1 /* $NetBSD: rz.c,v 1.20 2003/08/07 16:29:15 agc Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Van Jacobson of Lawrence Berkeley Laboratory and Ralph Campbell. 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. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)rz.c 8.1 (Berkeley) 6/10/93 35 */ 36 37 #include <lib/libsa/stand.h> 38 #include <lib/libkern/libkern.h> 39 #include <machine/dec_prom.h> 40 #include <machine/stdarg.h> 41 42 #include <sys/param.h> 43 #include <sys/disklabel.h> 44 45 #include "common.h" 46 #include "rz.h" 47 48 #define RF_PROTECTED_SECTORS 64 /* XXX refer to <.../rf_optnames.h> */ 49 50 51 struct rz_softc { 52 int sc_fd; /* PROM file id */ 53 int sc_ctlr; /* controller number */ 54 int sc_unit; /* disk unit number */ 55 int sc_part; /* disk partition number */ 56 struct disklabel sc_label; /* disk label for this disk */ 57 }; 58 59 int 60 rzstrategy(devdata, rw, bn, reqcnt, addr, cnt) 61 void *devdata; 62 int rw; 63 daddr_t bn; 64 size_t reqcnt; 65 void *addr; 66 size_t *cnt; /* out: number of bytes transfered */ 67 { 68 struct rz_softc *sc = (struct rz_softc *)devdata; 69 int part = sc->sc_part; 70 struct partition *pp = &sc->sc_label.d_partitions[part]; 71 int s; 72 long offset; 73 74 offset = bn; 75 76 /* 77 * Partial-block transfers not handled. 78 */ 79 if (reqcnt & (DEV_BSIZE - 1)) { 80 *cnt = 0; 81 return (EINVAL); 82 } 83 84 offset += pp->p_offset; 85 86 if (pp->p_fstype == FS_RAID) 87 offset += RF_PROTECTED_SECTORS; 88 89 /* 90 * Convert from blocks to bytes. 91 */ 92 offset *= DEV_BSIZE; 93 94 if (callv == &callvec) { 95 /* No REX on this machine */ 96 if (prom_lseek(sc->sc_fd, offset, 0) < 0) 97 return (EIO); 98 s = prom_read(sc->sc_fd, addr, reqcnt); 99 } else 100 s = bootread (offset / 512, addr, reqcnt); 101 if (s < 0) 102 return (EIO); 103 104 *cnt = s; 105 return (0); 106 } 107 108 int 109 rzopen(struct open_file *f, ...) 110 { 111 int ctlr, unit, part; 112 113 struct rz_softc *sc; 114 struct disklabel *lp; 115 int i; 116 char *msg; 117 char buf[DEV_BSIZE]; 118 int cnt; 119 static char device[] = "rz(0,0,0)"; 120 va_list ap; 121 122 va_start(ap, f); 123 124 ctlr = va_arg(ap, int); 125 unit = va_arg(ap, int); 126 part = va_arg(ap, int); 127 va_end(ap); 128 if (unit >= 8 || part >= 8) 129 return (ENXIO); 130 device[5] = '0' + unit; 131 /* NOTE: only support reads for now */ 132 /* Another NOTE: bootinit on the TurboChannel doesn't look at 133 the device string - it's provided for compatibility with 134 the DS3100 PROMs. As a consequence, it may be possible to 135 boot from some other drive with these bootblocks on the 3100, 136 but will not be possible on any TurboChannel machine. */ 137 138 if (callv == &callvec) 139 i = prom_open(device, 0); 140 else 141 i = bootinit (device); 142 if (i < 0) { 143 printf("open failed\n"); 144 return (ENXIO); 145 } 146 147 sc = alloc(sizeof(struct rz_softc)); 148 memset(sc, 0, sizeof(struct rz_softc)); 149 f->f_devdata = (void *)sc; 150 151 sc->sc_fd = i; 152 sc->sc_ctlr = ctlr; 153 sc->sc_unit = unit; 154 sc->sc_part = part; 155 156 /* try to read disk label and partition table information */ 157 lp = &sc->sc_label; 158 lp->d_secsize = DEV_BSIZE; 159 lp->d_secpercyl = 1; 160 lp->d_npartitions = MAXPARTITIONS; 161 lp->d_partitions[part].p_offset = 0; 162 lp->d_partitions[part].p_size = 0x7fffffff; 163 164 i = rzstrategy(sc, F_READ, (daddr_t)LABELSECTOR, DEV_BSIZE, buf, &cnt); 165 if (i || cnt != DEV_BSIZE) { 166 /* printf("rz%d: error reading disk label\n", unit); */ 167 goto bad; 168 } 169 msg = getdisklabel(buf, lp); 170 if (msg) { 171 /* If no label, just assume 0 and return */ 172 return (0); 173 } 174 175 if (part >= lp->d_npartitions || lp->d_partitions[part].p_size == 0) { 176 bad: 177 free(sc, sizeof(struct rz_softc)); 178 return (ENXIO); 179 } 180 return (0); 181 } 182 183 #ifndef LIBSA_NO_DEV_CLOSE 184 int 185 rzclose(f) 186 struct open_file *f; 187 { 188 if (callv == &callvec) 189 prom_close(((struct rz_softc *)f->f_devdata)->sc_fd); 190 191 free(f->f_devdata, sizeof(struct rz_softc)); 192 f->f_devdata = (void *)0; 193 return (0); 194 } 195 #endif 196