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| 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 | |
| 8 | struct device { |
| 9 | void *parent; |
| 10 | }; |
| 11 | |
| 12 | struct virtio_device { |
| 13 | struct device dev; |
| 14 | u64 features; |
| 15 | struct list_head vqs; |
| 16 | spinlock_t vqs_list_lock; |
| 17 | const struct virtio_config_ops *config; |
| 18 | }; |
| 19 | |
| 20 | struct virtqueue { |
| 21 | struct list_head list; |
| 22 | void (*callback)(struct virtqueue *vq); |
| 23 | const char *name; |
| 24 | struct virtio_device *vdev; |
| 25 | unsigned int index; |
| 26 | unsigned int num_free; |
| 27 | unsigned int num_max; |
| 28 | void *priv; |
| 29 | bool reset; |
| 30 | }; |
| 31 | |
| 32 | /* Interfaces exported by virtio_ring. */ |
| 33 | int virtqueue_add_sgs(struct virtqueue *vq, |
| 34 | struct scatterlist *sgs[], |
| 35 | unsigned int out_sgs, |
| 36 | unsigned int in_sgs, |
| 37 | void *data, |
| 38 | gfp_t gfp); |
| 39 | |
| 40 | int virtqueue_add_outbuf(struct virtqueue *vq, |
| 41 | struct scatterlist sg[], unsigned int num, |
| 42 | void *data, |
| 43 | gfp_t gfp); |
| 44 | |
| 45 | int virtqueue_add_inbuf(struct virtqueue *vq, |
| 46 | struct scatterlist sg[], unsigned int num, |
| 47 | void *data, |
| 48 | gfp_t gfp); |
| 49 | |
| 50 | bool virtqueue_kick(struct virtqueue *vq); |
| 51 | |
| 52 | void *virtqueue_get_buf(struct virtqueue *vq, unsigned int *len); |
| 53 | |
| 54 | void virtqueue_disable_cb(struct virtqueue *vq); |
| 55 | |
| 56 | bool virtqueue_enable_cb(struct virtqueue *vq); |
| 57 | bool virtqueue_enable_cb_delayed(struct virtqueue *vq); |
| 58 | |
| 59 | void *virtqueue_detach_unused_buf(struct virtqueue *vq); |
| 60 | struct virtqueue *vring_new_virtqueue(unsigned int index, |
| 61 | unsigned int num, |
| 62 | unsigned int vring_align, |
| 63 | struct virtio_device *vdev, |
| 64 | bool weak_barriers, |
| 65 | bool ctx, |
| 66 | void *pages, |
| 67 | bool (*notify)(struct virtqueue *vq), |
| 68 | void (*callback)(struct virtqueue *vq), |
| 69 | const char *name); |
| 70 | void vring_del_virtqueue(struct virtqueue *vq); |
| 71 | |
| 72 | #endif |
| 73 |
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