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 * @(#)tm.c 7.4 (Berkeley) 05/06/88 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 controller 17 * test reset code 18 * what happens if you offline tape during rewind? 19 * test using file system on tape 20 */ 21 #include "param.h" 22 #include "systm.h" 23 #include "buf.h" 24 #include "dir.h" 25 #include "conf.h" 26 #include "user.h" 27 #include "file.h" 28 #include "map.h" 29 #include "vm.h" 30 #include "ioctl.h" 31 #include "mtio.h" 32 #include "cmap.h" 33 #include "uio.h" 34 #include "kernel.h" 35 #include "tty.h" 36 #include "syslog.h" 37 38 #include "../machine/pte.h" 39 #include "../vax/cpu.h" 40 #include "ubareg.h" 41 #include "ubavar.h" 42 #include "tmreg.h" 43 44 /* 45 * There is a ctmbuf per tape controller. 46 * It is used as the token to pass to the internal routines 47 * to execute tape ioctls, and also acts as a lock on the slaves 48 * on the controller, since there is only one per controller. 49 * In particular, when the tape is rewinding on close we release 50 * the user process but any further attempts to use the tape drive 51 * before the rewind completes will hang waiting for ctmbuf. 52 */ 53 struct buf ctmbuf[NTM]; 54 55 /* 56 * Driver unibus interface routines and variables. 57 */ 58 int tmprobe(), tmslave(), tmattach(), tmdgo(), tmintr(); 59 struct uba_ctlr *tmminfo[NTM]; 60 struct uba_device *tedinfo[NTE]; 61 struct buf teutab[NTE]; 62 short tetotm[NTE]; 63 u_short tmstd[] = { 0772520, 0 }; 64 struct uba_driver tmdriver = 65 { tmprobe, tmslave, tmattach, tmdgo, tmstd, "te", tedinfo, "tm", tmminfo, 0 }; 66 67 /* bits in minor device */ 68 #define TEUNIT(dev) (minor(dev)&03) 69 #define TMUNIT(dev) (tetotm[TEUNIT(dev)]) 70 #define T_NOREWIND 04 71 #define T_1600BPI 0x8 72 73 #define INF (daddr_t)1000000L 74 75 /* 76 * Software state per tape transport. 77 * 78 * 1. A tape drive is a unique-open device; we refuse opens when it is already. 79 * 2. We keep track of the current position on a block tape and seek 80 * before operations by forward/back spacing if necessary. 81 * 3. We remember if the last operation was a write on a tape, so if a tape 82 * is open read write and the last thing done is a write we can 83 * write a standard end of tape mark (two eofs). 84 * 4. We remember the status registers after the last command, using 85 * then internally and returning them to the SENSE ioctl. 86 * 5. We remember the last density the tape was used at. If it is 87 * not a BOT when we start using it and we are writing, we don't 88 * let the density be changed. 89 */ 90 struct te_softc { 91 char sc_openf; /* lock against multiple opens */ 92 char sc_lastiow; /* last op was a write */ 93 daddr_t sc_blkno; /* block number, for block device tape */ 94 daddr_t sc_nxrec; /* position of end of tape, if known */ 95 u_short sc_erreg; /* copy of last erreg */ 96 u_short sc_ioerreg; /* copy of last erreg for I/O command */ 97 u_short sc_dsreg; /* copy of last dsreg */ 98 short sc_resid; /* copy of last bc */ 99 #ifdef unneeded 100 short sc_lastcmd; /* last command to handle direction changes */ 101 #endif 102 u_short sc_dens; /* prototype command with density info */ 103 short sc_tact; /* timeout is active */ 104 daddr_t sc_timo; /* time until timeout expires */ 105 int sc_blks; /* number of I/O operations since open */ 106 int sc_softerrs; /* number of soft I/O errors since open */ 107 struct tty *sc_ttyp; /* record user's tty for errors */ 108 } te_softc[NTE]; 109 #ifdef unneeded 110 int tmgapsdcnt; /* DEBUG */ 111 #endif 112 113 /* 114 * States for um->um_tab.b_active, the per controller state flag. 115 * This is used to sequence control in the driver. 116 */ 117 #define SSEEK 1 /* seeking */ 118 #define SIO 2 /* doing seq i/o */ 119 #define SCOM 3 /* sending control command */ 120 #define SREW 4 /* sending a drive rewind */ 121 122 /* 123 * Determine if there is a controller for 124 * a tm at address reg. Our goal is to make the 125 * device interrupt. 126 */ 127 tmprobe(reg) 128 caddr_t reg; 129 { 130 register int br, cvec; /* must be r11,r10; value-result */ 131 132 #ifdef lint 133 br = 0; cvec = br; br = cvec; 134 tmintr(0); 135 #endif 136 ((struct tmdevice *)reg)->tmcs = TM_IE; 137 /* 138 * If this is a tm11, it ought to have interrupted 139 * by now, if it isn't (ie: it is a ts04) then we just 140 * hope that it didn't interrupt, so autoconf will ignore it. 141 * Just in case, we will reference one 142 * of the more distant registers, and hope for a machine 143 * check, or similar disaster if this is a ts. 144 * 145 * Note: on an 11/780, badaddr will just generate 146 * a uba error for a ts; but our caller will notice that 147 * so we won't check for it. 148 */ 149 if (badaddr((caddr_t)&((struct tmdevice *)reg)->tmrd, 2)) 150 return (0); 151 return (sizeof (struct tmdevice)); 152 } 153 154 /* 155 * Due to a design flaw, we cannot ascertain if the tape 156 * exists or not unless it is on line - ie: unless a tape is 157 * mounted. This is too servere a restriction to bear, 158 * so all units are assumed to exist. 159 */ 160 /*ARGSUSED*/ 161 tmslave(ui, reg) 162 struct uba_device *ui; 163 caddr_t reg; 164 { 165 166 return (1); 167 } 168 169 /* 170 * Record attachment of the unit to the controller. 171 */ 172 /*ARGSUSED*/ 173 tmattach(ui) 174 struct uba_device *ui; 175 { 176 /* 177 * Tetotm is used in TMUNIT to index the ctmbuf 178 * array given a te unit number. 179 */ 180 tetotm[ui->ui_unit] = ui->ui_mi->um_ctlr; 181 } 182 183 int tmtimer(); 184 /* 185 * Open the device. Tapes are unique open 186 * devices, so we refuse if it is already open. 187 * We also check that a tape is available, and 188 * don't block waiting here; if you want to wait 189 * for a tape you should timeout in user code. 190 */ 191 192 #ifdef AVIV 193 int tmdens[4] = { 0x6000, 0x0000, 0x2000, 0 }; 194 #endif AVIV 195 int tmdiag; 196 197 tmopen(dev, flag) 198 dev_t dev; 199 int flag; 200 { 201 register int teunit; 202 register struct uba_device *ui; 203 register struct te_softc *sc; 204 int olddens, dens; 205 int s; 206 207 teunit = TEUNIT(dev); 208 if (teunit>=NTE || (ui = tedinfo[teunit]) == 0 || ui->ui_alive == 0) 209 return (ENXIO); 210 if ((sc = &te_softc[teunit])->sc_openf) 211 return (EBUSY); 212 sc->sc_openf = 1; 213 olddens = sc->sc_dens; 214 dens = TM_IE | TM_GO | (ui->ui_slave << 8); 215 #ifndef AVIV 216 if ((minor(dev) & T_1600BPI) == 0) 217 dens |= TM_D800; 218 #else AVIV 219 dens |= tmdens[(minor(dev)>>3)&03]; 220 #endif AVIV 221 sc->sc_dens = dens; 222 get: 223 tmcommand(dev, TM_SENSE, 1); 224 if (sc->sc_erreg&TMER_SDWN) { 225 sleep((caddr_t)&lbolt, PZERO+1); 226 goto get; 227 } 228 sc->sc_dens = olddens; 229 if ((sc->sc_erreg&(TMER_SELR|TMER_TUR)) != (TMER_SELR|TMER_TUR)) { 230 uprintf("te%d: not online\n", teunit); 231 sc->sc_openf = 0; 232 return (EIO); 233 } 234 if ((flag&FWRITE) && (sc->sc_erreg&TMER_WRL)) { 235 uprintf("te%d: no write ring\n", teunit); 236 sc->sc_openf = 0; 237 return (EIO); 238 } 239 if ((sc->sc_erreg&TMER_BOT) == 0 && (flag&FWRITE) && 240 dens != sc->sc_dens) { 241 uprintf("te%d: can't change density in mid-tape\n", teunit); 242 sc->sc_openf = 0; 243 return (EIO); 244 } 245 sc->sc_blkno = (daddr_t)0; 246 sc->sc_nxrec = INF; 247 sc->sc_lastiow = 0; 248 sc->sc_dens = dens; 249 sc->sc_blks = 0; 250 sc->sc_softerrs = 0; 251 sc->sc_ttyp = u.u_ttyp; 252 s = splclock(); 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 if (sc->sc_blks > 100 && sc->sc_softerrs > sc->sc_blks / 100) 290 log(LOG_INFO, "te%d: %d soft errors in %d blocks\n", 291 TEUNIT(dev), sc->sc_softerrs, sc->sc_blks); 292 sc->sc_openf = 0; 293 return (0); 294 } 295 296 /* 297 * Execute a command on the tape drive 298 * a specified number of times. 299 */ 300 tmcommand(dev, com, count) 301 dev_t dev; 302 int com, count; 303 { 304 register struct buf *bp; 305 register int s; 306 307 bp = &ctmbuf[TMUNIT(dev)]; 308 s = spl5(); 309 while (bp->b_flags&B_BUSY) { 310 /* 311 * This special check is because B_BUSY never 312 * gets cleared in the non-waiting rewind case. 313 */ 314 if (bp->b_repcnt == 0 && (bp->b_flags&B_DONE)) 315 break; 316 bp->b_flags |= B_WANTED; 317 sleep((caddr_t)bp, PRIBIO); 318 } 319 bp->b_flags = B_BUSY|B_READ; 320 splx(s); 321 bp->b_dev = dev; 322 bp->b_repcnt = -count; 323 bp->b_command = com; 324 bp->b_blkno = 0; 325 tmstrategy(bp); 326 /* 327 * In case of rewind from close, don't wait. 328 * This is the only case where count can be 0. 329 */ 330 if (count == 0) 331 return; 332 iowait(bp); 333 if (bp->b_flags&B_WANTED) 334 wakeup((caddr_t)bp); 335 bp->b_flags &= B_ERROR; 336 } 337 338 /* 339 * Queue a tape operation. 340 */ 341 tmstrategy(bp) 342 register struct buf *bp; 343 { 344 int teunit = TEUNIT(bp->b_dev); 345 register struct uba_ctlr *um; 346 register struct buf *dp; 347 int s; 348 349 /* 350 * Put transfer at end of unit queue 351 */ 352 dp = &teutab[teunit]; 353 bp->av_forw = NULL; 354 s = spl5(); 355 um = tedinfo[teunit]->ui_mi; 356 if (dp->b_actf == NULL) { 357 dp->b_actf = bp; 358 /* 359 * Transport not already active... 360 * put at end of controller queue. 361 */ 362 dp->b_forw = NULL; 363 if (um->um_tab.b_actf == NULL) 364 um->um_tab.b_actf = dp; 365 else 366 um->um_tab.b_actl->b_forw = dp; 367 um->um_tab.b_actl = dp; 368 } else 369 dp->b_actl->av_forw = bp; 370 dp->b_actl = bp; 371 /* 372 * If the controller is not busy, get 373 * it going. 374 */ 375 if (um->um_tab.b_active == 0) 376 tmstart(um); 377 splx(s); 378 } 379 380 /* 381 * Start activity on a tm controller. 382 */ 383 tmstart(um) 384 register struct uba_ctlr *um; 385 { 386 register struct buf *bp, *dp; 387 register struct tmdevice *addr = (struct tmdevice *)um->um_addr; 388 register struct te_softc *sc; 389 register struct uba_device *ui; 390 int teunit, cmd; 391 daddr_t blkno; 392 393 /* 394 * Look for an idle transport on the controller. 395 */ 396 loop: 397 if ((dp = um->um_tab.b_actf) == NULL) 398 return; 399 if ((bp = dp->b_actf) == NULL) { 400 um->um_tab.b_actf = dp->b_forw; 401 goto loop; 402 } 403 teunit = TEUNIT(bp->b_dev); 404 ui = tedinfo[teunit]; 405 /* 406 * Record pre-transfer status (e.g. for TM_SENSE) 407 */ 408 sc = &te_softc[teunit]; 409 addr = (struct tmdevice *)um->um_addr; 410 addr->tmcs = (ui->ui_slave << 8); 411 sc->sc_dsreg = addr->tmcs; 412 sc->sc_erreg = addr->tmer; 413 sc->sc_resid = addr->tmbc; 414 /* 415 * Default is that last command was NOT a write command; 416 * if we do a write command we will notice this in tmintr(). 417 */ 418 sc->sc_lastiow = 0; 419 if (sc->sc_openf < 0 || (addr->tmcs&TM_CUR) == 0) { 420 /* 421 * Have had a hard error on a non-raw tape 422 * or the tape unit is now unavailable 423 * (e.g. taken off line). 424 */ 425 bp->b_flags |= B_ERROR; 426 goto next; 427 } 428 if (bp == &ctmbuf[TMUNIT(bp->b_dev)]) { 429 /* 430 * Execute control operation with the specified count. 431 */ 432 if (bp->b_command == TM_SENSE) 433 goto next; 434 /* 435 * Set next state; give 5 minutes to complete 436 * rewind, or 10 seconds per iteration (minimum 60 437 * seconds and max 5 minutes) to complete other ops. 438 */ 439 if (bp->b_command == TM_REW) { 440 um->um_tab.b_active = SREW; 441 sc->sc_timo = 5 * 60; 442 } else { 443 um->um_tab.b_active = SCOM; 444 sc->sc_timo = 445 imin(imax(10*(int)-bp->b_repcnt,60),5*60); 446 } 447 if (bp->b_command == TM_SFORW || bp->b_command == TM_SREV) 448 addr->tmbc = bp->b_repcnt; 449 goto dobpcmd; 450 } 451 /* 452 * For raw I/O, save the current block 453 * number in case we have to retry. 454 */ 455 if (bp->b_flags & B_RAW) { 456 if (um->um_tab.b_errcnt == 0) { 457 sc->sc_blkno = bdbtofsb(bp->b_blkno); 458 sc->sc_nxrec = sc->sc_blkno + 1; 459 } 460 } 461 else { 462 /* 463 * Handle boundary cases for operation 464 * on non-raw tapes. 465 */ 466 if (bdbtofsb(bp->b_blkno) > sc->sc_nxrec) { 467 /* 468 * Can't read past known end-of-file. 469 */ 470 bp->b_flags |= B_ERROR; 471 bp->b_error = ENXIO; 472 goto next; 473 } 474 if (bdbtofsb(bp->b_blkno) == sc->sc_nxrec && 475 bp->b_flags&B_READ) { 476 /* 477 * Reading at end of file returns 0 bytes. 478 */ 479 bp->b_resid = bp->b_bcount; 480 clrbuf(bp); 481 goto next; 482 } 483 if ((bp->b_flags&B_READ) == 0) 484 /* 485 * Writing sets EOF 486 */ 487 sc->sc_nxrec = bdbtofsb(bp->b_blkno) + 1; 488 } 489 /* 490 * If the data transfer command is in the correct place, 491 * set up all the registers except the csr, and give 492 * control over to the UNIBUS adapter routines, to 493 * wait for resources to start the i/o. 494 */ 495 if ((blkno = sc->sc_blkno) == bdbtofsb(bp->b_blkno)) { 496 addr->tmbc = -bp->b_bcount; 497 if ((bp->b_flags&B_READ) == 0) { 498 if (um->um_tab.b_errcnt && 499 (sc->sc_ioerreg&(TMER_HARD|TMER_SOFT)) != TMER_BGL) 500 cmd = TM_WIRG; 501 else 502 cmd = TM_WCOM; 503 } else 504 cmd = TM_RCOM; 505 um->um_tab.b_active = SIO; 506 um->um_cmd = sc->sc_dens|cmd; 507 #ifdef notdef 508 if (tmreverseop(sc->sc_lastcmd)) 509 while (addr->tmer & TMER_SDWN) 510 DELAY(10),tmgapsdcnt++; 511 sc->sc_lastcmd = TM_RCOM; /* will serve */ 512 #endif 513 sc->sc_timo = 60; /* premature, but should serve */ 514 (void) ubago(ui); 515 return; 516 } 517 /* 518 * Tape positioned incorrectly; 519 * set to seek forwards or backwards to the correct spot. 520 * This happens for raw tapes only on error retries. 521 */ 522 um->um_tab.b_active = SSEEK; 523 if (blkno < bdbtofsb(bp->b_blkno)) { 524 bp->b_command = TM_SFORW; 525 addr->tmbc = blkno - bdbtofsb(bp->b_blkno); 526 } else { 527 bp->b_command = TM_SREV; 528 addr->tmbc = bdbtofsb(bp->b_blkno) - blkno; 529 } 530 sc->sc_timo = imin(imax(10 * -addr->tmbc, 60), 5 * 60); 531 dobpcmd: 532 #ifdef notdef 533 /* 534 * It is strictly necessary to wait for the tape 535 * to stop before changing directions, but the TC11 536 * handles this for us. 537 */ 538 if (tmreverseop(sc->sc_lastcmd) != tmreverseop(bp->b_command)) 539 while (addr->tmer & TM_SDWN) 540 DELAY(10),tmgapsdcnt++; 541 sc->sc_lastcmd = bp->b_command; 542 #endif 543 /* 544 * Do the command in bp. 545 */ 546 addr->tmcs = (sc->sc_dens | bp->b_command); 547 return; 548 549 next: 550 /* 551 * Done with this operation due to error or 552 * the fact that it doesn't do anything. 553 * Release UBA resources (if any), dequeue 554 * the transfer and continue processing this slave. 555 */ 556 if (um->um_ubinfo) 557 ubadone(um); 558 um->um_tab.b_errcnt = 0; 559 dp->b_actf = bp->av_forw; 560 iodone(bp); 561 goto loop; 562 } 563 564 /* 565 * The UNIBUS resources we needed have been 566 * allocated to us; start the device. 567 */ 568 tmdgo(um) 569 register struct uba_ctlr *um; 570 { 571 register struct tmdevice *addr = (struct tmdevice *)um->um_addr; 572 573 addr->tmba = um->um_ubinfo; 574 addr->tmcs = um->um_cmd | ((um->um_ubinfo >> 12) & 0x30); 575 } 576 577 /* 578 * Tm interrupt routine. 579 */ 580 /*ARGSUSED*/ 581 tmintr(tm11) 582 int tm11; 583 { 584 struct buf *dp; 585 register struct buf *bp; 586 register struct uba_ctlr *um = tmminfo[tm11]; 587 register struct tmdevice *addr; 588 register struct te_softc *sc; 589 int teunit; 590 register state; 591 592 if ((dp = um->um_tab.b_actf) == NULL) 593 return; 594 bp = dp->b_actf; 595 teunit = TEUNIT(bp->b_dev); 596 addr = (struct tmdevice *)tedinfo[teunit]->ui_addr; 597 sc = &te_softc[teunit]; 598 /* 599 * If last command was a rewind, and tape is still 600 * rewinding, wait for the rewind complete interrupt. 601 */ 602 if (um->um_tab.b_active == SREW) { 603 um->um_tab.b_active = SCOM; 604 if (addr->tmer&TMER_RWS) { 605 sc->sc_timo = 5*60; /* 5 minutes */ 606 return; 607 } 608 } 609 /* 610 * An operation completed... record status 611 */ 612 sc->sc_timo = INF; 613 if (um->um_tab.b_active = SIO) 614 sc->sc_ioerreg = addr->tmer; 615 sc->sc_dsreg = addr->tmcs; 616 sc->sc_erreg = addr->tmer; 617 sc->sc_resid = addr->tmbc; 618 if ((bp->b_flags & B_READ) == 0) 619 sc->sc_lastiow = 1; 620 state = um->um_tab.b_active; 621 um->um_tab.b_active = 0; 622 /* 623 * Check for errors. 624 */ 625 if (addr->tmcs&TM_ERR) { 626 while (addr->tmer & TMER_SDWN) 627 DELAY(10); /* await settle down */ 628 /* 629 * If we hit the end of the tape file, update our position. 630 */ 631 if (addr->tmer&TMER_EOF) { 632 tmseteof(bp); /* set blkno and nxrec */ 633 state = SCOM; /* force completion */ 634 /* 635 * Stuff bc so it will be unstuffed correctly 636 * later to get resid. 637 */ 638 addr->tmbc = -bp->b_bcount; 639 goto opdone; 640 } 641 /* 642 * If we were reading raw tape and the only error was that the 643 * record was too long, then we don't consider this an error. 644 */ 645 if ((bp->b_flags & (B_READ|B_RAW)) == (B_READ|B_RAW) && 646 (addr->tmer&(TMER_HARD|TMER_SOFT)) == TMER_RLE) 647 goto ignoreerr; 648 /* 649 * If error is not hard, and this was an i/o operation 650 * retry up to 8 times. 651 */ 652 if ((addr->tmer&TMER_HARD)==0 && state==SIO) { 653 if (++um->um_tab.b_errcnt < 7) { 654 if (tmdiag) 655 log(LOG_DEBUG, 656 "te%d: soft error bn%d er=%b\n", 657 minor(bp->b_dev)&03, 658 bp->b_blkno, sc->sc_erreg, 659 TMER_BITS); 660 sc->sc_blkno++; 661 ubadone(um); 662 goto opcont; 663 } 664 } else 665 /* 666 * Hard or non-i/o errors on non-raw tape 667 * cause it to close. 668 */ 669 if ((bp->b_flags&B_RAW) == 0 && sc->sc_openf > 0) 670 sc->sc_openf = -1; 671 /* 672 * Couldn't recover error 673 */ 674 tprintf(sc->sc_ttyp, 675 "te%d: hard error bn%d er=%b\n", minor(bp->b_dev)&03, 676 bp->b_blkno, sc->sc_erreg, TMER_BITS); 677 #ifdef AVIV 678 if (tmdiag) { 679 addr->tmmr = DAB; 680 printf("reject code 0%o", addr->tmmr & DAB_MASK); 681 addr->tmmr = DTS; 682 if (addr->tmmr & DTS_MASK) 683 printf(", dead track 0%o", addr->tmmr & DTS_MASK); 684 addr->tmmr = RWERR; 685 printf(", read/write errors %b\n", 686 addr->tmmr & RWERR_MASK, 687 RWERR_BITS); 688 addr->tmmr = DRSENSE; 689 printf("drive sense %b, ", addr->tmmr & DRSENSE_MASK, 690 DRSENSE_BITS); 691 printf("fsr %b\n", addr->tmfsr, FSR_BITS); 692 } 693 #endif AVIV 694 bp->b_flags |= B_ERROR; 695 goto opdone; 696 } 697 /* 698 * Advance tape control FSM. 699 */ 700 ignoreerr: 701 switch (state) { 702 703 case SIO: 704 /* 705 * Read/write increments tape block number 706 */ 707 sc->sc_blkno++; 708 sc->sc_blks++; 709 if (um->um_tab.b_errcnt) 710 sc->sc_softerrs++; 711 goto opdone; 712 713 case SCOM: 714 /* 715 * For forward/backward space record update current position. 716 */ 717 if (bp == &ctmbuf[TMUNIT(bp->b_dev)]) 718 switch ((int)bp->b_command) { 719 720 case TM_SFORW: 721 sc->sc_blkno -= bp->b_repcnt; 722 break; 723 724 case TM_SREV: 725 sc->sc_blkno += bp->b_repcnt; 726 break; 727 } 728 goto opdone; 729 730 case SSEEK: 731 sc->sc_blkno = bdbtofsb(bp->b_blkno); 732 goto opcont; 733 734 default: 735 panic("tmintr"); 736 } 737 opdone: 738 /* 739 * Reset error count and remove 740 * from device queue. 741 */ 742 um->um_tab.b_errcnt = 0; 743 dp->b_actf = bp->av_forw; 744 /* 745 * Check resid; watch out for resid >32767 (tmbc not negative). 746 */ 747 bp->b_resid = ((int) -addr->tmbc) & 0xffff; 748 ubadone(um); 749 iodone(bp); 750 /* 751 * Circulate slave to end of controller 752 * queue to give other slaves a chance. 753 */ 754 um->um_tab.b_actf = dp->b_forw; 755 if (dp->b_actf) { 756 dp->b_forw = NULL; 757 if (um->um_tab.b_actf == NULL) 758 um->um_tab.b_actf = dp; 759 else 760 um->um_tab.b_actl->b_forw = dp; 761 um->um_tab.b_actl = dp; 762 } 763 if (um->um_tab.b_actf == 0) 764 return; 765 opcont: 766 tmstart(um); 767 } 768 769 tmtimer(dev) 770 int dev; 771 { 772 register struct te_softc *sc = &te_softc[TEUNIT(dev)]; 773 register short x; 774 775 if (sc->sc_timo != INF && (sc->sc_timo -= 5) < 0) { 776 printf("te%d: lost interrupt\n", TEUNIT(dev)); 777 sc->sc_timo = INF; 778 x = spl5(); 779 tmintr(TMUNIT(dev)); 780 (void) splx(x); 781 } 782 timeout(tmtimer, (caddr_t)dev, 5*hz); 783 } 784 785 tmseteof(bp) 786 register struct buf *bp; 787 { 788 register int teunit = TEUNIT(bp->b_dev); 789 register struct tmdevice *addr = 790 (struct tmdevice *)tedinfo[teunit]->ui_addr; 791 register struct te_softc *sc = &te_softc[teunit]; 792 793 if (bp == &ctmbuf[TMUNIT(bp->b_dev)]) { 794 if (sc->sc_blkno > bdbtofsb(bp->b_blkno)) { 795 /* reversing */ 796 sc->sc_nxrec = bdbtofsb(bp->b_blkno) - addr->tmbc; 797 sc->sc_blkno = sc->sc_nxrec; 798 } else { 799 /* spacing forward */ 800 sc->sc_blkno = bdbtofsb(bp->b_blkno) + addr->tmbc; 801 sc->sc_nxrec = sc->sc_blkno - 1; 802 } 803 return; 804 } 805 /* eof on read */ 806 sc->sc_nxrec = bdbtofsb(bp->b_blkno); 807 } 808 809 tmreset(uban) 810 int uban; 811 { 812 register struct uba_ctlr *um; 813 register tm11, teunit; 814 register struct uba_device *ui; 815 register struct buf *dp; 816 817 for (tm11 = 0; tm11 < NTM; tm11++) { 818 if ((um = tmminfo[tm11]) == 0 || um->um_alive == 0 || 819 um->um_ubanum != uban) 820 continue; 821 printf(" tm%d", tm11); 822 um->um_tab.b_active = 0; 823 um->um_tab.b_actf = um->um_tab.b_actl = 0; 824 if (um->um_ubinfo) { 825 printf("<%d>", (um->um_ubinfo>>28)&0xf); 826 um->um_ubinfo = 0; 827 } 828 ((struct tmdevice *)(um->um_addr))->tmcs = TM_DCLR; 829 for (teunit = 0; teunit < NTE; teunit++) { 830 if ((ui = tedinfo[teunit]) == 0 || ui->ui_mi != um || 831 ui->ui_alive == 0) 832 continue; 833 dp = &teutab[teunit]; 834 dp->b_active = 0; 835 dp->b_forw = 0; 836 if (um->um_tab.b_actf == NULL) 837 um->um_tab.b_actf = dp; 838 else 839 um->um_tab.b_actl->b_forw = dp; 840 um->um_tab.b_actl = dp; 841 if (te_softc[teunit].sc_openf > 0) 842 te_softc[teunit].sc_openf = -1; 843 } 844 tmstart(um); 845 } 846 } 847 848 /*ARGSUSED*/ 849 tmioctl(dev, cmd, data, flag) 850 caddr_t data; 851 dev_t dev; 852 { 853 int teunit = TEUNIT(dev); 854 register struct te_softc *sc = &te_softc[teunit]; 855 register struct buf *bp = &ctmbuf[TMUNIT(dev)]; 856 register callcount; 857 int fcount; 858 struct mtop *mtop; 859 struct mtget *mtget; 860 /* we depend of the values and order of the MT codes here */ 861 static tmops[] = 862 {TM_WEOF,TM_SFORW,TM_SREV,TM_SFORW,TM_SREV,TM_REW,TM_OFFL,TM_SENSE}; 863 864 switch (cmd) { 865 866 case MTIOCTOP: /* tape operation */ 867 mtop = (struct mtop *)data; 868 switch (mtop->mt_op) { 869 870 case MTWEOF: 871 callcount = mtop->mt_count; 872 fcount = 1; 873 break; 874 875 case MTFSF: case MTBSF: 876 callcount = mtop->mt_count; 877 fcount = INF; 878 break; 879 880 case MTFSR: case MTBSR: 881 callcount = 1; 882 fcount = mtop->mt_count; 883 break; 884 885 case MTREW: case MTOFFL: case MTNOP: 886 callcount = 1; 887 fcount = 1; 888 break; 889 890 default: 891 return (ENXIO); 892 } 893 if (callcount <= 0 || fcount <= 0) 894 return (EINVAL); 895 while (--callcount >= 0) { 896 tmcommand(dev, tmops[mtop->mt_op], fcount); 897 if ((mtop->mt_op == MTFSR || mtop->mt_op == MTBSR) && 898 bp->b_resid) 899 return (EIO); 900 if ((bp->b_flags&B_ERROR) || sc->sc_erreg&TMER_BOT) 901 break; 902 } 903 return (geterror(bp)); 904 905 case MTIOCGET: 906 mtget = (struct mtget *)data; 907 mtget->mt_dsreg = sc->sc_dsreg; 908 mtget->mt_erreg = sc->sc_erreg; 909 mtget->mt_resid = sc->sc_resid; 910 mtget->mt_type = MT_ISTM; 911 break; 912 913 default: 914 return (ENXIO); 915 } 916 return (0); 917 } 918 919 #define DBSIZE 20 920 921 tmdump() 922 { 923 register struct uba_device *ui; 924 register struct uba_regs *up; 925 register struct tmdevice *addr; 926 int blk, num; 927 int start; 928 929 start = 0; 930 num = maxfree; 931 #define phys(a,b) ((b)((int)(a)&0x7fffffff)) 932 if (tedinfo[0] == 0) 933 return (ENXIO); 934 ui = phys(tedinfo[0], struct uba_device *); 935 up = phys(ui->ui_hd, struct uba_hd *)->uh_physuba; 936 ubainit(up); 937 DELAY(1000000); 938 addr = (struct tmdevice *)ui->ui_physaddr; 939 tmwait(addr); 940 addr->tmcs = TM_DCLR | TM_GO; 941 while (num > 0) { 942 blk = num > DBSIZE ? DBSIZE : num; 943 tmdwrite(start, blk, addr, up); 944 start += blk; 945 num -= blk; 946 } 947 tmeof(addr); 948 tmeof(addr); 949 tmwait(addr); 950 if (addr->tmcs&TM_ERR) 951 return (EIO); 952 addr->tmcs = TM_REW | TM_GO; 953 tmwait(addr); 954 return (0); 955 } 956 957 tmdwrite(dbuf, num, addr, up) 958 register dbuf, num; 959 register struct tmdevice *addr; 960 struct uba_regs *up; 961 { 962 register struct pte *io; 963 register int npf; 964 965 tmwait(addr); 966 io = up->uba_map; 967 npf = num+1; 968 while (--npf != 0) 969 *(int *)io++ = (dbuf++ | (1<<UBAMR_DPSHIFT) | UBAMR_MRV); 970 *(int *)io = 0; 971 addr->tmbc = -(num*NBPG); 972 addr->tmba = 0; 973 addr->tmcs = TM_WCOM | TM_GO; 974 } 975 976 tmwait(addr) 977 register struct tmdevice *addr; 978 { 979 register s; 980 981 do 982 s = addr->tmcs; 983 while ((s & TM_CUR) == 0); 984 } 985 986 tmeof(addr) 987 struct tmdevice *addr; 988 { 989 990 tmwait(addr); 991 addr->tmcs = TM_WEOF | TM_GO; 992 } 993 #endif 994