PCI: SR-IOV quirk for Intel 82576 NIC

#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,

			  struct pci_fixup *end)

{