RX 5600 XT Pulse advertises support for BAR0 being 256MB, 512MB,
or 1GB, but it also supports 2GB, 4GB, and 8GB. Add a rebar
size quirk so that CPU can fully access the BAR0.
Signed-off-by: Christian König <christian.koe...@amd.com>
Reported-by: kernel test robot <l...@intel.com>
Reported-by: Dan Carpenter <dan.carpen...@oracle.com>
Signed-off-by: Nirmoy Das <nirmoy....@amd.com>
---
drivers/pci/pci.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 16216186b51c..b061bbd4afb1 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -3577,7 +3577,14 @@ 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 = (cap & PCI_REBAR_CAP_SIZES) >> 4;
+
+ /* 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 == 0x700)
+ cap = 0x3f00;
+
+ return cap;
}
EXPORT_SYMBOL(pci_rebar_get_possible_sizes);
--
2.29.2
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