Re: [PATCH 2/7] drm/amdgpu: move shadow bo validation to VM code

["Christian König" <christian.koenig@amd.com>]

Am 26.05.21 um 12:10 schrieb Nirmoy Das:
> Do the shadow bo validation in the VM code as
> VM code knows/owns shadow BOs.
>
> Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 23 ++++-------------------
>   drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c |  5 +++++
>   2 files changed, 9 insertions(+), 19 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> index 90136f9dedd6..f6a8f0c5a52f 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> @@ -396,10 +396,10 @@ void amdgpu_cs_report_moved_bytes(struct amdgpu_device *adev, u64 num_bytes,
>   	spin_unlock(&adev->mm_stats.lock);
>   }
>   
> -static int amdgpu_cs_bo_validate(struct amdgpu_cs_parser *p,
> -				 struct amdgpu_bo *bo)
> +static int amdgpu_cs_bo_validate(void *param, struct amdgpu_bo *bo)
>   {
>   	struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
> +	struct amdgpu_cs_parser *p = param;
>   	struct ttm_operation_ctx ctx = {
>   		.interruptible = true,
>   		.no_wait_gpu = false,
> @@ -451,21 +451,6 @@ static int amdgpu_cs_bo_validate(struct amdgpu_cs_parser *p,
>   	return r;
>   }
>   
> -static int amdgpu_cs_validate(void *param, struct amdgpu_bo *bo)
> -{
> -	struct amdgpu_cs_parser *p = param;
> -	int r;
> -
> -	r = amdgpu_cs_bo_validate(p, bo);
> -	if (r)
> -		return r;
> -
> -	if (bo->shadow)
> -		r = amdgpu_cs_bo_validate(p, bo->shadow);
> -
> -	return r;
> -}
> -
>   static int amdgpu_cs_list_validate(struct amdgpu_cs_parser *p,
>   			    struct list_head *validated)
>   {
> @@ -493,7 +478,7 @@ static int amdgpu_cs_list_validate(struct amdgpu_cs_parser *p,
>   						     lobj->user_pages);
>   		}
>   
> -		r = amdgpu_cs_validate(p, bo);
> +		r = amdgpu_cs_bo_validate(p, bo);
>   		if (r)
>   			return r;
>   
> @@ -593,7 +578,7 @@ static int amdgpu_cs_parser_bos(struct amdgpu_cs_parser *p,
>   	p->bytes_moved_vis = 0;
>   
>   	r = amdgpu_vm_validate_pt_bos(p->adev, &fpriv->vm,
> -				      amdgpu_cs_validate, p);
> +				      amdgpu_cs_bo_validate, p);
>   	if (r) {
>   		DRM_ERROR("amdgpu_vm_validate_pt_bos() failed.\n");
>   		goto error_validate;
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> index da155c276c51..f474f15ba344 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> @@ -696,6 +696,11 @@ int amdgpu_vm_validate_pt_bos(struct amdgpu_device *adev, struct amdgpu_vm *vm,
>   		r = validate(param, bo);
>   		if (r)
>   			return r;
> +		if (bo->shadow) {
> +			r = validate(param, bo);

This needs to be "validate(param, bo->shadow)".

Apart from that looks good to me.

Christian.

> +			if (r)
> +				return r;
> +		}
>   
>   		if (bo->tbo.type != ttm_bo_type_kernel) {
>   			amdgpu_vm_bo_moved(bo_base);

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