sys/dktp/bbh.h

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#ifndef _SYS_DKTP_BBH_H
#define _SYS_DKTP_BBH_H

#include <sys/scsi/scsi_types.h>

#ifdef  __cplusplus
extern "C" {
#endif

struct  bbh_cookie {
    lldaddr_t   _ck_sector; /* sector # on device (union)   */
    long        ck_seclen;  /* number of contiguous sec */
};
#define ck_lsector  _ck_sector._f
#define ck_sector   _ck_sector._p._l
typedef struct  bbh_cookie *bbh_cookie_t;

struct  bbh_handle {
    int h_totck;
    int h_idx;
    struct  bbh_cookie *h_cktab;
};

struct  bbh_obj {
    opaque_t        bbh_data;
    struct bbh_objops   *bbh_ops;
};

struct  bbh_objops {
    int     (*bbh_init)(opaque_t);
    int     (*bbh_free)(struct bbh_obj *);
    opaque_t    (*bbh_gethandle)(opaque_t, struct buf *);
    bbh_cookie_t    (*bbh_htoc)(opaque_t, opaque_t);
    void        (*bbh_freehandle)(opaque_t, opaque_t);
    void        *bbh_resv[2];
};

#define BBH_GETCK_SECTOR(X, ckp) ((ckp)->ck_sector)
#define BBH_GETCK_SECLEN(X, ckp) ((ckp)->ck_seclen)

#define BBH_INIT(X) (*((struct bbh_obj *)(X))->bbh_ops->bbh_init)\
    (((struct bbh_obj *)(X))->bbh_data)
#define BBH_FREE(X) (*((struct bbh_obj *)(X))->bbh_ops->bbh_free) ((X))
#define BBH_GETHANDLE(X, bp) (*((struct bbh_obj *)(X))->bbh_ops->bbh_gethandle)\
    (((struct bbh_obj *)(X))->bbh_data, (bp))
#define BBH_HTOC(X, handle) (*((struct bbh_obj *)(X))->bbh_ops->bbh_htoc) \
    (((struct bbh_obj *)(X))->bbh_data, (handle))
#define BBH_FREEHANDLE(X, handle) \
    (*((struct bbh_obj *)(X))->bbh_ops->bbh_freehandle) \
    (((struct bbh_obj *)(X))->bbh_data, (handle))

#ifdef  __cplusplus
}
#endif

#endif  /* _SYS_DKTP_BBH_H */