wd.c revision 1.51
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 1.51 1994/03/02 21:42:31 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) 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 *bp, *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 bp = dp->b_actf; 378 if (bp == NULL) 379 return; 380 381 /* link onto controller queue */ 382 dp->b_forw = NULL; 383 if (wdtab[ctrlr].b_forw == NULL) 384 wdtab[ctrlr].b_forw = dp; 385 else 386 wdtab[ctrlr].b_actl->b_forw = dp; 387 wdtab[ctrlr].b_actl = dp; 388 389 /* mark the drive unit as busy */ 390 dp->b_active = 1; 391 } 392 393 /* 394 * Controller startup routine. This does the calculation, and starts 395 * a single-sector read or write operation. Called to start a transfer, 396 * or from the interrupt routine to continue a multi-sector transfer. 397 * RESTRICTIONS: 398 * 1. The transfer length must be an exact multiple of the sector size. 399 */ 400 static void 401 wdstart(int ctrlr) 402 { 403 register struct disk *du; /* disk unit for IO */ 404 register struct buf *bp; 405 struct disklabel *lp; 406 struct buf *dp; 407 long blknum, cylin, head, sector; 408 long secpertrk, secpercyl, addr; 409 int lunit, wdc; 410 int xfrblknum; 411 unsigned char status; 412 413 loop: 414 /* is there a drive for the controller to do a transfer with? */ 415 dp = wdtab[ctrlr].b_forw; 416 if (dp == NULL) 417 return; 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 wdtab[ctrlr].b_forw = dp->b_forw; 424 goto loop; 425 } 426 427 /* obtain controller and drive information */ 428 lunit = WDUNIT(bp->b_dev); 429 du = wddrives[lunit]; 430 431 /* clear any pending timeout, just in case */ 432 wdtimeoutstatus[lunit] = 0; 433 434 /* if not really a transfer, do control operations specially */ 435 if (du->dk_state < OPEN) { 436 (void) wdcontrol(bp); 437 return; 438 } 439 440 /* calculate transfer details */ 441 blknum = bp->b_blkno + du->dk_skip; 442 #ifdef WDDEBUG 443 if (du->dk_skip == 0) 444 printf("\nwdstart %d: %s %d@%d; map ", lunit, 445 (bp->b_flags & B_READ) ? "read" : "write", bp->b_bcount, 446 blknum); 447 else 448 printf(" %d)%x", du->dk_skip, inb(du->dk_port+wd_altsts)); 449 #endif 450 addr = (int)bp->b_un.b_addr; 451 if (du->dk_skip == 0) 452 du->dk_bc = bp->b_bcount; 453 if (du->dk_skipm == 0) { 454 struct buf *oldbp, *nextbp; 455 oldbp = bp; 456 nextbp = bp->b_actf; 457 du->dk_bct = du->dk_bc; 458 oldbp->b_flags |= B_XXX; 459 while (nextbp && (oldbp->b_flags & DKFL_SINGLE) == 0 && 460 oldbp->b_dev == nextbp->b_dev && nextbp->b_blkno == 461 (oldbp->b_blkno + (oldbp->b_bcount / DEV_BSIZE)) && 462 (oldbp->b_flags & B_READ) == (nextbp->b_flags & B_READ)) { 463 if ((du->dk_bct + nextbp->b_bcount) / DEV_BSIZE >= 240) 464 break; 465 du->dk_bct += nextbp->b_bcount; 466 nextbp->b_flags |= B_XXX; 467 oldbp = nextbp; 468 nextbp = nextbp->b_actf; 469 } 470 } 471 472 lp = &du->dk_dd; 473 secpertrk = lp->d_nsectors; 474 secpercyl = lp->d_secpercyl; 475 if ((du->dk_flags & DKFL_BSDLABEL) != 0 && WDPART(bp->b_dev) != WDRAW) 476 blknum += lp->d_partitions[WDPART(bp->b_dev)].p_offset; 477 cylin = blknum / secpercyl; 478 head = (blknum % secpercyl) / secpertrk; 479 sector = blknum % secpertrk; 480 481 /* Check for bad sectors if we have them, and not formatting */ 482 /* Only do this in single-sector mode, or when starting a */ 483 /* multiple-sector transfer. */ 484 if ((du->dk_flags & DKFL_BADSECT) && 485 #ifdef B_FORMAT 486 (bp->b_flags & B_FORMAT) == 0 && 487 #endif 488 (du->dk_skipm == 0 || (du->dk_flags & DKFL_SINGLE))) { 489 490 long blkchk, blkend, blknew; 491 int i; 492 493 blkend = blknum + howmany(du->dk_bct, DEV_BSIZE) - 1; 494 for (i = 0; (blkchk = du->dk_badsect[i]) != -1; i++) { 495 if (blkchk > blkend) 496 break; /* transfer is completely OK; done */ 497 if (blkchk == blknum) { 498 blknew = 499 lp->d_secperunit - lp->d_nsectors - i - 1; 500 cylin = blknew / secpercyl; 501 head = (blknew % secpercyl) / secpertrk; 502 sector = blknew % secpertrk; 503 du->dk_flags |= DKFL_SINGLE; 504 /* found and replaced first blk of transfer; done */ 505 break; 506 } else if (blkchk > blknum) { 507 du->dk_flags |= DKFL_SINGLE; 508 break; /* bad block inside transfer; done */ 509 } 510 } 511 } 512 if (du->dk_flags & DKFL_SINGLE) { 513 du->dk_bct = du->dk_bc; 514 du->dk_skipm = du->dk_skip; 515 } 516 517 #ifdef WDDEBUG 518 printf("c%d h%d s%d ", cylin, head, sector); 519 #endif 520 521 sector++; /* sectors begin with 1, not 0 */ 522 523 wdtab[ctrlr].b_active = 1; /* mark controller active */ 524 wdc = du->dk_port; 525 526 #ifdef INSTRUMENT 527 /* instrumentation */ 528 if (du->dk_unit >= 0 && du->dk_skip == 0) { 529 dk_busy |= 1 << du->dk_lunit; 530 dk_wds[du->dk_lunit] += bp->b_bcount >> 6; 531 } 532 if (du->dk_unit >= 0 && du->dk_skipm == 0) { 533 ++dk_seek[du->dk_lunit]; 534 ++dk_xfer[du->dk_lunit]; 535 } 536 #endif 537 538 retry: 539 /* if starting a multisector transfer, or doing single transfers */ 540 if (du->dk_skipm == 0 || (du->dk_flags & DKFL_SINGLE)) { 541 int command; 542 543 if (wdtab[ctrlr].b_errcnt && (bp->b_flags & B_READ) == 0) { 544 du->dk_bc += DEV_BSIZE; 545 du->dk_bct += DEV_BSIZE; 546 } 547 548 /* controller idle? */ 549 if (wait_for_unbusy(du) < 0) { 550 wdreset(du, 1); 551 goto retry; 552 } 553 554 /* stuff the task file */ 555 outb(wdc+wd_precomp, lp->d_precompcyl / 4); 556 #ifdef B_FORMAT 557 if (bp->b_flags & B_FORMAT) { 558 outb(wdc+wd_sector, lp->d_gap3); 559 outb(wdc+wd_seccnt, lp->d_nsectors); 560 } else { 561 if (du->dk_flags & DKFL_SINGLE) 562 outb(wdc+wd_seccnt, 1); 563 else 564 outb(wdc+wd_seccnt, 565 howmany(du->dk_bct, DEV_BSIZE)); 566 outb(wdc+wd_sector, sector); 567 } 568 #else 569 if (du->dk_flags & DKFL_SINGLE) 570 outb(wdc+wd_seccnt, 1); 571 else 572 outb(wdc+wd_seccnt, howmany(du->dk_bct, DEV_BSIZE)); 573 outb(wdc+wd_sector, sector); 574 #endif 575 outb(wdc+wd_cyl_lo, cylin); 576 outb(wdc+wd_cyl_hi, cylin >> 8); 577 578 /* set up the SDH register (select drive) */ 579 outb(wdc+wd_sdh, WDSD_IBM | (du->dk_unit<<4) | (head & 0xf)); 580 /* wait for drive to become ready */ 581 if (wait_for_ready(du) < 0) { 582 wdreset(du, 1); 583 goto retry; 584 } 585 586 /* initiate command! */ 587 #ifdef B_FORMAT 588 if (bp->b_flags & B_FORMAT) 589 command = WDCC_FORMAT; 590 else 591 command = 592 (bp->b_flags & B_READ) ? WDCC_READ : WDCC_WRITE; 593 #else 594 command = (bp->b_flags & B_READ) ? WDCC_READ : WDCC_WRITE; 595 #endif 596 if (wdcommand(du, command) < 0) { 597 wdreset(du, 1); 598 goto retry; 599 } 600 #ifdef WDDEBUG 601 printf("sector %d cylin %d head %d addr %x sts %x\n", sector, 602 cylin, head, addr, inb(wdc+wd_altsts)); 603 #endif 604 } 605 606 /* if this is a read operation, just go away until it's done. */ 607 if (bp->b_flags & B_READ) { 608 wdtimeoutstatus[lunit] = 2; 609 return; 610 } 611 612 if (wait_for_drq(du) < 0) { 613 wdreset(du, 1); 614 goto retry; 615 } 616 /* clear interrupt from command upload */ 617 (void) inb(wdc+wd_status); 618 /* then send it! */ 619 outsw(wdc+wd_data, addr + du->dk_skip * DEV_BSIZE, 620 DEV_BSIZE / sizeof(short)); 621 622 du->dk_bc -= DEV_BSIZE; 623 du->dk_bct -= DEV_BSIZE; 624 625 wdtimeoutstatus[lunit] = 2; 626 } 627 628 /* Interrupt routine for the controller. Acknowledge the interrupt, check for 629 * errors on the current operation, mark it done if necessary, and start 630 * the next request. Also check for a partially done transfer, and 631 * continue with the next chunk if so. 632 */ 633 void 634 wdintr(int ctrlr) 635 { 636 register struct disk *du; 637 register struct buf *bp, *dp; 638 int stat, wdc; 639 640 /* clear the pending interrupt */ 641 stat = inb(wdcontroller[ctrlr].dkc_port+wd_status); 642 #ifdef WDDEBUG 643 printf("i%02x ", stat); 644 #endif 645 646 if (!wdtab[ctrlr].b_active) { 647 printf("wdc%d: extra interrupt\n", ctrlr); 648 return; 649 } 650 651 dp = wdtab[ctrlr].b_forw; 652 bp = dp->b_actf; 653 du = wddrives[WDUNIT(bp->b_dev)]; 654 wdc = du->dk_port; 655 wdtimeoutstatus[WDUNIT(bp->b_dev)] = 0; 656 657 #ifdef WDDEBUG 658 printf("I%d ", ctrlr); 659 #endif 660 661 stat = wait_for_unbusy(du); 662 if (stat < 0) { 663 printf("wdc%d: timeout waiting for unbusy\n", ctrlr); 664 goto lose; 665 } 666 667 /* is it not a transfer, but a control operation? */ 668 if (du->dk_state < OPEN) { 669 wdtab[ctrlr].b_active = 0; 670 if (wdcontrol(bp)) 671 wdstart(ctrlr); 672 return; 673 } 674 675 /* have we an error? */ 676 if (stat & (WDCS_ERR | WDCS_ECCCOR)) { 677 lose: 678 du->dk_status = stat; 679 du->dk_error = inb(wdc+wd_error); 680 #ifdef WDDEBUG 681 printf("stat %x error %x\n", stat, du->dk_error); 682 #endif 683 if ((du->dk_flags & DKFL_SINGLE) == 0) { 684 du->dk_flags |= DKFL_ERROR; 685 goto outt; 686 } 687 #ifdef B_FORMAT 688 if (bp->b_flags & B_FORMAT) { 689 bp->b_error = EIO; 690 bp->b_flags |= B_ERROR; 691 goto done; 692 } 693 #endif 694 695 /* error or error correction? */ 696 if (stat & WDCS_ERR) { 697 if (++wdtab[ctrlr].b_errcnt < WDIORETRIES) 698 wdtab[ctrlr].b_active = 0; 699 else { 700 if ((du->dk_flags & DKFL_QUIET) == 0) { 701 diskerr(bp, "wd", "hard error", 702 LOG_PRINTF, du->dk_skip, 703 &du->dk_dd); 704 #ifdef WDDEBUG 705 printf("stat %b error %b\n", stat, 706 WDCS_BITS, inb(wdc+wd_error), 707 WDERR_BITS); 708 #endif 709 } 710 bp->b_error = EIO; 711 bp->b_flags |= B_ERROR; /* flag the error */ 712 } 713 } else if ((du->dk_flags & DKFL_QUIET) == 0) 714 diskerr(bp, "wd", "soft ecc", 0, du->dk_skip, 715 &du->dk_dd); 716 } 717 718 /* 719 * If this was a successful read operation, fetch the data. 720 */ 721 if (((bp->b_flags & (B_READ | B_ERROR)) == B_READ) && 722 wdtab[ctrlr].b_active) { 723 int chk; 724 725 chk = min(DEV_BSIZE / sizeof(short), du->dk_bc / sizeof(short)); 726 727 /* ready to receive data? */ 728 if (wait_for_drq(du) < 0) { 729 printf("wdc%d: timeout waiting for drq\n", ctrlr); 730 goto lose; 731 } 732 733 /* suck in data */ 734 insw(wdc+wd_data, 735 (int)bp->b_un.b_addr + du->dk_skip * DEV_BSIZE, chk); 736 du->dk_bc -= chk * sizeof(short); 737 du->dk_bct -= chk * sizeof(short); 738 739 /* for obselete fractional sector reads */ 740 while (chk++ < (DEV_BSIZE / sizeof(short))) 741 (void) inw(wdc+wd_data); 742 } 743 744 wdxfer[du->dk_lunit]++; 745 outt: 746 if (wdtab[ctrlr].b_active) { 747 #ifdef INSTRUMENT 748 if (du->dk_unit >= 0) 749 dk_busy &= ~(1 << du->dk_unit); 750 #endif 751 if ((bp->b_flags & B_ERROR) == 0) { 752 du->dk_skip++; /* Add to succ. sect */ 753 du->dk_skipm++; /* Add to succ. sect for multitransfer */ 754 if (wdtab[ctrlr].b_errcnt && 755 (du->dk_flags & DKFL_QUIET) == 0) 756 diskerr(bp, "wd", "soft error", 0, du->dk_skip, 757 &du->dk_dd); 758 wdtab[ctrlr].b_errcnt = 0; 759 760 /* see if more to transfer */ 761 if (du->dk_bc > 0 && (du->dk_flags & DKFL_ERROR) == 0) { 762 wdtab[ctrlr].b_active = 0; 763 wdstart(ctrlr); 764 return; /* next chunk is started */ 765 } else if ((du->dk_flags & (DKFL_SINGLE | DKFL_ERROR)) == DKFL_ERROR) { 766 du->dk_skip = 0; 767 du->dk_skipm = 0; 768 du->dk_flags &= ~DKFL_ERROR; 769 du->dk_flags |= DKFL_SINGLE; 770 wdtab[ctrlr].b_active = 0; 771 wdstart(ctrlr); 772 return; /* redo xfer sector by sector */ 773 } 774 } 775 776 done: 777 /* done with this transfer, with or without error */ 778 du->dk_flags &= ~DKFL_SINGLE; 779 wdtab[ctrlr].b_errcnt = 0; 780 if (du->dk_bct == 0) { 781 wdtab[ctrlr].b_forw = dp->b_forw; 782 du->dk_skipm = 0; 783 dp->b_active = 0; 784 } 785 bp->b_resid = bp->b_bcount - du->dk_skip * DEV_BSIZE; 786 bp->b_flags &= ~B_XXX; 787 du->dk_skip = 0; 788 dp->b_actf = bp->b_actf; 789 dp->b_errcnt = 0; 790 biodone(bp); 791 } 792 793 /* controller now idle */ 794 wdtab[ctrlr].b_active = 0; 795 796 /* anything more on drive queue? */ 797 if (dp->b_actf && du->dk_bct == 0) 798 wdustart(du); 799 800 /* anything more for controller to do? */ 801 if (wdtab[ctrlr].b_forw) 802 wdstart(ctrlr); 803 } 804 805 /* 806 * Initialize a drive. 807 */ 808 int 809 wdopen(dev_t dev, int flags, int fmt, struct proc *p) 810 { 811 register unsigned int lunit; 812 register struct disk *du; 813 int part = WDPART(dev), mask = 1 << part; 814 struct partition *pp; 815 char *msg; 816 817 lunit = WDUNIT(dev); 818 if (lunit >= NWD) 819 return ENXIO; 820 du = wddrives[lunit]; 821 if (du == 0) 822 return ENXIO; 823 824 #ifdef QUIETWORKS 825 if (part == WDRAW) 826 du->dk_flags |= DKFL_QUIET; 827 else 828 du->dk_flags &= ~DKFL_QUIET; 829 #else 830 du->dk_flags &= ~DKFL_QUIET; 831 #endif 832 833 if ((du->dk_flags & DKFL_BSDLABEL) == 0) { 834 du->dk_flags |= DKFL_WRITEPROT; 835 wdutab[lunit].b_actf = NULL; 836 837 /* 838 * Use the default sizes until we've read the label, 839 * or longer if there isn't one there. 840 */ 841 bzero(&du->dk_dd, sizeof(du->dk_dd)); 842 du->dk_dd.d_type = DTYPE_ST506; 843 du->dk_dd.d_ncylinders = 1024; 844 du->dk_dd.d_secsize = DEV_BSIZE; 845 du->dk_dd.d_ntracks = 8; 846 du->dk_dd.d_nsectors = 17; 847 du->dk_dd.d_secpercyl = 17*8; 848 du->dk_dd.d_secperunit = 17*8*1024; 849 du->dk_state = WANTOPEN; 850 851 /* read label using "raw" partition */ 852 #if defined(TIHMODS) && defined(garbage) 853 /* wdsetctlr(dev, du); */ /* Maybe do this TIH */ 854 msg = readdisklabel(makewddev(major(dev), WDUNIT(dev), WDRAW), 855 wdstrategy, &du->dk_dd, &du->dk_cpd); 856 wdsetctlr(dev, du); 857 #endif 858 if (msg = readdisklabel(makewddev(major(dev), WDUNIT(dev), 859 WDRAW), wdstrategy, &du->dk_dd, &du->dk_cpd)) { 860 if ((du->dk_flags & DKFL_QUIET) == 0) { 861 log(LOG_WARNING, 862 "wd%d: cannot find label (%s)\n", 863 lunit, msg); 864 return EINVAL; /* XXX needs translation */ 865 } 866 } else { 867 wdsetctlr(dev, du); 868 du->dk_flags |= DKFL_BSDLABEL; 869 du->dk_flags &= ~DKFL_WRITEPROT; 870 if (du->dk_dd.d_flags & D_BADSECT) 871 du->dk_flags |= DKFL_BADSECT; 872 } 873 } 874 875 if (du->dk_flags & DKFL_BADSECT) 876 bad144intern(du); 877 878 /* 879 * Warn if a partion is opened 880 * that overlaps another partition which is open 881 * unless one is the "raw" partition (whole disk). 882 */ 883 if ((du->dk_openpart & mask) == 0 && part != WDRAW) { 884 int start, end; 885 886 pp = &du->dk_dd.d_partitions[part]; 887 start = pp->p_offset; 888 end = pp->p_offset + pp->p_size; 889 for (pp = du->dk_dd.d_partitions; 890 pp < &du->dk_dd.d_partitions[du->dk_dd.d_npartitions]; 891 pp++) { 892 if (pp->p_offset + pp->p_size <= start || 893 pp->p_offset >= end) 894 continue; 895 if (pp - du->dk_dd.d_partitions == WDRAW) 896 continue; 897 if (du->dk_openpart & (1 << (pp - du->dk_dd.d_partitions))) 898 log(LOG_WARNING, 899 "wd%d%c: overlaps open partition (%c)\n", 900 lunit, part + 'a', 901 pp - du->dk_dd.d_partitions + 'a'); 902 } 903 } 904 if (part >= du->dk_dd.d_npartitions && part != WDRAW) 905 return ENXIO; 906 907 /* insure only one open at a time */ 908 du->dk_openpart |= mask; 909 switch (fmt) { 910 case S_IFCHR: 911 du->dk_copenpart |= mask; 912 break; 913 case S_IFBLK: 914 du->dk_bopenpart |= mask; 915 break; 916 } 917 return 0; 918 } 919 920 /* 921 * Implement operations other than read/write. 922 * Called from wdstart or wdintr during opens and formats. 923 * Uses finite-state-machine to track progress of operation in progress. 924 * Returns 0 if operation still in progress, 1 if completed. 925 */ 926 static int 927 wdcontrol(register struct buf *bp) 928 { 929 register struct disk *du; 930 register unit, lunit; 931 unsigned char stat; 932 int s, ctrlr; 933 int wdc; 934 935 du = wddrives[WDUNIT(bp->b_dev)]; 936 ctrlr = du->dk_ctrlr; 937 unit = du->dk_unit; 938 lunit = du->dk_lunit; 939 wdc = du->dk_port; 940 941 switch (du->dk_state) { 942 case WANTOPEN: /* set SDH, step rate, do restore */ 943 tryagainrecal: 944 #ifdef WDDEBUG 945 printf("wd%d: recal ", lunit); 946 #endif 947 s = splbio(); /* not called from intr level ... */ 948 wdgetctlr(unit, du); 949 950 if (wait_for_unbusy(du) < 0) { 951 wdreset(du, 1); 952 goto tryagainrecal; 953 } 954 955 outb(wdc+wd_sdh, WDSD_IBM | (unit << 4)); 956 if (wait_for_ready(du) < 0) { 957 wdreset(du, 1); 958 goto tryagainrecal; 959 } 960 961 wdtab[ctrlr].b_active = 1; 962 if (wdcommand(du, WDCC_RESTORE | WD_STEP) < 0) { 963 wdreset(du, 1); 964 goto tryagainrecal; 965 } 966 du->dk_state = RECAL; 967 splx(s); 968 return 0; 969 case RECAL: 970 if ((stat = inb(wdc+wd_altsts)) & WDCS_ERR) { 971 if ((du->dk_flags & DKFL_QUIET) == 0) { 972 printf("wd%d: recal", du->dk_lunit); 973 printf(": status %b error %b\n", stat, 974 WDCS_BITS, inb(wdc+wd_error), WDERR_BITS); 975 } 976 if (++wdtab[ctrlr].b_errcnt < WDIORETRIES) 977 goto tryagainrecal; 978 bp->b_error = ENXIO; /* XXX needs translation */ 979 goto badopen; 980 } 981 982 /* some controllers require this ... */ 983 wdsetctlr(bp->b_dev, du); 984 985 wdtab[ctrlr].b_errcnt = 0; 986 du->dk_state = OPEN; 987 /* 988 * The rest of the initialization can be done 989 * by normal means. 990 */ 991 return 1; 992 default: 993 panic("wdcontrol"); 994 } 995 /* NOTREACHED */ 996 997 badopen: 998 if ((du->dk_flags & DKFL_QUIET) == 0) 999 printf(": status %b error %b\n", stat, WDCS_BITS, 1000 inb(wdc+wd_error), WDERR_BITS); 1001 bp->b_flags |= B_ERROR; 1002 return 1; 1003 } 1004 1005 /* 1006 * send a command and wait uninterruptibly until controller is finished. 1007 * return -1 if controller busy for too long, otherwise 1008 * return status. intended for brief controller commands at critical points. 1009 * assumes interrupts are blocked. 1010 */ 1011 static int 1012 wdcommand(struct disk *du, int cmd) 1013 { 1014 int timeout, stat, wdc; 1015 1016 /*DELAY(2000);*/ 1017 wdc = du->dk_port; 1018 1019 /* controller ready for command? */ 1020 if (wait_for_unbusy(du) < 0) 1021 return -1; 1022 1023 /* send command, await results */ 1024 outb(wdc+wd_command, cmd); 1025 1026 switch (cmd) { 1027 default: 1028 #if 0 1029 case WDCC_READ: 1030 case WDCC_FORMAT: 1031 case WDCC_RESTORE | WD_STEP: 1032 case WDCC_IDC: 1033 case WDCC_DIAGNOSE: 1034 case WDCC_WRITE: 1035 #endif 1036 return wait_for_unbusy(du); 1037 case WDCC_READP: 1038 return wait_for_drq(du); 1039 } 1040 } 1041 1042 /* 1043 * issue IDC to drive to tell it just what geometry it is to be. 1044 */ 1045 static int 1046 wdsetctlr(dev_t dev, struct disk *du) 1047 { 1048 int stat, x, wdc; 1049 1050 #ifdef WDDEBUG 1051 printf("wd(%d,%d) C%dH%dS%d\n", du->dk_ctrlr, du->dk_unit, 1052 du->dk_dd.d_ncylinders, du->dk_dd.d_ntracks, du->dk_dd.d_nsectors); 1053 #endif 1054 1055 wdc = du->dk_port; 1056 1057 x = splbio(); 1058 if (wait_for_unbusy(du) < 0) 1059 return -1; 1060 outb(wdc+wd_cyl_lo, du->dk_dd.d_ncylinders); /* TIH: was ...ders+1 */ 1061 outb(wdc+wd_cyl_hi, du->dk_dd.d_ncylinders>>8); /* TIH: was ...ders+1 */ 1062 outb(wdc+wd_sdh, 1063 WDSD_IBM | (du->dk_unit << 4) + du->dk_dd.d_ntracks - 1); 1064 outb(wdc+wd_seccnt, du->dk_dd.d_nsectors); 1065 if (wait_for_ready(du) < 0) 1066 return -1; 1067 stat = wdcommand(du, WDCC_IDC); 1068 if (stat < 0 || stat & WDCS_ERR) 1069 printf("wdsetctlr: stat %b error %b\n", stat, WDCS_BITS, 1070 inb(wdc+wd_error), WDERR_BITS); 1071 splx(x); 1072 return stat; 1073 } 1074 1075 /* 1076 * issue READP to drive to ask it what it is. 1077 */ 1078 static int 1079 wdgetctlr(int u, struct disk *du) 1080 { 1081 int stat, x, i, wdc; 1082 char tb[DEV_BSIZE]; 1083 struct wdparams *wp; 1084 1085 x = splbio(); /* not called from intr level ... */ 1086 wdc = du->dk_port; 1087 if (wait_for_unbusy(du) < 0) { 1088 splx(x); 1089 return -1; 1090 } 1091 1092 outb(wdc+wd_sdh, WDSD_IBM | (u << 4)); 1093 if (wait_for_ready(du) < 0) { 1094 splx(x); 1095 return -1; 1096 } 1097 1098 stat = wdcommand(du, WDCC_READP); 1099 if (stat < 0) { 1100 splx(x); 1101 return -1; 1102 } 1103 1104 if ((stat & WDCS_ERR) == 0) { 1105 /* obtain parameters */ 1106 wp = &du->dk_params; 1107 insw(wdc+wd_data, tb, sizeof(tb)/sizeof(short)); 1108 bcopy(tb, wp, sizeof(struct wdparams)); 1109 1110 /* shuffle string byte order */ 1111 for (i = 0; i < sizeof(wp->wdp_model); i += 2) { 1112 u_short *p; 1113 p = (u_short *)(wp->wdp_model + i); 1114 *p = ntohs(*p); 1115 } 1116 1117 strncpy(du->dk_dd.d_typename, "ESDI/IDE", 1118 sizeof du->dk_dd.d_typename); 1119 du->dk_dd.d_type = DTYPE_ESDI; 1120 bcopy(wp->wdp_model+20, du->dk_dd.d_packname, 14-1); 1121 1122 /* update disklabel given drive information */ 1123 du->dk_dd.d_ncylinders = 1124 wp->wdp_fixedcyl + wp->wdp_removcyl /*+- 1*/; 1125 du->dk_dd.d_ntracks = wp->wdp_heads; 1126 du->dk_dd.d_nsectors = wp->wdp_sectors; 1127 du->dk_dd.d_secpercyl = 1128 du->dk_dd.d_ntracks * du->dk_dd.d_nsectors; 1129 du->dk_dd.d_partitions[1].p_size = 1130 du->dk_dd.d_secpercyl * wp->wdp_sectors; 1131 du->dk_dd.d_partitions[1].p_offset = 0; 1132 } else { 1133 /* 1134 * If WDCC_READP fails then we might have an old drive 1135 * so we try a seek to 0; if that passes then the 1136 * drive is there but it's OLD AND KRUSTY. 1137 */ 1138 stat = wdcommand(du, WDCC_RESTORE | WD_STEP); 1139 if (stat < 0 || stat & WDCS_ERR) { 1140 splx(x); 1141 return inb(wdc+wd_error); 1142 } 1143 1144 strncpy(du->dk_dd.d_typename, "ST506", 1145 sizeof du->dk_dd.d_typename); 1146 strncpy(du->dk_params.wdp_model, "Unknown Type", 1147 sizeof du->dk_params.wdp_model); 1148 du->dk_dd.d_type = DTYPE_ST506; 1149 } 1150 1151 #if 0 1152 printf("gc %x cyl %d trk %d sec %d type %d sz %d model %s\n", 1153 wp->wdp_config, wp->wdp_fixedcyl + wp->wdp_removcyl, wp->wdp_heads, 1154 wp->wdp_sectors, wp->wdp_cntype, wp->wdp_cnsbsz, wp->wdp_model); 1155 #endif 1156 1157 /* better ... */ 1158 du->dk_dd.d_subtype |= DSTYPE_GEOMETRY; 1159 1160 /* XXX sometimes possibly needed */ 1161 (void) inb(wdc+wd_status); 1162 splx(x); 1163 return 0; 1164 } 1165 1166 1167 /* ARGSUSED */ 1168 int 1169 wdclose(dev_t dev, int flags, int fmt) 1170 { 1171 register struct disk *du; 1172 int part = WDPART(dev), mask = 1 << part; 1173 1174 du = wddrives[WDUNIT(dev)]; 1175 1176 /* insure only one open at a time */ 1177 du->dk_openpart &= ~mask; 1178 switch (fmt) { 1179 case S_IFCHR: 1180 du->dk_copenpart &= ~mask; 1181 break; 1182 case S_IFBLK: 1183 du->dk_bopenpart &= ~mask; 1184 break; 1185 } 1186 return 0; 1187 } 1188 1189 int 1190 wdioctl(dev_t dev, int cmd, caddr_t addr, int flag, struct proc *p) 1191 { 1192 int lunit = WDUNIT(dev); 1193 register struct disk *du; 1194 int error = 0; 1195 struct uio auio; 1196 struct iovec aiov; 1197 1198 du = wddrives[lunit]; 1199 1200 switch (cmd) { 1201 case DIOCSBAD: 1202 if ((flag & FWRITE) == 0) 1203 error = EBADF; 1204 else { 1205 du->dk_cpd.bad = *(struct dkbad *)addr; 1206 bad144intern(du); 1207 } 1208 break; 1209 1210 case DIOCGDINFO: 1211 *(struct disklabel *)addr = du->dk_dd; 1212 break; 1213 1214 case DIOCGPART: 1215 ((struct partinfo *)addr)->disklab = &du->dk_dd; 1216 ((struct partinfo *)addr)->part = 1217 &du->dk_dd.d_partitions[WDPART(dev)]; 1218 break; 1219 1220 case DIOCSDINFO: 1221 if ((flag & FWRITE) == 0) 1222 error = EBADF; 1223 else { 1224 error = setdisklabel(&du->dk_dd, (struct disklabel *)addr, 1225 /*(du->dk_flags & DKFL_BSDLABEL) ? du->dk_openpart : */0, 1226 &du->dk_cpd); 1227 } 1228 if (error == 0) { 1229 du->dk_flags |= DKFL_BSDLABEL; 1230 wdsetctlr(dev, du); 1231 } 1232 break; 1233 1234 case DIOCWLABEL: 1235 du->dk_flags &= ~DKFL_WRITEPROT; 1236 if ((flag & FWRITE) == 0) 1237 error = EBADF; 1238 else 1239 du->dk_wlabel = *(int *)addr; 1240 break; 1241 1242 case DIOCWDINFO: 1243 du->dk_flags &= ~DKFL_WRITEPROT; 1244 if ((flag & FWRITE) == 0) 1245 error = EBADF; 1246 else if ((error = setdisklabel(&du->dk_dd, 1247 (struct disklabel *)addr, 1248 /*(du->dk_flags & DKFL_BSDLABEL) ? du->dk_openpart :*/0, 1249 &du->dk_cpd)) == 0) { 1250 int wlab; 1251 1252 du->dk_flags |= DKFL_BSDLABEL; 1253 wdsetctlr(dev, du); 1254 1255 /* simulate opening partition 0 so write succeeds */ 1256 du->dk_openpart |= (1 << 0); /* XXX */ 1257 wlab = du->dk_wlabel; 1258 du->dk_wlabel = 1; 1259 error = writedisklabel(dev, wdstrategy, &du->dk_dd, &du->dk_cpd); 1260 du->dk_openpart = du->dk_copenpart | du->dk_bopenpart; 1261 du->dk_wlabel = wlab; 1262 } 1263 break; 1264 1265 #ifdef notyet 1266 case DIOCGDINFOP: 1267 *(struct disklabel **)addr = &du->dk_dd; 1268 break; 1269 1270 case DIOCWFORMAT: 1271 if ((flag & FWRITE) == 0) 1272 error = EBADF; 1273 else { 1274 register struct format_op *fop; 1275 1276 fop = (struct format_op *)addr; 1277 aiov.iov_base = fop->df_buf; 1278 aiov.iov_len = fop->df_count; 1279 auio.uio_iov = &aiov; 1280 auio.uio_iovcnt = 1; 1281 auio.uio_resid = fop->df_count; 1282 auio.uio_segflg = 0; 1283 auio.uio_offset = 1284 fop->df_startblk * du->dk_dd.d_secsize; 1285 error = physio(wdformat, &rwdbuf[lunit], dev, B_WRITE, 1286 minphys, &auio); 1287 fop->df_count -= auio.uio_resid; 1288 fop->df_reg[0] = du->dk_status; 1289 fop->df_reg[1] = du->dk_error; 1290 } 1291 break; 1292 #endif 1293 1294 default: 1295 error = ENOTTY; 1296 break; 1297 } 1298 return error; 1299 } 1300 1301 #ifdef B_FORMAT 1302 int 1303 wdformat(struct buf *bp) 1304 { 1305 1306 bp->b_flags |= B_FORMAT; 1307 return wdstrategy(bp); 1308 } 1309 #endif 1310 1311 int 1312 wdsize(dev_t dev) 1313 { 1314 int lunit = WDUNIT(dev), part = WDPART(dev); 1315 struct disk *du; 1316 1317 if (lunit >= NWD) 1318 return -1; 1319 du = wddrives[lunit]; 1320 if (du == 0) 1321 return -1; 1322 1323 if (du->dk_state < OPEN || (du->dk_flags & DKFL_BSDLABEL) == 0) { 1324 int val; 1325 val = wdopen(makewddev(major(dev), lunit, WDRAW), FREAD, 1326 S_IFBLK, 0); 1327 if (val != 0) 1328 return -1; 1329 } 1330 1331 if ((du->dk_flags & (DKFL_WRITEPROT | DKFL_BSDLABEL)) != DKFL_BSDLABEL) 1332 return -1; 1333 1334 return (int)du->dk_dd.d_partitions[part].p_size; 1335 } 1336 1337 extern char *vmmap; /* poor name! */ 1338 1339 /* dump core after a system crash */ 1340 int 1341 wddump(dev_t dev) 1342 { 1343 register struct disk *du; /* disk unit to do the IO */ 1344 long num; /* number of sectors to write */ 1345 int ctrlr, lunit, part, wdc; 1346 long blkoff, blknum; 1347 long cylin, head, sector, stat; 1348 long secpertrk, secpercyl, nblocks, i; 1349 char *addr; 1350 static wddoingadump = 0; 1351 extern caddr_t CADDR1; 1352 extern struct pte *CMAP1; 1353 1354 addr = (char *)0; /* starting address */ 1355 1356 #if DO_NOT_KNOW_HOW 1357 /* toss any characters present prior to dump, ie. non-blocking getc */ 1358 while (cngetc()) 1359 ; 1360 #endif 1361 1362 /* size of memory to dump */ 1363 lunit = WDUNIT(dev); 1364 part = WDPART(dev); /* file system */ 1365 /* check for acceptable drive number */ 1366 if (lunit >= NWD) 1367 return ENXIO; 1368 du = wddrives[lunit]; 1369 /* was it ever initialized ? */ 1370 if (du == 0 || du->dk_state < OPEN || du->dk_flags & DKFL_WRITEPROT) 1371 return ENXIO; 1372 1373 wdc = du->dk_port; 1374 ctrlr = du->dk_ctrlr; 1375 1376 /* Convert to disk sectors */ 1377 num = ctob(physmem) / du->dk_dd.d_secsize; 1378 1379 /* check if controller active */ 1380 /*if (wdtab[ctrlr].b_active) 1381 return EFAULT;*/ 1382 if (wddoingadump) 1383 return EFAULT; 1384 1385 secpertrk = du->dk_dd.d_nsectors; 1386 secpercyl = du->dk_dd.d_secpercyl; 1387 nblocks = du->dk_dd.d_partitions[part].p_size; 1388 blkoff = du->dk_dd.d_partitions[part].p_offset; 1389 1390 /*printf("xunit %x, nblocks %d, dumplo %d num %d\n", part, nblocks, 1391 dumplo, num);*/ 1392 /* check transfer bounds against partition size */ 1393 if (dumplo < 0 || dumplo + num > nblocks) 1394 return EINVAL; 1395 1396 /* mark controller active for if we panic during the dump */ 1397 /*wdtab[ctrlr].b_active = 1;*/ 1398 wddoingadump = 1; 1399 i = 200000000; 1400 if (wait_for_unbusy(du) < 0) 1401 return EIO; 1402 outb(wdc+wd_sdh, WDSD_IBM | (du->dk_unit << 4)); 1403 if (wait_for_ready(du) < 0) 1404 return EIO; 1405 if (wdcommand(du, WDCC_RESTORE | WD_STEP) < 0) 1406 return EIO; 1407 1408 /* some compaq controllers require this ... */ 1409 wdsetctlr(dev, du); 1410 1411 blknum = dumplo + blkoff; 1412 while (num > 0) { 1413 /* compute disk address */ 1414 cylin = blknum / secpercyl; 1415 head = (blknum % secpercyl) / secpertrk; 1416 sector = blknum % secpertrk; 1417 1418 if (du->dk_flags & DKFL_BADSECT) { 1419 long newblk; 1420 int i; 1421 1422 for (i = 0; du->dk_badsect[i] != -1; i++) { 1423 if (blknum < du->dk_badsect[i]) { 1424 /* sorted list, passed our block by */ 1425 break; 1426 } else if (blknum == du->dk_badsect[i]) { 1427 newblk = du->dk_dd.d_secperunit - 1428 du->dk_dd.d_nsectors - i - 1; 1429 cylin = newblk / secpercyl; 1430 head = (newblk % secpercyl) / secpertrk; 1431 sector = newblk % secpertrk; 1432 /* found and replaced; done */ 1433 break; 1434 } 1435 } 1436 } 1437 sector++; /* origin 1 */ 1438 1439 if (wait_for_unbusy(du) < 0) 1440 return EIO; 1441 /* select drive. */ 1442 outb(wdc+wd_sdh, WDSD_IBM | (du->dk_unit << 4) | (head & 0xf)); 1443 if (wait_for_ready(du) < 0) 1444 return EIO; 1445 1446 /* transfer some blocks */ 1447 outb(wdc+wd_sector, sector); 1448 outb(wdc+wd_seccnt, 1); 1449 outb(wdc+wd_cyl_lo, cylin); 1450 outb(wdc+wd_cyl_hi, cylin >> 8); 1451 #ifdef notdef 1452 /* lets just talk about this first...*/ 1453 printf("sdh 0%o sector %d cyl %d addr 0x%x", inb(wdc+wd_sdh), 1454 inb(wdc+wd_sector), 1455 (inb(wdc+wd_cyl_hi) << 8) + inb(wdc+wd_cyl_lo), addr); 1456 #endif 1457 stat = wdcommand(du, WDCC_WRITE); 1458 if (stat < 0 || stat & WDCS_ERR) 1459 return EIO; 1460 1461 #ifdef notdef /* cannot use this since this address was mapped differently */ 1462 pmap_enter(kernel_pmap, CADDR1, trunc_page(addr), VM_PROT_READ, TRUE); 1463 #else 1464 *(int *)CMAP1 = PG_V | PG_KW | ctob((long)addr); 1465 tlbflush(); 1466 #endif 1467 1468 outsw(wdc+wd_data, CADDR1 + ((int)addr & PGOFSET), 1469 DEV_BSIZE / sizeof(short)); 1470 1471 /* Check data request (should be done). */ 1472 if (inb(wdc+wd_status) & (WDCS_ERR | WDCS_DRQ)) 1473 return EIO; 1474 1475 if (wait_for_unbusy(du) < 0) 1476 return EIO; 1477 1478 /* error check the xfer */ 1479 if (inb(wdc+wd_status) & WDCS_ERR) 1480 return EIO; 1481 1482 if ((unsigned)addr % 1048576 == 0) 1483 printf("%d ", num / (1048576 / DEV_BSIZE)); 1484 1485 /* update block count */ 1486 num--; 1487 blknum++; 1488 (int)addr += DEV_BSIZE; 1489 1490 #if DO_NOT_KNOW_HOW 1491 /* operator aborting dump? non-blocking getc() */ 1492 if (cngetc()) 1493 return EINTR; 1494 #endif 1495 } 1496 return 0; 1497 } 1498 1499 /* 1500 * Internalize the bad sector table. 1501 */ 1502 void 1503 bad144intern(struct disk *du) 1504 { 1505 int i; 1506 if (du->dk_flags & DKFL_BADSECT) { 1507 for (i = 0; i < 127; i++) 1508 du->dk_badsect[i] = -1; 1509 for (i = 0; i < 126; i++) { 1510 if (du->dk_cpd.bad.bt_bad[i].bt_cyl == 0xffff) 1511 break; 1512 du->dk_badsect[i] = 1513 du->dk_cpd.bad.bt_bad[i].bt_cyl * 1514 du->dk_dd.d_secpercyl + 1515 (du->dk_cpd.bad.bt_bad[i].bt_trksec >> 8) * 1516 du->dk_dd.d_nsectors + 1517 (du->dk_cpd.bad.bt_bad[i].bt_trksec & 0x00ff); 1518 } 1519 } 1520 } 1521 1522 static int 1523 wdreset(struct disk *du, int err) 1524 { 1525 int wdc = du->dk_port; 1526 int stat; 1527 1528 if (err) 1529 printf("wdc%d: busy too long, resetting\n", du->dk_ctrlr); 1530 1531 /* reset the device */ 1532 outb(wdc+wd_ctlr, WDCTL_RST | WDCTL_IDS); 1533 DELAY(1000); 1534 outb(wdc+wd_ctlr, WDCTL_4BIT); 1535 1536 if (wait_for_unbusy(du) < 0) 1537 printf("wdc%d: failed to reset controller\n", du->dk_ctrlr); 1538 } 1539 1540 int 1541 wdc_wait(du, mask) 1542 struct disk *du; 1543 int mask; 1544 { 1545 int wdc = du->dk_port; 1546 int timeout = 0; 1547 int stat; 1548 1549 for (;;) { 1550 stat = inb(wdc+wd_altsts); 1551 if ((stat & WDCS_BUSY) == 0) 1552 /* XXXX Yuck. Need to redo this junk. */ 1553 if (mask == 0 || (stat & mask) != 0) 1554 break; 1555 DELAY(WDCDELAY); 1556 if (++timeout > WDCNDELAY) 1557 return -1; 1558 } 1559 #ifdef WDCNDELAY_DEBUG 1560 if (timeout > WDCNDELAY_DEBUG) 1561 printf("wdc%d: timeout took %dus\n", du->dk_ctrlr, 1562 WDCDELAY * timeout); 1563 #endif 1564 return stat; 1565 } 1566 1567 static int 1568 wdtimeout(caddr_t arg) 1569 { 1570 int x = splbio(); 1571 register int unit = (int)arg; 1572 1573 if (wdtimeoutstatus[unit] && --wdtimeoutstatus[unit] == 0) { 1574 struct disk *du = wddrives[unit]; 1575 int wdc = du->dk_port; 1576 1577 printf("wd%d: lost interrupt - status %x, error %x\n", 1578 unit, inb(wdc+wd_status), inb(wdc+wd_error)); 1579 outb(wdc+wd_ctlr, WDCTL_RST | WDCTL_IDS); 1580 DELAY(1000); 1581 outb(wdc+wd_ctlr, WDCTL_IDS); 1582 DELAY(1000); 1583 (void) inb(wdc+wd_error); 1584 outb(wdc+wd_ctlr, WDCTL_4BIT); 1585 du->dk_skip = 0; 1586 du->dk_flags |= DKFL_SINGLE; 1587 wdstart(du->dk_ctrlr); /* start controller */ 1588 } 1589 timeout((timeout_t)wdtimeout, (caddr_t)unit, hz*2); 1590 splx(x); 1591 return 0; 1592 } 1593 1594 #endif /* NWDC > 0 */ 1595
Indexes created Sun Sep 28 07:09:56 GMT 2025