Commit a03fb717 authored by Ezequiel Garcia's avatar Ezequiel Garcia Committed by Gerd Hoffmann
Browse files

virtio: Support prime objects vmap/vunmap 



Implement vmap/vunmap so we can export dmabufs to
other drivers, such as video4linux.

Tested with a virtio-gpu / vivid (virtual capture driver)
pipeline, where the vivid driver imports the dmabufs exported
by virtio-gpu.

Note that dma_buf_vmap() does its own vmap counting, so
it's not needed to take care of it in the driver.

Signed-off-by: default avatarEzequiel Garcia <ezequiel@collabora.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20180925161606.17980-4-ezequiel@collabora.com


Signed-off-by: default avatarGerd Hoffmann <kraxel@redhat.com>
parent a20c4173

drivers/gpu/drm/virtio/virtgpu_prime.c

+8 −3
Original line number Diff line number Diff line
@@ -55,13 +55,18 @@ struct drm_gem_object *virtgpu_gem_prime_import_sg_table( 


void *virtgpu_gem_prime_vmap(struct drm_gem_object *obj)

{

	WARN_ONCE(1, "not implemented");

	return ERR_PTR(-ENODEV);

	struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(obj);

	int ret;



	ret = virtio_gpu_object_kmap(bo);

	if (ret)

		return NULL;

	return bo->vmap;

}



void virtgpu_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)

{

	WARN_ONCE(1, "not implemented");

	virtio_gpu_object_kunmap(gem_to_virtio_gpu_obj(obj));

}



int virtgpu_gem_prime_mmap(struct drm_gem_object *obj,