drm/amdgpu: add more warning to amdgpu_bo_offset

Warn when we try to get the address and the BO isn't locked or reserved.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 18 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index 93573586e2de..67de19c46ddb 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -737,3 +737,21 @@ void amdgpu_bo_fence(struct amdgpu_bo *bo, struct fence *fence,
         else
                 reservation_object_add_excl_fence(resv, fence);
 }
+
+/**
+ * amdgpu_bo_gpu_offset - return GPU offset of bo
+ * @bo: amdgpu object for which we query the offset
+ *
+ * Returns current GPU offset of the object.
+ *
+ * Note: object should either be pinned or reserved when calling this
+ * function, it might be useful to add check for this for debugging.
+ */
+u64 amdgpu_bo_gpu_offset(struct amdgpu_bo *bo)
+{
+        WARN_ON_ONCE(bo->tbo.mem.mem_type == TTM_PL_SYSTEM);
+        WARN_ON_ONCE(!ww_mutex_is_locked(&bo->tbo.resv->lock) &&
+                     !bo->pin_count);
+
+        return bo->tbo.offset;
+}