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x86/PCI: Only enable a 64bit BAR on single-socket AMD Family 15h

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When we have a multi-socket system, each CPU core needs the same setup.
Since this is tricky to do in the fixup code, don't enable a 64bit BAR on
multi-socket systems for now.

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Christian König 2017-11-29 15:12:28 +01:00 committed by Bjorn Helgaas
parent 470195f82e
commit a19e269613
1 changed files with 15 additions and 5 deletions
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20
arch/x86/pci/fixup.c
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@ -665,6 +665,16 @@ static void pci_amd_enable_64bit_bar(struct pci_dev *dev)
unsigned i;
u32 base, limit, high;
struct resource *res, *conflict;
struct pci_dev *other;
/* Check that we are the only device of that type */
other = pci_get_device(dev->vendor, dev->device, NULL);
if (other != dev ||
(other = pci_get_device(dev->vendor, dev->device, other))) {
/* This is a multi-socket system, don't touch it for now */
pci_dev_put(other);
return;
}
for (i = 0; i < 8; i++) {
pci_read_config_dword(dev, AMD_141b_MMIO_BASE(i), &base);
@ -719,10 +729,10 @@ static void pci_amd_enable_64bit_bar(struct pci_dev *dev)
pci_bus_add_resource(dev->bus, res, 0);
}
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_AMD, 0x1401, pci_amd_enable_64bit_bar);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_AMD, 0x141b, pci_amd_enable_64bit_bar);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_AMD, 0x1571, pci_amd_enable_64bit_bar);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_AMD, 0x15b1, pci_amd_enable_64bit_bar);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_AMD, 0x1601, pci_amd_enable_64bit_bar);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x1401, pci_amd_enable_64bit_bar);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x141b, pci_amd_enable_64bit_bar);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x1571, pci_amd_enable_64bit_bar);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x15b1, pci_amd_enable_64bit_bar);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x1601, pci_amd_enable_64bit_bar);
#endif