From fe830ef62ac6d8814e27b7e2f632848694b0e5c7 Mon Sep 17 00:00:00 2001 From: Jiang Liu Date: Sat, 25 May 2013 21:48:29 +0800 Subject: PCI: Introduce pci_bus_{get|put}() to manage PCI bus reference count Introduce helper functions pci_bus_{get|put}() to manage PCI bus reference count. Signed-off-by: Jiang Liu Signed-off-by: Yijing Wang Signed-off-by: Gu Zheng Signed-off-by: Bjorn Helgaas --- include/linux/pci.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include') diff --git a/include/linux/pci.h b/include/linux/pci.h index 3a24e4ff3248..7556c590ddfd 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -1018,6 +1018,8 @@ int pci_request_selected_regions_exclusive(struct pci_dev *, int, const char *); void pci_release_selected_regions(struct pci_dev *, int); /* drivers/pci/bus.c */ +struct pci_bus *pci_bus_get(struct pci_bus *bus); +void pci_bus_put(struct pci_bus *bus); void pci_add_resource(struct list_head *resources, struct resource *res); void pci_add_resource_offset(struct list_head *resources, struct resource *res, resource_size_t offset); -- cgit v1.2.3 From 3c6e6ae770f338ef3e54c5823c21063204f53537 Mon Sep 17 00:00:00 2001 From: Gu Zheng Date: Sat, 25 May 2013 21:48:30 +0800 Subject: PCI: Introduce pci_alloc_dev(struct pci_bus*) to replace alloc_pci_dev() Here we introduce a new interface to replace alloc_pci_dev(): struct pci_dev *pci_alloc_dev(struct pci_bus *bus) It takes a "struct pci_bus *" argument, so we can alloc a PCI device on a target PCI bus, and it acquires a reference on the pci_bus. We use pci_alloc_dev(NULL) to simplify the old alloc_pci_dev(), and keep it for a while but mark it as __deprecated. Holding a reference to the pci_bus ensures that referencing pci_dev->bus is valid as long as the pci_dev is valid. [bhelgaas: keep existing "return error early" structure in pci_alloc_dev()] Signed-off-by: Gu Zheng Signed-off-by: Jiang Liu Signed-off-by: Bjorn Helgaas --- drivers/pci/probe.c | 9 ++++++++- include/linux/pci.h | 3 ++- 2 files changed, 10 insertions(+), 2 deletions(-) (limited to 'include') diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 70f10fa3c1b2..d47ce1400c26 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -1200,7 +1200,7 @@ static void pci_release_bus_bridge_dev(struct device *dev) kfree(bridge); } -struct pci_dev *alloc_pci_dev(void) +struct pci_dev *pci_alloc_dev(struct pci_bus *bus) { struct pci_dev *dev; @@ -1210,9 +1210,16 @@ struct pci_dev *alloc_pci_dev(void) INIT_LIST_HEAD(&dev->bus_list); dev->dev.type = &pci_dev_type; + dev->bus = pci_bus_get(bus); return dev; } +EXPORT_SYMBOL(pci_alloc_dev); + +struct pci_dev *alloc_pci_dev(void) +{ + return pci_alloc_dev(NULL); +} EXPORT_SYMBOL(alloc_pci_dev); bool pci_bus_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *l, diff --git a/include/linux/pci.h b/include/linux/pci.h index 7556c590ddfd..b0f4a8264118 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -364,7 +364,8 @@ static inline struct pci_dev *pci_physfn(struct pci_dev *dev) return dev; } -struct pci_dev *alloc_pci_dev(void); +struct pci_dev *pci_alloc_dev(struct pci_bus *bus); +struct pci_dev * __deprecated alloc_pci_dev(void); #define to_pci_dev(n) container_of(n, struct pci_dev, dev) #define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL) -- cgit v1.2.3 From 65f6ae66a6fb44f614a1226c398fcb38e94b3c59 Mon Sep 17 00:00:00 2001 From: Alexander Gordeev Date: Mon, 13 May 2013 11:05:48 +0200 Subject: PCI: Allocate only as many MSI vectors as requested by driver Because of the encoding of the "Multiple Message Capable" and "Multiple Message Enable" fields, a device can only advertise that it's capable of a power-of-two number of vectors, and the OS can only enable a power-of-two number. For example, a device that's limited internally to using 18 vectors would have to advertise that it's capable of 32. The 14 extra vectors consume vector numbers and IRQ descriptors even though the device can't actually use them. This fix introduces a 'msi_desc::nvec_used' field to address this issue. When non-zero, it is the actual number of MSIs the device will send, as requested by the device driver. This value should be used by architectures to set up and tear down only as many interrupt resources as the device will actually use. Note, although the existing 'msi_desc::multiple' field might seem redundant, in fact it is not. The number of MSIs advertised need not be the smallest power-of-two larger than the number of MSIs the device will send. Thus, it is not always possible to derive the former from the latter, so we need to keep them both to handle this case. [bhelgaas: changelog, rename to "nvec_used"] Signed-off-by: Alexander Gordeev Signed-off-by: Bjorn Helgaas --- drivers/pci/msi.c | 10 ++++++++-- include/linux/msi.h | 1 + 2 files changed, 9 insertions(+), 2 deletions(-) (limited to 'include') diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c index 2c1075213bec..aca7578b05e5 100644 --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -81,7 +81,10 @@ void default_teardown_msi_irqs(struct pci_dev *dev) int i, nvec; if (entry->irq == 0) continue; - nvec = 1 << entry->msi_attrib.multiple; + if (entry->nvec_used) + nvec = entry->nvec_used; + else + nvec = 1 << entry->msi_attrib.multiple; for (i = 0; i < nvec; i++) arch_teardown_msi_irq(entry->irq + i); } @@ -336,7 +339,10 @@ static void free_msi_irqs(struct pci_dev *dev) int i, nvec; if (!entry->irq) continue; - nvec = 1 << entry->msi_attrib.multiple; + if (entry->nvec_used) + nvec = entry->nvec_used; + else + nvec = 1 << entry->msi_attrib.multiple; #ifdef CONFIG_GENERIC_HARDIRQS for (i = 0; i < nvec; i++) BUG_ON(irq_has_action(entry->irq + i)); diff --git a/include/linux/msi.h b/include/linux/msi.h index 20c2d6dd5d25..ee66f3a12fb6 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -35,6 +35,7 @@ struct msi_desc { u32 masked; /* mask bits */ unsigned int irq; + unsigned int nvec_used; /* number of messages */ struct list_head list; union { -- cgit v1.2.3 From bbebed6423f5b281f9ca314518531f90424f6f57 Mon Sep 17 00:00:00 2001 From: Jiang Liu Date: Tue, 28 May 2013 17:59:25 -0600 Subject: PCI/ACPI: Remove unused global list acpi_pci_roots Now the global list acpi_pci_roots pci_root.c is useless, remove it. Signed-off-by: Jiang Liu Signed-off-by: Bjorn Helgaas Acked-by: Rafael J. Wysocki Cc: Len Brown --- drivers/acpi/pci_root.c | 19 +------------------ include/acpi/acpi_bus.h | 1 - 2 files changed, 1 insertion(+), 19 deletions(-) (limited to 'include') diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c index 852fb96f94e5..18b7ab2dee4f 100644 --- a/drivers/acpi/pci_root.c +++ b/drivers/acpi/pci_root.c @@ -65,10 +65,6 @@ static struct acpi_scan_handler pci_root_handler = { .detach = acpi_pci_root_remove, }; -/* Lock to protect both acpi_pci_roots lists */ -static DEFINE_MUTEX(acpi_pci_root_lock); -static LIST_HEAD(acpi_pci_roots); - static DEFINE_MUTEX(osc_lock); /** @@ -423,7 +419,6 @@ static int acpi_pci_root_add(struct acpi_device *device, } } - INIT_LIST_HEAD(&root->node); root->device = device; root->segment = segment & 0xFFFF; strcpy(acpi_device_name(device), ACPI_PCI_ROOT_DEVICE_NAME); @@ -447,10 +442,6 @@ static int acpi_pci_root_add(struct acpi_device *device, * TBD: Need PCI interface for enumeration/configuration of roots. */ - mutex_lock(&acpi_pci_root_lock); - list_add_tail(&root->node, &acpi_pci_roots); - mutex_unlock(&acpi_pci_root_lock); - /* * Scan the Root Bridge * -------------------- @@ -464,7 +455,7 @@ static int acpi_pci_root_add(struct acpi_device *device, "Bus %04x:%02x not present in PCI namespace\n", root->segment, (unsigned int)root->secondary.start); result = -ENODEV; - goto out_del_root; + goto end; } /* Indicate support for various _OSC capabilities. */ @@ -545,11 +536,6 @@ static int acpi_pci_root_add(struct acpi_device *device, pci_bus_add_devices(root->bus); return 1; -out_del_root: - mutex_lock(&acpi_pci_root_lock); - list_del(&root->node); - mutex_unlock(&acpi_pci_root_lock); - end: kfree(root); return result; @@ -566,9 +552,6 @@ static void acpi_pci_root_remove(struct acpi_device *device) pci_remove_root_bus(root->bus); - mutex_lock(&acpi_pci_root_lock); - list_del(&root->node); - mutex_unlock(&acpi_pci_root_lock); kfree(root); } diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h index 98db31d9f9b4..af0f840f77c8 100644 --- a/include/acpi/acpi_bus.h +++ b/include/acpi/acpi_bus.h @@ -472,7 +472,6 @@ int register_acpi_bus_type(struct acpi_bus_type *); int unregister_acpi_bus_type(struct acpi_bus_type *); struct acpi_pci_root { - struct list_head node; struct acpi_device * device; struct pci_bus *bus; u16 segment; -- cgit v1.2.3 From cb93b1864088eb833ea9cef2c20f07d1961241b0 Mon Sep 17 00:00:00 2001 From: Yijing Wang Date: Wed, 29 May 2013 17:01:52 +0800 Subject: PCI: Fix comment typo for PCI_EXP_LNKCAP_CLKPM Fix trivial typo for PCI_EXP_LNKCAP_CLKPM comment. Signed-off-by: Yijing Wang Signed-off-by: Bjorn Helgaas --- include/uapi/linux/pci_regs.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include') diff --git a/include/uapi/linux/pci_regs.h b/include/uapi/linux/pci_regs.h index 864e324da80d..c3cc01d474b0 100644 --- a/include/uapi/linux/pci_regs.h +++ b/include/uapi/linux/pci_regs.h @@ -468,7 +468,7 @@ #define PCI_EXP_LNKCAP_ASPMS 0x00000c00 /* ASPM Support */ #define PCI_EXP_LNKCAP_L0SEL 0x00007000 /* L0s Exit Latency */ #define PCI_EXP_LNKCAP_L1EL 0x00038000 /* L1 Exit Latency */ -#define PCI_EXP_LNKCAP_CLKPM 0x00040000 /* L1 Clock Power Management */ +#define PCI_EXP_LNKCAP_CLKPM 0x00040000 /* Clock Power Management */ #define PCI_EXP_LNKCAP_SDERC 0x00080000 /* Surprise Down Error Reporting Capable */ #define PCI_EXP_LNKCAP_DLLLARC 0x00100000 /* Data Link Layer Link Active Reporting Capable */ #define PCI_EXP_LNKCAP_LBNC 0x00200000 /* Link Bandwidth Notification Capability */ -- cgit v1.2.3 From 6d481e2fd137e6c31e54318598a9c8ed1ebe280b Mon Sep 17 00:00:00 2001 From: Shane Huang Date: Mon, 3 Jun 2013 18:22:28 +0800 Subject: PCI: Put Hudson-2 device IDs together To put all AMD Hudson-2 device IDs together for better maintenance. [bhelgaas: also sort Hudson-2 devices by ID] Signed-off-by: Shane Huang Signed-off-by: Bjorn Helgaas Reviewed-by: Tejun Heo Acked-by: Jean Delvare --- include/linux/pci_ids.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'include') diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h index c12916248469..84c0bcc2a147 100644 --- a/include/linux/pci_ids.h +++ b/include/linux/pci_ids.h @@ -556,7 +556,6 @@ #define PCI_DEVICE_ID_AMD_8131_BRIDGE 0x7450 #define PCI_DEVICE_ID_AMD_8131_APIC 0x7451 #define PCI_DEVICE_ID_AMD_8132_BRIDGE 0x7458 -#define PCI_DEVICE_ID_AMD_HUDSON2_SMBUS 0x780b #define PCI_DEVICE_ID_AMD_CS5535_IDE 0x208F #define PCI_DEVICE_ID_AMD_CS5536_ISA 0x2090 #define PCI_DEVICE_ID_AMD_CS5536_FLASH 0x2091 @@ -568,8 +567,9 @@ #define PCI_DEVICE_ID_AMD_CS5536_IDE 0x209A #define PCI_DEVICE_ID_AMD_LX_VIDEO 0x2081 #define PCI_DEVICE_ID_AMD_LX_AES 0x2082 -#define PCI_DEVICE_ID_AMD_HUDSON2_IDE 0x780c #define PCI_DEVICE_ID_AMD_HUDSON2_SATA_IDE 0x7800 +#define PCI_DEVICE_ID_AMD_HUDSON2_SMBUS 0x780b +#define PCI_DEVICE_ID_AMD_HUDSON2_IDE 0x780c #define PCI_VENDOR_ID_TRIDENT 0x1023 #define PCI_DEVICE_ID_TRIDENT_4DWAVE_DX 0x2000 -- cgit v1.2.3 From 6ae32c539c0412ca789fb6041be45eeabf78431c Mon Sep 17 00:00:00 2001 From: Sebastian Ott Date: Tue, 4 Jun 2013 19:18:14 +0200 Subject: PCI: Add pcibios_release_device() Platforms may want to provide architecture-specific functionality when a PCI device is released. Add a pcibios_release_device() call that architectures can override to do so. Signed-off-by: Sebastian Ott Signed-off-by: Bjorn Helgaas --- drivers/pci/pci.c | 10 ++++++++++ drivers/pci/probe.c | 1 + include/linux/pci.h | 1 + 3 files changed, 12 insertions(+) (limited to 'include') diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index e5f4e55d407d..709791b70ca0 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -1334,6 +1334,16 @@ int __weak pcibios_add_device (struct pci_dev *dev) return 0; } +/** + * pcibios_release_device - provide arch specific hooks when releasing device dev + * @dev: the PCI device being released + * + * Permits the platform to provide architecture specific functionality when + * devices are released. This is the default implementation. Architecture + * implementations can override this. + */ +void __weak pcibios_release_device(struct pci_dev *dev) {} + /** * pcibios_disable_device - disable arch specific PCI resources for device dev * @dev: the PCI device to disable diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 70f10fa3c1b2..58cc0a8a0979 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -1132,6 +1132,7 @@ static void pci_release_dev(struct device *dev) pci_dev = to_pci_dev(dev); pci_release_capabilities(pci_dev); pci_release_of_node(pci_dev); + pcibios_release_device(pci_dev); kfree(pci_dev); } diff --git a/include/linux/pci.h b/include/linux/pci.h index 3a24e4ff3248..8f170e9073a5 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -1643,6 +1643,7 @@ void pcibios_set_master(struct pci_dev *dev); int pcibios_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state); int pcibios_add_device(struct pci_dev *dev); +void pcibios_release_device(struct pci_dev *dev); #ifdef CONFIG_PCI_MMCONFIG void __init pci_mmcfg_early_init(void); -- cgit v1.2.3 From 9e50a9122f048c67a4e83916434e2e212a6f0fe2 Mon Sep 17 00:00:00 2001 From: Betty Dall Date: Thu, 6 Jun 2013 12:10:49 -0600 Subject: PCI/AER: Move AER severity defines to aer.h The function aer_recover_queue() is a public interface and the severity argument uses #defines that are in the private header pci/pcie/aer/aerdrv.h. This patch moves the #defines from pci/pcie/aer/aerdrv.h to include/linux/aer.h. [bhelgaas: split "remove 'extern' from declarations" to another patch] Signed-off-by: Betty Dall Signed-off-by: Bjorn Helgaas --- drivers/pci/pcie/aer/aerdrv.h | 4 ---- include/linux/aer.h | 4 ++++ 2 files changed, 4 insertions(+), 4 deletions(-) (limited to 'include') diff --git a/drivers/pci/pcie/aer/aerdrv.h b/drivers/pci/pcie/aer/aerdrv.h index d12c77cd6991..90ea3e88041f 100644 --- a/drivers/pci/pcie/aer/aerdrv.h +++ b/drivers/pci/pcie/aer/aerdrv.h @@ -13,10 +13,6 @@ #include #include -#define AER_NONFATAL 0 -#define AER_FATAL 1 -#define AER_CORRECTABLE 2 - #define SYSTEM_ERROR_INTR_ON_MESG_MASK (PCI_EXP_RTCTL_SECEE| \ PCI_EXP_RTCTL_SENFEE| \ PCI_EXP_RTCTL_SEFEE) diff --git a/include/linux/aer.h b/include/linux/aer.h index ec10e1b24c1c..d2cf2e4f9c2d 100644 --- a/include/linux/aer.h +++ b/include/linux/aer.h @@ -7,6 +7,10 @@ #ifndef _AER_H_ #define _AER_H_ +#define AER_NONFATAL 0 +#define AER_FATAL 1 +#define AER_CORRECTABLE 2 + struct aer_header_log_regs { unsigned int dw0; unsigned int dw1; -- cgit v1.2.3 From fde41b9fa2d0d6abd5b1b5674f1da3bb40ebc98d Mon Sep 17 00:00:00 2001 From: Betty Dall Date: Thu, 6 Jun 2013 14:35:35 -0600 Subject: PCI/AER: Remove "extern" from function declarations We had an inconsistent mix of using and omitting the "extern" keyword on function declarations in header files. This removes them all. [bhelgaas: split out from "move AER severity defines" patch] Signed-off-by: Betty Dall Signed-off-by: Bjorn Helgaas --- include/linux/aer.h | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) (limited to 'include') diff --git a/include/linux/aer.h b/include/linux/aer.h index d2cf2e4f9c2d..55bb3dc4b2db 100644 --- a/include/linux/aer.h +++ b/include/linux/aer.h @@ -35,9 +35,9 @@ struct aer_capability_regs { #if defined(CONFIG_PCIEAER) /* pci-e port driver needs this function to enable aer */ -extern int pci_enable_pcie_error_reporting(struct pci_dev *dev); -extern int pci_disable_pcie_error_reporting(struct pci_dev *dev); -extern int pci_cleanup_aer_uncorrect_error_status(struct pci_dev *dev); +int pci_enable_pcie_error_reporting(struct pci_dev *dev); +int pci_disable_pcie_error_reporting(struct pci_dev *dev); +int pci_cleanup_aer_uncorrect_error_status(struct pci_dev *dev); #else static inline int pci_enable_pcie_error_reporting(struct pci_dev *dev) { @@ -53,10 +53,10 @@ static inline int pci_cleanup_aer_uncorrect_error_status(struct pci_dev *dev) } #endif -extern void cper_print_aer(const char *prefix, struct pci_dev *dev, - int cper_severity, struct aer_capability_regs *aer); -extern int cper_severity_to_aer(int cper_severity); -extern void aer_recover_queue(int domain, unsigned int bus, unsigned int devfn, - int severity); +void cper_print_aer(const char *prefix, struct pci_dev *dev, int cper_severity, + struct aer_capability_regs *aer); +int cper_severity_to_aer(int cper_severity); +void aer_recover_queue(int domain, unsigned int bus, unsigned int devfn, + int severity); #endif //_AER_H_ -- cgit v1.2.3 From 91bbe923d18cfff4286a84e59b9d5b61389c3027 Mon Sep 17 00:00:00 2001 From: Darren Hart Date: Tue, 25 Jun 2013 20:08:46 -0600 Subject: PCI: Add CircuitCo vendor ID and subsystem ID Add CircuitCo's newly created VENDOR ID and their first board subsystem ID for the MinnowBoard. [bhelgaas: sort, change DEVICE_ID to SUBSYSTEM_ID] Signed-off-by: Darren Hart Signed-off-by: Bjorn Helgaas --- include/linux/pci_ids.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include') diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h index c12916248469..4c7b3492452d 100644 --- a/include/linux/pci_ids.h +++ b/include/linux/pci_ids.h @@ -2476,6 +2476,9 @@ #define PCI_VENDOR_ID_ASMEDIA 0x1b21 +#define PCI_VENDOR_ID_CIRCUITCO 0x1cc8 +#define PCI_SUBSYSTEM_ID_CIRCUITCO_MINNOWBOARD 0x0001 + #define PCI_VENDOR_ID_TEKRAM 0x1de1 #define PCI_DEVICE_ID_TEKRAM_DC290 0xdc29 -- cgit v1.2.3