[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 virtio_device {
	void *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
4e53f78e MT	6	struct virtio_device {
4e53f78e MT	7	void *dev;
d0254773	8	u64 features;
4e53f78e MT	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;
73640c99 MT	18	unsigned int index;
73640c99 MT	19	unsigned int num_free;
4e53f78e MT	20	void *priv;
	21	};
	22
4e53f78e	23	/* Interfaces exported by virtio_ring. */
13816c76 RR	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
e538ebaf RR	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
d1b8c4c2	41	bool virtqueue_kick(struct virtqueue *vq);
4e53f78e MT	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);
64d09888	48	bool virtqueue_enable_cb_delayed(struct virtqueue *vq);
4e53f78e MT	49
4e53f78e MT	50	void virtqueue_detach_unused_buf(struct virtqueue vq);
73640c99 MT	51	struct virtqueue *vring_new_virtqueue(unsigned int index,
73640c99 MT	52	unsigned int num,
4e53f78e MT	53	unsigned int vring_align,
4e53f78e MT	54	struct virtio_device *vdev,
7b21e34f	55	bool weak_barriers,
4e53f78e	56	void *pages,
d1b8c4c2	57	bool (notify)(struct virtqueue vq),
4e53f78e MT	58	void (callback)(struct virtqueue vq),
	59	const char *name);
	60	void vring_del_virtqueue(struct virtqueue *vq);
	61
	62	#endif