diff --git a/sys/sys/ccdvar.h b/sys/sys/ccdvar.h new file mode 100644 index 000000000000..00d2f2c81768 --- /dev/null +++ b/sys/sys/ccdvar.h @@ -0,0 +1,206 @@ +/* $NetBSD: ccdvar.h,v 1.7.2.1 1995/10/12 21:30:18 thorpej Exp $ */ + +/* + * Copyright (c) 1995 Jason R. Thorpe. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed for the NetBSD Project + * by Jason R. Thorpe. + * 4. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +/* + * Copyright (c) 1988 University of Utah. + * Copyright (c) 1990, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * the Systems Programming Group of the University of Utah Computer + * Science Department. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * from: Utah $Hdr: cdvar.h 1.1 90/07/09$ + * + * @(#)cdvar.h 8.1 (Berkeley) 6/10/93 + */ + +/* + * Dynamic configuration and disklabel support by: + * Jason R. Thorpe + * Numerical Aerodynamic Simulation Facility + * Mail Stop 258-6 + * NASA Ames Research Center + * Moffett Field, CA 94035 + */ + +/* + * A concatenated disk is described at initialization time by this structure. + */ +struct ccddevice { + int ccd_unit; /* logical unit of this ccd */ + int ccd_interleave; /* interleave (DEV_BSIZE blocks) */ + int ccd_flags; /* misc. information */ + int ccd_dk; /* disk number */ + struct vnode **ccd_vpp; /* array of component vnodes */ + char **ccd_cpp; /* array of component pathnames */ + int ccd_ndev; /* number of component devices */ +}; + +/* + * This structure is used to configure a ccd via ioctl(2). + */ +struct ccd_ioctl { + char **ccio_disks; /* pointer to component paths */ + int ccio_ndisks; /* number of disks to concatenate */ + int ccio_ileave; /* interleave (DEV_BSIZE blocks) */ + int ccio_flags; /* misc. information */ + int ccio_unit; /* unit number: use varies */ + size_t ccio_size; /* (returned) size of ccd */ +}; + +/* ccd_flags */ +#define CCDF_SWAP 0x01 /* interleave should be dmmax */ +#define CCDF_UNIFORM 0x02 /* use LCCD of sizes for uniform interleave */ + +/* Mask of user-settable ccd flags. */ +#define CCDF_USERMASK (CCDF_SWAP|CCDF_UNIFORM) + +/* + * Component info table. + * Describes a single component of a concatenated disk. + */ +struct ccdcinfo { + struct vnode *ci_vp; /* device's vnode */ + dev_t ci_dev; /* XXX: device's dev_t */ + size_t ci_size; /* size */ + char *ci_path; /* path to component */ + size_t ci_pathlen; /* length of component path */ +}; + +/* + * Interleave description table. + * Computed at boot time to speed irregular-interleave lookups. + * The idea is that we interleave in "groups". First we interleave + * evenly over all component disks up to the size of the smallest + * component (the first group), then we interleave evenly over all + * remaining disks up to the size of the next-smallest (second group), + * and so on. + * + * Each table entry describes the interleave characteristics of one + * of these groups. For example if a concatenated disk consisted of + * three components of 5, 3, and 7 DEV_BSIZE blocks interleaved at + * DEV_BSIZE (1), the table would have three entries: + * + * ndisk startblk startoff dev + * 3 0 0 0, 1, 2 + * 2 9 3 0, 2 + * 1 13 5 2 + * 0 - - - + * + * which says that the first nine blocks (0-8) are interleaved over + * 3 disks (0, 1, 2) starting at block offset 0 on any component disk, + * the next 4 blocks (9-12) are interleaved over 2 disks (0, 2) starting + * at component block 3, and the remaining blocks (13-14) are on disk + * 2 starting at offset 5. + */ +struct ccdiinfo { + int ii_ndisk; /* # of disks range is interleaved over */ + daddr_t ii_startblk; /* starting scaled block # for range */ + daddr_t ii_startoff; /* starting component offset (block #) */ + int *ii_index; /* ordered list of components in range */ +}; + +/* + * Concatenated disk pseudo-geometry information. + */ +struct ccdgeom { + u_int32_t ccg_secsize; /* # bytes per sector */ + u_int32_t ccg_nsectors; /* # data sectors per track */ + u_int32_t ccg_ntracks; /* # tracks per cylinder */ + u_int32_t ccg_ncylinders; /* # cylinders per unit */ +}; + +/* + * A concatenated disk is described after initialization by this structure. + */ +struct ccd_softc { + int sc_unit; /* logical unit number */ + int sc_flags; /* flags */ + int sc_cflags; /* configuration flags */ + size_t sc_size; /* size of ccd */ + int sc_ileave; /* interleave */ + int sc_nccdisks; /* number of components */ + struct ccdcinfo *sc_cinfo; /* component info */ + struct ccdiinfo *sc_itable; /* interleave table */ + int sc_nactive; /* number of requests active */ + int sc_dk; /* disk index */ + struct ccdgeom sc_geom; /* pseudo geometry info */ + struct dkdevice sc_dkdev; /* generic disk device info */ +}; + +/* sc_flags */ +#define CCDF_INITED 0x01 /* unit has been initialized */ +#define CCDF_WLABEL 0x02 /* label area is writable */ +#define CCDF_LABELLING 0x04 /* unit is currently being labelled */ +#define CCDF_WANTED 0x40 /* someone is waiting to obtain a lock */ +#define CCDF_LOCKED 0x80 /* unit is locked */ + +/* + * Before you can use a unit, it must be configured with CCDIOCSET. + * The configuration persists across opens and closes of the device; + * a CCDIOCCLR must be used to reset a configuration. An attempt to + * CCDIOCSET an already active unit will return EBUSY. Attempts to + * CCDIOCCLR an inactive unit will return ENXIO. + */ +#define CCDIOCSET _IOWR('F', 16, struct ccd_ioctl) /* enable ccd */ +#define CCDIOCCLR _IOW('F', 17, struct ccd_ioctl) /* disable ccd */