Commit 98f41dc3 authored by Gerd Hoffmann's avatar Gerd Hoffmann
Browse files

drm/virtio: implement prime export 



Just run drm_prime_pages_to_sg() on the ttm pages list to get an
sg_table for export.  The pages list is created at object initialization
time, so there should be no need to handle an unpopulated page list.
Add a sanity check nevertheless.

Signed-off-by: default avatarGerd Hoffmann <kraxel@redhat.com>
Acked-by: default avatarNoralf Trønnes <noralf@tronnes.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20190227144441.6755-4-kraxel@redhat.com
parent 873f51d4

drivers/gpu/drm/virtio/virtgpu_drv.c

+2 −0
Original line number Diff line number Diff line
@@ -205,8 +205,10 @@ static struct drm_driver driver = { 
#if defined(CONFIG_DEBUG_FS)

	.debugfs_init = virtio_gpu_debugfs_init,

#endif

	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,

	.gem_prime_export = drm_gem_prime_export,

	.gem_prime_import = drm_gem_prime_import,

	.gem_prime_get_sg_table = virtgpu_gem_prime_get_sg_table,

	.gem_prime_vmap = virtgpu_gem_prime_vmap,

	.gem_prime_vunmap = virtgpu_gem_prime_vunmap,

	.gem_prime_mmap = virtgpu_gem_prime_mmap,

drivers/gpu/drm/virtio/virtgpu_drv.h

+1 −0
Original line number Diff line number Diff line
@@ -352,6 +352,7 @@ void virtio_gpu_object_free_sg_table(struct virtio_gpu_object *bo); 
int virtio_gpu_object_wait(struct virtio_gpu_object *bo, bool no_wait);



/* virtgpu_prime.c */

struct sg_table *virtgpu_gem_prime_get_sg_table(struct drm_gem_object *obj);

void *virtgpu_gem_prime_vmap(struct drm_gem_object *obj);

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

int virtgpu_gem_prime_mmap(struct drm_gem_object *obj,

drivers/gpu/drm/virtio/virtgpu_prime.c

+12 −0
Original line number Diff line number Diff line
@@ -28,6 +28,18 @@ 
 * device that might share buffers with virtgpu

 */



struct sg_table *virtgpu_gem_prime_get_sg_table(struct drm_gem_object *obj)

{

	struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(obj);



	if (!bo->tbo.ttm->pages || !bo->tbo.ttm->num_pages)

		/* should not happen */

		return ERR_PTR(-EINVAL);



	return drm_prime_pages_to_sg(bo->tbo.ttm->pages,

				     bo->tbo.ttm->num_pages);

}



void *virtgpu_gem_prime_vmap(struct drm_gem_object *obj)

{

	struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(obj);

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