Commit a2da5d8c authored by Alex Deucher's avatar Alex Deucher Committed by Bjorn Helgaas
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PCI: Mark AMD Raven iGPU ATS as broken in some platforms 

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: default avatarEdgar Merger <Edgar.Merger@emerson.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
parent f8394f23

drivers/pci/quirks.c

+14 −0
Original line number Diff line number Diff line
@@ -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 */

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