drm/amdgpu: Add GPUVM memory management functions for KFD

v2:
* Removed unused flags from struct kgd_mem
* Updated some comments
* Added a check to unmap_memory_from_gpu whether BO was mapped

v3: add mutex_destroy in relevant places

Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Acked-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 5fcb3488a595..c2fae04d769a 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -259,6 +259,13 @@ static int amdgpu_verify_access(struct ttm_buffer_object *bo, struct file *filp)
 {
         struct amdgpu_bo *abo = ttm_to_amdgpu_bo(bo);
 
+        /*
+         * Don't verify access for KFD BOs. They don't have a GEM
+         * object associated with them.
+         */
+        if (abo->kfd_bo)
+                return 0;
+
         if (amdgpu_ttm_tt_get_usermm(bo->ttm))
                 return -EPERM;
         return drm_vma_node_verify_access(&abo->gem_base.vma_node,