wd.c revision 1.1.8.2
1 /* $NetBSD: wd.c,v 1.1.8.2 2011/06/06 09:06:15 jruoho Exp $ */ 2 3 /*- 4 * Copyright (c) 2003 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Manuel Bouyer. 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/param.h> 33 #include <sys/types.h> 34 #include <sys/stdint.h> 35 36 #include <lib/libsa/stand.h> 37 #include <lib/libkern/libkern.h> 38 39 #include <machine/param.h> 40 #include <machine/stdarg.h> 41 42 #include "boot.h" 43 #include "wdvar.h" 44 45 static int wd_get_params(struct wd_softc *wd); 46 static int wdgetdisklabel(struct wd_softc *wd); 47 static void wdgetdefaultlabel(struct wd_softc *wd, struct disklabel *lp); 48 49 /* 50 * Get drive parameters through 'device identify' command. 51 */ 52 int 53 wd_get_params(struct wd_softc *wd) 54 { 55 int error; 56 uint8_t buf[DEV_BSIZE]; 57 58 if ((error = wdc_exec_identify(wd, buf)) != 0) 59 return error; 60 61 wd->sc_params = *(struct ataparams *)buf; 62 63 /* 48-bit LBA addressing */ 64 if ((wd->sc_params.atap_cmd2_en & ATA_CMD2_LBA48) != 0) 65 wd->sc_flags |= WDF_LBA48; 66 67 /* Prior to ATA-4, LBA was optional. */ 68 if ((wd->sc_params.atap_capabilities1 & WDC_CAP_LBA) != 0) 69 wd->sc_flags |= WDF_LBA; 70 71 if ((wd->sc_flags & WDF_LBA48) != 0) { 72 DPRINTF(("Drive supports LBA48.\n")); 73 wd->sc_capacity = 74 ((uint64_t)wd->sc_params.atap_max_lba[3] << 48) | 75 ((uint64_t)wd->sc_params.atap_max_lba[2] << 32) | 76 ((uint64_t)wd->sc_params.atap_max_lba[1] << 16) | 77 ((uint64_t)wd->sc_params.atap_max_lba[0] << 0); 78 DPRINTF(("atap_max_lba = (0x%x, 0x%x, 0x%x, 0x%x)\n", 79 wd->sc_params.atap_max_lba[3], 80 wd->sc_params.atap_max_lba[2], 81 wd->sc_params.atap_max_lba[1], 82 wd->sc_params.atap_max_lba[0])); 83 wd->sc_capacity28 = 84 ((uint32_t)wd->sc_params.atap_capacity[1] << 16) | 85 ((uint32_t)wd->sc_params.atap_capacity[0] << 0); 86 DPRINTF(("atap_capacity = (0x%x, 0x%x)\n", 87 wd->sc_params.atap_capacity[1], 88 wd->sc_params.atap_capacity[0])); 89 } else if ((wd->sc_flags & WDF_LBA) != 0) { 90 DPRINTF(("Drive supports LBA.\n")); 91 wd->sc_capacity = wd->sc_capacity28 = 92 ((uint32_t)wd->sc_params.atap_capacity[1] << 16) | 93 ((uint32_t)wd->sc_params.atap_capacity[0] << 0); 94 } else { 95 DPRINTF(("Drive doesn't support LBA; using CHS.\n")); 96 wd->sc_capacity = wd->sc_capacity28 = 97 wd->sc_params.atap_cylinders * 98 wd->sc_params.atap_heads * 99 wd->sc_params.atap_sectors; 100 } 101 DPRINTF(("wd->sc_capacity = %" PRId64 ", wd->sc_capacity28 = %d.\n", 102 wd->sc_capacity, wd->sc_capacity28)); 103 104 return 0; 105 } 106 107 /* 108 * Initialize disk label to the default value. 109 */ 110 void 111 wdgetdefaultlabel(struct wd_softc *wd, struct disklabel *lp) 112 { 113 114 memset(lp, 0, sizeof(struct disklabel)); 115 116 lp->d_secsize = DEV_BSIZE; 117 lp->d_ntracks = wd->sc_params.atap_heads; 118 lp->d_nsectors = wd->sc_params.atap_sectors; 119 lp->d_ncylinders = wd->sc_params.atap_cylinders; 120 lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors; 121 122 if (strcmp(wd->sc_params.atap_model, "ST506") == 0) 123 lp->d_type = DTYPE_ST506; 124 else 125 lp->d_type = DTYPE_ESDI; 126 127 strncpy(lp->d_typename, wd->sc_params.atap_model, 16); 128 strncpy(lp->d_packname, "fictitious", 16); 129 if (wd->sc_capacity > UINT32_MAX) 130 lp->d_secperunit = UINT32_MAX; 131 else 132 lp->d_secperunit = wd->sc_capacity; 133 lp->d_rpm = 3600; 134 lp->d_interleave = 1; 135 lp->d_flags = 0; 136 137 lp->d_partitions[RAW_PART].p_offset = 0; 138 lp->d_partitions[RAW_PART].p_size = 139 lp->d_secperunit * (lp->d_secsize / DEV_BSIZE); 140 lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED; 141 lp->d_npartitions = MAXPARTITIONS; /* RAW_PART + 1 ??? */ 142 143 lp->d_magic = DISKMAGIC; 144 lp->d_magic2 = DISKMAGIC; 145 lp->d_checksum = dkcksum(lp); 146 147 /* 148 * Set partition 'a' to be the whole disk. 149 * Cleared if we find an mbr or a netbsd label. 150 */ 151 lp->d_partitions[0].p_size = lp->d_partitions[RAW_PART].p_size; 152 lp->d_partitions[0].p_fstype = FS_BSDFFS; 153 } 154 155 /* 156 * Read disk label from the device. 157 */ 158 int 159 wdgetdisklabel(struct wd_softc *wd) 160 { 161 char *msg; 162 size_t rsize; 163 struct disklabel *lp; 164 uint8_t buf[DEV_BSIZE]; 165 166 wdgetdefaultlabel(wd, &wd->sc_label); 167 168 if (wdstrategy(wd, F_READ, LABELSECTOR, DEV_BSIZE, buf, &rsize)) 169 return EOFFSET; 170 171 if ((msg = getdisklabel(buf + LABELOFFSET, &wd->sc_label))) 172 printf("wd%d: getdisklabel: %s\n", wd->sc_unit, msg); 173 174 lp = &wd->sc_label; 175 176 /* check partition */ 177 if ((wd->sc_part >= lp->d_npartitions) || 178 (lp->d_partitions[wd->sc_part].p_fstype == FS_UNUSED)) { 179 DPRINTF(("illegal partition\n")); 180 return EPART; 181 } 182 183 DPRINTF(("label info: d_secsize %d, d_nsectors %d, d_ncylinders %d," 184 " d_ntracks %d, d_secpercyl %d\n", 185 wd->sc_label.d_secsize, 186 wd->sc_label.d_nsectors, 187 wd->sc_label.d_ncylinders, 188 wd->sc_label.d_ntracks, 189 wd->sc_label.d_secpercyl)); 190 191 return 0; 192 } 193 194 /* 195 * Open device (read drive parameters and disklabel) 196 */ 197 int 198 wdopen(struct open_file *f, ...) 199 { 200 int error; 201 va_list ap; 202 u_int unit, part; 203 struct wd_softc *wd; 204 205 va_start(ap, f); 206 unit = va_arg(ap, u_int); 207 part = va_arg(ap, u_int); 208 va_end(ap); 209 210 DPRINTF(("wdopen: %d:%d\n", unit, part)); 211 212 wd = alloc(sizeof(struct wd_softc)); 213 if (wd == NULL) 214 return ENOMEM; 215 216 memset(wd, 0, sizeof(struct wd_softc)); 217 218 if (wdc_init(wd, &unit) != 0) 219 return (ENXIO); 220 221 wd->sc_part = part; 222 wd->sc_unit = unit; 223 224 if ((error = wd_get_params(wd)) != 0) 225 return error; 226 227 if ((error = wdgetdisklabel(wd)) != 0) 228 return error; 229 230 f->f_devdata = wd; 231 return 0; 232 } 233 234 /* 235 * Close device. 236 */ 237 int 238 wdclose(struct open_file *f) 239 { 240 241 return 0; 242 } 243 244 /* 245 * Read some data. 246 */ 247 int 248 wdstrategy(void *f, int rw, daddr_t dblk, size_t size, void *p, size_t *rsize) 249 { 250 int i, nsect; 251 daddr_t blkno; 252 struct wd_softc *wd; 253 struct partition *pp; 254 uint8_t *buf; 255 256 if (size == 0) 257 return 0; 258 259 if (rw != F_READ) 260 return EOPNOTSUPP; 261 262 buf = p; 263 wd = f; 264 pp = &wd->sc_label.d_partitions[wd->sc_part]; 265 266 nsect = howmany(size, wd->sc_label.d_secsize); 267 blkno = dblk + pp->p_offset; 268 269 for (i = 0; i < nsect; i++, blkno++) { 270 int error; 271 272 if ((error = wdc_exec_read(wd, WDCC_READ, blkno, buf)) != 0) 273 return error; 274 275 buf += wd->sc_label.d_secsize; 276 } 277 278 *rsize = size; 279 return 0; 280 } 281
Indexes created Mon Oct 27 02:09:54 GMT 2025