1 /* up.c 4.68 83/02/10 */ 2 3 #include "up.h" 4 #if NSC > 0 5 /* 6 * UNIBUS disk driver with: 7 * overlapped seeks, 8 * ECC recovery, and 9 * bad sector forwarding. 10 * 11 * TODO: 12 * Check that offset recovery code works 13 */ 14 #include "../machine/pte.h" 15 16 #include "../h/param.h" 17 #include "../h/systm.h" 18 #include "../h/dk.h" 19 #include "../h/dkbad.h" 20 #include "../h/buf.h" 21 #include "../h/conf.h" 22 #include "../h/dir.h" 23 #include "../h/user.h" 24 #include "../h/map.h" 25 #include "../h/vm.h" 26 #include "../h/cmap.h" 27 #include "../h/uio.h" 28 #include "../h/kernel.h" 29 30 #include "../vax/cpu.h" 31 #include "../vax/nexus.h" 32 #include "../vaxuba/ubavar.h" 33 #include "../vaxuba/ubareg.h" 34 #include "../vaxuba/upreg.h" 35 36 struct up_softc { 37 int sc_softas; 38 int sc_ndrive; 39 int sc_wticks; 40 int sc_recal; 41 } up_softc[NSC]; 42 43 /* THIS SHOULD BE READ OFF THE PACK, PER DRIVE */ 44 struct size { 45 daddr_t nblocks; 46 int cyloff; 47 } up_sizes[8] = { 48 15884, 0, /* A=cyl 0 thru 26 */ 49 33440, 27, /* B=cyl 27 thru 81 */ 50 495520, 0, /* C=cyl 0 thru 814 */ 51 15884, 562, /* D=cyl 562 thru 588 */ 52 55936, 589, /* E=cyl 589 thru 680 */ 53 81376, 681, /* F=cyl 681 thru 814 */ 54 153728, 562, /* G=cyl 562 thru 814 */ 55 291346, 82, /* H=cyl 82 thru 561 */ 56 }, fj_sizes[8] = { 57 15884, 0, /* A=cyl 0 thru 49 */ 58 33440, 50, /* B=cyl 50 thru 154 */ 59 263360, 0, /* C=cyl 0 thru 822 */ 60 0, 0, 61 0, 0, 62 0, 0, 63 0, 0, 64 213664, 155, /* H=cyl 155 thru 822 */ 65 }, upam_sizes[8] = { 66 15884, 0, /* A=cyl 0 thru 31 */ 67 33440, 32, /* B=cyl 32 thru 97 */ 68 524288, 0, /* C=cyl 0 thru 1023 */ 69 27786, 668, 70 27786, 723, 71 125440, 778, 72 181760, 668, /* G=cyl 668 thru 1022 */ 73 291346, 98, /* H=cyl 98 thru 667 */ 74 }; 75 /* END OF STUFF WHICH SHOULD BE READ IN PER DISK */ 76 77 /* 78 * On a 780 upSDIST could be 2, but 79 * in the interest of 750's... 80 */ 81 #define _upSDIST 3 /* 1.5 msec */ 82 #define _upRDIST 4 /* 2.0 msec */ 83 84 int upSDIST = _upSDIST; 85 int upRDIST = _upRDIST; 86 87 int upprobe(), upslave(), upattach(), updgo(), upintr(); 88 struct uba_ctlr *upminfo[NSC]; 89 struct uba_device *updinfo[NUP]; 90 #define UPIPUNITS 8 91 struct uba_device *upip[NSC][UPIPUNITS]; /* fuji w/fixed head gives n,n+4 */ 92 93 u_short upstd[] = { 0776700, 0774400, 0776300, 0 }; 94 struct uba_driver scdriver = 95 { upprobe, upslave, upattach, updgo, upstd, "up", updinfo, "sc", upminfo }; 96 struct buf uputab[NUP]; 97 char upinit[NUP]; 98 99 struct upst { 100 short nsect; 101 short ntrak; 102 short nspc; 103 short ncyl; 104 struct size *sizes; 105 } upst[] = { 106 32, 19, 32*19, 823, up_sizes, /* 9300/cdc */ 107 /* 9300 actually has 815 cylinders... */ 108 32, 10, 32*10, 823, fj_sizes, /* fujitsu 160m */ 109 32, 16, 32*16, 1024, upam_sizes, /* ampex capricorn */ 110 }; 111 112 u_char up_offset[16] = { 113 UPOF_P400, UPOF_M400, UPOF_P400, UPOF_M400, 114 UPOF_P800, UPOF_M800, UPOF_P800, UPOF_M800, 115 UPOF_P1200, UPOF_M1200, UPOF_P1200, UPOF_M1200, 116 0, 0, 0, 0 117 }; 118 119 struct buf rupbuf[NUP]; 120 struct buf bupbuf[NUP]; 121 struct dkbad upbad[NUP]; 122 123 #define b_cylin b_resid 124 125 #ifdef INTRLVE 126 daddr_t dkblock(); 127 #endif 128 129 int upwstart, upwatch(); /* Have started guardian */ 130 int upseek; 131 int upwaitdry; 132 133 /*ARGSUSED*/ 134 upprobe(reg) 135 caddr_t reg; 136 { 137 register int br, cvec; 138 139 #ifdef lint 140 br = 0; cvec = br; br = cvec; 141 #endif 142 ((struct updevice *)reg)->upcs1 = UP_IE|UP_RDY; 143 DELAY(10); 144 ((struct updevice *)reg)->upcs1 = 0; 145 return (sizeof (struct updevice)); 146 } 147 148 upslave(ui, reg) 149 struct uba_device *ui; 150 caddr_t reg; 151 { 152 register struct updevice *upaddr = (struct updevice *)reg; 153 154 upaddr->upcs1 = 0; /* conservative */ 155 upaddr->upcs2 = ui->ui_slave; 156 upaddr->upcs1 = UP_NOP|UP_GO; 157 if (upaddr->upcs2&UPCS2_NED) { 158 upaddr->upcs1 = UP_DCLR|UP_GO; 159 return (0); 160 } 161 return (1); 162 } 163 164 upattach(ui) 165 register struct uba_device *ui; 166 { 167 register struct updevice *upaddr; 168 169 if (upwstart == 0) { 170 timeout(upwatch, (caddr_t)0, hz); 171 upwstart++; 172 } 173 if (ui->ui_dk >= 0) 174 dk_mspw[ui->ui_dk] = .0000020345; 175 upip[ui->ui_ctlr][ui->ui_slave] = ui; 176 up_softc[ui->ui_ctlr].sc_ndrive++; 177 upaddr = (struct updevice *)ui->ui_addr; 178 upaddr->upcs1 = 0; 179 upaddr->upcs2 = ui->ui_slave; 180 upaddr->uphr = UPHR_MAXTRAK; 181 if (upaddr->uphr == 9) 182 ui->ui_type = 1; /* fujitsu hack */ 183 else if (upaddr->uphr == 15) 184 ui->ui_type = 2; /* ampex hack */ 185 upaddr->upcs2 = UPCS2_CLR; 186 } 187 188 upopen(dev) 189 dev_t dev; 190 { 191 register int unit = minor(dev) >> 3; 192 register struct uba_device *ui; 193 194 if (unit >= NUP || (ui = updinfo[unit]) == 0 || ui->ui_alive == 0) 195 return (ENXIO); 196 return (0); 197 } 198 199 upstrategy(bp) 200 register struct buf *bp; 201 { 202 register struct uba_device *ui; 203 register struct upst *st; 204 register int unit; 205 register struct buf *dp; 206 int xunit = minor(bp->b_dev) & 07; 207 long bn, sz; 208 209 sz = (bp->b_bcount+511) >> 9; 210 unit = dkunit(bp); 211 if (unit >= NUP) 212 goto bad; 213 ui = updinfo[unit]; 214 if (ui == 0 || ui->ui_alive == 0) 215 goto bad; 216 st = &upst[ui->ui_type]; 217 if (bp->b_blkno < 0 || 218 (bn = dkblock(bp))+sz > st->sizes[xunit].nblocks) 219 goto bad; 220 bp->b_cylin = bn/st->nspc + st->sizes[xunit].cyloff; 221 (void) spl5(); 222 dp = &uputab[ui->ui_unit]; 223 disksort(dp, bp); 224 if (dp->b_active == 0) { 225 (void) upustart(ui); 226 bp = &ui->ui_mi->um_tab; 227 if (bp->b_actf && bp->b_active == 0) 228 (void) upstart(ui->ui_mi); 229 } 230 (void) spl0(); 231 return; 232 233 bad: 234 bp->b_flags |= B_ERROR; 235 iodone(bp); 236 return; 237 } 238 239 /* 240 * Unit start routine. 241 * Seek the drive to be where the data is 242 * and then generate another interrupt 243 * to actually start the transfer. 244 * If there is only one drive on the controller, 245 * or we are very close to the data, don't 246 * bother with the search. If called after 247 * searching once, don't bother to look where 248 * we are, just queue for transfer (to avoid 249 * positioning forever without transferrring.) 250 */ 251 upustart(ui) 252 register struct uba_device *ui; 253 { 254 register struct buf *bp, *dp; 255 register struct uba_ctlr *um; 256 register struct updevice *upaddr; 257 register struct upst *st; 258 daddr_t bn; 259 int sn, csn; 260 /* 261 * The SC21 cancels commands if you just say 262 * cs1 = UP_IE 263 * so we are cautious about handling of cs1. 264 * Also don't bother to clear as bits other than in upintr(). 265 */ 266 int didie = 0; 267 268 if (ui == 0) 269 return (0); 270 um = ui->ui_mi; 271 dk_busy &= ~(1<<ui->ui_dk); 272 dp = &uputab[ui->ui_unit]; 273 if ((bp = dp->b_actf) == NULL) 274 goto out; 275 /* 276 * If the controller is active, just remember 277 * that this device would like to be positioned... 278 * if we tried to position now we would confuse the SC21. 279 */ 280 if (um->um_tab.b_active) { 281 up_softc[um->um_ctlr].sc_softas |= 1<<ui->ui_slave; 282 return (0); 283 } 284 /* 285 * If we have already positioned this drive, 286 * then just put it on the ready queue. 287 */ 288 if (dp->b_active) 289 goto done; 290 dp->b_active = 1; 291 upaddr = (struct updevice *)um->um_addr; 292 upaddr->upcs2 = ui->ui_slave; 293 /* 294 * If drive has just come up, 295 * setup the pack. 296 */ 297 if ((upaddr->upds & UPDS_VV) == 0 || upinit[ui->ui_unit] == 0) { 298 struct buf *bbp = &bupbuf[ui->ui_unit]; 299 300 /* SHOULD WARN SYSTEM THAT THIS HAPPENED */ 301 upinit[ui->ui_unit] = 1; 302 upaddr->upcs1 = UP_IE|UP_DCLR|UP_GO; 303 upaddr->upcs1 = UP_IE|UP_PRESET|UP_GO; 304 upaddr->upof = UPOF_FMT22; 305 didie = 1; 306 st = &upst[ui->ui_type]; 307 bbp->b_flags = B_READ|B_BUSY; 308 bbp->b_dev = bp->b_dev; 309 bbp->b_bcount = 512; 310 bbp->b_un.b_addr = (caddr_t)&upbad[ui->ui_unit]; 311 bbp->b_blkno = st->ncyl * st->nspc - st->nsect; 312 bbp->b_cylin = st->ncyl - 1; 313 dp->b_actf = bbp; 314 bbp->av_forw = bp; 315 bp = bbp; 316 } 317 /* 318 * If drive is offline, forget about positioning. 319 */ 320 if ((upaddr->upds & (UPDS_DPR|UPDS_MOL)) != (UPDS_DPR|UPDS_MOL)) 321 goto done; 322 /* 323 * If there is only one drive, 324 * dont bother searching. 325 */ 326 if (up_softc[um->um_ctlr].sc_ndrive == 1) 327 goto done; 328 /* 329 * Figure out where this transfer is going to 330 * and see if we are close enough to justify not searching. 331 */ 332 st = &upst[ui->ui_type]; 333 bn = dkblock(bp); 334 sn = bn%st->nspc; 335 sn = (sn + st->nsect - upSDIST) % st->nsect; 336 if (bp->b_cylin - upaddr->updc) 337 goto search; /* Not on-cylinder */ 338 else if (upseek) 339 goto done; /* Ok just to be on-cylinder */ 340 csn = (upaddr->upla>>6) - sn - 1; 341 if (csn < 0) 342 csn += st->nsect; 343 if (csn > st->nsect - upRDIST) 344 goto done; 345 search: 346 upaddr->updc = bp->b_cylin; 347 /* 348 * Not on cylinder at correct position, 349 * seek/search. 350 */ 351 if (upseek) 352 upaddr->upcs1 = UP_IE|UP_SEEK|UP_GO; 353 else { 354 upaddr->upda = sn; 355 upaddr->upcs1 = UP_IE|UP_SEARCH|UP_GO; 356 } 357 didie = 1; 358 /* 359 * Mark unit busy for iostat. 360 */ 361 if (ui->ui_dk >= 0) { 362 dk_busy |= 1<<ui->ui_dk; 363 dk_seek[ui->ui_dk]++; 364 } 365 goto out; 366 done: 367 /* 368 * Device is ready to go. 369 * Put it on the ready queue for the controller 370 * (unless its already there.) 371 */ 372 if (dp->b_active != 2) { 373 dp->b_forw = NULL; 374 if (um->um_tab.b_actf == NULL) 375 um->um_tab.b_actf = dp; 376 else 377 um->um_tab.b_actl->b_forw = dp; 378 um->um_tab.b_actl = dp; 379 dp->b_active = 2; 380 } 381 out: 382 return (didie); 383 } 384 385 /* 386 * Start up a transfer on a drive. 387 */ 388 upstart(um) 389 register struct uba_ctlr *um; 390 { 391 register struct buf *bp, *dp; 392 register struct uba_device *ui; 393 register struct updevice *upaddr; 394 struct upst *st; 395 daddr_t bn; 396 int dn, sn, tn, cmd, waitdry; 397 398 loop: 399 /* 400 * Pull a request off the controller queue 401 */ 402 if ((dp = um->um_tab.b_actf) == NULL) 403 return (0); 404 if ((bp = dp->b_actf) == NULL) { 405 um->um_tab.b_actf = dp->b_forw; 406 goto loop; 407 } 408 /* 409 * Mark controller busy, and 410 * determine destination of this request. 411 */ 412 um->um_tab.b_active++; 413 ui = updinfo[dkunit(bp)]; 414 bn = dkblock(bp); 415 dn = ui->ui_slave; 416 st = &upst[ui->ui_type]; 417 sn = bn%st->nspc; 418 tn = sn/st->nsect; 419 sn %= st->nsect; 420 upaddr = (struct updevice *)ui->ui_addr; 421 /* 422 * Select drive if not selected already. 423 */ 424 if ((upaddr->upcs2&07) != dn) 425 upaddr->upcs2 = dn; 426 /* 427 * Check that it is ready and online 428 */ 429 waitdry = 0; 430 while ((upaddr->upds&UPDS_DRY) == 0) { 431 printf("up%d: ds wait ds=%o\n",dkunit(bp),upaddr->upds); 432 if (++waitdry > 512) 433 break; 434 upwaitdry++; 435 } 436 if ((upaddr->upds & UPDS_DREADY) != UPDS_DREADY) { 437 printf("up%d: not ready", dkunit(bp)); 438 if ((upaddr->upds & UPDS_DREADY) != UPDS_DREADY) { 439 printf("\n"); 440 um->um_tab.b_active = 0; 441 um->um_tab.b_errcnt = 0; 442 dp->b_actf = bp->av_forw; 443 dp->b_active = 0; 444 bp->b_flags |= B_ERROR; 445 iodone(bp); 446 goto loop; 447 } 448 /* 449 * Oh, well, sometimes this 450 * happens, for reasons unknown. 451 */ 452 printf(" (flakey)\n"); 453 } 454 /* 455 * Setup for the transfer, and get in the 456 * UNIBUS adaptor queue. 457 */ 458 upaddr->updc = bp->b_cylin; 459 upaddr->upda = (tn << 8) + sn; 460 upaddr->upwc = -bp->b_bcount / sizeof (short); 461 if (bp->b_flags & B_READ) 462 cmd = UP_IE|UP_RCOM|UP_GO; 463 else 464 cmd = UP_IE|UP_WCOM|UP_GO; 465 um->um_cmd = cmd; 466 (void) ubago(ui); 467 return (1); 468 } 469 470 /* 471 * Now all ready to go, stuff the registers. 472 */ 473 updgo(um) 474 struct uba_ctlr *um; 475 { 476 register struct updevice *upaddr = (struct updevice *)um->um_addr; 477 478 um->um_tab.b_active = 2; /* should now be 2 */ 479 upaddr->upba = um->um_ubinfo; 480 upaddr->upcs1 = um->um_cmd|((um->um_ubinfo>>8)&0x300); 481 } 482 483 /* 484 * Handle a disk interrupt. 485 */ 486 upintr(sc21) 487 register sc21; 488 { 489 register struct buf *bp, *dp; 490 register struct uba_ctlr *um = upminfo[sc21]; 491 register struct uba_device *ui; 492 register struct updevice *upaddr = (struct updevice *)um->um_addr; 493 register unit; 494 struct up_softc *sc = &up_softc[um->um_ctlr]; 495 int as = (upaddr->upas & 0377) | sc->sc_softas; 496 int needie = 1, waitdry; 497 498 sc->sc_wticks = 0; 499 sc->sc_softas = 0; 500 /* 501 * If controller wasn't transferring, then this is an 502 * interrupt for attention status on seeking drives. 503 * Just service them. 504 */ 505 if (um->um_tab.b_active != 2 && !sc->sc_recal) { 506 if (upaddr->upcs1 & UP_TRE) 507 upaddr->upcs1 = UP_TRE; 508 goto doattn; 509 } 510 um->um_tab.b_active = 1; 511 /* 512 * Get device and block structures, and a pointer 513 * to the uba_device for the drive. Select the drive. 514 */ 515 dp = um->um_tab.b_actf; 516 bp = dp->b_actf; 517 ui = updinfo[dkunit(bp)]; 518 dk_busy &= ~(1 << ui->ui_dk); 519 if ((upaddr->upcs2&07) != ui->ui_slave) 520 upaddr->upcs2 = ui->ui_slave; 521 if (bp->b_flags&B_BAD) { 522 if (upecc(ui, CONT)) 523 return; 524 } 525 /* 526 * Check for and process errors on 527 * either the drive or the controller. 528 */ 529 if ((upaddr->upds&UPDS_ERR) || (upaddr->upcs1&UP_TRE)) { 530 waitdry = 0; 531 while ((upaddr->upds & UPDS_DRY) == 0) { 532 if (++waitdry > 512) 533 break; 534 upwaitdry++; 535 } 536 if (upaddr->uper1&UPER1_WLE) { 537 /* 538 * Give up on write locked devices 539 * immediately. 540 */ 541 printf("up%d: write locked\n", dkunit(bp)); 542 bp->b_flags |= B_ERROR; 543 } else if (++um->um_tab.b_errcnt > 27) { 544 /* 545 * After 28 retries (16 without offset, and 546 * 12 with offset positioning) give up. 547 * If the error was header CRC, the header is 548 * screwed up, and the sector may in fact exist 549 * in the bad sector table, better check... 550 */ 551 if (upaddr->uper1&UPER1_HCRC) { 552 if (upecc(ui, BSE)) 553 return; 554 } 555 hard: 556 harderr(bp, "up"); 557 printf("cn=%d tn=%d sn=%d cs2=%b er1=%b er2=%b\n", 558 upaddr->updc, ((upaddr->upda)>>8)&077, 559 (upaddr->upda)&037, 560 upaddr->upcs2, UPCS2_BITS, 561 upaddr->uper1, UPER1_BITS, 562 upaddr->uper2, UPER2_BITS); 563 bp->b_flags |= B_ERROR; 564 } else if (upaddr->uper2 & UPER2_BSE) { 565 if (upecc(ui, BSE)) 566 return; 567 else 568 goto hard; 569 } else { 570 /* 571 * Retriable error. 572 * If a soft ecc, correct it (continuing 573 * by returning if necessary. 574 * Otherwise fall through and retry the transfer 575 */ 576 if ((upaddr->uper1&(UPER1_DCK|UPER1_ECH))==UPER1_DCK) { 577 if (upecc(ui, ECC)) 578 return; 579 } else 580 um->um_tab.b_active = 0; /* force retry */ 581 } 582 /* 583 * Clear drive error and, every eight attempts, 584 * (starting with the fourth) 585 * recalibrate to clear the slate. 586 */ 587 upaddr->upcs1 = UP_TRE|UP_IE|UP_DCLR|UP_GO; 588 needie = 0; 589 if ((um->um_tab.b_errcnt&07) == 4 && um->um_tab.b_active == 0) { 590 upaddr->upcs1 = UP_RECAL|UP_IE|UP_GO; 591 sc->sc_recal = 0; 592 goto nextrecal; 593 } 594 } 595 /* 596 * Advance recalibration finite state machine 597 * if recalibrate in progress, through 598 * RECAL 599 * SEEK 600 * OFFSET (optional) 601 * RETRY 602 */ 603 switch (sc->sc_recal) { 604 605 case 1: 606 upaddr->updc = bp->b_cylin; 607 upaddr->upcs1 = UP_SEEK|UP_IE|UP_GO; 608 goto nextrecal; 609 case 2: 610 if (um->um_tab.b_errcnt < 16 || (bp->b_flags&B_READ) == 0) 611 goto donerecal; 612 upaddr->upof = up_offset[um->um_tab.b_errcnt & 017] | UPOF_FMT22; 613 upaddr->upcs1 = UP_IE|UP_OFFSET|UP_GO; 614 goto nextrecal; 615 nextrecal: 616 sc->sc_recal++; 617 um->um_tab.b_active = 1; 618 return; 619 donerecal: 620 case 3: 621 sc->sc_recal = 0; 622 um->um_tab.b_active = 0; 623 break; 624 } 625 /* 626 * If still ``active'', then don't need any more retries. 627 */ 628 if (um->um_tab.b_active) { 629 /* 630 * If we were offset positioning, 631 * return to centerline. 632 */ 633 if (um->um_tab.b_errcnt >= 16) { 634 upaddr->upof = UPOF_FMT22; 635 upaddr->upcs1 = UP_RTC|UP_GO|UP_IE; 636 while (upaddr->upds & UPDS_PIP) 637 DELAY(25); 638 needie = 0; 639 } 640 um->um_tab.b_active = 0; 641 um->um_tab.b_errcnt = 0; 642 um->um_tab.b_actf = dp->b_forw; 643 dp->b_active = 0; 644 dp->b_errcnt = 0; 645 dp->b_actf = bp->av_forw; 646 bp->b_resid = (-upaddr->upwc * sizeof(short)); 647 iodone(bp); 648 /* 649 * If this unit has more work to do, 650 * then start it up right away. 651 */ 652 if (dp->b_actf) 653 if (upustart(ui)) 654 needie = 0; 655 } 656 as &= ~(1<<ui->ui_slave); 657 /* 658 * Release unibus resources and flush data paths. 659 */ 660 ubadone(um); 661 doattn: 662 /* 663 * Process other units which need attention. 664 * For each unit which needs attention, call 665 * the unit start routine to place the slave 666 * on the controller device queue. 667 */ 668 while (unit = ffs(as)) { 669 unit--; /* was 1 origin */ 670 as &= ~(1<<unit); 671 upaddr->upas = 1<<unit; 672 if (unit < UPIPUNITS && upustart(upip[sc21][unit])) 673 needie = 0; 674 } 675 /* 676 * If the controller is not transferring, but 677 * there are devices ready to transfer, start 678 * the controller. 679 */ 680 if (um->um_tab.b_actf && um->um_tab.b_active == 0) 681 if (upstart(um)) 682 needie = 0; 683 if (needie) 684 upaddr->upcs1 = UP_IE; 685 } 686 687 upread(dev, uio) 688 dev_t dev; 689 struct uio *uio; 690 { 691 register int unit = minor(dev) >> 3; 692 693 if (unit >= NUP) 694 return (ENXIO); 695 return (physio(upstrategy, &rupbuf[unit], dev, B_READ, minphys, uio)); 696 } 697 698 upwrite(dev, uio) 699 dev_t dev; 700 struct uio *uio; 701 { 702 register int unit = minor(dev) >> 3; 703 704 if (unit >= NUP) 705 return (ENXIO); 706 return (physio(upstrategy, &rupbuf[unit], dev, B_WRITE, minphys, uio)); 707 } 708 709 /* 710 * Correct an ECC error, and restart the i/o to complete 711 * the transfer if necessary. This is quite complicated because 712 * the transfer may be going to an odd memory address base and/or 713 * across a page boundary. 714 */ 715 upecc(ui, flag) 716 register struct uba_device *ui; 717 int flag; 718 { 719 register struct updevice *up = (struct updevice *)ui->ui_addr; 720 register struct buf *bp = uputab[ui->ui_unit].b_actf; 721 register struct uba_ctlr *um = ui->ui_mi; 722 register struct upst *st; 723 struct uba_regs *ubp = ui->ui_hd->uh_uba; 724 register int i; 725 caddr_t addr; 726 int reg, bit, byte, npf, mask, o, cmd, ubaddr; 727 int bn, cn, tn, sn; 728 729 /* 730 * Npf is the number of sectors transferred before the sector 731 * containing the ECC error, and reg is the UBA register 732 * mapping (the first part of) the transfer. 733 * O is offset within a memory page of the first byte transferred. 734 */ 735 if (flag == CONT) 736 npf = bp->b_error; 737 else 738 npf = btop((up->upwc * sizeof(short)) + bp->b_bcount); 739 reg = btop(um->um_ubinfo&0x3ffff) + npf; 740 o = (int)bp->b_un.b_addr & PGOFSET; 741 mask = up->upec2; 742 #ifdef UPECCDEBUG 743 printf("npf %d reg %x o %d mask %o pos %d\n", npf, reg, o, mask, 744 up->upec1); 745 #endif 746 bn = dkblock(bp); 747 st = &upst[ui->ui_type]; 748 cn = bp->b_cylin; 749 sn = bn%st->nspc + npf; 750 tn = sn/st->nsect; 751 sn %= st->nsect; 752 cn += tn/st->ntrak; 753 tn %= st->ntrak; 754 ubapurge(um); 755 um->um_tab.b_active=2; 756 /* 757 * action taken depends on the flag 758 */ 759 switch(flag){ 760 case ECC: 761 npf--; 762 reg--; 763 mask = up->upec2; 764 printf("up%d%c: soft ecc sn%d\n", dkunit(bp), 765 'a'+(minor(bp->b_dev)&07), bp->b_blkno + npf); 766 /* 767 * Flush the buffered data path, and compute the 768 * byte and bit position of the error. The variable i 769 * is the byte offset in the transfer, the variable byte 770 * is the offset from a page boundary in main memory. 771 */ 772 i = up->upec1 - 1; /* -1 makes 0 origin */ 773 bit = i&07; 774 i = (i&~07)>>3; 775 byte = i + o; 776 /* 777 * Correct while possible bits remain of mask. Since mask 778 * contains 11 bits, we continue while the bit offset is > -11. 779 * Also watch out for end of this block and the end of the whole 780 * transfer. 781 */ 782 while (i < 512 && (int)ptob(npf)+i < bp->b_bcount && bit > -11) { 783 addr = ptob(ubp->uba_map[reg+btop(byte)].pg_pfnum)+ 784 (byte & PGOFSET); 785 #ifdef UPECCDEBUG 786 printf("addr %x map reg %x\n", 787 addr, *(int *)(&ubp->uba_map[reg+btop(byte)])); 788 printf("old: %x, ", getmemc(addr)); 789 #endif 790 putmemc(addr, getmemc(addr)^(mask<<bit)); 791 #ifdef UPECCDEBUG 792 printf("new: %x\n", getmemc(addr)); 793 #endif 794 byte++; 795 i++; 796 bit -= 8; 797 } 798 if (up->upwc == 0) 799 return (0); 800 npf++; 801 reg++; 802 break; 803 case BSE: 804 /* 805 * if not in bad sector table, return 0 806 */ 807 if ((bn = isbad(&upbad[ui->ui_unit], cn, tn, sn)) < 0) 808 return(0); 809 /* 810 * flag this one as bad 811 */ 812 bp->b_flags |= B_BAD; 813 bp->b_error = npf + 1; 814 #ifdef UPECCDEBUG 815 printf("BSE: restart at %d\n",npf+1); 816 #endif 817 bn = st->ncyl * st->nspc -st->nsect - 1 - bn; 818 cn = bn / st->nspc; 819 sn = bn % st->nspc; 820 tn = sn / st->nsect; 821 sn %= st->nsect; 822 up->upwc = -(512 / sizeof (short)); 823 #ifdef UPECCDEBUG 824 printf("revector to cn %d tn %d sn %d\n", cn, tn, sn); 825 #endif 826 break; 827 case CONT: 828 #ifdef UPECCDEBUG 829 printf("upecc, CONT: bn %d cn %d tn %d sn %d\n", bn, cn, tn, sn); 830 #endif 831 bp->b_flags &= ~B_BAD; 832 up->upwc = -((bp->b_bcount - (int)ptob(npf)) / sizeof(short)); 833 if (up->upwc == 0) 834 return(0); 835 break; 836 } 837 if (up->upwc == 0) { 838 um->um_tab.b_active = 0; 839 return (0); 840 } 841 /* 842 * Have to continue the transfer... clear the drive, 843 * and compute the position where the transfer is to continue. 844 * We have completed npf+1 sectors of the transfer already; 845 * restart at offset o of next sector (i.e. in UBA register reg+1). 846 */ 847 #ifdef notdef 848 up->uper1 = 0; 849 up->upcs1 |= UP_GO; 850 #else 851 up->upcs1 = UP_TRE|UP_IE|UP_DCLR|UP_GO; 852 up->updc = cn; 853 up->upda = (tn << 8) | sn; 854 ubaddr = (int)ptob(reg) + o; 855 up->upba = ubaddr; 856 cmd = (ubaddr >> 8) & 0x300; 857 cmd |= ((bp->b_flags&B_READ)?UP_RCOM:UP_WCOM)|UP_IE|UP_GO; 858 um->um_tab.b_errcnt = 0; 859 up->upcs1 = cmd; 860 #endif 861 return (1); 862 } 863 864 /* 865 * Reset driver after UBA init. 866 * Cancel software state of all pending transfers 867 * and restart all units and the controller. 868 */ 869 upreset(uban) 870 int uban; 871 { 872 register struct uba_ctlr *um; 873 register struct uba_device *ui; 874 register sc21, unit; 875 876 for (sc21 = 0; sc21 < NSC; sc21++) { 877 if ((um = upminfo[sc21]) == 0 || um->um_ubanum != uban || 878 um->um_alive == 0) 879 continue; 880 printf(" sc%d", sc21); 881 um->um_tab.b_active = 0; 882 um->um_tab.b_actf = um->um_tab.b_actl = 0; 883 up_softc[sc21].sc_recal = 0; 884 up_softc[sc21].sc_wticks = 0; 885 if (um->um_ubinfo) { 886 printf("<%d>", (um->um_ubinfo>>28)&0xf); 887 um->um_ubinfo = 0; 888 } 889 ((struct updevice *)(um->um_addr))->upcs2 = UPCS2_CLR; 890 for (unit = 0; unit < NUP; unit++) { 891 if ((ui = updinfo[unit]) == 0) 892 continue; 893 if (ui->ui_alive == 0 || ui->ui_mi != um) 894 continue; 895 uputab[unit].b_active = 0; 896 (void) upustart(ui); 897 } 898 (void) upstart(um); 899 } 900 } 901 902 /* 903 * Wake up every second and if an interrupt is pending 904 * but nothing has happened increment a counter. 905 * If nothing happens for 20 seconds, reset the UNIBUS 906 * and begin anew. 907 */ 908 upwatch() 909 { 910 register struct uba_ctlr *um; 911 register sc21, unit; 912 register struct up_softc *sc; 913 914 timeout(upwatch, (caddr_t)0, hz); 915 for (sc21 = 0; sc21 < NSC; sc21++) { 916 um = upminfo[sc21]; 917 if (um == 0 || um->um_alive == 0) 918 continue; 919 sc = &up_softc[sc21]; 920 if (um->um_tab.b_active == 0) { 921 for (unit = 0; unit < NUP; unit++) 922 if (uputab[unit].b_active && 923 updinfo[unit]->ui_mi == um) 924 goto active; 925 sc->sc_wticks = 0; 926 continue; 927 } 928 active: 929 sc->sc_wticks++; 930 if (sc->sc_wticks >= 20) { 931 sc->sc_wticks = 0; 932 printf("sc%d: lost interrupt\n", sc21); 933 ubareset(um->um_ubanum); 934 } 935 } 936 } 937 938 #define DBSIZE 20 939 940 updump(dev) 941 dev_t dev; 942 { 943 struct updevice *upaddr; 944 char *start; 945 int num, blk, unit; 946 struct size *sizes; 947 register struct uba_regs *uba; 948 register struct uba_device *ui; 949 register short *rp; 950 struct upst *st; 951 register int retry; 952 953 unit = minor(dev) >> 3; 954 if (unit >= NUP) 955 return (ENXIO); 956 #define phys(cast, addr) ((cast)((int)addr & 0x7fffffff)) 957 ui = phys(struct uba_device *, updinfo[unit]); 958 if (ui->ui_alive == 0) 959 return (ENXIO); 960 uba = phys(struct uba_hd *, ui->ui_hd)->uh_physuba; 961 ubainit(uba); 962 upaddr = (struct updevice *)ui->ui_physaddr; 963 DELAY(5000000); 964 num = maxfree; 965 upaddr->upcs2 = unit; 966 DELAY(100); 967 upaddr->upcs1 = UP_DCLR|UP_GO; 968 upaddr->upcs1 = UP_PRESET|UP_GO; 969 upaddr->upof = UPOF_FMT22; 970 retry = 0; 971 do { 972 DELAY(25); 973 if (++retry > 527) 974 break; 975 } while ((upaddr->upds & UP_RDY) == 0); 976 if ((upaddr->upds & UPDS_DREADY) != UPDS_DREADY) 977 return (EFAULT); 978 start = 0; 979 st = &upst[ui->ui_type]; 980 sizes = phys(struct size *, st->sizes); 981 if (dumplo < 0 || dumplo + num >= sizes[minor(dev)&07].nblocks) 982 return (EINVAL); 983 while (num > 0) { 984 register struct pte *io; 985 register int i; 986 int cn, sn, tn; 987 daddr_t bn; 988 989 blk = num > DBSIZE ? DBSIZE : num; 990 io = uba->uba_map; 991 for (i = 0; i < blk; i++) 992 *(int *)io++ = (btop(start)+i) | (1<<21) | UBAMR_MRV; 993 *(int *)io = 0; 994 bn = dumplo + btop(start); 995 cn = bn/st->nspc + sizes[minor(dev)&07].cyloff; 996 sn = bn%st->nspc; 997 tn = sn/st->nsect; 998 sn = sn%st->nsect; 999 upaddr->updc = cn; 1000 rp = (short *) &upaddr->upda; 1001 *rp = (tn << 8) + sn; 1002 *--rp = 0; 1003 *--rp = -blk*NBPG / sizeof (short); 1004 *--rp = UP_GO|UP_WCOM; 1005 retry = 0; 1006 do { 1007 DELAY(25); 1008 if (++retry > 527) 1009 break; 1010 } while ((upaddr->upcs1 & UP_RDY) == 0); 1011 if ((upaddr->upds & UPDS_DREADY) != UPDS_DREADY) { 1012 printf("up%d: not ready", unit); 1013 if ((upaddr->upds & UPDS_DREADY) != UPDS_DREADY) { 1014 printf("\n"); 1015 return (EIO); 1016 } 1017 printf(" (flakey)\n"); 1018 } 1019 if (upaddr->upds&UPDS_ERR) 1020 return (EIO); 1021 start += blk*NBPG; 1022 num -= blk; 1023 } 1024 return (0); 1025 } 1026 #endif 1027