ed_mca.c revision 1.22.2.6
1 /* $NetBSD: ed_mca.c,v 1.22.2.6 2004/10/19 15:56:57 skrll 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 1.22.2.6 2004/10/19 15:56:57 skrll 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/uio.h> 54 #include <sys/malloc.h> 55 #include <sys/device.h> 56 #include <sys/disklabel.h> 57 #include <sys/disk.h> 58 #include <sys/syslog.h> 59 #include <sys/proc.h> 60 #include <sys/vnode.h> 61 #if NRND > 0 62 #include <sys/rnd.h> 63 #endif 64 65 #include <machine/intr.h> 66 #include <machine/bus.h> 67 68 #include <dev/mca/mcavar.h> 69 70 #include <dev/mca/edcreg.h> 71 #include <dev/mca/edvar.h> 72 #include <dev/mca/edcvar.h> 73 74 /* #define ATADEBUG */ 75 76 #ifdef ATADEBUG 77 #define ATADEBUG_PRINT(args, level) printf args 78 #else 79 #define ATADEBUG_PRINT(args, level) 80 #endif 81 82 #define EDLABELDEV(dev) (MAKEDISKDEV(major(dev), DISKUNIT(dev), RAW_PART)) 83 84 static int ed_mca_probe __P((struct device *, struct cfdata *, void *)); 85 static void ed_mca_attach __P((struct device *, struct device *, void *)); 86 87 CFATTACH_DECL(ed_mca, sizeof(struct ed_softc), 88 ed_mca_probe, ed_mca_attach, NULL, NULL); 89 90 extern struct cfdriver ed_cd; 91 92 static int ed_get_params __P((struct ed_softc *, int *)); 93 static void edgetdisklabel __P((dev_t, struct ed_softc *)); 94 static void edgetdefaultlabel __P((struct ed_softc *, struct disklabel *)); 95 96 dev_type_open(edmcaopen); 97 dev_type_close(edmcaclose); 98 dev_type_read(edmcaread); 99 dev_type_write(edmcawrite); 100 dev_type_ioctl(edmcaioctl); 101 dev_type_strategy(edmcastrategy); 102 dev_type_dump(edmcadump); 103 dev_type_size(edmcasize); 104 105 const struct bdevsw ed_bdevsw = { 106 edmcaopen, edmcaclose, edmcastrategy, edmcaioctl, 107 edmcadump, edmcasize, D_DISK 108 }; 109 110 const struct cdevsw ed_cdevsw = { 111 edmcaopen, edmcaclose, edmcaread, edmcawrite, edmcaioctl, 112 nostop, notty, nopoll, nommap, nokqfilter, D_DISK 113 }; 114 115 static struct dkdriver eddkdriver = { edmcastrategy, minphys }; 116 117 /* 118 * Just check if it's possible to identify the disk. 119 */ 120 static int 121 ed_mca_probe(parent, cf, aux) 122 struct device *parent; 123 struct cfdata *cf; 124 void *aux; 125 { 126 u_int16_t cmd_args[2]; 127 struct edc_mca_softc *sc = (void *) parent; 128 struct ed_attach_args *eda = (struct ed_attach_args *) aux; 129 int found = 1; 130 131 /* 132 * Get Device Configuration (09). 133 */ 134 cmd_args[0] = 14; /* Options: 00s110, s: 0=Physical 1=Pseudo */ 135 cmd_args[1] = 0; 136 if (edc_run_cmd(sc, CMD_GET_DEV_CONF, eda->edc_drive, cmd_args, 2, 1)) 137 found = 0; 138 139 return (found); 140 } 141 142 static void 143 ed_mca_attach(parent, self, aux) 144 struct device *parent, *self; 145 void *aux; 146 { 147 struct ed_softc *ed = (void *) self; 148 struct edc_mca_softc *sc = (void *) parent; 149 struct ed_attach_args *eda = (struct ed_attach_args *) aux; 150 char pbuf[8]; 151 int drv_flags; 152 153 ed->edc_softc = sc; 154 ed->sc_devno = eda->edc_drive; 155 edc_add_disk(sc, ed); 156 157 bufq_alloc(&ed->sc_q, BUFQ_DISKSORT|BUFQ_SORT_RAWBLOCK); 158 simple_lock_init(&ed->sc_q_lock); 159 160 if (ed_get_params(ed, &drv_flags)) { 161 printf(": IDENTIFY failed, no disk found\n"); 162 return; 163 } 164 165 format_bytes(pbuf, sizeof(pbuf), 166 (u_int64_t) ed->sc_capacity * DEV_BSIZE); 167 printf(": %s, %u cyl, %u head, %u sec, 512 bytes/sect x %u sectors\n", 168 pbuf, 169 ed->cyl, ed->heads, ed->sectors, 170 ed->sc_capacity); 171 172 printf("%s: %u spares/cyl, %s, %s, %s, %s, %s\n", 173 ed->sc_dev.dv_xname, ed->spares, 174 (drv_flags & (1 << 0)) ? "NoRetries" : "Retries", 175 (drv_flags & (1 << 1)) ? "Removable" : "Fixed", 176 (drv_flags & (1 << 2)) ? "SkewedFormat" : "NoSkew", 177 (drv_flags & (1 << 3)) ? "ZeroDefect" : "Defects", 178 (drv_flags & (1 << 4)) ? "InvalidSecondary" : "SecondaryOK" 179 ); 180 181 /* 182 * Initialize and attach the disk structure. 183 */ 184 ed->sc_dk.dk_driver = &eddkdriver; 185 ed->sc_dk.dk_name = ed->sc_dev.dv_xname; 186 disk_attach(&ed->sc_dk); 187 #if NRND > 0 188 rnd_attach_source(&ed->rnd_source, ed->sc_dev.dv_xname, 189 RND_TYPE_DISK, 0); 190 #endif 191 192 ed->sc_flags |= EDF_INIT; 193 194 /* 195 * XXX We should try to discovery wedges here, but 196 * XXX that would mean being able to do I/O. Should 197 * XXX use config_defer() here. 198 */ 199 } 200 201 /* 202 * Read/write routine for a buffer. Validates the arguments and schedules the 203 * transfer. Does not wait for the transfer to complete. 204 */ 205 void 206 edmcastrategy(bp) 207 struct buf *bp; 208 { 209 struct ed_softc *ed = device_lookup(&ed_cd, DISKUNIT(bp->b_dev)); 210 struct disklabel *lp = ed->sc_dk.dk_label; 211 daddr_t blkno; 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 bp->b_error = EINVAL; 221 goto bad; 222 } 223 224 /* If device invalidated (e.g. media change, door open), error. */ 225 if ((ed->sc_flags & WDF_LOADED) == 0) { 226 bp->b_error = EIO; 227 goto bad; 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 bad: 267 bp->b_flags |= B_ERROR; 268 done: 269 /* Toss transfer; we're done early. */ 270 bp->b_resid = bp->b_bcount; 271 biodone(bp); 272 } 273 274 int 275 edmcaread(dev, uio, flags) 276 dev_t dev; 277 struct uio *uio; 278 int flags; 279 { 280 ATADEBUG_PRINT(("edread\n"), DEBUG_XFERS); 281 return (physio(edmcastrategy, NULL, dev, B_READ, minphys, uio)); 282 } 283 284 int 285 edmcawrite(dev, uio, flags) 286 dev_t dev; 287 struct uio *uio; 288 int flags; 289 { 290 ATADEBUG_PRINT(("edwrite\n"), DEBUG_XFERS); 291 return (physio(edmcastrategy, NULL, dev, B_WRITE, minphys, uio)); 292 } 293 294 int 295 edmcaopen(dev, flag, fmt, l) 296 dev_t dev; 297 int flag, fmt; 298 struct lwp *l; 299 { 300 struct ed_softc *wd; 301 int part, error; 302 303 ATADEBUG_PRINT(("edopen\n"), DEBUG_FUNCS); 304 wd = device_lookup(&ed_cd, DISKUNIT(dev)); 305 if (wd == NULL || (wd->sc_flags & EDF_INIT) == 0) 306 return (ENXIO); 307 308 part = DISKPART(dev); 309 310 if ((error = lockmgr(&wd->sc_dk.dk_openlock, LK_EXCLUSIVE, NULL)) != 0) 311 return (error); 312 313 /* 314 * If there are wedges, and this is not RAW_PART, then we 315 * need to fail. 316 */ 317 if (wd->sc_dk.dk_nwedges != 0 && part != RAW_PART) { 318 error = EBUSY; 319 goto bad1; 320 } 321 322 if (wd->sc_dk.dk_openmask != 0) { 323 /* 324 * If any partition is open, but the disk has been invalidated, 325 * disallow further opens. 326 */ 327 if ((wd->sc_flags & WDF_LOADED) == 0) { 328 error = EIO; 329 goto bad1; 330 } 331 } else { 332 if ((wd->sc_flags & WDF_LOADED) == 0) { 333 int s; 334 335 wd->sc_flags |= WDF_LOADED; 336 337 /* Load the physical device parameters. */ 338 s = splbio(); 339 ed_get_params(wd, NULL); 340 splx(s); 341 342 /* Load the partition info if not already loaded. */ 343 edgetdisklabel(dev, wd); 344 } 345 } 346 347 /* Check that the partition exists. */ 348 if (part != RAW_PART && 349 (part >= wd->sc_dk.dk_label->d_npartitions || 350 wd->sc_dk.dk_label->d_partitions[part].p_fstype == FS_UNUSED)) { 351 error = ENXIO; 352 goto bad1; 353 } 354 355 /* Insure only one open at a time. */ 356 switch (fmt) { 357 case S_IFCHR: 358 wd->sc_dk.dk_copenmask |= (1 << part); 359 break; 360 case S_IFBLK: 361 wd->sc_dk.dk_bopenmask |= (1 << part); 362 break; 363 } 364 wd->sc_dk.dk_openmask = 365 wd->sc_dk.dk_copenmask | wd->sc_dk.dk_bopenmask; 366 367 (void) lockmgr(&wd->sc_dk.dk_openlock, LK_RELEASE, NULL); 368 return 0; 369 370 bad1: 371 (void) lockmgr(&wd->sc_dk.dk_openlock, LK_RELEASE, NULL); 372 return (error); 373 } 374 375 int 376 edmcaclose(dev, flag, fmt, l) 377 dev_t dev; 378 int flag, fmt; 379 struct lwp *l; 380 { 381 struct ed_softc *wd = device_lookup(&ed_cd, DISKUNIT(dev)); 382 int part = DISKPART(dev); 383 int error; 384 385 ATADEBUG_PRINT(("edmcaclose\n"), DEBUG_FUNCS); 386 387 if ((error = lockmgr(&wd->sc_dk.dk_openlock, LK_EXCLUSIVE, NULL)) != 0) 388 return (error); 389 390 switch (fmt) { 391 case S_IFCHR: 392 wd->sc_dk.dk_copenmask &= ~(1 << part); 393 break; 394 case S_IFBLK: 395 wd->sc_dk.dk_bopenmask &= ~(1 << part); 396 break; 397 } 398 wd->sc_dk.dk_openmask = 399 wd->sc_dk.dk_copenmask | wd->sc_dk.dk_bopenmask; 400 401 if (wd->sc_dk.dk_openmask == 0) { 402 #if 0 403 wd_flushcache(wd, AT_WAIT); 404 #endif 405 /* XXXX Must wait for I/O to complete! */ 406 407 if (! (wd->sc_flags & WDF_KLABEL)) 408 wd->sc_flags &= ~WDF_LOADED; 409 } 410 411 (void) lockmgr(&wd->sc_dk.dk_openlock, LK_RELEASE, NULL); 412 413 return 0; 414 } 415 416 static void 417 edgetdefaultlabel(ed, lp) 418 struct ed_softc *ed; 419 struct disklabel *lp; 420 { 421 ATADEBUG_PRINT(("edgetdefaultlabel\n"), DEBUG_FUNCS); 422 memset(lp, 0, sizeof(struct disklabel)); 423 424 lp->d_secsize = DEV_BSIZE; 425 lp->d_ntracks = ed->heads; 426 lp->d_nsectors = ed->sectors; 427 lp->d_ncylinders = ed->cyl; 428 lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors; 429 430 lp->d_type = DTYPE_ESDI; 431 432 strncpy(lp->d_typename, "ESDI", 16); 433 strncpy(lp->d_packname, "fictitious", 16); 434 lp->d_secperunit = ed->sc_capacity; 435 lp->d_rpm = 3600; 436 lp->d_interleave = 1; 437 lp->d_flags = 0; 438 439 lp->d_partitions[RAW_PART].p_offset = 0; 440 lp->d_partitions[RAW_PART].p_size = 441 lp->d_secperunit * (lp->d_secsize / DEV_BSIZE); 442 lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED; 443 lp->d_npartitions = RAW_PART + 1; 444 445 lp->d_magic = DISKMAGIC; 446 lp->d_magic2 = DISKMAGIC; 447 lp->d_checksum = dkcksum(lp); 448 } 449 450 /* 451 * Fabricate a default disk label, and try to read the correct one. 452 */ 453 static void 454 edgetdisklabel(dev, ed) 455 dev_t dev; 456 struct ed_softc *ed; 457 { 458 struct disklabel *lp = ed->sc_dk.dk_label; 459 const char *errstring; 460 461 ATADEBUG_PRINT(("edgetdisklabel\n"), DEBUG_FUNCS); 462 463 memset(ed->sc_dk.dk_cpulabel, 0, sizeof(struct cpu_disklabel)); 464 465 edgetdefaultlabel(ed, lp); 466 467 errstring = readdisklabel( 468 EDLABELDEV(dev), edmcastrategy, lp, ed->sc_dk.dk_cpulabel); 469 if (errstring) { 470 /* 471 * This probably happened because the drive's default 472 * geometry doesn't match the DOS geometry. We 473 * assume the DOS geometry is now in the label and try 474 * again. XXX This is a kluge. 475 */ 476 #if 0 477 if (wd->drvp->state > RECAL) 478 wd->drvp->drive_flags |= DRIVE_RESET; 479 #endif 480 errstring = readdisklabel(EDLABELDEV(dev), 481 edmcastrategy, lp, ed->sc_dk.dk_cpulabel); 482 } 483 if (errstring) { 484 printf("%s: %s\n", ed->sc_dev.dv_xname, errstring); 485 return; 486 } 487 } 488 489 int 490 edmcaioctl(dev, xfer, addr, flag, l) 491 dev_t dev; 492 u_long xfer; 493 caddr_t addr; 494 int flag; 495 struct lwp *l; 496 { 497 struct ed_softc *ed = device_lookup(&ed_cd, DISKUNIT(dev)); 498 int error; 499 500 ATADEBUG_PRINT(("edioctl\n"), DEBUG_FUNCS); 501 502 if ((ed->sc_flags & WDF_LOADED) == 0) 503 return EIO; 504 505 switch (xfer) { 506 case DIOCGDINFO: 507 *(struct disklabel *)addr = *(ed->sc_dk.dk_label); 508 return 0; 509 510 case DIOCGPART: 511 ((struct partinfo *)addr)->disklab = ed->sc_dk.dk_label; 512 ((struct partinfo *)addr)->part = 513 &ed->sc_dk.dk_label->d_partitions[DISKPART(dev)]; 514 return 0; 515 516 case DIOCWDINFO: 517 case DIOCSDINFO: 518 { 519 struct disklabel *lp; 520 521 lp = (struct disklabel *)addr; 522 523 if ((flag & FWRITE) == 0) 524 return EBADF; 525 526 if ((error = lockmgr(&ed->sc_dk.dk_openlock, LK_EXCLUSIVE, 527 NULL)) != 0) 528 return (error); 529 ed->sc_flags |= WDF_LABELLING; 530 531 error = setdisklabel(ed->sc_dk.dk_label, 532 lp, /*wd->sc_dk.dk_openmask : */0, 533 ed->sc_dk.dk_cpulabel); 534 if (error == 0) { 535 #if 0 536 if (wd->drvp->state > RECAL) 537 wd->drvp->drive_flags |= DRIVE_RESET; 538 #endif 539 if (xfer == DIOCWDINFO) 540 error = writedisklabel(EDLABELDEV(dev), 541 edmcastrategy, ed->sc_dk.dk_label, 542 ed->sc_dk.dk_cpulabel); 543 } 544 545 ed->sc_flags &= ~WDF_LABELLING; 546 (void) lockmgr(&ed->sc_dk.dk_openlock, LK_RELEASE, NULL); 547 return (error); 548 } 549 550 case DIOCKLABEL: 551 if (*(int *)addr) 552 ed->sc_flags |= WDF_KLABEL; 553 else 554 ed->sc_flags &= ~WDF_KLABEL; 555 return 0; 556 557 case DIOCWLABEL: 558 if ((flag & FWRITE) == 0) 559 return EBADF; 560 if (*(int *)addr) 561 ed->sc_flags |= WDF_WLABEL; 562 else 563 ed->sc_flags &= ~WDF_WLABEL; 564 return 0; 565 566 case DIOCGDEFLABEL: 567 edgetdefaultlabel(ed, (struct disklabel *)addr); 568 return 0; 569 570 #if 0 571 case DIOCWFORMAT: 572 if ((flag & FWRITE) == 0) 573 return EBADF; 574 { 575 register struct format_op *fop; 576 struct iovec aiov; 577 struct uio auio; 578 579 fop = (struct format_op *)addr; 580 aiov.iov_base = fop->df_buf; 581 aiov.iov_len = fop->df_count; 582 auio.uio_iov = &aiov; 583 auio.uio_iovcnt = 1; 584 auio.uio_resid = fop->df_count; 585 auio.uio_segflg = 0; 586 auio.uio_offset = 587 fop->df_startblk * wd->sc_dk.dk_label->d_secsize; 588 auio.uio_lwp = l; 589 error = physio(wdformat, NULL, dev, B_WRITE, minphys, 590 &auio); 591 fop->df_count -= auio.uio_resid; 592 fop->df_reg[0] = wdc->sc_status; 593 fop->df_reg[1] = wdc->sc_error; 594 return error; 595 } 596 #endif 597 598 case DIOCAWEDGE: 599 { 600 struct dkwedge_info *dkw = (void *) addr; 601 602 if ((flag & FWRITE) == 0) 603 return (EBADF); 604 605 /* If the ioctl happens here, the parent is us. */ 606 strcpy(dkw->dkw_parent, ed->sc_dev.dv_xname); 607 return (dkwedge_add(dkw)); 608 } 609 610 case DIOCDWEDGE: 611 { 612 struct dkwedge_info *dkw = (void *) addr; 613 614 if ((flag & FWRITE) == 0) 615 return (EBADF); 616 617 /* If the ioctl happens here, the parent is us. */ 618 strcpy(dkw->dkw_parent, ed->sc_dev.dv_xname); 619 return (dkwedge_del(dkw)); 620 } 621 622 case DIOCLWEDGES: 623 { 624 struct dkwedge_list *dkwl = (void *) addr; 625 626 return (dkwedge_list(&ed->sc_dk, dkwl, l)); 627 } 628 629 default: 630 return ENOTTY; 631 } 632 633 #ifdef DIAGNOSTIC 634 panic("edioctl: impossible"); 635 #endif 636 } 637 638 int 639 edmcasize(dev) 640 dev_t dev; 641 { 642 struct ed_softc *wd; 643 int part, omask; 644 int size; 645 646 ATADEBUG_PRINT(("edsize\n"), DEBUG_FUNCS); 647 648 wd = device_lookup(&ed_cd, DISKUNIT(dev)); 649 if (wd == NULL) 650 return (-1); 651 652 part = DISKPART(dev); 653 omask = wd->sc_dk.dk_openmask & (1 << part); 654 655 if (omask == 0 && edmcaopen(dev, 0, S_IFBLK, NULL) != 0) 656 return (-1); 657 if (wd->sc_dk.dk_label->d_partitions[part].p_fstype != FS_SWAP) 658 size = -1; 659 else 660 size = wd->sc_dk.dk_label->d_partitions[part].p_size * 661 (wd->sc_dk.dk_label->d_secsize / DEV_BSIZE); 662 if (omask == 0 && edmcaclose(dev, 0, S_IFBLK, NULL) != 0) 663 return (-1); 664 return (size); 665 } 666 667 /* #define WD_DUMP_NOT_TRUSTED if you just want to watch */ 668 static int eddoingadump = 0; 669 static int eddumprecalibrated = 0; 670 static int eddumpmulti = 1; 671 672 /* 673 * Dump core after a system crash. 674 */ 675 int 676 edmcadump(dev, blkno, va, size) 677 dev_t dev; 678 daddr_t blkno; 679 caddr_t va; 680 size_t size; 681 { 682 struct ed_softc *ed; /* disk unit to do the I/O */ 683 struct disklabel *lp; /* disk's disklabel */ 684 int part; 685 int nblks; /* total number of sectors left to write */ 686 int error; 687 688 /* Check if recursive dump; if so, punt. */ 689 if (eddoingadump) 690 return EFAULT; 691 eddoingadump = 1; 692 693 ed = device_lookup(&ed_cd, DISKUNIT(dev)); 694 if (ed == NULL) 695 return (ENXIO); 696 697 part = DISKPART(dev); 698 699 /* Make sure it was initialized. */ 700 if ((ed->sc_flags & EDF_INIT) == 0) 701 return ENXIO; 702 703 /* Convert to disk sectors. Request must be a multiple of size. */ 704 lp = ed->sc_dk.dk_label; 705 if ((size % lp->d_secsize) != 0) 706 return EFAULT; 707 nblks = size / lp->d_secsize; 708 blkno = blkno / (lp->d_secsize / DEV_BSIZE); 709 710 /* Check transfer bounds against partition size. */ 711 if ((blkno < 0) || ((blkno + nblks) > lp->d_partitions[part].p_size)) 712 return EINVAL; 713 714 /* Offset block number to start of partition. */ 715 blkno += lp->d_partitions[part].p_offset; 716 717 /* Recalibrate, if first dump transfer. */ 718 if (eddumprecalibrated == 0) { 719 eddumprecalibrated = 1; 720 eddumpmulti = 8; 721 #if 0 722 wd->drvp->state = RESET; 723 #endif 724 } 725 726 while (nblks > 0) { 727 error = edc_bio(ed->edc_softc, ed, va, blkno, 728 min(nblks, eddumpmulti) * lp->d_secsize, 0, 1); 729 if (error) 730 return (error); 731 732 /* update block count */ 733 nblks -= min(nblks, eddumpmulti); 734 blkno += min(nblks, eddumpmulti); 735 va += min(nblks, eddumpmulti) * lp->d_secsize; 736 } 737 738 eddoingadump = 0; 739 return (0); 740 } 741 742 static int 743 ed_get_params(ed, drv_flags) 744 struct ed_softc *ed; 745 int *drv_flags; 746 { 747 u_int16_t cmd_args[2]; 748 749 /* 750 * Get Device Configuration (09). 751 */ 752 cmd_args[0] = 14; /* Options: 00s110, s: 0=Physical 1=Pseudo */ 753 cmd_args[1] = 0; 754 if (edc_run_cmd(ed->edc_softc, CMD_GET_DEV_CONF, ed->sc_devno, 755 cmd_args, 2, 1)) 756 return (1); 757 758 ed->spares = ed->sense_data[1] >> 8; 759 if (drv_flags) 760 *drv_flags = ed->sense_data[1] & 0x1f; 761 ed->rba = ed->sense_data[2] | (ed->sense_data[3] << 16); 762 /* Instead of using: 763 ed->cyl = ed->sense_data[4]; 764 ed->heads = ed->sense_data[5] & 0xff; 765 ed->sectors = ed->sense_data[5] >> 8; 766 * we fabricate the numbers from RBA count, so that 767 * number of sectors is 32 and heads 64. This seems 768 * to be necessary for integrated ESDI controller. 769 */ 770 ed->sectors = 32; 771 ed->heads = 64; 772 ed->cyl = ed->rba / (ed->heads * ed->sectors); 773 ed->sc_capacity = ed->rba; 774 775 return (0); 776 } 777
Indexes created Mon Oct 13 05:10:05 GMT 2025