1 /* ut.c 4.6 81/11/11 */ 2 3 #include "ut.h" 4 #if NUT > 0 5 /* 6 * System Industries Model 9700 Tape Drive 7 * emulates a TU45 on the UNIBUS 8 * 9 * TODO: 10 * check out attention processing 11 * try reset code and dump code 12 */ 13 #include "../h/param.h" 14 #include "../h/systm.h" 15 #include "../h/buf.h" 16 #include "../h/conf.h" 17 #include "../h/dir.h" 18 #include "../h/file.h" 19 #include "../h/user.h" 20 #include "../h/map.h" 21 #include "../h/pte.h" 22 #include "../h/ubareg.h" 23 #include "../h/ubavar.h" 24 #include "../h/mtio.h" 25 #include "../h/ioctl.h" 26 #include "../h/cmap.h" 27 #include "../h/cpu.h" 28 29 #include "../h/utreg.h" 30 31 struct buf rutbuf[NUT]; /* bufs for raw i/o */ 32 struct buf cutbuf[NUT]; /* bufs for control operations */ 33 struct buf tjutab[NTJ]; /* bufs for slave queue headers */ 34 35 struct uba_ctlr *utminfo[NUT]; 36 struct uba_device *tjdinfo[NTJ]; 37 int utprobe(), utslave(), utattach(), utdgo(), utintr(), uttimer(); 38 u_short utstd[] = { 0772440, 0 }; 39 struct uba_driver utdriver = 40 { utprobe, utslave, utattach, utdgo, utstd, "tj", tjdinfo, "ut", utminfo, 0 }; 41 42 /* bits in minor device */ 43 #define TJUNIT(dev) (minor(dev)&03) 44 #define T_NOREWIND 04 45 #define T_1600BPI 010 46 #define T_6250BPI 020 47 short utdens[] = { UT_NRZI, UT_PE, UT_GCR, UT_NRZI }; 48 49 /* slave to controller mapping table */ 50 short tjtout[NTJ]; 51 #define UTUNIT(dev) (tjtout[TJUNIT(dev)]) 52 53 #define INF (daddr_t)1000000L /* a block number that wont exist */ 54 55 struct tj_softc { 56 char sc_openf; /* exclusive open */ 57 char sc_lastiow; /* last I/O operation was a write */ 58 daddr_t sc_blkno; /* next block to transfer */ 59 daddr_t sc_nxrec; /* next record on tape */ 60 u_short sc_erreg; /* image of uter */ 61 u_short sc_dsreg; /* image of utds */ 62 u_short sc_resid; /* residual from transfer */ 63 u_short sc_dens; /* sticky selected density */ 64 daddr_t sc_timo; /* time until timeout expires */ 65 short sc_tact; /* timeout is active flag */ 66 } tj_softc[NTJ]; 67 68 /* 69 * Internal per/slave states found in sc_state 70 */ 71 #define SSEEK 1 /* seeking */ 72 #define SIO 2 /* doing sequential I/O */ 73 #define SCOM 3 /* sending a control command */ 74 #define SREW 4 /* doing a rewind op */ 75 #define SERASE 5 /* erase inter-record gap */ 76 #define SERASED 6 /* erased inter-record gap */ 77 78 utprobe(reg) 79 caddr_t reg; 80 { 81 register int br, cvec; 82 #ifdef lint 83 br=0; cvec=br; br=cvec; 84 #endif 85 /* 86 * It appears the controller won't interrupt unless the 87 * slave is off-line...this is as bad as the TS-11. 88 */ 89 #ifdef notdef 90 ((struct utdevice *) reg)->utcs1 = UT_IE|UT_NOP|UT_GO; 91 DELAY(10000); 92 ((struct utdevice *) reg)->utcs1 = UT_CLEAR|UT_GO; 93 #else 94 br = 0x15; 95 cvec = 0164; 96 return(1); 97 #endif 98 } 99 100 /*ARGSUSED*/ 101 utslave(ui, reg) 102 struct uba_device *ui; 103 caddr_t reg; 104 { 105 /* 106 * A real TU45 would support the slave present bit 107 * int the drive type register, but this thing doesn't, 108 * so there's no way to determine if a slave is present or not. 109 */ 110 return(1); 111 } 112 113 utattach(ui) 114 struct uba_device *ui; 115 { 116 tjtout[ui->ui_unit] = ui->ui_mi->um_ctlr; 117 } 118 119 /* 120 * Open the device with exclusive access. 121 */ 122 utopen(dev, flag) 123 dev_t dev; 124 int flag; 125 { 126 register int tjunit = TJUNIT(dev); 127 register struct uba_device *ui; 128 register struct tj_softc *sc; 129 int olddens, dens; 130 131 if (tjunit >= NTJ || (sc = &tj_softc[tjunit])->sc_openf || 132 (ui = tjdinfo[tjunit]) == 0 || ui->ui_alive == 0) { 133 u.u_error = ENXIO; 134 return; 135 } 136 olddens = sc->sc_dens; 137 dens = sc->sc_dens = utdens[(minor(dev)&(T_1600BPI|T_6250BPI))>>3]| 138 PDP11FMT|(ui->ui_slave&07); 139 get: 140 utcommand(dev, UT_SENSE, 1); 141 if (sc->sc_dsreg&UTDS_PIP) { 142 sleep((caddr_t) &lbolt, PZERO+1); 143 goto get; 144 } 145 sc->sc_dens = olddens; 146 if ((sc->sc_dsreg&UTDS_MOL) == 0) { 147 uprintf("tj%d: not online\n", tjunit); 148 u.u_error = EIO; 149 return; 150 } 151 if ((flag&FWRITE) && (sc->sc_dsreg&UTDS_WRL)) { 152 uprintf("tj%d: no write ring\n", tjunit); 153 u.u_error = EIO; 154 return; 155 } 156 if ((sc->sc_dsreg&UTDS_BOT) == 0 && (flag&FWRITE) && 157 dens != sc->sc_dens) { 158 uprintf("tj%d: can't change density in mid-tape\n", tjunit); 159 u.u_error = EIO; 160 return; 161 } 162 sc->sc_openf = 1; 163 sc->sc_blkno = (daddr_t)0; 164 sc->sc_nxrec = INF; 165 sc->sc_lastiow = 0; 166 sc->sc_dens = dens; 167 /* 168 * For 6250 bpi take exclusive use of the UNIBUS. 169 */ 170 ui->ui_driver->ud_xclu = (dens&(T_1600BPI|T_6250BPI)) == T_6250BPI; 171 (void) spl6(); 172 if (sc->sc_tact == 0) { 173 sc->sc_timo = INF; 174 sc->sc_tact = 1; 175 timeout(uttimer, (caddr_t)dev, 5*hz); 176 } 177 (void) spl0(); 178 } 179 180 utclose(dev, flag) 181 register dev_t dev; 182 register flag; 183 { 184 register struct tj_softc *sc = &tj_softc[TJUNIT(dev)]; 185 186 if (flag == FWRITE || ((flag&FWRITE) && sc->sc_lastiow)) { 187 utcommand(dev, UT_WEOF, 1); 188 utcommand(dev, UT_WEOF, 1); 189 utcommand(dev, UT_SREV, 1); 190 } 191 if ((minor(dev)&T_NOREWIND) == 0) 192 utcommand(dev, UT_REW, 0); 193 sc->sc_openf = 0; 194 } 195 196 utcommand(dev, com, count) 197 dev_t dev; 198 int com, count; 199 { 200 register struct buf *bp; 201 202 bp = &cutbuf[UTUNIT(dev)]; 203 (void) spl5(); 204 while (bp->b_flags&B_BUSY) { 205 if(bp->b_repcnt == 0 && (bp->b_flags&B_DONE)) 206 break; 207 bp->b_flags |= B_WANTED; 208 sleep((caddr_t)bp, PRIBIO); 209 } 210 bp->b_flags = B_BUSY|B_READ; 211 (void) spl0(); 212 bp->b_dev = dev; 213 bp->b_command = com; 214 bp->b_repcnt = count; 215 bp->b_blkno = 0; 216 utstrategy(bp); 217 if (count == 0) 218 return; 219 iowait(bp); 220 if (bp->b_flags&B_WANTED) 221 wakeup((caddr_t)bp); 222 bp->b_flags &= B_ERROR; 223 } 224 225 /* 226 * Queue a tape operation. 227 */ 228 utstrategy(bp) 229 register struct buf *bp; 230 { 231 int tjunit = TJUNIT(bp->b_dev); 232 register struct uba_ctlr *um; 233 register struct buf *dp; 234 235 /* 236 * Put transfer at end of unit queue 237 */ 238 dp = &tjutab[tjunit]; 239 bp->av_forw = NULL; 240 (void) spl5(); 241 if (dp->b_actf == NULL) { 242 dp->b_actf = bp; 243 /* 244 * Transport not active, so... 245 * put at end of controller queue 246 */ 247 dp->b_forw = NULL; 248 um = tjdinfo[tjunit]->ui_mi; 249 if (um->um_tab.b_actf == NULL) 250 um->um_tab.b_actf = dp; 251 else 252 um->um_tab.b_actl->b_forw = dp; 253 um->um_tab.b_actl = dp; 254 } else 255 dp->b_actl->av_forw = bp; 256 dp->b_actl = bp; 257 /* 258 * If the controller is not busy, set it going. 259 */ 260 if (um->um_tab.b_state == 0) 261 utstart(um); 262 (void) spl0(); 263 } 264 265 utstart(um) 266 register struct uba_ctlr *um; 267 { 268 register struct utdevice *addr; 269 register struct buf *bp, *dp; 270 register struct tj_softc *sc; 271 struct uba_device *ui; 272 int tjunit; 273 daddr_t blkno; 274 275 loop: 276 /* 277 * Scan controller queue looking for units with 278 * transaction queues to dispatch 279 */ 280 if ((dp = um->um_tab.b_actf) == NULL) 281 return; 282 if ((bp = dp->b_actf) == NULL) { 283 um->um_tab.b_actf = dp->b_forw; 284 goto loop; 285 } 286 addr = (struct utdevice *)um->um_addr; 287 tjunit = TJUNIT(bp->b_dev); 288 ui = tjdinfo[tjunit]; 289 sc = &tj_softc[tjunit]; 290 /* note slave select, density, and format were merged on open */ 291 addr->uttc = sc->sc_dens; 292 sc->sc_dsreg = addr->utds; 293 sc->sc_erreg = addr->uter; 294 /* watch this, sports fans */ 295 sc->sc_resid = bp->b_flags&B_READ ? 296 bp->b_bcount - ((-addr->utfc)&0xffff) : -addr->utwc<<1; 297 /* 298 * Default is that last command was NOT a write command; 299 * if we do a write command we will notice this in utintr(). 300 */ 301 sc->sc_lastiow = 0; 302 if (sc->sc_openf < 0 || (addr->utds&UTDS_MOL) == 0) { 303 /* 304 * Have had a hard error on a non-raw tape 305 * or the tape unit is now unavailable 306 * (e.g. taken off line). 307 */ 308 bp->b_flags |= B_ERROR; 309 goto next; 310 } 311 if (bp == &cutbuf[UTUNIT(bp->b_dev)]) { 312 /* 313 * Execute a control operation with the specified 314 * count. 315 */ 316 if (bp->b_command == UT_SENSE) 317 goto next; 318 /* 319 * Set next state; handle timeouts 320 */ 321 if (bp->b_command == UT_REW) { 322 um->um_tab.b_state = SREW; 323 sc->sc_timo = 5*60; 324 } else { 325 um->um_tab.b_state = SCOM; 326 sc->sc_timo = imin(imax(10*(int)-bp->b_repcnt,60),5*60); 327 } 328 /* NOTE: this depends on the ut command values */ 329 if (bp->b_command >= UT_SFORW && bp->b_command <= UT_SREVF) 330 addr->utfc = -bp->b_repcnt; 331 goto dobpcmd; 332 } 333 /* 334 * The following checks boundary conditions for operations 335 * on non-raw tapes. On raw tapes the initialization of 336 * sc->sc_nxrec by utphys causes them to be skipped normally 337 * (except in the case of retries). 338 */ 339 if (dbtofsb(bp->b_blkno) > sc->sc_nxrec) { 340 /* can't read past end of file */ 341 bp->b_flags |= B_ERROR; 342 bp->b_error = ENXIO; 343 goto next; 344 } 345 if (dbtofsb(bp->b_blkno) == sc->sc_nxrec && (bp->b_flags&B_READ)) { 346 /* read at eof returns 0 count */ 347 bp->b_resid = bp->b_bcount; 348 clrbuf(bp); 349 goto next; 350 } 351 if ((bp->b_flags&B_READ) == 0) 352 sc->sc_nxrec = dbtofsb(bp->b_blkno)+1; 353 /* 354 * If the tape is correctly positioned, set up all the 355 * registers but the csr, and give control over to the 356 * UNIBUS adaptor routines, to wait for resources to 357 * start I/O. 358 */ 359 if ((blkno = sc->sc_blkno) == dbtofsb(bp->b_blkno)) { 360 addr->utwc = -(((bp->b_bcount)+1)>>1); 361 addr->utfc = -bp->b_bcount; 362 if ((bp->b_flags&B_READ) == 0) { 363 /* 364 * On write error retries erase the 365 * inter-record gap before rewriting. 366 */ 367 if (um->um_tab.b_errcnt) { 368 if (um->um_tab.b_state != SERASED) { 369 um->um_tab.b_state = SERASE; 370 sc->sc_timo = 60; 371 addr->utcs1 = UT_ERASE|UT_IE|UT_GO; 372 return; 373 } 374 } 375 um->um_cmd = UT_WCOM; 376 } else 377 um->um_cmd = UT_RCOM; 378 sc->sc_timo = 60; 379 um->um_tab.b_state = SIO; 380 (void) ubago(ui); 381 return; 382 } 383 /* 384 * Tape positioned incorrectly; seek forwards or 385 * backwards to the correct spot. This happens for 386 * raw tapes only on error retries. 387 */ 388 um->um_tab.b_state = SSEEK; 389 if (blkno < dbtofsb(bp->b_blkno)) { 390 addr->utfc = blkno - dbtofsb(bp->b_blkno); 391 bp->b_command = UT_SFORW; 392 } else { 393 addr->utfc = dbtofsb(bp->b_blkno) - blkno; 394 bp->b_command = UT_SREV; 395 } 396 sc->sc_timo = imin(imax(10 * -addr->utfc, 60), 5*60); 397 398 dobpcmd: 399 /* 400 * Perform the command setup in bp. 401 */ 402 addr->utcs1 = bp->b_command|UT_IE|UT_GO; 403 return; 404 next: 405 /* 406 * Advance to the next command in the slave queue, 407 * posting notice and releasing resources as needed. 408 */ 409 if (um->um_ubinfo) 410 ubadone(um); 411 um->um_tab.b_errcnt = 0; 412 dp->b_actf = bp->av_forw; 413 iodone(bp); 414 goto loop; 415 } 416 417 /* 418 * Start operation on controller -- 419 * UNIBUS resources have been allocated. 420 */ 421 utdgo(um) 422 register struct uba_ctlr *um; 423 { 424 register struct utdevice *addr = (struct utdevice *)um->um_addr; 425 426 addr->utba = (u_short) um->um_ubinfo; 427 addr->utcs1 = um->um_cmd|((um->um_ubinfo>>8)&0x30)|UT_IE|UT_GO; 428 } 429 430 /* 431 * Ut interrupt handler 432 */ 433 /*ARGSUSED*/ 434 utintr(ut11) 435 int ut11; 436 { 437 struct buf *dp; 438 register struct buf *bp; 439 register struct uba_ctlr *um = utminfo[ut11]; 440 register struct utdevice *addr; 441 register struct tj_softc *sc; 442 u_short tjunit, cs2, cs1; 443 register state; 444 445 if ((dp = um->um_tab.b_actf) == NULL) 446 return; 447 bp = dp->b_actf; 448 tjunit = TJUNIT(bp->b_dev); 449 addr = (struct utdevice *)tjdinfo[tjunit]->ui_addr; 450 sc = &tj_softc[tjunit]; 451 /* 452 * Record status... 453 */ 454 sc->sc_dsreg = addr->utds; 455 sc->sc_erreg = addr->uter; 456 sc->sc_resid = bp->b_flags&B_READ ? 457 bp->b_bcount - (-addr->utfc)&0xffff : -addr->utwc<<1; 458 if ((bp->b_flags&B_READ) == 0) 459 sc->sc_lastiow = 1; 460 state = um->um_tab.b_state; 461 um->um_tab.b_state = 0; 462 /* 463 * Check for errors... 464 */ 465 if ((addr->utds&UTDS_ERR) || (addr->utcs1&UT_TRE)) { 466 /* 467 * To clear the ERR bit, we must issue a drive clear 468 * command, and to clear the TRE bit we must set the 469 * controller clear bit. 470 */ 471 cs2 = addr->utcs2; 472 if ((cs1 = addr->utcs1)&UT_TRE) 473 addr->utcs2 |= UTCS2_CLR; 474 /* is this dangerous ?? */ 475 while ((addr->utcs1&UT_RDY) == 0) 476 ; 477 addr->utcs1 = UT_CLEAR|UT_GO; 478 /* 479 * If we hit a tape mark or EOT update our position. 480 */ 481 if (sc->sc_dsreg&(UTDS_TM|UTDS_EOT)) { 482 /* 483 * Set blkno and nxrec 484 */ 485 if (bp == &cutbuf[UTUNIT(bp->b_dev)]) { 486 if (sc->sc_blkno > dbtofsb(bp->b_blkno)) { 487 sc->sc_nxrec = 488 dbtofsb(bp->b_blkno) - addr->utfc; 489 sc->sc_blkno = sc->sc_nxrec; 490 } else { 491 sc->sc_blkno = 492 dbtofsb(bp->b_blkno) + addr->utfc; 493 sc->sc_nxrec = sc->sc_blkno-1; 494 } 495 } else 496 sc->sc_nxrec = dbtofsb(bp->b_blkno); 497 state = SCOM; /* force completion */ 498 /* 499 * Stuff so we can unstuff later 500 * to get the residual. 501 */ 502 addr->utwc = (-bp->b_bcount)>>1; 503 addr->utfc = -bp->b_bcount; 504 if (sc->sc_dsreg&UTDS_EOT) 505 goto harderror; 506 goto opdone; 507 } 508 /* 509 * If we were reading from a raw tape and the only error 510 * was that the record was too long, then we don't consider 511 * this an error. 512 */ 513 if (bp == &rutbuf[UTUNIT(bp->b_dev)] && (bp->b_flags&B_READ) && 514 (sc->sc_erreg&UTER_FCE)) 515 goto ignoreerr; 516 /* 517 * Fix up errors which occur due to backspacing "over" the 518 * front of the tape. 519 */ 520 if ((sc->sc_dsreg&UTDS_BOT) && 521 (bp->b_command == UT_SREV || bp->b_command == UT_SREV) && 522 ((sc->sc_erreg &= ~(UTER_NEF|UTER_FCE)) == 0)) 523 goto opdone; 524 /* 525 * Retry soft errors up to 8 times 526 */ 527 if ((sc->sc_erreg&UTER_HARD) == 0 && state == SIO) { 528 if (++um->um_tab.b_errcnt < 7) { 529 sc->sc_blkno++; 530 ubadone(um); 531 goto opcont; 532 } 533 } else 534 harderror: 535 /* 536 * Hard or non-I/O errors on non-raw tape 537 * cause it to close; also, reading off the 538 * end of the tape. 539 */ 540 if (sc->sc_openf > 0 && 541 bp != &rutbuf[UTUNIT(bp->b_dev)] || 542 sc->sc_dsreg&UTDS_EOT) 543 sc->sc_openf = -1; 544 /* 545 * Couldn't recover error. 546 */ 547 printf("ut%d: hard error bn%d cs1=%b er=%b cs2=%b ds=%b\n", 548 tjunit, bp->b_blkno, cs1, UT_BITS, sc->sc_erreg, 549 UTER_BITS, cs2, UTCS2_BITS, sc->sc_dsreg, UTDS_BITS); 550 bp->b_flags |= B_ERROR; 551 goto opdone; 552 } 553 ignoreerr: 554 /* 555 * Advance tape control FSM. 556 */ 557 switch (state) { 558 559 case SIO: /* read/write increments tape block # */ 560 sc->sc_blkno++; 561 break; 562 563 case SCOM: /* forw/rev space updates current position */ 564 if (bp == &cutbuf[UTUNIT(bp->b_dev)]) 565 switch (bp->b_command) { 566 567 case UT_SFORW: 568 sc->sc_blkno -= bp->b_repcnt; 569 break; 570 571 case UT_SREV: 572 sc->sc_blkno += bp->b_repcnt; 573 break; 574 } 575 break; 576 577 case SSEEK: 578 sc->sc_blkno = dbtofsb(bp->b_blkno); 579 goto opcont; 580 581 case SERASE: 582 /* 583 * Completed erase of the inter-record gap due to a 584 * write error; now retry the write operation. 585 */ 586 um->um_tab.b_state = SERASED; 587 goto opcont; 588 589 case SREW: /* clear attention bit */ 590 addr->utcs1 = UT_CLEAR|UT_GO; 591 break; 592 593 default: 594 printf("bad state %d\n", state); 595 panic("utintr"); 596 } 597 598 opdone: 599 /* 600 * Reset error count and remove 601 * from device queue 602 */ 603 um->um_tab.b_errcnt = 0; 604 dp->b_actf = bp->av_forw; 605 bp->b_resid = bp->b_command&B_READ ? 606 bp->b_bcount - ((-addr->utfc)&0xffff) : -addr->utwc<<1; 607 ubadone(um); 608 iodone(bp); 609 /* 610 * Circulate slave to end of controller queue 611 * to give other slaves a chance 612 */ 613 um->um_tab.b_actf = dp->b_forw; 614 if (dp->b_actf) { 615 dp->b_forw = NULL; 616 if (um->um_tab.b_actf == NULL) 617 um->um_tab.b_actf = dp; 618 else 619 um->um_tab.b_actl->b_forw = dp; 620 um->um_tab.b_actl = dp; 621 } 622 if (um->um_tab.b_actf == 0) 623 return; 624 opcont: 625 utstart(um); 626 } 627 628 /* 629 * Watchdog timer routine. 630 */ 631 uttimer(dev) 632 int dev; 633 { 634 register struct tj_softc *sc = &tj_softc[TJUNIT(dev)]; 635 register short x; 636 637 if (sc->sc_timo != INF && (sc->sc_timo -= 5) < 0) { 638 printf("tj%d: lost interrupt\n", TJUNIT(dev)); 639 sc->sc_timo = INF; 640 x = spl5(); 641 utintr(UTUNIT(dev)); 642 (void) splx(x); 643 } 644 timeout(uttimer, (caddr_t)dev, 5*hz); 645 } 646 647 /* 648 * Raw interface for a read 649 */ 650 utread(dev) 651 dev_t dev; 652 { 653 utphys(dev); 654 if (u.u_error) 655 return; 656 physio(utstrategy, &rutbuf[UTUNIT(dev)], dev, B_READ, minphys); 657 } 658 659 /* 660 * Raw interface for a write 661 */ 662 utwrite(dev) 663 { 664 utphys(dev); 665 if (u.u_error) 666 return; 667 physio(utstrategy, &rutbuf[UTUNIT(dev)], dev, B_WRITE, minphys); 668 } 669 670 /* 671 * Check for valid device number dev and update our notion 672 * of where we are on the tape 673 */ 674 utphys(dev) 675 dev_t dev; 676 { 677 register int tjunit = TJUNIT(dev); 678 register struct tj_softc *sc; 679 register struct uba_device *ui; 680 681 if (tjunit >= NTJ || (ui=tjdinfo[tjunit]) == 0 || ui->ui_alive == 0) { 682 u.u_error = ENXIO; 683 return; 684 } 685 sc = &tj_softc[tjunit]; 686 sc->sc_blkno = dbtofsb(u.u_offset>>9); 687 sc->sc_nxrec = sc->sc_blkno+1; 688 } 689 690 /*ARGSUSED*/ 691 utioctl(dev, cmd, addr, flag) 692 dev_t dev; 693 caddr_t addr; 694 { 695 register struct tj_softc *sc = &tj_softc[TJUNIT(dev)]; 696 register struct buf *bp = &cutbuf[UTUNIT(dev)]; 697 register callcount; 698 int fcount; 699 struct mtop mtop; 700 struct mtget mtget; 701 /* we depend of the values and order of the MT codes here */ 702 static utops[] = 703 {UT_WEOF,UT_SFORWF,UT_SREVF,UT_SFORW,UT_SREV,UT_REW,UT_REWOFFL,UT_SENSE}; 704 705 switch (cmd) { 706 707 case MTIOCTOP: 708 if (copyin((caddr_t)addr, (caddr_t)&mtop, sizeof(mtop))) { 709 u.u_error = EFAULT; 710 return; 711 } 712 switch(mtop.mt_op) { 713 714 case MTWEOF: 715 callcount = mtop.mt_count; 716 fcount = 1; 717 break; 718 719 case MTFSF: case MTBSF: 720 case MTFSR: case MTBSR: 721 callcount = 1; 722 fcount = mtop.mt_count; 723 break; 724 725 case MTREW: case MTOFFL: case MTNOP: 726 callcount = 1; 727 fcount = 1; 728 break; 729 730 default: 731 u.u_error = ENXIO; 732 return; 733 } 734 if (callcount <= 0 || fcount <= 0) { 735 u.u_error = ENXIO; 736 return; 737 } 738 while (--callcount >= 0) { 739 utcommand(dev, utops[mtop.mt_op], fcount); 740 /* note this depends on the mtop values */ 741 if ((mtop.mt_op >= MTFSF || mtop.mt_op <= MTBSR) && 742 bp->b_resid) { 743 u.u_error = EIO; 744 break; 745 } 746 if ((bp->b_flags&B_ERROR) || (sc->sc_dsreg&UTDS_BOT)) 747 break; 748 } 749 geterror(bp); 750 return; 751 752 case MTIOCGET: 753 mtget.mt_dsreg = sc->sc_dsreg; 754 mtget.mt_erreg = sc->sc_erreg; 755 mtget.mt_resid = sc->sc_resid; 756 mtget.mt_type = MT_ISUT; 757 if (copyout((caddr_t)&mtget, addr, sizeof(mtget))) 758 u.u_error = EFAULT; 759 return; 760 761 default: 762 u.u_error = ENXIO; 763 } 764 } 765 766 utreset(uban) 767 int uban; 768 { 769 register struct uba_ctlr *um; 770 register ut11, tjunit; 771 register struct uba_device *ui; 772 register struct buf *dp; 773 774 for (ut11 = 0; ut11 < NUT; ut11++) { 775 if ((um = utminfo[ut11]) == 0 || um->um_alive == 0 || 776 um->um_ubanum != uban) 777 continue; 778 printf(" ut%d", ut11); 779 um->um_tab.b_state = 0; 780 um->um_tab.b_actf = um->um_tab.b_actl = 0; 781 if (um->um_ubinfo) { 782 printf("<%d>", (um->um_ubinfo>>28)&0xf); 783 ubadone(um); 784 } 785 ((struct utdevice *)(um->um_addr))->utcs1 = UT_CLEAR|UT_GO; 786 ((struct utdevice *)(um->um_addr))->utcs2 |= UTCS2_CLR; 787 for (tjunit = 0; tjunit < NTJ; tjunit++) { 788 if ((ui = tjdinfo[tjunit]) == 0 || ui->ui_mi != um || 789 ui->ui_alive == 0) 790 continue; 791 dp = &tjutab[tjunit]; 792 dp->b_state = 0; 793 dp->b_forw = 0; 794 if (um->um_tab.b_actf == NULL) 795 um->um_tab.b_actf = dp; 796 else 797 um->um_tab.b_actl->b_forw = dp; 798 um->um_tab.b_actl = dp; 799 if (tj_softc[tjunit].sc_openf > 0) 800 tj_softc[tjunit].sc_openf = -1; 801 } 802 utstart(um); 803 } 804 } 805 806 /* 807 * Do a stand-alone core dump to tape -- 808 * from here down, routines are used only in dump context 809 */ 810 #define DBSIZE 20 811 812 utdump() 813 { 814 register struct uba_device *ui; 815 register struct uba_regs *up; 816 register struct utdevice *addr; 817 int blk, num = maxfree; 818 int start = 0; 819 820 #define phys(a,b) ((b)((int)(a)&0x7fffffff)) 821 if (tjdinfo[0] == 0) 822 return (ENXIO); 823 ui = phys(tjdinfo[0], struct uba_device *); 824 up = phys(ui->ui_hd, struct uba_hd *)->uh_physuba; 825 ubainit(); 826 DELAY(1000000); 827 utwait(addr); 828 addr = (struct utdevice *)ui->ui_physaddr; 829 /* 830 * Be sure to set the appropriate density here. We use 831 * 6250, but maybe it should be done at 1600 to insure the 832 * tape can be read by most any other tape drive available. 833 */ 834 addr->uttc = UT_GCR|PDP11FMT; /* implicit slave 0 or-ed in */ 835 addr->utcs1 = UT_CLEAR|UT_GO; 836 while (num > 0) { 837 blk = num > DBSIZE ? DBSIZE : num; 838 utdwrite(start, blk, addr, up); 839 if ((addr->utds&UTDS_ERR) || (addr->utcs1&UT_TRE)) 840 return(EIO); 841 start += blk; 842 num -= blk; 843 } 844 uteof(addr); 845 uteof(addr); 846 utwait(addr); 847 if ((addr->utds&UTDS_ERR) || (addr->utcs1&UT_TRE)) 848 return(EIO); 849 addr->utcs1 = UT_REW|UT_GO; 850 return (0); 851 } 852 853 utdwrite(dbuf, num, addr, up) 854 register dbuf, num; 855 register struct utdevice *addr; 856 struct uba_regs *up; 857 { 858 register struct pte *io; 859 register int npf; 860 861 utwait(addr); 862 io = up->uba_map; 863 npf = num + 1; 864 while (--npf != 0) 865 *(int *)io++ = (dbuf++ | (1<<UBAMR_DPSHIFT) | UBAMR_MRV); 866 *(int *)io = 0; 867 addr->utwc = -((num*NBPG)>>1); 868 addr->utfc = -(num*NBPG); 869 addr->utba = 0; 870 addr->utcs1 = UT_WCOM|UT_GO; 871 } 872 873 utwait(addr) 874 struct utdevice *addr; 875 { 876 register s; 877 878 do 879 s = addr->utds; 880 while ((s&UTDS_DRY) == 0); 881 } 882 883 uteof(addr) 884 struct utdevice *addr; 885 { 886 887 utwait(addr); 888 addr->utcs1 = UT_WEOF|UT_GO; 889 } 890 #endif 891