1 /* ht.c 4.21 82/01/17 */ 2 3 #include "tu.h" 4 #if NHT > 0 5 /* 6 * TM03/TU?? tape driver 7 * 8 * TODO: 9 * cleanup messages on errors 10 * test ioctl's 11 * see how many rewind interrups we get if we kick when not at BOT 12 * fixup rle error on block tape code 13 */ 14 #include "../h/param.h" 15 #include "../h/systm.h" 16 #include "../h/buf.h" 17 #include "../h/conf.h" 18 #include "../h/dir.h" 19 #include "../h/file.h" 20 #include "../h/user.h" 21 #include "../h/map.h" 22 #include "../h/pte.h" 23 #include "../h/mbareg.h" 24 #include "../h/mbavar.h" 25 #include "../h/mtio.h" 26 #include "../h/ioctl.h" 27 #include "../h/cmap.h" 28 #include "../h/cpu.h" 29 30 #include "../h/htreg.h" 31 32 struct buf rhtbuf[NHT]; 33 struct buf chtbuf[NHT]; 34 35 short httypes[] = 36 { MBDT_TM03, MBDT_TE16, MBDT_TU45, MBDT_TU77, 0 }; 37 struct mba_device *htinfo[NHT]; 38 int htattach(), htslave(), htustart(), htndtint(), htdtint(); 39 struct mba_driver htdriver = 40 { htattach, htslave, htustart, 0, htdtint, htndtint, 41 httypes, "ht", "tu", htinfo }; 42 43 #define MASKREG(r) ((r) & 0xffff) 44 45 /* bits in minor device */ 46 #define TUUNIT(dev) (minor(dev)&03) 47 #define H_NOREWIND 04 48 #define H_1600BPI 08 49 50 #define HTUNIT(dev) (tutoht[TUUNIT(dev)]) 51 52 #define INF (daddr_t)1000000L /* a block number that wont exist */ 53 54 struct tu_softc { 55 char sc_openf; 56 char sc_flags; 57 daddr_t sc_blkno; 58 daddr_t sc_nxrec; 59 u_short sc_erreg; 60 u_short sc_dsreg; 61 short sc_resid; 62 short sc_dens; 63 struct mba_device *sc_mi; 64 int sc_slave; 65 } tu_softc[NTU]; 66 short tutoht[NTU]; 67 68 /* 69 * Bits for sc_flags. 70 */ 71 #define H_WRITTEN 1 /* last operation was a write */ 72 #define H_ERASED 2 /* last write retry was an erase gap */ 73 #define H_REWIND 4 /* last unit start was a rewind */ 74 75 char hter_bits[] = HTER_BITS; 76 char htds_bits[] = HTDS_BITS; 77 78 /*ARGSUSED*/ 79 htattach(mi) 80 struct mba_device *mi; 81 { 82 83 } 84 85 htslave(mi, ms) 86 struct mba_device *mi; 87 struct mba_slave *ms; 88 { 89 register struct tu_softc *sc = &tu_softc[ms->ms_unit]; 90 register struct htdevice *htaddr = (struct htdevice *)mi->mi_drv; 91 92 htaddr->httc = ms->ms_slave; 93 if (htaddr->htdt & HTDT_SPR) { 94 sc->sc_mi = mi; 95 sc->sc_slave = ms->ms_slave; 96 tutoht[ms->ms_unit] = mi->mi_unit; 97 return (1); 98 } else 99 return (0); 100 } 101 102 htopen(dev, flag) 103 dev_t dev; 104 int flag; 105 { 106 register int tuunit; 107 register struct mba_device *mi; 108 register struct tu_softc *sc; 109 int olddens, dens; 110 111 tuunit = TUUNIT(dev); 112 if (tuunit >= NTU || (sc = &tu_softc[tuunit])->sc_openf || 113 (mi = htinfo[HTUNIT(dev)]) == 0 || mi->mi_alive == 0) { 114 u.u_error = ENXIO; 115 return; 116 } 117 olddens = sc->sc_dens; 118 dens = sc->sc_dens = 119 ((minor(dev)&H_1600BPI)?HTTC_1600BPI:HTTC_800BPI)| 120 HTTC_PDP11|sc->sc_slave; 121 htcommand(dev, HT_SENSE, 1); 122 sc->sc_dens = olddens; 123 if ((sc->sc_dsreg & HTDS_MOL) == 0) { 124 uprintf("tu%d: not online\n", tuunit); 125 u.u_error = EIO; 126 return; 127 } 128 if ((flag&FWRITE) && (sc->sc_dsreg&HTDS_WRL)) { 129 uprintf("tu%d: no write ring\n", tuunit); 130 u.u_error = EIO; 131 return; 132 } 133 if ((sc->sc_dsreg & HTDS_BOT) == 0 && (flag&FWRITE) && 134 dens != sc->sc_dens) { 135 uprintf("tu%d: can't change density in mid-tape\n", tuunit); 136 u.u_error = EIO; 137 return; 138 } 139 sc->sc_openf = 1; 140 sc->sc_blkno = (daddr_t)0; 141 sc->sc_nxrec = INF; 142 sc->sc_flags = 0; 143 sc->sc_dens = dens; 144 } 145 146 htclose(dev, flag) 147 register dev_t dev; 148 register flag; 149 { 150 register struct tu_softc *sc = &tu_softc[TUUNIT(dev)]; 151 152 if (flag == FWRITE || ((flag&FWRITE) && (sc->sc_flags&H_WRITTEN))) { 153 htcommand(dev, HT_WEOF, 1); 154 htcommand(dev, HT_WEOF, 1); 155 htcommand(dev, HT_SREV, 1); 156 } 157 if ((minor(dev)&H_NOREWIND) == 0) 158 htcommand(dev, HT_REW, 0); 159 sc->sc_openf = 0; 160 } 161 162 htcommand(dev, com, count) 163 dev_t dev; 164 int com, count; 165 { 166 register struct buf *bp; 167 register int s; 168 169 bp = &chtbuf[HTUNIT(dev)]; 170 s = spl5(); 171 while (bp->b_flags&B_BUSY) { 172 if(bp->b_repcnt == 0 && (bp->b_flags&B_DONE)) 173 break; 174 bp->b_flags |= B_WANTED; 175 sleep((caddr_t)bp, PRIBIO); 176 } 177 bp->b_flags = B_BUSY|B_READ; 178 splx(s); 179 bp->b_dev = dev; 180 bp->b_command = com; 181 bp->b_repcnt = count; 182 bp->b_blkno = 0; 183 htstrategy(bp); 184 if (count == 0) 185 return; 186 iowait(bp); 187 if (bp->b_flags&B_WANTED) 188 wakeup((caddr_t)bp); 189 bp->b_flags &= B_ERROR; 190 } 191 192 htstrategy(bp) 193 register struct buf *bp; 194 { 195 register struct mba_device *mi = htinfo[HTUNIT(bp->b_dev)]; 196 register struct buf *dp; 197 register int s; 198 199 bp->av_forw = NULL; 200 dp = &mi->mi_tab; 201 s = spl5(); 202 if (dp->b_actf == NULL) 203 dp->b_actf = bp; 204 else 205 dp->b_actl->av_forw = bp; 206 dp->b_actl = bp; 207 if (dp->b_active == 0) 208 mbustart(mi); 209 splx(s); 210 } 211 212 htustart(mi) 213 register struct mba_device *mi; 214 { 215 register struct htdevice *htaddr = 216 (struct htdevice *)mi->mi_drv; 217 register struct buf *bp = mi->mi_tab.b_actf; 218 register struct tu_softc *sc = &tu_softc[TUUNIT(bp->b_dev)]; 219 daddr_t blkno; 220 221 htaddr->httc = sc->sc_dens; 222 if (bp == &chtbuf[HTUNIT(bp->b_dev)] && bp->b_command == HT_SENSE) { 223 htaddr->htcs1 = HT_SENSE|HT_GO; 224 mbclrattn(mi); 225 } 226 sc->sc_dsreg = htaddr->htds; 227 sc->sc_erreg = htaddr->hter; 228 sc->sc_resid = htaddr->htfc; 229 sc->sc_flags &= ~(H_WRITTEN|H_REWIND); 230 if ((htaddr->htdt & HTDT_SPR) == 0 || (htaddr->htds & HTDS_MOL) == 0) 231 if (sc->sc_openf > 0) 232 sc->sc_openf = -1; 233 if (sc->sc_openf < 0) { 234 bp->b_flags |= B_ERROR; 235 return (MBU_NEXT); 236 } 237 if (bp != &chtbuf[HTUNIT(bp->b_dev)]) { 238 if (dbtofsb(bp->b_blkno) > sc->sc_nxrec) { 239 bp->b_flags |= B_ERROR; 240 bp->b_error = ENXIO; 241 return (MBU_NEXT); 242 } 243 if (dbtofsb(bp->b_blkno) == sc->sc_nxrec && 244 bp->b_flags&B_READ) { 245 bp->b_resid = bp->b_bcount; 246 clrbuf(bp); 247 return (MBU_NEXT); 248 } 249 if ((bp->b_flags&B_READ)==0) 250 sc->sc_nxrec = dbtofsb(bp->b_blkno) + 1; 251 } else { 252 if (bp->b_command == HT_SENSE) 253 return (MBU_NEXT); 254 if (bp->b_command == HT_REW) 255 sc->sc_flags |= H_REWIND; 256 else 257 htaddr->htfc = -bp->b_bcount; 258 htaddr->htcs1 = bp->b_command|HT_GO; 259 return (MBU_STARTED); 260 } 261 if ((blkno = sc->sc_blkno) == dbtofsb(bp->b_blkno)) { 262 htaddr->htfc = -bp->b_bcount; 263 if ((bp->b_flags&B_READ) == 0) { 264 if (mi->mi_tab.b_errcnt) { 265 if ((sc->sc_flags & H_ERASED) == 0) { 266 sc->sc_flags |= H_ERASED; 267 htaddr->htcs1 = HT_ERASE | HT_GO; 268 return (MBU_STARTED); 269 } 270 sc->sc_flags &= ~H_ERASED; 271 } 272 if (htaddr->htds & HTDS_EOT) { 273 bp->b_resid = bp->b_bcount; 274 return (MBU_NEXT); 275 } 276 } 277 return (MBU_DODATA); 278 } 279 if (blkno < dbtofsb(bp->b_blkno)) { 280 htaddr->htfc = blkno - dbtofsb(bp->b_blkno); 281 htaddr->htcs1 = HT_SFORW|HT_GO; 282 } else { 283 htaddr->htfc = dbtofsb(bp->b_blkno) - blkno; 284 htaddr->htcs1 = HT_SREV|HT_GO; 285 } 286 return (MBU_STARTED); 287 } 288 289 htdtint(mi, mbsr) 290 register struct mba_device *mi; 291 int mbsr; 292 { 293 register struct htdevice *htaddr = (struct htdevice *)mi->mi_drv; 294 register struct buf *bp = mi->mi_tab.b_actf; 295 register struct tu_softc *sc; 296 int ds, er, mbs; 297 298 sc = &tu_softc[TUUNIT(bp->b_dev)]; 299 ds = sc->sc_dsreg = MASKREG(htaddr->htds); 300 er = sc->sc_erreg = MASKREG(htaddr->hter); 301 sc->sc_resid = MASKREG(htaddr->htfc); 302 mbs = mbsr; 303 sc->sc_blkno++; 304 if((bp->b_flags & B_READ) == 0) 305 sc->sc_flags |= H_WRITTEN; 306 if ((ds&(HTDS_ERR|HTDS_MOL)) != HTDS_MOL || mbs & MBSR_EBITS) { 307 htaddr->htcs1 = HT_DCLR|HT_GO; 308 mbclrattn(mi); 309 if (bp == &rhtbuf[HTUNIT(bp->b_dev)]) { 310 er &= ~HTER_FCE; 311 mbs &= ~(MBSR_DTABT|MBSR_MBEXC); 312 } 313 if (bp->b_flags & B_READ && ds & HTDS_PES) 314 er &= ~(HTER_CSITM|HTER_CORCRC); 315 if (er&HTER_HARD || mbs&MBSR_EBITS || (ds&HTDS_MOL) == 0 || 316 er && ++mi->mi_tab.b_errcnt >= 7) { 317 if ((ds & HTDS_MOL) == 0 && sc->sc_openf > 0) 318 sc->sc_openf = -1; 319 if ((er&HTER_HARD) == HTER_FCE && 320 (mbs&MBSR_EBITS) == (MBSR_DTABT|MBSR_MBEXC) && 321 (ds&HTDS_MOL)) 322 goto noprint; 323 printf("tu%d: hard error bn%d mbsr=%b er=%b ds=%b\n", 324 TUUNIT(bp->b_dev), bp->b_blkno, 325 mbsr, mbsr_bits, 326 sc->sc_erreg, hter_bits, 327 sc->sc_dsreg, htds_bits); 328 noprint: 329 bp->b_flags |= B_ERROR; 330 return (MBD_DONE); 331 } 332 if (er) 333 return (MBD_RETRY); 334 } 335 bp->b_resid = 0; 336 if (bp->b_flags & B_READ) 337 if (ds&HTDS_TM) { /* must be a read, right? */ 338 bp->b_resid = bp->b_bcount; 339 sc->sc_nxrec = dbtofsb(bp->b_blkno); 340 } else if(bp->b_bcount > MASKREG(htaddr->htfc)) 341 bp->b_resid = bp->b_bcount - MASKREG(htaddr->htfc); 342 return (MBD_DONE); 343 } 344 345 htndtint(mi) 346 register struct mba_device *mi; 347 { 348 register struct htdevice *htaddr = (struct htdevice *)mi->mi_drv; 349 register struct buf *bp = mi->mi_tab.b_actf; 350 register struct tu_softc *sc; 351 int er, ds, fc; 352 353 ds = MASKREG(htaddr->htds); 354 er = MASKREG(htaddr->hter); 355 fc = MASKREG(htaddr->htfc); 356 if (er) { 357 htaddr->htcs1 = HT_DCLR|HT_GO; 358 mbclrattn(mi); 359 } 360 if (bp == 0) 361 return (MBN_SKIP); 362 sc = &tu_softc[TUUNIT(bp->b_dev)]; 363 sc->sc_dsreg = ds; 364 sc->sc_erreg = er; 365 sc->sc_resid = fc; 366 if (bp == &chtbuf[HTUNIT(bp->b_dev)]) { 367 switch (bp->b_command) { 368 case HT_REWOFFL: 369 /* offline is on purpose; don't do anything special */ 370 ds |= HTDS_MOL; 371 break; 372 case HT_SREV: 373 /* if backspace file hit bot, its not an error */ 374 if (er == (HTER_NEF|HTER_FCE) && ds&HTDS_BOT && 375 bp->b_repcnt == INF) 376 er &= ~HTER_NEF; 377 break; 378 } 379 er &= ~HTER_FCE; 380 if (er == 0) 381 ds &= ~HTDS_ERR; 382 } 383 if ((ds & (HTDS_ERR|HTDS_MOL)) != HTDS_MOL) { 384 if ((ds & HTDS_MOL) == 0 && sc->sc_openf > 0) 385 sc->sc_openf = -1; 386 printf("tu%d: hard error bn%d er=%b ds=%b\n", 387 TUUNIT(bp->b_dev), bp->b_blkno, 388 sc->sc_erreg, hter_bits, sc->sc_dsreg, htds_bits); 389 bp->b_flags |= B_ERROR; 390 return (MBN_DONE); 391 } 392 if (bp == &chtbuf[HTUNIT(bp->b_dev)]) { 393 if (sc->sc_flags & H_REWIND) 394 return (ds & HTDS_BOT ? MBN_DONE : MBN_RETRY); 395 bp->b_resid = -sc->sc_resid; 396 return (MBN_DONE); 397 } 398 if (ds & HTDS_TM) 399 if (sc->sc_blkno > dbtofsb(bp->b_blkno)) { 400 sc->sc_nxrec = dbtofsb(bp->b_blkno) - fc; 401 sc->sc_blkno = sc->sc_nxrec; 402 } else { 403 sc->sc_blkno = dbtofsb(bp->b_blkno) + fc; 404 sc->sc_nxrec = sc->sc_blkno - 1; 405 } 406 else 407 sc->sc_blkno = dbtofsb(bp->b_blkno); 408 return (MBN_RETRY); 409 } 410 411 htread(dev) 412 dev_t dev; 413 { 414 415 htphys(dev); 416 if (u.u_error) 417 return; 418 physio(htstrategy, &rhtbuf[HTUNIT(dev)], dev, B_READ, minphys); 419 } 420 421 htwrite(dev) 422 { 423 424 htphys(dev); 425 if (u.u_error) 426 return; 427 physio(htstrategy, &rhtbuf[HTUNIT(dev)], dev, B_WRITE, minphys); 428 } 429 430 htphys(dev) 431 dev_t dev; 432 { 433 register int htunit; 434 register struct tu_softc *sc; 435 register struct mba_device *mi; 436 daddr_t a; 437 438 htunit = HTUNIT(dev); 439 if (htunit >= NHT || (mi = htinfo[htunit]) == 0 || mi->mi_alive == 0) { 440 u.u_error = ENXIO; 441 return; 442 } 443 a = u.u_offset >> 9; 444 sc = &tu_softc[TUUNIT(dev)]; 445 sc->sc_blkno = dbtofsb(a); 446 sc->sc_nxrec = dbtofsb(a)+1; 447 } 448 449 /*ARGSUSED*/ 450 htioctl(dev, cmd, addr, flag) 451 dev_t dev; 452 int cmd; 453 caddr_t addr; 454 int flag; 455 { 456 register struct tu_softc *sc = &tu_softc[TUUNIT(dev)]; 457 register struct buf *bp = &chtbuf[HTUNIT(dev)]; 458 register callcount; 459 int fcount; 460 struct mtop mtop; 461 struct mtget mtget; 462 /* we depend of the values and order of the MT codes here */ 463 static htops[] = 464 {HT_WEOF,HT_SFORW,HT_SREV,HT_SFORW,HT_SREV,HT_REW,HT_REWOFFL,HT_SENSE}; 465 466 switch (cmd) { 467 case MTIOCTOP: /* tape operation */ 468 if (copyin((caddr_t)addr, (caddr_t)&mtop, sizeof(mtop))) { 469 u.u_error = EFAULT; 470 return; 471 } 472 switch(mtop.mt_op) { 473 case MTWEOF: 474 callcount = mtop.mt_count; 475 fcount = 1; 476 break; 477 case MTFSF: case MTBSF: 478 callcount = mtop.mt_count; 479 fcount = INF; 480 break; 481 case MTFSR: case MTBSR: 482 callcount = 1; 483 fcount = mtop.mt_count; 484 break; 485 case MTREW: case MTOFFL: 486 callcount = 1; 487 fcount = 1; 488 break; 489 default: 490 u.u_error = ENXIO; 491 return; 492 } 493 if (callcount <= 0 || fcount <= 0) { 494 u.u_error = ENXIO; 495 return; 496 } 497 while (--callcount >= 0) { 498 htcommand(dev, htops[mtop.mt_op], fcount); 499 if ((mtop.mt_op == MTFSR || mtop.mt_op == MTBSR) && 500 bp->b_resid) { 501 u.u_error = EIO; 502 break; 503 } 504 if ((bp->b_flags&B_ERROR) || sc->sc_dsreg&HTDS_BOT) 505 break; 506 } 507 geterror(bp); 508 return; 509 case MTIOCGET: 510 mtget.mt_dsreg = sc->sc_dsreg; 511 mtget.mt_erreg = sc->sc_erreg; 512 mtget.mt_resid = sc->sc_resid; 513 mtget.mt_type = MT_ISHT; 514 if (copyout((caddr_t)&mtget, addr, sizeof(mtget))) 515 u.u_error = EFAULT; 516 return; 517 default: 518 u.u_error = ENXIO; 519 } 520 } 521 522 #define DBSIZE 20 523 524 htdump() 525 { 526 register struct mba_device *mi; 527 register struct mba_regs *mp; 528 register struct htdevice *htaddr; 529 int blk, num; 530 int start; 531 532 start = 0; 533 num = maxfree; 534 #define phys(a,b) ((b)((int)(a)&0x7fffffff)) 535 if (htinfo[0] == 0) 536 return (ENXIO); 537 mi = phys(htinfo[0], struct mba_device *); 538 mp = phys(mi->mi_hd, struct mba_hd *)->mh_physmba; 539 mp->mba_cr = MBCR_IE; 540 htaddr = (struct htdevice *)&mp->mba_drv[mi->mi_drive]; 541 htaddr->httc = HTTC_PDP11|HTTC_1600BPI; 542 htaddr->htcs1 = HT_DCLR|HT_GO; 543 while (num > 0) { 544 blk = num > DBSIZE ? DBSIZE : num; 545 htdwrite(start, blk, htaddr, mp); 546 start += blk; 547 num -= blk; 548 } 549 hteof(htaddr); 550 hteof(htaddr); 551 htwait(htaddr); 552 if (htaddr->htds&HTDS_ERR) 553 return (EIO); 554 htaddr->htcs1 = HT_REW|HT_GO; 555 return (0); 556 } 557 558 htdwrite(dbuf, num, htaddr, mp) 559 register dbuf, num; 560 register struct htdevice *htaddr; 561 struct mba_regs *mp; 562 { 563 register struct pte *io; 564 register int i; 565 566 htwait(htaddr); 567 io = mp->mba_map; 568 for (i = 0; i < num; i++) 569 *(int *)io++ = dbuf++ | PG_V; 570 htaddr->htfc = -(num*NBPG); 571 mp->mba_sr = -1; 572 mp->mba_bcr = -(num*NBPG); 573 mp->mba_var = 0; 574 htaddr->htcs1 = HT_WCOM|HT_GO; 575 } 576 577 htwait(htaddr) 578 struct htdevice *htaddr; 579 { 580 register s; 581 582 do 583 s = htaddr->htds; 584 while ((s & HTDS_DRY) == 0); 585 } 586 587 hteof(htaddr) 588 struct htdevice *htaddr; 589 { 590 591 htwait(htaddr); 592 htaddr->htcs1 = HT_WEOF|HT_GO; 593 } 594 #endif 595