Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#ifndef LINUX_VIRTIO_H
2#define LINUX_VIRTIO_H
3#include <linux/scatterlist.h>
4#include <linux/kernel.h>
5
6struct virtio_device {
7 void *dev;
8 u64 features;
9};
10
11struct virtqueue {
12 /* TODO: commented as list macros are empty stubs for now.
13 * Broken but enough for virtio_ring.c
14 * struct list_head list; */
15 void (*callback)(struct virtqueue *vq);
16 const char *name;
17 struct virtio_device *vdev;
18 unsigned int index;
19 unsigned int num_free;
20 void *priv;
21};
22
23/* Interfaces exported by virtio_ring. */
24int virtqueue_add_sgs(struct virtqueue *vq,
25 struct scatterlist *sgs[],
26 unsigned int out_sgs,
27 unsigned int in_sgs,
28 void *data,
29 gfp_t gfp);
30
31int virtqueue_add_outbuf(struct virtqueue *vq,
32 struct scatterlist sg[], unsigned int num,
33 void *data,
34 gfp_t gfp);
35
36int virtqueue_add_inbuf(struct virtqueue *vq,
37 struct scatterlist sg[], unsigned int num,
38 void *data,
39 gfp_t gfp);
40
41bool virtqueue_kick(struct virtqueue *vq);
42
43void *virtqueue_get_buf(struct virtqueue *vq, unsigned int *len);
44
45void virtqueue_disable_cb(struct virtqueue *vq);
46
47bool virtqueue_enable_cb(struct virtqueue *vq);
48bool virtqueue_enable_cb_delayed(struct virtqueue *vq);
49
50void *virtqueue_detach_unused_buf(struct virtqueue *vq);
51struct virtqueue *vring_new_virtqueue(unsigned int index,
52 unsigned int num,
53 unsigned int vring_align,
54 struct virtio_device *vdev,
55 bool weak_barriers,
56 void *pages,
57 bool (*notify)(struct virtqueue *vq),
58 void (*callback)(struct virtqueue *vq),
59 const char *name);
60void vring_del_virtqueue(struct virtqueue *vq);
61
62#endif