On 2018-06-06 04:44 PM, Christian König wrote: > Am 06.06.2018 um 16:12 schrieb Michel Dänzer: >> On 2018-06-06 03:33 PM, Gabriel C wrote: >>> 2018-06-06 14:19 GMT+02:00 Christian König <christian.koenig@xxxxxxx>: >>>> Am 06.06.2018 um 14:08 schrieb Gabriel C: >>>>> 2018-06-06 13:33 GMT+02:00 Christian König <christian.koenig@xxxxxxx>: >>>>>> Am 06.06.2018 um 13:28 schrieb Gabriel C: >> >>>>> http://ftp.frugalware.org/pub/other/people/crazy/radeon/dmesg-iommu-sr-iov-off.txt >>>>> >>>>> >>>>> http://ftp.frugalware.org/pub/other/people/crazy/radeon/dmesg-iommu-sr-iov-on.txt >>>>> >>>>> >>>>> Also nothing else changed in that setup just testing kernel 4.17. >>>> >>>> >>>> That has nothing TODO with the driver nor the original bug you >>>> reported. The >>>> problem is that SME is active and that is currently not supported at >>>> all >>>> with a that hardware. >>> >>> Ok .. so are we playing now kernel an AMD Hardware roulette on each >>> release ? >>> >>> SME was like this in kernel 4.16.x here and all worked. >> >> If that is true, again please bisect which commit broke it. >> >> All the reports I've seen before this indicated that at least amdgpu >> has never worked with SME (which BTW doesn't mean it's never going to >> work or that we don't want to support it, just that as far as we know >> it's currently not working). > > At least in theory it should work when we use the coherent DMA allocator. > > When that really worked before, so the most likely commit which broke > this is: > > commit fd5fd480dd8fe4910546e7b080b3ae345e57fe9f > Author: Chunming Zhou <david1.zhou@xxxxxxx> > Date: Fri Feb 9 10:44:09 2018 +0800 > > drm/amdgpu: only enable swiotlb alloc when need v2 > > get the max io mapping address of system memory to see if it is over > our card accessing range. > v2: move checking later > > Signed-off-by: Chunming Zhou <david1.zhou@xxxxxxx> > Reviewed-by: Monk Liu <monk.liu@xxxxxxx> > Reviewed-by: Christian König <christian.koenig@xxxxxxx> > Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx> > > Currently looking into how we could somehow improve this detection. I guess this could fit for Gabriel, but e.g. https://bugs.freedesktop.org/104437 says amdgpu was already broken with SME in 4.15, if not 4.14 (I suspect there was simply no SME support earlier). -- Earthling Michel Dänzer | http://www.amd.com Libre software enthusiast | Mesa and X developer _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
