From 0b6383a9a80acb08768da7d15370f4ad6456baba Mon Sep 17 00:00:00 2001 From: Nirmoy Das Date: Thu, 7 Jan 2021 12:26:55 +0100 Subject: [PATCH] PCI: Add a REBAR size quirk for Sapphire RX 5600 XT Pulse MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit [ 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 Signed-off-by: Nirmoy Das Acked-by: Bjorn Helgaas Link: https://patchwork.kernel.org/project/dri-devel/patch/20210107175017.15893-5-nirmoy.das@amd.com Signed-off-by: Sasha Levin --- 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 6427cbd..5c93450 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 &= 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; } /** -- 2.7.4