dsk.c revision 1.10
1 /* $NetBSD: dsk.c,v 1.10 2011/11/01 16:32:57 phx Exp $ */ 2 3 /*- 4 * Copyright (c) 2010 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Tohru Nishimura. 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 /* 33 * assumptions; 34 * - up to 4 IDE/SATA drives. 35 * - a single (master) drive in each IDE channel. 36 * - all drives are up and spinning. 37 */ 38 39 #include <sys/types.h> 40 41 #include <lib/libsa/stand.h> 42 #include <lib/libsa/ufs.h> 43 44 #include <sys/disklabel.h> 45 #include <sys/bootblock.h> 46 #include <sys/param.h> 47 48 #include <dev/raidframe/raidframevar.h> 49 50 #include <machine/bootinfo.h> 51 52 #include "globals.h" 53 54 /* 55 * - no vtophys() translation, vaddr_t == paddr_t. 56 */ 57 #define CSR_READ_4(r) in32rb(r) 58 #define CSR_WRITE_4(r,v) out32rb(r,v) 59 #define CSR_READ_1(r) in8(r) 60 #define CSR_WRITE_1(r,v) out8(r,v) 61 62 struct dskdv { 63 char *name; 64 int (*match)(unsigned, void *); 65 void *(*init)(unsigned, void *); 66 }; 67 68 static struct dskdv ldskdv[] = { 69 { "pciide", pciide_match, pciide_init }, 70 { "siisata", siisata_match, siisata_init }, 71 }; 72 static int ndskdv = sizeof(ldskdv)/sizeof(ldskdv[0]); 73 74 static void disk_scan(void *); 75 static int probe_drive(struct dkdev_ata *, int); 76 static void drive_ident(struct disk *, char *); 77 static char *mkident(char *, int); 78 static void set_xfermode(struct dkdev_ata *, int); 79 static void decode_dlabel(struct disk *, char *); 80 static int lba_read(struct disk *, int64_t, int, void *); 81 static void issue48(struct dvata_chan *, int64_t, int); 82 static void issue28(struct dvata_chan *, int64_t, int); 83 static struct disk *lookup_disk(int); 84 85 #define MAX_UNITS 8 86 static struct disk ldisk[MAX_UNITS]; 87 88 int 89 dskdv_init(void *self) 90 { 91 struct pcidev *pci = self; 92 struct dskdv *dv; 93 unsigned tag; 94 int n; 95 96 tag = pci->bdf; 97 for (n = 0; n < ndskdv; n++) { 98 dv = &ldskdv[n]; 99 if ((*dv->match)(tag, NULL) > 0) 100 goto found; 101 } 102 return 0; 103 found: 104 pci->drv = (*dv->init)(tag, NULL); 105 if (pci->drv == NULL) 106 return 0; 107 disk_scan(pci->drv); 108 return 1; 109 } 110 111 static void 112 disk_scan(void *drv) 113 { 114 struct dkdev_ata *l = drv; 115 struct disk *d; 116 static int ndrive = 0; 117 int n; 118 119 for (n = 0; n < 4 && ndrive < MAX_UNITS; n++) { 120 if (l->presense[n] == 0) 121 continue; 122 if (probe_drive(l, n) == 0) { 123 l->presense[n] = 0; 124 continue; 125 } 126 d = &ldisk[ndrive]; 127 d->dvops = l; 128 d->unittag = ndrive; 129 snprintf(d->xname, sizeof(d->xname), "wd%d", d->unittag); 130 set_xfermode(l, n); 131 drive_ident(d, l->iobuf); 132 decode_dlabel(d, l->iobuf); 133 ndrive += 1; 134 } 135 } 136 137 int 138 spinwait_unbusy(struct dkdev_ata *l, int n, int milli, const char **err) 139 { 140 struct dvata_chan *chan = &l->chan[n]; 141 int sts; 142 const char *msg; 143 144 /* 145 * For best compatibility it is recommended to wait 400ns and 146 * read the alternate status byte four times before the status 147 * is valid. 148 */ 149 delay(1); 150 (void)CSR_READ_1(chan->alt); 151 (void)CSR_READ_1(chan->alt); 152 (void)CSR_READ_1(chan->alt); 153 (void)CSR_READ_1(chan->alt); 154 155 sts = CSR_READ_1(chan->cmd + _STS); 156 while (milli-- > 0 157 && sts != 0xff 158 && (sts & (ATA_STS_BUSY|ATA_STS_DRDY)) != ATA_STS_DRDY) { 159 delay(1000); 160 sts = CSR_READ_1(chan->cmd + _STS); 161 } 162 163 msg = NULL; 164 if (sts == 0xff) 165 msg = "returned 0xff"; 166 else if (sts & ATA_STS_ERR) 167 msg = "returned ERR"; 168 else if (sts & ATA_STS_BUSY) 169 msg = "remains BUSY"; 170 else if ((sts & ATA_STS_DRDY) == 0) 171 msg = "no DRDY"; 172 173 if (err != NULL) 174 *err = msg; 175 return msg == NULL; 176 } 177 178 int 179 perform_atareset(struct dkdev_ata *l, int n) 180 { 181 struct dvata_chan *chan = &l->chan[n]; 182 183 CSR_WRITE_1(chan->ctl, ATA_DREQ); 184 delay(10); 185 CSR_WRITE_1(chan->ctl, ATA_SRST|ATA_DREQ); 186 delay(10); 187 CSR_WRITE_1(chan->ctl, ATA_DREQ); 188 189 return spinwait_unbusy(l, n, 150, NULL); 190 } 191 192 int 193 satapresense(struct dkdev_ata *l, int n) 194 { 195 #define VND_CH(n) (((n&02)<<8)+((n&01)<<7)) 196 #define VND_SC(n) (0x100+VND_CH(n)) 197 #define VND_SS(n) (0x104+VND_CH(n)) 198 199 uint32_t sc = l->bar[5] + VND_SC(n); 200 uint32_t ss = l->bar[5] + VND_SS(n); 201 unsigned val; 202 203 val = (00 << 4) | (03 << 8); /* any speed, no pwrmgt */ 204 CSR_WRITE_4(sc, val | 01); /* perform init */ 205 delay(50 * 1000); 206 CSR_WRITE_4(sc, val); 207 delay(50 * 1000); 208 val = CSR_READ_4(ss); /* has completed */ 209 return ((val & 03) == 03); /* active drive found */ 210 } 211 212 static int 213 probe_drive(struct dkdev_ata *l, int n) 214 { 215 struct dvata_chan *chan = &l->chan[n]; 216 uint16_t *p; 217 int i; 218 219 CSR_WRITE_1(chan->cmd + _CMD, ATA_CMD_IDENT); 220 (void)CSR_READ_1(chan->alt); 221 delay(10 * 1000); 222 if (spinwait_unbusy(l, n, 1000, NULL) == 0) 223 return 0; 224 225 p = (uint16_t *)l->iobuf; 226 for (i = 0; i < 512; i += 2) { 227 /* need to have bswap16 */ 228 *p++ = iole16toh(chan->cmd + _DAT); 229 } 230 (void)CSR_READ_1(chan->cmd + _STS); 231 return 1; 232 } 233 234 static void 235 drive_ident(struct disk *d, char *ident) 236 { 237 uint16_t *p; 238 uint64_t huge; 239 240 p = (uint16_t *)ident; 241 DPRINTF(("[49]%04x [82]%04x [83]%04x [84]%04x " 242 "[85]%04x [86]%04x [87]%04x [88]%04x\n", 243 p[49], p[82], p[83], p[84], 244 p[85], p[86], p[87], p[88])); 245 huge = 0; 246 printf("%s: ", d->xname); 247 printf("<%s> ", mkident((char *)ident + 54, 40)); 248 if (p[49] & (1 << 8)) 249 printf("DMA "); 250 if (p[49] & (1 << 9)) { 251 printf("LBA "); 252 huge = p[60] | (p[61] << 16); 253 } 254 if ((p[83] & 0xc000) == 0x4000 && (p[83] & (1 << 10))) { 255 printf("LBA48 "); 256 huge = p[100] | (p[101] << 16); 257 huge |= (uint64_t)p[102] << 32; 258 huge |= (uint64_t)p[103] << 48; 259 } 260 huge >>= (1 + 10); 261 printf("%d MB\n", (int)huge); 262 263 memcpy(d->ident, ident, sizeof(d->ident)); 264 d->nsect = huge; 265 d->lba_read = lba_read; 266 } 267 268 static char * 269 mkident(char *src, int len) 270 { 271 static char local[40]; 272 char *dst, *end, *last; 273 274 if (len > sizeof(local)) 275 len = sizeof(local); 276 dst = last = local; 277 end = src + len - 1; 278 279 /* reserve space for '\0' */ 280 if (len < 2) 281 goto out; 282 /* skip leading white space */ 283 while (*src != '\0' && src < end && *src == ' ') 284 ++src; 285 /* copy string, omitting trailing white space */ 286 while (*src != '\0' && src < end) { 287 *dst++ = *src; 288 if (*src++ != ' ') 289 last = dst; 290 } 291 out: 292 *last = '\0'; 293 return local; 294 } 295 296 static void 297 decode_dlabel(struct disk *d, char *iobuf) 298 { 299 struct mbr_partition *mp, *bsdp; 300 struct disklabel *dlp; 301 struct partition *pp; 302 char *dp; 303 int i, first, rf_offset; 304 305 bsdp = NULL; 306 (*d->lba_read)(d, 0, 1, iobuf); 307 if (bswap16(*(uint16_t *)(iobuf + MBR_MAGIC_OFFSET)) != MBR_MAGIC) 308 goto skip; 309 mp = (struct mbr_partition *)(iobuf + MBR_PART_OFFSET); 310 for (i = 0; i < MBR_PART_COUNT; i++, mp++) { 311 if (mp->mbrp_type == MBR_PTYPE_NETBSD) { 312 bsdp = mp; 313 break; 314 } 315 } 316 skip: 317 rf_offset = 0; 318 first = (bsdp) ? bswap32(bsdp->mbrp_start) : 0; 319 (*d->lba_read)(d, first + LABELSECTOR, 1, iobuf); 320 dp = iobuf /* + LABELOFFSET */; 321 for (i = 0; i < 512 - sizeof(struct disklabel); i++, dp += 4) { 322 dlp = (struct disklabel *)dp; 323 if (dlp->d_magic == DISKMAGIC && dlp->d_magic2 == DISKMAGIC) { 324 if (dlp->d_partitions[0].p_fstype == FS_RAID) { 325 printf("%s%c: raid\n", d->xname, i + 'a'); 326 snprintf(d->xname, sizeof(d->xname), "raid."); 327 rf_offset = dlp->d_partitions[0].p_offset + 328 RF_PROTECTED_SECTORS; 329 (*d->lba_read)(d, rf_offset + LABELSECTOR, 1, 330 iobuf); 331 dp = iobuf /* + LABELOFFSET */; 332 for (i = 0; i < 512 - sizeof(struct disklabel); i++, dp += 4) { 333 dlp = (struct disklabel *)dp; 334 if (dlp->d_magic == DISKMAGIC && 335 dlp->d_magic2 == DISKMAGIC) 336 goto found; 337 } 338 } else /* Not RAID */ 339 goto found; 340 } 341 } 342 d->dlabel = NULL; 343 printf("%s: no disklabel\n", d->xname); 344 return; 345 found: 346 for (i = 0; i < dlp->d_npartitions; i += 1) { 347 const char *type; 348 pp = &dlp->d_partitions[i]; 349 pp->p_offset += rf_offset; 350 type = NULL; 351 switch (pp->p_fstype) { 352 case FS_SWAP: /* swap */ 353 type = "swap"; 354 break; 355 case FS_BSDFFS: 356 type = "ffs"; 357 break; 358 case FS_EX2FS: 359 type = "ext2fs"; 360 break; 361 } 362 if (type != NULL) 363 printf("%s%c: %s\t(%u)\n", d->xname, i + 'a', type, 364 pp->p_offset); 365 } 366 d->dlabel = allocaligned(sizeof(struct disklabel), 4); 367 memcpy(d->dlabel, dlp, sizeof(struct disklabel)); 368 } 369 370 static void 371 set_xfermode(struct dkdev_ata *l, int n) 372 { 373 struct dvata_chan *chan = &l->chan[n]; 374 375 CSR_WRITE_1(chan->cmd + _FEA, ATA_XFER); 376 CSR_WRITE_1(chan->cmd + _NSECT, XFER_PIO0); 377 CSR_WRITE_1(chan->cmd + _DEV, ATA_DEV_OBS); /* ??? */ 378 CSR_WRITE_1(chan->cmd + _CMD, ATA_CMD_SETF); 379 380 spinwait_unbusy(l, n, 1000, NULL); 381 } 382 383 static int 384 lba_read(struct disk *d, int64_t bno, int bcnt, void *buf) 385 { 386 struct dkdev_ata *l; 387 struct dvata_chan *chan; 388 void (*issue)(struct dvata_chan *, int64_t, int); 389 int n, rdcnt, i, k; 390 uint16_t *p; 391 const char *err; 392 int error; 393 394 l = d->dvops; 395 n = d->unittag; 396 p = (uint16_t *)buf; 397 chan = &l->chan[n]; 398 error = 0; 399 for ( ; bcnt > 0; bno += rdcnt, bcnt -= rdcnt) { 400 issue = (bno < (1ULL<<28)) ? issue28 : issue48; 401 rdcnt = (bcnt > 255) ? 255 : bcnt; 402 (*issue)(chan, bno, rdcnt); 403 for (k = 0; k < rdcnt; k++) { 404 if (spinwait_unbusy(l, n, 1000, &err) == 0) { 405 printf("%s blk %lld %s\n", d->xname, bno, err); 406 error = EIO; 407 break; 408 } 409 for (i = 0; i < 512; i += 2) { 410 /* arrives in native order */ 411 *p++ = *(uint16_t *)(chan->cmd + _DAT); 412 } 413 /* clear irq if any */ 414 (void)CSR_READ_1(chan->cmd + _STS); 415 } 416 } 417 return error; 418 } 419 420 static void 421 issue48(struct dvata_chan *chan, int64_t bno, int nblk) 422 { 423 424 CSR_WRITE_1(chan->cmd + _NSECT, 0); /* always less than 256 */ 425 CSR_WRITE_1(chan->cmd + _LBAL, (bno >> 24) & 0xff); 426 CSR_WRITE_1(chan->cmd + _LBAM, (bno >> 32) & 0xff); 427 CSR_WRITE_1(chan->cmd + _LBAH, (bno >> 40) & 0xff); 428 CSR_WRITE_1(chan->cmd + _NSECT, nblk); 429 CSR_WRITE_1(chan->cmd + _LBAL, (bno >> 0) & 0xff); 430 CSR_WRITE_1(chan->cmd + _LBAM, (bno >> 8) & 0xff); 431 CSR_WRITE_1(chan->cmd + _LBAH, (bno >> 16) & 0xff); 432 CSR_WRITE_1(chan->cmd + _DEV, ATA_DEV_LBA); 433 CSR_WRITE_1(chan->cmd + _CMD, ATA_CMD_READ_EXT); 434 } 435 436 static void 437 issue28(struct dvata_chan *chan, int64_t bno, int nblk) 438 { 439 440 CSR_WRITE_1(chan->cmd + _NSECT, nblk); 441 CSR_WRITE_1(chan->cmd + _LBAL, (bno >> 0) & 0xff); 442 CSR_WRITE_1(chan->cmd + _LBAM, (bno >> 8) & 0xff); 443 CSR_WRITE_1(chan->cmd + _LBAH, (bno >> 16) & 0xff); 444 CSR_WRITE_1(chan->cmd + _DEV, ((bno >> 24) & 0xf) | ATA_DEV_LBA); 445 CSR_WRITE_1(chan->cmd + _CMD, ATA_CMD_READ); 446 } 447 448 static struct disk * 449 lookup_disk(int unit) 450 { 451 452 return &ldisk[unit]; 453 } 454 455 int 456 dsk_open(struct open_file *f, ...) 457 { 458 va_list ap; 459 int unit, part; 460 const char *name; 461 struct disk *d; 462 struct disklabel *dlp; 463 struct fs_ops *fs; 464 int error; 465 extern struct btinfo_bootpath bi_path; 466 extern struct btinfo_rootdevice bi_rdev; 467 extern struct fs_ops fs_ffsv2, fs_ffsv1; 468 469 va_start(ap, f); 470 unit = va_arg(ap, int); 471 part = va_arg(ap, int); 472 name = va_arg(ap, const char *); 473 va_end(ap); 474 475 if ((d = lookup_disk(unit)) == NULL) 476 return ENXIO; 477 f->f_devdata = d; 478 if ((dlp = d->dlabel) == NULL || part >= dlp->d_npartitions) 479 return ENXIO; 480 d->part = part; 481 482 snprintf(bi_path.bootpath, sizeof(bi_path.bootpath), name); 483 if (dlp->d_partitions[part].p_fstype == FS_BSDFFS) { 484 if ((error = ffsv2_open(name, f)) == 0) { 485 fs = &fs_ffsv2; 486 goto found; 487 } 488 if (error == EINVAL && (error = ffsv1_open(name, f)) == 0) { 489 fs = &fs_ffsv1; 490 goto found; 491 } 492 return error; 493 } 494 return ENXIO; 495 found: 496 d->fsops = fs; 497 f->f_devdata = d; 498 499 /* build btinfo to identify disk device */ 500 snprintf(bi_rdev.devname, sizeof(bi_rdev.devname), "wd"); 501 bi_rdev.cookie = d->unittag; /* disk unit number */ 502 return 0; 503 } 504 505 int 506 dsk_close(struct open_file *f) 507 { 508 struct disk *d = f->f_devdata; 509 struct fs_ops *fs = d->fsops; 510 511 (*fs->close)(f); 512 d->fsops = NULL; 513 f->f_devdata = NULL; 514 return 0; 515 } 516 517 int 518 dsk_strategy(void *devdata, int rw, daddr_t dblk, size_t size, 519 void *p, size_t *rsize) 520 { 521 struct disk *d = devdata; 522 struct disklabel *dlp; 523 int64_t bno; 524 525 if (size == 0) 526 return 0; 527 if (rw != F_READ) 528 return EOPNOTSUPP; 529 530 bno = dblk; 531 if ((dlp = d->dlabel) != NULL) 532 bno += dlp->d_partitions[d->part].p_offset; 533 (*d->lba_read)(d, bno, size / 512, p); 534 if (rsize != NULL) 535 *rsize = size; 536 return 0; 537 } 538 539 struct fs_ops * 540 dsk_fsops(struct open_file *f) 541 { 542 struct disk *d = f->f_devdata; 543 544 return d->fsops; 545 } 546
Indexes created Tue Sep 30 20:09:53 GMT 2025