wd.c revision 1.16
1 /* $NetBSD: wd.c,v 1.16 2014/04/03 18:49:41 joerg 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 <dev/raidframe/raidframevar.h> /* For RF_PROTECTED_SECTORS */ 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 struct ataparams *params = (struct ataparams *)buf; 58 59 if ((error = wdc_exec_identify(wd, buf)) != 0) 60 return error; 61 62 wd->sc_params = *params; 63 64 /* 48-bit LBA addressing */ 65 if ((wd->sc_params.atap_cmd2_en & ATA_CMD2_LBA48) != 0) 66 wd->sc_flags |= WDF_LBA48; 67 68 /* Prior to ATA-4, LBA was optional. */ 69 if ((wd->sc_params.atap_capabilities1 & WDC_CAP_LBA) != 0) 70 wd->sc_flags |= WDF_LBA; 71 72 if ((wd->sc_flags & WDF_LBA48) != 0) { 73 DPRINTF(("Drive supports LBA48.\n")); 74 wd->sc_capacity = 75 ((uint64_t)wd->sc_params.atap_max_lba[3] << 48) | 76 ((uint64_t)wd->sc_params.atap_max_lba[2] << 32) | 77 ((uint64_t)wd->sc_params.atap_max_lba[1] << 16) | 78 ((uint64_t)wd->sc_params.atap_max_lba[0] << 0); 79 DPRINTF(("atap_max_lba = (0x%x, 0x%x, 0x%x, 0x%x)\n", 80 wd->sc_params.atap_max_lba[3], 81 wd->sc_params.atap_max_lba[2], 82 wd->sc_params.atap_max_lba[1], 83 wd->sc_params.atap_max_lba[0])); 84 wd->sc_capacity28 = 85 ((uint32_t)wd->sc_params.atap_capacity[1] << 16) | 86 ((uint32_t)wd->sc_params.atap_capacity[0] << 0); 87 DPRINTF(("atap_capacity = (0x%x, 0x%x)\n", 88 wd->sc_params.atap_capacity[1], 89 wd->sc_params.atap_capacity[0])); 90 } else if ((wd->sc_flags & WDF_LBA) != 0) { 91 DPRINTF(("Drive supports LBA.\n")); 92 wd->sc_capacity = wd->sc_capacity28 = 93 ((uint32_t)wd->sc_params.atap_capacity[1] << 16) | 94 ((uint32_t)wd->sc_params.atap_capacity[0] << 0); 95 } else { 96 DPRINTF(("Drive doesn't support LBA; using CHS.\n")); 97 wd->sc_capacity = wd->sc_capacity28 = 98 wd->sc_params.atap_cylinders * 99 wd->sc_params.atap_heads * 100 wd->sc_params.atap_sectors; 101 } 102 DPRINTF(("wd->sc_capacity = %" PRId64 ", wd->sc_capacity28 = %d.\n", 103 wd->sc_capacity, wd->sc_capacity28)); 104 105 return 0; 106 } 107 108 /* 109 * Initialize disk label to the default value. 110 */ 111 void 112 wdgetdefaultlabel(struct wd_softc *wd, struct disklabel *lp) 113 { 114 115 memset(lp, 0, sizeof(struct disklabel)); 116 117 lp->d_secsize = DEV_BSIZE; 118 lp->d_ntracks = wd->sc_params.atap_heads; 119 lp->d_nsectors = wd->sc_params.atap_sectors; 120 lp->d_ncylinders = wd->sc_params.atap_cylinders; 121 lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors; 122 123 if (strcmp(wd->sc_params.atap_model, "ST506") == 0) 124 lp->d_type = DTYPE_ST506; 125 else 126 lp->d_type = DTYPE_ESDI; 127 128 strncpy(lp->d_typename, wd->sc_params.atap_model, 16); 129 strncpy(lp->d_packname, "fictitious", 16); 130 if (wd->sc_capacity > UINT32_MAX) 131 lp->d_secperunit = UINT32_MAX; 132 else 133 lp->d_secperunit = wd->sc_capacity; 134 lp->d_rpm = 3600; 135 lp->d_interleave = 1; 136 lp->d_flags = 0; 137 138 lp->d_partitions[RAW_PART].p_offset = 0; 139 lp->d_partitions[RAW_PART].p_size = 140 lp->d_secperunit * (lp->d_secsize / DEV_BSIZE); 141 lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED; 142 lp->d_npartitions = MAXPARTITIONS; /* RAW_PART + 1 ??? */ 143 144 lp->d_magic = DISKMAGIC; 145 lp->d_magic2 = DISKMAGIC; 146 lp->d_checksum = dkcksum(lp); 147 } 148 149 /* 150 * Read disk label from the device. 151 */ 152 int 153 wdgetdisklabel(struct wd_softc *wd) 154 { 155 char *msg; 156 int sector; 157 size_t rsize; 158 struct disklabel *lp; 159 uint8_t buf[DEV_BSIZE]; 160 uint16_t magic; 161 162 wdgetdefaultlabel(wd, &wd->sc_label); 163 164 /* 165 * Find NetBSD Partition in DOS partition table. 166 */ 167 sector = 0; 168 if (wdstrategy(wd, F_READ, MBR_BBSECTOR, DEV_BSIZE, buf, &rsize)) 169 return EOFFSET; 170 171 memcpy(&magic, &buf[MBR_MAGIC_OFFSET], sizeof(magic)); 172 if (magic == MBR_MAGIC) { 173 int i; 174 struct mbr_partition *mp; 175 176 /* 177 * Lookup NetBSD slice. If there is none, go ahead 178 * and try to read the disklabel off sector #0. 179 */ 180 mp = (struct mbr_partition *)&buf[MBR_PART_OFFSET]; 181 for (i = 0; i < MBR_PART_COUNT; i++) { 182 if (mp[i].mbrp_type == MBR_PTYPE_NETBSD) { 183 sector = mp[i].mbrp_start; 184 break; 185 } 186 } 187 } 188 189 if (wdstrategy(wd, F_READ, sector + LABELSECTOR, DEV_BSIZE, 190 buf, &rsize)) 191 return EOFFSET; 192 193 if ((msg = getdisklabel(buf + LABELOFFSET, &wd->sc_label))) 194 printf("wd%d: getdisklabel: %s\n", wd->sc_unit, msg); 195 196 lp = &wd->sc_label; 197 198 /* check partition */ 199 if ((wd->sc_part >= lp->d_npartitions) || 200 (lp->d_partitions[wd->sc_part].p_fstype == FS_UNUSED)) { 201 DPRINTF(("illegal partition\n")); 202 return EPART; 203 } 204 205 DPRINTF(("label info: d_secsize %d, d_nsectors %d, d_ncylinders %d," 206 " d_ntracks %d, d_secpercyl %d\n", 207 wd->sc_label.d_secsize, 208 wd->sc_label.d_nsectors, 209 wd->sc_label.d_ncylinders, 210 wd->sc_label.d_ntracks, 211 wd->sc_label.d_secpercyl)); 212 213 return 0; 214 } 215 216 /* 217 * Open device (read drive parameters and disklabel) 218 */ 219 int 220 wdopen(struct open_file *f, ...) 221 { 222 int error; 223 va_list ap; 224 u_int unit, part; 225 struct wd_softc *wd; 226 227 va_start(ap, f); 228 unit = va_arg(ap, u_int); 229 part = va_arg(ap, u_int); 230 va_end(ap); 231 232 DPRINTF(("wdopen: %d:%d\n", unit, part)); 233 234 wd = alloc(sizeof(struct wd_softc)); 235 if (wd == NULL) 236 return ENOMEM; 237 238 memset(wd, 0, sizeof(struct wd_softc)); 239 240 if (wdc_init(wd, &unit) != 0) 241 return (ENXIO); 242 243 wd->sc_part = part; 244 wd->sc_unit = unit; 245 246 if ((error = wd_get_params(wd)) != 0) 247 return error; 248 249 if ((error = wdgetdisklabel(wd)) != 0) 250 return error; 251 252 f->f_devdata = wd; 253 return 0; 254 } 255 256 /* 257 * Close device. 258 */ 259 int 260 wdclose(struct open_file *f) 261 { 262 263 return 0; 264 } 265 266 /* 267 * Read some data. 268 */ 269 int 270 wdstrategy(void *f, int rw, daddr_t dblk, size_t size, void *p, size_t *rsize) 271 { 272 int i, nsect; 273 daddr_t blkno; 274 struct wd_softc *wd; 275 struct partition *pp; 276 uint8_t *buf; 277 278 if (size == 0) 279 return 0; 280 281 if (rw != F_READ) 282 return EOPNOTSUPP; 283 284 buf = p; 285 wd = f; 286 pp = &wd->sc_label.d_partitions[wd->sc_part]; 287 288 nsect = howmany(size, wd->sc_label.d_secsize); 289 blkno = dblk + pp->p_offset; 290 if (pp->p_fstype == FS_RAID) 291 blkno += RF_PROTECTED_SECTORS; 292 293 for (i = 0; i < nsect; i++, blkno++) { 294 int error; 295 296 if ((error = wdc_exec_read(wd, WDCC_READ, blkno, buf)) != 0) 297 return error; 298 299 buf += wd->sc_label.d_secsize; 300 } 301 302 *rsize = size; 303 return 0; 304 } 305
Indexes created Fri Sep 26 20:09:58 GMT 2025