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1.1 ! root 1: /* mt.c 1.2 81/10/27 */ ! 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 "../h/param.h" ! 16: #include "../h/systm.h" ! 17: #include "../h/buf.h" ! 18: #include "../h/conf.h" ! 19: #include "../h/dir.h" ! 20: #include "../h/file.h" ! 21: #include "../h/user.h" ! 22: #include "../h/map.h" ! 23: #include "../h/pte.h" ! 24: #include "../h/mbareg.h" ! 25: #include "../h/mbavar.h" ! 26: #include "../h/mtio.h" ! 27: #include "../h/ioctl.h" ! 28: #include "../h/cmap.h" ! 29: #include "../h/cpu.h" ! 30: ! 31: #include "../h/mtreg.h" ! 32: ! 33: struct buf rmtbuf[NMT]; ! 34: struct buf cmtbuf[NMT]; ! 35: ! 36: short mttypes[] = ! 37: { MBDT_TU78, 0 }; ! 38: struct mba_device *mtinfo[NMT]; ! 39: int mtattach(), mtslave(), mtustart(), mtstart(), mtndtint(), mtdtint(); ! 40: struct mba_driver mtdriver = ! 41: { mtattach, mtslave, mtustart, mtstart, mtdtint, mtndtint, ! 42: mttypes, "mt", "mu", mtinfo }; ! 43: ! 44: #define MASKREG(r) ((r) & 0xffff) ! 45: ! 46: /* bits in minor device */ ! 47: #define MUUNIT(dev) (minor(dev)&03) ! 48: #define H_NOREWIND 04 ! 49: #define H_6250BPI 08 ! 50: ! 51: #define MTUNIT(dev) (mutomt[MUUNIT(dev)]) ! 52: ! 53: #define INF (daddr_t)1000000L /* a block number that wont exist */ ! 54: ! 55: struct mu_softc { ! 56: char sc_openf; ! 57: char sc_flags; ! 58: daddr_t sc_blkno; ! 59: daddr_t sc_nxrec; ! 60: u_short sc_erreg; ! 61: u_short sc_dsreg; ! 62: short sc_resid; ! 63: short sc_dens; ! 64: struct mba_device *sc_mi; ! 65: int sc_slave; ! 66: } mu_softc[NMU]; ! 67: short mutomt[NMU]; ! 68: ! 69: /* ! 70: * Bits for sc_flags. ! 71: */ ! 72: #define H_WRITTEN 1 /* last operation was a write */ ! 73: ! 74: char mtds_bits[] = MTDS_BITS; ! 75: ! 76: /*ARGSUSED*/ ! 77: mtattach(mi) ! 78: struct mba_device *mi; ! 79: { ! 80: ! 81: } ! 82: ! 83: mtslave(mi, ms) ! 84: struct mba_device *mi; ! 85: struct mba_slave *ms; ! 86: { ! 87: register struct mu_softc *sc = &mu_softc[ms->ms_unit]; ! 88: register struct mtdevice *mtaddr = (struct mtdevice *)mi->mi_drv; ! 89: int s = spl7(), rtn = 0; ! 90: ! 91: mtaddr->mtas = -1; ! 92: mtaddr->mtncs[ms->ms_slave] = MT_SENSE|MT_GO; ! 93: while (mtaddr->mtas == 0) ! 94: ; ! 95: if ((mtaddr->mtner & MTER_INTCODE) == MTER_DONE && ! 96: (mtaddr->mtds & MTDS_PRES)) { ! 97: sc->sc_mi = mi; ! 98: sc->sc_slave = ms->ms_slave; ! 99: mutomt[ms->ms_unit] = mi->mi_unit; ! 100: rtn = 1; ! 101: } ! 102: mtaddr->mtas = mtaddr->mtas; ! 103: splx(s); ! 104: return (rtn); ! 105: } ! 106: ! 107: mtopen(dev, flag) ! 108: dev_t dev; ! 109: int flag; ! 110: { ! 111: register int muunit; ! 112: register struct mba_device *mi; ! 113: register struct mu_softc *sc; ! 114: int olddens, dens; ! 115: ! 116: muunit = MUUNIT(dev); ! 117: if (muunit >= NMU || (sc = &mu_softc[muunit])->sc_openf || ! 118: (mi = mtinfo[MTUNIT(dev)]) == 0 || mi->mi_alive == 0) { ! 119: u.u_error = ENXIO; ! 120: return; ! 121: } ! 122: olddens = sc->sc_dens; ! 123: dens = sc->sc_dens = (minor(dev)&H_6250BPI) ? MT_GCR : 0; ! 124: mtcommand(dev, MT_SENSE, 1); ! 125: sc->sc_dens = olddens; ! 126: if ((sc->sc_dsreg & MTDS_ONL) == 0) { ! 127: uprintf("mu%d: not online\n", muunit); ! 128: u.u_error = EIO; ! 129: return; ! 130: } ! 131: if ((flag&FWRITE) && (sc->sc_dsreg&MTDS_FPT)) { ! 132: uprintf("mu%d: no write ring\n", muunit); ! 133: u.u_error = EIO; ! 134: return; ! 135: } ! 136: if ((sc->sc_dsreg & MTDS_BOT) == 0 && (flag&FWRITE) && ! 137: dens != sc->sc_dens) { ! 138: uprintf("mu%d: can't change density in mid-tape\n", muunit); ! 139: u.u_error = EIO; ! 140: return; ! 141: } ! 142: sc->sc_openf = 1; ! 143: sc->sc_blkno = (daddr_t)0; ! 144: sc->sc_nxrec = INF; ! 145: sc->sc_flags = 0; ! 146: sc->sc_dens = dens; ! 147: } ! 148: ! 149: mtclose(dev, flag) ! 150: register dev_t dev; ! 151: register flag; ! 152: { ! 153: register struct mu_softc *sc = &mu_softc[MUUNIT(dev)]; ! 154: ! 155: if (flag == FWRITE || ((flag&FWRITE) && (sc->sc_flags&H_WRITTEN))) ! 156: mtcommand(dev, MT_CLS|sc->sc_dens, 1); ! 157: if ((minor(dev)&H_NOREWIND) == 0) ! 158: mtcommand(dev, MT_REW, 0); ! 159: sc->sc_openf = 0; ! 160: } ! 161: ! 162: mtcommand(dev, com, count) ! 163: dev_t dev; ! 164: int com, count; ! 165: { ! 166: register struct buf *bp; ! 167: ! 168: bp = &cmtbuf[MTUNIT(dev)]; ! 169: (void) 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: (void) spl0(); ! 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: ! 197: bp->av_forw = NULL; ! 198: dp = &mi->mi_tab; ! 199: (void) spl5(); ! 200: if (dp->b_actf == NULL) ! 201: dp->b_actf = bp; ! 202: else ! 203: dp->b_actl->av_forw = bp; ! 204: dp->b_actl = bp; ! 205: if (dp->b_active == 0) ! 206: mbustart(mi); ! 207: (void) spl0(); ! 208: } ! 209: ! 210: mtustart(mi) ! 211: register struct mba_device *mi; ! 212: { ! 213: register struct mtdevice *mtaddr = ! 214: (struct mtdevice *)mi->mi_drv; ! 215: register struct buf *bp = mi->mi_tab.b_actf; ! 216: register struct mu_softc *sc = &mu_softc[MUUNIT(bp->b_dev)]; ! 217: daddr_t blkno; ! 218: ! 219: sc->sc_flags &= ~H_WRITTEN; ! 220: if (sc->sc_openf < 0) { ! 221: bp->b_flags |= B_ERROR; ! 222: return (MBU_NEXT); ! 223: } ! 224: if (bp != &cmtbuf[MTUNIT(bp->b_dev)]) { ! 225: if (dbtofsb(bp->b_blkno) > sc->sc_nxrec) { ! 226: bp->b_flags |= B_ERROR; ! 227: bp->b_error = ENXIO; ! 228: return (MBU_NEXT); ! 229: } ! 230: if (dbtofsb(bp->b_blkno) == sc->sc_nxrec && ! 231: bp->b_flags&B_READ) { ! 232: bp->b_resid = bp->b_bcount; ! 233: clrbuf(bp); ! 234: return (MBU_NEXT); ! 235: } ! 236: if ((bp->b_flags&B_READ)==0) ! 237: sc->sc_nxrec = dbtofsb(bp->b_blkno) + 1; ! 238: } else { ! 239: mtaddr->mtncs[MUUNIT(bp->b_dev)] = ! 240: (bp->b_repcnt<<8)|bp->b_command|MT_GO; ! 241: return (MBU_STARTED); ! 242: } ! 243: if ((blkno = sc->sc_blkno) == dbtofsb(bp->b_blkno)) { ! 244: if (mi->mi_tab.b_errcnt == 2) { ! 245: mtaddr->mtca = MUUNIT(bp->b_dev); ! 246: } else { ! 247: mtaddr->mtbc = bp->b_bcount; ! 248: mtaddr->mtca = (1<<2)|MUUNIT(bp->b_dev); ! 249: } ! 250: return (MBU_DODATA); ! 251: } ! 252: if (blkno < dbtofsb(bp->b_blkno)) ! 253: mtaddr->mtncs[MUUNIT(bp->b_dev)] = ! 254: (min(dbtofsb(bp->b_blkno) - blkno, 0377)<<8)| MT_SFORW|MT_GO; ! 255: else ! 256: mtaddr->mtncs[MUUNIT(bp->b_dev)] = ! 257: (min(blkno - dbtofsb(bp->b_blkno), 0377)<<8)| MT_SREV|MT_GO; ! 258: return (MBU_STARTED); ! 259: } ! 260: ! 261: mtstart(mi) ! 262: register struct mba_device *mi; ! 263: { ! 264: register struct buf *bp = mi->mi_tab.b_actf; ! 265: register struct mu_softc *sc = &mu_softc[MUUNIT(bp->b_dev)]; ! 266: ! 267: if (bp->b_flags & B_READ) ! 268: if (mi->mi_tab.b_errcnt == 2) ! 269: return(MT_READREV|MT_GO); ! 270: else ! 271: return(MT_READ|MT_GO); ! 272: else ! 273: return(MT_WRITE|sc->sc_dens|MT_GO); ! 274: } ! 275: ! 276: mtdtint(mi, mbsr) ! 277: register struct mba_device *mi; ! 278: int mbsr; ! 279: { ! 280: register struct mtdevice *mtaddr = (struct mtdevice *)mi->mi_drv; ! 281: register struct buf *bp = mi->mi_tab.b_actf; ! 282: register struct mu_softc *sc; ! 283: ! 284: /* I'M NOT SURE IF THIS SHOULD ALWAYS BE THE CASE SO FOR NOW... */ ! 285: if ((mtaddr->mtca&3) != MUUNIT(bp->b_dev)) { ! 286: printf("mt: wrong unit!\n"); ! 287: mtaddr->mtca = MUUNIT(bp->b_dev); ! 288: } ! 289: sc = &mu_softc[MUUNIT(bp->b_dev)]; ! 290: sc->sc_erreg = mtaddr->mter; ! 291: if((bp->b_flags & B_READ) == 0) ! 292: sc->sc_flags |= H_WRITTEN; ! 293: switch (sc->sc_erreg & MTER_INTCODE) { ! 294: case MTER_DONE: ! 295: case MTER_LONGREC: ! 296: if (mi->mi_tab.b_errcnt != 2) ! 297: sc->sc_blkno++; ! 298: bp->b_resid = 0; ! 299: break; ! 300: ! 301: case MTER_NOTCAP: ! 302: printf("mu%d: blank tape\n", MUUNIT(bp->b_dev)); ! 303: goto err; ! 304: ! 305: case MTER_TM: ! 306: case MTER_EOT: ! 307: sc->sc_blkno++; ! 308: err: ! 309: bp->b_resid = bp->b_bcount; ! 310: sc->sc_nxrec = dbtofsb(bp->b_blkno); ! 311: break; ! 312: ! 313: case MTER_SHRTREC: ! 314: sc->sc_blkno++; ! 315: if (bp != &rmtbuf[MTUNIT(bp->b_dev)]) ! 316: bp->b_flags |= B_ERROR; ! 317: if (mi->mi_tab.b_errcnt == 2) ! 318: bp->b_bcount = bp->b_resid; /* restore saved value */ ! 319: bp->b_resid = bp->b_bcount - mtaddr->mtbc; ! 320: break; ! 321: ! 322: case MTER_RDOPP: ! 323: mi->mi_tab.b_errcnt = 2; /* indicate "read opposite" */ ! 324: bp->b_resid = bp->b_bcount; /* save it */ ! 325: bp->b_bcount = mtaddr->mtbc; /* use this instead */ ! 326: return(MBD_RETRY); ! 327: ! 328: case MTER_RETRY: ! 329: mi->mi_tab.b_errcnt = 1; /* indicate simple retry */ ! 330: return(MBD_RETRY); ! 331: ! 332: case MTER_OFFLINE: ! 333: if (sc->sc_openf > 0) { ! 334: sc->sc_openf = -1; ! 335: printf("mu%d: offline\n", MUUNIT(bp->b_dev)); ! 336: } ! 337: bp->b_flags |= B_ERROR; ! 338: break; ! 339: ! 340: case MTER_FPT: ! 341: printf("mu%d: no write ring\n", MUUNIT(bp->b_dev)); ! 342: bp->b_flags |= B_ERROR; ! 343: break; ! 344: ! 345: default: ! 346: printf("mu%d: hard error bn%d mbsr=%b er=%x ds=%b\n", ! 347: MUUNIT(bp->b_dev), bp->b_blkno, ! 348: mbsr, mbsr_bits, sc->sc_erreg, ! 349: sc->sc_dsreg, mtds_bits); ! 350: bp->b_flags |= B_ERROR; ! 351: mtaddr->mtid = MTID_CLR; /* reset the TM78 */ ! 352: DELAY(250); ! 353: while ((mtaddr->mtid & MTID_RDY) == 0) /* wait for it */ ! 354: ; ! 355: return (MBD_DONE); ! 356: } ! 357: /* CHECK FOR MBA ERROR WHEN NO OTHER ERROR INDICATED? */ ! 358: return (MBD_DONE); ! 359: } ! 360: ! 361: mtndtint(mi) ! 362: register struct mba_device *mi; ! 363: { ! 364: register struct mtdevice *mtaddr = (struct mtdevice *)mi->mi_drv; ! 365: register struct buf *bp = mi->mi_tab.b_actf; ! 366: register struct mu_softc *sc; ! 367: int er, fc, unit; ! 368: ! 369: unit = (mtaddr->mtner >> 8) & 3; ! 370: er = MASKREG(mtaddr->mtner); ! 371: /* WILL THIS OCCUR IF ANOTHER DRIVE COMES ONLINE? */ ! 372: if (bp == 0 || unit != MUUNIT(bp->b_dev)) { /* consistency check */ ! 373: if ((er & MTER_INTCODE) != MTER_ONLINE) ! 374: printf("mt: unit %d random interrupt\n", unit); ! 375: return (MBN_SKIP); ! 376: } ! 377: if (bp == 0) ! 378: return (MBN_SKIP); ! 379: fc = (mtaddr->mtncs[unit] >> 8) & 0xff; ! 380: sc = &mu_softc[unit]; ! 381: sc->sc_erreg = er; ! 382: sc->sc_resid = fc; ! 383: switch (er & MTER_INTCODE) { ! 384: case MTER_DONE: ! 385: if (bp == &cmtbuf[MTUNIT(bp->b_dev)]) { ! 386: done: ! 387: if (bp->b_command == MT_SENSE) ! 388: sc->sc_dsreg = MASKREG(mtaddr->mtds); ! 389: bp->b_resid = fc; ! 390: return (MBN_DONE); ! 391: } ! 392: /* this is UGLY! (but is it correct?) */ ! 393: if ((fc = dbtofsb(bp->b_blkno) - sc->sc_blkno) < 0) ! 394: sc->sc_blkno -= min(0377, -fc); ! 395: else ! 396: sc->sc_blkno += min(0377, fc); ! 397: return (MBN_RETRY); ! 398: ! 399: case MTER_RWDING: ! 400: return (MBN_SKIP); /* ignore "rewind started" interrupt */ ! 401: ! 402: case MTER_NOTCAP: ! 403: printf("mu%d: blank tape\n", MUUNIT(bp->b_dev)); ! 404: ! 405: case MTER_TM: ! 406: case MTER_EOT: ! 407: case MTER_LEOT: ! 408: if (sc->sc_blkno > dbtofsb(bp->b_blkno)) { ! 409: sc->sc_nxrec = dbtofsb(bp->b_blkno) + fc; ! 410: sc->sc_blkno = sc->sc_nxrec; ! 411: } else { ! 412: sc->sc_blkno = dbtofsb(bp->b_blkno) - fc; ! 413: sc->sc_nxrec = sc->sc_blkno - 1; ! 414: } ! 415: return (MBN_RETRY); ! 416: ! 417: case MTER_FPT: ! 418: printf("mu%d: no write ring\n", MUUNIT(bp->b_dev)); ! 419: bp->b_flags |= B_ERROR; ! 420: return (MBN_DONE); ! 421: ! 422: case MTER_OFFLINE: ! 423: if (sc->sc_openf > 0) { ! 424: sc->sc_openf = -1; ! 425: printf("mu%d: offline\n", MUUNIT(bp->b_dev)); ! 426: } ! 427: bp->b_flags |= B_ERROR; ! 428: return (MBN_DONE); ! 429: ! 430: case MTER_BOT: ! 431: if (bp == &cmtbuf[MTUNIT(bp->b_dev)]) ! 432: goto done; ! 433: /* FALL THROUGH */ ! 434: ! 435: default: ! 436: printf("mu%d: hard error bn%d er=%o ds=%b\n", ! 437: MUUNIT(bp->b_dev), bp->b_blkno, ! 438: sc->sc_erreg, sc->sc_dsreg, mtds_bits); ! 439: mtaddr->mtid = MTID_CLR; /* reset the TM78 */ ! 440: DELAY(250); ! 441: while ((mtaddr->mtid & MTID_RDY) == 0) /* wait for it */ ! 442: ; ! 443: bp->b_flags |= B_ERROR; ! 444: return (MBN_DONE); ! 445: } ! 446: /* NOTREACHED */ ! 447: } ! 448: ! 449: mtread(dev) ! 450: dev_t dev; ! 451: { ! 452: ! 453: mtphys(dev); ! 454: if (u.u_error) ! 455: return; ! 456: physio(mtstrategy, &rmtbuf[MTUNIT(dev)], dev, B_READ, minphys); ! 457: } ! 458: ! 459: mtwrite(dev) ! 460: { ! 461: ! 462: mtphys(dev); ! 463: if (u.u_error) ! 464: return; ! 465: physio(mtstrategy, &rmtbuf[MTUNIT(dev)], dev, B_WRITE, minphys); ! 466: } ! 467: ! 468: mtphys(dev) ! 469: dev_t dev; ! 470: { ! 471: register int mtunit; ! 472: register struct mu_softc *sc; ! 473: register struct mba_device *mi; ! 474: daddr_t a; ! 475: ! 476: mtunit = MTUNIT(dev); ! 477: if (mtunit >= NMT || (mi = mtinfo[mtunit]) == 0 || mi->mi_alive == 0) { ! 478: u.u_error = ENXIO; ! 479: return; ! 480: } ! 481: a = u.u_offset >> 9; ! 482: sc = &mu_softc[MUUNIT(dev)]; ! 483: sc->sc_blkno = dbtofsb(a); ! 484: sc->sc_nxrec = dbtofsb(a)+1; ! 485: } ! 486: ! 487: /*ARGSUSED*/ ! 488: mtioctl(dev, cmd, addr, flag) ! 489: dev_t dev; ! 490: int cmd; ! 491: caddr_t addr; ! 492: int flag; ! 493: { ! 494: register struct mu_softc *sc = &mu_softc[MUUNIT(dev)]; ! 495: register struct buf *bp = &cmtbuf[MTUNIT(dev)]; ! 496: register callcount; ! 497: register int n, op; ! 498: int fcount; ! 499: struct mtop mtop; ! 500: struct mtget mtget; ! 501: /* we depend of the values and order of the MT codes here */ ! 502: static mtops[] = ! 503: {MT_WTM,MT_SFORWF,MT_SREVF,MT_SFORW,MT_SREV,MT_REW,MT_UNLOAD,MT_SENSE}; ! 504: ! 505: switch (cmd) { ! 506: case MTIOCTOP: /* tape operation */ ! 507: if (copyin((caddr_t)addr, (caddr_t)&mtop, sizeof(mtop))) { ! 508: u.u_error = EFAULT; ! 509: return; ! 510: } ! 511: switch(mtop.mt_op) { ! 512: case MTWEOF: ! 513: callcount = mtop.mt_count; ! 514: fcount = 1; ! 515: break; ! 516: case MTFSF: case MTBSF: ! 517: callcount = mtop.mt_count; ! 518: fcount = 1; ! 519: break; ! 520: case MTFSR: case MTBSR: ! 521: callcount = 1; ! 522: fcount = mtop.mt_count; ! 523: break; ! 524: case MTREW: case MTOFFL: ! 525: callcount = 1; ! 526: fcount = 1; ! 527: break; ! 528: default: ! 529: u.u_error = ENXIO; ! 530: return; ! 531: } ! 532: if (callcount <= 0 || fcount <= 0) { ! 533: u.u_error = ENXIO; ! 534: return; ! 535: } ! 536: op = mtops[mtop.mt_op]; ! 537: if (op == MT_WTM) ! 538: op |= sc->sc_dens; ! 539: while (--callcount >= 0) { ! 540: register int n; ! 541: ! 542: do { ! 543: n = min(fcount, 0xff); ! 544: mtcommand(dev, op, n); ! 545: fcount -= n; ! 546: } while (fcount); ! 547: if ((mtop.mt_op == MTFSR || mtop.mt_op == MTBSR) && ! 548: bp->b_resid) { ! 549: u.u_error = EIO; ! 550: break; ! 551: } ! 552: if (bp->b_flags&B_ERROR) ! 553: break; ! 554: } ! 555: geterror(bp); ! 556: return; ! 557: case MTIOCGET: ! 558: mtget.mt_erreg = sc->sc_erreg; ! 559: mtget.mt_resid = sc->sc_resid; ! 560: mtcommand(dev, MT_SENSE, 1); /* update drive status */ ! 561: mtget.mt_dsreg = sc->sc_dsreg; ! 562: mtget.mt_type = MT_ISMT; ! 563: if (copyout((caddr_t)&mtget, addr, sizeof(mtget))) ! 564: u.u_error = EFAULT; ! 565: return; ! 566: default: ! 567: u.u_error = ENXIO; ! 568: } ! 569: } ! 570: ! 571: #define DBSIZE 20 ! 572: ! 573: mtdump() ! 574: { ! 575: register struct mba_device *mi; ! 576: register struct mba_regs *mp; ! 577: register struct mtdevice *mtaddr; ! 578: int blk, num; ! 579: int start; ! 580: ! 581: start = 0; ! 582: num = maxfree; ! 583: #define phys(a,b) ((b)((int)(a)&0x7fffffff)) ! 584: if (mtinfo[0] == 0) ! 585: return (ENXIO); ! 586: mi = phys(mtinfo[0], struct mba_device *); ! 587: mp = phys(mi->mi_hd, struct mba_hd *)->mh_physmba; ! 588: mp->mba_cr = MBCR_IE; ! 589: mtaddr = (struct mtdevice *)&mp->mba_drv[mi->mi_drive]; ! 590: #ifdef notyet ! 591: mtaddr->mttc = MTTC_PDP11|MTTC_1600BPI; ! 592: mtaddr->mtcs1 = MT_DCLR|MT_GO; ! 593: while (num > 0) { ! 594: blk = num > DBSIZE ? DBSIZE : num; ! 595: mtdwrite(start, blk, mtaddr, mp); ! 596: start += blk; ! 597: num -= blk; ! 598: } ! 599: mteof(mtaddr); ! 600: mteof(mtaddr); ! 601: mtwait(mtaddr); ! 602: if (mtaddr->mtds&MTDS_ERR) ! 603: return (EIO); ! 604: mtaddr->mtcs1 = MT_REW|MT_GO; ! 605: return (0); ! 606: } ! 607: ! 608: mtdwrite(dbuf, num, mtaddr, mp) ! 609: register dbuf, num; ! 610: register struct mtdevice *mtaddr; ! 611: struct mba_regs *mp; ! 612: { ! 613: register struct pte *io; ! 614: register int i; ! 615: ! 616: mtwait(mtaddr); ! 617: io = mp->mba_map; ! 618: for (i = 0; i < num; i++) ! 619: *(int *)io++ = dbuf++ | PG_V; ! 620: mtaddr->mtfc = -(num*NBPG); ! 621: mp->mba_sr = -1; ! 622: mp->mba_bcr = -(num*NBPG); ! 623: mp->mba_var = 0; ! 624: mtaddr->mtcs1 = MT_WCOM|MT_GO; ! 625: } ! 626: ! 627: mtwait(mtaddr) ! 628: struct mtdevice *mtaddr; ! 629: { ! 630: register s; ! 631: ! 632: do ! 633: s = mtaddr->mtds; ! 634: while ((s & MTDS_DRY) == 0); ! 635: } ! 636: ! 637: mteof(mtaddr) ! 638: struct mtdevice *mtaddr; ! 639: { ! 640: ! 641: mtwait(mtaddr); ! 642: mtaddr->mtcs1 = MT_WEOF|MT_GO; ! 643: #endif notyet ! 644: } ! 645: #endif
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