[Intel-gfx] [PATCH 4/4] drm/i915: Support for pread/pwrite from/to non shmem backed objects

[Chris Wilson]

On Tue, Sep 15, 2015 at 02:03:27PM +0530, ankitprasad.r.sharma at intel.com wrote:
> @@ -1090,17 +1184,17 @@ i915_gem_pwrite_ioctl(struct drm_device *dev, void *data,
>  		goto out;
>  	}
>  
> -	/* prime objects have no backing filp to GEM pread/pwrite
> -	 * pages from.
> -	 */
> -	if (!obj->base.filp) {
> -		ret = -EINVAL;
> -		goto out;
> -	}
> -
>  	trace_i915_gem_object_pwrite(obj, args->offset, args->size);
>  
>  	ret = -EFAULT;
> +
> +	/* pwrite for non shmem backed objects */
> +	if (!obj->base.filp) {
> +		ret = i915_gem_gtt_pread_pwrite(dev, obj, args->size,
> +						args->offset, args->data_ptr,
> +						true);
> +		goto out;
> +	}

There already exists a GTT write path, along with a more correct
description of its limitations.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre