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
   7 struct device {
   8         void *parent;
   9 };
  10
  11 struct virtio_device {
  12         struct device dev;
  13         u64 features;
  14         struct list_head vqs;
  15 };
  16
  17 struct 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. */
  28 int 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
  35 int virtqueue_add_outbuf(struct virtqueue *vq,
  36                          struct scatterlist sg[], unsigned int num,
  37                          void *data,
  38                          gfp_t gfp);
  39
  40 int virtqueue_add_inbuf(struct virtqueue *vq,
  41                         struct scatterlist sg[], unsigned int num,
  42                         void *data,
  43                         gfp_t gfp);
  44
  45 bool virtqueue_kick(struct virtqueue *vq);
  46
  47 void *virtqueue_get_buf(struct virtqueue *vq, unsigned int *len);
  48
  49 void virtqueue_disable_cb(struct virtqueue *vq);
  50
  51 bool virtqueue_enable_cb(struct virtqueue *vq);
  52 bool virtqueue_enable_cb_delayed(struct virtqueue *vq);
  53
  54 void *virtqueue_detach_unused_buf(struct virtqueue *vq);
  55 struct 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);
  65 void vring_del_virtqueue(struct virtqueue *vq);
  66
  67 #endif