drm/amdkfd: CRIU export BOs as prime dmabuf objects

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KFD buffer objects do not associate a GEM handle with them so cannot
directly be used with libdrm to initiate a system dma (sDMA) operation
to speedup the checkpoint and restore operation so export them as dmabuf
objects and use with libdrm helper (amdgpu_bo_import) to further process
the sdma command submissions.

With sDMA, we see huge improvement in checkpoint and restore operations
compared to the generic pci based access via host data path.

Suggested-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@amd.com>
Signed-off-by: David Yat Sin <david.yatsin@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Rajneesh Bhardwaj 2021-06-29 18:30:36 -04:00 • committed by Alex Deucher

parent bef153b70c

commit be072b06c7

1 changed files with 69 additions and 2 deletions

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drivers/gpu/drm/amd/amdkfd/kfd_chardev.c

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