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PCI: Add a REBAR size quirk for Sapphire RX 5600 XT Pulse 

RX 5600 XT Pulse advertises support for BAR 0 being 256MB, 512MB,
or 1GB, but it also supports 2GB, 4GB, and 8GB. Add a rebar
size quirk so that the BAR 0 is big enough to cover complete VARM.

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patchwork.kernel.org/project/dri-devel/patch/20210107175017.15893-5-nirmoy.das@amd.com
This commit is contained in:
Nirmoy Das 2021-01-07 12:26:55 +01:00 committed by Christian König
parent 192f1bf755
commit 907830b0fc
1 changed files with 8 additions and 1 deletions
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9
drivers/pci/pci.c
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@ -3603,7 +3603,14 @@ u32 pci_rebar_get_possible_sizes(struct pci_dev *pdev, int bar)
return 0;
pci_read_config_dword(pdev, pos + PCI_REBAR_CAP, &cap);
return (cap & PCI_REBAR_CAP_SIZES) >> 4;
cap &= PCI_REBAR_CAP_SIZES;
/* Sapphire RX 5600 XT Pulse has an invalid cap dword for BAR 0 */
if (pdev->vendor == PCI_VENDOR_ID_ATI && pdev->device == 0x731f &&
bar == 0 && cap == 0x7000)
cap = 0x3f000;
return cap >> 4;
}
EXPORT_SYMBOL(pci_rebar_get_possible_sizes);