sys/arch/hp300/dev/ct.c

   1 /*      $NetBSD: ct.c,v 1.56 2008/06/17 19:46:23 he Exp $       */
   2
   3 /*-
   4  * Copyright (c) 1996, 1997 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Jason R. Thorpe.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 /*
  33  * Copyright (c) 1982, 1990, 1993
  34  *      The Regents of the University of California.  All rights reserved.
  35  *
  36  * Redistribution and use in source and binary forms, with or without
  37  * modification, are permitted provided that the following conditions
  38  * are met:
  39  * 1. Redistributions of source code must retain the above copyright
  40  *    notice, this list of conditions and the following disclaimer.
  41  * 2. Redistributions in binary form must reproduce the above copyright
  42  *    notice, this list of conditions and the following disclaimer in the
  43  *    documentation and/or other materials provided with the distribution.
  44  * 3. Neither the name of the University nor the names of its contributors
  45  *    may be used to endorse or promote products derived from this software
  46  *    without specific prior written permission.
  47  *
  48  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  49  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  50  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  51  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  52  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  53  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  54  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  55  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  56  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  57  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  58  * SUCH DAMAGE.
  59  *
  60  *      @(#)ct.c        8.2 (Berkeley) 1/12/94
  61  */
  62
  63 /*
  64  * CS80 cartridge tape driver (9144, 88140, 9145)
  65  *
  66  * Reminder:
  67  *      C_CC bit (character count option) when used in the CS/80 command
  68  *      'set options' will cause the tape not to stream.
  69  *
  70  * TODO:
  71  *      make filesystem compatible
  72  *      make block mode work according to mtio(4) spec. (if possible)
  73  *      merge with cs80 disk driver
  74  *      finish support of 9145
  75  */
  76
  77 #include <sys/cdefs.h>
  78 __KERNEL_RCSID(0, "$NetBSD: ct.c,v 1.56 2008/06/17 19:46:23 he Exp $");
  79
  80 #include <sys/param.h>
  81 #include <sys/systm.h>
  82 #include <sys/buf.h>
  83 #include <sys/bufq.h>
  84 #include <sys/conf.h>
  85 #include <sys/device.h>
  86 #include <sys/ioctl.h>
  87 #include <sys/mtio.h>
  88 #include <sys/proc.h>
  89 #include <sys/tprintf.h>
  90
  91 #include <hp300/dev/hpibvar.h>
  92
  93 #include <hp300/dev/ctreg.h>
  94
  95 #include "ioconf.h"
  96
  97 /* number of eof marks to remember */
  98 #define EOFS    128
  99
 100 struct  ct_softc {
 101         device_t sc_dev;
 102         int     sc_slave;               /* HP-IB slave ID */
 103         int     sc_punit;               /* physical unit */
 104         struct  ct_iocmd sc_ioc;
 105         struct  ct_rscmd sc_rsc;
 106         struct  ct_stat sc_stat;
 107         struct  ct_ssmcmd sc_ssmc;
 108         struct  ct_srcmd sc_src;
 109         struct  ct_soptcmd sc_soptc;
 110         struct  ct_ulcmd sc_ul;
 111         struct  ct_wfmcmd sc_wfm;
 112         struct  ct_clearcmd sc_clear;
 113         struct  bufq_state *sc_tab;
 114         int     sc_active;
 115         struct  buf *sc_bp;
 116         struct  buf sc_bufstore;        /* XXX */
 117         int     sc_blkno;
 118         int     sc_cmd;
 119         int     sc_resid;
 120         char    *sc_addr;
 121         int     sc_flags;
 122         short   sc_type;
 123         tpr_t   sc_tpr;
 124         struct  hpibqueue sc_hq;        /* entry on hpib job queue */
 125         int     sc_eofp;
 126         int     sc_eofs[EOFS];
 127 };
 128
 129 /* flags */
 130 #define CTF_OPEN        0x01
 131 #define CTF_ALIVE       0x02
 132 #define CTF_WRT         0x04
 133 #define CTF_CMD         0x08
 134 #define CTF_IO          0x10
 135 #define CTF_BEOF        0x20
 136 #define CTF_AEOF        0x40
 137 #define CTF_EOT         0x80
 138 #define CTF_STATWAIT    0x100
 139 #define CTF_CANSTREAM   0x200
 140 #define CTF_WRTTN       0x400
 141
 142 static int      ctmatch(device_t, cfdata_t, void *);
 143 static void     ctattach(device_t, device_t, void *);
 144
 145 CFATTACH_DECL_NEW(ct, sizeof(struct ct_softc),
 146     ctmatch, ctattach, NULL, NULL);
 147
 148 static dev_type_open(ctopen);
 149 static dev_type_close(ctclose);
 150 static dev_type_read(ctread);
 151 static dev_type_write(ctwrite);
 152 static dev_type_ioctl(ctioctl);
 153 static dev_type_strategy(ctstrategy);
 154
 155 const struct bdevsw ct_bdevsw = {
 156         ctopen, ctclose, ctstrategy, ctioctl, nodump, nosize, D_TAPE
 157 };
 158
 159 const struct cdevsw ct_cdevsw = {
 160         ctopen, ctclose, ctread, ctwrite, ctioctl,
 161         nostop, notty, nopoll, nommap, nokqfilter, D_TAPE
 162 };
 163
 164 static int      ctident(device_t, struct ct_softc *,
 165                     struct hpibbus_attach_args *);
 166
 167 static void     ctreset(struct ct_softc *);
 168 static void     ctaddeof(struct ct_softc *);
 169 static void     ctustart(struct ct_softc *);
 170 static void     cteof(struct ct_softc *, struct buf *);
 171 static void     ctdone(struct ct_softc *, struct buf *);
 172
 173 static void     ctstart(void *);
 174 static void     ctgo(void *);
 175 static void     ctintr(void *);
 176
 177 static void     ctcommand(dev_t, int, int);
 178
 179 static const struct ctinfo {
 180         short   hwid;
 181         short   punit;
 182         const char *desc;
 183 } ctinfo[] = {
 184         { CT7946ID,     1,      "7946A" },
 185         { CT7912PID,    1,      "7912P" },
 186         { CT7914PID,    1,      "7914P" },
 187         { CT9144ID,     0,      "9144"  },
 188         { CT9145ID,     0,      "9145"  },
 189         { CT35401ID,    0,      "35401A"},
 190 };
 191 static const int nctinfo = __arraycount(ctinfo);
 192
 193 #define CT_NOREW        4
 194 #define CT_STREAM       8
 195 #define UNIT(x)         (minor(x) & 3)
 196 #define ctpunit(x)      ((x) & 7)
 197
 198 #ifdef DEBUG
 199 int ctdebug = 0;
 200 #define CDB_FILES       0x01
 201 #define CT_BSF          0x02
 202 #endif
 203
 204 static int
 205 ctmatch(device_t parent, cfdata_t cf, void *aux)
 206 {
 207         struct hpibbus_attach_args *ha = aux;
 208
 209         return ctident(parent, NULL, ha);
 210 }
 211
 212 static void
 213 ctattach(device_t parent, device_t self, void *aux)
 214 {
 215         struct ct_softc *sc = device_private(self);
 216         struct hpibbus_attach_args *ha = aux;
 217
 218         sc->sc_dev = self;
 219         if (ctident(parent, sc, ha) == 0) {
 220                 aprint_error(": didn't respond to describe command!\n");
 221                 return;
 222         }
 223
 224         sc->sc_slave = ha->ha_slave;
 225         sc->sc_punit = ha->ha_punit;
 226
 227         bufq_alloc(&sc->sc_tab, "fcfs", 0);
 228
 229         /* Initialize hpib job queue entry. */
 230         sc->sc_hq.hq_softc = sc;
 231         sc->sc_hq.hq_slave = sc->sc_slave;
 232         sc->sc_hq.hq_start = ctstart;
 233         sc->sc_hq.hq_go = ctgo;
 234         sc->sc_hq.hq_intr = ctintr;
 235
 236         ctreset(sc);
 237         sc->sc_flags |= CTF_ALIVE;
 238 }
 239
 240 static int
 241 ctident(device_t parent, struct ct_softc *sc, struct hpibbus_attach_args *ha)
 242 {
 243         struct ct_describe desc;
 244         u_char stat, cmd[3];
 245         char name[7];
 246         int i, id, n, type, canstream;
 247
 248         type = canstream = 0;
 249
 250         /* Verify that we have a CS80 device. */
 251         if ((ha->ha_id & 0x200) == 0)
 252                 return 0;
 253
 254         /* Is it one of the tapes we support? */
 255         for (id = 0; id < nctinfo; id++)
 256                 if (ha->ha_id == ctinfo[id].hwid)
 257                         break;
 258         if (id == nctinfo)
 259                 return 0;
 260
 261         ha->ha_punit = ctinfo[id].punit;
 262
 263         /*
 264          * So far, so good.  Get drive parameters.  Note command
 265          * is always issued to unit 0.
 266          */
 267         cmd[0] = C_SUNIT(0);
 268         cmd[1] = C_SVOL(0);
 269         cmd[2] = C_DESC;
 270         hpibsend(device_unit(parent), ha->ha_slave, C_CMD, cmd, sizeof(cmd));
 271         hpibrecv(device_unit(parent), ha->ha_slave, C_EXEC, &desc, 37);
 272         hpibrecv(device_unit(parent), ha->ha_slave, C_QSTAT, &stat,
 273                  sizeof(stat));
 274
 275         memset(name, 0, sizeof(name));
 276         if (stat == 0) {
 277                 n = desc.d_name;
 278                 for (i = 5; i >= 0; i--) {
 279                         name[i] = (n & 0xf) + '0';
 280                         n >>= 4;
 281                 }
 282         }
 283
 284         switch (ha->ha_id) {
 285         case CT7946ID:
 286                 if (memcmp(name, "079450", 6) == 0)
 287                         return 0;               /* not really a 7946 */
 288                 /* fall into... */
 289         case CT9144ID:
 290         case CT9145ID:
 291         case CT35401ID:
 292                 type = CT9144;
 293                 canstream = 1;
 294                 break;
 295
 296         case CT7912PID:
 297         case CT7914PID:
 298                 type = CT88140;
 299                 break;
 300         }
 301
 302         if (sc != NULL) {
 303                 sc->sc_type = type;
 304                 sc->sc_flags = canstream ? CTF_CANSTREAM : 0;
 305                 aprint_normal(": %s %stape\n", ctinfo[id].desc,
 306                     canstream ? "streaming " : "");
 307         }
 308
 309         return 1;
 310 }
 311
 312 static void
 313 ctreset(struct ct_softc *sc)
 314 {
 315         int ctlr, slave;
 316         uint8_t stat;
 317
 318         ctlr = device_unit(device_parent(sc->sc_dev));
 319         slave = sc->sc_slave;
 320
 321         sc->sc_clear.unit = C_SUNIT(sc->sc_punit);
 322         sc->sc_clear.cmd = C_CLEAR;
 323         hpibsend(ctlr, slave, C_TCMD, &sc->sc_clear, sizeof(sc->sc_clear));
 324         hpibswait(ctlr, slave);
 325         hpibrecv(ctlr, slave, C_QSTAT, &stat, sizeof(stat));
 326
 327         sc->sc_src.unit = C_SUNIT(CTCTLR);
 328         sc->sc_src.nop = C_NOP;
 329         sc->sc_src.cmd = C_SREL;
 330         sc->sc_src.param = C_REL;
 331         hpibsend(ctlr, slave, C_CMD, &sc->sc_src, sizeof(sc->sc_src));
 332         hpibswait(ctlr, slave);
 333         hpibrecv(ctlr, slave, C_QSTAT, &stat, sizeof(stat));
 334
 335         sc->sc_ssmc.unit = C_SUNIT(sc->sc_punit);
 336         sc->sc_ssmc.cmd = C_SSM;
 337         sc->sc_ssmc.refm = REF_MASK;
 338         sc->sc_ssmc.fefm = FEF_MASK;
 339         sc->sc_ssmc.aefm = AEF_MASK;
 340         sc->sc_ssmc.iefm = IEF_MASK;
 341         hpibsend(ctlr, slave, C_CMD, &sc->sc_ssmc, sizeof(sc->sc_ssmc));
 342         hpibswait(ctlr, slave);
 343         hpibrecv(ctlr, slave, C_QSTAT, &stat, sizeof(stat));
 344
 345         sc->sc_soptc.unit = C_SUNIT(sc->sc_punit);
 346         sc->sc_soptc.nop = C_NOP;
 347         sc->sc_soptc.cmd = C_SOPT;
 348         sc->sc_soptc.opt = C_SPAR;
 349         hpibsend(ctlr, slave, C_CMD, &sc->sc_soptc, sizeof(sc->sc_soptc));
 350         hpibswait(ctlr, slave);
 351         hpibrecv(ctlr, slave, C_QSTAT, &stat, sizeof(stat));
 352 }
 353
 354 /*ARGSUSED*/
 355 static int
 356 ctopen(dev_t dev, int flag, int type, struct lwp *l)
 357 {
 358         struct ct_softc *sc;
 359         uint8_t stat;
 360         int cc, ctlr, slave;
 361
 362         sc = device_lookup_private(&ct_cd, UNIT(dev));
 363         if (sc == NULL)
 364                 return ENXIO;
 365
 366         if ((sc->sc_flags & CTF_ALIVE) == 0)
 367                 return ENXIO;
 368
 369         if (sc->sc_flags & CTF_OPEN)
 370                 return EBUSY;
 371
 372         ctlr = device_unit(device_parent(sc->sc_dev));
 373         slave = sc->sc_slave;
 374
 375         sc->sc_soptc.unit = C_SUNIT(sc->sc_punit);
 376         sc->sc_soptc.nop = C_NOP;
 377         sc->sc_soptc.cmd = C_SOPT;
 378         if ((dev & CT_STREAM) && (sc->sc_flags & CTF_CANSTREAM))
 379                 sc->sc_soptc.opt = C_SPAR | C_IMRPT;
 380         else
 381                 sc->sc_soptc.opt = C_SPAR;
 382
 383         /*
 384          * Check the return of hpibsend() and hpibswait().
 385          * Drive could be loading/unloading a tape. If not checked,
 386          * driver hangs.
 387          */
 388         cc = hpibsend(ctlr, slave, C_CMD, &sc->sc_soptc, sizeof(sc->sc_soptc));
 389         if (cc != sizeof(sc->sc_soptc))
 390                 return EBUSY;
 391
 392         hpibswait(ctlr, slave);
 393         cc = hpibrecv(ctlr, slave, C_QSTAT, &stat, sizeof(stat));
 394         if (cc != sizeof(stat))
 395                 return EBUSY;
 396
 397         sc->sc_tpr = tprintf_open(l->l_proc);
 398         sc->sc_flags |= CTF_OPEN;
 399         return 0;
 400 }
 401
 402 /*ARGSUSED*/
 403 static int
 404 ctclose(dev_t dev, int flag, int fmt, struct lwp *l)
 405 {
 406         struct ct_softc *sc = device_lookup_private(&ct_cd,UNIT(dev));
 407
 408         if ((sc->sc_flags & (CTF_WRT|CTF_WRTTN)) == (CTF_WRT|CTF_WRTTN) &&
 409             (sc->sc_flags & CTF_EOT) == 0 ) { /* XXX return error if EOT ?? */
 410                 ctcommand(dev, MTWEOF, 2);
 411                 ctcommand(dev, MTBSR, 1);
 412                 if (sc->sc_eofp == EOFS - 1)
 413                         sc->sc_eofs[EOFS - 1]--;
 414                 else
 415                         sc->sc_eofp--;
 416 #ifdef DEBUG
 417                 if(ctdebug & CT_BSF)
 418                         printf("%s: ctclose backup eofs prt %d blk %d\n",
 419                             device_xname(sc->sc_dev), sc->sc_eofp,
 420                             sc->sc_eofs[sc->sc_eofp]);
 421 #endif
 422         }
 423         if ((minor(dev) & CT_NOREW) == 0)
 424                 ctcommand(dev, MTREW, 1);
 425         sc->sc_flags &= ~(CTF_OPEN | CTF_WRT | CTF_WRTTN);
 426         tprintf_close(sc->sc_tpr);
 427 #ifdef DEBUG
 428         if (ctdebug & CDB_FILES)
 429                 printf("ctclose: flags %x\n", sc->sc_flags);
 430 #endif
 431         return 0;       /* XXX */
 432 }
 433
 434 static void
 435 ctcommand(dev_t dev, int cmd, int cnt)
 436 {
 437         struct ct_softc *sc = device_lookup_private(&ct_cd,UNIT(dev));
 438         struct buf *bp = &sc->sc_bufstore;
 439         struct buf *nbp = 0;
 440
 441         if (cmd == MTBSF && sc->sc_eofp == EOFS - 1) {
 442                 cnt = sc->sc_eofs[EOFS - 1] - cnt;
 443                 ctcommand(dev, MTREW, 1);
 444                 ctcommand(dev, MTFSF, cnt);
 445                 cnt = 2;
 446                 cmd = MTBSR;
 447         }
 448
 449         if (cmd == MTBSF && sc->sc_eofp - cnt < 0) {
 450                 cnt = 1;
 451                 cmd = MTREW;
 452         }
 453
 454         sc->sc_flags |= CTF_CMD;
 455         sc->sc_bp = bp;
 456         sc->sc_cmd = cmd;
 457         bp->b_dev = dev;
 458         if (cmd == MTFSF) {
 459                 nbp = (struct buf *)geteblk(MAXBSIZE);
 460                 bp->b_data = nbp->b_data;
 461                 bp->b_bcount = MAXBSIZE;
 462         }
 463
 464         while (cnt-- > 0) {
 465                 bp->b_cflags = BC_BUSY;
 466                 if (cmd == MTBSF) {
 467                         sc->sc_blkno = sc->sc_eofs[sc->sc_eofp];
 468                         sc->sc_eofp--;
 469 #ifdef DEBUG
 470                         if (ctdebug & CT_BSF)
 471                                 printf("%s: backup eof pos %d blk %d\n",
 472                                     device_xname(sc->sc_dev), sc->sc_eofp,
 473                                     sc->sc_eofs[sc->sc_eofp]);
 474 #endif
 475                 }
 476                 ctstrategy(bp);
 477                 biowait(bp);
 478         }
 479         bp->b_flags = 0;
 480         sc->sc_flags &= ~CTF_CMD;
 481         if (nbp)
 482                 brelse(nbp, 0);
 483 }
 484
 485 static void
 486 ctstrategy(struct buf *bp)
 487 {
 488         int s;
 489         struct ct_softc *sc;
 490
 491         sc = device_lookup_private(&ct_cd, UNIT(bp->b_dev));
 492
 493         s = splbio();
 494         bufq_put(sc->sc_tab, bp);
 495         if (sc->sc_active == 0) {
 496                 sc->sc_active = 1;
 497                 ctustart(sc);
 498         }
 499         splx(s);
 500 }
 501
 502 static void
 503 ctustart(struct ct_softc *sc)
 504 {
 505         struct buf *bp;
 506
 507         bp = bufq_peek(sc->sc_tab);
 508         sc->sc_addr = bp->b_data;
 509         sc->sc_resid = bp->b_bcount;
 510         if (hpibreq(device_parent(sc->sc_dev), &sc->sc_hq))
 511                 ctstart(sc);
 512 }
 513
 514 static void
 515 ctstart(void *arg)
 516 {
 517         struct ct_softc *sc = arg;
 518         struct buf *bp;
 519         int i, ctlr, slave;
 520
 521         ctlr = device_unit(device_parent(sc->sc_dev));
 522         slave = sc->sc_slave;
 523
 524         bp = bufq_peek(sc->sc_tab);
 525         if ((sc->sc_flags & CTF_CMD) && sc->sc_bp == bp) {
 526                 switch(sc->sc_cmd) {
 527                 case MTFSF:
 528                         bp->b_flags |= B_READ;
 529                         goto mustio;
 530
 531                 case MTBSF:
 532                         goto gotaddr;
 533
 534                 case MTOFFL:
 535                         sc->sc_blkno = 0;
 536                         sc->sc_ul.unit = C_SUNIT(sc->sc_punit);
 537                         sc->sc_ul.cmd = C_UNLOAD;
 538                         hpibsend(ctlr, slave, C_CMD, &sc->sc_ul,
 539                             sizeof(sc->sc_ul));
 540                         break;
 541
 542                 case MTWEOF:
 543                         sc->sc_blkno++;
 544                         sc->sc_flags |= CTF_WRT;
 545                         sc->sc_wfm.unit = C_SUNIT(sc->sc_punit);
 546                         sc->sc_wfm.cmd = C_WFM;
 547                         hpibsend(ctlr, slave, C_CMD, &sc->sc_wfm,
 548                             sizeof(sc->sc_wfm));
 549                         ctaddeof(sc);
 550                         break;
 551
 552                 case MTBSR:
 553                         sc->sc_blkno--;
 554                         goto gotaddr;
 555
 556                 case MTFSR:
 557                         sc->sc_blkno++;
 558                         goto gotaddr;
 559
 560                 case MTREW:
 561                         sc->sc_blkno = 0;
 562 #ifdef DEBUG
 563                         if(ctdebug & CT_BSF)
 564                                 printf("%s: clearing eofs\n",
 565                                     device_xname(sc->sc_dev));
 566 #endif
 567                         for (i=0; i<EOFS; i++)
 568                                 sc->sc_eofs[i] = 0;
 569                         sc->sc_eofp = 0;
 570
 571 gotaddr:
 572                         sc->sc_ioc.saddr = C_SADDR;
 573                         sc->sc_ioc.addr0 = 0;
 574                         sc->sc_ioc.addr = sc->sc_blkno;
 575                         sc->sc_ioc.unit = C_SUNIT(sc->sc_punit);
 576                         sc->sc_ioc.nop2 = C_NOP;
 577                         sc->sc_ioc.slen = C_SLEN;
 578                         sc->sc_ioc.len = 0;
 579                         sc->sc_ioc.nop3 = C_NOP;
 580                         sc->sc_ioc.cmd = C_READ;
 581                         hpibsend(ctlr, slave, C_CMD, &sc->sc_ioc,
 582                             sizeof(sc->sc_ioc));
 583                         break;
 584                 }
 585         } else {
 586 mustio:
 587                 if ((bp->b_flags & B_READ) &&
 588                     sc->sc_flags & (CTF_BEOF|CTF_EOT)) {
 589 #ifdef DEBUG
 590                         if (ctdebug & CDB_FILES)
 591                                 printf("ctstart: before flags %x\n",
 592                                     sc->sc_flags);
 593 #endif
 594                         if (sc->sc_flags & CTF_BEOF) {
 595                                 sc->sc_flags &= ~CTF_BEOF;
 596                                 sc->sc_flags |= CTF_AEOF;
 597 #ifdef DEBUG
 598                                 if (ctdebug & CDB_FILES)
 599                                         printf("ctstart: after flags %x\n",
 600                                             sc->sc_flags);
 601 #endif
 602                         }
 603                         bp->b_resid = bp->b_bcount;
 604                         ctdone(sc, bp);
 605                         return;
 606                 }
 607                 sc->sc_flags |= CTF_IO;
 608                 sc->sc_ioc.unit = C_SUNIT(sc->sc_punit);
 609                 sc->sc_ioc.saddr = C_SADDR;
 610                 sc->sc_ioc.addr0 = 0;
 611                 sc->sc_ioc.addr = sc->sc_blkno;
 612                 sc->sc_ioc.nop2 = C_NOP;
 613                 sc->sc_ioc.slen = C_SLEN;
 614                 sc->sc_ioc.len = sc->sc_resid;
 615                 sc->sc_ioc.nop3 = C_NOP;
 616                 if (bp->b_flags & B_READ)
 617                         sc->sc_ioc.cmd = C_READ;
 618                 else {
 619                         sc->sc_ioc.cmd = C_WRITE;
 620                         sc->sc_flags |= (CTF_WRT | CTF_WRTTN);
 621                 }
 622                 hpibsend(ctlr, slave, C_CMD, &sc->sc_ioc, sizeof(sc->sc_ioc));
 623         }
 624         hpibawait(ctlr);
 625 }
 626
 627 static void
 628 ctgo(void *arg)
 629 {
 630         struct ct_softc *sc = arg;
 631         struct buf *bp;
 632         int rw;
 633
 634         bp = bufq_peek(sc->sc_tab);
 635         rw = bp->b_flags & B_READ;
 636         hpibgo(device_unit(device_parent(sc->sc_dev)), sc->sc_slave, C_EXEC,
 637             sc->sc_addr, sc->sc_resid, rw, rw != 0);
 638 }
 639
 640 /*
 641  * Hideous grue to handle EOF/EOT (mostly for reads)
 642  */
 643 static void
 644 cteof(struct ct_softc *sc, struct buf *bp)
 645 {
 646         long blks;
 647
 648         /*
 649          * EOT on a write is an error.
 650          */
 651         if ((bp->b_flags & B_READ) == 0) {
 652                 bp->b_resid = bp->b_bcount;
 653                 bp->b_error = ENOSPC;
 654                 sc->sc_flags |= CTF_EOT;
 655                 return;
 656         }
 657         /*
 658          * Use returned block position to determine how many blocks
 659          * we really read and update b_resid.
 660          */
 661         blks = sc->sc_stat.c_blk - sc->sc_blkno - 1;
 662 #ifdef DEBUG
 663         if (ctdebug & CDB_FILES)
 664                 printf("cteof: bc %d oblk %d nblk %ld read %ld, resid %ld\n",
 665                        bp->b_bcount, sc->sc_blkno, sc->sc_stat.c_blk,
 666                        blks, bp->b_bcount - CTKTOB(blks));
 667 #endif
 668         if (blks == -1) { /* 9145 on EOF does not change sc_stat.c_blk */
 669                 blks = 0;
 670                 sc->sc_blkno++;
 671         }
 672         else {
 673                 sc->sc_blkno = sc->sc_stat.c_blk;
 674         }
 675         bp->b_resid = bp->b_bcount - CTKTOB(blks);
 676         /*
 677          * If we are at physical EOV or were after an EOF,
 678          * we are now at logical EOT.
 679          */
 680         if ((sc->sc_stat.c_aef & AEF_EOV) ||
 681             (sc->sc_flags & CTF_AEOF)) {
 682                 sc->sc_flags |= CTF_EOT;
 683                 sc->sc_flags &= ~(CTF_AEOF|CTF_BEOF);
 684         }
 685         /*
 686          * If we were before an EOF or we have just completed a FSF,
 687          * we are now after EOF.
 688          */
 689         else if ((sc->sc_flags & CTF_BEOF) ||
 690                  ((sc->sc_flags & CTF_CMD) && sc->sc_cmd == MTFSF)) {
 691                 sc->sc_flags |= CTF_AEOF;
 692                 sc->sc_flags &= ~CTF_BEOF;
 693         }
 694         /*
 695          * Otherwise if we read something we are now before EOF
 696          * (and no longer after EOF).
 697          */
 698         else if (blks) {
 699                 sc->sc_flags |= CTF_BEOF;
 700                 sc->sc_flags &= ~CTF_AEOF;
 701         }
 702         /*
 703          * Finally, if we didn't read anything we just passed an EOF
 704          */
 705         else
 706                 sc->sc_flags |= CTF_AEOF;
 707 #ifdef DEBUG
 708         if (ctdebug & CDB_FILES)
 709                 printf("cteof: leaving flags %x\n", sc->sc_flags);
 710 #endif
 711 }
 712
 713 /* ARGSUSED */
 714 static void
 715 ctintr(void *arg)
 716 {
 717         struct ct_softc *sc = arg;
 718         struct buf *bp;
 719         uint8_t stat;
 720         int ctlr, slave, unit;
 721
 722         ctlr = device_unit(device_parent(sc->sc_dev));
 723         slave = sc->sc_slave;
 724         unit = device_unit(sc->sc_dev);
 725
 726         bp = bufq_peek(sc->sc_tab);
 727         if (bp == NULL) {
 728                 printf("%s: bp == NULL\n", device_xname(sc->sc_dev));
 729                 return;
 730         }
 731         if (sc->sc_flags & CTF_IO) {
 732                 sc->sc_flags &= ~CTF_IO;
 733                 if (hpibustart(ctlr))
 734                         ctgo(sc);
 735                 return;
 736         }
 737         if ((sc->sc_flags & CTF_STATWAIT) == 0) {
 738                 if (hpibpptest(ctlr, slave) == 0) {
 739                         sc->sc_flags |= CTF_STATWAIT;
 740                         hpibawait(ctlr);
 741                         return;
 742                 }
 743         } else
 744                 sc->sc_flags &= ~CTF_STATWAIT;
 745         hpibrecv(ctlr, slave, C_QSTAT, &stat, 1);
 746 #ifdef DEBUG
 747         if (ctdebug & CDB_FILES)
 748                 printf("ctintr: before flags %x\n", sc->sc_flags);
 749 #endif
 750         if (stat) {
 751                 sc->sc_rsc.unit = C_SUNIT(sc->sc_punit);
 752                 sc->sc_rsc.cmd = C_STATUS;
 753                 hpibsend(ctlr, slave, C_CMD, &sc->sc_rsc, sizeof(sc->sc_rsc));
 754                 hpibrecv(ctlr, slave, C_EXEC, &sc->sc_stat,
 755                     sizeof(sc->sc_stat));
 756                 hpibrecv(ctlr, slave, C_QSTAT, &stat, 1);
 757 #ifdef DEBUG
 758                 if (ctdebug & CDB_FILES)
 759                         printf("ctintr: return stat 0x%x, A%x F%x blk %ld\n",
 760                                stat, sc->sc_stat.c_aef,
 761                                sc->sc_stat.c_fef, sc->sc_stat.c_blk);
 762 #endif
 763                 if (stat == 0) {
 764                         if (sc->sc_stat.c_aef & (AEF_EOF | AEF_EOV)) {
 765                                 cteof(sc, bp);
 766                                 ctaddeof(sc);
 767                                 goto done;
 768                         }
 769                         if (sc->sc_stat.c_fef & FEF_PF) {
 770                                 ctreset(sc);
 771                                 ctstart(sc);
 772                                 return;
 773                         }
 774                         if (sc->sc_stat.c_fef & FEF_REXMT) {
 775                                 ctstart(sc);
 776                                 return;
 777                         }
 778                         if (sc->sc_stat.c_aef & 0x5800) {
 779                                 if (sc->sc_stat.c_aef & 0x4000)
 780                                         tprintf(sc->sc_tpr,
 781                                             "%s: uninitialized media\n",
 782                                             device_xname(sc->sc_dev));
 783                                 if (sc->sc_stat.c_aef & 0x1000)
 784                                         tprintf(sc->sc_tpr,
 785                                             "%s: not ready\n",
 786                                             device_xname(sc->sc_dev));
 787                                 if (sc->sc_stat.c_aef & 0x0800)
 788                                         tprintf(sc->sc_tpr,
 789                                             "%s: write protect\n",
 790                                             device_xname(sc->sc_dev));
 791                         } else {
 792                                 printf("%s err: v%d u%d ru%d bn%ld, ",
 793                                     device_xname(sc->sc_dev),
 794                                        (sc->sc_stat.c_vu >> 4) & 0xF,
 795                                        sc->sc_stat.c_vu & 0xF,
 796                                        sc->sc_stat.c_pend,
 797                                        sc->sc_stat.c_blk);
 798                                 printf("R0x%x F0x%x A0x%x I0x%x\n",
 799                                        sc->sc_stat.c_ref,
 800                                        sc->sc_stat.c_fef,
 801                                        sc->sc_stat.c_aef,
 802                                        sc->sc_stat.c_ief);
 803                         }
 804                 } else
 805                         printf("%s: request status failed\n",
 806                             device_xname(sc->sc_dev));
 807                 bp->b_error = EIO;
 808                 goto done;
 809         } else
 810                 bp->b_resid = 0;
 811         if (sc->sc_flags & CTF_CMD) {
 812                 switch (sc->sc_cmd) {
 813                 case MTFSF:
 814                         sc->sc_flags &= ~(CTF_BEOF|CTF_AEOF);
 815                         sc->sc_blkno += CTBTOK(sc->sc_resid);
 816                         ctstart(sc);
 817                         return;
 818                 case MTBSF:
 819                         sc->sc_flags &= ~(CTF_AEOF|CTF_BEOF|CTF_EOT);
 820                         break;
 821                 case MTBSR:
 822                         sc->sc_flags &= ~CTF_BEOF;
 823                         if (sc->sc_flags & CTF_EOT) {
 824                                 sc->sc_flags |= CTF_AEOF;
 825                                 sc->sc_flags &= ~CTF_EOT;
 826                         } else if (sc->sc_flags & CTF_AEOF) {
 827                                 sc->sc_flags |= CTF_BEOF;
 828                                 sc->sc_flags &= ~CTF_AEOF;
 829                         }
 830                         break;
 831                 case MTWEOF:
 832                         sc->sc_flags &= ~CTF_BEOF;
 833                         if (sc->sc_flags & (CTF_AEOF|CTF_EOT)) {
 834                                 sc->sc_flags |= CTF_EOT;
 835                                 sc->sc_flags &= ~CTF_AEOF;
 836                         } else
 837                                 sc->sc_flags |= CTF_AEOF;
 838                         break;
 839                 case MTREW:
 840                 case MTOFFL:
 841                         sc->sc_flags &= ~(CTF_BEOF|CTF_AEOF|CTF_EOT);
 842                         break;
 843                 }
 844         } else {
 845                 sc->sc_flags &= ~CTF_AEOF;
 846                 sc->sc_blkno += CTBTOK(sc->sc_resid);
 847         }
 848 done:
 849 #ifdef DEBUG
 850         if (ctdebug & CDB_FILES)
 851                 printf("ctintr: after flags %x\n", sc->sc_flags);
 852 #endif
 853         ctdone(sc, bp);
 854 }
 855
 856 static void
 857 ctdone(struct ct_softc *sc, struct buf *bp)
 858 {
 859
 860         (void)bufq_get(sc->sc_tab);
 861         biodone(bp);
 862         hpibfree(device_parent(sc->sc_dev), &sc->sc_hq);
 863         if (bufq_peek(sc->sc_tab) == NULL) {
 864                 sc->sc_active = 0;
 865                 return;
 866         }
 867         ctustart(sc);
 868 }
 869
 870 static int
 871 ctread(dev_t dev, struct uio *uio, int flags)
 872 {
 873
 874         return physio(ctstrategy, NULL, dev, B_READ, minphys, uio);
 875 }
 876
 877 static int
 878 ctwrite(dev_t dev, struct uio *uio, int flags)
 879 {
 880
 881         /* XXX: check for hardware write-protect? */
 882         return physio(ctstrategy, NULL, dev, B_WRITE, minphys, uio);
 883 }
 884
 885 /*ARGSUSED*/
 886 static int
 887 ctioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l)
 888 {
 889         struct mtop *op;
 890         int cnt;
 891
 892         switch (cmd) {
 893
 894         case MTIOCTOP:
 895                 op = (struct mtop *)data;
 896                 switch(op->mt_op) {
 897
 898                 case MTWEOF:
 899                 case MTFSF:
 900                 case MTBSR:
 901                 case MTBSF:
 902                 case MTFSR:
 903                         cnt = op->mt_count;
 904                         break;
 905
 906                 case MTREW:
 907                 case MTOFFL:
 908                         cnt = 1;
 909                         break;
 910
 911                 default:
 912                         return EINVAL;
 913                 }
 914                 ctcommand(dev, op->mt_op, cnt);
 915                 break;
 916
 917         case MTIOCGET:
 918                 break;
 919
 920         default:
 921                 return EINVAL;
 922         }
 923         return 0;
 924 }
 925
 926 static void
 927 ctaddeof(struct ct_softc *sc)
 928 {
 929
 930         if (sc->sc_eofp == EOFS - 1)
 931                 sc->sc_eofs[EOFS - 1]++;
 932         else {
 933                 sc->sc_eofp++;
 934                 if (sc->sc_eofp == EOFS - 1)
 935                         sc->sc_eofs[EOFS - 1] = EOFS;
 936                 else
 937                         /* save blkno */
 938                         sc->sc_eofs[sc->sc_eofp] = sc->sc_blkno - 1;
 939         }
 940 #ifdef DEBUG
 941         if (ctdebug & CT_BSF)
 942                 printf("%s: add eof pos %d blk %d\n",
 943                        device_xname(sc->sc_dev), sc->sc_eofp,
 944                        sc->sc_eofs[sc->sc_eofp]);
 945 #endif
 946 }