On Mon, Nov 23, 2020 at 09:04:14PM +0000, Deucher, Alexander wrote: > [AMD Public Use] > > > -----Original Message----- > > From: Will Deacon <will@xxxxxxxxxx> > > Sent: Monday, November 23, 2020 8:44 AM > > To: linux-kernel@xxxxxxxxxxxxxxx > > Cc: linux-pci@xxxxxxxxxxxxxxx; iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx; Will > > Deacon <will@xxxxxxxxxx>; Bjorn Helgaas <bhelgaas@xxxxxxxxxx>; > > Deucher, Alexander <Alexander.Deucher@xxxxxxx>; Edgar Merger > > <Edgar.Merger@xxxxxxxxxxx>; Joerg Roedel <jroedel@xxxxxxx> > > Subject: [PATCH] PCI: Mark AMD Raven iGPU ATS as broken > > > > 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 <bhelgaas@xxxxxxxxxx> > > Cc: Alex Deucher <alexander.deucher@xxxxxxx> > > Reported-by: Edgar Merger <Edgar.Merger@xxxxxxxxxxx> > > Suggested-by: Joerg Roedel <jroedel@xxxxxxx> > > Link: > > https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Flore. > > kernel.org%2Flinux- > > iommu%2FMWHPR10MB1310F042A30661D4158520B589FC0%40MWHPR10M > > B1310.namprd10.prod.outlook.com&data=04%7C01%7Calexander.deuc > > her%40amd.com%7C1a883fe14d0c408e7d9508d88fb5df4e%7C3dd8961fe488 > > 4e608e11a82d994e183d%7C0%7C0%7C637417358593629699%7CUnknown%7 > > CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwi > > LCJXVCI6Mn0%3D%7C1000&sdata=TMgKldWzsX8XZ0l7q3%2BszDWXQJJ > > LOUfX5oGaoLN8n%2B8%3D&reserved=0 > > Signed-off-by: Will Deacon <will@xxxxxxxxxx> > > --- > > > > 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. > > + Felix > > What system is this? Can you provide more details? Does a sbios update > fix this? Disabling ATS for all Ravens will break GPU compute for a lot > of people. I'd prefer to just black list this particular system (e.g., > just SSIDs or revision) if possible. Cheers, Alex. I'll have to defer to Edgar for the details, as my understanding from the original thread over at: https://lore.kernel.org/linux-iommu/MWHPR10MB1310CDB6829DDCF5EA84A14689150@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx/ is that this is a board developed by his company. Edgar -- please can you answer Alex's questions? Will
