ed_mca.c revision 1.35.2.1
1 /* $NetBSD: ed_mca.c,v 1.35.2.1 2007/05/13 17:36:26 ad Exp $ */ 2 3 /* 4 * Copyright (c) 2001 The NetBSD Foundation, Inc. 5 * 6 * This code is derived from software contributed to The NetBSD Foundation 7 * by Jaromir Dolecek. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the NetBSD 20 * Foundation, Inc. and its contributors. 21 * 4. The name of the author may not be used to endorse or promote products 22 * derived from this software without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 27 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 28 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 29 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 30 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 33 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 /* 37 * Disk drive goo for MCA ESDI controller driver. 38 */ 39 40 #include <sys/cdefs.h> 41 __KERNEL_RCSID(0, "$NetBSD: ed_mca.c,v 1.35.2.1 2007/05/13 17:36:26 ad Exp $"); 42 43 #include "rnd.h" 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/kernel.h> 48 #include <sys/conf.h> 49 #include <sys/file.h> 50 #include <sys/stat.h> 51 #include <sys/ioctl.h> 52 #include <sys/buf.h> 53 #include <sys/bufq.h> 54 #include <sys/uio.h> 55 #include <sys/malloc.h> 56 #include <sys/device.h> 57 #include <sys/disklabel.h> 58 #include <sys/disk.h> 59 #include <sys/syslog.h> 60 #include <sys/proc.h> 61 #include <sys/vnode.h> 62 #if NRND > 0 63 #include <sys/rnd.h> 64 #endif 65 66 #include <machine/intr.h> 67 #include <machine/bus.h> 68 69 #include <dev/mca/mcavar.h> 70 71 #include <dev/mca/edcreg.h> 72 #include <dev/mca/edvar.h> 73 #include <dev/mca/edcvar.h> 74 75 /* #define ATADEBUG */ 76 77 #ifdef ATADEBUG 78 #define ATADEBUG_PRINT(args, level) printf args 79 #else 80 #define ATADEBUG_PRINT(args, level) 81 #endif 82 83 #define EDLABELDEV(dev) (MAKEDISKDEV(major(dev), DISKUNIT(dev), RAW_PART)) 84 85 static int ed_mca_probe (struct device *, struct cfdata *, void *); 86 static void ed_mca_attach (struct device *, struct device *, void *); 87 88 CFATTACH_DECL(ed_mca, sizeof(struct ed_softc), 89 ed_mca_probe, ed_mca_attach, NULL, NULL); 90 91 extern struct cfdriver ed_cd; 92 93 static int ed_get_params(struct ed_softc *, int *); 94 static void edgetdisklabel(dev_t, struct ed_softc *); 95 static void edgetdefaultlabel(struct ed_softc *, struct disklabel *); 96 97 dev_type_open(edmcaopen); 98 dev_type_close(edmcaclose); 99 dev_type_read(edmcaread); 100 dev_type_write(edmcawrite); 101 dev_type_ioctl(edmcaioctl); 102 dev_type_strategy(edmcastrategy); 103 dev_type_dump(edmcadump); 104 dev_type_size(edmcasize); 105 106 const struct bdevsw ed_bdevsw = { 107 edmcaopen, edmcaclose, edmcastrategy, edmcaioctl, 108 edmcadump, edmcasize, D_DISK 109 }; 110 111 const struct cdevsw ed_cdevsw = { 112 edmcaopen, edmcaclose, edmcaread, edmcawrite, edmcaioctl, 113 nostop, notty, nopoll, nommap, nokqfilter, D_DISK 114 }; 115 116 static struct dkdriver eddkdriver = { edmcastrategy, minphys }; 117 118 /* 119 * Just check if it's possible to identify the disk. 120 */ 121 static int 122 ed_mca_probe(struct device *parent, struct cfdata *cf, 123 void *aux) 124 { 125 u_int16_t cmd_args[2]; 126 struct edc_mca_softc *sc = (void *) parent; 127 struct ed_attach_args *eda = (struct ed_attach_args *) aux; 128 int found = 1; 129 130 /* 131 * Get Device Configuration (09). 132 */ 133 cmd_args[0] = 14; /* Options: 00s110, s: 0=Physical 1=Pseudo */ 134 cmd_args[1] = 0; 135 if (edc_run_cmd(sc, CMD_GET_DEV_CONF, eda->edc_drive, cmd_args, 2, 1)) 136 found = 0; 137 138 return (found); 139 } 140 141 static void 142 ed_mca_attach(parent, self, aux) 143 struct device *parent, *self; 144 void *aux; 145 { 146 struct ed_softc *ed = device_private(self); 147 struct edc_mca_softc *sc = device_private(parent); 148 struct ed_attach_args *eda = (struct ed_attach_args *) aux; 149 char pbuf[8]; 150 int drv_flags; 151 152 ed->edc_softc = sc; 153 ed->sc_devno = eda->edc_drive; 154 edc_add_disk(sc, ed); 155 156 bufq_alloc(&ed->sc_q, "disksort", BUFQ_SORT_RAWBLOCK); 157 simple_lock_init(&ed->sc_q_lock); 158 159 if (ed_get_params(ed, &drv_flags)) { 160 printf(": IDENTIFY failed, no disk found\n"); 161 return; 162 } 163 164 format_bytes(pbuf, sizeof(pbuf), 165 (u_int64_t) ed->sc_capacity * DEV_BSIZE); 166 printf(": %s, %u cyl, %u head, %u sec, 512 bytes/sect x %u sectors\n", 167 pbuf, 168 ed->cyl, ed->heads, ed->sectors, 169 ed->sc_capacity); 170 171 printf("%s: %u spares/cyl, %s, %s, %s, %s, %s\n", 172 ed->sc_dev.dv_xname, ed->spares, 173 (drv_flags & (1 << 0)) ? "NoRetries" : "Retries", 174 (drv_flags & (1 << 1)) ? "Removable" : "Fixed", 175 (drv_flags & (1 << 2)) ? "SkewedFormat" : "NoSkew", 176 (drv_flags & (1 << 3)) ? "ZeroDefect" : "Defects", 177 (drv_flags & (1 << 4)) ? "InvalidSecondary" : "SecondaryOK" 178 ); 179 180 /* 181 * Initialize and attach the disk structure. 182 */ 183 ed->sc_dk.dk_driver = &eddkdriver; 184 ed->sc_dk.dk_name = ed->sc_dev.dv_xname; 185 disk_attach(&ed->sc_dk); 186 #if NRND > 0 187 rnd_attach_source(&ed->rnd_source, ed->sc_dev.dv_xname, 188 RND_TYPE_DISK, 0); 189 #endif 190 191 ed->sc_flags |= EDF_INIT; 192 193 /* 194 * XXX We should try to discovery wedges here, but 195 * XXX that would mean being able to do I/O. Should 196 * XXX use config_defer() here. 197 */ 198 } 199 200 /* 201 * Read/write routine for a buffer. Validates the arguments and schedules the 202 * transfer. Does not wait for the transfer to complete. 203 */ 204 void 205 edmcastrategy(bp) 206 struct buf *bp; 207 { 208 struct ed_softc *ed = device_lookup(&ed_cd, DISKUNIT(bp->b_dev)); 209 struct disklabel *lp = ed->sc_dk.dk_label; 210 daddr_t blkno; 211 int error = 0; 212 213 ATADEBUG_PRINT(("edmcastrategy (%s)\n", ed->sc_dev.dv_xname), 214 DEBUG_XFERS); 215 216 /* Valid request? */ 217 if (bp->b_blkno < 0 || 218 (bp->b_bcount % lp->d_secsize) != 0 || 219 (bp->b_bcount / lp->d_secsize) >= (1 << NBBY)) { 220 error = EINVAL; 221 goto done; 222 } 223 224 /* If device invalidated (e.g. media change, door open), error. */ 225 if ((ed->sc_flags & WDF_LOADED) == 0) { 226 error = EIO; 227 goto done; 228 } 229 230 /* If it's a null transfer, return immediately. */ 231 if (bp->b_bcount == 0) 232 goto done; 233 234 /* 235 * Do bounds checking, adjust transfer. if error, process. 236 * If end of partition, just return. 237 */ 238 if (DISKPART(bp->b_dev) != RAW_PART && 239 bounds_check_with_label(&ed->sc_dk, bp, 240 (ed->sc_flags & (WDF_WLABEL|WDF_LABELLING)) != 0) <= 0) 241 goto done; 242 243 /* 244 * Now convert the block number to absolute and put it in 245 * terms of the device's logical block size. 246 */ 247 if (lp->d_secsize >= DEV_BSIZE) 248 blkno = bp->b_blkno / (lp->d_secsize / DEV_BSIZE); 249 else 250 blkno = bp->b_blkno * (DEV_BSIZE / lp->d_secsize); 251 252 if (DISKPART(bp->b_dev) != RAW_PART) 253 blkno += lp->d_partitions[DISKPART(bp->b_dev)].p_offset; 254 255 bp->b_rawblkno = blkno; 256 257 /* Queue transfer on drive, activate drive and controller if idle. */ 258 simple_lock(&ed->sc_q_lock); 259 BUFQ_PUT(ed->sc_q, bp); 260 simple_unlock(&ed->sc_q_lock); 261 262 /* Ring the worker thread */ 263 wakeup_one(ed->edc_softc); 264 265 return; 266 done: 267 /* Toss transfer; we're done early. */ 268 biodone(bp, error, bp->b_bcount); 269 } 270 271 int 272 edmcaread(dev_t dev, struct uio *uio, int flags) 273 { 274 ATADEBUG_PRINT(("edread\n"), DEBUG_XFERS); 275 return (physio(edmcastrategy, NULL, dev, B_READ, minphys, uio)); 276 } 277 278 int 279 edmcawrite(dev_t dev, struct uio *uio, int flags) 280 { 281 ATADEBUG_PRINT(("edwrite\n"), DEBUG_XFERS); 282 return (physio(edmcastrategy, NULL, dev, B_WRITE, minphys, uio)); 283 } 284 285 int 286 edmcaopen(dev_t dev, int flag, int fmt, struct lwp *l) 287 { 288 struct ed_softc *wd; 289 int part, error; 290 291 ATADEBUG_PRINT(("edopen\n"), DEBUG_FUNCS); 292 wd = device_lookup(&ed_cd, DISKUNIT(dev)); 293 if (wd == NULL || (wd->sc_flags & EDF_INIT) == 0) 294 return (ENXIO); 295 296 part = DISKPART(dev); 297 298 if ((error = lockmgr(&wd->sc_dk.dk_openlock, LK_EXCLUSIVE, NULL)) != 0) 299 return (error); 300 301 /* 302 * If there are wedges, and this is not RAW_PART, then we 303 * need to fail. 304 */ 305 if (wd->sc_dk.dk_nwedges != 0 && part != RAW_PART) { 306 error = EBUSY; 307 goto bad1; 308 } 309 310 if (wd->sc_dk.dk_openmask != 0) { 311 /* 312 * If any partition is open, but the disk has been invalidated, 313 * disallow further opens. 314 */ 315 if ((wd->sc_flags & WDF_LOADED) == 0) { 316 error = EIO; 317 goto bad1; 318 } 319 } else { 320 if ((wd->sc_flags & WDF_LOADED) == 0) { 321 int s; 322 323 wd->sc_flags |= WDF_LOADED; 324 325 /* Load the physical device parameters. */ 326 s = splbio(); 327 ed_get_params(wd, NULL); 328 splx(s); 329 330 /* Load the partition info if not already loaded. */ 331 edgetdisklabel(dev, wd); 332 } 333 } 334 335 /* Check that the partition exists. */ 336 if (part != RAW_PART && 337 (part >= wd->sc_dk.dk_label->d_npartitions || 338 wd->sc_dk.dk_label->d_partitions[part].p_fstype == FS_UNUSED)) { 339 error = ENXIO; 340 goto bad1; 341 } 342 343 /* Insure only one open at a time. */ 344 switch (fmt) { 345 case S_IFCHR: 346 wd->sc_dk.dk_copenmask |= (1 << part); 347 break; 348 case S_IFBLK: 349 wd->sc_dk.dk_bopenmask |= (1 << part); 350 break; 351 } 352 wd->sc_dk.dk_openmask = 353 wd->sc_dk.dk_copenmask | wd->sc_dk.dk_bopenmask; 354 355 (void) lockmgr(&wd->sc_dk.dk_openlock, LK_RELEASE, NULL); 356 return 0; 357 358 bad1: 359 (void) lockmgr(&wd->sc_dk.dk_openlock, LK_RELEASE, NULL); 360 return (error); 361 } 362 363 int 364 edmcaclose(dev_t dev, int flag, int fmt, struct lwp *l) 365 { 366 struct ed_softc *wd = device_lookup(&ed_cd, DISKUNIT(dev)); 367 int part = DISKPART(dev); 368 int error; 369 370 ATADEBUG_PRINT(("edmcaclose\n"), DEBUG_FUNCS); 371 372 if ((error = lockmgr(&wd->sc_dk.dk_openlock, LK_EXCLUSIVE, NULL)) != 0) 373 return (error); 374 375 switch (fmt) { 376 case S_IFCHR: 377 wd->sc_dk.dk_copenmask &= ~(1 << part); 378 break; 379 case S_IFBLK: 380 wd->sc_dk.dk_bopenmask &= ~(1 << part); 381 break; 382 } 383 wd->sc_dk.dk_openmask = 384 wd->sc_dk.dk_copenmask | wd->sc_dk.dk_bopenmask; 385 386 if (wd->sc_dk.dk_openmask == 0) { 387 #if 0 388 wd_flushcache(wd, AT_WAIT); 389 #endif 390 /* XXXX Must wait for I/O to complete! */ 391 392 if (! (wd->sc_flags & WDF_KLABEL)) 393 wd->sc_flags &= ~WDF_LOADED; 394 } 395 396 (void) lockmgr(&wd->sc_dk.dk_openlock, LK_RELEASE, NULL); 397 398 return 0; 399 } 400 401 static void 402 edgetdefaultlabel(ed, lp) 403 struct ed_softc *ed; 404 struct disklabel *lp; 405 { 406 ATADEBUG_PRINT(("edgetdefaultlabel\n"), DEBUG_FUNCS); 407 memset(lp, 0, sizeof(struct disklabel)); 408 409 lp->d_secsize = DEV_BSIZE; 410 lp->d_ntracks = ed->heads; 411 lp->d_nsectors = ed->sectors; 412 lp->d_ncylinders = ed->cyl; 413 lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors; 414 415 lp->d_type = DTYPE_ESDI; 416 417 strncpy(lp->d_typename, "ESDI", 16); 418 strncpy(lp->d_packname, "fictitious", 16); 419 lp->d_secperunit = ed->sc_capacity; 420 lp->d_rpm = 3600; 421 lp->d_interleave = 1; 422 lp->d_flags = 0; 423 424 lp->d_partitions[RAW_PART].p_offset = 0; 425 lp->d_partitions[RAW_PART].p_size = 426 lp->d_secperunit * (lp->d_secsize / DEV_BSIZE); 427 lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED; 428 lp->d_npartitions = RAW_PART + 1; 429 430 lp->d_magic = DISKMAGIC; 431 lp->d_magic2 = DISKMAGIC; 432 lp->d_checksum = dkcksum(lp); 433 } 434 435 /* 436 * Fabricate a default disk label, and try to read the correct one. 437 */ 438 static void 439 edgetdisklabel(dev, ed) 440 dev_t dev; 441 struct ed_softc *ed; 442 { 443 struct disklabel *lp = ed->sc_dk.dk_label; 444 const char *errstring; 445 446 ATADEBUG_PRINT(("edgetdisklabel\n"), DEBUG_FUNCS); 447 448 memset(ed->sc_dk.dk_cpulabel, 0, sizeof(struct cpu_disklabel)); 449 450 edgetdefaultlabel(ed, lp); 451 452 errstring = readdisklabel( 453 EDLABELDEV(dev), edmcastrategy, lp, ed->sc_dk.dk_cpulabel); 454 if (errstring) { 455 /* 456 * This probably happened because the drive's default 457 * geometry doesn't match the DOS geometry. We 458 * assume the DOS geometry is now in the label and try 459 * again. XXX This is a kluge. 460 */ 461 #if 0 462 if (wd->drvp->state > RECAL) 463 wd->drvp->drive_flags |= DRIVE_RESET; 464 #endif 465 errstring = readdisklabel(EDLABELDEV(dev), 466 edmcastrategy, lp, ed->sc_dk.dk_cpulabel); 467 } 468 if (errstring) { 469 printf("%s: %s\n", ed->sc_dev.dv_xname, errstring); 470 return; 471 } 472 } 473 474 int 475 edmcaioctl(dev, xfer, addr, flag, l) 476 dev_t dev; 477 u_long xfer; 478 void *addr; 479 int flag; 480 struct lwp *l; 481 { 482 struct ed_softc *ed = device_lookup(&ed_cd, DISKUNIT(dev)); 483 int error; 484 485 ATADEBUG_PRINT(("edioctl\n"), DEBUG_FUNCS); 486 487 if ((ed->sc_flags & WDF_LOADED) == 0) 488 return EIO; 489 490 switch (xfer) { 491 case DIOCGDINFO: 492 *(struct disklabel *)addr = *(ed->sc_dk.dk_label); 493 return 0; 494 495 case DIOCGPART: 496 ((struct partinfo *)addr)->disklab = ed->sc_dk.dk_label; 497 ((struct partinfo *)addr)->part = 498 &ed->sc_dk.dk_label->d_partitions[DISKPART(dev)]; 499 return 0; 500 501 case DIOCWDINFO: 502 case DIOCSDINFO: 503 { 504 struct disklabel *lp; 505 506 lp = (struct disklabel *)addr; 507 508 if ((flag & FWRITE) == 0) 509 return EBADF; 510 511 if ((error = lockmgr(&ed->sc_dk.dk_openlock, LK_EXCLUSIVE, 512 NULL)) != 0) 513 return (error); 514 ed->sc_flags |= WDF_LABELLING; 515 516 error = setdisklabel(ed->sc_dk.dk_label, 517 lp, /*wd->sc_dk.dk_openmask : */0, 518 ed->sc_dk.dk_cpulabel); 519 if (error == 0) { 520 #if 0 521 if (wd->drvp->state > RECAL) 522 wd->drvp->drive_flags |= DRIVE_RESET; 523 #endif 524 if (xfer == DIOCWDINFO) 525 error = writedisklabel(EDLABELDEV(dev), 526 edmcastrategy, ed->sc_dk.dk_label, 527 ed->sc_dk.dk_cpulabel); 528 } 529 530 ed->sc_flags &= ~WDF_LABELLING; 531 (void) lockmgr(&ed->sc_dk.dk_openlock, LK_RELEASE, NULL); 532 return (error); 533 } 534 535 case DIOCKLABEL: 536 if (*(int *)addr) 537 ed->sc_flags |= WDF_KLABEL; 538 else 539 ed->sc_flags &= ~WDF_KLABEL; 540 return 0; 541 542 case DIOCWLABEL: 543 if ((flag & FWRITE) == 0) 544 return EBADF; 545 if (*(int *)addr) 546 ed->sc_flags |= WDF_WLABEL; 547 else 548 ed->sc_flags &= ~WDF_WLABEL; 549 return 0; 550 551 case DIOCGDEFLABEL: 552 edgetdefaultlabel(ed, (struct disklabel *)addr); 553 return 0; 554 555 #if 0 556 case DIOCWFORMAT: 557 if ((flag & FWRITE) == 0) 558 return EBADF; 559 { 560 register struct format_op *fop; 561 struct iovec aiov; 562 struct uio auio; 563 564 fop = (struct format_op *)addr; 565 aiov.iov_base = fop->df_buf; 566 aiov.iov_len = fop->df_count; 567 auio.uio_iov = &aiov; 568 auio.uio_iovcnt = 1; 569 auio.uio_resid = fop->df_count; 570 auio.uio_segflg = 0; 571 auio.uio_offset = 572 fop->df_startblk * wd->sc_dk.dk_label->d_secsize; 573 auio.uio_lwp = l; 574 error = physio(wdformat, NULL, dev, B_WRITE, minphys, 575 &auio); 576 fop->df_count -= auio.uio_resid; 577 fop->df_reg[0] = wdc->sc_status; 578 fop->df_reg[1] = wdc->sc_error; 579 return error; 580 } 581 #endif 582 583 case DIOCAWEDGE: 584 { 585 struct dkwedge_info *dkw = (void *) addr; 586 587 if ((flag & FWRITE) == 0) 588 return (EBADF); 589 590 /* If the ioctl happens here, the parent is us. */ 591 strcpy(dkw->dkw_parent, ed->sc_dev.dv_xname); 592 return (dkwedge_add(dkw)); 593 } 594 595 case DIOCDWEDGE: 596 { 597 struct dkwedge_info *dkw = (void *) addr; 598 599 if ((flag & FWRITE) == 0) 600 return (EBADF); 601 602 /* If the ioctl happens here, the parent is us. */ 603 strcpy(dkw->dkw_parent, ed->sc_dev.dv_xname); 604 return (dkwedge_del(dkw)); 605 } 606 607 case DIOCLWEDGES: 608 { 609 struct dkwedge_list *dkwl = (void *) addr; 610 611 return (dkwedge_list(&ed->sc_dk, dkwl, l)); 612 } 613 614 default: 615 return ENOTTY; 616 } 617 618 #ifdef DIAGNOSTIC 619 panic("edioctl: impossible"); 620 #endif 621 } 622 623 int 624 edmcasize(dev) 625 dev_t dev; 626 { 627 struct ed_softc *wd; 628 int part, omask; 629 int size; 630 631 ATADEBUG_PRINT(("edsize\n"), DEBUG_FUNCS); 632 633 wd = device_lookup(&ed_cd, DISKUNIT(dev)); 634 if (wd == NULL) 635 return (-1); 636 637 part = DISKPART(dev); 638 omask = wd->sc_dk.dk_openmask & (1 << part); 639 640 if (omask == 0 && edmcaopen(dev, 0, S_IFBLK, NULL) != 0) 641 return (-1); 642 if (wd->sc_dk.dk_label->d_partitions[part].p_fstype != FS_SWAP) 643 size = -1; 644 else 645 size = wd->sc_dk.dk_label->d_partitions[part].p_size * 646 (wd->sc_dk.dk_label->d_secsize / DEV_BSIZE); 647 if (omask == 0 && edmcaclose(dev, 0, S_IFBLK, NULL) != 0) 648 return (-1); 649 return (size); 650 } 651 652 /* #define WD_DUMP_NOT_TRUSTED if you just want to watch */ 653 static int eddoingadump = 0; 654 static int eddumprecalibrated = 0; 655 static int eddumpmulti = 1; 656 657 /* 658 * Dump core after a system crash. 659 */ 660 int 661 edmcadump(dev, blkno, va, size) 662 dev_t dev; 663 daddr_t blkno; 664 void *va; 665 size_t size; 666 { 667 struct ed_softc *ed; /* disk unit to do the I/O */ 668 struct disklabel *lp; /* disk's disklabel */ 669 int part; 670 int nblks; /* total number of sectors left to write */ 671 int error; 672 673 /* Check if recursive dump; if so, punt. */ 674 if (eddoingadump) 675 return EFAULT; 676 eddoingadump = 1; 677 678 ed = device_lookup(&ed_cd, DISKUNIT(dev)); 679 if (ed == NULL) 680 return (ENXIO); 681 682 part = DISKPART(dev); 683 684 /* Make sure it was initialized. */ 685 if ((ed->sc_flags & EDF_INIT) == 0) 686 return ENXIO; 687 688 /* Convert to disk sectors. Request must be a multiple of size. */ 689 lp = ed->sc_dk.dk_label; 690 if ((size % lp->d_secsize) != 0) 691 return EFAULT; 692 nblks = size / lp->d_secsize; 693 blkno = blkno / (lp->d_secsize / DEV_BSIZE); 694 695 /* Check transfer bounds against partition size. */ 696 if ((blkno < 0) || ((blkno + nblks) > lp->d_partitions[part].p_size)) 697 return EINVAL; 698 699 /* Offset block number to start of partition. */ 700 blkno += lp->d_partitions[part].p_offset; 701 702 /* Recalibrate, if first dump transfer. */ 703 if (eddumprecalibrated == 0) { 704 eddumprecalibrated = 1; 705 eddumpmulti = 8; 706 #if 0 707 wd->drvp->state = RESET; 708 #endif 709 } 710 711 while (nblks > 0) { 712 error = edc_bio(ed->edc_softc, ed, va, blkno, 713 min(nblks, eddumpmulti) * lp->d_secsize, 0, 1); 714 if (error) 715 return (error); 716 717 /* update block count */ 718 nblks -= min(nblks, eddumpmulti); 719 blkno += min(nblks, eddumpmulti); 720 va = (char *)va + min(nblks, eddumpmulti) * lp->d_secsize; 721 } 722 723 eddoingadump = 0; 724 return (0); 725 } 726 727 static int 728 ed_get_params(ed, drv_flags) 729 struct ed_softc *ed; 730 int *drv_flags; 731 { 732 u_int16_t cmd_args[2]; 733 734 /* 735 * Get Device Configuration (09). 736 */ 737 cmd_args[0] = 14; /* Options: 00s110, s: 0=Physical 1=Pseudo */ 738 cmd_args[1] = 0; 739 if (edc_run_cmd(ed->edc_softc, CMD_GET_DEV_CONF, ed->sc_devno, 740 cmd_args, 2, 1)) 741 return (1); 742 743 ed->spares = ed->sense_data[1] >> 8; 744 if (drv_flags) 745 *drv_flags = ed->sense_data[1] & 0x1f; 746 ed->rba = ed->sense_data[2] | (ed->sense_data[3] << 16); 747 /* Instead of using: 748 ed->cyl = ed->sense_data[4]; 749 ed->heads = ed->sense_data[5] & 0xff; 750 ed->sectors = ed->sense_data[5] >> 8; 751 * we fabricate the numbers from RBA count, so that 752 * number of sectors is 32 and heads 64. This seems 753 * to be necessary for integrated ESDI controller. 754 */ 755 ed->sectors = 32; 756 ed->heads = 64; 757 ed->cyl = ed->rba / (ed->heads * ed->sectors); 758 ed->sc_capacity = ed->rba; 759 760 return (0); 761 } 762
Indexes created Mon Oct 13 01:09:56 GMT 2025