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PCI: Mark AMD Raven iGPU ATS as broken in some platforms

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Edgar reported [1] AMD Raven iGPU errors on several of his systems.  There
is no root cause.  Turn off ATS on these systems to avoid the issue.

[1] https://lore.kernel.org/linux-iommu/MWHPR10MB1310CDB6829DDCF5EA84A14689150@MWHPR10MB1310.namprd10.prod.outlook.com/

[bhelgaas: commit log]
Link: https://lore.kernel.org/r/MWHPR10MB131082779A86BE4CCCF190B789CB0@MWHPR10MB1310.namprd10.prod.outlook.com
Reported-by: Edgar Merger <Edgar.Merger@emerson.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Alex Deucher 2020-12-10 10:08:47 -06:00 committed by Bjorn Helgaas
parent f8394f232b
commit a2da5d8cc0
1 changed files with 14 additions and 0 deletions
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14
drivers/pci/quirks.c
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@ -5164,6 +5164,18 @@ static void quirk_amd_harvest_no_ats(struct pci_dev *pdev)
(pdev->device == 0x7340 && pdev->revision != 0xc5))
return;
if (pdev->device == 0x15d8) {
if (pdev->revision == 0xcf &&
pdev->subsystem_vendor == 0xea50 &&
(pdev->subsystem_device == 0xce19 ||
pdev->subsystem_device == 0xcc10 ||
pdev->subsystem_device == 0xcc08))
goto no_ats;
else
return;
}
no_ats:
pci_info(pdev, "disabling ATS\n");
pdev->ats_cap = 0;
}
@ -5176,6 +5188,8 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x6900, quirk_amd_harvest_no_ats);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x7312, quirk_amd_harvest_no_ats);
/* AMD Navi14 dGPU */
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x7340, quirk_amd_harvest_no_ats);
/* AMD Raven platform iGPU */
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x15d8, quirk_amd_harvest_no_ats);
#endif /* CONFIG_PCI_ATS */
/* Freescale PCIe doesn't support MSI in RC mode */