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1.1 ! nbrk 1: /* $OpenBSD: mt.c,v 1.18 2007/06/06 17:15:11 deraadt Exp $ */
! 2: /* $NetBSD: mt.c,v 1.8 1997/03/31 07:37:29 scottr Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1996, 1997 Jason R. Thorpe. All rights reserved.
! 6: * Copyright (c) 1992, The University of Utah and
! 7: * the Computer Systems Laboratory at the University of Utah (CSL).
! 8: * All rights reserved.
! 9: *
! 10: * Permission to use, copy, modify and distribute this software is hereby
! 11: * granted provided that (1) source code retains these copyright, permission,
! 12: * and disclaimer notices, and (2) redistributions including binaries
! 13: * reproduce the notices in supporting documentation, and (3) all advertising
! 14: * materials mentioning features or use of this software display the following
! 15: * acknowledgement: ``This product includes software developed by the
! 16: * Computer Systems Laboratory at the University of Utah.''
! 17: *
! 18: * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
! 19: * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
! 20: * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
! 21: *
! 22: * CSL requests users of this software to return to csl-dist@cs.utah.edu any
! 23: * improvements that they make and grant CSL redistribution rights.
! 24: *
! 25: * Utah $Hdr: mt.c 1.8 95/09/12$
! 26: */
! 27: /* @(#)mt.c 3.9 90/07/10 mt Xinu
! 28: *
! 29: * Magnetic tape driver (7974a, 7978a/b, 7979a, 7980a, 7980xc)
! 30: * Original version contributed by Mt. Xinu.
! 31: * Modified for 4.4BSD by Mark Davies and Andrew Vignaux, Department of
! 32: * Computer Science, Victoria University of Wellington
! 33: */
! 34:
! 35: #include <sys/param.h>
! 36: #include <sys/systm.h>
! 37: #include <sys/buf.h>
! 38: #include <sys/ioctl.h>
! 39: #include <sys/mtio.h>
! 40: #include <sys/file.h>
! 41: #include <sys/proc.h>
! 42: #include <sys/errno.h>
! 43: #include <sys/syslog.h>
! 44: #include <sys/tty.h>
! 45: #include <sys/kernel.h>
! 46: #include <sys/device.h>
! 47: #include <sys/conf.h>
! 48:
! 49: #include <hp300/dev/hpibvar.h>
! 50:
! 51: #include <hp300/dev/mtreg.h>
! 52:
! 53: struct mtinfo {
! 54: u_short hwid;
! 55: char *desc;
! 56: } mtinfo[] = {
! 57: { MT7978ID, "7978" },
! 58: { MT7979AID, "7979A" },
! 59: { MT7980ID, "7980" },
! 60: { MT7974AID, "7974A" },
! 61: };
! 62: int nmtinfo = sizeof(mtinfo) / sizeof(mtinfo[0]);
! 63:
! 64: struct mt_softc {
! 65: struct device sc_dev;
! 66: int sc_hpibno; /* logical HPIB this slave it attached to */
! 67: int sc_slave; /* HPIB slave address (0-6) */
! 68: short sc_flags; /* see below */
! 69: u_char sc_lastdsj; /* place for DSJ in mtreaddsj() */
! 70: u_char sc_lastecmd; /* place for End Command in mtreaddsj() */
! 71: short sc_recvtimeo; /* count of hpibsend timeouts to prevent hang */
! 72: short sc_statindex; /* index for next sc_stat when MTF_STATTIMEO */
! 73: struct mt_stat sc_stat;/* status bytes last read from device */
! 74: short sc_density; /* current density of tape (mtio.h format) */
! 75: short sc_type; /* tape drive model (hardware IDs) */
! 76: struct hpibqueue sc_hq; /* HPIB device queue member */
! 77: struct buf sc_tab; /* buf queue */
! 78: struct buf sc_bufstore; /* XXX buffer storage */
! 79: struct timeout sc_start_to; /* spl_mtstart timeout */
! 80: struct timeout sc_intr_to; /* spl_mtintr timeout */
! 81: };
! 82:
! 83: #ifdef DEBUG
! 84: int mtdebug = 0;
! 85: #define dlog if (mtdebug) log
! 86: #else
! 87: #define dlog if (0) log
! 88: #endif
! 89:
! 90: #define UNIT(x) (minor(x) & 3)
! 91:
! 92: #define B_CMD B_XXX /* command buf instead of data */
! 93: #define b_cmd b_blkno /* blkno holds cmd when B_CMD */
! 94:
! 95: int mtmatch(struct device *, void *, void *);
! 96: void mtattach(struct device *, struct device *, void *);
! 97:
! 98: struct cfattach mt_ca = {
! 99: sizeof(struct mt_softc), mtmatch, mtattach
! 100: };
! 101:
! 102: struct cfdriver mt_cd = {
! 103: NULL, "mt", DV_TAPE
! 104: };
! 105:
! 106: int mtident(struct mt_softc *, struct hpibbus_attach_args *);
! 107: void mtustart(struct mt_softc *);
! 108: int mtreaddsj(struct mt_softc *, int);
! 109: int mtcommand(dev_t, int, int);
! 110: void spl_mtintr(void *);
! 111: void spl_mtstart(void *);
! 112:
! 113: void mtstart(void *);
! 114: void mtgo(void *);
! 115: void mtintr(void *);
! 116:
! 117: bdev_decl(mt);
! 118: cdev_decl(mt);
! 119:
! 120: int
! 121: mtmatch(parent, match, aux)
! 122: struct device *parent;
! 123: void *match, *aux;
! 124: {
! 125: struct hpibbus_attach_args *ha = aux;
! 126:
! 127: return (mtident(NULL, ha));
! 128: }
! 129:
! 130: void
! 131: mtattach(parent, self, aux)
! 132: struct device *parent, *self;
! 133: void *aux;
! 134: {
! 135: struct mt_softc *sc = (struct mt_softc *)self;
! 136: struct hpibbus_attach_args *ha = aux;
! 137: int unit, hpibno, slave;
! 138:
! 139: if (mtident(sc, ha) == 0) {
! 140: printf("\n%s: impossible!\n", sc->sc_dev.dv_xname);
! 141: return;
! 142: }
! 143:
! 144: unit = self->dv_unit;
! 145: hpibno = parent->dv_unit;
! 146: slave = ha->ha_slave;
! 147:
! 148: sc->sc_tab.b_actb = &sc->sc_tab.b_actf;
! 149:
! 150: sc->sc_hpibno = hpibno;
! 151: sc->sc_slave = slave;
! 152: sc->sc_flags = MTF_EXISTS;
! 153:
! 154: /* Initialize hpib job queue entry. */
! 155: sc->sc_hq.hq_softc = sc;
! 156: sc->sc_hq.hq_slave = sc->sc_slave;
! 157: sc->sc_hq.hq_start = mtstart;
! 158: sc->sc_hq.hq_go = mtgo;
! 159: sc->sc_hq.hq_intr = mtintr;
! 160:
! 161: /* Initialize timeout structures */
! 162: timeout_set(&sc->sc_start_to, spl_mtstart, sc);
! 163: timeout_set(&sc->sc_intr_to, spl_mtintr, sc);
! 164: }
! 165:
! 166: int
! 167: mtident(sc, ha)
! 168: struct mt_softc *sc;
! 169: struct hpibbus_attach_args *ha;
! 170: {
! 171: int i;
! 172:
! 173: for (i = 0; i < nmtinfo; i++) {
! 174: if (ha->ha_id == mtinfo[i].hwid &&
! 175: ha->ha_punit == 0) {
! 176: if (sc != NULL) {
! 177: sc->sc_type = mtinfo[i].hwid;
! 178: printf(": %s tape\n", mtinfo[i].desc);
! 179: }
! 180: return (1);
! 181: }
! 182: }
! 183: return (0);
! 184: }
! 185:
! 186: /*
! 187: * Perform a read of "Device Status Jump" register and update the
! 188: * status if necessary. If status is read, the given "ecmd" is also
! 189: * performed, unless "ecmd" is zero. Returns DSJ value, -1 on failure
! 190: * and -2 on "temporary" failure.
! 191: */
! 192: int
! 193: mtreaddsj(sc, ecmd)
! 194: struct mt_softc *sc;
! 195: int ecmd;
! 196: {
! 197: int retval;
! 198:
! 199: if (sc->sc_flags & MTF_STATTIMEO)
! 200: goto getstats;
! 201: retval = hpibrecv(sc->sc_hpibno,
! 202: (sc->sc_flags & MTF_DSJTIMEO) ? -1 : sc->sc_slave,
! 203: MTT_DSJ, &(sc->sc_lastdsj), 1);
! 204: sc->sc_flags &= ~MTF_DSJTIMEO;
! 205: if (retval != 1) {
! 206: dlog(LOG_DEBUG, "%s can't hpibrecv DSJ",
! 207: sc->sc_dev.dv_xname);
! 208: if (sc->sc_recvtimeo == 0)
! 209: sc->sc_recvtimeo = hz;
! 210: if (--sc->sc_recvtimeo == 0)
! 211: return (-1);
! 212: if (retval == 0)
! 213: sc->sc_flags |= MTF_DSJTIMEO;
! 214: return (-2);
! 215: }
! 216: sc->sc_recvtimeo = 0;
! 217: sc->sc_statindex = 0;
! 218: dlog(LOG_DEBUG, "%s readdsj: 0x%x", sc->sc_dev.dv_xname,
! 219: sc->sc_lastdsj);
! 220: sc->sc_lastecmd = ecmd;
! 221: switch (sc->sc_lastdsj) {
! 222: case 0:
! 223: if (ecmd & MTE_DSJ_FORCE)
! 224: break;
! 225: return (0);
! 226:
! 227: case 2:
! 228: sc->sc_lastecmd = MTE_COMPLETE;
! 229: case 1:
! 230: break;
! 231:
! 232: default:
! 233: log(LOG_ERR, "%s readdsj: DSJ 0x%x\n", sc->sc_dev.dv_xname,
! 234: sc->sc_lastdsj);
! 235: return (-1);
! 236: }
! 237: getstats:
! 238: retval = hpibrecv(sc->sc_hpibno,
! 239: (sc->sc_flags & MTF_STATCONT) ? -1 : sc->sc_slave,
! 240: MTT_STAT, ((char *)&(sc->sc_stat)) + sc->sc_statindex,
! 241: sizeof(sc->sc_stat) - sc->sc_statindex);
! 242: sc->sc_flags &= ~(MTF_STATTIMEO | MTF_STATCONT);
! 243: if (retval != sizeof(sc->sc_stat) - sc->sc_statindex) {
! 244: if (sc->sc_recvtimeo == 0)
! 245: sc->sc_recvtimeo = hz;
! 246: if (--sc->sc_recvtimeo != 0) {
! 247: if (retval >= 0) {
! 248: sc->sc_statindex += retval;
! 249: sc->sc_flags |= MTF_STATCONT;
! 250: }
! 251: sc->sc_flags |= MTF_STATTIMEO;
! 252: return (-2);
! 253: }
! 254: log(LOG_ERR, "%s readdsj: can't read status",
! 255: sc->sc_dev.dv_xname);
! 256: return (-1);
! 257: }
! 258: sc->sc_recvtimeo = 0;
! 259: sc->sc_statindex = 0;
! 260: dlog(LOG_DEBUG, "%s readdsj: status is %x %x %x %x %x %x",
! 261: sc->sc_dev.dv_xname,
! 262: sc->sc_stat1, sc->sc_stat2, sc->sc_stat3,
! 263: sc->sc_stat4, sc->sc_stat5, sc->sc_stat6);
! 264: if (sc->sc_lastecmd)
! 265: (void) hpibsend(sc->sc_hpibno, sc->sc_slave,
! 266: MTL_ECMD, &(sc->sc_lastecmd), 1);
! 267: return ((int) sc->sc_lastdsj);
! 268: }
! 269:
! 270: int
! 271: mtopen(dev, flag, mode, p)
! 272: dev_t dev;
! 273: int flag, mode;
! 274: struct proc *p;
! 275: {
! 276: int unit = UNIT(dev);
! 277: struct mt_softc *sc;
! 278: int req_den;
! 279: int error;
! 280:
! 281: if (unit >= mt_cd.cd_ndevs ||
! 282: (sc = mt_cd.cd_devs[unit]) == NULL ||
! 283: (sc->sc_flags & MTF_EXISTS) == 0)
! 284: return (ENXIO);
! 285:
! 286: dlog(LOG_DEBUG, "%s open: flags 0x%x", sc->sc_dev.dv_xname,
! 287: sc->sc_flags);
! 288: if (sc->sc_flags & MTF_OPEN)
! 289: return (EBUSY);
! 290: sc->sc_flags |= MTF_OPEN;
! 291: if ((sc->sc_flags & MTF_ALIVE) == 0) {
! 292: error = mtcommand(dev, MTRESET, 0);
! 293: if (error != 0 || (sc->sc_flags & MTF_ALIVE) == 0)
! 294: goto errout;
! 295: if ((sc->sc_stat1 & (SR1_BOT | SR1_ONLINE)) == SR1_ONLINE)
! 296: (void) mtcommand(dev, MTREW, 0);
! 297: }
! 298: for (;;) {
! 299: if ((error = mtcommand(dev, MTNOP, 0)) != 0)
! 300: goto errout;
! 301: if (!(sc->sc_flags & MTF_REW))
! 302: break;
! 303: if (tsleep((caddr_t) &lbolt, PCATCH | (PZERO + 1),
! 304: "mt", 0) != 0) {
! 305: error = EINTR;
! 306: goto errout;
! 307: }
! 308: }
! 309: if ((flag & FWRITE) && (sc->sc_stat1 & SR1_RO)) {
! 310: error = EROFS;
! 311: goto errout;
! 312: }
! 313: if (!(sc->sc_stat1 & SR1_ONLINE)) {
! 314: uprintf("%s: not online\n", sc->sc_dev.dv_xname);
! 315: error = EIO;
! 316: goto errout;
! 317: }
! 318: /*
! 319: * Select density:
! 320: * - find out what density the drive is set to
! 321: * (i.e. the density of the current tape)
! 322: * - if we are going to write
! 323: * - if we're not at the beginning of the tape
! 324: * - complain if we want to change densities
! 325: * - otherwise, select the mtcommand to set the density
! 326: *
! 327: * If the drive doesn't support it then don't change the recorded
! 328: * density.
! 329: *
! 330: * The original MOREbsd code had these additional conditions
! 331: * for the mid-tape change
! 332: *
! 333: * req_den != T_BADBPI &&
! 334: * sc->sc_density != T_6250BPI
! 335: *
! 336: * which suggests that it would be possible to write multiple
! 337: * densities if req_den == T_BAD_BPI or the current tape
! 338: * density was 6250. Testing of our 7980 suggests that the
! 339: * device cannot change densities mid-tape.
! 340: *
! 341: * ajv@comp.vuw.ac.nz
! 342: */
! 343: sc->sc_density = (sc->sc_stat2 & SR2_6250) ? T_6250BPI : (
! 344: (sc->sc_stat3 & SR3_1600) ? T_1600BPI : (
! 345: (sc->sc_stat3 & SR3_800) ? T_800BPI : -1));
! 346: req_den = (dev & T_DENSEL);
! 347:
! 348: if (flag & FWRITE) {
! 349: if (!(sc->sc_stat1 & SR1_BOT)) {
! 350: if (sc->sc_density != req_den) {
! 351: uprintf("%s: can't change density mid-tape\n",
! 352: sc->sc_dev.dv_xname);
! 353: error = EIO;
! 354: goto errout;
! 355: }
! 356: }
! 357: else {
! 358: int mtset_density =
! 359: (req_den == T_800BPI ? MTSET800BPI : (
! 360: req_den == T_1600BPI ? MTSET1600BPI : (
! 361: req_den == T_6250BPI ? MTSET6250BPI : (
! 362: sc->sc_type == MT7980ID
! 363: ? MTSET6250DC
! 364: : MTSET6250BPI))));
! 365: if (mtcommand(dev, mtset_density, 0) == 0)
! 366: sc->sc_density = req_den;
! 367: }
! 368: }
! 369: return (0);
! 370: errout:
! 371: sc->sc_flags &= ~MTF_OPEN;
! 372: return (error);
! 373: }
! 374:
! 375: int
! 376: mtclose(dev, flag, fmt, p)
! 377: dev_t dev;
! 378: int flag, fmt;
! 379: struct proc *p;
! 380: {
! 381: struct mt_softc *sc = mt_cd.cd_devs[UNIT(dev)];
! 382:
! 383: if (sc->sc_flags & MTF_WRT) {
! 384: (void) mtcommand(dev, MTWEOF, 2);
! 385: (void) mtcommand(dev, MTBSF, 0);
! 386: }
! 387: if ((minor(dev) & T_NOREWIND) == 0)
! 388: (void) mtcommand(dev, MTREW, 0);
! 389: sc->sc_flags &= ~MTF_OPEN;
! 390: return (0);
! 391: }
! 392:
! 393: int
! 394: mtcommand(dev, cmd, cnt)
! 395: dev_t dev;
! 396: int cmd;
! 397: int cnt;
! 398: {
! 399: struct mt_softc *sc = mt_cd.cd_devs[UNIT(dev)];
! 400: struct buf *bp = &sc->sc_bufstore;
! 401: int error = 0;
! 402:
! 403: #if 1
! 404: if (bp->b_flags & B_BUSY)
! 405: return (EBUSY);
! 406: #endif
! 407: bp->b_cmd = cmd;
! 408: bp->b_dev = dev;
! 409: do {
! 410: bp->b_flags = B_BUSY | B_CMD;
! 411: mtstrategy(bp);
! 412: biowait(bp);
! 413: if (bp->b_flags & B_ERROR) {
! 414: error = (int) (unsigned) bp->b_error;
! 415: break;
! 416: }
! 417: } while (--cnt > 0);
! 418: #if 0
! 419: bp->b_flags = 0 /*&= ~B_BUSY*/;
! 420: #else
! 421: bp->b_flags &= ~B_BUSY;
! 422: #endif
! 423: return (error);
! 424: }
! 425:
! 426: /*
! 427: * Only thing to check here is for legal record lengths (writes only).
! 428: */
! 429: void
! 430: mtstrategy(bp)
! 431: struct buf *bp;
! 432: {
! 433: struct mt_softc *sc;
! 434: struct buf *dp;
! 435: int unit;
! 436: int s;
! 437:
! 438: unit = UNIT(bp->b_dev);
! 439: sc = mt_cd.cd_devs[unit];
! 440: dlog(LOG_DEBUG, "%s strategy", sc->sc_dev.dv_xname);
! 441: if ((bp->b_flags & (B_CMD | B_READ)) == 0) {
! 442: #define WRITE_BITS_IGNORED 8
! 443: #if 0
! 444: if (bp->b_bcount & ((1 << WRITE_BITS_IGNORED) - 1)) {
! 445: printf("%s: write record must be multiple of %d\n",
! 446: sc->sc_dev.dv_xname, 1 << WRITE_BITS_IGNORED);
! 447: goto error;
! 448: }
! 449: #endif
! 450: s = 16 * 1024;
! 451: if (sc->sc_stat2 & SR2_LONGREC) {
! 452: switch (sc->sc_density) {
! 453: case T_1600BPI:
! 454: s = 32 * 1024;
! 455: break;
! 456:
! 457: case T_6250BPI:
! 458: case T_BADBPI:
! 459: s = 60 * 1024;
! 460: break;
! 461: }
! 462: }
! 463: if (bp->b_bcount > s) {
! 464: printf("%s: write record (%ld) too big: limit (%d)\n",
! 465: sc->sc_dev.dv_xname, bp->b_bcount, s);
! 466: #if 0 /* XXX see above */
! 467: error:
! 468: #endif
! 469: bp->b_flags |= B_ERROR;
! 470: bp->b_error = EIO;
! 471: s = splbio();
! 472: biodone(bp);
! 473: splx(s);
! 474: return;
! 475: }
! 476: }
! 477: dp = &sc->sc_tab;
! 478: bp->b_actf = NULL;
! 479: s = splbio();
! 480: bp->b_actb = dp->b_actb;
! 481: *dp->b_actb = bp;
! 482: dp->b_actb = &bp->b_actf;
! 483: if (dp->b_active == 0) {
! 484: dp->b_active = 1;
! 485: mtustart(sc);
! 486: }
! 487: splx(s);
! 488: }
! 489:
! 490: void
! 491: mtustart(sc)
! 492: struct mt_softc *sc;
! 493: {
! 494:
! 495: dlog(LOG_DEBUG, "%s ustart", sc->sc_dev.dv_xname);
! 496: if (hpibreq(sc->sc_dev.dv_parent, &sc->sc_hq))
! 497: mtstart(sc);
! 498: }
! 499:
! 500: void
! 501: spl_mtintr(arg)
! 502: void *arg;
! 503: {
! 504: struct mt_softc *sc = arg;
! 505: int s = splbio();
! 506:
! 507: hpibppclear(sc->sc_hpibno);
! 508: mtintr(sc);
! 509: splx(s);
! 510: }
! 511:
! 512: void
! 513: spl_mtstart(arg)
! 514: void *arg;
! 515: {
! 516: int s = splbio();
! 517:
! 518: mtstart(arg);
! 519: splx(s);
! 520: }
! 521:
! 522: void
! 523: mtstart(arg)
! 524: void *arg;
! 525: {
! 526: struct mt_softc *sc = arg;
! 527: struct buf *bp, *dp;
! 528: short cmdcount = 1;
! 529: u_char cmdbuf[2];
! 530: int s;
! 531:
! 532: dlog(LOG_DEBUG, "%s start", sc->sc_dev.dv_xname);
! 533: sc->sc_flags &= ~MTF_WRT;
! 534: bp = sc->sc_tab.b_actf;
! 535: if ((sc->sc_flags & MTF_ALIVE) == 0 &&
! 536: ((bp->b_flags & B_CMD) == 0 || bp->b_cmd != MTRESET))
! 537: goto fatalerror;
! 538:
! 539: if (sc->sc_flags & MTF_REW) {
! 540: if (!hpibpptest(sc->sc_hpibno, sc->sc_slave))
! 541: goto stillrew;
! 542: switch (mtreaddsj(sc, MTE_DSJ_FORCE|MTE_COMPLETE|MTE_IDLE)) {
! 543: case 0:
! 544: case 1:
! 545: stillrew:
! 546: if ((sc->sc_stat1 & SR1_BOT) ||
! 547: !(sc->sc_stat1 & SR1_ONLINE)) {
! 548: sc->sc_flags &= ~MTF_REW;
! 549: break;
! 550: }
! 551: case -2:
! 552: /*
! 553: * -2 means "timeout" reading DSJ, which is probably
! 554: * temporary. This is considered OK when doing a NOP,
! 555: * but not otherwise.
! 556: */
! 557: if (sc->sc_flags & (MTF_DSJTIMEO | MTF_STATTIMEO)) {
! 558: timeout_add(&sc->sc_start_to, hz >> 5);
! 559: return;
! 560: }
! 561: case 2:
! 562: if (bp->b_cmd != MTNOP || !(bp->b_flags & B_CMD)) {
! 563: bp->b_error = EBUSY;
! 564: goto errdone;
! 565: }
! 566: goto done;
! 567:
! 568: default:
! 569: goto fatalerror;
! 570: }
! 571: }
! 572: if (bp->b_flags & B_CMD) {
! 573: if (sc->sc_flags & MTF_PASTEOT) {
! 574: switch(bp->b_cmd) {
! 575: case MTFSF:
! 576: case MTWEOF:
! 577: case MTFSR:
! 578: bp->b_error = ENOSPC;
! 579: goto errdone;
! 580:
! 581: case MTBSF:
! 582: case MTOFFL:
! 583: case MTBSR:
! 584: case MTREW:
! 585: sc->sc_flags &= ~(MTF_PASTEOT | MTF_ATEOT);
! 586: break;
! 587: }
! 588: }
! 589: switch(bp->b_cmd) {
! 590: case MTFSF:
! 591: if (sc->sc_flags & MTF_HITEOF)
! 592: goto done;
! 593: cmdbuf[0] = MTTC_FSF;
! 594: break;
! 595:
! 596: case MTBSF:
! 597: if (sc->sc_flags & MTF_HITBOF)
! 598: goto done;
! 599: cmdbuf[0] = MTTC_BSF;
! 600: break;
! 601:
! 602: case MTOFFL:
! 603: sc->sc_flags |= MTF_REW;
! 604: cmdbuf[0] = MTTC_REWOFF;
! 605: break;
! 606:
! 607: case MTWEOF:
! 608: cmdbuf[0] = MTTC_WFM;
! 609: break;
! 610:
! 611: case MTBSR:
! 612: cmdbuf[0] = MTTC_BSR;
! 613: break;
! 614:
! 615: case MTFSR:
! 616: cmdbuf[0] = MTTC_FSR;
! 617: break;
! 618:
! 619: case MTREW:
! 620: sc->sc_flags |= MTF_REW;
! 621: cmdbuf[0] = MTTC_REW;
! 622: break;
! 623:
! 624: case MTNOP:
! 625: /*
! 626: * NOP is supposed to set status bits.
! 627: * Force readdsj to do it.
! 628: */
! 629: switch (mtreaddsj(sc,
! 630: MTE_DSJ_FORCE | MTE_COMPLETE | MTE_IDLE)) {
! 631: default:
! 632: goto done;
! 633:
! 634: case -1:
! 635: /*
! 636: * If this fails, perform a device clear
! 637: * to fix any protocol problems and (most
! 638: * likely) get the status.
! 639: */
! 640: bp->b_cmd = MTRESET;
! 641: break;
! 642:
! 643: case -2:
! 644: timeout_add(&sc->sc_start_to, hz >> 5);
! 645: return;
! 646: }
! 647:
! 648: case MTRESET:
! 649: /*
! 650: * 1) selected device clear (send with "-2" secondary)
! 651: * 2) set timeout, then wait for "service request"
! 652: * 3) interrupt will read DSJ (and END COMPLETE-IDLE)
! 653: */
! 654: if (hpibsend(sc->sc_hpibno, sc->sc_slave, -2, NULL, 0)){
! 655: log(LOG_ERR, "%s can't reset",
! 656: sc->sc_dev.dv_xname);
! 657: goto fatalerror;
! 658: }
! 659: timeout_add(&sc->sc_intr_to, 4 * hz);
! 660: hpibawait(sc->sc_hpibno);
! 661: return;
! 662:
! 663: case MTSET800BPI:
! 664: cmdbuf[0] = MTTC_800;
! 665: break;
! 666:
! 667: case MTSET1600BPI:
! 668: cmdbuf[0] = MTTC_1600;
! 669: break;
! 670:
! 671: case MTSET6250BPI:
! 672: cmdbuf[0] = MTTC_6250;
! 673: break;
! 674:
! 675: case MTSET6250DC:
! 676: cmdbuf[0] = MTTC_DC6250;
! 677: break;
! 678: }
! 679: } else {
! 680: if (sc->sc_flags & MTF_PASTEOT) {
! 681: bp->b_error = ENOSPC;
! 682: goto errdone;
! 683: }
! 684: if (bp->b_flags & B_READ) {
! 685: sc->sc_flags |= MTF_IO;
! 686: cmdbuf[0] = MTTC_READ;
! 687: } else {
! 688: sc->sc_flags |= MTF_WRT | MTF_IO;
! 689: cmdbuf[0] = MTTC_WRITE;
! 690: cmdbuf[1] = (bp->b_bcount + ((1 << WRITE_BITS_IGNORED) - 1)) >> WRITE_BITS_IGNORED;
! 691: cmdcount = 2;
! 692: }
! 693: }
! 694: if (hpibsend(sc->sc_hpibno, sc->sc_slave, MTL_TCMD, cmdbuf, cmdcount)
! 695: == cmdcount) {
! 696: if (sc->sc_flags & MTF_REW)
! 697: goto done;
! 698: hpibawait(sc->sc_hpibno);
! 699: return;
! 700: }
! 701: fatalerror:
! 702: /*
! 703: * If anything fails, the drive is probably hosed, so mark it not
! 704: * "ALIVE" (but it EXISTS and is OPEN or we wouldn't be here, and
! 705: * if, last we heard, it was REWinding, remember that).
! 706: */
! 707: sc->sc_flags &= MTF_EXISTS | MTF_OPEN | MTF_REW;
! 708: bp->b_error = EIO;
! 709: errdone:
! 710: bp->b_flags |= B_ERROR;
! 711: done:
! 712: sc->sc_flags &= ~(MTF_HITEOF | MTF_HITBOF);
! 713: s = splbio();
! 714: biodone(bp);
! 715: splx(s);
! 716: if ((dp = bp->b_actf))
! 717: dp->b_actb = bp->b_actb;
! 718: else
! 719: sc->sc_tab.b_actb = bp->b_actb;
! 720: *bp->b_actb = dp;
! 721: hpibfree(sc->sc_dev.dv_parent, &sc->sc_hq);
! 722: if ((bp = dp) == NULL)
! 723: sc->sc_tab.b_active = 0;
! 724: else
! 725: mtustart(sc);
! 726: }
! 727:
! 728: /*
! 729: * The Utah code had a bug which meant that the driver was unable to read.
! 730: * "rw" was initialized to bp->b_flags & B_READ before "bp" was initialized.
! 731: * -- ajv@comp.vuw.ac.nz
! 732: */
! 733: void
! 734: mtgo(arg)
! 735: void *arg;
! 736: {
! 737: struct mt_softc *sc = arg;
! 738: struct buf *bp;
! 739: int rw;
! 740:
! 741: dlog(LOG_DEBUG, "%s go", sc->sc_dev.dv_xname);
! 742: bp = sc->sc_tab.b_actf;
! 743: rw = bp->b_flags & B_READ;
! 744: hpibgo(sc->sc_hpibno, sc->sc_slave, rw ? MTT_READ : MTL_WRITE,
! 745: bp->b_data, bp->b_bcount, rw, rw != 0);
! 746: }
! 747:
! 748: void
! 749: mtintr(arg)
! 750: void *arg;
! 751: {
! 752: struct mt_softc *sc = arg;
! 753: struct buf *bp, *dp;
! 754: int i;
! 755: u_char cmdbuf[4];
! 756:
! 757: bp = sc->sc_tab.b_actf;
! 758: if (bp == NULL) {
! 759: log(LOG_ERR, "%s intr: bp == NULL", sc->sc_dev.dv_xname);
! 760: return;
! 761: }
! 762:
! 763: dlog(LOG_DEBUG, "%s intr", sc->sc_dev.dv_xname);
! 764:
! 765: /*
! 766: * Some operation completed. Read status bytes and report errors.
! 767: * Clear EOF flags here `cause they're set once on specific conditions
! 768: * below when a command succeeds.
! 769: * A DSJ of 2 always means keep waiting. If the command was READ
! 770: * (and we're in data DMA phase) stop data transfer first.
! 771: */
! 772: sc->sc_flags &= ~(MTF_HITEOF | MTF_HITBOF);
! 773: if ((bp->b_flags & (B_CMD|B_READ)) == B_READ &&
! 774: !(sc->sc_flags & (MTF_IO | MTF_STATTIMEO | MTF_DSJTIMEO))){
! 775: cmdbuf[0] = MTE_STOP;
! 776: (void) hpibsend(sc->sc_hpibno, sc->sc_slave, MTL_ECMD,cmdbuf,1);
! 777: }
! 778: switch (mtreaddsj(sc, 0)) {
! 779: case 0:
! 780: break;
! 781:
! 782: case 1:
! 783: /*
! 784: * If we're in the middle of a READ/WRITE and have yet to
! 785: * start the data transfer, a DSJ of one should terminate it.
! 786: */
! 787: sc->sc_flags &= ~MTF_IO;
! 788: break;
! 789:
! 790: case 2:
! 791: (void) hpibawait(sc->sc_hpibno);
! 792: return;
! 793:
! 794: case -2:
! 795: /*
! 796: * -2 means that the drive failed to respond quickly enough
! 797: * to the request for DSJ. It's probably just "busy" figuring
! 798: * it out and will know in a little bit...
! 799: */
! 800: timeout_add(&sc->sc_intr_to, hz >> 5);
! 801: return;
! 802:
! 803: default:
! 804: log(LOG_ERR, "%s intr: can't get drive stat",
! 805: sc->sc_dev.dv_xname);
! 806: goto error;
! 807: }
! 808: if (sc->sc_stat1 & (SR1_ERR | SR1_REJECT)) {
! 809: i = sc->sc_stat4 & SR4_ERCLMASK;
! 810: log(LOG_ERR, "%s: %s error, retry %d, SR2/3 %x/%x, code %d",
! 811: sc->sc_dev.dv_xname, i == SR4_DEVICE ? "device" :
! 812: (i == SR4_PROTOCOL ? "protocol" :
! 813: (i == SR4_SELFTEST ? "selftest" : "unknown")),
! 814: sc->sc_stat4 & SR4_RETRYMASK, sc->sc_stat2,
! 815: sc->sc_stat3, sc->sc_stat5);
! 816:
! 817: if ((bp->b_flags & B_CMD) && bp->b_cmd == MTRESET)
! 818: timeout_del(&sc->sc_intr_to);
! 819: if (sc->sc_stat3 & SR3_POWERUP)
! 820: sc->sc_flags &= MTF_OPEN | MTF_EXISTS;
! 821: goto error;
! 822: }
! 823: /*
! 824: * Report and clear any soft errors.
! 825: */
! 826: if (sc->sc_stat1 & SR1_SOFTERR) {
! 827: log(LOG_WARNING, "%s: soft error, retry %d\n",
! 828: sc->sc_dev.dv_xname, sc->sc_stat4 & SR4_RETRYMASK);
! 829: sc->sc_stat1 &= ~SR1_SOFTERR;
! 830: }
! 831: /*
! 832: * We've initiated a read or write, but haven't actually started to
! 833: * DMA the data yet. At this point, the drive's ready.
! 834: */
! 835: if (sc->sc_flags & MTF_IO) {
! 836: sc->sc_flags &= ~MTF_IO;
! 837: if (hpibustart(sc->sc_hpibno))
! 838: mtgo(sc);
! 839: return;
! 840: }
! 841: /*
! 842: * Check for End Of Tape - we're allowed to hit EOT and then write (or
! 843: * read) one more record. If we get here and have not already hit EOT,
! 844: * return ENOSPC to inform the process that it's hit it. If we get
! 845: * here and HAVE already hit EOT, don't allow any more operations that
! 846: * move the tape forward.
! 847: */
! 848: if (sc->sc_stat1 & SR1_EOT) {
! 849: if (sc->sc_flags & MTF_ATEOT)
! 850: sc->sc_flags |= MTF_PASTEOT;
! 851: else {
! 852: bp->b_flags |= B_ERROR;
! 853: bp->b_error = ENOSPC;
! 854: sc->sc_flags |= MTF_ATEOT;
! 855: }
! 856: }
! 857: /*
! 858: * If a motion command was being executed, check for Tape Marks.
! 859: * If we were doing data, make sure we got the right amount, and
! 860: * check for hitting tape marks on reads.
! 861: */
! 862: if (bp->b_flags & B_CMD) {
! 863: if (sc->sc_stat1 & SR1_EOF) {
! 864: if (bp->b_cmd == MTFSR)
! 865: sc->sc_flags |= MTF_HITEOF;
! 866: if (bp->b_cmd == MTBSR)
! 867: sc->sc_flags |= MTF_HITBOF;
! 868: }
! 869: if (bp->b_cmd == MTRESET) {
! 870: timeout_del(&sc->sc_intr_to);
! 871: sc->sc_flags |= MTF_ALIVE;
! 872: }
! 873: } else {
! 874: i = hpibrecv(sc->sc_hpibno, sc->sc_slave, MTT_BCNT, cmdbuf, 2);
! 875: if (i != 2) {
! 876: log(LOG_ERR, "%s intr: can't get xfer length\n",
! 877: sc->sc_dev.dv_xname);
! 878: goto error;
! 879: }
! 880: i = (int) *((u_short *) cmdbuf);
! 881: if (i <= bp->b_bcount) {
! 882: if (i == 0)
! 883: sc->sc_flags |= MTF_HITEOF;
! 884: bp->b_resid = bp->b_bcount - i;
! 885: dlog(LOG_DEBUG, "%s intr: bcount %ld, resid %d",
! 886: sc->sc_dev.dv_xname, bp->b_bcount, bp->b_resid);
! 887: } else {
! 888: printf("%s: record (%d) larger than wanted (%ld)\n",
! 889: sc->sc_dev.dv_xname, i, bp->b_bcount);
! 890: error:
! 891: sc->sc_flags &= ~MTF_IO;
! 892: bp->b_error = EIO;
! 893: bp->b_flags |= B_ERROR;
! 894: }
! 895: }
! 896: /*
! 897: * The operation is completely done.
! 898: * Let the drive know with an END command.
! 899: */
! 900: cmdbuf[0] = MTE_COMPLETE | MTE_IDLE;
! 901: (void) hpibsend(sc->sc_hpibno, sc->sc_slave, MTL_ECMD, cmdbuf, 1);
! 902: bp->b_flags &= ~B_CMD;
! 903: biodone(bp);
! 904: if ((dp = bp->b_actf))
! 905: dp->b_actb = bp->b_actb;
! 906: else
! 907: sc->sc_tab.b_actb = bp->b_actb;
! 908: *bp->b_actb = dp;
! 909: hpibfree(sc->sc_dev.dv_parent, &sc->sc_hq);
! 910: #if 0
! 911: if (bp /*sc->sc_tab.b_actf*/ == NULL)
! 912: #else
! 913: if (sc->sc_tab.b_actf == NULL)
! 914: #endif
! 915: sc->sc_tab.b_active = 0;
! 916: else
! 917: mtustart(sc);
! 918: }
! 919:
! 920: int
! 921: mtread(dev, uio, flags)
! 922: dev_t dev;
! 923: struct uio *uio;
! 924: int flags;
! 925: {
! 926: struct mt_softc *sc = mt_cd.cd_devs[UNIT(dev)];
! 927:
! 928: return(physio(mtstrategy, &sc->sc_bufstore,
! 929: dev, B_READ, minphys, uio));
! 930: }
! 931:
! 932: int
! 933: mtwrite(dev, uio, flags)
! 934: dev_t dev;
! 935: struct uio *uio;
! 936: int flags;
! 937: {
! 938: struct mt_softc *sc = mt_cd.cd_devs[UNIT(dev)];
! 939:
! 940: return(physio(mtstrategy, &sc->sc_bufstore,
! 941: dev, B_WRITE, minphys, uio));
! 942: }
! 943:
! 944: int
! 945: mtioctl(dev, cmd, data, flag, p)
! 946: dev_t dev;
! 947: u_long cmd;
! 948: caddr_t data;
! 949: int flag;
! 950: struct proc *p;
! 951: {
! 952: struct mtop *op;
! 953: int cnt;
! 954:
! 955: switch (cmd) {
! 956: case MTIOCTOP:
! 957: op = (struct mtop *)data;
! 958: switch(op->mt_op) {
! 959: case MTWEOF:
! 960: case MTFSF:
! 961: case MTBSR:
! 962: case MTBSF:
! 963: case MTFSR:
! 964: cnt = op->mt_count;
! 965: break;
! 966:
! 967: case MTOFFL:
! 968: case MTREW:
! 969: case MTNOP:
! 970: cnt = 0;
! 971: break;
! 972:
! 973: default:
! 974: return (EINVAL);
! 975: }
! 976: return (mtcommand(dev, op->mt_op, cnt));
! 977:
! 978: case MTIOCGET:
! 979: break;
! 980:
! 981: default:
! 982: return (EINVAL);
! 983: }
! 984: return (0);
! 985: }
! 986:
! 987: /*ARGSUSED*/
! 988: int
! 989: mtdump(dev, blkno, va, size)
! 990: dev_t dev;
! 991: daddr64_t blkno;
! 992: caddr_t va;
! 993: size_t size;
! 994: {
! 995: return (ENODEV);
! 996: }