drm/amdgpu: add shadow flag V2

Indicate if need to sync between bo and shadow, where sync to where.
V2:
Rename to backup_shadow

Signed-off-by: Chunming Zhou <David1.Zhou@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 26f6028bb72b..d18ae01bd339 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -480,6 +480,12 @@ struct amdgpu_bo_va {
 
 #define AMDGPU_GEM_DOMAIN_MAX           0x3
 
+enum amdgpu_bo_shadow {
+        AMDGPU_BO_SHADOW_TO_NONE = 0,
+        AMDGPU_BO_SHADOW_TO_PARENT,
+        AMDGPU_BO_SHADOW_TO_SHADOW,
+};
+
 struct amdgpu_bo {
         /* Protected by gem.mutex */
         struct list_head                list;
@@ -506,6 +512,8 @@ struct amdgpu_bo {
         struct drm_gem_object           gem_base;
         struct amdgpu_bo                *parent;
         struct amdgpu_bo                *shadow;
+        /* indicate if need to sync between bo and shadow */
+        enum amdgpu_bo_shadow           backup_shadow;
 
         struct ttm_bo_kmap_obj          dma_buf_vmap;
         struct amdgpu_mn                *mn;