1 /* $NetBSD: disk.c,v 1.2 2001/11/21 23:33:19 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_part; /* disk partition number */ 59 struct disklabel sc_label; /* disk label for this disk */ 60 }; 61 62 int 63 diskstrategy(devdata, rw, bn, reqcnt, addr, cnt) 64 void *devdata; 65 int rw; 66 daddr_t bn; 67 size_t reqcnt; 68 void *addr; 69 size_t *cnt; /* out: number of bytes transfered */ 70 { 71 struct disk_softc *sc = (struct disk_softc *)devdata; 72 int part = sc->sc_part; 73 struct partition *pp = &sc->sc_label.d_partitions[part]; 74 int s; 75 int64_t offset; 76 int count; 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 s = ARCBIOS->Seek(sc->sc_fd, &offset, 0); 99 s = ARCBIOS->Read(sc->sc_fd, addr, reqcnt, &count); 100 101 if (s < 0) 102 return (EIO); 103 104 *cnt = count; 105 return (0); 106 } 107 108 int 109 diskopen(struct open_file *f, ...) 110 { 111 int ctlr, unit, part; 112 113 struct disk_softc *sc; 114 struct disklabel *lp; 115 #ifdef arc 116 char *msg, buf[DEV_BSIZE]; 117 #endif 118 int i, cnt; 119 char *device; 120 va_list ap; 121 122 va_start(ap, f); 123 124 device = va_arg(ap, char *); 125 126 /* 127 * For NetBSD/sgimips, since we use the SGI partition map directly, 128 * we fake an in-core NetBSD disklabel with offset of 0. 129 * 130 * For NetBSD/arc, there is a MBR partition map on the disk, which we 131 * then expect to find a NetBSD disklabel within the MBR partition. 132 * We require that the kernel be located in first partition in the 133 * NetBSD disklabel, because we have not other way to represent the 134 * root partition. 135 */ 136 part = 0; 137 138 if (part >= 16) 139 return (ENXIO); 140 141 if (ARCBIOS->Open(device, 0, &i)) { 142 printf("open failed\n"); 143 return (ENXIO); 144 } 145 146 sc = alloc(sizeof(struct disk_softc)); 147 memset(sc, 0, sizeof(struct disk_softc)); 148 f->f_devdata = (void *)sc; 149 150 sc->sc_fd = i; 151 sc->sc_part = part; 152 153 /* try to read disk label and partition table information */ 154 lp = &sc->sc_label; 155 lp->d_secsize = DEV_BSIZE; 156 lp->d_secpercyl = 1; 157 lp->d_npartitions = MAXPARTITIONS; 158 lp->d_partitions[part].p_offset = 0; 159 lp->d_partitions[part].p_size = 0x7fffffff; 160 161 #ifdef arc 162 i = diskstrategy(sc, F_READ, (daddr_t)LABELSECTOR, DEV_BSIZE, 163 buf, &cnt); 164 if (i || cnt != DEV_BSIZE) { 165 printf("%s: error reading disk label\n", device); 166 free(sc, sizeof(struct disk_softc)); 167 return (ENXIO); 168 } 169 msg = getdisklabel(buf, lp); 170 if (msg) { 171 /* If no label, just assume 0 and return */ 172 return (0); 173 } 174 #endif 175 176 if (part >= lp->d_npartitions || lp->d_partitions[part].p_size == 0) { 177 free(sc, sizeof(struct disk_softc)); 178 return (ENXIO); 179 } 180 return (0); 181 } 182 183 #ifndef LIBSA_NO_DEV_CLOSE 184 int 185 diskclose(f) 186 struct open_file *f; 187 { 188 ARCBIOS->Close(((struct disk_softc *)(f->f_devdata))->sc_fd); 189 free(f->f_devdata, sizeof(struct disk_softc)); 190 f->f_devdata = (void *)0; 191 return (0); 192 } 193 #endif 194