Michael S. Tsirkin | 4e53f78 | 2010-11-29 19:16:37 +0200 | [diff] [blame] | 1 | #ifndef LINUX_VIRTIO_H |
| 2 | #define LINUX_VIRTIO_H |
Rusty Russell | 61d0b5a4 | 2013-03-18 13:22:19 +1030 | [diff] [blame] | 3 | #include <linux/scatterlist.h> |
| 4 | #include <linux/kernel.h> |
Michael S. Tsirkin | 4e53f78 | 2010-11-29 19:16:37 +0200 | [diff] [blame] | 5 | |
Michael S. Tsirkin | 4e53f78 | 2010-11-29 19:16:37 +0200 | [diff] [blame] | 6 | struct virtio_device { |
| 7 | void *dev; |
Michael S. Tsirkin | d025477 | 2014-10-07 16:39:43 +0200 | [diff] [blame] | 8 | u64 features; |
Michael S. Tsirkin | 4e53f78 | 2010-11-29 19:16:37 +0200 | [diff] [blame] | 9 | }; |
| 10 | |
| 11 | struct virtqueue { |
| 12 | /* TODO: commented as list macros are empty stubs for now. |
| 13 | * Broken but enough for virtio_ring.c |
| 14 | * struct list_head list; */ |
| 15 | void (*callback)(struct virtqueue *vq); |
| 16 | const char *name; |
| 17 | struct virtio_device *vdev; |
Michael S. Tsirkin | 73640c9 | 2013-03-18 13:22:18 +1030 | [diff] [blame] | 18 | unsigned int index; |
| 19 | unsigned int num_free; |
Michael S. Tsirkin | 4e53f78 | 2010-11-29 19:16:37 +0200 | [diff] [blame] | 20 | void *priv; |
| 21 | }; |
| 22 | |
Michael S. Tsirkin | 4e53f78 | 2010-11-29 19:16:37 +0200 | [diff] [blame] | 23 | /* Interfaces exported by virtio_ring. */ |
Rusty Russell | 13816c7 | 2013-03-20 15:37:09 +1030 | [diff] [blame] | 24 | int virtqueue_add_sgs(struct virtqueue *vq, |
| 25 | struct scatterlist *sgs[], |
| 26 | unsigned int out_sgs, |
| 27 | unsigned int in_sgs, |
| 28 | void *data, |
| 29 | gfp_t gfp); |
| 30 | |
Rusty Russell | e538eba | 2013-03-20 15:44:26 +1030 | [diff] [blame] | 31 | int virtqueue_add_outbuf(struct virtqueue *vq, |
| 32 | struct scatterlist sg[], unsigned int num, |
| 33 | void *data, |
| 34 | gfp_t gfp); |
| 35 | |
| 36 | int virtqueue_add_inbuf(struct virtqueue *vq, |
| 37 | struct scatterlist sg[], unsigned int num, |
| 38 | void *data, |
| 39 | gfp_t gfp); |
| 40 | |
Joel Stanley | d1b8c4c | 2014-02-13 15:03:44 +1030 | [diff] [blame] | 41 | bool virtqueue_kick(struct virtqueue *vq); |
Michael S. Tsirkin | 4e53f78 | 2010-11-29 19:16:37 +0200 | [diff] [blame] | 42 | |
| 43 | void *virtqueue_get_buf(struct virtqueue *vq, unsigned int *len); |
| 44 | |
| 45 | void virtqueue_disable_cb(struct virtqueue *vq); |
| 46 | |
| 47 | bool virtqueue_enable_cb(struct virtqueue *vq); |
Michael S. Tsirkin | 64d0988 | 2012-04-16 10:11:12 -0400 | [diff] [blame] | 48 | bool virtqueue_enable_cb_delayed(struct virtqueue *vq); |
Michael S. Tsirkin | 4e53f78 | 2010-11-29 19:16:37 +0200 | [diff] [blame] | 49 | |
| 50 | void *virtqueue_detach_unused_buf(struct virtqueue *vq); |
Michael S. Tsirkin | 73640c9 | 2013-03-18 13:22:18 +1030 | [diff] [blame] | 51 | struct virtqueue *vring_new_virtqueue(unsigned int index, |
| 52 | unsigned int num, |
Michael S. Tsirkin | 4e53f78 | 2010-11-29 19:16:37 +0200 | [diff] [blame] | 53 | unsigned int vring_align, |
| 54 | struct virtio_device *vdev, |
Rusty Russell | 7b21e34 | 2012-01-12 15:44:42 +1030 | [diff] [blame] | 55 | bool weak_barriers, |
Michael S. Tsirkin | 4e53f78 | 2010-11-29 19:16:37 +0200 | [diff] [blame] | 56 | void *pages, |
Joel Stanley | d1b8c4c | 2014-02-13 15:03:44 +1030 | [diff] [blame] | 57 | bool (*notify)(struct virtqueue *vq), |
Michael S. Tsirkin | 4e53f78 | 2010-11-29 19:16:37 +0200 | [diff] [blame] | 58 | void (*callback)(struct virtqueue *vq), |
| 59 | const char *name); |
| 60 | void vring_del_virtqueue(struct virtqueue *vq); |
| 61 | |
| 62 | #endif |