The pd/pt shadow bo will be used to backup page table, when gpu reset
happens, we can restore the page table by them.
V2:
Free shadow bo.
Change-Id: I28e4a9178f59eccb215f7977b5475d36e593ee5f
Signed-off-by: Chunming Zhou <David1.Zhou at amd.com>
Reviewed-by: Christian König <christian.koenig at amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 14 +++++++++++---
1 file changed, 11 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index e1efe74f..c1b37dc 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -1341,7 +1341,8 @@ int amdgpu_vm_bo_map(struct amdgpu_device *adev,
r = amdgpu_bo_create(adev, AMDGPU_VM_PTE_COUNT * 8,
AMDGPU_GPU_PAGE_SIZE, true,
AMDGPU_GEM_DOMAIN_VRAM,
- AMDGPU_GEM_CREATE_NO_CPU_ACCESS,
+ AMDGPU_GEM_CREATE_NO_CPU_ACCESS |
+ AMDGPU_GEM_CREATE_SHADOW,
NULL, resv, &pt);
if (r)
goto error_free;
@@ -1540,7 +1541,8 @@ 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_NO_CPU_ACCESS |
+ AMDGPU_GEM_CREATE_SHADOW,
NULL, NULL, &vm->page_directory);
if (r)
goto error_free_sched_entity;
@@ -1599,10 +1601,16 @@ void amdgpu_vm_fini(struct amdgpu_device *adev, struct amdgpu_vm *vm)
kfree(mapping);
}
- for (i = 0; i < amdgpu_vm_num_pdes(adev); i++)
+ for (i = 0; i < amdgpu_vm_num_pdes(adev); i++) {
+ if (vm->page_tables[i].entry.robj &&
+ vm->page_tables[i].entry.robj->shadow)
+ amdgpu_bo_unref(&vm->page_tables[i].entry.robj->shadow);
amdgpu_bo_unref(&vm->page_tables[i].entry.robj);
+ }
drm_free_large(vm->page_tables);
+ if (vm->page_directory->shadow)
+ amdgpu_bo_unref(&vm->page_directory->shadow);
amdgpu_bo_unref(&vm->page_directory);
fence_put(vm->page_directory_fence);
}
--
1.9.1
