1 /* $NetBSD: st.c,v 1.204 2008/04/28 20:23:58 martin 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Originally written by Julian Elischer (julian@tfs.com) 34 * for TRW Financial Systems for use under the MACH(2.5) operating system. 35 * 36 * TRW Financial Systems, in accordance with their agreement with Carnegie 37 * Mellon University, makes this software available to CMU to distribute 38 * or use in any manner that they see fit as long as this message is kept with 39 * the software. For this reason TFS also grants any other persons or 40 * organisations permission to use or modify this software. 41 * 42 * TFS supplies this software to be publicly redistributed 43 * on the understanding that TFS is not responsible for the correct 44 * functioning of this software in any circumstances. 45 * 46 * Ported to run under 386BSD by Julian Elischer (julian@tfs.com) Sept 1992 47 * major changes by Julian Elischer (julian@jules.dialix.oz.au) May 1993 48 * 49 * A lot of rewhacking done by mjacob (mjacob@nas.nasa.gov). 50 */ 51 52 #include <sys/cdefs.h> 53 __KERNEL_RCSID(0, "$NetBSD: st.c,v 1.204 2008/04/28 20:23:58 martin Exp $"); 54 55 #include "opt_scsi.h" 56 57 #include <sys/param.h> 58 #include <sys/systm.h> 59 #include <sys/fcntl.h> 60 #include <sys/errno.h> 61 #include <sys/ioctl.h> 62 #include <sys/malloc.h> 63 #include <sys/buf.h> 64 #include <sys/bufq.h> 65 #include <sys/proc.h> 66 #include <sys/user.h> 67 #include <sys/mtio.h> 68 #include <sys/device.h> 69 #include <sys/conf.h> 70 #include <sys/kernel.h> 71 #include <sys/vnode.h> 72 #include <sys/iostat.h> 73 #include <sys/sysctl.h> 74 75 #include <dev/scsipi/scsi_spc.h> 76 #include <dev/scsipi/scsipi_all.h> 77 #include <dev/scsipi/scsi_all.h> 78 #include <dev/scsipi/scsi_tape.h> 79 #include <dev/scsipi/scsipiconf.h> 80 #include <dev/scsipi/scsipi_base.h> 81 #include <dev/scsipi/stvar.h> 82 83 /* Defines for device specific stuff */ 84 #define DEF_FIXED_BSIZE 512 85 86 #define STMODE(z) ( minor(z) & 0x03) 87 #define STDSTY(z) ((minor(z) >> 2) & 0x03) 88 #define STUNIT(z) ((minor(z) >> 4) ) 89 #define STNMINOR 16 90 91 #define NORMAL_MODE 0 92 #define NOREW_MODE 1 93 #define EJECT_MODE 2 94 #define CTRL_MODE 3 95 96 #ifndef ST_MOUNT_DELAY 97 #define ST_MOUNT_DELAY 0 98 #endif 99 100 static dev_type_open(stopen); 101 static dev_type_close(stclose); 102 static dev_type_read(stread); 103 static dev_type_write(stwrite); 104 static dev_type_ioctl(stioctl); 105 static dev_type_strategy(ststrategy); 106 static dev_type_dump(stdump); 107 108 const struct bdevsw st_bdevsw = { 109 stopen, stclose, ststrategy, stioctl, stdump, nosize, D_TAPE 110 }; 111 112 const struct cdevsw st_cdevsw = { 113 stopen, stclose, stread, stwrite, stioctl, 114 nostop, notty, nopoll, nommap, nokqfilter, D_TAPE 115 }; 116 117 /* 118 * Define various devices that we know mis-behave in some way, 119 * and note how they are bad, so we can correct for them 120 */ 121 122 static const struct st_quirk_inquiry_pattern st_quirk_patterns[] = { 123 {{T_SEQUENTIAL, T_REMOV, 124 " ", " ", " "}, {0, 0, { 125 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 126 {ST_Q_FORCE_BLKSIZE, 512, QIC_24}, /* minor 4-7 */ 127 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_1600}, /* minor 8-11 */ 128 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_6250} /* minor 12-15 */ 129 }}}, 130 {{T_SEQUENTIAL, T_REMOV, 131 "TANDBERG", " TDC 3600 ", ""}, {0, 12, { 132 {0, 0, 0}, /* minor 0-3 */ 133 {ST_Q_FORCE_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 134 {0, 0, QIC_150}, /* minor 8-11 */ 135 {0, 0, QIC_120} /* minor 12-15 */ 136 }}}, 137 {{T_SEQUENTIAL, T_REMOV, 138 "TANDBERG", " TDC 3800 ", ""}, {0, 0, { 139 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 140 {0, 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", " SLR5 4/8GB ", ""}, {0, 0, { 146 {ST_Q_FORCE_BLKSIZE, 1024, 0}, /* minor 0-3 */ 147 {0, 0, 0}, /* minor 4-7 */ 148 {0, 0, 0}, /* minor 8-11 */ 149 {0, 0, 0} /* minor 12-15 */ 150 }}}, 151 /* 152 * lacking a manual for the 4200, it's not clear what the 153 * specific density codes should be- the device is a 2.5GB 154 * capable QIC drive, those density codes aren't readily 155 * availabel. The 'default' will just have to do. 156 */ 157 {{T_SEQUENTIAL, T_REMOV, 158 "TANDBERG", " TDC 4200 ", ""}, {0, 0, { 159 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 160 {0, 0, QIC_525}, /* minor 4-7 */ 161 {0, 0, QIC_150}, /* minor 8-11 */ 162 {0, 0, QIC_120} /* minor 12-15 */ 163 }}}, 164 /* 165 * At least -005 and -007 need this. I'll assume they all do unless I 166 * hear otherwise. - mycroft, 31MAR1994 167 */ 168 {{T_SEQUENTIAL, T_REMOV, 169 "ARCHIVE ", "VIPER 2525 25462", ""}, {0, 0, { 170 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 171 {ST_Q_SENSE_HELP, 0, QIC_525}, /* minor 4-7 */ 172 {0, 0, QIC_150}, /* minor 8-11 */ 173 {0, 0, QIC_120} /* minor 12-15 */ 174 }}}, 175 /* 176 * One user reports that this works for his tape drive. It probably 177 * needs more work. - mycroft, 09APR1994 178 */ 179 {{T_SEQUENTIAL, T_REMOV, 180 "SANKYO ", "CP525 ", ""}, {0, 0, { 181 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 182 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 183 {0, 0, QIC_150}, /* minor 8-11 */ 184 {0, 0, QIC_120} /* minor 12-15 */ 185 }}}, 186 {{T_SEQUENTIAL, T_REMOV, 187 "ANRITSU ", "DMT780 ", ""}, {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 "ARCHIVE ", "VIPER 150 21247", ""}, {ST_Q_ERASE_NOIMM, 12, { 195 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 196 {0, 0, QIC_150}, /* minor 4-7 */ 197 {0, 0, QIC_120}, /* minor 8-11 */ 198 {0, 0, QIC_24} /* minor 12-15 */ 199 }}}, 200 {{T_SEQUENTIAL, T_REMOV, 201 "ARCHIVE ", "VIPER 150 21531", ""}, {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 "WANGTEK ", "5099ES SCSI", ""}, {0, 0, { 209 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 210 {0, 0, QIC_11}, /* minor 4-7 */ 211 {0, 0, QIC_24}, /* minor 8-11 */ 212 {0, 0, QIC_24} /* minor 12-15 */ 213 }}}, 214 {{T_SEQUENTIAL, T_REMOV, 215 "WANGTEK ", "5150ES SCSI", ""}, {0, 0, { 216 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 217 {0, 0, QIC_24}, /* minor 4-7 */ 218 {0, 0, QIC_120}, /* minor 8-11 */ 219 {0, 0, QIC_150} /* minor 12-15 */ 220 }}}, 221 {{T_SEQUENTIAL, T_REMOV, 222 "WANGTEK ", "5525ES SCSI REV7", ""}, {0, 0, { 223 {0, 0, 0}, /* minor 0-3 */ 224 {ST_Q_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 225 {0, 0, QIC_150}, /* minor 8-11 */ 226 {0, 0, QIC_120} /* minor 12-15 */ 227 }}}, 228 {{T_SEQUENTIAL, T_REMOV, 229 "WangDAT ", "Model 1300 ", ""}, {0, 0, { 230 {0, 0, 0}, /* minor 0-3 */ 231 {ST_Q_FORCE_BLKSIZE, 512, DDS}, /* minor 4-7 */ 232 {ST_Q_FORCE_BLKSIZE, 1024, DDS}, /* minor 8-11 */ 233 {ST_Q_FORCE_BLKSIZE, 0, DDS} /* minor 12-15 */ 234 }}}, 235 {{T_SEQUENTIAL, T_REMOV, 236 "EXABYTE ", "EXB-8200 ", "263H"}, {0, 5, { 237 {0, 0, 0}, /* minor 0-3 */ 238 {0, 0, 0}, /* minor 4-7 */ 239 {0, 0, 0}, /* minor 8-11 */ 240 {0, 0, 0} /* minor 12-15 */ 241 }}}, 242 {{T_SEQUENTIAL, T_REMOV, 243 "STK", "9490", ""}, 244 {ST_Q_FORCE_BLKSIZE, 0, { 245 {0, 0, 0}, /* minor 0-3 */ 246 {0, 0, 0}, /* minor 4-7 */ 247 {0, 0, 0}, /* minor 8-11 */ 248 {0, 0, 0} /* minor 12-15 */ 249 }}}, 250 {{T_SEQUENTIAL, T_REMOV, 251 "STK", "SD-3", ""}, 252 {ST_Q_FORCE_BLKSIZE, 0, { 253 {0, 0, 0}, /* minor 0-3 */ 254 {0, 0, 0}, /* minor 4-7 */ 255 {0, 0, 0}, /* minor 8-11 */ 256 {0, 0, 0} /* minor 12-15 */ 257 }}}, 258 {{T_SEQUENTIAL, T_REMOV, 259 "IBM", "03590", ""}, {ST_Q_IGNORE_LOADS, 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 "HP ", "T4000s ", ""}, {ST_Q_UNIMODAL, 0, { 267 {0, 0, QIC_3095}, /* minor 0-3 */ 268 {0, 0, QIC_3095}, /* minor 4-7 */ 269 {0, 0, QIC_3095}, /* minor 8-11 */ 270 {0, 0, QIC_3095}, /* minor 12-15 */ 271 }}}, 272 #if 0 273 {{T_SEQUENTIAL, T_REMOV, 274 "EXABYTE ", "EXB-8200 ", ""}, {0, 12, { 275 {0, 0, 0}, /* minor 0-3 */ 276 {0, 0, 0}, /* minor 4-7 */ 277 {0, 0, 0}, /* minor 8-11 */ 278 {0, 0, 0} /* minor 12-15 */ 279 }}}, 280 #endif 281 {{T_SEQUENTIAL, T_REMOV, 282 "TEAC ", "MT-2ST/N50 ", ""}, {ST_Q_IGNORE_LOADS, 0, { 283 {0, 0, 0}, /* minor 0-3 */ 284 {0, 0, 0}, /* minor 4-7 */ 285 {0, 0, 0}, /* minor 8-11 */ 286 {0, 0, 0} /* minor 12-15 */ 287 }}}, 288 {{T_SEQUENTIAL, T_REMOV, 289 "OnStream", "ADR50 Drive", ""}, {ST_Q_UNIMODAL, 0, { 290 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 291 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 4-7 */ 292 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 8-11 */ 293 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 12-15 */ 294 }}}, 295 {{T_SEQUENTIAL, T_REMOV, 296 "OnStream DI-30", "", "1.0"}, {ST_Q_NOFILEMARKS, 0, { 297 {0, 0, 0}, /* minor 0-3 */ 298 {0, 0, 0}, /* minor 4-7 */ 299 {0, 0, 0}, /* minor 8-11 */ 300 {0, 0, 0} /* minor 12-15 */ 301 }}}, 302 {{T_SEQUENTIAL, T_REMOV, 303 "NCR H621", "0-STD-03-46F880 ", ""}, {ST_Q_NOPREVENT, 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 }; 310 311 #define NOEJECT 0 312 #define EJECT 1 313 314 static void st_identify_drive(struct st_softc *, 315 struct scsipi_inquiry_pattern *); 316 static void st_loadquirks(struct st_softc *); 317 static int st_mount_tape(dev_t, int); 318 static void st_unmount(struct st_softc *, boolean); 319 static int st_decide_mode(struct st_softc *, boolean); 320 static void ststart(struct scsipi_periph *); 321 static void strestart(void *); 322 static void stdone(struct scsipi_xfer *, int); 323 static int st_read(struct st_softc *, char *, int, int); 324 static int st_space(struct st_softc *, int, u_int, int); 325 static int st_write_filemarks(struct st_softc *, int, int); 326 static int st_check_eod(struct st_softc *, boolean, int *, int); 327 static int st_load(struct st_softc *, u_int, int); 328 static int st_rewind(struct st_softc *, u_int, int); 329 static int st_interpret_sense(struct scsipi_xfer *); 330 static int st_touch_tape(struct st_softc *); 331 static int st_erase(struct st_softc *, int full, int flags); 332 static int st_rdpos(struct st_softc *, int, u_int32_t *); 333 static int st_setpos(struct st_softc *, int, u_int32_t *); 334 335 static const struct scsipi_periphsw st_switch = { 336 st_interpret_sense, 337 ststart, 338 NULL, 339 stdone 340 }; 341 342 #if defined(ST_ENABLE_EARLYWARN) 343 #define ST_INIT_FLAGS ST_EARLYWARN 344 #else 345 #define ST_INIT_FLAGS 0 346 #endif 347 348 /* 349 * The routine called by the low level scsi routine when it discovers 350 * A device suitable for this driver 351 */ 352 void 353 stattach(struct device *parent, struct st_softc *st, void *aux) 354 { 355 struct scsipibus_attach_args *sa = aux; 356 struct scsipi_periph *periph = sa->sa_periph; 357 358 SC_DEBUG(periph, SCSIPI_DB2, ("stattach: ")); 359 360 /* 361 * Store information needed to contact our base driver 362 */ 363 st->sc_periph = periph; 364 periph->periph_dev = &st->sc_dev; 365 periph->periph_switch = &st_switch; 366 367 /* 368 * Set initial flags 369 */ 370 371 st->flags = ST_INIT_FLAGS; 372 373 /* 374 * Set up the buf queue for this device 375 */ 376 bufq_alloc(&st->buf_queue, "fcfs", 0); 377 378 callout_init(&st->sc_callout, 0); 379 380 /* 381 * Check if the drive is a known criminal and take 382 * Any steps needed to bring it into line 383 */ 384 st_identify_drive(st, &sa->sa_inqbuf); 385 /* 386 * Use the subdriver to request information regarding the drive. 387 */ 388 printf("\n"); 389 printf("%s: %s", device_xname(&st->sc_dev), st->quirkdata ? "quirks apply, " : ""); 390 if (scsipi_test_unit_ready(periph, 391 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE) || 392 st->ops(st, ST_OPS_MODESENSE, 393 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE)) 394 printf("drive empty\n"); 395 else { 396 printf("density code %d, ", st->media_density); 397 if (st->media_blksize > 0) 398 printf("%d-byte", st->media_blksize); 399 else 400 printf("variable"); 401 printf(" blocks, write-%s\n", 402 (st->flags & ST_READONLY) ? "protected" : "enabled"); 403 } 404 405 st->stats = iostat_alloc(IOSTAT_TAPE, parent, device_xname(&st->sc_dev)); 406 407 #if NRND > 0 408 rnd_attach_source(&st->rnd_source, device_xname(&st->sc_dev), 409 RND_TYPE_TAPE, 0); 410 #endif 411 } 412 413 int 414 stactivate(struct device *self, enum devact act) 415 { 416 int rv = 0; 417 418 switch (act) { 419 case DVACT_ACTIVATE: 420 rv = EOPNOTSUPP; 421 break; 422 423 case DVACT_DEACTIVATE: 424 /* 425 * Nothing to do; we key off the device's DVF_ACTIVE. 426 */ 427 break; 428 } 429 return (rv); 430 } 431 432 int 433 stdetach(struct device *self, int flags) 434 { 435 struct st_softc *st = device_private(self); 436 int s, bmaj, cmaj, mn; 437 438 /* locate the major number */ 439 bmaj = bdevsw_lookup_major(&st_bdevsw); 440 cmaj = cdevsw_lookup_major(&st_cdevsw); 441 442 /* kill any pending restart */ 443 callout_stop(&st->sc_callout); 444 445 s = splbio(); 446 447 /* Kill off any queued buffers. */ 448 bufq_drain(st->buf_queue); 449 450 bufq_free(st->buf_queue); 451 452 /* Kill off any pending commands. */ 453 scsipi_kill_pending(st->sc_periph); 454 455 splx(s); 456 457 /* Nuke the vnodes for any open instances */ 458 mn = STUNIT(device_unit(self)); 459 vdevgone(bmaj, mn, mn+STNMINOR-1, VBLK); 460 vdevgone(cmaj, mn, mn+STNMINOR-1, VCHR); 461 462 iostat_free(st->stats); 463 464 #if NRND > 0 465 /* Unhook the entropy source. */ 466 rnd_detach_source(&st->rnd_source); 467 #endif 468 469 return (0); 470 } 471 472 /* 473 * Use the inquiry routine in 'scsi_base' to get drive info so we can 474 * Further tailor our behaviour. 475 */ 476 static void 477 st_identify_drive(struct st_softc *st, struct scsipi_inquiry_pattern *inqbuf) 478 { 479 const struct st_quirk_inquiry_pattern *finger; 480 int priority; 481 482 finger = scsipi_inqmatch(inqbuf, 483 st_quirk_patterns, 484 sizeof(st_quirk_patterns) / sizeof(st_quirk_patterns[0]), 485 sizeof(st_quirk_patterns[0]), &priority); 486 if (priority != 0) { 487 st->quirkdata = &finger->quirkdata; 488 st->drive_quirks = finger->quirkdata.quirks; 489 st->quirks = finger->quirkdata.quirks; /* start value */ 490 st->page_0_size = finger->quirkdata.page_0_size; 491 st_loadquirks(st); 492 } 493 } 494 495 /* 496 * initialise the subdevices to the default (QUIRK) state. 497 * this will remove any setting made by the system operator or previous 498 * operations. 499 */ 500 static void 501 st_loadquirks(struct st_softc *st) 502 { 503 int i; 504 const struct modes *mode; 505 struct modes *mode2; 506 507 mode = st->quirkdata->modes; 508 mode2 = st->modes; 509 for (i = 0; i < 4; i++) { 510 memset(mode2, 0, sizeof(struct modes)); 511 st->modeflags[i] &= ~(BLKSIZE_SET_BY_QUIRK | 512 DENSITY_SET_BY_QUIRK | BLKSIZE_SET_BY_USER | 513 DENSITY_SET_BY_USER); 514 if ((mode->quirks | st->drive_quirks) & ST_Q_FORCE_BLKSIZE) { 515 mode2->blksize = mode->blksize; 516 st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; 517 } 518 if (mode->density) { 519 mode2->density = mode->density; 520 st->modeflags[i] |= DENSITY_SET_BY_QUIRK; 521 } 522 mode2->quirks |= mode->quirks; 523 mode++; 524 mode2++; 525 } 526 } 527 528 /* 529 * open the device. 530 */ 531 static int 532 stopen(dev_t dev, int flags, int mode, struct lwp *l) 533 { 534 u_int stmode, dsty; 535 int error, sflags, unit, tries, ntries; 536 struct st_softc *st; 537 struct scsipi_periph *periph; 538 struct scsipi_adapter *adapt; 539 540 unit = STUNIT(dev); 541 if (unit >= st_cd.cd_ndevs) 542 return (ENXIO); 543 st = st_cd.cd_devs[unit]; 544 if (st == NULL) 545 return (ENXIO); 546 547 stmode = STMODE(dev); 548 dsty = STDSTY(dev); 549 550 periph = st->sc_periph; 551 adapt = periph->periph_channel->chan_adapter; 552 553 SC_DEBUG(periph, SCSIPI_DB1, ("open: dev=0x%x (unit %d (of %d))\n", dev, 554 unit, st_cd.cd_ndevs)); 555 556 557 /* 558 * Only allow one at a time 559 */ 560 if (periph->periph_flags & PERIPH_OPEN) { 561 aprint_error_dev(&st->sc_dev, "already open\n"); 562 return (EBUSY); 563 } 564 565 if ((error = scsipi_adapter_addref(adapt)) != 0) 566 return (error); 567 568 /* 569 * clear any latched errors. 570 */ 571 st->mt_resid = 0; 572 st->mt_erreg = 0; 573 st->asc = 0; 574 st->ascq = 0; 575 576 /* 577 * Catch any unit attention errors. Be silent about this 578 * unless we're already mounted. We ignore media change 579 * if we're in control mode or not mounted yet. 580 */ 581 if ((st->flags & ST_MOUNTED) == 0 || stmode == CTRL_MODE) { 582 #ifdef SCSIDEBUG 583 sflags = XS_CTL_IGNORE_MEDIA_CHANGE; 584 #else 585 sflags = XS_CTL_SILENT|XS_CTL_IGNORE_MEDIA_CHANGE; 586 #endif 587 } else 588 sflags = 0; 589 590 /* 591 * If we're already mounted or we aren't configured for 592 * a mount delay, only try a test unit ready once. Otherwise, 593 * try up to ST_MOUNT_DELAY times with a rest interval of 594 * one second between each try. 595 */ 596 597 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0) { 598 ntries = 1; 599 } else { 600 ntries = ST_MOUNT_DELAY; 601 } 602 603 for (error = tries = 0; tries < ntries; tries++) { 604 int slpintr, oflags; 605 606 /* 607 * If we had no error, or we're opening the control mode 608 * device, we jump out right away. 609 */ 610 611 error = scsipi_test_unit_ready(periph, sflags); 612 if (error == 0 || stmode == CTRL_MODE) { 613 break; 614 } 615 616 /* 617 * We had an error. 618 * 619 * If we're already mounted or we aren't configured for 620 * a mount delay, or the error isn't a NOT READY error, 621 * skip to the error exit now. 622 */ 623 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0 || 624 (st->mt_key != SKEY_NOT_READY)) { 625 goto bad; 626 } 627 628 /* 629 * clear any latched errors. 630 */ 631 st->mt_resid = 0; 632 st->mt_erreg = 0; 633 st->asc = 0; 634 st->ascq = 0; 635 636 /* 637 * Fake that we have the device open so 638 * we block other apps from getting in. 639 */ 640 641 oflags = periph->periph_flags; 642 periph->periph_flags |= PERIPH_OPEN; 643 644 slpintr = tsleep(&lbolt, PUSER|PCATCH, "stload", 0); 645 646 periph->periph_flags = oflags; /* restore flags */ 647 if (slpintr) { 648 goto bad; 649 } 650 } 651 652 653 /* 654 * If the mode is 3 (e.g. minor = 3,7,11,15) then the device has 655 * been opened to set defaults and perform other, usually non-I/O 656 * related, operations. In this case, do a quick check to see 657 * whether the unit actually had a tape loaded (this will be known 658 * as to whether or not we got a NOT READY for the above 659 * unit attention). If a tape is there, go do a mount sequence. 660 */ 661 if (stmode == CTRL_MODE && st->mt_key == SKEY_NOT_READY) { 662 periph->periph_flags |= PERIPH_OPEN; 663 return (0); 664 } 665 666 /* 667 * If we get this far and had an error set, that means we failed 668 * to pass the 'test unit ready' test for the non-controlmode device, 669 * so we bounce the open. 670 */ 671 672 if (error) 673 return (error); 674 675 /* 676 * Else, we're now committed to saying we're open. 677 */ 678 679 periph->periph_flags |= PERIPH_OPEN; /* unit attn are now errors */ 680 681 /* 682 * If it's a different mode, or if the media has been 683 * invalidated, unmount the tape from the previous 684 * session but continue with open processing 685 */ 686 if (st->last_dsty != dsty || 687 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 688 st_unmount(st, NOEJECT); 689 690 /* 691 * If we are not mounted, then we should start a new 692 * mount session. 693 */ 694 if (!(st->flags & ST_MOUNTED)) { 695 if ((error = st_mount_tape(dev, flags)) != 0) 696 goto bad; 697 st->last_dsty = dsty; 698 } 699 if (!(st->quirks & ST_Q_NOPREVENT)) { 700 scsipi_prevent(periph, SPAMR_PREVENT_DT, 701 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 702 } 703 704 SC_DEBUG(periph, SCSIPI_DB2, ("open complete\n")); 705 return (0); 706 707 bad: 708 st_unmount(st, NOEJECT); 709 scsipi_adapter_delref(adapt); 710 periph->periph_flags &= ~PERIPH_OPEN; 711 return (error); 712 } 713 714 /* 715 * close the device.. only called if we are the LAST 716 * occurence of an open device 717 */ 718 static int 719 stclose(dev_t dev, int flags, int mode, struct lwp *l) 720 { 721 int stxx, error = 0; 722 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 723 struct scsipi_periph *periph = st->sc_periph; 724 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 725 726 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("closing\n")); 727 728 /* 729 * Make sure that a tape opened in write-only mode will have 730 * file marks written on it when closed, even if not written to. 731 * 732 * This is for SUN compatibility. Actually, the Sun way of 733 * things is to: 734 * 735 * only write filemarks if there are fmks to be written and 736 * - open for write (possibly read/write) 737 * - the last operation was a write 738 * or: 739 * - opened for wronly 740 * - no data was written (including filemarks) 741 */ 742 743 stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); 744 if (((flags & FWRITE) && stxx == ST_WRITTEN) || 745 ((flags & O_ACCMODE) == FWRITE && stxx == 0)) { 746 int nm; 747 error = st_check_eod(st, FALSE, &nm, 0); 748 } 749 750 /* 751 * Allow robots to eject tape if needed. 752 */ 753 scsipi_prevent(periph, SPAMR_ALLOW, 754 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 755 756 switch (STMODE(dev)) { 757 case NORMAL_MODE: 758 st_unmount(st, NOEJECT); 759 break; 760 case NOREW_MODE: 761 case CTRL_MODE: 762 /* 763 * Leave mounted unless media seems to have been removed. 764 * 765 * Otherwise, if we're to terminate a tape with more than one 766 * filemark [ and because we're not rewinding here ], backspace 767 * one filemark so that later appends will see an unbroken 768 * sequence of: 769 * 770 * file - FMK - file - FMK ... file - FMK FMK (EOM) 771 */ 772 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 773 st_unmount(st, NOEJECT); 774 } else if (error == 0) { 775 /* 776 * ST_WRITTEN was preserved from above. 777 * 778 * All we need to know here is: 779 * 780 * Were we writing this tape and was the last 781 * operation a write? 782 * 783 * Are there supposed to be 2FM at EOD? 784 * 785 * If both statements are true, then we backspace 786 * one filemark. 787 */ 788 stxx |= (st->flags & ST_2FM_AT_EOD); 789 if ((flags & FWRITE) != 0 && 790 (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { 791 error = st_space(st, -1, SP_FILEMARKS, 0); 792 } 793 } 794 break; 795 case EJECT_MODE: 796 st_unmount(st, EJECT); 797 break; 798 } 799 800 scsipi_wait_drain(periph); 801 802 scsipi_adapter_delref(adapt); 803 periph->periph_flags &= ~PERIPH_OPEN; 804 805 return (error); 806 } 807 808 /* 809 * Start a new mount session. 810 * Copy in all the default parameters from the selected device mode. 811 * and try guess any that seem to be defaulted. 812 */ 813 static int 814 st_mount_tape(dev_t dev, int flags) 815 { 816 int unit; 817 u_int dsty; 818 struct st_softc *st; 819 struct scsipi_periph *periph; 820 int error = 0; 821 822 unit = STUNIT(dev); 823 dsty = STDSTY(dev); 824 st = st_cd.cd_devs[unit]; 825 periph = st->sc_periph; 826 827 if (st->flags & ST_MOUNTED) 828 return (0); 829 830 SC_DEBUG(periph, SCSIPI_DB1, ("mounting\n ")); 831 st->flags |= ST_NEW_MOUNT; 832 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 833 /* 834 * If the media is new, then make sure we give it a chance to 835 * to do a 'load' instruction. (We assume it is new.) 836 */ 837 if ((error = st_load(st, LD_LOAD, XS_CTL_SILENT)) != 0) 838 return (error); 839 /* 840 * Throw another dummy instruction to catch 841 * 'Unit attention' errors. Many drives give 842 * these after doing a Load instruction (with 843 * the MEDIUM MAY HAVE CHANGED asc/ascq). 844 */ 845 scsipi_test_unit_ready(periph, XS_CTL_SILENT); /* XXX */ 846 847 /* 848 * Some devices can't tell you much until they have been 849 * asked to look at the media. This quirk does this. 850 */ 851 if (st->quirks & ST_Q_SENSE_HELP) 852 if ((error = st_touch_tape(st)) != 0) 853 return (error); 854 /* 855 * Load the physical device parameters 856 * loads: blkmin, blkmax 857 */ 858 if ((error = st->ops(st, ST_OPS_RBL, 0)) != 0) 859 return (error); 860 /* 861 * Load the media dependent parameters 862 * includes: media_blksize,media_density,numblks 863 * As we have a tape in, it should be reflected here. 864 * If not you may need the "quirk" above. 865 */ 866 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 867 return (error); 868 /* 869 * If we have gained a permanent density from somewhere, 870 * then use it in preference to the one supplied by 871 * default by the driver. 872 */ 873 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 874 st->density = st->modes[dsty].density; 875 else 876 st->density = st->media_density; 877 /* 878 * If we have gained a permanent blocksize 879 * then use it in preference to the one supplied by 880 * default by the driver. 881 */ 882 st->flags &= ~ST_FIXEDBLOCKS; 883 if (st->modeflags[dsty] & 884 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 885 st->blksize = st->modes[dsty].blksize; 886 if (st->blksize) 887 st->flags |= ST_FIXEDBLOCKS; 888 } else { 889 if ((error = st_decide_mode(st, FALSE)) != 0) 890 return (error); 891 } 892 if ((error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 893 /* ATAPI will return ENODEV for this, and this may be OK */ 894 if (error != ENODEV) { 895 aprint_error_dev(&st->sc_dev, "cannot set selected mode\n"); 896 return (error); 897 } 898 } 899 st->flags &= ~ST_NEW_MOUNT; 900 st->flags |= ST_MOUNTED; 901 periph->periph_flags |= PERIPH_MEDIA_LOADED; /* move earlier? */ 902 st->blkno = st->fileno = (daddr_t) 0; 903 return (0); 904 } 905 906 /* 907 * End the present mount session. 908 * Rewind, and optionally eject the tape. 909 * Reset various flags to indicate that all new 910 * operations require another mount operation 911 */ 912 static void 913 st_unmount(struct st_softc *st, boolean eject) 914 { 915 struct scsipi_periph *periph = st->sc_periph; 916 int nmarks; 917 918 if ((st->flags & ST_MOUNTED) == 0) 919 return; 920 SC_DEBUG(periph, SCSIPI_DB1, ("unmounting\n")); 921 st_check_eod(st, FALSE, &nmarks, XS_CTL_IGNORE_NOT_READY); 922 st_rewind(st, 0, XS_CTL_IGNORE_NOT_READY); 923 924 /* 925 * Section 9.3.3 of the SCSI specs states that a device shall return 926 * the density value specified in the last succesfull MODE SELECT 927 * after an unload operation, in case it is not able to 928 * automatically determine the density of the new medium. 929 * 930 * So we instruct the device to use the default density, which will 931 * prevent the use of stale density values (in particular, 932 * in st_touch_tape(). 933 */ 934 st->density = 0; 935 if (st->ops(st, ST_OPS_MODESELECT, 0) != 0) { 936 aprint_error_dev(&st->sc_dev, "WARNING: cannot revert to default density\n"); 937 } 938 939 if (eject) { 940 if (!(st->quirks & ST_Q_NOPREVENT)) { 941 scsipi_prevent(periph, SPAMR_ALLOW, 942 XS_CTL_IGNORE_ILLEGAL_REQUEST | 943 XS_CTL_IGNORE_NOT_READY); 944 } 945 st_load(st, LD_UNLOAD, XS_CTL_IGNORE_NOT_READY); 946 st->blkno = st->fileno = (daddr_t) -1; 947 } else { 948 st->blkno = st->fileno = (daddr_t) 0; 949 } 950 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 951 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 952 } 953 954 /* 955 * Given all we know about the device, media, mode, 'quirks' and 956 * initial operation, make a decision as to how we should be set 957 * to run (regarding blocking and EOD marks) 958 */ 959 int 960 st_decide_mode(struct st_softc *st, boolean first_read) 961 { 962 963 SC_DEBUG(st->sc_periph, SCSIPI_DB2, ("starting block mode decision\n")); 964 965 /* 966 * If the drive can only handle fixed-length blocks and only at 967 * one size, perhaps we should just do that. 968 */ 969 if (st->blkmin && (st->blkmin == st->blkmax)) { 970 st->flags |= ST_FIXEDBLOCKS; 971 st->blksize = st->blkmin; 972 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 973 ("blkmin == blkmax of %d\n", st->blkmin)); 974 goto done; 975 } 976 /* 977 * If the tape density mandates (or even suggests) use of fixed 978 * or variable-length blocks, comply. 979 */ 980 switch (st->density) { 981 case HALFINCH_800: 982 case HALFINCH_1600: 983 case HALFINCH_6250: 984 case DDS: 985 st->flags &= ~ST_FIXEDBLOCKS; 986 st->blksize = 0; 987 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 988 ("density specified variable\n")); 989 goto done; 990 case QIC_11: 991 case QIC_24: 992 case QIC_120: 993 case QIC_150: 994 case QIC_525: 995 case QIC_1320: 996 case QIC_3095: 997 case QIC_3220: 998 st->flags |= ST_FIXEDBLOCKS; 999 if (st->media_blksize > 0) 1000 st->blksize = st->media_blksize; 1001 else 1002 st->blksize = DEF_FIXED_BSIZE; 1003 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1004 ("density specified fixed\n")); 1005 goto done; 1006 } 1007 /* 1008 * If we're about to read the tape, perhaps we should choose 1009 * fixed or variable-length blocks and block size according to 1010 * what the drive found on the tape. 1011 */ 1012 if (first_read && 1013 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 1014 (st->media_blksize == DEF_FIXED_BSIZE) || 1015 (st->media_blksize == 1024))) { 1016 if (st->media_blksize > 0) 1017 st->flags |= ST_FIXEDBLOCKS; 1018 else 1019 st->flags &= ~ST_FIXEDBLOCKS; 1020 st->blksize = st->media_blksize; 1021 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1022 ("Used media_blksize of %d\n", st->media_blksize)); 1023 goto done; 1024 } 1025 /* 1026 * We're getting no hints from any direction. Choose variable- 1027 * length blocks arbitrarily. 1028 */ 1029 st->flags &= ~ST_FIXEDBLOCKS; 1030 st->blksize = 0; 1031 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1032 ("Give up and default to variable mode\n")); 1033 1034 done: 1035 /* 1036 * Decide whether or not to write two file marks to signify end- 1037 * of-data. Make the decision as a function of density. If 1038 * the decision is not to use a second file mark, the SCSI BLANK 1039 * CHECK condition code will be recognized as end-of-data when 1040 * first read. 1041 * (I think this should be a by-product of fixed/variable..julian) 1042 */ 1043 switch (st->density) { 1044 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 1045 case QIC_11: 1046 case QIC_24: 1047 case QIC_120: 1048 case QIC_150: 1049 case QIC_525: 1050 case QIC_1320: 1051 case QIC_3095: 1052 case QIC_3220: 1053 st->flags &= ~ST_2FM_AT_EOD; 1054 break; 1055 default: 1056 st->flags |= ST_2FM_AT_EOD; 1057 } 1058 return (0); 1059 } 1060 1061 /* 1062 * Actually translate the requested transfer into 1063 * one the physical driver can understand 1064 * The transfer is described by a buf and will include 1065 * only one physical transfer. 1066 */ 1067 static void 1068 ststrategy(struct buf *bp) 1069 { 1070 struct st_softc *st = st_cd.cd_devs[STUNIT(bp->b_dev)]; 1071 int s; 1072 1073 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1074 ("ststrategy %d bytes @ blk %" PRId64 "\n", bp->b_bcount, bp->b_blkno)); 1075 /* 1076 * If it's a null transfer, return immediatly 1077 */ 1078 if (bp->b_bcount == 0) 1079 goto done; 1080 1081 /* If offset is negative, error */ 1082 if (bp->b_blkno < 0) { 1083 bp->b_error = EINVAL; 1084 goto done; 1085 } 1086 1087 /* 1088 * Odd sized request on fixed drives are verboten 1089 */ 1090 if (st->flags & ST_FIXEDBLOCKS) { 1091 if (bp->b_bcount % st->blksize) { 1092 aprint_error_dev(&st->sc_dev, "bad request, must be multiple of %d\n", 1093 st->blksize); 1094 bp->b_error = EIO; 1095 goto done; 1096 } 1097 } 1098 /* 1099 * as are out-of-range requests on variable drives. 1100 */ 1101 else if (bp->b_bcount < st->blkmin || 1102 (st->blkmax && bp->b_bcount > st->blkmax)) { 1103 aprint_error_dev(&st->sc_dev, "bad request, must be between %d and %d\n", 1104 st->blkmin, st->blkmax); 1105 bp->b_error = EIO; 1106 goto done; 1107 } 1108 s = splbio(); 1109 1110 /* 1111 * Place it in the queue of activities for this tape 1112 * at the end (a bit silly because we only have on user.. 1113 * (but it could fork())) 1114 */ 1115 BUFQ_PUT(st->buf_queue, bp); 1116 1117 /* 1118 * Tell the device to get going on the transfer if it's 1119 * not doing anything, otherwise just wait for completion 1120 * (All a bit silly if we're only allowing 1 open but..) 1121 */ 1122 ststart(st->sc_periph); 1123 1124 splx(s); 1125 return; 1126 done: 1127 /* 1128 * Correctly set the buf to indicate a completed xfer 1129 */ 1130 bp->b_resid = bp->b_bcount; 1131 biodone(bp); 1132 return; 1133 } 1134 1135 /* 1136 * ststart looks to see if there is a buf waiting for the device 1137 * and that the device is not already busy. If both are true, 1138 * It dequeues the buf and creates a scsi command to perform the 1139 * transfer required. The transfer request will call scsipi_done 1140 * on completion, which will in turn call this routine again 1141 * so that the next queued transfer is performed. 1142 * The bufs are queued by the strategy routine (ststrategy) 1143 * 1144 * This routine is also called after other non-queued requests 1145 * have been made of the scsi driver, to ensure that the queue 1146 * continues to be drained. 1147 * ststart() is called at splbio 1148 */ 1149 static void 1150 ststart(struct scsipi_periph *periph) 1151 { 1152 struct st_softc *st = (void *)periph->periph_dev; 1153 struct buf *bp; 1154 struct scsi_rw_tape cmd; 1155 struct scsipi_xfer *xs; 1156 int flags, error; 1157 1158 SC_DEBUG(periph, SCSIPI_DB2, ("ststart ")); 1159 /* 1160 * See if there is a buf to do and we are not already 1161 * doing one 1162 */ 1163 while (periph->periph_active < periph->periph_openings) { 1164 /* if a special awaits, let it proceed first */ 1165 if (periph->periph_flags & PERIPH_WAITING) { 1166 periph->periph_flags &= ~PERIPH_WAITING; 1167 wakeup((void *)periph); 1168 return; 1169 } 1170 1171 /* 1172 * If the device has been unmounted by the user 1173 * then throw away all requests until done. 1174 */ 1175 if (__predict_false((st->flags & ST_MOUNTED) == 0 || 1176 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0)) { 1177 if ((bp = BUFQ_GET(st->buf_queue)) != NULL) { 1178 /* make sure that one implies the other.. */ 1179 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 1180 bp->b_error = EIO; 1181 bp->b_resid = bp->b_bcount; 1182 biodone(bp); 1183 continue; 1184 } else { 1185 return; 1186 } 1187 } 1188 1189 if ((bp = BUFQ_PEEK(st->buf_queue)) == NULL) 1190 return; 1191 1192 iostat_busy(st->stats); 1193 1194 /* 1195 * only FIXEDBLOCK devices have pending I/O or space operations. 1196 */ 1197 if (st->flags & ST_FIXEDBLOCKS) { 1198 /* 1199 * If we are at a filemark but have not reported it yet 1200 * then we should report it now 1201 */ 1202 if (st->flags & ST_AT_FILEMARK) { 1203 if ((bp->b_flags & B_READ) == B_WRITE) { 1204 /* 1205 * Handling of ST_AT_FILEMARK in 1206 * st_space will fill in the right file 1207 * mark count. 1208 * Back up over filemark 1209 */ 1210 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1211 BUFQ_GET(st->buf_queue); 1212 bp->b_error = EIO; 1213 bp->b_resid = bp->b_bcount; 1214 biodone(bp); 1215 continue; 1216 } 1217 } else { 1218 BUFQ_GET(st->buf_queue); 1219 bp->b_resid = bp->b_bcount; 1220 bp->b_error = 0; 1221 st->flags &= ~ST_AT_FILEMARK; 1222 biodone(bp); 1223 continue; /* seek more work */ 1224 } 1225 } 1226 } 1227 /* 1228 * If we are at EOM but have not reported it 1229 * yet then we should report it now. 1230 */ 1231 if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { 1232 BUFQ_GET(st->buf_queue); 1233 bp->b_resid = bp->b_bcount; 1234 if (st->flags & ST_EIO_PENDING) 1235 bp->b_error = EIO; 1236 st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); 1237 biodone(bp); 1238 continue; /* seek more work */ 1239 } 1240 1241 /* 1242 * Fill out the scsi command 1243 */ 1244 memset(&cmd, 0, sizeof(cmd)); 1245 flags = XS_CTL_NOSLEEP | XS_CTL_ASYNC; 1246 if ((bp->b_flags & B_READ) == B_WRITE) { 1247 cmd.opcode = WRITE; 1248 st->flags &= ~ST_FM_WRITTEN; 1249 flags |= XS_CTL_DATA_OUT; 1250 } else { 1251 cmd.opcode = READ; 1252 flags |= XS_CTL_DATA_IN; 1253 } 1254 1255 /* 1256 * Handle "fixed-block-mode" tape drives by using the 1257 * block count instead of the length. 1258 */ 1259 if (st->flags & ST_FIXEDBLOCKS) { 1260 cmd.byte2 |= SRW_FIXED; 1261 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1262 } else 1263 _lto3b(bp->b_bcount, cmd.len); 1264 1265 /* 1266 * Clear 'position updated' indicator 1267 */ 1268 st->flags &= ~ST_POSUPDATED; 1269 1270 /* 1271 * go ask the adapter to do all this for us 1272 */ 1273 xs = scsipi_make_xs(periph, 1274 (struct scsipi_generic *)&cmd, sizeof(cmd), 1275 (u_char *)bp->b_data, bp->b_bcount, 1276 0, ST_IO_TIME, bp, flags); 1277 if (__predict_false(xs == NULL)) { 1278 /* 1279 * out of memory. Keep this buffer in the queue, and 1280 * retry later. 1281 */ 1282 callout_reset(&st->sc_callout, hz / 2, strestart, 1283 periph); 1284 return; 1285 } 1286 /* 1287 * need to dequeue the buffer before queuing the command, 1288 * because cdstart may be called recursively from the 1289 * HBA driver 1290 */ 1291 #ifdef DIAGNOSTIC 1292 if (BUFQ_GET(st->buf_queue) != bp) 1293 panic("ststart(): dequeued wrong buf"); 1294 #else 1295 BUFQ_GET(st->buf_queue); 1296 #endif 1297 error = scsipi_execute_xs(xs); 1298 /* with a scsipi_xfer preallocated, scsipi_command can't fail */ 1299 KASSERT(error == 0); 1300 } /* go back and see if we can cram more work in.. */ 1301 } 1302 1303 static void 1304 strestart(void *v) 1305 { 1306 int s = splbio(); 1307 ststart((struct scsipi_periph *)v); 1308 splx(s); 1309 } 1310 1311 1312 static void 1313 stdone(struct scsipi_xfer *xs, int error) 1314 { 1315 struct st_softc *st = (void *)xs->xs_periph->periph_dev; 1316 struct buf *bp = xs->bp; 1317 1318 if (bp) { 1319 bp->b_error = error; 1320 bp->b_resid = xs->resid; 1321 /* 1322 * buggy device ? A SDLT320 can report an info 1323 * field of 0x3de8000 on a Media Error/Write Error 1324 * for this CBD: 0x0a 00 00 80 00 00 1325 */ 1326 if (bp->b_resid > bp->b_bcount || bp->b_resid < 0) 1327 bp->b_resid = bp->b_bcount; 1328 1329 if ((bp->b_flags & B_READ) == B_WRITE) 1330 st->flags |= ST_WRITTEN; 1331 else 1332 st->flags &= ~ST_WRITTEN; 1333 1334 iostat_unbusy(st->stats, bp->b_bcount, 1335 ((bp->b_flags & B_READ) == B_READ)); 1336 1337 #if NRND > 0 1338 rnd_add_uint32(&st->rnd_source, bp->b_blkno); 1339 #endif 1340 1341 if ((st->flags & ST_POSUPDATED) == 0) { 1342 if (error) { 1343 st->fileno = st->blkno = -1; 1344 } else if (st->blkno != -1) { 1345 if (st->flags & ST_FIXEDBLOCKS) 1346 st->blkno += 1347 (bp->b_bcount / st->blksize); 1348 else 1349 st->blkno++; 1350 } 1351 } 1352 1353 biodone(bp); 1354 } 1355 } 1356 1357 static int 1358 stread(dev_t dev, struct uio *uio, int iomode) 1359 { 1360 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1361 1362 return (physio(ststrategy, NULL, dev, B_READ, 1363 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1364 } 1365 1366 static int 1367 stwrite(dev_t dev, struct uio *uio, int iomode) 1368 { 1369 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1370 1371 return (physio(ststrategy, NULL, dev, B_WRITE, 1372 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1373 } 1374 1375 /* 1376 * Perform special action on behalf of the user; 1377 * knows about the internals of this device 1378 */ 1379 static int 1380 stioctl(dev_t dev, u_long cmd, void *arg, int flag, struct lwp *l) 1381 { 1382 int error = 0; 1383 int unit; 1384 int number, nmarks, dsty; 1385 int flags; 1386 struct st_softc *st; 1387 int hold_blksize; 1388 u_int8_t hold_density; 1389 struct mtop *mt = (struct mtop *) arg; 1390 1391 /* 1392 * Find the device that the user is talking about 1393 */ 1394 flags = 0; /* give error messages, act on errors etc. */ 1395 unit = STUNIT(dev); 1396 dsty = STDSTY(dev); 1397 st = st_cd.cd_devs[unit]; 1398 hold_blksize = st->blksize; 1399 hold_density = st->density; 1400 1401 switch ((u_int) cmd) { 1402 1403 case MTIOCGET: { 1404 struct mtget *g = (struct mtget *) arg; 1405 /* 1406 * (to get the current state of READONLY) 1407 */ 1408 error = st->ops(st, ST_OPS_MODESENSE, XS_CTL_SILENT); 1409 if (error) { 1410 /* 1411 * Ignore the error if in control mode; 1412 * this is mandated by st(4). 1413 */ 1414 if (STMODE(dev) != CTRL_MODE) 1415 break; 1416 error = 0; 1417 } 1418 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("[ioctl: get status]\n")); 1419 memset(g, 0, sizeof(struct mtget)); 1420 g->mt_type = 0x7; /* Ultrix compat *//*? */ 1421 g->mt_blksiz = st->blksize; 1422 g->mt_density = st->density; 1423 g->mt_mblksiz[0] = st->modes[0].blksize; 1424 g->mt_mblksiz[1] = st->modes[1].blksize; 1425 g->mt_mblksiz[2] = st->modes[2].blksize; 1426 g->mt_mblksiz[3] = st->modes[3].blksize; 1427 g->mt_mdensity[0] = st->modes[0].density; 1428 g->mt_mdensity[1] = st->modes[1].density; 1429 g->mt_mdensity[2] = st->modes[2].density; 1430 g->mt_mdensity[3] = st->modes[3].density; 1431 g->mt_fileno = st->fileno; 1432 g->mt_blkno = st->blkno; 1433 if (st->flags & ST_READONLY) 1434 g->mt_dsreg |= MT_DS_RDONLY; 1435 if (st->flags & ST_MOUNTED) 1436 g->mt_dsreg |= MT_DS_MOUNTED; 1437 g->mt_resid = st->mt_resid; 1438 g->mt_erreg = st->mt_erreg; 1439 /* 1440 * clear latched errors. 1441 */ 1442 st->mt_resid = 0; 1443 st->mt_erreg = 0; 1444 st->asc = 0; 1445 st->ascq = 0; 1446 break; 1447 } 1448 case MTIOCTOP: { 1449 1450 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1451 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1452 mt->mt_count)); 1453 1454 /* compat: in U*x it is a short */ 1455 number = mt->mt_count; 1456 switch ((short) (mt->mt_op)) { 1457 case MTWEOF: /* write an end-of-file record */ 1458 error = st_write_filemarks(st, number, flags); 1459 break; 1460 case MTBSF: /* backward space file */ 1461 number = -number; 1462 case MTFSF: /* forward space file */ 1463 error = st_check_eod(st, FALSE, &nmarks, flags); 1464 if (!error) 1465 error = st_space(st, number - nmarks, 1466 SP_FILEMARKS, flags); 1467 break; 1468 case MTBSR: /* backward space record */ 1469 number = -number; 1470 case MTFSR: /* forward space record */ 1471 error = st_check_eod(st, true, &nmarks, flags); 1472 if (!error) 1473 error = st_space(st, number, SP_BLKS, flags); 1474 break; 1475 case MTREW: /* rewind */ 1476 error = st_rewind(st, 0, flags); 1477 break; 1478 case MTOFFL: /* rewind and put the drive offline */ 1479 st_unmount(st, EJECT); 1480 break; 1481 case MTNOP: /* no operation, sets status only */ 1482 break; 1483 case MTRETEN: /* retension the tape */ 1484 error = st_load(st, LD_RETENSION, flags); 1485 if (!error) 1486 error = st_load(st, LD_LOAD, flags); 1487 break; 1488 case MTEOM: /* forward space to end of media */ 1489 error = st_check_eod(st, FALSE, &nmarks, flags); 1490 if (!error) 1491 error = st_space(st, 1, SP_EOM, flags); 1492 break; 1493 case MTCACHE: /* enable controller cache */ 1494 st->flags &= ~ST_DONTBUFFER; 1495 goto try_new_value; 1496 case MTNOCACHE: /* disable controller cache */ 1497 st->flags |= ST_DONTBUFFER; 1498 goto try_new_value; 1499 case MTERASE: /* erase volume */ 1500 error = st_erase(st, number, flags); 1501 break; 1502 case MTSETBSIZ: /* Set block size for device */ 1503 #ifdef NOTYET 1504 if (!(st->flags & ST_NEW_MOUNT)) { 1505 uprintf("re-mount tape before changing blocksize"); 1506 error = EINVAL; 1507 break; 1508 } 1509 #endif 1510 if (number == 0) 1511 st->flags &= ~ST_FIXEDBLOCKS; 1512 else { 1513 if ((st->blkmin || st->blkmax) && 1514 (number < st->blkmin || 1515 number > st->blkmax)) { 1516 error = EINVAL; 1517 break; 1518 } 1519 st->flags |= ST_FIXEDBLOCKS; 1520 } 1521 st->blksize = number; 1522 st->flags |= ST_BLOCK_SET; /*XXX */ 1523 goto try_new_value; 1524 1525 case MTSETDNSTY: /* Set density for device and mode */ 1526 /* 1527 * Any number >= 0 and <= 0xff is legal. Numbers 1528 * above 0x80 are 'vendor unique'. 1529 */ 1530 if (number < 0 || number > 255) { 1531 error = EINVAL; 1532 break; 1533 } else 1534 st->density = number; 1535 goto try_new_value; 1536 1537 case MTCMPRESS: 1538 error = st->ops(st, (number == 0) ? 1539 ST_OPS_CMPRSS_OFF : ST_OPS_CMPRSS_ON, 1540 XS_CTL_SILENT); 1541 break; 1542 1543 case MTEWARN: 1544 if (number) 1545 st->flags |= ST_EARLYWARN; 1546 else 1547 st->flags &= ~ST_EARLYWARN; 1548 break; 1549 1550 default: 1551 error = EINVAL; 1552 } 1553 break; 1554 } 1555 case MTIOCIEOT: 1556 case MTIOCEEOT: 1557 break; 1558 1559 case MTIOCRDSPOS: 1560 error = st_rdpos(st, 0, (u_int32_t *) arg); 1561 break; 1562 1563 case MTIOCRDHPOS: 1564 error = st_rdpos(st, 1, (u_int32_t *) arg); 1565 break; 1566 1567 case MTIOCSLOCATE: 1568 error = st_setpos(st, 0, (u_int32_t *) arg); 1569 break; 1570 1571 case MTIOCHLOCATE: 1572 error = st_setpos(st, 1, (u_int32_t *) arg); 1573 break; 1574 1575 1576 default: 1577 error = scsipi_do_ioctl(st->sc_periph, dev, cmd, arg, 1578 flag, l); 1579 break; 1580 } 1581 return (error); 1582 /*-----------------------------*/ 1583 try_new_value: 1584 /* 1585 * Check that the mode being asked for is aggreeable to the 1586 * drive. If not, put it back the way it was. 1587 * 1588 * If in control mode, we can make (persistent) mode changes 1589 * even if no medium is loaded (see st(4)). 1590 */ 1591 if ((STMODE(dev) != CTRL_MODE || (st->flags & ST_MOUNTED) != 0) && 1592 (error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 1593 /* put it back as it was */ 1594 aprint_error_dev(&st->sc_dev, "cannot set selected mode\n"); 1595 st->density = hold_density; 1596 st->blksize = hold_blksize; 1597 if (st->blksize) 1598 st->flags |= ST_FIXEDBLOCKS; 1599 else 1600 st->flags &= ~ST_FIXEDBLOCKS; 1601 return (error); 1602 } 1603 /* 1604 * As the drive liked it, if we are setting a new default, 1605 * set it into the structures as such. 1606 * 1607 * The means for deciding this are not finalised yet- but 1608 * if the device was opened in Control Mode, the values 1609 * are persistent now across mounts. 1610 */ 1611 if (STMODE(dev) == CTRL_MODE) { 1612 switch ((short) (mt->mt_op)) { 1613 case MTSETBSIZ: 1614 st->modes[dsty].blksize = st->blksize; 1615 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1616 break; 1617 case MTSETDNSTY: 1618 st->modes[dsty].density = st->density; 1619 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1620 break; 1621 } 1622 } 1623 return (0); 1624 } 1625 1626 /* 1627 * Do a synchronous read. 1628 */ 1629 static int 1630 st_read(struct st_softc *st, char *bf, int size, int flags) 1631 { 1632 struct scsi_rw_tape cmd; 1633 1634 /* 1635 * If it's a null transfer, return immediatly 1636 */ 1637 if (size == 0) 1638 return (0); 1639 memset(&cmd, 0, sizeof(cmd)); 1640 cmd.opcode = READ; 1641 if (st->flags & ST_FIXEDBLOCKS) { 1642 cmd.byte2 |= SRW_FIXED; 1643 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1644 cmd.len); 1645 } else 1646 _lto3b(size, cmd.len); 1647 return (scsipi_command(st->sc_periph, 1648 (void *)&cmd, sizeof(cmd), (void *)bf, size, 0, ST_IO_TIME, NULL, 1649 flags | XS_CTL_DATA_IN)); 1650 } 1651 1652 /* 1653 * issue an erase command 1654 */ 1655 static int 1656 st_erase(struct st_softc *st, int full, int flags) 1657 { 1658 int tmo; 1659 struct scsi_erase cmd; 1660 1661 /* 1662 * Full erase means set LONG bit in erase command, which asks 1663 * the drive to erase the entire unit. Without this bit, we're 1664 * asking the drive to write an erase gap. 1665 */ 1666 memset(&cmd, 0, sizeof(cmd)); 1667 cmd.opcode = ERASE; 1668 if (full) { 1669 cmd.byte2 = SE_LONG; 1670 tmo = ST_SPC_TIME; 1671 } else { 1672 tmo = ST_IO_TIME; 1673 } 1674 1675 /* 1676 * XXX We always do this asynchronously, for now, unless the device 1677 * has the ST_Q_ERASE_NOIMM quirk. How long should we wait if we 1678 * want to (eventually) to it synchronously? 1679 */ 1680 if ((st->quirks & ST_Q_ERASE_NOIMM) == 0) 1681 cmd.byte2 |= SE_IMMED; 1682 1683 return (scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1684 ST_RETRIES, tmo, NULL, flags)); 1685 } 1686 1687 /* 1688 * skip N blocks/filemarks/seq filemarks/eom 1689 */ 1690 static int 1691 st_space(struct st_softc *st, int number, u_int what, int flags) 1692 { 1693 struct scsi_space cmd; 1694 int error; 1695 1696 switch (what) { 1697 case SP_BLKS: 1698 if (st->flags & ST_PER_ACTION) { 1699 if (number > 0) { 1700 st->flags &= ~ST_PER_ACTION; 1701 return (EIO); 1702 } else if (number < 0) { 1703 if (st->flags & ST_AT_FILEMARK) { 1704 /* 1705 * Handling of ST_AT_FILEMARK 1706 * in st_space will fill in the 1707 * right file mark count. 1708 */ 1709 error = st_space(st, 0, SP_FILEMARKS, 1710 flags); 1711 if (error) 1712 return (error); 1713 } 1714 if (st->flags & ST_BLANK_READ) { 1715 st->flags &= ~ST_BLANK_READ; 1716 return (EIO); 1717 } 1718 st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); 1719 } 1720 } 1721 break; 1722 case SP_FILEMARKS: 1723 if (st->flags & ST_EIO_PENDING) { 1724 if (number > 0) { 1725 /* pretend we just discovered the error */ 1726 st->flags &= ~ST_EIO_PENDING; 1727 return (EIO); 1728 } else if (number < 0) { 1729 /* back away from the error */ 1730 st->flags &= ~ST_EIO_PENDING; 1731 } 1732 } 1733 if (st->flags & ST_AT_FILEMARK) { 1734 st->flags &= ~ST_AT_FILEMARK; 1735 number--; 1736 } 1737 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 1738 /* back away from unwritten tape */ 1739 st->flags &= ~ST_BLANK_READ; 1740 number++; /* XXX dubious */ 1741 } 1742 break; 1743 case SP_EOM: 1744 if (st->flags & ST_EOM_PENDING) { 1745 /* we're already there */ 1746 st->flags &= ~ST_EOM_PENDING; 1747 return (0); 1748 } 1749 if (st->flags & ST_EIO_PENDING) { 1750 /* pretend we just discovered the error */ 1751 st->flags &= ~ST_EIO_PENDING; 1752 return (EIO); 1753 } 1754 if (st->flags & ST_AT_FILEMARK) 1755 st->flags &= ~ST_AT_FILEMARK; 1756 break; 1757 } 1758 if (number == 0) 1759 return (0); 1760 1761 memset(&cmd, 0, sizeof(cmd)); 1762 cmd.opcode = SPACE; 1763 cmd.byte2 = what; 1764 _lto3b(number, cmd.number); 1765 1766 st->flags &= ~ST_POSUPDATED; 1767 st->last_ctl_resid = 0; 1768 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1769 0, ST_SPC_TIME, NULL, flags); 1770 1771 if (error == 0 && (st->flags & ST_POSUPDATED) == 0) { 1772 number = number - st->last_ctl_resid; 1773 if (what == SP_BLKS) { 1774 if (st->blkno != -1) { 1775 st->blkno += number; 1776 } 1777 } else if (what == SP_FILEMARKS) { 1778 if (st->fileno != -1) { 1779 st->fileno += number; 1780 if (number > 0) { 1781 st->blkno = 0; 1782 } else if (number < 0) { 1783 st->blkno = -1; 1784 } 1785 } 1786 } else if (what == SP_EOM) { 1787 /* 1788 * This loses us relative position. 1789 */ 1790 st->fileno = st->blkno = -1; 1791 } 1792 } 1793 return (error); 1794 } 1795 1796 /* 1797 * write N filemarks 1798 */ 1799 static int 1800 st_write_filemarks(struct st_softc *st, int number, int flags) 1801 { 1802 int error; 1803 struct scsi_write_filemarks cmd; 1804 1805 /* 1806 * It's hard to write a negative number of file marks. 1807 * Don't try. 1808 */ 1809 if (number < 0) 1810 return (EINVAL); 1811 switch (number) { 1812 case 0: /* really a command to sync the drive's buffers */ 1813 break; 1814 case 1: 1815 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 1816 st->flags &= ~ST_WRITTEN; 1817 else 1818 st->flags |= ST_FM_WRITTEN; 1819 st->flags &= ~ST_PER_ACTION; 1820 break; 1821 default: 1822 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 1823 } 1824 1825 memset(&cmd, 0, sizeof(cmd)); 1826 cmd.opcode = WRITE_FILEMARKS; 1827 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1828 cmd.byte2 = SR_IMMED; 1829 /* 1830 * The ATAPI Onstream DI-30 doesn't support writing filemarks, but 1831 * WRITE_FILEMARKS is still used to flush the buffer 1832 */ 1833 if ((st->quirks & ST_Q_NOFILEMARKS) == 0) 1834 _lto3b(number, cmd.number); 1835 1836 /* XXX WE NEED TO BE ABLE TO GET A RESIDIUAL XXX */ 1837 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1838 0, ST_IO_TIME * 4, NULL, flags); 1839 if (error == 0 && st->fileno != -1) { 1840 st->fileno += number; 1841 } 1842 return (error); 1843 } 1844 1845 /* 1846 * Make sure the right number of file marks is on tape if the 1847 * tape has been written. If the position argument is true, 1848 * leave the tape positioned where it was originally. 1849 * 1850 * nmarks returns the number of marks to skip (or, if position 1851 * true, which were skipped) to get back original position. 1852 */ 1853 static int 1854 st_check_eod(struct st_softc *st, boolean position, int *nmarks, int flags) 1855 { 1856 int error; 1857 1858 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 1859 default: 1860 *nmarks = 0; 1861 return (0); 1862 case ST_WRITTEN: 1863 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 1864 *nmarks = 1; 1865 break; 1866 case ST_WRITTEN | ST_2FM_AT_EOD: 1867 *nmarks = 2; 1868 } 1869 error = st_write_filemarks(st, *nmarks, flags); 1870 if (position && !error) 1871 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 1872 return (error); 1873 } 1874 1875 /* 1876 * load/unload/retension 1877 */ 1878 static int 1879 st_load(struct st_softc *st, u_int type, int flags) 1880 { 1881 int error; 1882 struct scsi_load cmd; 1883 1884 if (type != LD_LOAD) { 1885 int nmarks; 1886 1887 error = st_check_eod(st, FALSE, &nmarks, flags); 1888 if (error) { 1889 aprint_error_dev(&st->sc_dev, "failed to write closing filemarks at " 1890 "unload, errno=%d\n", error); 1891 return (error); 1892 } 1893 } 1894 if (st->quirks & ST_Q_IGNORE_LOADS) { 1895 if (type == LD_LOAD) { 1896 /* 1897 * If we ignore loads, at least we should try a rewind. 1898 */ 1899 return st_rewind(st, 0, flags); 1900 } 1901 /* otherwise, we should do what's asked of us */ 1902 } 1903 1904 memset(&cmd, 0, sizeof(cmd)); 1905 cmd.opcode = LOAD; 1906 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1907 cmd.byte2 = SR_IMMED; 1908 cmd.how = type; 1909 1910 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1911 ST_RETRIES, ST_SPC_TIME, NULL, flags); 1912 if (error) { 1913 aprint_error_dev(&st->sc_dev, "error %d in st_load (op %d)\n", 1914 error, type); 1915 } 1916 return (error); 1917 } 1918 1919 /* 1920 * Rewind the device 1921 */ 1922 static int 1923 st_rewind(struct st_softc *st, u_int immediate, int flags) 1924 { 1925 struct scsi_rewind cmd; 1926 int error; 1927 int nmarks; 1928 int timeout; 1929 1930 error = st_check_eod(st, FALSE, &nmarks, flags); 1931 if (error) { 1932 aprint_error_dev(&st->sc_dev, "failed to write closing filemarks at " 1933 "rewind, errno=%d\n", error); 1934 return (error); 1935 } 1936 st->flags &= ~ST_PER_ACTION; 1937 1938 /* If requestor asked for immediate response, set a short timeout */ 1939 timeout = immediate ? ST_CTL_TIME : ST_SPC_TIME; 1940 1941 /* 1942 * ATAPI tapes always need immediate to be set 1943 */ 1944 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1945 immediate = SR_IMMED; 1946 1947 memset(&cmd, 0, sizeof(cmd)); 1948 cmd.opcode = REWIND; 1949 cmd.byte2 = immediate; 1950 1951 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1952 ST_RETRIES, timeout, NULL, flags); 1953 if (error) { 1954 aprint_error_dev(&st->sc_dev, "error %d trying to rewind\n", 1955 error); 1956 /* lost position */ 1957 st->fileno = st->blkno = -1; 1958 } else { 1959 st->fileno = st->blkno = 0; 1960 } 1961 return (error); 1962 } 1963 1964 static int 1965 st_rdpos(struct st_softc *st, int hard, u_int32_t *blkptr) 1966 { 1967 int error; 1968 u_int8_t posdata[20]; 1969 struct scsi_tape_read_position cmd; 1970 1971 /* 1972 * We try and flush any buffered writes here if we were writing 1973 * and we're trying to get hardware block position. It eats 1974 * up performance substantially, but I'm wary of drive firmware. 1975 * 1976 * I think that *logical* block position is probably okay- 1977 * but hardware block position might have to wait for data 1978 * to hit media to be valid. Caveat Emptor. 1979 */ 1980 1981 if (hard && (st->flags & ST_WRITTEN)) { 1982 /* 1983 * First flush any pending writes... 1984 */ 1985 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 1986 /* 1987 * The latter case is for 'write protected' tapes 1988 * which are too stupid to recognize a zero count 1989 * for writing filemarks as a no-op. 1990 */ 1991 if (error != 0 && error != EACCES && error != EROFS) 1992 return (error); 1993 } 1994 1995 memset(&cmd, 0, sizeof(cmd)); 1996 memset(&posdata, 0, sizeof(posdata)); 1997 cmd.opcode = READ_POSITION; 1998 if (hard) 1999 cmd.byte1 = 1; 2000 2001 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 2002 (void *)&posdata, sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, 2003 XS_CTL_SILENT | XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); 2004 2005 if (error == 0) { 2006 #if 0 2007 printf("posdata:"); 2008 for (hard = 0; hard < sizeof(posdata); hard++) 2009 printf("%02x ", posdata[hard] & 0xff); 2010 printf("\n"); 2011 #endif 2012 if (posdata[0] & 0x4) /* Block Position Unknown */ 2013 error = EINVAL; 2014 else 2015 *blkptr = _4btol(&posdata[4]); 2016 } 2017 return (error); 2018 } 2019 2020 static int 2021 st_setpos(struct st_softc *st, int hard, u_int32_t *blkptr) 2022 { 2023 int error; 2024 struct scsi_tape_locate cmd; 2025 2026 /* 2027 * We used to try and flush any buffered writes here. 2028 * Now we push this onto user applications to either 2029 * flush the pending writes themselves (via a zero count 2030 * WRITE FILEMARKS command) or they can trust their tape 2031 * drive to do this correctly for them. 2032 * 2033 * There are very ugly performance limitations otherwise. 2034 */ 2035 2036 memset(&cmd, 0, sizeof(cmd)); 2037 cmd.opcode = LOCATE; 2038 if (hard) 2039 cmd.byte2 = 1 << 2; 2040 _lto4b(*blkptr, cmd.blkaddr); 2041 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 2042 ST_RETRIES, ST_SPC_TIME, NULL, 0); 2043 /* 2044 * Note file && block number position now unknown (if 2045 * these things ever start being maintained in this driver) 2046 */ 2047 st->fileno = st->blkno = -1; 2048 return (error); 2049 } 2050 2051 2052 /* 2053 * Look at the returned sense and act on the error and determine 2054 * the unix error number to pass back..., 0 (== report no error), 2055 * -1 = retry the operation, -2 continue error processing. 2056 */ 2057 static int 2058 st_interpret_sense(struct scsipi_xfer *xs) 2059 { 2060 struct scsipi_periph *periph = xs->xs_periph; 2061 struct scsi_sense_data *sense = &xs->sense.scsi_sense; 2062 struct buf *bp = xs->bp; 2063 struct st_softc *st = (void *)periph->periph_dev; 2064 int retval = EJUSTRETURN; 2065 int doprint = ((xs->xs_control & XS_CTL_SILENT) == 0); 2066 u_int8_t key; 2067 int32_t info; 2068 2069 /* 2070 * If it isn't a extended or extended/deferred error, let 2071 * the generic code handle it. 2072 */ 2073 if (SSD_RCODE(sense->response_code) != SSD_RCODE_CURRENT && 2074 SSD_RCODE(sense->response_code) != SSD_RCODE_DEFERRED) 2075 return (retval); 2076 2077 if (sense->response_code & SSD_RCODE_VALID) 2078 info = _4btol(sense->info); 2079 else 2080 info = (st->flags & ST_FIXEDBLOCKS) ? 2081 xs->datalen / st->blksize : xs->datalen; 2082 key = SSD_SENSE_KEY(sense->flags); 2083 st->mt_erreg = key; 2084 st->asc = sense->asc; 2085 st->ascq = sense->ascq; 2086 st->mt_resid = (short) info; 2087 2088 if (key == SKEY_NOT_READY && st->asc == 0x4 && st->ascq == 0x1) { 2089 /* Not Ready, Logical Unit Is in Process Of Becoming Ready */ 2090 if (!callout_pending(&periph->periph_callout)) 2091 scsipi_periph_freeze(periph, 1); 2092 callout_reset(&periph->periph_callout, 2093 hz, scsipi_periph_timed_thaw, periph); 2094 return (ERESTART); 2095 } 2096 2097 /* 2098 * If the device is not open yet, let generic handle 2099 */ 2100 if ((periph->periph_flags & PERIPH_OPEN) == 0) { 2101 return (retval); 2102 } 2103 2104 xs->resid = info; 2105 if (st->flags & ST_FIXEDBLOCKS) { 2106 if (bp) { 2107 xs->resid *= st->blksize; 2108 st->last_io_resid = xs->resid; 2109 } else { 2110 st->last_ctl_resid = xs->resid; 2111 } 2112 if (key == SKEY_VOLUME_OVERFLOW) { 2113 st->flags |= ST_EIO_PENDING; 2114 if (bp) 2115 bp->b_resid = xs->resid; 2116 } else if (sense->flags & SSD_EOM) { 2117 if ((st->flags & ST_EARLYWARN) == 0) 2118 st->flags |= ST_EIO_PENDING; 2119 st->flags |= ST_EOM_PENDING; 2120 if (bp) { 2121 #if 0 2122 bp->b_resid = xs->resid; 2123 #else 2124 /* 2125 * Grotesque as it seems, the few times 2126 * I've actually seen a non-zero resid, 2127 * the tape drive actually lied and had 2128 * written all the data! 2129 */ 2130 bp->b_resid = 0; 2131 #endif 2132 } 2133 } 2134 if (sense->flags & SSD_FILEMARK) { 2135 st->flags |= ST_AT_FILEMARK; 2136 if (bp) 2137 bp->b_resid = xs->resid; 2138 if (st->fileno != (daddr_t) -1) { 2139 st->fileno++; 2140 st->blkno = 0; 2141 st->flags |= ST_POSUPDATED; 2142 } 2143 } 2144 if (sense->flags & SSD_ILI) { 2145 st->flags |= ST_EIO_PENDING; 2146 if (bp) 2147 bp->b_resid = xs->resid; 2148 if (sense->response_code & SSD_RCODE_VALID && 2149 (xs->xs_control & XS_CTL_SILENT) == 0) 2150 aprint_error_dev(&st->sc_dev, "block wrong size, %d blocks " 2151 "residual\n", info); 2152 2153 /* 2154 * This quirk code helps the drive read 2155 * the first tape block, regardless of 2156 * format. That is required for these 2157 * drives to return proper MODE SENSE 2158 * information. 2159 */ 2160 if ((st->quirks & ST_Q_SENSE_HELP) && 2161 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 2162 st->blksize -= 512; 2163 else if ((st->flags & ST_POSUPDATED) == 0) { 2164 if (st->blkno != (daddr_t) -1) { 2165 st->blkno += 2166 (xs->datalen / st->blksize); 2167 st->flags |= ST_POSUPDATED; 2168 } 2169 } 2170 } 2171 /* 2172 * If data wanted and no data was transferred, do it immediately 2173 */ 2174 if (xs->datalen && xs->resid >= xs->datalen) { 2175 if (st->flags & ST_EIO_PENDING) 2176 return (EIO); 2177 if (st->flags & ST_AT_FILEMARK) { 2178 if (bp) 2179 bp->b_resid = xs->resid; 2180 return (0); 2181 } 2182 } 2183 } else { /* must be variable mode */ 2184 if (bp) { 2185 st->last_io_resid = xs->resid; 2186 } else { 2187 st->last_ctl_resid = xs->resid; 2188 } 2189 if (sense->flags & SSD_EOM) { 2190 /* 2191 * The current semantics of this 2192 * driver requires EOM detection 2193 * to return EIO unless early 2194 * warning detection is enabled 2195 * for variable mode (this is always 2196 * on for fixed block mode). 2197 */ 2198 if (st->flags & ST_EARLYWARN) { 2199 st->flags |= ST_EOM_PENDING; 2200 retval = 0; 2201 } else { 2202 retval = EIO; 2203 } 2204 2205 /* 2206 * If it's an unadorned EOM detection, 2207 * suppress printing an error. 2208 */ 2209 if (key == SKEY_NO_SENSE) { 2210 doprint = 0; 2211 } 2212 } else if (sense->flags & SSD_FILEMARK) { 2213 retval = 0; 2214 if (st->fileno != (daddr_t) -1) { 2215 st->fileno++; 2216 st->blkno = 0; 2217 st->flags |= ST_POSUPDATED; 2218 } 2219 } else if (sense->flags & SSD_ILI) { 2220 if (info < 0) { 2221 /* 2222 * The tape record was bigger than the read 2223 * we issued. 2224 */ 2225 if ((xs->xs_control & XS_CTL_SILENT) == 0) { 2226 aprint_error_dev(&st->sc_dev, 2227 "%d-byte tape record too big" 2228 " for %d-byte user buffer\n", 2229 xs->datalen - info, xs->datalen); 2230 } 2231 retval = EIO; 2232 } else { 2233 retval = 0; 2234 if (st->blkno != (daddr_t) -1) { 2235 st->blkno++; 2236 st->flags |= ST_POSUPDATED; 2237 } 2238 } 2239 } 2240 if (bp) 2241 bp->b_resid = info; 2242 } 2243 2244 #ifndef SCSIPI_DEBUG 2245 if (retval == 0 && key == SKEY_NO_SENSE) 2246 doprint = 0; 2247 #endif 2248 if (key == SKEY_BLANK_CHECK) { 2249 /* 2250 * This quirk code helps the drive read the 2251 * first tape block, regardless of format. That 2252 * is required for these drives to return proper 2253 * MODE SENSE information. 2254 */ 2255 if ((st->quirks & ST_Q_SENSE_HELP) && 2256 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 2257 /* still starting */ 2258 st->blksize -= 512; 2259 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 2260 st->flags |= ST_BLANK_READ; 2261 xs->resid = xs->datalen; 2262 if (bp) { 2263 bp->b_resid = xs->resid; 2264 /* return an EOF */ 2265 } 2266 retval = 0; 2267 /* lost position */ 2268 st->fileno = st->blkno = -1; 2269 } 2270 } 2271 2272 /* 2273 * If generic sense processing will continue, we should not 2274 * print sense info here. 2275 */ 2276 if (retval == EJUSTRETURN) 2277 doprint = 0; 2278 2279 if (doprint) { 2280 #ifdef SCSIVERBOSE 2281 scsipi_print_sense(xs, 0); 2282 #else 2283 scsipi_printaddr(periph); 2284 printf("Sense Key 0x%02x", key); 2285 if ((sense->response_code & SSD_RCODE_VALID) != 0) { 2286 switch (key) { 2287 case SKEY_NOT_READY: 2288 case SKEY_ILLEGAL_REQUEST: 2289 case SKEY_UNIT_ATTENTION: 2290 case SKEY_DATA_PROTECT: 2291 break; 2292 case SKEY_VOLUME_OVERFLOW: 2293 case SKEY_BLANK_CHECK: 2294 printf(", requested size: %d (decimal)", info); 2295 break; 2296 case SKEY_ABORTED_COMMAND: 2297 if (xs->xs_retries) 2298 printf(", retrying"); 2299 printf(", cmd 0x%x, info 0x%x", 2300 xs->cmd->opcode, info); 2301 break; 2302 default: 2303 printf(", info = %d (decimal)", info); 2304 } 2305 } 2306 if (sense->extra_len != 0) { 2307 int n; 2308 printf(", data ="); 2309 for (n = 0; n < sense->extra_len; n++) 2310 printf(" %02x", sense->csi[n]); 2311 } 2312 printf("\n"); 2313 #endif 2314 } 2315 return (retval); 2316 } 2317 2318 /* 2319 * The quirk here is that the drive returns some value to st_mode_sense 2320 * incorrectly until the tape has actually passed by the head. 2321 * 2322 * The method is to set the drive to large fixed-block state (user-specified 2323 * density and 1024-byte blocks), then read and rewind to get it to sense the 2324 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 2325 * work, as a last resort, try variable- length blocks. The result will be 2326 * the ability to do an accurate st_mode_sense. 2327 * 2328 * We know we can do a rewind because we just did a load, which implies rewind. 2329 * Rewind seems preferable to space backward if we have a virgin tape. 2330 * 2331 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 2332 * error processing, both part of st_interpret_sense. 2333 */ 2334 static int 2335 st_touch_tape(struct st_softc *st) 2336 { 2337 char *bf; 2338 int readsize; 2339 int error; 2340 2341 bf = malloc(1024, M_TEMP, M_NOWAIT); 2342 if (bf == NULL) 2343 return (ENOMEM); 2344 2345 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 2346 goto bad; 2347 2348 /* 2349 * If the block size is already known from the 2350 * sense data, use it. Else start probing at 1024. 2351 */ 2352 if (st->media_blksize > 0) 2353 st->blksize = st->media_blksize; 2354 else 2355 st->blksize = 1024; 2356 2357 do { 2358 switch (st->blksize) { 2359 case 512: 2360 case 1024: 2361 readsize = st->blksize; 2362 st->flags |= ST_FIXEDBLOCKS; 2363 break; 2364 default: 2365 readsize = 1; 2366 st->flags &= ~ST_FIXEDBLOCKS; 2367 } 2368 if ((error = st->ops(st, ST_OPS_MODESELECT, XS_CTL_SILENT)) 2369 != 0) { 2370 /* 2371 * The device did not agree with the proposed 2372 * block size. If we exhausted our options, 2373 * return failure, else try another. 2374 */ 2375 if (readsize == 1) 2376 goto bad; 2377 st->blksize -= 512; 2378 continue; 2379 } 2380 st_read(st, bf, readsize, XS_CTL_SILENT); /* XXX */ 2381 if ((error = st_rewind(st, 0, 0)) != 0) { 2382 bad: free(bf, M_TEMP); 2383 return (error); 2384 } 2385 } while (readsize != 1 && readsize > st->blksize); 2386 2387 free(bf, M_TEMP); 2388 return (0); 2389 } 2390 2391 static int 2392 stdump(dev_t dev, daddr_t blkno, void *va, 2393 size_t size) 2394 { 2395 2396 /* Not implemented. */ 2397 return (ENXIO); 2398 } 2399