diff options
Diffstat (limited to 'drivers/pci/quirks.c')
| -rw-r--r-- | drivers/pci/quirks.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 94a767fc13dc..ae1c793d7e4c 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -411,6 +411,48 @@ static void __init quirk_cardbus_legacy(struct pci_dev *dev) pci_write_config_dword(dev, PCI_CB_LEGACY_MODE_BASE, 0); } +/* + * The AMD io apic can hang the box when an apic irq is masked. + * We check all revs >= B0 (yet not in the pre production!) as the bug + * is currently marked NoFix + * + * We have multiple reports of hangs with this chipset that went away with + * noapic specified. For the moment we assume its the errata. We may be wrong + * of course. However the advice is demonstrably good even if so.. + */ + +static void __init quirk_amd_ioapic(struct pci_dev *dev) +{ + u8 rev; + + pci_read_config_byte(dev, PCI_REVISION_ID, &rev); + if(rev >= 0x02) + { + printk(KERN_WARNING "I/O APIC: AMD Errata #22 may be present. In the event of instability try\n"); + printk(KERN_WARNING " : booting with the \"noapic\" option.\n"); + } +} + +/* + * Following the PCI ordering rules is optional on the AMD762. I'm not + * sure what the designers were smoking but let's not inhale... + * + * To be fair to AMD, it follows the spec by default, its BIOS people + * who turn it off! + */ + +static void __init quirk_amd_ordering(struct pci_dev *dev) +{ + u32 pcic; + + pci_read_config_dword(dev, 0x42, &pcic); + if((pcic&2)==0) + { + pcic |= 2; + printk(KERN_WARNING "BIOS disabled PCI ordering compliance, so we enabled it again.\n"); + pci_write_config_dword(dev, 0x42, pcic); + } +} /* * The main table of quirks. @@ -463,6 +505,9 @@ static struct pci_fixup pci_fixups[] __initdata = { { PCI_FIXUP_FINAL, PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_5, quirk_via_irqpic }, { PCI_FIXUP_FINAL, PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_6, quirk_via_irqpic }, + { PCI_FIXUP_FINAL, PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_VIPER_7410, quirk_amd_ioapic }, + { PCI_FIXUP_FINAL, PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_FE_GATE_700C, quirk_amd_ordering }, + { 0 } }; |