[PATCH 2/2] drm/amdgpu: handle domain mask checking

[Christian König]

Am 17.04.2018 um 12:38 schrieb Chunming Zhou:
> if domain is illegal, we should return error.

This check is already in amdgpu_gem_create_ioctl():
>         if (args->in.domains & ~(AMDGPU_GEM_DOMAIN_CPU |
>                                  AMDGPU_GEM_DOMAIN_GTT |
>                                  AMDGPU_GEM_DOMAIN_VRAM |
>                                  AMDGPU_GEM_DOMAIN_GDS |
>                                  AMDGPU_GEM_DOMAIN_GWS |
>                                  AMDGPU_GEM_DOMAIN_OA))
>                 return -EINVAL;

We should just check it at one place I think.

Either remove it in amdgpu_bo_do_create() or in amdgpu_gem_create_ioctl().

Regards,
Christian.

>
> Change-Id: I65a738f5ac4fc34be76de867afb0db1d4bd27c24
> Signed-off-by: Chunming Zhou <david1.zhou at amd.com>
> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 15 +++++++--------
>   include/uapi/drm/amdgpu_drm.h              |  6 ++++++
>   2 files changed, 13 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> index 9258f0694922..ddf1b3580d37 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> @@ -378,17 +378,16 @@ static int amdgpu_bo_do_create(struct amdgpu_device *adev,
>   	bo = kzalloc(sizeof(struct amdgpu_bo), GFP_KERNEL);
>   	if (bo == NULL)
>   		return -ENOMEM;
> +	preferred_domains = bp->preferred_domain ? bp->preferred_domain :
> +		bp->domain;
> +	if (preferred_domains & ~AMDGPU_GEM_DOMAIN_MASK) {
> +		kfree(bo);
> +		return -EINVAL;
> +	}
>   	drm_gem_private_object_init(adev->ddev, &bo->gem_base, size);
>   	INIT_LIST_HEAD(&bo->shadow_list);
>   	INIT_LIST_HEAD(&bo->va);
> -	preferred_domains = bp->preferred_domain ? bp->preferred_domain :
> -		bp->domain;
> -	bo->preferred_domains = preferred_domains & (AMDGPU_GEM_DOMAIN_VRAM |
> -						     AMDGPU_GEM_DOMAIN_GTT |
> -						     AMDGPU_GEM_DOMAIN_CPU |
> -						     AMDGPU_GEM_DOMAIN_GDS |
> -						     AMDGPU_GEM_DOMAIN_GWS |
> -						     AMDGPU_GEM_DOMAIN_OA);
> +	bo->preferred_domains = preferred_domains;
>   	bo->allowed_domains = bo->preferred_domains;
>   	if (bp->type != ttm_bo_type_kernel &&
>   	    bo->allowed_domains == AMDGPU_GEM_DOMAIN_VRAM)
> diff --git a/include/uapi/drm/amdgpu_drm.h b/include/uapi/drm/amdgpu_drm.h
> index 0087799962cf..d023d3c4ee51 100644
> --- a/include/uapi/drm/amdgpu_drm.h
> +++ b/include/uapi/drm/amdgpu_drm.h
> @@ -81,6 +81,12 @@ extern "C" {
>   #define AMDGPU_GEM_DOMAIN_GDS		0x8
>   #define AMDGPU_GEM_DOMAIN_GWS		0x10
>   #define AMDGPU_GEM_DOMAIN_OA		0x20
> +#define AMDGPU_GEM_DOMAIN_MASK		(AMDGPU_GEM_DOMAIN_CPU | \
> +					 AMDGPU_GEM_DOMAIN_GTT | \
> +					 AMDGPU_GEM_DOMAIN_VRAM | \
> +					 AMDGPU_GEM_DOMAIN_GDS | \
> +					 AMDGPU_GEM_DOMAIN_GWS | \
> +					 AMDGPU_GEM_DOMAIN_OA)
>   
>   /* Flag that CPU access will be required for the case of VRAM domain */
>   #define AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED	(1 << 0)