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MSI: Cleanup existing MSI quirks

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Move MSI quirks in CONFIG_PCI_MSI, document why the serverworks quirk
does not simply set PCI_BUS_FLAGS_NO_MSI, and create a generic quirk
for other chipsets where setting PCI_BUS_FLAGS_NO_MSI is fine.

Signed-off-by: Brice Goglin <brice@myri.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Brice Goglin 2006-08-31 01:54:56 -04:00 committed by Greg Kroah-Hartman
parent d33b6fba2c
commit 3f79e107f7
2 changed files with 31 additions and 16 deletions
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2
drivers/pci/pci.h
View file

@ -42,7 +42,7 @@ extern void pci_remove_legacy_files(struct pci_bus *bus);
/* Lock for read/write access to pci device and bus lists */
extern struct rw_semaphore pci_bus_sem;
#ifdef CONFIG_X86_IO_APIC
#ifdef CONFIG_PCI_MSI
extern int pci_msi_quirk;
#else
#define pci_msi_quirk 0

45
drivers/pci/quirks.c
View file

@ -577,8 +577,6 @@ static void __init quirk_ioapic_rmw(struct pci_dev *dev)
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SI, PCI_ANY_ID, quirk_ioapic_rmw );
int pci_msi_quirk;
#define AMD8131_revA0 0x01
#define AMD8131_revB0 0x11
#define AMD8131_MISC 0x40
@ -587,12 +585,6 @@ static void __init quirk_amd_8131_ioapic(struct pci_dev *dev)
{
unsigned char revid, tmp;
if (dev->subordinate) {
printk(KERN_WARNING "PCI: MSI quirk detected. "
"PCI_BUS_FLAGS_NO_MSI set for subordinate bus.\n");
dev->subordinate->bus_flags |= PCI_BUS_FLAGS_NO_MSI;
}
if (nr_ioapics == 0)
return;
@ -605,13 +597,6 @@ static void __init quirk_amd_8131_ioapic(struct pci_dev *dev)
}
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8131_BRIDGE, quirk_amd_8131_ioapic);
static void __init quirk_svw_msi(struct pci_dev *dev)
{
pci_msi_quirk = 1;
printk(KERN_WARNING "PCI: MSI quirk detected. pci_msi_quirk set.\n");
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_GCNB_LE, quirk_svw_msi );
#endif /* CONFIG_X86_IO_APIC */
@ -1690,6 +1675,36 @@ static void __devinit quirk_nvidia_ck804_pcie_aer_ext_cap(struct pci_dev *dev)
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_CK804_PCIE,
quirk_nvidia_ck804_pcie_aer_ext_cap);
#ifdef CONFIG_PCI_MSI
/* To disable MSI globally */
int pci_msi_quirk;
/* The Serverworks PCI-X chipset does not support MSI. We cannot easily rely
* on setting PCI_BUS_FLAGS_NO_MSI in its bus flags because there are actually
* some other busses controlled by the chipset even if Linux is not aware of it.
* Instead of setting the flag on all busses in the machine, simply disable MSI
* globally.
*/
static void __init quirk_svw_msi(struct pci_dev *dev)
{
pci_msi_quirk = 1;
printk(KERN_WARNING "PCI: MSI quirk detected. pci_msi_quirk set.\n");
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_GCNB_LE, quirk_svw_msi);
/* Disable MSI on chipsets that are known to not support it */
static void __devinit quirk_disable_msi(struct pci_dev *dev)
{
if (dev->subordinate) {
printk(KERN_WARNING "PCI: MSI quirk detected. "
"PCI_BUS_FLAGS_NO_MSI set for %s subordinate bus.\n",
pci_name(dev));
dev->subordinate->bus_flags |= PCI_BUS_FLAGS_NO_MSI;
}
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8131_BRIDGE, quirk_disable_msi);
#endif /* CONFIG_PCI_MSI */
EXPORT_SYMBOL(pcie_mch_quirk);
#ifdef CONFIG_HOTPLUG
EXPORT_SYMBOL(pci_fixup_device);