ccdvar.h revision 1.16
1 /* $NetBSD: ccdvar.h,v 1.16 1999/01/12 00:21:47 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1996, 1997, 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Copyright (c) 1988 University of Utah. 41 * Copyright (c) 1990, 1993 42 * The Regents of the University of California. All rights reserved. 43 * 44 * This code is derived from software contributed to Berkeley by 45 * the Systems Programming Group of the University of Utah Computer 46 * Science Department. 47 * 48 * Redistribution and use in source and binary forms, with or without 49 * modification, are permitted provided that the following conditions 50 * are met: 51 * 1. Redistributions of source code must retain the above copyright 52 * notice, this list of conditions and the following disclaimer. 53 * 2. Redistributions in binary form must reproduce the above copyright 54 * notice, this list of conditions and the following disclaimer in the 55 * documentation and/or other materials provided with the distribution. 56 * 3. All advertising materials mentioning features or use of this software 57 * must display the following acknowledgement: 58 * This product includes software developed by the University of 59 * California, Berkeley and its contributors. 60 * 4. Neither the name of the University nor the names of its contributors 61 * may be used to endorse or promote products derived from this software 62 * without specific prior written permission. 63 * 64 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 65 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 66 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 67 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 68 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 69 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 70 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 71 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 72 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 73 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 74 * SUCH DAMAGE. 75 * 76 * from: Utah $Hdr: cdvar.h 1.1 90/07/09$ 77 * 78 * @(#)cdvar.h 8.1 (Berkeley) 6/10/93 79 */ 80 81 #include <sys/lock.h> 82 #include <sys/pool.h> 83 #include <sys/queue.h> 84 85 /* 86 * Dynamic configuration and disklabel support by: 87 * Jason R. Thorpe <thorpej (at) nas.nasa.gov> 88 * Numerical Aerodynamic Simulation Facility 89 * Mail Stop 258-6 90 * NASA Ames Research Center 91 * Moffett Field, CA 94035 92 */ 93 94 /* 95 * This structure is used to configure a ccd via ioctl(2). 96 */ 97 struct ccd_ioctl { 98 char **ccio_disks; /* pointer to component paths */ 99 int ccio_ndisks; /* number of disks to concatenate */ 100 int ccio_ileave; /* interleave (DEV_BSIZE blocks) */ 101 int ccio_flags; /* see sc_flags below */ 102 int ccio_unit; /* unit number: use varies */ 103 size_t ccio_size; /* (returned) size of ccd */ 104 }; 105 106 /* 107 * Component info table. 108 * Describes a single component of a concatenated disk. 109 */ 110 struct ccdcinfo { 111 struct vnode *ci_vp; /* device's vnode */ 112 dev_t ci_dev; /* XXX: device's dev_t */ 113 size_t ci_size; /* size */ 114 char *ci_path; /* path to component */ 115 size_t ci_pathlen; /* length of component path */ 116 }; 117 118 /* 119 * Interleave description table. 120 * Computed at boot time to speed irregular-interleave lookups. 121 * The idea is that we interleave in "groups". First we interleave 122 * evenly over all component disks up to the size of the smallest 123 * component (the first group), then we interleave evenly over all 124 * remaining disks up to the size of the next-smallest (second group), 125 * and so on. 126 * 127 * Each table entry describes the interleave characteristics of one 128 * of these groups. For example if a concatenated disk consisted of 129 * three components of 5, 3, and 7 DEV_BSIZE blocks interleaved at 130 * DEV_BSIZE (1), the table would have three entries: 131 * 132 * ndisk startblk startoff dev 133 * 3 0 0 0, 1, 2 134 * 2 9 3 0, 2 135 * 1 13 5 2 136 * 0 - - - 137 * 138 * which says that the first nine blocks (0-8) are interleaved over 139 * 3 disks (0, 1, 2) starting at block offset 0 on any component disk, 140 * the next 4 blocks (9-12) are interleaved over 2 disks (0, 2) starting 141 * at component block 3, and the remaining blocks (13-14) are on disk 142 * 2 starting at offset 5. 143 */ 144 struct ccdiinfo { 145 int ii_ndisk; /* # of disks range is interleaved over */ 146 daddr_t ii_startblk; /* starting scaled block # for range */ 147 daddr_t ii_startoff; /* starting component offset (block #) */ 148 int *ii_index; /* ordered list of components in range */ 149 }; 150 151 /* 152 * Concatenated disk pseudo-geometry information. 153 */ 154 struct ccdgeom { 155 u_int32_t ccg_secsize; /* # bytes per sector */ 156 u_int32_t ccg_nsectors; /* # data sectors per track */ 157 u_int32_t ccg_ntracks; /* # tracks per cylinder */ 158 u_int32_t ccg_ncylinders; /* # cylinders per unit */ 159 }; 160 161 struct ccdbuf; 162 163 /* 164 * A concatenated disk is described after initialization by this structure. 165 */ 166 struct ccd_softc { 167 int sc_unit; /* logical unit number */ 168 int sc_flags; /* flags */ 169 size_t sc_size; /* size of ccd */ 170 int sc_ileave; /* interleave */ 171 int sc_nccdisks; /* number of components */ 172 struct ccdcinfo *sc_cinfo; /* component info */ 173 struct ccdiinfo *sc_itable; /* interleave table */ 174 struct ccdgeom sc_geom; /* pseudo geometry info */ 175 char sc_xname[8]; /* XXX external name */ 176 struct disk sc_dkdev; /* generic disk device info */ 177 struct pool sc_cbufpool; /* component buffer pool */ 178 struct lock sc_lock; /* lock on this structure */ 179 }; 180 181 /* sc_flags */ 182 #define CCDF_SWAP 0x01 /* interleave should be dmmax */ 183 #define CCDF_UNIFORM 0x02 /* use LCCD of sizes for uniform interleave */ 184 #define CCDF_INITED 0x10 /* unit has been initialized */ 185 #define CCDF_WLABEL 0x20 /* label area is writable */ 186 #define CCDF_LABELLING 0x40 /* unit is currently being labelled */ 187 188 /* Mask of user-settable ccd flags. */ 189 #define CCDF_USERMASK (CCDF_SWAP|CCDF_UNIFORM) 190 191 /* 192 * Before you can use a unit, it must be configured with CCDIOCSET. 193 * The configuration persists across opens and closes of the device; 194 * a CCDIOCCLR must be used to reset a configuration. An attempt to 195 * CCDIOCSET an already active unit will return EBUSY. Attempts to 196 * CCDIOCCLR an inactive unit will return ENXIO. 197 */ 198 #define CCDIOCSET _IOWR('F', 16, struct ccd_ioctl) /* enable ccd */ 199 #define CCDIOCCLR _IOW('F', 17, struct ccd_ioctl) /* disable ccd */ 200
Indexes created Mon Sep 22 21:09:42 GMT 2025