[PATCH 1/3] drm/prime: forward begin_cpu_access callback to drivers

[Li, Samuel]

Ping... can someone please review this patch?

Samuel Li



> -----Original Message-----
> From: amd-gfx [mailto:amd-gfx-bounces at lists.freedesktop.org] On Behalf
> Of Samuel Li
> Sent: Friday, December 15, 2017 11:28 AM
> To: dri-devel at lists.freedesktop.org; amd-gfx at lists.freedesktop.org
> Cc: Koenig, Christian <Christian.Koenig at amd.com>
> Subject: [PATCH 1/3] drm/prime: forward begin_cpu_access callback to
> drivers
> 
> From: Christian König <christian.koenig at amd.com>
> 
> Allow drivers to implement their own begin_cpu_access callback.
> 
> Change-Id: I97709b42b9351a04ee7e01106107a87bc56ea258
> Signed-off-by: Christian König <christian.koenig at amd.com>
> ---
>  drivers/gpu/drm/drm_prime.c | 13 +++++++++++++
>  include/drm/drm_drv.h       |  2 ++
>  2 files changed, 15 insertions(+)
> 
> diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c
> index 8de93a2..b4b0e64 100644
> --- a/drivers/gpu/drm/drm_prime.c
> +++ b/drivers/gpu/drm/drm_prime.c
> @@ -346,6 +346,18 @@ void drm_gem_dmabuf_release(struct dma_buf
> *dma_buf)  }  EXPORT_SYMBOL(drm_gem_dmabuf_release);
> 
> +static int drm_gem_dmabuf_begin_cpu_access(struct dma_buf *dma_buf,
> +					    enum dma_data_direction
> direction) {
> +	struct drm_gem_object *obj = dma_buf->priv;
> +	struct drm_device *dev = obj->dev;
> +
> +	if (!dev->driver->gem_prime_begin_cpu_access)
> +		return 0;
> +
> +	return dev->driver->gem_prime_begin_cpu_access(obj, direction); }
> +
>  static void *drm_gem_dmabuf_vmap(struct dma_buf *dma_buf)  {
>  	struct drm_gem_object *obj = dma_buf->priv; @@ -403,6 +415,7
> @@ static const struct dma_buf_ops drm_gem_prime_dmabuf_ops =  {
>  	.map_dma_buf = drm_gem_map_dma_buf,
>  	.unmap_dma_buf = drm_gem_unmap_dma_buf,
>  	.release = drm_gem_dmabuf_release,
> +	.begin_cpu_access = drm_gem_dmabuf_begin_cpu_access,
>  	.map = drm_gem_dmabuf_kmap,
>  	.map_atomic = drm_gem_dmabuf_kmap_atomic,
>  	.unmap = drm_gem_dmabuf_kunmap,
> diff --git a/include/drm/drm_drv.h b/include/drm/drm_drv.h index
> 412e83a..1fbf298 100644
> --- a/include/drm/drm_drv.h
> +++ b/include/drm/drm_drv.h
> @@ -475,6 +475,8 @@ struct drm_driver {
>  				struct drm_device *dev,
>  				struct dma_buf_attachment *attach,
>  				struct sg_table *sgt);
> +	int (*gem_prime_begin_cpu_access)(struct drm_gem_object *obj,
> +					   enum dma_data_direction
> direction);
>  	void *(*gem_prime_vmap)(struct drm_gem_object *obj);
>  	void (*gem_prime_vunmap)(struct drm_gem_object *obj, void
> *vaddr);
>  	int (*gem_prime_mmap)(struct drm_gem_object *obj,
> --
> 2.7.4
> 
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