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