1 /* SPDX-License-Identifier: GPL-2.0 */
4 #include <linux/scatterlist.h>
5 #include <linux/kernel.h>
6 #include <linux/spinlock.h>
12 struct virtio_device {
16 spinlock_t vqs_list_lock;
20 struct list_head list;
21 void (*callback)(struct virtqueue *vq);
23 struct virtio_device *vdev;
25 unsigned int num_free;
29 /* Interfaces exported by virtio_ring. */
30 int virtqueue_add_sgs(struct virtqueue *vq,
31 struct scatterlist *sgs[],
37 int virtqueue_add_outbuf(struct virtqueue *vq,
38 struct scatterlist sg[], unsigned int num,
42 int virtqueue_add_inbuf(struct virtqueue *vq,
43 struct scatterlist sg[], unsigned int num,
47 bool virtqueue_kick(struct virtqueue *vq);
49 void *virtqueue_get_buf(struct virtqueue *vq, unsigned int *len);
51 void virtqueue_disable_cb(struct virtqueue *vq);
53 bool virtqueue_enable_cb(struct virtqueue *vq);
54 bool virtqueue_enable_cb_delayed(struct virtqueue *vq);
56 void *virtqueue_detach_unused_buf(struct virtqueue *vq);
57 struct virtqueue *vring_new_virtqueue(unsigned int index,
59 unsigned int vring_align,
60 struct virtio_device *vdev,
64 bool (*notify)(struct virtqueue *vq),
65 void (*callback)(struct virtqueue *vq),
67 void vring_del_virtqueue(struct virtqueue *vq);