1 /* $NetBSD: st.c,v 1.173 2004/10/28 07:07:45 yamt Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 2004 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Charles M. Hannum. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Originally written by Julian Elischer (julian@tfs.com) 41 * for TRW Financial Systems for use under the MACH(2.5) operating system. 42 * 43 * TRW Financial Systems, in accordance with their agreement with Carnegie 44 * Mellon University, makes this software available to CMU to distribute 45 * or use in any manner that they see fit as long as this message is kept with 46 * the software. For this reason TFS also grants any other persons or 47 * organisations permission to use or modify this software. 48 * 49 * TFS supplies this software to be publicly redistributed 50 * on the understanding that TFS is not responsible for the correct 51 * functioning of this software in any circumstances. 52 * 53 * Ported to run under 386BSD by Julian Elischer (julian@tfs.com) Sept 1992 54 * major changes by Julian Elischer (julian@jules.dialix.oz.au) May 1993 55 * 56 * A lot of rewhacking done by mjacob (mjacob@nas.nasa.gov). 57 */ 58 59 #include <sys/cdefs.h> 60 __KERNEL_RCSID(0, "$NetBSD: st.c,v 1.173 2004/10/28 07:07:45 yamt Exp $"); 61 62 #include "opt_scsi.h" 63 64 #include <sys/param.h> 65 #include <sys/systm.h> 66 #include <sys/fcntl.h> 67 #include <sys/errno.h> 68 #include <sys/ioctl.h> 69 #include <sys/malloc.h> 70 #include <sys/buf.h> 71 #include <sys/bufq.h> 72 #include <sys/proc.h> 73 #include <sys/user.h> 74 #include <sys/mtio.h> 75 #include <sys/device.h> 76 #include <sys/conf.h> 77 #include <sys/kernel.h> 78 #include <sys/vnode.h> 79 80 #include <dev/scsipi/scsipi_all.h> 81 #include <dev/scsipi/scsi_all.h> 82 #include <dev/scsipi/scsi_tape.h> 83 #include <dev/scsipi/scsipiconf.h> 84 #include <dev/scsipi/scsipi_base.h> 85 #include <dev/scsipi/stvar.h> 86 87 /* Defines for device specific stuff */ 88 #define DEF_FIXED_BSIZE 512 89 90 #define STMODE(z) ( minor(z) & 0x03) 91 #define STDSTY(z) ((minor(z) >> 2) & 0x03) 92 #define STUNIT(z) ((minor(z) >> 4) ) 93 #define STNMINOR 16 94 95 #define NORMAL_MODE 0 96 #define NOREW_MODE 1 97 #define EJECT_MODE 2 98 #define CTRL_MODE 3 99 100 #define FALSE 0 101 #define TRUE 1 102 103 #ifndef ST_MOUNT_DELAY 104 #define ST_MOUNT_DELAY 0 105 #endif 106 107 static dev_type_open(stopen); 108 static dev_type_close(stclose); 109 static dev_type_read(stread); 110 static dev_type_write(stwrite); 111 static dev_type_ioctl(stioctl); 112 static dev_type_strategy(ststrategy); 113 static dev_type_dump(stdump); 114 115 const struct bdevsw st_bdevsw = { 116 stopen, stclose, ststrategy, stioctl, stdump, nosize, D_TAPE 117 }; 118 119 const struct cdevsw st_cdevsw = { 120 stopen, stclose, stread, stwrite, stioctl, 121 nostop, notty, nopoll, nommap, nokqfilter, D_TAPE 122 }; 123 124 /* 125 * Define various devices that we know mis-behave in some way, 126 * and note how they are bad, so we can correct for them 127 */ 128 129 static const struct st_quirk_inquiry_pattern st_quirk_patterns[] = { 130 {{T_SEQUENTIAL, T_REMOV, 131 " ", " ", " "}, {0, 0, { 132 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 133 {ST_Q_FORCE_BLKSIZE, 512, QIC_24}, /* minor 4-7 */ 134 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_1600}, /* minor 8-11 */ 135 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_6250} /* minor 12-15 */ 136 }}}, 137 {{T_SEQUENTIAL, T_REMOV, 138 "TANDBERG", " TDC 3600 ", ""}, {0, 12, { 139 {0, 0, 0}, /* minor 0-3 */ 140 {ST_Q_FORCE_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 141 {0, 0, QIC_150}, /* minor 8-11 */ 142 {0, 0, QIC_120} /* minor 12-15 */ 143 }}}, 144 {{T_SEQUENTIAL, T_REMOV, 145 "TANDBERG", " TDC 3800 ", ""}, {0, 0, { 146 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 147 {0, 0, QIC_525}, /* minor 4-7 */ 148 {0, 0, QIC_150}, /* minor 8-11 */ 149 {0, 0, QIC_120} /* minor 12-15 */ 150 }}}, 151 {{T_SEQUENTIAL, T_REMOV, 152 "TANDBERG", " SLR5 4/8GB ", ""}, {0, 0, { 153 {ST_Q_FORCE_BLKSIZE, 1024, 0}, /* minor 0-3 */ 154 {0, 0, 0}, /* minor 4-7 */ 155 {0, 0, 0}, /* minor 8-11 */ 156 {0, 0, 0} /* minor 12-15 */ 157 }}}, 158 /* 159 * lacking a manual for the 4200, it's not clear what the 160 * specific density codes should be- the device is a 2.5GB 161 * capable QIC drive, those density codes aren't readily 162 * availabel. The 'default' will just have to do. 163 */ 164 {{T_SEQUENTIAL, T_REMOV, 165 "TANDBERG", " TDC 4200 ", ""}, {0, 0, { 166 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 167 {0, 0, QIC_525}, /* minor 4-7 */ 168 {0, 0, QIC_150}, /* minor 8-11 */ 169 {0, 0, QIC_120} /* minor 12-15 */ 170 }}}, 171 /* 172 * At least -005 and -007 need this. I'll assume they all do unless I 173 * hear otherwise. - mycroft, 31MAR1994 174 */ 175 {{T_SEQUENTIAL, T_REMOV, 176 "ARCHIVE ", "VIPER 2525 25462", ""}, {0, 0, { 177 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 178 {ST_Q_SENSE_HELP, 0, QIC_525}, /* minor 4-7 */ 179 {0, 0, QIC_150}, /* minor 8-11 */ 180 {0, 0, QIC_120} /* minor 12-15 */ 181 }}}, 182 /* 183 * One user reports that this works for his tape drive. It probably 184 * needs more work. - mycroft, 09APR1994 185 */ 186 {{T_SEQUENTIAL, T_REMOV, 187 "SANKYO ", "CP525 ", ""}, {0, 0, { 188 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 189 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 190 {0, 0, QIC_150}, /* minor 8-11 */ 191 {0, 0, QIC_120} /* minor 12-15 */ 192 }}}, 193 {{T_SEQUENTIAL, T_REMOV, 194 "ANRITSU ", "DMT780 ", ""}, {0, 0, { 195 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 196 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 197 {0, 0, QIC_150}, /* minor 8-11 */ 198 {0, 0, QIC_120} /* minor 12-15 */ 199 }}}, 200 {{T_SEQUENTIAL, T_REMOV, 201 "ARCHIVE ", "VIPER 150 21247", ""}, {ST_Q_ERASE_NOIMM, 12, { 202 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 203 {0, 0, QIC_150}, /* minor 4-7 */ 204 {0, 0, QIC_120}, /* minor 8-11 */ 205 {0, 0, QIC_24} /* minor 12-15 */ 206 }}}, 207 {{T_SEQUENTIAL, T_REMOV, 208 "ARCHIVE ", "VIPER 150 21531", ""}, {ST_Q_ERASE_NOIMM, 12, { 209 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 210 {0, 0, QIC_150}, /* minor 4-7 */ 211 {0, 0, QIC_120}, /* minor 8-11 */ 212 {0, 0, QIC_24} /* minor 12-15 */ 213 }}}, 214 {{T_SEQUENTIAL, T_REMOV, 215 "WANGTEK ", "5099ES SCSI", ""}, {0, 0, { 216 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 217 {0, 0, QIC_11}, /* minor 4-7 */ 218 {0, 0, QIC_24}, /* minor 8-11 */ 219 {0, 0, QIC_24} /* minor 12-15 */ 220 }}}, 221 {{T_SEQUENTIAL, T_REMOV, 222 "WANGTEK ", "5150ES SCSI", ""}, {0, 0, { 223 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 224 {0, 0, QIC_24}, /* minor 4-7 */ 225 {0, 0, QIC_120}, /* minor 8-11 */ 226 {0, 0, QIC_150} /* minor 12-15 */ 227 }}}, 228 {{T_SEQUENTIAL, T_REMOV, 229 "WANGTEK ", "5525ES SCSI REV7", ""}, {0, 0, { 230 {0, 0, 0}, /* minor 0-3 */ 231 {ST_Q_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 232 {0, 0, QIC_150}, /* minor 8-11 */ 233 {0, 0, QIC_120} /* minor 12-15 */ 234 }}}, 235 {{T_SEQUENTIAL, T_REMOV, 236 "WangDAT ", "Model 1300 ", ""}, {0, 0, { 237 {0, 0, 0}, /* minor 0-3 */ 238 {ST_Q_FORCE_BLKSIZE, 512, DDS}, /* minor 4-7 */ 239 {ST_Q_FORCE_BLKSIZE, 1024, DDS}, /* minor 8-11 */ 240 {ST_Q_FORCE_BLKSIZE, 0, DDS} /* minor 12-15 */ 241 }}}, 242 {{T_SEQUENTIAL, T_REMOV, 243 "EXABYTE ", "EXB-8200 ", "263H"}, {0, 5, { 244 {0, 0, 0}, /* minor 0-3 */ 245 {0, 0, 0}, /* minor 4-7 */ 246 {0, 0, 0}, /* minor 8-11 */ 247 {0, 0, 0} /* minor 12-15 */ 248 }}}, 249 {{T_SEQUENTIAL, T_REMOV, 250 "STK", "9490", ""}, 251 {ST_Q_FORCE_BLKSIZE, 0, { 252 {0, 0, 0}, /* minor 0-3 */ 253 {0, 0, 0}, /* minor 4-7 */ 254 {0, 0, 0}, /* minor 8-11 */ 255 {0, 0, 0} /* minor 12-15 */ 256 }}}, 257 {{T_SEQUENTIAL, T_REMOV, 258 "STK", "SD-3", ""}, 259 {ST_Q_FORCE_BLKSIZE, 0, { 260 {0, 0, 0}, /* minor 0-3 */ 261 {0, 0, 0}, /* minor 4-7 */ 262 {0, 0, 0}, /* minor 8-11 */ 263 {0, 0, 0} /* minor 12-15 */ 264 }}}, 265 {{T_SEQUENTIAL, T_REMOV, 266 "IBM", "03590", ""}, {ST_Q_IGNORE_LOADS, 0, { 267 {0, 0, 0}, /* minor 0-3 */ 268 {0, 0, 0}, /* minor 4-7 */ 269 {0, 0, 0}, /* minor 8-11 */ 270 {0, 0, 0} /* minor 12-15 */ 271 }}}, 272 {{T_SEQUENTIAL, T_REMOV, 273 "HP ", "T4000s ", ""}, {ST_Q_UNIMODAL, 0, { 274 {0, 0, QIC_3095}, /* minor 0-3 */ 275 {0, 0, QIC_3095}, /* minor 4-7 */ 276 {0, 0, QIC_3095}, /* minor 8-11 */ 277 {0, 0, QIC_3095}, /* minor 12-15 */ 278 }}}, 279 #if 0 280 {{T_SEQUENTIAL, T_REMOV, 281 "EXABYTE ", "EXB-8200 ", ""}, {0, 12, { 282 {0, 0, 0}, /* minor 0-3 */ 283 {0, 0, 0}, /* minor 4-7 */ 284 {0, 0, 0}, /* minor 8-11 */ 285 {0, 0, 0} /* minor 12-15 */ 286 }}}, 287 #endif 288 {{T_SEQUENTIAL, T_REMOV, 289 "TEAC ", "MT-2ST/N50 ", ""}, {ST_Q_IGNORE_LOADS, 0, { 290 {0, 0, 0}, /* minor 0-3 */ 291 {0, 0, 0}, /* minor 4-7 */ 292 {0, 0, 0}, /* minor 8-11 */ 293 {0, 0, 0} /* minor 12-15 */ 294 }}}, 295 {{T_SEQUENTIAL, T_REMOV, 296 "OnStream", "ADR50 Drive", ""}, {ST_Q_UNIMODAL, 0, { 297 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 298 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 4-7 */ 299 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 8-11 */ 300 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 12-15 */ 301 }}}, 302 {{T_SEQUENTIAL, T_REMOV, 303 "OnStream DI-30", "", "1.0"}, {ST_Q_NOFILEMARKS, 0, { 304 {0, 0, 0}, /* minor 0-3 */ 305 {0, 0, 0}, /* minor 4-7 */ 306 {0, 0, 0}, /* minor 8-11 */ 307 {0, 0, 0} /* minor 12-15 */ 308 }}}, 309 {{T_SEQUENTIAL, T_REMOV, 310 "NCR H621", "0-STD-03-46F880 ", ""}, {ST_Q_NOPREVENT, 0, { 311 {0, 0, 0}, /* minor 0-3 */ 312 {0, 0, 0}, /* minor 4-7 */ 313 {0, 0, 0}, /* minor 8-11 */ 314 {0, 0, 0} /* minor 12-15 */ 315 }}}, 316 }; 317 318 #define NOEJECT 0 319 #define EJECT 1 320 321 static void st_identify_drive(struct st_softc *, 322 struct scsipi_inquiry_pattern *); 323 static void st_loadquirks(struct st_softc *); 324 static int st_mount_tape(dev_t, int); 325 static void st_unmount(struct st_softc *, boolean); 326 static int st_decide_mode(struct st_softc *, boolean); 327 static void ststart(struct scsipi_periph *); 328 static void strestart(void *); 329 static void stdone(struct scsipi_xfer *, int); 330 static int st_read(struct st_softc *, char *, int, int); 331 static int st_space(struct st_softc *, int, u_int, int); 332 static int st_write_filemarks(struct st_softc *, int, int); 333 static int st_check_eod(struct st_softc *, boolean, int *, int); 334 static int st_load(struct st_softc *, u_int, int); 335 static int st_rewind(struct st_softc *, u_int, int); 336 static int st_interpret_sense(struct scsipi_xfer *); 337 static int st_touch_tape(struct st_softc *); 338 static int st_erase(struct st_softc *, int full, int flags); 339 static int st_rdpos(struct st_softc *, int, u_int32_t *); 340 static int st_setpos(struct st_softc *, int, u_int32_t *); 341 342 static const struct scsipi_periphsw st_switch = { 343 st_interpret_sense, 344 ststart, 345 NULL, 346 stdone 347 }; 348 349 #if defined(ST_ENABLE_EARLYWARN) 350 #define ST_INIT_FLAGS ST_EARLYWARN 351 #else 352 #define ST_INIT_FLAGS 0 353 #endif 354 355 /* 356 * The routine called by the low level scsi routine when it discovers 357 * A device suitable for this driver 358 */ 359 void 360 stattach(struct device *parent, struct st_softc *st, void *aux) 361 { 362 struct scsipibus_attach_args *sa = aux; 363 struct scsipi_periph *periph = sa->sa_periph; 364 365 SC_DEBUG(periph, SCSIPI_DB2, ("stattach: ")); 366 367 /* 368 * Store information needed to contact our base driver 369 */ 370 st->sc_periph = periph; 371 periph->periph_dev = &st->sc_dev; 372 periph->periph_switch = &st_switch; 373 374 /* 375 * Set initial flags 376 */ 377 378 st->flags = ST_INIT_FLAGS; 379 380 /* 381 * Set up the buf queue for this device 382 */ 383 bufq_alloc(&st->buf_queue, BUFQ_FCFS); 384 385 callout_init(&st->sc_callout); 386 387 /* 388 * Check if the drive is a known criminal and take 389 * Any steps needed to bring it into line 390 */ 391 st_identify_drive(st, &sa->sa_inqbuf); 392 /* 393 * Use the subdriver to request information regarding the drive. 394 */ 395 printf("\n"); 396 printf("%s: %s", st->sc_dev.dv_xname, st->quirkdata ? "rogue, " : ""); 397 if (scsipi_test_unit_ready(periph, 398 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE) || 399 st->ops(st, ST_OPS_MODESENSE, 400 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE)) 401 printf("drive empty\n"); 402 else { 403 printf("density code %d, ", st->media_density); 404 if (st->media_blksize > 0) 405 printf("%d-byte", st->media_blksize); 406 else 407 printf("variable"); 408 printf(" blocks, write-%s\n", 409 (st->flags & ST_READONLY) ? "protected" : "enabled"); 410 } 411 412 #if NRND > 0 413 rnd_attach_source(&st->rnd_source, st->sc_dev.dv_xname, 414 RND_TYPE_TAPE, 0); 415 #endif 416 } 417 418 int 419 stactivate(struct device *self, enum devact act) 420 { 421 int rv = 0; 422 423 switch (act) { 424 case DVACT_ACTIVATE: 425 rv = EOPNOTSUPP; 426 break; 427 428 case DVACT_DEACTIVATE: 429 /* 430 * Nothing to do; we key off the device's DVF_ACTIVE. 431 */ 432 break; 433 } 434 return (rv); 435 } 436 437 int 438 stdetach(struct device *self, int flags) 439 { 440 struct st_softc *st = (struct st_softc *)self; 441 struct buf *bp; 442 int s, bmaj, cmaj, mn; 443 444 /* locate the major number */ 445 bmaj = bdevsw_lookup_major(&st_bdevsw); 446 cmaj = cdevsw_lookup_major(&st_cdevsw); 447 448 /* kill any pending restart */ 449 callout_stop(&st->sc_callout); 450 451 s = splbio(); 452 453 /* Kill off any queued buffers. */ 454 while ((bp = BUFQ_GET(&st->buf_queue)) != NULL) { 455 bp->b_error = EIO; 456 bp->b_flags |= B_ERROR; 457 bp->b_resid = bp->b_bcount; 458 biodone(bp); 459 } 460 461 bufq_free(&st->buf_queue); 462 463 /* Kill off any pending commands. */ 464 scsipi_kill_pending(st->sc_periph); 465 466 splx(s); 467 468 /* Nuke the vnodes for any open instances */ 469 mn = STUNIT(self->dv_unit); 470 vdevgone(bmaj, mn, mn+STNMINOR-1, VBLK); 471 vdevgone(cmaj, mn, mn+STNMINOR-1, VCHR); 472 473 474 #if NRND > 0 475 /* Unhook the entropy source. */ 476 rnd_detach_source(&st->rnd_source); 477 #endif 478 479 return (0); 480 } 481 482 /* 483 * Use the inquiry routine in 'scsi_base' to get drive info so we can 484 * Further tailor our behaviour. 485 */ 486 static void 487 st_identify_drive(struct st_softc *st, struct scsipi_inquiry_pattern *inqbuf) 488 { 489 struct st_quirk_inquiry_pattern *finger; 490 int priority; 491 492 finger = (struct st_quirk_inquiry_pattern *)scsipi_inqmatch(inqbuf, 493 (caddr_t)st_quirk_patterns, 494 sizeof(st_quirk_patterns) / sizeof(st_quirk_patterns[0]), 495 sizeof(st_quirk_patterns[0]), &priority); 496 if (priority != 0) { 497 st->quirkdata = &finger->quirkdata; 498 st->drive_quirks = finger->quirkdata.quirks; 499 st->quirks = finger->quirkdata.quirks; /* start value */ 500 st->page_0_size = finger->quirkdata.page_0_size; 501 st_loadquirks(st); 502 } 503 } 504 505 /* 506 * initialise the subdevices to the default (QUIRK) state. 507 * this will remove any setting made by the system operator or previous 508 * operations. 509 */ 510 static void 511 st_loadquirks(struct st_softc *st) 512 { 513 int i; 514 struct modes *mode; 515 struct modes *mode2; 516 517 mode = st->quirkdata->modes; 518 mode2 = st->modes; 519 for (i = 0; i < 4; i++) { 520 memset(mode2, 0, sizeof(struct modes)); 521 st->modeflags[i] &= ~(BLKSIZE_SET_BY_QUIRK | 522 DENSITY_SET_BY_QUIRK | BLKSIZE_SET_BY_USER | 523 DENSITY_SET_BY_USER); 524 if ((mode->quirks | st->drive_quirks) & ST_Q_FORCE_BLKSIZE) { 525 mode2->blksize = mode->blksize; 526 st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; 527 } 528 if (mode->density) { 529 mode2->density = mode->density; 530 st->modeflags[i] |= DENSITY_SET_BY_QUIRK; 531 } 532 mode2->quirks |= mode->quirks; 533 mode++; 534 mode2++; 535 } 536 } 537 538 /* 539 * open the device. 540 */ 541 static int 542 stopen(dev_t dev, int flags, int mode, struct proc *p) 543 { 544 u_int stmode, dsty; 545 int error, sflags, unit, tries, ntries; 546 struct st_softc *st; 547 struct scsipi_periph *periph; 548 struct scsipi_adapter *adapt; 549 550 unit = STUNIT(dev); 551 if (unit >= st_cd.cd_ndevs) 552 return (ENXIO); 553 st = st_cd.cd_devs[unit]; 554 if (st == NULL) 555 return (ENXIO); 556 557 stmode = STMODE(dev); 558 dsty = STDSTY(dev); 559 560 periph = st->sc_periph; 561 adapt = periph->periph_channel->chan_adapter; 562 563 SC_DEBUG(periph, SCSIPI_DB1, ("open: dev=0x%x (unit %d (of %d))\n", dev, 564 unit, st_cd.cd_ndevs)); 565 566 567 /* 568 * Only allow one at a time 569 */ 570 if (periph->periph_flags & PERIPH_OPEN) { 571 printf("%s: already open\n", st->sc_dev.dv_xname); 572 return (EBUSY); 573 } 574 575 if ((error = scsipi_adapter_addref(adapt)) != 0) 576 return (error); 577 578 /* 579 * clear any latched errors. 580 */ 581 st->mt_resid = 0; 582 st->mt_erreg = 0; 583 st->asc = 0; 584 st->ascq = 0; 585 586 /* 587 * Catch any unit attention errors. Be silent about this 588 * unless we're already mounted. We ignore media change 589 * if we're in control mode or not mounted yet. 590 */ 591 if ((st->flags & ST_MOUNTED) == 0 || stmode == CTRL_MODE) { 592 #ifdef SCSIDEBUG 593 sflags = XS_CTL_IGNORE_MEDIA_CHANGE; 594 #else 595 sflags = XS_CTL_SILENT|XS_CTL_IGNORE_MEDIA_CHANGE; 596 #endif 597 } else 598 sflags = 0; 599 600 /* 601 * If we're already mounted or we aren't configured for 602 * a mount delay, only try a test unit ready once. Otherwise, 603 * try up to ST_MOUNT_DELAY times with a rest interval of 604 * one second between each try. 605 */ 606 607 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0) { 608 ntries = 1; 609 } else { 610 ntries = ST_MOUNT_DELAY; 611 } 612 613 for (error = tries = 0; tries < ntries; tries++) { 614 int slpintr, oflags; 615 616 /* 617 * If we had no error, or we're opening the control mode 618 * device, we jump out right away. 619 */ 620 621 error = scsipi_test_unit_ready(periph, sflags); 622 if (error == 0 || stmode == CTRL_MODE) { 623 break; 624 } 625 626 /* 627 * We had an error. 628 * 629 * If we're already mounted or we aren't configured for 630 * a mount delay, or the error isn't a NOT READY error, 631 * skip to the error exit now. 632 */ 633 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0 || 634 (st->mt_key != SKEY_NOT_READY)) { 635 goto bad; 636 } 637 638 /* 639 * clear any latched errors. 640 */ 641 st->mt_resid = 0; 642 st->mt_erreg = 0; 643 st->asc = 0; 644 st->ascq = 0; 645 646 /* 647 * Fake that we have the device open so 648 * we block other apps from getting in. 649 */ 650 651 oflags = periph->periph_flags; 652 periph->periph_flags |= PERIPH_OPEN; 653 654 slpintr = tsleep(&lbolt, PUSER|PCATCH, "stload", 0); 655 656 periph->periph_flags = oflags; /* restore flags */ 657 if (slpintr) { 658 goto bad; 659 } 660 } 661 662 663 /* 664 * If the mode is 3 (e.g. minor = 3,7,11,15) then the device has 665 * been opened to set defaults and perform other, usually non-I/O 666 * related, operations. In this case, do a quick check to see 667 * whether the unit actually had a tape loaded (this will be known 668 * as to whether or not we got a NOT READY for the above 669 * unit attention). If a tape is there, go do a mount sequence. 670 */ 671 if (stmode == CTRL_MODE && st->mt_key == SKEY_NOT_READY) { 672 periph->periph_flags |= PERIPH_OPEN; 673 return (0); 674 } 675 676 /* 677 * If we get this far and had an error set, that means we failed 678 * to pass the 'test unit ready' test for the non-controlmode device, 679 * so we bounce the open. 680 */ 681 682 if (error) 683 return (error); 684 685 /* 686 * Else, we're now committed to saying we're open. 687 */ 688 689 periph->periph_flags |= PERIPH_OPEN; /* unit attn are now errors */ 690 691 /* 692 * If it's a different mode, or if the media has been 693 * invalidated, unmount the tape from the previous 694 * session but continue with open processing 695 */ 696 if (st->last_dsty != dsty || 697 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 698 st_unmount(st, NOEJECT); 699 700 /* 701 * If we are not mounted, then we should start a new 702 * mount session. 703 */ 704 if (!(st->flags & ST_MOUNTED)) { 705 if ((error = st_mount_tape(dev, flags)) != 0) 706 goto bad; 707 st->last_dsty = dsty; 708 } 709 if (!(st->quirks & ST_Q_NOPREVENT)) { 710 scsipi_prevent(periph, PR_PREVENT, 711 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 712 } 713 714 SC_DEBUG(periph, SCSIPI_DB2, ("open complete\n")); 715 return (0); 716 717 bad: 718 st_unmount(st, NOEJECT); 719 scsipi_adapter_delref(adapt); 720 periph->periph_flags &= ~PERIPH_OPEN; 721 return (error); 722 } 723 724 /* 725 * close the device.. only called if we are the LAST 726 * occurence of an open device 727 */ 728 static int 729 stclose(dev_t dev, int flags, int mode, 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 static int 824 st_mount_tape(dev_t dev, int flags) 825 { 826 int unit; 827 u_int dsty; 828 struct st_softc *st; 829 struct scsipi_periph *periph; 830 int error = 0; 831 832 unit = STUNIT(dev); 833 dsty = STDSTY(dev); 834 st = st_cd.cd_devs[unit]; 835 periph = st->sc_periph; 836 837 if (st->flags & ST_MOUNTED) 838 return (0); 839 840 SC_DEBUG(periph, SCSIPI_DB1, ("mounting\n ")); 841 st->flags |= ST_NEW_MOUNT; 842 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 843 /* 844 * If the media is new, then make sure we give it a chance to 845 * to do a 'load' instruction. (We assume it is new.) 846 */ 847 if ((error = st_load(st, LD_LOAD, XS_CTL_SILENT)) != 0) 848 return (error); 849 /* 850 * Throw another dummy instruction to catch 851 * 'Unit attention' errors. Many drives give 852 * these after doing a Load instruction (with 853 * the MEDIUM MAY HAVE CHANGED asc/ascq). 854 */ 855 scsipi_test_unit_ready(periph, XS_CTL_SILENT); /* XXX */ 856 857 /* 858 * Some devices can't tell you much until they have been 859 * asked to look at the media. This quirk does this. 860 */ 861 if (st->quirks & ST_Q_SENSE_HELP) 862 if ((error = st_touch_tape(st)) != 0) 863 return (error); 864 /* 865 * Load the physical device parameters 866 * loads: blkmin, blkmax 867 */ 868 if ((error = st->ops(st, ST_OPS_RBL, 0)) != 0) 869 return (error); 870 /* 871 * Load the media dependent parameters 872 * includes: media_blksize,media_density,numblks 873 * As we have a tape in, it should be reflected here. 874 * If not you may need the "quirk" above. 875 */ 876 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 877 return (error); 878 /* 879 * If we have gained a permanent density from somewhere, 880 * then use it in preference to the one supplied by 881 * default by the driver. 882 */ 883 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 884 st->density = st->modes[dsty].density; 885 else 886 st->density = st->media_density; 887 /* 888 * If we have gained a permanent blocksize 889 * then use it in preference to the one supplied by 890 * default by the driver. 891 */ 892 st->flags &= ~ST_FIXEDBLOCKS; 893 if (st->modeflags[dsty] & 894 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 895 st->blksize = st->modes[dsty].blksize; 896 if (st->blksize) 897 st->flags |= ST_FIXEDBLOCKS; 898 } else { 899 if ((error = st_decide_mode(st, FALSE)) != 0) 900 return (error); 901 } 902 if ((error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 903 /* ATAPI will return ENODEV for this, and this may be OK */ 904 if (error != ENODEV) { 905 printf("%s: cannot set selected mode\n", 906 st->sc_dev.dv_xname); 907 return (error); 908 } 909 } 910 st->flags &= ~ST_NEW_MOUNT; 911 st->flags |= ST_MOUNTED; 912 periph->periph_flags |= PERIPH_MEDIA_LOADED; /* move earlier? */ 913 st->blkno = st->fileno = (daddr_t) 0; 914 return (0); 915 } 916 917 /* 918 * End the present mount session. 919 * Rewind, and optionally eject the tape. 920 * Reset various flags to indicate that all new 921 * operations require another mount operation 922 */ 923 static void 924 st_unmount(struct st_softc *st, boolean eject) 925 { 926 struct scsipi_periph *periph = st->sc_periph; 927 int nmarks; 928 929 if ((st->flags & ST_MOUNTED) == 0) 930 return; 931 SC_DEBUG(periph, SCSIPI_DB1, ("unmounting\n")); 932 st_check_eod(st, FALSE, &nmarks, XS_CTL_IGNORE_NOT_READY); 933 st_rewind(st, 0, XS_CTL_IGNORE_NOT_READY); 934 935 /* 936 * Section 9.3.3 of the SCSI specs states that a device shall return 937 * the density value specified in the last succesfull MODE SELECT 938 * after an unload operation, in case it is not able to 939 * automatically determine the density of the new medium. 940 * 941 * So we instruct the device to use the default density, which will 942 * prevent the use of stale density values (in particular, 943 * in st_touch_tape(). 944 */ 945 st->density = 0; 946 if (st->ops(st, ST_OPS_MODESELECT, 0) != 0) { 947 printf("%s: WARNING: cannot revert to default density\n", 948 st->sc_dev.dv_xname); 949 } 950 951 if (eject) { 952 if (!(st->quirks & ST_Q_NOPREVENT)) { 953 scsipi_prevent(periph, PR_ALLOW, 954 XS_CTL_IGNORE_ILLEGAL_REQUEST | 955 XS_CTL_IGNORE_NOT_READY); 956 } 957 st_load(st, LD_UNLOAD, XS_CTL_IGNORE_NOT_READY); 958 st->blkno = st->fileno = (daddr_t) -1; 959 } else { 960 st->blkno = st->fileno = (daddr_t) 0; 961 } 962 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 963 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 964 } 965 966 /* 967 * Given all we know about the device, media, mode, 'quirks' and 968 * initial operation, make a decision as to how we should be set 969 * to run (regarding blocking and EOD marks) 970 */ 971 int 972 st_decide_mode(struct st_softc *st, boolean first_read) 973 { 974 975 SC_DEBUG(st->sc_periph, SCSIPI_DB2, ("starting block mode decision\n")); 976 977 /* 978 * If the drive can only handle fixed-length blocks and only at 979 * one size, perhaps we should just do that. 980 */ 981 if (st->blkmin && (st->blkmin == st->blkmax)) { 982 st->flags |= ST_FIXEDBLOCKS; 983 st->blksize = st->blkmin; 984 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 985 ("blkmin == blkmax of %d\n", st->blkmin)); 986 goto done; 987 } 988 /* 989 * If the tape density mandates (or even suggests) use of fixed 990 * or variable-length blocks, comply. 991 */ 992 switch (st->density) { 993 case HALFINCH_800: 994 case HALFINCH_1600: 995 case HALFINCH_6250: 996 case DDS: 997 st->flags &= ~ST_FIXEDBLOCKS; 998 st->blksize = 0; 999 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1000 ("density specified variable\n")); 1001 goto done; 1002 case QIC_11: 1003 case QIC_24: 1004 case QIC_120: 1005 case QIC_150: 1006 case QIC_525: 1007 case QIC_1320: 1008 case QIC_3095: 1009 case QIC_3220: 1010 st->flags |= ST_FIXEDBLOCKS; 1011 if (st->media_blksize > 0) 1012 st->blksize = st->media_blksize; 1013 else 1014 st->blksize = DEF_FIXED_BSIZE; 1015 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1016 ("density specified fixed\n")); 1017 goto done; 1018 } 1019 /* 1020 * If we're about to read the tape, perhaps we should choose 1021 * fixed or variable-length blocks and block size according to 1022 * what the drive found on the tape. 1023 */ 1024 if (first_read && 1025 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 1026 (st->media_blksize == DEF_FIXED_BSIZE) || 1027 (st->media_blksize == 1024))) { 1028 if (st->media_blksize > 0) 1029 st->flags |= ST_FIXEDBLOCKS; 1030 else 1031 st->flags &= ~ST_FIXEDBLOCKS; 1032 st->blksize = st->media_blksize; 1033 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1034 ("Used media_blksize of %d\n", st->media_blksize)); 1035 goto done; 1036 } 1037 /* 1038 * We're getting no hints from any direction. Choose variable- 1039 * length blocks arbitrarily. 1040 */ 1041 st->flags &= ~ST_FIXEDBLOCKS; 1042 st->blksize = 0; 1043 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1044 ("Give up and default to variable mode\n")); 1045 1046 done: 1047 /* 1048 * Decide whether or not to write two file marks to signify end- 1049 * of-data. Make the decision as a function of density. If 1050 * the decision is not to use a second file mark, the SCSI BLANK 1051 * CHECK condition code will be recognized as end-of-data when 1052 * first read. 1053 * (I think this should be a by-product of fixed/variable..julian) 1054 */ 1055 switch (st->density) { 1056 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 1057 case QIC_11: 1058 case QIC_24: 1059 case QIC_120: 1060 case QIC_150: 1061 case QIC_525: 1062 case QIC_1320: 1063 case QIC_3095: 1064 case QIC_3220: 1065 st->flags &= ~ST_2FM_AT_EOD; 1066 break; 1067 default: 1068 st->flags |= ST_2FM_AT_EOD; 1069 } 1070 return (0); 1071 } 1072 1073 /* 1074 * Actually translate the requested transfer into 1075 * one the physical driver can understand 1076 * The transfer is described by a buf and will include 1077 * only one physical transfer. 1078 */ 1079 static void 1080 ststrategy(struct buf *bp) 1081 { 1082 struct st_softc *st = st_cd.cd_devs[STUNIT(bp->b_dev)]; 1083 int s; 1084 1085 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1086 ("ststrategy %d bytes @ blk %" PRId64 "\n", bp->b_bcount, bp->b_blkno)); 1087 /* 1088 * If it's a null transfer, return immediatly 1089 */ 1090 if (bp->b_bcount == 0) 1091 goto done; 1092 1093 /* If offset is negative, error */ 1094 if (bp->b_blkno < 0) { 1095 bp->b_error = EINVAL; 1096 goto bad; 1097 } 1098 1099 /* 1100 * Odd sized request on fixed drives are verboten 1101 */ 1102 if (st->flags & ST_FIXEDBLOCKS) { 1103 if (bp->b_bcount % st->blksize) { 1104 printf("%s: bad request, must be multiple of %d\n", 1105 st->sc_dev.dv_xname, st->blksize); 1106 bp->b_error = EIO; 1107 goto bad; 1108 } 1109 } 1110 /* 1111 * as are out-of-range requests on variable drives. 1112 */ 1113 else if (bp->b_bcount < st->blkmin || 1114 (st->blkmax && bp->b_bcount > st->blkmax)) { 1115 printf("%s: bad request, must be between %d and %d\n", 1116 st->sc_dev.dv_xname, st->blkmin, st->blkmax); 1117 bp->b_error = EIO; 1118 goto bad; 1119 } 1120 s = splbio(); 1121 1122 /* 1123 * Place it in the queue of activities for this tape 1124 * at the end (a bit silly because we only have on user.. 1125 * (but it could fork())) 1126 */ 1127 BUFQ_PUT(&st->buf_queue, bp); 1128 1129 /* 1130 * Tell the device to get going on the transfer if it's 1131 * not doing anything, otherwise just wait for completion 1132 * (All a bit silly if we're only allowing 1 open but..) 1133 */ 1134 ststart(st->sc_periph); 1135 1136 splx(s); 1137 return; 1138 bad: 1139 bp->b_flags |= B_ERROR; 1140 done: 1141 /* 1142 * Correctly set the buf to indicate a completed xfer 1143 */ 1144 bp->b_resid = bp->b_bcount; 1145 biodone(bp); 1146 return; 1147 } 1148 1149 /* 1150 * ststart looks to see if there is a buf waiting for the device 1151 * and that the device is not already busy. If both are true, 1152 * It dequeues the buf and creates a scsi command to perform the 1153 * transfer required. The transfer request will call scsipi_done 1154 * on completion, which will in turn call this routine again 1155 * so that the next queued transfer is performed. 1156 * The bufs are queued by the strategy routine (ststrategy) 1157 * 1158 * This routine is also called after other non-queued requests 1159 * have been made of the scsi driver, to ensure that the queue 1160 * continues to be drained. 1161 * ststart() is called at splbio 1162 */ 1163 static void 1164 ststart(struct scsipi_periph *periph) 1165 { 1166 struct st_softc *st = (void *)periph->periph_dev; 1167 struct buf *bp; 1168 struct scsi_rw_tape cmd; 1169 struct scsipi_xfer *xs; 1170 int flags, error; 1171 1172 SC_DEBUG(periph, SCSIPI_DB2, ("ststart ")); 1173 /* 1174 * See if there is a buf to do and we are not already 1175 * doing one 1176 */ 1177 while (periph->periph_active < periph->periph_openings) { 1178 /* if a special awaits, let it proceed first */ 1179 if (periph->periph_flags & PERIPH_WAITING) { 1180 periph->periph_flags &= ~PERIPH_WAITING; 1181 wakeup((caddr_t)periph); 1182 return; 1183 } 1184 1185 /* 1186 * If the device has been unmounted by the user 1187 * then throw away all requests until done. 1188 */ 1189 if (__predict_false((st->flags & ST_MOUNTED) == 0 || 1190 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0)) { 1191 if ((bp = BUFQ_GET(&st->buf_queue)) != NULL) { 1192 /* make sure that one implies the other.. */ 1193 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 1194 bp->b_flags |= B_ERROR; 1195 bp->b_error = EIO; 1196 bp->b_resid = bp->b_bcount; 1197 biodone(bp); 1198 continue; 1199 } else { 1200 return; 1201 } 1202 } 1203 1204 if ((bp = BUFQ_PEEK(&st->buf_queue)) == NULL) 1205 return; 1206 1207 /* 1208 * only FIXEDBLOCK devices have pending I/O or space operations. 1209 */ 1210 if (st->flags & ST_FIXEDBLOCKS) { 1211 /* 1212 * If we are at a filemark but have not reported it yet 1213 * then we should report it now 1214 */ 1215 if (st->flags & ST_AT_FILEMARK) { 1216 if ((bp->b_flags & B_READ) == B_WRITE) { 1217 /* 1218 * Handling of ST_AT_FILEMARK in 1219 * st_space will fill in the right file 1220 * mark count. 1221 * Back up over filemark 1222 */ 1223 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1224 BUFQ_GET(&st->buf_queue); 1225 bp->b_flags |= B_ERROR; 1226 bp->b_error = EIO; 1227 biodone(bp); 1228 continue; 1229 } 1230 } else { 1231 BUFQ_GET(&st->buf_queue); 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 BUFQ_GET(&st->buf_queue); 1247 bp->b_resid = bp->b_bcount; 1248 if (st->flags & ST_EIO_PENDING) { 1249 bp->b_error = EIO; 1250 bp->b_flags |= B_ERROR; 1251 } 1252 st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); 1253 biodone(bp); 1254 continue; /* seek more work */ 1255 } 1256 1257 /* 1258 * Fill out the scsi command 1259 */ 1260 memset(&cmd, 0, sizeof(cmd)); 1261 flags = XS_CTL_NOSLEEP | XS_CTL_ASYNC; 1262 if ((bp->b_flags & B_READ) == B_WRITE) { 1263 cmd.opcode = WRITE; 1264 st->flags &= ~ST_FM_WRITTEN; 1265 flags |= XS_CTL_DATA_OUT; 1266 } else { 1267 cmd.opcode = READ; 1268 flags |= XS_CTL_DATA_IN; 1269 } 1270 1271 /* 1272 * Handle "fixed-block-mode" tape drives by using the 1273 * block count instead of the length. 1274 */ 1275 if (st->flags & ST_FIXEDBLOCKS) { 1276 cmd.byte2 |= SRW_FIXED; 1277 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1278 } else 1279 _lto3b(bp->b_bcount, cmd.len); 1280 1281 /* 1282 * Clear 'position updated' indicator 1283 */ 1284 st->flags &= ~ST_POSUPDATED; 1285 1286 /* 1287 * go ask the adapter to do all this for us 1288 */ 1289 xs = scsipi_make_xs(periph, 1290 (struct scsipi_generic *)&cmd, sizeof(cmd), 1291 (u_char *)bp->b_data, bp->b_bcount, 1292 0, ST_IO_TIME, bp, flags); 1293 if (__predict_false(xs == NULL)) { 1294 /* 1295 * out of memory. Keep this buffer in the queue, and 1296 * retry later. 1297 */ 1298 callout_reset(&st->sc_callout, hz / 2, strestart, 1299 periph); 1300 return; 1301 } 1302 /* 1303 * need to dequeue the buffer before queuing the command, 1304 * because cdstart may be called recursively from the 1305 * HBA driver 1306 */ 1307 #ifdef DIAGNOSTIC 1308 if (BUFQ_GET(&st->buf_queue) != bp) 1309 panic("ststart(): dequeued wrong buf"); 1310 #else 1311 BUFQ_GET(&st->buf_queue); 1312 #endif 1313 error = scsipi_execute_xs(xs); 1314 /* with a scsipi_xfer preallocated, scsipi_command can't fail */ 1315 KASSERT(error == 0); 1316 } /* go back and see if we can cram more work in.. */ 1317 } 1318 1319 static void 1320 strestart(void *v) 1321 { 1322 int s = splbio(); 1323 ststart((struct scsipi_periph *)v); 1324 splx(s); 1325 } 1326 1327 1328 static void 1329 stdone(struct scsipi_xfer *xs, int error) 1330 { 1331 struct st_softc *st = (void *)xs->xs_periph->periph_dev; 1332 struct buf *bp = xs->bp; 1333 1334 if (bp) { 1335 bp->b_error = error; 1336 bp->b_resid = xs->resid; 1337 if (error) 1338 bp->b_flags |= B_ERROR; 1339 1340 if ((bp->b_flags & B_READ) == B_WRITE) 1341 st->flags |= ST_WRITTEN; 1342 else 1343 st->flags &= ~ST_WRITTEN; 1344 #if NRND > 0 1345 rnd_add_uint32(&st->rnd_source, bp->b_blkno); 1346 #endif 1347 1348 if ((st->flags & ST_POSUPDATED) == 0) { 1349 if (error) { 1350 st->fileno = st->blkno = -1; 1351 } else if (st->blkno != -1) { 1352 if (st->flags & ST_FIXEDBLOCKS) 1353 st->blkno += 1354 (bp->b_bcount / st->blksize); 1355 else 1356 st->blkno++; 1357 } 1358 } 1359 1360 biodone(bp); 1361 } 1362 } 1363 1364 static int 1365 stread(dev_t dev, struct uio *uio, int iomode) 1366 { 1367 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1368 1369 return (physio(ststrategy, NULL, dev, B_READ, 1370 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1371 } 1372 1373 static int 1374 stwrite(dev_t dev, struct uio *uio, int iomode) 1375 { 1376 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1377 1378 return (physio(ststrategy, NULL, dev, B_WRITE, 1379 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1380 } 1381 1382 /* 1383 * Perform special action on behalf of the user; 1384 * knows about the internals of this device 1385 */ 1386 static int 1387 stioctl(dev_t dev, u_long cmd, caddr_t arg, int flag, struct proc *p) 1388 { 1389 int error = 0; 1390 int unit; 1391 int number, nmarks, dsty; 1392 int flags; 1393 struct st_softc *st; 1394 int hold_blksize; 1395 u_int8_t hold_density; 1396 struct mtop *mt = (struct mtop *) arg; 1397 1398 /* 1399 * Find the device that the user is talking about 1400 */ 1401 flags = 0; /* give error messages, act on errors etc. */ 1402 unit = STUNIT(dev); 1403 dsty = STDSTY(dev); 1404 st = st_cd.cd_devs[unit]; 1405 hold_blksize = st->blksize; 1406 hold_density = st->density; 1407 1408 switch ((u_int) cmd) { 1409 1410 case MTIOCGET: { 1411 struct mtget *g = (struct mtget *) arg; 1412 /* 1413 * (to get the current state of READONLY) 1414 */ 1415 error = st->ops(st, ST_OPS_MODESENSE, XS_CTL_SILENT); 1416 if (error) { 1417 /* 1418 * Ignore the error if in control mode; 1419 * this is mandated by st(4). 1420 */ 1421 if (STMODE(dev) != CTRL_MODE) 1422 break; 1423 error = 0; 1424 } 1425 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("[ioctl: get status]\n")); 1426 memset(g, 0, sizeof(struct mtget)); 1427 g->mt_type = 0x7; /* Ultrix compat *//*? */ 1428 g->mt_blksiz = st->blksize; 1429 g->mt_density = st->density; 1430 g->mt_mblksiz[0] = st->modes[0].blksize; 1431 g->mt_mblksiz[1] = st->modes[1].blksize; 1432 g->mt_mblksiz[2] = st->modes[2].blksize; 1433 g->mt_mblksiz[3] = st->modes[3].blksize; 1434 g->mt_mdensity[0] = st->modes[0].density; 1435 g->mt_mdensity[1] = st->modes[1].density; 1436 g->mt_mdensity[2] = st->modes[2].density; 1437 g->mt_mdensity[3] = st->modes[3].density; 1438 g->mt_fileno = st->fileno; 1439 g->mt_blkno = st->blkno; 1440 if (st->flags & ST_READONLY) 1441 g->mt_dsreg |= MT_DS_RDONLY; 1442 if (st->flags & ST_MOUNTED) 1443 g->mt_dsreg |= MT_DS_MOUNTED; 1444 g->mt_resid = st->mt_resid; 1445 g->mt_erreg = st->mt_erreg; 1446 /* 1447 * clear latched errors. 1448 */ 1449 st->mt_resid = 0; 1450 st->mt_erreg = 0; 1451 st->asc = 0; 1452 st->ascq = 0; 1453 break; 1454 } 1455 case MTIOCTOP: { 1456 1457 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1458 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1459 mt->mt_count)); 1460 1461 /* compat: in U*x it is a short */ 1462 number = mt->mt_count; 1463 switch ((short) (mt->mt_op)) { 1464 case MTWEOF: /* write an end-of-file record */ 1465 error = st_write_filemarks(st, number, flags); 1466 break; 1467 case MTBSF: /* backward space file */ 1468 number = -number; 1469 case MTFSF: /* forward space file */ 1470 error = st_check_eod(st, FALSE, &nmarks, flags); 1471 if (!error) 1472 error = st_space(st, number - nmarks, 1473 SP_FILEMARKS, flags); 1474 break; 1475 case MTBSR: /* backward space record */ 1476 number = -number; 1477 case MTFSR: /* forward space record */ 1478 error = st_check_eod(st, TRUE, &nmarks, flags); 1479 if (!error) 1480 error = st_space(st, number, SP_BLKS, flags); 1481 break; 1482 case MTREW: /* rewind */ 1483 error = st_rewind(st, 0, flags); 1484 break; 1485 case MTOFFL: /* rewind and put the drive offline */ 1486 st_unmount(st, EJECT); 1487 break; 1488 case MTNOP: /* no operation, sets status only */ 1489 break; 1490 case MTRETEN: /* retension the tape */ 1491 error = st_load(st, LD_RETENSION, flags); 1492 if (!error) 1493 error = st_load(st, LD_LOAD, flags); 1494 break; 1495 case MTEOM: /* forward space to end of media */ 1496 error = st_check_eod(st, FALSE, &nmarks, flags); 1497 if (!error) 1498 error = st_space(st, 1, SP_EOM, flags); 1499 break; 1500 case MTCACHE: /* enable controller cache */ 1501 st->flags &= ~ST_DONTBUFFER; 1502 goto try_new_value; 1503 case MTNOCACHE: /* disable controller cache */ 1504 st->flags |= ST_DONTBUFFER; 1505 goto try_new_value; 1506 case MTERASE: /* erase volume */ 1507 error = st_erase(st, number, flags); 1508 break; 1509 case MTSETBSIZ: /* Set block size for device */ 1510 #ifdef NOTYET 1511 if (!(st->flags & ST_NEW_MOUNT)) { 1512 uprintf("re-mount tape before changing blocksize"); 1513 error = EINVAL; 1514 break; 1515 } 1516 #endif 1517 if (number == 0) 1518 st->flags &= ~ST_FIXEDBLOCKS; 1519 else { 1520 if ((st->blkmin || st->blkmax) && 1521 (number < st->blkmin || 1522 number > st->blkmax)) { 1523 error = EINVAL; 1524 break; 1525 } 1526 st->flags |= ST_FIXEDBLOCKS; 1527 } 1528 st->blksize = number; 1529 st->flags |= ST_BLOCK_SET; /*XXX */ 1530 goto try_new_value; 1531 1532 case MTSETDNSTY: /* Set density for device and mode */ 1533 /* 1534 * Any number >= 0 and <= 0xff is legal. Numbers 1535 * above 0x80 are 'vendor unique'. 1536 */ 1537 if (number < 0 || number > 255) { 1538 error = EINVAL; 1539 break; 1540 } else 1541 st->density = number; 1542 goto try_new_value; 1543 1544 case MTCMPRESS: 1545 error = st->ops(st, (number == 0) ? 1546 ST_OPS_CMPRSS_OFF : ST_OPS_CMPRSS_ON, 1547 XS_CTL_SILENT); 1548 break; 1549 1550 case MTEWARN: 1551 if (number) 1552 st->flags |= ST_EARLYWARN; 1553 else 1554 st->flags &= ~ST_EARLYWARN; 1555 break; 1556 1557 default: 1558 error = EINVAL; 1559 } 1560 break; 1561 } 1562 case MTIOCIEOT: 1563 case MTIOCEEOT: 1564 break; 1565 1566 case MTIOCRDSPOS: 1567 error = st_rdpos(st, 0, (u_int32_t *) arg); 1568 break; 1569 1570 case MTIOCRDHPOS: 1571 error = st_rdpos(st, 1, (u_int32_t *) arg); 1572 break; 1573 1574 case MTIOCSLOCATE: 1575 error = st_setpos(st, 0, (u_int32_t *) arg); 1576 break; 1577 1578 case MTIOCHLOCATE: 1579 error = st_setpos(st, 1, (u_int32_t *) arg); 1580 break; 1581 1582 1583 default: 1584 error = scsipi_do_ioctl(st->sc_periph, dev, cmd, arg, 1585 flag, p); 1586 break; 1587 } 1588 return (error); 1589 /*-----------------------------*/ 1590 try_new_value: 1591 /* 1592 * Check that the mode being asked for is aggreeable to the 1593 * drive. If not, put it back the way it was. 1594 * 1595 * If in control mode, we can make (persistent) mode changes 1596 * even if no medium is loaded (see st(4)). 1597 */ 1598 if ((STMODE(dev) != CTRL_MODE || (st->flags & ST_MOUNTED) != 0) && 1599 (error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 1600 /* put it back as it was */ 1601 printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); 1602 st->density = hold_density; 1603 st->blksize = hold_blksize; 1604 if (st->blksize) 1605 st->flags |= ST_FIXEDBLOCKS; 1606 else 1607 st->flags &= ~ST_FIXEDBLOCKS; 1608 return (error); 1609 } 1610 /* 1611 * As the drive liked it, if we are setting a new default, 1612 * set it into the structures as such. 1613 * 1614 * The means for deciding this are not finalised yet- but 1615 * if the device was opened in Control Mode, the values 1616 * are persistent now across mounts. 1617 */ 1618 if (STMODE(dev) == CTRL_MODE) { 1619 switch ((short) (mt->mt_op)) { 1620 case MTSETBSIZ: 1621 st->modes[dsty].blksize = st->blksize; 1622 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1623 break; 1624 case MTSETDNSTY: 1625 st->modes[dsty].density = st->density; 1626 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1627 break; 1628 } 1629 } 1630 return (0); 1631 } 1632 1633 /* 1634 * Do a synchronous read. 1635 */ 1636 static int 1637 st_read(struct st_softc *st, char *buf, int size, int flags) 1638 { 1639 struct scsi_rw_tape cmd; 1640 1641 /* 1642 * If it's a null transfer, return immediatly 1643 */ 1644 if (size == 0) 1645 return (0); 1646 memset(&cmd, 0, sizeof(cmd)); 1647 cmd.opcode = READ; 1648 if (st->flags & ST_FIXEDBLOCKS) { 1649 cmd.byte2 |= SRW_FIXED; 1650 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1651 cmd.len); 1652 } else 1653 _lto3b(size, cmd.len); 1654 return (scsipi_command(st->sc_periph, 1655 (void *)&cmd, sizeof(cmd), (void *)buf, size, 0, ST_IO_TIME, NULL, 1656 flags | XS_CTL_DATA_IN)); 1657 } 1658 1659 /* 1660 * issue an erase command 1661 */ 1662 static int 1663 st_erase(struct st_softc *st, int full, int flags) 1664 { 1665 int tmo; 1666 struct scsi_erase cmd; 1667 1668 /* 1669 * Full erase means set LONG bit in erase command, which asks 1670 * the drive to erase the entire unit. Without this bit, we're 1671 * asking the drive to write an erase gap. 1672 */ 1673 memset(&cmd, 0, sizeof(cmd)); 1674 cmd.opcode = ERASE; 1675 if (full) { 1676 cmd.byte2 = SE_LONG; 1677 tmo = ST_SPC_TIME; 1678 } else { 1679 tmo = ST_IO_TIME; 1680 } 1681 1682 /* 1683 * XXX We always do this asynchronously, for now, unless the device 1684 * has the ST_Q_ERASE_NOIMM quirk. How long should we wait if we 1685 * want to (eventually) to it synchronously? 1686 */ 1687 if ((st->quirks & ST_Q_ERASE_NOIMM) == 0) 1688 cmd.byte2 |= SE_IMMED; 1689 1690 return (scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1691 ST_RETRIES, tmo, NULL, flags)); 1692 } 1693 1694 /* 1695 * skip N blocks/filemarks/seq filemarks/eom 1696 */ 1697 static int 1698 st_space(struct st_softc *st, int number, u_int what, int flags) 1699 { 1700 struct scsi_space cmd; 1701 int error; 1702 1703 switch (what) { 1704 case SP_BLKS: 1705 if (st->flags & ST_PER_ACTION) { 1706 if (number > 0) { 1707 st->flags &= ~ST_PER_ACTION; 1708 return (EIO); 1709 } else if (number < 0) { 1710 if (st->flags & ST_AT_FILEMARK) { 1711 /* 1712 * Handling of ST_AT_FILEMARK 1713 * in st_space will fill in the 1714 * right file mark count. 1715 */ 1716 error = st_space(st, 0, SP_FILEMARKS, 1717 flags); 1718 if (error) 1719 return (error); 1720 } 1721 if (st->flags & ST_BLANK_READ) { 1722 st->flags &= ~ST_BLANK_READ; 1723 return (EIO); 1724 } 1725 st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); 1726 } 1727 } 1728 break; 1729 case SP_FILEMARKS: 1730 if (st->flags & ST_EIO_PENDING) { 1731 if (number > 0) { 1732 /* pretend we just discovered the error */ 1733 st->flags &= ~ST_EIO_PENDING; 1734 return (EIO); 1735 } else if (number < 0) { 1736 /* back away from the error */ 1737 st->flags &= ~ST_EIO_PENDING; 1738 } 1739 } 1740 if (st->flags & ST_AT_FILEMARK) { 1741 st->flags &= ~ST_AT_FILEMARK; 1742 number--; 1743 } 1744 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 1745 /* back away from unwritten tape */ 1746 st->flags &= ~ST_BLANK_READ; 1747 number++; /* XXX dubious */ 1748 } 1749 break; 1750 case SP_EOM: 1751 if (st->flags & ST_EOM_PENDING) { 1752 /* we're already there */ 1753 st->flags &= ~ST_EOM_PENDING; 1754 return (0); 1755 } 1756 if (st->flags & ST_EIO_PENDING) { 1757 /* pretend we just discovered the error */ 1758 st->flags &= ~ST_EIO_PENDING; 1759 return (EIO); 1760 } 1761 if (st->flags & ST_AT_FILEMARK) 1762 st->flags &= ~ST_AT_FILEMARK; 1763 break; 1764 } 1765 if (number == 0) 1766 return (0); 1767 1768 memset(&cmd, 0, sizeof(cmd)); 1769 cmd.opcode = SPACE; 1770 cmd.byte2 = what; 1771 _lto3b(number, cmd.number); 1772 1773 st->flags &= ~ST_POSUPDATED; 1774 st->last_ctl_resid = 0; 1775 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1776 0, ST_SPC_TIME, NULL, flags); 1777 1778 if (error == 0 && (st->flags & ST_POSUPDATED) == 0) { 1779 number = number - st->last_ctl_resid; 1780 if (what == SP_BLKS) { 1781 if (st->blkno != -1) { 1782 st->blkno += number; 1783 } 1784 } else if (what == SP_FILEMARKS) { 1785 if (st->fileno != -1) { 1786 st->fileno += number; 1787 if (number > 0) { 1788 st->blkno = 0; 1789 } else if (number < 0) { 1790 st->blkno = -1; 1791 } 1792 } 1793 } else if (what == SP_EOM) { 1794 /* 1795 * This loses us relative position. 1796 */ 1797 st->fileno = st->blkno = -1; 1798 } 1799 } 1800 return (error); 1801 } 1802 1803 /* 1804 * write N filemarks 1805 */ 1806 static int 1807 st_write_filemarks(struct st_softc *st, int number, int flags) 1808 { 1809 int error; 1810 struct scsi_write_filemarks cmd; 1811 1812 /* 1813 * It's hard to write a negative number of file marks. 1814 * Don't try. 1815 */ 1816 if (number < 0) 1817 return (EINVAL); 1818 switch (number) { 1819 case 0: /* really a command to sync the drive's buffers */ 1820 break; 1821 case 1: 1822 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 1823 st->flags &= ~ST_WRITTEN; 1824 else 1825 st->flags |= ST_FM_WRITTEN; 1826 st->flags &= ~ST_PER_ACTION; 1827 break; 1828 default: 1829 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 1830 } 1831 1832 memset(&cmd, 0, sizeof(cmd)); 1833 cmd.opcode = WRITE_FILEMARKS; 1834 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1835 cmd.byte2 = SR_IMMED; 1836 /* 1837 * The ATAPI Onstream DI-30 doesn't support writing filemarks, but 1838 * WRITE_FILEMARKS is still used to flush the buffer 1839 */ 1840 if ((st->quirks & ST_Q_NOFILEMARKS) == 0) 1841 _lto3b(number, cmd.number); 1842 1843 /* XXX WE NEED TO BE ABLE TO GET A RESIDIUAL XXX */ 1844 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1845 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 static int 1861 st_check_eod(struct st_softc *st, boolean position, int *nmarks, int flags) 1862 { 1863 int error; 1864 1865 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 1866 default: 1867 *nmarks = 0; 1868 return (0); 1869 case ST_WRITTEN: 1870 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 1871 *nmarks = 1; 1872 break; 1873 case ST_WRITTEN | ST_2FM_AT_EOD: 1874 *nmarks = 2; 1875 } 1876 error = st_write_filemarks(st, *nmarks, flags); 1877 if (position && !error) 1878 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 1879 return (error); 1880 } 1881 1882 /* 1883 * load/unload/retension 1884 */ 1885 static int 1886 st_load(struct st_softc *st, u_int type, 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, (void *)&cmd, sizeof(cmd), 0, 0, 1918 ST_RETRIES, ST_SPC_TIME, NULL, flags); 1919 if (error) { 1920 printf("%s: error %d in st_load (op %d)\n", 1921 st->sc_dev.dv_xname, error, type); 1922 } 1923 return (error); 1924 } 1925 1926 /* 1927 * Rewind the device 1928 */ 1929 static int 1930 st_rewind(struct st_softc *st, u_int immediate, int flags) 1931 { 1932 struct scsi_rewind cmd; 1933 int error; 1934 int nmarks; 1935 1936 error = st_check_eod(st, FALSE, &nmarks, flags); 1937 if (error) { 1938 printf("%s: failed to write closing filemarks at " 1939 "rewind, errno=%d\n", st->sc_dev.dv_xname, error); 1940 return (error); 1941 } 1942 st->flags &= ~ST_PER_ACTION; 1943 1944 /* 1945 * ATAPI tapes always need immediate to be set 1946 */ 1947 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1948 immediate = SR_IMMED; 1949 1950 memset(&cmd, 0, sizeof(cmd)); 1951 cmd.opcode = REWIND; 1952 cmd.byte2 = immediate; 1953 1954 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1955 ST_RETRIES, immediate ? ST_CTL_TIME: ST_SPC_TIME, NULL, flags); 1956 if (error) { 1957 printf("%s: error %d trying to rewind\n", 1958 st->sc_dev.dv_xname, error); 1959 /* lost position */ 1960 st->fileno = st->blkno = -1; 1961 } else { 1962 st->fileno = st->blkno = 0; 1963 } 1964 return (error); 1965 } 1966 1967 static int 1968 st_rdpos(struct st_softc *st, int hard, u_int32_t *blkptr) 1969 { 1970 int error; 1971 u_int8_t posdata[20]; 1972 struct scsi_tape_read_position cmd; 1973 1974 /* 1975 * We try and flush any buffered writes here if we were writing 1976 * and we're trying to get hardware block position. It eats 1977 * up performance substantially, but I'm wary of drive firmware. 1978 * 1979 * I think that *logical* block position is probably okay- 1980 * but hardware block position might have to wait for data 1981 * to hit media to be valid. Caveat Emptor. 1982 */ 1983 1984 if (hard && (st->flags & ST_WRITTEN)) { 1985 /* 1986 * First flush any pending writes... 1987 */ 1988 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 1989 /* 1990 * The latter case is for 'write protected' tapes 1991 * which are too stupid to recognize a zero count 1992 * for writing filemarks as a no-op. 1993 */ 1994 if (error != 0 && error != EACCES && error != EROFS) 1995 return (error); 1996 } 1997 1998 memset(&cmd, 0, sizeof(cmd)); 1999 memset(&posdata, 0, sizeof(posdata)); 2000 cmd.opcode = READ_POSITION; 2001 if (hard) 2002 cmd.byte1 = 1; 2003 2004 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 2005 (void *)&posdata, sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, 2006 XS_CTL_SILENT | XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); 2007 2008 if (error == 0) { 2009 #if 0 2010 printf("posdata:"); 2011 for (hard = 0; hard < sizeof(posdata); hard++) 2012 printf("%02x ", posdata[hard] & 0xff); 2013 printf("\n"); 2014 #endif 2015 if (posdata[0] & 0x4) /* Block Position Unknown */ 2016 error = EINVAL; 2017 else 2018 *blkptr = _4btol(&posdata[4]); 2019 } 2020 return (error); 2021 } 2022 2023 static int 2024 st_setpos(struct st_softc *st, int hard, u_int32_t *blkptr) 2025 { 2026 int error; 2027 struct scsi_tape_locate cmd; 2028 2029 /* 2030 * We used to try and flush any buffered writes here. 2031 * Now we push this onto user applications to either 2032 * flush the pending writes themselves (via a zero count 2033 * WRITE FILEMARKS command) or they can trust their tape 2034 * drive to do this correctly for them. 2035 * 2036 * There are very ugly performance limitations otherwise. 2037 */ 2038 2039 memset(&cmd, 0, sizeof(cmd)); 2040 cmd.opcode = LOCATE; 2041 if (hard) 2042 cmd.byte2 = 1 << 2; 2043 _lto4b(*blkptr, cmd.blkaddr); 2044 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 2045 ST_RETRIES, ST_SPC_TIME, NULL, 0); 2046 /* 2047 * Note file && block number position now unknown (if 2048 * these things ever start being maintained in this driver) 2049 */ 2050 st->fileno = st->blkno = -1; 2051 return (error); 2052 } 2053 2054 2055 /* 2056 * Look at the returned sense and act on the error and determine 2057 * the unix error number to pass back..., 0 (== report no error), 2058 * -1 = retry the operation, -2 continue error processing. 2059 */ 2060 static int 2061 st_interpret_sense(struct scsipi_xfer *xs) 2062 { 2063 struct scsipi_periph *periph = xs->xs_periph; 2064 struct scsipi_sense_data *sense = &xs->sense.scsi_sense; 2065 struct buf *bp = xs->bp; 2066 struct st_softc *st = (void *)periph->periph_dev; 2067 int retval = EJUSTRETURN; 2068 int doprint = ((xs->xs_control & XS_CTL_SILENT) == 0); 2069 u_int8_t key; 2070 int32_t info; 2071 2072 /* 2073 * If it isn't a extended or extended/deferred error, let 2074 * the generic code handle it. 2075 */ 2076 if ((sense->error_code & SSD_ERRCODE) != 0x70 && 2077 (sense->error_code & SSD_ERRCODE) != 0x71) { /* DEFFERRED */ 2078 return (retval); 2079 } 2080 2081 if (sense->error_code & SSD_ERRCODE_VALID) 2082 info = _4btol(sense->info); 2083 else 2084 info = (st->flags & ST_FIXEDBLOCKS) ? 2085 xs->datalen / st->blksize : xs->datalen; 2086 key = sense->flags & SSD_KEY; 2087 st->mt_erreg = key; 2088 st->asc = sense->add_sense_code; 2089 st->ascq = sense->add_sense_code_qual; 2090 st->mt_resid = (short) info; 2091 2092 if (key == SKEY_NOT_READY && st->asc == 0x4 && st->ascq == 0x1) { 2093 /* Not Ready, Logical Unit Is in Process Of Becoming Ready */ 2094 if (!callout_pending(&periph->periph_callout)) 2095 scsipi_periph_freeze(periph, 1); 2096 callout_reset(&periph->periph_callout, 2097 hz, scsipi_periph_timed_thaw, periph); 2098 return (ERESTART); 2099 } 2100 2101 /* 2102 * If the device is not open yet, let generic handle 2103 */ 2104 if ((periph->periph_flags & PERIPH_OPEN) == 0) { 2105 return (retval); 2106 } 2107 2108 xs->resid = info; 2109 if (st->flags & ST_FIXEDBLOCKS) { 2110 if (bp) { 2111 xs->resid *= st->blksize; 2112 st->last_io_resid = xs->resid; 2113 } else { 2114 st->last_ctl_resid = xs->resid; 2115 } 2116 if (key == SKEY_VOLUME_OVERFLOW) { 2117 st->flags |= ST_EIO_PENDING; 2118 if (bp) 2119 bp->b_resid = xs->resid; 2120 } else if (sense->flags & SSD_EOM) { 2121 if ((st->flags & ST_EARLYWARN) == 0) 2122 st->flags |= ST_EIO_PENDING; 2123 st->flags |= ST_EOM_PENDING; 2124 if (bp) { 2125 #if 0 2126 bp->b_resid = xs->resid; 2127 #else 2128 /* 2129 * Grotesque as it seems, the few times 2130 * I've actually seen a non-zero resid, 2131 * the tape drive actually lied and had 2132 * written all the data! 2133 */ 2134 bp->b_resid = 0; 2135 #endif 2136 } 2137 } 2138 if (sense->flags & SSD_FILEMARK) { 2139 st->flags |= ST_AT_FILEMARK; 2140 if (bp) 2141 bp->b_resid = xs->resid; 2142 if (st->fileno != (daddr_t) -1) { 2143 st->fileno++; 2144 st->blkno = 0; 2145 st->flags |= ST_POSUPDATED; 2146 } 2147 } 2148 if (sense->flags & SSD_ILI) { 2149 st->flags |= ST_EIO_PENDING; 2150 if (bp) 2151 bp->b_resid = xs->resid; 2152 if (sense->error_code & SSD_ERRCODE_VALID && 2153 (xs->xs_control & XS_CTL_SILENT) == 0) 2154 printf("%s: block wrong size, %d blocks " 2155 "residual\n", st->sc_dev.dv_xname, info); 2156 2157 /* 2158 * This quirk code helps the drive read 2159 * the first tape block, regardless of 2160 * format. That is required for these 2161 * drives to return proper MODE SENSE 2162 * information. 2163 */ 2164 if ((st->quirks & ST_Q_SENSE_HELP) && 2165 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 2166 st->blksize -= 512; 2167 else if ((st->flags & ST_POSUPDATED) == 0) { 2168 if (st->blkno != (daddr_t) -1) { 2169 st->blkno += 2170 (xs->datalen / st->blksize); 2171 st->flags |= ST_POSUPDATED; 2172 } 2173 } 2174 } 2175 /* 2176 * If data wanted and no data was transferred, do it immediately 2177 */ 2178 if (xs->datalen && xs->resid >= xs->datalen) { 2179 if (st->flags & ST_EIO_PENDING) 2180 return (EIO); 2181 if (st->flags & ST_AT_FILEMARK) { 2182 if (bp) 2183 bp->b_resid = xs->resid; 2184 return (0); 2185 } 2186 } 2187 } else { /* must be variable mode */ 2188 if (bp) { 2189 st->last_io_resid = xs->resid; 2190 } else { 2191 st->last_ctl_resid = xs->resid; 2192 } 2193 if (sense->flags & SSD_EOM) { 2194 /* 2195 * The current semantics of this 2196 * driver requires EOM detection 2197 * to return EIO unless early 2198 * warning detection is enabled 2199 * for variable mode (this is always 2200 * on for fixed block mode). 2201 */ 2202 if (st->flags & ST_EARLYWARN) { 2203 st->flags |= ST_EOM_PENDING; 2204 retval = 0; 2205 } else { 2206 retval = EIO; 2207 } 2208 2209 /* 2210 * If it's an unadorned EOM detection, 2211 * suppress printing an error. 2212 */ 2213 if (key == SKEY_NO_SENSE) { 2214 doprint = 0; 2215 } 2216 } else if (sense->flags & SSD_FILEMARK) { 2217 retval = 0; 2218 if (st->fileno != (daddr_t) -1) { 2219 st->fileno++; 2220 st->blkno = 0; 2221 st->flags |= ST_POSUPDATED; 2222 } 2223 } else if (sense->flags & SSD_ILI) { 2224 if (info < 0) { 2225 /* 2226 * The tape record was bigger than the read 2227 * we issued. 2228 */ 2229 if ((xs->xs_control & XS_CTL_SILENT) == 0) { 2230 printf("%s: %d-byte tape record too big" 2231 " for %d-byte user buffer\n", 2232 st->sc_dev.dv_xname, 2233 xs->datalen - info, xs->datalen); 2234 } 2235 retval = EIO; 2236 } else { 2237 retval = 0; 2238 if (st->blkno != (daddr_t) -1) { 2239 st->blkno++; 2240 st->flags |= ST_POSUPDATED; 2241 } 2242 } 2243 } 2244 if (bp) 2245 bp->b_resid = info; 2246 } 2247 2248 #ifndef SCSIPI_DEBUG 2249 if (retval == 0 && key == SKEY_NO_SENSE) 2250 doprint = 0; 2251 #endif 2252 if (key == SKEY_BLANK_CHECK) { 2253 /* 2254 * This quirk code helps the drive read the 2255 * first tape block, regardless of format. That 2256 * is required for these drives to return proper 2257 * MODE SENSE information. 2258 */ 2259 if ((st->quirks & ST_Q_SENSE_HELP) && 2260 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 2261 /* still starting */ 2262 st->blksize -= 512; 2263 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 2264 st->flags |= ST_BLANK_READ; 2265 xs->resid = xs->datalen; 2266 if (bp) { 2267 bp->b_resid = xs->resid; 2268 /* return an EOF */ 2269 } 2270 retval = 0; 2271 /* lost position */ 2272 st->fileno = st->blkno = -1; 2273 } 2274 } 2275 2276 /* 2277 * If generic sense processing will continue, we should not 2278 * print sense info here. 2279 */ 2280 if (retval == EJUSTRETURN) 2281 doprint = 0; 2282 2283 if (doprint) { 2284 #ifdef SCSIVERBOSE 2285 scsipi_print_sense(xs, 0); 2286 #else 2287 scsipi_printaddr(periph); 2288 printf("Sense Key 0x%02x", key); 2289 if ((sense->error_code & SSD_ERRCODE_VALID) != 0) { 2290 switch (key) { 2291 case SKEY_NOT_READY: 2292 case SKEY_ILLEGAL_REQUEST: 2293 case SKEY_UNIT_ATTENTION: 2294 case SKEY_WRITE_PROTECT: 2295 break; 2296 case SKEY_VOLUME_OVERFLOW: 2297 case SKEY_BLANK_CHECK: 2298 printf(", requested size: %d (decimal)", info); 2299 break; 2300 case SKEY_ABORTED_COMMAND: 2301 if (xs->xs_retries) 2302 printf(", retrying"); 2303 printf(", cmd 0x%x, info 0x%x", 2304 xs->cmd->opcode, info); 2305 break; 2306 default: 2307 printf(", info = %d (decimal)", info); 2308 } 2309 } 2310 if (sense->extra_len != 0) { 2311 int n; 2312 printf(", data ="); 2313 for (n = 0; n < sense->extra_len; n++) 2314 printf(" %02x", sense->cmd_spec_info[n]); 2315 } 2316 printf("\n"); 2317 #endif 2318 } 2319 return (retval); 2320 } 2321 2322 /* 2323 * The quirk here is that the drive returns some value to st_mode_sense 2324 * incorrectly until the tape has actually passed by the head. 2325 * 2326 * The method is to set the drive to large fixed-block state (user-specified 2327 * density and 1024-byte blocks), then read and rewind to get it to sense the 2328 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 2329 * work, as a last resort, try variable- length blocks. The result will be 2330 * the ability to do an accurate st_mode_sense. 2331 * 2332 * We know we can do a rewind because we just did a load, which implies rewind. 2333 * Rewind seems preferable to space backward if we have a virgin tape. 2334 * 2335 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 2336 * error processing, both part of st_interpret_sense. 2337 */ 2338 static int 2339 st_touch_tape(struct st_softc *st) 2340 { 2341 char *buf; 2342 int readsize; 2343 int error; 2344 2345 buf = malloc(1024, M_TEMP, M_NOWAIT); 2346 if (buf == NULL) 2347 return (ENOMEM); 2348 2349 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 2350 goto bad; 2351 2352 /* 2353 * If the block size is already known from the 2354 * sense data, use it. Else start probing at 1024. 2355 */ 2356 if (st->media_blksize > 0) 2357 st->blksize = st->media_blksize; 2358 else 2359 st->blksize = 1024; 2360 2361 do { 2362 switch (st->blksize) { 2363 case 512: 2364 case 1024: 2365 readsize = st->blksize; 2366 st->flags |= ST_FIXEDBLOCKS; 2367 break; 2368 default: 2369 readsize = 1; 2370 st->flags &= ~ST_FIXEDBLOCKS; 2371 } 2372 if ((error = st->ops(st, ST_OPS_MODESELECT, XS_CTL_SILENT)) 2373 != 0) { 2374 /* 2375 * The device did not agree with the proposed 2376 * block size. If we exhausted our options, 2377 * return failure, else try another. 2378 */ 2379 if (readsize == 1) 2380 goto bad; 2381 st->blksize -= 512; 2382 continue; 2383 } 2384 st_read(st, buf, readsize, XS_CTL_SILENT); /* XXX */ 2385 if ((error = st_rewind(st, 0, 0)) != 0) { 2386 bad: free(buf, M_TEMP); 2387 return (error); 2388 } 2389 } while (readsize != 1 && readsize > st->blksize); 2390 2391 free(buf, M_TEMP); 2392 return (0); 2393 } 2394 2395 static int 2396 stdump(dev_t dev, daddr_t blkno, caddr_t va, size_t size) 2397 { 2398 2399 /* Not implemented. */ 2400 return (ENXIO); 2401 } 2402