Sorry for the spam. I mis-spelled the amd-gfx list on the To: line of
this patch series. Please ignore this and see the patch series I sent a
minute later.
Regards,
Felix
On 2021-04-14 2:46 a.m., Felix Kuehling wrote:
This patch series fixes DMA-mappings of system memory (GTT and userptr)
for KFD running on multi-GPU systems with IOMMU enabled. One SG-BO per
GPU is needed to maintain the DMA mappings of each BO.
I ran into some reservation issues when unmapping or freeing DMA-buf
imports. There are a few FIXME comments in this patch series where I'm
hoping for some expert advice. Patches 8 and 9 are some related fixes
in TTM and amdgpu_ttm. I'm pretty sure patch 9 is not the right way to
do this.
Felix Kuehling (9):
drm/amdgpu: Rename kfd_bo_va_list to kfd_mem_attachment
drm/amdgpu: Keep a bo-reference per-attachment
drm/amdgpu: Simplify AQL queue mapping
drm/amdgpu: Add multi-GPU DMA mapping helpers
drm/amdgpu: DMA map/unmap when updating GPU mappings
drm/amdgpu: Move kfd_mem_attach outside reservation
drm/amdgpu: Add DMA mapping of GTT BOs
drm/ttm: Don't count pages in SG BOs against pages_limit
drm/amdgpu: Lock the attached dmabuf in unpopulate
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h | 18 +-
.../gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 535 ++++++++++++------
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 13 +
drivers/gpu/drm/ttm/ttm_tt.c | 27 +-
4 files changed, 420 insertions(+), 173 deletions(-)
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