wd.c revision 1.9
1 /* $NetBSD: wd.c,v 1.9 2008/03/02 06:17:41 tsutsui 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 * 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 NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/types.h> 40 #include <sys/stdint.h> 41 42 #include <lib/libsa/stand.h> 43 #include <lib/libkern/libkern.h> 44 45 #include <machine/param.h> 46 #include <machine/stdarg.h> 47 #include <dev/raidframe/raidframevar.h> /* For RF_PROTECTED_SECTORS */ 48 49 #include "boot.h" 50 #include "wdvar.h" 51 52 static int wd_get_params(struct wd_softc *wd); 53 static int wdgetdisklabel(struct wd_softc *wd); 54 static void wdgetdefaultlabel(struct wd_softc *wd, struct disklabel *lp); 55 56 /* 57 * Get drive parameters through 'device identify' command. 58 */ 59 int 60 wd_get_params(struct wd_softc *wd) 61 { 62 int error; 63 uint8_t buf[DEV_BSIZE]; 64 65 if ((error = wdc_exec_identify(wd, buf)) != 0) 66 return error; 67 68 wd->sc_params = *(struct ataparams *)buf; 69 70 /* 48-bit LBA addressing */ 71 if ((wd->sc_params.atap_cmd2_en & ATA_CMD2_LBA48) != 0) { 72 DPRINTF(("Drive supports LBA48.\n")); 73 #if defined(_ENABLE_LBA48) 74 wd->sc_flags |= WDF_LBA48; 75 #endif 76 } 77 78 /* Prior to ATA-4, LBA was optional. */ 79 if ((wd->sc_params.atap_capabilities1 & WDC_CAP_LBA) != 0) { 80 DPRINTF(("Drive supports LBA.\n")); 81 wd->sc_flags |= WDF_LBA; 82 } 83 84 return 0; 85 } 86 87 /* 88 * Initialize disk label to the default value. 89 */ 90 void 91 wdgetdefaultlabel(struct wd_softc *wd, struct disklabel *lp) 92 { 93 94 memset(lp, 0, sizeof(struct disklabel)); 95 96 lp->d_secsize = DEV_BSIZE; 97 lp->d_ntracks = wd->sc_params.atap_heads; 98 lp->d_nsectors = wd->sc_params.atap_sectors; 99 lp->d_ncylinders = wd->sc_params.atap_cylinders; 100 lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors; 101 102 if (strcmp(wd->sc_params.atap_model, "ST506") == 0) 103 lp->d_type = DTYPE_ST506; 104 else 105 lp->d_type = DTYPE_ESDI; 106 107 strncpy(lp->d_typename, wd->sc_params.atap_model, 16); 108 strncpy(lp->d_packname, "fictitious", 16); 109 if (wd->sc_capacity > UINT32_MAX) 110 lp->d_secperunit = UINT32_MAX; 111 else 112 lp->d_secperunit = wd->sc_capacity; 113 lp->d_rpm = 3600; 114 lp->d_interleave = 1; 115 lp->d_flags = 0; 116 117 lp->d_partitions[RAW_PART].p_offset = 0; 118 lp->d_partitions[RAW_PART].p_size = 119 lp->d_secperunit * (lp->d_secsize / DEV_BSIZE); 120 lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED; 121 lp->d_npartitions = MAXPARTITIONS; /* RAW_PART + 1 ??? */ 122 123 lp->d_magic = DISKMAGIC; 124 lp->d_magic2 = DISKMAGIC; 125 lp->d_checksum = dkcksum(lp); 126 } 127 128 /* 129 * Read disk label from the device. 130 */ 131 int 132 wdgetdisklabel(struct wd_softc *wd) 133 { 134 char *msg; 135 int sector; 136 size_t rsize; 137 struct disklabel *lp; 138 uint8_t buf[DEV_BSIZE]; 139 140 wdgetdefaultlabel(wd, &wd->sc_label); 141 142 /* 143 * Find NetBSD Partition in DOS partition table. 144 */ 145 sector = 0; 146 if (wdstrategy(wd, F_READ, MBR_BBSECTOR, DEV_BSIZE, buf, &rsize)) 147 return EOFFSET; 148 149 if (*(uint16_t *)&buf[MBR_MAGIC_OFFSET] == MBR_MAGIC) { 150 int i; 151 struct mbr_partition *mp; 152 153 /* 154 * Lookup NetBSD slice. If there is none, go ahead 155 * and try to read the disklabel off sector #0. 156 */ 157 mp = (struct mbr_partition *)&buf[MBR_PART_OFFSET]; 158 for (i = 0; i < MBR_PART_COUNT; i++) { 159 if (mp[i].mbrp_type == MBR_PTYPE_NETBSD) { 160 sector = mp[i].mbrp_start; 161 break; 162 } 163 } 164 } 165 166 if (wdstrategy(wd, F_READ, sector + LABELSECTOR, DEV_BSIZE, 167 buf, &rsize)) 168 return EOFFSET; 169 170 if ((msg = getdisklabel(buf + LABELOFFSET, &wd->sc_label))) 171 printf("wd%d: getdisklabel: %s\n", wd->sc_unit, msg); 172 173 lp = &wd->sc_label; 174 175 /* check partition */ 176 if ((wd->sc_part >= lp->d_npartitions) || 177 (lp->d_partitions[wd->sc_part].p_fstype == FS_UNUSED)) { 178 DPRINTF(("illegal partition\n")); 179 return EPART; 180 } 181 182 DPRINTF(("label info: d_secsize %d, d_nsectors %d, d_ncylinders %d," 183 "d_ntracks %d, d_secpercyl %d\n", 184 wd->sc_label.d_secsize, 185 wd->sc_label.d_nsectors, 186 wd->sc_label.d_ncylinders, 187 wd->sc_label.d_ntracks, 188 wd->sc_label.d_secpercyl)); 189 190 return 0; 191 } 192 193 /* 194 * Open device (read drive parameters and disklabel) 195 */ 196 int 197 wdopen(struct open_file *f, ...) 198 { 199 int error; 200 va_list ap; 201 u_int unit, part; 202 struct wd_softc *wd; 203 204 va_start(ap, f); 205 unit = va_arg(ap, u_int); 206 part = va_arg(ap, u_int); 207 va_end(ap); 208 209 DPRINTF(("wdopen: %d:%d\n", unit, part)); 210 211 wd = alloc(sizeof(struct wd_softc)); 212 if (wd == NULL) 213 return ENOMEM; 214 215 memset(wd, 0, sizeof(struct wd_softc)); 216 217 if (wdc_init(wd, &unit) != 0) 218 return (ENXIO); 219 220 wd->sc_part = part; 221 wd->sc_unit = unit; 222 223 if ((error = wd_get_params(wd)) != 0) 224 return error; 225 226 if ((error = wdgetdisklabel(wd)) != 0) 227 return error; 228 229 f->f_devdata = wd; 230 return 0; 231 } 232 233 /* 234 * Close device. 235 */ 236 int 237 wdclose(struct open_file *f) 238 { 239 240 return 0; 241 } 242 243 /* 244 * Read some data. 245 */ 246 int 247 wdstrategy(void *f, int rw, daddr_t dblk, size_t size, void *p, size_t *rsize) 248 { 249 int i, nsect; 250 daddr_t blkno; 251 struct wd_softc *wd; 252 struct partition *pp; 253 uint8_t *buf; 254 255 if (size == 0) 256 return 0; 257 258 if (rw != F_READ) 259 return EOPNOTSUPP; 260 261 buf = p; 262 wd = f; 263 pp = &wd->sc_label.d_partitions[wd->sc_part]; 264 265 nsect = howmany(size, wd->sc_label.d_secsize); 266 blkno = dblk + pp->p_offset; 267 if (pp->p_fstype == FS_RAID) 268 blkno += RF_PROTECTED_SECTORS; 269 270 for (i = 0; i < nsect; i++, blkno++) { 271 int error; 272 273 if ((error = wdc_exec_read(wd, WDCC_READ, blkno, buf)) != 0) 274 return error; 275 276 buf += wd->sc_label.d_secsize; 277 } 278 279 *rsize = size; 280 return 0; 281 } 282
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