On 4/22/21 9:08 AM, Christian König wrote:
Am 21.04.21 um 18:35 schrieb Nirmoy Das:
Shadow BOs are only needed for vm code so call amdgpu_bo_create_shadow()
directly instead of depending on amdgpu_bo_create().
As far as I can see that won't work correctly.
Now you only create the shadow for the root BO, but not for anything
else.
Yes, I just realized, I have to take care of all amdgpu_vm_bo_param()
callers.
Thanks,
Nirmoy
Christian.
Signed-off-by: Nirmoy Das <nirmoy.das@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 19 +++++++++++++++----
1 file changed, 15 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index f95bcda8463f..bc302548dfba 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -873,8 +873,7 @@ static void amdgpu_vm_bo_param(struct
amdgpu_device *adev, struct amdgpu_vm *vm,
bp->bo_ptr_size = sizeof(struct amdgpu_bo);
if (vm->use_cpu_for_update)
bp->flags |= AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
- else if (!vm->root.base.bo || vm->root.base.bo->shadow)
- bp->flags |= AMDGPU_GEM_CREATE_SHADOW;
+
bp->type = ttm_bo_type_kernel;
bp->no_wait_gpu = immediate;
if (vm->root.base.bo)
@@ -2844,12 +2843,24 @@ int amdgpu_vm_init(struct amdgpu_device
*adev, struct amdgpu_vm *vm,
vm->evicting = false;
amdgpu_vm_bo_param(adev, vm, adev->vm_manager.root_level,
false, &bp);
- if (vm_context == AMDGPU_VM_CONTEXT_COMPUTE)
- bp.flags &= ~AMDGPU_GEM_CREATE_SHADOW;
r = amdgpu_bo_create(adev, &bp, &root);
if (r)
goto error_free_delayed;
+ if (!(vm_context == AMDGPU_VM_CONTEXT_COMPUTE) &&
+ (!vm->root.base.bo || vm->root.base.bo->shadow)) {
+ if (!bp.resv)
+ WARN_ON(dma_resv_lock(root->tbo.base.resv,
+ NULL));
+ r = amdgpu_bo_create_shadow(adev, bp.size, root);
+
+ if (!bp.resv)
+ dma_resv_unlock(root->tbo.base.resv);
+
+ if (r)
+ amdgpu_bo_unref(&root);
+ }
+
r = amdgpu_bo_reserve(root, true);
if (r)
goto error_free_root;
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