drm/amdgpu: add amdgpu_gtt_node_to_byte_offset helper

Having a helper avoids code duplication.

Signed-off-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
index 871388b86503ed7194b0736a8fbe616c77711cd7..c43f352df95313d97180d5f33c66ae3310f3b4a6 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
@@ -220,6 +220,14 @@ static inline u64 amdgpu_compute_gart_address(struct amdgpu_gmc *gmc,
        return gmc->gart_start + entity->gart_window_offs[index];
 }
 
+/**
+ * amdgpu_gtt_node_to_byte_offset() - Returns a byte offset of a gtt node
+ */
+static inline u64 amdgpu_gtt_node_to_byte_offset(const struct drm_mm_node *gtt_node)
+{
+       return gtt_node->start * (u64)PAGE_SIZE;
+}
+
 void amdgpu_ttm_tt_set_user_pages(struct ttm_tt *ttm, struct amdgpu_hmm_range *range);
 int amdgpu_ttm_tt_get_userptr(const struct ttm_buffer_object *tbo,
                              uint64_t *user_addr);