3 #include <linux/scatterlist.h>
4 #include <linux/kernel.h>
10 struct virtio_device
{
16 /* TODO: commented as list macros are empty stubs for now.
17 * Broken but enough for virtio_ring.c
18 * struct list_head list; */
19 void (*callback
)(struct virtqueue
*vq
);
21 struct virtio_device
*vdev
;
23 unsigned int num_free
;
27 /* Interfaces exported by virtio_ring. */
28 int virtqueue_add_sgs(struct virtqueue
*vq
,
29 struct scatterlist
*sgs
[],
35 int virtqueue_add_outbuf(struct virtqueue
*vq
,
36 struct scatterlist sg
[], unsigned int num
,
40 int virtqueue_add_inbuf(struct virtqueue
*vq
,
41 struct scatterlist sg
[], unsigned int num
,
45 bool virtqueue_kick(struct virtqueue
*vq
);
47 void *virtqueue_get_buf(struct virtqueue
*vq
, unsigned int *len
);
49 void virtqueue_disable_cb(struct virtqueue
*vq
);
51 bool virtqueue_enable_cb(struct virtqueue
*vq
);
52 bool virtqueue_enable_cb_delayed(struct virtqueue
*vq
);
54 void *virtqueue_detach_unused_buf(struct virtqueue
*vq
);
55 struct virtqueue
*vring_new_virtqueue(unsigned int index
,
57 unsigned int vring_align
,
58 struct virtio_device
*vdev
,
61 bool (*notify
)(struct virtqueue
*vq
),
62 void (*callback
)(struct virtqueue
*vq
),
64 void vring_del_virtqueue(struct virtqueue
*vq
);
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