da6e594504c900d5ef72374c109e4ca99 Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Tue, 21 Oct 2014 07:53:02 -0700 Subject: rcu: Remove "cpu" argument to rcu_check_callbacks() The "cpu" argument was kept around on the off-chance that RCU might offload scheduler-clock interrupts. However, this offload approach has been replaced by NO_HZ_FULL, which offloads -all- RCU processing from qualifying CPUs. It is therefore time to remove the "cpu" argument to rcu_check_callbacks(), which this commit does. Signed-off-by: Paul E. McKenney Reviewed-by: Pranith Kumar --- include/linux/rcupdate.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h index a4a819ffb2d1..b4ad275d90d0 100644 --- a/include/linux/rcupdate.h +++ b/include/linux/rcupdate.h @@ -260,7 +260,7 @@ static inline int rcu_preempt_depth(void) void rcu_init(void); void rcu_sched_qs(void); void rcu_bh_qs(void); -void rcu_check_callbacks(int cpu, int user); +void rcu_check_callbacks(int user); struct notifier_block; void rcu_idle_enter(void); void rcu_idle_exit(void); -- cgit v1.2.3 From 38200cf24702e5d79ce6c8f4c62036c41845c62d Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Tue, 21 Oct 2014 12:50:04 -0700 Subject: rcu: Remove "cpu" argument to rcu_note_context_switch() The "cpu" argument to rcu_note_context_switch() is always the current CPU, so drop it. This in turn allows the "cpu" argument to rcu_preempt_note_context_switch() to be removed, which allows the sole use of "cpu" in both functions to be replaced with a this_cpu_ptr(). Again, the anticipated cross-CPU uses of these functions has been replaced by NO_HZ_FULL. Signed-off-by: Paul E. McKenney Reviewed-by: Pranith Kumar --- include/linux/rcutiny.h | 2 +- include/linux/rcutree.h | 4 ++-- 2 files changed, 3 insertions(+), 3 deletions(-) (limited to 'include/linux') diff --git a/include/linux/rcutiny.h b/include/linux/rcutiny.h index 38cc5b1e252d..0e5366200154 100644 --- a/include/linux/rcutiny.h +++ b/include/linux/rcutiny.h @@ -78,7 +78,7 @@ static inline void kfree_call_rcu(struct rcu_head *head, call_rcu(head, func); } -static inline void rcu_note_context_switch(int cpu) +static inline void rcu_note_context_switch(void) { rcu_sched_qs(); } diff --git a/include/linux/rcutree.h b/include/linux/rcutree.h index 3e2f5d432743..7b5484db1857 100644 --- a/include/linux/rcutree.h +++ b/include/linux/rcutree.h @@ -30,7 +30,7 @@ #ifndef __LINUX_RCUTREE_H #define __LINUX_RCUTREE_H -void rcu_note_context_switch(int cpu); +void rcu_note_context_switch(void); #ifndef CONFIG_RCU_NOCB_CPU_ALL int rcu_needs_cpu(int cpu, unsigned long *delta_jiffies); #endif /* #ifndef CONFIG_RCU_NOCB_CPU_ALL */ @@ -43,7 +43,7 @@ void rcu_cpu_stall_reset(void); */ static inline void rcu_virt_note_context_switch(int cpu) { - rcu_note_context_switch(cpu); + rcu_note_context_switch(); } void synchronize_rcu_bh(void); -- cgit v1.2.3 From aa6da5140b784ece799f670bf532096f67aa7785 Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Tue, 21 Oct 2014 13:23:08 -0700 Subject: rcu: Remove "cpu" argument to rcu_needs_cpu() The "cpu" argument to rcu_needs_cpu() is always the current CPU, so drop it. This in turn allows the "cpu" argument to rcu_cpu_has_callbacks() to be removed, which allows the uses of "cpu" in both functions to be replaced with a this_cpu_ptr(). Again, the anticipated cross-CPU uses of these functions has been replaced by NO_HZ_FULL. Signed-off-by: Paul E. McKenney Reviewed-by: Pranith Kumar --- include/linux/rcupdate.h | 2 +- include/linux/rcutree.h | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h index b4ad275d90d0..4eb810832b19 100644 --- a/include/linux/rcupdate.h +++ b/include/linux/rcupdate.h @@ -1103,7 +1103,7 @@ static inline notrace void rcu_read_unlock_sched_notrace(void) __kfree_rcu(&((ptr)->rcu_head), offsetof(typeof(*(ptr)), rcu_head)) #if defined(CONFIG_TINY_RCU) || defined(CONFIG_RCU_NOCB_CPU_ALL) -static inline int rcu_needs_cpu(int cpu, unsigned long *delta_jiffies) +static inline int rcu_needs_cpu(unsigned long *delta_jiffies) { *delta_jiffies = ULONG_MAX; return 0; diff --git a/include/linux/rcutree.h b/include/linux/rcutree.h index 7b5484db1857..52953790dcca 100644 --- a/include/linux/rcutree.h +++ b/include/linux/rcutree.h @@ -32,7 +32,7 @@ void rcu_note_context_switch(void); #ifndef CONFIG_RCU_NOCB_CPU_ALL -int rcu_needs_cpu(int cpu, unsigned long *delta_jiffies); +int rcu_needs_cpu(unsigned long *delta_jiffies); #endif /* #ifndef CONFIG_RCU_NOCB_CPU_ALL */ void rcu_cpu_stall_reset(void); -- cgit v1.2.3 From 36df04bc5273a046f53b5e359febc1225f85aa7b Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Wed, 29 Oct 2014 12:21:57 +0100 Subject: sched/wait: Reimplement wait_event_freezable() Provide better implementations of wait_event_freezable() APIs. The problem is with freezer_do_not_count(), it hides the thread from the freezer, even though this thread might not actually freeze/sleep at all. Cc: oleg@redhat.com Cc: Rafael Wysocki Signed-off-by: Peter Zijlstra (Intel) Cc: Len Brown Cc: Linus Torvalds Cc: Pavel Machek Cc: Rafael J. Wysocki Cc: linux-pm@vger.kernel.org Link: http://lkml.kernel.org/n/tip-d86fz1jmso9wjxa8jfpinp8o@git.kernel.org Signed-off-by: Ingo Molnar --- include/linux/freezer.h | 38 --------------------------------- include/linux/wait.h | 57 +++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 57 insertions(+), 38 deletions(-) (limited to 'include/linux') diff --git a/include/linux/freezer.h b/include/linux/freezer.h index 7fd81b8c4897..e203665c0faa 100644 --- a/include/linux/freezer.h +++ b/include/linux/freezer.h @@ -265,35 +265,6 @@ static inline int freezable_schedule_hrtimeout_range(ktime_t *expires, __retval; \ }) -#define wait_event_freezable(wq, condition) \ -({ \ - int __retval; \ - freezer_do_not_count(); \ - __retval = wait_event_interruptible(wq, (condition)); \ - freezer_count(); \ - __retval; \ -}) - -#define wait_event_freezable_timeout(wq, condition, timeout) \ -({ \ - long __retval = timeout; \ - freezer_do_not_count(); \ - __retval = wait_event_interruptible_timeout(wq, (condition), \ - __retval); \ - freezer_count(); \ - __retval; \ -}) - -#define wait_event_freezable_exclusive(wq, condition) \ -({ \ - int __retval; \ - freezer_do_not_count(); \ - __retval = wait_event_interruptible_exclusive(wq, condition); \ - freezer_count(); \ - __retval; \ -}) - - #else /* !CONFIG_FREEZER */ static inline bool frozen(struct task_struct *p) { return false; } static inline bool freezing(struct task_struct *p) { return false; } @@ -331,15 +302,6 @@ static inline void set_freezable(void) {} #define freezable_schedule_hrtimeout_range(expires, delta, mode) \ schedule_hrtimeout_range(expires, delta, mode) -#define wait_event_freezable(wq, condition) \ - wait_event_interruptible(wq, condition) - -#define wait_event_freezable_timeout(wq, condition, timeout) \ - wait_event_interruptible_timeout(wq, condition, timeout) - -#define wait_event_freezable_exclusive(wq, condition) \ - wait_event_interruptible_exclusive(wq, condition) - #define wait_event_freezekillable(wq, condition) \ wait_event_killable(wq, condition) diff --git a/include/linux/wait.h b/include/linux/wait.h index 0421775e0b9f..2232ed16635a 100644 --- a/include/linux/wait.h +++ b/include/linux/wait.h @@ -267,6 +267,31 @@ do { \ __wait_event(wq, condition); \ } while (0) +#define __wait_event_freezable(wq, condition) \ + ___wait_event(wq, condition, TASK_INTERRUPTIBLE, 0, 0, \ + schedule(); try_to_freeze()) + +/** + * wait_event - sleep (or freeze) until a condition gets true + * @wq: the waitqueue to wait on + * @condition: a C expression for the event to wait for + * + * The process is put to sleep (TASK_INTERRUPTIBLE -- so as not to contribute + * to system load) until the @condition evaluates to true. The + * @condition is checked each time the waitqueue @wq is woken up. + * + * wake_up() has to be called after changing any variable that could + * change the result of the wait condition. + */ +#define wait_event_freezable(wq, condition) \ +({ \ + int __ret = 0; \ + might_sleep(); \ + if (!(condition)) \ + __ret = __wait_event_freezable(wq, condition); \ + __ret; \ +}) + #define __wait_event_timeout(wq, condition, timeout) \ ___wait_event(wq, ___wait_cond_timeout(condition), \ TASK_UNINTERRUPTIBLE, 0, timeout, \ @@ -300,6 +325,24 @@ do { \ __ret; \ }) +#define __wait_event_freezable_timeout(wq, condition, timeout) \ + ___wait_event(wq, ___wait_cond_timeout(condition), \ + TASK_INTERRUPTIBLE, 0, timeout, \ + __ret = schedule_timeout(__ret); try_to_freeze()) + +/* + * like wait_event_timeout() -- except it uses TASK_INTERRUPTIBLE to avoid + * increasing load and is freezable. + */ +#define wait_event_freezable_timeout(wq, condition, timeout) \ +({ \ + long __ret = timeout; \ + might_sleep(); \ + if (!___wait_cond_timeout(condition)) \ + __ret = __wait_event_freezable_timeout(wq, condition, timeout); \ + __ret; \ +}) + #define __wait_event_cmd(wq, condition, cmd1, cmd2) \ (void)___wait_event(wq, condition, TASK_UNINTERRUPTIBLE, 0, 0, \ cmd1; schedule(); cmd2) @@ -480,6 +523,20 @@ do { \ }) +#define __wait_event_freezable_exclusive(wq, condition) \ + ___wait_event(wq, condition, TASK_INTERRUPTIBLE, 1, 0, \ + schedule(); try_to_freeze()) + +#define wait_event_freezable_exclusive(wq, condition) \ +({ \ + int __ret = 0; \ + might_sleep(); \ + if (!(condition)) \ + __ret = __wait_event_freezable_exclusive(wq, condition);\ + __ret; \ +}) + + #define __wait_event_interruptible_locked(wq, condition, exclusive, irq) \ ({ \ int __ret = 0; \ -- cgit v1.2.3 From 5d4d56582467f3c08dfedd0d995ce2092f384ecc Mon Sep 17 00:00:00 2001 From: "Peter Zijlstra (Intel)" Date: Wed, 29 Oct 2014 14:48:13 +0100 Subject: sched/wait: Remove wait_event_freezekillable() There is no user.. make it go away. Signed-off-by: Peter Zijlstra (Intel) Cc: oleg@redhat.com Cc: Rafael Wysocki Cc: Len Brown Cc: Linus Torvalds Cc: Pavel Machek Cc: linux-pm@vger.kernel.org Signed-off-by: Ingo Molnar --- include/linux/freezer.h | 12 ------------ 1 file changed, 12 deletions(-) (limited to 'include/linux') diff --git a/include/linux/freezer.h b/include/linux/freezer.h index e203665c0faa..6b7fd9cf5ea2 100644 --- a/include/linux/freezer.h +++ b/include/linux/freezer.h @@ -246,15 +246,6 @@ static inline int freezable_schedule_hrtimeout_range(ktime_t *expires, * defined in */ -#define wait_event_freezekillable(wq, condition) \ -({ \ - int __retval; \ - freezer_do_not_count(); \ - __retval = wait_event_killable(wq, (condition)); \ - freezer_count(); \ - __retval; \ -}) - /* DO NOT ADD ANY NEW CALLERS OF THIS FUNCTION */ #define wait_event_freezekillable_unsafe(wq, condition) \ ({ \ @@ -302,9 +293,6 @@ static inline void set_freezable(void) {} #define freezable_schedule_hrtimeout_range(expires, delta, mode) \ schedule_hrtimeout_range(expires, delta, mode) -#define wait_event_freezekillable(wq, condition) \ - wait_event_killable(wq, condition) - #define wait_event_freezekillable_unsafe(wq, condition) \ wait_event_killable(wq, condition) -- cgit v1.2.3 From 44dba3d5d6a10685fb15bd1954e62016334825e0 Mon Sep 17 00:00:00 2001 From: Iulia Manda Date: Fri, 31 Oct 2014 02:13:31 +0200 Subject: sched: Refactor task_struct to use numa_faults instead of numa_* pointers This patch simplifies task_struct by removing the four numa_* pointers in the same array and replacing them with the array pointer. By doing this, on x86_64, the size of task_struct is reduced by 3 ulong pointers (24 bytes on x86_64). A new parameter is added to the task_faults_idx function so that it can return an index to the correct offset, corresponding with the old precalculated pointers. All of the code in sched/ that depended on task_faults_idx and numa_* was changed in order to match the new logic. Signed-off-by: Iulia Manda Signed-off-by: Peter Zijlstra (Intel) Cc: mgorman@suse.de Cc: dave@stgolabs.net Cc: riel@redhat.com Cc: Linus Torvalds Link: http://lkml.kernel.org/r/20141031001331.GA30662@winterfell Signed-off-by: Ingo Molnar --- include/linux/sched.h | 31 +++++++++++++------------------ 1 file changed, 13 insertions(+), 18 deletions(-) (limited to 'include/linux') diff --git a/include/linux/sched.h b/include/linux/sched.h index 4400ddc2fe73..bd7c14ba86c4 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1597,27 +1597,22 @@ struct task_struct { struct numa_group *numa_group; /* - * Exponential decaying average of faults on a per-node basis. - * Scheduling placement decisions are made based on the these counts. - * The values remain static for the duration of a PTE scan + * numa_faults is an array split into four regions: + * faults_memory, faults_cpu, faults_memory_buffer, faults_cpu_buffer + * in this precise order. + * + * faults_memory: Exponential decaying average of faults on a per-node + * basis. Scheduling placement decisions are made based on these + * counts. The values remain static for the duration of a PTE scan. + * faults_cpu: Track the nodes the process was running on when a NUMA + * hinting fault was incurred. + * faults_memory_buffer and faults_cpu_buffer: Record faults per node + * during the current scan window. When the scan completes, the counts + * in faults_memory and faults_cpu decay and these values are copied. */ - unsigned long *numa_faults_memory; + unsigned long *numa_faults; unsigned long total_numa_faults; - /* - * numa_faults_buffer records faults per node during the current - * scan window. When the scan completes, the counts in - * numa_faults_memory decay and these values are copied. - */ - unsigned long *numa_faults_buffer_memory; - - /* - * Track the nodes the process was running on when a NUMA hinting - * fault was incurred. - */ - unsigned long *numa_faults_cpu; - unsigned long *numa_faults_buffer_cpu; - /* * numa_faults_locality tracks if faults recorded during the last * scan window were remote/local. The task scan period is adapted -- cgit v1.2.3 From 0563921abf01a7a38b5f670c3de05dc0b0b8617d Mon Sep 17 00:00:00 2001 From: Eran Harary Date: Mon, 3 Nov 2014 20:06:47 +0200 Subject: ieee80211: add "max length of AMPDU" enum for VHT Maximum length of AMPDU that an STA can receive in VHT. length = 2 ^ (13 + max_ampdu_length_exp) - 1. Signed-off-by: Eran Harary Signed-off-by: Emmanuel Grumbach Signed-off-by: Johannes Berg --- include/linux/ieee80211.h | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h index 5fab17b382b5..f65b5446d983 100644 --- a/include/linux/ieee80211.h +++ b/include/linux/ieee80211.h @@ -1274,7 +1274,7 @@ struct ieee80211_ht_cap { #define IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT 2 /* - * Maximum length of AMPDU that the STA can receive. + * Maximum length of AMPDU that the STA can receive in high-throughput (HT). * Length = 2 ^ (13 + max_ampdu_length_exp) - 1 (octets) */ enum ieee80211_max_ampdu_length_exp { @@ -1284,6 +1284,21 @@ enum ieee80211_max_ampdu_length_exp { IEEE80211_HT_MAX_AMPDU_64K = 3 }; +/* + * Maximum length of AMPDU that the STA can receive in VHT. + * Length = 2 ^ (13 + max_ampdu_length_exp) - 1 (octets) + */ +enum ieee80211_vht_max_ampdu_length_exp { + IEEE80211_VHT_MAX_AMPDU_8K = 0, + IEEE80211_VHT_MAX_AMPDU_16K = 1, + IEEE80211_VHT_MAX_AMPDU_32K = 2, + IEEE80211_VHT_MAX_AMPDU_64K = 3, + IEEE80211_VHT_MAX_AMPDU_128K = 4, + IEEE80211_VHT_MAX_AMPDU_256K = 5, + IEEE80211_VHT_MAX_AMPDU_512K = 6, + IEEE80211_VHT_MAX_AMPDU_1024K = 7 +}; + #define IEEE80211_HT_MAX_AMPDU_FACTOR 13 /* Minimum MPDU start spacing */ -- cgit v1.2.3 From e7a00e4210e4cc980e3ba67ec7301af54061d14b Mon Sep 17 00:00:00 2001 From: Sebastian Reichel Date: Sun, 6 Apr 2014 12:52:11 +0200 Subject: of: introduce of_property_read_s32 Introduce signed 32bit integer of_property_read method. Signed-off-by: Sebastian Reichel Signed-off-by: Grant Likely --- include/linux/of.h | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'include/linux') diff --git a/include/linux/of.h b/include/linux/of.h index 29f0adc5f3e4..30912939a610 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -760,6 +760,13 @@ static inline int of_property_read_u32(const struct device_node *np, return of_property_read_u32_array(np, propname, out_value, 1); } +static inline int of_property_read_s32(const struct device_node *np, + const char *propname, + s32 *out_value) +{ + return of_property_read_u32(np, propname, (u32*) out_value); +} + #define of_property_for_each_u32(np, propname, prop, p, u) \ for (prop = of_find_property(np, propname, NULL), \ p = of_prop_next_u32(prop, NULL, &u); \ -- cgit v1.2.3 From 5063e25a302e6a83f6590d9a06bd5f6400b17430 Mon Sep 17 00:00:00 2001 From: Grant Likely Date: Fri, 3 Oct 2014 16:28:27 +0100 Subject: of: Eliminate of_allnodes list The device tree structure is composed of two lists; the 'allnodes' list which is a singly linked list containing every node in the tree, and the child->parent structure where each parent node has a singly linked list of children. All of the data in the allnodes list can be easily reproduced with the parent-child lists, so of_allnodes is actually unnecessary. Remove it entirely which saves a bit of memory and simplifies the data structure quite a lot. Signed-off-by: Grant Likely Cc: Rob Herring Cc: Gaurav Minocha Cc: Pantelis Antoniou --- include/linux/of.h | 11 ++++++----- include/linux/of_pdt.h | 3 +-- 2 files changed, 7 insertions(+), 7 deletions(-) (limited to 'include/linux') diff --git a/include/linux/of.h b/include/linux/of.h index 30912939a610..f54da3b699a8 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -56,7 +56,6 @@ struct device_node { struct device_node *child; struct device_node *sibling; struct device_node *next; /* next device of same type */ - struct device_node *allnext; /* next in list of all nodes */ struct kobject kobj; unsigned long _flags; void *data; @@ -108,7 +107,7 @@ static inline void of_node_put(struct device_node *node) { } #ifdef CONFIG_OF /* Pointer for first entry in chain of all nodes. */ -extern struct device_node *of_allnodes; +extern struct device_node *of_root; extern struct device_node *of_chosen; extern struct device_node *of_aliases; extern struct device_node *of_stdout; @@ -116,7 +115,7 @@ extern raw_spinlock_t devtree_lock; static inline bool of_have_populated_dt(void) { - return of_allnodes != NULL; + return of_root != NULL; } static inline bool of_node_is_root(const struct device_node *node) @@ -160,6 +159,7 @@ static inline void of_property_clear_flag(struct property *p, unsigned long flag clear_bit(flag, &p->_flags); } +extern struct device_node *__of_find_all_nodes(struct device_node *prev); extern struct device_node *of_find_all_nodes(struct device_node *prev); /* @@ -215,8 +215,9 @@ static inline const char *of_node_full_name(const struct device_node *np) return np ? np->full_name : ""; } -#define for_each_of_allnodes(dn) \ - for (dn = of_allnodes; dn; dn = dn->allnext) +#define for_each_of_allnodes_from(from, dn) \ + for (dn = __of_find_all_nodes(from); dn; dn = __of_find_all_nodes(dn)) +#define for_each_of_allnodes(dn) for_each_of_allnodes_from(NULL, dn) extern struct device_node *of_find_node_by_name(struct device_node *from, const char *name); extern struct device_node *of_find_node_by_type(struct device_node *from, diff --git a/include/linux/of_pdt.h b/include/linux/of_pdt.h index c65a18a0cfdf..7e09244bb679 100644 --- a/include/linux/of_pdt.h +++ b/include/linux/of_pdt.h @@ -39,7 +39,6 @@ extern void *prom_early_alloc(unsigned long size); /* for building the device tree */ extern void of_pdt_build_devicetree(phandle root_node, struct of_pdt_ops *ops); -extern void (*of_pdt_build_more)(struct device_node *dp, - struct device_node ***nextp); +extern void (*of_pdt_build_more)(struct device_node *dp); #endif /* _LINUX_OF_PDT_H */ -- cgit v1.2.3 From b75b276bead4850c86e60747babe09be5c13d4d1 Mon Sep 17 00:00:00 2001 From: Matthias Brugger Date: Tue, 21 Oct 2014 18:27:25 +0200 Subject: of: Request and map make argument name constant This patch makes the name argument from of_io_request_and_map constant. Signed-off-by: Matthias Brugger Signed-off-by: Grant Likely --- include/linux/of_address.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/of_address.h b/include/linux/of_address.h index 8cb14eb393d6..d88e81be6368 100644 --- a/include/linux/of_address.h +++ b/include/linux/of_address.h @@ -106,7 +106,7 @@ extern int of_address_to_resource(struct device_node *dev, int index, struct resource *r); void __iomem *of_iomap(struct device_node *node, int index); void __iomem *of_io_request_and_map(struct device_node *device, - int index, char *name); + int index, const char *name); #else #include @@ -123,7 +123,7 @@ static inline void __iomem *of_iomap(struct device_node *device, int index) } static inline void __iomem *of_io_request_and_map(struct device_node *device, - int index, char *name) + int index, const char *name) { return IOMEM_ERR_PTR(-EINVAL); } -- cgit v1.2.3 From 5f563585ab0afa8c35b3627d65c07966f7a5080e Mon Sep 17 00:00:00 2001 From: Thierry Reding Date: Thu, 2 Oct 2014 16:01:10 +0200 Subject: of: Fix padding in _OF_DECLARE macro definition Signed-off-by: Thierry Reding Signed-off-by: Grant Likely --- include/linux/of.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/of.h b/include/linux/of.h index f54da3b699a8..3c851a8f23eb 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -836,7 +836,7 @@ static inline int of_get_available_child_count(const struct device_node *np) = { .compatible = compat, \ .data = (fn == (fn_type)NULL) ? fn : fn } #else -#define _OF_DECLARE(table, name, compat, fn, fn_type) \ +#define _OF_DECLARE(table, name, compat, fn, fn_type) \ static const struct of_device_id __of_table_##name \ __attribute__((unused)) \ = { .compatible = compat, \ -- cgit v1.2.3 From 0d8a52f933f817d0b62955a5a362fb7f2508f06c Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Tue, 4 Nov 2014 11:55:09 +0300 Subject: ieee802154: || vs && in ieee802154_is_valid_extended_addr() The ieee802154_is_valid_extended_addr() always returns true because there is a typo. The || should be &&. Neither 0x0000000000000000ULL nor 0xffffffffffffffffULL are valid addresses. Signed-off-by: Dan Carpenter Acked-by: Alexander Aring Signed-off-by: Marcel Holtmann --- include/linux/ieee802154.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/ieee802154.h b/include/linux/ieee802154.h index 5d9e7459d94b..4c032863cd71 100644 --- a/include/linux/ieee802154.h +++ b/include/linux/ieee802154.h @@ -209,7 +209,7 @@ static inline bool ieee802154_is_valid_extended_addr(const __le64 addr) * This is currently a workaround because neighbor discovery can't * deal with short addresses types right now. */ - return ((addr != cpu_to_le64(0x0000000000000000ULL)) || + return ((addr != cpu_to_le64(0x0000000000000000ULL)) && (addr != cpu_to_le64(0xffffffffffffffffULL))); } -- cgit v1.2.3 From 6fccf9383b280d463a7dfe1e0d048aff8df8a25e Mon Sep 17 00:00:00 2001 From: Keith Busch Date: Wed, 18 Jun 2014 13:58:57 -0600 Subject: NVMe: Async event request Submits NVMe asynchronous event requests, one event up to the controller maximum or number of possible different event types (8), whichever is smaller. Events successfully returned by the controller are logged. Signed-off-by: Keith Busch Signed-off-by: Matthew Wilcox Signed-off-by: Jens Axboe --- include/linux/nvme.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/nvme.h b/include/linux/nvme.h index 2bf403195c09..974efd04a4b1 100644 --- a/include/linux/nvme.h +++ b/include/linux/nvme.h @@ -99,6 +99,7 @@ struct nvme_dev { u32 stripe_size; u16 oncs; u16 abort_limit; + u8 event_limit; u8 vwc; u8 initialized; }; -- cgit v1.2.3 From 1d0906246095184d1624c643c2088152d330c40a Mon Sep 17 00:00:00 2001 From: Keith Busch Date: Mon, 23 Jun 2014 11:34:01 -0600 Subject: NVMe: Mismatched host/device page size support Adds support for devices with max page size smaller than the host's. In the case we encounter such a host/device combination, the driver will split a page into as many PRP entries as necessary for the device's page size capabilities. If the device's reported minimum page size is greater than the host's, the driver will not attempt to enable the device and return an error instead. Signed-off-by: Keith Busch Signed-off-by: Matthew Wilcox Signed-off-by: Jens Axboe --- include/linux/nvme.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/linux') diff --git a/include/linux/nvme.h b/include/linux/nvme.h index 974efd04a4b1..ed09074e5554 100644 --- a/include/linux/nvme.h +++ b/include/linux/nvme.h @@ -38,6 +38,7 @@ struct nvme_bar { #define NVME_CAP_TIMEOUT(cap) (((cap) >> 24) & 0xff) #define NVME_CAP_STRIDE(cap) (((cap) >> 32) & 0xf) #define NVME_CAP_MPSMIN(cap) (((cap) >> 48) & 0xf) +#define NVME_CAP_MPSMAX(cap) (((cap) >> 52) & 0xf) enum { NVME_CC_ENABLE = 1 << 0, @@ -97,6 +98,7 @@ struct nvme_dev { char firmware_rev[8]; u32 max_hw_sectors; u32 stripe_size; + u32 page_size; u16 oncs; u16 abort_limit; u8 event_limit; -- cgit v1.2.3 From a4aea5623d4a54682b6ff5c18196d7802f3e478f Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Matias=20Bj=C3=B8rling?= Date: Tue, 4 Nov 2014 08:20:14 -0700 Subject: NVMe: Convert to blk-mq This converts the NVMe driver to a blk-mq request-based driver. The NVMe driver is currently bio-based and implements queue logic within itself. By using blk-mq, a lot of these responsibilities can be moved and simplified. The patch is divided into the following blocks: * Per-command data and cmdid have been moved into the struct request field. The cmdid_data can be retrieved using blk_mq_rq_to_pdu() and id maintenance are now handled by blk-mq through the rq->tag field. * The logic for splitting bio's has been moved into the blk-mq layer. The driver instead notifies the block layer about limited gap support in SG lists. * blk-mq handles timeouts and is reimplemented within nvme_timeout(). This both includes abort handling and command cancelation. * Assignment of nvme queues to CPUs are replaced with the blk-mq version. The current blk-mq strategy is to assign the number of mapped queues and CPUs to provide synergy, while the nvme driver assign as many nvme hw queues as possible. This can be implemented in blk-mq if needed. * NVMe queues are merged with the tags structure of blk-mq. * blk-mq takes care of setup/teardown of nvme queues and guards invalid accesses. Therefore, RCU-usage for nvme queues can be removed. * IO tracing and accounting are handled by blk-mq and therefore removed. * Queue suspension logic is replaced with the logic from the block layer. Contributions in this patch from: Sam Bradshaw Jens Axboe Keith Busch Robert Nelson Acked-by: Keith Busch Acked-by: Jens Axboe Updated for new ->queue_rq() prototype. Signed-off-by: Jens Axboe --- include/linux/nvme.h | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) (limited to 'include/linux') diff --git a/include/linux/nvme.h b/include/linux/nvme.h index ed09074e5554..258945fcabf1 100644 --- a/include/linux/nvme.h +++ b/include/linux/nvme.h @@ -19,6 +19,7 @@ #include #include #include +#include struct nvme_bar { __u64 cap; /* Controller Capabilities */ @@ -71,8 +72,10 @@ extern unsigned char nvme_io_timeout; */ struct nvme_dev { struct list_head node; - struct nvme_queue __rcu **queues; - unsigned short __percpu *io_queue; + struct nvme_queue **queues; + struct request_queue *admin_q; + struct blk_mq_tag_set tagset; + struct blk_mq_tag_set admin_tagset; u32 __iomem *dbs; struct pci_dev *pci_dev; struct dma_pool *prp_page_pool; @@ -91,7 +94,6 @@ struct nvme_dev { struct miscdevice miscdev; work_func_t reset_workfn; struct work_struct reset_work; - struct work_struct cpu_work; char name[12]; char serial[20]; char model[40]; @@ -135,7 +137,6 @@ struct nvme_iod { int offset; /* Of PRP list */ int nents; /* Used in scatterlist */ int length; /* Of data, in bytes */ - unsigned long start_time; dma_addr_t first_dma; struct list_head node; struct scatterlist sg[0]; @@ -153,12 +154,14 @@ static inline u64 nvme_block_nr(struct nvme_ns *ns, sector_t sector) */ void nvme_free_iod(struct nvme_dev *dev, struct nvme_iod *iod); -int nvme_setup_prps(struct nvme_dev *, struct nvme_iod *, int , gfp_t); +int nvme_setup_prps(struct nvme_dev *, struct nvme_iod *, int, gfp_t); struct nvme_iod *nvme_map_user_pages(struct nvme_dev *dev, int write, unsigned long addr, unsigned length); void nvme_unmap_user_pages(struct nvme_dev *dev, int write, struct nvme_iod *iod); -int nvme_submit_io_cmd(struct nvme_dev *, struct nvme_command *, u32 *); +int nvme_submit_io_cmd(struct nvme_dev *, struct nvme_ns *, + struct nvme_command *, u32 *); +int nvme_submit_flush_data(struct nvme_queue *nvmeq, struct nvme_ns *ns); int nvme_submit_admin_cmd(struct nvme_dev *, struct nvme_command *, u32 *result); int nvme_identify(struct nvme_dev *, unsigned nsid, unsigned cns, -- cgit v1.2.3 From ffdcd955c3078af3ce117edcfce80fde1a512bed Mon Sep 17 00:00:00 2001 From: Mika Westerberg Date: Tue, 21 Oct 2014 13:33:55 +0200 Subject: ACPI: Add support for device specific properties Device Tree is used in many embedded systems to describe the system configuration to the OS. It supports attaching properties or name-value pairs to the devices it describe. With these properties one can pass additional information to the drivers that would not be available otherwise. ACPI is another configuration mechanism (among other things) typically seen, but not limited to, x86 machines. ACPI allows passing arbitrary data from methods but there has not been mechanism equivalent to Device Tree until the introduction of _DSD in the recent publication of the ACPI 5.1 specification. In order to facilitate ACPI usage in systems where Device Tree is typically used, it would be beneficial to standardize a way to retrieve Device Tree style properties from ACPI devices, which is what we do in this patch. If a given device described in ACPI namespace wants to export properties it must implement _DSD method (Device Specific Data, introduced with ACPI 5.1) that returns the properties in a package of packages. For example: Name (_DSD, Package () { ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"), Package () { Package () {"name1", }, Package () {"name2", }, ... } }) The UUID reserved for properties is daffd814-6eba-4d8c-8a91-bc9bbf4aa301 and is documented in the ACPI 5.1 companion document called "_DSD Implementation Guide" [1], [2]. We add several helper functions that can be used to extract these properties and convert them to different Linux data types. The ultimate goal is that we only have one device property API that retrieves the requested properties from Device Tree or from ACPI transparent to the caller. [1] http://www.uefi.org/sites/default/files/resources/_DSD-implementation-guide-toplevel.htm [2] http://www.uefi.org/sites/default/files/resources/_DSD-device-properties-UUID.pdf Reviewed-by: Hanjun Guo Reviewed-by: Josh Triplett Reviewed-by: Grant Likely Signed-off-by: Darren Hart Signed-off-by: Rafael J. Wysocki Signed-off-by: Mika Westerberg Signed-off-by: Rafael J. Wysocki --- include/linux/acpi.h | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) (limited to 'include/linux') diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 407a12f663eb..dcdf8738898c 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -659,4 +659,44 @@ do { \ #endif #endif +/* Device properties */ + +#define MAX_ACPI_REFERENCE_ARGS 8 +struct acpi_reference_args { + struct acpi_device *adev; + size_t nargs; + u64 args[MAX_ACPI_REFERENCE_ARGS]; +}; + +#ifdef CONFIG_ACPI +int acpi_dev_get_property(struct acpi_device *adev, const char *name, + acpi_object_type type, const union acpi_object **obj); +int acpi_dev_get_property_array(struct acpi_device *adev, const char *name, + acpi_object_type type, + const union acpi_object **obj); +int acpi_dev_get_property_reference(struct acpi_device *adev, const char *name, + const char *cells_name, size_t index, + struct acpi_reference_args *args); +#else +static inline int acpi_dev_get_property(struct acpi_device *adev, + const char *name, acpi_object_type type, + const union acpi_object **obj) +{ + return -ENXIO; +} +static inline int acpi_dev_get_property_array(struct acpi_device *adev, + const char *name, + acpi_object_type type, + const union acpi_object **obj) +{ + return -ENXIO; +} +static inline int acpi_dev_get_property_reference(struct acpi_device *adev, + const char *name, const char *cells_name, + size_t index, struct acpi_reference_args *args) +{ + return -ENXIO; +} +#endif + #endif /*_LINUX_ACPI_H*/ -- cgit v1.2.3 From b31384fa5de37a100507751dfb5c0a49d06cee67 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Tue, 4 Nov 2014 01:28:56 +0100 Subject: Driver core: Unified device properties interface for platform firmware Add a uniform interface by which device drivers can request device properties from the platform firmware by providing a property name and the corresponding data type. The purpose of it is to help to write portable code that won't depend on any particular platform firmware interface. The following general helper functions are added: device_property_present() device_property_read_u8() device_property_read_u16() device_property_read_u32() device_property_read_u64() device_property_read_string() device_property_read_u8_array() device_property_read_u16_array() device_property_read_u32_array() device_property_read_u64_array() device_property_read_string_array() The first one allows the caller to check if the given property is present. The next 5 of them allow single-valued properties of various types to be retrieved in a uniform way. The remaining 5 are for reading properties with multiple values (arrays of either numbers or strings). The interface covers both ACPI and Device Trees. This change set includes material from Mika Westerberg and Aaron Lu. Signed-off-by: Aaron Lu Signed-off-by: Mika Westerberg Acked-by: Greg Kroah-Hartman Acked-by: Grant Likely Signed-off-by: Rafael J. Wysocki --- include/linux/acpi.h | 32 +++++++++++++++++++++ include/linux/of.h | 12 ++++++++ include/linux/property.h | 73 ++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 117 insertions(+) create mode 100644 include/linux/property.h (limited to 'include/linux') diff --git a/include/linux/acpi.h b/include/linux/acpi.h index dcdf8738898c..76d64d6a903a 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -28,6 +28,7 @@ #include #include /* for struct resource */ #include +#include #ifndef _LINUX #define _LINUX @@ -677,6 +678,13 @@ int acpi_dev_get_property_array(struct acpi_device *adev, const char *name, int acpi_dev_get_property_reference(struct acpi_device *adev, const char *name, const char *cells_name, size_t index, struct acpi_reference_args *args); + +int acpi_dev_prop_get(struct acpi_device *adev, const char *propname, + void **valptr); +int acpi_dev_prop_read_single(struct acpi_device *adev, const char *propname, + enum dev_prop_type proptype, void *val); +int acpi_dev_prop_read(struct acpi_device *adev, const char *propname, + enum dev_prop_type proptype, void *val, size_t nval); #else static inline int acpi_dev_get_property(struct acpi_device *adev, const char *name, acpi_object_type type, @@ -697,6 +705,30 @@ static inline int acpi_dev_get_property_reference(struct acpi_device *adev, { return -ENXIO; } + +static inline int acpi_dev_prop_get(struct acpi_device *adev, + const char *propname, + void **valptr) +{ + return -ENXIO; +} + +static inline int acpi_dev_prop_read_single(struct acpi_device *adev, + const char *propname, + enum dev_prop_type proptype, + void *val) +{ + return -ENXIO; +} + +static inline int acpi_dev_prop_read(struct acpi_device *adev, + const char *propname, + enum dev_prop_type proptype, + void *val, size_t nval) +{ + return -ENXIO; +} + #endif #endif /*_LINUX_ACPI_H*/ diff --git a/include/linux/of.h b/include/linux/of.h index 29f0adc5f3e4..ce9f6a2b3532 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -23,6 +23,7 @@ #include #include #include +#include #include #include @@ -263,6 +264,10 @@ extern int of_property_read_u32_array(const struct device_node *np, size_t sz); extern int of_property_read_u64(const struct device_node *np, const char *propname, u64 *out_value); +extern int of_property_read_u64_array(const struct device_node *np, + const char *propname, + u64 *out_values, + size_t sz); extern int of_property_read_string(struct device_node *np, const char *propname, @@ -477,6 +482,13 @@ static inline int of_property_read_u32_array(const struct device_node *np, return -ENOSYS; } +static inline int of_property_read_u64_array(const struct device_node *np, + const char *propname, + u64 *out_values, size_t sz) +{ + return -ENOSYS; +} + static inline int of_property_read_string(struct device_node *np, const char *propname, const char **out_string) diff --git a/include/linux/property.h b/include/linux/property.h new file mode 100644 index 000000000000..9242fb0221ba --- /dev/null +++ b/include/linux/property.h @@ -0,0 +1,73 @@ +/* + * property.h - Unified device property interface. + * + * Copyright (C) 2014, Intel Corporation + * Authors: Rafael J. Wysocki + * Mika Westerberg + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef _LINUX_PROPERTY_H_ +#define _LINUX_PROPERTY_H_ + +#include + +struct device; + +enum dev_prop_type { + DEV_PROP_U8, + DEV_PROP_U16, + DEV_PROP_U32, + DEV_PROP_U64, + DEV_PROP_STRING, + DEV_PROP_MAX, +}; + +bool device_property_present(struct device *dev, const char *propname); +int device_property_read_u8_array(struct device *dev, const char *propname, + u8 *val, size_t nval); +int device_property_read_u16_array(struct device *dev, const char *propname, + u16 *val, size_t nval); +int device_property_read_u32_array(struct device *dev, const char *propname, + u32 *val, size_t nval); +int device_property_read_u64_array(struct device *dev, const char *propname, + u64 *val, size_t nval); +int device_property_read_string_array(struct device *dev, const char *propname, + const char **val, size_t nval); +int device_property_read_string(struct device *dev, const char *propname, + const char **val); + +static inline bool device_property_read_bool(struct device *dev, + const char *propname) +{ + return device_property_present(dev, propname); +} + +static inline int device_property_read_u8(struct device *dev, + const char *propname, u8 *val) +{ + return device_property_read_u8_array(dev, propname, val, 1); +} + +static inline int device_property_read_u16(struct device *dev, + const char *propname, u16 *val) +{ + return device_property_read_u16_array(dev, propname, val, 1); +} + +static inline int device_property_read_u32(struct device *dev, + const char *propname, u32 *val) +{ + return device_property_read_u32_array(dev, propname, val, 1); +} + +static inline int device_property_read_u64(struct device *dev, + const char *propname, u64 *val) +{ + return device_property_read_u64_array(dev, propname, val, 1); +} + +#endif /* _LINUX_PROPERTY_H_ */ -- cgit v1.2.3 From 733e625139fe455b4d910ac63c18c90f7cbe2d6f Mon Sep 17 00:00:00 2001 From: Mika Westerberg Date: Tue, 21 Oct 2014 13:33:56 +0200 Subject: ACPI: Allow drivers to match using Device Tree compatible property We have lots of existing Device Tree enabled drivers and allocating separate _HID for each is not feasible. Instead we allocate special _HID "PRP0001" that means that the match should be done using Device Tree compatible property using driver's .of_match_table instead if the driver is missing .acpi_match_table. If there is a need to distinguish from where the device is enumerated (DT/ACPI) driver can check dev->of_node or ACPI_COMPATION(dev). Signed-off-by: Mika Westerberg Acked-by: Grant Likely Signed-off-by: Rafael J. Wysocki --- include/linux/acpi.h | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) (limited to 'include/linux') diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 76d64d6a903a..38296d686c55 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -424,12 +424,8 @@ extern int acpi_nvs_for_each_region(int (*func)(__u64, __u64, void *), const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, const struct device *dev); -static inline bool acpi_driver_match_device(struct device *dev, - const struct device_driver *drv) -{ - return !!acpi_match_device(drv->acpi_match_table, dev); -} - +extern bool acpi_driver_match_device(struct device *dev, + const struct device_driver *drv); int acpi_device_uevent_modalias(struct device *, struct kobj_uevent_env *); int acpi_device_modalias(struct device *, char *, int); -- cgit v1.2.3 From 5c51277a9ababfa44a7f944100bdc9fbda139905 Mon Sep 17 00:00:00 2001 From: Mika Westerberg Date: Mon, 27 Oct 2014 23:29:32 +0100 Subject: leds: leds-gpio: Add support for GPIO descriptors GPIO descriptors are the preferred way over legacy GPIO numbers nowadays. Convert the driver to use GPIO descriptors internally but still allow passing legacy GPIO numbers from platform data to support existing platforms. Signed-off-by: Mika Westerberg Acked-by: Alexandre Courbot Acked-by: Bryan Wu Acked-by: Arnd Bergmann Acked-by: Grant Likely Signed-off-by: Rafael J. Wysocki --- include/linux/leds.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/leds.h b/include/linux/leds.h index a57611d0c94e..f3af5c4d9084 100644 --- a/include/linux/leds.h +++ b/include/linux/leds.h @@ -261,6 +261,7 @@ struct gpio_led { unsigned retain_state_suspended : 1; unsigned default_state : 2; /* default_state should be one of LEDS_GPIO_DEFSTATE_(ON|OFF|KEEP) */ + struct gpio_desc *gpiod; }; #define LEDS_GPIO_DEFSTATE_OFF 0 #define LEDS_GPIO_DEFSTATE_ON 1 -- cgit v1.2.3 From 633a21d80b4a2cd648aa2dacdb22494ffb2f28f0 Mon Sep 17 00:00:00 2001 From: Aaron Lu Date: Tue, 21 Oct 2014 23:30:25 +0200 Subject: input: gpio_keys_polled: Add support for GPIO descriptors GPIO descriptors are the preferred way over legacy GPIO numbers nowadays. Convert the driver to use GPIO descriptors internally but still allow passing legacy GPIO numbers from platform data to support existing platforms. Signed-off-by: Aaron Lu Signed-off-by: Mika Westerberg Acked-by: Alexandre Courbot Reviewed-by: Linus Walleij Acked-by: Dmitry Torokhov Acked-by: Grant Likely Signed-off-by: Rafael J. Wysocki --- include/linux/gpio_keys.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/linux') diff --git a/include/linux/gpio_keys.h b/include/linux/gpio_keys.h index 8b622468952c..ee2d8c6f9130 100644 --- a/include/linux/gpio_keys.h +++ b/include/linux/gpio_keys.h @@ -2,6 +2,7 @@ #define _GPIO_KEYS_H struct device; +struct gpio_desc; /** * struct gpio_keys_button - configuration parameters @@ -17,6 +18,7 @@ struct device; * disable button via sysfs * @value: axis value for %EV_ABS * @irq: Irq number in case of interrupt keys + * @gpiod: GPIO descriptor */ struct gpio_keys_button { unsigned int code; @@ -29,6 +31,7 @@ struct gpio_keys_button { bool can_disable; int value; unsigned int irq; + struct gpio_desc *gpiod; }; /** -- cgit v1.2.3 From 8a0662d9ed2968e1186208336a8e1fab3fdfea63 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Tue, 4 Nov 2014 14:03:59 +0100 Subject: Driver core: Unified interface for firmware node properties Add new generic routines are provided for retrieving properties from device description objects in the platform firmware in case there are no struct device objects for them (either those objects have not been created yet or they do not exist at all). The following functions are provided: fwnode_property_present() fwnode_property_read_u8() fwnode_property_read_u16() fwnode_property_read_u32() fwnode_property_read_u64() fwnode_property_read_string() fwnode_property_read_u8_array() fwnode_property_read_u16_array() fwnode_property_read_u32_array() fwnode_property_read_u64_array() fwnode_property_read_string_array() in analogy with the corresponding functions for struct device added previously. For all of them, the first argument is a pointer to struct fwnode_handle (new type) that allows a device description object (depending on what platform firmware interface is in use) to be obtained. Add a new macro device_for_each_child_node() for iterating over the children of the device description object associated with a given device and a new function device_get_child_node_count() returning the number of a given device's child nodes. The interface covers both ACPI and Device Trees. Suggested-by: Grant Likely Acked-by: Greg Kroah-Hartman Acked-by: Grant Likely Signed-off-by: Rafael J. Wysocki --- include/linux/acpi.h | 26 ++++++++++++++++++ include/linux/of.h | 22 +++++++++++++++ include/linux/property.h | 70 ++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 118 insertions(+) (limited to 'include/linux') diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 38296d686c55..5b8802216a93 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -440,6 +440,23 @@ struct platform_device *acpi_create_platform_device(struct acpi_device *); #define ACPI_COMPANION_SET(dev, adev) do { } while (0) #define ACPI_HANDLE(dev) (NULL) +struct fwnode_handle; + +static inline bool is_acpi_node(struct fwnode_handle *fwnode) +{ + return false; +} + +static inline struct acpi_device *acpi_node(struct fwnode_handle *fwnode) +{ + return NULL; +} + +static inline struct fwnode_handle *acpi_fwnode_handle(struct acpi_device *adev) +{ + return NULL; +} + static inline const char *acpi_dev_name(struct acpi_device *adev) { return NULL; @@ -681,6 +698,9 @@ int acpi_dev_prop_read_single(struct acpi_device *adev, const char *propname, enum dev_prop_type proptype, void *val); int acpi_dev_prop_read(struct acpi_device *adev, const char *propname, enum dev_prop_type proptype, void *val, size_t nval); + +struct acpi_device *acpi_get_next_child(struct device *dev, + struct acpi_device *child); #else static inline int acpi_dev_get_property(struct acpi_device *adev, const char *name, acpi_object_type type, @@ -725,6 +745,12 @@ static inline int acpi_dev_prop_read(struct acpi_device *adev, return -ENXIO; } +static inline struct acpi_device *acpi_get_next_child(struct device *dev, + struct acpi_device *child) +{ + return NULL; +} + #endif #endif /*_LINUX_ACPI_H*/ diff --git a/include/linux/of.h b/include/linux/of.h index ce9f6a2b3532..cf79be1441d2 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -50,6 +50,7 @@ struct device_node { const char *type; phandle phandle; const char *full_name; + struct fwnode_handle fwnode; struct property *properties; struct property *deadprops; /* removed properties */ @@ -80,6 +81,7 @@ extern struct kobj_type of_node_ktype; static inline void of_node_init(struct device_node *node) { kobject_init(&node->kobj, &of_node_ktype); + node->fwnode.type = FWNODE_OF; } /* true when node is initialized */ @@ -115,6 +117,16 @@ extern struct device_node *of_aliases; extern struct device_node *of_stdout; extern raw_spinlock_t devtree_lock; +static inline bool is_of_node(struct fwnode_handle *fwnode) +{ + return fwnode && fwnode->type == FWNODE_OF; +} + +static inline struct device_node *of_node(struct fwnode_handle *fwnode) +{ + return fwnode ? container_of(fwnode, struct device_node, fwnode) : NULL; +} + static inline bool of_have_populated_dt(void) { return of_allnodes != NULL; @@ -360,6 +372,16 @@ bool of_console_check(struct device_node *dn, char *name, int index); #else /* CONFIG_OF */ +static inline bool is_of_node(struct fwnode_handle *fwnode) +{ + return false; +} + +static inline struct device_node *of_node(struct fwnode_handle *fwnode) +{ + return NULL; +} + static inline const char* of_node_full_name(const struct device_node *np) { return ""; diff --git a/include/linux/property.h b/include/linux/property.h index 9242fb0221ba..a6a3d98bd7e9 100644 --- a/include/linux/property.h +++ b/include/linux/property.h @@ -40,6 +40,46 @@ int device_property_read_string_array(struct device *dev, const char *propname, int device_property_read_string(struct device *dev, const char *propname, const char **val); +enum fwnode_type { + FWNODE_INVALID = 0, + FWNODE_OF, + FWNODE_ACPI, +}; + +struct fwnode_handle { + enum fwnode_type type; +}; + +bool fwnode_property_present(struct fwnode_handle *fwnode, const char *propname); +int fwnode_property_read_u8_array(struct fwnode_handle *fwnode, + const char *propname, u8 *val, + size_t nval); +int fwnode_property_read_u16_array(struct fwnode_handle *fwnode, + const char *propname, u16 *val, + size_t nval); +int fwnode_property_read_u32_array(struct fwnode_handle *fwnode, + const char *propname, u32 *val, + size_t nval); +int fwnode_property_read_u64_array(struct fwnode_handle *fwnode, + const char *propname, u64 *val, + size_t nval); +int fwnode_property_read_string_array(struct fwnode_handle *fwnode, + const char *propname, const char **val, + size_t nval); +int fwnode_property_read_string(struct fwnode_handle *fwnode, + const char *propname, const char **val); + +struct fwnode_handle *device_get_next_child_node(struct device *dev, + struct fwnode_handle *child); + +#define device_for_each_child_node(dev, child) \ + for (child = device_get_next_child_node(dev, NULL); child; \ + child = device_get_next_child_node(dev, child)) + +void fwnode_handle_put(struct fwnode_handle *fwnode); + +unsigned int device_get_child_node_count(struct device *dev); + static inline bool device_property_read_bool(struct device *dev, const char *propname) { @@ -70,4 +110,34 @@ static inline int device_property_read_u64(struct device *dev, return device_property_read_u64_array(dev, propname, val, 1); } +static inline bool fwnode_property_read_bool(struct fwnode_handle *fwnode, + const char *propname) +{ + return fwnode_property_present(fwnode, propname); +} + +static inline int fwnode_property_read_u8(struct fwnode_handle *fwnode, + const char *propname, u8 *val) +{ + return fwnode_property_read_u8_array(fwnode, propname, val, 1); +} + +static inline int fwnode_property_read_u16(struct fwnode_handle *fwnode, + const char *propname, u16 *val) +{ + return fwnode_property_read_u16_array(fwnode, propname, val, 1); +} + +static inline int fwnode_property_read_u32(struct fwnode_handle *fwnode, + const char *propname, u32 *val) +{ + return fwnode_property_read_u32_array(fwnode, propname, val, 1); +} + +static inline int fwnode_property_read_u64(struct fwnode_handle *fwnode, + const char *propname, u64 *val) +{ + return fwnode_property_read_u64_array(fwnode, propname, val, 1); +} + #endif /* _LINUX_PROPERTY_H_ */ -- cgit v1.2.3 From 40b7318319281b1bdec804f6435f26cadd329c13 Mon Sep 17 00:00:00 2001 From: Mika Westerberg Date: Tue, 21 Oct 2014 13:33:59 +0200 Subject: gpio: Support for unified device properties interface Some drivers need to deal with only firmware representation of its GPIOs. An example would be a GPIO button array driver where each button is described as a separate firmware node in device tree. Typically these child nodes do not have physical representation in the Linux device model. In order to help device drivers to handle such firmware child nodes we add dev[m]_get_named_gpiod_from_child() that takes a child firmware node pointer as its second argument (the first one is the parent device itself), finds the GPIO using whatever is the underlying firmware method, and requests the GPIO properly. Signed-off-by: Mika Westerberg Acked-by: Alexandre Courbot Acked-by: Grant Likely Signed-off-by: Rafael J. Wysocki --- include/linux/gpio/consumer.h | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'include/linux') diff --git a/include/linux/gpio/consumer.h b/include/linux/gpio/consumer.h index 12f146fa6604..00b1b70d68ba 100644 --- a/include/linux/gpio/consumer.h +++ b/include/linux/gpio/consumer.h @@ -94,6 +94,13 @@ int gpiod_to_irq(const struct gpio_desc *desc); struct gpio_desc *gpio_to_desc(unsigned gpio); int desc_to_gpio(const struct gpio_desc *desc); +/* Child properties interface */ +struct fwnode_handle; + +struct gpio_desc *fwnode_get_named_gpiod(struct fwnode_handle *fwnode, + const char *propname); +struct gpio_desc *devm_get_gpiod_from_child(struct device *dev, + struct fwnode_handle *child); #else /* CONFIG_GPIOLIB */ static inline struct gpio_desc *__must_check __gpiod_get(struct device *dev, -- cgit v1.2.3 From f028d5242d7ecb0a1bfc80e7bd292201c8612641 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Mon, 3 Nov 2014 23:39:41 +0100 Subject: ACPI / GPIO: Driver GPIO mappings for ACPI GPIOs Provide a way for device drivers using GPIOs described by ACPI GpioIo resources in _CRS to tell the GPIO subsystem what names (connection IDs) to associate with specific GPIO pins defined in there. To do that, a driver needs to define a mapping table as a NULL-terminated array of struct acpi_gpio_mapping objects that each contain a name, a pointer to an array of line data (struct acpi_gpio_params) objects and the size of that array. Each struct acpi_gpio_params object consists of three fields, crs_entry_index, line_index, active_low, representing the index of the target GpioIo()/GpioInt() resource in _CRS starting from zero, the index of the target line in that resource starting from zero, and the active-low flag for that line, respectively. Next, the mapping table needs to be passed as the second argument to acpi_dev_add_driver_gpios() that will register it with the ACPI device object pointed to by its first argument. That should be done in the driver's .probe() routine. On removal, the driver should unregister its GPIO mapping table by calling acpi_dev_remove_driver_gpios() on the ACPI device object where that table was previously registered. Included are fixes from Mika Westerberg. Acked-by: Alexandre Courbot Reviewed-by: Linus Walleij Signed-off-by: Rafael J. Wysocki --- include/linux/acpi.h | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) (limited to 'include/linux') diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 5b8802216a93..0902426c4521 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -673,6 +673,36 @@ do { \ #endif #endif +struct acpi_gpio_params { + unsigned int crs_entry_index; + unsigned int line_index; + bool active_low; +}; + +struct acpi_gpio_mapping { + const char *name; + const struct acpi_gpio_params *data; + unsigned int size; +}; + +#if defined(CONFIG_ACPI) && defined(CONFIG_GPIOLIB) +int acpi_dev_add_driver_gpios(struct acpi_device *adev, + const struct acpi_gpio_mapping *gpios); + +static inline void acpi_dev_remove_driver_gpios(struct acpi_device *adev) +{ + if (adev) + adev->driver_gpios = NULL; +} +#else +static inline int acpi_dev_add_driver_gpios(struct acpi_device *adev, + const struct acpi_gpio_mapping *gpios) +{ + return -ENXIO; +} +static inline void acpi_dev_remove_driver_gpios(struct acpi_device *adev) {} +#endif + /* Device properties */ #define MAX_ACPI_REFERENCE_ARGS 8 -- cgit v1.2.3 From c673a2b4008103525a3cf21bedf15ffac37bfef0 Mon Sep 17 00:00:00 2001 From: Mika Westerberg Date: Fri, 31 Oct 2014 13:40:58 +0200 Subject: leds: leds-gpio: Convert gpio_blink_set() to use GPIO descriptors Commit 21f2aae91e902aad ("leds: leds-gpio: Add support for GPIO descriptors") already converted most of the driver to use GPIO descriptors. What is still missing is the platform specific hook gpio_blink_set() and board files which pass legacy GPIO numbers to this driver in platform data. In this patch we handle the former and convert gpio_blink_set() to take GPIO descriptor instead. In order to do this we convert the existing four users to accept GPIO descriptor and translate it to legacy GPIO number in the platform code. This effectively "pushes" legacy GPIO number usage from the driver to platforms. Also add comment to the remaining block describing that it is legacy code path and we are getting rid of it eventually. Suggested-by: Linus Walleij Signed-off-by: Mika Westerberg Acked-by: Andrew Lunn Reviewed-by: Linus Walleij Acked-by: Alexandre Courbot Signed-off-by: Rafael J. Wysocki --- include/linux/leds.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/leds.h b/include/linux/leds.h index f3af5c4d9084..361101fef270 100644 --- a/include/linux/leds.h +++ b/include/linux/leds.h @@ -274,7 +274,7 @@ struct gpio_led_platform_data { #define GPIO_LED_NO_BLINK_LOW 0 /* No blink GPIO state low */ #define GPIO_LED_NO_BLINK_HIGH 1 /* No blink GPIO state high */ #define GPIO_LED_BLINK 2 /* Please, blink */ - int (*gpio_blink_set)(unsigned gpio, int state, + int (*gpio_blink_set)(struct gpio_desc *desc, int state, unsigned long *delay_on, unsigned long *delay_off); }; -- cgit v1.2.3 From b3d208f96d6bb21247108a956dead6a028d5cdb2 Mon Sep 17 00:00:00 2001 From: Jaegeuk Kim Date: Thu, 23 Oct 2014 19:48:09 -0700 Subject: f2fs: revisit inline_data to avoid data races and potential bugs This patch simplifies the inline_data usage with the following rule. 1. inline_data is set during the file creation. 2. If new data is requested to be written ranges out of inline_data, f2fs converts that inode permanently. 3. There is no cases which converts non-inline_data inode to inline_data. 4. The inline_data flag should be changed under inode page lock. Signed-off-by: Jaegeuk Kim --- include/linux/f2fs_fs.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/f2fs_fs.h b/include/linux/f2fs_fs.h index 63f8303b79ba..cc1064f3153f 100644 --- a/include/linux/f2fs_fs.h +++ b/include/linux/f2fs_fs.h @@ -172,6 +172,7 @@ struct f2fs_extent { #define F2FS_INLINE_XATTR 0x01 /* file inline xattr flag */ #define F2FS_INLINE_DATA 0x02 /* file inline data flag */ #define F2FS_INLINE_DENTRY 0x04 /* file inline dentry flag */ +#define F2FS_DATA_EXIST 0x08 /* file inline data exist flag */ #define MAX_INLINE_DATA (sizeof(__le32) * (DEF_ADDRS_PER_INODE - \ F2FS_INLINE_XATTR_ADDRS - 1)) -- cgit v1.2.3 From be138b7b0d4cbfb8a927d9bc333ceffee9908c23 Mon Sep 17 00:00:00 2001 From: Jaegeuk Kim Date: Thu, 30 Oct 2014 19:01:10 -0700 Subject: f2fs: remove unnecessary macro Let's remove unused macro. Signed-off-by: Jaegeuk Kim --- include/linux/f2fs_fs.h | 4 ---- 1 file changed, 4 deletions(-) (limited to 'include/linux') diff --git a/include/linux/f2fs_fs.h b/include/linux/f2fs_fs.h index cc1064f3153f..87f14e90e984 100644 --- a/include/linux/f2fs_fs.h +++ b/include/linux/f2fs_fs.h @@ -177,10 +177,6 @@ struct f2fs_extent { #define MAX_INLINE_DATA (sizeof(__le32) * (DEF_ADDRS_PER_INODE - \ F2FS_INLINE_XATTR_ADDRS - 1)) -#define INLINE_DATA_OFFSET (PAGE_CACHE_SIZE - sizeof(struct node_footer) -\ - sizeof(__le32) * (DEF_ADDRS_PER_INODE + \ - DEF_NIDS_PER_INODE - 1)) - struct f2fs_inode { __le16 i_mode; /* file mode */ __u8 i_advise; /* file hints */ -- cgit v1.2.3 From 6af91949ab7462d0917f436820c263ae9a89322c Mon Sep 17 00:00:00 2001 From: Brian Norris Date: Wed, 6 Aug 2014 18:16:58 -0700 Subject: mtd: m25p80: drop wait-till-ready checks spi-nor.c should be taking care of these now. Signed-off-by: Brian Norris Reviewed-by: Marek Vasut --- include/linux/mtd/spi-nor.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'include/linux') diff --git a/include/linux/mtd/spi-nor.h b/include/linux/mtd/spi-nor.h index 2f27713b3ae1..d691025d9b00 100644 --- a/include/linux/mtd/spi-nor.h +++ b/include/linux/mtd/spi-nor.h @@ -116,6 +116,10 @@ enum spi_nor_ops { SPI_NOR_OPS_UNLOCK, }; +enum spi_nor_option_flags { + SNOR_F_USE_FSR = BIT(0), +}; + /** * struct spi_nor - Structure for defining a the SPI NOR layer * @mtd: point to a mtd_info structure @@ -129,6 +133,7 @@ enum spi_nor_ops { * @program_opcode: the program opcode * @flash_read: the mode of the read * @sst_write_second: used by the SST write operation + * @flags: flag options for the current SPI-NOR (SNOR_F_*) * @cfg: used by the read_xfer/write_xfer * @cmd_buf: used by the write_reg * @prepare: [OPTIONAL] do some preparations for the @@ -158,6 +163,7 @@ struct spi_nor { u8 program_opcode; enum read_mode flash_read; bool sst_write_second; + u32 flags; struct spi_nor_xfer_cfg cfg; u8 cmd_buf[SPI_NOR_MAX_CMD_SIZE]; -- cgit v1.2.3 From b94ed087744c5bc287d2ed706b476693df07151d Mon Sep 17 00:00:00 2001 From: Brian Norris Date: Wed, 6 Aug 2014 18:17:00 -0700 Subject: mtd: spi-nor: drop replaceable wait-till-ready function pointer We don't need to expose a 'wait-till-ready' interface to drivers. Status register polling should be handled by the core spi-nor.c library, and as of now, I see no need to provide a special driver-specific hook for it. Signed-off-by: Brian Norris Reviewed-by: Marek Vasut --- include/linux/mtd/spi-nor.h | 2 -- 1 file changed, 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/mtd/spi-nor.h b/include/linux/mtd/spi-nor.h index d691025d9b00..63aeccf9ddc8 100644 --- a/include/linux/mtd/spi-nor.h +++ b/include/linux/mtd/spi-nor.h @@ -144,7 +144,6 @@ enum spi_nor_option_flags { * @write_xfer: [OPTIONAL] the writefundamental primitive * @read_reg: [DRIVER-SPECIFIC] read out the register * @write_reg: [DRIVER-SPECIFIC] write data to the register - * @wait_till_ready: [REPLACEABLE] wait till the NOR becomes ready * @read: [DRIVER-SPECIFIC] read data from the SPI NOR * @write: [DRIVER-SPECIFIC] write data to the SPI NOR * @erase: [DRIVER-SPECIFIC] erase a sector of the SPI NOR @@ -176,7 +175,6 @@ struct spi_nor { int (*read_reg)(struct spi_nor *nor, u8 opcode, u8 *buf, int len); int (*write_reg)(struct spi_nor *nor, u8 opcode, u8 *buf, int len, int write_enable); - int (*wait_till_ready)(struct spi_nor *nor); int (*read)(struct spi_nor *nor, loff_t from, size_t len, size_t *retlen, u_char *read_buf); -- cgit v1.2.3 From 9162c6579bf90b3f5ddb7e3a6c6fa946c1b4cbeb Mon Sep 17 00:00:00 2001 From: Hannes Reinecke Date: Wed, 5 Nov 2014 13:08:21 +0100 Subject: libata: Implement ATA_DEV_ZAC Add new ATA device type for ZAC devices. Acked-by: Christoph Hellwig Acked-by: Tejun Heo Signed-off-by: Hannes Reinecke Signed-off-by: Tejun Heo --- include/linux/libata.h | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/libata.h b/include/linux/libata.h index bd5fefeaf548..a26daea7f5eb 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -191,7 +191,8 @@ enum { ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */ ATA_DEV_SEMB = 7, /* SEMB */ ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */ - ATA_DEV_NONE = 9, /* no device */ + ATA_DEV_ZAC = 9, /* ZAC device */ + ATA_DEV_NONE = 10, /* no device */ /* struct ata_link flags */ ATA_LFLAG_NO_HRST = (1 << 1), /* avoid hardreset */ @@ -1491,7 +1492,8 @@ static inline unsigned int ata_tag_internal(unsigned int tag) static inline unsigned int ata_class_enabled(unsigned int class) { return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI || - class == ATA_DEV_PMP || class == ATA_DEV_SEMB; + class == ATA_DEV_PMP || class == ATA_DEV_SEMB || + class == ATA_DEV_ZAC; } static inline unsigned int ata_class_disabled(unsigned int class) -- cgit v1.2.3 From 68c4a4f8abc60c9440ede9cd123d48b78325f7a3 Mon Sep 17 00:00:00 2001 From: Sebastian Schmidt Date: Sun, 19 Oct 2014 20:05:15 +0200 Subject: pstore: Honor dmesg_restrict sysctl on dmesg dumps When the kernel.dmesg_restrict restriction is in place, only users with CAP_SYSLOG should be able to access crash dumps (like: attacker is trying to exploit a bug, watchdog reboots, attacker can happily read crash dumps and logs). This puts the restriction on console-* types as well as sensitive information could have been leaked there. Other log types are unaffected. Signed-off-by: Sebastian Schmidt Acked-by: Kees Cook Signed-off-by: Tony Luck --- include/linux/syslog.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/syslog.h b/include/linux/syslog.h index 98a3153c0f96..9def5297dbb7 100644 --- a/include/linux/syslog.h +++ b/include/linux/syslog.h @@ -48,5 +48,6 @@ #define SYSLOG_FROM_PROC 1 int do_syslog(int type, char __user *buf, int count, bool from_file); +int check_syslog_permissions(int type, bool from_file); #endif /* _LINUX_SYSLOG_H */ -- cgit v1.2.3 From a3816ab0e8fe542a89a53b82506a8ddac063fbe3 Mon Sep 17 00:00:00 2001 From: Joe Perches Date: Mon, 29 Sep 2014 16:08:25 -0700 Subject: fs: Convert show_fdinfo functions to void seq_printf functions shouldn't really check the return value. Checking seq_has_overflowed() occasionally is used instead. Update vfs documentation. Link: http://lkml.kernel.org/p/e37e6e7b76acbdcc3bb4ab2a57c8f8ca1ae11b9a.1412031505.git.joe@perches.com Cc: David S. Miller Cc: Al Viro Signed-off-by: Joe Perches [ did a few clean ups ] Signed-off-by: Steven Rostedt --- include/linux/fs.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/fs.h b/include/linux/fs.h index a957d4366c24..01dd9052a142 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1491,7 +1491,7 @@ struct file_operations { int (*setlease)(struct file *, long, struct file_lock **, void **); long (*fallocate)(struct file *file, int mode, loff_t offset, loff_t len); - int (*show_fdinfo)(struct seq_file *m, struct file *f); + void (*show_fdinfo)(struct seq_file *m, struct file *f); }; struct inode_operations { -- cgit v1.2.3 From 9761536e1d9e9e1f325fb04d4ad46b15a39eb94a Mon Sep 17 00:00:00 2001 From: Joe Perches Date: Mon, 29 Sep 2014 16:08:26 -0700 Subject: debugfs: Have debugfs_print_regs32() return void The seq_printf() will soon just return void, and seq_has_overflowed() should be used instead to see if the seq can no longer accept input. As the return value of debugfs_print_regs32() has no users and the seq_file descriptor should be checked with seq_has_overflowed() instead of return values of functions, it is better to just have debugfs_print_regs32() also return void. Link: http://lkml.kernel.org/p/2634b19eb1c04a9d31148c1fe6f1f3819be95349.1412031505.git.joe@perches.com Acked-by: Greg Kroah-Hartman Signed-off-by: Joe Perches [ original change only updated seq_printf() return, added return of void to debugfs_print_regs32() as well ] Signed-off-by: Steven Rostedt --- include/linux/debugfs.h | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) (limited to 'include/linux') diff --git a/include/linux/debugfs.h b/include/linux/debugfs.h index 4d0b4d1aa132..d84f8c254a87 100644 --- a/include/linux/debugfs.h +++ b/include/linux/debugfs.h @@ -92,8 +92,8 @@ struct dentry *debugfs_create_regset32(const char *name, umode_t mode, struct dentry *parent, struct debugfs_regset32 *regset); -int debugfs_print_regs32(struct seq_file *s, const struct debugfs_reg32 *regs, - int nregs, void __iomem *base, char *prefix); +void debugfs_print_regs32(struct seq_file *s, const struct debugfs_reg32 *regs, + int nregs, void __iomem *base, char *prefix); struct dentry *debugfs_create_u32_array(const char *name, umode_t mode, struct dentry *parent, @@ -233,10 +233,9 @@ static inline struct dentry *debugfs_create_regset32(const char *name, return ERR_PTR(-ENODEV); } -static inline int debugfs_print_regs32(struct seq_file *s, const struct debugfs_reg32 *regs, +static inline void debugfs_print_regs32(struct seq_file *s, const struct debugfs_reg32 *regs, int nregs, void __iomem *base, char *prefix) { - return 0; } static inline bool debugfs_initialized(void) -- cgit v1.2.3 From b4c9f578cb9608f7de0c89aa637a6af4a48061ef Mon Sep 17 00:00:00 2001 From: Jingoo Han Date: Tue, 4 Nov 2014 11:01:47 +0900 Subject: usb: dwc3: exynos: remove non-DT support for Exynos Specific Glue layer DWC3 Exynos Specific Glue layer can be used only for Exynos SoCs. In addition, non-DT for EXYNOS SoCs is not supported from v3.11; thus, there is no need to support non-DT for DWC3 Exynos Specific Glue layer. The 'linux/platform_data/dwc3-exynos.h' file has been used for non-DT support. Thus, the 'dwc3-exynos.h' file is removed, because it is not used anymore. Signed-off-by: Jingoo Han Signed-off-by: Felipe Balbi --- include/linux/platform_data/dwc3-exynos.h | 24 ------------------------ 1 file changed, 24 deletions(-) delete mode 100644 include/linux/platform_data/dwc3-exynos.h (limited to 'include/linux') diff --git a/include/linux/platform_data/dwc3-exynos.h b/include/linux/platform_data/dwc3-exynos.h deleted file mode 100644 index 5eb7da9b3772..000000000000 --- a/include/linux/platform_data/dwc3-exynos.h +++ /dev/null @@ -1,24 +0,0 @@ -/** - * dwc3-exynos.h - Samsung EXYNOS DWC3 Specific Glue layer, header. - * - * Copyright (c) 2012 Samsung Electronics Co., Ltd. - * http://www.samsung.com - * - * Author: Anton Tikhomirov - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - */ - -#ifndef _DWC3_EXYNOS_H_ -#define _DWC3_EXYNOS_H_ - -struct dwc3_exynos_data { - int phy_type; - int (*phy_init)(struct platform_device *pdev, int type); - int (*phy_exit)(struct platform_device *pdev, int type); -}; - -#endif /* _DWC3_EXYNOS_H_ */ -- cgit v1.2.3 From 60ba032ed76e851d30d4fa514847285252147d07 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Wed, 5 Nov 2014 00:29:07 +0100 Subject: ACPI / property: Drop size_prop from acpi_dev_get_property_reference() The size_prop argument of the recently added function acpi_dev_get_property_reference() is not used by the only current caller of that function and is very unlikely to be used at any time going forward. Namely, for a property whose value is a list of items each containing a references to a device object possibly accompanied by some integers, the number of items in the list can always be computed as the number of elements of type ACPI_TYPE_LOCAL_REFERENCE in the property package. Thus it should never be necessary to provide an additional "cells" property with a value equal to the number of items in that list. It also should never be necessary to provide a "cells" property specifying how many integers are supposed to be following each reference. For this reason, drop the size_prop argument from acpi_dev_get_property_reference() and update its caller accordingly. Link: http://marc.info/?l=linux-kernel&m=141511255610556&w=2 Suggested-by: Grant Likely Acked-by: Grant Likely Acked-by: Mika Westerberg Tested-by: Mika Westerberg Signed-off-by: Rafael J. Wysocki --- include/linux/acpi.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 0902426c4521..10f2ed95645c 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -718,8 +718,8 @@ int acpi_dev_get_property(struct acpi_device *adev, const char *name, int acpi_dev_get_property_array(struct acpi_device *adev, const char *name, acpi_object_type type, const union acpi_object **obj); -int acpi_dev_get_property_reference(struct acpi_device *adev, const char *name, - const char *cells_name, size_t index, +int acpi_dev_get_property_reference(struct acpi_device *adev, + const char *name, size_t index, struct acpi_reference_args *args); int acpi_dev_prop_get(struct acpi_device *adev, const char *propname, -- cgit v1.2.3 From 1906bbbddbe085b19be2c21cd132335260f551c3 Mon Sep 17 00:00:00 2001 From: Alexander Aring Date: Wed, 5 Nov 2014 20:51:21 +0100 Subject: ieee802154: add IEEE802154_EXTENDED_ADDR_LEN This patch adds a new define for getting the length of an extended address. Signed-off-by: Alexander Aring Signed-off-by: Marcel Holtmann --- include/linux/ieee802154.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/linux') diff --git a/include/linux/ieee802154.h b/include/linux/ieee802154.h index 4c032863cd71..a907fe59b1d1 100644 --- a/include/linux/ieee802154.h +++ b/include/linux/ieee802154.h @@ -29,6 +29,8 @@ #define IEEE802154_MTU 127 #define IEEE802154_MIN_PSDU_LEN 5 +#define IEEE802154_EXTENDED_ADDR_LEN 8 + #define IEEE802154_FC_TYPE_BEACON 0x0 /* Frame is beacon */ #define IEEE802154_FC_TYPE_DATA 0x1 /* Frame is data */ #define IEEE802154_FC_TYPE_ACK 0x2 /* Frame is acknowledgment */ -- cgit v1.2.3 From 35d5a374a559a1ba9c6810739cf3ad1d672c2de2 Mon Sep 17 00:00:00 2001 From: Alexander Aring Date: Wed, 5 Nov 2014 20:51:22 +0100 Subject: ieee802154: add ieee802154_random_extended_addr This patch adds a new function to generate a random IEEE 802.15.4 extended address. Signed-off-by: Alexander Aring Signed-off-by: Marcel Holtmann --- include/linux/ieee802154.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'include/linux') diff --git a/include/linux/ieee802154.h b/include/linux/ieee802154.h index a907fe59b1d1..d043449a079d 100644 --- a/include/linux/ieee802154.h +++ b/include/linux/ieee802154.h @@ -24,6 +24,7 @@ #define LINUX_IEEE802154_H #include +#include #include #define IEEE802154_MTU 127 @@ -215,4 +216,17 @@ static inline bool ieee802154_is_valid_extended_addr(const __le64 addr) (addr != cpu_to_le64(0xffffffffffffffffULL))); } +/** + * ieee802154_random_extended_addr - generates a random extended address + * @addr: extended addr pointer to place the random address + */ +static inline void ieee802154_random_extended_addr(__le64 *addr) +{ + get_random_bytes(addr, IEEE802154_EXTENDED_ADDR_LEN); + + /* toggle some bit if we hit an invalid extended addr */ + if (!ieee802154_is_valid_extended_addr(*addr)) + ((u8 *)addr)[IEEE802154_EXTENDED_ADDR_LEN - 1] ^= 0x01; +} + #endif /* LINUX_IEEE802154_H */ -- cgit v1.2.3 From e585f23636370320bc2071ca5ba2744ae37c3e51 Mon Sep 17 00:00:00 2001 From: Tom Herbert Date: Tue, 4 Nov 2014 09:06:54 -0800 Subject: udp: Changes to udp_offload to support remote checksum offload Add a new GSO type, SKB_GSO_TUNNEL_REMCSUM, which indicates remote checksum offload being done (in this case inner checksum must not be offloaded to the NIC). Added logic in __skb_udp_tunnel_segment to handle remote checksum offload case. Signed-off-by: Tom Herbert Signed-off-by: David S. Miller --- include/linux/netdev_features.h | 4 +++- include/linux/netdevice.h | 1 + include/linux/skbuff.h | 4 +++- 3 files changed, 7 insertions(+), 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/netdev_features.h b/include/linux/netdev_features.h index dcfdecbfa0b7..8c94b07e654a 100644 --- a/include/linux/netdev_features.h +++ b/include/linux/netdev_features.h @@ -48,8 +48,9 @@ enum { NETIF_F_GSO_UDP_TUNNEL_BIT, /* ... UDP TUNNEL with TSO */ NETIF_F_GSO_UDP_TUNNEL_CSUM_BIT,/* ... UDP TUNNEL with TSO & CSUM */ NETIF_F_GSO_MPLS_BIT, /* ... MPLS segmentation */ + NETIF_F_GSO_TUNNEL_REMCSUM_BIT, /* ... TUNNEL with TSO & REMCSUM */ /**/NETIF_F_GSO_LAST = /* last bit, see GSO_MASK */ - NETIF_F_GSO_MPLS_BIT, + NETIF_F_GSO_TUNNEL_REMCSUM_BIT, NETIF_F_FCOE_CRC_BIT, /* FCoE CRC32 */ NETIF_F_SCTP_CSUM_BIT, /* SCTP checksum offload */ @@ -119,6 +120,7 @@ enum { #define NETIF_F_GSO_UDP_TUNNEL __NETIF_F(GSO_UDP_TUNNEL) #define NETIF_F_GSO_UDP_TUNNEL_CSUM __NETIF_F(GSO_UDP_TUNNEL_CSUM) #define NETIF_F_GSO_MPLS __NETIF_F(GSO_MPLS) +#define NETIF_F_GSO_TUNNEL_REMCSUM __NETIF_F(GSO_TUNNEL_REMCSUM) #define NETIF_F_HW_VLAN_STAG_FILTER __NETIF_F(HW_VLAN_STAG_FILTER) #define NETIF_F_HW_VLAN_STAG_RX __NETIF_F(HW_VLAN_STAG_RX) #define NETIF_F_HW_VLAN_STAG_TX __NETIF_F(HW_VLAN_STAG_TX) diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 5ed05bd764dc..4767f546d7c0 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -3584,6 +3584,7 @@ static inline bool net_gso_ok(netdev_features_t features, int gso_type) BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL != (NETIF_F_GSO_UDP_TUNNEL >> NETIF_F_GSO_SHIFT)); BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM != (NETIF_F_GSO_UDP_TUNNEL_CSUM >> NETIF_F_GSO_SHIFT)); BUILD_BUG_ON(SKB_GSO_MPLS != (NETIF_F_GSO_MPLS >> NETIF_F_GSO_SHIFT)); + BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM != (NETIF_F_GSO_TUNNEL_REMCSUM >> NETIF_F_GSO_SHIFT)); return (features & feature) == feature; } diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 5ad9675b6fe1..74ed34413969 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -373,6 +373,7 @@ enum { SKB_GSO_MPLS = 1 << 12, + SKB_GSO_TUNNEL_REMCSUM = 1 << 13, }; #if BITS_PER_LONG > 32 @@ -603,7 +604,8 @@ struct sk_buff { #endif __u8 ipvs_property:1; __u8 inner_protocol_type:1; - /* 4 or 6 bit hole */ + __u8 remcsum_offload:1; + /* 3 or 5 bit hole */ #ifdef CONFIG_NET_SCHED __u16 tc_index; /* traffic control index */ -- cgit v1.2.3 From 51f3d02b980a338cd291d2bc7629cdfb2568424b Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Wed, 5 Nov 2014 16:46:40 -0500 Subject: net: Add and use skb_copy_datagram_msg() helper. This encapsulates all of the skb_copy_datagram_iovec() callers with call argument signature "skb, offset, msghdr->msg_iov, length". When we move to iov_iters in the networking, the iov_iter object will sit in the msghdr. Having a helper like this means there will be less places to touch during that transformation. Based upon descriptions and patch from Al Viro. Signed-off-by: David S. Miller --- include/linux/skbuff.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'include/linux') diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 74ed34413969..39ec7530ae27 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -21,6 +21,7 @@ #include #include #include +#include #include #include @@ -2639,6 +2640,11 @@ unsigned int datagram_poll(struct file *file, struct socket *sock, struct poll_table_struct *wait); int skb_copy_datagram_iovec(const struct sk_buff *from, int offset, struct iovec *to, int size); +static inline int skb_copy_datagram_msg(const struct sk_buff *from, int offset, + struct msghdr *msg, int size) +{ + return skb_copy_datagram_iovec(from, offset, msg->msg_iov, size); +} int skb_copy_and_csum_datagram_iovec(struct sk_buff *skb, int hlen, struct iovec *iov); int skb_copy_datagram_from_iovec(struct sk_buff *skb, int offset, -- cgit v1.2.3 From 25de4668d094f00e44a8f2428dd3c1a4ecfa0053 Mon Sep 17 00:00:00 2001 From: WANG Cong Date: Tue, 4 Nov 2014 10:59:47 -0800 Subject: ipv6: move INET6_MATCH() to include/net/inet6_hashtables.h It is only used in net/ipv6/inet6_hashtables.c. Cc: David S. Miller Signed-off-by: Cong Wang Signed-off-by: David S. Miller --- include/linux/ipv6.h | 10 ---------- 1 file changed, 10 deletions(-) (limited to 'include/linux') diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h index 7121a2e97ce2..c694e7baa621 100644 --- a/include/linux/ipv6.h +++ b/include/linux/ipv6.h @@ -317,14 +317,4 @@ static inline struct raw6_sock *raw6_sk(const struct sock *sk) #define tcp_twsk_ipv6only(__sk) 0 #define inet_v6_ipv6only(__sk) 0 #endif /* IS_ENABLED(CONFIG_IPV6) */ - -#define INET6_MATCH(__sk, __net, __saddr, __daddr, __ports, __dif) \ - (((__sk)->sk_portpair == (__ports)) && \ - ((__sk)->sk_family == AF_INET6) && \ - ipv6_addr_equal(&(__sk)->sk_v6_daddr, (__saddr)) && \ - ipv6_addr_equal(&(__sk)->sk_v6_rcv_saddr, (__daddr)) && \ - (!(__sk)->sk_bound_dev_if || \ - ((__sk)->sk_bound_dev_if == (__dif))) && \ - net_eq(sock_net(__sk), (__net))) - #endif /* _IPV6_H */ -- cgit v1.2.3 From 096916610f415e07cfe71d71a391011c617be5ed Mon Sep 17 00:00:00 2001 From: Aaron Sierra Date: Tue, 26 Aug 2014 18:18:33 -0500 Subject: fsl_ifc: Support all 8 IFC chip selects Freescale's QorIQ T Series processors support 8 IFC chip selects within a memory map backward compatible with previous P Series processors which supported only 4 chip selects. Signed-off-by: Aaron Sierra Signed-off-by: Brian Norris --- include/linux/fsl_ifc.h | 21 ++++++++++++++++----- 1 file changed, 16 insertions(+), 5 deletions(-) (limited to 'include/linux') diff --git a/include/linux/fsl_ifc.h b/include/linux/fsl_ifc.h index 84d60cb841b1..bf0321eabbda 100644 --- a/include/linux/fsl_ifc.h +++ b/include/linux/fsl_ifc.h @@ -29,7 +29,16 @@ #include #include -#define FSL_IFC_BANK_COUNT 4 +/* + * The actual number of banks implemented depends on the IFC version + * - IFC version 1.0 implements 4 banks. + * - IFC version 1.1 onward implements 8 banks. + */ +#define FSL_IFC_BANK_COUNT 8 + +#define FSL_IFC_VERSION_MASK 0x0F0F0000 +#define FSL_IFC_VERSION_1_0_0 0x01000000 +#define FSL_IFC_VERSION_1_1_0 0x01010000 /* * CSPR - Chip Select Property Register @@ -776,23 +785,23 @@ struct fsl_ifc_regs { __be32 cspr; u32 res2; } cspr_cs[FSL_IFC_BANK_COUNT]; - u32 res3[0x19]; + u32 res3[0xd]; struct { __be32 amask; u32 res4[0x2]; } amask_cs[FSL_IFC_BANK_COUNT]; - u32 res5[0x18]; + u32 res5[0xc]; struct { __be32 csor; __be32 csor_ext; u32 res6; } csor_cs[FSL_IFC_BANK_COUNT]; - u32 res7[0x18]; + u32 res7[0xc]; struct { __be32 ftim[4]; u32 res8[0x8]; } ftim_cs[FSL_IFC_BANK_COUNT]; - u32 res9[0x60]; + u32 res9[0x30]; __be32 rb_stat; u32 res10[0x2]; __be32 ifc_gcr; @@ -827,6 +836,8 @@ struct fsl_ifc_ctrl { int nand_irq; spinlock_t lock; void *nand; + int version; + int banks; u32 nand_stat; wait_queue_head_t nand_wait; -- cgit v1.2.3 From d4260b51699082c7dea257bea002d79394e876e0 Mon Sep 17 00:00:00 2001 From: Peter Hurley Date: Thu, 16 Oct 2014 14:19:47 -0400 Subject: serial: Fix upstat_t sparse warnings Commit 299245a145b2ad4cfb4c5432eb1264299f55e7e0, serial: core: Privatize modem status enable flags, introduced the upstat_t type and matching bit definitions. The purpose is to produce sparse warnings if the wrong bit definitions are used (by warning of implicit integer conversions). Fix implicit conversion to integer return type from uart_cts_enabled() and uart_dcd_enabled(). Fixes the following sparse warnings: drivers/tty/serial/serial_core.c:63:30: warning: incorrect type in return expression (different base types) drivers/tty/serial/serial_core.c:63:30: expected int drivers/tty/serial/serial_core.c:63:30: got restricted upstat_t include/linux/serial_core.h:364:30: warning: incorrect type in return expression (different base types) include/linux/serial_core.h:364:30: expected bool include/linux/serial_core.h:364:30: got restricted upstat_t include/linux/serial_core.h:364:30: warning: incorrect type in return expression (different base types) include/linux/serial_core.h:364:30: expected bool include/linux/serial_core.h:364:30: got restricted upstat_t Reported-by: Fengguang Wu Signed-off-by: Peter Hurley Signed-off-by: Greg Kroah-Hartman --- include/linux/serial_core.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h index 21c2e05c1bc3..bccf4bac22f5 100644 --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -367,7 +367,7 @@ static inline int uart_tx_stopped(struct uart_port *port) static inline bool uart_cts_enabled(struct uart_port *uport) { - return uport->status & UPSTAT_CTS_ENABLE; + return !!(uport->status & UPSTAT_CTS_ENABLE); } /* -- cgit v1.2.3 From 8f166e00196fcb16364c9c39dab6fe7b72e63f18 Mon Sep 17 00:00:00 2001 From: Peter Hurley Date: Thu, 16 Oct 2014 14:59:41 -0400 Subject: tty: Remove tty_pair_get_tty()/tty_pair_get_pty() api tty_pair_get_pty() has no in-tree users and tty_pair_get_tty() has only one file-local user. Remove the external declarations, the export declarations, and declare tty_pair_get_tty() static. Signed-off-by: Peter Hurley Reviewed-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- include/linux/tty.h | 3 --- 1 file changed, 3 deletions(-) (limited to 'include/linux') diff --git a/include/linux/tty.h b/include/linux/tty.h index 5171ef8f7b85..b36b0b445c1f 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -498,9 +498,6 @@ extern int tty_init_termios(struct tty_struct *tty); extern int tty_standard_install(struct tty_driver *driver, struct tty_struct *tty); -extern struct tty_struct *tty_pair_get_tty(struct tty_struct *tty); -extern struct tty_struct *tty_pair_get_pty(struct tty_struct *tty); - extern struct mutex tty_mutex; extern spinlock_t tty_files_lock; -- cgit v1.2.3 From e1c2296c3485158304bfad5a80e89078463d70c8 Mon Sep 17 00:00:00 2001 From: Peter Hurley Date: Thu, 16 Oct 2014 14:59:48 -0400 Subject: tty: Move session_of_pgrp() and make static tiocspgrp() is the lone caller of session_of_pgrp(); relocate and limit to file scope. Signed-off-by: Peter Hurley Reviewed-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- include/linux/kernel.h | 3 --- 1 file changed, 3 deletions(-) (limited to 'include/linux') diff --git a/include/linux/kernel.h b/include/linux/kernel.h index 3d770f5564b8..01bc530fbfcb 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -411,9 +411,6 @@ extern int __kernel_text_address(unsigned long addr); extern int kernel_text_address(unsigned long addr); extern int func_ptr_is_kernel_text(void *ptr); -struct pid; -extern struct pid *session_of_pgrp(struct pid *pgrp); - unsigned long int_sqrt(unsigned long); extern void bust_spinlocks(int yes); -- cgit v1.2.3 From 3ff51a199f9e85aed843471bc10dae9e94dbb0fc Mon Sep 17 00:00:00 2001 From: Peter Hurley Date: Wed, 5 Nov 2014 12:12:46 -0500 Subject: tty: Remove TTY_HUPPING Now that tty_ldisc_hangup() does not drop the tty lock, it is no longer possible to observe TTY_HUPPING while holding the tty lock on another cpu. Remove TTY_HUPPING bit definition. Reviewed-by: Alan Cox Signed-off-by: Peter Hurley Signed-off-by: Greg Kroah-Hartman --- include/linux/tty.h | 1 - 1 file changed, 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/tty.h b/include/linux/tty.h index b36b0b445c1f..ff0dd7aeaf3b 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -321,7 +321,6 @@ struct tty_file_private { #define TTY_PTY_LOCK 16 /* pty private */ #define TTY_NO_WRITE_SPLIT 17 /* Preserve write boundaries to driver */ #define TTY_HUPPED 18 /* Post driver->hangup() */ -#define TTY_HUPPING 21 /* ->hangup() in progress */ #define TTY_LDISC_HALTED 22 /* Line discipline is halted */ #define TTY_WRITE_FLUSH(tty) tty_write_flush((tty)) -- cgit v1.2.3 From 04980706c8febe41ec598116b174bd3a2dc82355 Mon Sep 17 00:00:00 2001 From: Peter Hurley Date: Wed, 5 Nov 2014 12:12:52 -0500 Subject: tty: Remove TTY_CLOSING Now that re-open is not permitted for a legacy BSD pty master, using TTY_CLOSING to indicate when a tty can be torn-down is no longer necessary. Reviewed-by: Alan Cox Signed-off-by: Peter Hurley Signed-off-by: Greg Kroah-Hartman --- include/linux/tty.h | 1 - 1 file changed, 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/tty.h b/include/linux/tty.h index ff0dd7aeaf3b..35b29f0750f8 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -316,7 +316,6 @@ struct tty_file_private { #define TTY_EXCLUSIVE 3 /* Exclusive open mode */ #define TTY_DEBUG 4 /* Debugging */ #define TTY_DO_WRITE_WAKEUP 5 /* Call write_wakeup after queuing new */ -#define TTY_CLOSING 7 /* ->close() in progress */ #define TTY_LDISC_OPEN 11 /* Line discipline is open */ #define TTY_PTY_LOCK 16 /* pty private */ #define TTY_NO_WRITE_SPLIT 17 /* Preserve write boundaries to driver */ -- cgit v1.2.3 From 62462aefeb5aff092fc97037d9c12a4afe95a3ff Mon Sep 17 00:00:00 2001 From: Peter Hurley Date: Wed, 5 Nov 2014 12:12:58 -0500 Subject: tty: Simplify tty_ldisc_release() interface Passing the 'other' tty to tty_ldisc_release() only makes sense for a pty pair; make o_tty function local instead. Reviewed-by: Alan Cox Signed-off-by: Peter Hurley Signed-off-by: Greg Kroah-Hartman --- include/linux/tty.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/tty.h b/include/linux/tty.h index 35b29f0750f8..af1a7f3e4e4a 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -557,7 +557,7 @@ extern int tty_register_ldisc(int disc, struct tty_ldisc_ops *new_ldisc); extern int tty_unregister_ldisc(int disc); extern int tty_set_ldisc(struct tty_struct *tty, int ldisc); extern int tty_ldisc_setup(struct tty_struct *tty, struct tty_struct *o_tty); -extern void tty_ldisc_release(struct tty_struct *tty, struct tty_struct *o_tty); +extern void tty_ldisc_release(struct tty_struct *tty); extern void tty_ldisc_init(struct tty_struct *tty); extern void tty_ldisc_deinit(struct tty_struct *tty); extern void tty_ldisc_begin(void); -- cgit v1.2.3 From 2aff5e2bc62db43e05c814461a08aff0fc2b7fe5 Mon Sep 17 00:00:00 2001 From: Peter Hurley Date: Wed, 5 Nov 2014 12:13:01 -0500 Subject: tty: Change tty lock order to master->slave When releasing the master pty, the slave pty also needs to be locked to prevent concurrent tty count changes for the slave pty and to ensure that only one parallel master and slave release observe the final close, and proceed to destruct the pty pair. Conversely, when releasing the slave pty, locking the master pty is not necessary (since the master's state can be inferred by the slave tty count). Introduce tty_lock_slave()/tty_unlock_slave() which acquires/releases the tty lock of the slave pty. Remove tty_lock_pair()/tty_unlock_pair(). Dropping the tty_lock is no longer required to re-establish a stable lock order. Reviewed-by: Alan Cox Signed-off-by: Peter Hurley Signed-off-by: Greg Kroah-Hartman --- include/linux/tty.h | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) (limited to 'include/linux') diff --git a/include/linux/tty.h b/include/linux/tty.h index af1a7f3e4e4a..a07b4b415db8 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -638,11 +638,8 @@ extern long vt_compat_ioctl(struct tty_struct *tty, /* functions for preparation of BKL removal */ extern void __lockfunc tty_lock(struct tty_struct *tty); extern void __lockfunc tty_unlock(struct tty_struct *tty); -extern void __lockfunc tty_lock_pair(struct tty_struct *tty, - struct tty_struct *tty2); -extern void __lockfunc tty_unlock_pair(struct tty_struct *tty, - struct tty_struct *tty2); - +extern void __lockfunc tty_lock_slave(struct tty_struct *tty); +extern void __lockfunc tty_unlock_slave(struct tty_struct *tty); /* * this shall be called only from where BTM is held (like close) * -- cgit v1.2.3 From 2febdb632bb96235b94b8fccaf882a78f8f4b2bb Mon Sep 17 00:00:00 2001 From: Peter Hurley Date: Wed, 5 Nov 2014 12:13:02 -0500 Subject: tty: Preset lock subclass for nested tty locks Eliminate the requirement of specifying the tty lock nesting at lock time; instead, set the lock subclass for slave ptys at pty install (normal ttys and master ptys use subclass 0). Signed-off-by: Peter Hurley Signed-off-by: Greg Kroah-Hartman --- include/linux/tty.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/tty.h b/include/linux/tty.h index a07b4b415db8..196c352a5ce8 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -640,6 +640,7 @@ extern void __lockfunc tty_lock(struct tty_struct *tty); extern void __lockfunc tty_unlock(struct tty_struct *tty); extern void __lockfunc tty_lock_slave(struct tty_struct *tty); extern void __lockfunc tty_unlock_slave(struct tty_struct *tty); +extern void tty_set_lock_subclass(struct tty_struct *tty); /* * this shall be called only from where BTM is held (like close) * -- cgit v1.2.3 From 35af935ee47eb4548e0052733e9d75328e260fa1 Mon Sep 17 00:00:00 2001 From: Peter Hurley Date: Wed, 5 Nov 2014 12:13:03 -0500 Subject: tty: Remove tty_unhangup() declaration The tty_unhangup() function is not defined. Reviewed-by: Alan Cox Signed-off-by: Peter Hurley Signed-off-by: Greg Kroah-Hartman --- include/linux/tty.h | 1 - 1 file changed, 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/tty.h b/include/linux/tty.h index 196c352a5ce8..e33ea1a0c2d0 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -435,7 +435,6 @@ extern int is_ignored(int sig); extern int tty_signal(int sig, struct tty_struct *tty); extern void tty_hangup(struct tty_struct *tty); extern void tty_vhangup(struct tty_struct *tty); -extern void tty_unhangup(struct file *filp); extern int tty_hung_up_p(struct file *filp); extern void do_SAK(struct tty_struct *tty); extern void __do_SAK(struct tty_struct *tty); -- cgit v1.2.3 From 86c80a8e2ab443e9c4261b3499de4ce808399104 Mon Sep 17 00:00:00 2001 From: Peter Hurley Date: Wed, 5 Nov 2014 12:13:09 -0500 Subject: tty: Flush ldisc buffer atomically with tty flip buffers tty_ldisc_flush() first clears the line discipline input buffer, then clears the tty flip buffers. However, this allows for existing data in the tty flip buffers to be added after the ldisc input buffer has been cleared, but before the flip buffers have been cleared. Add an optional ldisc parameter to tty_buffer_flush() to allow tty_ldisc_flush() to pass the ldisc to clear. NB: Initially, the plan was to do this automatically in tty_buffer_flush(). However, an audit of the behavior of existing line disciplines showed that performing a ldisc buffer flush on ioctl(TCFLSH) was not always the outcome. For example, some line disciplines have flush_buffer() methods but not ioctl() methods, so a ->flush_buffer() command would be unexpected. Reviewed-by: Alan Cox Signed-off-by: Peter Hurley Signed-off-by: Greg Kroah-Hartman --- include/linux/tty.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/tty.h b/include/linux/tty.h index e33ea1a0c2d0..f6835ea1079a 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -441,7 +441,7 @@ extern void __do_SAK(struct tty_struct *tty); extern void no_tty(void); extern void tty_flush_to_ldisc(struct tty_struct *tty); extern void tty_buffer_free_all(struct tty_port *port); -extern void tty_buffer_flush(struct tty_struct *tty); +extern void tty_buffer_flush(struct tty_struct *tty, struct tty_ldisc *ld); extern void tty_buffer_init(struct tty_port *port); extern speed_t tty_termios_baud_rate(struct ktermios *termios); extern speed_t tty_termios_input_baud_rate(struct ktermios *termios); -- cgit v1.2.3 From 904326ecac022ebaeb39cdfb206fd3b6551cdfca Mon Sep 17 00:00:00 2001 From: Peter Hurley Date: Thu, 16 Oct 2014 16:54:21 -0400 Subject: tty,serial: Unify UPF_* and ASYNC_* flag definitions The userspace-defined ASYNC_* flags in include/uapi/linux/tty_flags.h are the authoritative bit definitions for the serial_struct flags, and thus for any derivative values or fields. Although the serial core provides the TIOCSSERIAL and TIOCGSERIAL ioctls to set and retrieve these flags from userspace, it defines these bits independently, as UPF_* macros. Define the UPF_* macros which are userspace-modifiable directly from the ASYNC_* symbolic constants. Add compile-time test to ensure the bits changeable by TIOCSSERIAL match the defined range in the uapi header. Add ASYNCB_MAGIC_MULTIPLIER to the uapi header since this bit is programmable by userspace. Signed-off-by: Peter Hurley Signed-off-by: Greg Kroah-Hartman --- include/linux/serial_core.h | 47 ++++++++++++++++++++++++++++++--------------- 1 file changed, 32 insertions(+), 15 deletions(-) (limited to 'include/linux') diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h index bccf4bac22f5..ad9329669aba 100644 --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -160,21 +160,33 @@ struct uart_port { /* flags must be updated while holding port mutex */ upf_t flags; -#define UPF_FOURPORT ((__force upf_t) (1 << 1)) -#define UPF_SAK ((__force upf_t) (1 << 2)) -#define UPF_SPD_MASK ((__force upf_t) (0x1030)) -#define UPF_SPD_HI ((__force upf_t) (0x0010)) -#define UPF_SPD_VHI ((__force upf_t) (0x0020)) -#define UPF_SPD_CUST ((__force upf_t) (0x0030)) -#define UPF_SPD_SHI ((__force upf_t) (0x1000)) -#define UPF_SPD_WARP ((__force upf_t) (0x1010)) -#define UPF_SKIP_TEST ((__force upf_t) (1 << 6)) -#define UPF_AUTO_IRQ ((__force upf_t) (1 << 7)) -#define UPF_HARDPPS_CD ((__force upf_t) (1 << 11)) -#define UPF_LOW_LATENCY ((__force upf_t) (1 << 13)) -#define UPF_BUGGY_UART ((__force upf_t) (1 << 14)) + /* + * These flags must be equivalent to the flags defined in + * include/uapi/linux/tty_flags.h which are the userspace definitions + * assigned from the serial_struct flags in uart_set_info() + * [for bit definitions in the UPF_CHANGE_MASK] + * + * Bits [0..UPF_LAST_USER] are userspace defined/visible/changeable + * except bit 15 (UPF_NO_TXEN_TEST) which is masked off. + * The remaining bits are serial-core specific and not modifiable by + * userspace. + */ +#define UPF_FOURPORT ((__force upf_t) ASYNC_FOURPORT /* 1 */ ) +#define UPF_SAK ((__force upf_t) ASYNC_SAK /* 2 */ ) +#define UPF_SPD_HI ((__force upf_t) ASYNC_SPD_HI /* 4 */ ) +#define UPF_SPD_VHI ((__force upf_t) ASYNC_SPD_VHI /* 5 */ ) +#define UPF_SPD_CUST ((__force upf_t) ASYNC_SPD_CUST /* 0x0030 */ ) +#define UPF_SPD_WARP ((__force upf_t) ASYNC_SPD_WARP /* 0x1010 */ ) +#define UPF_SPD_MASK ((__force upf_t) ASYNC_SPD_MASK /* 0x1030 */ ) +#define UPF_SKIP_TEST ((__force upf_t) ASYNC_SKIP_TEST /* 6 */ ) +#define UPF_AUTO_IRQ ((__force upf_t) ASYNC_AUTO_IRQ /* 7 */ ) +#define UPF_HARDPPS_CD ((__force upf_t) ASYNC_HARDPPS_CD /* 11 */ ) +#define UPF_SPD_SHI ((__force upf_t) ASYNC_SPD_SHI /* 12 */ ) +#define UPF_LOW_LATENCY ((__force upf_t) ASYNC_LOW_LATENCY /* 13 */ ) +#define UPF_BUGGY_UART ((__force upf_t) ASYNC_BUGGY_UART /* 14 */ ) #define UPF_NO_TXEN_TEST ((__force upf_t) (1 << 15)) -#define UPF_MAGIC_MULTIPLIER ((__force upf_t) (1 << 16)) +#define UPF_MAGIC_MULTIPLIER ((__force upf_t) ASYNC_MAGIC_MULTIPLIER /* 16 */ ) + /* Port has hardware-assisted h/w flow control (iow, auto-RTS *not* auto-CTS) */ #define UPF_HARD_FLOW ((__force upf_t) (1 << 21)) /* Port has hardware-assisted s/w flow control */ @@ -190,9 +202,14 @@ struct uart_port { #define UPF_DEAD ((__force upf_t) (1 << 30)) #define UPF_IOREMAP ((__force upf_t) (1 << 31)) -#define UPF_CHANGE_MASK ((__force upf_t) (0x17fff)) +#define __UPF_CHANGE_MASK 0x17fff +#define UPF_CHANGE_MASK ((__force upf_t) __UPF_CHANGE_MASK) #define UPF_USR_MASK ((__force upf_t) (UPF_SPD_MASK|UPF_LOW_LATENCY)) +#if __UPF_CHANGE_MASK > ASYNC_FLAGS +#error Change mask not equivalent to userspace-visible bit defines +#endif + /* status must be updated while holding port lock */ upstat_t status; -- cgit v1.2.3 From e5a2c899957659cd1a9f789bc462f9c0b35f5150 Mon Sep 17 00:00:00 2001 From: Hannes Frederic Sowa Date: Wed, 5 Nov 2014 00:23:04 +0100 Subject: fast_hash: avoid indirect function calls By default the arch_fast_hash hashing function pointers are initialized to jhash(2). If during boot-up a CPU with SSE4.2 is detected they get updated to the CRC32 ones. This dispatching scheme incurs a function pointer lookup and indirect call for every hashing operation. rhashtable as a user of arch_fast_hash e.g. stores pointers to hashing functions in its structure, too, causing two indirect branches per hashing operation. Using alternative_call we can get away with one of those indirect branches. Acked-by: Daniel Borkmann Cc: Thomas Graf Signed-off-by: Hannes Frederic Sowa Signed-off-by: David S. Miller --- include/linux/hash.h | 34 ---------------------------------- 1 file changed, 34 deletions(-) (limited to 'include/linux') diff --git a/include/linux/hash.h b/include/linux/hash.h index d0494c399392..6e8fb028848c 100644 --- a/include/linux/hash.h +++ b/include/linux/hash.h @@ -84,38 +84,4 @@ static inline u32 hash32_ptr(const void *ptr) return (u32)val; } -struct fast_hash_ops { - u32 (*hash)(const void *data, u32 len, u32 seed); - u32 (*hash2)(const u32 *data, u32 len, u32 seed); -}; - -/** - * arch_fast_hash - Caclulates a hash over a given buffer that can have - * arbitrary size. This function will eventually use an - * architecture-optimized hashing implementation if - * available, and trades off distribution for speed. - * - * @data: buffer to hash - * @len: length of buffer in bytes - * @seed: start seed - * - * Returns 32bit hash. - */ -extern u32 arch_fast_hash(const void *data, u32 len, u32 seed); - -/** - * arch_fast_hash2 - Caclulates a hash over a given buffer that has a - * size that is of a multiple of 32bit words. This - * function will eventually use an architecture- - * optimized hashing implementation if available, - * and trades off distribution for speed. - * - * @data: buffer to hash (must be 32bit padded) - * @len: number of 32bit words - * @seed: start seed - * - * Returns 32bit hash. - */ -extern u32 arch_fast_hash2(const u32 *data, u32 len, u32 seed); - #endif /* _LINUX_HASH_H */ -- cgit v1.2.3 From 1d597e7c266658697843352c5c030e20f48c6230 Mon Sep 17 00:00:00 2001 From: Peter Hurley Date: Wed, 5 Nov 2014 12:26:26 -0500 Subject: tty: Remove defunct pcxe_open() declaration pcxe_open() has no definition in mainline; remove declaration. Signed-off-by: Peter Hurley Signed-off-by: Greg Kroah-Hartman --- include/linux/tty.h | 4 ---- 1 file changed, 4 deletions(-) (limited to 'include/linux') diff --git a/include/linux/tty.h b/include/linux/tty.h index f6835ea1079a..97cfb3108e29 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -621,10 +621,6 @@ extern long n_tty_compat_ioctl_helper(struct tty_struct *tty, struct file *file, extern void serial_console_init(void); -/* pcxx.c */ - -extern int pcxe_open(struct tty_struct *tty, struct file *filp); - /* vt.c */ extern int vt_ioctl(struct tty_struct *tty, -- cgit v1.2.3 From b9104f5cec3b7d8fb4068bce5ddc8240dc7b81f7 Mon Sep 17 00:00:00 2001 From: Peter Hurley Date: Wed, 5 Nov 2014 12:26:27 -0500 Subject: tty: Remove defunct serial_console_init() declaration serial_console_init() is not defined by the tty core; remove declaration. Note that the powerpc arch boot code contains a serial_console_init() declaration in arch/powerpc/boot/ops.h which is restricted to the powerpc arch boot. Signed-off-by: Peter Hurley Signed-off-by: Greg Kroah-Hartman --- include/linux/tty.h | 4 ---- 1 file changed, 4 deletions(-) (limited to 'include/linux') diff --git a/include/linux/tty.h b/include/linux/tty.h index 97cfb3108e29..c52a689e09aa 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -617,10 +617,6 @@ extern int n_tty_ioctl_helper(struct tty_struct *tty, struct file *file, extern long n_tty_compat_ioctl_helper(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg); -/* serial.c */ - -extern void serial_console_init(void); - /* vt.c */ extern int vt_ioctl(struct tty_struct *tty, -- cgit v1.2.3 From 59b93b41e7fa71138734a911b11b044340dd16bd Mon Sep 17 00:00:00 2001 From: Pravin B Shelar Date: Wed, 5 Nov 2014 15:27:48 -0800 Subject: net: Remove MPLS GSO feature. Device can export MPLS GSO support in dev->mpls_features same way it export vlan features in dev->vlan_features. So it is safe to remove NETIF_F_GSO_MPLS redundant flag. Signed-off-by: Pravin B Shelar --- include/linux/netdev_features.h | 5 +---- include/linux/netdevice.h | 1 - include/linux/skbuff.h | 4 +--- 3 files changed, 2 insertions(+), 8 deletions(-) (limited to 'include/linux') diff --git a/include/linux/netdev_features.h b/include/linux/netdev_features.h index 8c94b07e654a..8e30685affeb 100644 --- a/include/linux/netdev_features.h +++ b/include/linux/netdev_features.h @@ -47,7 +47,6 @@ enum { NETIF_F_GSO_SIT_BIT, /* ... SIT tunnel with TSO */ NETIF_F_GSO_UDP_TUNNEL_BIT, /* ... UDP TUNNEL with TSO */ NETIF_F_GSO_UDP_TUNNEL_CSUM_BIT,/* ... UDP TUNNEL with TSO & CSUM */ - NETIF_F_GSO_MPLS_BIT, /* ... MPLS segmentation */ NETIF_F_GSO_TUNNEL_REMCSUM_BIT, /* ... TUNNEL with TSO & REMCSUM */ /**/NETIF_F_GSO_LAST = /* last bit, see GSO_MASK */ NETIF_F_GSO_TUNNEL_REMCSUM_BIT, @@ -119,7 +118,6 @@ enum { #define NETIF_F_GSO_SIT __NETIF_F(GSO_SIT) #define NETIF_F_GSO_UDP_TUNNEL __NETIF_F(GSO_UDP_TUNNEL) #define NETIF_F_GSO_UDP_TUNNEL_CSUM __NETIF_F(GSO_UDP_TUNNEL_CSUM) -#define NETIF_F_GSO_MPLS __NETIF_F(GSO_MPLS) #define NETIF_F_GSO_TUNNEL_REMCSUM __NETIF_F(GSO_TUNNEL_REMCSUM) #define NETIF_F_HW_VLAN_STAG_FILTER __NETIF_F(HW_VLAN_STAG_FILTER) #define NETIF_F_HW_VLAN_STAG_RX __NETIF_F(HW_VLAN_STAG_RX) @@ -183,7 +181,6 @@ enum { NETIF_F_GSO_IPIP | \ NETIF_F_GSO_SIT | \ NETIF_F_GSO_UDP_TUNNEL | \ - NETIF_F_GSO_UDP_TUNNEL_CSUM | \ - NETIF_F_GSO_MPLS) + NETIF_F_GSO_UDP_TUNNEL_CSUM) #endif /* _LINUX_NETDEV_FEATURES_H */ diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 4767f546d7c0..90ac95900a11 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -3583,7 +3583,6 @@ static inline bool net_gso_ok(netdev_features_t features, int gso_type) BUILD_BUG_ON(SKB_GSO_SIT != (NETIF_F_GSO_SIT >> NETIF_F_GSO_SHIFT)); BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL != (NETIF_F_GSO_UDP_TUNNEL >> NETIF_F_GSO_SHIFT)); BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM != (NETIF_F_GSO_UDP_TUNNEL_CSUM >> NETIF_F_GSO_SHIFT)); - BUILD_BUG_ON(SKB_GSO_MPLS != (NETIF_F_GSO_MPLS >> NETIF_F_GSO_SHIFT)); BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM != (NETIF_F_GSO_TUNNEL_REMCSUM >> NETIF_F_GSO_SHIFT)); return (features & feature) == feature; diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 39ec7530ae27..53f4f6c93356 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -372,9 +372,7 @@ enum { SKB_GSO_UDP_TUNNEL_CSUM = 1 << 11, - SKB_GSO_MPLS = 1 << 12, - - SKB_GSO_TUNNEL_REMCSUM = 1 << 13, + SKB_GSO_TUNNEL_REMCSUM = 1 << 12, }; #if BITS_PER_LONG > 32 -- cgit v1.2.3 From e979f3b712c8b8ae44bab591427f1647dd25aa0d Mon Sep 17 00:00:00 2001 From: Kevin Cernekee Date: Tue, 21 Oct 2014 15:23:03 -0700 Subject: tty: serial: bcm63xx: Eliminate unnecessary request/release functions We don't really need to perform the ioremap "on demand" so it's simpler just to do it from the probe function. This also lets us eliminate the UART_REG_SIZE constant and rely on the resource information passed in from the DT or platform code. Signed-off-by: Kevin Cernekee Signed-off-by: Greg Kroah-Hartman --- include/linux/serial_bcm63xx.h | 2 -- 1 file changed, 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/serial_bcm63xx.h b/include/linux/serial_bcm63xx.h index a80aa1a5bee2..570e964dc899 100644 --- a/include/linux/serial_bcm63xx.h +++ b/include/linux/serial_bcm63xx.h @@ -116,6 +116,4 @@ UART_FIFO_PARERR_MASK | \ UART_FIFO_BRKDET_MASK) -#define UART_REG_SIZE 24 - #endif /* _LINUX_SERIAL_BCM63XX_H */ -- cgit v1.2.3 From 413ba6385382bc80e4bf2f58efa900e82e810b11 Mon Sep 17 00:00:00 2001 From: Peter Hurley Date: Wed, 5 Nov 2014 12:40:04 -0500 Subject: tty: Convert tty->closing to int tty->closing is a bitfield member; prevent corruption from non-atomic update by assigning a unique memory location. Signed-off-by: Peter Hurley Signed-off-by: Greg Kroah-Hartman --- include/linux/tty.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/tty.h b/include/linux/tty.h index c52a689e09aa..7d66ae508e5c 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -284,7 +284,7 @@ struct tty_struct { #define N_TTY_BUF_SIZE 4096 - unsigned char closing:1; + int closing; unsigned char *write_buf; int write_cnt; /* If the tty has a pending do_SAK, queue it here - akpm */ -- cgit v1.2.3 From 732a84a037a4de29b54e0b4e6cb6f9b3813e29e5 Mon Sep 17 00:00:00 2001 From: Peter Hurley Date: Wed, 5 Nov 2014 13:11:43 -0500 Subject: serial: core: Pass termios to set_ldisc() notifications UART drivers which enable modem status interrupts when switching to N_PPS line discipline need to determine if modem status interrupts should be disabled when switching from N_PPS. Specifically, the set_ldisc() notification needs to evaluate UART_ENABLE_MS() which requires termios->c_cflag. Convert in-tree UART drivers to new interface. Signed-off-by: Peter Hurley Signed-off-by: Greg Kroah-Hartman --- include/linux/serial_core.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h index ad9329669aba..40b4cc4f8e1d 100644 --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -63,7 +63,7 @@ struct uart_ops { void (*flush_buffer)(struct uart_port *); void (*set_termios)(struct uart_port *, struct ktermios *new, struct ktermios *old); - void (*set_ldisc)(struct uart_port *, int new); + void (*set_ldisc)(struct uart_port *, struct ktermios *); void (*pm)(struct uart_port *, unsigned int state, unsigned int oldstate); -- cgit v1.2.3 From a5f276f10ff70da89b349df445e944c8cd87956c Mon Sep 17 00:00:00 2001 From: Ricardo Ribalda Delgado Date: Thu, 6 Nov 2014 22:46:13 +0100 Subject: serial_core: Handle TIOC[GS]RS485 ioctls. The following drivers: 8250_core, atmel_serial, max310x, mcf, omap-serial and sci16is7xx implement code to handle RS485 ioctls. In order to avoid code duplication, we implement a simple ioctl handler on the serial_core layer. This handler can be used by all the other drivers instead of duplicating code. Until this is the only RS485 ioctl handler, it will try first the rs485_config callback and if it is not present it will call the driver specific ioctl. Reviewed-by: Alan Cox Cc: Greg Kroah-Hartman Cc: Jiri Slaby Signed-off-by: Ricardo Ribalda Delgado Signed-off-by: Greg Kroah-Hartman --- include/linux/serial_core.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/linux') diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h index 40b4cc4f8e1d..3231a43f6acf 100644 --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -131,6 +131,8 @@ struct uart_port { void (*pm)(struct uart_port *, unsigned int state, unsigned int old); void (*handle_break)(struct uart_port *); + int (*rs485_config)(struct uart_port *, + struct serial_rs485 *rs485); unsigned int irq; /* irq number */ unsigned long irqflags; /* irq flags */ unsigned int uartclk; /* base uart clock */ @@ -231,6 +233,7 @@ struct uart_port { unsigned char unused[2]; struct attribute_group *attr_group; /* port specific attributes */ const struct attribute_group **tty_groups; /* all attributes (serial core use only) */ + struct serial_rs485 rs485; void *private_data; /* generic platform data pointer */ }; -- cgit v1.2.3 From 039ec1f010e6b058f497381d5a6bb840e160b4ac Mon Sep 17 00:00:00 2001 From: Ricardo Ribalda Delgado Date: Thu, 6 Nov 2014 09:22:53 +0100 Subject: serial/8250: Remove obsolete handling of rs485 ioctls There is no more users for this functions. All the 8250 drivers are using the rs485 handler on serial_core instead. Reviewed-by: Alan Cox Cc: Jiri Slaby Cc: Sebastian Andrzej Siewior Cc: Alan Cox Cc: Tony Lindgren Cc: Peter Hurley Cc: Yoshihiro YUNOMAE Cc: Andy Shevchenko Cc: Ingo Molnar Signed-off-by: Ricardo Ribalda Delgado Signed-off-by: Greg Kroah-Hartman --- include/linux/serial_8250.h | 3 --- 1 file changed, 3 deletions(-) (limited to 'include/linux') diff --git a/include/linux/serial_8250.h b/include/linux/serial_8250.h index 3df10d5f154b..e02acf0a0ec9 100644 --- a/include/linux/serial_8250.h +++ b/include/linux/serial_8250.h @@ -97,13 +97,10 @@ struct uart_8250_port { unsigned char msr_saved_flags; struct uart_8250_dma *dma; - struct serial_rs485 rs485; /* 8250 specific callbacks */ int (*dl_read)(struct uart_8250_port *); void (*dl_write)(struct uart_8250_port *, int); - int (*rs485_config)(struct uart_8250_port *, - struct serial_rs485 *rs485); }; static inline struct uart_8250_port *up_to_u8250p(struct uart_port *up) -- cgit v1.2.3 From c3b50dc219e1437e4dcb6a1639b004648dc29faa Mon Sep 17 00:00:00 2001 From: Wolfram Sang Date: Tue, 28 Oct 2014 17:40:41 +0100 Subject: core: platform: let platform_driver_probe initialize module owner Since commit 9447057eaff8 ("platform_device: use a macro instead of platform_driver_register"), platform_driver_register() always overwrites the .owner field of a platform_driver with THIS_MODULE. This breaks platform_driver_probe() which uses it from within the platform core instead of the module init. Fix it by using a similar #define construct to obtain THIS_MODULE and pass it on later. Reported-by: Russell King Signed-off-by: Wolfram Sang Signed-off-by: Greg Kroah-Hartman --- include/linux/platform_device.h | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h index 153d303af7eb..c8d95c60da19 100644 --- a/include/linux/platform_device.h +++ b/include/linux/platform_device.h @@ -197,8 +197,10 @@ extern void platform_driver_unregister(struct platform_driver *); /* non-hotpluggable platform devices may use this so that probe() and * its support may live in __init sections, conserving runtime memory. */ -extern int platform_driver_probe(struct platform_driver *driver, - int (*probe)(struct platform_device *)); +#define platform_driver_probe(drv, probe) \ + __platform_driver_probe(drv, probe, THIS_MODULE) +extern int __platform_driver_probe(struct platform_driver *driver, + int (*probe)(struct platform_device *), struct module *module); static inline void *platform_get_drvdata(const struct platform_device *pdev) { -- cgit v1.2.3 From 291f653a140ad880426125e5e9dbb70f4c184683 Mon Sep 17 00:00:00 2001 From: Wolfram Sang Date: Tue, 28 Oct 2014 17:40:42 +0100 Subject: core: platform: let platform_create_bundle initialize module owner Since commit 9447057eaff8 ("platform_device: use a macro instead of platform_driver_register"), platform_driver_register() always overwrites the .owner field of a platform_driver with THIS_MODULE. This breaks platform_create_bundle() which uses it via platform_driver_probe() from within the platform core instead of the module init. Fix it by using a similar #define construct to obtain THIS_MODULE and pass it on later. Reported-by: Russell King Signed-off-by: Wolfram Sang Signed-off-by: Greg Kroah-Hartman --- include/linux/platform_device.h | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h index c8d95c60da19..ae4882ca4a64 100644 --- a/include/linux/platform_device.h +++ b/include/linux/platform_device.h @@ -240,10 +240,12 @@ static void __exit __platform_driver##_exit(void) \ } \ module_exit(__platform_driver##_exit); -extern struct platform_device *platform_create_bundle( +#define platform_create_bundle(driver, probe, res, n_res, data, size) \ + __platform_create_bundle(driver, probe, res, n_res, data, size, THIS_MODULE) +extern struct platform_device *__platform_create_bundle( struct platform_driver *driver, int (*probe)(struct platform_device *), struct resource *res, unsigned int n_res, - const void *data, size_t size); + const void *data, size_t size, struct module *module); /* early platform driver interface */ struct early_platform_driver { -- cgit v1.2.3 From 38737d82f9f0168955f9944c3f8bd3bb262c7e88 Mon Sep 17 00:00:00 2001 From: Yijing Wang Date: Mon, 27 Oct 2014 10:44:36 +0800 Subject: PCI/MSI: Add pci_msi_ignore_mask to prevent writes to MSI/MSI-X Mask Bits MSI-X vector Mask Bits are in MSI-X Tables in PCI memory space. Xen PV guests can't write to those tables. MSI vector Mask Bits are in PCI configuration space. Xen PV guests can write to config space, but those writes are ignored. Commit 0e4ccb1505a9 ("PCI: Add x86_msi.msi_mask_irq() and msix_mask_irq()") added a way to override default_mask_msi_irqs() and default_mask_msix_irqs() so they can be no-ops in Xen guests, but this is more complicated than necessary. Add "pci_msi_ignore_mask" in the core PCI MSI code. If set, default_mask_msi_irqs() and default_mask_msix_irqs() return without doing anything. This is less flexible, but much simpler. [bhelgaas: changelog] Signed-off-by: Yijing Wang Signed-off-by: Bjorn Helgaas Reviewed-by: David Vrabel CC: Konrad Rzeszutek Wilk CC: xen-devel@lists.xenproject.org --- include/linux/msi.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/msi.h b/include/linux/msi.h index 44f4746d033b..86dc501a1534 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -10,6 +10,7 @@ struct msi_msg { u32 data; /* 16 bits of msi message data */ }; +extern int pci_msi_ignore_mask; /* Helper functions */ struct irq_data; struct msi_desc; -- cgit v1.2.3 From 245bd6f6af8a62a2e2e14976e5ef3dc2b82ec153 Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Thu, 6 Nov 2014 15:51:00 +0200 Subject: PM / clock_ops: Add pm_clk_add_clk() The existing pm_clk_add() allows to pass a clock by con_id. However, when referring to a specific clock from DT, no con_id is available. Add pm_clk_add_clk(), which allows to specify the struct clk * directly. The will will increment refcount on clock pointer, so the caller has to use clk_put() on clock pointer when done. Reviewed-by: Santosh Shilimkar Reviewed-by: Kevin Hilman Signed-off-by: Geert Uytterhoeven Signed-off-by: Grygorii Strashko Reviewed-by: Dmitry Torokhov Signed-off-by: Rafael J. Wysocki --- include/linux/pm_clock.h | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'include/linux') diff --git a/include/linux/pm_clock.h b/include/linux/pm_clock.h index 8348866e7b05..0b0039634410 100644 --- a/include/linux/pm_clock.h +++ b/include/linux/pm_clock.h @@ -18,6 +18,8 @@ struct pm_clk_notifier_block { char *con_ids[]; }; +struct clk; + #ifdef CONFIG_PM_CLK static inline bool pm_clk_no_clocks(struct device *dev) { @@ -29,6 +31,7 @@ extern void pm_clk_init(struct device *dev); extern int pm_clk_create(struct device *dev); extern void pm_clk_destroy(struct device *dev); extern int pm_clk_add(struct device *dev, const char *con_id); +extern int pm_clk_add_clk(struct device *dev, struct clk *clk); extern void pm_clk_remove(struct device *dev, const char *con_id); extern int pm_clk_suspend(struct device *dev); extern int pm_clk_resume(struct device *dev); @@ -51,6 +54,11 @@ static inline int pm_clk_add(struct device *dev, const char *con_id) { return -EINVAL; } + +static inline int pm_clk_add_clk(struct device *dev, struct clk *clk) +{ + return -EINVAL; +} static inline void pm_clk_remove(struct device *dev, const char *con_id) { } -- cgit v1.2.3 From b07597367001c2c4f36a97863530f71b84060d3d Mon Sep 17 00:00:00 2001 From: Padmavathi Venna Date: Fri, 7 Nov 2014 12:24:39 +0530 Subject: ASoC: Samsung: Add quirk for internal DMA Internal DMA is available only on some of Samsung platforms. So added a quirk for the same and made it optional. Signed-off-by: Padmavathi Venna Signed-off-by: Mark Brown --- include/linux/platform_data/asoc-s3c.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/platform_data/asoc-s3c.h b/include/linux/platform_data/asoc-s3c.h index a6591c693ebb..5e0bc779e6c5 100644 --- a/include/linux/platform_data/asoc-s3c.h +++ b/include/linux/platform_data/asoc-s3c.h @@ -27,6 +27,7 @@ struct samsung_i2s { #define QUIRK_NO_MUXPSR (1 << 2) #define QUIRK_NEED_RSTCLR (1 << 3) #define QUIRK_SUPPORTS_TDM (1 << 4) +#define QUIRK_SUPPORTS_IDMA (1 << 5) /* Quirks of the I2S controller */ u32 quirks; dma_addr_t idma_addr; -- cgit v1.2.3 From b9ec1c9da64f0c1d130beb125a916d0725363ec9 Mon Sep 17 00:00:00 2001 From: Chris Rorvick Date: Tue, 4 Nov 2014 19:18:45 -0600 Subject: usb: Create separate header for ehci-dbgp The FUSBH200 and FOTG210 controllers implement sufficiently EHCI- compatible debug ports to leverage ehci-dbgp from their respective drivers. Rather than including header, though, they replicate the necessary declarations in their own headers. Move the ehci-dbgp stuff into its own header as a first step towards removing this redundancy. Signed-off-by: Chris Rorvick Signed-off-by: Greg Kroah-Hartman --- include/linux/usb/ehci-dbgp.h | 84 +++++++++++++++++++++++++++++++++++++++++++ include/linux/usb/ehci_def.h | 65 ++------------------------------- 2 files changed, 86 insertions(+), 63 deletions(-) create mode 100644 include/linux/usb/ehci-dbgp.h (limited to 'include/linux') diff --git a/include/linux/usb/ehci-dbgp.h b/include/linux/usb/ehci-dbgp.h new file mode 100644 index 000000000000..796c1cd6f26a --- /dev/null +++ b/include/linux/usb/ehci-dbgp.h @@ -0,0 +1,84 @@ +/* + * Standalone EHCI usb debug driver + * + * Originally written by: + * Eric W. Biederman" and + * Yinghai Lu + * + * Changes for early/late printk and HW errata: + * Jason Wessel + * Copyright (C) 2009 Wind River Systems, Inc. + * + */ + +#ifndef __LINUX_USB_EHCI_DBGP_H +#define __LINUX_USB_EHCI_DBGP_H + +#include +#include + +/* Appendix C, Debug port ... intended for use with special "debug devices" + * that can help if there's no serial console. (nonstandard enumeration.) + */ +struct ehci_dbg_port { + u32 control; +#define DBGP_OWNER (1<<30) +#define DBGP_ENABLED (1<<28) +#define DBGP_DONE (1<<16) +#define DBGP_INUSE (1<<10) +#define DBGP_ERRCODE(x) (((x)>>7)&0x07) +# define DBGP_ERR_BAD 1 +# define DBGP_ERR_SIGNAL 2 +#define DBGP_ERROR (1<<6) +#define DBGP_GO (1<<5) +#define DBGP_OUT (1<<4) +#define DBGP_LEN(x) (((x)>>0)&0x0f) + u32 pids; +#define DBGP_PID_GET(x) (((x)>>16)&0xff) +#define DBGP_PID_SET(data, tok) (((data)<<8)|(tok)) + u32 data03; + u32 data47; + u32 address; +#define DBGP_EPADDR(dev, ep) (((dev)<<8)|(ep)) +}; + +#ifdef CONFIG_EARLY_PRINTK_DBGP +#include +extern int __init early_dbgp_init(char *s); +extern struct console early_dbgp_console; +#endif /* CONFIG_EARLY_PRINTK_DBGP */ + +struct usb_hcd; + +#ifdef CONFIG_XEN_DOM0 +extern int xen_dbgp_reset_prep(struct usb_hcd *); +extern int xen_dbgp_external_startup(struct usb_hcd *); +#else +static inline int xen_dbgp_reset_prep(struct usb_hcd *hcd) +{ + return 1; /* Shouldn't this be 0? */ +} + +static inline int xen_dbgp_external_startup(struct usb_hcd *hcd) +{ + return -1; +} +#endif + +#ifdef CONFIG_EARLY_PRINTK_DBGP +/* Call backs from ehci host driver to ehci debug driver */ +extern int dbgp_external_startup(struct usb_hcd *); +extern int dbgp_reset_prep(struct usb_hcd *); +#else +static inline int dbgp_reset_prep(struct usb_hcd *hcd) +{ + return xen_dbgp_reset_prep(hcd); +} + +static inline int dbgp_external_startup(struct usb_hcd *hcd) +{ + return xen_dbgp_external_startup(hcd); +} +#endif + +#endif /* __LINUX_USB_EHCI_DBGP_H */ diff --git a/include/linux/usb/ehci_def.h b/include/linux/usb/ehci_def.h index daec99af5d54..966889a20ea3 100644 --- a/include/linux/usb/ehci_def.h +++ b/include/linux/usb/ehci_def.h @@ -19,6 +19,8 @@ #ifndef __LINUX_USB_EHCI_DEF_H #define __LINUX_USB_EHCI_DEF_H +#include + /* EHCI register interface, corresponds to EHCI Revision 0.95 specification */ /* Section 2.2 Host Controller Capability Registers */ @@ -190,67 +192,4 @@ struct ehci_regs { #define USBMODE_EX_HC (3<<0) /* host controller mode */ }; -/* Appendix C, Debug port ... intended for use with special "debug devices" - * that can help if there's no serial console. (nonstandard enumeration.) - */ -struct ehci_dbg_port { - u32 control; -#define DBGP_OWNER (1<<30) -#define DBGP_ENABLED (1<<28) -#define DBGP_DONE (1<<16) -#define DBGP_INUSE (1<<10) -#define DBGP_ERRCODE(x) (((x)>>7)&0x07) -# define DBGP_ERR_BAD 1 -# define DBGP_ERR_SIGNAL 2 -#define DBGP_ERROR (1<<6) -#define DBGP_GO (1<<5) -#define DBGP_OUT (1<<4) -#define DBGP_LEN(x) (((x)>>0)&0x0f) - u32 pids; -#define DBGP_PID_GET(x) (((x)>>16)&0xff) -#define DBGP_PID_SET(data, tok) (((data)<<8)|(tok)) - u32 data03; - u32 data47; - u32 address; -#define DBGP_EPADDR(dev, ep) (((dev)<<8)|(ep)) -}; - -#ifdef CONFIG_EARLY_PRINTK_DBGP -#include -extern int __init early_dbgp_init(char *s); -extern struct console early_dbgp_console; -#endif /* CONFIG_EARLY_PRINTK_DBGP */ - -struct usb_hcd; - -#ifdef CONFIG_XEN_DOM0 -extern int xen_dbgp_reset_prep(struct usb_hcd *); -extern int xen_dbgp_external_startup(struct usb_hcd *); -#else -static inline int xen_dbgp_reset_prep(struct usb_hcd *hcd) -{ - return 1; /* Shouldn't this be 0? */ -} - -static inline int xen_dbgp_external_startup(struct usb_hcd *hcd) -{ - return -1; -} -#endif - -#ifdef CONFIG_EARLY_PRINTK_DBGP -/* Call backs from ehci host driver to ehci debug driver */ -extern int dbgp_external_startup(struct usb_hcd *); -extern int dbgp_reset_prep(struct usb_hcd *hcd); -#else -static inline int dbgp_reset_prep(struct usb_hcd *hcd) -{ - return xen_dbgp_reset_prep(hcd); -} -static inline int dbgp_external_startup(struct usb_hcd *hcd) -{ - return xen_dbgp_external_startup(hcd); -} -#endif - #endif /* __LINUX_USB_EHCI_DEF_H */ -- cgit v1.2.3 From 35a27eab6f94e15fa30f7662af00fbec50526f4a Mon Sep 17 00:00:00 2001 From: Chris Rorvick Date: Tue, 4 Nov 2014 19:18:54 -0600 Subject: usb: Remove __init from early_dbgp_init() prototype Specifying these attributes in both the prototype and the function definition is unnecessary and could cause confusion or bugs if they are inconsistent. As such, __init should only be specified at the function definition. Keith Owens suggested this as a janitorial task on LKML several years ago: https://lkml.org/lkml/2006/1/14/305 Signed-off-by: Chris Rorvick Signed-off-by: Greg Kroah-Hartman --- include/linux/usb/ehci-dbgp.h | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/usb/ehci-dbgp.h b/include/linux/usb/ehci-dbgp.h index 796c1cd6f26a..7344d9e591cc 100644 --- a/include/linux/usb/ehci-dbgp.h +++ b/include/linux/usb/ehci-dbgp.h @@ -43,8 +43,7 @@ struct ehci_dbg_port { }; #ifdef CONFIG_EARLY_PRINTK_DBGP -#include -extern int __init early_dbgp_init(char *s); +extern int early_dbgp_init(char *s); extern struct console early_dbgp_console; #endif /* CONFIG_EARLY_PRINTK_DBGP */ -- cgit v1.2.3 From a8f820aa4066d2c97e75ecd1bbca8a7920b66f2c Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Fri, 7 Nov 2014 21:22:22 +0800 Subject: inet: Add skb_copy_datagram_iter This patch adds skb_copy_datagram_iter, which is identical to skb_copy_datagram_iovec except that it operates on iov_iter instead of iovec. Eventually all users of skb_copy_datagram_iovec should switch over to iov_iter and then we can remove skb_copy_datagram_iovec. Signed-off-by: Herbert Xu Signed-off-by: David S. Miller --- include/linux/skbuff.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/linux') diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 53f4f6c93356..933cfce7fcd9 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -150,6 +150,7 @@ struct net_device; struct scatterlist; struct pipe_inode_info; +struct iov_iter; #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) struct nf_conntrack { @@ -2653,6 +2654,8 @@ int zerocopy_sg_from_iovec(struct sk_buff *skb, const struct iovec *frm, int skb_copy_datagram_const_iovec(const struct sk_buff *from, int offset, const struct iovec *to, int to_offset, int size); +int skb_copy_datagram_iter(const struct sk_buff *from, int offset, + struct iov_iter *to, int size); void skb_free_datagram(struct sock *sk, struct sk_buff *skb); void skb_free_datagram_locked(struct sock *sk, struct sk_buff *skb); int skb_kill_datagram(struct sock *sk, struct sk_buff *skb, unsigned int flags); -- cgit v1.2.3 From bfe1be38fcee0e13ad53175d0b530707c20f93ec Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Fri, 7 Nov 2014 21:22:26 +0800 Subject: net: Kill skb_copy_datagram_const_iovec Now that both macvtap and tun are using skb_copy_datagram_iter, we can kill the abomination that is skb_copy_datagram_const_iovec. Signed-off-by: Herbert Xu Signed-off-by: David S. Miller --- include/linux/skbuff.h | 3 --- 1 file changed, 3 deletions(-) (limited to 'include/linux') diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 933cfce7fcd9..103fbe8113f8 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -2651,9 +2651,6 @@ int skb_copy_datagram_from_iovec(struct sk_buff *skb, int offset, int len); int zerocopy_sg_from_iovec(struct sk_buff *skb, const struct iovec *frm, int offset, size_t count); -int skb_copy_datagram_const_iovec(const struct sk_buff *from, int offset, - const struct iovec *to, int to_offset, - int size); int skb_copy_datagram_iter(const struct sk_buff *from, int offset, struct iov_iter *to, int size); void skb_free_datagram(struct sock *sk, struct sk_buff *skb); -- cgit v1.2.3 From 5559b7bc42f1ff85759246e40ef73abf3171d8d9 Mon Sep 17 00:00:00 2001 From: Cristian Stoica Date: Tue, 7 Oct 2014 18:25:43 +0300 Subject: devres: support sizes greater than an unsigned long As in 4f452e8aa492c0b8028ca9b4bdb4d018ba28c6c7, use resource_size_t to accomodate sizes greater than the size of an unsigned long int on platforms that have more than 32 bit physical addresses. Signed-off-by: Cristian Stoica Signed-off-by: Greg Kroah-Hartman --- include/linux/io.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/io.h b/include/linux/io.h index d5fc9b8d8b03..fa02e55e5a2e 100644 --- a/include/linux/io.h +++ b/include/linux/io.h @@ -61,9 +61,9 @@ static inline void devm_ioport_unmap(struct device *dev, void __iomem *addr) #define IOMEM_ERR_PTR(err) (__force void __iomem *)ERR_PTR(err) void __iomem *devm_ioremap(struct device *dev, resource_size_t offset, - unsigned long size); + resource_size_t size); void __iomem *devm_ioremap_nocache(struct device *dev, resource_size_t offset, - unsigned long size); + resource_size_t size); void devm_iounmap(struct device *dev, void __iomem *addr); int check_signature(const volatile void __iomem *io_addr, const unsigned char *signature, int length); -- cgit v1.2.3 From e0f1147cc9512d3610d2f2a0f069690661444703 Mon Sep 17 00:00:00 2001 From: Cristian Stoica Date: Thu, 9 Oct 2014 15:00:27 +0300 Subject: uio: support memory sizes larger than 32 bits This is a completion to 27a90700a4275c5178b883b65927affdafa5185c The size field is also increased to allow values larger than 32 bits on platforms that have more than 32 bit physical addresses. Signed-off-by: Cristian Stoica Signed-off-by: Greg Kroah-Hartman --- include/linux/uio_driver.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/uio_driver.h b/include/linux/uio_driver.h index baa81718d985..32c0e83d6239 100644 --- a/include/linux/uio_driver.h +++ b/include/linux/uio_driver.h @@ -35,7 +35,7 @@ struct uio_map; struct uio_mem { const char *name; phys_addr_t addr; - unsigned long size; + resource_size_t size; int memtype; void __iomem *internal_addr; struct uio_map *map; -- cgit v1.2.3 From 2b75869bba676c248d8d25ae6d2bd9221dfffdb6 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Mon, 13 Oct 2014 16:41:28 +1100 Subject: sysfs/kernfs: allow attributes to request write buffer be pre-allocated. md/raid allows metadata management to be performed in user-space. A various times, particularly on device failure, the metadata needs to be updated before further writes can be permitted. This means that the user-space program which updates metadata much not block on writeout, and so must not allocate memory. mlockall(MCL_CURRENT|MCL_FUTURE) and pre-allocation can avoid all memory allocation issues for user-memory, but that does not help kernel memory. Several kernel objects can be pre-allocated. e.g. files opened before any writes to the array are permitted. However some kernel allocation happens in places that cannot be pre-allocated. In particular, writes to sysfs files (to tell md that it can now allow writes to the array) allocate a buffer using GFP_KERNEL. This patch allows attributes to be marked as "PREALLOC". In that case the maximal buffer is allocated when the file is opened, and then used on each write instead of allocating a new buffer. As the same buffer is now shared for all writes on the same file description, the mutex is extended to cover full use of the buffer including the copy_from_user(). The new __ATTR_PREALLOC() 'or's a new flag in to the 'mode', which is inspected by sysfs_add_file_mode_ns() to determine if the file should be marked as requiring prealloc. Despite the comment, we *do* use ->seq_show together with ->prealloc in this patch. The next patch fixes that. Signed-off-by: NeilBrown Reviewed-by: Tejun Heo Signed-off-by: Greg Kroah-Hartman --- include/linux/kernfs.h | 8 ++++++++ include/linux/sysfs.h | 9 +++++++++ 2 files changed, 17 insertions(+) (limited to 'include/linux') diff --git a/include/linux/kernfs.h b/include/linux/kernfs.h index 30faf797c2c3..d4e01b358341 100644 --- a/include/linux/kernfs.h +++ b/include/linux/kernfs.h @@ -179,6 +179,7 @@ struct kernfs_open_file { struct mutex mutex; int event; struct list_head list; + char *prealloc_buf; size_t atomic_write_len; bool mmapped; @@ -214,6 +215,13 @@ struct kernfs_ops { * larger ones are rejected with -E2BIG. */ size_t atomic_write_len; + /* + * "prealloc" causes a buffer to be allocated at open for + * all read/write requests. As ->seq_show uses seq_read() + * which does its own allocation, it is incompatible with + * ->prealloc. Provide ->read and ->write with ->prealloc. + */ + bool prealloc; ssize_t (*write)(struct kernfs_open_file *of, char *buf, size_t bytes, loff_t off); diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h index f97d0dbb59fa..ddad16148bd6 100644 --- a/include/linux/sysfs.h +++ b/include/linux/sysfs.h @@ -70,6 +70,8 @@ struct attribute_group { * for examples.. */ +#define SYSFS_PREALLOC 010000 + #define __ATTR(_name, _mode, _show, _store) { \ .attr = {.name = __stringify(_name), \ .mode = VERIFY_OCTAL_PERMISSIONS(_mode) }, \ @@ -77,6 +79,13 @@ struct attribute_group { .store = _store, \ } +#define __ATTR_PREALLOC(_name, _mode, _show, _store) { \ + .attr = {.name = __stringify(_name), \ + .mode = SYSFS_PREALLOC | VERIFY_OCTAL_PERMISSIONS(_mode) },\ + .show = _show, \ + .store = _store, \ +} + #define __ATTR_RO(_name) { \ .attr = { .name = __stringify(_name), .mode = S_IRUGO }, \ .show = _name##_show, \ -- cgit v1.2.3 From 5aaba36318e5995e8c95d077a46d9a4d00fcc1cd Mon Sep 17 00:00:00 2001 From: Sudeep Holla Date: Tue, 30 Sep 2014 14:48:22 +0100 Subject: cpumask: factor out show_cpumap into separate helper function Many sysfs *_show function use cpu{list,mask}_scnprintf to copy cpumap to the buffer aligned to PAGE_SIZE, append '\n' and '\0' to return null terminated buffer with newline. This patch creates a new helper function cpumap_print_to_pagebuf in cpumask.h using newly added bitmap_print_to_pagebuf and consolidates most of those sysfs functions using the new helper function. Signed-off-by: Sudeep Holla Suggested-by: Stephen Boyd Tested-by: Stephen Boyd Acked-by: "Rafael J. Wysocki" Acked-by: Bjorn Helgaas Acked-by: Peter Zijlstra (Intel) Cc: Greg Kroah-Hartman Cc: x86@kernel.org Cc: linux-acpi@vger.kernel.org Cc: linux-pci@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- include/linux/bitmap.h | 3 +++ include/linux/cpumask.h | 17 +++++++++++++++++ 2 files changed, 20 insertions(+) (limited to 'include/linux') diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h index e1c8d080c427..9d5c3224a1e2 100644 --- a/include/linux/bitmap.h +++ b/include/linux/bitmap.h @@ -60,6 +60,7 @@ * bitmap_find_free_region(bitmap, bits, order) Find and allocate bit region * bitmap_release_region(bitmap, pos, order) Free specified bit region * bitmap_allocate_region(bitmap, pos, order) Allocate specified bit region + * bitmap_print_to_pagebuf(list, buf, mask, nbits) Print bitmap src as list/hex */ /* @@ -145,6 +146,8 @@ extern void bitmap_release_region(unsigned long *bitmap, unsigned int pos, int o extern int bitmap_allocate_region(unsigned long *bitmap, unsigned int pos, int order); extern void bitmap_copy_le(void *dst, const unsigned long *src, int nbits); extern int bitmap_ord_to_pos(const unsigned long *bitmap, int n, int bits); +extern int bitmap_print_to_pagebuf(bool list, char *buf, + const unsigned long *maskp, int nmaskbits); #define BITMAP_FIRST_WORD_MASK(start) (~0UL << ((start) % BITS_PER_LONG)) #define BITMAP_LAST_WORD_MASK(nbits) \ diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h index 0a9a6da21e74..b950e9d6008b 100644 --- a/include/linux/cpumask.h +++ b/include/linux/cpumask.h @@ -803,6 +803,23 @@ static inline const struct cpumask *get_cpu_mask(unsigned int cpu) } #endif /* NR_CPUS > BITS_PER_LONG */ +/** + * cpumap_print_to_pagebuf - copies the cpumask into the buffer either + * as comma-separated list of cpus or hex values of cpumask + * @list: indicates whether the cpumap must be list + * @mask: the cpumask to copy + * @buf: the buffer to copy into + * + * Returns the length of the (null-terminated) @buf string, zero if + * nothing is copied. + */ +static inline ssize_t +cpumap_print_to_pagebuf(bool list, char *buf, const struct cpumask *mask) +{ + return bitmap_print_to_pagebuf(list, buf, cpumask_bits(mask), + nr_cpumask_bits); +} + /* * * From here down, all obsolete. Use cpumask_ variants! -- cgit v1.2.3 From 3d52943b3a51497a777e6d7d840a38596a92cee9 Mon Sep 17 00:00:00 2001 From: Sudeep Holla Date: Tue, 30 Sep 2014 14:48:24 +0100 Subject: drivers: base: add cpu_device_create to support per-cpu devices This patch adds a new function to create per-cpu devices. This helps in: 1. reusing the device infrastructure to create any cpu related attributes and corresponding sysfs instead of creating and dealing with raw kobjects directly 2. retaining the legacy path(/sys/devices/system/cpu/..) to support existing sysfs ABI 3. avoiding to create links in the bus directory pointing to the device as there would be per-cpu instance of these devices with the same name since dev->bus is not populated to cpu_sysbus on purpose Signed-off-by: Sudeep Holla Tested-by: Stephen Boyd Cc: Greg Kroah-Hartman Cc: David Herrmann Cc: Kay Sievers Signed-off-by: Greg Kroah-Hartman --- include/linux/cpu.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include/linux') diff --git a/include/linux/cpu.h b/include/linux/cpu.h index b2d9a43012b2..4260e8594bd7 100644 --- a/include/linux/cpu.h +++ b/include/linux/cpu.h @@ -19,6 +19,7 @@ struct device; struct device_node; +struct attribute_group; struct cpu { int node_id; /* The node which contains the CPU */ @@ -39,6 +40,9 @@ extern void cpu_remove_dev_attr(struct device_attribute *attr); extern int cpu_add_dev_attr_group(struct attribute_group *attrs); extern void cpu_remove_dev_attr_group(struct attribute_group *attrs); +extern struct device *cpu_device_create(struct device *parent, void *drvdata, + const struct attribute_group **groups, + const char *fmt, ...); #ifdef CONFIG_HOTPLUG_CPU extern void unregister_cpu(struct cpu *cpu); extern ssize_t arch_cpu_probe(const char *, size_t); -- cgit v1.2.3 From 246246cbde5e840012f853e27630ebb59f409486 Mon Sep 17 00:00:00 2001 From: Sudeep Holla Date: Tue, 30 Sep 2014 14:48:25 +0100 Subject: drivers: base: support cpu cache information interface to userspace via sysfs This patch adds initial support for providing processor cache information to userspace through sysfs interface. This is based on already existing implementations(x86, ia64, s390 and powerpc) and hence the interface is intended to be fully compatible. The main purpose of this generic support is to avoid further code duplication to support new architectures and also to unify all the existing different implementations. This implementation maintains the hierarchy of cache objects which reflects the system's cache topology. Cache devices are instantiated as needed as CPUs come online. The cache information is replicated per-cpu even if they are shared. A per-cpu array of cache information maintained is used mainly for sysfs-related book keeping. It also implements the shared_cpu_map attribute, which is essential for enabling both kernel and user-space to discover the system's overall cache topology. This patch also add the missing ABI documentation for the cacheinfo sysfs interface already, which is well defined and widely used. Signed-off-by: Sudeep Holla Reviewed-by: Stephen Boyd Tested-by: Stephen Boyd Cc: Greg Kroah-Hartman Cc: linux-api@vger.kernel.org Cc: linux390@de.ibm.com Cc: linux-arm-kernel@lists.infradead.org Cc: linux-ia64@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-s390@vger.kernel.org Cc: x86@kernel.org Signed-off-by: Greg Kroah-Hartman --- include/linux/cacheinfo.h | 100 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 100 insertions(+) create mode 100644 include/linux/cacheinfo.h (limited to 'include/linux') diff --git a/include/linux/cacheinfo.h b/include/linux/cacheinfo.h new file mode 100644 index 000000000000..3daf5ed392c9 --- /dev/null +++ b/include/linux/cacheinfo.h @@ -0,0 +1,100 @@ +#ifndef _LINUX_CACHEINFO_H +#define _LINUX_CACHEINFO_H + +#include +#include +#include + +struct device_node; +struct attribute; + +enum cache_type { + CACHE_TYPE_NOCACHE = 0, + CACHE_TYPE_INST = BIT(0), + CACHE_TYPE_DATA = BIT(1), + CACHE_TYPE_SEPARATE = CACHE_TYPE_INST | CACHE_TYPE_DATA, + CACHE_TYPE_UNIFIED = BIT(2), +}; + +/** + * struct cacheinfo - represent a cache leaf node + * @type: type of the cache - data, inst or unified + * @level: represents the hierarcy in the multi-level cache + * @coherency_line_size: size of each cache line usually representing + * the minimum amount of data that gets transferred from memory + * @number_of_sets: total number of sets, a set is a collection of cache + * lines sharing the same index + * @ways_of_associativity: number of ways in which a particular memory + * block can be placed in the cache + * @physical_line_partition: number of physical cache lines sharing the + * same cachetag + * @size: Total size of the cache + * @shared_cpu_map: logical cpumask representing all the cpus sharing + * this cache node + * @attributes: bitfield representing various cache attributes + * @of_node: if devicetree is used, this represents either the cpu node in + * case there's no explicit cache node or the cache node itself in the + * device tree + * @disable_sysfs: indicates whether this node is visible to the user via + * sysfs or not + * @priv: pointer to any private data structure specific to particular + * cache design + * + * While @of_node, @disable_sysfs and @priv are used for internal book + * keeping, the remaining members form the core properties of the cache + */ +struct cacheinfo { + enum cache_type type; + unsigned int level; + unsigned int coherency_line_size; + unsigned int number_of_sets; + unsigned int ways_of_associativity; + unsigned int physical_line_partition; + unsigned int size; + cpumask_t shared_cpu_map; + unsigned int attributes; +#define CACHE_WRITE_THROUGH BIT(0) +#define CACHE_WRITE_BACK BIT(1) +#define CACHE_WRITE_POLICY_MASK \ + (CACHE_WRITE_THROUGH | CACHE_WRITE_BACK) +#define CACHE_READ_ALLOCATE BIT(2) +#define CACHE_WRITE_ALLOCATE BIT(3) +#define CACHE_ALLOCATE_POLICY_MASK \ + (CACHE_READ_ALLOCATE | CACHE_WRITE_ALLOCATE) + + struct device_node *of_node; + bool disable_sysfs; + void *priv; +}; + +struct cpu_cacheinfo { + struct cacheinfo *info_list; + unsigned int num_levels; + unsigned int num_leaves; +}; + +/* + * Helpers to make sure "func" is executed on the cpu whose cache + * attributes are being detected + */ +#define DEFINE_SMP_CALL_CACHE_FUNCTION(func) \ +static inline void _##func(void *ret) \ +{ \ + int cpu = smp_processor_id(); \ + *(int *)ret = __##func(cpu); \ +} \ + \ +int func(unsigned int cpu) \ +{ \ + int ret; \ + smp_call_function_single(cpu, _##func, &ret, true); \ + return ret; \ +} + +struct cpu_cacheinfo *get_cpu_cacheinfo(unsigned int cpu); +int init_cache_level(unsigned int cpu); +int populate_cache_leaves(unsigned int cpu); + +const struct attribute_group *cache_get_priv_group(struct cacheinfo *this_leaf); + +#endif /* _LINUX_CACHEINFO_H */ -- cgit v1.2.3 From 72c72bdf7bf53353d2d8e055194d27f0128be92b Mon Sep 17 00:00:00 2001 From: Anna Schumaker Date: Fri, 7 Nov 2014 14:44:25 -0500 Subject: VFS: Rename do_fallocate() to vfs_fallocate() This function needs to be exported so it can be used by the NFSD module when responding to the new ALLOCATE and DEALLOCATE operations in NFS v4.2. Christoph Hellwig suggested renaming the function to stay consistent with how other vfs functions are named. Signed-off-by: Anna Schumaker Signed-off-by: J. Bruce Fields --- include/linux/fs.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/fs.h b/include/linux/fs.h index a957d4366c24..a88718677579 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2032,7 +2032,7 @@ struct filename { extern long vfs_truncate(struct path *, loff_t); extern int do_truncate(struct dentry *, loff_t start, unsigned int time_attrs, struct file *filp); -extern int do_fallocate(struct file *file, int mode, loff_t offset, +extern int vfs_fallocate(struct file *file, int mode, loff_t offset, loff_t len); extern long do_sys_open(int dfd, const char __user *filename, int flags, umode_t mode); -- cgit v1.2.3 From a06ae8609b3dd06b957a6e4e965772a8a14d3af5 Mon Sep 17 00:00:00 2001 From: Pratik Patel Date: Mon, 3 Nov 2014 11:07:35 -0700 Subject: coresight: add CoreSight core layer framework CoreSight components are compliant with the ARM CoreSight architecture specification and can be connected in various topologies to suit a particular SoC tracing needs. These trace components can generally be classified as sources, links and sinks. Trace data produced by one or more sources flows through the intermediate links connecting the source to the currently selected sink. The CoreSight framework provides an interface for the CoreSight trace drivers to register themselves with. It's intended to build up a topological view of the CoreSight components and configure the correct serie of components on user input via sysfs. For eg., when enabling a source, the framework builds up a path consisting of all the components connecting the source to the currently selected sink(s) and enables all of them. The framework also supports switching between available sinks and provides status information to user space applications through the debugfs interface. Signed-off-by: Pratik Patel Signed-off-by: Mathieu Poirier Signed-off-by: Greg Kroah-Hartman --- include/linux/amba/bus.h | 1 + include/linux/coresight.h | 263 ++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 264 insertions(+) create mode 100644 include/linux/coresight.h (limited to 'include/linux') diff --git a/include/linux/amba/bus.h b/include/linux/amba/bus.h index c324f5700d1a..d024bd9c9d9b 100644 --- a/include/linux/amba/bus.h +++ b/include/linux/amba/bus.h @@ -23,6 +23,7 @@ #define AMBA_NR_IRQS 9 #define AMBA_CID 0xb105f00d +#define CORESIGHT_CID 0xb105900d struct clk; diff --git a/include/linux/coresight.h b/include/linux/coresight.h new file mode 100644 index 000000000000..bdde4199c74a --- /dev/null +++ b/include/linux/coresight.h @@ -0,0 +1,263 @@ +/* Copyright (c) 2012, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef _LINUX_CORESIGHT_H +#define _LINUX_CORESIGHT_H + +#include + +/* Peripheral id registers (0xFD0-0xFEC) */ +#define CORESIGHT_PERIPHIDR4 0xfd0 +#define CORESIGHT_PERIPHIDR5 0xfd4 +#define CORESIGHT_PERIPHIDR6 0xfd8 +#define CORESIGHT_PERIPHIDR7 0xfdC +#define CORESIGHT_PERIPHIDR0 0xfe0 +#define CORESIGHT_PERIPHIDR1 0xfe4 +#define CORESIGHT_PERIPHIDR2 0xfe8 +#define CORESIGHT_PERIPHIDR3 0xfeC +/* Component id registers (0xFF0-0xFFC) */ +#define CORESIGHT_COMPIDR0 0xff0 +#define CORESIGHT_COMPIDR1 0xff4 +#define CORESIGHT_COMPIDR2 0xff8 +#define CORESIGHT_COMPIDR3 0xffC + +#define ETM_ARCH_V3_3 0x23 +#define ETM_ARCH_V3_5 0x25 +#define PFT_ARCH_V1_0 0x30 +#define PFT_ARCH_V1_1 0x31 + +#define CORESIGHT_UNLOCK 0xc5acce55 + +extern struct bus_type coresight_bustype; + +enum coresight_dev_type { + CORESIGHT_DEV_TYPE_NONE, + CORESIGHT_DEV_TYPE_SINK, + CORESIGHT_DEV_TYPE_LINK, + CORESIGHT_DEV_TYPE_LINKSINK, + CORESIGHT_DEV_TYPE_SOURCE, +}; + +enum coresight_dev_subtype_sink { + CORESIGHT_DEV_SUBTYPE_SINK_NONE, + CORESIGHT_DEV_SUBTYPE_SINK_PORT, + CORESIGHT_DEV_SUBTYPE_SINK_BUFFER, +}; + +enum coresight_dev_subtype_link { + CORESIGHT_DEV_SUBTYPE_LINK_NONE, + CORESIGHT_DEV_SUBTYPE_LINK_MERG, + CORESIGHT_DEV_SUBTYPE_LINK_SPLIT, + CORESIGHT_DEV_SUBTYPE_LINK_FIFO, +}; + +enum coresight_dev_subtype_source { + CORESIGHT_DEV_SUBTYPE_SOURCE_NONE, + CORESIGHT_DEV_SUBTYPE_SOURCE_PROC, + CORESIGHT_DEV_SUBTYPE_SOURCE_BUS, + CORESIGHT_DEV_SUBTYPE_SOURCE_SOFTWARE, +}; + +/** + * struct coresight_dev_subtype - further characterisation of a type + * @sink_subtype: type of sink this component is, as defined + by @coresight_dev_subtype_sink. + * @link_subtype: type of link this component is, as defined + by @coresight_dev_subtype_link. + * @source_subtype: type of source this component is, as defined + by @coresight_dev_subtype_source. + */ +struct coresight_dev_subtype { + enum coresight_dev_subtype_sink sink_subtype; + enum coresight_dev_subtype_link link_subtype; + enum coresight_dev_subtype_source source_subtype; +}; + +/** + * struct coresight_platform_data - data harvested from the DT specification + * @cpu: the CPU a source belongs to. Only applicable for ETM/PTMs. + * @name: name of the component as shown under sysfs. + * @nr_inport: number of input ports for this component. + * @outports: list of remote enpoint port number. + * @child_names:name of all child components connected to this device. + * @child_ports:child component port number the current component is + connected to. + * @nr_outport: number of output ports for this component. + * @clk: The clock this component is associated to. + */ +struct coresight_platform_data { + int cpu; + const char *name; + int nr_inport; + int *outports; + const char **child_names; + int *child_ports; + int nr_outport; + struct clk *clk; +}; + +/** + * struct coresight_desc - description of a component required from drivers + * @type: as defined by @coresight_dev_type. + * @subtype: as defined by @coresight_dev_subtype. + * @ops: generic operations for this component, as defined + by @coresight_ops. + * @pdata: platform data collected from DT. + * @dev: The device entity associated to this component. + * @groups :operations specific to this component. These will end up + in the component's sysfs sub-directory. + */ +struct coresight_desc { + enum coresight_dev_type type; + struct coresight_dev_subtype subtype; + const struct coresight_ops *ops; + struct coresight_platform_data *pdata; + struct device *dev; + const struct attribute_group **groups; +}; + +/** + * struct coresight_connection - representation of a single connection + * @ref_count: keeping count a port' references. + * @outport: a connection's output port number. + * @chid_name: remote component's name. + * @child_port: remote component's port number @output is connected to. + * @child_dev: a @coresight_device representation of the component + connected to @outport. + */ +struct coresight_connection { + int outport; + const char *child_name; + int child_port; + struct coresight_device *child_dev; +}; + +/** + * struct coresight_device - representation of a device as used by the framework + * @nr_inport: number of input port associated to this component. + * @nr_outport: number of output port associated to this component. + * @type: as defined by @coresight_dev_type. + * @subtype: as defined by @coresight_dev_subtype. + * @ops: generic operations for this component, as defined + by @coresight_ops. + * @dev: The device entity associated to this component. + * @refcnt: keep track of what is in use. + * @path_link: link of current component into the path being enabled. + * @orphan: true if the component has connections that haven't been linked. + * @enable: 'true' if component is currently part of an active path. + * @activated: 'true' only if a _sink_ has been activated. A sink can be + activated but not yet enabled. Enabling for a _sink_ + happens when a source has been selected for that it. + */ +struct coresight_device { + struct coresight_connection *conns; + int nr_inport; + int nr_outport; + enum coresight_dev_type type; + struct coresight_dev_subtype subtype; + const struct coresight_ops *ops; + struct device dev; + atomic_t *refcnt; + struct list_head path_link; + bool orphan; + bool enable; /* true only if configured as part of a path */ + bool activated; /* true only if a sink is part of a path */ +}; + +#define to_coresight_device(d) container_of(d, struct coresight_device, dev) + +#define source_ops(csdev) csdev->ops->source_ops +#define sink_ops(csdev) csdev->ops->sink_ops +#define link_ops(csdev) csdev->ops->link_ops + +#define CORESIGHT_DEBUGFS_ENTRY(__name, __entry_name, \ + __mode, __get, __set, __fmt) \ +DEFINE_SIMPLE_ATTRIBUTE(__name ## _ops, __get, __set, __fmt); \ +static const struct coresight_ops_entry __name ## _entry = { \ + .name = __entry_name, \ + .mode = __mode, \ + .ops = &__name ## _ops \ +} + +/** + * struct coresight_ops_sink - basic operations for a sink + * Operations available for sinks + * @enable: enables the sink. + * @disable: disables the sink. + */ +struct coresight_ops_sink { + int (*enable)(struct coresight_device *csdev); + void (*disable)(struct coresight_device *csdev); +}; + +/** + * struct coresight_ops_link - basic operations for a link + * Operations available for links. + * @enable: enables flow between iport and oport. + * @disable: disables flow between iport and oport. + */ +struct coresight_ops_link { + int (*enable)(struct coresight_device *csdev, int iport, int oport); + void (*disable)(struct coresight_device *csdev, int iport, int oport); +}; + +/** + * struct coresight_ops_source - basic operations for a source + * Operations available for sources. + * @trace_id: returns the value of the component's trace ID as known + to the HW. + * @enable: enables tracing from a source. + * @disable: disables tracing for a source. + */ +struct coresight_ops_source { + int (*trace_id)(struct coresight_device *csdev); + int (*enable)(struct coresight_device *csdev); + void (*disable)(struct coresight_device *csdev); +}; + +struct coresight_ops { + const struct coresight_ops_sink *sink_ops; + const struct coresight_ops_link *link_ops; + const struct coresight_ops_source *source_ops; +}; + +#ifdef CONFIG_CORESIGHT +extern struct coresight_device * +coresight_register(struct coresight_desc *desc); +extern void coresight_unregister(struct coresight_device *csdev); +extern int coresight_enable(struct coresight_device *csdev); +extern void coresight_disable(struct coresight_device *csdev); +extern int coresight_is_bit_set(u32 val, int position, int value); +extern int coresight_timeout(void __iomem *addr, u32 offset, + int position, int value); +#ifdef CONFIG_OF +extern struct coresight_platform_data *of_get_coresight_platform_data( + struct device *dev, struct device_node *node); +#endif +#else +static inline struct coresight_device * +coresight_register(struct coresight_desc *desc) { return NULL; } +static inline void coresight_unregister(struct coresight_device *csdev) {} +static inline int +coresight_enable(struct coresight_device *csdev) { return -ENOSYS; } +static inline void coresight_disable(struct coresight_device *csdev) {} +static inline int coresight_is_bit_set(u32 val, int position, int value) + { return 0; } +static inline int coresight_timeout(void __iomem *addr, u32 offset, + int position, int value) { return 1; } +#ifdef CONFIG_OF +static inline struct coresight_platform_data *of_get_coresight_platform_data( + struct device *dev, struct device_node *node) { return NULL; } +#endif +#endif + +#endif -- cgit v1.2.3 From 332fd7c4fef5f3b166e93decb07fd69eb24f7998 Mon Sep 17 00:00:00 2001 From: Kevin Cernekee Date: Thu, 6 Nov 2014 22:44:17 -0800 Subject: genirq: Generic chip: Change irq_reg_{readl,writel} arguments Pass in the irq_chip_generic struct so we can use different readl/writel settings for each irqchip driver, when appropriate. Compute (gc->reg_base + reg_offset) in the helper function because this is pretty much what all callers want to do anyway. Compile-tested using the following configurations: at91_dt_defconfig (CONFIG_ATMEL_AIC_IRQ=y) sama5_defconfig (CONFIG_ATMEL_AIC5_IRQ=y) sunxi_defconfig (CONFIG_ARCH_SUNXI=y) tb10x (ARC) is untested. Signed-off-by: Kevin Cernekee Acked-by: Thomas Gleixner Acked-by: Acked-by: Arnd Bergmann Link: https://lkml.kernel.org/r/1415342669-30640-3-git-send-email-cernekee@gmail.com Signed-off-by: Jason Cooper --- include/linux/irq.h | 20 +++++++++++++------- 1 file changed, 13 insertions(+), 7 deletions(-) (limited to 'include/linux') diff --git a/include/linux/irq.h b/include/linux/irq.h index 03f48d936f66..ed1135d32d80 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -20,6 +20,7 @@ #include #include #include +#include #include #include @@ -639,13 +640,6 @@ void arch_teardown_hwirq(unsigned int irq); void irq_init_desc(unsigned int irq); #endif -#ifndef irq_reg_writel -# define irq_reg_writel(val, addr) writel(val, addr) -#endif -#ifndef irq_reg_readl -# define irq_reg_readl(addr) readl(addr) -#endif - /** * struct irq_chip_regs - register offsets for struct irq_gci * @enable: Enable register offset to reg_base @@ -821,4 +815,16 @@ static inline void irq_gc_lock(struct irq_chip_generic *gc) { } static inline void irq_gc_unlock(struct irq_chip_generic *gc) { } #endif +static inline void irq_reg_writel(struct irq_chip_generic *gc, + u32 val, int reg_offset) +{ + writel(val, gc->reg_base + reg_offset); +} + +static inline u32 irq_reg_readl(struct irq_chip_generic *gc, + int reg_offset) +{ + return readl(gc->reg_base + reg_offset); +} + #endif /* _LINUX_IRQ_H */ -- cgit v1.2.3 From 2b28037632b1e62b92c0616f08652d806008c80d Mon Sep 17 00:00:00 2001 From: Kevin Cernekee Date: Thu, 6 Nov 2014 22:44:18 -0800 Subject: genirq: Generic chip: Allow irqchip drivers to override irq_reg_{readl,writel} Currently, these I/O accessors always assume little endian 32-bit registers (readl/writel). On some systems the IRQ registers need to be accessed in BE mode or using 16-bit loads/stores, so we will provide a way to override the default behavior. Signed-off-by: Kevin Cernekee Acked-by: Thomas Gleixner Acked-by: Acked-by: Arnd Bergmann Link: https://lkml.kernel.org/r/1415342669-30640-4-git-send-email-cernekee@gmail.com Signed-off-by: Jason Cooper --- include/linux/irq.h | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/irq.h b/include/linux/irq.h index ed1135d32d80..0fecd95ba271 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -686,6 +686,8 @@ struct irq_chip_type { * struct irq_chip_generic - Generic irq chip data structure * @lock: Lock to protect register and cache data access * @reg_base: Register base address (virtual) + * @reg_readl: Alternate I/O accessor (defaults to readl if NULL) + * @reg_writel: Alternate I/O accessor (defaults to writel if NULL) * @irq_base: Interrupt base nr for this chip * @irq_cnt: Number of interrupts handled by this chip * @mask_cache: Cached mask register shared between all chip types @@ -710,6 +712,8 @@ struct irq_chip_type { struct irq_chip_generic { raw_spinlock_t lock; void __iomem *reg_base; + u32 (*reg_readl)(void __iomem *addr); + void (*reg_writel)(u32 val, void __iomem *addr); unsigned int irq_base; unsigned int irq_cnt; u32 mask_cache; @@ -818,13 +822,19 @@ static inline void irq_gc_unlock(struct irq_chip_generic *gc) { } static inline void irq_reg_writel(struct irq_chip_generic *gc, u32 val, int reg_offset) { - writel(val, gc->reg_base + reg_offset); + if (gc->reg_writel) + gc->reg_writel(val, gc->reg_base + reg_offset); + else + writel(val, gc->reg_base + reg_offset); } static inline u32 irq_reg_readl(struct irq_chip_generic *gc, int reg_offset) { - return readl(gc->reg_base + reg_offset); + if (gc->reg_readl) + return gc->reg_readl(gc->reg_base + reg_offset); + else + return readl(gc->reg_base + reg_offset); } #endif /* _LINUX_IRQ_H */ -- cgit v1.2.3 From b79055952badbd73710685643bab44104f2509ea Mon Sep 17 00:00:00 2001 From: Kevin Cernekee Date: Thu, 6 Nov 2014 22:44:19 -0800 Subject: genirq: Generic chip: Add big endian I/O accessors Use io{read,write}32be if the caller specified IRQ_GC_BE_IO when creating the irqchip. Signed-off-by: Kevin Cernekee Acked-by: Thomas Gleixner Acked-by: Acked-by: Arnd Bergmann Link: https://lkml.kernel.org/r/1415342669-30640-5-git-send-email-cernekee@gmail.com Signed-off-by: Jason Cooper --- include/linux/irq.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/linux') diff --git a/include/linux/irq.h b/include/linux/irq.h index 0fecd95ba271..8588e5efe577 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -738,12 +738,14 @@ struct irq_chip_generic { * the parent irq. Usually GPIO implementations * @IRQ_GC_MASK_CACHE_PER_TYPE: Mask cache is chip type private * @IRQ_GC_NO_MASK: Do not calculate irq_data->mask + * @IRQ_GC_BE_IO: Use big-endian register accesses (default: LE) */ enum irq_gc_flags { IRQ_GC_INIT_MASK_CACHE = 1 << 0, IRQ_GC_INIT_NESTED_LOCK = 1 << 1, IRQ_GC_MASK_CACHE_PER_TYPE = 1 << 2, IRQ_GC_NO_MASK = 1 << 3, + IRQ_GC_BE_IO = 1 << 4, }; /* -- cgit v1.2.3 From 6bab3596bbede980c067eaeaf6a470c262888dac Mon Sep 17 00:00:00 2001 From: Jan Kara Date: Mon, 20 Oct 2014 16:01:33 +0200 Subject: quota: Remove const from function declarations We don't use const through VFS too much so just remove it from quota function declarations. Signed-off-by: Jan Kara --- include/linux/quotaops.h | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'include/linux') diff --git a/include/linux/quotaops.h b/include/linux/quotaops.h index 1d3eee594cd6..f23538a6e411 100644 --- a/include/linux/quotaops.h +++ b/include/linux/quotaops.h @@ -64,10 +64,10 @@ void dquot_destroy(struct dquot *dquot); int __dquot_alloc_space(struct inode *inode, qsize_t number, int flags); void __dquot_free_space(struct inode *inode, qsize_t number, int flags); -int dquot_alloc_inode(const struct inode *inode); +int dquot_alloc_inode(struct inode *inode); int dquot_claim_space_nodirty(struct inode *inode, qsize_t number); -void dquot_free_inode(const struct inode *inode); +void dquot_free_inode(struct inode *inode); void dquot_reclaim_space_nodirty(struct inode *inode, qsize_t number); int dquot_disable(struct super_block *sb, int type, unsigned int flags); @@ -213,12 +213,12 @@ static inline void dquot_drop(struct inode *inode) { } -static inline int dquot_alloc_inode(const struct inode *inode) +static inline int dquot_alloc_inode(struct inode *inode) { return 0; } -static inline void dquot_free_inode(const struct inode *inode) +static inline void dquot_free_inode(struct inode *inode) { } -- cgit v1.2.3 From 2c5f648aa24a7c8f0668d8ce5722d69da5bef739 Mon Sep 17 00:00:00 2001 From: Jan Kara Date: Tue, 30 Sep 2014 10:43:09 +0200 Subject: quota: Allow each filesystem to specify which quota types it supports Currently all filesystems supporting VFS quota support user and group quotas. With introduction of project quotas this is going to change so make sure filesystem isn't called for quota type it doesn't support by introduction of a bitmask determining which quota types each filesystem supports. Acked-by: Christoph Hellwig Signed-off-by: Jan Kara --- include/linux/fs.h | 1 + include/linux/quota.h | 5 +++++ 2 files changed, 6 insertions(+) (limited to 'include/linux') diff --git a/include/linux/fs.h b/include/linux/fs.h index 9ab779e8a63c..cf55a5483d40 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1224,6 +1224,7 @@ struct super_block { struct backing_dev_info *s_bdi; struct mtd_info *s_mtd; struct hlist_node s_instances; + unsigned int s_quota_types; /* Bitmask of supported quota types */ struct quota_info s_dquot; /* Diskquota specific options */ struct sb_writers s_writers; diff --git a/include/linux/quota.h b/include/linux/quota.h index 80d345a3524c..50978b781a19 100644 --- a/include/linux/quota.h +++ b/include/linux/quota.h @@ -56,6 +56,11 @@ enum quota_type { PRJQUOTA = 2, /* element used for project quotas */ }; +/* Masks for quota types when used as a bitmask */ +#define QTYPE_MASK_USR (1 << USRQUOTA) +#define QTYPE_MASK_GRP (1 << GRPQUOTA) +#define QTYPE_MASK_PRJ (1 << PRJQUOTA) + typedef __kernel_uid32_t qid_t; /* Type in which we store ids in memory */ typedef long long qsize_t; /* Type in which we store sizes */ -- cgit v1.2.3 From 2d0fa467915ed0c5957c992011b7f142a7dedf8e Mon Sep 17 00:00:00 2001 From: Jan Kara Date: Thu, 25 Sep 2014 16:36:14 +0200 Subject: quota: Use function to provide i_dquot pointers i_dquot array is used by relatively few filesystems (ext?, ocfs2, jfs, reiserfs) so it is beneficial to move this array to fs-private part of the inode. We cannot just pass quota pointers from filesystems to quota functions because during quotaon and quotaoff we have to traverse list of all inodes and manipulate i_dquot pointers for each inode. So we provide a function which generic quota code can use to get pointer to the i_dquot array from the filesystem. Acked-by: Christoph Hellwig Signed-off-by: Jan Kara --- include/linux/fs.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/fs.h b/include/linux/fs.h index cf55a5483d40..8c093ad49522 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1591,6 +1591,7 @@ struct super_operations { #ifdef CONFIG_QUOTA ssize_t (*quota_read)(struct super_block *, int, char *, size_t, loff_t); ssize_t (*quota_write)(struct super_block *, int, const char *, size_t, loff_t); + struct dquot **(*get_dquots)(struct inode *); #endif int (*bdev_try_to_free_page)(struct super_block*, struct page*, gfp_t); long (*nr_cached_objects)(struct super_block *, int); -- cgit v1.2.3 From 75cbe701a4251fcd8b846d52ae42f88c9a8e5e93 Mon Sep 17 00:00:00 2001 From: Jan Kara Date: Mon, 29 Sep 2014 15:10:26 +0200 Subject: vfs: Remove i_dquot field from inode All filesystems using VFS quotas are now converted to use their private i_dquot fields. Remove the i_dquot field from generic inode structure. Acked-by: Christoph Hellwig Signed-off-by: Jan Kara --- include/linux/fs.h | 3 --- 1 file changed, 3 deletions(-) (limited to 'include/linux') diff --git a/include/linux/fs.h b/include/linux/fs.h index 8c093ad49522..6eb5337688bd 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -606,9 +606,6 @@ struct inode { const struct file_operations *i_fop; /* former ->i_op->default_file_ops */ struct file_lock *i_flock; struct address_space i_data; -#ifdef CONFIG_QUOTA - struct dquot *i_dquot[MAXQUOTAS]; -#endif struct list_head i_devices; union { struct pipe_inode_info *i_pipe; -- cgit v1.2.3 From 179e20b8df97e0c7541a1bae30cad53ecc7a5e86 Mon Sep 17 00:00:00 2001 From: Andreas Gruenbacher Date: Mon, 10 Nov 2014 17:21:09 +0100 Subject: drbd: Minor cleanups . Update comments . drbd_set_{in,out_of}_sync(): Remove unused parameters . Move common code into adm_del_resource() . Redefine ERR_MINOR_EXISTS -> ERR_MINOR_OR_VOLUME_EXISTS Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg Signed-off-by: Jens Axboe --- include/linux/drbd.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/drbd.h b/include/linux/drbd.h index debb70d40547..8723f2a99e15 100644 --- a/include/linux/drbd.h +++ b/include/linux/drbd.h @@ -172,7 +172,7 @@ enum drbd_ret_code { ERR_RES_NOT_KNOWN = 158, ERR_RES_IN_USE = 159, ERR_MINOR_CONFIGURED = 160, - ERR_MINOR_EXISTS = 161, + ERR_MINOR_OR_VOLUME_EXISTS = 161, ERR_INVALID_REQUEST = 162, ERR_NEED_APV_100 = 163, ERR_NEED_ALLOW_TWO_PRI = 164, -- cgit v1.2.3 From 3b47d30396bae4f0bd1ff0dbcd7c4f5077e7df4e Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Thu, 6 Nov 2014 21:09:44 -0800 Subject: net: gro: add a per device gro flush timer Tuning coalescing parameters on NIC can be really hard. Servers can handle both bulk and RPC like traffic, with conflicting goals : bulk flows want as big GRO packets as possible, RPC want minimal latencies. To reach big GRO packets on 10Gbe NIC, one can use : ethtool -C eth0 rx-usecs 4 rx-frames 44 But this penalizes rpc sessions, with an increase of latencies, up to 50% in some cases, as NICs generally do not force an interrupt when a packet with TCP Push flag is received. Some NICs do not have an absolute timer, only a timer rearmed for every incoming packet. This patch uses a different strategy : Let GRO stack decides what do do, based on traffic pattern. Packets with Push flag wont be delayed. Packets without Push flag might be held in GRO engine, if we keep receiving data. This new mechanism is off by default, and shall be enabled by setting /sys/class/net/ethX/gro_flush_timeout to a value in nanosecond. To fully enable this mechanism, drivers should use napi_complete_done() instead of napi_complete(). Tested: Ran 200 netperf TCP_STREAM from A to B (10Gbe mlx4 link, 8 RX queues) Without this feature, we send back about 305,000 ACK per second. GRO aggregation ratio is low (811/305 = 2.65 segments per GRO packet) Setting a timer of 2000 nsec is enough to increase GRO packet sizes and reduce number of ACK packets. (811/19.2 = 42) Receiver performs less calls to upper stacks, less wakes up. This also reduces cpu usage on the sender, as it receives less ACK packets. Note that reducing number of wakes up increases cpu efficiency, but can decrease QPS, as applications wont have the chance to warmup cpu caches doing a partial read of RPC requests/answers if they fit in one skb. B:~# sar -n DEV 1 10 | grep eth0 | tail -1 Average: eth0 811269.80 305732.30 1199462.57 19705.72 0.00 0.00 0.50 B:~# echo 2000 >/sys/class/net/eth0/gro_flush_timeout B:~# sar -n DEV 1 10 | grep eth0 | tail -1 Average: eth0 811577.30 19230.80 1199916.51 1239.80 0.00 0.00 0.50 Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller --- include/linux/netdevice.h | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-) (limited to 'include/linux') diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 90ac95900a11..888d5513fa4a 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -314,6 +314,7 @@ struct napi_struct { struct net_device *dev; struct sk_buff *gro_list; struct sk_buff *skb; + struct hrtimer timer; struct list_head dev_list; struct hlist_node napi_hash_node; unsigned int napi_id; @@ -443,14 +444,19 @@ static inline bool napi_reschedule(struct napi_struct *napi) return false; } +void __napi_complete(struct napi_struct *n); +void napi_complete_done(struct napi_struct *n, int work_done); /** * napi_complete - NAPI processing complete * @n: napi context * * Mark NAPI processing as complete. + * Consider using napi_complete_done() instead. */ -void __napi_complete(struct napi_struct *n); -void napi_complete(struct napi_struct *n); +static inline void napi_complete(struct napi_struct *n) +{ + return napi_complete_done(n, 0); +} /** * napi_by_id - lookup a NAPI by napi_id @@ -485,14 +491,7 @@ void napi_hash_del(struct napi_struct *napi); * Stop NAPI from being scheduled on this context. * Waits till any outstanding processing completes. */ -static inline void napi_disable(struct napi_struct *n) -{ - might_sleep(); - set_bit(NAPI_STATE_DISABLE, &n->state); - while (test_and_set_bit(NAPI_STATE_SCHED, &n->state)) - msleep(1); - clear_bit(NAPI_STATE_DISABLE, &n->state); -} +void napi_disable(struct napi_struct *n); /** * napi_enable - enable NAPI scheduling @@ -1603,6 +1602,7 @@ struct net_device { #endif + unsigned long gro_flush_timeout; rx_handler_func_t __rcu *rx_handler; void __rcu *rx_handler_data; -- cgit v1.2.3 From d74bcaaeb66826192c9e361cbfe8fd1ffaccf74e Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen Date: Sun, 9 Nov 2014 17:00:59 +0100 Subject: ASoC: wm5102: Move ultrasonic response settings lock to the driver level The wm5102 driver currently uses the snd_soc_codec mutex to protect its ultrasonic response settings from concurrent access. This patch moves this lock to the driver level. This will allow us to eventually remove the snd_soc_codec mutex. Signed-off-by: Lars-Peter Clausen Acked-by: Charles Keepax Signed-off-by: Mark Brown --- include/linux/mfd/arizona/core.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/mfd/arizona/core.h b/include/linux/mfd/arizona/core.h index f34723f7663c..910e3aa1e965 100644 --- a/include/linux/mfd/arizona/core.h +++ b/include/linux/mfd/arizona/core.h @@ -141,6 +141,7 @@ struct arizona { uint16_t dac_comp_coeff; uint8_t dac_comp_enabled; + struct mutex dac_comp_lock; }; int arizona_clk32k_enable(struct arizona *arizona); -- cgit v1.2.3 From 2f35c41f58a978dfa44ffa102249d556caa99eeb Mon Sep 17 00:00:00 2001 From: Masami Hiramatsu Date: Mon, 10 Nov 2014 09:29:29 +1030 Subject: module: Replace module_ref with atomic_t refcnt Replace module_ref per-cpu complex reference counter with an atomic_t simple refcnt. This is for code simplification. Signed-off-by: Masami Hiramatsu Signed-off-by: Rusty Russell --- include/linux/module.h | 16 +--------------- 1 file changed, 1 insertion(+), 15 deletions(-) (limited to 'include/linux') diff --git a/include/linux/module.h b/include/linux/module.h index 71f282a4e307..ebfb0e153c6a 100644 --- a/include/linux/module.h +++ b/include/linux/module.h @@ -210,20 +210,6 @@ enum module_state { MODULE_STATE_UNFORMED, /* Still setting it up. */ }; -/** - * struct module_ref - per cpu module reference counts - * @incs: number of module get on this cpu - * @decs: number of module put on this cpu - * - * We force an alignment on 8 or 16 bytes, so that alloc_percpu() - * put @incs/@decs in same cache line, with no extra memory cost, - * since alloc_percpu() is fine grained. - */ -struct module_ref { - unsigned long incs; - unsigned long decs; -} __attribute((aligned(2 * sizeof(unsigned long)))); - struct module { enum module_state state; @@ -367,7 +353,7 @@ struct module { /* Destruction function. */ void (*exit)(void); - struct module_ref __percpu *refptr; + atomic_t refcnt; #endif #ifdef CONFIG_CONSTRUCTORS -- cgit v1.2.3 From cbd7f8d6825c6900daa9d6f1b363b592ea9ee1fa Mon Sep 17 00:00:00 2001 From: Paul Bolle Date: Mon, 10 Nov 2014 09:33:29 +1030 Subject: virtio: Fix comment typo 'CONFIG_S_FAILED' Without the VIRTIO_ prefix CONFIG_S_FAILED looks like a Kconfig macro. So use that prefix here too. Signed-off-by: Paul Bolle Acked-by: Cornelia Huck Signed-off-by: Rusty Russell --- include/linux/virtio.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/virtio.h b/include/linux/virtio.h index 65261a7244fc..abafae783058 100644 --- a/include/linux/virtio.h +++ b/include/linux/virtio.h @@ -78,7 +78,7 @@ bool virtqueue_is_broken(struct virtqueue *vq); /** * virtio_device - representation of a device using virtio * @index: unique position on the virtio bus - * @failed: saved value for CONFIG_S_FAILED bit (for restore) + * @failed: saved value for VIRTIO_CONFIG_S_FAILED bit (for restore) * @config_enabled: configuration change reporting enabled * @config_change_pending: configuration change reported while disabled * @config_lock: protects configuration change reporting -- cgit v1.2.3 From 4fd3279b48605ae3ea509b9b2c02e46aa0975930 Mon Sep 17 00:00:00 2001 From: "Steven Rostedt (Red Hat)" Date: Fri, 24 Oct 2014 17:56:04 -0400 Subject: ftrace: Add more information to ftrace_bug() output With the introduction of the dynamic trampolines, it is useful that if things go wrong that ftrace_bug() produces more information about what the current state is. This can help debug issues that may arise. Ftrace has lots of checks to make sure that the state of the system it touchs is exactly what it expects it to be. When it detects an abnormality it calls ftrace_bug() and disables itself to prevent any further damage. It is crucial that ftrace_bug() produces sufficient information that can be used to debug the situation. Cc: Benjamin Herrenschmidt Acked-by: Borislav Petkov Tested-by: Masami Hiramatsu Tested-by: Jiri Kosina Signed-off-by: Steven Rostedt --- include/linux/ftrace.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h index 06e3ca5a5083..619e37cc17fd 100644 --- a/include/linux/ftrace.h +++ b/include/linux/ftrace.h @@ -263,7 +263,9 @@ struct ftrace_func_command { int ftrace_arch_code_modify_prepare(void); int ftrace_arch_code_modify_post_process(void); -void ftrace_bug(int err, unsigned long ip); +struct dyn_ftrace; + +void ftrace_bug(int err, struct dyn_ftrace *rec); struct seq_file; -- cgit v1.2.3 From f8c6455bb04b944edb69e9b074e28efee2c56bdd Mon Sep 17 00:00:00 2001 From: Shani Michaeli Date: Sun, 9 Nov 2014 13:51:53 +0200 Subject: net/mlx4_en: Extend checksum offloading by CHECKSUM COMPLETE When processing received traffic, pass CHECKSUM_COMPLETE status to the stack, with calculated checksum for non TCP/UDP packets (such as GRE or ICMP). Although the stack expects checksum which doesn't include the pseudo header, the HW adds it. To address that, we are subtracting the pseudo header checksum from the checksum value provided by the HW. In the IPv6 case, we also compute/add the IP header checksum which is not added by the HW for such packets. Cc: Jerry Chu Signed-off-by: Shani Michaeli Signed-off-by: Matan Barak Signed-off-by: Or Gerlitz Signed-off-by: David S. Miller --- include/linux/mlx4/device.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h index 5cc5eac47d1b..3d9bff00f24a 100644 --- a/include/linux/mlx4/device.h +++ b/include/linux/mlx4/device.h @@ -497,6 +497,7 @@ struct mlx4_caps { u16 hca_core_clock; u64 phys_port_id[MLX4_MAX_PORTS + 1]; int tunnel_offload_mode; + u8 rx_checksum_flags_port[MLX4_MAX_PORTS + 1]; }; struct mlx4_buf_list { -- cgit v1.2.3 From 09626e9d153326ca82568e4e27f2daa53713992e Mon Sep 17 00:00:00 2001 From: WANG Cong Date: Tue, 11 Nov 2014 13:29:42 -0800 Subject: net: kill netif_copy_real_num_queues() vlan was the only user of netif_copy_real_num_queues(), but it no longer calls it after commit 4af429d29b341bb1735f04c2fb960178 ("vlan: lockless transmit path"). So we can just remove it. Cc: Eric Dumazet Cc: David S. Miller Signed-off-by: Cong Wang Signed-off-by: David S. Miller --- include/linux/netdevice.h | 17 ----------------- 1 file changed, 17 deletions(-) (limited to 'include/linux') diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 888d5513fa4a..4a6f770377d3 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -2762,23 +2762,6 @@ static inline int netif_set_real_num_rx_queues(struct net_device *dev, } #endif -static inline int netif_copy_real_num_queues(struct net_device *to_dev, - const struct net_device *from_dev) -{ - int err; - - err = netif_set_real_num_tx_queues(to_dev, - from_dev->real_num_tx_queues); - if (err) - return err; -#ifdef CONFIG_SYSFS - return netif_set_real_num_rx_queues(to_dev, - from_dev->real_num_rx_queues); -#else - return 0; -#endif -} - #ifdef CONFIG_SYSFS static inline unsigned int get_netdev_rx_queue_index( struct netdev_rx_queue *queue) -- cgit v1.2.3 From 85eb92e81801d64686eb78928d500a4c83ee9623 Mon Sep 17 00:00:00 2001 From: Hauke Mehrtens Date: Sat, 1 Nov 2014 16:54:55 +0100 Subject: bcma: make it possible to specify a IRQ num in bcma_core_irq() This moves bcma_core_irq() to main.c and add a extra parameter with a number so that we can return different irq number for devices with more than one. Signed-off-by: Hauke Mehrtens Signed-off-by: John W. Linville --- include/linux/bcma/bcma.h | 2 ++ include/linux/bcma/bcma_driver_mips.h | 4 ++-- 2 files changed, 4 insertions(+), 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/bcma/bcma.h b/include/linux/bcma/bcma.h index 729f48e6b20b..eb1c6a47b67f 100644 --- a/include/linux/bcma/bcma.h +++ b/include/linux/bcma/bcma.h @@ -447,4 +447,6 @@ extern u32 bcma_chipco_pll_read(struct bcma_drv_cc *cc, u32 offset); #define BCMA_DMA_TRANSLATION_DMA64_CMT 0x80000000 /* Client Mode Translation for 64-bit DMA */ extern u32 bcma_core_dma_translation(struct bcma_device *core); +extern unsigned int bcma_core_irq(struct bcma_device *core, int num); + #endif /* LINUX_BCMA_H_ */ diff --git a/include/linux/bcma/bcma_driver_mips.h b/include/linux/bcma/bcma_driver_mips.h index fb61f3fb4ddb..0b3b32aeeb8a 100644 --- a/include/linux/bcma/bcma_driver_mips.h +++ b/include/linux/bcma/bcma_driver_mips.h @@ -43,12 +43,12 @@ struct bcma_drv_mips { extern void bcma_core_mips_init(struct bcma_drv_mips *mcore); extern void bcma_core_mips_early_init(struct bcma_drv_mips *mcore); -extern unsigned int bcma_core_irq(struct bcma_device *core); +extern unsigned int bcma_core_mips_irq(struct bcma_device *dev); #else static inline void bcma_core_mips_init(struct bcma_drv_mips *mcore) { } static inline void bcma_core_mips_early_init(struct bcma_drv_mips *mcore) { } -static inline unsigned int bcma_core_irq(struct bcma_device *core) +static inline unsigned int bcma_core_mips_irq(struct bcma_device *dev) { return 0; } -- cgit v1.2.3 From 03f56e42d03eb7d0a47e40e9ae72a3ac0afeff08 Mon Sep 17 00:00:00 2001 From: Yijing Wang Date: Mon, 27 Oct 2014 10:44:37 +0800 Subject: Revert "PCI: Add x86_msi.msi_mask_irq() and msix_mask_irq()" The problem fixed by 0e4ccb1505a9 ("PCI: Add x86_msi.msi_mask_irq() and msix_mask_irq()") has been fixed in a simpler way by a previous commit ("PCI/MSI: Add pci_msi_ignore_mask to prevent writes to MSI/MSI-X Mask Bits"). The msi_mask_irq() and msix_mask_irq() x86_msi_ops added by 0e4ccb1505a9 are no longer needed, so revert the commit. default_msi_mask_irq() and default_msix_mask_irq() were added by 0e4ccb1505a9 and are still used by s390, so keep them for now. [bhelgaas: changelog] Signed-off-by: Yijing Wang Signed-off-by: Bjorn Helgaas Acked-by: David Vrabel CC: Konrad Rzeszutek Wilk CC: xen-devel@lists.xenproject.org --- include/linux/msi.h | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/msi.h b/include/linux/msi.h index 86dc501a1534..f6630a53be70 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -22,6 +22,8 @@ void __write_msi_msg(struct msi_desc *entry, struct msi_msg *msg); void read_msi_msg(unsigned int irq, struct msi_msg *msg); void get_cached_msi_msg(unsigned int irq, struct msi_msg *msg); void write_msi_msg(unsigned int irq, struct msi_msg *msg); +u32 __msix_mask_irq(struct msi_desc *desc, u32 flag); +u32 __msi_mask_irq(struct msi_desc *desc, u32 mask, u32 flag); struct msi_desc { struct { @@ -62,8 +64,8 @@ void arch_restore_msi_irqs(struct pci_dev *dev); void default_teardown_msi_irqs(struct pci_dev *dev); void default_restore_msi_irqs(struct pci_dev *dev); -u32 default_msi_mask_irq(struct msi_desc *desc, u32 mask, u32 flag); -u32 default_msix_mask_irq(struct msi_desc *desc, u32 flag); +#define default_msi_mask_irq __msi_mask_irq +#define default_msix_mask_irq __msix_mask_irq struct msi_chip { struct module *owner; -- cgit v1.2.3 From f8338694270224970cbaae7e404517ec39f9c753 Mon Sep 17 00:00:00 2001 From: Yijing Wang Date: Mon, 27 Oct 2014 10:44:38 +0800 Subject: s390/MSI: Use __msi_mask_irq() instead of default_msi_mask_irq() Now only s390/MSI use default_msi_mask_irq() and default_msix_mask_irq(), replace them with the common MSI mask IRQ functions __msi_mask_irq() and __msix_mask_irq(). Remove default_msi_mask_irq() and default_msix_mask_irq(). Signed-off-by: Yijing Wang Signed-off-by: Bjorn Helgaas Acked-by: Sebastian Ott CC: linux-s390@vger.kernel.org --- include/linux/msi.h | 2 -- 1 file changed, 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/msi.h b/include/linux/msi.h index f6630a53be70..efad12742e45 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -64,8 +64,6 @@ void arch_restore_msi_irqs(struct pci_dev *dev); void default_teardown_msi_irqs(struct pci_dev *dev); void default_restore_msi_irqs(struct pci_dev *dev); -#define default_msi_mask_irq __msi_mask_irq -#define default_msix_mask_irq __msix_mask_irq struct msi_chip { struct module *owner; -- cgit v1.2.3 From 702bf371282f5912fe53f0b247fa2d7df9d7951f Mon Sep 17 00:00:00 2001 From: Alexander Aring Date: Wed, 12 Nov 2014 03:36:57 +0100 Subject: ieee820154: add pan_id setting support This patch adds support for setting pan_id via nl802154 framework. Adding a comment because setting 0xffff as pan_id seems to be valid setting. The pan_id 0xffff as source pan is invalid. I am not sure now about this setting but for the current netlink interface this is an invalid setting, so we do the same now. Maybe we need to change that when we have coordinator support and association support. Signed-off-by: Alexander Aring Signed-off-by: Marcel Holtmann --- include/linux/ieee802154.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/linux') diff --git a/include/linux/ieee802154.h b/include/linux/ieee802154.h index d043449a079d..d40379876b84 100644 --- a/include/linux/ieee802154.h +++ b/include/linux/ieee802154.h @@ -30,6 +30,8 @@ #define IEEE802154_MTU 127 #define IEEE802154_MIN_PSDU_LEN 5 +#define IEEE802154_PAN_ID_BROADCAST 0xffff + #define IEEE802154_EXTENDED_ADDR_LEN 8 #define IEEE802154_FC_TYPE_BEACON 0x0 /* Frame is beacon */ -- cgit v1.2.3 From 9830c62a0b3d57d9d00880989cfe987f581bc03f Mon Sep 17 00:00:00 2001 From: Alexander Aring Date: Wed, 12 Nov 2014 03:36:58 +0100 Subject: ieee820154: add short_addr setting support This patch adds support for setting short address via nl802154 framework. Also added a comment because a 0xffff seems to be valid address that we don't have a short address. This is a valid setting but we need more checks in upper layers to don't allow this address as source address. Also the current netlink interface doesn't allow to set the short_addr to 0xffff. Same for the 0xfffe short address which describes a not allocated short address. Signed-off-by: Alexander Aring Signed-off-by: Marcel Holtmann --- include/linux/ieee802154.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/linux') diff --git a/include/linux/ieee802154.h b/include/linux/ieee802154.h index d40379876b84..ce0f96a55976 100644 --- a/include/linux/ieee802154.h +++ b/include/linux/ieee802154.h @@ -31,6 +31,8 @@ #define IEEE802154_MIN_PSDU_LEN 5 #define IEEE802154_PAN_ID_BROADCAST 0xffff +#define IEEE802154_ADDR_SHORT_BROADCAST 0xffff +#define IEEE802154_ADDR_SHORT_UNSPEC 0xfffe #define IEEE802154_EXTENDED_ADDR_LEN 8 -- cgit v1.2.3 From 71dfda58aaaf4bf6b1bc59f9d8afa635fa1337d4 Mon Sep 17 00:00:00 2001 From: Alexander Duyck Date: Tue, 11 Nov 2014 09:26:34 -0800 Subject: net: Add device Rx page allocation function This patch implements __dev_alloc_pages and __dev_alloc_page. These are meant to replace the __skb_alloc_pages and __skb_alloc_page functions. The reason for doing this is that it occurred to me that __skb_alloc_page is supposed to be passed an sk_buff pointer, but it is NULL in all cases where it is used. Worse is that in the case of ixgbe it is passed NULL via the sk_buff pointer in the rx_buffer info structure which means the compiler is not correctly stripping it out. The naming for these functions is based on dev_alloc_skb and __dev_alloc_skb. There was originally a netdev_alloc_page, however that was passed a net_device pointer and this function is not so I thought it best to follow that naming scheme since that is the same difference between dev_alloc_skb and netdev_alloc_skb. In the case of anything greater than order 0 it is assumed that we want a compound page so __GFP_COMP is set for all allocations as we expect a compound page when assigning a page frag. The other change in this patch is to exploit the behaviors of the page allocator in how it handles flags. So for example we can always set __GFP_COMP and __GFP_MEMALLOC since they are ignored if they are not applicable or are overridden by another flag. Signed-off-by: Alexander Duyck Signed-off-by: David S. Miller --- include/linux/skbuff.h | 48 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) (limited to 'include/linux') diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 103fbe8113f8..2e5221f1ec72 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -2184,6 +2184,54 @@ static inline struct sk_buff *netdev_alloc_skb_ip_align(struct net_device *dev, return __netdev_alloc_skb_ip_align(dev, length, GFP_ATOMIC); } +/** + * __dev_alloc_pages - allocate page for network Rx + * @gfp_mask: allocation priority. Set __GFP_NOMEMALLOC if not for network Rx + * @order: size of the allocation + * + * Allocate a new page. + * + * %NULL is returned if there is no free memory. +*/ +static inline struct page *__dev_alloc_pages(gfp_t gfp_mask, + unsigned int order) +{ + /* This piece of code contains several assumptions. + * 1. This is for device Rx, therefor a cold page is preferred. + * 2. The expectation is the user wants a compound page. + * 3. If requesting a order 0 page it will not be compound + * due to the check to see if order has a value in prep_new_page + * 4. __GFP_MEMALLOC is ignored if __GFP_NOMEMALLOC is set due to + * code in gfp_to_alloc_flags that should be enforcing this. + */ + gfp_mask |= __GFP_COLD | __GFP_COMP | __GFP_MEMALLOC; + + return alloc_pages_node(NUMA_NO_NODE, gfp_mask, order); +} + +static inline struct page *dev_alloc_pages(unsigned int order) +{ + return __dev_alloc_pages(GFP_ATOMIC, order); +} + +/** + * __dev_alloc_page - allocate a page for network Rx + * @gfp_mask: allocation priority. Set __GFP_NOMEMALLOC if not for network Rx + * + * Allocate a new page. + * + * %NULL is returned if there is no free memory. + */ +static inline struct page *__dev_alloc_page(gfp_t gfp_mask) +{ + return __dev_alloc_pages(gfp_mask, 0); +} + +static inline struct page *dev_alloc_page(void) +{ + return __dev_alloc_page(GFP_ATOMIC); +} + /** * __skb_alloc_pages - allocate pages for ps-rx on a skb and preserve pfmemalloc data * @gfp_mask: alloc_pages_node mask. Set __GFP_NOMEMALLOC if not for network packet RX -- cgit v1.2.3 From 160d2aba550b23c6a538158511d5adccc400f04c Mon Sep 17 00:00:00 2001 From: Alexander Duyck Date: Tue, 11 Nov 2014 09:27:05 -0800 Subject: net: Remove __skb_alloc_page and __skb_alloc_pages Remove the two functions which are now dead code. Signed-off-by: Alexander Duyck Signed-off-by: David S. Miller --- include/linux/skbuff.h | 43 ------------------------------------------- 1 file changed, 43 deletions(-) (limited to 'include/linux') diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 2e5221f1ec72..73c370e615de 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -2232,49 +2232,6 @@ static inline struct page *dev_alloc_page(void) return __dev_alloc_page(GFP_ATOMIC); } -/** - * __skb_alloc_pages - allocate pages for ps-rx on a skb and preserve pfmemalloc data - * @gfp_mask: alloc_pages_node mask. Set __GFP_NOMEMALLOC if not for network packet RX - * @skb: skb to set pfmemalloc on if __GFP_MEMALLOC is used - * @order: size of the allocation - * - * Allocate a new page. - * - * %NULL is returned if there is no free memory. -*/ -static inline struct page *__skb_alloc_pages(gfp_t gfp_mask, - struct sk_buff *skb, - unsigned int order) -{ - struct page *page; - - gfp_mask |= __GFP_COLD; - - if (!(gfp_mask & __GFP_NOMEMALLOC)) - gfp_mask |= __GFP_MEMALLOC; - - page = alloc_pages_node(NUMA_NO_NODE, gfp_mask, order); - if (skb && page && page->pfmemalloc) - skb->pfmemalloc = true; - - return page; -} - -/** - * __skb_alloc_page - allocate a page for ps-rx for a given skb and preserve pfmemalloc data - * @gfp_mask: alloc_pages_node mask. Set __GFP_NOMEMALLOC if not for network packet RX - * @skb: skb to set pfmemalloc on if __GFP_MEMALLOC is used - * - * Allocate a new page. - * - * %NULL is returned if there is no free memory. - */ -static inline struct page *__skb_alloc_page(gfp_t gfp_mask, - struct sk_buff *skb) -{ - return __skb_alloc_pages(gfp_mask, skb, 0); -} - /** * skb_propagate_pfmemalloc - Propagate pfmemalloc if skb is allocated after RX page * @page: The page that was allocated from skb_alloc_page -- cgit v1.2.3 From c2791b806988100cc1c047e2b0b5c5d0914aa3b6 Mon Sep 17 00:00:00 2001 From: Yijing Wang Date: Tue, 11 Nov 2014 17:45:45 -0700 Subject: PCI/MSI: Rename "struct msi_chip" to "struct msi_controller" "msi_chip" isn't very descriptive, so rename it to "msi_controller". That tells a little more about what it does and is already used in device tree bindings. No functional change. [bhelgaas: changelog, change *only* the struct name so it's reviewable] Suggested-by: Bjorn Helgaas Signed-off-by: Yijing Wang Signed-off-by: Bjorn Helgaas --- include/linux/msi.h | 6 +++--- include/linux/of_pci.h | 12 ++++++------ include/linux/pci.h | 2 +- 3 files changed, 10 insertions(+), 10 deletions(-) (limited to 'include/linux') diff --git a/include/linux/msi.h b/include/linux/msi.h index efad12742e45..6704991b0174 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -65,15 +65,15 @@ void arch_restore_msi_irqs(struct pci_dev *dev); void default_teardown_msi_irqs(struct pci_dev *dev); void default_restore_msi_irqs(struct pci_dev *dev); -struct msi_chip { +struct msi_controller { struct module *owner; struct device *dev; struct device_node *of_node; struct list_head list; - int (*setup_irq)(struct msi_chip *chip, struct pci_dev *dev, + int (*setup_irq)(struct msi_controller *chip, struct pci_dev *dev, struct msi_desc *desc); - void (*teardown_irq)(struct msi_chip *chip, unsigned int irq); + void (*teardown_irq)(struct msi_controller *chip, unsigned int irq); }; #endif /* LINUX_MSI_H */ diff --git a/include/linux/of_pci.h b/include/linux/of_pci.h index 1fd207e7a847..ce0e5abeb454 100644 --- a/include/linux/of_pci.h +++ b/include/linux/of_pci.h @@ -59,13 +59,13 @@ int of_pci_get_host_bridge_resources(struct device_node *dev, #endif #if defined(CONFIG_OF) && defined(CONFIG_PCI_MSI) -int of_pci_msi_chip_add(struct msi_chip *chip); -void of_pci_msi_chip_remove(struct msi_chip *chip); -struct msi_chip *of_pci_find_msi_chip_by_node(struct device_node *of_node); +int of_pci_msi_chip_add(struct msi_controller *chip); +void of_pci_msi_chip_remove(struct msi_controller *chip); +struct msi_controller *of_pci_find_msi_chip_by_node(struct device_node *of_node); #else -static inline int of_pci_msi_chip_add(struct msi_chip *chip) { return -EINVAL; } -static inline void of_pci_msi_chip_remove(struct msi_chip *chip) { } -static inline struct msi_chip * +static inline int of_pci_msi_chip_add(struct msi_controller *chip) { return -EINVAL; } +static inline void of_pci_msi_chip_remove(struct msi_controller *chip) { } +static inline struct msi_controller * of_pci_find_msi_chip_by_node(struct device_node *of_node) { return NULL; } #endif diff --git a/include/linux/pci.h b/include/linux/pci.h index 5be8db45e368..90a5fdec6b9f 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -449,7 +449,7 @@ struct pci_bus { struct resource busn_res; /* bus numbers routed to this bus */ struct pci_ops *ops; /* configuration access functions */ - struct msi_chip *msi; /* MSI controller */ + struct msi_controller *msi; /* MSI controller */ void *sysdata; /* hook for sys-specific extension */ struct proc_dir_entry *procdir; /* directory entry in /proc/bus/pci */ -- cgit v1.2.3 From d3cf6a4b01894e69e9e800ef76f34eaa13357ff1 Mon Sep 17 00:00:00 2001 From: Yoshihiro Shimoda Date: Mon, 10 Nov 2014 20:02:47 +0900 Subject: usb: renesas_usbhs: expand USB-DMAC channels for R-Car Gen2 This patch expands USB-DMAC channels for R-Car Gen2 SoCs. The SoCs have 4 channels. If d{2,3}_{t,x}x_id are not set, this driver never uses the expanded USB-DMAC channels. Signed-off-by: Yoshihiro Shimoda Signed-off-by: Felipe Balbi --- include/linux/usb/renesas_usbhs.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include/linux') diff --git a/include/linux/usb/renesas_usbhs.h b/include/linux/usb/renesas_usbhs.h index d5952bb66752..9fd9e481ea98 100644 --- a/include/linux/usb/renesas_usbhs.h +++ b/include/linux/usb/renesas_usbhs.h @@ -145,6 +145,10 @@ struct renesas_usbhs_driver_param { int d0_rx_id; int d1_tx_id; int d1_rx_id; + int d2_tx_id; + int d2_rx_id; + int d3_tx_id; + int d3_rx_id; /* * option: -- cgit v1.2.3 From c31accd159a6477b91de61ae237dce38e3f3ee4d Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Tue, 11 Nov 2014 19:45:57 +0100 Subject: net: phy: add module_phy_driver macro Add helper macro for PHY drivers which do not do anything special in module init/exit. This will allow us to eliminate a lot of boilerplate code. Signed-off-by: Johan Hovold Signed-off-by: David S. Miller --- include/linux/phy.h | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) (limited to 'include/linux') diff --git a/include/linux/phy.h b/include/linux/phy.h index d090cfcaa167..07794e720139 100644 --- a/include/linux/phy.h +++ b/include/linux/phy.h @@ -772,4 +772,28 @@ int __init mdio_bus_init(void); void mdio_bus_exit(void); extern struct bus_type mdio_bus_type; + +/** + * module_phy_driver() - Helper macro for registering PHY drivers + * @__phy_drivers: array of PHY drivers to register + * + * Helper macro for PHY drivers which do not do anything special in module + * init/exit. Each module may only use this macro once, and calling it + * replaces module_init() and module_exit(). + */ +#define phy_module_driver(__phy_drivers, __count) \ +static int __init phy_module_init(void) \ +{ \ + return phy_drivers_register(__phy_drivers, __count); \ +} \ +module_init(phy_module_init); \ +static void __exit phy_module_exit(void) \ +{ \ + phy_drivers_unregister(__phy_drivers, __count); \ +} \ +module_exit(phy_module_exit) + +#define module_phy_driver(__phy_drivers) \ + phy_module_driver(__phy_drivers, ARRAY_SIZE(__phy_drivers)) + #endif /* __PHY_H */ -- cgit v1.2.3 From b82b6cca488074da3852e8a54fde1d9f74bf1557 Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Wed, 12 Nov 2014 16:03:50 +0100 Subject: cpuidle: Invert CPUIDLE_FLAG_TIME_VALID logic The only place where the time is invalid is when the ACPI_CSTATE_FFH entry method is not set. Otherwise for all the drivers, the time can be correctly measured. Instead of duplicating the CPUIDLE_FLAG_TIME_VALID flag in all the drivers for all the states, just invert the logic by replacing it by the flag CPUIDLE_FLAG_TIME_INVALID, hence we can set this flag only for the acpi idle driver, remove the former flag from all the drivers and invert the logic with this flag in the different governor. Signed-off-by: Daniel Lezcano Signed-off-by: Rafael J. Wysocki --- include/linux/cpuidle.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/cpuidle.h b/include/linux/cpuidle.h index 25e0df6155a4..a07e087f54b2 100644 --- a/include/linux/cpuidle.h +++ b/include/linux/cpuidle.h @@ -53,7 +53,7 @@ struct cpuidle_state { }; /* Idle State Flags */ -#define CPUIDLE_FLAG_TIME_VALID (0x01) /* is residency time measurable? */ +#define CPUIDLE_FLAG_TIME_INVALID (0x01) /* is residency time measurable? */ #define CPUIDLE_FLAG_COUPLED (0x02) /* state applies to multiple cpus */ #define CPUIDLE_FLAG_TIMER_STOP (0x04) /* timer is stopped on this state */ @@ -90,7 +90,7 @@ DECLARE_PER_CPU(struct cpuidle_device, cpuidle_dev); * cpuidle_get_last_residency - retrieves the last state's residency time * @dev: the target CPU * - * NOTE: this value is invalid if CPUIDLE_FLAG_TIME_VALID isn't set + * NOTE: this value is invalid if CPUIDLE_FLAG_TIME_INVALID is set */ static inline int cpuidle_get_last_residency(struct cpuidle_device *dev) { -- cgit v1.2.3 From 61f2dcba9a03d4fd9342f0d6821af0a46c7098e9 Mon Sep 17 00:00:00 2001 From: Alexander Aring Date: Wed, 12 Nov 2014 19:51:56 +0100 Subject: mac802154: add interframe spacing time handling This patch adds a new interframe spacing time handling into mac802154 layer. Interframe spacing time is a time period between each transmit. This patch adds a high resolution timer into mac802154 and starts on xmit complete with corresponding interframe spacing expire time if ifs_handling is true. We make it variable because it depends if interframe spacing time is handled by transceiver or mac802154. At the timer complete function we wake the netdev queue again. This avoids new frame transmit in range of interframe spacing time. For synced driver we add no handling of interframe spacing time. This is currently a lack of support in all synced xmit drivers. I suppose it's working because the latency of workqueue which is needed to call spi_sync. Signed-off-by: Alexander Aring Signed-off-by: Marcel Holtmann --- include/linux/ieee802154.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/linux') diff --git a/include/linux/ieee802154.h b/include/linux/ieee802154.h index ce0f96a55976..5a40c0418438 100644 --- a/include/linux/ieee802154.h +++ b/include/linux/ieee802154.h @@ -36,6 +36,9 @@ #define IEEE802154_EXTENDED_ADDR_LEN 8 +#define IEEE802154_LIFS_PERIOD 40 +#define IEEE802154_SIFS_PERIOD 12 + #define IEEE802154_FC_TYPE_BEACON 0x0 /* Frame is beacon */ #define IEEE802154_FC_TYPE_DATA 0x1 /* Frame is data */ #define IEEE802154_FC_TYPE_ACK 0x2 /* Frame is acknowledgment */ -- cgit v1.2.3 From 37d74578d819b1798dd2cff724438e345d118980 Mon Sep 17 00:00:00 2001 From: Thierry Reding Date: Wed, 8 Oct 2014 11:14:34 +0200 Subject: video/hdmi: Relicense header under MIT license MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit OpenBSD wants to reuse this file but needs the license to be more permissive. Acked-by: Alban Bedel Acked-by: Daniel Vetter Acked-by: Alex Deucher Acked-by: Christian König Signed-off-by: Thierry Reding --- include/linux/hdmi.h | 21 ++++++++++++++++++--- 1 file changed, 18 insertions(+), 3 deletions(-) (limited to 'include/linux') diff --git a/include/linux/hdmi.h b/include/linux/hdmi.h index 11c0182a153b..cbb5790a35cd 100644 --- a/include/linux/hdmi.h +++ b/include/linux/hdmi.h @@ -1,9 +1,24 @@ /* * Copyright (C) 2012 Avionic Design GmbH * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sub license, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. */ #ifndef __LINUX_HDMI_H_ -- cgit v1.2.3 From 0d7f488f0305a9caffab0a18a882f9980f8bc936 Mon Sep 17 00:00:00 2001 From: Stephan Mueller Date: Wed, 12 Nov 2014 05:27:49 +0100 Subject: crypto: doc - cipher data structures The data structure of struct crypto_alg together with various other data structures needed by cipher developers is documented wit all parameters that can be set by a developer of a transformation. All parameters that are internal to the crypto API are marked as such. Signed-off-by: Stephan Mueller Signed-off-by: Herbert Xu --- include/linux/crypto.h | 246 ++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 243 insertions(+), 3 deletions(-) (limited to 'include/linux') diff --git a/include/linux/crypto.h b/include/linux/crypto.h index d45e949699ea..752360e1e8fe 100644 --- a/include/linux/crypto.h +++ b/include/linux/crypto.h @@ -127,6 +127,13 @@ struct skcipher_givcrypt_request; typedef void (*crypto_completion_t)(struct crypto_async_request *req, int err); +/** + * DOC: Block Cipher Context Data Structures + * + * These data structures define the operating context for each block cipher + * type. + */ + struct crypto_async_request { struct list_head list; crypto_completion_t complete; @@ -194,9 +201,63 @@ struct hash_desc { u32 flags; }; -/* - * Algorithms: modular crypto algorithm implementations, managed - * via crypto_register_alg() and crypto_unregister_alg(). +/** + * DOC: Block Cipher Algorithm Definitions + * + * These data structures define modular crypto algorithm implementations, + * managed via crypto_register_alg() and crypto_unregister_alg(). + */ + +/** + * struct ablkcipher_alg - asynchronous block cipher definition + * @min_keysize: Minimum key size supported by the transformation. This is the + * smallest key length supported by this transformation algorithm. + * This must be set to one of the pre-defined values as this is + * not hardware specific. Possible values for this field can be + * found via git grep "_MIN_KEY_SIZE" include/crypto/ + * @max_keysize: Maximum key size supported by the transformation. This is the + * largest key length supported by this transformation algorithm. + * This must be set to one of the pre-defined values as this is + * not hardware specific. Possible values for this field can be + * found via git grep "_MAX_KEY_SIZE" include/crypto/ + * @setkey: Set key for the transformation. This function is used to either + * program a supplied key into the hardware or store the key in the + * transformation context for programming it later. Note that this + * function does modify the transformation context. This function can + * be called multiple times during the existence of the transformation + * object, so one must make sure the key is properly reprogrammed into + * the hardware. This function is also responsible for checking the key + * length for validity. In case a software fallback was put in place in + * the @cra_init call, this function might need to use the fallback if + * the algorithm doesn't support all of the key sizes. + * @encrypt: Encrypt a scatterlist of blocks. This function is used to encrypt + * the supplied scatterlist containing the blocks of data. The crypto + * API consumer is responsible for aligning the entries of the + * scatterlist properly and making sure the chunks are correctly + * sized. In case a software fallback was put in place in the + * @cra_init call, this function might need to use the fallback if + * the algorithm doesn't support all of the key sizes. In case the + * key was stored in transformation context, the key might need to be + * re-programmed into the hardware in this function. This function + * shall not modify the transformation context, as this function may + * be called in parallel with the same transformation object. + * @decrypt: Decrypt a single block. This is a reverse counterpart to @encrypt + * and the conditions are exactly the same. + * @givencrypt: Update the IV for encryption. With this function, a cipher + * implementation may provide the function on how to update the IV + * for encryption. + * @givdecrypt: Update the IV for decryption. This is the reverse of + * @givencrypt . + * @geniv: The transformation implementation may use an "IV generator" provided + * by the kernel crypto API. Several use cases have a predefined + * approach how IVs are to be updated. For such use cases, the kernel + * crypto API provides ready-to-use implementations that can be + * referenced with this variable. + * @ivsize: IV size applicable for transformation. The consumer must provide an + * IV of exactly that size to perform the encrypt or decrypt operation. + * + * All fields except @givencrypt , @givdecrypt , @geniv and @ivsize are + * mandatory and must be filled. */ struct ablkcipher_alg { int (*setkey)(struct crypto_ablkcipher *tfm, const u8 *key, @@ -213,6 +274,32 @@ struct ablkcipher_alg { unsigned int ivsize; }; +/** + * struct aead_alg - AEAD cipher definition + * @maxauthsize: Set the maximum authentication tag size supported by the + * transformation. A transformation may support smaller tag sizes. + * As the authentication tag is a message digest to ensure the + * integrity of the encrypted data, a consumer typically wants the + * largest authentication tag possible as defined by this + * variable. + * @setauthsize: Set authentication size for the AEAD transformation. This + * function is used to specify the consumer requested size of the + * authentication tag to be either generated by the transformation + * during encryption or the size of the authentication tag to be + * supplied during the decryption operation. This function is also + * responsible for checking the authentication tag size for + * validity. + * @setkey: see struct ablkcipher_alg + * @encrypt: see struct ablkcipher_alg + * @decrypt: see struct ablkcipher_alg + * @givencrypt: see struct ablkcipher_alg + * @givdecrypt: see struct ablkcipher_alg + * @geniv: see struct ablkcipher_alg + * @ivsize: see struct ablkcipher_alg + * + * All fields except @givencrypt , @givdecrypt , @geniv and @ivsize are + * mandatory and must be filled. + */ struct aead_alg { int (*setkey)(struct crypto_aead *tfm, const u8 *key, unsigned int keylen); @@ -228,6 +315,18 @@ struct aead_alg { unsigned int maxauthsize; }; +/** + * struct blkcipher_alg - synchronous block cipher definition + * @min_keysize: see struct ablkcipher_alg + * @max_keysize: see struct ablkcipher_alg + * @setkey: see struct ablkcipher_alg + * @encrypt: see struct ablkcipher_alg + * @decrypt: see struct ablkcipher_alg + * @geniv: see struct ablkcipher_alg + * @ivsize: see struct ablkcipher_alg + * + * All fields except @geniv and @ivsize are mandatory and must be filled. + */ struct blkcipher_alg { int (*setkey)(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen); @@ -245,6 +344,53 @@ struct blkcipher_alg { unsigned int ivsize; }; +/** + * struct cipher_alg - single-block symmetric ciphers definition + * @cia_min_keysize: Minimum key size supported by the transformation. This is + * the smallest key length supported by this transformation + * algorithm. This must be set to one of the pre-defined + * values as this is not hardware specific. Possible values + * for this field can be found via git grep "_MIN_KEY_SIZE" + * include/crypto/ + * @cia_max_keysize: Maximum key size supported by the transformation. This is + * the largest key length supported by this transformation + * algorithm. This must be set to one of the pre-defined values + * as this is not hardware specific. Possible values for this + * field can be found via git grep "_MAX_KEY_SIZE" + * include/crypto/ + * @cia_setkey: Set key for the transformation. This function is used to either + * program a supplied key into the hardware or store the key in the + * transformation context for programming it later. Note that this + * function does modify the transformation context. This function + * can be called multiple times during the existence of the + * transformation object, so one must make sure the key is properly + * reprogrammed into the hardware. This function is also + * responsible for checking the key length for validity. + * @cia_encrypt: Encrypt a single block. This function is used to encrypt a + * single block of data, which must be @cra_blocksize big. This + * always operates on a full @cra_blocksize and it is not possible + * to encrypt a block of smaller size. The supplied buffers must + * therefore also be at least of @cra_blocksize size. Both the + * input and output buffers are always aligned to @cra_alignmask. + * In case either of the input or output buffer supplied by user + * of the crypto API is not aligned to @cra_alignmask, the crypto + * API will re-align the buffers. The re-alignment means that a + * new buffer will be allocated, the data will be copied into the + * new buffer, then the processing will happen on the new buffer, + * then the data will be copied back into the original buffer and + * finally the new buffer will be freed. In case a software + * fallback was put in place in the @cra_init call, this function + * might need to use the fallback if the algorithm doesn't support + * all of the key sizes. In case the key was stored in + * transformation context, the key might need to be re-programmed + * into the hardware in this function. This function shall not + * modify the transformation context, as this function may be + * called in parallel with the same transformation object. + * @cia_decrypt: Decrypt a single block. This is a reverse counterpart to + * @cia_encrypt, and the conditions are exactly the same. + * + * All fields are mandatory and must be filled. + */ struct cipher_alg { unsigned int cia_min_keysize; unsigned int cia_max_keysize; @@ -261,6 +407,25 @@ struct compress_alg { unsigned int slen, u8 *dst, unsigned int *dlen); }; +/** + * struct rng_alg - random number generator definition + * @rng_make_random: The function defined by this variable obtains a random + * number. The random number generator transform must generate + * the random number out of the context provided with this + * call. + * @rng_reset: Reset of the random number generator by clearing the entire state. + * With the invocation of this function call, the random number + * generator shall completely reinitialize its state. If the random + * number generator requires a seed for setting up a new state, + * the seed must be provided by the consumer while invoking this + * function. The required size of the seed is defined with + * @seedsize . + * @seedsize: The seed size required for a random number generator + * initialization defined with this variable. Some random number + * generators like the SP800-90A DRBG does not require a seed as the + * seeding is implemented internally without the need of support by + * the consumer. In this case, the seed size is set to zero. + */ struct rng_alg { int (*rng_make_random)(struct crypto_rng *tfm, u8 *rdata, unsigned int dlen); @@ -277,6 +442,81 @@ struct rng_alg { #define cra_compress cra_u.compress #define cra_rng cra_u.rng +/** + * struct crypto_alg - definition of a cryptograpic cipher algorithm + * @cra_flags: Flags describing this transformation. See include/linux/crypto.h + * CRYPTO_ALG_* flags for the flags which go in here. Those are + * used for fine-tuning the description of the transformation + * algorithm. + * @cra_blocksize: Minimum block size of this transformation. The size in bytes + * of the smallest possible unit which can be transformed with + * this algorithm. The users must respect this value. + * In case of HASH transformation, it is possible for a smaller + * block than @cra_blocksize to be passed to the crypto API for + * transformation, in case of any other transformation type, an + * error will be returned upon any attempt to transform smaller + * than @cra_blocksize chunks. + * @cra_ctxsize: Size of the operational context of the transformation. This + * value informs the kernel crypto API about the memory size + * needed to be allocated for the transformation context. + * @cra_alignmask: Alignment mask for the input and output data buffer. The data + * buffer containing the input data for the algorithm must be + * aligned to this alignment mask. The data buffer for the + * output data must be aligned to this alignment mask. Note that + * the Crypto API will do the re-alignment in software, but + * only under special conditions and there is a performance hit. + * The re-alignment happens at these occasions for different + * @cra_u types: cipher -- For both input data and output data + * buffer; ahash -- For output hash destination buf; shash -- + * For output hash destination buf. + * This is needed on hardware which is flawed by design and + * cannot pick data from arbitrary addresses. + * @cra_priority: Priority of this transformation implementation. In case + * multiple transformations with same @cra_name are available to + * the Crypto API, the kernel will use the one with highest + * @cra_priority. + * @cra_name: Generic name (usable by multiple implementations) of the + * transformation algorithm. This is the name of the transformation + * itself. This field is used by the kernel when looking up the + * providers of particular transformation. + * @cra_driver_name: Unique name of the transformation provider. This is the + * name of the provider of the transformation. This can be any + * arbitrary value, but in the usual case, this contains the + * name of the chip or provider and the name of the + * transformation algorithm. + * @cra_type: Type of the cryptographic transformation. This is a pointer to + * struct crypto_type, which implements callbacks common for all + * trasnformation types. There are multiple options: + * &crypto_blkcipher_type, &crypto_ablkcipher_type, + * &crypto_ahash_type, &crypto_aead_type, &crypto_rng_type. + * This field might be empty. In that case, there are no common + * callbacks. This is the case for: cipher, compress, shash. + * @cra_u: Callbacks implementing the transformation. This is a union of + * multiple structures. Depending on the type of transformation selected + * by @cra_type and @cra_flags above, the associated structure must be + * filled with callbacks. This field might be empty. This is the case + * for ahash, shash. + * @cra_init: Initialize the cryptographic transformation object. This function + * is used to initialize the cryptographic transformation object. + * This function is called only once at the instantiation time, right + * after the transformation context was allocated. In case the + * cryptographic hardware has some special requirements which need to + * be handled by software, this function shall check for the precise + * requirement of the transformation and put any software fallbacks + * in place. + * @cra_exit: Deinitialize the cryptographic transformation object. This is a + * counterpart to @cra_init, used to remove various changes set in + * @cra_init. + * @cra_module: Owner of this transformation implementation. Set to THIS_MODULE + * @cra_list: internally used + * @cra_users: internally used + * @cra_refcnt: internally used + * @cra_destroy: internally used + * + * The struct crypto_alg describes a generic Crypto API algorithm and is common + * for all of the transformations. Any variable not documented here shall not + * be used by a cipher implementation as it is internal to the Crypto API. + */ struct crypto_alg { struct list_head cra_list; struct list_head cra_users; -- cgit v1.2.3 From f13ec330a787c2653d4738be1ee887ead1fb3008 Mon Sep 17 00:00:00 2001 From: Stephan Mueller Date: Wed, 12 Nov 2014 05:28:22 +0100 Subject: crypto: doc - ABLKCIPHER API documentation The API function calls exported by the kernel crypto API for asynchronous block ciphers to be used by consumers are documented. Signed-off-by: Stephan Mueller Signed-off-by: Herbert Xu --- include/linux/crypto.h | 206 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 206 insertions(+) (limited to 'include/linux') diff --git a/include/linux/crypto.h b/include/linux/crypto.h index 752360e1e8fe..39c8fc6d3313 100644 --- a/include/linux/crypto.h +++ b/include/linux/crypto.h @@ -821,6 +821,50 @@ static inline u32 crypto_skcipher_mask(u32 mask) return mask; } +/** + * DOC: Asynchronous Block Cipher API + * + * Asynchronous block cipher API is used with the ciphers of type + * CRYPTO_ALG_TYPE_ABLKCIPHER (listed as type "ablkcipher" in /proc/crypto). + * + * Asynchronous cipher operations imply that the function invocation for a + * cipher request returns immediately before the completion of the operation. + * The cipher request is scheduled as a separate kernel thread and therefore + * load-balanced on the different CPUs via the process scheduler. To allow + * the kernel crypto API to inform the caller about the completion of a cipher + * request, the caller must provide a callback function. That function is + * invoked with the cipher handle when the request completes. + * + * To support the asynchronous operation, additional information than just the + * cipher handle must be supplied to the kernel crypto API. That additional + * information is given by filling in the ablkcipher_request data structure. + * + * For the asynchronous block cipher API, the state is maintained with the tfm + * cipher handle. A single tfm can be used across multiple calls and in + * parallel. For asynchronous block cipher calls, context data supplied and + * only used by the caller can be referenced the request data structure in + * addition to the IV used for the cipher request. The maintenance of such + * state information would be important for a crypto driver implementer to + * have, because when calling the callback function upon completion of the + * cipher operation, that callback function may need some information about + * which operation just finished if it invoked multiple in parallel. This + * state information is unused by the kernel crypto API. + */ + +/** + * crypto_alloc_ablkcipher() - allocate asynchronous block cipher handle + * @alg_name: is the cra_name / name or cra_driver_name / driver name of the + * ablkcipher cipher + * @type: specifies the type of the cipher + * @mask: specifies the mask for the cipher + * + * Allocate a cipher handle for an ablkcipher. The returned struct + * crypto_ablkcipher is the cipher handle that is required for any subsequent + * API invocation for that ablkcipher. + * + * Return: allocated cipher handle in case of success; IS_ERR() is true in case + * of an error, PTR_ERR() returns the error code. + */ struct crypto_ablkcipher *crypto_alloc_ablkcipher(const char *alg_name, u32 type, u32 mask); @@ -830,11 +874,25 @@ static inline struct crypto_tfm *crypto_ablkcipher_tfm( return &tfm->base; } +/** + * crypto_free_ablkcipher() - zeroize and free cipher handle + * @tfm: cipher handle to be freed + */ static inline void crypto_free_ablkcipher(struct crypto_ablkcipher *tfm) { crypto_free_tfm(crypto_ablkcipher_tfm(tfm)); } +/** + * crypto_has_ablkcipher() - Search for the availability of an ablkcipher. + * @alg_name: is the cra_name / name or cra_driver_name / driver name of the + * ablkcipher + * @type: specifies the type of the cipher + * @mask: specifies the mask for the cipher + * + * Return: true when the ablkcipher is known to the kernel crypto API; false + * otherwise + */ static inline int crypto_has_ablkcipher(const char *alg_name, u32 type, u32 mask) { @@ -848,12 +906,31 @@ static inline struct ablkcipher_tfm *crypto_ablkcipher_crt( return &crypto_ablkcipher_tfm(tfm)->crt_ablkcipher; } +/** + * crypto_ablkcipher_ivsize() - obtain IV size + * @tfm: cipher handle + * + * The size of the IV for the ablkcipher referenced by the cipher handle is + * returned. This IV size may be zero if the cipher does not need an IV. + * + * Return: IV size in bytes + */ static inline unsigned int crypto_ablkcipher_ivsize( struct crypto_ablkcipher *tfm) { return crypto_ablkcipher_crt(tfm)->ivsize; } +/** + * crypto_ablkcipher_blocksize() - obtain block size of cipher + * @tfm: cipher handle + * + * The block size for the ablkcipher referenced with the cipher handle is + * returned. The caller may use that information to allocate appropriate + * memory for the data returned by the encryption or decryption operation + * + * Return: block size of cipher + */ static inline unsigned int crypto_ablkcipher_blocksize( struct crypto_ablkcipher *tfm) { @@ -883,6 +960,22 @@ static inline void crypto_ablkcipher_clear_flags(struct crypto_ablkcipher *tfm, crypto_tfm_clear_flags(crypto_ablkcipher_tfm(tfm), flags); } +/** + * crypto_ablkcipher_setkey() - set key for cipher + * @tfm: cipher handle + * @key: buffer holding the key + * @keylen: length of the key in bytes + * + * The caller provided key is set for the ablkcipher referenced by the cipher + * handle. + * + * Note, the key length determines the cipher type. Many block ciphers implement + * different cipher modes depending on the key size, such as AES-128 vs AES-192 + * vs. AES-256. When providing a 16 byte key for an AES cipher handle, AES-128 + * is performed. + * + * Return: 0 if the setting of the key was successful; < 0 if an error occurred + */ static inline int crypto_ablkcipher_setkey(struct crypto_ablkcipher *tfm, const u8 *key, unsigned int keylen) { @@ -891,12 +984,32 @@ static inline int crypto_ablkcipher_setkey(struct crypto_ablkcipher *tfm, return crt->setkey(crt->base, key, keylen); } +/** + * crypto_ablkcipher_reqtfm() - obtain cipher handle from request + * @req: ablkcipher_request out of which the cipher handle is to be obtained + * + * Return the crypto_ablkcipher handle when furnishing an ablkcipher_request + * data structure. + * + * Return: crypto_ablkcipher handle + */ static inline struct crypto_ablkcipher *crypto_ablkcipher_reqtfm( struct ablkcipher_request *req) { return __crypto_ablkcipher_cast(req->base.tfm); } +/** + * crypto_ablkcipher_encrypt() - encrypt plaintext + * @req: reference to the ablkcipher_request handle that holds all information + * needed to perform the cipher operation + * + * Encrypt plaintext data using the ablkcipher_request handle. That data + * structure and how it is filled with data is discussed with the + * ablkcipher_request_* functions. + * + * Return: 0 if the cipher operation was successful; < 0 if an error occurred + */ static inline int crypto_ablkcipher_encrypt(struct ablkcipher_request *req) { struct ablkcipher_tfm *crt = @@ -904,6 +1017,17 @@ static inline int crypto_ablkcipher_encrypt(struct ablkcipher_request *req) return crt->encrypt(req); } +/** + * crypto_ablkcipher_decrypt() - decrypt ciphertext + * @req: reference to the ablkcipher_request handle that holds all information + * needed to perform the cipher operation + * + * Decrypt ciphertext data using the ablkcipher_request handle. That data + * structure and how it is filled with data is discussed with the + * ablkcipher_request_* functions. + * + * Return: 0 if the cipher operation was successful; < 0 if an error occurred + */ static inline int crypto_ablkcipher_decrypt(struct ablkcipher_request *req) { struct ablkcipher_tfm *crt = @@ -911,12 +1035,37 @@ static inline int crypto_ablkcipher_decrypt(struct ablkcipher_request *req) return crt->decrypt(req); } +/** + * DOC: Asynchronous Cipher Request Handle + * + * The ablkcipher_request data structure contains all pointers to data + * required for the asynchronous cipher operation. This includes the cipher + * handle (which can be used by multiple ablkcipher_request instances), pointer + * to plaintext and ciphertext, asynchronous callback function, etc. It acts + * as a handle to the ablkcipher_request_* API calls in a similar way as + * ablkcipher handle to the crypto_ablkcipher_* API calls. + */ + +/** + * crypto_ablkcipher_reqsize() - obtain size of the request data structure + * @tfm: cipher handle + * + * Return: number of bytes + */ static inline unsigned int crypto_ablkcipher_reqsize( struct crypto_ablkcipher *tfm) { return crypto_ablkcipher_crt(tfm)->reqsize; } +/** + * ablkcipher_request_set_tfm() - update cipher handle reference in request + * @req: request handle to be modified + * @tfm: cipher handle that shall be added to the request handle + * + * Allow the caller to replace the existing ablkcipher handle in the request + * data structure with a different one. + */ static inline void ablkcipher_request_set_tfm( struct ablkcipher_request *req, struct crypto_ablkcipher *tfm) { @@ -929,6 +1078,18 @@ static inline struct ablkcipher_request *ablkcipher_request_cast( return container_of(req, struct ablkcipher_request, base); } +/** + * ablkcipher_request_alloc() - allocate request data structure + * @tfm: cipher handle to be registered with the request + * @gfp: memory allocation flag that is handed to kmalloc by the API call. + * + * Allocate the request data structure that must be used with the ablkcipher + * encrypt and decrypt API calls. During the allocation, the provided ablkcipher + * handle is registered in the request data structure. + * + * Return: allocated request handle in case of success; IS_ERR() is true in case + * of an error, PTR_ERR() returns the error code. + */ static inline struct ablkcipher_request *ablkcipher_request_alloc( struct crypto_ablkcipher *tfm, gfp_t gfp) { @@ -943,11 +1104,40 @@ static inline struct ablkcipher_request *ablkcipher_request_alloc( return req; } +/** + * ablkcipher_request_free() - zeroize and free request data structure + * @req: request data structure cipher handle to be freed + */ static inline void ablkcipher_request_free(struct ablkcipher_request *req) { kzfree(req); } +/** + * ablkcipher_request_set_callback() - set asynchronous callback function + * @req: request handle + * @flags: specify zero or an ORing of the flags + * CRYPTO_TFM_REQ_MAY_BACKLOG the request queue may back log and + * increase the wait queue beyond the initial maximum size; + * CRYPTO_TFM_REQ_MAY_SLEEP the request processing may sleep + * @compl: callback function pointer to be registered with the request handle + * @data: The data pointer refers to memory that is not used by the kernel + * crypto API, but provided to the callback function for it to use. Here, + * the caller can provide a reference to memory the callback function can + * operate on. As the callback function is invoked asynchronously to the + * related functionality, it may need to access data structures of the + * related functionality which can be referenced using this pointer. The + * callback function can access the memory via the "data" field in the + * crypto_async_request data structure provided to the callback function. + * + * This function allows setting the callback function that is triggered once the + * cipher operation completes. + * + * The callback function is registered with the ablkcipher_request handle and + * must comply with the following template: + * + * void callback_function(struct crypto_async_request *req, int error) + */ static inline void ablkcipher_request_set_callback( struct ablkcipher_request *req, u32 flags, crypto_completion_t compl, void *data) @@ -957,6 +1147,22 @@ static inline void ablkcipher_request_set_callback( req->base.flags = flags; } +/** + * ablkcipher_request_set_crypt() - set data buffers + * @req: request handle + * @src: source scatter / gather list + * @dst: destination scatter / gather list + * @nbytes: number of bytes to process from @src + * @iv: IV for the cipher operation which must comply with the IV size defined + * by crypto_ablkcipher_ivsize + * + * This function allows setting of the source data and destination data + * scatter / gather lists. + * + * For encryption, the source is treated as the plaintext and the + * destination is the ciphertext. For a decryption operation, the use is + * reversed: the source is the ciphertext and the destination is the plaintext. + */ static inline void ablkcipher_request_set_crypt( struct ablkcipher_request *req, struct scatterlist *src, struct scatterlist *dst, -- cgit v1.2.3 From fced7b02623e3ccace714f8adceed735698a9c8b Mon Sep 17 00:00:00 2001 From: Stephan Mueller Date: Wed, 12 Nov 2014 05:29:00 +0100 Subject: crypto: doc - AEAD API documentation The API function calls exported by the kernel crypto API for AEAD ciphers to be used by consumers are documented. Signed-off-by: Stephan Mueller Signed-off-by: Herbert Xu --- include/linux/crypto.h | 251 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 251 insertions(+) (limited to 'include/linux') diff --git a/include/linux/crypto.h b/include/linux/crypto.h index 39c8fc6d3313..4704e71a31fe 100644 --- a/include/linux/crypto.h +++ b/include/linux/crypto.h @@ -1174,11 +1174,55 @@ static inline void ablkcipher_request_set_crypt( req->info = iv; } +/** + * DOC: Authenticated Encryption With Associated Data (AEAD) Cipher API + * + * The AEAD cipher API is used with the ciphers of type CRYPTO_ALG_TYPE_AEAD + * (listed as type "aead" in /proc/crypto) + * + * The most prominent examples for this type of encryption is GCM and CCM. + * However, the kernel supports other types of AEAD ciphers which are defined + * with the following cipher string: + * + * authenc(keyed message digest, block cipher) + * + * For example: authenc(hmac(sha256), cbc(aes)) + * + * The example code provided for the asynchronous block cipher operation + * applies here as well. Naturally all *ablkcipher* symbols must be exchanged + * the *aead* pendants discussed in the following. In addtion, for the AEAD + * operation, the aead_request_set_assoc function must be used to set the + * pointer to the associated data memory location before performing the + * encryption or decryption operation. In case of an encryption, the associated + * data memory is filled during the encryption operation. For decryption, the + * associated data memory must contain data that is used to verify the integrity + * of the decrypted data. Another deviation from the asynchronous block cipher + * operation is that the caller should explicitly check for -EBADMSG of the + * crypto_aead_decrypt. That error indicates an authentication error, i.e. + * a breach in the integrity of the message. In essence, that -EBADMSG error + * code is the key bonus an AEAD cipher has over "standard" block chaining + * modes. + */ + static inline struct crypto_aead *__crypto_aead_cast(struct crypto_tfm *tfm) { return (struct crypto_aead *)tfm; } +/** + * crypto_alloc_aead() - allocate AEAD cipher handle + * @alg_name: is the cra_name / name or cra_driver_name / driver name of the + * AEAD cipher + * @type: specifies the type of the cipher + * @mask: specifies the mask for the cipher + * + * Allocate a cipher handle for an AEAD. The returned struct + * crypto_aead is the cipher handle that is required for any subsequent + * API invocation for that AEAD. + * + * Return: allocated cipher handle in case of success; IS_ERR() is true in case + * of an error, PTR_ERR() returns the error code. + */ struct crypto_aead *crypto_alloc_aead(const char *alg_name, u32 type, u32 mask); static inline struct crypto_tfm *crypto_aead_tfm(struct crypto_aead *tfm) @@ -1186,6 +1230,10 @@ static inline struct crypto_tfm *crypto_aead_tfm(struct crypto_aead *tfm) return &tfm->base; } +/** + * crypto_free_aead() - zeroize and free aead handle + * @tfm: cipher handle to be freed + */ static inline void crypto_free_aead(struct crypto_aead *tfm) { crypto_free_tfm(crypto_aead_tfm(tfm)); @@ -1196,16 +1244,47 @@ static inline struct aead_tfm *crypto_aead_crt(struct crypto_aead *tfm) return &crypto_aead_tfm(tfm)->crt_aead; } +/** + * crypto_aead_ivsize() - obtain IV size + * @tfm: cipher handle + * + * The size of the IV for the aead referenced by the cipher handle is + * returned. This IV size may be zero if the cipher does not need an IV. + * + * Return: IV size in bytes + */ static inline unsigned int crypto_aead_ivsize(struct crypto_aead *tfm) { return crypto_aead_crt(tfm)->ivsize; } +/** + * crypto_aead_authsize() - obtain maximum authentication data size + * @tfm: cipher handle + * + * The maximum size of the authentication data for the AEAD cipher referenced + * by the AEAD cipher handle is returned. The authentication data size may be + * zero if the cipher implements a hard-coded maximum. + * + * The authentication data may also be known as "tag value". + * + * Return: authentication data size / tag size in bytes + */ static inline unsigned int crypto_aead_authsize(struct crypto_aead *tfm) { return crypto_aead_crt(tfm)->authsize; } +/** + * crypto_aead_blocksize() - obtain block size of cipher + * @tfm: cipher handle + * + * The block size for the AEAD referenced with the cipher handle is returned. + * The caller may use that information to allocate appropriate memory for the + * data returned by the encryption or decryption operation + * + * Return: block size of cipher + */ static inline unsigned int crypto_aead_blocksize(struct crypto_aead *tfm) { return crypto_tfm_alg_blocksize(crypto_aead_tfm(tfm)); @@ -1231,6 +1310,22 @@ static inline void crypto_aead_clear_flags(struct crypto_aead *tfm, u32 flags) crypto_tfm_clear_flags(crypto_aead_tfm(tfm), flags); } +/** + * crypto_aead_setkey() - set key for cipher + * @tfm: cipher handle + * @key: buffer holding the key + * @keylen: length of the key in bytes + * + * The caller provided key is set for the AEAD referenced by the cipher + * handle. + * + * Note, the key length determines the cipher type. Many block ciphers implement + * different cipher modes depending on the key size, such as AES-128 vs AES-192 + * vs. AES-256. When providing a 16 byte key for an AES cipher handle, AES-128 + * is performed. + * + * Return: 0 if the setting of the key was successful; < 0 if an error occurred + */ static inline int crypto_aead_setkey(struct crypto_aead *tfm, const u8 *key, unsigned int keylen) { @@ -1239,6 +1334,16 @@ static inline int crypto_aead_setkey(struct crypto_aead *tfm, const u8 *key, return crt->setkey(crt->base, key, keylen); } +/** + * crypto_aead_setauthsize() - set authentication data size + * @tfm: cipher handle + * @authsize: size of the authentication data / tag in bytes + * + * Set the authentication data size / tag size. AEAD requires an authentication + * tag (or MAC) in addition to the associated data. + * + * Return: 0 if the setting of the key was successful; < 0 if an error occurred + */ int crypto_aead_setauthsize(struct crypto_aead *tfm, unsigned int authsize); static inline struct crypto_aead *crypto_aead_reqtfm(struct aead_request *req) @@ -1246,27 +1351,105 @@ static inline struct crypto_aead *crypto_aead_reqtfm(struct aead_request *req) return __crypto_aead_cast(req->base.tfm); } +/** + * crypto_aead_encrypt() - encrypt plaintext + * @req: reference to the aead_request handle that holds all information + * needed to perform the cipher operation + * + * Encrypt plaintext data using the aead_request handle. That data structure + * and how it is filled with data is discussed with the aead_request_* + * functions. + * + * IMPORTANT NOTE The encryption operation creates the authentication data / + * tag. That data is concatenated with the created ciphertext. + * The ciphertext memory size is therefore the given number of + * block cipher blocks + the size defined by the + * crypto_aead_setauthsize invocation. The caller must ensure + * that sufficient memory is available for the ciphertext and + * the authentication tag. + * + * Return: 0 if the cipher operation was successful; < 0 if an error occurred + */ static inline int crypto_aead_encrypt(struct aead_request *req) { return crypto_aead_crt(crypto_aead_reqtfm(req))->encrypt(req); } +/** + * crypto_aead_decrypt() - decrypt ciphertext + * @req: reference to the ablkcipher_request handle that holds all information + * needed to perform the cipher operation + * + * Decrypt ciphertext data using the aead_request handle. That data structure + * and how it is filled with data is discussed with the aead_request_* + * functions. + * + * IMPORTANT NOTE The caller must concatenate the ciphertext followed by the + * authentication data / tag. That authentication data / tag + * must have the size defined by the crypto_aead_setauthsize + * invocation. + * + * + * Return: 0 if the cipher operation was successful; -EBADMSG: The AEAD + * cipher operation performs the authentication of the data during the + * decryption operation. Therefore, the function returns this error if + * the authentication of the ciphertext was unsuccessful (i.e. the + * integrity of the ciphertext or the associated data was violated); + * < 0 if an error occurred. + */ static inline int crypto_aead_decrypt(struct aead_request *req) { return crypto_aead_crt(crypto_aead_reqtfm(req))->decrypt(req); } +/** + * DOC: Asynchronous AEAD Request Handle + * + * The aead_request data structure contains all pointers to data required for + * the AEAD cipher operation. This includes the cipher handle (which can be + * used by multiple aead_request instances), pointer to plaintext and + * ciphertext, asynchronous callback function, etc. It acts as a handle to the + * aead_request_* API calls in a similar way as AEAD handle to the + * crypto_aead_* API calls. + */ + +/** + * crypto_aead_reqsize() - obtain size of the request data structure + * @tfm: cipher handle + * + * Return: number of bytes + */ static inline unsigned int crypto_aead_reqsize(struct crypto_aead *tfm) { return crypto_aead_crt(tfm)->reqsize; } +/** + * aead_request_set_tfm() - update cipher handle reference in request + * @req: request handle to be modified + * @tfm: cipher handle that shall be added to the request handle + * + * Allow the caller to replace the existing aead handle in the request + * data structure with a different one. + */ static inline void aead_request_set_tfm(struct aead_request *req, struct crypto_aead *tfm) { req->base.tfm = crypto_aead_tfm(crypto_aead_crt(tfm)->base); } +/** + * aead_request_alloc() - allocate request data structure + * @tfm: cipher handle to be registered with the request + * @gfp: memory allocation flag that is handed to kmalloc by the API call. + * + * Allocate the request data structure that must be used with the AEAD + * encrypt and decrypt API calls. During the allocation, the provided aead + * handle is registered in the request data structure. + * + * Return: allocated request handle in case of success; IS_ERR() is true in case + * of an error, PTR_ERR() returns the error code. + */ static inline struct aead_request *aead_request_alloc(struct crypto_aead *tfm, gfp_t gfp) { @@ -1280,11 +1463,40 @@ static inline struct aead_request *aead_request_alloc(struct crypto_aead *tfm, return req; } +/** + * aead_request_free() - zeroize and free request data structure + * @req: request data structure cipher handle to be freed + */ static inline void aead_request_free(struct aead_request *req) { kzfree(req); } +/** + * aead_request_set_callback() - set asynchronous callback function + * @req: request handle + * @flags: specify zero or an ORing of the flags + * CRYPTO_TFM_REQ_MAY_BACKLOG the request queue may back log and + * increase the wait queue beyond the initial maximum size; + * CRYPTO_TFM_REQ_MAY_SLEEP the request processing may sleep + * @compl: callback function pointer to be registered with the request handle + * @data: The data pointer refers to memory that is not used by the kernel + * crypto API, but provided to the callback function for it to use. Here, + * the caller can provide a reference to memory the callback function can + * operate on. As the callback function is invoked asynchronously to the + * related functionality, it may need to access data structures of the + * related functionality which can be referenced using this pointer. The + * callback function can access the memory via the "data" field in the + * crypto_async_request data structure provided to the callback function. + * + * Setting the callback function that is triggered once the cipher operation + * completes + * + * The callback function is registered with the aead_request handle and + * must comply with the following template: + * + * void callback_function(struct crypto_async_request *req, int error) + */ static inline void aead_request_set_callback(struct aead_request *req, u32 flags, crypto_completion_t compl, @@ -1295,6 +1507,36 @@ static inline void aead_request_set_callback(struct aead_request *req, req->base.flags = flags; } +/** + * aead_request_set_crypt - set data buffers + * @req: request handle + * @src: source scatter / gather list + * @dst: destination scatter / gather list + * @cryptlen: number of bytes to process from @src + * @iv: IV for the cipher operation which must comply with the IV size defined + * by crypto_aead_ivsize() + * + * Setting the source data and destination data scatter / gather lists. + * + * For encryption, the source is treated as the plaintext and the + * destination is the ciphertext. For a decryption operation, the use is + * reversed: the source is the ciphertext and the destination is the plaintext. + * + * IMPORTANT NOTE AEAD requires an authentication tag (MAC). For decryption, + * the caller must concatenate the ciphertext followed by the + * authentication tag and provide the entire data stream to the + * decryption operation (i.e. the data length used for the + * initialization of the scatterlist and the data length for the + * decryption operation is identical). For encryption, however, + * the authentication tag is created while encrypting the data. + * The destination buffer must hold sufficient space for the + * ciphertext and the authentication tag while the encryption + * invocation must only point to the plaintext data size. The + * following code snippet illustrates the memory usage + * buffer = kmalloc(ptbuflen + (enc ? authsize : 0)); + * sg_init_one(&sg, buffer, ptbuflen + (enc ? authsize : 0)); + * aead_request_set_crypt(req, &sg, &sg, ptbuflen, iv); + */ static inline void aead_request_set_crypt(struct aead_request *req, struct scatterlist *src, struct scatterlist *dst, @@ -1306,6 +1548,15 @@ static inline void aead_request_set_crypt(struct aead_request *req, req->iv = iv; } +/** + * aead_request_set_assoc() - set the associated data scatter / gather list + * @req: request handle + * @assoc: associated data scatter / gather list + * @assoclen: number of bytes to process from @assoc + * + * For encryption, the memory is filled with the associated data. For + * decryption, the memory must point to the associated data. + */ static inline void aead_request_set_assoc(struct aead_request *req, struct scatterlist *assoc, unsigned int assoclen) -- cgit v1.2.3 From 58284f0d6c4a974d2d89446f3b3cbc51420432ea Mon Sep 17 00:00:00 2001 From: Stephan Mueller Date: Wed, 12 Nov 2014 05:29:36 +0100 Subject: crypto: doc - BLKCIPHER API documentation The API function calls exported by the kernel crypto API for synchronous block ciphers to be used by consumers are documented. Signed-off-by: Stephan Mueller Signed-off-by: Herbert Xu --- include/linux/crypto.h | 188 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 188 insertions(+) (limited to 'include/linux') diff --git a/include/linux/crypto.h b/include/linux/crypto.h index 4704e71a31fe..c9ebe456dc9e 100644 --- a/include/linux/crypto.h +++ b/include/linux/crypto.h @@ -1565,6 +1565,36 @@ static inline void aead_request_set_assoc(struct aead_request *req, req->assoclen = assoclen; } +/** + * DOC: Synchronous Block Cipher API + * + * The synchronous block cipher API is used with the ciphers of type + * CRYPTO_ALG_TYPE_BLKCIPHER (listed as type "blkcipher" in /proc/crypto) + * + * Synchronous calls, have a context in the tfm. But since a single tfm can be + * used in multiple calls and in parallel, this info should not be changeable + * (unless a lock is used). This applies, for example, to the symmetric key. + * However, the IV is changeable, so there is an iv field in blkcipher_tfm + * structure for synchronous blkcipher api. So, its the only state info that can + * be kept for synchronous calls without using a big lock across a tfm. + * + * The block cipher API allows the use of a complete cipher, i.e. a cipher + * consisting of a template (a block chaining mode) and a single block cipher + * primitive (e.g. AES). + * + * The plaintext data buffer and the ciphertext data buffer are pointed to + * by using scatter/gather lists. The cipher operation is performed + * on all segments of the provided scatter/gather lists. + * + * The kernel crypto API supports a cipher operation "in-place" which means that + * the caller may provide the same scatter/gather list for the plaintext and + * cipher text. After the completion of the cipher operation, the plaintext + * data is replaced with the ciphertext data in case of an encryption and vice + * versa for a decryption. The caller must ensure that the scatter/gather lists + * for the output data point to sufficiently large buffers, i.e. multiples of + * the block size of the cipher. + */ + static inline struct crypto_blkcipher *__crypto_blkcipher_cast( struct crypto_tfm *tfm) { @@ -1578,6 +1608,20 @@ static inline struct crypto_blkcipher *crypto_blkcipher_cast( return __crypto_blkcipher_cast(tfm); } +/** + * crypto_alloc_blkcipher() - allocate synchronous block cipher handle + * @alg_name: is the cra_name / name or cra_driver_name / driver name of the + * blkcipher cipher + * @type: specifies the type of the cipher + * @mask: specifies the mask for the cipher + * + * Allocate a cipher handle for a block cipher. The returned struct + * crypto_blkcipher is the cipher handle that is required for any subsequent + * API invocation for that block cipher. + * + * Return: allocated cipher handle in case of success; IS_ERR() is true in case + * of an error, PTR_ERR() returns the error code. + */ static inline struct crypto_blkcipher *crypto_alloc_blkcipher( const char *alg_name, u32 type, u32 mask) { @@ -1594,11 +1638,25 @@ static inline struct crypto_tfm *crypto_blkcipher_tfm( return &tfm->base; } +/** + * crypto_free_blkcipher() - zeroize and free the block cipher handle + * @tfm: cipher handle to be freed + */ static inline void crypto_free_blkcipher(struct crypto_blkcipher *tfm) { crypto_free_tfm(crypto_blkcipher_tfm(tfm)); } +/** + * crypto_has_blkcipher() - Search for the availability of a block cipher + * @alg_name: is the cra_name / name or cra_driver_name / driver name of the + * block cipher + * @type: specifies the type of the cipher + * @mask: specifies the mask for the cipher + * + * Return: true when the block cipher is known to the kernel crypto API; false + * otherwise + */ static inline int crypto_has_blkcipher(const char *alg_name, u32 type, u32 mask) { type &= ~CRYPTO_ALG_TYPE_MASK; @@ -1608,6 +1666,12 @@ static inline int crypto_has_blkcipher(const char *alg_name, u32 type, u32 mask) return crypto_has_alg(alg_name, type, mask); } +/** + * crypto_blkcipher_name() - return the name / cra_name from the cipher handle + * @tfm: cipher handle + * + * Return: The character string holding the name of the cipher + */ static inline const char *crypto_blkcipher_name(struct crypto_blkcipher *tfm) { return crypto_tfm_alg_name(crypto_blkcipher_tfm(tfm)); @@ -1625,11 +1689,30 @@ static inline struct blkcipher_alg *crypto_blkcipher_alg( return &crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher; } +/** + * crypto_blkcipher_ivsize() - obtain IV size + * @tfm: cipher handle + * + * The size of the IV for the block cipher referenced by the cipher handle is + * returned. This IV size may be zero if the cipher does not need an IV. + * + * Return: IV size in bytes + */ static inline unsigned int crypto_blkcipher_ivsize(struct crypto_blkcipher *tfm) { return crypto_blkcipher_alg(tfm)->ivsize; } +/** + * crypto_blkcipher_blocksize() - obtain block size of cipher + * @tfm: cipher handle + * + * The block size for the block cipher referenced with the cipher handle is + * returned. The caller may use that information to allocate appropriate + * memory for the data returned by the encryption or decryption operation. + * + * Return: block size of cipher + */ static inline unsigned int crypto_blkcipher_blocksize( struct crypto_blkcipher *tfm) { @@ -1659,6 +1742,22 @@ static inline void crypto_blkcipher_clear_flags(struct crypto_blkcipher *tfm, crypto_tfm_clear_flags(crypto_blkcipher_tfm(tfm), flags); } +/** + * crypto_blkcipher_setkey() - set key for cipher + * @tfm: cipher handle + * @key: buffer holding the key + * @keylen: length of the key in bytes + * + * The caller provided key is set for the block cipher referenced by the cipher + * handle. + * + * Note, the key length determines the cipher type. Many block ciphers implement + * different cipher modes depending on the key size, such as AES-128 vs AES-192 + * vs. AES-256. When providing a 16 byte key for an AES cipher handle, AES-128 + * is performed. + * + * Return: 0 if the setting of the key was successful; < 0 if an error occurred + */ static inline int crypto_blkcipher_setkey(struct crypto_blkcipher *tfm, const u8 *key, unsigned int keylen) { @@ -1666,6 +1765,24 @@ static inline int crypto_blkcipher_setkey(struct crypto_blkcipher *tfm, key, keylen); } +/** + * crypto_blkcipher_encrypt() - encrypt plaintext + * @desc: reference to the block cipher handle with meta data + * @dst: scatter/gather list that is filled by the cipher operation with the + * ciphertext + * @src: scatter/gather list that holds the plaintext + * @nbytes: number of bytes of the plaintext to encrypt. + * + * Encrypt plaintext data using the IV set by the caller with a preceding + * call of crypto_blkcipher_set_iv. + * + * The blkcipher_desc data structure must be filled by the caller and can + * reside on the stack. The caller must fill desc as follows: desc.tfm is filled + * with the block cipher handle; desc.flags is filled with either + * CRYPTO_TFM_REQ_MAY_SLEEP or 0. + * + * Return: 0 if the cipher operation was successful; < 0 if an error occurred + */ static inline int crypto_blkcipher_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, @@ -1675,6 +1792,25 @@ static inline int crypto_blkcipher_encrypt(struct blkcipher_desc *desc, return crypto_blkcipher_crt(desc->tfm)->encrypt(desc, dst, src, nbytes); } +/** + * crypto_blkcipher_encrypt_iv() - encrypt plaintext with dedicated IV + * @desc: reference to the block cipher handle with meta data + * @dst: scatter/gather list that is filled by the cipher operation with the + * ciphertext + * @src: scatter/gather list that holds the plaintext + * @nbytes: number of bytes of the plaintext to encrypt. + * + * Encrypt plaintext data with the use of an IV that is solely used for this + * cipher operation. Any previously set IV is not used. + * + * The blkcipher_desc data structure must be filled by the caller and can + * reside on the stack. The caller must fill desc as follows: desc.tfm is filled + * with the block cipher handle; desc.info is filled with the IV to be used for + * the current operation; desc.flags is filled with either + * CRYPTO_TFM_REQ_MAY_SLEEP or 0. + * + * Return: 0 if the cipher operation was successful; < 0 if an error occurred + */ static inline int crypto_blkcipher_encrypt_iv(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, @@ -1683,6 +1819,23 @@ static inline int crypto_blkcipher_encrypt_iv(struct blkcipher_desc *desc, return crypto_blkcipher_crt(desc->tfm)->encrypt(desc, dst, src, nbytes); } +/** + * crypto_blkcipher_decrypt() - decrypt ciphertext + * @desc: reference to the block cipher handle with meta data + * @dst: scatter/gather list that is filled by the cipher operation with the + * plaintext + * @src: scatter/gather list that holds the ciphertext + * @nbytes: number of bytes of the ciphertext to decrypt. + * + * Decrypt ciphertext data using the IV set by the caller with a preceding + * call of crypto_blkcipher_set_iv. + * + * The blkcipher_desc data structure must be filled by the caller as documented + * for the crypto_blkcipher_encrypt call above. + * + * Return: 0 if the cipher operation was successful; < 0 if an error occurred + * + */ static inline int crypto_blkcipher_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, @@ -1692,6 +1845,22 @@ static inline int crypto_blkcipher_decrypt(struct blkcipher_desc *desc, return crypto_blkcipher_crt(desc->tfm)->decrypt(desc, dst, src, nbytes); } +/** + * crypto_blkcipher_decrypt_iv() - decrypt ciphertext with dedicated IV + * @desc: reference to the block cipher handle with meta data + * @dst: scatter/gather list that is filled by the cipher operation with the + * plaintext + * @src: scatter/gather list that holds the ciphertext + * @nbytes: number of bytes of the ciphertext to decrypt. + * + * Decrypt ciphertext data with the use of an IV that is solely used for this + * cipher operation. Any previously set IV is not used. + * + * The blkcipher_desc data structure must be filled by the caller as documented + * for the crypto_blkcipher_encrypt_iv call above. + * + * Return: 0 if the cipher operation was successful; < 0 if an error occurred + */ static inline int crypto_blkcipher_decrypt_iv(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, @@ -1700,12 +1869,31 @@ static inline int crypto_blkcipher_decrypt_iv(struct blkcipher_desc *desc, return crypto_blkcipher_crt(desc->tfm)->decrypt(desc, dst, src, nbytes); } +/** + * crypto_blkcipher_set_iv() - set IV for cipher + * @tfm: cipher handle + * @src: buffer holding the IV + * @len: length of the IV in bytes + * + * The caller provided IV is set for the block cipher referenced by the cipher + * handle. + */ static inline void crypto_blkcipher_set_iv(struct crypto_blkcipher *tfm, const u8 *src, unsigned int len) { memcpy(crypto_blkcipher_crt(tfm)->iv, src, len); } +/** + * crypto_blkcipher_get_iv() - obtain IV from cipher + * @tfm: cipher handle + * @dst: buffer filled with the IV + * @len: length of the buffer dst + * + * The caller can obtain the IV set for the block cipher referenced by the + * cipher handle and store it into the user-provided buffer. If the buffer + * has an insufficient space, the IV is truncated to fit the buffer. + */ static inline void crypto_blkcipher_get_iv(struct crypto_blkcipher *tfm, u8 *dst, unsigned int len) { -- cgit v1.2.3 From 16e61030aecb250766cf175141fc91d441361c43 Mon Sep 17 00:00:00 2001 From: Stephan Mueller Date: Wed, 12 Nov 2014 05:30:06 +0100 Subject: crypto: doc - CIPHER API documentation The API function calls exported by the kernel crypto API for signle block ciphers to be used by consumers are documented. Signed-off-by: Stephan Mueller Signed-off-by: Herbert Xu --- include/linux/crypto.h | 89 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 89 insertions(+) (limited to 'include/linux') diff --git a/include/linux/crypto.h b/include/linux/crypto.h index c9ebe456dc9e..0f95a07aa4df 100644 --- a/include/linux/crypto.h +++ b/include/linux/crypto.h @@ -1900,6 +1900,23 @@ static inline void crypto_blkcipher_get_iv(struct crypto_blkcipher *tfm, memcpy(dst, crypto_blkcipher_crt(tfm)->iv, len); } +/** + * DOC: Single Block Cipher API + * + * The single block cipher API is used with the ciphers of type + * CRYPTO_ALG_TYPE_CIPHER (listed as type "cipher" in /proc/crypto). + * + * Using the single block cipher API calls, operations with the basic cipher + * primitive can be implemented. These cipher primitives exclude any block + * chaining operations including IV handling. + * + * The purpose of this single block cipher API is to support the implementation + * of templates or other concepts that only need to perform the cipher operation + * on one block at a time. Templates invoke the underlying cipher primitive + * block-wise and process either the input or the output data of these cipher + * operations. + */ + static inline struct crypto_cipher *__crypto_cipher_cast(struct crypto_tfm *tfm) { return (struct crypto_cipher *)tfm; @@ -1911,6 +1928,20 @@ static inline struct crypto_cipher *crypto_cipher_cast(struct crypto_tfm *tfm) return __crypto_cipher_cast(tfm); } +/** + * crypto_alloc_cipher() - allocate single block cipher handle + * @alg_name: is the cra_name / name or cra_driver_name / driver name of the + * single block cipher + * @type: specifies the type of the cipher + * @mask: specifies the mask for the cipher + * + * Allocate a cipher handle for a single block cipher. The returned struct + * crypto_cipher is the cipher handle that is required for any subsequent API + * invocation for that single block cipher. + * + * Return: allocated cipher handle in case of success; IS_ERR() is true in case + * of an error, PTR_ERR() returns the error code. + */ static inline struct crypto_cipher *crypto_alloc_cipher(const char *alg_name, u32 type, u32 mask) { @@ -1926,11 +1957,25 @@ static inline struct crypto_tfm *crypto_cipher_tfm(struct crypto_cipher *tfm) return &tfm->base; } +/** + * crypto_free_cipher() - zeroize and free the single block cipher handle + * @tfm: cipher handle to be freed + */ static inline void crypto_free_cipher(struct crypto_cipher *tfm) { crypto_free_tfm(crypto_cipher_tfm(tfm)); } +/** + * crypto_has_cipher() - Search for the availability of a single block cipher + * @alg_name: is the cra_name / name or cra_driver_name / driver name of the + * single block cipher + * @type: specifies the type of the cipher + * @mask: specifies the mask for the cipher + * + * Return: true when the single block cipher is known to the kernel crypto API; + * false otherwise + */ static inline int crypto_has_cipher(const char *alg_name, u32 type, u32 mask) { type &= ~CRYPTO_ALG_TYPE_MASK; @@ -1945,6 +1990,16 @@ static inline struct cipher_tfm *crypto_cipher_crt(struct crypto_cipher *tfm) return &crypto_cipher_tfm(tfm)->crt_cipher; } +/** + * crypto_cipher_blocksize() - obtain block size for cipher + * @tfm: cipher handle + * + * The block size for the single block cipher referenced with the cipher handle + * tfm is returned. The caller may use that information to allocate appropriate + * memory for the data returned by the encryption or decryption operation + * + * Return: block size of cipher + */ static inline unsigned int crypto_cipher_blocksize(struct crypto_cipher *tfm) { return crypto_tfm_alg_blocksize(crypto_cipher_tfm(tfm)); @@ -1972,6 +2027,22 @@ static inline void crypto_cipher_clear_flags(struct crypto_cipher *tfm, crypto_tfm_clear_flags(crypto_cipher_tfm(tfm), flags); } +/** + * crypto_cipher_setkey() - set key for cipher + * @tfm: cipher handle + * @key: buffer holding the key + * @keylen: length of the key in bytes + * + * The caller provided key is set for the single block cipher referenced by the + * cipher handle. + * + * Note, the key length determines the cipher type. Many block ciphers implement + * different cipher modes depending on the key size, such as AES-128 vs AES-192 + * vs. AES-256. When providing a 16 byte key for an AES cipher handle, AES-128 + * is performed. + * + * Return: 0 if the setting of the key was successful; < 0 if an error occurred + */ static inline int crypto_cipher_setkey(struct crypto_cipher *tfm, const u8 *key, unsigned int keylen) { @@ -1979,6 +2050,15 @@ static inline int crypto_cipher_setkey(struct crypto_cipher *tfm, key, keylen); } +/** + * crypto_cipher_encrypt_one() - encrypt one block of plaintext + * @tfm: cipher handle + * @dst: points to the buffer that will be filled with the ciphertext + * @src: buffer holding the plaintext to be encrypted + * + * Invoke the encryption operation of one block. The caller must ensure that + * the plaintext and ciphertext buffers are at least one block in size. + */ static inline void crypto_cipher_encrypt_one(struct crypto_cipher *tfm, u8 *dst, const u8 *src) { @@ -1986,6 +2066,15 @@ static inline void crypto_cipher_encrypt_one(struct crypto_cipher *tfm, dst, src); } +/** + * crypto_cipher_decrypt_one() - decrypt one block of ciphertext + * @tfm: cipher handle + * @dst: points to the buffer that will be filled with the plaintext + * @src: buffer holding the ciphertext to be decrypted + * + * Invoke the decryption operation of one block. The caller must ensure that + * the plaintext and ciphertext buffers are at least one block in size. + */ static inline void crypto_cipher_decrypt_one(struct crypto_cipher *tfm, u8 *dst, const u8 *src) { -- cgit v1.2.3 From 47ca5be9eb066befe284f4e03fc11f21b8321ddc Mon Sep 17 00:00:00 2001 From: Stephan Mueller Date: Wed, 12 Nov 2014 05:30:42 +0100 Subject: crypto: doc - HASH API documentation The API function calls exported by the kernel crypto API for message digests to be used by consumers are documented. Signed-off-by: Stephan Mueller Signed-off-by: Herbert Xu --- include/linux/crypto.h | 119 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 119 insertions(+) (limited to 'include/linux') diff --git a/include/linux/crypto.h b/include/linux/crypto.h index 0f95a07aa4df..208a63290b23 100644 --- a/include/linux/crypto.h +++ b/include/linux/crypto.h @@ -2082,6 +2082,13 @@ static inline void crypto_cipher_decrypt_one(struct crypto_cipher *tfm, dst, src); } +/** + * DOC: Synchronous Message Digest API + * + * The synchronous message digest API is used with the ciphers of type + * CRYPTO_ALG_TYPE_HASH (listed as type "hash" in /proc/crypto) + */ + static inline struct crypto_hash *__crypto_hash_cast(struct crypto_tfm *tfm) { return (struct crypto_hash *)tfm; @@ -2094,6 +2101,20 @@ static inline struct crypto_hash *crypto_hash_cast(struct crypto_tfm *tfm) return __crypto_hash_cast(tfm); } +/** + * crypto_alloc_hash() - allocate synchronous message digest handle + * @alg_name: is the cra_name / name or cra_driver_name / driver name of the + * message digest cipher + * @type: specifies the type of the cipher + * @mask: specifies the mask for the cipher + * + * Allocate a cipher handle for a message digest. The returned struct + * crypto_hash is the cipher handle that is required for any subsequent + * API invocation for that message digest. + * + * Return: allocated cipher handle in case of success; IS_ERR() is true in case + * of an error, PTR_ERR() returns the error code. + */ static inline struct crypto_hash *crypto_alloc_hash(const char *alg_name, u32 type, u32 mask) { @@ -2110,11 +2131,25 @@ static inline struct crypto_tfm *crypto_hash_tfm(struct crypto_hash *tfm) return &tfm->base; } +/** + * crypto_free_hash() - zeroize and free message digest handle + * @tfm: cipher handle to be freed + */ static inline void crypto_free_hash(struct crypto_hash *tfm) { crypto_free_tfm(crypto_hash_tfm(tfm)); } +/** + * crypto_has_hash() - Search for the availability of a message digest + * @alg_name: is the cra_name / name or cra_driver_name / driver name of the + * message digest cipher + * @type: specifies the type of the cipher + * @mask: specifies the mask for the cipher + * + * Return: true when the message digest cipher is known to the kernel crypto + * API; false otherwise + */ static inline int crypto_has_hash(const char *alg_name, u32 type, u32 mask) { type &= ~CRYPTO_ALG_TYPE_MASK; @@ -2130,6 +2165,15 @@ static inline struct hash_tfm *crypto_hash_crt(struct crypto_hash *tfm) return &crypto_hash_tfm(tfm)->crt_hash; } +/** + * crypto_hash_blocksize() - obtain block size for message digest + * @tfm: cipher handle + * + * The block size for the message digest cipher referenced with the cipher + * handle is returned. + * + * Return: block size of cipher + */ static inline unsigned int crypto_hash_blocksize(struct crypto_hash *tfm) { return crypto_tfm_alg_blocksize(crypto_hash_tfm(tfm)); @@ -2140,6 +2184,15 @@ static inline unsigned int crypto_hash_alignmask(struct crypto_hash *tfm) return crypto_tfm_alg_alignmask(crypto_hash_tfm(tfm)); } +/** + * crypto_hash_digestsize() - obtain message digest size + * @tfm: cipher handle + * + * The size for the message digest created by the message digest cipher + * referenced with the cipher handle is returned. + * + * Return: message digest size + */ static inline unsigned int crypto_hash_digestsize(struct crypto_hash *tfm) { return crypto_hash_crt(tfm)->digestsize; @@ -2160,11 +2213,38 @@ static inline void crypto_hash_clear_flags(struct crypto_hash *tfm, u32 flags) crypto_tfm_clear_flags(crypto_hash_tfm(tfm), flags); } +/** + * crypto_hash_init() - (re)initialize message digest handle + * @desc: cipher request handle that to be filled by caller -- + * desc.tfm is filled with the hash cipher handle; + * desc.flags is filled with either CRYPTO_TFM_REQ_MAY_SLEEP or 0. + * + * The call (re-)initializes the message digest referenced by the hash cipher + * request handle. Any potentially existing state created by previous + * operations is discarded. + * + * Return: 0 if the message digest initialization was successful; < 0 if an + * error occurred + */ static inline int crypto_hash_init(struct hash_desc *desc) { return crypto_hash_crt(desc->tfm)->init(desc); } +/** + * crypto_hash_update() - add data to message digest for processing + * @desc: cipher request handle + * @sg: scatter / gather list pointing to the data to be added to the message + * digest + * @nbytes: number of bytes to be processed from @sg + * + * Updates the message digest state of the cipher handle pointed to by the + * hash cipher request handle with the input data pointed to by the + * scatter/gather list. + * + * Return: 0 if the message digest update was successful; < 0 if an error + * occurred + */ static inline int crypto_hash_update(struct hash_desc *desc, struct scatterlist *sg, unsigned int nbytes) @@ -2172,11 +2252,39 @@ static inline int crypto_hash_update(struct hash_desc *desc, return crypto_hash_crt(desc->tfm)->update(desc, sg, nbytes); } +/** + * crypto_hash_final() - calculate message digest + * @desc: cipher request handle + * @out: message digest output buffer -- The caller must ensure that the out + * buffer has a sufficient size (e.g. by using the crypto_hash_digestsize + * function). + * + * Finalize the message digest operation and create the message digest + * based on all data added to the cipher handle. The message digest is placed + * into the output buffer. + * + * Return: 0 if the message digest creation was successful; < 0 if an error + * occurred + */ static inline int crypto_hash_final(struct hash_desc *desc, u8 *out) { return crypto_hash_crt(desc->tfm)->final(desc, out); } +/** + * crypto_hash_digest() - calculate message digest for a buffer + * @desc: see crypto_hash_final() + * @sg: see crypto_hash_update() + * @nbytes: see crypto_hash_update() + * @out: see crypto_hash_final() + * + * This function is a "short-hand" for the function calls of crypto_hash_init, + * crypto_hash_update and crypto_hash_final. The parameters have the same + * meaning as discussed for those separate three functions. + * + * Return: 0 if the message digest creation was successful; < 0 if an error + * occurred + */ static inline int crypto_hash_digest(struct hash_desc *desc, struct scatterlist *sg, unsigned int nbytes, u8 *out) @@ -2184,6 +2292,17 @@ static inline int crypto_hash_digest(struct hash_desc *desc, return crypto_hash_crt(desc->tfm)->digest(desc, sg, nbytes, out); } +/** + * crypto_hash_setkey() - set key for message digest + * @hash: cipher handle + * @key: buffer holding the key + * @keylen: length of the key in bytes + * + * The caller provided key is set for the message digest cipher. The cipher + * handle must point to a keyed hash in order for this function to succeed. + * + * Return: 0 if the setting of the key was successful; < 0 if an error occurred + */ static inline int crypto_hash_setkey(struct crypto_hash *hash, const u8 *key, unsigned int keylen) { -- cgit v1.2.3 From a4acded086c4320bc58bd59ea746fd19de6dabb0 Mon Sep 17 00:00:00 2001 From: Gavin Shan Date: Wed, 12 Nov 2014 13:43:52 +1100 Subject: PCI: Remove unused and broken to_hotplug_slot() to_hotplug_slot() is unused and wouldn't work anyway, because struct hotplug_slot no longer contains a struct kobject (it was removed by f46753c5e354 ("PCI: introduce pci_slot")). Remove to_hotplug_slot(). [bhelgaas: changelog] Signed-off-by: Gavin Shan Signed-off-by: Bjorn Helgaas --- include/linux/pci_hotplug.h | 1 - 1 file changed, 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/pci_hotplug.h b/include/linux/pci_hotplug.h index 2706ee9a4327..8c7895061121 100644 --- a/include/linux/pci_hotplug.h +++ b/include/linux/pci_hotplug.h @@ -109,7 +109,6 @@ struct hotplug_slot { struct list_head slot_list; struct pci_slot *pci_slot; }; -#define to_hotplug_slot(n) container_of(n, struct hotplug_slot, kobj) static inline const char *hotplug_slot_name(const struct hotplug_slot *slot) { -- cgit v1.2.3 From 1a6c9b2675460718f819def9a272cca35575eeb7 Mon Sep 17 00:00:00 2001 From: Pranith Kumar Date: Thu, 25 Sep 2014 14:03:34 -0400 Subject: rcu: Add sparse check for RCU_INIT_POINTER() Add a sparse check when RCU_INIT_POINTER() is used to assign a non __rcu annotated pointer. Signed-off-by: Pranith Kumar Signed-off-by: Paul E. McKenney --- include/linux/rcupdate.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h index a4a819ffb2d1..a033d8b55773 100644 --- a/include/linux/rcupdate.h +++ b/include/linux/rcupdate.h @@ -1047,6 +1047,7 @@ static inline notrace void rcu_read_unlock_sched_notrace(void) */ #define RCU_INIT_POINTER(p, v) \ do { \ + rcu_dereference_sparse(p, __rcu); \ p = RCU_INITIALIZER(v); \ } while (0) -- cgit v1.2.3 From b6331ae8afe4118884c4b6e14a213758d88422b2 Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Sat, 4 Oct 2014 03:43:41 -0700 Subject: rcu: Optimize cond_resched_rcu_qs() The current implementation of cond_resched_rcu_qs() can invoke rcu_note_voluntary_context_switch() twice in the should_resched() case, once via the call to __schedule() and once directly. However, as noted by Joe Lawrence in a patch to the team subsystem, cond_resched() returns an indication as to whether or not the call to __schedule() actually happened. This commit therefore changes cond_resched_rcu_qs() so as to invoke rcu_note_voluntary_context_switch() only when __schedule() was not called. Signed-off-by: Paul E. McKenney --- include/linux/rcupdate.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h index a033d8b55773..36ea3ba5c516 100644 --- a/include/linux/rcupdate.h +++ b/include/linux/rcupdate.h @@ -348,8 +348,8 @@ extern struct srcu_struct tasks_rcu_exit_srcu; */ #define cond_resched_rcu_qs() \ do { \ - rcu_note_voluntary_context_switch(current); \ - cond_resched(); \ + if (!cond_resched()) \ + rcu_note_voluntary_context_switch(current); \ } while (0) #if defined(CONFIG_DEBUG_LOCK_ALLOC) || defined(CONFIG_RCU_TRACE) || defined(CONFIG_SMP) -- cgit v1.2.3 From ce36f2f3eb6613a73bc6f3a5256bde7dd3f95710 Mon Sep 17 00:00:00 2001 From: Oleg Nesterov Date: Sun, 28 Sep 2014 23:44:21 +0200 Subject: rcu: More info about potential deadlocks with rcu_read_unlock() The comment above rcu_read_unlock() explains the potential deadlock if the caller holds one of the locks taken by rt_mutex_unlock() paths, but it is not clear from this documentation that any lock which can be taken from interrupt can lead to deadlock as well and we need to take rt_mutex_lock() into account too. The problem is that rt_mutex_lock() takes wait_lock without disabling irqs, and thus an interrupt taking some LOCK can obviously race with rcu_read_unlock_special() called with the same LOCK held. Signed-off-by: Oleg Nesterov Signed-off-by: Paul E. McKenney --- include/linux/rcupdate.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h index 36ea3ba5c516..ae6942a84a0d 100644 --- a/include/linux/rcupdate.h +++ b/include/linux/rcupdate.h @@ -887,7 +887,9 @@ static inline void rcu_read_lock(void) * Unfortunately, this function acquires the scheduler's runqueue and * priority-inheritance spinlocks. This means that deadlock could result * if the caller of rcu_read_unlock() already holds one of these locks or - * any lock that is ever acquired while holding them. + * any lock that is ever acquired while holding them; or any lock which + * can be taken from interrupt context because rcu_boost()->rt_mutex_lock() + * does not disable irqs while taking ->wait_lock. * * That said, RCU readers are never priority boosted unless they were * preempted. Therefore, one way to avoid deadlock is to make sure -- cgit v1.2.3 From 1b2f309d70daf04b6a97b3753e375654532f6207 Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Thu, 13 Nov 2014 18:11:20 +0800 Subject: rhashtable: Move mutex_is_held under PROVE_LOCKING The rhashtable function mutex_is_held is only used when PROVE_LOCKING is enabled. This patch makes the mutex_is_held field in rhashtable optional depending on PROVE_LOCKING. Signed-off-by: Herbert Xu Signed-off-by: David S. Miller --- include/linux/rhashtable.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/linux') diff --git a/include/linux/rhashtable.h b/include/linux/rhashtable.h index fb298e9d6d3a..96ce8ceff554 100644 --- a/include/linux/rhashtable.h +++ b/include/linux/rhashtable.h @@ -65,7 +65,9 @@ struct rhashtable_params { size_t new_size); bool (*shrink_decision)(const struct rhashtable *ht, size_t new_size); +#ifdef CONFIG_PROVE_LOCKING int (*mutex_is_held)(void); +#endif }; /** -- cgit v1.2.3 From 7b4ce2353467fdab6e003be7a3129fb09b09deac Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Thu, 13 Nov 2014 18:11:22 +0800 Subject: rhashtable: Add parent argument to mutex_is_held Currently mutex_is_held can only test locks in the that are global since it takes no arguments. This prevents rhashtable from being used in places where locks are lock, e.g., per-namespace locks. This patch adds a parent field to mutex_is_held and rhashtable_params so that local locks can be used (and tested). Signed-off-by: Herbert Xu Signed-off-by: David S. Miller --- include/linux/rhashtable.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/rhashtable.h b/include/linux/rhashtable.h index 96ce8ceff554..473e26bdb91d 100644 --- a/include/linux/rhashtable.h +++ b/include/linux/rhashtable.h @@ -66,7 +66,8 @@ struct rhashtable_params { bool (*shrink_decision)(const struct rhashtable *ht, size_t new_size); #ifdef CONFIG_PROVE_LOCKING - int (*mutex_is_held)(void); + int (*mutex_is_held)(void *parent); + void *parent; #endif }; -- cgit v1.2.3 From 7ae0e400cd9396c41fe596d35dcc34feaa89a04f Mon Sep 17 00:00:00 2001 From: Matan Barak Date: Thu, 13 Nov 2014 14:45:32 +0200 Subject: net/mlx4_core: Flexible (asymmetric) allocation of EQs and MSI-X vectors for PF/VFs Previously, the driver queried the firmware in order to get the number of supported EQs. Under SRIOV, since this was done before the driver notified the firmware how many VFs it actually needs, the firmware had to take into account a worst case scenario and always allocated four EQs per VF, where one was used for events while the others were used for completions. Now, when the firmware supports the asymmetric allocation scheme, denoted by exposing num_sys_eqs > 0 (--> MLX4_DEV_CAP_FLAG2_SYS_EQS), we use the QUERY_FUNC command to query the firmware before enabling SRIOV. Thus we can get more EQs and MSI-X vectors per function. Moreover, when running in the new firmware/driver mode, the limitation that the number of EQs should be a power of two is lifted. Signed-off-by: Jack Morgenstein Signed-off-by: Matan Barak Signed-off-by: Or Gerlitz Signed-off-by: David S. Miller --- include/linux/mlx4/device.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h index 3d9bff00f24a..1c560eb870ad 100644 --- a/include/linux/mlx4/device.h +++ b/include/linux/mlx4/device.h @@ -189,7 +189,8 @@ enum { MLX4_DEV_CAP_FLAG2_EQE_STRIDE = 1LL << 13, MLX4_DEV_CAP_FLAG2_ETH_PROT_CTRL = 1LL << 14, MLX4_DEV_CAP_FLAG2_ETH_BACKPL_AN_REP = 1LL << 15, - MLX4_DEV_CAP_FLAG2_CONFIG_DEV = 1LL << 16 + MLX4_DEV_CAP_FLAG2_CONFIG_DEV = 1LL << 16, + MLX4_DEV_CAP_FLAG2_SYS_EQS = 1LL << 17 }; enum { @@ -443,6 +444,7 @@ struct mlx4_caps { int num_cqs; int max_cqes; int reserved_cqs; + int num_sys_eqs; int num_eqs; int reserved_eqs; int num_comp_vectors; -- cgit v1.2.3 From de966c5928026b100a989c8cef761d306310a184 Mon Sep 17 00:00:00 2001 From: Matan Barak Date: Thu, 13 Nov 2014 14:45:33 +0200 Subject: net/mlx4_core: Support more than 64 VFs We now allow up to 126 VFs. Note though that certain firmware versions only allow up to 80 VFs. Moreover, old HCAs only support 64 VFs. In these cases, we limit the maximum number of VFs to 64. Signed-off-by: Matan Barak Signed-off-by: Or Gerlitz Signed-off-by: David S. Miller --- include/linux/mlx4/device.h | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h index 1c560eb870ad..cf09e65c2901 100644 --- a/include/linux/mlx4/device.h +++ b/include/linux/mlx4/device.h @@ -95,7 +95,7 @@ enum { enum { MLX4_MAX_NUM_PF = 16, - MLX4_MAX_NUM_VF = 64, + MLX4_MAX_NUM_VF = 126, MLX4_MAX_NUM_VF_P_PORT = 64, MLX4_MFUNC_MAX = 80, MLX4_MAX_EQ_NUM = 1024, @@ -190,7 +190,8 @@ enum { MLX4_DEV_CAP_FLAG2_ETH_PROT_CTRL = 1LL << 14, MLX4_DEV_CAP_FLAG2_ETH_BACKPL_AN_REP = 1LL << 15, MLX4_DEV_CAP_FLAG2_CONFIG_DEV = 1LL << 16, - MLX4_DEV_CAP_FLAG2_SYS_EQS = 1LL << 17 + MLX4_DEV_CAP_FLAG2_SYS_EQS = 1LL << 17, + MLX4_DEV_CAP_FLAG2_80_VFS = 1LL << 18 }; enum { -- cgit v1.2.3 From 6eba82248ef47fd478f940a418429e3ec95cb3db Mon Sep 17 00:00:00 2001 From: Thomas Graf Date: Thu, 13 Nov 2014 13:45:46 +0100 Subject: rhashtable: Drop gfp_flags arg in insert/remove functions Reallocation is only required for shrinking and expanding and both rely on a mutex for synchronization and callers of rhashtable_init() are in non atomic context. Therefore, no reason to continue passing allocation hints through the API. Instead, use GFP_KERNEL and add __GFP_NOWARN | __GFP_NORETRY to allow for silent fall back to vzalloc() without the OOM killer jumping in as pointed out by Eric Dumazet and Eric W. Biederman. Signed-off-by: Thomas Graf Signed-off-by: David S. Miller --- include/linux/rhashtable.h | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'include/linux') diff --git a/include/linux/rhashtable.h b/include/linux/rhashtable.h index 473e26bdb91d..b93fd89b2e5e 100644 --- a/include/linux/rhashtable.h +++ b/include/linux/rhashtable.h @@ -99,16 +99,16 @@ int rhashtable_init(struct rhashtable *ht, struct rhashtable_params *params); u32 rhashtable_hashfn(const struct rhashtable *ht, const void *key, u32 len); u32 rhashtable_obj_hashfn(const struct rhashtable *ht, void *ptr); -void rhashtable_insert(struct rhashtable *ht, struct rhash_head *node, gfp_t); -bool rhashtable_remove(struct rhashtable *ht, struct rhash_head *node, gfp_t); +void rhashtable_insert(struct rhashtable *ht, struct rhash_head *node); +bool rhashtable_remove(struct rhashtable *ht, struct rhash_head *node); void rhashtable_remove_pprev(struct rhashtable *ht, struct rhash_head *obj, - struct rhash_head __rcu **pprev, gfp_t flags); + struct rhash_head __rcu **pprev); bool rht_grow_above_75(const struct rhashtable *ht, size_t new_size); bool rht_shrink_below_30(const struct rhashtable *ht, size_t new_size); -int rhashtable_expand(struct rhashtable *ht, gfp_t flags); -int rhashtable_shrink(struct rhashtable *ht, gfp_t flags); +int rhashtable_expand(struct rhashtable *ht); +int rhashtable_shrink(struct rhashtable *ht); void *rhashtable_lookup(const struct rhashtable *ht, const void *key); void *rhashtable_lookup_compare(const struct rhashtable *ht, u32 hash, -- cgit v1.2.3 From f30c59e921f12b209852e1ddc197dc6a8fb0142b Mon Sep 17 00:00:00 2001 From: "Aneesh Kumar K.V" Date: Wed, 5 Nov 2014 21:57:40 +0530 Subject: mm: Update generic gup implementation to handle hugepage directory Update generic gup implementation with powerpc specific details. On powerpc at pmd level we can have hugepte, normal pmd pointer or a pointer to the hugepage directory. Tested-by: Steve Capper Acked-by: Steve Capper Signed-off-by: Aneesh Kumar K.V Signed-off-by: Michael Ellerman --- include/linux/hugetlb.h | 46 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) (limited to 'include/linux') diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h index 6e6d338641fe..e6b62f30ab21 100644 --- a/include/linux/hugetlb.h +++ b/include/linux/hugetlb.h @@ -175,6 +175,52 @@ static inline void __unmap_hugepage_range(struct mmu_gather *tlb, } #endif /* !CONFIG_HUGETLB_PAGE */ +/* + * hugepages at page global directory. If arch support + * hugepages at pgd level, they need to define this. + */ +#ifndef pgd_huge +#define pgd_huge(x) 0 +#endif + +#ifndef pgd_write +static inline int pgd_write(pgd_t pgd) +{ + BUG(); + return 0; +} +#endif + +#ifndef pud_write +static inline int pud_write(pud_t pud) +{ + BUG(); + return 0; +} +#endif + +#ifndef is_hugepd +/* + * Some architectures requires a hugepage directory format that is + * required to support multiple hugepage sizes. For example + * a4fe3ce76 "powerpc/mm: Allow more flexible layouts for hugepage pagetables" + * introduced the same on powerpc. This allows for a more flexible hugepage + * pagetable layout. + */ +typedef struct { unsigned long pd; } hugepd_t; +#define is_hugepd(hugepd) (0) +#define __hugepd(x) ((hugepd_t) { (x) }) +static inline int gup_huge_pd(hugepd_t hugepd, unsigned long addr, + unsigned pdshift, unsigned long end, + int write, struct page **pages, int *nr) +{ + return 0; +} +#else +extern int gup_huge_pd(hugepd_t hugepd, unsigned long addr, + unsigned pdshift, unsigned long end, + int write, struct page **pages, int *nr); +#endif #define HUGETLB_ANON_FILE "anon_hugepage" -- cgit v1.2.3 From 6d09dc6b74caaca83e32e67f2454406041d58fb0 Mon Sep 17 00:00:00 2001 From: Hans de Goede Date: Fri, 14 Nov 2014 13:26:52 +0100 Subject: of.h: Keep extern declaration of of_* variables when !CONFIG_OF Keep the extern declaration of of_allnodes and friends, when building without of support, this way code using them can be written like this: if (IS_ENABLED(CONFIG_OF_PLATFORM) && of_chosen) { for_each_child_of_node(of_chosen, np) ... } And rely on the compiler optimizing it away, avoiding the need for #ifdef-ery. Signed-off-by: Hans de Goede Signed-off-by: Tomi Valkeinen --- include/linux/of.h | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/of.h b/include/linux/of.h index 6545e7aec7bb..f83ca9dddcba 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -105,8 +105,6 @@ static inline struct device_node *of_node_get(struct device_node *node) static inline void of_node_put(struct device_node *node) { } #endif /* !CONFIG_OF_DYNAMIC */ -#ifdef CONFIG_OF - /* Pointer for first entry in chain of all nodes. */ extern struct device_node *of_allnodes; extern struct device_node *of_chosen; @@ -114,6 +112,7 @@ extern struct device_node *of_aliases; extern struct device_node *of_stdout; extern raw_spinlock_t devtree_lock; +#ifdef CONFIG_OF static inline bool of_have_populated_dt(void) { return of_allnodes != NULL; -- cgit v1.2.3 From a720b41c41f5a7e4c51558cf087882c57331581f Mon Sep 17 00:00:00 2001 From: Antonios Motakis Date: Mon, 13 Oct 2014 14:06:16 +0100 Subject: iommu/arm-smmu: change IOMMU_EXEC to IOMMU_NOEXEC Exposing the XN flag of the SMMU driver as IOMMU_NOEXEC instead of IOMMU_EXEC makes it enforceable, since for IOMMUs that don't support the XN flag pages will always be executable. Signed-off-by: Antonios Motakis Acked-by: Joerg Roedel Signed-off-by: Will Deacon --- include/linux/iommu.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/iommu.h b/include/linux/iommu.h index e6a7c9ff72f2..f47383a05d34 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -27,7 +27,7 @@ #define IOMMU_READ (1 << 0) #define IOMMU_WRITE (1 << 1) #define IOMMU_CACHE (1 << 2) /* DMA cache coherency */ -#define IOMMU_EXEC (1 << 3) +#define IOMMU_NOEXEC (1 << 3) struct iommu_ops; struct iommu_group; -- cgit v1.2.3 From c49866493b1ffb7c0a7963a1e3c0094e78760184 Mon Sep 17 00:00:00 2001 From: Antonios Motakis Date: Mon, 13 Oct 2014 14:06:17 +0100 Subject: iommu: add capability IOMMU_CAP_NOEXEC Some IOMMUs accept an IOMMU_NOEXEC protection flag in addition to IOMMU_READ and IOMMU_WRITE. Expose this as an IOMMU capability. Signed-off-by: Antonios Motakis Acked-by: Joerg Roedel Signed-off-by: Will Deacon --- include/linux/iommu.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/iommu.h b/include/linux/iommu.h index f47383a05d34..e438b30f062b 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -61,6 +61,7 @@ enum iommu_cap { IOMMU_CAP_CACHE_COHERENCY, /* IOMMU can enforce cache coherent DMA transactions */ IOMMU_CAP_INTR_REMAP, /* IOMMU supports interrupt isolation */ + IOMMU_CAP_NOEXEC, /* IOMMU_NOEXEC flag */ }; /* -- cgit v1.2.3 From a77f9c5dcdf8480a93332792c336fa2bf9d31229 Mon Sep 17 00:00:00 2001 From: Jay Vosburgh Date: Fri, 14 Nov 2014 11:05:06 -0800 Subject: Revert "fast_hash: avoid indirect function calls" This reverts commit e5a2c899957659cd1a9f789bc462f9c0b35f5150. Commit e5a2c899 introduced an alternative_call, arch_fast_hash2, that selects between __jhash2 and __intel_crc4_2_hash based on the X86_FEATURE_XMM4_2. Unfortunately, the alternative_call system does not appear to be suitable for use with C functions, as register usage is not handled properly for the called functions. The __jhash2 function in particular clobbers registers that are not preserved when called via alternative_call, resulting in a panic for direct callers of arch_fast_hash2 on older CPUs lacking sse4_2. It is possible that __intel_crc4_2_hash works merely by chance because it uses fewer registers. This commit was suggested as the source of the problem by Jesse Gross . Signed-off-by: Jay Vosburgh Signed-off-by: David S. Miller --- include/linux/hash.h | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) (limited to 'include/linux') diff --git a/include/linux/hash.h b/include/linux/hash.h index 6e8fb028848c..d0494c399392 100644 --- a/include/linux/hash.h +++ b/include/linux/hash.h @@ -84,4 +84,38 @@ static inline u32 hash32_ptr(const void *ptr) return (u32)val; } +struct fast_hash_ops { + u32 (*hash)(const void *data, u32 len, u32 seed); + u32 (*hash2)(const u32 *data, u32 len, u32 seed); +}; + +/** + * arch_fast_hash - Caclulates a hash over a given buffer that can have + * arbitrary size. This function will eventually use an + * architecture-optimized hashing implementation if + * available, and trades off distribution for speed. + * + * @data: buffer to hash + * @len: length of buffer in bytes + * @seed: start seed + * + * Returns 32bit hash. + */ +extern u32 arch_fast_hash(const void *data, u32 len, u32 seed); + +/** + * arch_fast_hash2 - Caclulates a hash over a given buffer that has a + * size that is of a multiple of 32bit words. This + * function will eventually use an architecture- + * optimized hashing implementation if available, + * and trades off distribution for speed. + * + * @data: buffer to hash (must be 32bit padded) + * @len: number of 32bit words + * @seed: start seed + * + * Returns 32bit hash. + */ +extern u32 arch_fast_hash2(const u32 *data, u32 len, u32 seed); + #endif /* _LINUX_HASH_H */ -- cgit v1.2.3 From acd899e4f3066b6662f6047da5b795cc762093cb Mon Sep 17 00:00:00 2001 From: Jacek Anaszewski Date: Mon, 22 Sep 2014 08:21:04 -0700 Subject: leds: implement sysfs interface locking mechanism Add a mechanism for locking LED subsystem sysfs interface. This patch prepares ground for addition of LED Flash Class extension, whose API will be integrated with V4L2 Flash API. Such a fusion enforces introducing a locking scheme, which will secure consistent access to the LED Flash Class device. The mechanism being introduced allows for disabling LED subsystem sysfs interface by calling led_sysfs_disable function and enabling it by calling led_sysfs_enable. The functions alter the LED_SYSFS_DISABLE flag state and must be called under mutex lock. The state of the lock is checked with use of led_sysfs_is_disabled function. Such a design allows for providing immediate feedback to the user space on whether the LED Flash Class device is available or is under V4L2 Flash sub-device control. Signed-off-by: Jacek Anaszewski Acked-by: Kyungmin Park Cc: Richard Purdie Signed-off-by: Bryan Wu --- include/linux/leds.h | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) (limited to 'include/linux') diff --git a/include/linux/leds.h b/include/linux/leds.h index a57611d0c94e..737f9b1051f2 100644 --- a/include/linux/leds.h +++ b/include/linux/leds.h @@ -13,6 +13,7 @@ #define __LINUX_LEDS_H_INCLUDED #include +#include #include #include #include @@ -42,6 +43,7 @@ struct led_classdev { #define LED_BLINK_ONESHOT (1 << 17) #define LED_BLINK_ONESHOT_STOP (1 << 18) #define LED_BLINK_INVERT (1 << 19) +#define LED_SYSFS_DISABLE (1 << 20) /* Set LED brightness level */ /* Must not sleep, use a workqueue if needed */ @@ -85,6 +87,9 @@ struct led_classdev { /* true if activated - deactivate routine uses it to do cleanup */ bool activated; #endif + + /* Ensures consistent access to the LED Flash Class device */ + struct mutex led_access; }; extern int led_classdev_register(struct device *parent, @@ -151,6 +156,33 @@ extern void led_set_brightness(struct led_classdev *led_cdev, */ extern int led_update_brightness(struct led_classdev *led_cdev); +/** + * led_sysfs_disable - disable LED sysfs interface + * @led_cdev: the LED to set + * + * Disable the led_cdev's sysfs interface. + */ +extern void led_sysfs_disable(struct led_classdev *led_cdev); + +/** + * led_sysfs_enable - enable LED sysfs interface + * @led_cdev: the LED to set + * + * Enable the led_cdev's sysfs interface. + */ +extern void led_sysfs_enable(struct led_classdev *led_cdev); + +/** + * led_sysfs_is_disabled - check if LED sysfs interface is disabled + * @led_cdev: the LED to query + * + * Returns: true if the led_cdev's sysfs interface is disabled. + */ +static inline bool led_sysfs_is_disabled(struct led_classdev *led_cdev) +{ + return led_cdev->flags & LED_SYSFS_DISABLE; +} + /* * LED Triggers */ -- cgit v1.2.3 From 4d71a4a12b130ad033219e6f58c74a64059415eb Mon Sep 17 00:00:00 2001 From: Jacek Anaszewski Date: Fri, 14 Nov 2014 02:50:18 -0800 Subject: leds: Add support for setting brightness in a synchronous way There are use cases when setting a LED brightness has to have immediate effect (e.g. setting a torch LED brightness). This patch extends LED subsystem to support such operations. The LED subsystem internal API __led_set_brightness is changed to led_set_brightness_async and new led_set_brightness_sync API is added. Signed-off-by: Jacek Anaszewski Acked-by: Kyungmin Park Cc: Richard Purdie Signed-off-by: Bryan Wu --- include/linux/leds.h | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'include/linux') diff --git a/include/linux/leds.h b/include/linux/leds.h index 737f9b1051f2..dfe70e928eae 100644 --- a/include/linux/leds.h +++ b/include/linux/leds.h @@ -44,11 +44,19 @@ struct led_classdev { #define LED_BLINK_ONESHOT_STOP (1 << 18) #define LED_BLINK_INVERT (1 << 19) #define LED_SYSFS_DISABLE (1 << 20) +#define SET_BRIGHTNESS_ASYNC (1 << 21) +#define SET_BRIGHTNESS_SYNC (1 << 22) /* Set LED brightness level */ /* Must not sleep, use a workqueue if needed */ void (*brightness_set)(struct led_classdev *led_cdev, enum led_brightness brightness); + /* + * Set LED brightness level immediately - it can block the caller for + * the time required for accessing a LED device register. + */ + int (*brightness_set_sync)(struct led_classdev *led_cdev, + enum led_brightness brightness); /* Get LED brightness level */ enum led_brightness (*brightness_get)(struct led_classdev *led_cdev); -- cgit v1.2.3 From d8b163c4c657478ef33c082cff78d03a4ca07bb2 Mon Sep 17 00:00:00 2001 From: Kirill Tkhai Date: Tue, 11 Nov 2014 12:46:29 +0300 Subject: sched/numa: Init numa balancing fields of init_task We do not initialize init_task.numa_preferred_nid, but this value is inherited by userspace "init" process: rest_init()->kernel_thread(kernel_init)->do_fork(CLONE_VM); __sched_fork() { if (clone_flags & CLONE_VM) p->numa_preferred_nid = current->numa_preferred_nid; else p->numa_preferred_nid = -1; } kernel_init() becomes userspace "init" process. So, we propagate garbage nid to userspace, and it may be used during numa balancing. Currently, we do not have reports about this brings a problem, but it seem we should set it for sure. Even if init_task.numa_preferred_nid is zero, we may meet a weird configuration without nid#0. On sparc64, where processors are numbered physically, I saw a machine without cpu#1, while cpu#2 existed. Possible, something similar may be with numa nodes. So, let's initialize it and be sure we're safe. Signed-off-by: Kirill Tkhai Signed-off-by: Peter Zijlstra (Intel) Cc: Eric Paris Cc: Linus Torvalds Cc: Oleg Nesterov Cc: Paul E. McKenney Cc: Sergey Dyasly Link: http://lkml.kernel.org/r/1415699189.15631.6.camel@tkhai Signed-off-by: Ingo Molnar --- include/linux/init_task.h | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'include/linux') diff --git a/include/linux/init_task.h b/include/linux/init_task.h index 77fc43f8fb72..5f30ac8c82bc 100644 --- a/include/linux/init_task.h +++ b/include/linux/init_task.h @@ -166,6 +166,15 @@ extern struct task_group root_task_group; # define INIT_RT_MUTEXES(tsk) #endif +#ifdef CONFIG_NUMA_BALANCING +# define INIT_NUMA_BALANCING(tsk) \ + .numa_preferred_nid = -1, \ + .numa_group = NULL, \ + .numa_faults = NULL, +#else +# define INIT_NUMA_BALANCING(tsk) +#endif + /* * INIT_TASK is used to set up the first task table, touch at * your own risk!. Base=0, limit=0x1fffff (=2MB) @@ -237,6 +246,7 @@ extern struct task_group root_task_group; INIT_CPUSET_SEQ(tsk) \ INIT_RT_MUTEXES(tsk) \ INIT_VTIME(tsk) \ + INIT_NUMA_BALANCING(tsk) \ } -- cgit v1.2.3 From 60e2364e60e86e81bc6377f49779779e6120977f Mon Sep 17 00:00:00 2001 From: Stephane Eranian Date: Wed, 24 Sep 2014 13:48:37 +0200 Subject: perf: Add ability to sample machine state on interrupt Enable capture of interrupted machine state for each sample. Registers to sample are passed per event in the sample_regs_intr bitmask. To sample interrupt machine state, the PERF_SAMPLE_INTR_REGS must be passed in sample_type. The list of available registers is arch dependent and provided by asm/perf_regs.h Registers are laid out as u64 in the order of the bit order of sample_intr_regs. This patch also adds a new ABI version PERF_ATTR_SIZE_VER4 because we extend the perf_event_attr struct with a new u64 field. Reviewed-by: Jiri Olsa Signed-off-by: Stephane Eranian Signed-off-by: Peter Zijlstra (Intel) Cc: cebbert.lkml@gmail.com Cc: Arnaldo Carvalho de Melo Cc: Linus Torvalds Cc: linux-api@vger.kernel.org Link: http://lkml.kernel.org/r/1411559322-16548-2-git-send-email-eranian@google.com Signed-off-by: Ingo Molnar --- include/linux/perf_event.h | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index 893a0d07986f..68d46d536e24 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -79,7 +79,7 @@ struct perf_branch_stack { struct perf_branch_entry entries[0]; }; -struct perf_regs_user { +struct perf_regs { __u64 abi; struct pt_regs *regs; }; @@ -600,7 +600,8 @@ struct perf_sample_data { struct perf_callchain_entry *callchain; struct perf_raw_record *raw; struct perf_branch_stack *br_stack; - struct perf_regs_user regs_user; + struct perf_regs regs_user; + struct perf_regs regs_intr; u64 stack_user_size; u64 weight; /* @@ -630,6 +631,8 @@ static inline void perf_sample_data_init(struct perf_sample_data *data, data->weight = 0; data->data_src.val = PERF_MEM_NA; data->txn = 0; + data->regs_intr.abi = PERF_SAMPLE_REGS_ABI_NONE; + data->regs_intr.regs = NULL; } extern void perf_output_sample(struct perf_output_handle *handle, -- cgit v1.2.3 From 2565711fb7d7c28e0cd93c8971b520d1b10b857c Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Wed, 24 Sep 2014 13:48:42 +0200 Subject: perf: Improve the perf_sample_data struct layout This patch reorders fields in the perf_sample_data struct in order to minimize the number of cachelines touched in perf_sample_data_init(). It also removes some intializations which are redundant with the code in kernel/events/core.c Signed-off-by: Peter Zijlstra (Intel) Link: http://lkml.kernel.org/r/1411559322-16548-7-git-send-email-eranian@google.com Cc: cebbert.lkml@gmail.com Cc: Arnaldo Carvalho de Melo Cc: jolsa@redhat.com Cc: Linus Torvalds Signed-off-by: Ingo Molnar --- include/linux/perf_event.h | 34 +++++++++++++++++----------------- 1 file changed, 17 insertions(+), 17 deletions(-) (limited to 'include/linux') diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index 68d46d536e24..486e84ccb1f9 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -580,35 +580,40 @@ extern u64 perf_event_read_value(struct perf_event *event, struct perf_sample_data { - u64 type; + /* + * Fields set by perf_sample_data_init(), group so as to + * minimize the cachelines touched. + */ + u64 addr; + struct perf_raw_record *raw; + struct perf_branch_stack *br_stack; + u64 period; + u64 weight; + u64 txn; + union perf_mem_data_src data_src; + /* + * The other fields, optionally {set,used} by + * perf_{prepare,output}_sample(). + */ + u64 type; u64 ip; struct { u32 pid; u32 tid; } tid_entry; u64 time; - u64 addr; u64 id; u64 stream_id; struct { u32 cpu; u32 reserved; } cpu_entry; - u64 period; - union perf_mem_data_src data_src; struct perf_callchain_entry *callchain; - struct perf_raw_record *raw; - struct perf_branch_stack *br_stack; struct perf_regs regs_user; struct perf_regs regs_intr; u64 stack_user_size; - u64 weight; - /* - * Transaction flags for abort events: - */ - u64 txn; -}; +} ____cacheline_aligned; /* default value for data source */ #define PERF_MEM_NA (PERF_MEM_S(OP, NA) |\ @@ -625,14 +630,9 @@ static inline void perf_sample_data_init(struct perf_sample_data *data, data->raw = NULL; data->br_stack = NULL; data->period = period; - data->regs_user.abi = PERF_SAMPLE_REGS_ABI_NONE; - data->regs_user.regs = NULL; - data->stack_user_size = 0; data->weight = 0; data->data_src.val = PERF_MEM_NA; data->txn = 0; - data->regs_intr.abi = PERF_SAMPLE_REGS_ABI_NONE; - data->regs_intr.regs = NULL; } extern void perf_output_sample(struct perf_output_handle *handle, -- cgit v1.2.3 From 960fb622f85180f36d3aff82af53e2be3db2f888 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Sun, 16 Nov 2014 06:23:05 -0800 Subject: net: provide a per host RSS key generic infrastructure RSS (Receive Side Scaling) typically uses Toeplitz hash and a 40 or 52 bytes RSS key. Some drivers use a constant (and well known key), some drivers use a random key per port, making bonding setups hard to tune. Well known keys increase attack surface, considering that number of queues is usually a power of two. This patch provides infrastructure to help drivers doing the right thing. netdev_rss_key_fill() should be used by drivers to initialize their RSS key, even if they provide ethtool -X support to let user redefine the key later. A new /proc/sys/net/core/netdev_rss_key file can be used to get the host RSS key even for drivers not providing ethtool -x support, in case some applications want to precisely setup flows to match some RX queues. Tested: myhost:~# cat /proc/sys/net/core/netdev_rss_key 11:63:99:bb:79:fb:a5:a7:07:45:b2:20:bf:02:42:2d:08:1a:dd:19:2b:6b:23:ac:56:28:9d:70:c3:ac:e8:16:4b:b7:c1:10:53:a4:78:41:36:40:74:b6:15:ca:27:44:aa:b3:4d:72 myhost:~# ethtool -x eth0 RX flow hash indirection table for eth0 with 8 RX ring(s): 0: 0 1 2 3 4 5 6 7 RSS hash key: 11:63:99:bb:79:fb:a5:a7:07:45:b2:20:bf:02:42:2d:08:1a:dd:19:2b:6b:23:ac:56:28:9d:70:c3:ac:e8:16:4b:b7:c1:10:53:a4:78:41 Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller --- include/linux/netdevice.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'include/linux') diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 4a6f770377d3..db63cf459ba1 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -3422,6 +3422,12 @@ void netdev_upper_dev_unlink(struct net_device *dev, void netdev_adjacent_rename_links(struct net_device *dev, char *oldname); void *netdev_lower_dev_get_private(struct net_device *dev, struct net_device *lower_dev); + +/* RSS keys are 40 or 52 bytes long */ +#define NETDEV_RSS_KEY_LEN 52 +extern u8 netdev_rss_key[NETDEV_RSS_KEY_LEN]; +void netdev_rss_key_fill(void *buffer, size_t len); + int dev_get_nest_level(struct net_device *dev, bool (*type_check)(struct net_device *dev)); int skb_checksum_help(struct sk_buff *skb); -- cgit v1.2.3 From b9d1ab7eb42ede51ffbb6cafffd0a521b30c12e1 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Sun, 16 Nov 2014 06:23:16 -0800 Subject: mlx4: use netdev_rss_key_fill() helper Use of well known RSS key increases attack surface. Switch to a random one, using generic helper so that all ports share a common key. Also provide ethtool -x support to fetch RSS key Signed-off-by: Eric Dumazet Cc: Amir Vadai Signed-off-by: David S. Miller --- include/linux/mlx4/qp.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/mlx4/qp.h b/include/linux/mlx4/qp.h index 5f4e36cf0091..467ccdf94c98 100644 --- a/include/linux/mlx4/qp.h +++ b/include/linux/mlx4/qp.h @@ -120,13 +120,15 @@ enum { MLX4_RSS_QPC_FLAG_OFFSET = 13, }; +#define MLX4_EN_RSS_KEY_SIZE 40 + struct mlx4_rss_context { __be32 base_qpn; __be32 default_qpn; u16 reserved; u8 hash_fn; u8 flags; - __be32 rss_key[10]; + __be32 rss_key[MLX4_EN_RSS_KEY_SIZE / sizeof(__be32)]; __be32 base_qpn_udp; }; -- cgit v1.2.3 From 29aebfde8802b64a5b505a1d8a6842c188abfdbc Mon Sep 17 00:00:00 2001 From: Nicolin Chen Date: Fri, 24 Oct 2014 12:37:41 -0700 Subject: dmaengine: imx-sdma: Add a new DMATYPE for SAI This patch simply adds a new DMATYPE for SAI which's included in i.MX6 Solo X. Signed-off-by: Nicolin Chen Acked-by: Shawn Guo Signed-off-by: Vinod Koul --- include/linux/platform_data/dma-imx.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/platform_data/dma-imx.h b/include/linux/platform_data/dma-imx.h index 6a1357d31871..7d964e787299 100644 --- a/include/linux/platform_data/dma-imx.h +++ b/include/linux/platform_data/dma-imx.h @@ -41,6 +41,7 @@ enum sdma_peripheral_type { IMX_DMATYPE_ESAI, /* ESAI */ IMX_DMATYPE_SSI_DUAL, /* SSI Dual FIFO */ IMX_DMATYPE_ASRC_SP, /* Shared ASRC */ + IMX_DMATYPE_SAI, /* SAI */ }; enum imx_dma_prio { -- cgit v1.2.3 From cb41c8dd01d74d091618f72e28f0282f064a9f0a Mon Sep 17 00:00:00 2001 From: Alexander Aring Date: Mon, 17 Nov 2014 08:20:54 +0100 Subject: ieee802154: rename and move WPAN_NUM_ defines This patch moves the 802.15.4 constraints WPAN_NUM_ defines into "net/ieee802154.h" which should contain all necessary 802.15.4 related information. Also rename these defines to a common name which is IEEE802154_MAX_CHANNEL and IEEE802154_MAX_PAGE. Signed-off-by: Alexander Aring Signed-off-by: Marcel Holtmann --- include/linux/ieee802154.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/linux') diff --git a/include/linux/ieee802154.h b/include/linux/ieee802154.h index 5a40c0418438..6e82d888287c 100644 --- a/include/linux/ieee802154.h +++ b/include/linux/ieee802154.h @@ -39,6 +39,9 @@ #define IEEE802154_LIFS_PERIOD 40 #define IEEE802154_SIFS_PERIOD 12 +#define IEEE802154_MAX_CHANNEL 26 +#define IEEE802154_MAX_PAGE 31 + #define IEEE802154_FC_TYPE_BEACON 0x0 /* Frame is beacon */ #define IEEE802154_FC_TYPE_DATA 0x1 /* Frame is data */ #define IEEE802154_FC_TYPE_ACK 0x2 /* Frame is acknowledgment */ -- cgit v1.2.3 From 48b6bca6b7b8309697fc8a101793befe92d249d9 Mon Sep 17 00:00:00 2001 From: Benjamin Marzinski Date: Thu, 13 Nov 2014 20:42:03 -0600 Subject: fs: add freeze_super/thaw_super fs hooks Currently, freezing a filesystem involves calling freeze_super, which locks sb->s_umount and then calls the fs-specific freeze_fs hook. This makes it hard for gfs2 (and potentially other cluster filesystems) to use the vfs freezing code to do freezes on all the cluster nodes. In order to communicate that a freeze has been requested, and to make sure that only one node is trying to freeze at a time, gfs2 uses a glock (sd_freeze_gl). The problem is that there is no hook for gfs2 to acquire this lock before calling freeze_super. This means that two nodes can attempt to freeze the filesystem by both calling freeze_super, acquiring the sb->s_umount lock, and then attempting to grab the cluster glock sd_freeze_gl. Only one will succeed, and the other will be stuck in freeze_super, making it impossible to finish freezing the node. To solve this problem, this patch adds the freeze_super and thaw_super hooks. If a filesystem implements these hooks, they are called instead of the vfs freeze_super and thaw_super functions. This means that every filesystem that implements these hooks must call the vfs freeze_super and thaw_super functions itself within the hook function to make use of the vfs freezing code. Reviewed-by: Jan Kara Signed-off-by: Benjamin Marzinski Signed-off-by: Steven Whitehouse --- include/linux/fs.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/linux') diff --git a/include/linux/fs.h b/include/linux/fs.h index 9ab779e8a63c..b4a1d73c0d5d 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1577,7 +1577,9 @@ struct super_operations { void (*evict_inode) (struct inode *); void (*put_super) (struct super_block *); int (*sync_fs)(struct super_block *sb, int wait); + int (*freeze_super) (struct super_block *); int (*freeze_fs) (struct super_block *); + int (*thaw_super) (struct super_block *); int (*unfreeze_fs) (struct super_block *); int (*statfs) (struct dentry *, struct kstatfs *); int (*remount_fs) (struct super_block *, int *, char *); -- cgit v1.2.3 From 7c7f2f2bc9a63f9605a16eabac59fc655dfe7c9a Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Mon, 17 Nov 2014 10:41:57 -0700 Subject: blk-mq: add blk_mq_free_hctx_request() It's silly to use blk_mq_free_request() which in turn maps the request to the hardware queue, for places where we already know what the hardware queue is. This saves us an extra mapping of a hardware queue on request completion, if the caller knows this information already. Signed-off-by: Jens Axboe --- include/linux/blk-mq.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h index c3b64ec5321e..fb0a4fb3dc2b 100644 --- a/include/linux/blk-mq.h +++ b/include/linux/blk-mq.h @@ -169,6 +169,7 @@ void blk_mq_flush_plug_list(struct blk_plug *plug, bool from_schedule); void blk_mq_insert_request(struct request *, bool, bool, bool); void blk_mq_run_queues(struct request_queue *q, bool async); void blk_mq_free_request(struct request *rq); +void blk_mq_free_hctx_request(struct blk_mq_hw_ctx *, struct request *rq); bool blk_mq_can_queue(struct blk_mq_hw_ctx *); struct request *blk_mq_alloc_request(struct request_queue *q, int rw, gfp_t gfp, bool reserved); -- cgit v1.2.3 From 069fb0b63722f8c9f8b4bbce236793626c89af33 Mon Sep 17 00:00:00 2001 From: Sebastian Schmidt Date: Fri, 14 Nov 2014 10:51:45 -0800 Subject: syslog: Provide stub check_syslog_permissions When building without CONFIG_PRINTK, we need to provide a stub check_syslog_permissions. As there is no way to turn on the dmesg_restrict sysctl without CONFIG_PRINTK, return success. Reported-by: Jim Davis Signed-off-by: Sebastian Schmidt Acked-by: Kees Cook Signed-off-by: Tony Luck --- include/linux/syslog.h | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'include/linux') diff --git a/include/linux/syslog.h b/include/linux/syslog.h index 9def5297dbb7..4b7b875a7ce1 100644 --- a/include/linux/syslog.h +++ b/include/linux/syslog.h @@ -48,6 +48,14 @@ #define SYSLOG_FROM_PROC 1 int do_syslog(int type, char __user *buf, int count, bool from_file); + +#ifdef CONFIG_PRINTK int check_syslog_permissions(int type, bool from_file); +#else +static inline int check_syslog_permissions(int type, bool from_file) +{ + return 0; +} +#endif #endif /* _LINUX_SYSLOG_H */ -- cgit v1.2.3 From 3fb1581ea1ab0aec6ac5430dc0e257a8c9b71680 Mon Sep 17 00:00:00 2001 From: Krzysztof Kozlowski Date: Fri, 14 Nov 2014 09:47:25 +0100 Subject: ARM: 8199/1: PM / Runtime: Add getter for querying the IRQ safe option v12 Add a simple getter pm_runtime_is_irq_safe() for querying whether runtime PM IRQ safe was set or not. Various bus drivers implementing runtime PM may use choose to suspend differently based on IRQ safeness status of child driver (e.g. do not unprepare the clock if IRQ safe is not set). Signed-off-by: Krzysztof Kozlowski Reviewed-by: Ulf Hansson Acked-by: Rafael J. Wysocki Signed-off-by: Russell King --- include/linux/pm_runtime.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'include/linux') diff --git a/include/linux/pm_runtime.h b/include/linux/pm_runtime.h index 367f49b9a1c9..44d74f0f182e 100644 --- a/include/linux/pm_runtime.h +++ b/include/linux/pm_runtime.h @@ -128,6 +128,11 @@ static inline void pm_runtime_mark_last_busy(struct device *dev) ACCESS_ONCE(dev->power.last_busy) = jiffies; } +static inline bool pm_runtime_is_irq_safe(struct device *dev) +{ + return dev->power.irq_safe; +} + #else /* !CONFIG_PM_RUNTIME */ static inline int __pm_runtime_idle(struct device *dev, int rpmflags) @@ -167,6 +172,7 @@ static inline bool pm_runtime_enabled(struct device *dev) { return false; } static inline void pm_runtime_no_callbacks(struct device *dev) {} static inline void pm_runtime_irq_safe(struct device *dev) {} +static inline bool pm_runtime_is_irq_safe(struct device *dev) { return false; } static inline bool pm_runtime_callbacks_present(struct device *dev) { return false; } static inline void pm_runtime_mark_last_busy(struct device *dev) {} -- cgit v1.2.3 From f560e3229564a673603541ebfb36118d7cd98038 Mon Sep 17 00:00:00 2001 From: Krzysztof Kozlowski Date: Fri, 14 Nov 2014 09:47:49 +0100 Subject: ARM: 8200/1: amba: Add helpers for (un)preparing AMBA clock v12 Add amba_pclk_prepare() and amba_pclk_unprepare() inline functions for handling the AMBA bus clock by device drivers. Signed-off-by: Krzysztof Kozlowski Reviewed-by: Ulf Hansson Signed-off-by: Russell King --- include/linux/amba/bus.h | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'include/linux') diff --git a/include/linux/amba/bus.h b/include/linux/amba/bus.h index c324f5700d1a..ac02f9bd63dc 100644 --- a/include/linux/amba/bus.h +++ b/include/linux/amba/bus.h @@ -97,6 +97,16 @@ void amba_release_regions(struct amba_device *); #define amba_pclk_disable(d) \ do { if (!IS_ERR((d)->pclk)) clk_disable((d)->pclk); } while (0) +static inline int amba_pclk_prepare(struct amba_device *dev) +{ + return clk_prepare(dev->pclk); +} + +static inline void amba_pclk_unprepare(struct amba_device *dev) +{ + clk_unprepare(dev->pclk); +} + /* Some drivers don't use the struct amba_device */ #define AMBA_CONFIG_BITS(a) (((a) >> 24) & 0xff) #define AMBA_REV_BITS(a) (((a) >> 20) & 0x0f) -- cgit v1.2.3 From 4aae7e436fa51faf4bf5d11b175aea82cfe8224a Mon Sep 17 00:00:00 2001 From: Qiaowei Ren Date: Fri, 14 Nov 2014 07:18:25 -0800 Subject: x86, mpx: Introduce VM_MPX to indicate that a VMA is MPX specific MPX-enabled applications using large swaths of memory can potentially have large numbers of bounds tables in process address space to save bounds information. These tables can take up huge swaths of memory (as much as 80% of the memory on the system) even if we clean them up aggressively. In the worst-case scenario, the tables can be 4x the size of the data structure being tracked. IOW, a 1-page structure can require 4 bounds-table pages. Being this huge, our expectation is that folks using MPX are going to be keen on figuring out how much memory is being dedicated to it. So we need a way to track memory use for MPX. If we want to specifically track MPX VMAs we need to be able to distinguish them from normal VMAs, and keep them from getting merged with normal VMAs. A new VM_ flag set only on MPX VMAs does both of those things. With this flag, MPX bounds-table VMAs can be distinguished from other VMAs, and userspace can also walk /proc/$pid/smaps to get memory usage for MPX. In addition to this flag, we also introduce a special ->vm_ops specific to MPX VMAs (see the patch "add MPX specific mmap interface"), but currently different ->vm_ops do not by themselves prevent VMA merging, so we still need this flag. We understand that VM_ flags are scarce and are open to other options. Signed-off-by: Qiaowei Ren Signed-off-by: Dave Hansen Cc: linux-mm@kvack.org Cc: linux-mips@linux-mips.org Cc: Dave Hansen Link: http://lkml.kernel.org/r/20141114151825.565625B3@viggo.jf.intel.com Signed-off-by: Thomas Gleixner --- include/linux/mm.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'include/linux') diff --git a/include/linux/mm.h b/include/linux/mm.h index b46461116cd2..f7606d3a0915 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -128,6 +128,7 @@ extern unsigned int kobjsize(const void *objp); #define VM_HUGETLB 0x00400000 /* Huge TLB Page VM */ #define VM_NONLINEAR 0x00800000 /* Is non-linear (remap_file_pages) */ #define VM_ARCH_1 0x01000000 /* Architecture-specific flag */ +#define VM_ARCH_2 0x02000000 #define VM_DONTDUMP 0x04000000 /* Do not include in the core dump */ #ifdef CONFIG_MEM_SOFT_DIRTY @@ -155,6 +156,11 @@ extern unsigned int kobjsize(const void *objp); # define VM_MAPPED_COPY VM_ARCH_1 /* T if mapped copy of data (nommu mmap) */ #endif +#if defined(CONFIG_X86) +/* MPX specific bounds table or bounds directory */ +# define VM_MPX VM_ARCH_2 +#endif + #ifndef VM_GROWSUP # define VM_GROWSUP VM_NONE #endif -- cgit v1.2.3 From fe3d197f84319d3bce379a9c0dc17b1f48ad358c Mon Sep 17 00:00:00 2001 From: Dave Hansen Date: Fri, 14 Nov 2014 07:18:29 -0800 Subject: x86, mpx: On-demand kernel allocation of bounds tables This is really the meat of the MPX patch set. If there is one patch to review in the entire series, this is the one. There is a new ABI here and this kernel code also interacts with userspace memory in a relatively unusual manner. (small FAQ below). Long Description: This patch adds two prctl() commands to provide enable or disable the management of bounds tables in kernel, including on-demand kernel allocation (See the patch "on-demand kernel allocation of bounds tables") and cleanup (See the patch "cleanup unused bound tables"). Applications do not strictly need the kernel to manage bounds tables and we expect some applications to use MPX without taking advantage of this kernel support. This means the kernel can not simply infer whether an application needs bounds table management from the MPX registers. The prctl() is an explicit signal from userspace. PR_MPX_ENABLE_MANAGEMENT is meant to be a signal from userspace to require kernel's help in managing bounds tables. PR_MPX_DISABLE_MANAGEMENT is the opposite, meaning that userspace don't want kernel's help any more. With PR_MPX_DISABLE_MANAGEMENT, the kernel won't allocate and free bounds tables even if the CPU supports MPX. PR_MPX_ENABLE_MANAGEMENT will fetch the base address of the bounds directory out of a userspace register (bndcfgu) and then cache it into a new field (->bd_addr) in the 'mm_struct'. PR_MPX_DISABLE_MANAGEMENT will set "bd_addr" to an invalid address. Using this scheme, we can use "bd_addr" to determine whether the management of bounds tables in kernel is enabled. Also, the only way to access that bndcfgu register is via an xsaves, which can be expensive. Caching "bd_addr" like this also helps reduce the cost of those xsaves when doing table cleanup at munmap() time. Unfortunately, we can not apply this optimization to #BR fault time because we need an xsave to get the value of BNDSTATUS. ==== Why does the hardware even have these Bounds Tables? ==== MPX only has 4 hardware registers for storing bounds information. If MPX-enabled code needs more than these 4 registers, it needs to spill them somewhere. It has two special instructions for this which allow the bounds to be moved between the bounds registers and some new "bounds tables". They are similar conceptually to a page fault and will be raised by the MPX hardware during both bounds violations or when the tables are not present. This patch handles those #BR exceptions for not-present tables by carving the space out of the normal processes address space (essentially calling the new mmap() interface indroduced earlier in this patch set.) and then pointing the bounds-directory over to it. The tables *need* to be accessed and controlled by userspace because the instructions for moving bounds in and out of them are extremely frequent. They potentially happen every time a register pointing to memory is dereferenced. Any direct kernel involvement (like a syscall) to access the tables would obviously destroy performance. ==== Why not do this in userspace? ==== This patch is obviously doing this allocation in the kernel. However, MPX does not strictly *require* anything in the kernel. It can theoretically be done completely from userspace. Here are a few ways this *could* be done. I don't think any of them are practical in the real-world, but here they are. Q: Can virtual space simply be reserved for the bounds tables so that we never have to allocate them? A: As noted earlier, these tables are *HUGE*. An X-GB virtual area needs 4*X GB of virtual space, plus 2GB for the bounds directory. If we were to preallocate them for the 128TB of user virtual address space, we would need to reserve 512TB+2GB, which is larger than the entire virtual address space today. This means they can not be reserved ahead of time. Also, a single process's pre-popualated bounds directory consumes 2GB of virtual *AND* physical memory. IOW, it's completely infeasible to prepopulate bounds directories. Q: Can we preallocate bounds table space at the same time memory is allocated which might contain pointers that might eventually need bounds tables? A: This would work if we could hook the site of each and every memory allocation syscall. This can be done for small, constrained applications. But, it isn't practical at a larger scale since a given app has no way of controlling how all the parts of the app might allocate memory (think libraries). The kernel is really the only place to intercept these calls. Q: Could a bounds fault be handed to userspace and the tables allocated there in a signal handler instead of in the kernel? A: (thanks to tglx) mmap() is not on the list of safe async handler functions and even if mmap() would work it still requires locking or nasty tricks to keep track of the allocation state there. Having ruled out all of the userspace-only approaches for managing bounds tables that we could think of, we create them on demand in the kernel. Based-on-patch-by: Qiaowei Ren Signed-off-by: Dave Hansen Cc: linux-mm@kvack.org Cc: linux-mips@linux-mips.org Cc: Dave Hansen Link: http://lkml.kernel.org/r/20141114151829.AD4310DE@viggo.jf.intel.com Signed-off-by: Thomas Gleixner --- include/linux/mm_types.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include/linux') diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index 6e0b286649f1..004e9d17b47e 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -454,6 +454,10 @@ struct mm_struct { bool tlb_flush_pending; #endif struct uprobes_state uprobes_state; +#ifdef CONFIG_X86_INTEL_MPX + /* address of the bounds directory */ + void __user *bd_addr; +#endif }; static inline void mm_init_cpumask(struct mm_struct *mm) -- cgit v1.2.3 From 00e7c295968d74f4dbb00aef8334fafe788e3c89 Mon Sep 17 00:00:00 2001 From: Ulf Hansson Date: Fri, 14 Nov 2014 08:41:32 +0100 Subject: PM / Domains: Move struct pm_domain_data to pm_domain.h The definition of the struct pm_domain_data better belongs in the header for the PM domains, let's move it there. Signed-off-by: Ulf Hansson Signed-off-by: Rafael J. Wysocki --- include/linux/pm.h | 6 +----- include/linux/pm_domain.h | 5 +++++ 2 files changed, 6 insertions(+), 5 deletions(-) (limited to 'include/linux') diff --git a/include/linux/pm.h b/include/linux/pm.h index 383fd68aaee1..45e3e78c1e3a 100644 --- a/include/linux/pm.h +++ b/include/linux/pm.h @@ -538,11 +538,7 @@ enum rpm_request { }; struct wakeup_source; - -struct pm_domain_data { - struct list_head list_node; - struct device *dev; -}; +struct pm_domain_data; struct pm_subsys_data { spinlock_t lock; diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h index 73e938b7e937..86689b59ce5b 100644 --- a/include/linux/pm_domain.h +++ b/include/linux/pm_domain.h @@ -98,6 +98,11 @@ struct gpd_timing_data { bool cached_stop_ok; }; +struct pm_domain_data { + struct list_head list_node; + struct device *dev; +}; + struct generic_pm_domain_data { struct pm_domain_data base; struct gpd_timing_data td; -- cgit v1.2.3 From c9cd2ce2bc6313aafa33f8e28d29a8690252f219 Mon Sep 17 00:00:00 2001 From: Dmitry Kasatkin Date: Wed, 5 Nov 2014 17:01:15 +0200 Subject: integrity: provide a hook to load keys when rootfs is ready Keys can only be loaded once the rootfs is mounted. Initcalls are not suitable for that. This patch defines a special hook to load the x509 public keys onto the IMA keyring, before attempting to access any file. The keys are required for verifying the file's signature. The hook is called after the root filesystem is mounted and before the kernel calls 'init'. Changes in v3: * added more explanation to the patch description (Mimi) Changes in v2: * Hook renamed as 'integrity_load_keys()' to handle both IMA and EVM keys by integrity subsystem. * Hook patch moved after defining loading functions Signed-off-by: Dmitry Kasatkin Signed-off-by: Mimi Zohar --- include/linux/integrity.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'include/linux') diff --git a/include/linux/integrity.h b/include/linux/integrity.h index 83222cebd47b..c2d6082a1a4c 100644 --- a/include/linux/integrity.h +++ b/include/linux/integrity.h @@ -24,6 +24,7 @@ enum integrity_status { #ifdef CONFIG_INTEGRITY extern struct integrity_iint_cache *integrity_inode_get(struct inode *inode); extern void integrity_inode_free(struct inode *inode); +extern void __init integrity_load_keys(void); #else static inline struct integrity_iint_cache * @@ -36,5 +37,10 @@ static inline void integrity_inode_free(struct inode *inode) { return; } + +static inline void integrity_load_keys(void) +{ +} #endif /* CONFIG_INTEGRITY */ + #endif /* _LINUX_INTEGRITY_H */ -- cgit v1.2.3 From 6fb5032ebb1c5b852461d64ee33829081de8ca61 Mon Sep 17 00:00:00 2001 From: Dmitry Kasatkin Date: Wed, 5 Nov 2014 17:01:17 +0200 Subject: VFS: refactor vfs_read() integrity_kernel_read() duplicates the file read operations code in vfs_read(). This patch refactors vfs_read() code creating a helper function __vfs_read(). It is used by both vfs_read() and integrity_kernel_read(). Signed-off-by: Dmitry Kasatkin Signed-off-by: Mimi Zohar --- include/linux/fs.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/fs.h b/include/linux/fs.h index e11d60cc867b..ac3a36e05da9 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1527,6 +1527,7 @@ ssize_t rw_copy_check_uvector(int type, const struct iovec __user * uvector, struct iovec *fast_pointer, struct iovec **ret_pointer); +extern ssize_t __vfs_read(struct file *, char __user *, size_t, loff_t *); extern ssize_t vfs_read(struct file *, char __user *, size_t, loff_t *); extern ssize_t vfs_write(struct file *, const char __user *, size_t, loff_t *); extern ssize_t vfs_readv(struct file *, const struct iovec __user *, -- cgit v1.2.3 From 7d172cc89b8589e4173d0c73a1ddaae408f29c9d Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Tue, 18 Nov 2014 02:49:51 -0500 Subject: cgroup: add cgroup_subsys->css_released() Add a new cgroup subsys callback css_released(). This is called when the reference count of the css (cgroup_subsys_state) reaches zero before RCU scheduling free. Signed-off-by: Tejun Heo Acked-by: Zefan Li --- include/linux/cgroup.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h index 1d5196889048..e717a39f22ea 100644 --- a/include/linux/cgroup.h +++ b/include/linux/cgroup.h @@ -612,6 +612,7 @@ struct cgroup_subsys { struct cgroup_subsys_state *(*css_alloc)(struct cgroup_subsys_state *parent_css); int (*css_online)(struct cgroup_subsys_state *css); void (*css_offline)(struct cgroup_subsys_state *css); + void (*css_released)(struct cgroup_subsys_state *css); void (*css_free)(struct cgroup_subsys_state *css); void (*css_reset)(struct cgroup_subsys_state *css); -- cgit v1.2.3 From 56c807ba4e91f0980567b6a69de239677879b17f Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Tue, 18 Nov 2014 02:49:51 -0500 Subject: cgroup: add cgroup_subsys->css_e_css_changed() Add a new cgroup_subsys operatoin ->css_e_css_changed(). This is invoked if any of the effective csses seen from the css's cgroup may have changed. This will be used to implement cgroup writeback support. Signed-off-by: Tejun Heo Acked-by: Zefan Li --- include/linux/cgroup.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h index e717a39f22ea..3a04aeb8b5a1 100644 --- a/include/linux/cgroup.h +++ b/include/linux/cgroup.h @@ -615,6 +615,7 @@ struct cgroup_subsys { void (*css_released)(struct cgroup_subsys_state *css); void (*css_free)(struct cgroup_subsys_state *css); void (*css_reset)(struct cgroup_subsys_state *css); + void (*css_e_css_changed)(struct cgroup_subsys_state *css); int (*can_attach)(struct cgroup_subsys_state *css, struct cgroup_taskset *tset); -- cgit v1.2.3 From eeecbd1971517103e06f11750dd1a9a1dc37e4e6 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Tue, 18 Nov 2014 02:49:52 -0500 Subject: cgroup: implement cgroup_get_e_css() Implement cgroup_get_e_css() which finds and gets the effective css for the specified cgroup and subsystem combination. This function always returns a valid pinned css. This will be used by cgroup writeback support. While at it, add comment to cgroup_e_css() to explain why that function is different from cgroup_get_e_css() and has to test cgrp->child_subsys_mask instead of cgroup_css(cgrp, ss). Signed-off-by: Tejun Heo Acked-by: Zefan Li --- include/linux/cgroup.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/linux') diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h index 3a04aeb8b5a1..9fd99f5e699f 100644 --- a/include/linux/cgroup.h +++ b/include/linux/cgroup.h @@ -910,6 +910,8 @@ void css_task_iter_end(struct css_task_iter *it); int cgroup_attach_task_all(struct task_struct *from, struct task_struct *); int cgroup_transfer_tasks(struct cgroup *to, struct cgroup *from); +struct cgroup_subsys_state *cgroup_get_e_css(struct cgroup *cgroup, + struct cgroup_subsys *ss); struct cgroup_subsys_state *css_tryget_online_from_dir(struct dentry *dentry, struct cgroup_subsys *ss); -- cgit v1.2.3 From c2a0b538d2c778aef7bf2fbe7973229192c9a392 Mon Sep 17 00:00:00 2001 From: Jiang Liu Date: Sun, 9 Nov 2014 22:47:56 +0800 Subject: iommu/vt-d: Introduce helper function dmar_walk_resources() Introduce helper function dmar_walk_resources to walk resource entries in DMAR table and ACPI buffer object returned by ACPI _DSM method for IOMMU hot-plug. Signed-off-by: Jiang Liu Signed-off-by: Joerg Roedel --- include/linux/dmar.h | 19 +++++++++---------- 1 file changed, 9 insertions(+), 10 deletions(-) (limited to 'include/linux') diff --git a/include/linux/dmar.h b/include/linux/dmar.h index 593fff99e6bf..495df5e48f80 100644 --- a/include/linux/dmar.h +++ b/include/linux/dmar.h @@ -121,22 +121,21 @@ extern int dmar_remove_dev_scope(struct dmar_pci_notify_info *info, extern int detect_intel_iommu(void); extern int enable_drhd_fault_handling(void); +static inline int dmar_res_noop(struct acpi_dmar_header *hdr, void *arg) +{ + return 0; +} + #ifdef CONFIG_INTEL_IOMMU extern int iommu_detected, no_iommu; extern int intel_iommu_init(void); -extern int dmar_parse_one_rmrr(struct acpi_dmar_header *header); -extern int dmar_parse_one_atsr(struct acpi_dmar_header *header); +extern int dmar_parse_one_rmrr(struct acpi_dmar_header *header, void *arg); +extern int dmar_parse_one_atsr(struct acpi_dmar_header *header, void *arg); extern int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info); #else /* !CONFIG_INTEL_IOMMU: */ static inline int intel_iommu_init(void) { return -ENODEV; } -static inline int dmar_parse_one_rmrr(struct acpi_dmar_header *header) -{ - return 0; -} -static inline int dmar_parse_one_atsr(struct acpi_dmar_header *header) -{ - return 0; -} +#define dmar_parse_one_rmrr dmar_res_noop +#define dmar_parse_one_atsr dmar_res_noop static inline int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info) { return 0; -- cgit v1.2.3 From 78d8e7046111425bb688cddc4303d79cb0f0d281 Mon Sep 17 00:00:00 2001 From: Jiang Liu Date: Sun, 9 Nov 2014 22:47:57 +0800 Subject: iommu/vt-d: Dynamically allocate and free seq_id for DMAR units Introduce functions to support dynamic IOMMU seq_id allocating and releasing, which will be used to support DMAR hotplug. Also rename IOMMU_UNITS_SUPPORTED as DMAR_UNITS_SUPPORTED. Signed-off-by: Jiang Liu Reviewed-by: Yijing Wang Signed-off-by: Joerg Roedel --- include/linux/dmar.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'include/linux') diff --git a/include/linux/dmar.h b/include/linux/dmar.h index 495df5e48f80..725204fc433e 100644 --- a/include/linux/dmar.h +++ b/include/linux/dmar.h @@ -30,6 +30,12 @@ struct acpi_dmar_header; +#ifdef CONFIG_X86 +# define DMAR_UNITS_SUPPORTED MAX_IO_APICS +#else +# define DMAR_UNITS_SUPPORTED 64 +#endif + /* DMAR Flags */ #define DMAR_INTR_REMAP 0x1 #define DMAR_X2APIC_OPT_OUT 0x2 -- cgit v1.2.3 From 6b1972493a84f8fe13ff9d202745590f6c53d670 Mon Sep 17 00:00:00 2001 From: Jiang Liu Date: Sun, 9 Nov 2014 22:47:58 +0800 Subject: iommu/vt-d: Implement DMAR unit hotplug framework On Intel platforms, an IO Hub (PCI/PCIe host bridge) may contain DMAR units, so we need to support DMAR hotplug when supporting PCI host bridge hotplug on Intel platforms. According to Section 8.8 "Remapping Hardware Unit Hot Plug" in "Intel Virtualization Technology for Directed IO Architecture Specification Rev 2.2", ACPI BIOS should implement ACPI _DSM method under the ACPI object for the PCI host bridge to support DMAR hotplug. This patch introduces interfaces to parse ACPI _DSM method for DMAR unit hotplug. It also implements state machines for DMAR unit hot-addition and hot-removal. The PCI host bridge hotplug driver should call dmar_hotplug_hotplug() before scanning PCI devices connected for hot-addition and after destroying all PCI devices for hot-removal. Signed-off-by: Jiang Liu Reviewed-by: Yijing Wang Signed-off-by: Joerg Roedel --- include/linux/dmar.h | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) (limited to 'include/linux') diff --git a/include/linux/dmar.h b/include/linux/dmar.h index 725204fc433e..30624954dec5 100644 --- a/include/linux/dmar.h +++ b/include/linux/dmar.h @@ -126,6 +126,8 @@ extern int dmar_remove_dev_scope(struct dmar_pci_notify_info *info, /* Intel IOMMU detection */ extern int detect_intel_iommu(void); extern int enable_drhd_fault_handling(void); +extern int dmar_device_add(acpi_handle handle); +extern int dmar_device_remove(acpi_handle handle); static inline int dmar_res_noop(struct acpi_dmar_header *hdr, void *arg) { @@ -137,17 +139,48 @@ extern int iommu_detected, no_iommu; extern int intel_iommu_init(void); extern int dmar_parse_one_rmrr(struct acpi_dmar_header *header, void *arg); extern int dmar_parse_one_atsr(struct acpi_dmar_header *header, void *arg); +extern int dmar_check_one_atsr(struct acpi_dmar_header *hdr, void *arg); +extern int dmar_release_one_atsr(struct acpi_dmar_header *hdr, void *arg); +extern int dmar_iommu_hotplug(struct dmar_drhd_unit *dmaru, bool insert); extern int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info); #else /* !CONFIG_INTEL_IOMMU: */ static inline int intel_iommu_init(void) { return -ENODEV; } + #define dmar_parse_one_rmrr dmar_res_noop #define dmar_parse_one_atsr dmar_res_noop +#define dmar_check_one_atsr dmar_res_noop +#define dmar_release_one_atsr dmar_res_noop + static inline int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info) { return 0; } + +static inline int dmar_iommu_hotplug(struct dmar_drhd_unit *dmaru, bool insert) +{ + return 0; +} #endif /* CONFIG_INTEL_IOMMU */ +#ifdef CONFIG_IRQ_REMAP +extern int dmar_ir_hotplug(struct dmar_drhd_unit *dmaru, bool insert); +#else /* CONFIG_IRQ_REMAP */ +static inline int dmar_ir_hotplug(struct dmar_drhd_unit *dmaru, bool insert) +{ return 0; } +#endif /* CONFIG_IRQ_REMAP */ + +#else /* CONFIG_DMAR_TABLE */ + +static inline int dmar_device_add(void *handle) +{ + return 0; +} + +static inline int dmar_device_remove(void *handle) +{ + return 0; +} + #endif /* CONFIG_DMAR_TABLE */ struct irte { -- cgit v1.2.3 From 53a4ab96c61a34d62717b1481f6043e0b4338d74 Mon Sep 17 00:00:00 2001 From: Kevin Cernekee Date: Wed, 12 Nov 2014 12:54:01 -0800 Subject: of: Change of_device_is_available() to return bool This function can only return true or false; using a bool makes it more obvious to the reader. Signed-off-by: Kevin Cernekee Signed-off-by: Grant Likely --- include/linux/of.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'include/linux') diff --git a/include/linux/of.h b/include/linux/of.h index 3c851a8f23eb..27635c89d8c2 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -276,7 +276,7 @@ extern int of_property_read_string_helper(struct device_node *np, const char **out_strs, size_t sz, int index); extern int of_device_is_compatible(const struct device_node *device, const char *); -extern int of_device_is_available(const struct device_node *device); +extern bool of_device_is_available(const struct device_node *device); extern const void *of_get_property(const struct device_node *node, const char *name, int *lenp); @@ -427,9 +427,9 @@ static inline int of_device_is_compatible(const struct device_node *device, return 0; } -static inline int of_device_is_available(const struct device_node *device) +static inline bool of_device_is_available(const struct device_node *device) { - return 0; + return false; } static inline struct property *of_find_property(const struct device_node *np, -- cgit v1.2.3 From 3274f52073d88b62f3c5ace82ae9d48546232e72 Mon Sep 17 00:00:00 2001 From: Alexei Starovoitov Date: Thu, 13 Nov 2014 17:36:44 -0800 Subject: bpf: add 'flags' attribute to BPF_MAP_UPDATE_ELEM command the current meaning of BPF_MAP_UPDATE_ELEM syscall command is: either update existing map element or create a new one. Initially the plan was to add a new command to handle the case of 'create new element if it didn't exist', but 'flags' style looks cleaner and overall diff is much smaller (more code reused), so add 'flags' attribute to BPF_MAP_UPDATE_ELEM command with the following meaning: #define BPF_ANY 0 /* create new element or update existing */ #define BPF_NOEXIST 1 /* create new element if it didn't exist */ #define BPF_EXIST 2 /* update existing element */ bpf_update_elem(fd, key, value, BPF_NOEXIST) call can fail with EEXIST if element already exists. bpf_update_elem(fd, key, value, BPF_EXIST) can fail with ENOENT if element doesn't exist. Userspace will call it as: int bpf_update_elem(int fd, void *key, void *value, __u64 flags) { union bpf_attr attr = { .map_fd = fd, .key = ptr_to_u64(key), .value = ptr_to_u64(value), .flags = flags; }; return bpf(BPF_MAP_UPDATE_ELEM, &attr, sizeof(attr)); } First two bits of 'flags' are used to encode style of bpf_update_elem() command. Bits 2-63 are reserved for future use. Signed-off-by: Alexei Starovoitov Signed-off-by: David S. Miller --- include/linux/bpf.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/bpf.h b/include/linux/bpf.h index 3cf91754a957..51e9242e4803 100644 --- a/include/linux/bpf.h +++ b/include/linux/bpf.h @@ -22,7 +22,7 @@ struct bpf_map_ops { /* funcs callable from userspace and from eBPF programs */ void *(*map_lookup_elem)(struct bpf_map *map, void *key); - int (*map_update_elem)(struct bpf_map *map, void *key, void *value); + int (*map_update_elem)(struct bpf_map *map, void *key, void *value, u64 flags); int (*map_delete_elem)(struct bpf_map *map, void *key); }; -- cgit v1.2.3 From d0003ec01c667b731c139e23de3306a8b328ccf5 Mon Sep 17 00:00:00 2001 From: Alexei Starovoitov Date: Thu, 13 Nov 2014 17:36:49 -0800 Subject: bpf: allow eBPF programs to use maps expose bpf_map_lookup_elem(), bpf_map_update_elem(), bpf_map_delete_elem() map accessors to eBPF programs Signed-off-by: Alexei Starovoitov Signed-off-by: David S. Miller --- include/linux/bpf.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include/linux') diff --git a/include/linux/bpf.h b/include/linux/bpf.h index 51e9242e4803..75e94eaa228b 100644 --- a/include/linux/bpf.h +++ b/include/linux/bpf.h @@ -133,4 +133,9 @@ struct bpf_prog *bpf_prog_get(u32 ufd); /* verify correctness of eBPF program */ int bpf_check(struct bpf_prog *fp, union bpf_attr *attr); +/* verifier prototypes for helper functions called from eBPF programs */ +extern struct bpf_func_proto bpf_map_lookup_elem_proto; +extern struct bpf_func_proto bpf_map_update_elem_proto; +extern struct bpf_func_proto bpf_map_delete_elem_proto; + #endif /* _LINUX_BPF_H */ -- cgit v1.2.3 From 1277b4a9f531e84e26f9e0210c1801b0c0bf81ca Mon Sep 17 00:00:00 2001 From: Liad Kaufman Date: Sun, 9 Nov 2014 18:50:08 +0200 Subject: mac80211: retransmit TDLS teardown packet through AP if not ACKed Since the TDLS peer station might not receive the teardown packet (e.g., when in PS), this makes sure the packet is retransmitted - this time through the AP - if the TDLS peer didn't ACK the packet. Signed-off-by: Liad Kaufman Signed-off-by: Arik Nemtsov Signed-off-by: Johannes Berg --- include/linux/ieee80211.h | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) (limited to 'include/linux') diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h index f65b5446d983..4e2bb9107878 100644 --- a/include/linux/ieee80211.h +++ b/include/linux/ieee80211.h @@ -19,6 +19,7 @@ #include #include #include +#include /* * DS bit usage @@ -2418,6 +2419,30 @@ static inline bool ieee80211_check_tim(const struct ieee80211_tim_ie *tim, return !!(tim->virtual_map[index] & mask); } +/** + * ieee80211_get_tdls_action - get tdls packet action (or -1, if not tdls packet) + * @skb: the skb containing the frame, length will not be checked + * @hdr_size: the size of the ieee80211_hdr that starts at skb->data + * + * This function assumes the frame is a data frame, and that the network header + * is in the correct place. + */ +static inline int ieee80211_get_tdls_action(struct sk_buff *skb, u32 hdr_size) +{ + if (!skb_is_nonlinear(skb) && + skb->len > (skb_network_offset(skb) + 2)) { + /* Point to where the indication of TDLS should start */ + const u8 *tdls_data = skb_network_header(skb) - 2; + + if (get_unaligned_be16(tdls_data) == ETH_P_TDLS && + tdls_data[2] == WLAN_TDLS_SNAP_RFTYPE && + tdls_data[3] == WLAN_CATEGORY_TDLS) + return tdls_data[4]; + } + + return -1; +} + /* convert time units */ #define TU_TO_JIFFIES(x) (usecs_to_jiffies((x) * 1024)) #define TU_TO_EXP_TIME(x) (jiffies + TU_TO_JIFFIES(x)) -- cgit v1.2.3 From 2cedd87960a809dd9bf683f72123b7dce6736f07 Mon Sep 17 00:00:00 2001 From: Arik Nemtsov Date: Sun, 9 Nov 2014 18:50:13 +0200 Subject: mac80211: add BSS coex IE to TDLS setup frames Add the BSS coex IE in case we support HT40 channels, as mandated by section 8.5.13 in IEEE802.11 2012. Signed-off-by: Arik Nemtsov Signed-off-by: Arik Nemtsov Signed-off-by: Johannes Berg --- include/linux/ieee80211.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/linux') diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h index 4e2bb9107878..adac1be67387 100644 --- a/include/linux/ieee80211.h +++ b/include/linux/ieee80211.h @@ -2037,6 +2037,9 @@ enum ieee80211_tdls_actioncode { /* TDLS specific payload type in the LLC/SNAP header */ #define WLAN_TDLS_SNAP_RFTYPE 0x2 +/* BSS Coex IE information field bits */ +#define WLAN_BSS_COEX_INFORMATION_REQUEST BIT(0) + /** * enum - mesh synchronization method identifier * -- cgit v1.2.3 From 78632a17eaa7a5abdc22aac8ca5932d6cad59984 Mon Sep 17 00:00:00 2001 From: Arik Nemtsov Date: Sun, 9 Nov 2014 18:50:14 +0200 Subject: cfg/mac80211: define TDLS channel switch feature bit Define some related TDLS protocol constants and advertise channel switch support in the extended-capabilities IE when the feature bit is defined. Actually supporting TDLS channel-switching also requires support for some new nl80211 commands, to be introduced by future patches. Signed-off-by: Arik Nemtsov Signed-off-by: Arik Nemtsov Signed-off-by: Johannes Berg --- include/linux/ieee80211.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'include/linux') diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h index adac1be67387..fbb02d240658 100644 --- a/include/linux/ieee80211.h +++ b/include/linux/ieee80211.h @@ -2019,6 +2019,11 @@ enum ieee80211_tdls_actioncode { */ #define WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING BIT(2) +/* TDLS capabilities in the the 4th byte of @WLAN_EID_EXT_CAPABILITY */ +#define WLAN_EXT_CAPA4_TDLS_BUFFER_STA BIT(4) +#define WLAN_EXT_CAPA4_TDLS_PEER_PSM BIT(5) +#define WLAN_EXT_CAPA4_TDLS_CHAN_SWITCH BIT(6) + /* Interworking capabilities are set in 7th bit of 4th byte of the * @WLAN_EID_EXT_CAPABILITY information element */ @@ -2030,6 +2035,7 @@ enum ieee80211_tdls_actioncode { */ #define WLAN_EXT_CAPA5_TDLS_ENABLED BIT(5) #define WLAN_EXT_CAPA5_TDLS_PROHIBITED BIT(6) +#define WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED BIT(7) #define WLAN_EXT_CAPA8_OPMODE_NOTIF BIT(6) #define WLAN_EXT_CAPA8_TDLS_WIDE_BW_ENABLED BIT(7) -- cgit v1.2.3 From 53837584438f8899e061ada4663ae1d09b49b96a Mon Sep 17 00:00:00 2001 From: Arik Nemtsov Date: Sun, 9 Nov 2014 18:50:18 +0200 Subject: mac80211: add parsing of TDLS specific IEs These are used in TDLS channel switching code. Signed-off-by: Arik Nemtsov Signed-off-by: Arik Nemtsov Signed-off-by: Johannes Berg --- include/linux/ieee80211.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'include/linux') diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h index fbb02d240658..4f4eea8a6288 100644 --- a/include/linux/ieee80211.h +++ b/include/linux/ieee80211.h @@ -1067,6 +1067,12 @@ struct ieee80211_pspoll { /* TDLS */ +/* Channel switch timing */ +struct ieee80211_ch_switch_timing { + __le16 switch_time; + __le16 switch_timeout; +} __packed; + /* Link-id information element */ struct ieee80211_tdls_lnkie { u8 ie_type; /* Link Identifier IE */ @@ -1108,6 +1114,15 @@ struct ieee80211_tdls_data { u8 dialog_token; u8 variable[0]; } __packed discover_req; + struct { + u8 target_channel; + u8 oper_class; + u8 variable[0]; + } __packed chan_switch_req; + struct { + __le16 status_code; + u8 variable[0]; + } __packed chan_switch_resp; } u; } __packed; -- cgit v1.2.3 From b5ae6b15bd73e35b129408755a0804287a87e041 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sun, 12 Oct 2014 22:16:02 -0400 Subject: merge d_materialise_unique() into d_splice_alias() Signed-off-by: Al Viro --- include/linux/dcache.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/dcache.h b/include/linux/dcache.h index 1c2f1b84468b..ee569da27b72 100644 --- a/include/linux/dcache.h +++ b/include/linux/dcache.h @@ -230,7 +230,7 @@ extern seqlock_t rename_lock; */ extern void d_instantiate(struct dentry *, struct inode *); extern struct dentry * d_instantiate_unique(struct dentry *, struct inode *); -extern struct dentry * d_materialise_unique(struct dentry *, struct inode *); +#define d_materialise_unique(d, i) d_splice_alias(i, d) extern int d_instantiate_no_diralias(struct dentry *, struct inode *); extern void __d_drop(struct dentry *dentry); extern void d_drop(struct dentry *dentry); -- cgit v1.2.3 From 41d28bca2da4bd75a8915c1ccf2cacf7f4a2e531 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sun, 12 Oct 2014 22:24:21 -0400 Subject: switch d_materialise_unique() users to d_splice_alias() Signed-off-by: Al Viro --- include/linux/dcache.h | 1 - 1 file changed, 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/dcache.h b/include/linux/dcache.h index ee569da27b72..5a813988e6d4 100644 --- a/include/linux/dcache.h +++ b/include/linux/dcache.h @@ -230,7 +230,6 @@ extern seqlock_t rename_lock; */ extern void d_instantiate(struct dentry *, struct inode *); extern struct dentry * d_instantiate_unique(struct dentry *, struct inode *); -#define d_materialise_unique(d, i) d_splice_alias(i, d) extern int d_instantiate_no_diralias(struct dentry *, struct inode *); extern void __d_drop(struct dentry *dentry); extern void d_drop(struct dentry *dentry); -- cgit v1.2.3 From b583043e99bc6d91e98fae32bd9eff6a5958240a Mon Sep 17 00:00:00 2001 From: Al Viro Date: Fri, 31 Oct 2014 01:22:04 -0400 Subject: kill f_dentry uses Signed-off-by: Al Viro --- include/linux/cgroup.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h index 1d5196889048..27b0c9105da5 100644 --- a/include/linux/cgroup.h +++ b/include/linux/cgroup.h @@ -367,8 +367,8 @@ struct css_set { * struct cftype: handler definitions for cgroup control files * * When reading/writing to a file: - * - the cgroup to use is file->f_dentry->d_parent->d_fsdata - * - the 'cftype' of the file is file->f_dentry->d_fsdata + * - the cgroup to use is file->f_path.dentry->d_parent->d_fsdata + * - the 'cftype' of the file is file->f_path.dentry->d_fsdata */ /* cftype->flags */ -- cgit v1.2.3 From 9f45f5bf302daad6835ce64701fb3c286a2cc6af Mon Sep 17 00:00:00 2001 From: Al Viro Date: Fri, 31 Oct 2014 17:44:57 -0400 Subject: new helper: audit_file() ... for situations when we don't have any candidate in pathnames - basically, in descriptor-based syscalls. [Folded the build fix for !CONFIG_AUDITSYSCALL configs from Chen Gang] Signed-off-by: Al Viro --- include/linux/audit.h | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'include/linux') diff --git a/include/linux/audit.h b/include/linux/audit.h index e58fe7df8b9c..0c04917c2f12 100644 --- a/include/linux/audit.h +++ b/include/linux/audit.h @@ -130,6 +130,7 @@ extern void audit_putname(struct filename *name); #define AUDIT_INODE_HIDDEN 2 /* audit record should be hidden */ extern void __audit_inode(struct filename *name, const struct dentry *dentry, unsigned int flags); +extern void __audit_file(const struct file *); extern void __audit_inode_child(const struct inode *parent, const struct dentry *dentry, const unsigned char type); @@ -183,6 +184,11 @@ static inline void audit_inode(struct filename *name, __audit_inode(name, dentry, flags); } } +static inline void audit_file(struct file *file) +{ + if (unlikely(!audit_dummy_context())) + __audit_file(file); +} static inline void audit_inode_parent_hidden(struct filename *name, const struct dentry *dentry) { @@ -357,6 +363,9 @@ static inline void audit_inode(struct filename *name, const struct dentry *dentry, unsigned int parent) { } +static inline void audit_file(struct file *file) +{ +} static inline void audit_inode_parent_hidden(struct filename *name, const struct dentry *dentry) { } -- cgit v1.2.3 From 78d28e651f97866d608d9b41f8ad291e65d47dd5 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Fri, 31 Oct 2014 01:22:04 -0400 Subject: kill f_dentry macro Signed-off-by: Al Viro --- include/linux/fs.h | 1 - 1 file changed, 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/fs.h b/include/linux/fs.h index 1c12c681803f..1a8bb3c023a1 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -789,7 +789,6 @@ struct file { struct rcu_head fu_rcuhead; } f_u; struct path f_path; -#define f_dentry f_path.dentry struct inode *f_inode; /* cached value */ const struct file_operations *f_op; -- cgit v1.2.3 From aec0be2d6e9f02dbef41ee54854c2e003e55c23e Mon Sep 17 00:00:00 2001 From: "Steven Rostedt (Red Hat)" Date: Tue, 18 Nov 2014 21:14:11 -0500 Subject: ftrace/x86/extable: Add is_ftrace_trampoline() function Stack traces that happen from function tracing check if the address on the stack is a __kernel_text_address(). That is, is the address kernel code. This calls core_kernel_text() which returns true if the address is part of the builtin kernel code. It also calls is_module_text_address() which returns true if the address belongs to module code. But what is missing is ftrace dynamically allocated trampolines. These trampolines are allocated for individual ftrace_ops that call the ftrace_ops callback functions directly. But if they do a stack trace, the code checking the stack wont detect them as they are neither core kernel code nor module address space. Adding another field to ftrace_ops that also stores the size of the trampoline assigned to it we can create a new function called is_ftrace_trampoline() that returns true if the address is a dynamically allocate ftrace trampoline. Note, it ignores trampolines that are not dynamically allocated as they will return true with the core_kernel_text() function. Link: http://lkml.kernel.org/r/20141119034829.497125839@goodmis.org Cc: Ingo Molnar Cc: "H. Peter Anvin" Acked-by: Thomas Gleixner Signed-off-by: Steven Rostedt --- include/linux/ftrace.h | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'include/linux') diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h index 619e37cc17fd..7b2616fa2472 100644 --- a/include/linux/ftrace.h +++ b/include/linux/ftrace.h @@ -150,6 +150,7 @@ struct ftrace_ops { struct ftrace_ops_hash *func_hash; struct ftrace_ops_hash old_hash; unsigned long trampoline; + unsigned long trampoline_size; #endif }; @@ -297,6 +298,8 @@ extern int ftrace_text_reserved(const void *start, const void *end); extern int ftrace_nr_registered_ops(void); +bool is_ftrace_trampoline(unsigned long addr); + /* * The dyn_ftrace record's flags field is split into two parts. * the first part which is '0-FTRACE_REF_MAX' is a counter of @@ -596,6 +599,11 @@ static inline ssize_t ftrace_notrace_write(struct file *file, const char __user size_t cnt, loff_t *ppos) { return -ENODEV; } static inline int ftrace_regex_release(struct inode *inode, struct file *file) { return -ENODEV; } + +static inline bool is_ftrace_trampoline(unsigned long addr) +{ + return false; +} #endif /* CONFIG_DYNAMIC_FTRACE */ /* totally disable ftrace - can not re-enable after this */ -- cgit v1.2.3 From 19a7fe206232cc875a3083211e0a21c08edd756e Mon Sep 17 00:00:00 2001 From: "Steven Rostedt (Red Hat)" Date: Wed, 12 Nov 2014 10:29:54 -0500 Subject: tracing: Add trace_seq_has_overflowed() and trace_handle_return() Adding a trace_seq_has_overflowed() which returns true if the trace_seq had too much written into it allows us to simplify the code. Instead of checking the return value of every call to trace_seq_printf() and friends, they can all be called normally, and at the end we can return !trace_seq_has_overflowed() instead. Several functions also return TRACE_TYPE_PARTIAL_LINE when the trace_seq overflowed and TRACE_TYPE_HANDLED otherwise. Another helper function was created called trace_handle_return() which takes a trace_seq and returns these enums. Using this helper function also simplifies the code. This change also makes it possible to remove the return values of trace_seq_printf() and friends. They should instead just be void functions. Link: http://lkml.kernel.org/r/20141114011410.365183157@goodmis.org Reviewed-by: Petr Mladek Signed-off-by: Steven Rostedt --- include/linux/ftrace_event.h | 11 +++++++++++ include/linux/trace_seq.h | 12 ++++++++++++ 2 files changed, 23 insertions(+) (limited to 'include/linux') diff --git a/include/linux/ftrace_event.h b/include/linux/ftrace_event.h index 28672e87e910..0bebb5c348b8 100644 --- a/include/linux/ftrace_event.h +++ b/include/linux/ftrace_event.h @@ -138,6 +138,17 @@ enum print_line_t { TRACE_TYPE_NO_CONSUME = 3 /* Handled but ask to not consume */ }; +/* + * Several functions return TRACE_TYPE_PARTIAL_LINE if the trace_seq + * overflowed, and TRACE_TYPE_HANDLED otherwise. This helper function + * simplifies those functions and keeps them in sync. + */ +static inline enum print_line_t trace_handle_return(struct trace_seq *s) +{ + return trace_seq_has_overflowed(s) ? + TRACE_TYPE_PARTIAL_LINE : TRACE_TYPE_HANDLED; +} + void tracing_generic_entry_update(struct trace_entry *entry, unsigned long flags, int pc); diff --git a/include/linux/trace_seq.h b/include/linux/trace_seq.h index ea6c9dea79e3..07eda413dfcf 100644 --- a/include/linux/trace_seq.h +++ b/include/linux/trace_seq.h @@ -40,6 +40,18 @@ trace_seq_buffer_ptr(struct trace_seq *s) return s->buffer + s->len; } +/** + * trace_seq_has_overflowed - return true if the trace_seq took too much + * @s: trace sequence descriptor + * + * Returns true if too much data was added to the trace_seq and it is + * now full and will not take anymore. + */ +static inline bool trace_seq_has_overflowed(struct trace_seq *s) +{ + return s->full || s->len > PAGE_SIZE - 1; +} + /* * Currently only defined when tracing is enabled. */ -- cgit v1.2.3 From dba39448abb7340f86ae9b062f99d7acacb5d2d2 Mon Sep 17 00:00:00 2001 From: "Steven Rostedt (Red Hat)" Date: Wed, 12 Nov 2014 18:07:22 -0500 Subject: tracing: Remove return values of most trace_seq_*() functions The trace_seq_printf() and friends are used to store strings into a buffer that can be passed around from function to function. If the trace_seq buffer fills up, it will not print any more. The return values were somewhat inconsistant and using trace_seq_has_overflowed() was a better way to know if the write to the trace_seq buffer succeeded or not. Now that all users have removed reading the return value of the printf() type functions, they can safely return void and keep future users of them from reading the inconsistent values as well. Link: http://lkml.kernel.org/r/20141114011411.992510720@goodmis.org Signed-off-by: Steven Rostedt --- include/linux/trace_seq.h | 37 +++++++++++++++---------------------- 1 file changed, 15 insertions(+), 22 deletions(-) (limited to 'include/linux') diff --git a/include/linux/trace_seq.h b/include/linux/trace_seq.h index 07eda413dfcf..db8a73224f1a 100644 --- a/include/linux/trace_seq.h +++ b/include/linux/trace_seq.h @@ -57,40 +57,37 @@ static inline bool trace_seq_has_overflowed(struct trace_seq *s) */ #ifdef CONFIG_TRACING extern __printf(2, 3) -int trace_seq_printf(struct trace_seq *s, const char *fmt, ...); +void trace_seq_printf(struct trace_seq *s, const char *fmt, ...); extern __printf(2, 0) -int trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args); -extern int +void trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args); +extern void trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary); extern int trace_print_seq(struct seq_file *m, struct trace_seq *s); extern int trace_seq_to_user(struct trace_seq *s, char __user *ubuf, int cnt); -extern int trace_seq_puts(struct trace_seq *s, const char *str); -extern int trace_seq_putc(struct trace_seq *s, unsigned char c); -extern int trace_seq_putmem(struct trace_seq *s, const void *mem, unsigned int len); -extern int trace_seq_putmem_hex(struct trace_seq *s, const void *mem, +extern void trace_seq_puts(struct trace_seq *s, const char *str); +extern void trace_seq_putc(struct trace_seq *s, unsigned char c); +extern void trace_seq_putmem(struct trace_seq *s, const void *mem, unsigned int len); +extern void trace_seq_putmem_hex(struct trace_seq *s, const void *mem, unsigned int len); extern int trace_seq_path(struct trace_seq *s, const struct path *path); -extern int trace_seq_bitmask(struct trace_seq *s, const unsigned long *maskp, +extern void trace_seq_bitmask(struct trace_seq *s, const unsigned long *maskp, int nmaskbits); #else /* CONFIG_TRACING */ -static inline int trace_seq_printf(struct trace_seq *s, const char *fmt, ...) +static inline void trace_seq_printf(struct trace_seq *s, const char *fmt, ...) { - return 0; } -static inline int +static inline void trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary) { - return 0; } -static inline int +static inline void trace_seq_bitmask(struct trace_seq *s, const unsigned long *maskp, int nmaskbits) { - return 0; } static inline int trace_print_seq(struct seq_file *m, struct trace_seq *s) @@ -102,23 +99,19 @@ static inline int trace_seq_to_user(struct trace_seq *s, char __user *ubuf, { return 0; } -static inline int trace_seq_puts(struct trace_seq *s, const char *str) +static inline void trace_seq_puts(struct trace_seq *s, const char *str) { - return 0; } -static inline int trace_seq_putc(struct trace_seq *s, unsigned char c) +static inline void trace_seq_putc(struct trace_seq *s, unsigned char c) { - return 0; } -static inline int +static inline void trace_seq_putmem(struct trace_seq *s, const void *mem, unsigned int len) { - return 0; } -static inline int trace_seq_putmem_hex(struct trace_seq *s, const void *mem, +static inline void trace_seq_putmem_hex(struct trace_seq *s, const void *mem, unsigned int len) { - return 0; } static inline int trace_seq_path(struct trace_seq *s, const struct path *path) { -- cgit v1.2.3 From 666547ff591cebdedc4679bf6b1b3f3383a8dea3 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sun, 6 Apr 2014 14:03:05 -0400 Subject: separate kernel- and userland-side msghdr Kernel-side struct msghdr is (currently) using the same layout as userland one, but it's not a one-to-one copy - even without considering 32bit compat issues, we have msg_iov, msg_name and msg_control copied to kernel[1]. It's fairly localized, so we get away with a few functions where that knowledge is needed (and we could shrink that set even more). Pretty much everything deals with the kernel-side variant and the few places that want userland one just use a bunch of force-casts to paper over the differences. The thing is, kernel-side definition of struct msghdr is *not* exposed in include/uapi - libc doesn't see it, etc. So we can add struct user_msghdr, with proper annotations and let the few places that ever deal with those beasts use it for userland pointers. Saner typechecking aside, that will allow to change the layout of kernel-side msghdr - e.g. replace msg_iov/msg_iovlen there with struct iov_iter, getting rid of the need to modify the iovec as we copy data to/from it, etc. We could introduce kernel_msghdr instead, but that would create much more noise - the absolute majority of the instances would need to have the type switched to kernel_msghdr and definition of struct msghdr in include/linux/socket.h is not going to be seen by userland anyway. This commit just introduces user_msghdr and switches the few places that are dealing with userland-side msghdr to it. [1] actually, it's even trickier than that - we copy msg_control for sendmsg, but keep the userland address on recvmsg. Signed-off-by: Al Viro --- include/linux/socket.h | 16 +++++++++++++--- include/linux/syscalls.h | 6 +++--- 2 files changed, 16 insertions(+), 6 deletions(-) (limited to 'include/linux') diff --git a/include/linux/socket.h b/include/linux/socket.h index bb9b83640070..51bd6668b80e 100644 --- a/include/linux/socket.h +++ b/include/linux/socket.h @@ -53,10 +53,20 @@ struct msghdr { __kernel_size_t msg_controllen; /* ancillary data buffer length */ unsigned int msg_flags; /* flags on received message */ }; + +struct user_msghdr { + void __user *msg_name; /* ptr to socket address structure */ + int msg_namelen; /* size of socket address structure */ + struct iovec __user *msg_iov; /* scatter/gather array */ + __kernel_size_t msg_iovlen; /* # elements in msg_iov */ + void __user *msg_control; /* ancillary data */ + __kernel_size_t msg_controllen; /* ancillary data buffer length */ + unsigned int msg_flags; /* flags on received message */ +}; /* For recvmmsg/sendmmsg */ struct mmsghdr { - struct msghdr msg_hdr; + struct user_msghdr msg_hdr; unsigned int msg_len; }; @@ -319,8 +329,8 @@ extern int put_cmsg(struct msghdr*, int level, int type, int len, void *data); struct timespec; /* The __sys_...msg variants allow MSG_CMSG_COMPAT */ -extern long __sys_recvmsg(int fd, struct msghdr __user *msg, unsigned flags); -extern long __sys_sendmsg(int fd, struct msghdr __user *msg, unsigned flags); +extern long __sys_recvmsg(int fd, struct user_msghdr __user *msg, unsigned flags); +extern long __sys_sendmsg(int fd, struct user_msghdr __user *msg, unsigned flags); extern int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, unsigned int flags, struct timespec *timeout); extern int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h index bda9b81357cc..c9afdc7a7f84 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -25,7 +25,7 @@ struct linux_dirent64; struct list_head; struct mmap_arg_struct; struct msgbuf; -struct msghdr; +struct user_msghdr; struct mmsghdr; struct msqid_ds; struct new_utsname; @@ -601,13 +601,13 @@ asmlinkage long sys_getpeername(int, struct sockaddr __user *, int __user *); asmlinkage long sys_send(int, void __user *, size_t, unsigned); asmlinkage long sys_sendto(int, void __user *, size_t, unsigned, struct sockaddr __user *, int); -asmlinkage long sys_sendmsg(int fd, struct msghdr __user *msg, unsigned flags); +asmlinkage long sys_sendmsg(int fd, struct user_msghdr __user *msg, unsigned flags); asmlinkage long sys_sendmmsg(int fd, struct mmsghdr __user *msg, unsigned int vlen, unsigned flags); asmlinkage long sys_recv(int, void __user *, size_t, unsigned); asmlinkage long sys_recvfrom(int, void __user *, size_t, unsigned, struct sockaddr __user *, int __user *); -asmlinkage long sys_recvmsg(int fd, struct msghdr __user *msg, unsigned flags); +asmlinkage long sys_recvmsg(int fd, struct user_msghdr __user *msg, unsigned flags); asmlinkage long sys_recvmmsg(int fd, struct mmsghdr __user *msg, unsigned int vlen, unsigned flags, struct timespec __user *timeout); -- cgit v1.2.3 From 08adb7dabd4874cc5666b4490653b26534702ce0 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Mon, 10 Nov 2014 20:23:13 -0500 Subject: fold verify_iovec() into copy_msghdr_from_user() ... and do the same on the compat side of things. Signed-off-by: Al Viro --- include/linux/socket.h | 1 - 1 file changed, 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/socket.h b/include/linux/socket.h index 51bd6668b80e..de5222832be4 100644 --- a/include/linux/socket.h +++ b/include/linux/socket.h @@ -322,7 +322,6 @@ extern int csum_partial_copy_fromiovecend(unsigned char *kdata, extern unsigned long iov_pages(const struct iovec *iov, int offset, unsigned long nr_segs); -extern int verify_iovec(struct msghdr *m, struct iovec *iov, struct sockaddr_storage *address, int mode); extern int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr_storage *kaddr); extern int put_cmsg(struct msghdr*, int level, int type, int len, void *data); -- cgit v1.2.3 From 3a161d99c43ce74c76aecff309be4c3ba455e823 Mon Sep 17 00:00:00 2001 From: "Steven Rostedt (Red Hat)" Date: Wed, 25 Jun 2014 15:54:42 -0400 Subject: tracing: Create seq_buf layer in trace_seq Create a seq_buf layer that trace_seq sits on. The seq_buf will not be limited to page size. This will allow other usages of seq_buf instead of a hard set PAGE_SIZE one that trace_seq has. Link: http://lkml.kernel.org/r/20141104160221.864997179@goodmis.org Link: http://lkml.kernel.org/r/20141114011412.170377300@goodmis.org Tested-by: Jiri Kosina Acked-by: Jiri Kosina Reviewed-by: Petr Mladek Signed-off-by: Steven Rostedt --- include/linux/seq_buf.h | 81 +++++++++++++++++++++++++++++++++++++++++++++++ include/linux/trace_seq.h | 12 +++---- 2 files changed, 86 insertions(+), 7 deletions(-) create mode 100644 include/linux/seq_buf.h (limited to 'include/linux') diff --git a/include/linux/seq_buf.h b/include/linux/seq_buf.h new file mode 100644 index 000000000000..4f7a96a9d71a --- /dev/null +++ b/include/linux/seq_buf.h @@ -0,0 +1,81 @@ +#ifndef _LINUX_SEQ_BUF_H +#define _LINUX_SEQ_BUF_H + +#include + +/* + * Trace sequences are used to allow a function to call several other functions + * to create a string of data to use. + */ + +/** + * seq_buf - seq buffer structure + * @buffer: pointer to the buffer + * @size: size of the buffer + * @len: the amount of data inside the buffer + * @readpos: The next position to read in the buffer. + */ +struct seq_buf { + unsigned char *buffer; + unsigned int size; + unsigned int len; + unsigned int readpos; +}; + +static inline void +seq_buf_init(struct seq_buf *s, unsigned char *buf, unsigned int size) +{ + s->buffer = buf; + s->size = size; + s->len = 0; + s->readpos = 0; +} + +/* + * seq_buf have a buffer that might overflow. When this happens + * the len and size are set to be equal. + */ +static inline bool +seq_buf_has_overflowed(struct seq_buf *s) +{ + return s->len == s->size; +} + +static inline void +seq_buf_set_overflow(struct seq_buf *s) +{ + s->len = s->size; +} + +/* + * How much buffer is left on the seq_buf? + */ +static inline unsigned int +seq_buf_buffer_left(struct seq_buf *s) +{ + if (seq_buf_has_overflowed(s)) + return 0; + + return (s->size - 1) - s->len; +} + +extern __printf(2, 3) +int seq_buf_printf(struct seq_buf *s, const char *fmt, ...); +extern __printf(2, 0) +int seq_buf_vprintf(struct seq_buf *s, const char *fmt, va_list args); +extern int +seq_buf_bprintf(struct seq_buf *s, const char *fmt, const u32 *binary); +extern int seq_buf_print_seq(struct seq_file *m, struct seq_buf *s); +extern int seq_buf_to_user(struct seq_buf *s, char __user *ubuf, + int cnt); +extern int seq_buf_puts(struct seq_buf *s, const char *str); +extern int seq_buf_putc(struct seq_buf *s, unsigned char c); +extern int seq_buf_putmem(struct seq_buf *s, const void *mem, unsigned int len); +extern int seq_buf_putmem_hex(struct seq_buf *s, const void *mem, + unsigned int len); +extern int seq_buf_path(struct seq_buf *s, const struct path *path); + +extern int seq_buf_bitmask(struct seq_buf *s, const unsigned long *maskp, + int nmaskbits); + +#endif /* _LINUX_SEQ_BUF_H */ diff --git a/include/linux/trace_seq.h b/include/linux/trace_seq.h index db8a73224f1a..85d37106be3d 100644 --- a/include/linux/trace_seq.h +++ b/include/linux/trace_seq.h @@ -1,7 +1,7 @@ #ifndef _LINUX_TRACE_SEQ_H #define _LINUX_TRACE_SEQ_H -#include +#include #include @@ -12,16 +12,14 @@ struct trace_seq { unsigned char buffer[PAGE_SIZE]; - unsigned int len; - unsigned int readpos; + struct seq_buf seq; int full; }; static inline void trace_seq_init(struct trace_seq *s) { - s->len = 0; - s->readpos = 0; + seq_buf_init(&s->seq, s->buffer, PAGE_SIZE); s->full = 0; } @@ -37,7 +35,7 @@ trace_seq_init(struct trace_seq *s) static inline unsigned char * trace_seq_buffer_ptr(struct trace_seq *s) { - return s->buffer + s->len; + return s->buffer + s->seq.len; } /** @@ -49,7 +47,7 @@ trace_seq_buffer_ptr(struct trace_seq *s) */ static inline bool trace_seq_has_overflowed(struct trace_seq *s) { - return s->full || s->len > PAGE_SIZE - 1; + return s->full || seq_buf_has_overflowed(&s->seq); } /* -- cgit v1.2.3 From dd23180aacf4b27d48f40b27249f1e58c8df03be Mon Sep 17 00:00:00 2001 From: "Steven Rostedt (Red Hat)" Date: Wed, 29 Oct 2014 13:48:37 -0400 Subject: tracing: Convert seq_buf_path() to be like seq_path() Rewrite seq_buf_path() like it is done in seq_path() and allow it to accept any escape character instead of just "\n". Making seq_buf_path() like seq_path() will help prevent problems when converting seq_file to use the seq_buf logic. Link: http://lkml.kernel.org/r/20141104160222.048795666@goodmis.org Link: http://lkml.kernel.org/r/20141114011412.338523371@goodmis.org Tested-by: Jiri Kosina Acked-by: Jiri Kosina Reviewed-by: Petr Mladek Signed-off-by: Steven Rostedt --- include/linux/seq_buf.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/seq_buf.h b/include/linux/seq_buf.h index 4f7a96a9d71a..38770688a627 100644 --- a/include/linux/seq_buf.h +++ b/include/linux/seq_buf.h @@ -73,7 +73,7 @@ extern int seq_buf_putc(struct seq_buf *s, unsigned char c); extern int seq_buf_putmem(struct seq_buf *s, const void *mem, unsigned int len); extern int seq_buf_putmem_hex(struct seq_buf *s, const void *mem, unsigned int len); -extern int seq_buf_path(struct seq_buf *s, const struct path *path); +extern int seq_buf_path(struct seq_buf *s, const struct path *path, const char *esc); extern int seq_buf_bitmask(struct seq_buf *s, const unsigned long *maskp, int nmaskbits); -- cgit v1.2.3 From 9a7777935c34b9192e28ef3d232a4b6b5414a657 Mon Sep 17 00:00:00 2001 From: "Steven Rostedt (Red Hat)" Date: Wed, 29 Oct 2014 13:59:58 -0400 Subject: tracing: Convert seq_buf fields to be like seq_file fields In facilitating the conversion of seq_file to use seq_buf, have the seq_buf fields match the types used by seq_file. Link: http://lkml.kernel.org/r/20141104160222.195301024@goodmis.org Tested-by: Jiri Kosina Acked-by: Jiri Kosina Reviewed-by: Petr Mladek Signed-off-by: Steven Rostedt --- include/linux/seq_buf.h | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'include/linux') diff --git a/include/linux/seq_buf.h b/include/linux/seq_buf.h index 38770688a627..d14dc9023dde 100644 --- a/include/linux/seq_buf.h +++ b/include/linux/seq_buf.h @@ -16,10 +16,10 @@ * @readpos: The next position to read in the buffer. */ struct seq_buf { - unsigned char *buffer; - unsigned int size; - unsigned int len; - unsigned int readpos; + char *buffer; + size_t size; + size_t len; + loff_t readpos; }; static inline void -- cgit v1.2.3 From 0736c033a81547b1cdc5120fc8dd60e26a00fd28 Mon Sep 17 00:00:00 2001 From: "Steven Rostedt (Red Hat)" Date: Wed, 29 Oct 2014 14:17:52 -0400 Subject: tracing: Add a seq_buf_clear() helper and clear len and readpos in init Add a helper function seq_buf_clear() that resets the len and readpos fields of a seq_buf. Currently it is only used in the seq_buf_init() but will be used later when updating the seq_file code. Link: http://lkml.kernel.org/r/20141104160222.352309995@goodmis.org Tested-by: Jiri Kosina Acked-by: Jiri Kosina Reviewed-by: Petr Mladek Signed-off-by: Steven Rostedt --- include/linux/seq_buf.h | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/seq_buf.h b/include/linux/seq_buf.h index d14dc9023dde..5d91262433e2 100644 --- a/include/linux/seq_buf.h +++ b/include/linux/seq_buf.h @@ -22,13 +22,18 @@ struct seq_buf { loff_t readpos; }; +static inline void seq_buf_clear(struct seq_buf *s) +{ + s->len = 0; + s->readpos = 0; +} + static inline void seq_buf_init(struct seq_buf *s, unsigned char *buf, unsigned int size) { s->buffer = buf; s->size = size; - s->len = 0; - s->readpos = 0; + seq_buf_clear(s); } /* -- cgit v1.2.3 From eeab98154dc0b49afd398afdd71c464a8af5911f Mon Sep 17 00:00:00 2001 From: "Steven Rostedt (Red Hat)" Date: Thu, 6 Nov 2014 16:38:28 -0500 Subject: seq_buf: Create seq_buf_used() to find out how much was written Add a helper function seq_buf_used() that replaces the SEQ_BUF_USED() private macro to let callers have a method to know how much of the seq_buf was written to. Link: http://lkml.kernel.org/r/20141114011412.170377300@goodmis.org Link: http://lkml.kernel.org/r/20141114011413.321654244@goodmis.org Reviewed-by: Petr Mladek Signed-off-by: Steven Rostedt --- include/linux/seq_buf.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'include/linux') diff --git a/include/linux/seq_buf.h b/include/linux/seq_buf.h index 5d91262433e2..93718e570d4c 100644 --- a/include/linux/seq_buf.h +++ b/include/linux/seq_buf.h @@ -64,6 +64,12 @@ seq_buf_buffer_left(struct seq_buf *s) return (s->size - 1) - s->len; } +/* How much buffer was written? */ +static inline unsigned int seq_buf_used(struct seq_buf *s) +{ + return min(s->len, s->size); +} + extern __printf(2, 3) int seq_buf_printf(struct seq_buf *s, const char *fmt, ...); extern __printf(2, 0) -- cgit v1.2.3 From 5ac48378414dccca735897c4d7f4e19987c8977c Mon Sep 17 00:00:00 2001 From: "Steven Rostedt (Red Hat)" Date: Fri, 14 Nov 2014 15:49:41 -0500 Subject: tracing: Use trace_seq_used() and seq_buf_used() instead of len As the seq_buf->len will soon be +1 size when there's an overflow, we must use trace_seq_used() or seq_buf_used() methods to get the real length. This will prevent buffer overflow issues if just the len of the seq_buf descriptor is used to copy memory. Link: http://lkml.kernel.org/r/20141114121911.09ba3d38@gandalf.local.home Reported-by: Petr Mladek Signed-off-by: Steven Rostedt --- include/linux/trace_seq.h | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/trace_seq.h b/include/linux/trace_seq.h index 85d37106be3d..cfaf5a1d4bad 100644 --- a/include/linux/trace_seq.h +++ b/include/linux/trace_seq.h @@ -23,6 +23,24 @@ trace_seq_init(struct trace_seq *s) s->full = 0; } +/** + * trace_seq_used - amount of actual data written to buffer + * @s: trace sequence descriptor + * + * Returns the amount of data written to the buffer. + * + * IMPORTANT! + * + * Use this instead of @s->seq.len if you need to pass the amount + * of data from the buffer to another buffer (userspace, or what not). + * The @s->seq.len on overflow is bigger than the buffer size and + * using it can cause access to undefined memory. + */ +static inline int trace_seq_used(struct trace_seq *s) +{ + return seq_buf_used(&s->seq); +} + /** * trace_seq_buffer_ptr - return pointer to next location in buffer * @s: trace sequence descriptor @@ -35,7 +53,7 @@ trace_seq_init(struct trace_seq *s) static inline unsigned char * trace_seq_buffer_ptr(struct trace_seq *s) { - return s->buffer + s->seq.len; + return s->buffer + seq_buf_used(&s->seq); } /** -- cgit v1.2.3 From 8cd709ae7658a7fd7f6630699e3229188c2591e4 Mon Sep 17 00:00:00 2001 From: "Steven Rostedt (Red Hat)" Date: Wed, 29 Oct 2014 15:26:09 -0400 Subject: tracing: Have seq_buf use full buffer Currently seq_buf is full when all but one byte of the buffer is filled. Change it so that the seq_buf is full when all of the buffer is filled. Some of the functions would fill the buffer completely and report everything was fine. This was inconsistent with the max of size - 1. Changing this to be max of size makes all functions consistent. Link: http://lkml.kernel.org/r/20141104160222.502133196@goodmis.org Link: http://lkml.kernel.org/r/20141114011412.811957882@goodmis.org Tested-by: Jiri Kosina Acked-by: Jiri Kosina Reviewed-by: Petr Mladek Signed-off-by: Steven Rostedt --- include/linux/seq_buf.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'include/linux') diff --git a/include/linux/seq_buf.h b/include/linux/seq_buf.h index 93718e570d4c..0800a24b4348 100644 --- a/include/linux/seq_buf.h +++ b/include/linux/seq_buf.h @@ -43,13 +43,13 @@ seq_buf_init(struct seq_buf *s, unsigned char *buf, unsigned int size) static inline bool seq_buf_has_overflowed(struct seq_buf *s) { - return s->len == s->size; + return s->len > s->size; } static inline void seq_buf_set_overflow(struct seq_buf *s) { - s->len = s->size; + s->len = s->size + 1; } /* @@ -61,7 +61,7 @@ seq_buf_buffer_left(struct seq_buf *s) if (seq_buf_has_overflowed(s)) return 0; - return (s->size - 1) - s->len; + return s->size - s->len; } /* How much buffer was written? */ -- cgit v1.2.3 From 01cb06a4c229908d239149017049fdd1fca1dd51 Mon Sep 17 00:00:00 2001 From: "Steven Rostedt (Red Hat)" Date: Wed, 29 Oct 2014 17:30:50 -0400 Subject: tracing: Add seq_buf_get_buf() and seq_buf_commit() helper functions Add two helper functions; seq_buf_get_buf() and seq_buf_commit() that are used by seq_buf_path(). This makes the code similar to the seq_file: seq_path() function, and will help to be able to consolidate the functions between seq_file and trace_seq. Link: http://lkml.kernel.org/r/20141104160222.644881406@goodmis.org Link: http://lkml.kernel.org/r/20141114011412.977571447@goodmis.org Tested-by: Jiri Kosina Acked-by: Jiri Kosina Reviewed-by: Petr Mladek Signed-off-by: Steven Rostedt --- include/linux/seq_buf.h | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) (limited to 'include/linux') diff --git a/include/linux/seq_buf.h b/include/linux/seq_buf.h index 0800a24b4348..12c64282aa98 100644 --- a/include/linux/seq_buf.h +++ b/include/linux/seq_buf.h @@ -70,6 +70,47 @@ static inline unsigned int seq_buf_used(struct seq_buf *s) return min(s->len, s->size); } +/** + * seq_buf_get_buf - get buffer to write arbitrary data to + * @s: the seq_buf handle + * @bufp: the beginning of the buffer is stored here + * + * Return the number of bytes available in the buffer, or zero if + * there's no space. + */ +static inline size_t seq_buf_get_buf(struct seq_buf *s, char **bufp) +{ + WARN_ON(s->len > s->size + 1); + + if (s->len < s->size) { + *bufp = s->buffer + s->len; + return s->size - s->len; + } + + *bufp = NULL; + return 0; +} + +/** + * seq_buf_commit - commit data to the buffer + * @s: the seq_buf handle + * @num: the number of bytes to commit + * + * Commit @num bytes of data written to a buffer previously acquired + * by seq_buf_get. To signal an error condition, or that the data + * didn't fit in the available space, pass a negative @num value. + */ +static inline void seq_buf_commit(struct seq_buf *s, int num) +{ + if (num < 0) { + seq_buf_set_overflow(s); + } else { + /* num must be negative on overflow */ + BUG_ON(s->len + num > s->size); + s->len += num; + } +} + extern __printf(2, 3) int seq_buf_printf(struct seq_buf *s, const char *fmt, ...); extern __printf(2, 0) -- cgit v1.2.3 From 2448913ed2aa7a7424d9b9ca79861d13c746a3f1 Mon Sep 17 00:00:00 2001 From: "Steven Rostedt (Red Hat)" Date: Mon, 3 Nov 2014 18:53:50 -0500 Subject: seq-buf: Make seq_buf_bprintf() conditional on CONFIG_BINARY_PRINTF The function bstr_printf() from lib/vsprnintf.c is only available if CONFIG_BINARY_PRINTF is defined. This is due to the only user currently being the tracing infrastructure, which needs to select this config when tracing is configured. Until there is another user of the binary printf formats, this will continue to be the case. Since seq_buf.c is now lives in lib/ and is compiled even without tracing, it must encompass its use of bstr_printf() which is used by seq_buf_printf(). This too is only used by the tracing infrastructure and is still encapsulated by the CONFIG_BINARY_PRINTF. Link: http://lkml.kernel.org/r/20141104160222.969013383@goodmis.org Tested-by: Jiri Kosina Acked-by: Jiri Kosina Reviewed-by: Petr Mladek Signed-off-by: Steven Rostedt --- include/linux/seq_buf.h | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/seq_buf.h b/include/linux/seq_buf.h index 12c64282aa98..9aafe0e24c68 100644 --- a/include/linux/seq_buf.h +++ b/include/linux/seq_buf.h @@ -115,8 +115,6 @@ extern __printf(2, 3) int seq_buf_printf(struct seq_buf *s, const char *fmt, ...); extern __printf(2, 0) int seq_buf_vprintf(struct seq_buf *s, const char *fmt, va_list args); -extern int -seq_buf_bprintf(struct seq_buf *s, const char *fmt, const u32 *binary); extern int seq_buf_print_seq(struct seq_file *m, struct seq_buf *s); extern int seq_buf_to_user(struct seq_buf *s, char __user *ubuf, int cnt); @@ -130,4 +128,9 @@ extern int seq_buf_path(struct seq_buf *s, const struct path *path, const char * extern int seq_buf_bitmask(struct seq_buf *s, const unsigned long *maskp, int nmaskbits); +#ifdef CONFIG_BINARY_PRINTF +extern int +seq_buf_bprintf(struct seq_buf *s, const char *fmt, const u32 *binary); +#endif + #endif /* _LINUX_SEQ_BUF_H */ -- cgit v1.2.3 From afdc34a3d3b823a12a93b822ee1efb566f884032 Mon Sep 17 00:00:00 2001 From: "Steven Rostedt (Red Hat)" Date: Thu, 19 Jun 2014 17:33:31 -0400 Subject: printk: Add per_cpu printk func to allow printk to be diverted Being able to divert printk to call another function besides the normal logging is useful for such things like NMI handling. If some functions are to be called from NMI that does printk() it is possible to lock up the box if the nmi handler triggers when another printk is happening. One example of this use is to perform a stack trace on all CPUs via NMI. But if the NMI is to do the printk() it can cause the system to lock up. By allowing the printk to be diverted to another function that can safely record the printk output and then print it when it in a safe context then NMIs will be safe to call these functions like show_regs(). Link: http://lkml.kernel.org/p/20140619213952.209176403@goodmis.org Tested-by: Jiri Kosina Acked-by: Jiri Kosina Acked-by: Paul E. McKenney Reviewed-by: Petr Mladek Signed-off-by: Steven Rostedt --- include/linux/percpu.h | 3 +++ include/linux/printk.h | 2 ++ 2 files changed, 5 insertions(+) (limited to 'include/linux') diff --git a/include/linux/percpu.h b/include/linux/percpu.h index a3aa63e47637..ba2e85a0ff5b 100644 --- a/include/linux/percpu.h +++ b/include/linux/percpu.h @@ -134,4 +134,7 @@ extern phys_addr_t per_cpu_ptr_to_phys(void *addr); (typeof(type) __percpu *)__alloc_percpu(sizeof(type), \ __alignof__(type)) +/* To avoid include hell, as printk can not declare this, we declare it here */ +DECLARE_PER_CPU(printk_func_t, printk_func); + #endif /* __LINUX_PERCPU_H */ diff --git a/include/linux/printk.h b/include/linux/printk.h index d78125f73ac4..3bbd979d32fb 100644 --- a/include/linux/printk.h +++ b/include/linux/printk.h @@ -162,6 +162,8 @@ extern int kptr_restrict; extern void wake_up_klogd(void); +typedef int(*printk_func_t)(const char *fmt, va_list args); + void log_buf_kexec_setup(void); void __init setup_log_buf(int early); void dump_stack_set_arch_desc(const char *fmt, ...); -- cgit v1.2.3 From 62d956dc3e11138c5ffd4b2c62e4f909c5180a12 Mon Sep 17 00:00:00 2001 From: Boris BREZILLON Date: Mon, 20 Oct 2014 10:46:14 +0200 Subject: mtd: nand: provide detailed description for raw read/write page methods read_page_raw and write_page_raw method description is not clear enough. It clearly specifies that ECC correction should not be involved but does not talk about specific layout (by layout I mean where in-band and out-of-band data are stored on the NAND media) used by NAND/ECC controllers. Those specific layouts might impact MTD users and thus should be hidden (as already done in the standard NAND_ECC_HW_SYNDROME implementation). Clearly state this constraint in the nand_ecc_ctrl struct documentation. Signed-off-by: Boris Brezillon Signed-off-by: Brian Norris --- include/linux/mtd/nand.h | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h index e4d451e4600b..b14d190b593a 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -455,8 +455,21 @@ struct nand_hw_control { * be provided if an hardware ECC is available * @calculate: function for ECC calculation or readback from ECC hardware * @correct: function for ECC correction, matching to ECC generator (sw/hw) - * @read_page_raw: function to read a raw page without ECC - * @write_page_raw: function to write a raw page without ECC + * @read_page_raw: function to read a raw page without ECC. This function + * should hide the specific layout used by the ECC + * controller and always return contiguous in-band and + * out-of-band data even if they're not stored + * contiguously on the NAND chip (e.g. + * NAND_ECC_HW_SYNDROME interleaves in-band and + * out-of-band data). + * @write_page_raw: function to write a raw page without ECC. This function + * should hide the specific layout used by the ECC + * controller and consider the passed data as contiguous + * in-band and out-of-band data. ECC controller is + * responsible for doing the appropriate transformations + * to adapt to its specific layout (e.g. + * NAND_ECC_HW_SYNDROME interleaves in-band and + * out-of-band data). * @read_page: function to read a page according to the ECC generator * requirements; returns maximum number of bitflips corrected in * any single ECC step, 0 if bitflips uncorrectable, -EIO hw error -- cgit v1.2.3 From 3943f42c11896ce82ad3da132c8a5630313bdd0e Mon Sep 17 00:00:00 2001 From: Andrey Utkin Date: Fri, 14 Nov 2014 05:09:55 +0400 Subject: Replace mentions of "list_struct" to "list_head" There's no such thing as "list_struct". Signed-off-by: Andrey Utkin Acked-by: Steven Rostedt Acked-by: Mauro Carvalho Chehab Acked-by: Paul E. McKenney Acked-by: Alex Deucher Signed-off-by: Jiri Kosina --- include/linux/list.h | 34 +++++++++++++++++----------------- include/linux/plist.h | 10 +++++----- include/linux/rculist.h | 8 ++++---- 3 files changed, 26 insertions(+), 26 deletions(-) (limited to 'include/linux') diff --git a/include/linux/list.h b/include/linux/list.h index f33f831eb3c8..feb773c76ee0 100644 --- a/include/linux/list.h +++ b/include/linux/list.h @@ -346,7 +346,7 @@ static inline void list_splice_tail_init(struct list_head *list, * list_entry - get the struct for this entry * @ptr: the &struct list_head pointer. * @type: the type of the struct this is embedded in. - * @member: the name of the list_struct within the struct. + * @member: the name of the list_head within the struct. */ #define list_entry(ptr, type, member) \ container_of(ptr, type, member) @@ -355,7 +355,7 @@ static inline void list_splice_tail_init(struct list_head *list, * list_first_entry - get the first element from a list * @ptr: the list head to take the element from. * @type: the type of the struct this is embedded in. - * @member: the name of the list_struct within the struct. + * @member: the name of the list_head within the struct. * * Note, that list is expected to be not empty. */ @@ -366,7 +366,7 @@ static inline void list_splice_tail_init(struct list_head *list, * list_last_entry - get the last element from a list * @ptr: the list head to take the element from. * @type: the type of the struct this is embedded in. - * @member: the name of the list_struct within the struct. + * @member: the name of the list_head within the struct. * * Note, that list is expected to be not empty. */ @@ -377,7 +377,7 @@ static inline void list_splice_tail_init(struct list_head *list, * list_first_entry_or_null - get the first element from a list * @ptr: the list head to take the element from. * @type: the type of the struct this is embedded in. - * @member: the name of the list_struct within the struct. + * @member: the name of the list_head within the struct. * * Note that if the list is empty, it returns NULL. */ @@ -387,7 +387,7 @@ static inline void list_splice_tail_init(struct list_head *list, /** * list_next_entry - get the next element in list * @pos: the type * to cursor - * @member: the name of the list_struct within the struct. + * @member: the name of the list_head within the struct. */ #define list_next_entry(pos, member) \ list_entry((pos)->member.next, typeof(*(pos)), member) @@ -395,7 +395,7 @@ static inline void list_splice_tail_init(struct list_head *list, /** * list_prev_entry - get the prev element in list * @pos: the type * to cursor - * @member: the name of the list_struct within the struct. + * @member: the name of the list_head within the struct. */ #define list_prev_entry(pos, member) \ list_entry((pos)->member.prev, typeof(*(pos)), member) @@ -441,7 +441,7 @@ static inline void list_splice_tail_init(struct list_head *list, * list_for_each_entry - iterate over list of given type * @pos: the type * to use as a loop cursor. * @head: the head for your list. - * @member: the name of the list_struct within the struct. + * @member: the name of the list_head within the struct. */ #define list_for_each_entry(pos, head, member) \ for (pos = list_first_entry(head, typeof(*pos), member); \ @@ -452,7 +452,7 @@ static inline void list_splice_tail_init(struct list_head *list, * list_for_each_entry_reverse - iterate backwards over list of given type. * @pos: the type * to use as a loop cursor. * @head: the head for your list. - * @member: the name of the list_struct within the struct. + * @member: the name of the list_head within the struct. */ #define list_for_each_entry_reverse(pos, head, member) \ for (pos = list_last_entry(head, typeof(*pos), member); \ @@ -463,7 +463,7 @@ static inline void list_splice_tail_init(struct list_head *list, * list_prepare_entry - prepare a pos entry for use in list_for_each_entry_continue() * @pos: the type * to use as a start point * @head: the head of the list - * @member: the name of the list_struct within the struct. + * @member: the name of the list_head within the struct. * * Prepares a pos entry for use as a start point in list_for_each_entry_continue(). */ @@ -474,7 +474,7 @@ static inline void list_splice_tail_init(struct list_head *list, * list_for_each_entry_continue - continue iteration over list of given type * @pos: the type * to use as a loop cursor. * @head: the head for your list. - * @member: the name of the list_struct within the struct. + * @member: the name of the list_head within the struct. * * Continue to iterate over list of given type, continuing after * the current position. @@ -488,7 +488,7 @@ static inline void list_splice_tail_init(struct list_head *list, * list_for_each_entry_continue_reverse - iterate backwards from the given point * @pos: the type * to use as a loop cursor. * @head: the head for your list. - * @member: the name of the list_struct within the struct. + * @member: the name of the list_head within the struct. * * Start to iterate over list of given type backwards, continuing after * the current position. @@ -502,7 +502,7 @@ static inline void list_splice_tail_init(struct list_head *list, * list_for_each_entry_from - iterate over list of given type from the current point * @pos: the type * to use as a loop cursor. * @head: the head for your list. - * @member: the name of the list_struct within the struct. + * @member: the name of the list_head within the struct. * * Iterate over list of given type, continuing from current position. */ @@ -515,7 +515,7 @@ static inline void list_splice_tail_init(struct list_head *list, * @pos: the type * to use as a loop cursor. * @n: another type * to use as temporary storage * @head: the head for your list. - * @member: the name of the list_struct within the struct. + * @member: the name of the list_head within the struct. */ #define list_for_each_entry_safe(pos, n, head, member) \ for (pos = list_first_entry(head, typeof(*pos), member), \ @@ -528,7 +528,7 @@ static inline void list_splice_tail_init(struct list_head *list, * @pos: the type * to use as a loop cursor. * @n: another type * to use as temporary storage * @head: the head for your list. - * @member: the name of the list_struct within the struct. + * @member: the name of the list_head within the struct. * * Iterate over list of given type, continuing after current point, * safe against removal of list entry. @@ -544,7 +544,7 @@ static inline void list_splice_tail_init(struct list_head *list, * @pos: the type * to use as a loop cursor. * @n: another type * to use as temporary storage * @head: the head for your list. - * @member: the name of the list_struct within the struct. + * @member: the name of the list_head within the struct. * * Iterate over list of given type from current point, safe against * removal of list entry. @@ -559,7 +559,7 @@ static inline void list_splice_tail_init(struct list_head *list, * @pos: the type * to use as a loop cursor. * @n: another type * to use as temporary storage * @head: the head for your list. - * @member: the name of the list_struct within the struct. + * @member: the name of the list_head within the struct. * * Iterate backwards over list of given type, safe against removal * of list entry. @@ -574,7 +574,7 @@ static inline void list_splice_tail_init(struct list_head *list, * list_safe_reset_next - reset a stale list_for_each_entry_safe loop * @pos: the loop cursor used in the list_for_each_entry_safe loop * @n: temporary storage used in list_for_each_entry_safe - * @member: the name of the list_struct within the struct. + * @member: the name of the list_head within the struct. * * list_safe_reset_next is not safe to use in general if the list may be * modified concurrently (eg. the lock is dropped in the loop body). An diff --git a/include/linux/plist.h b/include/linux/plist.h index 8b6c970cff6c..97883604a3c5 100644 --- a/include/linux/plist.h +++ b/include/linux/plist.h @@ -176,7 +176,7 @@ extern void plist_requeue(struct plist_node *node, struct plist_head *head); * plist_for_each_entry - iterate over list of given type * @pos: the type * to use as a loop counter * @head: the head for your list - * @mem: the name of the list_struct within the struct + * @mem: the name of the list_head within the struct */ #define plist_for_each_entry(pos, head, mem) \ list_for_each_entry(pos, &(head)->node_list, mem.node_list) @@ -185,7 +185,7 @@ extern void plist_requeue(struct plist_node *node, struct plist_head *head); * plist_for_each_entry_continue - continue iteration over list of given type * @pos: the type * to use as a loop cursor * @head: the head for your list - * @m: the name of the list_struct within the struct + * @m: the name of the list_head within the struct * * Continue to iterate over list of given type, continuing after * the current position. @@ -198,7 +198,7 @@ extern void plist_requeue(struct plist_node *node, struct plist_head *head); * @pos: the type * to use as a loop counter * @n: another type * to use as temporary storage * @head: the head for your list - * @m: the name of the list_struct within the struct + * @m: the name of the list_head within the struct * * Iterate over list of given type, safe against removal of list entry. */ @@ -229,7 +229,7 @@ static inline int plist_node_empty(const struct plist_node *node) * plist_first_entry - get the struct for the first entry * @head: the &struct plist_head pointer * @type: the type of the struct this is embedded in - * @member: the name of the list_struct within the struct + * @member: the name of the list_head within the struct */ #ifdef CONFIG_DEBUG_PI_LIST # define plist_first_entry(head, type, member) \ @@ -246,7 +246,7 @@ static inline int plist_node_empty(const struct plist_node *node) * plist_last_entry - get the struct for the last entry * @head: the &struct plist_head pointer * @type: the type of the struct this is embedded in - * @member: the name of the list_struct within the struct + * @member: the name of the list_head within the struct */ #ifdef CONFIG_DEBUG_PI_LIST # define plist_last_entry(head, type, member) \ diff --git a/include/linux/rculist.h b/include/linux/rculist.h index 372ad5e0dcb8..664060bd2f43 100644 --- a/include/linux/rculist.h +++ b/include/linux/rculist.h @@ -241,7 +241,7 @@ static inline void list_splice_init_rcu(struct list_head *list, * list_entry_rcu - get the struct for this entry * @ptr: the &struct list_head pointer. * @type: the type of the struct this is embedded in. - * @member: the name of the list_struct within the struct. + * @member: the name of the list_head within the struct. * * This primitive may safely run concurrently with the _rcu list-mutation * primitives such as list_add_rcu() as long as it's guarded by rcu_read_lock(). @@ -278,7 +278,7 @@ static inline void list_splice_init_rcu(struct list_head *list, * list_first_or_null_rcu - get the first element from a list * @ptr: the list head to take the element from. * @type: the type of the struct this is embedded in. - * @member: the name of the list_struct within the struct. + * @member: the name of the list_head within the struct. * * Note that if the list is empty, it returns NULL. * @@ -296,7 +296,7 @@ static inline void list_splice_init_rcu(struct list_head *list, * list_for_each_entry_rcu - iterate over rcu list of given type * @pos: the type * to use as a loop cursor. * @head: the head for your list. - * @member: the name of the list_struct within the struct. + * @member: the name of the list_head within the struct. * * This list-traversal primitive may safely run concurrently with * the _rcu list-mutation primitives such as list_add_rcu() @@ -311,7 +311,7 @@ static inline void list_splice_init_rcu(struct list_head *list, * list_for_each_entry_continue_rcu - continue iteration over list of given type * @pos: the type * to use as a loop cursor. * @head: the head for your list. - * @member: the name of the list_struct within the struct. + * @member: the name of the list_head within the struct. * * Continue to iterate over list of given type, continuing after * the current position. -- cgit v1.2.3 From f9df89d897ee0928aa4e03b30250e87f5d1e788a Mon Sep 17 00:00:00 2001 From: Eduardo Valentin Date: Mon, 6 Jan 2014 09:04:18 -0400 Subject: thermal: introduce clock cooling device This patch introduces a new thermal cooling device based on common clock framework. The original motivation to write this cooling device is to be able to cool down thermal zones using clocks that feed co-processors, such as GPUs, DSPs, Image Processing Co-processors, etc. But it is written in a way that it can be used on top of any clock. The implementation is pretty straight forward. The code creates a thermal cooling device based on a pair of a struct device and a clock name. The struct device is assumed to be usable by the OPP layer. The OPP layer is used as source of the list of possible frequencies. The (cpufreq) frequency table is then used as a map from frequencies to cooling states. Cooling states are indexes to the frequency table. The logic sits on top of common clock framework, specifically on clock pre notifications. Any PRE_RATE_CHANGE is hijacked, and the transition is only allowed when the new rate is within the thermal limit (cooling state -> freq). When a thermal cooling device state transition is requested, the clock is also checked to verify if the current clock rate is within the new thermal limit. Cc: Zhang Rui Cc: Mike Turquette Cc: Nishanth Menon Cc: Pavel Machek Cc: "Rafael J. Wysocki" Cc: Len Brown Cc: Greg Kroah-Hartman Cc: linux-pm@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Eduardo Valentin Signed-off-by: Eduardo Valentin --- include/linux/clock_cooling.h | 65 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 65 insertions(+) create mode 100644 include/linux/clock_cooling.h (limited to 'include/linux') diff --git a/include/linux/clock_cooling.h b/include/linux/clock_cooling.h new file mode 100644 index 000000000000..4d1019d56f7f --- /dev/null +++ b/include/linux/clock_cooling.h @@ -0,0 +1,65 @@ +/* + * linux/include/linux/clock_cooling.h + * + * Copyright (C) 2014 Eduardo Valentin + * + * Copyright (C) 2013 Texas Instruments Inc. + * Contact: Eduardo Valentin + * + * Highly based on cpu_cooling.c. + * Copyright (C) 2012 Samsung Electronics Co., Ltd(http://www.samsung.com) + * Copyright (C) 2012 Amit Daniel + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + */ + +#ifndef __CPU_COOLING_H__ +#define __CPU_COOLING_H__ + +#include +#include +#include + +#ifdef CONFIG_CLOCK_THERMAL +/** + * clock_cooling_register - function to create clock cooling device. + * @dev: struct device pointer to the device used as clock cooling device. + * @clock_name: string containing the clock used as cooling mechanism. + */ +struct thermal_cooling_device * +clock_cooling_register(struct device *dev, const char *clock_name); + +/** + * clock_cooling_unregister - function to remove clock cooling device. + * @cdev: thermal cooling device pointer. + */ +void clock_cooling_unregister(struct thermal_cooling_device *cdev); + +unsigned long clock_cooling_get_level(struct thermal_cooling_device *cdev, + unsigned long freq); +#else /* !CONFIG_CLOCK_THERMAL */ +static inline struct thermal_cooling_device * +clock_cooling_register(struct device *dev, const char *clock_name) +{ + return NULL; +} +static inline +void clock_cooling_unregister(struct thermal_cooling_device *cdev) +{ +} +static inline +unsigned long clock_cooling_get_level(struct thermal_cooling_device *cdev, + unsigned long freq) +{ + return THERMAL_CSTATE_INVALID; +} +#endif /* CONFIG_CLOCK_THERMAL */ + +#endif /* __CPU_COOLING_H__ */ -- cgit v1.2.3 From 2251aef64a38db60f4ae7a4a83f9203c6791f196 Mon Sep 17 00:00:00 2001 From: Eduardo Valentin Date: Fri, 7 Nov 2014 21:24:39 -0400 Subject: thermal: of: improve of-thermal sensor registration API Different drivers request API extensions in of-thermal. For this reason, additional callbacks are required to fit the new drivers needs. The current API implementation expects the registering sensor driver to provide a get_temp and get_trend callbacks as function parameters. As the amount of callbacks is growing, this patch changes the existing implementation to use a .ops field to hold all the of thermal callbacks to sensor drivers. This patch also changes the existing of-thermal users to fit the new API design. No functional change is introduced in this patch. Cc: Alexandre Courbot Cc: devicetree@vger.kernel.org Cc: Grant Likely Cc: Guenter Roeck Cc: Jean Delvare Cc: linux-kernel@vger.kernel.org Cc: linux-pm@vger.kernel.org Cc: linux-tegra@vger.kernel.org Cc: lm-sensors@lm-sensors.org Cc: Rob Herring Cc: Stephen Warren Cc: Thierry Reding Cc: Zhang Rui Acked-by: Guenter Roeck Tested-by: Mikko Perttunen Reviewed-by: Mikko Perttunen Reviewed-by: Alexandre Courbot Reviewed-by: Lukasz Majewski Signed-off-by: Eduardo Valentin --- include/linux/thermal.h | 24 ++++++++++++++++++------ 1 file changed, 18 insertions(+), 6 deletions(-) (limited to 'include/linux') diff --git a/include/linux/thermal.h b/include/linux/thermal.h index ef90838b36a0..5bc28a70014e 100644 --- a/include/linux/thermal.h +++ b/include/linux/thermal.h @@ -289,19 +289,31 @@ struct thermal_genl_event { enum events event; }; +/** + * struct thermal_zone_of_device_ops - scallbacks for handling DT based zones + * + * Mandatory: + * @get_temp: a pointer to a function that reads the sensor temperature. + * + * Optional: + * @get_trend: a pointer to a function that reads the sensor temperature trend. + */ +struct thermal_zone_of_device_ops { + int (*get_temp)(void *, long *); + int (*get_trend)(void *, long *); +}; + /* Function declarations */ #ifdef CONFIG_THERMAL_OF struct thermal_zone_device * -thermal_zone_of_sensor_register(struct device *dev, int id, - void *data, int (*get_temp)(void *, long *), - int (*get_trend)(void *, long *)); +thermal_zone_of_sensor_register(struct device *dev, int id, void *data, + const struct thermal_zone_of_device_ops *ops); void thermal_zone_of_sensor_unregister(struct device *dev, struct thermal_zone_device *tz); #else static inline struct thermal_zone_device * -thermal_zone_of_sensor_register(struct device *dev, int id, - void *data, int (*get_temp)(void *, long *), - int (*get_trend)(void *, long *)) +thermal_zone_of_sensor_register(struct device *dev, int id, void *data, + const struct thermal_zone_of_device_ops *ops) { return NULL; } -- cgit v1.2.3 From d451057464a7ea2fe400e56c8a7e004c875f2a84 Mon Sep 17 00:00:00 2001 From: Heikki Krogerus Date: Wed, 19 Nov 2014 17:28:17 +0200 Subject: phy: safer to_phy() macro This makes to_phy() macro work with other variable names besides "dev". Signed-off-by: Heikki Krogerus Tested-by: Vivek Gautam Acked-by: Felipe Balbi Signed-off-by: Kishon Vijay Abraham I --- include/linux/phy/phy.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h index 8cb6f815475b..9fda68324298 100644 --- a/include/linux/phy/phy.h +++ b/include/linux/phy/phy.h @@ -110,7 +110,7 @@ struct phy_init_data { .port = _port, \ } -#define to_phy(dev) (container_of((dev), struct phy, dev)) +#define to_phy(a) (container_of((a), struct phy, dev)) #define of_phy_provider_register(dev, xlate) \ __of_phy_provider_register((dev), THIS_MODULE, (xlate)) -- cgit v1.2.3 From b7bc15b98e843926d01eb03b9c0e196d8ddbadeb Mon Sep 17 00:00:00 2001 From: Heikki Krogerus Date: Wed, 19 Nov 2014 17:28:18 +0200 Subject: phy: improved lookup method Separates registration of the phy and the lookup. The method is copied from clkdev.c, Signed-off-by: Heikki Krogerus Signed-off-by: Kishon Vijay Abraham I --- include/linux/phy/phy.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'include/linux') diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h index 9fda68324298..849284e5873f 100644 --- a/include/linux/phy/phy.h +++ b/include/linux/phy/phy.h @@ -110,6 +110,13 @@ struct phy_init_data { .port = _port, \ } +struct phy_lookup { + struct list_head node; + const char *dev_id; + const char *con_id; + struct phy *phy; +}; + #define to_phy(a) (container_of((a), struct phy, dev)) #define of_phy_provider_register(dev, xlate) \ @@ -174,6 +181,8 @@ struct phy_provider *__devm_of_phy_provider_register(struct device *dev, void of_phy_provider_unregister(struct phy_provider *phy_provider); void devm_of_phy_provider_unregister(struct device *dev, struct phy_provider *phy_provider); +int phy_create_lookup(struct phy *phy, const char *con_id, const char *dev_id); +void phy_remove_lookup(struct phy *phy, const char *con_id, const char *dev_id); #else static inline int phy_pm_runtime_get(struct phy *phy) { @@ -345,6 +354,13 @@ static inline void devm_of_phy_provider_unregister(struct device *dev, struct phy_provider *phy_provider) { } +static inline int +phy_create_lookup(struct phy *phy, const char *con_id, const char *dev_id) +{ + return 0; +} +static inline void phy_remove_lookup(struct phy *phy, const char *con_id, + const char *dev_id) { } #endif #endif /* __DRIVERS_PHY_H */ -- cgit v1.2.3 From df9f7b311db1edae7ec5e2c78aa92fce7b9dd34d Mon Sep 17 00:00:00 2001 From: Kiran Raparthy Date: Fri, 21 Nov 2014 11:31:20 +0530 Subject: usb: phy: introduce usb_phy_set_event interface MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit PHY drivers require a generic interface to handle per-PHY events. usb_phy_set_event interface sets event to phy event. PHY drivers call this interface for each phy event. Cc: Felipe Balbi Cc: Greg Kroah-Hartman Cc: linux-kernel@vger.kernel.org Cc: linux-usb@vger.kernel.org Cc: Android Kernel Team Cc: John Stultz Cc: Sumit Semwal Cc: Arve Hj�nnev�g Cc: Benoit Goby [Original patch in Android from Todd] Cc: Todd Poynor Signed-off-by: Kiran Raparthy Signed-off-by: Felipe Balbi --- include/linux/usb/phy.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include/linux') diff --git a/include/linux/usb/phy.h b/include/linux/usb/phy.h index ac7d7913694f..f499c23e6342 100644 --- a/include/linux/usb/phy.h +++ b/include/linux/usb/phy.h @@ -209,6 +209,7 @@ extern void usb_put_phy(struct usb_phy *); extern void devm_usb_put_phy(struct device *dev, struct usb_phy *x); extern int usb_bind_phy(const char *dev_name, u8 index, const char *phy_dev_name); +extern void usb_phy_set_event(struct usb_phy *x, unsigned long event); #else static inline struct usb_phy *usb_get_phy(enum usb_phy_type type) { @@ -250,6 +251,10 @@ static inline int usb_bind_phy(const char *dev_name, u8 index, { return -EOPNOTSUPP; } + +static inline void usb_phy_set_event(struct usb_phy *x, unsigned long event) +{ +} #endif static inline int -- cgit v1.2.3 From 04b74b27c2941e5d62120f6fee3a0a9388a30613 Mon Sep 17 00:00:00 2001 From: "Steven Rostedt (Red Hat)" Date: Fri, 21 Nov 2014 09:16:58 -0500 Subject: printk/percpu: Define printk_func when printk is not defined To avoid include hell, the per_cpu variable printk_func was declared in percpu.h. But it is only defined if printk is defined. As users of printk may also use the printk_func variable, it needs to be defined even if CONFIG_PRINTK is not. Also add a printk.h include in percpu.h just to be safe. Link: http://lkml.kernel.org/r/20141121183215.01ba539c@canb.auug.org.au Reported-by: Stephen Rothwell Signed-off-by: Steven Rostedt --- include/linux/percpu.h | 1 + include/linux/printk.h | 4 ++-- 2 files changed, 3 insertions(+), 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/percpu.h b/include/linux/percpu.h index ba2e85a0ff5b..caebf2a758dc 100644 --- a/include/linux/percpu.h +++ b/include/linux/percpu.h @@ -5,6 +5,7 @@ #include #include #include +#include #include #include diff --git a/include/linux/printk.h b/include/linux/printk.h index 3bbd979d32fb..c69be9ee8f48 100644 --- a/include/linux/printk.h +++ b/include/linux/printk.h @@ -124,6 +124,8 @@ static inline __printf(1, 2) __cold void early_printk(const char *s, ...) { } #endif +typedef int(*printk_func_t)(const char *fmt, va_list args); + #ifdef CONFIG_PRINTK asmlinkage __printf(5, 0) int vprintk_emit(int facility, int level, @@ -162,8 +164,6 @@ extern int kptr_restrict; extern void wake_up_klogd(void); -typedef int(*printk_func_t)(const char *fmt, va_list args); - void log_buf_kexec_setup(void); void __init setup_log_buf(int early); void dump_stack_set_arch_desc(const char *fmt, ...); -- cgit v1.2.3 From 6ef768fac9dfe3404d3fdc09909ea203a88f2f38 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Thu, 20 Nov 2014 13:45:31 +0100 Subject: kvm: x86: move ioapic.c and irq_comm.c back to arch/x86/ ia64 does not need them anymore. Ack notifiers become x86-specific too. Suggested-by: Gleb Natapov Reviewed-by: Radim Krcmar Signed-off-by: Paolo Bonzini --- include/linux/kvm_host.h | 22 ++++++++-------------- 1 file changed, 8 insertions(+), 14 deletions(-) (limited to 'include/linux') diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index ea53b04993f2..ded64cb3a081 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -395,7 +395,6 @@ struct kvm { * Update side is protected by irq_lock. */ struct kvm_irq_routing_table __rcu *irq_routing; - struct hlist_head mask_notifier_list; #endif #ifdef CONFIG_HAVE_KVM_IRQFD struct hlist_head irq_ack_notifier_list; @@ -447,6 +446,14 @@ void kvm_vcpu_uninit(struct kvm_vcpu *vcpu); int __must_check vcpu_load(struct kvm_vcpu *vcpu); void vcpu_put(struct kvm_vcpu *vcpu); +#ifdef __KVM_HAVE_IOAPIC +void kvm_vcpu_request_scan_ioapic(struct kvm *kvm); +#else +static inline void kvm_vcpu_request_scan_ioapic(struct kvm *kvm) +{ +} +#endif + #ifdef CONFIG_HAVE_KVM_IRQFD int kvm_irqfd_init(void); void kvm_irqfd_exit(void); @@ -736,19 +743,6 @@ struct kvm_assigned_dev_kernel { struct pci_saved_state *pci_saved_state; }; -struct kvm_irq_mask_notifier { - void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked); - int irq; - struct hlist_node link; -}; - -void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq, - struct kvm_irq_mask_notifier *kimn); -void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq, - struct kvm_irq_mask_notifier *kimn); -void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin, - bool mask); - int kvm_irq_map_gsi(struct kvm *kvm, struct kvm_kernel_irq_routing_entry *entries, int gsi); int kvm_irq_map_chip_pin(struct kvm *kvm, unsigned irqchip, unsigned pin); -- cgit v1.2.3 From 860f6e9eb780443381a76e3766a9698afbc5e2e5 Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Wed, 19 Nov 2014 12:59:14 +0100 Subject: net: phy: add static data field to struct phy_driver Add static driver-data field to struct phy_driver, which can be used to store structured device-type information. Signed-off-by: Johan Hovold Signed-off-by: David S. Miller --- include/linux/phy.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/linux') diff --git a/include/linux/phy.h b/include/linux/phy.h index 07794e720139..22af8f8f5802 100644 --- a/include/linux/phy.h +++ b/include/linux/phy.h @@ -433,6 +433,7 @@ struct phy_device { * by this PHY * flags: A bitfield defining certain other features this PHY * supports (like interrupts) + * driver_data: static driver data * * The drivers must implement config_aneg and read_status. All * other functions are optional. Note that none of these @@ -448,6 +449,7 @@ struct phy_driver { unsigned int phy_id_mask; u32 features; u32 flags; + const void *driver_data; /* * Called to issue a PHY software reset -- cgit v1.2.3 From 63f44b2bfccdd98193bbd602747f780c0fae0f02 Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Wed, 19 Nov 2014 12:59:18 +0100 Subject: net: phy: micrel: add generic clock-mode-select support Add generic RMII-Reference-Clock-Select support. Several Micrel PHY have an RMII-Reference-Clock-Select bit to select 25 MHz or 50 MHz clock mode. Recently, support for configuring this through device tree for KSZ8021 and KSZ8031 was added. Generalise this support so that it can be configured for other PHY types as well. Note that some PHY revisions (of the same type) has this bit inverted. This should be either configurable through a new device-tree property, or preferably, determined based on PHY ID if possible. Also note that this removes support for setting 25 MHz mode from board files which was also added by the above mentioned commit 45f56cb82e45 ("net/phy: micrel: Add clock support for KSZ8021/KSZ8031"). Signed-off-by: Johan Hovold Signed-off-by: David S. Miller --- include/linux/micrel_phy.h | 1 - 1 file changed, 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/micrel_phy.h b/include/linux/micrel_phy.h index 53d33dee70e1..2e5b194b9b19 100644 --- a/include/linux/micrel_phy.h +++ b/include/linux/micrel_phy.h @@ -37,7 +37,6 @@ /* struct phy_device dev_flags definitions */ #define MICREL_PHY_50MHZ_CLK 0x00000001 -#define MICREL_PHY_25MHZ_CLK 0x00000002 #define MICREL_KSZ9021_EXTREG_CTRL 0xB #define MICREL_KSZ9021_EXTREG_DATA_WRITE 0xC -- cgit v1.2.3 From b960a0ac6939ef4962c5abbf33e80d1382b45fc1 Mon Sep 17 00:00:00 2001 From: Jiri Pirko Date: Wed, 19 Nov 2014 14:04:56 +0100 Subject: vlan: make __vlan_hwaccel_put_tag return void Always returns the same skb it gets, so change to void. Signed-off-by: Jiri Pirko Acked-by: Pravin B Shelar Signed-off-by: David S. Miller --- include/linux/if_vlan.h | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) (limited to 'include/linux') diff --git a/include/linux/if_vlan.h b/include/linux/if_vlan.h index d69f0577a319..1b5dbc2711f9 100644 --- a/include/linux/if_vlan.h +++ b/include/linux/if_vlan.h @@ -347,13 +347,11 @@ static inline struct sk_buff *__vlan_put_tag(struct sk_buff *skb, * * Puts the VLAN TCI in @skb->vlan_tci and lets the device do the rest */ -static inline struct sk_buff *__vlan_hwaccel_put_tag(struct sk_buff *skb, - __be16 vlan_proto, - u16 vlan_tci) +static inline void __vlan_hwaccel_put_tag(struct sk_buff *skb, + __be16 vlan_proto, u16 vlan_tci) { skb->vlan_proto = vlan_proto; skb->vlan_tci = VLAN_TAG_PRESENT | vlan_tci; - return skb; } /** @@ -368,7 +366,8 @@ static inline struct sk_buff *vlan_put_tag(struct sk_buff *skb, __be16 vlan_proto, u16 vlan_tci) { if (vlan_hw_offload_capable(skb->dev->features, vlan_proto)) { - return __vlan_hwaccel_put_tag(skb, vlan_proto, vlan_tci); + __vlan_hwaccel_put_tag(skb, vlan_proto, vlan_tci); + return skb; } else { return __vlan_put_tag(skb, vlan_proto, vlan_tci); } -- cgit v1.2.3 From b4bef1b57544b18899eb15569e3bafd8d2eeeff6 Mon Sep 17 00:00:00 2001 From: Jiri Pirko Date: Wed, 19 Nov 2014 14:04:57 +0100 Subject: vlan: kill vlan_put_tag helper Since both tx and rx paths work with skb->vlan_tci, there's no need for this function anymore. Switch users directly to __vlan_hwaccel_put_tag. Signed-off-by: Jiri Pirko Signed-off-by: David S. Miller --- include/linux/if_vlan.h | 19 ------------------- 1 file changed, 19 deletions(-) (limited to 'include/linux') diff --git a/include/linux/if_vlan.h b/include/linux/if_vlan.h index 1b5dbc2711f9..75b70a5e4a6d 100644 --- a/include/linux/if_vlan.h +++ b/include/linux/if_vlan.h @@ -354,25 +354,6 @@ static inline void __vlan_hwaccel_put_tag(struct sk_buff *skb, skb->vlan_tci = VLAN_TAG_PRESENT | vlan_tci; } -/** - * vlan_put_tag - inserts VLAN tag according to device features - * @skb: skbuff to tag - * @vlan_tci: VLAN TCI to insert - * - * Assumes skb->dev is the target that will xmit this frame. - * Returns a VLAN tagged skb. - */ -static inline struct sk_buff *vlan_put_tag(struct sk_buff *skb, - __be16 vlan_proto, u16 vlan_tci) -{ - if (vlan_hw_offload_capable(skb->dev->features, vlan_proto)) { - __vlan_hwaccel_put_tag(skb, vlan_proto, vlan_tci); - return skb; - } else { - return __vlan_put_tag(skb, vlan_proto, vlan_tci); - } -} - /** * __vlan_get_tag - get the VLAN ID that is part of the payload * @skb: skbuff to query -- cgit v1.2.3 From 62749e2cb3c4a7da3eaa5c01a7e787aebeff8536 Mon Sep 17 00:00:00 2001 From: Jiri Pirko Date: Wed, 19 Nov 2014 14:04:58 +0100 Subject: vlan: rename __vlan_put_tag to vlan_insert_tag_set_proto Name fits better. Plus there's going to be introduced __vlan_insert_tag later on. Signed-off-by: Jiri Pirko Acked-by: Pravin B Shelar Signed-off-by: David S. Miller --- include/linux/if_vlan.h | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) (limited to 'include/linux') diff --git a/include/linux/if_vlan.h b/include/linux/if_vlan.h index 75b70a5e4a6d..46e4a15b9b55 100644 --- a/include/linux/if_vlan.h +++ b/include/linux/if_vlan.h @@ -320,8 +320,9 @@ static inline struct sk_buff *vlan_insert_tag(struct sk_buff *skb, } /** - * __vlan_put_tag - regular VLAN tag inserting + * vlan_insert_tag_set_proto - regular VLAN tag inserting * @skb: skbuff to tag + * @vlan_proto: VLAN encapsulation protocol * @vlan_tci: VLAN TCI to insert * * Inserts the VLAN tag into @skb as part of the payload @@ -330,8 +331,9 @@ static inline struct sk_buff *vlan_insert_tag(struct sk_buff *skb, * Following the skb_unshare() example, in case of error, the calling function * doesn't have to worry about freeing the original skb. */ -static inline struct sk_buff *__vlan_put_tag(struct sk_buff *skb, - __be16 vlan_proto, u16 vlan_tci) +static inline struct sk_buff *vlan_insert_tag_set_proto(struct sk_buff *skb, + __be16 vlan_proto, + u16 vlan_tci) { skb = vlan_insert_tag(skb, vlan_proto, vlan_tci); if (skb) -- cgit v1.2.3 From 5968250c868ceee680aa77395b24e6ddcae17d36 Mon Sep 17 00:00:00 2001 From: Jiri Pirko Date: Wed, 19 Nov 2014 14:04:59 +0100 Subject: vlan: introduce *vlan_hwaccel_push_inside helpers Use them to push skb->vlan_tci into the payload and avoid code duplication. Signed-off-by: Jiri Pirko Acked-by: Pravin B Shelar Signed-off-by: David S. Miller --- include/linux/if_vlan.h | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) (limited to 'include/linux') diff --git a/include/linux/if_vlan.h b/include/linux/if_vlan.h index 46e4a15b9b55..291e6706876e 100644 --- a/include/linux/if_vlan.h +++ b/include/linux/if_vlan.h @@ -341,6 +341,40 @@ static inline struct sk_buff *vlan_insert_tag_set_proto(struct sk_buff *skb, return skb; } +/* + * __vlan_hwaccel_push_inside - pushes vlan tag to the payload + * @skb: skbuff to tag + * + * Pushes the VLAN tag from @skb->vlan_tci inside to the payload. + * + * Following the skb_unshare() example, in case of error, the calling function + * doesn't have to worry about freeing the original skb. + */ +static inline struct sk_buff *__vlan_hwaccel_push_inside(struct sk_buff *skb) +{ + skb = vlan_insert_tag_set_proto(skb, skb->vlan_proto, + vlan_tx_tag_get(skb)); + if (likely(skb)) + skb->vlan_tci = 0; + return skb; +} +/* + * vlan_hwaccel_push_inside - pushes vlan tag to the payload + * @skb: skbuff to tag + * + * Checks is tag is present in @skb->vlan_tci and if it is, it pushes the + * VLAN tag from @skb->vlan_tci inside to the payload. + * + * Following the skb_unshare() example, in case of error, the calling function + * doesn't have to worry about freeing the original skb. + */ +static inline struct sk_buff *vlan_hwaccel_push_inside(struct sk_buff *skb) +{ + if (vlan_tx_tag_present(skb)) + skb = __vlan_hwaccel_push_inside(skb); + return skb; +} + /** * __vlan_hwaccel_put_tag - hardware accelerated VLAN inserting * @skb: skbuff to tag -- cgit v1.2.3 From 15255a43e6c917813800702e100267046e240cc0 Mon Sep 17 00:00:00 2001 From: Jiri Pirko Date: Wed, 19 Nov 2014 14:05:00 +0100 Subject: vlan: introduce __vlan_insert_tag helper which does not free skb There's a need for helper which inserts vlan tag but does not free the skb in case of an error. Suggested-by: Pravin Shelar Signed-off-by: Jiri Pirko Acked-by: Pravin B Shelar Signed-off-by: David S. Miller --- include/linux/if_vlan.h | 45 ++++++++++++++++++++++++++++++++++----------- 1 file changed, 34 insertions(+), 11 deletions(-) (limited to 'include/linux') diff --git a/include/linux/if_vlan.h b/include/linux/if_vlan.h index 291e6706876e..515a35e2a48a 100644 --- a/include/linux/if_vlan.h +++ b/include/linux/if_vlan.h @@ -282,28 +282,24 @@ static inline bool vlan_hw_offload_capable(netdev_features_t features, } /** - * vlan_insert_tag - regular VLAN tag inserting + * __vlan_insert_tag - regular VLAN tag inserting * @skb: skbuff to tag * @vlan_proto: VLAN encapsulation protocol * @vlan_tci: VLAN TCI to insert * * Inserts the VLAN tag into @skb as part of the payload - * Returns a VLAN tagged skb. If a new skb is created, @skb is freed. - * - * Following the skb_unshare() example, in case of error, the calling function - * doesn't have to worry about freeing the original skb. + * Returns error if skb_cow_head failes. * * Does not change skb->protocol so this function can be used during receive. */ -static inline struct sk_buff *vlan_insert_tag(struct sk_buff *skb, - __be16 vlan_proto, u16 vlan_tci) +static inline int __vlan_insert_tag(struct sk_buff *skb, + __be16 vlan_proto, u16 vlan_tci) { struct vlan_ethhdr *veth; - if (skb_cow_head(skb, VLAN_HLEN) < 0) { - dev_kfree_skb_any(skb); - return NULL; - } + if (skb_cow_head(skb, VLAN_HLEN) < 0) + return -ENOMEM; + veth = (struct vlan_ethhdr *)skb_push(skb, VLAN_HLEN); /* Move the mac addresses to the beginning of the new header. */ @@ -316,6 +312,33 @@ static inline struct sk_buff *vlan_insert_tag(struct sk_buff *skb, /* now, the TCI */ veth->h_vlan_TCI = htons(vlan_tci); + return 0; +} + +/** + * vlan_insert_tag - regular VLAN tag inserting + * @skb: skbuff to tag + * @vlan_proto: VLAN encapsulation protocol + * @vlan_tci: VLAN TCI to insert + * + * Inserts the VLAN tag into @skb as part of the payload + * Returns a VLAN tagged skb. If a new skb is created, @skb is freed. + * + * Following the skb_unshare() example, in case of error, the calling function + * doesn't have to worry about freeing the original skb. + * + * Does not change skb->protocol so this function can be used during receive. + */ +static inline struct sk_buff *vlan_insert_tag(struct sk_buff *skb, + __be16 vlan_proto, u16 vlan_tci) +{ + int err; + + err = __vlan_insert_tag(skb, vlan_proto, vlan_tci); + if (err) { + dev_kfree_skb_any(skb); + return NULL; + } return skb; } -- cgit v1.2.3 From e21951212f03b8d805795d8f71206853b2ab344d Mon Sep 17 00:00:00 2001 From: Jiri Pirko Date: Wed, 19 Nov 2014 14:05:01 +0100 Subject: net: move make_writable helper into common code note that skb_make_writable already exists in net/netfilter/core.c but does something slightly different. Suggested-by: Eric Dumazet Signed-off-by: Jiri Pirko Acked-by: Pravin B Shelar Signed-off-by: David S. Miller --- include/linux/skbuff.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 73c370e615de..e045516891a9 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -2678,6 +2678,7 @@ void skb_scrub_packet(struct sk_buff *skb, bool xnet); unsigned int skb_gso_transport_seglen(const struct sk_buff *skb); struct sk_buff *skb_segment(struct sk_buff *skb, netdev_features_t features); struct sk_buff *skb_vlan_untag(struct sk_buff *skb); +int skb_ensure_writable(struct sk_buff *skb, int write_len); struct skb_checksum_ops { __wsum (*update)(const void *mem, int len, __wsum wsum); -- cgit v1.2.3 From 93515d53b133d66f01aec7b231fa3e40e3d2fd9a Mon Sep 17 00:00:00 2001 From: Jiri Pirko Date: Wed, 19 Nov 2014 14:05:02 +0100 Subject: net: move vlan pop/push functions into common code So it can be used from out of openvswitch code. Did couple of cosmetic changes on the way, namely variable naming and adding support for 8021AD proto. Signed-off-by: Jiri Pirko Signed-off-by: David S. Miller --- include/linux/skbuff.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/linux') diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index e045516891a9..78c299f40bac 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -2679,6 +2679,8 @@ unsigned int skb_gso_transport_seglen(const struct sk_buff *skb); struct sk_buff *skb_segment(struct sk_buff *skb, netdev_features_t features); struct sk_buff *skb_vlan_untag(struct sk_buff *skb); int skb_ensure_writable(struct sk_buff *skb, int write_len); +int skb_vlan_pop(struct sk_buff *skb); +int skb_vlan_push(struct sk_buff *skb, __be16 vlan_proto, u16 vlan_tci); struct skb_checksum_ops { __wsum (*update)(const void *mem, int len, __wsum wsum); -- cgit v1.2.3 From f8b8be8a310a55856fd2c369dade08088d85df3b Mon Sep 17 00:00:00 2001 From: Masami Hiramatsu Date: Fri, 21 Nov 2014 05:25:16 -0500 Subject: ftrace, kprobes: Support IPMODIFY flag to find IP modify conflict Introduce FTRACE_OPS_FL_IPMODIFY to avoid conflict among ftrace users who may modify regs->ip to change the execution path. If two or more users modify the regs->ip on the same function entry, one of them will be broken. So they must add IPMODIFY flag and make sure that ftrace_set_filter_ip() succeeds. Note that ftrace doesn't allow ftrace_ops which has IPMODIFY flag to have notrace hash, and the ftrace_ops must have a filter hash (so that the ftrace_ops can hook only specific entries), because it strongly depends on the address and must be allowed for only few selected functions. Link: http://lkml.kernel.org/r/20141121102516.11844.27829.stgit@localhost.localdomain Cc: Jiri Kosina Cc: Seth Jennings Cc: Petr Mladek Cc: Vojtech Pavlik Cc: Miroslav Benes Cc: Ingo Molnar Cc: Ananth N Mavinakayanahalli Cc: Josh Poimboeuf Cc: Namhyung Kim Signed-off-by: Masami Hiramatsu [ fixed up some of the comments ] Signed-off-by: Steven Rostedt --- include/linux/ftrace.h | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h index 7b2616fa2472..ed501953f0b2 100644 --- a/include/linux/ftrace.h +++ b/include/linux/ftrace.h @@ -61,6 +61,11 @@ ftrace_func_t ftrace_ops_get_func(struct ftrace_ops *ops); /* * FTRACE_OPS_FL_* bits denote the state of ftrace_ops struct and are * set in the flags member. + * CONTROL, SAVE_REGS, SAVE_REGS_IF_SUPPORTED, RECURSION_SAFE, STUB and + * IPMODIFY are a kind of attribute flags which can be set only before + * registering the ftrace_ops, and can not be modified while registered. + * Changing those attribute flags after regsitering ftrace_ops will + * cause unexpected results. * * ENABLED - set/unset when ftrace_ops is registered/unregistered * DYNAMIC - set when ftrace_ops is registered to denote dynamically @@ -101,6 +106,10 @@ ftrace_func_t ftrace_ops_get_func(struct ftrace_ops *ops); * The ftrace_ops trampoline can be set by the ftrace users, and * in such cases the arch must not modify it. Only the arch ftrace * core code should set this flag. + * IPMODIFY - The ops can modify the IP register. This can only be set with + * SAVE_REGS. If another ops with this flag set is already registered + * for any of the functions that this ops will be registered for, then + * this ops will fail to register or set_filter_ip. */ enum { FTRACE_OPS_FL_ENABLED = 1 << 0, @@ -116,6 +125,7 @@ enum { FTRACE_OPS_FL_REMOVING = 1 << 10, FTRACE_OPS_FL_MODIFYING = 1 << 11, FTRACE_OPS_FL_ALLOC_TRAMP = 1 << 12, + FTRACE_OPS_FL_IPMODIFY = 1 << 13, }; #ifdef CONFIG_DYNAMIC_FTRACE @@ -310,6 +320,7 @@ bool is_ftrace_trampoline(unsigned long addr); * ENABLED - the function is being traced * REGS - the record wants the function to save regs * REGS_EN - the function is set up to save regs. + * IPMODIFY - the record allows for the IP address to be changed. * * When a new ftrace_ops is registered and wants a function to save * pt_regs, the rec->flag REGS is set. When the function has been @@ -323,10 +334,11 @@ enum { FTRACE_FL_REGS_EN = (1UL << 29), FTRACE_FL_TRAMP = (1UL << 28), FTRACE_FL_TRAMP_EN = (1UL << 27), + FTRACE_FL_IPMODIFY = (1UL << 26), }; -#define FTRACE_REF_MAX_SHIFT 27 -#define FTRACE_FL_BITS 5 +#define FTRACE_REF_MAX_SHIFT 26 +#define FTRACE_FL_BITS 6 #define FTRACE_FL_MASKED_BITS ((1UL << FTRACE_FL_BITS) - 1) #define FTRACE_FL_MASK (FTRACE_FL_MASKED_BITS << FTRACE_REF_MAX_SHIFT) #define FTRACE_REF_MAX ((1UL << FTRACE_REF_MAX_SHIFT) - 1) -- cgit v1.2.3 From 479163f4608214d18bc3266ab6e4b578897a3052 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Thu, 20 Nov 2014 08:13:57 +0000 Subject: mlx5: don't duplicate kvfree() Signed-off-by: Al Viro Acked-by: Eli Cohen Signed-off-by: David S. Miller --- include/linux/mlx5/driver.h | 8 -------- 1 file changed, 8 deletions(-) (limited to 'include/linux') diff --git a/include/linux/mlx5/driver.h b/include/linux/mlx5/driver.h index 246310dc8bef..b1bf41556b32 100644 --- a/include/linux/mlx5/driver.h +++ b/include/linux/mlx5/driver.h @@ -633,14 +633,6 @@ static inline void *mlx5_vzalloc(unsigned long size) return rtn; } -static inline void mlx5_vfree(const void *addr) -{ - if (addr && is_vmalloc_addr(addr)) - vfree(addr); - else - kfree(addr); -} - static inline u32 mlx5_base_mkey(const u32 key) { return key & 0xffffff00u; -- cgit v1.2.3 From 21f7eca555ad14e7c7b2cb59a6c6252e74ee5c8b Mon Sep 17 00:00:00 2001 From: "pang.xunlei" Date: Tue, 18 Nov 2014 19:15:16 +0800 Subject: time: Provide y2038 safe do_settimeofday() replacement The kernel uses 32-bit signed value(time_t) for seconds elapsed 1970-01-01:00:00:00, thus it will overflow at 2038-01-19 03:14:08 on 32-bit systems. This is widely known as the y2038 problem. As part of addressing "y2038 problem" for in-kernel uses, this patch adds safe do_settimeofday64() using timespec64. After this patch, do_settimeofday() is deprecated and all its call sites will be fixed using do_settimeofday64(), after that it can be removed. Signed-off-by: pang.xunlei Signed-off-by: John Stultz --- include/linux/timekeeping.h | 21 ++++++++++++++++++++- 1 file changed, 20 insertions(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/timekeeping.h b/include/linux/timekeeping.h index 1caa6b04fdc5..071ad7e0c981 100644 --- a/include/linux/timekeeping.h +++ b/include/linux/timekeeping.h @@ -10,7 +10,7 @@ extern int timekeeping_suspended; * Get and set timeofday */ extern void do_gettimeofday(struct timeval *tv); -extern int do_settimeofday(const struct timespec *tv); +extern int do_settimeofday64(const struct timespec64 *ts); extern int do_sys_settimeofday(const struct timespec *tv, const struct timezone *tz); @@ -33,6 +33,14 @@ extern int __getnstimeofday64(struct timespec64 *tv); extern void getnstimeofday64(struct timespec64 *tv); #if BITS_PER_LONG == 64 +/** + * Deprecated. Use do_settimeofday64(). + */ +static inline int do_settimeofday(const struct timespec *ts) +{ + return do_settimeofday64(ts); +} + static inline int __getnstimeofday(struct timespec *ts) { return __getnstimeofday64(ts); @@ -54,6 +62,17 @@ static inline void ktime_get_real_ts(struct timespec *ts) } #else +/** + * Deprecated. Use do_settimeofday64(). + */ +static inline int do_settimeofday(const struct timespec *ts) +{ + struct timespec64 ts64; + + ts64 = timespec_to_timespec64(*ts); + return do_settimeofday64(&ts64); +} + static inline int __getnstimeofday(struct timespec *ts) { struct timespec64 ts64; -- cgit v1.2.3 From 04d9089086a8231ddc69a9f3f25e971a3c1d25e6 Mon Sep 17 00:00:00 2001 From: "pang.xunlei" Date: Tue, 18 Nov 2014 19:15:17 +0800 Subject: time: Provide y2038 safe timekeeping_inject_sleeptime() replacement As part of addressing "y2038 problem" for in-kernel uses, this patch adds timekeeping_inject_sleeptime64() using timespec64. After this patch, timekeeping_inject_sleeptime() is deprecated and all its call sites will be fixed using the new interface, after that it can be removed. NOTE: timekeeping_inject_sleeptime() is safe actually, but we want to eliminate timespec eventually, so comes this patch. Signed-off-by: pang.xunlei Signed-off-by: John Stultz --- include/linux/timekeeping.h | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/timekeeping.h b/include/linux/timekeeping.h index 071ad7e0c981..6d76c6502892 100644 --- a/include/linux/timekeeping.h +++ b/include/linux/timekeeping.h @@ -201,7 +201,18 @@ static inline void timekeeping_clocktai(struct timespec *ts) /* * RTC specific */ -extern void timekeeping_inject_sleeptime(struct timespec *delta); +extern void timekeeping_inject_sleeptime64(struct timespec64 *delta); + +/** + * Deprecated. Use timekeeping_inject_sleeptime64(). + */ +static inline void timekeeping_inject_sleeptime(struct timespec *delta) +{ + struct timespec64 delta64; + + delta64 = timespec_to_timespec64(*delta); + timekeeping_inject_sleeptime64(&delta64); +} /* * PPS accessor -- cgit v1.2.3 From 90b6ce9c4066e0b2098dff65e52e6e7df1a51079 Mon Sep 17 00:00:00 2001 From: "pang.xunlei" Date: Tue, 18 Nov 2014 19:15:18 +0800 Subject: time: Provide y2038 safe mktime() replacement As part of addressing "y2038 problem" for in-kernel uses, this patch adds safe mktime64() using time64_t. After this patch, mktime() is deprecated and all its call sites will be fixed using mktime64(), after that it can be removed. Signed-off-by: pang.xunlei Signed-off-by: John Stultz --- include/linux/time.h | 17 ++++++++++++++--- 1 file changed, 14 insertions(+), 3 deletions(-) (limited to 'include/linux') diff --git a/include/linux/time.h b/include/linux/time.h index 8c42cf8d2444..203c2ad40d71 100644 --- a/include/linux/time.h +++ b/include/linux/time.h @@ -39,9 +39,20 @@ static inline int timeval_compare(const struct timeval *lhs, const struct timeva return lhs->tv_usec - rhs->tv_usec; } -extern unsigned long mktime(const unsigned int year, const unsigned int mon, - const unsigned int day, const unsigned int hour, - const unsigned int min, const unsigned int sec); +extern time64_t mktime64(const unsigned int year, const unsigned int mon, + const unsigned int day, const unsigned int hour, + const unsigned int min, const unsigned int sec); + +/** + * Deprecated. Use mktime64(). + */ +static inline unsigned long mktime(const unsigned int year, + const unsigned int mon, const unsigned int day, + const unsigned int hour, const unsigned int min, + const unsigned int sec) +{ + return mktime64(year, mon, day, hour, min, sec); +} extern void set_normalized_timespec(struct timespec *ts, time_t sec, s64 nsec); -- cgit v1.2.3 From cdba2ec538d9843c42cac15ff4ec54dc2ac53f8a Mon Sep 17 00:00:00 2001 From: John Stultz Date: Fri, 7 Nov 2014 11:03:20 -0800 Subject: time: Expose getrawmonotonic64 for in-kernel uses Adds a timespec64 based getrawmonotonic64() implementation that can be used as we convert internal users of getrawmonotonic away from using timespecs. Signed-off-by: John Stultz --- include/linux/timekeeping.h | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/timekeeping.h b/include/linux/timekeeping.h index 6d76c6502892..e40a8d60fb21 100644 --- a/include/linux/timekeeping.h +++ b/include/linux/timekeeping.h @@ -26,7 +26,7 @@ struct timespec __current_kernel_time(void); * timespec based interfaces */ struct timespec get_monotonic_coarse(void); -extern void getrawmonotonic(struct timespec *ts); +extern void getrawmonotonic64(struct timespec64 *ts); extern void ktime_get_ts64(struct timespec64 *ts); extern int __getnstimeofday64(struct timespec64 *tv); @@ -61,6 +61,11 @@ static inline void ktime_get_real_ts(struct timespec *ts) getnstimeofday64(ts); } +static inline void getrawmonotonic(struct timespec *ts) +{ + getrawmonotonic64(ts); +} + #else /** * Deprecated. Use do_settimeofday64(). @@ -105,6 +110,14 @@ static inline void ktime_get_real_ts(struct timespec *ts) getnstimeofday64(&ts64); *ts = timespec64_to_timespec(ts64); } + +static inline void getrawmonotonic(struct timespec *ts) +{ + struct timespec64 ts64; + + getrawmonotonic64(&ts64); + *ts = timespec64_to_timespec(ts64); +} #endif extern void getboottime(struct timespec *ts); -- cgit v1.2.3 From 334334b5f577a2255e29d2352d53197d9b796511 Mon Sep 17 00:00:00 2001 From: John Stultz Date: Fri, 7 Nov 2014 11:20:40 -0800 Subject: time: Expose get_monotonic_coarse64() for in-kernel uses Adds a timespec64 based get_monotonic_coarse64() implementation that can be used as we convert internal users of get_monotonic_coarse away from using timespecs. Signed-off-by: John Stultz --- include/linux/timekeeping.h | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/timekeeping.h b/include/linux/timekeeping.h index e40a8d60fb21..8cab4b754be7 100644 --- a/include/linux/timekeeping.h +++ b/include/linux/timekeeping.h @@ -25,7 +25,7 @@ struct timespec __current_kernel_time(void); /* * timespec based interfaces */ -struct timespec get_monotonic_coarse(void); +struct timespec64 get_monotonic_coarse64(void); extern void getrawmonotonic64(struct timespec64 *ts); extern void ktime_get_ts64(struct timespec64 *ts); @@ -66,6 +66,10 @@ static inline void getrawmonotonic(struct timespec *ts) getrawmonotonic64(ts); } +static inline struct timespec get_monotonic_coarse(void) +{ + return get_monotonic_coarse64(); +} #else /** * Deprecated. Use do_settimeofday64(). @@ -118,6 +122,11 @@ static inline void getrawmonotonic(struct timespec *ts) getrawmonotonic64(&ts64); *ts = timespec64_to_timespec(ts64); } + +static inline struct timespec get_monotonic_coarse(void) +{ + return timespec64_to_timespec(get_monotonic_coarse64()); +} #endif extern void getboottime(struct timespec *ts); -- cgit v1.2.3 From c2c11ae4b6bc03b41720337028b940cbec9e316f Mon Sep 17 00:00:00 2001 From: "pang.xunlei" Date: Tue, 18 Nov 2014 19:15:19 +0800 Subject: rtc/lib: Provide y2038 safe rtc_tm_to_time()/rtc_time_to_tm() replacement As part of addressing "y2038 problem" for in-kernel uses, this patch adds safe rtc_tm_to_time64()/rtc_time64_to_tm() respectively using time64_t. After this patch, rtc_tm_to_time() is deprecated and all its call sites will be fixed using corresponding safe versions, it can be removed when having no users. Also change rtc_tm_to_time64() to return time64_t directly instead of just as a parameter like rtc_tm_to_time() does. After this patch, rtc_time_to_tm() is deprecated and all its call sites will be fixed using corresponding safe versions, it can be removed when having no users. In addition, change rtc_tm_to_ktime() and rtc_ktime_to_tm() to use the safe version in passing. Signed-off-by: pang.xunlei Signed-off-by: John Stultz --- include/linux/rtc.h | 21 +++++++++++++++++++-- 1 file changed, 19 insertions(+), 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/rtc.h b/include/linux/rtc.h index c2c28975293c..6d6be09a2fe5 100644 --- a/include/linux/rtc.h +++ b/include/linux/rtc.h @@ -19,11 +19,28 @@ extern int rtc_month_days(unsigned int month, unsigned int year); extern int rtc_year_days(unsigned int day, unsigned int month, unsigned int year); extern int rtc_valid_tm(struct rtc_time *tm); -extern int rtc_tm_to_time(struct rtc_time *tm, unsigned long *time); -extern void rtc_time_to_tm(unsigned long time, struct rtc_time *tm); +extern time64_t rtc_tm_to_time64(struct rtc_time *tm); +extern void rtc_time64_to_tm(time64_t time, struct rtc_time *tm); ktime_t rtc_tm_to_ktime(struct rtc_time tm); struct rtc_time rtc_ktime_to_tm(ktime_t kt); +/** + * Deprecated. Use rtc_time64_to_tm(). + */ +static inline void rtc_time_to_tm(unsigned long time, struct rtc_time *tm) +{ + rtc_time64_to_tm(time, tm); +} + +/** + * Deprecated. Use rtc_tm_to_time64(). + */ +static inline int rtc_tm_to_time(struct rtc_time *tm, unsigned long *time) +{ + *time = rtc_tm_to_time64(tm); + + return 0; +} #include #include -- cgit v1.2.3 From 21b6c0512e8aca75ce76365e1aef9fb16e007100 Mon Sep 17 00:00:00 2001 From: John Stultz Date: Thu, 20 Nov 2014 21:19:15 -0800 Subject: time: Remove timekeeping_inject_sleeptime() Since all users have been converted to using the 64bit timekeeping_inject_sleeptime64(), remove the old y2038 problematic timekeeping_inject_sleeptime(). Signed-off-by: John Stultz --- include/linux/timekeeping.h | 11 ----------- 1 file changed, 11 deletions(-) (limited to 'include/linux') diff --git a/include/linux/timekeeping.h b/include/linux/timekeeping.h index 8cab4b754be7..961fea373f83 100644 --- a/include/linux/timekeeping.h +++ b/include/linux/timekeeping.h @@ -225,17 +225,6 @@ static inline void timekeeping_clocktai(struct timespec *ts) */ extern void timekeeping_inject_sleeptime64(struct timespec64 *delta); -/** - * Deprecated. Use timekeeping_inject_sleeptime64(). - */ -static inline void timekeeping_inject_sleeptime(struct timespec *delta) -{ - struct timespec64 delta64; - - delta64 = timespec_to_timespec64(*delta); - timekeeping_inject_sleeptime64(&delta64); -} - /* * PPS accessor */ -- cgit v1.2.3 From dbc98635e0d42f0e62ea92813df1e0e4c90f8375 Mon Sep 17 00:00:00 2001 From: Heikki Krogerus Date: Wed, 19 Nov 2014 17:28:21 +0200 Subject: phy: remove the old lookup method The users of the old method are now converted to the new one. Signed-off-by: Heikki Krogerus [ kishon@ti.com : made phy-berlin-usb.c and phy-miphy28lp.c to use the updated devm_phy_create API.] Signed-off-by: Kishon Vijay Abraham I --- include/linux/phy/phy.h | 38 ++++---------------------------------- 1 file changed, 4 insertions(+), 34 deletions(-) (limited to 'include/linux') diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h index 849284e5873f..a0197fa1b116 100644 --- a/include/linux/phy/phy.h +++ b/include/linux/phy/phy.h @@ -61,7 +61,6 @@ struct phy { struct device dev; int id; const struct phy_ops *ops; - struct phy_init_data *init_data; struct mutex mutex; int init_count; int power_count; @@ -84,32 +83,6 @@ struct phy_provider { struct of_phandle_args *args); }; -/** - * struct phy_consumer - represents the phy consumer - * @dev_name: the device name of the controller that will use this PHY device - * @port: name given to the consumer port - */ -struct phy_consumer { - const char *dev_name; - const char *port; -}; - -/** - * struct phy_init_data - contains the list of PHY consumers - * @num_consumers: number of consumers for this PHY device - * @consumers: list of PHY consumers - */ -struct phy_init_data { - unsigned int num_consumers; - struct phy_consumer *consumers; -}; - -#define PHY_CONSUMER(_dev_name, _port) \ -{ \ - .dev_name = _dev_name, \ - .port = _port, \ -} - struct phy_lookup { struct list_head node; const char *dev_id; @@ -166,10 +139,9 @@ struct phy *of_phy_get(struct device_node *np, const char *con_id); struct phy *of_phy_simple_xlate(struct device *dev, struct of_phandle_args *args); struct phy *phy_create(struct device *dev, struct device_node *node, - const struct phy_ops *ops, - struct phy_init_data *init_data); + const struct phy_ops *ops); struct phy *devm_phy_create(struct device *dev, struct device_node *node, - const struct phy_ops *ops, struct phy_init_data *init_data); + const struct phy_ops *ops); void phy_destroy(struct phy *phy); void devm_phy_destroy(struct device *dev, struct phy *phy); struct phy_provider *__of_phy_provider_register(struct device *dev, @@ -310,16 +282,14 @@ static inline struct phy *of_phy_simple_xlate(struct device *dev, static inline struct phy *phy_create(struct device *dev, struct device_node *node, - const struct phy_ops *ops, - struct phy_init_data *init_data) + const struct phy_ops *ops) { return ERR_PTR(-ENOSYS); } static inline struct phy *devm_phy_create(struct device *dev, struct device_node *node, - const struct phy_ops *ops, - struct phy_init_data *init_data) + const struct phy_ops *ops) { return ERR_PTR(-ENOSYS); } -- cgit v1.2.3 From eadac03e898617521f327faf265932b73ecc3e0f Mon Sep 17 00:00:00 2001 From: Pranith Kumar Date: Fri, 21 Nov 2014 10:05:59 -0500 Subject: percpu: Replace smp_read_barrier_depends() with lockless_dereference() Recently lockless_dereference() was added which can be used in place of hard-coding smp_read_barrier_depends(). The following PATCH makes the change. Signed-off-by: Pranith Kumar Signed-off-by: Tejun Heo --- include/linux/percpu-refcount.h | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) (limited to 'include/linux') diff --git a/include/linux/percpu-refcount.h b/include/linux/percpu-refcount.h index d5c89e0dd0e6..6b0c81872142 100644 --- a/include/linux/percpu-refcount.h +++ b/include/linux/percpu-refcount.h @@ -128,10 +128,8 @@ static inline void percpu_ref_kill(struct percpu_ref *ref) static inline bool __ref_is_percpu(struct percpu_ref *ref, unsigned long __percpu **percpu_countp) { - unsigned long percpu_ptr = ACCESS_ONCE(ref->percpu_count_ptr); - /* paired with smp_store_release() in percpu_ref_reinit() */ - smp_read_barrier_depends(); + unsigned long percpu_ptr = lockless_dereference(ref->percpu_count_ptr); if (unlikely(percpu_ptr & __PERCPU_REF_ATOMIC)) return false; -- cgit v1.2.3 From 891d4a48f7da39de2be17a59b47df62dccf0f3d5 Mon Sep 17 00:00:00 2001 From: Jiang Liu Date: Sun, 9 Nov 2014 23:10:33 +0800 Subject: PCI/MSI: Rename __read_msi_msg() to __pci_read_msi_msg() Rename __read_msi_msg() to __pci_read_msi_msg() and kill unused read_msi_msg(). It's a preparation to separate generic MSI code from PCI core. Signed-off-by: Jiang Liu Cc: Bjorn Helgaas Cc: Grant Likely Cc: Marc Zyngier Cc: Yingjoe Chen Cc: Yijing Wang Signed-off-by: Thomas Gleixner --- include/linux/msi.h | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/msi.h b/include/linux/msi.h index 6704991b0174..f36c37b46f10 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -16,12 +16,11 @@ struct irq_data; struct msi_desc; void mask_msi_irq(struct irq_data *data); void unmask_msi_irq(struct irq_data *data); -void __read_msi_msg(struct msi_desc *entry, struct msi_msg *msg); void __get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg); void __write_msi_msg(struct msi_desc *entry, struct msi_msg *msg); -void read_msi_msg(unsigned int irq, struct msi_msg *msg); void get_cached_msi_msg(unsigned int irq, struct msi_msg *msg); void write_msi_msg(unsigned int irq, struct msi_msg *msg); + u32 __msix_mask_irq(struct msi_desc *desc, u32 flag); u32 __msi_mask_irq(struct msi_desc *desc, u32 mask, u32 flag); @@ -51,6 +50,8 @@ struct msi_desc { struct msi_msg msg; }; +void __pci_read_msi_msg(struct msi_desc *entry, struct msi_msg *msg); + /* * The arch hooks to setup up msi irqs. Those functions are * implemented as weak symbols so that they /can/ be overriden by -- cgit v1.2.3 From 83a18912b0e8d275001bca6fc9c0fe519d98f280 Mon Sep 17 00:00:00 2001 From: Jiang Liu Date: Sun, 9 Nov 2014 23:10:34 +0800 Subject: PCI/MSI: Rename write_msi_msg() to pci_write_msi_msg() Rename write_msi_msg() to pci_write_msi_msg() to mark it as PCI specific. Signed-off-by: Jiang Liu Cc: Bjorn Helgaas Cc: Grant Likely Cc: Marc Zyngier Cc: Yingjoe Chen Cc: Yijing Wang Signed-off-by: Thomas Gleixner --- include/linux/msi.h | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/msi.h b/include/linux/msi.h index f36c37b46f10..301adecbc34d 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -17,9 +17,7 @@ struct msi_desc; void mask_msi_irq(struct irq_data *data); void unmask_msi_irq(struct irq_data *data); void __get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg); -void __write_msi_msg(struct msi_desc *entry, struct msi_msg *msg); void get_cached_msi_msg(unsigned int irq, struct msi_msg *msg); -void write_msi_msg(unsigned int irq, struct msi_msg *msg); u32 __msix_mask_irq(struct msi_desc *desc, u32 flag); u32 __msi_mask_irq(struct msi_desc *desc, u32 mask, u32 flag); @@ -51,6 +49,18 @@ struct msi_desc { }; void __pci_read_msi_msg(struct msi_desc *entry, struct msi_msg *msg); +void __pci_write_msi_msg(struct msi_desc *entry, struct msi_msg *msg); +void pci_write_msi_msg(unsigned int irq, struct msi_msg *msg); + +/* Conversion helpers. Should be removed after merging */ +static inline void __write_msi_msg(struct msi_desc *entry, struct msi_msg *msg) +{ + __pci_write_msi_msg(entry, msg); +} +static inline void write_msi_msg(int irq, struct msi_msg *msg) +{ + pci_write_msi_msg(irq, msg); +} /* * The arch hooks to setup up msi irqs. Those functions are -- cgit v1.2.3 From 23ed8d57f3b87520e045ba0e3a2340638b31198a Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Sun, 23 Nov 2014 11:55:58 +0100 Subject: PCI/MSI: Rename mask/unmask_msi_irq et al mask/unmask_msi_irq and __mask_msi/msix_irq are PCI/MSI specific functions and should be named accordingly. This is a preparatory patch to support MSI on non PCI devices. Rename mask/unmask_msi_irq to pci_msi_mask/unmask_irq and document the functions. Provide conversion helpers. Rename __mask_msi/msix_irq to __pci_msi/msix_desc_mask so its clear that they operated on msi_desc. Fixup the only user outside of pci/msi. Signed-off-by: Thomas Gleixner Cc: Bjorn Helgaas Cc: Jiang Liu Cc: Grant Likely Cc: Marc Zyngier Cc: Yijing Wang Cc: Heiko Carstens --- include/linux/msi.h | 18 +++++++++++++----- 1 file changed, 13 insertions(+), 5 deletions(-) (limited to 'include/linux') diff --git a/include/linux/msi.h b/include/linux/msi.h index 301adecbc34d..1dcad0c1e806 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -14,14 +14,9 @@ extern int pci_msi_ignore_mask; /* Helper functions */ struct irq_data; struct msi_desc; -void mask_msi_irq(struct irq_data *data); -void unmask_msi_irq(struct irq_data *data); void __get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg); void get_cached_msi_msg(unsigned int irq, struct msi_msg *msg); -u32 __msix_mask_irq(struct msi_desc *desc, u32 flag); -u32 __msi_mask_irq(struct msi_desc *desc, u32 mask, u32 flag); - struct msi_desc { struct { __u8 is_msix : 1; @@ -52,6 +47,11 @@ void __pci_read_msi_msg(struct msi_desc *entry, struct msi_msg *msg); void __pci_write_msi_msg(struct msi_desc *entry, struct msi_msg *msg); void pci_write_msi_msg(unsigned int irq, struct msi_msg *msg); +u32 __pci_msix_desc_mask_irq(struct msi_desc *desc, u32 flag); +u32 __pci_msi_desc_mask_irq(struct msi_desc *desc, u32 mask, u32 flag); +void pci_msi_mask_irq(struct irq_data *data); +void pci_msi_unmask_irq(struct irq_data *data); + /* Conversion helpers. Should be removed after merging */ static inline void __write_msi_msg(struct msi_desc *entry, struct msi_msg *msg) { @@ -61,6 +61,14 @@ static inline void write_msi_msg(int irq, struct msi_msg *msg) { pci_write_msi_msg(irq, msg); } +static inline void mask_msi_irq(struct irq_data *data) +{ + pci_msi_mask_irq(data); +} +static inline void unmask_msi_irq(struct irq_data *data) +{ + pci_msi_unmask_irq(data); +} /* * The arch hooks to setup up msi irqs. Those functions are -- cgit v1.2.3 From d31eb342409b24e3d2e1989c775f3361e93acc08 Mon Sep 17 00:00:00 2001 From: Jiang Liu Date: Sat, 15 Nov 2014 22:24:03 +0800 Subject: PCI/MSI: Introduce helpers to hide struct msi_desc implementation details Introduce helpers to hide struct msi_desc implementation details, so we could easily support non-PCI-compliant MSI devices later by moving msi_list into struct device. Signed-off-by: Jiang Liu Cc: Tony Luck Cc: linux-arm-kernel@lists.infradead.org Cc: Bjorn Helgaas Cc: Grant Likely Cc: Marc Zyngier Cc: Yijing Wang Cc: Yingjoe Chen Cc: Borislav Petkov Cc: Matthias Brugger Cc: Alexander Gordeev Link: http://lkml.kernel.org/r/1416061447-9472-6-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Thomas Gleixner --- include/linux/msi.h | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) (limited to 'include/linux') diff --git a/include/linux/msi.h b/include/linux/msi.h index 1dcad0c1e806..e0d08517bd3d 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -43,6 +43,25 @@ struct msi_desc { struct msi_msg msg; }; +/* Helpers to hide struct msi_desc implementation details */ +#define msi_desc_to_dev(desc) (&(desc)->dev.dev) +#define dev_to_msi_list(dev) (&to_pci_dev((dev))->msi_list) +#define first_msi_entry(dev) \ + list_first_entry(dev_to_msi_list((dev)), struct msi_desc, list) +#define for_each_msi_entry(desc, dev) \ + list_for_each_entry((desc), dev_to_msi_list((dev)), list) + +#ifdef CONFIG_PCI_MSI +#define first_pci_msi_entry(pdev) first_msi_entry(&(pdev)->dev) +#define for_each_pci_msi_entry(desc, pdev) \ + for_each_msi_entry((desc), &(pdev)->dev) + +static inline struct pci_dev *msi_desc_to_pci_dev(struct msi_desc *desc) +{ + return desc->dev; +} +#endif /* CONFIG_PCI_MSI */ + void __pci_read_msi_msg(struct msi_desc *entry, struct msi_msg *msg); void __pci_write_msi_msg(struct msi_desc *entry, struct msi_msg *msg); void pci_write_msi_msg(unsigned int irq, struct msi_msg *msg); -- cgit v1.2.3 From f8264e34965aaf43203912ed8f7b543c00c8d70f Mon Sep 17 00:00:00 2001 From: Jiang Liu Date: Thu, 6 Nov 2014 22:20:14 +0800 Subject: irqdomain: Introduce new interfaces to support hierarchy irqdomains We plan to use hierarchy irqdomain to suppport CPU vector assignment, interrupt remapping controller, IO-APIC controller, MSI interrupt and hypertransport interrupt etc on x86 platforms. So extend irqdomain interfaces to support hierarchy irqdomain. There are already many clients of current irqdomain interfaces. To minimize the changes, we choose to introduce new version 2 interfaces to support hierarchy instead of extending existing irqdomain interfaces. According to Thomas's suggestion, the most important design decision is to build hierarchy struct irq_data to support hierarchy irqdomain, so hierarchy irqdomain related data could be saved in struct irq_data. With support of hierarchy irq_data, we could also support stacked irq_chips. This is most useful in case of set_affinity(). The new hierarchy irqdomain introduces following interfaces: 1) irq_domain_alloc_irqs()/irq_domain_free_irqs(): allocate/release IRQ and related resources. 2) __irq_domain_alloc_irqs(): a special version to support legacy IRQs. 3) irq_domain_activate_irq()/irq_domain_deactivate_irq(): program interrupt controllers to activate/deactivate interrupt. There are also several help functions to ease irqdomain implemenations: 1) irq_domain_get_irq_data(): get irq_data associated with a specific irqdomain. 2) irq_domain_set_hwirq_and_chip(): save irqdomain specific data into irq_data. 3) irq_domain_alloc_irqs_parent()/irq_domain_free_irqs_parent(): invoke parent irqdomain's alloc/free callbacks. We also changed irq_startup()/irq_shutdown() to invoke irq_domain_activate_irq()/irq_domain_deactivate_irq() to program interrupt controller when start/stop interrupts. [ tglx: Folded parts of the later patch series in ] Signed-off-by: Jiang Liu Cc: Bjorn Helgaas Cc: Grant Likely Cc: Marc Zyngier Cc: Yingjoe Chen Cc: Yijing Wang Signed-off-by: Thomas Gleixner --- include/linux/irq.h | 5 +++ include/linux/irqdomain.h | 98 +++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 103 insertions(+) (limited to 'include/linux') diff --git a/include/linux/irq.h b/include/linux/irq.h index 03f48d936f66..13ba412ce3a0 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -133,6 +133,8 @@ struct irq_domain; * @chip: low level interrupt hardware access * @domain: Interrupt translation domain; responsible for mapping * between hwirq number and linux irq number. + * @parent_data: pointer to parent struct irq_data to support hierarchy + * irq_domain * @handler_data: per-IRQ data for the irq_chip methods * @chip_data: platform-specific per-chip private data for the chip * methods, to allow shared chip implementations @@ -151,6 +153,9 @@ struct irq_data { unsigned int state_use_accessors; struct irq_chip *chip; struct irq_domain *domain; +#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY + struct irq_data *parent_data; +#endif void *handler_data; void *chip_data; struct msi_desc *msi_desc; diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h index b0f9d16e48f6..f8563dcfd254 100644 --- a/include/linux/irqdomain.h +++ b/include/linux/irqdomain.h @@ -38,6 +38,8 @@ struct device_node; struct irq_domain; struct of_device_id; +struct irq_chip; +struct irq_data; /* Number of irqs reserved for a legacy isa controller */ #define NUM_ISA_INTERRUPTS 16 @@ -64,6 +66,16 @@ struct irq_domain_ops { int (*xlate)(struct irq_domain *d, struct device_node *node, const u32 *intspec, unsigned int intsize, unsigned long *out_hwirq, unsigned int *out_type); + +#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY + /* extended V2 interfaces to support hierarchy irq_domains */ + int (*alloc)(struct irq_domain *d, unsigned int virq, + unsigned int nr_irqs, void *arg); + void (*free)(struct irq_domain *d, unsigned int virq, + unsigned int nr_irqs); + void (*activate)(struct irq_domain *d, struct irq_data *irq_data); + void (*deactivate)(struct irq_domain *d, struct irq_data *irq_data); +#endif }; extern struct irq_domain_ops irq_generic_chip_ops; @@ -77,6 +89,7 @@ struct irq_domain_chip_generic; * @ops: pointer to irq_domain methods * @host_data: private data pointer for use by owner. Not touched by irq_domain * core code. + * @flags: host per irq_domain flags * * Optional elements * @of_node: Pointer to device tree nodes associated with the irq_domain. Used @@ -84,6 +97,7 @@ struct irq_domain_chip_generic; * @gc: Pointer to a list of generic chips. There is a helper function for * setting up one or more generic chips for interrupt controllers * drivers using the generic chip library which uses this pointer. + * @parent: Pointer to parent irq_domain to support hierarchy irq_domains * * Revmap data, used internally by irq_domain * @revmap_direct_max_irq: The largest hwirq that can be set for controllers that @@ -97,10 +111,14 @@ struct irq_domain { const char *name; const struct irq_domain_ops *ops; void *host_data; + unsigned int flags; /* Optional data */ struct device_node *of_node; struct irq_domain_chip_generic *gc; +#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY + struct irq_domain *parent; +#endif /* reverse map data. The linear map gets appended to the irq_domain */ irq_hw_number_t hwirq_max; @@ -110,6 +128,19 @@ struct irq_domain { unsigned int linear_revmap[]; }; +/* Irq domain flags */ +enum { + /* Irq domain is hierarchical */ + IRQ_DOMAIN_FLAG_HIERARCHY = (1 << 0), + + /* + * Flags starting from IRQ_DOMAIN_FLAG_NONCORE are reserved + * for implementation specific purposes and ignored by the + * core code. + */ + IRQ_DOMAIN_FLAG_NONCORE = (1 << 16), +}; + #ifdef CONFIG_IRQ_DOMAIN struct irq_domain *__irq_domain_add(struct device_node *of_node, int size, irq_hw_number_t hwirq_max, int direct_max, @@ -220,8 +251,75 @@ int irq_domain_xlate_onetwocell(struct irq_domain *d, struct device_node *ctrlr, const u32 *intspec, unsigned int intsize, irq_hw_number_t *out_hwirq, unsigned int *out_type); +/* V2 interfaces to support hierarchy IRQ domains. */ +extern struct irq_data *irq_domain_get_irq_data(struct irq_domain *domain, + unsigned int virq); +#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY +extern int __irq_domain_alloc_irqs(struct irq_domain *domain, int irq_base, + unsigned int nr_irqs, int node, void *arg, + bool realloc); +extern void irq_domain_free_irqs(unsigned int virq, unsigned int nr_irqs); +extern void irq_domain_activate_irq(struct irq_data *irq_data); +extern void irq_domain_deactivate_irq(struct irq_data *irq_data); + +static inline int irq_domain_alloc_irqs(struct irq_domain *domain, + unsigned int nr_irqs, int node, void *arg) +{ + return __irq_domain_alloc_irqs(domain, -1, nr_irqs, node, arg, false); +} + +extern int irq_domain_set_hwirq_and_chip(struct irq_domain *domain, + unsigned int virq, + irq_hw_number_t hwirq, + struct irq_chip *chip, + void *chip_data); +extern void irq_domain_reset_irq_data(struct irq_data *irq_data); +extern void irq_domain_free_irqs_common(struct irq_domain *domain, + unsigned int virq, + unsigned int nr_irqs); +extern void irq_domain_free_irqs_top(struct irq_domain *domain, + unsigned int virq, unsigned int nr_irqs); + +static inline int irq_domain_alloc_irqs_parent(struct irq_domain *domain, + unsigned int irq_base, + unsigned int nr_irqs, void *arg) +{ + if (domain->parent && domain->parent->ops->alloc) + return domain->parent->ops->alloc(domain->parent, irq_base, + nr_irqs, arg); + return -ENOSYS; +} + +static inline void irq_domain_free_irqs_parent(struct irq_domain *domain, + unsigned int irq_base, unsigned int nr_irqs) +{ + if (domain->parent && domain->parent->ops->free) + domain->parent->ops->free(domain->parent, irq_base, nr_irqs); +} + +static inline bool irq_domain_is_hierarchy(struct irq_domain *domain) +{ + return domain->flags & IRQ_DOMAIN_FLAG_HIERARCHY; +} +#else /* CONFIG_IRQ_DOMAIN_HIERARCHY */ +static inline void irq_domain_activate_irq(struct irq_data *data) { } +static inline void irq_domain_deactivate_irq(struct irq_data *data) { } +static inline int irq_domain_alloc_irqs(struct irq_domain *domain, + unsigned int nr_irqs, int node, void *arg) +{ + return -1; +} + +static inline bool irq_domain_is_hierarchy(struct irq_domain *domain) +{ + return false; +} +#endif /* CONFIG_IRQ_DOMAIN_HIERARCHY */ + #else /* CONFIG_IRQ_DOMAIN */ static inline void irq_dispose_mapping(unsigned int virq) { } +static inline void irq_domain_activate_irq(struct irq_data *data) { } +static inline void irq_domain_deactivate_irq(struct irq_data *data) { } #endif /* !CONFIG_IRQ_DOMAIN */ #endif /* _LINUX_IRQDOMAIN_H */ -- cgit v1.2.3 From 85f08c17de26f117be6ca7aa260d2ec02a2248ba Mon Sep 17 00:00:00 2001 From: Jiang Liu Date: Thu, 6 Nov 2014 22:20:16 +0800 Subject: genirq: Introduce helper functions to support stacked irq_chip Now we already support hierarchy irq_data, so introduce several helpers to support stacked irq_chips. Signed-off-by: Jiang Liu Cc: Bjorn Helgaas Cc: Grant Likely Cc: Marc Zyngier Cc: Yingjoe Chen Cc: Yijing Wang Signed-off-by: Thomas Gleixner --- include/linux/irq.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include/linux') diff --git a/include/linux/irq.h b/include/linux/irq.h index 13ba412ce3a0..0adcbbbf2e87 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -443,6 +443,11 @@ extern void handle_percpu_devid_irq(unsigned int irq, struct irq_desc *desc); extern void handle_bad_irq(unsigned int irq, struct irq_desc *desc); extern void handle_nested_irq(unsigned int irq); +#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY +extern void irq_chip_ack_parent(struct irq_data *data); +extern int irq_chip_retrigger_hierarchy(struct irq_data *data); +#endif + /* Handling of unhandled and spurious interrupts: */ extern void note_interrupt(unsigned int irq, struct irq_desc *desc, irqreturn_t action_ret); -- cgit v1.2.3 From 56e8abab615e0c5858cfb9fa0015a44641762b9d Mon Sep 17 00:00:00 2001 From: Yingjoe Chen Date: Thu, 13 Nov 2014 23:37:05 +0800 Subject: genirq: Add more helper functions to support stacked irq_chip Add more helper function for stacked irq_chip to just call parent's function. Signed-off-by: Yingjoe Chen Cc: Rob Herring Cc: Pawel Moll Cc: Mark Rutland Cc: Matthias Brugger Cc: Russell King Cc: Jason Cooper Cc: Gran Likely Cc: Boris BREZILLON Cc: Cc: Bjorn Helgaas Cc: Yijing Wang Cc: Cc: Cc: Cc: Cc: Cc: Cc: Sascha Hauer Cc: Jiang Liu Cc: Marc Zyngier Link: http://lkml.kernel.org/r/1415893029-2971-3-git-send-email-yingjoe.chen@mediatek.com Signed-off-by: Thomas Gleixner --- include/linux/irq.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'include/linux') diff --git a/include/linux/irq.h b/include/linux/irq.h index 0adcbbbf2e87..fad4bf6f15f6 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -446,6 +446,12 @@ extern void handle_nested_irq(unsigned int irq); #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY extern void irq_chip_ack_parent(struct irq_data *data); extern int irq_chip_retrigger_hierarchy(struct irq_data *data); +extern void irq_chip_mask_parent(struct irq_data *data); +extern void irq_chip_unmask_parent(struct irq_data *data); +extern void irq_chip_eoi_parent(struct irq_data *data); +extern int irq_chip_set_affinity_parent(struct irq_data *data, + const struct cpumask *dest, + bool force); #endif /* Handling of unhandled and spurious interrupts: */ -- cgit v1.2.3 From 515085ef7ee74694bc9b02bc45196452defad59a Mon Sep 17 00:00:00 2001 From: Jiang Liu Date: Thu, 6 Nov 2014 22:20:17 +0800 Subject: genirq: Introduce irq_chip.irq_compose_msi_msg() to support stacked irqchip Add callback irq_compose_msi_msg to struct irq_chip, which will be used to support stacked irqchip. Signed-off-by: Jiang Liu Cc: Bjorn Helgaas Cc: Grant Likely Cc: Marc Zyngier Cc: Yingjoe Chen Cc: Yijing Wang Signed-off-by: Thomas Gleixner --- include/linux/irq.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include/linux') diff --git a/include/linux/irq.h b/include/linux/irq.h index fad4bf6f15f6..d58e58935465 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -29,6 +29,7 @@ struct seq_file; struct module; struct irq_desc; struct irq_data; +struct msi_msg; typedef void (*irq_flow_handler_t)(unsigned int irq, struct irq_desc *desc); typedef void (*irq_preflow_handler_t)(struct irq_data *data); @@ -320,6 +321,7 @@ static inline irq_hw_number_t irqd_to_hwirq(struct irq_data *d) * any other callback related to this irq * @irq_release_resources: optional to release resources acquired with * irq_request_resources + * @irq_compose_msi_msg: optional to compose message content for MSI * @flags: chip specific flags */ struct irq_chip { @@ -356,6 +358,8 @@ struct irq_chip { int (*irq_request_resources)(struct irq_data *data); void (*irq_release_resources)(struct irq_data *data); + void (*irq_compose_msi_msg)(struct irq_data *data, struct msi_msg *msg); + unsigned long flags; }; @@ -443,6 +447,7 @@ extern void handle_percpu_devid_irq(unsigned int irq, struct irq_desc *desc); extern void handle_bad_irq(unsigned int irq, struct irq_desc *desc); extern void handle_nested_irq(unsigned int irq); +extern int irq_chip_compose_msi_msg(struct irq_data *data, struct msi_msg *msg); #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY extern void irq_chip_ack_parent(struct irq_data *data); extern int irq_chip_retrigger_hierarchy(struct irq_data *data); -- cgit v1.2.3 From 2cb625478f8cea0f72b565007a35e1eb7882ac3a Mon Sep 17 00:00:00 2001 From: Jiang Liu Date: Thu, 6 Nov 2014 22:20:18 +0800 Subject: genirq: Add IRQ_SET_MASK_OK_DONE to support stacked irqchip Add IRQ_SET_MASK_OK_DONE in addition to IRQ_SET_MASK_OK and IRQ_SET_MASK_OK_NOCOPY to support stacked irqchip. IRQ_SET_MASK_OK_DONE is the same as IRQ_SET_MASK_OK to irq core. To stacked irqchip, it means that ascendant irqchips have done all the work and no more handling needed in descendant irqchips. Signed-off-by: Jiang Liu Cc: Bjorn Helgaas Cc: Grant Likely Cc: Marc Zyngier Cc: Yingjoe Chen Cc: Yijing Wang Signed-off-by: Thomas Gleixner --- include/linux/irq.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include/linux') diff --git a/include/linux/irq.h b/include/linux/irq.h index d58e58935465..566b1e541323 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -114,10 +114,14 @@ enum { * * IRQ_SET_MASK_OK - OK, core updates irq_data.affinity * IRQ_SET_MASK_NOCPY - OK, chip did update irq_data.affinity + * IRQ_SET_MASK_OK_DONE - Same as IRQ_SET_MASK_OK for core. Special code to + * support stacked irqchips, which indicates skipping + * all descendent irqchips. */ enum { IRQ_SET_MASK_OK = 0, IRQ_SET_MASK_OK_NOCOPY, + IRQ_SET_MASK_OK_DONE, }; struct msi_desc; -- cgit v1.2.3 From 75ffc0075007ca649131a2c42863ce6995d9bf80 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 11 Nov 2014 21:58:34 +0100 Subject: genirq: Split out flow handler typedefs into seperate header file Required to avoid circular include dependencies. Signed-off-by: Thomas Gleixner --- include/linux/irq.h | 6 +----- include/linux/irqhandler.h | 14 ++++++++++++++ 2 files changed, 15 insertions(+), 5 deletions(-) create mode 100644 include/linux/irqhandler.h (limited to 'include/linux') diff --git a/include/linux/irq.h b/include/linux/irq.h index 566b1e541323..677482bd8b92 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -15,6 +15,7 @@ #include #include #include +#include #include #include #include @@ -27,12 +28,7 @@ struct seq_file; struct module; -struct irq_desc; -struct irq_data; struct msi_msg; -typedef void (*irq_flow_handler_t)(unsigned int irq, - struct irq_desc *desc); -typedef void (*irq_preflow_handler_t)(struct irq_data *data); /* * IRQ line status. diff --git a/include/linux/irqhandler.h b/include/linux/irqhandler.h new file mode 100644 index 000000000000..62d543004197 --- /dev/null +++ b/include/linux/irqhandler.h @@ -0,0 +1,14 @@ +#ifndef _LINUX_IRQHANDLER_H +#define _LINUX_IRQHANDLER_H + +/* + * Interrupt flow handler typedefs are defined here to avoid circular + * include dependencies. + */ + +struct irq_desc; +struct irq_data; +typedef void (*irq_flow_handler_t)(unsigned int irq, struct irq_desc *desc); +typedef void (*irq_preflow_handler_t)(struct irq_data *data); + +#endif -- cgit v1.2.3 From 1b5377087cb4e68d719a875120894fddfbcbf0f9 Mon Sep 17 00:00:00 2001 From: Jiang Liu Date: Sun, 9 Nov 2014 23:10:24 +0800 Subject: genirq: Introduce helper irq_domain_set_info() to reduce duplicated code Signed-off-by: Jiang Liu Cc: Bjorn Helgaas Cc: Grant Likely Cc: Marc Zyngier Cc: Yingjoe Chen Cc: Yijing Wang Signed-off-by: Thomas Gleixner --- include/linux/irqdomain.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include/linux') diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h index f8563dcfd254..7aca1adb68a1 100644 --- a/include/linux/irqdomain.h +++ b/include/linux/irqdomain.h @@ -33,6 +33,7 @@ #define _LINUX_IRQDOMAIN_H #include +#include #include struct device_node; @@ -273,6 +274,10 @@ extern int irq_domain_set_hwirq_and_chip(struct irq_domain *domain, irq_hw_number_t hwirq, struct irq_chip *chip, void *chip_data); +extern void irq_domain_set_info(struct irq_domain *domain, unsigned int virq, + irq_hw_number_t hwirq, struct irq_chip *chip, + void *chip_data, irq_flow_handler_t handler, + void *handler_data, const char *handler_name); extern void irq_domain_reset_irq_data(struct irq_data *irq_data); extern void irq_domain_free_irqs_common(struct irq_domain *domain, unsigned int virq, -- cgit v1.2.3 From 36d727310cb9f85efb5ac089ffb1797e7c3538e1 Mon Sep 17 00:00:00 2001 From: Jiang Liu Date: Sat, 15 Nov 2014 22:24:01 +0800 Subject: irqdomain: Implement a method to automatically call parent domains alloc/free Add a flags to irq_domain.flags to control whether the irqdomain core should automatically call parent irqdomain's alloc/free callbacks. It help to reduce hierarchy irqdomains users' code size. Signed-off-by: Jiang Liu Cc: Tony Luck Cc: linux-arm-kernel@lists.infradead.org Cc: Bjorn Helgaas Cc: Grant Likely Cc: Marc Zyngier Cc: Yijing Wang Cc: Yingjoe Chen Cc: Borislav Petkov Cc: Benjamin Herrenschmidt Cc: Matthias Brugger Link: http://lkml.kernel.org/r/1416061447-9472-4-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Thomas Gleixner --- include/linux/irqdomain.h | 24 +++++++++--------------- 1 file changed, 9 insertions(+), 15 deletions(-) (limited to 'include/linux') diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h index 7aca1adb68a1..dd2709bdad56 100644 --- a/include/linux/irqdomain.h +++ b/include/linux/irqdomain.h @@ -134,6 +134,9 @@ enum { /* Irq domain is hierarchical */ IRQ_DOMAIN_FLAG_HIERARCHY = (1 << 0), + /* Core calls alloc/free recursive through the domain hierarchy. */ + IRQ_DOMAIN_FLAG_AUTO_RECURSIVE = (1 << 1), + /* * Flags starting from IRQ_DOMAIN_FLAG_NONCORE are reserved * for implementation specific purposes and ignored by the @@ -285,22 +288,13 @@ extern void irq_domain_free_irqs_common(struct irq_domain *domain, extern void irq_domain_free_irqs_top(struct irq_domain *domain, unsigned int virq, unsigned int nr_irqs); -static inline int irq_domain_alloc_irqs_parent(struct irq_domain *domain, - unsigned int irq_base, - unsigned int nr_irqs, void *arg) -{ - if (domain->parent && domain->parent->ops->alloc) - return domain->parent->ops->alloc(domain->parent, irq_base, - nr_irqs, arg); - return -ENOSYS; -} +extern int irq_domain_alloc_irqs_parent(struct irq_domain *domain, + unsigned int irq_base, + unsigned int nr_irqs, void *arg); -static inline void irq_domain_free_irqs_parent(struct irq_domain *domain, - unsigned int irq_base, unsigned int nr_irqs) -{ - if (domain->parent && domain->parent->ops->free) - domain->parent->ops->free(domain->parent, irq_base, nr_irqs); -} +extern void irq_domain_free_irqs_parent(struct irq_domain *domain, + unsigned int irq_base, + unsigned int nr_irqs); static inline bool irq_domain_is_hierarchy(struct irq_domain *domain) { -- cgit v1.2.3 From afb7da83b9f476728623130703acb553d7c7c4d9 Mon Sep 17 00:00:00 2001 From: Jiang Liu Date: Sat, 15 Nov 2014 22:24:02 +0800 Subject: irqdomain: Introduce helper function irq_domain_add_hierarchy() Introduce helper function irq_domain_add_hierarchy(), which creates a linear irqdomain if parameter 'size' is not zero, otherwise creates a tree irqdomain. Signed-off-by: Jiang Liu Cc: Tony Luck Cc: linux-arm-kernel@lists.infradead.org Cc: Bjorn Helgaas Cc: Grant Likely Cc: Marc Zyngier Cc: Yijing Wang Cc: Yingjoe Chen Cc: Borislav Petkov Cc: Benjamin Herrenschmidt Cc: Matthias Brugger Link: http://lkml.kernel.org/r/1416061447-9472-5-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Thomas Gleixner --- include/linux/irqdomain.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include/linux') diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h index dd2709bdad56..676d7306a360 100644 --- a/include/linux/irqdomain.h +++ b/include/linux/irqdomain.h @@ -259,6 +259,10 @@ int irq_domain_xlate_onetwocell(struct irq_domain *d, struct device_node *ctrlr, extern struct irq_data *irq_domain_get_irq_data(struct irq_domain *domain, unsigned int virq); #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY +extern struct irq_domain *irq_domain_add_hierarchy(struct irq_domain *parent, + unsigned int flags, unsigned int size, + struct device_node *node, + const struct irq_domain_ops *ops, void *host_data); extern int __irq_domain_alloc_irqs(struct irq_domain *domain, int irq_base, unsigned int nr_irqs, int node, void *arg, bool realloc); -- cgit v1.2.3 From 9dde55b72dc80bfae4280ddce5dbd69ba8240813 Mon Sep 17 00:00:00 2001 From: Jiang Liu Date: Sun, 9 Nov 2014 23:10:28 +0800 Subject: genirq: Introduce callback irq_chip.irq_write_msi_msg Introduce callback irq_chip.irq_write_msi_msg, so we can share common code among MSI alike interrupt controllers, such as HPET and DMAR. Signed-off-by: Jiang Liu Cc: Bjorn Helgaas Cc: Grant Likely Cc: Marc Zyngier Cc: Yingjoe Chen Cc: Yijing Wang Signed-off-by: Thomas Gleixner --- include/linux/irq.h | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'include/linux') diff --git a/include/linux/irq.h b/include/linux/irq.h index 677482bd8b92..8badf34baf0f 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -322,6 +322,7 @@ static inline irq_hw_number_t irqd_to_hwirq(struct irq_data *d) * @irq_release_resources: optional to release resources acquired with * irq_request_resources * @irq_compose_msi_msg: optional to compose message content for MSI + * @irq_write_msi_msg: optional to write message content for MSI * @flags: chip specific flags */ struct irq_chip { @@ -359,6 +360,7 @@ struct irq_chip { void (*irq_release_resources)(struct irq_data *data); void (*irq_compose_msi_msg)(struct irq_data *data, struct msi_msg *msg); + void (*irq_write_msi_msg)(struct irq_data *data, struct msi_msg *msg); unsigned long flags; }; @@ -459,6 +461,12 @@ extern int irq_chip_set_affinity_parent(struct irq_data *data, bool force); #endif +static inline void irq_chip_write_msi_msg(struct irq_data *data, + struct msi_msg *msg) +{ + data->chip->irq_write_msi_msg(data, msg); +} + /* Handling of unhandled and spurious interrupts: */ extern void note_interrupt(unsigned int irq, struct irq_desc *desc, irqreturn_t action_ret); -- cgit v1.2.3 From f3cf8bb0d6c3c11ddedf01f02f856f2ae8c33aa4 Mon Sep 17 00:00:00 2001 From: Jiang Liu Date: Wed, 12 Nov 2014 11:39:03 +0100 Subject: genirq: Add generic msi irq domain support Implement the basic functions for MSI interrupt support with hierarchical interrupt domains. [ tglx: Extracted and combined from several patches ] Signed-off-by: Jiang Liu Cc: Bjorn Helgaas Cc: Grant Likely Cc: Marc Zyngier Cc: Yingjoe Chen Cc: Yijing Wang Signed-off-by: Thomas Gleixner --- include/linux/msi.h | 45 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) (limited to 'include/linux') diff --git a/include/linux/msi.h b/include/linux/msi.h index e0d08517bd3d..b5ca2456769c 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -114,4 +114,49 @@ struct msi_controller { void (*teardown_irq)(struct msi_controller *chip, unsigned int irq); }; +#ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN +struct irq_domain; +struct irq_chip; +struct device_node; +struct msi_domain_info; + +/** + * struct msi_domain_ops - MSI interrupt domain callbacks + * @get_hwirq: Retrieve the resulting hw irq number + * @msi_init: Domain specific init function for MSI interrupts + * @msi_free: Domain specific function to free a MSI interrupts + */ +struct msi_domain_ops { + irq_hw_number_t (*get_hwirq)(struct msi_domain_info *info, void *arg); + int (*msi_init)(struct irq_domain *domain, + struct msi_domain_info *info, + unsigned int virq, irq_hw_number_t hwirq, + void *arg); + void (*msi_free)(struct irq_domain *domain, + struct msi_domain_info *info, + unsigned int virq); +}; + +/** + * struct msi_domain_info - MSI interrupt domain data + * @ops: The callback data structure + * @chip: The associated interrupt chip + * @data: Domain specific data + */ +struct msi_domain_info { + struct msi_domain_ops *ops; + struct irq_chip *chip; + void *data; +}; + +int msi_domain_set_affinity(struct irq_data *data, const struct cpumask *mask, + bool force); + +struct irq_domain *msi_create_irq_domain(struct device_node *of_node, + struct msi_domain_info *info, + struct irq_domain *parent); +struct msi_domain_info *msi_get_domain_info(struct irq_domain *domain); + +#endif /* CONFIG_GENERIC_MSI_IRQ_DOMAIN */ + #endif /* LINUX_MSI_H */ -- cgit v1.2.3 From d9109698be6e7439e6082aa00d79d4556114739b Mon Sep 17 00:00:00 2001 From: Jiang Liu Date: Sat, 15 Nov 2014 22:24:04 +0800 Subject: genirq: Introduce msi_domain_alloc/free_irqs() Introduce msi_domain_{alloc|free}_irqs() to alloc/free interrupts from generic MSI irqdomain. Signed-off-by: Jiang Liu Cc: Tony Luck Cc: linux-arm-kernel@lists.infradead.org Cc: Bjorn Helgaas Cc: Grant Likely Cc: Marc Zyngier Cc: Yijing Wang Cc: Yingjoe Chen Cc: Borislav Petkov Cc: Matthias Brugger Cc: Alexander Gordeev Link: http://lkml.kernel.org/r/1416061447-9472-7-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Thomas Gleixner --- include/linux/msi.h | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) (limited to 'include/linux') diff --git a/include/linux/msi.h b/include/linux/msi.h index b5ca2456769c..7a93a988dce8 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -115,6 +115,9 @@ struct msi_controller { }; #ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN + +#include + struct irq_domain; struct irq_chip; struct device_node; @@ -125,6 +128,18 @@ struct msi_domain_info; * @get_hwirq: Retrieve the resulting hw irq number * @msi_init: Domain specific init function for MSI interrupts * @msi_free: Domain specific function to free a MSI interrupts + * @msi_check: Callback for verification of the domain/info/dev data + * @msi_prepare: Prepare the allocation of the interrupts in the domain + * @msi_finish: Optional callbacl to finalize the allocation + * @set_desc: Set the msi descriptor for an interrupt + * @handle_error: Optional error handler if the allocation fails + * + * @get_hwirq, @msi_init and @msi_free are callbacks used by + * msi_create_irq_domain() and related interfaces + * + * @msi_check, @msi_prepare, @msi_finish, @set_desc and @handle_error + * are callbacks used by msi_irq_domain_alloc_irqs() and related + * interfaces which are based on msi_desc. */ struct msi_domain_ops { irq_hw_number_t (*get_hwirq)(struct msi_domain_info *info, void *arg); @@ -135,6 +150,17 @@ struct msi_domain_ops { void (*msi_free)(struct irq_domain *domain, struct msi_domain_info *info, unsigned int virq); + int (*msi_check)(struct irq_domain *domain, + struct msi_domain_info *info, + struct device *dev); + int (*msi_prepare)(struct irq_domain *domain, + struct device *dev, int nvec, + msi_alloc_info_t *arg); + void (*msi_finish)(msi_alloc_info_t *arg, int retval); + void (*set_desc)(msi_alloc_info_t *arg, + struct msi_desc *desc); + int (*handle_error)(struct irq_domain *domain, + struct msi_desc *desc, int error); }; /** @@ -155,6 +181,9 @@ int msi_domain_set_affinity(struct irq_data *data, const struct cpumask *mask, struct irq_domain *msi_create_irq_domain(struct device_node *of_node, struct msi_domain_info *info, struct irq_domain *parent); +int msi_domain_alloc_irqs(struct irq_domain *domain, struct device *dev, + int nvec); +void msi_domain_free_irqs(struct irq_domain *domain, struct device *dev); struct msi_domain_info *msi_get_domain_info(struct irq_domain *domain); #endif /* CONFIG_GENERIC_MSI_IRQ_DOMAIN */ -- cgit v1.2.3 From aeeb59657c35da64068336c20068da237f41ab76 Mon Sep 17 00:00:00 2001 From: Jiang Liu Date: Sat, 15 Nov 2014 22:24:05 +0800 Subject: genirq: Provide default callbacks for msi_domain_ops Extend struct msi_domain_info and provide default callbacks for msi_domain_ops. Signed-off-by: Jiang Liu Cc: Tony Luck Cc: linux-arm-kernel@lists.infradead.org Cc: Bjorn Helgaas Cc: Grant Likely Cc: Marc Zyngier Cc: Yijing Wang Cc: Yingjoe Chen Cc: Borislav Petkov Cc: Matthias Brugger Cc: Alexander Gordeev Link: http://lkml.kernel.org/r/1416061447-9472-8-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Thomas Gleixner --- include/linux/msi.h | 42 +++++++++++++++++++++++++++++++++++++----- 1 file changed, 37 insertions(+), 5 deletions(-) (limited to 'include/linux') diff --git a/include/linux/msi.h b/include/linux/msi.h index 7a93a988dce8..0098e2c8fd42 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -116,6 +116,7 @@ struct msi_controller { #ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN +#include #include struct irq_domain; @@ -142,11 +143,12 @@ struct msi_domain_info; * interfaces which are based on msi_desc. */ struct msi_domain_ops { - irq_hw_number_t (*get_hwirq)(struct msi_domain_info *info, void *arg); + irq_hw_number_t (*get_hwirq)(struct msi_domain_info *info, + msi_alloc_info_t *arg); int (*msi_init)(struct irq_domain *domain, struct msi_domain_info *info, unsigned int virq, irq_hw_number_t hwirq, - void *arg); + msi_alloc_info_t *arg); void (*msi_free)(struct irq_domain *domain, struct msi_domain_info *info, unsigned int virq); @@ -165,16 +167,46 @@ struct msi_domain_ops { /** * struct msi_domain_info - MSI interrupt domain data - * @ops: The callback data structure - * @chip: The associated interrupt chip - * @data: Domain specific data + * @flags: Flags to decribe features and capabilities + * @ops: The callback data structure + * @chip: Optional: associated interrupt chip + * @chip_data: Optional: associated interrupt chip data + * @handler: Optional: associated interrupt flow handler + * @handler_data: Optional: associated interrupt flow handler data + * @handler_name: Optional: associated interrupt flow handler name + * @data: Optional: domain specific data */ struct msi_domain_info { + u32 flags; struct msi_domain_ops *ops; struct irq_chip *chip; + void *chip_data; + irq_flow_handler_t handler; + void *handler_data; + const char *handler_name; void *data; }; +/* Flags for msi_domain_info */ +enum { + /* + * Init non implemented ops callbacks with default MSI domain + * callbacks. + */ + MSI_FLAG_USE_DEF_DOM_OPS = (1 << 0), + /* + * Init non implemented chip callbacks with default MSI chip + * callbacks. + */ + MSI_FLAG_USE_DEF_CHIP_OPS = (1 << 1), + /* Build identity map between hwirq and irq */ + MSI_FLAG_IDENTITY_MAP = (1 << 2), + /* Support multiple PCI MSI interrupts */ + MSI_FLAG_MULTI_PCI_MSI = (1 << 3), + /* Support PCI MSIX interrupts */ + MSI_FLAG_PCI_MSIX = (1 << 4), +}; + int msi_domain_set_affinity(struct irq_data *data, const struct cpumask *mask, bool force); -- cgit v1.2.3 From 3878eaefb89aa841ae4c2150490cee864ac628cb Mon Sep 17 00:00:00 2001 From: Jiang Liu Date: Tue, 11 Nov 2014 21:02:18 +0800 Subject: PCI/MSI: Enhance core to support hierarchy irqdomain Enhance PCI MSI core to support hierarchy irqdomain, so the common code can be shared across architectures. [ tglx: Extracted and combined from several patches ] Signed-off-by: Jiang Liu Cc: Bjorn Helgaas Cc: Grant Likely Cc: Marc Zyngier Cc: Yingjoe Chen Cc: Yijing Wang Signed-off-by: Thomas Gleixner --- include/linux/msi.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'include/linux') diff --git a/include/linux/msi.h b/include/linux/msi.h index 0098e2c8fd42..1628788aee25 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -220,4 +220,18 @@ struct msi_domain_info *msi_get_domain_info(struct irq_domain *domain); #endif /* CONFIG_GENERIC_MSI_IRQ_DOMAIN */ +#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN +void pci_msi_domain_write_msg(struct irq_data *irq_data, struct msi_msg *msg); +struct irq_domain *pci_msi_create_irq_domain(struct device_node *node, + struct msi_domain_info *info, + struct irq_domain *parent); +int pci_msi_domain_alloc_irqs(struct irq_domain *domain, struct pci_dev *dev, + int nvec, int type); +void pci_msi_domain_free_irqs(struct irq_domain *domain, struct pci_dev *dev); +irq_hw_number_t pci_msi_domain_calc_hwirq(struct pci_dev *dev, + struct msi_desc *desc); +int pci_msi_domain_check_cap(struct irq_domain *domain, + struct msi_domain_info *info, struct device *dev); +#endif /* CONFIG_PCI_MSI_IRQ_DOMAIN */ + #endif /* LINUX_MSI_H */ -- cgit v1.2.3 From 8e047adae969701c6cec136484bb9de8572af934 Mon Sep 17 00:00:00 2001 From: Jiang Liu Date: Sat, 15 Nov 2014 22:24:07 +0800 Subject: PCI/MSI: Provide mechanism to alloc/free MSI/MSIX interrupt from irqdomain Provide mechanism to directly alloc/free MSI/MSIX interrupt from irqdomain, which will be used to replace arch_setup_msi_irq()/ arch_setup_msi_irqs()/arch_teardown_msi_irq()/arch_teardown_msi_irqs(). To kill weak functions, this patch introduce a new weak function arch_get_pci_msi_domain(), which is to retrieve the MSI irqdomain for a PCI device. This weak function could be killed once we get a common way to associate MSI domain with PCI device. Signed-off-by: Jiang Liu Cc: Tony Luck Cc: linux-arm-kernel@lists.infradead.org Cc: Bjorn Helgaas Cc: Grant Likely Cc: Marc Zyngier Cc: Yijing Wang Cc: Yingjoe Chen Cc: Borislav Petkov Cc: Matthias Brugger Cc: Alexander Gordeev Link: http://lkml.kernel.org/r/1416061447-9472-10-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Thomas Gleixner --- include/linux/msi.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/linux') diff --git a/include/linux/msi.h b/include/linux/msi.h index 1628788aee25..692f217ae813 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -228,6 +228,9 @@ struct irq_domain *pci_msi_create_irq_domain(struct device_node *node, int pci_msi_domain_alloc_irqs(struct irq_domain *domain, struct pci_dev *dev, int nvec, int type); void pci_msi_domain_free_irqs(struct irq_domain *domain, struct pci_dev *dev); +struct irq_domain *pci_msi_create_default_irq_domain(struct device_node *node, + struct msi_domain_info *info, struct irq_domain *parent); + irq_hw_number_t pci_msi_domain_calc_hwirq(struct pci_dev *dev, struct msi_desc *desc); int pci_msi_domain_check_cap(struct irq_domain *domain, -- cgit v1.2.3 From 020c312658d61297ffe43b412441c69b1c36fb1b Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Sat, 15 Nov 2014 10:49:12 +0000 Subject: PCI/MSI: Allow an msi_controller to be associated to an irq domain With the new stacked irq domains, it becomes pretty tempting to allocate an MSI domain per PCI bus, which would remove the requirement of either relying on arch-specific code, or a default PCI MSI domain. By allowing the msi_controller structure to carry a pointer to an irq_domain, we can easily use this in pci_msi_setup_msi_irqs. The existing code can still be used as a fallback if the MSI driver does not populate the domain field. Tested on arm64 with the GICv3 ITS driver. Signed-off-by: Marc Zyngier Cc: Yingjoe Chen Cc: Bjorn Helgaas Cc: linux-arm-kernel@lists.infradead.org Cc: Jiang Liu Link: http://lkml.kernel.org/r/1416048553-29289-2-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner --- include/linux/msi.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/linux') diff --git a/include/linux/msi.h b/include/linux/msi.h index 692f217ae813..8ac4a68ffae2 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -108,6 +108,9 @@ struct msi_controller { struct device *dev; struct device_node *of_node; struct list_head list; +#ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN + struct irq_domain *domain; +#endif int (*setup_irq)(struct msi_controller *chip, struct pci_dev *dev, struct msi_desc *desc); -- cgit v1.2.3 From c274e03af70544506cd7214fcc2d4c4376c2c6f4 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Radim=20Kr=C4=8Dm=C3=A1=C5=99?= Date: Fri, 21 Nov 2014 22:21:50 +0100 Subject: kvm: x86: move assigned-dev.c and iommu.c to arch/x86/ MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Now that ia64 is gone, we can hide deprecated device assignment in x86. Notable changes: - kvm_vm_ioctl_assigned_device() was moved to x86/kvm_arch_vm_ioctl() The easy parts were removed from generic kvm code, remaining - kvm_iommu_(un)map_pages() would require new code to be moved - struct kvm_assigned_dev_kernel depends on struct kvm_irq_ack_notifier Signed-off-by: Radim Krčmář Signed-off-by: Paolo Bonzini --- include/linux/kvm_host.h | 26 -------------------------- 1 file changed, 26 deletions(-) (limited to 'include/linux') diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index ded64cb3a081..aa56894ce839 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -764,8 +764,6 @@ void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id); #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot); void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot); -int kvm_iommu_map_guest(struct kvm *kvm); -int kvm_iommu_unmap_guest(struct kvm *kvm); int kvm_assign_device(struct kvm *kvm, struct kvm_assigned_dev_kernel *assigned_dev); int kvm_deassign_device(struct kvm *kvm, @@ -781,11 +779,6 @@ static inline void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot) { } - -static inline int kvm_iommu_unmap_guest(struct kvm *kvm) -{ - return 0; -} #endif static inline void kvm_guest_enter(void) @@ -1005,25 +998,6 @@ static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; } #endif -#ifdef CONFIG_KVM_DEVICE_ASSIGNMENT - -long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl, - unsigned long arg); - -void kvm_free_all_assigned_devices(struct kvm *kvm); - -#else - -static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl, - unsigned long arg) -{ - return -ENOTTY; -} - -static inline void kvm_free_all_assigned_devices(struct kvm *kvm) {} - -#endif - static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu) { set_bit(req, &vcpu->requests); -- cgit v1.2.3 From 40e7fcb19293cbdff02c74cb0668413480f82ea1 Mon Sep 17 00:00:00 2001 From: Lan Tianyu Date: Sun, 23 Nov 2014 21:22:54 +0800 Subject: ACPI: Add _DEP support to fix battery issue on Asus T100TA ACPI 5.0 introduces _DEP (Operation Region Dependencies) to designate device objects that OSPM should assign a higher priority in start ordering due to future operation region accesses. On Asus T100TA, ACPI battery info are read from a I2C slave device via I2C operation region. Before I2C operation region handler is installed, battery _STA always returns 0. There is a _DEP method of designating start order under battery device node. This patch is to implement _DEP feature to fix battery issue on the Asus T100TA. Introducing acpi_dep_list and adding dep_unmet count in struct acpi_device. During ACPI namespace scan, create struct acpi_dep_data for a valid pair of master (device pointed to by _DEP)/ slave(device with _DEP), record master's and slave's ACPI handle in it and put it into acpi_dep_list. The dep_unmet count will increase by one if there is a device under its _DEP. Driver's probe() should return EPROBE_DEFER when find dep_unmet is larger than 0. When I2C operation region handler is installed, remove all struct acpi_dep_data on the acpi_dep_list whose master is pointed to I2C host controller and decrease slave's dep_unmet. When dep_unmet decreases to 0, all _DEP conditions are met and then do acpi_bus_attach() for the device in order to resolve battery _STA issue on the Asus T100TA. Link: https://bugzilla.kernel.org/show_bug.cgi?id=69011 Tested-by: Jan-Michael Brummer Tested-by: Adam Williamson Tested-by: Michael Shigorin Acked-by: Wolfram Sang Acked-by: Mika Westerberg Signed-off-by: Lan Tianyu Signed-off-by: Rafael J. Wysocki --- include/linux/acpi.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 407a12f663eb..6cb310388c88 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -431,6 +431,7 @@ static inline bool acpi_driver_match_device(struct device *dev, int acpi_device_uevent_modalias(struct device *, struct kobj_uevent_env *); int acpi_device_modalias(struct device *, char *, int); +void acpi_walk_dep_device_list(acpi_handle handle); struct platform_device *acpi_create_platform_device(struct acpi_device *); #define ACPI_PTR(_ptr) (_ptr) -- cgit v1.2.3 From 4060bbe9931eca2ed3c2124022a070a75d507472 Mon Sep 17 00:00:00 2001 From: Andrew Bresticker Date: Mon, 20 Oct 2014 12:03:53 -0700 Subject: MIPS: Move gic.h to include/linux/irqchip/mips-gic.h Now that the MIPS GIC irqchip lives in drivers/irqchip/, move its header over to include/linux/irqchip/. Signed-off-by: Andrew Bresticker Cc: Daniel Lezcano Cc: Thomas Gleixner Cc: Jason Cooper Cc: Paul Burton Cc: Qais Yousef Cc: John Crispin Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/8129/ Signed-off-by: Ralf Baechle --- include/linux/irqchip/mips-gic.h | 325 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 325 insertions(+) create mode 100644 include/linux/irqchip/mips-gic.h (limited to 'include/linux') diff --git a/include/linux/irqchip/mips-gic.h b/include/linux/irqchip/mips-gic.h new file mode 100644 index 000000000000..285944ca9f6c --- /dev/null +++ b/include/linux/irqchip/mips-gic.h @@ -0,0 +1,325 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 2000, 07 MIPS Technologies, Inc. + * + * GIC Register Definitions + * + */ +#ifndef _ASM_GICREGS_H +#define _ASM_GICREGS_H + +#include +#include + +#include + +#define GIC_MAX_INTRS 256 + +/* Constants */ +#define GIC_POL_POS 1 +#define GIC_POL_NEG 0 +#define GIC_TRIG_EDGE 1 +#define GIC_TRIG_LEVEL 0 +#define GIC_TRIG_DUAL_ENABLE 1 +#define GIC_TRIG_DUAL_DISABLE 0 + +#define MSK(n) ((1 << (n)) - 1) + +/* Accessors */ +#define GIC_REG(segment, offset) (segment##_##SECTION_OFS + offset##_##OFS) + +/* GIC Address Space */ +#define SHARED_SECTION_OFS 0x0000 +#define SHARED_SECTION_SIZE 0x8000 +#define VPE_LOCAL_SECTION_OFS 0x8000 +#define VPE_LOCAL_SECTION_SIZE 0x4000 +#define VPE_OTHER_SECTION_OFS 0xc000 +#define VPE_OTHER_SECTION_SIZE 0x4000 +#define USM_VISIBLE_SECTION_OFS 0x10000 +#define USM_VISIBLE_SECTION_SIZE 0x10000 + +/* Register Map for Shared Section */ + +#define GIC_SH_CONFIG_OFS 0x0000 + +/* Shared Global Counter */ +#define GIC_SH_COUNTER_31_00_OFS 0x0010 +#define GIC_SH_COUNTER_63_32_OFS 0x0014 +#define GIC_SH_REVISIONID_OFS 0x0020 + +/* Interrupt Polarity */ +#define GIC_SH_POL_31_0_OFS 0x0100 +#define GIC_SH_POL_63_32_OFS 0x0104 +#define GIC_SH_POL_95_64_OFS 0x0108 +#define GIC_SH_POL_127_96_OFS 0x010c +#define GIC_SH_POL_159_128_OFS 0x0110 +#define GIC_SH_POL_191_160_OFS 0x0114 +#define GIC_SH_POL_223_192_OFS 0x0118 +#define GIC_SH_POL_255_224_OFS 0x011c + +/* Edge/Level Triggering */ +#define GIC_SH_TRIG_31_0_OFS 0x0180 +#define GIC_SH_TRIG_63_32_OFS 0x0184 +#define GIC_SH_TRIG_95_64_OFS 0x0188 +#define GIC_SH_TRIG_127_96_OFS 0x018c +#define GIC_SH_TRIG_159_128_OFS 0x0190 +#define GIC_SH_TRIG_191_160_OFS 0x0194 +#define GIC_SH_TRIG_223_192_OFS 0x0198 +#define GIC_SH_TRIG_255_224_OFS 0x019c + +/* Dual Edge Triggering */ +#define GIC_SH_DUAL_31_0_OFS 0x0200 +#define GIC_SH_DUAL_63_32_OFS 0x0204 +#define GIC_SH_DUAL_95_64_OFS 0x0208 +#define GIC_SH_DUAL_127_96_OFS 0x020c +#define GIC_SH_DUAL_159_128_OFS 0x0210 +#define GIC_SH_DUAL_191_160_OFS 0x0214 +#define GIC_SH_DUAL_223_192_OFS 0x0218 +#define GIC_SH_DUAL_255_224_OFS 0x021c + +/* Set/Clear corresponding bit in Edge Detect Register */ +#define GIC_SH_WEDGE_OFS 0x0280 + +/* Reset Mask - Disables Interrupt */ +#define GIC_SH_RMASK_31_0_OFS 0x0300 +#define GIC_SH_RMASK_63_32_OFS 0x0304 +#define GIC_SH_RMASK_95_64_OFS 0x0308 +#define GIC_SH_RMASK_127_96_OFS 0x030c +#define GIC_SH_RMASK_159_128_OFS 0x0310 +#define GIC_SH_RMASK_191_160_OFS 0x0314 +#define GIC_SH_RMASK_223_192_OFS 0x0318 +#define GIC_SH_RMASK_255_224_OFS 0x031c + +/* Set Mask (WO) - Enables Interrupt */ +#define GIC_SH_SMASK_31_0_OFS 0x0380 +#define GIC_SH_SMASK_63_32_OFS 0x0384 +#define GIC_SH_SMASK_95_64_OFS 0x0388 +#define GIC_SH_SMASK_127_96_OFS 0x038c +#define GIC_SH_SMASK_159_128_OFS 0x0390 +#define GIC_SH_SMASK_191_160_OFS 0x0394 +#define GIC_SH_SMASK_223_192_OFS 0x0398 +#define GIC_SH_SMASK_255_224_OFS 0x039c + +/* Global Interrupt Mask Register (RO) - Bit Set == Interrupt enabled */ +#define GIC_SH_MASK_31_0_OFS 0x0400 +#define GIC_SH_MASK_63_32_OFS 0x0404 +#define GIC_SH_MASK_95_64_OFS 0x0408 +#define GIC_SH_MASK_127_96_OFS 0x040c +#define GIC_SH_MASK_159_128_OFS 0x0410 +#define GIC_SH_MASK_191_160_OFS 0x0414 +#define GIC_SH_MASK_223_192_OFS 0x0418 +#define GIC_SH_MASK_255_224_OFS 0x041c + +/* Pending Global Interrupts (RO) */ +#define GIC_SH_PEND_31_0_OFS 0x0480 +#define GIC_SH_PEND_63_32_OFS 0x0484 +#define GIC_SH_PEND_95_64_OFS 0x0488 +#define GIC_SH_PEND_127_96_OFS 0x048c +#define GIC_SH_PEND_159_128_OFS 0x0490 +#define GIC_SH_PEND_191_160_OFS 0x0494 +#define GIC_SH_PEND_223_192_OFS 0x0498 +#define GIC_SH_PEND_255_224_OFS 0x049c + +#define GIC_SH_INTR_MAP_TO_PIN_BASE_OFS 0x0500 + +/* Maps Interrupt X to a Pin */ +#define GIC_SH_MAP_TO_PIN(intr) (4 * (intr)) + +#define GIC_SH_INTR_MAP_TO_VPE_BASE_OFS 0x2000 + +/* Maps Interrupt X to a VPE */ +#define GIC_SH_MAP_TO_VPE_REG_OFF(intr, vpe) \ + ((32 * (intr)) + (((vpe) / 32) * 4)) +#define GIC_SH_MAP_TO_VPE_REG_BIT(vpe) (1 << ((vpe) % 32)) + +/* Convert an interrupt number to a byte offset/bit for multi-word registers */ +#define GIC_INTR_OFS(intr) (((intr) / 32)*4) +#define GIC_INTR_BIT(intr) ((intr) % 32) + +/* Polarity : Reset Value is always 0 */ +#define GIC_SH_SET_POLARITY_OFS 0x0100 + +/* Triggering : Reset Value is always 0 */ +#define GIC_SH_SET_TRIGGER_OFS 0x0180 + +/* Dual edge triggering : Reset Value is always 0 */ +#define GIC_SH_SET_DUAL_OFS 0x0200 + +/* Mask manipulation */ +#define GIC_SH_SMASK_OFS 0x0380 +#define GIC_SH_RMASK_OFS 0x0300 + +/* Register Map for Local Section */ +#define GIC_VPE_CTL_OFS 0x0000 +#define GIC_VPE_PEND_OFS 0x0004 +#define GIC_VPE_MASK_OFS 0x0008 +#define GIC_VPE_RMASK_OFS 0x000c +#define GIC_VPE_SMASK_OFS 0x0010 +#define GIC_VPE_WD_MAP_OFS 0x0040 +#define GIC_VPE_COMPARE_MAP_OFS 0x0044 +#define GIC_VPE_TIMER_MAP_OFS 0x0048 +#define GIC_VPE_FDC_MAP_OFS 0x004c +#define GIC_VPE_PERFCTR_MAP_OFS 0x0050 +#define GIC_VPE_SWINT0_MAP_OFS 0x0054 +#define GIC_VPE_SWINT1_MAP_OFS 0x0058 +#define GIC_VPE_OTHER_ADDR_OFS 0x0080 +#define GIC_VPE_WD_CONFIG0_OFS 0x0090 +#define GIC_VPE_WD_COUNT0_OFS 0x0094 +#define GIC_VPE_WD_INITIAL0_OFS 0x0098 +#define GIC_VPE_COMPARE_LO_OFS 0x00a0 +#define GIC_VPE_COMPARE_HI_OFS 0x00a4 + +#define GIC_VPE_EIC_SHADOW_SET_BASE_OFS 0x0100 +#define GIC_VPE_EIC_SS(intr) (4 * (intr)) + +#define GIC_VPE_EIC_VEC_BASE_OFS 0x0800 +#define GIC_VPE_EIC_VEC(intr) (4 * (intr)) + +#define GIC_VPE_TENABLE_NMI_OFS 0x1000 +#define GIC_VPE_TENABLE_YQ_OFS 0x1004 +#define GIC_VPE_TENABLE_INT_31_0_OFS 0x1080 +#define GIC_VPE_TENABLE_INT_63_32_OFS 0x1084 + +/* User Mode Visible Section Register Map */ +#define GIC_UMV_SH_COUNTER_31_00_OFS 0x0000 +#define GIC_UMV_SH_COUNTER_63_32_OFS 0x0004 + +/* Masks */ +#define GIC_SH_CONFIG_COUNTSTOP_SHF 28 +#define GIC_SH_CONFIG_COUNTSTOP_MSK (MSK(1) << GIC_SH_CONFIG_COUNTSTOP_SHF) + +#define GIC_SH_CONFIG_COUNTBITS_SHF 24 +#define GIC_SH_CONFIG_COUNTBITS_MSK (MSK(4) << GIC_SH_CONFIG_COUNTBITS_SHF) + +#define GIC_SH_CONFIG_NUMINTRS_SHF 16 +#define GIC_SH_CONFIG_NUMINTRS_MSK (MSK(8) << GIC_SH_CONFIG_NUMINTRS_SHF) + +#define GIC_SH_CONFIG_NUMVPES_SHF 0 +#define GIC_SH_CONFIG_NUMVPES_MSK (MSK(8) << GIC_SH_CONFIG_NUMVPES_SHF) + +#define GIC_SH_WEDGE_SET(intr) (intr | (0x1 << 31)) +#define GIC_SH_WEDGE_CLR(intr) (intr & ~(0x1 << 31)) + +#define GIC_MAP_TO_PIN_SHF 31 +#define GIC_MAP_TO_PIN_MSK (MSK(1) << GIC_MAP_TO_PIN_SHF) +#define GIC_MAP_TO_NMI_SHF 30 +#define GIC_MAP_TO_NMI_MSK (MSK(1) << GIC_MAP_TO_NMI_SHF) +#define GIC_MAP_TO_YQ_SHF 29 +#define GIC_MAP_TO_YQ_MSK (MSK(1) << GIC_MAP_TO_YQ_SHF) +#define GIC_MAP_SHF 0 +#define GIC_MAP_MSK (MSK(6) << GIC_MAP_SHF) + +/* GIC_VPE_CTL Masks */ +#define GIC_VPE_CTL_FDC_RTBL_SHF 4 +#define GIC_VPE_CTL_FDC_RTBL_MSK (MSK(1) << GIC_VPE_CTL_FDC_RTBL_SHF) +#define GIC_VPE_CTL_SWINT_RTBL_SHF 3 +#define GIC_VPE_CTL_SWINT_RTBL_MSK (MSK(1) << GIC_VPE_CTL_SWINT_RTBL_SHF) +#define GIC_VPE_CTL_PERFCNT_RTBL_SHF 2 +#define GIC_VPE_CTL_PERFCNT_RTBL_MSK (MSK(1) << GIC_VPE_CTL_PERFCNT_RTBL_SHF) +#define GIC_VPE_CTL_TIMER_RTBL_SHF 1 +#define GIC_VPE_CTL_TIMER_RTBL_MSK (MSK(1) << GIC_VPE_CTL_TIMER_RTBL_SHF) +#define GIC_VPE_CTL_EIC_MODE_SHF 0 +#define GIC_VPE_CTL_EIC_MODE_MSK (MSK(1) << GIC_VPE_CTL_EIC_MODE_SHF) + +/* GIC_VPE_PEND Masks */ +#define GIC_VPE_PEND_WD_SHF 0 +#define GIC_VPE_PEND_WD_MSK (MSK(1) << GIC_VPE_PEND_WD_SHF) +#define GIC_VPE_PEND_CMP_SHF 1 +#define GIC_VPE_PEND_CMP_MSK (MSK(1) << GIC_VPE_PEND_CMP_SHF) +#define GIC_VPE_PEND_TIMER_SHF 2 +#define GIC_VPE_PEND_TIMER_MSK (MSK(1) << GIC_VPE_PEND_TIMER_SHF) +#define GIC_VPE_PEND_PERFCOUNT_SHF 3 +#define GIC_VPE_PEND_PERFCOUNT_MSK (MSK(1) << GIC_VPE_PEND_PERFCOUNT_SHF) +#define GIC_VPE_PEND_SWINT0_SHF 4 +#define GIC_VPE_PEND_SWINT0_MSK (MSK(1) << GIC_VPE_PEND_SWINT0_SHF) +#define GIC_VPE_PEND_SWINT1_SHF 5 +#define GIC_VPE_PEND_SWINT1_MSK (MSK(1) << GIC_VPE_PEND_SWINT1_SHF) + +/* GIC_VPE_RMASK Masks */ +#define GIC_VPE_RMASK_WD_SHF 0 +#define GIC_VPE_RMASK_WD_MSK (MSK(1) << GIC_VPE_RMASK_WD_SHF) +#define GIC_VPE_RMASK_CMP_SHF 1 +#define GIC_VPE_RMASK_CMP_MSK (MSK(1) << GIC_VPE_RMASK_CMP_SHF) +#define GIC_VPE_RMASK_TIMER_SHF 2 +#define GIC_VPE_RMASK_TIMER_MSK (MSK(1) << GIC_VPE_RMASK_TIMER_SHF) +#define GIC_VPE_RMASK_PERFCNT_SHF 3 +#define GIC_VPE_RMASK_PERFCNT_MSK (MSK(1) << GIC_VPE_RMASK_PERFCNT_SHF) +#define GIC_VPE_RMASK_SWINT0_SHF 4 +#define GIC_VPE_RMASK_SWINT0_MSK (MSK(1) << GIC_VPE_RMASK_SWINT0_SHF) +#define GIC_VPE_RMASK_SWINT1_SHF 5 +#define GIC_VPE_RMASK_SWINT1_MSK (MSK(1) << GIC_VPE_RMASK_SWINT1_SHF) + +/* GIC_VPE_SMASK Masks */ +#define GIC_VPE_SMASK_WD_SHF 0 +#define GIC_VPE_SMASK_WD_MSK (MSK(1) << GIC_VPE_SMASK_WD_SHF) +#define GIC_VPE_SMASK_CMP_SHF 1 +#define GIC_VPE_SMASK_CMP_MSK (MSK(1) << GIC_VPE_SMASK_CMP_SHF) +#define GIC_VPE_SMASK_TIMER_SHF 2 +#define GIC_VPE_SMASK_TIMER_MSK (MSK(1) << GIC_VPE_SMASK_TIMER_SHF) +#define GIC_VPE_SMASK_PERFCNT_SHF 3 +#define GIC_VPE_SMASK_PERFCNT_MSK (MSK(1) << GIC_VPE_SMASK_PERFCNT_SHF) +#define GIC_VPE_SMASK_SWINT0_SHF 4 +#define GIC_VPE_SMASK_SWINT0_MSK (MSK(1) << GIC_VPE_SMASK_SWINT0_SHF) +#define GIC_VPE_SMASK_SWINT1_SHF 5 +#define GIC_VPE_SMASK_SWINT1_MSK (MSK(1) << GIC_VPE_SMASK_SWINT1_SHF) + +/* GIC nomenclature for Core Interrupt Pins. */ +#define GIC_CPU_INT0 0 /* Core Interrupt 2 */ +#define GIC_CPU_INT1 1 /* . */ +#define GIC_CPU_INT2 2 /* . */ +#define GIC_CPU_INT3 3 /* . */ +#define GIC_CPU_INT4 4 /* . */ +#define GIC_CPU_INT5 5 /* Core Interrupt 7 */ + +/* Add 2 to convert GIC CPU pin to core interrupt */ +#define GIC_CPU_PIN_OFFSET 2 + +/* Add 2 to convert non-EIC hardware interrupt to EIC vector number. */ +#define GIC_CPU_TO_VEC_OFFSET (2) + +/* Mapped interrupt to pin X, then GIC will generate the vector (X+1). */ +#define GIC_PIN_TO_VEC_OFFSET (1) + +/* Local GIC interrupts. */ +#define GIC_LOCAL_INT_WD 0 /* GIC watchdog */ +#define GIC_LOCAL_INT_COMPARE 1 /* GIC count and compare timer */ +#define GIC_LOCAL_INT_TIMER 2 /* CPU timer interrupt */ +#define GIC_LOCAL_INT_PERFCTR 3 /* CPU performance counter */ +#define GIC_LOCAL_INT_SWINT0 4 /* CPU software interrupt 0 */ +#define GIC_LOCAL_INT_SWINT1 5 /* CPU software interrupt 1 */ +#define GIC_LOCAL_INT_FDC 6 /* CPU fast debug channel */ +#define GIC_NUM_LOCAL_INTRS 7 + +/* Convert between local/shared IRQ number and GIC HW IRQ number. */ +#define GIC_LOCAL_HWIRQ_BASE 0 +#define GIC_LOCAL_TO_HWIRQ(x) (GIC_LOCAL_HWIRQ_BASE + (x)) +#define GIC_HWIRQ_TO_LOCAL(x) ((x) - GIC_LOCAL_HWIRQ_BASE) +#define GIC_SHARED_HWIRQ_BASE GIC_NUM_LOCAL_INTRS +#define GIC_SHARED_TO_HWIRQ(x) (GIC_SHARED_HWIRQ_BASE + (x)) +#define GIC_HWIRQ_TO_SHARED(x) ((x) - GIC_SHARED_HWIRQ_BASE) + +#include +#include + +extern unsigned int gic_present; +extern unsigned int gic_frequency; + +extern void gic_init(unsigned long gic_base_addr, + unsigned long gic_addrspace_size, unsigned int cpu_vec, + unsigned int irqbase); +extern void gic_clocksource_init(unsigned int); +extern cycle_t gic_read_count(void); +extern unsigned int gic_get_count_width(void); +extern cycle_t gic_read_compare(void); +extern void gic_write_compare(cycle_t cnt); +extern void gic_write_cpu_compare(cycle_t cnt, int cpu); +extern void gic_send_ipi(unsigned int intr); +extern unsigned int plat_ipi_call_int_xlate(unsigned int); +extern unsigned int plat_ipi_resched_int_xlate(unsigned int); +extern unsigned int gic_get_timer_pending(void); +extern int gic_get_c0_compare_int(void); +extern int gic_get_c0_perfcount_int(void); +#endif /* _ASM_GICREGS_H */ -- cgit v1.2.3 From 774c105ed8d791b709b40082d107f5bb40254374 Mon Sep 17 00:00:00 2001 From: Paul Burton Date: Thu, 11 Sep 2014 08:30:16 +0100 Subject: binfmt_elf: allow arch code to examine PT_LOPROC ... PT_HIPROC headers MIPS is introducing new variants of its O32 ABI which differ in their handling of floating point, in order to enable a gradual transition towards a world where mips32 binaries can take advantage of new hardware features only available when configured for certain FP modes. In order to do this ELF binaries are being augmented with a new section that indicates, amongst other things, the FP mode requirements of the binary. The presence & location of such a section is indicated by a program header in the PT_LOPROC ... PT_HIPROC range. In order to allow the MIPS architecture code to examine the program header & section in question, pass all program headers in this range to an architecture-specific arch_elf_pt_proc function. This function may return an error if the header is deemed invalid or unsuitable for the system, in which case that error will be returned from load_elf_binary and upwards through the execve syscall. A means is required for the architecture code to make a decision once it is known that all such headers have been seen, but before it is too late to return from an execve syscall. For this purpose the arch_check_elf function is added, and called once, after all PT_LOPROC to PT_HIPROC headers have been passed to arch_elf_pt_proc but before the code which invoked execve has been lost. This enables the architecture code to make a decision based upon all the headers present in an ELF binary and its interpreter, as is required to forbid conflicting FP ABI requirements between an ELF & its interpreter. In order to allow data to be stored throughout the calls to the above functions, struct arch_elf_state is introduced. Finally a variant of the SET_PERSONALITY macro is introduced which accepts a pointer to the struct arch_elf_state, allowing it to act based upon state observed from the architecture specific program headers. Signed-off-by: Paul Burton Cc: linux-mips@linux-mips.org Cc: Alexander Viro Cc: linux-fsdevel@vger.kernel.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/7679/ Signed-off-by: Ralf Baechle --- include/linux/elf.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include/linux') diff --git a/include/linux/elf.h b/include/linux/elf.h index 67a5fa7830c4..20fa8d8ae313 100644 --- a/include/linux/elf.h +++ b/include/linux/elf.h @@ -15,6 +15,11 @@ set_personality(PER_LINUX | (current->personality & (~PER_MASK))) #endif +#ifndef SET_PERSONALITY2 +#define SET_PERSONALITY2(ex, state) \ + SET_PERSONALITY(ex) +#endif + #if ELF_CLASS == ELFCLASS32 extern Elf32_Dyn _DYNAMIC []; -- cgit v1.2.3 From 824f3f7fa2b441416e3d9aaf1f19feab7db44747 Mon Sep 17 00:00:00 2001 From: Andrew Bresticker Date: Mon, 20 Oct 2014 12:03:54 -0700 Subject: irqchip: mips-gic: Clean up header file Remove duplicate #defines and unnecessary #includes, fix parenthesization, and re-order register definitions in ascending order. Signed-off-by: Andrew Bresticker Cc: Daniel Lezcano Cc: Thomas Gleixner Cc: Jason Cooper Cc: Paul Burton Cc: Qais Yousef Cc: John Crispin Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/8128/ Signed-off-by: Ralf Baechle --- include/linux/irqchip/mips-gic.h | 129 ++++++++------------------------------- 1 file changed, 27 insertions(+), 102 deletions(-) (limited to 'include/linux') diff --git a/include/linux/irqchip/mips-gic.h b/include/linux/irqchip/mips-gic.h index 285944ca9f6c..0350effb7ccc 100644 --- a/include/linux/irqchip/mips-gic.h +++ b/include/linux/irqchip/mips-gic.h @@ -4,17 +4,11 @@ * for more details. * * Copyright (C) 2000, 07 MIPS Technologies, Inc. - * - * GIC Register Definitions - * */ -#ifndef _ASM_GICREGS_H -#define _ASM_GICREGS_H - -#include -#include +#ifndef __LINUX_IRQCHIP_MIPS_GIC_H +#define __LINUX_IRQCHIP_MIPS_GIC_H -#include +#include #define GIC_MAX_INTRS 256 @@ -50,108 +44,42 @@ #define GIC_SH_COUNTER_63_32_OFS 0x0014 #define GIC_SH_REVISIONID_OFS 0x0020 -/* Interrupt Polarity */ -#define GIC_SH_POL_31_0_OFS 0x0100 -#define GIC_SH_POL_63_32_OFS 0x0104 -#define GIC_SH_POL_95_64_OFS 0x0108 -#define GIC_SH_POL_127_96_OFS 0x010c -#define GIC_SH_POL_159_128_OFS 0x0110 -#define GIC_SH_POL_191_160_OFS 0x0114 -#define GIC_SH_POL_223_192_OFS 0x0118 -#define GIC_SH_POL_255_224_OFS 0x011c - -/* Edge/Level Triggering */ -#define GIC_SH_TRIG_31_0_OFS 0x0180 -#define GIC_SH_TRIG_63_32_OFS 0x0184 -#define GIC_SH_TRIG_95_64_OFS 0x0188 -#define GIC_SH_TRIG_127_96_OFS 0x018c -#define GIC_SH_TRIG_159_128_OFS 0x0190 -#define GIC_SH_TRIG_191_160_OFS 0x0194 -#define GIC_SH_TRIG_223_192_OFS 0x0198 -#define GIC_SH_TRIG_255_224_OFS 0x019c - -/* Dual Edge Triggering */ -#define GIC_SH_DUAL_31_0_OFS 0x0200 -#define GIC_SH_DUAL_63_32_OFS 0x0204 -#define GIC_SH_DUAL_95_64_OFS 0x0208 -#define GIC_SH_DUAL_127_96_OFS 0x020c -#define GIC_SH_DUAL_159_128_OFS 0x0210 -#define GIC_SH_DUAL_191_160_OFS 0x0214 -#define GIC_SH_DUAL_223_192_OFS 0x0218 -#define GIC_SH_DUAL_255_224_OFS 0x021c +/* Convert an interrupt number to a byte offset/bit for multi-word registers */ +#define GIC_INTR_OFS(intr) (((intr) / 32) * 4) +#define GIC_INTR_BIT(intr) ((intr) % 32) + +/* Polarity : Reset Value is always 0 */ +#define GIC_SH_SET_POLARITY_OFS 0x0100 + +/* Triggering : Reset Value is always 0 */ +#define GIC_SH_SET_TRIGGER_OFS 0x0180 + +/* Dual edge triggering : Reset Value is always 0 */ +#define GIC_SH_SET_DUAL_OFS 0x0200 /* Set/Clear corresponding bit in Edge Detect Register */ #define GIC_SH_WEDGE_OFS 0x0280 -/* Reset Mask - Disables Interrupt */ -#define GIC_SH_RMASK_31_0_OFS 0x0300 -#define GIC_SH_RMASK_63_32_OFS 0x0304 -#define GIC_SH_RMASK_95_64_OFS 0x0308 -#define GIC_SH_RMASK_127_96_OFS 0x030c -#define GIC_SH_RMASK_159_128_OFS 0x0310 -#define GIC_SH_RMASK_191_160_OFS 0x0314 -#define GIC_SH_RMASK_223_192_OFS 0x0318 -#define GIC_SH_RMASK_255_224_OFS 0x031c - -/* Set Mask (WO) - Enables Interrupt */ -#define GIC_SH_SMASK_31_0_OFS 0x0380 -#define GIC_SH_SMASK_63_32_OFS 0x0384 -#define GIC_SH_SMASK_95_64_OFS 0x0388 -#define GIC_SH_SMASK_127_96_OFS 0x038c -#define GIC_SH_SMASK_159_128_OFS 0x0390 -#define GIC_SH_SMASK_191_160_OFS 0x0394 -#define GIC_SH_SMASK_223_192_OFS 0x0398 -#define GIC_SH_SMASK_255_224_OFS 0x039c +/* Mask manipulation */ +#define GIC_SH_RMASK_OFS 0x0300 +#define GIC_SH_SMASK_OFS 0x0380 /* Global Interrupt Mask Register (RO) - Bit Set == Interrupt enabled */ -#define GIC_SH_MASK_31_0_OFS 0x0400 -#define GIC_SH_MASK_63_32_OFS 0x0404 -#define GIC_SH_MASK_95_64_OFS 0x0408 -#define GIC_SH_MASK_127_96_OFS 0x040c -#define GIC_SH_MASK_159_128_OFS 0x0410 -#define GIC_SH_MASK_191_160_OFS 0x0414 -#define GIC_SH_MASK_223_192_OFS 0x0418 -#define GIC_SH_MASK_255_224_OFS 0x041c +#define GIC_SH_MASK_OFS 0x0400 /* Pending Global Interrupts (RO) */ -#define GIC_SH_PEND_31_0_OFS 0x0480 -#define GIC_SH_PEND_63_32_OFS 0x0484 -#define GIC_SH_PEND_95_64_OFS 0x0488 -#define GIC_SH_PEND_127_96_OFS 0x048c -#define GIC_SH_PEND_159_128_OFS 0x0490 -#define GIC_SH_PEND_191_160_OFS 0x0494 -#define GIC_SH_PEND_223_192_OFS 0x0498 -#define GIC_SH_PEND_255_224_OFS 0x049c - -#define GIC_SH_INTR_MAP_TO_PIN_BASE_OFS 0x0500 +#define GIC_SH_PEND_OFS 0x0480 /* Maps Interrupt X to a Pin */ +#define GIC_SH_INTR_MAP_TO_PIN_BASE_OFS 0x0500 #define GIC_SH_MAP_TO_PIN(intr) (4 * (intr)) -#define GIC_SH_INTR_MAP_TO_VPE_BASE_OFS 0x2000 - /* Maps Interrupt X to a VPE */ +#define GIC_SH_INTR_MAP_TO_VPE_BASE_OFS 0x2000 #define GIC_SH_MAP_TO_VPE_REG_OFF(intr, vpe) \ ((32 * (intr)) + (((vpe) / 32) * 4)) #define GIC_SH_MAP_TO_VPE_REG_BIT(vpe) (1 << ((vpe) % 32)) -/* Convert an interrupt number to a byte offset/bit for multi-word registers */ -#define GIC_INTR_OFS(intr) (((intr) / 32)*4) -#define GIC_INTR_BIT(intr) ((intr) % 32) - -/* Polarity : Reset Value is always 0 */ -#define GIC_SH_SET_POLARITY_OFS 0x0100 - -/* Triggering : Reset Value is always 0 */ -#define GIC_SH_SET_TRIGGER_OFS 0x0180 - -/* Dual edge triggering : Reset Value is always 0 */ -#define GIC_SH_SET_DUAL_OFS 0x0200 - -/* Mask manipulation */ -#define GIC_SH_SMASK_OFS 0x0380 -#define GIC_SH_RMASK_OFS 0x0300 - /* Register Map for Local Section */ #define GIC_VPE_CTL_OFS 0x0000 #define GIC_VPE_PEND_OFS 0x0004 @@ -200,8 +128,8 @@ #define GIC_SH_CONFIG_NUMVPES_SHF 0 #define GIC_SH_CONFIG_NUMVPES_MSK (MSK(8) << GIC_SH_CONFIG_NUMVPES_SHF) -#define GIC_SH_WEDGE_SET(intr) (intr | (0x1 << 31)) -#define GIC_SH_WEDGE_CLR(intr) (intr & ~(0x1 << 31)) +#define GIC_SH_WEDGE_SET(intr) ((intr) | (0x1 << 31)) +#define GIC_SH_WEDGE_CLR(intr) ((intr) & ~(0x1 << 31)) #define GIC_MAP_TO_PIN_SHF 31 #define GIC_MAP_TO_PIN_MSK (MSK(1) << GIC_MAP_TO_PIN_SHF) @@ -278,10 +206,10 @@ #define GIC_CPU_PIN_OFFSET 2 /* Add 2 to convert non-EIC hardware interrupt to EIC vector number. */ -#define GIC_CPU_TO_VEC_OFFSET (2) +#define GIC_CPU_TO_VEC_OFFSET 2 /* Mapped interrupt to pin X, then GIC will generate the vector (X+1). */ -#define GIC_PIN_TO_VEC_OFFSET (1) +#define GIC_PIN_TO_VEC_OFFSET 1 /* Local GIC interrupts. */ #define GIC_LOCAL_INT_WD 0 /* GIC watchdog */ @@ -301,9 +229,6 @@ #define GIC_SHARED_TO_HWIRQ(x) (GIC_SHARED_HWIRQ_BASE + (x)) #define GIC_HWIRQ_TO_SHARED(x) ((x) - GIC_SHARED_HWIRQ_BASE) -#include -#include - extern unsigned int gic_present; extern unsigned int gic_frequency; @@ -322,4 +247,4 @@ extern unsigned int plat_ipi_resched_int_xlate(unsigned int); extern unsigned int gic_get_timer_pending(void); extern int gic_get_c0_compare_int(void); extern int gic_get_c0_perfcount_int(void); -#endif /* _ASM_GICREGS_H */ +#endif /* __LINUX_IRQCHIP_MIPS_GIC_H */ -- cgit v1.2.3 From b0854514537e4e2f0a599ca05d18fe95dcd3ee42 Mon Sep 17 00:00:00 2001 From: Andrew Bresticker Date: Mon, 20 Oct 2014 12:04:01 -0700 Subject: clocksource: mips-gic: Move gic_frequency to clocksource driver There's no reason for gic_frequency to be global any more and it certainly doesn't belong in the GIC irqchip driver, so move it to the GIC clocksource driver. Signed-off-by: Andrew Bresticker Cc: Daniel Lezcano Cc: Thomas Gleixner Cc: Jason Cooper Cc: Paul Burton Cc: Qais Yousef Cc: John Crispin Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/8137/ Signed-off-by: Ralf Baechle --- include/linux/irqchip/mips-gic.h | 1 - 1 file changed, 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/irqchip/mips-gic.h b/include/linux/irqchip/mips-gic.h index 0350effb7ccc..420f77b34d02 100644 --- a/include/linux/irqchip/mips-gic.h +++ b/include/linux/irqchip/mips-gic.h @@ -230,7 +230,6 @@ #define GIC_HWIRQ_TO_SHARED(x) ((x) - GIC_SHARED_HWIRQ_BASE) extern unsigned int gic_present; -extern unsigned int gic_frequency; extern void gic_init(unsigned long gic_base_addr, unsigned long gic_addrspace_size, unsigned int cpu_vec, -- cgit v1.2.3 From 227158db160449b6513d2e31894a135104b90e90 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sun, 6 Apr 2014 18:47:38 -0400 Subject: new helper: skb_copy_and_csum_datagram_msg() Signed-off-by: Al Viro --- include/linux/skbuff.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include/linux') diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 78c299f40bac..cbe4b2078b30 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -2651,6 +2651,11 @@ static inline int skb_copy_datagram_msg(const struct sk_buff *from, int offset, } int skb_copy_and_csum_datagram_iovec(struct sk_buff *skb, int hlen, struct iovec *iov); +static inline int skb_copy_and_csum_datagram_msg(struct sk_buff *skb, int hlen, + struct msghdr *msg) +{ + return skb_copy_and_csum_datagram_iovec(skb, hlen, msg->msg_iov); +} int skb_copy_datagram_from_iovec(struct sk_buff *skb, int offset, const struct iovec *from, int from_offset, int len); -- cgit v1.2.3 From 6ce8e9ce5989ae13f493062975304700be86d20e Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sun, 6 Apr 2014 21:25:44 -0400 Subject: new helper: memcpy_from_msg() Signed-off-by: Al Viro --- include/linux/skbuff.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include/linux') diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index cbe4b2078b30..97dc5f8123b3 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -2687,6 +2687,11 @@ int skb_ensure_writable(struct sk_buff *skb, int write_len); int skb_vlan_pop(struct sk_buff *skb); int skb_vlan_push(struct sk_buff *skb, __be16 vlan_proto, u16 vlan_tci); +static inline int memcpy_from_msg(void *data, struct msghdr *msg, int len) +{ + return memcpy_fromiovec(data, msg->msg_iov, len); +} + struct skb_checksum_ops { __wsum (*update)(const void *mem, int len, __wsum wsum); __wsum (*combine)(__wsum csum, __wsum csum2, int offset, int len); -- cgit v1.2.3 From 7eab8d9e8a722ca07bc785f73e21c3d3418defa6 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sun, 6 Apr 2014 21:51:23 -0400 Subject: new helper: memcpy_to_msg() Signed-off-by: Al Viro --- include/linux/skbuff.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include/linux') diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 97dc5f8123b3..d048347a010a 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -2692,6 +2692,11 @@ static inline int memcpy_from_msg(void *data, struct msghdr *msg, int len) return memcpy_fromiovec(data, msg->msg_iov, len); } +static inline int memcpy_to_msg(struct msghdr *msg, void *data, int len) +{ + return memcpy_toiovec(msg->msg_iov, data, len); +} + struct skb_checksum_ops { __wsum (*update)(const void *mem, int len, __wsum wsum); __wsum (*combine)(__wsum csum, __wsum csum2, int offset, int len); -- cgit v1.2.3 From 3a654f975bf99165016fe257a3d2b4e6716e4931 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Thu, 19 Jun 2014 14:15:22 -0400 Subject: new helpers: skb_copy_datagram_from_iter() and zerocopy_sg_from_iter() Signed-off-by: Al Viro --- include/linux/skbuff.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/linux') diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index d048347a010a..a01cd9ad0b51 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -2659,10 +2659,13 @@ static inline int skb_copy_and_csum_datagram_msg(struct sk_buff *skb, int hlen, int skb_copy_datagram_from_iovec(struct sk_buff *skb, int offset, const struct iovec *from, int from_offset, int len); +int skb_copy_datagram_from_iter(struct sk_buff *skb, int offset, + struct iov_iter *from, int len); int zerocopy_sg_from_iovec(struct sk_buff *skb, const struct iovec *frm, int offset, size_t count); int skb_copy_datagram_iter(const struct sk_buff *from, int offset, struct iov_iter *to, int size); +int zerocopy_sg_from_iter(struct sk_buff *skb, struct iov_iter *frm); void skb_free_datagram(struct sock *sk, struct sk_buff *skb); void skb_free_datagram_locked(struct sock *sk, struct sk_buff *skb); int skb_kill_datagram(struct sock *sk, struct sk_buff *skb, unsigned int flags); -- cgit v1.2.3 From 195e952d03a797aa953f62ffe24ec58693e17ed8 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Thu, 6 Nov 2014 00:56:48 -0500 Subject: kill zerocopy_sg_from_iovec() no users left Signed-off-by: Al Viro --- include/linux/skbuff.h | 2 -- 1 file changed, 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index a01cd9ad0b51..178cdbde82f0 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -2661,8 +2661,6 @@ int skb_copy_datagram_from_iovec(struct sk_buff *skb, int offset, int len); int skb_copy_datagram_from_iter(struct sk_buff *skb, int offset, struct iov_iter *from, int len); -int zerocopy_sg_from_iovec(struct sk_buff *skb, const struct iovec *frm, - int offset, size_t count); int skb_copy_datagram_iter(const struct sk_buff *from, int offset, struct iov_iter *to, int size); int zerocopy_sg_from_iter(struct sk_buff *skb, struct iov_iter *frm); -- cgit v1.2.3 From 8feb2fb2bb986c533e18037d3c45a5f779421992 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Thu, 6 Nov 2014 01:10:59 -0500 Subject: switch AF_PACKET and AF_UNIX to skb_copy_datagram_from_iter() ... and kill skb_copy_datagram_iovec() Signed-off-by: Al Viro --- include/linux/skbuff.h | 3 --- 1 file changed, 3 deletions(-) (limited to 'include/linux') diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 178cdbde82f0..7691ad5b4771 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -2656,9 +2656,6 @@ static inline int skb_copy_and_csum_datagram_msg(struct sk_buff *skb, int hlen, { return skb_copy_and_csum_datagram_iovec(skb, hlen, msg->msg_iov); } -int skb_copy_datagram_from_iovec(struct sk_buff *skb, int offset, - const struct iovec *from, int from_offset, - int len); int skb_copy_datagram_from_iter(struct sk_buff *skb, int offset, struct iov_iter *from, int len); int skb_copy_datagram_iter(const struct sk_buff *from, int offset, -- cgit v1.2.3 From 5d26a105b5a73e5635eae0629b42fa0a90e07b7b Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Thu, 20 Nov 2014 17:05:53 -0800 Subject: crypto: prefix module autoloading with "crypto-" This prefixes all crypto module loading with "crypto-" so we never run the risk of exposing module auto-loading to userspace via a crypto API, as demonstrated by Mathias Krause: https://lkml.org/lkml/2013/3/4/70 Signed-off-by: Kees Cook Signed-off-by: Herbert Xu --- include/linux/crypto.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'include/linux') diff --git a/include/linux/crypto.h b/include/linux/crypto.h index 208a63290b23..9c8776d0ada8 100644 --- a/include/linux/crypto.h +++ b/include/linux/crypto.h @@ -25,6 +25,19 @@ #include #include +/* + * Autoloaded crypto modules should only use a prefixed name to avoid allowing + * arbitrary modules to be loaded. Loading from userspace may still need the + * unprefixed names, so retains those aliases as well. + * This uses __MODULE_INFO directly instead of MODULE_ALIAS because pre-4.3 + * gcc (e.g. avr32 toolchain) uses __LINE__ for uniqueness, and this macro + * expands twice on the same line. Instead, use a separate base name for the + * alias. + */ +#define MODULE_ALIAS_CRYPTO(name) \ + __MODULE_INFO(alias, alias_userspace, name); \ + __MODULE_INFO(alias, alias_crypto, "crypto-" name) + /* * Algorithm masks and types. */ -- cgit v1.2.3 From 394ffa503bc40e32d7f54a9b817264e81ce131b4 Mon Sep 17 00:00:00 2001 From: Gu Zheng Date: Mon, 24 Nov 2014 11:05:22 +0800 Subject: blk: introduce generic io stat accounting help function Many block drivers accounting io stat based on bio (e.g. NVMe...), the blk_account_io_start/end() which is based on request does not make sense to them, so here we introduce the similar help function named generic_start/end_io_acct base on raw sectors, and it can simplify some driver's open io accounting code. Signed-off-by: Gu Zheng Signed-off-by: Jens Axboe --- include/linux/bio.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include/linux') diff --git a/include/linux/bio.h b/include/linux/bio.h index 7347f486ceca..efead0b532c4 100644 --- a/include/linux/bio.h +++ b/include/linux/bio.h @@ -443,6 +443,11 @@ extern struct bio *bio_copy_kern(struct request_queue *, void *, unsigned int, extern void bio_set_pages_dirty(struct bio *bio); extern void bio_check_pages_dirty(struct bio *bio); +void generic_start_io_acct(int rw, unsigned long sectors, + struct hd_struct *part); +void generic_end_io_acct(int rw, struct hd_struct *part, + unsigned long start_time); + #ifndef ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE # error "You should define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE for your platform" #endif -- cgit v1.2.3 From c9eab58f6466cef3d9cd760a96e4de5e060e5195 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Mon, 24 Nov 2014 15:27:17 +0100 Subject: KVM: x86: move device assignment out of kvm_host.h Create a new header, and hide the device assignment functions there. Move struct kvm_assigned_dev_kernel to assigned-dev.c by modifying arch/x86/kvm/iommu.c to take a PCI device struct. Based on a patch by Radim Krcmar . Signed-off-by: Paolo Bonzini --- include/linux/kvm_host.h | 29 ----------------------------- 1 file changed, 29 deletions(-) (limited to 'include/linux') diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index aa56894ce839..231dd9472226 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -718,31 +718,6 @@ struct kvm_irq_ack_notifier { void (*irq_acked)(struct kvm_irq_ack_notifier *kian); }; -struct kvm_assigned_dev_kernel { - struct kvm_irq_ack_notifier ack_notifier; - struct list_head list; - int assigned_dev_id; - int host_segnr; - int host_busnr; - int host_devfn; - unsigned int entries_nr; - int host_irq; - bool host_irq_disabled; - bool pci_2_3; - struct msix_entry *host_msix_entries; - int guest_irq; - struct msix_entry *guest_msix_entries; - unsigned long irq_requested_type; - int irq_source_id; - int flags; - struct pci_dev *dev; - struct kvm *kvm; - spinlock_t intx_lock; - spinlock_t intx_mask_lock; - char irq_name[32]; - struct pci_saved_state *pci_saved_state; -}; - int kvm_irq_map_gsi(struct kvm *kvm, struct kvm_kernel_irq_routing_entry *entries, int gsi); int kvm_irq_map_chip_pin(struct kvm *kvm, unsigned irqchip, unsigned pin); @@ -764,10 +739,6 @@ void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id); #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot); void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot); -int kvm_assign_device(struct kvm *kvm, - struct kvm_assigned_dev_kernel *assigned_dev); -int kvm_deassign_device(struct kvm *kvm, - struct kvm_assigned_dev_kernel *assigned_dev); #else static inline int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot) -- cgit v1.2.3 From 1a867a0898b2e366a1eb5b7fe21413a2b2b1629f Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Tue, 28 Oct 2014 14:24:14 -0400 Subject: sunrpc: add tracepoints in xs_tcp_data_recv Add tracepoints inside the main loop on xs_tcp_data_recv that allow us to keep an eye on what's happening during each phase of it. Signed-off-by: Jeff Layton Signed-off-by: Trond Myklebust --- include/linux/sunrpc/xprtsock.h | 59 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) (limited to 'include/linux') diff --git a/include/linux/sunrpc/xprtsock.h b/include/linux/sunrpc/xprtsock.h index 1ad36cc25b2e..7591788e9fbf 100644 --- a/include/linux/sunrpc/xprtsock.h +++ b/include/linux/sunrpc/xprtsock.h @@ -17,6 +17,65 @@ void cleanup_socket_xprt(void); #define RPC_DEF_MIN_RESVPORT (665U) #define RPC_DEF_MAX_RESVPORT (1023U) +struct sock_xprt { + struct rpc_xprt xprt; + + /* + * Network layer + */ + struct socket * sock; + struct sock * inet; + + /* + * State of TCP reply receive + */ + __be32 tcp_fraghdr, + tcp_xid, + tcp_calldir; + + u32 tcp_offset, + tcp_reclen; + + unsigned long tcp_copied, + tcp_flags; + + /* + * Connection of transports + */ + struct delayed_work connect_worker; + struct sockaddr_storage srcaddr; + unsigned short srcport; + + /* + * UDP socket buffer size parameters + */ + size_t rcvsize, + sndsize; + + /* + * Saved socket callback addresses + */ + void (*old_data_ready)(struct sock *); + void (*old_state_change)(struct sock *); + void (*old_write_space)(struct sock *); + void (*old_error_report)(struct sock *); +}; + +/* + * TCP receive state flags + */ +#define TCP_RCV_LAST_FRAG (1UL << 0) +#define TCP_RCV_COPY_FRAGHDR (1UL << 1) +#define TCP_RCV_COPY_XID (1UL << 2) +#define TCP_RCV_COPY_DATA (1UL << 3) +#define TCP_RCV_READ_CALLDIR (1UL << 4) +#define TCP_RCV_COPY_CALLDIR (1UL << 5) + +/* + * TCP RPC flags + */ +#define TCP_RPC_REPLY (1UL << 6) + #endif /* __KERNEL__ */ #endif /* _LINUX_SUNRPC_XPRTSOCK_H */ -- cgit v1.2.3 From b671358ad7916beb7ca9e5c304ae88afc7da4557 Mon Sep 17 00:00:00 2001 From: Beniamino Galvani Date: Sat, 22 Nov 2014 16:21:39 +0100 Subject: spi: core: Add spi_transfer_is_last() helper This adds the function spi_transfer_is_last() which can be used by drivers to know whether a given transfer is the last one in the current message. Signed-off-by: Beniamino Galvani Signed-off-by: Mark Brown --- include/linux/spi/spi.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'include/linux') diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h index 46d188a9947c..a6ef2a8e6de4 100644 --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h @@ -1049,4 +1049,10 @@ spi_unregister_device(struct spi_device *spi) extern const struct spi_device_id * spi_get_device_id(const struct spi_device *sdev); +static inline bool +spi_transfer_is_last(struct spi_master *master, struct spi_transfer *xfer) +{ + return list_is_last(&xfer->transfer_list, &master->cur_msg->transfers); +} + #endif /* __LINUX_SPI_H */ -- cgit v1.2.3 From 2ad7bf3638411cb547f2823df08166c13ab04269 Mon Sep 17 00:00:00 2001 From: Mahesh Bandewar Date: Sun, 23 Nov 2014 23:07:46 -0800 Subject: ipvlan: Initial check-in of the IPVLAN driver. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This driver is very similar to the macvlan driver except that it uses L3 on the frame to determine the logical interface while functioning as packet dispatcher. It inherits L2 of the master device hence the packets on wire will have the same L2 for all the packets originating from all virtual devices off of the same master device. This driver was developed keeping the namespace use-case in mind. Hence most of the examples given here take that as the base setup where main-device belongs to the default-ns and virtual devices are assigned to the additional namespaces. The device operates in two different modes and the difference in these two modes in primarily in the TX side. (a) L2 mode : In this mode, the device behaves as a L2 device. TX processing upto L2 happens on the stack of the virtual device associated with (namespace). Packets are switched after that into the main device (default-ns) and queued for xmit. RX processing is simple and all multicast, broadcast (if applicable), and unicast belonging to the address(es) are delivered to the virtual devices. (b) L3 mode : In this mode, the device behaves like a L3 device. TX processing upto L3 happens on the stack of the virtual device associated with (namespace). Packets are switched to the main-device (default-ns) for the L2 processing. Hence the routing table of the default-ns will be used in this mode. RX processins is somewhat similar to the L2 mode except that in this mode only Unicast packets are delivered to the virtual device while main-dev will handle all other packets. The devices can be added using the "ip" command from the iproute2 package - ip link add link type ipvlan mode [ l2 | l3 ] Signed-off-by: Mahesh Bandewar Cc: Eric Dumazet Cc: Maciej Żenczykowski Cc: Laurent Chavey Cc: Tim Hockin Cc: Brandon Philips Cc: Pavel Emelianov Signed-off-by: David S. Miller --- include/linux/netdevice.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include/linux') diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 5cd508787572..2cb772495f7a 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -1230,6 +1230,8 @@ enum netdev_priv_flags { IFF_LIVE_ADDR_CHANGE = 1<<20, IFF_MACVLAN = 1<<21, IFF_XMIT_DST_RELEASE_PERM = 1<<22, + IFF_IPVLAN_MASTER = 1<<23, + IFF_IPVLAN_SLAVE = 1<<24, }; #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN @@ -1255,6 +1257,8 @@ enum netdev_priv_flags { #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE #define IFF_MACVLAN IFF_MACVLAN #define IFF_XMIT_DST_RELEASE_PERM IFF_XMIT_DST_RELEASE_PERM +#define IFF_IPVLAN_MASTER IFF_IPVLAN_MASTER +#define IFF_IPVLAN_SLAVE IFF_IPVLAN_SLAVE /** * struct net_device - The DEVICE structure. -- cgit v1.2.3 From cb1410c71e0b6b2eba8c1890645a76ff86169d24 Mon Sep 17 00:00:00 2001 From: Weston Andros Adamson Date: Wed, 12 Nov 2014 12:08:00 -0500 Subject: NFS: fix subtle change in COMMIT behavior Recent work in the pgio layer made it possible for there to be more than one request per page. This caused a subtle change in commit behavior, because write.c:nfs_commit_unstable_pages compares the number of *pages* waiting for writeback against the number of requests on a commit list to choose when to send a COMMIT in a non-blocking flush. This is probably hard to hit in normal operation - you have to be using rsize/wsize < PAGE_SIZE, or pnfs with lots of boundaries that are not page aligned to have a noticeable change in behavior. Signed-off-by: Weston Andros Adamson Signed-off-by: Trond Myklebust --- include/linux/nfs_fs.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h index c72d1ad41ad4..6d627b92df53 100644 --- a/include/linux/nfs_fs.h +++ b/include/linux/nfs_fs.h @@ -163,7 +163,7 @@ struct nfs_inode { */ __be32 cookieverf[2]; - unsigned long npages; + unsigned long nrequests; struct nfs_mds_commit_info commit_info; /* Open contexts for shared mmap writes */ @@ -520,7 +520,7 @@ extern void nfs_commit_free(struct nfs_commit_data *data); static inline int nfs_have_writebacks(struct inode *inode) { - return NFS_I(inode)->npages != 0; + return NFS_I(inode)->nrequests != 0; } /* -- cgit v1.2.3 From 10b89567db51e143c2f0828839332502916d012d Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Mon, 17 Nov 2014 16:58:03 -0500 Subject: lockd: eliminate LOCKD_DEBUG LOCKD_DEBUG is always the same value as CONFIG_SUNRPC_DEBUG, so we can just use it instead. Signed-off-by: Jeff Layton Signed-off-by: Trond Myklebust --- include/linux/lockd/debug.h | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) (limited to 'include/linux') diff --git a/include/linux/lockd/debug.h b/include/linux/lockd/debug.h index 257d3779f2ab..0ca8109934e4 100644 --- a/include/linux/lockd/debug.h +++ b/include/linux/lockd/debug.h @@ -17,12 +17,8 @@ * Enable lockd debugging. * Requires RPC_DEBUG. */ -#ifdef RPC_DEBUG -# define LOCKD_DEBUG 1 -#endif - #undef ifdebug -#if defined(RPC_DEBUG) && defined(LOCKD_DEBUG) +#if IS_ENABLED(CONFIG_SUNRPC_DEBUG) # define ifdebug(flag) if (unlikely(nlm_debug & NLMDBG_##flag)) #else # define ifdebug(flag) if (0) -- cgit v1.2.3 From b53a2340d0d30468b7315992ba77fe188c3bc5c8 Mon Sep 17 00:00:00 2001 From: Pantelis Antoniou Date: Tue, 28 Oct 2014 22:33:53 +0200 Subject: of/reconfig: Add of_reconfig_get_state_change() of notifier helper. Introduce of_reconfig_get_state_change() which allows an of notifier to query about device state changes. Signed-off-by: Pantelis Antoniou Signed-off-by: Grant Likely --- include/linux/of.h | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'include/linux') diff --git a/include/linux/of.h b/include/linux/of.h index 27635c89d8c2..8e3a264c869c 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -327,6 +327,7 @@ struct of_prop_reconfig { extern int of_reconfig_notifier_register(struct notifier_block *); extern int of_reconfig_notifier_unregister(struct notifier_block *); extern int of_reconfig_notify(unsigned long, void *); +extern int of_reconfig_get_state_change(unsigned long action, void *arg); extern int of_attach_node(struct device_node *); extern int of_detach_node(struct device_node *); @@ -887,6 +888,12 @@ struct of_changeset { struct list_head entries; }; +enum of_reconfig_change { + OF_RECONFIG_NO_CHANGE = 0, + OF_RECONFIG_CHANGE_ADD, + OF_RECONFIG_CHANGE_REMOVE, +}; + #ifdef CONFIG_OF_DYNAMIC extern void of_changeset_init(struct of_changeset *ocs); extern void of_changeset_destroy(struct of_changeset *ocs); -- cgit v1.2.3 From f6892d193fb9d694a1b50550649ba6e82f8abec1 Mon Sep 17 00:00:00 2001 From: Grant Likely Date: Fri, 21 Nov 2014 15:14:58 +0000 Subject: of/reconfig: Add empty stubs for the of_reconfig methods To simplify subsystem setup code, make empty stubs for the of_reconfig_*() methods. This is particularly useful for registering and unregistering the notifiers so that it doesn't impact the flow of the subsystem setup code. Signed-off-by: Grant Likely --- include/linux/of.h | 29 +++++++++++++++++++++++------ 1 file changed, 23 insertions(+), 6 deletions(-) (limited to 'include/linux') diff --git a/include/linux/of.h b/include/linux/of.h index 8e3a264c869c..b59ee21933a4 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -324,11 +324,6 @@ struct of_prop_reconfig { struct property *old_prop; }; -extern int of_reconfig_notifier_register(struct notifier_block *); -extern int of_reconfig_notifier_unregister(struct notifier_block *); -extern int of_reconfig_notify(unsigned long, void *); -extern int of_reconfig_get_state_change(unsigned long action, void *arg); - extern int of_attach_node(struct device_node *); extern int of_detach_node(struct device_node *); @@ -895,6 +890,11 @@ enum of_reconfig_change { }; #ifdef CONFIG_OF_DYNAMIC +extern int of_reconfig_notifier_register(struct notifier_block *); +extern int of_reconfig_notifier_unregister(struct notifier_block *); +extern int of_reconfig_notify(unsigned long, void *); +extern int of_reconfig_get_state_change(unsigned long action, void *arg); + extern void of_changeset_init(struct of_changeset *ocs); extern void of_changeset_destroy(struct of_changeset *ocs); extern int of_changeset_apply(struct of_changeset *ocs); @@ -932,7 +932,24 @@ static inline int of_changeset_update_property(struct of_changeset *ocs, { return of_changeset_action(ocs, OF_RECONFIG_UPDATE_PROPERTY, np, prop); } -#endif +#else /* CONFIG_OF_DYNAMIC */ +static inline int of_reconfig_notifier_register(struct notifier_block *nb) +{ + return -EINVAL; +} +static inline int of_reconfig_notifier_unregister(struct notifier_block *nb) +{ + return -EINVAL; +} +static inline int of_reconfig_notify(unsigned long action, void *arg) +{ + return -EINVAL; +} +static inline int of_reconfig_get_state_change(unsigned long action, void *arg) +{ + return -EINVAL; +} +#endif /* CONFIG_OF_DYNAMIC */ /* CONFIG_OF_RESOLVE api */ extern int of_resolve_phandles(struct device_node *tree); -- cgit v1.2.3 From f5242e5a883bf1c1aba6bfd87b85e7dda0e62191 Mon Sep 17 00:00:00 2001 From: Grant Likely Date: Mon, 24 Nov 2014 17:58:01 +0000 Subject: of/reconfig: Always use the same structure for notifiers The OF_RECONFIG notifier callback uses a different structure depending on whether it is a node change or a property change. This is silly, and not very safe. Rework the code to use the same data structure regardless of the type of notifier. Signed-off-by: Grant Likely Cc: Benjamin Herrenschmidt Cc: Rob Herring Cc: Pantelis Antoniou Cc: --- include/linux/of.h | 23 +++++++++++++---------- 1 file changed, 13 insertions(+), 10 deletions(-) (limited to 'include/linux') diff --git a/include/linux/of.h b/include/linux/of.h index b59ee21933a4..fe1dec87fd68 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -73,6 +73,12 @@ struct of_phandle_args { uint32_t args[MAX_PHANDLE_ARGS]; }; +struct of_reconfig_data { + struct device_node *dn; + struct property *prop; + struct property *old_prop; +}; + /* initialize a node */ extern struct kobj_type of_node_ktype; static inline void of_node_init(struct device_node *node) @@ -318,12 +324,6 @@ extern int of_update_property(struct device_node *np, struct property *newprop); #define OF_RECONFIG_REMOVE_PROPERTY 0x0004 #define OF_RECONFIG_UPDATE_PROPERTY 0x0005 -struct of_prop_reconfig { - struct device_node *dn; - struct property *prop; - struct property *old_prop; -}; - extern int of_attach_node(struct device_node *); extern int of_detach_node(struct device_node *); @@ -892,8 +892,9 @@ enum of_reconfig_change { #ifdef CONFIG_OF_DYNAMIC extern int of_reconfig_notifier_register(struct notifier_block *); extern int of_reconfig_notifier_unregister(struct notifier_block *); -extern int of_reconfig_notify(unsigned long, void *); -extern int of_reconfig_get_state_change(unsigned long action, void *arg); +extern int of_reconfig_notify(unsigned long, struct of_reconfig_data *rd); +extern int of_reconfig_get_state_change(unsigned long action, + struct of_reconfig_data *arg); extern void of_changeset_init(struct of_changeset *ocs); extern void of_changeset_destroy(struct of_changeset *ocs); @@ -941,11 +942,13 @@ static inline int of_reconfig_notifier_unregister(struct notifier_block *nb) { return -EINVAL; } -static inline int of_reconfig_notify(unsigned long action, void *arg) +static inline int of_reconfig_notify(unsigned long action, + struct of_reconfig_data *arg) { return -EINVAL; } -static inline int of_reconfig_get_state_change(unsigned long action, void *arg) +static inline int of_reconfig_get_state_change(unsigned long action, + struct of_reconfig_data *arg) { return -EINVAL; } -- cgit v1.2.3 From 801d728c10db4b28e01590b46bf1f0df930760cc Mon Sep 17 00:00:00 2001 From: Pantelis Antoniou Date: Tue, 28 Oct 2014 22:36:01 +0200 Subject: of/reconfig: Add OF_DYNAMIC notifier for platform_bus_type Add OF notifier handler needed for creating/destroying platform devices according to dynamic runtime changes in the DT live tree. Signed-off-by: Pantelis Antoniou Signed-off-by: Grant Likely --- include/linux/of_platform.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'include/linux') diff --git a/include/linux/of_platform.h b/include/linux/of_platform.h index c2b0627a2317..8a860f096c35 100644 --- a/include/linux/of_platform.h +++ b/include/linux/of_platform.h @@ -84,4 +84,10 @@ static inline int of_platform_populate(struct device_node *root, static inline void of_platform_depopulate(struct device *parent) { } #endif +#ifdef CONFIG_OF_DYNAMIC +extern void of_platform_register_reconfig_notifier(void); +#else +static inline void of_platform_register_reconfig_notifier(void) { } +#endif + #endif /* _LINUX_OF_PLATFORM_H */ -- cgit v1.2.3 From 7518b5890d8ac366faa2326ce2356ef6392ce63d Mon Sep 17 00:00:00 2001 From: Pantelis Antoniou Date: Tue, 28 Oct 2014 22:35:58 +0200 Subject: of/overlay: Introduce DT overlay support Overlays are a method to dynamically modify part of the kernel's device tree with dynamically loaded data. Add the core functionality to parse, apply and remove an overlay changeset. The core functionality takes care of managing the overlay data format and performing the add and remove. Drivers are expected to use the overlay functionality to support custom expansion busses commonly found on consumer development boards like the BeagleBone or Raspberry Pi. The overlay code uses CONFIG_OF_DYNAMIC changesets to perform the low level work of modifying the devicetree. Documentation about internal and APIs is provided in Documentation/devicetree/overlay-notes.txt v2: - Switch from __of_node_alloc() to __of_node_dup() - Documentation fixups - Remove 2-pass processing of properties - Remove separate ov_lock; just use the DT mutex. v1: - Drop delete capability using '-' prefix. The '-' prefixed names are valid properties and nodes and there is no need for it just yet. - Do not update special properties - name & phandle ones. - Change order of node attachment, so that the special property update works. Signed-off-by: Pantelis Antoniou Signed-off-by: Grant Likely --- include/linux/of.h | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) (limited to 'include/linux') diff --git a/include/linux/of.h b/include/linux/of.h index fe1dec87fd68..aa01cf5852f8 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -23,6 +23,7 @@ #include #include #include +#include #include #include @@ -957,4 +958,34 @@ static inline int of_reconfig_get_state_change(unsigned long action, /* CONFIG_OF_RESOLVE api */ extern int of_resolve_phandles(struct device_node *tree); +/** + * Overlay support + */ + +#ifdef CONFIG_OF_OVERLAY + +/* ID based overlays; the API for external users */ +int of_overlay_create(struct device_node *tree); +int of_overlay_destroy(int id); +int of_overlay_destroy_all(void); + +#else + +static inline int of_overlay_create(struct device_node *tree) +{ + return -ENOTSUPP; +} + +static inline int of_overlay_destroy(int id) +{ + return -ENOTSUPP; +} + +static inline int of_overlay_destroy_all(void) +{ + return -ENOTSUPP; +} + +#endif + #endif /* _LINUX_OF_H */ -- cgit v1.2.3 From f895b252d4edf66b2895fb5a7b17a638665f3e1f Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Mon, 17 Nov 2014 16:58:04 -0500 Subject: sunrpc: eliminate RPC_DEBUG It's always set to whatever CONFIG_SUNRPC_DEBUG is, so just use that. Signed-off-by: Jeff Layton Signed-off-by: Trond Myklebust --- include/linux/sunrpc/auth.h | 2 +- include/linux/sunrpc/debug.h | 9 +++------ include/linux/sunrpc/sched.h | 8 ++++---- 3 files changed, 8 insertions(+), 11 deletions(-) (limited to 'include/linux') diff --git a/include/linux/sunrpc/auth.h b/include/linux/sunrpc/auth.h index 8e030075fe79..a7cbb570cc5c 100644 --- a/include/linux/sunrpc/auth.h +++ b/include/linux/sunrpc/auth.h @@ -53,7 +53,7 @@ struct rpc_cred { struct rcu_head cr_rcu; struct rpc_auth * cr_auth; const struct rpc_credops *cr_ops; -#ifdef RPC_DEBUG +#if IS_ENABLED(CONFIG_SUNRPC_DEBUG) unsigned long cr_magic; /* 0x0f4aa4f0 */ #endif unsigned long cr_expire; /* when to gc */ diff --git a/include/linux/sunrpc/debug.h b/include/linux/sunrpc/debug.h index 9385bd74c860..51143757b8f7 100644 --- a/include/linux/sunrpc/debug.h +++ b/include/linux/sunrpc/debug.h @@ -14,9 +14,6 @@ /* * Enable RPC debugging/profiling. */ -#ifdef CONFIG_SUNRPC_DEBUG -#define RPC_DEBUG -#endif #ifdef CONFIG_TRACEPOINTS #define RPC_TRACEPOINTS #endif @@ -25,7 +22,7 @@ /* * Debugging macros etc */ -#ifdef RPC_DEBUG +#if IS_ENABLED(CONFIG_SUNRPC_DEBUG) extern unsigned int rpc_debug; extern unsigned int nfs_debug; extern unsigned int nfsd_debug; @@ -36,7 +33,7 @@ extern unsigned int nlm_debug; #define dprintk_rcu(args...) dfprintk_rcu(FACILITY, ## args) #undef ifdebug -#ifdef RPC_DEBUG +#if IS_ENABLED(CONFIG_SUNRPC_DEBUG) # define ifdebug(fac) if (unlikely(rpc_debug & RPCDBG_##fac)) # define dfprintk(fac, args...) \ @@ -65,7 +62,7 @@ extern unsigned int nlm_debug; /* * Sysctl interface for RPC debugging */ -#ifdef RPC_DEBUG +#if IS_ENABLED(CONFIG_SUNRPC_DEBUG) void rpc_register_sysctl(void); void rpc_unregister_sysctl(void); #endif diff --git a/include/linux/sunrpc/sched.h b/include/linux/sunrpc/sched.h index 1a8959944c5f..fecdbf1b4797 100644 --- a/include/linux/sunrpc/sched.h +++ b/include/linux/sunrpc/sched.h @@ -79,7 +79,7 @@ struct rpc_task { unsigned short tk_flags; /* misc flags */ unsigned short tk_timeouts; /* maj timeouts */ -#if defined(RPC_DEBUG) || defined(RPC_TRACEPOINTS) +#if IS_ENABLED(CONFIG_SUNRPC_DEBUG) || defined(RPC_TRACEPOINTS) unsigned short tk_pid; /* debugging aid */ #endif unsigned char tk_priority : 2,/* Task priority */ @@ -187,7 +187,7 @@ struct rpc_wait_queue { unsigned char nr; /* # tasks remaining for cookie */ unsigned short qlen; /* total # tasks waiting in queue */ struct rpc_timer timer_list; -#if defined(RPC_DEBUG) || defined(RPC_TRACEPOINTS) +#if IS_ENABLED(CONFIG_SUNRPC_DEBUG) || defined(RPC_TRACEPOINTS) const char * name; #endif }; @@ -237,7 +237,7 @@ void rpc_free(void *); int rpciod_up(void); void rpciod_down(void); int __rpc_wait_for_completion_task(struct rpc_task *task, wait_bit_action_f *); -#ifdef RPC_DEBUG +#if IS_ENABLED(CONFIG_SUNRPC_DEBUG) struct net; void rpc_show_tasks(struct net *); #endif @@ -251,7 +251,7 @@ static inline int rpc_wait_for_completion_task(struct rpc_task *task) return __rpc_wait_for_completion_task(task, NULL); } -#if defined(RPC_DEBUG) || defined (RPC_TRACEPOINTS) +#if IS_ENABLED(CONFIG_SUNRPC_DEBUG) || defined (RPC_TRACEPOINTS) static inline const char * rpc_qname(const struct rpc_wait_queue *q) { return ((q && q->name) ? q->name : "unknown"); -- cgit v1.2.3 From 1306729b0d4f4a0bd0d098711ed3d938dc5a1a28 Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Mon, 17 Nov 2014 16:58:05 -0500 Subject: sunrpc: eliminate RPC_TRACEPOINTS It's always set to the same value as CONFIG_TRACEPOINTS, so we can just use that instead. Signed-off-by: Jeff Layton Signed-off-by: Trond Myklebust --- include/linux/sunrpc/debug.h | 9 --------- include/linux/sunrpc/sched.h | 6 +++--- 2 files changed, 3 insertions(+), 12 deletions(-) (limited to 'include/linux') diff --git a/include/linux/sunrpc/debug.h b/include/linux/sunrpc/debug.h index 51143757b8f7..43f38ee9668c 100644 --- a/include/linux/sunrpc/debug.h +++ b/include/linux/sunrpc/debug.h @@ -10,15 +10,6 @@ #include - -/* - * Enable RPC debugging/profiling. - */ -#ifdef CONFIG_TRACEPOINTS -#define RPC_TRACEPOINTS -#endif -/* #define RPC_PROFILE */ - /* * Debugging macros etc */ diff --git a/include/linux/sunrpc/sched.h b/include/linux/sunrpc/sched.h index fecdbf1b4797..5f1e6bd4c316 100644 --- a/include/linux/sunrpc/sched.h +++ b/include/linux/sunrpc/sched.h @@ -79,7 +79,7 @@ struct rpc_task { unsigned short tk_flags; /* misc flags */ unsigned short tk_timeouts; /* maj timeouts */ -#if IS_ENABLED(CONFIG_SUNRPC_DEBUG) || defined(RPC_TRACEPOINTS) +#if IS_ENABLED(CONFIG_SUNRPC_DEBUG) || IS_ENABLED(CONFIG_TRACEPOINTS) unsigned short tk_pid; /* debugging aid */ #endif unsigned char tk_priority : 2,/* Task priority */ @@ -187,7 +187,7 @@ struct rpc_wait_queue { unsigned char nr; /* # tasks remaining for cookie */ unsigned short qlen; /* total # tasks waiting in queue */ struct rpc_timer timer_list; -#if IS_ENABLED(CONFIG_SUNRPC_DEBUG) || defined(RPC_TRACEPOINTS) +#if IS_ENABLED(CONFIG_SUNRPC_DEBUG) || IS_ENABLED(CONFIG_TRACEPOINTS) const char * name; #endif }; @@ -251,7 +251,7 @@ static inline int rpc_wait_for_completion_task(struct rpc_task *task) return __rpc_wait_for_completion_task(task, NULL); } -#if IS_ENABLED(CONFIG_SUNRPC_DEBUG) || defined (RPC_TRACEPOINTS) +#if IS_ENABLED(CONFIG_SUNRPC_DEBUG) || IS_ENABLED(CONFIG_TRACEPOINTS) static inline const char * rpc_qname(const struct rpc_wait_queue *q) { return ((q && q->name) ? q->name : "unknown"); -- cgit v1.2.3 From bf4bea8e9a9058319a19f8c2710a6f0ef2459983 Mon Sep 17 00:00:00 2001 From: Ard Biesheuvel Date: Mon, 10 Nov 2014 08:33:56 +0000 Subject: kvm: fix kvm_is_mmio_pfn() and rename to kvm_is_reserved_pfn() This reverts commit 85c8555ff0 ("KVM: check for !is_zero_pfn() in kvm_is_mmio_pfn()") and renames the function to kvm_is_reserved_pfn. The problem being addressed by the patch above was that some ARM code based the memory mapping attributes of a pfn on the return value of kvm_is_mmio_pfn(), whose name indeed suggests that such pfns should be mapped as device memory. However, kvm_is_mmio_pfn() doesn't do quite what it says on the tin, and the existing non-ARM users were already using it in a way which suggests that its name should probably have been 'kvm_is_reserved_pfn' from the beginning, e.g., whether or not to call get_page/put_page on it etc. This means that returning false for the zero page is a mistake and the patch above should be reverted. Signed-off-by: Ard Biesheuvel Signed-off-by: Marc Zyngier --- include/linux/kvm_host.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index ea53b04993f2..a6059bdf7b03 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -703,7 +703,7 @@ void kvm_arch_sync_events(struct kvm *kvm); int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu); void kvm_vcpu_kick(struct kvm_vcpu *vcpu); -bool kvm_is_mmio_pfn(pfn_t pfn); +bool kvm_is_reserved_pfn(pfn_t pfn); struct kvm_irq_ack_notifier { struct hlist_node link; -- cgit v1.2.3 From 1050dcda3052912984b26fb6d2695a3f41792000 Mon Sep 17 00:00:00 2001 From: Ard Biesheuvel Date: Mon, 17 Nov 2014 14:58:51 +0000 Subject: kvm: add a memslot flag for incoherent memory regions Memory regions may be incoherent with the caches, typically when the guest has mapped a host system RAM backed memory region as uncached. Add a flag KVM_MEMSLOT_INCOHERENT so that we can tag these memslots and handle them appropriately when mapping them. Signed-off-by: Ard Biesheuvel Signed-off-by: Marc Zyngier --- include/linux/kvm_host.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index a6059bdf7b03..e4d8f705fecd 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -43,6 +43,7 @@ * include/linux/kvm_h. */ #define KVM_MEMSLOT_INVALID (1UL << 16) +#define KVM_MEMSLOT_INCOHERENT (1UL << 17) /* Two fragments for cross MMIO pages. */ #define KVM_MAX_MMIO_FRAGMENTS 2 -- cgit v1.2.3 From edef1297f33a4546559d905457b435a5ea160bab Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Sat, 8 Nov 2014 20:15:09 -0500 Subject: SUNRPC: serialize iostats updates Occasionally mountstats reports a negative retransmission rate. Ensure that two RPCs completing concurrently don't confuse the sums in the transport's op_metrics array. Since pNFS filelayout can invoke rpc_count_iostats() on another transport from xprt_release(), we can't rely on simply holding the transport_lock in xprt_release(). There's nothing for it but hard serialization. One spin lock per RPC operation should make this as painless as it can be. Signed-off-by: Chuck Lever Signed-off-by: Anna Schumaker --- include/linux/sunrpc/metrics.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/linux') diff --git a/include/linux/sunrpc/metrics.h b/include/linux/sunrpc/metrics.h index 1565bbe86d51..eecb5a71e6c0 100644 --- a/include/linux/sunrpc/metrics.h +++ b/include/linux/sunrpc/metrics.h @@ -27,10 +27,13 @@ #include #include +#include #define RPC_IOSTATS_VERS "1.0" struct rpc_iostats { + spinlock_t om_lock; + /* * These counters give an idea about how many request * transmissions are required, on average, to complete that -- cgit v1.2.3 From f4ac1674f5da420ef17896f0f222c5215ebcde80 Mon Sep 17 00:00:00 2001 From: Anna Schumaker Date: Tue, 25 Nov 2014 13:18:15 -0500 Subject: nfs: Add ALLOCATE support This patch adds support for using the NFS v4.2 operation ALLOCATE to preallocate data in a file. Signed-off-by: Anna Schumaker Signed-off-by: Trond Myklebust --- include/linux/nfs4.h | 1 + include/linux/nfs_fs_sb.h | 1 + include/linux/nfs_xdr.h | 14 ++++++++++++++ 3 files changed, 16 insertions(+) (limited to 'include/linux') diff --git a/include/linux/nfs4.h b/include/linux/nfs4.h index 356acc2846fd..2b28a21edcd0 100644 --- a/include/linux/nfs4.h +++ b/include/linux/nfs4.h @@ -490,6 +490,7 @@ enum { /* nfs42 */ NFSPROC4_CLNT_SEEK, + NFSPROC4_CLNT_ALLOCATE, }; /* nfs41 types */ diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h index a32ba0d7a98f..df6ed429b406 100644 --- a/include/linux/nfs_fs_sb.h +++ b/include/linux/nfs_fs_sb.h @@ -231,5 +231,6 @@ struct nfs_server { #define NFS_CAP_ATOMIC_OPEN_V1 (1U << 17) #define NFS_CAP_SECURITY_LABEL (1U << 18) #define NFS_CAP_SEEK (1U << 19) +#define NFS_CAP_ALLOCATE (1U << 20) #endif diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h index 47ebb4fafd87..467c84efb596 100644 --- a/include/linux/nfs_xdr.h +++ b/include/linux/nfs_xdr.h @@ -1243,6 +1243,20 @@ nfs_free_pnfs_ds_cinfo(struct pnfs_ds_commit_info *cinfo) #endif /* CONFIG_NFS_V4_1 */ #ifdef CONFIG_NFS_V4_2 +struct nfs42_falloc_args { + struct nfs4_sequence_args seq_args; + + struct nfs_fh *falloc_fh; + nfs4_stateid falloc_stateid; + u64 falloc_offset; + u64 falloc_length; +}; + +struct nfs42_falloc_res { + struct nfs4_sequence_res seq_res; + unsigned int status; +}; + struct nfs42_seek_args { struct nfs4_sequence_args seq_args; -- cgit v1.2.3 From 624bd5b7b683c978c6d5f4e9f6142cfb3470983d Mon Sep 17 00:00:00 2001 From: Anna Schumaker Date: Tue, 25 Nov 2014 13:18:16 -0500 Subject: nfs: Add DEALLOCATE support This patch adds support for using the NFS v4.2 operation DEALLOCATE to punch holes in a file. Signed-off-by: Anna Schumaker Signed-off-by: Trond Myklebust --- include/linux/nfs4.h | 1 + include/linux/nfs_fs_sb.h | 1 + 2 files changed, 2 insertions(+) (limited to 'include/linux') diff --git a/include/linux/nfs4.h b/include/linux/nfs4.h index 2b28a21edcd0..022b761dbf0a 100644 --- a/include/linux/nfs4.h +++ b/include/linux/nfs4.h @@ -491,6 +491,7 @@ enum { /* nfs42 */ NFSPROC4_CLNT_SEEK, NFSPROC4_CLNT_ALLOCATE, + NFSPROC4_CLNT_DEALLOCATE, }; /* nfs41 types */ diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h index df6ed429b406..1e37fbb78f7a 100644 --- a/include/linux/nfs_fs_sb.h +++ b/include/linux/nfs_fs_sb.h @@ -232,5 +232,6 @@ struct nfs_server { #define NFS_CAP_SECURITY_LABEL (1U << 18) #define NFS_CAP_SEEK (1U << 19) #define NFS_CAP_ALLOCATE (1U << 20) +#define NFS_CAP_DEALLOCATE (1U << 21) #endif -- cgit v1.2.3 From 3ffb1a8193bead7bf4ef0fec2dae050c70e4c1c1 Mon Sep 17 00:00:00 2001 From: Kevin Cernekee Date: Wed, 12 Nov 2014 12:53:59 -0800 Subject: serial: core: Add big-endian iotype Since most drivers interpret UPIO_MEM32 to mean "little-endian" and use readl/writel to access the registers, add a parallel UPIO_MEM32BE to request the use of big-endian MMIO accessors (ioread32be/iowrite32be). Signed-off-by: Kevin Cernekee Signed-off-by: Greg Kroah-Hartman --- include/linux/serial_core.h | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) (limited to 'include/linux') diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h index 3231a43f6acf..057038cf2788 100644 --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -142,12 +142,13 @@ struct uart_port { unsigned char iotype; /* io access style */ unsigned char unused1; -#define UPIO_PORT (0) -#define UPIO_HUB6 (1) -#define UPIO_MEM (2) -#define UPIO_MEM32 (3) -#define UPIO_AU (4) /* Au1x00 and RT288x type IO */ -#define UPIO_TSI (5) /* Tsi108/109 type IO */ +#define UPIO_PORT (0) /* 8b I/O port access */ +#define UPIO_HUB6 (1) /* Hub6 ISA card */ +#define UPIO_MEM (2) /* 8b MMIO access */ +#define UPIO_MEM32 (3) /* 32b little endian */ +#define UPIO_MEM32BE (4) /* 32b big endian */ +#define UPIO_AU (5) /* Au1x00 and RT288x type IO */ +#define UPIO_TSI (6) /* Tsi108/109 type IO */ unsigned int read_status_mask; /* driver specific */ unsigned int ignore_status_mask; /* driver specific */ -- cgit v1.2.3 From 641519cb61bc766c3b4a70fd9ef14fc9509bf8bf Mon Sep 17 00:00:00 2001 From: Brian Norris Date: Tue, 4 Nov 2014 11:32:45 -0800 Subject: mtd: nand: add ATO manufacturer info Tested with ATO AFND1G08U3, 128MiB NAND. Signed-off-by: Brian Norris --- include/linux/mtd/nand.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h index b14d190b593a..3d4ea7eb2b68 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -736,6 +736,7 @@ struct nand_chip { #define NAND_MFR_EON 0x92 #define NAND_MFR_SANDISK 0x45 #define NAND_MFR_INTEL 0x89 +#define NAND_MFR_ATO 0x9b /* The maximum expected count of bytes in the NAND ID sequence */ #define NAND_MAX_ID_LEN 8 -- cgit v1.2.3 From f5c1434c217fd72ac0d24d3142d09e49a3d4e72e Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Mon, 24 Nov 2014 14:35:10 +0000 Subject: irqchip: GICv3: rework redistributor structure The basic GICv3 driver has almost no use for the redistributor (other than the basic per-CPU interrupts), but the ITS needs a lot more from them. As such, rework the set of data structures. The behaviour of the GICv3 driver is otherwise unaffected. Signed-off-by: Marc Zyngier Link: https://lkml.kernel.org/r/1416839720-18400-4-git-send-email-marc.zyngier@arm.com Signed-off-by: Jason Cooper --- include/linux/irqchip/arm-gic-v3.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'include/linux') diff --git a/include/linux/irqchip/arm-gic-v3.h b/include/linux/irqchip/arm-gic-v3.h index 03a4ea37ba86..040615a48bf5 100644 --- a/include/linux/irqchip/arm-gic-v3.h +++ b/include/linux/irqchip/arm-gic-v3.h @@ -49,6 +49,10 @@ #define GICD_CTLR_ENABLE_G1A (1U << 1) #define GICD_CTLR_ENABLE_G1 (1U << 0) +#define GICD_TYPER_ID_BITS(typer) ((((typer) >> 19) & 0x1f) + 1) +#define GICD_TYPER_IRQS(typer) ((((typer) & 0x1f) + 1) * 32) +#define GICD_TYPER_LPIS (1U << 17) + #define GICD_IROUTER_SPI_MODE_ONE (0U << 31) #define GICD_IROUTER_SPI_MODE_ANY (1U << 31) @@ -189,6 +193,17 @@ #include +struct rdists { + struct { + void __iomem *rd_base; + struct page *pend_page; + phys_addr_t phys_base; + } __percpu *rdist; + struct page *prop_page; + int id_bits; + u64 flags; +}; + static inline void gic_write_eoir(u64 irq) { asm volatile("msr_s " __stringify(ICC_EOIR1_EL1) ", %0" : : "r" (irq)); -- cgit v1.2.3 From cc2d3216f53c9fff0030eb71cacc4ce5f39d1d7e Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Mon, 24 Nov 2014 14:35:11 +0000 Subject: irqchip: GICv3: ITS command queue The ITS is configured through a number commands that the driver issues to the HW using a memory-based circular buffer. This patch implements the subset of commands that are required for Linux. Signed-off-by: Marc Zyngier Link: https://lkml.kernel.org/r/1416839720-18400-5-git-send-email-marc.zyngier@arm.com Signed-off-by: Jason Cooper --- include/linux/irqchip/arm-gic-v3.h | 102 +++++++++++++++++++++++++++++++++++++ 1 file changed, 102 insertions(+) (limited to 'include/linux') diff --git a/include/linux/irqchip/arm-gic-v3.h b/include/linux/irqchip/arm-gic-v3.h index 040615a48bf5..21c9d70426d1 100644 --- a/include/linux/irqchip/arm-gic-v3.h +++ b/include/linux/irqchip/arm-gic-v3.h @@ -80,9 +80,27 @@ #define GICR_MOVALLR 0x0110 #define GICR_PIDR2 GICD_PIDR2 +#define GICR_CTLR_ENABLE_LPIS (1UL << 0) + +#define GICR_TYPER_CPU_NUMBER(r) (((r) >> 8) & 0xffff) + #define GICR_WAKER_ProcessorSleep (1U << 1) #define GICR_WAKER_ChildrenAsleep (1U << 2) +#define GICR_PROPBASER_NonShareable (0U << 10) +#define GICR_PROPBASER_InnerShareable (1U << 10) +#define GICR_PROPBASER_OuterShareable (2U << 10) +#define GICR_PROPBASER_SHAREABILITY_MASK (3UL << 10) +#define GICR_PROPBASER_nCnB (0U << 7) +#define GICR_PROPBASER_nC (1U << 7) +#define GICR_PROPBASER_RaWt (2U << 7) +#define GICR_PROPBASER_RaWb (3U << 7) +#define GICR_PROPBASER_WaWt (4U << 7) +#define GICR_PROPBASER_WaWb (5U << 7) +#define GICR_PROPBASER_RaWaWt (6U << 7) +#define GICR_PROPBASER_RaWaWb (7U << 7) +#define GICR_PROPBASER_IDBITS_MASK (0x1f) + /* * Re-Distributor registers, offsets from SGI_base */ @@ -95,9 +113,93 @@ #define GICR_IPRIORITYR0 GICD_IPRIORITYR #define GICR_ICFGR0 GICD_ICFGR +#define GICR_TYPER_PLPIS (1U << 0) #define GICR_TYPER_VLPIS (1U << 1) #define GICR_TYPER_LAST (1U << 4) +#define LPI_PROP_GROUP1 (1 << 1) +#define LPI_PROP_ENABLED (1 << 0) + +/* + * ITS registers, offsets from ITS_base + */ +#define GITS_CTLR 0x0000 +#define GITS_IIDR 0x0004 +#define GITS_TYPER 0x0008 +#define GITS_CBASER 0x0080 +#define GITS_CWRITER 0x0088 +#define GITS_CREADR 0x0090 +#define GITS_BASER 0x0100 +#define GITS_PIDR2 GICR_PIDR2 + +#define GITS_TRANSLATER 0x10040 + +#define GITS_TYPER_PTA (1UL << 19) + +#define GITS_CBASER_VALID (1UL << 63) +#define GITS_CBASER_nCnB (0UL << 59) +#define GITS_CBASER_nC (1UL << 59) +#define GITS_CBASER_RaWt (2UL << 59) +#define GITS_CBASER_RaWb (3UL << 59) +#define GITS_CBASER_WaWt (4UL << 59) +#define GITS_CBASER_WaWb (5UL << 59) +#define GITS_CBASER_RaWaWt (6UL << 59) +#define GITS_CBASER_RaWaWb (7UL << 59) +#define GITS_CBASER_NonShareable (0UL << 10) +#define GITS_CBASER_InnerShareable (1UL << 10) +#define GITS_CBASER_OuterShareable (2UL << 10) +#define GITS_CBASER_SHAREABILITY_MASK (3UL << 10) + +#define GITS_BASER_NR_REGS 8 + +#define GITS_BASER_VALID (1UL << 63) +#define GITS_BASER_nCnB (0UL << 59) +#define GITS_BASER_nC (1UL << 59) +#define GITS_BASER_RaWt (2UL << 59) +#define GITS_BASER_RaWb (3UL << 59) +#define GITS_BASER_WaWt (4UL << 59) +#define GITS_BASER_WaWb (5UL << 59) +#define GITS_BASER_RaWaWt (6UL << 59) +#define GITS_BASER_RaWaWb (7UL << 59) +#define GITS_BASER_TYPE_SHIFT (56) +#define GITS_BASER_TYPE(r) (((r) >> GITS_BASER_TYPE_SHIFT) & 7) +#define GITS_BASER_ENTRY_SIZE_SHIFT (48) +#define GITS_BASER_ENTRY_SIZE(r) ((((r) >> GITS_BASER_ENTRY_SIZE_SHIFT) & 0xff) + 1) +#define GITS_BASER_NonShareable (0UL << 10) +#define GITS_BASER_InnerShareable (1UL << 10) +#define GITS_BASER_OuterShareable (2UL << 10) +#define GITS_BASER_SHAREABILITY_SHIFT (10) +#define GITS_BASER_SHAREABILITY_MASK (3UL << GITS_BASER_SHAREABILITY_SHIFT) +#define GITS_BASER_PAGE_SIZE_SHIFT (8) +#define GITS_BASER_PAGE_SIZE_4K (0UL << GITS_BASER_PAGE_SIZE_SHIFT) +#define GITS_BASER_PAGE_SIZE_16K (1UL << GITS_BASER_PAGE_SIZE_SHIFT) +#define GITS_BASER_PAGE_SIZE_64K (2UL << GITS_BASER_PAGE_SIZE_SHIFT) +#define GITS_BASER_PAGE_SIZE_MASK (3UL << GITS_BASER_PAGE_SIZE_SHIFT) + +#define GITS_BASER_TYPE_NONE 0 +#define GITS_BASER_TYPE_DEVICE 1 +#define GITS_BASER_TYPE_VCPU 2 +#define GITS_BASER_TYPE_CPU 3 +#define GITS_BASER_TYPE_COLLECTION 4 +#define GITS_BASER_TYPE_RESERVED5 5 +#define GITS_BASER_TYPE_RESERVED6 6 +#define GITS_BASER_TYPE_RESERVED7 7 + +/* + * ITS commands + */ +#define GITS_CMD_MAPD 0x08 +#define GITS_CMD_MAPC 0x09 +#define GITS_CMD_MAPVI 0x0a +#define GITS_CMD_MOVI 0x01 +#define GITS_CMD_DISCARD 0x0f +#define GITS_CMD_INV 0x0c +#define GITS_CMD_MOVALL 0x0e +#define GITS_CMD_INVALL 0x0d +#define GITS_CMD_INT 0x03 +#define GITS_CMD_CLEAR 0x04 +#define GITS_CMD_SYNC 0x05 + /* * CPU interface registers */ -- cgit v1.2.3 From b48ac83d6bbc20a973c3e8133fd1ebda873d026a Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Mon, 24 Nov 2014 14:35:16 +0000 Subject: irqchip: GICv3: ITS: MSI support Now, the bit of code that allow us to use the ITS as a MSI controller. Both MSI and MSI-X are supported. Signed-off-by: Marc Zyngier Link: https://lkml.kernel.org/r/1416839720-18400-10-git-send-email-marc.zyngier@arm.com Signed-off-by: Jason Cooper --- include/linux/irqchip/arm-gic-v3.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'include/linux') diff --git a/include/linux/irqchip/arm-gic-v3.h b/include/linux/irqchip/arm-gic-v3.h index 21c9d70426d1..0ed30d7d9338 100644 --- a/include/linux/irqchip/arm-gic-v3.h +++ b/include/linux/irqchip/arm-gic-v3.h @@ -295,6 +295,12 @@ #include +/* + * We need a value to serve as a irq-type for LPIs. Choose one that will + * hopefully pique the interest of the reviewer. + */ +#define GIC_IRQ_TYPE_LPI 0xa110c8ed + struct rdists { struct { void __iomem *rd_base; -- cgit v1.2.3 From da33f31de3e1eebb198109c1cccdc3a094e369c4 Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Mon, 24 Nov 2014 14:35:18 +0000 Subject: irqchip: GICv3: ITS: plug ITS init into main GICv3 code As the ITS is always a subsystem if GICv3, its probing/init is driven by the main GICv3 code. Plug that code in (guarded by a config option). Signed-off-by: Marc Zyngier Link: https://lkml.kernel.org/r/1416839720-18400-12-git-send-email-marc.zyngier@arm.com Signed-off-by: Jason Cooper --- include/linux/irqchip/arm-gic-v3.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include/linux') diff --git a/include/linux/irqchip/arm-gic-v3.h b/include/linux/irqchip/arm-gic-v3.h index 0ed30d7d9338..1e8b0cf30792 100644 --- a/include/linux/irqchip/arm-gic-v3.h +++ b/include/linux/irqchip/arm-gic-v3.h @@ -318,6 +318,11 @@ static inline void gic_write_eoir(u64 irq) isb(); } +struct irq_domain; +int its_cpu_init(void); +int its_init(struct device_node *node, struct rdists *rdists, + struct irq_domain *domain); + #endif #endif -- cgit v1.2.3 From 853a33ce6932601030f550653aea91a0e0a71511 Mon Sep 17 00:00:00 2001 From: Suravee Suthikulpanit Date: Tue, 25 Nov 2014 18:47:22 +0000 Subject: irqchip: gic-v2m: Add support for ARM GICv2m MSI(-X) doorbell ARM GICv2m specification extends GICv2 to support MSI(-X) with a new register frame. This allows a GICv2 based system to support MSI with minimal changes. Signed-off-by: Suravee Suthikulpanit [maz: converted the driver to use stacked irq domains, updated changelog] Signed-off-by: Marc Zyngier Link: https://lkml.kernel.org/r/1416941243-7181-2-git-send-email-marc.zyngier@arm.com Signed-off-by: Jason Cooper --- include/linux/irqchip/arm-gic.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/linux') diff --git a/include/linux/irqchip/arm-gic.h b/include/linux/irqchip/arm-gic.h index 13eed92c7d24..60b09ed58cae 100644 --- a/include/linux/irqchip/arm-gic.h +++ b/include/linux/irqchip/arm-gic.h @@ -106,6 +106,8 @@ static inline void gic_init(unsigned int nr, int start, gic_init_bases(nr, start, dist, cpu, 0, NULL); } +int gicv2m_of_init(struct device_node *node, struct irq_domain *parent); + void gic_send_sgi(unsigned int cpu_id, unsigned int irq); int gic_get_cpu_id(unsigned int cpu); void gic_migrate_target(unsigned int new_cpu_id); -- cgit v1.2.3 From 947c88592f17bd299ff677049c3cda36cc6f93dd Mon Sep 17 00:00:00 2001 From: Peter Chen Date: Wed, 26 Nov 2014 13:44:31 +0800 Subject: usb: chipidea: remove flag CI_HDRC_REQUIRE_TRANSCEIVER Now, USB PHY is mandatory for chipidea core, the flag CI_HDRC_REQUIRE_TRANSCEIVER is useless. Signed-off-by: Peter Chen Signed-off-by: Greg Kroah-Hartman --- include/linux/usb/chipidea.h | 1 - 1 file changed, 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/usb/chipidea.h b/include/linux/usb/chipidea.h index c01bf4ea27b9..535997a6681b 100644 --- a/include/linux/usb/chipidea.h +++ b/include/linux/usb/chipidea.h @@ -19,7 +19,6 @@ struct ci_hdrc_platform_data { enum usb_phy_interface phy_mode; unsigned long flags; #define CI_HDRC_REGS_SHARED BIT(0) -#define CI_HDRC_REQUIRE_TRANSCEIVER BIT(1) #define CI_HDRC_DISABLE_STREAMING BIT(3) /* * Only set it when DCCPARAMS.DC==1 and DCCPARAMS.HC==1, -- cgit v1.2.3 From e5262d0568dc9e10de79a726dfd7edb712a2c10b Mon Sep 17 00:00:00 2001 From: Weike Chen Date: Wed, 26 Nov 2014 02:35:10 -0800 Subject: spi: spi-pxa2xx: SPI support for Intel Quark X1000 There are two SPI controllers exported by PCI subsystem for Intel Quark X1000. The SPI memory mapped I/O registers supported by Quark are different from the current implementation, and Quark only supports the registers of 'SSCR0', 'SSCR1', 'SSSR', 'SSDR', and 'DDS_RATE'. This patch is to enable the SPI for Intel Quark X1000. This piece of work is derived from Dan O'Donovan's initial work for Intel Quark X1000 SPI enabling. Reviewed-by: Andy Shevchenko Acked-by: Mika Westerberg Signed-off-by: Weike Chen Signed-off-by: Mark Brown --- include/linux/pxa2xx_ssp.h | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'include/linux') diff --git a/include/linux/pxa2xx_ssp.h b/include/linux/pxa2xx_ssp.h index f2b405116166..77aed9ea1d26 100644 --- a/include/linux/pxa2xx_ssp.h +++ b/include/linux/pxa2xx_ssp.h @@ -108,6 +108,25 @@ #define SSCR1_RxTresh(x) (((x) - 1) << 10) /* level [1..4] */ #endif +/* QUARK_X1000 SSCR0 bit definition */ +#define QUARK_X1000_SSCR0_DSS (0x1F) /* Data Size Select (mask) */ +#define QUARK_X1000_SSCR0_DataSize(x) ((x) - 1) /* Data Size Select [4..32] */ +#define QUARK_X1000_SSCR0_FRF (0x3 << 5) /* FRame Format (mask) */ +#define QUARK_X1000_SSCR0_Motorola (0x0 << 5) /* Motorola's Serial Peripheral Interface (SPI) */ + +#define RX_THRESH_QUARK_X1000_DFLT 1 +#define TX_THRESH_QUARK_X1000_DFLT 16 + +#define QUARK_X1000_SSSR_TFL_MASK (0x1F << 8) /* Transmit FIFO Level mask */ +#define QUARK_X1000_SSSR_RFL_MASK (0x1F << 13) /* Receive FIFO Level mask */ + +#define QUARK_X1000_SSCR1_TFT (0x1F << 6) /* Transmit FIFO Threshold (mask) */ +#define QUARK_X1000_SSCR1_TxTresh(x) (((x) - 1) << 6) /* level [1..32] */ +#define QUARK_X1000_SSCR1_RFT (0x1F << 11) /* Receive FIFO Threshold (mask) */ +#define QUARK_X1000_SSCR1_RxTresh(x) (((x) - 1) << 11) /* level [1..32] */ +#define QUARK_X1000_SSCR1_STRF (1 << 17) /* Select FIFO or EFWR */ +#define QUARK_X1000_SSCR1_EFWR (1 << 16) /* Enable FIFO Write/Read */ + /* extra bits in PXA255, PXA26x and PXA27x SSP ports */ #define SSCR0_TISSP (1 << 4) /* TI Sync Serial Protocol */ #define SSCR0_PSP (3 << 4) /* PSP - Programmable Serial Protocol */ @@ -175,6 +194,7 @@ enum pxa_ssp_type { PXA910_SSP, CE4100_SSP, LPSS_SSP, + QUARK_X1000_SSP, }; struct ssp_device { -- cgit v1.2.3 From 2378ad1228d2cdae0ea5448beb4fb2b42ebaf99c Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Wed, 17 Sep 2014 02:07:52 +0300 Subject: drm: rcar-du: Remove platform data support All platforms now instantiate the DU through DT, platform data support isn't needed anymore. Signed-off-by: Laurent Pinchart --- include/linux/platform_data/rcar-du.h | 74 ----------------------------------- 1 file changed, 74 deletions(-) delete mode 100644 include/linux/platform_data/rcar-du.h (limited to 'include/linux') diff --git a/include/linux/platform_data/rcar-du.h b/include/linux/platform_data/rcar-du.h deleted file mode 100644 index a5f045e1d8fe..000000000000 --- a/include/linux/platform_data/rcar-du.h +++ /dev/null @@ -1,74 +0,0 @@ -/* - * rcar_du.h -- R-Car Display Unit DRM driver - * - * Copyright (C) 2013 Renesas Corporation - * - * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com) - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - */ - -#ifndef __RCAR_DU_H__ -#define __RCAR_DU_H__ - -#include