[PATCH 4.19 32/52] PCI: Add a REBAR size quirk for Sapphire RX 5600 XT Pulse
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2021-03-05 12:39:16
Also in:
lkml
Subsystem:
pci subsystem, the rest · Maintainers:
Bjorn Helgaas, Linus Torvalds
From: Nirmoy Das <redacted> [ Upstream commit 907830b0fc9e374d00f3c83de5e426157b482c01 ] 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 <redacted> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Link: https://patchwork.kernel.org/project/dri-devel/patch/20210107175017.15893-5-nirmoy.das@amd.com Signed-off-by: Sasha Levin <sashal@kernel.org> --- 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 cd628dd73719..83fda1987d1f 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c@@ -3361,7 +3361,14 @@ 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; } /**
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2.30.1