1 /* $NetBSD: rz.c,v 1.16 2000/03/30 14:45:11 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 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 * DEV_BSIZE; 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 * DEV_BSIZE; 85 86 if (callv == &callvec) { 87 /* No REX on this machine */ 88 if (prom_lseek(sc->sc_fd, offset, 0) < 0) 89 return (EIO); 90 s = prom_read(sc->sc_fd, addr, reqcnt); 91 } else 92 s = bootread (offset / 512, addr, reqcnt); 93 if (s < 0) 94 return (EIO); 95 96 *cnt = s; 97 return (0); 98 } 99 100 int 101 rzopen(struct open_file *f, ...) 102 { 103 int ctlr, unit, part; 104 105 struct rz_softc *sc; 106 struct disklabel *lp; 107 int i; 108 char *msg; 109 char buf[DEV_BSIZE]; 110 int cnt; 111 static char device[] = "rz(0,0,0)"; 112 va_list ap; 113 114 va_start(ap, f); 115 116 ctlr = va_arg(ap, int); 117 unit = va_arg(ap, int); 118 part = va_arg(ap, int); 119 if (unit >= 8 || part >= 8) 120 return (ENXIO); 121 device[5] = '0' + unit; 122 /* NOTE: only support reads for now */ 123 /* Another NOTE: bootinit on the TurboChannel doesn't look at 124 the device string - it's provided for compatibility with 125 the DS3100 PROMs. As a consequence, it may be possible to 126 boot from some other drive with these bootblocks on the 3100, 127 but will not be possible on any TurboChannel machine. */ 128 129 if (callv == &callvec) 130 i = prom_open(device, 0); 131 else 132 i = bootinit (device); 133 if (i < 0) { 134 printf("open failed\n"); 135 return (ENXIO); 136 } 137 138 sc = alloc(sizeof(struct rz_softc)); 139 memset(sc, 0, sizeof(struct rz_softc)); 140 f->f_devdata = (void *)sc; 141 142 sc->sc_fd = i; 143 sc->sc_ctlr = ctlr; 144 sc->sc_unit = unit; 145 sc->sc_part = part; 146 147 /* try to read disk label and partition table information */ 148 lp = &sc->sc_label; 149 lp->d_secsize = DEV_BSIZE; 150 lp->d_secpercyl = 1; 151 lp->d_npartitions = MAXPARTITIONS; 152 lp->d_partitions[part].p_offset = 0; 153 lp->d_partitions[part].p_size = 0x7fffffff; 154 155 i = rzstrategy(sc, F_READ, (daddr_t)LABELSECTOR, DEV_BSIZE, buf, &cnt); 156 if (i || cnt != DEV_BSIZE) { 157 /* printf("rz%d: error reading disk label\n", unit); */ 158 goto bad; 159 } 160 msg = getdisklabel(buf, lp); 161 if (msg) { 162 /* If no label, just assume 0 and return */ 163 return (0); 164 } 165 166 if (part >= lp->d_npartitions || lp->d_partitions[part].p_size == 0) { 167 bad: 168 free(sc, sizeof(struct rz_softc)); 169 return (ENXIO); 170 } 171 return (0); 172 } 173 174 #ifndef LIBSA_NO_DEV_CLOSE 175 int 176 rzclose(f) 177 struct open_file *f; 178 { 179 if (callv == &callvec) 180 prom_close(((struct rz_softc *)f->f_devdata)->sc_fd); 181 182 free(f->f_devdata, sizeof(struct rz_softc)); 183 f->f_devdata = (void *)0; 184 return (0); 185 } 186 #endif 187