1 /* $NetBSD: rz.c,v 1.25 2009/03/14 21:04:14 dsl 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(void *devdata, int rw, daddr_t bn, size_t reqcnt, void *addr, size_t *cnt) 61 /* cnt: out: number of bytes transfered */ 62 { 63 struct rz_softc *sc = (struct rz_softc *)devdata; 64 int part = sc->sc_part; 65 struct partition *pp = &sc->sc_label.d_partitions[part]; 66 int s; 67 long offset; 68 69 offset = bn; 70 71 /* 72 * Partial-block transfers not handled. 73 */ 74 if (reqcnt & (DEV_BSIZE - 1)) { 75 *cnt = 0; 76 return (EINVAL); 77 } 78 79 offset += pp->p_offset; 80 81 if (pp->p_fstype == FS_RAID) 82 offset += RF_PROTECTED_SECTORS; 83 84 /* 85 * Convert from blocks to bytes. 86 */ 87 offset *= DEV_BSIZE; 88 89 if (callv == &callvec) { 90 /* No REX on this machine */ 91 if (prom_lseek(sc->sc_fd, offset, 0) < 0) 92 return (EIO); 93 s = prom_read(sc->sc_fd, addr, reqcnt); 94 } else 95 s = bootread (offset / 512, addr, reqcnt); 96 if (s < 0) 97 return (EIO); 98 99 *cnt = s; 100 return (0); 101 } 102 103 int 104 rzopen(struct open_file *f, ...) 105 { 106 int ctlr, unit, part; 107 108 struct rz_softc *sc; 109 struct disklabel *lp; 110 int i; 111 char *msg; 112 char buf[DEV_BSIZE]; 113 size_t cnt; 114 static char device[] = "rz(0,0,0)"; 115 va_list ap; 116 117 va_start(ap, f); 118 119 ctlr = va_arg(ap, int); 120 unit = va_arg(ap, int); 121 part = va_arg(ap, int); 122 va_end(ap); 123 if (unit >= 8 || part >= 8) 124 return (ENXIO); 125 device[5] = '0' + unit; 126 /* NOTE: only support reads for now */ 127 /* Another NOTE: bootinit on the TurboChannel doesn't look at 128 the device string - it's provided for compatibility with 129 the DS3100 PROMs. As a consequence, it may be possible to 130 boot from some other drive with these bootblocks on the 3100, 131 but will not be possible on any TurboChannel machine. */ 132 133 if (callv == &callvec) 134 i = prom_open(device, 0); 135 else 136 i = bootinit (device); 137 if (i < 0) { 138 printf("open failed\n"); 139 return (ENXIO); 140 } 141 142 sc = alloc(sizeof(struct rz_softc)); 143 memset(sc, 0, sizeof(struct rz_softc)); 144 f->f_devdata = (void *)sc; 145 146 sc->sc_fd = i; 147 sc->sc_ctlr = ctlr; 148 sc->sc_unit = unit; 149 sc->sc_part = part; 150 151 /* try to read disk label and partition table information */ 152 lp = &sc->sc_label; 153 lp->d_secsize = DEV_BSIZE; 154 lp->d_secpercyl = 1; 155 lp->d_npartitions = MAXPARTITIONS; 156 lp->d_partitions[part].p_offset = 0; 157 lp->d_partitions[part].p_size = 0x7fffffff; 158 159 i = rzstrategy(sc, F_READ, (daddr_t)LABELSECTOR, DEV_BSIZE, buf, &cnt); 160 if (i || cnt != DEV_BSIZE) { 161 /* printf("rz%d: error reading disk label\n", unit); */ 162 goto bad; 163 } 164 msg = getdisklabel(buf, lp); 165 if (msg) { 166 /* If no label, just assume 0 and return */ 167 return (0); 168 } 169 170 if (part >= lp->d_npartitions || lp->d_partitions[part].p_size == 0) { 171 bad: 172 dealloc(sc, sizeof(struct rz_softc)); 173 return (ENXIO); 174 } 175 return (0); 176 } 177 178 #ifndef LIBSA_NO_DEV_CLOSE 179 int 180 rzclose(struct open_file *f) 181 { 182 if (callv == &callvec) 183 prom_close(((struct rz_softc *)f->f_devdata)->sc_fd); 184 185 dealloc(f->f_devdata, sizeof(struct rz_softc)); 186 f->f_devdata = (void *)0; 187 return (0); 188 } 189 #endif 190