ccdvar.h revision 1.32
1 /* $NetBSD: ccdvar.h,v 1.32 2011/02/08 20:20:26 rmind Exp $ */ 2 3 /*- 4 * Copyright (c) 1996, 1997, 1998, 1999, 2007, 2009 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) 1988 University of Utah. 34 * Copyright (c) 1990, 1993 35 * The Regents of the University of California. All rights reserved. 36 * 37 * This code is derived from software contributed to Berkeley by 38 * the Systems Programming Group of the University of Utah Computer 39 * Science Department. 40 * 41 * Redistribution and use in source and binary forms, with or without 42 * modification, are permitted provided that the following conditions 43 * are met: 44 * 1. Redistributions of source code must retain the above copyright 45 * notice, this list of conditions and the following disclaimer. 46 * 2. Redistributions in binary form must reproduce the above copyright 47 * notice, this list of conditions and the following disclaimer in the 48 * documentation and/or other materials provided with the distribution. 49 * 3. Neither the name of the University nor the names of its contributors 50 * may be used to endorse or promote products derived from this software 51 * without specific prior written permission. 52 * 53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 63 * SUCH DAMAGE. 64 * 65 * from: Utah $Hdr: cdvar.h 1.1 90/07/09$ 66 * 67 * @(#)cdvar.h 8.1 (Berkeley) 6/10/93 68 */ 69 70 #ifndef _DEV_CCDVAR_H_ 71 #define _DEV_CCDVAR_H_ 72 73 #include <sys/buf.h> 74 #include <sys/mutex.h> 75 #include <sys/queue.h> 76 #include <sys/condvar.h> 77 78 /* 79 * Dynamic configuration and disklabel support by: 80 * Jason R. Thorpe <thorpej (at) nas.nasa.gov> 81 * Numerical Aerodynamic Simulation Facility 82 * Mail Stop 258-6 83 * NASA Ames Research Center 84 * Moffett Field, CA 94035 85 */ 86 87 /* 88 * This structure is used to configure a ccd via ioctl(2). 89 */ 90 struct ccd_ioctl { 91 char **ccio_disks; /* pointer to component paths */ 92 u_int ccio_ndisks; /* number of disks to concatenate */ 93 int ccio_ileave; /* interleave (DEV_BSIZE blocks) */ 94 int ccio_flags; /* see sc_flags below */ 95 int ccio_unit; /* unit number: use varies */ 96 size_t ccio_size; /* (returned) size of ccd */ 97 }; 98 99 /* 100 * Component info table. 101 * Describes a single component of a concatenated disk. 102 */ 103 struct ccdcinfo { 104 struct vnode *ci_vp; /* device's vnode */ 105 dev_t ci_dev; /* XXX: device's dev_t */ 106 size_t ci_size; /* size */ 107 char *ci_path; /* path to component */ 108 size_t ci_pathlen; /* length of component path */ 109 }; 110 111 /* 112 * Interleave description table. 113 * Computed at boot time to speed irregular-interleave lookups. 114 * The idea is that we interleave in "groups". First we interleave 115 * evenly over all component disks up to the size of the smallest 116 * component (the first group), then we interleave evenly over all 117 * remaining disks up to the size of the next-smallest (second group), 118 * and so on. 119 * 120 * Each table entry describes the interleave characteristics of one 121 * of these groups. For example if a concatenated disk consisted of 122 * three components of 5, 3, and 7 DEV_BSIZE blocks interleaved at 123 * DEV_BSIZE (1), the table would have three entries: 124 * 125 * ndisk startblk startoff dev 126 * 3 0 0 0, 1, 2 127 * 2 9 3 0, 2 128 * 1 13 5 2 129 * 0 - - - 130 * 131 * which says that the first nine blocks (0-8) are interleaved over 132 * 3 disks (0, 1, 2) starting at block offset 0 on any component disk, 133 * the next 4 blocks (9-12) are interleaved over 2 disks (0, 2) starting 134 * at component block 3, and the remaining blocks (13-14) are on disk 135 * 2 starting at offset 5. 136 */ 137 struct ccdiinfo { 138 int ii_ndisk; /* # of disks range is interleaved over */ 139 daddr_t ii_startblk; /* starting scaled block # for range */ 140 daddr_t ii_startoff; /* starting component offset (block #) */ 141 int *ii_index; /* ordered list of components in range */ 142 size_t ii_indexsz; /* size of memory area */ 143 }; 144 145 /* 146 * Concatenated disk pseudo-geometry information. 147 */ 148 struct ccdgeom { 149 u_int32_t ccg_secsize; /* # bytes per sector */ 150 u_int32_t ccg_nsectors; /* # data sectors per track */ 151 u_int32_t ccg_ntracks; /* # tracks per cylinder */ 152 u_int32_t ccg_ncylinders; /* # cylinders per unit */ 153 }; 154 155 struct ccdbuf; 156 157 /* 158 * A concatenated disk is described after initialization by this structure. 159 */ 160 struct ccd_softc { 161 int sc_flags; /* flags */ 162 size_t sc_size; /* size of ccd */ 163 int sc_ileave; /* interleave */ 164 u_int sc_nccdisks; /* number of components */ 165 #define CCD_MAXNDISKS 65536 166 struct ccdcinfo *sc_cinfo; /* component info */ 167 struct ccdiinfo *sc_itable; /* interleave table */ 168 struct ccdgeom sc_geom; /* pseudo geometry info */ 169 char sc_xname[8]; /* XXX external name */ 170 struct disk sc_dkdev; /* generic disk device info */ 171 kmutex_t sc_dvlock; /* lock on device node */ 172 #if defined(_KERNEL) /* XXX ccdconfig(8) refers softc directly using kvm */ 173 struct bufq_state *sc_bufq; /* buffer queue */ 174 kmutex_t *sc_iolock; /* lock on I/O start/stop */ 175 kcondvar_t sc_stop; /* when inflight goes zero */ 176 struct lwp *sc_thread; /* for deferred I/O */ 177 kcondvar_t sc_push; /* for deferred I/O */ 178 bool sc_zap; /* for deferred I/O */ 179 #endif 180 }; 181 182 /* sc_flags */ 183 #define CCDF_UNIFORM 0x002 /* use LCCD of sizes for uniform interleave */ 184 #define CCDF_NOLABEL 0x004 /* ignore on-disk (raw) disklabel */ 185 186 #define CCDF_INITED 0x010 /* unit has been initialized */ 187 #define CCDF_WLABEL 0x020 /* label area is writable */ 188 #define CCDF_LABELLING 0x040 /* unit is currently being labelled */ 189 #define CCDF_KLABEL 0x080 /* keep label on close */ 190 #define CCDF_VLABEL 0x100 /* label is valid */ 191 #define CCDF_RLABEL 0x200 /* currently reading label */ 192 193 /* Mask of user-settable ccd flags. */ 194 #define CCDF_USERMASK (CCDF_UNIFORM|CCDF_NOLABEL) 195 196 /* 197 * Before you can use a unit, it must be configured with CCDIOCSET. 198 * The configuration persists across opens and closes of the device; 199 * a CCDIOCCLR must be used to reset a configuration. An attempt to 200 * CCDIOCSET an already active unit will return EBUSY. Attempts to 201 * CCDIOCCLR an inactive unit will return ENXIO. 202 */ 203 #define CCDIOCSET _IOWR('F', 16, struct ccd_ioctl) /* enable ccd */ 204 #define CCDIOCCLR _IOW('F', 17, struct ccd_ioctl) /* disable ccd */ 205 206 #endif /* _DEV_CCDVAR_H_ */ 207
Indexes created Tue Sep 23 07:09:52 GMT 2025