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sys/dev/scsipi/st.c
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1 /* $NetBSD: st.c,v 1.207.4.1 2008/11/20 02:50:27 snj 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 1.207.4.1 2008/11/20 02:50:27 snj 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 st = device_lookup_private(&st_cd, unit); 542 if (st == NULL) 543 return (ENXIO); 544 545 stmode = STMODE(dev); 546 dsty = STDSTY(dev); 547 548 periph = st->sc_periph; 549 adapt = periph->periph_channel->chan_adapter; 550 551 SC_DEBUG(periph, SCSIPI_DB1, ("open: dev=0x%x (unit %d (of %d))\n", dev, 552 unit, st_cd.cd_ndevs)); 553 554 555 /* 556 * Only allow one at a time 557 */ 558 if (periph->periph_flags & PERIPH_OPEN) { 559 aprint_error_dev(&st->sc_dev, "already open\n"); 560 return (EBUSY); 561 } 562 563 if ((error = scsipi_adapter_addref(adapt)) != 0) 564 return (error); 565 566 /* 567 * clear any latched errors. 568 */ 569 st->mt_resid = 0; 570 st->mt_erreg = 0; 571 st->asc = 0; 572 st->ascq = 0; 573 574 /* 575 * Catch any unit attention errors. Be silent about this 576 * unless we're already mounted. We ignore media change 577 * if we're in control mode or not mounted yet. 578 */ 579 if ((st->flags & ST_MOUNTED) == 0 || stmode == CTRL_MODE) { 580 #ifdef SCSIDEBUG 581 sflags = XS_CTL_IGNORE_MEDIA_CHANGE; 582 #else 583 sflags = XS_CTL_SILENT|XS_CTL_IGNORE_MEDIA_CHANGE; 584 #endif 585 } else 586 sflags = 0; 587 588 /* 589 * If we're already mounted or we aren't configured for 590 * a mount delay, only try a test unit ready once. Otherwise, 591 * try up to ST_MOUNT_DELAY times with a rest interval of 592 * one second between each try. 593 */ 594 595 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0) { 596 ntries = 1; 597 } else { 598 ntries = ST_MOUNT_DELAY; 599 } 600 601 for (error = tries = 0; tries < ntries; tries++) { 602 int slpintr, oflags; 603 604 /* 605 * If we had no error, or we're opening the control mode 606 * device, we jump out right away. 607 */ 608 609 error = scsipi_test_unit_ready(periph, sflags); 610 if (error == 0 || stmode == CTRL_MODE) { 611 break; 612 } 613 614 /* 615 * We had an error. 616 * 617 * If we're already mounted or we aren't configured for 618 * a mount delay, or the error isn't a NOT READY error, 619 * skip to the error exit now. 620 */ 621 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0 || 622 (st->mt_key != SKEY_NOT_READY)) { 623 goto bad; 624 } 625 626 /* 627 * clear any latched errors. 628 */ 629 st->mt_resid = 0; 630 st->mt_erreg = 0; 631 st->asc = 0; 632 st->ascq = 0; 633 634 /* 635 * Fake that we have the device open so 636 * we block other apps from getting in. 637 */ 638 639 oflags = periph->periph_flags; 640 periph->periph_flags |= PERIPH_OPEN; 641 642 slpintr = tsleep(&lbolt, PUSER|PCATCH, "stload", 0); 643 644 periph->periph_flags = oflags; /* restore flags */ 645 if (slpintr) { 646 goto bad; 647 } 648 } 649 650 651 /* 652 * If the mode is 3 (e.g. minor = 3,7,11,15) then the device has 653 * been opened to set defaults and perform other, usually non-I/O 654 * related, operations. In this case, do a quick check to see 655 * whether the unit actually had a tape loaded (this will be known 656 * as to whether or not we got a NOT READY for the above 657 * unit attention). If a tape is there, go do a mount sequence. 658 */ 659 if (stmode == CTRL_MODE && st->mt_key == SKEY_NOT_READY) { 660 periph->periph_flags |= PERIPH_OPEN; 661 return (0); 662 } 663 664 /* 665 * If we get this far and had an error set, that means we failed 666 * to pass the 'test unit ready' test for the non-controlmode device, 667 * so we bounce the open. 668 */ 669 670 if (error) 671 return (error); 672 673 /* 674 * Else, we're now committed to saying we're open. 675 */ 676 677 periph->periph_flags |= PERIPH_OPEN; /* unit attn are now errors */ 678 679 /* 680 * If it's a different mode, or if the media has been 681 * invalidated, unmount the tape from the previous 682 * session but continue with open processing 683 */ 684 if (st->last_dsty != dsty || 685 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 686 st_unmount(st, NOEJECT); 687 688 /* 689 * If we are not mounted, then we should start a new 690 * mount session. 691 */ 692 if (!(st->flags & ST_MOUNTED)) { 693 if ((error = st_mount_tape(dev, flags)) != 0) 694 goto bad; 695 st->last_dsty = dsty; 696 } 697 if (!(st->quirks & ST_Q_NOPREVENT)) { 698 scsipi_prevent(periph, SPAMR_PREVENT_DT, 699 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 700 } 701 702 SC_DEBUG(periph, SCSIPI_DB2, ("open complete\n")); 703 return (0); 704 705 bad: 706 st_unmount(st, NOEJECT); 707 scsipi_adapter_delref(adapt); 708 periph->periph_flags &= ~PERIPH_OPEN; 709 return (error); 710 } 711 712 /* 713 * close the device.. only called if we are the LAST 714 * occurence of an open device 715 */ 716 static int 717 stclose(dev_t dev, int flags, int mode, struct lwp *l) 718 { 719 int stxx, error = 0; 720 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(dev)); 721 struct scsipi_periph *periph = st->sc_periph; 722 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 723 724 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("closing\n")); 725 726 /* 727 * Make sure that a tape opened in write-only mode will have 728 * file marks written on it when closed, even if not written to. 729 * 730 * This is for SUN compatibility. Actually, the Sun way of 731 * things is to: 732 * 733 * only write filemarks if there are fmks to be written and 734 * - open for write (possibly read/write) 735 * - the last operation was a write 736 * or: 737 * - opened for wronly 738 * - no data was written (including filemarks) 739 */ 740 741 stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); 742 if (((flags & FWRITE) && stxx == ST_WRITTEN) || 743 ((flags & O_ACCMODE) == FWRITE && stxx == 0)) { 744 int nm; 745 error = st_check_eod(st, FALSE, &nm, 0); 746 } 747 748 /* 749 * Allow robots to eject tape if needed. 750 */ 751 scsipi_prevent(periph, SPAMR_ALLOW, 752 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 753 754 switch (STMODE(dev)) { 755 case NORMAL_MODE: 756 st_unmount(st, NOEJECT); 757 break; 758 case NOREW_MODE: 759 case CTRL_MODE: 760 /* 761 * Leave mounted unless media seems to have been removed. 762 * 763 * Otherwise, if we're to terminate a tape with more than one 764 * filemark [ and because we're not rewinding here ], backspace 765 * one filemark so that later appends will see an unbroken 766 * sequence of: 767 * 768 * file - FMK - file - FMK ... file - FMK FMK (EOM) 769 */ 770 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 771 st_unmount(st, NOEJECT); 772 } else if (error == 0) { 773 /* 774 * ST_WRITTEN was preserved from above. 775 * 776 * All we need to know here is: 777 * 778 * Were we writing this tape and was the last 779 * operation a write? 780 * 781 * Are there supposed to be 2FM at EOD? 782 * 783 * If both statements are true, then we backspace 784 * one filemark. 785 */ 786 stxx |= (st->flags & ST_2FM_AT_EOD); 787 if ((flags & FWRITE) != 0 && 788 (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { 789 error = st_space(st, -1, SP_FILEMARKS, 0); 790 } 791 } 792 break; 793 case EJECT_MODE: 794 st_unmount(st, EJECT); 795 break; 796 } 797 798 scsipi_wait_drain(periph); 799 800 scsipi_adapter_delref(adapt); 801 periph->periph_flags &= ~PERIPH_OPEN; 802 803 return (error); 804 } 805 806 /* 807 * Start a new mount session. 808 * Copy in all the default parameters from the selected device mode. 809 * and try guess any that seem to be defaulted. 810 */ 811 static int 812 st_mount_tape(dev_t dev, int flags) 813 { 814 int unit; 815 u_int dsty; 816 struct st_softc *st; 817 struct scsipi_periph *periph; 818 int error = 0; 819 820 unit = STUNIT(dev); 821 dsty = STDSTY(dev); 822 st = device_lookup_private(&st_cd, unit); 823 periph = st->sc_periph; 824 825 if (st->flags & ST_MOUNTED) 826 return (0); 827 828 SC_DEBUG(periph, SCSIPI_DB1, ("mounting\n ")); 829 st->flags |= ST_NEW_MOUNT; 830 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 831 /* 832 * If the media is new, then make sure we give it a chance to 833 * to do a 'load' instruction. (We assume it is new.) 834 */ 835 if ((error = st_load(st, LD_LOAD, XS_CTL_SILENT)) != 0) 836 return (error); 837 /* 838 * Throw another dummy instruction to catch 839 * 'Unit attention' errors. Many drives give 840 * these after doing a Load instruction (with 841 * the MEDIUM MAY HAVE CHANGED asc/ascq). 842 */ 843 scsipi_test_unit_ready(periph, XS_CTL_SILENT); /* XXX */ 844 845 /* 846 * Some devices can't tell you much until they have been 847 * asked to look at the media. This quirk does this. 848 */ 849 if (st->quirks & ST_Q_SENSE_HELP) 850 if ((error = st_touch_tape(st)) != 0) 851 return (error); 852 /* 853 * Load the physical device parameters 854 * loads: blkmin, blkmax 855 */ 856 if ((error = st->ops(st, ST_OPS_RBL, 0)) != 0) 857 return (error); 858 /* 859 * Load the media dependent parameters 860 * includes: media_blksize,media_density,numblks 861 * As we have a tape in, it should be reflected here. 862 * If not you may need the "quirk" above. 863 */ 864 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 865 return (error); 866 /* 867 * If we have gained a permanent density from somewhere, 868 * then use it in preference to the one supplied by 869 * default by the driver. 870 */ 871 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 872 st->density = st->modes[dsty].density; 873 else 874 st->density = st->media_density; 875 /* 876 * If we have gained a permanent blocksize 877 * then use it in preference to the one supplied by 878 * default by the driver. 879 */ 880 st->flags &= ~ST_FIXEDBLOCKS; 881 if (st->modeflags[dsty] & 882 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 883 st->blksize = st->modes[dsty].blksize; 884 if (st->blksize) 885 st->flags |= ST_FIXEDBLOCKS; 886 } else { 887 if ((error = st_decide_mode(st, FALSE)) != 0) 888 return (error); 889 } 890 if ((error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 891 /* ATAPI will return ENODEV for this, and this may be OK */ 892 if (error != ENODEV) { 893 aprint_error_dev(&st->sc_dev, "cannot set selected mode\n"); 894 return (error); 895 } 896 } 897 st->flags &= ~ST_NEW_MOUNT; 898 st->flags |= ST_MOUNTED; 899 periph->periph_flags |= PERIPH_MEDIA_LOADED; /* move earlier? */ 900 st->blkno = st->fileno = (daddr_t) 0; 901 return (0); 902 } 903 904 /* 905 * End the present mount session. 906 * Rewind, and optionally eject the tape. 907 * Reset various flags to indicate that all new 908 * operations require another mount operation 909 */ 910 static void 911 st_unmount(struct st_softc *st, boolean eject) 912 { 913 struct scsipi_periph *periph = st->sc_periph; 914 int nmarks; 915 916 if ((st->flags & ST_MOUNTED) == 0) 917 return; 918 SC_DEBUG(periph, SCSIPI_DB1, ("unmounting\n")); 919 st_check_eod(st, FALSE, &nmarks, XS_CTL_IGNORE_NOT_READY); 920 st_rewind(st, 0, XS_CTL_IGNORE_NOT_READY); 921 922 /* 923 * Section 9.3.3 of the SCSI specs states that a device shall return 924 * the density value specified in the last succesfull MODE SELECT 925 * after an unload operation, in case it is not able to 926 * automatically determine the density of the new medium. 927 * 928 * So we instruct the device to use the default density, which will 929 * prevent the use of stale density values (in particular, 930 * in st_touch_tape(). 931 */ 932 st->density = 0; 933 if (st->ops(st, ST_OPS_MODESELECT, 0) != 0) { 934 aprint_error_dev(&st->sc_dev, "WARNING: cannot revert to default density\n"); 935 } 936 937 if (eject) { 938 if (!(st->quirks & ST_Q_NOPREVENT)) { 939 scsipi_prevent(periph, SPAMR_ALLOW, 940 XS_CTL_IGNORE_ILLEGAL_REQUEST | 941 XS_CTL_IGNORE_NOT_READY); 942 } 943 st_load(st, LD_UNLOAD, XS_CTL_IGNORE_NOT_READY); 944 st->blkno = st->fileno = (daddr_t) -1; 945 } else { 946 st->blkno = st->fileno = (daddr_t) 0; 947 } 948 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 949 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 950 } 951 952 /* 953 * Given all we know about the device, media, mode, 'quirks' and 954 * initial operation, make a decision as to how we should be set 955 * to run (regarding blocking and EOD marks) 956 */ 957 int 958 st_decide_mode(struct st_softc *st, boolean first_read) 959 { 960 961 SC_DEBUG(st->sc_periph, SCSIPI_DB2, ("starting block mode decision\n")); 962 963 /* 964 * If the drive can only handle fixed-length blocks and only at 965 * one size, perhaps we should just do that. 966 */ 967 if (st->blkmin && (st->blkmin == st->blkmax)) { 968 st->flags |= ST_FIXEDBLOCKS; 969 st->blksize = st->blkmin; 970 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 971 ("blkmin == blkmax of %d\n", st->blkmin)); 972 goto done; 973 } 974 /* 975 * If the tape density mandates (or even suggests) use of fixed 976 * or variable-length blocks, comply. 977 */ 978 switch (st->density) { 979 case HALFINCH_800: 980 case HALFINCH_1600: 981 case HALFINCH_6250: 982 case DDS: 983 st->flags &= ~ST_FIXEDBLOCKS; 984 st->blksize = 0; 985 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 986 ("density specified variable\n")); 987 goto done; 988 case QIC_11: 989 case QIC_24: 990 case QIC_120: 991 case QIC_150: 992 case QIC_525: 993 case QIC_1320: 994 case QIC_3095: 995 case QIC_3220: 996 st->flags |= ST_FIXEDBLOCKS; 997 if (st->media_blksize > 0) 998 st->blksize = st->media_blksize; 999 else 1000 st->blksize = DEF_FIXED_BSIZE; 1001 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1002 ("density specified fixed\n")); 1003 goto done; 1004 } 1005 /* 1006 * If we're about to read the tape, perhaps we should choose 1007 * fixed or variable-length blocks and block size according to 1008 * what the drive found on the tape. 1009 */ 1010 if (first_read && 1011 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 1012 (st->media_blksize == DEF_FIXED_BSIZE) || 1013 (st->media_blksize == 1024))) { 1014 if (st->media_blksize > 0) 1015 st->flags |= ST_FIXEDBLOCKS; 1016 else 1017 st->flags &= ~ST_FIXEDBLOCKS; 1018 st->blksize = st->media_blksize; 1019 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1020 ("Used media_blksize of %d\n", st->media_blksize)); 1021 goto done; 1022 } 1023 /* 1024 * We're getting no hints from any direction. Choose variable- 1025 * length blocks arbitrarily. 1026 */ 1027 st->flags &= ~ST_FIXEDBLOCKS; 1028 st->blksize = 0; 1029 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1030 ("Give up and default to variable mode\n")); 1031 1032 done: 1033 /* 1034 * Decide whether or not to write two file marks to signify end- 1035 * of-data. Make the decision as a function of density. If 1036 * the decision is not to use a second file mark, the SCSI BLANK 1037 * CHECK condition code will be recognized as end-of-data when 1038 * first read. 1039 * (I think this should be a by-product of fixed/variable..julian) 1040 */ 1041 switch (st->density) { 1042 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 1043 case QIC_11: 1044 case QIC_24: 1045 case QIC_120: 1046 case QIC_150: 1047 case QIC_525: 1048 case QIC_1320: 1049 case QIC_3095: 1050 case QIC_3220: 1051 st->flags &= ~ST_2FM_AT_EOD; 1052 break; 1053 default: 1054 st->flags |= ST_2FM_AT_EOD; 1055 } 1056 return (0); 1057 } 1058 1059 /* 1060 * Actually translate the requested transfer into 1061 * one the physical driver can understand 1062 * The transfer is described by a buf and will include 1063 * only one physical transfer. 1064 */ 1065 static void 1066 ststrategy(struct buf *bp) 1067 { 1068 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(bp->b_dev)); 1069 int s; 1070 1071 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1072 ("ststrategy %d bytes @ blk %" PRId64 "\n", bp->b_bcount, bp->b_blkno)); 1073 /* 1074 * If it's a null transfer, return immediately 1075 */ 1076 if (bp->b_bcount == 0) 1077 goto abort; 1078 1079 /* If offset is negative, error */ 1080 if (bp->b_blkno < 0) { 1081 bp->b_error = EINVAL; 1082 goto abort; 1083 } 1084 1085 /* 1086 * Odd sized request on fixed drives are verboten 1087 */ 1088 if (st->flags & ST_FIXEDBLOCKS) { 1089 if (bp->b_bcount % st->blksize) { 1090 aprint_error_dev(&st->sc_dev, "bad request, must be multiple of %d\n", 1091 st->blksize); 1092 bp->b_error = EIO; 1093 goto abort; 1094 } 1095 } 1096 /* 1097 * as are out-of-range requests on variable drives. 1098 */ 1099 else if (bp->b_bcount < st->blkmin || 1100 (st->blkmax && bp->b_bcount > st->blkmax)) { 1101 aprint_error_dev(&st->sc_dev, "bad request, must be between %d and %d\n", 1102 st->blkmin, st->blkmax); 1103 bp->b_error = EIO; 1104 goto abort; 1105 } 1106 s = splbio(); 1107 1108 /* 1109 * Place it in the queue of activities for this tape 1110 * at the end (a bit silly because we only have on user.. 1111 * (but it could fork())) 1112 */ 1113 BUFQ_PUT(st->buf_queue, bp); 1114 1115 /* 1116 * Tell the device to get going on the transfer if it's 1117 * not doing anything, otherwise just wait for completion 1118 * (All a bit silly if we're only allowing 1 open but..) 1119 */ 1120 ststart(st->sc_periph); 1121 1122 splx(s); 1123 return; 1124 abort: 1125 /* 1126 * Reset the residue because we didn't do anything, 1127 * and send the buffer back as done. 1128 */ 1129 bp->b_resid = bp->b_bcount; 1130 biodone(bp); 1131 return; 1132 } 1133 1134 /* 1135 * ststart looks to see if there is a buf waiting for the device 1136 * and that the device is not already busy. If both are true, 1137 * It dequeues the buf and creates a scsi command to perform the 1138 * transfer required. The transfer request will call scsipi_done 1139 * on completion, which will in turn call this routine again 1140 * so that the next queued transfer is performed. 1141 * The bufs are queued by the strategy routine (ststrategy) 1142 * 1143 * This routine is also called after other non-queued requests 1144 * have been made of the scsi driver, to ensure that the queue 1145 * continues to be drained. 1146 * ststart() is called at splbio 1147 */ 1148 static void 1149 ststart(struct scsipi_periph *periph) 1150 { 1151 struct st_softc *st = (void *)periph->periph_dev; 1152 struct buf *bp; 1153 struct scsi_rw_tape cmd; 1154 struct scsipi_xfer *xs; 1155 int flags, error; 1156 1157 SC_DEBUG(periph, SCSIPI_DB2, ("ststart ")); 1158 /* 1159 * See if there is a buf to do and we are not already 1160 * doing one 1161 */ 1162 while (periph->periph_active < periph->periph_openings) { 1163 /* if a special awaits, let it proceed first */ 1164 if (periph->periph_flags & PERIPH_WAITING) { 1165 periph->periph_flags &= ~PERIPH_WAITING; 1166 wakeup((void *)periph); 1167 return; 1168 } 1169 1170 /* 1171 * If the device has been unmounted by the user 1172 * then throw away all requests until done. 1173 */ 1174 if (__predict_false((st->flags & ST_MOUNTED) == 0 || 1175 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0)) { 1176 if ((bp = BUFQ_GET(st->buf_queue)) != NULL) { 1177 /* make sure that one implies the other.. */ 1178 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 1179 bp->b_error = EIO; 1180 bp->b_resid = bp->b_bcount; 1181 biodone(bp); 1182 continue; 1183 } else { 1184 return; 1185 } 1186 } 1187 1188 if ((bp = BUFQ_PEEK(st->buf_queue)) == NULL) 1189 return; 1190 1191 iostat_busy(st->stats); 1192 1193 /* 1194 * only FIXEDBLOCK devices have pending I/O or space operations. 1195 */ 1196 if (st->flags & ST_FIXEDBLOCKS) { 1197 /* 1198 * If we are at a filemark but have not reported it yet 1199 * then we should report it now 1200 */ 1201 if (st->flags & ST_AT_FILEMARK) { 1202 if ((bp->b_flags & B_READ) == B_WRITE) { 1203 /* 1204 * Handling of ST_AT_FILEMARK in 1205 * st_space will fill in the right file 1206 * mark count. 1207 * Back up over filemark 1208 */ 1209 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1210 BUFQ_GET(st->buf_queue); 1211 bp->b_error = EIO; 1212 bp->b_resid = bp->b_bcount; 1213 biodone(bp); 1214 continue; 1215 } 1216 } else { 1217 BUFQ_GET(st->buf_queue); 1218 bp->b_resid = bp->b_bcount; 1219 bp->b_error = 0; 1220 st->flags &= ~ST_AT_FILEMARK; 1221 biodone(bp); 1222 continue; /* seek more work */ 1223 } 1224 } 1225 } 1226 /* 1227 * If we are at EOM but have not reported it 1228 * yet then we should report it now. 1229 */ 1230 if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { 1231 BUFQ_GET(st->buf_queue); 1232 bp->b_resid = bp->b_bcount; 1233 if (st->flags & ST_EIO_PENDING) 1234 bp->b_error = EIO; 1235 st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); 1236 biodone(bp); 1237 continue; /* seek more work */ 1238 } 1239 1240 /* 1241 * Fill out the scsi command 1242 */ 1243 memset(&cmd, 0, sizeof(cmd)); 1244 flags = XS_CTL_NOSLEEP | XS_CTL_ASYNC; 1245 if ((bp->b_flags & B_READ) == B_WRITE) { 1246 cmd.opcode = WRITE; 1247 st->flags &= ~ST_FM_WRITTEN; 1248 flags |= XS_CTL_DATA_OUT; 1249 } else { 1250 cmd.opcode = READ; 1251 flags |= XS_CTL_DATA_IN; 1252 } 1253 1254 /* 1255 * Handle "fixed-block-mode" tape drives by using the 1256 * block count instead of the length. 1257 */ 1258 if (st->flags & ST_FIXEDBLOCKS) { 1259 cmd.byte2 |= SRW_FIXED; 1260 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1261 } else 1262 _lto3b(bp->b_bcount, cmd.len); 1263 1264 /* 1265 * Clear 'position updated' indicator 1266 */ 1267 st->flags &= ~ST_POSUPDATED; 1268 1269 /* 1270 * go ask the adapter to do all this for us 1271 */ 1272 xs = scsipi_make_xs(periph, 1273 (struct scsipi_generic *)&cmd, sizeof(cmd), 1274 (u_char *)bp->b_data, bp->b_bcount, 1275 0, ST_IO_TIME, bp, flags); 1276 if (__predict_false(xs == NULL)) { 1277 /* 1278 * out of memory. Keep this buffer in the queue, and 1279 * retry later. 1280 */ 1281 callout_reset(&st->sc_callout, hz / 2, strestart, 1282 periph); 1283 return; 1284 } 1285 /* 1286 * need to dequeue the buffer before queuing the command, 1287 * because cdstart may be called recursively from the 1288 * HBA driver 1289 */ 1290 #ifdef DIAGNOSTIC 1291 if (BUFQ_GET(st->buf_queue) != bp) 1292 panic("ststart(): dequeued wrong buf"); 1293 #else 1294 BUFQ_GET(st->buf_queue); 1295 #endif 1296 error = scsipi_execute_xs(xs); 1297 /* with a scsipi_xfer preallocated, scsipi_command can't fail */ 1298 KASSERT(error == 0); 1299 } /* go back and see if we can cram more work in.. */ 1300 } 1301 1302 static void 1303 strestart(void *v) 1304 { 1305 int s = splbio(); 1306 ststart((struct scsipi_periph *)v); 1307 splx(s); 1308 } 1309 1310 1311 static void 1312 stdone(struct scsipi_xfer *xs, int error) 1313 { 1314 struct st_softc *st = (void *)xs->xs_periph->periph_dev; 1315 struct buf *bp = xs->bp; 1316 1317 if (bp) { 1318 bp->b_error = error; 1319 bp->b_resid = xs->resid; 1320 /* 1321 * buggy device ? A SDLT320 can report an info 1322 * field of 0x3de8000 on a Media Error/Write Error 1323 * for this CBD: 0x0a 00 00 80 00 00 1324 */ 1325 if (bp->b_resid > bp->b_bcount || bp->b_resid < 0) 1326 bp->b_resid = bp->b_bcount; 1327 1328 if ((bp->b_flags & B_READ) == B_WRITE) 1329 st->flags |= ST_WRITTEN; 1330 else 1331 st->flags &= ~ST_WRITTEN; 1332 1333 iostat_unbusy(st->stats, bp->b_bcount, 1334 ((bp->b_flags & B_READ) == B_READ)); 1335 1336 #if NRND > 0 1337 rnd_add_uint32(&st->rnd_source, bp->b_blkno); 1338 #endif 1339 1340 if ((st->flags & ST_POSUPDATED) == 0) { 1341 if (error) { 1342 st->fileno = st->blkno = -1; 1343 } else if (st->blkno != -1) { 1344 if (st->flags & ST_FIXEDBLOCKS) 1345 st->blkno += 1346 (bp->b_bcount / st->blksize); 1347 else 1348 st->blkno++; 1349 } 1350 } 1351 1352 biodone(bp); 1353 } 1354 } 1355 1356 static int 1357 stread(dev_t dev, struct uio *uio, int iomode) 1358 { 1359 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(dev)); 1360 1361 return (physio(ststrategy, NULL, dev, B_READ, 1362 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1363 } 1364 1365 static int 1366 stwrite(dev_t dev, struct uio *uio, int iomode) 1367 { 1368 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(dev)); 1369 1370 return (physio(ststrategy, NULL, dev, B_WRITE, 1371 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1372 } 1373 1374 /* 1375 * Perform special action on behalf of the user; 1376 * knows about the internals of this device 1377 */ 1378 static int 1379 stioctl(dev_t dev, u_long cmd, void *arg, int flag, struct lwp *l) 1380 { 1381 int error = 0; 1382 int unit; 1383 int number, nmarks, dsty; 1384 int flags; 1385 struct st_softc *st; 1386 int hold_blksize; 1387 u_int8_t hold_density; 1388 struct mtop *mt = (struct mtop *) arg; 1389 1390 /* 1391 * Find the device that the user is talking about 1392 */ 1393 flags = 0; /* give error messages, act on errors etc. */ 1394 unit = STUNIT(dev); 1395 dsty = STDSTY(dev); 1396 st = device_lookup_private(&st_cd, unit); 1397 hold_blksize = st->blksize; 1398 hold_density = st->density; 1399 1400 switch ((u_int) cmd) { 1401 1402 case MTIOCGET: { 1403 struct mtget *g = (struct mtget *) arg; 1404 /* 1405 * (to get the current state of READONLY) 1406 */ 1407 error = st->ops(st, ST_OPS_MODESENSE, XS_CTL_SILENT); 1408 if (error) { 1409 /* 1410 * Ignore the error if in control mode; 1411 * this is mandated by st(4). 1412 */ 1413 if (STMODE(dev) != CTRL_MODE) 1414 break; 1415 error = 0; 1416 } 1417 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("[ioctl: get status]\n")); 1418 memset(g, 0, sizeof(struct mtget)); 1419 g->mt_type = 0x7; /* Ultrix compat *//*? */ 1420 g->mt_blksiz = st->blksize; 1421 g->mt_density = st->density; 1422 g->mt_mblksiz[0] = st->modes[0].blksize; 1423 g->mt_mblksiz[1] = st->modes[1].blksize; 1424 g->mt_mblksiz[2] = st->modes[2].blksize; 1425 g->mt_mblksiz[3] = st->modes[3].blksize; 1426 g->mt_mdensity[0] = st->modes[0].density; 1427 g->mt_mdensity[1] = st->modes[1].density; 1428 g->mt_mdensity[2] = st->modes[2].density; 1429 g->mt_mdensity[3] = st->modes[3].density; 1430 g->mt_fileno = st->fileno; 1431 g->mt_blkno = st->blkno; 1432 if (st->flags & ST_READONLY) 1433 g->mt_dsreg |= MT_DS_RDONLY; 1434 if (st->flags & ST_MOUNTED) 1435 g->mt_dsreg |= MT_DS_MOUNTED; 1436 g->mt_resid = st->mt_resid; 1437 g->mt_erreg = st->mt_erreg; 1438 /* 1439 * clear latched errors. 1440 */ 1441 st->mt_resid = 0; 1442 st->mt_erreg = 0; 1443 st->asc = 0; 1444 st->ascq = 0; 1445 break; 1446 } 1447 case MTIOCTOP: { 1448 1449 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1450 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1451 mt->mt_count)); 1452 1453 /* compat: in U*x it is a short */ 1454 number = mt->mt_count; 1455 switch ((short) (mt->mt_op)) { 1456 case MTWEOF: /* write an end-of-file record */ 1457 error = st_write_filemarks(st, number, flags); 1458 break; 1459 case MTBSF: /* backward space file */ 1460 number = -number; 1461 case MTFSF: /* forward space file */ 1462 error = st_check_eod(st, FALSE, &nmarks, flags); 1463 if (!error) 1464 error = st_space(st, number - nmarks, 1465 SP_FILEMARKS, flags); 1466 break; 1467 case MTBSR: /* backward space record */ 1468 number = -number; 1469 case MTFSR: /* forward space record */ 1470 error = st_check_eod(st, true, &nmarks, flags); 1471 if (!error) 1472 error = st_space(st, number, SP_BLKS, flags); 1473 break; 1474 case MTREW: /* rewind */ 1475 error = st_rewind(st, 0, flags); 1476 break; 1477 case MTOFFL: /* rewind and put the drive offline */ 1478 st_unmount(st, EJECT); 1479 break; 1480 case MTNOP: /* no operation, sets status only */ 1481 break; 1482 case MTRETEN: /* retension the tape */ 1483 error = st_load(st, LD_RETENSION, flags); 1484 if (!error) 1485 error = st_load(st, LD_LOAD, flags); 1486 break; 1487 case MTEOM: /* forward space to end of media */ 1488 error = st_check_eod(st, FALSE, &nmarks, flags); 1489 if (!error) 1490 error = st_space(st, 1, SP_EOM, flags); 1491 break; 1492 case MTCACHE: /* enable controller cache */ 1493 st->flags &= ~ST_DONTBUFFER; 1494 goto try_new_value; 1495 case MTNOCACHE: /* disable controller cache */ 1496 st->flags |= ST_DONTBUFFER; 1497 goto try_new_value; 1498 case MTERASE: /* erase volume */ 1499 error = st_erase(st, number, flags); 1500 break; 1501 case MTSETBSIZ: /* Set block size for device */ 1502 #ifdef NOTYET 1503 if (!(st->flags & ST_NEW_MOUNT)) { 1504 uprintf("re-mount tape before changing blocksize"); 1505 error = EINVAL; 1506 break; 1507 } 1508 #endif 1509 if (number == 0) 1510 st->flags &= ~ST_FIXEDBLOCKS; 1511 else { 1512 if ((st->blkmin || st->blkmax) && 1513 (number < st->blkmin || 1514 number > st->blkmax)) { 1515 error = EINVAL; 1516 break; 1517 } 1518 st->flags |= ST_FIXEDBLOCKS; 1519 } 1520 st->blksize = number; 1521 st->flags |= ST_BLOCK_SET; /*XXX */ 1522 goto try_new_value; 1523 1524 case MTSETDNSTY: /* Set density for device and mode */ 1525 /* 1526 * Any number >= 0 and <= 0xff is legal. Numbers 1527 * above 0x80 are 'vendor unique'. 1528 */ 1529 if (number < 0 || number > 255) { 1530 error = EINVAL; 1531 break; 1532 } else 1533 st->density = number; 1534 goto try_new_value; 1535 1536 case MTCMPRESS: 1537 error = st->ops(st, (number == 0) ? 1538 ST_OPS_CMPRSS_OFF : ST_OPS_CMPRSS_ON, 1539 XS_CTL_SILENT); 1540 break; 1541 1542 case MTEWARN: 1543 if (number) 1544 st->flags |= ST_EARLYWARN; 1545 else 1546 st->flags &= ~ST_EARLYWARN; 1547 break; 1548 1549 default: 1550 error = EINVAL; 1551 } 1552 break; 1553 } 1554 case MTIOCIEOT: 1555 case MTIOCEEOT: 1556 break; 1557 1558 case MTIOCRDSPOS: 1559 error = st_rdpos(st, 0, (u_int32_t *) arg); 1560 break; 1561 1562 case MTIOCRDHPOS: 1563 error = st_rdpos(st, 1, (u_int32_t *) arg); 1564 break; 1565 1566 case MTIOCSLOCATE: 1567 error = st_setpos(st, 0, (u_int32_t *) arg); 1568 break; 1569 1570 case MTIOCHLOCATE: 1571 error = st_setpos(st, 1, (u_int32_t *) arg); 1572 break; 1573 1574 1575 default: 1576 error = scsipi_do_ioctl(st->sc_periph, dev, cmd, arg, 1577 flag, l); 1578 break; 1579 } 1580 return (error); 1581 /*-----------------------------*/ 1582 try_new_value: 1583 /* 1584 * Check that the mode being asked for is aggreeable to the 1585 * drive. If not, put it back the way it was. 1586 * 1587 * If in control mode, we can make (persistent) mode changes 1588 * even if no medium is loaded (see st(4)). 1589 */ 1590 if ((STMODE(dev) != CTRL_MODE || (st->flags & ST_MOUNTED) != 0) && 1591 (error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 1592 /* put it back as it was */ 1593 aprint_error_dev(&st->sc_dev, "cannot set selected mode\n"); 1594 st->density = hold_density; 1595 st->blksize = hold_blksize; 1596 if (st->blksize) 1597 st->flags |= ST_FIXEDBLOCKS; 1598 else 1599 st->flags &= ~ST_FIXEDBLOCKS; 1600 return (error); 1601 } 1602 /* 1603 * As the drive liked it, if we are setting a new default, 1604 * set it into the structures as such. 1605 * 1606 * The means for deciding this are not finalised yet- but 1607 * if the device was opened in Control Mode, the values 1608 * are persistent now across mounts. 1609 */ 1610 if (STMODE(dev) == CTRL_MODE) { 1611 switch ((short) (mt->mt_op)) { 1612 case MTSETBSIZ: 1613 st->modes[dsty].blksize = st->blksize; 1614 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1615 break; 1616 case MTSETDNSTY: 1617 st->modes[dsty].density = st->density; 1618 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1619 break; 1620 } 1621 } 1622 return (0); 1623 } 1624 1625 /* 1626 * Do a synchronous read. 1627 */ 1628 static int 1629 st_read(struct st_softc *st, char *bf, int size, int flags) 1630 { 1631 struct scsi_rw_tape cmd; 1632 1633 /* 1634 * If it's a null transfer, return immediatly 1635 */ 1636 if (size == 0) 1637 return (0); 1638 memset(&cmd, 0, sizeof(cmd)); 1639 cmd.opcode = READ; 1640 if (st->flags & ST_FIXEDBLOCKS) { 1641 cmd.byte2 |= SRW_FIXED; 1642 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1643 cmd.len); 1644 } else 1645 _lto3b(size, cmd.len); 1646 return (scsipi_command(st->sc_periph, 1647 (void *)&cmd, sizeof(cmd), (void *)bf, size, 0, ST_IO_TIME, NULL, 1648 flags | XS_CTL_DATA_IN)); 1649 } 1650 1651 /* 1652 * issue an erase command 1653 */ 1654 static int 1655 st_erase(struct st_softc *st, int full, int flags) 1656 { 1657 int tmo; 1658 struct scsi_erase cmd; 1659 1660 /* 1661 * Full erase means set LONG bit in erase command, which asks 1662 * the drive to erase the entire unit. Without this bit, we're 1663 * asking the drive to write an erase gap. 1664 */ 1665 memset(&cmd, 0, sizeof(cmd)); 1666 cmd.opcode = ERASE; 1667 if (full) { 1668 cmd.byte2 = SE_LONG; 1669 tmo = ST_SPC_TIME; 1670 } else { 1671 tmo = ST_IO_TIME; 1672 } 1673 1674 /* 1675 * XXX We always do this asynchronously, for now, unless the device 1676 * has the ST_Q_ERASE_NOIMM quirk. How long should we wait if we 1677 * want to (eventually) to it synchronously? 1678 */ 1679 if ((st->quirks & ST_Q_ERASE_NOIMM) == 0) 1680 cmd.byte2 |= SE_IMMED; 1681 1682 return (scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1683 ST_RETRIES, tmo, NULL, flags)); 1684 } 1685 1686 /* 1687 * skip N blocks/filemarks/seq filemarks/eom 1688 */ 1689 static int 1690 st_space(struct st_softc *st, int number, u_int what, int flags) 1691 { 1692 struct scsi_space cmd; 1693 int error; 1694 1695 switch (what) { 1696 case SP_BLKS: 1697 if (st->flags & ST_PER_ACTION) { 1698 if (number > 0) { 1699 st->flags &= ~ST_PER_ACTION; 1700 return (EIO); 1701 } else if (number < 0) { 1702 if (st->flags & ST_AT_FILEMARK) { 1703 /* 1704 * Handling of ST_AT_FILEMARK 1705 * in st_space will fill in the 1706 * right file mark count. 1707 */ 1708 error = st_space(st, 0, SP_FILEMARKS, 1709 flags); 1710 if (error) 1711 return (error); 1712 } 1713 if (st->flags & ST_BLANK_READ) { 1714 st->flags &= ~ST_BLANK_READ; 1715 return (EIO); 1716 } 1717 st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); 1718 } 1719 } 1720 break; 1721 case SP_FILEMARKS: 1722 if (st->flags & ST_EIO_PENDING) { 1723 if (number > 0) { 1724 /* pretend we just discovered the error */ 1725 st->flags &= ~ST_EIO_PENDING; 1726 return (EIO); 1727 } else if (number < 0) { 1728 /* back away from the error */ 1729 st->flags &= ~ST_EIO_PENDING; 1730 } 1731 } 1732 if (st->flags & ST_AT_FILEMARK) { 1733 st->flags &= ~ST_AT_FILEMARK; 1734 number--; 1735 } 1736 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 1737 /* back away from unwritten tape */ 1738 st->flags &= ~ST_BLANK_READ; 1739 number++; /* XXX dubious */ 1740 } 1741 break; 1742 case SP_EOM: 1743 if (st->flags & ST_EOM_PENDING) { 1744 /* we're already there */ 1745 st->flags &= ~ST_EOM_PENDING; 1746 return (0); 1747 } 1748 if (st->flags & ST_EIO_PENDING) { 1749 /* pretend we just discovered the error */ 1750 st->flags &= ~ST_EIO_PENDING; 1751 return (EIO); 1752 } 1753 if (st->flags & ST_AT_FILEMARK) 1754 st->flags &= ~ST_AT_FILEMARK; 1755 break; 1756 } 1757 if (number == 0) 1758 return (0); 1759 1760 memset(&cmd, 0, sizeof(cmd)); 1761 cmd.opcode = SPACE; 1762 cmd.byte2 = what; 1763 _lto3b(number, cmd.number); 1764 1765 st->flags &= ~ST_POSUPDATED; 1766 st->last_ctl_resid = 0; 1767 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1768 0, ST_SPC_TIME, NULL, flags); 1769 1770 if (error == 0 && (st->flags & ST_POSUPDATED) == 0) { 1771 number = number - st->last_ctl_resid; 1772 if (what == SP_BLKS) { 1773 if (st->blkno != -1) { 1774 st->blkno += number; 1775 } 1776 } else if (what == SP_FILEMARKS) { 1777 if (st->fileno != -1) { 1778 st->fileno += number; 1779 if (number > 0) { 1780 st->blkno = 0; 1781 } else if (number < 0) { 1782 st->blkno = -1; 1783 } 1784 } 1785 } else if (what == SP_EOM) { 1786 /* 1787 * This loses us relative position. 1788 */ 1789 st->fileno = st->blkno = -1; 1790 } 1791 } 1792 return (error); 1793 } 1794 1795 /* 1796 * write N filemarks 1797 */ 1798 static int 1799 st_write_filemarks(struct st_softc *st, int number, int flags) 1800 { 1801 int error; 1802 struct scsi_write_filemarks cmd; 1803 1804 /* 1805 * It's hard to write a negative number of file marks. 1806 * Don't try. 1807 */ 1808 if (number < 0) 1809 return (EINVAL); 1810 switch (number) { 1811 case 0: /* really a command to sync the drive's buffers */ 1812 break; 1813 case 1: 1814 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 1815 st->flags &= ~ST_WRITTEN; 1816 else 1817 st->flags |= ST_FM_WRITTEN; 1818 st->flags &= ~ST_PER_ACTION; 1819 break; 1820 default: 1821 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 1822 } 1823 1824 memset(&cmd, 0, sizeof(cmd)); 1825 cmd.opcode = WRITE_FILEMARKS; 1826 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1827 cmd.byte2 = SR_IMMED; 1828 /* 1829 * The ATAPI Onstream DI-30 doesn't support writing filemarks, but 1830 * WRITE_FILEMARKS is still used to flush the buffer 1831 */ 1832 if ((st->quirks & ST_Q_NOFILEMARKS) == 0) 1833 _lto3b(number, cmd.number); 1834 1835 /* XXX WE NEED TO BE ABLE TO GET A RESIDIUAL XXX */ 1836 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1837 0, ST_IO_TIME * 4, NULL, flags); 1838 if (error == 0 && st->fileno != -1) { 1839 st->fileno += number; 1840 } 1841 return (error); 1842 } 1843 1844 /* 1845 * Make sure the right number of file marks is on tape if the 1846 * tape has been written. If the position argument is true, 1847 * leave the tape positioned where it was originally. 1848 * 1849 * nmarks returns the number of marks to skip (or, if position 1850 * true, which were skipped) to get back original position. 1851 */ 1852 static int 1853 st_check_eod(struct st_softc *st, boolean position, int *nmarks, int flags) 1854 { 1855 int error; 1856 1857 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 1858 default: 1859 *nmarks = 0; 1860 return (0); 1861 case ST_WRITTEN: 1862 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 1863 *nmarks = 1; 1864 break; 1865 case ST_WRITTEN | ST_2FM_AT_EOD: 1866 *nmarks = 2; 1867 } 1868 error = st_write_filemarks(st, *nmarks, flags); 1869 if (position && !error) 1870 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 1871 return (error); 1872 } 1873 1874 /* 1875 * load/unload/retension 1876 */ 1877 static int 1878 st_load(struct st_softc *st, u_int type, int flags) 1879 { 1880 int error; 1881 struct scsi_load cmd; 1882 1883 if (type != LD_LOAD) { 1884 int nmarks; 1885 1886 error = st_check_eod(st, FALSE, &nmarks, flags); 1887 if (error) { 1888 aprint_error_dev(&st->sc_dev, "failed to write closing filemarks at " 1889 "unload, errno=%d\n", error); 1890 return (error); 1891 } 1892 } 1893 if (st->quirks & ST_Q_IGNORE_LOADS) { 1894 if (type == LD_LOAD) { 1895 /* 1896 * If we ignore loads, at least we should try a rewind. 1897 */ 1898 return st_rewind(st, 0, flags); 1899 } 1900 /* otherwise, we should do what's asked of us */ 1901 } 1902 1903 memset(&cmd, 0, sizeof(cmd)); 1904 cmd.opcode = LOAD; 1905 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1906 cmd.byte2 = SR_IMMED; 1907 cmd.how = type; 1908 1909 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1910 ST_RETRIES, ST_SPC_TIME, NULL, flags); 1911 if (error) { 1912 aprint_error_dev(&st->sc_dev, "error %d in st_load (op %d)\n", 1913 error, type); 1914 } 1915 return (error); 1916 } 1917 1918 /* 1919 * Rewind the device 1920 */ 1921 static int 1922 st_rewind(struct st_softc *st, u_int immediate, int flags) 1923 { 1924 struct scsi_rewind cmd; 1925 int error; 1926 int nmarks; 1927 int timeout; 1928 1929 error = st_check_eod(st, FALSE, &nmarks, flags); 1930 if (error) { 1931 aprint_error_dev(&st->sc_dev, "failed to write closing filemarks at " 1932 "rewind, errno=%d\n", error); 1933 return (error); 1934 } 1935 st->flags &= ~ST_PER_ACTION; 1936 1937 /* If requestor asked for immediate response, set a short timeout */ 1938 timeout = immediate ? ST_CTL_TIME : ST_SPC_TIME; 1939 1940 /* 1941 * ATAPI tapes always need immediate to be set 1942 */ 1943 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1944 immediate = SR_IMMED; 1945 1946 memset(&cmd, 0, sizeof(cmd)); 1947 cmd.opcode = REWIND; 1948 cmd.byte2 = immediate; 1949 1950 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1951 ST_RETRIES, timeout, NULL, flags); 1952 if (error) { 1953 aprint_error_dev(&st->sc_dev, "error %d trying to rewind\n", 1954 error); 1955 /* lost position */ 1956 st->fileno = st->blkno = -1; 1957 } else { 1958 st->fileno = st->blkno = 0; 1959 } 1960 return (error); 1961 } 1962 1963 static int 1964 st_rdpos(struct st_softc *st, int hard, u_int32_t *blkptr) 1965 { 1966 int error; 1967 u_int8_t posdata[20]; 1968 struct scsi_tape_read_position cmd; 1969 1970 /* 1971 * We try and flush any buffered writes here if we were writing 1972 * and we're trying to get hardware block position. It eats 1973 * up performance substantially, but I'm wary of drive firmware. 1974 * 1975 * I think that *logical* block position is probably okay- 1976 * but hardware block position might have to wait for data 1977 * to hit media to be valid. Caveat Emptor. 1978 */ 1979 1980 if (hard && (st->flags & ST_WRITTEN)) { 1981 /* 1982 * First flush any pending writes... 1983 */ 1984 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 1985 /* 1986 * The latter case is for 'write protected' tapes 1987 * which are too stupid to recognize a zero count 1988 * for writing filemarks as a no-op. 1989 */ 1990 if (error != 0 && error != EACCES && error != EROFS) 1991 return (error); 1992 } 1993 1994 memset(&cmd, 0, sizeof(cmd)); 1995 memset(&posdata, 0, sizeof(posdata)); 1996 cmd.opcode = READ_POSITION; 1997 if (hard) 1998 cmd.byte1 = 1; 1999 2000 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 2001 (void *)&posdata, sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, 2002 XS_CTL_SILENT | XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); 2003 2004 if (error == 0) { 2005 #if 0 2006 printf("posdata:"); 2007 for (hard = 0; hard < sizeof(posdata); hard++) 2008 printf("%02x ", posdata[hard] & 0xff); 2009 printf("\n"); 2010 #endif 2011 if (posdata[0] & 0x4) /* Block Position Unknown */ 2012 error = EINVAL; 2013 else 2014 *blkptr = _4btol(&posdata[4]); 2015 } 2016 return (error); 2017 } 2018 2019 static int 2020 st_setpos(struct st_softc *st, int hard, u_int32_t *blkptr) 2021 { 2022 int error; 2023 struct scsi_tape_locate cmd; 2024 2025 /* 2026 * We used to try and flush any buffered writes here. 2027 * Now we push this onto user applications to either 2028 * flush the pending writes themselves (via a zero count 2029 * WRITE FILEMARKS command) or they can trust their tape 2030 * drive to do this correctly for them. 2031 * 2032 * There are very ugly performance limitations otherwise. 2033 */ 2034 2035 memset(&cmd, 0, sizeof(cmd)); 2036 cmd.opcode = LOCATE; 2037 if (hard) 2038 cmd.byte2 = 1 << 2; 2039 _lto4b(*blkptr, cmd.blkaddr); 2040 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 2041 ST_RETRIES, ST_SPC_TIME, NULL, 0); 2042 /* 2043 * Note file && block number position now unknown (if 2044 * these things ever start being maintained in this driver) 2045 */ 2046 st->fileno = st->blkno = -1; 2047 return (error); 2048 } 2049 2050 2051 /* 2052 * Look at the returned sense and act on the error and determine 2053 * the unix error number to pass back..., 0 (== report no error), 2054 * -1 = retry the operation, -2 continue error processing. 2055 */ 2056 static int 2057 st_interpret_sense(struct scsipi_xfer *xs) 2058 { 2059 struct scsipi_periph *periph = xs->xs_periph; 2060 struct scsi_sense_data *sense = &xs->sense.scsi_sense; 2061 struct buf *bp = xs->bp; 2062 struct st_softc *st = (void *)periph->periph_dev; 2063 int retval = EJUSTRETURN; 2064 int doprint = ((xs->xs_control & XS_CTL_SILENT) == 0); 2065 u_int8_t key; 2066 int32_t info; 2067 2068 /* 2069 * If it isn't a extended or extended/deferred error, let 2070 * the generic code handle it. 2071 */ 2072 if (SSD_RCODE(sense->response_code) != SSD_RCODE_CURRENT && 2073 SSD_RCODE(sense->response_code) != SSD_RCODE_DEFERRED) 2074 return (retval); 2075 2076 if (sense->response_code & SSD_RCODE_VALID) 2077 info = _4btol(sense->info); 2078 else 2079 info = (st->flags & ST_FIXEDBLOCKS) ? 2080 xs->datalen / st->blksize : xs->datalen; 2081 key = SSD_SENSE_KEY(sense->flags); 2082 st->mt_erreg = key; 2083 st->asc = sense->asc; 2084 st->ascq = sense->ascq; 2085 st->mt_resid = (short) info; 2086 2087 if (key == SKEY_NOT_READY && st->asc == 0x4 && st->ascq == 0x1) { 2088 /* Not Ready, Logical Unit Is in Process Of Becoming Ready */ 2089 if (!callout_pending(&periph->periph_callout)) 2090 scsipi_periph_freeze(periph, 1); 2091 callout_reset(&periph->periph_callout, 2092 hz, scsipi_periph_timed_thaw, periph); 2093 return (ERESTART); 2094 } 2095 2096 /* 2097 * If the device is not open yet, let generic handle 2098 */ 2099 if ((periph->periph_flags & PERIPH_OPEN) == 0) { 2100 return (retval); 2101 } 2102 2103 xs->resid = info; 2104 if (st->flags & ST_FIXEDBLOCKS) { 2105 if (bp) { 2106 xs->resid *= st->blksize; 2107 st->last_io_resid = xs->resid; 2108 } else { 2109 st->last_ctl_resid = xs->resid; 2110 } 2111 if (key == SKEY_VOLUME_OVERFLOW) { 2112 st->flags |= ST_EIO_PENDING; 2113 if (bp) 2114 bp->b_resid = xs->resid; 2115 } else if (sense->flags & SSD_EOM) { 2116 if ((st->flags & ST_EARLYWARN) == 0) 2117 st->flags |= ST_EIO_PENDING; 2118 st->flags |= ST_EOM_PENDING; 2119 if (bp) { 2120 #if 0 2121 bp->b_resid = xs->resid; 2122 #else 2123 /* 2124 * Grotesque as it seems, the few times 2125 * I've actually seen a non-zero resid, 2126 * the tape drive actually lied and had 2127 * written all the data! 2128 */ 2129 bp->b_resid = 0; 2130 #endif 2131 } 2132 } 2133 if (sense->flags & SSD_FILEMARK) { 2134 st->flags |= ST_AT_FILEMARK; 2135 if (bp) 2136 bp->b_resid = xs->resid; 2137 if (st->fileno != (daddr_t) -1) { 2138 st->fileno++; 2139 st->blkno = 0; 2140 st->flags |= ST_POSUPDATED; 2141 } 2142 } 2143 if (sense->flags & SSD_ILI) { 2144 st->flags |= ST_EIO_PENDING; 2145 if (bp) 2146 bp->b_resid = xs->resid; 2147 if (sense->response_code & SSD_RCODE_VALID && 2148 (xs->xs_control & XS_CTL_SILENT) == 0) 2149 aprint_error_dev(&st->sc_dev, "block wrong size, %d blocks " 2150 "residual\n", info); 2151 2152 /* 2153 * This quirk code helps the drive read 2154 * the first tape block, regardless of 2155 * format. That is required for these 2156 * drives to return proper MODE SENSE 2157 * information. 2158 */ 2159 if ((st->quirks & ST_Q_SENSE_HELP) && 2160 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 2161 st->blksize -= 512; 2162 else if ((st->flags & ST_POSUPDATED) == 0) { 2163 if (st->blkno != (daddr_t) -1) { 2164 st->blkno += 2165 (xs->datalen / st->blksize); 2166 st->flags |= ST_POSUPDATED; 2167 } 2168 } 2169 } 2170 /* 2171 * If data wanted and no data was transferred, do it immediately 2172 */ 2173 if (xs->datalen && xs->resid >= xs->datalen) { 2174 if (st->flags & ST_EIO_PENDING) 2175 return (EIO); 2176 if (st->flags & ST_AT_FILEMARK) { 2177 if (bp) 2178 bp->b_resid = xs->resid; 2179 return (0); 2180 } 2181 } 2182 } else { /* must be variable mode */ 2183 if (bp) { 2184 st->last_io_resid = xs->resid; 2185 } else { 2186 st->last_ctl_resid = xs->resid; 2187 } 2188 if (sense->flags & SSD_EOM) { 2189 /* 2190 * The current semantics of this 2191 * driver requires EOM detection 2192 * to return EIO unless early 2193 * warning detection is enabled 2194 * for variable mode (this is always 2195 * on for fixed block mode). 2196 */ 2197 if (st->flags & ST_EARLYWARN) { 2198 st->flags |= ST_EOM_PENDING; 2199 retval = 0; 2200 } else { 2201 retval = EIO; 2202 /* 2203 * If we return an error we can't claim to 2204 * have transfered all data. 2205 */ 2206 if (xs->resid == 0) 2207 xs->resid = xs->datalen; 2208 } 2209 2210 /* 2211 * If it's an unadorned EOM detection, 2212 * suppress printing an error. 2213 */ 2214 if (key == SKEY_NO_SENSE) { 2215 doprint = 0; 2216 } 2217 } else if (sense->flags & SSD_FILEMARK) { 2218 retval = 0; 2219 if (st->fileno != (daddr_t) -1) { 2220 st->fileno++; 2221 st->blkno = 0; 2222 st->flags |= ST_POSUPDATED; 2223 } 2224 } else if (sense->flags & SSD_ILI) { 2225 if (info < 0) { 2226 /* 2227 * The tape record was bigger than the read 2228 * we issued. 2229 */ 2230 if ((xs->xs_control & XS_CTL_SILENT) == 0) { 2231 aprint_error_dev(&st->sc_dev, 2232 "%d-byte tape record too big" 2233 " for %d-byte user buffer\n", 2234 xs->datalen - info, xs->datalen); 2235 } 2236 retval = EIO; 2237 } else { 2238 retval = 0; 2239 if (st->blkno != (daddr_t) -1) { 2240 st->blkno++; 2241 st->flags |= ST_POSUPDATED; 2242 } 2243 } 2244 } 2245 if (bp) 2246 bp->b_resid = xs->resid; 2247 } 2248 2249 #ifndef SCSIPI_DEBUG 2250 if (retval == 0 && key == SKEY_NO_SENSE) 2251 doprint = 0; 2252 #endif 2253 if (key == SKEY_BLANK_CHECK) { 2254 /* 2255 * This quirk code helps the drive read the 2256 * first tape block, regardless of format. That 2257 * is required for these drives to return proper 2258 * MODE SENSE information. 2259 */ 2260 if ((st->quirks & ST_Q_SENSE_HELP) && 2261 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 2262 /* still starting */ 2263 st->blksize -= 512; 2264 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 2265 st->flags |= ST_BLANK_READ; 2266 xs->resid = xs->datalen; 2267 if (bp) { 2268 bp->b_resid = xs->resid; 2269 /* return an EOF */ 2270 } 2271 retval = 0; 2272 /* lost position */ 2273 st->fileno = st->blkno = -1; 2274 } 2275 } 2276 2277 /* 2278 * If generic sense processing will continue, we should not 2279 * print sense info here. 2280 */ 2281 if (retval == EJUSTRETURN) 2282 doprint = 0; 2283 2284 if (doprint) { 2285 #ifdef SCSIVERBOSE 2286 scsipi_print_sense(xs, 0); 2287 #else 2288 scsipi_printaddr(periph); 2289 printf("Sense Key 0x%02x", key); 2290 if ((sense->response_code & SSD_RCODE_VALID) != 0) { 2291 switch (key) { 2292 case SKEY_NOT_READY: 2293 case SKEY_ILLEGAL_REQUEST: 2294 case SKEY_UNIT_ATTENTION: 2295 case SKEY_DATA_PROTECT: 2296 break; 2297 case SKEY_VOLUME_OVERFLOW: 2298 case SKEY_BLANK_CHECK: 2299 printf(", requested size: %d (decimal)", info); 2300 break; 2301 case SKEY_ABORTED_COMMAND: 2302 if (xs->xs_retries) 2303 printf(", retrying"); 2304 printf(", cmd 0x%x, info 0x%x", 2305 xs->cmd->opcode, info); 2306 break; 2307 default: 2308 printf(", info = %d (decimal)", info); 2309 } 2310 } 2311 if (sense->extra_len != 0) { 2312 int n; 2313 printf(", data ="); 2314 for (n = 0; n < sense->extra_len; n++) 2315 printf(" %02x", sense->csi[n]); 2316 } 2317 printf("\n"); 2318 #endif 2319 } 2320 return (retval); 2321 } 2322 2323 /* 2324 * The quirk here is that the drive returns some value to st_mode_sense 2325 * incorrectly until the tape has actually passed by the head. 2326 * 2327 * The method is to set the drive to large fixed-block state (user-specified 2328 * density and 1024-byte blocks), then read and rewind to get it to sense the 2329 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 2330 * work, as a last resort, try variable- length blocks. The result will be 2331 * the ability to do an accurate st_mode_sense. 2332 * 2333 * We know we can do a rewind because we just did a load, which implies rewind. 2334 * Rewind seems preferable to space backward if we have a virgin tape. 2335 * 2336 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 2337 * error processing, both part of st_interpret_sense. 2338 */ 2339 static int 2340 st_touch_tape(struct st_softc *st) 2341 { 2342 char *bf; 2343 int readsize; 2344 int error; 2345 2346 bf = malloc(1024, M_TEMP, M_NOWAIT); 2347 if (bf == NULL) 2348 return (ENOMEM); 2349 2350 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 2351 goto bad; 2352 2353 /* 2354 * If the block size is already known from the 2355 * sense data, use it. Else start probing at 1024. 2356 */ 2357 if (st->media_blksize > 0) 2358 st->blksize = st->media_blksize; 2359 else 2360 st->blksize = 1024; 2361 2362 do { 2363 switch (st->blksize) { 2364 case 512: 2365 case 1024: 2366 readsize = st->blksize; 2367 st->flags |= ST_FIXEDBLOCKS; 2368 break; 2369 default: 2370 readsize = 1; 2371 st->flags &= ~ST_FIXEDBLOCKS; 2372 } 2373 if ((error = st->ops(st, ST_OPS_MODESELECT, XS_CTL_SILENT)) 2374 != 0) { 2375 /* 2376 * The device did not agree with the proposed 2377 * block size. If we exhausted our options, 2378 * return failure, else try another. 2379 */ 2380 if (readsize == 1) 2381 goto bad; 2382 st->blksize -= 512; 2383 continue; 2384 } 2385 st_read(st, bf, readsize, XS_CTL_SILENT); /* XXX */ 2386 if ((error = st_rewind(st, 0, 0)) != 0) { 2387 bad: free(bf, M_TEMP); 2388 return (error); 2389 } 2390 } while (readsize != 1 && readsize > st->blksize); 2391 2392 free(bf, M_TEMP); 2393 return (0); 2394 } 2395 2396 static int 2397 stdump(dev_t dev, daddr_t blkno, void *va, 2398 size_t size) 2399 { 2400 2401 /* Not implemented. */ 2402 return (ENXIO); 2403 }
Cache object: 364fe8dab9349fde36812812fa43d601
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