1 /* $NetBSD: st.c,v 1.191 2006/06/07 22:33:37 kardel 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 1.191 2006/06/07 22:33:37 kardel 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 #include <sys/iostat.h> 80 #include <sys/sysctl.h> 81 82 #include <dev/scsipi/scsi_spc.h> 83 #include <dev/scsipi/scsipi_all.h> 84 #include <dev/scsipi/scsi_all.h> 85 #include <dev/scsipi/scsi_tape.h> 86 #include <dev/scsipi/scsipiconf.h> 87 #include <dev/scsipi/scsipi_base.h> 88 #include <dev/scsipi/stvar.h> 89 90 /* Defines for device specific stuff */ 91 #define DEF_FIXED_BSIZE 512 92 93 #define STMODE(z) ( minor(z) & 0x03) 94 #define STDSTY(z) ((minor(z) >> 2) & 0x03) 95 #define STUNIT(z) ((minor(z) >> 4) ) 96 #define STNMINOR 16 97 98 #define NORMAL_MODE 0 99 #define NOREW_MODE 1 100 #define EJECT_MODE 2 101 #define CTRL_MODE 3 102 103 #define FALSE 0 104 #define TRUE 1 105 106 #ifndef ST_MOUNT_DELAY 107 #define ST_MOUNT_DELAY 0 108 #endif 109 110 static dev_type_open(stopen); 111 static dev_type_close(stclose); 112 static dev_type_read(stread); 113 static dev_type_write(stwrite); 114 static dev_type_ioctl(stioctl); 115 static dev_type_strategy(ststrategy); 116 static dev_type_dump(stdump); 117 118 const struct bdevsw st_bdevsw = { 119 stopen, stclose, ststrategy, stioctl, stdump, nosize, D_TAPE 120 }; 121 122 const struct cdevsw st_cdevsw = { 123 stopen, stclose, stread, stwrite, stioctl, 124 nostop, notty, nopoll, nommap, nokqfilter, D_TAPE 125 }; 126 127 /* 128 * Define various devices that we know mis-behave in some way, 129 * and note how they are bad, so we can correct for them 130 */ 131 132 static const struct st_quirk_inquiry_pattern st_quirk_patterns[] = { 133 {{T_SEQUENTIAL, T_REMOV, 134 " ", " ", " "}, {0, 0, { 135 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 136 {ST_Q_FORCE_BLKSIZE, 512, QIC_24}, /* minor 4-7 */ 137 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_1600}, /* minor 8-11 */ 138 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_6250} /* minor 12-15 */ 139 }}}, 140 {{T_SEQUENTIAL, T_REMOV, 141 "TANDBERG", " TDC 3600 ", ""}, {0, 12, { 142 {0, 0, 0}, /* minor 0-3 */ 143 {ST_Q_FORCE_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 144 {0, 0, QIC_150}, /* minor 8-11 */ 145 {0, 0, QIC_120} /* minor 12-15 */ 146 }}}, 147 {{T_SEQUENTIAL, T_REMOV, 148 "TANDBERG", " TDC 3800 ", ""}, {0, 0, { 149 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 150 {0, 0, QIC_525}, /* minor 4-7 */ 151 {0, 0, QIC_150}, /* minor 8-11 */ 152 {0, 0, QIC_120} /* minor 12-15 */ 153 }}}, 154 {{T_SEQUENTIAL, T_REMOV, 155 "TANDBERG", " SLR5 4/8GB ", ""}, {0, 0, { 156 {ST_Q_FORCE_BLKSIZE, 1024, 0}, /* minor 0-3 */ 157 {0, 0, 0}, /* minor 4-7 */ 158 {0, 0, 0}, /* minor 8-11 */ 159 {0, 0, 0} /* minor 12-15 */ 160 }}}, 161 /* 162 * lacking a manual for the 4200, it's not clear what the 163 * specific density codes should be- the device is a 2.5GB 164 * capable QIC drive, those density codes aren't readily 165 * availabel. The 'default' will just have to do. 166 */ 167 {{T_SEQUENTIAL, T_REMOV, 168 "TANDBERG", " TDC 4200 ", ""}, {0, 0, { 169 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 170 {0, 0, QIC_525}, /* minor 4-7 */ 171 {0, 0, QIC_150}, /* minor 8-11 */ 172 {0, 0, QIC_120} /* minor 12-15 */ 173 }}}, 174 /* 175 * At least -005 and -007 need this. I'll assume they all do unless I 176 * hear otherwise. - mycroft, 31MAR1994 177 */ 178 {{T_SEQUENTIAL, T_REMOV, 179 "ARCHIVE ", "VIPER 2525 25462", ""}, {0, 0, { 180 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 181 {ST_Q_SENSE_HELP, 0, QIC_525}, /* minor 4-7 */ 182 {0, 0, QIC_150}, /* minor 8-11 */ 183 {0, 0, QIC_120} /* minor 12-15 */ 184 }}}, 185 /* 186 * One user reports that this works for his tape drive. It probably 187 * needs more work. - mycroft, 09APR1994 188 */ 189 {{T_SEQUENTIAL, T_REMOV, 190 "SANKYO ", "CP525 ", ""}, {0, 0, { 191 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 192 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 193 {0, 0, QIC_150}, /* minor 8-11 */ 194 {0, 0, QIC_120} /* minor 12-15 */ 195 }}}, 196 {{T_SEQUENTIAL, T_REMOV, 197 "ANRITSU ", "DMT780 ", ""}, {0, 0, { 198 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 199 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 200 {0, 0, QIC_150}, /* minor 8-11 */ 201 {0, 0, QIC_120} /* minor 12-15 */ 202 }}}, 203 {{T_SEQUENTIAL, T_REMOV, 204 "ARCHIVE ", "VIPER 150 21247", ""}, {ST_Q_ERASE_NOIMM, 12, { 205 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 206 {0, 0, QIC_150}, /* minor 4-7 */ 207 {0, 0, QIC_120}, /* minor 8-11 */ 208 {0, 0, QIC_24} /* minor 12-15 */ 209 }}}, 210 {{T_SEQUENTIAL, T_REMOV, 211 "ARCHIVE ", "VIPER 150 21531", ""}, {ST_Q_ERASE_NOIMM, 12, { 212 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 213 {0, 0, QIC_150}, /* minor 4-7 */ 214 {0, 0, QIC_120}, /* minor 8-11 */ 215 {0, 0, QIC_24} /* minor 12-15 */ 216 }}}, 217 {{T_SEQUENTIAL, T_REMOV, 218 "WANGTEK ", "5099ES SCSI", ""}, {0, 0, { 219 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 220 {0, 0, QIC_11}, /* minor 4-7 */ 221 {0, 0, QIC_24}, /* minor 8-11 */ 222 {0, 0, QIC_24} /* minor 12-15 */ 223 }}}, 224 {{T_SEQUENTIAL, T_REMOV, 225 "WANGTEK ", "5150ES SCSI", ""}, {0, 0, { 226 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 227 {0, 0, QIC_24}, /* minor 4-7 */ 228 {0, 0, QIC_120}, /* minor 8-11 */ 229 {0, 0, QIC_150} /* minor 12-15 */ 230 }}}, 231 {{T_SEQUENTIAL, T_REMOV, 232 "WANGTEK ", "5525ES SCSI REV7", ""}, {0, 0, { 233 {0, 0, 0}, /* minor 0-3 */ 234 {ST_Q_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 235 {0, 0, QIC_150}, /* minor 8-11 */ 236 {0, 0, QIC_120} /* minor 12-15 */ 237 }}}, 238 {{T_SEQUENTIAL, T_REMOV, 239 "WangDAT ", "Model 1300 ", ""}, {0, 0, { 240 {0, 0, 0}, /* minor 0-3 */ 241 {ST_Q_FORCE_BLKSIZE, 512, DDS}, /* minor 4-7 */ 242 {ST_Q_FORCE_BLKSIZE, 1024, DDS}, /* minor 8-11 */ 243 {ST_Q_FORCE_BLKSIZE, 0, DDS} /* minor 12-15 */ 244 }}}, 245 {{T_SEQUENTIAL, T_REMOV, 246 "EXABYTE ", "EXB-8200 ", "263H"}, {0, 5, { 247 {0, 0, 0}, /* minor 0-3 */ 248 {0, 0, 0}, /* minor 4-7 */ 249 {0, 0, 0}, /* minor 8-11 */ 250 {0, 0, 0} /* minor 12-15 */ 251 }}}, 252 {{T_SEQUENTIAL, T_REMOV, 253 "STK", "9490", ""}, 254 {ST_Q_FORCE_BLKSIZE, 0, { 255 {0, 0, 0}, /* minor 0-3 */ 256 {0, 0, 0}, /* minor 4-7 */ 257 {0, 0, 0}, /* minor 8-11 */ 258 {0, 0, 0} /* minor 12-15 */ 259 }}}, 260 {{T_SEQUENTIAL, T_REMOV, 261 "STK", "SD-3", ""}, 262 {ST_Q_FORCE_BLKSIZE, 0, { 263 {0, 0, 0}, /* minor 0-3 */ 264 {0, 0, 0}, /* minor 4-7 */ 265 {0, 0, 0}, /* minor 8-11 */ 266 {0, 0, 0} /* minor 12-15 */ 267 }}}, 268 {{T_SEQUENTIAL, T_REMOV, 269 "IBM", "03590", ""}, {ST_Q_IGNORE_LOADS, 0, { 270 {0, 0, 0}, /* minor 0-3 */ 271 {0, 0, 0}, /* minor 4-7 */ 272 {0, 0, 0}, /* minor 8-11 */ 273 {0, 0, 0} /* minor 12-15 */ 274 }}}, 275 {{T_SEQUENTIAL, T_REMOV, 276 "HP ", "T4000s ", ""}, {ST_Q_UNIMODAL, 0, { 277 {0, 0, QIC_3095}, /* minor 0-3 */ 278 {0, 0, QIC_3095}, /* minor 4-7 */ 279 {0, 0, QIC_3095}, /* minor 8-11 */ 280 {0, 0, QIC_3095}, /* minor 12-15 */ 281 }}}, 282 #if 0 283 {{T_SEQUENTIAL, T_REMOV, 284 "EXABYTE ", "EXB-8200 ", ""}, {0, 12, { 285 {0, 0, 0}, /* minor 0-3 */ 286 {0, 0, 0}, /* minor 4-7 */ 287 {0, 0, 0}, /* minor 8-11 */ 288 {0, 0, 0} /* minor 12-15 */ 289 }}}, 290 #endif 291 {{T_SEQUENTIAL, T_REMOV, 292 "TEAC ", "MT-2ST/N50 ", ""}, {ST_Q_IGNORE_LOADS, 0, { 293 {0, 0, 0}, /* minor 0-3 */ 294 {0, 0, 0}, /* minor 4-7 */ 295 {0, 0, 0}, /* minor 8-11 */ 296 {0, 0, 0} /* minor 12-15 */ 297 }}}, 298 {{T_SEQUENTIAL, T_REMOV, 299 "OnStream", "ADR50 Drive", ""}, {ST_Q_UNIMODAL, 0, { 300 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 301 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 4-7 */ 302 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 8-11 */ 303 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 12-15 */ 304 }}}, 305 {{T_SEQUENTIAL, T_REMOV, 306 "OnStream DI-30", "", "1.0"}, {ST_Q_NOFILEMARKS, 0, { 307 {0, 0, 0}, /* minor 0-3 */ 308 {0, 0, 0}, /* minor 4-7 */ 309 {0, 0, 0}, /* minor 8-11 */ 310 {0, 0, 0} /* minor 12-15 */ 311 }}}, 312 {{T_SEQUENTIAL, T_REMOV, 313 "NCR H621", "0-STD-03-46F880 ", ""}, {ST_Q_NOPREVENT, 0, { 314 {0, 0, 0}, /* minor 0-3 */ 315 {0, 0, 0}, /* minor 4-7 */ 316 {0, 0, 0}, /* minor 8-11 */ 317 {0, 0, 0} /* minor 12-15 */ 318 }}}, 319 }; 320 321 #define NOEJECT 0 322 #define EJECT 1 323 324 static void st_identify_drive(struct st_softc *, 325 struct scsipi_inquiry_pattern *); 326 static void st_loadquirks(struct st_softc *); 327 static int st_mount_tape(dev_t, int); 328 static void st_unmount(struct st_softc *, boolean); 329 static int st_decide_mode(struct st_softc *, boolean); 330 static void ststart(struct scsipi_periph *); 331 static void strestart(void *); 332 static void stdone(struct scsipi_xfer *, int); 333 static int st_read(struct st_softc *, char *, int, int); 334 static int st_space(struct st_softc *, int, u_int, int); 335 static int st_write_filemarks(struct st_softc *, int, int); 336 static int st_check_eod(struct st_softc *, boolean, int *, int); 337 static int st_load(struct st_softc *, u_int, int); 338 static int st_rewind(struct st_softc *, u_int, int); 339 static int st_interpret_sense(struct scsipi_xfer *); 340 static int st_touch_tape(struct st_softc *); 341 static int st_erase(struct st_softc *, int full, int flags); 342 static int st_rdpos(struct st_softc *, int, u_int32_t *); 343 static int st_setpos(struct st_softc *, int, u_int32_t *); 344 345 static const struct scsipi_periphsw st_switch = { 346 st_interpret_sense, 347 ststart, 348 NULL, 349 stdone 350 }; 351 352 #if defined(ST_ENABLE_EARLYWARN) 353 #define ST_INIT_FLAGS ST_EARLYWARN 354 #else 355 #define ST_INIT_FLAGS 0 356 #endif 357 358 /* 359 * The routine called by the low level scsi routine when it discovers 360 * A device suitable for this driver 361 */ 362 void 363 stattach(struct device *parent, struct st_softc *st, void *aux) 364 { 365 struct scsipibus_attach_args *sa = aux; 366 struct scsipi_periph *periph = sa->sa_periph; 367 368 SC_DEBUG(periph, SCSIPI_DB2, ("stattach: ")); 369 370 /* 371 * Store information needed to contact our base driver 372 */ 373 st->sc_periph = periph; 374 periph->periph_dev = &st->sc_dev; 375 periph->periph_switch = &st_switch; 376 377 /* 378 * Set initial flags 379 */ 380 381 st->flags = ST_INIT_FLAGS; 382 383 /* 384 * Set up the buf queue for this device 385 */ 386 bufq_alloc(&st->buf_queue, "fcfs", 0); 387 388 callout_init(&st->sc_callout); 389 390 /* 391 * Check if the drive is a known criminal and take 392 * Any steps needed to bring it into line 393 */ 394 st_identify_drive(st, &sa->sa_inqbuf); 395 /* 396 * Use the subdriver to request information regarding the drive. 397 */ 398 printf("\n"); 399 printf("%s: %s", st->sc_dev.dv_xname, st->quirkdata ? "quirks apply, " : ""); 400 if (scsipi_test_unit_ready(periph, 401 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE) || 402 st->ops(st, ST_OPS_MODESENSE, 403 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE)) 404 printf("drive empty\n"); 405 else { 406 printf("density code %d, ", st->media_density); 407 if (st->media_blksize > 0) 408 printf("%d-byte", st->media_blksize); 409 else 410 printf("variable"); 411 printf(" blocks, write-%s\n", 412 (st->flags & ST_READONLY) ? "protected" : "enabled"); 413 } 414 415 st->stats = iostat_alloc(IOSTAT_TAPE); 416 st->stats->io_name = st->sc_dev.dv_xname; 417 418 #if NRND > 0 419 rnd_attach_source(&st->rnd_source, st->sc_dev.dv_xname, 420 RND_TYPE_TAPE, 0); 421 #endif 422 } 423 424 int 425 stactivate(struct device *self, enum devact act) 426 { 427 int rv = 0; 428 429 switch (act) { 430 case DVACT_ACTIVATE: 431 rv = EOPNOTSUPP; 432 break; 433 434 case DVACT_DEACTIVATE: 435 /* 436 * Nothing to do; we key off the device's DVF_ACTIVE. 437 */ 438 break; 439 } 440 return (rv); 441 } 442 443 int 444 stdetach(struct device *self, int flags) 445 { 446 struct st_softc *st = device_private(self); 447 int s, bmaj, cmaj, mn; 448 449 /* locate the major number */ 450 bmaj = bdevsw_lookup_major(&st_bdevsw); 451 cmaj = cdevsw_lookup_major(&st_cdevsw); 452 453 /* kill any pending restart */ 454 callout_stop(&st->sc_callout); 455 456 s = splbio(); 457 458 /* Kill off any queued buffers. */ 459 bufq_drain(st->buf_queue); 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(device_unit(self)); 470 vdevgone(bmaj, mn, mn+STNMINOR-1, VBLK); 471 vdevgone(cmaj, mn, mn+STNMINOR-1, VCHR); 472 473 iostat_free(st->stats); 474 475 #if NRND > 0 476 /* Unhook the entropy source. */ 477 rnd_detach_source(&st->rnd_source); 478 #endif 479 480 return (0); 481 } 482 483 /* 484 * Use the inquiry routine in 'scsi_base' to get drive info so we can 485 * Further tailor our behaviour. 486 */ 487 static void 488 st_identify_drive(struct st_softc *st, struct scsipi_inquiry_pattern *inqbuf) 489 { 490 const struct st_quirk_inquiry_pattern *finger; 491 int priority; 492 493 finger = scsipi_inqmatch(inqbuf, 494 st_quirk_patterns, 495 sizeof(st_quirk_patterns) / sizeof(st_quirk_patterns[0]), 496 sizeof(st_quirk_patterns[0]), &priority); 497 if (priority != 0) { 498 st->quirkdata = &finger->quirkdata; 499 st->drive_quirks = finger->quirkdata.quirks; 500 st->quirks = finger->quirkdata.quirks; /* start value */ 501 st->page_0_size = finger->quirkdata.page_0_size; 502 st_loadquirks(st); 503 } 504 } 505 506 /* 507 * initialise the subdevices to the default (QUIRK) state. 508 * this will remove any setting made by the system operator or previous 509 * operations. 510 */ 511 static void 512 st_loadquirks(struct st_softc *st) 513 { 514 int i; 515 const struct modes *mode; 516 struct modes *mode2; 517 518 mode = st->quirkdata->modes; 519 mode2 = st->modes; 520 for (i = 0; i < 4; i++) { 521 memset(mode2, 0, sizeof(struct modes)); 522 st->modeflags[i] &= ~(BLKSIZE_SET_BY_QUIRK | 523 DENSITY_SET_BY_QUIRK | BLKSIZE_SET_BY_USER | 524 DENSITY_SET_BY_USER); 525 if ((mode->quirks | st->drive_quirks) & ST_Q_FORCE_BLKSIZE) { 526 mode2->blksize = mode->blksize; 527 st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; 528 } 529 if (mode->density) { 530 mode2->density = mode->density; 531 st->modeflags[i] |= DENSITY_SET_BY_QUIRK; 532 } 533 mode2->quirks |= mode->quirks; 534 mode++; 535 mode2++; 536 } 537 } 538 539 /* 540 * open the device. 541 */ 542 static int 543 stopen(dev_t dev, int flags, int mode, struct lwp *l) 544 { 545 u_int stmode, dsty; 546 int error, sflags, unit, tries, ntries; 547 struct st_softc *st; 548 struct scsipi_periph *periph; 549 struct scsipi_adapter *adapt; 550 551 unit = STUNIT(dev); 552 if (unit >= st_cd.cd_ndevs) 553 return (ENXIO); 554 st = st_cd.cd_devs[unit]; 555 if (st == NULL) 556 return (ENXIO); 557 558 stmode = STMODE(dev); 559 dsty = STDSTY(dev); 560 561 periph = st->sc_periph; 562 adapt = periph->periph_channel->chan_adapter; 563 564 SC_DEBUG(periph, SCSIPI_DB1, ("open: dev=0x%x (unit %d (of %d))\n", dev, 565 unit, st_cd.cd_ndevs)); 566 567 568 /* 569 * Only allow one at a time 570 */ 571 if (periph->periph_flags & PERIPH_OPEN) { 572 printf("%s: already open\n", st->sc_dev.dv_xname); 573 return (EBUSY); 574 } 575 576 if ((error = scsipi_adapter_addref(adapt)) != 0) 577 return (error); 578 579 /* 580 * clear any latched errors. 581 */ 582 st->mt_resid = 0; 583 st->mt_erreg = 0; 584 st->asc = 0; 585 st->ascq = 0; 586 587 /* 588 * Catch any unit attention errors. Be silent about this 589 * unless we're already mounted. We ignore media change 590 * if we're in control mode or not mounted yet. 591 */ 592 if ((st->flags & ST_MOUNTED) == 0 || stmode == CTRL_MODE) { 593 #ifdef SCSIDEBUG 594 sflags = XS_CTL_IGNORE_MEDIA_CHANGE; 595 #else 596 sflags = XS_CTL_SILENT|XS_CTL_IGNORE_MEDIA_CHANGE; 597 #endif 598 } else 599 sflags = 0; 600 601 /* 602 * If we're already mounted or we aren't configured for 603 * a mount delay, only try a test unit ready once. Otherwise, 604 * try up to ST_MOUNT_DELAY times with a rest interval of 605 * one second between each try. 606 */ 607 608 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0) { 609 ntries = 1; 610 } else { 611 ntries = ST_MOUNT_DELAY; 612 } 613 614 for (error = tries = 0; tries < ntries; tries++) { 615 int slpintr, oflags; 616 617 /* 618 * If we had no error, or we're opening the control mode 619 * device, we jump out right away. 620 */ 621 622 error = scsipi_test_unit_ready(periph, sflags); 623 if (error == 0 || stmode == CTRL_MODE) { 624 break; 625 } 626 627 /* 628 * We had an error. 629 * 630 * If we're already mounted or we aren't configured for 631 * a mount delay, or the error isn't a NOT READY error, 632 * skip to the error exit now. 633 */ 634 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0 || 635 (st->mt_key != SKEY_NOT_READY)) { 636 goto bad; 637 } 638 639 /* 640 * clear any latched errors. 641 */ 642 st->mt_resid = 0; 643 st->mt_erreg = 0; 644 st->asc = 0; 645 st->ascq = 0; 646 647 /* 648 * Fake that we have the device open so 649 * we block other apps from getting in. 650 */ 651 652 oflags = periph->periph_flags; 653 periph->periph_flags |= PERIPH_OPEN; 654 655 slpintr = tsleep(&lbolt, PUSER|PCATCH, "stload", 0); 656 657 periph->periph_flags = oflags; /* restore flags */ 658 if (slpintr) { 659 goto bad; 660 } 661 } 662 663 664 /* 665 * If the mode is 3 (e.g. minor = 3,7,11,15) then the device has 666 * been opened to set defaults and perform other, usually non-I/O 667 * related, operations. In this case, do a quick check to see 668 * whether the unit actually had a tape loaded (this will be known 669 * as to whether or not we got a NOT READY for the above 670 * unit attention). If a tape is there, go do a mount sequence. 671 */ 672 if (stmode == CTRL_MODE && st->mt_key == SKEY_NOT_READY) { 673 periph->periph_flags |= PERIPH_OPEN; 674 return (0); 675 } 676 677 /* 678 * If we get this far and had an error set, that means we failed 679 * to pass the 'test unit ready' test for the non-controlmode device, 680 * so we bounce the open. 681 */ 682 683 if (error) 684 return (error); 685 686 /* 687 * Else, we're now committed to saying we're open. 688 */ 689 690 periph->periph_flags |= PERIPH_OPEN; /* unit attn are now errors */ 691 692 /* 693 * If it's a different mode, or if the media has been 694 * invalidated, unmount the tape from the previous 695 * session but continue with open processing 696 */ 697 if (st->last_dsty != dsty || 698 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 699 st_unmount(st, NOEJECT); 700 701 /* 702 * If we are not mounted, then we should start a new 703 * mount session. 704 */ 705 if (!(st->flags & ST_MOUNTED)) { 706 if ((error = st_mount_tape(dev, flags)) != 0) 707 goto bad; 708 st->last_dsty = dsty; 709 } 710 if (!(st->quirks & ST_Q_NOPREVENT)) { 711 scsipi_prevent(periph, SPAMR_PREVENT_DT, 712 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 713 } 714 715 SC_DEBUG(periph, SCSIPI_DB2, ("open complete\n")); 716 return (0); 717 718 bad: 719 st_unmount(st, NOEJECT); 720 scsipi_adapter_delref(adapt); 721 periph->periph_flags &= ~PERIPH_OPEN; 722 return (error); 723 } 724 725 /* 726 * close the device.. only called if we are the LAST 727 * occurence of an open device 728 */ 729 static int 730 stclose(dev_t dev, int flags, int mode, struct lwp *l) 731 { 732 int stxx, error = 0; 733 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 734 struct scsipi_periph *periph = st->sc_periph; 735 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 736 737 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("closing\n")); 738 739 /* 740 * Make sure that a tape opened in write-only mode will have 741 * file marks written on it when closed, even if not written to. 742 * 743 * This is for SUN compatibility. Actually, the Sun way of 744 * things is to: 745 * 746 * only write filemarks if there are fmks to be written and 747 * - open for write (possibly read/write) 748 * - the last operation was a write 749 * or: 750 * - opened for wronly 751 * - no data was written (including filemarks) 752 */ 753 754 stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); 755 if (((flags & FWRITE) && stxx == ST_WRITTEN) || 756 ((flags & O_ACCMODE) == FWRITE && stxx == 0)) { 757 int nm; 758 error = st_check_eod(st, FALSE, &nm, 0); 759 } 760 761 /* 762 * Allow robots to eject tape if needed. 763 */ 764 scsipi_prevent(periph, SPAMR_ALLOW, 765 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 766 767 switch (STMODE(dev)) { 768 case NORMAL_MODE: 769 st_unmount(st, NOEJECT); 770 break; 771 case NOREW_MODE: 772 case CTRL_MODE: 773 /* 774 * Leave mounted unless media seems to have been removed. 775 * 776 * Otherwise, if we're to terminate a tape with more than one 777 * filemark [ and because we're not rewinding here ], backspace 778 * one filemark so that later appends will see an unbroken 779 * sequence of: 780 * 781 * file - FMK - file - FMK ... file - FMK FMK (EOM) 782 */ 783 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 784 st_unmount(st, NOEJECT); 785 } else if (error == 0) { 786 /* 787 * ST_WRITTEN was preserved from above. 788 * 789 * All we need to know here is: 790 * 791 * Were we writing this tape and was the last 792 * operation a write? 793 * 794 * Are there supposed to be 2FM at EOD? 795 * 796 * If both statements are true, then we backspace 797 * one filemark. 798 */ 799 stxx |= (st->flags & ST_2FM_AT_EOD); 800 if ((flags & FWRITE) != 0 && 801 (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { 802 error = st_space(st, -1, SP_FILEMARKS, 0); 803 } 804 } 805 break; 806 case EJECT_MODE: 807 st_unmount(st, EJECT); 808 break; 809 } 810 811 scsipi_wait_drain(periph); 812 813 scsipi_adapter_delref(adapt); 814 periph->periph_flags &= ~PERIPH_OPEN; 815 816 return (error); 817 } 818 819 /* 820 * Start a new mount session. 821 * Copy in all the default parameters from the selected device mode. 822 * and try guess any that seem to be defaulted. 823 */ 824 static int 825 st_mount_tape(dev_t dev, int flags) 826 { 827 int unit; 828 u_int dsty; 829 struct st_softc *st; 830 struct scsipi_periph *periph; 831 int error = 0; 832 833 unit = STUNIT(dev); 834 dsty = STDSTY(dev); 835 st = st_cd.cd_devs[unit]; 836 periph = st->sc_periph; 837 838 if (st->flags & ST_MOUNTED) 839 return (0); 840 841 SC_DEBUG(periph, SCSIPI_DB1, ("mounting\n ")); 842 st->flags |= ST_NEW_MOUNT; 843 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 844 /* 845 * If the media is new, then make sure we give it a chance to 846 * to do a 'load' instruction. (We assume it is new.) 847 */ 848 if ((error = st_load(st, LD_LOAD, XS_CTL_SILENT)) != 0) 849 return (error); 850 /* 851 * Throw another dummy instruction to catch 852 * 'Unit attention' errors. Many drives give 853 * these after doing a Load instruction (with 854 * the MEDIUM MAY HAVE CHANGED asc/ascq). 855 */ 856 scsipi_test_unit_ready(periph, XS_CTL_SILENT); /* XXX */ 857 858 /* 859 * Some devices can't tell you much until they have been 860 * asked to look at the media. This quirk does this. 861 */ 862 if (st->quirks & ST_Q_SENSE_HELP) 863 if ((error = st_touch_tape(st)) != 0) 864 return (error); 865 /* 866 * Load the physical device parameters 867 * loads: blkmin, blkmax 868 */ 869 if ((error = st->ops(st, ST_OPS_RBL, 0)) != 0) 870 return (error); 871 /* 872 * Load the media dependent parameters 873 * includes: media_blksize,media_density,numblks 874 * As we have a tape in, it should be reflected here. 875 * If not you may need the "quirk" above. 876 */ 877 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 878 return (error); 879 /* 880 * If we have gained a permanent density from somewhere, 881 * then use it in preference to the one supplied by 882 * default by the driver. 883 */ 884 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 885 st->density = st->modes[dsty].density; 886 else 887 st->density = st->media_density; 888 /* 889 * If we have gained a permanent blocksize 890 * then use it in preference to the one supplied by 891 * default by the driver. 892 */ 893 st->flags &= ~ST_FIXEDBLOCKS; 894 if (st->modeflags[dsty] & 895 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 896 st->blksize = st->modes[dsty].blksize; 897 if (st->blksize) 898 st->flags |= ST_FIXEDBLOCKS; 899 } else { 900 if ((error = st_decide_mode(st, FALSE)) != 0) 901 return (error); 902 } 903 if ((error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 904 /* ATAPI will return ENODEV for this, and this may be OK */ 905 if (error != ENODEV) { 906 printf("%s: cannot set selected mode\n", 907 st->sc_dev.dv_xname); 908 return (error); 909 } 910 } 911 st->flags &= ~ST_NEW_MOUNT; 912 st->flags |= ST_MOUNTED; 913 periph->periph_flags |= PERIPH_MEDIA_LOADED; /* move earlier? */ 914 st->blkno = st->fileno = (daddr_t) 0; 915 return (0); 916 } 917 918 /* 919 * End the present mount session. 920 * Rewind, and optionally eject the tape. 921 * Reset various flags to indicate that all new 922 * operations require another mount operation 923 */ 924 static void 925 st_unmount(struct st_softc *st, boolean eject) 926 { 927 struct scsipi_periph *periph = st->sc_periph; 928 int nmarks; 929 930 if ((st->flags & ST_MOUNTED) == 0) 931 return; 932 SC_DEBUG(periph, SCSIPI_DB1, ("unmounting\n")); 933 st_check_eod(st, FALSE, &nmarks, XS_CTL_IGNORE_NOT_READY); 934 st_rewind(st, 0, XS_CTL_IGNORE_NOT_READY); 935 936 /* 937 * Section 9.3.3 of the SCSI specs states that a device shall return 938 * the density value specified in the last succesfull MODE SELECT 939 * after an unload operation, in case it is not able to 940 * automatically determine the density of the new medium. 941 * 942 * So we instruct the device to use the default density, which will 943 * prevent the use of stale density values (in particular, 944 * in st_touch_tape(). 945 */ 946 st->density = 0; 947 if (st->ops(st, ST_OPS_MODESELECT, 0) != 0) { 948 printf("%s: WARNING: cannot revert to default density\n", 949 st->sc_dev.dv_xname); 950 } 951 952 if (eject) { 953 if (!(st->quirks & ST_Q_NOPREVENT)) { 954 scsipi_prevent(periph, SPAMR_ALLOW, 955 XS_CTL_IGNORE_ILLEGAL_REQUEST | 956 XS_CTL_IGNORE_NOT_READY); 957 } 958 st_load(st, LD_UNLOAD, XS_CTL_IGNORE_NOT_READY); 959 st->blkno = st->fileno = (daddr_t) -1; 960 } else { 961 st->blkno = st->fileno = (daddr_t) 0; 962 } 963 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 964 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 965 } 966 967 /* 968 * Given all we know about the device, media, mode, 'quirks' and 969 * initial operation, make a decision as to how we should be set 970 * to run (regarding blocking and EOD marks) 971 */ 972 int 973 st_decide_mode(struct st_softc *st, boolean first_read) 974 { 975 976 SC_DEBUG(st->sc_periph, SCSIPI_DB2, ("starting block mode decision\n")); 977 978 /* 979 * If the drive can only handle fixed-length blocks and only at 980 * one size, perhaps we should just do that. 981 */ 982 if (st->blkmin && (st->blkmin == st->blkmax)) { 983 st->flags |= ST_FIXEDBLOCKS; 984 st->blksize = st->blkmin; 985 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 986 ("blkmin == blkmax of %d\n", st->blkmin)); 987 goto done; 988 } 989 /* 990 * If the tape density mandates (or even suggests) use of fixed 991 * or variable-length blocks, comply. 992 */ 993 switch (st->density) { 994 case HALFINCH_800: 995 case HALFINCH_1600: 996 case HALFINCH_6250: 997 case DDS: 998 st->flags &= ~ST_FIXEDBLOCKS; 999 st->blksize = 0; 1000 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1001 ("density specified variable\n")); 1002 goto done; 1003 case QIC_11: 1004 case QIC_24: 1005 case QIC_120: 1006 case QIC_150: 1007 case QIC_525: 1008 case QIC_1320: 1009 case QIC_3095: 1010 case QIC_3220: 1011 st->flags |= ST_FIXEDBLOCKS; 1012 if (st->media_blksize > 0) 1013 st->blksize = st->media_blksize; 1014 else 1015 st->blksize = DEF_FIXED_BSIZE; 1016 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1017 ("density specified fixed\n")); 1018 goto done; 1019 } 1020 /* 1021 * If we're about to read the tape, perhaps we should choose 1022 * fixed or variable-length blocks and block size according to 1023 * what the drive found on the tape. 1024 */ 1025 if (first_read && 1026 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 1027 (st->media_blksize == DEF_FIXED_BSIZE) || 1028 (st->media_blksize == 1024))) { 1029 if (st->media_blksize > 0) 1030 st->flags |= ST_FIXEDBLOCKS; 1031 else 1032 st->flags &= ~ST_FIXEDBLOCKS; 1033 st->blksize = st->media_blksize; 1034 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1035 ("Used media_blksize of %d\n", st->media_blksize)); 1036 goto done; 1037 } 1038 /* 1039 * We're getting no hints from any direction. Choose variable- 1040 * length blocks arbitrarily. 1041 */ 1042 st->flags &= ~ST_FIXEDBLOCKS; 1043 st->blksize = 0; 1044 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1045 ("Give up and default to variable mode\n")); 1046 1047 done: 1048 /* 1049 * Decide whether or not to write two file marks to signify end- 1050 * of-data. Make the decision as a function of density. If 1051 * the decision is not to use a second file mark, the SCSI BLANK 1052 * CHECK condition code will be recognized as end-of-data when 1053 * first read. 1054 * (I think this should be a by-product of fixed/variable..julian) 1055 */ 1056 switch (st->density) { 1057 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 1058 case QIC_11: 1059 case QIC_24: 1060 case QIC_120: 1061 case QIC_150: 1062 case QIC_525: 1063 case QIC_1320: 1064 case QIC_3095: 1065 case QIC_3220: 1066 st->flags &= ~ST_2FM_AT_EOD; 1067 break; 1068 default: 1069 st->flags |= ST_2FM_AT_EOD; 1070 } 1071 return (0); 1072 } 1073 1074 /* 1075 * Actually translate the requested transfer into 1076 * one the physical driver can understand 1077 * The transfer is described by a buf and will include 1078 * only one physical transfer. 1079 */ 1080 static void 1081 ststrategy(struct buf *bp) 1082 { 1083 struct st_softc *st = st_cd.cd_devs[STUNIT(bp->b_dev)]; 1084 int s; 1085 1086 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1087 ("ststrategy %d bytes @ blk %" PRId64 "\n", bp->b_bcount, bp->b_blkno)); 1088 /* 1089 * If it's a null transfer, return immediatly 1090 */ 1091 if (bp->b_bcount == 0) 1092 goto done; 1093 1094 /* If offset is negative, error */ 1095 if (bp->b_blkno < 0) { 1096 bp->b_error = EINVAL; 1097 goto bad; 1098 } 1099 1100 /* 1101 * Odd sized request on fixed drives are verboten 1102 */ 1103 if (st->flags & ST_FIXEDBLOCKS) { 1104 if (bp->b_bcount % st->blksize) { 1105 printf("%s: bad request, must be multiple of %d\n", 1106 st->sc_dev.dv_xname, st->blksize); 1107 bp->b_error = EIO; 1108 goto bad; 1109 } 1110 } 1111 /* 1112 * as are out-of-range requests on variable drives. 1113 */ 1114 else if (bp->b_bcount < st->blkmin || 1115 (st->blkmax && bp->b_bcount > st->blkmax)) { 1116 printf("%s: bad request, must be between %d and %d\n", 1117 st->sc_dev.dv_xname, st->blkmin, st->blkmax); 1118 bp->b_error = EIO; 1119 goto bad; 1120 } 1121 s = splbio(); 1122 1123 /* 1124 * Place it in the queue of activities for this tape 1125 * at the end (a bit silly because we only have on user.. 1126 * (but it could fork())) 1127 */ 1128 BUFQ_PUT(st->buf_queue, bp); 1129 1130 /* 1131 * Tell the device to get going on the transfer if it's 1132 * not doing anything, otherwise just wait for completion 1133 * (All a bit silly if we're only allowing 1 open but..) 1134 */ 1135 ststart(st->sc_periph); 1136 1137 splx(s); 1138 return; 1139 bad: 1140 bp->b_flags |= B_ERROR; 1141 done: 1142 /* 1143 * Correctly set the buf to indicate a completed xfer 1144 */ 1145 bp->b_resid = bp->b_bcount; 1146 biodone(bp); 1147 return; 1148 } 1149 1150 /* 1151 * ststart looks to see if there is a buf waiting for the device 1152 * and that the device is not already busy. If both are true, 1153 * It dequeues the buf and creates a scsi command to perform the 1154 * transfer required. The transfer request will call scsipi_done 1155 * on completion, which will in turn call this routine again 1156 * so that the next queued transfer is performed. 1157 * The bufs are queued by the strategy routine (ststrategy) 1158 * 1159 * This routine is also called after other non-queued requests 1160 * have been made of the scsi driver, to ensure that the queue 1161 * continues to be drained. 1162 * ststart() is called at splbio 1163 */ 1164 static void 1165 ststart(struct scsipi_periph *periph) 1166 { 1167 struct st_softc *st = (void *)periph->periph_dev; 1168 struct buf *bp; 1169 struct scsi_rw_tape cmd; 1170 struct scsipi_xfer *xs; 1171 int flags, error; 1172 1173 SC_DEBUG(periph, SCSIPI_DB2, ("ststart ")); 1174 /* 1175 * See if there is a buf to do and we are not already 1176 * doing one 1177 */ 1178 while (periph->periph_active < periph->periph_openings) { 1179 /* if a special awaits, let it proceed first */ 1180 if (periph->periph_flags & PERIPH_WAITING) { 1181 periph->periph_flags &= ~PERIPH_WAITING; 1182 wakeup((caddr_t)periph); 1183 return; 1184 } 1185 1186 /* 1187 * If the device has been unmounted by the user 1188 * then throw away all requests until done. 1189 */ 1190 if (__predict_false((st->flags & ST_MOUNTED) == 0 || 1191 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0)) { 1192 if ((bp = BUFQ_GET(st->buf_queue)) != NULL) { 1193 /* make sure that one implies the other.. */ 1194 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 1195 bp->b_flags |= B_ERROR; 1196 bp->b_error = EIO; 1197 bp->b_resid = bp->b_bcount; 1198 biodone(bp); 1199 continue; 1200 } else { 1201 return; 1202 } 1203 } 1204 1205 if ((bp = BUFQ_PEEK(st->buf_queue)) == NULL) 1206 return; 1207 1208 iostat_busy(st->stats); 1209 1210 /* 1211 * only FIXEDBLOCK devices have pending I/O or space operations. 1212 */ 1213 if (st->flags & ST_FIXEDBLOCKS) { 1214 /* 1215 * If we are at a filemark but have not reported it yet 1216 * then we should report it now 1217 */ 1218 if (st->flags & ST_AT_FILEMARK) { 1219 if ((bp->b_flags & B_READ) == B_WRITE) { 1220 /* 1221 * Handling of ST_AT_FILEMARK in 1222 * st_space will fill in the right file 1223 * mark count. 1224 * Back up over filemark 1225 */ 1226 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1227 BUFQ_GET(st->buf_queue); 1228 bp->b_flags |= B_ERROR; 1229 bp->b_error = EIO; 1230 biodone(bp); 1231 continue; 1232 } 1233 } else { 1234 BUFQ_GET(st->buf_queue); 1235 bp->b_resid = bp->b_bcount; 1236 bp->b_error = 0; 1237 bp->b_flags &= ~B_ERROR; 1238 st->flags &= ~ST_AT_FILEMARK; 1239 biodone(bp); 1240 continue; /* seek more work */ 1241 } 1242 } 1243 } 1244 /* 1245 * If we are at EOM but have not reported it 1246 * yet then we should report it now. 1247 */ 1248 if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { 1249 BUFQ_GET(st->buf_queue); 1250 bp->b_resid = bp->b_bcount; 1251 if (st->flags & ST_EIO_PENDING) { 1252 bp->b_error = EIO; 1253 bp->b_flags |= B_ERROR; 1254 } 1255 st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); 1256 biodone(bp); 1257 continue; /* seek more work */ 1258 } 1259 1260 /* 1261 * Fill out the scsi command 1262 */ 1263 memset(&cmd, 0, sizeof(cmd)); 1264 flags = XS_CTL_NOSLEEP | XS_CTL_ASYNC; 1265 if ((bp->b_flags & B_READ) == B_WRITE) { 1266 cmd.opcode = WRITE; 1267 st->flags &= ~ST_FM_WRITTEN; 1268 flags |= XS_CTL_DATA_OUT; 1269 } else { 1270 cmd.opcode = READ; 1271 flags |= XS_CTL_DATA_IN; 1272 } 1273 1274 /* 1275 * Handle "fixed-block-mode" tape drives by using the 1276 * block count instead of the length. 1277 */ 1278 if (st->flags & ST_FIXEDBLOCKS) { 1279 cmd.byte2 |= SRW_FIXED; 1280 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1281 } else 1282 _lto3b(bp->b_bcount, cmd.len); 1283 1284 /* 1285 * Clear 'position updated' indicator 1286 */ 1287 st->flags &= ~ST_POSUPDATED; 1288 1289 /* 1290 * go ask the adapter to do all this for us 1291 */ 1292 xs = scsipi_make_xs(periph, 1293 (struct scsipi_generic *)&cmd, sizeof(cmd), 1294 (u_char *)bp->b_data, bp->b_bcount, 1295 0, ST_IO_TIME, bp, flags); 1296 if (__predict_false(xs == NULL)) { 1297 /* 1298 * out of memory. Keep this buffer in the queue, and 1299 * retry later. 1300 */ 1301 callout_reset(&st->sc_callout, hz / 2, strestart, 1302 periph); 1303 return; 1304 } 1305 /* 1306 * need to dequeue the buffer before queuing the command, 1307 * because cdstart may be called recursively from the 1308 * HBA driver 1309 */ 1310 #ifdef DIAGNOSTIC 1311 if (BUFQ_GET(st->buf_queue) != bp) 1312 panic("ststart(): dequeued wrong buf"); 1313 #else 1314 BUFQ_GET(st->buf_queue); 1315 #endif 1316 error = scsipi_execute_xs(xs); 1317 /* with a scsipi_xfer preallocated, scsipi_command can't fail */ 1318 KASSERT(error == 0); 1319 } /* go back and see if we can cram more work in.. */ 1320 } 1321 1322 static void 1323 strestart(void *v) 1324 { 1325 int s = splbio(); 1326 ststart((struct scsipi_periph *)v); 1327 splx(s); 1328 } 1329 1330 1331 static void 1332 stdone(struct scsipi_xfer *xs, int error) 1333 { 1334 struct st_softc *st = (void *)xs->xs_periph->periph_dev; 1335 struct buf *bp = xs->bp; 1336 1337 if (bp) { 1338 bp->b_error = error; 1339 bp->b_resid = xs->resid; 1340 if (error) 1341 bp->b_flags |= B_ERROR; 1342 1343 if ((bp->b_flags & B_READ) == B_WRITE) 1344 st->flags |= ST_WRITTEN; 1345 else 1346 st->flags &= ~ST_WRITTEN; 1347 1348 iostat_unbusy(st->stats, bp->b_bcount, 1349 ((bp->b_flags & B_READ) == B_READ)); 1350 1351 #if NRND > 0 1352 rnd_add_uint32(&st->rnd_source, bp->b_blkno); 1353 #endif 1354 1355 if ((st->flags & ST_POSUPDATED) == 0) { 1356 if (error) { 1357 st->fileno = st->blkno = -1; 1358 } else if (st->blkno != -1) { 1359 if (st->flags & ST_FIXEDBLOCKS) 1360 st->blkno += 1361 (bp->b_bcount / st->blksize); 1362 else 1363 st->blkno++; 1364 } 1365 } 1366 1367 biodone(bp); 1368 } 1369 } 1370 1371 static int 1372 stread(dev_t dev, struct uio *uio, int iomode) 1373 { 1374 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1375 1376 return (physio(ststrategy, NULL, dev, B_READ, 1377 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1378 } 1379 1380 static int 1381 stwrite(dev_t dev, struct uio *uio, int iomode) 1382 { 1383 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1384 1385 return (physio(ststrategy, NULL, dev, B_WRITE, 1386 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1387 } 1388 1389 /* 1390 * Perform special action on behalf of the user; 1391 * knows about the internals of this device 1392 */ 1393 static int 1394 stioctl(dev_t dev, u_long cmd, caddr_t arg, int flag, struct lwp *l) 1395 { 1396 int error = 0; 1397 int unit; 1398 int number, nmarks, dsty; 1399 int flags; 1400 struct st_softc *st; 1401 int hold_blksize; 1402 u_int8_t hold_density; 1403 struct mtop *mt = (struct mtop *) arg; 1404 1405 /* 1406 * Find the device that the user is talking about 1407 */ 1408 flags = 0; /* give error messages, act on errors etc. */ 1409 unit = STUNIT(dev); 1410 dsty = STDSTY(dev); 1411 st = st_cd.cd_devs[unit]; 1412 hold_blksize = st->blksize; 1413 hold_density = st->density; 1414 1415 switch ((u_int) cmd) { 1416 1417 case MTIOCGET: { 1418 struct mtget *g = (struct mtget *) arg; 1419 /* 1420 * (to get the current state of READONLY) 1421 */ 1422 error = st->ops(st, ST_OPS_MODESENSE, XS_CTL_SILENT); 1423 if (error) { 1424 /* 1425 * Ignore the error if in control mode; 1426 * this is mandated by st(4). 1427 */ 1428 if (STMODE(dev) != CTRL_MODE) 1429 break; 1430 error = 0; 1431 } 1432 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("[ioctl: get status]\n")); 1433 memset(g, 0, sizeof(struct mtget)); 1434 g->mt_type = 0x7; /* Ultrix compat *//*? */ 1435 g->mt_blksiz = st->blksize; 1436 g->mt_density = st->density; 1437 g->mt_mblksiz[0] = st->modes[0].blksize; 1438 g->mt_mblksiz[1] = st->modes[1].blksize; 1439 g->mt_mblksiz[2] = st->modes[2].blksize; 1440 g->mt_mblksiz[3] = st->modes[3].blksize; 1441 g->mt_mdensity[0] = st->modes[0].density; 1442 g->mt_mdensity[1] = st->modes[1].density; 1443 g->mt_mdensity[2] = st->modes[2].density; 1444 g->mt_mdensity[3] = st->modes[3].density; 1445 g->mt_fileno = st->fileno; 1446 g->mt_blkno = st->blkno; 1447 if (st->flags & ST_READONLY) 1448 g->mt_dsreg |= MT_DS_RDONLY; 1449 if (st->flags & ST_MOUNTED) 1450 g->mt_dsreg |= MT_DS_MOUNTED; 1451 g->mt_resid = st->mt_resid; 1452 g->mt_erreg = st->mt_erreg; 1453 /* 1454 * clear latched errors. 1455 */ 1456 st->mt_resid = 0; 1457 st->mt_erreg = 0; 1458 st->asc = 0; 1459 st->ascq = 0; 1460 break; 1461 } 1462 case MTIOCTOP: { 1463 1464 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1465 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1466 mt->mt_count)); 1467 1468 /* compat: in U*x it is a short */ 1469 number = mt->mt_count; 1470 switch ((short) (mt->mt_op)) { 1471 case MTWEOF: /* write an end-of-file record */ 1472 error = st_write_filemarks(st, number, flags); 1473 break; 1474 case MTBSF: /* backward space file */ 1475 number = -number; 1476 case MTFSF: /* forward space file */ 1477 error = st_check_eod(st, FALSE, &nmarks, flags); 1478 if (!error) 1479 error = st_space(st, number - nmarks, 1480 SP_FILEMARKS, flags); 1481 break; 1482 case MTBSR: /* backward space record */ 1483 number = -number; 1484 case MTFSR: /* forward space record */ 1485 error = st_check_eod(st, TRUE, &nmarks, flags); 1486 if (!error) 1487 error = st_space(st, number, SP_BLKS, flags); 1488 break; 1489 case MTREW: /* rewind */ 1490 error = st_rewind(st, 0, flags); 1491 break; 1492 case MTOFFL: /* rewind and put the drive offline */ 1493 st_unmount(st, EJECT); 1494 break; 1495 case MTNOP: /* no operation, sets status only */ 1496 break; 1497 case MTRETEN: /* retension the tape */ 1498 error = st_load(st, LD_RETENSION, flags); 1499 if (!error) 1500 error = st_load(st, LD_LOAD, flags); 1501 break; 1502 case MTEOM: /* forward space to end of media */ 1503 error = st_check_eod(st, FALSE, &nmarks, flags); 1504 if (!error) 1505 error = st_space(st, 1, SP_EOM, flags); 1506 break; 1507 case MTCACHE: /* enable controller cache */ 1508 st->flags &= ~ST_DONTBUFFER; 1509 goto try_new_value; 1510 case MTNOCACHE: /* disable controller cache */ 1511 st->flags |= ST_DONTBUFFER; 1512 goto try_new_value; 1513 case MTERASE: /* erase volume */ 1514 error = st_erase(st, number, flags); 1515 break; 1516 case MTSETBSIZ: /* Set block size for device */ 1517 #ifdef NOTYET 1518 if (!(st->flags & ST_NEW_MOUNT)) { 1519 uprintf("re-mount tape before changing blocksize"); 1520 error = EINVAL; 1521 break; 1522 } 1523 #endif 1524 if (number == 0) 1525 st->flags &= ~ST_FIXEDBLOCKS; 1526 else { 1527 if ((st->blkmin || st->blkmax) && 1528 (number < st->blkmin || 1529 number > st->blkmax)) { 1530 error = EINVAL; 1531 break; 1532 } 1533 st->flags |= ST_FIXEDBLOCKS; 1534 } 1535 st->blksize = number; 1536 st->flags |= ST_BLOCK_SET; /*XXX */ 1537 goto try_new_value; 1538 1539 case MTSETDNSTY: /* Set density for device and mode */ 1540 /* 1541 * Any number >= 0 and <= 0xff is legal. Numbers 1542 * above 0x80 are 'vendor unique'. 1543 */ 1544 if (number < 0 || number > 255) { 1545 error = EINVAL; 1546 break; 1547 } else 1548 st->density = number; 1549 goto try_new_value; 1550 1551 case MTCMPRESS: 1552 error = st->ops(st, (number == 0) ? 1553 ST_OPS_CMPRSS_OFF : ST_OPS_CMPRSS_ON, 1554 XS_CTL_SILENT); 1555 break; 1556 1557 case MTEWARN: 1558 if (number) 1559 st->flags |= ST_EARLYWARN; 1560 else 1561 st->flags &= ~ST_EARLYWARN; 1562 break; 1563 1564 default: 1565 error = EINVAL; 1566 } 1567 break; 1568 } 1569 case MTIOCIEOT: 1570 case MTIOCEEOT: 1571 break; 1572 1573 case MTIOCRDSPOS: 1574 error = st_rdpos(st, 0, (u_int32_t *) arg); 1575 break; 1576 1577 case MTIOCRDHPOS: 1578 error = st_rdpos(st, 1, (u_int32_t *) arg); 1579 break; 1580 1581 case MTIOCSLOCATE: 1582 error = st_setpos(st, 0, (u_int32_t *) arg); 1583 break; 1584 1585 case MTIOCHLOCATE: 1586 error = st_setpos(st, 1, (u_int32_t *) arg); 1587 break; 1588 1589 1590 default: 1591 error = scsipi_do_ioctl(st->sc_periph, dev, cmd, arg, 1592 flag, l); 1593 break; 1594 } 1595 return (error); 1596 /*-----------------------------*/ 1597 try_new_value: 1598 /* 1599 * Check that the mode being asked for is aggreeable to the 1600 * drive. If not, put it back the way it was. 1601 * 1602 * If in control mode, we can make (persistent) mode changes 1603 * even if no medium is loaded (see st(4)). 1604 */ 1605 if ((STMODE(dev) != CTRL_MODE || (st->flags & ST_MOUNTED) != 0) && 1606 (error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 1607 /* put it back as it was */ 1608 printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); 1609 st->density = hold_density; 1610 st->blksize = hold_blksize; 1611 if (st->blksize) 1612 st->flags |= ST_FIXEDBLOCKS; 1613 else 1614 st->flags &= ~ST_FIXEDBLOCKS; 1615 return (error); 1616 } 1617 /* 1618 * As the drive liked it, if we are setting a new default, 1619 * set it into the structures as such. 1620 * 1621 * The means for deciding this are not finalised yet- but 1622 * if the device was opened in Control Mode, the values 1623 * are persistent now across mounts. 1624 */ 1625 if (STMODE(dev) == CTRL_MODE) { 1626 switch ((short) (mt->mt_op)) { 1627 case MTSETBSIZ: 1628 st->modes[dsty].blksize = st->blksize; 1629 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1630 break; 1631 case MTSETDNSTY: 1632 st->modes[dsty].density = st->density; 1633 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1634 break; 1635 } 1636 } 1637 return (0); 1638 } 1639 1640 /* 1641 * Do a synchronous read. 1642 */ 1643 static int 1644 st_read(struct st_softc *st, char *bf, int size, int flags) 1645 { 1646 struct scsi_rw_tape cmd; 1647 1648 /* 1649 * If it's a null transfer, return immediatly 1650 */ 1651 if (size == 0) 1652 return (0); 1653 memset(&cmd, 0, sizeof(cmd)); 1654 cmd.opcode = READ; 1655 if (st->flags & ST_FIXEDBLOCKS) { 1656 cmd.byte2 |= SRW_FIXED; 1657 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1658 cmd.len); 1659 } else 1660 _lto3b(size, cmd.len); 1661 return (scsipi_command(st->sc_periph, 1662 (void *)&cmd, sizeof(cmd), (void *)bf, size, 0, ST_IO_TIME, NULL, 1663 flags | XS_CTL_DATA_IN)); 1664 } 1665 1666 /* 1667 * issue an erase command 1668 */ 1669 static int 1670 st_erase(struct st_softc *st, int full, int flags) 1671 { 1672 int tmo; 1673 struct scsi_erase cmd; 1674 1675 /* 1676 * Full erase means set LONG bit in erase command, which asks 1677 * the drive to erase the entire unit. Without this bit, we're 1678 * asking the drive to write an erase gap. 1679 */ 1680 memset(&cmd, 0, sizeof(cmd)); 1681 cmd.opcode = ERASE; 1682 if (full) { 1683 cmd.byte2 = SE_LONG; 1684 tmo = ST_SPC_TIME; 1685 } else { 1686 tmo = ST_IO_TIME; 1687 } 1688 1689 /* 1690 * XXX We always do this asynchronously, for now, unless the device 1691 * has the ST_Q_ERASE_NOIMM quirk. How long should we wait if we 1692 * want to (eventually) to it synchronously? 1693 */ 1694 if ((st->quirks & ST_Q_ERASE_NOIMM) == 0) 1695 cmd.byte2 |= SE_IMMED; 1696 1697 return (scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1698 ST_RETRIES, tmo, NULL, flags)); 1699 } 1700 1701 /* 1702 * skip N blocks/filemarks/seq filemarks/eom 1703 */ 1704 static int 1705 st_space(struct st_softc *st, int number, u_int what, int flags) 1706 { 1707 struct scsi_space cmd; 1708 int error; 1709 1710 switch (what) { 1711 case SP_BLKS: 1712 if (st->flags & ST_PER_ACTION) { 1713 if (number > 0) { 1714 st->flags &= ~ST_PER_ACTION; 1715 return (EIO); 1716 } else if (number < 0) { 1717 if (st->flags & ST_AT_FILEMARK) { 1718 /* 1719 * Handling of ST_AT_FILEMARK 1720 * in st_space will fill in the 1721 * right file mark count. 1722 */ 1723 error = st_space(st, 0, SP_FILEMARKS, 1724 flags); 1725 if (error) 1726 return (error); 1727 } 1728 if (st->flags & ST_BLANK_READ) { 1729 st->flags &= ~ST_BLANK_READ; 1730 return (EIO); 1731 } 1732 st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); 1733 } 1734 } 1735 break; 1736 case SP_FILEMARKS: 1737 if (st->flags & ST_EIO_PENDING) { 1738 if (number > 0) { 1739 /* pretend we just discovered the error */ 1740 st->flags &= ~ST_EIO_PENDING; 1741 return (EIO); 1742 } else if (number < 0) { 1743 /* back away from the error */ 1744 st->flags &= ~ST_EIO_PENDING; 1745 } 1746 } 1747 if (st->flags & ST_AT_FILEMARK) { 1748 st->flags &= ~ST_AT_FILEMARK; 1749 number--; 1750 } 1751 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 1752 /* back away from unwritten tape */ 1753 st->flags &= ~ST_BLANK_READ; 1754 number++; /* XXX dubious */ 1755 } 1756 break; 1757 case SP_EOM: 1758 if (st->flags & ST_EOM_PENDING) { 1759 /* we're already there */ 1760 st->flags &= ~ST_EOM_PENDING; 1761 return (0); 1762 } 1763 if (st->flags & ST_EIO_PENDING) { 1764 /* pretend we just discovered the error */ 1765 st->flags &= ~ST_EIO_PENDING; 1766 return (EIO); 1767 } 1768 if (st->flags & ST_AT_FILEMARK) 1769 st->flags &= ~ST_AT_FILEMARK; 1770 break; 1771 } 1772 if (number == 0) 1773 return (0); 1774 1775 memset(&cmd, 0, sizeof(cmd)); 1776 cmd.opcode = SPACE; 1777 cmd.byte2 = what; 1778 _lto3b(number, cmd.number); 1779 1780 st->flags &= ~ST_POSUPDATED; 1781 st->last_ctl_resid = 0; 1782 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1783 0, ST_SPC_TIME, NULL, flags); 1784 1785 if (error == 0 && (st->flags & ST_POSUPDATED) == 0) { 1786 number = number - st->last_ctl_resid; 1787 if (what == SP_BLKS) { 1788 if (st->blkno != -1) { 1789 st->blkno += number; 1790 } 1791 } else if (what == SP_FILEMARKS) { 1792 if (st->fileno != -1) { 1793 st->fileno += number; 1794 if (number > 0) { 1795 st->blkno = 0; 1796 } else if (number < 0) { 1797 st->blkno = -1; 1798 } 1799 } 1800 } else if (what == SP_EOM) { 1801 /* 1802 * This loses us relative position. 1803 */ 1804 st->fileno = st->blkno = -1; 1805 } 1806 } 1807 return (error); 1808 } 1809 1810 /* 1811 * write N filemarks 1812 */ 1813 static int 1814 st_write_filemarks(struct st_softc *st, int number, int flags) 1815 { 1816 int error; 1817 struct scsi_write_filemarks cmd; 1818 1819 /* 1820 * It's hard to write a negative number of file marks. 1821 * Don't try. 1822 */ 1823 if (number < 0) 1824 return (EINVAL); 1825 switch (number) { 1826 case 0: /* really a command to sync the drive's buffers */ 1827 break; 1828 case 1: 1829 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 1830 st->flags &= ~ST_WRITTEN; 1831 else 1832 st->flags |= ST_FM_WRITTEN; 1833 st->flags &= ~ST_PER_ACTION; 1834 break; 1835 default: 1836 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 1837 } 1838 1839 memset(&cmd, 0, sizeof(cmd)); 1840 cmd.opcode = WRITE_FILEMARKS; 1841 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1842 cmd.byte2 = SR_IMMED; 1843 /* 1844 * The ATAPI Onstream DI-30 doesn't support writing filemarks, but 1845 * WRITE_FILEMARKS is still used to flush the buffer 1846 */ 1847 if ((st->quirks & ST_Q_NOFILEMARKS) == 0) 1848 _lto3b(number, cmd.number); 1849 1850 /* XXX WE NEED TO BE ABLE TO GET A RESIDIUAL XXX */ 1851 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1852 0, ST_IO_TIME * 4, NULL, flags); 1853 if (error == 0 && st->fileno != -1) { 1854 st->fileno += number; 1855 } 1856 return (error); 1857 } 1858 1859 /* 1860 * Make sure the right number of file marks is on tape if the 1861 * tape has been written. If the position argument is true, 1862 * leave the tape positioned where it was originally. 1863 * 1864 * nmarks returns the number of marks to skip (or, if position 1865 * true, which were skipped) to get back original position. 1866 */ 1867 static int 1868 st_check_eod(struct st_softc *st, boolean position, int *nmarks, int flags) 1869 { 1870 int error; 1871 1872 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 1873 default: 1874 *nmarks = 0; 1875 return (0); 1876 case ST_WRITTEN: 1877 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 1878 *nmarks = 1; 1879 break; 1880 case ST_WRITTEN | ST_2FM_AT_EOD: 1881 *nmarks = 2; 1882 } 1883 error = st_write_filemarks(st, *nmarks, flags); 1884 if (position && !error) 1885 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 1886 return (error); 1887 } 1888 1889 /* 1890 * load/unload/retension 1891 */ 1892 static int 1893 st_load(struct st_softc *st, u_int type, int flags) 1894 { 1895 int error; 1896 struct scsi_load cmd; 1897 1898 if (type != LD_LOAD) { 1899 int nmarks; 1900 1901 error = st_check_eod(st, FALSE, &nmarks, flags); 1902 if (error) { 1903 printf("%s: failed to write closing filemarks at " 1904 "unload, errno=%d\n", st->sc_dev.dv_xname, error); 1905 return (error); 1906 } 1907 } 1908 if (st->quirks & ST_Q_IGNORE_LOADS) { 1909 if (type == LD_LOAD) { 1910 /* 1911 * If we ignore loads, at least we should try a rewind. 1912 */ 1913 return st_rewind(st, 0, flags); 1914 } 1915 /* otherwise, we should do what's asked of us */ 1916 } 1917 1918 memset(&cmd, 0, sizeof(cmd)); 1919 cmd.opcode = LOAD; 1920 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1921 cmd.byte2 = SR_IMMED; 1922 cmd.how = type; 1923 1924 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1925 ST_RETRIES, ST_SPC_TIME, NULL, flags); 1926 if (error) { 1927 printf("%s: error %d in st_load (op %d)\n", 1928 st->sc_dev.dv_xname, error, type); 1929 } 1930 return (error); 1931 } 1932 1933 /* 1934 * Rewind the device 1935 */ 1936 static int 1937 st_rewind(struct st_softc *st, u_int immediate, int flags) 1938 { 1939 struct scsi_rewind cmd; 1940 int error; 1941 int nmarks; 1942 1943 error = st_check_eod(st, FALSE, &nmarks, flags); 1944 if (error) { 1945 printf("%s: failed to write closing filemarks at " 1946 "rewind, errno=%d\n", st->sc_dev.dv_xname, error); 1947 return (error); 1948 } 1949 st->flags &= ~ST_PER_ACTION; 1950 1951 /* 1952 * ATAPI tapes always need immediate to be set 1953 */ 1954 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1955 immediate = SR_IMMED; 1956 1957 memset(&cmd, 0, sizeof(cmd)); 1958 cmd.opcode = REWIND; 1959 cmd.byte2 = immediate; 1960 1961 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1962 ST_RETRIES, immediate ? ST_CTL_TIME: ST_SPC_TIME, NULL, flags); 1963 if (error) { 1964 printf("%s: error %d trying to rewind\n", 1965 st->sc_dev.dv_xname, error); 1966 /* lost position */ 1967 st->fileno = st->blkno = -1; 1968 } else { 1969 st->fileno = st->blkno = 0; 1970 } 1971 return (error); 1972 } 1973 1974 static int 1975 st_rdpos(struct st_softc *st, int hard, u_int32_t *blkptr) 1976 { 1977 int error; 1978 u_int8_t posdata[20]; 1979 struct scsi_tape_read_position cmd; 1980 1981 /* 1982 * We try and flush any buffered writes here if we were writing 1983 * and we're trying to get hardware block position. It eats 1984 * up performance substantially, but I'm wary of drive firmware. 1985 * 1986 * I think that *logical* block position is probably okay- 1987 * but hardware block position might have to wait for data 1988 * to hit media to be valid. Caveat Emptor. 1989 */ 1990 1991 if (hard && (st->flags & ST_WRITTEN)) { 1992 /* 1993 * First flush any pending writes... 1994 */ 1995 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 1996 /* 1997 * The latter case is for 'write protected' tapes 1998 * which are too stupid to recognize a zero count 1999 * for writing filemarks as a no-op. 2000 */ 2001 if (error != 0 && error != EACCES && error != EROFS) 2002 return (error); 2003 } 2004 2005 memset(&cmd, 0, sizeof(cmd)); 2006 memset(&posdata, 0, sizeof(posdata)); 2007 cmd.opcode = READ_POSITION; 2008 if (hard) 2009 cmd.byte1 = 1; 2010 2011 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 2012 (void *)&posdata, sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, 2013 XS_CTL_SILENT | XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); 2014 2015 if (error == 0) { 2016 #if 0 2017 printf("posdata:"); 2018 for (hard = 0; hard < sizeof(posdata); hard++) 2019 printf("%02x ", posdata[hard] & 0xff); 2020 printf("\n"); 2021 #endif 2022 if (posdata[0] & 0x4) /* Block Position Unknown */ 2023 error = EINVAL; 2024 else 2025 *blkptr = _4btol(&posdata[4]); 2026 } 2027 return (error); 2028 } 2029 2030 static int 2031 st_setpos(struct st_softc *st, int hard, u_int32_t *blkptr) 2032 { 2033 int error; 2034 struct scsi_tape_locate cmd; 2035 2036 /* 2037 * We used to try and flush any buffered writes here. 2038 * Now we push this onto user applications to either 2039 * flush the pending writes themselves (via a zero count 2040 * WRITE FILEMARKS command) or they can trust their tape 2041 * drive to do this correctly for them. 2042 * 2043 * There are very ugly performance limitations otherwise. 2044 */ 2045 2046 memset(&cmd, 0, sizeof(cmd)); 2047 cmd.opcode = LOCATE; 2048 if (hard) 2049 cmd.byte2 = 1 << 2; 2050 _lto4b(*blkptr, cmd.blkaddr); 2051 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 2052 ST_RETRIES, ST_SPC_TIME, NULL, 0); 2053 /* 2054 * Note file && block number position now unknown (if 2055 * these things ever start being maintained in this driver) 2056 */ 2057 st->fileno = st->blkno = -1; 2058 return (error); 2059 } 2060 2061 2062 /* 2063 * Look at the returned sense and act on the error and determine 2064 * the unix error number to pass back..., 0 (== report no error), 2065 * -1 = retry the operation, -2 continue error processing. 2066 */ 2067 static int 2068 st_interpret_sense(struct scsipi_xfer *xs) 2069 { 2070 struct scsipi_periph *periph = xs->xs_periph; 2071 struct scsi_sense_data *sense = &xs->sense.scsi_sense; 2072 struct buf *bp = xs->bp; 2073 struct st_softc *st = (void *)periph->periph_dev; 2074 int retval = EJUSTRETURN; 2075 int doprint = ((xs->xs_control & XS_CTL_SILENT) == 0); 2076 u_int8_t key; 2077 int32_t info; 2078 2079 /* 2080 * If it isn't a extended or extended/deferred error, let 2081 * the generic code handle it. 2082 */ 2083 if (SSD_RCODE(sense->response_code) != SSD_RCODE_CURRENT && 2084 SSD_RCODE(sense->response_code) != SSD_RCODE_DEFERRED) 2085 return (retval); 2086 2087 if (sense->response_code & SSD_RCODE_VALID) 2088 info = _4btol(sense->info); 2089 else 2090 info = (st->flags & ST_FIXEDBLOCKS) ? 2091 xs->datalen / st->blksize : xs->datalen; 2092 key = SSD_SENSE_KEY(sense->flags); 2093 st->mt_erreg = key; 2094 st->asc = sense->asc; 2095 st->ascq = sense->ascq; 2096 st->mt_resid = (short) info; 2097 2098 if (key == SKEY_NOT_READY && st->asc == 0x4 && st->ascq == 0x1) { 2099 /* Not Ready, Logical Unit Is in Process Of Becoming Ready */ 2100 if (!callout_pending(&periph->periph_callout)) 2101 scsipi_periph_freeze(periph, 1); 2102 callout_reset(&periph->periph_callout, 2103 hz, scsipi_periph_timed_thaw, periph); 2104 return (ERESTART); 2105 } 2106 2107 /* 2108 * If the device is not open yet, let generic handle 2109 */ 2110 if ((periph->periph_flags & PERIPH_OPEN) == 0) { 2111 return (retval); 2112 } 2113 2114 xs->resid = info; 2115 if (st->flags & ST_FIXEDBLOCKS) { 2116 if (bp) { 2117 xs->resid *= st->blksize; 2118 st->last_io_resid = xs->resid; 2119 } else { 2120 st->last_ctl_resid = xs->resid; 2121 } 2122 if (key == SKEY_VOLUME_OVERFLOW) { 2123 st->flags |= ST_EIO_PENDING; 2124 if (bp) 2125 bp->b_resid = xs->resid; 2126 } else if (sense->flags & SSD_EOM) { 2127 if ((st->flags & ST_EARLYWARN) == 0) 2128 st->flags |= ST_EIO_PENDING; 2129 st->flags |= ST_EOM_PENDING; 2130 if (bp) { 2131 #if 0 2132 bp->b_resid = xs->resid; 2133 #else 2134 /* 2135 * Grotesque as it seems, the few times 2136 * I've actually seen a non-zero resid, 2137 * the tape drive actually lied and had 2138 * written all the data! 2139 */ 2140 bp->b_resid = 0; 2141 #endif 2142 } 2143 } 2144 if (sense->flags & SSD_FILEMARK) { 2145 st->flags |= ST_AT_FILEMARK; 2146 if (bp) 2147 bp->b_resid = xs->resid; 2148 if (st->fileno != (daddr_t) -1) { 2149 st->fileno++; 2150 st->blkno = 0; 2151 st->flags |= ST_POSUPDATED; 2152 } 2153 } 2154 if (sense->flags & SSD_ILI) { 2155 st->flags |= ST_EIO_PENDING; 2156 if (bp) 2157 bp->b_resid = xs->resid; 2158 if (sense->response_code & SSD_RCODE_VALID && 2159 (xs->xs_control & XS_CTL_SILENT) == 0) 2160 printf("%s: block wrong size, %d blocks " 2161 "residual\n", st->sc_dev.dv_xname, info); 2162 2163 /* 2164 * This quirk code helps the drive read 2165 * the first tape block, regardless of 2166 * format. That is required for these 2167 * drives to return proper MODE SENSE 2168 * information. 2169 */ 2170 if ((st->quirks & ST_Q_SENSE_HELP) && 2171 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 2172 st->blksize -= 512; 2173 else if ((st->flags & ST_POSUPDATED) == 0) { 2174 if (st->blkno != (daddr_t) -1) { 2175 st->blkno += 2176 (xs->datalen / st->blksize); 2177 st->flags |= ST_POSUPDATED; 2178 } 2179 } 2180 } 2181 /* 2182 * If data wanted and no data was transferred, do it immediately 2183 */ 2184 if (xs->datalen && xs->resid >= xs->datalen) { 2185 if (st->flags & ST_EIO_PENDING) 2186 return (EIO); 2187 if (st->flags & ST_AT_FILEMARK) { 2188 if (bp) 2189 bp->b_resid = xs->resid; 2190 return (0); 2191 } 2192 } 2193 } else { /* must be variable mode */ 2194 if (bp) { 2195 st->last_io_resid = xs->resid; 2196 } else { 2197 st->last_ctl_resid = xs->resid; 2198 } 2199 if (sense->flags & SSD_EOM) { 2200 /* 2201 * The current semantics of this 2202 * driver requires EOM detection 2203 * to return EIO unless early 2204 * warning detection is enabled 2205 * for variable mode (this is always 2206 * on for fixed block mode). 2207 */ 2208 if (st->flags & ST_EARLYWARN) { 2209 st->flags |= ST_EOM_PENDING; 2210 retval = 0; 2211 } else { 2212 retval = EIO; 2213 } 2214 2215 /* 2216 * If it's an unadorned EOM detection, 2217 * suppress printing an error. 2218 */ 2219 if (key == SKEY_NO_SENSE) { 2220 doprint = 0; 2221 } 2222 } else if (sense->flags & SSD_FILEMARK) { 2223 retval = 0; 2224 if (st->fileno != (daddr_t) -1) { 2225 st->fileno++; 2226 st->blkno = 0; 2227 st->flags |= ST_POSUPDATED; 2228 } 2229 } else if (sense->flags & SSD_ILI) { 2230 if (info < 0) { 2231 /* 2232 * The tape record was bigger than the read 2233 * we issued. 2234 */ 2235 if ((xs->xs_control & XS_CTL_SILENT) == 0) { 2236 printf("%s: %d-byte tape record too big" 2237 " for %d-byte user buffer\n", 2238 st->sc_dev.dv_xname, 2239 xs->datalen - info, xs->datalen); 2240 } 2241 retval = EIO; 2242 } else { 2243 retval = 0; 2244 if (st->blkno != (daddr_t) -1) { 2245 st->blkno++; 2246 st->flags |= ST_POSUPDATED; 2247 } 2248 } 2249 } 2250 if (bp) 2251 bp->b_resid = info; 2252 } 2253 2254 #ifndef SCSIPI_DEBUG 2255 if (retval == 0 && key == SKEY_NO_SENSE) 2256 doprint = 0; 2257 #endif 2258 if (key == SKEY_BLANK_CHECK) { 2259 /* 2260 * This quirk code helps the drive read the 2261 * first tape block, regardless of format. That 2262 * is required for these drives to return proper 2263 * MODE SENSE information. 2264 */ 2265 if ((st->quirks & ST_Q_SENSE_HELP) && 2266 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 2267 /* still starting */ 2268 st->blksize -= 512; 2269 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 2270 st->flags |= ST_BLANK_READ; 2271 xs->resid = xs->datalen; 2272 if (bp) { 2273 bp->b_resid = xs->resid; 2274 /* return an EOF */ 2275 } 2276 retval = 0; 2277 /* lost position */ 2278 st->fileno = st->blkno = -1; 2279 } 2280 } 2281 2282 /* 2283 * If generic sense processing will continue, we should not 2284 * print sense info here. 2285 */ 2286 if (retval == EJUSTRETURN) 2287 doprint = 0; 2288 2289 if (doprint) { 2290 #ifdef SCSIVERBOSE 2291 scsipi_print_sense(xs, 0); 2292 #else 2293 scsipi_printaddr(periph); 2294 printf("Sense Key 0x%02x", key); 2295 if ((sense->response_code & SSD_RCODE_VALID) != 0) { 2296 switch (key) { 2297 case SKEY_NOT_READY: 2298 case SKEY_ILLEGAL_REQUEST: 2299 case SKEY_UNIT_ATTENTION: 2300 case SKEY_DATA_PROTECT: 2301 break; 2302 case SKEY_VOLUME_OVERFLOW: 2303 case SKEY_BLANK_CHECK: 2304 printf(", requested size: %d (decimal)", info); 2305 break; 2306 case SKEY_ABORTED_COMMAND: 2307 if (xs->xs_retries) 2308 printf(", retrying"); 2309 printf(", cmd 0x%x, info 0x%x", 2310 xs->cmd->opcode, info); 2311 break; 2312 default: 2313 printf(", info = %d (decimal)", info); 2314 } 2315 } 2316 if (sense->extra_len != 0) { 2317 int n; 2318 printf(", data ="); 2319 for (n = 0; n < sense->extra_len; n++) 2320 printf(" %02x", sense->csi[n]); 2321 } 2322 printf("\n"); 2323 #endif 2324 } 2325 return (retval); 2326 } 2327 2328 /* 2329 * The quirk here is that the drive returns some value to st_mode_sense 2330 * incorrectly until the tape has actually passed by the head. 2331 * 2332 * The method is to set the drive to large fixed-block state (user-specified 2333 * density and 1024-byte blocks), then read and rewind to get it to sense the 2334 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 2335 * work, as a last resort, try variable- length blocks. The result will be 2336 * the ability to do an accurate st_mode_sense. 2337 * 2338 * We know we can do a rewind because we just did a load, which implies rewind. 2339 * Rewind seems preferable to space backward if we have a virgin tape. 2340 * 2341 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 2342 * error processing, both part of st_interpret_sense. 2343 */ 2344 static int 2345 st_touch_tape(struct st_softc *st) 2346 { 2347 char *bf; 2348 int readsize; 2349 int error; 2350 2351 bf = malloc(1024, M_TEMP, M_NOWAIT); 2352 if (bf == NULL) 2353 return (ENOMEM); 2354 2355 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 2356 goto bad; 2357 2358 /* 2359 * If the block size is already known from the 2360 * sense data, use it. Else start probing at 1024. 2361 */ 2362 if (st->media_blksize > 0) 2363 st->blksize = st->media_blksize; 2364 else 2365 st->blksize = 1024; 2366 2367 do { 2368 switch (st->blksize) { 2369 case 512: 2370 case 1024: 2371 readsize = st->blksize; 2372 st->flags |= ST_FIXEDBLOCKS; 2373 break; 2374 default: 2375 readsize = 1; 2376 st->flags &= ~ST_FIXEDBLOCKS; 2377 } 2378 if ((error = st->ops(st, ST_OPS_MODESELECT, XS_CTL_SILENT)) 2379 != 0) { 2380 /* 2381 * The device did not agree with the proposed 2382 * block size. If we exhausted our options, 2383 * return failure, else try another. 2384 */ 2385 if (readsize == 1) 2386 goto bad; 2387 st->blksize -= 512; 2388 continue; 2389 } 2390 st_read(st, bf, readsize, XS_CTL_SILENT); /* XXX */ 2391 if ((error = st_rewind(st, 0, 0)) != 0) { 2392 bad: free(bf, M_TEMP); 2393 return (error); 2394 } 2395 } while (readsize != 1 && readsize > st->blksize); 2396 2397 free(bf, M_TEMP); 2398 return (0); 2399 } 2400 2401 static int 2402 stdump(dev_t dev, daddr_t blkno, caddr_t va, size_t size) 2403 { 2404 2405 /* Not implemented. */ 2406 return (ENXIO); 2407 } 2408