1
2#ifndef LINUX_VIRTIO_H
3#define LINUX_VIRTIO_H
4#include <linux/scatterlist.h>
5#include <linux/kernel.h>
6#include <linux/spinlock.h>
7
8struct device {
9 void *parent;
10};
11
12struct virtio_device {
13 struct device dev;
14 u64 features;
15 struct list_head vqs;
16 spinlock_t vqs_list_lock;
17};
18
19struct virtqueue {
20 struct list_head list;
21 void (*callback)(struct virtqueue *vq);
22 const char *name;
23 struct virtio_device *vdev;
24 unsigned int index;
25 unsigned int num_free;
26 void *priv;
27};
28
29
30int virtqueue_add_sgs(struct virtqueue *vq,
31 struct scatterlist *sgs[],
32 unsigned int out_sgs,
33 unsigned int in_sgs,
34 void *data,
35 gfp_t gfp);
36
37int virtqueue_add_outbuf(struct virtqueue *vq,
38 struct scatterlist sg[], unsigned int num,
39 void *data,
40 gfp_t gfp);
41
42int virtqueue_add_inbuf(struct virtqueue *vq,
43 struct scatterlist sg[], unsigned int num,
44 void *data,
45 gfp_t gfp);
46
47bool virtqueue_kick(struct virtqueue *vq);
48
49void *virtqueue_get_buf(struct virtqueue *vq, unsigned int *len);
50
51void virtqueue_disable_cb(struct virtqueue *vq);
52
53bool virtqueue_enable_cb(struct virtqueue *vq);
54bool virtqueue_enable_cb_delayed(struct virtqueue *vq);
55
56void *virtqueue_detach_unused_buf(struct virtqueue *vq);
57struct virtqueue *vring_new_virtqueue(unsigned int index,
58 unsigned int num,
59 unsigned int vring_align,
60 struct virtio_device *vdev,
61 bool weak_barriers,
62 bool ctx,
63 void *pages,
64 bool (*notify)(struct virtqueue *vq),
65 void (*callback)(struct virtqueue *vq),
66 const char *name);
67void vring_del_virtqueue(struct virtqueue *vq);
68
69#endif
70