[deliverable/linux.git] / tools / virtio / linux / virtio.h

#ifndef LINUX_VIRTIO_H
#define LINUX_VIRTIO_H
#include <linux/scatterlist.h>
#include <linux/kernel.h>

struct device {
	void *parent;
};

struct virtio_device {
	struct device dev;
	u64 features;
};

struct virtqueue {
	/* TODO: commented as list macros are empty stubs for now.
	 * Broken but enough for virtio_ring.c
	 * struct list_head list; */
	void (*callback)(struct virtqueue *vq);
	const char *name;
	struct virtio_device *vdev;
        unsigned int index;
        unsigned int num_free;
	void *priv;
};

/* Interfaces exported by virtio_ring. */
int virtqueue_add_sgs(struct virtqueue *vq,
		      struct scatterlist *sgs[],
		      unsigned int out_sgs,
		      unsigned int in_sgs,
		      void *data,
		      gfp_t gfp);

int virtqueue_add_outbuf(struct virtqueue *vq,
			 struct scatterlist sg[], unsigned int num,
			 void *data,
			 gfp_t gfp);

int virtqueue_add_inbuf(struct virtqueue *vq,
			struct scatterlist sg[], unsigned int num,
			void *data,
			gfp_t gfp);

bool virtqueue_kick(struct virtqueue *vq);

void *virtqueue_get_buf(struct virtqueue *vq, unsigned int *len);

void virtqueue_disable_cb(struct virtqueue *vq);

bool virtqueue_enable_cb(struct virtqueue *vq);
bool virtqueue_enable_cb_delayed(struct virtqueue *vq);

void *virtqueue_detach_unused_buf(struct virtqueue *vq);
struct virtqueue *vring_new_virtqueue(unsigned int index,
				      unsigned int num,
				      unsigned int vring_align,
				      struct virtio_device *vdev,
				      bool weak_barriers,
				      void *pages,
				      bool (*notify)(struct virtqueue *vq),
				      void (*callback)(struct virtqueue *vq),
				      const char *name);
void vring_del_virtqueue(struct virtqueue *vq);

#endif
Commit	Line	Data
4e53f78e MT	1	#ifndef LINUX_VIRTIO_H
4e53f78e MT	2	#define LINUX_VIRTIO_H
61d0b5a4 RR	3	#include <linux/scatterlist.h>
61d0b5a4 RR	4	#include <linux/kernel.h>
4e53f78e	5
6be3ffaa MT	6	struct device {
	7	void *parent;
	8	};
	9
4e53f78e	10	struct virtio_device {
6be3ffaa	11	struct device dev;
d0254773	12	u64 features;
4e53f78e MT	13	};
	14
	15	struct virtqueue {
	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);
	20	const char *name;
	21	struct virtio_device *vdev;
73640c99 MT	22	unsigned int index;
73640c99 MT	23	unsigned int num_free;
4e53f78e MT	24	void *priv;
	25	};
	26
4e53f78e	27	/* Interfaces exported by virtio_ring. */
13816c76 RR	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
e538ebaf RR	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
d1b8c4c2	45	bool virtqueue_kick(struct virtqueue *vq);
4e53f78e MT	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);
64d09888	52	bool virtqueue_enable_cb_delayed(struct virtqueue *vq);
4e53f78e MT	53
4e53f78e MT	54	void virtqueue_detach_unused_buf(struct virtqueue vq);
73640c99 MT	55	struct virtqueue *vring_new_virtqueue(unsigned int index,
73640c99 MT	56	unsigned int num,
4e53f78e MT	57	unsigned int vring_align,
4e53f78e MT	58	struct virtio_device *vdev,
7b21e34f	59	bool weak_barriers,
4e53f78e	60	void *pages,
d1b8c4c2	61	bool (notify)(struct virtqueue vq),
4e53f78e MT	62	void (callback)(struct virtqueue vq),
	63	const char *name);
	64	void vring_del_virtqueue(struct virtqueue *vq);
	65
	66	#endif