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Merge branches 'pci/enumeration', 'pci/hotplug', 'pci/resource' and 'pci/virtualization' into next 

* pci/enumeration:
  PCI: Generate uppercase hex for modalias var in uevent

* pci/hotplug:
  PCI: pciehp: Handle surprise add even if surprise removal isn't supported

* pci/resource:
  PCI: Fix infinite loop with ROM image of size 0

* pci/virtualization:
  PCI: Add Wellsburg (X99) to Intel PCH root port ACS quirk
  PCI: Add DMA alias quirk for Adaptec 3405
  PCI: Add ACS quirk for Emulex NICs
  PCI: Mark AMD/ATI VGA devices that don't reset on D3hot->D0 transition
  PCI: Add flag for devices that don't reset on D3hot->D0 transition
  PCI: Mark Atheros AR93xx to avoid bus reset
  PCI: Add flag for devices where we can't use bus reset
This commit is contained in:
Bjorn Helgaas 2015-01-27 15:34:20 -06:00
parent e315110657 145b3fe579 a93b506e26 16b036af31 78e883585d
commit 341f3a2bcf
6 changed files with 124 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/pci/hotplug/pciehp_ctrl.c
View File

@ -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;

2
drivers/pci/pci-driver.c
View File

@ -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),

42
drivers/pci/pci.c
View File

@ -3199,7 +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);
@ -3273,7 +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)
@ -3307,7 +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)
@ -3559,6 +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)
{
@ -3609,6 +3625,22 @@ static int pci_bus_trylock(struct pci_bus *bus)
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)
{
@ -3730,7 +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)
@ -3822,7 +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)

78
drivers/pci/quirks.c
View File

@ -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.
@ -3527,6 +3562,44 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_JMICRON,
PCI_DEVICE_ID_JMICRON_JMB388_ESD,
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
@ -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 }
};

7
drivers/pci/rom.c
View File

@ -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 */

4
include/linux/pci.h
View File

@ -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 {