1 /* $NetBSD: st.c,v 1.163 2003/06/29 22:30:45 fvdl 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 1.163 2003/06/29 22:30:45 fvdl 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, nokqfilter, 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 {{T_SEQUENTIAL, T_REMOV, 147 "TANDBERG", " SLR5 4/8GB ", ""}, {0, 0, { 148 {ST_Q_FORCE_BLKSIZE, 1024, 0}, /* minor 0-3 */ 149 {0, 0, 0}, /* minor 4-7 */ 150 {0, 0, 0}, /* minor 8-11 */ 151 {0, 0, 0} /* minor 12-15 */ 152 }}}, 153 /* 154 * lacking a manual for the 4200, it's not clear what the 155 * specific density codes should be- the device is a 2.5GB 156 * capable QIC drive, those density codes aren't readily 157 * availabel. The 'default' will just have to do. 158 */ 159 {{T_SEQUENTIAL, T_REMOV, 160 "TANDBERG", " TDC 4200 ", ""}, {0, 0, { 161 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 162 {0, 0, QIC_525}, /* minor 4-7 */ 163 {0, 0, QIC_150}, /* minor 8-11 */ 164 {0, 0, QIC_120} /* minor 12-15 */ 165 }}}, 166 /* 167 * At least -005 and -007 need this. I'll assume they all do unless I 168 * hear otherwise. - mycroft, 31MAR1994 169 */ 170 {{T_SEQUENTIAL, T_REMOV, 171 "ARCHIVE ", "VIPER 2525 25462", ""}, {0, 0, { 172 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 173 {ST_Q_SENSE_HELP, 0, QIC_525}, /* minor 4-7 */ 174 {0, 0, QIC_150}, /* minor 8-11 */ 175 {0, 0, QIC_120} /* minor 12-15 */ 176 }}}, 177 /* 178 * One user reports that this works for his tape drive. It probably 179 * needs more work. - mycroft, 09APR1994 180 */ 181 {{T_SEQUENTIAL, T_REMOV, 182 "SANKYO ", "CP525 ", ""}, {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 "ANRITSU ", "DMT780 ", ""}, {0, 0, { 190 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 191 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 192 {0, 0, QIC_150}, /* minor 8-11 */ 193 {0, 0, QIC_120} /* minor 12-15 */ 194 }}}, 195 {{T_SEQUENTIAL, T_REMOV, 196 "ARCHIVE ", "VIPER 150 21247", ""}, {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 "ARCHIVE ", "VIPER 150 21531", ""}, {ST_Q_ERASE_NOIMM, 12, { 204 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 205 {0, 0, QIC_150}, /* minor 4-7 */ 206 {0, 0, QIC_120}, /* minor 8-11 */ 207 {0, 0, QIC_24} /* minor 12-15 */ 208 }}}, 209 {{T_SEQUENTIAL, T_REMOV, 210 "WANGTEK ", "5099ES SCSI", ""}, {0, 0, { 211 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 212 {0, 0, QIC_11}, /* minor 4-7 */ 213 {0, 0, QIC_24}, /* minor 8-11 */ 214 {0, 0, QIC_24} /* minor 12-15 */ 215 }}}, 216 {{T_SEQUENTIAL, T_REMOV, 217 "WANGTEK ", "5150ES SCSI", ""}, {0, 0, { 218 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 219 {0, 0, QIC_24}, /* minor 4-7 */ 220 {0, 0, QIC_120}, /* minor 8-11 */ 221 {0, 0, QIC_150} /* minor 12-15 */ 222 }}}, 223 {{T_SEQUENTIAL, T_REMOV, 224 "WANGTEK ", "5525ES SCSI REV7", ""}, {0, 0, { 225 {0, 0, 0}, /* minor 0-3 */ 226 {ST_Q_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 227 {0, 0, QIC_150}, /* minor 8-11 */ 228 {0, 0, QIC_120} /* minor 12-15 */ 229 }}}, 230 {{T_SEQUENTIAL, T_REMOV, 231 "WangDAT ", "Model 1300 ", ""}, {0, 0, { 232 {0, 0, 0}, /* minor 0-3 */ 233 {ST_Q_FORCE_BLKSIZE, 512, DDS}, /* minor 4-7 */ 234 {ST_Q_FORCE_BLKSIZE, 1024, DDS}, /* minor 8-11 */ 235 {ST_Q_FORCE_BLKSIZE, 0, DDS} /* minor 12-15 */ 236 }}}, 237 {{T_SEQUENTIAL, T_REMOV, 238 "EXABYTE ", "EXB-8200 ", "263H"}, {0, 5, { 239 {0, 0, 0}, /* minor 0-3 */ 240 {0, 0, 0}, /* minor 4-7 */ 241 {0, 0, 0}, /* minor 8-11 */ 242 {0, 0, 0} /* minor 12-15 */ 243 }}}, 244 {{T_SEQUENTIAL, T_REMOV, 245 "STK", "9490", ""}, 246 {ST_Q_FORCE_BLKSIZE, 0, { 247 {0, 0, 0}, /* minor 0-3 */ 248 {0, 0, 0}, /* minor 4-7 */ 249 {0, 0, 0}, /* minor 8-11 */ 250 {0, 0, 0} /* minor 12-15 */ 251 }}}, 252 {{T_SEQUENTIAL, T_REMOV, 253 "STK", "SD-3", ""}, 254 {ST_Q_FORCE_BLKSIZE, 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 "IBM", "03590", ""}, {ST_Q_IGNORE_LOADS, 0, { 262 {0, 0, 0}, /* minor 0-3 */ 263 {0, 0, 0}, /* minor 4-7 */ 264 {0, 0, 0}, /* minor 8-11 */ 265 {0, 0, 0} /* minor 12-15 */ 266 }}}, 267 {{T_SEQUENTIAL, T_REMOV, 268 "HP ", "T4000s ", ""}, {ST_Q_UNIMODAL, 0, { 269 {0, 0, QIC_3095}, /* minor 0-3 */ 270 {0, 0, QIC_3095}, /* minor 4-7 */ 271 {0, 0, QIC_3095}, /* minor 8-11 */ 272 {0, 0, QIC_3095}, /* minor 12-15 */ 273 }}}, 274 #if 0 275 {{T_SEQUENTIAL, T_REMOV, 276 "EXABYTE ", "EXB-8200 ", ""}, {0, 12, { 277 {0, 0, 0}, /* minor 0-3 */ 278 {0, 0, 0}, /* minor 4-7 */ 279 {0, 0, 0}, /* minor 8-11 */ 280 {0, 0, 0} /* minor 12-15 */ 281 }}}, 282 #endif 283 {{T_SEQUENTIAL, T_REMOV, 284 "TEAC ", "MT-2ST/N50 ", ""}, {ST_Q_IGNORE_LOADS, 0, { 285 {0, 0, 0}, /* minor 0-3 */ 286 {0, 0, 0}, /* minor 4-7 */ 287 {0, 0, 0}, /* minor 8-11 */ 288 {0, 0, 0} /* minor 12-15 */ 289 }}}, 290 {{T_SEQUENTIAL, T_REMOV, 291 "OnStream", "ADR50 Drive", ""}, {ST_Q_UNIMODAL, 0, { 292 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 293 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 4-7 */ 294 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 8-11 */ 295 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 12-15 */ 296 }}}, 297 {{T_SEQUENTIAL, T_REMOV, 298 "OnStream DI-30", "", "1.0"}, {ST_Q_NOFILEMARKS, 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 {{T_SEQUENTIAL, T_REMOV, 305 "NCR H621", "0-STD-03-46F880 ", ""}, {ST_Q_NOPREVENT, 0, { 306 {0, 0, 0}, /* minor 0-3 */ 307 {0, 0, 0}, /* minor 4-7 */ 308 {0, 0, 0}, /* minor 8-11 */ 309 {0, 0, 0} /* minor 12-15 */ 310 }}}, 311 }; 312 313 #define NOEJECT 0 314 #define EJECT 1 315 316 void st_identify_drive __P((struct st_softc *, 317 struct scsipi_inquiry_pattern *)); 318 void st_loadquirks __P((struct st_softc *)); 319 int st_mount_tape __P((dev_t, int)); 320 void st_unmount __P((struct st_softc *, boolean)); 321 int st_decide_mode __P((struct st_softc *, boolean)); 322 void ststart __P((struct scsipi_periph *)); 323 void stdone __P((struct scsipi_xfer *)); 324 int st_read __P((struct st_softc *, char *, int, int)); 325 int st_space __P((struct st_softc *, int, u_int, int)); 326 int st_write_filemarks __P((struct st_softc *, int, int)); 327 int st_check_eod __P((struct st_softc *, boolean, int *, int)); 328 int st_load __P((struct st_softc *, u_int, int)); 329 int st_rewind __P((struct st_softc *, u_int, int)); 330 int st_interpret_sense __P((struct scsipi_xfer *)); 331 int st_touch_tape __P((struct st_softc *)); 332 int st_erase __P((struct st_softc *, int full, int flags)); 333 int st_rdpos __P((struct st_softc *, int, u_int32_t *)); 334 int st_setpos __P((struct st_softc *, int, u_int32_t *)); 335 336 const struct scsipi_periphsw st_switch = { 337 st_interpret_sense, 338 ststart, 339 NULL, 340 stdone 341 }; 342 343 #if defined(ST_ENABLE_EARLYWARN) 344 #define ST_INIT_FLAGS ST_EARLYWARN 345 #else 346 #define ST_INIT_FLAGS 0 347 #endif 348 349 /* 350 * The routine called by the low level scsi routine when it discovers 351 * A device suitable for this driver 352 */ 353 void 354 stattach(parent, st, aux) 355 struct device *parent; 356 struct st_softc *st; 357 void *aux; 358 { 359 struct scsipibus_attach_args *sa = aux; 360 struct scsipi_periph *periph = sa->sa_periph; 361 362 SC_DEBUG(periph, SCSIPI_DB2, ("stattach: ")); 363 364 /* 365 * Store information needed to contact our base driver 366 */ 367 st->sc_periph = periph; 368 periph->periph_dev = &st->sc_dev; 369 periph->periph_switch = &st_switch; 370 371 /* 372 * Set initial flags 373 */ 374 375 st->flags = ST_INIT_FLAGS; 376 377 /* 378 * Set up the buf queue for this device 379 */ 380 bufq_alloc(&st->buf_queue, BUFQ_FCFS); 381 382 /* 383 * Check if the drive is a known criminal and take 384 * Any steps needed to bring it into line 385 */ 386 st_identify_drive(st, &sa->sa_inqbuf); 387 /* 388 * Use the subdriver to request information regarding the drive. 389 */ 390 printf("\n"); 391 printf("%s: %s", st->sc_dev.dv_xname, st->quirkdata ? "rogue, " : ""); 392 if (scsipi_test_unit_ready(periph, 393 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE) || 394 st->ops(st, ST_OPS_MODESENSE, 395 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE)) 396 printf("drive empty\n"); 397 else { 398 printf("density code %d, ", st->media_density); 399 if (st->media_blksize > 0) 400 printf("%d-byte", st->media_blksize); 401 else 402 printf("variable"); 403 printf(" blocks, write-%s\n", 404 (st->flags & ST_READONLY) ? "protected" : "enabled"); 405 } 406 407 #if NRND > 0 408 rnd_attach_source(&st->rnd_source, st->sc_dev.dv_xname, 409 RND_TYPE_TAPE, 0); 410 #endif 411 } 412 413 int 414 stactivate(self, act) 415 struct device *self; 416 enum devact act; 417 { 418 int rv = 0; 419 420 switch (act) { 421 case DVACT_ACTIVATE: 422 rv = EOPNOTSUPP; 423 break; 424 425 case DVACT_DEACTIVATE: 426 /* 427 * Nothing to do; we key off the device's DVF_ACTIVE. 428 */ 429 break; 430 } 431 return (rv); 432 } 433 434 int 435 stdetach(self, flags) 436 struct device *self; 437 int flags; 438 { 439 struct st_softc *st = (struct st_softc *)self; 440 struct buf *bp; 441 int s, bmaj, cmaj, mn; 442 443 /* locate the major number */ 444 bmaj = bdevsw_lookup_major(&st_bdevsw); 445 cmaj = cdevsw_lookup_major(&st_cdevsw); 446 447 s = splbio(); 448 449 /* Kill off any queued buffers. */ 450 while ((bp = BUFQ_GET(&st->buf_queue)) != NULL) { 451 bp->b_error = EIO; 452 bp->b_flags |= B_ERROR; 453 bp->b_resid = bp->b_bcount; 454 biodone(bp); 455 } 456 457 bufq_free(&st->buf_queue); 458 459 /* Kill off any pending commands. */ 460 scsipi_kill_pending(st->sc_periph); 461 462 splx(s); 463 464 /* Nuke the vnodes for any open instances */ 465 mn = STUNIT(self->dv_unit); 466 vdevgone(bmaj, mn, mn+STNMINOR-1, VBLK); 467 vdevgone(cmaj, mn, mn+STNMINOR-1, VCHR); 468 469 470 #if NRND > 0 471 /* Unhook the entropy source. */ 472 rnd_detach_source(&st->rnd_source); 473 #endif 474 475 return (0); 476 } 477 478 /* 479 * Use the inquiry routine in 'scsi_base' to get drive info so we can 480 * Further tailor our behaviour. 481 */ 482 void 483 st_identify_drive(st, inqbuf) 484 struct st_softc *st; 485 struct scsipi_inquiry_pattern *inqbuf; 486 { 487 struct st_quirk_inquiry_pattern *finger; 488 int priority; 489 490 finger = (struct st_quirk_inquiry_pattern *)scsipi_inqmatch(inqbuf, 491 (caddr_t)st_quirk_patterns, 492 sizeof(st_quirk_patterns) / sizeof(st_quirk_patterns[0]), 493 sizeof(st_quirk_patterns[0]), &priority); 494 if (priority != 0) { 495 st->quirkdata = &finger->quirkdata; 496 st->drive_quirks = finger->quirkdata.quirks; 497 st->quirks = finger->quirkdata.quirks; /* start value */ 498 st->page_0_size = finger->quirkdata.page_0_size; 499 st_loadquirks(st); 500 } 501 } 502 503 /* 504 * initialise the subdevices to the default (QUIRK) state. 505 * this will remove any setting made by the system operator or previous 506 * operations. 507 */ 508 void 509 st_loadquirks(st) 510 struct st_softc *st; 511 { 512 int i; 513 struct modes *mode; 514 struct modes *mode2; 515 516 mode = st->quirkdata->modes; 517 mode2 = st->modes; 518 for (i = 0; i < 4; i++) { 519 memset(mode2, 0, sizeof(struct modes)); 520 st->modeflags[i] &= ~(BLKSIZE_SET_BY_QUIRK | 521 DENSITY_SET_BY_QUIRK | BLKSIZE_SET_BY_USER | 522 DENSITY_SET_BY_USER); 523 if ((mode->quirks | st->drive_quirks) & ST_Q_FORCE_BLKSIZE) { 524 mode2->blksize = mode->blksize; 525 st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; 526 } 527 if (mode->density) { 528 mode2->density = mode->density; 529 st->modeflags[i] |= DENSITY_SET_BY_QUIRK; 530 } 531 mode2->quirks |= mode->quirks; 532 mode++; 533 mode2++; 534 } 535 } 536 537 /* 538 * open the device. 539 */ 540 int 541 stopen(dev, flags, mode, p) 542 dev_t dev; 543 int flags; 544 int mode; 545 struct proc *p; 546 { 547 u_int stmode, dsty; 548 int error, sflags, unit, tries, ntries; 549 struct st_softc *st; 550 struct scsipi_periph *periph; 551 struct scsipi_adapter *adapt; 552 553 unit = STUNIT(dev); 554 if (unit >= st_cd.cd_ndevs) 555 return (ENXIO); 556 st = st_cd.cd_devs[unit]; 557 if (st == NULL) 558 return (ENXIO); 559 560 stmode = STMODE(dev); 561 dsty = STDSTY(dev); 562 563 periph = st->sc_periph; 564 adapt = periph->periph_channel->chan_adapter; 565 566 SC_DEBUG(periph, SCSIPI_DB1, ("open: dev=0x%x (unit %d (of %d))\n", dev, 567 unit, st_cd.cd_ndevs)); 568 569 570 /* 571 * Only allow one at a time 572 */ 573 if (periph->periph_flags & PERIPH_OPEN) { 574 printf("%s: already open\n", st->sc_dev.dv_xname); 575 return (EBUSY); 576 } 577 578 if ((error = scsipi_adapter_addref(adapt)) != 0) 579 return (error); 580 581 /* 582 * clear any latched errors. 583 */ 584 st->mt_resid = 0; 585 st->mt_erreg = 0; 586 st->asc = 0; 587 st->ascq = 0; 588 589 /* 590 * Catch any unit attention errors. Be silent about this 591 * unless we're already mounted. We ignore media change 592 * if we're in control mode or not mounted yet. 593 */ 594 if ((st->flags & ST_MOUNTED) == 0 || stmode == CTRL_MODE) { 595 #ifdef SCSIDEBUG 596 sflags = XS_CTL_IGNORE_MEDIA_CHANGE; 597 #else 598 sflags = XS_CTL_SILENT|XS_CTL_IGNORE_MEDIA_CHANGE; 599 #endif 600 } else 601 sflags = 0; 602 603 /* 604 * If we're already mounted or we aren't configured for 605 * a mount delay, only try a test unit ready once. Otherwise, 606 * try up to ST_MOUNT_DELAY times with a rest interval of 607 * one second between each try. 608 */ 609 610 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0) { 611 ntries = 1; 612 } else { 613 ntries = ST_MOUNT_DELAY; 614 } 615 616 for (error = tries = 0; tries < ntries; tries++) { 617 int slpintr, oflags; 618 619 /* 620 * If we had no error, or we're opening the control mode 621 * device, we jump out right away. 622 */ 623 624 error = scsipi_test_unit_ready(periph, sflags); 625 if (error == 0 || stmode == CTRL_MODE) { 626 break; 627 } 628 629 /* 630 * We had an error. 631 * 632 * If we're already mounted or we aren't configured for 633 * a mount delay, or the error isn't a NOT READY error, 634 * skip to the error exit now. 635 */ 636 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0 || 637 (st->mt_key != SKEY_NOT_READY)) { 638 goto bad; 639 } 640 641 /* 642 * clear any latched errors. 643 */ 644 st->mt_resid = 0; 645 st->mt_erreg = 0; 646 st->asc = 0; 647 st->ascq = 0; 648 649 /* 650 * Fake that we have the device open so 651 * we block other apps from getting in. 652 */ 653 654 oflags = periph->periph_flags; 655 periph->periph_flags |= PERIPH_OPEN; 656 657 slpintr = tsleep(&lbolt, PUSER|PCATCH, "stload", 0); 658 659 periph->periph_flags = oflags; /* restore flags */ 660 if (slpintr) { 661 goto bad; 662 } 663 } 664 665 666 /* 667 * If the mode is 3 (e.g. minor = 3,7,11,15) then the device has 668 * been opened to set defaults and perform other, usually non-I/O 669 * related, operations. In this case, do a quick check to see 670 * whether the unit actually had a tape loaded (this will be known 671 * as to whether or not we got a NOT READY for the above 672 * unit attention). If a tape is there, go do a mount sequence. 673 */ 674 if (stmode == CTRL_MODE && st->mt_key == SKEY_NOT_READY) { 675 periph->periph_flags |= PERIPH_OPEN; 676 return (0); 677 } 678 679 /* 680 * If we get this far and had an error set, that means we failed 681 * to pass the 'test unit ready' test for the non-controlmode device, 682 * so we bounce the open. 683 */ 684 685 if (error) 686 return (error); 687 688 /* 689 * Else, we're now committed to saying we're open. 690 */ 691 692 periph->periph_flags |= PERIPH_OPEN; /* unit attn are now errors */ 693 694 /* 695 * If it's a different mode, or if the media has been 696 * invalidated, unmount the tape from the previous 697 * session but continue with open processing 698 */ 699 if (st->last_dsty != dsty || 700 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 701 st_unmount(st, NOEJECT); 702 703 /* 704 * If we are not mounted, then we should start a new 705 * mount session. 706 */ 707 if (!(st->flags & ST_MOUNTED)) { 708 if ((error = st_mount_tape(dev, flags)) != 0) 709 goto bad; 710 st->last_dsty = dsty; 711 } 712 if (!(st->quirks & ST_Q_NOPREVENT)) { 713 scsipi_prevent(periph, PR_PREVENT, 714 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 715 } 716 717 SC_DEBUG(periph, SCSIPI_DB2, ("open complete\n")); 718 return (0); 719 720 bad: 721 st_unmount(st, NOEJECT); 722 scsipi_adapter_delref(adapt); 723 periph->periph_flags &= ~PERIPH_OPEN; 724 return (error); 725 } 726 727 /* 728 * close the device.. only called if we are the LAST 729 * occurence of an open device 730 */ 731 int 732 stclose(dev, flags, mode, p) 733 dev_t dev; 734 int flags; 735 int mode; 736 struct proc *p; 737 { 738 int stxx, error = 0; 739 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 740 struct scsipi_periph *periph = st->sc_periph; 741 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 742 743 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("closing\n")); 744 745 /* 746 * Make sure that a tape opened in write-only mode will have 747 * file marks written on it when closed, even if not written to. 748 * 749 * This is for SUN compatibility. Actually, the Sun way of 750 * things is to: 751 * 752 * only write filemarks if there are fmks to be written and 753 * - open for write (possibly read/write) 754 * - the last operation was a write 755 * or: 756 * - opened for wronly 757 * - no data was written (including filemarks) 758 */ 759 760 stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); 761 if (((flags & FWRITE) && stxx == ST_WRITTEN) || 762 ((flags & O_ACCMODE) == FWRITE && stxx == 0)) { 763 int nm; 764 error = st_check_eod(st, FALSE, &nm, 0); 765 } 766 767 /* 768 * Allow robots to eject tape if needed. 769 */ 770 scsipi_prevent(periph, PR_ALLOW, 771 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 772 773 switch (STMODE(dev)) { 774 case NORMAL_MODE: 775 st_unmount(st, NOEJECT); 776 break; 777 case NOREW_MODE: 778 case CTRL_MODE: 779 /* 780 * Leave mounted unless media seems to have been removed. 781 * 782 * Otherwise, if we're to terminate a tape with more than one 783 * filemark [ and because we're not rewinding here ], backspace 784 * one filemark so that later appends will see an unbroken 785 * sequence of: 786 * 787 * file - FMK - file - FMK ... file - FMK FMK (EOM) 788 */ 789 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 790 st_unmount(st, NOEJECT); 791 } else if (error == 0) { 792 /* 793 * ST_WRITTEN was preserved from above. 794 * 795 * All we need to know here is: 796 * 797 * Were we writing this tape and was the last 798 * operation a write? 799 * 800 * Are there supposed to be 2FM at EOD? 801 * 802 * If both statements are true, then we backspace 803 * one filemark. 804 */ 805 stxx |= (st->flags & ST_2FM_AT_EOD); 806 if ((flags & FWRITE) != 0 && 807 (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { 808 error = st_space(st, -1, SP_FILEMARKS, 0); 809 } 810 } 811 break; 812 case EJECT_MODE: 813 st_unmount(st, EJECT); 814 break; 815 } 816 817 scsipi_wait_drain(periph); 818 819 scsipi_adapter_delref(adapt); 820 periph->periph_flags &= ~PERIPH_OPEN; 821 822 return (error); 823 } 824 825 /* 826 * Start a new mount session. 827 * Copy in all the default parameters from the selected device mode. 828 * and try guess any that seem to be defaulted. 829 */ 830 int 831 st_mount_tape(dev, flags) 832 dev_t dev; 833 int flags; 834 { 835 int unit; 836 u_int dsty; 837 struct st_softc *st; 838 struct scsipi_periph *periph; 839 int error = 0; 840 841 unit = STUNIT(dev); 842 dsty = STDSTY(dev); 843 st = st_cd.cd_devs[unit]; 844 periph = st->sc_periph; 845 846 if (st->flags & ST_MOUNTED) 847 return (0); 848 849 SC_DEBUG(periph, SCSIPI_DB1, ("mounting\n ")); 850 st->flags |= ST_NEW_MOUNT; 851 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 852 /* 853 * If the media is new, then make sure we give it a chance to 854 * to do a 'load' instruction. (We assume it is new.) 855 */ 856 if ((error = st_load(st, LD_LOAD, XS_CTL_SILENT)) != 0) 857 return (error); 858 /* 859 * Throw another dummy instruction to catch 860 * 'Unit attention' errors. Many drives give 861 * these after doing a Load instruction (with 862 * the MEDIUM MAY HAVE CHANGED asc/ascq). 863 */ 864 scsipi_test_unit_ready(periph, XS_CTL_SILENT); /* XXX */ 865 866 /* 867 * Some devices can't tell you much until they have been 868 * asked to look at the media. This quirk does this. 869 */ 870 if (st->quirks & ST_Q_SENSE_HELP) 871 if ((error = st_touch_tape(st)) != 0) 872 return (error); 873 /* 874 * Load the physical device parameters 875 * loads: blkmin, blkmax 876 */ 877 if ((error = st->ops(st, ST_OPS_RBL, 0)) != 0) 878 return (error); 879 /* 880 * Load the media dependent parameters 881 * includes: media_blksize,media_density,numblks 882 * As we have a tape in, it should be reflected here. 883 * If not you may need the "quirk" above. 884 */ 885 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 886 return (error); 887 /* 888 * If we have gained a permanent density from somewhere, 889 * then use it in preference to the one supplied by 890 * default by the driver. 891 */ 892 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 893 st->density = st->modes[dsty].density; 894 else 895 st->density = st->media_density; 896 /* 897 * If we have gained a permanent blocksize 898 * then use it in preference to the one supplied by 899 * default by the driver. 900 */ 901 st->flags &= ~ST_FIXEDBLOCKS; 902 if (st->modeflags[dsty] & 903 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 904 st->blksize = st->modes[dsty].blksize; 905 if (st->blksize) 906 st->flags |= ST_FIXEDBLOCKS; 907 } else { 908 if ((error = st_decide_mode(st, FALSE)) != 0) 909 return (error); 910 } 911 if ((error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 912 /* ATAPI will return ENODEV for this, and this may be OK */ 913 if (error != ENODEV) { 914 printf("%s: cannot set selected mode\n", 915 st->sc_dev.dv_xname); 916 return (error); 917 } 918 } 919 st->flags &= ~ST_NEW_MOUNT; 920 st->flags |= ST_MOUNTED; 921 periph->periph_flags |= PERIPH_MEDIA_LOADED; /* move earlier? */ 922 st->blkno = st->fileno = (daddr_t) 0; 923 return (0); 924 } 925 926 /* 927 * End the present mount session. 928 * Rewind, and optionally eject the tape. 929 * Reset various flags to indicate that all new 930 * operations require another mount operation 931 */ 932 void 933 st_unmount(st, eject) 934 struct st_softc *st; 935 boolean eject; 936 { 937 struct scsipi_periph *periph = st->sc_periph; 938 int nmarks; 939 940 if ((st->flags & ST_MOUNTED) == 0) 941 return; 942 SC_DEBUG(periph, SCSIPI_DB1, ("unmounting\n")); 943 st_check_eod(st, FALSE, &nmarks, XS_CTL_IGNORE_NOT_READY); 944 st_rewind(st, 0, XS_CTL_IGNORE_NOT_READY); 945 946 /* 947 * Section 9.3.3 of the SCSI specs states that a device shall return 948 * the density value specified in the last succesfull MODE SELECT 949 * after an unload operation, in case it is not able to 950 * automatically determine the density of the new medium. 951 * 952 * So we instruct the device to use the default density, which will 953 * prevent the use of stale density values (in particular, 954 * in st_touch_tape(). 955 */ 956 st->density = 0; 957 if (st->ops(st, ST_OPS_MODESELECT, 0) != 0) { 958 printf("%s: WARNING: cannot revert to default density\n", 959 st->sc_dev.dv_xname); 960 } 961 962 if (eject) { 963 if (!(st->quirks & ST_Q_NOPREVENT)) { 964 scsipi_prevent(periph, PR_ALLOW, 965 XS_CTL_IGNORE_ILLEGAL_REQUEST | 966 XS_CTL_IGNORE_NOT_READY); 967 } 968 st_load(st, LD_UNLOAD, XS_CTL_IGNORE_NOT_READY); 969 st->blkno = st->fileno = (daddr_t) -1; 970 } else { 971 st->blkno = st->fileno = (daddr_t) 0; 972 } 973 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 974 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 975 } 976 977 /* 978 * Given all we know about the device, media, mode, 'quirks' and 979 * initial operation, make a decision as to how we should be set 980 * to run (regarding blocking and EOD marks) 981 */ 982 int 983 st_decide_mode(st, first_read) 984 struct st_softc *st; 985 boolean first_read; 986 { 987 988 SC_DEBUG(st->sc_periph, SCSIPI_DB2, ("starting block mode decision\n")); 989 990 /* 991 * If the drive can only handle fixed-length blocks and only at 992 * one size, perhaps we should just do that. 993 */ 994 if (st->blkmin && (st->blkmin == st->blkmax)) { 995 st->flags |= ST_FIXEDBLOCKS; 996 st->blksize = st->blkmin; 997 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 998 ("blkmin == blkmax of %d\n", st->blkmin)); 999 goto done; 1000 } 1001 /* 1002 * If the tape density mandates (or even suggests) use of fixed 1003 * or variable-length blocks, comply. 1004 */ 1005 switch (st->density) { 1006 case HALFINCH_800: 1007 case HALFINCH_1600: 1008 case HALFINCH_6250: 1009 case DDS: 1010 st->flags &= ~ST_FIXEDBLOCKS; 1011 st->blksize = 0; 1012 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1013 ("density specified variable\n")); 1014 goto done; 1015 case QIC_11: 1016 case QIC_24: 1017 case QIC_120: 1018 case QIC_150: 1019 case QIC_525: 1020 case QIC_1320: 1021 case QIC_3095: 1022 case QIC_3220: 1023 st->flags |= ST_FIXEDBLOCKS; 1024 if (st->media_blksize > 0) 1025 st->blksize = st->media_blksize; 1026 else 1027 st->blksize = DEF_FIXED_BSIZE; 1028 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1029 ("density specified fixed\n")); 1030 goto done; 1031 } 1032 /* 1033 * If we're about to read the tape, perhaps we should choose 1034 * fixed or variable-length blocks and block size according to 1035 * what the drive found on the tape. 1036 */ 1037 if (first_read && 1038 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 1039 (st->media_blksize == DEF_FIXED_BSIZE) || 1040 (st->media_blksize == 1024))) { 1041 if (st->media_blksize > 0) 1042 st->flags |= ST_FIXEDBLOCKS; 1043 else 1044 st->flags &= ~ST_FIXEDBLOCKS; 1045 st->blksize = st->media_blksize; 1046 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1047 ("Used media_blksize of %d\n", st->media_blksize)); 1048 goto done; 1049 } 1050 /* 1051 * We're getting no hints from any direction. Choose variable- 1052 * length blocks arbitrarily. 1053 */ 1054 st->flags &= ~ST_FIXEDBLOCKS; 1055 st->blksize = 0; 1056 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1057 ("Give up and default to variable mode\n")); 1058 1059 done: 1060 /* 1061 * Decide whether or not to write two file marks to signify end- 1062 * of-data. Make the decision as a function of density. If 1063 * the decision is not to use a second file mark, the SCSI BLANK 1064 * CHECK condition code will be recognized as end-of-data when 1065 * first read. 1066 * (I think this should be a by-product of fixed/variable..julian) 1067 */ 1068 switch (st->density) { 1069 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 1070 case QIC_11: 1071 case QIC_24: 1072 case QIC_120: 1073 case QIC_150: 1074 case QIC_525: 1075 case QIC_1320: 1076 case QIC_3095: 1077 case QIC_3220: 1078 st->flags &= ~ST_2FM_AT_EOD; 1079 break; 1080 default: 1081 st->flags |= ST_2FM_AT_EOD; 1082 } 1083 return (0); 1084 } 1085 1086 /* 1087 * Actually translate the requested transfer into 1088 * one the physical driver can understand 1089 * The transfer is described by a buf and will include 1090 * only one physical transfer. 1091 */ 1092 void 1093 ststrategy(bp) 1094 struct buf *bp; 1095 { 1096 struct st_softc *st = st_cd.cd_devs[STUNIT(bp->b_dev)]; 1097 int s; 1098 1099 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1100 ("ststrategy %ld bytes @ blk %" PRId64 "\n", bp->b_bcount, bp->b_blkno)); 1101 /* 1102 * If it's a null transfer, return immediatly 1103 */ 1104 if (bp->b_bcount == 0) 1105 goto done; 1106 1107 /* If offset is negative, error */ 1108 if (bp->b_blkno < 0) { 1109 bp->b_error = EINVAL; 1110 goto bad; 1111 } 1112 1113 /* 1114 * Odd sized request on fixed drives are verboten 1115 */ 1116 if (st->flags & ST_FIXEDBLOCKS) { 1117 if (bp->b_bcount % st->blksize) { 1118 printf("%s: bad request, must be multiple of %d\n", 1119 st->sc_dev.dv_xname, st->blksize); 1120 bp->b_error = EIO; 1121 goto bad; 1122 } 1123 } 1124 /* 1125 * as are out-of-range requests on variable drives. 1126 */ 1127 else if (bp->b_bcount < st->blkmin || 1128 (st->blkmax && bp->b_bcount > st->blkmax)) { 1129 printf("%s: bad request, must be between %d and %d\n", 1130 st->sc_dev.dv_xname, st->blkmin, st->blkmax); 1131 bp->b_error = EIO; 1132 goto bad; 1133 } 1134 s = splbio(); 1135 1136 /* 1137 * Place it in the queue of activities for this tape 1138 * at the end (a bit silly because we only have on user.. 1139 * (but it could fork())) 1140 */ 1141 BUFQ_PUT(&st->buf_queue, bp); 1142 1143 /* 1144 * Tell the device to get going on the transfer if it's 1145 * not doing anything, otherwise just wait for completion 1146 * (All a bit silly if we're only allowing 1 open but..) 1147 */ 1148 ststart(st->sc_periph); 1149 1150 splx(s); 1151 return; 1152 bad: 1153 bp->b_flags |= B_ERROR; 1154 done: 1155 /* 1156 * Correctly set the buf to indicate a completed xfer 1157 */ 1158 bp->b_resid = bp->b_bcount; 1159 biodone(bp); 1160 return; 1161 } 1162 1163 /* 1164 * ststart looks to see if there is a buf waiting for the device 1165 * and that the device is not already busy. If both are true, 1166 * It dequeues the buf and creates a scsi command to perform the 1167 * transfer required. The transfer request will call scsipi_done 1168 * on completion, which will in turn call this routine again 1169 * so that the next queued transfer is performed. 1170 * The bufs are queued by the strategy routine (ststrategy) 1171 * 1172 * This routine is also called after other non-queued requests 1173 * have been made of the scsi driver, to ensure that the queue 1174 * continues to be drained. 1175 * ststart() is called at splbio 1176 */ 1177 void 1178 ststart(periph) 1179 struct scsipi_periph *periph; 1180 { 1181 struct st_softc *st = (void *)periph->periph_dev; 1182 struct buf *bp; 1183 struct scsi_rw_tape cmd; 1184 int flags, error; 1185 1186 SC_DEBUG(periph, SCSIPI_DB2, ("ststart ")); 1187 /* 1188 * See if there is a buf to do and we are not already 1189 * doing one 1190 */ 1191 while (periph->periph_active < periph->periph_openings) { 1192 /* if a special awaits, let it proceed first */ 1193 if (periph->periph_flags & PERIPH_WAITING) { 1194 periph->periph_flags &= ~PERIPH_WAITING; 1195 wakeup((caddr_t)periph); 1196 return; 1197 } 1198 1199 if ((bp = BUFQ_GET(&st->buf_queue)) == NULL) 1200 return; 1201 1202 /* 1203 * If the device has been unmounted by the user 1204 * then throw away all requests until done. 1205 */ 1206 if ((st->flags & ST_MOUNTED) == 0 || 1207 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 1208 /* make sure that one implies the other.. */ 1209 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 1210 bp->b_flags |= B_ERROR; 1211 bp->b_error = EIO; 1212 bp->b_resid = bp->b_bcount; 1213 biodone(bp); 1214 continue; 1215 } 1216 /* 1217 * only FIXEDBLOCK devices have pending I/O or space operations. 1218 */ 1219 if (st->flags & ST_FIXEDBLOCKS) { 1220 /* 1221 * If we are at a filemark but have not reported it yet 1222 * then we should report it now 1223 */ 1224 if (st->flags & ST_AT_FILEMARK) { 1225 if ((bp->b_flags & B_READ) == B_WRITE) { 1226 /* 1227 * Handling of ST_AT_FILEMARK in 1228 * st_space will fill in the right file 1229 * mark count. 1230 * Back up over filemark 1231 */ 1232 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1233 bp->b_flags |= B_ERROR; 1234 bp->b_error = EIO; 1235 biodone(bp); 1236 continue; 1237 } 1238 } else { 1239 bp->b_resid = bp->b_bcount; 1240 bp->b_error = 0; 1241 bp->b_flags &= ~B_ERROR; 1242 st->flags &= ~ST_AT_FILEMARK; 1243 biodone(bp); 1244 continue; /* seek more work */ 1245 } 1246 } 1247 } 1248 /* 1249 * If we are at EOM but have not reported it 1250 * yet then we should report it now. 1251 */ 1252 if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { 1253 bp->b_resid = bp->b_bcount; 1254 if (st->flags & ST_EIO_PENDING) { 1255 bp->b_error = EIO; 1256 bp->b_flags |= B_ERROR; 1257 } 1258 st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); 1259 biodone(bp); 1260 continue; /* seek more work */ 1261 } 1262 1263 /* 1264 * Fill out the scsi command 1265 */ 1266 memset(&cmd, 0, sizeof(cmd)); 1267 flags = XS_CTL_NOSLEEP | XS_CTL_ASYNC; 1268 if ((bp->b_flags & B_READ) == B_WRITE) { 1269 cmd.opcode = WRITE; 1270 st->flags &= ~ST_FM_WRITTEN; 1271 flags |= XS_CTL_DATA_OUT; 1272 } else { 1273 cmd.opcode = READ; 1274 flags |= XS_CTL_DATA_IN; 1275 } 1276 1277 /* 1278 * Handle "fixed-block-mode" tape drives by using the 1279 * block count instead of the length. 1280 */ 1281 if (st->flags & ST_FIXEDBLOCKS) { 1282 cmd.byte2 |= SRW_FIXED; 1283 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1284 } else 1285 _lto3b(bp->b_bcount, cmd.len); 1286 1287 /* 1288 * Clear 'position updated' indicator 1289 */ 1290 st->flags &= ~ST_POSUPDATED; 1291 1292 /* 1293 * go ask the adapter to do all this for us 1294 */ 1295 error = scsipi_command(periph, 1296 (struct scsipi_generic *)&cmd, sizeof(cmd), 1297 (u_char *)bp->b_data, bp->b_bcount, 1298 0, ST_IO_TIME, bp, flags); 1299 if (error) { 1300 printf("%s: not queued, error %d\n", 1301 st->sc_dev.dv_xname, error); 1302 } 1303 } /* go back and see if we can cram more work in.. */ 1304 } 1305 1306 void 1307 stdone(xs) 1308 struct scsipi_xfer *xs; 1309 { 1310 struct st_softc *st = (void *)xs->xs_periph->periph_dev; 1311 1312 if (xs->bp != NULL) { 1313 if ((xs->bp->b_flags & B_READ) == B_WRITE) { 1314 st->flags |= ST_WRITTEN; 1315 } else { 1316 st->flags &= ~ST_WRITTEN; 1317 } 1318 #if NRND > 0 1319 rnd_add_uint32(&st->rnd_source, xs->bp->b_blkno); 1320 #endif 1321 1322 if ((st->flags & ST_POSUPDATED) == 0) { 1323 if (xs->bp->b_flags & B_ERROR) { 1324 st->fileno = st->blkno = -1; 1325 } else if (st->blkno != -1) { 1326 if (st->flags & ST_FIXEDBLOCKS) { 1327 st->blkno += 1328 (xs->bp->b_bcount / st->blksize); 1329 } else { 1330 st->blkno++; 1331 } 1332 } 1333 } 1334 } 1335 } 1336 1337 int 1338 stread(dev, uio, iomode) 1339 dev_t dev; 1340 struct uio *uio; 1341 int iomode; 1342 { 1343 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1344 1345 return (physio(ststrategy, NULL, dev, B_READ, 1346 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1347 } 1348 1349 int 1350 stwrite(dev, uio, iomode) 1351 dev_t dev; 1352 struct uio *uio; 1353 int iomode; 1354 { 1355 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1356 1357 return (physio(ststrategy, NULL, dev, B_WRITE, 1358 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1359 } 1360 1361 /* 1362 * Perform special action on behalf of the user; 1363 * knows about the internals of this device 1364 */ 1365 int 1366 stioctl(dev, cmd, arg, flag, p) 1367 dev_t dev; 1368 u_long cmd; 1369 caddr_t arg; 1370 int flag; 1371 struct proc *p; 1372 { 1373 int error = 0; 1374 int unit; 1375 int number, nmarks, dsty; 1376 int flags; 1377 struct st_softc *st; 1378 int hold_blksize; 1379 u_int8_t hold_density; 1380 struct mtop *mt = (struct mtop *) arg; 1381 1382 /* 1383 * Find the device that the user is talking about 1384 */ 1385 flags = 0; /* give error messages, act on errors etc. */ 1386 unit = STUNIT(dev); 1387 dsty = STDSTY(dev); 1388 st = st_cd.cd_devs[unit]; 1389 hold_blksize = st->blksize; 1390 hold_density = st->density; 1391 1392 switch ((u_int) cmd) { 1393 1394 case MTIOCGET: { 1395 struct mtget *g = (struct mtget *) arg; 1396 /* 1397 * (to get the current state of READONLY) 1398 */ 1399 error = st->ops(st, ST_OPS_MODESENSE, XS_CTL_SILENT); 1400 if (error) { 1401 /* 1402 * Ignore the error if in control mode; 1403 * this is mandated by st(4). 1404 */ 1405 if (STMODE(dev) != CTRL_MODE) 1406 break; 1407 error = 0; 1408 } 1409 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("[ioctl: get status]\n")); 1410 memset(g, 0, sizeof(struct mtget)); 1411 g->mt_type = 0x7; /* Ultrix compat *//*? */ 1412 g->mt_blksiz = st->blksize; 1413 g->mt_density = st->density; 1414 g->mt_mblksiz[0] = st->modes[0].blksize; 1415 g->mt_mblksiz[1] = st->modes[1].blksize; 1416 g->mt_mblksiz[2] = st->modes[2].blksize; 1417 g->mt_mblksiz[3] = st->modes[3].blksize; 1418 g->mt_mdensity[0] = st->modes[0].density; 1419 g->mt_mdensity[1] = st->modes[1].density; 1420 g->mt_mdensity[2] = st->modes[2].density; 1421 g->mt_mdensity[3] = st->modes[3].density; 1422 g->mt_fileno = st->fileno; 1423 g->mt_blkno = st->blkno; 1424 if (st->flags & ST_READONLY) 1425 g->mt_dsreg |= MT_DS_RDONLY; 1426 if (st->flags & ST_MOUNTED) 1427 g->mt_dsreg |= MT_DS_MOUNTED; 1428 g->mt_resid = st->mt_resid; 1429 g->mt_erreg = st->mt_erreg; 1430 /* 1431 * clear latched errors. 1432 */ 1433 st->mt_resid = 0; 1434 st->mt_erreg = 0; 1435 st->asc = 0; 1436 st->ascq = 0; 1437 break; 1438 } 1439 case MTIOCTOP: { 1440 1441 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1442 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1443 mt->mt_count)); 1444 1445 /* compat: in U*x it is a short */ 1446 number = mt->mt_count; 1447 switch ((short) (mt->mt_op)) { 1448 case MTWEOF: /* write an end-of-file record */ 1449 error = st_write_filemarks(st, number, flags); 1450 break; 1451 case MTBSF: /* backward space file */ 1452 number = -number; 1453 case MTFSF: /* forward space file */ 1454 error = st_check_eod(st, FALSE, &nmarks, flags); 1455 if (!error) 1456 error = st_space(st, number - nmarks, 1457 SP_FILEMARKS, flags); 1458 break; 1459 case MTBSR: /* backward space record */ 1460 number = -number; 1461 case MTFSR: /* forward space record */ 1462 error = st_check_eod(st, TRUE, &nmarks, flags); 1463 if (!error) 1464 error = st_space(st, number, SP_BLKS, flags); 1465 break; 1466 case MTREW: /* rewind */ 1467 error = st_rewind(st, 0, flags); 1468 break; 1469 case MTOFFL: /* rewind and put the drive offline */ 1470 st_unmount(st, EJECT); 1471 break; 1472 case MTNOP: /* no operation, sets status only */ 1473 break; 1474 case MTRETEN: /* retension the tape */ 1475 error = st_load(st, LD_RETENSION, flags); 1476 if (!error) 1477 error = st_load(st, LD_LOAD, flags); 1478 break; 1479 case MTEOM: /* forward space to end of media */ 1480 error = st_check_eod(st, FALSE, &nmarks, flags); 1481 if (!error) 1482 error = st_space(st, 1, SP_EOM, flags); 1483 break; 1484 case MTCACHE: /* enable controller cache */ 1485 st->flags &= ~ST_DONTBUFFER; 1486 goto try_new_value; 1487 case MTNOCACHE: /* disable controller cache */ 1488 st->flags |= ST_DONTBUFFER; 1489 goto try_new_value; 1490 case MTERASE: /* erase volume */ 1491 error = st_erase(st, number, flags); 1492 break; 1493 case MTSETBSIZ: /* Set block size for device */ 1494 #ifdef NOTYET 1495 if (!(st->flags & ST_NEW_MOUNT)) { 1496 uprintf("re-mount tape before changing blocksize"); 1497 error = EINVAL; 1498 break; 1499 } 1500 #endif 1501 if (number == 0) 1502 st->flags &= ~ST_FIXEDBLOCKS; 1503 else { 1504 if ((st->blkmin || st->blkmax) && 1505 (number < st->blkmin || 1506 number > st->blkmax)) { 1507 error = EINVAL; 1508 break; 1509 } 1510 st->flags |= ST_FIXEDBLOCKS; 1511 } 1512 st->blksize = number; 1513 st->flags |= ST_BLOCK_SET; /*XXX */ 1514 goto try_new_value; 1515 1516 case MTSETDNSTY: /* Set density for device and mode */ 1517 /* 1518 * Any number >= 0 and <= 0xff is legal. Numbers 1519 * above 0x80 are 'vendor unique'. 1520 */ 1521 if (number < 0 || number > 255) { 1522 error = EINVAL; 1523 break; 1524 } else 1525 st->density = number; 1526 goto try_new_value; 1527 1528 case MTCMPRESS: 1529 error = st->ops(st, (number == 0) ? 1530 ST_OPS_CMPRSS_OFF : ST_OPS_CMPRSS_ON, 1531 XS_CTL_SILENT); 1532 break; 1533 1534 case MTEWARN: 1535 if (number) 1536 st->flags |= ST_EARLYWARN; 1537 else 1538 st->flags &= ~ST_EARLYWARN; 1539 break; 1540 1541 default: 1542 error = EINVAL; 1543 } 1544 break; 1545 } 1546 case MTIOCIEOT: 1547 case MTIOCEEOT: 1548 break; 1549 1550 case MTIOCRDSPOS: 1551 error = st_rdpos(st, 0, (u_int32_t *) arg); 1552 break; 1553 1554 case MTIOCRDHPOS: 1555 error = st_rdpos(st, 1, (u_int32_t *) arg); 1556 break; 1557 1558 case MTIOCSLOCATE: 1559 error = st_setpos(st, 0, (u_int32_t *) arg); 1560 break; 1561 1562 case MTIOCHLOCATE: 1563 error = st_setpos(st, 1, (u_int32_t *) arg); 1564 break; 1565 1566 1567 default: 1568 error = scsipi_do_ioctl(st->sc_periph, dev, cmd, arg, 1569 flag, p); 1570 break; 1571 } 1572 return (error); 1573 /*-----------------------------*/ 1574 try_new_value: 1575 /* 1576 * Check that the mode being asked for is aggreeable to the 1577 * drive. If not, put it back the way it was. 1578 * 1579 * If in control mode, we can make (persistent) mode changes 1580 * even if no medium is loaded (see st(4)). 1581 */ 1582 if ((STMODE(dev) != CTRL_MODE || (st->flags & ST_MOUNTED) != 0) && 1583 (error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 1584 /* put it back as it was */ 1585 printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); 1586 st->density = hold_density; 1587 st->blksize = hold_blksize; 1588 if (st->blksize) 1589 st->flags |= ST_FIXEDBLOCKS; 1590 else 1591 st->flags &= ~ST_FIXEDBLOCKS; 1592 return (error); 1593 } 1594 /* 1595 * As the drive liked it, if we are setting a new default, 1596 * set it into the structures as such. 1597 * 1598 * The means for deciding this are not finalised yet- but 1599 * if the device was opened in Control Mode, the values 1600 * are persistent now across mounts. 1601 */ 1602 if (STMODE(dev) == CTRL_MODE) { 1603 switch ((short) (mt->mt_op)) { 1604 case MTSETBSIZ: 1605 st->modes[dsty].blksize = st->blksize; 1606 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1607 break; 1608 case MTSETDNSTY: 1609 st->modes[dsty].density = st->density; 1610 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1611 break; 1612 } 1613 } 1614 return (0); 1615 } 1616 1617 /* 1618 * Do a synchronous read. 1619 */ 1620 int 1621 st_read(st, buf, size, flags) 1622 struct st_softc *st; 1623 int size; 1624 int flags; 1625 char *buf; 1626 { 1627 struct scsi_rw_tape cmd; 1628 1629 /* 1630 * If it's a null transfer, return immediatly 1631 */ 1632 if (size == 0) 1633 return (0); 1634 memset(&cmd, 0, sizeof(cmd)); 1635 cmd.opcode = READ; 1636 if (st->flags & ST_FIXEDBLOCKS) { 1637 cmd.byte2 |= SRW_FIXED; 1638 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1639 cmd.len); 1640 } else 1641 _lto3b(size, cmd.len); 1642 return (scsipi_command(st->sc_periph, 1643 (struct scsipi_generic *)&cmd, sizeof(cmd), 1644 (u_char *)buf, size, 0, ST_IO_TIME, NULL, flags | XS_CTL_DATA_IN)); 1645 } 1646 1647 /* 1648 * issue an erase command 1649 */ 1650 int 1651 st_erase(st, full, flags) 1652 struct st_softc *st; 1653 int full, flags; 1654 { 1655 int tmo; 1656 struct scsi_erase cmd; 1657 1658 /* 1659 * Full erase means set LONG bit in erase command, which asks 1660 * the drive to erase the entire unit. Without this bit, we're 1661 * asking the drive to write an erase gap. 1662 */ 1663 memset(&cmd, 0, sizeof(cmd)); 1664 cmd.opcode = ERASE; 1665 if (full) { 1666 cmd.byte2 = SE_LONG; 1667 tmo = ST_SPC_TIME; 1668 } else { 1669 tmo = ST_IO_TIME; 1670 } 1671 1672 /* 1673 * XXX We always do this asynchronously, for now, unless the device 1674 * has the ST_Q_ERASE_NOIMM quirk. How long should we wait if we 1675 * want to (eventually) to it synchronously? 1676 */ 1677 if ((st->quirks & ST_Q_ERASE_NOIMM) == 0) 1678 cmd.byte2 |= SE_IMMED; 1679 1680 return (scsipi_command(st->sc_periph, 1681 (struct scsipi_generic *)&cmd, sizeof(cmd), 1682 0, 0, ST_RETRIES, tmo, NULL, flags)); 1683 } 1684 1685 /* 1686 * skip N blocks/filemarks/seq filemarks/eom 1687 */ 1688 int 1689 st_space(st, number, what, flags) 1690 struct st_softc *st; 1691 u_int what; 1692 int flags; 1693 int number; 1694 { 1695 struct scsi_space cmd; 1696 int error; 1697 1698 switch (what) { 1699 case SP_BLKS: 1700 if (st->flags & ST_PER_ACTION) { 1701 if (number > 0) { 1702 st->flags &= ~ST_PER_ACTION; 1703 return (EIO); 1704 } else if (number < 0) { 1705 if (st->flags & ST_AT_FILEMARK) { 1706 /* 1707 * Handling of ST_AT_FILEMARK 1708 * in st_space will fill in the 1709 * right file mark count. 1710 */ 1711 error = st_space(st, 0, SP_FILEMARKS, 1712 flags); 1713 if (error) 1714 return (error); 1715 } 1716 if (st->flags & ST_BLANK_READ) { 1717 st->flags &= ~ST_BLANK_READ; 1718 return (EIO); 1719 } 1720 st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); 1721 } 1722 } 1723 break; 1724 case SP_FILEMARKS: 1725 if (st->flags & ST_EIO_PENDING) { 1726 if (number > 0) { 1727 /* pretend we just discovered the error */ 1728 st->flags &= ~ST_EIO_PENDING; 1729 return (EIO); 1730 } else if (number < 0) { 1731 /* back away from the error */ 1732 st->flags &= ~ST_EIO_PENDING; 1733 } 1734 } 1735 if (st->flags & ST_AT_FILEMARK) { 1736 st->flags &= ~ST_AT_FILEMARK; 1737 number--; 1738 } 1739 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 1740 /* back away from unwritten tape */ 1741 st->flags &= ~ST_BLANK_READ; 1742 number++; /* XXX dubious */ 1743 } 1744 break; 1745 case SP_EOM: 1746 if (st->flags & ST_EOM_PENDING) { 1747 /* we're already there */ 1748 st->flags &= ~ST_EOM_PENDING; 1749 return (0); 1750 } 1751 if (st->flags & ST_EIO_PENDING) { 1752 /* pretend we just discovered the error */ 1753 st->flags &= ~ST_EIO_PENDING; 1754 return (EIO); 1755 } 1756 if (st->flags & ST_AT_FILEMARK) 1757 st->flags &= ~ST_AT_FILEMARK; 1758 break; 1759 } 1760 if (number == 0) 1761 return (0); 1762 1763 memset(&cmd, 0, sizeof(cmd)); 1764 cmd.opcode = SPACE; 1765 cmd.byte2 = what; 1766 _lto3b(number, cmd.number); 1767 1768 st->flags &= ~ST_POSUPDATED; 1769 st->last_ctl_resid = 0; 1770 error = scsipi_command(st->sc_periph, 1771 (struct scsipi_generic *)&cmd, sizeof(cmd), 1772 0, 0, 0, ST_SPC_TIME, NULL, flags); 1773 1774 if (error == 0 && (st->flags & ST_POSUPDATED) == 0) { 1775 number = number - st->last_ctl_resid; 1776 if (what == SP_BLKS) { 1777 if (st->blkno != -1) { 1778 st->blkno += number; 1779 } 1780 } else if (what == SP_FILEMARKS) { 1781 if (st->fileno != -1) { 1782 st->fileno += number; 1783 if (number > 0) { 1784 st->blkno = 0; 1785 } else if (number < 0) { 1786 st->blkno = -1; 1787 } 1788 } 1789 } else if (what == SP_EOM) { 1790 /* 1791 * This loses us relative position. 1792 */ 1793 st->fileno = st->blkno = -1; 1794 } 1795 } 1796 return (error); 1797 } 1798 1799 /* 1800 * write N filemarks 1801 */ 1802 int 1803 st_write_filemarks(st, number, flags) 1804 struct st_softc *st; 1805 int flags; 1806 int number; 1807 { 1808 int error; 1809 struct scsi_write_filemarks cmd; 1810 1811 /* 1812 * It's hard to write a negative number of file marks. 1813 * Don't try. 1814 */ 1815 if (number < 0) 1816 return (EINVAL); 1817 switch (number) { 1818 case 0: /* really a command to sync the drive's buffers */ 1819 break; 1820 case 1: 1821 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 1822 st->flags &= ~ST_WRITTEN; 1823 else 1824 st->flags |= ST_FM_WRITTEN; 1825 st->flags &= ~ST_PER_ACTION; 1826 break; 1827 default: 1828 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 1829 } 1830 1831 memset(&cmd, 0, sizeof(cmd)); 1832 cmd.opcode = WRITE_FILEMARKS; 1833 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1834 cmd.byte2 = SR_IMMED; 1835 /* 1836 * The ATAPI Onstream DI-30 doesn't support writing filemarks, but 1837 * WRITE_FILEMARKS is still used to flush the buffer 1838 */ 1839 if ((st->quirks & ST_Q_NOFILEMARKS) == 0) 1840 _lto3b(number, cmd.number); 1841 1842 /* XXX WE NEED TO BE ABLE TO GET A RESIDIUAL XXX */ 1843 error = scsipi_command(st->sc_periph, 1844 (struct scsipi_generic *)&cmd, sizeof(cmd), 1845 0, 0, 0, ST_IO_TIME * 4, NULL, flags); 1846 if (error == 0 && st->fileno != -1) { 1847 st->fileno += number; 1848 } 1849 return (error); 1850 } 1851 1852 /* 1853 * Make sure the right number of file marks is on tape if the 1854 * tape has been written. If the position argument is true, 1855 * leave the tape positioned where it was originally. 1856 * 1857 * nmarks returns the number of marks to skip (or, if position 1858 * true, which were skipped) to get back original position. 1859 */ 1860 int 1861 st_check_eod(st, position, nmarks, flags) 1862 struct st_softc *st; 1863 boolean position; 1864 int *nmarks; 1865 int flags; 1866 { 1867 int error; 1868 1869 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 1870 default: 1871 *nmarks = 0; 1872 return (0); 1873 case ST_WRITTEN: 1874 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 1875 *nmarks = 1; 1876 break; 1877 case ST_WRITTEN | ST_2FM_AT_EOD: 1878 *nmarks = 2; 1879 } 1880 error = st_write_filemarks(st, *nmarks, flags); 1881 if (position && !error) 1882 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 1883 return (error); 1884 } 1885 1886 /* 1887 * load/unload/retension 1888 */ 1889 int 1890 st_load(st, type, flags) 1891 struct st_softc *st; 1892 u_int type; 1893 int flags; 1894 { 1895 int error; 1896 struct scsi_load cmd; 1897 1898 if (type != LD_LOAD) { 1899 int nmarks; 1900 1901 error = st_check_eod(st, FALSE, &nmarks, flags); 1902 if (error) { 1903 printf("%s: failed to write closing filemarks at " 1904 "unload, errno=%d\n", st->sc_dev.dv_xname, error); 1905 return (error); 1906 } 1907 } 1908 if (st->quirks & ST_Q_IGNORE_LOADS) { 1909 if (type == LD_LOAD) { 1910 /* 1911 * If we ignore loads, at least we should try a rewind. 1912 */ 1913 return st_rewind(st, 0, flags); 1914 } 1915 /* otherwise, we should do what's asked of us */ 1916 } 1917 1918 memset(&cmd, 0, sizeof(cmd)); 1919 cmd.opcode = LOAD; 1920 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1921 cmd.byte2 = SR_IMMED; 1922 cmd.how = type; 1923 1924 error = scsipi_command(st->sc_periph, 1925 (struct scsipi_generic *)&cmd, sizeof(cmd), 1926 0, 0, ST_RETRIES, ST_SPC_TIME, NULL, flags); 1927 if (error) { 1928 printf("%s: error %d in st_load (op %d)\n", 1929 st->sc_dev.dv_xname, error, type); 1930 } 1931 return (error); 1932 } 1933 1934 /* 1935 * Rewind the device 1936 */ 1937 int 1938 st_rewind(st, immediate, flags) 1939 struct st_softc *st; 1940 u_int immediate; 1941 int flags; 1942 { 1943 struct scsi_rewind cmd; 1944 int error; 1945 int nmarks; 1946 1947 error = st_check_eod(st, FALSE, &nmarks, flags); 1948 if (error) { 1949 printf("%s: failed to write closing filemarks at " 1950 "rewind, errno=%d\n", st->sc_dev.dv_xname, error); 1951 return (error); 1952 } 1953 st->flags &= ~ST_PER_ACTION; 1954 1955 /* 1956 * ATAPI tapes always need immediate to be set 1957 */ 1958 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1959 immediate = SR_IMMED; 1960 1961 memset(&cmd, 0, sizeof(cmd)); 1962 cmd.opcode = REWIND; 1963 cmd.byte2 = immediate; 1964 1965 error = scsipi_command(st->sc_periph, 1966 (struct scsipi_generic *)&cmd, sizeof(cmd), 0, 0, ST_RETRIES, 1967 immediate ? ST_CTL_TIME: ST_SPC_TIME, NULL, flags); 1968 if (error) { 1969 printf("%s: error %d trying to rewind\n", 1970 st->sc_dev.dv_xname, error); 1971 /* lost position */ 1972 st->fileno = st->blkno = -1; 1973 } else { 1974 st->fileno = st->blkno = 0; 1975 } 1976 return (error); 1977 } 1978 1979 int 1980 st_rdpos(st, hard, blkptr) 1981 struct st_softc *st; 1982 int hard; 1983 u_int32_t *blkptr; 1984 { 1985 int error; 1986 u_int8_t posdata[20]; 1987 struct scsi_tape_read_position cmd; 1988 1989 /* 1990 * We try and flush any buffered writes here if we were writing 1991 * and we're trying to get hardware block position. It eats 1992 * up performance substantially, but I'm wary of drive firmware. 1993 * 1994 * I think that *logical* block position is probably okay- 1995 * but hardware block position might have to wait for data 1996 * to hit media to be valid. Caveat Emptor. 1997 */ 1998 1999 if (hard && (st->flags & ST_WRITTEN)) { 2000 /* 2001 * First flush any pending writes... 2002 */ 2003 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 2004 /* 2005 * The latter case is for 'write protected' tapes 2006 * which are too stupid to recognize a zero count 2007 * for writing filemarks as a no-op. 2008 */ 2009 if (error != 0 && error != EACCES && error != EROFS) 2010 return (error); 2011 } 2012 2013 memset(&cmd, 0, sizeof(cmd)); 2014 memset(&posdata, 0, sizeof(posdata)); 2015 cmd.opcode = READ_POSITION; 2016 if (hard) 2017 cmd.byte1 = 1; 2018 2019 error = scsipi_command(st->sc_periph, 2020 (struct scsipi_generic *)&cmd, sizeof(cmd), (u_char *)&posdata, 2021 sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, 2022 XS_CTL_SILENT | XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); 2023 2024 if (error == 0) { 2025 #if 0 2026 printf("posdata:"); 2027 for (hard = 0; hard < sizeof(posdata); hard++) 2028 printf("%02x ", posdata[hard] & 0xff); 2029 printf("\n"); 2030 #endif 2031 if (posdata[0] & 0x4) /* Block Position Unknown */ 2032 error = EINVAL; 2033 else 2034 *blkptr = _4btol(&posdata[4]); 2035 } 2036 return (error); 2037 } 2038 2039 int 2040 st_setpos(st, hard, blkptr) 2041 struct st_softc *st; 2042 int hard; 2043 u_int32_t *blkptr; 2044 { 2045 int error; 2046 struct scsi_tape_locate cmd; 2047 2048 /* 2049 * We used to try and flush any buffered writes here. 2050 * Now we push this onto user applications to either 2051 * flush the pending writes themselves (via a zero count 2052 * WRITE FILEMARKS command) or they can trust their tape 2053 * drive to do this correctly for them. 2054 * 2055 * There are very ugly performance limitations otherwise. 2056 */ 2057 2058 memset(&cmd, 0, sizeof(cmd)); 2059 cmd.opcode = LOCATE; 2060 if (hard) 2061 cmd.byte2 = 1 << 2; 2062 _lto4b(*blkptr, cmd.blkaddr); 2063 error = scsipi_command(st->sc_periph, 2064 (struct scsipi_generic *)&cmd, sizeof(cmd), 2065 NULL, 0, ST_RETRIES, ST_SPC_TIME, NULL, 0); 2066 /* 2067 * Note file && block number position now unknown (if 2068 * these things ever start being maintained in this driver) 2069 */ 2070 st->fileno = st->blkno = -1; 2071 return (error); 2072 } 2073 2074 2075 /* 2076 * Look at the returned sense and act on the error and determine 2077 * the unix error number to pass back..., 0 (== report no error), 2078 * -1 = retry the operation, -2 continue error processing. 2079 */ 2080 int 2081 st_interpret_sense(xs) 2082 struct scsipi_xfer *xs; 2083 { 2084 struct scsipi_periph *periph = xs->xs_periph; 2085 struct scsipi_sense_data *sense = &xs->sense.scsi_sense; 2086 struct buf *bp = xs->bp; 2087 struct st_softc *st = (void *)periph->periph_dev; 2088 int retval = EJUSTRETURN; 2089 int doprint = ((xs->xs_control & XS_CTL_SILENT) == 0); 2090 u_int8_t key; 2091 int32_t info; 2092 2093 /* 2094 * If it isn't a extended or extended/deferred error, let 2095 * the generic code handle it. 2096 */ 2097 if ((sense->error_code & SSD_ERRCODE) != 0x70 && 2098 (sense->error_code & SSD_ERRCODE) != 0x71) { /* DEFFERRED */ 2099 return (retval); 2100 } 2101 2102 if (sense->error_code & SSD_ERRCODE_VALID) 2103 info = _4btol(sense->info); 2104 else 2105 info = (st->flags & ST_FIXEDBLOCKS) ? 2106 xs->datalen / st->blksize : xs->datalen; 2107 key = sense->flags & SSD_KEY; 2108 st->mt_erreg = key; 2109 st->asc = sense->add_sense_code; 2110 st->ascq = sense->add_sense_code_qual; 2111 st->mt_resid = (short) info; 2112 2113 if (key == SKEY_NOT_READY && st->asc == 0x4 && st->ascq == 0x1) { 2114 /* Not Ready, Logical Unit Is in Process Of Becoming Ready */ 2115 if (!callout_pending(&periph->periph_callout)) 2116 scsipi_periph_freeze(periph, 1); 2117 callout_reset(&periph->periph_callout, 2118 hz, scsipi_periph_timed_thaw, periph); 2119 return (ERESTART); 2120 } 2121 2122 /* 2123 * If the device is not open yet, let generic handle 2124 */ 2125 if ((periph->periph_flags & PERIPH_OPEN) == 0) { 2126 return (retval); 2127 } 2128 2129 xs->resid = info; 2130 if (st->flags & ST_FIXEDBLOCKS) { 2131 if (bp) { 2132 xs->resid *= st->blksize; 2133 st->last_io_resid = xs->resid; 2134 } else { 2135 st->last_ctl_resid = xs->resid; 2136 } 2137 if (key == SKEY_VOLUME_OVERFLOW) { 2138 st->flags |= ST_EIO_PENDING; 2139 if (bp) 2140 bp->b_resid = xs->resid; 2141 } else if (sense->flags & SSD_EOM) { 2142 if ((st->flags & ST_EARLYWARN) == 0) 2143 st->flags |= ST_EIO_PENDING; 2144 st->flags |= ST_EOM_PENDING; 2145 if (bp) { 2146 #if 0 2147 bp->b_resid = xs->resid; 2148 #else 2149 /* 2150 * Grotesque as it seems, the few times 2151 * I've actually seen a non-zero resid, 2152 * the tape drive actually lied and had 2153 * written all the data! 2154 */ 2155 bp->b_resid = 0; 2156 #endif 2157 } 2158 } 2159 if (sense->flags & SSD_FILEMARK) { 2160 st->flags |= ST_AT_FILEMARK; 2161 if (bp) 2162 bp->b_resid = xs->resid; 2163 if (st->fileno != (daddr_t) -1) { 2164 st->fileno++; 2165 st->blkno = 0; 2166 st->flags |= ST_POSUPDATED; 2167 } 2168 } 2169 if (sense->flags & SSD_ILI) { 2170 st->flags |= ST_EIO_PENDING; 2171 if (bp) 2172 bp->b_resid = xs->resid; 2173 if (sense->error_code & SSD_ERRCODE_VALID && 2174 (xs->xs_control & XS_CTL_SILENT) == 0) 2175 printf("%s: block wrong size, %d blocks " 2176 "residual\n", st->sc_dev.dv_xname, info); 2177 2178 /* 2179 * This quirk code helps the drive read 2180 * the first tape block, regardless of 2181 * format. That is required for these 2182 * drives to return proper MODE SENSE 2183 * information. 2184 */ 2185 if ((st->quirks & ST_Q_SENSE_HELP) && 2186 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 2187 st->blksize -= 512; 2188 else if ((st->flags & ST_POSUPDATED) == 0) { 2189 if (st->blkno != (daddr_t) -1) { 2190 st->blkno += 2191 (xs->datalen / st->blksize); 2192 st->flags |= ST_POSUPDATED; 2193 } 2194 } 2195 } 2196 /* 2197 * If data wanted and no data was transferred, do it immediately 2198 */ 2199 if (xs->datalen && xs->resid >= xs->datalen) { 2200 if (st->flags & ST_EIO_PENDING) 2201 return (EIO); 2202 if (st->flags & ST_AT_FILEMARK) { 2203 if (bp) 2204 bp->b_resid = xs->resid; 2205 return (0); 2206 } 2207 } 2208 } else { /* must be variable mode */ 2209 if (bp) { 2210 st->last_io_resid = xs->resid; 2211 } else { 2212 st->last_ctl_resid = xs->resid; 2213 } 2214 if (sense->flags & SSD_EOM) { 2215 /* 2216 * The current semantics of this 2217 * driver requires EOM detection 2218 * to return EIO unless early 2219 * warning detection is enabled 2220 * for variable mode (this is always 2221 * on for fixed block mode). 2222 */ 2223 if (st->flags & ST_EARLYWARN) { 2224 st->flags |= ST_EOM_PENDING; 2225 retval = 0; 2226 } else { 2227 retval = EIO; 2228 } 2229 2230 /* 2231 * If it's an unadorned EOM detection, 2232 * suppress printing an error. 2233 */ 2234 if (key == SKEY_NO_SENSE) { 2235 doprint = 0; 2236 } 2237 } else if (sense->flags & SSD_FILEMARK) { 2238 retval = 0; 2239 if (st->fileno != (daddr_t) -1) { 2240 st->fileno++; 2241 st->blkno = 0; 2242 st->flags |= ST_POSUPDATED; 2243 } 2244 } else if (sense->flags & SSD_ILI) { 2245 if (info < 0) { 2246 /* 2247 * The tape record was bigger than the read 2248 * we issued. 2249 */ 2250 if ((xs->xs_control & XS_CTL_SILENT) == 0) { 2251 printf("%s: %d-byte tape record too big" 2252 " for %d-byte user buffer\n", 2253 st->sc_dev.dv_xname, 2254 xs->datalen - info, xs->datalen); 2255 } 2256 retval = EIO; 2257 } else { 2258 retval = 0; 2259 if (st->blkno != (daddr_t) -1) { 2260 st->blkno++; 2261 st->flags |= ST_POSUPDATED; 2262 } 2263 } 2264 } 2265 if (bp) 2266 bp->b_resid = info; 2267 } 2268 2269 #ifndef SCSIPI_DEBUG 2270 if (retval == 0 && key == SKEY_NO_SENSE) 2271 doprint = 0; 2272 #endif 2273 if (key == SKEY_BLANK_CHECK) { 2274 /* 2275 * This quirk code helps the drive read the 2276 * first tape block, regardless of format. That 2277 * is required for these drives to return proper 2278 * MODE SENSE information. 2279 */ 2280 if ((st->quirks & ST_Q_SENSE_HELP) && 2281 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 2282 /* still starting */ 2283 st->blksize -= 512; 2284 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 2285 st->flags |= ST_BLANK_READ; 2286 xs->resid = xs->datalen; 2287 if (bp) { 2288 bp->b_resid = xs->resid; 2289 /* return an EOF */ 2290 } 2291 retval = 0; 2292 /* lost position */ 2293 st->fileno = st->blkno = -1; 2294 } 2295 } 2296 2297 /* 2298 * If generic sense processing will continue, we should not 2299 * print sense info here. 2300 */ 2301 if (retval == EJUSTRETURN) 2302 doprint = 0; 2303 2304 if (doprint) { 2305 #ifdef SCSIVERBOSE 2306 scsipi_print_sense(xs, 0); 2307 #else 2308 scsipi_printaddr(periph); 2309 printf("Sense Key 0x%02x", key); 2310 if ((sense->error_code & SSD_ERRCODE_VALID) != 0) { 2311 switch (key) { 2312 case SKEY_NOT_READY: 2313 case SKEY_ILLEGAL_REQUEST: 2314 case SKEY_UNIT_ATTENTION: 2315 case SKEY_WRITE_PROTECT: 2316 break; 2317 case SKEY_VOLUME_OVERFLOW: 2318 case SKEY_BLANK_CHECK: 2319 printf(", requested size: %d (decimal)", info); 2320 break; 2321 case SKEY_ABORTED_COMMAND: 2322 if (xs->xs_retries) 2323 printf(", retrying"); 2324 printf(", cmd 0x%x, info 0x%x", 2325 xs->cmd->opcode, info); 2326 break; 2327 default: 2328 printf(", info = %d (decimal)", info); 2329 } 2330 } 2331 if (sense->extra_len != 0) { 2332 int n; 2333 printf(", data ="); 2334 for (n = 0; n < sense->extra_len; n++) 2335 printf(" %02x", sense->cmd_spec_info[n]); 2336 } 2337 printf("\n"); 2338 #endif 2339 } 2340 return (retval); 2341 } 2342 2343 /* 2344 * The quirk here is that the drive returns some value to st_mode_sense 2345 * incorrectly until the tape has actually passed by the head. 2346 * 2347 * The method is to set the drive to large fixed-block state (user-specified 2348 * density and 1024-byte blocks), then read and rewind to get it to sense the 2349 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 2350 * work, as a last resort, try variable- length blocks. The result will be 2351 * the ability to do an accurate st_mode_sense. 2352 * 2353 * We know we can do a rewind because we just did a load, which implies rewind. 2354 * Rewind seems preferable to space backward if we have a virgin tape. 2355 * 2356 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 2357 * error processing, both part of st_interpret_sense. 2358 */ 2359 int 2360 st_touch_tape(st) 2361 struct st_softc *st; 2362 { 2363 char *buf; 2364 int readsize; 2365 int error; 2366 2367 buf = malloc(1024, M_TEMP, M_NOWAIT); 2368 if (buf == NULL) 2369 return (ENOMEM); 2370 2371 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 2372 goto bad; 2373 2374 /* 2375 * If the block size is already known from the 2376 * sense data, use it. Else start probing at 1024. 2377 */ 2378 if (st->media_blksize > 0) 2379 st->blksize = st->media_blksize; 2380 else 2381 st->blksize = 1024; 2382 2383 do { 2384 switch (st->blksize) { 2385 case 512: 2386 case 1024: 2387 readsize = st->blksize; 2388 st->flags |= ST_FIXEDBLOCKS; 2389 break; 2390 default: 2391 readsize = 1; 2392 st->flags &= ~ST_FIXEDBLOCKS; 2393 } 2394 if ((error = st->ops(st, ST_OPS_MODESELECT, XS_CTL_SILENT)) 2395 != 0) { 2396 /* 2397 * The device did not agree with the proposed 2398 * block size. If we exhausted our options, 2399 * return failure, else try another. 2400 */ 2401 if (readsize == 1) 2402 goto bad; 2403 st->blksize -= 512; 2404 continue; 2405 } 2406 st_read(st, buf, readsize, XS_CTL_SILENT); /* XXX */ 2407 if ((error = st_rewind(st, 0, 0)) != 0) { 2408 bad: free(buf, M_TEMP); 2409 return (error); 2410 } 2411 } while (readsize != 1 && readsize > st->blksize); 2412 2413 free(buf, M_TEMP); 2414 return (0); 2415 } 2416 2417 int 2418 stdump(dev, blkno, va, size) 2419 dev_t dev; 2420 daddr_t blkno; 2421 caddr_t va; 2422 size_t size; 2423 { 2424 2425 /* Not implemented. */ 2426 return (ENXIO); 2427 } 2428