diff options
Diffstat (limited to 'include/hw/virtio/virtio.h')
| -rw-r--r-- | include/hw/virtio/virtio.h | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h index d2a1938757..0fcbc5c0c6 100644 --- a/include/hw/virtio/virtio.h +++ b/include/hw/virtio/virtio.h @@ -273,9 +273,13 @@ void qemu_put_virtqueue_element(VirtIODevice *vdev, QEMUFile *f, VirtQueueElement *elem); int virtqueue_avail_bytes(VirtQueue *vq, unsigned int in_bytes, unsigned int out_bytes); -void virtqueue_get_avail_bytes(VirtQueue *vq, unsigned int *in_bytes, - unsigned int *out_bytes, - unsigned max_in_bytes, unsigned max_out_bytes); +/** + * Return <0 on error or an opaque >=0 to pass to + * virtio_queue_enable_notification_and_check on success. + */ +int virtqueue_get_avail_bytes(VirtQueue *vq, unsigned int *in_bytes, + unsigned int *out_bytes, unsigned max_in_bytes, + unsigned max_out_bytes); void virtio_notify_irqfd(VirtIODevice *vdev, VirtQueue *vq); void virtio_notify(VirtIODevice *vdev, VirtQueue *vq); @@ -309,6 +313,15 @@ int virtio_queue_ready(VirtQueue *vq); int virtio_queue_empty(VirtQueue *vq); +/** + * Enable notification and check whether guest has added some + * buffers since last call to virtqueue_get_avail_bytes. + * + * @opaque: value returned from virtqueue_get_avail_bytes + */ +bool virtio_queue_enable_notification_and_check(VirtQueue *vq, + int opaque); + void virtio_queue_set_shadow_avail_idx(VirtQueue *vq, uint16_t idx); /* Host binding interface. */ |