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sys/dev/scsipi/st.c
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1 /* $NetBSD: st.c,v 1.163.4.1 2004/09/11 12:58:36 he Exp $ */ 2 /*- 3 * Copyright (c) 1998 The NetBSD Foundation, Inc. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to The NetBSD Foundation 7 * by Charles M. Hannum. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the NetBSD 20 * Foundation, Inc. and its contributors. 21 * 4. Neither the name of The NetBSD Foundation nor the names of its 22 * contributors may be used to endorse or promote products derived 23 * from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 26 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 /* 39 * Originally written by Julian Elischer (julian@tfs.com) 40 * for TRW Financial Systems for use under the MACH(2.5) operating system. 41 * 42 * TRW Financial Systems, in accordance with their agreement with Carnegie 43 * Mellon University, makes this software available to CMU to distribute 44 * or use in any manner that they see fit as long as this message is kept with 45 * the software. For this reason TFS also grants any other persons or 46 * organisations permission to use or modify this software. 47 * 48 * TFS supplies this software to be publicly redistributed 49 * on the understanding that TFS is not responsible for the correct 50 * functioning of this software in any circumstances. 51 * 52 * Ported to run under 386BSD by Julian Elischer (julian@tfs.com) Sept 1992 53 * major changes by Julian Elischer (julian@jules.dialix.oz.au) May 1993 54 * 55 * A lot of rewhacking done by mjacob (mjacob@nas.nasa.gov). 56 */ 57 58 #include <sys/cdefs.h> 59 __KERNEL_RCSID(0, "$NetBSD: st.c,v 1.163.4.1 2004/09/11 12:58:36 he Exp $"); 60 61 #include "opt_scsi.h" 62 63 #include <sys/param.h> 64 #include <sys/systm.h> 65 #include <sys/fcntl.h> 66 #include <sys/errno.h> 67 #include <sys/ioctl.h> 68 #include <sys/malloc.h> 69 #include <sys/buf.h> 70 #include <sys/proc.h> 71 #include <sys/user.h> 72 #include <sys/mtio.h> 73 #include <sys/device.h> 74 #include <sys/conf.h> 75 #include <sys/kernel.h> 76 #include <sys/vnode.h> 77 78 #include <dev/scsipi/scsi_all.h> 79 #include <dev/scsipi/scsi_tape.h> 80 #include <dev/scsipi/stvar.h> 81 #include <dev/scsipi/scsipi_base.h> 82 83 /* Defines for device specific stuff */ 84 #define DEF_FIXED_BSIZE 512 85 86 #define STMODE(z) ( minor(z) & 0x03) 87 #define STDSTY(z) ((minor(z) >> 2) & 0x03) 88 #define STUNIT(z) ((minor(z) >> 4) ) 89 #define STNMINOR 16 90 91 #define NORMAL_MODE 0 92 #define NOREW_MODE 1 93 #define EJECT_MODE 2 94 #define CTRL_MODE 3 95 96 #define FALSE 0 97 #define TRUE 1 98 99 #ifndef ST_MOUNT_DELAY 100 #define ST_MOUNT_DELAY 0 101 #endif 102 103 dev_type_open(stopen); 104 dev_type_close(stclose); 105 dev_type_read(stread); 106 dev_type_write(stwrite); 107 dev_type_ioctl(stioctl); 108 dev_type_strategy(ststrategy); 109 dev_type_dump(stdump); 110 111 const struct bdevsw st_bdevsw = { 112 stopen, stclose, ststrategy, stioctl, stdump, nosize, D_TAPE 113 }; 114 115 const struct cdevsw st_cdevsw = { 116 stopen, stclose, stread, stwrite, stioctl, 117 nostop, notty, nopoll, nommap, nokqfilter, D_TAPE 118 }; 119 120 /* 121 * Define various devices that we know mis-behave in some way, 122 * and note how they are bad, so we can correct for them 123 */ 124 125 const struct st_quirk_inquiry_pattern st_quirk_patterns[] = { 126 {{T_SEQUENTIAL, T_REMOV, 127 " ", " ", " "}, {0, 0, { 128 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 129 {ST_Q_FORCE_BLKSIZE, 512, QIC_24}, /* minor 4-7 */ 130 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_1600}, /* minor 8-11 */ 131 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_6250} /* minor 12-15 */ 132 }}}, 133 {{T_SEQUENTIAL, T_REMOV, 134 "TANDBERG", " TDC 3600 ", ""}, {0, 12, { 135 {0, 0, 0}, /* minor 0-3 */ 136 {ST_Q_FORCE_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 137 {0, 0, QIC_150}, /* minor 8-11 */ 138 {0, 0, QIC_120} /* minor 12-15 */ 139 }}}, 140 {{T_SEQUENTIAL, T_REMOV, 141 "TANDBERG", " TDC 3800 ", ""}, {0, 0, { 142 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 143 {0, 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", " SLR5 4/8GB ", ""}, {0, 0, { 149 {ST_Q_FORCE_BLKSIZE, 1024, 0}, /* minor 0-3 */ 150 {0, 0, 0}, /* minor 4-7 */ 151 {0, 0, 0}, /* minor 8-11 */ 152 {0, 0, 0} /* minor 12-15 */ 153 }}}, 154 /* 155 * lacking a manual for the 4200, it's not clear what the 156 * specific density codes should be- the device is a 2.5GB 157 * capable QIC drive, those density codes aren't readily 158 * availabel. The 'default' will just have to do. 159 */ 160 {{T_SEQUENTIAL, T_REMOV, 161 "TANDBERG", " TDC 4200 ", ""}, {0, 0, { 162 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 163 {0, 0, QIC_525}, /* minor 4-7 */ 164 {0, 0, QIC_150}, /* minor 8-11 */ 165 {0, 0, QIC_120} /* minor 12-15 */ 166 }}}, 167 /* 168 * At least -005 and -007 need this. I'll assume they all do unless I 169 * hear otherwise. - mycroft, 31MAR1994 170 */ 171 {{T_SEQUENTIAL, T_REMOV, 172 "ARCHIVE ", "VIPER 2525 25462", ""}, {0, 0, { 173 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 174 {ST_Q_SENSE_HELP, 0, QIC_525}, /* minor 4-7 */ 175 {0, 0, QIC_150}, /* minor 8-11 */ 176 {0, 0, QIC_120} /* minor 12-15 */ 177 }}}, 178 /* 179 * One user reports that this works for his tape drive. It probably 180 * needs more work. - mycroft, 09APR1994 181 */ 182 {{T_SEQUENTIAL, T_REMOV, 183 "SANKYO ", "CP525 ", ""}, {0, 0, { 184 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 185 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 186 {0, 0, QIC_150}, /* minor 8-11 */ 187 {0, 0, QIC_120} /* minor 12-15 */ 188 }}}, 189 {{T_SEQUENTIAL, T_REMOV, 190 "ANRITSU ", "DMT780 ", ""}, {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 "ARCHIVE ", "VIPER 150 21247", ""}, {ST_Q_ERASE_NOIMM, 12, { 198 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 199 {0, 0, QIC_150}, /* minor 4-7 */ 200 {0, 0, QIC_120}, /* minor 8-11 */ 201 {0, 0, QIC_24} /* minor 12-15 */ 202 }}}, 203 {{T_SEQUENTIAL, T_REMOV, 204 "ARCHIVE ", "VIPER 150 21531", ""}, {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 "WANGTEK ", "5099ES SCSI", ""}, {0, 0, { 212 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 213 {0, 0, QIC_11}, /* minor 4-7 */ 214 {0, 0, QIC_24}, /* minor 8-11 */ 215 {0, 0, QIC_24} /* minor 12-15 */ 216 }}}, 217 {{T_SEQUENTIAL, T_REMOV, 218 "WANGTEK ", "5150ES SCSI", ""}, {0, 0, { 219 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 220 {0, 0, QIC_24}, /* minor 4-7 */ 221 {0, 0, QIC_120}, /* minor 8-11 */ 222 {0, 0, QIC_150} /* minor 12-15 */ 223 }}}, 224 {{T_SEQUENTIAL, T_REMOV, 225 "WANGTEK ", "5525ES SCSI REV7", ""}, {0, 0, { 226 {0, 0, 0}, /* minor 0-3 */ 227 {ST_Q_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 228 {0, 0, QIC_150}, /* minor 8-11 */ 229 {0, 0, QIC_120} /* minor 12-15 */ 230 }}}, 231 {{T_SEQUENTIAL, T_REMOV, 232 "WangDAT ", "Model 1300 ", ""}, {0, 0, { 233 {0, 0, 0}, /* minor 0-3 */ 234 {ST_Q_FORCE_BLKSIZE, 512, DDS}, /* minor 4-7 */ 235 {ST_Q_FORCE_BLKSIZE, 1024, DDS}, /* minor 8-11 */ 236 {ST_Q_FORCE_BLKSIZE, 0, DDS} /* minor 12-15 */ 237 }}}, 238 {{T_SEQUENTIAL, T_REMOV, 239 "EXABYTE ", "EXB-8200 ", "263H"}, {0, 5, { 240 {0, 0, 0}, /* minor 0-3 */ 241 {0, 0, 0}, /* minor 4-7 */ 242 {0, 0, 0}, /* minor 8-11 */ 243 {0, 0, 0} /* minor 12-15 */ 244 }}}, 245 {{T_SEQUENTIAL, T_REMOV, 246 "STK", "9490", ""}, 247 {ST_Q_FORCE_BLKSIZE, 0, { 248 {0, 0, 0}, /* minor 0-3 */ 249 {0, 0, 0}, /* minor 4-7 */ 250 {0, 0, 0}, /* minor 8-11 */ 251 {0, 0, 0} /* minor 12-15 */ 252 }}}, 253 {{T_SEQUENTIAL, T_REMOV, 254 "STK", "SD-3", ""}, 255 {ST_Q_FORCE_BLKSIZE, 0, { 256 {0, 0, 0}, /* minor 0-3 */ 257 {0, 0, 0}, /* minor 4-7 */ 258 {0, 0, 0}, /* minor 8-11 */ 259 {0, 0, 0} /* minor 12-15 */ 260 }}}, 261 {{T_SEQUENTIAL, T_REMOV, 262 "IBM", "03590", ""}, {ST_Q_IGNORE_LOADS, 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 "HP ", "T4000s ", ""}, {ST_Q_UNIMODAL, 0, { 270 {0, 0, QIC_3095}, /* minor 0-3 */ 271 {0, 0, QIC_3095}, /* minor 4-7 */ 272 {0, 0, QIC_3095}, /* minor 8-11 */ 273 {0, 0, QIC_3095}, /* minor 12-15 */ 274 }}}, 275 #if 0 276 {{T_SEQUENTIAL, T_REMOV, 277 "EXABYTE ", "EXB-8200 ", ""}, {0, 12, { 278 {0, 0, 0}, /* minor 0-3 */ 279 {0, 0, 0}, /* minor 4-7 */ 280 {0, 0, 0}, /* minor 8-11 */ 281 {0, 0, 0} /* minor 12-15 */ 282 }}}, 283 #endif 284 {{T_SEQUENTIAL, T_REMOV, 285 "TEAC ", "MT-2ST/N50 ", ""}, {ST_Q_IGNORE_LOADS, 0, { 286 {0, 0, 0}, /* minor 0-3 */ 287 {0, 0, 0}, /* minor 4-7 */ 288 {0, 0, 0}, /* minor 8-11 */ 289 {0, 0, 0} /* minor 12-15 */ 290 }}}, 291 {{T_SEQUENTIAL, T_REMOV, 292 "OnStream", "ADR50 Drive", ""}, {ST_Q_UNIMODAL, 0, { 293 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 294 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 4-7 */ 295 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 8-11 */ 296 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 12-15 */ 297 }}}, 298 {{T_SEQUENTIAL, T_REMOV, 299 "OnStream DI-30", "", "1.0"}, {ST_Q_NOFILEMARKS, 0, { 300 {0, 0, 0}, /* minor 0-3 */ 301 {0, 0, 0}, /* minor 4-7 */ 302 {0, 0, 0}, /* minor 8-11 */ 303 {0, 0, 0} /* minor 12-15 */ 304 }}}, 305 {{T_SEQUENTIAL, T_REMOV, 306 "NCR H621", "0-STD-03-46F880 ", ""}, {ST_Q_NOPREVENT, 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 }; 313 314 #define NOEJECT 0 315 #define EJECT 1 316 317 void st_identify_drive __P((struct st_softc *, 318 struct scsipi_inquiry_pattern *)); 319 void st_loadquirks __P((struct st_softc *)); 320 int st_mount_tape __P((dev_t, int)); 321 void st_unmount __P((struct st_softc *, boolean)); 322 int st_decide_mode __P((struct st_softc *, boolean)); 323 void ststart __P((struct scsipi_periph *)); 324 void strestart __P((void *)); 325 void stdone __P((struct scsipi_xfer *)); 326 int st_read __P((struct st_softc *, char *, int, int)); 327 int st_space __P((struct st_softc *, int, u_int, int)); 328 int st_write_filemarks __P((struct st_softc *, int, int)); 329 int st_check_eod __P((struct st_softc *, boolean, int *, int)); 330 int st_load __P((struct st_softc *, u_int, int)); 331 int st_rewind __P((struct st_softc *, u_int, int)); 332 int st_interpret_sense __P((struct scsipi_xfer *)); 333 int st_touch_tape __P((struct st_softc *)); 334 int st_erase __P((struct st_softc *, int full, int flags)); 335 int st_rdpos __P((struct st_softc *, int, u_int32_t *)); 336 int st_setpos __P((struct st_softc *, int, u_int32_t *)); 337 338 const struct scsipi_periphsw st_switch = { 339 st_interpret_sense, 340 ststart, 341 NULL, 342 stdone 343 }; 344 345 #if defined(ST_ENABLE_EARLYWARN) 346 #define ST_INIT_FLAGS ST_EARLYWARN 347 #else 348 #define ST_INIT_FLAGS 0 349 #endif 350 351 /* 352 * The routine called by the low level scsi routine when it discovers 353 * A device suitable for this driver 354 */ 355 void 356 stattach(parent, st, aux) 357 struct device *parent; 358 struct st_softc *st; 359 void *aux; 360 { 361 struct scsipibus_attach_args *sa = aux; 362 struct scsipi_periph *periph = sa->sa_periph; 363 364 SC_DEBUG(periph, SCSIPI_DB2, ("stattach: ")); 365 366 /* 367 * Store information needed to contact our base driver 368 */ 369 st->sc_periph = periph; 370 periph->periph_dev = &st->sc_dev; 371 periph->periph_switch = &st_switch; 372 373 /* 374 * Set initial flags 375 */ 376 377 st->flags = ST_INIT_FLAGS; 378 379 /* 380 * Set up the buf queue for this device 381 */ 382 bufq_alloc(&st->buf_queue, BUFQ_FCFS); 383 384 callout_init(&st->sc_callout); 385 386 /* 387 * Check if the drive is a known criminal and take 388 * Any steps needed to bring it into line 389 */ 390 st_identify_drive(st, &sa->sa_inqbuf); 391 /* 392 * Use the subdriver to request information regarding the drive. 393 */ 394 printf("\n"); 395 printf("%s: %s", st->sc_dev.dv_xname, st->quirkdata ? "rogue, " : ""); 396 if (scsipi_test_unit_ready(periph, 397 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE) || 398 st->ops(st, ST_OPS_MODESENSE, 399 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE)) 400 printf("drive empty\n"); 401 else { 402 printf("density code %d, ", st->media_density); 403 if (st->media_blksize > 0) 404 printf("%d-byte", st->media_blksize); 405 else 406 printf("variable"); 407 printf(" blocks, write-%s\n", 408 (st->flags & ST_READONLY) ? "protected" : "enabled"); 409 } 410 411 #if NRND > 0 412 rnd_attach_source(&st->rnd_source, st->sc_dev.dv_xname, 413 RND_TYPE_TAPE, 0); 414 #endif 415 } 416 417 int 418 stactivate(self, act) 419 struct device *self; 420 enum devact act; 421 { 422 int rv = 0; 423 424 switch (act) { 425 case DVACT_ACTIVATE: 426 rv = EOPNOTSUPP; 427 break; 428 429 case DVACT_DEACTIVATE: 430 /* 431 * Nothing to do; we key off the device's DVF_ACTIVE. 432 */ 433 break; 434 } 435 return (rv); 436 } 437 438 int 439 stdetach(self, flags) 440 struct device *self; 441 int flags; 442 { 443 struct st_softc *st = (struct st_softc *)self; 444 struct buf *bp; 445 int s, bmaj, cmaj, mn; 446 447 /* locate the major number */ 448 bmaj = bdevsw_lookup_major(&st_bdevsw); 449 cmaj = cdevsw_lookup_major(&st_cdevsw); 450 451 /* kill any pending restart */ 452 callout_stop(&st->sc_callout); 453 454 s = splbio(); 455 456 /* Kill off any queued buffers. */ 457 while ((bp = BUFQ_GET(&st->buf_queue)) != NULL) { 458 bp->b_error = EIO; 459 bp->b_flags |= B_ERROR; 460 bp->b_resid = bp->b_bcount; 461 biodone(bp); 462 } 463 464 bufq_free(&st->buf_queue); 465 466 /* Kill off any pending commands. */ 467 scsipi_kill_pending(st->sc_periph); 468 469 splx(s); 470 471 /* Nuke the vnodes for any open instances */ 472 mn = STUNIT(self->dv_unit); 473 vdevgone(bmaj, mn, mn+STNMINOR-1, VBLK); 474 vdevgone(cmaj, mn, mn+STNMINOR-1, VCHR); 475 476 477 #if NRND > 0 478 /* Unhook the entropy source. */ 479 rnd_detach_source(&st->rnd_source); 480 #endif 481 482 return (0); 483 } 484 485 /* 486 * Use the inquiry routine in 'scsi_base' to get drive info so we can 487 * Further tailor our behaviour. 488 */ 489 void 490 st_identify_drive(st, inqbuf) 491 struct st_softc *st; 492 struct scsipi_inquiry_pattern *inqbuf; 493 { 494 struct st_quirk_inquiry_pattern *finger; 495 int priority; 496 497 finger = (struct st_quirk_inquiry_pattern *)scsipi_inqmatch(inqbuf, 498 (caddr_t)st_quirk_patterns, 499 sizeof(st_quirk_patterns) / sizeof(st_quirk_patterns[0]), 500 sizeof(st_quirk_patterns[0]), &priority); 501 if (priority != 0) { 502 st->quirkdata = &finger->quirkdata; 503 st->drive_quirks = finger->quirkdata.quirks; 504 st->quirks = finger->quirkdata.quirks; /* start value */ 505 st->page_0_size = finger->quirkdata.page_0_size; 506 st_loadquirks(st); 507 } 508 } 509 510 /* 511 * initialise the subdevices to the default (QUIRK) state. 512 * this will remove any setting made by the system operator or previous 513 * operations. 514 */ 515 void 516 st_loadquirks(st) 517 struct st_softc *st; 518 { 519 int i; 520 struct modes *mode; 521 struct modes *mode2; 522 523 mode = st->quirkdata->modes; 524 mode2 = st->modes; 525 for (i = 0; i < 4; i++) { 526 memset(mode2, 0, sizeof(struct modes)); 527 st->modeflags[i] &= ~(BLKSIZE_SET_BY_QUIRK | 528 DENSITY_SET_BY_QUIRK | BLKSIZE_SET_BY_USER | 529 DENSITY_SET_BY_USER); 530 if ((mode->quirks | st->drive_quirks) & ST_Q_FORCE_BLKSIZE) { 531 mode2->blksize = mode->blksize; 532 st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; 533 } 534 if (mode->density) { 535 mode2->density = mode->density; 536 st->modeflags[i] |= DENSITY_SET_BY_QUIRK; 537 } 538 mode2->quirks |= mode->quirks; 539 mode++; 540 mode2++; 541 } 542 } 543 544 /* 545 * open the device. 546 */ 547 int 548 stopen(dev, flags, mode, p) 549 dev_t dev; 550 int flags; 551 int mode; 552 struct proc *p; 553 { 554 u_int stmode, dsty; 555 int error, sflags, unit, tries, ntries; 556 struct st_softc *st; 557 struct scsipi_periph *periph; 558 struct scsipi_adapter *adapt; 559 560 unit = STUNIT(dev); 561 if (unit >= st_cd.cd_ndevs) 562 return (ENXIO); 563 st = st_cd.cd_devs[unit]; 564 if (st == NULL) 565 return (ENXIO); 566 567 stmode = STMODE(dev); 568 dsty = STDSTY(dev); 569 570 periph = st->sc_periph; 571 adapt = periph->periph_channel->chan_adapter; 572 573 SC_DEBUG(periph, SCSIPI_DB1, ("open: dev=0x%x (unit %d (of %d))\n", dev, 574 unit, st_cd.cd_ndevs)); 575 576 577 /* 578 * Only allow one at a time 579 */ 580 if (periph->periph_flags & PERIPH_OPEN) { 581 printf("%s: already open\n", st->sc_dev.dv_xname); 582 return (EBUSY); 583 } 584 585 if ((error = scsipi_adapter_addref(adapt)) != 0) 586 return (error); 587 588 /* 589 * clear any latched errors. 590 */ 591 st->mt_resid = 0; 592 st->mt_erreg = 0; 593 st->asc = 0; 594 st->ascq = 0; 595 596 /* 597 * Catch any unit attention errors. Be silent about this 598 * unless we're already mounted. We ignore media change 599 * if we're in control mode or not mounted yet. 600 */ 601 if ((st->flags & ST_MOUNTED) == 0 || stmode == CTRL_MODE) { 602 #ifdef SCSIDEBUG 603 sflags = XS_CTL_IGNORE_MEDIA_CHANGE; 604 #else 605 sflags = XS_CTL_SILENT|XS_CTL_IGNORE_MEDIA_CHANGE; 606 #endif 607 } else 608 sflags = 0; 609 610 /* 611 * If we're already mounted or we aren't configured for 612 * a mount delay, only try a test unit ready once. Otherwise, 613 * try up to ST_MOUNT_DELAY times with a rest interval of 614 * one second between each try. 615 */ 616 617 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0) { 618 ntries = 1; 619 } else { 620 ntries = ST_MOUNT_DELAY; 621 } 622 623 for (error = tries = 0; tries < ntries; tries++) { 624 int slpintr, oflags; 625 626 /* 627 * If we had no error, or we're opening the control mode 628 * device, we jump out right away. 629 */ 630 631 error = scsipi_test_unit_ready(periph, sflags); 632 if (error == 0 || stmode == CTRL_MODE) { 633 break; 634 } 635 636 /* 637 * We had an error. 638 * 639 * If we're already mounted or we aren't configured for 640 * a mount delay, or the error isn't a NOT READY error, 641 * skip to the error exit now. 642 */ 643 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0 || 644 (st->mt_key != SKEY_NOT_READY)) { 645 goto bad; 646 } 647 648 /* 649 * clear any latched errors. 650 */ 651 st->mt_resid = 0; 652 st->mt_erreg = 0; 653 st->asc = 0; 654 st->ascq = 0; 655 656 /* 657 * Fake that we have the device open so 658 * we block other apps from getting in. 659 */ 660 661 oflags = periph->periph_flags; 662 periph->periph_flags |= PERIPH_OPEN; 663 664 slpintr = tsleep(&lbolt, PUSER|PCATCH, "stload", 0); 665 666 periph->periph_flags = oflags; /* restore flags */ 667 if (slpintr) { 668 goto bad; 669 } 670 } 671 672 673 /* 674 * If the mode is 3 (e.g. minor = 3,7,11,15) then the device has 675 * been opened to set defaults and perform other, usually non-I/O 676 * related, operations. In this case, do a quick check to see 677 * whether the unit actually had a tape loaded (this will be known 678 * as to whether or not we got a NOT READY for the above 679 * unit attention). If a tape is there, go do a mount sequence. 680 */ 681 if (stmode == CTRL_MODE && st->mt_key == SKEY_NOT_READY) { 682 periph->periph_flags |= PERIPH_OPEN; 683 return (0); 684 } 685 686 /* 687 * If we get this far and had an error set, that means we failed 688 * to pass the 'test unit ready' test for the non-controlmode device, 689 * so we bounce the open. 690 */ 691 692 if (error) 693 return (error); 694 695 /* 696 * Else, we're now committed to saying we're open. 697 */ 698 699 periph->periph_flags |= PERIPH_OPEN; /* unit attn are now errors */ 700 701 /* 702 * If it's a different mode, or if the media has been 703 * invalidated, unmount the tape from the previous 704 * session but continue with open processing 705 */ 706 if (st->last_dsty != dsty || 707 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 708 st_unmount(st, NOEJECT); 709 710 /* 711 * If we are not mounted, then we should start a new 712 * mount session. 713 */ 714 if (!(st->flags & ST_MOUNTED)) { 715 if ((error = st_mount_tape(dev, flags)) != 0) 716 goto bad; 717 st->last_dsty = dsty; 718 } 719 if (!(st->quirks & ST_Q_NOPREVENT)) { 720 scsipi_prevent(periph, PR_PREVENT, 721 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 722 } 723 724 SC_DEBUG(periph, SCSIPI_DB2, ("open complete\n")); 725 return (0); 726 727 bad: 728 st_unmount(st, NOEJECT); 729 scsipi_adapter_delref(adapt); 730 periph->periph_flags &= ~PERIPH_OPEN; 731 return (error); 732 } 733 734 /* 735 * close the device.. only called if we are the LAST 736 * occurence of an open device 737 */ 738 int 739 stclose(dev, flags, mode, p) 740 dev_t dev; 741 int flags; 742 int mode; 743 struct proc *p; 744 { 745 int stxx, error = 0; 746 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 747 struct scsipi_periph *periph = st->sc_periph; 748 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 749 750 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("closing\n")); 751 752 /* 753 * Make sure that a tape opened in write-only mode will have 754 * file marks written on it when closed, even if not written to. 755 * 756 * This is for SUN compatibility. Actually, the Sun way of 757 * things is to: 758 * 759 * only write filemarks if there are fmks to be written and 760 * - open for write (possibly read/write) 761 * - the last operation was a write 762 * or: 763 * - opened for wronly 764 * - no data was written (including filemarks) 765 */ 766 767 stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); 768 if (((flags & FWRITE) && stxx == ST_WRITTEN) || 769 ((flags & O_ACCMODE) == FWRITE && stxx == 0)) { 770 int nm; 771 error = st_check_eod(st, FALSE, &nm, 0); 772 } 773 774 /* 775 * Allow robots to eject tape if needed. 776 */ 777 scsipi_prevent(periph, PR_ALLOW, 778 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 779 780 switch (STMODE(dev)) { 781 case NORMAL_MODE: 782 st_unmount(st, NOEJECT); 783 break; 784 case NOREW_MODE: 785 case CTRL_MODE: 786 /* 787 * Leave mounted unless media seems to have been removed. 788 * 789 * Otherwise, if we're to terminate a tape with more than one 790 * filemark [ and because we're not rewinding here ], backspace 791 * one filemark so that later appends will see an unbroken 792 * sequence of: 793 * 794 * file - FMK - file - FMK ... file - FMK FMK (EOM) 795 */ 796 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 797 st_unmount(st, NOEJECT); 798 } else if (error == 0) { 799 /* 800 * ST_WRITTEN was preserved from above. 801 * 802 * All we need to know here is: 803 * 804 * Were we writing this tape and was the last 805 * operation a write? 806 * 807 * Are there supposed to be 2FM at EOD? 808 * 809 * If both statements are true, then we backspace 810 * one filemark. 811 */ 812 stxx |= (st->flags & ST_2FM_AT_EOD); 813 if ((flags & FWRITE) != 0 && 814 (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { 815 error = st_space(st, -1, SP_FILEMARKS, 0); 816 } 817 } 818 break; 819 case EJECT_MODE: 820 st_unmount(st, EJECT); 821 break; 822 } 823 824 scsipi_wait_drain(periph); 825 826 scsipi_adapter_delref(adapt); 827 periph->periph_flags &= ~PERIPH_OPEN; 828 829 return (error); 830 } 831 832 /* 833 * Start a new mount session. 834 * Copy in all the default parameters from the selected device mode. 835 * and try guess any that seem to be defaulted. 836 */ 837 int 838 st_mount_tape(dev, flags) 839 dev_t dev; 840 int flags; 841 { 842 int unit; 843 u_int dsty; 844 struct st_softc *st; 845 struct scsipi_periph *periph; 846 int error = 0; 847 848 unit = STUNIT(dev); 849 dsty = STDSTY(dev); 850 st = st_cd.cd_devs[unit]; 851 periph = st->sc_periph; 852 853 if (st->flags & ST_MOUNTED) 854 return (0); 855 856 SC_DEBUG(periph, SCSIPI_DB1, ("mounting\n ")); 857 st->flags |= ST_NEW_MOUNT; 858 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 859 /* 860 * If the media is new, then make sure we give it a chance to 861 * to do a 'load' instruction. (We assume it is new.) 862 */ 863 if ((error = st_load(st, LD_LOAD, XS_CTL_SILENT)) != 0) 864 return (error); 865 /* 866 * Throw another dummy instruction to catch 867 * 'Unit attention' errors. Many drives give 868 * these after doing a Load instruction (with 869 * the MEDIUM MAY HAVE CHANGED asc/ascq). 870 */ 871 scsipi_test_unit_ready(periph, XS_CTL_SILENT); /* XXX */ 872 873 /* 874 * Some devices can't tell you much until they have been 875 * asked to look at the media. This quirk does this. 876 */ 877 if (st->quirks & ST_Q_SENSE_HELP) 878 if ((error = st_touch_tape(st)) != 0) 879 return (error); 880 /* 881 * Load the physical device parameters 882 * loads: blkmin, blkmax 883 */ 884 if ((error = st->ops(st, ST_OPS_RBL, 0)) != 0) 885 return (error); 886 /* 887 * Load the media dependent parameters 888 * includes: media_blksize,media_density,numblks 889 * As we have a tape in, it should be reflected here. 890 * If not you may need the "quirk" above. 891 */ 892 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 893 return (error); 894 /* 895 * If we have gained a permanent density from somewhere, 896 * then use it in preference to the one supplied by 897 * default by the driver. 898 */ 899 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 900 st->density = st->modes[dsty].density; 901 else 902 st->density = st->media_density; 903 /* 904 * If we have gained a permanent blocksize 905 * then use it in preference to the one supplied by 906 * default by the driver. 907 */ 908 st->flags &= ~ST_FIXEDBLOCKS; 909 if (st->modeflags[dsty] & 910 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 911 st->blksize = st->modes[dsty].blksize; 912 if (st->blksize) 913 st->flags |= ST_FIXEDBLOCKS; 914 } else { 915 if ((error = st_decide_mode(st, FALSE)) != 0) 916 return (error); 917 } 918 if ((error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 919 /* ATAPI will return ENODEV for this, and this may be OK */ 920 if (error != ENODEV) { 921 printf("%s: cannot set selected mode\n", 922 st->sc_dev.dv_xname); 923 return (error); 924 } 925 } 926 st->flags &= ~ST_NEW_MOUNT; 927 st->flags |= ST_MOUNTED; 928 periph->periph_flags |= PERIPH_MEDIA_LOADED; /* move earlier? */ 929 st->blkno = st->fileno = (daddr_t) 0; 930 return (0); 931 } 932 933 /* 934 * End the present mount session. 935 * Rewind, and optionally eject the tape. 936 * Reset various flags to indicate that all new 937 * operations require another mount operation 938 */ 939 void 940 st_unmount(st, eject) 941 struct st_softc *st; 942 boolean eject; 943 { 944 struct scsipi_periph *periph = st->sc_periph; 945 int nmarks; 946 947 if ((st->flags & ST_MOUNTED) == 0) 948 return; 949 SC_DEBUG(periph, SCSIPI_DB1, ("unmounting\n")); 950 st_check_eod(st, FALSE, &nmarks, XS_CTL_IGNORE_NOT_READY); 951 st_rewind(st, 0, XS_CTL_IGNORE_NOT_READY); 952 953 /* 954 * Section 9.3.3 of the SCSI specs states that a device shall return 955 * the density value specified in the last succesfull MODE SELECT 956 * after an unload operation, in case it is not able to 957 * automatically determine the density of the new medium. 958 * 959 * So we instruct the device to use the default density, which will 960 * prevent the use of stale density values (in particular, 961 * in st_touch_tape(). 962 */ 963 st->density = 0; 964 if (st->ops(st, ST_OPS_MODESELECT, 0) != 0) { 965 printf("%s: WARNING: cannot revert to default density\n", 966 st->sc_dev.dv_xname); 967 } 968 969 if (eject) { 970 if (!(st->quirks & ST_Q_NOPREVENT)) { 971 scsipi_prevent(periph, PR_ALLOW, 972 XS_CTL_IGNORE_ILLEGAL_REQUEST | 973 XS_CTL_IGNORE_NOT_READY); 974 } 975 st_load(st, LD_UNLOAD, XS_CTL_IGNORE_NOT_READY); 976 st->blkno = st->fileno = (daddr_t) -1; 977 } else { 978 st->blkno = st->fileno = (daddr_t) 0; 979 } 980 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 981 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 982 } 983 984 /* 985 * Given all we know about the device, media, mode, 'quirks' and 986 * initial operation, make a decision as to how we should be set 987 * to run (regarding blocking and EOD marks) 988 */ 989 int 990 st_decide_mode(st, first_read) 991 struct st_softc *st; 992 boolean first_read; 993 { 994 995 SC_DEBUG(st->sc_periph, SCSIPI_DB2, ("starting block mode decision\n")); 996 997 /* 998 * If the drive can only handle fixed-length blocks and only at 999 * one size, perhaps we should just do that. 1000 */ 1001 if (st->blkmin && (st->blkmin == st->blkmax)) { 1002 st->flags |= ST_FIXEDBLOCKS; 1003 st->blksize = st->blkmin; 1004 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1005 ("blkmin == blkmax of %d\n", st->blkmin)); 1006 goto done; 1007 } 1008 /* 1009 * If the tape density mandates (or even suggests) use of fixed 1010 * or variable-length blocks, comply. 1011 */ 1012 switch (st->density) { 1013 case HALFINCH_800: 1014 case HALFINCH_1600: 1015 case HALFINCH_6250: 1016 case DDS: 1017 st->flags &= ~ST_FIXEDBLOCKS; 1018 st->blksize = 0; 1019 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1020 ("density specified variable\n")); 1021 goto done; 1022 case QIC_11: 1023 case QIC_24: 1024 case QIC_120: 1025 case QIC_150: 1026 case QIC_525: 1027 case QIC_1320: 1028 case QIC_3095: 1029 case QIC_3220: 1030 st->flags |= ST_FIXEDBLOCKS; 1031 if (st->media_blksize > 0) 1032 st->blksize = st->media_blksize; 1033 else 1034 st->blksize = DEF_FIXED_BSIZE; 1035 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1036 ("density specified fixed\n")); 1037 goto done; 1038 } 1039 /* 1040 * If we're about to read the tape, perhaps we should choose 1041 * fixed or variable-length blocks and block size according to 1042 * what the drive found on the tape. 1043 */ 1044 if (first_read && 1045 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 1046 (st->media_blksize == DEF_FIXED_BSIZE) || 1047 (st->media_blksize == 1024))) { 1048 if (st->media_blksize > 0) 1049 st->flags |= ST_FIXEDBLOCKS; 1050 else 1051 st->flags &= ~ST_FIXEDBLOCKS; 1052 st->blksize = st->media_blksize; 1053 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1054 ("Used media_blksize of %d\n", st->media_blksize)); 1055 goto done; 1056 } 1057 /* 1058 * We're getting no hints from any direction. Choose variable- 1059 * length blocks arbitrarily. 1060 */ 1061 st->flags &= ~ST_FIXEDBLOCKS; 1062 st->blksize = 0; 1063 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1064 ("Give up and default to variable mode\n")); 1065 1066 done: 1067 /* 1068 * Decide whether or not to write two file marks to signify end- 1069 * of-data. Make the decision as a function of density. If 1070 * the decision is not to use a second file mark, the SCSI BLANK 1071 * CHECK condition code will be recognized as end-of-data when 1072 * first read. 1073 * (I think this should be a by-product of fixed/variable..julian) 1074 */ 1075 switch (st->density) { 1076 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 1077 case QIC_11: 1078 case QIC_24: 1079 case QIC_120: 1080 case QIC_150: 1081 case QIC_525: 1082 case QIC_1320: 1083 case QIC_3095: 1084 case QIC_3220: 1085 st->flags &= ~ST_2FM_AT_EOD; 1086 break; 1087 default: 1088 st->flags |= ST_2FM_AT_EOD; 1089 } 1090 return (0); 1091 } 1092 1093 /* 1094 * Actually translate the requested transfer into 1095 * one the physical driver can understand 1096 * The transfer is described by a buf and will include 1097 * only one physical transfer. 1098 */ 1099 void 1100 ststrategy(bp) 1101 struct buf *bp; 1102 { 1103 struct st_softc *st = st_cd.cd_devs[STUNIT(bp->b_dev)]; 1104 int s; 1105 1106 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1107 ("ststrategy %ld bytes @ blk %" PRId64 "\n", bp->b_bcount, bp->b_blkno)); 1108 /* 1109 * If it's a null transfer, return immediatly 1110 */ 1111 if (bp->b_bcount == 0) 1112 goto done; 1113 1114 /* If offset is negative, error */ 1115 if (bp->b_blkno < 0) { 1116 bp->b_error = EINVAL; 1117 goto bad; 1118 } 1119 1120 /* 1121 * Odd sized request on fixed drives are verboten 1122 */ 1123 if (st->flags & ST_FIXEDBLOCKS) { 1124 if (bp->b_bcount % st->blksize) { 1125 printf("%s: bad request, must be multiple of %d\n", 1126 st->sc_dev.dv_xname, st->blksize); 1127 bp->b_error = EIO; 1128 goto bad; 1129 } 1130 } 1131 /* 1132 * as are out-of-range requests on variable drives. 1133 */ 1134 else if (bp->b_bcount < st->blkmin || 1135 (st->blkmax && bp->b_bcount > st->blkmax)) { 1136 printf("%s: bad request, must be between %d and %d\n", 1137 st->sc_dev.dv_xname, st->blkmin, st->blkmax); 1138 bp->b_error = EIO; 1139 goto bad; 1140 } 1141 s = splbio(); 1142 1143 /* 1144 * Place it in the queue of activities for this tape 1145 * at the end (a bit silly because we only have on user.. 1146 * (but it could fork())) 1147 */ 1148 BUFQ_PUT(&st->buf_queue, bp); 1149 1150 /* 1151 * Tell the device to get going on the transfer if it's 1152 * not doing anything, otherwise just wait for completion 1153 * (All a bit silly if we're only allowing 1 open but..) 1154 */ 1155 ststart(st->sc_periph); 1156 1157 splx(s); 1158 return; 1159 bad: 1160 bp->b_flags |= B_ERROR; 1161 done: 1162 /* 1163 * Correctly set the buf to indicate a completed xfer 1164 */ 1165 bp->b_resid = bp->b_bcount; 1166 biodone(bp); 1167 return; 1168 } 1169 1170 /* 1171 * ststart looks to see if there is a buf waiting for the device 1172 * and that the device is not already busy. If both are true, 1173 * It dequeues the buf and creates a scsi command to perform the 1174 * transfer required. The transfer request will call scsipi_done 1175 * on completion, which will in turn call this routine again 1176 * so that the next queued transfer is performed. 1177 * The bufs are queued by the strategy routine (ststrategy) 1178 * 1179 * This routine is also called after other non-queued requests 1180 * have been made of the scsi driver, to ensure that the queue 1181 * continues to be drained. 1182 * ststart() is called at splbio 1183 */ 1184 void 1185 ststart(periph) 1186 struct scsipi_periph *periph; 1187 { 1188 struct st_softc *st = (void *)periph->periph_dev; 1189 struct buf *bp; 1190 struct scsi_rw_tape cmd; 1191 struct scsipi_xfer *xs; 1192 int flags, error; 1193 1194 SC_DEBUG(periph, SCSIPI_DB2, ("ststart ")); 1195 /* 1196 * See if there is a buf to do and we are not already 1197 * doing one 1198 */ 1199 while (periph->periph_active < periph->periph_openings) { 1200 /* if a special awaits, let it proceed first */ 1201 if (periph->periph_flags & PERIPH_WAITING) { 1202 periph->periph_flags &= ~PERIPH_WAITING; 1203 wakeup((caddr_t)periph); 1204 return; 1205 } 1206 1207 /* 1208 * If the device has been unmounted by the user 1209 * then throw away all requests until done. 1210 */ 1211 if (__predict_false((st->flags & ST_MOUNTED) == 0 || 1212 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0)) { 1213 if ((bp = BUFQ_GET(&st->buf_queue)) != NULL) { 1214 /* make sure that one implies the other.. */ 1215 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 1216 bp->b_flags |= B_ERROR; 1217 bp->b_error = EIO; 1218 bp->b_resid = bp->b_bcount; 1219 biodone(bp); 1220 continue; 1221 } else { 1222 return; 1223 } 1224 } 1225 1226 if ((bp = BUFQ_PEEK(&st->buf_queue)) == NULL) 1227 return; 1228 1229 /* 1230 * only FIXEDBLOCK devices have pending I/O or space operations. 1231 */ 1232 if (st->flags & ST_FIXEDBLOCKS) { 1233 /* 1234 * If we are at a filemark but have not reported it yet 1235 * then we should report it now 1236 */ 1237 if (st->flags & ST_AT_FILEMARK) { 1238 if ((bp->b_flags & B_READ) == B_WRITE) { 1239 /* 1240 * Handling of ST_AT_FILEMARK in 1241 * st_space will fill in the right file 1242 * mark count. 1243 * Back up over filemark 1244 */ 1245 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1246 BUFQ_GET(&st->buf_queue); 1247 bp->b_flags |= B_ERROR; 1248 bp->b_error = EIO; 1249 biodone(bp); 1250 continue; 1251 } 1252 } else { 1253 BUFQ_GET(&st->buf_queue); 1254 bp->b_resid = bp->b_bcount; 1255 bp->b_error = 0; 1256 bp->b_flags &= ~B_ERROR; 1257 st->flags &= ~ST_AT_FILEMARK; 1258 biodone(bp); 1259 continue; /* seek more work */ 1260 } 1261 } 1262 } 1263 /* 1264 * If we are at EOM but have not reported it 1265 * yet then we should report it now. 1266 */ 1267 if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { 1268 BUFQ_GET(&st->buf_queue); 1269 bp->b_resid = bp->b_bcount; 1270 if (st->flags & ST_EIO_PENDING) { 1271 bp->b_error = EIO; 1272 bp->b_flags |= B_ERROR; 1273 } 1274 st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); 1275 biodone(bp); 1276 continue; /* seek more work */ 1277 } 1278 1279 /* 1280 * Fill out the scsi command 1281 */ 1282 memset(&cmd, 0, sizeof(cmd)); 1283 flags = XS_CTL_NOSLEEP | XS_CTL_ASYNC; 1284 if ((bp->b_flags & B_READ) == B_WRITE) { 1285 cmd.opcode = WRITE; 1286 st->flags &= ~ST_FM_WRITTEN; 1287 flags |= XS_CTL_DATA_OUT; 1288 } else { 1289 cmd.opcode = READ; 1290 flags |= XS_CTL_DATA_IN; 1291 } 1292 1293 /* 1294 * Handle "fixed-block-mode" tape drives by using the 1295 * block count instead of the length. 1296 */ 1297 if (st->flags & ST_FIXEDBLOCKS) { 1298 cmd.byte2 |= SRW_FIXED; 1299 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1300 } else 1301 _lto3b(bp->b_bcount, cmd.len); 1302 1303 /* 1304 * Clear 'position updated' indicator 1305 */ 1306 st->flags &= ~ST_POSUPDATED; 1307 1308 /* 1309 * go ask the adapter to do all this for us 1310 */ 1311 xs = scsipi_make_xs(periph, 1312 (struct scsipi_generic *)&cmd, sizeof(cmd), 1313 (u_char *)bp->b_data, bp->b_bcount, 1314 0, ST_IO_TIME, bp, flags); 1315 if (__predict_false(xs == NULL)) { 1316 /* 1317 * out of memory. Keep this buffer in the queue, and 1318 * retry later. 1319 */ 1320 callout_reset(&st->sc_callout, hz / 2, strestart, 1321 periph); 1322 return; 1323 } 1324 /* 1325 * need to dequeue the buffer before queuing the command, 1326 * because cdstart may be called recursively from the 1327 * HBA driver 1328 */ 1329 #ifdef DIAGNOSTIC 1330 if (BUFQ_GET(&st->buf_queue) != bp) 1331 panic("ststart(): dequeued wrong buf"); 1332 #else 1333 BUFQ_GET(&st->buf_queue); 1334 #endif 1335 error = scsipi_command(periph, xs, 1336 (struct scsipi_generic *)&cmd, sizeof(cmd), 1337 (u_char *)bp->b_data, bp->b_bcount, 1338 0, ST_IO_TIME, bp, flags); 1339 /* with a scsipi_xfer preallocated, scsipi_command can't fail */ 1340 KASSERT(error == 0); 1341 } /* go back and see if we can cram more work in.. */ 1342 } 1343 1344 void 1345 strestart(void *v) 1346 { 1347 int s = splbio(); 1348 ststart((struct scsipi_periph *)v); 1349 splx(s); 1350 } 1351 1352 1353 void 1354 stdone(xs) 1355 struct scsipi_xfer *xs; 1356 { 1357 struct st_softc *st = (void *)xs->xs_periph->periph_dev; 1358 1359 if (xs->bp != NULL) { 1360 if ((xs->bp->b_flags & B_READ) == B_WRITE) { 1361 st->flags |= ST_WRITTEN; 1362 } else { 1363 st->flags &= ~ST_WRITTEN; 1364 } 1365 #if NRND > 0 1366 rnd_add_uint32(&st->rnd_source, xs->bp->b_blkno); 1367 #endif 1368 1369 if ((st->flags & ST_POSUPDATED) == 0) { 1370 if (xs->bp->b_flags & B_ERROR) { 1371 st->fileno = st->blkno = -1; 1372 } else if (st->blkno != -1) { 1373 if (st->flags & ST_FIXEDBLOCKS) { 1374 st->blkno += 1375 (xs->bp->b_bcount / st->blksize); 1376 } else { 1377 st->blkno++; 1378 } 1379 } 1380 } 1381 } 1382 } 1383 1384 int 1385 stread(dev, uio, iomode) 1386 dev_t dev; 1387 struct uio *uio; 1388 int iomode; 1389 { 1390 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1391 1392 return (physio(ststrategy, NULL, dev, B_READ, 1393 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1394 } 1395 1396 int 1397 stwrite(dev, uio, iomode) 1398 dev_t dev; 1399 struct uio *uio; 1400 int iomode; 1401 { 1402 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1403 1404 return (physio(ststrategy, NULL, dev, B_WRITE, 1405 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1406 } 1407 1408 /* 1409 * Perform special action on behalf of the user; 1410 * knows about the internals of this device 1411 */ 1412 int 1413 stioctl(dev, cmd, arg, flag, p) 1414 dev_t dev; 1415 u_long cmd; 1416 caddr_t arg; 1417 int flag; 1418 struct proc *p; 1419 { 1420 int error = 0; 1421 int unit; 1422 int number, nmarks, dsty; 1423 int flags; 1424 struct st_softc *st; 1425 int hold_blksize; 1426 u_int8_t hold_density; 1427 struct mtop *mt = (struct mtop *) arg; 1428 1429 /* 1430 * Find the device that the user is talking about 1431 */ 1432 flags = 0; /* give error messages, act on errors etc. */ 1433 unit = STUNIT(dev); 1434 dsty = STDSTY(dev); 1435 st = st_cd.cd_devs[unit]; 1436 hold_blksize = st->blksize; 1437 hold_density = st->density; 1438 1439 switch ((u_int) cmd) { 1440 1441 case MTIOCGET: { 1442 struct mtget *g = (struct mtget *) arg; 1443 /* 1444 * (to get the current state of READONLY) 1445 */ 1446 error = st->ops(st, ST_OPS_MODESENSE, XS_CTL_SILENT); 1447 if (error) { 1448 /* 1449 * Ignore the error if in control mode; 1450 * this is mandated by st(4). 1451 */ 1452 if (STMODE(dev) != CTRL_MODE) 1453 break; 1454 error = 0; 1455 } 1456 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("[ioctl: get status]\n")); 1457 memset(g, 0, sizeof(struct mtget)); 1458 g->mt_type = 0x7; /* Ultrix compat *//*? */ 1459 g->mt_blksiz = st->blksize; 1460 g->mt_density = st->density; 1461 g->mt_mblksiz[0] = st->modes[0].blksize; 1462 g->mt_mblksiz[1] = st->modes[1].blksize; 1463 g->mt_mblksiz[2] = st->modes[2].blksize; 1464 g->mt_mblksiz[3] = st->modes[3].blksize; 1465 g->mt_mdensity[0] = st->modes[0].density; 1466 g->mt_mdensity[1] = st->modes[1].density; 1467 g->mt_mdensity[2] = st->modes[2].density; 1468 g->mt_mdensity[3] = st->modes[3].density; 1469 g->mt_fileno = st->fileno; 1470 g->mt_blkno = st->blkno; 1471 if (st->flags & ST_READONLY) 1472 g->mt_dsreg |= MT_DS_RDONLY; 1473 if (st->flags & ST_MOUNTED) 1474 g->mt_dsreg |= MT_DS_MOUNTED; 1475 g->mt_resid = st->mt_resid; 1476 g->mt_erreg = st->mt_erreg; 1477 /* 1478 * clear latched errors. 1479 */ 1480 st->mt_resid = 0; 1481 st->mt_erreg = 0; 1482 st->asc = 0; 1483 st->ascq = 0; 1484 break; 1485 } 1486 case MTIOCTOP: { 1487 1488 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1489 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1490 mt->mt_count)); 1491 1492 /* compat: in U*x it is a short */ 1493 number = mt->mt_count; 1494 switch ((short) (mt->mt_op)) { 1495 case MTWEOF: /* write an end-of-file record */ 1496 error = st_write_filemarks(st, number, flags); 1497 break; 1498 case MTBSF: /* backward space file */ 1499 number = -number; 1500 case MTFSF: /* forward space file */ 1501 error = st_check_eod(st, FALSE, &nmarks, flags); 1502 if (!error) 1503 error = st_space(st, number - nmarks, 1504 SP_FILEMARKS, flags); 1505 break; 1506 case MTBSR: /* backward space record */ 1507 number = -number; 1508 case MTFSR: /* forward space record */ 1509 error = st_check_eod(st, TRUE, &nmarks, flags); 1510 if (!error) 1511 error = st_space(st, number, SP_BLKS, flags); 1512 break; 1513 case MTREW: /* rewind */ 1514 error = st_rewind(st, 0, flags); 1515 break; 1516 case MTOFFL: /* rewind and put the drive offline */ 1517 st_unmount(st, EJECT); 1518 break; 1519 case MTNOP: /* no operation, sets status only */ 1520 break; 1521 case MTRETEN: /* retension the tape */ 1522 error = st_load(st, LD_RETENSION, flags); 1523 if (!error) 1524 error = st_load(st, LD_LOAD, flags); 1525 break; 1526 case MTEOM: /* forward space to end of media */ 1527 error = st_check_eod(st, FALSE, &nmarks, flags); 1528 if (!error) 1529 error = st_space(st, 1, SP_EOM, flags); 1530 break; 1531 case MTCACHE: /* enable controller cache */ 1532 st->flags &= ~ST_DONTBUFFER; 1533 goto try_new_value; 1534 case MTNOCACHE: /* disable controller cache */ 1535 st->flags |= ST_DONTBUFFER; 1536 goto try_new_value; 1537 case MTERASE: /* erase volume */ 1538 error = st_erase(st, number, flags); 1539 break; 1540 case MTSETBSIZ: /* Set block size for device */ 1541 #ifdef NOTYET 1542 if (!(st->flags & ST_NEW_MOUNT)) { 1543 uprintf("re-mount tape before changing blocksize"); 1544 error = EINVAL; 1545 break; 1546 } 1547 #endif 1548 if (number == 0) 1549 st->flags &= ~ST_FIXEDBLOCKS; 1550 else { 1551 if ((st->blkmin || st->blkmax) && 1552 (number < st->blkmin || 1553 number > st->blkmax)) { 1554 error = EINVAL; 1555 break; 1556 } 1557 st->flags |= ST_FIXEDBLOCKS; 1558 } 1559 st->blksize = number; 1560 st->flags |= ST_BLOCK_SET; /*XXX */ 1561 goto try_new_value; 1562 1563 case MTSETDNSTY: /* Set density for device and mode */ 1564 /* 1565 * Any number >= 0 and <= 0xff is legal. Numbers 1566 * above 0x80 are 'vendor unique'. 1567 */ 1568 if (number < 0 || number > 255) { 1569 error = EINVAL; 1570 break; 1571 } else 1572 st->density = number; 1573 goto try_new_value; 1574 1575 case MTCMPRESS: 1576 error = st->ops(st, (number == 0) ? 1577 ST_OPS_CMPRSS_OFF : ST_OPS_CMPRSS_ON, 1578 XS_CTL_SILENT); 1579 break; 1580 1581 case MTEWARN: 1582 if (number) 1583 st->flags |= ST_EARLYWARN; 1584 else 1585 st->flags &= ~ST_EARLYWARN; 1586 break; 1587 1588 default: 1589 error = EINVAL; 1590 } 1591 break; 1592 } 1593 case MTIOCIEOT: 1594 case MTIOCEEOT: 1595 break; 1596 1597 case MTIOCRDSPOS: 1598 error = st_rdpos(st, 0, (u_int32_t *) arg); 1599 break; 1600 1601 case MTIOCRDHPOS: 1602 error = st_rdpos(st, 1, (u_int32_t *) arg); 1603 break; 1604 1605 case MTIOCSLOCATE: 1606 error = st_setpos(st, 0, (u_int32_t *) arg); 1607 break; 1608 1609 case MTIOCHLOCATE: 1610 error = st_setpos(st, 1, (u_int32_t *) arg); 1611 break; 1612 1613 1614 default: 1615 error = scsipi_do_ioctl(st->sc_periph, dev, cmd, arg, 1616 flag, p); 1617 break; 1618 } 1619 return (error); 1620 /*-----------------------------*/ 1621 try_new_value: 1622 /* 1623 * Check that the mode being asked for is aggreeable to the 1624 * drive. If not, put it back the way it was. 1625 * 1626 * If in control mode, we can make (persistent) mode changes 1627 * even if no medium is loaded (see st(4)). 1628 */ 1629 if ((STMODE(dev) != CTRL_MODE || (st->flags & ST_MOUNTED) != 0) && 1630 (error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 1631 /* put it back as it was */ 1632 printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); 1633 st->density = hold_density; 1634 st->blksize = hold_blksize; 1635 if (st->blksize) 1636 st->flags |= ST_FIXEDBLOCKS; 1637 else 1638 st->flags &= ~ST_FIXEDBLOCKS; 1639 return (error); 1640 } 1641 /* 1642 * As the drive liked it, if we are setting a new default, 1643 * set it into the structures as such. 1644 * 1645 * The means for deciding this are not finalised yet- but 1646 * if the device was opened in Control Mode, the values 1647 * are persistent now across mounts. 1648 */ 1649 if (STMODE(dev) == CTRL_MODE) { 1650 switch ((short) (mt->mt_op)) { 1651 case MTSETBSIZ: 1652 st->modes[dsty].blksize = st->blksize; 1653 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1654 break; 1655 case MTSETDNSTY: 1656 st->modes[dsty].density = st->density; 1657 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1658 break; 1659 } 1660 } 1661 return (0); 1662 } 1663 1664 /* 1665 * Do a synchronous read. 1666 */ 1667 int 1668 st_read(st, buf, size, flags) 1669 struct st_softc *st; 1670 int size; 1671 int flags; 1672 char *buf; 1673 { 1674 struct scsi_rw_tape cmd; 1675 1676 /* 1677 * If it's a null transfer, return immediatly 1678 */ 1679 if (size == 0) 1680 return (0); 1681 memset(&cmd, 0, sizeof(cmd)); 1682 cmd.opcode = READ; 1683 if (st->flags & ST_FIXEDBLOCKS) { 1684 cmd.byte2 |= SRW_FIXED; 1685 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1686 cmd.len); 1687 } else 1688 _lto3b(size, cmd.len); 1689 return (scsipi_command(st->sc_periph, NULL, 1690 (struct scsipi_generic *)&cmd, sizeof(cmd), 1691 (u_char *)buf, size, 0, ST_IO_TIME, NULL, flags | XS_CTL_DATA_IN)); 1692 } 1693 1694 /* 1695 * issue an erase command 1696 */ 1697 int 1698 st_erase(st, full, flags) 1699 struct st_softc *st; 1700 int full, flags; 1701 { 1702 int tmo; 1703 struct scsi_erase cmd; 1704 1705 /* 1706 * Full erase means set LONG bit in erase command, which asks 1707 * the drive to erase the entire unit. Without this bit, we're 1708 * asking the drive to write an erase gap. 1709 */ 1710 memset(&cmd, 0, sizeof(cmd)); 1711 cmd.opcode = ERASE; 1712 if (full) { 1713 cmd.byte2 = SE_LONG; 1714 tmo = ST_SPC_TIME; 1715 } else { 1716 tmo = ST_IO_TIME; 1717 } 1718 1719 /* 1720 * XXX We always do this asynchronously, for now, unless the device 1721 * has the ST_Q_ERASE_NOIMM quirk. How long should we wait if we 1722 * want to (eventually) to it synchronously? 1723 */ 1724 if ((st->quirks & ST_Q_ERASE_NOIMM) == 0) 1725 cmd.byte2 |= SE_IMMED; 1726 1727 return (scsipi_command(st->sc_periph, NULL, 1728 (struct scsipi_generic *)&cmd, sizeof(cmd), 1729 0, 0, ST_RETRIES, tmo, NULL, flags)); 1730 } 1731 1732 /* 1733 * skip N blocks/filemarks/seq filemarks/eom 1734 */ 1735 int 1736 st_space(st, number, what, flags) 1737 struct st_softc *st; 1738 u_int what; 1739 int flags; 1740 int number; 1741 { 1742 struct scsi_space cmd; 1743 int error; 1744 1745 switch (what) { 1746 case SP_BLKS: 1747 if (st->flags & ST_PER_ACTION) { 1748 if (number > 0) { 1749 st->flags &= ~ST_PER_ACTION; 1750 return (EIO); 1751 } else if (number < 0) { 1752 if (st->flags & ST_AT_FILEMARK) { 1753 /* 1754 * Handling of ST_AT_FILEMARK 1755 * in st_space will fill in the 1756 * right file mark count. 1757 */ 1758 error = st_space(st, 0, SP_FILEMARKS, 1759 flags); 1760 if (error) 1761 return (error); 1762 } 1763 if (st->flags & ST_BLANK_READ) { 1764 st->flags &= ~ST_BLANK_READ; 1765 return (EIO); 1766 } 1767 st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); 1768 } 1769 } 1770 break; 1771 case SP_FILEMARKS: 1772 if (st->flags & ST_EIO_PENDING) { 1773 if (number > 0) { 1774 /* pretend we just discovered the error */ 1775 st->flags &= ~ST_EIO_PENDING; 1776 return (EIO); 1777 } else if (number < 0) { 1778 /* back away from the error */ 1779 st->flags &= ~ST_EIO_PENDING; 1780 } 1781 } 1782 if (st->flags & ST_AT_FILEMARK) { 1783 st->flags &= ~ST_AT_FILEMARK; 1784 number--; 1785 } 1786 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 1787 /* back away from unwritten tape */ 1788 st->flags &= ~ST_BLANK_READ; 1789 number++; /* XXX dubious */ 1790 } 1791 break; 1792 case SP_EOM: 1793 if (st->flags & ST_EOM_PENDING) { 1794 /* we're already there */ 1795 st->flags &= ~ST_EOM_PENDING; 1796 return (0); 1797 } 1798 if (st->flags & ST_EIO_PENDING) { 1799 /* pretend we just discovered the error */ 1800 st->flags &= ~ST_EIO_PENDING; 1801 return (EIO); 1802 } 1803 if (st->flags & ST_AT_FILEMARK) 1804 st->flags &= ~ST_AT_FILEMARK; 1805 break; 1806 } 1807 if (number == 0) 1808 return (0); 1809 1810 memset(&cmd, 0, sizeof(cmd)); 1811 cmd.opcode = SPACE; 1812 cmd.byte2 = what; 1813 _lto3b(number, cmd.number); 1814 1815 st->flags &= ~ST_POSUPDATED; 1816 st->last_ctl_resid = 0; 1817 error = scsipi_command(st->sc_periph, NULL, 1818 (struct scsipi_generic *)&cmd, sizeof(cmd), 1819 0, 0, 0, ST_SPC_TIME, NULL, flags); 1820 1821 if (error == 0 && (st->flags & ST_POSUPDATED) == 0) { 1822 number = number - st->last_ctl_resid; 1823 if (what == SP_BLKS) { 1824 if (st->blkno != -1) { 1825 st->blkno += number; 1826 } 1827 } else if (what == SP_FILEMARKS) { 1828 if (st->fileno != -1) { 1829 st->fileno += number; 1830 if (number > 0) { 1831 st->blkno = 0; 1832 } else if (number < 0) { 1833 st->blkno = -1; 1834 } 1835 } 1836 } else if (what == SP_EOM) { 1837 /* 1838 * This loses us relative position. 1839 */ 1840 st->fileno = st->blkno = -1; 1841 } 1842 } 1843 return (error); 1844 } 1845 1846 /* 1847 * write N filemarks 1848 */ 1849 int 1850 st_write_filemarks(st, number, flags) 1851 struct st_softc *st; 1852 int flags; 1853 int number; 1854 { 1855 int error; 1856 struct scsi_write_filemarks cmd; 1857 1858 /* 1859 * It's hard to write a negative number of file marks. 1860 * Don't try. 1861 */ 1862 if (number < 0) 1863 return (EINVAL); 1864 switch (number) { 1865 case 0: /* really a command to sync the drive's buffers */ 1866 break; 1867 case 1: 1868 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 1869 st->flags &= ~ST_WRITTEN; 1870 else 1871 st->flags |= ST_FM_WRITTEN; 1872 st->flags &= ~ST_PER_ACTION; 1873 break; 1874 default: 1875 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 1876 } 1877 1878 memset(&cmd, 0, sizeof(cmd)); 1879 cmd.opcode = WRITE_FILEMARKS; 1880 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1881 cmd.byte2 = SR_IMMED; 1882 /* 1883 * The ATAPI Onstream DI-30 doesn't support writing filemarks, but 1884 * WRITE_FILEMARKS is still used to flush the buffer 1885 */ 1886 if ((st->quirks & ST_Q_NOFILEMARKS) == 0) 1887 _lto3b(number, cmd.number); 1888 1889 /* XXX WE NEED TO BE ABLE TO GET A RESIDIUAL XXX */ 1890 error = scsipi_command(st->sc_periph, NULL, 1891 (struct scsipi_generic *)&cmd, sizeof(cmd), 1892 0, 0, 0, ST_IO_TIME * 4, NULL, flags); 1893 if (error == 0 && st->fileno != -1) { 1894 st->fileno += number; 1895 } 1896 return (error); 1897 } 1898 1899 /* 1900 * Make sure the right number of file marks is on tape if the 1901 * tape has been written. If the position argument is true, 1902 * leave the tape positioned where it was originally. 1903 * 1904 * nmarks returns the number of marks to skip (or, if position 1905 * true, which were skipped) to get back original position. 1906 */ 1907 int 1908 st_check_eod(st, position, nmarks, flags) 1909 struct st_softc *st; 1910 boolean position; 1911 int *nmarks; 1912 int flags; 1913 { 1914 int error; 1915 1916 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 1917 default: 1918 *nmarks = 0; 1919 return (0); 1920 case ST_WRITTEN: 1921 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 1922 *nmarks = 1; 1923 break; 1924 case ST_WRITTEN | ST_2FM_AT_EOD: 1925 *nmarks = 2; 1926 } 1927 error = st_write_filemarks(st, *nmarks, flags); 1928 if (position && !error) 1929 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 1930 return (error); 1931 } 1932 1933 /* 1934 * load/unload/retension 1935 */ 1936 int 1937 st_load(st, type, flags) 1938 struct st_softc *st; 1939 u_int type; 1940 int flags; 1941 { 1942 int error; 1943 struct scsi_load cmd; 1944 1945 if (type != LD_LOAD) { 1946 int nmarks; 1947 1948 error = st_check_eod(st, FALSE, &nmarks, flags); 1949 if (error) { 1950 printf("%s: failed to write closing filemarks at " 1951 "unload, errno=%d\n", st->sc_dev.dv_xname, error); 1952 return (error); 1953 } 1954 } 1955 if (st->quirks & ST_Q_IGNORE_LOADS) { 1956 if (type == LD_LOAD) { 1957 /* 1958 * If we ignore loads, at least we should try a rewind. 1959 */ 1960 return st_rewind(st, 0, flags); 1961 } 1962 /* otherwise, we should do what's asked of us */ 1963 } 1964 1965 memset(&cmd, 0, sizeof(cmd)); 1966 cmd.opcode = LOAD; 1967 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1968 cmd.byte2 = SR_IMMED; 1969 cmd.how = type; 1970 1971 error = scsipi_command(st->sc_periph, NULL, 1972 (struct scsipi_generic *)&cmd, sizeof(cmd), 1973 0, 0, ST_RETRIES, ST_SPC_TIME, NULL, flags); 1974 if (error) { 1975 printf("%s: error %d in st_load (op %d)\n", 1976 st->sc_dev.dv_xname, error, type); 1977 } 1978 return (error); 1979 } 1980 1981 /* 1982 * Rewind the device 1983 */ 1984 int 1985 st_rewind(st, immediate, flags) 1986 struct st_softc *st; 1987 u_int immediate; 1988 int flags; 1989 { 1990 struct scsi_rewind cmd; 1991 int error; 1992 int nmarks; 1993 1994 error = st_check_eod(st, FALSE, &nmarks, flags); 1995 if (error) { 1996 printf("%s: failed to write closing filemarks at " 1997 "rewind, errno=%d\n", st->sc_dev.dv_xname, error); 1998 return (error); 1999 } 2000 st->flags &= ~ST_PER_ACTION; 2001 2002 /* 2003 * ATAPI tapes always need immediate to be set 2004 */ 2005 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 2006 immediate = SR_IMMED; 2007 2008 memset(&cmd, 0, sizeof(cmd)); 2009 cmd.opcode = REWIND; 2010 cmd.byte2 = immediate; 2011 2012 error = scsipi_command(st->sc_periph, NULL, 2013 (struct scsipi_generic *)&cmd, sizeof(cmd), 0, 0, ST_RETRIES, 2014 immediate ? ST_CTL_TIME: ST_SPC_TIME, NULL, flags); 2015 if (error) { 2016 printf("%s: error %d trying to rewind\n", 2017 st->sc_dev.dv_xname, error); 2018 /* lost position */ 2019 st->fileno = st->blkno = -1; 2020 } else { 2021 st->fileno = st->blkno = 0; 2022 } 2023 return (error); 2024 } 2025 2026 int 2027 st_rdpos(st, hard, blkptr) 2028 struct st_softc *st; 2029 int hard; 2030 u_int32_t *blkptr; 2031 { 2032 int error; 2033 u_int8_t posdata[20]; 2034 struct scsi_tape_read_position cmd; 2035 2036 /* 2037 * We try and flush any buffered writes here if we were writing 2038 * and we're trying to get hardware block position. It eats 2039 * up performance substantially, but I'm wary of drive firmware. 2040 * 2041 * I think that *logical* block position is probably okay- 2042 * but hardware block position might have to wait for data 2043 * to hit media to be valid. Caveat Emptor. 2044 */ 2045 2046 if (hard && (st->flags & ST_WRITTEN)) { 2047 /* 2048 * First flush any pending writes... 2049 */ 2050 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 2051 /* 2052 * The latter case is for 'write protected' tapes 2053 * which are too stupid to recognize a zero count 2054 * for writing filemarks as a no-op. 2055 */ 2056 if (error != 0 && error != EACCES && error != EROFS) 2057 return (error); 2058 } 2059 2060 memset(&cmd, 0, sizeof(cmd)); 2061 memset(&posdata, 0, sizeof(posdata)); 2062 cmd.opcode = READ_POSITION; 2063 if (hard) 2064 cmd.byte1 = 1; 2065 2066 error = scsipi_command(st->sc_periph, NULL, 2067 (struct scsipi_generic *)&cmd, sizeof(cmd), (u_char *)&posdata, 2068 sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, 2069 XS_CTL_SILENT | XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); 2070 2071 if (error == 0) { 2072 #if 0 2073 printf("posdata:"); 2074 for (hard = 0; hard < sizeof(posdata); hard++) 2075 printf("%02x ", posdata[hard] & 0xff); 2076 printf("\n"); 2077 #endif 2078 if (posdata[0] & 0x4) /* Block Position Unknown */ 2079 error = EINVAL; 2080 else 2081 *blkptr = _4btol(&posdata[4]); 2082 } 2083 return (error); 2084 } 2085 2086 int 2087 st_setpos(st, hard, blkptr) 2088 struct st_softc *st; 2089 int hard; 2090 u_int32_t *blkptr; 2091 { 2092 int error; 2093 struct scsi_tape_locate cmd; 2094 2095 /* 2096 * We used to try and flush any buffered writes here. 2097 * Now we push this onto user applications to either 2098 * flush the pending writes themselves (via a zero count 2099 * WRITE FILEMARKS command) or they can trust their tape 2100 * drive to do this correctly for them. 2101 * 2102 * There are very ugly performance limitations otherwise. 2103 */ 2104 2105 memset(&cmd, 0, sizeof(cmd)); 2106 cmd.opcode = LOCATE; 2107 if (hard) 2108 cmd.byte2 = 1 << 2; 2109 _lto4b(*blkptr, cmd.blkaddr); 2110 error = scsipi_command(st->sc_periph, NULL, 2111 (struct scsipi_generic *)&cmd, sizeof(cmd), 2112 NULL, 0, ST_RETRIES, ST_SPC_TIME, NULL, 0); 2113 /* 2114 * Note file && block number position now unknown (if 2115 * these things ever start being maintained in this driver) 2116 */ 2117 st->fileno = st->blkno = -1; 2118 return (error); 2119 } 2120 2121 2122 /* 2123 * Look at the returned sense and act on the error and determine 2124 * the unix error number to pass back..., 0 (== report no error), 2125 * -1 = retry the operation, -2 continue error processing. 2126 */ 2127 int 2128 st_interpret_sense(xs) 2129 struct scsipi_xfer *xs; 2130 { 2131 struct scsipi_periph *periph = xs->xs_periph; 2132 struct scsipi_sense_data *sense = &xs->sense.scsi_sense; 2133 struct buf *bp = xs->bp; 2134 struct st_softc *st = (void *)periph->periph_dev; 2135 int retval = EJUSTRETURN; 2136 int doprint = ((xs->xs_control & XS_CTL_SILENT) == 0); 2137 u_int8_t key; 2138 int32_t info; 2139 2140 /* 2141 * If it isn't a extended or extended/deferred error, let 2142 * the generic code handle it. 2143 */ 2144 if ((sense->error_code & SSD_ERRCODE) != 0x70 && 2145 (sense->error_code & SSD_ERRCODE) != 0x71) { /* DEFFERRED */ 2146 return (retval); 2147 } 2148 2149 if (sense->error_code & SSD_ERRCODE_VALID) 2150 info = _4btol(sense->info); 2151 else 2152 info = (st->flags & ST_FIXEDBLOCKS) ? 2153 xs->datalen / st->blksize : xs->datalen; 2154 key = sense->flags & SSD_KEY; 2155 st->mt_erreg = key; 2156 st->asc = sense->add_sense_code; 2157 st->ascq = sense->add_sense_code_qual; 2158 st->mt_resid = (short) info; 2159 2160 if (key == SKEY_NOT_READY && st->asc == 0x4 && st->ascq == 0x1) { 2161 /* Not Ready, Logical Unit Is in Process Of Becoming Ready */ 2162 if (!callout_pending(&periph->periph_callout)) 2163 scsipi_periph_freeze(periph, 1); 2164 callout_reset(&periph->periph_callout, 2165 hz, scsipi_periph_timed_thaw, periph); 2166 return (ERESTART); 2167 } 2168 2169 /* 2170 * If the device is not open yet, let generic handle 2171 */ 2172 if ((periph->periph_flags & PERIPH_OPEN) == 0) { 2173 return (retval); 2174 } 2175 2176 xs->resid = info; 2177 if (st->flags & ST_FIXEDBLOCKS) { 2178 if (bp) { 2179 xs->resid *= st->blksize; 2180 st->last_io_resid = xs->resid; 2181 } else { 2182 st->last_ctl_resid = xs->resid; 2183 } 2184 if (key == SKEY_VOLUME_OVERFLOW) { 2185 st->flags |= ST_EIO_PENDING; 2186 if (bp) 2187 bp->b_resid = xs->resid; 2188 } else if (sense->flags & SSD_EOM) { 2189 if ((st->flags & ST_EARLYWARN) == 0) 2190 st->flags |= ST_EIO_PENDING; 2191 st->flags |= ST_EOM_PENDING; 2192 if (bp) { 2193 #if 0 2194 bp->b_resid = xs->resid; 2195 #else 2196 /* 2197 * Grotesque as it seems, the few times 2198 * I've actually seen a non-zero resid, 2199 * the tape drive actually lied and had 2200 * written all the data! 2201 */ 2202 bp->b_resid = 0; 2203 #endif 2204 } 2205 } 2206 if (sense->flags & SSD_FILEMARK) { 2207 st->flags |= ST_AT_FILEMARK; 2208 if (bp) 2209 bp->b_resid = xs->resid; 2210 if (st->fileno != (daddr_t) -1) { 2211 st->fileno++; 2212 st->blkno = 0; 2213 st->flags |= ST_POSUPDATED; 2214 } 2215 } 2216 if (sense->flags & SSD_ILI) { 2217 st->flags |= ST_EIO_PENDING; 2218 if (bp) 2219 bp->b_resid = xs->resid; 2220 if (sense->error_code & SSD_ERRCODE_VALID && 2221 (xs->xs_control & XS_CTL_SILENT) == 0) 2222 printf("%s: block wrong size, %d blocks " 2223 "residual\n", st->sc_dev.dv_xname, info); 2224 2225 /* 2226 * This quirk code helps the drive read 2227 * the first tape block, regardless of 2228 * format. That is required for these 2229 * drives to return proper MODE SENSE 2230 * information. 2231 */ 2232 if ((st->quirks & ST_Q_SENSE_HELP) && 2233 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 2234 st->blksize -= 512; 2235 else if ((st->flags & ST_POSUPDATED) == 0) { 2236 if (st->blkno != (daddr_t) -1) { 2237 st->blkno += 2238 (xs->datalen / st->blksize); 2239 st->flags |= ST_POSUPDATED; 2240 } 2241 } 2242 } 2243 /* 2244 * If data wanted and no data was transferred, do it immediately 2245 */ 2246 if (xs->datalen && xs->resid >= xs->datalen) { 2247 if (st->flags & ST_EIO_PENDING) 2248 return (EIO); 2249 if (st->flags & ST_AT_FILEMARK) { 2250 if (bp) 2251 bp->b_resid = xs->resid; 2252 return (0); 2253 } 2254 } 2255 } else { /* must be variable mode */ 2256 if (bp) { 2257 st->last_io_resid = xs->resid; 2258 } else { 2259 st->last_ctl_resid = xs->resid; 2260 } 2261 if (sense->flags & SSD_EOM) { 2262 /* 2263 * The current semantics of this 2264 * driver requires EOM detection 2265 * to return EIO unless early 2266 * warning detection is enabled 2267 * for variable mode (this is always 2268 * on for fixed block mode). 2269 */ 2270 if (st->flags & ST_EARLYWARN) { 2271 st->flags |= ST_EOM_PENDING; 2272 retval = 0; 2273 } else { 2274 retval = EIO; 2275 } 2276 2277 /* 2278 * If it's an unadorned EOM detection, 2279 * suppress printing an error. 2280 */ 2281 if (key == SKEY_NO_SENSE) { 2282 doprint = 0; 2283 } 2284 } else if (sense->flags & SSD_FILEMARK) { 2285 retval = 0; 2286 if (st->fileno != (daddr_t) -1) { 2287 st->fileno++; 2288 st->blkno = 0; 2289 st->flags |= ST_POSUPDATED; 2290 } 2291 } else if (sense->flags & SSD_ILI) { 2292 if (info < 0) { 2293 /* 2294 * The tape record was bigger than the read 2295 * we issued. 2296 */ 2297 if ((xs->xs_control & XS_CTL_SILENT) == 0) { 2298 printf("%s: %d-byte tape record too big" 2299 " for %d-byte user buffer\n", 2300 st->sc_dev.dv_xname, 2301 xs->datalen - info, xs->datalen); 2302 } 2303 retval = EIO; 2304 } else { 2305 retval = 0; 2306 if (st->blkno != (daddr_t) -1) { 2307 st->blkno++; 2308 st->flags |= ST_POSUPDATED; 2309 } 2310 } 2311 } 2312 if (bp) 2313 bp->b_resid = info; 2314 } 2315 2316 #ifndef SCSIPI_DEBUG 2317 if (retval == 0 && key == SKEY_NO_SENSE) 2318 doprint = 0; 2319 #endif 2320 if (key == SKEY_BLANK_CHECK) { 2321 /* 2322 * This quirk code helps the drive read the 2323 * first tape block, regardless of format. That 2324 * is required for these drives to return proper 2325 * MODE SENSE information. 2326 */ 2327 if ((st->quirks & ST_Q_SENSE_HELP) && 2328 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 2329 /* still starting */ 2330 st->blksize -= 512; 2331 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 2332 st->flags |= ST_BLANK_READ; 2333 xs->resid = xs->datalen; 2334 if (bp) { 2335 bp->b_resid = xs->resid; 2336 /* return an EOF */ 2337 } 2338 retval = 0; 2339 /* lost position */ 2340 st->fileno = st->blkno = -1; 2341 } 2342 } 2343 2344 /* 2345 * If generic sense processing will continue, we should not 2346 * print sense info here. 2347 */ 2348 if (retval == EJUSTRETURN) 2349 doprint = 0; 2350 2351 if (doprint) { 2352 #ifdef SCSIVERBOSE 2353 scsipi_print_sense(xs, 0); 2354 #else 2355 scsipi_printaddr(periph); 2356 printf("Sense Key 0x%02x", key); 2357 if ((sense->error_code & SSD_ERRCODE_VALID) != 0) { 2358 switch (key) { 2359 case SKEY_NOT_READY: 2360 case SKEY_ILLEGAL_REQUEST: 2361 case SKEY_UNIT_ATTENTION: 2362 case SKEY_WRITE_PROTECT: 2363 break; 2364 case SKEY_VOLUME_OVERFLOW: 2365 case SKEY_BLANK_CHECK: 2366 printf(", requested size: %d (decimal)", info); 2367 break; 2368 case SKEY_ABORTED_COMMAND: 2369 if (xs->xs_retries) 2370 printf(", retrying"); 2371 printf(", cmd 0x%x, info 0x%x", 2372 xs->cmd->opcode, info); 2373 break; 2374 default: 2375 printf(", info = %d (decimal)", info); 2376 } 2377 } 2378 if (sense->extra_len != 0) { 2379 int n; 2380 printf(", data ="); 2381 for (n = 0; n < sense->extra_len; n++) 2382 printf(" %02x", sense->cmd_spec_info[n]); 2383 } 2384 printf("\n"); 2385 #endif 2386 } 2387 return (retval); 2388 } 2389 2390 /* 2391 * The quirk here is that the drive returns some value to st_mode_sense 2392 * incorrectly until the tape has actually passed by the head. 2393 * 2394 * The method is to set the drive to large fixed-block state (user-specified 2395 * density and 1024-byte blocks), then read and rewind to get it to sense the 2396 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 2397 * work, as a last resort, try variable- length blocks. The result will be 2398 * the ability to do an accurate st_mode_sense. 2399 * 2400 * We know we can do a rewind because we just did a load, which implies rewind. 2401 * Rewind seems preferable to space backward if we have a virgin tape. 2402 * 2403 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 2404 * error processing, both part of st_interpret_sense. 2405 */ 2406 int 2407 st_touch_tape(st) 2408 struct st_softc *st; 2409 { 2410 char *buf; 2411 int readsize; 2412 int error; 2413 2414 buf = malloc(1024, M_TEMP, M_NOWAIT); 2415 if (buf == NULL) 2416 return (ENOMEM); 2417 2418 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 2419 goto bad; 2420 2421 /* 2422 * If the block size is already known from the 2423 * sense data, use it. Else start probing at 1024. 2424 */ 2425 if (st->media_blksize > 0) 2426 st->blksize = st->media_blksize; 2427 else 2428 st->blksize = 1024; 2429 2430 do { 2431 switch (st->blksize) { 2432 case 512: 2433 case 1024: 2434 readsize = st->blksize; 2435 st->flags |= ST_FIXEDBLOCKS; 2436 break; 2437 default: 2438 readsize = 1; 2439 st->flags &= ~ST_FIXEDBLOCKS; 2440 } 2441 if ((error = st->ops(st, ST_OPS_MODESELECT, XS_CTL_SILENT)) 2442 != 0) { 2443 /* 2444 * The device did not agree with the proposed 2445 * block size. If we exhausted our options, 2446 * return failure, else try another. 2447 */ 2448 if (readsize == 1) 2449 goto bad; 2450 st->blksize -= 512; 2451 continue; 2452 } 2453 st_read(st, buf, readsize, XS_CTL_SILENT); /* XXX */ 2454 if ((error = st_rewind(st, 0, 0)) != 0) { 2455 bad: free(buf, M_TEMP); 2456 return (error); 2457 } 2458 } while (readsize != 1 && readsize > st->blksize); 2459 2460 free(buf, M_TEMP); 2461 return (0); 2462 } 2463 2464 int 2465 stdump(dev, blkno, va, size) 2466 dev_t dev; 2467 daddr_t blkno; 2468 caddr_t va; 2469 size_t size; 2470 { 2471 2472 /* Not implemented. */ 2473 return (ENXIO); 2474 }
Cache object: c9b74d1732a947b2066e3f9ee18242fa
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