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drm/virtio: implement prime export

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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: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Noralf Trønnes <noralf@tronnes.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20190227144441.6755-4-kraxel@redhat.com
This commit is contained in:
Gerd Hoffmann
2019-02-27 15:44:41 +01:00
parent 873f51d434
commit 98f41dc3b3
3 changed files with 15 additions and 0 deletions
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1
drivers/gpu/drm/virtio/virtgpu_drv.h
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@@ -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,