st.c revision 1.163.2.3
1 /* $NetBSD: st.c,v 1.163.2.3 2004/09/03 12:45:39 skrll Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Charles M. Hannum. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Originally written by Julian Elischer (julian (at) tfs.com) 41 * for TRW Financial Systems for use under the MACH(2.5) operating system. 42 * 43 * TRW Financial Systems, in accordance with their agreement with Carnegie 44 * Mellon University, makes this software available to CMU to distribute 45 * or use in any manner that they see fit as long as this message is kept with 46 * the software. For this reason TFS also grants any other persons or 47 * organisations permission to use or modify this software. 48 * 49 * TFS supplies this software to be publicly redistributed 50 * on the understanding that TFS is not responsible for the correct 51 * functioning of this software in any circumstances. 52 * 53 * Ported to run under 386BSD by Julian Elischer (julian (at) tfs.com) Sept 1992 54 * major changes by Julian Elischer (julian (at) jules.dialix.oz.au) May 1993 55 * 56 * A lot of rewhacking done by mjacob (mjacob (at) nas.nasa.gov). 57 */ 58 59 #include <sys/cdefs.h> 60 __KERNEL_RCSID(0, "$NetBSD: st.c,v 1.163.2.3 2004/09/03 12:45:39 skrll 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/proc.h> 72 #include <sys/user.h> 73 #include <sys/mtio.h> 74 #include <sys/device.h> 75 #include <sys/conf.h> 76 #include <sys/kernel.h> 77 #include <sys/vnode.h> 78 79 #include <dev/scsipi/scsi_all.h> 80 #include <dev/scsipi/scsi_tape.h> 81 #include <dev/scsipi/stvar.h> 82 83 /* Defines for device specific stuff */ 84 #define DEF_FIXED_BSIZE 512 85 86 #define STMODE(z) ( minor(z) & 0x03) 87 #define STDSTY(z) ((minor(z) >> 2) & 0x03) 88 #define STUNIT(z) ((minor(z) >> 4) ) 89 #define STNMINOR 16 90 91 #define NORMAL_MODE 0 92 #define NOREW_MODE 1 93 #define EJECT_MODE 2 94 #define CTRL_MODE 3 95 96 #define FALSE 0 97 #define TRUE 1 98 99 #ifndef ST_MOUNT_DELAY 100 #define ST_MOUNT_DELAY 0 101 #endif 102 103 static dev_type_open(stopen); 104 static dev_type_close(stclose); 105 static dev_type_read(stread); 106 static dev_type_write(stwrite); 107 static dev_type_ioctl(stioctl); 108 static dev_type_strategy(ststrategy); 109 static 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 static 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 static void st_identify_drive(struct st_softc *, 318 struct scsipi_inquiry_pattern *); 319 static void st_loadquirks(struct st_softc *); 320 static int st_mount_tape(dev_t, int); 321 static void st_unmount(struct st_softc *, boolean); 322 static int st_decide_mode(struct st_softc *, boolean); 323 static void ststart(struct scsipi_periph *); 324 static void strestart(void *); 325 static void stdone(struct scsipi_xfer *); 326 static int st_read(struct st_softc *, char *, int, int); 327 static int st_space(struct st_softc *, int, u_int, int); 328 static int st_write_filemarks(struct st_softc *, int, int); 329 static int st_check_eod(struct st_softc *, boolean, int *, int); 330 static int st_load(struct st_softc *, u_int, int); 331 static int st_rewind(struct st_softc *, u_int, int); 332 static int st_interpret_sense(struct scsipi_xfer *); 333 static int st_touch_tape(struct st_softc *); 334 static int st_erase(struct st_softc *, int full, int flags); 335 static int st_rdpos(struct st_softc *, int, u_int32_t *); 336 static int st_setpos(struct st_softc *, int, u_int32_t *); 337 338 static 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(struct device *parent, struct st_softc *st, void *aux) 357 { 358 struct scsipibus_attach_args *sa = aux; 359 struct scsipi_periph *periph = sa->sa_periph; 360 361 SC_DEBUG(periph, SCSIPI_DB2, ("stattach: ")); 362 363 /* 364 * Store information needed to contact our base driver 365 */ 366 st->sc_periph = periph; 367 periph->periph_dev = &st->sc_dev; 368 periph->periph_switch = &st_switch; 369 370 /* 371 * Set initial flags 372 */ 373 374 st->flags = ST_INIT_FLAGS; 375 376 /* 377 * Set up the buf queue for this device 378 */ 379 bufq_alloc(&st->buf_queue, BUFQ_FCFS); 380 381 callout_init(&st->sc_callout); 382 383 /* 384 * Check if the drive is a known criminal and take 385 * Any steps needed to bring it into line 386 */ 387 st_identify_drive(st, &sa->sa_inqbuf); 388 /* 389 * Use the subdriver to request information regarding the drive. 390 */ 391 printf("\n"); 392 printf("%s: %s", st->sc_dev.dv_xname, st->quirkdata ? "rogue, " : ""); 393 if (scsipi_test_unit_ready(periph, 394 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE) || 395 st->ops(st, ST_OPS_MODESENSE, 396 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE)) 397 printf("drive empty\n"); 398 else { 399 printf("density code %d, ", st->media_density); 400 if (st->media_blksize > 0) 401 printf("%d-byte", st->media_blksize); 402 else 403 printf("variable"); 404 printf(" blocks, write-%s\n", 405 (st->flags & ST_READONLY) ? "protected" : "enabled"); 406 } 407 408 #if NRND > 0 409 rnd_attach_source(&st->rnd_source, st->sc_dev.dv_xname, 410 RND_TYPE_TAPE, 0); 411 #endif 412 } 413 414 int 415 stactivate(struct device *self, enum devact act) 416 { 417 int rv = 0; 418 419 switch (act) { 420 case DVACT_ACTIVATE: 421 rv = EOPNOTSUPP; 422 break; 423 424 case DVACT_DEACTIVATE: 425 /* 426 * Nothing to do; we key off the device's DVF_ACTIVE. 427 */ 428 break; 429 } 430 return (rv); 431 } 432 433 int 434 stdetach(struct device *self, int flags) 435 { 436 struct st_softc *st = (struct st_softc *)self; 437 struct buf *bp; 438 int s, bmaj, cmaj, mn; 439 440 /* locate the major number */ 441 bmaj = bdevsw_lookup_major(&st_bdevsw); 442 cmaj = cdevsw_lookup_major(&st_cdevsw); 443 444 /* kill any pending restart */ 445 callout_stop(&st->sc_callout); 446 447 s = splbio(); 448 449 /* Kill off any queued buffers. */ 450 while ((bp = BUFQ_GET(&st->buf_queue)) != NULL) { 451 bp->b_error = EIO; 452 bp->b_flags |= B_ERROR; 453 bp->b_resid = bp->b_bcount; 454 biodone(bp); 455 } 456 457 bufq_free(&st->buf_queue); 458 459 /* Kill off any pending commands. */ 460 scsipi_kill_pending(st->sc_periph); 461 462 splx(s); 463 464 /* Nuke the vnodes for any open instances */ 465 mn = STUNIT(self->dv_unit); 466 vdevgone(bmaj, mn, mn+STNMINOR-1, VBLK); 467 vdevgone(cmaj, mn, mn+STNMINOR-1, VCHR); 468 469 470 #if NRND > 0 471 /* Unhook the entropy source. */ 472 rnd_detach_source(&st->rnd_source); 473 #endif 474 475 return (0); 476 } 477 478 /* 479 * Use the inquiry routine in 'scsi_base' to get drive info so we can 480 * Further tailor our behaviour. 481 */ 482 static void 483 st_identify_drive(struct st_softc *st, struct scsipi_inquiry_pattern *inqbuf) 484 { 485 struct st_quirk_inquiry_pattern *finger; 486 int priority; 487 488 finger = (struct st_quirk_inquiry_pattern *)scsipi_inqmatch(inqbuf, 489 (caddr_t)st_quirk_patterns, 490 sizeof(st_quirk_patterns) / sizeof(st_quirk_patterns[0]), 491 sizeof(st_quirk_patterns[0]), &priority); 492 if (priority != 0) { 493 st->quirkdata = &finger->quirkdata; 494 st->drive_quirks = finger->quirkdata.quirks; 495 st->quirks = finger->quirkdata.quirks; /* start value */ 496 st->page_0_size = finger->quirkdata.page_0_size; 497 st_loadquirks(st); 498 } 499 } 500 501 /* 502 * initialise the subdevices to the default (QUIRK) state. 503 * this will remove any setting made by the system operator or previous 504 * operations. 505 */ 506 static void 507 st_loadquirks(struct st_softc *st) 508 { 509 int i; 510 struct modes *mode; 511 struct modes *mode2; 512 513 mode = st->quirkdata->modes; 514 mode2 = st->modes; 515 for (i = 0; i < 4; i++) { 516 memset(mode2, 0, sizeof(struct modes)); 517 st->modeflags[i] &= ~(BLKSIZE_SET_BY_QUIRK | 518 DENSITY_SET_BY_QUIRK | BLKSIZE_SET_BY_USER | 519 DENSITY_SET_BY_USER); 520 if ((mode->quirks | st->drive_quirks) & ST_Q_FORCE_BLKSIZE) { 521 mode2->blksize = mode->blksize; 522 st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; 523 } 524 if (mode->density) { 525 mode2->density = mode->density; 526 st->modeflags[i] |= DENSITY_SET_BY_QUIRK; 527 } 528 mode2->quirks |= mode->quirks; 529 mode++; 530 mode2++; 531 } 532 } 533 534 /* 535 * open the device. 536 */ 537 static int 538 stopen(dev_t dev, int flags, int mode, struct lwp *l) 539 { 540 u_int stmode, dsty; 541 int error, sflags, unit, tries, ntries; 542 struct st_softc *st; 543 struct scsipi_periph *periph; 544 struct scsipi_adapter *adapt; 545 546 unit = STUNIT(dev); 547 if (unit >= st_cd.cd_ndevs) 548 return (ENXIO); 549 st = st_cd.cd_devs[unit]; 550 if (st == NULL) 551 return (ENXIO); 552 553 stmode = STMODE(dev); 554 dsty = STDSTY(dev); 555 556 periph = st->sc_periph; 557 adapt = periph->periph_channel->chan_adapter; 558 559 SC_DEBUG(periph, SCSIPI_DB1, ("open: dev=0x%x (unit %d (of %d))\n", dev, 560 unit, st_cd.cd_ndevs)); 561 562 563 /* 564 * Only allow one at a time 565 */ 566 if (periph->periph_flags & PERIPH_OPEN) { 567 printf("%s: already open\n", st->sc_dev.dv_xname); 568 return (EBUSY); 569 } 570 571 if ((error = scsipi_adapter_addref(adapt)) != 0) 572 return (error); 573 574 /* 575 * clear any latched errors. 576 */ 577 st->mt_resid = 0; 578 st->mt_erreg = 0; 579 st->asc = 0; 580 st->ascq = 0; 581 582 /* 583 * Catch any unit attention errors. Be silent about this 584 * unless we're already mounted. We ignore media change 585 * if we're in control mode or not mounted yet. 586 */ 587 if ((st->flags & ST_MOUNTED) == 0 || stmode == CTRL_MODE) { 588 #ifdef SCSIDEBUG 589 sflags = XS_CTL_IGNORE_MEDIA_CHANGE; 590 #else 591 sflags = XS_CTL_SILENT|XS_CTL_IGNORE_MEDIA_CHANGE; 592 #endif 593 } else 594 sflags = 0; 595 596 /* 597 * If we're already mounted or we aren't configured for 598 * a mount delay, only try a test unit ready once. Otherwise, 599 * try up to ST_MOUNT_DELAY times with a rest interval of 600 * one second between each try. 601 */ 602 603 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0) { 604 ntries = 1; 605 } else { 606 ntries = ST_MOUNT_DELAY; 607 } 608 609 for (error = tries = 0; tries < ntries; tries++) { 610 int slpintr, oflags; 611 612 /* 613 * If we had no error, or we're opening the control mode 614 * device, we jump out right away. 615 */ 616 617 error = scsipi_test_unit_ready(periph, sflags); 618 if (error == 0 || stmode == CTRL_MODE) { 619 break; 620 } 621 622 /* 623 * We had an error. 624 * 625 * If we're already mounted or we aren't configured for 626 * a mount delay, or the error isn't a NOT READY error, 627 * skip to the error exit now. 628 */ 629 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0 || 630 (st->mt_key != SKEY_NOT_READY)) { 631 goto bad; 632 } 633 634 /* 635 * clear any latched errors. 636 */ 637 st->mt_resid = 0; 638 st->mt_erreg = 0; 639 st->asc = 0; 640 st->ascq = 0; 641 642 /* 643 * Fake that we have the device open so 644 * we block other apps from getting in. 645 */ 646 647 oflags = periph->periph_flags; 648 periph->periph_flags |= PERIPH_OPEN; 649 650 slpintr = tsleep(&lbolt, PUSER|PCATCH, "stload", 0); 651 652 periph->periph_flags = oflags; /* restore flags */ 653 if (slpintr) { 654 goto bad; 655 } 656 } 657 658 659 /* 660 * If the mode is 3 (e.g. minor = 3,7,11,15) then the device has 661 * been opened to set defaults and perform other, usually non-I/O 662 * related, operations. In this case, do a quick check to see 663 * whether the unit actually had a tape loaded (this will be known 664 * as to whether or not we got a NOT READY for the above 665 * unit attention). If a tape is there, go do a mount sequence. 666 */ 667 if (stmode == CTRL_MODE && st->mt_key == SKEY_NOT_READY) { 668 periph->periph_flags |= PERIPH_OPEN; 669 return (0); 670 } 671 672 /* 673 * If we get this far and had an error set, that means we failed 674 * to pass the 'test unit ready' test for the non-controlmode device, 675 * so we bounce the open. 676 */ 677 678 if (error) 679 return (error); 680 681 /* 682 * Else, we're now committed to saying we're open. 683 */ 684 685 periph->periph_flags |= PERIPH_OPEN; /* unit attn are now errors */ 686 687 /* 688 * If it's a different mode, or if the media has been 689 * invalidated, unmount the tape from the previous 690 * session but continue with open processing 691 */ 692 if (st->last_dsty != dsty || 693 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 694 st_unmount(st, NOEJECT); 695 696 /* 697 * If we are not mounted, then we should start a new 698 * mount session. 699 */ 700 if (!(st->flags & ST_MOUNTED)) { 701 if ((error = st_mount_tape(dev, flags)) != 0) 702 goto bad; 703 st->last_dsty = dsty; 704 } 705 if (!(st->quirks & ST_Q_NOPREVENT)) { 706 scsipi_prevent(periph, PR_PREVENT, 707 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 708 } 709 710 SC_DEBUG(periph, SCSIPI_DB2, ("open complete\n")); 711 return (0); 712 713 bad: 714 st_unmount(st, NOEJECT); 715 scsipi_adapter_delref(adapt); 716 periph->periph_flags &= ~PERIPH_OPEN; 717 return (error); 718 } 719 720 /* 721 * close the device.. only called if we are the LAST 722 * occurence of an open device 723 */ 724 static int 725 stclose(dev_t dev, int flags, int mode, struct lwp *l) 726 { 727 int stxx, error = 0; 728 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 729 struct scsipi_periph *periph = st->sc_periph; 730 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 731 732 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("closing\n")); 733 734 /* 735 * Make sure that a tape opened in write-only mode will have 736 * file marks written on it when closed, even if not written to. 737 * 738 * This is for SUN compatibility. Actually, the Sun way of 739 * things is to: 740 * 741 * only write filemarks if there are fmks to be written and 742 * - open for write (possibly read/write) 743 * - the last operation was a write 744 * or: 745 * - opened for wronly 746 * - no data was written (including filemarks) 747 */ 748 749 stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); 750 if (((flags & FWRITE) && stxx == ST_WRITTEN) || 751 ((flags & O_ACCMODE) == FWRITE && stxx == 0)) { 752 int nm; 753 error = st_check_eod(st, FALSE, &nm, 0); 754 } 755 756 /* 757 * Allow robots to eject tape if needed. 758 */ 759 scsipi_prevent(periph, PR_ALLOW, 760 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 761 762 switch (STMODE(dev)) { 763 case NORMAL_MODE: 764 st_unmount(st, NOEJECT); 765 break; 766 case NOREW_MODE: 767 case CTRL_MODE: 768 /* 769 * Leave mounted unless media seems to have been removed. 770 * 771 * Otherwise, if we're to terminate a tape with more than one 772 * filemark [ and because we're not rewinding here ], backspace 773 * one filemark so that later appends will see an unbroken 774 * sequence of: 775 * 776 * file - FMK - file - FMK ... file - FMK FMK (EOM) 777 */ 778 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 779 st_unmount(st, NOEJECT); 780 } else if (error == 0) { 781 /* 782 * ST_WRITTEN was preserved from above. 783 * 784 * All we need to know here is: 785 * 786 * Were we writing this tape and was the last 787 * operation a write? 788 * 789 * Are there supposed to be 2FM at EOD? 790 * 791 * If both statements are true, then we backspace 792 * one filemark. 793 */ 794 stxx |= (st->flags & ST_2FM_AT_EOD); 795 if ((flags & FWRITE) != 0 && 796 (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { 797 error = st_space(st, -1, SP_FILEMARKS, 0); 798 } 799 } 800 break; 801 case EJECT_MODE: 802 st_unmount(st, EJECT); 803 break; 804 } 805 806 scsipi_wait_drain(periph); 807 808 scsipi_adapter_delref(adapt); 809 periph->periph_flags &= ~PERIPH_OPEN; 810 811 return (error); 812 } 813 814 /* 815 * Start a new mount session. 816 * Copy in all the default parameters from the selected device mode. 817 * and try guess any that seem to be defaulted. 818 */ 819 static int 820 st_mount_tape(dev_t dev, int flags) 821 { 822 int unit; 823 u_int dsty; 824 struct st_softc *st; 825 struct scsipi_periph *periph; 826 int error = 0; 827 828 unit = STUNIT(dev); 829 dsty = STDSTY(dev); 830 st = st_cd.cd_devs[unit]; 831 periph = st->sc_periph; 832 833 if (st->flags & ST_MOUNTED) 834 return (0); 835 836 SC_DEBUG(periph, SCSIPI_DB1, ("mounting\n ")); 837 st->flags |= ST_NEW_MOUNT; 838 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 839 /* 840 * If the media is new, then make sure we give it a chance to 841 * to do a 'load' instruction. (We assume it is new.) 842 */ 843 if ((error = st_load(st, LD_LOAD, XS_CTL_SILENT)) != 0) 844 return (error); 845 /* 846 * Throw another dummy instruction to catch 847 * 'Unit attention' errors. Many drives give 848 * these after doing a Load instruction (with 849 * the MEDIUM MAY HAVE CHANGED asc/ascq). 850 */ 851 scsipi_test_unit_ready(periph, XS_CTL_SILENT); /* XXX */ 852 853 /* 854 * Some devices can't tell you much until they have been 855 * asked to look at the media. This quirk does this. 856 */ 857 if (st->quirks & ST_Q_SENSE_HELP) 858 if ((error = st_touch_tape(st)) != 0) 859 return (error); 860 /* 861 * Load the physical device parameters 862 * loads: blkmin, blkmax 863 */ 864 if ((error = st->ops(st, ST_OPS_RBL, 0)) != 0) 865 return (error); 866 /* 867 * Load the media dependent parameters 868 * includes: media_blksize,media_density,numblks 869 * As we have a tape in, it should be reflected here. 870 * If not you may need the "quirk" above. 871 */ 872 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 873 return (error); 874 /* 875 * If we have gained a permanent density from somewhere, 876 * then use it in preference to the one supplied by 877 * default by the driver. 878 */ 879 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 880 st->density = st->modes[dsty].density; 881 else 882 st->density = st->media_density; 883 /* 884 * If we have gained a permanent blocksize 885 * then use it in preference to the one supplied by 886 * default by the driver. 887 */ 888 st->flags &= ~ST_FIXEDBLOCKS; 889 if (st->modeflags[dsty] & 890 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 891 st->blksize = st->modes[dsty].blksize; 892 if (st->blksize) 893 st->flags |= ST_FIXEDBLOCKS; 894 } else { 895 if ((error = st_decide_mode(st, FALSE)) != 0) 896 return (error); 897 } 898 if ((error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 899 /* ATAPI will return ENODEV for this, and this may be OK */ 900 if (error != ENODEV) { 901 printf("%s: cannot set selected mode\n", 902 st->sc_dev.dv_xname); 903 return (error); 904 } 905 } 906 st->flags &= ~ST_NEW_MOUNT; 907 st->flags |= ST_MOUNTED; 908 periph->periph_flags |= PERIPH_MEDIA_LOADED; /* move earlier? */ 909 st->blkno = st->fileno = (daddr_t) 0; 910 return (0); 911 } 912 913 /* 914 * End the present mount session. 915 * Rewind, and optionally eject the tape. 916 * Reset various flags to indicate that all new 917 * operations require another mount operation 918 */ 919 static void 920 st_unmount(struct st_softc *st, boolean eject) 921 { 922 struct scsipi_periph *periph = st->sc_periph; 923 int nmarks; 924 925 if ((st->flags & ST_MOUNTED) == 0) 926 return; 927 SC_DEBUG(periph, SCSIPI_DB1, ("unmounting\n")); 928 st_check_eod(st, FALSE, &nmarks, XS_CTL_IGNORE_NOT_READY); 929 st_rewind(st, 0, XS_CTL_IGNORE_NOT_READY); 930 931 /* 932 * Section 9.3.3 of the SCSI specs states that a device shall return 933 * the density value specified in the last succesfull MODE SELECT 934 * after an unload operation, in case it is not able to 935 * automatically determine the density of the new medium. 936 * 937 * So we instruct the device to use the default density, which will 938 * prevent the use of stale density values (in particular, 939 * in st_touch_tape(). 940 */ 941 st->density = 0; 942 if (st->ops(st, ST_OPS_MODESELECT, 0) != 0) { 943 printf("%s: WARNING: cannot revert to default density\n", 944 st->sc_dev.dv_xname); 945 } 946 947 if (eject) { 948 if (!(st->quirks & ST_Q_NOPREVENT)) { 949 scsipi_prevent(periph, PR_ALLOW, 950 XS_CTL_IGNORE_ILLEGAL_REQUEST | 951 XS_CTL_IGNORE_NOT_READY); 952 } 953 st_load(st, LD_UNLOAD, XS_CTL_IGNORE_NOT_READY); 954 st->blkno = st->fileno = (daddr_t) -1; 955 } else { 956 st->blkno = st->fileno = (daddr_t) 0; 957 } 958 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 959 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 960 } 961 962 /* 963 * Given all we know about the device, media, mode, 'quirks' and 964 * initial operation, make a decision as to how we should be set 965 * to run (regarding blocking and EOD marks) 966 */ 967 int 968 st_decide_mode(struct st_softc *st, boolean first_read) 969 { 970 971 SC_DEBUG(st->sc_periph, SCSIPI_DB2, ("starting block mode decision\n")); 972 973 /* 974 * If the drive can only handle fixed-length blocks and only at 975 * one size, perhaps we should just do that. 976 */ 977 if (st->blkmin && (st->blkmin == st->blkmax)) { 978 st->flags |= ST_FIXEDBLOCKS; 979 st->blksize = st->blkmin; 980 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 981 ("blkmin == blkmax of %d\n", st->blkmin)); 982 goto done; 983 } 984 /* 985 * If the tape density mandates (or even suggests) use of fixed 986 * or variable-length blocks, comply. 987 */ 988 switch (st->density) { 989 case HALFINCH_800: 990 case HALFINCH_1600: 991 case HALFINCH_6250: 992 case DDS: 993 st->flags &= ~ST_FIXEDBLOCKS; 994 st->blksize = 0; 995 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 996 ("density specified variable\n")); 997 goto done; 998 case QIC_11: 999 case QIC_24: 1000 case QIC_120: 1001 case QIC_150: 1002 case QIC_525: 1003 case QIC_1320: 1004 case QIC_3095: 1005 case QIC_3220: 1006 st->flags |= ST_FIXEDBLOCKS; 1007 if (st->media_blksize > 0) 1008 st->blksize = st->media_blksize; 1009 else 1010 st->blksize = DEF_FIXED_BSIZE; 1011 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1012 ("density specified fixed\n")); 1013 goto done; 1014 } 1015 /* 1016 * If we're about to read the tape, perhaps we should choose 1017 * fixed or variable-length blocks and block size according to 1018 * what the drive found on the tape. 1019 */ 1020 if (first_read && 1021 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 1022 (st->media_blksize == DEF_FIXED_BSIZE) || 1023 (st->media_blksize == 1024))) { 1024 if (st->media_blksize > 0) 1025 st->flags |= ST_FIXEDBLOCKS; 1026 else 1027 st->flags &= ~ST_FIXEDBLOCKS; 1028 st->blksize = st->media_blksize; 1029 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1030 ("Used media_blksize of %d\n", st->media_blksize)); 1031 goto done; 1032 } 1033 /* 1034 * We're getting no hints from any direction. Choose variable- 1035 * length blocks arbitrarily. 1036 */ 1037 st->flags &= ~ST_FIXEDBLOCKS; 1038 st->blksize = 0; 1039 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1040 ("Give up and default to variable mode\n")); 1041 1042 done: 1043 /* 1044 * Decide whether or not to write two file marks to signify end- 1045 * of-data. Make the decision as a function of density. If 1046 * the decision is not to use a second file mark, the SCSI BLANK 1047 * CHECK condition code will be recognized as end-of-data when 1048 * first read. 1049 * (I think this should be a by-product of fixed/variable..julian) 1050 */ 1051 switch (st->density) { 1052 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 1053 case QIC_11: 1054 case QIC_24: 1055 case QIC_120: 1056 case QIC_150: 1057 case QIC_525: 1058 case QIC_1320: 1059 case QIC_3095: 1060 case QIC_3220: 1061 st->flags &= ~ST_2FM_AT_EOD; 1062 break; 1063 default: 1064 st->flags |= ST_2FM_AT_EOD; 1065 } 1066 return (0); 1067 } 1068 1069 /* 1070 * Actually translate the requested transfer into 1071 * one the physical driver can understand 1072 * The transfer is described by a buf and will include 1073 * only one physical transfer. 1074 */ 1075 static void 1076 ststrategy(struct buf *bp) 1077 { 1078 struct st_softc *st = st_cd.cd_devs[STUNIT(bp->b_dev)]; 1079 int s; 1080 1081 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1082 ("ststrategy %ld bytes @ blk %" PRId64 "\n", bp->b_bcount, bp->b_blkno)); 1083 /* 1084 * If it's a null transfer, return immediatly 1085 */ 1086 if (bp->b_bcount == 0) 1087 goto done; 1088 1089 /* If offset is negative, error */ 1090 if (bp->b_blkno < 0) { 1091 bp->b_error = EINVAL; 1092 goto bad; 1093 } 1094 1095 /* 1096 * Odd sized request on fixed drives are verboten 1097 */ 1098 if (st->flags & ST_FIXEDBLOCKS) { 1099 if (bp->b_bcount % st->blksize) { 1100 printf("%s: bad request, must be multiple of %d\n", 1101 st->sc_dev.dv_xname, st->blksize); 1102 bp->b_error = EIO; 1103 goto bad; 1104 } 1105 } 1106 /* 1107 * as are out-of-range requests on variable drives. 1108 */ 1109 else if (bp->b_bcount < st->blkmin || 1110 (st->blkmax && bp->b_bcount > st->blkmax)) { 1111 printf("%s: bad request, must be between %d and %d\n", 1112 st->sc_dev.dv_xname, st->blkmin, st->blkmax); 1113 bp->b_error = EIO; 1114 goto bad; 1115 } 1116 s = splbio(); 1117 1118 /* 1119 * Place it in the queue of activities for this tape 1120 * at the end (a bit silly because we only have on user.. 1121 * (but it could fork())) 1122 */ 1123 BUFQ_PUT(&st->buf_queue, bp); 1124 1125 /* 1126 * Tell the device to get going on the transfer if it's 1127 * not doing anything, otherwise just wait for completion 1128 * (All a bit silly if we're only allowing 1 open but..) 1129 */ 1130 ststart(st->sc_periph); 1131 1132 splx(s); 1133 return; 1134 bad: 1135 bp->b_flags |= B_ERROR; 1136 done: 1137 /* 1138 * Correctly set the buf to indicate a completed xfer 1139 */ 1140 bp->b_resid = bp->b_bcount; 1141 biodone(bp); 1142 return; 1143 } 1144 1145 /* 1146 * ststart looks to see if there is a buf waiting for the device 1147 * and that the device is not already busy. If both are true, 1148 * It dequeues the buf and creates a scsi command to perform the 1149 * transfer required. The transfer request will call scsipi_done 1150 * on completion, which will in turn call this routine again 1151 * so that the next queued transfer is performed. 1152 * The bufs are queued by the strategy routine (ststrategy) 1153 * 1154 * This routine is also called after other non-queued requests 1155 * have been made of the scsi driver, to ensure that the queue 1156 * continues to be drained. 1157 * ststart() is called at splbio 1158 */ 1159 static void 1160 ststart(struct scsipi_periph *periph) 1161 { 1162 struct st_softc *st = (void *)periph->periph_dev; 1163 struct buf *bp; 1164 struct scsi_rw_tape cmd; 1165 int flags, error; 1166 1167 SC_DEBUG(periph, SCSIPI_DB2, ("ststart ")); 1168 /* 1169 * See if there is a buf to do and we are not already 1170 * doing one 1171 */ 1172 while (periph->periph_active < periph->periph_openings) { 1173 /* if a special awaits, let it proceed first */ 1174 if (periph->periph_flags & PERIPH_WAITING) { 1175 periph->periph_flags &= ~PERIPH_WAITING; 1176 wakeup((caddr_t)periph); 1177 return; 1178 } 1179 1180 /* 1181 * If the device has been unmounted by the user 1182 * then throw away all requests until done. 1183 */ 1184 if (__predict_false((st->flags & ST_MOUNTED) == 0 || 1185 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0)) { 1186 if ((bp = BUFQ_GET(&st->buf_queue)) != NULL) { 1187 /* make sure that one implies the other.. */ 1188 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 1189 bp->b_flags |= B_ERROR; 1190 bp->b_error = EIO; 1191 bp->b_resid = bp->b_bcount; 1192 biodone(bp); 1193 continue; 1194 } else { 1195 return; 1196 } 1197 } 1198 1199 if ((bp = BUFQ_PEEK(&st->buf_queue)) == NULL) 1200 return; 1201 1202 /* 1203 * only FIXEDBLOCK devices have pending I/O or space operations. 1204 */ 1205 if (st->flags & ST_FIXEDBLOCKS) { 1206 /* 1207 * If we are at a filemark but have not reported it yet 1208 * then we should report it now 1209 */ 1210 if (st->flags & ST_AT_FILEMARK) { 1211 if ((bp->b_flags & B_READ) == B_WRITE) { 1212 /* 1213 * Handling of ST_AT_FILEMARK in 1214 * st_space will fill in the right file 1215 * mark count. 1216 * Back up over filemark 1217 */ 1218 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1219 BUFQ_GET(&st->buf_queue); 1220 bp->b_flags |= B_ERROR; 1221 bp->b_error = EIO; 1222 biodone(bp); 1223 continue; 1224 } 1225 } else { 1226 BUFQ_GET(&st->buf_queue); 1227 bp->b_resid = bp->b_bcount; 1228 bp->b_error = 0; 1229 bp->b_flags &= ~B_ERROR; 1230 st->flags &= ~ST_AT_FILEMARK; 1231 biodone(bp); 1232 continue; /* seek more work */ 1233 } 1234 } 1235 } 1236 /* 1237 * If we are at EOM but have not reported it 1238 * yet then we should report it now. 1239 */ 1240 if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { 1241 BUFQ_GET(&st->buf_queue); 1242 bp->b_resid = bp->b_bcount; 1243 if (st->flags & ST_EIO_PENDING) { 1244 bp->b_error = EIO; 1245 bp->b_flags |= B_ERROR; 1246 } 1247 st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); 1248 biodone(bp); 1249 continue; /* seek more work */ 1250 } 1251 1252 /* 1253 * Fill out the scsi command 1254 */ 1255 memset(&cmd, 0, sizeof(cmd)); 1256 flags = XS_CTL_NOSLEEP | XS_CTL_ASYNC; 1257 if ((bp->b_flags & B_READ) == B_WRITE) { 1258 cmd.opcode = WRITE; 1259 st->flags &= ~ST_FM_WRITTEN; 1260 flags |= XS_CTL_DATA_OUT; 1261 } else { 1262 cmd.opcode = READ; 1263 flags |= XS_CTL_DATA_IN; 1264 } 1265 1266 /* 1267 * Handle "fixed-block-mode" tape drives by using the 1268 * block count instead of the length. 1269 */ 1270 if (st->flags & ST_FIXEDBLOCKS) { 1271 cmd.byte2 |= SRW_FIXED; 1272 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1273 } else 1274 _lto3b(bp->b_bcount, cmd.len); 1275 1276 /* 1277 * Clear 'position updated' indicator 1278 */ 1279 st->flags &= ~ST_POSUPDATED; 1280 1281 /* 1282 * go ask the adapter to do all this for us 1283 */ 1284 error = scsipi_command(periph, 1285 (struct scsipi_generic *)&cmd, sizeof(cmd), 1286 (u_char *)bp->b_data, bp->b_bcount, 1287 0, ST_IO_TIME, bp, flags); 1288 if (__predict_false(error)) { 1289 printf("%s: not queued, error %d\n", 1290 st->sc_dev.dv_xname, error); 1291 } 1292 if (__predict_false(error == ENOMEM)) { 1293 /* 1294 * out of memory. Keep this buffer in the queue, and 1295 * retry later. 1296 */ 1297 callout_reset(&st->sc_callout, hz / 2, strestart, 1298 periph); 1299 return; 1300 } 1301 #ifdef DIAGNOSTIC 1302 if (BUFQ_GET(&st->buf_queue) != bp) 1303 panic("ststart(): dequeued wrong buf"); 1304 #else 1305 BUFQ_GET(&st->buf_queue); 1306 #endif 1307 } /* go back and see if we can cram more work in.. */ 1308 } 1309 1310 static void 1311 strestart(void *v) 1312 { 1313 int s = splbio(); 1314 ststart((struct scsipi_periph *)v); 1315 splx(s); 1316 } 1317 1318 1319 static void 1320 stdone(struct scsipi_xfer *xs) 1321 { 1322 struct st_softc *st = (void *)xs->xs_periph->periph_dev; 1323 1324 if (xs->bp != NULL) { 1325 if ((xs->bp->b_flags & B_READ) == B_WRITE) { 1326 st->flags |= ST_WRITTEN; 1327 } else { 1328 st->flags &= ~ST_WRITTEN; 1329 } 1330 #if NRND > 0 1331 rnd_add_uint32(&st->rnd_source, xs->bp->b_blkno); 1332 #endif 1333 1334 if ((st->flags & ST_POSUPDATED) == 0) { 1335 if (xs->bp->b_flags & B_ERROR) { 1336 st->fileno = st->blkno = -1; 1337 } else if (st->blkno != -1) { 1338 if (st->flags & ST_FIXEDBLOCKS) { 1339 st->blkno += 1340 (xs->bp->b_bcount / st->blksize); 1341 } else { 1342 st->blkno++; 1343 } 1344 } 1345 } 1346 } 1347 } 1348 1349 static int 1350 stread(dev_t dev, struct uio *uio, int iomode) 1351 { 1352 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1353 1354 return (physio(ststrategy, NULL, dev, B_READ, 1355 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1356 } 1357 1358 static int 1359 stwrite(dev_t dev, struct uio *uio, int iomode) 1360 { 1361 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1362 1363 return (physio(ststrategy, NULL, dev, B_WRITE, 1364 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1365 } 1366 1367 /* 1368 * Perform special action on behalf of the user; 1369 * knows about the internals of this device 1370 */ 1371 static int 1372 stioctl(dev_t dev, u_long cmd, caddr_t arg, int flag, struct lwp *l) 1373 { 1374 int error = 0; 1375 int unit; 1376 int number, nmarks, dsty; 1377 int flags; 1378 struct st_softc *st; 1379 int hold_blksize; 1380 u_int8_t hold_density; 1381 struct mtop *mt = (struct mtop *) arg; 1382 1383 /* 1384 * Find the device that the user is talking about 1385 */ 1386 flags = 0; /* give error messages, act on errors etc. */ 1387 unit = STUNIT(dev); 1388 dsty = STDSTY(dev); 1389 st = st_cd.cd_devs[unit]; 1390 hold_blksize = st->blksize; 1391 hold_density = st->density; 1392 1393 switch ((u_int) cmd) { 1394 1395 case MTIOCGET: { 1396 struct mtget *g = (struct mtget *) arg; 1397 /* 1398 * (to get the current state of READONLY) 1399 */ 1400 error = st->ops(st, ST_OPS_MODESENSE, XS_CTL_SILENT); 1401 if (error) { 1402 /* 1403 * Ignore the error if in control mode; 1404 * this is mandated by st(4). 1405 */ 1406 if (STMODE(dev) != CTRL_MODE) 1407 break; 1408 error = 0; 1409 } 1410 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("[ioctl: get status]\n")); 1411 memset(g, 0, sizeof(struct mtget)); 1412 g->mt_type = 0x7; /* Ultrix compat *//*? */ 1413 g->mt_blksiz = st->blksize; 1414 g->mt_density = st->density; 1415 g->mt_mblksiz[0] = st->modes[0].blksize; 1416 g->mt_mblksiz[1] = st->modes[1].blksize; 1417 g->mt_mblksiz[2] = st->modes[2].blksize; 1418 g->mt_mblksiz[3] = st->modes[3].blksize; 1419 g->mt_mdensity[0] = st->modes[0].density; 1420 g->mt_mdensity[1] = st->modes[1].density; 1421 g->mt_mdensity[2] = st->modes[2].density; 1422 g->mt_mdensity[3] = st->modes[3].density; 1423 g->mt_fileno = st->fileno; 1424 g->mt_blkno = st->blkno; 1425 if (st->flags & ST_READONLY) 1426 g->mt_dsreg |= MT_DS_RDONLY; 1427 if (st->flags & ST_MOUNTED) 1428 g->mt_dsreg |= MT_DS_MOUNTED; 1429 g->mt_resid = st->mt_resid; 1430 g->mt_erreg = st->mt_erreg; 1431 /* 1432 * clear latched errors. 1433 */ 1434 st->mt_resid = 0; 1435 st->mt_erreg = 0; 1436 st->asc = 0; 1437 st->ascq = 0; 1438 break; 1439 } 1440 case MTIOCTOP: { 1441 1442 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1443 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1444 mt->mt_count)); 1445 1446 /* compat: in U*x it is a short */ 1447 number = mt->mt_count; 1448 switch ((short) (mt->mt_op)) { 1449 case MTWEOF: /* write an end-of-file record */ 1450 error = st_write_filemarks(st, number, flags); 1451 break; 1452 case MTBSF: /* backward space file */ 1453 number = -number; 1454 case MTFSF: /* forward space file */ 1455 error = st_check_eod(st, FALSE, &nmarks, flags); 1456 if (!error) 1457 error = st_space(st, number - nmarks, 1458 SP_FILEMARKS, flags); 1459 break; 1460 case MTBSR: /* backward space record */ 1461 number = -number; 1462 case MTFSR: /* forward space record */ 1463 error = st_check_eod(st, TRUE, &nmarks, flags); 1464 if (!error) 1465 error = st_space(st, number, SP_BLKS, flags); 1466 break; 1467 case MTREW: /* rewind */ 1468 error = st_rewind(st, 0, flags); 1469 break; 1470 case MTOFFL: /* rewind and put the drive offline */ 1471 st_unmount(st, EJECT); 1472 break; 1473 case MTNOP: /* no operation, sets status only */ 1474 break; 1475 case MTRETEN: /* retension the tape */ 1476 error = st_load(st, LD_RETENSION, flags); 1477 if (!error) 1478 error = st_load(st, LD_LOAD, flags); 1479 break; 1480 case MTEOM: /* forward space to end of media */ 1481 error = st_check_eod(st, FALSE, &nmarks, flags); 1482 if (!error) 1483 error = st_space(st, 1, SP_EOM, flags); 1484 break; 1485 case MTCACHE: /* enable controller cache */ 1486 st->flags &= ~ST_DONTBUFFER; 1487 goto try_new_value; 1488 case MTNOCACHE: /* disable controller cache */ 1489 st->flags |= ST_DONTBUFFER; 1490 goto try_new_value; 1491 case MTERASE: /* erase volume */ 1492 error = st_erase(st, number, flags); 1493 break; 1494 case MTSETBSIZ: /* Set block size for device */ 1495 #ifdef NOTYET 1496 if (!(st->flags & ST_NEW_MOUNT)) { 1497 uprintf("re-mount tape before changing blocksize"); 1498 error = EINVAL; 1499 break; 1500 } 1501 #endif 1502 if (number == 0) 1503 st->flags &= ~ST_FIXEDBLOCKS; 1504 else { 1505 if ((st->blkmin || st->blkmax) && 1506 (number < st->blkmin || 1507 number > st->blkmax)) { 1508 error = EINVAL; 1509 break; 1510 } 1511 st->flags |= ST_FIXEDBLOCKS; 1512 } 1513 st->blksize = number; 1514 st->flags |= ST_BLOCK_SET; /*XXX */ 1515 goto try_new_value; 1516 1517 case MTSETDNSTY: /* Set density for device and mode */ 1518 /* 1519 * Any number >= 0 and <= 0xff is legal. Numbers 1520 * above 0x80 are 'vendor unique'. 1521 */ 1522 if (number < 0 || number > 255) { 1523 error = EINVAL; 1524 break; 1525 } else 1526 st->density = number; 1527 goto try_new_value; 1528 1529 case MTCMPRESS: 1530 error = st->ops(st, (number == 0) ? 1531 ST_OPS_CMPRSS_OFF : ST_OPS_CMPRSS_ON, 1532 XS_CTL_SILENT); 1533 break; 1534 1535 case MTEWARN: 1536 if (number) 1537 st->flags |= ST_EARLYWARN; 1538 else 1539 st->flags &= ~ST_EARLYWARN; 1540 break; 1541 1542 default: 1543 error = EINVAL; 1544 } 1545 break; 1546 } 1547 case MTIOCIEOT: 1548 case MTIOCEEOT: 1549 break; 1550 1551 case MTIOCRDSPOS: 1552 error = st_rdpos(st, 0, (u_int32_t *) arg); 1553 break; 1554 1555 case MTIOCRDHPOS: 1556 error = st_rdpos(st, 1, (u_int32_t *) arg); 1557 break; 1558 1559 case MTIOCSLOCATE: 1560 error = st_setpos(st, 0, (u_int32_t *) arg); 1561 break; 1562 1563 case MTIOCHLOCATE: 1564 error = st_setpos(st, 1, (u_int32_t *) arg); 1565 break; 1566 1567 1568 default: 1569 error = scsipi_do_ioctl(st->sc_periph, dev, cmd, arg, 1570 flag, l); 1571 break; 1572 } 1573 return (error); 1574 /*-----------------------------*/ 1575 try_new_value: 1576 /* 1577 * Check that the mode being asked for is aggreeable to the 1578 * drive. If not, put it back the way it was. 1579 * 1580 * If in control mode, we can make (persistent) mode changes 1581 * even if no medium is loaded (see st(4)). 1582 */ 1583 if ((STMODE(dev) != CTRL_MODE || (st->flags & ST_MOUNTED) != 0) && 1584 (error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 1585 /* put it back as it was */ 1586 printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); 1587 st->density = hold_density; 1588 st->blksize = hold_blksize; 1589 if (st->blksize) 1590 st->flags |= ST_FIXEDBLOCKS; 1591 else 1592 st->flags &= ~ST_FIXEDBLOCKS; 1593 return (error); 1594 } 1595 /* 1596 * As the drive liked it, if we are setting a new default, 1597 * set it into the structures as such. 1598 * 1599 * The means for deciding this are not finalised yet- but 1600 * if the device was opened in Control Mode, the values 1601 * are persistent now across mounts. 1602 */ 1603 if (STMODE(dev) == CTRL_MODE) { 1604 switch ((short) (mt->mt_op)) { 1605 case MTSETBSIZ: 1606 st->modes[dsty].blksize = st->blksize; 1607 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1608 break; 1609 case MTSETDNSTY: 1610 st->modes[dsty].density = st->density; 1611 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1612 break; 1613 } 1614 } 1615 return (0); 1616 } 1617 1618 /* 1619 * Do a synchronous read. 1620 */ 1621 static int 1622 st_read(struct st_softc *st, char *buf, int size, int flags) 1623 { 1624 struct scsi_rw_tape cmd; 1625 1626 /* 1627 * If it's a null transfer, return immediatly 1628 */ 1629 if (size == 0) 1630 return (0); 1631 memset(&cmd, 0, sizeof(cmd)); 1632 cmd.opcode = READ; 1633 if (st->flags & ST_FIXEDBLOCKS) { 1634 cmd.byte2 |= SRW_FIXED; 1635 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1636 cmd.len); 1637 } else 1638 _lto3b(size, cmd.len); 1639 return (scsipi_command(st->sc_periph, 1640 (struct scsipi_generic *)&cmd, sizeof(cmd), 1641 (u_char *)buf, size, 0, ST_IO_TIME, NULL, flags | XS_CTL_DATA_IN)); 1642 } 1643 1644 /* 1645 * issue an erase command 1646 */ 1647 static int 1648 st_erase(struct st_softc *st, int full, int flags) 1649 { 1650 int tmo; 1651 struct scsi_erase cmd; 1652 1653 /* 1654 * Full erase means set LONG bit in erase command, which asks 1655 * the drive to erase the entire unit. Without this bit, we're 1656 * asking the drive to write an erase gap. 1657 */ 1658 memset(&cmd, 0, sizeof(cmd)); 1659 cmd.opcode = ERASE; 1660 if (full) { 1661 cmd.byte2 = SE_LONG; 1662 tmo = ST_SPC_TIME; 1663 } else { 1664 tmo = ST_IO_TIME; 1665 } 1666 1667 /* 1668 * XXX We always do this asynchronously, for now, unless the device 1669 * has the ST_Q_ERASE_NOIMM quirk. How long should we wait if we 1670 * want to (eventually) to it synchronously? 1671 */ 1672 if ((st->quirks & ST_Q_ERASE_NOIMM) == 0) 1673 cmd.byte2 |= SE_IMMED; 1674 1675 return (scsipi_command(st->sc_periph, 1676 (struct scsipi_generic *)&cmd, sizeof(cmd), 1677 0, 0, ST_RETRIES, tmo, NULL, flags)); 1678 } 1679 1680 /* 1681 * skip N blocks/filemarks/seq filemarks/eom 1682 */ 1683 static int 1684 st_space(struct st_softc *st, int number, u_int what, int flags) 1685 { 1686 struct scsi_space cmd; 1687 int error; 1688 1689 switch (what) { 1690 case SP_BLKS: 1691 if (st->flags & ST_PER_ACTION) { 1692 if (number > 0) { 1693 st->flags &= ~ST_PER_ACTION; 1694 return (EIO); 1695 } else if (number < 0) { 1696 if (st->flags & ST_AT_FILEMARK) { 1697 /* 1698 * Handling of ST_AT_FILEMARK 1699 * in st_space will fill in the 1700 * right file mark count. 1701 */ 1702 error = st_space(st, 0, SP_FILEMARKS, 1703 flags); 1704 if (error) 1705 return (error); 1706 } 1707 if (st->flags & ST_BLANK_READ) { 1708 st->flags &= ~ST_BLANK_READ; 1709 return (EIO); 1710 } 1711 st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); 1712 } 1713 } 1714 break; 1715 case SP_FILEMARKS: 1716 if (st->flags & ST_EIO_PENDING) { 1717 if (number > 0) { 1718 /* pretend we just discovered the error */ 1719 st->flags &= ~ST_EIO_PENDING; 1720 return (EIO); 1721 } else if (number < 0) { 1722 /* back away from the error */ 1723 st->flags &= ~ST_EIO_PENDING; 1724 } 1725 } 1726 if (st->flags & ST_AT_FILEMARK) { 1727 st->flags &= ~ST_AT_FILEMARK; 1728 number--; 1729 } 1730 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 1731 /* back away from unwritten tape */ 1732 st->flags &= ~ST_BLANK_READ; 1733 number++; /* XXX dubious */ 1734 } 1735 break; 1736 case SP_EOM: 1737 if (st->flags & ST_EOM_PENDING) { 1738 /* we're already there */ 1739 st->flags &= ~ST_EOM_PENDING; 1740 return (0); 1741 } 1742 if (st->flags & ST_EIO_PENDING) { 1743 /* pretend we just discovered the error */ 1744 st->flags &= ~ST_EIO_PENDING; 1745 return (EIO); 1746 } 1747 if (st->flags & ST_AT_FILEMARK) 1748 st->flags &= ~ST_AT_FILEMARK; 1749 break; 1750 } 1751 if (number == 0) 1752 return (0); 1753 1754 memset(&cmd, 0, sizeof(cmd)); 1755 cmd.opcode = SPACE; 1756 cmd.byte2 = what; 1757 _lto3b(number, cmd.number); 1758 1759 st->flags &= ~ST_POSUPDATED; 1760 st->last_ctl_resid = 0; 1761 error = scsipi_command(st->sc_periph, 1762 (struct scsipi_generic *)&cmd, sizeof(cmd), 1763 0, 0, 0, ST_SPC_TIME, NULL, flags); 1764 1765 if (error == 0 && (st->flags & ST_POSUPDATED) == 0) { 1766 number = number - st->last_ctl_resid; 1767 if (what == SP_BLKS) { 1768 if (st->blkno != -1) { 1769 st->blkno += number; 1770 } 1771 } else if (what == SP_FILEMARKS) { 1772 if (st->fileno != -1) { 1773 st->fileno += number; 1774 if (number > 0) { 1775 st->blkno = 0; 1776 } else if (number < 0) { 1777 st->blkno = -1; 1778 } 1779 } 1780 } else if (what == SP_EOM) { 1781 /* 1782 * This loses us relative position. 1783 */ 1784 st->fileno = st->blkno = -1; 1785 } 1786 } 1787 return (error); 1788 } 1789 1790 /* 1791 * write N filemarks 1792 */ 1793 static int 1794 st_write_filemarks(struct st_softc *st, int number, int flags) 1795 { 1796 int error; 1797 struct scsi_write_filemarks cmd; 1798 1799 /* 1800 * It's hard to write a negative number of file marks. 1801 * Don't try. 1802 */ 1803 if (number < 0) 1804 return (EINVAL); 1805 switch (number) { 1806 case 0: /* really a command to sync the drive's buffers */ 1807 break; 1808 case 1: 1809 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 1810 st->flags &= ~ST_WRITTEN; 1811 else 1812 st->flags |= ST_FM_WRITTEN; 1813 st->flags &= ~ST_PER_ACTION; 1814 break; 1815 default: 1816 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 1817 } 1818 1819 memset(&cmd, 0, sizeof(cmd)); 1820 cmd.opcode = WRITE_FILEMARKS; 1821 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1822 cmd.byte2 = SR_IMMED; 1823 /* 1824 * The ATAPI Onstream DI-30 doesn't support writing filemarks, but 1825 * WRITE_FILEMARKS is still used to flush the buffer 1826 */ 1827 if ((st->quirks & ST_Q_NOFILEMARKS) == 0) 1828 _lto3b(number, cmd.number); 1829 1830 /* XXX WE NEED TO BE ABLE TO GET A RESIDIUAL XXX */ 1831 error = scsipi_command(st->sc_periph, 1832 (struct scsipi_generic *)&cmd, sizeof(cmd), 1833 0, 0, 0, ST_IO_TIME * 4, NULL, flags); 1834 if (error == 0 && st->fileno != -1) { 1835 st->fileno += number; 1836 } 1837 return (error); 1838 } 1839 1840 /* 1841 * Make sure the right number of file marks is on tape if the 1842 * tape has been written. If the position argument is true, 1843 * leave the tape positioned where it was originally. 1844 * 1845 * nmarks returns the number of marks to skip (or, if position 1846 * true, which were skipped) to get back original position. 1847 */ 1848 static int 1849 st_check_eod(struct st_softc *st, boolean position, int *nmarks, int flags) 1850 { 1851 int error; 1852 1853 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 1854 default: 1855 *nmarks = 0; 1856 return (0); 1857 case ST_WRITTEN: 1858 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 1859 *nmarks = 1; 1860 break; 1861 case ST_WRITTEN | ST_2FM_AT_EOD: 1862 *nmarks = 2; 1863 } 1864 error = st_write_filemarks(st, *nmarks, flags); 1865 if (position && !error) 1866 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 1867 return (error); 1868 } 1869 1870 /* 1871 * load/unload/retension 1872 */ 1873 static int 1874 st_load(struct st_softc *st, u_int type, int flags) 1875 { 1876 int error; 1877 struct scsi_load cmd; 1878 1879 if (type != LD_LOAD) { 1880 int nmarks; 1881 1882 error = st_check_eod(st, FALSE, &nmarks, flags); 1883 if (error) { 1884 printf("%s: failed to write closing filemarks at " 1885 "unload, errno=%d\n", st->sc_dev.dv_xname, error); 1886 return (error); 1887 } 1888 } 1889 if (st->quirks & ST_Q_IGNORE_LOADS) { 1890 if (type == LD_LOAD) { 1891 /* 1892 * If we ignore loads, at least we should try a rewind. 1893 */ 1894 return st_rewind(st, 0, flags); 1895 } 1896 /* otherwise, we should do what's asked of us */ 1897 } 1898 1899 memset(&cmd, 0, sizeof(cmd)); 1900 cmd.opcode = LOAD; 1901 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1902 cmd.byte2 = SR_IMMED; 1903 cmd.how = type; 1904 1905 error = scsipi_command(st->sc_periph, 1906 (struct scsipi_generic *)&cmd, sizeof(cmd), 1907 0, 0, ST_RETRIES, ST_SPC_TIME, NULL, flags); 1908 if (error) { 1909 printf("%s: error %d in st_load (op %d)\n", 1910 st->sc_dev.dv_xname, error, type); 1911 } 1912 return (error); 1913 } 1914 1915 /* 1916 * Rewind the device 1917 */ 1918 static int 1919 st_rewind(struct st_softc *st, u_int immediate, int flags) 1920 { 1921 struct scsi_rewind cmd; 1922 int error; 1923 int nmarks; 1924 1925 error = st_check_eod(st, FALSE, &nmarks, flags); 1926 if (error) { 1927 printf("%s: failed to write closing filemarks at " 1928 "rewind, errno=%d\n", st->sc_dev.dv_xname, error); 1929 return (error); 1930 } 1931 st->flags &= ~ST_PER_ACTION; 1932 1933 /* 1934 * ATAPI tapes always need immediate to be set 1935 */ 1936 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1937 immediate = SR_IMMED; 1938 1939 memset(&cmd, 0, sizeof(cmd)); 1940 cmd.opcode = REWIND; 1941 cmd.byte2 = immediate; 1942 1943 error = scsipi_command(st->sc_periph, 1944 (struct scsipi_generic *)&cmd, sizeof(cmd), 0, 0, ST_RETRIES, 1945 immediate ? ST_CTL_TIME: ST_SPC_TIME, NULL, flags); 1946 if (error) { 1947 printf("%s: error %d trying to rewind\n", 1948 st->sc_dev.dv_xname, error); 1949 /* lost position */ 1950 st->fileno = st->blkno = -1; 1951 } else { 1952 st->fileno = st->blkno = 0; 1953 } 1954 return (error); 1955 } 1956 1957 static int 1958 st_rdpos(struct st_softc *st, int hard, u_int32_t *blkptr) 1959 { 1960 int error; 1961 u_int8_t posdata[20]; 1962 struct scsi_tape_read_position cmd; 1963 1964 /* 1965 * We try and flush any buffered writes here if we were writing 1966 * and we're trying to get hardware block position. It eats 1967 * up performance substantially, but I'm wary of drive firmware. 1968 * 1969 * I think that *logical* block position is probably okay- 1970 * but hardware block position might have to wait for data 1971 * to hit media to be valid. Caveat Emptor. 1972 */ 1973 1974 if (hard && (st->flags & ST_WRITTEN)) { 1975 /* 1976 * First flush any pending writes... 1977 */ 1978 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 1979 /* 1980 * The latter case is for 'write protected' tapes 1981 * which are too stupid to recognize a zero count 1982 * for writing filemarks as a no-op. 1983 */ 1984 if (error != 0 && error != EACCES && error != EROFS) 1985 return (error); 1986 } 1987 1988 memset(&cmd, 0, sizeof(cmd)); 1989 memset(&posdata, 0, sizeof(posdata)); 1990 cmd.opcode = READ_POSITION; 1991 if (hard) 1992 cmd.byte1 = 1; 1993 1994 error = scsipi_command(st->sc_periph, 1995 (struct scsipi_generic *)&cmd, sizeof(cmd), (u_char *)&posdata, 1996 sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, 1997 XS_CTL_SILENT | XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); 1998 1999 if (error == 0) { 2000 #if 0 2001 printf("posdata:"); 2002 for (hard = 0; hard < sizeof(posdata); hard++) 2003 printf("%02x ", posdata[hard] & 0xff); 2004 printf("\n"); 2005 #endif 2006 if (posdata[0] & 0x4) /* Block Position Unknown */ 2007 error = EINVAL; 2008 else 2009 *blkptr = _4btol(&posdata[4]); 2010 } 2011 return (error); 2012 } 2013 2014 static int 2015 st_setpos(struct st_softc *st, int hard, u_int32_t *blkptr) 2016 { 2017 int error; 2018 struct scsi_tape_locate cmd; 2019 2020 /* 2021 * We used to try and flush any buffered writes here. 2022 * Now we push this onto user applications to either 2023 * flush the pending writes themselves (via a zero count 2024 * WRITE FILEMARKS command) or they can trust their tape 2025 * drive to do this correctly for them. 2026 * 2027 * There are very ugly performance limitations otherwise. 2028 */ 2029 2030 memset(&cmd, 0, sizeof(cmd)); 2031 cmd.opcode = LOCATE; 2032 if (hard) 2033 cmd.byte2 = 1 << 2; 2034 _lto4b(*blkptr, cmd.blkaddr); 2035 error = scsipi_command(st->sc_periph, 2036 (struct scsipi_generic *)&cmd, sizeof(cmd), 2037 NULL, 0, ST_RETRIES, ST_SPC_TIME, NULL, 0); 2038 /* 2039 * Note file && block number position now unknown (if 2040 * these things ever start being maintained in this driver) 2041 */ 2042 st->fileno = st->blkno = -1; 2043 return (error); 2044 } 2045 2046 2047 /* 2048 * Look at the returned sense and act on the error and determine 2049 * the unix error number to pass back..., 0 (== report no error), 2050 * -1 = retry the operation, -2 continue error processing. 2051 */ 2052 static int 2053 st_interpret_sense(struct scsipi_xfer *xs) 2054 { 2055 struct scsipi_periph *periph = xs->xs_periph; 2056 struct scsipi_sense_data *sense = &xs->sense.scsi_sense; 2057 struct buf *bp = xs->bp; 2058 struct st_softc *st = (void *)periph->periph_dev; 2059 int retval = EJUSTRETURN; 2060 int doprint = ((xs->xs_control & XS_CTL_SILENT) == 0); 2061 u_int8_t key; 2062 int32_t info; 2063 2064 /* 2065 * If it isn't a extended or extended/deferred error, let 2066 * the generic code handle it. 2067 */ 2068 if ((sense->error_code & SSD_ERRCODE) != 0x70 && 2069 (sense->error_code & SSD_ERRCODE) != 0x71) { /* DEFFERRED */ 2070 return (retval); 2071 } 2072 2073 if (sense->error_code & SSD_ERRCODE_VALID) 2074 info = _4btol(sense->info); 2075 else 2076 info = (st->flags & ST_FIXEDBLOCKS) ? 2077 xs->datalen / st->blksize : xs->datalen; 2078 key = sense->flags & SSD_KEY; 2079 st->mt_erreg = key; 2080 st->asc = sense->add_sense_code; 2081 st->ascq = sense->add_sense_code_qual; 2082 st->mt_resid = (short) info; 2083 2084 if (key == SKEY_NOT_READY && st->asc == 0x4 && st->ascq == 0x1) { 2085 /* Not Ready, Logical Unit Is in Process Of Becoming Ready */ 2086 if (!callout_pending(&periph->periph_callout)) 2087 scsipi_periph_freeze(periph, 1); 2088 callout_reset(&periph->periph_callout, 2089 hz, scsipi_periph_timed_thaw, periph); 2090 return (ERESTART); 2091 } 2092 2093 /* 2094 * If the device is not open yet, let generic handle 2095 */ 2096 if ((periph->periph_flags & PERIPH_OPEN) == 0) { 2097 return (retval); 2098 } 2099 2100 xs->resid = info; 2101 if (st->flags & ST_FIXEDBLOCKS) { 2102 if (bp) { 2103 xs->resid *= st->blksize; 2104 st->last_io_resid = xs->resid; 2105 } else { 2106 st->last_ctl_resid = xs->resid; 2107 } 2108 if (key == SKEY_VOLUME_OVERFLOW) { 2109 st->flags |= ST_EIO_PENDING; 2110 if (bp) 2111 bp->b_resid = xs->resid; 2112 } else if (sense->flags & SSD_EOM) { 2113 if ((st->flags & ST_EARLYWARN) == 0) 2114 st->flags |= ST_EIO_PENDING; 2115 st->flags |= ST_EOM_PENDING; 2116 if (bp) { 2117 #if 0 2118 bp->b_resid = xs->resid; 2119 #else 2120 /* 2121 * Grotesque as it seems, the few times 2122 * I've actually seen a non-zero resid, 2123 * the tape drive actually lied and had 2124 * written all the data! 2125 */ 2126 bp->b_resid = 0; 2127 #endif 2128 } 2129 } 2130 if (sense->flags & SSD_FILEMARK) { 2131 st->flags |= ST_AT_FILEMARK; 2132 if (bp) 2133 bp->b_resid = xs->resid; 2134 if (st->fileno != (daddr_t) -1) { 2135 st->fileno++; 2136 st->blkno = 0; 2137 st->flags |= ST_POSUPDATED; 2138 } 2139 } 2140 if (sense->flags & SSD_ILI) { 2141 st->flags |= ST_EIO_PENDING; 2142 if (bp) 2143 bp->b_resid = xs->resid; 2144 if (sense->error_code & SSD_ERRCODE_VALID && 2145 (xs->xs_control & XS_CTL_SILENT) == 0) 2146 printf("%s: block wrong size, %d blocks " 2147 "residual\n", st->sc_dev.dv_xname, info); 2148 2149 /* 2150 * This quirk code helps the drive read 2151 * the first tape block, regardless of 2152 * format. That is required for these 2153 * drives to return proper MODE SENSE 2154 * information. 2155 */ 2156 if ((st->quirks & ST_Q_SENSE_HELP) && 2157 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 2158 st->blksize -= 512; 2159 else if ((st->flags & ST_POSUPDATED) == 0) { 2160 if (st->blkno != (daddr_t) -1) { 2161 st->blkno += 2162 (xs->datalen / st->blksize); 2163 st->flags |= ST_POSUPDATED; 2164 } 2165 } 2166 } 2167 /* 2168 * If data wanted and no data was transferred, do it immediately 2169 */ 2170 if (xs->datalen && xs->resid >= xs->datalen) { 2171 if (st->flags & ST_EIO_PENDING) 2172 return (EIO); 2173 if (st->flags & ST_AT_FILEMARK) { 2174 if (bp) 2175 bp->b_resid = xs->resid; 2176 return (0); 2177 } 2178 } 2179 } else { /* must be variable mode */ 2180 if (bp) { 2181 st->last_io_resid = xs->resid; 2182 } else { 2183 st->last_ctl_resid = xs->resid; 2184 } 2185 if (sense->flags & SSD_EOM) { 2186 /* 2187 * The current semantics of this 2188 * driver requires EOM detection 2189 * to return EIO unless early 2190 * warning detection is enabled 2191 * for variable mode (this is always 2192 * on for fixed block mode). 2193 */ 2194 if (st->flags & ST_EARLYWARN) { 2195 st->flags |= ST_EOM_PENDING; 2196 retval = 0; 2197 } else { 2198 retval = EIO; 2199 } 2200 2201 /* 2202 * If it's an unadorned EOM detection, 2203 * suppress printing an error. 2204 */ 2205 if (key == SKEY_NO_SENSE) { 2206 doprint = 0; 2207 } 2208 } else if (sense->flags & SSD_FILEMARK) { 2209 retval = 0; 2210 if (st->fileno != (daddr_t) -1) { 2211 st->fileno++; 2212 st->blkno = 0; 2213 st->flags |= ST_POSUPDATED; 2214 } 2215 } else if (sense->flags & SSD_ILI) { 2216 if (info < 0) { 2217 /* 2218 * The tape record was bigger than the read 2219 * we issued. 2220 */ 2221 if ((xs->xs_control & XS_CTL_SILENT) == 0) { 2222 printf("%s: %d-byte tape record too big" 2223 " for %d-byte user buffer\n", 2224 st->sc_dev.dv_xname, 2225 xs->datalen - info, xs->datalen); 2226 } 2227 retval = EIO; 2228 } else { 2229 retval = 0; 2230 if (st->blkno != (daddr_t) -1) { 2231 st->blkno++; 2232 st->flags |= ST_POSUPDATED; 2233 } 2234 } 2235 } 2236 if (bp) 2237 bp->b_resid = info; 2238 } 2239 2240 #ifndef SCSIPI_DEBUG 2241 if (retval == 0 && key == SKEY_NO_SENSE) 2242 doprint = 0; 2243 #endif 2244 if (key == SKEY_BLANK_CHECK) { 2245 /* 2246 * This quirk code helps the drive read the 2247 * first tape block, regardless of format. That 2248 * is required for these drives to return proper 2249 * MODE SENSE information. 2250 */ 2251 if ((st->quirks & ST_Q_SENSE_HELP) && 2252 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 2253 /* still starting */ 2254 st->blksize -= 512; 2255 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 2256 st->flags |= ST_BLANK_READ; 2257 xs->resid = xs->datalen; 2258 if (bp) { 2259 bp->b_resid = xs->resid; 2260 /* return an EOF */ 2261 } 2262 retval = 0; 2263 /* lost position */ 2264 st->fileno = st->blkno = -1; 2265 } 2266 } 2267 2268 /* 2269 * If generic sense processing will continue, we should not 2270 * print sense info here. 2271 */ 2272 if (retval == EJUSTRETURN) 2273 doprint = 0; 2274 2275 if (doprint) { 2276 #ifdef SCSIVERBOSE 2277 scsipi_print_sense(xs, 0); 2278 #else 2279 scsipi_printaddr(periph); 2280 printf("Sense Key 0x%02x", key); 2281 if ((sense->error_code & SSD_ERRCODE_VALID) != 0) { 2282 switch (key) { 2283 case SKEY_NOT_READY: 2284 case SKEY_ILLEGAL_REQUEST: 2285 case SKEY_UNIT_ATTENTION: 2286 case SKEY_WRITE_PROTECT: 2287 break; 2288 case SKEY_VOLUME_OVERFLOW: 2289 case SKEY_BLANK_CHECK: 2290 printf(", requested size: %d (decimal)", info); 2291 break; 2292 case SKEY_ABORTED_COMMAND: 2293 if (xs->xs_retries) 2294 printf(", retrying"); 2295 printf(", cmd 0x%x, info 0x%x", 2296 xs->cmd->opcode, info); 2297 break; 2298 default: 2299 printf(", info = %d (decimal)", info); 2300 } 2301 } 2302 if (sense->extra_len != 0) { 2303 int n; 2304 printf(", data ="); 2305 for (n = 0; n < sense->extra_len; n++) 2306 printf(" %02x", sense->cmd_spec_info[n]); 2307 } 2308 printf("\n"); 2309 #endif 2310 } 2311 return (retval); 2312 } 2313 2314 /* 2315 * The quirk here is that the drive returns some value to st_mode_sense 2316 * incorrectly until the tape has actually passed by the head. 2317 * 2318 * The method is to set the drive to large fixed-block state (user-specified 2319 * density and 1024-byte blocks), then read and rewind to get it to sense the 2320 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 2321 * work, as a last resort, try variable- length blocks. The result will be 2322 * the ability to do an accurate st_mode_sense. 2323 * 2324 * We know we can do a rewind because we just did a load, which implies rewind. 2325 * Rewind seems preferable to space backward if we have a virgin tape. 2326 * 2327 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 2328 * error processing, both part of st_interpret_sense. 2329 */ 2330 static int 2331 st_touch_tape(struct st_softc *st) 2332 { 2333 char *buf; 2334 int readsize; 2335 int error; 2336 2337 buf = malloc(1024, M_TEMP, M_NOWAIT); 2338 if (buf == NULL) 2339 return (ENOMEM); 2340 2341 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 2342 goto bad; 2343 2344 /* 2345 * If the block size is already known from the 2346 * sense data, use it. Else start probing at 1024. 2347 */ 2348 if (st->media_blksize > 0) 2349 st->blksize = st->media_blksize; 2350 else 2351 st->blksize = 1024; 2352 2353 do { 2354 switch (st->blksize) { 2355 case 512: 2356 case 1024: 2357 readsize = st->blksize; 2358 st->flags |= ST_FIXEDBLOCKS; 2359 break; 2360 default: 2361 readsize = 1; 2362 st->flags &= ~ST_FIXEDBLOCKS; 2363 } 2364 if ((error = st->ops(st, ST_OPS_MODESELECT, XS_CTL_SILENT)) 2365 != 0) { 2366 /* 2367 * The device did not agree with the proposed 2368 * block size. If we exhausted our options, 2369 * return failure, else try another. 2370 */ 2371 if (readsize == 1) 2372 goto bad; 2373 st->blksize -= 512; 2374 continue; 2375 } 2376 st_read(st, buf, readsize, XS_CTL_SILENT); /* XXX */ 2377 if ((error = st_rewind(st, 0, 0)) != 0) { 2378 bad: free(buf, M_TEMP); 2379 return (error); 2380 } 2381 } while (readsize != 1 && readsize > st->blksize); 2382 2383 free(buf, M_TEMP); 2384 return (0); 2385 } 2386 2387 static int 2388 stdump(dev_t dev, daddr_t blkno, caddr_t va, size_t size) 2389 { 2390 2391 /* Not implemented. */ 2392 return (ENXIO); 2393 } 2394
Indexes created Fri Sep 26 20:09:58 GMT 2025