LXR linux/tools/virtio/linux/virtio.h

   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        struct list_head vqs;
  15};
  16
  17struct virtqueue {
  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                                      bool ctx,
  61                                      void *pages,
  62                                      bool (*notify)(struct virtqueue *vq),
  63                                      void (*callback)(struct virtqueue *vq),
  64                                      const char *name);
  65void vring_del_virtqueue(struct virtqueue *vq);
  66
  67#endif
  68