Edgar Merger reports that the AMD Raven GPU does not work reliably on his system when the IOMMU is enabled:
| [drm:amdgpu_job_timedout [amdgpu]] *ERROR* ring gfx timeout, signaled seq=1, emitted seq=3 | [...] | amdgpu 0000:0b:00.0: GPU reset begin! | AMD-Vi: Completion-Wait loop timed out | iommu ivhd0: AMD-Vi: Event logged [IOTLB_INV_TIMEOUT device=0b:00.0 address=0x38edc0970] This is indicative of a hardware/platform configuration issue so, since disabling ATS has been shown to resolve the problem, add a quirk to match this particular device while Edgar follows-up with AMD for more information. Cc: Bjorn Helgaas <[email protected]> Cc: Alex Deucher <[email protected]> Reported-by: Edgar Merger <[email protected]> Suggested-by: Joerg Roedel <[email protected]> Link: https://lore.kernel.org/linux-iommu/mwhpr10mb1310f042a30661d4158520b589...@mwhpr10mb1310.namprd10.prod.outlook.com Signed-off-by: Will Deacon <[email protected]> --- Hi all, Since Joerg is away at the moment, I'm posting this to try to make some progress with the thread in the Link: tag. Cheers, Will drivers/pci/quirks.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index f70692ac79c5..3911b0ec57ba 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -5176,6 +5176,8 @@ 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 */ -- 2.29.2.454.gaff20da3a2-goog
