From 98f41dc3b3eeabfc80d5d5eb1c1a6294ff59b4ec Mon Sep 17 00:00:00 2001 From: Gerd Hoffmann Date: Wed, 27 Feb 2019 15:44:41 +0100 Subject: [PATCH] drm/virtio: implement prime export MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 Acked-by: Noralf Trønnes Link: http://patchwork.freedesktop.org/patch/msgid/20190227144441.6755-4-kraxel@redhat.com --- drivers/gpu/drm/virtio/virtgpu_drv.c | 2 ++ drivers/gpu/drm/virtio/virtgpu_drv.h | 1 + drivers/gpu/drm/virtio/virtgpu_prime.c | 12 ++++++++++++ 3 files changed, 15 insertions(+) diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.c b/drivers/gpu/drm/virtio/virtgpu_drv.c index 40e7ce000505..7c2893181ba4 100644 --- a/drivers/gpu/drm/virtio/virtgpu_drv.c +++ b/drivers/gpu/drm/virtio/virtgpu_drv.c @@ -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, diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.h b/drivers/gpu/drm/virtio/virtgpu_drv.h index 80eab6e3169c..86a264cee362 100644 --- a/drivers/gpu/drm/virtio/virtgpu_drv.h +++ b/drivers/gpu/drm/virtio/virtgpu_drv.h @@ -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, diff --git a/drivers/gpu/drm/virtio/virtgpu_prime.c b/drivers/gpu/drm/virtio/virtgpu_prime.c index 4352f9506440..22ef151410e0 100644 --- a/drivers/gpu/drm/virtio/virtgpu_prime.c +++ b/drivers/gpu/drm/virtio/virtgpu_prime.c @@ -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); -- 2.30.2