1 /* $NetBSD: rz.c,v 1.19 2002/12/09 12:14:10 jdolecek 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 <lib/libkern/libkern.h> 43 #include <machine/dec_prom.h> 44 #include <machine/stdarg.h> 45 46 #include <sys/param.h> 47 #include <sys/disklabel.h> 48 49 #include "common.h" 50 #include "rz.h" 51 52 #define RF_PROTECTED_SECTORS 64 /* XXX refer to <.../rf_optnames.h> */ 53 54 55 struct rz_softc { 56 int sc_fd; /* PROM file id */ 57 int sc_ctlr; /* controller number */ 58 int sc_unit; /* disk unit number */ 59 int sc_part; /* disk partition number */ 60 struct disklabel sc_label; /* disk label for this disk */ 61 }; 62 63 int 64 rzstrategy(devdata, rw, bn, reqcnt, addr, cnt) 65 void *devdata; 66 int rw; 67 daddr_t bn; 68 size_t reqcnt; 69 void *addr; 70 size_t *cnt; /* out: number of bytes transfered */ 71 { 72 struct rz_softc *sc = (struct rz_softc *)devdata; 73 int part = sc->sc_part; 74 struct partition *pp = &sc->sc_label.d_partitions[part]; 75 int s; 76 long offset; 77 78 offset = bn; 79 80 /* 81 * Partial-block transfers not handled. 82 */ 83 if (reqcnt & (DEV_BSIZE - 1)) { 84 *cnt = 0; 85 return (EINVAL); 86 } 87 88 offset += pp->p_offset; 89 90 if (pp->p_fstype == FS_RAID) 91 offset += RF_PROTECTED_SECTORS; 92 93 /* 94 * Convert from blocks to bytes. 95 */ 96 offset *= DEV_BSIZE; 97 98 if (callv == &callvec) { 99 /* No REX on this machine */ 100 if (prom_lseek(sc->sc_fd, offset, 0) < 0) 101 return (EIO); 102 s = prom_read(sc->sc_fd, addr, reqcnt); 103 } else 104 s = bootread (offset / 512, addr, reqcnt); 105 if (s < 0) 106 return (EIO); 107 108 *cnt = s; 109 return (0); 110 } 111 112 int 113 rzopen(struct open_file *f, ...) 114 { 115 int ctlr, unit, part; 116 117 struct rz_softc *sc; 118 struct disklabel *lp; 119 int i; 120 char *msg; 121 char buf[DEV_BSIZE]; 122 int cnt; 123 static char device[] = "rz(0,0,0)"; 124 va_list ap; 125 126 va_start(ap, f); 127 128 ctlr = va_arg(ap, int); 129 unit = va_arg(ap, int); 130 part = va_arg(ap, int); 131 va_end(ap); 132 if (unit >= 8 || part >= 8) 133 return (ENXIO); 134 device[5] = '0' + unit; 135 /* NOTE: only support reads for now */ 136 /* Another NOTE: bootinit on the TurboChannel doesn't look at 137 the device string - it's provided for compatibility with 138 the DS3100 PROMs. As a consequence, it may be possible to 139 boot from some other drive with these bootblocks on the 3100, 140 but will not be possible on any TurboChannel machine. */ 141 142 if (callv == &callvec) 143 i = prom_open(device, 0); 144 else 145 i = bootinit (device); 146 if (i < 0) { 147 printf("open failed\n"); 148 return (ENXIO); 149 } 150 151 sc = alloc(sizeof(struct rz_softc)); 152 memset(sc, 0, sizeof(struct rz_softc)); 153 f->f_devdata = (void *)sc; 154 155 sc->sc_fd = i; 156 sc->sc_ctlr = ctlr; 157 sc->sc_unit = unit; 158 sc->sc_part = part; 159 160 /* try to read disk label and partition table information */ 161 lp = &sc->sc_label; 162 lp->d_secsize = DEV_BSIZE; 163 lp->d_secpercyl = 1; 164 lp->d_npartitions = MAXPARTITIONS; 165 lp->d_partitions[part].p_offset = 0; 166 lp->d_partitions[part].p_size = 0x7fffffff; 167 168 i = rzstrategy(sc, F_READ, (daddr_t)LABELSECTOR, DEV_BSIZE, buf, &cnt); 169 if (i || cnt != DEV_BSIZE) { 170 /* printf("rz%d: error reading disk label\n", unit); */ 171 goto bad; 172 } 173 msg = getdisklabel(buf, lp); 174 if (msg) { 175 /* If no label, just assume 0 and return */ 176 return (0); 177 } 178 179 if (part >= lp->d_npartitions || lp->d_partitions[part].p_size == 0) { 180 bad: 181 free(sc, sizeof(struct rz_softc)); 182 return (ENXIO); 183 } 184 return (0); 185 } 186 187 #ifndef LIBSA_NO_DEV_CLOSE 188 int 189 rzclose(f) 190 struct open_file *f; 191 { 192 if (callv == &callvec) 193 prom_close(((struct rz_softc *)f->f_devdata)->sc_fd); 194 195 free(f->f_devdata, sizeof(struct rz_softc)); 196 f->f_devdata = (void *)0; 197 return (0); 198 } 199 #endif 200