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
6/* TODO: empty stubs for now. Broken but enough for virtio_ring.c */
7#define list_add_tail(a, b) do {} while (0)
8#define list_del(a) do {} while (0)
9#define list_for_each_entry(a, b, c) while (0)
10/* end of stubs */
11
12struct virtio_device {
13 void *dev;
14 u64 features;
15};
16
17struct virtqueue {
18 /* TODO: commented as list macros are empty stubs for now.
19 * Broken but enough for virtio_ring.c
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/* Interfaces exported by virtio_ring. */
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 void *pages,
63 bool (*notify)(struct virtqueue *vq),
64 void (*callback)(struct virtqueue *vq),
65 const char *name);
66void vring_del_virtqueue(struct virtqueue *vq);
67
68#endif