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-rw-r--r--arch/arm/Kconfig3
-rw-r--r--arch/arm/include/asm/mach/pci.h6
-rw-r--r--arch/arm/include/asm/pci.h7
-rw-r--r--arch/arm/kernel/bios32.c3
-rw-r--r--arch/arm/mach-cns3xxx/pcie.c40
-rw-r--r--arch/arm64/kernel/pci.c22
-rw-r--r--drivers/pci/host/pci-keystone.c4
-rw-r--r--drivers/pci/host/pci-layerscape.c1
-rw-r--r--drivers/pci/host/pci-mvebu.c15
-rw-r--r--drivers/pci/host/pci-tegra.c13
-rw-r--r--drivers/pci/host/pci-xgene.c2
-rw-r--r--drivers/pci/host/pcie-designware.c3
-rw-r--r--drivers/pci/host/pcie-rcar.c7
-rw-r--r--drivers/pci/host/pcie-xilinx.c4
-rw-r--r--drivers/pci/hotplug/cpci_hotplug_core.c3
-rw-r--r--drivers/pci/hotplug/pciehp_ctrl.c2
-rw-r--r--drivers/pci/pci-driver.c2
-rw-r--r--drivers/pci/pci.c91
-rw-r--r--drivers/pci/quirks.c78
-rw-r--r--drivers/pci/rom.c7
-rw-r--r--include/linux/pci.h4
21 files changed, 203 insertions, 114 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 97d07ed60a0b..dcb2e0c55be4 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1279,6 +1279,9 @@ config PCI_DOMAINS
bool
depends on PCI
+config PCI_DOMAINS_GENERIC
+ def_bool PCI_DOMAINS
+
config PCI_NANOENGINE
bool "BSE nanoEngine PCI support"
depends on SA1100_NANOENGINE
diff --git a/arch/arm/include/asm/mach/pci.h b/arch/arm/include/asm/mach/pci.h
index 8292b5f81e23..28b9bb35949e 100644
--- a/arch/arm/include/asm/mach/pci.h
+++ b/arch/arm/include/asm/mach/pci.h
@@ -19,9 +19,6 @@ struct pci_bus;
struct device;
struct hw_pci {
-#ifdef CONFIG_PCI_DOMAINS
- int domain;
-#endif
#ifdef CONFIG_PCI_MSI
struct msi_controller *msi_ctrl;
#endif
@@ -45,9 +42,6 @@ struct hw_pci {
* Per-controller structure
*/
struct pci_sys_data {
-#ifdef CONFIG_PCI_DOMAINS
- int domain;
-#endif
#ifdef CONFIG_PCI_MSI
struct msi_controller *msi_ctrl;
#endif
diff --git a/arch/arm/include/asm/pci.h b/arch/arm/include/asm/pci.h
index 7e95d8535e24..585dc33a7a24 100644
--- a/arch/arm/include/asm/pci.h
+++ b/arch/arm/include/asm/pci.h
@@ -18,13 +18,6 @@ static inline int pcibios_assign_all_busses(void)
}
#ifdef CONFIG_PCI_DOMAINS
-static inline int pci_domain_nr(struct pci_bus *bus)
-{
- struct pci_sys_data *root = bus->sysdata;
-
- return root->domain;
-}
-
static inline int pci_proc_domain(struct pci_bus *bus)
{
return pci_domain_nr(bus);
diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c
index a4effd6d8f2f..ddd75c58b1e8 100644
--- a/arch/arm/kernel/bios32.c
+++ b/arch/arm/kernel/bios32.c
@@ -463,9 +463,6 @@ static void pcibios_init_hw(struct device *parent, struct hw_pci *hw,
if (!sys)
panic("PCI: unable to allocate sys data!");
-#ifdef CONFIG_PCI_DOMAINS
- sys->domain = hw->domain;
-#endif
#ifdef CONFIG_PCI_MSI
sys->msi_ctrl = hw->msi_ctrl;
#endif
diff --git a/arch/arm/mach-cns3xxx/pcie.c b/arch/arm/mach-cns3xxx/pcie.c
index 85fc72e875d2..c622c306c390 100644
--- a/arch/arm/mach-cns3xxx/pcie.c
+++ b/arch/arm/mach-cns3xxx/pcie.c
@@ -30,18 +30,15 @@ struct cns3xxx_pcie {
unsigned int irqs[2];
struct resource res_io;
struct resource res_mem;
- struct hw_pci hw_pci;
-
+ int port;
bool linked;
};
-static struct cns3xxx_pcie cns3xxx_pcie[]; /* forward decl. */
-
static struct cns3xxx_pcie *sysdata_to_cnspci(void *sysdata)
{
struct pci_sys_data *root = sysdata;
- return &cns3xxx_pcie[root->domain];
+ return root->private_data;
}
static struct cns3xxx_pcie *pdev_to_cnspci(const struct pci_dev *dev)
@@ -160,13 +157,7 @@ static struct cns3xxx_pcie cns3xxx_pcie[] = {
.flags = IORESOURCE_MEM,
},
.irqs = { IRQ_CNS3XXX_PCIE0_RC, IRQ_CNS3XXX_PCIE0_DEVICE, },
- .hw_pci = {
- .domain = 0,
- .nr_controllers = 1,
- .ops = &cns3xxx_pcie_ops,
- .setup = cns3xxx_pci_setup,
- .map_irq = cns3xxx_pcie_map_irq,
- },
+ .port = 0,
},
[1] = {
.host_regs = (void __iomem *)CNS3XXX_PCIE1_HOST_BASE_VIRT,
@@ -185,19 +176,13 @@ static struct cns3xxx_pcie cns3xxx_pcie[] = {
.flags = IORESOURCE_MEM,
},
.irqs = { IRQ_CNS3XXX_PCIE1_RC, IRQ_CNS3XXX_PCIE1_DEVICE, },
- .hw_pci = {
- .domain = 1,
- .nr_controllers = 1,
- .ops = &cns3xxx_pcie_ops,
- .setup = cns3xxx_pci_setup,
- .map_irq = cns3xxx_pcie_map_irq,
- },
+ .port = 1,
},
};
static void __init cns3xxx_pcie_check_link(struct cns3xxx_pcie *cnspci)
{
- int port = cnspci->hw_pci.domain;
+ int port = cnspci->port;
u32 reg;
unsigned long time;
@@ -228,9 +213,9 @@ static void __init cns3xxx_pcie_check_link(struct cns3xxx_pcie *cnspci)
static void __init cns3xxx_pcie_hw_init(struct cns3xxx_pcie *cnspci)
{
- int port = cnspci->hw_pci.domain;
+ int port = cnspci->port;
struct pci_sys_data sd = {
- .domain = port,
+ .private_data = cnspci,
};
struct pci_bus bus = {
.number = 0,
@@ -291,6 +276,14 @@ static int cns3xxx_pcie_abort_handler(unsigned long addr, unsigned int fsr,
void __init cns3xxx_pcie_init_late(void)
{
int i;
+ void *private_data;
+ struct hw_pci hw_pci = {
+ .nr_controllers = 1,
+ .ops = &cns3xxx_pcie_ops,
+ .setup = cns3xxx_pci_setup,
+ .map_irq = cns3xxx_pcie_map_irq,
+ .private_data = &private_data,
+ };
pcibios_min_io = 0;
pcibios_min_mem = 0;
@@ -303,7 +296,8 @@ void __init cns3xxx_pcie_init_late(void)
cns3xxx_pwr_soft_rst(0x1 << PM_SOFT_RST_REG_OFFST_PCIE(i));
cns3xxx_pcie_check_link(&cns3xxx_pcie[i]);
cns3xxx_pcie_hw_init(&cns3xxx_pcie[i]);
- pci_common_init(&cns3xxx_pcie[i].hw_pci);
+ private_data = &cns3xxx_pcie[i];
+ pci_common_init(&hw_pci);
}
pci_assign_unassigned_resources();
diff --git a/arch/arm64/kernel/pci.c b/arch/arm64/kernel/pci.c
index ce5836c14ec1..6f93c24ca801 100644
--- a/arch/arm64/kernel/pci.c
+++ b/arch/arm64/kernel/pci.c
@@ -46,25 +46,3 @@ int pcibios_add_device(struct pci_dev *dev)
return 0;
}
-
-
-#ifdef CONFIG_PCI_DOMAINS_GENERIC
-static bool dt_domain_found = false;
-
-void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent)
-{
- int domain = of_get_pci_domain_nr(parent->of_node);
-
- if (domain >= 0) {
- dt_domain_found = true;
- } else if (dt_domain_found == true) {
- dev_err(parent, "Node %s is missing \"linux,pci-domain\" property in DT\n",
- parent->of_node->full_name);
- return;
- } else {
- domain = pci_get_new_domain_nr();
- }
-
- bus->domain_nr = domain;
-}
-#endif
diff --git a/drivers/pci/host/pci-keystone.c b/drivers/pci/host/pci-keystone.c
index 78f79e31ac5c..75333b0c4f0a 100644
--- a/drivers/pci/host/pci-keystone.c
+++ b/drivers/pci/host/pci-keystone.c
@@ -119,7 +119,7 @@ static void ks_pcie_msi_irq_handler(unsigned int irq, struct irq_desc *desc)
struct pcie_port *pp = &ks_pcie->pp;
struct irq_chip *chip = irq_desc_get_chip(desc);
- dev_dbg(pp->dev, "ks_pci_msi_irq_handler, irq %d\n", irq);
+ dev_dbg(pp->dev, "%s, irq %d\n", __func__, irq);
/*
* The chained irq handler installation would have replaced normal
@@ -197,7 +197,7 @@ static int ks_pcie_get_irq_controller_info(struct keystone_pcie *ks_pcie,
*/
for (temp = 0; temp < max_host_irqs; temp++) {
host_irqs[temp] = irq_of_parse_and_map(*np_temp, temp);
- if (host_irqs[temp] < 0)
+ if (!host_irqs[temp])
break;
}
if (temp) {
diff --git a/drivers/pci/host/pci-layerscape.c b/drivers/pci/host/pci-layerscape.c
index 6697b1a4d4fa..68c9e5e9b0a8 100644
--- a/drivers/pci/host/pci-layerscape.c
+++ b/drivers/pci/host/pci-layerscape.c
@@ -167,7 +167,6 @@ MODULE_DEVICE_TABLE(of, ls_pcie_of_match);
static struct platform_driver ls_pcie_driver = {
.driver = {
.name = "layerscape-pcie",
- .owner = THIS_MODULE,
.of_match_table = ls_pcie_of_match,
},
};
diff --git a/drivers/pci/host/pci-mvebu.c b/drivers/pci/host/pci-mvebu.c
index 1dd759596b0a..1309cfbaa719 100644
--- a/drivers/pci/host/pci-mvebu.c
+++ b/drivers/pci/host/pci-mvebu.c
@@ -101,9 +101,7 @@ struct mvebu_pcie {
struct mvebu_pcie_port *ports;
struct msi_controller *msi;
struct resource io;
- char io_name[30];
struct resource realio;
- char mem_name[30];
struct resource mem;
struct resource busn;
int nports;
@@ -723,18 +721,9 @@ static int mvebu_pcie_setup(int nr, struct pci_sys_data *sys)
{
struct mvebu_pcie *pcie = sys_to_pcie(sys);
int i;
- int domain = 0;
-#ifdef CONFIG_PCI_DOMAINS
- domain = sys->domain;
-#endif
-
- snprintf(pcie->mem_name, sizeof(pcie->mem_name), "PCI MEM %04x",
- domain);
- pcie->mem.name = pcie->mem_name;
-
- snprintf(pcie->io_name, sizeof(pcie->io_name), "PCI I/O %04x", domain);
- pcie->realio.name = pcie->io_name;
+ pcie->mem.name = "PCI MEM";
+ pcie->realio.name = "PCI I/O";
if (request_resource(&iomem_resource, &pcie->mem))
return 0;
diff --git a/drivers/pci/host/pci-tegra.c b/drivers/pci/host/pci-tegra.c
index 44fd31b9fa2d..00e92720d7f7 100644
--- a/drivers/pci/host/pci-tegra.c
+++ b/drivers/pci/host/pci-tegra.c
@@ -576,19 +576,6 @@ static void tegra_pcie_port_free(struct tegra_pcie_port *port)
devm_kfree(pcie->dev, port);
}
-static void tegra_pcie_fixup_bridge(struct pci_dev *dev)
-{
- u16 reg;
-
- if ((dev->class >> 16) == PCI_BASE_CLASS_BRIDGE) {
- pci_read_config_word(dev, PCI_COMMAND, &reg);
- reg |= (PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
- PCI_COMMAND_MASTER | PCI_COMMAND_SERR);
- pci_write_config_word(dev, PCI_COMMAND, reg);
- }
-}
-DECLARE_PCI_FIXUP_FINAL(PCI_ANY_ID, PCI_ANY_ID, tegra_pcie_fixup_bridge);
-
/* Tegra PCIE root complex wrongly reports device class */
static void tegra_pcie_fixup_class(struct pci_dev *dev)
{
diff --git a/drivers/pci/host/pci-xgene.c b/drivers/pci/host/pci-xgene.c
index ee6a3d3105d8..e77d831dc241 100644
--- a/drivers/pci/host/pci-xgene.c
+++ b/drivers/pci/host/pci-xgene.c
@@ -16,7 +16,7 @@
* GNU General Public License for more details.
*
*/
-#include <linux/clk-private.h>
+#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/jiffies.h>
diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-designware.c
index df781cdf13c1..eef311115899 100644
--- a/drivers/pci/host/pcie-designware.c
+++ b/drivers/pci/host/pcie-designware.c
@@ -508,9 +508,6 @@ int __init dw_pcie_host_init(struct pcie_port *pp)
dw_pci.private_data = (void **)&pp;
pci_common_init_dev(pp->dev, &dw_pci);
-#ifdef CONFIG_PCI_DOMAINS
- dw_pci.domain++;
-#endif
return 0;
}
diff --git a/drivers/pci/host/pcie-rcar.c b/drivers/pci/host/pcie-rcar.c
index 748786c402fc..c57bd0ac39a0 100644
--- a/drivers/pci/host/pcie-rcar.c
+++ b/drivers/pci/host/pcie-rcar.c
@@ -397,9 +397,6 @@ static void rcar_pcie_enable(struct rcar_pcie *pcie)
#endif
pci_common_init_dev(&pdev->dev, &rcar_pci);
-#ifdef CONFIG_PCI_DOMAINS
- rcar_pci.domain++;
-#endif
}
static int phy_wait_for_ack(struct rcar_pcie *pcie)
@@ -757,7 +754,7 @@ static int rcar_pcie_get_resources(struct platform_device *pdev,
goto err_map_reg;
i = irq_of_parse_and_map(pdev->dev.of_node, 0);
- if (i < 0) {
+ if (!i) {
dev_err(pcie->dev, "cannot get platform resources for msi interrupt\n");
err = -ENOENT;
goto err_map_reg;
@@ -765,7 +762,7 @@ static int rcar_pcie_get_resources(struct platform_device *pdev,
pcie->msi.irq1 = i;
i = irq_of_parse_and_map(pdev->dev.of_node, 1);
- if (i < 0) {
+ if (!i) {
dev_err(pcie->dev, "cannot get platform resources for msi interrupt\n");
err = -ENOENT;
goto err_map_reg;
diff --git a/drivers/pci/host/pcie-xilinx.c b/drivers/pci/host/pcie-xilinx.c
index f67d0363e3c9..eac4a4b957ca 100644
--- a/drivers/pci/host/pcie-xilinx.c
+++ b/drivers/pci/host/pcie-xilinx.c
@@ -148,10 +148,10 @@ static inline bool xilinx_pcie_link_is_up(struct xilinx_pcie_port *port)
*/
static void xilinx_pcie_clear_err_interrupts(struct xilinx_pcie_port *port)
{
- u32 val = pcie_read(port, XILINX_PCIE_REG_RPEFR);
+ unsigned long val = pcie_read(port, XILINX_PCIE_REG_RPEFR);
if (val & XILINX_PCIE_RPEFR_ERR_VALID) {
- dev_dbg(port->dev, "Requester ID %d\n",
+ dev_dbg(port->dev, "Requester ID %lu\n",
val & XILINX_PCIE_RPEFR_REQ_ID);
pcie_write(port, XILINX_PCIE_RPEFR_ALL_MASK,
XILINX_PCIE_REG_RPEFR);
diff --git a/drivers/pci/hotplug/cpci_hotplug_core.c b/drivers/pci/hotplug/cpci_hotplug_core.c
index a5a7fd8332ac..46db29395a62 100644
--- a/drivers/pci/hotplug/cpci_hotplug_core.c
+++ b/drivers/pci/hotplug/cpci_hotplug_core.c
@@ -214,8 +214,7 @@ static void release_slot(struct hotplug_slot *hotplug_slot)
kfree(slot->hotplug_slot->info);
kfree(slot->hotplug_slot);
- if (slot->dev)
- pci_dev_put(slot->dev);
+ pci_dev_put(slot->dev);
kfree(slot);
}
diff --git a/drivers/pci/hotplug/pciehp_ctrl.c b/drivers/pci/hotplug/pciehp_ctrl.c
index ff32e85e1de6..f052e951b23e 100644
--- a/drivers/pci/hotplug/pciehp_ctrl.c
+++ b/drivers/pci/hotplug/pciehp_ctrl.c
@@ -532,8 +532,6 @@ static void interrupt_event_handler(struct work_struct *work)
pciehp_green_led_off(p_slot);
break;
case INT_PRESENCE_ON:
- if (!HP_SUPR_RM(ctrl))
- break;
ctrl_dbg(ctrl, "Surprise Insertion\n");
handle_surprise_event(p_slot);
break;
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 887e6bd95af7..09a66bad8018 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -1383,7 +1383,7 @@ static int pci_uevent(struct device *dev, struct kobj_uevent_env *env)
if (add_uevent_var(env, "PCI_SLOT_NAME=%s", pci_name(pdev)))
return -ENOMEM;
- if (add_uevent_var(env, "MODALIAS=pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02x",
+ if (add_uevent_var(env, "MODALIAS=pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02X",
pdev->vendor, pdev->device,
pdev->subsystem_vendor, pdev->subsystem_device,
(u8)(pdev->class >> 16), (u8)(pdev->class >> 8),
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index cab05f31223f..460d046ab6fe 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -10,6 +10,8 @@
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/init.h>
+#include <linux/of.h>
+#include <linux/of_pci.h>
#include <linux/pci.h>
#include <linux/pm.h>
#include <linux/slab.h>
@@ -3197,7 +3199,7 @@ static int pci_pm_reset(struct pci_dev *dev, int probe)
{
u16 csr;
- if (!dev->pm_cap)
+ if (!dev->pm_cap || dev->dev_flags & PCI_DEV_FLAGS_NO_PM_RESET)
return -ENOTTY;
pci_read_config_word(dev, dev->pm_cap + PCI_PM_CTRL, &csr);
@@ -3271,7 +3273,8 @@ static int pci_parent_bus_reset(struct pci_dev *dev, int probe)
{
struct pci_dev *pdev;
- if (pci_is_root_bus(dev->bus) || dev->subordinate || !dev->bus->self)
+ if (pci_is_root_bus(dev->bus) || dev->subordinate ||
+ !dev->bus->self || dev->dev_flags & PCI_DEV_FLAGS_NO_BUS_RESET)
return -ENOTTY;
list_for_each_entry(pdev, &dev->bus->devices, bus_list)
@@ -3305,7 +3308,8 @@ static int pci_dev_reset_slot_function(struct pci_dev *dev, int probe)
{
struct pci_dev *pdev;
- if (dev->subordinate || !dev->slot)
+ if (dev->subordinate || !dev->slot ||
+ dev->dev_flags & PCI_DEV_FLAGS_NO_BUS_RESET)
return -ENOTTY;
list_for_each_entry(pdev, &dev->bus->devices, bus_list)
@@ -3557,6 +3561,20 @@ int pci_try_reset_function(struct pci_dev *dev)
}
EXPORT_SYMBOL_GPL(pci_try_reset_function);
+/* Do any devices on or below this bus prevent a bus reset? */
+static bool pci_bus_resetable(struct pci_bus *bus)
+{
+ struct pci_dev *dev;
+
+ list_for_each_entry(dev, &bus->devices, bus_list) {
+ if (dev->dev_flags & PCI_DEV_FLAGS_NO_BUS_RESET ||
+ (dev->subordinate && !pci_bus_resetable(dev->subordinate)))
+ return false;
+ }
+
+ return true;
+}
+
/* Lock devices from the top of the tree down */
static void pci_bus_lock(struct pci_bus *bus)
{
@@ -3607,6 +3625,22 @@ unlock:
return 0;
}
+/* Do any devices on or below this slot prevent a bus reset? */
+static bool pci_slot_resetable(struct pci_slot *slot)
+{
+ struct pci_dev *dev;
+
+ list_for_each_entry(dev, &slot->bus->devices, bus_list) {
+ if (!dev->slot || dev->slot != slot)
+ continue;
+ if (dev->dev_flags & PCI_DEV_FLAGS_NO_BUS_RESET ||
+ (dev->subordinate && !pci_bus_resetable(dev->subordinate)))
+ return false;
+ }
+
+ return true;
+}
+
/* Lock devices from the top of the tree down */
static void pci_slot_lock(struct pci_slot *slot)
{
@@ -3728,7 +3762,7 @@ static int pci_slot_reset(struct pci_slot *slot, int probe)
{
int rc;
- if (!slot)
+ if (!slot || !pci_slot_resetable(slot))
return -ENOTTY;
if (!probe)
@@ -3820,7 +3854,7 @@ EXPORT_SYMBOL_GPL(pci_try_reset_slot);
static int pci_bus_reset(struct pci_bus *bus, int probe)
{
- if (!bus->self)
+ if (!bus->self || !pci_bus_resetable(bus))
return -ENOTTY;
if (probe)
@@ -4439,6 +4473,53 @@ int pci_get_new_domain_nr(void)
{
return atomic_inc_return(&__domain_nr);
}
+
+#ifdef CONFIG_PCI_DOMAINS_GENERIC
+void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent)
+{
+ static int use_dt_domains = -1;
+ int domain = of_get_pci_domain_nr(parent->of_node);
+
+ /*
+ * Check DT domain and use_dt_domains values.
+ *
+ * If DT domain property is valid (domain >= 0) and
+ * use_dt_domains != 0, the DT assignment is valid since this means
+ * we have not previously allocated a domain number by using
+ * pci_get_new_domain_nr(); we should also update use_dt_domains to
+ * 1, to indicate that we have just assigned a domain number from
+ * DT.
+ *
+ * If DT domain property value is not valid (ie domain < 0), and we
+ * have not previously assigned a domain number from DT
+ * (use_dt_domains != 1) we should assign a domain number by
+ * using the:
+ *
+ * pci_get_new_domain_nr()
+ *
+ * API and update the use_dt_domains value to keep track of method we
+ * are using to assign domain numbers (use_dt_domains = 0).
+ *
+ * All other combinations imply we have a platform that is trying
+ * to mix domain numbers obtained from DT and pci_get_new_domain_nr(),
+ * which is a recipe for domain mishandling and it is prevented by
+ * invalidating the domain value (domain = -1) and printing a
+ * corresponding error.
+ */
+ if (domain >= 0 && use_dt_domains) {
+ use_dt_domains = 1;
+ } else if (domain < 0 && use_dt_domains != 1) {
+ use_dt_domains = 0;
+ domain = pci_get_new_domain_nr();
+ } else {
+ dev_err(parent, "Node %s has inconsistent \"linux,pci-domain\" property in DT\n",
+ parent->of_node->full_name);
+ domain = -1;
+ }
+
+ bus->domain_nr = domain;
+}
+#endif
#endif
/**
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index ed6f89b6efe5..e248a119f15a 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -3028,6 +3028,41 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_REALTEK, 0x8169,
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MELLANOX, PCI_ANY_ID,
quirk_broken_intx_masking);
+static void quirk_no_bus_reset(struct pci_dev *dev)
+{
+ dev->dev_flags |= PCI_DEV_FLAGS_NO_BUS_RESET;
+}
+
+/*
+ * Atheros AR93xx chips do not behave after a bus reset. The device will
+ * throw a Link Down error on AER-capable systems and regardless of AER,
+ * config space of the device is never accessible again and typically
+ * causes the system to hang or reset when access is attempted.
+ * http://www.spinics.net/lists/linux-pci/msg34797.html
+ */
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATHEROS, 0x0030, quirk_no_bus_reset);
+
+static void quirk_no_pm_reset(struct pci_dev *dev)
+{
+ /*
+ * We can't do a bus reset on root bus devices, but an ineffective
+ * PM reset may be better than nothing.
+ */
+ if (!pci_is_root_bus(dev->bus))
+ dev->dev_flags |= PCI_DEV_FLAGS_NO_PM_RESET;
+}
+
+/*
+ * Some AMD/ATI GPUS (HD8570 - Oland) report that a D3hot->D0 transition
+ * causes a reset (i.e., they advertise NoSoftRst-). This transition seems
+ * to have no effect on the device: it retains the framebuffer contents and
+ * monitor sync. Advertising this support makes other layers, like VFIO,
+ * assume pci_reset_function() is viable for this device. Mark it as
+ * unavailable to skip it when testing reset methods.
+ */
+DECLARE_PCI_FIXUP_CLASS_HEADER(PCI_VENDOR_ID_ATI, PCI_ANY_ID,
+ PCI_CLASS_DISPLAY_VGA, 8, quirk_no_pm_reset);
+
#ifdef CONFIG_ACPI
/*
* Apple: Shutdown Cactus Ridge Thunderbolt controller.
@@ -3528,6 +3563,44 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_JMICRON,
quirk_dma_func1_alias);
/*
+ * Some devices DMA with the wrong devfn, not just the wrong function.
+ * quirk_fixed_dma_alias() uses this table to create fixed aliases, where
+ * the alias is "fixed" and independent of the device devfn.
+ *
+ * For example, the Adaptec 3405 is a PCIe card with an Intel 80333 I/O
+ * processor. To software, this appears as a PCIe-to-PCI/X bridge with a
+ * single device on the secondary bus. In reality, the single exposed
+ * device at 0e.0 is the Address Translation Unit (ATU) of the controller
+ * that provides a bridge to the internal bus of the I/O processor. The
+ * controller supports private devices, which can be hidden from PCI config
+ * space. In the case of the Adaptec 3405, a private device at 01.0
+ * appears to be the DMA engine, which therefore needs to become a DMA
+ * alias for the device.
+ */
+static const struct pci_device_id fixed_dma_alias_tbl[] = {
+ { PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x0285,
+ PCI_VENDOR_ID_ADAPTEC2, 0x02bb), /* Adaptec 3405 */
+ .driver_data = PCI_DEVFN(1, 0) },
+ { 0 }
+};
+
+static void quirk_fixed_dma_alias(struct pci_dev *dev)
+{
+ const struct pci_device_id *id;
+
+ id = pci_match_id(fixed_dma_alias_tbl, dev);
+ if (id) {
+ dev->dma_alias_devfn = id->driver_data;
+ dev->dev_flags |= PCI_DEV_FLAGS_DMA_ALIAS_DEVFN;
+ dev_info(&dev->dev, "Enabling fixed DMA alias to %02x.%d\n",
+ PCI_SLOT(dev->dma_alias_devfn),
+ PCI_FUNC(dev->dma_alias_devfn));
+ }
+}
+
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ADAPTEC2, 0x0285, quirk_fixed_dma_alias);
+
+/*
* A few PCIe-to-PCI bridges fail to expose a PCIe capability, resulting in
* using the wrong DMA alias for the device. Some of these devices can be
* used as either forward or reverse bridges, so we need to test whether the
@@ -3630,6 +3703,9 @@ static const u16 pci_quirk_intel_pch_acs_ids[] = {
0x9c98, 0x9c99, 0x9c9a, 0x9c9b,
/* Patsburg (X79) PCH */
0x1d10, 0x1d12, 0x1d14, 0x1d16, 0x1d18, 0x1d1a, 0x1d1c, 0x1d1e,
+ /* Wellsburg (X99) PCH */
+ 0x8d10, 0x8d11, 0x8d12, 0x8d13, 0x8d14, 0x8d15, 0x8d16, 0x8d17,
+ 0x8d18, 0x8d19, 0x8d1a, 0x8d1b, 0x8d1c, 0x8d1d, 0x8d1e,
};
static bool pci_quirk_intel_pch_acs_match(struct pci_dev *dev)
@@ -3713,6 +3789,8 @@ static const struct pci_dev_acs_enabled {
{ PCI_VENDOR_ID_INTEL, 0x1551, pci_quirk_mf_endpoint_acs },
{ PCI_VENDOR_ID_INTEL, 0x1558, pci_quirk_mf_endpoint_acs },
{ PCI_VENDOR_ID_INTEL, PCI_ANY_ID, pci_quirk_intel_pch_acs },
+ { 0x19a2, 0x710, pci_quirk_mf_endpoint_acs }, /* Emulex BE3-R */
+ { 0x10df, 0x720, pci_quirk_mf_endpoint_acs }, /* Emulex Skyhawk-R */
{ 0 }
};
diff --git a/drivers/pci/rom.c b/drivers/pci/rom.c
index f955edb9bea7..eb0ad530dc43 100644
--- a/drivers/pci/rom.c
+++ b/drivers/pci/rom.c
@@ -71,6 +71,7 @@ size_t pci_get_rom_size(struct pci_dev *pdev, void __iomem *rom, size_t size)
{
void __iomem *image;
int last_image;
+ unsigned length;
image = rom;
do {
@@ -93,9 +94,9 @@ size_t pci_get_rom_size(struct pci_dev *pdev, void __iomem *rom, size_t size)
if (readb(pds + 3) != 'R')
break;
last_image = readb(pds + 21) & 0x80;
- /* this length is reliable */
- image += readw(pds + 16) * 512;
- } while (!last_image);
+ length = readw(pds + 16);
+ image += length * 512;
+ } while (length && !last_image);
/* never return a size larger than the PCI resource window */
/* there are known ROMs that get the size wrong */
diff --git a/include/linux/pci.h b/include/linux/pci.h
index e7fd51900182..10028a94eeb3 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -175,6 +175,10 @@ enum pci_dev_flags {
PCI_DEV_FLAGS_DMA_ALIAS_DEVFN = (__force pci_dev_flags_t) (1 << 4),
/* Use a PCIe-to-PCI bridge alias even if !pci_is_pcie */
PCI_DEV_FLAG_PCIE_BRIDGE_ALIAS = (__force pci_dev_flags_t) (1 << 5),
+ /* Do not use bus resets for device */
+ PCI_DEV_FLAGS_NO_BUS_RESET = (__force pci_dev_flags_t) (1 << 6),
+ /* Do not use PM reset even if device advertises NoSoftRst- */
+ PCI_DEV_FLAGS_NO_PM_RESET = (__force pci_dev_flags_t) (1 << 7),
};
enum pci_irq_reroute_variant {
generated by cgit v1.2.3 (git 2.0.4) at 2024-10-05 20:39:27 +0000