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drm/virtio: switch virtio_gpu_wait_ioctl() to gem helper.

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Use drm_gem_reservation_object_wait() in virtio_gpu_wait_ioctl().
This also makes the ioctl run lockless.

v9: fix return value.
v5: handle lookup failure.
v2: use reservation_object_test_signaled_rcu for VIRTGPU_WAIT_NOWAIT.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Chia-I Wu <olvaffe@gmail.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20190829103301.3539-3-kraxel@redhat.com
This commit is contained in:
Gerd Hoffmann 2019-08-29 12:32:45 +02:00
parent 889165ad61
commit 29cf12394c
1 changed files with 16 additions and 12 deletions
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28
drivers/gpu/drm/virtio/virtgpu_ioctl.c
View file

@ -463,25 +463,29 @@ static int virtio_gpu_transfer_to_host_ioctl(struct drm_device *dev, void *data,
}
static int virtio_gpu_wait_ioctl(struct drm_device *dev, void *data,
struct drm_file *file)
struct drm_file *file)
{
struct drm_virtgpu_3d_wait *args = data;
struct drm_gem_object *gobj = NULL;
struct virtio_gpu_object *qobj = NULL;
struct drm_gem_object *obj;
long timeout = 15 * HZ;
int ret;
bool nowait = false;
gobj = drm_gem_object_lookup(file, args->handle);
if (gobj == NULL)
obj = drm_gem_object_lookup(file, args->handle);
if (obj == NULL)
return -ENOENT;
qobj = gem_to_virtio_gpu_obj(gobj);
if (args->flags & VIRTGPU_WAIT_NOWAIT) {
ret = dma_resv_test_signaled_rcu(obj->resv, true);
} else {
ret = dma_resv_wait_timeout_rcu(obj->resv, true, true,
timeout);
}
if (ret == 0)
ret = -EBUSY;
else if (ret > 0)
ret = 0;
if (args->flags & VIRTGPU_WAIT_NOWAIT)
nowait = true;
ret = virtio_gpu_object_wait(qobj, nowait);
drm_gem_object_put_unlocked(gobj);
drm_gem_object_put_unlocked(obj);
return ret;
}