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authorLinus Torvalds <torvalds@linux-foundation.org>2010-08-06 11:44:36 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-08-06 11:44:36 -0700
commit1cfd2bda8c486ae0e7a8005354758ebb68172bca (patch)
tree76ce15f377d8d6eb3ae4aa8b8b0b415457e38d36 /drivers/pci
parentb57bdda58cda0aaf6def042d101dd85977a286ed (diff)
parent763e9db9994e27a7d2cb3701c8a097a867d0e0b4 (diff)
Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6
* 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6: (30 commits) PCI: update for owner removal from struct device_attribute PCI: Fix warnings when CONFIG_DMI unset PCI: Do not run NVidia quirks related to MSI with MSI disabled x86/PCI: use for_each_pci_dev() PCI: use for_each_pci_dev() PCI: MSI: Restore read_msi_msg_desc(); add get_cached_msi_msg_desc() PCI: export SMBIOS provided firmware instance and label to sysfs PCI: Allow read/write access to sysfs I/O port resources x86/PCI: use host bridge _CRS info on ASRock ALiveSATA2-GLAN PCI: remove unused HAVE_ARCH_PCI_SET_DMA_MAX_SEGMENT_{SIZE|BOUNDARY} PCI: disable mmio during bar sizing PCI: MSI: Remove unsafe and unnecessary hardware access PCI: Default PCIe ASPM control to on and require !EMBEDDED to disable PCI: kernel oops on access to pci proc file while hot-removal PCI: pci-sysfs: remove casts from void* ACPI: Disable ASPM if the platform won't provide _OSC control for PCIe PCI hotplug: make sure child bridges are enabled at hotplug time PCI hotplug: shpchp: Removed check for hotplug of display devices PCI hotplug: pciehp: Fixed return value sign for pciehp_unconfigure_device PCI: Don't enable aspm before drivers have had a chance to veto it ...
Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/Makefile3
-rw-r--r--drivers/pci/bus.c4
-rw-r--r--drivers/pci/hotplug/fakephp.c2
-rw-r--r--drivers/pci/hotplug/pciehp_pci.c2
-rw-r--r--drivers/pci/hotplug/shpchp_hpc.c2
-rw-r--r--drivers/pci/hotplug/shpchp_pci.c19
-rw-r--r--drivers/pci/msi.c29
-rw-r--r--drivers/pci/pci-driver.c32
-rw-r--r--drivers/pci/pci-label.c143
-rw-r--r--drivers/pci/pci-sysfs.c75
-rw-r--r--drivers/pci/pci.c4
-rw-r--r--drivers/pci/pci.h9
-rw-r--r--drivers/pci/pcie/Kconfig20
-rw-r--r--drivers/pci/pcie/aer/aerdrv_core.c17
-rw-r--r--drivers/pci/pcie/aspm.c16
-rw-r--r--drivers/pci/probe.c10
-rw-r--r--drivers/pci/proc.c6
-rw-r--r--drivers/pci/quirks.c42
-rw-r--r--drivers/pci/search.c2
-rw-r--r--drivers/pci/setup-bus.c12
-rw-r--r--drivers/pci/setup-irq.c3
21 files changed, 391 insertions, 61 deletions
diff --git a/drivers/pci/Makefile b/drivers/pci/Makefile
index 0b51857fbaf..dc1aa092286 100644
--- a/drivers/pci/Makefile
+++ b/drivers/pci/Makefile
@@ -55,6 +55,9 @@ obj-$(CONFIG_MICROBLAZE) += setup-bus.o
#
obj-$(CONFIG_ACPI) += pci-acpi.o
+# SMBIOS provided firmware instance and labels
+obj-$(CONFIG_DMI) += pci-label.o
+
# Cardbus & CompactPCI use setup-bus
obj-$(CONFIG_HOTPLUG) += setup-bus.o
diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c
index 628ea20a884..7f0af0e9b82 100644
--- a/drivers/pci/bus.c
+++ b/drivers/pci/bus.c
@@ -56,7 +56,7 @@ void pci_bus_remove_resources(struct pci_bus *bus)
int i;
for (i = 0; i < PCI_BRIDGE_RESOURCE_NUM; i++)
- bus->resource[i] = 0;
+ bus->resource[i] = NULL;
list_for_each_entry_safe(bus_res, tmp, &bus->resources, list) {
list_del(&bus_res->list);
@@ -240,6 +240,8 @@ void pci_enable_bridges(struct pci_bus *bus)
if (dev->subordinate) {
if (!pci_is_enabled(dev)) {
retval = pci_enable_device(dev);
+ if (retval)
+ dev_err(&dev->dev, "Error enabling bridge (%d), continuing\n", retval);
pci_set_master(dev);
}
pci_enable_bridges(dev->subordinate);
diff --git a/drivers/pci/hotplug/fakephp.c b/drivers/pci/hotplug/fakephp.c
index 5317e4d7d96..17d10e2e8fb 100644
--- a/drivers/pci/hotplug/fakephp.c
+++ b/drivers/pci/hotplug/fakephp.c
@@ -135,7 +135,7 @@ static int __init init_legacy(void)
struct pci_dev *pdev = NULL;
/* Add existing devices */
- while ((pdev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pdev)))
+ for_each_pci_dev(pdev)
legacy_add_slot(pdev);
/* Be alerted of any new ones */
diff --git a/drivers/pci/hotplug/pciehp_pci.c b/drivers/pci/hotplug/pciehp_pci.c
index 2fce726758d..a4031dfe938 100644
--- a/drivers/pci/hotplug/pciehp_pci.c
+++ b/drivers/pci/hotplug/pciehp_pci.c
@@ -137,7 +137,7 @@ int pciehp_unconfigure_device(struct slot *p_slot)
"Cannot remove display device %s\n",
pci_name(temp));
pci_dev_put(temp);
- rc = EINVAL;
+ rc = -EINVAL;
break;
}
}
diff --git a/drivers/pci/hotplug/shpchp_hpc.c b/drivers/pci/hotplug/shpchp_hpc.c
index 5f5e8d2e355..d3985e7deab 100644
--- a/drivers/pci/hotplug/shpchp_hpc.c
+++ b/drivers/pci/hotplug/shpchp_hpc.c
@@ -113,7 +113,7 @@
#define CON_PFAULT_INTR_MASK (1 << 28)
#define MRL_CHANGE_SERR_MASK (1 << 29)
#define CON_PFAULT_SERR_MASK (1 << 30)
-#define SLOT_REG_RSVDZ_MASK (1 << 15) | (7 << 21)
+#define SLOT_REG_RSVDZ_MASK ((1 << 15) | (7 << 21))
/*
* SHPC Command Code definitnions
diff --git a/drivers/pci/hotplug/shpchp_pci.c b/drivers/pci/hotplug/shpchp_pci.c
index 8c3d3219f22..a2ccfcd3c29 100644
--- a/drivers/pci/hotplug/shpchp_pci.c
+++ b/drivers/pci/hotplug/shpchp_pci.c
@@ -60,12 +60,6 @@ int __ref shpchp_configure_device(struct slot *p_slot)
dev = pci_get_slot(parent, PCI_DEVFN(p_slot->device, fn));
if (!dev)
continue;
- if ((dev->class >> 16) == PCI_BASE_CLASS_DISPLAY) {
- ctrl_err(ctrl, "Cannot hot-add display device %s\n",
- pci_name(dev));
- pci_dev_put(dev);
- continue;
- }
if ((dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) ||
(dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)) {
/* Find an unused bus number for the new bridge */
@@ -114,17 +108,11 @@ int shpchp_unconfigure_device(struct slot *p_slot)
ctrl_dbg(ctrl, "%s: domain:bus:dev = %04x:%02x:%02x\n",
__func__, pci_domain_nr(parent), p_slot->bus, p_slot->device);
- for (j=0; j<8 ; j++) {
- struct pci_dev* temp = pci_get_slot(parent,
+ for (j = 0; j < 8 ; j++) {
+ struct pci_dev *temp = pci_get_slot(parent,
(p_slot->device << 3) | j);
if (!temp)
continue;
- if ((temp->class >> 16) == PCI_BASE_CLASS_DISPLAY) {
- ctrl_err(ctrl, "Cannot remove display device %s\n",
- pci_name(temp));
- pci_dev_put(temp);
- continue;
- }
if (temp->hdr_type == PCI_HEADER_TYPE_BRIDGE) {
pci_read_config_byte(temp, PCI_BRIDGE_CONTROL, &bctl);
if (bctl & PCI_BRIDGE_CTL_VGA) {
@@ -132,7 +120,8 @@ int shpchp_unconfigure_device(struct slot *p_slot)
"Cannot remove display device %s\n",
pci_name(temp));
pci_dev_put(temp);
- continue;
+ rc = -EINVAL;
+ break;
}
}
pci_remove_bus_device(temp);
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 77b68eaf021..69b7be33b3a 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -196,6 +196,9 @@ void unmask_msi_irq(unsigned int irq)
void read_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg)
{
struct msi_desc *entry = get_irq_desc_msi(desc);
+
+ BUG_ON(entry->dev->current_state != PCI_D0);
+
if (entry->msi_attrib.is_msix) {
void __iomem *base = entry->mask_base +
entry->msi_attrib.entry_nr * PCI_MSIX_ENTRY_SIZE;
@@ -229,10 +232,32 @@ void read_msi_msg(unsigned int irq, struct msi_msg *msg)
read_msi_msg_desc(desc, msg);
}
+void get_cached_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg)
+{
+ struct msi_desc *entry = get_irq_desc_msi(desc);
+
+ /* Assert that the cache is valid, assuming that
+ * valid messages are not all-zeroes. */
+ BUG_ON(!(entry->msg.address_hi | entry->msg.address_lo |
+ entry->msg.data));
+
+ *msg = entry->msg;
+}
+
+void get_cached_msi_msg(unsigned int irq, struct msi_msg *msg)
+{
+ struct irq_desc *desc = irq_to_desc(irq);
+
+ get_cached_msi_msg_desc(desc, msg);
+}
+
void write_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg)
{
struct msi_desc *entry = get_irq_desc_msi(desc);
- if (entry->msi_attrib.is_msix) {
+
+ if (entry->dev->current_state != PCI_D0) {
+ /* Don't touch the hardware now */
+ } else if (entry->msi_attrib.is_msix) {
void __iomem *base;
base = entry->mask_base +
entry->msi_attrib.entry_nr * PCI_MSIX_ENTRY_SIZE;
@@ -435,7 +460,7 @@ static int msi_capability_init(struct pci_dev *dev, int nvec)
static void __iomem *msix_map_region(struct pci_dev *dev, unsigned pos,
unsigned nr_entries)
{
- unsigned long phys_addr;
+ resource_size_t phys_addr;
u32 table_offset;
u8 bir;
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index f9a0aec3abc..8a6f797de8e 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -289,8 +289,26 @@ struct drv_dev_and_id {
static long local_pci_probe(void *_ddi)
{
struct drv_dev_and_id *ddi = _ddi;
-
- return ddi->drv->probe(ddi->dev, ddi->id);
+ struct device *dev = &ddi->dev->dev;
+ int rc;
+
+ /* Unbound PCI devices are always set to disabled and suspended.
+ * During probe, the device is set to enabled and active and the
+ * usage count is incremented. If the driver supports runtime PM,
+ * it should call pm_runtime_put_noidle() in its probe routine and
+ * pm_runtime_get_noresume() in its remove routine.
+ */
+ pm_runtime_get_noresume(dev);
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
+
+ rc = ddi->drv->probe(ddi->dev, ddi->id);
+ if (rc) {
+ pm_runtime_disable(dev);
+ pm_runtime_set_suspended(dev);
+ pm_runtime_put_noidle(dev);
+ }
+ return rc;
}
static int pci_call_probe(struct pci_driver *drv, struct pci_dev *dev,
@@ -369,11 +387,19 @@ static int pci_device_remove(struct device * dev)
struct pci_driver * drv = pci_dev->driver;
if (drv) {
- if (drv->remove)
+ if (drv->remove) {
+ pm_runtime_get_sync(dev);
drv->remove(pci_dev);
+ pm_runtime_put_noidle(dev);
+ }
pci_dev->driver = NULL;
}
+ /* Undo the runtime PM settings in local_pci_probe() */
+ pm_runtime_disable(dev);
+ pm_runtime_set_suspended(dev);
+ pm_runtime_put_noidle(dev);
+
/*
* If the device is still on, set the power state as "unknown",
* since it might change by the next time we load the driver.
diff --git a/drivers/pci/pci-label.c b/drivers/pci/pci-label.c
new file mode 100644
index 00000000000..90c0a729cd3
--- /dev/null
+++ b/drivers/pci/pci-label.c
@@ -0,0 +1,143 @@
+/*
+ * Purpose: Export the firmware instance and label associated with
+ * a pci device to sysfs
+ * Copyright (C) 2010 Dell Inc.
+ * by Narendra K <Narendra_K@dell.com>,
+ * Jordan Hargrave <Jordan_Hargrave@dell.com>
+ *
+ * SMBIOS defines type 41 for onboard pci devices. This code retrieves
+ * the instance number and string from the type 41 record and exports
+ * it to sysfs.
+ *
+ * Please see http://linux.dell.com/wiki/index.php/Oss/libnetdevname for more
+ * information.
+ */
+
+#include <linux/dmi.h>
+#include <linux/sysfs.h>
+#include <linux/pci.h>
+#include <linux/pci_ids.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include "pci.h"
+
+enum smbios_attr_enum {
+ SMBIOS_ATTR_NONE = 0,
+ SMBIOS_ATTR_LABEL_SHOW,
+ SMBIOS_ATTR_INSTANCE_SHOW,
+};
+
+static mode_t
+find_smbios_instance_string(struct pci_dev *pdev, char *buf,
+ enum smbios_attr_enum attribute)
+{
+ const struct dmi_device *dmi;
+ struct dmi_dev_onboard *donboard;
+ int bus;
+ int devfn;
+
+ bus = pdev->bus->number;
+ devfn = pdev->devfn;
+
+ dmi = NULL;
+ while ((dmi = dmi_find_device(DMI_DEV_TYPE_DEV_ONBOARD,
+ NULL, dmi)) != NULL) {
+ donboard = dmi->device_data;
+ if (donboard && donboard->bus == bus &&
+ donboard->devfn == devfn) {
+ if (buf) {
+ if (attribute == SMBIOS_ATTR_INSTANCE_SHOW)
+ return scnprintf(buf, PAGE_SIZE,
+ "%d\n",
+ donboard->instance);
+ else if (attribute == SMBIOS_ATTR_LABEL_SHOW)
+ return scnprintf(buf, PAGE_SIZE,
+ "%s\n",
+ dmi->name);
+ }
+ return strlen(dmi->name);
+ }
+ }
+ return 0;
+}
+
+static mode_t
+smbios_instance_string_exist(struct kobject *kobj, struct attribute *attr,
+ int n)
+{
+ struct device *dev;
+ struct pci_dev *pdev;
+
+ dev = container_of(kobj, struct device, kobj);
+ pdev = to_pci_dev(dev);
+
+ return find_smbios_instance_string(pdev, NULL, SMBIOS_ATTR_NONE) ?
+ S_IRUGO : 0;
+}
+
+static ssize_t
+smbioslabel_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct pci_dev *pdev;
+ pdev = to_pci_dev(dev);
+
+ return find_smbios_instance_string(pdev, buf,
+ SMBIOS_ATTR_LABEL_SHOW);
+}
+
+static ssize_t
+smbiosinstance_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct pci_dev *pdev;
+ pdev = to_pci_dev(dev);
+
+ return find_smbios_instance_string(pdev, buf,
+ SMBIOS_ATTR_INSTANCE_SHOW);
+}
+
+static struct device_attribute smbios_attr_label = {
+ .attr = {.name = "label", .mode = 0444},
+ .show = smbioslabel_show,
+};
+
+static struct device_attribute smbios_attr_instance = {
+ .attr = {.name = "index", .mode = 0444},
+ .show = smbiosinstance_show,
+};
+
+static struct attribute *smbios_attributes[] = {
+ &smbios_attr_label.attr,
+ &smbios_attr_instance.attr,
+ NULL,
+};
+
+static struct attribute_group smbios_attr_group = {
+ .attrs = smbios_attributes,
+ .is_visible = smbios_instance_string_exist,
+};
+
+static int
+pci_create_smbiosname_file(struct pci_dev *pdev)
+{
+ if (!sysfs_create_group(&pdev->dev.kobj, &smbios_attr_group))
+ return 0;
+ return -ENODEV;
+}
+
+static void
+pci_remove_smbiosname_file(struct pci_dev *pdev)
+{
+ sysfs_remove_group(&pdev->dev.kobj, &smbios_attr_group);
+}
+
+void pci_create_firmware_label_files(struct pci_dev *pdev)
+{
+ if (!pci_create_smbiosname_file(pdev))
+ ;
+}
+
+void pci_remove_firmware_label_files(struct pci_dev *pdev)
+{
+ pci_remove_smbiosname_file(pdev);
+}
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index c9957f68ac9..b5a7d9bfcb2 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -734,7 +734,7 @@ pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr,
{
struct pci_dev *pdev = to_pci_dev(container_of(kobj,
struct device, kobj));
- struct resource *res = (struct resource *)attr->private;
+ struct resource *res = attr->private;
enum pci_mmap_state mmap_type;
resource_size_t start, end;
int i;
@@ -778,6 +778,70 @@ pci_mmap_resource_wc(struct file *filp, struct kobject *kobj,
return pci_mmap_resource(kobj, attr, vma, 1);
}
+static ssize_t
+pci_resource_io(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *attr, char *buf,
+ loff_t off, size_t count, bool write)
+{
+ struct pci_dev *pdev = to_pci_dev(container_of(kobj,
+ struct device, kobj));
+ struct resource *res = attr->private;
+ unsigned long port = off;
+ int i;
+
+ for (i = 0; i < PCI_ROM_RESOURCE; i++)
+ if (res == &pdev->resource[i])
+ break;
+ if (i >= PCI_ROM_RESOURCE)
+ return -ENODEV;
+
+ port += pci_resource_start(pdev, i);
+
+ if (port > pci_resource_end(pdev, i))
+ return 0;
+
+ if (port + count - 1 > pci_resource_end(pdev, i))
+ return -EINVAL;
+
+ switch (count) {
+ case 1:
+ if (write)
+ outb(*(u8 *)buf, port);
+ else
+ *(u8 *)buf = inb(port);
+ return 1;
+ case 2:
+ if (write)
+ outw(*(u16 *)buf, port);
+ else
+ *(u16 *)buf = inw(port);
+ return 2;
+ case 4:
+ if (write)
+ outl(*(u32 *)buf, port);
+ else
+ *(u32 *)buf = inl(port);
+ return 4;
+ }
+ return -EINVAL;
+}
+
+static ssize_t
+pci_read_resource_io(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *attr, char *buf,
+ loff_t off, size_t count)
+{
+ return pci_resource_io(filp, kobj, attr, buf, off, count, false);
+}
+
+static ssize_t
+pci_write_resource_io(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *attr, char *buf,
+ loff_t off, size_t count)
+{
+ return pci_resource_io(filp, kobj, attr, buf, off, count, true);
+}
+
/**
* pci_remove_resource_files - cleanup resource files
* @pdev: dev to cleanup
@@ -828,6 +892,10 @@ static int pci_create_attr(struct pci_dev *pdev, int num, int write_combine)
sprintf(res_attr_name, "resource%d", num);
res_attr->mmap = pci_mmap_resource_uc;
}
+ if (pci_resource_flags(pdev, num) & IORESOURCE_IO) {
+ res_attr->read = pci_read_resource_io;
+ res_attr->write = pci_write_resource_io;
+ }
res_attr->attr.name = res_attr_name;
res_attr->attr.mode = S_IRUSR | S_IWUSR;
res_attr->size = pci_resource_len(pdev, num);
@@ -1097,6 +1165,8 @@ int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev)
if (retval)
goto err_vga_file;
+ pci_create_firmware_label_files(pdev);
+
return 0;
err_vga_file:
@@ -1164,6 +1234,9 @@ void pci_remove_sysfs_dev_files(struct pci_dev *pdev)
sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr);
kfree(pdev->rom_attr);
}
+
+ pci_remove_firmware_label_files(pdev);
+
}
static int __init pci_sysfs_init(void)
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 130ed1daf0f..7fa3cbd742c 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -2312,21 +2312,17 @@ void pci_msi_off(struct pci_dev *dev)
}
EXPORT_SYMBOL_GPL(pci_msi_off);
-#ifndef HAVE_ARCH_PCI_SET_DMA_MAX_SEGMENT_SIZE
int pci_set_dma_max_seg_size(struct pci_dev *dev, unsigned int size)
{
return dma_set_max_seg_size(&dev->dev, size);
}
EXPORT_SYMBOL(pci_set_dma_max_seg_size);
-#endif
-#ifndef HAVE_ARCH_PCI_SET_DMA_SEGMENT_BOUNDARY
int pci_set_dma_seg_boundary(struct pci_dev *dev, unsigned long mask)
{
return dma_set_seg_boundary(&dev->dev, mask);
}
EXPORT_SYMBOL(pci_set_dma_seg_boundary);
-#endif
static int pcie_flr(struct pci_dev *dev, int probe)
{
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index c8b7fd056cc..679c39de6a8 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -11,6 +11,15 @@
extern int pci_uevent(struct device *dev, struct kobj_uevent_env *env);
extern int pci_create_sysfs_dev_files(struct pci_dev *pdev);
extern void pci_remove_sysfs_dev_files(struct pci_dev *pdev);
+#ifndef CONFIG_DMI
+static inline void pci_create_firmware_label_files(struct pci_dev *pdev)
+{ return; }
+static inline void pci_remove_firmware_label_files(struct pci_dev *pdev)
+{ return; }
+#else
+extern void pci_create_firmware_label_files(struct pci_dev *pdev);
+extern void pci_remove_firmware_label_files(struct pci_dev *pdev);
+#endif
extern void pci_cleanup_rom(struct pci_dev *dev);
#ifdef HAVE_PCI_MMAP
extern int pci_mmap_fits(struct pci_dev *pdev, int resno,
diff --git a/drivers/pci/pcie/Kconfig b/drivers/pci/pcie/Kconfig
index b8b494b3e0d..dda70981b7a 100644
--- a/drivers/pci/pcie/Kconfig
+++ b/drivers/pci/pcie/Kconfig
@@ -31,14 +31,22 @@ source "drivers/pci/pcie/aer/Kconfig"
# PCI Express ASPM
#
config PCIEASPM
- bool "PCI Express ASPM support(Experimental)"
- depends on PCI && EXPERIMENTAL && PCIEPORTBUS
- default n
+ bool "PCI Express ASPM control" if EMBEDDED
+ depends on PCI && PCIEPORTBUS
+ default y
help
- This enables PCI Express ASPM (Active State Power Management) and
- Clock Power Management. ASPM supports state L0/L0s/L1.
+ This enables OS control over PCI Express ASPM (Active State
+ Power Management) and Clock Power Management. ASPM supports
+ state L0/L0s/L1.
- When in doubt, say N.
+ ASPM is initially set up the the firmware. With this option enabled,
+ Linux can modify this state in order to disable ASPM on known-bad
+ hardware or configurations and enable it when known-safe.
+
+ ASPM can be disabled or enabled at runtime via
+ /sys/module/pcie_aspm/parameters/policy
+
+ When in doubt, say Y.
config PCIEASPM_DEBUG
bool "Debug PCI Express ASPM"
depends on PCIEASPM
diff --git a/drivers/pci/pcie/aer/aerdrv_core.c b/drivers/pci/pcie/aer/aerdrv_core.c
index 8af4f619bba..fc0b5a93e1d 100644
--- a/drivers/pci/pcie/aer/aerdrv_core.c
+++ b/drivers/pci/pcie/aer/aerdrv_core.c
@@ -727,20 +727,21 @@ static void aer_isr_one_error(struct pcie_device *p_device,
static int get_e_source(struct aer_rpc *rpc, struct aer_err_source *e_src)
{
unsigned long flags;
- int ret = 0;
/* Lock access to Root error producer/consumer index */
spin_lock_irqsave(&rpc->e_lock, flags);
- if (rpc->prod_idx != rpc->cons_idx) {
- *e_src = rpc->e_sources[rpc->cons_idx];
- rpc->cons_idx++;
- if (rpc->cons_idx == AER_ERROR_SOURCES_MAX)
- rpc->cons_idx = 0;
- ret = 1;
+ if (rpc->prod_idx == rpc->cons_idx) {
+ spin_unlock_irqrestore(&rpc->e_lock, flags);
+ return 0;
}
+
+ *e_src = rpc->e_sources[rpc->cons_idx];
+ rpc->cons_idx++;
+ if (rpc->cons_idx == AER_ERROR_SOURCES_MAX)
+ rpc->cons_idx = 0;
spin_unlock_irqrestore(&rpc->e_lock, flags);
- return ret;
+ return 1;
}
/**
diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c
index be53d98fa38..71222814c1e 100644
--- a/drivers/pci/pcie/aspm.c
+++ b/drivers/pci/pcie/aspm.c
@@ -588,11 +588,23 @@ void pcie_aspm_init_link_state(struct pci_dev *pdev)
* update through pcie_aspm_cap_init().
*/
pcie_aspm_cap_init(link, blacklist);
- pcie_config_aspm_path(link);
/* Setup initial Clock PM state */
pcie_clkpm_cap_init(link, blacklist);
- pcie_set_clkpm(link, policy_to_clkpm_state(link));
+
+ /*
+ * At this stage drivers haven't had an opportunity to change the
+ * link policy setting. Enabling ASPM on broken hardware can cripple
+ * it even before the driver has had a chance to disable ASPM, so
+ * default to a safe level right now. If we're enabling ASPM beyond
+ * the BIOS's expectation, we'll do so once pci_enable_device() is
+ * called.
+ */
+ if (aspm_policy != POLICY_POWERSAVE) {
+ pcie_config_aspm_path(link);
+ pcie_set_clkpm(link, policy_to_clkpm_state(link));
+ }
+
unlock:
mutex_unlock(&aspm_lock);
out:
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index f4adba2d1dd..12625d90f8b 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -163,9 +163,16 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
struct resource *res, unsigned int pos)
{
u32 l, sz, mask;
+ u16 orig_cmd;
mask = type ? PCI_ROM_ADDRESS_MASK : ~0;
+ if (!dev->mmio_always_on) {
+ pci_read_config_word(dev, PCI_COMMAND, &orig_cmd);
+ pci_write_config_word(dev, PCI_COMMAND,
+ orig_cmd & ~(PCI_COMMAND_MEMORY | PCI_COMMAND_IO));
+ }
+
res->name = pci_name(dev);
pci_read_config_dword(dev, pos, &l);
@@ -173,6 +180,9 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
pci_read_config_dword(dev, pos, &sz);
pci_write_config_dword(dev, pos, l);
+ if (!dev->mmio_always_on)
+ pci_write_config_word(dev, PCI_COMMAND, orig_cmd);
+
/*
* All bits set in sz means the device isn't working properly.
* If the BAR isn't implemented, all bits must be 0. If it's a
diff --git a/drivers/pci/proc.c b/drivers/pci/proc.c
index 449e890267a..01f0306525a 100644
--- a/drivers/pci/proc.c
+++ b/drivers/pci/proc.c
@@ -431,8 +431,6 @@ int pci_proc_detach_device(struct pci_dev *dev)
struct proc_dir_entry *e;
if ((e = dev->procent)) {
- if (atomic_read(&e->count) > 1)
- return -EBUSY;
remove_proc_entry(e->name, dev->bus->procdir);
dev->procent = NULL;
}
@@ -485,9 +483,9 @@ static int __init pci_proc_init(void)
proc_create("devices", 0, proc_bus_pci_dir,
&proc_bus_pci_dev_operations);
proc_initialized = 1;
- while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
+ for_each_pci_dev(dev)
pci_proc_attach_device(dev);
- }
+
return 0;
}
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index a0c20d9e839..89ed181cd90 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -91,6 +91,19 @@ static void __devinit quirk_resource_alignment(struct pci_dev *dev)
}
DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, quirk_resource_alignment);
+/*
+ * Decoding should be disabled for a PCI device during BAR sizing to avoid
+ * conflict. But doing so may cause problems on host bridge and perhaps other
+ * key system devices. For devices that need to have mmio decoding always-on,
+ * we need to set the dev->mmio_always_on bit.
+ */
+static void __devinit quirk_mmio_always_on(struct pci_dev *dev)
+{
+ if ((dev->class >> 8) == PCI_CLASS_BRIDGE_HOST)
+ dev->mmio_always_on = 1;
+}
+DECLARE_PCI_FIXUP_EARLY(PCI_ANY_ID, PCI_ANY_ID, quirk_mmio_always_on);
+
/* The Mellanox Tavor device gives false positive parity errors
* Mark this device with a broken_parity_status, to allow
* PCI scanning code to "skip" this now blacklisted device.
@@ -2121,6 +2134,7 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_RS480, quirk_disabl
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_VT3336, quirk_disable_all_msi);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_VT3351, quirk_disable_all_msi);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_VT3364, quirk_disable_all_msi);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8380_0, quirk_disable_all_msi);
/* Disable MSI on chipsets that are known to not support it */
static void __devinit quirk_disable_msi(struct pci_dev *dev)
@@ -2132,12 +2146,29 @@ static void __devinit quirk_disable_msi(struct pci_dev *dev)
}
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8131_BRIDGE, quirk_disable_msi);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x9602, quirk_disable_msi);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ASUSTEK, 0x9602, quirk_disable_msi);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AI, 0x9602, quirk_disable_msi);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, 0xa238, quirk_disable_msi);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x5a3f, quirk_disable_msi);
+/*
+ * The APC bridge device in AMD 780 family northbridges has some random
+ * OEM subsystem ID in its vendor ID register (erratum 18), so instead
+ * we use the possible vendor/device IDs of the host bridge for the
+ * declared quirk, and search for the APC bridge by slot number.
+ */
+static void __devinit quirk_amd_780_apc_msi(struct pci_dev *host_bridge)
+{
+ struct pci_dev *apc_bridge;
+
+ apc_bridge = pci_get_slot(host_bridge->bus, PCI_DEVFN(1, 0));
+ if (apc_bridge) {
+ if (apc_bridge->device == 0x9602)
+ quirk_disable_msi(apc_bridge);
+ pci_dev_put(apc_bridge);
+ }
+}
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x9600, quirk_amd_780_apc_msi);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x9601, quirk_amd_780_apc_msi);
+
/* Go through the list of Hypertransport capabilities and
* return 1 if a HT MSI capability is found and enabled */
static int __devinit msi_ht_cap_enabled(struct pci_dev *dev)
@@ -2396,6 +2427,9 @@ static void __devinit __nv_msi_ht_cap_quirk(struct pci_dev *dev, int all)
int pos;
int found;
+ if (!pci_msi_enabled())
+ return;
+
/* check if there is HT MSI cap or enabled on this device */
found = ht_check_msi_mapping(dev);
@@ -2748,7 +2782,7 @@ static int __init pci_apply_final_quirks(void)
printk(KERN_DEBUG "PCI: CLS %u bytes\n",
pci_cache_line_size << 2);
- while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
+ for_each_pci_dev(dev) {
pci_fixup_device(pci_fixup_final, dev);
/*
* If arch hasn't set it explicitly yet, use the CLS
diff --git a/drivers/pci/search.c b/drivers/pci/search.c
index 20d03f77228..9d75dc8ca60 100644
--- a/drivers/pci/search.c
+++ b/drivers/pci/search.c
@@ -169,7 +169,7 @@ struct pci_dev *pci_get_domain_bus_and_slot(int domain, unsigned int bus,
{
struct pci_dev *dev = NULL;
- while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
+ for_each_pci_dev(dev) {
if (pci_domain_nr(dev->bus) == domain &&
(dev->bus->number == bus && dev->devfn == devfn))
return dev;
diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index 19b111383f6..66cb8f4cc5f 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -874,19 +874,16 @@ void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge)
again:
pci_bus_size_bridges(parent);
__pci_bridge_assign_resources(bridge, &head);
- retval = pci_reenable_device(bridge);
- pci_set_master(bridge);
- pci_enable_bridges(parent);
tried_times++;
if (!head.next)
- return;
+ goto enable_all;
if (tried_times >= 2) {
/* still fail, don't need to try more */
free_failed_list(&head);
- return;
+ goto enable_all;
}
printk(KERN_DEBUG "PCI: No. %d try to assign unassigned res\n",
@@ -919,5 +916,10 @@ again:
free_failed_list(&head);
goto again;
+
+enable_all:
+ retval = pci_reenable_device(bridge);
+ pci_set_master(bridge);
+ pci_enable_bridges(parent);
}
EXPORT_SYMBOL_GPL(pci_assign_unassigned_bridge_resources);
diff --git a/drivers/pci/setup-irq.c b/drivers/pci/setup-irq.c
index aa795fd428d..eec9738f349 100644
--- a/drivers/pci/setup-irq.c
+++ b/drivers/pci/setup-irq.c
@@ -59,7 +59,6 @@ pci_fixup_irqs(u8 (*swizzle)(struct pci_dev *, u8 *),
int (*map_irq)(struct pci_dev *, u8, u8))
{
struct pci_dev *dev = NULL;
- while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
+ for_each_pci_dev(dev)
pdev_fixup_irq(dev, swizzle, map_irq);
- }
}