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 41#include <sys/param.h> 42#include <sys/disklabel.h> 43 44#include "common.h" 45#include "rz.h" 46 47#define RF_PROTECTED_SECTORS 64 /* XXX refer to <.../rf_optnames.h> */ 48 49 50struct rz_softc { 51 int sc_fd; /* PROM file id */ 52 int sc_ctlr; /* controller number */ 53 int sc_unit; /* disk unit number */ 54 int sc_part; /* disk partition number */ 55 struct disklabel sc_label; /* disk label for this disk */ 56}; 57 58int 59rzstrategy(void *devdata, int rw, daddr_t bn, size_t reqcnt, void *addr, size_t *cnt) 60 /* cnt: out: number of bytes transfered */ 61{ 62 struct rz_softc *sc = (struct rz_softc *)devdata; 63 int part = sc->sc_part; 64 struct partition *pp = &sc->sc_label.d_partitions[part]; 65 int s; 66 long offset; 67 68 offset = bn; 69 70 /* 71 * Partial-block transfers not handled. 72 */ 73 if (reqcnt & (DEV_BSIZE - 1)) { 74 *cnt = 0; 75 return (EINVAL); 76 } 77 78 offset += pp->p_offset; 79 80 if (pp->p_fstype == FS_RAID) 81 offset += RF_PROTECTED_SECTORS; 82 83 /* 84 * Convert from blocks to bytes. 85 */ 86 offset *= DEV_BSIZE; 87 88 if (callv == &callvec) { 89 /* No REX on this machine */ 90 if (prom_lseek(sc->sc_fd, offset, 0) < 0) 91 return (EIO); 92 s = prom_read(sc->sc_fd, addr, reqcnt); 93 } else 94 s = bootread (offset / 512, addr, reqcnt); 95 if (s < 0) 96 return (EIO); 97 98 *cnt = s; 99 return (0); 100} 101 102int 103rzopen(struct open_file *f, ...) 104{ 105 int ctlr, unit, part; 106 107 struct rz_softc *sc; 108 struct disklabel *lp; 109 int i; 110 char *msg; 111 char buf[DEV_BSIZE]; 112 size_t cnt; 113 static char device[] = "rz(0,0,0)"; 114 va_list ap; 115 116 va_start(ap, f); 117 118 ctlr = va_arg(ap, int); 119 unit = va_arg(ap, int); 120 part = va_arg(ap, int); 121 va_end(ap); 122 if (unit >= 8 || part >= 8) 123 return (ENXIO); 124 device[5] = '0' + unit; 125 /* NOTE: only support reads for now */ 126 /* Another NOTE: bootinit on the TurboChannel doesn't look at 127 the device string - it's provided for compatibility with 128 the DS3100 PROMs. As a consequence, it may be possible to 129 boot from some other drive with these bootblocks on the 3100, 130 but will not be possible on any TurboChannel machine. */ 131 132 if (callv == &callvec) 133 i = prom_open(device, 0); 134 else 135 i = bootinit (device); 136 if (i < 0) { 137 printf("open failed\n"); 138 return (ENXIO); 139 } 140 141 sc = alloc(sizeof(struct rz_softc)); 142 memset(sc, 0, sizeof(struct rz_softc)); 143 f->f_devdata = (void *)sc; 144 145 sc->sc_fd = i; 146 sc->sc_ctlr = ctlr; 147 sc->sc_unit = unit; 148 sc->sc_part = part; 149 150 /* try to read disk label and partition table information */ 151 lp = &sc->sc_label; 152 lp->d_secsize = DEV_BSIZE; 153 lp->d_secpercyl = 1; 154 lp->d_npartitions = MAXPARTITIONS; 155 lp->d_partitions[part].p_offset = 0; 156 lp->d_partitions[part].p_size = 0x7fffffff; 157 158 i = rzstrategy(sc, F_READ, (daddr_t)LABELSECTOR, DEV_BSIZE, buf, &cnt); 159 if (i || cnt != DEV_BSIZE) { 160 /* printf("rz%d: error reading disk label\n", unit); */ 161 goto bad; 162 } 163 msg = getdisklabel(buf, lp); 164 if (msg) { 165 /* If no label, just assume 0 and return */ 166 return (0); 167 } 168 169 if (part >= lp->d_npartitions || lp->d_partitions[part].p_size == 0) { 170 bad: 171 dealloc(sc, sizeof(struct rz_softc)); 172 return (ENXIO); 173 } 174 return (0); 175} 176 177#ifndef LIBSA_NO_DEV_CLOSE 178int 179rzclose(struct open_file *f) 180{ 181 if (callv == &callvec) 182 prom_close(((struct rz_softc *)f->f_devdata)->sc_fd); 183 184 dealloc(f->f_devdata, sizeof(struct rz_softc)); 185 f->f_devdata = (void *)0; 186 return (0); 187} 188#endif 189