| From 3e728456b6375fa676433d135c11c3e74bead08e Mon Sep 17 00:00:00 2001 |
| From: Sasha Levin <sashal@kernel.org> |
| Date: Thu, 7 Jan 2021 12:26:55 +0100 |
| Subject: PCI: Add a REBAR size quirk for Sapphire RX 5600 XT Pulse |
| MIME-Version: 1.0 |
| Content-Type: text/plain; charset=UTF-8 |
| Content-Transfer-Encoding: 8bit |
| |
| From: Nirmoy Das <nirmoy.das@amd.com> |
| |
| [ 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 Kรถnig <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 |
| 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 790393d1e318..ba791165ed19 100644 |
| --- a/drivers/pci/pci.c |
| +++ b/drivers/pci/pci.c |
| @@ -3596,7 +3596,14 @@ 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; |
| } |
| |
| /** |
| -- |
| 2.30.1 |
| |
