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#include <linux/spinlock.h>
   7
   8struct device {
   9        void *parent;
  10};
  11
  12struct virtio_device {
  13        struct device dev;
  14        u64 features;
  15        struct list_head vqs;
  16        spinlock_t vqs_list_lock;
  17};
  18
  19struct virtqueue {
  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                                      bool ctx,
  63                                      void *pages,
  64                                      bool (*notify)(struct virtqueue *vq),
  65                                      void (*callback)(struct virtqueue *vq),
  66                                      const char *name);
  67void vring_del_virtqueue(struct virtqueue *vq);
  68
  69#endif
  70