1 /* $NetBSD: rz.c,v 1.17 2000/09/13 04:06:47 simonb 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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)rz.c 8.1 (Berkeley) 6/10/93 39 */ 40 41 #include <lib/libsa/stand.h> 42 #include <machine/dec_prom.h> 43 #include <machine/stdarg.h> 44 45 #include <sys/param.h> 46 #include <sys/disklabel.h> 47 48 #include "common.h" 49 #include "rz.h" 50 51 #define RF_PROTECTED_SECTORS 64 /* XXX refer to <.../rf_optnames.h> */ 52 53 54 struct rz_softc { 55 int sc_fd; /* PROM file id */ 56 int sc_ctlr; /* controller number */ 57 int sc_unit; /* disk unit number */ 58 int sc_part; /* disk partition number */ 59 struct disklabel sc_label; /* disk label for this disk */ 60 }; 61 62 int 63 rzstrategy(devdata, rw, bn, reqcnt, addr, cnt) 64 void *devdata; 65 int rw; 66 daddr_t bn; 67 size_t reqcnt; 68 void *addr; 69 size_t *cnt; /* out: number of bytes transfered */ 70 { 71 struct rz_softc *sc = (struct rz_softc *)devdata; 72 int part = sc->sc_part; 73 struct partition *pp = &sc->sc_label.d_partitions[part]; 74 int s; 75 long offset; 76 77 offset = bn; 78 79 /* 80 * Partial-block transfers not handled. 81 */ 82 if (reqcnt & (DEV_BSIZE - 1)) { 83 *cnt = 0; 84 return (EINVAL); 85 } 86 87 offset += pp->p_offset; 88 89 if (pp->p_fstype == FS_RAID) 90 offset += RF_PROTECTED_SECTORS; 91 92 /* 93 * Convert from blocks to bytes. 94 */ 95 offset *= DEV_BSIZE; 96 97 if (callv == &callvec) { 98 /* No REX on this machine */ 99 if (prom_lseek(sc->sc_fd, offset, 0) < 0) 100 return (EIO); 101 s = prom_read(sc->sc_fd, addr, reqcnt); 102 } else 103 s = bootread (offset / 512, addr, reqcnt); 104 if (s < 0) 105 return (EIO); 106 107 *cnt = s; 108 return (0); 109 } 110 111 int 112 rzopen(struct open_file *f, ...) 113 { 114 int ctlr, unit, part; 115 116 struct rz_softc *sc; 117 struct disklabel *lp; 118 int i; 119 char *msg; 120 char buf[DEV_BSIZE]; 121 int cnt; 122 static char device[] = "rz(0,0,0)"; 123 va_list ap; 124 125 va_start(ap, f); 126 127 ctlr = va_arg(ap, int); 128 unit = va_arg(ap, int); 129 part = va_arg(ap, int); 130 if (unit >= 8 || part >= 8) 131 return (ENXIO); 132 device[5] = '0' + unit; 133 /* NOTE: only support reads for now */ 134 /* Another NOTE: bootinit on the TurboChannel doesn't look at 135 the device string - it's provided for compatibility with 136 the DS3100 PROMs. As a consequence, it may be possible to 137 boot from some other drive with these bootblocks on the 3100, 138 but will not be possible on any TurboChannel machine. */ 139 140 if (callv == &callvec) 141 i = prom_open(device, 0); 142 else 143 i = bootinit (device); 144 if (i < 0) { 145 printf("open failed\n"); 146 return (ENXIO); 147 } 148 149 sc = alloc(sizeof(struct rz_softc)); 150 memset(sc, 0, sizeof(struct rz_softc)); 151 f->f_devdata = (void *)sc; 152 153 sc->sc_fd = i; 154 sc->sc_ctlr = ctlr; 155 sc->sc_unit = unit; 156 sc->sc_part = part; 157 158 /* try to read disk label and partition table information */ 159 lp = &sc->sc_label; 160 lp->d_secsize = DEV_BSIZE; 161 lp->d_secpercyl = 1; 162 lp->d_npartitions = MAXPARTITIONS; 163 lp->d_partitions[part].p_offset = 0; 164 lp->d_partitions[part].p_size = 0x7fffffff; 165 166 i = rzstrategy(sc, F_READ, (daddr_t)LABELSECTOR, DEV_BSIZE, buf, &cnt); 167 if (i || cnt != DEV_BSIZE) { 168 /* printf("rz%d: error reading disk label\n", unit); */ 169 goto bad; 170 } 171 msg = getdisklabel(buf, lp); 172 if (msg) { 173 /* If no label, just assume 0 and return */ 174 return (0); 175 } 176 177 if (part >= lp->d_npartitions || lp->d_partitions[part].p_size == 0) { 178 bad: 179 free(sc, sizeof(struct rz_softc)); 180 return (ENXIO); 181 } 182 return (0); 183 } 184 185 #ifndef LIBSA_NO_DEV_CLOSE 186 int 187 rzclose(f) 188 struct open_file *f; 189 { 190 if (callv == &callvec) 191 prom_close(((struct rz_softc *)f->f_devdata)->sc_fd); 192 193 free(f->f_devdata, sizeof(struct rz_softc)); 194 f->f_devdata = (void *)0; 195 return (0); 196 } 197 #endif 198