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/*
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*
* $FreeBSD$
*/
#ifndef __XEN_DRIVERS_BLOCK_H__
#define __XEN_DRIVERS_BLOCK_H__
#include <xen/interface/io/blkif.h>
struct xlbd_type_info
{
int partn_shift;
int disks_per_major;
char *devname;
char *diskname;
};
struct xlbd_major_info
{
int major;
int index;
int usage;
struct xlbd_type_info *type;
};
struct blk_shadow {
blkif_request_t req;
unsigned long request;
unsigned long frame[BLKIF_MAX_SEGMENTS_PER_REQUEST];
};
#define BLK_RING_SIZE __RING_SIZE((blkif_sring_t *)0, PAGE_SIZE)
struct xb_softc {
device_t xb_dev;
struct disk *xb_disk; /* disk params */
struct bio_queue_head xb_bioq; /* sort queue */
int xb_unit;
int xb_flags;
struct blkfront_info *xb_info;
LIST_ENTRY(xb_softc) entry;
#define XB_OPEN (1<<0) /* drive is open (can't shut down) */
};
/*
* We have one of these per vbd, whether ide, scsi or 'other'. They
* hang in private_data off the gendisk structure. We may end up
* putting all kinds of interesting stuff here :-)
*/
struct blkfront_info
{
device_t xbdev;
dev_t dev;
struct gendisk *gd;
int vdevice;
blkif_vdev_t handle;
int connected;
int ring_ref;
blkif_front_ring_t ring;
unsigned int irq;
struct xlbd_major_info *mi;
#if 0
request_queue_t *rq;
struct work_struct work;
#endif
struct gnttab_free_callback callback;
struct blk_shadow shadow[BLK_RING_SIZE];
unsigned long shadow_free;
struct xb_softc *sc;
int feature_barrier;
int is_ready;
/**
* The number of people holding this device open. We won't allow a
* hot-unplug unless this is 0.
*/
int users;
};
/* Note that xlvbd_add doesn't call add_disk for you: you're expected
to call add_disk on info->gd once the disk is properly connected
up. */
int xlvbd_add(device_t, blkif_sector_t capacity, int device,
uint16_t vdisk_info, uint16_t sector_size, struct blkfront_info *info);
void xlvbd_del(struct blkfront_info *info);
#endif /* __XEN_DRIVERS_BLOCK_H__ */
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