1 /* 2 * Copyright (c) 1982 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 * @(#)tm.c 6.7 (Berkeley) 09/20/85 7 */ 8 9 #include "te.h" 10 #include "ts.h" 11 #if NTE > 0 12 /* 13 * TM11/TE10 tape driver 14 * 15 * TODO: 16 * test driver with more than one slave 17 * test driver with more than one controller 18 * test reset code 19 * what happens if you offline tape during rewind? 20 * test using file system on tape 21 */ 22 #include "../machine/pte.h" 23 24 #include "param.h" 25 #include "systm.h" 26 #include "buf.h" 27 #include "dir.h" 28 #include "conf.h" 29 #include "user.h" 30 #include "file.h" 31 #include "map.h" 32 #include "vm.h" 33 #include "ioctl.h" 34 #include "mtio.h" 35 #include "cmap.h" 36 #include "uio.h" 37 #include "kernel.h" 38 #include "tty.h" 39 40 #include "../vax/cpu.h" 41 #include "ubareg.h" 42 #include "ubavar.h" 43 #include "tmreg.h" 44 45 /* 46 * There is a ctmbuf per tape controller. 47 * It is used as the token to pass to the internal routines 48 * to execute tape ioctls, and also acts as a lock on the slaves 49 * on the controller, since there is only one per controller. 50 * In particular, when the tape is rewinding on close we release 51 * the user process but any further attempts to use the tape drive 52 * before the rewind completes will hang waiting for ctmbuf. 53 */ 54 struct buf ctmbuf[NTM]; 55 56 /* 57 * Raw tape operations use rtmbuf. The driver 58 * notices when rtmbuf is being used and allows the user 59 * program to continue after errors and read records 60 * not of the standard length (BSIZE). 61 */ 62 struct buf rtmbuf[NTM]; 63 64 /* 65 * Driver unibus interface routines and variables. 66 */ 67 int tmprobe(), tmslave(), tmattach(), tmdgo(), tmintr(); 68 struct uba_ctlr *tmminfo[NTM]; 69 struct uba_device *tedinfo[NTE]; 70 struct buf teutab[NTE]; 71 short tetotm[NTE]; 72 u_short tmstd[] = { 0772520, 0 }; 73 struct uba_driver tmdriver = 74 { tmprobe, tmslave, tmattach, tmdgo, tmstd, "te", tedinfo, "tm", tmminfo, 0 }; 75 76 /* bits in minor device */ 77 #define TEUNIT(dev) (minor(dev)&03) 78 #define TMUNIT(dev) (tetotm[TEUNIT(dev)]) 79 #define T_NOREWIND 04 80 #define T_1600BPI 0x8 81 82 #define INF (daddr_t)1000000L 83 84 /* 85 * Software state per tape transport. 86 * 87 * 1. A tape drive is a unique-open device; we refuse opens when it is already. 88 * 2. We keep track of the current position on a block tape and seek 89 * before operations by forward/back spacing if necessary. 90 * 3. We remember if the last operation was a write on a tape, so if a tape 91 * is open read write and the last thing done is a write we can 92 * write a standard end of tape mark (two eofs). 93 * 4. We remember the status registers after the last command, using 94 * then internally and returning them to the SENSE ioctl. 95 * 5. We remember the last density the tape was used at. If it is 96 * not a BOT when we start using it and we are writing, we don't 97 * let the density be changed. 98 */ 99 struct te_softc { 100 char sc_openf; /* lock against multiple opens */ 101 char sc_lastiow; /* last op was a write */ 102 daddr_t sc_blkno; /* block number, for block device tape */ 103 daddr_t sc_nxrec; /* position of end of tape, if known */ 104 u_short sc_erreg; /* copy of last erreg */ 105 u_short sc_dsreg; /* copy of last dsreg */ 106 short sc_resid; /* copy of last bc */ 107 #ifdef unneeded 108 short sc_lastcmd; /* last command to handle direction changes */ 109 #endif 110 u_short sc_dens; /* prototype command with density info */ 111 short sc_tact; /* timeout is active */ 112 daddr_t sc_timo; /* time until timeout expires */ 113 struct tty *sc_ttyp; /* record user's tty for errors */ 114 } te_softc[NTE]; 115 #ifdef unneeded 116 int tmgapsdcnt; /* DEBUG */ 117 #endif 118 119 /* 120 * States for um->um_tab.b_active, the per controller state flag. 121 * This is used to sequence control in the driver. 122 */ 123 #define SSEEK 1 /* seeking */ 124 #define SIO 2 /* doing seq i/o */ 125 #define SCOM 3 /* sending control command */ 126 #define SREW 4 /* sending a drive rewind */ 127 128 /* 129 * Determine if there is a controller for 130 * a tm at address reg. Our goal is to make the 131 * device interrupt. 132 */ 133 tmprobe(reg) 134 caddr_t reg; 135 { 136 register int br, cvec; /* must be r11,r10; value-result */ 137 138 #ifdef lint 139 br = 0; cvec = br; br = cvec; 140 tmintr(0); 141 #endif 142 ((struct tmdevice *)reg)->tmcs = TM_IE; 143 /* 144 * If this is a tm11, it ought to have interrupted 145 * by now, if it isn't (ie: it is a ts04) then we just 146 * hope that it didn't interrupt, so autoconf will ignore it. 147 * Just in case, we will reference one 148 * of the more distant registers, and hope for a machine 149 * check, or similar disaster if this is a ts. 150 * 151 * Note: on an 11/780, badaddr will just generate 152 * a uba error for a ts; but our caller will notice that 153 * so we won't check for it. 154 */ 155 if (badaddr((caddr_t)&((struct tmdevice *)reg)->tmrd, 2)) 156 return (0); 157 return (sizeof (struct tmdevice)); 158 } 159 160 /* 161 * Due to a design flaw, we cannot ascertain if the tape 162 * exists or not unless it is on line - ie: unless a tape is 163 * mounted. This is too servere a restriction to bear, 164 * so all units are assumed to exist. 165 */ 166 /*ARGSUSED*/ 167 tmslave(ui, reg) 168 struct uba_device *ui; 169 caddr_t reg; 170 { 171 172 return (1); 173 } 174 175 /* 176 * Record attachment of the unit to the controller. 177 */ 178 /*ARGSUSED*/ 179 tmattach(ui) 180 struct uba_device *ui; 181 { 182 /* 183 * Tetotm is used in TMUNIT to index the ctmbuf and rtmbuf 184 * arrays given a te unit number. 185 */ 186 tetotm[ui->ui_unit] = ui->ui_mi->um_ctlr; 187 } 188 189 int tmtimer(); 190 /* 191 * Open the device. Tapes are unique open 192 * devices, so we refuse if it is already open. 193 * We also check that a tape is available, and 194 * don't block waiting here; if you want to wait 195 * for a tape you should timeout in user code. 196 */ 197 198 #ifdef AVIV 199 int tmdens[4] = { 0x6000, 0x0000, 0x2000, 0 }; 200 int tmdiag; 201 #endif AVIV 202 203 tmopen(dev, flag) 204 dev_t dev; 205 int flag; 206 { 207 register int teunit; 208 register struct uba_device *ui; 209 register struct te_softc *sc; 210 int olddens, dens; 211 int s; 212 213 teunit = TEUNIT(dev); 214 if (teunit>=NTE || (sc = &te_softc[teunit])->sc_openf || 215 (ui = tedinfo[teunit]) == 0 || ui->ui_alive == 0) 216 return (ENXIO); 217 olddens = sc->sc_dens; 218 dens = TM_IE | TM_GO | (ui->ui_slave << 8); 219 #ifndef AVIV 220 if ((minor(dev) & T_1600BPI) == 0) 221 dens |= TM_D800; 222 #else AVIV 223 dens |= tmdens[(minor(dev)>>3)&03]; 224 #endif AVIV 225 sc->sc_dens = dens; 226 get: 227 tmcommand(dev, TM_SENSE, 1); 228 if (sc->sc_erreg&TMER_SDWN) { 229 sleep((caddr_t)&lbolt, PZERO+1); 230 goto get; 231 } 232 sc->sc_dens = olddens; 233 if ((sc->sc_erreg&(TMER_SELR|TMER_TUR)) != (TMER_SELR|TMER_TUR)) { 234 uprintf("te%d: not online\n", teunit); 235 return (EIO); 236 } 237 if ((flag&FWRITE) && (sc->sc_erreg&TMER_WRL)) { 238 uprintf("te%d: no write ring\n", teunit); 239 return (EIO); 240 } 241 if ((sc->sc_erreg&TMER_BOT) == 0 && (flag&FWRITE) && 242 dens != sc->sc_dens) { 243 uprintf("te%d: can't change density in mid-tape\n", teunit); 244 return (EIO); 245 } 246 sc->sc_openf = 1; 247 sc->sc_blkno = (daddr_t)0; 248 sc->sc_nxrec = INF; 249 sc->sc_lastiow = 0; 250 sc->sc_dens = dens; 251 sc->sc_ttyp = u.u_ttyp; 252 s = spl6(); 253 if (sc->sc_tact == 0) { 254 sc->sc_timo = INF; 255 sc->sc_tact = 1; 256 timeout(tmtimer, (caddr_t)dev, 5*hz); 257 } 258 splx(s); 259 return (0); 260 } 261 262 /* 263 * Close tape device. 264 * 265 * If tape was open for writing or last operation was 266 * a write, then write two EOF's and backspace over the last one. 267 * Unless this is a non-rewinding special file, rewind the tape. 268 * Make the tape available to others. 269 */ 270 tmclose(dev, flag) 271 register dev_t dev; 272 register flag; 273 { 274 register struct te_softc *sc = &te_softc[TEUNIT(dev)]; 275 276 if (flag == FWRITE || (flag&FWRITE) && sc->sc_lastiow) { 277 tmcommand(dev, TM_WEOF, 1); 278 tmcommand(dev, TM_WEOF, 1); 279 tmcommand(dev, TM_SREV, 1); 280 } 281 if ((minor(dev)&T_NOREWIND) == 0) 282 /* 283 * 0 count means don't hang waiting for rewind complete 284 * rather ctmbuf stays busy until the operation completes 285 * preventing further opens from completing by 286 * preventing a TM_SENSE from completing. 287 */ 288 tmcommand(dev, TM_REW, 0); 289 sc->sc_openf = 0; 290 } 291 292 /* 293 * Execute a command on the tape drive 294 * a specified number of times. 295 */ 296 tmcommand(dev, com, count) 297 dev_t dev; 298 int com, count; 299 { 300 register struct buf *bp; 301 register int s; 302 303 bp = &ctmbuf[TMUNIT(dev)]; 304 s = spl5(); 305 while (bp->b_flags&B_BUSY) { 306 /* 307 * This special check is because B_BUSY never 308 * gets cleared in the non-waiting rewind case. 309 */ 310 if (bp->b_repcnt == 0 && (bp->b_flags&B_DONE)) 311 break; 312 bp->b_flags |= B_WANTED; 313 sleep((caddr_t)bp, PRIBIO); 314 } 315 bp->b_flags = B_BUSY|B_READ; 316 splx(s); 317 bp->b_dev = dev; 318 bp->b_repcnt = -count; 319 bp->b_command = com; 320 bp->b_blkno = 0; 321 tmstrategy(bp); 322 /* 323 * In case of rewind from close, don't wait. 324 * This is the only case where count can be 0. 325 */ 326 if (count == 0) 327 return; 328 iowait(bp); 329 if (bp->b_flags&B_WANTED) 330 wakeup((caddr_t)bp); 331 bp->b_flags &= B_ERROR; 332 } 333 334 /* 335 * Queue a tape operation. 336 */ 337 tmstrategy(bp) 338 register struct buf *bp; 339 { 340 int teunit = TEUNIT(bp->b_dev); 341 register struct uba_ctlr *um; 342 register struct buf *dp; 343 int s; 344 345 /* 346 * Put transfer at end of unit queue 347 */ 348 dp = &teutab[teunit]; 349 bp->av_forw = NULL; 350 s = spl5(); 351 um = tedinfo[teunit]->ui_mi; 352 if (dp->b_actf == NULL) { 353 dp->b_actf = bp; 354 /* 355 * Transport not already active... 356 * put at end of controller queue. 357 */ 358 dp->b_forw = NULL; 359 if (um->um_tab.b_actf == NULL) 360 um->um_tab.b_actf = dp; 361 else 362 um->um_tab.b_actl->b_forw = dp; 363 um->um_tab.b_actl = dp; 364 } else 365 dp->b_actl->av_forw = bp; 366 dp->b_actl = bp; 367 /* 368 * If the controller is not busy, get 369 * it going. 370 */ 371 if (um->um_tab.b_active == 0) 372 tmstart(um); 373 splx(s); 374 } 375 376 /* 377 * Start activity on a tm controller. 378 */ 379 tmstart(um) 380 register struct uba_ctlr *um; 381 { 382 register struct buf *bp, *dp; 383 register struct tmdevice *addr = (struct tmdevice *)um->um_addr; 384 register struct te_softc *sc; 385 register struct uba_device *ui; 386 int teunit, cmd; 387 daddr_t blkno; 388 389 /* 390 * Look for an idle transport on the controller. 391 */ 392 loop: 393 if ((dp = um->um_tab.b_actf) == NULL) 394 return; 395 if ((bp = dp->b_actf) == NULL) { 396 um->um_tab.b_actf = dp->b_forw; 397 goto loop; 398 } 399 teunit = TEUNIT(bp->b_dev); 400 ui = tedinfo[teunit]; 401 /* 402 * Record pre-transfer status (e.g. for TM_SENSE) 403 */ 404 sc = &te_softc[teunit]; 405 addr = (struct tmdevice *)um->um_addr; 406 addr->tmcs = (ui->ui_slave << 8); 407 sc->sc_dsreg = addr->tmcs; 408 sc->sc_erreg = addr->tmer; 409 sc->sc_resid = addr->tmbc; 410 /* 411 * Default is that last command was NOT a write command; 412 * if we do a write command we will notice this in tmintr(). 413 */ 414 sc->sc_lastiow = 0; 415 if (sc->sc_openf < 0 || (addr->tmcs&TM_CUR) == 0) { 416 /* 417 * Have had a hard error on a non-raw tape 418 * or the tape unit is now unavailable 419 * (e.g. taken off line). 420 */ 421 bp->b_flags |= B_ERROR; 422 goto next; 423 } 424 if (bp == &ctmbuf[TMUNIT(bp->b_dev)]) { 425 /* 426 * Execute control operation with the specified count. 427 */ 428 if (bp->b_command == TM_SENSE) 429 goto next; 430 /* 431 * Set next state; give 5 minutes to complete 432 * rewind, or 10 seconds per iteration (minimum 60 433 * seconds and max 5 minutes) to complete other ops. 434 */ 435 if (bp->b_command == TM_REW) { 436 um->um_tab.b_active = SREW; 437 sc->sc_timo = 5 * 60; 438 } else { 439 um->um_tab.b_active = SCOM; 440 sc->sc_timo = 441 imin(imax(10*(int)-bp->b_repcnt,60),5*60); 442 } 443 if (bp->b_command == TM_SFORW || bp->b_command == TM_SREV) 444 addr->tmbc = bp->b_repcnt; 445 goto dobpcmd; 446 } 447 /* 448 * The following checks handle boundary cases for operation 449 * on non-raw tapes. On raw tapes the initialization of 450 * sc->sc_nxrec by tmphys causes them to be skipped normally 451 * (except in the case of retries). 452 */ 453 if (bdbtofsb(bp->b_blkno) > sc->sc_nxrec) { 454 /* 455 * Can't read past known end-of-file. 456 */ 457 bp->b_flags |= B_ERROR; 458 bp->b_error = ENXIO; 459 goto next; 460 } 461 if (bdbtofsb(bp->b_blkno) == sc->sc_nxrec && 462 bp->b_flags&B_READ) { 463 /* 464 * Reading at end of file returns 0 bytes. 465 */ 466 bp->b_resid = bp->b_bcount; 467 clrbuf(bp); 468 goto next; 469 } 470 if ((bp->b_flags&B_READ) == 0) 471 /* 472 * Writing sets EOF 473 */ 474 sc->sc_nxrec = bdbtofsb(bp->b_blkno) + 1; 475 /* 476 * If the data transfer command is in the correct place, 477 * set up all the registers except the csr, and give 478 * control over to the UNIBUS adapter routines, to 479 * wait for resources to start the i/o. 480 */ 481 if ((blkno = sc->sc_blkno) == bdbtofsb(bp->b_blkno)) { 482 addr->tmbc = -bp->b_bcount; 483 if ((bp->b_flags&B_READ) == 0) { 484 if (um->um_tab.b_errcnt) 485 cmd = TM_WIRG; 486 else 487 cmd = TM_WCOM; 488 } else 489 cmd = TM_RCOM; 490 um->um_tab.b_active = SIO; 491 um->um_cmd = sc->sc_dens|cmd; 492 #ifdef notdef 493 if (tmreverseop(sc->sc_lastcmd)) 494 while (addr->tmer & TMER_SDWN) 495 DELAY(10),tmgapsdcnt++; 496 sc->sc_lastcmd = TM_RCOM; /* will serve */ 497 #endif 498 sc->sc_timo = 60; /* premature, but should serve */ 499 (void) ubago(ui); 500 return; 501 } 502 /* 503 * Tape positioned incorrectly; 504 * set to seek forwards or backwards to the correct spot. 505 * This happens for raw tapes only on error retries. 506 */ 507 um->um_tab.b_active = SSEEK; 508 if (blkno < bdbtofsb(bp->b_blkno)) { 509 bp->b_command = TM_SFORW; 510 addr->tmbc = blkno - bdbtofsb(bp->b_blkno); 511 } else { 512 bp->b_command = TM_SREV; 513 addr->tmbc = bdbtofsb(bp->b_blkno) - blkno; 514 } 515 sc->sc_timo = imin(imax(10 * -addr->tmbc, 60), 5 * 60); 516 dobpcmd: 517 #ifdef notdef 518 /* 519 * It is strictly necessary to wait for the tape 520 * to stop before changing directions, but the TC11 521 * handles this for us. 522 */ 523 if (tmreverseop(sc->sc_lastcmd) != tmreverseop(bp->b_command)) 524 while (addr->tmer & TM_SDWN) 525 DELAY(10),tmgapsdcnt++; 526 sc->sc_lastcmd = bp->b_command; 527 #endif 528 /* 529 * Do the command in bp. 530 */ 531 addr->tmcs = (sc->sc_dens | bp->b_command); 532 return; 533 534 next: 535 /* 536 * Done with this operation due to error or 537 * the fact that it doesn't do anything. 538 * Release UBA resources (if any), dequeue 539 * the transfer and continue processing this slave. 540 */ 541 if (um->um_ubinfo) 542 ubadone(um); 543 um->um_tab.b_errcnt = 0; 544 dp->b_actf = bp->av_forw; 545 iodone(bp); 546 goto loop; 547 } 548 549 /* 550 * The UNIBUS resources we needed have been 551 * allocated to us; start the device. 552 */ 553 tmdgo(um) 554 register struct uba_ctlr *um; 555 { 556 register struct tmdevice *addr = (struct tmdevice *)um->um_addr; 557 558 addr->tmba = um->um_ubinfo; 559 addr->tmcs = um->um_cmd | ((um->um_ubinfo >> 12) & 0x30); 560 } 561 562 /* 563 * Tm interrupt routine. 564 */ 565 /*ARGSUSED*/ 566 tmintr(tm11) 567 int tm11; 568 { 569 struct buf *dp; 570 register struct buf *bp; 571 register struct uba_ctlr *um = tmminfo[tm11]; 572 register struct tmdevice *addr; 573 register struct te_softc *sc; 574 int teunit; 575 register state; 576 577 if ((dp = um->um_tab.b_actf) == NULL) 578 return; 579 bp = dp->b_actf; 580 teunit = TEUNIT(bp->b_dev); 581 addr = (struct tmdevice *)tedinfo[teunit]->ui_addr; 582 sc = &te_softc[teunit]; 583 /* 584 * If last command was a rewind, and tape is still 585 * rewinding, wait for the rewind complete interrupt. 586 */ 587 if (um->um_tab.b_active == SREW) { 588 um->um_tab.b_active = SCOM; 589 if (addr->tmer&TMER_RWS) { 590 sc->sc_timo = 5*60; /* 5 minutes */ 591 return; 592 } 593 } 594 /* 595 * An operation completed... record status 596 */ 597 sc->sc_timo = INF; 598 sc->sc_dsreg = addr->tmcs; 599 sc->sc_erreg = addr->tmer; 600 sc->sc_resid = addr->tmbc; 601 if ((bp->b_flags & B_READ) == 0) 602 sc->sc_lastiow = 1; 603 state = um->um_tab.b_active; 604 um->um_tab.b_active = 0; 605 /* 606 * Check for errors. 607 */ 608 if (addr->tmcs&TM_ERR) { 609 while (addr->tmer & TMER_SDWN) 610 DELAY(10); /* await settle down */ 611 /* 612 * If we hit the end of the tape file, update our position. 613 */ 614 if (addr->tmer&TMER_EOF) { 615 tmseteof(bp); /* set blkno and nxrec */ 616 state = SCOM; /* force completion */ 617 /* 618 * Stuff bc so it will be unstuffed correctly 619 * later to get resid. 620 */ 621 addr->tmbc = -bp->b_bcount; 622 goto opdone; 623 } 624 /* 625 * If we were reading raw tape and the only error was that the 626 * record was too long, then we don't consider this an error. 627 */ 628 if (bp == &rtmbuf[TMUNIT(bp->b_dev)] && (bp->b_flags&B_READ) && 629 (addr->tmer&(TMER_HARD|TMER_SOFT)) == TMER_RLE) 630 goto ignoreerr; 631 /* 632 * If error is not hard, and this was an i/o operation 633 * retry up to 8 times. 634 */ 635 if ((addr->tmer&TMER_HARD)==0 && state==SIO) { 636 if (++um->um_tab.b_errcnt < 7) { 637 sc->sc_blkno++; 638 ubadone(um); 639 goto opcont; 640 } 641 } else 642 /* 643 * Hard or non-i/o errors on non-raw tape 644 * cause it to close. 645 */ 646 if (sc->sc_openf>0 && bp != &rtmbuf[TMUNIT(bp->b_dev)]) 647 sc->sc_openf = -1; 648 /* 649 * Couldn't recover error 650 */ 651 tprintf(sc->sc_ttyp, 652 "te%d: hard error bn%d er=%b\n", minor(bp->b_dev)&03, 653 bp->b_blkno, sc->sc_erreg, TMER_BITS); 654 #ifdef AVIV 655 if (tmdiag) { 656 addr->tmmr = DAB; 657 printf("reject code 0%o", addr->tmmr & DAB_MASK); 658 addr->tmmr = DTS; 659 if (addr->tmmr & DTS_MASK) 660 printf(", dead track 0%o", addr->tmmr & DTS_MASK); 661 addr->tmmr = RWERR; 662 printf(", read/write errors %b\n", 663 addr->tmmr & RWERR_MASK, 664 RWERR_BITS); 665 addr->tmmr = DRSENSE; 666 printf("drive sense %b, ", addr->tmmr & DRSENSE_MASK, 667 DRSENSE_BITS); 668 printf("fsr %b\n", addr->tmfsr, FSR_BITS); 669 } 670 #endif AVIV 671 bp->b_flags |= B_ERROR; 672 goto opdone; 673 } 674 /* 675 * Advance tape control FSM. 676 */ 677 ignoreerr: 678 switch (state) { 679 680 case SIO: 681 /* 682 * Read/write increments tape block number 683 */ 684 sc->sc_blkno++; 685 goto opdone; 686 687 case SCOM: 688 /* 689 * For forward/backward space record update current position. 690 */ 691 if (bp == &ctmbuf[TMUNIT(bp->b_dev)]) 692 switch (bp->b_command) { 693 694 case TM_SFORW: 695 sc->sc_blkno -= bp->b_repcnt; 696 break; 697 698 case TM_SREV: 699 sc->sc_blkno += bp->b_repcnt; 700 break; 701 } 702 goto opdone; 703 704 case SSEEK: 705 sc->sc_blkno = bdbtofsb(bp->b_blkno); 706 goto opcont; 707 708 default: 709 panic("tmintr"); 710 } 711 opdone: 712 /* 713 * Reset error count and remove 714 * from device queue. 715 */ 716 um->um_tab.b_errcnt = 0; 717 dp->b_actf = bp->av_forw; 718 /* 719 * Check resid; watch out for resid >32767 (tmbc not negative). 720 */ 721 bp->b_resid = ((int) -addr->tmbc) & 0xffff; 722 ubadone(um); 723 iodone(bp); 724 /* 725 * Circulate slave to end of controller 726 * queue to give other slaves a chance. 727 */ 728 um->um_tab.b_actf = dp->b_forw; 729 if (dp->b_actf) { 730 dp->b_forw = NULL; 731 if (um->um_tab.b_actf == NULL) 732 um->um_tab.b_actf = dp; 733 else 734 um->um_tab.b_actl->b_forw = dp; 735 um->um_tab.b_actl = dp; 736 } 737 if (um->um_tab.b_actf == 0) 738 return; 739 opcont: 740 tmstart(um); 741 } 742 743 tmtimer(dev) 744 int dev; 745 { 746 register struct te_softc *sc = &te_softc[TEUNIT(dev)]; 747 register short x; 748 749 if (sc->sc_timo != INF && (sc->sc_timo -= 5) < 0) { 750 printf("te%d: lost interrupt\n", TEUNIT(dev)); 751 sc->sc_timo = INF; 752 x = spl5(); 753 tmintr(TMUNIT(dev)); 754 (void) splx(x); 755 } 756 timeout(tmtimer, (caddr_t)dev, 5*hz); 757 } 758 759 tmseteof(bp) 760 register struct buf *bp; 761 { 762 register int teunit = TEUNIT(bp->b_dev); 763 register struct tmdevice *addr = 764 (struct tmdevice *)tedinfo[teunit]->ui_addr; 765 register struct te_softc *sc = &te_softc[teunit]; 766 767 if (bp == &ctmbuf[TMUNIT(bp->b_dev)]) { 768 if (sc->sc_blkno > bdbtofsb(bp->b_blkno)) { 769 /* reversing */ 770 sc->sc_nxrec = bdbtofsb(bp->b_blkno) - addr->tmbc; 771 sc->sc_blkno = sc->sc_nxrec; 772 } else { 773 /* spacing forward */ 774 sc->sc_blkno = bdbtofsb(bp->b_blkno) + addr->tmbc; 775 sc->sc_nxrec = sc->sc_blkno - 1; 776 } 777 return; 778 } 779 /* eof on read */ 780 sc->sc_nxrec = bdbtofsb(bp->b_blkno); 781 } 782 783 tmread(dev, uio) 784 dev_t dev; 785 struct uio *uio; 786 { 787 int errno; 788 789 errno = tmphys(dev, uio); 790 if (errno) 791 return (errno); 792 return (physio(tmstrategy, &rtmbuf[TMUNIT(dev)], dev, B_READ, minphys, uio)); 793 } 794 795 tmwrite(dev, uio) 796 dev_t dev; 797 struct uio *uio; 798 { 799 int errno; 800 801 errno = tmphys(dev, uio); 802 if (errno) 803 return (errno); 804 return (physio(tmstrategy, &rtmbuf[TMUNIT(dev)], dev, B_WRITE, minphys, uio)); 805 } 806 807 /* 808 * Check that a raw device exists. 809 * If it does, set up sc_blkno and sc_nxrec 810 * so that the tape will appear positioned correctly. 811 */ 812 tmphys(dev, uio) 813 dev_t dev; 814 struct uio *uio; 815 { 816 register int teunit = TEUNIT(dev); 817 register daddr_t a; 818 register struct te_softc *sc; 819 register struct uba_device *ui; 820 821 if (teunit >= NTE || (ui=tedinfo[teunit]) == 0 || ui->ui_alive == 0) 822 return (ENXIO); 823 sc = &te_softc[teunit]; 824 a = bdbtofsb(uio->uio_offset >> 9); 825 sc->sc_blkno = a; 826 sc->sc_nxrec = a + 1; 827 return (0); 828 } 829 830 tmreset(uban) 831 int uban; 832 { 833 register struct uba_ctlr *um; 834 register tm11, teunit; 835 register struct uba_device *ui; 836 register struct buf *dp; 837 838 for (tm11 = 0; tm11 < NTM; tm11++) { 839 if ((um = tmminfo[tm11]) == 0 || um->um_alive == 0 || 840 um->um_ubanum != uban) 841 continue; 842 printf(" tm%d", tm11); 843 um->um_tab.b_active = 0; 844 um->um_tab.b_actf = um->um_tab.b_actl = 0; 845 if (um->um_ubinfo) { 846 printf("<%d>", (um->um_ubinfo>>28)&0xf); 847 um->um_ubinfo = 0; 848 } 849 ((struct tmdevice *)(um->um_addr))->tmcs = TM_DCLR; 850 for (teunit = 0; teunit < NTE; teunit++) { 851 if ((ui = tedinfo[teunit]) == 0 || ui->ui_mi != um || 852 ui->ui_alive == 0) 853 continue; 854 dp = &teutab[teunit]; 855 dp->b_active = 0; 856 dp->b_forw = 0; 857 if (um->um_tab.b_actf == NULL) 858 um->um_tab.b_actf = dp; 859 else 860 um->um_tab.b_actl->b_forw = dp; 861 um->um_tab.b_actl = dp; 862 if (te_softc[teunit].sc_openf > 0) 863 te_softc[teunit].sc_openf = -1; 864 } 865 tmstart(um); 866 } 867 } 868 869 /*ARGSUSED*/ 870 tmioctl(dev, cmd, data, flag) 871 caddr_t data; 872 dev_t dev; 873 { 874 int teunit = TEUNIT(dev); 875 register struct te_softc *sc = &te_softc[teunit]; 876 register struct buf *bp = &ctmbuf[TMUNIT(dev)]; 877 register callcount; 878 int fcount; 879 struct mtop *mtop; 880 struct mtget *mtget; 881 /* we depend of the values and order of the MT codes here */ 882 static tmops[] = 883 {TM_WEOF,TM_SFORW,TM_SREV,TM_SFORW,TM_SREV,TM_REW,TM_OFFL,TM_SENSE}; 884 885 switch (cmd) { 886 887 case MTIOCTOP: /* tape operation */ 888 mtop = (struct mtop *)data; 889 switch (mtop->mt_op) { 890 891 case MTWEOF: 892 callcount = mtop->mt_count; 893 fcount = 1; 894 break; 895 896 case MTFSF: case MTBSF: 897 callcount = mtop->mt_count; 898 fcount = INF; 899 break; 900 901 case MTFSR: case MTBSR: 902 callcount = 1; 903 fcount = mtop->mt_count; 904 break; 905 906 case MTREW: case MTOFFL: case MTNOP: 907 callcount = 1; 908 fcount = 1; 909 break; 910 911 default: 912 return (ENXIO); 913 } 914 if (callcount <= 0 || fcount <= 0) 915 return (EINVAL); 916 while (--callcount >= 0) { 917 tmcommand(dev, tmops[mtop->mt_op], fcount); 918 if ((mtop->mt_op == MTFSR || mtop->mt_op == MTBSR) && 919 bp->b_resid) 920 return (EIO); 921 if ((bp->b_flags&B_ERROR) || sc->sc_erreg&TMER_BOT) 922 break; 923 } 924 return (geterror(bp)); 925 926 case MTIOCGET: 927 mtget = (struct mtget *)data; 928 mtget->mt_dsreg = sc->sc_dsreg; 929 mtget->mt_erreg = sc->sc_erreg; 930 mtget->mt_resid = sc->sc_resid; 931 mtget->mt_type = MT_ISTM; 932 break; 933 934 default: 935 return (ENXIO); 936 } 937 return (0); 938 } 939 940 #define DBSIZE 20 941 942 tmdump() 943 { 944 register struct uba_device *ui; 945 register struct uba_regs *up; 946 register struct tmdevice *addr; 947 int blk, num; 948 int start; 949 950 start = 0; 951 num = maxfree; 952 #define phys(a,b) ((b)((int)(a)&0x7fffffff)) 953 if (tedinfo[0] == 0) 954 return (ENXIO); 955 ui = phys(tedinfo[0], struct uba_device *); 956 up = phys(ui->ui_hd, struct uba_hd *)->uh_physuba; 957 ubainit(up); 958 DELAY(1000000); 959 addr = (struct tmdevice *)ui->ui_physaddr; 960 tmwait(addr); 961 addr->tmcs = TM_DCLR | TM_GO; 962 while (num > 0) { 963 blk = num > DBSIZE ? DBSIZE : num; 964 tmdwrite(start, blk, addr, up); 965 start += blk; 966 num -= blk; 967 } 968 tmeof(addr); 969 tmeof(addr); 970 tmwait(addr); 971 if (addr->tmcs&TM_ERR) 972 return (EIO); 973 addr->tmcs = TM_REW | TM_GO; 974 tmwait(addr); 975 return (0); 976 } 977 978 tmdwrite(dbuf, num, addr, up) 979 register dbuf, num; 980 register struct tmdevice *addr; 981 struct uba_regs *up; 982 { 983 register struct pte *io; 984 register int npf; 985 986 tmwait(addr); 987 io = up->uba_map; 988 npf = num+1; 989 while (--npf != 0) 990 *(int *)io++ = (dbuf++ | (1<<UBAMR_DPSHIFT) | UBAMR_MRV); 991 *(int *)io = 0; 992 addr->tmbc = -(num*NBPG); 993 addr->tmba = 0; 994 addr->tmcs = TM_WCOM | TM_GO; 995 } 996 997 tmwait(addr) 998 register struct tmdevice *addr; 999 { 1000 register s; 1001 1002 do 1003 s = addr->tmcs; 1004 while ((s & TM_CUR) == 0); 1005 } 1006 1007 tmeof(addr) 1008 struct tmdevice *addr; 1009 { 1010 1011 tmwait(addr); 1012 addr->tmcs = TM_WEOF | TM_GO; 1013 } 1014 #endif 1015