e16e12be34
It seemed like a good idea to use bitmap for features in struct virtio_device, but it's actually a pain, and seems to become even more painful when we get more than 32 feature bits. Just change it to a u32 for now. Based on patch by Rusty. Suggested-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
67 lines
1.8 KiB
C
67 lines
1.8 KiB
C
#ifndef LINUX_VIRTIO_H
|
|
#define LINUX_VIRTIO_H
|
|
#include <linux/scatterlist.h>
|
|
#include <linux/kernel.h>
|
|
|
|
/* TODO: empty stubs for now. Broken but enough for virtio_ring.c */
|
|
#define list_add_tail(a, b) do {} while (0)
|
|
#define list_del(a) do {} while (0)
|
|
/* end of stubs */
|
|
|
|
struct virtio_device {
|
|
void *dev;
|
|
u32 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
|