3 #include <linux/scatterlist.h>
4 #include <linux/kernel.h>
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)
12 struct virtio_device {
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);
23 struct virtio_device *vdev;
25 unsigned int num_free;
29 /* Interfaces exported by virtio_ring. */
30 int virtqueue_add_sgs(struct virtqueue *vq,
31 struct scatterlist *sgs[],
37 int virtqueue_add_outbuf(struct virtqueue *vq,
38 struct scatterlist sg[], unsigned int num,
42 int virtqueue_add_inbuf(struct virtqueue *vq,
43 struct scatterlist sg[], unsigned int num,
47 bool virtqueue_kick(struct virtqueue *vq);
49 void *virtqueue_get_buf(struct virtqueue *vq, unsigned int *len);
51 void virtqueue_disable_cb(struct virtqueue *vq);
53 bool virtqueue_enable_cb(struct virtqueue *vq);
54 bool virtqueue_enable_cb_delayed(struct virtqueue *vq);
56 void *virtqueue_detach_unused_buf(struct virtqueue *vq);
57 struct virtqueue *vring_new_virtqueue(unsigned int index,
59 unsigned int vring_align,
60 struct virtio_device *vdev,
63 bool (*notify)(struct virtqueue *vq),
64 void (*callback)(struct virtqueue *vq),
66 void vring_del_virtqueue(struct virtqueue *vq);