drm/amdgpu: sync bo and shadow V3

Use shadow flag to judge which direction to sync.
V2:
Don't need bo pin, so remove it.

V3:
1. Split to two functions, one is backup_to_shadow, another is
restore_from_shadow.
2. Clean up previous shadow direction difinitions.

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, 64 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index 60acbd22174e..84990415a3dc 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -445,6 +445,70 @@ int amdgpu_bo_create(struct amdgpu_device *adev,
         return r;
 }
 
+int amdgpu_bo_backup_to_shadow(struct amdgpu_device *adev,
+                               struct amdgpu_ring *ring,
+                               struct amdgpu_bo *bo,
+                               struct reservation_object *resv,
+                               struct fence **fence,
+                               bool direct)
+
+{
+        struct amdgpu_bo *shadow = bo->shadow;
+        uint64_t bo_addr, shadow_addr;
+        int r;
+
+        if (!shadow)
+                return -EINVAL;
+
+        bo_addr = amdgpu_bo_gpu_offset(bo);
+        shadow_addr = amdgpu_bo_gpu_offset(bo->shadow);
+
+        r = reservation_object_reserve_shared(bo->tbo.resv);
+        if (r)
+                goto err;
+
+        r = amdgpu_copy_buffer(ring, bo_addr, shadow_addr,
+                               amdgpu_bo_size(bo), resv, fence,
+                               direct);
+        if (!r)
+                amdgpu_bo_fence(bo, *fence, true);
+
+err:
+        return r;
+}
+
+int amdgpu_bo_restore_from_shadow(struct amdgpu_device *adev,
+                                  struct amdgpu_ring *ring,
+                                  struct amdgpu_bo *bo,
+                                  struct reservation_object *resv,
+                                  struct fence **fence,
+                                  bool direct)
+
+{
+        struct amdgpu_bo *shadow = bo->shadow;
+        uint64_t bo_addr, shadow_addr;
+        int r;
+
+        if (!shadow)
+                return -EINVAL;
+
+        bo_addr = amdgpu_bo_gpu_offset(bo);
+        shadow_addr = amdgpu_bo_gpu_offset(bo->shadow);
+
+        r = reservation_object_reserve_shared(bo->tbo.resv);
+        if (r)
+                goto err;
+
+        r = amdgpu_copy_buffer(ring, shadow_addr, bo_addr,
+                               amdgpu_bo_size(bo), resv, fence,
+                               direct);
+        if (!r)
+                amdgpu_bo_fence(bo, *fence, true);
+
+err:
+        return r;
+}
+
 int amdgpu_bo_kmap(struct amdgpu_bo *bo, void **ptr)
 {
         bool is_iomem;