From 1f82de10d6b1d845155363c895c552e61b36b51a Mon Sep 17 00:00:00 2001 From: Yinghai Lu Date: Thu, 23 Apr 2009 20:48:32 -0700 Subject: PCI/x86: don't assume prefetchable ranges are 64bit We should not assign 64bit ranges to PCI devices that only take 32bit prefetchable addresses. Try to set IORESOURCE_MEM_64 in 64bit resource of pci_device/pci_bridge and make the bus resource only have that bit set when all devices under it support 64bit prefetchable memory. Use that flag to allocate resources from that range. Reported-by: Yannick Reviewed-by: Ivan Kokshaysky Signed-off-by: Yinghai Lu Signed-off-by: Jesse Barnes --- arch/x86/include/asm/pci.h | 1 + 1 file changed, 1 insertion(+) (limited to 'arch') diff --git a/arch/x86/include/asm/pci.h b/arch/x86/include/asm/pci.h index b51a1e8b0baf..927958d13c19 100644 --- a/arch/x86/include/asm/pci.h +++ b/arch/x86/include/asm/pci.h @@ -130,6 +130,7 @@ extern void pci_iommu_alloc(void); /* generic pci stuff */ #include +#define PCIBIOS_MAX_MEM_32 0xffffffff #ifdef CONFIG_NUMA /* Returns the node based on pci bus */ -- cgit v1.2.3 From 9e9f46c44e487af0a82eb61b624553e2f7118f5b Mon Sep 17 00:00:00 2001 From: Jesse Barnes Date: Thu, 11 Jun 2009 10:58:28 -0700 Subject: PCI: use ACPI _CRS data by default At this point, it seems to solve more problems than it causes, so let's try using it by default. It's an easy revert if it ends up causing trouble. Reviewed-by: Yinghai Lu Acked-by: Bjorn Helgaas Signed-off-by: Jesse Barnes --- Documentation/kernel-parameters.txt | 2 +- arch/x86/include/asm/pci_x86.h | 2 +- arch/x86/pci/acpi.c | 2 +- arch/x86/pci/amd_bus.c | 2 +- arch/x86/pci/common.c | 4 ++-- 5 files changed, 6 insertions(+), 6 deletions(-) (limited to 'arch') diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index fd5cac013037..7bdaf5080408 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -1787,7 +1787,7 @@ and is between 256 and 4096 characters. It is defined in the file IRQ routing is enabled. noacpi [X86] Do not use ACPI for IRQ routing or for PCI scanning. - use_crs [X86] Use _CRS for PCI resource + nocrs [X86] Don't use _CRS for PCI resource allocation. routeirq Do IRQ routing for all PCI devices. This is normally done in pci_enable_device(), diff --git a/arch/x86/include/asm/pci_x86.h b/arch/x86/include/asm/pci_x86.h index e60fd3e14bdf..cb739cc0a080 100644 --- a/arch/x86/include/asm/pci_x86.h +++ b/arch/x86/include/asm/pci_x86.h @@ -25,7 +25,7 @@ #define PCI_BIOS_IRQ_SCAN 0x2000 #define PCI_ASSIGN_ALL_BUSSES 0x4000 #define PCI_CAN_SKIP_ISA_ALIGN 0x8000 -#define PCI_USE__CRS 0x10000 +#define PCI_NO_ROOT_CRS 0x10000 #define PCI_CHECK_ENABLE_AMD_MMCONF 0x20000 #define PCI_HAS_IO_ECS 0x40000 #define PCI_NOASSIGN_ROMS 0x80000 diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c index c0ecf250fe51..8d898e0d3609 100644 --- a/arch/x86/pci/acpi.c +++ b/arch/x86/pci/acpi.c @@ -217,7 +217,7 @@ struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_device *device, int do #endif } - if (bus && (pci_probe & PCI_USE__CRS)) + if (bus && !(pci_probe & PCI_NO_ROOT_CRS)) get_current_resources(device, busnum, domain, bus); return bus; } diff --git a/arch/x86/pci/amd_bus.c b/arch/x86/pci/amd_bus.c index f893d6a6e803..2255f880678b 100644 --- a/arch/x86/pci/amd_bus.c +++ b/arch/x86/pci/amd_bus.c @@ -101,7 +101,7 @@ void x86_pci_root_bus_res_quirks(struct pci_bus *b) struct pci_root_info *info; /* don't go for it if _CRS is used */ - if (pci_probe & PCI_USE__CRS) + if (!(pci_probe & PCI_NO_ROOT_CRS)) return; /* if only one root bus, don't need to anything */ diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c index 2202b6257b82..4740119e4bb7 100644 --- a/arch/x86/pci/common.c +++ b/arch/x86/pci/common.c @@ -515,8 +515,8 @@ char * __devinit pcibios_setup(char *str) } else if (!strcmp(str, "assign-busses")) { pci_probe |= PCI_ASSIGN_ALL_BUSSES; return NULL; - } else if (!strcmp(str, "use_crs")) { - pci_probe |= PCI_USE__CRS; + } else if (!strcmp(str, "nocrs")) { + pci_probe |= PCI_NO_ROOT_CRS; return NULL; } else if (!strcmp(str, "earlydump")) { pci_early_dump_regs = 1; -- cgit v1.2.3 From 70298c6e6c1ba68346336b4ea54bd5c0abbf73c8 Mon Sep 17 00:00:00 2001 From: "Zhang, Yanmin" Date: Tue, 16 Jun 2009 13:34:38 +0800 Subject: PCI AER: support Multiple Error Received and no error source id Based on PCI Express AER specs, a root port might receive multiple TLP errors while it could only save a correctable error source id and an uncorrectable error source id at the same time. In addition, some root port hardware might be unable to provide a correct source id, i.e., the source id, or the bus id part of the source id provided by root port might be equal to 0. The patchset implements the support in kernel by searching the device tree under the root port. Patch 1 changes parameter cb of function pci_walk_bus to return a value. When cb return non-zero, pci_walk_bus stops more searching on the device tree. Reviewed-by: Andrew Patterson Signed-off-by: Zhang Yanmin Signed-off-by: Jesse Barnes --- arch/powerpc/platforms/pseries/eeh_driver.c | 38 ++++++++++++++++++----------- drivers/pci/bus.c | 11 +++++++-- drivers/pci/pcie/aer/aerdrv_core.c | 30 ++++++++++++----------- include/linux/pci.h | 2 +- 4 files changed, 50 insertions(+), 31 deletions(-) (limited to 'arch') diff --git a/arch/powerpc/platforms/pseries/eeh_driver.c b/arch/powerpc/platforms/pseries/eeh_driver.c index 9a2a6e32f00f..0e8db6771252 100644 --- a/arch/powerpc/platforms/pseries/eeh_driver.c +++ b/arch/powerpc/platforms/pseries/eeh_driver.c @@ -122,7 +122,7 @@ static void eeh_enable_irq(struct pci_dev *dev) * passed back in "userdata". */ -static void eeh_report_error(struct pci_dev *dev, void *userdata) +static int eeh_report_error(struct pci_dev *dev, void *userdata) { enum pci_ers_result rc, *res = userdata; struct pci_driver *driver = dev->driver; @@ -130,19 +130,21 @@ static void eeh_report_error(struct pci_dev *dev, void *userdata) dev->error_state = pci_channel_io_frozen; if (!driver) - return; + return 0; eeh_disable_irq(dev); if (!driver->err_handler || !driver->err_handler->error_detected) - return; + return 0; rc = driver->err_handler->error_detected (dev, pci_channel_io_frozen); /* A driver that needs a reset trumps all others */ if (rc == PCI_ERS_RESULT_NEED_RESET) *res = rc; if (*res == PCI_ERS_RESULT_NONE) *res = rc; + + return 0; } /** @@ -153,7 +155,7 @@ static void eeh_report_error(struct pci_dev *dev, void *userdata) * Cumulative response passed back in "userdata". */ -static void eeh_report_mmio_enabled(struct pci_dev *dev, void *userdata) +static int eeh_report_mmio_enabled(struct pci_dev *dev, void *userdata) { enum pci_ers_result rc, *res = userdata; struct pci_driver *driver = dev->driver; @@ -161,26 +163,28 @@ static void eeh_report_mmio_enabled(struct pci_dev *dev, void *userdata) if (!driver || !driver->err_handler || !driver->err_handler->mmio_enabled) - return; + return 0; rc = driver->err_handler->mmio_enabled (dev); /* A driver that needs a reset trumps all others */ if (rc == PCI_ERS_RESULT_NEED_RESET) *res = rc; if (*res == PCI_ERS_RESULT_NONE) *res = rc; + + return 0; } /** * eeh_report_reset - tell device that slot has been reset */ -static void eeh_report_reset(struct pci_dev *dev, void *userdata) +static int eeh_report_reset(struct pci_dev *dev, void *userdata) { enum pci_ers_result rc, *res = userdata; struct pci_driver *driver = dev->driver; if (!driver) - return; + return 0; dev->error_state = pci_channel_io_normal; @@ -188,35 +192,39 @@ static void eeh_report_reset(struct pci_dev *dev, void *userdata) if (!driver->err_handler || !driver->err_handler->slot_reset) - return; + return 0; rc = driver->err_handler->slot_reset(dev); if ((*res == PCI_ERS_RESULT_NONE) || (*res == PCI_ERS_RESULT_RECOVERED)) *res = rc; if (*res == PCI_ERS_RESULT_DISCONNECT && rc == PCI_ERS_RESULT_NEED_RESET) *res = rc; + + return 0; } /** * eeh_report_resume - tell device to resume normal operations */ -static void eeh_report_resume(struct pci_dev *dev, void *userdata) +static int eeh_report_resume(struct pci_dev *dev, void *userdata) { struct pci_driver *driver = dev->driver; dev->error_state = pci_channel_io_normal; if (!driver) - return; + return 0; eeh_enable_irq(dev); if (!driver->err_handler || !driver->err_handler->resume) - return; + return 0; driver->err_handler->resume(dev); + + return 0; } /** @@ -226,22 +234,24 @@ static void eeh_report_resume(struct pci_dev *dev, void *userdata) * dead, and that no further recovery attempts will be made on it. */ -static void eeh_report_failure(struct pci_dev *dev, void *userdata) +static int eeh_report_failure(struct pci_dev *dev, void *userdata) { struct pci_driver *driver = dev->driver; dev->error_state = pci_channel_io_perm_failure; if (!driver) - return; + return 0; eeh_disable_irq(dev); if (!driver->err_handler || !driver->err_handler->error_detected) - return; + return 0; driver->err_handler->error_detected(dev, pci_channel_io_perm_failure); + + return 0; } /* ------------------------------------------------------- */ diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c index 40af27f31043..cef28a79103f 100644 --- a/drivers/pci/bus.c +++ b/drivers/pci/bus.c @@ -206,13 +206,18 @@ void pci_enable_bridges(struct pci_bus *bus) * Walk the given bus, including any bridged devices * on buses under this bus. Call the provided callback * on each device found. + * + * We check the return of @cb each time. If it returns anything + * other than 0, we break out. + * */ -void pci_walk_bus(struct pci_bus *top, void (*cb)(struct pci_dev *, void *), +void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *), void *userdata) { struct pci_dev *dev; struct pci_bus *bus; struct list_head *next; + int retval; bus = top; down_read(&pci_bus_sem); @@ -236,8 +241,10 @@ void pci_walk_bus(struct pci_bus *top, void (*cb)(struct pci_dev *, void *), /* Run device routines with the device locked */ down(&dev->dev.sem); - cb(dev, userdata); + retval = cb(dev, userdata); up(&dev->dev.sem); + if (retval) + break; } up_read(&pci_bus_sem); } diff --git a/drivers/pci/pcie/aer/aerdrv_core.c b/drivers/pci/pcie/aer/aerdrv_core.c index dd3829e68e3f..a7a3919904bb 100644 --- a/drivers/pci/pcie/aer/aerdrv_core.c +++ b/drivers/pci/pcie/aer/aerdrv_core.c @@ -109,7 +109,7 @@ int pci_cleanup_aer_correct_error_status(struct pci_dev *dev) #endif /* 0 */ -static void set_device_error_reporting(struct pci_dev *dev, void *data) +static int set_device_error_reporting(struct pci_dev *dev, void *data) { bool enable = *((bool *)data); @@ -124,6 +124,8 @@ static void set_device_error_reporting(struct pci_dev *dev, void *data) if (enable) pcie_set_ecrc_checking(dev); + + return 0; } /** @@ -207,7 +209,7 @@ static struct device* find_source_device(struct pci_dev *parent, u16 id) return NULL; } -static void report_error_detected(struct pci_dev *dev, void *data) +static int report_error_detected(struct pci_dev *dev, void *data) { pci_ers_result_t vote; struct pci_error_handlers *err_handler; @@ -232,16 +234,16 @@ static void report_error_detected(struct pci_dev *dev, void *data) dev->driver ? "no AER-aware driver" : "no driver"); } - return; + return 0; } err_handler = dev->driver->err_handler; vote = err_handler->error_detected(dev, result_data->state); result_data->result = merge_result(result_data->result, vote); - return; + return 0; } -static void report_mmio_enabled(struct pci_dev *dev, void *data) +static int report_mmio_enabled(struct pci_dev *dev, void *data) { pci_ers_result_t vote; struct pci_error_handlers *err_handler; @@ -251,15 +253,15 @@ static void report_mmio_enabled(struct pci_dev *dev, void *data) if (!dev->driver || !dev->driver->err_handler || !dev->driver->err_handler->mmio_enabled) - return; + return 0; err_handler = dev->driver->err_handler; vote = err_handler->mmio_enabled(dev); result_data->result = merge_result(result_data->result, vote); - return; + return 0; } -static void report_slot_reset(struct pci_dev *dev, void *data) +static int report_slot_reset(struct pci_dev *dev, void *data) { pci_ers_result_t vote; struct pci_error_handlers *err_handler; @@ -269,15 +271,15 @@ static void report_slot_reset(struct pci_dev *dev, void *data) if (!dev->driver || !dev->driver->err_handler || !dev->driver->err_handler->slot_reset) - return; + return 0; err_handler = dev->driver->err_handler; vote = err_handler->slot_reset(dev); result_data->result = merge_result(result_data->result, vote); - return; + return 0; } -static void report_resume(struct pci_dev *dev, void *data) +static int report_resume(struct pci_dev *dev, void *data) { struct pci_error_handlers *err_handler; @@ -286,11 +288,11 @@ static void report_resume(struct pci_dev *dev, void *data) if (!dev->driver || !dev->driver->err_handler || !dev->driver->err_handler->resume) - return; + return 0; err_handler = dev->driver->err_handler; err_handler->resume(dev); - return; + return 0; } /** @@ -307,7 +309,7 @@ static void report_resume(struct pci_dev *dev, void *data) static pci_ers_result_t broadcast_error_message(struct pci_dev *dev, enum pci_channel_state state, char *error_mesg, - void (*cb)(struct pci_dev *, void *)) + int (*cb)(struct pci_dev *, void *)) { struct aer_broadcast_data result_data; diff --git a/include/linux/pci.h b/include/linux/pci.h index 6a1800ecd95d..61d9b790d21c 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -789,7 +789,7 @@ const struct pci_device_id *pci_match_id(const struct pci_device_id *ids, int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max, int pass); -void pci_walk_bus(struct pci_bus *top, void (*cb)(struct pci_dev *, void *), +void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *), void *userdata); int pci_cfg_space_size_ext(struct pci_dev *dev); int pci_cfg_space_size(struct pci_dev *dev); -- cgit v1.2.3 From f9cde5ffed17bf74f6bef042d99edb0622f58576 Mon Sep 17 00:00:00 2001 From: Gary Hade Date: Wed, 27 May 2009 12:41:44 -0700 Subject: x86/ACPI: Correct maximum allowed _CRS returned resources and warn if exceeded Issue a warning if _CRS returns too many resource descriptors to be accommodated by the fixed size resource array instances. If there is no transparent bridge on the root bus "too many" is the PCI_BUS_NUM_RESOURCES size of the resource array. Otherwise, the last 3 slots of the resource array must be excluded making the maximum (PCI_BUS_NUM_RESOURCES - 3). The current code: - is silent when _CRS returns too many resource descriptors and - incorrectly allows use of the last 3 slots of the resource array for a root bus with a transparent bridge Signed-off-by: Gary Hade Signed-off-by: Jesse Barnes --- arch/x86/pci/acpi.c | 33 +++++++++++++++++++++++++++------ 1 file changed, 27 insertions(+), 6 deletions(-) (limited to 'arch') diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c index 8d898e0d3609..16c3fda85bba 100644 --- a/arch/x86/pci/acpi.c +++ b/arch/x86/pci/acpi.c @@ -38,15 +38,26 @@ count_resource(struct acpi_resource *acpi_res, void *data) struct acpi_resource_address64 addr; acpi_status status; - if (info->res_num >= PCI_BUS_NUM_RESOURCES) - return AE_OK; - status = resource_to_addr(acpi_res, &addr); if (ACPI_SUCCESS(status)) info->res_num++; return AE_OK; } +static int +bus_has_transparent_bridge(struct pci_bus *bus) +{ + struct pci_dev *dev; + + list_for_each_entry(dev, &bus->devices, bus_list) { + u16 class = dev->class >> 8; + + if (class == PCI_CLASS_BRIDGE_PCI && dev->transparent) + return true; + } + return false; +} + static acpi_status setup_resource(struct acpi_resource *acpi_res, void *data) { @@ -56,9 +67,7 @@ setup_resource(struct acpi_resource *acpi_res, void *data) acpi_status status; unsigned long flags; struct resource *root; - - if (info->res_num >= PCI_BUS_NUM_RESOURCES) - return AE_OK; + int max_root_bus_resources = PCI_BUS_NUM_RESOURCES; status = resource_to_addr(acpi_res, &addr); if (!ACPI_SUCCESS(status)) @@ -82,6 +91,18 @@ setup_resource(struct acpi_resource *acpi_res, void *data) res->end = res->start + addr.address_length - 1; res->child = NULL; + if (bus_has_transparent_bridge(info->bus)) + max_root_bus_resources -= 3; + if (info->res_num >= max_root_bus_resources) { + printk(KERN_WARNING "PCI: Failed to allocate 0x%lx-0x%lx " + "from %s for %s due to _CRS returning more than " + "%d resource descriptors\n", (unsigned long) res->start, + (unsigned long) res->end, root->name, info->name, + max_root_bus_resources); + info->res_num++; + return AE_OK; + } + if (insert_resource(root, res)) { printk(KERN_ERR "PCI: Failed to allocate 0x%lx-0x%lx " "from %s for %s\n", (unsigned long) res->start, -- cgit v1.2.3