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Diffstat (limited to 'sys/dev/xen/blkfront/block.h')
| -rw-r--r-- | sys/dev/xen/blkfront/block.h | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/sys/dev/xen/blkfront/block.h b/sys/dev/xen/blkfront/block.h new file mode 100644 index 0000000..0d14459 --- /dev/null +++ b/sys/dev/xen/blkfront/block.h @@ -0,0 +1,97 @@ +/* + * + * 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 +{ + struct xenbus_device *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(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__ */ + |
