1 /* $NetBSD: wd.c,v 1.18 2019/01/08 19:41:09 jdolecek 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 <dev/raidframe/raidframevar.h> /* For RF_PROTECTED_SECTORS */ 40 41 #include "boot.h" 42 #include "wdvar.h" 43 44 static int wd_get_params(struct wd_softc *wd); 45 static int wdgetdisklabel(struct wd_softc *wd); 46 static void wdgetdefaultlabel(struct wd_softc *wd, struct disklabel *lp); 47 48 /* 49 * Get drive parameters through 'device identify' command. 50 */ 51 int 52 wd_get_params(struct wd_softc *wd) 53 { 54 int error; 55 uint8_t buf[DEV_BSIZE]; 56 struct ataparams *params = (struct ataparams *)buf; 57 58 if ((error = wdc_exec_identify(wd, buf)) != 0) 59 return error; 60 61 wd->sc_params = *params; 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 = DKTYPE_ST506; 124 else 125 lp->d_type = DKTYPE_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 /* 149 * Read disk label from the device. 150 */ 151 int 152 wdgetdisklabel(struct wd_softc *wd) 153 { 154 char *msg; 155 int sector; 156 size_t rsize; 157 struct disklabel *lp; 158 uint8_t buf[DEV_BSIZE]; 159 uint16_t magic; 160 161 wdgetdefaultlabel(wd, &wd->sc_label); 162 163 /* 164 * Find NetBSD Partition in DOS partition table. 165 */ 166 sector = 0; 167 if (wdstrategy(wd, F_READ, MBR_BBSECTOR, DEV_BSIZE, buf, &rsize)) 168 return EOFFSET; 169 170 memcpy(&magic, &buf[MBR_MAGIC_OFFSET], sizeof(magic)); 171 if (magic == MBR_MAGIC) { 172 int i; 173 struct mbr_partition *mp; 174 175 /* 176 * Lookup NetBSD slice. If there is none, go ahead 177 * and try to read the disklabel off sector #0. 178 */ 179 mp = (struct mbr_partition *)&buf[MBR_PART_OFFSET]; 180 for (i = 0; i < MBR_PART_COUNT; i++) { 181 if (mp[i].mbrp_type == MBR_PTYPE_NETBSD) { 182 sector = mp[i].mbrp_start; 183 break; 184 } 185 } 186 } 187 188 if (wdstrategy(wd, F_READ, sector + LABELSECTOR, DEV_BSIZE, 189 buf, &rsize)) 190 return EOFFSET; 191 192 if ((msg = getdisklabel(buf + LABELOFFSET, &wd->sc_label))) 193 printf("wd%d: getdisklabel: %s\n", wd->sc_unit, msg); 194 195 lp = &wd->sc_label; 196 197 /* check partition */ 198 if ((wd->sc_part >= lp->d_npartitions) || 199 (lp->d_partitions[wd->sc_part].p_fstype == FS_UNUSED)) { 200 DPRINTF(("illegal partition\n")); 201 return EPART; 202 } 203 204 DPRINTF(("label info: d_secsize %d, d_nsectors %d, d_ncylinders %d," 205 " d_ntracks %d, d_secpercyl %d\n", 206 wd->sc_label.d_secsize, 207 wd->sc_label.d_nsectors, 208 wd->sc_label.d_ncylinders, 209 wd->sc_label.d_ntracks, 210 wd->sc_label.d_secpercyl)); 211 212 return 0; 213 } 214 215 /* 216 * Open device (read drive parameters and disklabel) 217 */ 218 int 219 wdopen(struct open_file *f, ...) 220 { 221 int error; 222 va_list ap; 223 u_int unit, part; 224 struct wd_softc *wd; 225 226 va_start(ap, f); 227 unit = va_arg(ap, u_int); 228 part = va_arg(ap, u_int); 229 va_end(ap); 230 231 DPRINTF(("wdopen: %d:%d\n", unit, part)); 232 233 wd = alloc(sizeof(struct wd_softc)); 234 if (wd == NULL) 235 return ENOMEM; 236 237 memset(wd, 0, sizeof(struct wd_softc)); 238 239 if (wdc_init(wd, &unit) != 0) 240 return (ENXIO); 241 242 wd->sc_part = part; 243 wd->sc_unit = unit; 244 245 if ((error = wd_get_params(wd)) != 0) 246 return error; 247 248 if ((error = wdgetdisklabel(wd)) != 0) 249 return error; 250 251 f->f_devdata = wd; 252 return 0; 253 } 254 255 /* 256 * Close device. 257 */ 258 int 259 wdclose(struct open_file *f) 260 { 261 262 return 0; 263 } 264 265 /* 266 * Read some data. 267 */ 268 int 269 wdstrategy(void *f, int rw, daddr_t dblk, size_t size, void *p, size_t *rsize) 270 { 271 int i, nsect; 272 daddr_t blkno; 273 struct wd_softc *wd; 274 struct partition *pp; 275 uint8_t *buf; 276 277 if (size == 0) 278 return 0; 279 280 if (rw != F_READ) 281 return EOPNOTSUPP; 282 283 buf = p; 284 wd = f; 285 pp = &wd->sc_label.d_partitions[wd->sc_part]; 286 287 nsect = howmany(size, wd->sc_label.d_secsize); 288 blkno = dblk + pp->p_offset; 289 if (pp->p_fstype == FS_RAID) 290 blkno += RF_PROTECTED_SECTORS; 291 292 for (i = 0; i < nsect; i++, blkno++) { 293 int error; 294 295 if ((error = wdc_exec_read(wd, WDCC_READ, blkno, buf)) != 0) 296 return error; 297 298 buf += wd->sc_label.d_secsize; 299 } 300 301 *rsize = size; 302 return 0; 303 } 304