diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 28 |
1 files changed, 24 insertions, 4 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c index 979855190031..f386b0d256d2 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c @@ -2083,8 +2083,21 @@ int amdgpu_amdkfd_gpuvm_sync_memory( return ret; } -int amdgpu_amdkfd_gpuvm_map_gtt_bo_to_kernel(struct amdgpu_device *adev, - struct kgd_mem *mem, void **kptr, uint64_t *size) +/** amdgpu_amdkfd_gpuvm_map_gtt_bo_to_kernel() - Map a GTT BO for kernel CPU access + * + * @mem: Buffer object to be mapped for CPU access + * @kptr[out]: pointer in kernel CPU address space + * @size[out]: size of the buffer + * + * Pins the BO and maps it for kernel CPU access. The eviction fence is removed + * from the BO, since pinned BOs cannot be evicted. The bo must remain on the + * validate_list, so the GPU mapping can be restored after a page table was + * evicted. + * + * Return: 0 on success, error code on failure + */ +int amdgpu_amdkfd_gpuvm_map_gtt_bo_to_kernel(struct kgd_mem *mem, + void **kptr, uint64_t *size) { int ret; struct amdgpu_bo *bo = mem->bo; @@ -2135,8 +2148,15 @@ bo_reserve_failed: return ret; } -void amdgpu_amdkfd_gpuvm_unmap_gtt_bo_from_kernel(struct amdgpu_device *adev, - struct kgd_mem *mem) +/** amdgpu_amdkfd_gpuvm_map_gtt_bo_to_kernel() - Unmap a GTT BO for kernel CPU access + * + * @mem: Buffer object to be unmapped for CPU access + * + * Removes the kernel CPU mapping and unpins the BO. It does not restore the + * eviction fence, so this function should only be used for cleanup before the + * BO is destroyed. + */ +void amdgpu_amdkfd_gpuvm_unmap_gtt_bo_from_kernel(struct kgd_mem *mem) { struct amdgpu_bo *bo = mem->bo; |