1 /* SPDX-License-Identifier: GPL-2.0 */
4 #include <linux/scatterlist.h>
5 #include <linux/kernel.h>
11 struct virtio_device {
17 /* TODO: commented as list macros are empty stubs for now.
18 * Broken but enough for virtio_ring.c
19 * struct list_head list; */
20 void (*callback)(struct virtqueue *vq);
22 struct virtio_device *vdev;
24 unsigned int num_free;
28 /* Interfaces exported by virtio_ring. */
29 int virtqueue_add_sgs(struct virtqueue *vq,
30 struct scatterlist *sgs[],
36 int virtqueue_add_outbuf(struct virtqueue *vq,
37 struct scatterlist sg[], unsigned int num,
41 int virtqueue_add_inbuf(struct virtqueue *vq,
42 struct scatterlist sg[], unsigned int num,
46 bool virtqueue_kick(struct virtqueue *vq);
48 void *virtqueue_get_buf(struct virtqueue *vq, unsigned int *len);
50 void virtqueue_disable_cb(struct virtqueue *vq);
52 bool virtqueue_enable_cb(struct virtqueue *vq);
53 bool virtqueue_enable_cb_delayed(struct virtqueue *vq);
55 void *virtqueue_detach_unused_buf(struct virtqueue *vq);
56 struct virtqueue *vring_new_virtqueue(unsigned int index,
58 unsigned int vring_align,
59 struct virtio_device *vdev,
63 bool (*notify)(struct virtqueue *vq),
64 void (*callback)(struct virtqueue *vq),
66 void vring_del_virtqueue(struct virtqueue *vq);