1 files changed, 21 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
index 546f77cb7882..3bee13344065 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
@@ -196,6 +196,27 @@ static inline bool amdgpu_bo_gpu_accessible(struct amdgpu_bo *bo)
 }
 
 /**
+ * amdgpu_bo_in_cpu_visible_vram - check if BO is (partly) in visible VRAM
+ */
+static inline bool amdgpu_bo_in_cpu_visible_vram(struct amdgpu_bo *bo)
+{
+        struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
+        unsigned fpfn = adev->gmc.visible_vram_size >> PAGE_SHIFT;
+        struct drm_mm_node *node = bo->tbo.mem.mm_node;
+        unsigned long pages_left;
+
+        if (bo->tbo.mem.mem_type != TTM_PL_VRAM)
+                return false;
+
+        for (pages_left = bo->tbo.mem.num_pages; pages_left;
+             pages_left -= node->size, node++)
+                if (node->start < fpfn)
+                        return true;
+
+        return false;
+}
+
+/**
  * amdgpu_bo_explicit_sync - return whether the bo is explicitly synced
  */
 static inline bool amdgpu_bo_explicit_sync(struct amdgpu_bo *bo)