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Commit 77e54793 authored by Nirmoy Das's avatar Nirmoy Das Committed by Greg Kroah-Hartman
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PCI: Add a REBAR size quirk for Sapphire RX 5600 XT Pulse 



[ 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: default avatarChristian König <christian.koenig@amd.com>
Signed-off-by: default avatarNirmoy Das <nirmoy.das@amd.com>
Acked-by: default avatarBjorn Helgaas <bhelgaas@google.com>
Link: https://patchwork.kernel.org/project/dri-devel/patch/20210107175017.15893-5-nirmoy.das@amd.com


Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 2fd58d8b

drivers/pci/pci.c

+8 −1
Original line number Diff line number Diff line
@@ -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;

}



/**