disk.c revision 1.1
1 /* $NetBSD: disk.c,v 1.1 2001/11/21 19:09:10 thorpej 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 * @(#)disk.c 8.1 (Berkeley) 6/10/93 39 */ 40 41 #include <lib/libsa/stand.h> 42 #include <machine/stdarg.h> 43 44 #include <sys/param.h> 45 #include <sys/disklabel.h> 46 47 #include <dev/arcbios/arcbios.h> 48 49 #include "common.h" 50 #include "disk.h" 51 52 #define RF_PROTECTED_SECTORS 64 /* XXX refer to <.../rf_optnames.h> */ 53 54 extern const struct arcbios_fv *ARCBIOS; 55 56 struct disk_softc { 57 int sc_fd; /* PROM file id */ 58 int sc_ctlr; /* controller number */ 59 int sc_unit; /* disk unit number */ 60 int sc_part; /* disk partition number */ 61 struct disklabel sc_label; /* disk label for this disk */ 62 }; 63 64 int 65 diskstrategy(devdata, rw, bn, reqcnt, addr, cnt) 66 void *devdata; 67 int rw; 68 daddr_t bn; 69 size_t reqcnt; 70 void *addr; 71 size_t *cnt; /* out: number of bytes transfered */ 72 { 73 struct disk_softc *sc = (struct disk_softc *)devdata; 74 int part = sc->sc_part; 75 struct partition *pp = &sc->sc_label.d_partitions[part]; 76 int s; 77 int64_t offset; 78 int count; 79 80 offset = bn; 81 82 /* 83 * Partial-block transfers not handled. 84 */ 85 if (reqcnt & (DEV_BSIZE - 1)) { 86 *cnt = 0; 87 return (EINVAL); 88 } 89 90 offset += pp->p_offset; 91 92 if (pp->p_fstype == FS_RAID) 93 offset += RF_PROTECTED_SECTORS; 94 95 /* 96 * Convert from blocks to bytes. 97 */ 98 offset *= DEV_BSIZE; 99 100 s = ARCBIOS->Seek(sc->sc_fd, &offset, 0); 101 s = ARCBIOS->Read(sc->sc_fd, addr, reqcnt, &count); 102 103 if (s < 0) 104 return (EIO); 105 106 *cnt = count; 107 return (0); 108 } 109 110 int 111 diskopen(struct open_file *f, ...) 112 { 113 int ctlr, unit, part; 114 115 struct disk_softc *sc; 116 struct disklabel *lp; 117 int i; 118 char *msg; 119 char buf[DEV_BSIZE]; 120 int cnt; 121 char *device; 122 va_list ap; 123 124 va_start(ap, f); 125 126 device = va_arg(ap, char *); 127 ctlr = 0; /* XXX extract from filename */ 128 unit = 1; 129 part = 0; 130 if (unit >= 16 || part >= 16) 131 return (ENXIO); 132 printf("diskopen: %d,%d,%d %s\n", ctlr, unit, part, device); 133 /* NOTE: only support reads for now */ 134 135 if (ARCBIOS->Open(device, 0, &i)) { 136 printf("open failed\n"); 137 return (ENXIO); 138 } 139 140 sc = alloc(sizeof(struct disk_softc)); 141 memset(sc, 0, sizeof(struct disk_softc)); 142 f->f_devdata = (void *)sc; 143 144 sc->sc_fd = i; 145 sc->sc_ctlr = ctlr; 146 sc->sc_unit = unit; 147 sc->sc_part = part; 148 149 /* try to read disk label and partition table information */ 150 lp = &sc->sc_label; 151 lp->d_secsize = DEV_BSIZE; 152 lp->d_secpercyl = 1; 153 lp->d_npartitions = MAXPARTITIONS; 154 lp->d_partitions[part].p_offset = 0; 155 lp->d_partitions[part].p_size = 0x7fffffff; 156 157 i = diskstrategy(sc, F_READ, (daddr_t)LABELSECTOR, DEV_BSIZE, buf, &cnt); 158 if (i || cnt != DEV_BSIZE) { 159 /* printf("disk%d: error reading disk label\n", unit); */ 160 goto bad; 161 } 162 msg = getdisklabel(buf, lp); 163 if (msg) { 164 /* If no label, just assume 0 and return */ 165 return (0); 166 } 167 168 if (part >= lp->d_npartitions || lp->d_partitions[part].p_size == 0) { 169 bad: 170 free(sc, sizeof(struct disk_softc)); 171 return (ENXIO); 172 } 173 return (0); 174 } 175 176 #ifndef LIBSA_NO_DEV_CLOSE 177 int 178 diskclose(f) 179 struct open_file *f; 180 { 181 ARCBIOS->Close(((struct disk_softc *)(f->f_devdata))->sc_fd); 182 free(f->f_devdata, sizeof(struct disk_softc)); 183 f->f_devdata = (void *)0; 184 return (0); 185 } 186 #endif 187
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