Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef LINUX_VIRTIO_H
3#define LINUX_VIRTIO_H
4#include <linux/scatterlist.h>
5#include <linux/kernel.h>
6
7struct device {
8 void *parent;
9};
10
11struct virtio_device {
12 struct device dev;
13 u64 features;
14};
15
16struct virtqueue {
17 /* TODO: commented as list macros are empty stubs for now.
18 * Broken but enough for virtio_ring.c
19 * struct list_head list; */
20 void (*callback)(struct virtqueue *vq);
21 const char *name;
22 struct virtio_device *vdev;
23 unsigned int index;
24 unsigned int num_free;
25 void *priv;
26};
27
28/* Interfaces exported by virtio_ring. */
29int virtqueue_add_sgs(struct virtqueue *vq,
30 struct scatterlist *sgs[],
31 unsigned int out_sgs,
32 unsigned int in_sgs,
33 void *data,
34 gfp_t gfp);
35
36int virtqueue_add_outbuf(struct virtqueue *vq,
37 struct scatterlist sg[], unsigned int num,
38 void *data,
39 gfp_t gfp);
40
41int virtqueue_add_inbuf(struct virtqueue *vq,
42 struct scatterlist sg[], unsigned int num,
43 void *data,
44 gfp_t gfp);
45
46bool virtqueue_kick(struct virtqueue *vq);
47
48void *virtqueue_get_buf(struct virtqueue *vq, unsigned int *len);
49
50void virtqueue_disable_cb(struct virtqueue *vq);
51
52bool virtqueue_enable_cb(struct virtqueue *vq);
53bool virtqueue_enable_cb_delayed(struct virtqueue *vq);
54
55void *virtqueue_detach_unused_buf(struct virtqueue *vq);
56struct virtqueue *vring_new_virtqueue(unsigned int index,
57 unsigned int num,
58 unsigned int vring_align,
59 struct virtio_device *vdev,
60 bool weak_barriers,
61 bool ctx,
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