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1.1 ! root 1: /* mt.c 6.1 83/07/29 */ ! 2: ! 3: #include "mu.h" ! 4: #if NMT > 0 ! 5: /* ! 6: * TM78/TU78 tape driver ! 7: * ! 8: * Behavior in complex error situations is uncertain... ! 9: * ! 10: * TODO: ! 11: * test error recovery ! 12: * add odd byte count kludge from VMS driver ! 13: * write dump routine ! 14: */ ! 15: #include "../machine/pte.h" ! 16: ! 17: #include "../h/param.h" ! 18: #include "../h/systm.h" ! 19: #include "../h/buf.h" ! 20: #include "../h/conf.h" ! 21: #include "../h/dir.h" ! 22: #include "../h/file.h" ! 23: #include "../h/user.h" ! 24: #include "../h/map.h" ! 25: #include "../h/ioctl.h" ! 26: #include "../h/mtio.h" ! 27: #include "../h/cmap.h" ! 28: #include "../h/uio.h" ! 29: ! 30: #include "../vax/cpu.h" ! 31: #include "../vaxmba/mbareg.h" ! 32: #include "../vaxmba/mbavar.h" ! 33: #include "../vaxmba/mtreg.h" ! 34: ! 35: struct buf rmtbuf[NMT]; ! 36: struct buf cmtbuf[NMT]; ! 37: ! 38: short mttypes[] = ! 39: { MBDT_TU78, 0 }; ! 40: struct mba_device *mtinfo[NMT]; ! 41: int mtattach(), mtslave(), mtustart(), mtstart(), mtndtint(), mtdtint(); ! 42: struct mba_driver mtdriver = ! 43: { mtattach, mtslave, mtustart, mtstart, mtdtint, mtndtint, ! 44: mttypes, "mt", "mu", mtinfo }; ! 45: ! 46: #define MASKREG(r) ((r) & 0xffff) ! 47: ! 48: /* bits in minor device */ ! 49: #define MUUNIT(dev) (minor(dev)&03) ! 50: #define H_NOREWIND 04 ! 51: #define H_6250BPI 08 ! 52: ! 53: #define MTUNIT(dev) (mutomt[MUUNIT(dev)]) ! 54: ! 55: #define INF (daddr_t)1000000L /* a block number that wont exist */ ! 56: ! 57: struct mu_softc { ! 58: char sc_openf; ! 59: char sc_flags; ! 60: daddr_t sc_blkno; ! 61: daddr_t sc_nxrec; ! 62: u_short sc_erreg; ! 63: u_short sc_dsreg; ! 64: short sc_resid; ! 65: short sc_dens; ! 66: struct mba_device *sc_mi; ! 67: int sc_slave; ! 68: } mu_softc[NMU]; ! 69: short mutomt[NMU]; ! 70: ! 71: /* ! 72: * Bits for sc_flags. ! 73: */ ! 74: #define H_WRITTEN 1 /* last operation was a write */ ! 75: ! 76: char mtds_bits[] = MTDS_BITS; ! 77: ! 78: /*ARGSUSED*/ ! 79: mtattach(mi) ! 80: struct mba_device *mi; ! 81: { ! 82: ! 83: } ! 84: ! 85: mtslave(mi, ms, sn) ! 86: struct mba_device *mi; ! 87: struct mba_slave *ms; ! 88: int sn; ! 89: { ! 90: register struct mu_softc *sc = &mu_softc[ms->ms_unit]; ! 91: register struct mtdevice *mtaddr = (struct mtdevice *)mi->mi_drv; ! 92: int s = spl7(), rtn = 0; ! 93: ! 94: mtaddr->mtas = -1; ! 95: mtaddr->mtncs[sn] = MT_SENSE|MT_GO; ! 96: while (mtaddr->mtas == 0) ! 97: ; ! 98: if ((mtaddr->mtner & MTER_INTCODE) == MTER_DONE && ! 99: (mtaddr->mtds & MTDS_PRES)) { ! 100: sc->sc_mi = mi; ! 101: sc->sc_slave = sn; ! 102: mutomt[ms->ms_unit] = mi->mi_unit; ! 103: rtn = 1; ! 104: } ! 105: mtaddr->mtas = mtaddr->mtas; ! 106: splx(s); ! 107: return (rtn); ! 108: } ! 109: ! 110: mtopen(dev, flag) ! 111: dev_t dev; ! 112: int flag; ! 113: { ! 114: register int muunit; ! 115: register struct mba_device *mi; ! 116: register struct mu_softc *sc; ! 117: int olddens, dens; ! 118: ! 119: muunit = MUUNIT(dev); ! 120: if (muunit >= NMU || (sc = &mu_softc[muunit])->sc_openf || ! 121: (mi = mtinfo[MTUNIT(dev)]) == 0 || mi->mi_alive == 0) ! 122: return (ENXIO); ! 123: olddens = sc->sc_dens; ! 124: dens = sc->sc_dens = (minor(dev)&H_6250BPI) ? MT_GCR : 0; ! 125: mtcommand(dev, MT_SENSE, 1); ! 126: sc->sc_dens = olddens; ! 127: if ((sc->sc_dsreg & MTDS_ONL) == 0) { ! 128: uprintf("mu%d: not online\n", muunit); ! 129: return (EIO); ! 130: } ! 131: if ((flag&FWRITE) && (sc->sc_dsreg&MTDS_FPT)) { ! 132: uprintf("mu%d: no write ring\n", muunit); ! 133: return (EIO); ! 134: } ! 135: if ((sc->sc_dsreg & MTDS_BOT) == 0 && (flag&FWRITE) && ! 136: dens != sc->sc_dens) { ! 137: uprintf("mu%d: can't change density in mid-tape\n", muunit); ! 138: return (EIO); ! 139: } ! 140: sc->sc_openf = 1; ! 141: sc->sc_blkno = (daddr_t)0; ! 142: sc->sc_nxrec = INF; ! 143: sc->sc_flags = 0; ! 144: sc->sc_dens = dens; ! 145: return (0); ! 146: } ! 147: ! 148: mtclose(dev, flag) ! 149: register dev_t dev; ! 150: register flag; ! 151: { ! 152: register struct mu_softc *sc = &mu_softc[MUUNIT(dev)]; ! 153: ! 154: if (flag == FWRITE || ((flag&FWRITE) && (sc->sc_flags&H_WRITTEN))) ! 155: mtcommand(dev, MT_CLS|sc->sc_dens, 1); ! 156: if ((minor(dev)&H_NOREWIND) == 0) ! 157: mtcommand(dev, MT_REW, 0); ! 158: sc->sc_openf = 0; ! 159: } ! 160: ! 161: mtcommand(dev, com, count) ! 162: dev_t dev; ! 163: int com, count; ! 164: { ! 165: register struct buf *bp; ! 166: register int s; ! 167: ! 168: bp = &cmtbuf[MTUNIT(dev)]; ! 169: s = spl5(); ! 170: while (bp->b_flags&B_BUSY) { ! 171: if(bp->b_repcnt == 0 && (bp->b_flags&B_DONE)) ! 172: break; ! 173: bp->b_flags |= B_WANTED; ! 174: sleep((caddr_t)bp, PRIBIO); ! 175: } ! 176: bp->b_flags = B_BUSY|B_READ; ! 177: splx(s); ! 178: bp->b_dev = dev; ! 179: bp->b_command = com; ! 180: bp->b_repcnt = count; ! 181: bp->b_blkno = 0; ! 182: mtstrategy(bp); ! 183: if (count == 0) ! 184: return; ! 185: iowait(bp); ! 186: if (bp->b_flags&B_WANTED) ! 187: wakeup((caddr_t)bp); ! 188: bp->b_flags &= B_ERROR; ! 189: } ! 190: ! 191: mtstrategy(bp) ! 192: register struct buf *bp; ! 193: { ! 194: register struct mba_device *mi = mtinfo[MTUNIT(bp->b_dev)]; ! 195: register struct buf *dp; ! 196: register int s; ! 197: ! 198: bp->av_forw = NULL; ! 199: dp = &mi->mi_tab; ! 200: s = spl5(); ! 201: if (dp->b_actf == NULL) ! 202: dp->b_actf = bp; ! 203: else ! 204: dp->b_actl->av_forw = bp; ! 205: dp->b_actl = bp; ! 206: if (dp->b_active == 0) ! 207: mbustart(mi); ! 208: splx(s); ! 209: } ! 210: ! 211: mtustart(mi) ! 212: register struct mba_device *mi; ! 213: { ! 214: register struct mtdevice *mtaddr = ! 215: (struct mtdevice *)mi->mi_drv; ! 216: register struct buf *bp = mi->mi_tab.b_actf; ! 217: register struct mu_softc *sc = &mu_softc[MUUNIT(bp->b_dev)]; ! 218: daddr_t blkno; ! 219: ! 220: sc->sc_flags &= ~H_WRITTEN; ! 221: if (sc->sc_openf < 0) { ! 222: bp->b_flags |= B_ERROR; ! 223: return (MBU_NEXT); ! 224: } ! 225: if (bp != &cmtbuf[MTUNIT(bp->b_dev)]) { ! 226: if (bdbtofsb(bp->b_blkno) > sc->sc_nxrec) { ! 227: bp->b_flags |= B_ERROR; ! 228: bp->b_error = ENXIO; ! 229: return (MBU_NEXT); ! 230: } ! 231: if (bdbtofsb(bp->b_blkno) == sc->sc_nxrec && ! 232: bp->b_flags&B_READ) { ! 233: bp->b_resid = bp->b_bcount; ! 234: clrbuf(bp); ! 235: return (MBU_NEXT); ! 236: } ! 237: if ((bp->b_flags&B_READ)==0) ! 238: sc->sc_nxrec = bdbtofsb(bp->b_blkno) + 1; ! 239: } else { ! 240: mtaddr->mtncs[MUUNIT(bp->b_dev)] = ! 241: (bp->b_repcnt<<8)|bp->b_command|MT_GO; ! 242: return (MBU_STARTED); ! 243: } ! 244: if ((blkno = sc->sc_blkno) == bdbtofsb(bp->b_blkno)) { ! 245: if (mi->mi_tab.b_errcnt == 2) { ! 246: mtaddr->mtca = MUUNIT(bp->b_dev); ! 247: } else { ! 248: mtaddr->mtbc = bp->b_bcount; ! 249: mtaddr->mtca = (1<<2)|MUUNIT(bp->b_dev); ! 250: } ! 251: return (MBU_DODATA); ! 252: } ! 253: if (blkno < bdbtofsb(bp->b_blkno)) ! 254: mtaddr->mtncs[MUUNIT(bp->b_dev)] = ! 255: (min((unsigned)(bdbtofsb(bp->b_blkno) - blkno), 0377) << 8) | ! 256: MT_SFORW|MT_GO; ! 257: else ! 258: mtaddr->mtncs[MUUNIT(bp->b_dev)] = ! 259: (min((unsigned)(blkno - bdbtofsb(bp->b_blkno)), 0377) << 8) | ! 260: MT_SREV|MT_GO; ! 261: return (MBU_STARTED); ! 262: } ! 263: ! 264: mtstart(mi) ! 265: register struct mba_device *mi; ! 266: { ! 267: register struct buf *bp = mi->mi_tab.b_actf; ! 268: register struct mu_softc *sc = &mu_softc[MUUNIT(bp->b_dev)]; ! 269: ! 270: if (bp->b_flags & B_READ) ! 271: if (mi->mi_tab.b_errcnt == 2) ! 272: return(MT_READREV|MT_GO); ! 273: else ! 274: return(MT_READ|MT_GO); ! 275: else ! 276: return(MT_WRITE|sc->sc_dens|MT_GO); ! 277: } ! 278: ! 279: mtdtint(mi, mbsr) ! 280: register struct mba_device *mi; ! 281: int mbsr; ! 282: { ! 283: register struct mtdevice *mtaddr = (struct mtdevice *)mi->mi_drv; ! 284: register struct buf *bp = mi->mi_tab.b_actf; ! 285: register struct mu_softc *sc; ! 286: ! 287: /* I'M NOT SURE IF THIS SHOULD ALWAYS BE THE CASE SO FOR NOW... */ ! 288: if ((mtaddr->mtca&3) != MUUNIT(bp->b_dev)) { ! 289: printf("mt: wrong unit!\n"); ! 290: mtaddr->mtca = MUUNIT(bp->b_dev); ! 291: } ! 292: sc = &mu_softc[MUUNIT(bp->b_dev)]; ! 293: sc->sc_erreg = mtaddr->mter; ! 294: if((bp->b_flags & B_READ) == 0) ! 295: sc->sc_flags |= H_WRITTEN; ! 296: switch (sc->sc_erreg & MTER_INTCODE) { ! 297: case MTER_DONE: ! 298: case MTER_LONGREC: ! 299: if (mi->mi_tab.b_errcnt != 2) ! 300: sc->sc_blkno++; ! 301: bp->b_resid = 0; ! 302: break; ! 303: ! 304: case MTER_NOTCAP: ! 305: printf("mu%d: blank tape\n", MUUNIT(bp->b_dev)); ! 306: goto err; ! 307: ! 308: case MTER_TM: ! 309: case MTER_EOT: ! 310: sc->sc_blkno++; ! 311: err: ! 312: bp->b_resid = bp->b_bcount; ! 313: sc->sc_nxrec = bdbtofsb(bp->b_blkno); ! 314: break; ! 315: ! 316: case MTER_SHRTREC: ! 317: sc->sc_blkno++; ! 318: if (bp != &rmtbuf[MTUNIT(bp->b_dev)]) ! 319: bp->b_flags |= B_ERROR; ! 320: if (mi->mi_tab.b_errcnt == 2) ! 321: bp->b_bcount = bp->b_resid; /* restore saved value */ ! 322: bp->b_resid = bp->b_bcount - mtaddr->mtbc; ! 323: break; ! 324: ! 325: case MTER_RDOPP: ! 326: mi->mi_tab.b_errcnt = 2; /* indicate "read opposite" */ ! 327: bp->b_resid = bp->b_bcount; /* save it */ ! 328: bp->b_bcount = mtaddr->mtbc; /* use this instead */ ! 329: return(MBD_RETRY); ! 330: ! 331: case MTER_RETRY: ! 332: mi->mi_tab.b_errcnt = 1; /* indicate simple retry */ ! 333: return(MBD_RETRY); ! 334: ! 335: case MTER_OFFLINE: ! 336: if (sc->sc_openf > 0) { ! 337: sc->sc_openf = -1; ! 338: printf("mu%d: offline\n", MUUNIT(bp->b_dev)); ! 339: } ! 340: bp->b_flags |= B_ERROR; ! 341: break; ! 342: ! 343: case MTER_FPT: ! 344: printf("mu%d: no write ring\n", MUUNIT(bp->b_dev)); ! 345: bp->b_flags |= B_ERROR; ! 346: break; ! 347: ! 348: default: ! 349: printf("mu%d: hard error bn%d mbsr=%b er=%x ds=%b\n", ! 350: MUUNIT(bp->b_dev), bp->b_blkno, ! 351: mbsr, mbsr_bits, sc->sc_erreg, ! 352: sc->sc_dsreg, mtds_bits); ! 353: bp->b_flags |= B_ERROR; ! 354: mtaddr->mtid = MTID_CLR; /* reset the TM78 */ ! 355: DELAY(250); ! 356: while ((mtaddr->mtid & MTID_RDY) == 0) /* wait for it */ ! 357: ; ! 358: return (MBD_DONE); ! 359: } ! 360: /* CHECK FOR MBA ERROR WHEN NO OTHER ERROR INDICATED? */ ! 361: return (MBD_DONE); ! 362: } ! 363: ! 364: mtndtint(mi) ! 365: register struct mba_device *mi; ! 366: { ! 367: register struct mtdevice *mtaddr = (struct mtdevice *)mi->mi_drv; ! 368: register struct buf *bp = mi->mi_tab.b_actf; ! 369: register struct mu_softc *sc; ! 370: int er, fc, unit; ! 371: ! 372: unit = (mtaddr->mtner >> 8) & 3; ! 373: er = MASKREG(mtaddr->mtner); ! 374: /* WILL THIS OCCUR IF ANOTHER DRIVE COMES ONLINE? */ ! 375: if (bp == 0 || unit != MUUNIT(bp->b_dev)) { /* consistency check */ ! 376: if ((er & MTER_INTCODE) != MTER_ONLINE) ! 377: printf("mt: unit %d random interrupt\n", unit); ! 378: return (MBN_SKIP); ! 379: } ! 380: if (bp == 0) ! 381: return (MBN_SKIP); ! 382: fc = (mtaddr->mtncs[unit] >> 8) & 0xff; ! 383: sc = &mu_softc[unit]; ! 384: sc->sc_erreg = er; ! 385: sc->sc_resid = fc; ! 386: switch (er & MTER_INTCODE) { ! 387: case MTER_DONE: ! 388: if (bp == &cmtbuf[MTUNIT(bp->b_dev)]) { ! 389: done: ! 390: if (bp->b_command == MT_SENSE) ! 391: sc->sc_dsreg = MASKREG(mtaddr->mtds); ! 392: bp->b_resid = fc; ! 393: return (MBN_DONE); ! 394: } ! 395: /* this is UGLY! (but is it correct?) */ ! 396: if ((fc = bdbtofsb(bp->b_blkno) - sc->sc_blkno) < 0) ! 397: sc->sc_blkno -= MIN(0377, -fc); ! 398: else ! 399: sc->sc_blkno += MIN(0377, fc); ! 400: return (MBN_RETRY); ! 401: ! 402: case MTER_RWDING: ! 403: return (MBN_SKIP); /* ignore "rewind started" interrupt */ ! 404: ! 405: case MTER_NOTCAP: ! 406: printf("mu%d: blank tape\n", MUUNIT(bp->b_dev)); ! 407: ! 408: case MTER_TM: ! 409: case MTER_EOT: ! 410: case MTER_LEOT: ! 411: if (sc->sc_blkno > bdbtofsb(bp->b_blkno)) { ! 412: sc->sc_nxrec = bdbtofsb(bp->b_blkno) + fc; ! 413: sc->sc_blkno = sc->sc_nxrec; ! 414: } else { ! 415: sc->sc_blkno = bdbtofsb(bp->b_blkno) - fc; ! 416: sc->sc_nxrec = sc->sc_blkno - 1; ! 417: } ! 418: return (MBN_RETRY); ! 419: ! 420: case MTER_FPT: ! 421: printf("mu%d: no write ring\n", MUUNIT(bp->b_dev)); ! 422: bp->b_flags |= B_ERROR; ! 423: return (MBN_DONE); ! 424: ! 425: case MTER_OFFLINE: ! 426: if (sc->sc_openf > 0) { ! 427: sc->sc_openf = -1; ! 428: printf("mu%d: offline\n", MUUNIT(bp->b_dev)); ! 429: } ! 430: bp->b_flags |= B_ERROR; ! 431: return (MBN_DONE); ! 432: ! 433: case MTER_BOT: ! 434: if (bp == &cmtbuf[MTUNIT(bp->b_dev)]) ! 435: goto done; ! 436: /* FALL THROUGH */ ! 437: ! 438: default: ! 439: printf("mu%d: hard error bn%d er=%o ds=%b\n", ! 440: MUUNIT(bp->b_dev), bp->b_blkno, ! 441: sc->sc_erreg, sc->sc_dsreg, mtds_bits); ! 442: mtaddr->mtid = MTID_CLR; /* reset the TM78 */ ! 443: DELAY(250); ! 444: while ((mtaddr->mtid & MTID_RDY) == 0) /* wait for it */ ! 445: ; ! 446: bp->b_flags |= B_ERROR; ! 447: return (MBN_DONE); ! 448: } ! 449: /* NOTREACHED */ ! 450: } ! 451: ! 452: mtread(dev, uio) ! 453: dev_t dev; ! 454: struct uio *uio; ! 455: { ! 456: int errno; ! 457: ! 458: errno = mtphys(dev, uio); ! 459: if (errno) ! 460: return (errno); ! 461: return (physio(mtstrategy, &rmtbuf[MTUNIT(dev)], dev, B_READ, minphys, uio)); ! 462: } ! 463: ! 464: mtwrite(dev, uio) ! 465: dev_t dev; ! 466: struct uio *uio; ! 467: { ! 468: int errno; ! 469: ! 470: errno = mtphys(dev, uio); ! 471: if (errno) ! 472: return (errno); ! 473: return (physio(mtstrategy, &rmtbuf[MTUNIT(dev)], dev, B_WRITE, minphys, uio)); ! 474: } ! 475: ! 476: mtphys(dev, uio) ! 477: dev_t dev; ! 478: struct uio *uio; ! 479: { ! 480: register int mtunit; ! 481: register struct mu_softc *sc; ! 482: register struct mba_device *mi; ! 483: daddr_t a; ! 484: ! 485: mtunit = MTUNIT(dev); ! 486: if (mtunit >= NMT || (mi = mtinfo[mtunit]) == 0 || mi->mi_alive == 0) ! 487: return (ENXIO); ! 488: a = uio->uio_offset >> 9; ! 489: sc = &mu_softc[MUUNIT(dev)]; ! 490: sc->sc_blkno = bdbtofsb(a); ! 491: sc->sc_nxrec = bdbtofsb(a)+1; ! 492: return (0); ! 493: } ! 494: ! 495: /*ARGSUSED*/ ! 496: mtioctl(dev, cmd, data, flag) ! 497: dev_t dev; ! 498: int cmd; ! 499: caddr_t data; ! 500: int flag; ! 501: { ! 502: register struct mu_softc *sc = &mu_softc[MUUNIT(dev)]; ! 503: register struct buf *bp = &cmtbuf[MTUNIT(dev)]; ! 504: register callcount; ! 505: register int op; ! 506: int fcount; ! 507: struct mtop *mtop; ! 508: struct mtget *mtget; ! 509: /* we depend of the values and order of the MT codes here */ ! 510: static mtops[] = ! 511: {MT_WTM,MT_SFORWF,MT_SREVF,MT_SFORW,MT_SREV,MT_REW,MT_UNLOAD,MT_SENSE}; ! 512: ! 513: switch (cmd) { ! 514: ! 515: case MTIOCTOP: /* tape operation */ ! 516: mtop = (struct mtop *)data; ! 517: switch (mtop->mt_op) { ! 518: ! 519: case MTWEOF: ! 520: callcount = mtop->mt_count; ! 521: fcount = 1; ! 522: break; ! 523: ! 524: case MTFSF: case MTBSF: ! 525: callcount = mtop->mt_count; ! 526: fcount = 1; ! 527: break; ! 528: ! 529: case MTFSR: case MTBSR: ! 530: callcount = 1; ! 531: fcount = mtop->mt_count; ! 532: break; ! 533: ! 534: case MTREW: case MTOFFL: ! 535: callcount = 1; ! 536: fcount = 1; ! 537: break; ! 538: ! 539: default: ! 540: return (ENXIO); ! 541: } ! 542: if (callcount <= 0 || fcount <= 0) ! 543: return (EINVAL); ! 544: op = mtops[mtop->mt_op]; ! 545: if (op == MT_WTM) ! 546: op |= sc->sc_dens; ! 547: while (--callcount >= 0) { ! 548: register int n; ! 549: ! 550: do { ! 551: n = MIN(fcount, 0xff); ! 552: mtcommand(dev, op, n); ! 553: fcount -= n; ! 554: } while (fcount); ! 555: if ((mtop->mt_op == MTFSR || mtop->mt_op == MTBSR) && ! 556: bp->b_resid) ! 557: return (EIO); ! 558: if (bp->b_flags&B_ERROR) ! 559: break; ! 560: } ! 561: return (geterror(bp)); ! 562: ! 563: case MTIOCGET: ! 564: mtget = (struct mtget *)data; ! 565: mtget->mt_erreg = sc->sc_erreg; ! 566: mtget->mt_resid = sc->sc_resid; ! 567: mtcommand(dev, MT_SENSE, 1); /* update drive status */ ! 568: mtget->mt_dsreg = sc->sc_dsreg; ! 569: mtget->mt_type = MT_ISMT; ! 570: break; ! 571: ! 572: default: ! 573: return (ENXIO); ! 574: } ! 575: return (0); ! 576: } ! 577: ! 578: #define DBSIZE 20 ! 579: ! 580: mtdump() ! 581: { ! 582: register struct mba_device *mi; ! 583: register struct mba_regs *mp; ! 584: int blk, num; ! 585: int start; ! 586: ! 587: start = 0; ! 588: num = maxfree; ! 589: #define phys(a,b) ((b)((int)(a)&0x7fffffff)) ! 590: if (mtinfo[0] == 0) ! 591: return (ENXIO); ! 592: mi = phys(mtinfo[0], struct mba_device *); ! 593: mp = phys(mi->mi_hd, struct mba_hd *)->mh_physmba; ! 594: mp->mba_cr = MBCR_IE; ! 595: #if lint ! 596: blk = 0; num = blk; start = num; blk = start; ! 597: return (0); ! 598: #endif ! 599: #ifdef notyet ! 600: mtaddr = (struct mtdevice *)&mp->mba_drv[mi->mi_drive]; ! 601: mtaddr->mttc = MTTC_PDP11|MTTC_1600BPI; ! 602: mtaddr->mtcs1 = MT_DCLR|MT_GO; ! 603: while (num > 0) { ! 604: blk = num > DBSIZE ? DBSIZE : num; ! 605: mtdwrite(start, blk, mtaddr, mp); ! 606: start += blk; ! 607: num -= blk; ! 608: } ! 609: mteof(mtaddr); ! 610: mteof(mtaddr); ! 611: mtwait(mtaddr); ! 612: if (mtaddr->mtds&MTDS_ERR) ! 613: return (EIO); ! 614: mtaddr->mtcs1 = MT_REW|MT_GO; ! 615: return (0); ! 616: } ! 617: ! 618: mtdwrite(dbuf, num, mtaddr, mp) ! 619: register dbuf, num; ! 620: register struct mtdevice *mtaddr; ! 621: struct mba_regs *mp; ! 622: { ! 623: register struct pte *io; ! 624: register int i; ! 625: ! 626: mtwait(mtaddr); ! 627: io = mp->mba_map; ! 628: for (i = 0; i < num; i++) ! 629: *(int *)io++ = dbuf++ | PG_V; ! 630: mtaddr->mtfc = -(num*NBPG); ! 631: mp->mba_sr = -1; ! 632: mp->mba_bcr = -(num*NBPG); ! 633: mp->mba_var = 0; ! 634: mtaddr->mtcs1 = MT_WCOM|MT_GO; ! 635: } ! 636: ! 637: mtwait(mtaddr) ! 638: struct mtdevice *mtaddr; ! 639: { ! 640: register s; ! 641: ! 642: do ! 643: s = mtaddr->mtds; ! 644: while ((s & MTDS_DRY) == 0); ! 645: } ! 646: ! 647: mteof(mtaddr) ! 648: struct mtdevice *mtaddr; ! 649: { ! 650: ! 651: mtwait(mtaddr); ! 652: mtaddr->mtcs1 = MT_WEOF|MT_GO; ! 653: #endif notyet ! 654: } ! 655: #endif
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