1 /* 2 * Copyright (c) 1982, 1986 Regents of the University of California. 3 * All rights reserved. The Berkeley software License Agreement 4 * specifies the terms and conditions for redistribution. 5 * 6 * @(#)up.c 7.3 (Berkeley) 05/06/88 7 */ 8 9 #include "up.h" 10 #if NSC > 0 11 /* 12 * UNIBUS disk driver with: 13 * overlapped seeks, 14 * ECC recovery, and 15 * bad sector forwarding. 16 * 17 * TODO: 18 * Check that offset recovery code works 19 */ 20 #include "../machine/pte.h" 21 22 #include "param.h" 23 #include "systm.h" 24 #include "dkstat.h" 25 #include "dkbad.h" 26 #include "buf.h" 27 #include "conf.h" 28 #include "dir.h" 29 #include "user.h" 30 #include "map.h" 31 #include "vm.h" 32 #include "cmap.h" 33 #include "uio.h" 34 #include "kernel.h" 35 #include "syslog.h" 36 37 #include "../vax/cpu.h" 38 #include "../vax/nexus.h" 39 #include "ubavar.h" 40 #include "ubareg.h" 41 #include "upreg.h" 42 43 struct up_softc { 44 int sc_softas; 45 int sc_ndrive; 46 int sc_wticks; 47 int sc_recal; 48 } up_softc[NSC]; 49 50 #define upunit(dev) (minor(dev) >> 3) 51 52 /* THIS SHOULD BE READ OFF THE PACK, PER DRIVE */ 53 struct size { 54 daddr_t nblocks; 55 int cyloff; 56 } up9300_sizes[8] = { 57 15884, 0, /* A=cyl 0 thru 26 */ 58 33440, 27, /* B=cyl 27 thru 81 */ 59 495520, 0, /* C=cyl 0 thru 814 */ 60 15884, 562, /* D=cyl 562 thru 588 */ 61 55936, 589, /* E=cyl 589 thru 680 */ 62 81376, 681, /* F=cyl 681 thru 814 */ 63 153728, 562, /* G=cyl 562 thru 814 */ 64 291346, 82, /* H=cyl 82 thru 561 */ 65 }, up9766_sizes[8] = { 66 15884, 0, /* A=cyl 0 thru 26 */ 67 33440, 27, /* B=cyl 27 thru 81 */ 68 500384, 0, /* C=cyl 0 thru 822 */ 69 15884, 562, /* D=cyl 562 thru 588 */ 70 55936, 589, /* E=cyl 589 thru 680 */ 71 86240, 681, /* F=cyl 681 thru 822 */ 72 158592, 562, /* G=cyl 562 thru 822 */ 73 291346, 82, /* H=cyl 82 thru 561 */ 74 }, up160_sizes[8] = { 75 15884, 0, /* A=cyl 0 thru 49 */ 76 33440, 50, /* B=cyl 50 thru 154 */ 77 263360, 0, /* C=cyl 0 thru 822 */ 78 15884, 155, /* D=cyl 155 thru 204 */ 79 55936, 205, /* E=cyl 205 thru 379 */ 80 141664, 380, /* F=cyl 380 thru 822 */ 81 213664, 155, /* G=cyl 155 thru 822 */ 82 0, 0, 83 }, upam_sizes[8] = { 84 15884, 0, /* A=cyl 0 thru 31 */ 85 33440, 32, /* B=cyl 32 thru 97 */ 86 524288, 0, /* C=cyl 0 thru 1023 */ 87 15884, 668, /* D=cyl 668 thru 699 */ 88 55936, 700, /* E=cyl 700 thru 809 */ 89 109472, 810, /* F=cyl 810 thru 1023 */ 90 182176, 668, /* G=cyl 668 thru 1023 */ 91 291346, 98, /* H=cyl 98 thru 667 */ 92 }, up980_sizes[8] = { 93 15884, 0, /* A=cyl 0 thru 99 */ 94 33440, 100, /* B=cyl 100 thru 308 */ 95 131680, 0, /* C=cyl 0 thru 822 */ 96 15884, 309, /* D=cyl 309 thru 408 */ 97 55936, 409, /* E=cyl 409 thru 758 */ 98 10080, 759, /* F=cyl 759 thru 822 */ 99 82080, 309, /* G=cyl 309 thru 822 */ 100 0, 0, 101 }, upeagle_sizes[8] = { 102 15884, 0, /* A=cyl 0 thru 16 */ 103 66880, 17, /* B=cyl 17 thru 86 */ 104 808320, 0, /* C=cyl 0 thru 841 */ 105 15884, 391, /* D=cyl 391 thru 407 */ 106 307200, 408, /* E=cyl 408 thru 727 */ 107 109296, 728, /* F=cyl 728 thru 841 */ 108 432816, 391, /* G=cyl 391 thru 841 */ 109 291346, 87, /* H=cyl 87 thru 390 */ 110 }; 111 /* END OF STUFF WHICH SHOULD BE READ IN PER DISK */ 112 113 int upprobe(), upslave(), upattach(), updgo(), upintr(); 114 struct uba_ctlr *upminfo[NSC]; 115 struct uba_device *updinfo[NUP]; 116 #define UPIPUNITS 8 117 struct uba_device *upip[NSC][UPIPUNITS]; /* fuji w/fixed head gives n,n+4 */ 118 119 u_short upstd[] = { 0776700, 0774400, 0776300, 0 }; 120 struct uba_driver scdriver = 121 { upprobe, upslave, upattach, updgo, upstd, "up", updinfo, "sc", upminfo }; 122 struct buf uputab[NUP]; 123 char upinit[NUP]; 124 125 struct upst { 126 short nsect; /* # sectors/track */ 127 short ntrak; /* # tracks/cylinder */ 128 short nspc; /* # sectors/cylinder */ 129 short ncyl; /* # cylinders */ 130 struct size *sizes; /* partition tables */ 131 short sdist; /* seek distance metric */ 132 short rdist; /* rotational distance metric */ 133 } upst[] = { 134 { 32, 19, 32*19, 815, up9300_sizes, 3, 4 }, /* 9300 */ 135 { 32, 19, 32*19, 823, up9766_sizes, 3, 4 }, /* 9766 */ 136 { 32, 10, 32*10, 823, up160_sizes, 3, 4 }, /* fuji 160m */ 137 { 32, 16, 32*16, 1024, upam_sizes, 7, 8 }, /* Capricorn */ 138 { 32, 5, 32*5, 823, up980_sizes, 3, 4 }, /* DM980 */ 139 { 48, 20, 48*20, 842, upeagle_sizes, 15, 8 }, /* EAGLE */ 140 { 0, 0, 0, 0, 0, 0, 0 } 141 }; 142 143 u_char up_offset[16] = { 144 UPOF_P400, UPOF_M400, UPOF_P400, UPOF_M400, 145 UPOF_P800, UPOF_M800, UPOF_P800, UPOF_M800, 146 UPOF_P1200, UPOF_M1200, UPOF_P1200, UPOF_M1200, 147 0, 0, 0, 0 148 }; 149 150 struct buf bupbuf[NUP]; 151 struct dkbad upbad[NUP]; 152 153 #define b_cylin b_resid 154 155 int upwstart, upwatch(); /* Have started guardian */ 156 int upseek; 157 int upwaitdry; 158 159 /*ARGSUSED*/ 160 upprobe(reg) 161 caddr_t reg; 162 { 163 register int br, cvec; 164 165 #ifdef lint 166 br = 0; cvec = br; br = cvec; upintr(0); 167 #endif 168 ((struct updevice *)reg)->upcs1 = UP_IE|UP_RDY; 169 DELAY(10); 170 ((struct updevice *)reg)->upcs1 = 0; 171 return (sizeof (struct updevice)); 172 } 173 174 upslave(ui, reg) 175 struct uba_device *ui; 176 caddr_t reg; 177 { 178 register struct updevice *upaddr = (struct updevice *)reg; 179 180 upaddr->upcs1 = 0; /* conservative */ 181 upaddr->upcs2 = ui->ui_slave; 182 upaddr->upcs1 = UP_NOP|UP_GO; 183 if (upaddr->upcs2&UPCS2_NED) { 184 upaddr->upcs1 = UP_DCLR|UP_GO; 185 return (0); 186 } 187 return (1); 188 } 189 190 upattach(ui) 191 register struct uba_device *ui; 192 { 193 194 if (upwstart == 0) { 195 timeout(upwatch, (caddr_t)0, hz); 196 upwstart++; 197 } 198 if (ui->ui_dk >= 0) 199 dk_mspw[ui->ui_dk] = .0000020345; 200 upip[ui->ui_ctlr][ui->ui_slave] = ui; 201 up_softc[ui->ui_ctlr].sc_ndrive++; 202 ui->ui_type = upmaptype(ui); 203 } 204 205 upmaptype(ui) 206 register struct uba_device *ui; 207 { 208 register struct updevice *upaddr = (struct updevice *)ui->ui_addr; 209 int type = ui->ui_type; 210 register struct upst *st; 211 212 upaddr->upcs1 = 0; 213 upaddr->upcs2 = ui->ui_slave; 214 upaddr->uphr = UPHR_MAXTRAK; 215 for (st = upst; st->nsect != 0; st++) 216 if (upaddr->uphr == st->ntrak - 1) { 217 type = st - upst; 218 break; 219 } 220 if (st->nsect == 0) 221 printf(": uphr=%x", ui->ui_slave, upaddr->uphr); 222 if (type == 0) { 223 upaddr->uphr = UPHR_MAXCYL; 224 if (upaddr->uphr == 822) 225 type++; 226 } 227 upaddr->upcs2 = UPCS2_CLR; 228 return (type); 229 } 230 231 upopen(dev) 232 dev_t dev; 233 { 234 register int unit = upunit(dev); 235 register struct uba_device *ui; 236 237 if (unit >= NUP || (ui = updinfo[unit]) == 0 || ui->ui_alive == 0) 238 return (ENXIO); 239 return (0); 240 } 241 242 upstrategy(bp) 243 register struct buf *bp; 244 { 245 register struct uba_device *ui; 246 register struct upst *st; 247 register int unit; 248 register struct buf *dp; 249 int xunit = minor(bp->b_dev) & 07; 250 long bn, sz; 251 int s; 252 253 sz = (bp->b_bcount+511) >> 9; 254 unit = upunit(bp->b_dev); 255 if (unit >= NUP) { 256 bp->b_error = ENXIO; 257 goto bad; 258 } 259 ui = updinfo[unit]; 260 if (ui == 0 || ui->ui_alive == 0) { 261 bp->b_error = ENXIO; 262 goto bad; 263 } 264 st = &upst[ui->ui_type]; 265 if (bp->b_blkno < 0 || 266 (bn = bp->b_blkno)+sz > st->sizes[xunit].nblocks) { 267 if (bp->b_blkno == st->sizes[xunit].nblocks) { 268 bp->b_resid = bp->b_bcount; 269 goto done; 270 } 271 bp->b_error = EINVAL; 272 goto bad; 273 } 274 bp->b_cylin = bn/st->nspc + st->sizes[xunit].cyloff; 275 s = spl5(); 276 dp = &uputab[ui->ui_unit]; 277 disksort(dp, bp); 278 if (dp->b_active == 0) { 279 (void) upustart(ui); 280 bp = &ui->ui_mi->um_tab; 281 if (bp->b_actf && bp->b_active == 0) 282 (void) upstart(ui->ui_mi); 283 } 284 splx(s); 285 return; 286 287 bad: 288 bp->b_flags |= B_ERROR; 289 done: 290 iodone(bp); 291 return; 292 } 293 294 /* 295 * Unit start routine. 296 * Seek the drive to be where the data is 297 * and then generate another interrupt 298 * to actually start the transfer. 299 * If there is only one drive on the controller, 300 * or we are very close to the data, don't 301 * bother with the search. If called after 302 * searching once, don't bother to look where 303 * we are, just queue for transfer (to avoid 304 * positioning forever without transferrring.) 305 */ 306 upustart(ui) 307 register struct uba_device *ui; 308 { 309 register struct buf *bp, *dp; 310 register struct uba_ctlr *um; 311 register struct updevice *upaddr; 312 register struct upst *st; 313 daddr_t bn; 314 int sn, csn; 315 /* 316 * The SC21 cancels commands if you just say 317 * cs1 = UP_IE 318 * so we are cautious about handling of cs1. 319 * Also don't bother to clear as bits other than in upintr(). 320 */ 321 int didie = 0; 322 323 if (ui == 0) 324 return (0); 325 um = ui->ui_mi; 326 dk_busy &= ~(1<<ui->ui_dk); 327 dp = &uputab[ui->ui_unit]; 328 if ((bp = dp->b_actf) == NULL) 329 goto out; 330 /* 331 * If the controller is active, just remember 332 * that this device would like to be positioned... 333 * if we tried to position now we would confuse the SC21. 334 */ 335 if (um->um_tab.b_active) { 336 up_softc[um->um_ctlr].sc_softas |= 1<<ui->ui_slave; 337 return (0); 338 } 339 /* 340 * If we have already positioned this drive, 341 * then just put it on the ready queue. 342 */ 343 if (dp->b_active) 344 goto done; 345 dp->b_active = 1; 346 upaddr = (struct updevice *)um->um_addr; 347 upaddr->upcs2 = ui->ui_slave; 348 /* 349 * If drive has just come up, 350 * setup the pack. 351 */ 352 if ((upaddr->upds & UPDS_VV) == 0 || upinit[ui->ui_unit] == 0) { 353 struct buf *bbp = &bupbuf[ui->ui_unit]; 354 355 /* SHOULD WARN SYSTEM THAT THIS HAPPENED */ 356 upinit[ui->ui_unit] = 1; 357 upaddr->upcs1 = UP_IE|UP_DCLR|UP_GO; 358 upaddr->upcs1 = UP_IE|UP_PRESET|UP_GO; 359 upaddr->upof = UPOF_FMT22; 360 didie = 1; 361 st = &upst[ui->ui_type]; 362 bbp->b_flags = B_READ|B_BUSY; 363 bbp->b_dev = bp->b_dev; 364 bbp->b_bcount = 512; 365 bbp->b_un.b_addr = (caddr_t)&upbad[ui->ui_unit]; 366 bbp->b_blkno = st->ncyl * st->nspc - st->nsect; 367 bbp->b_cylin = st->ncyl - 1; 368 dp->b_actf = bbp; 369 bbp->av_forw = bp; 370 bp = bbp; 371 } 372 /* 373 * If drive is offline, forget about positioning. 374 */ 375 if ((upaddr->upds & (UPDS_DPR|UPDS_MOL)) != (UPDS_DPR|UPDS_MOL)) 376 goto done; 377 /* 378 * If there is only one drive, 379 * dont bother searching. 380 */ 381 if (up_softc[um->um_ctlr].sc_ndrive == 1) 382 goto done; 383 /* 384 * Figure out where this transfer is going to 385 * and see if we are close enough to justify not searching. 386 */ 387 st = &upst[ui->ui_type]; 388 bn = bp->b_blkno; 389 sn = bn%st->nspc; 390 sn = (sn + st->nsect - st->sdist) % st->nsect; 391 if (bp->b_cylin - upaddr->updc) 392 goto search; /* Not on-cylinder */ 393 else if (upseek) 394 goto done; /* Ok just to be on-cylinder */ 395 csn = (upaddr->upla>>6) - sn - 1; 396 if (csn < 0) 397 csn += st->nsect; 398 if (csn > st->nsect - st->rdist) 399 goto done; 400 search: 401 upaddr->updc = bp->b_cylin; 402 /* 403 * Not on cylinder at correct position, 404 * seek/search. 405 */ 406 if (upseek) 407 upaddr->upcs1 = UP_IE|UP_SEEK|UP_GO; 408 else { 409 upaddr->upda = sn; 410 upaddr->upcs1 = UP_IE|UP_SEARCH|UP_GO; 411 } 412 didie = 1; 413 /* 414 * Mark unit busy for iostat. 415 */ 416 if (ui->ui_dk >= 0) { 417 dk_busy |= 1<<ui->ui_dk; 418 dk_seek[ui->ui_dk]++; 419 } 420 goto out; 421 done: 422 /* 423 * Device is ready to go. 424 * Put it on the ready queue for the controller 425 * (unless its already there.) 426 */ 427 if (dp->b_active != 2) { 428 dp->b_forw = NULL; 429 if (um->um_tab.b_actf == NULL) 430 um->um_tab.b_actf = dp; 431 else 432 um->um_tab.b_actl->b_forw = dp; 433 um->um_tab.b_actl = dp; 434 dp->b_active = 2; 435 } 436 out: 437 return (didie); 438 } 439 440 /* 441 * Start up a transfer on a drive. 442 */ 443 upstart(um) 444 register struct uba_ctlr *um; 445 { 446 register struct buf *bp, *dp; 447 register struct uba_device *ui; 448 register struct updevice *upaddr; 449 struct upst *st; 450 daddr_t bn; 451 int dn, sn, tn, cmd, waitdry; 452 453 loop: 454 /* 455 * Pull a request off the controller queue 456 */ 457 if ((dp = um->um_tab.b_actf) == NULL) 458 return (0); 459 if ((bp = dp->b_actf) == NULL) { 460 um->um_tab.b_actf = dp->b_forw; 461 goto loop; 462 } 463 /* 464 * Mark controller busy, and 465 * determine destination of this request. 466 */ 467 um->um_tab.b_active++; 468 ui = updinfo[upunit(bp->b_dev)]; 469 bn = bp->b_blkno; 470 dn = ui->ui_slave; 471 st = &upst[ui->ui_type]; 472 sn = bn%st->nspc; 473 tn = sn/st->nsect; 474 sn %= st->nsect; 475 upaddr = (struct updevice *)ui->ui_addr; 476 /* 477 * Select drive if not selected already. 478 */ 479 if ((upaddr->upcs2&07) != dn) 480 upaddr->upcs2 = dn; 481 /* 482 * Check that it is ready and online 483 */ 484 waitdry = 0; 485 while ((upaddr->upds&UPDS_DRY) == 0) { 486 printf("up%d: ds wait ds=%o\n",upunit(bp->b_dev),upaddr->upds); 487 if (++waitdry > 512) 488 break; 489 upwaitdry++; 490 } 491 if ((upaddr->upds & UPDS_DREADY) != UPDS_DREADY) { 492 printf("up%d: not ready", upunit(bp->b_dev)); 493 if ((upaddr->upds & UPDS_DREADY) != UPDS_DREADY) { 494 printf("\n"); 495 um->um_tab.b_active = 0; 496 um->um_tab.b_errcnt = 0; 497 dp->b_actf = bp->av_forw; 498 dp->b_active = 0; 499 bp->b_flags |= B_ERROR; 500 iodone(bp); 501 goto loop; 502 } 503 /* 504 * Oh, well, sometimes this 505 * happens, for reasons unknown. 506 */ 507 printf(" (flakey)\n"); 508 } 509 /* 510 * Setup for the transfer, and get in the 511 * UNIBUS adaptor queue. 512 */ 513 upaddr->updc = bp->b_cylin; 514 upaddr->upda = (tn << 8) + sn; 515 upaddr->upwc = -bp->b_bcount / sizeof (short); 516 if (bp->b_flags & B_READ) 517 cmd = UP_IE|UP_RCOM|UP_GO; 518 else 519 cmd = UP_IE|UP_WCOM|UP_GO; 520 um->um_cmd = cmd; 521 (void) ubago(ui); 522 return (1); 523 } 524 525 /* 526 * Now all ready to go, stuff the registers. 527 */ 528 updgo(um) 529 struct uba_ctlr *um; 530 { 531 register struct updevice *upaddr = (struct updevice *)um->um_addr; 532 533 um->um_tab.b_active = 2; /* should now be 2 */ 534 upaddr->upba = um->um_ubinfo; 535 upaddr->upcs1 = um->um_cmd|((um->um_ubinfo>>8)&0x300); 536 } 537 538 /* 539 * Handle a disk interrupt. 540 */ 541 upintr(sc21) 542 register sc21; 543 { 544 register struct buf *bp, *dp; 545 register struct uba_ctlr *um = upminfo[sc21]; 546 register struct uba_device *ui; 547 register struct updevice *upaddr = (struct updevice *)um->um_addr; 548 register unit; 549 struct up_softc *sc = &up_softc[um->um_ctlr]; 550 int as = (upaddr->upas & 0377) | sc->sc_softas; 551 int needie = 1, waitdry; 552 553 sc->sc_wticks = 0; 554 sc->sc_softas = 0; 555 /* 556 * If controller wasn't transferring, then this is an 557 * interrupt for attention status on seeking drives. 558 * Just service them. 559 */ 560 if (um->um_tab.b_active != 2 && !sc->sc_recal) { 561 if (upaddr->upcs1 & UP_TRE) 562 upaddr->upcs1 = UP_TRE; 563 goto doattn; 564 } 565 um->um_tab.b_active = 1; 566 /* 567 * Get device and block structures, and a pointer 568 * to the uba_device for the drive. Select the drive. 569 */ 570 dp = um->um_tab.b_actf; 571 bp = dp->b_actf; 572 ui = updinfo[upunit(bp->b_dev)]; 573 dk_busy &= ~(1 << ui->ui_dk); 574 if ((upaddr->upcs2&07) != ui->ui_slave) 575 upaddr->upcs2 = ui->ui_slave; 576 if (bp->b_flags&B_BAD) { 577 if (upecc(ui, CONT)) 578 return; 579 } 580 /* 581 * Check for and process errors on 582 * either the drive or the controller. 583 */ 584 if ((upaddr->upds&UPDS_ERR) || (upaddr->upcs1&UP_TRE)) { 585 waitdry = 0; 586 while ((upaddr->upds & UPDS_DRY) == 0) { 587 if (++waitdry > 512) 588 break; 589 upwaitdry++; 590 } 591 if (upaddr->uper1&UPER1_WLE) { 592 /* 593 * Give up on write locked devices 594 * immediately. 595 */ 596 printf("up%d: write locked\n", upunit(bp->b_dev)); 597 bp->b_flags |= B_ERROR; 598 } else if (++um->um_tab.b_errcnt > 27) { 599 /* 600 * After 28 retries (16 without offset, and 601 * 12 with offset positioning) give up. 602 * If the error was header CRC, the header is 603 * screwed up, and the sector may in fact exist 604 * in the bad sector table, better check... 605 */ 606 if (upaddr->uper1&UPER1_HCRC) { 607 if (upecc(ui, BSE)) 608 return; 609 } 610 hard: 611 harderr(bp, "up"); 612 printf("cn=%d tn=%d sn=%d cs2=%b er1=%b er2=%b\n", 613 upaddr->updc, ((upaddr->upda)>>8)&077, 614 (upaddr->upda)&037, 615 upaddr->upcs2, UPCS2_BITS, 616 upaddr->uper1, UPER1_BITS, 617 upaddr->uper2, UPER2_BITS); 618 bp->b_flags |= B_ERROR; 619 } else if (upaddr->uper2 & UPER2_BSE) { 620 if (upecc(ui, BSE)) 621 return; 622 else 623 goto hard; 624 } else { 625 /* 626 * Retriable error. 627 * If a soft ecc, correct it (continuing 628 * by returning if necessary. 629 * Otherwise fall through and retry the transfer 630 */ 631 if ((upaddr->uper1&(UPER1_DCK|UPER1_ECH))==UPER1_DCK) { 632 if (upecc(ui, ECC)) 633 return; 634 } else 635 um->um_tab.b_active = 0; /* force retry */ 636 } 637 /* 638 * Clear drive error and, every eight attempts, 639 * (starting with the fourth) 640 * recalibrate to clear the slate. 641 */ 642 upaddr->upcs1 = UP_TRE|UP_IE|UP_DCLR|UP_GO; 643 needie = 0; 644 if ((um->um_tab.b_errcnt&07) == 4 && um->um_tab.b_active == 0) { 645 upaddr->upcs1 = UP_RECAL|UP_IE|UP_GO; 646 sc->sc_recal = 0; 647 goto nextrecal; 648 } 649 } 650 /* 651 * Advance recalibration finite state machine 652 * if recalibrate in progress, through 653 * RECAL 654 * SEEK 655 * OFFSET (optional) 656 * RETRY 657 */ 658 switch (sc->sc_recal) { 659 660 case 1: 661 upaddr->updc = bp->b_cylin; 662 upaddr->upcs1 = UP_SEEK|UP_IE|UP_GO; 663 goto nextrecal; 664 case 2: 665 if (um->um_tab.b_errcnt < 16 || (bp->b_flags&B_READ) == 0) 666 goto donerecal; 667 upaddr->upof = up_offset[um->um_tab.b_errcnt & 017] | UPOF_FMT22; 668 upaddr->upcs1 = UP_IE|UP_OFFSET|UP_GO; 669 goto nextrecal; 670 nextrecal: 671 sc->sc_recal++; 672 um->um_tab.b_active = 1; 673 return; 674 donerecal: 675 case 3: 676 sc->sc_recal = 0; 677 um->um_tab.b_active = 0; 678 break; 679 } 680 /* 681 * If still ``active'', then don't need any more retries. 682 */ 683 if (um->um_tab.b_active) { 684 /* 685 * If we were offset positioning, 686 * return to centerline. 687 */ 688 if (um->um_tab.b_errcnt >= 16) { 689 upaddr->upof = UPOF_FMT22; 690 upaddr->upcs1 = UP_RTC|UP_GO|UP_IE; 691 while (upaddr->upds & UPDS_PIP) 692 DELAY(25); 693 needie = 0; 694 } 695 um->um_tab.b_active = 0; 696 um->um_tab.b_errcnt = 0; 697 um->um_tab.b_actf = dp->b_forw; 698 dp->b_active = 0; 699 dp->b_errcnt = 0; 700 dp->b_actf = bp->av_forw; 701 bp->b_resid = (-upaddr->upwc * sizeof(short)); 702 iodone(bp); 703 /* 704 * If this unit has more work to do, 705 * then start it up right away. 706 */ 707 if (dp->b_actf) 708 if (upustart(ui)) 709 needie = 0; 710 } 711 as &= ~(1<<ui->ui_slave); 712 /* 713 * Release unibus resources and flush data paths. 714 */ 715 ubadone(um); 716 doattn: 717 /* 718 * Process other units which need attention. 719 * For each unit which needs attention, call 720 * the unit start routine to place the slave 721 * on the controller device queue. 722 */ 723 while (unit = ffs((long)as)) { 724 unit--; /* was 1 origin */ 725 as &= ~(1<<unit); 726 upaddr->upas = 1<<unit; 727 if (unit < UPIPUNITS && upustart(upip[sc21][unit])) 728 needie = 0; 729 } 730 /* 731 * If the controller is not transferring, but 732 * there are devices ready to transfer, start 733 * the controller. 734 */ 735 if (um->um_tab.b_actf && um->um_tab.b_active == 0) 736 if (upstart(um)) 737 needie = 0; 738 if (needie) 739 upaddr->upcs1 = UP_IE; 740 } 741 742 /* 743 * Correct an ECC error, and restart the i/o to complete 744 * the transfer if necessary. This is quite complicated because 745 * the transfer may be going to an odd memory address base and/or 746 * across a page boundary. 747 */ 748 upecc(ui, flag) 749 register struct uba_device *ui; 750 int flag; 751 { 752 register struct updevice *up = (struct updevice *)ui->ui_addr; 753 register struct buf *bp = uputab[ui->ui_unit].b_actf; 754 register struct uba_ctlr *um = ui->ui_mi; 755 register struct upst *st; 756 struct uba_regs *ubp = ui->ui_hd->uh_uba; 757 register int i; 758 caddr_t addr; 759 int reg, bit, byte, npf, mask, o, cmd, ubaddr; 760 int bn, cn, tn, sn; 761 762 /* 763 * Npf is the number of sectors transferred before the sector 764 * containing the ECC error, and reg is the UBA register 765 * mapping (the first part of) the transfer. 766 * O is offset within a memory page of the first byte transferred. 767 */ 768 if (flag == CONT) 769 npf = bp->b_error; 770 else 771 npf = btodb(bp->b_bcount + (up->upwc * sizeof(short)) + 511); 772 reg = btop(um->um_ubinfo&0x3ffff) + npf; 773 o = (int)bp->b_un.b_addr & PGOFSET; 774 mask = up->upec2; 775 #ifdef UPECCDEBUG 776 printf("npf %d reg %x o %d mask %o pos %d\n", npf, reg, o, mask, 777 up->upec1); 778 #endif 779 bn = bp->b_blkno; 780 st = &upst[ui->ui_type]; 781 cn = bp->b_cylin; 782 sn = bn%st->nspc + npf; 783 tn = sn/st->nsect; 784 sn %= st->nsect; 785 cn += tn/st->ntrak; 786 tn %= st->ntrak; 787 ubapurge(um); 788 um->um_tab.b_active=2; 789 /* 790 * action taken depends on the flag 791 */ 792 switch(flag){ 793 case ECC: 794 npf--; 795 reg--; 796 mask = up->upec2; 797 log(LOG_WARNING, "up%d%c: soft ecc sn%d\n", upunit(bp->b_dev), 798 'a'+(minor(bp->b_dev)&07), bp->b_blkno + npf); 799 /* 800 * Flush the buffered data path, and compute the 801 * byte and bit position of the error. The variable i 802 * is the byte offset in the transfer, the variable byte 803 * is the offset from a page boundary in main memory. 804 */ 805 i = up->upec1 - 1; /* -1 makes 0 origin */ 806 bit = i&07; 807 i = (i&~07)>>3; 808 byte = i + o; 809 /* 810 * Correct while possible bits remain of mask. Since mask 811 * contains 11 bits, we continue while the bit offset is > -11. 812 * Also watch out for end of this block and the end of the whole 813 * transfer. 814 */ 815 while (i < 512 && (int)dbtob(npf)+i < bp->b_bcount && bit > -11) { 816 struct pte pte; 817 818 pte = ubp->uba_map[reg + btop(byte)]; 819 addr = ptob(pte.pg_pfnum) + (byte & PGOFSET); 820 #ifdef UPECCDEBUG 821 printf("addr %x map reg %x\n", 822 addr, *(int *)(&ubp->uba_map[reg+btop(byte)])); 823 printf("old: %x, ", getmemc(addr)); 824 #endif 825 putmemc(addr, getmemc(addr)^(mask<<bit)); 826 #ifdef UPECCDEBUG 827 printf("new: %x\n", getmemc(addr)); 828 #endif 829 byte++; 830 i++; 831 bit -= 8; 832 } 833 if (up->upwc == 0) 834 return (0); 835 npf++; 836 reg++; 837 break; 838 case BSE: 839 /* 840 * if not in bad sector table, return 0 841 */ 842 if ((bn = isbad(&upbad[ui->ui_unit], cn, tn, sn)) < 0) 843 return(0); 844 /* 845 * flag this one as bad 846 */ 847 bp->b_flags |= B_BAD; 848 bp->b_error = npf + 1; 849 #ifdef UPECCDEBUG 850 printf("BSE: restart at %d\n",npf+1); 851 #endif 852 bn = st->ncyl * st->nspc -st->nsect - 1 - bn; 853 cn = bn / st->nspc; 854 sn = bn % st->nspc; 855 tn = sn / st->nsect; 856 sn %= st->nsect; 857 up->upwc = -(512 / sizeof (short)); 858 #ifdef UPECCDEBUG 859 printf("revector to cn %d tn %d sn %d\n", cn, tn, sn); 860 #endif 861 break; 862 case CONT: 863 #ifdef UPECCDEBUG 864 printf("upecc, CONT: bn %d cn %d tn %d sn %d\n", bn, cn, tn, sn); 865 #endif 866 bp->b_flags &= ~B_BAD; 867 if ((int)dbtob(npf) >= bp->b_bcount) 868 return (0); 869 up->upwc = -((bp->b_bcount - (int)dbtob(npf)) / sizeof(short)); 870 break; 871 } 872 if (up->upwc == 0) { 873 um->um_tab.b_active = 0; 874 return (0); 875 } 876 /* 877 * Have to continue the transfer... clear the drive, 878 * and compute the position where the transfer is to continue. 879 * We have completed npf+1 sectors of the transfer already; 880 * restart at offset o of next sector (i.e. in UBA register reg+1). 881 */ 882 #ifdef notdef 883 up->uper1 = 0; 884 up->upcs1 |= UP_GO; 885 #else 886 up->upcs1 = UP_TRE|UP_IE|UP_DCLR|UP_GO; 887 up->updc = cn; 888 up->upda = (tn << 8) | sn; 889 ubaddr = (int)ptob(reg) + o; 890 up->upba = ubaddr; 891 cmd = (ubaddr >> 8) & 0x300; 892 cmd |= ((bp->b_flags&B_READ)?UP_RCOM:UP_WCOM)|UP_IE|UP_GO; 893 um->um_tab.b_errcnt = 0; 894 up->upcs1 = cmd; 895 #endif 896 return (1); 897 } 898 899 /* 900 * Reset driver after UBA init. 901 * Cancel software state of all pending transfers 902 * and restart all units and the controller. 903 */ 904 upreset(uban) 905 int uban; 906 { 907 register struct uba_ctlr *um; 908 register struct uba_device *ui; 909 register sc21, unit; 910 911 for (sc21 = 0; sc21 < NSC; sc21++) { 912 if ((um = upminfo[sc21]) == 0 || um->um_ubanum != uban || 913 um->um_alive == 0) 914 continue; 915 printf(" sc%d", sc21); 916 um->um_tab.b_active = 0; 917 um->um_tab.b_actf = um->um_tab.b_actl = 0; 918 up_softc[sc21].sc_recal = 0; 919 up_softc[sc21].sc_wticks = 0; 920 if (um->um_ubinfo) { 921 printf("<%d>", (um->um_ubinfo>>28)&0xf); 922 um->um_ubinfo = 0; 923 } 924 ((struct updevice *)(um->um_addr))->upcs2 = UPCS2_CLR; 925 for (unit = 0; unit < NUP; unit++) { 926 if ((ui = updinfo[unit]) == 0) 927 continue; 928 if (ui->ui_alive == 0 || ui->ui_mi != um) 929 continue; 930 uputab[unit].b_active = 0; 931 (void) upustart(ui); 932 } 933 (void) upstart(um); 934 } 935 } 936 937 /* 938 * Wake up every second and if an interrupt is pending 939 * but nothing has happened increment a counter. 940 * If nothing happens for 20 seconds, reset the UNIBUS 941 * and begin anew. 942 */ 943 upwatch() 944 { 945 register struct uba_ctlr *um; 946 register sc21, unit; 947 register struct up_softc *sc; 948 949 timeout(upwatch, (caddr_t)0, hz); 950 for (sc21 = 0; sc21 < NSC; sc21++) { 951 um = upminfo[sc21]; 952 if (um == 0 || um->um_alive == 0) 953 continue; 954 sc = &up_softc[sc21]; 955 if (um->um_tab.b_active == 0) { 956 for (unit = 0; unit < NUP; unit++) 957 if (uputab[unit].b_active && 958 updinfo[unit]->ui_mi == um) 959 goto active; 960 sc->sc_wticks = 0; 961 continue; 962 } 963 active: 964 sc->sc_wticks++; 965 if (sc->sc_wticks >= 20) { 966 sc->sc_wticks = 0; 967 printf("sc%d: lost interrupt\n", sc21); 968 ubareset(um->um_ubanum); 969 } 970 } 971 } 972 973 #define DBSIZE 20 974 975 updump(dev) 976 dev_t dev; 977 { 978 struct updevice *upaddr; 979 char *start; 980 int num, blk, unit; 981 struct size *sizes; 982 register struct uba_regs *uba; 983 register struct uba_device *ui; 984 register short *rp; 985 struct upst *st; 986 register int retry; 987 988 unit = upunit(dev); 989 if (unit >= NUP) 990 return (ENXIO); 991 #define phys(cast, addr) ((cast)((int)addr & 0x7fffffff)) 992 ui = phys(struct uba_device *, updinfo[unit]); 993 if (ui->ui_alive == 0) 994 return (ENXIO); 995 uba = phys(struct uba_hd *, ui->ui_hd)->uh_physuba; 996 ubainit(uba); 997 upaddr = (struct updevice *)ui->ui_physaddr; 998 DELAY(5000000); 999 num = maxfree; 1000 upaddr->upcs2 = unit; 1001 DELAY(100); 1002 upaddr->upcs1 = UP_DCLR|UP_GO; 1003 upaddr->upcs1 = UP_PRESET|UP_GO; 1004 upaddr->upof = UPOF_FMT22; 1005 retry = 0; 1006 do { 1007 DELAY(25); 1008 if (++retry > 527) 1009 break; 1010 } while ((upaddr->upds & UP_RDY) == 0); 1011 if ((upaddr->upds & UPDS_DREADY) != UPDS_DREADY) 1012 return (EFAULT); 1013 start = 0; 1014 st = &upst[ui->ui_type]; 1015 sizes = phys(struct size *, st->sizes); 1016 if (dumplo < 0) 1017 return (EINVAL); 1018 if (dumplo + num >= sizes[minor(dev)&07].nblocks) 1019 num = sizes[minor(dev)&07].nblocks - dumplo; 1020 while (num > 0) { 1021 register struct pte *io; 1022 register int i; 1023 int cn, sn, tn; 1024 daddr_t bn; 1025 1026 blk = num > DBSIZE ? DBSIZE : num; 1027 io = uba->uba_map; 1028 for (i = 0; i < blk; i++) 1029 *(int *)io++ = (btop(start)+i) | (1<<21) | UBAMR_MRV; 1030 *(int *)io = 0; 1031 bn = dumplo + btop(start); 1032 cn = bn/st->nspc + sizes[minor(dev)&07].cyloff; 1033 sn = bn%st->nspc; 1034 tn = sn/st->nsect; 1035 sn = sn%st->nsect; 1036 upaddr->updc = cn; 1037 rp = (short *) &upaddr->upda; 1038 *rp = (tn << 8) + sn; 1039 *--rp = 0; 1040 *--rp = -blk*NBPG / sizeof (short); 1041 *--rp = UP_GO|UP_WCOM; 1042 retry = 0; 1043 do { 1044 DELAY(25); 1045 if (++retry > 527) 1046 break; 1047 } while ((upaddr->upcs1 & UP_RDY) == 0); 1048 if ((upaddr->upds & UPDS_DREADY) != UPDS_DREADY) { 1049 printf("up%d: not ready", unit); 1050 if ((upaddr->upds & UPDS_DREADY) != UPDS_DREADY) { 1051 printf("\n"); 1052 return (EIO); 1053 } 1054 printf(" (flakey)\n"); 1055 } 1056 if (upaddr->upds&UPDS_ERR) 1057 return (EIO); 1058 start += blk*NBPG; 1059 num -= blk; 1060 } 1061 return (0); 1062 } 1063 1064 upsize(dev) 1065 dev_t dev; 1066 { 1067 int unit = upunit(dev); 1068 struct uba_device *ui; 1069 struct upst *st; 1070 1071 if (unit >= NUP || (ui = updinfo[unit]) == 0 || ui->ui_alive == 0) 1072 return (-1); 1073 st = &upst[ui->ui_type]; 1074 return (st->sizes[minor(dev) & 07].nblocks); 1075 } 1076 #endif 1077