1 /* $NetBSD: st.c,v 1.192 2006/08/23 17:19:32 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 2004 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Charles M. Hannum. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Originally written by Julian Elischer (julian@tfs.com) 41 * for TRW Financial Systems for use under the MACH(2.5) operating system. 42 * 43 * TRW Financial Systems, in accordance with their agreement with Carnegie 44 * Mellon University, makes this software available to CMU to distribute 45 * or use in any manner that they see fit as long as this message is kept with 46 * the software. For this reason TFS also grants any other persons or 47 * organisations permission to use or modify this software. 48 * 49 * TFS supplies this software to be publicly redistributed 50 * on the understanding that TFS is not responsible for the correct 51 * functioning of this software in any circumstances. 52 * 53 * Ported to run under 386BSD by Julian Elischer (julian@tfs.com) Sept 1992 54 * major changes by Julian Elischer (julian@jules.dialix.oz.au) May 1993 55 * 56 * A lot of rewhacking done by mjacob (mjacob@nas.nasa.gov). 57 */ 58 59 #include <sys/cdefs.h> 60 __KERNEL_RCSID(0, "$NetBSD: st.c,v 1.192 2006/08/23 17:19:32 christos Exp $"); 61 62 #include "opt_scsi.h" 63 64 #include <sys/param.h> 65 #include <sys/systm.h> 66 #include <sys/fcntl.h> 67 #include <sys/errno.h> 68 #include <sys/ioctl.h> 69 #include <sys/malloc.h> 70 #include <sys/buf.h> 71 #include <sys/bufq.h> 72 #include <sys/proc.h> 73 #include <sys/user.h> 74 #include <sys/mtio.h> 75 #include <sys/device.h> 76 #include <sys/conf.h> 77 #include <sys/kernel.h> 78 #include <sys/vnode.h> 79 #include <sys/iostat.h> 80 #include <sys/sysctl.h> 81 82 #include <dev/scsipi/scsi_spc.h> 83 #include <dev/scsipi/scsipi_all.h> 84 #include <dev/scsipi/scsi_all.h> 85 #include <dev/scsipi/scsi_tape.h> 86 #include <dev/scsipi/scsipiconf.h> 87 #include <dev/scsipi/scsipi_base.h> 88 #include <dev/scsipi/stvar.h> 89 90 /* Defines for device specific stuff */ 91 #define DEF_FIXED_BSIZE 512 92 93 #define STMODE(z) ( minor(z) & 0x03) 94 #define STDSTY(z) ((minor(z) >> 2) & 0x03) 95 #define STUNIT(z) ((minor(z) >> 4) ) 96 #define STNMINOR 16 97 98 #define NORMAL_MODE 0 99 #define NOREW_MODE 1 100 #define EJECT_MODE 2 101 #define CTRL_MODE 3 102 103 #define FALSE 0 104 #define TRUE 1 105 106 #ifndef ST_MOUNT_DELAY 107 #define ST_MOUNT_DELAY 0 108 #endif 109 110 static dev_type_open(stopen); 111 static dev_type_close(stclose); 112 static dev_type_read(stread); 113 static dev_type_write(stwrite); 114 static dev_type_ioctl(stioctl); 115 static dev_type_strategy(ststrategy); 116 static dev_type_dump(stdump); 117 118 const struct bdevsw st_bdevsw = { 119 stopen, stclose, ststrategy, stioctl, stdump, nosize, D_TAPE 120 }; 121 122 const struct cdevsw st_cdevsw = { 123 stopen, stclose, stread, stwrite, stioctl, 124 nostop, notty, nopoll, nommap, nokqfilter, D_TAPE 125 }; 126 127 /* 128 * Define various devices that we know mis-behave in some way, 129 * and note how they are bad, so we can correct for them 130 */ 131 132 static const struct st_quirk_inquiry_pattern st_quirk_patterns[] = { 133 {{T_SEQUENTIAL, T_REMOV, 134 " ", " ", " "}, {0, 0, { 135 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 136 {ST_Q_FORCE_BLKSIZE, 512, QIC_24}, /* minor 4-7 */ 137 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_1600}, /* minor 8-11 */ 138 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_6250} /* minor 12-15 */ 139 }}}, 140 {{T_SEQUENTIAL, T_REMOV, 141 "TANDBERG", " TDC 3600 ", ""}, {0, 12, { 142 {0, 0, 0}, /* minor 0-3 */ 143 {ST_Q_FORCE_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 144 {0, 0, QIC_150}, /* minor 8-11 */ 145 {0, 0, QIC_120} /* minor 12-15 */ 146 }}}, 147 {{T_SEQUENTIAL, T_REMOV, 148 "TANDBERG", " TDC 3800 ", ""}, {0, 0, { 149 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 150 {0, 0, QIC_525}, /* minor 4-7 */ 151 {0, 0, QIC_150}, /* minor 8-11 */ 152 {0, 0, QIC_120} /* minor 12-15 */ 153 }}}, 154 {{T_SEQUENTIAL, T_REMOV, 155 "TANDBERG", " SLR5 4/8GB ", ""}, {0, 0, { 156 {ST_Q_FORCE_BLKSIZE, 1024, 0}, /* minor 0-3 */ 157 {0, 0, 0}, /* minor 4-7 */ 158 {0, 0, 0}, /* minor 8-11 */ 159 {0, 0, 0} /* minor 12-15 */ 160 }}}, 161 /* 162 * lacking a manual for the 4200, it's not clear what the 163 * specific density codes should be- the device is a 2.5GB 164 * capable QIC drive, those density codes aren't readily 165 * availabel. The 'default' will just have to do. 166 */ 167 {{T_SEQUENTIAL, T_REMOV, 168 "TANDBERG", " TDC 4200 ", ""}, {0, 0, { 169 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 170 {0, 0, QIC_525}, /* minor 4-7 */ 171 {0, 0, QIC_150}, /* minor 8-11 */ 172 {0, 0, QIC_120} /* minor 12-15 */ 173 }}}, 174 /* 175 * At least -005 and -007 need this. I'll assume they all do unless I 176 * hear otherwise. - mycroft, 31MAR1994 177 */ 178 {{T_SEQUENTIAL, T_REMOV, 179 "ARCHIVE ", "VIPER 2525 25462", ""}, {0, 0, { 180 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 181 {ST_Q_SENSE_HELP, 0, QIC_525}, /* minor 4-7 */ 182 {0, 0, QIC_150}, /* minor 8-11 */ 183 {0, 0, QIC_120} /* minor 12-15 */ 184 }}}, 185 /* 186 * One user reports that this works for his tape drive. It probably 187 * needs more work. - mycroft, 09APR1994 188 */ 189 {{T_SEQUENTIAL, T_REMOV, 190 "SANKYO ", "CP525 ", ""}, {0, 0, { 191 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 192 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 193 {0, 0, QIC_150}, /* minor 8-11 */ 194 {0, 0, QIC_120} /* minor 12-15 */ 195 }}}, 196 {{T_SEQUENTIAL, T_REMOV, 197 "ANRITSU ", "DMT780 ", ""}, {0, 0, { 198 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 199 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 200 {0, 0, QIC_150}, /* minor 8-11 */ 201 {0, 0, QIC_120} /* minor 12-15 */ 202 }}}, 203 {{T_SEQUENTIAL, T_REMOV, 204 "ARCHIVE ", "VIPER 150 21247", ""}, {ST_Q_ERASE_NOIMM, 12, { 205 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 206 {0, 0, QIC_150}, /* minor 4-7 */ 207 {0, 0, QIC_120}, /* minor 8-11 */ 208 {0, 0, QIC_24} /* minor 12-15 */ 209 }}}, 210 {{T_SEQUENTIAL, T_REMOV, 211 "ARCHIVE ", "VIPER 150 21531", ""}, {ST_Q_ERASE_NOIMM, 12, { 212 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 213 {0, 0, QIC_150}, /* minor 4-7 */ 214 {0, 0, QIC_120}, /* minor 8-11 */ 215 {0, 0, QIC_24} /* minor 12-15 */ 216 }}}, 217 {{T_SEQUENTIAL, T_REMOV, 218 "WANGTEK ", "5099ES SCSI", ""}, {0, 0, { 219 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 220 {0, 0, QIC_11}, /* minor 4-7 */ 221 {0, 0, QIC_24}, /* minor 8-11 */ 222 {0, 0, QIC_24} /* minor 12-15 */ 223 }}}, 224 {{T_SEQUENTIAL, T_REMOV, 225 "WANGTEK ", "5150ES SCSI", ""}, {0, 0, { 226 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 227 {0, 0, QIC_24}, /* minor 4-7 */ 228 {0, 0, QIC_120}, /* minor 8-11 */ 229 {0, 0, QIC_150} /* minor 12-15 */ 230 }}}, 231 {{T_SEQUENTIAL, T_REMOV, 232 "WANGTEK ", "5525ES SCSI REV7", ""}, {0, 0, { 233 {0, 0, 0}, /* minor 0-3 */ 234 {ST_Q_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 235 {0, 0, QIC_150}, /* minor 8-11 */ 236 {0, 0, QIC_120} /* minor 12-15 */ 237 }}}, 238 {{T_SEQUENTIAL, T_REMOV, 239 "WangDAT ", "Model 1300 ", ""}, {0, 0, { 240 {0, 0, 0}, /* minor 0-3 */ 241 {ST_Q_FORCE_BLKSIZE, 512, DDS}, /* minor 4-7 */ 242 {ST_Q_FORCE_BLKSIZE, 1024, DDS}, /* minor 8-11 */ 243 {ST_Q_FORCE_BLKSIZE, 0, DDS} /* minor 12-15 */ 244 }}}, 245 {{T_SEQUENTIAL, T_REMOV, 246 "EXABYTE ", "EXB-8200 ", "263H"}, {0, 5, { 247 {0, 0, 0}, /* minor 0-3 */ 248 {0, 0, 0}, /* minor 4-7 */ 249 {0, 0, 0}, /* minor 8-11 */ 250 {0, 0, 0} /* minor 12-15 */ 251 }}}, 252 {{T_SEQUENTIAL, T_REMOV, 253 "STK", "9490", ""}, 254 {ST_Q_FORCE_BLKSIZE, 0, { 255 {0, 0, 0}, /* minor 0-3 */ 256 {0, 0, 0}, /* minor 4-7 */ 257 {0, 0, 0}, /* minor 8-11 */ 258 {0, 0, 0} /* minor 12-15 */ 259 }}}, 260 {{T_SEQUENTIAL, T_REMOV, 261 "STK", "SD-3", ""}, 262 {ST_Q_FORCE_BLKSIZE, 0, { 263 {0, 0, 0}, /* minor 0-3 */ 264 {0, 0, 0}, /* minor 4-7 */ 265 {0, 0, 0}, /* minor 8-11 */ 266 {0, 0, 0} /* minor 12-15 */ 267 }}}, 268 {{T_SEQUENTIAL, T_REMOV, 269 "IBM", "03590", ""}, {ST_Q_IGNORE_LOADS, 0, { 270 {0, 0, 0}, /* minor 0-3 */ 271 {0, 0, 0}, /* minor 4-7 */ 272 {0, 0, 0}, /* minor 8-11 */ 273 {0, 0, 0} /* minor 12-15 */ 274 }}}, 275 {{T_SEQUENTIAL, T_REMOV, 276 "HP ", "T4000s ", ""}, {ST_Q_UNIMODAL, 0, { 277 {0, 0, QIC_3095}, /* minor 0-3 */ 278 {0, 0, QIC_3095}, /* minor 4-7 */ 279 {0, 0, QIC_3095}, /* minor 8-11 */ 280 {0, 0, QIC_3095}, /* minor 12-15 */ 281 }}}, 282 #if 0 283 {{T_SEQUENTIAL, T_REMOV, 284 "EXABYTE ", "EXB-8200 ", ""}, {0, 12, { 285 {0, 0, 0}, /* minor 0-3 */ 286 {0, 0, 0}, /* minor 4-7 */ 287 {0, 0, 0}, /* minor 8-11 */ 288 {0, 0, 0} /* minor 12-15 */ 289 }}}, 290 #endif 291 {{T_SEQUENTIAL, T_REMOV, 292 "TEAC ", "MT-2ST/N50 ", ""}, {ST_Q_IGNORE_LOADS, 0, { 293 {0, 0, 0}, /* minor 0-3 */ 294 {0, 0, 0}, /* minor 4-7 */ 295 {0, 0, 0}, /* minor 8-11 */ 296 {0, 0, 0} /* minor 12-15 */ 297 }}}, 298 {{T_SEQUENTIAL, T_REMOV, 299 "OnStream", "ADR50 Drive", ""}, {ST_Q_UNIMODAL, 0, { 300 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 301 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 4-7 */ 302 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 8-11 */ 303 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 12-15 */ 304 }}}, 305 {{T_SEQUENTIAL, T_REMOV, 306 "OnStream DI-30", "", "1.0"}, {ST_Q_NOFILEMARKS, 0, { 307 {0, 0, 0}, /* minor 0-3 */ 308 {0, 0, 0}, /* minor 4-7 */ 309 {0, 0, 0}, /* minor 8-11 */ 310 {0, 0, 0} /* minor 12-15 */ 311 }}}, 312 {{T_SEQUENTIAL, T_REMOV, 313 "NCR H621", "0-STD-03-46F880 ", ""}, {ST_Q_NOPREVENT, 0, { 314 {0, 0, 0}, /* minor 0-3 */ 315 {0, 0, 0}, /* minor 4-7 */ 316 {0, 0, 0}, /* minor 8-11 */ 317 {0, 0, 0} /* minor 12-15 */ 318 }}}, 319 }; 320 321 #define NOEJECT 0 322 #define EJECT 1 323 324 static void st_identify_drive(struct st_softc *, 325 struct scsipi_inquiry_pattern *); 326 static void st_loadquirks(struct st_softc *); 327 static int st_mount_tape(dev_t, int); 328 static void st_unmount(struct st_softc *, boolean); 329 static int st_decide_mode(struct st_softc *, boolean); 330 static void ststart(struct scsipi_periph *); 331 static void strestart(void *); 332 static void stdone(struct scsipi_xfer *, int); 333 static int st_read(struct st_softc *, char *, int, int); 334 static int st_space(struct st_softc *, int, u_int, int); 335 static int st_write_filemarks(struct st_softc *, int, int); 336 static int st_check_eod(struct st_softc *, boolean, int *, int); 337 static int st_load(struct st_softc *, u_int, int); 338 static int st_rewind(struct st_softc *, u_int, int); 339 static int st_interpret_sense(struct scsipi_xfer *); 340 static int st_touch_tape(struct st_softc *); 341 static int st_erase(struct st_softc *, int full, int flags); 342 static int st_rdpos(struct st_softc *, int, u_int32_t *); 343 static int st_setpos(struct st_softc *, int, u_int32_t *); 344 345 static const struct scsipi_periphsw st_switch = { 346 st_interpret_sense, 347 ststart, 348 NULL, 349 stdone 350 }; 351 352 #if defined(ST_ENABLE_EARLYWARN) 353 #define ST_INIT_FLAGS ST_EARLYWARN 354 #else 355 #define ST_INIT_FLAGS 0 356 #endif 357 358 /* 359 * The routine called by the low level scsi routine when it discovers 360 * A device suitable for this driver 361 */ 362 void 363 stattach(struct device *parent, struct st_softc *st, void *aux) 364 { 365 struct scsipibus_attach_args *sa = aux; 366 struct scsipi_periph *periph = sa->sa_periph; 367 368 SC_DEBUG(periph, SCSIPI_DB2, ("stattach: ")); 369 370 /* 371 * Store information needed to contact our base driver 372 */ 373 st->sc_periph = periph; 374 periph->periph_dev = &st->sc_dev; 375 periph->periph_switch = &st_switch; 376 377 /* 378 * Set initial flags 379 */ 380 381 st->flags = ST_INIT_FLAGS; 382 383 /* 384 * Set up the buf queue for this device 385 */ 386 bufq_alloc(&st->buf_queue, "fcfs", 0); 387 388 callout_init(&st->sc_callout); 389 390 /* 391 * Check if the drive is a known criminal and take 392 * Any steps needed to bring it into line 393 */ 394 st_identify_drive(st, &sa->sa_inqbuf); 395 /* 396 * Use the subdriver to request information regarding the drive. 397 */ 398 printf("\n"); 399 printf("%s: %s", st->sc_dev.dv_xname, st->quirkdata ? "quirks apply, " : ""); 400 if (scsipi_test_unit_ready(periph, 401 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE) || 402 st->ops(st, ST_OPS_MODESENSE, 403 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE)) 404 printf("drive empty\n"); 405 else { 406 printf("density code %d, ", st->media_density); 407 if (st->media_blksize > 0) 408 printf("%d-byte", st->media_blksize); 409 else 410 printf("variable"); 411 printf(" blocks, write-%s\n", 412 (st->flags & ST_READONLY) ? "protected" : "enabled"); 413 } 414 415 st->stats = iostat_alloc(IOSTAT_TAPE, parent, st->sc_dev.dv_xname); 416 417 #if NRND > 0 418 rnd_attach_source(&st->rnd_source, st->sc_dev.dv_xname, 419 RND_TYPE_TAPE, 0); 420 #endif 421 } 422 423 int 424 stactivate(struct device *self, enum devact act) 425 { 426 int rv = 0; 427 428 switch (act) { 429 case DVACT_ACTIVATE: 430 rv = EOPNOTSUPP; 431 break; 432 433 case DVACT_DEACTIVATE: 434 /* 435 * Nothing to do; we key off the device's DVF_ACTIVE. 436 */ 437 break; 438 } 439 return (rv); 440 } 441 442 int 443 stdetach(struct device *self, int flags) 444 { 445 struct st_softc *st = device_private(self); 446 int s, bmaj, cmaj, mn; 447 448 /* locate the major number */ 449 bmaj = bdevsw_lookup_major(&st_bdevsw); 450 cmaj = cdevsw_lookup_major(&st_cdevsw); 451 452 /* kill any pending restart */ 453 callout_stop(&st->sc_callout); 454 455 s = splbio(); 456 457 /* Kill off any queued buffers. */ 458 bufq_drain(st->buf_queue); 459 460 bufq_free(st->buf_queue); 461 462 /* Kill off any pending commands. */ 463 scsipi_kill_pending(st->sc_periph); 464 465 splx(s); 466 467 /* Nuke the vnodes for any open instances */ 468 mn = STUNIT(device_unit(self)); 469 vdevgone(bmaj, mn, mn+STNMINOR-1, VBLK); 470 vdevgone(cmaj, mn, mn+STNMINOR-1, VCHR); 471 472 iostat_free(st->stats); 473 474 #if NRND > 0 475 /* Unhook the entropy source. */ 476 rnd_detach_source(&st->rnd_source); 477 #endif 478 479 return (0); 480 } 481 482 /* 483 * Use the inquiry routine in 'scsi_base' to get drive info so we can 484 * Further tailor our behaviour. 485 */ 486 static void 487 st_identify_drive(struct st_softc *st, struct scsipi_inquiry_pattern *inqbuf) 488 { 489 const struct st_quirk_inquiry_pattern *finger; 490 int priority; 491 492 finger = scsipi_inqmatch(inqbuf, 493 st_quirk_patterns, 494 sizeof(st_quirk_patterns) / sizeof(st_quirk_patterns[0]), 495 sizeof(st_quirk_patterns[0]), &priority); 496 if (priority != 0) { 497 st->quirkdata = &finger->quirkdata; 498 st->drive_quirks = finger->quirkdata.quirks; 499 st->quirks = finger->quirkdata.quirks; /* start value */ 500 st->page_0_size = finger->quirkdata.page_0_size; 501 st_loadquirks(st); 502 } 503 } 504 505 /* 506 * initialise the subdevices to the default (QUIRK) state. 507 * this will remove any setting made by the system operator or previous 508 * operations. 509 */ 510 static void 511 st_loadquirks(struct st_softc *st) 512 { 513 int i; 514 const struct modes *mode; 515 struct modes *mode2; 516 517 mode = st->quirkdata->modes; 518 mode2 = st->modes; 519 for (i = 0; i < 4; i++) { 520 memset(mode2, 0, sizeof(struct modes)); 521 st->modeflags[i] &= ~(BLKSIZE_SET_BY_QUIRK | 522 DENSITY_SET_BY_QUIRK | BLKSIZE_SET_BY_USER | 523 DENSITY_SET_BY_USER); 524 if ((mode->quirks | st->drive_quirks) & ST_Q_FORCE_BLKSIZE) { 525 mode2->blksize = mode->blksize; 526 st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; 527 } 528 if (mode->density) { 529 mode2->density = mode->density; 530 st->modeflags[i] |= DENSITY_SET_BY_QUIRK; 531 } 532 mode2->quirks |= mode->quirks; 533 mode++; 534 mode2++; 535 } 536 } 537 538 /* 539 * open the device. 540 */ 541 static int 542 stopen(dev_t dev, int flags, int mode, struct lwp *l) 543 { 544 u_int stmode, dsty; 545 int error, sflags, unit, tries, ntries; 546 struct st_softc *st; 547 struct scsipi_periph *periph; 548 struct scsipi_adapter *adapt; 549 550 unit = STUNIT(dev); 551 if (unit >= st_cd.cd_ndevs) 552 return (ENXIO); 553 st = st_cd.cd_devs[unit]; 554 if (st == NULL) 555 return (ENXIO); 556 557 stmode = STMODE(dev); 558 dsty = STDSTY(dev); 559 560 periph = st->sc_periph; 561 adapt = periph->periph_channel->chan_adapter; 562 563 SC_DEBUG(periph, SCSIPI_DB1, ("open: dev=0x%x (unit %d (of %d))\n", dev, 564 unit, st_cd.cd_ndevs)); 565 566 567 /* 568 * Only allow one at a time 569 */ 570 if (periph->periph_flags & PERIPH_OPEN) { 571 printf("%s: already open\n", st->sc_dev.dv_xname); 572 return (EBUSY); 573 } 574 575 if ((error = scsipi_adapter_addref(adapt)) != 0) 576 return (error); 577 578 /* 579 * clear any latched errors. 580 */ 581 st->mt_resid = 0; 582 st->mt_erreg = 0; 583 st->asc = 0; 584 st->ascq = 0; 585 586 /* 587 * Catch any unit attention errors. Be silent about this 588 * unless we're already mounted. We ignore media change 589 * if we're in control mode or not mounted yet. 590 */ 591 if ((st->flags & ST_MOUNTED) == 0 || stmode == CTRL_MODE) { 592 #ifdef SCSIDEBUG 593 sflags = XS_CTL_IGNORE_MEDIA_CHANGE; 594 #else 595 sflags = XS_CTL_SILENT|XS_CTL_IGNORE_MEDIA_CHANGE; 596 #endif 597 } else 598 sflags = 0; 599 600 /* 601 * If we're already mounted or we aren't configured for 602 * a mount delay, only try a test unit ready once. Otherwise, 603 * try up to ST_MOUNT_DELAY times with a rest interval of 604 * one second between each try. 605 */ 606 607 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0) { 608 ntries = 1; 609 } else { 610 ntries = ST_MOUNT_DELAY; 611 } 612 613 for (error = tries = 0; tries < ntries; tries++) { 614 int slpintr, oflags; 615 616 /* 617 * If we had no error, or we're opening the control mode 618 * device, we jump out right away. 619 */ 620 621 error = scsipi_test_unit_ready(periph, sflags); 622 if (error == 0 || stmode == CTRL_MODE) { 623 break; 624 } 625 626 /* 627 * We had an error. 628 * 629 * If we're already mounted or we aren't configured for 630 * a mount delay, or the error isn't a NOT READY error, 631 * skip to the error exit now. 632 */ 633 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0 || 634 (st->mt_key != SKEY_NOT_READY)) { 635 goto bad; 636 } 637 638 /* 639 * clear any latched errors. 640 */ 641 st->mt_resid = 0; 642 st->mt_erreg = 0; 643 st->asc = 0; 644 st->ascq = 0; 645 646 /* 647 * Fake that we have the device open so 648 * we block other apps from getting in. 649 */ 650 651 oflags = periph->periph_flags; 652 periph->periph_flags |= PERIPH_OPEN; 653 654 slpintr = tsleep(&lbolt, PUSER|PCATCH, "stload", 0); 655 656 periph->periph_flags = oflags; /* restore flags */ 657 if (slpintr) { 658 goto bad; 659 } 660 } 661 662 663 /* 664 * If the mode is 3 (e.g. minor = 3,7,11,15) then the device has 665 * been opened to set defaults and perform other, usually non-I/O 666 * related, operations. In this case, do a quick check to see 667 * whether the unit actually had a tape loaded (this will be known 668 * as to whether or not we got a NOT READY for the above 669 * unit attention). If a tape is there, go do a mount sequence. 670 */ 671 if (stmode == CTRL_MODE && st->mt_key == SKEY_NOT_READY) { 672 periph->periph_flags |= PERIPH_OPEN; 673 return (0); 674 } 675 676 /* 677 * If we get this far and had an error set, that means we failed 678 * to pass the 'test unit ready' test for the non-controlmode device, 679 * so we bounce the open. 680 */ 681 682 if (error) 683 return (error); 684 685 /* 686 * Else, we're now committed to saying we're open. 687 */ 688 689 periph->periph_flags |= PERIPH_OPEN; /* unit attn are now errors */ 690 691 /* 692 * If it's a different mode, or if the media has been 693 * invalidated, unmount the tape from the previous 694 * session but continue with open processing 695 */ 696 if (st->last_dsty != dsty || 697 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 698 st_unmount(st, NOEJECT); 699 700 /* 701 * If we are not mounted, then we should start a new 702 * mount session. 703 */ 704 if (!(st->flags & ST_MOUNTED)) { 705 if ((error = st_mount_tape(dev, flags)) != 0) 706 goto bad; 707 st->last_dsty = dsty; 708 } 709 if (!(st->quirks & ST_Q_NOPREVENT)) { 710 scsipi_prevent(periph, SPAMR_PREVENT_DT, 711 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 712 } 713 714 SC_DEBUG(periph, SCSIPI_DB2, ("open complete\n")); 715 return (0); 716 717 bad: 718 st_unmount(st, NOEJECT); 719 scsipi_adapter_delref(adapt); 720 periph->periph_flags &= ~PERIPH_OPEN; 721 return (error); 722 } 723 724 /* 725 * close the device.. only called if we are the LAST 726 * occurence of an open device 727 */ 728 static int 729 stclose(dev_t dev, int flags, int mode, struct lwp *l) 730 { 731 int stxx, error = 0; 732 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 733 struct scsipi_periph *periph = st->sc_periph; 734 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 735 736 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("closing\n")); 737 738 /* 739 * Make sure that a tape opened in write-only mode will have 740 * file marks written on it when closed, even if not written to. 741 * 742 * This is for SUN compatibility. Actually, the Sun way of 743 * things is to: 744 * 745 * only write filemarks if there are fmks to be written and 746 * - open for write (possibly read/write) 747 * - the last operation was a write 748 * or: 749 * - opened for wronly 750 * - no data was written (including filemarks) 751 */ 752 753 stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); 754 if (((flags & FWRITE) && stxx == ST_WRITTEN) || 755 ((flags & O_ACCMODE) == FWRITE && stxx == 0)) { 756 int nm; 757 error = st_check_eod(st, FALSE, &nm, 0); 758 } 759 760 /* 761 * Allow robots to eject tape if needed. 762 */ 763 scsipi_prevent(periph, SPAMR_ALLOW, 764 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 765 766 switch (STMODE(dev)) { 767 case NORMAL_MODE: 768 st_unmount(st, NOEJECT); 769 break; 770 case NOREW_MODE: 771 case CTRL_MODE: 772 /* 773 * Leave mounted unless media seems to have been removed. 774 * 775 * Otherwise, if we're to terminate a tape with more than one 776 * filemark [ and because we're not rewinding here ], backspace 777 * one filemark so that later appends will see an unbroken 778 * sequence of: 779 * 780 * file - FMK - file - FMK ... file - FMK FMK (EOM) 781 */ 782 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 783 st_unmount(st, NOEJECT); 784 } else if (error == 0) { 785 /* 786 * ST_WRITTEN was preserved from above. 787 * 788 * All we need to know here is: 789 * 790 * Were we writing this tape and was the last 791 * operation a write? 792 * 793 * Are there supposed to be 2FM at EOD? 794 * 795 * If both statements are true, then we backspace 796 * one filemark. 797 */ 798 stxx |= (st->flags & ST_2FM_AT_EOD); 799 if ((flags & FWRITE) != 0 && 800 (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { 801 error = st_space(st, -1, SP_FILEMARKS, 0); 802 } 803 } 804 break; 805 case EJECT_MODE: 806 st_unmount(st, EJECT); 807 break; 808 } 809 810 scsipi_wait_drain(periph); 811 812 scsipi_adapter_delref(adapt); 813 periph->periph_flags &= ~PERIPH_OPEN; 814 815 return (error); 816 } 817 818 /* 819 * Start a new mount session. 820 * Copy in all the default parameters from the selected device mode. 821 * and try guess any that seem to be defaulted. 822 */ 823 static int 824 st_mount_tape(dev_t dev, int flags) 825 { 826 int unit; 827 u_int dsty; 828 struct st_softc *st; 829 struct scsipi_periph *periph; 830 int error = 0; 831 832 unit = STUNIT(dev); 833 dsty = STDSTY(dev); 834 st = st_cd.cd_devs[unit]; 835 periph = st->sc_periph; 836 837 if (st->flags & ST_MOUNTED) 838 return (0); 839 840 SC_DEBUG(periph, SCSIPI_DB1, ("mounting\n ")); 841 st->flags |= ST_NEW_MOUNT; 842 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 843 /* 844 * If the media is new, then make sure we give it a chance to 845 * to do a 'load' instruction. (We assume it is new.) 846 */ 847 if ((error = st_load(st, LD_LOAD, XS_CTL_SILENT)) != 0) 848 return (error); 849 /* 850 * Throw another dummy instruction to catch 851 * 'Unit attention' errors. Many drives give 852 * these after doing a Load instruction (with 853 * the MEDIUM MAY HAVE CHANGED asc/ascq). 854 */ 855 scsipi_test_unit_ready(periph, XS_CTL_SILENT); /* XXX */ 856 857 /* 858 * Some devices can't tell you much until they have been 859 * asked to look at the media. This quirk does this. 860 */ 861 if (st->quirks & ST_Q_SENSE_HELP) 862 if ((error = st_touch_tape(st)) != 0) 863 return (error); 864 /* 865 * Load the physical device parameters 866 * loads: blkmin, blkmax 867 */ 868 if ((error = st->ops(st, ST_OPS_RBL, 0)) != 0) 869 return (error); 870 /* 871 * Load the media dependent parameters 872 * includes: media_blksize,media_density,numblks 873 * As we have a tape in, it should be reflected here. 874 * If not you may need the "quirk" above. 875 */ 876 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 877 return (error); 878 /* 879 * If we have gained a permanent density from somewhere, 880 * then use it in preference to the one supplied by 881 * default by the driver. 882 */ 883 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 884 st->density = st->modes[dsty].density; 885 else 886 st->density = st->media_density; 887 /* 888 * If we have gained a permanent blocksize 889 * then use it in preference to the one supplied by 890 * default by the driver. 891 */ 892 st->flags &= ~ST_FIXEDBLOCKS; 893 if (st->modeflags[dsty] & 894 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 895 st->blksize = st->modes[dsty].blksize; 896 if (st->blksize) 897 st->flags |= ST_FIXEDBLOCKS; 898 } else { 899 if ((error = st_decide_mode(st, FALSE)) != 0) 900 return (error); 901 } 902 if ((error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 903 /* ATAPI will return ENODEV for this, and this may be OK */ 904 if (error != ENODEV) { 905 printf("%s: cannot set selected mode\n", 906 st->sc_dev.dv_xname); 907 return (error); 908 } 909 } 910 st->flags &= ~ST_NEW_MOUNT; 911 st->flags |= ST_MOUNTED; 912 periph->periph_flags |= PERIPH_MEDIA_LOADED; /* move earlier? */ 913 st->blkno = st->fileno = (daddr_t) 0; 914 return (0); 915 } 916 917 /* 918 * End the present mount session. 919 * Rewind, and optionally eject the tape. 920 * Reset various flags to indicate that all new 921 * operations require another mount operation 922 */ 923 static void 924 st_unmount(struct st_softc *st, boolean eject) 925 { 926 struct scsipi_periph *periph = st->sc_periph; 927 int nmarks; 928 929 if ((st->flags & ST_MOUNTED) == 0) 930 return; 931 SC_DEBUG(periph, SCSIPI_DB1, ("unmounting\n")); 932 st_check_eod(st, FALSE, &nmarks, XS_CTL_IGNORE_NOT_READY); 933 st_rewind(st, 0, XS_CTL_IGNORE_NOT_READY); 934 935 /* 936 * Section 9.3.3 of the SCSI specs states that a device shall return 937 * the density value specified in the last succesfull MODE SELECT 938 * after an unload operation, in case it is not able to 939 * automatically determine the density of the new medium. 940 * 941 * So we instruct the device to use the default density, which will 942 * prevent the use of stale density values (in particular, 943 * in st_touch_tape(). 944 */ 945 st->density = 0; 946 if (st->ops(st, ST_OPS_MODESELECT, 0) != 0) { 947 printf("%s: WARNING: cannot revert to default density\n", 948 st->sc_dev.dv_xname); 949 } 950 951 if (eject) { 952 if (!(st->quirks & ST_Q_NOPREVENT)) { 953 scsipi_prevent(periph, SPAMR_ALLOW, 954 XS_CTL_IGNORE_ILLEGAL_REQUEST | 955 XS_CTL_IGNORE_NOT_READY); 956 } 957 st_load(st, LD_UNLOAD, XS_CTL_IGNORE_NOT_READY); 958 st->blkno = st->fileno = (daddr_t) -1; 959 } else { 960 st->blkno = st->fileno = (daddr_t) 0; 961 } 962 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 963 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 964 } 965 966 /* 967 * Given all we know about the device, media, mode, 'quirks' and 968 * initial operation, make a decision as to how we should be set 969 * to run (regarding blocking and EOD marks) 970 */ 971 int 972 st_decide_mode(struct st_softc *st, boolean first_read) 973 { 974 975 SC_DEBUG(st->sc_periph, SCSIPI_DB2, ("starting block mode decision\n")); 976 977 /* 978 * If the drive can only handle fixed-length blocks and only at 979 * one size, perhaps we should just do that. 980 */ 981 if (st->blkmin && (st->blkmin == st->blkmax)) { 982 st->flags |= ST_FIXEDBLOCKS; 983 st->blksize = st->blkmin; 984 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 985 ("blkmin == blkmax of %d\n", st->blkmin)); 986 goto done; 987 } 988 /* 989 * If the tape density mandates (or even suggests) use of fixed 990 * or variable-length blocks, comply. 991 */ 992 switch (st->density) { 993 case HALFINCH_800: 994 case HALFINCH_1600: 995 case HALFINCH_6250: 996 case DDS: 997 st->flags &= ~ST_FIXEDBLOCKS; 998 st->blksize = 0; 999 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1000 ("density specified variable\n")); 1001 goto done; 1002 case QIC_11: 1003 case QIC_24: 1004 case QIC_120: 1005 case QIC_150: 1006 case QIC_525: 1007 case QIC_1320: 1008 case QIC_3095: 1009 case QIC_3220: 1010 st->flags |= ST_FIXEDBLOCKS; 1011 if (st->media_blksize > 0) 1012 st->blksize = st->media_blksize; 1013 else 1014 st->blksize = DEF_FIXED_BSIZE; 1015 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1016 ("density specified fixed\n")); 1017 goto done; 1018 } 1019 /* 1020 * If we're about to read the tape, perhaps we should choose 1021 * fixed or variable-length blocks and block size according to 1022 * what the drive found on the tape. 1023 */ 1024 if (first_read && 1025 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 1026 (st->media_blksize == DEF_FIXED_BSIZE) || 1027 (st->media_blksize == 1024))) { 1028 if (st->media_blksize > 0) 1029 st->flags |= ST_FIXEDBLOCKS; 1030 else 1031 st->flags &= ~ST_FIXEDBLOCKS; 1032 st->blksize = st->media_blksize; 1033 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1034 ("Used media_blksize of %d\n", st->media_blksize)); 1035 goto done; 1036 } 1037 /* 1038 * We're getting no hints from any direction. Choose variable- 1039 * length blocks arbitrarily. 1040 */ 1041 st->flags &= ~ST_FIXEDBLOCKS; 1042 st->blksize = 0; 1043 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1044 ("Give up and default to variable mode\n")); 1045 1046 done: 1047 /* 1048 * Decide whether or not to write two file marks to signify end- 1049 * of-data. Make the decision as a function of density. If 1050 * the decision is not to use a second file mark, the SCSI BLANK 1051 * CHECK condition code will be recognized as end-of-data when 1052 * first read. 1053 * (I think this should be a by-product of fixed/variable..julian) 1054 */ 1055 switch (st->density) { 1056 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 1057 case QIC_11: 1058 case QIC_24: 1059 case QIC_120: 1060 case QIC_150: 1061 case QIC_525: 1062 case QIC_1320: 1063 case QIC_3095: 1064 case QIC_3220: 1065 st->flags &= ~ST_2FM_AT_EOD; 1066 break; 1067 default: 1068 st->flags |= ST_2FM_AT_EOD; 1069 } 1070 return (0); 1071 } 1072 1073 /* 1074 * Actually translate the requested transfer into 1075 * one the physical driver can understand 1076 * The transfer is described by a buf and will include 1077 * only one physical transfer. 1078 */ 1079 static void 1080 ststrategy(struct buf *bp) 1081 { 1082 struct st_softc *st = st_cd.cd_devs[STUNIT(bp->b_dev)]; 1083 int s; 1084 1085 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1086 ("ststrategy %d bytes @ blk %" PRId64 "\n", bp->b_bcount, bp->b_blkno)); 1087 /* 1088 * If it's a null transfer, return immediatly 1089 */ 1090 if (bp->b_bcount == 0) 1091 goto done; 1092 1093 /* If offset is negative, error */ 1094 if (bp->b_blkno < 0) { 1095 bp->b_error = EINVAL; 1096 goto bad; 1097 } 1098 1099 /* 1100 * Odd sized request on fixed drives are verboten 1101 */ 1102 if (st->flags & ST_FIXEDBLOCKS) { 1103 if (bp->b_bcount % st->blksize) { 1104 printf("%s: bad request, must be multiple of %d\n", 1105 st->sc_dev.dv_xname, st->blksize); 1106 bp->b_error = EIO; 1107 goto bad; 1108 } 1109 } 1110 /* 1111 * as are out-of-range requests on variable drives. 1112 */ 1113 else if (bp->b_bcount < st->blkmin || 1114 (st->blkmax && bp->b_bcount > st->blkmax)) { 1115 printf("%s: bad request, must be between %d and %d\n", 1116 st->sc_dev.dv_xname, st->blkmin, st->blkmax); 1117 bp->b_error = EIO; 1118 goto bad; 1119 } 1120 s = splbio(); 1121 1122 /* 1123 * Place it in the queue of activities for this tape 1124 * at the end (a bit silly because we only have on user.. 1125 * (but it could fork())) 1126 */ 1127 BUFQ_PUT(st->buf_queue, bp); 1128 1129 /* 1130 * Tell the device to get going on the transfer if it's 1131 * not doing anything, otherwise just wait for completion 1132 * (All a bit silly if we're only allowing 1 open but..) 1133 */ 1134 ststart(st->sc_periph); 1135 1136 splx(s); 1137 return; 1138 bad: 1139 bp->b_flags |= B_ERROR; 1140 done: 1141 /* 1142 * Correctly set the buf to indicate a completed xfer 1143 */ 1144 bp->b_resid = bp->b_bcount; 1145 biodone(bp); 1146 return; 1147 } 1148 1149 /* 1150 * ststart looks to see if there is a buf waiting for the device 1151 * and that the device is not already busy. If both are true, 1152 * It dequeues the buf and creates a scsi command to perform the 1153 * transfer required. The transfer request will call scsipi_done 1154 * on completion, which will in turn call this routine again 1155 * so that the next queued transfer is performed. 1156 * The bufs are queued by the strategy routine (ststrategy) 1157 * 1158 * This routine is also called after other non-queued requests 1159 * have been made of the scsi driver, to ensure that the queue 1160 * continues to be drained. 1161 * ststart() is called at splbio 1162 */ 1163 static void 1164 ststart(struct scsipi_periph *periph) 1165 { 1166 struct st_softc *st = (void *)periph->periph_dev; 1167 struct buf *bp; 1168 struct scsi_rw_tape cmd; 1169 struct scsipi_xfer *xs; 1170 int flags, error; 1171 1172 SC_DEBUG(periph, SCSIPI_DB2, ("ststart ")); 1173 /* 1174 * See if there is a buf to do and we are not already 1175 * doing one 1176 */ 1177 while (periph->periph_active < periph->periph_openings) { 1178 /* if a special awaits, let it proceed first */ 1179 if (periph->periph_flags & PERIPH_WAITING) { 1180 periph->periph_flags &= ~PERIPH_WAITING; 1181 wakeup((caddr_t)periph); 1182 return; 1183 } 1184 1185 /* 1186 * If the device has been unmounted by the user 1187 * then throw away all requests until done. 1188 */ 1189 if (__predict_false((st->flags & ST_MOUNTED) == 0 || 1190 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0)) { 1191 if ((bp = BUFQ_GET(st->buf_queue)) != NULL) { 1192 /* make sure that one implies the other.. */ 1193 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 1194 bp->b_flags |= B_ERROR; 1195 bp->b_error = EIO; 1196 bp->b_resid = bp->b_bcount; 1197 biodone(bp); 1198 continue; 1199 } else { 1200 return; 1201 } 1202 } 1203 1204 if ((bp = BUFQ_PEEK(st->buf_queue)) == NULL) 1205 return; 1206 1207 iostat_busy(st->stats); 1208 1209 /* 1210 * only FIXEDBLOCK devices have pending I/O or space operations. 1211 */ 1212 if (st->flags & ST_FIXEDBLOCKS) { 1213 /* 1214 * If we are at a filemark but have not reported it yet 1215 * then we should report it now 1216 */ 1217 if (st->flags & ST_AT_FILEMARK) { 1218 if ((bp->b_flags & B_READ) == B_WRITE) { 1219 /* 1220 * Handling of ST_AT_FILEMARK in 1221 * st_space will fill in the right file 1222 * mark count. 1223 * Back up over filemark 1224 */ 1225 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1226 BUFQ_GET(st->buf_queue); 1227 bp->b_flags |= B_ERROR; 1228 bp->b_error = EIO; 1229 biodone(bp); 1230 continue; 1231 } 1232 } else { 1233 BUFQ_GET(st->buf_queue); 1234 bp->b_resid = bp->b_bcount; 1235 bp->b_error = 0; 1236 bp->b_flags &= ~B_ERROR; 1237 st->flags &= ~ST_AT_FILEMARK; 1238 biodone(bp); 1239 continue; /* seek more work */ 1240 } 1241 } 1242 } 1243 /* 1244 * If we are at EOM but have not reported it 1245 * yet then we should report it now. 1246 */ 1247 if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { 1248 BUFQ_GET(st->buf_queue); 1249 bp->b_resid = bp->b_bcount; 1250 if (st->flags & ST_EIO_PENDING) { 1251 bp->b_error = EIO; 1252 bp->b_flags |= B_ERROR; 1253 } 1254 st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); 1255 biodone(bp); 1256 continue; /* seek more work */ 1257 } 1258 1259 /* 1260 * Fill out the scsi command 1261 */ 1262 memset(&cmd, 0, sizeof(cmd)); 1263 flags = XS_CTL_NOSLEEP | XS_CTL_ASYNC; 1264 if ((bp->b_flags & B_READ) == B_WRITE) { 1265 cmd.opcode = WRITE; 1266 st->flags &= ~ST_FM_WRITTEN; 1267 flags |= XS_CTL_DATA_OUT; 1268 } else { 1269 cmd.opcode = READ; 1270 flags |= XS_CTL_DATA_IN; 1271 } 1272 1273 /* 1274 * Handle "fixed-block-mode" tape drives by using the 1275 * block count instead of the length. 1276 */ 1277 if (st->flags & ST_FIXEDBLOCKS) { 1278 cmd.byte2 |= SRW_FIXED; 1279 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1280 } else 1281 _lto3b(bp->b_bcount, cmd.len); 1282 1283 /* 1284 * Clear 'position updated' indicator 1285 */ 1286 st->flags &= ~ST_POSUPDATED; 1287 1288 /* 1289 * go ask the adapter to do all this for us 1290 */ 1291 xs = scsipi_make_xs(periph, 1292 (struct scsipi_generic *)&cmd, sizeof(cmd), 1293 (u_char *)bp->b_data, bp->b_bcount, 1294 0, ST_IO_TIME, bp, flags); 1295 if (__predict_false(xs == NULL)) { 1296 /* 1297 * out of memory. Keep this buffer in the queue, and 1298 * retry later. 1299 */ 1300 callout_reset(&st->sc_callout, hz / 2, strestart, 1301 periph); 1302 return; 1303 } 1304 /* 1305 * need to dequeue the buffer before queuing the command, 1306 * because cdstart may be called recursively from the 1307 * HBA driver 1308 */ 1309 #ifdef DIAGNOSTIC 1310 if (BUFQ_GET(st->buf_queue) != bp) 1311 panic("ststart(): dequeued wrong buf"); 1312 #else 1313 BUFQ_GET(st->buf_queue); 1314 #endif 1315 error = scsipi_execute_xs(xs); 1316 /* with a scsipi_xfer preallocated, scsipi_command can't fail */ 1317 KASSERT(error == 0); 1318 } /* go back and see if we can cram more work in.. */ 1319 } 1320 1321 static void 1322 strestart(void *v) 1323 { 1324 int s = splbio(); 1325 ststart((struct scsipi_periph *)v); 1326 splx(s); 1327 } 1328 1329 1330 static void 1331 stdone(struct scsipi_xfer *xs, int error) 1332 { 1333 struct st_softc *st = (void *)xs->xs_periph->periph_dev; 1334 struct buf *bp = xs->bp; 1335 1336 if (bp) { 1337 bp->b_error = error; 1338 bp->b_resid = xs->resid; 1339 if (error) 1340 bp->b_flags |= B_ERROR; 1341 1342 if ((bp->b_flags & B_READ) == B_WRITE) 1343 st->flags |= ST_WRITTEN; 1344 else 1345 st->flags &= ~ST_WRITTEN; 1346 1347 iostat_unbusy(st->stats, bp->b_bcount, 1348 ((bp->b_flags & B_READ) == B_READ)); 1349 1350 #if NRND > 0 1351 rnd_add_uint32(&st->rnd_source, bp->b_blkno); 1352 #endif 1353 1354 if ((st->flags & ST_POSUPDATED) == 0) { 1355 if (error) { 1356 st->fileno = st->blkno = -1; 1357 } else if (st->blkno != -1) { 1358 if (st->flags & ST_FIXEDBLOCKS) 1359 st->blkno += 1360 (bp->b_bcount / st->blksize); 1361 else 1362 st->blkno++; 1363 } 1364 } 1365 1366 biodone(bp); 1367 } 1368 } 1369 1370 static int 1371 stread(dev_t dev, struct uio *uio, int iomode) 1372 { 1373 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1374 1375 return (physio(ststrategy, NULL, dev, B_READ, 1376 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1377 } 1378 1379 static int 1380 stwrite(dev_t dev, struct uio *uio, int iomode) 1381 { 1382 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1383 1384 return (physio(ststrategy, NULL, dev, B_WRITE, 1385 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1386 } 1387 1388 /* 1389 * Perform special action on behalf of the user; 1390 * knows about the internals of this device 1391 */ 1392 static int 1393 stioctl(dev_t dev, u_long cmd, caddr_t arg, int flag, struct lwp *l) 1394 { 1395 int error = 0; 1396 int unit; 1397 int number, nmarks, dsty; 1398 int flags; 1399 struct st_softc *st; 1400 int hold_blksize; 1401 u_int8_t hold_density; 1402 struct mtop *mt = (struct mtop *) arg; 1403 1404 /* 1405 * Find the device that the user is talking about 1406 */ 1407 flags = 0; /* give error messages, act on errors etc. */ 1408 unit = STUNIT(dev); 1409 dsty = STDSTY(dev); 1410 st = st_cd.cd_devs[unit]; 1411 hold_blksize = st->blksize; 1412 hold_density = st->density; 1413 1414 switch ((u_int) cmd) { 1415 1416 case MTIOCGET: { 1417 struct mtget *g = (struct mtget *) arg; 1418 /* 1419 * (to get the current state of READONLY) 1420 */ 1421 error = st->ops(st, ST_OPS_MODESENSE, XS_CTL_SILENT); 1422 if (error) { 1423 /* 1424 * Ignore the error if in control mode; 1425 * this is mandated by st(4). 1426 */ 1427 if (STMODE(dev) != CTRL_MODE) 1428 break; 1429 error = 0; 1430 } 1431 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("[ioctl: get status]\n")); 1432 memset(g, 0, sizeof(struct mtget)); 1433 g->mt_type = 0x7; /* Ultrix compat *//*? */ 1434 g->mt_blksiz = st->blksize; 1435 g->mt_density = st->density; 1436 g->mt_mblksiz[0] = st->modes[0].blksize; 1437 g->mt_mblksiz[1] = st->modes[1].blksize; 1438 g->mt_mblksiz[2] = st->modes[2].blksize; 1439 g->mt_mblksiz[3] = st->modes[3].blksize; 1440 g->mt_mdensity[0] = st->modes[0].density; 1441 g->mt_mdensity[1] = st->modes[1].density; 1442 g->mt_mdensity[2] = st->modes[2].density; 1443 g->mt_mdensity[3] = st->modes[3].density; 1444 g->mt_fileno = st->fileno; 1445 g->mt_blkno = st->blkno; 1446 if (st->flags & ST_READONLY) 1447 g->mt_dsreg |= MT_DS_RDONLY; 1448 if (st->flags & ST_MOUNTED) 1449 g->mt_dsreg |= MT_DS_MOUNTED; 1450 g->mt_resid = st->mt_resid; 1451 g->mt_erreg = st->mt_erreg; 1452 /* 1453 * clear latched errors. 1454 */ 1455 st->mt_resid = 0; 1456 st->mt_erreg = 0; 1457 st->asc = 0; 1458 st->ascq = 0; 1459 break; 1460 } 1461 case MTIOCTOP: { 1462 1463 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1464 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1465 mt->mt_count)); 1466 1467 /* compat: in U*x it is a short */ 1468 number = mt->mt_count; 1469 switch ((short) (mt->mt_op)) { 1470 case MTWEOF: /* write an end-of-file record */ 1471 error = st_write_filemarks(st, number, flags); 1472 break; 1473 case MTBSF: /* backward space file */ 1474 number = -number; 1475 case MTFSF: /* forward space file */ 1476 error = st_check_eod(st, FALSE, &nmarks, flags); 1477 if (!error) 1478 error = st_space(st, number - nmarks, 1479 SP_FILEMARKS, flags); 1480 break; 1481 case MTBSR: /* backward space record */ 1482 number = -number; 1483 case MTFSR: /* forward space record */ 1484 error = st_check_eod(st, TRUE, &nmarks, flags); 1485 if (!error) 1486 error = st_space(st, number, SP_BLKS, flags); 1487 break; 1488 case MTREW: /* rewind */ 1489 error = st_rewind(st, 0, flags); 1490 break; 1491 case MTOFFL: /* rewind and put the drive offline */ 1492 st_unmount(st, EJECT); 1493 break; 1494 case MTNOP: /* no operation, sets status only */ 1495 break; 1496 case MTRETEN: /* retension the tape */ 1497 error = st_load(st, LD_RETENSION, flags); 1498 if (!error) 1499 error = st_load(st, LD_LOAD, flags); 1500 break; 1501 case MTEOM: /* forward space to end of media */ 1502 error = st_check_eod(st, FALSE, &nmarks, flags); 1503 if (!error) 1504 error = st_space(st, 1, SP_EOM, flags); 1505 break; 1506 case MTCACHE: /* enable controller cache */ 1507 st->flags &= ~ST_DONTBUFFER; 1508 goto try_new_value; 1509 case MTNOCACHE: /* disable controller cache */ 1510 st->flags |= ST_DONTBUFFER; 1511 goto try_new_value; 1512 case MTERASE: /* erase volume */ 1513 error = st_erase(st, number, flags); 1514 break; 1515 case MTSETBSIZ: /* Set block size for device */ 1516 #ifdef NOTYET 1517 if (!(st->flags & ST_NEW_MOUNT)) { 1518 uprintf("re-mount tape before changing blocksize"); 1519 error = EINVAL; 1520 break; 1521 } 1522 #endif 1523 if (number == 0) 1524 st->flags &= ~ST_FIXEDBLOCKS; 1525 else { 1526 if ((st->blkmin || st->blkmax) && 1527 (number < st->blkmin || 1528 number > st->blkmax)) { 1529 error = EINVAL; 1530 break; 1531 } 1532 st->flags |= ST_FIXEDBLOCKS; 1533 } 1534 st->blksize = number; 1535 st->flags |= ST_BLOCK_SET; /*XXX */ 1536 goto try_new_value; 1537 1538 case MTSETDNSTY: /* Set density for device and mode */ 1539 /* 1540 * Any number >= 0 and <= 0xff is legal. Numbers 1541 * above 0x80 are 'vendor unique'. 1542 */ 1543 if (number < 0 || number > 255) { 1544 error = EINVAL; 1545 break; 1546 } else 1547 st->density = number; 1548 goto try_new_value; 1549 1550 case MTCMPRESS: 1551 error = st->ops(st, (number == 0) ? 1552 ST_OPS_CMPRSS_OFF : ST_OPS_CMPRSS_ON, 1553 XS_CTL_SILENT); 1554 break; 1555 1556 case MTEWARN: 1557 if (number) 1558 st->flags |= ST_EARLYWARN; 1559 else 1560 st->flags &= ~ST_EARLYWARN; 1561 break; 1562 1563 default: 1564 error = EINVAL; 1565 } 1566 break; 1567 } 1568 case MTIOCIEOT: 1569 case MTIOCEEOT: 1570 break; 1571 1572 case MTIOCRDSPOS: 1573 error = st_rdpos(st, 0, (u_int32_t *) arg); 1574 break; 1575 1576 case MTIOCRDHPOS: 1577 error = st_rdpos(st, 1, (u_int32_t *) arg); 1578 break; 1579 1580 case MTIOCSLOCATE: 1581 error = st_setpos(st, 0, (u_int32_t *) arg); 1582 break; 1583 1584 case MTIOCHLOCATE: 1585 error = st_setpos(st, 1, (u_int32_t *) arg); 1586 break; 1587 1588 1589 default: 1590 error = scsipi_do_ioctl(st->sc_periph, dev, cmd, arg, 1591 flag, l); 1592 break; 1593 } 1594 return (error); 1595 /*-----------------------------*/ 1596 try_new_value: 1597 /* 1598 * Check that the mode being asked for is aggreeable to the 1599 * drive. If not, put it back the way it was. 1600 * 1601 * If in control mode, we can make (persistent) mode changes 1602 * even if no medium is loaded (see st(4)). 1603 */ 1604 if ((STMODE(dev) != CTRL_MODE || (st->flags & ST_MOUNTED) != 0) && 1605 (error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 1606 /* put it back as it was */ 1607 printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); 1608 st->density = hold_density; 1609 st->blksize = hold_blksize; 1610 if (st->blksize) 1611 st->flags |= ST_FIXEDBLOCKS; 1612 else 1613 st->flags &= ~ST_FIXEDBLOCKS; 1614 return (error); 1615 } 1616 /* 1617 * As the drive liked it, if we are setting a new default, 1618 * set it into the structures as such. 1619 * 1620 * The means for deciding this are not finalised yet- but 1621 * if the device was opened in Control Mode, the values 1622 * are persistent now across mounts. 1623 */ 1624 if (STMODE(dev) == CTRL_MODE) { 1625 switch ((short) (mt->mt_op)) { 1626 case MTSETBSIZ: 1627 st->modes[dsty].blksize = st->blksize; 1628 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1629 break; 1630 case MTSETDNSTY: 1631 st->modes[dsty].density = st->density; 1632 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1633 break; 1634 } 1635 } 1636 return (0); 1637 } 1638 1639 /* 1640 * Do a synchronous read. 1641 */ 1642 static int 1643 st_read(struct st_softc *st, char *bf, int size, int flags) 1644 { 1645 struct scsi_rw_tape cmd; 1646 1647 /* 1648 * If it's a null transfer, return immediatly 1649 */ 1650 if (size == 0) 1651 return (0); 1652 memset(&cmd, 0, sizeof(cmd)); 1653 cmd.opcode = READ; 1654 if (st->flags & ST_FIXEDBLOCKS) { 1655 cmd.byte2 |= SRW_FIXED; 1656 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1657 cmd.len); 1658 } else 1659 _lto3b(size, cmd.len); 1660 return (scsipi_command(st->sc_periph, 1661 (void *)&cmd, sizeof(cmd), (void *)bf, size, 0, ST_IO_TIME, NULL, 1662 flags | XS_CTL_DATA_IN)); 1663 } 1664 1665 /* 1666 * issue an erase command 1667 */ 1668 static int 1669 st_erase(struct st_softc *st, int full, int flags) 1670 { 1671 int tmo; 1672 struct scsi_erase cmd; 1673 1674 /* 1675 * Full erase means set LONG bit in erase command, which asks 1676 * the drive to erase the entire unit. Without this bit, we're 1677 * asking the drive to write an erase gap. 1678 */ 1679 memset(&cmd, 0, sizeof(cmd)); 1680 cmd.opcode = ERASE; 1681 if (full) { 1682 cmd.byte2 = SE_LONG; 1683 tmo = ST_SPC_TIME; 1684 } else { 1685 tmo = ST_IO_TIME; 1686 } 1687 1688 /* 1689 * XXX We always do this asynchronously, for now, unless the device 1690 * has the ST_Q_ERASE_NOIMM quirk. How long should we wait if we 1691 * want to (eventually) to it synchronously? 1692 */ 1693 if ((st->quirks & ST_Q_ERASE_NOIMM) == 0) 1694 cmd.byte2 |= SE_IMMED; 1695 1696 return (scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1697 ST_RETRIES, tmo, NULL, flags)); 1698 } 1699 1700 /* 1701 * skip N blocks/filemarks/seq filemarks/eom 1702 */ 1703 static int 1704 st_space(struct st_softc *st, int number, u_int what, int flags) 1705 { 1706 struct scsi_space cmd; 1707 int error; 1708 1709 switch (what) { 1710 case SP_BLKS: 1711 if (st->flags & ST_PER_ACTION) { 1712 if (number > 0) { 1713 st->flags &= ~ST_PER_ACTION; 1714 return (EIO); 1715 } else if (number < 0) { 1716 if (st->flags & ST_AT_FILEMARK) { 1717 /* 1718 * Handling of ST_AT_FILEMARK 1719 * in st_space will fill in the 1720 * right file mark count. 1721 */ 1722 error = st_space(st, 0, SP_FILEMARKS, 1723 flags); 1724 if (error) 1725 return (error); 1726 } 1727 if (st->flags & ST_BLANK_READ) { 1728 st->flags &= ~ST_BLANK_READ; 1729 return (EIO); 1730 } 1731 st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); 1732 } 1733 } 1734 break; 1735 case SP_FILEMARKS: 1736 if (st->flags & ST_EIO_PENDING) { 1737 if (number > 0) { 1738 /* pretend we just discovered the error */ 1739 st->flags &= ~ST_EIO_PENDING; 1740 return (EIO); 1741 } else if (number < 0) { 1742 /* back away from the error */ 1743 st->flags &= ~ST_EIO_PENDING; 1744 } 1745 } 1746 if (st->flags & ST_AT_FILEMARK) { 1747 st->flags &= ~ST_AT_FILEMARK; 1748 number--; 1749 } 1750 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 1751 /* back away from unwritten tape */ 1752 st->flags &= ~ST_BLANK_READ; 1753 number++; /* XXX dubious */ 1754 } 1755 break; 1756 case SP_EOM: 1757 if (st->flags & ST_EOM_PENDING) { 1758 /* we're already there */ 1759 st->flags &= ~ST_EOM_PENDING; 1760 return (0); 1761 } 1762 if (st->flags & ST_EIO_PENDING) { 1763 /* pretend we just discovered the error */ 1764 st->flags &= ~ST_EIO_PENDING; 1765 return (EIO); 1766 } 1767 if (st->flags & ST_AT_FILEMARK) 1768 st->flags &= ~ST_AT_FILEMARK; 1769 break; 1770 } 1771 if (number == 0) 1772 return (0); 1773 1774 memset(&cmd, 0, sizeof(cmd)); 1775 cmd.opcode = SPACE; 1776 cmd.byte2 = what; 1777 _lto3b(number, cmd.number); 1778 1779 st->flags &= ~ST_POSUPDATED; 1780 st->last_ctl_resid = 0; 1781 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1782 0, ST_SPC_TIME, NULL, flags); 1783 1784 if (error == 0 && (st->flags & ST_POSUPDATED) == 0) { 1785 number = number - st->last_ctl_resid; 1786 if (what == SP_BLKS) { 1787 if (st->blkno != -1) { 1788 st->blkno += number; 1789 } 1790 } else if (what == SP_FILEMARKS) { 1791 if (st->fileno != -1) { 1792 st->fileno += number; 1793 if (number > 0) { 1794 st->blkno = 0; 1795 } else if (number < 0) { 1796 st->blkno = -1; 1797 } 1798 } 1799 } else if (what == SP_EOM) { 1800 /* 1801 * This loses us relative position. 1802 */ 1803 st->fileno = st->blkno = -1; 1804 } 1805 } 1806 return (error); 1807 } 1808 1809 /* 1810 * write N filemarks 1811 */ 1812 static int 1813 st_write_filemarks(struct st_softc *st, int number, int flags) 1814 { 1815 int error; 1816 struct scsi_write_filemarks cmd; 1817 1818 /* 1819 * It's hard to write a negative number of file marks. 1820 * Don't try. 1821 */ 1822 if (number < 0) 1823 return (EINVAL); 1824 switch (number) { 1825 case 0: /* really a command to sync the drive's buffers */ 1826 break; 1827 case 1: 1828 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 1829 st->flags &= ~ST_WRITTEN; 1830 else 1831 st->flags |= ST_FM_WRITTEN; 1832 st->flags &= ~ST_PER_ACTION; 1833 break; 1834 default: 1835 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 1836 } 1837 1838 memset(&cmd, 0, sizeof(cmd)); 1839 cmd.opcode = WRITE_FILEMARKS; 1840 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1841 cmd.byte2 = SR_IMMED; 1842 /* 1843 * The ATAPI Onstream DI-30 doesn't support writing filemarks, but 1844 * WRITE_FILEMARKS is still used to flush the buffer 1845 */ 1846 if ((st->quirks & ST_Q_NOFILEMARKS) == 0) 1847 _lto3b(number, cmd.number); 1848 1849 /* XXX WE NEED TO BE ABLE TO GET A RESIDIUAL XXX */ 1850 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1851 0, ST_IO_TIME * 4, NULL, flags); 1852 if (error == 0 && st->fileno != -1) { 1853 st->fileno += number; 1854 } 1855 return (error); 1856 } 1857 1858 /* 1859 * Make sure the right number of file marks is on tape if the 1860 * tape has been written. If the position argument is true, 1861 * leave the tape positioned where it was originally. 1862 * 1863 * nmarks returns the number of marks to skip (or, if position 1864 * true, which were skipped) to get back original position. 1865 */ 1866 static int 1867 st_check_eod(struct st_softc *st, boolean position, int *nmarks, int flags) 1868 { 1869 int error; 1870 1871 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 1872 default: 1873 *nmarks = 0; 1874 return (0); 1875 case ST_WRITTEN: 1876 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 1877 *nmarks = 1; 1878 break; 1879 case ST_WRITTEN | ST_2FM_AT_EOD: 1880 *nmarks = 2; 1881 } 1882 error = st_write_filemarks(st, *nmarks, flags); 1883 if (position && !error) 1884 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 1885 return (error); 1886 } 1887 1888 /* 1889 * load/unload/retension 1890 */ 1891 static int 1892 st_load(struct st_softc *st, u_int type, int flags) 1893 { 1894 int error; 1895 struct scsi_load cmd; 1896 1897 if (type != LD_LOAD) { 1898 int nmarks; 1899 1900 error = st_check_eod(st, FALSE, &nmarks, flags); 1901 if (error) { 1902 printf("%s: failed to write closing filemarks at " 1903 "unload, errno=%d\n", st->sc_dev.dv_xname, error); 1904 return (error); 1905 } 1906 } 1907 if (st->quirks & ST_Q_IGNORE_LOADS) { 1908 if (type == LD_LOAD) { 1909 /* 1910 * If we ignore loads, at least we should try a rewind. 1911 */ 1912 return st_rewind(st, 0, flags); 1913 } 1914 /* otherwise, we should do what's asked of us */ 1915 } 1916 1917 memset(&cmd, 0, sizeof(cmd)); 1918 cmd.opcode = LOAD; 1919 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1920 cmd.byte2 = SR_IMMED; 1921 cmd.how = type; 1922 1923 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1924 ST_RETRIES, ST_SPC_TIME, NULL, flags); 1925 if (error) { 1926 printf("%s: error %d in st_load (op %d)\n", 1927 st->sc_dev.dv_xname, error, type); 1928 } 1929 return (error); 1930 } 1931 1932 /* 1933 * Rewind the device 1934 */ 1935 static int 1936 st_rewind(struct st_softc *st, u_int immediate, int flags) 1937 { 1938 struct scsi_rewind cmd; 1939 int error; 1940 int nmarks; 1941 1942 error = st_check_eod(st, FALSE, &nmarks, flags); 1943 if (error) { 1944 printf("%s: failed to write closing filemarks at " 1945 "rewind, errno=%d\n", st->sc_dev.dv_xname, error); 1946 return (error); 1947 } 1948 st->flags &= ~ST_PER_ACTION; 1949 1950 /* 1951 * ATAPI tapes always need immediate to be set 1952 */ 1953 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1954 immediate = SR_IMMED; 1955 1956 memset(&cmd, 0, sizeof(cmd)); 1957 cmd.opcode = REWIND; 1958 cmd.byte2 = immediate; 1959 1960 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1961 ST_RETRIES, immediate ? ST_CTL_TIME: ST_SPC_TIME, NULL, flags); 1962 if (error) { 1963 printf("%s: error %d trying to rewind\n", 1964 st->sc_dev.dv_xname, error); 1965 /* lost position */ 1966 st->fileno = st->blkno = -1; 1967 } else { 1968 st->fileno = st->blkno = 0; 1969 } 1970 return (error); 1971 } 1972 1973 static int 1974 st_rdpos(struct st_softc *st, int hard, u_int32_t *blkptr) 1975 { 1976 int error; 1977 u_int8_t posdata[20]; 1978 struct scsi_tape_read_position cmd; 1979 1980 /* 1981 * We try and flush any buffered writes here if we were writing 1982 * and we're trying to get hardware block position. It eats 1983 * up performance substantially, but I'm wary of drive firmware. 1984 * 1985 * I think that *logical* block position is probably okay- 1986 * but hardware block position might have to wait for data 1987 * to hit media to be valid. Caveat Emptor. 1988 */ 1989 1990 if (hard && (st->flags & ST_WRITTEN)) { 1991 /* 1992 * First flush any pending writes... 1993 */ 1994 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 1995 /* 1996 * The latter case is for 'write protected' tapes 1997 * which are too stupid to recognize a zero count 1998 * for writing filemarks as a no-op. 1999 */ 2000 if (error != 0 && error != EACCES && error != EROFS) 2001 return (error); 2002 } 2003 2004 memset(&cmd, 0, sizeof(cmd)); 2005 memset(&posdata, 0, sizeof(posdata)); 2006 cmd.opcode = READ_POSITION; 2007 if (hard) 2008 cmd.byte1 = 1; 2009 2010 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 2011 (void *)&posdata, sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, 2012 XS_CTL_SILENT | XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); 2013 2014 if (error == 0) { 2015 #if 0 2016 printf("posdata:"); 2017 for (hard = 0; hard < sizeof(posdata); hard++) 2018 printf("%02x ", posdata[hard] & 0xff); 2019 printf("\n"); 2020 #endif 2021 if (posdata[0] & 0x4) /* Block Position Unknown */ 2022 error = EINVAL; 2023 else 2024 *blkptr = _4btol(&posdata[4]); 2025 } 2026 return (error); 2027 } 2028 2029 static int 2030 st_setpos(struct st_softc *st, int hard, u_int32_t *blkptr) 2031 { 2032 int error; 2033 struct scsi_tape_locate cmd; 2034 2035 /* 2036 * We used to try and flush any buffered writes here. 2037 * Now we push this onto user applications to either 2038 * flush the pending writes themselves (via a zero count 2039 * WRITE FILEMARKS command) or they can trust their tape 2040 * drive to do this correctly for them. 2041 * 2042 * There are very ugly performance limitations otherwise. 2043 */ 2044 2045 memset(&cmd, 0, sizeof(cmd)); 2046 cmd.opcode = LOCATE; 2047 if (hard) 2048 cmd.byte2 = 1 << 2; 2049 _lto4b(*blkptr, cmd.blkaddr); 2050 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 2051 ST_RETRIES, ST_SPC_TIME, NULL, 0); 2052 /* 2053 * Note file && block number position now unknown (if 2054 * these things ever start being maintained in this driver) 2055 */ 2056 st->fileno = st->blkno = -1; 2057 return (error); 2058 } 2059 2060 2061 /* 2062 * Look at the returned sense and act on the error and determine 2063 * the unix error number to pass back..., 0 (== report no error), 2064 * -1 = retry the operation, -2 continue error processing. 2065 */ 2066 static int 2067 st_interpret_sense(struct scsipi_xfer *xs) 2068 { 2069 struct scsipi_periph *periph = xs->xs_periph; 2070 struct scsi_sense_data *sense = &xs->sense.scsi_sense; 2071 struct buf *bp = xs->bp; 2072 struct st_softc *st = (void *)periph->periph_dev; 2073 int retval = EJUSTRETURN; 2074 int doprint = ((xs->xs_control & XS_CTL_SILENT) == 0); 2075 u_int8_t key; 2076 int32_t info; 2077 2078 /* 2079 * If it isn't a extended or extended/deferred error, let 2080 * the generic code handle it. 2081 */ 2082 if (SSD_RCODE(sense->response_code) != SSD_RCODE_CURRENT && 2083 SSD_RCODE(sense->response_code) != SSD_RCODE_DEFERRED) 2084 return (retval); 2085 2086 if (sense->response_code & SSD_RCODE_VALID) 2087 info = _4btol(sense->info); 2088 else 2089 info = (st->flags & ST_FIXEDBLOCKS) ? 2090 xs->datalen / st->blksize : xs->datalen; 2091 key = SSD_SENSE_KEY(sense->flags); 2092 st->mt_erreg = key; 2093 st->asc = sense->asc; 2094 st->ascq = sense->ascq; 2095 st->mt_resid = (short) info; 2096 2097 if (key == SKEY_NOT_READY && st->asc == 0x4 && st->ascq == 0x1) { 2098 /* Not Ready, Logical Unit Is in Process Of Becoming Ready */ 2099 if (!callout_pending(&periph->periph_callout)) 2100 scsipi_periph_freeze(periph, 1); 2101 callout_reset(&periph->periph_callout, 2102 hz, scsipi_periph_timed_thaw, periph); 2103 return (ERESTART); 2104 } 2105 2106 /* 2107 * If the device is not open yet, let generic handle 2108 */ 2109 if ((periph->periph_flags & PERIPH_OPEN) == 0) { 2110 return (retval); 2111 } 2112 2113 xs->resid = info; 2114 if (st->flags & ST_FIXEDBLOCKS) { 2115 if (bp) { 2116 xs->resid *= st->blksize; 2117 st->last_io_resid = xs->resid; 2118 } else { 2119 st->last_ctl_resid = xs->resid; 2120 } 2121 if (key == SKEY_VOLUME_OVERFLOW) { 2122 st->flags |= ST_EIO_PENDING; 2123 if (bp) 2124 bp->b_resid = xs->resid; 2125 } else if (sense->flags & SSD_EOM) { 2126 if ((st->flags & ST_EARLYWARN) == 0) 2127 st->flags |= ST_EIO_PENDING; 2128 st->flags |= ST_EOM_PENDING; 2129 if (bp) { 2130 #if 0 2131 bp->b_resid = xs->resid; 2132 #else 2133 /* 2134 * Grotesque as it seems, the few times 2135 * I've actually seen a non-zero resid, 2136 * the tape drive actually lied and had 2137 * written all the data! 2138 */ 2139 bp->b_resid = 0; 2140 #endif 2141 } 2142 } 2143 if (sense->flags & SSD_FILEMARK) { 2144 st->flags |= ST_AT_FILEMARK; 2145 if (bp) 2146 bp->b_resid = xs->resid; 2147 if (st->fileno != (daddr_t) -1) { 2148 st->fileno++; 2149 st->blkno = 0; 2150 st->flags |= ST_POSUPDATED; 2151 } 2152 } 2153 if (sense->flags & SSD_ILI) { 2154 st->flags |= ST_EIO_PENDING; 2155 if (bp) 2156 bp->b_resid = xs->resid; 2157 if (sense->response_code & SSD_RCODE_VALID && 2158 (xs->xs_control & XS_CTL_SILENT) == 0) 2159 printf("%s: block wrong size, %d blocks " 2160 "residual\n", st->sc_dev.dv_xname, info); 2161 2162 /* 2163 * This quirk code helps the drive read 2164 * the first tape block, regardless of 2165 * format. That is required for these 2166 * drives to return proper MODE SENSE 2167 * information. 2168 */ 2169 if ((st->quirks & ST_Q_SENSE_HELP) && 2170 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 2171 st->blksize -= 512; 2172 else if ((st->flags & ST_POSUPDATED) == 0) { 2173 if (st->blkno != (daddr_t) -1) { 2174 st->blkno += 2175 (xs->datalen / st->blksize); 2176 st->flags |= ST_POSUPDATED; 2177 } 2178 } 2179 } 2180 /* 2181 * If data wanted and no data was transferred, do it immediately 2182 */ 2183 if (xs->datalen && xs->resid >= xs->datalen) { 2184 if (st->flags & ST_EIO_PENDING) 2185 return (EIO); 2186 if (st->flags & ST_AT_FILEMARK) { 2187 if (bp) 2188 bp->b_resid = xs->resid; 2189 return (0); 2190 } 2191 } 2192 } else { /* must be variable mode */ 2193 if (bp) { 2194 st->last_io_resid = xs->resid; 2195 } else { 2196 st->last_ctl_resid = xs->resid; 2197 } 2198 if (sense->flags & SSD_EOM) { 2199 /* 2200 * The current semantics of this 2201 * driver requires EOM detection 2202 * to return EIO unless early 2203 * warning detection is enabled 2204 * for variable mode (this is always 2205 * on for fixed block mode). 2206 */ 2207 if (st->flags & ST_EARLYWARN) { 2208 st->flags |= ST_EOM_PENDING; 2209 retval = 0; 2210 } else { 2211 retval = EIO; 2212 } 2213 2214 /* 2215 * If it's an unadorned EOM detection, 2216 * suppress printing an error. 2217 */ 2218 if (key == SKEY_NO_SENSE) { 2219 doprint = 0; 2220 } 2221 } else if (sense->flags & SSD_FILEMARK) { 2222 retval = 0; 2223 if (st->fileno != (daddr_t) -1) { 2224 st->fileno++; 2225 st->blkno = 0; 2226 st->flags |= ST_POSUPDATED; 2227 } 2228 } else if (sense->flags & SSD_ILI) { 2229 if (info < 0) { 2230 /* 2231 * The tape record was bigger than the read 2232 * we issued. 2233 */ 2234 if ((xs->xs_control & XS_CTL_SILENT) == 0) { 2235 printf("%s: %d-byte tape record too big" 2236 " for %d-byte user buffer\n", 2237 st->sc_dev.dv_xname, 2238 xs->datalen - info, xs->datalen); 2239 } 2240 retval = EIO; 2241 } else { 2242 retval = 0; 2243 if (st->blkno != (daddr_t) -1) { 2244 st->blkno++; 2245 st->flags |= ST_POSUPDATED; 2246 } 2247 } 2248 } 2249 if (bp) 2250 bp->b_resid = info; 2251 } 2252 2253 #ifndef SCSIPI_DEBUG 2254 if (retval == 0 && key == SKEY_NO_SENSE) 2255 doprint = 0; 2256 #endif 2257 if (key == SKEY_BLANK_CHECK) { 2258 /* 2259 * This quirk code helps the drive read the 2260 * first tape block, regardless of format. That 2261 * is required for these drives to return proper 2262 * MODE SENSE information. 2263 */ 2264 if ((st->quirks & ST_Q_SENSE_HELP) && 2265 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 2266 /* still starting */ 2267 st->blksize -= 512; 2268 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 2269 st->flags |= ST_BLANK_READ; 2270 xs->resid = xs->datalen; 2271 if (bp) { 2272 bp->b_resid = xs->resid; 2273 /* return an EOF */ 2274 } 2275 retval = 0; 2276 /* lost position */ 2277 st->fileno = st->blkno = -1; 2278 } 2279 } 2280 2281 /* 2282 * If generic sense processing will continue, we should not 2283 * print sense info here. 2284 */ 2285 if (retval == EJUSTRETURN) 2286 doprint = 0; 2287 2288 if (doprint) { 2289 #ifdef SCSIVERBOSE 2290 scsipi_print_sense(xs, 0); 2291 #else 2292 scsipi_printaddr(periph); 2293 printf("Sense Key 0x%02x", key); 2294 if ((sense->response_code & SSD_RCODE_VALID) != 0) { 2295 switch (key) { 2296 case SKEY_NOT_READY: 2297 case SKEY_ILLEGAL_REQUEST: 2298 case SKEY_UNIT_ATTENTION: 2299 case SKEY_DATA_PROTECT: 2300 break; 2301 case SKEY_VOLUME_OVERFLOW: 2302 case SKEY_BLANK_CHECK: 2303 printf(", requested size: %d (decimal)", info); 2304 break; 2305 case SKEY_ABORTED_COMMAND: 2306 if (xs->xs_retries) 2307 printf(", retrying"); 2308 printf(", cmd 0x%x, info 0x%x", 2309 xs->cmd->opcode, info); 2310 break; 2311 default: 2312 printf(", info = %d (decimal)", info); 2313 } 2314 } 2315 if (sense->extra_len != 0) { 2316 int n; 2317 printf(", data ="); 2318 for (n = 0; n < sense->extra_len; n++) 2319 printf(" %02x", sense->csi[n]); 2320 } 2321 printf("\n"); 2322 #endif 2323 } 2324 return (retval); 2325 } 2326 2327 /* 2328 * The quirk here is that the drive returns some value to st_mode_sense 2329 * incorrectly until the tape has actually passed by the head. 2330 * 2331 * The method is to set the drive to large fixed-block state (user-specified 2332 * density and 1024-byte blocks), then read and rewind to get it to sense the 2333 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 2334 * work, as a last resort, try variable- length blocks. The result will be 2335 * the ability to do an accurate st_mode_sense. 2336 * 2337 * We know we can do a rewind because we just did a load, which implies rewind. 2338 * Rewind seems preferable to space backward if we have a virgin tape. 2339 * 2340 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 2341 * error processing, both part of st_interpret_sense. 2342 */ 2343 static int 2344 st_touch_tape(struct st_softc *st) 2345 { 2346 char *bf; 2347 int readsize; 2348 int error; 2349 2350 bf = malloc(1024, M_TEMP, M_NOWAIT); 2351 if (bf == NULL) 2352 return (ENOMEM); 2353 2354 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 2355 goto bad; 2356 2357 /* 2358 * If the block size is already known from the 2359 * sense data, use it. Else start probing at 1024. 2360 */ 2361 if (st->media_blksize > 0) 2362 st->blksize = st->media_blksize; 2363 else 2364 st->blksize = 1024; 2365 2366 do { 2367 switch (st->blksize) { 2368 case 512: 2369 case 1024: 2370 readsize = st->blksize; 2371 st->flags |= ST_FIXEDBLOCKS; 2372 break; 2373 default: 2374 readsize = 1; 2375 st->flags &= ~ST_FIXEDBLOCKS; 2376 } 2377 if ((error = st->ops(st, ST_OPS_MODESELECT, XS_CTL_SILENT)) 2378 != 0) { 2379 /* 2380 * The device did not agree with the proposed 2381 * block size. If we exhausted our options, 2382 * return failure, else try another. 2383 */ 2384 if (readsize == 1) 2385 goto bad; 2386 st->blksize -= 512; 2387 continue; 2388 } 2389 st_read(st, bf, readsize, XS_CTL_SILENT); /* XXX */ 2390 if ((error = st_rewind(st, 0, 0)) != 0) { 2391 bad: free(bf, M_TEMP); 2392 return (error); 2393 } 2394 } while (readsize != 1 && readsize > st->blksize); 2395 2396 free(bf, M_TEMP); 2397 return (0); 2398 } 2399 2400 static int 2401 stdump(dev_t dev, daddr_t blkno, caddr_t va, size_t size) 2402 { 2403 2404 /* Not implemented. */ 2405 return (ENXIO); 2406 } 2407