1 /* ut.c 4.12 82/05/27 */ 2 3 #include "tj.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 /*ARGSUSED*/ 79 utprobe(reg) 80 caddr_t reg; 81 { 82 register int br, cvec; 83 #ifdef lint 84 br=0; cvec=br; br=cvec; 85 utintr(0); 86 #endif 87 /* 88 * The SI documentation says you must set the RDY bit 89 * (even though it's read-only) to force an interrupt. 90 */ 91 ((struct utdevice *) reg)->utcs1 = UT_IE|UT_NOP|UT_RDY; 92 DELAY(10000); 93 } 94 95 /*ARGSUSED*/ 96 utslave(ui, reg) 97 struct uba_device *ui; 98 caddr_t reg; 99 { 100 /* 101 * A real TU45 would support the slave present bit 102 * int the drive type register, but this thing doesn't, 103 * so there's no way to determine if a slave is present or not. 104 */ 105 return(1); 106 } 107 108 utattach(ui) 109 struct uba_device *ui; 110 { 111 tjtout[ui->ui_unit] = ui->ui_mi->um_ctlr; 112 } 113 114 /* 115 * Open the device with exclusive access. 116 */ 117 utopen(dev, flag) 118 dev_t dev; 119 int flag; 120 { 121 register int tjunit = TJUNIT(dev); 122 register struct uba_device *ui; 123 register struct tj_softc *sc; 124 int olddens, dens; 125 register int s; 126 127 if (tjunit >= NTJ || (sc = &tj_softc[tjunit])->sc_openf || 128 (ui = tjdinfo[tjunit]) == 0 || ui->ui_alive == 0) { 129 u.u_error = ENXIO; 130 return; 131 } 132 olddens = sc->sc_dens; 133 dens = sc->sc_dens = utdens[(minor(dev)&(T_1600BPI|T_6250BPI))>>3]| 134 PDP11FMT|(ui->ui_slave&07); 135 get: 136 utcommand(dev, UT_SENSE, 1); 137 if (sc->sc_dsreg&UTDS_PIP) { 138 sleep((caddr_t) &lbolt, PZERO+1); 139 goto get; 140 } 141 sc->sc_dens = olddens; 142 if ((sc->sc_dsreg&UTDS_MOL) == 0) { 143 uprintf("tj%d: not online\n", tjunit); 144 u.u_error = EIO; 145 return; 146 } 147 if ((flag&FWRITE) && (sc->sc_dsreg&UTDS_WRL)) { 148 uprintf("tj%d: no write ring\n", tjunit); 149 u.u_error = EIO; 150 return; 151 } 152 if ((sc->sc_dsreg&UTDS_BOT) == 0 && (flag&FWRITE) && 153 dens != sc->sc_dens) { 154 uprintf("tj%d: can't change density in mid-tape\n", tjunit); 155 u.u_error = EIO; 156 return; 157 } 158 sc->sc_openf = 1; 159 sc->sc_blkno = (daddr_t)0; 160 sc->sc_nxrec = INF; 161 sc->sc_lastiow = 0; 162 sc->sc_dens = dens; 163 /* 164 * For 6250 bpi take exclusive use of the UNIBUS. 165 */ 166 ui->ui_driver->ud_xclu = (dens&(T_1600BPI|T_6250BPI)) == T_6250BPI; 167 s = spl6(); 168 if (sc->sc_tact == 0) { 169 sc->sc_timo = INF; 170 sc->sc_tact = 1; 171 timeout(uttimer, (caddr_t)dev, 5*hz); 172 } 173 splx(s); 174 } 175 176 utclose(dev, flag) 177 register dev_t dev; 178 register flag; 179 { 180 register struct tj_softc *sc = &tj_softc[TJUNIT(dev)]; 181 182 if (flag == FWRITE || ((flag&FWRITE) && sc->sc_lastiow)) { 183 utcommand(dev, UT_WEOF, 1); 184 utcommand(dev, UT_WEOF, 1); 185 utcommand(dev, UT_SREV, 1); 186 } 187 if ((minor(dev)&T_NOREWIND) == 0) 188 utcommand(dev, UT_REW, 0); 189 sc->sc_openf = 0; 190 } 191 192 utcommand(dev, com, count) 193 dev_t dev; 194 int com, count; 195 { 196 register struct buf *bp; 197 register int s; 198 199 bp = &cutbuf[UTUNIT(dev)]; 200 s = spl5(); 201 while (bp->b_flags&B_BUSY) { 202 if(bp->b_repcnt == 0 && (bp->b_flags&B_DONE)) 203 break; 204 bp->b_flags |= B_WANTED; 205 sleep((caddr_t)bp, PRIBIO); 206 } 207 bp->b_flags = B_BUSY|B_READ; 208 splx(s); 209 bp->b_dev = dev; 210 bp->b_command = com; 211 bp->b_repcnt = count; 212 bp->b_blkno = 0; 213 utstrategy(bp); 214 if (count == 0) 215 return; 216 iowait(bp); 217 if (bp->b_flags&B_WANTED) 218 wakeup((caddr_t)bp); 219 bp->b_flags &= B_ERROR; 220 } 221 222 /* 223 * Queue a tape operation. 224 */ 225 utstrategy(bp) 226 register struct buf *bp; 227 { 228 int tjunit = TJUNIT(bp->b_dev); 229 register struct uba_ctlr *um; 230 register struct buf *dp; 231 232 /* 233 * Put transfer at end of unit queue 234 */ 235 dp = &tjutab[tjunit]; 236 bp->av_forw = NULL; 237 (void) spl5(); 238 if (dp->b_actf == NULL) { 239 dp->b_actf = bp; 240 /* 241 * Transport not active, so... 242 * put at end of controller queue 243 */ 244 dp->b_forw = NULL; 245 um = tjdinfo[tjunit]->ui_mi; 246 if (um->um_tab.b_actf == NULL) 247 um->um_tab.b_actf = dp; 248 else 249 um->um_tab.b_actl->b_forw = dp; 250 um->um_tab.b_actl = dp; 251 } else 252 dp->b_actl->av_forw = bp; 253 dp->b_actl = bp; 254 /* 255 * If the controller is not busy, set it going. 256 */ 257 if (um->um_tab.b_state == 0) 258 utstart(um); 259 (void) spl0(); 260 } 261 262 utstart(um) 263 register struct uba_ctlr *um; 264 { 265 register struct utdevice *addr; 266 register struct buf *bp, *dp; 267 register struct tj_softc *sc; 268 struct uba_device *ui; 269 int tjunit; 270 daddr_t blkno; 271 272 loop: 273 /* 274 * Scan controller queue looking for units with 275 * transaction queues to dispatch 276 */ 277 if ((dp = um->um_tab.b_actf) == NULL) 278 return; 279 if ((bp = dp->b_actf) == NULL) { 280 um->um_tab.b_actf = dp->b_forw; 281 goto loop; 282 } 283 addr = (struct utdevice *)um->um_addr; 284 tjunit = TJUNIT(bp->b_dev); 285 ui = tjdinfo[tjunit]; 286 sc = &tj_softc[tjunit]; 287 /* note slave select, density, and format were merged on open */ 288 addr->uttc = sc->sc_dens; 289 sc->sc_dsreg = addr->utds; 290 sc->sc_erreg = addr->uter; 291 /* watch this, sports fans */ 292 sc->sc_resid = bp->b_flags&B_READ ? 293 bp->b_bcount - ((-addr->utfc)&0xffff) : -addr->utwc<<1; 294 /* 295 * Default is that last command was NOT a write command; 296 * if we do a write command we will notice this in utintr(). 297 */ 298 sc->sc_lastiow = 0; 299 if (sc->sc_openf < 0 || (addr->utds&UTDS_MOL) == 0) { 300 /* 301 * Have had a hard error on a non-raw tape 302 * or the tape unit is now unavailable 303 * (e.g. taken off line). 304 */ 305 bp->b_flags |= B_ERROR; 306 goto next; 307 } 308 if (bp == &cutbuf[UTUNIT(bp->b_dev)]) { 309 /* 310 * Execute a control operation with the specified 311 * count. 312 */ 313 if (bp->b_command == UT_SENSE) 314 goto next; 315 /* 316 * Set next state; handle timeouts 317 */ 318 if (bp->b_command == UT_REW) { 319 um->um_tab.b_state = SREW; 320 sc->sc_timo = 5*60; 321 } else { 322 um->um_tab.b_state = SCOM; 323 sc->sc_timo = imin(imax(10*(int)-bp->b_repcnt,60),5*60); 324 } 325 /* NOTE: this depends on the ut command values */ 326 if (bp->b_command >= UT_SFORW && bp->b_command <= UT_SREVF) 327 addr->utfc = -bp->b_repcnt; 328 goto dobpcmd; 329 } 330 /* 331 * The following checks boundary conditions for operations 332 * on non-raw tapes. On raw tapes the initialization of 333 * sc->sc_nxrec by utphys causes them to be skipped normally 334 * (except in the case of retries). 335 */ 336 if (dbtofsb(bp->b_blkno) > sc->sc_nxrec) { 337 /* can't read past end of file */ 338 bp->b_flags |= B_ERROR; 339 bp->b_error = ENXIO; 340 goto next; 341 } 342 if (dbtofsb(bp->b_blkno) == sc->sc_nxrec && (bp->b_flags&B_READ)) { 343 /* read at eof returns 0 count */ 344 bp->b_resid = bp->b_bcount; 345 clrbuf(bp); 346 goto next; 347 } 348 if ((bp->b_flags&B_READ) == 0) 349 sc->sc_nxrec = dbtofsb(bp->b_blkno)+1; 350 /* 351 * If the tape is correctly positioned, set up all the 352 * registers but the csr, and give control over to the 353 * UNIBUS adaptor routines, to wait for resources to 354 * start I/O. 355 */ 356 if ((blkno = sc->sc_blkno) == dbtofsb(bp->b_blkno)) { 357 addr->utwc = -(((bp->b_bcount)+1)>>1); 358 addr->utfc = -bp->b_bcount; 359 if ((bp->b_flags&B_READ) == 0) { 360 /* 361 * On write error retries erase the 362 * inter-record gap before rewriting. 363 */ 364 if (um->um_tab.b_errcnt) { 365 if (um->um_tab.b_state != SERASED) { 366 um->um_tab.b_state = SERASE; 367 sc->sc_timo = 60; 368 addr->utcs1 = UT_ERASE|UT_IE|UT_GO; 369 return; 370 } 371 } 372 um->um_cmd = UT_WCOM; 373 } else 374 um->um_cmd = UT_RCOM; 375 sc->sc_timo = 60; 376 um->um_tab.b_state = SIO; 377 (void) ubago(ui); 378 return; 379 } 380 /* 381 * Tape positioned incorrectly; seek forwards or 382 * backwards to the correct spot. This happens for 383 * raw tapes only on error retries. 384 */ 385 um->um_tab.b_state = SSEEK; 386 if (blkno < dbtofsb(bp->b_blkno)) { 387 addr->utfc = blkno - dbtofsb(bp->b_blkno); 388 bp->b_command = UT_SFORW; 389 } else { 390 addr->utfc = dbtofsb(bp->b_blkno) - blkno; 391 bp->b_command = UT_SREV; 392 } 393 sc->sc_timo = imin(imax(10 * -addr->utfc, 60), 5*60); 394 395 dobpcmd: 396 /* 397 * Perform the command setup in bp. 398 */ 399 addr->utcs1 = bp->b_command|UT_IE|UT_GO; 400 return; 401 next: 402 /* 403 * Advance to the next command in the slave queue, 404 * posting notice and releasing resources as needed. 405 */ 406 if (um->um_ubinfo) 407 ubadone(um); 408 um->um_tab.b_errcnt = 0; 409 dp->b_actf = bp->av_forw; 410 iodone(bp); 411 goto loop; 412 } 413 414 /* 415 * Start operation on controller -- 416 * UNIBUS resources have been allocated. 417 */ 418 utdgo(um) 419 register struct uba_ctlr *um; 420 { 421 register struct utdevice *addr = (struct utdevice *)um->um_addr; 422 423 addr->utba = (u_short) um->um_ubinfo; 424 addr->utcs1 = um->um_cmd|((um->um_ubinfo>>8)&0x30)|UT_IE|UT_GO; 425 } 426 427 /* 428 * Ut interrupt handler 429 */ 430 /*ARGSUSED*/ 431 utintr(ut11) 432 int ut11; 433 { 434 struct buf *dp; 435 register struct buf *bp; 436 register struct uba_ctlr *um = utminfo[ut11]; 437 register struct utdevice *addr; 438 register struct tj_softc *sc; 439 u_short tjunit, cs2, cs1; 440 register state; 441 442 if ((dp = um->um_tab.b_actf) == NULL) 443 return; 444 bp = dp->b_actf; 445 tjunit = TJUNIT(bp->b_dev); 446 addr = (struct utdevice *)tjdinfo[tjunit]->ui_addr; 447 sc = &tj_softc[tjunit]; 448 /* 449 * Record status... 450 */ 451 sc->sc_timo = INF; 452 sc->sc_dsreg = addr->utds; 453 sc->sc_erreg = addr->uter; 454 sc->sc_resid = bp->b_flags&B_READ ? 455 bp->b_bcount - (-addr->utfc)&0xffff : -addr->utwc<<1; 456 if ((bp->b_flags&B_READ) == 0) 457 sc->sc_lastiow = 1; 458 state = um->um_tab.b_state; 459 um->um_tab.b_state = 0; 460 /* 461 * Check for errors... 462 */ 463 if ((addr->utds&UTDS_ERR) || (addr->utcs1&UT_TRE)) { 464 /* 465 * To clear the ERR bit, we must issue a drive clear 466 * command, and to clear the TRE bit we must set the 467 * controller clear bit. 468 */ 469 cs2 = addr->utcs2; 470 if ((cs1 = addr->utcs1)&UT_TRE) 471 addr->utcs2 |= UTCS2_CLR; 472 /* is this dangerous ?? */ 473 while ((addr->utcs1&UT_RDY) == 0) 474 ; 475 addr->utcs1 = UT_CLEAR|UT_GO; 476 /* 477 * If we hit a tape mark or EOT update our position. 478 */ 479 if (sc->sc_dsreg&(UTDS_TM|UTDS_EOT)) { 480 /* 481 * Set blkno and nxrec 482 */ 483 if (bp == &cutbuf[UTUNIT(bp->b_dev)]) { 484 if (sc->sc_blkno > dbtofsb(bp->b_blkno)) { 485 sc->sc_nxrec = 486 dbtofsb(bp->b_blkno) - addr->utfc; 487 sc->sc_blkno = sc->sc_nxrec; 488 } else { 489 sc->sc_blkno = 490 dbtofsb(bp->b_blkno) + addr->utfc; 491 sc->sc_nxrec = sc->sc_blkno-1; 492 } 493 } else 494 sc->sc_nxrec = dbtofsb(bp->b_blkno); 495 state = SCOM; /* force completion */ 496 /* 497 * Stuff so we can unstuff later 498 * to get the residual. 499 */ 500 addr->utwc = (-bp->b_bcount)>>1; 501 addr->utfc = -bp->b_bcount; 502 if (sc->sc_dsreg&UTDS_EOT) 503 goto harderror; 504 goto opdone; 505 } 506 /* 507 * If we were reading from a raw tape and the only error 508 * was that the record was too long, then we don't consider 509 * this an error. 510 */ 511 if (bp == &rutbuf[UTUNIT(bp->b_dev)] && (bp->b_flags&B_READ) && 512 (sc->sc_erreg&UTER_FCE)) 513 goto ignoreerr; 514 /* 515 * Fix up errors which occur due to backspacing "over" the 516 * front of the tape. 517 */ 518 if ((sc->sc_dsreg&UTDS_BOT) && 519 (bp->b_command == UT_SREV || bp->b_command == UT_SREV) && 520 ((sc->sc_erreg &= ~(UTER_NEF|UTER_FCE)) == 0)) 521 goto opdone; 522 /* 523 * Retry soft errors up to 8 times 524 */ 525 if ((sc->sc_erreg&UTER_HARD) == 0 && state == SIO) { 526 if (++um->um_tab.b_errcnt < 7) { 527 sc->sc_blkno++; 528 ubadone(um); 529 goto opcont; 530 } 531 } else 532 harderror: 533 /* 534 * Hard or non-I/O errors on non-raw tape 535 * cause it to close; also, reading off the 536 * end of the tape. 537 */ 538 if (sc->sc_openf > 0 && 539 bp != &rutbuf[UTUNIT(bp->b_dev)] || 540 sc->sc_dsreg&UTDS_EOT) 541 sc->sc_openf = -1; 542 /* 543 * Couldn't recover error. 544 */ 545 printf("ut%d: hard error bn%d cs1=%b er=%b cs2=%b ds=%b\n", 546 tjunit, bp->b_blkno, cs1, UT_BITS, sc->sc_erreg, 547 UTER_BITS, cs2, UTCS2_BITS, sc->sc_dsreg, UTDS_BITS); 548 bp->b_flags |= B_ERROR; 549 goto opdone; 550 } 551 ignoreerr: 552 /* 553 * Advance tape control FSM. 554 */ 555 switch (state) { 556 557 case SIO: /* read/write increments tape block # */ 558 sc->sc_blkno++; 559 break; 560 561 case SCOM: /* forw/rev space updates current position */ 562 if (bp == &cutbuf[UTUNIT(bp->b_dev)]) 563 switch (bp->b_command) { 564 565 case UT_SFORW: 566 sc->sc_blkno -= bp->b_repcnt; 567 break; 568 569 case UT_SREV: 570 sc->sc_blkno += bp->b_repcnt; 571 break; 572 } 573 break; 574 575 case SSEEK: 576 sc->sc_blkno = dbtofsb(bp->b_blkno); 577 goto opcont; 578 579 case SERASE: 580 /* 581 * Completed erase of the inter-record gap due to a 582 * write error; now retry the write operation. 583 */ 584 um->um_tab.b_state = SERASED; 585 goto opcont; 586 587 case SREW: /* clear attention bit */ 588 addr->utcs1 = UT_CLEAR|UT_GO; 589 break; 590 591 default: 592 printf("bad state %d\n", state); 593 panic("utintr"); 594 } 595 596 opdone: 597 /* 598 * Reset error count and remove 599 * from device queue 600 */ 601 um->um_tab.b_errcnt = 0; 602 dp->b_actf = bp->av_forw; 603 bp->b_resid = bp->b_command&B_READ ? 604 bp->b_bcount - ((-addr->utfc)&0xffff) : -addr->utwc<<1; 605 ubadone(um); 606 iodone(bp); 607 /* 608 * Circulate slave to end of controller queue 609 * to give other slaves a chance 610 */ 611 um->um_tab.b_actf = dp->b_forw; 612 if (dp->b_actf) { 613 dp->b_forw = NULL; 614 if (um->um_tab.b_actf == NULL) 615 um->um_tab.b_actf = dp; 616 else 617 um->um_tab.b_actl->b_forw = dp; 618 um->um_tab.b_actl = dp; 619 } 620 if (um->um_tab.b_actf == 0) 621 return; 622 opcont: 623 utstart(um); 624 } 625 626 /* 627 * Watchdog timer routine. 628 */ 629 uttimer(dev) 630 int dev; 631 { 632 register struct tj_softc *sc = &tj_softc[TJUNIT(dev)]; 633 register short x; 634 635 if (sc->sc_timo != INF && (sc->sc_timo -= 5) < 0) { 636 printf("tj%d: lost interrupt\n", TJUNIT(dev)); 637 sc->sc_timo = INF; 638 x = spl5(); 639 utintr(UTUNIT(dev)); 640 (void) splx(x); 641 } 642 timeout(uttimer, (caddr_t)dev, 5*hz); 643 } 644 645 /* 646 * Raw interface for a read 647 */ 648 utread(dev) 649 dev_t dev; 650 { 651 utphys(dev); 652 if (u.u_error) 653 return; 654 physio(utstrategy, &rutbuf[UTUNIT(dev)], dev, B_READ, minphys); 655 } 656 657 /* 658 * Raw interface for a write 659 */ 660 utwrite(dev) 661 { 662 utphys(dev); 663 if (u.u_error) 664 return; 665 physio(utstrategy, &rutbuf[UTUNIT(dev)], dev, B_WRITE, minphys); 666 } 667 668 /* 669 * Check for valid device number dev and update our notion 670 * of where we are on the tape 671 */ 672 utphys(dev) 673 dev_t dev; 674 { 675 register int tjunit = TJUNIT(dev); 676 register struct tj_softc *sc; 677 register struct uba_device *ui; 678 679 if (tjunit >= NTJ || (ui=tjdinfo[tjunit]) == 0 || ui->ui_alive == 0) { 680 u.u_error = ENXIO; 681 return; 682 } 683 sc = &tj_softc[tjunit]; 684 sc->sc_blkno = dbtofsb(u.u_offset>>9); 685 sc->sc_nxrec = sc->sc_blkno+1; 686 } 687 688 /*ARGSUSED*/ 689 utioctl(dev, cmd, addr, flag) 690 dev_t dev; 691 caddr_t addr; 692 { 693 register struct tj_softc *sc = &tj_softc[TJUNIT(dev)]; 694 register struct buf *bp = &cutbuf[UTUNIT(dev)]; 695 register callcount; 696 int fcount; 697 struct mtop mtop; 698 struct mtget mtget; 699 /* we depend of the values and order of the MT codes here */ 700 static utops[] = 701 {UT_WEOF,UT_SFORWF,UT_SREVF,UT_SFORW,UT_SREV,UT_REW,UT_REWOFFL,UT_SENSE}; 702 703 switch (cmd) { 704 705 case MTIOCTOP: 706 if (copyin((caddr_t)addr, (caddr_t)&mtop, sizeof(mtop))) { 707 u.u_error = EFAULT; 708 return; 709 } 710 switch(mtop.mt_op) { 711 712 case MTWEOF: 713 callcount = mtop.mt_count; 714 fcount = 1; 715 break; 716 717 case MTFSF: case MTBSF: 718 case MTFSR: case MTBSR: 719 callcount = 1; 720 fcount = mtop.mt_count; 721 break; 722 723 case MTREW: case MTOFFL: case MTNOP: 724 callcount = 1; 725 fcount = 1; 726 break; 727 728 default: 729 u.u_error = ENXIO; 730 return; 731 } 732 if (callcount <= 0 || fcount <= 0) { 733 u.u_error = ENXIO; 734 return; 735 } 736 while (--callcount >= 0) { 737 utcommand(dev, utops[mtop.mt_op], fcount); 738 /* note this depends on the mtop values */ 739 if ((mtop.mt_op >= MTFSF || mtop.mt_op <= MTBSR) && 740 bp->b_resid) { 741 u.u_error = EIO; 742 break; 743 } 744 if ((bp->b_flags&B_ERROR) || (sc->sc_dsreg&UTDS_BOT)) 745 break; 746 } 747 geterror(bp); 748 return; 749 750 case MTIOCGET: 751 mtget.mt_dsreg = sc->sc_dsreg; 752 mtget.mt_erreg = sc->sc_erreg; 753 mtget.mt_resid = sc->sc_resid; 754 mtget.mt_type = MT_ISUT; 755 if (copyout((caddr_t)&mtget, addr, sizeof(mtget))) 756 u.u_error = EFAULT; 757 return; 758 759 default: 760 u.u_error = ENXIO; 761 } 762 } 763 764 utreset(uban) 765 int uban; 766 { 767 register struct uba_ctlr *um; 768 register ut11, tjunit; 769 register struct uba_device *ui; 770 register struct buf *dp; 771 772 for (ut11 = 0; ut11 < NUT; ut11++) { 773 if ((um = utminfo[ut11]) == 0 || um->um_alive == 0 || 774 um->um_ubanum != uban) 775 continue; 776 printf(" ut%d", ut11); 777 um->um_tab.b_state = 0; 778 um->um_tab.b_actf = um->um_tab.b_actl = 0; 779 if (um->um_ubinfo) { 780 printf("<%d>", (um->um_ubinfo>>28)&0xf); 781 ubadone(um); 782 } 783 ((struct utdevice *)(um->um_addr))->utcs1 = UT_CLEAR|UT_GO; 784 ((struct utdevice *)(um->um_addr))->utcs2 |= UTCS2_CLR; 785 for (tjunit = 0; tjunit < NTJ; tjunit++) { 786 if ((ui = tjdinfo[tjunit]) == 0 || ui->ui_mi != um || 787 ui->ui_alive == 0) 788 continue; 789 dp = &tjutab[tjunit]; 790 dp->b_state = 0; 791 dp->b_forw = 0; 792 if (um->um_tab.b_actf == NULL) 793 um->um_tab.b_actf = dp; 794 else 795 um->um_tab.b_actl->b_forw = dp; 796 um->um_tab.b_actl = dp; 797 if (tj_softc[tjunit].sc_openf > 0) 798 tj_softc[tjunit].sc_openf = -1; 799 } 800 utstart(um); 801 } 802 } 803 804 /* 805 * Do a stand-alone core dump to tape -- 806 * from here down, routines are used only in dump context 807 */ 808 #define DBSIZE 20 809 810 utdump() 811 { 812 register struct uba_device *ui; 813 register struct uba_regs *up; 814 register struct utdevice *addr; 815 int blk, num = maxfree; 816 int start = 0; 817 818 #define phys(a,b) ((b)((int)(a)&0x7fffffff)) 819 if (tjdinfo[0] == 0) 820 return (ENXIO); 821 ui = phys(tjdinfo[0], struct uba_device *); 822 up = phys(ui->ui_hd, struct uba_hd *)->uh_physuba; 823 ubainit(up); 824 DELAY(1000000); 825 addr = (struct utdevice *)ui->ui_physaddr; 826 utwait(addr); 827 /* 828 * Be sure to set the appropriate density here. We use 829 * 6250, but maybe it should be done at 1600 to insure the 830 * tape can be read by most any other tape drive available. 831 */ 832 addr->uttc = UT_GCR|PDP11FMT; /* implicit slave 0 or-ed in */ 833 addr->utcs1 = UT_CLEAR|UT_GO; 834 while (num > 0) { 835 blk = num > DBSIZE ? DBSIZE : num; 836 utdwrite(start, blk, addr, up); 837 if ((addr->utds&UTDS_ERR) || (addr->utcs1&UT_TRE)) 838 return(EIO); 839 start += blk; 840 num -= blk; 841 } 842 uteof(addr); 843 uteof(addr); 844 utwait(addr); 845 if ((addr->utds&UTDS_ERR) || (addr->utcs1&UT_TRE)) 846 return(EIO); 847 addr->utcs1 = UT_REW|UT_GO; 848 return (0); 849 } 850 851 utdwrite(dbuf, num, addr, up) 852 register dbuf, num; 853 register struct utdevice *addr; 854 struct uba_regs *up; 855 { 856 register struct pte *io; 857 register int npf; 858 859 utwait(addr); 860 io = up->uba_map; 861 npf = num + 1; 862 while (--npf != 0) 863 *(int *)io++ = (dbuf++ | (1<<UBAMR_DPSHIFT) | UBAMR_MRV); 864 *(int *)io = 0; 865 addr->utwc = -((num*NBPG)>>1); 866 addr->utfc = -(num*NBPG); 867 addr->utba = 0; 868 addr->utcs1 = UT_WCOM|UT_GO; 869 } 870 871 utwait(addr) 872 struct utdevice *addr; 873 { 874 register s; 875 876 do 877 s = addr->utds; 878 while ((s&UTDS_DRY) == 0); 879 } 880 881 uteof(addr) 882 struct utdevice *addr; 883 { 884 885 utwait(addr); 886 addr->utcs1 = UT_WEOF|UT_GO; 887 } 888 #endif 889