[PATCH libdrm] amdgpu: add amdgpu_bo_inc_ref() function.

[Zhang, Jerry (Junwei)]

On 09/03/2018 02:55 PM, Qiang Yu wrote:
> For Pro OGL be able to work with upstream libdrm.
>
> Signed-off-by: Qiang Yu <Qiang.Yu at amd.com>
> Reviewed-by: Christian König <christian.koenig at amd.com>

I'm fine with that, not sure if mesa is going to use that as well.

Reviewed-by: Junwei Zhang <Jerry.Zhang at amd.com>

Regards,
Jerry

> ---
>   amdgpu/amdgpu-symbol-check |  1 +
>   amdgpu/amdgpu.h            | 15 ++++++++++++++-
>   amdgpu/amdgpu_bo.c         |  6 ++++++
>   3 files changed, 21 insertions(+), 1 deletion(-)
>
> diff --git a/amdgpu/amdgpu-symbol-check b/amdgpu/amdgpu-symbol-check
> index b5e4fe6..487610e 100755
> --- a/amdgpu/amdgpu-symbol-check
> +++ b/amdgpu/amdgpu-symbol-check
> @@ -15,6 +15,7 @@ amdgpu_bo_cpu_map
>   amdgpu_bo_cpu_unmap
>   amdgpu_bo_export
>   amdgpu_bo_free
> +amdgpu_bo_inc_ref
>   amdgpu_bo_import
>   amdgpu_bo_list_create
>   amdgpu_bo_list_destroy
> diff --git a/amdgpu/amdgpu.h b/amdgpu/amdgpu.h
> index a8c353c..e1f93f8 100644
> --- a/amdgpu/amdgpu.h
> +++ b/amdgpu/amdgpu.h
> @@ -721,7 +721,20 @@ int amdgpu_find_bo_by_cpu_mapping(amdgpu_device_handle dev,
>   int amdgpu_bo_free(amdgpu_bo_handle buf_handle);
>
>   /**
> - * Request CPU access to GPU accessible memory
> + * Increase the reference count of a buffer object
> + *
> + * \param   bo - \c [in]  Buffer object handle to increase the reference count
> + *
> + * \return   0 on success\n
> + *          <0 - Negative POSIX Error code
> + *
> + * \sa amdgpu_bo_alloc(), amdgpu_bo_free()
> + *
> +*/
> +int amdgpu_bo_inc_ref(amdgpu_bo_handle bo);
> +
> +/**
> + * Request CPU access to GPU accessable memory
>    *
>    * \param   buf_handle - \c [in] Buffer handle
>    * \param   cpu        - \c [out] CPU address to be used for access
> diff --git a/amdgpu/amdgpu_bo.c b/amdgpu/amdgpu_bo.c
> index a2fc525..dceab01 100644
> --- a/amdgpu/amdgpu_bo.c
> +++ b/amdgpu/amdgpu_bo.c
> @@ -438,6 +438,12 @@ int amdgpu_bo_free(amdgpu_bo_handle buf_handle)
>   	return 0;
>   }
>
> +int amdgpu_bo_inc_ref(amdgpu_bo_handle bo)
> +{
> +	atomic_inc(&bo->refcount);
> +	return 0;
> +}
> +
>   int amdgpu_bo_cpu_map(amdgpu_bo_handle bo, void **cpu)
>   {
>   	union drm_amdgpu_gem_mmap args;
>