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PCI: SR-IOV quirk for Intel 82576 NIC

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If BIOS doesn't allocate resources for the SR-IOV BARs, zero the Flash
BAR and program the SR-IOV BARs to use the old Flash Memory Space.

Please refer to Intel 82576 Gigabit Ethernet Controller Datasheet
section 7.9.2.14.2 for details.
http://download.intel.com/design/network/datashts/82576_Datasheet.pdf

Signed-off-by: Yu Zhao <yu.zhao@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Yu Zhao
2009-04-03 15:18:11 +08:00
committed by Jesse Barnes
parent 0221c81b1b
commit 7eb93b175d
1 changed files with 48 additions and 0 deletions
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48
drivers/pci/quirks.c
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@@ -2411,6 +2411,54 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x4375,
#endif /* CONFIG_PCI_MSI */ #endif /* CONFIG_PCI_MSI */
#ifdef CONFIG_PCI_IOV
/*
* For Intel 82576 SR-IOV NIC, if BIOS doesn't allocate resources for the
* SR-IOV BARs, zero the Flash BAR and program the SR-IOV BARs to use the
* old Flash Memory Space.
*/
static void __devinit quirk_i82576_sriov(struct pci_dev *dev)
{
int pos, flags;
u32 bar, start, size;
if (PAGE_SIZE > 0x10000)
return;
flags = pci_resource_flags(dev, 0);
if ((flags & PCI_BASE_ADDRESS_SPACE) !=
PCI_BASE_ADDRESS_SPACE_MEMORY ||
(flags & PCI_BASE_ADDRESS_MEM_TYPE_MASK) !=
PCI_BASE_ADDRESS_MEM_TYPE_32)
return;
pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_SRIOV);
if (!pos)
return;
pci_read_config_dword(dev, pos + PCI_SRIOV_BAR, &bar);
if (bar & PCI_BASE_ADDRESS_MEM_MASK)
return;
start = pci_resource_start(dev, 1);
size = pci_resource_len(dev, 1);
if (!start || size != 0x400000 || start & (size - 1))
return;
pci_resource_flags(dev, 1) = 0;
pci_write_config_dword(dev, PCI_BASE_ADDRESS_1, 0);
pci_write_config_dword(dev, pos + PCI_SRIOV_BAR, start);
pci_write_config_dword(dev, pos + PCI_SRIOV_BAR + 12, start + size / 2);
dev_info(&dev->dev, "use Flash Memory Space for SR-IOV BARs\n");
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x10c9, quirk_i82576_sriov);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x10e6, quirk_i82576_sriov);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x10e7, quirk_i82576_sriov);
#endif /* CONFIG_PCI_IOV */
static void pci_do_fixups(struct pci_dev *dev, struct pci_fixup *f, static void pci_do_fixups(struct pci_dev *dev, struct pci_fixup *f,
struct pci_fixup *end) struct pci_fixup *end)
{ {