diff options
175 files changed, 5051 insertions, 3490 deletions
diff --git a/Documentation/ABI/testing/sysfs-driver-xen-blkback b/Documentation/ABI/testing/sysfs-driver-xen-blkback new file mode 100644 index 000000000000..8bb43b66eb55 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-driver-xen-blkback @@ -0,0 +1,17 @@ +What: /sys/module/xen_blkback/parameters/max_buffer_pages +Date: March 2013 +KernelVersion: 3.11 +Contact: Roger Pau Monné <roger.pau@citrix.com> +Description: + Maximum number of free pages to keep in each block + backend buffer. + +What: /sys/module/xen_blkback/parameters/max_persistent_grants +Date: March 2013 +KernelVersion: 3.11 +Contact: Roger Pau Monné <roger.pau@citrix.com> +Description: + Maximum number of grants to map persistently in + blkback. If the frontend tries to use more than + max_persistent_grants, the LRU kicks in and starts + removing 5% of max_persistent_grants every 100ms. diff --git a/Documentation/ABI/testing/sysfs-driver-xen-blkfront b/Documentation/ABI/testing/sysfs-driver-xen-blkfront new file mode 100644 index 000000000000..c0a6cb7eb314 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-driver-xen-blkfront @@ -0,0 +1,10 @@ +What: /sys/module/xen_blkfront/parameters/max +Date: June 2013 +KernelVersion: 3.11 +Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> +Description: + Maximum number of segments that the frontend will negotiate + with the backend for indirect descriptors. The default value + is 32 - higher value means more potential throughput but more + memory usage. The backend picks the minimum of the frontend + and its default backend value. diff --git a/Documentation/bcache.txt b/Documentation/bcache.txt index c3365f26b2d9..32b6c3189d98 100644 --- a/Documentation/bcache.txt +++ b/Documentation/bcache.txt @@ -46,29 +46,33 @@ you format your backing devices and cache device at the same time, you won't have to manually attach: make-bcache -B /dev/sda /dev/sdb -C /dev/sdc -To make bcache devices known to the kernel, echo them to /sys/fs/bcache/register: +bcache-tools now ships udev rules, and bcache devices are known to the kernel +immediately. Without udev, you can manually register devices like this: echo /dev/sdb > /sys/fs/bcache/register echo /dev/sdc > /sys/fs/bcache/register -To register your bcache devices automatically, you could add something like -this to an init script: +Registering the backing device makes the bcache device show up in /dev; you can +now format it and use it as normal. But the first time using a new bcache +device, it'll be running in passthrough mode until you attach it to a cache. +See the section on attaching. - echo /dev/sd* > /sys/fs/bcache/register_quiet +The devices show up as: -It'll look for bcache superblocks and ignore everything that doesn't have one. + /dev/bcache<N> -Registering the backing device makes the bcache show up in /dev; you can now -format it and use it as normal. But the first time using a new bcache device, -it'll be running in passthrough mode until you attach it to a cache. See the -section on attaching. +As well as (with udev): -The devices show up at /dev/bcacheN, and can be controlled via sysfs from -/sys/block/bcacheN/bcache: + /dev/bcache/by-uuid/<uuid> + /dev/bcache/by-label/<label> + +To get started: mkfs.ext4 /dev/bcache0 mount /dev/bcache0 /mnt +You can control bcache devices through sysfs at /sys/block/bcache<N>/bcache . + Cache devices are managed as sets; multiple caches per set isn't supported yet but will allow for mirroring of metadata and dirty data in the future. Your new cache set shows up as /sys/fs/bcache/<UUID> @@ -80,11 +84,11 @@ must be attached to your cache set to enable caching. Attaching a backing device to a cache set is done thusly, with the UUID of the cache set in /sys/fs/bcache: - echo <UUID> > /sys/block/bcache0/bcache/attach + echo <CSET-UUID> > /sys/block/bcache0/bcache/attach This only has to be done once. The next time you reboot, just reregister all your bcache devices. If a backing device has data in a cache somewhere, the -/dev/bcache# device won't be created until the cache shows up - particularly +/dev/bcache<N> device won't be created until the cache shows up - particularly important if you have writeback caching turned on. If you're booting up and your cache device is gone and never coming back, you @@ -191,6 +195,9 @@ want for getting the best possible numbers when benchmarking. SYSFS - BACKING DEVICE: +Available at /sys/block/<bdev>/bcache, /sys/block/bcache*/bcache and +(if attached) /sys/fs/bcache/<cset-uuid>/bdev* + attach Echo the UUID of a cache set to this file to enable caching. @@ -300,6 +307,8 @@ cache_readaheads SYSFS - CACHE SET: +Available at /sys/fs/bcache/<cset-uuid> + average_key_size Average data per key in the btree. @@ -390,6 +399,8 @@ trigger_gc SYSFS - CACHE DEVICE: +Available at /sys/block/<cdev>/bcache + block_size Minimum granularity of writes - should match hardware sector size. diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt index d5a79caec147..366ce9b87240 100644 --- a/Documentation/devicetree/bindings/vendor-prefixes.txt +++ b/Documentation/devicetree/bindings/vendor-prefixes.txt @@ -26,6 +26,7 @@ est ESTeem Wireless Modems fsl Freescale Semiconductor GEFanuc GE Fanuc Intelligent Platforms Embedded Systems, Inc. gef GE Fanuc Intelligent Platforms Embedded Systems, Inc. +hisilicon Hisilicon Limited. hp Hewlett Packard ibm International Business Machines (IBM) idt Integrated Device Technologies, Inc. @@ -43,6 +44,7 @@ nxp NXP Semiconductors onnn ON Semiconductor Corp. picochip Picochip Ltd powervr PowerVR (deprecated, use img) +qca Qualcomm Atheros, Inc. qcom Qualcomm, Inc. ralink Mediatek/Ralink Technology Corp. ramtron Ramtron International diff --git a/MAINTAINERS b/MAINTAINERS index bf61e04291ab..f817ae196a8e 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1642,7 +1642,7 @@ S: Maintained F: drivers/net/hamradio/baycom* BCACHE (BLOCK LAYER CACHE) -M: Kent Overstreet <koverstreet@google.com> +M: Kent Overstreet <kmo@daterainc.com> L: linux-bcache@vger.kernel.org W: http://bcache.evilpiepirate.org S: Maintained: @@ -3346,7 +3346,7 @@ F: Documentation/firmware_class/ F: drivers/base/firmware*.c F: include/linux/firmware.h -FLASHSYSTEM DRIVER (IBM FlashSystem 70/80 PCI SSD Flash Card) +FLASH ADAPTER DRIVER (IBM Flash Adapter 900GB Full Height PCI Flash Card) M: Joshua Morris <josh.h.morris@us.ibm.com> M: Philip Kelleher <pjk1939@linux.vnet.ibm.com> S: Maintained @@ -3622,11 +3622,9 @@ F: drivers/isdn/gigaset/ F: include/uapi/linux/gigaset_dev.h GPIO SUBSYSTEM -M: Grant Likely <grant.likely@linaro.org> M: Linus Walleij <linus.walleij@linaro.org> S: Maintained L: linux-gpio@vger.kernel.org -T: git git://git.secretlab.ca/git/linux-2.6.git F: Documentation/gpio.txt F: drivers/gpio/ F: include/linux/gpio* @@ -4472,8 +4470,6 @@ F: drivers/irqchip/ IRQ DOMAINS (IRQ NUMBER MAPPING LIBRARY) M: Benjamin Herrenschmidt <benh@kernel.crashing.org> -M: Grant Likely <grant.likely@linaro.org> -T: git git://git.secretlab.ca/git/linux-2.6.git irqdomain/next S: Maintained F: Documentation/IRQ-domain.txt F: include/linux/irqdomain.h @@ -4990,7 +4986,7 @@ F: arch/powerpc/platforms/44x/ LINUX FOR POWERPC EMBEDDED XILINX VIRTEX L: linuxppc-dev@lists.ozlabs.org -S: Unmaintained +S: Orphan F: arch/powerpc/*/*virtex* F: arch/powerpc/*/*/*virtex* @@ -5886,7 +5882,7 @@ OMAP DEVICE TREE SUPPORT M: Benoît Cousson <b-cousson@ti.com> M: Tony Lindgren <tony@atomide.com> L: linux-omap@vger.kernel.org -L: devicetree-discuss@lists.ozlabs.org (moderated for non-subscribers) +L: devicetree@vger.kernel.org S: Maintained F: arch/arm/boot/dts/*omap* F: arch/arm/boot/dts/*am3* @@ -6050,17 +6046,28 @@ F: drivers/i2c/busses/i2c-ocores.c OPEN FIRMWARE AND FLATTENED DEVICE TREE M: Grant Likely <grant.likely@linaro.org> M: Rob Herring <rob.herring@calxeda.com> -L: devicetree-discuss@lists.ozlabs.org (moderated for non-subscribers) +L: devicetree@vger.kernel.org W: http://fdt.secretlab.ca T: git git://git.secretlab.ca/git/linux-2.6.git S: Maintained -F: Documentation/devicetree -F: drivers/of +F: drivers/of/ F: include/linux/of*.h -F: scripts/dtc +F: scripts/dtc/ K: of_get_property K: of_match_table +OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS +M: Rob Herring <rob.herring@calxeda.com> +M: Pawel Moll <pawel.moll@arm.com> +M: Mark Rutland <mark.rutland@arm.com> +M: Stephen Warren <swarren@wwwdotorg.org> +M: Ian Campbell <ian.campbell@citrix.com> +L: devicetree@vger.kernel.org +S: Maintained +F: Documentation/devicetree/ +F: arch/*/boot/dts/ +F: include/dt-bindings/ + OPENRISC ARCHITECTURE M: Jonas Bonn <jonas@southpole.se> W: http://openrisc.net @@ -7746,7 +7753,6 @@ F: drivers/clk/spear/ SPI SUBSYSTEM M: Mark Brown <broonie@kernel.org> -M: Grant Likely <grant.likely@linaro.org> L: linux-spi@vger.kernel.org T: git git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git Q: http://patchwork.kernel.org/project/spi-devel-general/list/ @@ -9288,7 +9294,7 @@ S: Maintained F: drivers/net/ethernet/xilinx/xilinx_axienet* XILINX SYSTEMACE DRIVER -S: Unmaintained +S: Orphan F: drivers/block/xsysace.c XILINX UARTLITE SERIAL DRIVER diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig index 837a1f2d8b96..082d9b4b5472 100644 --- a/arch/alpha/Kconfig +++ b/arch/alpha/Kconfig @@ -15,6 +15,7 @@ config ALPHA select ARCH_WANT_OPTIONAL_GPIOLIB select ARCH_WANT_IPC_PARSE_VERSION select ARCH_HAVE_NMI_SAFE_CMPXCHG + select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE select GENERIC_SMP_IDLE_THREAD select GENERIC_CMOS_UPDATE select GENERIC_STRNCPY_FROM_USER diff --git a/arch/alpha/include/asm/atomic.h b/arch/alpha/include/asm/atomic.h index c2cbe4fc391c..78b03ef39f6f 100644 --- a/arch/alpha/include/asm/atomic.h +++ b/arch/alpha/include/asm/atomic.h @@ -186,17 +186,24 @@ static __inline__ long atomic64_sub_return(long i, atomic64_t * v) */ static __inline__ int __atomic_add_unless(atomic_t *v, int a, int u) { - int c, old; - c = atomic_read(v); - for (;;) { - if (unlikely(c == (u))) - break; - old = atomic_cmpxchg((v), c, c + (a)); - if (likely(old == c)) - break; - c = old; - } - return c; + int c, new, old; + smp_mb(); + __asm__ __volatile__( + "1: ldl_l %[old],%[mem]\n" + " cmpeq %[old],%[u],%[c]\n" + " addl %[old],%[a],%[new]\n" + " bne %[c],2f\n" + " stl_c %[new],%[mem]\n" + " beq %[new],3f\n" + "2:\n" + ".subsection 2\n" + "3: br 1b\n" + ".previous" + : [old] "=&r"(old), [new] "=&r"(new), [c] "=&r"(c) + : [mem] "m"(*v), [a] "rI"(a), [u] "rI"((long)u) + : "memory"); + smp_mb(); + return old; } @@ -207,21 +214,56 @@ static __inline__ int __atomic_add_unless(atomic_t *v, int a, int u) * @u: ...unless v is equal to u. * * Atomically adds @a to @v, so long as it was not @u. - * Returns the old value of @v. + * Returns true iff @v was not @u. */ static __inline__ int atomic64_add_unless(atomic64_t *v, long a, long u) { - long c, old; - c = atomic64_read(v); - for (;;) { - if (unlikely(c == (u))) - break; - old = atomic64_cmpxchg((v), c, c + (a)); - if (likely(old == c)) - break; - c = old; - } - return c != (u); + long c, tmp; + smp_mb(); + __asm__ __volatile__( + "1: ldq_l %[tmp],%[mem]\n" + " cmpeq %[tmp],%[u],%[c]\n" + " addq %[tmp],%[a],%[tmp]\n" + " bne %[c],2f\n" + " stq_c %[tmp],%[mem]\n" + " beq %[tmp],3f\n" + "2:\n" + ".subsection 2\n" + "3: br 1b\n" + ".previous" + : [tmp] "=&r"(tmp), [c] "=&r"(c) + : [mem] "m"(*v), [a] "rI"(a), [u] "rI"(u) + : "memory"); + smp_mb(); + return !c; +} + +/* + * atomic64_dec_if_positive - decrement by 1 if old value positive + * @v: pointer of type atomic_t + * + * The function returns the old value of *v minus 1, even if + * the atomic variable, v, was not decremented. + */ +static inline long atomic64_dec_if_positive(atomic64_t *v) +{ + long old, tmp; + smp_mb(); + __asm__ __volatile__( + "1: ldq_l %[old],%[mem]\n" + " subq %[old],1,%[tmp]\n" + " ble %[old],2f\n" + " stq_c %[tmp],%[mem]\n" + " beq %[tmp],3f\n" + "2:\n" + ".subsection 2\n" + "3: br 1b\n" + ".previous" + : [old] "=&r"(old), [tmp] "=&r"(tmp) + : [mem] "m"(*v) + : "memory"); + smp_mb(); + return old - 1; } #define atomic64_inc_not_zero(v) atomic64_add_unless((v), 1, 0) diff --git a/arch/alpha/include/asm/param.h b/arch/alpha/include/asm/param.h index bf46af51941b..a5b68b268bcf 100644 --- a/arch/alpha/include/asm/param.h +++ b/arch/alpha/include/asm/param.h @@ -3,7 +3,9 @@ #include <uapi/asm/param.h> -#define HZ CONFIG_HZ -#define USER_HZ HZ -# define CLOCKS_PER_SEC HZ /* frequency at which times() counts */ +# undef HZ +# define HZ CONFIG_HZ +# define USER_HZ 1024 +# define CLOCKS_PER_SEC USER_HZ /* frequency at which times() counts */ + #endif /* _ASM_ALPHA_PARAM_H */ diff --git a/arch/alpha/include/asm/spinlock.h b/arch/alpha/include/asm/spinlock.h index 3bba21e41b81..37b570d01202 100644 --- a/arch/alpha/include/asm/spinlock.h +++ b/arch/alpha/include/asm/spinlock.h @@ -168,8 +168,4 @@ static inline void arch_write_unlock(arch_rwlock_t * lock) #define arch_read_lock_flags(lock, flags) arch_read_lock(lock) #define arch_write_lock_flags(lock, flags) arch_write_lock(lock) -#define arch_spin_relax(lock) cpu_relax() -#define arch_read_relax(lock) cpu_relax() -#define arch_write_relax(lock) cpu_relax() - #endif /* _ALPHA_SPINLOCK_H */ diff --git a/arch/alpha/include/asm/unistd.h b/arch/alpha/include/asm/unistd.h index 43baee17acdf..f2c94402e2c8 100644 --- a/arch/alpha/include/asm/unistd.h +++ b/arch/alpha/include/asm/unistd.h @@ -3,8 +3,7 @@ #include <uapi/asm/unistd.h> - -#define NR_SYSCALLS 506 +#define NR_SYSCALLS 508 #define __ARCH_WANT_OLD_READDIR #define __ARCH_WANT_STAT64 diff --git a/arch/alpha/include/uapi/asm/param.h b/arch/alpha/include/uapi/asm/param.h index 29daed819ebd..dbcd9834af6d 100644 --- a/arch/alpha/include/uapi/asm/param.h +++ b/arch/alpha/include/uapi/asm/param.h @@ -1,13 +1,7 @@ #ifndef _UAPI_ASM_ALPHA_PARAM_H #define _UAPI_ASM_ALPHA_PARAM_H -/* ??? Gross. I don't want to parameterize this, and supposedly the - hardware ignores reprogramming. We also need userland buy-in to the - change in HZ, since this is visible in the wait4 resources etc. */ - -#ifndef __KERNEL__ #define HZ 1024 -#endif #define EXEC_PAGESIZE 8192 @@ -17,5 +11,4 @@ #define MAXHOSTNAMELEN 64 /* max length of hostname */ - #endif /* _UAPI_ASM_ALPHA_PARAM_H */ diff --git a/arch/alpha/include/uapi/asm/unistd.h b/arch/alpha/include/uapi/asm/unistd.h index 801d28bcea51..53ae7bb1bfd1 100644 --- a/arch/alpha/include/uapi/asm/unistd.h +++ b/arch/alpha/include/uapi/asm/unistd.h @@ -467,5 +467,7 @@ #define __NR_sendmmsg 503 #define __NR_process_vm_readv 504 #define __NR_process_vm_writev 505 +#define __NR_kcmp 506 +#define __NR_finit_module 507 #endif /* _UAPI_ALPHA_UNISTD_H */ diff --git a/arch/alpha/kernel/entry.S b/arch/alpha/kernel/entry.S index f62a994ef126..a969b95ee5ac 100644 --- a/arch/alpha/kernel/entry.S +++ b/arch/alpha/kernel/entry.S @@ -12,11 +12,32 @@ .text .set noat + .cfi_sections .debug_frame /* Stack offsets. */ #define SP_OFF 184 #define SWITCH_STACK_SIZE 320 +.macro CFI_START_OSF_FRAME func + .align 4 + .globl \func + .type \func,@function +\func: + .cfi_startproc simple + .cfi_return_column 64 + .cfi_def_cfa $sp, 48 + .cfi_rel_offset 64, 8 + .cfi_rel_offset $gp, 16 + .cfi_rel_offset $16, 24 + .cfi_rel_offset $17, 32 + .cfi_rel_offset $18, 40 +.endm + +.macro CFI_END_OSF_FRAME func + .cfi_endproc + .size \func, . - \func +.endm + /* * This defines the normal kernel pt-regs layout. * @@ -27,100 +48,158 @@ * the palcode-provided values are available to the signal handler. */ -#define SAVE_ALL \ - subq $sp, SP_OFF, $sp; \ - stq $0, 0($sp); \ - stq $1, 8($sp); \ - stq $2, 16($sp); \ - stq $3, 24($sp); \ - stq $4, 32($sp); \ - stq $28, 144($sp); \ - lda $2, alpha_mv; \ - stq $5, 40($sp); \ - stq $6, 48($sp); \ - stq $7, 56($sp); \ - stq $8, 64($sp); \ - stq $19, 72($sp); \ - stq $20, 80($sp); \ - stq $21, 88($sp); \ - ldq $2, HAE_CACHE($2); \ - stq $22, 96($sp); \ - stq $23, 104($sp); \ - stq $24, 112($sp); \ - stq $25, 120($sp); \ - stq $26, 128($sp); \ - stq $27, 136($sp); \ - stq $2, 152($sp); \ - stq $16, 160($sp); \ - stq $17, 168($sp); \ +.macro SAVE_ALL + subq $sp, SP_OFF, $sp + .cfi_adjust_cfa_offset SP_OFF + stq $0, 0($sp) + stq $1, 8($sp) + stq $2, 16($sp) + stq $3, 24($sp) + stq $4, 32($sp) + stq $28, 144($sp) + .cfi_rel_offset $0, 0 + .cfi_rel_offset $1, 8 + .cfi_rel_offset $2, 16 + .cfi_rel_offset $3, 24 + .cfi_rel_offset $4, 32 + .cfi_rel_offset $28, 144 + lda $2, alpha_mv + stq $5, 40($sp) + stq $6, 48($sp) + stq $7, 56($sp) + stq $8, 64($sp) + stq $19, 72($sp) + stq $20, 80($sp) + stq $21, 88($sp) + ldq $2, HAE_CACHE($2) + stq $22, 96($sp) + stq $23, 104($sp) + stq $24, 112($sp) + stq $25, 120($sp) + stq $26, 128($sp) + stq $27, 136($sp) + stq $2, 152($sp) + stq $16, 160($sp) + stq $17, 168($sp) stq $18, 176($sp) + .cfi_rel_offset $5, 40 + .cfi_rel_offset $6, 48 + .cfi_rel_offset $7, 56 + .cfi_rel_offset $8, 64 + .cfi_rel_offset $19, 72 + .cfi_rel_offset $20, 80 + .cfi_rel_offset $21, 88 + .cfi_rel_offset $22, 96 + .cfi_rel_offset $23, 104 + .cfi_rel_offset $24, 112 + .cfi_rel_offset $25, 120 + .cfi_rel_offset $26, 128 + .cfi_rel_offset $27, 136 +.endm -#define RESTORE_ALL \ - lda $19, alpha_mv; \ - ldq $0, 0($sp); \ - ldq $1, 8($sp); \ - ldq $2, 16($sp); \ - ldq $3, 24($sp); \ - ldq $21, 152($sp); \ - ldq $20, HAE_CACHE($19); \ - ldq $4, 32($sp); \ - ldq $5, 40($sp); \ - ldq $6, 48($sp); \ - ldq $7, 56($sp); \ - subq $20, $21, $20; \ - ldq $8, 64($sp); \ - beq $20, 99f; \ - ldq $20, HAE_REG($19); \ - stq $21, HAE_CACHE($19); \ - stq $21, 0($20); \ -99:; \ - ldq $19, 72($sp); \ - ldq $20, 80($sp); \ - ldq $21, 88($sp); \ - ldq $22, 96($sp); \ - ldq $23, 104($sp); \ - ldq $24, 112($sp); \ - ldq $25, 120($sp); \ - ldq $26, 128($sp); \ - ldq $27, 136($sp); \ - ldq $28, 144($sp); \ +.macro RESTORE_ALL + lda $19, alpha_mv + ldq $0, 0($sp) + ldq $1, 8($sp) + ldq $2, 16($sp) + ldq $3, 24($sp) + ldq $21, 152($sp) + ldq $20, HAE_CACHE($19) + ldq $4, 32($sp) + ldq $5, 40($sp) + ldq $6, 48($sp) + ldq $7, 56($sp) + subq $20, $21, $20 + ldq $8, 64($sp) + beq $20, 99f + ldq $20, HAE_REG($19) + stq $21, HAE_CACHE($19) + stq $21, 0($20) +99: ldq $19, 72($sp) + ldq $20, 80($sp) + ldq $21, 88($sp) + ldq $22, 96($sp) + ldq $23, 104($sp) + ldq $24, 112($sp) + ldq $25, 120($sp) + ldq $26, 128($sp) + ldq $27, 136($sp) + ldq $28, 144($sp) addq $sp, SP_OFF, $sp + .cfi_restore $0 + .cfi_restore $1 + .cfi_restore $2 + .cfi_restore $3 + .cfi_restore $4 + .cfi_restore $5 + .cfi_restore $6 + .cfi_restore $7 + .cfi_restore $8 + .cfi_restore $19 + .cfi_restore $20 + .cfi_restore $21 + .cfi_restore $22 + .cfi_restore $23 + .cfi_restore $24 + .cfi_restore $25 + .cfi_restore $26 + .cfi_restore $27 + .cfi_restore $28 + .cfi_adjust_cfa_offset -SP_OFF +.endm + +.macro DO_SWITCH_STACK + bsr $1, do_switch_stack + .cfi_adjust_cfa_offset SWITCH_STACK_SIZE + .cfi_rel_offset $9, 0 + .cfi_rel_offset $10, 8 + .cfi_rel_offset $11, 16 + .cfi_rel_offset $12, 24 + .cfi_rel_offset $13, 32 + .cfi_rel_offset $14, 40 + .cfi_rel_offset $15, 48 + /* We don't really care about the FP registers for debugging. */ +.endm + +.macro UNDO_SWITCH_STACK + bsr $1, undo_switch_stack + .cfi_restore $9 + .cfi_restore $10 + .cfi_restore $11 + .cfi_restore $12 + .cfi_restore $13 + .cfi_restore $14 + .cfi_restore $15 + .cfi_adjust_cfa_offset -SWITCH_STACK_SIZE +.endm /* * Non-syscall kernel entry points. */ - .align 4 - .globl entInt - .ent entInt -entInt: +CFI_START_OSF_FRAME entInt SAVE_ALL lda $8, 0x3fff lda $26, ret_from_sys_call bic $sp, $8, $8 mov $sp, $19 jsr $31, do_entInt -.end entInt +CFI_END_OSF_FRAME entInt - .align 4 - .globl entArith - .ent entArith -entArith: +CFI_START_OSF_FRAME entArith SAVE_ALL lda $8, 0x3fff lda $26, ret_from_sys_call bic $sp, $8, $8 mov $sp, $18 jsr $31, do_entArith -.end entArith +CFI_END_OSF_FRAME entArith - .align 4 - .globl entMM - .ent entMM -entMM: +CFI_START_OSF_FRAME entMM SAVE_ALL /* save $9 - $15 so the inline exception code can manipulate them. */ subq $sp, 56, $sp + .cfi_adjust_cfa_offset 56 stq $9, 0($sp) stq $10, 8($sp) stq $11, 16($sp) @@ -128,6 +207,13 @@ entMM: stq $13, 32($sp) stq $14, 40($sp) stq $15, 48($sp) + .cfi_rel_offset $9, 0 + .cfi_rel_offset $10, 8 + .cfi_rel_offset $11, 16 + .cfi_rel_offset $12, 24 + .cfi_rel_offset $13, 32 + .cfi_rel_offset $14, 40 + .cfi_rel_offset $15, 48 addq $sp, 56, $19 /* handle the fault */ lda $8, 0x3fff @@ -142,28 +228,33 @@ entMM: ldq $14, 40($sp) ldq $15, 48($sp) addq $sp, 56, $sp + .cfi_restore $9 + .cfi_restore $10 + .cfi_restore $11 + .cfi_restore $12 + .cfi_restore $13 + .cfi_restore $14 + .cfi_restore $15 + .cfi_adjust_cfa_offset -56 /* finish up the syscall as normal. */ br ret_from_sys_call -.end entMM +CFI_END_OSF_FRAME entMM - .align 4 - .globl entIF - .ent entIF -entIF: +CFI_START_OSF_FRAME entIF SAVE_ALL lda $8, 0x3fff lda $26, ret_from_sys_call bic $sp, $8, $8 mov $sp, $17 jsr $31, do_entIF -.end entIF +CFI_END_OSF_FRAME entIF - .align 4 - .globl entUna - .ent entUna -entUna: +CFI_START_OSF_FRAME entUna lda $sp, -256($sp) + .cfi_adjust_cfa_offset 256 stq $0, 0($sp) + .cfi_rel_offset $0, 0 + .cfi_remember_state ldq $0, 256($sp) /* get PS */ stq $1, 8($sp) stq $2, 16($sp) @@ -195,6 +286,32 @@ entUna: stq $28, 224($sp) mov $sp, $19 stq $gp, 232($sp) + .cfi_rel_offset $1, 1*8 + .cfi_rel_offset $2, 2*8 + .cfi_rel_offset $3, 3*8 + .cfi_rel_offset $4, 4*8 + .cfi_rel_offset $5, 5*8 + .cfi_rel_offset $6, 6*8 + .cfi_rel_offset $7, 7*8 + .cfi_rel_offset $8, 8*8 + .cfi_rel_offset $9, 9*8 + .cfi_rel_offset $10, 10*8 + .cfi_rel_offset $11, 11*8 + .cfi_rel_offset $12, 12*8 + .cfi_rel_offset $13, 13*8 + .cfi_rel_offset $14, 14*8 + .cfi_rel_offset $15, 15*8 + .cfi_rel_offset $19, 19*8 + .cfi_rel_offset $20, 20*8 + .cfi_rel_offset $21, 21*8 + .cfi_rel_offset $22, 22*8 + .cfi_rel_offset $23, 23*8 + .cfi_rel_offset $24, 24*8 + .cfi_rel_offset $25, 25*8 + .cfi_rel_offset $26, 26*8 + .cfi_rel_offset $27, 27*8 + .cfi_rel_offset $28, 28*8 + .cfi_rel_offset $29, 29*8 lda $8, 0x3fff stq $31, 248($sp) bic $sp, $8, $8 @@ -228,16 +345,45 @@ entUna: ldq $28, 224($sp) ldq $gp, 232($sp) lda $sp, 256($sp) + .cfi_restore $1 + .cfi_restore $2 + .cfi_restore $3 + .cfi_restore $4 + .cfi_restore $5 + .cfi_restore $6 + .cfi_restore $7 + .cfi_restore $8 + .cfi_restore $9 + .cfi_restore $10 + .cfi_restore $11 + .cfi_restore $12 + .cfi_restore $13 + .cfi_restore $14 + .cfi_restore $15 + .cfi_restore $19 + .cfi_restore $20 + .cfi_restore $21 + .cfi_restore $22 + .cfi_restore $23 + .cfi_restore $24 + .cfi_restore $25 + .cfi_restore $26 + .cfi_restore $27 + .cfi_restore $28 + .cfi_restore $29 + .cfi_adjust_cfa_offset -256 call_pal PAL_rti -.end entUna .align 4 - .ent entUnaUser entUnaUser: + .cfi_restore_state ldq $0, 0($sp) /* restore original $0 */ lda $sp, 256($sp) /* pop entUna's stack frame */ + .cfi_restore $0 + .cfi_adjust_cfa_offset -256 SAVE_ALL /* setup normal kernel stack */ lda $sp, -56($sp) + .cfi_adjust_cfa_offset 56 stq $9, 0($sp) stq $10, 8($sp) stq $11, 16($sp) @@ -245,6 +391,13 @@ entUnaUser: stq $13, 32($sp) stq $14, 40($sp) stq $15, 48($sp) + .cfi_rel_offset $9, 0 + .cfi_rel_offset $10, 8 + .cfi_rel_offset $11, 16 + .cfi_rel_offset $12, 24 + .cfi_rel_offset $13, 32 + .cfi_rel_offset $14, 40 + .cfi_rel_offset $15, 48 lda $8, 0x3fff addq $sp, 56, $19 bic $sp, $8, $8 @@ -257,20 +410,25 @@ entUnaUser: ldq $14, 40($sp) ldq $15, 48($sp) lda $sp, 56($sp) + .cfi_restore $9 + .cfi_restore $10 + .cfi_restore $11 + .cfi_restore $12 + .cfi_restore $13 + .cfi_restore $14 + .cfi_restore $15 + .cfi_adjust_cfa_offset -56 br ret_from_sys_call -.end entUnaUser +CFI_END_OSF_FRAME entUna - .align 4 - .globl entDbg - .ent entDbg -entDbg: +CFI_START_OSF_FRAME entDbg SAVE_ALL lda $8, 0x3fff lda $26, ret_from_sys_call bic $sp, $8, $8 mov $sp, $16 jsr $31, do_entDbg -.end entDbg +CFI_END_OSF_FRAME entDbg /* * The system call entry point is special. Most importantly, it looks @@ -285,8 +443,12 @@ entDbg: .align 4 .globl entSys - .globl ret_from_sys_call - .ent entSys + .type entSys, @function + .cfi_startproc simple + .cfi_return_column 64 + .cfi_def_cfa $sp, 48 + .cfi_rel_offset 64, 8 + .cfi_rel_offset $gp, 16 entSys: SAVE_ALL lda $8, 0x3fff @@ -300,6 +462,9 @@ entSys: stq $17, SP_OFF+32($sp) s8addq $0, $5, $5 stq $18, SP_OFF+40($sp) + .cfi_rel_offset $16, SP_OFF+24 + .cfi_rel_offset $17, SP_OFF+32 + .cfi_rel_offset $18, SP_OFF+40 blbs $3, strace beq $4, 1f ldq $27, 0($5) @@ -310,6 +475,7 @@ entSys: stq $31, 72($sp) /* a3=0 => no error */ .align 4 + .globl ret_from_sys_call ret_from_sys_call: cmovne $26, 0, $18 /* $18 = 0 => non-restartable */ ldq $0, SP_OFF($sp) @@ -324,10 +490,12 @@ ret_to_user: and $17, _TIF_WORK_MASK, $2 bne $2, work_pending restore_all: + .cfi_remember_state RESTORE_ALL call_pal PAL_rti ret_to_kernel: + .cfi_restore_state lda $16, 7 call_pal PAL_swpipl br restore_all @@ -356,7 +524,6 @@ $ret_success: stq $0, 0($sp) stq $31, 72($sp) /* a3=0 => no error */ br ret_from_sys_call -.end entSys /* * Do all cleanup when returning from all interrupts and system calls. @@ -370,7 +537,7 @@ $ret_success: */ .align 4 - .ent work_pending + .type work_pending, @function work_pending: and $17, _TIF_NOTIFY_RESUME | _TIF_SIGPENDING, $2 bne $2, $work_notifysig @@ -387,23 +554,22 @@ $work_resched: $work_notifysig: mov $sp, $16 - bsr $1, do_switch_stack + DO_SWITCH_STACK jsr $26, do_work_pending - bsr $1, undo_switch_stack + UNDO_SWITCH_STACK br restore_all -.end work_pending /* * PTRACE syscall handler */ .align 4 - .ent strace + .type strace, @function strace: /* set up signal stack, call syscall_trace */ - bsr $1, do_switch_stack + DO_SWITCH_STACK jsr $26, syscall_trace_enter /* returns the syscall number */ - bsr $1, undo_switch_stack + UNDO_SWITCH_STACK /* get the arguments back.. */ ldq $16, SP_OFF+24($sp) @@ -431,9 +597,9 @@ ret_from_straced: $strace_success: stq $0, 0($sp) /* save return value */ - bsr $1, do_switch_stack + DO_SWITCH_STACK jsr $26, syscall_trace_leave - bsr $1, undo_switch_stack + UNDO_SWITCH_STACK br $31, ret_from_sys_call .align 3 @@ -447,26 +613,31 @@ $strace_error: stq $0, 0($sp) stq $1, 72($sp) /* a3 for return */ - bsr $1, do_switch_stack + DO_SWITCH_STACK mov $18, $9 /* save old syscall number */ mov $19, $10 /* save old a3 */ jsr $26, syscall_trace_leave mov $9, $18 mov $10, $19 - bsr $1, undo_switch_stack + UNDO_SWITCH_STACK mov $31, $26 /* tell "ret_from_sys_call" we can restart */ br ret_from_sys_call -.end strace +CFI_END_OSF_FRAME entSys /* * Save and restore the switch stack -- aka the balance of the user context. */ .align 4 - .ent do_switch_stack + .type do_switch_stack, @function + .cfi_startproc simple + .cfi_return_column 64 + .cfi_def_cfa $sp, 0 + .cfi_register 64, $1 do_switch_stack: lda $sp, -SWITCH_STACK_SIZE($sp) + .cfi_adjust_cfa_offset SWITCH_STACK_SIZE stq $9, 0($sp) stq $10, 8($sp) stq $11, 16($sp) @@ -510,10 +681,14 @@ do_switch_stack: stt $f0, 312($sp) # save fpcr in slot of $f31 ldt $f0, 64($sp) # dont let "do_switch_stack" change fp state. ret $31, ($1), 1 -.end do_switch_stack + .cfi_endproc + .size do_switch_stack, .-do_switch_stack .align 4 - .ent undo_switch_stack + .type undo_switch_stack, @function + .cfi_startproc simple + .cfi_def_cfa $sp, 0 + .cfi_register 64, $1 undo_switch_stack: ldq $9, 0($sp) ldq $10, 8($sp) @@ -558,7 +733,8 @@ undo_switch_stack: ldt $f30, 304($sp) lda $sp, SWITCH_STACK_SIZE($sp) ret $31, ($1), 1 -.end undo_switch_stack + .cfi_endproc + .size undo_switch_stack, .-undo_switch_stack /* * The meat of the context switch code. @@ -566,17 +742,18 @@ undo_switch_stack: .align 4 .globl alpha_switch_to - .ent alpha_switch_to + .type alpha_switch_to, @function + .cfi_startproc alpha_switch_to: - .prologue 0 - bsr $1, do_switch_stack + DO_SWITCH_STACK call_pal PAL_swpctx lda $8, 0x3fff - bsr $1, undo_switch_stack + UNDO_SWITCH_STACK bic $sp, $8, $8 mov $17, $0 ret -.end alpha_switch_to + .cfi_endproc + .size alpha_switch_to, .-alpha_switch_to /* * New processes begin life here. diff --git a/arch/alpha/kernel/irq_alpha.c b/arch/alpha/kernel/irq_alpha.c index f433fc11877a..28e4429596f3 100644 --- a/arch/alpha/kernel/irq_alpha.c +++ b/arch/alpha/kernel/irq_alpha.c @@ -236,7 +236,7 @@ void __init init_rtc_irq(void) { irq_set_chip_and_handler_name(RTC_IRQ, &dummy_irq_chip, - handle_simple_irq, "RTC"); + handle_percpu_irq, "RTC"); setup_irq(RTC_IRQ, &timer_irqaction); } diff --git a/arch/alpha/kernel/smp.c b/arch/alpha/kernel/smp.c index 53b18a620e1c..9dbbcb3b9146 100644 --- a/arch/alpha/kernel/smp.c +++ b/arch/alpha/kernel/smp.c @@ -264,9 +264,10 @@ recv_secondary_console_msg(void) if (cnt <= 0 || cnt >= 80) strcpy(buf, "<<< BOGUS MSG >>>"); else { - cp1 = (char *) &cpu->ipc_buffer[11]; + cp1 = (char *) &cpu->ipc_buffer[1]; cp2 = buf; - strcpy(cp2, cp1); + memcpy(cp2, cp1, cnt); + cp2[cnt] = '\0'; while ((cp2 = strchr(cp2, '\r')) != 0) { *cp2 = ' '; diff --git a/arch/alpha/kernel/sys_dp264.c b/arch/alpha/kernel/sys_dp264.c index 5bf401f7ea97..6c35159bc00e 100644 --- a/arch/alpha/kernel/sys_dp264.c +++ b/arch/alpha/kernel/sys_dp264.c @@ -190,9 +190,6 @@ static struct irq_chip clipper_irq_type = { static void dp264_device_interrupt(unsigned long vector) { -#if 1 - printk("dp264_device_interrupt: NOT IMPLEMENTED YET!!\n"); -#else unsigned long pld; unsigned int i; @@ -210,12 +207,7 @@ dp264_device_interrupt(unsigned long vector) isa_device_interrupt(vector); else handle_irq(16 + i); -#if 0 - TSUNAMI_cchip->dir0.csr = 1UL << i; mb(); - tmp = TSUNAMI_cchip->dir0.csr; -#endif } -#endif } static void diff --git a/arch/alpha/kernel/sys_marvel.c b/arch/alpha/kernel/sys_marvel.c index 407accc80877..c92e389ff219 100644 --- a/arch/alpha/kernel/sys_marvel.c +++ b/arch/alpha/kernel/sys_marvel.c @@ -317,8 +317,9 @@ marvel_init_irq(void) } static int -marvel_map_irq(struct pci_dev *dev, u8 slot, u8 pin) +marvel_map_irq(const struct pci_dev *cdev, u8 slot, u8 pin) { + struct pci_dev *dev = (struct pci_dev *)cdev; struct pci_controller *hose = dev->sysdata; struct io7_port *io7_port = hose->sysdata; struct io7 *io7 = io7_port->io7; diff --git a/arch/alpha/kernel/systbls.S b/arch/alpha/kernel/systbls.S index 4284ec798ec9..dca9b3fb0071 100644 --- a/arch/alpha/kernel/systbls.S +++ b/arch/alpha/kernel/systbls.S @@ -524,6 +524,8 @@ sys_call_table: .quad sys_sendmmsg .quad sys_process_vm_readv .quad sys_process_vm_writev /* 505 */ + .quad sys_kcmp + .quad sys_finit_module .size sys_call_table, . - sys_call_table .type sys_call_table, @object diff --git a/arch/alpha/kernel/time.c b/arch/alpha/kernel/time.c index e336694ca042..ea3395036556 100644 --- a/arch/alpha/kernel/time.c +++ b/arch/alpha/kernel/time.c @@ -105,9 +105,7 @@ void arch_irq_work_raise(void) static inline __u32 rpcc(void) { - __u32 result; - asm volatile ("rpcc %0" : "=r"(result)); - return result; + return __builtin_alpha_rpcc(); } int update_persistent_clock(struct timespec now) diff --git a/arch/alpha/kernel/traps.c b/arch/alpha/kernel/traps.c index be1fba334bd0..bd0665cdc840 100644 --- a/arch/alpha/kernel/traps.c +++ b/arch/alpha/kernel/traps.c @@ -66,8 +66,8 @@ dik_show_regs(struct pt_regs *regs, unsigned long *r9_15) { printk("pc = [<%016lx>] ra = [<%016lx>] ps = %04lx %s\n", regs->pc, regs->r26, regs->ps, print_tainted()); - print_symbol("pc is at %s\n", regs->pc); - print_symbol("ra is at %s\n", regs->r26 ); + printk("pc is at %pSR\n", (void *)regs->pc); + printk("ra is at %pSR\n", (void *)regs->r26); printk("v0 = %016lx t0 = %016lx t1 = %016lx\n", regs->r0, regs->r1, regs->r2); printk("t2 = %016lx t3 = %016lx t4 = %016lx\n", @@ -132,9 +132,7 @@ dik_show_trace(unsigned long *sp) continue; if (tmp >= (unsigned long) &_etext) continue; - printk("[<%lx>]", tmp); - print_symbol(" %s", tmp); - printk("\n"); + printk("[<%lx>] %pSR\n", tmp, (void *)tmp); if (i > 40) { printk(" ..."); break; diff --git a/arch/powerpc/include/asm/eeh.h b/arch/powerpc/include/asm/eeh.h index 09a8743143f3..d3e5e9bc8f94 100644 --- a/arch/powerpc/include/asm/eeh.h +++ b/arch/powerpc/include/asm/eeh.h @@ -55,6 +55,8 @@ struct device_node; #define EEH_PE_RECOVERING (1 << 1) /* Recovering PE */ #define EEH_PE_PHB_DEAD (1 << 2) /* Dead PHB */ +#define EEH_PE_KEEP (1 << 8) /* Keep PE on hotplug */ + struct eeh_pe { int type; /* PE type: PHB/Bus/Device */ int state; /* PE EEH dependent mode */ @@ -72,8 +74,8 @@ struct eeh_pe { struct list_head child; /* Child PEs */ }; -#define eeh_pe_for_each_dev(pe, edev) \ - list_for_each_entry(edev, &pe->edevs, list) +#define eeh_pe_for_each_dev(pe, edev, tmp) \ + list_for_each_entry_safe(edev, tmp, &pe->edevs, list) /* * The struct is used to trace EEH state for the associated @@ -82,7 +84,13 @@ struct eeh_pe { * another tree except the currently existing tree of PCI * buses and PCI devices */ -#define EEH_DEV_IRQ_DISABLED (1<<0) /* Interrupt disabled */ +#define EEH_DEV_BRIDGE (1 << 0) /* PCI bridge */ +#define EEH_DEV_ROOT_PORT (1 << 1) /* PCIe root port */ +#define EEH_DEV_DS_PORT (1 << 2) /* Downstream port */ +#define EEH_DEV_IRQ_DISABLED (1 << 3) /* Interrupt disabled */ +#define EEH_DEV_DISCONNECTED (1 << 4) /* Removing from PE */ + +#define EEH_DEV_SYSFS (1 << 8) /* Sysfs created */ struct eeh_dev { int mode; /* EEH mode */ @@ -90,11 +98,13 @@ struct eeh_dev { int config_addr; /* Config address */ int pe_config_addr; /* PE config address */ u32 config_space[16]; /* Saved PCI config space */ + u8 pcie_cap; /* Saved PCIe capability */ struct eeh_pe *pe; /* Associated PE */ struct list_head list; /* Form link list in the PE */ struct pci_controller *phb; /* Associated PHB */ struct device_node *dn; /* Associated device node */ struct pci_dev *pdev; /* Associated PCI device */ + struct pci_bus *bus; /* PCI bus for partial hotplug */ }; static inline struct device_node *eeh_dev_to_of_node(struct eeh_dev *edev) @@ -193,8 +203,10 @@ int eeh_phb_pe_create(struct pci_controller *phb); struct eeh_pe *eeh_phb_pe_get(struct pci_controller *phb); struct eeh_pe *eeh_pe_get(struct eeh_dev *edev); int eeh_add_to_parent_pe(struct eeh_dev *edev); -int eeh_rmv_from_parent_pe(struct eeh_dev *edev, int purge_pe); +int eeh_rmv_from_parent_pe(struct eeh_dev *edev); void eeh_pe_update_time_stamp(struct eeh_pe *pe); +void *eeh_pe_traverse(struct eeh_pe *root, + eeh_traverse_func fn, void *flag); void *eeh_pe_dev_traverse(struct eeh_pe *root, eeh_traverse_func fn, void *flag); void eeh_pe_restore_bars(struct eeh_pe *pe); @@ -209,10 +221,12 @@ unsigned long eeh_check_failure(const volatile void __iomem *token, unsigned long val); int eeh_dev_check_failure(struct eeh_dev *edev); void eeh_addr_cache_build(void); +void eeh_add_device_early(struct device_node *); void eeh_add_device_tree_early(struct device_node *); +void eeh_add_device_late(struct pci_dev *); void eeh_add_device_tree_late(struct pci_bus *); void eeh_add_sysfs_files(struct pci_bus *); -void eeh_remove_bus_device(struct pci_dev *, int); +void eeh_remove_device(struct pci_dev *); /** * EEH_POSSIBLE_ERROR() -- test for possible MMIO failure. @@ -252,13 +266,17 @@ static inline unsigned long eeh_check_failure(const volatile void __iomem *token static inline void eeh_addr_cache_build(void) { } +static inline void eeh_add_device_early(struct device_node *dn) { } + static inline void eeh_add_device_tree_early(struct device_node *dn) { } +static inline void eeh_add_device_late(struct pci_dev *dev) { } + static inline void eeh_add_device_tree_late(struct pci_bus *bus) { } static inline void eeh_add_sysfs_files(struct pci_bus *bus) { } -static inline void eeh_remove_bus_device(struct pci_dev *dev, int purge_pe) { } +static inline void eeh_remove_device(struct pci_dev *dev) { } #define EEH_POSSIBLE_ERROR(val, type) (0) #define EEH_IO_ERROR_VALUE(size) (-1UL) diff --git a/arch/powerpc/include/asm/hw_irq.h b/arch/powerpc/include/asm/hw_irq.h index ba713f166fa5..10be1dd01c6b 100644 --- a/arch/powerpc/include/asm/hw_irq.h +++ b/arch/powerpc/include/asm/hw_irq.h @@ -96,10 +96,11 @@ static inline bool arch_irqs_disabled(void) #endif #define hard_irq_disable() do { \ - u8 _was_enabled = get_paca()->soft_enabled; \ + u8 _was_enabled; \ __hard_irq_disable(); \ - get_paca()->soft_enabled = 0; \ - get_paca()->irq_happened |= PACA_IRQ_HARD_DIS; \ + _was_enabled = local_paca->soft_enabled; \ + local_paca->soft_enabled = 0; \ + local_paca->irq_happened |= PACA_IRQ_HARD_DIS; \ if (_was_enabled) \ trace_hardirqs_off(); \ } while(0) diff --git a/arch/powerpc/include/asm/module.h b/arch/powerpc/include/asm/module.h index c1df590ec444..49fa55bfbac4 100644 --- a/arch/powerpc/include/asm/module.h +++ b/arch/powerpc/include/asm/module.h @@ -82,10 +82,9 @@ struct exception_table_entry; void sort_ex_table(struct exception_table_entry *start, struct exception_table_entry *finish); -#ifdef CONFIG_MODVERSIONS +#if defined(CONFIG_MODVERSIONS) && defined(CONFIG_PPC64) #define ARCH_RELOCATES_KCRCTAB - -extern const unsigned long reloc_start[]; +#define reloc_start PHYSICAL_START #endif #endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_MODULE_H */ diff --git a/arch/powerpc/include/asm/pci-bridge.h b/arch/powerpc/include/asm/pci-bridge.h index 2c1d8cb9b265..32d0d2018faf 100644 --- a/arch/powerpc/include/asm/pci-bridge.h +++ b/arch/powerpc/include/asm/pci-bridge.h @@ -209,7 +209,6 @@ static inline struct eeh_dev *of_node_to_eeh_dev(struct device_node *dn) extern struct pci_bus *pcibios_find_pci_bus(struct device_node *dn); /** Remove all of the PCI devices under this bus */ -extern void __pcibios_remove_pci_devices(struct pci_bus *bus, int purge_pe); extern void pcibios_remove_pci_devices(struct pci_bus *bus); /** Discover new pci devices under this bus, and add them */ diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h index 5d7d9c2a5473..a6840e4e24f7 100644 --- a/arch/powerpc/include/asm/reg.h +++ b/arch/powerpc/include/asm/reg.h @@ -1088,7 +1088,8 @@ #define PVR_970MP 0x0044 #define PVR_970GX 0x0045 #define PVR_POWER7p 0x004A -#define PVR_POWER8 0x004B +#define PVR_POWER8E 0x004B +#define PVR_POWER8 0x004D #define PVR_BE 0x0070 #define PVR_PA6T 0x0090 diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c index 2a45d0f04385..22973a74df73 100644 --- a/arch/powerpc/kernel/cputable.c +++ b/arch/powerpc/kernel/cputable.c @@ -494,9 +494,27 @@ static struct cpu_spec __initdata cpu_specs[] = { .cpu_restore = __restore_cpu_power7, .platform = "power7+", }, - { /* Power8 */ + { /* Power8E */ .pvr_mask = 0xffff0000, .pvr_value = 0x004b0000, + .cpu_name = "POWER8E (raw)", + .cpu_features = CPU_FTRS_POWER8, + .cpu_user_features = COMMON_USER_POWER8, + .cpu_user_features2 = COMMON_USER2_POWER8, + .mmu_features = MMU_FTRS_POWER8, + .icache_bsize = 128, + .dcache_bsize = 128, + .num_pmcs = 6, + .pmc_type = PPC_PMC_IBM, + .oprofile_cpu_type = "ppc64/power8", + .oprofile_type = PPC_OPROFILE_INVALID, + .cpu_setup = __setup_cpu_power8, + .cpu_restore = __restore_cpu_power8, + .platform = "power8", + }, + { /* Power8 */ + .pvr_mask = 0xffff0000, + .pvr_value = 0x004d0000, .cpu_name = "POWER8 (raw)", .cpu_features = CPU_FTRS_POWER8, .cpu_user_features = COMMON_USER_POWER8, diff --git a/arch/powerpc/kernel/eeh.c b/arch/powerpc/kernel/eeh.c index 39954fe941b8..ea9414c8088d 100644 --- a/arch/powerpc/kernel/eeh.c +++ b/arch/powerpc/kernel/eeh.c @@ -231,7 +231,7 @@ static size_t eeh_gather_pci_data(struct eeh_dev *edev, char * buf, size_t len) void eeh_slot_error_detail(struct eeh_pe *pe, int severity) { size_t loglen = 0; - struct eeh_dev *edev; + struct eeh_dev *edev, *tmp; bool valid_cfg_log = true; /* @@ -251,7 +251,7 @@ void eeh_slot_error_detail(struct eeh_pe *pe, int severity) eeh_pe_restore_bars(pe); pci_regs_buf[0] = 0; - eeh_pe_for_each_dev(pe, edev) { + eeh_pe_for_each_dev(pe, edev, tmp) { loglen += eeh_gather_pci_data(edev, pci_regs_buf + loglen, EEH_PCI_REGS_LOG_LEN - loglen); } @@ -499,8 +499,6 @@ unsigned long eeh_check_failure(const volatile void __iomem *token, unsigned lon } eeh_dev_check_failure(edev); - - pci_dev_put(eeh_dev_to_pci_dev(edev)); return val; } @@ -838,7 +836,7 @@ core_initcall_sync(eeh_init); * on the CEC architecture, type of the device, on earlier boot * command-line arguments & etc. */ -static void eeh_add_device_early(struct device_node *dn) +void eeh_add_device_early(struct device_node *dn) { struct pci_controller *phb; @@ -886,7 +884,7 @@ EXPORT_SYMBOL_GPL(eeh_add_device_tree_early); * This routine must be used to complete EEH initialization for PCI * devices that were added after system boot (e.g. hotplug, dlpar). */ -static void eeh_add_device_late(struct pci_dev *dev) +void eeh_add_device_late(struct pci_dev *dev) { struct device_node *dn; struct eeh_dev *edev; @@ -902,9 +900,23 @@ static void eeh_add_device_late(struct pci_dev *dev) pr_debug("EEH: Already referenced !\n"); return; } - WARN_ON(edev->pdev); - pci_dev_get(dev); + /* + * The EEH cache might not be removed correctly because of + * unbalanced kref to the device during unplug time, which + * relies on pcibios_release_device(). So we have to remove + * that here explicitly. + */ + if (edev->pdev) { + eeh_rmv_from_parent_pe(edev); + eeh_addr_cache_rmv_dev(edev->pdev); + eeh_sysfs_remove_device(edev->pdev); + edev->mode &= ~EEH_DEV_SYSFS; + + edev->pdev = NULL; + dev->dev.archdata.edev = NULL; + } + edev->pdev = dev; dev->dev.archdata.edev = edev; @@ -967,7 +979,6 @@ EXPORT_SYMBOL_GPL(eeh_add_sysfs_files); /** * eeh_remove_device - Undo EEH setup for the indicated pci device * @dev: pci device to be removed - * @purge_pe: remove the PE or not * * This routine should be called when a device is removed from * a running system (e.g. by hotplug or dlpar). It unregisters @@ -975,7 +986,7 @@ EXPORT_SYMBOL_GPL(eeh_add_sysfs_files); * this device will no longer be detected after this call; thus, * i/o errors affecting this slot may leave this device unusable. */ -static void eeh_remove_device(struct pci_dev *dev, int purge_pe) +void eeh_remove_device(struct pci_dev *dev) { struct eeh_dev *edev; @@ -986,42 +997,29 @@ static void eeh_remove_device(struct pci_dev *dev, int purge_pe) /* Unregister the device with the EEH/PCI address search system */ pr_debug("EEH: Removing device %s\n", pci_name(dev)); - if (!edev || !edev->pdev) { + if (!edev || !edev->pdev || !edev->pe) { pr_debug("EEH: Not referenced !\n"); return; } + + /* + * During the hotplug for EEH error recovery, we need the EEH + * device attached to the parent PE in order for BAR restore + * a bit later. So we keep it for BAR restore and remove it + * from the parent PE during the BAR resotre. + */ edev->pdev = NULL; dev->dev.archdata.edev = NULL; - pci_dev_put(dev); + if (!(edev->pe->state & EEH_PE_KEEP)) + eeh_rmv_from_parent_pe(edev); + else + edev->mode |= EEH_DEV_DISCONNECTED; - eeh_rmv_from_parent_pe(edev, purge_pe); eeh_addr_cache_rmv_dev(dev); eeh_sysfs_remove_device(dev); + edev->mode &= ~EEH_DEV_SYSFS; } -/** - * eeh_remove_bus_device - Undo EEH setup for the indicated PCI device - * @dev: PCI device - * @purge_pe: remove the corresponding PE or not - * - * This routine must be called when a device is removed from the - * running system through hotplug or dlpar. The corresponding - * PCI address cache will be removed. - */ -void eeh_remove_bus_device(struct pci_dev *dev, int purge_pe) -{ - struct pci_bus *bus = dev->subordinate; - struct pci_dev *child, *tmp; - - eeh_remove_device(dev, purge_pe); - - if (bus && dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) { - list_for_each_entry_safe(child, tmp, &bus->devices, bus_list) - eeh_remove_bus_device(child, purge_pe); - } -} -EXPORT_SYMBOL_GPL(eeh_remove_bus_device); - static int proc_eeh_show(struct seq_file *m, void *v) { if (0 == eeh_subsystem_enabled) { diff --git a/arch/powerpc/kernel/eeh_cache.c b/arch/powerpc/kernel/eeh_cache.c index f9ac1232a746..e8c9fd546a5c 100644 --- a/arch/powerpc/kernel/eeh_cache.c +++ b/arch/powerpc/kernel/eeh_cache.c @@ -68,16 +68,12 @@ static inline struct eeh_dev *__eeh_addr_cache_get_device(unsigned long addr) struct pci_io_addr_range *piar; piar = rb_entry(n, struct pci_io_addr_range, rb_node); - if (addr < piar->addr_lo) { + if (addr < piar->addr_lo) n = n->rb_left; - } else { - if (addr > piar->addr_hi) { - n = n->rb_right; - } else { - pci_dev_get(piar->pcidev); - return piar->edev; - } - } + else if (addr > piar->addr_hi) + n = n->rb_right; + else + return piar->edev; } return NULL; @@ -156,7 +152,6 @@ eeh_addr_cache_insert(struct pci_dev *dev, unsigned long alo, if (!piar) return NULL; - pci_dev_get(dev); piar->addr_lo = alo; piar->addr_hi = ahi; piar->edev = pci_dev_to_eeh_dev(dev); @@ -250,7 +245,6 @@ restart: if (piar->pcidev == dev) { rb_erase(n, &pci_io_addr_cache_root.rb_root); - pci_dev_put(piar->pcidev); kfree(piar); goto restart; } @@ -302,12 +296,10 @@ void eeh_addr_cache_build(void) if (!edev) continue; - pci_dev_get(dev); /* matching put is in eeh_remove_device() */ dev->dev.archdata.edev = edev; edev->pdev = dev; eeh_addr_cache_insert_dev(dev); - eeh_sysfs_add_device(dev); } diff --git a/arch/powerpc/kernel/eeh_driver.c b/arch/powerpc/kernel/eeh_driver.c index 2b1ce17cae50..36bed5a12750 100644 --- a/arch/powerpc/kernel/eeh_driver.c +++ b/arch/powerpc/kernel/eeh_driver.c @@ -143,10 +143,14 @@ static void eeh_disable_irq(struct pci_dev *dev) static void eeh_enable_irq(struct pci_dev *dev) { struct eeh_dev *edev = pci_dev_to_eeh_dev(dev); + struct irq_desc *desc; if ((edev->mode) & EEH_DEV_IRQ_DISABLED) { edev->mode &= ~EEH_DEV_IRQ_DISABLED; - enable_irq(dev->irq); + + desc = irq_to_desc(dev->irq); + if (desc && desc->depth > 0) + enable_irq(dev->irq); } } @@ -338,6 +342,54 @@ static void *eeh_report_failure(void *data, void *userdata) return NULL; } +static void *eeh_rmv_device(void *data, void *userdata) +{ + struct pci_driver *driver; + struct eeh_dev *edev = (struct eeh_dev *)data; + struct pci_dev *dev = eeh_dev_to_pci_dev(edev); + int *removed = (int *)userdata; + + /* + * Actually, we should remove the PCI bridges as well. + * However, that's lots of complexity to do that, + * particularly some of devices under the bridge might + * support EEH. So we just care about PCI devices for + * simplicity here. + */ + if (!dev || (dev->hdr_type & PCI_HEADER_TYPE_BRIDGE)) + return NULL; + driver = eeh_pcid_get(dev); + if (driver && driver->err_handler) + return NULL; + + /* Remove it from PCI subsystem */ + pr_debug("EEH: Removing %s without EEH sensitive driver\n", + pci_name(dev)); + edev->bus = dev->bus; + edev->mode |= EEH_DEV_DISCONNECTED; + (*removed)++; + + pci_stop_and_remove_bus_device(dev); + + return NULL; +} + +static void *eeh_pe_detach_dev(void *data, void *userdata) +{ + struct eeh_pe *pe = (struct eeh_pe *)data; + struct eeh_dev *edev, *tmp; + + eeh_pe_for_each_dev(pe, edev, tmp) { + if (!(edev->mode & EEH_DEV_DISCONNECTED)) + continue; + + edev->mode &= ~(EEH_DEV_DISCONNECTED | EEH_DEV_IRQ_DISABLED); + eeh_rmv_from_parent_pe(edev); + } + + return NULL; +} + /** * eeh_reset_device - Perform actual reset of a pci slot * @pe: EEH PE @@ -349,8 +401,9 @@ static void *eeh_report_failure(void *data, void *userdata) */ static int eeh_reset_device(struct eeh_pe *pe, struct pci_bus *bus) { + struct pci_bus *frozen_bus = eeh_pe_bus_get(pe); struct timeval tstamp; - int cnt, rc; + int cnt, rc, removed = 0; /* pcibios will clear the counter; save the value */ cnt = pe->freeze_count; @@ -362,8 +415,11 @@ static int eeh_reset_device(struct eeh_pe *pe, struct pci_bus *bus) * devices are expected to be attached soon when calling * into pcibios_add_pci_devices(). */ + eeh_pe_state_mark(pe, EEH_PE_KEEP); if (bus) - __pcibios_remove_pci_devices(bus, 0); + pcibios_remove_pci_devices(bus); + else if (frozen_bus) + eeh_pe_dev_traverse(pe, eeh_rmv_device, &removed); /* Reset the pci controller. (Asserts RST#; resets config space). * Reconfigure bridges and devices. Don't try to bring the system @@ -384,9 +440,24 @@ static int eeh_reset_device(struct eeh_pe *pe, struct pci_bus *bus) * potentially weird things happen. */ if (bus) { + pr_info("EEH: Sleep 5s ahead of complete hotplug\n"); ssleep(5); + + /* + * The EEH device is still connected with its parent + * PE. We should disconnect it so the binding can be + * rebuilt when adding PCI devices. + */ + eeh_pe_traverse(pe, eeh_pe_detach_dev, NULL); pcibios_add_pci_devices(bus); + } else if (frozen_bus && removed) { + pr_info("EEH: Sleep 5s ahead of partial hotplug\n"); + ssleep(5); + + eeh_pe_traverse(pe, eeh_pe_detach_dev, NULL); + pcibios_add_pci_devices(frozen_bus); } + eeh_pe_state_clear(pe, EEH_PE_KEEP); pe->tstamp = tstamp; pe->freeze_count = cnt; diff --git a/arch/powerpc/kernel/eeh_pe.c b/arch/powerpc/kernel/eeh_pe.c index 016588a6f5ed..f9450537e335 100644 --- a/arch/powerpc/kernel/eeh_pe.c +++ b/arch/powerpc/kernel/eeh_pe.c @@ -149,8 +149,8 @@ static struct eeh_pe *eeh_pe_next(struct eeh_pe *pe, * callback returns something other than NULL, or no more PEs * to be traversed. */ -static void *eeh_pe_traverse(struct eeh_pe *root, - eeh_traverse_func fn, void *flag) +void *eeh_pe_traverse(struct eeh_pe *root, + eeh_traverse_func fn, void *flag) { struct eeh_pe *pe; void *ret; @@ -176,7 +176,7 @@ void *eeh_pe_dev_traverse(struct eeh_pe *root, eeh_traverse_func fn, void *flag) { struct eeh_pe *pe; - struct eeh_dev *edev; + struct eeh_dev *edev, *tmp; void *ret; if (!root) { @@ -186,7 +186,7 @@ void *eeh_pe_dev_traverse(struct eeh_pe *root, /* Traverse root PE */ for (pe = root; pe; pe = eeh_pe_next(pe, root)) { - eeh_pe_for_each_dev(pe, edev) { + eeh_pe_for_each_dev(pe, edev, tmp) { ret = fn(edev, flag); if (ret) return ret; @@ -333,7 +333,7 @@ int eeh_add_to_parent_pe(struct eeh_dev *edev) while (parent) { if (!(parent->type & EEH_PE_INVALID)) break; - parent->type &= ~EEH_PE_INVALID; + parent->type &= ~(EEH_PE_INVALID | EEH_PE_KEEP); parent = parent->parent; } pr_debug("EEH: Add %s to Device PE#%x, Parent PE#%x\n", @@ -397,21 +397,20 @@ int eeh_add_to_parent_pe(struct eeh_dev *edev) /** * eeh_rmv_from_parent_pe - Remove one EEH device from the associated PE * @edev: EEH device - * @purge_pe: remove PE or not * * The PE hierarchy tree might be changed when doing PCI hotplug. * Also, the PCI devices or buses could be removed from the system * during EEH recovery. So we have to call the function remove the * corresponding PE accordingly if necessary. */ -int eeh_rmv_from_parent_pe(struct eeh_dev *edev, int purge_pe) +int eeh_rmv_from_parent_pe(struct eeh_dev *edev) { struct eeh_pe *pe, *parent, *child; int cnt; if (!edev->pe) { - pr_warning("%s: No PE found for EEH device %s\n", - __func__, edev->dn->full_name); + pr_debug("%s: No PE found for EEH device %s\n", + __func__, edev->dn->full_name); return -EEXIST; } @@ -431,7 +430,7 @@ int eeh_rmv_from_parent_pe(struct eeh_dev *edev, int purge_pe) if (pe->type & EEH_PE_PHB) break; - if (purge_pe) { + if (!(pe->state & EEH_PE_KEEP)) { if (list_empty(&pe->edevs) && list_empty(&pe->child_list)) { list_del(&pe->child); @@ -502,7 +501,7 @@ static void *__eeh_pe_state_mark(void *data, void *flag) { struct eeh_pe *pe = (struct eeh_pe *)data; int state = *((int *)flag); - struct eeh_dev *tmp; + struct eeh_dev *edev, *tmp; struct pci_dev *pdev; /* @@ -512,8 +511,8 @@ static void *__eeh_pe_state_mark(void *data, void *flag) * the PCI device driver. */ pe->state |= state; - eeh_pe_for_each_dev(pe, tmp) { - pdev = eeh_dev_to_pci_dev(tmp); + eeh_pe_for_each_dev(pe, edev, tmp) { + pdev = eeh_dev_to_pci_dev(edev); if (pdev) pdev->error_state = pci_channel_io_frozen; } @@ -579,7 +578,7 @@ void eeh_pe_state_clear(struct eeh_pe *pe, int state) * blocked on normal path during the stage. So we need utilize * eeh operations, which is always permitted. */ -static void eeh_bridge_check_link(struct pci_dev *pdev, +static void eeh_bridge_check_link(struct eeh_dev *edev, struct device_node *dn) { int cap; @@ -590,16 +589,17 @@ static void eeh_bridge_check_link(struct pci_dev *pdev, * We only check root port and downstream ports of * PCIe switches */ - if (!pci_is_pcie(pdev) || - (pci_pcie_type(pdev) != PCI_EXP_TYPE_ROOT_PORT && - pci_pcie_type(pdev) != PCI_EXP_TYPE_DOWNSTREAM)) + if (!(edev->mode & (EEH_DEV_ROOT_PORT | EEH_DEV_DS_PORT))) return; - pr_debug("%s: Check PCIe link for %s ...\n", - __func__, pci_name(pdev)); + pr_debug("%s: Check PCIe link for %04x:%02x:%02x.%01x ...\n", + __func__, edev->phb->global_number, + edev->config_addr >> 8, + PCI_SLOT(edev->config_addr & 0xFF), + PCI_FUNC(edev->config_addr & 0xFF)); /* Check slot status */ - cap = pdev->pcie_cap; + cap = edev->pcie_cap; eeh_ops->read_config(dn, cap + PCI_EXP_SLTSTA, 2, &val); if (!(val & PCI_EXP_SLTSTA_PDS)) { pr_debug(" No card in the slot (0x%04x) !\n", val); @@ -653,8 +653,7 @@ static void eeh_bridge_check_link(struct pci_dev *pdev, #define BYTE_SWAP(OFF) (8*((OFF)/4)+3-(OFF)) #define SAVED_BYTE(OFF) (((u8 *)(edev->config_space))[BYTE_SWAP(OFF)]) -static void eeh_restore_bridge_bars(struct pci_dev *pdev, - struct eeh_dev *edev, +static void eeh_restore_bridge_bars(struct eeh_dev *edev, struct device_node *dn) { int i; @@ -680,7 +679,7 @@ static void eeh_restore_bridge_bars(struct pci_dev *pdev, eeh_ops->write_config(dn, PCI_COMMAND, 4, edev->config_space[1]); /* Check the PCIe link is ready */ - eeh_bridge_check_link(pdev, dn); + eeh_bridge_check_link(edev, dn); } static void eeh_restore_device_bars(struct eeh_dev *edev, @@ -729,19 +728,12 @@ static void eeh_restore_device_bars(struct eeh_dev *edev, */ static void *eeh_restore_one_device_bars(void *data, void *flag) { - struct pci_dev *pdev = NULL; struct eeh_dev *edev = (struct eeh_dev *)data; struct device_node *dn = eeh_dev_to_of_node(edev); - /* Trace the PCI bridge */ - if (eeh_probe_mode_dev()) { - pdev = eeh_dev_to_pci_dev(edev); - if (pdev->hdr_type != PCI_HEADER_TYPE_BRIDGE) - pdev = NULL; - } - - if (pdev) - eeh_restore_bridge_bars(pdev, edev, dn); + /* Do special restore for bridges */ + if (edev->mode & EEH_DEV_BRIDGE) + eeh_restore_bridge_bars(edev, dn); else eeh_restore_device_bars(edev, dn); diff --git a/arch/powerpc/kernel/eeh_sysfs.c b/arch/powerpc/kernel/eeh_sysfs.c index e7ae3484918c..5d753d4f2c75 100644 --- a/arch/powerpc/kernel/eeh_sysfs.c +++ b/arch/powerpc/kernel/eeh_sysfs.c @@ -56,19 +56,40 @@ EEH_SHOW_ATTR(eeh_pe_config_addr, pe_config_addr, "0x%x"); void eeh_sysfs_add_device(struct pci_dev *pdev) { + struct eeh_dev *edev = pci_dev_to_eeh_dev(pdev); int rc=0; + if (edev && (edev->mode & EEH_DEV_SYSFS)) + return; + rc += device_create_file(&pdev->dev, &dev_attr_eeh_mode); rc += device_create_file(&pdev->dev, &dev_attr_eeh_config_addr); rc += device_create_file(&pdev->dev, &dev_attr_eeh_pe_config_addr); if (rc) printk(KERN_WARNING "EEH: Unable to create sysfs entries\n"); + else if (edev) + edev->mode |= EEH_DEV_SYSFS; } void eeh_sysfs_remove_device(struct pci_dev *pdev) { + struct eeh_dev *edev = pci_dev_to_eeh_dev(pdev); + + /* + * The parent directory might have been removed. We needn't + * continue for that case. + */ + if (!pdev->dev.kobj.sd) { + if (edev) + edev->mode &= ~EEH_DEV_SYSFS; + return; + } + device_remove_file(&pdev->dev, &dev_attr_eeh_mode); device_remove_file(&pdev->dev, &dev_attr_eeh_config_addr); device_remove_file(&pdev->dev, &dev_attr_eeh_pe_config_addr); + + if (edev) + edev->mode &= ~EEH_DEV_SYSFS; } diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c index f46914a0f33e..7d22a675fe1a 100644 --- a/arch/powerpc/kernel/pci-common.c +++ b/arch/powerpc/kernel/pci-common.c @@ -1462,6 +1462,8 @@ void pcibios_finish_adding_to_bus(struct pci_bus *bus) /* Allocate bus and devices resources */ pcibios_allocate_bus_resources(bus); pcibios_claim_one_bus(bus); + if (!pci_has_flag(PCI_PROBE_ONLY)) + pci_assign_unassigned_bus_resources(bus); /* Fixup EEH */ eeh_add_device_tree_late(bus); diff --git a/arch/powerpc/kernel/pci-hotplug.c b/arch/powerpc/kernel/pci-hotplug.c index 3f608800c06b..c1e17ae68a08 100644 --- a/arch/powerpc/kernel/pci-hotplug.c +++ b/arch/powerpc/kernel/pci-hotplug.c @@ -22,45 +22,40 @@ #include <asm/eeh.h> /** - * __pcibios_remove_pci_devices - remove all devices under this bus + * pcibios_release_device - release PCI device + * @dev: PCI device + * + * The function is called before releasing the indicated PCI device. + */ +void pcibios_release_device(struct pci_dev *dev) +{ + eeh_remove_device(dev); +} + +/** + * pcibios_remove_pci_devices - remove all devices under this bus * @bus: the indicated PCI bus - * @purge_pe: destroy the PE on removal of PCI devices * * Remove all of the PCI devices under this bus both from the * linux pci device tree, and from the powerpc EEH address cache. - * By default, the corresponding PE will be destroied during the - * normal PCI hotplug path. For PCI hotplug during EEH recovery, - * the corresponding PE won't be destroied and deallocated. */ -void __pcibios_remove_pci_devices(struct pci_bus *bus, int purge_pe) +void pcibios_remove_pci_devices(struct pci_bus *bus) { struct pci_dev *dev, *tmp; struct pci_bus *child_bus; /* First go down child busses */ list_for_each_entry(child_bus, &bus->children, node) - __pcibios_remove_pci_devices(child_bus, purge_pe); + pcibios_remove_pci_devices(child_bus); pr_debug("PCI: Removing devices on bus %04x:%02x\n", pci_domain_nr(bus), bus->number); list_for_each_entry_safe(dev, tmp, &bus->devices, bus_list) { - pr_debug(" * Removing %s...\n", pci_name(dev)); - eeh_remove_bus_device(dev, purge_pe); + pr_debug(" Removing %s...\n", pci_name(dev)); pci_stop_and_remove_bus_device(dev); } } -/** - * pcibios_remove_pci_devices - remove all devices under this bus - * @bus: the indicated PCI bus - * - * Remove all of the PCI devices under this bus both from the - * linux pci device tree, and from the powerpc EEH address cache. - */ -void pcibios_remove_pci_devices(struct pci_bus *bus) -{ - __pcibios_remove_pci_devices(bus, 1); -} EXPORT_SYMBOL_GPL(pcibios_remove_pci_devices); /** @@ -76,7 +71,7 @@ EXPORT_SYMBOL_GPL(pcibios_remove_pci_devices); */ void pcibios_add_pci_devices(struct pci_bus * bus) { - int slotno, num, mode, pass, max; + int slotno, mode, pass, max; struct pci_dev *dev; struct device_node *dn = pci_bus_to_OF_node(bus); @@ -90,11 +85,15 @@ void pcibios_add_pci_devices(struct pci_bus * bus) /* use ofdt-based probe */ of_rescan_bus(dn, bus); } else if (mode == PCI_PROBE_NORMAL) { - /* use legacy probe */ + /* + * Use legacy probe. In the partial hotplug case, we + * probably have grandchildren devices unplugged. So + * we don't check the return value from pci_scan_slot() in + * order for fully rescan all the way down to pick them up. + * They can have been removed during partial hotplug. + */ slotno = PCI_SLOT(PCI_DN(dn->child)->devfn); - num = pci_scan_slot(bus, PCI_DEVFN(slotno, 0)); - if (!num) - return; + pci_scan_slot(bus, PCI_DEVFN(slotno, 0)); pcibios_setup_bus_devices(bus); max = bus->busn_res.start; for (pass = 0; pass < 2; pass++) { diff --git a/arch/powerpc/kernel/pci_of_scan.c b/arch/powerpc/kernel/pci_of_scan.c index 6b0ba5854d99..15d9105323bf 100644 --- a/arch/powerpc/kernel/pci_of_scan.c +++ b/arch/powerpc/kernel/pci_of_scan.c @@ -230,11 +230,14 @@ void of_scan_pci_bridge(struct pci_dev *dev) return; } - bus = pci_add_new_bus(dev->bus, dev, busrange[0]); + bus = pci_find_bus(pci_domain_nr(dev->bus), busrange[0]); if (!bus) { - printk(KERN_ERR "Failed to create pci bus for %s\n", - node->full_name); - return; + bus = pci_add_new_bus(dev->bus, dev, busrange[0]); + if (!bus) { + printk(KERN_ERR "Failed to create pci bus for %s\n", + node->full_name); + return; + } } bus->primary = dev->bus->number; @@ -292,6 +295,38 @@ void of_scan_pci_bridge(struct pci_dev *dev) } EXPORT_SYMBOL(of_scan_pci_bridge); +static struct pci_dev *of_scan_pci_dev(struct pci_bus *bus, + struct device_node *dn) +{ + struct pci_dev *dev = NULL; + const u32 *reg; + int reglen, devfn; + + pr_debug(" * %s\n", dn->full_name); + if (!of_device_is_available(dn)) + return NULL; + + reg = of_get_property(dn, "reg", ®len); + if (reg == NULL || reglen < 20) + return NULL; + devfn = (reg[0] >> 8) & 0xff; + + /* Check if the PCI device is already there */ + dev = pci_get_slot(bus, devfn); + if (dev) { + pci_dev_put(dev); + return dev; + } + + /* create a new pci_dev for this device */ + dev = of_create_pci_dev(dn, bus, devfn); + if (!dev) + return NULL; + + pr_debug(" dev header type: %x\n", dev->hdr_type); + return dev; +} + /** * __of_scan_bus - given a PCI bus node, setup bus and scan for child devices * @node: device tree node for the PCI bus @@ -302,8 +337,6 @@ static void __of_scan_bus(struct device_node *node, struct pci_bus *bus, int rescan_existing) { struct device_node *child; - const u32 *reg; - int reglen, devfn; struct pci_dev *dev; pr_debug("of_scan_bus(%s) bus no %d...\n", @@ -311,16 +344,7 @@ static void __of_scan_bus(struct device_node *node, struct pci_bus *bus, /* Scan direct children */ for_each_child_of_node(node, child) { - pr_debug(" * %s\n", child->full_name); - if (!of_device_is_available(child)) - continue; - reg = of_get_property(child, "reg", ®len); - if (reg == NULL || reglen < 20) - continue; - devfn = (reg[0] >> 8) & 0xff; - - /* create a new pci_dev for this device */ - dev = of_create_pci_dev(child, bus, devfn); + dev = of_scan_pci_dev(bus, child); if (!dev) continue; pr_debug(" dev header type: %x\n", dev->hdr_type); diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c index 5eccda9fd33f..607902424e73 100644 --- a/arch/powerpc/kernel/prom_init.c +++ b/arch/powerpc/kernel/prom_init.c @@ -644,7 +644,8 @@ unsigned char ibm_architecture_vec[] = { W(0xfffe0000), W(0x003a0000), /* POWER5/POWER5+ */ W(0xffff0000), W(0x003e0000), /* POWER6 */ W(0xffff0000), W(0x003f0000), /* POWER7 */ - W(0xffff0000), W(0x004b0000), /* POWER8 */ + W(0xffff0000), W(0x004b0000), /* POWER8E */ + W(0xffff0000), W(0x004d0000), /* POWER8 */ W(0xffffffff), W(0x0f000004), /* all 2.07-compliant */ W(0xffffffff), W(0x0f000003), /* all 2.06-compliant */ W(0xffffffff), W(0x0f000002), /* all 2.05-compliant */ @@ -706,7 +707,7 @@ unsigned char ibm_architecture_vec[] = { * must match by the macro below. Update the definition if * the structure layout changes. */ -#define IBM_ARCH_VEC_NRCORES_OFFSET 117 +#define IBM_ARCH_VEC_NRCORES_OFFSET 125 W(NR_CPUS), /* number of cores supported */ 0, 0, diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S index 654e479802f2..f096e72262f4 100644 --- a/arch/powerpc/kernel/vmlinux.lds.S +++ b/arch/powerpc/kernel/vmlinux.lds.S @@ -38,9 +38,6 @@ jiffies = jiffies_64 + 4; #endif SECTIONS { - . = 0; - reloc_start = .; - . = KERNELBASE; /* diff --git a/arch/powerpc/mm/hash_native_64.c b/arch/powerpc/mm/hash_native_64.c index 3f0c30ae4791..c33d939120c9 100644 --- a/arch/powerpc/mm/hash_native_64.c +++ b/arch/powerpc/mm/hash_native_64.c @@ -43,6 +43,7 @@ static inline void __tlbie(unsigned long vpn, int psize, int apsize, int ssize) { unsigned long va; unsigned int penc; + unsigned long sllp; /* * We need 14 to 65 bits of va for a tlibe of 4K page @@ -64,7 +65,9 @@ static inline void __tlbie(unsigned long vpn, int psize, int apsize, int ssize) /* clear out bits after (52) [0....52.....63] */ va &= ~((1ul << (64 - 52)) - 1); va |= ssize << 8; - va |= mmu_psize_defs[apsize].sllp << 6; + sllp = ((mmu_psize_defs[apsize].sllp & SLB_VSID_L) >> 6) | + ((mmu_psize_defs[apsize].sllp & SLB_VSID_LP) >> 4); + va |= sllp << 5; asm volatile(ASM_FTR_IFCLR("tlbie %0,0", PPC_TLBIE(%1,%0), %2) : : "r" (va), "r"(0), "i" (CPU_FTR_ARCH_206) : "memory"); @@ -98,6 +101,7 @@ static inline void __tlbiel(unsigned long vpn, int psize, int apsize, int ssize) { unsigned long va; unsigned int penc; + unsigned long sllp; /* VPN_SHIFT can be atmost 12 */ va = vpn << VPN_SHIFT; @@ -113,7 +117,9 @@ static inline void __tlbiel(unsigned long vpn, int psize, int apsize, int ssize) /* clear out bits after(52) [0....52.....63] */ va &= ~((1ul << (64 - 52)) - 1); va |= ssize << 8; - va |= mmu_psize_defs[apsize].sllp << 6; + sllp = ((mmu_psize_defs[apsize].sllp & SLB_VSID_L) >> 6) | + ((mmu_psize_defs[apsize].sllp & SLB_VSID_LP) >> 4); + va |= sllp << 5; asm volatile(".long 0x7c000224 | (%0 << 11) | (0 << 21)" : : "r"(va) : "memory"); break; @@ -554,6 +560,7 @@ static void hpte_decode(struct hash_pte *hpte, unsigned long slot, seg_off |= vpi << shift; } *vpn = vsid << (SID_SHIFT - VPN_SHIFT) | seg_off >> VPN_SHIFT; + break; case MMU_SEGSIZE_1T: /* We only have 40 - 23 bits of seg_off in avpn */ seg_off = (avpn & 0x1ffff) << 23; @@ -563,6 +570,7 @@ static void hpte_decode(struct hash_pte *hpte, unsigned long slot, seg_off |= vpi << shift; } *vpn = vsid << (SID_SHIFT_1T - VPN_SHIFT) | seg_off >> VPN_SHIFT; + break; default: *vpn = size = 0; } diff --git a/arch/powerpc/perf/core-book3s.c b/arch/powerpc/perf/core-book3s.c index a3985aee77fe..24a45f91c65f 100644 --- a/arch/powerpc/perf/core-book3s.c +++ b/arch/powerpc/perf/core-book3s.c @@ -1252,8 +1252,11 @@ nocheck: ret = 0; out: - if (has_branch_stack(event)) + if (has_branch_stack(event)) { power_pmu_bhrb_enable(event); + cpuhw->bhrb_filter = ppmu->bhrb_filter_map( + event->attr.branch_sample_type); + } perf_pmu_enable(event->pmu); local_irq_restore(flags); diff --git a/arch/powerpc/perf/power8-pmu.c b/arch/powerpc/perf/power8-pmu.c index 96a64d6a8bdf..7466374d2787 100644 --- a/arch/powerpc/perf/power8-pmu.c +++ b/arch/powerpc/perf/power8-pmu.c @@ -561,18 +561,13 @@ static int power8_generic_events[] = { static u64 power8_bhrb_filter_map(u64 branch_sample_type) { u64 pmu_bhrb_filter = 0; - u64 br_privilege = branch_sample_type & ONLY_PLM; - /* BHRB and regular PMU events share the same prvillege state + /* BHRB and regular PMU events share the same privilege state * filter configuration. BHRB is always recorded along with a - * regular PMU event. So privilege state filter criteria for BHRB - * and the companion PMU events has to be the same. As a default - * "perf record" tool sets all privillege bits ON when no filter - * criteria is provided in the command line. So as along as all - * privillege bits are ON or they are OFF, we are good to go. + * regular PMU event. As the privilege state filter is handled + * in the basic PMC configuration of the accompanying regular + * PMU event, we ignore any separate BHRB specific request. */ - if ((br_privilege != 7) && (br_privilege != 0)) - return -1; /* No branch filter requested */ if (branch_sample_type & PERF_SAMPLE_BRANCH_ANY) @@ -621,10 +616,19 @@ static struct power_pmu power8_pmu = { static int __init init_power8_pmu(void) { + int rc; + if (!cur_cpu_spec->oprofile_cpu_type || strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/power8")) return -ENODEV; - return register_power_pmu(&power8_pmu); + rc = register_power_pmu(&power8_pmu); + if (rc) + return rc; + + /* Tell userspace that EBB is supported */ + cur_cpu_spec->cpu_user_features2 |= PPC_FEATURE2_EBB; + + return 0; } early_initcall(init_power8_pmu); diff --git a/arch/powerpc/platforms/powernv/eeh-powernv.c b/arch/powerpc/platforms/powernv/eeh-powernv.c index 969cce73055a..79663d26e6ea 100644 --- a/arch/powerpc/platforms/powernv/eeh-powernv.c +++ b/arch/powerpc/platforms/powernv/eeh-powernv.c @@ -114,7 +114,7 @@ static int powernv_eeh_dev_probe(struct pci_dev *dev, void *flag) * the root bridge. So it's not reasonable to continue * the probing. */ - if (!dn || !edev) + if (!dn || !edev || edev->pe) return 0; /* Skip for PCI-ISA bridge */ @@ -122,8 +122,19 @@ static int powernv_eeh_dev_probe(struct pci_dev *dev, void *flag) return 0; /* Initialize eeh device */ - edev->class_code = dev->class; - edev->mode = 0; + edev->class_code = dev->class; + edev->mode &= 0xFFFFFF00; + if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) + edev->mode |= EEH_DEV_BRIDGE; + if (pci_is_pcie(dev)) { + edev->pcie_cap = pci_pcie_cap(dev); + + if (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT) + edev->mode |= EEH_DEV_ROOT_PORT; + else if (pci_pcie_type(dev) == PCI_EXP_TYPE_DOWNSTREAM) + edev->mode |= EEH_DEV_DS_PORT; + } + edev->config_addr = ((dev->bus->number << 8) | dev->devfn); edev->pe_config_addr = phb->bdfn_to_pe(phb, dev->bus, dev->devfn & 0xff); diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c index 49b57b9f835d..d8140b125e62 100644 --- a/arch/powerpc/platforms/powernv/pci-ioda.c +++ b/arch/powerpc/platforms/powernv/pci-ioda.c @@ -1266,7 +1266,7 @@ void __init pnv_pci_init_ioda_phb(struct device_node *np, opal_pci_set_pe(phb_id, 0, 0, 7, 1, 1 , OPAL_MAP_PE); } -void pnv_pci_init_ioda2_phb(struct device_node *np) +void __init pnv_pci_init_ioda2_phb(struct device_node *np) { pnv_pci_init_ioda_phb(np, 0, PNV_PHB_IODA2); } diff --git a/arch/powerpc/platforms/pseries/Kconfig b/arch/powerpc/platforms/pseries/Kconfig index 1bd3399146ed..62b4f8025de0 100644 --- a/arch/powerpc/platforms/pseries/Kconfig +++ b/arch/powerpc/platforms/pseries/Kconfig @@ -19,7 +19,6 @@ config PPC_PSERIES select ZLIB_DEFLATE select PPC_DOORBELL select HAVE_CONTEXT_TRACKING - select HOTPLUG if SMP select HOTPLUG_CPU if SMP default y diff --git a/arch/powerpc/platforms/pseries/eeh_pseries.c b/arch/powerpc/platforms/pseries/eeh_pseries.c index b456b157d33d..7fbc25b1813f 100644 --- a/arch/powerpc/platforms/pseries/eeh_pseries.c +++ b/arch/powerpc/platforms/pseries/eeh_pseries.c @@ -133,6 +133,48 @@ static int pseries_eeh_init(void) return 0; } +static int pseries_eeh_cap_start(struct device_node *dn) +{ + struct pci_dn *pdn = PCI_DN(dn); + u32 status; + + if (!pdn) + return 0; + + rtas_read_config(pdn, PCI_STATUS, 2, &status); + if (!(status & PCI_STATUS_CAP_LIST)) + return 0; + + return PCI_CAPABILITY_LIST; +} + + +static int pseries_eeh_find_cap(struct device_node *dn, int cap) +{ + struct pci_dn *pdn = PCI_DN(dn); + int pos = pseries_eeh_cap_start(dn); + int cnt = 48; /* Maximal number of capabilities */ + u32 id; + + if (!pos) + return 0; + + while (cnt--) { + rtas_read_config(pdn, pos, 1, &pos); + if (pos < 0x40) + break; + pos &= ~3; + rtas_read_config(pdn, pos + PCI_CAP_LIST_ID, 1, &id); + if (id == 0xff) + break; + if (id == cap) + return pos; + pos += PCI_CAP_LIST_NEXT; + } + + return 0; +} + /** * pseries_eeh_of_probe - EEH probe on the given device * @dn: OF node @@ -146,14 +188,16 @@ static void *pseries_eeh_of_probe(struct device_node *dn, void *flag) { struct eeh_dev *edev; struct eeh_pe pe; + struct pci_dn *pdn = PCI_DN(dn); const u32 *class_code, *vendor_id, *device_id; const u32 *regs; + u32 pcie_flags; int enable = 0; int ret; /* Retrieve OF node and eeh device */ edev = of_node_to_eeh_dev(dn); - if (!of_device_is_available(dn)) + if (edev->pe || !of_device_is_available(dn)) return NULL; /* Retrieve class/vendor/device IDs */ @@ -167,9 +211,26 @@ static void *pseries_eeh_of_probe(struct device_node *dn, void *flag) if (dn->type && !strcmp(dn->type, "isa")) return NULL; - /* Update class code and mode of eeh device */ + /* + * Update class code and mode of eeh device. We need + * correctly reflects that current device is root port + * or PCIe switch downstream port. + */ edev->class_code = *class_code; - edev->mode = 0; + edev->pcie_cap = pseries_eeh_find_cap(dn, PCI_CAP_ID_EXP); + edev->mode &= 0xFFFFFF00; + if ((edev->class_code >> 8) == PCI_CLASS_BRIDGE_PCI) { + edev->mode |= EEH_DEV_BRIDGE; + if (edev->pcie_cap) { + rtas_read_config(pdn, edev->pcie_cap + PCI_EXP_FLAGS, + 2, &pcie_flags); + pcie_flags = (pcie_flags & PCI_EXP_FLAGS_TYPE) >> 4; + if (pcie_flags == PCI_EXP_TYPE_ROOT_PORT) + edev->mode |= EEH_DEV_ROOT_PORT; + else if (pcie_flags == PCI_EXP_TYPE_DOWNSTREAM) + edev->mode |= EEH_DEV_DS_PORT; + } + } /* Retrieve the device address */ regs = of_get_property(dn, "reg", NULL); diff --git a/arch/powerpc/platforms/pseries/lpar.c b/arch/powerpc/platforms/pseries/lpar.c index 02d6e21619bb..8bad880bd177 100644 --- a/arch/powerpc/platforms/pseries/lpar.c +++ b/arch/powerpc/platforms/pseries/lpar.c @@ -146,7 +146,7 @@ static long pSeries_lpar_hpte_insert(unsigned long hpte_group, flags = 0; /* Make pHyp happy */ - if ((rflags & _PAGE_NO_CACHE) & !(rflags & _PAGE_WRITETHRU)) + if ((rflags & _PAGE_NO_CACHE) && !(rflags & _PAGE_WRITETHRU)) hpte_r &= ~_PAGE_COHERENT; if (firmware_has_feature(FW_FEATURE_XCMO) && !(hpte_r & HPTE_R_N)) flags |= H_COALESCE_CAND; diff --git a/arch/powerpc/platforms/pseries/ras.c b/arch/powerpc/platforms/pseries/ras.c index 7b3cbde8c783..721c0586b284 100644 --- a/arch/powerpc/platforms/pseries/ras.c +++ b/arch/powerpc/platforms/pseries/ras.c @@ -287,6 +287,9 @@ static struct rtas_error_log *fwnmi_get_errinfo(struct pt_regs *regs) unsigned long *savep; struct rtas_error_log *h, *errhdr = NULL; + /* Mask top two bits */ + regs->gpr[3] &= ~(0x3UL << 62); + if (!VALID_FWNMI_BUFFER(regs->gpr[3])) { printk(KERN_ERR "FWNMI: corrupt r3 0x%016lx\n", regs->gpr[3]); return NULL; diff --git a/arch/x86/crypto/Makefile b/arch/x86/crypto/Makefile index 7d6ba9db1be9..6c63c358a7e6 100644 --- a/arch/x86/crypto/Makefile +++ b/arch/x86/crypto/Makefile @@ -27,7 +27,6 @@ obj-$(CONFIG_CRYPTO_SHA1_SSSE3) += sha1-ssse3.o obj-$(CONFIG_CRYPTO_CRC32_PCLMUL) += crc32-pclmul.o obj-$(CONFIG_CRYPTO_SHA256_SSSE3) += sha256-ssse3.o obj-$(CONFIG_CRYPTO_SHA512_SSSE3) += sha512-ssse3.o -obj-$(CONFIG_CRYPTO_CRCT10DIF_PCLMUL) += crct10dif-pclmul.o # These modules require assembler to support AVX. ifeq ($(avx_supported),yes) @@ -82,4 +81,3 @@ crc32c-intel-$(CONFIG_64BIT) += crc32c-pcl-intel-asm_64.o crc32-pclmul-y := crc32-pclmul_asm.o crc32-pclmul_glue.o sha256-ssse3-y := sha256-ssse3-asm.o sha256-avx-asm.o sha256-avx2-asm.o sha256_ssse3_glue.o sha512-ssse3-y := sha512-ssse3-asm.o sha512-avx-asm.o sha512-avx2-asm.o sha512_ssse3_glue.o -crct10dif-pclmul-y := crct10dif-pcl-asm_64.o crct10dif-pclmul_glue.o diff --git a/arch/x86/crypto/crct10dif-pcl-asm_64.S b/arch/x86/crypto/crct10dif-pcl-asm_64.S deleted file mode 100644 index 35e97569d05f..000000000000 --- a/arch/x86/crypto/crct10dif-pcl-asm_64.S +++ /dev/null @@ -1,643 +0,0 @@ -######################################################################## -# Implement fast CRC-T10DIF computation with SSE and PCLMULQDQ instructions -# -# Copyright (c) 2013, Intel Corporation -# -# Authors: -# Erdinc Ozturk <erdinc.ozturk@intel.com> -# Vinodh Gopal <vinodh.gopal@intel.com> -# James Guilford <james.guilford@intel.com> -# Tim Chen <tim.c.chen@linux.intel.com> -# -# This software is available to you under a choice of one of two -# licenses. You may choose to be licensed under the terms of the GNU -# General Public License (GPL) Version 2, available from the file -# COPYING in the main directory of this source tree, or the -# OpenIB.org BSD license below: -# -# Redistribution and use in source and binary forms, with or without -# modification, are permitted provided that the following conditions are -# met: -# -# * Redistributions of source code must retain the above copyright -# notice, this list of conditions and the following disclaimer. -# -# * Redistributions in binary form must reproduce the above copyright -# notice, this list of conditions and the following disclaimer in the -# documentation and/or other materials provided with the -# distribution. -# -# * Neither the name of the Intel Corporation nor the names of its -# contributors may be used to endorse or promote products derived from -# this software without specific prior written permission. -# -# -# THIS SOFTWARE IS PROVIDED BY INTEL CORPORATION ""AS IS"" AND ANY -# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR -# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL INTEL CORPORATION OR -# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, -# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, -# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR -# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF -# LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING -# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS -# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. -######################################################################## -# Function API: -# UINT16 crc_t10dif_pcl( -# UINT16 init_crc, //initial CRC value, 16 bits -# const unsigned char *buf, //buffer pointer to calculate CRC on -# UINT64 len //buffer length in bytes (64-bit data) -# ); -# -# Reference paper titled "Fast CRC Computation for Generic -# Polynomials Using PCLMULQDQ Instruction" -# URL: http://www.intel.com/content/dam/www/public/us/en/documents -# /white-papers/fast-crc-computation-generic-polynomials-pclmulqdq-paper.pdf -# -# - -#include <linux/linkage.h> - -.text - -#define arg1 %rdi -#define arg2 %rsi -#define arg3 %rdx - -#define arg1_low32 %edi - -ENTRY(crc_t10dif_pcl) -.align 16 - - # adjust the 16-bit initial_crc value, scale it to 32 bits - shl $16, arg1_low32 - - # Allocate Stack Space - mov %rsp, %rcx - sub $16*2, %rsp - # align stack to 16 byte boundary - and $~(0x10 - 1), %rsp - - # check if smaller than 256 - cmp $256, arg3 - - # for sizes less than 128, we can't fold 64B at a time... - jl _less_than_128 - - - # load the initial crc value - movd arg1_low32, %xmm10 # initial crc - - # crc value does not need to be byte-reflected, but it needs - # to be moved to the high part of the register. - # because data will be byte-reflected and will align with - # initial crc at correct place. - pslldq $12, %xmm10 - - movdqa SHUF_MASK(%rip), %xmm11 - # receive the initial 64B data, xor the initial crc value - movdqu 16*0(arg2), %xmm0 - movdqu 16*1(arg2), %xmm1 - movdqu 16*2(arg2), %xmm2 - movdqu 16*3(arg2), %xmm3 - movdqu 16*4(arg2), %xmm4 - movdqu 16*5(arg2), %xmm5 - movdqu 16*6(arg2), %xmm6 - movdqu 16*7(arg2), %xmm7 - - pshufb %xmm11, %xmm0 - # XOR the initial_crc value - pxor %xmm10, %xmm0 - pshufb %xmm11, %xmm1 - pshufb %xmm11, %xmm2 - pshufb %xmm11, %xmm3 - pshufb %xmm11, %xmm4 - pshufb %xmm11, %xmm5 - pshufb %xmm11, %xmm6 - pshufb %xmm11, %xmm7 - - movdqa rk3(%rip), %xmm10 #xmm10 has rk3 and rk4 - #imm value of pclmulqdq instruction - #will determine which constant to use - - ################################################################# - # we subtract 256 instead of 128 to save one instruction from the loop - sub $256, arg3 - - # at this section of the code, there is 64*x+y (0<=y<64) bytes of - # buffer. The _fold_64_B_loop will fold 64B at a time - # until we have 64+y Bytes of buffer - - - # fold 64B at a time. This section of the code folds 4 xmm - # registers in parallel -_fold_64_B_loop: - - # update the buffer pointer - add $128, arg2 # buf += 64# - - movdqu 16*0(arg2), %xmm9 - movdqu 16*1(arg2), %xmm12 - pshufb %xmm11, %xmm9 - pshufb %xmm11, %xmm12 - movdqa %xmm0, %xmm8 - movdqa %xmm1, %xmm13 - pclmulqdq $0x0 , %xmm10, %xmm0 - pclmulqdq $0x11, %xmm10, %xmm8 - pclmulqdq $0x0 , %xmm10, %xmm1 - pclmulqdq $0x11, %xmm10, %xmm13 - pxor %xmm9 , %xmm0 - xorps %xmm8 , %xmm0 - pxor %xmm12, %xmm1 - xorps %xmm13, %xmm1 - - movdqu 16*2(arg2), %xmm9 - movdqu 16*3(arg2), %xmm12 - pshufb %xmm11, %xmm9 - pshufb %xmm11, %xmm12 - movdqa %xmm2, %xmm8 - movdqa %xmm3, %xmm13 - pclmulqdq $0x0, %xmm10, %xmm2 - pclmulqdq $0x11, %xmm10, %xmm8 - pclmulqdq $0x0, %xmm10, %xmm3 - pclmulqdq $0x11, %xmm10, %xmm13 - pxor %xmm9 , %xmm2 - xorps %xmm8 , %xmm2 - pxor %xmm12, %xmm3 - xorps %xmm13, %xmm3 - - movdqu 16*4(arg2), %xmm9 - movdqu 16*5(arg2), %xmm12 - pshufb %xmm11, %xmm9 - pshufb %xmm11, %xmm12 - movdqa %xmm4, %xmm8 - movdqa %xmm5, %xmm13 - pclmulqdq $0x0, %xmm10, %xmm4 - pclmulqdq $0x11, %xmm10, %xmm8 - pclmulqdq $0x0, %xmm10, %xmm5 - pclmulqdq $0x11, %xmm10, %xmm13 - pxor %xmm9 , %xmm4 - xorps %xmm8 , %xmm4 - pxor %xmm12, %xmm5 - xorps %xmm13, %xmm5 - - movdqu 16*6(arg2), %xmm9 - movdqu 16*7(arg2), %xmm12 - pshufb %xmm11, %xmm9 - pshufb %xmm11, %xmm12 - movdqa %xmm6 , %xmm8 - movdqa %xmm7 , %xmm13 - pclmulqdq $0x0 , %xmm10, %xmm6 - pclmulqdq $0x11, %xmm10, %xmm8 - pclmulqdq $0x0 , %xmm10, %xmm7 - pclmulqdq $0x11, %xmm10, %xmm13 - pxor %xmm9 , %xmm6 - xorps %xmm8 , %xmm6 - pxor %xmm12, %xmm7 - xorps %xmm13, %xmm7 - - sub $128, arg3 - - # check if there is another 64B in the buffer to be able to fold - jge _fold_64_B_loop - ################################################################## - - - add $128, arg2 - # at this point, the buffer pointer is pointing at the last y Bytes - # of the buffer the 64B of folded data is in 4 of the xmm - # registers: xmm0, xmm1, xmm2, xmm3 - - - # fold the 8 xmm registers to 1 xmm register with different constants - - movdqa rk9(%rip), %xmm10 - movdqa %xmm0, %xmm8 - pclmulqdq $0x11, %xmm10, %xmm0 - pclmulqdq $0x0 , %xmm10, %xmm8 - pxor %xmm8, %xmm7 - xorps %xmm0, %xmm7 - - movdqa rk11(%rip), %xmm10 - movdqa %xmm1, %xmm8 - pclmulqdq $0x11, %xmm10, %xmm1 - pclmulqdq $0x0 , %xmm10, %xmm8 - pxor %xmm8, %xmm7 - xorps %xmm1, %xmm7 - - movdqa rk13(%rip), %xmm10 - movdqa %xmm2, %xmm8 - pclmulqdq $0x11, %xmm10, %xmm2 - pclmulqdq $0x0 , %xmm10, %xmm8 - pxor %xmm8, %xmm7 - pxor %xmm2, %xmm7 - - movdqa rk15(%rip), %xmm10 - movdqa %xmm3, %xmm8 - pclmulqdq $0x11, %xmm10, %xmm3 - pclmulqdq $0x0 , %xmm10, %xmm8 - pxor %xmm8, %xmm7 - xorps %xmm3, %xmm7 - - movdqa rk17(%rip), %xmm10 - movdqa %xmm4, %xmm8 - pclmulqdq $0x11, %xmm10, %xmm4 - pclmulqdq $0x0 , %xmm10, %xmm8 - pxor %xmm8, %xmm7 - pxor %xmm4, %xmm7 - - movdqa rk19(%rip), %xmm10 - movdqa %xmm5, %xmm8 - pclmulqdq $0x11, %xmm10, %xmm5 - pclmulqdq $0x0 , %xmm10, %xmm8 - pxor %xmm8, %xmm7 - xorps %xmm5, %xmm7 - - movdqa rk1(%rip), %xmm10 #xmm10 has rk1 and rk2 - #imm value of pclmulqdq instruction - #will determine which constant to use - movdqa %xmm6, %xmm8 - pclmulqdq $0x11, %xmm10, %xmm6 - pclmulqdq $0x0 , %xmm10, %xmm8 - pxor %xmm8, %xmm7 - pxor %xmm6, %xmm7 - - - # instead of 64, we add 48 to the loop counter to save 1 instruction - # from the loop instead of a cmp instruction, we use the negative - # flag with the jl instruction - add $128-16, arg3 - jl _final_reduction_for_128 - - # now we have 16+y bytes left to reduce. 16 Bytes is in register xmm7 - # and the rest is in memory. We can fold 16 bytes at a time if y>=16 - # continue folding 16B at a time - -_16B_reduction_loop: - movdqa %xmm7, %xmm8 - pclmulqdq $0x11, %xmm10, %xmm7 - pclmulqdq $0x0 , %xmm10, %xmm8 - pxor %xmm8, %xmm7 - movdqu (arg2), %xmm0 - pshufb %xmm11, %xmm0 - pxor %xmm0 , %xmm7 - add $16, arg2 - sub $16, arg3 - # instead of a cmp instruction, we utilize the flags with the - # jge instruction equivalent of: cmp arg3, 16-16 - # check if there is any more 16B in the buffer to be able to fold - jge _16B_reduction_loop - - #now we have 16+z bytes left to reduce, where 0<= z < 16. - #first, we reduce the data in the xmm7 register - - -_final_reduction_for_128: - # check if any more data to fold. If not, compute the CRC of - # the final 128 bits - add $16, arg3 - je _128_done - - # here we are getting data that is less than 16 bytes. - # since we know that there was data before the pointer, we can - # offset the input pointer before the actual point, to receive - # exactly 16 bytes. after that the registers need to be adjusted. -_get_last_two_xmms: - movdqa %xmm7, %xmm2 - - movdqu -16(arg2, arg3), %xmm1 - pshufb %xmm11, %xmm1 - - # get rid of the extra data that was loaded before - # load the shift constant - lea pshufb_shf_table+16(%rip), %rax - sub arg3, %rax - movdqu (%rax), %xmm0 - - # shift xmm2 to the left by arg3 bytes - pshufb %xmm0, %xmm2 - - # shift xmm7 to the right by 16-arg3 bytes - pxor mask1(%rip), %xmm0 - pshufb %xmm0, %xmm7 - pblendvb %xmm2, %xmm1 #xmm0 is implicit - - # fold 16 Bytes - movdqa %xmm1, %xmm2 - movdqa %xmm7, %xmm8 - pclmulqdq $0x11, %xmm10, %xmm7 - pclmulqdq $0x0 , %xmm10, %xmm8 - pxor %xmm8, %xmm7 - pxor %xmm2, %xmm7 - -_128_done: - # compute crc of a 128-bit value - movdqa rk5(%rip), %xmm10 # rk5 and rk6 in xmm10 - movdqa %xmm7, %xmm0 - - #64b fold - pclmulqdq $0x1, %xmm10, %xmm7 - pslldq $8 , %xmm0 - pxor %xmm0, %xmm7 - - #32b fold - movdqa %xmm7, %xmm0 - - pand mask2(%rip), %xmm0 - - psrldq $12, %xmm7 - pclmulqdq $0x10, %xmm10, %xmm7 - pxor %xmm0, %xmm7 - - #barrett reduction -_barrett: - movdqa rk7(%rip), %xmm10 # rk7 and rk8 in xmm10 - movdqa %xmm7, %xmm0 - pclmulqdq $0x01, %xmm10, %xmm7 - pslldq $4, %xmm7 - pclmulqdq $0x11, %xmm10, %xmm7 - - pslldq $4, %xmm7 - pxor %xmm0, %xmm7 - pextrd $1, %xmm7, %eax - -_cleanup: - # scale the result back to 16 bits - shr $16, %eax - mov %rcx, %rsp - ret - -######################################################################## - -.align 16 -_less_than_128: - - # check if there is enough buffer to be able to fold 16B at a time - cmp $32, arg3 - jl _less_than_32 - movdqa SHUF_MASK(%rip), %xmm11 - - # now if there is, load the constants - movdqa rk1(%rip), %xmm10 # rk1 and rk2 in xmm10 - - movd arg1_low32, %xmm0 # get the initial crc value - pslldq $12, %xmm0 # align it to its correct place - movdqu (arg2), %xmm7 # load the plaintext - pshufb %xmm11, %xmm7 # byte-reflect the plaintext - pxor %xmm0, %xmm7 - - - # update the buffer pointer - add $16, arg2 - - # update the counter. subtract 32 instead of 16 to save one - # instruction from the loop - sub $32, arg3 - - jmp _16B_reduction_loop - - -.align 16 -_less_than_32: - # mov initial crc to the return value. this is necessary for - # zero-length buffers. - mov arg1_low32, %eax - test arg3, arg3 - je _cleanup - - movdqa SHUF_MASK(%rip), %xmm11 - - movd arg1_low32, %xmm0 # get the initial crc value - pslldq $12, %xmm0 # align it to its correct place - - cmp $16, arg3 - je _exact_16_left - jl _less_than_16_left - - movdqu (arg2), %xmm7 # load the plaintext - pshufb %xmm11, %xmm7 # byte-reflect the plaintext - pxor %xmm0 , %xmm7 # xor the initial crc value - add $16, arg2 - sub $16, arg3 - movdqa rk1(%rip), %xmm10 # rk1 and rk2 in xmm10 - jmp _get_last_two_xmms - - -.align 16 -_less_than_16_left: - # use stack space to load data less than 16 bytes, zero-out - # the 16B in memory first. - - pxor %xmm1, %xmm1 - mov %rsp, %r11 - movdqa %xmm1, (%r11) - - cmp $4, arg3 - jl _only_less_than_4 - - # backup the counter value - mov arg3, %r9 - cmp $8, arg3 - jl _less_than_8_left - - # load 8 Bytes - mov (arg2), %rax - mov %rax, (%r11) - add $8, %r11 - sub $8, arg3 - add $8, arg2 -_less_than_8_left: - - cmp $4, arg3 - jl _less_than_4_left - - # load 4 Bytes - mov (arg2), %eax - mov %eax, (%r11) - add $4, %r11 - sub $4, arg3 - add $4, arg2 -_less_than_4_left: - - cmp $2, arg3 - jl _less_than_2_left - - # load 2 Bytes - mov (arg2), %ax - mov %ax, (%r11) - add $2, %r11 - sub $2, arg3 - add $2, arg2 -_less_than_2_left: - cmp $1, arg3 - jl _zero_left - - # load 1 Byte - mov (arg2), %al - mov %al, (%r11) -_zero_left: - movdqa (%rsp), %xmm7 - pshufb %xmm11, %xmm7 - pxor %xmm0 , %xmm7 # xor the initial crc value - - # shl r9, 4 - lea pshufb_shf_table+16(%rip), %rax - sub %r9, %rax - movdqu (%rax), %xmm0 - pxor mask1(%rip), %xmm0 - - pshufb %xmm0, %xmm7 - jmp _128_done - -.align 16 -_exact_16_left: - movdqu (arg2), %xmm7 - pshufb %xmm11, %xmm7 - pxor %xmm0 , %xmm7 # xor the initial crc value - - jmp _128_done - -_only_less_than_4: - cmp $3, arg3 - jl _only_less_than_3 - - # load 3 Bytes - mov (arg2), %al - mov %al, (%r11) - - mov 1(arg2), %al - mov %al, 1(%r11) - - mov 2(arg2), %al - mov %al, 2(%r11) - - movdqa (%rsp), %xmm7 - pshufb %xmm11, %xmm7 - pxor %xmm0 , %xmm7 # xor the initial crc value - - psrldq $5, %xmm7 - - jmp _barrett -_only_less_than_3: - cmp $2, arg3 - jl _only_less_than_2 - - # load 2 Bytes - mov (arg2), %al - mov %al, (%r11) - - mov 1(arg2), %al - mov %al, 1(%r11) - - movdqa (%rsp), %xmm7 - pshufb %xmm11, %xmm7 - pxor %xmm0 , %xmm7 # xor the initial crc value - - psrldq $6, %xmm7 - - jmp _barrett -_only_less_than_2: - - # load 1 Byte - mov (arg2), %al - mov %al, (%r11) - - movdqa (%rsp), %xmm7 - pshufb %xmm11, %xmm7 - pxor %xmm0 , %xmm7 # xor the initial crc value - - psrldq $7, %xmm7 - - jmp _barrett - -ENDPROC(crc_t10dif_pcl) - -.data - -# precomputed constants -# these constants are precomputed from the poly: -# 0x8bb70000 (0x8bb7 scaled to 32 bits) -.align 16 -# Q = 0x18BB70000 -# rk1 = 2^(32*3) mod Q << 32 -# rk2 = 2^(32*5) mod Q << 32 -# rk3 = 2^(32*15) mod Q << 32 -# rk4 = 2^(32*17) mod Q << 32 -# rk5 = 2^(32*3) mod Q << 32 -# rk6 = 2^(32*2) mod Q << 32 -# rk7 = floor(2^64/Q) -# rk8 = Q -rk1: -.quad 0x2d56000000000000 -rk2: -.quad 0x06df000000000000 -rk3: -.quad 0x9d9d000000000000 -rk4: -.quad 0x7cf5000000000000 -rk5: -.quad 0x2d56000000000000 -rk6: -.quad 0x1368000000000000 -rk7: -.quad 0x00000001f65a57f8 -rk8: -.quad 0x000000018bb70000 - -rk9: -.quad 0xceae000000000000 -rk10: -.quad 0xbfd6000000000000 -rk11: -.quad 0x1e16000000000000 -rk12: -.quad 0x713c000000000000 -rk13: -.quad 0xf7f9000000000000 -rk14: -.quad 0x80a6000000000000 -rk15: -.quad 0x044c000000000000 -rk16: -.quad 0xe658000000000000 -rk17: -.quad 0xad18000000000000 -rk18: -.quad 0xa497000000000000 -rk19: -.quad 0x6ee3000000000000 -rk20: -.quad 0xe7b5000000000000 - - - -mask1: -.octa 0x80808080808080808080808080808080 -mask2: -.octa 0x00000000FFFFFFFFFFFFFFFFFFFFFFFF - -SHUF_MASK: -.octa 0x000102030405060708090A0B0C0D0E0F - -pshufb_shf_table: -# use these values for shift constants for the pshufb instruction -# different alignments result in values as shown: -# DDQ 0x008f8e8d8c8b8a898887868584838281 # shl 15 (16-1) / shr1 -# DDQ 0x01008f8e8d8c8b8a8988878685848382 # shl 14 (16-3) / shr2 -# DDQ 0x0201008f8e8d8c8b8a89888786858483 # shl 13 (16-4) / shr3 -# DDQ 0x030201008f8e8d8c8b8a898887868584 # shl 12 (16-4) / shr4 -# DDQ 0x04030201008f8e8d8c8b8a8988878685 # shl 11 (16-5) / shr5 -# DDQ 0x0504030201008f8e8d8c8b8a89888786 # shl 10 (16-6) / shr6 -# DDQ 0x060504030201008f8e8d8c8b8a898887 # shl 9 (16-7) / shr7 -# DDQ 0x07060504030201008f8e8d8c8b8a8988 # shl 8 (16-8) / shr8 -# DDQ 0x0807060504030201008f8e8d8c8b8a89 # shl 7 (16-9) / shr9 -# DDQ 0x090807060504030201008f8e8d8c8b8a # shl 6 (16-10) / shr10 -# DDQ 0x0a090807060504030201008f8e8d8c8b # shl 5 (16-11) / shr11 -# DDQ 0x0b0a090807060504030201008f8e8d8c # shl 4 (16-12) / shr12 -# DDQ 0x0c0b0a090807060504030201008f8e8d # shl 3 (16-13) / shr13 -# DDQ 0x0d0c0b0a090807060504030201008f8e # shl 2 (16-14) / shr14 -# DDQ 0x0e0d0c0b0a090807060504030201008f # shl 1 (16-15) / shr15 -.octa 0x8f8e8d8c8b8a89888786858483828100 -.octa 0x000e0d0c0b0a09080706050403020100 diff --git a/arch/x86/crypto/crct10dif-pclmul_glue.c b/arch/x86/crypto/crct10dif-pclmul_glue.c deleted file mode 100644 index 7845d7fd54c0..000000000000 --- a/arch/x86/crypto/crct10dif-pclmul_glue.c +++ /dev/null @@ -1,151 +0,0 @@ -/* - * Cryptographic API. - * - * T10 Data Integrity Field CRC16 Crypto Transform using PCLMULQDQ Instructions - * - * Copyright (C) 2013 Intel Corporation - * Author: Tim Chen <tim.c.chen@linux.intel.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. - * - * 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 - * NONINFRINGEMENT. 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. - * - */ - -#include <linux/types.h> -#include <linux/module.h> -#include <linux/crc-t10dif.h> -#include <crypto/internal/hash.h> -#include <linux/init.h> -#include <linux/string.h> -#include <linux/kernel.h> -#include <asm/i387.h> -#include <asm/cpufeature.h> -#include <asm/cpu_device_id.h> - -asmlinkage __u16 crc_t10dif_pcl(__u16 crc, const unsigned char *buf, - size_t len); - -struct chksum_desc_ctx { - __u16 crc; -}; - -/* - * Steps through buffer one byte at at time, calculates reflected - * crc using table. - */ - -static int chksum_init(struct shash_desc *desc) -{ - struct chksum_desc_ctx *ctx = shash_desc_ctx(desc); - - ctx->crc = 0; - - return 0; -} - -static int chksum_update(struct shash_desc *desc, const u8 *data, - unsigned int length) -{ - struct chksum_desc_ctx *ctx = shash_desc_ctx(desc); - - if (irq_fpu_usable()) { - kernel_fpu_begin(); - ctx->crc = crc_t10dif_pcl(ctx->crc, data, length); - kernel_fpu_end(); - } else - ctx->crc = crc_t10dif_generic(ctx->crc, data, length); - return 0; -} - -static int chksum_final(struct shash_desc *desc, u8 *out) -{ - struct chksum_desc_ctx *ctx = shash_desc_ctx(desc); - - *(__u16 *)out = ctx->crc; - return 0; -} - -static int __chksum_finup(__u16 *crcp, const u8 *data, unsigned int len, - u8 *out) -{ - if (irq_fpu_usable()) { - kernel_fpu_begin(); - *(__u16 *)out = crc_t10dif_pcl(*crcp, data, len); - kernel_fpu_end(); - } else - *(__u16 *)out = crc_t10dif_generic(*crcp, data, len); - return 0; -} - -static int chksum_finup(struct shash_desc *desc, const u8 *data, - unsigned int len, u8 *out) -{ - struct chksum_desc_ctx *ctx = shash_desc_ctx(desc); - - return __chksum_finup(&ctx->crc, data, len, out); -} - -static int chksum_digest(struct shash_desc *desc, const u8 *data, - unsigned int length, u8 *out) -{ - struct chksum_desc_ctx *ctx = shash_desc_ctx(desc); - - return __chksum_finup(&ctx->crc, data, length, out); -} - -static struct shash_alg alg = { - .digestsize = CRC_T10DIF_DIGEST_SIZE, - .init = chksum_init, - .update = chksum_update, - .final = chksum_final, - .finup = chksum_finup, - .digest = chksum_digest, - .descsize = sizeof(struct chksum_desc_ctx), - .base = { - .cra_name = "crct10dif", - .cra_driver_name = "crct10dif-pclmul", - .cra_priority = 200, - .cra_blocksize = CRC_T10DIF_BLOCK_SIZE, - .cra_module = THIS_MODULE, - } -}; - -static const struct x86_cpu_id crct10dif_cpu_id[] = { - X86_FEATURE_MATCH(X86_FEATURE_PCLMULQDQ), - {} -}; -MODULE_DEVICE_TABLE(x86cpu, crct10dif_cpu_id); - -static int __init crct10dif_intel_mod_init(void) -{ - if (!x86_match_cpu(crct10dif_cpu_id)) - return -ENODEV; - - return crypto_register_shash(&alg); -} - -static void __exit crct10dif_intel_mod_fini(void) -{ - crypto_unregister_shash(&alg); -} - -module_init(crct10dif_intel_mod_init); -module_exit(crct10dif_intel_mod_fini); - -MODULE_AUTHOR("Tim Chen <tim.c.chen@linux.intel.com>"); -MODULE_DESCRIPTION("T10 DIF CRC calculation accelerated with PCLMULQDQ."); -MODULE_LICENSE("GPL"); - -MODULE_ALIAS("crct10dif"); -MODULE_ALIAS("crct10dif-pclmul"); diff --git a/crypto/Kconfig b/crypto/Kconfig index 69ce573f1224..aca01164f002 100644 --- a/crypto/Kconfig +++ b/crypto/Kconfig @@ -376,25 +376,6 @@ config CRYPTO_CRC32_PCLMUL which will enable any routine to use the CRC-32-IEEE 802.3 checksum and gain better performance as compared with the table implementation. -config CRYPTO_CRCT10DIF - tristate "CRCT10DIF algorithm" - select CRYPTO_HASH - help - CRC T10 Data Integrity Field computation is being cast as - a crypto transform. This allows for faster crc t10 diff - transforms to be used if they are available. - -config CRYPTO_CRCT10DIF_PCLMUL - tristate "CRCT10DIF PCLMULQDQ hardware acceleration" - depends on X86 && 64BIT && CRC_T10DIF - select CRYPTO_HASH - help - For x86_64 processors with SSE4.2 and PCLMULQDQ supported, - CRC T10 DIF PCLMULQDQ computation can be hardware - accelerated PCLMULQDQ instruction. This option will create - 'crct10dif-plcmul' module, which is faster when computing the - crct10dif checksum as compared with the generic table implementation. - config CRYPTO_GHASH tristate "GHASH digest algorithm" select CRYPTO_GF128MUL diff --git a/crypto/Makefile b/crypto/Makefile index 2d5ed08a239f..2ba0df2f908f 100644 --- a/crypto/Makefile +++ b/crypto/Makefile @@ -83,7 +83,6 @@ obj-$(CONFIG_CRYPTO_ZLIB) += zlib.o obj-$(CONFIG_CRYPTO_MICHAEL_MIC) += michael_mic.o obj-$(CONFIG_CRYPTO_CRC32C) += crc32c.o obj-$(CONFIG_CRYPTO_CRC32) += crc32.o -obj-$(CONFIG_CRYPTO_CRCT10DIF) += crct10dif.o obj-$(CONFIG_CRYPTO_AUTHENC) += authenc.o authencesn.o obj-$(CONFIG_CRYPTO_LZO) += lzo.o obj-$(CONFIG_CRYPTO_LZ4) += lz4.o diff --git a/crypto/crct10dif.c b/crypto/crct10dif.c deleted file mode 100644 index 92aca96d6b98..000000000000 --- a/crypto/crct10dif.c +++ /dev/null @@ -1,178 +0,0 @@ -/* - * Cryptographic API. - * - * T10 Data Integrity Field CRC16 Crypto Transform - * - * Copyright (c) 2007 Oracle Corporation. All rights reserved. - * Written by Martin K. Petersen <martin.petersen@oracle.com> - * Copyright (C) 2013 Intel Corporation - * Author: Tim Chen <tim.c.chen@linux.intel.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. - * - * 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 - * NONINFRINGEMENT. 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. - * - */ - -#include <linux/types.h> -#include <linux/module.h> -#include <linux/crc-t10dif.h> -#include <crypto/internal/hash.h> -#include <linux/init.h> -#include <linux/string.h> -#include <linux/kernel.h> - -struct chksum_desc_ctx { - __u16 crc; -}; - -/* Table generated using the following polynomium: - * x^16 + x^15 + x^11 + x^9 + x^8 + x^7 + x^5 + x^4 + x^2 + x + 1 - * gt: 0x8bb7 - */ -static const __u16 t10_dif_crc_table[256] = { - 0x0000, 0x8BB7, 0x9CD9, 0x176E, 0xB205, 0x39B2, 0x2EDC, 0xA56B, - 0xEFBD, 0x640A, 0x7364, 0xF8D3, 0x5DB8, 0xD60F, 0xC161, 0x4AD6, - 0x54CD, 0xDF7A, 0xC814, 0x43A3, 0xE6C8, 0x6D7F, 0x7A11, 0xF1A6, - 0xBB70, 0x30C7, 0x27A9, 0xAC1E, 0x0975, 0x82C2, 0x95AC, 0x1E1B, - 0xA99A, 0x222D, 0x3543, 0xBEF4, 0x1B9F, 0x9028, 0x8746, 0x0CF1, - 0x4627, 0xCD90, 0xDAFE, 0x5149, 0xF422, 0x7F95, 0x68FB, 0xE34C, - 0xFD57, 0x76E0, 0x618E, 0xEA39, 0x4F52, 0xC4E5, 0xD38B, 0x583C, - 0x12EA, 0x995D, 0x8E33, 0x0584, 0xA0EF, 0x2B58, 0x3C36, 0xB781, - 0xD883, 0x5334, 0x445A, 0xCFED, 0x6A86, 0xE131, 0xF65F, 0x7DE8, - 0x373E, 0xBC89, 0xABE7, 0x2050, 0x853B, 0x0E8C, 0x19E2, 0x9255, - 0x8C4E, 0x07F9, 0x1097, 0x9B20, 0x3E4B, 0xB5FC, 0xA292, 0x2925, - 0x63F3, 0xE844, 0xFF2A, 0x749D, 0xD1F6, 0x5A41, 0x4D2F, 0xC698, - 0x7119, 0xFAAE, 0xEDC0, 0x6677, 0xC31C, 0x48AB, 0x5FC5, 0xD472, - 0x9EA4, 0x1513, 0x027D, 0x89CA, 0x2CA1, 0xA716, 0xB078, 0x3BCF, - 0x25D4, 0xAE63, 0xB90D, 0x32BA, 0x97D1, 0x1C66, 0x0B08, 0x80BF, - 0xCA69, 0x41DE, 0x56B0, 0xDD07, 0x786C, 0xF3DB, 0xE4B5, 0x6F02, - 0x3AB1, 0xB106, 0xA668, 0x2DDF, 0x88B4, 0x0303, 0x146D, 0x9FDA, - 0xD50C, 0x5EBB, 0x49D5, 0xC262, 0x6709, 0xECBE, 0xFBD0, 0x7067, - 0x6E7C, 0xE5CB, 0xF2A5, 0x7912, 0xDC79, 0x57CE, 0x40A0, 0xCB17, - 0x81C1, 0x0A76, 0x1D18, 0x96AF, 0x33C4, 0xB873, 0xAF1D, 0x24AA, - 0x932B, 0x189C, 0x0FF2, 0x8445, 0x212E, 0xAA99, 0xBDF7, 0x3640, - 0x7C96, 0xF721, 0xE04F, 0x6BF8, 0xCE93, 0x4524, 0x524A, 0xD9FD, - 0xC7E6, 0x4C51, 0x5B3F, 0xD088, 0x75E3, 0xFE54, 0xE93A, 0x628D, - 0x285B, 0xA3EC, 0xB482, 0x3F35, 0x9A5E, 0x11E9, 0x0687, 0x8D30, - 0xE232, 0x6985, 0x7EEB, 0xF55C, 0x5037, 0xDB80, 0xCCEE, 0x4759, - 0x0D8F, 0x8638, 0x9156, 0x1AE1, 0xBF8A, 0x343D, 0x2353, 0xA8E4, - 0xB6FF, 0x3D48, 0x2A26, 0xA191, 0x04FA, 0x8F4D, 0x9823, 0x1394, - 0x5942, 0xD2F5, 0xC59B, 0x4E2C, 0xEB47, 0x60F0, 0x779E, 0xFC29, - 0x4BA8, 0xC01F, 0xD771, 0x5CC6, 0xF9AD, 0x721A, 0x6574, 0xEEC3, - 0xA415, 0x2FA2, 0x38CC, 0xB37B, 0x1610, 0x9DA7, 0x8AC9, 0x017E, - 0x1F65, 0x94D2, 0x83BC, 0x080B, 0xAD60, 0x26D7, 0x31B9, 0xBA0E, - 0xF0D8, 0x7B6F, 0x6C01, 0xE7B6, 0x42DD, 0xC96A, 0xDE04, 0x55B3 -}; - -__u16 crc_t10dif_generic(__u16 crc, const unsigned char *buffer, size_t len) -{ - unsigned int i; - - for (i = 0 ; i < len ; i++) - crc = (crc << 8) ^ t10_dif_crc_table[((crc >> 8) ^ buffer[i]) & 0xff]; - - return crc; -} -EXPORT_SYMBOL(crc_t10dif_generic); - -/* - * Steps through buffer one byte at at time, calculates reflected - * crc using table. - */ - -static int chksum_init(struct shash_desc *desc) -{ - struct chksum_desc_ctx *ctx = shash_desc_ctx(desc); - - ctx->crc = 0; - - return 0; -} - -static int chksum_update(struct shash_desc *desc, const u8 *data, - unsigned int length) -{ - struct chksum_desc_ctx *ctx = shash_desc_ctx(desc); - - ctx->crc = crc_t10dif_generic(ctx->crc, data, length); - return 0; -} - -static int chksum_final(struct shash_desc *desc, u8 *out) -{ - struct chksum_desc_ctx *ctx = shash_desc_ctx(desc); - - *(__u16 *)out = ctx->crc; - return 0; -} - -static int __chksum_finup(__u16 *crcp, const u8 *data, unsigned int len, - u8 *out) -{ - *(__u16 *)out = crc_t10dif_generic(*crcp, data, len); - return 0; -} - -static int chksum_finup(struct shash_desc *desc, const u8 *data, - unsigned int len, u8 *out) -{ - struct chksum_desc_ctx *ctx = shash_desc_ctx(desc); - - return __chksum_finup(&ctx->crc, data, len, out); -} - -static int chksum_digest(struct shash_desc *desc, const u8 *data, - unsigned int length, u8 *out) -{ - struct chksum_desc_ctx *ctx = shash_desc_ctx(desc); - - return __chksum_finup(&ctx->crc, data, length, out); -} - -static struct shash_alg alg = { - .digestsize = CRC_T10DIF_DIGEST_SIZE, - .init = chksum_init, - .update = chksum_update, - .final = chksum_final, - .finup = chksum_finup, - .digest = chksum_digest, - .descsize = sizeof(struct chksum_desc_ctx), - .base = { - .cra_name = "crct10dif", - .cra_driver_name = "crct10dif-generic", - .cra_priority = 100, - .cra_blocksize = CRC_T10DIF_BLOCK_SIZE, - .cra_module = THIS_MODULE, - } -}; - -static int __init crct10dif_mod_init(void) -{ - int ret; - - ret = crypto_register_shash(&alg); - return ret; -} - -static void __exit crct10dif_mod_fini(void) -{ - crypto_unregister_shash(&alg); -} - -module_init(crct10dif_mod_init); -module_exit(crct10dif_mod_fini); - -MODULE_AUTHOR("Tim Chen <tim.c.chen@linux.intel.com>"); -MODULE_DESCRIPTION("T10 DIF CRC calculation."); -MODULE_LICENSE("GPL"); diff --git a/crypto/tcrypt.c b/crypto/tcrypt.c index 25a5934f0e50..66d254ce0d11 100644 --- a/crypto/tcrypt.c +++ b/crypto/tcrypt.c @@ -1174,10 +1174,6 @@ static int do_test(int m) ret += tcrypt_test("ghash"); break; - case 47: - ret += tcrypt_test("crct10dif"); - break; - case 100: ret += tcrypt_test("hmac(md5)"); break; @@ -1502,10 +1498,6 @@ static int do_test(int m) test_hash_speed("crc32c", sec, generic_hash_speed_template); if (mode > 300 && mode < 400) break; - case 320: - test_hash_speed("crct10dif", sec, generic_hash_speed_template); - if (mode > 300 && mode < 400) break; - case 399: break; diff --git a/crypto/testmgr.c b/crypto/testmgr.c index 2f00607039e2..ecddf921a9db 100644 --- a/crypto/testmgr.c +++ b/crypto/testmgr.c @@ -2046,16 +2046,6 @@ static const struct alg_test_desc alg_test_descs[] = { } } }, { - .alg = "crct10dif", - .test = alg_test_hash, - .fips_allowed = 1, - .suite = { - .hash = { - .vecs = crct10dif_tv_template, - .count = CRCT10DIF_TEST_VECTORS - } - } - }, { .alg = "cryptd(__driver-cbc-aes-aesni)", .test = alg_test_null, .fips_allowed = 1, diff --git a/crypto/testmgr.h b/crypto/testmgr.h index 7d44aa3d6b44..1e701bc075b9 100644 --- a/crypto/testmgr.h +++ b/crypto/testmgr.h @@ -450,39 +450,6 @@ static struct hash_testvec rmd320_tv_template[] = { } }; -#define CRCT10DIF_TEST_VECTORS 3 -static struct hash_testvec crct10dif_tv_template[] = { - { - .plaintext = "abc", - .psize = 3, -#ifdef __LITTLE_ENDIAN - .digest = "\x3b\x44", -#else - .digest = "\x44\x3b", -#endif - }, { - .plaintext = "1234567890123456789012345678901234567890" - "123456789012345678901234567890123456789", - .psize = 79, -#ifdef __LITTLE_ENDIAN - .digest = "\x70\x4b", -#else - .digest = "\x4b\x70", -#endif - }, { - .plaintext = - "abcddddddddddddddddddddddddddddddddddddddddddddddddddddd", - .psize = 56, -#ifdef __LITTLE_ENDIAN - .digest = "\xe3\x9c", -#else - .digest = "\x9c\xe3", -#endif - .np = 2, - .tap = { 28, 28 } - } -}; - /* * SHA1 test vectors from from FIPS PUB 180-1 * Long vector from CAVS 5.0 diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig index 80dc988f01e4..4e737728aee2 100644 --- a/drivers/ata/Kconfig +++ b/drivers/ata/Kconfig @@ -97,6 +97,15 @@ config SATA_AHCI_PLATFORM If unsure, say N. +config AHCI_IMX + tristate "Freescale i.MX AHCI SATA support" + depends on SATA_AHCI_PLATFORM && MFD_SYSCON + help + This option enables support for the Freescale i.MX SoC's + onboard AHCI SATA. + + If unsure, say N. + config SATA_FSL tristate "Freescale 3.0Gbps SATA support" depends on FSL_SOC @@ -107,7 +116,7 @@ config SATA_FSL If unsure, say N. config SATA_INIC162X - tristate "Initio 162x SATA support" + tristate "Initio 162x SATA support (Very Experimental)" depends on PCI help This option enables support for Initio 162x Serial ATA. diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile index c04d0fd038a3..46518c622460 100644 --- a/drivers/ata/Makefile +++ b/drivers/ata/Makefile @@ -10,6 +10,7 @@ obj-$(CONFIG_SATA_INIC162X) += sata_inic162x.o obj-$(CONFIG_SATA_SIL24) += sata_sil24.o obj-$(CONFIG_SATA_DWC) += sata_dwc_460ex.o obj-$(CONFIG_SATA_HIGHBANK) += sata_highbank.o libahci.o +obj-$(CONFIG_AHCI_IMX) += ahci_imx.o # SFF w/ custom DMA obj-$(CONFIG_PDC_ADMA) += pdc_adma.o diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c index 5064f3ea20f1..db4380d70031 100644 --- a/drivers/ata/ahci.c +++ b/drivers/ata/ahci.c @@ -1146,11 +1146,18 @@ int ahci_host_activate(struct ata_host *host, int irq, unsigned int n_msis) return rc; for (i = 0; i < host->n_ports; i++) { + const char* desc; struct ahci_port_priv *pp = host->ports[i]->private_data; + /* pp is NULL for dummy ports */ + if (pp) + desc = pp->irq_desc; + else + desc = dev_driver_string(host->dev); + rc = devm_request_threaded_irq(host->dev, irq + i, ahci_hw_interrupt, ahci_thread_fn, IRQF_SHARED, - pp->irq_desc, host->ports[i]); + desc, host->ports[i]); if (rc) goto out_free_irqs; } diff --git a/drivers/ata/ahci_imx.c b/drivers/ata/ahci_imx.c new file mode 100644 index 000000000000..58debb0acc3a --- /dev/null +++ b/drivers/ata/ahci_imx.c @@ -0,0 +1,236 @@ +/* + * Freescale IMX AHCI SATA platform driver + * Copyright 2013 Freescale Semiconductor, Inc. + * + * based on the AHCI SATA platform driver by Jeff Garzik and Anton Vorontsov + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/ahci_platform.h> +#include <linux/of_device.h> +#include <linux/mfd/syscon.h> +#include <linux/mfd/syscon/imx6q-iomuxc-gpr.h> +#include "ahci.h" + +enum { + HOST_TIMER1MS = 0xe0, /* Timer 1-ms */ +}; + +struct imx_ahci_priv { + struct platform_device *ahci_pdev; + struct clk *sata_ref_clk; + struct clk *ahb_clk; + struct regmap *gpr; +}; + +static int imx6q_sata_init(struct device *dev, void __iomem *mmio) +{ + int ret = 0; + unsigned int reg_val; + struct imx_ahci_priv *imxpriv = dev_get_drvdata(dev->parent); + + imxpriv->gpr = + syscon_regmap_lookup_by_compatible("fsl,imx6q-iomuxc-gpr"); + if (IS_ERR(imxpriv->gpr)) { + dev_err(dev, "failed to find fsl,imx6q-iomux-gpr regmap\n"); + return PTR_ERR(imxpriv->gpr); + } + + ret = clk_prepare_enable(imxpriv->sata_ref_clk); + if (ret < 0) { + dev_err(dev, "prepare-enable sata_ref clock err:%d\n", ret); + return ret; + } + + /* + * set PHY Paremeters, two steps to configure the GPR13, + * one write for rest of parameters, mask of first write + * is 0x07fffffd, and the other one write for setting + * the mpll_clk_en. + */ + regmap_update_bits(imxpriv->gpr, 0x34, IMX6Q_GPR13_SATA_RX_EQ_VAL_MASK + | IMX6Q_GPR13_SATA_RX_LOS_LVL_MASK + | IMX6Q_GPR13_SATA_RX_DPLL_MODE_MASK + | IMX6Q_GPR13_SATA_SPD_MODE_MASK + | IMX6Q_GPR13_SATA_MPLL_SS_EN + | IMX6Q_GPR13_SATA_TX_ATTEN_MASK + | IMX6Q_GPR13_SATA_TX_BOOST_MASK + | IMX6Q_GPR13_SATA_TX_LVL_MASK + | IMX6Q_GPR13_SATA_TX_EDGE_RATE + , IMX6Q_GPR13_SATA_RX_EQ_VAL_3_0_DB + | IMX6Q_GPR13_SATA_RX_LOS_LVL_SATA2M + | IMX6Q_GPR13_SATA_RX_DPLL_MODE_2P_4F + | IMX6Q_GPR13_SATA_SPD_MODE_3P0G + | IMX6Q_GPR13_SATA_MPLL_SS_EN + | IMX6Q_GPR13_SATA_TX_ATTEN_9_16 + | IMX6Q_GPR13_SATA_TX_BOOST_3_33_DB + | IMX6Q_GPR13_SATA_TX_LVL_1_025_V); + regmap_update_bits(imxpriv->gpr, 0x34, IMX6Q_GPR13_SATA_MPLL_CLK_EN, + IMX6Q_GPR13_SATA_MPLL_CLK_EN); + usleep_range(100, 200); + + /* + * Configure the HWINIT bits of the HOST_CAP and HOST_PORTS_IMPL, + * and IP vendor specific register HOST_TIMER1MS. + * Configure CAP_SSS (support stagered spin up). + * Implement the port0. + * Get the ahb clock rate, and configure the TIMER1MS register. + */ + reg_val = readl(mmio + HOST_CAP); + if (!(reg_val & HOST_CAP_SSS)) { + reg_val |= HOST_CAP_SSS; + writel(reg_val, mmio + HOST_CAP); + } + reg_val = readl(mmio + HOST_PORTS_IMPL); + if (!(reg_val & 0x1)) { + reg_val |= 0x1; + writel(reg_val, mmio + HOST_PORTS_IMPL); + } + + reg_val = clk_get_rate(imxpriv->ahb_clk) / 1000; + writel(reg_val, mmio + HOST_TIMER1MS); + + return 0; +} + +static void imx6q_sata_exit(struct device *dev) +{ + struct imx_ahci_priv *imxpriv = dev_get_drvdata(dev->parent); + + regmap_update_bits(imxpriv->gpr, 0x34, IMX6Q_GPR13_SATA_MPLL_CLK_EN, + !IMX6Q_GPR13_SATA_MPLL_CLK_EN); + clk_disable_unprepare(imxpriv->sata_ref_clk); +} + +static struct ahci_platform_data imx6q_sata_pdata = { + .init = imx6q_sata_init, + .exit = imx6q_sata_exit, +}; + +static const struct of_device_id imx_ahci_of_match[] = { + { .compatible = "fsl,imx6q-ahci", .data = &imx6q_sata_pdata}, + {}, +}; +MODULE_DEVICE_TABLE(of, imx_ahci_of_match); + +static int imx_ahci_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct resource *mem, *irq, res[2]; + const struct of_device_id *of_id; + const struct ahci_platform_data *pdata = NULL; + struct imx_ahci_priv *imxpriv; + struct device *ahci_dev; + struct platform_device *ahci_pdev; + int ret; + + imxpriv = devm_kzalloc(dev, sizeof(*imxpriv), GFP_KERNEL); + if (!imxpriv) { + dev_err(dev, "can't alloc ahci_host_priv\n"); + return -ENOMEM; + } + + ahci_pdev = platform_device_alloc("ahci", -1); + if (!ahci_pdev) + return -ENODEV; + + ahci_dev = &ahci_pdev->dev; + ahci_dev->parent = dev; + + imxpriv->ahb_clk = devm_clk_get(dev, "ahb"); + if (IS_ERR(imxpriv->ahb_clk)) { + dev_err(dev, "can't get ahb clock.\n"); + ret = PTR_ERR(imxpriv->ahb_clk); + goto err_out; + } + + imxpriv->sata_ref_clk = devm_clk_get(dev, "sata_ref"); + if (IS_ERR(imxpriv->sata_ref_clk)) { + dev_err(dev, "can't get sata_ref clock.\n"); + ret = PTR_ERR(imxpriv->sata_ref_clk); + goto err_out; + } + + imxpriv->ahci_pdev = ahci_pdev; + platform_set_drvdata(pdev, imxpriv); + + of_id = of_match_device(imx_ahci_of_match, dev); + if (of_id) { + pdata = of_id->data; + } else { + ret = -EINVAL; + goto err_out; + } + + mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + if (!mem || !irq) { + dev_err(dev, "no mmio/irq resource\n"); + ret = -ENOMEM; + goto err_out; + } + + res[0] = *mem; + res[1] = *irq; + + ahci_dev->coherent_dma_mask = DMA_BIT_MASK(32); + ahci_dev->dma_mask = &ahci_dev->coherent_dma_mask; + ahci_dev->of_node = dev->of_node; + + ret = platform_device_add_resources(ahci_pdev, res, 2); + if (ret) + goto err_out; + + ret = platform_device_add_data(ahci_pdev, pdata, sizeof(*pdata)); + if (ret) + goto err_out; + + ret = platform_device_add(ahci_pdev); + if (ret) { +err_out: + platform_device_put(ahci_pdev); + return ret; + } + + return 0; +} + +static int imx_ahci_remove(struct platform_device *pdev) +{ + struct imx_ahci_priv *imxpriv = platform_get_drvdata(pdev); + struct platform_device *ahci_pdev = imxpriv->ahci_pdev; + + platform_device_unregister(ahci_pdev); + return 0; +} + +static struct platform_driver imx_ahci_driver = { + .probe = imx_ahci_probe, + .remove = imx_ahci_remove, + .driver = { + .name = "ahci-imx", + .owner = THIS_MODULE, + .of_match_table = imx_ahci_of_match, + }, +}; +module_platform_driver(imx_ahci_driver); + +MODULE_DESCRIPTION("Freescale i.MX AHCI SATA platform driver"); +MODULE_AUTHOR("Richard Zhu <Hong-Xing.Zhu@freescale.com>"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("ahci:imx"); diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c index b52a10c8eeb9..513ad7ed0c99 100644 --- a/drivers/ata/ata_piix.c +++ b/drivers/ata/ata_piix.c @@ -330,7 +330,7 @@ static const struct pci_device_id piix_pci_tbl[] = { /* SATA Controller IDE (Wellsburg) */ { 0x8086, 0x8d00, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb }, /* SATA Controller IDE (Wellsburg) */ - { 0x8086, 0x8d08, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata }, + { 0x8086, 0x8d08, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata_snb }, /* SATA Controller IDE (Wellsburg) */ { 0x8086, 0x8d60, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb }, /* SATA Controller IDE (Wellsburg) */ diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index 83c08907e042..b1e880a3c3da 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -206,8 +206,10 @@ static ssize_t ata_scsi_park_store(struct device *device, unsigned long flags; int rc; - rc = strict_strtol(buf, 10, &input); - if (rc || input < -2) + rc = kstrtol(buf, 10, &input); + if (rc) + return rc; + if (input < -2) return -EINVAL; if (input > ATA_TMOUT_MAX_PARK) { rc = -EOVERFLOW; diff --git a/drivers/ata/sata_inic162x.c b/drivers/ata/sata_inic162x.c index e45131748248..5c54d957370a 100644 --- a/drivers/ata/sata_inic162x.c +++ b/drivers/ata/sata_inic162x.c @@ -6,6 +6,18 @@ * * This file is released under GPL v2. * + * **** WARNING **** + * + * This driver never worked properly and unfortunately data corruption is + * relatively common. There isn't anyone working on the driver and there's + * no support from the vendor. Do not use this driver in any production + * environment. + * + * http://thread.gmane.org/gmane.linux.debian.devel.bugs.rc/378525/focus=54491 + * https://bugzilla.kernel.org/show_bug.cgi?id=60565 + * + * ***************** + * * This controller is eccentric and easily locks up if something isn't * right. Documentation is available at initio's website but it only * documents registers (not programming model). @@ -807,6 +819,8 @@ static int inic_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) ata_print_version_once(&pdev->dev, DRV_VERSION); + dev_alert(&pdev->dev, "inic162x support is broken with common data corruption issues and will be disabled by default, contact linux-ide@vger.kernel.org if in production use\n"); + /* alloc host */ host = ata_host_alloc_pinfo(&pdev->dev, ppi, NR_PORTS); hpriv = devm_kzalloc(&pdev->dev, sizeof(*hpriv), GFP_KERNEL); diff --git a/drivers/block/Kconfig b/drivers/block/Kconfig index b81ddfea1da0..e07a5fd58ad7 100644 --- a/drivers/block/Kconfig +++ b/drivers/block/Kconfig @@ -532,11 +532,11 @@ config BLK_DEV_RBD If unsure, say N. config BLK_DEV_RSXX - tristate "IBM FlashSystem 70/80 PCIe SSD Device Driver" + tristate "IBM Flash Adapter 900GB Full Height PCIe Device Driver" depends on PCI help Device driver for IBM's high speed PCIe SSD - storage devices: FlashSystem-70 and FlashSystem-80. + storage device: Flash Adapter 900GB Full Height. To compile this driver as a module, choose M here: the module will be called rsxx. diff --git a/drivers/block/drbd/drbd_actlog.c b/drivers/block/drbd/drbd_actlog.c index 6608076dc39e..28c73ca320a8 100644 --- a/drivers/block/drbd/drbd_actlog.c +++ b/drivers/block/drbd/drbd_actlog.c @@ -659,6 +659,27 @@ void drbd_al_shrink(struct drbd_conf *mdev) wake_up(&mdev->al_wait); } +int drbd_initialize_al(struct drbd_conf *mdev, void *buffer) +{ + struct al_transaction_on_disk *al = buffer; + struct drbd_md *md = &mdev->ldev->md; + sector_t al_base = md->md_offset + md->al_offset; + int al_size_4k = md->al_stripes * md->al_stripe_size_4k; + int i; + + memset(al, 0, 4096); + al->magic = cpu_to_be32(DRBD_AL_MAGIC); + al->transaction_type = cpu_to_be16(AL_TR_INITIALIZED); + al->crc32c = cpu_to_be32(crc32c(0, al, 4096)); + + for (i = 0; i < al_size_4k; i++) { + int err = drbd_md_sync_page_io(mdev, mdev->ldev, al_base + i * 8, WRITE); + if (err) + return err; + } + return 0; +} + static int w_update_odbm(struct drbd_work *w, int unused) { struct update_odbm_work *udw = container_of(w, struct update_odbm_work, w); diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h index f943aacfdad8..2d7f608d181c 100644 --- a/drivers/block/drbd/drbd_int.h +++ b/drivers/block/drbd/drbd_int.h @@ -832,6 +832,7 @@ struct drbd_tconn { /* is a resource from the config file */ unsigned susp_nod:1; /* IO suspended because no data */ unsigned susp_fen:1; /* IO suspended because fence peer handler runs */ struct mutex cstate_mutex; /* Protects graceful disconnects */ + unsigned int connect_cnt; /* Inc each time a connection is established */ unsigned long flags; struct net_conf *net_conf; /* content protected by rcu */ @@ -1132,6 +1133,7 @@ extern void drbd_mdev_cleanup(struct drbd_conf *mdev); void drbd_print_uuids(struct drbd_conf *mdev, const char *text); extern void conn_md_sync(struct drbd_tconn *tconn); +extern void drbd_md_write(struct drbd_conf *mdev, void *buffer); extern void drbd_md_sync(struct drbd_conf *mdev); extern int drbd_md_read(struct drbd_conf *mdev, struct drbd_backing_dev *bdev); extern void drbd_uuid_set(struct drbd_conf *mdev, int idx, u64 val) __must_hold(local); @@ -1466,8 +1468,16 @@ extern void drbd_suspend_io(struct drbd_conf *mdev); extern void drbd_resume_io(struct drbd_conf *mdev); extern char *ppsize(char *buf, unsigned long long size); extern sector_t drbd_new_dev_size(struct drbd_conf *, struct drbd_backing_dev *, sector_t, int); -enum determine_dev_size { dev_size_error = -1, unchanged = 0, shrunk = 1, grew = 2 }; -extern enum determine_dev_size drbd_determine_dev_size(struct drbd_conf *, enum dds_flags) __must_hold(local); +enum determine_dev_size { + DS_ERROR_SHRINK = -3, + DS_ERROR_SPACE_MD = -2, + DS_ERROR = -1, + DS_UNCHANGED = 0, + DS_SHRUNK = 1, + DS_GREW = 2 +}; +extern enum determine_dev_size +drbd_determine_dev_size(struct drbd_conf *, enum dds_flags, struct resize_parms *) __must_hold(local); extern void resync_after_online_grow(struct drbd_conf *); extern void drbd_reconsider_max_bio_size(struct drbd_conf *mdev); extern enum drbd_state_rv drbd_set_role(struct drbd_conf *mdev, @@ -1633,6 +1643,7 @@ extern int __drbd_set_out_of_sync(struct drbd_conf *mdev, sector_t sector, #define drbd_set_out_of_sync(mdev, sector, size) \ __drbd_set_out_of_sync(mdev, sector, size, __FILE__, __LINE__) extern void drbd_al_shrink(struct drbd_conf *mdev); +extern int drbd_initialize_al(struct drbd_conf *, void *); /* drbd_nl.c */ /* state info broadcast */ diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c index a5dca6affcbb..55635edf563b 100644 --- a/drivers/block/drbd/drbd_main.c +++ b/drivers/block/drbd/drbd_main.c @@ -2762,8 +2762,6 @@ int __init drbd_init(void) /* * allocate all necessary structs */ - err = -ENOMEM; - init_waitqueue_head(&drbd_pp_wait); drbd_proc = NULL; /* play safe for drbd_cleanup */ @@ -2773,6 +2771,7 @@ int __init drbd_init(void) if (err) goto fail; + err = -ENOMEM; drbd_proc = proc_create_data("drbd", S_IFREG | S_IRUGO , NULL, &drbd_proc_fops, NULL); if (!drbd_proc) { printk(KERN_ERR "drbd: unable to register proc file\n"); @@ -2803,7 +2802,6 @@ int __init drbd_init(void) fail: drbd_cleanup(); if (err == -ENOMEM) - /* currently always the case */ printk(KERN_ERR "drbd: ran out of memory\n"); else printk(KERN_ERR "drbd: initialization failure\n"); @@ -2881,34 +2879,14 @@ struct meta_data_on_disk { u8 reserved_u8[4096 - (7*8 + 10*4)]; } __packed; -/** - * drbd_md_sync() - Writes the meta data super block if the MD_DIRTY flag bit is set - * @mdev: DRBD device. - */ -void drbd_md_sync(struct drbd_conf *mdev) + + +void drbd_md_write(struct drbd_conf *mdev, void *b) { - struct meta_data_on_disk *buffer; + struct meta_data_on_disk *buffer = b; sector_t sector; int i; - /* Don't accidentally change the DRBD meta data layout. */ - BUILD_BUG_ON(UI_SIZE != 4); - BUILD_BUG_ON(sizeof(struct meta_data_on_disk) != 4096); - - del_timer(&mdev->md_sync_timer); - /* timer may be rearmed by drbd_md_mark_dirty() now. */ - if (!test_and_clear_bit(MD_DIRTY, &mdev->flags)) - return; - - /* We use here D_FAILED and not D_ATTACHING because we try to write - * metadata even if we detach due to a disk failure! */ - if (!get_ldev_if_state(mdev, D_FAILED)) - return; - - buffer = drbd_md_get_buffer(mdev); - if (!buffer) - goto out; - memset(buffer, 0, sizeof(*buffer)); buffer->la_size_sect = cpu_to_be64(drbd_get_capacity(mdev->this_bdev)); @@ -2937,6 +2915,35 @@ void drbd_md_sync(struct drbd_conf *mdev) dev_err(DEV, "meta data update failed!\n"); drbd_chk_io_error(mdev, 1, DRBD_META_IO_ERROR); } +} + +/** + * drbd_md_sync() - Writes the meta data super block if the MD_DIRTY flag bit is set + * @mdev: DRBD device. + */ +void drbd_md_sync(struct drbd_conf *mdev) +{ + struct meta_data_on_disk *buffer; + + /* Don't accidentally change the DRBD meta data layout. */ + BUILD_BUG_ON(UI_SIZE != 4); + BUILD_BUG_ON(sizeof(struct meta_data_on_disk) != 4096); + + del_timer(&mdev->md_sync_timer); + /* timer may be rearmed by drbd_md_mark_dirty() now. */ + if (!test_and_clear_bit(MD_DIRTY, &mdev->flags)) + return; + + /* We use here D_FAILED and not D_ATTACHING because we try to write + * metadata even if we detach due to a disk failure! */ + if (!get_ldev_if_state(mdev, D_FAILED)) + return; + + buffer = drbd_md_get_buffer(mdev); + if (!buffer) + goto out; + + drbd_md_write(mdev, buffer); /* Update mdev->ldev->md.la_size_sect, * since we updated it on metadata. */ diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c index 9e3f441e7e84..8cc1e640f485 100644 --- a/drivers/block/drbd/drbd_nl.c +++ b/drivers/block/drbd/drbd_nl.c @@ -417,6 +417,7 @@ static enum drbd_fencing_p highest_fencing_policy(struct drbd_tconn *tconn) bool conn_try_outdate_peer(struct drbd_tconn *tconn) { + unsigned int connect_cnt; union drbd_state mask = { }; union drbd_state val = { }; enum drbd_fencing_p fp; @@ -428,6 +429,10 @@ bool conn_try_outdate_peer(struct drbd_tconn *tconn) return false; } + spin_lock_irq(&tconn->req_lock); + connect_cnt = tconn->connect_cnt; + spin_unlock_irq(&tconn->req_lock); + fp = highest_fencing_policy(tconn); switch (fp) { case FP_NOT_AVAIL: @@ -492,8 +497,14 @@ bool conn_try_outdate_peer(struct drbd_tconn *tconn) here, because we might were able to re-establish the connection in the meantime. */ spin_lock_irq(&tconn->req_lock); - if (tconn->cstate < C_WF_REPORT_PARAMS && !test_bit(STATE_SENT, &tconn->flags)) - _conn_request_state(tconn, mask, val, CS_VERBOSE); + if (tconn->cstate < C_WF_REPORT_PARAMS && !test_bit(STATE_SENT, &tconn->flags)) { + if (tconn->connect_cnt != connect_cnt) + /* In case the connection was established and droped + while the fence-peer handler was running, ignore it */ + conn_info(tconn, "Ignoring fence-peer exit code\n"); + else + _conn_request_state(tconn, mask, val, CS_VERBOSE); + } spin_unlock_irq(&tconn->req_lock); return conn_highest_pdsk(tconn) <= D_OUTDATED; @@ -816,15 +827,20 @@ void drbd_resume_io(struct drbd_conf *mdev) * Returns 0 on success, negative return values indicate errors. * You should call drbd_md_sync() after calling this function. */ -enum determine_dev_size drbd_determine_dev_size(struct drbd_conf *mdev, enum dds_flags flags) __must_hold(local) +enum determine_dev_size +drbd_determine_dev_size(struct drbd_conf *mdev, enum dds_flags flags, struct resize_parms *rs) __must_hold(local) { sector_t prev_first_sect, prev_size; /* previous meta location */ sector_t la_size_sect, u_size; + struct drbd_md *md = &mdev->ldev->md; + u32 prev_al_stripe_size_4k; + u32 prev_al_stripes; sector_t size; char ppb[10]; + void *buffer; int md_moved, la_size_changed; - enum determine_dev_size rv = unchanged; + enum determine_dev_size rv = DS_UNCHANGED; /* race: * application request passes inc_ap_bio, @@ -836,6 +852,11 @@ enum determine_dev_size drbd_determine_dev_size(struct drbd_conf *mdev, enum dds * still lock the act_log to not trigger ASSERTs there. */ drbd_suspend_io(mdev); + buffer = drbd_md_get_buffer(mdev); /* Lock meta-data IO */ + if (!buffer) { + drbd_resume_io(mdev); + return DS_ERROR; + } /* no wait necessary anymore, actually we could assert that */ wait_event(mdev->al_wait, lc_try_lock(mdev->act_log)); @@ -844,7 +865,17 @@ enum determine_dev_size drbd_determine_dev_size(struct drbd_conf *mdev, enum dds prev_size = mdev->ldev->md.md_size_sect; la_size_sect = mdev->ldev->md.la_size_sect; - /* TODO: should only be some assert here, not (re)init... */ + if (rs) { + /* rs is non NULL if we should change the AL layout only */ + + prev_al_stripes = md->al_stripes; + prev_al_stripe_size_4k = md->al_stripe_size_4k; + + md->al_stripes = rs->al_stripes; + md->al_stripe_size_4k = rs->al_stripe_size / 4; + md->al_size_4k = (u64)rs->al_stripes * rs->al_stripe_size / 4; + } + drbd_md_set_sector_offsets(mdev, mdev->ldev); rcu_read_lock(); @@ -852,6 +883,21 @@ enum determine_dev_size drbd_determine_dev_size(struct drbd_conf *mdev, enum dds rcu_read_unlock(); size = drbd_new_dev_size(mdev, mdev->ldev, u_size, flags & DDSF_FORCED); + if (size < la_size_sect) { + if (rs && u_size == 0) { + /* Remove "rs &&" later. This check should always be active, but + right now the receiver expects the permissive behavior */ + dev_warn(DEV, "Implicit shrink not allowed. " + "Use --size=%llus for explicit shrink.\n", + (unsigned long long)size); + rv = DS_ERROR_SHRINK; + } + if (u_size > size) + rv = DS_ERROR_SPACE_MD; + if (rv != DS_UNCHANGED) + goto err_out; + } + if (drbd_get_capacity(mdev->this_bdev) != size || drbd_bm_capacity(mdev) != size) { int err; @@ -867,7 +913,7 @@ enum determine_dev_size drbd_determine_dev_size(struct drbd_conf *mdev, enum dds "Leaving size unchanged at size = %lu KB\n", (unsigned long)size); } - rv = dev_size_error; + rv = DS_ERROR; } /* racy, see comments above. */ drbd_set_my_capacity(mdev, size); @@ -875,38 +921,57 @@ enum determine_dev_size drbd_determine_dev_size(struct drbd_conf *mdev, enum dds dev_info(DEV, "size = %s (%llu KB)\n", ppsize(ppb, size>>1), (unsigned long long)size>>1); } - if (rv == dev_size_error) - goto out; + if (rv <= DS_ERROR) + goto err_out; la_size_changed = (la_size_sect != mdev->ldev->md.la_size_sect); md_moved = prev_first_sect != drbd_md_first_sector(mdev->ldev) || prev_size != mdev->ldev->md.md_size_sect; - if (la_size_changed || md_moved) { - int err; + if (la_size_changed || md_moved || rs) { + u32 prev_flags; drbd_al_shrink(mdev); /* All extents inactive. */ + + prev_flags = md->flags; + md->flags &= ~MDF_PRIMARY_IND; + drbd_md_write(mdev, buffer); + dev_info(DEV, "Writing the whole bitmap, %s\n", la_size_changed && md_moved ? "size changed and md moved" : la_size_changed ? "size changed" : "md moved"); /* next line implicitly does drbd_suspend_io()+drbd_resume_io() */ - err = drbd_bitmap_io(mdev, md_moved ? &drbd_bm_write_all : &drbd_bm_write, - "size changed", BM_LOCKED_MASK); - if (err) { - rv = dev_size_error; - goto out; - } - drbd_md_mark_dirty(mdev); + drbd_bitmap_io(mdev, md_moved ? &drbd_bm_write_all : &drbd_bm_write, + "size changed", BM_LOCKED_MASK); + drbd_initialize_al(mdev, buffer); + + md->flags = prev_flags; + drbd_md_write(mdev, buffer); + + if (rs) + dev_info(DEV, "Changed AL layout to al-stripes = %d, al-stripe-size-kB = %d\n", + md->al_stripes, md->al_stripe_size_4k * 4); } if (size > la_size_sect) - rv = grew; + rv = DS_GREW; if (size < la_size_sect) - rv = shrunk; -out: + rv = DS_SHRUNK; + + if (0) { + err_out: + if (rs) { + md->al_stripes = prev_al_stripes; + md->al_stripe_size_4k = prev_al_stripe_size_4k; + md->al_size_4k = (u64)prev_al_stripes * prev_al_stripe_size_4k; + + drbd_md_set_sector_offsets(mdev, mdev->ldev); + } + } lc_unlock(mdev->act_log); wake_up(&mdev->al_wait); + drbd_md_put_buffer(mdev); drbd_resume_io(mdev); return rv; @@ -1607,11 +1672,11 @@ int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info) !drbd_md_test_flag(mdev->ldev, MDF_CONNECTED_IND)) set_bit(USE_DEGR_WFC_T, &mdev->flags); - dd = drbd_determine_dev_size(mdev, 0); - if (dd == dev_size_error) { + dd = drbd_determine_dev_size(mdev, 0, NULL); + if (dd <= DS_ERROR) { retcode = ERR_NOMEM_BITMAP; goto force_diskless_dec; - } else if (dd == grew) + } else if (dd == DS_GREW) set_bit(RESYNC_AFTER_NEG, &mdev->flags); if (drbd_md_test_flag(mdev->ldev, MDF_FULL_SYNC) || @@ -2305,6 +2370,7 @@ int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info) struct drbd_conf *mdev; enum drbd_ret_code retcode; enum determine_dev_size dd; + bool change_al_layout = false; enum dds_flags ddsf; sector_t u_size; int err; @@ -2315,31 +2381,33 @@ int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info) if (retcode != NO_ERROR) goto fail; + mdev = adm_ctx.mdev; + if (!get_ldev(mdev)) { + retcode = ERR_NO_DISK; + goto fail; + } + memset(&rs, 0, sizeof(struct resize_parms)); + rs.al_stripes = mdev->ldev->md.al_stripes; + rs.al_stripe_size = mdev->ldev->md.al_stripe_size_4k * 4; if (info->attrs[DRBD_NLA_RESIZE_PARMS]) { err = resize_parms_from_attrs(&rs, info); if (err) { retcode = ERR_MANDATORY_TAG; drbd_msg_put_info(from_attrs_err_to_txt(err)); - goto fail; + goto fail_ldev; } } - mdev = adm_ctx.mdev; if (mdev->state.conn > C_CONNECTED) { retcode = ERR_RESIZE_RESYNC; - goto fail; + goto fail_ldev; } if (mdev->state.role == R_SECONDARY && mdev->state.peer == R_SECONDARY) { retcode = ERR_NO_PRIMARY; - goto fail; - } - - if (!get_ldev(mdev)) { - retcode = ERR_NO_DISK; - goto fail; + goto fail_ldev; } if (rs.no_resync && mdev->tconn->agreed_pro_version < 93) { @@ -2358,6 +2426,28 @@ int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info) } } + if (mdev->ldev->md.al_stripes != rs.al_stripes || + mdev->ldev->md.al_stripe_size_4k != rs.al_stripe_size / 4) { + u32 al_size_k = rs.al_stripes * rs.al_stripe_size; + + if (al_size_k > (16 * 1024 * 1024)) { + retcode = ERR_MD_LAYOUT_TOO_BIG; + goto fail_ldev; + } + + if (al_size_k < MD_32kB_SECT/2) { + retcode = ERR_MD_LAYOUT_TOO_SMALL; + goto fail_ldev; + } + + if (mdev->state.conn != C_CONNECTED) { + retcode = ERR_MD_LAYOUT_CONNECTED; + goto fail_ldev; + } + + change_al_layout = true; + } + if (mdev->ldev->known_size != drbd_get_capacity(mdev->ldev->backing_bdev)) mdev->ldev->known_size = drbd_get_capacity(mdev->ldev->backing_bdev); @@ -2373,16 +2463,22 @@ int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info) } ddsf = (rs.resize_force ? DDSF_FORCED : 0) | (rs.no_resync ? DDSF_NO_RESYNC : 0); - dd = drbd_determine_dev_size(mdev, ddsf); + dd = drbd_determine_dev_size(mdev, ddsf, change_al_layout ? &rs : NULL); drbd_md_sync(mdev); put_ldev(mdev); - if (dd == dev_size_error) { + if (dd == DS_ERROR) { retcode = ERR_NOMEM_BITMAP; goto fail; + } else if (dd == DS_ERROR_SPACE_MD) { + retcode = ERR_MD_LAYOUT_NO_FIT; + goto fail; + } else if (dd == DS_ERROR_SHRINK) { + retcode = ERR_IMPLICIT_SHRINK; + goto fail; } if (mdev->state.conn == C_CONNECTED) { - if (dd == grew) + if (dd == DS_GREW) set_bit(RESIZE_PENDING, &mdev->flags); drbd_send_uuids(mdev); @@ -2658,7 +2754,6 @@ int nla_put_status_info(struct sk_buff *skb, struct drbd_conf *mdev, const struct sib_info *sib) { struct state_info *si = NULL; /* for sizeof(si->member); */ - struct net_conf *nc; struct nlattr *nla; int got_ldev; int err = 0; @@ -2688,13 +2783,19 @@ int nla_put_status_info(struct sk_buff *skb, struct drbd_conf *mdev, goto nla_put_failure; rcu_read_lock(); - if (got_ldev) - if (disk_conf_to_skb(skb, rcu_dereference(mdev->ldev->disk_conf), exclude_sensitive)) - goto nla_put_failure; + if (got_ldev) { + struct disk_conf *disk_conf; - nc = rcu_dereference(mdev->tconn->net_conf); - if (nc) - err = net_conf_to_skb(skb, nc, exclude_sensitive); + disk_conf = rcu_dereference(mdev->ldev->disk_conf); + err = disk_conf_to_skb(skb, disk_conf, exclude_sensitive); + } + if (!err) { + struct net_conf *nc; + + nc = rcu_dereference(mdev->tconn->net_conf); + if (nc) + err = net_conf_to_skb(skb, nc, exclude_sensitive); + } rcu_read_unlock(); if (err) goto nla_put_failure; diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c index 4222affff488..cc29cd3bf78b 100644 --- a/drivers/block/drbd/drbd_receiver.c +++ b/drivers/block/drbd/drbd_receiver.c @@ -1039,6 +1039,8 @@ randomize: rcu_read_lock(); idr_for_each_entry(&tconn->volumes, mdev, vnr) { kref_get(&mdev->kref); + rcu_read_unlock(); + /* Prevent a race between resync-handshake and * being promoted to Primary. * @@ -1049,8 +1051,6 @@ randomize: mutex_lock(mdev->state_mutex); mutex_unlock(mdev->state_mutex); - rcu_read_unlock(); - if (discard_my_data) set_bit(DISCARD_MY_DATA, &mdev->flags); else @@ -3545,7 +3545,7 @@ static int receive_sizes(struct drbd_tconn *tconn, struct packet_info *pi) { struct drbd_conf *mdev; struct p_sizes *p = pi->data; - enum determine_dev_size dd = unchanged; + enum determine_dev_size dd = DS_UNCHANGED; sector_t p_size, p_usize, my_usize; int ldsc = 0; /* local disk size changed */ enum dds_flags ddsf; @@ -3617,9 +3617,9 @@ static int receive_sizes(struct drbd_tconn *tconn, struct packet_info *pi) ddsf = be16_to_cpu(p->dds_flags); if (get_ldev(mdev)) { - dd = drbd_determine_dev_size(mdev, ddsf); + dd = drbd_determine_dev_size(mdev, ddsf, NULL); put_ldev(mdev); - if (dd == dev_size_error) + if (dd == DS_ERROR) return -EIO; drbd_md_sync(mdev); } else { @@ -3647,7 +3647,7 @@ static int receive_sizes(struct drbd_tconn *tconn, struct packet_info *pi) drbd_send_sizes(mdev, 0, ddsf); } if (test_and_clear_bit(RESIZE_PENDING, &mdev->flags) || - (dd == grew && mdev->state.conn == C_CONNECTED)) { + (dd == DS_GREW && mdev->state.conn == C_CONNECTED)) { if (mdev->state.pdsk >= D_INCONSISTENT && mdev->state.disk >= D_INCONSISTENT) { if (ddsf & DDSF_NO_RESYNC) diff --git a/drivers/block/drbd/drbd_state.c b/drivers/block/drbd/drbd_state.c index 90c5be2b1d30..216d47b7e88b 100644 --- a/drivers/block/drbd/drbd_state.c +++ b/drivers/block/drbd/drbd_state.c @@ -1115,8 +1115,10 @@ __drbd_set_state(struct drbd_conf *mdev, union drbd_state ns, drbd_thread_restart_nowait(&mdev->tconn->receiver); /* Resume AL writing if we get a connection */ - if (os.conn < C_CONNECTED && ns.conn >= C_CONNECTED) + if (os.conn < C_CONNECTED && ns.conn >= C_CONNECTED) { drbd_resume_al(mdev); + mdev->tconn->connect_cnt++; + } /* remember last attach time so request_timer_fn() won't * kill newly established sessions while we are still trying to thaw diff --git a/drivers/block/rsxx/core.c b/drivers/block/rsxx/core.c index 5af21f2db29c..6e85e21445eb 100644 --- a/drivers/block/rsxx/core.c +++ b/drivers/block/rsxx/core.c @@ -31,6 +31,8 @@ #include <linux/slab.h> #include <linux/bitops.h> #include <linux/delay.h> +#include <linux/debugfs.h> +#include <linux/seq_file.h> #include <linux/genhd.h> #include <linux/idr.h> @@ -39,8 +41,9 @@ #include "rsxx_cfg.h" #define NO_LEGACY 0 +#define SYNC_START_TIMEOUT (10 * 60) /* 10 minutes */ -MODULE_DESCRIPTION("IBM FlashSystem 70/80 PCIe SSD Device Driver"); +MODULE_DESCRIPTION("IBM Flash Adapter 900GB Full Height Device Driver"); MODULE_AUTHOR("Joshua Morris/Philip Kelleher, IBM"); MODULE_LICENSE("GPL"); MODULE_VERSION(DRIVER_VERSION); @@ -49,9 +52,282 @@ static unsigned int force_legacy = NO_LEGACY; module_param(force_legacy, uint, 0444); MODULE_PARM_DESC(force_legacy, "Force the use of legacy type PCI interrupts"); +static unsigned int sync_start = 1; +module_param(sync_start, uint, 0444); +MODULE_PARM_DESC(sync_start, "On by Default: Driver load will not complete " + "until the card startup has completed."); + static DEFINE_IDA(rsxx_disk_ida); static DEFINE_SPINLOCK(rsxx_ida_lock); +/* --------------------Debugfs Setup ------------------- */ + +struct rsxx_cram { + u32 f_pos; + u32 offset; + void *i_private; +}; + +static int rsxx_attr_pci_regs_show(struct seq_file *m, void *p) +{ + struct rsxx_cardinfo *card = m->private; + + seq_printf(m, "HWID 0x%08x\n", + ioread32(card->regmap + HWID)); + seq_printf(m, "SCRATCH 0x%08x\n", + ioread32(card->regmap + SCRATCH)); + seq_printf(m, "IER 0x%08x\n", + ioread32(card->regmap + IER)); + seq_printf(m, "IPR 0x%08x\n", + ioread32(card->regmap + IPR)); + seq_printf(m, "CREG_CMD 0x%08x\n", + ioread32(card->regmap + CREG_CMD)); + seq_printf(m, "CREG_ADD 0x%08x\n", + ioread32(card->regmap + CREG_ADD)); + seq_printf(m, "CREG_CNT 0x%08x\n", + ioread32(card->regmap + CREG_CNT)); + seq_printf(m, "CREG_STAT 0x%08x\n", + ioread32(card->regmap + CREG_STAT)); + seq_printf(m, "CREG_DATA0 0x%08x\n", + ioread32(card->regmap + CREG_DATA0)); + seq_printf(m, "CREG_DATA1 0x%08x\n", + ioread32(card->regmap + CREG_DATA1)); + seq_printf(m, "CREG_DATA2 0x%08x\n", + ioread32(card->regmap + CREG_DATA2)); + seq_printf(m, "CREG_DATA3 0x%08x\n", + ioread32(card->regmap + CREG_DATA3)); + seq_printf(m, "CREG_DATA4 0x%08x\n", + ioread32(card->regmap + CREG_DATA4)); + seq_printf(m, "CREG_DATA5 0x%08x\n", + ioread32(card->regmap + CREG_DATA5)); + seq_printf(m, "CREG_DATA6 0x%08x\n", + ioread32(card->regmap + CREG_DATA6)); + seq_printf(m, "CREG_DATA7 0x%08x\n", + ioread32(card->regmap + CREG_DATA7)); + seq_printf(m, "INTR_COAL 0x%08x\n", + ioread32(card->regmap + INTR_COAL)); + seq_printf(m, "HW_ERROR 0x%08x\n", + ioread32(card->regmap + HW_ERROR)); + seq_printf(m, "DEBUG0 0x%08x\n", + ioread32(card->regmap + PCI_DEBUG0)); + seq_printf(m, "DEBUG1 0x%08x\n", + ioread32(card->regmap + PCI_DEBUG1)); + seq_printf(m, "DEBUG2 0x%08x\n", + ioread32(card->regmap + PCI_DEBUG2)); + seq_printf(m, "DEBUG3 0x%08x\n", + ioread32(card->regmap + PCI_DEBUG3)); + seq_printf(m, "DEBUG4 0x%08x\n", + ioread32(card->regmap + PCI_DEBUG4)); + seq_printf(m, "DEBUG5 0x%08x\n", + ioread32(card->regmap + PCI_DEBUG5)); + seq_printf(m, "DEBUG6 0x%08x\n", + ioread32(card->regmap + PCI_DEBUG6)); + seq_printf(m, "DEBUG7 0x%08x\n", + ioread32(card->regmap + PCI_DEBUG7)); + seq_printf(m, "RECONFIG 0x%08x\n", + ioread32(card->regmap + PCI_RECONFIG)); + + return 0; +} + +static int rsxx_attr_stats_show(struct seq_file *m, void *p) +{ + struct rsxx_cardinfo *card = m->private; + int i; + + for (i = 0; i < card->n_targets; i++) { + seq_printf(m, "Ctrl %d CRC Errors = %d\n", + i, card->ctrl[i].stats.crc_errors); + seq_printf(m, "Ctrl %d Hard Errors = %d\n", + i, card->ctrl[i].stats.hard_errors); + seq_printf(m, "Ctrl %d Soft Errors = %d\n", + i, card->ctrl[i].stats.soft_errors); + seq_printf(m, "Ctrl %d Writes Issued = %d\n", + i, card->ctrl[i].stats.writes_issued); + seq_printf(m, "Ctrl %d Writes Failed = %d\n", + i, card->ctrl[i].stats.writes_failed); + seq_printf(m, "Ctrl %d Reads Issued = %d\n", + i, card->ctrl[i].stats.reads_issued); + seq_printf(m, "Ctrl %d Reads Failed = %d\n", + i, card->ctrl[i].stats.reads_failed); + seq_printf(m, "Ctrl %d Reads Retried = %d\n", + i, card->ctrl[i].stats.reads_retried); + seq_printf(m, "Ctrl %d Discards Issued = %d\n", + i, card->ctrl[i].stats.discards_issued); + seq_printf(m, "Ctrl %d Discards Failed = %d\n", + i, card->ctrl[i].stats.discards_failed); + seq_printf(m, "Ctrl %d DMA SW Errors = %d\n", + i, card->ctrl[i].stats.dma_sw_err); + seq_printf(m, "Ctrl %d DMA HW Faults = %d\n", + i, card->ctrl[i].stats.dma_hw_fault); + seq_printf(m, "Ctrl %d DMAs Cancelled = %d\n", + i, card->ctrl[i].stats.dma_cancelled); + seq_printf(m, "Ctrl %d SW Queue Depth = %d\n", + i, card->ctrl[i].stats.sw_q_depth); + seq_printf(m, "Ctrl %d HW Queue Depth = %d\n", + i, atomic_read(&card->ctrl[i].stats.hw_q_depth)); + } + + return 0; +} + +static int rsxx_attr_stats_open(struct inode *inode, struct file *file) +{ + return single_open(file, rsxx_attr_stats_show, inode->i_private); +} + +static int rsxx_attr_pci_regs_open(struct inode *inode, struct file *file) +{ + return single_open(file, rsxx_attr_pci_regs_show, inode->i_private); +} + +static ssize_t rsxx_cram_read(struct file *fp, char __user *ubuf, + size_t cnt, loff_t *ppos) +{ + struct rsxx_cram *info = fp->private_data; + struct rsxx_cardinfo *card = info->i_private; + char *buf; + int st; + + buf = kzalloc(sizeof(*buf) * cnt, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + info->f_pos = (u32)*ppos + info->offset; + + st = rsxx_creg_read(card, CREG_ADD_CRAM + info->f_pos, cnt, buf, 1); + if (st) + return st; + + st = copy_to_user(ubuf, buf, cnt); + if (st) + return st; + + info->offset += cnt; + + kfree(buf); + + return cnt; +} + +static ssize_t rsxx_cram_write(struct file *fp, const char __user *ubuf, + size_t cnt, loff_t *ppos) +{ + struct rsxx_cram *info = fp->private_data; + struct rsxx_cardinfo *card = info->i_private; + char *buf; + int st; + + buf = kzalloc(sizeof(*buf) * cnt, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + st = copy_from_user(buf, ubuf, cnt); + if (st) + return st; + + info->f_pos = (u32)*ppos + info->offset; + + st = rsxx_creg_write(card, CREG_ADD_CRAM + info->f_pos, cnt, buf, 1); + if (st) + return st; + + info->offset += cnt; + + kfree(buf); + + return cnt; +} + +static int rsxx_cram_open(struct inode *inode, struct file *file) +{ + struct rsxx_cram *info = kzalloc(sizeof(*info), GFP_KERNEL); + if (!info) + return -ENOMEM; + + info->i_private = inode->i_private; + info->f_pos = file->f_pos; + file->private_data = info; + + return 0; +} + +static int rsxx_cram_release(struct inode *inode, struct file *file) +{ + struct rsxx_cram *info = file->private_data; + + if (!info) + return 0; + + kfree(info); + file->private_data = NULL; + + return 0; +} + +static const struct file_operations debugfs_cram_fops = { + .owner = THIS_MODULE, + .open = rsxx_cram_open, + .read = rsxx_cram_read, + .write = rsxx_cram_write, + .release = rsxx_cram_release, +}; + +static const struct file_operations debugfs_stats_fops = { + .owner = THIS_MODULE, + .open = rsxx_attr_stats_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static const struct file_operations debugfs_pci_regs_fops = { + .owner = THIS_MODULE, + .open = rsxx_attr_pci_regs_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static void rsxx_debugfs_dev_new(struct rsxx_cardinfo *card) +{ + struct dentry *debugfs_stats; + struct dentry *debugfs_pci_regs; + struct dentry *debugfs_cram; + + card->debugfs_dir = debugfs_create_dir(card->gendisk->disk_name, NULL); + if (IS_ERR_OR_NULL(card->debugfs_dir)) + goto failed_debugfs_dir; + + debugfs_stats = debugfs_create_file("stats", S_IRUGO, + card->debugfs_dir, card, + &debugfs_stats_fops); + if (IS_ERR_OR_NULL(debugfs_stats)) + goto failed_debugfs_stats; + + debugfs_pci_regs = debugfs_create_file("pci_regs", S_IRUGO, + card->debugfs_dir, card, + &debugfs_pci_regs_fops); + if (IS_ERR_OR_NULL(debugfs_pci_regs)) + goto failed_debugfs_pci_regs; + + debugfs_cram = debugfs_create_file("cram", S_IRUGO | S_IWUSR, + card->debugfs_dir, card, + &debugfs_cram_fops); + if (IS_ERR_OR_NULL(debugfs_cram)) + goto failed_debugfs_cram; + + return; +failed_debugfs_cram: + debugfs_remove(debugfs_pci_regs); +failed_debugfs_pci_regs: + debugfs_remove(debugfs_stats); +failed_debugfs_stats: + debugfs_remove(card->debugfs_dir); +failed_debugfs_dir: + card->debugfs_dir = NULL; +} + /*----------------- Interrupt Control & Handling -------------------*/ static void rsxx_mask_interrupts(struct rsxx_cardinfo *card) @@ -163,12 +439,13 @@ static irqreturn_t rsxx_isr(int irq, void *pdata) } if (isr & CR_INTR_CREG) { - schedule_work(&card->creg_ctrl.done_work); + queue_work(card->creg_ctrl.creg_wq, + &card->creg_ctrl.done_work); handled++; } if (isr & CR_INTR_EVENT) { - schedule_work(&card->event_work); + queue_work(card->event_wq, &card->event_work); rsxx_disable_ier_and_isr(card, CR_INTR_EVENT); handled++; } @@ -329,7 +606,7 @@ static int rsxx_eeh_frozen(struct pci_dev *dev) int i; int st; - dev_warn(&dev->dev, "IBM FlashSystem PCI: preparing for slot reset.\n"); + dev_warn(&dev->dev, "IBM Flash Adapter PCI: preparing for slot reset.\n"); card->eeh_state = 1; rsxx_mask_interrupts(card); @@ -367,15 +644,26 @@ static void rsxx_eeh_failure(struct pci_dev *dev) { struct rsxx_cardinfo *card = pci_get_drvdata(dev); int i; + int cnt = 0; - dev_err(&dev->dev, "IBM FlashSystem PCI: disabling failed card.\n"); + dev_err(&dev->dev, "IBM Flash Adapter PCI: disabling failed card.\n"); card->eeh_state = 1; + card->halt = 1; - for (i = 0; i < card->n_targets; i++) - del_timer_sync(&card->ctrl[i].activity_timer); + for (i = 0; i < card->n_targets; i++) { + spin_lock_bh(&card->ctrl[i].queue_lock); + cnt = rsxx_cleanup_dma_queue(&card->ctrl[i], + &card->ctrl[i].queue); + spin_unlock_bh(&card->ctrl[i].queue_lock); + + cnt += rsxx_dma_cancel(&card->ctrl[i]); - rsxx_eeh_cancel_dmas(card); + if (cnt) + dev_info(CARD_TO_DEV(card), + "Freed %d queued DMAs on channel %d\n", + cnt, card->ctrl[i].id); + } } static int rsxx_eeh_fifo_flush_poll(struct rsxx_cardinfo *card) @@ -432,7 +720,7 @@ static pci_ers_result_t rsxx_slot_reset(struct pci_dev *dev) int st; dev_warn(&dev->dev, - "IBM FlashSystem PCI: recovering from slot reset.\n"); + "IBM Flash Adapter PCI: recovering from slot reset.\n"); st = pci_enable_device(dev); if (st) @@ -485,7 +773,7 @@ static pci_ers_result_t rsxx_slot_reset(struct pci_dev *dev) &card->ctrl[i].issue_dma_work); } - dev_info(&dev->dev, "IBM FlashSystem PCI: recovery complete.\n"); + dev_info(&dev->dev, "IBM Flash Adapter PCI: recovery complete.\n"); return PCI_ERS_RESULT_RECOVERED; @@ -528,6 +816,7 @@ static int rsxx_pci_probe(struct pci_dev *dev, { struct rsxx_cardinfo *card; int st; + unsigned int sync_timeout; dev_info(&dev->dev, "PCI-Flash SSD discovered\n"); @@ -610,7 +899,11 @@ static int rsxx_pci_probe(struct pci_dev *dev, } /************* Setup Processor Command Interface *************/ - rsxx_creg_setup(card); + st = rsxx_creg_setup(card); + if (st) { + dev_err(CARD_TO_DEV(card), "Failed to setup creg interface.\n"); + goto failed_creg_setup; + } spin_lock_irq(&card->irq_lock); rsxx_enable_ier_and_isr(card, CR_INTR_CREG); @@ -650,6 +943,12 @@ static int rsxx_pci_probe(struct pci_dev *dev, } /************* Setup Card Event Handler *************/ + card->event_wq = create_singlethread_workqueue(DRIVER_NAME"_event"); + if (!card->event_wq) { + dev_err(CARD_TO_DEV(card), "Failed card event setup.\n"); + goto failed_event_handler; + } + INIT_WORK(&card->event_work, card_event_handler); st = rsxx_setup_dev(card); @@ -676,6 +975,33 @@ static int rsxx_pci_probe(struct pci_dev *dev, if (st) dev_crit(CARD_TO_DEV(card), "Failed issuing card startup\n"); + if (sync_start) { + sync_timeout = SYNC_START_TIMEOUT; + + dev_info(CARD_TO_DEV(card), + "Waiting for card to startup\n"); + + do { + ssleep(1); + sync_timeout--; + + rsxx_get_card_state(card, &card->state); + } while (sync_timeout && + (card->state == CARD_STATE_STARTING)); + + if (card->state == CARD_STATE_STARTING) { + dev_warn(CARD_TO_DEV(card), + "Card startup timed out\n"); + card->size8 = 0; + } else { + dev_info(CARD_TO_DEV(card), + "card state: %s\n", + rsxx_card_state_to_str(card->state)); + st = rsxx_get_card_size8(card, &card->size8); + if (st) + card->size8 = 0; + } + } } else if (card->state == CARD_STATE_GOOD || card->state == CARD_STATE_RD_ONLY_FAULT) { st = rsxx_get_card_size8(card, &card->size8); @@ -685,12 +1011,21 @@ static int rsxx_pci_probe(struct pci_dev *dev, rsxx_attach_dev(card); + /************* Setup Debugfs *************/ + rsxx_debugfs_dev_new(card); + return 0; failed_create_dev: + destroy_workqueue(card->event_wq); + card->event_wq = NULL; +failed_event_handler: rsxx_dma_destroy(card); failed_dma_setup: failed_compatiblity_check: + destroy_workqueue(card->creg_ctrl.creg_wq); + card->creg_ctrl.creg_wq = NULL; +failed_creg_setup: spin_lock_irq(&card->irq_lock); rsxx_disable_ier_and_isr(card, CR_INTR_ALL); spin_unlock_irq(&card->irq_lock); @@ -756,6 +1091,8 @@ static void rsxx_pci_remove(struct pci_dev *dev) /* Prevent work_structs from re-queuing themselves. */ card->halt = 1; + debugfs_remove_recursive(card->debugfs_dir); + free_irq(dev->irq, card); if (!force_legacy) diff --git a/drivers/block/rsxx/cregs.c b/drivers/block/rsxx/cregs.c index 4b5c020a0a65..926dce9c452f 100644 --- a/drivers/block/rsxx/cregs.c +++ b/drivers/block/rsxx/cregs.c @@ -431,6 +431,15 @@ static int __issue_creg_rw(struct rsxx_cardinfo *card, *hw_stat = completion.creg_status; if (completion.st) { + /* + * This read is needed to verify that there has not been any + * extreme errors that might have occurred, i.e. EEH. The + * function iowrite32 will not detect EEH errors, so it is + * necessary that we recover if such an error is the reason + * for the timeout. This is a dummy read. + */ + ioread32(card->regmap + SCRATCH); + dev_warn(CARD_TO_DEV(card), "creg command failed(%d x%08x)\n", completion.st, addr); @@ -727,6 +736,11 @@ int rsxx_creg_setup(struct rsxx_cardinfo *card) { card->creg_ctrl.active_cmd = NULL; + card->creg_ctrl.creg_wq = + create_singlethread_workqueue(DRIVER_NAME"_creg"); + if (!card->creg_ctrl.creg_wq) + return -ENOMEM; + INIT_WORK(&card->creg_ctrl.done_work, creg_cmd_done); mutex_init(&card->creg_ctrl.reset_lock); INIT_LIST_HEAD(&card->creg_ctrl.queue); diff --git a/drivers/block/rsxx/dev.c b/drivers/block/rsxx/dev.c index 4346d17d2949..d7af441880be 100644 --- a/drivers/block/rsxx/dev.c +++ b/drivers/block/rsxx/dev.c @@ -155,7 +155,8 @@ static void bio_dma_done_cb(struct rsxx_cardinfo *card, atomic_set(&meta->error, 1); if (atomic_dec_and_test(&meta->pending_dmas)) { - disk_stats_complete(card, meta->bio, meta->start_time); + if (!card->eeh_state && card->gendisk) + disk_stats_complete(card, meta->bio, meta->start_time); bio_endio(meta->bio, atomic_read(&meta->error) ? -EIO : 0); kmem_cache_free(bio_meta_pool, meta); @@ -170,6 +171,12 @@ static void rsxx_make_request(struct request_queue *q, struct bio *bio) might_sleep(); + if (!card) + goto req_err; + + if (bio->bi_sector + (bio->bi_size >> 9) > get_capacity(card->gendisk)) + goto req_err; + if (unlikely(card->halt)) { st = -EFAULT; goto req_err; @@ -196,7 +203,8 @@ static void rsxx_make_request(struct request_queue *q, struct bio *bio) atomic_set(&bio_meta->pending_dmas, 0); bio_meta->start_time = jiffies; - disk_stats_start(card, bio); + if (!unlikely(card->halt)) + disk_stats_start(card, bio); dev_dbg(CARD_TO_DEV(card), "BIO[%c]: meta: %p addr8: x%llx size: %d\n", bio_data_dir(bio) ? 'W' : 'R', bio_meta, @@ -225,24 +233,6 @@ static bool rsxx_discard_supported(struct rsxx_cardinfo *card) return (pci_rev >= RSXX_DISCARD_SUPPORT); } -static unsigned short rsxx_get_logical_block_size( - struct rsxx_cardinfo *card) -{ - u32 capabilities = 0; - int st; - - st = rsxx_get_card_capabilities(card, &capabilities); - if (st) - dev_warn(CARD_TO_DEV(card), - "Failed reading card capabilities register\n"); - - /* Earlier firmware did not have support for 512 byte accesses */ - if (capabilities & CARD_CAP_SUBPAGE_WRITES) - return 512; - else - return RSXX_HW_BLK_SIZE; -} - int rsxx_attach_dev(struct rsxx_cardinfo *card) { mutex_lock(&card->dev_lock); @@ -305,7 +295,7 @@ int rsxx_setup_dev(struct rsxx_cardinfo *card) return -ENOMEM; } - blk_size = rsxx_get_logical_block_size(card); + blk_size = card->config.data.block_size; blk_queue_make_request(card->queue, rsxx_make_request); blk_queue_bounce_limit(card->queue, BLK_BOUNCE_ANY); @@ -347,6 +337,7 @@ void rsxx_destroy_dev(struct rsxx_cardinfo *card) card->gendisk = NULL; blk_cleanup_queue(card->queue); + card->queue->queuedata = NULL; unregister_blkdev(card->major, DRIVER_NAME); } diff --git a/drivers/block/rsxx/dma.c b/drivers/block/rsxx/dma.c index 0607513cfb41..bed32f16b084 100644 --- a/drivers/block/rsxx/dma.c +++ b/drivers/block/rsxx/dma.c @@ -245,6 +245,22 @@ static void rsxx_complete_dma(struct rsxx_dma_ctrl *ctrl, kmem_cache_free(rsxx_dma_pool, dma); } +int rsxx_cleanup_dma_queue(struct rsxx_dma_ctrl *ctrl, + struct list_head *q) +{ + struct rsxx_dma *dma; + struct rsxx_dma *tmp; + int cnt = 0; + + list_for_each_entry_safe(dma, tmp, q, list) { + list_del(&dma->list); + rsxx_complete_dma(ctrl, dma, DMA_CANCELLED); + cnt++; + } + + return cnt; +} + static void rsxx_requeue_dma(struct rsxx_dma_ctrl *ctrl, struct rsxx_dma *dma) { @@ -252,9 +268,10 @@ static void rsxx_requeue_dma(struct rsxx_dma_ctrl *ctrl, * Requeued DMAs go to the front of the queue so they are issued * first. */ - spin_lock(&ctrl->queue_lock); + spin_lock_bh(&ctrl->queue_lock); + ctrl->stats.sw_q_depth++; list_add(&dma->list, &ctrl->queue); - spin_unlock(&ctrl->queue_lock); + spin_unlock_bh(&ctrl->queue_lock); } static void rsxx_handle_dma_error(struct rsxx_dma_ctrl *ctrl, @@ -329,6 +346,7 @@ static void rsxx_handle_dma_error(struct rsxx_dma_ctrl *ctrl, static void dma_engine_stalled(unsigned long data) { struct rsxx_dma_ctrl *ctrl = (struct rsxx_dma_ctrl *)data; + int cnt; if (atomic_read(&ctrl->stats.hw_q_depth) == 0 || unlikely(ctrl->card->eeh_state)) @@ -349,18 +367,28 @@ static void dma_engine_stalled(unsigned long data) "DMA channel %d has stalled, faulting interface.\n", ctrl->id); ctrl->card->dma_fault = 1; + + /* Clean up the DMA queue */ + spin_lock(&ctrl->queue_lock); + cnt = rsxx_cleanup_dma_queue(ctrl, &ctrl->queue); + spin_unlock(&ctrl->queue_lock); + + cnt += rsxx_dma_cancel(ctrl); + + if (cnt) + dev_info(CARD_TO_DEV(ctrl->card), + "Freed %d queued DMAs on channel %d\n", + cnt, ctrl->id); } } -static void rsxx_issue_dmas(struct work_struct *work) +static void rsxx_issue_dmas(struct rsxx_dma_ctrl *ctrl) { - struct rsxx_dma_ctrl *ctrl; struct rsxx_dma *dma; int tag; int cmds_pending = 0; struct hw_cmd *hw_cmd_buf; - ctrl = container_of(work, struct rsxx_dma_ctrl, issue_dma_work); hw_cmd_buf = ctrl->cmd.buf; if (unlikely(ctrl->card->halt) || @@ -368,22 +396,22 @@ static void rsxx_issue_dmas(struct work_struct *work) return; while (1) { - spin_lock(&ctrl->queue_lock); + spin_lock_bh(&ctrl->queue_lock); if (list_empty(&ctrl->queue)) { - spin_unlock(&ctrl->queue_lock); + spin_unlock_bh(&ctrl->queue_lock); break; } - spin_unlock(&ctrl->queue_lock); + spin_unlock_bh(&ctrl->queue_lock); tag = pop_tracker(ctrl->trackers); if (tag == -1) break; - spin_lock(&ctrl->queue_lock); + spin_lock_bh(&ctrl->queue_lock); dma = list_entry(ctrl->queue.next, struct rsxx_dma, list); list_del(&dma->list); ctrl->stats.sw_q_depth--; - spin_unlock(&ctrl->queue_lock); + spin_unlock_bh(&ctrl->queue_lock); /* * This will catch any DMAs that slipped in right before the @@ -440,9 +468,8 @@ static void rsxx_issue_dmas(struct work_struct *work) } } -static void rsxx_dma_done(struct work_struct *work) +static void rsxx_dma_done(struct rsxx_dma_ctrl *ctrl) { - struct rsxx_dma_ctrl *ctrl; struct rsxx_dma *dma; unsigned long flags; u16 count; @@ -450,7 +477,6 @@ static void rsxx_dma_done(struct work_struct *work) u8 tag; struct hw_status *hw_st_buf; - ctrl = container_of(work, struct rsxx_dma_ctrl, dma_done_work); hw_st_buf = ctrl->status.buf; if (unlikely(ctrl->card->halt) || @@ -520,33 +546,32 @@ static void rsxx_dma_done(struct work_struct *work) rsxx_enable_ier(ctrl->card, CR_INTR_DMA(ctrl->id)); spin_unlock_irqrestore(&ctrl->card->irq_lock, flags); - spin_lock(&ctrl->queue_lock); + spin_lock_bh(&ctrl->queue_lock); if (ctrl->stats.sw_q_depth) queue_work(ctrl->issue_wq, &ctrl->issue_dma_work); - spin_unlock(&ctrl->queue_lock); + spin_unlock_bh(&ctrl->queue_lock); } -static int rsxx_cleanup_dma_queue(struct rsxx_cardinfo *card, - struct list_head *q) +static void rsxx_schedule_issue(struct work_struct *work) { - struct rsxx_dma *dma; - struct rsxx_dma *tmp; - int cnt = 0; + struct rsxx_dma_ctrl *ctrl; - list_for_each_entry_safe(dma, tmp, q, list) { - list_del(&dma->list); + ctrl = container_of(work, struct rsxx_dma_ctrl, issue_dma_work); - if (dma->dma_addr) - pci_unmap_page(card->dev, dma->dma_addr, - get_dma_size(dma), - (dma->cmd == HW_CMD_BLK_WRITE) ? - PCI_DMA_TODEVICE : - PCI_DMA_FROMDEVICE); - kmem_cache_free(rsxx_dma_pool, dma); - cnt++; - } + mutex_lock(&ctrl->work_lock); + rsxx_issue_dmas(ctrl); + mutex_unlock(&ctrl->work_lock); +} - return cnt; +static void rsxx_schedule_done(struct work_struct *work) +{ + struct rsxx_dma_ctrl *ctrl; + + ctrl = container_of(work, struct rsxx_dma_ctrl, dma_done_work); + + mutex_lock(&ctrl->work_lock); + rsxx_dma_done(ctrl); + mutex_unlock(&ctrl->work_lock); } static int rsxx_queue_discard(struct rsxx_cardinfo *card, @@ -698,10 +723,10 @@ int rsxx_dma_queue_bio(struct rsxx_cardinfo *card, for (i = 0; i < card->n_targets; i++) { if (!list_empty(&dma_list[i])) { - spin_lock(&card->ctrl[i].queue_lock); + spin_lock_bh(&card->ctrl[i].queue_lock); card->ctrl[i].stats.sw_q_depth += dma_cnt[i]; list_splice_tail(&dma_list[i], &card->ctrl[i].queue); - spin_unlock(&card->ctrl[i].queue_lock); + spin_unlock_bh(&card->ctrl[i].queue_lock); queue_work(card->ctrl[i].issue_wq, &card->ctrl[i].issue_dma_work); @@ -711,8 +736,11 @@ int rsxx_dma_queue_bio(struct rsxx_cardinfo *card, return 0; bvec_err: - for (i = 0; i < card->n_targets; i++) - rsxx_cleanup_dma_queue(card, &dma_list[i]); + for (i = 0; i < card->n_targets; i++) { + spin_lock_bh(&card->ctrl[i].queue_lock); + rsxx_cleanup_dma_queue(&card->ctrl[i], &dma_list[i]); + spin_unlock_bh(&card->ctrl[i].queue_lock); + } return st; } @@ -780,6 +808,7 @@ static int rsxx_dma_ctrl_init(struct pci_dev *dev, spin_lock_init(&ctrl->trackers->lock); spin_lock_init(&ctrl->queue_lock); + mutex_init(&ctrl->work_lock); INIT_LIST_HEAD(&ctrl->queue); setup_timer(&ctrl->activity_timer, dma_engine_stalled, @@ -793,8 +822,8 @@ static int rsxx_dma_ctrl_init(struct pci_dev *dev, if (!ctrl->done_wq) return -ENOMEM; - INIT_WORK(&ctrl->issue_dma_work, rsxx_issue_dmas); - INIT_WORK(&ctrl->dma_done_work, rsxx_dma_done); + INIT_WORK(&ctrl->issue_dma_work, rsxx_schedule_issue); + INIT_WORK(&ctrl->dma_done_work, rsxx_schedule_done); st = rsxx_hw_buffers_init(dev, ctrl); if (st) @@ -918,13 +947,30 @@ failed_dma_setup: return st; } +int rsxx_dma_cancel(struct rsxx_dma_ctrl *ctrl) +{ + struct rsxx_dma *dma; + int i; + int cnt = 0; + + /* Clean up issued DMAs */ + for (i = 0; i < RSXX_MAX_OUTSTANDING_CMDS; i++) { + dma = get_tracker_dma(ctrl->trackers, i); + if (dma) { + atomic_dec(&ctrl->stats.hw_q_depth); + rsxx_complete_dma(ctrl, dma, DMA_CANCELLED); + push_tracker(ctrl->trackers, i); + cnt++; + } + } + + return cnt; +} void rsxx_dma_destroy(struct rsxx_cardinfo *card) { struct rsxx_dma_ctrl *ctrl; - struct rsxx_dma *dma; - int i, j; - int cnt = 0; + int i; for (i = 0; i < card->n_targets; i++) { ctrl = &card->ctrl[i]; @@ -943,33 +989,11 @@ void rsxx_dma_destroy(struct rsxx_cardinfo *card) del_timer_sync(&ctrl->activity_timer); /* Clean up the DMA queue */ - spin_lock(&ctrl->queue_lock); - cnt = rsxx_cleanup_dma_queue(card, &ctrl->queue); - spin_unlock(&ctrl->queue_lock); - - if (cnt) - dev_info(CARD_TO_DEV(card), - "Freed %d queued DMAs on channel %d\n", - cnt, i); - - /* Clean up issued DMAs */ - for (j = 0; j < RSXX_MAX_OUTSTANDING_CMDS; j++) { - dma = get_tracker_dma(ctrl->trackers, j); - if (dma) { - pci_unmap_page(card->dev, dma->dma_addr, - get_dma_size(dma), - (dma->cmd == HW_CMD_BLK_WRITE) ? - PCI_DMA_TODEVICE : - PCI_DMA_FROMDEVICE); - kmem_cache_free(rsxx_dma_pool, dma); - cnt++; - } - } + spin_lock_bh(&ctrl->queue_lock); + rsxx_cleanup_dma_queue(ctrl, &ctrl->queue); + spin_unlock_bh(&ctrl->queue_lock); - if (cnt) - dev_info(CARD_TO_DEV(card), - "Freed %d pending DMAs on channel %d\n", - cnt, i); + rsxx_dma_cancel(ctrl); vfree(ctrl->trackers); @@ -1013,7 +1037,7 @@ int rsxx_eeh_save_issued_dmas(struct rsxx_cardinfo *card) cnt++; } - spin_lock(&card->ctrl[i].queue_lock); + spin_lock_bh(&card->ctrl[i].queue_lock); list_splice(&issued_dmas[i], &card->ctrl[i].queue); atomic_sub(cnt, &card->ctrl[i].stats.hw_q_depth); @@ -1028,7 +1052,7 @@ int rsxx_eeh_save_issued_dmas(struct rsxx_cardinfo *card) PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); } - spin_unlock(&card->ctrl[i].queue_lock); + spin_unlock_bh(&card->ctrl[i].queue_lock); } kfree(issued_dmas); @@ -1036,30 +1060,13 @@ int rsxx_eeh_save_issued_dmas(struct rsxx_cardinfo *card) return 0; } -void rsxx_eeh_cancel_dmas(struct rsxx_cardinfo *card) -{ - struct rsxx_dma *dma; - struct rsxx_dma *tmp; - int i; - - for (i = 0; i < card->n_targets; i++) { - spin_lock(&card->ctrl[i].queue_lock); - list_for_each_entry_safe(dma, tmp, &card->ctrl[i].queue, list) { - list_del(&dma->list); - - rsxx_complete_dma(&card->ctrl[i], dma, DMA_CANCELLED); - } - spin_unlock(&card->ctrl[i].queue_lock); - } -} - int rsxx_eeh_remap_dmas(struct rsxx_cardinfo *card) { struct rsxx_dma *dma; int i; for (i = 0; i < card->n_targets; i++) { - spin_lock(&card->ctrl[i].queue_lock); + spin_lock_bh(&card->ctrl[i].queue_lock); list_for_each_entry(dma, &card->ctrl[i].queue, list) { dma->dma_addr = pci_map_page(card->dev, dma->page, dma->pg_off, get_dma_size(dma), @@ -1067,12 +1074,12 @@ int rsxx_eeh_remap_dmas(struct rsxx_cardinfo *card) PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); if (!dma->dma_addr) { - spin_unlock(&card->ctrl[i].queue_lock); + spin_unlock_bh(&card->ctrl[i].queue_lock); kmem_cache_free(rsxx_dma_pool, dma); return -ENOMEM; } } - spin_unlock(&card->ctrl[i].queue_lock); + spin_unlock_bh(&card->ctrl[i].queue_lock); } return 0; diff --git a/drivers/block/rsxx/rsxx_priv.h b/drivers/block/rsxx/rsxx_priv.h index 382e8bf5c03b..5ad5055a4104 100644 --- a/drivers/block/rsxx/rsxx_priv.h +++ b/drivers/block/rsxx/rsxx_priv.h @@ -39,6 +39,7 @@ #include <linux/vmalloc.h> #include <linux/timer.h> #include <linux/ioctl.h> +#include <linux/delay.h> #include "rsxx.h" #include "rsxx_cfg.h" @@ -114,6 +115,7 @@ struct rsxx_dma_ctrl { struct timer_list activity_timer; struct dma_tracker_list *trackers; struct rsxx_dma_stats stats; + struct mutex work_lock; }; struct rsxx_cardinfo { @@ -134,6 +136,7 @@ struct rsxx_cardinfo { spinlock_t lock; bool active; struct creg_cmd *active_cmd; + struct workqueue_struct *creg_wq; struct work_struct done_work; struct list_head queue; unsigned int q_depth; @@ -154,6 +157,7 @@ struct rsxx_cardinfo { int buf_len; } log; + struct workqueue_struct *event_wq; struct work_struct event_work; unsigned int state; u64 size8; @@ -181,6 +185,8 @@ struct rsxx_cardinfo { int n_targets; struct rsxx_dma_ctrl *ctrl; + + struct dentry *debugfs_dir; }; enum rsxx_pci_regmap { @@ -283,6 +289,7 @@ enum rsxx_creg_addr { CREG_ADD_CAPABILITIES = 0x80001050, CREG_ADD_LOG = 0x80002000, CREG_ADD_NUM_TARGETS = 0x80003000, + CREG_ADD_CRAM = 0xA0000000, CREG_ADD_CONFIG = 0xB0000000, }; @@ -372,6 +379,8 @@ typedef void (*rsxx_dma_cb)(struct rsxx_cardinfo *card, int rsxx_dma_setup(struct rsxx_cardinfo *card); void rsxx_dma_destroy(struct rsxx_cardinfo *card); int rsxx_dma_init(void); +int rsxx_cleanup_dma_queue(struct rsxx_dma_ctrl *ctrl, struct list_head *q); +int rsxx_dma_cancel(struct rsxx_dma_ctrl *ctrl); void rsxx_dma_cleanup(void); void rsxx_dma_queue_reset(struct rsxx_cardinfo *card); int rsxx_dma_configure(struct rsxx_cardinfo *card); @@ -382,7 +391,6 @@ int rsxx_dma_queue_bio(struct rsxx_cardinfo *card, void *cb_data); int rsxx_hw_buffers_init(struct pci_dev *dev, struct rsxx_dma_ctrl *ctrl); int rsxx_eeh_save_issued_dmas(struct rsxx_cardinfo *card); -void rsxx_eeh_cancel_dmas(struct rsxx_cardinfo *card); int rsxx_eeh_remap_dmas(struct rsxx_cardinfo *card); /***** cregs.c *****/ diff --git a/drivers/block/xen-blkback/blkback.c b/drivers/block/xen-blkback/blkback.c index dd5b2fed97e9..bf4b9d282c04 100644 --- a/drivers/block/xen-blkback/blkback.c +++ b/drivers/block/xen-blkback/blkback.c @@ -50,110 +50,118 @@ #include "common.h" /* - * These are rather arbitrary. They are fairly large because adjacent requests - * pulled from a communication ring are quite likely to end up being part of - * the same scatter/gather request at the disc. + * Maximum number of unused free pages to keep in the internal buffer. + * Setting this to a value too low will reduce memory used in each backend, + * but can have a performance penalty. * - * ** TRY INCREASING 'xen_blkif_reqs' IF WRITE SPEEDS SEEM TOO LOW ** - * - * This will increase the chances of being able to write whole tracks. - * 64 should be enough to keep us competitive with Linux. + * A sane value is xen_blkif_reqs * BLKIF_MAX_SEGMENTS_PER_REQUEST, but can + * be set to a lower value that might degrade performance on some intensive + * IO workloads. */ -static int xen_blkif_reqs = 64; -module_param_named(reqs, xen_blkif_reqs, int, 0); -MODULE_PARM_DESC(reqs, "Number of blkback requests to allocate"); -/* Run-time switchable: /sys/module/blkback/parameters/ */ -static unsigned int log_stats; -module_param(log_stats, int, 0644); +static int xen_blkif_max_buffer_pages = 1024; +module_param_named(max_buffer_pages, xen_blkif_max_buffer_pages, int, 0644); +MODULE_PARM_DESC(max_buffer_pages, +"Maximum number of free pages to keep in each block backend buffer"); /* - * Each outstanding request that we've passed to the lower device layers has a - * 'pending_req' allocated to it. Each buffer_head that completes decrements - * the pendcnt towards zero. When it hits zero, the specified domain has a - * response queued for it, with the saved 'id' passed back. + * Maximum number of grants to map persistently in blkback. For maximum + * performance this should be the total numbers of grants that can be used + * to fill the ring, but since this might become too high, specially with + * the use of indirect descriptors, we set it to a value that provides good + * performance without using too much memory. + * + * When the list of persistent grants is full we clean it up using a LRU + * algorithm. */ -struct pending_req { - struct xen_blkif *blkif; - u64 id; - int nr_pages; - atomic_t pendcnt; - unsigned short operation; - int status; - struct list_head free_list; - DECLARE_BITMAP(unmap_seg, BLKIF_MAX_SEGMENTS_PER_REQUEST); -}; -#define BLKBACK_INVALID_HANDLE (~0) +static int xen_blkif_max_pgrants = 1056; +module_param_named(max_persistent_grants, xen_blkif_max_pgrants, int, 0644); +MODULE_PARM_DESC(max_persistent_grants, + "Maximum number of grants to map persistently"); -struct xen_blkbk { - struct pending_req *pending_reqs; - /* List of all 'pending_req' available */ - struct list_head pending_free; - /* And its spinlock. */ - spinlock_t pending_free_lock; - wait_queue_head_t pending_free_wq; - /* The list of all pages that are available. */ - struct page **pending_pages; - /* And the grant handles that are available. */ - grant_handle_t *pending_grant_handles; -}; - -static struct xen_blkbk *blkbk; +/* + * The LRU mechanism to clean the lists of persistent grants needs to + * be executed periodically. The time interval between consecutive executions + * of the purge mechanism is set in ms. + */ +#define LRU_INTERVAL 100 /* - * Maximum number of grant pages that can be mapped in blkback. - * BLKIF_MAX_SEGMENTS_PER_REQUEST * RING_SIZE is the maximum number of - * pages that blkback will persistently map. - * Currently, this is: - * RING_SIZE = 32 (for all known ring types) - * BLKIF_MAX_SEGMENTS_PER_REQUEST = 11 - * sizeof(struct persistent_gnt) = 48 - * So the maximum memory used to store the grants is: - * 32 * 11 * 48 = 16896 bytes + * When the persistent grants list is full we will remove unused grants + * from the list. The percent number of grants to be removed at each LRU + * execution. */ -static inline unsigned int max_mapped_grant_pages(enum blkif_protocol protocol) +#define LRU_PERCENT_CLEAN 5 + +/* Run-time switchable: /sys/module/blkback/parameters/ */ +static unsigned int log_stats; +module_param(log_stats, int, 0644); + +#define BLKBACK_INVALID_HANDLE (~0) + +/* Number of free pages to remove on each call to free_xenballooned_pages */ +#define NUM_BATCH_FREE_PAGES 10 + +static inline int get_free_page(struct xen_blkif *blkif, struct page **page) { - switch (protocol) { - case BLKIF_PROTOCOL_NATIVE: - return __CONST_RING_SIZE(blkif, PAGE_SIZE) * - BLKIF_MAX_SEGMENTS_PER_REQUEST; - case BLKIF_PROTOCOL_X86_32: - return __CONST_RING_SIZE(blkif_x86_32, PAGE_SIZE) * - BLKIF_MAX_SEGMENTS_PER_REQUEST; - case BLKIF_PROTOCOL_X86_64: - return __CONST_RING_SIZE(blkif_x86_64, PAGE_SIZE) * - BLKIF_MAX_SEGMENTS_PER_REQUEST; - default: - BUG(); + unsigned long flags; + + spin_lock_irqsave(&blkif->free_pages_lock, flags); + if (list_empty(&blkif->free_pages)) { + BUG_ON(blkif->free_pages_num != 0); + spin_unlock_irqrestore(&blkif->free_pages_lock, flags); + return alloc_xenballooned_pages(1, page, false); } + BUG_ON(blkif->free_pages_num == 0); + page[0] = list_first_entry(&blkif->free_pages, struct page, lru); + list_del(&page[0]->lru); + blkif->free_pages_num--; + spin_unlock_irqrestore(&blkif->free_pages_lock, flags); + return 0; } - -/* - * Little helpful macro to figure out the index and virtual address of the - * pending_pages[..]. For each 'pending_req' we have have up to - * BLKIF_MAX_SEGMENTS_PER_REQUEST (11) pages. The seg would be from 0 through - * 10 and would index in the pending_pages[..]. - */ -static inline int vaddr_pagenr(struct pending_req *req, int seg) +static inline void put_free_pages(struct xen_blkif *blkif, struct page **page, + int num) { - return (req - blkbk->pending_reqs) * - BLKIF_MAX_SEGMENTS_PER_REQUEST + seg; -} + unsigned long flags; + int i; -#define pending_page(req, seg) pending_pages[vaddr_pagenr(req, seg)] + spin_lock_irqsave(&blkif->free_pages_lock, flags); + for (i = 0; i < num; i++) + list_add(&page[i]->lru, &blkif->free_pages); + blkif->free_pages_num += num; + spin_unlock_irqrestore(&blkif->free_pages_lock, flags); +} -static inline unsigned long vaddr(struct pending_req *req, int seg) +static inline void shrink_free_pagepool(struct xen_blkif *blkif, int num) { - unsigned long pfn = page_to_pfn(blkbk->pending_page(req, seg)); - return (unsigned long)pfn_to_kaddr(pfn); -} + /* Remove requested pages in batches of NUM_BATCH_FREE_PAGES */ + struct page *page[NUM_BATCH_FREE_PAGES]; + unsigned int num_pages = 0; + unsigned long flags; -#define pending_handle(_req, _seg) \ - (blkbk->pending_grant_handles[vaddr_pagenr(_req, _seg)]) + spin_lock_irqsave(&blkif->free_pages_lock, flags); + while (blkif->free_pages_num > num) { + BUG_ON(list_empty(&blkif->free_pages)); + page[num_pages] = list_first_entry(&blkif->free_pages, + struct page, lru); + list_del(&page[num_pages]->lru); + blkif->free_pages_num--; + if (++num_pages == NUM_BATCH_FREE_PAGES) { + spin_unlock_irqrestore(&blkif->free_pages_lock, flags); + free_xenballooned_pages(num_pages, page); + spin_lock_irqsave(&blkif->free_pages_lock, flags); + num_pages = 0; + } + } + spin_unlock_irqrestore(&blkif->free_pages_lock, flags); + if (num_pages != 0) + free_xenballooned_pages(num_pages, page); +} +#define vaddr(page) ((unsigned long)pfn_to_kaddr(page_to_pfn(page))) static int do_block_io_op(struct xen_blkif *blkif); static int dispatch_rw_block_io(struct xen_blkif *blkif, @@ -170,13 +178,29 @@ static void make_response(struct xen_blkif *blkif, u64 id, (n) = (&(pos)->node != NULL) ? rb_next(&(pos)->node) : NULL) -static void add_persistent_gnt(struct rb_root *root, +/* + * We don't need locking around the persistent grant helpers + * because blkback uses a single-thread for each backed, so we + * can be sure that this functions will never be called recursively. + * + * The only exception to that is put_persistent_grant, that can be called + * from interrupt context (by xen_blkbk_unmap), so we have to use atomic + * bit operations to modify the flags of a persistent grant and to count + * the number of used grants. + */ +static int add_persistent_gnt(struct xen_blkif *blkif, struct persistent_gnt *persistent_gnt) { - struct rb_node **new = &(root->rb_node), *parent = NULL; + struct rb_node **new = NULL, *parent = NULL; struct persistent_gnt *this; + if (blkif->persistent_gnt_c >= xen_blkif_max_pgrants) { + if (!blkif->vbd.overflow_max_grants) + blkif->vbd.overflow_max_grants = 1; + return -EBUSY; + } /* Figure out where to put new node */ + new = &blkif->persistent_gnts.rb_node; while (*new) { this = container_of(*new, struct persistent_gnt, node); @@ -186,22 +210,28 @@ static void add_persistent_gnt(struct rb_root *root, else if (persistent_gnt->gnt > this->gnt) new = &((*new)->rb_right); else { - pr_alert(DRV_PFX " trying to add a gref that's already in the tree\n"); - BUG(); + pr_alert_ratelimited(DRV_PFX " trying to add a gref that's already in the tree\n"); + return -EINVAL; } } + bitmap_zero(persistent_gnt->flags, PERSISTENT_GNT_FLAGS_SIZE); + set_bit(PERSISTENT_GNT_ACTIVE, persistent_gnt->flags); /* Add new node and rebalance tree. */ rb_link_node(&(persistent_gnt->node), parent, new); - rb_insert_color(&(persistent_gnt->node), root); + rb_insert_color(&(persistent_gnt->node), &blkif->persistent_gnts); + blkif->persistent_gnt_c++; + atomic_inc(&blkif->persistent_gnt_in_use); + return 0; } -static struct persistent_gnt *get_persistent_gnt(struct rb_root *root, +static struct persistent_gnt *get_persistent_gnt(struct xen_blkif *blkif, grant_ref_t gref) { struct persistent_gnt *data; - struct rb_node *node = root->rb_node; + struct rb_node *node = NULL; + node = blkif->persistent_gnts.rb_node; while (node) { data = container_of(node, struct persistent_gnt, node); @@ -209,13 +239,31 @@ static struct persistent_gnt *get_persistent_gnt(struct rb_root *root, node = node->rb_left; else if (gref > data->gnt) node = node->rb_right; - else + else { + if(test_bit(PERSISTENT_GNT_ACTIVE, data->flags)) { + pr_alert_ratelimited(DRV_PFX " requesting a grant already in use\n"); + return NULL; + } + set_bit(PERSISTENT_GNT_ACTIVE, data->flags); + atomic_inc(&blkif->persistent_gnt_in_use); return data; + } } return NULL; } -static void free_persistent_gnts(struct rb_root *root, unsigned int num) +static void put_persistent_gnt(struct xen_blkif *blkif, + struct persistent_gnt *persistent_gnt) +{ + if(!test_bit(PERSISTENT_GNT_ACTIVE, persistent_gnt->flags)) + pr_alert_ratelimited(DRV_PFX " freeing a grant already unused"); + set_bit(PERSISTENT_GNT_WAS_ACTIVE, persistent_gnt->flags); + clear_bit(PERSISTENT_GNT_ACTIVE, persistent_gnt->flags); + atomic_dec(&blkif->persistent_gnt_in_use); +} + +static void free_persistent_gnts(struct xen_blkif *blkif, struct rb_root *root, + unsigned int num) { struct gnttab_unmap_grant_ref unmap[BLKIF_MAX_SEGMENTS_PER_REQUEST]; struct page *pages[BLKIF_MAX_SEGMENTS_PER_REQUEST]; @@ -240,7 +288,7 @@ static void free_persistent_gnts(struct rb_root *root, unsigned int num) ret = gnttab_unmap_refs(unmap, NULL, pages, segs_to_unmap); BUG_ON(ret); - free_xenballooned_pages(segs_to_unmap, pages); + put_free_pages(blkif, pages, segs_to_unmap); segs_to_unmap = 0; } @@ -251,21 +299,148 @@ static void free_persistent_gnts(struct rb_root *root, unsigned int num) BUG_ON(num != 0); } +static void unmap_purged_grants(struct work_struct *work) +{ + struct gnttab_unmap_grant_ref unmap[BLKIF_MAX_SEGMENTS_PER_REQUEST]; + struct page *pages[BLKIF_MAX_SEGMENTS_PER_REQUEST]; + struct persistent_gnt *persistent_gnt; + int ret, segs_to_unmap = 0; + struct xen_blkif *blkif = container_of(work, typeof(*blkif), persistent_purge_work); + + while(!list_empty(&blkif->persistent_purge_list)) { + persistent_gnt = list_first_entry(&blkif->persistent_purge_list, + struct persistent_gnt, + remove_node); + list_del(&persistent_gnt->remove_node); + + gnttab_set_unmap_op(&unmap[segs_to_unmap], + vaddr(persistent_gnt->page), + GNTMAP_host_map, + persistent_gnt->handle); + + pages[segs_to_unmap] = persistent_gnt->page; + + if (++segs_to_unmap == BLKIF_MAX_SEGMENTS_PER_REQUEST) { + ret = gnttab_unmap_refs(unmap, NULL, pages, + segs_to_unmap); + BUG_ON(ret); + put_free_pages(blkif, pages, segs_to_unmap); + segs_to_unmap = 0; + } + kfree(persistent_gnt); + } + if (segs_to_unmap > 0) { + ret = gnttab_unmap_refs(unmap, NULL, pages, segs_to_unmap); + BUG_ON(ret); + put_free_pages(blkif, pages, segs_to_unmap); + } +} + +static void purge_persistent_gnt(struct xen_blkif *blkif) +{ + struct persistent_gnt *persistent_gnt; + struct rb_node *n; + unsigned int num_clean, total; + bool scan_used = false, clean_used = false; + struct rb_root *root; + + if (blkif->persistent_gnt_c < xen_blkif_max_pgrants || + (blkif->persistent_gnt_c == xen_blkif_max_pgrants && + !blkif->vbd.overflow_max_grants)) { + return; + } + + if (work_pending(&blkif->persistent_purge_work)) { + pr_alert_ratelimited(DRV_PFX "Scheduled work from previous purge is still pending, cannot purge list\n"); + return; + } + + num_clean = (xen_blkif_max_pgrants / 100) * LRU_PERCENT_CLEAN; + num_clean = blkif->persistent_gnt_c - xen_blkif_max_pgrants + num_clean; + num_clean = min(blkif->persistent_gnt_c, num_clean); + if ((num_clean == 0) || + (num_clean > (blkif->persistent_gnt_c - atomic_read(&blkif->persistent_gnt_in_use)))) + return; + + /* + * At this point, we can assure that there will be no calls + * to get_persistent_grant (because we are executing this code from + * xen_blkif_schedule), there can only be calls to put_persistent_gnt, + * which means that the number of currently used grants will go down, + * but never up, so we will always be able to remove the requested + * number of grants. + */ + + total = num_clean; + + pr_debug(DRV_PFX "Going to purge %u persistent grants\n", num_clean); + + INIT_LIST_HEAD(&blkif->persistent_purge_list); + root = &blkif->persistent_gnts; +purge_list: + foreach_grant_safe(persistent_gnt, n, root, node) { + BUG_ON(persistent_gnt->handle == + BLKBACK_INVALID_HANDLE); + + if (clean_used) { + clear_bit(PERSISTENT_GNT_WAS_ACTIVE, persistent_gnt->flags); + continue; + } + + if (test_bit(PERSISTENT_GNT_ACTIVE, persistent_gnt->flags)) + continue; + if (!scan_used && + (test_bit(PERSISTENT_GNT_WAS_ACTIVE, persistent_gnt->flags))) + continue; + + rb_erase(&persistent_gnt->node, root); + list_add(&persistent_gnt->remove_node, + &blkif->persistent_purge_list); + if (--num_clean == 0) + goto finished; + } + /* + * If we get here it means we also need to start cleaning + * grants that were used since last purge in order to cope + * with the requested num + */ + if (!scan_used && !clean_used) { + pr_debug(DRV_PFX "Still missing %u purged frames\n", num_clean); + scan_used = true; + goto purge_list; + } +finished: + if (!clean_used) { + pr_debug(DRV_PFX "Finished scanning for grants to clean, removing used flag\n"); + clean_used = true; + goto purge_list; + } + + blkif->persistent_gnt_c -= (total - num_clean); + blkif->vbd.overflow_max_grants = 0; + + /* We can defer this work */ + INIT_WORK(&blkif->persistent_purge_work, unmap_purged_grants); + schedule_work(&blkif->persistent_purge_work); + pr_debug(DRV_PFX "Purged %u/%u\n", (total - num_clean), total); + return; +} + /* * Retrieve from the 'pending_reqs' a free pending_req structure to be used. */ -static struct pending_req *alloc_req(void) +static struct pending_req *alloc_req(struct xen_blkif *blkif) { struct pending_req *req = NULL; unsigned long flags; - spin_lock_irqsave(&blkbk->pending_free_lock, flags); - if (!list_empty(&blkbk->pending_free)) { - req = list_entry(blkbk->pending_free.next, struct pending_req, + spin_lock_irqsave(&blkif->pending_free_lock, flags); + if (!list_empty(&blkif->pending_free)) { + req = list_entry(blkif->pending_free.next, struct pending_req, free_list); list_del(&req->free_list); } - spin_unlock_irqrestore(&blkbk->pending_free_lock, flags); + spin_unlock_irqrestore(&blkif->pending_free_lock, flags); return req; } @@ -273,17 +448,17 @@ static struct pending_req *alloc_req(void) * Return the 'pending_req' structure back to the freepool. We also * wake up the thread if it was waiting for a free page. */ -static void free_req(struct pending_req *req) +static void free_req(struct xen_blkif *blkif, struct pending_req *req) { unsigned long flags; int was_empty; - spin_lock_irqsave(&blkbk->pending_free_lock, flags); - was_empty = list_empty(&blkbk->pending_free); - list_add(&req->free_list, &blkbk->pending_free); - spin_unlock_irqrestore(&blkbk->pending_free_lock, flags); + spin_lock_irqsave(&blkif->pending_free_lock, flags); + was_empty = list_empty(&blkif->pending_free); + list_add(&req->free_list, &blkif->pending_free); + spin_unlock_irqrestore(&blkif->pending_free_lock, flags); if (was_empty) - wake_up(&blkbk->pending_free_wq); + wake_up(&blkif->pending_free_wq); } /* @@ -382,10 +557,12 @@ irqreturn_t xen_blkif_be_int(int irq, void *dev_id) static void print_stats(struct xen_blkif *blkif) { pr_info("xen-blkback (%s): oo %3llu | rd %4llu | wr %4llu | f %4llu" - " | ds %4llu\n", + " | ds %4llu | pg: %4u/%4d\n", current->comm, blkif->st_oo_req, blkif->st_rd_req, blkif->st_wr_req, - blkif->st_f_req, blkif->st_ds_req); + blkif->st_f_req, blkif->st_ds_req, + blkif->persistent_gnt_c, + xen_blkif_max_pgrants); blkif->st_print = jiffies + msecs_to_jiffies(10 * 1000); blkif->st_rd_req = 0; blkif->st_wr_req = 0; @@ -397,6 +574,8 @@ int xen_blkif_schedule(void *arg) { struct xen_blkif *blkif = arg; struct xen_vbd *vbd = &blkif->vbd; + unsigned long timeout; + int ret; xen_blkif_get(blkif); @@ -406,27 +585,52 @@ int xen_blkif_schedule(void *arg) if (unlikely(vbd->size != vbd_sz(vbd))) xen_vbd_resize(blkif); - wait_event_interruptible( + timeout = msecs_to_jiffies(LRU_INTERVAL); + + timeout = wait_event_interruptible_timeout( blkif->wq, - blkif->waiting_reqs || kthread_should_stop()); - wait_event_interruptible( - blkbk->pending_free_wq, - !list_empty(&blkbk->pending_free) || - kthread_should_stop()); + blkif->waiting_reqs || kthread_should_stop(), + timeout); + if (timeout == 0) + goto purge_gnt_list; + timeout = wait_event_interruptible_timeout( + blkif->pending_free_wq, + !list_empty(&blkif->pending_free) || + kthread_should_stop(), + timeout); + if (timeout == 0) + goto purge_gnt_list; blkif->waiting_reqs = 0; smp_mb(); /* clear flag *before* checking for work */ - if (do_block_io_op(blkif)) + ret = do_block_io_op(blkif); + if (ret > 0) blkif->waiting_reqs = 1; + if (ret == -EACCES) + wait_event_interruptible(blkif->shutdown_wq, + kthread_should_stop()); + +purge_gnt_list: + if (blkif->vbd.feature_gnt_persistent && + time_after(jiffies, blkif->next_lru)) { + purge_persistent_gnt(blkif); + blkif->next_lru = jiffies + msecs_to_jiffies(LRU_INTERVAL); + } + + /* Shrink if we have more than xen_blkif_max_buffer_pages */ + shrink_free_pagepool(blkif, xen_blkif_max_buffer_pages); if (log_stats && time_after(jiffies, blkif->st_print)) print_stats(blkif); } + /* Since we are shutting down remove all pages from the buffer */ + shrink_free_pagepool(blkif, 0 /* All */); + /* Free all persistent grant pages */ if (!RB_EMPTY_ROOT(&blkif->persistent_gnts)) - free_persistent_gnts(&blkif->persistent_gnts, + free_persistent_gnts(blkif, &blkif->persistent_gnts, blkif->persistent_gnt_c); BUG_ON(!RB_EMPTY_ROOT(&blkif->persistent_gnts)); @@ -441,148 +645,98 @@ int xen_blkif_schedule(void *arg) return 0; } -struct seg_buf { - unsigned int offset; - unsigned int nsec; -}; /* * Unmap the grant references, and also remove the M2P over-rides * used in the 'pending_req'. */ -static void xen_blkbk_unmap(struct pending_req *req) +static void xen_blkbk_unmap(struct xen_blkif *blkif, + struct grant_page *pages[], + int num) { struct gnttab_unmap_grant_ref unmap[BLKIF_MAX_SEGMENTS_PER_REQUEST]; - struct page *pages[BLKIF_MAX_SEGMENTS_PER_REQUEST]; + struct page *unmap_pages[BLKIF_MAX_SEGMENTS_PER_REQUEST]; unsigned int i, invcount = 0; - grant_handle_t handle; int ret; - for (i = 0; i < req->nr_pages; i++) { - if (!test_bit(i, req->unmap_seg)) + for (i = 0; i < num; i++) { + if (pages[i]->persistent_gnt != NULL) { + put_persistent_gnt(blkif, pages[i]->persistent_gnt); continue; - handle = pending_handle(req, i); - if (handle == BLKBACK_INVALID_HANDLE) + } + if (pages[i]->handle == BLKBACK_INVALID_HANDLE) continue; - gnttab_set_unmap_op(&unmap[invcount], vaddr(req, i), - GNTMAP_host_map, handle); - pending_handle(req, i) = BLKBACK_INVALID_HANDLE; - pages[invcount] = virt_to_page(vaddr(req, i)); - invcount++; + unmap_pages[invcount] = pages[i]->page; + gnttab_set_unmap_op(&unmap[invcount], vaddr(pages[i]->page), + GNTMAP_host_map, pages[i]->handle); + pages[i]->handle = BLKBACK_INVALID_HANDLE; + if (++invcount == BLKIF_MAX_SEGMENTS_PER_REQUEST) { + ret = gnttab_unmap_refs(unmap, NULL, unmap_pages, + invcount); + BUG_ON(ret); + put_free_pages(blkif, unmap_pages, invcount); + invcount = 0; + } + } + if (invcount) { + ret = gnttab_unmap_refs(unmap, NULL, unmap_pages, invcount); + BUG_ON(ret); + put_free_pages(blkif, unmap_pages, invcount); } - - ret = gnttab_unmap_refs(unmap, NULL, pages, invcount); - BUG_ON(ret); } -static int xen_blkbk_map(struct blkif_request *req, - struct pending_req *pending_req, - struct seg_buf seg[], - struct page *pages[]) +static int xen_blkbk_map(struct xen_blkif *blkif, + struct grant_page *pages[], + int num, bool ro) { struct gnttab_map_grant_ref map[BLKIF_MAX_SEGMENTS_PER_REQUEST]; - struct persistent_gnt *persistent_gnts[BLKIF_MAX_SEGMENTS_PER_REQUEST]; struct page *pages_to_gnt[BLKIF_MAX_SEGMENTS_PER_REQUEST]; struct persistent_gnt *persistent_gnt = NULL; - struct xen_blkif *blkif = pending_req->blkif; phys_addr_t addr = 0; - int i, j; - bool new_map; - int nseg = req->u.rw.nr_segments; + int i, seg_idx, new_map_idx; int segs_to_map = 0; int ret = 0; + int last_map = 0, map_until = 0; int use_persistent_gnts; use_persistent_gnts = (blkif->vbd.feature_gnt_persistent); - BUG_ON(blkif->persistent_gnt_c > - max_mapped_grant_pages(pending_req->blkif->blk_protocol)); - /* * Fill out preq.nr_sects with proper amount of sectors, and setup * assign map[..] with the PFN of the page in our domain with the * corresponding grant reference for each page. */ - for (i = 0; i < nseg; i++) { +again: + for (i = map_until; i < num; i++) { uint32_t flags; if (use_persistent_gnts) persistent_gnt = get_persistent_gnt( - &blkif->persistent_gnts, - req->u.rw.seg[i].gref); + blkif, + pages[i]->gref); if (persistent_gnt) { /* * We are using persistent grants and * the grant is already mapped */ - new_map = false; - } else if (use_persistent_gnts && - blkif->persistent_gnt_c < - max_mapped_grant_pages(blkif->blk_protocol)) { - /* - * We are using persistent grants, the grant is - * not mapped but we have room for it - */ - new_map = true; - persistent_gnt = kmalloc( - sizeof(struct persistent_gnt), - GFP_KERNEL); - if (!persistent_gnt) - return -ENOMEM; - if (alloc_xenballooned_pages(1, &persistent_gnt->page, - false)) { - kfree(persistent_gnt); - return -ENOMEM; - } - persistent_gnt->gnt = req->u.rw.seg[i].gref; - persistent_gnt->handle = BLKBACK_INVALID_HANDLE; - - pages_to_gnt[segs_to_map] = - persistent_gnt->page; - addr = (unsigned long) pfn_to_kaddr( - page_to_pfn(persistent_gnt->page)); - - add_persistent_gnt(&blkif->persistent_gnts, - persistent_gnt); - blkif->persistent_gnt_c++; - pr_debug(DRV_PFX " grant %u added to the tree of persistent grants, using %u/%u\n", - persistent_gnt->gnt, blkif->persistent_gnt_c, - max_mapped_grant_pages(blkif->blk_protocol)); + pages[i]->page = persistent_gnt->page; + pages[i]->persistent_gnt = persistent_gnt; } else { - /* - * We are either using persistent grants and - * hit the maximum limit of grants mapped, - * or we are not using persistent grants. - */ - if (use_persistent_gnts && - !blkif->vbd.overflow_max_grants) { - blkif->vbd.overflow_max_grants = 1; - pr_alert(DRV_PFX " domain %u, device %#x is using maximum number of persistent grants\n", - blkif->domid, blkif->vbd.handle); - } - new_map = true; - pages[i] = blkbk->pending_page(pending_req, i); - addr = vaddr(pending_req, i); - pages_to_gnt[segs_to_map] = - blkbk->pending_page(pending_req, i); - } - - if (persistent_gnt) { - pages[i] = persistent_gnt->page; - persistent_gnts[i] = persistent_gnt; - } else { - persistent_gnts[i] = NULL; - } - - if (new_map) { + if (get_free_page(blkif, &pages[i]->page)) + goto out_of_memory; + addr = vaddr(pages[i]->page); + pages_to_gnt[segs_to_map] = pages[i]->page; + pages[i]->persistent_gnt = NULL; flags = GNTMAP_host_map; - if (!persistent_gnt && - (pending_req->operation != BLKIF_OP_READ)) + if (!use_persistent_gnts && ro) flags |= GNTMAP_readonly; gnttab_set_map_op(&map[segs_to_map++], addr, - flags, req->u.rw.seg[i].gref, + flags, pages[i]->gref, blkif->domid); } + map_until = i + 1; + if (segs_to_map == BLKIF_MAX_SEGMENTS_PER_REQUEST) + break; } if (segs_to_map) { @@ -595,49 +749,133 @@ static int xen_blkbk_map(struct blkif_request *req, * so that when we access vaddr(pending_req,i) it has the contents of * the page from the other domain. */ - bitmap_zero(pending_req->unmap_seg, BLKIF_MAX_SEGMENTS_PER_REQUEST); - for (i = 0, j = 0; i < nseg; i++) { - if (!persistent_gnts[i] || - persistent_gnts[i]->handle == BLKBACK_INVALID_HANDLE) { + for (seg_idx = last_map, new_map_idx = 0; seg_idx < map_until; seg_idx++) { + if (!pages[seg_idx]->persistent_gnt) { /* This is a newly mapped grant */ - BUG_ON(j >= segs_to_map); - if (unlikely(map[j].status != 0)) { + BUG_ON(new_map_idx >= segs_to_map); + if (unlikely(map[new_map_idx].status != 0)) { pr_debug(DRV_PFX "invalid buffer -- could not remap it\n"); - map[j].handle = BLKBACK_INVALID_HANDLE; + pages[seg_idx]->handle = BLKBACK_INVALID_HANDLE; ret |= 1; - if (persistent_gnts[i]) { - rb_erase(&persistent_gnts[i]->node, - &blkif->persistent_gnts); - blkif->persistent_gnt_c--; - kfree(persistent_gnts[i]); - persistent_gnts[i] = NULL; - } + goto next; } + pages[seg_idx]->handle = map[new_map_idx].handle; + } else { + continue; } - if (persistent_gnts[i]) { - if (persistent_gnts[i]->handle == - BLKBACK_INVALID_HANDLE) { + if (use_persistent_gnts && + blkif->persistent_gnt_c < xen_blkif_max_pgrants) { + /* + * We are using persistent grants, the grant is + * not mapped but we might have room for it. + */ + persistent_gnt = kmalloc(sizeof(struct persistent_gnt), + GFP_KERNEL); + if (!persistent_gnt) { /* - * If this is a new persistent grant - * save the handler + * If we don't have enough memory to + * allocate the persistent_gnt struct + * map this grant non-persistenly */ - persistent_gnts[i]->handle = map[j++].handle; + goto next; } - pending_handle(pending_req, i) = - persistent_gnts[i]->handle; + persistent_gnt->gnt = map[new_map_idx].ref; + persistent_gnt->handle = map[new_map_idx].handle; + persistent_gnt->page = pages[seg_idx]->page; + if (add_persistent_gnt(blkif, + persistent_gnt)) { + kfree(persistent_gnt); + persistent_gnt = NULL; + goto next; + } + pages[seg_idx]->persistent_gnt = persistent_gnt; + pr_debug(DRV_PFX " grant %u added to the tree of persistent grants, using %u/%u\n", + persistent_gnt->gnt, blkif->persistent_gnt_c, + xen_blkif_max_pgrants); + goto next; + } + if (use_persistent_gnts && !blkif->vbd.overflow_max_grants) { + blkif->vbd.overflow_max_grants = 1; + pr_debug(DRV_PFX " domain %u, device %#x is using maximum number of persistent grants\n", + blkif->domid, blkif->vbd.handle); + } + /* + * We could not map this grant persistently, so use it as + * a non-persistent grant. + */ +next: + new_map_idx++; + } + segs_to_map = 0; + last_map = map_until; + if (map_until != num) + goto again; - if (ret) - continue; - } else { - pending_handle(pending_req, i) = map[j++].handle; - bitmap_set(pending_req->unmap_seg, i, 1); + return ret; + +out_of_memory: + pr_alert(DRV_PFX "%s: out of memory\n", __func__); + put_free_pages(blkif, pages_to_gnt, segs_to_map); + return -ENOMEM; +} + +static int xen_blkbk_map_seg(struct pending_req *pending_req) +{ + int rc; + + rc = xen_blkbk_map(pending_req->blkif, pending_req->segments, + pending_req->nr_pages, + (pending_req->operation != BLKIF_OP_READ)); + + return rc; +} - if (ret) - continue; +static int xen_blkbk_parse_indirect(struct blkif_request *req, + struct pending_req *pending_req, + struct seg_buf seg[], + struct phys_req *preq) +{ + struct grant_page **pages = pending_req->indirect_pages; + struct xen_blkif *blkif = pending_req->blkif; + int indirect_grefs, rc, n, nseg, i; + struct blkif_request_segment_aligned *segments = NULL; + + nseg = pending_req->nr_pages; + indirect_grefs = INDIRECT_PAGES(nseg); + BUG_ON(indirect_grefs > BLKIF_MAX_INDIRECT_PAGES_PER_REQUEST); + + for (i = 0; i < indirect_grefs; i++) + pages[i]->gref = req->u.indirect.indirect_grefs[i]; + + rc = xen_blkbk_map(blkif, pages, indirect_grefs, true); + if (rc) + goto unmap; + + for (n = 0, i = 0; n < nseg; n++) { + if ((n % SEGS_PER_INDIRECT_FRAME) == 0) { + /* Map indirect segments */ + if (segments) + kunmap_atomic(segments); + segments = kmap_atomic(pages[n/SEGS_PER_INDIRECT_FRAME]->page); + } + i = n % SEGS_PER_INDIRECT_FRAME; + pending_req->segments[n]->gref = segments[i].gref; + seg[n].nsec = segments[i].last_sect - + segments[i].first_sect + 1; + seg[n].offset = (segments[i].first_sect << 9); + if ((segments[i].last_sect >= (PAGE_SIZE >> 9)) || + (segments[i].last_sect < segments[i].first_sect)) { + rc = -EINVAL; + goto unmap; } - seg[i].offset = (req->u.rw.seg[i].first_sect << 9); + preq->nr_sects += seg[n].nsec; } - return ret; + +unmap: + if (segments) + kunmap_atomic(segments); + xen_blkbk_unmap(blkif, pages, indirect_grefs); + return rc; } static int dispatch_discard_io(struct xen_blkif *blkif, @@ -647,7 +885,18 @@ static int dispatch_discard_io(struct xen_blkif *blkif, int status = BLKIF_RSP_OKAY; struct block_device *bdev = blkif->vbd.bdev; unsigned long secure; + struct phys_req preq; + + preq.sector_number = req->u.discard.sector_number; + preq.nr_sects = req->u.discard.nr_sectors; + err = xen_vbd_translate(&preq, blkif, WRITE); + if (err) { + pr_warn(DRV_PFX "access denied: DISCARD [%llu->%llu] on dev=%04x\n", + preq.sector_number, + preq.sector_number + preq.nr_sects, blkif->vbd.pdevice); + goto fail_response; + } blkif->st_ds_req++; xen_blkif_get(blkif); @@ -658,7 +907,7 @@ static int dispatch_discard_io(struct xen_blkif *blkif, err = blkdev_issue_discard(bdev, req->u.discard.sector_number, req->u.discard.nr_sectors, GFP_KERNEL, secure); - +fail_response: if (err == -EOPNOTSUPP) { pr_debug(DRV_PFX "discard op failed, not supported\n"); status = BLKIF_RSP_EOPNOTSUPP; @@ -674,7 +923,7 @@ static int dispatch_other_io(struct xen_blkif *blkif, struct blkif_request *req, struct pending_req *pending_req) { - free_req(pending_req); + free_req(blkif, pending_req); make_response(blkif, req->u.other.id, req->operation, BLKIF_RSP_EOPNOTSUPP); return -EIO; @@ -726,7 +975,9 @@ static void __end_block_io_op(struct pending_req *pending_req, int error) * the proper response on the ring. */ if (atomic_dec_and_test(&pending_req->pendcnt)) { - xen_blkbk_unmap(pending_req); + xen_blkbk_unmap(pending_req->blkif, + pending_req->segments, + pending_req->nr_pages); make_response(pending_req->blkif, pending_req->id, pending_req->operation, pending_req->status); xen_blkif_put(pending_req->blkif); @@ -734,7 +985,7 @@ static void __end_block_io_op(struct pending_req *pending_req, int error) if (atomic_read(&pending_req->blkif->drain)) complete(&pending_req->blkif->drain_complete); } - free_req(pending_req); + free_req(pending_req->blkif, pending_req); } } @@ -767,6 +1018,12 @@ __do_block_io_op(struct xen_blkif *blkif) rp = blk_rings->common.sring->req_prod; rmb(); /* Ensure we see queued requests up to 'rp'. */ + if (RING_REQUEST_PROD_OVERFLOW(&blk_rings->common, rp)) { + rc = blk_rings->common.rsp_prod_pvt; + pr_warn(DRV_PFX "Frontend provided bogus ring requests (%d - %d = %d). Halting ring processing on dev=%04x\n", + rp, rc, rp - rc, blkif->vbd.pdevice); + return -EACCES; + } while (rc != rp) { if (RING_REQUEST_CONS_OVERFLOW(&blk_rings->common, rc)) @@ -777,7 +1034,7 @@ __do_block_io_op(struct xen_blkif *blkif) break; } - pending_req = alloc_req(); + pending_req = alloc_req(blkif); if (NULL == pending_req) { blkif->st_oo_req++; more_to_do = 1; @@ -807,11 +1064,12 @@ __do_block_io_op(struct xen_blkif *blkif) case BLKIF_OP_WRITE: case BLKIF_OP_WRITE_BARRIER: case BLKIF_OP_FLUSH_DISKCACHE: + case BLKIF_OP_INDIRECT: if (dispatch_rw_block_io(blkif, &req, pending_req)) goto done; break; case BLKIF_OP_DISCARD: - free_req(pending_req); + free_req(blkif, pending_req); if (dispatch_discard_io(blkif, &req)) goto done; break; @@ -853,17 +1111,28 @@ static int dispatch_rw_block_io(struct xen_blkif *blkif, struct pending_req *pending_req) { struct phys_req preq; - struct seg_buf seg[BLKIF_MAX_SEGMENTS_PER_REQUEST]; + struct seg_buf *seg = pending_req->seg; unsigned int nseg; struct bio *bio = NULL; - struct bio *biolist[BLKIF_MAX_SEGMENTS_PER_REQUEST]; + struct bio **biolist = pending_req->biolist; int i, nbio = 0; int operation; struct blk_plug plug; bool drain = false; - struct page *pages[BLKIF_MAX_SEGMENTS_PER_REQUEST]; + struct grant_page **pages = pending_req->segments; + unsigned short req_operation; + + req_operation = req->operation == BLKIF_OP_INDIRECT ? + req->u.indirect.indirect_op : req->operation; + if ((req->operation == BLKIF_OP_INDIRECT) && + (req_operation != BLKIF_OP_READ) && + (req_operation != BLKIF_OP_WRITE)) { + pr_debug(DRV_PFX "Invalid indirect operation (%u)\n", + req_operation); + goto fail_response; + } - switch (req->operation) { + switch (req_operation) { case BLKIF_OP_READ: blkif->st_rd_req++; operation = READ; @@ -885,33 +1154,47 @@ static int dispatch_rw_block_io(struct xen_blkif *blkif, } /* Check that the number of segments is sane. */ - nseg = req->u.rw.nr_segments; + nseg = req->operation == BLKIF_OP_INDIRECT ? + req->u.indirect.nr_segments : req->u.rw.nr_segments; if (unlikely(nseg == 0 && operation != WRITE_FLUSH) || - unlikely(nseg > BLKIF_MAX_SEGMENTS_PER_REQUEST)) { + unlikely((req->operation != BLKIF_OP_INDIRECT) && + (nseg > BLKIF_MAX_SEGMENTS_PER_REQUEST)) || + unlikely((req->operation == BLKIF_OP_INDIRECT) && + (nseg > MAX_INDIRECT_SEGMENTS))) { pr_debug(DRV_PFX "Bad number of segments in request (%d)\n", nseg); /* Haven't submitted any bio's yet. */ goto fail_response; } - preq.sector_number = req->u.rw.sector_number; preq.nr_sects = 0; pending_req->blkif = blkif; pending_req->id = req->u.rw.id; - pending_req->operation = req->operation; + pending_req->operation = req_operation; pending_req->status = BLKIF_RSP_OKAY; pending_req->nr_pages = nseg; - for (i = 0; i < nseg; i++) { - seg[i].nsec = req->u.rw.seg[i].last_sect - - req->u.rw.seg[i].first_sect + 1; - if ((req->u.rw.seg[i].last_sect >= (PAGE_SIZE >> 9)) || - (req->u.rw.seg[i].last_sect < req->u.rw.seg[i].first_sect)) + if (req->operation != BLKIF_OP_INDIRECT) { + preq.dev = req->u.rw.handle; + preq.sector_number = req->u.rw.sector_number; + for (i = 0; i < nseg; i++) { + pages[i]->gref = req->u.rw.seg[i].gref; + seg[i].nsec = req->u.rw.seg[i].last_sect - + req->u.rw.seg[i].first_sect + 1; + seg[i].offset = (req->u.rw.seg[i].first_sect << 9); + if ((req->u.rw.seg[i].last_sect >= (PAGE_SIZE >> 9)) || + (req->u.rw.seg[i].last_sect < + req->u.rw.seg[i].first_sect)) + goto fail_response; + preq.nr_sects += seg[i].nsec; + } + } else { + preq.dev = req->u.indirect.handle; + preq.sector_number = req->u.indirect.sector_number; + if (xen_blkbk_parse_indirect(req, pending_req, seg, &preq)) goto fail_response; - preq.nr_sects += seg[i].nsec; - } if (xen_vbd_translate(&preq, blkif, operation) != 0) { @@ -948,7 +1231,7 @@ static int dispatch_rw_block_io(struct xen_blkif *blkif, * the hypercall to unmap the grants - that is all done in * xen_blkbk_unmap. */ - if (xen_blkbk_map(req, pending_req, seg, pages)) + if (xen_blkbk_map_seg(pending_req)) goto fail_flush; /* @@ -960,11 +1243,12 @@ static int dispatch_rw_block_io(struct xen_blkif *blkif, for (i = 0; i < nseg; i++) { while ((bio == NULL) || (bio_add_page(bio, - pages[i], + pages[i]->page, seg[i].nsec << 9, seg[i].offset) == 0)) { - bio = bio_alloc(GFP_KERNEL, nseg-i); + int nr_iovecs = min_t(int, (nseg-i), BIO_MAX_PAGES); + bio = bio_alloc(GFP_KERNEL, nr_iovecs); if (unlikely(bio == NULL)) goto fail_put_bio; @@ -1009,11 +1293,12 @@ static int dispatch_rw_block_io(struct xen_blkif *blkif, return 0; fail_flush: - xen_blkbk_unmap(pending_req); + xen_blkbk_unmap(blkif, pending_req->segments, + pending_req->nr_pages); fail_response: /* Haven't submitted any bio's yet. */ - make_response(blkif, req->u.rw.id, req->operation, BLKIF_RSP_ERROR); - free_req(pending_req); + make_response(blkif, req->u.rw.id, req_operation, BLKIF_RSP_ERROR); + free_req(blkif, pending_req); msleep(1); /* back off a bit */ return -EIO; @@ -1070,73 +1355,20 @@ static void make_response(struct xen_blkif *blkif, u64 id, static int __init xen_blkif_init(void) { - int i, mmap_pages; int rc = 0; if (!xen_domain()) return -ENODEV; - blkbk = kzalloc(sizeof(struct xen_blkbk), GFP_KERNEL); - if (!blkbk) { - pr_alert(DRV_PFX "%s: out of memory!\n", __func__); - return -ENOMEM; - } - - mmap_pages = xen_blkif_reqs * BLKIF_MAX_SEGMENTS_PER_REQUEST; - - blkbk->pending_reqs = kzalloc(sizeof(blkbk->pending_reqs[0]) * - xen_blkif_reqs, GFP_KERNEL); - blkbk->pending_grant_handles = kmalloc(sizeof(blkbk->pending_grant_handles[0]) * - mmap_pages, GFP_KERNEL); - blkbk->pending_pages = kzalloc(sizeof(blkbk->pending_pages[0]) * - mmap_pages, GFP_KERNEL); - - if (!blkbk->pending_reqs || !blkbk->pending_grant_handles || - !blkbk->pending_pages) { - rc = -ENOMEM; - goto out_of_memory; - } - - for (i = 0; i < mmap_pages; i++) { - blkbk->pending_grant_handles[i] = BLKBACK_INVALID_HANDLE; - blkbk->pending_pages[i] = alloc_page(GFP_KERNEL); - if (blkbk->pending_pages[i] == NULL) { - rc = -ENOMEM; - goto out_of_memory; - } - } rc = xen_blkif_interface_init(); if (rc) goto failed_init; - INIT_LIST_HEAD(&blkbk->pending_free); - spin_lock_init(&blkbk->pending_free_lock); - init_waitqueue_head(&blkbk->pending_free_wq); - - for (i = 0; i < xen_blkif_reqs; i++) - list_add_tail(&blkbk->pending_reqs[i].free_list, - &blkbk->pending_free); - rc = xen_blkif_xenbus_init(); if (rc) goto failed_init; - return 0; - - out_of_memory: - pr_alert(DRV_PFX "%s: out of memory\n", __func__); failed_init: - kfree(blkbk->pending_reqs); - kfree(blkbk->pending_grant_handles); - if (blkbk->pending_pages) { - for (i = 0; i < mmap_pages; i++) { - if (blkbk->pending_pages[i]) - __free_page(blkbk->pending_pages[i]); - } - kfree(blkbk->pending_pages); - } - kfree(blkbk); - blkbk = NULL; return rc; } diff --git a/drivers/block/xen-blkback/common.h b/drivers/block/xen-blkback/common.h index 60103e2517ba..8d8807563d99 100644 --- a/drivers/block/xen-blkback/common.h +++ b/drivers/block/xen-blkback/common.h @@ -50,6 +50,19 @@ __func__, __LINE__, ##args) +/* + * This is the maximum number of segments that would be allowed in indirect + * requests. This value will also be passed to the frontend. + */ +#define MAX_INDIRECT_SEGMENTS 256 + +#define SEGS_PER_INDIRECT_FRAME \ + (PAGE_SIZE/sizeof(struct blkif_request_segment_aligned)) +#define MAX_INDIRECT_PAGES \ + ((MAX_INDIRECT_SEGMENTS + SEGS_PER_INDIRECT_FRAME - 1)/SEGS_PER_INDIRECT_FRAME) +#define INDIRECT_PAGES(_segs) \ + ((_segs + SEGS_PER_INDIRECT_FRAME - 1)/SEGS_PER_INDIRECT_FRAME) + /* Not a real protocol. Used to generate ring structs which contain * the elements common to all protocols only. This way we get a * compiler-checkable way to use common struct elements, so we can @@ -83,12 +96,31 @@ struct blkif_x86_32_request_other { uint64_t id; /* private guest value, echoed in resp */ } __attribute__((__packed__)); +struct blkif_x86_32_request_indirect { + uint8_t indirect_op; + uint16_t nr_segments; + uint64_t id; + blkif_sector_t sector_number; + blkif_vdev_t handle; + uint16_t _pad1; + grant_ref_t indirect_grefs[BLKIF_MAX_INDIRECT_PAGES_PER_REQUEST]; + /* + * The maximum number of indirect segments (and pages) that will + * be used is determined by MAX_INDIRECT_SEGMENTS, this value + * is also exported to the guest (via xenstore + * feature-max-indirect-segments entry), so the frontend knows how + * many indirect segments the backend supports. + */ + uint64_t _pad2; /* make it 64 byte aligned */ +} __attribute__((__packed__)); + struct blkif_x86_32_request { uint8_t operation; /* BLKIF_OP_??? */ union { struct blkif_x86_32_request_rw rw; struct blkif_x86_32_request_discard discard; struct blkif_x86_32_request_other other; + struct blkif_x86_32_request_indirect indirect; } u; } __attribute__((__packed__)); @@ -127,12 +159,32 @@ struct blkif_x86_64_request_other { uint64_t id; /* private guest value, echoed in resp */ } __attribute__((__packed__)); +struct blkif_x86_64_request_indirect { + uint8_t indirect_op; + uint16_t nr_segments; + uint32_t _pad1; /* offsetof(blkif_..,u.indirect.id)==8 */ + uint64_t id; + blkif_sector_t sector_number; + blkif_vdev_t handle; + uint16_t _pad2; + grant_ref_t indirect_grefs[BLKIF_MAX_INDIRECT_PAGES_PER_REQUEST]; + /* + * The maximum number of indirect segments (and pages) that will + * be used is determined by MAX_INDIRECT_SEGMENTS, this value + * is also exported to the guest (via xenstore + * feature-max-indirect-segments entry), so the frontend knows how + * many indirect segments the backend supports. + */ + uint32_t _pad3; /* make it 64 byte aligned */ +} __attribute__((__packed__)); + struct blkif_x86_64_request { uint8_t operation; /* BLKIF_OP_??? */ union { struct blkif_x86_64_request_rw rw; struct blkif_x86_64_request_discard discard; struct blkif_x86_64_request_other other; + struct blkif_x86_64_request_indirect indirect; } u; } __attribute__((__packed__)); @@ -182,12 +234,26 @@ struct xen_vbd { struct backend_info; +/* Number of available flags */ +#define PERSISTENT_GNT_FLAGS_SIZE 2 +/* This persistent grant is currently in use */ +#define PERSISTENT_GNT_ACTIVE 0 +/* + * This persistent grant has been used, this flag is set when we remove the + * PERSISTENT_GNT_ACTIVE, to know that this grant has been used recently. + */ +#define PERSISTENT_GNT_WAS_ACTIVE 1 + +/* Number of requests that we can fit in a ring */ +#define XEN_BLKIF_REQS 32 struct persistent_gnt { struct page *page; grant_ref_t gnt; grant_handle_t handle; + DECLARE_BITMAP(flags, PERSISTENT_GNT_FLAGS_SIZE); struct rb_node node; + struct list_head remove_node; }; struct xen_blkif { @@ -219,6 +285,23 @@ struct xen_blkif { /* tree to store persistent grants */ struct rb_root persistent_gnts; unsigned int persistent_gnt_c; + atomic_t persistent_gnt_in_use; + unsigned long next_lru; + + /* used by the kworker that offload work from the persistent purge */ + struct list_head persistent_purge_list; + struct work_struct persistent_purge_work; + + /* buffer of free pages to map grant refs */ + spinlock_t free_pages_lock; + int free_pages_num; + struct list_head free_pages; + + /* List of all 'pending_req' available */ + struct list_head pending_free; + /* And its spinlock. */ + spinlock_t pending_free_lock; + wait_queue_head_t pending_free_wq; /* statistics */ unsigned long st_print; @@ -231,6 +314,41 @@ struct xen_blkif { unsigned long long st_wr_sect; wait_queue_head_t waiting_to_free; + /* Thread shutdown wait queue. */ + wait_queue_head_t shutdown_wq; +}; + +struct seg_buf { + unsigned long offset; + unsigned int nsec; +}; + +struct grant_page { + struct page *page; + struct persistent_gnt *persistent_gnt; + grant_handle_t handle; + grant_ref_t gref; +}; + +/* + * Each outstanding request that we've passed to the lower device layers has a + * 'pending_req' allocated to it. Each buffer_head that completes decrements + * the pendcnt towards zero. When it hits zero, the specified domain has a + * response queued for it, with the saved 'id' passed back. + */ +struct pending_req { + struct xen_blkif *blkif; + u64 id; + int nr_pages; + atomic_t pendcnt; + unsigned short operation; + int status; + struct list_head free_list; + struct grant_page *segments[MAX_INDIRECT_SEGMENTS]; + /* Indirect descriptors */ + struct grant_page *indirect_pages[MAX_INDIRECT_PAGES]; + struct seg_buf seg[MAX_INDIRECT_SEGMENTS]; + struct bio *biolist[MAX_INDIRECT_SEGMENTS]; }; @@ -257,6 +375,7 @@ int xen_blkif_xenbus_init(void); irqreturn_t xen_blkif_be_int(int irq, void *dev_id); int xen_blkif_schedule(void *arg); +int xen_blkif_purge_persistent(void *arg); int xen_blkbk_flush_diskcache(struct xenbus_transaction xbt, struct backend_info *be, int state); @@ -268,7 +387,7 @@ struct xenbus_device *xen_blkbk_xenbus(struct backend_info *be); static inline void blkif_get_x86_32_req(struct blkif_request *dst, struct blkif_x86_32_request *src) { - int i, n = BLKIF_MAX_SEGMENTS_PER_REQUEST; + int i, n = BLKIF_MAX_SEGMENTS_PER_REQUEST, j; dst->operation = src->operation; switch (src->operation) { case BLKIF_OP_READ: @@ -291,6 +410,18 @@ static inline void blkif_get_x86_32_req(struct blkif_request *dst, dst->u.discard.sector_number = src->u.discard.sector_number; dst->u.discard.nr_sectors = src->u.discard.nr_sectors; break; + case BLKIF_OP_INDIRECT: + dst->u.indirect.indirect_op = src->u.indirect.indirect_op; + dst->u.indirect.nr_segments = src->u.indirect.nr_segments; + dst->u.indirect.handle = src->u.indirect.handle; + dst->u.indirect.id = src->u.indirect.id; + dst->u.indirect.sector_number = src->u.indirect.sector_number; + barrier(); + j = min(MAX_INDIRECT_PAGES, INDIRECT_PAGES(dst->u.indirect.nr_segments)); + for (i = 0; i < j; i++) + dst->u.indirect.indirect_grefs[i] = + src->u.indirect.indirect_grefs[i]; + break; default: /* * Don't know how to translate this op. Only get the @@ -304,7 +435,7 @@ static inline void blkif_get_x86_32_req(struct blkif_request *dst, static inline void blkif_get_x86_64_req(struct blkif_request *dst, struct blkif_x86_64_request *src) { - int i, n = BLKIF_MAX_SEGMENTS_PER_REQUEST; + int i, n = BLKIF_MAX_SEGMENTS_PER_REQUEST, j; dst->operation = src->operation; switch (src->operation) { case BLKIF_OP_READ: @@ -327,6 +458,18 @@ static inline void blkif_get_x86_64_req(struct blkif_request *dst, dst->u.discard.sector_number = src->u.discard.sector_number; dst->u.discard.nr_sectors = src->u.discard.nr_sectors; break; + case BLKIF_OP_INDIRECT: + dst->u.indirect.indirect_op = src->u.indirect.indirect_op; + dst->u.indirect.nr_segments = src->u.indirect.nr_segments; + dst->u.indirect.handle = src->u.indirect.handle; + dst->u.indirect.id = src->u.indirect.id; + dst->u.indirect.sector_number = src->u.indirect.sector_number; + barrier(); + j = min(MAX_INDIRECT_PAGES, INDIRECT_PAGES(dst->u.indirect.nr_segments)); + for (i = 0; i < j; i++) + dst->u.indirect.indirect_grefs[i] = + src->u.indirect.indirect_grefs[i]; + break; default: /* * Don't know how to translate this op. Only get the diff --git a/drivers/block/xen-blkback/xenbus.c b/drivers/block/xen-blkback/xenbus.c index 04608a6502d7..fe5c3cd10c34 100644 --- a/drivers/block/xen-blkback/xenbus.c +++ b/drivers/block/xen-blkback/xenbus.c @@ -98,12 +98,17 @@ static void xen_update_blkif_status(struct xen_blkif *blkif) err = PTR_ERR(blkif->xenblkd); blkif->xenblkd = NULL; xenbus_dev_error(blkif->be->dev, err, "start xenblkd"); + return; } } static struct xen_blkif *xen_blkif_alloc(domid_t domid) { struct xen_blkif *blkif; + struct pending_req *req, *n; + int i, j; + + BUILD_BUG_ON(MAX_INDIRECT_PAGES > BLKIF_MAX_INDIRECT_PAGES_PER_REQUEST); blkif = kmem_cache_zalloc(xen_blkif_cachep, GFP_KERNEL); if (!blkif) @@ -118,8 +123,57 @@ static struct xen_blkif *xen_blkif_alloc(domid_t domid) blkif->st_print = jiffies; init_waitqueue_head(&blkif->waiting_to_free); blkif->persistent_gnts.rb_node = NULL; + spin_lock_init(&blkif->free_pages_lock); + INIT_LIST_HEAD(&blkif->free_pages); + blkif->free_pages_num = 0; + atomic_set(&blkif->persistent_gnt_in_use, 0); + + INIT_LIST_HEAD(&blkif->pending_free); + + for (i = 0; i < XEN_BLKIF_REQS; i++) { + req = kzalloc(sizeof(*req), GFP_KERNEL); + if (!req) + goto fail; + list_add_tail(&req->free_list, + &blkif->pending_free); + for (j = 0; j < MAX_INDIRECT_SEGMENTS; j++) { + req->segments[j] = kzalloc(sizeof(*req->segments[0]), + GFP_KERNEL); + if (!req->segments[j]) + goto fail; + } + for (j = 0; j < MAX_INDIRECT_PAGES; j++) { + req->indirect_pages[j] = kzalloc(sizeof(*req->indirect_pages[0]), + GFP_KERNEL); + if (!req->indirect_pages[j]) + goto fail; + } + } + spin_lock_init(&blkif->pending_free_lock); + init_waitqueue_head(&blkif->pending_free_wq); + init_waitqueue_head(&blkif->shutdown_wq); return blkif; + +fail: + list_for_each_entry_safe(req, n, &blkif->pending_free, free_list) { + list_del(&req->free_list); + for (j = 0; j < MAX_INDIRECT_SEGMENTS; j++) { + if (!req->segments[j]) + break; + kfree(req->segments[j]); + } + for (j = 0; j < MAX_INDIRECT_PAGES; j++) { + if (!req->indirect_pages[j]) + break; + kfree(req->indirect_pages[j]); + } + kfree(req); + } + + kmem_cache_free(xen_blkif_cachep, blkif); + + return ERR_PTR(-ENOMEM); } static int xen_blkif_map(struct xen_blkif *blkif, unsigned long shared_page, @@ -178,6 +232,7 @@ static void xen_blkif_disconnect(struct xen_blkif *blkif) { if (blkif->xenblkd) { kthread_stop(blkif->xenblkd); + wake_up(&blkif->shutdown_wq); blkif->xenblkd = NULL; } @@ -198,8 +253,28 @@ static void xen_blkif_disconnect(struct xen_blkif *blkif) static void xen_blkif_free(struct xen_blkif *blkif) { + struct pending_req *req, *n; + int i = 0, j; + if (!atomic_dec_and_test(&blkif->refcnt)) BUG(); + + /* Check that there is no request in use */ + list_for_each_entry_safe(req, n, &blkif->pending_free, free_list) { + list_del(&req->free_list); + + for (j = 0; j < MAX_INDIRECT_SEGMENTS; j++) + kfree(req->segments[j]); + + for (j = 0; j < MAX_INDIRECT_PAGES; j++) + kfree(req->indirect_pages[j]); + + kfree(req); + i++; + } + + WARN_ON(i != XEN_BLKIF_REQS); + kmem_cache_free(xen_blkif_cachep, blkif); } @@ -678,6 +753,11 @@ again: dev->nodename); goto abort; } + err = xenbus_printf(xbt, dev->nodename, "feature-max-indirect-segments", "%u", + MAX_INDIRECT_SEGMENTS); + if (err) + dev_warn(&dev->dev, "writing %s/feature-max-indirect-segments (%d)", + dev->nodename, err); err = xenbus_printf(xbt, dev->nodename, "sectors", "%llu", (unsigned long long)vbd_sz(&be->blkif->vbd)); @@ -704,6 +784,11 @@ again: dev->nodename); goto abort; } + err = xenbus_printf(xbt, dev->nodename, "physical-sector-size", "%u", + bdev_physical_block_size(be->blkif->vbd.bdev)); + if (err) + xenbus_dev_error(dev, err, "writing %s/physical-sector-size", + dev->nodename); err = xenbus_transaction_end(xbt, 0); if (err == -EAGAIN) diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c index d89ef86220f4..a4660bbee8a6 100644 --- a/drivers/block/xen-blkfront.c +++ b/drivers/block/xen-blkfront.c @@ -74,12 +74,30 @@ struct grant { struct blk_shadow { struct blkif_request req; struct request *request; - struct grant *grants_used[BLKIF_MAX_SEGMENTS_PER_REQUEST]; + struct grant **grants_used; + struct grant **indirect_grants; + struct scatterlist *sg; +}; + +struct split_bio { + struct bio *bio; + atomic_t pending; + int err; }; static DEFINE_MUTEX(blkfront_mutex); static const struct block_device_operations xlvbd_block_fops; +/* + * Maximum number of segments in indirect requests, the actual value used by + * the frontend driver is the minimum of this value and the value provided + * by the backend driver. + */ + +static unsigned int xen_blkif_max_segments = 32; +module_param_named(max, xen_blkif_max_segments, int, S_IRUGO); +MODULE_PARM_DESC(max, "Maximum amount of segments in indirect requests (default is 32)"); + #define BLK_RING_SIZE __CONST_RING_SIZE(blkif, PAGE_SIZE) /* @@ -98,7 +116,6 @@ struct blkfront_info enum blkif_state connected; int ring_ref; struct blkif_front_ring ring; - struct scatterlist sg[BLKIF_MAX_SEGMENTS_PER_REQUEST]; unsigned int evtchn, irq; struct request_queue *rq; struct work_struct work; @@ -114,6 +131,7 @@ struct blkfront_info unsigned int discard_granularity; unsigned int discard_alignment; unsigned int feature_persistent:1; + unsigned int max_indirect_segments; int is_ready; }; @@ -142,6 +160,13 @@ static DEFINE_SPINLOCK(minor_lock); #define DEV_NAME "xvd" /* name in /dev */ +#define SEGS_PER_INDIRECT_FRAME \ + (PAGE_SIZE/sizeof(struct blkif_request_segment_aligned)) +#define INDIRECT_GREFS(_segs) \ + ((_segs + SEGS_PER_INDIRECT_FRAME - 1)/SEGS_PER_INDIRECT_FRAME) + +static int blkfront_setup_indirect(struct blkfront_info *info); + static int get_id_from_freelist(struct blkfront_info *info) { unsigned long free = info->shadow_free; @@ -358,7 +383,8 @@ static int blkif_queue_request(struct request *req) struct blkif_request *ring_req; unsigned long id; unsigned int fsect, lsect; - int i, ref; + int i, ref, n; + struct blkif_request_segment_aligned *segments = NULL; /* * Used to store if we are able to queue the request by just using @@ -369,21 +395,27 @@ static int blkif_queue_request(struct request *req) grant_ref_t gref_head; struct grant *gnt_list_entry = NULL; struct scatterlist *sg; + int nseg, max_grefs; if (unlikely(info->connected != BLKIF_STATE_CONNECTED)) return 1; - /* Check if we have enought grants to allocate a requests */ - if (info->persistent_gnts_c < BLKIF_MAX_SEGMENTS_PER_REQUEST) { + max_grefs = info->max_indirect_segments ? + info->max_indirect_segments + + INDIRECT_GREFS(info->max_indirect_segments) : + BLKIF_MAX_SEGMENTS_PER_REQUEST; + + /* Check if we have enough grants to allocate a requests */ + if (info->persistent_gnts_c < max_grefs) { new_persistent_gnts = 1; if (gnttab_alloc_grant_references( - BLKIF_MAX_SEGMENTS_PER_REQUEST - info->persistent_gnts_c, + max_grefs - info->persistent_gnts_c, &gref_head) < 0) { gnttab_request_free_callback( &info->callback, blkif_restart_queue_callback, info, - BLKIF_MAX_SEGMENTS_PER_REQUEST); + max_grefs); return 1; } } else @@ -394,42 +426,67 @@ static int blkif_queue_request(struct request *req) id = get_id_from_freelist(info); info->shadow[id].request = req; - ring_req->u.rw.id = id; - ring_req->u.rw.sector_number = (blkif_sector_t)blk_rq_pos(req); - ring_req->u.rw.handle = info->handle; - - ring_req->operation = rq_data_dir(req) ? - BLKIF_OP_WRITE : BLKIF_OP_READ; - - if (req->cmd_flags & (REQ_FLUSH | REQ_FUA)) { - /* - * Ideally we can do an unordered flush-to-disk. In case the - * backend onlysupports barriers, use that. A barrier request - * a superset of FUA, so we can implement it the same - * way. (It's also a FLUSH+FUA, since it is - * guaranteed ordered WRT previous writes.) - */ - ring_req->operation = info->flush_op; - } - if (unlikely(req->cmd_flags & (REQ_DISCARD | REQ_SECURE))) { - /* id, sector_number and handle are set above. */ ring_req->operation = BLKIF_OP_DISCARD; ring_req->u.discard.nr_sectors = blk_rq_sectors(req); + ring_req->u.discard.id = id; + ring_req->u.discard.sector_number = (blkif_sector_t)blk_rq_pos(req); if ((req->cmd_flags & REQ_SECURE) && info->feature_secdiscard) ring_req->u.discard.flag = BLKIF_DISCARD_SECURE; else ring_req->u.discard.flag = 0; } else { - ring_req->u.rw.nr_segments = blk_rq_map_sg(req->q, req, - info->sg); - BUG_ON(ring_req->u.rw.nr_segments > - BLKIF_MAX_SEGMENTS_PER_REQUEST); - - for_each_sg(info->sg, sg, ring_req->u.rw.nr_segments, i) { + BUG_ON(info->max_indirect_segments == 0 && + req->nr_phys_segments > BLKIF_MAX_SEGMENTS_PER_REQUEST); + BUG_ON(info->max_indirect_segments && + req->nr_phys_segments > info->max_indirect_segments); + nseg = blk_rq_map_sg(req->q, req, info->shadow[id].sg); + ring_req->u.rw.id = id; + if (nseg > BLKIF_MAX_SEGMENTS_PER_REQUEST) { + /* + * The indirect operation can only be a BLKIF_OP_READ or + * BLKIF_OP_WRITE + */ + BUG_ON(req->cmd_flags & (REQ_FLUSH | REQ_FUA)); + ring_req->operation = BLKIF_OP_INDIRECT; + ring_req->u.indirect.indirect_op = rq_data_dir(req) ? + BLKIF_OP_WRITE : BLKIF_OP_READ; + ring_req->u.indirect.sector_number = (blkif_sector_t)blk_rq_pos(req); + ring_req->u.indirect.handle = info->handle; + ring_req->u.indirect.nr_segments = nseg; + } else { + ring_req->u.rw.sector_number = (blkif_sector_t)blk_rq_pos(req); + ring_req->u.rw.handle = info->handle; + ring_req->operation = rq_data_dir(req) ? + BLKIF_OP_WRITE : BLKIF_OP_READ; + if (req->cmd_flags & (REQ_FLUSH | REQ_FUA)) { + /* + * Ideally we can do an unordered flush-to-disk. In case the + * backend onlysupports barriers, use that. A barrier request + * a superset of FUA, so we can implement it the same + * way. (It's also a FLUSH+FUA, since it is + * guaranteed ordered WRT previous writes.) + */ + ring_req->operation = info->flush_op; + } + ring_req->u.rw.nr_segments = nseg; + } + for_each_sg(info->shadow[id].sg, sg, nseg, i) { fsect = sg->offset >> 9; lsect = fsect + (sg->length >> 9) - 1; + if ((ring_req->operation == BLKIF_OP_INDIRECT) && + (i % SEGS_PER_INDIRECT_FRAME == 0)) { + if (segments) + kunmap_atomic(segments); + + n = i / SEGS_PER_INDIRECT_FRAME; + gnt_list_entry = get_grant(&gref_head, info); + info->shadow[id].indirect_grants[n] = gnt_list_entry; + segments = kmap_atomic(pfn_to_page(gnt_list_entry->pfn)); + ring_req->u.indirect.indirect_grefs[n] = gnt_list_entry->gref; + } + gnt_list_entry = get_grant(&gref_head, info); ref = gnt_list_entry->gref; @@ -441,8 +498,7 @@ static int blkif_queue_request(struct request *req) BUG_ON(sg->offset + sg->length > PAGE_SIZE); - shared_data = kmap_atomic( - pfn_to_page(gnt_list_entry->pfn)); + shared_data = kmap_atomic(pfn_to_page(gnt_list_entry->pfn)); bvec_data = kmap_atomic(sg_page(sg)); /* @@ -461,13 +517,23 @@ static int blkif_queue_request(struct request *req) kunmap_atomic(bvec_data); kunmap_atomic(shared_data); } - - ring_req->u.rw.seg[i] = - (struct blkif_request_segment) { - .gref = ref, - .first_sect = fsect, - .last_sect = lsect }; + if (ring_req->operation != BLKIF_OP_INDIRECT) { + ring_req->u.rw.seg[i] = + (struct blkif_request_segment) { + .gref = ref, + .first_sect = fsect, + .last_sect = lsect }; + } else { + n = i % SEGS_PER_INDIRECT_FRAME; + segments[n] = + (struct blkif_request_segment_aligned) { + .gref = ref, + .first_sect = fsect, + .last_sect = lsect }; + } } + if (segments) + kunmap_atomic(segments); } info->ring.req_prod_pvt++; @@ -542,7 +608,9 @@ wait: flush_requests(info); } -static int xlvbd_init_blk_queue(struct gendisk *gd, u16 sector_size) +static int xlvbd_init_blk_queue(struct gendisk *gd, u16 sector_size, + unsigned int physical_sector_size, + unsigned int segments) { struct request_queue *rq; struct blkfront_info *info = gd->private_data; @@ -564,14 +632,15 @@ static int xlvbd_init_blk_queue(struct gendisk *gd, u16 sector_size) /* Hard sector size and max sectors impersonate the equiv. hardware. */ blk_queue_logical_block_size(rq, sector_size); - blk_queue_max_hw_sectors(rq, 512); + blk_queue_physical_block_size(rq, physical_sector_size); + blk_queue_max_hw_sectors(rq, (segments * PAGE_SIZE) / 512); /* Each segment in a request is up to an aligned page in size. */ blk_queue_segment_boundary(rq, PAGE_SIZE - 1); blk_queue_max_segment_size(rq, PAGE_SIZE); /* Ensure a merged request will fit in a single I/O ring slot. */ - blk_queue_max_segments(rq, BLKIF_MAX_SEGMENTS_PER_REQUEST); + blk_queue_max_segments(rq, segments); /* Make sure buffer addresses are sector-aligned. */ blk_queue_dma_alignment(rq, 511); @@ -588,13 +657,16 @@ static int xlvbd_init_blk_queue(struct gendisk *gd, u16 sector_size) static void xlvbd_flush(struct blkfront_info *info) { blk_queue_flush(info->rq, info->feature_flush); - printk(KERN_INFO "blkfront: %s: %s: %s %s\n", + printk(KERN_INFO "blkfront: %s: %s: %s %s %s %s %s\n", info->gd->disk_name, info->flush_op == BLKIF_OP_WRITE_BARRIER ? "barrier" : (info->flush_op == BLKIF_OP_FLUSH_DISKCACHE ? "flush diskcache" : "barrier or flush"), - info->feature_flush ? "enabled" : "disabled", - info->feature_persistent ? "using persistent grants" : ""); + info->feature_flush ? "enabled;" : "disabled;", + "persistent grants:", + info->feature_persistent ? "enabled;" : "disabled;", + "indirect descriptors:", + info->max_indirect_segments ? "enabled;" : "disabled;"); } static int xen_translate_vdev(int vdevice, int *minor, unsigned int *offset) @@ -667,7 +739,8 @@ static char *encode_disk_name(char *ptr, unsigned int n) static int xlvbd_alloc_gendisk(blkif_sector_t capacity, struct blkfront_info *info, - u16 vdisk_info, u16 sector_size) + u16 vdisk_info, u16 sector_size, + unsigned int physical_sector_size) { struct gendisk *gd; int nr_minors = 1; @@ -734,7 +807,9 @@ static int xlvbd_alloc_gendisk(blkif_sector_t capacity, gd->driverfs_dev = &(info->xbdev->dev); set_capacity(gd, capacity); - if (xlvbd_init_blk_queue(gd, sector_size)) { + if (xlvbd_init_blk_queue(gd, sector_size, physical_sector_size, + info->max_indirect_segments ? : + BLKIF_MAX_SEGMENTS_PER_REQUEST)) { del_gendisk(gd); goto release; } @@ -818,6 +893,7 @@ static void blkif_free(struct blkfront_info *info, int suspend) { struct grant *persistent_gnt; struct grant *n; + int i, j, segs; /* Prevent new requests being issued until we fix things up. */ spin_lock_irq(&info->io_lock); @@ -843,6 +919,47 @@ static void blkif_free(struct blkfront_info *info, int suspend) } BUG_ON(info->persistent_gnts_c != 0); + for (i = 0; i < BLK_RING_SIZE; i++) { + /* + * Clear persistent grants present in requests already + * on the shared ring + */ + if (!info->shadow[i].request) + goto free_shadow; + + segs = info->shadow[i].req.operation == BLKIF_OP_INDIRECT ? + info->shadow[i].req.u.indirect.nr_segments : + info->shadow[i].req.u.rw.nr_segments; + for (j = 0; j < segs; j++) { + persistent_gnt = info->shadow[i].grants_used[j]; + gnttab_end_foreign_access(persistent_gnt->gref, 0, 0UL); + __free_page(pfn_to_page(persistent_gnt->pfn)); + kfree(persistent_gnt); + } + + if (info->shadow[i].req.operation != BLKIF_OP_INDIRECT) + /* + * If this is not an indirect operation don't try to + * free indirect segments + */ + goto free_shadow; + + for (j = 0; j < INDIRECT_GREFS(segs); j++) { + persistent_gnt = info->shadow[i].indirect_grants[j]; + gnttab_end_foreign_access(persistent_gnt->gref, 0, 0UL); + __free_page(pfn_to_page(persistent_gnt->pfn)); + kfree(persistent_gnt); + } + +free_shadow: + kfree(info->shadow[i].grants_used); + info->shadow[i].grants_used = NULL; + kfree(info->shadow[i].indirect_grants); + info->shadow[i].indirect_grants = NULL; + kfree(info->shadow[i].sg); + info->shadow[i].sg = NULL; + } + /* No more gnttab callback work. */ gnttab_cancel_free_callback(&info->callback); spin_unlock_irq(&info->io_lock); @@ -867,12 +984,13 @@ static void blkif_completion(struct blk_shadow *s, struct blkfront_info *info, struct blkif_response *bret) { int i = 0; - struct bio_vec *bvec; - struct req_iterator iter; - unsigned long flags; + struct scatterlist *sg; char *bvec_data; void *shared_data; - unsigned int offset = 0; + int nseg; + + nseg = s->req.operation == BLKIF_OP_INDIRECT ? + s->req.u.indirect.nr_segments : s->req.u.rw.nr_segments; if (bret->operation == BLKIF_OP_READ) { /* @@ -881,26 +999,29 @@ static void blkif_completion(struct blk_shadow *s, struct blkfront_info *info, * than PAGE_SIZE, we have to keep track of the current offset, * to be sure we are copying the data from the right shared page. */ - rq_for_each_segment(bvec, s->request, iter) { - BUG_ON((bvec->bv_offset + bvec->bv_len) > PAGE_SIZE); - if (bvec->bv_offset < offset) - i++; - BUG_ON(i >= s->req.u.rw.nr_segments); + for_each_sg(s->sg, sg, nseg, i) { + BUG_ON(sg->offset + sg->length > PAGE_SIZE); shared_data = kmap_atomic( pfn_to_page(s->grants_used[i]->pfn)); - bvec_data = bvec_kmap_irq(bvec, &flags); - memcpy(bvec_data, shared_data + bvec->bv_offset, - bvec->bv_len); - bvec_kunmap_irq(bvec_data, &flags); + bvec_data = kmap_atomic(sg_page(sg)); + memcpy(bvec_data + sg->offset, + shared_data + sg->offset, + sg->length); + kunmap_atomic(bvec_data); kunmap_atomic(shared_data); - offset = bvec->bv_offset + bvec->bv_len; } } /* Add the persistent grant into the list of free grants */ - for (i = 0; i < s->req.u.rw.nr_segments; i++) { + for (i = 0; i < nseg; i++) { list_add(&s->grants_used[i]->node, &info->persistent_gnts); info->persistent_gnts_c++; } + if (s->req.operation == BLKIF_OP_INDIRECT) { + for (i = 0; i < INDIRECT_GREFS(nseg); i++) { + list_add(&s->indirect_grants[i]->node, &info->persistent_gnts); + info->persistent_gnts_c++; + } + } } static irqreturn_t blkif_interrupt(int irq, void *dev_id) @@ -1034,14 +1155,6 @@ static int setup_blkring(struct xenbus_device *dev, SHARED_RING_INIT(sring); FRONT_RING_INIT(&info->ring, sring, PAGE_SIZE); - sg_init_table(info->sg, BLKIF_MAX_SEGMENTS_PER_REQUEST); - - /* Allocate memory for grants */ - err = fill_grant_buffer(info, BLK_RING_SIZE * - BLKIF_MAX_SEGMENTS_PER_REQUEST); - if (err) - goto fail; - err = xenbus_grant_ring(dev, virt_to_mfn(info->ring.sring)); if (err < 0) { free_page((unsigned long)sring); @@ -1223,13 +1336,84 @@ static int blkfront_probe(struct xenbus_device *dev, return 0; } +/* + * This is a clone of md_trim_bio, used to split a bio into smaller ones + */ +static void trim_bio(struct bio *bio, int offset, int size) +{ + /* 'bio' is a cloned bio which we need to trim to match + * the given offset and size. + * This requires adjusting bi_sector, bi_size, and bi_io_vec + */ + int i; + struct bio_vec *bvec; + int sofar = 0; + + size <<= 9; + if (offset == 0 && size == bio->bi_size) + return; + + bio->bi_sector += offset; + bio->bi_size = size; + offset <<= 9; + clear_bit(BIO_SEG_VALID, &bio->bi_flags); + + while (bio->bi_idx < bio->bi_vcnt && + bio->bi_io_vec[bio->bi_idx].bv_len <= offset) { + /* remove this whole bio_vec */ + offset -= bio->bi_io_vec[bio->bi_idx].bv_len; + bio->bi_idx++; + } + if (bio->bi_idx < bio->bi_vcnt) { + bio->bi_io_vec[bio->bi_idx].bv_offset += offset; + bio->bi_io_vec[bio->bi_idx].bv_len -= offset; + } + /* avoid any complications with bi_idx being non-zero*/ + if (bio->bi_idx) { + memmove(bio->bi_io_vec, bio->bi_io_vec+bio->bi_idx, + (bio->bi_vcnt - bio->bi_idx) * sizeof(struct bio_vec)); + bio->bi_vcnt -= bio->bi_idx; + bio->bi_idx = 0; + } + /* Make sure vcnt and last bv are not too big */ + bio_for_each_segment(bvec, bio, i) { + if (sofar + bvec->bv_len > size) + bvec->bv_len = size - sofar; + if (bvec->bv_len == 0) { + bio->bi_vcnt = i; + break; + } + sofar += bvec->bv_len; + } +} + +static void split_bio_end(struct bio *bio, int error) +{ + struct split_bio *split_bio = bio->bi_private; + + if (error) + split_bio->err = error; + + if (atomic_dec_and_test(&split_bio->pending)) { + split_bio->bio->bi_phys_segments = 0; + bio_endio(split_bio->bio, split_bio->err); + kfree(split_bio); + } + bio_put(bio); +} static int blkif_recover(struct blkfront_info *info) { int i; - struct blkif_request *req; + struct request *req, *n; struct blk_shadow *copy; - int j; + int rc; + struct bio *bio, *cloned_bio; + struct bio_list bio_list, merge_bio; + unsigned int segs, offset; + int pending, size; + struct split_bio *split_bio; + struct list_head requests; /* Stage 1: Make a safe copy of the shadow state. */ copy = kmemdup(info->shadow, sizeof(info->shadow), @@ -1244,36 +1428,64 @@ static int blkif_recover(struct blkfront_info *info) info->shadow_free = info->ring.req_prod_pvt; info->shadow[BLK_RING_SIZE-1].req.u.rw.id = 0x0fffffff; - /* Stage 3: Find pending requests and requeue them. */ + rc = blkfront_setup_indirect(info); + if (rc) { + kfree(copy); + return rc; + } + + segs = info->max_indirect_segments ? : BLKIF_MAX_SEGMENTS_PER_REQUEST; + blk_queue_max_segments(info->rq, segs); + bio_list_init(&bio_list); + INIT_LIST_HEAD(&requests); for (i = 0; i < BLK_RING_SIZE; i++) { /* Not in use? */ if (!copy[i].request) continue; - /* Grab a request slot and copy shadow state into it. */ - req = RING_GET_REQUEST(&info->ring, info->ring.req_prod_pvt); - *req = copy[i].req; - - /* We get a new request id, and must reset the shadow state. */ - req->u.rw.id = get_id_from_freelist(info); - memcpy(&info->shadow[req->u.rw.id], ©[i], sizeof(copy[i])); - - if (req->operation != BLKIF_OP_DISCARD) { - /* Rewrite any grant references invalidated by susp/resume. */ - for (j = 0; j < req->u.rw.nr_segments; j++) - gnttab_grant_foreign_access_ref( - req->u.rw.seg[j].gref, - info->xbdev->otherend_id, - pfn_to_mfn(copy[i].grants_used[j]->pfn), - 0); + /* + * Get the bios in the request so we can re-queue them. + */ + if (copy[i].request->cmd_flags & + (REQ_FLUSH | REQ_FUA | REQ_DISCARD | REQ_SECURE)) { + /* + * Flush operations don't contain bios, so + * we need to requeue the whole request + */ + list_add(©[i].request->queuelist, &requests); + continue; } - info->shadow[req->u.rw.id].req = *req; - - info->ring.req_prod_pvt++; + merge_bio.head = copy[i].request->bio; + merge_bio.tail = copy[i].request->biotail; + bio_list_merge(&bio_list, &merge_bio); + copy[i].request->bio = NULL; + blk_put_request(copy[i].request); } kfree(copy); + /* + * Empty the queue, this is important because we might have + * requests in the queue with more segments than what we + * can handle now. + */ + spin_lock_irq(&info->io_lock); + while ((req = blk_fetch_request(info->rq)) != NULL) { + if (req->cmd_flags & + (REQ_FLUSH | REQ_FUA | REQ_DISCARD | REQ_SECURE)) { + list_add(&req->queuelist, &requests); + continue; + } + merge_bio.head = req->bio; + merge_bio.tail = req->biotail; + bio_list_merge(&bio_list, &merge_bio); + req->bio = NULL; + if (req->cmd_flags & (REQ_FLUSH | REQ_FUA)) + pr_alert("diskcache flush request found!\n"); + __blk_put_request(info->rq, req); + } + spin_unlock_irq(&info->io_lock); + xenbus_switch_state(info->xbdev, XenbusStateConnected); spin_lock_irq(&info->io_lock); @@ -1281,14 +1493,50 @@ static int blkif_recover(struct blkfront_info *info) /* Now safe for us to use the shared ring */ info->connected = BLKIF_STATE_CONNECTED; - /* Send off requeued requests */ - flush_requests(info); - /* Kick any other new requests queued since we resumed */ kick_pending_request_queues(info); + list_for_each_entry_safe(req, n, &requests, queuelist) { + /* Requeue pending requests (flush or discard) */ + list_del_init(&req->queuelist); + BUG_ON(req->nr_phys_segments > segs); + blk_requeue_request(info->rq, req); + } spin_unlock_irq(&info->io_lock); + while ((bio = bio_list_pop(&bio_list)) != NULL) { + /* Traverse the list of pending bios and re-queue them */ + if (bio_segments(bio) > segs) { + /* + * This bio has more segments than what we can + * handle, we have to split it. + */ + pending = (bio_segments(bio) + segs - 1) / segs; + split_bio = kzalloc(sizeof(*split_bio), GFP_NOIO); + BUG_ON(split_bio == NULL); + atomic_set(&split_bio->pending, pending); + split_bio->bio = bio; + for (i = 0; i < pending; i++) { + offset = (i * segs * PAGE_SIZE) >> 9; + size = min((unsigned int)(segs * PAGE_SIZE) >> 9, + (unsigned int)(bio->bi_size >> 9) - offset); + cloned_bio = bio_clone(bio, GFP_NOIO); + BUG_ON(cloned_bio == NULL); + trim_bio(cloned_bio, offset, size); + cloned_bio->bi_private = split_bio; + cloned_bio->bi_end_io = split_bio_end; + submit_bio(cloned_bio->bi_rw, cloned_bio); + } + /* + * Now we have to wait for all those smaller bios to + * end, so we can also end the "parent" bio. + */ + continue; + } + /* We don't need to split this bio */ + submit_bio(bio->bi_rw, bio); + } + return 0; } @@ -1308,8 +1556,12 @@ static int blkfront_resume(struct xenbus_device *dev) blkif_free(info, info->connected == BLKIF_STATE_CONNECTED); err = talk_to_blkback(dev, info); - if (info->connected == BLKIF_STATE_SUSPENDED && !err) - err = blkif_recover(info); + + /* + * We have to wait for the backend to switch to + * connected state, since we want to read which + * features it supports. + */ return err; } @@ -1387,6 +1639,60 @@ static void blkfront_setup_discard(struct blkfront_info *info) kfree(type); } +static int blkfront_setup_indirect(struct blkfront_info *info) +{ + unsigned int indirect_segments, segs; + int err, i; + + err = xenbus_gather(XBT_NIL, info->xbdev->otherend, + "feature-max-indirect-segments", "%u", &indirect_segments, + NULL); + if (err) { + info->max_indirect_segments = 0; + segs = BLKIF_MAX_SEGMENTS_PER_REQUEST; + } else { + info->max_indirect_segments = min(indirect_segments, + xen_blkif_max_segments); + segs = info->max_indirect_segments; + } + + err = fill_grant_buffer(info, (segs + INDIRECT_GREFS(segs)) * BLK_RING_SIZE); + if (err) + goto out_of_memory; + + for (i = 0; i < BLK_RING_SIZE; i++) { + info->shadow[i].grants_used = kzalloc( + sizeof(info->shadow[i].grants_used[0]) * segs, + GFP_NOIO); + info->shadow[i].sg = kzalloc(sizeof(info->shadow[i].sg[0]) * segs, GFP_NOIO); + if (info->max_indirect_segments) + info->shadow[i].indirect_grants = kzalloc( + sizeof(info->shadow[i].indirect_grants[0]) * + INDIRECT_GREFS(segs), + GFP_NOIO); + if ((info->shadow[i].grants_used == NULL) || + (info->shadow[i].sg == NULL) || + (info->max_indirect_segments && + (info->shadow[i].indirect_grants == NULL))) + goto out_of_memory; + sg_init_table(info->shadow[i].sg, segs); + } + + + return 0; + +out_of_memory: + for (i = 0; i < BLK_RING_SIZE; i++) { + kfree(info->shadow[i].grants_used); + info->shadow[i].grants_used = NULL; + kfree(info->shadow[i].sg); + info->shadow[i].sg = NULL; + kfree(info->shadow[i].indirect_grants); + info->shadow[i].indirect_grants = NULL; + } + return -ENOMEM; +} + /* * Invoked when the backend is finally 'ready' (and has told produced * the details about the physical device - #sectors, size, etc). @@ -1395,6 +1701,7 @@ static void blkfront_connect(struct blkfront_info *info) { unsigned long long sectors; unsigned long sector_size; + unsigned int physical_sector_size; unsigned int binfo; int err; int barrier, flush, discard, persistent; @@ -1414,8 +1721,15 @@ static void blkfront_connect(struct blkfront_info *info) set_capacity(info->gd, sectors); revalidate_disk(info->gd); - /* fall through */ + return; case BLKIF_STATE_SUSPENDED: + /* + * If we are recovering from suspension, we need to wait + * for the backend to announce it's features before + * reconnecting, at least we need to know if the backend + * supports indirect descriptors, and how many. + */ + blkif_recover(info); return; default: @@ -1437,6 +1751,16 @@ static void blkfront_connect(struct blkfront_info *info) return; } + /* + * physcial-sector-size is a newer field, so old backends may not + * provide this. Assume physical sector size to be the same as + * sector_size in that case. + */ + err = xenbus_scanf(XBT_NIL, info->xbdev->otherend, + "physical-sector-size", "%u", &physical_sector_size); + if (err != 1) + physical_sector_size = sector_size; + info->feature_flush = 0; info->flush_op = 0; @@ -1483,7 +1807,15 @@ static void blkfront_connect(struct blkfront_info *info) else info->feature_persistent = persistent; - err = xlvbd_alloc_gendisk(sectors, info, binfo, sector_size); + err = blkfront_setup_indirect(info); + if (err) { + xenbus_dev_fatal(info->xbdev, err, "setup_indirect at %s", + info->xbdev->otherend); + return; + } + + err = xlvbd_alloc_gendisk(sectors, info, binfo, sector_size, + physical_sector_size); if (err) { xenbus_dev_fatal(info->xbdev, err, "xlvbd_add at %s", info->xbdev->otherend); diff --git a/drivers/crypto/caam/caamhash.c b/drivers/crypto/caam/caamhash.c index 5996521a1caf..84573b4d6f92 100644 --- a/drivers/crypto/caam/caamhash.c +++ b/drivers/crypto/caam/caamhash.c @@ -429,7 +429,7 @@ static int hash_digest_key(struct caam_hash_ctx *ctx, const u8 *key_in, dma_addr_t src_dma, dst_dma; int ret = 0; - desc = kmalloc(CAAM_CMD_SZ * 6 + CAAM_PTR_SZ * 2, GFP_KERNEL | GFP_DMA); + desc = kmalloc(CAAM_CMD_SZ * 8 + CAAM_PTR_SZ * 2, GFP_KERNEL | GFP_DMA); if (!desc) { dev_err(jrdev, "unable to allocate key input memory\n"); return -ENOMEM; diff --git a/drivers/edac/edac_mc.c b/drivers/edac/edac_mc.c index 27e86d938262..89e109022d78 100644 --- a/drivers/edac/edac_mc.c +++ b/drivers/edac/edac_mc.c @@ -48,6 +48,8 @@ static LIST_HEAD(mc_devices); */ static void const *edac_mc_owner; +static struct bus_type mc_bus[EDAC_MAX_MCS]; + unsigned edac_dimm_info_location(struct dimm_info *dimm, char *buf, unsigned len) { @@ -723,6 +725,11 @@ int edac_mc_add_mc(struct mem_ctl_info *mci) int ret = -EINVAL; edac_dbg(0, "\n"); + if (mci->mc_idx >= EDAC_MAX_MCS) { + pr_warn_once("Too many memory controllers: %d\n", mci->mc_idx); + return -ENODEV; + } + #ifdef CONFIG_EDAC_DEBUG if (edac_debug_level >= 3) edac_mc_dump_mci(mci); @@ -762,6 +769,8 @@ int edac_mc_add_mc(struct mem_ctl_info *mci) /* set load time so that error rate can be tracked */ mci->start_time = jiffies; + mci->bus = &mc_bus[mci->mc_idx]; + if (edac_create_sysfs_mci_device(mci)) { edac_mc_printk(mci, KERN_WARNING, "failed to create sysfs device\n"); diff --git a/drivers/edac/edac_mc_sysfs.c b/drivers/edac/edac_mc_sysfs.c index ef15a7e613bc..e7c32c4f7837 100644 --- a/drivers/edac/edac_mc_sysfs.c +++ b/drivers/edac/edac_mc_sysfs.c @@ -370,7 +370,7 @@ static int edac_create_csrow_object(struct mem_ctl_info *mci, return -ENODEV; csrow->dev.type = &csrow_attr_type; - csrow->dev.bus = &mci->bus; + csrow->dev.bus = mci->bus; device_initialize(&csrow->dev); csrow->dev.parent = &mci->dev; csrow->mci = mci; @@ -605,7 +605,7 @@ static int edac_create_dimm_object(struct mem_ctl_info *mci, dimm->mci = mci; dimm->dev.type = &dimm_attr_type; - dimm->dev.bus = &mci->bus; + dimm->dev.bus = mci->bus; device_initialize(&dimm->dev); dimm->dev.parent = &mci->dev; @@ -975,11 +975,13 @@ int edac_create_sysfs_mci_device(struct mem_ctl_info *mci) * The memory controller needs its own bus, in order to avoid * namespace conflicts at /sys/bus/edac. */ - mci->bus.name = kasprintf(GFP_KERNEL, "mc%d", mci->mc_idx); - if (!mci->bus.name) + mci->bus->name = kasprintf(GFP_KERNEL, "mc%d", mci->mc_idx); + if (!mci->bus->name) return -ENOMEM; - edac_dbg(0, "creating bus %s\n", mci->bus.name); - err = bus_register(&mci->bus); + + edac_dbg(0, "creating bus %s\n", mci->bus->name); + + err = bus_register(mci->bus); if (err < 0) return err; @@ -988,7 +990,7 @@ int edac_create_sysfs_mci_device(struct mem_ctl_info *mci) device_initialize(&mci->dev); mci->dev.parent = mci_pdev; - mci->dev.bus = &mci->bus; + mci->dev.bus = mci->bus; dev_set_name(&mci->dev, "mc%d", mci->mc_idx); dev_set_drvdata(&mci->dev, mci); pm_runtime_forbid(&mci->dev); @@ -997,8 +999,8 @@ int edac_create_sysfs_mci_device(struct mem_ctl_info *mci) err = device_add(&mci->dev); if (err < 0) { edac_dbg(1, "failure: create device %s\n", dev_name(&mci->dev)); - bus_unregister(&mci->bus); - kfree(mci->bus.name); + bus_unregister(mci->bus); + kfree(mci->bus->name); return err; } @@ -1064,8 +1066,8 @@ fail: } fail2: device_unregister(&mci->dev); - bus_unregister(&mci->bus); - kfree(mci->bus.name); + bus_unregister(mci->bus); + kfree(mci->bus->name); return err; } @@ -1098,8 +1100,8 @@ void edac_unregister_sysfs(struct mem_ctl_info *mci) { edac_dbg(1, "Unregistering device %s\n", dev_name(&mci->dev)); device_unregister(&mci->dev); - bus_unregister(&mci->bus); - kfree(mci->bus.name); + bus_unregister(mci->bus); + kfree(mci->bus->name); } static void mc_attr_release(struct device *dev) diff --git a/drivers/edac/i5100_edac.c b/drivers/edac/i5100_edac.c index 1b635178cc44..157b934e8ce3 100644 --- a/drivers/edac/i5100_edac.c +++ b/drivers/edac/i5100_edac.c @@ -974,7 +974,7 @@ static int i5100_setup_debugfs(struct mem_ctl_info *mci) if (!i5100_debugfs) return -ENODEV; - priv->debugfs = debugfs_create_dir(mci->bus.name, i5100_debugfs); + priv->debugfs = debugfs_create_dir(mci->bus->name, i5100_debugfs); if (!priv->debugfs) return -ENOMEM; diff --git a/drivers/gpio/gpio-msm-v2.c b/drivers/gpio/gpio-msm-v2.c index f4491a497cc8..c2fa77086eb5 100644 --- a/drivers/gpio/gpio-msm-v2.c +++ b/drivers/gpio/gpio-msm-v2.c @@ -378,7 +378,7 @@ static int msm_gpio_probe(struct platform_device *pdev) int ret, ngpio; struct resource *res; - if (!of_property_read_u32(pdev->dev.of_node, "ngpio", &ngpio)) { + if (of_property_read_u32(pdev->dev.of_node, "ngpio", &ngpio)) { dev_err(&pdev->dev, "%s: ngpio property missing\n", __func__); return -EINVAL; } diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c index dfeb3a3a8f20..c57244ef428b 100644 --- a/drivers/gpio/gpio-omap.c +++ b/drivers/gpio/gpio-omap.c @@ -1037,6 +1037,18 @@ omap_mpuio_alloc_gc(struct gpio_bank *bank, unsigned int irq_start, IRQ_NOREQUEST | IRQ_NOPROBE, 0); } +#if defined(CONFIG_OF_GPIO) +static inline bool omap_gpio_chip_boot_dt(struct gpio_chip *chip) +{ + return chip->of_node != NULL; +} +#else +static inline bool omap_gpio_chip_boot_dt(struct gpio_chip *chip) +{ + return false; +} +#endif + static void omap_gpio_chip_init(struct gpio_bank *bank) { int j; @@ -1068,24 +1080,68 @@ static void omap_gpio_chip_init(struct gpio_bank *bank) gpiochip_add(&bank->chip); - for (j = 0; j < bank->width; j++) { - int irq = irq_create_mapping(bank->domain, j); - irq_set_lockdep_class(irq, &gpio_lock_class); - irq_set_chip_data(irq, bank); - if (bank->is_mpuio) { - omap_mpuio_alloc_gc(bank, irq, bank->width); - } else { - irq_set_chip_and_handler(irq, &gpio_irq_chip, - handle_simple_irq); - set_irq_flags(irq, IRQF_VALID); - } - } + /* + * REVISIT these explicit calls to irq_create_mapping() + * to do the GPIO to IRQ domain mapping for each GPIO in + * the bank can be removed once all OMAP platforms have + * been migrated to Device Tree boot only. + * Since in DT boot irq_create_mapping() is called from + * irq_create_of_mapping() only for the GPIO lines that + * are used as interrupts. + */ + if (!omap_gpio_chip_boot_dt(&bank->chip)) + for (j = 0; j < bank->width; j++) + irq_create_mapping(bank->domain, j); irq_set_chained_handler(bank->irq, gpio_irq_handler); irq_set_handler_data(bank->irq, bank); } static const struct of_device_id omap_gpio_match[]; +static int omap_gpio_irq_map(struct irq_domain *d, unsigned int virq, + irq_hw_number_t hwirq) +{ + struct gpio_bank *bank = d->host_data; + int gpio; + int ret; + + if (!bank) + return -EINVAL; + + irq_set_lockdep_class(virq, &gpio_lock_class); + irq_set_chip_data(virq, bank); + if (bank->is_mpuio) { + omap_mpuio_alloc_gc(bank, virq, bank->width); + } else { + irq_set_chip_and_handler(virq, &gpio_irq_chip, + handle_simple_irq); + set_irq_flags(virq, IRQF_VALID); + } + + /* + * REVISIT most GPIO IRQ chip drivers need to call + * gpio_request() before a GPIO line can be used as an + * IRQ. Ideally this should be handled by the IRQ core + * but until then this has to be done on a per driver + * basis. Remove this once this is managed by the core. + */ + if (omap_gpio_chip_boot_dt(&bank->chip)) { + gpio = irq_to_gpio(bank, hwirq); + ret = gpio_request_one(gpio, GPIOF_IN, NULL); + if (ret) { + dev_err(bank->dev, "Could not request GPIO%d\n", gpio); + return ret; + } + } + + return 0; +} + +static struct irq_domain_ops omap_gpio_irq_ops = { + .xlate = irq_domain_xlate_onetwocell, + .map = omap_gpio_irq_map, +}; + static int omap_gpio_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -1151,10 +1207,10 @@ static int omap_gpio_probe(struct platform_device *pdev) } bank->domain = irq_domain_add_legacy(node, bank->width, irq_base, - 0, &irq_domain_simple_ops, NULL); + 0, &omap_gpio_irq_ops, bank); #else bank->domain = irq_domain_add_linear(node, bank->width, - &irq_domain_simple_ops, NULL); + &omap_gpio_irq_ops, bank); #endif if (!bank->domain) { dev_err(dev, "Couldn't register an IRQ domain\n"); diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c index 738a4294d820..6a647493ca7f 100644 --- a/drivers/gpu/drm/drm_crtc_helper.c +++ b/drivers/gpu/drm/drm_crtc_helper.c @@ -677,6 +677,11 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set) /* don't break so fail path works correct */ fail = 1; break; + + if (connector->dpms != DRM_MODE_DPMS_ON) { + DRM_DEBUG_KMS("connector dpms not on, full mode switch\n"); + mode_changed = true; + } } } @@ -754,6 +759,12 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set) ret = -EINVAL; goto fail; } + DRM_DEBUG_KMS("Setting connector DPMS state to on\n"); + for (i = 0; i < set->num_connectors; i++) { + DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id, + drm_get_connector_name(set->connectors[i])); + set->connectors[i]->funcs->dpms(set->connectors[i], DRM_MODE_DPMS_ON); + } } drm_helper_disable_unused_functions(dev); } else if (fb_changed) { @@ -771,22 +782,6 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set) } } - /* - * crtc set_config helpers implicit set the crtc and all connected - * encoders to DPMS on for a full mode set. But for just an fb update it - * doesn't do that. To not confuse userspace, do an explicit DPMS_ON - * unconditionally. This will also ensure driver internal dpms state is - * consistent again. - */ - if (set->crtc->enabled) { - DRM_DEBUG_KMS("Setting connector DPMS state to on\n"); - for (i = 0; i < set->num_connectors; i++) { - DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id, - drm_get_connector_name(set->connectors[i])); - set->connectors[i]->funcs->dpms(set->connectors[i], DRM_MODE_DPMS_ON); - } - } - kfree(save_connectors); kfree(save_encoders); kfree(save_crtcs); diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c index cf188ab7051a..67ec54f67afe 100644 --- a/drivers/gpu/drm/i915/i915_dma.c +++ b/drivers/gpu/drm/i915/i915_dma.c @@ -1495,6 +1495,14 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags) dev_priv->dev = dev; dev_priv->info = info; + spin_lock_init(&dev_priv->irq_lock); + spin_lock_init(&dev_priv->gpu_error.lock); + spin_lock_init(&dev_priv->rps.lock); + spin_lock_init(&dev_priv->backlight.lock); + mutex_init(&dev_priv->dpio_lock); + mutex_init(&dev_priv->rps.hw_lock); + mutex_init(&dev_priv->modeset_restore_lock); + i915_dump_device_info(dev_priv); if (i915_get_bridge_dev(dev)) { @@ -1585,6 +1593,7 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags) intel_detect_pch(dev); intel_irq_init(dev); + intel_gt_sanitize(dev); intel_gt_init(dev); /* Try to make sure MCHBAR is enabled before poking at it */ @@ -1610,15 +1619,6 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags) if (!IS_I945G(dev) && !IS_I945GM(dev)) pci_enable_msi(dev->pdev); - spin_lock_init(&dev_priv->irq_lock); - spin_lock_init(&dev_priv->gpu_error.lock); - spin_lock_init(&dev_priv->rps.lock); - spin_lock_init(&dev_priv->backlight.lock); - mutex_init(&dev_priv->dpio_lock); - - mutex_init(&dev_priv->rps.hw_lock); - mutex_init(&dev_priv->modeset_restore_lock); - dev_priv->num_plane = 1; if (IS_VALLEYVIEW(dev)) dev_priv->num_plane = 2; diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index f4af1ca0fb62..45b3c030f483 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -706,7 +706,7 @@ static int i915_drm_thaw(struct drm_device *dev) { int error = 0; - intel_gt_reset(dev); + intel_gt_sanitize(dev); if (drm_core_check_feature(dev, DRIVER_MODESET)) { mutex_lock(&dev->struct_mutex); @@ -732,7 +732,7 @@ int i915_resume(struct drm_device *dev) pci_set_master(dev->pdev); - intel_gt_reset(dev); + intel_gt_sanitize(dev); /* * Platforms with opregion should have sane BIOS, older ones (gen3 and @@ -1253,21 +1253,21 @@ hsw_unclaimed_reg_check(struct drm_i915_private *dev_priv, u32 reg) #define __i915_read(x, y) \ u##x i915_read##x(struct drm_i915_private *dev_priv, u32 reg) { \ + unsigned long irqflags; \ u##x val = 0; \ + spin_lock_irqsave(&dev_priv->gt_lock, irqflags); \ if (IS_GEN5(dev_priv->dev)) \ ilk_dummy_write(dev_priv); \ if (NEEDS_FORCE_WAKE((dev_priv), (reg))) { \ - unsigned long irqflags; \ - spin_lock_irqsave(&dev_priv->gt_lock, irqflags); \ if (dev_priv->forcewake_count == 0) \ dev_priv->gt.force_wake_get(dev_priv); \ val = read##y(dev_priv->regs + reg); \ if (dev_priv->forcewake_count == 0) \ dev_priv->gt.force_wake_put(dev_priv); \ - spin_unlock_irqrestore(&dev_priv->gt_lock, irqflags); \ } else { \ val = read##y(dev_priv->regs + reg); \ } \ + spin_unlock_irqrestore(&dev_priv->gt_lock, irqflags); \ trace_i915_reg_rw(false, reg, val, sizeof(val)); \ return val; \ } @@ -1280,8 +1280,10 @@ __i915_read(64, q) #define __i915_write(x, y) \ void i915_write##x(struct drm_i915_private *dev_priv, u32 reg, u##x val) { \ + unsigned long irqflags; \ u32 __fifo_ret = 0; \ trace_i915_reg_rw(true, reg, val, sizeof(val)); \ + spin_lock_irqsave(&dev_priv->gt_lock, irqflags); \ if (NEEDS_FORCE_WAKE((dev_priv), (reg))) { \ __fifo_ret = __gen6_gt_wait_for_fifo(dev_priv); \ } \ @@ -1293,6 +1295,7 @@ void i915_write##x(struct drm_i915_private *dev_priv, u32 reg, u##x val) { \ gen6_gt_check_fifodbg(dev_priv); \ } \ hsw_unclaimed_reg_check(dev_priv, reg); \ + spin_unlock_irqrestore(&dev_priv->gt_lock, irqflags); \ } __i915_write(8, b) __i915_write(16, w) diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index a416645bcd23..d2ee3343c943 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -555,6 +555,7 @@ enum intel_sbi_destination { #define QUIRK_PIPEA_FORCE (1<<0) #define QUIRK_LVDS_SSC_DISABLE (1<<1) #define QUIRK_INVERT_BRIGHTNESS (1<<2) +#define QUIRK_NO_PCH_PWM_ENABLE (1<<3) struct intel_fbdev; struct intel_fbc_work; @@ -1583,7 +1584,7 @@ void i915_handle_error(struct drm_device *dev, bool wedged); extern void intel_irq_init(struct drm_device *dev); extern void intel_hpd_init(struct drm_device *dev); extern void intel_gt_init(struct drm_device *dev); -extern void intel_gt_reset(struct drm_device *dev); +extern void intel_gt_sanitize(struct drm_device *dev); void i915_error_state_free(struct kref *error_ref); diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 97afd2639fb6..d9e2208cfe98 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -2258,7 +2258,17 @@ void i915_gem_restore_fences(struct drm_device *dev) for (i = 0; i < dev_priv->num_fence_regs; i++) { struct drm_i915_fence_reg *reg = &dev_priv->fence_regs[i]; - i915_gem_write_fence(dev, i, reg->obj); + + /* + * Commit delayed tiling changes if we have an object still + * attached to the fence, otherwise just clear the fence. + */ + if (reg->obj) { + i915_gem_object_update_fence(reg->obj, reg, + reg->obj->tiling_mode); + } else { + i915_gem_write_fence(dev, i, NULL); + } } } @@ -2795,6 +2805,10 @@ static void i915_gem_write_fence(struct drm_device *dev, int reg, if (i915_gem_object_needs_mb(dev_priv->fence_regs[reg].obj)) mb(); + WARN(obj && (!obj->stride || !obj->tiling_mode), + "bogus fence setup with stride: 0x%x, tiling mode: %i\n", + obj->stride, obj->tiling_mode); + switch (INTEL_INFO(dev)->gen) { case 7: case 6: @@ -2836,6 +2850,7 @@ static void i915_gem_object_update_fence(struct drm_i915_gem_object *obj, fence->obj = NULL; list_del_init(&fence->lru_list); } + obj->fence_dirty = false; } static int @@ -2965,7 +2980,6 @@ i915_gem_object_get_fence(struct drm_i915_gem_object *obj) return 0; i915_gem_object_update_fence(obj, reg, enable); - obj->fence_dirty = false; return 0; } diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c index 324211ac9c55..b042ee5c4070 100644 --- a/drivers/gpu/drm/i915/intel_ddi.c +++ b/drivers/gpu/drm/i915/intel_ddi.c @@ -301,7 +301,7 @@ static void intel_ddi_mode_set(struct drm_encoder *encoder, struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder); - intel_dp->DP = intel_dig_port->port_reversal | + intel_dp->DP = intel_dig_port->saved_port_bits | DDI_BUF_CTL_ENABLE | DDI_BUF_EMP_400MV_0DB_HSW; intel_dp->DP |= DDI_PORT_WIDTH(intel_dp->lane_count); @@ -1109,7 +1109,8 @@ static void intel_enable_ddi(struct intel_encoder *intel_encoder) * enabling the port. */ I915_WRITE(DDI_BUF_CTL(port), - intel_dig_port->port_reversal | DDI_BUF_CTL_ENABLE); + intel_dig_port->saved_port_bits | + DDI_BUF_CTL_ENABLE); } else if (type == INTEL_OUTPUT_EDP) { struct intel_dp *intel_dp = enc_to_intel_dp(encoder); @@ -1347,8 +1348,9 @@ void intel_ddi_init(struct drm_device *dev, enum port port) intel_encoder->get_config = intel_ddi_get_config; intel_dig_port->port = port; - intel_dig_port->port_reversal = I915_READ(DDI_BUF_CTL(port)) & - DDI_BUF_PORT_REVERSAL; + intel_dig_port->saved_port_bits = I915_READ(DDI_BUF_CTL(port)) & + (DDI_BUF_PORT_REVERSAL | + DDI_A_4_LANES); intel_dig_port->dp.output_reg = DDI_BUF_CTL(port); intel_encoder->type = INTEL_OUTPUT_UNKNOWN; diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 85f3eb74d2b7..5fb305840db8 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -4913,22 +4913,19 @@ static void i9xx_get_pfit_config(struct intel_crtc *crtc, uint32_t tmp; tmp = I915_READ(PFIT_CONTROL); + if (!(tmp & PFIT_ENABLE)) + return; + /* Check whether the pfit is attached to our pipe. */ if (INTEL_INFO(dev)->gen < 4) { if (crtc->pipe != PIPE_B) return; - - /* gen2/3 store dither state in pfit control, needs to match */ - pipe_config->gmch_pfit.control = tmp & PANEL_8TO6_DITHER_ENABLE; } else { if ((tmp & PFIT_PIPE_MASK) != (crtc->pipe << PFIT_PIPE_SHIFT)) return; } - if (!(tmp & PFIT_ENABLE)) - return; - - pipe_config->gmch_pfit.control = I915_READ(PFIT_CONTROL); + pipe_config->gmch_pfit.control = tmp; pipe_config->gmch_pfit.pgm_ratios = I915_READ(PFIT_PGM_RATIOS); if (INTEL_INFO(dev)->gen < 5) pipe_config->gmch_pfit.lvds_border_bits = @@ -8317,6 +8314,8 @@ check_shared_dpll_state(struct drm_device *dev) pll->active, pll->refcount); WARN(pll->active && !pll->on, "pll in active use but not on in sw tracking\n"); + WARN(pll->on && !pll->active, + "pll in on but not on in use in sw tracking\n"); WARN(pll->on != active, "pll on state mismatch (expected %i, found %i)\n", pll->on, active); @@ -8541,15 +8540,20 @@ static void intel_set_config_restore_state(struct drm_device *dev, } static bool -is_crtc_connector_off(struct drm_crtc *crtc, struct drm_connector *connectors, - int num_connectors) +is_crtc_connector_off(struct drm_mode_set *set) { int i; - for (i = 0; i < num_connectors; i++) - if (connectors[i].encoder && - connectors[i].encoder->crtc == crtc && - connectors[i].dpms != DRM_MODE_DPMS_ON) + if (set->num_connectors == 0) + return false; + + if (WARN_ON(set->connectors == NULL)) + return false; + + for (i = 0; i < set->num_connectors; i++) + if (set->connectors[i]->encoder && + set->connectors[i]->encoder->crtc == set->crtc && + set->connectors[i]->dpms != DRM_MODE_DPMS_ON) return true; return false; @@ -8562,10 +8566,8 @@ intel_set_config_compute_mode_changes(struct drm_mode_set *set, /* We should be able to check here if the fb has the same properties * and then just flip_or_move it */ - if (set->connectors != NULL && - is_crtc_connector_off(set->crtc, *set->connectors, - set->num_connectors)) { - config->mode_changed = true; + if (is_crtc_connector_off(set)) { + config->mode_changed = true; } else if (set->crtc->fb != set->fb) { /* If we have no fb then treat it as a full mode set */ if (set->crtc->fb == NULL) { @@ -9398,6 +9400,17 @@ static void quirk_invert_brightness(struct drm_device *dev) DRM_INFO("applying inverted panel brightness quirk\n"); } +/* + * Some machines (Dell XPS13) suffer broken backlight controls if + * BLM_PCH_PWM_ENABLE is set. + */ +static void quirk_no_pcm_pwm_enable(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + dev_priv->quirks |= QUIRK_NO_PCH_PWM_ENABLE; + DRM_INFO("applying no-PCH_PWM_ENABLE quirk\n"); +} + struct intel_quirk { int device; int subsystem_vendor; @@ -9467,6 +9480,11 @@ static struct intel_quirk intel_quirks[] = { /* Acer Aspire 4736Z */ { 0x2a42, 0x1025, 0x0260, quirk_invert_brightness }, + + /* Dell XPS13 HD Sandy Bridge */ + { 0x0116, 0x1028, 0x052e, quirk_no_pcm_pwm_enable }, + /* Dell XPS13 HD and XPS13 FHD Ivy Bridge */ + { 0x0166, 0x1028, 0x058b, quirk_no_pcm_pwm_enable }, }; static void intel_init_quirks(struct drm_device *dev) @@ -9817,8 +9835,8 @@ static void intel_modeset_readout_hw_state(struct drm_device *dev) } pll->refcount = pll->active; - DRM_DEBUG_KMS("%s hw state readout: refcount %i\n", - pll->name, pll->refcount); + DRM_DEBUG_KMS("%s hw state readout: refcount %i, on %i\n", + pll->name, pll->refcount, pll->on); } list_for_each_entry(encoder, &dev->mode_config.encoder_list, @@ -9869,6 +9887,7 @@ void intel_modeset_setup_hw_state(struct drm_device *dev, struct drm_plane *plane; struct intel_crtc *crtc; struct intel_encoder *encoder; + int i; intel_modeset_readout_hw_state(dev); @@ -9884,6 +9903,18 @@ void intel_modeset_setup_hw_state(struct drm_device *dev, intel_dump_pipe_config(crtc, &crtc->config, "[setup_hw_state]"); } + for (i = 0; i < dev_priv->num_shared_dpll; i++) { + struct intel_shared_dpll *pll = &dev_priv->shared_dplls[i]; + + if (!pll->on || pll->active) + continue; + + DRM_DEBUG_KMS("%s enabled but not in use, disabling\n", pll->name); + + pll->disable(dev_priv, pll); + pll->on = false; + } + if (force_restore) { /* * We need to use raw interfaces for restoring state to avoid diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index c8c9b6f48230..b7d6e09456ce 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -504,7 +504,7 @@ struct intel_dp { struct intel_digital_port { struct intel_encoder base; enum port port; - u32 port_reversal; + u32 saved_port_bits; struct intel_dp dp; struct intel_hdmi hdmi; }; diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c index 021e8daa022d..61348eae2f04 100644 --- a/drivers/gpu/drm/i915/intel_lvds.c +++ b/drivers/gpu/drm/i915/intel_lvds.c @@ -109,6 +109,13 @@ static void intel_lvds_get_config(struct intel_encoder *encoder, flags |= DRM_MODE_FLAG_PVSYNC; pipe_config->adjusted_mode.flags |= flags; + + /* gen2/3 store dither state in pfit control, needs to match */ + if (INTEL_INFO(dev)->gen < 4) { + tmp = I915_READ(PFIT_CONTROL); + + pipe_config->gmch_pfit.control |= tmp & PANEL_8TO6_DITHER_ENABLE; + } } /* The LVDS pin pair needs to be on before the DPLLs are enabled. @@ -290,14 +297,11 @@ static bool intel_lvds_compute_config(struct intel_encoder *intel_encoder, intel_pch_panel_fitting(intel_crtc, pipe_config, intel_connector->panel.fitting_mode); - return true; } else { intel_gmch_panel_fitting(intel_crtc, pipe_config, intel_connector->panel.fitting_mode); - } - drm_mode_set_crtcinfo(adjusted_mode, 0); - pipe_config->timings_set = true; + } /* * XXX: It would be nice to support lower refresh rates on the diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c index 80bea1d3209f..67e2c1f1c9a8 100644 --- a/drivers/gpu/drm/i915/intel_panel.c +++ b/drivers/gpu/drm/i915/intel_panel.c @@ -194,6 +194,9 @@ void intel_gmch_panel_fitting(struct intel_crtc *intel_crtc, adjusted_mode->vdisplay == mode->vdisplay) goto out; + drm_mode_set_crtcinfo(adjusted_mode, 0); + pipe_config->timings_set = true; + switch (fitting_mode) { case DRM_MODE_SCALE_CENTER: /* @@ -580,7 +583,8 @@ void intel_panel_enable_backlight(struct drm_device *dev, POSTING_READ(reg); I915_WRITE(reg, tmp | BLM_PWM_ENABLE); - if (HAS_PCH_SPLIT(dev)) { + if (HAS_PCH_SPLIT(dev) && + !(dev_priv->quirks & QUIRK_NO_PCH_PWM_ENABLE)) { tmp = I915_READ(BLC_PWM_PCH_CTL1); tmp |= BLM_PCH_PWM_ENABLE; tmp &= ~BLM_PCH_OVERRIDE_ENABLE; diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index d10e6735771f..6a347f54d39f 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -5476,7 +5476,7 @@ static void vlv_force_wake_put(struct drm_i915_private *dev_priv) gen6_gt_check_fifodbg(dev_priv); } -void intel_gt_reset(struct drm_device *dev) +void intel_gt_sanitize(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; @@ -5487,6 +5487,10 @@ void intel_gt_reset(struct drm_device *dev) if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev)) __gen6_gt_force_wake_mt_reset(dev_priv); } + + /* BIOS often leaves RC6 enabled, but disable it for hw init */ + if (INTEL_INFO(dev)->gen >= 6) + intel_disable_gt_powersave(dev); } void intel_gt_init(struct drm_device *dev) @@ -5495,8 +5499,6 @@ void intel_gt_init(struct drm_device *dev) spin_lock_init(&dev_priv->gt_lock); - intel_gt_reset(dev); - if (IS_VALLEYVIEW(dev)) { dev_priv->gt.force_wake_get = vlv_force_wake_get; dev_priv->gt.force_wake_put = vlv_force_wake_put; diff --git a/drivers/gpu/drm/nouveau/core/engine/bsp/nvc0.c b/drivers/gpu/drm/nouveau/core/engine/bsp/nvc0.c index 262c9f5f5f60..ce860de43e61 100644 --- a/drivers/gpu/drm/nouveau/core/engine/bsp/nvc0.c +++ b/drivers/gpu/drm/nouveau/core/engine/bsp/nvc0.c @@ -90,6 +90,7 @@ nvc0_bsp_ctor(struct nouveau_object *parent, struct nouveau_object *engine, return ret; nv_subdev(priv)->unit = 0x00008000; + nv_subdev(priv)->intr = nouveau_falcon_intr; nv_engine(priv)->cclass = &nvc0_bsp_cclass; nv_engine(priv)->sclass = nvc0_bsp_sclass; return 0; diff --git a/drivers/gpu/drm/nouveau/core/engine/bsp/nve0.c b/drivers/gpu/drm/nouveau/core/engine/bsp/nve0.c index c46882c83982..ba6aeca0285e 100644 --- a/drivers/gpu/drm/nouveau/core/engine/bsp/nve0.c +++ b/drivers/gpu/drm/nouveau/core/engine/bsp/nve0.c @@ -90,6 +90,7 @@ nve0_bsp_ctor(struct nouveau_object *parent, struct nouveau_object *engine, return ret; nv_subdev(priv)->unit = 0x00008000; + nv_subdev(priv)->intr = nouveau_falcon_intr; nv_engine(priv)->cclass = &nve0_bsp_cclass; nv_engine(priv)->sclass = nve0_bsp_sclass; return 0; diff --git a/drivers/gpu/drm/nouveau/core/engine/falcon.c b/drivers/gpu/drm/nouveau/core/engine/falcon.c index 3c7a31f7590e..e03fc8e4dc1d 100644 --- a/drivers/gpu/drm/nouveau/core/engine/falcon.c +++ b/drivers/gpu/drm/nouveau/core/engine/falcon.c @@ -23,6 +23,25 @@ #include <engine/falcon.h> #include <subdev/timer.h> +void +nouveau_falcon_intr(struct nouveau_subdev *subdev) +{ + struct nouveau_falcon *falcon = (void *)subdev; + u32 dispatch = nv_ro32(falcon, 0x01c); + u32 intr = nv_ro32(falcon, 0x008) & dispatch & ~(dispatch >> 16); + + if (intr & 0x00000010) { + nv_debug(falcon, "ucode halted\n"); + nv_wo32(falcon, 0x004, 0x00000010); + intr &= ~0x00000010; + } + + if (intr) { + nv_error(falcon, "unhandled intr 0x%08x\n", intr); + nv_wo32(falcon, 0x004, intr); + } +} + u32 _nouveau_falcon_rd32(struct nouveau_object *object, u64 addr) { diff --git a/drivers/gpu/drm/nouveau/core/engine/ppp/nvc0.c b/drivers/gpu/drm/nouveau/core/engine/ppp/nvc0.c index 98072c1ff360..73719aaa62d6 100644 --- a/drivers/gpu/drm/nouveau/core/engine/ppp/nvc0.c +++ b/drivers/gpu/drm/nouveau/core/engine/ppp/nvc0.c @@ -90,6 +90,7 @@ nvc0_ppp_ctor(struct nouveau_object *parent, struct nouveau_object *engine, return ret; nv_subdev(priv)->unit = 0x00000002; + nv_subdev(priv)->intr = nouveau_falcon_intr; nv_engine(priv)->cclass = &nvc0_ppp_cclass; nv_engine(priv)->sclass = nvc0_ppp_sclass; return 0; diff --git a/drivers/gpu/drm/nouveau/core/engine/vp/nvc0.c b/drivers/gpu/drm/nouveau/core/engine/vp/nvc0.c index 1879229b60eb..ac1f62aace72 100644 --- a/drivers/gpu/drm/nouveau/core/engine/vp/nvc0.c +++ b/drivers/gpu/drm/nouveau/core/engine/vp/nvc0.c @@ -90,6 +90,7 @@ nvc0_vp_ctor(struct nouveau_object *parent, struct nouveau_object *engine, return ret; nv_subdev(priv)->unit = 0x00020000; + nv_subdev(priv)->intr = nouveau_falcon_intr; nv_engine(priv)->cclass = &nvc0_vp_cclass; nv_engine(priv)->sclass = nvc0_vp_sclass; return 0; diff --git a/drivers/gpu/drm/nouveau/core/engine/vp/nve0.c b/drivers/gpu/drm/nouveau/core/engine/vp/nve0.c index d28ecbf7bc49..d4c3108479c9 100644 --- a/drivers/gpu/drm/nouveau/core/engine/vp/nve0.c +++ b/drivers/gpu/drm/nouveau/core/engine/vp/nve0.c @@ -90,6 +90,7 @@ nve0_vp_ctor(struct nouveau_object *parent, struct nouveau_object *engine, return ret; nv_subdev(priv)->unit = 0x00020000; + nv_subdev(priv)->intr = nouveau_falcon_intr; nv_engine(priv)->cclass = &nve0_vp_cclass; nv_engine(priv)->sclass = nve0_vp_sclass; return 0; diff --git a/drivers/gpu/drm/nouveau/core/include/engine/falcon.h b/drivers/gpu/drm/nouveau/core/include/engine/falcon.h index 1edec386ab36..181aa7da524d 100644 --- a/drivers/gpu/drm/nouveau/core/include/engine/falcon.h +++ b/drivers/gpu/drm/nouveau/core/include/engine/falcon.h @@ -72,6 +72,8 @@ int nouveau_falcon_create_(struct nouveau_object *, struct nouveau_object *, struct nouveau_oclass *, u32, bool, const char *, const char *, int, void **); +void nouveau_falcon_intr(struct nouveau_subdev *subdev); + #define _nouveau_falcon_dtor _nouveau_engine_dtor int _nouveau_falcon_init(struct nouveau_object *); int _nouveau_falcon_fini(struct nouveau_object *, bool); diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c index 4b1afb131380..4e7ee5f4155c 100644 --- a/drivers/gpu/drm/nouveau/nouveau_bo.c +++ b/drivers/gpu/drm/nouveau/nouveau_bo.c @@ -148,6 +148,7 @@ nouveau_bo_del_ttm(struct ttm_buffer_object *bo) if (unlikely(nvbo->gem)) DRM_ERROR("bo %p still attached to GEM object\n", bo); + WARN_ON(nvbo->pin_refcnt > 0); nv10_bo_put_tile_region(dev, nvbo->tile, NULL); kfree(nvbo); } @@ -197,6 +198,12 @@ nouveau_bo_new(struct drm_device *dev, int size, int align, size_t acc_size; int ret; int type = ttm_bo_type_device; + int max_size = INT_MAX & ~((1 << drm->client.base.vm->vmm->lpg_shift) - 1); + + if (size <= 0 || size > max_size) { + nv_warn(drm, "skipped size %x\n", (u32)size); + return -EINVAL; + } if (sg) type = ttm_bo_type_sg; @@ -340,13 +347,15 @@ nouveau_bo_unpin(struct nouveau_bo *nvbo) { struct nouveau_drm *drm = nouveau_bdev(nvbo->bo.bdev); struct ttm_buffer_object *bo = &nvbo->bo; - int ret; + int ret, ref; ret = ttm_bo_reserve(bo, false, false, false, 0); if (ret) return ret; - if (--nvbo->pin_refcnt) + ref = --nvbo->pin_refcnt; + WARN_ON_ONCE(ref < 0); + if (ref) goto out; nouveau_bo_placement_set(nvbo, bo->mem.placement, 0); @@ -578,7 +587,7 @@ nve0_bo_move_init(struct nouveau_channel *chan, u32 handle) int ret = RING_SPACE(chan, 2); if (ret == 0) { BEGIN_NVC0(chan, NvSubCopy, 0x0000, 1); - OUT_RING (chan, handle); + OUT_RING (chan, handle & 0x0000ffff); FIRE_RING (chan); } return ret; @@ -973,7 +982,7 @@ nouveau_bo_move_m2mf(struct ttm_buffer_object *bo, int evict, bool intr, struct ttm_mem_reg *old_mem = &bo->mem; int ret; - mutex_lock(&chan->cli->mutex); + mutex_lock_nested(&chan->cli->mutex, SINGLE_DEPTH_NESTING); /* create temporary vmas for the transfer and attach them to the * old nouveau_mem node, these will get cleaned up after ttm has @@ -1014,7 +1023,7 @@ nouveau_bo_move_init(struct nouveau_drm *drm) struct ttm_mem_reg *, struct ttm_mem_reg *); int (*init)(struct nouveau_channel *, u32 handle); } _methods[] = { - { "COPY", 0, 0xa0b5, nve0_bo_move_copy, nve0_bo_move_init }, + { "COPY", 4, 0xa0b5, nve0_bo_move_copy, nve0_bo_move_init }, { "GRCE", 0, 0xa0b5, nve0_bo_move_copy, nvc0_bo_move_init }, { "COPY1", 5, 0x90b8, nvc0_bo_move_copy, nvc0_bo_move_init }, { "COPY0", 4, 0x90b5, nvc0_bo_move_copy, nvc0_bo_move_init }, @@ -1034,7 +1043,7 @@ nouveau_bo_move_init(struct nouveau_drm *drm) struct nouveau_channel *chan; u32 handle = (mthd->engine << 16) | mthd->oclass; - if (mthd->init == nve0_bo_move_init) + if (mthd->engine) chan = drm->cechan; else chan = drm->channel; diff --git a/drivers/gpu/drm/nouveau/nouveau_display.c b/drivers/gpu/drm/nouveau/nouveau_display.c index 708b2d1c0037..907d20ef6d4d 100644 --- a/drivers/gpu/drm/nouveau/nouveau_display.c +++ b/drivers/gpu/drm/nouveau/nouveau_display.c @@ -138,7 +138,7 @@ nouveau_user_framebuffer_create(struct drm_device *dev, { struct nouveau_framebuffer *nouveau_fb; struct drm_gem_object *gem; - int ret; + int ret = -ENOMEM; gem = drm_gem_object_lookup(dev, file_priv, mode_cmd->handles[0]); if (!gem) @@ -146,15 +146,19 @@ nouveau_user_framebuffer_create(struct drm_device *dev, nouveau_fb = kzalloc(sizeof(struct nouveau_framebuffer), GFP_KERNEL); if (!nouveau_fb) - return ERR_PTR(-ENOMEM); + goto err_unref; ret = nouveau_framebuffer_init(dev, nouveau_fb, mode_cmd, nouveau_gem_object(gem)); - if (ret) { - drm_gem_object_unreference(gem); - return ERR_PTR(ret); - } + if (ret) + goto err; return &nouveau_fb->base; + +err: + kfree(nouveau_fb); +err_unref: + drm_gem_object_unreference(gem); + return ERR_PTR(ret); } static const struct drm_mode_config_funcs nouveau_mode_config_funcs = { @@ -524,9 +528,12 @@ nouveau_crtc_page_flip(struct drm_crtc *crtc, struct drm_framebuffer *fb, struct nouveau_page_flip_state *s; struct nouveau_channel *chan = NULL; struct nouveau_fence *fence; - struct list_head res; - struct ttm_validate_buffer res_val[2]; + struct ttm_validate_buffer resv[2] = { + { .bo = &old_bo->bo }, + { .bo = &new_bo->bo }, + }; struct ww_acquire_ctx ticket; + LIST_HEAD(res); int ret; if (!drm->channel) @@ -545,27 +552,19 @@ nouveau_crtc_page_flip(struct drm_crtc *crtc, struct drm_framebuffer *fb, chan = drm->channel; spin_unlock(&old_bo->bo.bdev->fence_lock); - mutex_lock(&chan->cli->mutex); - if (new_bo != old_bo) { ret = nouveau_bo_pin(new_bo, TTM_PL_FLAG_VRAM); - if (likely(!ret)) { - res_val[0].bo = &old_bo->bo; - res_val[1].bo = &new_bo->bo; - INIT_LIST_HEAD(&res); - list_add_tail(&res_val[0].head, &res); - list_add_tail(&res_val[1].head, &res); - ret = ttm_eu_reserve_buffers(&ticket, &res); - if (ret) - nouveau_bo_unpin(new_bo); - } - } else - ret = ttm_bo_reserve(&new_bo->bo, false, false, false, 0); + if (ret) + goto fail_free; - if (ret) { - mutex_unlock(&chan->cli->mutex); - goto fail_free; + list_add(&resv[1].head, &res); } + list_add(&resv[0].head, &res); + + mutex_lock(&chan->cli->mutex); + ret = ttm_eu_reserve_buffers(&ticket, &res); + if (ret) + goto fail_unpin; /* Initialize a page flip struct */ *s = (struct nouveau_page_flip_state) @@ -576,10 +575,8 @@ nouveau_crtc_page_flip(struct drm_crtc *crtc, struct drm_framebuffer *fb, /* Emit a page flip */ if (nv_device(drm->device)->card_type >= NV_50) { ret = nv50_display_flip_next(crtc, fb, chan, 0); - if (ret) { - mutex_unlock(&chan->cli->mutex); + if (ret) goto fail_unreserve; - } } ret = nouveau_page_flip_emit(chan, old_bo, new_bo, s, &fence); @@ -590,22 +587,18 @@ nouveau_crtc_page_flip(struct drm_crtc *crtc, struct drm_framebuffer *fb, /* Update the crtc struct and cleanup */ crtc->fb = fb; - if (old_bo != new_bo) { - ttm_eu_fence_buffer_objects(&ticket, &res, fence); + ttm_eu_fence_buffer_objects(&ticket, &res, fence); + if (old_bo != new_bo) nouveau_bo_unpin(old_bo); - } else { - nouveau_bo_fence(new_bo, fence); - ttm_bo_unreserve(&new_bo->bo); - } nouveau_fence_unref(&fence); return 0; fail_unreserve: - if (old_bo != new_bo) { - ttm_eu_backoff_reservation(&ticket, &res); + ttm_eu_backoff_reservation(&ticket, &res); +fail_unpin: + mutex_unlock(&chan->cli->mutex); + if (old_bo != new_bo) nouveau_bo_unpin(new_bo); - } else - ttm_bo_unreserve(&new_bo->bo); fail_free: kfree(s); return ret; diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouveau/nouveau_drm.c index 218a4b522fe5..61972668fd05 100644 --- a/drivers/gpu/drm/nouveau/nouveau_drm.c +++ b/drivers/gpu/drm/nouveau/nouveau_drm.c @@ -192,6 +192,18 @@ nouveau_accel_init(struct nouveau_drm *drm) arg0 = NVE0_CHANNEL_IND_ENGINE_GR; arg1 = 1; + } else + if (device->chipset >= 0xa3 && + device->chipset != 0xaa && + device->chipset != 0xac) { + ret = nouveau_channel_new(drm, &drm->client, NVDRM_DEVICE, + NVDRM_CHAN + 1, NvDmaFB, NvDmaTT, + &drm->cechan); + if (ret) + NV_ERROR(drm, "failed to create ce channel, %d\n", ret); + + arg0 = NvDmaFB; + arg1 = NvDmaTT; } else { arg0 = NvDmaFB; arg1 = NvDmaTT; @@ -284,8 +296,6 @@ static int nouveau_drm_probe(struct pci_dev *pdev, return 0; } -static struct lock_class_key drm_client_lock_class_key; - static int nouveau_drm_load(struct drm_device *dev, unsigned long flags) { @@ -297,7 +307,6 @@ nouveau_drm_load(struct drm_device *dev, unsigned long flags) ret = nouveau_cli_create(pdev, "DRM", sizeof(*drm), (void**)&drm); if (ret) return ret; - lockdep_set_class(&drm->client.mutex, &drm_client_lock_class_key); dev->dev_private = drm; drm->dev = dev; diff --git a/drivers/gpu/drm/nouveau/nouveau_fbcon.c b/drivers/gpu/drm/nouveau/nouveau_fbcon.c index 9352010030e9..4c1bc061fae2 100644 --- a/drivers/gpu/drm/nouveau/nouveau_fbcon.c +++ b/drivers/gpu/drm/nouveau/nouveau_fbcon.c @@ -385,6 +385,7 @@ out_unlock: mutex_unlock(&dev->struct_mutex); if (chan) nouveau_bo_vma_del(nvbo, &fbcon->nouveau_fb.vma); + nouveau_bo_unmap(nvbo); out_unpin: nouveau_bo_unpin(nvbo); out_unref: diff --git a/drivers/gpu/drm/nouveau/nouveau_fence.c b/drivers/gpu/drm/nouveau/nouveau_fence.c index 1680d9187bab..be3149932c2d 100644 --- a/drivers/gpu/drm/nouveau/nouveau_fence.c +++ b/drivers/gpu/drm/nouveau/nouveau_fence.c @@ -143,7 +143,7 @@ nouveau_fence_emit(struct nouveau_fence *fence, struct nouveau_channel *chan) int ret; fence->channel = chan; - fence->timeout = jiffies + (3 * DRM_HZ); + fence->timeout = jiffies + (15 * DRM_HZ); fence->sequence = ++fctx->sequence; ret = fctx->emit(fence); diff --git a/drivers/gpu/drm/nouveau/nouveau_gem.c b/drivers/gpu/drm/nouveau/nouveau_gem.c index e72d09c068a8..830cb7bad922 100644 --- a/drivers/gpu/drm/nouveau/nouveau_gem.c +++ b/drivers/gpu/drm/nouveau/nouveau_gem.c @@ -50,12 +50,6 @@ nouveau_gem_object_del(struct drm_gem_object *gem) return; nvbo->gem = NULL; - /* Lockdep hates you for doing reserve with gem object lock held */ - if (WARN_ON_ONCE(nvbo->pin_refcnt)) { - nvbo->pin_refcnt = 1; - nouveau_bo_unpin(nvbo); - } - if (gem->import_attach) drm_prime_gem_destroy(gem, nvbo->bo.sg); diff --git a/drivers/gpu/drm/nouveau/nv50_display.c b/drivers/gpu/drm/nouveau/nv50_display.c index 54dc6355b0c2..8b40a36c1b57 100644 --- a/drivers/gpu/drm/nouveau/nv50_display.c +++ b/drivers/gpu/drm/nouveau/nv50_display.c @@ -355,6 +355,7 @@ struct nv50_oimm { struct nv50_head { struct nouveau_crtc base; + struct nouveau_bo *image; struct nv50_curs curs; struct nv50_sync sync; struct nv50_ovly ovly; @@ -517,9 +518,10 @@ nv50_display_flip_next(struct drm_crtc *crtc, struct drm_framebuffer *fb, { struct nouveau_framebuffer *nv_fb = nouveau_framebuffer(fb); struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc); + struct nv50_head *head = nv50_head(crtc); struct nv50_sync *sync = nv50_sync(crtc); - int head = nv_crtc->index, ret; u32 *push; + int ret; swap_interval <<= 4; if (swap_interval == 0) @@ -537,7 +539,7 @@ nv50_display_flip_next(struct drm_crtc *crtc, struct drm_framebuffer *fb, return ret; BEGIN_NV04(chan, 0, NV11_SUBCHAN_DMA_SEMAPHORE, 2); - OUT_RING (chan, NvEvoSema0 + head); + OUT_RING (chan, NvEvoSema0 + nv_crtc->index); OUT_RING (chan, sync->addr ^ 0x10); BEGIN_NV04(chan, 0, NV11_SUBCHAN_SEMAPHORE_RELEASE, 1); OUT_RING (chan, sync->data + 1); @@ -546,7 +548,7 @@ nv50_display_flip_next(struct drm_crtc *crtc, struct drm_framebuffer *fb, OUT_RING (chan, sync->data); } else if (chan && nv_mclass(chan->object) < NVC0_CHANNEL_IND_CLASS) { - u64 addr = nv84_fence_crtc(chan, head) + sync->addr; + u64 addr = nv84_fence_crtc(chan, nv_crtc->index) + sync->addr; ret = RING_SPACE(chan, 12); if (ret) return ret; @@ -565,7 +567,7 @@ nv50_display_flip_next(struct drm_crtc *crtc, struct drm_framebuffer *fb, OUT_RING (chan, NV84_SUBCHAN_SEMAPHORE_TRIGGER_ACQUIRE_EQUAL); } else if (chan) { - u64 addr = nv84_fence_crtc(chan, head) + sync->addr; + u64 addr = nv84_fence_crtc(chan, nv_crtc->index) + sync->addr; ret = RING_SPACE(chan, 10); if (ret) return ret; @@ -630,6 +632,8 @@ nv50_display_flip_next(struct drm_crtc *crtc, struct drm_framebuffer *fb, evo_mthd(push, 0x0080, 1); evo_data(push, 0x00000000); evo_kick(push, sync); + + nouveau_bo_ref(nv_fb->nvbo, &head->image); return 0; } @@ -1038,18 +1042,17 @@ static int nv50_crtc_swap_fbs(struct drm_crtc *crtc, struct drm_framebuffer *old_fb) { struct nouveau_framebuffer *nvfb = nouveau_framebuffer(crtc->fb); + struct nv50_head *head = nv50_head(crtc); int ret; ret = nouveau_bo_pin(nvfb->nvbo, TTM_PL_FLAG_VRAM); - if (ret) - return ret; - - if (old_fb) { - nvfb = nouveau_framebuffer(old_fb); - nouveau_bo_unpin(nvfb->nvbo); + if (ret == 0) { + if (head->image) + nouveau_bo_unpin(head->image); + nouveau_bo_ref(nvfb->nvbo, &head->image); } - return 0; + return ret; } static int @@ -1198,6 +1201,15 @@ nv50_crtc_lut_load(struct drm_crtc *crtc) } } +static void +nv50_crtc_disable(struct drm_crtc *crtc) +{ + struct nv50_head *head = nv50_head(crtc); + if (head->image) + nouveau_bo_unpin(head->image); + nouveau_bo_ref(NULL, &head->image); +} + static int nv50_crtc_cursor_set(struct drm_crtc *crtc, struct drm_file *file_priv, uint32_t handle, uint32_t width, uint32_t height) @@ -1271,18 +1283,29 @@ nv50_crtc_destroy(struct drm_crtc *crtc) struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc); struct nv50_disp *disp = nv50_disp(crtc->dev); struct nv50_head *head = nv50_head(crtc); + nv50_dmac_destroy(disp->core, &head->ovly.base); nv50_pioc_destroy(disp->core, &head->oimm.base); nv50_dmac_destroy(disp->core, &head->sync.base); nv50_pioc_destroy(disp->core, &head->curs.base); + + /*XXX: this shouldn't be necessary, but the core doesn't call + * disconnect() during the cleanup paths + */ + if (head->image) + nouveau_bo_unpin(head->image); + nouveau_bo_ref(NULL, &head->image); + nouveau_bo_unmap(nv_crtc->cursor.nvbo); if (nv_crtc->cursor.nvbo) nouveau_bo_unpin(nv_crtc->cursor.nvbo); nouveau_bo_ref(NULL, &nv_crtc->cursor.nvbo); + nouveau_bo_unmap(nv_crtc->lut.nvbo); if (nv_crtc->lut.nvbo) nouveau_bo_unpin(nv_crtc->lut.nvbo); nouveau_bo_ref(NULL, &nv_crtc->lut.nvbo); + drm_crtc_cleanup(crtc); kfree(crtc); } @@ -1296,6 +1319,7 @@ static const struct drm_crtc_helper_funcs nv50_crtc_hfunc = { .mode_set_base = nv50_crtc_mode_set_base, .mode_set_base_atomic = nv50_crtc_mode_set_base_atomic, .load_lut = nv50_crtc_lut_load, + .disable = nv50_crtc_disable, }; static const struct drm_crtc_funcs nv50_crtc_func = { diff --git a/drivers/md/bcache/alloc.c b/drivers/md/bcache/alloc.c index 048f2947e08b..e45f5575fd4d 100644 --- a/drivers/md/bcache/alloc.c +++ b/drivers/md/bcache/alloc.c @@ -63,7 +63,10 @@ #include "bcache.h" #include "btree.h" +#include <linux/freezer.h> +#include <linux/kthread.h> #include <linux/random.h> +#include <trace/events/bcache.h> #define MAX_IN_FLIGHT_DISCARDS 8U @@ -151,7 +154,7 @@ static void discard_finish(struct work_struct *w) mutex_unlock(&ca->set->bucket_lock); closure_wake_up(&ca->set->bucket_wait); - wake_up(&ca->set->alloc_wait); + wake_up_process(ca->alloc_thread); closure_put(&ca->set->cl); } @@ -350,38 +353,30 @@ static void invalidate_buckets(struct cache *ca) break; } - pr_debug("free %zu/%zu free_inc %zu/%zu unused %zu/%zu", - fifo_used(&ca->free), ca->free.size, - fifo_used(&ca->free_inc), ca->free_inc.size, - fifo_used(&ca->unused), ca->unused.size); + trace_bcache_alloc_invalidate(ca); } #define allocator_wait(ca, cond) \ do { \ - DEFINE_WAIT(__wait); \ - \ while (1) { \ - prepare_to_wait(&ca->set->alloc_wait, \ - &__wait, TASK_INTERRUPTIBLE); \ + set_current_state(TASK_INTERRUPTIBLE); \ if (cond) \ break; \ \ mutex_unlock(&(ca)->set->bucket_lock); \ - if (test_bit(CACHE_SET_STOPPING_2, &ca->set->flags)) { \ - finish_wait(&ca->set->alloc_wait, &__wait); \ - closure_return(cl); \ - } \ + if (kthread_should_stop()) \ + return 0; \ \ + try_to_freeze(); \ schedule(); \ mutex_lock(&(ca)->set->bucket_lock); \ } \ - \ - finish_wait(&ca->set->alloc_wait, &__wait); \ + __set_current_state(TASK_RUNNING); \ } while (0) -void bch_allocator_thread(struct closure *cl) +static int bch_allocator_thread(void *arg) { - struct cache *ca = container_of(cl, struct cache, alloc); + struct cache *ca = arg; mutex_lock(&ca->set->bucket_lock); @@ -442,7 +437,7 @@ long bch_bucket_alloc(struct cache *ca, unsigned watermark, struct closure *cl) { long r = -1; again: - wake_up(&ca->set->alloc_wait); + wake_up_process(ca->alloc_thread); if (fifo_used(&ca->free) > ca->watermark[watermark] && fifo_pop(&ca->free, r)) { @@ -476,9 +471,7 @@ again: return r; } - pr_debug("alloc failure: blocked %i free %zu free_inc %zu unused %zu", - atomic_read(&ca->set->prio_blocked), fifo_used(&ca->free), - fifo_used(&ca->free_inc), fifo_used(&ca->unused)); + trace_bcache_alloc_fail(ca); if (cl) { closure_wait(&ca->set->bucket_wait, cl); @@ -552,6 +545,17 @@ int bch_bucket_alloc_set(struct cache_set *c, unsigned watermark, /* Init */ +int bch_cache_allocator_start(struct cache *ca) +{ + struct task_struct *k = kthread_run(bch_allocator_thread, + ca, "bcache_allocator"); + if (IS_ERR(k)) + return PTR_ERR(k); + + ca->alloc_thread = k; + return 0; +} + void bch_cache_allocator_exit(struct cache *ca) { struct discard *d; diff --git a/drivers/md/bcache/bcache.h b/drivers/md/bcache/bcache.h index d3e15b42a4ab..b39f6f0b45f2 100644 --- a/drivers/md/bcache/bcache.h +++ b/drivers/md/bcache/bcache.h @@ -178,7 +178,6 @@ #define pr_fmt(fmt) "bcache: %s() " fmt "\n", __func__ #include <linux/bio.h> -#include <linux/blktrace_api.h> #include <linux/kobject.h> #include <linux/list.h> #include <linux/mutex.h> @@ -388,8 +387,6 @@ struct keybuf_key { typedef bool (keybuf_pred_fn)(struct keybuf *, struct bkey *); struct keybuf { - keybuf_pred_fn *key_predicate; - struct bkey last_scanned; spinlock_t lock; @@ -437,9 +434,12 @@ struct bcache_device { /* If nonzero, we're detaching/unregistering from cache set */ atomic_t detaching; + int flush_done; + + uint64_t nr_stripes; + unsigned stripe_size_bits; + atomic_t *stripe_sectors_dirty; - atomic_long_t sectors_dirty; - unsigned long sectors_dirty_gc; unsigned long sectors_dirty_last; long sectors_dirty_derivative; @@ -531,6 +531,7 @@ struct cached_dev { unsigned sequential_merge:1; unsigned verify:1; + unsigned partial_stripes_expensive:1; unsigned writeback_metadata:1; unsigned writeback_running:1; unsigned char writeback_percent; @@ -565,8 +566,7 @@ struct cache { unsigned watermark[WATERMARK_MAX]; - struct closure alloc; - struct workqueue_struct *alloc_workqueue; + struct task_struct *alloc_thread; struct closure prio; struct prio_set *disk_buckets; @@ -664,13 +664,9 @@ struct gc_stat { * CACHE_SET_STOPPING always gets set first when we're closing down a cache set; * we'll continue to run normally for awhile with CACHE_SET_STOPPING set (i.e. * flushing dirty data). - * - * CACHE_SET_STOPPING_2 gets set at the last phase, when it's time to shut down - * the allocation thread. */ #define CACHE_SET_UNREGISTERING 0 #define CACHE_SET_STOPPING 1 -#define CACHE_SET_STOPPING_2 2 struct cache_set { struct closure cl; @@ -703,9 +699,6 @@ struct cache_set { /* For the btree cache */ struct shrinker shrink; - /* For the allocator itself */ - wait_queue_head_t alloc_wait; - /* For the btree cache and anything allocation related */ struct mutex bucket_lock; @@ -823,10 +816,9 @@ struct cache_set { /* * A btree node on disk could have too many bsets for an iterator to fit - * on the stack - this is a single element mempool for btree_read_work() + * on the stack - have to dynamically allocate them */ - struct mutex fill_lock; - struct btree_iter *fill_iter; + mempool_t *fill_iter; /* * btree_sort() is a merge sort and requires temporary space - single @@ -834,6 +826,7 @@ struct cache_set { */ struct mutex sort_lock; struct bset *sort; + unsigned sort_crit_factor; /* List of buckets we're currently writing data to */ struct list_head data_buckets; @@ -906,8 +899,6 @@ static inline unsigned local_clock_us(void) return local_clock() >> 10; } -#define MAX_BSETS 4U - #define BTREE_PRIO USHRT_MAX #define INITIAL_PRIO 32768 @@ -1112,23 +1103,6 @@ static inline void __bkey_put(struct cache_set *c, struct bkey *k) atomic_dec_bug(&PTR_BUCKET(c, k, i)->pin); } -/* Blktrace macros */ - -#define blktrace_msg(c, fmt, ...) \ -do { \ - struct request_queue *q = bdev_get_queue(c->bdev); \ - if (q) \ - blk_add_trace_msg(q, fmt, ##__VA_ARGS__); \ -} while (0) - -#define blktrace_msg_all(s, fmt, ...) \ -do { \ - struct cache *_c; \ - unsigned i; \ - for_each_cache(_c, (s), i) \ - blktrace_msg(_c, fmt, ##__VA_ARGS__); \ -} while (0) - static inline void cached_dev_put(struct cached_dev *dc) { if (atomic_dec_and_test(&dc->count)) @@ -1173,10 +1147,16 @@ static inline uint8_t bucket_disk_gen(struct bucket *b) static struct kobj_attribute ksysfs_##n = \ __ATTR(n, S_IWUSR|S_IRUSR, show, store) -/* Forward declarations */ +static inline void wake_up_allocators(struct cache_set *c) +{ + struct cache *ca; + unsigned i; + + for_each_cache(ca, c, i) + wake_up_process(ca->alloc_thread); +} -void bch_writeback_queue(struct cached_dev *); -void bch_writeback_add(struct cached_dev *, unsigned); +/* Forward declarations */ void bch_count_io_errors(struct cache *, int, const char *); void bch_bbio_count_io_errors(struct cache_set *, struct bio *, @@ -1193,7 +1173,6 @@ void bch_submit_bbio(struct bio *, struct cache_set *, struct bkey *, unsigned); uint8_t bch_inc_gen(struct cache *, struct bucket *); void bch_rescale_priorities(struct cache_set *, int); bool bch_bucket_add_unused(struct cache *, struct bucket *); -void bch_allocator_thread(struct closure *); long bch_bucket_alloc(struct cache *, unsigned, struct closure *); void bch_bucket_free(struct cache_set *, struct bkey *); @@ -1241,9 +1220,9 @@ void bch_cache_set_stop(struct cache_set *); struct cache_set *bch_cache_set_alloc(struct cache_sb *); void bch_btree_cache_free(struct cache_set *); int bch_btree_cache_alloc(struct cache_set *); -void bch_cached_dev_writeback_init(struct cached_dev *); void bch_moving_init_cache_set(struct cache_set *); +int bch_cache_allocator_start(struct cache *ca); void bch_cache_allocator_exit(struct cache *ca); int bch_cache_allocator_init(struct cache *ca); diff --git a/drivers/md/bcache/bset.c b/drivers/md/bcache/bset.c index 1d27d3af3251..8010eed06a51 100644 --- a/drivers/md/bcache/bset.c +++ b/drivers/md/bcache/bset.c @@ -78,6 +78,7 @@ struct bkey *bch_keylist_pop(struct keylist *l) bool __bch_ptr_invalid(struct cache_set *c, int level, const struct bkey *k) { unsigned i; + char buf[80]; if (level && (!KEY_PTRS(k) || !KEY_SIZE(k) || KEY_DIRTY(k))) goto bad; @@ -102,7 +103,8 @@ bool __bch_ptr_invalid(struct cache_set *c, int level, const struct bkey *k) return false; bad: - cache_bug(c, "spotted bad key %s: %s", pkey(k), bch_ptr_status(c, k)); + bch_bkey_to_text(buf, sizeof(buf), k); + cache_bug(c, "spotted bad key %s: %s", buf, bch_ptr_status(c, k)); return true; } @@ -162,10 +164,16 @@ bool bch_ptr_bad(struct btree *b, const struct bkey *k) #ifdef CONFIG_BCACHE_EDEBUG bug: mutex_unlock(&b->c->bucket_lock); - btree_bug(b, + + { + char buf[80]; + + bch_bkey_to_text(buf, sizeof(buf), k); + btree_bug(b, "inconsistent pointer %s: bucket %zu pin %i prio %i gen %i last_gc %i mark %llu gc_gen %i", - pkey(k), PTR_BUCKET_NR(b->c, k, i), atomic_read(&g->pin), - g->prio, g->gen, g->last_gc, GC_MARK(g), g->gc_gen); + buf, PTR_BUCKET_NR(b->c, k, i), atomic_read(&g->pin), + g->prio, g->gen, g->last_gc, GC_MARK(g), g->gc_gen); + } return true; #endif } @@ -1084,33 +1092,39 @@ void bch_btree_sort_into(struct btree *b, struct btree *new) new->sets->size = 0; } +#define SORT_CRIT (4096 / sizeof(uint64_t)) + void bch_btree_sort_lazy(struct btree *b) { - if (b->nsets) { - unsigned i, j, keys = 0, total; + unsigned crit = SORT_CRIT; + int i; - for (i = 0; i <= b->nsets; i++) - keys += b->sets[i].data->keys; - - total = keys; + /* Don't sort if nothing to do */ + if (!b->nsets) + goto out; - for (j = 0; j < b->nsets; j++) { - if (keys * 2 < total || - keys < 1000) { - bch_btree_sort_partial(b, j); - return; - } + /* If not a leaf node, always sort */ + if (b->level) { + bch_btree_sort(b); + return; + } - keys -= b->sets[j].data->keys; - } + for (i = b->nsets - 1; i >= 0; --i) { + crit *= b->c->sort_crit_factor; - /* Must sort if b->nsets == 3 or we'll overflow */ - if (b->nsets >= (MAX_BSETS - 1) - b->level) { - bch_btree_sort(b); + if (b->sets[i].data->keys < crit) { + bch_btree_sort_partial(b, i); return; } } + /* Sort if we'd overflow */ + if (b->nsets + 1 == MAX_BSETS) { + bch_btree_sort(b); + return; + } + +out: bset_build_written_tree(b); } diff --git a/drivers/md/bcache/bset.h b/drivers/md/bcache/bset.h index 57a9cff41546..ae115a253d73 100644 --- a/drivers/md/bcache/bset.h +++ b/drivers/md/bcache/bset.h @@ -1,6 +1,8 @@ #ifndef _BCACHE_BSET_H #define _BCACHE_BSET_H +#include <linux/slab.h> + /* * BKEYS: * @@ -142,6 +144,8 @@ /* Btree key comparison/iteration */ +#define MAX_BSETS 4U + struct btree_iter { size_t size, used; struct btree_iter_set { diff --git a/drivers/md/bcache/btree.c b/drivers/md/bcache/btree.c index 7a5658f04e62..ee372884c405 100644 --- a/drivers/md/bcache/btree.c +++ b/drivers/md/bcache/btree.c @@ -24,6 +24,7 @@ #include "btree.h" #include "debug.h" #include "request.h" +#include "writeback.h" #include <linux/slab.h> #include <linux/bitops.h> @@ -134,44 +135,17 @@ static uint64_t btree_csum_set(struct btree *b, struct bset *i) return crc ^ 0xffffffffffffffffULL; } -static void btree_bio_endio(struct bio *bio, int error) +static void bch_btree_node_read_done(struct btree *b) { - struct closure *cl = bio->bi_private; - struct btree *b = container_of(cl, struct btree, io.cl); - - if (error) - set_btree_node_io_error(b); - - bch_bbio_count_io_errors(b->c, bio, error, (bio->bi_rw & WRITE) - ? "writing btree" : "reading btree"); - closure_put(cl); -} - -static void btree_bio_init(struct btree *b) -{ - BUG_ON(b->bio); - b->bio = bch_bbio_alloc(b->c); - - b->bio->bi_end_io = btree_bio_endio; - b->bio->bi_private = &b->io.cl; -} - -void bch_btree_read_done(struct closure *cl) -{ - struct btree *b = container_of(cl, struct btree, io.cl); - struct bset *i = b->sets[0].data; - struct btree_iter *iter = b->c->fill_iter; const char *err = "bad btree header"; - BUG_ON(b->nsets || b->written); - - bch_bbio_free(b->bio, b->c); - b->bio = NULL; + struct bset *i = b->sets[0].data; + struct btree_iter *iter; - mutex_lock(&b->c->fill_lock); + iter = mempool_alloc(b->c->fill_iter, GFP_NOWAIT); + iter->size = b->c->sb.bucket_size / b->c->sb.block_size; iter->used = 0; - if (btree_node_io_error(b) || - !i->seq) + if (!i->seq) goto err; for (; @@ -228,17 +202,8 @@ void bch_btree_read_done(struct closure *cl) if (b->written < btree_blocks(b)) bch_bset_init_next(b); out: - - mutex_unlock(&b->c->fill_lock); - - spin_lock(&b->c->btree_read_time_lock); - bch_time_stats_update(&b->c->btree_read_time, b->io_start_time); - spin_unlock(&b->c->btree_read_time_lock); - - smp_wmb(); /* read_done is our write lock */ - set_btree_node_read_done(b); - - closure_return(cl); + mempool_free(iter, b->c->fill_iter); + return; err: set_btree_node_io_error(b); bch_cache_set_error(b->c, "%s at bucket %zu, block %zu, %u keys", @@ -247,48 +212,69 @@ err: goto out; } -void bch_btree_read(struct btree *b) +static void btree_node_read_endio(struct bio *bio, int error) +{ + struct closure *cl = bio->bi_private; + closure_put(cl); +} + +void bch_btree_node_read(struct btree *b) { - BUG_ON(b->nsets || b->written); + uint64_t start_time = local_clock(); + struct closure cl; + struct bio *bio; + + trace_bcache_btree_read(b); + + closure_init_stack(&cl); + + bio = bch_bbio_alloc(b->c); + bio->bi_rw = REQ_META|READ_SYNC; + bio->bi_size = KEY_SIZE(&b->key) << 9; + bio->bi_end_io = btree_node_read_endio; + bio->bi_private = &cl; + + bch_bio_map(bio, b->sets[0].data); + + bch_submit_bbio(bio, b->c, &b->key, 0); + closure_sync(&cl); - if (!closure_trylock(&b->io.cl, &b->c->cl)) - BUG(); + if (!test_bit(BIO_UPTODATE, &bio->bi_flags)) + set_btree_node_io_error(b); - b->io_start_time = local_clock(); + bch_bbio_free(bio, b->c); - btree_bio_init(b); - b->bio->bi_rw = REQ_META|READ_SYNC; - b->bio->bi_size = KEY_SIZE(&b->key) << 9; + if (btree_node_io_error(b)) + goto err; - bch_bio_map(b->bio, b->sets[0].data); + bch_btree_node_read_done(b); - pr_debug("%s", pbtree(b)); - trace_bcache_btree_read(b->bio); - bch_submit_bbio(b->bio, b->c, &b->key, 0); + spin_lock(&b->c->btree_read_time_lock); + bch_time_stats_update(&b->c->btree_read_time, start_time); + spin_unlock(&b->c->btree_read_time_lock); - continue_at(&b->io.cl, bch_btree_read_done, system_wq); + return; +err: + bch_cache_set_error(b->c, "io error reading bucket %lu", + PTR_BUCKET_NR(b->c, &b->key, 0)); } static void btree_complete_write(struct btree *b, struct btree_write *w) { if (w->prio_blocked && !atomic_sub_return(w->prio_blocked, &b->c->prio_blocked)) - wake_up(&b->c->alloc_wait); + wake_up_allocators(b->c); if (w->journal) { atomic_dec_bug(w->journal); __closure_wake_up(&b->c->journal.wait); } - if (w->owner) - closure_put(w->owner); - w->prio_blocked = 0; w->journal = NULL; - w->owner = NULL; } -static void __btree_write_done(struct closure *cl) +static void __btree_node_write_done(struct closure *cl) { struct btree *b = container_of(cl, struct btree, io.cl); struct btree_write *w = btree_prev_write(b); @@ -304,7 +290,7 @@ static void __btree_write_done(struct closure *cl) closure_return(cl); } -static void btree_write_done(struct closure *cl) +static void btree_node_write_done(struct closure *cl) { struct btree *b = container_of(cl, struct btree, io.cl); struct bio_vec *bv; @@ -313,10 +299,22 @@ static void btree_write_done(struct closure *cl) __bio_for_each_segment(bv, b->bio, n, 0) __free_page(bv->bv_page); - __btree_write_done(cl); + __btree_node_write_done(cl); } -static void do_btree_write(struct btree *b) +static void btree_node_write_endio(struct bio *bio, int error) +{ + struct closure *cl = bio->bi_private; + struct btree *b = container_of(cl, struct btree, io.cl); + + if (error) + set_btree_node_io_error(b); + + bch_bbio_count_io_errors(b->c, bio, error, "writing btree"); + closure_put(cl); +} + +static void do_btree_node_write(struct btree *b) { struct closure *cl = &b->io.cl; struct bset *i = b->sets[b->nsets].data; @@ -325,15 +323,34 @@ static void do_btree_write(struct btree *b) i->version = BCACHE_BSET_VERSION; i->csum = btree_csum_set(b, i); - btree_bio_init(b); - b->bio->bi_rw = REQ_META|WRITE_SYNC; - b->bio->bi_size = set_blocks(i, b->c) * block_bytes(b->c); + BUG_ON(b->bio); + b->bio = bch_bbio_alloc(b->c); + + b->bio->bi_end_io = btree_node_write_endio; + b->bio->bi_private = &b->io.cl; + b->bio->bi_rw = REQ_META|WRITE_SYNC|REQ_FUA; + b->bio->bi_size = set_blocks(i, b->c) * block_bytes(b->c); bch_bio_map(b->bio, i); + /* + * If we're appending to a leaf node, we don't technically need FUA - + * this write just needs to be persisted before the next journal write, + * which will be marked FLUSH|FUA. + * + * Similarly if we're writing a new btree root - the pointer is going to + * be in the next journal entry. + * + * But if we're writing a new btree node (that isn't a root) or + * appending to a non leaf btree node, we need either FUA or a flush + * when we write the parent with the new pointer. FUA is cheaper than a + * flush, and writes appending to leaf nodes aren't blocking anything so + * just make all btree node writes FUA to keep things sane. + */ + bkey_copy(&k.key, &b->key); SET_PTR_OFFSET(&k.key, 0, PTR_OFFSET(&k.key, 0) + bset_offset(b, i)); - if (!bch_bio_alloc_pages(b->bio, GFP_NOIO)) { + if (!bio_alloc_pages(b->bio, GFP_NOIO)) { int j; struct bio_vec *bv; void *base = (void *) ((unsigned long) i & ~(PAGE_SIZE - 1)); @@ -342,40 +359,41 @@ static void do_btree_write(struct btree *b) memcpy(page_address(bv->bv_page), base + j * PAGE_SIZE, PAGE_SIZE); - trace_bcache_btree_write(b->bio); bch_submit_bbio(b->bio, b->c, &k.key, 0); - continue_at(cl, btree_write_done, NULL); + continue_at(cl, btree_node_write_done, NULL); } else { b->bio->bi_vcnt = 0; bch_bio_map(b->bio, i); - trace_bcache_btree_write(b->bio); bch_submit_bbio(b->bio, b->c, &k.key, 0); closure_sync(cl); - __btree_write_done(cl); + __btree_node_write_done(cl); } } -static void __btree_write(struct btree *b) +void bch_btree_node_write(struct btree *b, struct closure *parent) { struct bset *i = b->sets[b->nsets].data; + trace_bcache_btree_write(b); + BUG_ON(current->bio_list); + BUG_ON(b->written >= btree_blocks(b)); + BUG_ON(b->written && !i->keys); + BUG_ON(b->sets->data->seq != i->seq); + bch_check_key_order(b, i); - closure_lock(&b->io, &b->c->cl); cancel_delayed_work(&b->work); + /* If caller isn't waiting for write, parent refcount is cache set */ + closure_lock(&b->io, parent ?: &b->c->cl); + clear_bit(BTREE_NODE_dirty, &b->flags); change_bit(BTREE_NODE_write_idx, &b->flags); - bch_check_key_order(b, i); - BUG_ON(b->written && !i->keys); - - do_btree_write(b); - - pr_debug("%s block %i keys %i", pbtree(b), b->written, i->keys); + do_btree_node_write(b); b->written += set_blocks(i, b->c); atomic_long_add(set_blocks(i, b->c) * b->c->sb.block_size, @@ -387,37 +405,31 @@ static void __btree_write(struct btree *b) bch_bset_init_next(b); } -static void btree_write_work(struct work_struct *w) +static void btree_node_write_work(struct work_struct *w) { struct btree *b = container_of(to_delayed_work(w), struct btree, work); - down_write(&b->lock); + rw_lock(true, b, b->level); if (btree_node_dirty(b)) - __btree_write(b); - up_write(&b->lock); + bch_btree_node_write(b, NULL); + rw_unlock(true, b); } -void bch_btree_write(struct btree *b, bool now, struct btree_op *op) +static void bch_btree_leaf_dirty(struct btree *b, struct btree_op *op) { struct bset *i = b->sets[b->nsets].data; struct btree_write *w = btree_current_write(b); - BUG_ON(b->written && - (b->written >= btree_blocks(b) || - i->seq != b->sets[0].data->seq || - !i->keys)); + BUG_ON(!b->written); + BUG_ON(!i->keys); - if (!btree_node_dirty(b)) { - set_btree_node_dirty(b); - queue_delayed_work(btree_io_wq, &b->work, - msecs_to_jiffies(30000)); - } + if (!btree_node_dirty(b)) + queue_delayed_work(btree_io_wq, &b->work, 30 * HZ); - w->prio_blocked += b->prio_blocked; - b->prio_blocked = 0; + set_btree_node_dirty(b); - if (op && op->journal && !b->level) { + if (op && op->journal) { if (w->journal && journal_pin_cmp(b->c, w, op)) { atomic_dec_bug(w->journal); @@ -430,23 +442,10 @@ void bch_btree_write(struct btree *b, bool now, struct btree_op *op) } } - if (current->bio_list) - return; - /* Force write if set is too big */ - if (now || - b->level || - set_bytes(i) > PAGE_SIZE - 48) { - if (op && now) { - /* Must wait on multiple writes */ - BUG_ON(w->owner); - w->owner = &op->cl; - closure_get(&op->cl); - } - - __btree_write(b); - } - BUG_ON(!b->written); + if (set_bytes(i) > PAGE_SIZE - 48 && + !current->bio_list) + bch_btree_node_write(b, NULL); } /* @@ -559,7 +558,7 @@ static struct btree *mca_bucket_alloc(struct cache_set *c, init_rwsem(&b->lock); lockdep_set_novalidate_class(&b->lock); INIT_LIST_HEAD(&b->list); - INIT_DELAYED_WORK(&b->work, btree_write_work); + INIT_DELAYED_WORK(&b->work, btree_node_write_work); b->c = c; closure_init_unlocked(&b->io); @@ -582,7 +581,7 @@ static int mca_reap(struct btree *b, struct closure *cl, unsigned min_order) BUG_ON(btree_node_dirty(b) && !b->sets[0].data); if (cl && btree_node_dirty(b)) - bch_btree_write(b, true, NULL); + bch_btree_node_write(b, NULL); if (cl) closure_wait_event_async(&b->io.wait, cl, @@ -623,6 +622,13 @@ static int bch_mca_shrink(struct shrinker *shrink, struct shrink_control *sc) else if (!mutex_trylock(&c->bucket_lock)) return -1; + /* + * It's _really_ critical that we don't free too many btree nodes - we + * have to always leave ourselves a reserve. The reserve is how we + * guarantee that allocating memory for a new btree node can always + * succeed, so that inserting keys into the btree can always succeed and + * IO can always make forward progress: + */ nr /= c->btree_pages; nr = min_t(unsigned long, nr, mca_can_free(c)); @@ -766,6 +772,8 @@ static struct btree *mca_cannibalize(struct cache_set *c, struct bkey *k, int ret = -ENOMEM; struct btree *i; + trace_bcache_btree_cache_cannibalize(c); + if (!cl) return ERR_PTR(-ENOMEM); @@ -784,7 +792,6 @@ static struct btree *mca_cannibalize(struct cache_set *c, struct bkey *k, return ERR_PTR(-EAGAIN); } - /* XXX: tracepoint */ c->try_harder = cl; c->try_harder_start = local_clock(); retry: @@ -905,6 +912,9 @@ retry: b = mca_find(c, k); if (!b) { + if (current->bio_list) + return ERR_PTR(-EAGAIN); + mutex_lock(&c->bucket_lock); b = mca_alloc(c, k, level, &op->cl); mutex_unlock(&c->bucket_lock); @@ -914,7 +924,7 @@ retry: if (IS_ERR(b)) return b; - bch_btree_read(b); + bch_btree_node_read(b); if (!write) downgrade_write(&b->lock); @@ -937,15 +947,12 @@ retry: for (; i <= b->nsets; i++) prefetch(b->sets[i].data); - if (!closure_wait_event(&b->io.wait, &op->cl, - btree_node_read_done(b))) { - rw_unlock(write, b); - b = ERR_PTR(-EAGAIN); - } else if (btree_node_io_error(b)) { + if (btree_node_io_error(b)) { rw_unlock(write, b); - b = ERR_PTR(-EIO); - } else - BUG_ON(!b->written); + return ERR_PTR(-EIO); + } + + BUG_ON(!b->written); return b; } @@ -959,7 +966,7 @@ static void btree_node_prefetch(struct cache_set *c, struct bkey *k, int level) mutex_unlock(&c->bucket_lock); if (!IS_ERR_OR_NULL(b)) { - bch_btree_read(b); + bch_btree_node_read(b); rw_unlock(true, b); } } @@ -970,24 +977,19 @@ static void btree_node_free(struct btree *b, struct btree_op *op) { unsigned i; + trace_bcache_btree_node_free(b); + /* * The BUG_ON() in btree_node_get() implies that we must have a write * lock on parent to free or even invalidate a node */ BUG_ON(op->lock <= b->level); BUG_ON(b == b->c->root); - pr_debug("bucket %s", pbtree(b)); if (btree_node_dirty(b)) btree_complete_write(b, btree_current_write(b)); clear_bit(BTREE_NODE_dirty, &b->flags); - if (b->prio_blocked && - !atomic_sub_return(b->prio_blocked, &b->c->prio_blocked)) - wake_up(&b->c->alloc_wait); - - b->prio_blocked = 0; - cancel_delayed_work(&b->work); mutex_lock(&b->c->bucket_lock); @@ -1028,17 +1030,20 @@ retry: goto retry; } - set_btree_node_read_done(b); b->accessed = 1; bch_bset_init_next(b); mutex_unlock(&c->bucket_lock); + + trace_bcache_btree_node_alloc(b); return b; err_free: bch_bucket_free(c, &k.key); __bkey_put(c, &k.key); err: mutex_unlock(&c->bucket_lock); + + trace_bcache_btree_node_alloc_fail(b); return b; } @@ -1137,11 +1142,8 @@ static int btree_gc_mark_node(struct btree *b, unsigned *keys, gc->nkeys++; gc->data += KEY_SIZE(k); - if (KEY_DIRTY(k)) { + if (KEY_DIRTY(k)) gc->dirty += KEY_SIZE(k); - if (d) - d->sectors_dirty_gc += KEY_SIZE(k); - } } for (t = b->sets; t <= &b->sets[b->nsets]; t++) @@ -1166,14 +1168,11 @@ static struct btree *btree_gc_alloc(struct btree *b, struct bkey *k, if (!IS_ERR_OR_NULL(n)) { swap(b, n); + __bkey_put(b->c, &b->key); memcpy(k->ptr, b->key.ptr, sizeof(uint64_t) * KEY_PTRS(&b->key)); - __bkey_put(b->c, &b->key); - atomic_inc(&b->c->prio_blocked); - b->prio_blocked++; - btree_node_free(n, op); up_write(&n->lock); } @@ -1278,7 +1277,7 @@ static void btree_gc_coalesce(struct btree *b, struct btree_op *op, btree_node_free(r->b, op); up_write(&r->b->lock); - pr_debug("coalesced %u nodes", nodes); + trace_bcache_btree_gc_coalesce(nodes); gc->nodes--; nodes--; @@ -1293,14 +1292,9 @@ static int btree_gc_recurse(struct btree *b, struct btree_op *op, void write(struct btree *r) { if (!r->written) - bch_btree_write(r, true, op); - else if (btree_node_dirty(r)) { - BUG_ON(btree_current_write(r)->owner); - btree_current_write(r)->owner = writes; - closure_get(writes); - - bch_btree_write(r, true, NULL); - } + bch_btree_node_write(r, &op->cl); + else if (btree_node_dirty(r)) + bch_btree_node_write(r, writes); up_write(&r->lock); } @@ -1386,9 +1380,7 @@ static int bch_btree_gc_root(struct btree *b, struct btree_op *op, ret = btree_gc_recurse(b, op, writes, gc); if (!b->written || btree_node_dirty(b)) { - atomic_inc(&b->c->prio_blocked); - b->prio_blocked++; - bch_btree_write(b, true, n ? op : NULL); + bch_btree_node_write(b, n ? &op->cl : NULL); } if (!IS_ERR_OR_NULL(n)) { @@ -1405,7 +1397,6 @@ static void btree_gc_start(struct cache_set *c) { struct cache *ca; struct bucket *b; - struct bcache_device **d; unsigned i; if (!c->gc_mark_valid) @@ -1419,16 +1410,12 @@ static void btree_gc_start(struct cache_set *c) for_each_cache(ca, c, i) for_each_bucket(b, ca) { b->gc_gen = b->gen; - if (!atomic_read(&b->pin)) + if (!atomic_read(&b->pin)) { SET_GC_MARK(b, GC_MARK_RECLAIMABLE); + SET_GC_SECTORS_USED(b, 0); + } } - for (d = c->devices; - d < c->devices + c->nr_uuids; - d++) - if (*d) - (*d)->sectors_dirty_gc = 0; - mutex_unlock(&c->bucket_lock); } @@ -1437,7 +1424,6 @@ size_t bch_btree_gc_finish(struct cache_set *c) size_t available = 0; struct bucket *b; struct cache *ca; - struct bcache_device **d; unsigned i; mutex_lock(&c->bucket_lock); @@ -1480,22 +1466,6 @@ size_t bch_btree_gc_finish(struct cache_set *c) } } - for (d = c->devices; - d < c->devices + c->nr_uuids; - d++) - if (*d) { - unsigned long last = - atomic_long_read(&((*d)->sectors_dirty)); - long difference = (*d)->sectors_dirty_gc - last; - - pr_debug("sectors dirty off by %li", difference); - - (*d)->sectors_dirty_last += difference; - - atomic_long_set(&((*d)->sectors_dirty), - (*d)->sectors_dirty_gc); - } - mutex_unlock(&c->bucket_lock); return available; } @@ -1508,10 +1478,9 @@ static void bch_btree_gc(struct closure *cl) struct gc_stat stats; struct closure writes; struct btree_op op; - uint64_t start_time = local_clock(); - trace_bcache_gc_start(c->sb.set_uuid); - blktrace_msg_all(c, "Starting gc"); + + trace_bcache_gc_start(c); memset(&stats, 0, sizeof(struct gc_stat)); closure_init_stack(&writes); @@ -1520,14 +1489,14 @@ static void bch_btree_gc(struct closure *cl) btree_gc_start(c); + atomic_inc(&c->prio_blocked); + ret = btree_root(gc_root, c, &op, &writes, &stats); closure_sync(&op.cl); closure_sync(&writes); if (ret) { - blktrace_msg_all(c, "Stopped gc"); pr_warn("gc failed!"); - continue_at(cl, bch_btree_gc, bch_gc_wq); } @@ -1537,6 +1506,9 @@ static void bch_btree_gc(struct closure *cl) available = bch_btree_gc_finish(c); + atomic_dec(&c->prio_blocked); + wake_up_allocators(c); + bch_time_stats_update(&c->btree_gc_time, start_time); stats.key_bytes *= sizeof(uint64_t); @@ -1544,10 +1516,8 @@ static void bch_btree_gc(struct closure *cl) stats.data <<= 9; stats.in_use = (c->nbuckets - available) * 100 / c->nbuckets; memcpy(&c->gc_stats, &stats, sizeof(struct gc_stat)); - blktrace_msg_all(c, "Finished gc"); - trace_bcache_gc_end(c->sb.set_uuid); - wake_up(&c->alloc_wait); + trace_bcache_gc_end(c); continue_at(cl, bch_moving_gc, bch_gc_wq); } @@ -1654,14 +1624,14 @@ static bool fix_overlapping_extents(struct btree *b, struct btree_iter *iter, struct btree_op *op) { - void subtract_dirty(struct bkey *k, int sectors) + void subtract_dirty(struct bkey *k, uint64_t offset, int sectors) { - struct bcache_device *d = b->c->devices[KEY_INODE(k)]; - - if (KEY_DIRTY(k) && d) - atomic_long_sub(sectors, &d->sectors_dirty); + if (KEY_DIRTY(k)) + bcache_dev_sectors_dirty_add(b->c, KEY_INODE(k), + offset, -sectors); } + uint64_t old_offset; unsigned old_size, sectors_found = 0; while (1) { @@ -1673,6 +1643,7 @@ static bool fix_overlapping_extents(struct btree *b, if (bkey_cmp(k, &START_KEY(insert)) <= 0) continue; + old_offset = KEY_START(k); old_size = KEY_SIZE(k); /* @@ -1728,7 +1699,7 @@ static bool fix_overlapping_extents(struct btree *b, struct bkey *top; - subtract_dirty(k, KEY_SIZE(insert)); + subtract_dirty(k, KEY_START(insert), KEY_SIZE(insert)); if (bkey_written(b, k)) { /* @@ -1775,7 +1746,7 @@ static bool fix_overlapping_extents(struct btree *b, } } - subtract_dirty(k, old_size - KEY_SIZE(k)); + subtract_dirty(k, old_offset, old_size - KEY_SIZE(k)); } check_failed: @@ -1798,7 +1769,7 @@ static bool btree_insert_key(struct btree *b, struct btree_op *op, { struct bset *i = b->sets[b->nsets].data; struct bkey *m, *prev; - const char *status = "insert"; + unsigned status = BTREE_INSERT_STATUS_INSERT; BUG_ON(bkey_cmp(k, &b->key) > 0); BUG_ON(b->level && !KEY_PTRS(k)); @@ -1831,17 +1802,17 @@ static bool btree_insert_key(struct btree *b, struct btree_op *op, goto insert; /* prev is in the tree, if we merge we're done */ - status = "back merging"; + status = BTREE_INSERT_STATUS_BACK_MERGE; if (prev && bch_bkey_try_merge(b, prev, k)) goto merged; - status = "overwrote front"; + status = BTREE_INSERT_STATUS_OVERWROTE; if (m != end(i) && KEY_PTRS(m) == KEY_PTRS(k) && !KEY_SIZE(m)) goto copy; - status = "front merge"; + status = BTREE_INSERT_STATUS_FRONT_MERGE; if (m != end(i) && bch_bkey_try_merge(b, k, m)) goto copy; @@ -1851,21 +1822,21 @@ static bool btree_insert_key(struct btree *b, struct btree_op *op, insert: shift_keys(b, m, k); copy: bkey_copy(m, k); merged: - bch_check_keys(b, "%s for %s at %s: %s", status, - op_type(op), pbtree(b), pkey(k)); - bch_check_key_order_msg(b, i, "%s for %s at %s: %s", status, - op_type(op), pbtree(b), pkey(k)); + if (KEY_DIRTY(k)) + bcache_dev_sectors_dirty_add(b->c, KEY_INODE(k), + KEY_START(k), KEY_SIZE(k)); + + bch_check_keys(b, "%u for %s", status, op_type(op)); if (b->level && !KEY_OFFSET(k)) - b->prio_blocked++; + btree_current_write(b)->prio_blocked++; - pr_debug("%s for %s at %s: %s", status, - op_type(op), pbtree(b), pkey(k)); + trace_bcache_btree_insert_key(b, k, op->type, status); return true; } -bool bch_btree_insert_keys(struct btree *b, struct btree_op *op) +static bool bch_btree_insert_keys(struct btree *b, struct btree_op *op) { bool ret = false; struct bkey *k; @@ -1896,7 +1867,7 @@ bool bch_btree_insert_check_key(struct btree *b, struct btree_op *op, should_split(b)) goto out; - op->replace = KEY(op->inode, bio_end(bio), bio_sectors(bio)); + op->replace = KEY(op->inode, bio_end_sector(bio), bio_sectors(bio)); SET_KEY_PTRS(&op->replace, 1); get_random_bytes(&op->replace.ptr[0], sizeof(uint64_t)); @@ -1907,7 +1878,6 @@ bool bch_btree_insert_check_key(struct btree *b, struct btree_op *op, BUG_ON(op->type != BTREE_INSERT); BUG_ON(!btree_insert_key(b, op, &tmp.k)); - bch_btree_write(b, false, NULL); ret = true; out: downgrade_write(&b->lock); @@ -1929,12 +1899,11 @@ static int btree_split(struct btree *b, struct btree_op *op) split = set_blocks(n1->sets[0].data, n1->c) > (btree_blocks(b) * 4) / 5; - pr_debug("%ssplitting at %s keys %i", split ? "" : "not ", - pbtree(b), n1->sets[0].data->keys); - if (split) { unsigned keys = 0; + trace_bcache_btree_node_split(b, n1->sets[0].data->keys); + n2 = bch_btree_node_alloc(b->c, b->level, &op->cl); if (IS_ERR(n2)) goto err_free1; @@ -1967,18 +1936,21 @@ static int btree_split(struct btree *b, struct btree_op *op) bkey_copy_key(&n2->key, &b->key); bch_keylist_add(&op->keys, &n2->key); - bch_btree_write(n2, true, op); + bch_btree_node_write(n2, &op->cl); rw_unlock(true, n2); - } else + } else { + trace_bcache_btree_node_compact(b, n1->sets[0].data->keys); + bch_btree_insert_keys(n1, op); + } bch_keylist_add(&op->keys, &n1->key); - bch_btree_write(n1, true, op); + bch_btree_node_write(n1, &op->cl); if (n3) { bkey_copy_key(&n3->key, &MAX_KEY); bch_btree_insert_keys(n3, op); - bch_btree_write(n3, true, op); + bch_btree_node_write(n3, &op->cl); closure_sync(&op->cl); bch_btree_set_root(n3); @@ -2082,8 +2054,12 @@ static int bch_btree_insert_recurse(struct btree *b, struct btree_op *op, BUG_ON(write_block(b) != b->sets[b->nsets].data); - if (bch_btree_insert_keys(b, op)) - bch_btree_write(b, false, op); + if (bch_btree_insert_keys(b, op)) { + if (!b->level) + bch_btree_leaf_dirty(b, op); + else + bch_btree_node_write(b, &op->cl); + } } return 0; @@ -2140,6 +2116,11 @@ int bch_btree_insert(struct btree_op *op, struct cache_set *c) void bch_btree_set_root(struct btree *b) { unsigned i; + struct closure cl; + + closure_init_stack(&cl); + + trace_bcache_btree_set_root(b); BUG_ON(!b->written); @@ -2153,8 +2134,8 @@ void bch_btree_set_root(struct btree *b) b->c->root = b; __bkey_put(b->c, &b->key); - bch_journal_meta(b->c, NULL); - pr_debug("%s for %pf", pbtree(b), __builtin_return_address(0)); + bch_journal_meta(b->c, &cl); + closure_sync(&cl); } /* Cache lookup */ @@ -2215,9 +2196,6 @@ static int submit_partial_cache_hit(struct btree *b, struct btree_op *op, KEY_OFFSET(k) - bio->bi_sector); n = bch_bio_split(bio, sectors, GFP_NOIO, s->d->bio_split); - if (!n) - return -EAGAIN; - if (n == bio) op->lookup_done = true; @@ -2240,7 +2218,6 @@ static int submit_partial_cache_hit(struct btree *b, struct btree_op *op, n->bi_end_io = bch_cache_read_endio; n->bi_private = &s->cl; - trace_bcache_cache_hit(n); __bch_submit_bbio(n, b->c); } @@ -2257,9 +2234,6 @@ int bch_btree_search_recurse(struct btree *b, struct btree_op *op) struct btree_iter iter; bch_btree_iter_init(b, &iter, &KEY(op->inode, bio->bi_sector, 0)); - pr_debug("at %s searching for %u:%llu", pbtree(b), op->inode, - (uint64_t) bio->bi_sector); - do { k = bch_btree_iter_next_filter(&iter, b, bch_ptr_bad); if (!k) { @@ -2303,7 +2277,8 @@ static inline int keybuf_nonoverlapping_cmp(struct keybuf_key *l, } static int bch_btree_refill_keybuf(struct btree *b, struct btree_op *op, - struct keybuf *buf, struct bkey *end) + struct keybuf *buf, struct bkey *end, + keybuf_pred_fn *pred) { struct btree_iter iter; bch_btree_iter_init(b, &iter, &buf->last_scanned); @@ -2322,11 +2297,9 @@ static int bch_btree_refill_keybuf(struct btree *b, struct btree_op *op, if (bkey_cmp(&buf->last_scanned, end) >= 0) break; - if (buf->key_predicate(buf, k)) { + if (pred(buf, k)) { struct keybuf_key *w; - pr_debug("%s", pkey(k)); - spin_lock(&buf->lock); w = array_alloc(&buf->freelist); @@ -2343,7 +2316,7 @@ static int bch_btree_refill_keybuf(struct btree *b, struct btree_op *op, if (!k) break; - btree(refill_keybuf, k, b, op, buf, end); + btree(refill_keybuf, k, b, op, buf, end, pred); /* * Might get an error here, but can't really do anything * and it'll get logged elsewhere. Just read what we @@ -2361,7 +2334,7 @@ static int bch_btree_refill_keybuf(struct btree *b, struct btree_op *op, } void bch_refill_keybuf(struct cache_set *c, struct keybuf *buf, - struct bkey *end) + struct bkey *end, keybuf_pred_fn *pred) { struct bkey start = buf->last_scanned; struct btree_op op; @@ -2369,7 +2342,7 @@ void bch_refill_keybuf(struct cache_set *c, struct keybuf *buf, cond_resched(); - btree_root(refill_keybuf, c, &op, buf, end); + btree_root(refill_keybuf, c, &op, buf, end, pred); closure_sync(&op.cl); pr_debug("found %s keys from %llu:%llu to %llu:%llu", @@ -2455,7 +2428,8 @@ struct keybuf_key *bch_keybuf_next(struct keybuf *buf) struct keybuf_key *bch_keybuf_next_rescan(struct cache_set *c, struct keybuf *buf, - struct bkey *end) + struct bkey *end, + keybuf_pred_fn *pred) { struct keybuf_key *ret; @@ -2469,15 +2443,14 @@ struct keybuf_key *bch_keybuf_next_rescan(struct cache_set *c, break; } - bch_refill_keybuf(c, buf, end); + bch_refill_keybuf(c, buf, end, pred); } return ret; } -void bch_keybuf_init(struct keybuf *buf, keybuf_pred_fn *fn) +void bch_keybuf_init(struct keybuf *buf) { - buf->key_predicate = fn; buf->last_scanned = MAX_KEY; buf->keys = RB_ROOT; diff --git a/drivers/md/bcache/btree.h b/drivers/md/bcache/btree.h index af4a7092a28c..3333d3723633 100644 --- a/drivers/md/bcache/btree.h +++ b/drivers/md/bcache/btree.h @@ -102,7 +102,6 @@ #include "debug.h" struct btree_write { - struct closure *owner; atomic_t *journal; /* If btree_split() frees a btree node, it writes a new pointer to that @@ -142,16 +141,12 @@ struct btree { */ struct bset_tree sets[MAX_BSETS]; - /* Used to refcount bio splits, also protects b->bio */ + /* For outstanding btree writes, used as a lock - protects write_idx */ struct closure_with_waitlist io; - /* Gets transferred to w->prio_blocked - see the comment there */ - int prio_blocked; - struct list_head list; struct delayed_work work; - uint64_t io_start_time; struct btree_write writes[2]; struct bio *bio; }; @@ -164,13 +159,11 @@ static inline void set_btree_node_ ## flag(struct btree *b) \ { set_bit(BTREE_NODE_ ## flag, &b->flags); } \ enum btree_flags { - BTREE_NODE_read_done, BTREE_NODE_io_error, BTREE_NODE_dirty, BTREE_NODE_write_idx, }; -BTREE_FLAG(read_done); BTREE_FLAG(io_error); BTREE_FLAG(dirty); BTREE_FLAG(write_idx); @@ -278,6 +271,13 @@ struct btree_op { BKEY_PADDED(replace); }; +enum { + BTREE_INSERT_STATUS_INSERT, + BTREE_INSERT_STATUS_BACK_MERGE, + BTREE_INSERT_STATUS_OVERWROTE, + BTREE_INSERT_STATUS_FRONT_MERGE, +}; + void bch_btree_op_init_stack(struct btree_op *); static inline void rw_lock(bool w, struct btree *b, int level) @@ -293,9 +293,7 @@ static inline void rw_unlock(bool w, struct btree *b) #ifdef CONFIG_BCACHE_EDEBUG unsigned i; - if (w && - b->key.ptr[0] && - btree_node_read_done(b)) + if (w && b->key.ptr[0]) for (i = 0; i <= b->nsets; i++) bch_check_key_order(b, b->sets[i].data); #endif @@ -370,9 +368,8 @@ static inline bool should_split(struct btree *b) > btree_blocks(b)); } -void bch_btree_read_done(struct closure *); -void bch_btree_read(struct btree *); -void bch_btree_write(struct btree *b, bool now, struct btree_op *op); +void bch_btree_node_read(struct btree *); +void bch_btree_node_write(struct btree *, struct closure *); void bch_cannibalize_unlock(struct cache_set *, struct closure *); void bch_btree_set_root(struct btree *); @@ -380,7 +377,6 @@ struct btree *bch_btree_node_alloc(struct cache_set *, int, struct closure *); struct btree *bch_btree_node_get(struct cache_set *, struct bkey *, int, struct btree_op *); -bool bch_btree_insert_keys(struct btree *, struct btree_op *); bool bch_btree_insert_check_key(struct btree *, struct btree_op *, struct bio *); int bch_btree_insert(struct btree_op *, struct cache_set *); @@ -393,13 +389,14 @@ void bch_moving_gc(struct closure *); int bch_btree_check(struct cache_set *, struct btree_op *); uint8_t __bch_btree_mark_key(struct cache_set *, int, struct bkey *); -void bch_keybuf_init(struct keybuf *, keybuf_pred_fn *); -void bch_refill_keybuf(struct cache_set *, struct keybuf *, struct bkey *); +void bch_keybuf_init(struct keybuf *); +void bch_refill_keybuf(struct cache_set *, struct keybuf *, struct bkey *, + keybuf_pred_fn *); bool bch_keybuf_check_overlapping(struct keybuf *, struct bkey *, struct bkey *); void bch_keybuf_del(struct keybuf *, struct keybuf_key *); struct keybuf_key *bch_keybuf_next(struct keybuf *); -struct keybuf_key *bch_keybuf_next_rescan(struct cache_set *, - struct keybuf *, struct bkey *); +struct keybuf_key *bch_keybuf_next_rescan(struct cache_set *, struct keybuf *, + struct bkey *, keybuf_pred_fn *); #endif diff --git a/drivers/md/bcache/closure.c b/drivers/md/bcache/closure.c index bd05a9a8c7cf..9aba2017f0d1 100644 --- a/drivers/md/bcache/closure.c +++ b/drivers/md/bcache/closure.c @@ -66,16 +66,18 @@ static inline void closure_put_after_sub(struct closure *cl, int flags) } else { struct closure *parent = cl->parent; struct closure_waitlist *wait = closure_waitlist(cl); + closure_fn *destructor = cl->fn; closure_debug_destroy(cl); + smp_mb(); atomic_set(&cl->remaining, -1); if (wait) closure_wake_up(wait); - if (cl->fn) - cl->fn(cl); + if (destructor) + destructor(cl); if (parent) closure_put(parent); diff --git a/drivers/md/bcache/debug.c b/drivers/md/bcache/debug.c index 89fd5204924e..88e6411eab4f 100644 --- a/drivers/md/bcache/debug.c +++ b/drivers/md/bcache/debug.c @@ -47,11 +47,10 @@ const char *bch_ptr_status(struct cache_set *c, const struct bkey *k) return ""; } -struct keyprint_hack bch_pkey(const struct bkey *k) +int bch_bkey_to_text(char *buf, size_t size, const struct bkey *k) { unsigned i = 0; - struct keyprint_hack r; - char *out = r.s, *end = r.s + KEYHACK_SIZE; + char *out = buf, *end = buf + size; #define p(...) (out += scnprintf(out, end - out, __VA_ARGS__)) @@ -75,16 +74,14 @@ struct keyprint_hack bch_pkey(const struct bkey *k) if (KEY_CSUM(k)) p(" cs%llu %llx", KEY_CSUM(k), k->ptr[1]); #undef p - return r; + return out - buf; } -struct keyprint_hack bch_pbtree(const struct btree *b) +int bch_btree_to_text(char *buf, size_t size, const struct btree *b) { - struct keyprint_hack r; - - snprintf(r.s, 40, "%zu level %i/%i", PTR_BUCKET_NR(b->c, &b->key, 0), - b->level, b->c->root ? b->c->root->level : -1); - return r; + return scnprintf(buf, size, "%zu level %i/%i", + PTR_BUCKET_NR(b->c, &b->key, 0), + b->level, b->c->root ? b->c->root->level : -1); } #if defined(CONFIG_BCACHE_DEBUG) || defined(CONFIG_BCACHE_EDEBUG) @@ -100,10 +97,12 @@ static void dump_bset(struct btree *b, struct bset *i) { struct bkey *k; unsigned j; + char buf[80]; for (k = i->start; k < end(i); k = bkey_next(k)) { + bch_bkey_to_text(buf, sizeof(buf), k); printk(KERN_ERR "block %zu key %zi/%u: %s", index(i, b), - (uint64_t *) k - i->d, i->keys, pkey(k)); + (uint64_t *) k - i->d, i->keys, buf); for (j = 0; j < KEY_PTRS(k); j++) { size_t n = PTR_BUCKET_NR(b->c, k, j); @@ -144,7 +143,7 @@ void bch_btree_verify(struct btree *b, struct bset *new) v->written = 0; v->level = b->level; - bch_btree_read(v); + bch_btree_node_read(v); closure_wait_event(&v->io.wait, &cl, atomic_read(&b->io.cl.remaining) == -1); @@ -200,7 +199,7 @@ void bch_data_verify(struct search *s) if (!check) return; - if (bch_bio_alloc_pages(check, GFP_NOIO)) + if (bio_alloc_pages(check, GFP_NOIO)) goto out_put; check->bi_rw = READ_SYNC; @@ -252,6 +251,7 @@ static void vdump_bucket_and_panic(struct btree *b, const char *fmt, va_list args) { unsigned i; + char buf[80]; console_lock(); @@ -262,7 +262,8 @@ static void vdump_bucket_and_panic(struct btree *b, const char *fmt, console_unlock(); - panic("at %s\n", pbtree(b)); + bch_btree_to_text(buf, sizeof(buf), b); + panic("at %s\n", buf); } void bch_check_key_order_msg(struct btree *b, struct bset *i, @@ -337,6 +338,7 @@ static ssize_t bch_dump_read(struct file *file, char __user *buf, { struct dump_iterator *i = file->private_data; ssize_t ret = 0; + char kbuf[80]; while (size) { struct keybuf_key *w; @@ -355,11 +357,12 @@ static ssize_t bch_dump_read(struct file *file, char __user *buf, if (i->bytes) break; - w = bch_keybuf_next_rescan(i->c, &i->keys, &MAX_KEY); + w = bch_keybuf_next_rescan(i->c, &i->keys, &MAX_KEY, dump_pred); if (!w) break; - i->bytes = snprintf(i->buf, PAGE_SIZE, "%s\n", pkey(&w->key)); + bch_bkey_to_text(kbuf, sizeof(kbuf), &w->key); + i->bytes = snprintf(i->buf, PAGE_SIZE, "%s\n", kbuf); bch_keybuf_del(&i->keys, w); } @@ -377,7 +380,7 @@ static int bch_dump_open(struct inode *inode, struct file *file) file->private_data = i; i->c = c; - bch_keybuf_init(&i->keys, dump_pred); + bch_keybuf_init(&i->keys); i->keys.last_scanned = KEY(0, 0, 0); return 0; @@ -409,142 +412,6 @@ void bch_debug_init_cache_set(struct cache_set *c) #endif -/* Fuzz tester has rotted: */ -#if 0 - -static ssize_t btree_fuzz(struct kobject *k, struct kobj_attribute *a, - const char *buffer, size_t size) -{ - void dump(struct btree *b) - { - struct bset *i; - - for (i = b->sets[0].data; - index(i, b) < btree_blocks(b) && - i->seq == b->sets[0].data->seq; - i = ((void *) i) + set_blocks(i, b->c) * block_bytes(b->c)) - dump_bset(b, i); - } - - struct cache_sb *sb; - struct cache_set *c; - struct btree *all[3], *b, *fill, *orig; - int j; - - struct btree_op op; - bch_btree_op_init_stack(&op); - - sb = kzalloc(sizeof(struct cache_sb), GFP_KERNEL); - if (!sb) - return -ENOMEM; - - sb->bucket_size = 128; - sb->block_size = 4; - - c = bch_cache_set_alloc(sb); - if (!c) - return -ENOMEM; - - for (j = 0; j < 3; j++) { - BUG_ON(list_empty(&c->btree_cache)); - all[j] = list_first_entry(&c->btree_cache, struct btree, list); - list_del_init(&all[j]->list); - - all[j]->key = KEY(0, 0, c->sb.bucket_size); - bkey_copy_key(&all[j]->key, &MAX_KEY); - } - - b = all[0]; - fill = all[1]; - orig = all[2]; - - while (1) { - for (j = 0; j < 3; j++) - all[j]->written = all[j]->nsets = 0; - - bch_bset_init_next(b); - - while (1) { - struct bset *i = write_block(b); - struct bkey *k = op.keys.top; - unsigned rand; - - bkey_init(k); - rand = get_random_int(); - - op.type = rand & 1 - ? BTREE_INSERT - : BTREE_REPLACE; - rand >>= 1; - - SET_KEY_SIZE(k, bucket_remainder(c, rand)); - rand >>= c->bucket_bits; - rand &= 1024 * 512 - 1; - rand += c->sb.bucket_size; - SET_KEY_OFFSET(k, rand); -#if 0 - SET_KEY_PTRS(k, 1); -#endif - bch_keylist_push(&op.keys); - bch_btree_insert_keys(b, &op); - - if (should_split(b) || - set_blocks(i, b->c) != - __set_blocks(i, i->keys + 15, b->c)) { - i->csum = csum_set(i); - - memcpy(write_block(fill), - i, set_bytes(i)); - - b->written += set_blocks(i, b->c); - fill->written = b->written; - if (b->written == btree_blocks(b)) - break; - - bch_btree_sort_lazy(b); - bch_bset_init_next(b); - } - } - - memcpy(orig->sets[0].data, - fill->sets[0].data, - btree_bytes(c)); - - bch_btree_sort(b); - fill->written = 0; - bch_btree_read_done(&fill->io.cl); - - if (b->sets[0].data->keys != fill->sets[0].data->keys || - memcmp(b->sets[0].data->start, - fill->sets[0].data->start, - b->sets[0].data->keys * sizeof(uint64_t))) { - struct bset *i = b->sets[0].data; - struct bkey *k, *l; - - for (k = i->start, - l = fill->sets[0].data->start; - k < end(i); - k = bkey_next(k), l = bkey_next(l)) - if (bkey_cmp(k, l) || - KEY_SIZE(k) != KEY_SIZE(l)) - pr_err("key %zi differs: %s != %s", - (uint64_t *) k - i->d, - pkey(k), pkey(l)); - - for (j = 0; j < 3; j++) { - pr_err("**** Set %i ****", j); - dump(all[j]); - } - panic("\n"); - } - - pr_info("fuzz complete: %i keys", b->sets[0].data->keys); - } -} - -kobj_attribute_write(fuzz, btree_fuzz); -#endif - void bch_debug_exit(void) { if (!IS_ERR_OR_NULL(debug)) @@ -554,11 +421,6 @@ void bch_debug_exit(void) int __init bch_debug_init(struct kobject *kobj) { int ret = 0; -#if 0 - ret = sysfs_create_file(kobj, &ksysfs_fuzz.attr); - if (ret) - return ret; -#endif debug = debugfs_create_dir("bcache", NULL); return ret; diff --git a/drivers/md/bcache/debug.h b/drivers/md/bcache/debug.h index f9378a218148..1c39b5a2489b 100644 --- a/drivers/md/bcache/debug.h +++ b/drivers/md/bcache/debug.h @@ -3,15 +3,8 @@ /* Btree/bkey debug printing */ -#define KEYHACK_SIZE 80 -struct keyprint_hack { - char s[KEYHACK_SIZE]; -}; - -struct keyprint_hack bch_pkey(const struct bkey *k); -struct keyprint_hack bch_pbtree(const struct btree *b); -#define pkey(k) (&bch_pkey(k).s[0]) -#define pbtree(b) (&bch_pbtree(b).s[0]) +int bch_bkey_to_text(char *buf, size_t size, const struct bkey *k); +int bch_btree_to_text(char *buf, size_t size, const struct btree *b); #ifdef CONFIG_BCACHE_EDEBUG diff --git a/drivers/md/bcache/io.c b/drivers/md/bcache/io.c index 48efd4dea645..9056632995b1 100644 --- a/drivers/md/bcache/io.c +++ b/drivers/md/bcache/io.c @@ -9,6 +9,8 @@ #include "bset.h" #include "debug.h" +#include <linux/blkdev.h> + static void bch_bi_idx_hack_endio(struct bio *bio, int error) { struct bio *p = bio->bi_private; @@ -66,13 +68,6 @@ static void bch_generic_make_request_hack(struct bio *bio) * The newly allocated bio will point to @bio's bi_io_vec, if the split was on a * bvec boundry; it is the caller's responsibility to ensure that @bio is not * freed before the split. - * - * If bch_bio_split() is running under generic_make_request(), it's not safe to - * allocate more than one bio from the same bio set. Therefore, if it is running - * under generic_make_request() it masks out __GFP_WAIT when doing the - * allocation. The caller must check for failure if there's any possibility of - * it being called from under generic_make_request(); it is then the caller's - * responsibility to retry from a safe context (by e.g. punting to workqueue). */ struct bio *bch_bio_split(struct bio *bio, int sectors, gfp_t gfp, struct bio_set *bs) @@ -83,20 +78,13 @@ struct bio *bch_bio_split(struct bio *bio, int sectors, BUG_ON(sectors <= 0); - /* - * If we're being called from underneath generic_make_request() and we - * already allocated any bios from this bio set, we risk deadlock if we - * use the mempool. So instead, we possibly fail and let the caller punt - * to workqueue or somesuch and retry in a safe context. - */ - if (current->bio_list) - gfp &= ~__GFP_WAIT; - if (sectors >= bio_sectors(bio)) return bio; if (bio->bi_rw & REQ_DISCARD) { ret = bio_alloc_bioset(gfp, 1, bs); + if (!ret) + return NULL; idx = 0; goto out; } @@ -160,17 +148,18 @@ static unsigned bch_bio_max_sectors(struct bio *bio) struct request_queue *q = bdev_get_queue(bio->bi_bdev); unsigned max_segments = min_t(unsigned, BIO_MAX_PAGES, queue_max_segments(q)); - struct bio_vec *bv, *end = bio_iovec(bio) + - min_t(int, bio_segments(bio), max_segments); if (bio->bi_rw & REQ_DISCARD) return min(ret, q->limits.max_discard_sectors); if (bio_segments(bio) > max_segments || q->merge_bvec_fn) { + struct bio_vec *bv; + int i, seg = 0; + ret = 0; - for (bv = bio_iovec(bio); bv < end; bv++) { + bio_for_each_segment(bv, bio, i) { struct bvec_merge_data bvm = { .bi_bdev = bio->bi_bdev, .bi_sector = bio->bi_sector, @@ -178,10 +167,14 @@ static unsigned bch_bio_max_sectors(struct bio *bio) .bi_rw = bio->bi_rw, }; + if (seg == max_segments) + break; + if (q->merge_bvec_fn && q->merge_bvec_fn(q, &bvm, bv) < (int) bv->bv_len) break; + seg++; ret += bv->bv_len >> 9; } } @@ -218,30 +211,10 @@ static void bch_bio_submit_split_endio(struct bio *bio, int error) closure_put(cl); } -static void __bch_bio_submit_split(struct closure *cl) -{ - struct bio_split_hook *s = container_of(cl, struct bio_split_hook, cl); - struct bio *bio = s->bio, *n; - - do { - n = bch_bio_split(bio, bch_bio_max_sectors(bio), - GFP_NOIO, s->p->bio_split); - if (!n) - continue_at(cl, __bch_bio_submit_split, system_wq); - - n->bi_end_io = bch_bio_submit_split_endio; - n->bi_private = cl; - - closure_get(cl); - bch_generic_make_request_hack(n); - } while (n != bio); - - continue_at(cl, bch_bio_submit_split_done, NULL); -} - void bch_generic_make_request(struct bio *bio, struct bio_split_pool *p) { struct bio_split_hook *s; + struct bio *n; if (!bio_has_data(bio) && !(bio->bi_rw & REQ_DISCARD)) goto submit; @@ -250,6 +223,7 @@ void bch_generic_make_request(struct bio *bio, struct bio_split_pool *p) goto submit; s = mempool_alloc(p->bio_split_hook, GFP_NOIO); + closure_init(&s->cl, NULL); s->bio = bio; s->p = p; @@ -257,8 +231,18 @@ void bch_generic_make_request(struct bio *bio, struct bio_split_pool *p) s->bi_private = bio->bi_private; bio_get(bio); - closure_call(&s->cl, __bch_bio_submit_split, NULL, NULL); - return; + do { + n = bch_bio_split(bio, bch_bio_max_sectors(bio), + GFP_NOIO, s->p->bio_split); + + n->bi_end_io = bch_bio_submit_split_endio; + n->bi_private = &s->cl; + + closure_get(&s->cl); + bch_generic_make_request_hack(n); + } while (n != bio); + + continue_at(&s->cl, bch_bio_submit_split_done, NULL); submit: bch_generic_make_request_hack(bio); } diff --git a/drivers/md/bcache/journal.c b/drivers/md/bcache/journal.c index 8c8dfdcd9d4c..ba95ab84b2be 100644 --- a/drivers/md/bcache/journal.c +++ b/drivers/md/bcache/journal.c @@ -9,6 +9,8 @@ #include "debug.h" #include "request.h" +#include <trace/events/bcache.h> + /* * Journal replay/recovery: * @@ -182,9 +184,14 @@ bsearch: pr_debug("starting binary search, l %u r %u", l, r); while (l + 1 < r) { + seq = list_entry(list->prev, struct journal_replay, + list)->j.seq; + m = (l + r) >> 1; + read_bucket(m); - if (read_bucket(m)) + if (seq != list_entry(list->prev, struct journal_replay, + list)->j.seq) l = m; else r = m; @@ -300,7 +307,8 @@ int bch_journal_replay(struct cache_set *s, struct list_head *list, for (k = i->j.start; k < end(&i->j); k = bkey_next(k)) { - pr_debug("%s", pkey(k)); + trace_bcache_journal_replay_key(k); + bkey_copy(op->keys.top, k); bch_keylist_push(&op->keys); @@ -384,7 +392,7 @@ out: return; found: if (btree_node_dirty(best)) - bch_btree_write(best, true, NULL); + bch_btree_node_write(best, NULL); rw_unlock(true, best); } @@ -617,7 +625,7 @@ static void journal_write_unlocked(struct closure *cl) bio_reset(bio); bio->bi_sector = PTR_OFFSET(k, i); bio->bi_bdev = ca->bdev; - bio->bi_rw = REQ_WRITE|REQ_SYNC|REQ_META|REQ_FLUSH; + bio->bi_rw = REQ_WRITE|REQ_SYNC|REQ_META|REQ_FLUSH|REQ_FUA; bio->bi_size = sectors << 9; bio->bi_end_io = journal_write_endio; @@ -712,7 +720,8 @@ void bch_journal(struct closure *cl) spin_lock(&c->journal.lock); if (journal_full(&c->journal)) { - /* XXX: tracepoint */ + trace_bcache_journal_full(c); + closure_wait(&c->journal.wait, cl); journal_reclaim(c); @@ -728,13 +737,15 @@ void bch_journal(struct closure *cl) if (b * c->sb.block_size > PAGE_SECTORS << JSET_BITS || b > c->journal.blocks_free) { - /* XXX: If we were inserting so many keys that they won't fit in + trace_bcache_journal_entry_full(c); + + /* + * XXX: If we were inserting so many keys that they won't fit in * an _empty_ journal write, we'll deadlock. For now, handle * this in bch_keylist_realloc() - but something to think about. */ BUG_ON(!w->data->keys); - /* XXX: tracepoint */ BUG_ON(!closure_wait(&w->wait, cl)); closure_flush(&c->journal.io); diff --git a/drivers/md/bcache/movinggc.c b/drivers/md/bcache/movinggc.c index 8589512c972e..1a3b4f4786c3 100644 --- a/drivers/md/bcache/movinggc.c +++ b/drivers/md/bcache/movinggc.c @@ -9,6 +9,8 @@ #include "debug.h" #include "request.h" +#include <trace/events/bcache.h> + struct moving_io { struct keybuf_key *w; struct search s; @@ -44,14 +46,14 @@ static void write_moving_finish(struct closure *cl) { struct moving_io *io = container_of(cl, struct moving_io, s.cl); struct bio *bio = &io->bio.bio; - struct bio_vec *bv = bio_iovec_idx(bio, bio->bi_vcnt); + struct bio_vec *bv; + int i; - while (bv-- != bio->bi_io_vec) + bio_for_each_segment_all(bv, bio, i) __free_page(bv->bv_page); - pr_debug("%s %s", io->s.op.insert_collision - ? "collision moving" : "moved", - pkey(&io->w->key)); + if (io->s.op.insert_collision) + trace_bcache_gc_copy_collision(&io->w->key); bch_keybuf_del(&io->s.op.c->moving_gc_keys, io->w); @@ -94,8 +96,6 @@ static void write_moving(struct closure *cl) struct moving_io *io = container_of(s, struct moving_io, s); if (!s->error) { - trace_bcache_write_moving(&io->bio.bio); - moving_init(io); io->bio.bio.bi_sector = KEY_START(&io->w->key); @@ -122,7 +122,6 @@ static void read_moving_submit(struct closure *cl) struct moving_io *io = container_of(s, struct moving_io, s); struct bio *bio = &io->bio.bio; - trace_bcache_read_moving(bio); bch_submit_bbio(bio, s->op.c, &io->w->key, 0); continue_at(cl, write_moving, bch_gc_wq); @@ -138,7 +137,8 @@ static void read_moving(struct closure *cl) /* XXX: if we error, background writeback could stall indefinitely */ while (!test_bit(CACHE_SET_STOPPING, &c->flags)) { - w = bch_keybuf_next_rescan(c, &c->moving_gc_keys, &MAX_KEY); + w = bch_keybuf_next_rescan(c, &c->moving_gc_keys, + &MAX_KEY, moving_pred); if (!w) break; @@ -159,10 +159,10 @@ static void read_moving(struct closure *cl) bio->bi_rw = READ; bio->bi_end_io = read_moving_endio; - if (bch_bio_alloc_pages(bio, GFP_KERNEL)) + if (bio_alloc_pages(bio, GFP_KERNEL)) goto err; - pr_debug("%s", pkey(&w->key)); + trace_bcache_gc_copy(&w->key); closure_call(&io->s.cl, read_moving_submit, NULL, &c->gc.cl); @@ -250,5 +250,5 @@ void bch_moving_gc(struct closure *cl) void bch_moving_init_cache_set(struct cache_set *c) { - bch_keybuf_init(&c->moving_gc_keys, moving_pred); + bch_keybuf_init(&c->moving_gc_keys); } diff --git a/drivers/md/bcache/request.c b/drivers/md/bcache/request.c index e5ff12e52d5b..786a1a4f74d8 100644 --- a/drivers/md/bcache/request.c +++ b/drivers/md/bcache/request.c @@ -10,6 +10,7 @@ #include "btree.h" #include "debug.h" #include "request.h" +#include "writeback.h" #include <linux/cgroup.h> #include <linux/module.h> @@ -21,8 +22,6 @@ #define CUTOFF_CACHE_ADD 95 #define CUTOFF_CACHE_READA 90 -#define CUTOFF_WRITEBACK 50 -#define CUTOFF_WRITEBACK_SYNC 75 struct kmem_cache *bch_search_cache; @@ -489,6 +488,12 @@ static void bch_insert_data_loop(struct closure *cl) bch_queue_gc(op->c); } + /* + * Journal writes are marked REQ_FLUSH; if the original write was a + * flush, it'll wait on the journal write. + */ + bio->bi_rw &= ~(REQ_FLUSH|REQ_FUA); + do { unsigned i; struct bkey *k; @@ -510,10 +515,6 @@ static void bch_insert_data_loop(struct closure *cl) goto err; n = bch_bio_split(bio, KEY_SIZE(k), GFP_NOIO, split); - if (!n) { - __bkey_put(op->c, k); - continue_at(cl, bch_insert_data_loop, bcache_wq); - } n->bi_end_io = bch_insert_data_endio; n->bi_private = cl; @@ -530,10 +531,9 @@ static void bch_insert_data_loop(struct closure *cl) if (KEY_CSUM(k)) bio_csum(n, k); - pr_debug("%s", pkey(k)); + trace_bcache_cache_insert(k); bch_keylist_push(&op->keys); - trace_bcache_cache_insert(n, n->bi_sector, n->bi_bdev); n->bi_rw |= REQ_WRITE; bch_submit_bbio(n, op->c, k, 0); } while (n != bio); @@ -716,7 +716,7 @@ static struct search *search_alloc(struct bio *bio, struct bcache_device *d) s->task = current; s->orig_bio = bio; s->write = (bio->bi_rw & REQ_WRITE) != 0; - s->op.flush_journal = (bio->bi_rw & REQ_FLUSH) != 0; + s->op.flush_journal = (bio->bi_rw & (REQ_FLUSH|REQ_FUA)) != 0; s->op.skip = (bio->bi_rw & REQ_DISCARD) != 0; s->recoverable = 1; s->start_time = jiffies; @@ -784,11 +784,8 @@ static void request_read_error(struct closure *cl) int i; if (s->recoverable) { - /* The cache read failed, but we can retry from the backing - * device. - */ - pr_debug("recovering at sector %llu", - (uint64_t) s->orig_bio->bi_sector); + /* Retry from the backing device: */ + trace_bcache_read_retry(s->orig_bio); s->error = 0; bv = s->bio.bio.bi_io_vec; @@ -806,7 +803,6 @@ static void request_read_error(struct closure *cl) /* XXX: invalidate cache */ - trace_bcache_read_retry(&s->bio.bio); closure_bio_submit(&s->bio.bio, &s->cl, s->d); } @@ -827,53 +823,13 @@ static void request_read_done(struct closure *cl) */ if (s->op.cache_bio) { - struct bio_vec *src, *dst; - unsigned src_offset, dst_offset, bytes; - void *dst_ptr; - bio_reset(s->op.cache_bio); s->op.cache_bio->bi_sector = s->cache_miss->bi_sector; s->op.cache_bio->bi_bdev = s->cache_miss->bi_bdev; s->op.cache_bio->bi_size = s->cache_bio_sectors << 9; bch_bio_map(s->op.cache_bio, NULL); - src = bio_iovec(s->op.cache_bio); - dst = bio_iovec(s->cache_miss); - src_offset = src->bv_offset; - dst_offset = dst->bv_offset; - dst_ptr = kmap(dst->bv_page); - - while (1) { - if (dst_offset == dst->bv_offset + dst->bv_len) { - kunmap(dst->bv_page); - dst++; - if (dst == bio_iovec_idx(s->cache_miss, - s->cache_miss->bi_vcnt)) - break; - - dst_offset = dst->bv_offset; - dst_ptr = kmap(dst->bv_page); - } - - if (src_offset == src->bv_offset + src->bv_len) { - src++; - if (src == bio_iovec_idx(s->op.cache_bio, - s->op.cache_bio->bi_vcnt)) - BUG(); - - src_offset = src->bv_offset; - } - - bytes = min(dst->bv_offset + dst->bv_len - dst_offset, - src->bv_offset + src->bv_len - src_offset); - - memcpy(dst_ptr + dst_offset, - page_address(src->bv_page) + src_offset, - bytes); - - src_offset += bytes; - dst_offset += bytes; - } + bio_copy_data(s->cache_miss, s->op.cache_bio); bio_put(s->cache_miss); s->cache_miss = NULL; @@ -899,6 +855,7 @@ static void request_read_done_bh(struct closure *cl) struct cached_dev *dc = container_of(s->d, struct cached_dev, disk); bch_mark_cache_accounting(s, !s->cache_miss, s->op.skip); + trace_bcache_read(s->orig_bio, !s->cache_miss, s->op.skip); if (s->error) continue_at_nobarrier(cl, request_read_error, bcache_wq); @@ -917,9 +874,6 @@ static int cached_dev_cache_miss(struct btree *b, struct search *s, struct bio *miss; miss = bch_bio_split(bio, sectors, GFP_NOIO, s->d->bio_split); - if (!miss) - return -EAGAIN; - if (miss == bio) s->op.lookup_done = true; @@ -938,8 +892,9 @@ static int cached_dev_cache_miss(struct btree *b, struct search *s, reada = min(dc->readahead >> 9, sectors - bio_sectors(miss)); - if (bio_end(miss) + reada > bdev_sectors(miss->bi_bdev)) - reada = bdev_sectors(miss->bi_bdev) - bio_end(miss); + if (bio_end_sector(miss) + reada > bdev_sectors(miss->bi_bdev)) + reada = bdev_sectors(miss->bi_bdev) - + bio_end_sector(miss); } s->cache_bio_sectors = bio_sectors(miss) + reada; @@ -963,13 +918,12 @@ static int cached_dev_cache_miss(struct btree *b, struct search *s, goto out_put; bch_bio_map(s->op.cache_bio, NULL); - if (bch_bio_alloc_pages(s->op.cache_bio, __GFP_NOWARN|GFP_NOIO)) + if (bio_alloc_pages(s->op.cache_bio, __GFP_NOWARN|GFP_NOIO)) goto out_put; s->cache_miss = miss; bio_get(s->op.cache_bio); - trace_bcache_cache_miss(s->orig_bio); closure_bio_submit(s->op.cache_bio, &s->cl, s->d); return ret; @@ -1002,24 +956,13 @@ static void cached_dev_write_complete(struct closure *cl) cached_dev_bio_complete(cl); } -static bool should_writeback(struct cached_dev *dc, struct bio *bio) -{ - unsigned threshold = (bio->bi_rw & REQ_SYNC) - ? CUTOFF_WRITEBACK_SYNC - : CUTOFF_WRITEBACK; - - return !atomic_read(&dc->disk.detaching) && - cache_mode(dc, bio) == CACHE_MODE_WRITEBACK && - dc->disk.c->gc_stats.in_use < threshold; -} - static void request_write(struct cached_dev *dc, struct search *s) { struct closure *cl = &s->cl; struct bio *bio = &s->bio.bio; struct bkey start, end; start = KEY(dc->disk.id, bio->bi_sector, 0); - end = KEY(dc->disk.id, bio_end(bio), 0); + end = KEY(dc->disk.id, bio_end_sector(bio), 0); bch_keybuf_check_overlapping(&s->op.c->moving_gc_keys, &start, &end); @@ -1034,22 +977,37 @@ static void request_write(struct cached_dev *dc, struct search *s) if (bio->bi_rw & REQ_DISCARD) goto skip; + if (should_writeback(dc, s->orig_bio, + cache_mode(dc, bio), + s->op.skip)) { + s->op.skip = false; + s->writeback = true; + } + if (s->op.skip) goto skip; - if (should_writeback(dc, s->orig_bio)) - s->writeback = true; + trace_bcache_write(s->orig_bio, s->writeback, s->op.skip); if (!s->writeback) { s->op.cache_bio = bio_clone_bioset(bio, GFP_NOIO, dc->disk.bio_split); - trace_bcache_writethrough(s->orig_bio); closure_bio_submit(bio, cl, s->d); } else { - s->op.cache_bio = bio; - trace_bcache_writeback(s->orig_bio); - bch_writeback_add(dc, bio_sectors(bio)); + bch_writeback_add(dc); + + if (s->op.flush_journal) { + /* Also need to send a flush to the backing device */ + s->op.cache_bio = bio_clone_bioset(bio, GFP_NOIO, + dc->disk.bio_split); + + bio->bi_size = 0; + bio->bi_vcnt = 0; + closure_bio_submit(bio, cl, s->d); + } else { + s->op.cache_bio = bio; + } } out: closure_call(&s->op.cl, bch_insert_data, NULL, cl); @@ -1058,7 +1016,6 @@ skip: s->op.skip = true; s->op.cache_bio = s->orig_bio; bio_get(s->op.cache_bio); - trace_bcache_write_skip(s->orig_bio); if ((bio->bi_rw & REQ_DISCARD) && !blk_queue_discard(bdev_get_queue(dc->bdev))) @@ -1088,9 +1045,10 @@ static void request_nodata(struct cached_dev *dc, struct search *s) /* Cached devices - read & write stuff */ -int bch_get_congested(struct cache_set *c) +unsigned bch_get_congested(struct cache_set *c) { int i; + long rand; if (!c->congested_read_threshold_us && !c->congested_write_threshold_us) @@ -1106,7 +1064,13 @@ int bch_get_congested(struct cache_set *c) i += CONGESTED_MAX; - return i <= 0 ? 1 : fract_exp_two(i, 6); + if (i > 0) + i = fract_exp_two(i, 6); + + rand = get_random_int(); + i -= bitmap_weight(&rand, BITS_PER_LONG); + + return i > 0 ? i : 1; } static void add_sequential(struct task_struct *t) @@ -1126,10 +1090,8 @@ static void check_should_skip(struct cached_dev *dc, struct search *s) { struct cache_set *c = s->op.c; struct bio *bio = &s->bio.bio; - - long rand; - int cutoff = bch_get_congested(c); unsigned mode = cache_mode(dc, bio); + unsigned sectors, congested = bch_get_congested(c); if (atomic_read(&dc->disk.detaching) || c->gc_stats.in_use > CUTOFF_CACHE_ADD || @@ -1147,17 +1109,14 @@ static void check_should_skip(struct cached_dev *dc, struct search *s) goto skip; } - if (!cutoff) { - cutoff = dc->sequential_cutoff >> 9; + if (!congested && !dc->sequential_cutoff) + goto rescale; - if (!cutoff) - goto rescale; - - if (mode == CACHE_MODE_WRITEBACK && - (bio->bi_rw & REQ_WRITE) && - (bio->bi_rw & REQ_SYNC)) - goto rescale; - } + if (!congested && + mode == CACHE_MODE_WRITEBACK && + (bio->bi_rw & REQ_WRITE) && + (bio->bi_rw & REQ_SYNC)) + goto rescale; if (dc->sequential_merge) { struct io *i; @@ -1177,7 +1136,7 @@ found: if (i->sequential + bio->bi_size > i->sequential) i->sequential += bio->bi_size; - i->last = bio_end(bio); + i->last = bio_end_sector(bio); i->jiffies = jiffies + msecs_to_jiffies(5000); s->task->sequential_io = i->sequential; @@ -1192,12 +1151,19 @@ found: add_sequential(s->task); } - rand = get_random_int(); - cutoff -= bitmap_weight(&rand, BITS_PER_LONG); + sectors = max(s->task->sequential_io, + s->task->sequential_io_avg) >> 9; - if (cutoff <= (int) (max(s->task->sequential_io, - s->task->sequential_io_avg) >> 9)) + if (dc->sequential_cutoff && + sectors >= dc->sequential_cutoff >> 9) { + trace_bcache_bypass_sequential(s->orig_bio); goto skip; + } + + if (congested && sectors >= congested) { + trace_bcache_bypass_congested(s->orig_bio); + goto skip; + } rescale: bch_rescale_priorities(c, bio_sectors(bio)); @@ -1288,30 +1254,25 @@ void bch_cached_dev_request_init(struct cached_dev *dc) static int flash_dev_cache_miss(struct btree *b, struct search *s, struct bio *bio, unsigned sectors) { + struct bio_vec *bv; + int i; + /* Zero fill bio */ - while (bio->bi_idx != bio->bi_vcnt) { - struct bio_vec *bv = bio_iovec(bio); + bio_for_each_segment(bv, bio, i) { unsigned j = min(bv->bv_len >> 9, sectors); void *p = kmap(bv->bv_page); memset(p + bv->bv_offset, 0, j << 9); kunmap(bv->bv_page); - bv->bv_len -= j << 9; - bv->bv_offset += j << 9; - - if (bv->bv_len) - return 0; - - bio->bi_sector += j; - bio->bi_size -= j << 9; - - bio->bi_idx++; - sectors -= j; + sectors -= j; } - s->op.lookup_done = true; + bio_advance(bio, min(sectors << 9, bio->bi_size)); + + if (!bio->bi_size) + s->op.lookup_done = true; return 0; } @@ -1338,8 +1299,8 @@ static void flash_dev_make_request(struct request_queue *q, struct bio *bio) closure_call(&s->op.cl, btree_read_async, NULL, cl); } else if (bio_has_data(bio) || s->op.skip) { bch_keybuf_check_overlapping(&s->op.c->moving_gc_keys, - &KEY(d->id, bio->bi_sector, 0), - &KEY(d->id, bio_end(bio), 0)); + &KEY(d->id, bio->bi_sector, 0), + &KEY(d->id, bio_end_sector(bio), 0)); s->writeback = true; s->op.cache_bio = bio; diff --git a/drivers/md/bcache/request.h b/drivers/md/bcache/request.h index 254d9ab5707c..57dc4784f4f4 100644 --- a/drivers/md/bcache/request.h +++ b/drivers/md/bcache/request.h @@ -30,7 +30,7 @@ struct search { }; void bch_cache_read_endio(struct bio *, int); -int bch_get_congested(struct cache_set *); +unsigned bch_get_congested(struct cache_set *); void bch_insert_data(struct closure *cl); void bch_btree_insert_async(struct closure *); void bch_cache_read_endio(struct bio *, int); diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c index f88e2b653a3f..547c4c57b052 100644 --- a/drivers/md/bcache/super.c +++ b/drivers/md/bcache/super.c @@ -10,10 +10,13 @@ #include "btree.h" #include "debug.h" #include "request.h" +#include "writeback.h" +#include <linux/blkdev.h> #include <linux/buffer_head.h> #include <linux/debugfs.h> #include <linux/genhd.h> +#include <linux/kthread.h> #include <linux/module.h> #include <linux/random.h> #include <linux/reboot.h> @@ -342,6 +345,7 @@ static void uuid_io(struct cache_set *c, unsigned long rw, struct closure *cl = &c->uuid_write.cl; struct uuid_entry *u; unsigned i; + char buf[80]; BUG_ON(!parent); closure_lock(&c->uuid_write, parent); @@ -362,8 +366,8 @@ static void uuid_io(struct cache_set *c, unsigned long rw, break; } - pr_debug("%s UUIDs at %s", rw & REQ_WRITE ? "wrote" : "read", - pkey(&c->uuid_bucket)); + bch_bkey_to_text(buf, sizeof(buf), k); + pr_debug("%s UUIDs at %s", rw & REQ_WRITE ? "wrote" : "read", buf); for (u = c->uuids; u < c->uuids + c->nr_uuids; u++) if (!bch_is_zero(u->uuid, 16)) @@ -543,7 +547,6 @@ void bch_prio_write(struct cache *ca) pr_debug("free %zu, free_inc %zu, unused %zu", fifo_used(&ca->free), fifo_used(&ca->free_inc), fifo_used(&ca->unused)); - blktrace_msg(ca, "Starting priorities: " buckets_free(ca)); for (i = prio_buckets(ca) - 1; i >= 0; --i) { long bucket; @@ -704,7 +707,8 @@ static void bcache_device_detach(struct bcache_device *d) atomic_set(&d->detaching, 0); } - bcache_device_unlink(d); + if (!d->flush_done) + bcache_device_unlink(d); d->c->devices[d->id] = NULL; closure_put(&d->c->caching); @@ -743,13 +747,35 @@ static void bcache_device_free(struct bcache_device *d) mempool_destroy(d->unaligned_bvec); if (d->bio_split) bioset_free(d->bio_split); + if (is_vmalloc_addr(d->stripe_sectors_dirty)) + vfree(d->stripe_sectors_dirty); + else + kfree(d->stripe_sectors_dirty); closure_debug_destroy(&d->cl); } -static int bcache_device_init(struct bcache_device *d, unsigned block_size) +static int bcache_device_init(struct bcache_device *d, unsigned block_size, + sector_t sectors) { struct request_queue *q; + size_t n; + + if (!d->stripe_size_bits) + d->stripe_size_bits = 31; + + d->nr_stripes = round_up(sectors, 1 << d->stripe_size_bits) >> + d->stripe_size_bits; + + if (!d->nr_stripes || d->nr_stripes > SIZE_MAX / sizeof(atomic_t)) + return -ENOMEM; + + n = d->nr_stripes * sizeof(atomic_t); + d->stripe_sectors_dirty = n < PAGE_SIZE << 6 + ? kzalloc(n, GFP_KERNEL) + : vzalloc(n); + if (!d->stripe_sectors_dirty) + return -ENOMEM; if (!(d->bio_split = bioset_create(4, offsetof(struct bbio, bio))) || !(d->unaligned_bvec = mempool_create_kmalloc_pool(1, @@ -759,6 +785,7 @@ static int bcache_device_init(struct bcache_device *d, unsigned block_size) !(q = blk_alloc_queue(GFP_KERNEL))) return -ENOMEM; + set_capacity(d->disk, sectors); snprintf(d->disk->disk_name, DISK_NAME_LEN, "bcache%i", bcache_minor); d->disk->major = bcache_major; @@ -781,6 +808,8 @@ static int bcache_device_init(struct bcache_device *d, unsigned block_size) set_bit(QUEUE_FLAG_NONROT, &d->disk->queue->queue_flags); set_bit(QUEUE_FLAG_DISCARD, &d->disk->queue->queue_flags); + blk_queue_flush(q, REQ_FLUSH|REQ_FUA); + return 0; } @@ -800,6 +829,17 @@ static void calc_cached_dev_sectors(struct cache_set *c) void bch_cached_dev_run(struct cached_dev *dc) { struct bcache_device *d = &dc->disk; + char buf[SB_LABEL_SIZE + 1]; + char *env[] = { + "DRIVER=bcache", + kasprintf(GFP_KERNEL, "CACHED_UUID=%pU", dc->sb.uuid), + NULL, + NULL, + }; + + memcpy(buf, dc->sb.label, SB_LABEL_SIZE); + buf[SB_LABEL_SIZE] = '\0'; + env[2] = kasprintf(GFP_KERNEL, "CACHED_LABEL=%s", buf); if (atomic_xchg(&dc->running, 1)) return; @@ -816,10 +856,12 @@ void bch_cached_dev_run(struct cached_dev *dc) add_disk(d->disk); bd_link_disk_holder(dc->bdev, dc->disk.disk); -#if 0 - char *env[] = { "SYMLINK=label" , NULL }; + /* won't show up in the uevent file, use udevadm monitor -e instead + * only class / kset properties are persistent */ kobject_uevent_env(&disk_to_dev(d->disk)->kobj, KOBJ_CHANGE, env); -#endif + kfree(env[1]); + kfree(env[2]); + if (sysfs_create_link(&d->kobj, &disk_to_dev(d->disk)->kobj, "dev") || sysfs_create_link(&disk_to_dev(d->disk)->kobj, &d->kobj, "bcache")) pr_debug("error creating sysfs link"); @@ -960,6 +1002,7 @@ int bch_cached_dev_attach(struct cached_dev *dc, struct cache_set *c) atomic_set(&dc->count, 1); if (BDEV_STATE(&dc->sb) == BDEV_STATE_DIRTY) { + bch_sectors_dirty_init(dc); atomic_set(&dc->has_dirty, 1); atomic_inc(&dc->count); bch_writeback_queue(dc); @@ -1014,6 +1057,14 @@ static void cached_dev_flush(struct closure *cl) struct cached_dev *dc = container_of(cl, struct cached_dev, disk.cl); struct bcache_device *d = &dc->disk; + mutex_lock(&bch_register_lock); + d->flush_done = 1; + + if (d->c) + bcache_device_unlink(d); + + mutex_unlock(&bch_register_lock); + bch_cache_accounting_destroy(&dc->accounting); kobject_del(&d->kobj); @@ -1045,7 +1096,8 @@ static int cached_dev_init(struct cached_dev *dc, unsigned block_size) hlist_add_head(&io->hash, dc->io_hash + RECENT_IO); } - ret = bcache_device_init(&dc->disk, block_size); + ret = bcache_device_init(&dc->disk, block_size, + dc->bdev->bd_part->nr_sects - dc->sb.data_offset); if (ret) return ret; @@ -1144,11 +1196,10 @@ static int flash_dev_run(struct cache_set *c, struct uuid_entry *u) kobject_init(&d->kobj, &bch_flash_dev_ktype); - if (bcache_device_init(d, block_bytes(c))) + if (bcache_device_init(d, block_bytes(c), u->sectors)) goto err; bcache_device_attach(d, c, u - c->uuids); - set_capacity(d->disk, u->sectors); bch_flash_dev_request_init(d); add_disk(d->disk); @@ -1255,9 +1306,10 @@ static void cache_set_free(struct closure *cl) free_pages((unsigned long) c->uuids, ilog2(bucket_pages(c))); free_pages((unsigned long) c->sort, ilog2(bucket_pages(c))); - kfree(c->fill_iter); if (c->bio_split) bioset_free(c->bio_split); + if (c->fill_iter) + mempool_destroy(c->fill_iter); if (c->bio_meta) mempool_destroy(c->bio_meta); if (c->search) @@ -1278,11 +1330,9 @@ static void cache_set_free(struct closure *cl) static void cache_set_flush(struct closure *cl) { struct cache_set *c = container_of(cl, struct cache_set, caching); + struct cache *ca; struct btree *b; - - /* Shut down allocator threads */ - set_bit(CACHE_SET_STOPPING_2, &c->flags); - wake_up(&c->alloc_wait); + unsigned i; bch_cache_accounting_destroy(&c->accounting); @@ -1295,7 +1345,11 @@ static void cache_set_flush(struct closure *cl) /* Should skip this if we're unregistering because of an error */ list_for_each_entry(b, &c->btree_cache, list) if (btree_node_dirty(b)) - bch_btree_write(b, true, NULL); + bch_btree_node_write(b, NULL); + + for_each_cache(ca, c, i) + if (ca->alloc_thread) + kthread_stop(ca->alloc_thread); closure_return(cl); } @@ -1303,18 +1357,22 @@ static void cache_set_flush(struct closure *cl) static void __cache_set_unregister(struct closure *cl) { struct cache_set *c = container_of(cl, struct cache_set, caching); - struct cached_dev *dc, *t; + struct cached_dev *dc; size_t i; mutex_lock(&bch_register_lock); - if (test_bit(CACHE_SET_UNREGISTERING, &c->flags)) - list_for_each_entry_safe(dc, t, &c->cached_devs, list) - bch_cached_dev_detach(dc); - for (i = 0; i < c->nr_uuids; i++) - if (c->devices[i] && UUID_FLASH_ONLY(&c->uuids[i])) - bcache_device_stop(c->devices[i]); + if (c->devices[i]) { + if (!UUID_FLASH_ONLY(&c->uuids[i]) && + test_bit(CACHE_SET_UNREGISTERING, &c->flags)) { + dc = container_of(c->devices[i], + struct cached_dev, disk); + bch_cached_dev_detach(dc); + } else { + bcache_device_stop(c->devices[i]); + } + } mutex_unlock(&bch_register_lock); @@ -1373,9 +1431,9 @@ struct cache_set *bch_cache_set_alloc(struct cache_sb *sb) c->btree_pages = max_t(int, c->btree_pages / 4, BTREE_MAX_PAGES); - init_waitqueue_head(&c->alloc_wait); + c->sort_crit_factor = int_sqrt(c->btree_pages); + mutex_init(&c->bucket_lock); - mutex_init(&c->fill_lock); mutex_init(&c->sort_lock); spin_lock_init(&c->sort_time_lock); closure_init_unlocked(&c->sb_write); @@ -1401,8 +1459,8 @@ struct cache_set *bch_cache_set_alloc(struct cache_sb *sb) !(c->bio_meta = mempool_create_kmalloc_pool(2, sizeof(struct bbio) + sizeof(struct bio_vec) * bucket_pages(c))) || + !(c->fill_iter = mempool_create_kmalloc_pool(1, iter_size)) || !(c->bio_split = bioset_create(4, offsetof(struct bbio, bio))) || - !(c->fill_iter = kmalloc(iter_size, GFP_KERNEL)) || !(c->sort = alloc_bucket_pages(GFP_KERNEL, c)) || !(c->uuids = alloc_bucket_pages(GFP_KERNEL, c)) || bch_journal_alloc(c) || @@ -1410,8 +1468,6 @@ struct cache_set *bch_cache_set_alloc(struct cache_sb *sb) bch_open_buckets_alloc(c)) goto err; - c->fill_iter->size = sb->bucket_size / sb->block_size; - c->congested_read_threshold_us = 2000; c->congested_write_threshold_us = 20000; c->error_limit = 8 << IO_ERROR_SHIFT; @@ -1496,9 +1552,10 @@ static void run_cache_set(struct cache_set *c) */ bch_journal_next(&c->journal); + err = "error starting allocator thread"; for_each_cache(ca, c, i) - closure_call(&ca->alloc, bch_allocator_thread, - system_wq, &c->cl); + if (bch_cache_allocator_start(ca)) + goto err; /* * First place it's safe to allocate: btree_check() and @@ -1531,17 +1588,16 @@ static void run_cache_set(struct cache_set *c) bch_btree_gc_finish(c); + err = "error starting allocator thread"; for_each_cache(ca, c, i) - closure_call(&ca->alloc, bch_allocator_thread, - ca->alloc_workqueue, &c->cl); + if (bch_cache_allocator_start(ca)) + goto err; mutex_lock(&c->bucket_lock); for_each_cache(ca, c, i) bch_prio_write(ca); mutex_unlock(&c->bucket_lock); - wake_up(&c->alloc_wait); - err = "cannot allocate new UUID bucket"; if (__uuid_write(c)) goto err_unlock_gc; @@ -1552,7 +1608,7 @@ static void run_cache_set(struct cache_set *c) goto err_unlock_gc; bkey_copy_key(&c->root->key, &MAX_KEY); - bch_btree_write(c->root, true, &op); + bch_btree_node_write(c->root, &op.cl); bch_btree_set_root(c->root); rw_unlock(true, c->root); @@ -1673,9 +1729,6 @@ void bch_cache_release(struct kobject *kobj) bio_split_pool_free(&ca->bio_split_hook); - if (ca->alloc_workqueue) - destroy_workqueue(ca->alloc_workqueue); - free_pages((unsigned long) ca->disk_buckets, ilog2(bucket_pages(ca))); kfree(ca->prio_buckets); vfree(ca->buckets); @@ -1723,7 +1776,6 @@ static int cache_alloc(struct cache_sb *sb, struct cache *ca) !(ca->prio_buckets = kzalloc(sizeof(uint64_t) * prio_buckets(ca) * 2, GFP_KERNEL)) || !(ca->disk_buckets = alloc_bucket_pages(GFP_KERNEL, ca)) || - !(ca->alloc_workqueue = alloc_workqueue("bch_allocator", 0, 1)) || bio_split_pool_init(&ca->bio_split_hook)) return -ENOMEM; @@ -1786,6 +1838,36 @@ static ssize_t register_bcache(struct kobject *, struct kobj_attribute *, kobj_attribute_write(register, register_bcache); kobj_attribute_write(register_quiet, register_bcache); +static bool bch_is_open_backing(struct block_device *bdev) { + struct cache_set *c, *tc; + struct cached_dev *dc, *t; + + list_for_each_entry_safe(c, tc, &bch_cache_sets, list) + list_for_each_entry_safe(dc, t, &c->cached_devs, list) + if (dc->bdev == bdev) + return true; + list_for_each_entry_safe(dc, t, &uncached_devices, list) + if (dc->bdev == bdev) + return true; + return false; +} + +static bool bch_is_open_cache(struct block_device *bdev) { + struct cache_set *c, *tc; + struct cache *ca; + unsigned i; + + list_for_each_entry_safe(c, tc, &bch_cache_sets, list) + for_each_cache(ca, c, i) + if (ca->bdev == bdev) + return true; + return false; +} + +static bool bch_is_open(struct block_device *bdev) { + return bch_is_open_cache(bdev) || bch_is_open_backing(bdev); +} + static ssize_t register_bcache(struct kobject *k, struct kobj_attribute *attr, const char *buffer, size_t size) { @@ -1810,8 +1892,13 @@ static ssize_t register_bcache(struct kobject *k, struct kobj_attribute *attr, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); if (IS_ERR(bdev)) { - if (bdev == ERR_PTR(-EBUSY)) - err = "device busy"; + if (bdev == ERR_PTR(-EBUSY)) { + bdev = lookup_bdev(strim(path)); + if (!IS_ERR(bdev) && bch_is_open(bdev)) + err = "device already registered"; + else + err = "device busy"; + } goto err; } diff --git a/drivers/md/bcache/sysfs.c b/drivers/md/bcache/sysfs.c index 4d9cca47e4c6..12a2c2846f99 100644 --- a/drivers/md/bcache/sysfs.c +++ b/drivers/md/bcache/sysfs.c @@ -9,7 +9,9 @@ #include "sysfs.h" #include "btree.h" #include "request.h" +#include "writeback.h" +#include <linux/blkdev.h> #include <linux/sort.h> static const char * const cache_replacement_policies[] = { @@ -79,6 +81,9 @@ rw_attribute(writeback_rate_p_term_inverse); rw_attribute(writeback_rate_d_smooth); read_attribute(writeback_rate_debug); +read_attribute(stripe_size); +read_attribute(partial_stripes_expensive); + rw_attribute(synchronous); rw_attribute(journal_delay_ms); rw_attribute(discard); @@ -127,7 +132,7 @@ SHOW(__bch_cached_dev) char derivative[20]; char target[20]; bch_hprint(dirty, - atomic_long_read(&dc->disk.sectors_dirty) << 9); + bcache_dev_sectors_dirty(&dc->disk) << 9); bch_hprint(derivative, dc->writeback_rate_derivative << 9); bch_hprint(target, dc->writeback_rate_target << 9); @@ -143,7 +148,10 @@ SHOW(__bch_cached_dev) } sysfs_hprint(dirty_data, - atomic_long_read(&dc->disk.sectors_dirty) << 9); + bcache_dev_sectors_dirty(&dc->disk) << 9); + + sysfs_hprint(stripe_size, (1 << dc->disk.stripe_size_bits) << 9); + var_printf(partial_stripes_expensive, "%u"); var_printf(sequential_merge, "%i"); var_hprint(sequential_cutoff); @@ -170,6 +178,7 @@ STORE(__cached_dev) disk.kobj); unsigned v = size; struct cache_set *c; + struct kobj_uevent_env *env; #define d_strtoul(var) sysfs_strtoul(var, dc->var) #define d_strtoi_h(var) sysfs_hatoi(var, dc->var) @@ -214,6 +223,7 @@ STORE(__cached_dev) } if (attr == &sysfs_label) { + /* note: endlines are preserved */ memcpy(dc->sb.label, buf, SB_LABEL_SIZE); bch_write_bdev_super(dc, NULL); if (dc->disk.c) { @@ -221,6 +231,15 @@ STORE(__cached_dev) buf, SB_LABEL_SIZE); bch_uuid_write(dc->disk.c); } + env = kzalloc(sizeof(struct kobj_uevent_env), GFP_KERNEL); + if (!env) + return -ENOMEM; + add_uevent_var(env, "DRIVER=bcache"); + add_uevent_var(env, "CACHED_UUID=%pU", dc->sb.uuid), + add_uevent_var(env, "CACHED_LABEL=%s", buf); + kobject_uevent_env( + &disk_to_dev(dc->disk.disk)->kobj, KOBJ_CHANGE, env->envp); + kfree(env); } if (attr == &sysfs_attach) { @@ -284,6 +303,8 @@ static struct attribute *bch_cached_dev_files[] = { &sysfs_writeback_rate_d_smooth, &sysfs_writeback_rate_debug, &sysfs_dirty_data, + &sysfs_stripe_size, + &sysfs_partial_stripes_expensive, &sysfs_sequential_cutoff, &sysfs_sequential_merge, &sysfs_clear_stats, @@ -665,12 +686,10 @@ SHOW(__bch_cache) int cmp(const void *l, const void *r) { return *((uint16_t *) r) - *((uint16_t *) l); } - /* Number of quantiles we compute */ - const unsigned nq = 31; - size_t n = ca->sb.nbuckets, i, unused, btree; uint64_t sum = 0; - uint16_t q[nq], *p, *cached; + /* Compute 31 quantiles */ + uint16_t q[31], *p, *cached; ssize_t ret; cached = p = vmalloc(ca->sb.nbuckets * sizeof(uint16_t)); @@ -703,26 +722,29 @@ SHOW(__bch_cache) if (n) do_div(sum, n); - for (i = 0; i < nq; i++) - q[i] = INITIAL_PRIO - cached[n * (i + 1) / (nq + 1)]; + for (i = 0; i < ARRAY_SIZE(q); i++) + q[i] = INITIAL_PRIO - cached[n * (i + 1) / + (ARRAY_SIZE(q) + 1)]; vfree(p); - ret = snprintf(buf, PAGE_SIZE, - "Unused: %zu%%\n" - "Metadata: %zu%%\n" - "Average: %llu\n" - "Sectors per Q: %zu\n" - "Quantiles: [", - unused * 100 / (size_t) ca->sb.nbuckets, - btree * 100 / (size_t) ca->sb.nbuckets, sum, - n * ca->sb.bucket_size / (nq + 1)); - - for (i = 0; i < nq && ret < (ssize_t) PAGE_SIZE; i++) - ret += snprintf(buf + ret, PAGE_SIZE - ret, - i < nq - 1 ? "%u " : "%u]\n", q[i]); - - buf[PAGE_SIZE - 1] = '\0'; + ret = scnprintf(buf, PAGE_SIZE, + "Unused: %zu%%\n" + "Metadata: %zu%%\n" + "Average: %llu\n" + "Sectors per Q: %zu\n" + "Quantiles: [", + unused * 100 / (size_t) ca->sb.nbuckets, + btree * 100 / (size_t) ca->sb.nbuckets, sum, + n * ca->sb.bucket_size / (ARRAY_SIZE(q) + 1)); + + for (i = 0; i < ARRAY_SIZE(q); i++) + ret += scnprintf(buf + ret, PAGE_SIZE - ret, + "%u ", q[i]); + ret--; + + ret += scnprintf(buf + ret, PAGE_SIZE - ret, "]\n"); + return ret; } diff --git a/drivers/md/bcache/trace.c b/drivers/md/bcache/trace.c index 983f9bb411bc..f7b6c197f90f 100644 --- a/drivers/md/bcache/trace.c +++ b/drivers/md/bcache/trace.c @@ -2,6 +2,7 @@ #include "btree.h" #include "request.h" +#include <linux/blktrace_api.h> #include <linux/module.h> #define CREATE_TRACE_POINTS @@ -9,18 +10,44 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_request_start); EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_request_end); -EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_passthrough); -EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_cache_hit); -EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_cache_miss); + +EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_bypass_sequential); +EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_bypass_congested); + +EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_read); +EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_write); EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_read_retry); -EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_writethrough); -EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_writeback); -EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_write_skip); + +EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_cache_insert); + +EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_journal_replay_key); +EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_journal_write); +EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_journal_full); +EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_journal_entry_full); + +EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_btree_cache_cannibalize); + EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_btree_read); EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_btree_write); -EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_write_dirty); -EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_read_dirty); -EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_journal_write); -EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_cache_insert); + +EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_btree_node_alloc); +EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_btree_node_alloc_fail); +EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_btree_node_free); + +EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_btree_gc_coalesce); EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_gc_start); EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_gc_end); +EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_gc_copy); +EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_gc_copy_collision); + +EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_btree_insert_key); + +EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_btree_node_split); +EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_btree_node_compact); +EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_btree_set_root); + +EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_alloc_invalidate); +EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_alloc_fail); + +EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_writeback); +EXPORT_TRACEPOINT_SYMBOL_GPL(bcache_writeback_collision); diff --git a/drivers/md/bcache/util.c b/drivers/md/bcache/util.c index da3a99e85b1e..98eb81159a22 100644 --- a/drivers/md/bcache/util.c +++ b/drivers/md/bcache/util.c @@ -228,23 +228,6 @@ start: bv->bv_len = min_t(size_t, PAGE_SIZE - bv->bv_offset, } } -int bch_bio_alloc_pages(struct bio *bio, gfp_t gfp) -{ - int i; - struct bio_vec *bv; - - bio_for_each_segment(bv, bio, i) { - bv->bv_page = alloc_page(gfp); - if (!bv->bv_page) { - while (bv-- != bio->bi_io_vec + bio->bi_idx) - __free_page(bv->bv_page); - return -ENOMEM; - } - } - - return 0; -} - /* * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group (Any * use permitted, subject to terms of PostgreSQL license; see.) diff --git a/drivers/md/bcache/util.h b/drivers/md/bcache/util.h index 577393e38c3a..1ae2a73ad85f 100644 --- a/drivers/md/bcache/util.h +++ b/drivers/md/bcache/util.h @@ -15,8 +15,6 @@ struct closure; -#include <trace/events/bcache.h> - #ifdef CONFIG_BCACHE_EDEBUG #define atomic_dec_bug(v) BUG_ON(atomic_dec_return(v) < 0) @@ -566,12 +564,8 @@ static inline unsigned fract_exp_two(unsigned x, unsigned fract_bits) return x; } -#define bio_end(bio) ((bio)->bi_sector + bio_sectors(bio)) - void bch_bio_map(struct bio *bio, void *base); -int bch_bio_alloc_pages(struct bio *bio, gfp_t gfp); - static inline sector_t bdev_sectors(struct block_device *bdev) { return bdev->bd_inode->i_size >> 9; diff --git a/drivers/md/bcache/writeback.c b/drivers/md/bcache/writeback.c index 2714ed3991d1..22cbff551628 100644 --- a/drivers/md/bcache/writeback.c +++ b/drivers/md/bcache/writeback.c @@ -9,6 +9,9 @@ #include "bcache.h" #include "btree.h" #include "debug.h" +#include "writeback.h" + +#include <trace/events/bcache.h> static struct workqueue_struct *dirty_wq; @@ -36,7 +39,7 @@ static void __update_writeback_rate(struct cached_dev *dc) int change = 0; int64_t error; - int64_t dirty = atomic_long_read(&dc->disk.sectors_dirty); + int64_t dirty = bcache_dev_sectors_dirty(&dc->disk); int64_t derivative = dirty - dc->disk.sectors_dirty_last; dc->disk.sectors_dirty_last = dirty; @@ -105,6 +108,31 @@ static bool dirty_pred(struct keybuf *buf, struct bkey *k) return KEY_DIRTY(k); } +static bool dirty_full_stripe_pred(struct keybuf *buf, struct bkey *k) +{ + uint64_t stripe; + unsigned nr_sectors = KEY_SIZE(k); + struct cached_dev *dc = container_of(buf, struct cached_dev, + writeback_keys); + unsigned stripe_size = 1 << dc->disk.stripe_size_bits; + + if (!KEY_DIRTY(k)) + return false; + + stripe = KEY_START(k) >> dc->disk.stripe_size_bits; + while (1) { + if (atomic_read(dc->disk.stripe_sectors_dirty + stripe) != + stripe_size) + return false; + + if (nr_sectors <= stripe_size) + return true; + + nr_sectors -= stripe_size; + stripe++; + } +} + static void dirty_init(struct keybuf_key *w) { struct dirty_io *io = w->private; @@ -149,7 +177,22 @@ static void refill_dirty(struct closure *cl) searched_from_start = true; } - bch_refill_keybuf(dc->disk.c, buf, &end); + if (dc->partial_stripes_expensive) { + uint64_t i; + + for (i = 0; i < dc->disk.nr_stripes; i++) + if (atomic_read(dc->disk.stripe_sectors_dirty + i) == + 1 << dc->disk.stripe_size_bits) + goto full_stripes; + + goto normal_refill; +full_stripes: + bch_refill_keybuf(dc->disk.c, buf, &end, + dirty_full_stripe_pred); + } else { +normal_refill: + bch_refill_keybuf(dc->disk.c, buf, &end, dirty_pred); + } if (bkey_cmp(&buf->last_scanned, &end) >= 0 && searched_from_start) { /* Searched the entire btree - delay awhile */ @@ -181,10 +224,8 @@ void bch_writeback_queue(struct cached_dev *dc) } } -void bch_writeback_add(struct cached_dev *dc, unsigned sectors) +void bch_writeback_add(struct cached_dev *dc) { - atomic_long_add(sectors, &dc->disk.sectors_dirty); - if (!atomic_read(&dc->has_dirty) && !atomic_xchg(&dc->has_dirty, 1)) { atomic_inc(&dc->count); @@ -203,6 +244,34 @@ void bch_writeback_add(struct cached_dev *dc, unsigned sectors) } } +void bcache_dev_sectors_dirty_add(struct cache_set *c, unsigned inode, + uint64_t offset, int nr_sectors) +{ + struct bcache_device *d = c->devices[inode]; + unsigned stripe_size, stripe_offset; + uint64_t stripe; + + if (!d) + return; + + stripe_size = 1 << d->stripe_size_bits; + stripe = offset >> d->stripe_size_bits; + stripe_offset = offset & (stripe_size - 1); + + while (nr_sectors) { + int s = min_t(unsigned, abs(nr_sectors), + stripe_size - stripe_offset); + + if (nr_sectors < 0) + s = -s; + + atomic_add(s, d->stripe_sectors_dirty + stripe); + nr_sectors -= s; + stripe_offset = 0; + stripe++; + } +} + /* Background writeback - IO loop */ static void dirty_io_destructor(struct closure *cl) @@ -216,9 +285,10 @@ static void write_dirty_finish(struct closure *cl) struct dirty_io *io = container_of(cl, struct dirty_io, cl); struct keybuf_key *w = io->bio.bi_private; struct cached_dev *dc = io->dc; - struct bio_vec *bv = bio_iovec_idx(&io->bio, io->bio.bi_vcnt); + struct bio_vec *bv; + int i; - while (bv-- != io->bio.bi_io_vec) + bio_for_each_segment_all(bv, &io->bio, i) __free_page(bv->bv_page); /* This is kind of a dumb way of signalling errors. */ @@ -236,10 +306,12 @@ static void write_dirty_finish(struct closure *cl) for (i = 0; i < KEY_PTRS(&w->key); i++) atomic_inc(&PTR_BUCKET(dc->disk.c, &w->key, i)->pin); - pr_debug("clearing %s", pkey(&w->key)); bch_btree_insert(&op, dc->disk.c); closure_sync(&op.cl); + if (op.insert_collision) + trace_bcache_writeback_collision(&w->key); + atomic_long_inc(op.insert_collision ? &dc->disk.c->writeback_keys_failed : &dc->disk.c->writeback_keys_done); @@ -275,7 +347,6 @@ static void write_dirty(struct closure *cl) io->bio.bi_bdev = io->dc->bdev; io->bio.bi_end_io = dirty_endio; - trace_bcache_write_dirty(&io->bio); closure_bio_submit(&io->bio, cl, &io->dc->disk); continue_at(cl, write_dirty_finish, dirty_wq); @@ -296,7 +367,6 @@ static void read_dirty_submit(struct closure *cl) { struct dirty_io *io = container_of(cl, struct dirty_io, cl); - trace_bcache_read_dirty(&io->bio); closure_bio_submit(&io->bio, cl, &io->dc->disk); continue_at(cl, write_dirty, dirty_wq); @@ -349,10 +419,10 @@ static void read_dirty(struct closure *cl) io->bio.bi_rw = READ; io->bio.bi_end_io = read_dirty_endio; - if (bch_bio_alloc_pages(&io->bio, GFP_KERNEL)) + if (bio_alloc_pages(&io->bio, GFP_KERNEL)) goto err_free; - pr_debug("%s", pkey(&w->key)); + trace_bcache_writeback(&w->key); closure_call(&io->cl, read_dirty_submit, NULL, &dc->disk.cl); @@ -375,12 +445,49 @@ err: refill_dirty(cl); } +/* Init */ + +static int bch_btree_sectors_dirty_init(struct btree *b, struct btree_op *op, + struct cached_dev *dc) +{ + struct bkey *k; + struct btree_iter iter; + + bch_btree_iter_init(b, &iter, &KEY(dc->disk.id, 0, 0)); + while ((k = bch_btree_iter_next_filter(&iter, b, bch_ptr_bad))) + if (!b->level) { + if (KEY_INODE(k) > dc->disk.id) + break; + + if (KEY_DIRTY(k)) + bcache_dev_sectors_dirty_add(b->c, dc->disk.id, + KEY_START(k), + KEY_SIZE(k)); + } else { + btree(sectors_dirty_init, k, b, op, dc); + if (KEY_INODE(k) > dc->disk.id) + break; + + cond_resched(); + } + + return 0; +} + +void bch_sectors_dirty_init(struct cached_dev *dc) +{ + struct btree_op op; + + bch_btree_op_init_stack(&op); + btree_root(sectors_dirty_init, dc->disk.c, &op, dc); +} + void bch_cached_dev_writeback_init(struct cached_dev *dc) { closure_init_unlocked(&dc->writeback); init_rwsem(&dc->writeback_lock); - bch_keybuf_init(&dc->writeback_keys, dirty_pred); + bch_keybuf_init(&dc->writeback_keys); dc->writeback_metadata = true; dc->writeback_running = true; diff --git a/drivers/md/bcache/writeback.h b/drivers/md/bcache/writeback.h new file mode 100644 index 000000000000..c91f61bb95b6 --- /dev/null +++ b/drivers/md/bcache/writeback.h @@ -0,0 +1,64 @@ +#ifndef _BCACHE_WRITEBACK_H +#define _BCACHE_WRITEBACK_H + +#define CUTOFF_WRITEBACK 40 +#define CUTOFF_WRITEBACK_SYNC 70 + +static inline uint64_t bcache_dev_sectors_dirty(struct bcache_device *d) +{ + uint64_t i, ret = 0; + + for (i = 0; i < d->nr_stripes; i++) + ret += atomic_read(d->stripe_sectors_dirty + i); + + return ret; +} + +static inline bool bcache_dev_stripe_dirty(struct bcache_device *d, + uint64_t offset, + unsigned nr_sectors) +{ + uint64_t stripe = offset >> d->stripe_size_bits; + + while (1) { + if (atomic_read(d->stripe_sectors_dirty + stripe)) + return true; + + if (nr_sectors <= 1 << d->stripe_size_bits) + return false; + + nr_sectors -= 1 << d->stripe_size_bits; + stripe++; + } +} + +static inline bool should_writeback(struct cached_dev *dc, struct bio *bio, + unsigned cache_mode, bool would_skip) +{ + unsigned in_use = dc->disk.c->gc_stats.in_use; + + if (cache_mode != CACHE_MODE_WRITEBACK || + atomic_read(&dc->disk.detaching) || + in_use > CUTOFF_WRITEBACK_SYNC) + return false; + + if (dc->partial_stripes_expensive && + bcache_dev_stripe_dirty(&dc->disk, bio->bi_sector, + bio_sectors(bio))) + return true; + + if (would_skip) + return false; + + return bio->bi_rw & REQ_SYNC || + in_use <= CUTOFF_WRITEBACK; +} + +void bcache_dev_sectors_dirty_add(struct cache_set *, unsigned, uint64_t, int); +void bch_writeback_queue(struct cached_dev *); +void bch_writeback_add(struct cached_dev *); + +void bch_sectors_dirty_init(struct cached_dev *dc); +void bch_cached_dev_writeback_init(struct cached_dev *); + +#endif diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index 957a719e8c2f..df7b0a06b0ea 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -2290,12 +2290,18 @@ static void recovery_request_write(struct mddev *mddev, struct r10bio *r10_bio) d = r10_bio->devs[1].devnum; wbio = r10_bio->devs[1].bio; wbio2 = r10_bio->devs[1].repl_bio; + /* Need to test wbio2->bi_end_io before we call + * generic_make_request as if the former is NULL, + * the latter is free to free wbio2. + */ + if (wbio2 && !wbio2->bi_end_io) + wbio2 = NULL; if (wbio->bi_end_io) { atomic_inc(&conf->mirrors[d].rdev->nr_pending); md_sync_acct(conf->mirrors[d].rdev->bdev, bio_sectors(wbio)); generic_make_request(wbio); } - if (wbio2 && wbio2->bi_end_io) { + if (wbio2) { atomic_inc(&conf->mirrors[d].replacement->nr_pending); md_sync_acct(conf->mirrors[d].replacement->bdev, bio_sectors(wbio2)); diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index 2bf094a587cb..78ea44336e75 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -3462,6 +3462,7 @@ static void handle_stripe(struct stripe_head *sh) test_and_clear_bit(STRIPE_SYNC_REQUESTED, &sh->state)) { set_bit(STRIPE_SYNCING, &sh->state); clear_bit(STRIPE_INSYNC, &sh->state); + clear_bit(STRIPE_REPLACED, &sh->state); } spin_unlock(&sh->stripe_lock); } @@ -3607,19 +3608,23 @@ static void handle_stripe(struct stripe_head *sh) handle_parity_checks5(conf, sh, &s, disks); } - if (s.replacing && s.locked == 0 - && !test_bit(STRIPE_INSYNC, &sh->state)) { + if ((s.replacing || s.syncing) && s.locked == 0 + && !test_bit(STRIPE_COMPUTE_RUN, &sh->state) + && !test_bit(STRIPE_REPLACED, &sh->state)) { /* Write out to replacement devices where possible */ for (i = 0; i < conf->raid_disks; i++) - if (test_bit(R5_UPTODATE, &sh->dev[i].flags) && - test_bit(R5_NeedReplace, &sh->dev[i].flags)) { + if (test_bit(R5_NeedReplace, &sh->dev[i].flags)) { + WARN_ON(!test_bit(R5_UPTODATE, &sh->dev[i].flags)); set_bit(R5_WantReplace, &sh->dev[i].flags); set_bit(R5_LOCKED, &sh->dev[i].flags); s.locked++; } - set_bit(STRIPE_INSYNC, &sh->state); + if (s.replacing) + set_bit(STRIPE_INSYNC, &sh->state); + set_bit(STRIPE_REPLACED, &sh->state); } if ((s.syncing || s.replacing) && s.locked == 0 && + !test_bit(STRIPE_COMPUTE_RUN, &sh->state) && test_bit(STRIPE_INSYNC, &sh->state)) { md_done_sync(conf->mddev, STRIPE_SECTORS, 1); clear_bit(STRIPE_SYNCING, &sh->state); diff --git a/drivers/md/raid5.h b/drivers/md/raid5.h index b0b663b119a8..70c49329ca9a 100644 --- a/drivers/md/raid5.h +++ b/drivers/md/raid5.h @@ -306,6 +306,7 @@ enum { STRIPE_SYNC_REQUESTED, STRIPE_SYNCING, STRIPE_INSYNC, + STRIPE_REPLACED, STRIPE_PREREAD_ACTIVE, STRIPE_DELAYED, STRIPE_DEGRADED, diff --git a/drivers/of/irq.c b/drivers/of/irq.c index a3c1c5aae6a9..1264923ade0f 100644 --- a/drivers/of/irq.c +++ b/drivers/of/irq.c @@ -345,6 +345,7 @@ int of_irq_to_resource(struct device_node *dev, int index, struct resource *r) if (r && irq) { const char *name = NULL; + memset(r, 0, sizeof(*r)); /* * Get optional "interrupts-names" property to add a name * to the resource. @@ -482,8 +483,9 @@ void __init of_irq_init(const struct of_device_id *matches) } /* Get the next pending parent that might have children */ - desc = list_first_entry(&intc_parent_list, typeof(*desc), list); - if (list_empty(&intc_parent_list) || !desc) { + desc = list_first_entry_or_null(&intc_parent_list, + typeof(*desc), list); + if (!desc) { pr_err("of_irq_init: children remain, but no parents\n"); break; } diff --git a/drivers/pci/hotplug/rpadlpar_core.c b/drivers/pci/hotplug/rpadlpar_core.c index b29e20b7862f..bb7af78e4eed 100644 --- a/drivers/pci/hotplug/rpadlpar_core.c +++ b/drivers/pci/hotplug/rpadlpar_core.c @@ -388,7 +388,6 @@ int dlpar_remove_pci_slot(char *drc_name, struct device_node *dn) /* Remove the EADS bridge device itself */ BUG_ON(!bus->self); pr_debug("PCI: Now removing bridge device %s\n", pci_name(bus->self)); - eeh_remove_bus_device(bus->self, true); pci_stop_and_remove_bus_device(bus->self); return 0; diff --git a/drivers/thermal/x86_pkg_temp_thermal.c b/drivers/thermal/x86_pkg_temp_thermal.c index 5de56f671a9d..f36950e4134f 100644 --- a/drivers/thermal/x86_pkg_temp_thermal.c +++ b/drivers/thermal/x86_pkg_temp_thermal.c @@ -54,6 +54,8 @@ MODULE_PARM_DESC(notify_delay_ms, * is some wrong values returned by cpuid for number of thresholds. */ #define MAX_NUMBER_OF_TRIPS 2 +/* Limit number of package temp zones */ +#define MAX_PKG_TEMP_ZONE_IDS 256 struct phy_dev_entry { struct list_head list; @@ -394,12 +396,16 @@ static int pkg_temp_thermal_device_add(unsigned int cpu) char buffer[30]; int thres_count; u32 eax, ebx, ecx, edx; + u8 *temp; cpuid(6, &eax, &ebx, &ecx, &edx); thres_count = ebx & 0x07; if (!thres_count) return -ENODEV; + if (topology_physical_package_id(cpu) > MAX_PKG_TEMP_ZONE_IDS) + return -ENODEV; + thres_count = clamp_val(thres_count, 0, MAX_NUMBER_OF_TRIPS); err = get_tj_max(cpu, &tj_max); @@ -417,13 +423,14 @@ static int pkg_temp_thermal_device_add(unsigned int cpu) spin_lock(&pkg_work_lock); if (topology_physical_package_id(cpu) > max_phy_id) max_phy_id = topology_physical_package_id(cpu); - pkg_work_scheduled = krealloc(pkg_work_scheduled, - (max_phy_id+1) * sizeof(u8), GFP_ATOMIC); - if (!pkg_work_scheduled) { + temp = krealloc(pkg_work_scheduled, + (max_phy_id+1) * sizeof(u8), GFP_ATOMIC); + if (!temp) { spin_unlock(&pkg_work_lock); err = -ENOMEM; goto err_ret_free; } + pkg_work_scheduled = temp; pkg_work_scheduled[topology_physical_package_id(cpu)] = 0; spin_unlock(&pkg_work_lock); @@ -511,7 +518,7 @@ static int get_core_online(unsigned int cpu) /* Check if there is already an instance for this package */ if (!phdev) { - if (!cpu_has(c, X86_FEATURE_DTHERM) && + if (!cpu_has(c, X86_FEATURE_DTHERM) || !cpu_has(c, X86_FEATURE_PTS)) return -ENODEV; if (pkg_temp_thermal_device_add(cpu)) @@ -562,7 +569,7 @@ static struct notifier_block pkg_temp_thermal_notifier __refdata = { }; static const struct x86_cpu_id __initconst pkg_temp_thermal_ids[] = { - { X86_VENDOR_INTEL, X86_FAMILY_ANY, X86_MODEL_ANY, X86_FEATURE_DTHERM }, + { X86_VENDOR_INTEL, X86_FAMILY_ANY, X86_MODEL_ANY, X86_FEATURE_PTS }, {} }; MODULE_DEVICE_TABLE(x86cpu, pkg_temp_thermal_ids); @@ -592,7 +599,6 @@ static int __init pkg_temp_thermal_init(void) return 0; err_ret: - get_online_cpus(); for_each_online_cpu(i) put_core_offline(i); put_online_cpus(); diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c index 027be91db139..969a85960e9f 100644 --- a/drivers/vhost/net.c +++ b/drivers/vhost/net.c @@ -15,7 +15,6 @@ #include <linux/moduleparam.h> #include <linux/mutex.h> #include <linux/workqueue.h> -#include <linux/rcupdate.h> #include <linux/file.h> #include <linux/slab.h> @@ -346,12 +345,11 @@ static void handle_tx(struct vhost_net *net) struct vhost_net_ubuf_ref *uninitialized_var(ubufs); bool zcopy, zcopy_used; - /* TODO: check that we are running from vhost_worker? */ - sock = rcu_dereference_check(vq->private_data, 1); + mutex_lock(&vq->mutex); + sock = vq->private_data; if (!sock) - return; + goto out; - mutex_lock(&vq->mutex); vhost_disable_notify(&net->dev, vq); hdr_size = nvq->vhost_hlen; @@ -461,7 +459,7 @@ static void handle_tx(struct vhost_net *net) break; } } - +out: mutex_unlock(&vq->mutex); } @@ -570,14 +568,14 @@ static void handle_rx(struct vhost_net *net) s16 headcount; size_t vhost_hlen, sock_hlen; size_t vhost_len, sock_len; - /* TODO: check that we are running from vhost_worker? */ - struct socket *sock = rcu_dereference_check(vq->private_data, 1); - - if (!sock) - return; + struct socket *sock; mutex_lock(&vq->mutex); + sock = vq->private_data; + if (!sock) + goto out; vhost_disable_notify(&net->dev, vq); + vhost_hlen = nvq->vhost_hlen; sock_hlen = nvq->sock_hlen; @@ -652,7 +650,7 @@ static void handle_rx(struct vhost_net *net) break; } } - +out: mutex_unlock(&vq->mutex); } @@ -750,8 +748,7 @@ static int vhost_net_enable_vq(struct vhost_net *n, struct vhost_poll *poll = n->poll + (nvq - n->vqs); struct socket *sock; - sock = rcu_dereference_protected(vq->private_data, - lockdep_is_held(&vq->mutex)); + sock = vq->private_data; if (!sock) return 0; @@ -764,10 +761,9 @@ static struct socket *vhost_net_stop_vq(struct vhost_net *n, struct socket *sock; mutex_lock(&vq->mutex); - sock = rcu_dereference_protected(vq->private_data, - lockdep_is_held(&vq->mutex)); + sock = vq->private_data; vhost_net_disable_vq(n, vq); - rcu_assign_pointer(vq->private_data, NULL); + vq->private_data = NULL; mutex_unlock(&vq->mutex); return sock; } @@ -923,8 +919,7 @@ static long vhost_net_set_backend(struct vhost_net *n, unsigned index, int fd) } /* start polling new socket */ - oldsock = rcu_dereference_protected(vq->private_data, - lockdep_is_held(&vq->mutex)); + oldsock = vq->private_data; if (sock != oldsock) { ubufs = vhost_net_ubuf_alloc(vq, sock && vhost_sock_zcopy(sock)); @@ -934,7 +929,7 @@ static long vhost_net_set_backend(struct vhost_net *n, unsigned index, int fd) } vhost_net_disable_vq(n, vq); - rcu_assign_pointer(vq->private_data, sock); + vq->private_data = sock; r = vhost_init_used(vq); if (r) goto err_used; @@ -968,7 +963,7 @@ static long vhost_net_set_backend(struct vhost_net *n, unsigned index, int fd) return 0; err_used: - rcu_assign_pointer(vq->private_data, oldsock); + vq->private_data = oldsock; vhost_net_enable_vq(n, vq); if (ubufs) vhost_net_ubuf_put_wait_and_free(ubufs); diff --git a/drivers/vhost/scsi.c b/drivers/vhost/scsi.c index 06adf31a9248..0c27c7df1b09 100644 --- a/drivers/vhost/scsi.c +++ b/drivers/vhost/scsi.c @@ -902,19 +902,15 @@ vhost_scsi_handle_vq(struct vhost_scsi *vs, struct vhost_virtqueue *vq) int head, ret; u8 target; + mutex_lock(&vq->mutex); /* * We can handle the vq only after the endpoint is setup by calling the * VHOST_SCSI_SET_ENDPOINT ioctl. - * - * TODO: Check that we are running from vhost_worker which acts - * as read-side critical section for vhost kind of RCU. - * See the comments in struct vhost_virtqueue in drivers/vhost/vhost.h */ - vs_tpg = rcu_dereference_check(vq->private_data, 1); + vs_tpg = vq->private_data; if (!vs_tpg) - return; + goto out; - mutex_lock(&vq->mutex); vhost_disable_notify(&vs->dev, vq); for (;;) { @@ -1064,6 +1060,7 @@ err_free: vhost_scsi_free_cmd(cmd); err_cmd: vhost_scsi_send_bad_target(vs, vq, head, out); +out: mutex_unlock(&vq->mutex); } @@ -1232,9 +1229,8 @@ vhost_scsi_set_endpoint(struct vhost_scsi *vs, sizeof(vs->vs_vhost_wwpn)); for (i = 0; i < VHOST_SCSI_MAX_VQ; i++) { vq = &vs->vqs[i].vq; - /* Flushing the vhost_work acts as synchronize_rcu */ mutex_lock(&vq->mutex); - rcu_assign_pointer(vq->private_data, vs_tpg); + vq->private_data = vs_tpg; vhost_init_used(vq); mutex_unlock(&vq->mutex); } @@ -1313,9 +1309,8 @@ vhost_scsi_clear_endpoint(struct vhost_scsi *vs, if (match) { for (i = 0; i < VHOST_SCSI_MAX_VQ; i++) { vq = &vs->vqs[i].vq; - /* Flushing the vhost_work acts as synchronize_rcu */ mutex_lock(&vq->mutex); - rcu_assign_pointer(vq->private_data, NULL); + vq->private_data = NULL; mutex_unlock(&vq->mutex); } } diff --git a/drivers/vhost/test.c b/drivers/vhost/test.c index a73ea217f24d..339eae85859a 100644 --- a/drivers/vhost/test.c +++ b/drivers/vhost/test.c @@ -13,7 +13,6 @@ #include <linux/module.h> #include <linux/mutex.h> #include <linux/workqueue.h> -#include <linux/rcupdate.h> #include <linux/file.h> #include <linux/slab.h> @@ -200,9 +199,8 @@ static long vhost_test_run(struct vhost_test *n, int test) priv = test ? n : NULL; /* start polling new socket */ - oldpriv = rcu_dereference_protected(vq->private_data, - lockdep_is_held(&vq->mutex)); - rcu_assign_pointer(vq->private_data, priv); + oldpriv = vq->private_data; + vq->private_data = priv; r = vhost_init_used(&n->vqs[index]); diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h index 42298cd23c73..4465ed5f316d 100644 --- a/drivers/vhost/vhost.h +++ b/drivers/vhost/vhost.h @@ -103,14 +103,8 @@ struct vhost_virtqueue { struct iovec iov[UIO_MAXIOV]; struct iovec *indirect; struct vring_used_elem *heads; - /* We use a kind of RCU to access private pointer. - * All readers access it from worker, which makes it possible to - * flush the vhost_work instead of synchronize_rcu. Therefore readers do - * not need to call rcu_read_lock/rcu_read_unlock: the beginning of - * vhost_work execution acts instead of rcu_read_lock() and the end of - * vhost_work execution acts instead of rcu_read_unlock(). - * Writers use virtqueue mutex. */ - void __rcu *private_data; + /* Protected by virtqueue mutex. */ + void *private_data; /* Log write descriptors */ void __user *log_base; struct vhost_log *log; diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c index 0eda52738ec4..72a5d5b04494 100644 --- a/fs/fuse/dir.c +++ b/fs/fuse/dir.c @@ -1223,30 +1223,46 @@ static int fuse_direntplus_link(struct file *file, if (name.name[1] == '.' && name.len == 2) return 0; } + + if (invalid_nodeid(o->nodeid)) + return -EIO; + if (!fuse_valid_type(o->attr.mode)) + return -EIO; + fc = get_fuse_conn(dir); name.hash = full_name_hash(name.name, name.len); dentry = d_lookup(parent, &name); - if (dentry && dentry->d_inode) { + if (dentry) { inode = dentry->d_inode; - if (get_node_id(inode) == o->nodeid) { + if (!inode) { + d_drop(dentry); + } else if (get_node_id(inode) != o->nodeid || + ((o->attr.mode ^ inode->i_mode) & S_IFMT)) { + err = d_invalidate(dentry); + if (err) + goto out; + } else if (is_bad_inode(inode)) { + err = -EIO; + goto out; + } else { struct fuse_inode *fi; fi = get_fuse_inode(inode); spin_lock(&fc->lock); fi->nlookup++; spin_unlock(&fc->lock); + fuse_change_attributes(inode, &o->attr, + entry_attr_timeout(o), + attr_version); + /* * The other branch to 'found' comes via fuse_iget() * which bumps nlookup inside */ goto found; } - err = d_invalidate(dentry); - if (err) - goto out; dput(dentry); - dentry = NULL; } dentry = d_alloc(parent, &name); @@ -1259,25 +1275,30 @@ static int fuse_direntplus_link(struct file *file, if (!inode) goto out; - alias = d_materialise_unique(dentry, inode); - err = PTR_ERR(alias); - if (IS_ERR(alias)) - goto out; + if (S_ISDIR(inode->i_mode)) { + mutex_lock(&fc->inst_mutex); + alias = fuse_d_add_directory(dentry, inode); + mutex_unlock(&fc->inst_mutex); + err = PTR_ERR(alias); + if (IS_ERR(alias)) { + iput(inode); + goto out; + } + } else { + alias = d_splice_alias(inode, dentry); + } + if (alias) { dput(dentry); dentry = alias; } found: - fuse_change_attributes(inode, &o->attr, entry_attr_timeout(o), - attr_version); - fuse_change_entry_timeout(dentry, o); err = 0; out: - if (dentry) - dput(dentry); + dput(dentry); return err; } diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c index c74d6168db99..3850b018815f 100644 --- a/fs/nfs/nfs4xdr.c +++ b/fs/nfs/nfs4xdr.c @@ -1118,11 +1118,11 @@ static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, len, ((char *)p - (char *)q) + 4); BUG(); } - len = (char *)p - (char *)q - (bmval_len << 2); *q++ = htonl(bmval0); *q++ = htonl(bmval1); if (bmval_len == 3) *q++ = htonl(bmval2); + len = (char *)p - (char *)(q + 1); *q = htonl(len); /* out: */ diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index 8ff6a0019b0b..c827acb0e943 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -830,9 +830,10 @@ nfsd_open(struct svc_rqst *rqstp, struct svc_fh *fhp, umode_t type, flags = O_WRONLY|O_LARGEFILE; } *filp = dentry_open(&path, flags, current_cred()); - if (IS_ERR(*filp)) + if (IS_ERR(*filp)) { host_err = PTR_ERR(*filp); - else { + *filp = NULL; + } else { host_err = ima_file_check(*filp, may_flags); if (may_flags & NFSD_MAY_64BIT_COOKIE) diff --git a/fs/xfs/xfs_dinode.h b/fs/xfs/xfs_dinode.h index 07d735a80a0f..e5869b50dc41 100644 --- a/fs/xfs/xfs_dinode.h +++ b/fs/xfs/xfs_dinode.h @@ -39,6 +39,9 @@ typedef struct xfs_timestamp { * There is a very similar struct icdinode in xfs_inode which matches the * layout of the first 96 bytes of this structure, but is kept in native * format instead of big endian. + * + * Note: di_flushiter is only used by v1/2 inodes - it's effectively a zeroed + * padding field for v3 inodes. */ typedef struct xfs_dinode { __be16 di_magic; /* inode magic # = XFS_DINODE_MAGIC */ diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index b78481f99d9d..bb262c25c8de 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -896,7 +896,6 @@ xfs_dinode_to_disk( to->di_projid_lo = cpu_to_be16(from->di_projid_lo); to->di_projid_hi = cpu_to_be16(from->di_projid_hi); memcpy(to->di_pad, from->di_pad, sizeof(to->di_pad)); - to->di_flushiter = cpu_to_be16(from->di_flushiter); to->di_atime.t_sec = cpu_to_be32(from->di_atime.t_sec); to->di_atime.t_nsec = cpu_to_be32(from->di_atime.t_nsec); to->di_mtime.t_sec = cpu_to_be32(from->di_mtime.t_sec); @@ -924,6 +923,9 @@ xfs_dinode_to_disk( to->di_lsn = cpu_to_be64(from->di_lsn); memcpy(to->di_pad2, from->di_pad2, sizeof(to->di_pad2)); uuid_copy(&to->di_uuid, &from->di_uuid); + to->di_flushiter = 0; + } else { + to->di_flushiter = cpu_to_be16(from->di_flushiter); } } @@ -1029,10 +1031,14 @@ xfs_dinode_calc_crc( /* * Read the disk inode attributes into the in-core inode structure. * - * If we are initialising a new inode and we are not utilising the - * XFS_MOUNT_IKEEP inode cluster mode, we can simple build the new inode core - * with a random generation number. If we are keeping inodes around, we need to - * read the inode cluster to get the existing generation number off disk. + * For version 5 superblocks, if we are initialising a new inode and we are not + * utilising the XFS_MOUNT_IKEEP inode cluster mode, we can simple build the new + * inode core with a random generation number. If we are keeping inodes around, + * we need to read the inode cluster to get the existing generation number off + * disk. Further, if we are using version 4 superblocks (i.e. v1/v2 inode + * format) then log recovery is dependent on the di_flushiter field being + * initialised from the current on-disk value and hence we must also read the + * inode off disk. */ int xfs_iread( @@ -1054,6 +1060,7 @@ xfs_iread( /* shortcut IO on inode allocation if possible */ if ((iget_flags & XFS_IGET_CREATE) && + xfs_sb_version_hascrc(&mp->m_sb) && !(mp->m_flags & XFS_MOUNT_IKEEP)) { /* initialise the on-disk inode core */ memset(&ip->i_d, 0, sizeof(ip->i_d)); @@ -2882,12 +2889,18 @@ xfs_iflush_int( __func__, ip->i_ino, ip->i_d.di_forkoff, ip); goto corrupt_out; } + /* - * bump the flush iteration count, used to detect flushes which - * postdate a log record during recovery. This is redundant as we now - * log every change and hence this can't happen. Still, it doesn't hurt. + * Inode item log recovery for v1/v2 inodes are dependent on the + * di_flushiter count for correct sequencing. We bump the flush + * iteration count so we can detect flushes which postdate a log record + * during recovery. This is redundant as we now log every change and + * hence this can't happen but we need to still do it to ensure + * backwards compatibility with old kernels that predate logging all + * inode changes. */ - ip->i_d.di_flushiter++; + if (ip->i_d.di_version < 3) + ip->i_d.di_flushiter++; /* * Copy the dirty parts of the inode into the on-disk diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c index 6fcc910a50b9..7681b19aa5dc 100644 --- a/fs/xfs/xfs_log_recover.c +++ b/fs/xfs/xfs_log_recover.c @@ -2592,8 +2592,16 @@ xlog_recover_inode_pass2( goto error; } - /* Skip replay when the on disk inode is newer than the log one */ - if (dicp->di_flushiter < be16_to_cpu(dip->di_flushiter)) { + /* + * di_flushiter is only valid for v1/2 inodes. All changes for v3 inodes + * are transactional and if ordering is necessary we can determine that + * more accurately by the LSN field in the V3 inode core. Don't trust + * the inode versions we might be changing them here - use the + * superblock flag to determine whether we need to look at di_flushiter + * to skip replay when the on disk inode is newer than the log one + */ + if (!xfs_sb_version_hascrc(&mp->m_sb) && + dicp->di_flushiter < be16_to_cpu(dip->di_flushiter)) { /* * Deal with the wrap case, DI_MAX_FLUSH is less * than smaller numbers @@ -2608,6 +2616,7 @@ xlog_recover_inode_pass2( goto error; } } + /* Take the opportunity to reset the flush iteration count */ dicp->di_flushiter = 0; diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h index 297462b9f41a..e9ac882868c0 100644 --- a/include/linux/cgroup.h +++ b/include/linux/cgroup.h @@ -542,8 +542,7 @@ int cgroup_rm_cftypes(struct cgroup_subsys *ss, struct cftype *cfts); bool cgroup_is_descendant(struct cgroup *cgrp, struct cgroup *ancestor); int cgroup_path(const struct cgroup *cgrp, char *buf, int buflen); -int task_cgroup_path_from_hierarchy(struct task_struct *task, int hierarchy_id, - char *buf, size_t buflen); +int task_cgroup_path(struct task_struct *task, char *buf, size_t buflen); int cgroup_task_count(const struct cgroup *cgrp); diff --git a/include/linux/cgroup_subsys.h b/include/linux/cgroup_subsys.h index 6e7ec64b69ab..b613ffd402d1 100644 --- a/include/linux/cgroup_subsys.h +++ b/include/linux/cgroup_subsys.h @@ -1,86 +1,55 @@ -/* Add subsystem definitions of the form SUBSYS(<name>) in this - * file. Surround each one by a line of comment markers so that - * patches don't collide +/* + * List of cgroup subsystems. + * + * DO NOT ADD ANY SUBSYSTEM WITHOUT EXPLICIT ACKS FROM CGROUP MAINTAINERS. */ - -/* */ - -/* */ - #if IS_SUBSYS_ENABLED(CONFIG_CPUSETS) SUBSYS(cpuset) #endif -/* */ - #if IS_SUBSYS_ENABLED(CONFIG_CGROUP_DEBUG) SUBSYS(debug) #endif -/* */ - #if IS_SUBSYS_ENABLED(CONFIG_CGROUP_SCHED) SUBSYS(cpu_cgroup) #endif -/* */ - #if IS_SUBSYS_ENABLED(CONFIG_CGROUP_CPUACCT) SUBSYS(cpuacct) #endif -/* */ - #if IS_SUBSYS_ENABLED(CONFIG_MEMCG) SUBSYS(mem_cgroup) #endif -/* */ - #if IS_SUBSYS_ENABLED(CONFIG_CGROUP_DEVICE) SUBSYS(devices) #endif -/* */ - #if IS_SUBSYS_ENABLED(CONFIG_CGROUP_FREEZER) SUBSYS(freezer) #endif -/* */ - #if IS_SUBSYS_ENABLED(CONFIG_NET_CLS_CGROUP) SUBSYS(net_cls) #endif -/* */ - #if IS_SUBSYS_ENABLED(CONFIG_BLK_CGROUP) SUBSYS(blkio) #endif -/* */ - #if IS_SUBSYS_ENABLED(CONFIG_CGROUP_PERF) SUBSYS(perf) #endif -/* */ - #if IS_SUBSYS_ENABLED(CONFIG_NETPRIO_CGROUP) SUBSYS(net_prio) #endif -/* */ - #if IS_SUBSYS_ENABLED(CONFIG_CGROUP_HUGETLB) SUBSYS(hugetlb) #endif - -/* */ - -#ifdef CONFIG_CGROUP_BCACHE -SUBSYS(bcache) -#endif - -/* */ +/* + * DO NOT ADD ANY SUBSYSTEM WITHOUT EXPLICIT ACKS FROM CGROUP MAINTAINERS. + */ diff --git a/include/linux/crc-t10dif.h b/include/linux/crc-t10dif.h index b3cb71f0d3b0..a9c96d865ee7 100644 --- a/include/linux/crc-t10dif.h +++ b/include/linux/crc-t10dif.h @@ -3,10 +3,6 @@ #include <linux/types.h> -#define CRC_T10DIF_DIGEST_SIZE 2 -#define CRC_T10DIF_BLOCK_SIZE 1 - -__u16 crc_t10dif_generic(__u16 crc, const unsigned char *buffer, size_t len); __u16 crc_t10dif(unsigned char const *, size_t); #endif diff --git a/include/linux/drbd.h b/include/linux/drbd.h index 1b4d4ee1168f..de7d74ab3de6 100644 --- a/include/linux/drbd.h +++ b/include/linux/drbd.h @@ -177,7 +177,11 @@ enum drbd_ret_code { ERR_NEED_APV_100 = 163, ERR_NEED_ALLOW_TWO_PRI = 164, ERR_MD_UNCLEAN = 165, - + ERR_MD_LAYOUT_CONNECTED = 166, + ERR_MD_LAYOUT_TOO_BIG = 167, + ERR_MD_LAYOUT_TOO_SMALL = 168, + ERR_MD_LAYOUT_NO_FIT = 169, + ERR_IMPLICIT_SHRINK = 170, /* insert new ones above this line */ AFTER_LAST_ERR_CODE }; diff --git a/include/linux/drbd_genl.h b/include/linux/drbd_genl.h index d0d8fac8a6e4..e8c44572b8cb 100644 --- a/include/linux/drbd_genl.h +++ b/include/linux/drbd_genl.h @@ -181,6 +181,8 @@ GENL_struct(DRBD_NLA_RESIZE_PARMS, 7, resize_parms, __u64_field(1, DRBD_GENLA_F_MANDATORY, resize_size) __flg_field(2, DRBD_GENLA_F_MANDATORY, resize_force) __flg_field(3, DRBD_GENLA_F_MANDATORY, no_resync) + __u32_field_def(4, 0 /* OPTIONAL */, al_stripes, DRBD_AL_STRIPES_DEF) + __u32_field_def(5, 0 /* OPTIONAL */, al_stripe_size, DRBD_AL_STRIPE_SIZE_DEF) ) GENL_struct(DRBD_NLA_STATE_INFO, 8, state_info, diff --git a/include/linux/drbd_limits.h b/include/linux/drbd_limits.h index 1fedf2b17cc8..17e50bb00521 100644 --- a/include/linux/drbd_limits.h +++ b/include/linux/drbd_limits.h @@ -215,4 +215,13 @@ #define DRBD_ALWAYS_ASBP_DEF 0 #define DRBD_USE_RLE_DEF 1 +#define DRBD_AL_STRIPES_MIN 1 +#define DRBD_AL_STRIPES_MAX 1024 +#define DRBD_AL_STRIPES_DEF 1 +#define DRBD_AL_STRIPES_SCALE '1' + +#define DRBD_AL_STRIPE_SIZE_MIN 4 +#define DRBD_AL_STRIPE_SIZE_MAX 16777216 +#define DRBD_AL_STRIPE_SIZE_DEF 32 +#define DRBD_AL_STRIPE_SIZE_SCALE 'k' /* kilobytes */ #endif diff --git a/include/linux/edac.h b/include/linux/edac.h index 0b763276f619..5c6d7fbaf89e 100644 --- a/include/linux/edac.h +++ b/include/linux/edac.h @@ -622,7 +622,7 @@ struct edac_raw_error_desc { */ struct mem_ctl_info { struct device dev; - struct bus_type bus; + struct bus_type *bus; struct list_head link; /* for global list of mem_ctl_info structs */ @@ -742,4 +742,9 @@ struct mem_ctl_info { #endif }; +/* + * Maximum number of memory controllers in the coherent fabric. + */ +#define EDAC_MAX_MCS 16 + #endif diff --git a/include/linux/mfd/syscon/imx6q-iomuxc-gpr.h b/include/linux/mfd/syscon/imx6q-iomuxc-gpr.h index dab34a1deb2c..e235251f1ba9 100644 --- a/include/linux/mfd/syscon/imx6q-iomuxc-gpr.h +++ b/include/linux/mfd/syscon/imx6q-iomuxc-gpr.h @@ -279,41 +279,88 @@ #define IMX6Q_GPR13_CAN2_STOP_REQ BIT(29) #define IMX6Q_GPR13_CAN1_STOP_REQ BIT(28) #define IMX6Q_GPR13_ENET_STOP_REQ BIT(27) -#define IMX6Q_GPR13_SATA_PHY_8_MASK (0x7 << 24) -#define IMX6Q_GPR13_SATA_PHY_8_0_5_DB (0x0 << 24) -#define IMX6Q_GPR13_SATA_PHY_8_1_0_DB (0x1 << 24) -#define IMX6Q_GPR13_SATA_PHY_8_1_5_DB (0x2 << 24) -#define IMX6Q_GPR13_SATA_PHY_8_2_0_DB (0x3 << 24) -#define IMX6Q_GPR13_SATA_PHY_8_2_5_DB (0x4 << 24) -#define IMX6Q_GPR13_SATA_PHY_8_3_0_DB (0x5 << 24) -#define IMX6Q_GPR13_SATA_PHY_8_3_5_DB (0x6 << 24) -#define IMX6Q_GPR13_SATA_PHY_8_4_0_DB (0x7 << 24) -#define IMX6Q_GPR13_SATA_PHY_7_MASK (0x1f << 19) -#define IMX6Q_GPR13_SATA_PHY_7_SATA1I (0x10 << 19) -#define IMX6Q_GPR13_SATA_PHY_7_SATA1M (0x10 << 19) -#define IMX6Q_GPR13_SATA_PHY_7_SATA1X (0x1a << 19) -#define IMX6Q_GPR13_SATA_PHY_7_SATA2I (0x12 << 19) -#define IMX6Q_GPR13_SATA_PHY_7_SATA2M (0x12 << 19) -#define IMX6Q_GPR13_SATA_PHY_7_SATA2X (0x1a << 19) -#define IMX6Q_GPR13_SATA_PHY_6_MASK (0x7 << 16) -#define IMX6Q_GPR13_SATA_SPEED_MASK BIT(15) -#define IMX6Q_GPR13_SATA_SPEED_1P5G 0x0 -#define IMX6Q_GPR13_SATA_SPEED_3P0G BIT(15) -#define IMX6Q_GPR13_SATA_PHY_5 BIT(14) -#define IMX6Q_GPR13_SATA_PHY_4_MASK (0x7 << 11) -#define IMX6Q_GPR13_SATA_PHY_4_16_16 (0x0 << 11) -#define IMX6Q_GPR13_SATA_PHY_4_14_16 (0x1 << 11) -#define IMX6Q_GPR13_SATA_PHY_4_12_16 (0x2 << 11) -#define IMX6Q_GPR13_SATA_PHY_4_10_16 (0x3 << 11) -#define IMX6Q_GPR13_SATA_PHY_4_9_16 (0x4 << 11) -#define IMX6Q_GPR13_SATA_PHY_4_8_16 (0x5 << 11) -#define IMX6Q_GPR13_SATA_PHY_3_MASK (0xf << 7) -#define IMX6Q_GPR13_SATA_PHY_3_OFF 0x7 -#define IMX6Q_GPR13_SATA_PHY_2_MASK (0x1f << 2) -#define IMX6Q_GPR13_SATA_PHY_2_OFF 0x2 -#define IMX6Q_GPR13_SATA_PHY_1_MASK (0x3 << 0) -#define IMX6Q_GPR13_SATA_PHY_1_FAST (0x0 << 0) -#define IMX6Q_GPR13_SATA_PHY_1_MED (0x1 << 0) -#define IMX6Q_GPR13_SATA_PHY_1_SLOW (0x2 << 0) - +#define IMX6Q_GPR13_SATA_RX_EQ_VAL_MASK (0x7 << 24) +#define IMX6Q_GPR13_SATA_RX_EQ_VAL_0_5_DB (0x0 << 24) +#define IMX6Q_GPR13_SATA_RX_EQ_VAL_1_0_DB (0x1 << 24) +#define IMX6Q_GPR13_SATA_RX_EQ_VAL_1_5_DB (0x2 << 24) +#define IMX6Q_GPR13_SATA_RX_EQ_VAL_2_0_DB (0x3 << 24) +#define IMX6Q_GPR13_SATA_RX_EQ_VAL_2_5_DB (0x4 << 24) +#define IMX6Q_GPR13_SATA_RX_EQ_VAL_3_0_DB (0x5 << 24) +#define IMX6Q_GPR13_SATA_RX_EQ_VAL_3_5_DB (0x6 << 24) +#define IMX6Q_GPR13_SATA_RX_EQ_VAL_4_0_DB (0x7 << 24) +#define IMX6Q_GPR13_SATA_RX_LOS_LVL_MASK (0x1f << 19) +#define IMX6Q_GPR13_SATA_RX_LOS_LVL_SATA1I (0x10 << 19) +#define IMX6Q_GPR13_SATA_RX_LOS_LVL_SATA1M (0x10 << 19) +#define IMX6Q_GPR13_SATA_RX_LOS_LVL_SATA1X (0x1a << 19) +#define IMX6Q_GPR13_SATA_RX_LOS_LVL_SATA2I (0x12 << 19) +#define IMX6Q_GPR13_SATA_RX_LOS_LVL_SATA2M (0x12 << 19) +#define IMX6Q_GPR13_SATA_RX_LOS_LVL_SATA2X (0x1a << 19) +#define IMX6Q_GPR13_SATA_RX_DPLL_MODE_MASK (0x7 << 16) +#define IMX6Q_GPR13_SATA_RX_DPLL_MODE_1P_1F (0x0 << 16) +#define IMX6Q_GPR13_SATA_RX_DPLL_MODE_2P_2F (0x1 << 16) +#define IMX6Q_GPR13_SATA_RX_DPLL_MODE_1P_4F (0x2 << 16) +#define IMX6Q_GPR13_SATA_RX_DPLL_MODE_2P_4F (0x3 << 16) +#define IMX6Q_GPR13_SATA_SPD_MODE_MASK BIT(15) +#define IMX6Q_GPR13_SATA_SPD_MODE_1P5G 0x0 +#define IMX6Q_GPR13_SATA_SPD_MODE_3P0G BIT(15) +#define IMX6Q_GPR13_SATA_MPLL_SS_EN BIT(14) +#define IMX6Q_GPR13_SATA_TX_ATTEN_MASK (0x7 << 11) +#define IMX6Q_GPR13_SATA_TX_ATTEN_16_16 (0x0 << 11) +#define IMX6Q_GPR13_SATA_TX_ATTEN_14_16 (0x1 << 11) +#define IMX6Q_GPR13_SATA_TX_ATTEN_12_16 (0x2 << 11) +#define IMX6Q_GPR13_SATA_TX_ATTEN_10_16 (0x3 << 11) +#define IMX6Q_GPR13_SATA_TX_ATTEN_9_16 (0x4 << 11) +#define IMX6Q_GPR13_SATA_TX_ATTEN_8_16 (0x5 << 11) +#define IMX6Q_GPR13_SATA_TX_BOOST_MASK (0xf << 7) +#define IMX6Q_GPR13_SATA_TX_BOOST_0_00_DB (0x0 << 7) +#define IMX6Q_GPR13_SATA_TX_BOOST_0_37_DB (0x1 << 7) +#define IMX6Q_GPR13_SATA_TX_BOOST_0_74_DB (0x2 << 7) +#define IMX6Q_GPR13_SATA_TX_BOOST_1_11_DB (0x3 << 7) +#define IMX6Q_GPR13_SATA_TX_BOOST_1_48_DB (0x4 << 7) +#define IMX6Q_GPR13_SATA_TX_BOOST_1_85_DB (0x5 << 7) +#define IMX6Q_GPR13_SATA_TX_BOOST_2_22_DB (0x6 << 7) +#define IMX6Q_GPR13_SATA_TX_BOOST_2_59_DB (0x7 << 7) +#define IMX6Q_GPR13_SATA_TX_BOOST_2_96_DB (0x8 << 7) +#define IMX6Q_GPR13_SATA_TX_BOOST_3_33_DB (0x9 << 7) +#define IMX6Q_GPR13_SATA_TX_BOOST_3_70_DB (0xa << 7) +#define IMX6Q_GPR13_SATA_TX_BOOST_4_07_DB (0xb << 7) +#define IMX6Q_GPR13_SATA_TX_BOOST_4_44_DB (0xc << 7) +#define IMX6Q_GPR13_SATA_TX_BOOST_4_81_DB (0xd << 7) +#define IMX6Q_GPR13_SATA_TX_BOOST_5_28_DB (0xe << 7) +#define IMX6Q_GPR13_SATA_TX_BOOST_5_75_DB (0xf << 7) +#define IMX6Q_GPR13_SATA_TX_LVL_MASK (0x1f << 2) +#define IMX6Q_GPR13_SATA_TX_LVL_0_937_V (0x00 << 2) +#define IMX6Q_GPR13_SATA_TX_LVL_0_947_V (0x01 << 2) +#define IMX6Q_GPR13_SATA_TX_LVL_0_957_V (0x02 << 2) +#define IMX6Q_GPR13_SATA_TX_LVL_0_966_V (0x03 << 2) +#define IMX6Q_GPR13_SATA_TX_LVL_0_976_V (0x04 << 2) +#define IMX6Q_GPR13_SATA_TX_LVL_0_986_V (0x05 << 2) +#define IMX6Q_GPR13_SATA_TX_LVL_0_996_V (0x06 << 2) +#define IMX6Q_GPR13_SATA_TX_LVL_1_005_V (0x07 << 2) +#define IMX6Q_GPR13_SATA_TX_LVL_1_015_V (0x08 << 2) +#define IMX6Q_GPR13_SATA_TX_LVL_1_025_V (0x09 << 2) +#define IMX6Q_GPR13_SATA_TX_LVL_1_035_V (0x0a << 2) +#define IMX6Q_GPR13_SATA_TX_LVL_1_045_V (0x0b << 2) +#define IMX6Q_GPR13_SATA_TX_LVL_1_054_V (0x0c << 2) +#define IMX6Q_GPR13_SATA_TX_LVL_1_064_V (0x0d << 2) +#define IMX6Q_GPR13_SATA_TX_LVL_1_074_V (0x0e << 2) +#define IMX6Q_GPR13_SATA_TX_LVL_1_084_V (0x0f << 2) +#define IMX6Q_GPR13_SATA_TX_LVL_1_094_V (0x10 << 2) +#define IMX6Q_GPR13_SATA_TX_LVL_1_104_V (0x11 << 2) +#define IMX6Q_GPR13_SATA_TX_LVL_1_113_V (0x12 << 2) +#define IMX6Q_GPR13_SATA_TX_LVL_1_123_V (0x13 << 2) +#define IMX6Q_GPR13_SATA_TX_LVL_1_133_V (0x14 << 2) +#define IMX6Q_GPR13_SATA_TX_LVL_1_143_V (0x15 << 2) +#define IMX6Q_GPR13_SATA_TX_LVL_1_152_V (0x16 << 2) +#define IMX6Q_GPR13_SATA_TX_LVL_1_162_V (0x17 << 2) +#define IMX6Q_GPR13_SATA_TX_LVL_1_172_V (0x18 << 2) +#define IMX6Q_GPR13_SATA_TX_LVL_1_182_V (0x19 << 2) +#define IMX6Q_GPR13_SATA_TX_LVL_1_191_V (0x1a << 2) +#define IMX6Q_GPR13_SATA_TX_LVL_1_201_V (0x1b << 2) +#define IMX6Q_GPR13_SATA_TX_LVL_1_211_V (0x1c << 2) +#define IMX6Q_GPR13_SATA_TX_LVL_1_221_V (0x1d << 2) +#define IMX6Q_GPR13_SATA_TX_LVL_1_230_V (0x1e << 2) +#define IMX6Q_GPR13_SATA_TX_LVL_1_240_V (0x1f << 2) +#define IMX6Q_GPR13_SATA_MPLL_CLK_EN BIT(1) +#define IMX6Q_GPR13_SATA_TX_EDGE_RATE BIT(0) #endif /* __LINUX_IMX6Q_IOMUXC_GPR_H */ diff --git a/include/trace/events/bcache.h b/include/trace/events/bcache.h index 3cc5a0b278c3..5ebda976ea93 100644 --- a/include/trace/events/bcache.h +++ b/include/trace/events/bcache.h @@ -9,9 +9,7 @@ struct search; DECLARE_EVENT_CLASS(bcache_request, - TP_PROTO(struct search *s, struct bio *bio), - TP_ARGS(s, bio), TP_STRUCT__entry( @@ -22,7 +20,6 @@ DECLARE_EVENT_CLASS(bcache_request, __field(dev_t, orig_sector ) __field(unsigned int, nr_sector ) __array(char, rwbs, 6 ) - __array(char, comm, TASK_COMM_LEN ) ), TP_fast_assign( @@ -33,36 +30,66 @@ DECLARE_EVENT_CLASS(bcache_request, __entry->orig_sector = bio->bi_sector - 16; __entry->nr_sector = bio->bi_size >> 9; blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size); - memcpy(__entry->comm, current->comm, TASK_COMM_LEN); ), - TP_printk("%d,%d %s %llu + %u [%s] (from %d,%d @ %llu)", + TP_printk("%d,%d %s %llu + %u (from %d,%d @ %llu)", MAJOR(__entry->dev), MINOR(__entry->dev), - __entry->rwbs, - (unsigned long long)__entry->sector, - __entry->nr_sector, __entry->comm, - __entry->orig_major, __entry->orig_minor, + __entry->rwbs, (unsigned long long)__entry->sector, + __entry->nr_sector, __entry->orig_major, __entry->orig_minor, (unsigned long long)__entry->orig_sector) ); -DEFINE_EVENT(bcache_request, bcache_request_start, +DECLARE_EVENT_CLASS(bkey, + TP_PROTO(struct bkey *k), + TP_ARGS(k), - TP_PROTO(struct search *s, struct bio *bio), + TP_STRUCT__entry( + __field(u32, size ) + __field(u32, inode ) + __field(u64, offset ) + __field(bool, dirty ) + ), - TP_ARGS(s, bio) + TP_fast_assign( + __entry->inode = KEY_INODE(k); + __entry->offset = KEY_OFFSET(k); + __entry->size = KEY_SIZE(k); + __entry->dirty = KEY_DIRTY(k); + ), + + TP_printk("%u:%llu len %u dirty %u", __entry->inode, + __entry->offset, __entry->size, __entry->dirty) ); -DEFINE_EVENT(bcache_request, bcache_request_end, +DECLARE_EVENT_CLASS(btree_node, + TP_PROTO(struct btree *b), + TP_ARGS(b), + + TP_STRUCT__entry( + __field(size_t, bucket ) + ), + TP_fast_assign( + __entry->bucket = PTR_BUCKET_NR(b->c, &b->key, 0); + ), + + TP_printk("bucket %zu", __entry->bucket) +); + +/* request.c */ + +DEFINE_EVENT(bcache_request, bcache_request_start, TP_PROTO(struct search *s, struct bio *bio), + TP_ARGS(s, bio) +); +DEFINE_EVENT(bcache_request, bcache_request_end, + TP_PROTO(struct search *s, struct bio *bio), TP_ARGS(s, bio) ); DECLARE_EVENT_CLASS(bcache_bio, - TP_PROTO(struct bio *bio), - TP_ARGS(bio), TP_STRUCT__entry( @@ -70,7 +97,6 @@ DECLARE_EVENT_CLASS(bcache_bio, __field(sector_t, sector ) __field(unsigned int, nr_sector ) __array(char, rwbs, 6 ) - __array(char, comm, TASK_COMM_LEN ) ), TP_fast_assign( @@ -78,191 +104,328 @@ DECLARE_EVENT_CLASS(bcache_bio, __entry->sector = bio->bi_sector; __entry->nr_sector = bio->bi_size >> 9; blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size); - memcpy(__entry->comm, current->comm, TASK_COMM_LEN); ), - TP_printk("%d,%d %s %llu + %u [%s]", - MAJOR(__entry->dev), MINOR(__entry->dev), - __entry->rwbs, - (unsigned long long)__entry->sector, - __entry->nr_sector, __entry->comm) + TP_printk("%d,%d %s %llu + %u", + MAJOR(__entry->dev), MINOR(__entry->dev), __entry->rwbs, + (unsigned long long)__entry->sector, __entry->nr_sector) ); - -DEFINE_EVENT(bcache_bio, bcache_passthrough, - +DEFINE_EVENT(bcache_bio, bcache_bypass_sequential, TP_PROTO(struct bio *bio), + TP_ARGS(bio) +); +DEFINE_EVENT(bcache_bio, bcache_bypass_congested, + TP_PROTO(struct bio *bio), TP_ARGS(bio) ); -DEFINE_EVENT(bcache_bio, bcache_cache_hit, +TRACE_EVENT(bcache_read, + TP_PROTO(struct bio *bio, bool hit, bool bypass), + TP_ARGS(bio, hit, bypass), - TP_PROTO(struct bio *bio), + TP_STRUCT__entry( + __field(dev_t, dev ) + __field(sector_t, sector ) + __field(unsigned int, nr_sector ) + __array(char, rwbs, 6 ) + __field(bool, cache_hit ) + __field(bool, bypass ) + ), - TP_ARGS(bio) + TP_fast_assign( + __entry->dev = bio->bi_bdev->bd_dev; + __entry->sector = bio->bi_sector; + __entry->nr_sector = bio->bi_size >> 9; + blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size); + __entry->cache_hit = hit; + __entry->bypass = bypass; + ), + + TP_printk("%d,%d %s %llu + %u hit %u bypass %u", + MAJOR(__entry->dev), MINOR(__entry->dev), + __entry->rwbs, (unsigned long long)__entry->sector, + __entry->nr_sector, __entry->cache_hit, __entry->bypass) ); -DEFINE_EVENT(bcache_bio, bcache_cache_miss, +TRACE_EVENT(bcache_write, + TP_PROTO(struct bio *bio, bool writeback, bool bypass), + TP_ARGS(bio, writeback, bypass), - TP_PROTO(struct bio *bio), + TP_STRUCT__entry( + __field(dev_t, dev ) + __field(sector_t, sector ) + __field(unsigned int, nr_sector ) + __array(char, rwbs, 6 ) + __field(bool, writeback ) + __field(bool, bypass ) + ), - TP_ARGS(bio) + TP_fast_assign( + __entry->dev = bio->bi_bdev->bd_dev; + __entry->sector = bio->bi_sector; + __entry->nr_sector = bio->bi_size >> 9; + blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size); + __entry->writeback = writeback; + __entry->bypass = bypass; + ), + + TP_printk("%d,%d %s %llu + %u hit %u bypass %u", + MAJOR(__entry->dev), MINOR(__entry->dev), + __entry->rwbs, (unsigned long long)__entry->sector, + __entry->nr_sector, __entry->writeback, __entry->bypass) ); DEFINE_EVENT(bcache_bio, bcache_read_retry, - TP_PROTO(struct bio *bio), - TP_ARGS(bio) ); -DEFINE_EVENT(bcache_bio, bcache_writethrough, +DEFINE_EVENT(bkey, bcache_cache_insert, + TP_PROTO(struct bkey *k), + TP_ARGS(k) +); - TP_PROTO(struct bio *bio), +/* Journal */ - TP_ARGS(bio) -); +DECLARE_EVENT_CLASS(cache_set, + TP_PROTO(struct cache_set *c), + TP_ARGS(c), -DEFINE_EVENT(bcache_bio, bcache_writeback, + TP_STRUCT__entry( + __array(char, uuid, 16 ) + ), - TP_PROTO(struct bio *bio), + TP_fast_assign( + memcpy(__entry->uuid, c->sb.set_uuid, 16); + ), - TP_ARGS(bio) + TP_printk("%pU", __entry->uuid) ); -DEFINE_EVENT(bcache_bio, bcache_write_skip, - - TP_PROTO(struct bio *bio), +DEFINE_EVENT(bkey, bcache_journal_replay_key, + TP_PROTO(struct bkey *k), + TP_ARGS(k) +); - TP_ARGS(bio) +DEFINE_EVENT(cache_set, bcache_journal_full, + TP_PROTO(struct cache_set *c), + TP_ARGS(c) ); -DEFINE_EVENT(bcache_bio, bcache_btree_read, +DEFINE_EVENT(cache_set, bcache_journal_entry_full, + TP_PROTO(struct cache_set *c), + TP_ARGS(c) +); +DEFINE_EVENT(bcache_bio, bcache_journal_write, TP_PROTO(struct bio *bio), - TP_ARGS(bio) ); -DEFINE_EVENT(bcache_bio, bcache_btree_write, +/* Btree */ - TP_PROTO(struct bio *bio), +DEFINE_EVENT(cache_set, bcache_btree_cache_cannibalize, + TP_PROTO(struct cache_set *c), + TP_ARGS(c) +); - TP_ARGS(bio) +DEFINE_EVENT(btree_node, bcache_btree_read, + TP_PROTO(struct btree *b), + TP_ARGS(b) ); -DEFINE_EVENT(bcache_bio, bcache_write_dirty, +TRACE_EVENT(bcache_btree_write, + TP_PROTO(struct btree *b), + TP_ARGS(b), - TP_PROTO(struct bio *bio), + TP_STRUCT__entry( + __field(size_t, bucket ) + __field(unsigned, block ) + __field(unsigned, keys ) + ), - TP_ARGS(bio) + TP_fast_assign( + __entry->bucket = PTR_BUCKET_NR(b->c, &b->key, 0); + __entry->block = b->written; + __entry->keys = b->sets[b->nsets].data->keys; + ), + + TP_printk("bucket %zu", __entry->bucket) ); -DEFINE_EVENT(bcache_bio, bcache_read_dirty, +DEFINE_EVENT(btree_node, bcache_btree_node_alloc, + TP_PROTO(struct btree *b), + TP_ARGS(b) +); - TP_PROTO(struct bio *bio), +DEFINE_EVENT(btree_node, bcache_btree_node_alloc_fail, + TP_PROTO(struct btree *b), + TP_ARGS(b) +); - TP_ARGS(bio) +DEFINE_EVENT(btree_node, bcache_btree_node_free, + TP_PROTO(struct btree *b), + TP_ARGS(b) ); -DEFINE_EVENT(bcache_bio, bcache_write_moving, +TRACE_EVENT(bcache_btree_gc_coalesce, + TP_PROTO(unsigned nodes), + TP_ARGS(nodes), - TP_PROTO(struct bio *bio), + TP_STRUCT__entry( + __field(unsigned, nodes ) + ), - TP_ARGS(bio) + TP_fast_assign( + __entry->nodes = nodes; + ), + + TP_printk("coalesced %u nodes", __entry->nodes) ); -DEFINE_EVENT(bcache_bio, bcache_read_moving, +DEFINE_EVENT(cache_set, bcache_gc_start, + TP_PROTO(struct cache_set *c), + TP_ARGS(c) +); - TP_PROTO(struct bio *bio), +DEFINE_EVENT(cache_set, bcache_gc_end, + TP_PROTO(struct cache_set *c), + TP_ARGS(c) +); - TP_ARGS(bio) +DEFINE_EVENT(bkey, bcache_gc_copy, + TP_PROTO(struct bkey *k), + TP_ARGS(k) ); -DEFINE_EVENT(bcache_bio, bcache_journal_write, +DEFINE_EVENT(bkey, bcache_gc_copy_collision, + TP_PROTO(struct bkey *k), + TP_ARGS(k) +); - TP_PROTO(struct bio *bio), +TRACE_EVENT(bcache_btree_insert_key, + TP_PROTO(struct btree *b, struct bkey *k, unsigned op, unsigned status), + TP_ARGS(b, k, op, status), - TP_ARGS(bio) -); + TP_STRUCT__entry( + __field(u64, btree_node ) + __field(u32, btree_level ) + __field(u32, inode ) + __field(u64, offset ) + __field(u32, size ) + __field(u8, dirty ) + __field(u8, op ) + __field(u8, status ) + ), -DECLARE_EVENT_CLASS(bcache_cache_bio, + TP_fast_assign( + __entry->btree_node = PTR_BUCKET_NR(b->c, &b->key, 0); + __entry->btree_level = b->level; + __entry->inode = KEY_INODE(k); + __entry->offset = KEY_OFFSET(k); + __entry->size = KEY_SIZE(k); + __entry->dirty = KEY_DIRTY(k); + __entry->op = op; + __entry->status = status; + ), - TP_PROTO(struct bio *bio, - sector_t orig_sector, - struct block_device* orig_bdev), + TP_printk("%u for %u at %llu(%u): %u:%llu len %u dirty %u", + __entry->status, __entry->op, + __entry->btree_node, __entry->btree_level, + __entry->inode, __entry->offset, + __entry->size, __entry->dirty) +); - TP_ARGS(bio, orig_sector, orig_bdev), +DECLARE_EVENT_CLASS(btree_split, + TP_PROTO(struct btree *b, unsigned keys), + TP_ARGS(b, keys), TP_STRUCT__entry( - __field(dev_t, dev ) - __field(dev_t, orig_dev ) - __field(sector_t, sector ) - __field(sector_t, orig_sector ) - __field(unsigned int, nr_sector ) - __array(char, rwbs, 6 ) - __array(char, comm, TASK_COMM_LEN ) + __field(size_t, bucket ) + __field(unsigned, keys ) ), TP_fast_assign( - __entry->dev = bio->bi_bdev->bd_dev; - __entry->orig_dev = orig_bdev->bd_dev; - __entry->sector = bio->bi_sector; - __entry->orig_sector = orig_sector; - __entry->nr_sector = bio->bi_size >> 9; - blk_fill_rwbs(__entry->rwbs, bio->bi_rw, bio->bi_size); - memcpy(__entry->comm, current->comm, TASK_COMM_LEN); + __entry->bucket = PTR_BUCKET_NR(b->c, &b->key, 0); + __entry->keys = keys; ), - TP_printk("%d,%d %s %llu + %u [%s] (from %d,%d %llu)", - MAJOR(__entry->dev), MINOR(__entry->dev), - __entry->rwbs, - (unsigned long long)__entry->sector, - __entry->nr_sector, __entry->comm, - MAJOR(__entry->orig_dev), MINOR(__entry->orig_dev), - (unsigned long long)__entry->orig_sector) + TP_printk("bucket %zu keys %u", __entry->bucket, __entry->keys) ); -DEFINE_EVENT(bcache_cache_bio, bcache_cache_insert, - - TP_PROTO(struct bio *bio, - sector_t orig_sector, - struct block_device *orig_bdev), +DEFINE_EVENT(btree_split, bcache_btree_node_split, + TP_PROTO(struct btree *b, unsigned keys), + TP_ARGS(b, keys) +); - TP_ARGS(bio, orig_sector, orig_bdev) +DEFINE_EVENT(btree_split, bcache_btree_node_compact, + TP_PROTO(struct btree *b, unsigned keys), + TP_ARGS(b, keys) ); -DECLARE_EVENT_CLASS(bcache_gc, +DEFINE_EVENT(btree_node, bcache_btree_set_root, + TP_PROTO(struct btree *b), + TP_ARGS(b) +); - TP_PROTO(uint8_t *uuid), +/* Allocator */ - TP_ARGS(uuid), +TRACE_EVENT(bcache_alloc_invalidate, + TP_PROTO(struct cache *ca), + TP_ARGS(ca), TP_STRUCT__entry( - __field(uint8_t *, uuid) + __field(unsigned, free ) + __field(unsigned, free_inc ) + __field(unsigned, free_inc_size ) + __field(unsigned, unused ) ), TP_fast_assign( - __entry->uuid = uuid; + __entry->free = fifo_used(&ca->free); + __entry->free_inc = fifo_used(&ca->free_inc); + __entry->free_inc_size = ca->free_inc.size; + __entry->unused = fifo_used(&ca->unused); ), - TP_printk("%pU", __entry->uuid) + TP_printk("free %u free_inc %u/%u unused %u", __entry->free, + __entry->free_inc, __entry->free_inc_size, __entry->unused) ); +TRACE_EVENT(bcache_alloc_fail, + TP_PROTO(struct cache *ca), + TP_ARGS(ca), -DEFINE_EVENT(bcache_gc, bcache_gc_start, + TP_STRUCT__entry( + __field(unsigned, free ) + __field(unsigned, free_inc ) + __field(unsigned, unused ) + __field(unsigned, blocked ) + ), - TP_PROTO(uint8_t *uuid), + TP_fast_assign( + __entry->free = fifo_used(&ca->free); + __entry->free_inc = fifo_used(&ca->free_inc); + __entry->unused = fifo_used(&ca->unused); + __entry->blocked = atomic_read(&ca->set->prio_blocked); + ), - TP_ARGS(uuid) + TP_printk("free %u free_inc %u unused %u blocked %u", __entry->free, + __entry->free_inc, __entry->unused, __entry->blocked) ); -DEFINE_EVENT(bcache_gc, bcache_gc_end, +/* Background writeback */ - TP_PROTO(uint8_t *uuid), +DEFINE_EVENT(bkey, bcache_writeback, + TP_PROTO(struct bkey *k), + TP_ARGS(k) +); - TP_ARGS(uuid) +DEFINE_EVENT(bkey, bcache_writeback_collision, + TP_PROTO(struct bkey *k), + TP_ARGS(k) ); #endif /* _TRACE_BCACHE_H */ diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h index d615f78cc6b6..41a6643e2136 100644 --- a/include/trace/ftrace.h +++ b/include/trace/ftrace.h @@ -670,10 +670,6 @@ perf_trace_##call(void *__data, proto) \ sizeof(u64)); \ __entry_size -= sizeof(u32); \ \ - if (WARN_ONCE(__entry_size > PERF_MAX_TRACE_SIZE, \ - "profile buffer not large enough")) \ - return; \ - \ entry = (struct ftrace_raw_##call *)perf_trace_buf_prepare( \ __entry_size, event_call->event.type, &__regs, &rctx); \ if (!entry) \ diff --git a/include/xen/interface/io/blkif.h b/include/xen/interface/io/blkif.h index ffd4652de91c..65e12099ef89 100644 --- a/include/xen/interface/io/blkif.h +++ b/include/xen/interface/io/blkif.h @@ -103,12 +103,46 @@ typedef uint64_t blkif_sector_t; #define BLKIF_OP_DISCARD 5 /* + * Recognized if "feature-max-indirect-segments" in present in the backend + * xenbus info. The "feature-max-indirect-segments" node contains the maximum + * number of segments allowed by the backend per request. If the node is + * present, the frontend might use blkif_request_indirect structs in order to + * issue requests with more than BLKIF_MAX_SEGMENTS_PER_REQUEST (11). The + * maximum number of indirect segments is fixed by the backend, but the + * frontend can issue requests with any number of indirect segments as long as + * it's less than the number provided by the backend. The indirect_grefs field + * in blkif_request_indirect should be filled by the frontend with the + * grant references of the pages that are holding the indirect segments. + * This pages are filled with an array of blkif_request_segment_aligned + * that hold the information about the segments. The number of indirect + * pages to use is determined by the maximum number of segments + * a indirect request contains. Every indirect page can contain a maximum + * of 512 segments (PAGE_SIZE/sizeof(blkif_request_segment_aligned)), + * so to calculate the number of indirect pages to use we have to do + * ceil(indirect_segments/512). + * + * If a backend does not recognize BLKIF_OP_INDIRECT, it should *not* + * create the "feature-max-indirect-segments" node! + */ +#define BLKIF_OP_INDIRECT 6 + +/* * Maximum scatter/gather segments per request. * This is carefully chosen so that sizeof(struct blkif_ring) <= PAGE_SIZE. * NB. This could be 12 if the ring indexes weren't stored in the same page. */ #define BLKIF_MAX_SEGMENTS_PER_REQUEST 11 +#define BLKIF_MAX_INDIRECT_PAGES_PER_REQUEST 8 + +struct blkif_request_segment_aligned { + grant_ref_t gref; /* reference to I/O buffer frame */ + /* @first_sect: first sector in frame to transfer (inclusive). */ + /* @last_sect: last sector in frame to transfer (inclusive). */ + uint8_t first_sect, last_sect; + uint16_t _pad; /* padding to make it 8 bytes, so it's cache-aligned */ +} __attribute__((__packed__)); + struct blkif_request_rw { uint8_t nr_segments; /* number of segments */ blkif_vdev_t handle; /* only for read/write requests */ @@ -147,12 +181,31 @@ struct blkif_request_other { uint64_t id; /* private guest value, echoed in resp */ } __attribute__((__packed__)); +struct blkif_request_indirect { + uint8_t indirect_op; + uint16_t nr_segments; +#ifdef CONFIG_X86_64 + uint32_t _pad1; /* offsetof(blkif_...,u.indirect.id) == 8 */ +#endif + uint64_t id; + blkif_sector_t sector_number; + blkif_vdev_t handle; + uint16_t _pad2; + grant_ref_t indirect_grefs[BLKIF_MAX_INDIRECT_PAGES_PER_REQUEST]; +#ifdef CONFIG_X86_64 + uint32_t _pad3; /* make it 64 byte aligned */ +#else + uint64_t _pad3; /* make it 64 byte aligned */ +#endif +} __attribute__((__packed__)); + struct blkif_request { uint8_t operation; /* BLKIF_OP_??? */ union { struct blkif_request_rw rw; struct blkif_request_discard discard; struct blkif_request_other other; + struct blkif_request_indirect indirect; } u; } __attribute__((__packed__)); diff --git a/include/xen/interface/io/ring.h b/include/xen/interface/io/ring.h index 75271b9a8f61..7d28aff605c7 100644 --- a/include/xen/interface/io/ring.h +++ b/include/xen/interface/io/ring.h @@ -188,6 +188,11 @@ struct __name##_back_ring { \ #define RING_REQUEST_CONS_OVERFLOW(_r, _cons) \ (((_cons) - (_r)->rsp_prod_pvt) >= RING_SIZE(_r)) +/* Ill-behaved frontend determination: Can there be this many requests? */ +#define RING_REQUEST_PROD_OVERFLOW(_r, _prod) \ + (((_prod) - (_r)->rsp_prod_pvt) > RING_SIZE(_r)) + + #define RING_PUSH_REQUESTS(_r) do { \ wmb(); /* back sees requests /before/ updated producer index */ \ (_r)->sring->req_prod = (_r)->req_prod_pvt; \ diff --git a/kernel/cgroup.c b/kernel/cgroup.c index 0e0b20b8c5db..789ec4683db3 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -1845,36 +1845,43 @@ out: EXPORT_SYMBOL_GPL(cgroup_path); /** - * task_cgroup_path_from_hierarchy - cgroup path of a task on a hierarchy + * task_cgroup_path - cgroup path of a task in the first cgroup hierarchy * @task: target task - * @hierarchy_id: the hierarchy to look up @task's cgroup from * @buf: the buffer to write the path into * @buflen: the length of the buffer * - * Determine @task's cgroup on the hierarchy specified by @hierarchy_id and - * copy its path into @buf. This function grabs cgroup_mutex and shouldn't - * be used inside locks used by cgroup controller callbacks. + * Determine @task's cgroup on the first (the one with the lowest non-zero + * hierarchy_id) cgroup hierarchy and copy its path into @buf. This + * function grabs cgroup_mutex and shouldn't be used inside locks used by + * cgroup controller callbacks. + * + * Returns 0 on success, fails with -%ENAMETOOLONG if @buflen is too short. */ -int task_cgroup_path_from_hierarchy(struct task_struct *task, int hierarchy_id, - char *buf, size_t buflen) +int task_cgroup_path(struct task_struct *task, char *buf, size_t buflen) { struct cgroupfs_root *root; - struct cgroup *cgrp = NULL; - int ret = -ENOENT; + struct cgroup *cgrp; + int hierarchy_id = 1, ret = 0; + + if (buflen < 2) + return -ENAMETOOLONG; mutex_lock(&cgroup_mutex); - root = idr_find(&cgroup_hierarchy_idr, hierarchy_id); + root = idr_get_next(&cgroup_hierarchy_idr, &hierarchy_id); + if (root) { cgrp = task_cgroup_from_root(task, root); ret = cgroup_path(cgrp, buf, buflen); + } else { + /* if no hierarchy exists, everyone is in "/" */ + memcpy(buf, "/", 2); } mutex_unlock(&cgroup_mutex); - return ret; } -EXPORT_SYMBOL_GPL(task_cgroup_path_from_hierarchy); +EXPORT_SYMBOL_GPL(task_cgroup_path); /* * Control Group taskset diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c index e444ff88f0a4..cc2f66f68dc5 100644 --- a/kernel/trace/ring_buffer.c +++ b/kernel/trace/ring_buffer.c @@ -36,11 +36,11 @@ int ring_buffer_print_entry_header(struct trace_seq *s) { int ret; - ret = trace_seq_printf(s, "# compressed entry header\n"); - ret = trace_seq_printf(s, "\ttype_len : 5 bits\n"); - ret = trace_seq_printf(s, "\ttime_delta : 27 bits\n"); - ret = trace_seq_printf(s, "\tarray : 32 bits\n"); - ret = trace_seq_printf(s, "\n"); + ret = trace_seq_puts(s, "# compressed entry header\n"); + ret = trace_seq_puts(s, "\ttype_len : 5 bits\n"); + ret = trace_seq_puts(s, "\ttime_delta : 27 bits\n"); + ret = trace_seq_puts(s, "\tarray : 32 bits\n"); + ret = trace_seq_putc(s, '\n'); ret = trace_seq_printf(s, "\tpadding : type == %d\n", RINGBUF_TYPE_PADDING); ret = trace_seq_printf(s, "\ttime_extend : type == %d\n", @@ -1066,7 +1066,7 @@ static int rb_check_list(struct ring_buffer_per_cpu *cpu_buffer, } /** - * check_pages - integrity check of buffer pages + * rb_check_pages - integrity check of buffer pages * @cpu_buffer: CPU buffer with pages to test * * As a safety measure we check to make sure the data pages have not @@ -1258,7 +1258,7 @@ static int rb_cpu_notify(struct notifier_block *self, #endif /** - * ring_buffer_alloc - allocate a new ring_buffer + * __ring_buffer_alloc - allocate a new ring_buffer * @size: the size in bytes per cpu that is needed. * @flags: attributes to set for the ring buffer. * @@ -1607,6 +1607,7 @@ static void update_pages_handler(struct work_struct *work) * ring_buffer_resize - resize the ring buffer * @buffer: the buffer to resize. * @size: the new size. + * @cpu_id: the cpu buffer to resize * * Minimum size is 2 * BUF_PAGE_SIZE. * @@ -3956,11 +3957,11 @@ EXPORT_SYMBOL_GPL(ring_buffer_consume); * expected. * * After a sequence of ring_buffer_read_prepare calls, the user is - * expected to make at least one call to ring_buffer_prepare_sync. + * expected to make at least one call to ring_buffer_read_prepare_sync. * Afterwards, ring_buffer_read_start is invoked to get things going * for real. * - * This overall must be paired with ring_buffer_finish. + * This overall must be paired with ring_buffer_read_finish. */ struct ring_buffer_iter * ring_buffer_read_prepare(struct ring_buffer *buffer, int cpu) @@ -4009,7 +4010,7 @@ EXPORT_SYMBOL_GPL(ring_buffer_read_prepare_sync); * an intervening ring_buffer_read_prepare_sync must have been * performed. * - * Must be paired with ring_buffer_finish. + * Must be paired with ring_buffer_read_finish. */ void ring_buffer_read_start(struct ring_buffer_iter *iter) @@ -4031,7 +4032,7 @@ ring_buffer_read_start(struct ring_buffer_iter *iter) EXPORT_SYMBOL_GPL(ring_buffer_read_start); /** - * ring_buffer_finish - finish reading the iterator of the buffer + * ring_buffer_read_finish - finish reading the iterator of the buffer * @iter: The iterator retrieved by ring_buffer_start * * This re-enables the recording to the buffer, and frees the @@ -4346,6 +4347,7 @@ EXPORT_SYMBOL_GPL(ring_buffer_swap_cpu); /** * ring_buffer_alloc_read_page - allocate a page to read from buffer * @buffer: the buffer to allocate for. + * @cpu: the cpu buffer to allocate. * * This function is used in conjunction with ring_buffer_read_page. * When reading a full page from the ring buffer, these functions @@ -4403,7 +4405,7 @@ EXPORT_SYMBOL_GPL(ring_buffer_free_read_page); * to swap with a page in the ring buffer. * * for example: - * rpage = ring_buffer_alloc_read_page(buffer); + * rpage = ring_buffer_alloc_read_page(buffer, cpu); * if (!rpage) * return error; * ret = ring_buffer_read_page(buffer, &rpage, len, cpu, 0); diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 0cd500bffd9b..3f2477713aca 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -3008,7 +3008,6 @@ static int tracing_release(struct inode *inode, struct file *file) iter = m->private; tr = iter->tr; - trace_array_put(tr); mutex_lock(&trace_types_lock); @@ -3023,6 +3022,9 @@ static int tracing_release(struct inode *inode, struct file *file) if (!iter->snapshot) /* reenable tracing if it was previously enabled */ tracing_start_tr(tr); + + __trace_array_put(tr); + mutex_unlock(&trace_types_lock); mutex_destroy(&iter->mutex); @@ -3447,6 +3449,7 @@ tracing_trace_options_write(struct file *filp, const char __user *ubuf, static int tracing_trace_options_open(struct inode *inode, struct file *file) { struct trace_array *tr = inode->i_private; + int ret; if (tracing_disabled) return -ENODEV; @@ -3454,7 +3457,11 @@ static int tracing_trace_options_open(struct inode *inode, struct file *file) if (trace_array_get(tr) < 0) return -ENODEV; - return single_open(file, tracing_trace_options_show, inode->i_private); + ret = single_open(file, tracing_trace_options_show, inode->i_private); + if (ret < 0) + trace_array_put(tr); + + return ret; } static const struct file_operations tracing_iter_fops = { @@ -3537,14 +3544,14 @@ static const char readme_msg[] = "\n snapshot\t\t- Like 'trace' but shows the content of the static snapshot buffer\n" "\t\t\t Read the contents for more information\n" #endif -#ifdef CONFIG_STACKTRACE +#ifdef CONFIG_STACK_TRACER " stack_trace\t\t- Shows the max stack trace when active\n" " stack_max_size\t- Shows current max stack size that was traced\n" "\t\t\t Write into this file to reset the max size (trigger a new trace)\n" #ifdef CONFIG_DYNAMIC_FTRACE " stack_trace_filter\t- Like set_ftrace_filter but limits what stack_trace traces\n" #endif -#endif /* CONFIG_STACKTRACE */ +#endif /* CONFIG_STACK_TRACER */ ; static ssize_t @@ -3958,6 +3965,7 @@ static int tracing_open_pipe(struct inode *inode, struct file *filp) iter = kzalloc(sizeof(*iter), GFP_KERNEL); if (!iter) { ret = -ENOMEM; + __trace_array_put(tr); goto out; } @@ -4704,21 +4712,24 @@ static int tracing_snapshot_open(struct inode *inode, struct file *file) ret = PTR_ERR(iter); } else { /* Writes still need the seq_file to hold the private data */ + ret = -ENOMEM; m = kzalloc(sizeof(*m), GFP_KERNEL); if (!m) - return -ENOMEM; + goto out; iter = kzalloc(sizeof(*iter), GFP_KERNEL); if (!iter) { kfree(m); - return -ENOMEM; + goto out; } + ret = 0; + iter->tr = tr; iter->trace_buffer = &tc->tr->max_buffer; iter->cpu_file = tc->cpu; m->private = iter; file->private_data = m; } - +out: if (ret < 0) trace_array_put(tr); @@ -4948,8 +4959,6 @@ static int tracing_buffers_open(struct inode *inode, struct file *filp) mutex_lock(&trace_types_lock); - tr->ref++; - info->iter.tr = tr; info->iter.cpu_file = tc->cpu; info->iter.trace = tr->current_trace; @@ -5328,9 +5337,10 @@ tracing_stats_read(struct file *filp, char __user *ubuf, } static const struct file_operations tracing_stats_fops = { - .open = tracing_open_generic, + .open = tracing_open_generic_tc, .read = tracing_stats_read, .llseek = generic_file_llseek, + .release = tracing_release_generic_tc, }; #ifdef CONFIG_DYNAMIC_FTRACE @@ -5973,8 +5983,10 @@ static int new_instance_create(const char *name) goto out_free_tr; ret = event_trace_add_tracer(tr->dir, tr); - if (ret) + if (ret) { + debugfs_remove_recursive(tr->dir); goto out_free_tr; + } init_tracer_debugfs(tr, tr->dir); diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index 4a4f6e1828b6..e7d643b8a907 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -214,7 +214,6 @@ struct trace_array { struct dentry *event_dir; struct list_head systems; struct list_head events; - struct task_struct *waiter; int ref; }; @@ -680,6 +679,15 @@ extern int trace_selftest_startup_sched_switch(struct tracer *trace, struct trace_array *tr); extern int trace_selftest_startup_branch(struct tracer *trace, struct trace_array *tr); +/* + * Tracer data references selftest functions that only occur + * on boot up. These can be __init functions. Thus, when selftests + * are enabled, then the tracers need to reference __init functions. + */ +#define __tracer_data __refdata +#else +/* Tracers are seldom changed. Optimize when selftests are disabled. */ +#define __tracer_data __read_mostly #endif /* CONFIG_FTRACE_STARTUP_TEST */ extern void *head_page(struct trace_array_cpu *data); diff --git a/kernel/trace/trace_event_perf.c b/kernel/trace/trace_event_perf.c index 84b1e045faba..80c36bcf66e8 100644 --- a/kernel/trace/trace_event_perf.c +++ b/kernel/trace/trace_event_perf.c @@ -236,6 +236,10 @@ __kprobes void *perf_trace_buf_prepare(int size, unsigned short type, BUILD_BUG_ON(PERF_MAX_TRACE_SIZE % sizeof(unsigned long)); + if (WARN_ONCE(size > PERF_MAX_TRACE_SIZE, + "perf buffer not large enough")) + return NULL; + pc = preempt_count(); *rctxp = perf_swevent_get_recursion_context(); @@ -266,6 +270,10 @@ perf_ftrace_function_call(unsigned long ip, unsigned long parent_ip, struct pt_regs regs; int rctx; + head = this_cpu_ptr(event_function.perf_events); + if (hlist_empty(head)) + return; + #define ENTRY_SIZE (ALIGN(sizeof(struct ftrace_entry) + sizeof(u32), \ sizeof(u64)) - sizeof(u32)) @@ -279,8 +287,6 @@ perf_ftrace_function_call(unsigned long ip, unsigned long parent_ip, entry->ip = ip; entry->parent_ip = parent_ip; - - head = this_cpu_ptr(event_function.perf_events); perf_trace_buf_submit(entry, ENTRY_SIZE, rctx, 0, 1, ®s, head, NULL); diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c index 7d854290bf81..898f868833f2 100644 --- a/kernel/trace/trace_events.c +++ b/kernel/trace/trace_events.c @@ -826,59 +826,33 @@ enum { static void *f_next(struct seq_file *m, void *v, loff_t *pos) { struct ftrace_event_call *call = m->private; - struct ftrace_event_field *field; struct list_head *common_head = &ftrace_common_fields; struct list_head *head = trace_get_fields(call); + struct list_head *node = v; (*pos)++; switch ((unsigned long)v) { case FORMAT_HEADER: - if (unlikely(list_empty(common_head))) - return NULL; - - field = list_entry(common_head->prev, - struct ftrace_event_field, link); - return field; + node = common_head; + break; case FORMAT_FIELD_SEPERATOR: - if (unlikely(list_empty(head))) - return NULL; - - field = list_entry(head->prev, struct ftrace_event_field, link); - return field; + node = head; + break; case FORMAT_PRINTFMT: /* all done */ return NULL; } - field = v; - if (field->link.prev == common_head) + node = node->prev; + if (node == common_head) return (void *)FORMAT_FIELD_SEPERATOR; - else if (field->link.prev == head) + else if (node == head) return (void *)FORMAT_PRINTFMT; - - field = list_entry(field->link.prev, struct ftrace_event_field, link); - - return field; -} - -static void *f_start(struct seq_file *m, loff_t *pos) -{ - loff_t l = 0; - void *p; - - /* Start by showing the header */ - if (!*pos) - return (void *)FORMAT_HEADER; - - p = (void *)FORMAT_HEADER; - do { - p = f_next(m, p, &l); - } while (p && l < *pos); - - return p; + else + return node; } static int f_show(struct seq_file *m, void *v) @@ -904,8 +878,7 @@ static int f_show(struct seq_file *m, void *v) return 0; } - field = v; - + field = list_entry(v, struct ftrace_event_field, link); /* * Smartly shows the array type(except dynamic array). * Normal: @@ -932,6 +905,17 @@ static int f_show(struct seq_file *m, void *v) return 0; } +static void *f_start(struct seq_file *m, loff_t *pos) +{ + void *p = (void *)FORMAT_HEADER; + loff_t l = 0; + + while (l < *pos && p) + p = f_next(m, p, &l); + + return p; +} + static void f_stop(struct seq_file *m, void *p) { } @@ -963,23 +947,14 @@ static ssize_t event_id_read(struct file *filp, char __user *ubuf, size_t cnt, loff_t *ppos) { struct ftrace_event_call *call = filp->private_data; - struct trace_seq *s; - int r; + char buf[32]; + int len; if (*ppos) return 0; - s = kmalloc(sizeof(*s), GFP_KERNEL); - if (!s) - return -ENOMEM; - - trace_seq_init(s); - trace_seq_printf(s, "%d\n", call->event.type); - - r = simple_read_from_buffer(ubuf, cnt, ppos, - s->buffer, s->len); - kfree(s); - return r; + len = sprintf(buf, "%d\n", call->event.type); + return simple_read_from_buffer(ubuf, cnt, ppos, buf, len); } static ssize_t @@ -1218,6 +1193,7 @@ show_header(struct file *filp, char __user *ubuf, size_t cnt, loff_t *ppos) static int ftrace_event_avail_open(struct inode *inode, struct file *file); static int ftrace_event_set_open(struct inode *inode, struct file *file); +static int ftrace_event_release(struct inode *inode, struct file *file); static const struct seq_operations show_event_seq_ops = { .start = t_start, @@ -1245,7 +1221,7 @@ static const struct file_operations ftrace_set_event_fops = { .read = seq_read, .write = ftrace_event_write, .llseek = seq_lseek, - .release = seq_release, + .release = ftrace_event_release, }; static const struct file_operations ftrace_enable_fops = { @@ -1323,6 +1299,15 @@ ftrace_event_open(struct inode *inode, struct file *file, return ret; } +static int ftrace_event_release(struct inode *inode, struct file *file) +{ + struct trace_array *tr = inode->i_private; + + trace_array_put(tr); + + return seq_release(inode, file); +} + static int ftrace_event_avail_open(struct inode *inode, struct file *file) { @@ -1336,12 +1321,19 @@ ftrace_event_set_open(struct inode *inode, struct file *file) { const struct seq_operations *seq_ops = &show_set_event_seq_ops; struct trace_array *tr = inode->i_private; + int ret; + + if (trace_array_get(tr) < 0) + return -ENODEV; if ((file->f_mode & FMODE_WRITE) && (file->f_flags & O_TRUNC)) ftrace_clear_events(tr); - return ftrace_event_open(inode, file, seq_ops); + ret = ftrace_event_open(inode, file, seq_ops); + if (ret < 0) + trace_array_put(tr); + return ret; } static struct event_subsystem * diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c index 0d883dc057d6..0c7b75a8acc8 100644 --- a/kernel/trace/trace_events_filter.c +++ b/kernel/trace/trace_events_filter.c @@ -646,7 +646,7 @@ void print_event_filter(struct ftrace_event_call *call, struct trace_seq *s) if (filter && filter->filter_string) trace_seq_printf(s, "%s\n", filter->filter_string); else - trace_seq_printf(s, "none\n"); + trace_seq_puts(s, "none\n"); mutex_unlock(&event_mutex); } @@ -660,7 +660,7 @@ void print_subsystem_event_filter(struct event_subsystem *system, if (filter && filter->filter_string) trace_seq_printf(s, "%s\n", filter->filter_string); else - trace_seq_printf(s, DEFAULT_SYS_FILTER_MESSAGE "\n"); + trace_seq_puts(s, DEFAULT_SYS_FILTER_MESSAGE "\n"); mutex_unlock(&event_mutex); } diff --git a/kernel/trace/trace_functions.c b/kernel/trace/trace_functions.c index b863f93b30f3..38fe1483c508 100644 --- a/kernel/trace/trace_functions.c +++ b/kernel/trace/trace_functions.c @@ -199,7 +199,7 @@ static int func_set_flag(u32 old_flags, u32 bit, int set) return 0; } -static struct tracer function_trace __read_mostly = +static struct tracer function_trace __tracer_data = { .name = "function", .init = function_trace_init, diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c index 8388bc99f2ee..b5c09242683d 100644 --- a/kernel/trace/trace_functions_graph.c +++ b/kernel/trace/trace_functions_graph.c @@ -446,7 +446,7 @@ print_graph_proc(struct trace_seq *s, pid_t pid) /* First spaces to align center */ for (i = 0; i < spaces / 2; i++) { - ret = trace_seq_printf(s, " "); + ret = trace_seq_putc(s, ' '); if (!ret) return TRACE_TYPE_PARTIAL_LINE; } @@ -457,7 +457,7 @@ print_graph_proc(struct trace_seq *s, pid_t pid) /* Last spaces to align center */ for (i = 0; i < spaces - (spaces / 2); i++) { - ret = trace_seq_printf(s, " "); + ret = trace_seq_putc(s, ' '); if (!ret) return TRACE_TYPE_PARTIAL_LINE; } @@ -503,7 +503,7 @@ verif_pid(struct trace_seq *s, pid_t pid, int cpu, struct fgraph_data *data) ------------------------------------------ */ - ret = trace_seq_printf(s, + ret = trace_seq_puts(s, " ------------------------------------------\n"); if (!ret) return TRACE_TYPE_PARTIAL_LINE; @@ -516,7 +516,7 @@ verif_pid(struct trace_seq *s, pid_t pid, int cpu, struct fgraph_data *data) if (ret == TRACE_TYPE_PARTIAL_LINE) return TRACE_TYPE_PARTIAL_LINE; - ret = trace_seq_printf(s, " => "); + ret = trace_seq_puts(s, " => "); if (!ret) return TRACE_TYPE_PARTIAL_LINE; @@ -524,7 +524,7 @@ verif_pid(struct trace_seq *s, pid_t pid, int cpu, struct fgraph_data *data) if (ret == TRACE_TYPE_PARTIAL_LINE) return TRACE_TYPE_PARTIAL_LINE; - ret = trace_seq_printf(s, + ret = trace_seq_puts(s, "\n ------------------------------------------\n\n"); if (!ret) return TRACE_TYPE_PARTIAL_LINE; @@ -645,7 +645,7 @@ print_graph_irq(struct trace_iterator *iter, unsigned long addr, ret = print_graph_proc(s, pid); if (ret == TRACE_TYPE_PARTIAL_LINE) return TRACE_TYPE_PARTIAL_LINE; - ret = trace_seq_printf(s, " | "); + ret = trace_seq_puts(s, " | "); if (!ret) return TRACE_TYPE_PARTIAL_LINE; } @@ -657,9 +657,9 @@ print_graph_irq(struct trace_iterator *iter, unsigned long addr, return ret; if (type == TRACE_GRAPH_ENT) - ret = trace_seq_printf(s, "==========>"); + ret = trace_seq_puts(s, "==========>"); else - ret = trace_seq_printf(s, "<=========="); + ret = trace_seq_puts(s, "<=========="); if (!ret) return TRACE_TYPE_PARTIAL_LINE; @@ -668,7 +668,7 @@ print_graph_irq(struct trace_iterator *iter, unsigned long addr, if (ret != TRACE_TYPE_HANDLED) return ret; - ret = trace_seq_printf(s, "\n"); + ret = trace_seq_putc(s, '\n'); if (!ret) return TRACE_TYPE_PARTIAL_LINE; @@ -705,13 +705,13 @@ trace_print_graph_duration(unsigned long long duration, struct trace_seq *s) len += strlen(nsecs_str); } - ret = trace_seq_printf(s, " us "); + ret = trace_seq_puts(s, " us "); if (!ret) return TRACE_TYPE_PARTIAL_LINE; /* Print remaining spaces to fit the row's width */ for (i = len; i < 7; i++) { - ret = trace_seq_printf(s, " "); + ret = trace_seq_putc(s, ' '); if (!ret) return TRACE_TYPE_PARTIAL_LINE; } @@ -731,13 +731,13 @@ print_graph_duration(unsigned long long duration, struct trace_seq *s, /* No real adata, just filling the column with spaces */ switch (duration) { case DURATION_FILL_FULL: - ret = trace_seq_printf(s, " | "); + ret = trace_seq_puts(s, " | "); return ret ? TRACE_TYPE_HANDLED : TRACE_TYPE_PARTIAL_LINE; case DURATION_FILL_START: - ret = trace_seq_printf(s, " "); + ret = trace_seq_puts(s, " "); return ret ? TRACE_TYPE_HANDLED : TRACE_TYPE_PARTIAL_LINE; case DURATION_FILL_END: - ret = trace_seq_printf(s, " |"); + ret = trace_seq_puts(s, " |"); return ret ? TRACE_TYPE_HANDLED : TRACE_TYPE_PARTIAL_LINE; } @@ -745,10 +745,10 @@ print_graph_duration(unsigned long long duration, struct trace_seq *s, if (flags & TRACE_GRAPH_PRINT_OVERHEAD) { /* Duration exceeded 100 msecs */ if (duration > 100000ULL) - ret = trace_seq_printf(s, "! "); + ret = trace_seq_puts(s, "! "); /* Duration exceeded 10 msecs */ else if (duration > 10000ULL) - ret = trace_seq_printf(s, "+ "); + ret = trace_seq_puts(s, "+ "); } /* @@ -757,7 +757,7 @@ print_graph_duration(unsigned long long duration, struct trace_seq *s, * to fill out the space. */ if (ret == -1) - ret = trace_seq_printf(s, " "); + ret = trace_seq_puts(s, " "); /* Catching here any failure happenned above */ if (!ret) @@ -767,7 +767,7 @@ print_graph_duration(unsigned long long duration, struct trace_seq *s, if (ret != TRACE_TYPE_HANDLED) return ret; - ret = trace_seq_printf(s, "| "); + ret = trace_seq_puts(s, "| "); if (!ret) return TRACE_TYPE_PARTIAL_LINE; @@ -817,7 +817,7 @@ print_graph_entry_leaf(struct trace_iterator *iter, /* Function */ for (i = 0; i < call->depth * TRACE_GRAPH_INDENT; i++) { - ret = trace_seq_printf(s, " "); + ret = trace_seq_putc(s, ' '); if (!ret) return TRACE_TYPE_PARTIAL_LINE; } @@ -858,7 +858,7 @@ print_graph_entry_nested(struct trace_iterator *iter, /* Function */ for (i = 0; i < call->depth * TRACE_GRAPH_INDENT; i++) { - ret = trace_seq_printf(s, " "); + ret = trace_seq_putc(s, ' '); if (!ret) return TRACE_TYPE_PARTIAL_LINE; } @@ -917,7 +917,7 @@ print_graph_prologue(struct trace_iterator *iter, struct trace_seq *s, if (ret == TRACE_TYPE_PARTIAL_LINE) return TRACE_TYPE_PARTIAL_LINE; - ret = trace_seq_printf(s, " | "); + ret = trace_seq_puts(s, " | "); if (!ret) return TRACE_TYPE_PARTIAL_LINE; } @@ -1117,7 +1117,7 @@ print_graph_return(struct ftrace_graph_ret *trace, struct trace_seq *s, /* Closing brace */ for (i = 0; i < trace->depth * TRACE_GRAPH_INDENT; i++) { - ret = trace_seq_printf(s, " "); + ret = trace_seq_putc(s, ' '); if (!ret) return TRACE_TYPE_PARTIAL_LINE; } @@ -1129,7 +1129,7 @@ print_graph_return(struct ftrace_graph_ret *trace, struct trace_seq *s, * belongs to, write out the function name. */ if (func_match) { - ret = trace_seq_printf(s, "}\n"); + ret = trace_seq_puts(s, "}\n"); if (!ret) return TRACE_TYPE_PARTIAL_LINE; } else { @@ -1179,13 +1179,13 @@ print_graph_comment(struct trace_seq *s, struct trace_entry *ent, /* Indentation */ if (depth > 0) for (i = 0; i < (depth + 1) * TRACE_GRAPH_INDENT; i++) { - ret = trace_seq_printf(s, " "); + ret = trace_seq_putc(s, ' '); if (!ret) return TRACE_TYPE_PARTIAL_LINE; } /* The comment */ - ret = trace_seq_printf(s, "/* "); + ret = trace_seq_puts(s, "/* "); if (!ret) return TRACE_TYPE_PARTIAL_LINE; @@ -1216,7 +1216,7 @@ print_graph_comment(struct trace_seq *s, struct trace_entry *ent, s->len--; } - ret = trace_seq_printf(s, " */\n"); + ret = trace_seq_puts(s, " */\n"); if (!ret) return TRACE_TYPE_PARTIAL_LINE; @@ -1448,7 +1448,7 @@ static struct trace_event graph_trace_ret_event = { .funcs = &graph_functions }; -static struct tracer graph_trace __read_mostly = { +static struct tracer graph_trace __tracer_data = { .name = "function_graph", .open = graph_trace_open, .pipe_open = graph_trace_open, diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c index 7ed6976493c8..3811487e7a7a 100644 --- a/kernel/trace/trace_kprobe.c +++ b/kernel/trace/trace_kprobe.c @@ -243,11 +243,11 @@ find_event_file_link(struct trace_probe *tp, struct ftrace_event_file *file) static int disable_trace_probe(struct trace_probe *tp, struct ftrace_event_file *file) { + struct event_file_link *link = NULL; + int wait = 0; int ret = 0; if (file) { - struct event_file_link *link; - link = find_event_file_link(tp, file); if (!link) { ret = -EINVAL; @@ -255,10 +255,7 @@ disable_trace_probe(struct trace_probe *tp, struct ftrace_event_file *file) } list_del_rcu(&link->list); - /* synchronize with kprobe_trace_func/kretprobe_trace_func */ - synchronize_sched(); - kfree(link); - + wait = 1; if (!list_empty(&tp->files)) goto out; @@ -271,8 +268,22 @@ disable_trace_probe(struct trace_probe *tp, struct ftrace_event_file *file) disable_kretprobe(&tp->rp); else disable_kprobe(&tp->rp.kp); + wait = 1; } out: + if (wait) { + /* + * Synchronize with kprobe_trace_func/kretprobe_trace_func + * to ensure disabled (all running handlers are finished). + * This is not only for kfree(), but also the caller, + * trace_remove_event_call() supposes it for releasing + * event_call related objects, which will be accessed in + * the kprobe_trace_func/kretprobe_trace_func. + */ + synchronize_sched(); + kfree(link); /* Ignored if link == NULL */ + } + return ret; } @@ -1087,9 +1098,6 @@ kprobe_perf_func(struct trace_probe *tp, struct pt_regs *regs) __size = sizeof(*entry) + tp->size + dsize; size = ALIGN(__size + sizeof(u32), sizeof(u64)); size -= sizeof(u32); - if (WARN_ONCE(size > PERF_MAX_TRACE_SIZE, - "profile buffer not large enough")) - return; entry = perf_trace_buf_prepare(size, call->event.type, regs, &rctx); if (!entry) @@ -1120,9 +1128,6 @@ kretprobe_perf_func(struct trace_probe *tp, struct kretprobe_instance *ri, __size = sizeof(*entry) + tp->size + dsize; size = ALIGN(__size + sizeof(u32), sizeof(u64)); size -= sizeof(u32); - if (WARN_ONCE(size > PERF_MAX_TRACE_SIZE, - "profile buffer not large enough")) - return; entry = perf_trace_buf_prepare(size, call->event.type, regs, &rctx); if (!entry) diff --git a/kernel/trace/trace_mmiotrace.c b/kernel/trace/trace_mmiotrace.c index a5e8f4878bfa..b3dcfb2f0fef 100644 --- a/kernel/trace/trace_mmiotrace.c +++ b/kernel/trace/trace_mmiotrace.c @@ -90,7 +90,7 @@ static int mmio_print_pcidev(struct trace_seq *s, const struct pci_dev *dev) if (drv) ret += trace_seq_printf(s, " %s\n", drv->name); else - ret += trace_seq_printf(s, " \n"); + ret += trace_seq_puts(s, " \n"); return ret; } @@ -107,7 +107,7 @@ static void mmio_pipe_open(struct trace_iterator *iter) struct header_iter *hiter; struct trace_seq *s = &iter->seq; - trace_seq_printf(s, "VERSION 20070824\n"); + trace_seq_puts(s, "VERSION 20070824\n"); hiter = kzalloc(sizeof(*hiter), GFP_KERNEL); if (!hiter) @@ -209,7 +209,7 @@ static enum print_line_t mmio_print_rw(struct trace_iterator *iter) (rw->value >> 0) & 0xff, rw->pc, 0); break; default: - ret = trace_seq_printf(s, "rw what?\n"); + ret = trace_seq_puts(s, "rw what?\n"); break; } if (ret) @@ -245,7 +245,7 @@ static enum print_line_t mmio_print_map(struct trace_iterator *iter) secs, usec_rem, m->map_id, 0UL, 0); break; default: - ret = trace_seq_printf(s, "map what?\n"); + ret = trace_seq_puts(s, "map what?\n"); break; } if (ret) diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c index bb922d9ee51b..34e7cbac0c9c 100644 --- a/kernel/trace/trace_output.c +++ b/kernel/trace/trace_output.c @@ -78,7 +78,7 @@ enum print_line_t trace_print_printk_msg_only(struct trace_iterator *iter) trace_assign_type(field, entry); - ret = trace_seq_printf(s, "%s", field->buf); + ret = trace_seq_puts(s, field->buf); if (!ret) return TRACE_TYPE_PARTIAL_LINE; @@ -558,14 +558,14 @@ seq_print_userip_objs(const struct userstack_entry *entry, struct trace_seq *s, if (ret) ret = trace_seq_puts(s, "??"); if (ret) - ret = trace_seq_puts(s, "\n"); + ret = trace_seq_putc(s, '\n'); continue; } if (!ret) break; if (ret) ret = seq_print_user_ip(s, mm, ip, sym_flags); - ret = trace_seq_puts(s, "\n"); + ret = trace_seq_putc(s, '\n'); } if (mm) @@ -579,7 +579,7 @@ seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags) int ret; if (!ip) - return trace_seq_printf(s, "0"); + return trace_seq_putc(s, '0'); if (sym_flags & TRACE_ITER_SYM_OFFSET) ret = seq_print_sym_offset(s, "%s", ip); @@ -964,14 +964,14 @@ static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags, goto partial; if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) { - if (!trace_seq_printf(s, " <-")) + if (!trace_seq_puts(s, " <-")) goto partial; if (!seq_print_ip_sym(s, field->parent_ip, flags)) goto partial; } - if (!trace_seq_printf(s, "\n")) + if (!trace_seq_putc(s, '\n')) goto partial; return TRACE_TYPE_HANDLED; @@ -1210,7 +1210,7 @@ static enum print_line_t trace_stack_print(struct trace_iterator *iter, if (!seq_print_ip_sym(s, *p, flags)) goto partial; - if (!trace_seq_puts(s, "\n")) + if (!trace_seq_putc(s, '\n')) goto partial; } diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c index 322e16461072..8fd03657bc7d 100644 --- a/kernel/trace/trace_syscalls.c +++ b/kernel/trace/trace_syscalls.c @@ -175,7 +175,7 @@ print_syscall_exit(struct trace_iterator *iter, int flags, entry = syscall_nr_to_meta(syscall); if (!entry) { - trace_seq_printf(s, "\n"); + trace_seq_putc(s, '\n'); return TRACE_TYPE_HANDLED; } @@ -566,15 +566,15 @@ static void perf_syscall_enter(void *ignore, struct pt_regs *regs, long id) if (!sys_data) return; + head = this_cpu_ptr(sys_data->enter_event->perf_events); + if (hlist_empty(head)) + return; + /* get the size after alignment with the u32 buffer size field */ size = sizeof(unsigned long) * sys_data->nb_args + sizeof(*rec); size = ALIGN(size + sizeof(u32), sizeof(u64)); size -= sizeof(u32); - if (WARN_ONCE(size > PERF_MAX_TRACE_SIZE, - "perf buffer not large enough")) - return; - rec = (struct syscall_trace_enter *)perf_trace_buf_prepare(size, sys_data->enter_event->event.type, regs, &rctx); if (!rec) @@ -583,8 +583,6 @@ static void perf_syscall_enter(void *ignore, struct pt_regs *regs, long id) rec->nr = syscall_nr; syscall_get_arguments(current, regs, 0, sys_data->nb_args, (unsigned long *)&rec->args); - - head = this_cpu_ptr(sys_data->enter_event->perf_events); perf_trace_buf_submit(rec, size, rctx, 0, 1, regs, head, NULL); } @@ -642,18 +640,14 @@ static void perf_syscall_exit(void *ignore, struct pt_regs *regs, long ret) if (!sys_data) return; + head = this_cpu_ptr(sys_data->exit_event->perf_events); + if (hlist_empty(head)) + return; + /* We can probably do that at build time */ size = ALIGN(sizeof(*rec) + sizeof(u32), sizeof(u64)); size -= sizeof(u32); - /* - * Impossible, but be paranoid with the future - * How to put this check outside runtime? - */ - if (WARN_ONCE(size > PERF_MAX_TRACE_SIZE, - "exit event has grown above perf buffer size")) - return; - rec = (struct syscall_trace_exit *)perf_trace_buf_prepare(size, sys_data->exit_event->event.type, regs, &rctx); if (!rec) @@ -661,8 +655,6 @@ static void perf_syscall_exit(void *ignore, struct pt_regs *regs, long ret) rec->nr = syscall_nr; rec->ret = syscall_get_return_value(current, regs); - - head = this_cpu_ptr(sys_data->exit_event->perf_events); perf_trace_buf_submit(rec, size, rctx, 0, 1, regs, head, NULL); } diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c index d5d0cd368a56..a23d2d71188e 100644 --- a/kernel/trace/trace_uprobe.c +++ b/kernel/trace/trace_uprobe.c @@ -818,8 +818,6 @@ static void uprobe_perf_print(struct trace_uprobe *tu, size = SIZEOF_TRACE_ENTRY(is_ret_probe(tu)); size = ALIGN(size + tu->size + sizeof(u32), sizeof(u64)) - sizeof(u32); - if (WARN_ONCE(size > PERF_MAX_TRACE_SIZE, "profile buffer not large enough")) - return; preempt_disable(); head = this_cpu_ptr(call->perf_events); diff --git a/kernel/wait.c b/kernel/wait.c index ce0daa320a26..dec68bd4e9d8 100644 --- a/kernel/wait.c +++ b/kernel/wait.c @@ -333,7 +333,8 @@ int __wait_on_atomic_t(wait_queue_head_t *wq, struct wait_bit_queue *q, prepare_to_wait(wq, &q->wait, mode); val = q->key.flags; if (atomic_read(val) == 0) - ret = (*action)(val); + break; + ret = (*action)(val); } while (!ret && atomic_read(val) != 0); finish_wait(wq, &q->wait); return ret; diff --git a/lib/Kconfig b/lib/Kconfig index 35da51359d40..71d9f81f6eed 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -66,8 +66,6 @@ config CRC16 config CRC_T10DIF tristate "CRC calculation for the T10 Data Integrity Field" - select CRYPTO - select CRYPTO_CRCT10DIF help This option is only needed if a module that's not in the kernel tree needs to calculate CRC checks for use with the diff --git a/lib/crc-t10dif.c b/lib/crc-t10dif.c index fe3428c07b47..fbbd66ed86cd 100644 --- a/lib/crc-t10dif.c +++ b/lib/crc-t10dif.c @@ -11,44 +11,57 @@ #include <linux/types.h> #include <linux/module.h> #include <linux/crc-t10dif.h> -#include <linux/err.h> -#include <linux/init.h> -#include <crypto/hash.h> -static struct crypto_shash *crct10dif_tfm; +/* Table generated using the following polynomium: + * x^16 + x^15 + x^11 + x^9 + x^8 + x^7 + x^5 + x^4 + x^2 + x + 1 + * gt: 0x8bb7 + */ +static const __u16 t10_dif_crc_table[256] = { + 0x0000, 0x8BB7, 0x9CD9, 0x176E, 0xB205, 0x39B2, 0x2EDC, 0xA56B, + 0xEFBD, 0x640A, 0x7364, 0xF8D3, 0x5DB8, 0xD60F, 0xC161, 0x4AD6, + 0x54CD, 0xDF7A, 0xC814, 0x43A3, 0xE6C8, 0x6D7F, 0x7A11, 0xF1A6, + 0xBB70, 0x30C7, 0x27A9, 0xAC1E, 0x0975, 0x82C2, 0x95AC, 0x1E1B, + 0xA99A, 0x222D, 0x3543, 0xBEF4, 0x1B9F, 0x9028, 0x8746, 0x0CF1, + 0x4627, 0xCD90, 0xDAFE, 0x5149, 0xF422, 0x7F95, 0x68FB, 0xE34C, + 0xFD57, 0x76E0, 0x618E, 0xEA39, 0x4F52, 0xC4E5, 0xD38B, 0x583C, + 0x12EA, 0x995D, 0x8E33, 0x0584, 0xA0EF, 0x2B58, 0x3C36, 0xB781, + 0xD883, 0x5334, 0x445A, 0xCFED, 0x6A86, 0xE131, 0xF65F, 0x7DE8, + 0x373E, 0xBC89, 0xABE7, 0x2050, 0x853B, 0x0E8C, 0x19E2, 0x9255, + 0x8C4E, 0x07F9, 0x1097, 0x9B20, 0x3E4B, 0xB5FC, 0xA292, 0x2925, + 0x63F3, 0xE844, 0xFF2A, 0x749D, 0xD1F6, 0x5A41, 0x4D2F, 0xC698, + 0x7119, 0xFAAE, 0xEDC0, 0x6677, 0xC31C, 0x48AB, 0x5FC5, 0xD472, + 0x9EA4, 0x1513, 0x027D, 0x89CA, 0x2CA1, 0xA716, 0xB078, 0x3BCF, + 0x25D4, 0xAE63, 0xB90D, 0x32BA, 0x97D1, 0x1C66, 0x0B08, 0x80BF, + 0xCA69, 0x41DE, 0x56B0, 0xDD07, 0x786C, 0xF3DB, 0xE4B5, 0x6F02, + 0x3AB1, 0xB106, 0xA668, 0x2DDF, 0x88B4, 0x0303, 0x146D, 0x9FDA, + 0xD50C, 0x5EBB, 0x49D5, 0xC262, 0x6709, 0xECBE, 0xFBD0, 0x7067, + 0x6E7C, 0xE5CB, 0xF2A5, 0x7912, 0xDC79, 0x57CE, 0x40A0, 0xCB17, + 0x81C1, 0x0A76, 0x1D18, 0x96AF, 0x33C4, 0xB873, 0xAF1D, 0x24AA, + 0x932B, 0x189C, 0x0FF2, 0x8445, 0x212E, 0xAA99, 0xBDF7, 0x3640, + 0x7C96, 0xF721, 0xE04F, 0x6BF8, 0xCE93, 0x4524, 0x524A, 0xD9FD, + 0xC7E6, 0x4C51, 0x5B3F, 0xD088, 0x75E3, 0xFE54, 0xE93A, 0x628D, + 0x285B, 0xA3EC, 0xB482, 0x3F35, 0x9A5E, 0x11E9, 0x0687, 0x8D30, + 0xE232, 0x6985, 0x7EEB, 0xF55C, 0x5037, 0xDB80, 0xCCEE, 0x4759, + 0x0D8F, 0x8638, 0x9156, 0x1AE1, 0xBF8A, 0x343D, 0x2353, 0xA8E4, + 0xB6FF, 0x3D48, 0x2A26, 0xA191, 0x04FA, 0x8F4D, 0x9823, 0x1394, + 0x5942, 0xD2F5, 0xC59B, 0x4E2C, 0xEB47, 0x60F0, 0x779E, 0xFC29, + 0x4BA8, 0xC01F, 0xD771, 0x5CC6, 0xF9AD, 0x721A, 0x6574, 0xEEC3, + 0xA415, 0x2FA2, 0x38CC, 0xB37B, 0x1610, 0x9DA7, 0x8AC9, 0x017E, + 0x1F65, 0x94D2, 0x83BC, 0x080B, 0xAD60, 0x26D7, 0x31B9, 0xBA0E, + 0xF0D8, 0x7B6F, 0x6C01, 0xE7B6, 0x42DD, 0xC96A, 0xDE04, 0x55B3 +}; __u16 crc_t10dif(const unsigned char *buffer, size_t len) { - struct { - struct shash_desc shash; - char ctx[2]; - } desc; - int err; - - desc.shash.tfm = crct10dif_tfm; - desc.shash.flags = 0; - *(__u16 *)desc.ctx = 0; + __u16 crc = 0; + unsigned int i; - err = crypto_shash_update(&desc.shash, buffer, len); - BUG_ON(err); + for (i = 0 ; i < len ; i++) + crc = (crc << 8) ^ t10_dif_crc_table[((crc >> 8) ^ buffer[i]) & 0xff]; - return *(__u16 *)desc.ctx; + return crc; } EXPORT_SYMBOL(crc_t10dif); -static int __init crc_t10dif_mod_init(void) -{ - crct10dif_tfm = crypto_alloc_shash("crct10dif", 0, 0); - return PTR_RET(crct10dif_tfm); -} - -static void __exit crc_t10dif_mod_fini(void) -{ - crypto_free_shash(crct10dif_tfm); -} - -module_init(crc_t10dif_mod_init); -module_exit(crc_t10dif_mod_fini); - MODULE_DESCRIPTION("T10 DIF CRC calculation"); MODULE_LICENSE("GPL"); diff --git a/lib/mpi/longlong.h b/lib/mpi/longlong.h index d411355f238e..aac511417ad1 100644 --- a/lib/mpi/longlong.h +++ b/lib/mpi/longlong.h @@ -151,15 +151,12 @@ do { \ #endif /* __a29k__ */ #if defined(__alpha) && W_TYPE_SIZE == 64 -#define umul_ppmm(ph, pl, m0, m1) \ -do { \ - UDItype __m0 = (m0), __m1 = (m1); \ - __asm__ ("umulh %r1,%2,%0" \ - : "=r" ((UDItype) ph) \ - : "%rJ" (__m0), \ - "rI" (__m1)); \ - (pl) = __m0 * __m1; \ - } while (0) +#define umul_ppmm(ph, pl, m0, m1) \ +do { \ + UDItype __m0 = (m0), __m1 = (m1); \ + (ph) = __builtin_alpha_umulh(__m0, __m1); \ + (pl) = __m0 * __m1; \ +} while (0) #define UMUL_TIME 46 #ifndef LONGLONG_STANDALONE #define udiv_qrnnd(q, r, n1, n0, d) \ @@ -167,7 +164,7 @@ do { UDItype __r; \ (q) = __udiv_qrnnd(&__r, (n1), (n0), (d)); \ (r) = __r; \ } while (0) -extern UDItype __udiv_qrnnd(); +extern UDItype __udiv_qrnnd(UDItype *, UDItype, UDItype, UDItype); #define UDIV_TIME 220 #endif /* LONGLONG_STANDALONE */ #endif /* __alpha */ |