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 device {
7 void *parent;
8};
9
10struct virtio_device {
11 struct device dev;
12 u64 features;
13};
14
15struct virtqueue {
16 /* TODO: commented as list macros are empty stubs for now.
17 * Broken but enough for virtio_ring.c
18 * struct list_head list; */
19 void (*callback)(struct virtqueue *vq);
20 const char *name;
21 struct virtio_device *vdev;
22 unsigned int index;
23 unsigned int num_free;
24 void *priv;
25};
26
27/* Interfaces exported by virtio_ring. */
28int virtqueue_add_sgs(struct virtqueue *vq,
29 struct scatterlist *sgs[],
30 unsigned int out_sgs,
31 unsigned int in_sgs,
32 void *data,
33 gfp_t gfp);
34
35int virtqueue_add_outbuf(struct virtqueue *vq,
36 struct scatterlist sg[], unsigned int num,
37 void *data,
38 gfp_t gfp);
39
40int virtqueue_add_inbuf(struct virtqueue *vq,
41 struct scatterlist sg[], unsigned int num,
42 void *data,
43 gfp_t gfp);
44
45bool virtqueue_kick(struct virtqueue *vq);
46
47void *virtqueue_get_buf(struct virtqueue *vq, unsigned int *len);
48
49void virtqueue_disable_cb(struct virtqueue *vq);
50
51bool virtqueue_enable_cb(struct virtqueue *vq);
52bool virtqueue_enable_cb_delayed(struct virtqueue *vq);
53
54void *virtqueue_detach_unused_buf(struct virtqueue *vq);
55struct virtqueue *vring_new_virtqueue(unsigned int index,
56 unsigned int num,
57 unsigned int vring_align,
58 struct virtio_device *vdev,
59 bool weak_barriers,
60 void *pages,
61 bool (*notify)(struct virtqueue *vq),
62 void (*callback)(struct virtqueue *vq),
63 const char *name);
64void vring_del_virtqueue(struct virtqueue *vq);
65
66#endif