1 /* $NetBSD: st.c,v 1.157 2002/09/06 13:18:43 gehenna Exp $ */ 2 /*- 3 * Copyright (c) 1998 The NetBSD Foundation, Inc. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to The NetBSD Foundation 7 * by Charles M. Hannum. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the NetBSD 20 * Foundation, Inc. and its contributors. 21 * 4. Neither the name of The NetBSD Foundation nor the names of its 22 * contributors may be used to endorse or promote products derived 23 * from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 26 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 /* 39 * Originally written by Julian Elischer (julian@tfs.com) 40 * for TRW Financial Systems for use under the MACH(2.5) operating system. 41 * 42 * TRW Financial Systems, in accordance with their agreement with Carnegie 43 * Mellon University, makes this software available to CMU to distribute 44 * or use in any manner that they see fit as long as this message is kept with 45 * the software. For this reason TFS also grants any other persons or 46 * organisations permission to use or modify this software. 47 * 48 * TFS supplies this software to be publicly redistributed 49 * on the understanding that TFS is not responsible for the correct 50 * functioning of this software in any circumstances. 51 * 52 * Ported to run under 386BSD by Julian Elischer (julian@tfs.com) Sept 1992 53 * major changes by Julian Elischer (julian@jules.dialix.oz.au) May 1993 54 * 55 * A lot of rewhacking done by mjacob (mjacob@nas.nasa.gov). 56 */ 57 58 #include <sys/cdefs.h> 59 __KERNEL_RCSID(0, "$NetBSD: st.c,v 1.157 2002/09/06 13:18:43 gehenna Exp $"); 60 61 #include "opt_scsi.h" 62 63 #include <sys/param.h> 64 #include <sys/systm.h> 65 #include <sys/fcntl.h> 66 #include <sys/errno.h> 67 #include <sys/ioctl.h> 68 #include <sys/malloc.h> 69 #include <sys/buf.h> 70 #include <sys/proc.h> 71 #include <sys/user.h> 72 #include <sys/mtio.h> 73 #include <sys/device.h> 74 #include <sys/conf.h> 75 #include <sys/kernel.h> 76 #include <sys/vnode.h> 77 78 #include <dev/scsipi/scsi_all.h> 79 #include <dev/scsipi/scsi_tape.h> 80 #include <dev/scsipi/stvar.h> 81 82 /* Defines for device specific stuff */ 83 #define DEF_FIXED_BSIZE 512 84 85 #define STMODE(z) ( minor(z) & 0x03) 86 #define STDSTY(z) ((minor(z) >> 2) & 0x03) 87 #define STUNIT(z) ((minor(z) >> 4) ) 88 #define STNMINOR 16 89 90 #define NORMAL_MODE 0 91 #define NOREW_MODE 1 92 #define EJECT_MODE 2 93 #define CTRL_MODE 3 94 95 #define FALSE 0 96 #define TRUE 1 97 98 #ifndef ST_MOUNT_DELAY 99 #define ST_MOUNT_DELAY 0 100 #endif 101 102 dev_type_open(stopen); 103 dev_type_close(stclose); 104 dev_type_read(stread); 105 dev_type_write(stwrite); 106 dev_type_ioctl(stioctl); 107 dev_type_strategy(ststrategy); 108 dev_type_dump(stdump); 109 110 const struct bdevsw st_bdevsw = { 111 stopen, stclose, ststrategy, stioctl, stdump, nosize, D_TAPE 112 }; 113 114 const struct cdevsw st_cdevsw = { 115 stopen, stclose, stread, stwrite, stioctl, 116 nostop, notty, nopoll, nommap, D_TAPE 117 }; 118 119 /* 120 * Define various devices that we know mis-behave in some way, 121 * and note how they are bad, so we can correct for them 122 */ 123 124 const struct st_quirk_inquiry_pattern st_quirk_patterns[] = { 125 {{T_SEQUENTIAL, T_REMOV, 126 " ", " ", " "}, {0, 0, { 127 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 128 {ST_Q_FORCE_BLKSIZE, 512, QIC_24}, /* minor 4-7 */ 129 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_1600}, /* minor 8-11 */ 130 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_6250} /* minor 12-15 */ 131 }}}, 132 {{T_SEQUENTIAL, T_REMOV, 133 "TANDBERG", " TDC 3600 ", ""}, {0, 12, { 134 {0, 0, 0}, /* minor 0-3 */ 135 {ST_Q_FORCE_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 136 {0, 0, QIC_150}, /* minor 8-11 */ 137 {0, 0, QIC_120} /* minor 12-15 */ 138 }}}, 139 {{T_SEQUENTIAL, T_REMOV, 140 "TANDBERG", " TDC 3800 ", ""}, {0, 0, { 141 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 142 {0, 0, QIC_525}, /* minor 4-7 */ 143 {0, 0, QIC_150}, /* minor 8-11 */ 144 {0, 0, QIC_120} /* minor 12-15 */ 145 }}}, 146 /* 147 * lacking a manual for the 4200, it's not clear what the 148 * specific density codes should be- the device is a 2.5GB 149 * capable QIC drive, those density codes aren't readily 150 * availabel. The 'default' will just have to do. 151 */ 152 {{T_SEQUENTIAL, T_REMOV, 153 "TANDBERG", " TDC 4200 ", ""}, {0, 0, { 154 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 155 {0, 0, QIC_525}, /* minor 4-7 */ 156 {0, 0, QIC_150}, /* minor 8-11 */ 157 {0, 0, QIC_120} /* minor 12-15 */ 158 }}}, 159 /* 160 * At least -005 and -007 need this. I'll assume they all do unless I 161 * hear otherwise. - mycroft, 31MAR1994 162 */ 163 {{T_SEQUENTIAL, T_REMOV, 164 "ARCHIVE ", "VIPER 2525 25462", ""}, {0, 0, { 165 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 166 {ST_Q_SENSE_HELP, 0, QIC_525}, /* minor 4-7 */ 167 {0, 0, QIC_150}, /* minor 8-11 */ 168 {0, 0, QIC_120} /* minor 12-15 */ 169 }}}, 170 /* 171 * One user reports that this works for his tape drive. It probably 172 * needs more work. - mycroft, 09APR1994 173 */ 174 {{T_SEQUENTIAL, T_REMOV, 175 "SANKYO ", "CP525 ", ""}, {0, 0, { 176 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 177 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 178 {0, 0, QIC_150}, /* minor 8-11 */ 179 {0, 0, QIC_120} /* minor 12-15 */ 180 }}}, 181 {{T_SEQUENTIAL, T_REMOV, 182 "ANRITSU ", "DMT780 ", ""}, {0, 0, { 183 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 184 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 185 {0, 0, QIC_150}, /* minor 8-11 */ 186 {0, 0, QIC_120} /* minor 12-15 */ 187 }}}, 188 {{T_SEQUENTIAL, T_REMOV, 189 "ARCHIVE ", "VIPER 150 21247", ""}, {ST_Q_ERASE_NOIMM, 12, { 190 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 191 {0, 0, QIC_150}, /* minor 4-7 */ 192 {0, 0, QIC_120}, /* minor 8-11 */ 193 {0, 0, QIC_24} /* minor 12-15 */ 194 }}}, 195 {{T_SEQUENTIAL, T_REMOV, 196 "ARCHIVE ", "VIPER 150 21531", ""}, {ST_Q_ERASE_NOIMM, 12, { 197 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 198 {0, 0, QIC_150}, /* minor 4-7 */ 199 {0, 0, QIC_120}, /* minor 8-11 */ 200 {0, 0, QIC_24} /* minor 12-15 */ 201 }}}, 202 {{T_SEQUENTIAL, T_REMOV, 203 "WANGTEK ", "5099ES SCSI", ""}, {0, 0, { 204 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 205 {0, 0, QIC_11}, /* minor 4-7 */ 206 {0, 0, QIC_24}, /* minor 8-11 */ 207 {0, 0, QIC_24} /* minor 12-15 */ 208 }}}, 209 {{T_SEQUENTIAL, T_REMOV, 210 "WANGTEK ", "5150ES SCSI", ""}, {0, 0, { 211 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 212 {0, 0, QIC_24}, /* minor 4-7 */ 213 {0, 0, QIC_120}, /* minor 8-11 */ 214 {0, 0, QIC_150} /* minor 12-15 */ 215 }}}, 216 {{T_SEQUENTIAL, T_REMOV, 217 "WANGTEK ", "5525ES SCSI REV7", ""}, {0, 0, { 218 {0, 0, 0}, /* minor 0-3 */ 219 {ST_Q_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 220 {0, 0, QIC_150}, /* minor 8-11 */ 221 {0, 0, QIC_120} /* minor 12-15 */ 222 }}}, 223 {{T_SEQUENTIAL, T_REMOV, 224 "WangDAT ", "Model 1300 ", ""}, {0, 0, { 225 {0, 0, 0}, /* minor 0-3 */ 226 {ST_Q_FORCE_BLKSIZE, 512, DDS}, /* minor 4-7 */ 227 {ST_Q_FORCE_BLKSIZE, 1024, DDS}, /* minor 8-11 */ 228 {ST_Q_FORCE_BLKSIZE, 0, DDS} /* minor 12-15 */ 229 }}}, 230 {{T_SEQUENTIAL, T_REMOV, 231 "EXABYTE ", "EXB-8200 ", "263H"}, {0, 5, { 232 {0, 0, 0}, /* minor 0-3 */ 233 {0, 0, 0}, /* minor 4-7 */ 234 {0, 0, 0}, /* minor 8-11 */ 235 {0, 0, 0} /* minor 12-15 */ 236 }}}, 237 {{T_SEQUENTIAL, T_REMOV, 238 "STK", "9490", ""}, 239 {ST_Q_FORCE_BLKSIZE, 0, { 240 {0, 0, 0}, /* minor 0-3 */ 241 {0, 0, 0}, /* minor 4-7 */ 242 {0, 0, 0}, /* minor 8-11 */ 243 {0, 0, 0} /* minor 12-15 */ 244 }}}, 245 {{T_SEQUENTIAL, T_REMOV, 246 "STK", "SD-3", ""}, 247 {ST_Q_FORCE_BLKSIZE, 0, { 248 {0, 0, 0}, /* minor 0-3 */ 249 {0, 0, 0}, /* minor 4-7 */ 250 {0, 0, 0}, /* minor 8-11 */ 251 {0, 0, 0} /* minor 12-15 */ 252 }}}, 253 {{T_SEQUENTIAL, T_REMOV, 254 "IBM", "03590", ""}, {ST_Q_IGNORE_LOADS, 0, { 255 {0, 0, 0}, /* minor 0-3 */ 256 {0, 0, 0}, /* minor 4-7 */ 257 {0, 0, 0}, /* minor 8-11 */ 258 {0, 0, 0} /* minor 12-15 */ 259 }}}, 260 {{T_SEQUENTIAL, T_REMOV, 261 "HP ", "T4000s ", ""}, {ST_Q_UNIMODAL, 0, { 262 {0, 0, QIC_3095}, /* minor 0-3 */ 263 {0, 0, QIC_3095}, /* minor 4-7 */ 264 {0, 0, QIC_3095}, /* minor 8-11 */ 265 {0, 0, QIC_3095}, /* minor 12-15 */ 266 }}}, 267 #if 0 268 {{T_SEQUENTIAL, T_REMOV, 269 "EXABYTE ", "EXB-8200 ", ""}, {0, 12, { 270 {0, 0, 0}, /* minor 0-3 */ 271 {0, 0, 0}, /* minor 4-7 */ 272 {0, 0, 0}, /* minor 8-11 */ 273 {0, 0, 0} /* minor 12-15 */ 274 }}}, 275 #endif 276 {{T_SEQUENTIAL, T_REMOV, 277 "TEAC ", "MT-2ST/N50 ", ""}, {ST_Q_IGNORE_LOADS, 0, { 278 {0, 0, 0}, /* minor 0-3 */ 279 {0, 0, 0}, /* minor 4-7 */ 280 {0, 0, 0}, /* minor 8-11 */ 281 {0, 0, 0} /* minor 12-15 */ 282 }}}, 283 {{T_SEQUENTIAL, T_REMOV, 284 "OnStream", "ADR50 Drive", ""}, {ST_Q_UNIMODAL, 0, { 285 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 286 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 4-7 */ 287 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 8-11 */ 288 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 12-15 */ 289 }}}, 290 {{T_SEQUENTIAL, T_REMOV, 291 "OnStream DI-30", "", "1.0"}, {ST_Q_NOFILEMARKS, 0, { 292 {0, 0, 0}, /* minor 0-3 */ 293 {0, 0, 0}, /* minor 4-7 */ 294 {0, 0, 0}, /* minor 8-11 */ 295 {0, 0, 0} /* minor 12-15 */ 296 }}}, 297 {{T_SEQUENTIAL, T_REMOV, 298 "NCR H621", "0-STD-03-46F880 ", ""}, {ST_Q_NOPREVENT, 0, { 299 {0, 0, 0}, /* minor 0-3 */ 300 {0, 0, 0}, /* minor 4-7 */ 301 {0, 0, 0}, /* minor 8-11 */ 302 {0, 0, 0} /* minor 12-15 */ 303 }}}, 304 }; 305 306 #define NOEJECT 0 307 #define EJECT 1 308 309 void st_identify_drive __P((struct st_softc *, 310 struct scsipi_inquiry_pattern *)); 311 void st_loadquirks __P((struct st_softc *)); 312 int st_mount_tape __P((dev_t, int)); 313 void st_unmount __P((struct st_softc *, boolean)); 314 int st_decide_mode __P((struct st_softc *, boolean)); 315 void ststart __P((struct scsipi_periph *)); 316 void stdone __P((struct scsipi_xfer *)); 317 int st_read __P((struct st_softc *, char *, int, int)); 318 int st_space __P((struct st_softc *, int, u_int, int)); 319 int st_write_filemarks __P((struct st_softc *, int, int)); 320 int st_check_eod __P((struct st_softc *, boolean, int *, int)); 321 int st_load __P((struct st_softc *, u_int, int)); 322 int st_rewind __P((struct st_softc *, u_int, int)); 323 int st_interpret_sense __P((struct scsipi_xfer *)); 324 int st_touch_tape __P((struct st_softc *)); 325 int st_erase __P((struct st_softc *, int full, int flags)); 326 int st_rdpos __P((struct st_softc *, int, u_int32_t *)); 327 int st_setpos __P((struct st_softc *, int, u_int32_t *)); 328 329 const struct scsipi_periphsw st_switch = { 330 st_interpret_sense, 331 ststart, 332 NULL, 333 stdone 334 }; 335 336 #if defined(ST_ENABLE_EARLYWARN) 337 #define ST_INIT_FLAGS ST_EARLYWARN 338 #else 339 #define ST_INIT_FLAGS 0 340 #endif 341 342 /* 343 * The routine called by the low level scsi routine when it discovers 344 * A device suitable for this driver 345 */ 346 void 347 stattach(parent, st, aux) 348 struct device *parent; 349 struct st_softc *st; 350 void *aux; 351 { 352 struct scsipibus_attach_args *sa = aux; 353 struct scsipi_periph *periph = sa->sa_periph; 354 355 SC_DEBUG(periph, SCSIPI_DB2, ("stattach: ")); 356 357 /* 358 * Store information needed to contact our base driver 359 */ 360 st->sc_periph = periph; 361 periph->periph_dev = &st->sc_dev; 362 periph->periph_switch = &st_switch; 363 364 /* 365 * Set initial flags 366 */ 367 368 st->flags = ST_INIT_FLAGS; 369 370 /* 371 * Set up the buf queue for this device 372 */ 373 bufq_alloc(&st->buf_queue, BUFQ_FCFS); 374 375 /* 376 * Check if the drive is a known criminal and take 377 * Any steps needed to bring it into line 378 */ 379 st_identify_drive(st, &sa->sa_inqbuf); 380 /* 381 * Use the subdriver to request information regarding the drive. 382 */ 383 printf("\n"); 384 printf("%s: %s", st->sc_dev.dv_xname, st->quirkdata ? "rogue, " : ""); 385 if (scsipi_test_unit_ready(periph, 386 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE) || 387 st->ops(st, ST_OPS_MODESENSE, 388 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE)) 389 printf("drive empty\n"); 390 else { 391 printf("density code %d, ", st->media_density); 392 if (st->media_blksize > 0) 393 printf("%d-byte", st->media_blksize); 394 else 395 printf("variable"); 396 printf(" blocks, write-%s\n", 397 (st->flags & ST_READONLY) ? "protected" : "enabled"); 398 } 399 400 #if NRND > 0 401 rnd_attach_source(&st->rnd_source, st->sc_dev.dv_xname, 402 RND_TYPE_TAPE, 0); 403 #endif 404 } 405 406 int 407 stactivate(self, act) 408 struct device *self; 409 enum devact act; 410 { 411 int rv = 0; 412 413 switch (act) { 414 case DVACT_ACTIVATE: 415 rv = EOPNOTSUPP; 416 break; 417 418 case DVACT_DEACTIVATE: 419 /* 420 * Nothing to do; we key off the device's DVF_ACTIVE. 421 */ 422 break; 423 } 424 return (rv); 425 } 426 427 int 428 stdetach(self, flags) 429 struct device *self; 430 int flags; 431 { 432 struct st_softc *st = (struct st_softc *)self; 433 struct buf *bp; 434 int s, bmaj, cmaj, mn; 435 436 /* locate the major number */ 437 bmaj = bdevsw_lookup_major(&st_bdevsw); 438 cmaj = cdevsw_lookup_major(&st_cdevsw); 439 440 s = splbio(); 441 442 /* Kill off any queued buffers. */ 443 while ((bp = BUFQ_GET(&st->buf_queue)) != NULL) { 444 bp->b_error = EIO; 445 bp->b_flags |= B_ERROR; 446 bp->b_resid = bp->b_bcount; 447 biodone(bp); 448 } 449 450 bufq_free(&st->buf_queue); 451 452 /* Kill off any pending commands. */ 453 scsipi_kill_pending(st->sc_periph); 454 455 splx(s); 456 457 /* Nuke the vnodes for any open instances */ 458 mn = STUNIT(self->dv_unit); 459 vdevgone(bmaj, mn, mn+STNMINOR-1, VBLK); 460 vdevgone(cmaj, mn, mn+STNMINOR-1, VCHR); 461 462 463 #if NRND > 0 464 /* Unhook the entropy source. */ 465 rnd_detach_source(&st->rnd_source); 466 #endif 467 468 return (0); 469 } 470 471 /* 472 * Use the inquiry routine in 'scsi_base' to get drive info so we can 473 * Further tailor our behaviour. 474 */ 475 void 476 st_identify_drive(st, inqbuf) 477 struct st_softc *st; 478 struct scsipi_inquiry_pattern *inqbuf; 479 { 480 struct st_quirk_inquiry_pattern *finger; 481 int priority; 482 483 finger = (struct st_quirk_inquiry_pattern *)scsipi_inqmatch(inqbuf, 484 (caddr_t)st_quirk_patterns, 485 sizeof(st_quirk_patterns) / sizeof(st_quirk_patterns[0]), 486 sizeof(st_quirk_patterns[0]), &priority); 487 if (priority != 0) { 488 st->quirkdata = &finger->quirkdata; 489 st->drive_quirks = finger->quirkdata.quirks; 490 st->quirks = finger->quirkdata.quirks; /* start value */ 491 st->page_0_size = finger->quirkdata.page_0_size; 492 st_loadquirks(st); 493 } 494 } 495 496 /* 497 * initialise the subdevices to the default (QUIRK) state. 498 * this will remove any setting made by the system operator or previous 499 * operations. 500 */ 501 void 502 st_loadquirks(st) 503 struct st_softc *st; 504 { 505 int i; 506 struct modes *mode; 507 struct modes *mode2; 508 509 mode = st->quirkdata->modes; 510 mode2 = st->modes; 511 for (i = 0; i < 4; i++) { 512 memset(mode2, 0, sizeof(struct modes)); 513 st->modeflags[i] &= ~(BLKSIZE_SET_BY_QUIRK | 514 DENSITY_SET_BY_QUIRK | BLKSIZE_SET_BY_USER | 515 DENSITY_SET_BY_USER); 516 if ((mode->quirks | st->drive_quirks) & ST_Q_FORCE_BLKSIZE) { 517 mode2->blksize = mode->blksize; 518 st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; 519 } 520 if (mode->density) { 521 mode2->density = mode->density; 522 st->modeflags[i] |= DENSITY_SET_BY_QUIRK; 523 } 524 mode2->quirks |= mode->quirks; 525 mode++; 526 mode2++; 527 } 528 } 529 530 /* 531 * open the device. 532 */ 533 int 534 stopen(dev, flags, mode, p) 535 dev_t dev; 536 int flags; 537 int mode; 538 struct proc *p; 539 { 540 u_int stmode, dsty; 541 int error, sflags, unit, tries, ntries; 542 struct st_softc *st; 543 struct scsipi_periph *periph; 544 struct scsipi_adapter *adapt; 545 546 unit = STUNIT(dev); 547 if (unit >= st_cd.cd_ndevs) 548 return (ENXIO); 549 st = st_cd.cd_devs[unit]; 550 if (st == NULL) 551 return (ENXIO); 552 553 stmode = STMODE(dev); 554 dsty = STDSTY(dev); 555 556 periph = st->sc_periph; 557 adapt = periph->periph_channel->chan_adapter; 558 559 SC_DEBUG(periph, SCSIPI_DB1, ("open: dev=0x%x (unit %d (of %d))\n", dev, 560 unit, st_cd.cd_ndevs)); 561 562 563 /* 564 * Only allow one at a time 565 */ 566 if (periph->periph_flags & PERIPH_OPEN) { 567 printf("%s: already open\n", st->sc_dev.dv_xname); 568 return (EBUSY); 569 } 570 571 if ((error = scsipi_adapter_addref(adapt)) != 0) 572 return (error); 573 574 /* 575 * clear any latched errors. 576 */ 577 st->mt_resid = 0; 578 st->mt_erreg = 0; 579 st->asc = 0; 580 st->ascq = 0; 581 582 /* 583 * Catch any unit attention errors. Be silent about this 584 * unless we're already mounted. We ignore media change 585 * if we're in control mode or not mounted yet. 586 */ 587 if ((st->flags & ST_MOUNTED) == 0 || stmode == CTRL_MODE) { 588 #ifdef SCSIDEBUG 589 sflags = XS_CTL_IGNORE_MEDIA_CHANGE; 590 #else 591 sflags = XS_CTL_SILENT|XS_CTL_IGNORE_MEDIA_CHANGE; 592 #endif 593 } else 594 sflags = 0; 595 596 /* 597 * If we're already mounted or we aren't configured for 598 * a mount delay, only try a test unit ready once. Otherwise, 599 * try up to ST_MOUNT_DELAY times with a rest interval of 600 * one second between each try. 601 */ 602 603 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0) { 604 ntries = 1; 605 } else { 606 ntries = ST_MOUNT_DELAY; 607 } 608 609 for (error = tries = 0; tries < ntries; tries++) { 610 int slpintr, oflags; 611 612 /* 613 * If we had no error, or we're opening the control mode 614 * device, we jump out right away. 615 */ 616 617 error = scsipi_test_unit_ready(periph, sflags); 618 if (error == 0 || stmode == CTRL_MODE) { 619 break; 620 } 621 622 /* 623 * We had an error. 624 * 625 * If we're already mounted or we aren't configured for 626 * a mount delay, or the error isn't a NOT READY error, 627 * skip to the error exit now. 628 */ 629 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0 || 630 (st->mt_key != SKEY_NOT_READY)) { 631 goto bad; 632 } 633 634 /* 635 * clear any latched errors. 636 */ 637 st->mt_resid = 0; 638 st->mt_erreg = 0; 639 st->asc = 0; 640 st->ascq = 0; 641 642 /* 643 * Fake that we have the device open so 644 * we block other apps from getting in. 645 */ 646 647 oflags = periph->periph_flags; 648 periph->periph_flags |= PERIPH_OPEN; 649 650 slpintr = tsleep(&lbolt, PUSER|PCATCH, "stload", 0); 651 652 periph->periph_flags = oflags; /* restore flags */ 653 if (slpintr) { 654 goto bad; 655 } 656 } 657 658 659 /* 660 * If the mode is 3 (e.g. minor = 3,7,11,15) then the device has 661 * been opened to set defaults and perform other, usually non-I/O 662 * related, operations. In this case, do a quick check to see 663 * whether the unit actually had a tape loaded (this will be known 664 * as to whether or not we got a NOT READY for the above 665 * unit attention). If a tape is there, go do a mount sequence. 666 */ 667 if (stmode == CTRL_MODE && st->mt_key == SKEY_NOT_READY) { 668 periph->periph_flags |= PERIPH_OPEN; 669 return (0); 670 } 671 672 /* 673 * If we get this far and had an error set, that means we failed 674 * to pass the 'test unit ready' test for the non-controlmode device, 675 * so we bounce the open. 676 */ 677 678 if (error) 679 return (error); 680 681 /* 682 * Else, we're now committed to saying we're open. 683 */ 684 685 periph->periph_flags |= PERIPH_OPEN; /* unit attn are now errors */ 686 687 /* 688 * If it's a different mode, or if the media has been 689 * invalidated, unmount the tape from the previous 690 * session but continue with open processing 691 */ 692 if (st->last_dsty != dsty || 693 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 694 st_unmount(st, NOEJECT); 695 696 /* 697 * If we are not mounted, then we should start a new 698 * mount session. 699 */ 700 if (!(st->flags & ST_MOUNTED)) { 701 if ((error = st_mount_tape(dev, flags)) != 0) 702 goto bad; 703 st->last_dsty = dsty; 704 } 705 if (!(st->quirks & ST_Q_NOPREVENT)) { 706 scsipi_prevent(periph, PR_PREVENT, 707 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 708 } 709 710 SC_DEBUG(periph, SCSIPI_DB2, ("open complete\n")); 711 return (0); 712 713 bad: 714 st_unmount(st, NOEJECT); 715 scsipi_adapter_delref(adapt); 716 periph->periph_flags &= ~PERIPH_OPEN; 717 return (error); 718 } 719 720 /* 721 * close the device.. only called if we are the LAST 722 * occurence of an open device 723 */ 724 int 725 stclose(dev, flags, mode, p) 726 dev_t dev; 727 int flags; 728 int mode; 729 struct proc *p; 730 { 731 int stxx, error = 0; 732 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 733 struct scsipi_periph *periph = st->sc_periph; 734 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 735 736 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("closing\n")); 737 738 /* 739 * Make sure that a tape opened in write-only mode will have 740 * file marks written on it when closed, even if not written to. 741 * 742 * This is for SUN compatibility. Actually, the Sun way of 743 * things is to: 744 * 745 * only write filemarks if there are fmks to be written and 746 * - open for write (possibly read/write) 747 * - the last operation was a write 748 * or: 749 * - opened for wronly 750 * - no data was written (including filemarks) 751 */ 752 753 stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); 754 if (((flags & FWRITE) && stxx == ST_WRITTEN) || 755 ((flags & O_ACCMODE) == FWRITE && stxx == 0)) { 756 int nm; 757 error = st_check_eod(st, FALSE, &nm, 0); 758 } 759 760 /* 761 * Allow robots to eject tape if needed. 762 */ 763 scsipi_prevent(periph, PR_ALLOW, 764 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 765 766 switch (STMODE(dev)) { 767 case NORMAL_MODE: 768 st_unmount(st, NOEJECT); 769 break; 770 case NOREW_MODE: 771 case CTRL_MODE: 772 /* 773 * Leave mounted unless media seems to have been removed. 774 * 775 * Otherwise, if we're to terminate a tape with more than one 776 * filemark [ and because we're not rewinding here ], backspace 777 * one filemark so that later appends will see an unbroken 778 * sequence of: 779 * 780 * file - FMK - file - FMK ... file - FMK FMK (EOM) 781 */ 782 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 783 st_unmount(st, NOEJECT); 784 } else if (error == 0) { 785 /* 786 * ST_WRITTEN was preserved from above. 787 * 788 * All we need to know here is: 789 * 790 * Were we writing this tape and was the last 791 * operation a write? 792 * 793 * Are there supposed to be 2FM at EOD? 794 * 795 * If both statements are true, then we backspace 796 * one filemark. 797 */ 798 stxx |= (st->flags & ST_2FM_AT_EOD); 799 if ((flags & FWRITE) != 0 && 800 (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { 801 error = st_space(st, -1, SP_FILEMARKS, 0); 802 } 803 } 804 break; 805 case EJECT_MODE: 806 st_unmount(st, EJECT); 807 break; 808 } 809 810 scsipi_wait_drain(periph); 811 812 scsipi_adapter_delref(adapt); 813 periph->periph_flags &= ~PERIPH_OPEN; 814 815 return (error); 816 } 817 818 /* 819 * Start a new mount session. 820 * Copy in all the default parameters from the selected device mode. 821 * and try guess any that seem to be defaulted. 822 */ 823 int 824 st_mount_tape(dev, flags) 825 dev_t dev; 826 int flags; 827 { 828 int unit; 829 u_int dsty; 830 struct st_softc *st; 831 struct scsipi_periph *periph; 832 int error = 0; 833 834 unit = STUNIT(dev); 835 dsty = STDSTY(dev); 836 st = st_cd.cd_devs[unit]; 837 periph = st->sc_periph; 838 839 if (st->flags & ST_MOUNTED) 840 return (0); 841 842 SC_DEBUG(periph, SCSIPI_DB1, ("mounting\n ")); 843 st->flags |= ST_NEW_MOUNT; 844 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 845 /* 846 * If the media is new, then make sure we give it a chance to 847 * to do a 'load' instruction. (We assume it is new.) 848 */ 849 if ((error = st_load(st, LD_LOAD, XS_CTL_SILENT)) != 0) 850 return (error); 851 /* 852 * Throw another dummy instruction to catch 853 * 'Unit attention' errors. Many drives give 854 * these after doing a Load instruction (with 855 * the MEDIUM MAY HAVE CHANGED asc/ascq). 856 */ 857 scsipi_test_unit_ready(periph, XS_CTL_SILENT); /* XXX */ 858 859 /* 860 * Some devices can't tell you much until they have been 861 * asked to look at the media. This quirk does this. 862 */ 863 if (st->quirks & ST_Q_SENSE_HELP) 864 if ((error = st_touch_tape(st)) != 0) 865 return (error); 866 /* 867 * Load the physical device parameters 868 * loads: blkmin, blkmax 869 */ 870 if ((error = st->ops(st, ST_OPS_RBL, 0)) != 0) 871 return (error); 872 /* 873 * Load the media dependent parameters 874 * includes: media_blksize,media_density,numblks 875 * As we have a tape in, it should be reflected here. 876 * If not you may need the "quirk" above. 877 */ 878 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 879 return (error); 880 /* 881 * If we have gained a permanent density from somewhere, 882 * then use it in preference to the one supplied by 883 * default by the driver. 884 */ 885 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 886 st->density = st->modes[dsty].density; 887 else 888 st->density = st->media_density; 889 /* 890 * If we have gained a permanent blocksize 891 * then use it in preference to the one supplied by 892 * default by the driver. 893 */ 894 st->flags &= ~ST_FIXEDBLOCKS; 895 if (st->modeflags[dsty] & 896 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 897 st->blksize = st->modes[dsty].blksize; 898 if (st->blksize) 899 st->flags |= ST_FIXEDBLOCKS; 900 } else { 901 if ((error = st_decide_mode(st, FALSE)) != 0) 902 return (error); 903 } 904 if ((error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 905 /* ATAPI will return ENODEV for this, and this may be OK */ 906 if (error != ENODEV) { 907 printf("%s: cannot set selected mode\n", 908 st->sc_dev.dv_xname); 909 return (error); 910 } 911 } 912 st->flags &= ~ST_NEW_MOUNT; 913 st->flags |= ST_MOUNTED; 914 periph->periph_flags |= PERIPH_MEDIA_LOADED; /* move earlier? */ 915 st->blkno = st->fileno = (daddr_t) 0; 916 return (0); 917 } 918 919 /* 920 * End the present mount session. 921 * Rewind, and optionally eject the tape. 922 * Reset various flags to indicate that all new 923 * operations require another mount operation 924 */ 925 void 926 st_unmount(st, eject) 927 struct st_softc *st; 928 boolean eject; 929 { 930 struct scsipi_periph *periph = st->sc_periph; 931 int nmarks; 932 933 if ((st->flags & ST_MOUNTED) == 0) 934 return; 935 SC_DEBUG(periph, SCSIPI_DB1, ("unmounting\n")); 936 st_check_eod(st, FALSE, &nmarks, XS_CTL_IGNORE_NOT_READY); 937 st_rewind(st, 0, XS_CTL_IGNORE_NOT_READY); 938 939 /* 940 * Section 9.3.3 of the SCSI specs states that a device shall return 941 * the density value specified in the last succesfull MODE SELECT 942 * after an unload operation, in case it is not able to 943 * automatically determine the density of the new medium. 944 * 945 * So we instruct the device to use the default density, which will 946 * prevent the use of stale density values (in particular, 947 * in st_touch_tape(). 948 */ 949 st->density = 0; 950 if (st->ops(st, ST_OPS_MODESELECT, 0) != 0) { 951 printf("%s: WARNING: cannot revert to default density\n", 952 st->sc_dev.dv_xname); 953 } 954 955 if (eject) { 956 if (!(st->quirks & ST_Q_NOPREVENT)) { 957 scsipi_prevent(periph, PR_ALLOW, 958 XS_CTL_IGNORE_ILLEGAL_REQUEST | 959 XS_CTL_IGNORE_NOT_READY); 960 } 961 st_load(st, LD_UNLOAD, XS_CTL_IGNORE_NOT_READY); 962 st->blkno = st->fileno = (daddr_t) -1; 963 } else { 964 st->blkno = st->fileno = (daddr_t) 0; 965 } 966 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 967 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 968 } 969 970 /* 971 * Given all we know about the device, media, mode, 'quirks' and 972 * initial operation, make a decision as to how we should be set 973 * to run (regarding blocking and EOD marks) 974 */ 975 int 976 st_decide_mode(st, first_read) 977 struct st_softc *st; 978 boolean first_read; 979 { 980 981 SC_DEBUG(st->sc_periph, SCSIPI_DB2, ("starting block mode decision\n")); 982 983 /* 984 * If the drive can only handle fixed-length blocks and only at 985 * one size, perhaps we should just do that. 986 */ 987 if (st->blkmin && (st->blkmin == st->blkmax)) { 988 st->flags |= ST_FIXEDBLOCKS; 989 st->blksize = st->blkmin; 990 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 991 ("blkmin == blkmax of %d\n", st->blkmin)); 992 goto done; 993 } 994 /* 995 * If the tape density mandates (or even suggests) use of fixed 996 * or variable-length blocks, comply. 997 */ 998 switch (st->density) { 999 case HALFINCH_800: 1000 case HALFINCH_1600: 1001 case HALFINCH_6250: 1002 case DDS: 1003 st->flags &= ~ST_FIXEDBLOCKS; 1004 st->blksize = 0; 1005 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1006 ("density specified variable\n")); 1007 goto done; 1008 case QIC_11: 1009 case QIC_24: 1010 case QIC_120: 1011 case QIC_150: 1012 case QIC_525: 1013 case QIC_1320: 1014 case QIC_3095: 1015 case QIC_3220: 1016 st->flags |= ST_FIXEDBLOCKS; 1017 if (st->media_blksize > 0) 1018 st->blksize = st->media_blksize; 1019 else 1020 st->blksize = DEF_FIXED_BSIZE; 1021 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1022 ("density specified fixed\n")); 1023 goto done; 1024 } 1025 /* 1026 * If we're about to read the tape, perhaps we should choose 1027 * fixed or variable-length blocks and block size according to 1028 * what the drive found on the tape. 1029 */ 1030 if (first_read && 1031 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 1032 (st->media_blksize == DEF_FIXED_BSIZE) || 1033 (st->media_blksize == 1024))) { 1034 if (st->media_blksize > 0) 1035 st->flags |= ST_FIXEDBLOCKS; 1036 else 1037 st->flags &= ~ST_FIXEDBLOCKS; 1038 st->blksize = st->media_blksize; 1039 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1040 ("Used media_blksize of %d\n", st->media_blksize)); 1041 goto done; 1042 } 1043 /* 1044 * We're getting no hints from any direction. Choose variable- 1045 * length blocks arbitrarily. 1046 */ 1047 st->flags &= ~ST_FIXEDBLOCKS; 1048 st->blksize = 0; 1049 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1050 ("Give up and default to variable mode\n")); 1051 1052 done: 1053 /* 1054 * Decide whether or not to write two file marks to signify end- 1055 * of-data. Make the decision as a function of density. If 1056 * the decision is not to use a second file mark, the SCSI BLANK 1057 * CHECK condition code will be recognized as end-of-data when 1058 * first read. 1059 * (I think this should be a by-product of fixed/variable..julian) 1060 */ 1061 switch (st->density) { 1062 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 1063 case QIC_11: 1064 case QIC_24: 1065 case QIC_120: 1066 case QIC_150: 1067 case QIC_525: 1068 case QIC_1320: 1069 case QIC_3095: 1070 case QIC_3220: 1071 st->flags &= ~ST_2FM_AT_EOD; 1072 break; 1073 default: 1074 st->flags |= ST_2FM_AT_EOD; 1075 } 1076 return (0); 1077 } 1078 1079 /* 1080 * Actually translate the requested transfer into 1081 * one the physical driver can understand 1082 * The transfer is described by a buf and will include 1083 * only one physical transfer. 1084 */ 1085 void 1086 ststrategy(bp) 1087 struct buf *bp; 1088 { 1089 struct st_softc *st = st_cd.cd_devs[STUNIT(bp->b_dev)]; 1090 int s; 1091 1092 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1093 ("ststrategy %ld bytes @ blk %d\n", bp->b_bcount, bp->b_blkno)); 1094 /* 1095 * If it's a null transfer, return immediatly 1096 */ 1097 if (bp->b_bcount == 0) 1098 goto done; 1099 1100 /* If offset is negative, error */ 1101 if (bp->b_blkno < 0) { 1102 bp->b_error = EINVAL; 1103 goto bad; 1104 } 1105 1106 /* 1107 * Odd sized request on fixed drives are verboten 1108 */ 1109 if (st->flags & ST_FIXEDBLOCKS) { 1110 if (bp->b_bcount % st->blksize) { 1111 printf("%s: bad request, must be multiple of %d\n", 1112 st->sc_dev.dv_xname, st->blksize); 1113 bp->b_error = EIO; 1114 goto bad; 1115 } 1116 } 1117 /* 1118 * as are out-of-range requests on variable drives. 1119 */ 1120 else if (bp->b_bcount < st->blkmin || 1121 (st->blkmax && bp->b_bcount > st->blkmax)) { 1122 printf("%s: bad request, must be between %d and %d\n", 1123 st->sc_dev.dv_xname, st->blkmin, st->blkmax); 1124 bp->b_error = EIO; 1125 goto bad; 1126 } 1127 s = splbio(); 1128 1129 /* 1130 * Place it in the queue of activities for this tape 1131 * at the end (a bit silly because we only have on user.. 1132 * (but it could fork())) 1133 */ 1134 BUFQ_PUT(&st->buf_queue, bp); 1135 1136 /* 1137 * Tell the device to get going on the transfer if it's 1138 * not doing anything, otherwise just wait for completion 1139 * (All a bit silly if we're only allowing 1 open but..) 1140 */ 1141 ststart(st->sc_periph); 1142 1143 splx(s); 1144 return; 1145 bad: 1146 bp->b_flags |= B_ERROR; 1147 done: 1148 /* 1149 * Correctly set the buf to indicate a completed xfer 1150 */ 1151 bp->b_resid = bp->b_bcount; 1152 biodone(bp); 1153 return; 1154 } 1155 1156 /* 1157 * ststart looks to see if there is a buf waiting for the device 1158 * and that the device is not already busy. If both are true, 1159 * It dequeues the buf and creates a scsi command to perform the 1160 * transfer required. The transfer request will call scsipi_done 1161 * on completion, which will in turn call this routine again 1162 * so that the next queued transfer is performed. 1163 * The bufs are queued by the strategy routine (ststrategy) 1164 * 1165 * This routine is also called after other non-queued requests 1166 * have been made of the scsi driver, to ensure that the queue 1167 * continues to be drained. 1168 * ststart() is called at splbio 1169 */ 1170 void 1171 ststart(periph) 1172 struct scsipi_periph *periph; 1173 { 1174 struct st_softc *st = (void *)periph->periph_dev; 1175 struct buf *bp; 1176 struct scsi_rw_tape cmd; 1177 int flags, error; 1178 1179 SC_DEBUG(periph, SCSIPI_DB2, ("ststart ")); 1180 /* 1181 * See if there is a buf to do and we are not already 1182 * doing one 1183 */ 1184 while (periph->periph_active < periph->periph_openings) { 1185 /* if a special awaits, let it proceed first */ 1186 if (periph->periph_flags & PERIPH_WAITING) { 1187 periph->periph_flags &= ~PERIPH_WAITING; 1188 wakeup((caddr_t)periph); 1189 return; 1190 } 1191 1192 if ((bp = BUFQ_GET(&st->buf_queue)) == NULL) 1193 return; 1194 1195 /* 1196 * If the device has been unmounted by the user 1197 * then throw away all requests until done. 1198 */ 1199 if ((st->flags & ST_MOUNTED) == 0 || 1200 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 1201 /* make sure that one implies the other.. */ 1202 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 1203 bp->b_flags |= B_ERROR; 1204 bp->b_error = EIO; 1205 bp->b_resid = bp->b_bcount; 1206 biodone(bp); 1207 continue; 1208 } 1209 /* 1210 * only FIXEDBLOCK devices have pending I/O or space operations. 1211 */ 1212 if (st->flags & ST_FIXEDBLOCKS) { 1213 /* 1214 * If we are at a filemark but have not reported it yet 1215 * then we should report it now 1216 */ 1217 if (st->flags & ST_AT_FILEMARK) { 1218 if ((bp->b_flags & B_READ) == B_WRITE) { 1219 /* 1220 * Handling of ST_AT_FILEMARK in 1221 * st_space will fill in the right file 1222 * mark count. 1223 * Back up over filemark 1224 */ 1225 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1226 bp->b_flags |= B_ERROR; 1227 bp->b_error = EIO; 1228 biodone(bp); 1229 continue; 1230 } 1231 } else { 1232 bp->b_resid = bp->b_bcount; 1233 bp->b_error = 0; 1234 bp->b_flags &= ~B_ERROR; 1235 st->flags &= ~ST_AT_FILEMARK; 1236 biodone(bp); 1237 continue; /* seek more work */ 1238 } 1239 } 1240 } 1241 /* 1242 * If we are at EOM but have not reported it 1243 * yet then we should report it now. 1244 */ 1245 if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { 1246 bp->b_resid = bp->b_bcount; 1247 if (st->flags & ST_EIO_PENDING) { 1248 bp->b_error = EIO; 1249 bp->b_flags |= B_ERROR; 1250 } 1251 st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); 1252 biodone(bp); 1253 continue; /* seek more work */ 1254 } 1255 1256 /* 1257 * Fill out the scsi command 1258 */ 1259 memset(&cmd, 0, sizeof(cmd)); 1260 flags = XS_CTL_NOSLEEP | XS_CTL_ASYNC; 1261 if ((bp->b_flags & B_READ) == B_WRITE) { 1262 cmd.opcode = WRITE; 1263 st->flags &= ~ST_FM_WRITTEN; 1264 flags |= XS_CTL_DATA_OUT; 1265 } else { 1266 cmd.opcode = READ; 1267 flags |= XS_CTL_DATA_IN; 1268 } 1269 1270 /* 1271 * Handle "fixed-block-mode" tape drives by using the 1272 * block count instead of the length. 1273 */ 1274 if (st->flags & ST_FIXEDBLOCKS) { 1275 cmd.byte2 |= SRW_FIXED; 1276 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1277 } else 1278 _lto3b(bp->b_bcount, cmd.len); 1279 1280 /* 1281 * Clear 'position updated' indicator 1282 */ 1283 st->flags &= ~ST_POSUPDATED; 1284 1285 /* 1286 * go ask the adapter to do all this for us 1287 */ 1288 error = scsipi_command(periph, 1289 (struct scsipi_generic *)&cmd, sizeof(cmd), 1290 (u_char *)bp->b_data, bp->b_bcount, 1291 0, ST_IO_TIME, bp, flags); 1292 if (error) { 1293 printf("%s: not queued, error %d\n", 1294 st->sc_dev.dv_xname, error); 1295 } 1296 } /* go back and see if we can cram more work in.. */ 1297 } 1298 1299 void 1300 stdone(xs) 1301 struct scsipi_xfer *xs; 1302 { 1303 struct st_softc *st = (void *)xs->xs_periph->periph_dev; 1304 1305 if (xs->bp != NULL) { 1306 if ((xs->bp->b_flags & B_READ) == B_WRITE) { 1307 st->flags |= ST_WRITTEN; 1308 } else { 1309 st->flags &= ~ST_WRITTEN; 1310 } 1311 #if NRND > 0 1312 rnd_add_uint32(&st->rnd_source, xs->bp->b_blkno); 1313 #endif 1314 1315 if ((st->flags & ST_POSUPDATED) == 0) { 1316 if (xs->bp->b_flags & B_ERROR) { 1317 st->fileno = st->blkno = -1; 1318 } else if (st->blkno != -1) { 1319 if (st->flags & ST_FIXEDBLOCKS) { 1320 st->blkno += 1321 (xs->bp->b_bcount / st->blksize); 1322 } else { 1323 st->blkno++; 1324 } 1325 } 1326 } 1327 } 1328 } 1329 1330 int 1331 stread(dev, uio, iomode) 1332 dev_t dev; 1333 struct uio *uio; 1334 int iomode; 1335 { 1336 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1337 1338 return (physio(ststrategy, NULL, dev, B_READ, 1339 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1340 } 1341 1342 int 1343 stwrite(dev, uio, iomode) 1344 dev_t dev; 1345 struct uio *uio; 1346 int iomode; 1347 { 1348 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1349 1350 return (physio(ststrategy, NULL, dev, B_WRITE, 1351 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1352 } 1353 1354 /* 1355 * Perform special action on behalf of the user; 1356 * knows about the internals of this device 1357 */ 1358 int 1359 stioctl(dev, cmd, arg, flag, p) 1360 dev_t dev; 1361 u_long cmd; 1362 caddr_t arg; 1363 int flag; 1364 struct proc *p; 1365 { 1366 int error = 0; 1367 int unit; 1368 int number, nmarks, dsty; 1369 int flags; 1370 struct st_softc *st; 1371 int hold_blksize; 1372 u_int8_t hold_density; 1373 struct mtop *mt = (struct mtop *) arg; 1374 1375 /* 1376 * Find the device that the user is talking about 1377 */ 1378 flags = 0; /* give error messages, act on errors etc. */ 1379 unit = STUNIT(dev); 1380 dsty = STDSTY(dev); 1381 st = st_cd.cd_devs[unit]; 1382 hold_blksize = st->blksize; 1383 hold_density = st->density; 1384 1385 switch ((u_int) cmd) { 1386 1387 case MTIOCGET: { 1388 struct mtget *g = (struct mtget *) arg; 1389 /* 1390 * (to get the current state of READONLY) 1391 */ 1392 error = st->ops(st, ST_OPS_MODESENSE, XS_CTL_SILENT); 1393 if (error) { 1394 /* 1395 * Ignore the error if in control mode; 1396 * this is mandated by st(4). 1397 */ 1398 if (STMODE(dev) != CTRL_MODE) 1399 break; 1400 error = 0; 1401 } 1402 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("[ioctl: get status]\n")); 1403 memset(g, 0, sizeof(struct mtget)); 1404 g->mt_type = 0x7; /* Ultrix compat *//*? */ 1405 g->mt_blksiz = st->blksize; 1406 g->mt_density = st->density; 1407 g->mt_mblksiz[0] = st->modes[0].blksize; 1408 g->mt_mblksiz[1] = st->modes[1].blksize; 1409 g->mt_mblksiz[2] = st->modes[2].blksize; 1410 g->mt_mblksiz[3] = st->modes[3].blksize; 1411 g->mt_mdensity[0] = st->modes[0].density; 1412 g->mt_mdensity[1] = st->modes[1].density; 1413 g->mt_mdensity[2] = st->modes[2].density; 1414 g->mt_mdensity[3] = st->modes[3].density; 1415 g->mt_fileno = st->fileno; 1416 g->mt_blkno = st->blkno; 1417 if (st->flags & ST_READONLY) 1418 g->mt_dsreg |= MT_DS_RDONLY; 1419 if (st->flags & ST_MOUNTED) 1420 g->mt_dsreg |= MT_DS_MOUNTED; 1421 g->mt_resid = st->mt_resid; 1422 g->mt_erreg = st->mt_erreg; 1423 /* 1424 * clear latched errors. 1425 */ 1426 st->mt_resid = 0; 1427 st->mt_erreg = 0; 1428 st->asc = 0; 1429 st->ascq = 0; 1430 break; 1431 } 1432 case MTIOCTOP: { 1433 1434 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1435 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1436 mt->mt_count)); 1437 1438 /* compat: in U*x it is a short */ 1439 number = mt->mt_count; 1440 switch ((short) (mt->mt_op)) { 1441 case MTWEOF: /* write an end-of-file record */ 1442 error = st_write_filemarks(st, number, flags); 1443 break; 1444 case MTBSF: /* backward space file */ 1445 number = -number; 1446 case MTFSF: /* forward space file */ 1447 error = st_check_eod(st, FALSE, &nmarks, flags); 1448 if (!error) 1449 error = st_space(st, number - nmarks, 1450 SP_FILEMARKS, flags); 1451 break; 1452 case MTBSR: /* backward space record */ 1453 number = -number; 1454 case MTFSR: /* forward space record */ 1455 error = st_check_eod(st, TRUE, &nmarks, flags); 1456 if (!error) 1457 error = st_space(st, number, SP_BLKS, flags); 1458 break; 1459 case MTREW: /* rewind */ 1460 error = st_rewind(st, 0, flags); 1461 break; 1462 case MTOFFL: /* rewind and put the drive offline */ 1463 st_unmount(st, EJECT); 1464 break; 1465 case MTNOP: /* no operation, sets status only */ 1466 break; 1467 case MTRETEN: /* retension the tape */ 1468 error = st_load(st, LD_RETENSION, flags); 1469 if (!error) 1470 error = st_load(st, LD_LOAD, flags); 1471 break; 1472 case MTEOM: /* forward space to end of media */ 1473 error = st_check_eod(st, FALSE, &nmarks, flags); 1474 if (!error) 1475 error = st_space(st, 1, SP_EOM, flags); 1476 break; 1477 case MTCACHE: /* enable controller cache */ 1478 st->flags &= ~ST_DONTBUFFER; 1479 goto try_new_value; 1480 case MTNOCACHE: /* disable controller cache */ 1481 st->flags |= ST_DONTBUFFER; 1482 goto try_new_value; 1483 case MTERASE: /* erase volume */ 1484 error = st_erase(st, number, flags); 1485 break; 1486 case MTSETBSIZ: /* Set block size for device */ 1487 #ifdef NOTYET 1488 if (!(st->flags & ST_NEW_MOUNT)) { 1489 uprintf("re-mount tape before changing blocksize"); 1490 error = EINVAL; 1491 break; 1492 } 1493 #endif 1494 if (number == 0) 1495 st->flags &= ~ST_FIXEDBLOCKS; 1496 else { 1497 if ((st->blkmin || st->blkmax) && 1498 (number < st->blkmin || 1499 number > st->blkmax)) { 1500 error = EINVAL; 1501 break; 1502 } 1503 st->flags |= ST_FIXEDBLOCKS; 1504 } 1505 st->blksize = number; 1506 st->flags |= ST_BLOCK_SET; /*XXX */ 1507 goto try_new_value; 1508 1509 case MTSETDNSTY: /* Set density for device and mode */ 1510 /* 1511 * Any number >= 0 and <= 0xff is legal. Numbers 1512 * above 0x80 are 'vendor unique'. 1513 */ 1514 if (number < 0 || number > 255) { 1515 error = EINVAL; 1516 break; 1517 } else 1518 st->density = number; 1519 goto try_new_value; 1520 1521 case MTCMPRESS: 1522 error = st->ops(st, (number == 0) ? 1523 ST_OPS_CMPRSS_OFF : ST_OPS_CMPRSS_ON, 1524 XS_CTL_SILENT); 1525 break; 1526 1527 case MTEWARN: 1528 if (number) 1529 st->flags |= ST_EARLYWARN; 1530 else 1531 st->flags &= ~ST_EARLYWARN; 1532 break; 1533 1534 default: 1535 error = EINVAL; 1536 } 1537 break; 1538 } 1539 case MTIOCIEOT: 1540 case MTIOCEEOT: 1541 break; 1542 1543 case MTIOCRDSPOS: 1544 error = st_rdpos(st, 0, (u_int32_t *) arg); 1545 break; 1546 1547 case MTIOCRDHPOS: 1548 error = st_rdpos(st, 1, (u_int32_t *) arg); 1549 break; 1550 1551 case MTIOCSLOCATE: 1552 error = st_setpos(st, 0, (u_int32_t *) arg); 1553 break; 1554 1555 case MTIOCHLOCATE: 1556 error = st_setpos(st, 1, (u_int32_t *) arg); 1557 break; 1558 1559 1560 default: 1561 error = scsipi_do_ioctl(st->sc_periph, dev, cmd, arg, 1562 flag, p); 1563 break; 1564 } 1565 return (error); 1566 /*-----------------------------*/ 1567 try_new_value: 1568 /* 1569 * Check that the mode being asked for is aggreeable to the 1570 * drive. If not, put it back the way it was. 1571 * 1572 * If in control mode, we can make (persistent) mode changes 1573 * even if no medium is loaded (see st(4)). 1574 */ 1575 if ((STMODE(dev) != CTRL_MODE || (st->flags & ST_MOUNTED) != 0) && 1576 (error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 1577 /* put it back as it was */ 1578 printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); 1579 st->density = hold_density; 1580 st->blksize = hold_blksize; 1581 if (st->blksize) 1582 st->flags |= ST_FIXEDBLOCKS; 1583 else 1584 st->flags &= ~ST_FIXEDBLOCKS; 1585 return (error); 1586 } 1587 /* 1588 * As the drive liked it, if we are setting a new default, 1589 * set it into the structures as such. 1590 * 1591 * The means for deciding this are not finalised yet- but 1592 * if the device was opened in Control Mode, the values 1593 * are persistent now across mounts. 1594 */ 1595 if (STMODE(dev) == CTRL_MODE) { 1596 switch ((short) (mt->mt_op)) { 1597 case MTSETBSIZ: 1598 st->modes[dsty].blksize = st->blksize; 1599 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1600 break; 1601 case MTSETDNSTY: 1602 st->modes[dsty].density = st->density; 1603 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1604 break; 1605 } 1606 } 1607 return (0); 1608 } 1609 1610 /* 1611 * Do a synchronous read. 1612 */ 1613 int 1614 st_read(st, buf, size, flags) 1615 struct st_softc *st; 1616 int size; 1617 int flags; 1618 char *buf; 1619 { 1620 struct scsi_rw_tape cmd; 1621 1622 /* 1623 * If it's a null transfer, return immediatly 1624 */ 1625 if (size == 0) 1626 return (0); 1627 memset(&cmd, 0, sizeof(cmd)); 1628 cmd.opcode = READ; 1629 if (st->flags & ST_FIXEDBLOCKS) { 1630 cmd.byte2 |= SRW_FIXED; 1631 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1632 cmd.len); 1633 } else 1634 _lto3b(size, cmd.len); 1635 return (scsipi_command(st->sc_periph, 1636 (struct scsipi_generic *)&cmd, sizeof(cmd), 1637 (u_char *)buf, size, 0, ST_IO_TIME, NULL, flags | XS_CTL_DATA_IN)); 1638 } 1639 1640 /* 1641 * issue an erase command 1642 */ 1643 int 1644 st_erase(st, full, flags) 1645 struct st_softc *st; 1646 int full, flags; 1647 { 1648 int tmo; 1649 struct scsi_erase cmd; 1650 1651 /* 1652 * Full erase means set LONG bit in erase command, which asks 1653 * the drive to erase the entire unit. Without this bit, we're 1654 * asking the drive to write an erase gap. 1655 */ 1656 memset(&cmd, 0, sizeof(cmd)); 1657 cmd.opcode = ERASE; 1658 if (full) { 1659 cmd.byte2 = SE_LONG; 1660 tmo = ST_SPC_TIME; 1661 } else { 1662 tmo = ST_IO_TIME; 1663 } 1664 1665 /* 1666 * XXX We always do this asynchronously, for now, unless the device 1667 * has the ST_Q_ERASE_NOIMM quirk. How long should we wait if we 1668 * want to (eventually) to it synchronously? 1669 */ 1670 if ((st->quirks & ST_Q_ERASE_NOIMM) == 0) 1671 cmd.byte2 |= SE_IMMED; 1672 1673 return (scsipi_command(st->sc_periph, 1674 (struct scsipi_generic *)&cmd, sizeof(cmd), 1675 0, 0, ST_RETRIES, tmo, NULL, flags)); 1676 } 1677 1678 /* 1679 * skip N blocks/filemarks/seq filemarks/eom 1680 */ 1681 int 1682 st_space(st, number, what, flags) 1683 struct st_softc *st; 1684 u_int what; 1685 int flags; 1686 int number; 1687 { 1688 struct scsi_space cmd; 1689 int error; 1690 1691 switch (what) { 1692 case SP_BLKS: 1693 if (st->flags & ST_PER_ACTION) { 1694 if (number > 0) { 1695 st->flags &= ~ST_PER_ACTION; 1696 return (EIO); 1697 } else if (number < 0) { 1698 if (st->flags & ST_AT_FILEMARK) { 1699 /* 1700 * Handling of ST_AT_FILEMARK 1701 * in st_space will fill in the 1702 * right file mark count. 1703 */ 1704 error = st_space(st, 0, SP_FILEMARKS, 1705 flags); 1706 if (error) 1707 return (error); 1708 } 1709 if (st->flags & ST_BLANK_READ) { 1710 st->flags &= ~ST_BLANK_READ; 1711 return (EIO); 1712 } 1713 st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); 1714 } 1715 } 1716 break; 1717 case SP_FILEMARKS: 1718 if (st->flags & ST_EIO_PENDING) { 1719 if (number > 0) { 1720 /* pretend we just discovered the error */ 1721 st->flags &= ~ST_EIO_PENDING; 1722 return (EIO); 1723 } else if (number < 0) { 1724 /* back away from the error */ 1725 st->flags &= ~ST_EIO_PENDING; 1726 } 1727 } 1728 if (st->flags & ST_AT_FILEMARK) { 1729 st->flags &= ~ST_AT_FILEMARK; 1730 number--; 1731 } 1732 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 1733 /* back away from unwritten tape */ 1734 st->flags &= ~ST_BLANK_READ; 1735 number++; /* XXX dubious */ 1736 } 1737 break; 1738 case SP_EOM: 1739 if (st->flags & ST_EOM_PENDING) { 1740 /* we're already there */ 1741 st->flags &= ~ST_EOM_PENDING; 1742 return (0); 1743 } 1744 if (st->flags & ST_EIO_PENDING) { 1745 /* pretend we just discovered the error */ 1746 st->flags &= ~ST_EIO_PENDING; 1747 return (EIO); 1748 } 1749 if (st->flags & ST_AT_FILEMARK) 1750 st->flags &= ~ST_AT_FILEMARK; 1751 break; 1752 } 1753 if (number == 0) 1754 return (0); 1755 1756 memset(&cmd, 0, sizeof(cmd)); 1757 cmd.opcode = SPACE; 1758 cmd.byte2 = what; 1759 _lto3b(number, cmd.number); 1760 1761 st->flags &= ~ST_POSUPDATED; 1762 st->last_ctl_resid = 0; 1763 error = scsipi_command(st->sc_periph, 1764 (struct scsipi_generic *)&cmd, sizeof(cmd), 1765 0, 0, 0, ST_SPC_TIME, NULL, flags); 1766 1767 if (error == 0 && (st->flags & ST_POSUPDATED) == 0) { 1768 number = number - st->last_ctl_resid; 1769 if (what == SP_BLKS) { 1770 if (st->blkno != -1) { 1771 st->blkno += number; 1772 } 1773 } else if (what == SP_FILEMARKS) { 1774 if (st->fileno != -1) { 1775 st->fileno += number; 1776 if (number > 0) { 1777 st->blkno = 0; 1778 } else if (number < 0) { 1779 st->blkno = -1; 1780 } 1781 } 1782 } else if (what == SP_EOM) { 1783 /* 1784 * This loses us relative position. 1785 */ 1786 st->fileno = st->blkno = -1; 1787 } 1788 } 1789 return (error); 1790 } 1791 1792 /* 1793 * write N filemarks 1794 */ 1795 int 1796 st_write_filemarks(st, number, flags) 1797 struct st_softc *st; 1798 int flags; 1799 int number; 1800 { 1801 int error; 1802 struct scsi_write_filemarks cmd; 1803 1804 /* 1805 * It's hard to write a negative number of file marks. 1806 * Don't try. 1807 */ 1808 if (number < 0) 1809 return (EINVAL); 1810 switch (number) { 1811 case 0: /* really a command to sync the drive's buffers */ 1812 break; 1813 case 1: 1814 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 1815 st->flags &= ~ST_WRITTEN; 1816 else 1817 st->flags |= ST_FM_WRITTEN; 1818 st->flags &= ~ST_PER_ACTION; 1819 break; 1820 default: 1821 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 1822 } 1823 1824 memset(&cmd, 0, sizeof(cmd)); 1825 cmd.opcode = WRITE_FILEMARKS; 1826 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1827 cmd.byte2 = SR_IMMED; 1828 /* 1829 * The ATAPI Onstream DI-30 doesn't support writing filemarks, but 1830 * WRITE_FILEMARKS is still used to flush the buffer 1831 */ 1832 if ((st->quirks & ST_Q_NOFILEMARKS) == 0) 1833 _lto3b(number, cmd.number); 1834 1835 /* XXX WE NEED TO BE ABLE TO GET A RESIDIUAL XXX */ 1836 error = scsipi_command(st->sc_periph, 1837 (struct scsipi_generic *)&cmd, sizeof(cmd), 1838 0, 0, 0, ST_IO_TIME * 4, NULL, flags); 1839 if (error == 0 && st->fileno != -1) { 1840 st->fileno += number; 1841 } 1842 return (error); 1843 } 1844 1845 /* 1846 * Make sure the right number of file marks is on tape if the 1847 * tape has been written. If the position argument is true, 1848 * leave the tape positioned where it was originally. 1849 * 1850 * nmarks returns the number of marks to skip (or, if position 1851 * true, which were skipped) to get back original position. 1852 */ 1853 int 1854 st_check_eod(st, position, nmarks, flags) 1855 struct st_softc *st; 1856 boolean position; 1857 int *nmarks; 1858 int flags; 1859 { 1860 int error; 1861 1862 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 1863 default: 1864 *nmarks = 0; 1865 return (0); 1866 case ST_WRITTEN: 1867 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 1868 *nmarks = 1; 1869 break; 1870 case ST_WRITTEN | ST_2FM_AT_EOD: 1871 *nmarks = 2; 1872 } 1873 error = st_write_filemarks(st, *nmarks, flags); 1874 if (position && !error) 1875 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 1876 return (error); 1877 } 1878 1879 /* 1880 * load/unload/retension 1881 */ 1882 int 1883 st_load(st, type, flags) 1884 struct st_softc *st; 1885 u_int type; 1886 int flags; 1887 { 1888 int error; 1889 struct scsi_load cmd; 1890 1891 if (type != LD_LOAD) { 1892 int nmarks; 1893 1894 error = st_check_eod(st, FALSE, &nmarks, flags); 1895 if (error) { 1896 printf("%s: failed to write closing filemarks at " 1897 "unload, errno=%d\n", st->sc_dev.dv_xname, error); 1898 return (error); 1899 } 1900 } 1901 if (st->quirks & ST_Q_IGNORE_LOADS) { 1902 if (type == LD_LOAD) { 1903 /* 1904 * If we ignore loads, at least we should try a rewind. 1905 */ 1906 return st_rewind(st, 0, flags); 1907 } 1908 /* otherwise, we should do what's asked of us */ 1909 } 1910 1911 memset(&cmd, 0, sizeof(cmd)); 1912 cmd.opcode = LOAD; 1913 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1914 cmd.byte2 = SR_IMMED; 1915 cmd.how = type; 1916 1917 error = scsipi_command(st->sc_periph, 1918 (struct scsipi_generic *)&cmd, sizeof(cmd), 1919 0, 0, ST_RETRIES, ST_SPC_TIME, NULL, flags); 1920 if (error) { 1921 printf("%s: error %d in st_load (op %d)\n", 1922 st->sc_dev.dv_xname, error, type); 1923 } 1924 return (error); 1925 } 1926 1927 /* 1928 * Rewind the device 1929 */ 1930 int 1931 st_rewind(st, immediate, flags) 1932 struct st_softc *st; 1933 u_int immediate; 1934 int flags; 1935 { 1936 struct scsi_rewind cmd; 1937 int error; 1938 int nmarks; 1939 1940 error = st_check_eod(st, FALSE, &nmarks, flags); 1941 if (error) { 1942 printf("%s: failed to write closing filemarks at " 1943 "rewind, errno=%d\n", st->sc_dev.dv_xname, error); 1944 return (error); 1945 } 1946 st->flags &= ~ST_PER_ACTION; 1947 1948 /* 1949 * ATAPI tapes always need immediate to be set 1950 */ 1951 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1952 immediate = SR_IMMED; 1953 1954 memset(&cmd, 0, sizeof(cmd)); 1955 cmd.opcode = REWIND; 1956 cmd.byte2 = immediate; 1957 1958 error = scsipi_command(st->sc_periph, 1959 (struct scsipi_generic *)&cmd, sizeof(cmd), 0, 0, ST_RETRIES, 1960 immediate ? ST_CTL_TIME: ST_SPC_TIME, NULL, flags); 1961 if (error) { 1962 printf("%s: error %d trying to rewind\n", 1963 st->sc_dev.dv_xname, error); 1964 /* lost position */ 1965 st->fileno = st->blkno = -1; 1966 } else { 1967 st->fileno = st->blkno = 0; 1968 } 1969 return (error); 1970 } 1971 1972 int 1973 st_rdpos(st, hard, blkptr) 1974 struct st_softc *st; 1975 int hard; 1976 u_int32_t *blkptr; 1977 { 1978 int error; 1979 u_int8_t posdata[20]; 1980 struct scsi_tape_read_position cmd; 1981 1982 /* 1983 * We try and flush any buffered writes here if we were writing 1984 * and we're trying to get hardware block position. It eats 1985 * up performance substantially, but I'm wary of drive firmware. 1986 * 1987 * I think that *logical* block position is probably okay- 1988 * but hardware block position might have to wait for data 1989 * to hit media to be valid. Caveat Emptor. 1990 */ 1991 1992 if (hard && (st->flags & ST_WRITTEN)) { 1993 /* 1994 * First flush any pending writes... 1995 */ 1996 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 1997 /* 1998 * The latter case is for 'write protected' tapes 1999 * which are too stupid to recognize a zero count 2000 * for writing filemarks as a no-op. 2001 */ 2002 if (error != 0 && error != EACCES && error != EROFS) 2003 return (error); 2004 } 2005 2006 memset(&cmd, 0, sizeof(cmd)); 2007 memset(&posdata, 0, sizeof(posdata)); 2008 cmd.opcode = READ_POSITION; 2009 if (hard) 2010 cmd.byte1 = 1; 2011 2012 error = scsipi_command(st->sc_periph, 2013 (struct scsipi_generic *)&cmd, sizeof(cmd), (u_char *)&posdata, 2014 sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, 2015 XS_CTL_SILENT | XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); 2016 2017 if (error == 0) { 2018 #if 0 2019 printf("posdata:"); 2020 for (hard = 0; hard < sizeof(posdata); hard++) 2021 printf("%02x ", posdata[hard] & 0xff); 2022 printf("\n"); 2023 #endif 2024 if (posdata[0] & 0x4) /* Block Position Unknown */ 2025 error = EINVAL; 2026 else 2027 *blkptr = _4btol(&posdata[4]); 2028 } 2029 return (error); 2030 } 2031 2032 int 2033 st_setpos(st, hard, blkptr) 2034 struct st_softc *st; 2035 int hard; 2036 u_int32_t *blkptr; 2037 { 2038 int error; 2039 struct scsi_tape_locate cmd; 2040 2041 /* 2042 * We used to try and flush any buffered writes here. 2043 * Now we push this onto user applications to either 2044 * flush the pending writes themselves (via a zero count 2045 * WRITE FILEMARKS command) or they can trust their tape 2046 * drive to do this correctly for them. 2047 * 2048 * There are very ugly performance limitations otherwise. 2049 */ 2050 2051 memset(&cmd, 0, sizeof(cmd)); 2052 cmd.opcode = LOCATE; 2053 if (hard) 2054 cmd.byte2 = 1 << 2; 2055 _lto4b(*blkptr, cmd.blkaddr); 2056 error = scsipi_command(st->sc_periph, 2057 (struct scsipi_generic *)&cmd, sizeof(cmd), 2058 NULL, 0, ST_RETRIES, ST_SPC_TIME, NULL, 0); 2059 /* 2060 * Note file && block number position now unknown (if 2061 * these things ever start being maintained in this driver) 2062 */ 2063 st->fileno = st->blkno = -1; 2064 return (error); 2065 } 2066 2067 2068 /* 2069 * Look at the returned sense and act on the error and determine 2070 * the unix error number to pass back..., 0 (== report no error), 2071 * -1 = retry the operation, -2 continue error processing. 2072 */ 2073 int 2074 st_interpret_sense(xs) 2075 struct scsipi_xfer *xs; 2076 { 2077 struct scsipi_periph *periph = xs->xs_periph; 2078 struct scsipi_sense_data *sense = &xs->sense.scsi_sense; 2079 struct buf *bp = xs->bp; 2080 struct st_softc *st = (void *)periph->periph_dev; 2081 int retval = EJUSTRETURN; 2082 int doprint = ((xs->xs_control & XS_CTL_SILENT) == 0); 2083 u_int8_t key; 2084 int32_t info; 2085 2086 /* 2087 * If it isn't a extended or extended/deferred error, let 2088 * the generic code handle it. 2089 */ 2090 if ((sense->error_code & SSD_ERRCODE) != 0x70 && 2091 (sense->error_code & SSD_ERRCODE) != 0x71) { /* DEFFERRED */ 2092 return (retval); 2093 } 2094 2095 if (sense->error_code & SSD_ERRCODE_VALID) 2096 info = _4btol(sense->info); 2097 else 2098 info = (st->flags & ST_FIXEDBLOCKS) ? 2099 xs->datalen / st->blksize : xs->datalen; 2100 key = sense->flags & SSD_KEY; 2101 st->mt_erreg = key; 2102 st->asc = sense->add_sense_code; 2103 st->ascq = sense->add_sense_code_qual; 2104 st->mt_resid = (short) info; 2105 2106 if (key == SKEY_NOT_READY && st->asc == 0x4 && st->ascq == 0x1) { 2107 /* Not Ready, Logical Unit Is in Process Of Becoming Ready */ 2108 if (!callout_active(&periph->periph_callout)) 2109 scsipi_periph_freeze(periph, 1); 2110 callout_reset(&periph->periph_callout, 2111 hz, scsipi_periph_timed_thaw, periph); 2112 return (ERESTART); 2113 } 2114 2115 /* 2116 * If the device is not open yet, let generic handle 2117 */ 2118 if ((periph->periph_flags & PERIPH_OPEN) == 0) { 2119 return (retval); 2120 } 2121 2122 xs->resid = info; 2123 if (st->flags & ST_FIXEDBLOCKS) { 2124 if (bp) { 2125 xs->resid *= st->blksize; 2126 st->last_io_resid = xs->resid; 2127 } else { 2128 st->last_ctl_resid = xs->resid; 2129 } 2130 if (key == SKEY_VOLUME_OVERFLOW) { 2131 st->flags |= ST_EIO_PENDING; 2132 if (bp) 2133 bp->b_resid = xs->resid; 2134 } else if (sense->flags & SSD_EOM) { 2135 if ((st->flags & ST_EARLYWARN) == 0) 2136 st->flags |= ST_EIO_PENDING; 2137 st->flags |= ST_EOM_PENDING; 2138 if (bp) { 2139 #if 0 2140 bp->b_resid = xs->resid; 2141 #else 2142 /* 2143 * Grotesque as it seems, the few times 2144 * I've actually seen a non-zero resid, 2145 * the tape drive actually lied and had 2146 * written all the data! 2147 */ 2148 bp->b_resid = 0; 2149 #endif 2150 } 2151 } 2152 if (sense->flags & SSD_FILEMARK) { 2153 st->flags |= ST_AT_FILEMARK; 2154 if (bp) 2155 bp->b_resid = xs->resid; 2156 if (st->fileno != (daddr_t) -1) { 2157 st->fileno++; 2158 st->blkno = 0; 2159 st->flags |= ST_POSUPDATED; 2160 } 2161 } 2162 if (sense->flags & SSD_ILI) { 2163 st->flags |= ST_EIO_PENDING; 2164 if (bp) 2165 bp->b_resid = xs->resid; 2166 if (sense->error_code & SSD_ERRCODE_VALID && 2167 (xs->xs_control & XS_CTL_SILENT) == 0) 2168 printf("%s: block wrong size, %d blocks " 2169 "residual\n", st->sc_dev.dv_xname, info); 2170 2171 /* 2172 * This quirk code helps the drive read 2173 * the first tape block, regardless of 2174 * format. That is required for these 2175 * drives to return proper MODE SENSE 2176 * information. 2177 */ 2178 if ((st->quirks & ST_Q_SENSE_HELP) && 2179 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 2180 st->blksize -= 512; 2181 else if ((st->flags & ST_POSUPDATED) == 0) { 2182 if (st->blkno != (daddr_t) -1) { 2183 st->blkno += 2184 (xs->datalen / st->blksize); 2185 st->flags |= ST_POSUPDATED; 2186 } 2187 } 2188 } 2189 /* 2190 * If data wanted and no data was transferred, do it immediately 2191 */ 2192 if (xs->datalen && xs->resid >= xs->datalen) { 2193 if (st->flags & ST_EIO_PENDING) 2194 return (EIO); 2195 if (st->flags & ST_AT_FILEMARK) { 2196 if (bp) 2197 bp->b_resid = xs->resid; 2198 return (0); 2199 } 2200 } 2201 } else { /* must be variable mode */ 2202 if (bp) { 2203 st->last_io_resid = xs->resid; 2204 } else { 2205 st->last_ctl_resid = xs->resid; 2206 } 2207 if (sense->flags & SSD_EOM) { 2208 /* 2209 * The current semantics of this 2210 * driver requires EOM detection 2211 * to return EIO unless early 2212 * warning detection is enabled 2213 * for variable mode (this is always 2214 * on for fixed block mode). 2215 */ 2216 if (st->flags & ST_EARLYWARN) { 2217 st->flags |= ST_EOM_PENDING; 2218 retval = 0; 2219 } else { 2220 retval = EIO; 2221 } 2222 2223 /* 2224 * If it's an unadorned EOM detection, 2225 * suppress printing an error. 2226 */ 2227 if (key == SKEY_NO_SENSE) { 2228 doprint = 0; 2229 } 2230 } else if (sense->flags & SSD_FILEMARK) { 2231 retval = 0; 2232 if (st->fileno != (daddr_t) -1) { 2233 st->fileno++; 2234 st->blkno = 0; 2235 st->flags |= ST_POSUPDATED; 2236 } 2237 } else if (sense->flags & SSD_ILI) { 2238 if (info < 0) { 2239 /* 2240 * The tape record was bigger than the read 2241 * we issued. 2242 */ 2243 if ((xs->xs_control & XS_CTL_SILENT) == 0) { 2244 printf("%s: %d-byte tape record too big" 2245 " for %d-byte user buffer\n", 2246 st->sc_dev.dv_xname, 2247 xs->datalen - info, xs->datalen); 2248 } 2249 retval = EIO; 2250 } else { 2251 retval = 0; 2252 if (st->blkno != (daddr_t) -1) { 2253 st->blkno++; 2254 st->flags |= ST_POSUPDATED; 2255 } 2256 } 2257 } 2258 if (bp) 2259 bp->b_resid = info; 2260 } 2261 2262 #ifndef SCSIPI_DEBUG 2263 if (retval == 0 && key == SKEY_NO_SENSE) 2264 doprint = 0; 2265 #endif 2266 if (key == SKEY_BLANK_CHECK) { 2267 /* 2268 * This quirk code helps the drive read the 2269 * first tape block, regardless of format. That 2270 * is required for these drives to return proper 2271 * MODE SENSE information. 2272 */ 2273 if ((st->quirks & ST_Q_SENSE_HELP) && 2274 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 2275 /* still starting */ 2276 st->blksize -= 512; 2277 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 2278 st->flags |= ST_BLANK_READ; 2279 xs->resid = xs->datalen; 2280 if (bp) { 2281 bp->b_resid = xs->resid; 2282 /* return an EOF */ 2283 } 2284 retval = 0; 2285 /* lost position */ 2286 st->fileno = st->blkno = -1; 2287 } 2288 } 2289 2290 /* 2291 * If generic sense processing will continue, we should not 2292 * print sense info here. 2293 */ 2294 if (retval == EJUSTRETURN) 2295 doprint = 0; 2296 2297 if (doprint) { 2298 #ifdef SCSIVERBOSE 2299 scsipi_print_sense(xs, 0); 2300 #else 2301 scsipi_printaddr(periph); 2302 printf("Sense Key 0x%02x", key); 2303 if ((sense->error_code & SSD_ERRCODE_VALID) != 0) { 2304 switch (key) { 2305 case SKEY_NOT_READY: 2306 case SKEY_ILLEGAL_REQUEST: 2307 case SKEY_UNIT_ATTENTION: 2308 case SKEY_WRITE_PROTECT: 2309 break; 2310 case SKEY_VOLUME_OVERFLOW: 2311 case SKEY_BLANK_CHECK: 2312 printf(", requested size: %d (decimal)", info); 2313 break; 2314 case SKEY_ABORTED_COMMAND: 2315 if (xs->xs_retries) 2316 printf(", retrying"); 2317 printf(", cmd 0x%x, info 0x%x", 2318 xs->cmd->opcode, info); 2319 break; 2320 default: 2321 printf(", info = %d (decimal)", info); 2322 } 2323 } 2324 if (sense->extra_len != 0) { 2325 int n; 2326 printf(", data ="); 2327 for (n = 0; n < sense->extra_len; n++) 2328 printf(" %02x", sense->cmd_spec_info[n]); 2329 } 2330 printf("\n"); 2331 #endif 2332 } 2333 return (retval); 2334 } 2335 2336 /* 2337 * The quirk here is that the drive returns some value to st_mode_sense 2338 * incorrectly until the tape has actually passed by the head. 2339 * 2340 * The method is to set the drive to large fixed-block state (user-specified 2341 * density and 1024-byte blocks), then read and rewind to get it to sense the 2342 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 2343 * work, as a last resort, try variable- length blocks. The result will be 2344 * the ability to do an accurate st_mode_sense. 2345 * 2346 * We know we can do a rewind because we just did a load, which implies rewind. 2347 * Rewind seems preferable to space backward if we have a virgin tape. 2348 * 2349 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 2350 * error processing, both part of st_interpret_sense. 2351 */ 2352 int 2353 st_touch_tape(st) 2354 struct st_softc *st; 2355 { 2356 char *buf; 2357 int readsize; 2358 int error; 2359 2360 buf = malloc(1024, M_TEMP, M_NOWAIT); 2361 if (buf == NULL) 2362 return (ENOMEM); 2363 2364 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 2365 goto bad; 2366 2367 /* 2368 * If the block size is already known from the 2369 * sense data, use it. Else start probing at 1024. 2370 */ 2371 if (st->media_blksize > 0) 2372 st->blksize = st->media_blksize; 2373 else 2374 st->blksize = 1024; 2375 2376 do { 2377 switch (st->blksize) { 2378 case 512: 2379 case 1024: 2380 readsize = st->blksize; 2381 st->flags |= ST_FIXEDBLOCKS; 2382 break; 2383 default: 2384 readsize = 1; 2385 st->flags &= ~ST_FIXEDBLOCKS; 2386 } 2387 if ((error = st->ops(st, ST_OPS_MODESELECT, XS_CTL_SILENT)) 2388 != 0) { 2389 /* 2390 * The device did not agree with the proposed 2391 * block size. If we exhausted our options, 2392 * return failure, else try another. 2393 */ 2394 if (readsize == 1) 2395 goto bad; 2396 st->blksize -= 512; 2397 continue; 2398 } 2399 st_read(st, buf, readsize, XS_CTL_SILENT); /* XXX */ 2400 if ((error = st_rewind(st, 0, 0)) != 0) { 2401 bad: free(buf, M_TEMP); 2402 return (error); 2403 } 2404 } while (readsize != 1 && readsize > st->blksize); 2405 2406 free(buf, M_TEMP); 2407 return (0); 2408 } 2409 2410 int 2411 stdump(dev, blkno, va, size) 2412 dev_t dev; 2413 daddr_t blkno; 2414 caddr_t va; 2415 size_t size; 2416 { 2417 2418 /* Not implemented. */ 2419 return (ENXIO); 2420 } 2421