drm/amdkfd: Ensure user queue buffers residency

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Add atomic queue_refcount to struct bo_va, return -EBUSY to fail unmap
BO from the GPU if the bo_va queue_refcount is not zero.

Create queue to increase the bo_va queue_refcount, destroy queue to
decrease the bo_va queue_refcount, to ensure the queue buffers mapped on
the GPU when queue is active.

Signed-off-by: Philip Yang <Philip.Yang@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehling@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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This commit is contained in:

Philip Yang 2024-06-20 12:31:36 -04:00 • committed by Alex Deucher

parent 22a9d5cbf8

commit 834368eab3

5 changed files with 49 additions and 9 deletions

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14

drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c

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6

drivers/gpu/drm/amd/amdgpu/amdgpu_object.h

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3

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

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1

drivers/gpu/drm/amd/amdkfd/kfd_priv.h

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34

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

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