[PATCH 10/10] drm/amdgpu: add backup condition for vm

[David1.Zhou@xxxxxxx (Chunming Zhou)]

Change-Id: I73aa32cda17cd1039232125afa4aad299b264705
Signed-off-by: Chunming Zhou <David1.Zhou at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 20 ++++++++++++++------
 1 file changed, 14 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index df10795..3f770ec 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -713,9 +713,11 @@ int amdgpu_vm_update_page_directory(struct amdgpu_device *adev,
 {
 	int r;
 
-	r = amdgpu_vm_update_pd_or_shadow(adev, vm, true);
-	if (r)
-		return r;
+	if (amdgpu_need_backup(adev)) {
+		r = amdgpu_vm_update_pd_or_shadow(adev, vm, true);
+		if (r)
+			return r;
+	}
 	return amdgpu_vm_update_pd_or_shadow(adev, vm, false);
 }
 
@@ -729,6 +731,9 @@ int amdgpu_vm_recover_page_table_from_shadow(struct amdgpu_device *adev,
 	uint32_t domain;
 	int r;
 
+	if (!amdgpu_need_backup(adev))
+		return 0;
+
 	if (!vm->page_directory->shadow)
 		return 0;
 
@@ -1037,7 +1042,8 @@ static int amdgpu_vm_bo_update_mapping(struct amdgpu_device *adev,
 	if (r)
 		goto error_free;
 
-	amdgpu_vm_frag_ptes(&params, vm, start, last + 1, addr, flags, true);
+	if (amdgpu_need_backup(adev))
+		amdgpu_vm_frag_ptes(&params, vm, start, last + 1, addr, flags, true);
 	amdgpu_vm_frag_ptes(&params, vm, start, last + 1, addr, flags, false);
 
 	amdgpu_ring_pad_ib(ring, params.ib);
@@ -1418,7 +1424,8 @@ int amdgpu_vm_bo_map(struct amdgpu_device *adev,
 				     AMDGPU_GPU_PAGE_SIZE, true,
 				     AMDGPU_GEM_DOMAIN_VRAM,
 				     AMDGPU_GEM_CREATE_NO_CPU_ACCESS |
-				     AMDGPU_GEM_CREATE_SHADOW,
+				     (amdgpu_need_backup(adev) ?
+				      AMDGPU_GEM_CREATE_SHADOW : 0),
 				     NULL, resv, &pt);
 		if (r)
 			goto error_free;
@@ -1619,7 +1626,8 @@ int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm)
 	r = amdgpu_bo_create(adev, pd_size, align, true,
 			     AMDGPU_GEM_DOMAIN_VRAM,
 			     AMDGPU_GEM_CREATE_NO_CPU_ACCESS |
-			     AMDGPU_GEM_CREATE_SHADOW,
+			     (amdgpu_need_backup(adev) ?
+			      AMDGPU_GEM_CREATE_SHADOW : 0),
 			     NULL, NULL, &vm->page_directory);
 	if (r)
 		goto error_free_sched_entity;
-- 
1.9.1