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authorLinus Torvalds <torvalds@linux-foundation.org>2013-07-03 16:31:35 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-07-03 16:31:35 -0700
commit862f0012549110d6f2586bf54b52ed4540cbff3a (patch)
tree83d29a684b885b1f58af76e0cd29b8552fd480ea /drivers/pci/pcie
parentf991fae5c6d42dfc5029150b05a78cf3f6c18cc9 (diff)
parenta0f75f9d495b3905b4c658c1d813a127f558a350 (diff)
downloadop-kernel-dev-862f0012549110d6f2586bf54b52ed4540cbff3a.zip
op-kernel-dev-862f0012549110d6f2586bf54b52ed4540cbff3a.tar.gz
Merge tag 'pci-v3.11-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull PCI changes from Bjorn Helgaas: "PCI device hotplug - Add pci_alloc_dev() interface (Gu Zheng) - Add pci_bus_get()/put() for reference counting (Jiang Liu) - Fix SR-IOV reference count issues (Jiang Liu) - Remove unused acpi_pci_roots list (Jiang Liu) MSI - Conserve interrupt resources on x86 (Alexander Gordeev) AER - Force fatal severity when component has been reset (Betty Dall) - Reset link below Root Port as well as Downstream Port (Betty Dall) - Fix "Firmware first" flag setting (Bjorn Helgaas) - Don't parse HEST for non-PCIe devices (Bjorn Helgaas) ASPM - Warn when we can't disable ASPM as driver requests (Bjorn Helgaas) Miscellaneous - Add CircuitCo PCI IDs (Darren Hart) - Add AMD CZ SATA and SMBus PCI IDs (Shane Huang) - Work around Ivytown NTB BAR size issue (Jon Mason) - Detect invalid initial BAR values (Kevin Hao) - Add pcibios_release_device() (Sebastian Ott) - Fix powerpc & sparc PCI_UNKNOWN power state usage (Bjorn Helgaas)" * tag 'pci-v3.11-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (51 commits) MAINTAINERS: Add ACPI folks for ACPI-related things under drivers/pci PCI: Add CircuitCo vendor ID and subsystem ID PCI: Use pdev->pm_cap instead of pci_find_capability(..,PCI_CAP_ID_PM) PCI: Return early on allocation failures to unindent mainline code PCI: Simplify IOV implementation and fix reference count races PCI: Drop redundant setting of bus->is_added in virtfn_add_bus() unicore32/PCI: Remove redundant call of pci_bus_add_devices() m68k/PCI: Remove redundant call of pci_bus_add_devices() PCI / ACPI / PM: Use correct power state strings in messages PCI: Fix comment typo for pcie_pme_remove() PCI: Rename pci_release_bus_bridge_dev() to pci_release_host_bridge_dev() PCI: Fix refcount issue in pci_create_root_bus() error recovery path ia64/PCI: Clean up pci_scan_root_bus() usage PCI/AER: Reset link for devices below Root Port or Downstream Port ACPI / APEI: Force fatal AER severity when component has been reset PCI/AER: Remove "extern" from function declarations PCI/AER: Move AER severity defines to aer.h PCI/AER: Set dev->__aer_firmware_first only for matching devices PCI/AER: Factor out HEST device type matching PCI/AER: Don't parse HEST table for non-PCIe devices ...
Diffstat (limited to 'drivers/pci/pcie')
-rw-r--r--drivers/pci/pcie/aer/aerdrv.h4
-rw-r--r--drivers/pci/pcie/aer/aerdrv_acpi.c47
-rw-r--r--drivers/pci/pcie/aer/aerdrv_core.c17
-rw-r--r--drivers/pci/pcie/aspm.c29
-rw-r--r--drivers/pci/pcie/pme.c2
5 files changed, 56 insertions, 43 deletions
diff --git a/drivers/pci/pcie/aer/aerdrv.h b/drivers/pci/pcie/aer/aerdrv.h
index d12c77c..90ea3e8 100644
--- a/drivers/pci/pcie/aer/aerdrv.h
+++ b/drivers/pci/pcie/aer/aerdrv.h
@@ -13,10 +13,6 @@
#include <linux/aer.h>
#include <linux/interrupt.h>
-#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/drivers/pci/pcie/aer/aerdrv_acpi.c b/drivers/pci/pcie/aer/aerdrv_acpi.c
index 5194a7d..cf611ab 100644
--- a/drivers/pci/pcie/aer/aerdrv_acpi.c
+++ b/drivers/pci/pcie/aer/aerdrv_acpi.c
@@ -29,6 +29,22 @@ static inline int hest_match_pci(struct acpi_hest_aer_common *p,
p->function == PCI_FUNC(pci->devfn));
}
+static inline bool hest_match_type(struct acpi_hest_header *hest_hdr,
+ struct pci_dev *dev)
+{
+ u16 hest_type = hest_hdr->type;
+ u8 pcie_type = pci_pcie_type(dev);
+
+ if ((hest_type == ACPI_HEST_TYPE_AER_ROOT_PORT &&
+ pcie_type == PCI_EXP_TYPE_ROOT_PORT) ||
+ (hest_type == ACPI_HEST_TYPE_AER_ENDPOINT &&
+ pcie_type == PCI_EXP_TYPE_ENDPOINT) ||
+ (hest_type == ACPI_HEST_TYPE_AER_BRIDGE &&
+ (dev->class >> 16) == PCI_BASE_CLASS_BRIDGE))
+ return true;
+ return false;
+}
+
struct aer_hest_parse_info {
struct pci_dev *pci_dev;
int firmware_first;
@@ -38,34 +54,16 @@ static int aer_hest_parse(struct acpi_hest_header *hest_hdr, void *data)
{
struct aer_hest_parse_info *info = data;
struct acpi_hest_aer_common *p;
- u8 pcie_type = 0;
- u8 bridge = 0;
- int ff = 0;
-
- switch (hest_hdr->type) {
- case ACPI_HEST_TYPE_AER_ROOT_PORT:
- pcie_type = PCI_EXP_TYPE_ROOT_PORT;
- break;
- case ACPI_HEST_TYPE_AER_ENDPOINT:
- pcie_type = PCI_EXP_TYPE_ENDPOINT;
- break;
- case ACPI_HEST_TYPE_AER_BRIDGE:
- if ((info->pci_dev->class >> 16) == PCI_BASE_CLASS_BRIDGE)
- bridge = 1;
- break;
- default:
- return 0;
- }
+ int ff;
p = (struct acpi_hest_aer_common *)(hest_hdr + 1);
+ ff = !!(p->flags & ACPI_HEST_FIRMWARE_FIRST);
if (p->flags & ACPI_HEST_GLOBAL) {
- if ((pci_is_pcie(info->pci_dev) &&
- pci_pcie_type(info->pci_dev) == pcie_type) || bridge)
- ff = !!(p->flags & ACPI_HEST_FIRMWARE_FIRST);
+ if (hest_match_type(hest_hdr, info->pci_dev))
+ info->firmware_first = ff;
} else
if (hest_match_pci(p, info->pci_dev))
- ff = !!(p->flags & ACPI_HEST_FIRMWARE_FIRST);
- info->firmware_first = ff;
+ info->firmware_first = ff;
return 0;
}
@@ -89,6 +87,9 @@ static void aer_set_firmware_first(struct pci_dev *pci_dev)
int pcie_aer_get_firmware_first(struct pci_dev *dev)
{
+ if (!pci_is_pcie(dev))
+ return 0;
+
if (!dev->__aer_firmware_first_valid)
aer_set_firmware_first(dev);
return dev->__aer_firmware_first;
diff --git a/drivers/pci/pcie/aer/aerdrv_core.c b/drivers/pci/pcie/aer/aerdrv_core.c
index 0f4554e..8b68ae5 100644
--- a/drivers/pci/pcie/aer/aerdrv_core.c
+++ b/drivers/pci/pcie/aer/aerdrv_core.c
@@ -400,16 +400,16 @@ void aer_do_secondary_bus_reset(struct pci_dev *dev)
}
/**
- * default_downstream_reset_link - default reset function for Downstream Port
- * @dev: pointer to downstream port's pci_dev data structure
+ * default_reset_link - default reset function
+ * @dev: pointer to pci_dev data structure
*
- * Invoked when performing link reset at Downstream Port w/ no aer driver.
+ * Invoked when performing link reset on a Downstream Port or a
+ * Root Port with no aer driver.
*/
-static pci_ers_result_t default_downstream_reset_link(struct pci_dev *dev)
+static pci_ers_result_t default_reset_link(struct pci_dev *dev)
{
aer_do_secondary_bus_reset(dev);
- dev_printk(KERN_DEBUG, &dev->dev,
- "Downstream Port link has been reset\n");
+ dev_printk(KERN_DEBUG, &dev->dev, "downstream link has been reset\n");
return PCI_ERS_RESULT_RECOVERED;
}
@@ -458,8 +458,9 @@ static pci_ers_result_t reset_link(struct pci_dev *dev)
if (driver && driver->reset_link) {
status = driver->reset_link(udev);
- } else if (pci_pcie_type(udev) == PCI_EXP_TYPE_DOWNSTREAM) {
- status = default_downstream_reset_link(udev);
+ } else if (pci_pcie_type(udev) == PCI_EXP_TYPE_DOWNSTREAM ||
+ pci_pcie_type(udev) == PCI_EXP_TYPE_ROOT_PORT) {
+ status = default_reset_link(udev);
} else {
dev_printk(KERN_DEBUG, &dev->dev,
"no link-reset support at upstream device %s\n",
diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c
index d320df6..403a443 100644
--- a/drivers/pci/pcie/aspm.c
+++ b/drivers/pci/pcie/aspm.c
@@ -714,19 +714,12 @@ void pcie_aspm_powersave_config_link(struct pci_dev *pdev)
up_read(&pci_bus_sem);
}
-/*
- * pci_disable_link_state - disable pci device's link state, so the link will
- * never enter specific states
- */
static void __pci_disable_link_state(struct pci_dev *pdev, int state, bool sem,
bool force)
{
struct pci_dev *parent = pdev->bus->self;
struct pcie_link_state *link;
- if (aspm_disabled && !force)
- return;
-
if (!pci_is_pcie(pdev))
return;
@@ -736,6 +729,19 @@ static void __pci_disable_link_state(struct pci_dev *pdev, int state, bool sem,
if (!parent || !parent->link_state)
return;
+ /*
+ * A driver requested that ASPM be disabled on this device, but
+ * if we don't have permission to manage ASPM (e.g., on ACPI
+ * systems we have to observe the FADT ACPI_FADT_NO_ASPM bit and
+ * the _OSC method), we can't honor that request. Windows has
+ * a similar mechanism using "PciASPMOptOut", which is also
+ * ignored in this situation.
+ */
+ if (aspm_disabled && !force) {
+ dev_warn(&pdev->dev, "can't disable ASPM; OS doesn't have ASPM control\n");
+ return;
+ }
+
if (sem)
down_read(&pci_bus_sem);
mutex_lock(&aspm_lock);
@@ -761,6 +767,15 @@ void pci_disable_link_state_locked(struct pci_dev *pdev, int state)
}
EXPORT_SYMBOL(pci_disable_link_state_locked);
+/**
+ * pci_disable_link_state - Disable device's link state, so the link will
+ * never enter specific states. Note that if the BIOS didn't grant ASPM
+ * control to the OS, this does nothing because we can't touch the LNKCTL
+ * register.
+ *
+ * @pdev: PCI device
+ * @state: ASPM link state to disable
+ */
void pci_disable_link_state(struct pci_dev *pdev, int state)
{
__pci_disable_link_state(pdev, state, true, false);
diff --git a/drivers/pci/pcie/pme.c b/drivers/pci/pcie/pme.c
index 795db1f..e56e594 100644
--- a/drivers/pci/pcie/pme.c
+++ b/drivers/pci/pcie/pme.c
@@ -408,7 +408,7 @@ static int pcie_pme_resume(struct pcie_device *srv)
/**
* pcie_pme_remove - Prepare PCIe PME service device for removal.
- * @srv - PCIe service device to resume.
+ * @srv - PCIe service device to remove.
*/
static void pcie_pme_remove(struct pcie_device *srv)
{
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