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Commit a4f8cf10 authored by Gerd Hoffmann's avatar Gerd Hoffmann Committed by Alistair Delva
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BACKPORT: 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


(cherry picked from commit 98f41dc3b3eeabfc80d5d5eb1c1a6294ff59b4ec)
Signed-off-by: default avatarGreg Hartman <ghartman@google.com>
BUG: 139386237
Change-Id: If0ab11829ec7a6166928e26b8f75e1510742493e
parent a4be74b2

drivers/gpu/drm/virtio/virtgpu_prime.c

+8 −2
Original line number Diff line number Diff line
@@ -30,8 +30,14 @@ 


struct sg_table *virtgpu_gem_prime_get_sg_table(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);



	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);

}



struct drm_gem_object *virtgpu_gem_prime_import_sg_table(