ccdvar.h revision 1.29.42.1
1 /* $NetBSD: ccdvar.h,v 1.29.42.1 2008/05/18 12:33:30 yamt Exp $ */ 2 3 /*- 4 * Copyright (c) 1996, 1997, 1998, 1999, 2007 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1990, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * This code is derived from software contributed to Berkeley by 37 * the Systems Programming Group of the University of Utah Computer 38 * Science Department. 39 * 40 * Redistribution and use in source and binary forms, with or without 41 * modification, are permitted provided that the following conditions 42 * are met: 43 * 1. Redistributions of source code must retain the above copyright 44 * notice, this list of conditions and the following disclaimer. 45 * 2. Redistributions in binary form must reproduce the above copyright 46 * notice, this list of conditions and the following disclaimer in the 47 * documentation and/or other materials provided with the distribution. 48 * 3. Neither the name of the University nor the names of its contributors 49 * may be used to endorse or promote products derived from this software 50 * without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 62 * SUCH DAMAGE. 63 * 64 * from: Utah $Hdr: cdvar.h 1.1 90/07/09$ 65 * 66 * @(#)cdvar.h 8.1 (Berkeley) 6/10/93 67 */ 68 69 /* 70 * Copyright (c) 1988 University of Utah. 71 * 72 * This code is derived from software contributed to Berkeley by 73 * the Systems Programming Group of the University of Utah Computer 74 * Science Department. 75 * 76 * Redistribution and use in source and binary forms, with or without 77 * modification, are permitted provided that the following conditions 78 * are met: 79 * 1. Redistributions of source code must retain the above copyright 80 * notice, this list of conditions and the following disclaimer. 81 * 2. Redistributions in binary form must reproduce the above copyright 82 * notice, this list of conditions and the following disclaimer in the 83 * documentation and/or other materials provided with the distribution. 84 * 3. All advertising materials mentioning features or use of this software 85 * must display the following acknowledgement: 86 * This product includes software developed by the University of 87 * California, Berkeley and its contributors. 88 * 4. Neither the name of the University nor the names of its contributors 89 * may be used to endorse or promote products derived from this software 90 * without specific prior written permission. 91 * 92 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 93 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 95 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 96 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 97 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 98 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 99 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 100 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 101 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 102 * SUCH DAMAGE. 103 * 104 * from: Utah $Hdr: cdvar.h 1.1 90/07/09$ 105 * 106 * @(#)cdvar.h 8.1 (Berkeley) 6/10/93 107 */ 108 109 #ifndef _DEV_CCDVAR_H_ 110 #define _DEV_CCDVAR_H_ 111 112 #include <sys/buf.h> 113 #include <sys/mutex.h> 114 #include <sys/queue.h> 115 116 /* 117 * Dynamic configuration and disklabel support by: 118 * Jason R. Thorpe <thorpej (at) nas.nasa.gov> 119 * Numerical Aerodynamic Simulation Facility 120 * Mail Stop 258-6 121 * NASA Ames Research Center 122 * Moffett Field, CA 94035 123 */ 124 125 /* 126 * This structure is used to configure a ccd via ioctl(2). 127 */ 128 struct ccd_ioctl { 129 char **ccio_disks; /* pointer to component paths */ 130 u_int ccio_ndisks; /* number of disks to concatenate */ 131 int ccio_ileave; /* interleave (DEV_BSIZE blocks) */ 132 int ccio_flags; /* see sc_flags below */ 133 int ccio_unit; /* unit number: use varies */ 134 size_t ccio_size; /* (returned) size of ccd */ 135 }; 136 137 /* 138 * Component info table. 139 * Describes a single component of a concatenated disk. 140 */ 141 struct ccdcinfo { 142 struct vnode *ci_vp; /* device's vnode */ 143 dev_t ci_dev; /* XXX: device's dev_t */ 144 size_t ci_size; /* size */ 145 char *ci_path; /* path to component */ 146 size_t ci_pathlen; /* length of component path */ 147 }; 148 149 /* 150 * Interleave description table. 151 * Computed at boot time to speed irregular-interleave lookups. 152 * The idea is that we interleave in "groups". First we interleave 153 * evenly over all component disks up to the size of the smallest 154 * component (the first group), then we interleave evenly over all 155 * remaining disks up to the size of the next-smallest (second group), 156 * and so on. 157 * 158 * Each table entry describes the interleave characteristics of one 159 * of these groups. For example if a concatenated disk consisted of 160 * three components of 5, 3, and 7 DEV_BSIZE blocks interleaved at 161 * DEV_BSIZE (1), the table would have three entries: 162 * 163 * ndisk startblk startoff dev 164 * 3 0 0 0, 1, 2 165 * 2 9 3 0, 2 166 * 1 13 5 2 167 * 0 - - - 168 * 169 * which says that the first nine blocks (0-8) are interleaved over 170 * 3 disks (0, 1, 2) starting at block offset 0 on any component disk, 171 * the next 4 blocks (9-12) are interleaved over 2 disks (0, 2) starting 172 * at component block 3, and the remaining blocks (13-14) are on disk 173 * 2 starting at offset 5. 174 */ 175 struct ccdiinfo { 176 int ii_ndisk; /* # of disks range is interleaved over */ 177 daddr_t ii_startblk; /* starting scaled block # for range */ 178 daddr_t ii_startoff; /* starting component offset (block #) */ 179 int *ii_index; /* ordered list of components in range */ 180 }; 181 182 /* 183 * Concatenated disk pseudo-geometry information. 184 */ 185 struct ccdgeom { 186 u_int32_t ccg_secsize; /* # bytes per sector */ 187 u_int32_t ccg_nsectors; /* # data sectors per track */ 188 u_int32_t ccg_ntracks; /* # tracks per cylinder */ 189 u_int32_t ccg_ncylinders; /* # cylinders per unit */ 190 }; 191 192 struct ccdbuf; 193 194 /* 195 * A concatenated disk is described after initialization by this structure. 196 */ 197 struct ccd_softc { 198 int sc_flags; /* flags */ 199 size_t sc_size; /* size of ccd */ 200 int sc_ileave; /* interleave */ 201 u_int sc_nccdisks; /* number of components */ 202 #define CCD_MAXNDISKS 65536 203 struct ccdcinfo *sc_cinfo; /* component info */ 204 struct ccdiinfo *sc_itable; /* interleave table */ 205 struct ccdgeom sc_geom; /* pseudo geometry info */ 206 char sc_xname[8]; /* XXX external name */ 207 struct disk sc_dkdev; /* generic disk device info */ 208 kmutex_t sc_lock; /* lock on this structure */ 209 #if defined(_KERNEL) /* XXX ccdconfig(8) refers softc directly using kvm */ 210 struct bufq_state *sc_bufq; /* buffer queue */ 211 #endif 212 }; 213 214 /* sc_flags */ 215 #define CCDF_UNIFORM 0x002 /* use LCCD of sizes for uniform interleave */ 216 #define CCDF_NOLABEL 0x004 /* ignore on-disk (raw) disklabel */ 217 218 #define CCDF_INITED 0x010 /* unit has been initialized */ 219 #define CCDF_WLABEL 0x020 /* label area is writable */ 220 #define CCDF_LABELLING 0x040 /* unit is currently being labelled */ 221 #define CCDF_KLABEL 0x080 /* keep label on close */ 222 #define CCDF_VLABEL 0x100 /* label is valid */ 223 224 /* Mask of user-settable ccd flags. */ 225 #define CCDF_USERMASK (CCDF_UNIFORM|CCDF_NOLABEL) 226 227 /* 228 * Before you can use a unit, it must be configured with CCDIOCSET. 229 * The configuration persists across opens and closes of the device; 230 * a CCDIOCCLR must be used to reset a configuration. An attempt to 231 * CCDIOCSET an already active unit will return EBUSY. Attempts to 232 * CCDIOCCLR an inactive unit will return ENXIO. 233 */ 234 #define CCDIOCSET _IOWR('F', 16, struct ccd_ioctl) /* enable ccd */ 235 #define CCDIOCCLR _IOW('F', 17, struct ccd_ioctl) /* disable ccd */ 236 237 #endif /* _DEV_CCDVAR_H_ */ 238
Indexes created Mon Oct 13 04:09:54 GMT 2025