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[PATCH] PCI: 6700/6702PXH quirk

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On the 6700/6702 PXH part, a MSI may get corrupted if an ACPI hotplug
driver and SHPC driver in MSI mode are used together.

This patch will prevent MSI from being enabled for the SHPC as part of
an early pci quirk, as well as on any pci device which sets the no_msi
bit.

Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Kristen Accardi 2005-08-16 15:15:58 -07:00 committed by Linus Torvalds
parent 208f3d6175
commit 4602b88d97
5 changed files with 33 additions and 3 deletions
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5
drivers/pci/msi.c
View File

@ -453,7 +453,7 @@ static void enable_msi_mode(struct pci_dev *dev, int pos, int type)
}
}
static void disable_msi_mode(struct pci_dev *dev, int pos, int type)
void disable_msi_mode(struct pci_dev *dev, int pos, int type)
{
u16 control;
@ -699,6 +699,9 @@ int pci_enable_msi(struct pci_dev* dev)
if (!pci_msi_enable || !dev)
return status;
if (dev->no_msi)
return status;
temp = dev->irq;
if ((status = msi_init()) < 0)

2
drivers/pci/pci.h
View File

@ -46,7 +46,7 @@ extern int pci_msi_quirk;
#else
#define pci_msi_quirk 0
#endif
void disable_msi_mode(struct pci_dev *dev, int pos, int type);
extern int pcie_mch_quirk;
extern struct device_attribute pci_dev_attrs[];
extern struct class_device_attribute class_device_attr_cpuaffinity;

21
drivers/pci/quirks.c
View File

@ -1291,6 +1291,27 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7520_MCH, quir
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7320_MCH, quirk_pcie_mch );
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7525_MCH, quirk_pcie_mch );
/*
* It's possible for the MSI to get corrupted if shpc and acpi
* are used together on certain PXH-based systems.
*/
static void __devinit quirk_pcie_pxh(struct pci_dev *dev)
{
disable_msi_mode(dev, pci_find_capability(dev, PCI_CAP_ID_MSI),
PCI_CAP_ID_MSI);
dev->no_msi = 1;
printk(KERN_WARNING "PCI: PXH quirk detected, "
"disabling MSI for SHPC device\n");
}
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PXHD_0, quirk_pcie_pxh);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PXHD_1, quirk_pcie_pxh);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PXH_0, quirk_pcie_pxh);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PXH_1, quirk_pcie_pxh);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PXHV, quirk_pcie_pxh);
static void __devinit quirk_netmos(struct pci_dev *dev)
{
unsigned int num_parallel = (dev->subsystem_device & 0xf0) >> 4;

3
include/linux/pci.h
View File

@ -556,7 +556,8 @@ struct pci_dev {
/* keep track of device state */
unsigned int is_enabled:1; /* pci_enable_device has been called */
unsigned int is_busmaster:1; /* device is busmaster */
unsigned int no_msi:1; /* device may not use msi */
u32 saved_config_space[16]; /* config space saved at suspend time */
struct bin_attribute *rom_attr; /* attribute descriptor for sysfs ROM entry */
int rom_attr_enabled; /* has display of the rom attribute been enabled? */

5
include/linux/pci_ids.h
View File

@ -2281,6 +2281,11 @@
#define PCI_VENDOR_ID_INTEL 0x8086
#define PCI_DEVICE_ID_INTEL_EESSC 0x0008
#define PCI_DEVICE_ID_INTEL_21145 0x0039
#define PCI_DEVICE_ID_INTEL_PXHD_0 0x0320
#define PCI_DEVICE_ID_INTEL_PXHD_1 0x0321
#define PCI_DEVICE_ID_INTEL_PXH_0 0x0329
#define PCI_DEVICE_ID_INTEL_PXH_1 0x032A
#define PCI_DEVICE_ID_INTEL_PXHV 0x032C
#define PCI_DEVICE_ID_INTEL_82375 0x0482
#define PCI_DEVICE_ID_INTEL_82424 0x0483
#define PCI_DEVICE_ID_INTEL_82378 0x0484