[PATCH 2/5] drm/amdgpu: introduce struct amdgpu_bo_user

[Christian König]

Am 08.03.21 um 16:37 schrieb Nirmoy Das:
> Implement a new struct amdgpu_bo_user as subclass of
> struct amdgpu_bo and a function to created amdgpu_bo_user
> bo with a flag to identify the owner.
>
> Signed-off-by: Nirmoy Das <nirmoy.das at amd.com>
> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 28 ++++++++++++++++++++++
>   drivers/gpu/drm/amd/amdgpu/amdgpu_object.h | 14 +++++++++++
>   2 files changed, 42 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> index d32379cbad89..abfeb8304894 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> @@ -695,6 +695,34 @@ int amdgpu_bo_create(struct amdgpu_device *adev,
>   	return r;
>   }
>   
> +/**
> + * amdgpu_bo_create_user - create an &amdgpu_bo_user buffer object
> + * @adev: amdgpu device object
> + * @bp: parameters to be used for the buffer object
> + * @ubo_ptr: pointer to the buffer object pointer
> + *
> + * Create a BO to be used by user application;
> + *
> + * Returns:
> + * 0 for success or a negative error code on failure.
> + */
> +
> +int amdgpu_bo_create_user(struct amdgpu_device *adev,
> +			  struct amdgpu_bo_param *bp,
> +			  struct amdgpu_bo_user **ubo_ptr)
> +{
> +	struct amdgpu_bo *bo_ptr;
> +	int r;
> +
> +	bp->flags = bp->flags & ~AMDGPU_GEM_CREATE_SHADOW;
> +	bp->bo_ptr_size = sizeof(struct amdgpu_bo_user);
> +	r = amdgpu_bo_do_create(adev, bp, &bo_ptr);
> +	if (r)
> +		return r;
> +
> +	*ubo_ptr = amdgpu_bo_to_amdgpu_bo_user(bo_ptr);
> +	return r;
> +}
>   /**
>    * amdgpu_bo_validate - validate an &amdgpu_bo buffer object
>    * @bo: pointer to the buffer object
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
> index 8e2b556f0b7b..fd30221266c8 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
> @@ -37,6 +37,8 @@
>   #define AMDGPU_BO_INVALID_OFFSET	LONG_MAX
>   #define AMDGPU_BO_MAX_PLACEMENTS	3
>   
> +#define amdgpu_bo_to_amdgpu_bo_user(abo) container_of((abo), struct amdgpu_bo_user, bo)

Mhm, the name could be improved, but apart from that the patch looks 
good to me.

Christian.

> +
>   struct amdgpu_bo_param {
>   	unsigned long			size;
>   	int				byte_align;
> @@ -112,6 +114,15 @@ struct amdgpu_bo {
>   	struct kgd_mem                  *kfd_bo;
>   };
>   
> +struct amdgpu_bo_user {
> +	struct amdgpu_bo		bo;
> +	u64				tiling_flags;
> +	u64				metadata_flags;
> +	void				*metadata;
> +	u32				metadata_size;
> +
> +};
> +
>   static inline struct amdgpu_bo *ttm_to_amdgpu_bo(struct ttm_buffer_object *tbo)
>   {
>   	return container_of(tbo, struct amdgpu_bo, tbo);
> @@ -255,6 +266,9 @@ int amdgpu_bo_create_kernel(struct amdgpu_device *adev,
>   int amdgpu_bo_create_kernel_at(struct amdgpu_device *adev,
>   			       uint64_t offset, uint64_t size, uint32_t domain,
>   			       struct amdgpu_bo **bo_ptr, void **cpu_addr);
> +int amdgpu_bo_create_user(struct amdgpu_device *adev,
> +			  struct amdgpu_bo_param *bp,
> +			  struct amdgpu_bo_user **ubo_ptr);
>   void amdgpu_bo_free_kernel(struct amdgpu_bo **bo, u64 *gpu_addr,
>   			   void **cpu_addr);
>   int amdgpu_bo_kmap(struct amdgpu_bo *bo, void **ptr);