wd.c revision 1.54
1 /* 2 * Copyright (c) 1994 Charles Hannum. 3 * Copyright (c) 1990 The Regents of the University of California. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * William Jolitz. 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 University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * from: @(#)wd.c 7.2 (Berkeley) 5/9/91 38 * $Id: wd.c,v 1.54 1994/03/03 01:58:21 mycroft Exp $ 39 */ 40 41 #define QUIETWORKS /* define this to make wdopen() set DKFL_QUIET */ 42 #define INSTRUMENT /* instrumentation stuff by Brad Parker */ 43 44 /* TODO: peel out buffer at low ipl, speed improvement */ 45 /* TODO: find and fix the timing bugs apparent on some controllers */ 46 47 #include "wd.h" 48 #if NWDC > 0 49 50 #include <sys/param.h> 51 #include <sys/dkbad.h> 52 #include <sys/systm.h> 53 #include <sys/kernel.h> 54 #include <sys/conf.h> 55 #include <sys/file.h> 56 #include <sys/stat.h> 57 #include <sys/ioctl.h> 58 #include <sys/disklabel.h> 59 #include <sys/buf.h> 60 #include <sys/uio.h> 61 #include <sys/malloc.h> 62 #include <sys/syslog.h> 63 #ifdef INSTRUMENT 64 #include <sys/dkstat.h> 65 #endif 66 67 #include <vm/vm.h> 68 69 #include <machine/cpu.h> 70 #include <machine/cpufunc.h> 71 #include <machine/pio.h> 72 73 #include <i386/isa/isa.h> 74 #include <i386/isa/isa_device.h> 75 #include <i386/isa/icu.h> 76 #include <i386/isa/wdreg.h> 77 78 #define WDCNDELAY 100000 /* delay = 100us; so 10s for a controller state change */ 79 #define WDCDELAY 100 80 81 #if 0 82 /* if you enable this, it will report any delays more than 100us * N long */ 83 #define WDCNDELAY_DEBUG 100 84 #endif 85 86 #define WDIORETRIES 5 /* number of retries before giving up */ 87 88 #define WDUNIT(dev) ((minor(dev) & 0xf8) >> 3) 89 #define WDPART(dev) ((minor(dev) & 0x07) ) 90 #define makewddev(maj, unit, part) (makedev(maj, ((unit << 3) + part))) 91 #define WDRAW 3 /* 'd' partition isn't a partition! */ 92 93 #define b_cylin b_resid /* cylinder number for doing IO to */ 94 /* shares an entry in the buf struct */ 95 96 /* 97 * Drive states. Used to initialize drive. 98 */ 99 #define CLOSED 0 /* disk is closed. */ 100 #define WANTOPEN 1 /* open requested, not started */ 101 #define RECAL 2 /* doing restore */ 102 #define OPEN 3 /* done with open */ 103 104 /* 105 * Drive status. 106 */ 107 struct disk { 108 long dk_bc; /* byte count left */ 109 long dk_bct; /* total byte count left */ 110 short dk_skip; /* blocks already transferred */ 111 short dk_skipm; /* blocks already transferred for multi */ 112 char dk_ctrlr; /* physical controller number */ 113 char dk_unit; /* physical unit number */ 114 char dk_lunit; /* logical unit number */ 115 char dk_state; /* control state */ 116 u_char dk_status; /* copy of status reg. */ 117 u_char dk_error; /* copy of error reg. */ 118 short dk_port; /* i/o port base */ 119 120 u_long dk_copenpart; /* character units open on this drive */ 121 u_long dk_bopenpart; /* block units open on this drive */ 122 u_long dk_openpart; /* all units open on this drive */ 123 short dk_wlabel; /* label writable? */ 124 short dk_flags; /* drive characteistics found */ 125 #define DKFL_QUIET 0x00002 /* report errors back, but don't complain */ 126 #define DKFL_SINGLE 0x00004 /* sector at a time mode */ 127 #define DKFL_ERROR 0x00008 /* processing a disk error */ 128 #define DKFL_BSDLABEL 0x00010 /* has a BSD disk label */ 129 #define DKFL_BADSECT 0x00020 /* has a bad144 badsector table */ 130 #define DKFL_WRITEPROT 0x00040 /* manual unit write protect */ 131 struct wdparams dk_params; /* ESDI/IDE drive/controller parameters */ 132 struct disklabel dk_dd; /* device configuration data */ 133 struct cpu_disklabel dk_cpd; 134 long dk_badsect[127]; /* 126 plus trailing -1 marker */ 135 }; 136 137 struct board { 138 short dkc_port; 139 }; 140 141 struct board wdcontroller[NWDC]; 142 struct disk *wddrives[NWD]; /* table of units */ 143 struct buf wdtab[NWDC]; /* various per-controller info */ 144 struct buf wdutab[NWD]; /* head of queue per drive */ 145 struct buf rwdbuf[NWD]; /* buffers for raw IO */ 146 long wdxfer[NWD]; /* count of transfers */ 147 int wdtimeoutstatus[NWD]; /* timeout counters */ 148 149 int wdprobe(), wdattach(); 150 151 struct isa_driver wdcdriver = { 152 wdprobe, wdattach, "wdc", 153 }; 154 155 static void wdustart(struct disk *); 156 static void wdstart(int); 157 static int wdcommand(struct disk *, int); 158 static int wdcontrol(struct buf *); 159 static int wdsetctlr(dev_t, struct disk *); 160 static int wdgetctlr(int, struct disk *); 161 static void bad144intern(struct disk *); 162 static int wdreset(struct disk *, int); 163 static int wdtimeout(caddr_t); 164 void wddisksort(struct buf *dp, struct buf *bp); 165 int wdc_wait(struct disk *, int); 166 #define wait_for_drq(d) wdc_wait(d, WDCS_DRQ) 167 #define wait_for_ready(d) wdc_wait(d, WDCS_READY | WDCS_SEEKCMPLT) 168 #define wait_for_unbusy(d) wdc_wait(d, 0) 169 170 /* 171 * Probe for controller. 172 */ 173 int 174 wdprobe(struct isa_device *dvp) 175 { 176 struct disk *du; 177 int wdc; 178 179 if (dvp->id_unit >= NWDC) 180 return 0; 181 182 du = (struct disk *)malloc(sizeof(struct disk), M_TEMP, M_NOWAIT); 183 bzero(du, sizeof(struct disk)); 184 185 du->dk_ctrlr = dvp->id_unit; 186 du->dk_unit = 0; 187 du->dk_lunit = 0; 188 wdcontroller[dvp->id_unit].dkc_port = dvp->id_iobase; 189 190 wdc = du->dk_port = dvp->id_iobase; 191 192 /* check if we have registers that work */ 193 outb(wdc+wd_error, 0x5a); /* error register not writable */ 194 outb(wdc+wd_cyl_lo, 0xa5); /* but all of cyllo are implemented */ 195 if (inb(wdc+wd_error) == 0x5a || inb(wdc+wd_cyl_lo) != 0xa5) 196 goto nodevice; 197 198 wdreset(du, 0); 199 200 /* execute a controller only command */ 201 if (wdcommand(du, WDCC_DIAGNOSE) < 0) 202 goto nodevice; 203 204 free(du, M_TEMP); 205 return 8; 206 207 nodevice: 208 free(du, M_TEMP); 209 return 0; 210 } 211 212 /* 213 * Called for the controller too 214 * Attach each drive if possible. 215 */ 216 int 217 wdattach(struct isa_device *dvp) 218 { 219 int unit, lunit; 220 struct disk *du; 221 222 if (dvp->id_masunit == -1) 223 return 0; 224 if (dvp->id_masunit >= NWDC) 225 return 0; 226 227 lunit = dvp->id_unit; 228 if (lunit == -1) { 229 printf("wdc%d: cannot support unit ?\n", dvp->id_masunit); 230 return 0; 231 } 232 if (lunit >= NWD) 233 return 0; 234 unit = dvp->id_physid; 235 236 du = wddrives[lunit] = 237 (struct disk *)malloc(sizeof(struct disk), M_TEMP, M_NOWAIT); 238 bzero(du, sizeof(struct disk)); 239 bzero(&wdutab[lunit], sizeof(struct buf)); 240 bzero(&rwdbuf[lunit], sizeof(struct buf)); 241 wdxfer[lunit] = 0; 242 wdtimeoutstatus[lunit] = 0; 243 wdtimeout(lunit); 244 du->dk_ctrlr = dvp->id_masunit; 245 du->dk_unit = unit; 246 du->dk_lunit = lunit; 247 du->dk_port = wdcontroller[dvp->id_masunit].dkc_port; 248 249 if (wdgetctlr(unit, du) == 0) { 250 int i, blank; 251 252 printf("wd%d at wdc%d targ %d: ", dvp->id_unit, 253 dvp->id_masunit, dvp->id_physid); 254 if (du->dk_params.wdp_heads == 0) 255 printf("(unknown size) <"); 256 else 257 printf("%dMB %d cyl, %d head, %d sec <", 258 du->dk_dd.d_ncylinders * du->dk_dd.d_secpercyl / 259 (1048576 / DEV_BSIZE), 260 du->dk_dd.d_ncylinders, du->dk_dd.d_ntracks, 261 du->dk_dd.d_nsectors); 262 for (i = blank = 0; i < sizeof(du->dk_params.wdp_model); i++) { 263 char c = du->dk_params.wdp_model[i]; 264 if (!c) 265 break; 266 if (blank && c == ' ') 267 continue; 268 if (blank && c != ' ') { 269 printf(" %c", c); 270 blank = 0; 271 continue; 272 } 273 if (c == ' ') 274 blank = 1; 275 else 276 printf("%c", c); 277 } 278 printf(">\n"); 279 } else { 280 /*printf("wd%d at wdc%d slave %d -- error\n", lunit, 281 dvp->id_masunit, unit);*/ 282 wddrives[lunit] = 0; 283 free(du, M_TEMP); 284 return 0; 285 } 286 return 1; 287 } 288 289 /* Read/write routine for a buffer. Finds the proper unit, range checks 290 * arguments, and schedules the transfer. Does not wait for the transfer 291 * to complete. Multi-page transfers are supported. All I/O requests must 292 * be a multiple of a sector in length. 293 */ 294 int 295 wdstrategy(register struct buf *bp) 296 { 297 register struct buf *dp; 298 struct disk *du; /* Disk unit to do the IO. */ 299 int lunit = WDUNIT(bp->b_dev); 300 int s; 301 302 /* valid unit, controller, and request? */ 303 if (lunit >= NWD || bp->b_blkno < 0 || 304 howmany(bp->b_bcount, DEV_BSIZE) >= (1 << NBBY) || 305 (du = wddrives[lunit]) == 0) { 306 bp->b_error = EINVAL; 307 bp->b_flags |= B_ERROR; 308 goto done; 309 } 310 311 /* "soft" write protect check */ 312 if ((du->dk_flags & DKFL_WRITEPROT) && (bp->b_flags & B_READ) == 0) { 313 bp->b_error = EROFS; 314 bp->b_flags |= B_ERROR; 315 goto done; 316 } 317 318 /* have partitions and want to use them? */ 319 if ((du->dk_flags & DKFL_BSDLABEL) != 0 && WDPART(bp->b_dev) != WDRAW) { 320 /* 321 * do bounds checking, adjust transfer. if error, process. 322 * if end of partition, just return 323 */ 324 if (bounds_check_with_label(bp, &du->dk_dd, du->dk_wlabel) <= 0) 325 goto done; 326 /* otherwise, process transfer request */ 327 } 328 329 /* don't bother */ 330 bp->b_cylin = 0; 331 332 /* queue transfer on drive, activate drive and controller if idle */ 333 dp = &wdutab[lunit]; 334 s = splbio(); 335 wddisksort(dp, bp); 336 if (dp->b_active == 0) 337 wdustart(du); /* start drive */ 338 if (wdtab[du->dk_ctrlr].b_active == 0) 339 wdstart(du->dk_ctrlr); /* start controller */ 340 splx(s); 341 return 0; 342 343 done: 344 /* toss transfer, we're done early */ 345 biodone(bp); 346 } 347 348 /* 349 * Need to skip over multitransfer bufs. 350 */ 351 void 352 wddisksort(struct buf *dp, struct buf *bp) 353 { 354 register struct buf *ap; 355 356 while ((ap = dp->b_actf) && ap->b_flags & B_XXX) 357 dp = ap; 358 disksort(dp, bp); 359 } 360 361 /* 362 * Routine to queue a command to the controller. The unit's 363 * request is linked into the active list for the controller. 364 * If the controller is idle, the transfer is started. 365 */ 366 static void 367 wdustart(register struct disk *du) 368 { 369 register struct buf *dp = &wdutab[du->dk_lunit]; 370 int ctrlr = du->dk_ctrlr; 371 372 /* unit already active? */ 373 if (dp->b_active) 374 return; 375 376 /* anything to start? */ 377 if (dp->b_actf == NULL) 378 return; 379 380 /* link onto controller queue */ 381 dp->b_forw = NULL; 382 if (wdtab[ctrlr].b_forw == NULL) 383 wdtab[ctrlr].b_forw = dp; 384 else 385 wdtab[ctrlr].b_actl->b_forw = dp; 386 wdtab[ctrlr].b_actl = dp; 387 388 /* mark the drive unit as busy */ 389 dp->b_active = 1; 390 } 391 392 /* 393 * Controller startup routine. This does the calculation, and starts 394 * a single-sector read or write operation. Called to start a transfer, 395 * or from the interrupt routine to continue a multi-sector transfer. 396 * RESTRICTIONS: 397 * 1. The transfer length must be an exact multiple of the sector size. 398 */ 399 static void 400 wdstart(int ctrlr) 401 { 402 register struct disk *du; /* disk unit for IO */ 403 register struct buf *bp; 404 struct disklabel *lp; 405 struct buf *dp; 406 long blknum, cylin, head, sector; 407 long secpertrk, secpercyl, addr; 408 int lunit, wdc; 409 int xfrblknum; 410 411 loop: 412 /* is there a drive for the controller to do a transfer with? */ 413 dp = wdtab[ctrlr].b_forw; 414 if (dp == NULL) { 415 wdtab[ctrlr].b_active = 0; 416 return; 417 } 418 419 /* is there a transfer to this drive ? if so, link it on 420 the controller's queue */ 421 bp = dp->b_actf; 422 if (bp == NULL) { 423 dp->b_active = 0; 424 wdtab[ctrlr].b_forw = dp->b_forw; 425 goto loop; 426 } 427 428 /* obtain controller and drive information */ 429 lunit = WDUNIT(bp->b_dev); 430 du = wddrives[lunit]; 431 432 /* clear any pending timeout, just in case */ 433 wdtimeoutstatus[lunit] = 0; 434 435 /* if not really a transfer, do control operations specially */ 436 if (du->dk_state < OPEN) { 437 (void) wdcontrol(bp); 438 return; 439 } 440 441 /* calculate transfer details */ 442 blknum = bp->b_blkno + du->dk_skip; 443 #ifdef WDDEBUG 444 if (du->dk_skip == 0) 445 printf("\nwdstart %d: %s %d@%d; map ", lunit, 446 (bp->b_flags & B_READ) ? "read" : "write", bp->b_bcount, 447 blknum); 448 else 449 printf(" %d)%x", du->dk_skip, inb(du->dk_port+wd_altsts)); 450 #endif 451 addr = (int)bp->b_un.b_addr; 452 if (du->dk_skip == 0) 453 du->dk_bc = bp->b_bcount; 454 if (du->dk_skipm == 0) { 455 struct buf *oldbp, *nextbp; 456 oldbp = bp; 457 nextbp = bp->b_actf; 458 du->dk_bct = du->dk_bc; 459 oldbp->b_flags |= B_XXX; 460 while (nextbp && (oldbp->b_flags & DKFL_SINGLE) == 0 && 461 oldbp->b_dev == nextbp->b_dev && nextbp->b_blkno == 462 (oldbp->b_blkno + (oldbp->b_bcount / DEV_BSIZE)) && 463 (oldbp->b_flags & B_READ) == (nextbp->b_flags & B_READ)) { 464 if ((du->dk_bct + nextbp->b_bcount) / DEV_BSIZE >= 240) 465 break; 466 du->dk_bct += nextbp->b_bcount; 467 nextbp->b_flags |= B_XXX; 468 oldbp = nextbp; 469 nextbp = nextbp->b_actf; 470 } 471 } 472 473 lp = &du->dk_dd; 474 secpertrk = lp->d_nsectors; 475 secpercyl = lp->d_secpercyl; 476 if ((du->dk_flags & DKFL_BSDLABEL) != 0 && WDPART(bp->b_dev) != WDRAW) 477 blknum += lp->d_partitions[WDPART(bp->b_dev)].p_offset; 478 cylin = blknum / secpercyl; 479 head = (blknum % secpercyl) / secpertrk; 480 sector = blknum % secpertrk; 481 482 /* Check for bad sectors if we have them, and not formatting */ 483 /* Only do this in single-sector mode, or when starting a */ 484 /* multiple-sector transfer. */ 485 if ((du->dk_flags & DKFL_BADSECT) && 486 #ifdef B_FORMAT 487 (bp->b_flags & B_FORMAT) == 0 && 488 #endif 489 (du->dk_skipm == 0 || (du->dk_flags & DKFL_SINGLE))) { 490 491 long blkchk, blkend, blknew; 492 int i; 493 494 blkend = blknum + howmany(du->dk_bct, DEV_BSIZE) - 1; 495 for (i = 0; (blkchk = du->dk_badsect[i]) != -1; i++) { 496 if (blkchk > blkend) 497 break; /* transfer is completely OK; done */ 498 if (blkchk == blknum) { 499 blknew = 500 lp->d_secperunit - lp->d_nsectors - i - 1; 501 cylin = blknew / secpercyl; 502 head = (blknew % secpercyl) / secpertrk; 503 sector = blknew % secpertrk; 504 du->dk_flags |= DKFL_SINGLE; 505 /* found and replaced first blk of transfer; done */ 506 break; 507 } else if (blkchk > blknum) { 508 du->dk_flags |= DKFL_SINGLE; 509 break; /* bad block inside transfer; done */ 510 } 511 } 512 } 513 if (du->dk_flags & DKFL_SINGLE) { 514 du->dk_bct = du->dk_bc; 515 du->dk_skipm = du->dk_skip; 516 } 517 518 #ifdef WDDEBUG 519 printf("c%d h%d s%d ", cylin, head, sector); 520 #endif 521 522 sector++; /* sectors begin with 1, not 0 */ 523 524 wdtab[ctrlr].b_active = 1; /* mark controller active */ 525 wdc = du->dk_port; 526 527 #ifdef INSTRUMENT 528 /* instrumentation */ 529 if (du->dk_unit >= 0 && du->dk_skip == 0) { 530 dk_busy |= 1 << du->dk_lunit; 531 dk_wds[du->dk_lunit] += bp->b_bcount >> 6; 532 } 533 if (du->dk_unit >= 0 && du->dk_skipm == 0) { 534 ++dk_seek[du->dk_lunit]; 535 ++dk_xfer[du->dk_lunit]; 536 } 537 #endif 538 539 retry: 540 /* if starting a multisector transfer, or doing single transfers */ 541 if (du->dk_skipm == 0 || (du->dk_flags & DKFL_SINGLE)) { 542 int command; 543 544 if (wdtab[ctrlr].b_errcnt && (bp->b_flags & B_READ) == 0) { 545 du->dk_bc += DEV_BSIZE; 546 du->dk_bct += DEV_BSIZE; 547 } 548 549 /* controller idle? */ 550 if (wait_for_unbusy(du) < 0) { 551 wdreset(du, 1); 552 goto retry; 553 } 554 555 /* stuff the task file */ 556 outb(wdc+wd_precomp, lp->d_precompcyl / 4); 557 #ifdef B_FORMAT 558 if (bp->b_flags & B_FORMAT) { 559 outb(wdc+wd_sector, lp->d_gap3); 560 outb(wdc+wd_seccnt, lp->d_nsectors); 561 } else { 562 if (du->dk_flags & DKFL_SINGLE) 563 outb(wdc+wd_seccnt, 1); 564 else 565 outb(wdc+wd_seccnt, 566 howmany(du->dk_bct, DEV_BSIZE)); 567 outb(wdc+wd_sector, sector); 568 } 569 #else 570 if (du->dk_flags & DKFL_SINGLE) 571 outb(wdc+wd_seccnt, 1); 572 else 573 outb(wdc+wd_seccnt, howmany(du->dk_bct, DEV_BSIZE)); 574 outb(wdc+wd_sector, sector); 575 #endif 576 outb(wdc+wd_cyl_lo, cylin); 577 outb(wdc+wd_cyl_hi, cylin >> 8); 578 579 /* set up the SDH register (select drive) */ 580 outb(wdc+wd_sdh, WDSD_IBM | (du->dk_unit<<4) | (head & 0xf)); 581 /* wait for drive to become ready */ 582 if (wait_for_ready(du) < 0) { 583 wdreset(du, 1); 584 goto retry; 585 } 586 587 /* initiate command! */ 588 #ifdef B_FORMAT 589 if (bp->b_flags & B_FORMAT) 590 command = WDCC_FORMAT; 591 else 592 command = 593 (bp->b_flags & B_READ) ? WDCC_READ : WDCC_WRITE; 594 #else 595 command = (bp->b_flags & B_READ) ? WDCC_READ : WDCC_WRITE; 596 #endif 597 if (wdcommand(du, command) < 0) { 598 wdreset(du, 1); 599 goto retry; 600 } 601 #ifdef WDDEBUG 602 printf("sector %d cylin %d head %d addr %x sts %x\n", sector, 603 cylin, head, addr, inb(wdc+wd_altsts)); 604 #endif 605 } 606 607 /* if this is a read operation, just go away until it's done. */ 608 if (bp->b_flags & B_READ) { 609 wdtimeoutstatus[lunit] = 2; 610 return; 611 } 612 613 if (wait_for_drq(du) < 0) { 614 wdreset(du, 1); 615 goto retry; 616 } 617 /* then send it! */ 618 outsw(wdc+wd_data, addr + du->dk_skip * DEV_BSIZE, 619 DEV_BSIZE / sizeof(short)); 620 621 du->dk_bc -= DEV_BSIZE; 622 du->dk_bct -= DEV_BSIZE; 623 624 wdtimeoutstatus[lunit] = 2; 625 } 626 627 /* Interrupt routine for the controller. Acknowledge the interrupt, check for 628 * errors on the current operation, mark it done if necessary, and start 629 * the next request. Also check for a partially done transfer, and 630 * continue with the next chunk if so. 631 */ 632 void 633 wdintr(int ctrlr) 634 { 635 register struct disk *du; 636 register struct buf *bp, *dp; 637 int stat, wdc; 638 639 if (!wdtab[ctrlr].b_active) { 640 printf("wdc%d: extra interrupt\n", ctrlr); 641 return; 642 } 643 644 dp = wdtab[ctrlr].b_forw; 645 bp = dp->b_actf; 646 du = wddrives[WDUNIT(bp->b_dev)]; 647 wdc = du->dk_port; 648 wdtimeoutstatus[WDUNIT(bp->b_dev)] = 0; 649 650 #ifdef WDDEBUG 651 printf("I%d ", ctrlr); 652 #endif 653 654 stat = wait_for_unbusy(du); 655 if (stat < 0) { 656 printf("wdc%d: timeout waiting for unbusy\n", ctrlr); 657 goto lose; 658 } 659 660 /* is it not a transfer, but a control operation? */ 661 if (du->dk_state < OPEN) { 662 wdtab[ctrlr].b_active = 0; 663 if (wdcontrol(bp)) 664 wdstart(ctrlr); 665 return; 666 } 667 668 /* have we an error? */ 669 if (stat & (WDCS_ERR | WDCS_ECCCOR)) { 670 lose: 671 du->dk_status = stat; 672 du->dk_error = inb(wdc+wd_error); 673 #ifdef WDDEBUG 674 printf("stat %x error %x\n", stat, du->dk_error); 675 #endif 676 if ((du->dk_flags & DKFL_SINGLE) == 0) { 677 du->dk_flags |= DKFL_ERROR; 678 goto outt; 679 } 680 #ifdef B_FORMAT 681 if (bp->b_flags & B_FORMAT) { 682 bp->b_error = EIO; 683 bp->b_flags |= B_ERROR; 684 goto done; 685 } 686 #endif 687 688 /* error or error correction? */ 689 if (stat & WDCS_ERR) { 690 if (++wdtab[ctrlr].b_errcnt < WDIORETRIES) 691 wdtab[ctrlr].b_active = 0; 692 else { 693 if ((du->dk_flags & DKFL_QUIET) == 0) { 694 diskerr(bp, "wd", "hard error", 695 LOG_PRINTF, du->dk_skip, 696 &du->dk_dd); 697 #ifdef WDDEBUG 698 printf("stat %b error %b\n", stat, 699 WDCS_BITS, inb(wdc+wd_error), 700 WDERR_BITS); 701 #endif 702 } 703 bp->b_error = EIO; 704 bp->b_flags |= B_ERROR; /* flag the error */ 705 } 706 } else if ((du->dk_flags & DKFL_QUIET) == 0) 707 diskerr(bp, "wd", "soft ecc", 0, du->dk_skip, 708 &du->dk_dd); 709 } 710 711 /* 712 * If this was a successful read operation, fetch the data. 713 */ 714 if (((bp->b_flags & (B_READ | B_ERROR)) == B_READ) && 715 wdtab[ctrlr].b_active) { 716 int chk; 717 718 chk = min(DEV_BSIZE / sizeof(short), du->dk_bc / sizeof(short)); 719 720 /* ready to receive data? */ 721 if (wait_for_drq(du) < 0) { 722 printf("wdc%d: timeout waiting for drq\n", ctrlr); 723 goto lose; 724 } 725 726 /* suck in data */ 727 insw(wdc+wd_data, 728 (int)bp->b_un.b_addr + du->dk_skip * DEV_BSIZE, chk); 729 du->dk_bc -= chk * sizeof(short); 730 du->dk_bct -= chk * sizeof(short); 731 732 /* for obselete fractional sector reads */ 733 while (chk++ < (DEV_BSIZE / sizeof(short))) 734 (void) inw(wdc+wd_data); 735 } 736 737 wdxfer[du->dk_lunit]++; 738 outt: 739 if (wdtab[ctrlr].b_active) { 740 #ifdef INSTRUMENT 741 if (du->dk_unit >= 0) 742 dk_busy &= ~(1 << du->dk_unit); 743 #endif 744 if ((bp->b_flags & B_ERROR) == 0) { 745 du->dk_skip++; /* Add to succ. sect */ 746 du->dk_skipm++; /* Add to succ. sect for multitransfer */ 747 if (wdtab[ctrlr].b_errcnt && 748 (du->dk_flags & DKFL_QUIET) == 0) 749 diskerr(bp, "wd", "soft error", 0, du->dk_skip, 750 &du->dk_dd); 751 wdtab[ctrlr].b_errcnt = 0; 752 753 /* see if more to transfer */ 754 if (du->dk_bc > 0 && (du->dk_flags & DKFL_ERROR) == 0) { 755 wdtab[ctrlr].b_active = 0; 756 wdstart(ctrlr); 757 return; /* next chunk is started */ 758 } else if ((du->dk_flags & (DKFL_SINGLE | DKFL_ERROR)) == DKFL_ERROR) { 759 du->dk_skip = 0; 760 du->dk_skipm = 0; 761 du->dk_flags &= ~DKFL_ERROR; 762 du->dk_flags |= DKFL_SINGLE; 763 wdtab[ctrlr].b_active = 0; 764 wdstart(ctrlr); 765 return; /* redo xfer sector by sector */ 766 } 767 } 768 769 done: 770 /* done with this transfer, with or without error */ 771 du->dk_flags &= ~DKFL_SINGLE; 772 wdtab[ctrlr].b_errcnt = 0; 773 if (du->dk_bct == 0) { 774 wdtab[ctrlr].b_forw = dp->b_forw; 775 du->dk_skipm = 0; 776 dp->b_active = 0; 777 } 778 bp->b_resid = bp->b_bcount - du->dk_skip * DEV_BSIZE; 779 bp->b_flags &= ~B_XXX; 780 du->dk_skip = 0; 781 dp->b_actf = bp->b_actf; 782 dp->b_errcnt = 0; 783 biodone(bp); 784 } 785 786 /* controller now idle */ 787 wdtab[ctrlr].b_active = 0; 788 789 /* anything more on drive queue? */ 790 if (dp->b_actf && du->dk_bct == 0) 791 wdustart(du); 792 793 /* anything more for controller to do? */ 794 if (wdtab[ctrlr].b_forw) 795 wdstart(ctrlr); 796 } 797 798 /* 799 * Initialize a drive. 800 */ 801 int 802 wdopen(dev_t dev, int flags, int fmt, struct proc *p) 803 { 804 int lunit; 805 struct disk *du; 806 int part = WDPART(dev), mask = 1 << part; 807 struct partition *pp; 808 char *msg; 809 810 lunit = WDUNIT(dev); 811 if (lunit >= NWD) 812 return ENXIO; 813 du = wddrives[lunit]; 814 if (du == 0) 815 return ENXIO; 816 817 #ifdef QUIETWORKS 818 if (part == WDRAW) 819 du->dk_flags |= DKFL_QUIET; 820 else 821 du->dk_flags &= ~DKFL_QUIET; 822 #else 823 du->dk_flags &= ~DKFL_QUIET; 824 #endif 825 826 if ((du->dk_flags & DKFL_BSDLABEL) == 0) { 827 du->dk_flags |= DKFL_WRITEPROT; 828 wdutab[lunit].b_actf = NULL; 829 830 /* 831 * Use the default sizes until we've read the label, 832 * or longer if there isn't one there. 833 */ 834 bzero(&du->dk_dd, sizeof(du->dk_dd)); 835 du->dk_dd.d_type = DTYPE_ST506; 836 du->dk_dd.d_ncylinders = 1024; 837 du->dk_dd.d_secsize = DEV_BSIZE; 838 du->dk_dd.d_ntracks = 8; 839 du->dk_dd.d_nsectors = 17; 840 du->dk_dd.d_secpercyl = 17*8; 841 du->dk_dd.d_secperunit = 17*8*1024; 842 du->dk_state = WANTOPEN; 843 844 /* read label using "raw" partition */ 845 #if defined(TIHMODS) && defined(garbage) 846 /* wdsetctlr(dev, du); */ /* Maybe do this TIH */ 847 msg = readdisklabel(makewddev(major(dev), WDUNIT(dev), WDRAW), 848 wdstrategy, &du->dk_dd, &du->dk_cpd); 849 wdsetctlr(dev, du); 850 #endif 851 if (msg = readdisklabel(makewddev(major(dev), WDUNIT(dev), 852 WDRAW), wdstrategy, &du->dk_dd, &du->dk_cpd)) { 853 if ((du->dk_flags & DKFL_QUIET) == 0) { 854 log(LOG_WARNING, 855 "wd%d: cannot find label (%s)\n", 856 lunit, msg); 857 return EINVAL; /* XXX needs translation */ 858 } 859 } else { 860 wdsetctlr(dev, du); 861 du->dk_flags |= DKFL_BSDLABEL; 862 du->dk_flags &= ~DKFL_WRITEPROT; 863 if (du->dk_dd.d_flags & D_BADSECT) 864 du->dk_flags |= DKFL_BADSECT; 865 } 866 } 867 868 if (du->dk_flags & DKFL_BADSECT) 869 bad144intern(du); 870 871 /* 872 * Warn if a partion is opened 873 * that overlaps another partition which is open 874 * unless one is the "raw" partition (whole disk). 875 */ 876 if ((du->dk_openpart & mask) == 0 && part != WDRAW) { 877 int start, end; 878 879 pp = &du->dk_dd.d_partitions[part]; 880 start = pp->p_offset; 881 end = pp->p_offset + pp->p_size; 882 for (pp = du->dk_dd.d_partitions; 883 pp < &du->dk_dd.d_partitions[du->dk_dd.d_npartitions]; 884 pp++) { 885 if (pp->p_offset + pp->p_size <= start || 886 pp->p_offset >= end) 887 continue; 888 if (pp - du->dk_dd.d_partitions == WDRAW) 889 continue; 890 if (du->dk_openpart & (1 << (pp - du->dk_dd.d_partitions))) 891 log(LOG_WARNING, 892 "wd%d%c: overlaps open partition (%c)\n", 893 lunit, part + 'a', 894 pp - du->dk_dd.d_partitions + 'a'); 895 } 896 } 897 if (part >= du->dk_dd.d_npartitions && part != WDRAW) 898 return ENXIO; 899 900 /* insure only one open at a time */ 901 du->dk_openpart |= mask; 902 switch (fmt) { 903 case S_IFCHR: 904 du->dk_copenpart |= mask; 905 break; 906 case S_IFBLK: 907 du->dk_bopenpart |= mask; 908 break; 909 } 910 return 0; 911 } 912 913 /* 914 * Implement operations other than read/write. 915 * Called from wdstart or wdintr during opens and formats. 916 * Uses finite-state-machine to track progress of operation in progress. 917 * Returns 0 if operation still in progress, 1 if completed. 918 */ 919 static int 920 wdcontrol(register struct buf *bp) 921 { 922 struct disk *du; 923 int unit, lunit; 924 int stat; 925 int s, ctrlr; 926 int wdc; 927 928 du = wddrives[WDUNIT(bp->b_dev)]; 929 ctrlr = du->dk_ctrlr; 930 unit = du->dk_unit; 931 lunit = du->dk_lunit; 932 wdc = du->dk_port; 933 934 switch (du->dk_state) { 935 case WANTOPEN: /* set SDH, step rate, do restore */ 936 tryagainrecal: 937 #ifdef WDDEBUG 938 printf("wd%d: recal ", lunit); 939 #endif 940 s = splbio(); /* not called from intr level ... */ 941 wdgetctlr(unit, du); 942 943 if (wait_for_unbusy(du) < 0) { 944 wdreset(du, 1); 945 goto tryagainrecal; 946 } 947 948 outb(wdc+wd_sdh, WDSD_IBM | (unit << 4)); 949 if (wait_for_ready(du) < 0) { 950 wdreset(du, 1); 951 goto tryagainrecal; 952 } 953 954 wdtab[ctrlr].b_active = 1; 955 if (wdcommand(du, WDCC_RESTORE | WD_STEP) < 0) { 956 wdreset(du, 1); 957 goto tryagainrecal; 958 } 959 du->dk_state = RECAL; 960 splx(s); 961 return 0; 962 case RECAL: 963 if ((stat = inb(wdc+wd_altsts)) & WDCS_ERR) { 964 if ((du->dk_flags & DKFL_QUIET) == 0) { 965 printf("wd%d: recal", du->dk_lunit); 966 printf(": status %b error %b\n", stat, 967 WDCS_BITS, inb(wdc+wd_error), WDERR_BITS); 968 } 969 if (++wdtab[ctrlr].b_errcnt < WDIORETRIES) 970 goto tryagainrecal; 971 bp->b_error = ENXIO; /* XXX needs translation */ 972 goto badopen; 973 } 974 975 /* some controllers require this ... */ 976 wdsetctlr(bp->b_dev, du); 977 978 wdtab[ctrlr].b_errcnt = 0; 979 du->dk_state = OPEN; 980 /* 981 * The rest of the initialization can be done 982 * by normal means. 983 */ 984 return 1; 985 default: 986 panic("wdcontrol"); 987 } 988 /* NOTREACHED */ 989 990 badopen: 991 if ((du->dk_flags & DKFL_QUIET) == 0) 992 printf(": status %b error %b\n", stat, WDCS_BITS, 993 inb(wdc+wd_error), WDERR_BITS); 994 bp->b_flags |= B_ERROR; 995 return 1; 996 } 997 998 /* 999 * send a command and wait uninterruptibly until controller is finished. 1000 * return -1 if controller busy for too long, otherwise 1001 * return status. intended for brief controller commands at critical points. 1002 * assumes interrupts are blocked. 1003 */ 1004 static int 1005 wdcommand(struct disk *du, int cmd) 1006 { 1007 int stat, wdc; 1008 1009 wdc = du->dk_port; 1010 1011 /* controller ready for command? */ 1012 if (wait_for_unbusy(du) < 0) 1013 return -1; 1014 1015 /* send command, await results */ 1016 outb(wdc+wd_command, cmd); 1017 1018 switch (cmd) { 1019 default: 1020 #if 0 1021 case WDCC_FORMAT: 1022 case WDCC_RESTORE | WD_STEP: 1023 #endif 1024 return wait_for_unbusy(du); 1025 case WDCC_READ: 1026 case WDCC_WRITE: 1027 return 0; 1028 case WDCC_IDC: 1029 case WDCC_DIAGNOSE: 1030 return wdc_wait(du, WDCS_READY); 1031 case WDCC_READP: 1032 return wait_for_drq(du); 1033 } 1034 } 1035 1036 /* 1037 * issue IDC to drive to tell it just what geometry it is to be. 1038 */ 1039 static int 1040 wdsetctlr(dev_t dev, struct disk *du) 1041 { 1042 int stat, s, wdc; 1043 1044 #ifdef WDDEBUG 1045 printf("wd(%d,%d) C%dH%dS%d\n", du->dk_ctrlr, du->dk_unit, 1046 du->dk_dd.d_ncylinders, du->dk_dd.d_ntracks, du->dk_dd.d_nsectors); 1047 #endif 1048 1049 wdc = du->dk_port; 1050 1051 s = splbio(); 1052 if (wait_for_unbusy(du) < 0) 1053 return -1; 1054 outb(wdc+wd_cyl_lo, du->dk_dd.d_ncylinders); /* TIH: was ...ders+1 */ 1055 outb(wdc+wd_cyl_hi, du->dk_dd.d_ncylinders>>8); /* TIH: was ...ders+1 */ 1056 outb(wdc+wd_sdh, 1057 WDSD_IBM | (du->dk_unit << 4) + du->dk_dd.d_ntracks - 1); 1058 outb(wdc+wd_seccnt, du->dk_dd.d_nsectors); 1059 if (wait_for_ready(du) < 0) 1060 return -1; 1061 stat = wdcommand(du, WDCC_IDC); 1062 if (stat < 0 || stat & WDCS_ERR) 1063 printf("wdsetctlr: stat %b error %b\n", stat, WDCS_BITS, 1064 inb(wdc+wd_error), WDERR_BITS); 1065 splx(s); 1066 return stat; 1067 } 1068 1069 /* 1070 * issue READP to drive to ask it what it is. 1071 */ 1072 static int 1073 wdgetctlr(int u, struct disk *du) 1074 { 1075 int stat, s, i, wdc; 1076 char tb[DEV_BSIZE]; 1077 struct wdparams *wp; 1078 1079 s = splbio(); /* not called from intr level ... */ 1080 wdc = du->dk_port; 1081 if (wait_for_unbusy(du) < 0) { 1082 splx(s); 1083 return -1; 1084 } 1085 1086 outb(wdc+wd_sdh, WDSD_IBM | (u << 4)); 1087 if (wait_for_ready(du) < 0) { 1088 splx(s); 1089 return -1; 1090 } 1091 1092 stat = wdcommand(du, WDCC_READP); 1093 if (stat < 0) { 1094 splx(s); 1095 return -1; 1096 } 1097 1098 if ((stat & WDCS_ERR) == 0) { 1099 /* obtain parameters */ 1100 wp = &du->dk_params; 1101 insw(wdc+wd_data, tb, sizeof(tb)/sizeof(short)); 1102 bcopy(tb, wp, sizeof(struct wdparams)); 1103 1104 /* shuffle string byte order */ 1105 for (i = 0; i < sizeof(wp->wdp_model); i += 2) { 1106 u_short *p; 1107 p = (u_short *)(wp->wdp_model + i); 1108 *p = ntohs(*p); 1109 } 1110 1111 strncpy(du->dk_dd.d_typename, "ESDI/IDE", 1112 sizeof du->dk_dd.d_typename); 1113 du->dk_dd.d_type = DTYPE_ESDI; 1114 bcopy(wp->wdp_model+20, du->dk_dd.d_packname, 14-1); 1115 1116 /* update disklabel given drive information */ 1117 du->dk_dd.d_ncylinders = 1118 wp->wdp_fixedcyl + wp->wdp_removcyl /*+- 1*/; 1119 du->dk_dd.d_ntracks = wp->wdp_heads; 1120 du->dk_dd.d_nsectors = wp->wdp_sectors; 1121 du->dk_dd.d_secpercyl = 1122 du->dk_dd.d_ntracks * du->dk_dd.d_nsectors; 1123 du->dk_dd.d_partitions[1].p_size = 1124 du->dk_dd.d_secpercyl * wp->wdp_sectors; 1125 du->dk_dd.d_partitions[1].p_offset = 0; 1126 } else { 1127 /* 1128 * If WDCC_READP fails then we might have an old drive 1129 * so we try a seek to 0; if that passes then the 1130 * drive is there but it's OLD AND KRUSTY. 1131 */ 1132 stat = wdcommand(du, WDCC_RESTORE | WD_STEP); 1133 if (stat < 0 || stat & WDCS_ERR) { 1134 splx(s); 1135 return inb(wdc+wd_error); 1136 } 1137 1138 strncpy(du->dk_dd.d_typename, "ST506", 1139 sizeof du->dk_dd.d_typename); 1140 strncpy(du->dk_params.wdp_model, "Unknown Type", 1141 sizeof du->dk_params.wdp_model); 1142 du->dk_dd.d_type = DTYPE_ST506; 1143 } 1144 1145 #if 0 1146 printf("gc %x cyl %d trk %d sec %d type %d sz %d model %s\n", 1147 wp->wdp_config, wp->wdp_fixedcyl + wp->wdp_removcyl, wp->wdp_heads, 1148 wp->wdp_sectors, wp->wdp_cntype, wp->wdp_cnsbsz, wp->wdp_model); 1149 #endif 1150 1151 /* better ... */ 1152 du->dk_dd.d_subtype |= DSTYPE_GEOMETRY; 1153 1154 /* XXX sometimes possibly needed */ 1155 (void) inb(wdc+wd_status); 1156 splx(s); 1157 return 0; 1158 } 1159 1160 1161 /* ARGSUSED */ 1162 int 1163 wdclose(dev_t dev, int flags, int fmt) 1164 { 1165 struct disk *du; 1166 int part = WDPART(dev), mask = 1 << part; 1167 1168 du = wddrives[WDUNIT(dev)]; 1169 1170 /* insure only one open at a time */ 1171 du->dk_openpart &= ~mask; 1172 switch (fmt) { 1173 case S_IFCHR: 1174 du->dk_copenpart &= ~mask; 1175 break; 1176 case S_IFBLK: 1177 du->dk_bopenpart &= ~mask; 1178 break; 1179 } 1180 return 0; 1181 } 1182 1183 int 1184 wdioctl(dev_t dev, int cmd, caddr_t addr, int flag, struct proc *p) 1185 { 1186 int lunit = WDUNIT(dev); 1187 struct disk *du = wddrives[lunit]; 1188 int error; 1189 1190 switch (cmd) { 1191 case DIOCSBAD: 1192 if ((flag & FWRITE) == 0) 1193 return EBADF; 1194 du->dk_cpd.bad = *(struct dkbad *)addr; 1195 bad144intern(du); 1196 return 0; 1197 1198 case DIOCGDINFO: 1199 *(struct disklabel *)addr = du->dk_dd; 1200 return 0; 1201 1202 case DIOCGPART: 1203 ((struct partinfo *)addr)->disklab = &du->dk_dd; 1204 ((struct partinfo *)addr)->part = 1205 &du->dk_dd.d_partitions[WDPART(dev)]; 1206 return 0; 1207 1208 case DIOCSDINFO: 1209 if ((flag & FWRITE) == 0) 1210 return EBADF; 1211 error = setdisklabel(&du->dk_dd, 1212 (struct disklabel *)addr, 1213 /*(du->dk_flags & DKFL_BSDLABEL) ? du->dk_openpart : */0, 1214 &du->dk_cpd); 1215 if (error == 0) { 1216 du->dk_flags |= DKFL_BSDLABEL; 1217 wdsetctlr(dev, du); 1218 } 1219 return error; 1220 1221 case DIOCWLABEL: 1222 du->dk_flags &= ~DKFL_WRITEPROT; 1223 if ((flag & FWRITE) == 0) 1224 return EBADF; 1225 du->dk_wlabel = *(int *)addr; 1226 return 0; 1227 1228 case DIOCWDINFO: 1229 du->dk_flags &= ~DKFL_WRITEPROT; 1230 if ((flag & FWRITE) == 0) 1231 return EBADF; 1232 error = setdisklabel(&du->dk_dd, 1233 (struct disklabel *)addr, 1234 /*(du->dk_flags & DKFL_BSDLABEL) ? du->dk_openpart :*/0, 1235 &du->dk_cpd); 1236 if (error == 0) { 1237 int wlab; 1238 1239 du->dk_flags |= DKFL_BSDLABEL; 1240 wdsetctlr(dev, du); 1241 1242 /* simulate opening partition 0 so write succeeds */ 1243 du->dk_openpart |= (1 << 0); /* XXX */ 1244 wlab = du->dk_wlabel; 1245 du->dk_wlabel = 1; 1246 error = writedisklabel(dev, wdstrategy, &du->dk_dd, &du->dk_cpd); 1247 du->dk_openpart = du->dk_copenpart | du->dk_bopenpart; 1248 du->dk_wlabel = wlab; 1249 } 1250 return error; 1251 1252 #ifdef notyet 1253 case DIOCGDINFOP: 1254 *(struct disklabel **)addr = &du->dk_dd; 1255 return 0; 1256 1257 case DIOCWFORMAT: 1258 if ((flag & FWRITE) == 0) 1259 return EBADF; 1260 { 1261 register struct format_op *fop; 1262 struct iovec aiov; 1263 struct uio auio; 1264 1265 fop = (struct format_op *)addr; 1266 aiov.iov_base = fop->df_buf; 1267 aiov.iov_len = fop->df_count; 1268 auio.uio_iov = &aiov; 1269 auio.uio_iovcnt = 1; 1270 auio.uio_resid = fop->df_count; 1271 auio.uio_segflg = 0; 1272 auio.uio_offset = 1273 fop->df_startblk * du->dk_dd.d_secsize; 1274 error = physio(wdformat, &rwdbuf[lunit], dev, B_WRITE, 1275 minphys, &auio); 1276 fop->df_count -= auio.uio_resid; 1277 fop->df_reg[0] = du->dk_status; 1278 fop->df_reg[1] = du->dk_error; 1279 return error; 1280 } 1281 #endif 1282 1283 default: 1284 return ENOTTY; 1285 } 1286 1287 #ifdef DIAGNOSTIC 1288 panic("wdioctl: impossible"); 1289 #endif 1290 } 1291 1292 #ifdef B_FORMAT 1293 int 1294 wdformat(struct buf *bp) 1295 { 1296 1297 bp->b_flags |= B_FORMAT; 1298 return wdstrategy(bp); 1299 } 1300 #endif 1301 1302 int 1303 wdsize(dev_t dev) 1304 { 1305 int lunit = WDUNIT(dev), part = WDPART(dev); 1306 struct disk *du; 1307 1308 if (lunit >= NWD) 1309 return -1; 1310 du = wddrives[lunit]; 1311 if (du == 0) 1312 return -1; 1313 1314 if (du->dk_state < OPEN || (du->dk_flags & DKFL_BSDLABEL) == 0) { 1315 int val; 1316 val = wdopen(makewddev(major(dev), lunit, WDRAW), FREAD, 1317 S_IFBLK, 0); 1318 if (val != 0) 1319 return -1; 1320 } 1321 1322 if ((du->dk_flags & (DKFL_WRITEPROT | DKFL_BSDLABEL)) != DKFL_BSDLABEL) 1323 return -1; 1324 1325 return (int)du->dk_dd.d_partitions[part].p_size; 1326 } 1327 1328 extern char *vmmap; /* poor name! */ 1329 1330 /* dump core after a system crash */ 1331 int 1332 wddump(dev_t dev) 1333 { 1334 register struct disk *du; /* disk unit to do the IO */ 1335 long num; /* number of sectors to write */ 1336 int ctrlr, lunit, part, wdc; 1337 long blkoff, blknum; 1338 long cylin, head, sector, stat; 1339 long secpertrk, secpercyl, nblocks, i; 1340 char *addr; 1341 static wddoingadump = 0; 1342 extern caddr_t CADDR1; 1343 extern struct pte *CMAP1; 1344 1345 addr = (char *)0; /* starting address */ 1346 1347 #if DO_NOT_KNOW_HOW 1348 /* toss any characters present prior to dump, ie. non-blocking getc */ 1349 while (cngetc()) 1350 ; 1351 #endif 1352 1353 /* size of memory to dump */ 1354 lunit = WDUNIT(dev); 1355 part = WDPART(dev); /* file system */ 1356 /* check for acceptable drive number */ 1357 if (lunit >= NWD) 1358 return ENXIO; 1359 du = wddrives[lunit]; 1360 /* was it ever initialized ? */ 1361 if (du == 0 || du->dk_state < OPEN || du->dk_flags & DKFL_WRITEPROT) 1362 return ENXIO; 1363 1364 wdc = du->dk_port; 1365 ctrlr = du->dk_ctrlr; 1366 1367 /* Convert to disk sectors */ 1368 num = ctob(physmem) / du->dk_dd.d_secsize; 1369 1370 /* check if controller active */ 1371 /*if (wdtab[ctrlr].b_active) 1372 return EFAULT;*/ 1373 if (wddoingadump) 1374 return EFAULT; 1375 1376 secpertrk = du->dk_dd.d_nsectors; 1377 secpercyl = du->dk_dd.d_secpercyl; 1378 nblocks = du->dk_dd.d_partitions[part].p_size; 1379 blkoff = du->dk_dd.d_partitions[part].p_offset; 1380 1381 /*printf("xunit %x, nblocks %d, dumplo %d num %d\n", part, nblocks, 1382 dumplo, num);*/ 1383 /* check transfer bounds against partition size */ 1384 if (dumplo < 0 || dumplo + num > nblocks) 1385 return EINVAL; 1386 1387 /* mark controller active for if we panic during the dump */ 1388 /*wdtab[ctrlr].b_active = 1;*/ 1389 wddoingadump = 1; 1390 i = 200000000; 1391 if (wait_for_unbusy(du) < 0) 1392 return EIO; 1393 outb(wdc+wd_sdh, WDSD_IBM | (du->dk_unit << 4)); 1394 if (wait_for_ready(du) < 0) 1395 return EIO; 1396 if (wdcommand(du, WDCC_RESTORE | WD_STEP) < 0) 1397 return EIO; 1398 1399 /* some compaq controllers require this ... */ 1400 wdsetctlr(dev, du); 1401 1402 blknum = dumplo + blkoff; 1403 while (num > 0) { 1404 /* compute disk address */ 1405 cylin = blknum / secpercyl; 1406 head = (blknum % secpercyl) / secpertrk; 1407 sector = blknum % secpertrk; 1408 1409 if (du->dk_flags & DKFL_BADSECT) { 1410 long newblk; 1411 int i; 1412 1413 for (i = 0; du->dk_badsect[i] != -1; i++) { 1414 if (blknum < du->dk_badsect[i]) { 1415 /* sorted list, passed our block by */ 1416 break; 1417 } else if (blknum == du->dk_badsect[i]) { 1418 newblk = du->dk_dd.d_secperunit - 1419 du->dk_dd.d_nsectors - i - 1; 1420 cylin = newblk / secpercyl; 1421 head = (newblk % secpercyl) / secpertrk; 1422 sector = newblk % secpertrk; 1423 /* found and replaced; done */ 1424 break; 1425 } 1426 } 1427 } 1428 sector++; /* origin 1 */ 1429 1430 if (wait_for_unbusy(du) < 0) 1431 return EIO; 1432 /* select drive. */ 1433 outb(wdc+wd_sdh, WDSD_IBM | (du->dk_unit << 4) | (head & 0xf)); 1434 if (wait_for_ready(du) < 0) 1435 return EIO; 1436 1437 /* transfer some blocks */ 1438 outb(wdc+wd_sector, sector); 1439 outb(wdc+wd_seccnt, 1); 1440 outb(wdc+wd_cyl_lo, cylin); 1441 outb(wdc+wd_cyl_hi, cylin >> 8); 1442 #ifdef notdef 1443 /* lets just talk about this first...*/ 1444 printf("sdh 0%o sector %d cyl %d addr 0x%x", inb(wdc+wd_sdh), 1445 inb(wdc+wd_sector), 1446 (inb(wdc+wd_cyl_hi) << 8) + inb(wdc+wd_cyl_lo), addr); 1447 #endif 1448 stat = wdcommand(du, WDCC_WRITE); 1449 if (stat < 0 || stat & WDCS_ERR) 1450 return EIO; 1451 1452 #ifdef notdef /* cannot use this since this address was mapped differently */ 1453 pmap_enter(kernel_pmap, CADDR1, trunc_page(addr), VM_PROT_READ, TRUE); 1454 #else 1455 *(int *)CMAP1 = PG_V | PG_KW | ctob((long)addr); 1456 tlbflush(); 1457 #endif 1458 1459 outsw(wdc+wd_data, CADDR1 + ((int)addr & PGOFSET), 1460 DEV_BSIZE / sizeof(short)); 1461 1462 /* Check data request (should be done). */ 1463 if (inb(wdc+wd_status) & (WDCS_ERR | WDCS_DRQ)) 1464 return EIO; 1465 1466 if (wait_for_unbusy(du) < 0) 1467 return EIO; 1468 1469 /* error check the xfer */ 1470 if (inb(wdc+wd_status) & WDCS_ERR) 1471 return EIO; 1472 1473 if ((unsigned)addr % 1048576 == 0) 1474 printf("%d ", num / (1048576 / DEV_BSIZE)); 1475 1476 /* update block count */ 1477 num--; 1478 blknum++; 1479 (int)addr += DEV_BSIZE; 1480 1481 #if DO_NOT_KNOW_HOW 1482 /* operator aborting dump? non-blocking getc() */ 1483 if (cngetc()) 1484 return EINTR; 1485 #endif 1486 } 1487 return 0; 1488 } 1489 1490 /* 1491 * Internalize the bad sector table. 1492 */ 1493 void 1494 bad144intern(struct disk *du) 1495 { 1496 int i; 1497 if (du->dk_flags & DKFL_BADSECT) { 1498 for (i = 0; i < 127; i++) 1499 du->dk_badsect[i] = -1; 1500 for (i = 0; i < 126; i++) { 1501 if (du->dk_cpd.bad.bt_bad[i].bt_cyl == 0xffff) 1502 break; 1503 du->dk_badsect[i] = 1504 du->dk_cpd.bad.bt_bad[i].bt_cyl * 1505 du->dk_dd.d_secpercyl + 1506 (du->dk_cpd.bad.bt_bad[i].bt_trksec >> 8) * 1507 du->dk_dd.d_nsectors + 1508 (du->dk_cpd.bad.bt_bad[i].bt_trksec & 0x00ff); 1509 } 1510 } 1511 } 1512 1513 static int 1514 wdreset(struct disk *du, int err) 1515 { 1516 int wdc = du->dk_port; 1517 int stat; 1518 1519 if (err) 1520 printf("wdc%d: busy too long, resetting\n", du->dk_ctrlr); 1521 1522 /* reset the device */ 1523 outb(wdc+wd_ctlr, WDCTL_RST | WDCTL_IDS); 1524 DELAY(1000); 1525 outb(wdc+wd_ctlr, WDCTL_4BIT); 1526 1527 if (wait_for_unbusy(du) < 0) 1528 printf("wdc%d: failed to reset controller\n", du->dk_ctrlr); 1529 } 1530 1531 int 1532 wdc_wait(du, mask) 1533 struct disk *du; 1534 int mask; 1535 { 1536 int wdc = du->dk_port; 1537 int timeout = 0; 1538 int stat; 1539 1540 for (;;) { 1541 stat = inb(wdc+wd_altsts); 1542 if ((stat & WDCS_BUSY) == 0 && (stat & mask) == mask) 1543 break; 1544 DELAY(WDCDELAY); 1545 if (++timeout > WDCNDELAY) 1546 return -1; 1547 } 1548 #ifdef WDCNDELAY_DEBUG 1549 if (timeout > WDCNDELAY_DEBUG) 1550 printf("wdc%d: timeout took %dus\n", du->dk_ctrlr, 1551 WDCDELAY * timeout); 1552 #endif 1553 return stat; 1554 } 1555 1556 static int 1557 wdtimeout(caddr_t arg) 1558 { 1559 int x = splbio(); 1560 register int unit = (int)arg; 1561 1562 if (wdtimeoutstatus[unit] && --wdtimeoutstatus[unit] == 0) { 1563 struct disk *du = wddrives[unit]; 1564 int wdc = du->dk_port; 1565 1566 printf("wd%d: lost interrupt - status %x, error %x\n", 1567 unit, inb(wdc+wd_status), inb(wdc+wd_error)); 1568 outb(wdc+wd_ctlr, WDCTL_RST | WDCTL_IDS); 1569 DELAY(1000); 1570 outb(wdc+wd_ctlr, WDCTL_IDS); 1571 DELAY(1000); 1572 (void) inb(wdc+wd_error); 1573 outb(wdc+wd_ctlr, WDCTL_4BIT); 1574 du->dk_skip = 0; 1575 du->dk_flags |= DKFL_SINGLE; 1576 wdstart(du->dk_ctrlr); /* start controller */ 1577 } 1578 timeout((timeout_t)wdtimeout, (caddr_t)unit, hz*2); 1579 splx(x); 1580 return 0; 1581 } 1582 1583 #endif /* NWDC > 0 */ 1584
Indexes created Sun Sep 28 07:09:56 GMT 2025