st.c revision 1.195
1 /* $NetBSD: st.c,v 1.195 2007/03/01 17:31:36 thorpej 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 (at) 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 (at) tfs.com) Sept 1992 54 * major changes by Julian Elischer (julian (at) jules.dialix.oz.au) May 1993 55 * 56 * A lot of rewhacking done by mjacob (mjacob (at) nas.nasa.gov). 57 */ 58 59 #include <sys/cdefs.h> 60 __KERNEL_RCSID(0, "$NetBSD: st.c,v 1.195 2007/03/01 17:31:36 thorpej 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 #ifndef ST_MOUNT_DELAY 104 #define ST_MOUNT_DELAY 0 105 #endif 106 107 static dev_type_open(stopen); 108 static dev_type_close(stclose); 109 static dev_type_read(stread); 110 static dev_type_write(stwrite); 111 static dev_type_ioctl(stioctl); 112 static dev_type_strategy(ststrategy); 113 static dev_type_dump(stdump); 114 115 const struct bdevsw st_bdevsw = { 116 stopen, stclose, ststrategy, stioctl, stdump, nosize, D_TAPE 117 }; 118 119 const struct cdevsw st_cdevsw = { 120 stopen, stclose, stread, stwrite, stioctl, 121 nostop, notty, nopoll, nommap, nokqfilter, D_TAPE 122 }; 123 124 /* 125 * Define various devices that we know mis-behave in some way, 126 * and note how they are bad, so we can correct for them 127 */ 128 129 static const struct st_quirk_inquiry_pattern st_quirk_patterns[] = { 130 {{T_SEQUENTIAL, T_REMOV, 131 " ", " ", " "}, {0, 0, { 132 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 133 {ST_Q_FORCE_BLKSIZE, 512, QIC_24}, /* minor 4-7 */ 134 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_1600}, /* minor 8-11 */ 135 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_6250} /* minor 12-15 */ 136 }}}, 137 {{T_SEQUENTIAL, T_REMOV, 138 "TANDBERG", " TDC 3600 ", ""}, {0, 12, { 139 {0, 0, 0}, /* minor 0-3 */ 140 {ST_Q_FORCE_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 141 {0, 0, QIC_150}, /* minor 8-11 */ 142 {0, 0, QIC_120} /* minor 12-15 */ 143 }}}, 144 {{T_SEQUENTIAL, T_REMOV, 145 "TANDBERG", " TDC 3800 ", ""}, {0, 0, { 146 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 147 {0, 0, QIC_525}, /* minor 4-7 */ 148 {0, 0, QIC_150}, /* minor 8-11 */ 149 {0, 0, QIC_120} /* minor 12-15 */ 150 }}}, 151 {{T_SEQUENTIAL, T_REMOV, 152 "TANDBERG", " SLR5 4/8GB ", ""}, {0, 0, { 153 {ST_Q_FORCE_BLKSIZE, 1024, 0}, /* minor 0-3 */ 154 {0, 0, 0}, /* minor 4-7 */ 155 {0, 0, 0}, /* minor 8-11 */ 156 {0, 0, 0} /* minor 12-15 */ 157 }}}, 158 /* 159 * lacking a manual for the 4200, it's not clear what the 160 * specific density codes should be- the device is a 2.5GB 161 * capable QIC drive, those density codes aren't readily 162 * availabel. The 'default' will just have to do. 163 */ 164 {{T_SEQUENTIAL, T_REMOV, 165 "TANDBERG", " TDC 4200 ", ""}, {0, 0, { 166 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 167 {0, 0, QIC_525}, /* minor 4-7 */ 168 {0, 0, QIC_150}, /* minor 8-11 */ 169 {0, 0, QIC_120} /* minor 12-15 */ 170 }}}, 171 /* 172 * At least -005 and -007 need this. I'll assume they all do unless I 173 * hear otherwise. - mycroft, 31MAR1994 174 */ 175 {{T_SEQUENTIAL, T_REMOV, 176 "ARCHIVE ", "VIPER 2525 25462", ""}, {0, 0, { 177 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 178 {ST_Q_SENSE_HELP, 0, QIC_525}, /* minor 4-7 */ 179 {0, 0, QIC_150}, /* minor 8-11 */ 180 {0, 0, QIC_120} /* minor 12-15 */ 181 }}}, 182 /* 183 * One user reports that this works for his tape drive. It probably 184 * needs more work. - mycroft, 09APR1994 185 */ 186 {{T_SEQUENTIAL, T_REMOV, 187 "SANKYO ", "CP525 ", ""}, {0, 0, { 188 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 189 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 190 {0, 0, QIC_150}, /* minor 8-11 */ 191 {0, 0, QIC_120} /* minor 12-15 */ 192 }}}, 193 {{T_SEQUENTIAL, T_REMOV, 194 "ANRITSU ", "DMT780 ", ""}, {0, 0, { 195 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 196 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 197 {0, 0, QIC_150}, /* minor 8-11 */ 198 {0, 0, QIC_120} /* minor 12-15 */ 199 }}}, 200 {{T_SEQUENTIAL, T_REMOV, 201 "ARCHIVE ", "VIPER 150 21247", ""}, {ST_Q_ERASE_NOIMM, 12, { 202 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 203 {0, 0, QIC_150}, /* minor 4-7 */ 204 {0, 0, QIC_120}, /* minor 8-11 */ 205 {0, 0, QIC_24} /* minor 12-15 */ 206 }}}, 207 {{T_SEQUENTIAL, T_REMOV, 208 "ARCHIVE ", "VIPER 150 21531", ""}, {ST_Q_ERASE_NOIMM, 12, { 209 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 210 {0, 0, QIC_150}, /* minor 4-7 */ 211 {0, 0, QIC_120}, /* minor 8-11 */ 212 {0, 0, QIC_24} /* minor 12-15 */ 213 }}}, 214 {{T_SEQUENTIAL, T_REMOV, 215 "WANGTEK ", "5099ES SCSI", ""}, {0, 0, { 216 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 217 {0, 0, QIC_11}, /* minor 4-7 */ 218 {0, 0, QIC_24}, /* minor 8-11 */ 219 {0, 0, QIC_24} /* minor 12-15 */ 220 }}}, 221 {{T_SEQUENTIAL, T_REMOV, 222 "WANGTEK ", "5150ES SCSI", ""}, {0, 0, { 223 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 224 {0, 0, QIC_24}, /* minor 4-7 */ 225 {0, 0, QIC_120}, /* minor 8-11 */ 226 {0, 0, QIC_150} /* minor 12-15 */ 227 }}}, 228 {{T_SEQUENTIAL, T_REMOV, 229 "WANGTEK ", "5525ES SCSI REV7", ""}, {0, 0, { 230 {0, 0, 0}, /* minor 0-3 */ 231 {ST_Q_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 232 {0, 0, QIC_150}, /* minor 8-11 */ 233 {0, 0, QIC_120} /* minor 12-15 */ 234 }}}, 235 {{T_SEQUENTIAL, T_REMOV, 236 "WangDAT ", "Model 1300 ", ""}, {0, 0, { 237 {0, 0, 0}, /* minor 0-3 */ 238 {ST_Q_FORCE_BLKSIZE, 512, DDS}, /* minor 4-7 */ 239 {ST_Q_FORCE_BLKSIZE, 1024, DDS}, /* minor 8-11 */ 240 {ST_Q_FORCE_BLKSIZE, 0, DDS} /* minor 12-15 */ 241 }}}, 242 {{T_SEQUENTIAL, T_REMOV, 243 "EXABYTE ", "EXB-8200 ", "263H"}, {0, 5, { 244 {0, 0, 0}, /* minor 0-3 */ 245 {0, 0, 0}, /* minor 4-7 */ 246 {0, 0, 0}, /* minor 8-11 */ 247 {0, 0, 0} /* minor 12-15 */ 248 }}}, 249 {{T_SEQUENTIAL, T_REMOV, 250 "STK", "9490", ""}, 251 {ST_Q_FORCE_BLKSIZE, 0, { 252 {0, 0, 0}, /* minor 0-3 */ 253 {0, 0, 0}, /* minor 4-7 */ 254 {0, 0, 0}, /* minor 8-11 */ 255 {0, 0, 0} /* minor 12-15 */ 256 }}}, 257 {{T_SEQUENTIAL, T_REMOV, 258 "STK", "SD-3", ""}, 259 {ST_Q_FORCE_BLKSIZE, 0, { 260 {0, 0, 0}, /* minor 0-3 */ 261 {0, 0, 0}, /* minor 4-7 */ 262 {0, 0, 0}, /* minor 8-11 */ 263 {0, 0, 0} /* minor 12-15 */ 264 }}}, 265 {{T_SEQUENTIAL, T_REMOV, 266 "IBM", "03590", ""}, {ST_Q_IGNORE_LOADS, 0, { 267 {0, 0, 0}, /* minor 0-3 */ 268 {0, 0, 0}, /* minor 4-7 */ 269 {0, 0, 0}, /* minor 8-11 */ 270 {0, 0, 0} /* minor 12-15 */ 271 }}}, 272 {{T_SEQUENTIAL, T_REMOV, 273 "HP ", "T4000s ", ""}, {ST_Q_UNIMODAL, 0, { 274 {0, 0, QIC_3095}, /* minor 0-3 */ 275 {0, 0, QIC_3095}, /* minor 4-7 */ 276 {0, 0, QIC_3095}, /* minor 8-11 */ 277 {0, 0, QIC_3095}, /* minor 12-15 */ 278 }}}, 279 #if 0 280 {{T_SEQUENTIAL, T_REMOV, 281 "EXABYTE ", "EXB-8200 ", ""}, {0, 12, { 282 {0, 0, 0}, /* minor 0-3 */ 283 {0, 0, 0}, /* minor 4-7 */ 284 {0, 0, 0}, /* minor 8-11 */ 285 {0, 0, 0} /* minor 12-15 */ 286 }}}, 287 #endif 288 {{T_SEQUENTIAL, T_REMOV, 289 "TEAC ", "MT-2ST/N50 ", ""}, {ST_Q_IGNORE_LOADS, 0, { 290 {0, 0, 0}, /* minor 0-3 */ 291 {0, 0, 0}, /* minor 4-7 */ 292 {0, 0, 0}, /* minor 8-11 */ 293 {0, 0, 0} /* minor 12-15 */ 294 }}}, 295 {{T_SEQUENTIAL, T_REMOV, 296 "OnStream", "ADR50 Drive", ""}, {ST_Q_UNIMODAL, 0, { 297 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 298 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 4-7 */ 299 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 8-11 */ 300 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 12-15 */ 301 }}}, 302 {{T_SEQUENTIAL, T_REMOV, 303 "OnStream DI-30", "", "1.0"}, {ST_Q_NOFILEMARKS, 0, { 304 {0, 0, 0}, /* minor 0-3 */ 305 {0, 0, 0}, /* minor 4-7 */ 306 {0, 0, 0}, /* minor 8-11 */ 307 {0, 0, 0} /* minor 12-15 */ 308 }}}, 309 {{T_SEQUENTIAL, T_REMOV, 310 "NCR H621", "0-STD-03-46F880 ", ""}, {ST_Q_NOPREVENT, 0, { 311 {0, 0, 0}, /* minor 0-3 */ 312 {0, 0, 0}, /* minor 4-7 */ 313 {0, 0, 0}, /* minor 8-11 */ 314 {0, 0, 0} /* minor 12-15 */ 315 }}}, 316 }; 317 318 #define NOEJECT 0 319 #define EJECT 1 320 321 static void st_identify_drive(struct st_softc *, 322 struct scsipi_inquiry_pattern *); 323 static void st_loadquirks(struct st_softc *); 324 static int st_mount_tape(dev_t, int); 325 static void st_unmount(struct st_softc *, boolean); 326 static int st_decide_mode(struct st_softc *, boolean); 327 static void ststart(struct scsipi_periph *); 328 static void strestart(void *); 329 static void stdone(struct scsipi_xfer *, int); 330 static int st_read(struct st_softc *, char *, int, int); 331 static int st_space(struct st_softc *, int, u_int, int); 332 static int st_write_filemarks(struct st_softc *, int, int); 333 static int st_check_eod(struct st_softc *, boolean, int *, int); 334 static int st_load(struct st_softc *, u_int, int); 335 static int st_rewind(struct st_softc *, u_int, int); 336 static int st_interpret_sense(struct scsipi_xfer *); 337 static int st_touch_tape(struct st_softc *); 338 static int st_erase(struct st_softc *, int full, int flags); 339 static int st_rdpos(struct st_softc *, int, u_int32_t *); 340 static int st_setpos(struct st_softc *, int, u_int32_t *); 341 342 static const struct scsipi_periphsw st_switch = { 343 st_interpret_sense, 344 ststart, 345 NULL, 346 stdone 347 }; 348 349 #if defined(ST_ENABLE_EARLYWARN) 350 #define ST_INIT_FLAGS ST_EARLYWARN 351 #else 352 #define ST_INIT_FLAGS 0 353 #endif 354 355 /* 356 * The routine called by the low level scsi routine when it discovers 357 * A device suitable for this driver 358 */ 359 void 360 stattach(struct device *parent, struct st_softc *st, void *aux) 361 { 362 struct scsipibus_attach_args *sa = aux; 363 struct scsipi_periph *periph = sa->sa_periph; 364 365 SC_DEBUG(periph, SCSIPI_DB2, ("stattach: ")); 366 367 /* 368 * Store information needed to contact our base driver 369 */ 370 st->sc_periph = periph; 371 periph->periph_dev = &st->sc_dev; 372 periph->periph_switch = &st_switch; 373 374 /* 375 * Set initial flags 376 */ 377 378 st->flags = ST_INIT_FLAGS; 379 380 /* 381 * Set up the buf queue for this device 382 */ 383 bufq_alloc(&st->buf_queue, "fcfs", 0); 384 385 callout_init(&st->sc_callout); 386 387 /* 388 * Check if the drive is a known criminal and take 389 * Any steps needed to bring it into line 390 */ 391 st_identify_drive(st, &sa->sa_inqbuf); 392 /* 393 * Use the subdriver to request information regarding the drive. 394 */ 395 printf("\n"); 396 printf("%s: %s", st->sc_dev.dv_xname, st->quirkdata ? "quirks apply, " : ""); 397 if (scsipi_test_unit_ready(periph, 398 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE) || 399 st->ops(st, ST_OPS_MODESENSE, 400 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE)) 401 printf("drive empty\n"); 402 else { 403 printf("density code %d, ", st->media_density); 404 if (st->media_blksize > 0) 405 printf("%d-byte", st->media_blksize); 406 else 407 printf("variable"); 408 printf(" blocks, write-%s\n", 409 (st->flags & ST_READONLY) ? "protected" : "enabled"); 410 } 411 412 st->stats = iostat_alloc(IOSTAT_TAPE, parent, st->sc_dev.dv_xname); 413 414 #if NRND > 0 415 rnd_attach_source(&st->rnd_source, st->sc_dev.dv_xname, 416 RND_TYPE_TAPE, 0); 417 #endif 418 } 419 420 int 421 stactivate(struct device *self, enum devact act) 422 { 423 int rv = 0; 424 425 switch (act) { 426 case DVACT_ACTIVATE: 427 rv = EOPNOTSUPP; 428 break; 429 430 case DVACT_DEACTIVATE: 431 /* 432 * Nothing to do; we key off the device's DVF_ACTIVE. 433 */ 434 break; 435 } 436 return (rv); 437 } 438 439 int 440 stdetach(struct device *self, int flags) 441 { 442 struct st_softc *st = device_private(self); 443 int s, bmaj, cmaj, mn; 444 445 /* locate the major number */ 446 bmaj = bdevsw_lookup_major(&st_bdevsw); 447 cmaj = cdevsw_lookup_major(&st_cdevsw); 448 449 /* kill any pending restart */ 450 callout_stop(&st->sc_callout); 451 452 s = splbio(); 453 454 /* Kill off any queued buffers. */ 455 bufq_drain(st->buf_queue); 456 457 bufq_free(st->buf_queue); 458 459 /* Kill off any pending commands. */ 460 scsipi_kill_pending(st->sc_periph); 461 462 splx(s); 463 464 /* Nuke the vnodes for any open instances */ 465 mn = STUNIT(device_unit(self)); 466 vdevgone(bmaj, mn, mn+STNMINOR-1, VBLK); 467 vdevgone(cmaj, mn, mn+STNMINOR-1, VCHR); 468 469 iostat_free(st->stats); 470 471 #if NRND > 0 472 /* Unhook the entropy source. */ 473 rnd_detach_source(&st->rnd_source); 474 #endif 475 476 return (0); 477 } 478 479 /* 480 * Use the inquiry routine in 'scsi_base' to get drive info so we can 481 * Further tailor our behaviour. 482 */ 483 static void 484 st_identify_drive(struct st_softc *st, struct scsipi_inquiry_pattern *inqbuf) 485 { 486 const struct st_quirk_inquiry_pattern *finger; 487 int priority; 488 489 finger = scsipi_inqmatch(inqbuf, 490 st_quirk_patterns, 491 sizeof(st_quirk_patterns) / sizeof(st_quirk_patterns[0]), 492 sizeof(st_quirk_patterns[0]), &priority); 493 if (priority != 0) { 494 st->quirkdata = &finger->quirkdata; 495 st->drive_quirks = finger->quirkdata.quirks; 496 st->quirks = finger->quirkdata.quirks; /* start value */ 497 st->page_0_size = finger->quirkdata.page_0_size; 498 st_loadquirks(st); 499 } 500 } 501 502 /* 503 * initialise the subdevices to the default (QUIRK) state. 504 * this will remove any setting made by the system operator or previous 505 * operations. 506 */ 507 static void 508 st_loadquirks(struct st_softc *st) 509 { 510 int i; 511 const struct modes *mode; 512 struct modes *mode2; 513 514 mode = st->quirkdata->modes; 515 mode2 = st->modes; 516 for (i = 0; i < 4; i++) { 517 memset(mode2, 0, sizeof(struct modes)); 518 st->modeflags[i] &= ~(BLKSIZE_SET_BY_QUIRK | 519 DENSITY_SET_BY_QUIRK | BLKSIZE_SET_BY_USER | 520 DENSITY_SET_BY_USER); 521 if ((mode->quirks | st->drive_quirks) & ST_Q_FORCE_BLKSIZE) { 522 mode2->blksize = mode->blksize; 523 st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; 524 } 525 if (mode->density) { 526 mode2->density = mode->density; 527 st->modeflags[i] |= DENSITY_SET_BY_QUIRK; 528 } 529 mode2->quirks |= mode->quirks; 530 mode++; 531 mode2++; 532 } 533 } 534 535 /* 536 * open the device. 537 */ 538 static int 539 stopen(dev_t dev, int flags, int mode, struct lwp *l) 540 { 541 u_int stmode, dsty; 542 int error, sflags, unit, tries, ntries; 543 struct st_softc *st; 544 struct scsipi_periph *periph; 545 struct scsipi_adapter *adapt; 546 547 unit = STUNIT(dev); 548 if (unit >= st_cd.cd_ndevs) 549 return (ENXIO); 550 st = st_cd.cd_devs[unit]; 551 if (st == NULL) 552 return (ENXIO); 553 554 stmode = STMODE(dev); 555 dsty = STDSTY(dev); 556 557 periph = st->sc_periph; 558 adapt = periph->periph_channel->chan_adapter; 559 560 SC_DEBUG(periph, SCSIPI_DB1, ("open: dev=0x%x (unit %d (of %d))\n", dev, 561 unit, st_cd.cd_ndevs)); 562 563 564 /* 565 * Only allow one at a time 566 */ 567 if (periph->periph_flags & PERIPH_OPEN) { 568 printf("%s: already open\n", st->sc_dev.dv_xname); 569 return (EBUSY); 570 } 571 572 if ((error = scsipi_adapter_addref(adapt)) != 0) 573 return (error); 574 575 /* 576 * clear any latched errors. 577 */ 578 st->mt_resid = 0; 579 st->mt_erreg = 0; 580 st->asc = 0; 581 st->ascq = 0; 582 583 /* 584 * Catch any unit attention errors. Be silent about this 585 * unless we're already mounted. We ignore media change 586 * if we're in control mode or not mounted yet. 587 */ 588 if ((st->flags & ST_MOUNTED) == 0 || stmode == CTRL_MODE) { 589 #ifdef SCSIDEBUG 590 sflags = XS_CTL_IGNORE_MEDIA_CHANGE; 591 #else 592 sflags = XS_CTL_SILENT|XS_CTL_IGNORE_MEDIA_CHANGE; 593 #endif 594 } else 595 sflags = 0; 596 597 /* 598 * If we're already mounted or we aren't configured for 599 * a mount delay, only try a test unit ready once. Otherwise, 600 * try up to ST_MOUNT_DELAY times with a rest interval of 601 * one second between each try. 602 */ 603 604 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0) { 605 ntries = 1; 606 } else { 607 ntries = ST_MOUNT_DELAY; 608 } 609 610 for (error = tries = 0; tries < ntries; tries++) { 611 int slpintr, oflags; 612 613 /* 614 * If we had no error, or we're opening the control mode 615 * device, we jump out right away. 616 */ 617 618 error = scsipi_test_unit_ready(periph, sflags); 619 if (error == 0 || stmode == CTRL_MODE) { 620 break; 621 } 622 623 /* 624 * We had an error. 625 * 626 * If we're already mounted or we aren't configured for 627 * a mount delay, or the error isn't a NOT READY error, 628 * skip to the error exit now. 629 */ 630 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0 || 631 (st->mt_key != SKEY_NOT_READY)) { 632 goto bad; 633 } 634 635 /* 636 * clear any latched errors. 637 */ 638 st->mt_resid = 0; 639 st->mt_erreg = 0; 640 st->asc = 0; 641 st->ascq = 0; 642 643 /* 644 * Fake that we have the device open so 645 * we block other apps from getting in. 646 */ 647 648 oflags = periph->periph_flags; 649 periph->periph_flags |= PERIPH_OPEN; 650 651 slpintr = tsleep(&lbolt, PUSER|PCATCH, "stload", 0); 652 653 periph->periph_flags = oflags; /* restore flags */ 654 if (slpintr) { 655 goto bad; 656 } 657 } 658 659 660 /* 661 * If the mode is 3 (e.g. minor = 3,7,11,15) then the device has 662 * been opened to set defaults and perform other, usually non-I/O 663 * related, operations. In this case, do a quick check to see 664 * whether the unit actually had a tape loaded (this will be known 665 * as to whether or not we got a NOT READY for the above 666 * unit attention). If a tape is there, go do a mount sequence. 667 */ 668 if (stmode == CTRL_MODE && st->mt_key == SKEY_NOT_READY) { 669 periph->periph_flags |= PERIPH_OPEN; 670 return (0); 671 } 672 673 /* 674 * If we get this far and had an error set, that means we failed 675 * to pass the 'test unit ready' test for the non-controlmode device, 676 * so we bounce the open. 677 */ 678 679 if (error) 680 return (error); 681 682 /* 683 * Else, we're now committed to saying we're open. 684 */ 685 686 periph->periph_flags |= PERIPH_OPEN; /* unit attn are now errors */ 687 688 /* 689 * If it's a different mode, or if the media has been 690 * invalidated, unmount the tape from the previous 691 * session but continue with open processing 692 */ 693 if (st->last_dsty != dsty || 694 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 695 st_unmount(st, NOEJECT); 696 697 /* 698 * If we are not mounted, then we should start a new 699 * mount session. 700 */ 701 if (!(st->flags & ST_MOUNTED)) { 702 if ((error = st_mount_tape(dev, flags)) != 0) 703 goto bad; 704 st->last_dsty = dsty; 705 } 706 if (!(st->quirks & ST_Q_NOPREVENT)) { 707 scsipi_prevent(periph, SPAMR_PREVENT_DT, 708 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 709 } 710 711 SC_DEBUG(periph, SCSIPI_DB2, ("open complete\n")); 712 return (0); 713 714 bad: 715 st_unmount(st, NOEJECT); 716 scsipi_adapter_delref(adapt); 717 periph->periph_flags &= ~PERIPH_OPEN; 718 return (error); 719 } 720 721 /* 722 * close the device.. only called if we are the LAST 723 * occurence of an open device 724 */ 725 static int 726 stclose(dev_t dev, int flags, int mode, struct lwp *l) 727 { 728 int stxx, error = 0; 729 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 730 struct scsipi_periph *periph = st->sc_periph; 731 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 732 733 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("closing\n")); 734 735 /* 736 * Make sure that a tape opened in write-only mode will have 737 * file marks written on it when closed, even if not written to. 738 * 739 * This is for SUN compatibility. Actually, the Sun way of 740 * things is to: 741 * 742 * only write filemarks if there are fmks to be written and 743 * - open for write (possibly read/write) 744 * - the last operation was a write 745 * or: 746 * - opened for wronly 747 * - no data was written (including filemarks) 748 */ 749 750 stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); 751 if (((flags & FWRITE) && stxx == ST_WRITTEN) || 752 ((flags & O_ACCMODE) == FWRITE && stxx == 0)) { 753 int nm; 754 error = st_check_eod(st, FALSE, &nm, 0); 755 } 756 757 /* 758 * Allow robots to eject tape if needed. 759 */ 760 scsipi_prevent(periph, SPAMR_ALLOW, 761 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 762 763 switch (STMODE(dev)) { 764 case NORMAL_MODE: 765 st_unmount(st, NOEJECT); 766 break; 767 case NOREW_MODE: 768 case CTRL_MODE: 769 /* 770 * Leave mounted unless media seems to have been removed. 771 * 772 * Otherwise, if we're to terminate a tape with more than one 773 * filemark [ and because we're not rewinding here ], backspace 774 * one filemark so that later appends will see an unbroken 775 * sequence of: 776 * 777 * file - FMK - file - FMK ... file - FMK FMK (EOM) 778 */ 779 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 780 st_unmount(st, NOEJECT); 781 } else if (error == 0) { 782 /* 783 * ST_WRITTEN was preserved from above. 784 * 785 * All we need to know here is: 786 * 787 * Were we writing this tape and was the last 788 * operation a write? 789 * 790 * Are there supposed to be 2FM at EOD? 791 * 792 * If both statements are true, then we backspace 793 * one filemark. 794 */ 795 stxx |= (st->flags & ST_2FM_AT_EOD); 796 if ((flags & FWRITE) != 0 && 797 (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { 798 error = st_space(st, -1, SP_FILEMARKS, 0); 799 } 800 } 801 break; 802 case EJECT_MODE: 803 st_unmount(st, EJECT); 804 break; 805 } 806 807 scsipi_wait_drain(periph); 808 809 scsipi_adapter_delref(adapt); 810 periph->periph_flags &= ~PERIPH_OPEN; 811 812 return (error); 813 } 814 815 /* 816 * Start a new mount session. 817 * Copy in all the default parameters from the selected device mode. 818 * and try guess any that seem to be defaulted. 819 */ 820 static int 821 st_mount_tape(dev_t dev, int flags) 822 { 823 int unit; 824 u_int dsty; 825 struct st_softc *st; 826 struct scsipi_periph *periph; 827 int error = 0; 828 829 unit = STUNIT(dev); 830 dsty = STDSTY(dev); 831 st = st_cd.cd_devs[unit]; 832 periph = st->sc_periph; 833 834 if (st->flags & ST_MOUNTED) 835 return (0); 836 837 SC_DEBUG(periph, SCSIPI_DB1, ("mounting\n ")); 838 st->flags |= ST_NEW_MOUNT; 839 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 840 /* 841 * If the media is new, then make sure we give it a chance to 842 * to do a 'load' instruction. (We assume it is new.) 843 */ 844 if ((error = st_load(st, LD_LOAD, XS_CTL_SILENT)) != 0) 845 return (error); 846 /* 847 * Throw another dummy instruction to catch 848 * 'Unit attention' errors. Many drives give 849 * these after doing a Load instruction (with 850 * the MEDIUM MAY HAVE CHANGED asc/ascq). 851 */ 852 scsipi_test_unit_ready(periph, XS_CTL_SILENT); /* XXX */ 853 854 /* 855 * Some devices can't tell you much until they have been 856 * asked to look at the media. This quirk does this. 857 */ 858 if (st->quirks & ST_Q_SENSE_HELP) 859 if ((error = st_touch_tape(st)) != 0) 860 return (error); 861 /* 862 * Load the physical device parameters 863 * loads: blkmin, blkmax 864 */ 865 if ((error = st->ops(st, ST_OPS_RBL, 0)) != 0) 866 return (error); 867 /* 868 * Load the media dependent parameters 869 * includes: media_blksize,media_density,numblks 870 * As we have a tape in, it should be reflected here. 871 * If not you may need the "quirk" above. 872 */ 873 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 874 return (error); 875 /* 876 * If we have gained a permanent density from somewhere, 877 * then use it in preference to the one supplied by 878 * default by the driver. 879 */ 880 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 881 st->density = st->modes[dsty].density; 882 else 883 st->density = st->media_density; 884 /* 885 * If we have gained a permanent blocksize 886 * then use it in preference to the one supplied by 887 * default by the driver. 888 */ 889 st->flags &= ~ST_FIXEDBLOCKS; 890 if (st->modeflags[dsty] & 891 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 892 st->blksize = st->modes[dsty].blksize; 893 if (st->blksize) 894 st->flags |= ST_FIXEDBLOCKS; 895 } else { 896 if ((error = st_decide_mode(st, FALSE)) != 0) 897 return (error); 898 } 899 if ((error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 900 /* ATAPI will return ENODEV for this, and this may be OK */ 901 if (error != ENODEV) { 902 printf("%s: cannot set selected mode\n", 903 st->sc_dev.dv_xname); 904 return (error); 905 } 906 } 907 st->flags &= ~ST_NEW_MOUNT; 908 st->flags |= ST_MOUNTED; 909 periph->periph_flags |= PERIPH_MEDIA_LOADED; /* move earlier? */ 910 st->blkno = st->fileno = (daddr_t) 0; 911 return (0); 912 } 913 914 /* 915 * End the present mount session. 916 * Rewind, and optionally eject the tape. 917 * Reset various flags to indicate that all new 918 * operations require another mount operation 919 */ 920 static void 921 st_unmount(struct st_softc *st, boolean eject) 922 { 923 struct scsipi_periph *periph = st->sc_periph; 924 int nmarks; 925 926 if ((st->flags & ST_MOUNTED) == 0) 927 return; 928 SC_DEBUG(periph, SCSIPI_DB1, ("unmounting\n")); 929 st_check_eod(st, FALSE, &nmarks, XS_CTL_IGNORE_NOT_READY); 930 st_rewind(st, 0, XS_CTL_IGNORE_NOT_READY); 931 932 /* 933 * Section 9.3.3 of the SCSI specs states that a device shall return 934 * the density value specified in the last succesfull MODE SELECT 935 * after an unload operation, in case it is not able to 936 * automatically determine the density of the new medium. 937 * 938 * So we instruct the device to use the default density, which will 939 * prevent the use of stale density values (in particular, 940 * in st_touch_tape(). 941 */ 942 st->density = 0; 943 if (st->ops(st, ST_OPS_MODESELECT, 0) != 0) { 944 printf("%s: WARNING: cannot revert to default density\n", 945 st->sc_dev.dv_xname); 946 } 947 948 if (eject) { 949 if (!(st->quirks & ST_Q_NOPREVENT)) { 950 scsipi_prevent(periph, SPAMR_ALLOW, 951 XS_CTL_IGNORE_ILLEGAL_REQUEST | 952 XS_CTL_IGNORE_NOT_READY); 953 } 954 st_load(st, LD_UNLOAD, XS_CTL_IGNORE_NOT_READY); 955 st->blkno = st->fileno = (daddr_t) -1; 956 } else { 957 st->blkno = st->fileno = (daddr_t) 0; 958 } 959 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 960 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 961 } 962 963 /* 964 * Given all we know about the device, media, mode, 'quirks' and 965 * initial operation, make a decision as to how we should be set 966 * to run (regarding blocking and EOD marks) 967 */ 968 int 969 st_decide_mode(struct st_softc *st, boolean first_read) 970 { 971 972 SC_DEBUG(st->sc_periph, SCSIPI_DB2, ("starting block mode decision\n")); 973 974 /* 975 * If the drive can only handle fixed-length blocks and only at 976 * one size, perhaps we should just do that. 977 */ 978 if (st->blkmin && (st->blkmin == st->blkmax)) { 979 st->flags |= ST_FIXEDBLOCKS; 980 st->blksize = st->blkmin; 981 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 982 ("blkmin == blkmax of %d\n", st->blkmin)); 983 goto done; 984 } 985 /* 986 * If the tape density mandates (or even suggests) use of fixed 987 * or variable-length blocks, comply. 988 */ 989 switch (st->density) { 990 case HALFINCH_800: 991 case HALFINCH_1600: 992 case HALFINCH_6250: 993 case DDS: 994 st->flags &= ~ST_FIXEDBLOCKS; 995 st->blksize = 0; 996 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 997 ("density specified variable\n")); 998 goto done; 999 case QIC_11: 1000 case QIC_24: 1001 case QIC_120: 1002 case QIC_150: 1003 case QIC_525: 1004 case QIC_1320: 1005 case QIC_3095: 1006 case QIC_3220: 1007 st->flags |= ST_FIXEDBLOCKS; 1008 if (st->media_blksize > 0) 1009 st->blksize = st->media_blksize; 1010 else 1011 st->blksize = DEF_FIXED_BSIZE; 1012 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1013 ("density specified fixed\n")); 1014 goto done; 1015 } 1016 /* 1017 * If we're about to read the tape, perhaps we should choose 1018 * fixed or variable-length blocks and block size according to 1019 * what the drive found on the tape. 1020 */ 1021 if (first_read && 1022 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 1023 (st->media_blksize == DEF_FIXED_BSIZE) || 1024 (st->media_blksize == 1024))) { 1025 if (st->media_blksize > 0) 1026 st->flags |= ST_FIXEDBLOCKS; 1027 else 1028 st->flags &= ~ST_FIXEDBLOCKS; 1029 st->blksize = st->media_blksize; 1030 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1031 ("Used media_blksize of %d\n", st->media_blksize)); 1032 goto done; 1033 } 1034 /* 1035 * We're getting no hints from any direction. Choose variable- 1036 * length blocks arbitrarily. 1037 */ 1038 st->flags &= ~ST_FIXEDBLOCKS; 1039 st->blksize = 0; 1040 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1041 ("Give up and default to variable mode\n")); 1042 1043 done: 1044 /* 1045 * Decide whether or not to write two file marks to signify end- 1046 * of-data. Make the decision as a function of density. If 1047 * the decision is not to use a second file mark, the SCSI BLANK 1048 * CHECK condition code will be recognized as end-of-data when 1049 * first read. 1050 * (I think this should be a by-product of fixed/variable..julian) 1051 */ 1052 switch (st->density) { 1053 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 1054 case QIC_11: 1055 case QIC_24: 1056 case QIC_120: 1057 case QIC_150: 1058 case QIC_525: 1059 case QIC_1320: 1060 case QIC_3095: 1061 case QIC_3220: 1062 st->flags &= ~ST_2FM_AT_EOD; 1063 break; 1064 default: 1065 st->flags |= ST_2FM_AT_EOD; 1066 } 1067 return (0); 1068 } 1069 1070 /* 1071 * Actually translate the requested transfer into 1072 * one the physical driver can understand 1073 * The transfer is described by a buf and will include 1074 * only one physical transfer. 1075 */ 1076 static void 1077 ststrategy(struct buf *bp) 1078 { 1079 struct st_softc *st = st_cd.cd_devs[STUNIT(bp->b_dev)]; 1080 int s; 1081 1082 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1083 ("ststrategy %d bytes @ blk %" PRId64 "\n", bp->b_bcount, bp->b_blkno)); 1084 /* 1085 * If it's a null transfer, return immediatly 1086 */ 1087 if (bp->b_bcount == 0) 1088 goto done; 1089 1090 /* If offset is negative, error */ 1091 if (bp->b_blkno < 0) { 1092 bp->b_error = EINVAL; 1093 goto bad; 1094 } 1095 1096 /* 1097 * Odd sized request on fixed drives are verboten 1098 */ 1099 if (st->flags & ST_FIXEDBLOCKS) { 1100 if (bp->b_bcount % st->blksize) { 1101 printf("%s: bad request, must be multiple of %d\n", 1102 st->sc_dev.dv_xname, st->blksize); 1103 bp->b_error = EIO; 1104 goto bad; 1105 } 1106 } 1107 /* 1108 * as are out-of-range requests on variable drives. 1109 */ 1110 else if (bp->b_bcount < st->blkmin || 1111 (st->blkmax && bp->b_bcount > st->blkmax)) { 1112 printf("%s: bad request, must be between %d and %d\n", 1113 st->sc_dev.dv_xname, st->blkmin, st->blkmax); 1114 bp->b_error = EIO; 1115 goto bad; 1116 } 1117 s = splbio(); 1118 1119 /* 1120 * Place it in the queue of activities for this tape 1121 * at the end (a bit silly because we only have on user.. 1122 * (but it could fork())) 1123 */ 1124 BUFQ_PUT(st->buf_queue, bp); 1125 1126 /* 1127 * Tell the device to get going on the transfer if it's 1128 * not doing anything, otherwise just wait for completion 1129 * (All a bit silly if we're only allowing 1 open but..) 1130 */ 1131 ststart(st->sc_periph); 1132 1133 splx(s); 1134 return; 1135 bad: 1136 bp->b_flags |= B_ERROR; 1137 done: 1138 /* 1139 * Correctly set the buf to indicate a completed xfer 1140 */ 1141 bp->b_resid = bp->b_bcount; 1142 biodone(bp); 1143 return; 1144 } 1145 1146 /* 1147 * ststart looks to see if there is a buf waiting for the device 1148 * and that the device is not already busy. If both are true, 1149 * It dequeues the buf and creates a scsi command to perform the 1150 * transfer required. The transfer request will call scsipi_done 1151 * on completion, which will in turn call this routine again 1152 * so that the next queued transfer is performed. 1153 * The bufs are queued by the strategy routine (ststrategy) 1154 * 1155 * This routine is also called after other non-queued requests 1156 * have been made of the scsi driver, to ensure that the queue 1157 * continues to be drained. 1158 * ststart() is called at splbio 1159 */ 1160 static void 1161 ststart(struct scsipi_periph *periph) 1162 { 1163 struct st_softc *st = (void *)periph->periph_dev; 1164 struct buf *bp; 1165 struct scsi_rw_tape cmd; 1166 struct scsipi_xfer *xs; 1167 int flags, error; 1168 1169 SC_DEBUG(periph, SCSIPI_DB2, ("ststart ")); 1170 /* 1171 * See if there is a buf to do and we are not already 1172 * doing one 1173 */ 1174 while (periph->periph_active < periph->periph_openings) { 1175 /* if a special awaits, let it proceed first */ 1176 if (periph->periph_flags & PERIPH_WAITING) { 1177 periph->periph_flags &= ~PERIPH_WAITING; 1178 wakeup((caddr_t)periph); 1179 return; 1180 } 1181 1182 /* 1183 * If the device has been unmounted by the user 1184 * then throw away all requests until done. 1185 */ 1186 if (__predict_false((st->flags & ST_MOUNTED) == 0 || 1187 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0)) { 1188 if ((bp = BUFQ_GET(st->buf_queue)) != NULL) { 1189 /* make sure that one implies the other.. */ 1190 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 1191 bp->b_flags |= B_ERROR; 1192 bp->b_error = EIO; 1193 bp->b_resid = bp->b_bcount; 1194 biodone(bp); 1195 continue; 1196 } else { 1197 return; 1198 } 1199 } 1200 1201 if ((bp = BUFQ_PEEK(st->buf_queue)) == NULL) 1202 return; 1203 1204 iostat_busy(st->stats); 1205 1206 /* 1207 * only FIXEDBLOCK devices have pending I/O or space operations. 1208 */ 1209 if (st->flags & ST_FIXEDBLOCKS) { 1210 /* 1211 * If we are at a filemark but have not reported it yet 1212 * then we should report it now 1213 */ 1214 if (st->flags & ST_AT_FILEMARK) { 1215 if ((bp->b_flags & B_READ) == B_WRITE) { 1216 /* 1217 * Handling of ST_AT_FILEMARK in 1218 * st_space will fill in the right file 1219 * mark count. 1220 * Back up over filemark 1221 */ 1222 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1223 BUFQ_GET(st->buf_queue); 1224 bp->b_flags |= B_ERROR; 1225 bp->b_error = EIO; 1226 biodone(bp); 1227 continue; 1228 } 1229 } else { 1230 BUFQ_GET(st->buf_queue); 1231 bp->b_resid = bp->b_bcount; 1232 bp->b_error = 0; 1233 bp->b_flags &= ~B_ERROR; 1234 st->flags &= ~ST_AT_FILEMARK; 1235 biodone(bp); 1236 continue; /* seek more work */ 1237 } 1238 } 1239 } 1240 /* 1241 * If we are at EOM but have not reported it 1242 * yet then we should report it now. 1243 */ 1244 if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { 1245 BUFQ_GET(st->buf_queue); 1246 bp->b_resid = bp->b_bcount; 1247 if (st->flags & ST_EIO_PENDING) { 1248 bp->b_error = EIO; 1249 bp->b_flags |= B_ERROR; 1250 } 1251 st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); 1252 biodone(bp); 1253 continue; /* seek more work */ 1254 } 1255 1256 /* 1257 * Fill out the scsi command 1258 */ 1259 memset(&cmd, 0, sizeof(cmd)); 1260 flags = XS_CTL_NOSLEEP | XS_CTL_ASYNC; 1261 if ((bp->b_flags & B_READ) == B_WRITE) { 1262 cmd.opcode = WRITE; 1263 st->flags &= ~ST_FM_WRITTEN; 1264 flags |= XS_CTL_DATA_OUT; 1265 } else { 1266 cmd.opcode = READ; 1267 flags |= XS_CTL_DATA_IN; 1268 } 1269 1270 /* 1271 * Handle "fixed-block-mode" tape drives by using the 1272 * block count instead of the length. 1273 */ 1274 if (st->flags & ST_FIXEDBLOCKS) { 1275 cmd.byte2 |= SRW_FIXED; 1276 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1277 } else 1278 _lto3b(bp->b_bcount, cmd.len); 1279 1280 /* 1281 * Clear 'position updated' indicator 1282 */ 1283 st->flags &= ~ST_POSUPDATED; 1284 1285 /* 1286 * go ask the adapter to do all this for us 1287 */ 1288 xs = scsipi_make_xs(periph, 1289 (struct scsipi_generic *)&cmd, sizeof(cmd), 1290 (u_char *)bp->b_data, bp->b_bcount, 1291 0, ST_IO_TIME, bp, flags); 1292 if (__predict_false(xs == NULL)) { 1293 /* 1294 * out of memory. Keep this buffer in the queue, and 1295 * retry later. 1296 */ 1297 callout_reset(&st->sc_callout, hz / 2, strestart, 1298 periph); 1299 return; 1300 } 1301 /* 1302 * need to dequeue the buffer before queuing the command, 1303 * because cdstart may be called recursively from the 1304 * HBA driver 1305 */ 1306 #ifdef DIAGNOSTIC 1307 if (BUFQ_GET(st->buf_queue) != bp) 1308 panic("ststart(): dequeued wrong buf"); 1309 #else 1310 BUFQ_GET(st->buf_queue); 1311 #endif 1312 error = scsipi_execute_xs(xs); 1313 /* with a scsipi_xfer preallocated, scsipi_command can't fail */ 1314 KASSERT(error == 0); 1315 } /* go back and see if we can cram more work in.. */ 1316 } 1317 1318 static void 1319 strestart(void *v) 1320 { 1321 int s = splbio(); 1322 ststart((struct scsipi_periph *)v); 1323 splx(s); 1324 } 1325 1326 1327 static void 1328 stdone(struct scsipi_xfer *xs, int error) 1329 { 1330 struct st_softc *st = (void *)xs->xs_periph->periph_dev; 1331 struct buf *bp = xs->bp; 1332 1333 if (bp) { 1334 bp->b_error = error; 1335 bp->b_resid = xs->resid; 1336 if (error) 1337 bp->b_flags |= B_ERROR; 1338 1339 if ((bp->b_flags & B_READ) == B_WRITE) 1340 st->flags |= ST_WRITTEN; 1341 else 1342 st->flags &= ~ST_WRITTEN; 1343 1344 iostat_unbusy(st->stats, bp->b_bcount, 1345 ((bp->b_flags & B_READ) == B_READ)); 1346 1347 #if NRND > 0 1348 rnd_add_uint32(&st->rnd_source, bp->b_blkno); 1349 #endif 1350 1351 if ((st->flags & ST_POSUPDATED) == 0) { 1352 if (error) { 1353 st->fileno = st->blkno = -1; 1354 } else if (st->blkno != -1) { 1355 if (st->flags & ST_FIXEDBLOCKS) 1356 st->blkno += 1357 (bp->b_bcount / st->blksize); 1358 else 1359 st->blkno++; 1360 } 1361 } 1362 1363 biodone(bp); 1364 } 1365 } 1366 1367 static int 1368 stread(dev_t dev, struct uio *uio, int iomode) 1369 { 1370 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1371 1372 return (physio(ststrategy, NULL, dev, B_READ, 1373 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1374 } 1375 1376 static int 1377 stwrite(dev_t dev, struct uio *uio, int iomode) 1378 { 1379 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1380 1381 return (physio(ststrategy, NULL, dev, B_WRITE, 1382 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1383 } 1384 1385 /* 1386 * Perform special action on behalf of the user; 1387 * knows about the internals of this device 1388 */ 1389 static int 1390 stioctl(dev_t dev, u_long cmd, caddr_t arg, int flag, struct lwp *l) 1391 { 1392 int error = 0; 1393 int unit; 1394 int number, nmarks, dsty; 1395 int flags; 1396 struct st_softc *st; 1397 int hold_blksize; 1398 u_int8_t hold_density; 1399 struct mtop *mt = (struct mtop *) arg; 1400 1401 /* 1402 * Find the device that the user is talking about 1403 */ 1404 flags = 0; /* give error messages, act on errors etc. */ 1405 unit = STUNIT(dev); 1406 dsty = STDSTY(dev); 1407 st = st_cd.cd_devs[unit]; 1408 hold_blksize = st->blksize; 1409 hold_density = st->density; 1410 1411 switch ((u_int) cmd) { 1412 1413 case MTIOCGET: { 1414 struct mtget *g = (struct mtget *) arg; 1415 /* 1416 * (to get the current state of READONLY) 1417 */ 1418 error = st->ops(st, ST_OPS_MODESENSE, XS_CTL_SILENT); 1419 if (error) { 1420 /* 1421 * Ignore the error if in control mode; 1422 * this is mandated by st(4). 1423 */ 1424 if (STMODE(dev) != CTRL_MODE) 1425 break; 1426 error = 0; 1427 } 1428 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("[ioctl: get status]\n")); 1429 memset(g, 0, sizeof(struct mtget)); 1430 g->mt_type = 0x7; /* Ultrix compat *//*? */ 1431 g->mt_blksiz = st->blksize; 1432 g->mt_density = st->density; 1433 g->mt_mblksiz[0] = st->modes[0].blksize; 1434 g->mt_mblksiz[1] = st->modes[1].blksize; 1435 g->mt_mblksiz[2] = st->modes[2].blksize; 1436 g->mt_mblksiz[3] = st->modes[3].blksize; 1437 g->mt_mdensity[0] = st->modes[0].density; 1438 g->mt_mdensity[1] = st->modes[1].density; 1439 g->mt_mdensity[2] = st->modes[2].density; 1440 g->mt_mdensity[3] = st->modes[3].density; 1441 g->mt_fileno = st->fileno; 1442 g->mt_blkno = st->blkno; 1443 if (st->flags & ST_READONLY) 1444 g->mt_dsreg |= MT_DS_RDONLY; 1445 if (st->flags & ST_MOUNTED) 1446 g->mt_dsreg |= MT_DS_MOUNTED; 1447 g->mt_resid = st->mt_resid; 1448 g->mt_erreg = st->mt_erreg; 1449 /* 1450 * clear latched errors. 1451 */ 1452 st->mt_resid = 0; 1453 st->mt_erreg = 0; 1454 st->asc = 0; 1455 st->ascq = 0; 1456 break; 1457 } 1458 case MTIOCTOP: { 1459 1460 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1461 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1462 mt->mt_count)); 1463 1464 /* compat: in U*x it is a short */ 1465 number = mt->mt_count; 1466 switch ((short) (mt->mt_op)) { 1467 case MTWEOF: /* write an end-of-file record */ 1468 error = st_write_filemarks(st, number, flags); 1469 break; 1470 case MTBSF: /* backward space file */ 1471 number = -number; 1472 case MTFSF: /* forward space file */ 1473 error = st_check_eod(st, FALSE, &nmarks, flags); 1474 if (!error) 1475 error = st_space(st, number - nmarks, 1476 SP_FILEMARKS, flags); 1477 break; 1478 case MTBSR: /* backward space record */ 1479 number = -number; 1480 case MTFSR: /* forward space record */ 1481 error = st_check_eod(st, true, &nmarks, flags); 1482 if (!error) 1483 error = st_space(st, number, SP_BLKS, flags); 1484 break; 1485 case MTREW: /* rewind */ 1486 error = st_rewind(st, 0, flags); 1487 break; 1488 case MTOFFL: /* rewind and put the drive offline */ 1489 st_unmount(st, EJECT); 1490 break; 1491 case MTNOP: /* no operation, sets status only */ 1492 break; 1493 case MTRETEN: /* retension the tape */ 1494 error = st_load(st, LD_RETENSION, flags); 1495 if (!error) 1496 error = st_load(st, LD_LOAD, flags); 1497 break; 1498 case MTEOM: /* forward space to end of media */ 1499 error = st_check_eod(st, FALSE, &nmarks, flags); 1500 if (!error) 1501 error = st_space(st, 1, SP_EOM, flags); 1502 break; 1503 case MTCACHE: /* enable controller cache */ 1504 st->flags &= ~ST_DONTBUFFER; 1505 goto try_new_value; 1506 case MTNOCACHE: /* disable controller cache */ 1507 st->flags |= ST_DONTBUFFER; 1508 goto try_new_value; 1509 case MTERASE: /* erase volume */ 1510 error = st_erase(st, number, flags); 1511 break; 1512 case MTSETBSIZ: /* Set block size for device */ 1513 #ifdef NOTYET 1514 if (!(st->flags & ST_NEW_MOUNT)) { 1515 uprintf("re-mount tape before changing blocksize"); 1516 error = EINVAL; 1517 break; 1518 } 1519 #endif 1520 if (number == 0) 1521 st->flags &= ~ST_FIXEDBLOCKS; 1522 else { 1523 if ((st->blkmin || st->blkmax) && 1524 (number < st->blkmin || 1525 number > st->blkmax)) { 1526 error = EINVAL; 1527 break; 1528 } 1529 st->flags |= ST_FIXEDBLOCKS; 1530 } 1531 st->blksize = number; 1532 st->flags |= ST_BLOCK_SET; /*XXX */ 1533 goto try_new_value; 1534 1535 case MTSETDNSTY: /* Set density for device and mode */ 1536 /* 1537 * Any number >= 0 and <= 0xff is legal. Numbers 1538 * above 0x80 are 'vendor unique'. 1539 */ 1540 if (number < 0 || number > 255) { 1541 error = EINVAL; 1542 break; 1543 } else 1544 st->density = number; 1545 goto try_new_value; 1546 1547 case MTCMPRESS: 1548 error = st->ops(st, (number == 0) ? 1549 ST_OPS_CMPRSS_OFF : ST_OPS_CMPRSS_ON, 1550 XS_CTL_SILENT); 1551 break; 1552 1553 case MTEWARN: 1554 if (number) 1555 st->flags |= ST_EARLYWARN; 1556 else 1557 st->flags &= ~ST_EARLYWARN; 1558 break; 1559 1560 default: 1561 error = EINVAL; 1562 } 1563 break; 1564 } 1565 case MTIOCIEOT: 1566 case MTIOCEEOT: 1567 break; 1568 1569 case MTIOCRDSPOS: 1570 error = st_rdpos(st, 0, (u_int32_t *) arg); 1571 break; 1572 1573 case MTIOCRDHPOS: 1574 error = st_rdpos(st, 1, (u_int32_t *) arg); 1575 break; 1576 1577 case MTIOCSLOCATE: 1578 error = st_setpos(st, 0, (u_int32_t *) arg); 1579 break; 1580 1581 case MTIOCHLOCATE: 1582 error = st_setpos(st, 1, (u_int32_t *) arg); 1583 break; 1584 1585 1586 default: 1587 error = scsipi_do_ioctl(st->sc_periph, dev, cmd, arg, 1588 flag, l); 1589 break; 1590 } 1591 return (error); 1592 /*-----------------------------*/ 1593 try_new_value: 1594 /* 1595 * Check that the mode being asked for is aggreeable to the 1596 * drive. If not, put it back the way it was. 1597 * 1598 * If in control mode, we can make (persistent) mode changes 1599 * even if no medium is loaded (see st(4)). 1600 */ 1601 if ((STMODE(dev) != CTRL_MODE || (st->flags & ST_MOUNTED) != 0) && 1602 (error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 1603 /* put it back as it was */ 1604 printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); 1605 st->density = hold_density; 1606 st->blksize = hold_blksize; 1607 if (st->blksize) 1608 st->flags |= ST_FIXEDBLOCKS; 1609 else 1610 st->flags &= ~ST_FIXEDBLOCKS; 1611 return (error); 1612 } 1613 /* 1614 * As the drive liked it, if we are setting a new default, 1615 * set it into the structures as such. 1616 * 1617 * The means for deciding this are not finalised yet- but 1618 * if the device was opened in Control Mode, the values 1619 * are persistent now across mounts. 1620 */ 1621 if (STMODE(dev) == CTRL_MODE) { 1622 switch ((short) (mt->mt_op)) { 1623 case MTSETBSIZ: 1624 st->modes[dsty].blksize = st->blksize; 1625 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1626 break; 1627 case MTSETDNSTY: 1628 st->modes[dsty].density = st->density; 1629 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1630 break; 1631 } 1632 } 1633 return (0); 1634 } 1635 1636 /* 1637 * Do a synchronous read. 1638 */ 1639 static int 1640 st_read(struct st_softc *st, char *bf, int size, int flags) 1641 { 1642 struct scsi_rw_tape cmd; 1643 1644 /* 1645 * If it's a null transfer, return immediatly 1646 */ 1647 if (size == 0) 1648 return (0); 1649 memset(&cmd, 0, sizeof(cmd)); 1650 cmd.opcode = READ; 1651 if (st->flags & ST_FIXEDBLOCKS) { 1652 cmd.byte2 |= SRW_FIXED; 1653 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1654 cmd.len); 1655 } else 1656 _lto3b(size, cmd.len); 1657 return (scsipi_command(st->sc_periph, 1658 (void *)&cmd, sizeof(cmd), (void *)bf, size, 0, ST_IO_TIME, NULL, 1659 flags | XS_CTL_DATA_IN)); 1660 } 1661 1662 /* 1663 * issue an erase command 1664 */ 1665 static int 1666 st_erase(struct st_softc *st, int full, int flags) 1667 { 1668 int tmo; 1669 struct scsi_erase cmd; 1670 1671 /* 1672 * Full erase means set LONG bit in erase command, which asks 1673 * the drive to erase the entire unit. Without this bit, we're 1674 * asking the drive to write an erase gap. 1675 */ 1676 memset(&cmd, 0, sizeof(cmd)); 1677 cmd.opcode = ERASE; 1678 if (full) { 1679 cmd.byte2 = SE_LONG; 1680 tmo = ST_SPC_TIME; 1681 } else { 1682 tmo = ST_IO_TIME; 1683 } 1684 1685 /* 1686 * XXX We always do this asynchronously, for now, unless the device 1687 * has the ST_Q_ERASE_NOIMM quirk. How long should we wait if we 1688 * want to (eventually) to it synchronously? 1689 */ 1690 if ((st->quirks & ST_Q_ERASE_NOIMM) == 0) 1691 cmd.byte2 |= SE_IMMED; 1692 1693 return (scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1694 ST_RETRIES, tmo, NULL, flags)); 1695 } 1696 1697 /* 1698 * skip N blocks/filemarks/seq filemarks/eom 1699 */ 1700 static int 1701 st_space(struct st_softc *st, int number, u_int what, int flags) 1702 { 1703 struct scsi_space cmd; 1704 int error; 1705 1706 switch (what) { 1707 case SP_BLKS: 1708 if (st->flags & ST_PER_ACTION) { 1709 if (number > 0) { 1710 st->flags &= ~ST_PER_ACTION; 1711 return (EIO); 1712 } else if (number < 0) { 1713 if (st->flags & ST_AT_FILEMARK) { 1714 /* 1715 * Handling of ST_AT_FILEMARK 1716 * in st_space will fill in the 1717 * right file mark count. 1718 */ 1719 error = st_space(st, 0, SP_FILEMARKS, 1720 flags); 1721 if (error) 1722 return (error); 1723 } 1724 if (st->flags & ST_BLANK_READ) { 1725 st->flags &= ~ST_BLANK_READ; 1726 return (EIO); 1727 } 1728 st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); 1729 } 1730 } 1731 break; 1732 case SP_FILEMARKS: 1733 if (st->flags & ST_EIO_PENDING) { 1734 if (number > 0) { 1735 /* pretend we just discovered the error */ 1736 st->flags &= ~ST_EIO_PENDING; 1737 return (EIO); 1738 } else if (number < 0) { 1739 /* back away from the error */ 1740 st->flags &= ~ST_EIO_PENDING; 1741 } 1742 } 1743 if (st->flags & ST_AT_FILEMARK) { 1744 st->flags &= ~ST_AT_FILEMARK; 1745 number--; 1746 } 1747 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 1748 /* back away from unwritten tape */ 1749 st->flags &= ~ST_BLANK_READ; 1750 number++; /* XXX dubious */ 1751 } 1752 break; 1753 case SP_EOM: 1754 if (st->flags & ST_EOM_PENDING) { 1755 /* we're already there */ 1756 st->flags &= ~ST_EOM_PENDING; 1757 return (0); 1758 } 1759 if (st->flags & ST_EIO_PENDING) { 1760 /* pretend we just discovered the error */ 1761 st->flags &= ~ST_EIO_PENDING; 1762 return (EIO); 1763 } 1764 if (st->flags & ST_AT_FILEMARK) 1765 st->flags &= ~ST_AT_FILEMARK; 1766 break; 1767 } 1768 if (number == 0) 1769 return (0); 1770 1771 memset(&cmd, 0, sizeof(cmd)); 1772 cmd.opcode = SPACE; 1773 cmd.byte2 = what; 1774 _lto3b(number, cmd.number); 1775 1776 st->flags &= ~ST_POSUPDATED; 1777 st->last_ctl_resid = 0; 1778 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1779 0, ST_SPC_TIME, NULL, flags); 1780 1781 if (error == 0 && (st->flags & ST_POSUPDATED) == 0) { 1782 number = number - st->last_ctl_resid; 1783 if (what == SP_BLKS) { 1784 if (st->blkno != -1) { 1785 st->blkno += number; 1786 } 1787 } else if (what == SP_FILEMARKS) { 1788 if (st->fileno != -1) { 1789 st->fileno += number; 1790 if (number > 0) { 1791 st->blkno = 0; 1792 } else if (number < 0) { 1793 st->blkno = -1; 1794 } 1795 } 1796 } else if (what == SP_EOM) { 1797 /* 1798 * This loses us relative position. 1799 */ 1800 st->fileno = st->blkno = -1; 1801 } 1802 } 1803 return (error); 1804 } 1805 1806 /* 1807 * write N filemarks 1808 */ 1809 static int 1810 st_write_filemarks(struct st_softc *st, int number, int flags) 1811 { 1812 int error; 1813 struct scsi_write_filemarks cmd; 1814 1815 /* 1816 * It's hard to write a negative number of file marks. 1817 * Don't try. 1818 */ 1819 if (number < 0) 1820 return (EINVAL); 1821 switch (number) { 1822 case 0: /* really a command to sync the drive's buffers */ 1823 break; 1824 case 1: 1825 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 1826 st->flags &= ~ST_WRITTEN; 1827 else 1828 st->flags |= ST_FM_WRITTEN; 1829 st->flags &= ~ST_PER_ACTION; 1830 break; 1831 default: 1832 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 1833 } 1834 1835 memset(&cmd, 0, sizeof(cmd)); 1836 cmd.opcode = WRITE_FILEMARKS; 1837 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1838 cmd.byte2 = SR_IMMED; 1839 /* 1840 * The ATAPI Onstream DI-30 doesn't support writing filemarks, but 1841 * WRITE_FILEMARKS is still used to flush the buffer 1842 */ 1843 if ((st->quirks & ST_Q_NOFILEMARKS) == 0) 1844 _lto3b(number, cmd.number); 1845 1846 /* XXX WE NEED TO BE ABLE TO GET A RESIDIUAL XXX */ 1847 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1848 0, ST_IO_TIME * 4, NULL, flags); 1849 if (error == 0 && st->fileno != -1) { 1850 st->fileno += number; 1851 } 1852 return (error); 1853 } 1854 1855 /* 1856 * Make sure the right number of file marks is on tape if the 1857 * tape has been written. If the position argument is true, 1858 * leave the tape positioned where it was originally. 1859 * 1860 * nmarks returns the number of marks to skip (or, if position 1861 * true, which were skipped) to get back original position. 1862 */ 1863 static int 1864 st_check_eod(struct st_softc *st, boolean position, int *nmarks, int flags) 1865 { 1866 int error; 1867 1868 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 1869 default: 1870 *nmarks = 0; 1871 return (0); 1872 case ST_WRITTEN: 1873 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 1874 *nmarks = 1; 1875 break; 1876 case ST_WRITTEN | ST_2FM_AT_EOD: 1877 *nmarks = 2; 1878 } 1879 error = st_write_filemarks(st, *nmarks, flags); 1880 if (position && !error) 1881 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 1882 return (error); 1883 } 1884 1885 /* 1886 * load/unload/retension 1887 */ 1888 static int 1889 st_load(struct st_softc *st, u_int type, int flags) 1890 { 1891 int error; 1892 struct scsi_load cmd; 1893 1894 if (type != LD_LOAD) { 1895 int nmarks; 1896 1897 error = st_check_eod(st, FALSE, &nmarks, flags); 1898 if (error) { 1899 printf("%s: failed to write closing filemarks at " 1900 "unload, errno=%d\n", st->sc_dev.dv_xname, error); 1901 return (error); 1902 } 1903 } 1904 if (st->quirks & ST_Q_IGNORE_LOADS) { 1905 if (type == LD_LOAD) { 1906 /* 1907 * If we ignore loads, at least we should try a rewind. 1908 */ 1909 return st_rewind(st, 0, flags); 1910 } 1911 /* otherwise, we should do what's asked of us */ 1912 } 1913 1914 memset(&cmd, 0, sizeof(cmd)); 1915 cmd.opcode = LOAD; 1916 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1917 cmd.byte2 = SR_IMMED; 1918 cmd.how = type; 1919 1920 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1921 ST_RETRIES, ST_SPC_TIME, NULL, flags); 1922 if (error) { 1923 printf("%s: error %d in st_load (op %d)\n", 1924 st->sc_dev.dv_xname, error, type); 1925 } 1926 return (error); 1927 } 1928 1929 /* 1930 * Rewind the device 1931 */ 1932 static int 1933 st_rewind(struct st_softc *st, u_int immediate, int flags) 1934 { 1935 struct scsi_rewind cmd; 1936 int error; 1937 int nmarks; 1938 1939 error = st_check_eod(st, FALSE, &nmarks, flags); 1940 if (error) { 1941 printf("%s: failed to write closing filemarks at " 1942 "rewind, errno=%d\n", st->sc_dev.dv_xname, error); 1943 return (error); 1944 } 1945 st->flags &= ~ST_PER_ACTION; 1946 1947 /* 1948 * ATAPI tapes always need immediate to be set 1949 */ 1950 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1951 immediate = SR_IMMED; 1952 1953 memset(&cmd, 0, sizeof(cmd)); 1954 cmd.opcode = REWIND; 1955 cmd.byte2 = immediate; 1956 1957 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1958 ST_RETRIES, immediate ? ST_CTL_TIME: ST_SPC_TIME, NULL, flags); 1959 if (error) { 1960 printf("%s: error %d trying to rewind\n", 1961 st->sc_dev.dv_xname, error); 1962 /* lost position */ 1963 st->fileno = st->blkno = -1; 1964 } else { 1965 st->fileno = st->blkno = 0; 1966 } 1967 return (error); 1968 } 1969 1970 static int 1971 st_rdpos(struct st_softc *st, int hard, u_int32_t *blkptr) 1972 { 1973 int error; 1974 u_int8_t posdata[20]; 1975 struct scsi_tape_read_position cmd; 1976 1977 /* 1978 * We try and flush any buffered writes here if we were writing 1979 * and we're trying to get hardware block position. It eats 1980 * up performance substantially, but I'm wary of drive firmware. 1981 * 1982 * I think that *logical* block position is probably okay- 1983 * but hardware block position might have to wait for data 1984 * to hit media to be valid. Caveat Emptor. 1985 */ 1986 1987 if (hard && (st->flags & ST_WRITTEN)) { 1988 /* 1989 * First flush any pending writes... 1990 */ 1991 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 1992 /* 1993 * The latter case is for 'write protected' tapes 1994 * which are too stupid to recognize a zero count 1995 * for writing filemarks as a no-op. 1996 */ 1997 if (error != 0 && error != EACCES && error != EROFS) 1998 return (error); 1999 } 2000 2001 memset(&cmd, 0, sizeof(cmd)); 2002 memset(&posdata, 0, sizeof(posdata)); 2003 cmd.opcode = READ_POSITION; 2004 if (hard) 2005 cmd.byte1 = 1; 2006 2007 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 2008 (void *)&posdata, sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, 2009 XS_CTL_SILENT | XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); 2010 2011 if (error == 0) { 2012 #if 0 2013 printf("posdata:"); 2014 for (hard = 0; hard < sizeof(posdata); hard++) 2015 printf("%02x ", posdata[hard] & 0xff); 2016 printf("\n"); 2017 #endif 2018 if (posdata[0] & 0x4) /* Block Position Unknown */ 2019 error = EINVAL; 2020 else 2021 *blkptr = _4btol(&posdata[4]); 2022 } 2023 return (error); 2024 } 2025 2026 static int 2027 st_setpos(struct st_softc *st, int hard, u_int32_t *blkptr) 2028 { 2029 int error; 2030 struct scsi_tape_locate cmd; 2031 2032 /* 2033 * We used to try and flush any buffered writes here. 2034 * Now we push this onto user applications to either 2035 * flush the pending writes themselves (via a zero count 2036 * WRITE FILEMARKS command) or they can trust their tape 2037 * drive to do this correctly for them. 2038 * 2039 * There are very ugly performance limitations otherwise. 2040 */ 2041 2042 memset(&cmd, 0, sizeof(cmd)); 2043 cmd.opcode = LOCATE; 2044 if (hard) 2045 cmd.byte2 = 1 << 2; 2046 _lto4b(*blkptr, cmd.blkaddr); 2047 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 2048 ST_RETRIES, ST_SPC_TIME, NULL, 0); 2049 /* 2050 * Note file && block number position now unknown (if 2051 * these things ever start being maintained in this driver) 2052 */ 2053 st->fileno = st->blkno = -1; 2054 return (error); 2055 } 2056 2057 2058 /* 2059 * Look at the returned sense and act on the error and determine 2060 * the unix error number to pass back..., 0 (== report no error), 2061 * -1 = retry the operation, -2 continue error processing. 2062 */ 2063 static int 2064 st_interpret_sense(struct scsipi_xfer *xs) 2065 { 2066 struct scsipi_periph *periph = xs->xs_periph; 2067 struct scsi_sense_data *sense = &xs->sense.scsi_sense; 2068 struct buf *bp = xs->bp; 2069 struct st_softc *st = (void *)periph->periph_dev; 2070 int retval = EJUSTRETURN; 2071 int doprint = ((xs->xs_control & XS_CTL_SILENT) == 0); 2072 u_int8_t key; 2073 int32_t info; 2074 2075 /* 2076 * If it isn't a extended or extended/deferred error, let 2077 * the generic code handle it. 2078 */ 2079 if (SSD_RCODE(sense->response_code) != SSD_RCODE_CURRENT && 2080 SSD_RCODE(sense->response_code) != SSD_RCODE_DEFERRED) 2081 return (retval); 2082 2083 if (sense->response_code & SSD_RCODE_VALID) 2084 info = _4btol(sense->info); 2085 else 2086 info = (st->flags & ST_FIXEDBLOCKS) ? 2087 xs->datalen / st->blksize : xs->datalen; 2088 key = SSD_SENSE_KEY(sense->flags); 2089 st->mt_erreg = key; 2090 st->asc = sense->asc; 2091 st->ascq = sense->ascq; 2092 st->mt_resid = (short) info; 2093 2094 if (key == SKEY_NOT_READY && st->asc == 0x4 && st->ascq == 0x1) { 2095 /* Not Ready, Logical Unit Is in Process Of Becoming Ready */ 2096 if (!callout_pending(&periph->periph_callout)) 2097 scsipi_periph_freeze(periph, 1); 2098 callout_reset(&periph->periph_callout, 2099 hz, scsipi_periph_timed_thaw, periph); 2100 return (ERESTART); 2101 } 2102 2103 /* 2104 * If the device is not open yet, let generic handle 2105 */ 2106 if ((periph->periph_flags & PERIPH_OPEN) == 0) { 2107 return (retval); 2108 } 2109 2110 xs->resid = info; 2111 if (st->flags & ST_FIXEDBLOCKS) { 2112 if (bp) { 2113 xs->resid *= st->blksize; 2114 st->last_io_resid = xs->resid; 2115 } else { 2116 st->last_ctl_resid = xs->resid; 2117 } 2118 if (key == SKEY_VOLUME_OVERFLOW) { 2119 st->flags |= ST_EIO_PENDING; 2120 if (bp) 2121 bp->b_resid = xs->resid; 2122 } else if (sense->flags & SSD_EOM) { 2123 if ((st->flags & ST_EARLYWARN) == 0) 2124 st->flags |= ST_EIO_PENDING; 2125 st->flags |= ST_EOM_PENDING; 2126 if (bp) { 2127 #if 0 2128 bp->b_resid = xs->resid; 2129 #else 2130 /* 2131 * Grotesque as it seems, the few times 2132 * I've actually seen a non-zero resid, 2133 * the tape drive actually lied and had 2134 * written all the data! 2135 */ 2136 bp->b_resid = 0; 2137 #endif 2138 } 2139 } 2140 if (sense->flags & SSD_FILEMARK) { 2141 st->flags |= ST_AT_FILEMARK; 2142 if (bp) 2143 bp->b_resid = xs->resid; 2144 if (st->fileno != (daddr_t) -1) { 2145 st->fileno++; 2146 st->blkno = 0; 2147 st->flags |= ST_POSUPDATED; 2148 } 2149 } 2150 if (sense->flags & SSD_ILI) { 2151 st->flags |= ST_EIO_PENDING; 2152 if (bp) 2153 bp->b_resid = xs->resid; 2154 if (sense->response_code & SSD_RCODE_VALID && 2155 (xs->xs_control & XS_CTL_SILENT) == 0) 2156 printf("%s: block wrong size, %d blocks " 2157 "residual\n", st->sc_dev.dv_xname, info); 2158 2159 /* 2160 * This quirk code helps the drive read 2161 * the first tape block, regardless of 2162 * format. That is required for these 2163 * drives to return proper MODE SENSE 2164 * information. 2165 */ 2166 if ((st->quirks & ST_Q_SENSE_HELP) && 2167 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 2168 st->blksize -= 512; 2169 else if ((st->flags & ST_POSUPDATED) == 0) { 2170 if (st->blkno != (daddr_t) -1) { 2171 st->blkno += 2172 (xs->datalen / st->blksize); 2173 st->flags |= ST_POSUPDATED; 2174 } 2175 } 2176 } 2177 /* 2178 * If data wanted and no data was transferred, do it immediately 2179 */ 2180 if (xs->datalen && xs->resid >= xs->datalen) { 2181 if (st->flags & ST_EIO_PENDING) 2182 return (EIO); 2183 if (st->flags & ST_AT_FILEMARK) { 2184 if (bp) 2185 bp->b_resid = xs->resid; 2186 return (0); 2187 } 2188 } 2189 } else { /* must be variable mode */ 2190 if (bp) { 2191 st->last_io_resid = xs->resid; 2192 } else { 2193 st->last_ctl_resid = xs->resid; 2194 } 2195 if (sense->flags & SSD_EOM) { 2196 /* 2197 * The current semantics of this 2198 * driver requires EOM detection 2199 * to return EIO unless early 2200 * warning detection is enabled 2201 * for variable mode (this is always 2202 * on for fixed block mode). 2203 */ 2204 if (st->flags & ST_EARLYWARN) { 2205 st->flags |= ST_EOM_PENDING; 2206 retval = 0; 2207 } else { 2208 retval = EIO; 2209 } 2210 2211 /* 2212 * If it's an unadorned EOM detection, 2213 * suppress printing an error. 2214 */ 2215 if (key == SKEY_NO_SENSE) { 2216 doprint = 0; 2217 } 2218 } else if (sense->flags & SSD_FILEMARK) { 2219 retval = 0; 2220 if (st->fileno != (daddr_t) -1) { 2221 st->fileno++; 2222 st->blkno = 0; 2223 st->flags |= ST_POSUPDATED; 2224 } 2225 } else if (sense->flags & SSD_ILI) { 2226 if (info < 0) { 2227 /* 2228 * The tape record was bigger than the read 2229 * we issued. 2230 */ 2231 if ((xs->xs_control & XS_CTL_SILENT) == 0) { 2232 printf("%s: %d-byte tape record too big" 2233 " for %d-byte user buffer\n", 2234 st->sc_dev.dv_xname, 2235 xs->datalen - info, xs->datalen); 2236 } 2237 retval = EIO; 2238 } else { 2239 retval = 0; 2240 if (st->blkno != (daddr_t) -1) { 2241 st->blkno++; 2242 st->flags |= ST_POSUPDATED; 2243 } 2244 } 2245 } 2246 if (bp) 2247 bp->b_resid = info; 2248 } 2249 2250 #ifndef SCSIPI_DEBUG 2251 if (retval == 0 && key == SKEY_NO_SENSE) 2252 doprint = 0; 2253 #endif 2254 if (key == SKEY_BLANK_CHECK) { 2255 /* 2256 * This quirk code helps the drive read the 2257 * first tape block, regardless of format. That 2258 * is required for these drives to return proper 2259 * MODE SENSE information. 2260 */ 2261 if ((st->quirks & ST_Q_SENSE_HELP) && 2262 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 2263 /* still starting */ 2264 st->blksize -= 512; 2265 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 2266 st->flags |= ST_BLANK_READ; 2267 xs->resid = xs->datalen; 2268 if (bp) { 2269 bp->b_resid = xs->resid; 2270 /* return an EOF */ 2271 } 2272 retval = 0; 2273 /* lost position */ 2274 st->fileno = st->blkno = -1; 2275 } 2276 } 2277 2278 /* 2279 * If generic sense processing will continue, we should not 2280 * print sense info here. 2281 */ 2282 if (retval == EJUSTRETURN) 2283 doprint = 0; 2284 2285 if (doprint) { 2286 #ifdef SCSIVERBOSE 2287 scsipi_print_sense(xs, 0); 2288 #else 2289 scsipi_printaddr(periph); 2290 printf("Sense Key 0x%02x", key); 2291 if ((sense->response_code & SSD_RCODE_VALID) != 0) { 2292 switch (key) { 2293 case SKEY_NOT_READY: 2294 case SKEY_ILLEGAL_REQUEST: 2295 case SKEY_UNIT_ATTENTION: 2296 case SKEY_DATA_PROTECT: 2297 break; 2298 case SKEY_VOLUME_OVERFLOW: 2299 case SKEY_BLANK_CHECK: 2300 printf(", requested size: %d (decimal)", info); 2301 break; 2302 case SKEY_ABORTED_COMMAND: 2303 if (xs->xs_retries) 2304 printf(", retrying"); 2305 printf(", cmd 0x%x, info 0x%x", 2306 xs->cmd->opcode, info); 2307 break; 2308 default: 2309 printf(", info = %d (decimal)", info); 2310 } 2311 } 2312 if (sense->extra_len != 0) { 2313 int n; 2314 printf(", data ="); 2315 for (n = 0; n < sense->extra_len; n++) 2316 printf(" %02x", sense->csi[n]); 2317 } 2318 printf("\n"); 2319 #endif 2320 } 2321 return (retval); 2322 } 2323 2324 /* 2325 * The quirk here is that the drive returns some value to st_mode_sense 2326 * incorrectly until the tape has actually passed by the head. 2327 * 2328 * The method is to set the drive to large fixed-block state (user-specified 2329 * density and 1024-byte blocks), then read and rewind to get it to sense the 2330 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 2331 * work, as a last resort, try variable- length blocks. The result will be 2332 * the ability to do an accurate st_mode_sense. 2333 * 2334 * We know we can do a rewind because we just did a load, which implies rewind. 2335 * Rewind seems preferable to space backward if we have a virgin tape. 2336 * 2337 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 2338 * error processing, both part of st_interpret_sense. 2339 */ 2340 static int 2341 st_touch_tape(struct st_softc *st) 2342 { 2343 char *bf; 2344 int readsize; 2345 int error; 2346 2347 bf = malloc(1024, M_TEMP, M_NOWAIT); 2348 if (bf == NULL) 2349 return (ENOMEM); 2350 2351 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 2352 goto bad; 2353 2354 /* 2355 * If the block size is already known from the 2356 * sense data, use it. Else start probing at 1024. 2357 */ 2358 if (st->media_blksize > 0) 2359 st->blksize = st->media_blksize; 2360 else 2361 st->blksize = 1024; 2362 2363 do { 2364 switch (st->blksize) { 2365 case 512: 2366 case 1024: 2367 readsize = st->blksize; 2368 st->flags |= ST_FIXEDBLOCKS; 2369 break; 2370 default: 2371 readsize = 1; 2372 st->flags &= ~ST_FIXEDBLOCKS; 2373 } 2374 if ((error = st->ops(st, ST_OPS_MODESELECT, XS_CTL_SILENT)) 2375 != 0) { 2376 /* 2377 * The device did not agree with the proposed 2378 * block size. If we exhausted our options, 2379 * return failure, else try another. 2380 */ 2381 if (readsize == 1) 2382 goto bad; 2383 st->blksize -= 512; 2384 continue; 2385 } 2386 st_read(st, bf, readsize, XS_CTL_SILENT); /* XXX */ 2387 if ((error = st_rewind(st, 0, 0)) != 0) { 2388 bad: free(bf, M_TEMP); 2389 return (error); 2390 } 2391 } while (readsize != 1 && readsize > st->blksize); 2392 2393 free(bf, M_TEMP); 2394 return (0); 2395 } 2396 2397 static int 2398 stdump(dev_t dev, daddr_t blkno, caddr_t va, 2399 size_t size) 2400 { 2401 2402 /* Not implemented. */ 2403 return (ENXIO); 2404 } 2405
Indexes created Tue Sep 23 14:10:03 GMT 2025