st.c revision 1.172
1 /* $NetBSD: st.c,v 1.172 2004/09/26 09:00:37 dogcow Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 2004 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Charles M. Hannum. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Originally written by Julian Elischer (julian (at) tfs.com) 41 * for TRW Financial Systems for use under the MACH(2.5) operating system. 42 * 43 * TRW Financial Systems, in accordance with their agreement with Carnegie 44 * Mellon University, makes this software available to CMU to distribute 45 * or use in any manner that they see fit as long as this message is kept with 46 * the software. For this reason TFS also grants any other persons or 47 * organisations permission to use or modify this software. 48 * 49 * TFS supplies this software to be publicly redistributed 50 * on the understanding that TFS is not responsible for the correct 51 * functioning of this software in any circumstances. 52 * 53 * Ported to run under 386BSD by Julian Elischer (julian (at) tfs.com) Sept 1992 54 * major changes by Julian Elischer (julian (at) jules.dialix.oz.au) May 1993 55 * 56 * A lot of rewhacking done by mjacob (mjacob (at) nas.nasa.gov). 57 */ 58 59 #include <sys/cdefs.h> 60 __KERNEL_RCSID(0, "$NetBSD: st.c,v 1.172 2004/09/26 09:00:37 dogcow 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/scsipi_all.h> 80 #include <dev/scsipi/scsi_all.h> 81 #include <dev/scsipi/scsi_tape.h> 82 #include <dev/scsipi/scsipiconf.h> 83 #include <dev/scsipi/scsipi_base.h> 84 #include <dev/scsipi/stvar.h> 85 86 /* Defines for device specific stuff */ 87 #define DEF_FIXED_BSIZE 512 88 89 #define STMODE(z) ( minor(z) & 0x03) 90 #define STDSTY(z) ((minor(z) >> 2) & 0x03) 91 #define STUNIT(z) ((minor(z) >> 4) ) 92 #define STNMINOR 16 93 94 #define NORMAL_MODE 0 95 #define NOREW_MODE 1 96 #define EJECT_MODE 2 97 #define CTRL_MODE 3 98 99 #define FALSE 0 100 #define TRUE 1 101 102 #ifndef ST_MOUNT_DELAY 103 #define ST_MOUNT_DELAY 0 104 #endif 105 106 static dev_type_open(stopen); 107 static dev_type_close(stclose); 108 static dev_type_read(stread); 109 static dev_type_write(stwrite); 110 static dev_type_ioctl(stioctl); 111 static dev_type_strategy(ststrategy); 112 static dev_type_dump(stdump); 113 114 const struct bdevsw st_bdevsw = { 115 stopen, stclose, ststrategy, stioctl, stdump, nosize, D_TAPE 116 }; 117 118 const struct cdevsw st_cdevsw = { 119 stopen, stclose, stread, stwrite, stioctl, 120 nostop, notty, nopoll, nommap, nokqfilter, D_TAPE 121 }; 122 123 /* 124 * Define various devices that we know mis-behave in some way, 125 * and note how they are bad, so we can correct for them 126 */ 127 128 static const struct st_quirk_inquiry_pattern st_quirk_patterns[] = { 129 {{T_SEQUENTIAL, T_REMOV, 130 " ", " ", " "}, {0, 0, { 131 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 132 {ST_Q_FORCE_BLKSIZE, 512, QIC_24}, /* minor 4-7 */ 133 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_1600}, /* minor 8-11 */ 134 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_6250} /* minor 12-15 */ 135 }}}, 136 {{T_SEQUENTIAL, T_REMOV, 137 "TANDBERG", " TDC 3600 ", ""}, {0, 12, { 138 {0, 0, 0}, /* minor 0-3 */ 139 {ST_Q_FORCE_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 140 {0, 0, QIC_150}, /* minor 8-11 */ 141 {0, 0, QIC_120} /* minor 12-15 */ 142 }}}, 143 {{T_SEQUENTIAL, T_REMOV, 144 "TANDBERG", " TDC 3800 ", ""}, {0, 0, { 145 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 146 {0, 0, QIC_525}, /* minor 4-7 */ 147 {0, 0, QIC_150}, /* minor 8-11 */ 148 {0, 0, QIC_120} /* minor 12-15 */ 149 }}}, 150 {{T_SEQUENTIAL, T_REMOV, 151 "TANDBERG", " SLR5 4/8GB ", ""}, {0, 0, { 152 {ST_Q_FORCE_BLKSIZE, 1024, 0}, /* minor 0-3 */ 153 {0, 0, 0}, /* minor 4-7 */ 154 {0, 0, 0}, /* minor 8-11 */ 155 {0, 0, 0} /* minor 12-15 */ 156 }}}, 157 /* 158 * lacking a manual for the 4200, it's not clear what the 159 * specific density codes should be- the device is a 2.5GB 160 * capable QIC drive, those density codes aren't readily 161 * availabel. The 'default' will just have to do. 162 */ 163 {{T_SEQUENTIAL, T_REMOV, 164 "TANDBERG", " TDC 4200 ", ""}, {0, 0, { 165 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 166 {0, 0, QIC_525}, /* minor 4-7 */ 167 {0, 0, QIC_150}, /* minor 8-11 */ 168 {0, 0, QIC_120} /* minor 12-15 */ 169 }}}, 170 /* 171 * At least -005 and -007 need this. I'll assume they all do unless I 172 * hear otherwise. - mycroft, 31MAR1994 173 */ 174 {{T_SEQUENTIAL, T_REMOV, 175 "ARCHIVE ", "VIPER 2525 25462", ""}, {0, 0, { 176 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 177 {ST_Q_SENSE_HELP, 0, QIC_525}, /* minor 4-7 */ 178 {0, 0, QIC_150}, /* minor 8-11 */ 179 {0, 0, QIC_120} /* minor 12-15 */ 180 }}}, 181 /* 182 * One user reports that this works for his tape drive. It probably 183 * needs more work. - mycroft, 09APR1994 184 */ 185 {{T_SEQUENTIAL, T_REMOV, 186 "SANKYO ", "CP525 ", ""}, {0, 0, { 187 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 188 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 189 {0, 0, QIC_150}, /* minor 8-11 */ 190 {0, 0, QIC_120} /* minor 12-15 */ 191 }}}, 192 {{T_SEQUENTIAL, T_REMOV, 193 "ANRITSU ", "DMT780 ", ""}, {0, 0, { 194 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 195 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 196 {0, 0, QIC_150}, /* minor 8-11 */ 197 {0, 0, QIC_120} /* minor 12-15 */ 198 }}}, 199 {{T_SEQUENTIAL, T_REMOV, 200 "ARCHIVE ", "VIPER 150 21247", ""}, {ST_Q_ERASE_NOIMM, 12, { 201 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 202 {0, 0, QIC_150}, /* minor 4-7 */ 203 {0, 0, QIC_120}, /* minor 8-11 */ 204 {0, 0, QIC_24} /* minor 12-15 */ 205 }}}, 206 {{T_SEQUENTIAL, T_REMOV, 207 "ARCHIVE ", "VIPER 150 21531", ""}, {ST_Q_ERASE_NOIMM, 12, { 208 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 209 {0, 0, QIC_150}, /* minor 4-7 */ 210 {0, 0, QIC_120}, /* minor 8-11 */ 211 {0, 0, QIC_24} /* minor 12-15 */ 212 }}}, 213 {{T_SEQUENTIAL, T_REMOV, 214 "WANGTEK ", "5099ES SCSI", ""}, {0, 0, { 215 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 216 {0, 0, QIC_11}, /* minor 4-7 */ 217 {0, 0, QIC_24}, /* minor 8-11 */ 218 {0, 0, QIC_24} /* minor 12-15 */ 219 }}}, 220 {{T_SEQUENTIAL, T_REMOV, 221 "WANGTEK ", "5150ES SCSI", ""}, {0, 0, { 222 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 223 {0, 0, QIC_24}, /* minor 4-7 */ 224 {0, 0, QIC_120}, /* minor 8-11 */ 225 {0, 0, QIC_150} /* minor 12-15 */ 226 }}}, 227 {{T_SEQUENTIAL, T_REMOV, 228 "WANGTEK ", "5525ES SCSI REV7", ""}, {0, 0, { 229 {0, 0, 0}, /* minor 0-3 */ 230 {ST_Q_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 231 {0, 0, QIC_150}, /* minor 8-11 */ 232 {0, 0, QIC_120} /* minor 12-15 */ 233 }}}, 234 {{T_SEQUENTIAL, T_REMOV, 235 "WangDAT ", "Model 1300 ", ""}, {0, 0, { 236 {0, 0, 0}, /* minor 0-3 */ 237 {ST_Q_FORCE_BLKSIZE, 512, DDS}, /* minor 4-7 */ 238 {ST_Q_FORCE_BLKSIZE, 1024, DDS}, /* minor 8-11 */ 239 {ST_Q_FORCE_BLKSIZE, 0, DDS} /* minor 12-15 */ 240 }}}, 241 {{T_SEQUENTIAL, T_REMOV, 242 "EXABYTE ", "EXB-8200 ", "263H"}, {0, 5, { 243 {0, 0, 0}, /* minor 0-3 */ 244 {0, 0, 0}, /* minor 4-7 */ 245 {0, 0, 0}, /* minor 8-11 */ 246 {0, 0, 0} /* minor 12-15 */ 247 }}}, 248 {{T_SEQUENTIAL, T_REMOV, 249 "STK", "9490", ""}, 250 {ST_Q_FORCE_BLKSIZE, 0, { 251 {0, 0, 0}, /* minor 0-3 */ 252 {0, 0, 0}, /* minor 4-7 */ 253 {0, 0, 0}, /* minor 8-11 */ 254 {0, 0, 0} /* minor 12-15 */ 255 }}}, 256 {{T_SEQUENTIAL, T_REMOV, 257 "STK", "SD-3", ""}, 258 {ST_Q_FORCE_BLKSIZE, 0, { 259 {0, 0, 0}, /* minor 0-3 */ 260 {0, 0, 0}, /* minor 4-7 */ 261 {0, 0, 0}, /* minor 8-11 */ 262 {0, 0, 0} /* minor 12-15 */ 263 }}}, 264 {{T_SEQUENTIAL, T_REMOV, 265 "IBM", "03590", ""}, {ST_Q_IGNORE_LOADS, 0, { 266 {0, 0, 0}, /* minor 0-3 */ 267 {0, 0, 0}, /* minor 4-7 */ 268 {0, 0, 0}, /* minor 8-11 */ 269 {0, 0, 0} /* minor 12-15 */ 270 }}}, 271 {{T_SEQUENTIAL, T_REMOV, 272 "HP ", "T4000s ", ""}, {ST_Q_UNIMODAL, 0, { 273 {0, 0, QIC_3095}, /* minor 0-3 */ 274 {0, 0, QIC_3095}, /* minor 4-7 */ 275 {0, 0, QIC_3095}, /* minor 8-11 */ 276 {0, 0, QIC_3095}, /* minor 12-15 */ 277 }}}, 278 #if 0 279 {{T_SEQUENTIAL, T_REMOV, 280 "EXABYTE ", "EXB-8200 ", ""}, {0, 12, { 281 {0, 0, 0}, /* minor 0-3 */ 282 {0, 0, 0}, /* minor 4-7 */ 283 {0, 0, 0}, /* minor 8-11 */ 284 {0, 0, 0} /* minor 12-15 */ 285 }}}, 286 #endif 287 {{T_SEQUENTIAL, T_REMOV, 288 "TEAC ", "MT-2ST/N50 ", ""}, {ST_Q_IGNORE_LOADS, 0, { 289 {0, 0, 0}, /* minor 0-3 */ 290 {0, 0, 0}, /* minor 4-7 */ 291 {0, 0, 0}, /* minor 8-11 */ 292 {0, 0, 0} /* minor 12-15 */ 293 }}}, 294 {{T_SEQUENTIAL, T_REMOV, 295 "OnStream", "ADR50 Drive", ""}, {ST_Q_UNIMODAL, 0, { 296 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 297 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 4-7 */ 298 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 8-11 */ 299 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 12-15 */ 300 }}}, 301 {{T_SEQUENTIAL, T_REMOV, 302 "OnStream DI-30", "", "1.0"}, {ST_Q_NOFILEMARKS, 0, { 303 {0, 0, 0}, /* minor 0-3 */ 304 {0, 0, 0}, /* minor 4-7 */ 305 {0, 0, 0}, /* minor 8-11 */ 306 {0, 0, 0} /* minor 12-15 */ 307 }}}, 308 {{T_SEQUENTIAL, T_REMOV, 309 "NCR H621", "0-STD-03-46F880 ", ""}, {ST_Q_NOPREVENT, 0, { 310 {0, 0, 0}, /* minor 0-3 */ 311 {0, 0, 0}, /* minor 4-7 */ 312 {0, 0, 0}, /* minor 8-11 */ 313 {0, 0, 0} /* minor 12-15 */ 314 }}}, 315 }; 316 317 #define NOEJECT 0 318 #define EJECT 1 319 320 static void st_identify_drive(struct st_softc *, 321 struct scsipi_inquiry_pattern *); 322 static void st_loadquirks(struct st_softc *); 323 static int st_mount_tape(dev_t, int); 324 static void st_unmount(struct st_softc *, boolean); 325 static int st_decide_mode(struct st_softc *, boolean); 326 static void ststart(struct scsipi_periph *); 327 static void strestart(void *); 328 static void stdone(struct scsipi_xfer *, int); 329 static int st_read(struct st_softc *, char *, int, int); 330 static int st_space(struct st_softc *, int, u_int, int); 331 static int st_write_filemarks(struct st_softc *, int, int); 332 static int st_check_eod(struct st_softc *, boolean, int *, int); 333 static int st_load(struct st_softc *, u_int, int); 334 static int st_rewind(struct st_softc *, u_int, int); 335 static int st_interpret_sense(struct scsipi_xfer *); 336 static int st_touch_tape(struct st_softc *); 337 static int st_erase(struct st_softc *, int full, int flags); 338 static int st_rdpos(struct st_softc *, int, u_int32_t *); 339 static int st_setpos(struct st_softc *, int, u_int32_t *); 340 341 static const struct scsipi_periphsw st_switch = { 342 st_interpret_sense, 343 ststart, 344 NULL, 345 stdone 346 }; 347 348 #if defined(ST_ENABLE_EARLYWARN) 349 #define ST_INIT_FLAGS ST_EARLYWARN 350 #else 351 #define ST_INIT_FLAGS 0 352 #endif 353 354 /* 355 * The routine called by the low level scsi routine when it discovers 356 * A device suitable for this driver 357 */ 358 void 359 stattach(struct device *parent, struct st_softc *st, 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(struct device *self, enum devact act) 419 { 420 int rv = 0; 421 422 switch (act) { 423 case DVACT_ACTIVATE: 424 rv = EOPNOTSUPP; 425 break; 426 427 case DVACT_DEACTIVATE: 428 /* 429 * Nothing to do; we key off the device's DVF_ACTIVE. 430 */ 431 break; 432 } 433 return (rv); 434 } 435 436 int 437 stdetach(struct device *self, int flags) 438 { 439 struct st_softc *st = (struct st_softc *)self; 440 struct buf *bp; 441 int s, bmaj, cmaj, mn; 442 443 /* locate the major number */ 444 bmaj = bdevsw_lookup_major(&st_bdevsw); 445 cmaj = cdevsw_lookup_major(&st_cdevsw); 446 447 /* kill any pending restart */ 448 callout_stop(&st->sc_callout); 449 450 s = splbio(); 451 452 /* Kill off any queued buffers. */ 453 while ((bp = BUFQ_GET(&st->buf_queue)) != NULL) { 454 bp->b_error = EIO; 455 bp->b_flags |= B_ERROR; 456 bp->b_resid = bp->b_bcount; 457 biodone(bp); 458 } 459 460 bufq_free(&st->buf_queue); 461 462 /* Kill off any pending commands. */ 463 scsipi_kill_pending(st->sc_periph); 464 465 splx(s); 466 467 /* Nuke the vnodes for any open instances */ 468 mn = STUNIT(self->dv_unit); 469 vdevgone(bmaj, mn, mn+STNMINOR-1, VBLK); 470 vdevgone(cmaj, mn, mn+STNMINOR-1, VCHR); 471 472 473 #if NRND > 0 474 /* Unhook the entropy source. */ 475 rnd_detach_source(&st->rnd_source); 476 #endif 477 478 return (0); 479 } 480 481 /* 482 * Use the inquiry routine in 'scsi_base' to get drive info so we can 483 * Further tailor our behaviour. 484 */ 485 static void 486 st_identify_drive(struct st_softc *st, struct scsipi_inquiry_pattern *inqbuf) 487 { 488 struct st_quirk_inquiry_pattern *finger; 489 int priority; 490 491 finger = (struct st_quirk_inquiry_pattern *)scsipi_inqmatch(inqbuf, 492 (caddr_t)st_quirk_patterns, 493 sizeof(st_quirk_patterns) / sizeof(st_quirk_patterns[0]), 494 sizeof(st_quirk_patterns[0]), &priority); 495 if (priority != 0) { 496 st->quirkdata = &finger->quirkdata; 497 st->drive_quirks = finger->quirkdata.quirks; 498 st->quirks = finger->quirkdata.quirks; /* start value */ 499 st->page_0_size = finger->quirkdata.page_0_size; 500 st_loadquirks(st); 501 } 502 } 503 504 /* 505 * initialise the subdevices to the default (QUIRK) state. 506 * this will remove any setting made by the system operator or previous 507 * operations. 508 */ 509 static void 510 st_loadquirks(struct st_softc *st) 511 { 512 int i; 513 struct modes *mode; 514 struct modes *mode2; 515 516 mode = st->quirkdata->modes; 517 mode2 = st->modes; 518 for (i = 0; i < 4; i++) { 519 memset(mode2, 0, sizeof(struct modes)); 520 st->modeflags[i] &= ~(BLKSIZE_SET_BY_QUIRK | 521 DENSITY_SET_BY_QUIRK | BLKSIZE_SET_BY_USER | 522 DENSITY_SET_BY_USER); 523 if ((mode->quirks | st->drive_quirks) & ST_Q_FORCE_BLKSIZE) { 524 mode2->blksize = mode->blksize; 525 st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; 526 } 527 if (mode->density) { 528 mode2->density = mode->density; 529 st->modeflags[i] |= DENSITY_SET_BY_QUIRK; 530 } 531 mode2->quirks |= mode->quirks; 532 mode++; 533 mode2++; 534 } 535 } 536 537 /* 538 * open the device. 539 */ 540 static int 541 stopen(dev_t dev, int flags, int mode, struct proc *p) 542 { 543 u_int stmode, dsty; 544 int error, sflags, unit, tries, ntries; 545 struct st_softc *st; 546 struct scsipi_periph *periph; 547 struct scsipi_adapter *adapt; 548 549 unit = STUNIT(dev); 550 if (unit >= st_cd.cd_ndevs) 551 return (ENXIO); 552 st = st_cd.cd_devs[unit]; 553 if (st == NULL) 554 return (ENXIO); 555 556 stmode = STMODE(dev); 557 dsty = STDSTY(dev); 558 559 periph = st->sc_periph; 560 adapt = periph->periph_channel->chan_adapter; 561 562 SC_DEBUG(periph, SCSIPI_DB1, ("open: dev=0x%x (unit %d (of %d))\n", dev, 563 unit, st_cd.cd_ndevs)); 564 565 566 /* 567 * Only allow one at a time 568 */ 569 if (periph->periph_flags & PERIPH_OPEN) { 570 printf("%s: already open\n", st->sc_dev.dv_xname); 571 return (EBUSY); 572 } 573 574 if ((error = scsipi_adapter_addref(adapt)) != 0) 575 return (error); 576 577 /* 578 * clear any latched errors. 579 */ 580 st->mt_resid = 0; 581 st->mt_erreg = 0; 582 st->asc = 0; 583 st->ascq = 0; 584 585 /* 586 * Catch any unit attention errors. Be silent about this 587 * unless we're already mounted. We ignore media change 588 * if we're in control mode or not mounted yet. 589 */ 590 if ((st->flags & ST_MOUNTED) == 0 || stmode == CTRL_MODE) { 591 #ifdef SCSIDEBUG 592 sflags = XS_CTL_IGNORE_MEDIA_CHANGE; 593 #else 594 sflags = XS_CTL_SILENT|XS_CTL_IGNORE_MEDIA_CHANGE; 595 #endif 596 } else 597 sflags = 0; 598 599 /* 600 * If we're already mounted or we aren't configured for 601 * a mount delay, only try a test unit ready once. Otherwise, 602 * try up to ST_MOUNT_DELAY times with a rest interval of 603 * one second between each try. 604 */ 605 606 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0) { 607 ntries = 1; 608 } else { 609 ntries = ST_MOUNT_DELAY; 610 } 611 612 for (error = tries = 0; tries < ntries; tries++) { 613 int slpintr, oflags; 614 615 /* 616 * If we had no error, or we're opening the control mode 617 * device, we jump out right away. 618 */ 619 620 error = scsipi_test_unit_ready(periph, sflags); 621 if (error == 0 || stmode == CTRL_MODE) { 622 break; 623 } 624 625 /* 626 * We had an error. 627 * 628 * If we're already mounted or we aren't configured for 629 * a mount delay, or the error isn't a NOT READY error, 630 * skip to the error exit now. 631 */ 632 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0 || 633 (st->mt_key != SKEY_NOT_READY)) { 634 goto bad; 635 } 636 637 /* 638 * clear any latched errors. 639 */ 640 st->mt_resid = 0; 641 st->mt_erreg = 0; 642 st->asc = 0; 643 st->ascq = 0; 644 645 /* 646 * Fake that we have the device open so 647 * we block other apps from getting in. 648 */ 649 650 oflags = periph->periph_flags; 651 periph->periph_flags |= PERIPH_OPEN; 652 653 slpintr = tsleep(&lbolt, PUSER|PCATCH, "stload", 0); 654 655 periph->periph_flags = oflags; /* restore flags */ 656 if (slpintr) { 657 goto bad; 658 } 659 } 660 661 662 /* 663 * If the mode is 3 (e.g. minor = 3,7,11,15) then the device has 664 * been opened to set defaults and perform other, usually non-I/O 665 * related, operations. In this case, do a quick check to see 666 * whether the unit actually had a tape loaded (this will be known 667 * as to whether or not we got a NOT READY for the above 668 * unit attention). If a tape is there, go do a mount sequence. 669 */ 670 if (stmode == CTRL_MODE && st->mt_key == SKEY_NOT_READY) { 671 periph->periph_flags |= PERIPH_OPEN; 672 return (0); 673 } 674 675 /* 676 * If we get this far and had an error set, that means we failed 677 * to pass the 'test unit ready' test for the non-controlmode device, 678 * so we bounce the open. 679 */ 680 681 if (error) 682 return (error); 683 684 /* 685 * Else, we're now committed to saying we're open. 686 */ 687 688 periph->periph_flags |= PERIPH_OPEN; /* unit attn are now errors */ 689 690 /* 691 * If it's a different mode, or if the media has been 692 * invalidated, unmount the tape from the previous 693 * session but continue with open processing 694 */ 695 if (st->last_dsty != dsty || 696 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 697 st_unmount(st, NOEJECT); 698 699 /* 700 * If we are not mounted, then we should start a new 701 * mount session. 702 */ 703 if (!(st->flags & ST_MOUNTED)) { 704 if ((error = st_mount_tape(dev, flags)) != 0) 705 goto bad; 706 st->last_dsty = dsty; 707 } 708 if (!(st->quirks & ST_Q_NOPREVENT)) { 709 scsipi_prevent(periph, PR_PREVENT, 710 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 711 } 712 713 SC_DEBUG(periph, SCSIPI_DB2, ("open complete\n")); 714 return (0); 715 716 bad: 717 st_unmount(st, NOEJECT); 718 scsipi_adapter_delref(adapt); 719 periph->periph_flags &= ~PERIPH_OPEN; 720 return (error); 721 } 722 723 /* 724 * close the device.. only called if we are the LAST 725 * occurence of an open device 726 */ 727 static int 728 stclose(dev_t dev, int flags, int mode, struct proc *p) 729 { 730 int stxx, error = 0; 731 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 732 struct scsipi_periph *periph = st->sc_periph; 733 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 734 735 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("closing\n")); 736 737 /* 738 * Make sure that a tape opened in write-only mode will have 739 * file marks written on it when closed, even if not written to. 740 * 741 * This is for SUN compatibility. Actually, the Sun way of 742 * things is to: 743 * 744 * only write filemarks if there are fmks to be written and 745 * - open for write (possibly read/write) 746 * - the last operation was a write 747 * or: 748 * - opened for wronly 749 * - no data was written (including filemarks) 750 */ 751 752 stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); 753 if (((flags & FWRITE) && stxx == ST_WRITTEN) || 754 ((flags & O_ACCMODE) == FWRITE && stxx == 0)) { 755 int nm; 756 error = st_check_eod(st, FALSE, &nm, 0); 757 } 758 759 /* 760 * Allow robots to eject tape if needed. 761 */ 762 scsipi_prevent(periph, PR_ALLOW, 763 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 764 765 switch (STMODE(dev)) { 766 case NORMAL_MODE: 767 st_unmount(st, NOEJECT); 768 break; 769 case NOREW_MODE: 770 case CTRL_MODE: 771 /* 772 * Leave mounted unless media seems to have been removed. 773 * 774 * Otherwise, if we're to terminate a tape with more than one 775 * filemark [ and because we're not rewinding here ], backspace 776 * one filemark so that later appends will see an unbroken 777 * sequence of: 778 * 779 * file - FMK - file - FMK ... file - FMK FMK (EOM) 780 */ 781 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 782 st_unmount(st, NOEJECT); 783 } else if (error == 0) { 784 /* 785 * ST_WRITTEN was preserved from above. 786 * 787 * All we need to know here is: 788 * 789 * Were we writing this tape and was the last 790 * operation a write? 791 * 792 * Are there supposed to be 2FM at EOD? 793 * 794 * If both statements are true, then we backspace 795 * one filemark. 796 */ 797 stxx |= (st->flags & ST_2FM_AT_EOD); 798 if ((flags & FWRITE) != 0 && 799 (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { 800 error = st_space(st, -1, SP_FILEMARKS, 0); 801 } 802 } 803 break; 804 case EJECT_MODE: 805 st_unmount(st, EJECT); 806 break; 807 } 808 809 scsipi_wait_drain(periph); 810 811 scsipi_adapter_delref(adapt); 812 periph->periph_flags &= ~PERIPH_OPEN; 813 814 return (error); 815 } 816 817 /* 818 * Start a new mount session. 819 * Copy in all the default parameters from the selected device mode. 820 * and try guess any that seem to be defaulted. 821 */ 822 static int 823 st_mount_tape(dev_t dev, int flags) 824 { 825 int unit; 826 u_int dsty; 827 struct st_softc *st; 828 struct scsipi_periph *periph; 829 int error = 0; 830 831 unit = STUNIT(dev); 832 dsty = STDSTY(dev); 833 st = st_cd.cd_devs[unit]; 834 periph = st->sc_periph; 835 836 if (st->flags & ST_MOUNTED) 837 return (0); 838 839 SC_DEBUG(periph, SCSIPI_DB1, ("mounting\n ")); 840 st->flags |= ST_NEW_MOUNT; 841 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 842 /* 843 * If the media is new, then make sure we give it a chance to 844 * to do a 'load' instruction. (We assume it is new.) 845 */ 846 if ((error = st_load(st, LD_LOAD, XS_CTL_SILENT)) != 0) 847 return (error); 848 /* 849 * Throw another dummy instruction to catch 850 * 'Unit attention' errors. Many drives give 851 * these after doing a Load instruction (with 852 * the MEDIUM MAY HAVE CHANGED asc/ascq). 853 */ 854 scsipi_test_unit_ready(periph, XS_CTL_SILENT); /* XXX */ 855 856 /* 857 * Some devices can't tell you much until they have been 858 * asked to look at the media. This quirk does this. 859 */ 860 if (st->quirks & ST_Q_SENSE_HELP) 861 if ((error = st_touch_tape(st)) != 0) 862 return (error); 863 /* 864 * Load the physical device parameters 865 * loads: blkmin, blkmax 866 */ 867 if ((error = st->ops(st, ST_OPS_RBL, 0)) != 0) 868 return (error); 869 /* 870 * Load the media dependent parameters 871 * includes: media_blksize,media_density,numblks 872 * As we have a tape in, it should be reflected here. 873 * If not you may need the "quirk" above. 874 */ 875 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 876 return (error); 877 /* 878 * If we have gained a permanent density from somewhere, 879 * then use it in preference to the one supplied by 880 * default by the driver. 881 */ 882 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 883 st->density = st->modes[dsty].density; 884 else 885 st->density = st->media_density; 886 /* 887 * If we have gained a permanent blocksize 888 * then use it in preference to the one supplied by 889 * default by the driver. 890 */ 891 st->flags &= ~ST_FIXEDBLOCKS; 892 if (st->modeflags[dsty] & 893 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 894 st->blksize = st->modes[dsty].blksize; 895 if (st->blksize) 896 st->flags |= ST_FIXEDBLOCKS; 897 } else { 898 if ((error = st_decide_mode(st, FALSE)) != 0) 899 return (error); 900 } 901 if ((error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 902 /* ATAPI will return ENODEV for this, and this may be OK */ 903 if (error != ENODEV) { 904 printf("%s: cannot set selected mode\n", 905 st->sc_dev.dv_xname); 906 return (error); 907 } 908 } 909 st->flags &= ~ST_NEW_MOUNT; 910 st->flags |= ST_MOUNTED; 911 periph->periph_flags |= PERIPH_MEDIA_LOADED; /* move earlier? */ 912 st->blkno = st->fileno = (daddr_t) 0; 913 return (0); 914 } 915 916 /* 917 * End the present mount session. 918 * Rewind, and optionally eject the tape. 919 * Reset various flags to indicate that all new 920 * operations require another mount operation 921 */ 922 static void 923 st_unmount(struct st_softc *st, boolean eject) 924 { 925 struct scsipi_periph *periph = st->sc_periph; 926 int nmarks; 927 928 if ((st->flags & ST_MOUNTED) == 0) 929 return; 930 SC_DEBUG(periph, SCSIPI_DB1, ("unmounting\n")); 931 st_check_eod(st, FALSE, &nmarks, XS_CTL_IGNORE_NOT_READY); 932 st_rewind(st, 0, XS_CTL_IGNORE_NOT_READY); 933 934 /* 935 * Section 9.3.3 of the SCSI specs states that a device shall return 936 * the density value specified in the last succesfull MODE SELECT 937 * after an unload operation, in case it is not able to 938 * automatically determine the density of the new medium. 939 * 940 * So we instruct the device to use the default density, which will 941 * prevent the use of stale density values (in particular, 942 * in st_touch_tape(). 943 */ 944 st->density = 0; 945 if (st->ops(st, ST_OPS_MODESELECT, 0) != 0) { 946 printf("%s: WARNING: cannot revert to default density\n", 947 st->sc_dev.dv_xname); 948 } 949 950 if (eject) { 951 if (!(st->quirks & ST_Q_NOPREVENT)) { 952 scsipi_prevent(periph, PR_ALLOW, 953 XS_CTL_IGNORE_ILLEGAL_REQUEST | 954 XS_CTL_IGNORE_NOT_READY); 955 } 956 st_load(st, LD_UNLOAD, XS_CTL_IGNORE_NOT_READY); 957 st->blkno = st->fileno = (daddr_t) -1; 958 } else { 959 st->blkno = st->fileno = (daddr_t) 0; 960 } 961 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 962 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 963 } 964 965 /* 966 * Given all we know about the device, media, mode, 'quirks' and 967 * initial operation, make a decision as to how we should be set 968 * to run (regarding blocking and EOD marks) 969 */ 970 int 971 st_decide_mode(struct st_softc *st, boolean first_read) 972 { 973 974 SC_DEBUG(st->sc_periph, SCSIPI_DB2, ("starting block mode decision\n")); 975 976 /* 977 * If the drive can only handle fixed-length blocks and only at 978 * one size, perhaps we should just do that. 979 */ 980 if (st->blkmin && (st->blkmin == st->blkmax)) { 981 st->flags |= ST_FIXEDBLOCKS; 982 st->blksize = st->blkmin; 983 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 984 ("blkmin == blkmax of %d\n", st->blkmin)); 985 goto done; 986 } 987 /* 988 * If the tape density mandates (or even suggests) use of fixed 989 * or variable-length blocks, comply. 990 */ 991 switch (st->density) { 992 case HALFINCH_800: 993 case HALFINCH_1600: 994 case HALFINCH_6250: 995 case DDS: 996 st->flags &= ~ST_FIXEDBLOCKS; 997 st->blksize = 0; 998 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 999 ("density specified variable\n")); 1000 goto done; 1001 case QIC_11: 1002 case QIC_24: 1003 case QIC_120: 1004 case QIC_150: 1005 case QIC_525: 1006 case QIC_1320: 1007 case QIC_3095: 1008 case QIC_3220: 1009 st->flags |= ST_FIXEDBLOCKS; 1010 if (st->media_blksize > 0) 1011 st->blksize = st->media_blksize; 1012 else 1013 st->blksize = DEF_FIXED_BSIZE; 1014 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1015 ("density specified fixed\n")); 1016 goto done; 1017 } 1018 /* 1019 * If we're about to read the tape, perhaps we should choose 1020 * fixed or variable-length blocks and block size according to 1021 * what the drive found on the tape. 1022 */ 1023 if (first_read && 1024 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 1025 (st->media_blksize == DEF_FIXED_BSIZE) || 1026 (st->media_blksize == 1024))) { 1027 if (st->media_blksize > 0) 1028 st->flags |= ST_FIXEDBLOCKS; 1029 else 1030 st->flags &= ~ST_FIXEDBLOCKS; 1031 st->blksize = st->media_blksize; 1032 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1033 ("Used media_blksize of %d\n", st->media_blksize)); 1034 goto done; 1035 } 1036 /* 1037 * We're getting no hints from any direction. Choose variable- 1038 * length blocks arbitrarily. 1039 */ 1040 st->flags &= ~ST_FIXEDBLOCKS; 1041 st->blksize = 0; 1042 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1043 ("Give up and default to variable mode\n")); 1044 1045 done: 1046 /* 1047 * Decide whether or not to write two file marks to signify end- 1048 * of-data. Make the decision as a function of density. If 1049 * the decision is not to use a second file mark, the SCSI BLANK 1050 * CHECK condition code will be recognized as end-of-data when 1051 * first read. 1052 * (I think this should be a by-product of fixed/variable..julian) 1053 */ 1054 switch (st->density) { 1055 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 1056 case QIC_11: 1057 case QIC_24: 1058 case QIC_120: 1059 case QIC_150: 1060 case QIC_525: 1061 case QIC_1320: 1062 case QIC_3095: 1063 case QIC_3220: 1064 st->flags &= ~ST_2FM_AT_EOD; 1065 break; 1066 default: 1067 st->flags |= ST_2FM_AT_EOD; 1068 } 1069 return (0); 1070 } 1071 1072 /* 1073 * Actually translate the requested transfer into 1074 * one the physical driver can understand 1075 * The transfer is described by a buf and will include 1076 * only one physical transfer. 1077 */ 1078 static void 1079 ststrategy(struct buf *bp) 1080 { 1081 struct st_softc *st = st_cd.cd_devs[STUNIT(bp->b_dev)]; 1082 int s; 1083 1084 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1085 ("ststrategy %d bytes @ blk %" PRId64 "\n", bp->b_bcount, bp->b_blkno)); 1086 /* 1087 * If it's a null transfer, return immediatly 1088 */ 1089 if (bp->b_bcount == 0) 1090 goto done; 1091 1092 /* If offset is negative, error */ 1093 if (bp->b_blkno < 0) { 1094 bp->b_error = EINVAL; 1095 goto bad; 1096 } 1097 1098 /* 1099 * Odd sized request on fixed drives are verboten 1100 */ 1101 if (st->flags & ST_FIXEDBLOCKS) { 1102 if (bp->b_bcount % st->blksize) { 1103 printf("%s: bad request, must be multiple of %d\n", 1104 st->sc_dev.dv_xname, st->blksize); 1105 bp->b_error = EIO; 1106 goto bad; 1107 } 1108 } 1109 /* 1110 * as are out-of-range requests on variable drives. 1111 */ 1112 else if (bp->b_bcount < st->blkmin || 1113 (st->blkmax && bp->b_bcount > st->blkmax)) { 1114 printf("%s: bad request, must be between %d and %d\n", 1115 st->sc_dev.dv_xname, st->blkmin, st->blkmax); 1116 bp->b_error = EIO; 1117 goto bad; 1118 } 1119 s = splbio(); 1120 1121 /* 1122 * Place it in the queue of activities for this tape 1123 * at the end (a bit silly because we only have on user.. 1124 * (but it could fork())) 1125 */ 1126 BUFQ_PUT(&st->buf_queue, bp); 1127 1128 /* 1129 * Tell the device to get going on the transfer if it's 1130 * not doing anything, otherwise just wait for completion 1131 * (All a bit silly if we're only allowing 1 open but..) 1132 */ 1133 ststart(st->sc_periph); 1134 1135 splx(s); 1136 return; 1137 bad: 1138 bp->b_flags |= B_ERROR; 1139 done: 1140 /* 1141 * Correctly set the buf to indicate a completed xfer 1142 */ 1143 bp->b_resid = bp->b_bcount; 1144 biodone(bp); 1145 return; 1146 } 1147 1148 /* 1149 * ststart looks to see if there is a buf waiting for the device 1150 * and that the device is not already busy. If both are true, 1151 * It dequeues the buf and creates a scsi command to perform the 1152 * transfer required. The transfer request will call scsipi_done 1153 * on completion, which will in turn call this routine again 1154 * so that the next queued transfer is performed. 1155 * The bufs are queued by the strategy routine (ststrategy) 1156 * 1157 * This routine is also called after other non-queued requests 1158 * have been made of the scsi driver, to ensure that the queue 1159 * continues to be drained. 1160 * ststart() is called at splbio 1161 */ 1162 static void 1163 ststart(struct scsipi_periph *periph) 1164 { 1165 struct st_softc *st = (void *)periph->periph_dev; 1166 struct buf *bp; 1167 struct scsi_rw_tape cmd; 1168 struct scsipi_xfer *xs; 1169 int flags, error; 1170 1171 SC_DEBUG(periph, SCSIPI_DB2, ("ststart ")); 1172 /* 1173 * See if there is a buf to do and we are not already 1174 * doing one 1175 */ 1176 while (periph->periph_active < periph->periph_openings) { 1177 /* if a special awaits, let it proceed first */ 1178 if (periph->periph_flags & PERIPH_WAITING) { 1179 periph->periph_flags &= ~PERIPH_WAITING; 1180 wakeup((caddr_t)periph); 1181 return; 1182 } 1183 1184 /* 1185 * If the device has been unmounted by the user 1186 * then throw away all requests until done. 1187 */ 1188 if (__predict_false((st->flags & ST_MOUNTED) == 0 || 1189 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0)) { 1190 if ((bp = BUFQ_GET(&st->buf_queue)) != NULL) { 1191 /* make sure that one implies the other.. */ 1192 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 1193 bp->b_flags |= B_ERROR; 1194 bp->b_error = EIO; 1195 bp->b_resid = bp->b_bcount; 1196 biodone(bp); 1197 continue; 1198 } else { 1199 return; 1200 } 1201 } 1202 1203 if ((bp = BUFQ_PEEK(&st->buf_queue)) == NULL) 1204 return; 1205 1206 /* 1207 * only FIXEDBLOCK devices have pending I/O or space operations. 1208 */ 1209 if (st->flags & ST_FIXEDBLOCKS) { 1210 /* 1211 * If we are at a filemark but have not reported it yet 1212 * then we should report it now 1213 */ 1214 if (st->flags & ST_AT_FILEMARK) { 1215 if ((bp->b_flags & B_READ) == B_WRITE) { 1216 /* 1217 * Handling of ST_AT_FILEMARK in 1218 * st_space will fill in the right file 1219 * mark count. 1220 * Back up over filemark 1221 */ 1222 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1223 BUFQ_GET(&st->buf_queue); 1224 bp->b_flags |= B_ERROR; 1225 bp->b_error = EIO; 1226 biodone(bp); 1227 continue; 1228 } 1229 } else { 1230 BUFQ_GET(&st->buf_queue); 1231 bp->b_resid = bp->b_bcount; 1232 bp->b_error = 0; 1233 bp->b_flags &= ~B_ERROR; 1234 st->flags &= ~ST_AT_FILEMARK; 1235 biodone(bp); 1236 continue; /* seek more work */ 1237 } 1238 } 1239 } 1240 /* 1241 * If we are at EOM but have not reported it 1242 * yet then we should report it now. 1243 */ 1244 if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { 1245 BUFQ_GET(&st->buf_queue); 1246 bp->b_resid = bp->b_bcount; 1247 if (st->flags & ST_EIO_PENDING) { 1248 bp->b_error = EIO; 1249 bp->b_flags |= B_ERROR; 1250 } 1251 st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); 1252 biodone(bp); 1253 continue; /* seek more work */ 1254 } 1255 1256 /* 1257 * Fill out the scsi command 1258 */ 1259 memset(&cmd, 0, sizeof(cmd)); 1260 flags = XS_CTL_NOSLEEP | XS_CTL_ASYNC; 1261 if ((bp->b_flags & B_READ) == B_WRITE) { 1262 cmd.opcode = WRITE; 1263 st->flags &= ~ST_FM_WRITTEN; 1264 flags |= XS_CTL_DATA_OUT; 1265 } else { 1266 cmd.opcode = READ; 1267 flags |= XS_CTL_DATA_IN; 1268 } 1269 1270 /* 1271 * Handle "fixed-block-mode" tape drives by using the 1272 * block count instead of the length. 1273 */ 1274 if (st->flags & ST_FIXEDBLOCKS) { 1275 cmd.byte2 |= SRW_FIXED; 1276 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1277 } else 1278 _lto3b(bp->b_bcount, cmd.len); 1279 1280 /* 1281 * Clear 'position updated' indicator 1282 */ 1283 st->flags &= ~ST_POSUPDATED; 1284 1285 /* 1286 * go ask the adapter to do all this for us 1287 */ 1288 xs = scsipi_make_xs(periph, 1289 (struct scsipi_generic *)&cmd, sizeof(cmd), 1290 (u_char *)bp->b_data, bp->b_bcount, 1291 0, ST_IO_TIME, bp, flags); 1292 if (__predict_false(xs == NULL)) { 1293 /* 1294 * out of memory. Keep this buffer in the queue, and 1295 * retry later. 1296 */ 1297 callout_reset(&st->sc_callout, hz / 2, strestart, 1298 periph); 1299 return; 1300 } 1301 /* 1302 * need to dequeue the buffer before queuing the command, 1303 * because cdstart may be called recursively from the 1304 * HBA driver 1305 */ 1306 #ifdef DIAGNOSTIC 1307 if (BUFQ_GET(&st->buf_queue) != bp) 1308 panic("ststart(): dequeued wrong buf"); 1309 #else 1310 BUFQ_GET(&st->buf_queue); 1311 #endif 1312 error = scsipi_execute_xs(xs); 1313 /* with a scsipi_xfer preallocated, scsipi_command can't fail */ 1314 KASSERT(error == 0); 1315 } /* go back and see if we can cram more work in.. */ 1316 } 1317 1318 static void 1319 strestart(void *v) 1320 { 1321 int s = splbio(); 1322 ststart((struct scsipi_periph *)v); 1323 splx(s); 1324 } 1325 1326 1327 static void 1328 stdone(struct scsipi_xfer *xs, int error) 1329 { 1330 struct st_softc *st = (void *)xs->xs_periph->periph_dev; 1331 struct buf *bp = xs->bp; 1332 1333 if (bp) { 1334 bp->b_error = error; 1335 bp->b_resid = xs->resid; 1336 if (error) 1337 bp->b_flags |= B_ERROR; 1338 1339 if ((bp->b_flags & B_READ) == B_WRITE) 1340 st->flags |= ST_WRITTEN; 1341 else 1342 st->flags &= ~ST_WRITTEN; 1343 #if NRND > 0 1344 rnd_add_uint32(&st->rnd_source, bp->b_blkno); 1345 #endif 1346 1347 if ((st->flags & ST_POSUPDATED) == 0) { 1348 if (error) { 1349 st->fileno = st->blkno = -1; 1350 } else if (st->blkno != -1) { 1351 if (st->flags & ST_FIXEDBLOCKS) 1352 st->blkno += 1353 (bp->b_bcount / st->blksize); 1354 else 1355 st->blkno++; 1356 } 1357 } 1358 1359 biodone(bp); 1360 } 1361 } 1362 1363 static int 1364 stread(dev_t dev, struct uio *uio, int iomode) 1365 { 1366 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1367 1368 return (physio(ststrategy, NULL, dev, B_READ, 1369 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1370 } 1371 1372 static int 1373 stwrite(dev_t dev, struct uio *uio, int iomode) 1374 { 1375 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1376 1377 return (physio(ststrategy, NULL, dev, B_WRITE, 1378 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1379 } 1380 1381 /* 1382 * Perform special action on behalf of the user; 1383 * knows about the internals of this device 1384 */ 1385 static int 1386 stioctl(dev_t dev, u_long cmd, caddr_t arg, int flag, struct proc *p) 1387 { 1388 int error = 0; 1389 int unit; 1390 int number, nmarks, dsty; 1391 int flags; 1392 struct st_softc *st; 1393 int hold_blksize; 1394 u_int8_t hold_density; 1395 struct mtop *mt = (struct mtop *) arg; 1396 1397 /* 1398 * Find the device that the user is talking about 1399 */ 1400 flags = 0; /* give error messages, act on errors etc. */ 1401 unit = STUNIT(dev); 1402 dsty = STDSTY(dev); 1403 st = st_cd.cd_devs[unit]; 1404 hold_blksize = st->blksize; 1405 hold_density = st->density; 1406 1407 switch ((u_int) cmd) { 1408 1409 case MTIOCGET: { 1410 struct mtget *g = (struct mtget *) arg; 1411 /* 1412 * (to get the current state of READONLY) 1413 */ 1414 error = st->ops(st, ST_OPS_MODESENSE, XS_CTL_SILENT); 1415 if (error) { 1416 /* 1417 * Ignore the error if in control mode; 1418 * this is mandated by st(4). 1419 */ 1420 if (STMODE(dev) != CTRL_MODE) 1421 break; 1422 error = 0; 1423 } 1424 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("[ioctl: get status]\n")); 1425 memset(g, 0, sizeof(struct mtget)); 1426 g->mt_type = 0x7; /* Ultrix compat *//*? */ 1427 g->mt_blksiz = st->blksize; 1428 g->mt_density = st->density; 1429 g->mt_mblksiz[0] = st->modes[0].blksize; 1430 g->mt_mblksiz[1] = st->modes[1].blksize; 1431 g->mt_mblksiz[2] = st->modes[2].blksize; 1432 g->mt_mblksiz[3] = st->modes[3].blksize; 1433 g->mt_mdensity[0] = st->modes[0].density; 1434 g->mt_mdensity[1] = st->modes[1].density; 1435 g->mt_mdensity[2] = st->modes[2].density; 1436 g->mt_mdensity[3] = st->modes[3].density; 1437 g->mt_fileno = st->fileno; 1438 g->mt_blkno = st->blkno; 1439 if (st->flags & ST_READONLY) 1440 g->mt_dsreg |= MT_DS_RDONLY; 1441 if (st->flags & ST_MOUNTED) 1442 g->mt_dsreg |= MT_DS_MOUNTED; 1443 g->mt_resid = st->mt_resid; 1444 g->mt_erreg = st->mt_erreg; 1445 /* 1446 * clear latched errors. 1447 */ 1448 st->mt_resid = 0; 1449 st->mt_erreg = 0; 1450 st->asc = 0; 1451 st->ascq = 0; 1452 break; 1453 } 1454 case MTIOCTOP: { 1455 1456 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1457 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1458 mt->mt_count)); 1459 1460 /* compat: in U*x it is a short */ 1461 number = mt->mt_count; 1462 switch ((short) (mt->mt_op)) { 1463 case MTWEOF: /* write an end-of-file record */ 1464 error = st_write_filemarks(st, number, flags); 1465 break; 1466 case MTBSF: /* backward space file */ 1467 number = -number; 1468 case MTFSF: /* forward space file */ 1469 error = st_check_eod(st, FALSE, &nmarks, flags); 1470 if (!error) 1471 error = st_space(st, number - nmarks, 1472 SP_FILEMARKS, flags); 1473 break; 1474 case MTBSR: /* backward space record */ 1475 number = -number; 1476 case MTFSR: /* forward space record */ 1477 error = st_check_eod(st, TRUE, &nmarks, flags); 1478 if (!error) 1479 error = st_space(st, number, SP_BLKS, flags); 1480 break; 1481 case MTREW: /* rewind */ 1482 error = st_rewind(st, 0, flags); 1483 break; 1484 case MTOFFL: /* rewind and put the drive offline */ 1485 st_unmount(st, EJECT); 1486 break; 1487 case MTNOP: /* no operation, sets status only */ 1488 break; 1489 case MTRETEN: /* retension the tape */ 1490 error = st_load(st, LD_RETENSION, flags); 1491 if (!error) 1492 error = st_load(st, LD_LOAD, flags); 1493 break; 1494 case MTEOM: /* forward space to end of media */ 1495 error = st_check_eod(st, FALSE, &nmarks, flags); 1496 if (!error) 1497 error = st_space(st, 1, SP_EOM, flags); 1498 break; 1499 case MTCACHE: /* enable controller cache */ 1500 st->flags &= ~ST_DONTBUFFER; 1501 goto try_new_value; 1502 case MTNOCACHE: /* disable controller cache */ 1503 st->flags |= ST_DONTBUFFER; 1504 goto try_new_value; 1505 case MTERASE: /* erase volume */ 1506 error = st_erase(st, number, flags); 1507 break; 1508 case MTSETBSIZ: /* Set block size for device */ 1509 #ifdef NOTYET 1510 if (!(st->flags & ST_NEW_MOUNT)) { 1511 uprintf("re-mount tape before changing blocksize"); 1512 error = EINVAL; 1513 break; 1514 } 1515 #endif 1516 if (number == 0) 1517 st->flags &= ~ST_FIXEDBLOCKS; 1518 else { 1519 if ((st->blkmin || st->blkmax) && 1520 (number < st->blkmin || 1521 number > st->blkmax)) { 1522 error = EINVAL; 1523 break; 1524 } 1525 st->flags |= ST_FIXEDBLOCKS; 1526 } 1527 st->blksize = number; 1528 st->flags |= ST_BLOCK_SET; /*XXX */ 1529 goto try_new_value; 1530 1531 case MTSETDNSTY: /* Set density for device and mode */ 1532 /* 1533 * Any number >= 0 and <= 0xff is legal. Numbers 1534 * above 0x80 are 'vendor unique'. 1535 */ 1536 if (number < 0 || number > 255) { 1537 error = EINVAL; 1538 break; 1539 } else 1540 st->density = number; 1541 goto try_new_value; 1542 1543 case MTCMPRESS: 1544 error = st->ops(st, (number == 0) ? 1545 ST_OPS_CMPRSS_OFF : ST_OPS_CMPRSS_ON, 1546 XS_CTL_SILENT); 1547 break; 1548 1549 case MTEWARN: 1550 if (number) 1551 st->flags |= ST_EARLYWARN; 1552 else 1553 st->flags &= ~ST_EARLYWARN; 1554 break; 1555 1556 default: 1557 error = EINVAL; 1558 } 1559 break; 1560 } 1561 case MTIOCIEOT: 1562 case MTIOCEEOT: 1563 break; 1564 1565 case MTIOCRDSPOS: 1566 error = st_rdpos(st, 0, (u_int32_t *) arg); 1567 break; 1568 1569 case MTIOCRDHPOS: 1570 error = st_rdpos(st, 1, (u_int32_t *) arg); 1571 break; 1572 1573 case MTIOCSLOCATE: 1574 error = st_setpos(st, 0, (u_int32_t *) arg); 1575 break; 1576 1577 case MTIOCHLOCATE: 1578 error = st_setpos(st, 1, (u_int32_t *) arg); 1579 break; 1580 1581 1582 default: 1583 error = scsipi_do_ioctl(st->sc_periph, dev, cmd, arg, 1584 flag, p); 1585 break; 1586 } 1587 return (error); 1588 /*-----------------------------*/ 1589 try_new_value: 1590 /* 1591 * Check that the mode being asked for is aggreeable to the 1592 * drive. If not, put it back the way it was. 1593 * 1594 * If in control mode, we can make (persistent) mode changes 1595 * even if no medium is loaded (see st(4)). 1596 */ 1597 if ((STMODE(dev) != CTRL_MODE || (st->flags & ST_MOUNTED) != 0) && 1598 (error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 1599 /* put it back as it was */ 1600 printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); 1601 st->density = hold_density; 1602 st->blksize = hold_blksize; 1603 if (st->blksize) 1604 st->flags |= ST_FIXEDBLOCKS; 1605 else 1606 st->flags &= ~ST_FIXEDBLOCKS; 1607 return (error); 1608 } 1609 /* 1610 * As the drive liked it, if we are setting a new default, 1611 * set it into the structures as such. 1612 * 1613 * The means for deciding this are not finalised yet- but 1614 * if the device was opened in Control Mode, the values 1615 * are persistent now across mounts. 1616 */ 1617 if (STMODE(dev) == CTRL_MODE) { 1618 switch ((short) (mt->mt_op)) { 1619 case MTSETBSIZ: 1620 st->modes[dsty].blksize = st->blksize; 1621 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1622 break; 1623 case MTSETDNSTY: 1624 st->modes[dsty].density = st->density; 1625 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1626 break; 1627 } 1628 } 1629 return (0); 1630 } 1631 1632 /* 1633 * Do a synchronous read. 1634 */ 1635 static int 1636 st_read(struct st_softc *st, char *buf, int size, int flags) 1637 { 1638 struct scsi_rw_tape cmd; 1639 1640 /* 1641 * If it's a null transfer, return immediatly 1642 */ 1643 if (size == 0) 1644 return (0); 1645 memset(&cmd, 0, sizeof(cmd)); 1646 cmd.opcode = READ; 1647 if (st->flags & ST_FIXEDBLOCKS) { 1648 cmd.byte2 |= SRW_FIXED; 1649 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1650 cmd.len); 1651 } else 1652 _lto3b(size, cmd.len); 1653 return (scsipi_command(st->sc_periph, 1654 (void *)&cmd, sizeof(cmd), (void *)buf, size, 0, ST_IO_TIME, NULL, 1655 flags | XS_CTL_DATA_IN)); 1656 } 1657 1658 /* 1659 * issue an erase command 1660 */ 1661 static int 1662 st_erase(struct st_softc *st, int full, int flags) 1663 { 1664 int tmo; 1665 struct scsi_erase cmd; 1666 1667 /* 1668 * Full erase means set LONG bit in erase command, which asks 1669 * the drive to erase the entire unit. Without this bit, we're 1670 * asking the drive to write an erase gap. 1671 */ 1672 memset(&cmd, 0, sizeof(cmd)); 1673 cmd.opcode = ERASE; 1674 if (full) { 1675 cmd.byte2 = SE_LONG; 1676 tmo = ST_SPC_TIME; 1677 } else { 1678 tmo = ST_IO_TIME; 1679 } 1680 1681 /* 1682 * XXX We always do this asynchronously, for now, unless the device 1683 * has the ST_Q_ERASE_NOIMM quirk. How long should we wait if we 1684 * want to (eventually) to it synchronously? 1685 */ 1686 if ((st->quirks & ST_Q_ERASE_NOIMM) == 0) 1687 cmd.byte2 |= SE_IMMED; 1688 1689 return (scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1690 ST_RETRIES, tmo, NULL, flags)); 1691 } 1692 1693 /* 1694 * skip N blocks/filemarks/seq filemarks/eom 1695 */ 1696 static int 1697 st_space(struct st_softc *st, int number, u_int what, int flags) 1698 { 1699 struct scsi_space cmd; 1700 int error; 1701 1702 switch (what) { 1703 case SP_BLKS: 1704 if (st->flags & ST_PER_ACTION) { 1705 if (number > 0) { 1706 st->flags &= ~ST_PER_ACTION; 1707 return (EIO); 1708 } else if (number < 0) { 1709 if (st->flags & ST_AT_FILEMARK) { 1710 /* 1711 * Handling of ST_AT_FILEMARK 1712 * in st_space will fill in the 1713 * right file mark count. 1714 */ 1715 error = st_space(st, 0, SP_FILEMARKS, 1716 flags); 1717 if (error) 1718 return (error); 1719 } 1720 if (st->flags & ST_BLANK_READ) { 1721 st->flags &= ~ST_BLANK_READ; 1722 return (EIO); 1723 } 1724 st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); 1725 } 1726 } 1727 break; 1728 case SP_FILEMARKS: 1729 if (st->flags & ST_EIO_PENDING) { 1730 if (number > 0) { 1731 /* pretend we just discovered the error */ 1732 st->flags &= ~ST_EIO_PENDING; 1733 return (EIO); 1734 } else if (number < 0) { 1735 /* back away from the error */ 1736 st->flags &= ~ST_EIO_PENDING; 1737 } 1738 } 1739 if (st->flags & ST_AT_FILEMARK) { 1740 st->flags &= ~ST_AT_FILEMARK; 1741 number--; 1742 } 1743 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 1744 /* back away from unwritten tape */ 1745 st->flags &= ~ST_BLANK_READ; 1746 number++; /* XXX dubious */ 1747 } 1748 break; 1749 case SP_EOM: 1750 if (st->flags & ST_EOM_PENDING) { 1751 /* we're already there */ 1752 st->flags &= ~ST_EOM_PENDING; 1753 return (0); 1754 } 1755 if (st->flags & ST_EIO_PENDING) { 1756 /* pretend we just discovered the error */ 1757 st->flags &= ~ST_EIO_PENDING; 1758 return (EIO); 1759 } 1760 if (st->flags & ST_AT_FILEMARK) 1761 st->flags &= ~ST_AT_FILEMARK; 1762 break; 1763 } 1764 if (number == 0) 1765 return (0); 1766 1767 memset(&cmd, 0, sizeof(cmd)); 1768 cmd.opcode = SPACE; 1769 cmd.byte2 = what; 1770 _lto3b(number, cmd.number); 1771 1772 st->flags &= ~ST_POSUPDATED; 1773 st->last_ctl_resid = 0; 1774 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1775 0, ST_SPC_TIME, NULL, flags); 1776 1777 if (error == 0 && (st->flags & ST_POSUPDATED) == 0) { 1778 number = number - st->last_ctl_resid; 1779 if (what == SP_BLKS) { 1780 if (st->blkno != -1) { 1781 st->blkno += number; 1782 } 1783 } else if (what == SP_FILEMARKS) { 1784 if (st->fileno != -1) { 1785 st->fileno += number; 1786 if (number > 0) { 1787 st->blkno = 0; 1788 } else if (number < 0) { 1789 st->blkno = -1; 1790 } 1791 } 1792 } else if (what == SP_EOM) { 1793 /* 1794 * This loses us relative position. 1795 */ 1796 st->fileno = st->blkno = -1; 1797 } 1798 } 1799 return (error); 1800 } 1801 1802 /* 1803 * write N filemarks 1804 */ 1805 static int 1806 st_write_filemarks(struct st_softc *st, int number, int flags) 1807 { 1808 int error; 1809 struct scsi_write_filemarks cmd; 1810 1811 /* 1812 * It's hard to write a negative number of file marks. 1813 * Don't try. 1814 */ 1815 if (number < 0) 1816 return (EINVAL); 1817 switch (number) { 1818 case 0: /* really a command to sync the drive's buffers */ 1819 break; 1820 case 1: 1821 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 1822 st->flags &= ~ST_WRITTEN; 1823 else 1824 st->flags |= ST_FM_WRITTEN; 1825 st->flags &= ~ST_PER_ACTION; 1826 break; 1827 default: 1828 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 1829 } 1830 1831 memset(&cmd, 0, sizeof(cmd)); 1832 cmd.opcode = WRITE_FILEMARKS; 1833 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1834 cmd.byte2 = SR_IMMED; 1835 /* 1836 * The ATAPI Onstream DI-30 doesn't support writing filemarks, but 1837 * WRITE_FILEMARKS is still used to flush the buffer 1838 */ 1839 if ((st->quirks & ST_Q_NOFILEMARKS) == 0) 1840 _lto3b(number, cmd.number); 1841 1842 /* XXX WE NEED TO BE ABLE TO GET A RESIDIUAL XXX */ 1843 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1844 0, ST_IO_TIME * 4, NULL, flags); 1845 if (error == 0 && st->fileno != -1) { 1846 st->fileno += number; 1847 } 1848 return (error); 1849 } 1850 1851 /* 1852 * Make sure the right number of file marks is on tape if the 1853 * tape has been written. If the position argument is true, 1854 * leave the tape positioned where it was originally. 1855 * 1856 * nmarks returns the number of marks to skip (or, if position 1857 * true, which were skipped) to get back original position. 1858 */ 1859 static int 1860 st_check_eod(struct st_softc *st, boolean position, int *nmarks, int flags) 1861 { 1862 int error; 1863 1864 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 1865 default: 1866 *nmarks = 0; 1867 return (0); 1868 case ST_WRITTEN: 1869 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 1870 *nmarks = 1; 1871 break; 1872 case ST_WRITTEN | ST_2FM_AT_EOD: 1873 *nmarks = 2; 1874 } 1875 error = st_write_filemarks(st, *nmarks, flags); 1876 if (position && !error) 1877 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 1878 return (error); 1879 } 1880 1881 /* 1882 * load/unload/retension 1883 */ 1884 static int 1885 st_load(struct st_softc *st, u_int type, int flags) 1886 { 1887 int error; 1888 struct scsi_load cmd; 1889 1890 if (type != LD_LOAD) { 1891 int nmarks; 1892 1893 error = st_check_eod(st, FALSE, &nmarks, flags); 1894 if (error) { 1895 printf("%s: failed to write closing filemarks at " 1896 "unload, errno=%d\n", st->sc_dev.dv_xname, error); 1897 return (error); 1898 } 1899 } 1900 if (st->quirks & ST_Q_IGNORE_LOADS) { 1901 if (type == LD_LOAD) { 1902 /* 1903 * If we ignore loads, at least we should try a rewind. 1904 */ 1905 return st_rewind(st, 0, flags); 1906 } 1907 /* otherwise, we should do what's asked of us */ 1908 } 1909 1910 memset(&cmd, 0, sizeof(cmd)); 1911 cmd.opcode = LOAD; 1912 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1913 cmd.byte2 = SR_IMMED; 1914 cmd.how = type; 1915 1916 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1917 ST_RETRIES, ST_SPC_TIME, NULL, flags); 1918 if (error) { 1919 printf("%s: error %d in st_load (op %d)\n", 1920 st->sc_dev.dv_xname, error, type); 1921 } 1922 return (error); 1923 } 1924 1925 /* 1926 * Rewind the device 1927 */ 1928 static int 1929 st_rewind(struct st_softc *st, u_int immediate, int flags) 1930 { 1931 struct scsi_rewind cmd; 1932 int error; 1933 int nmarks; 1934 1935 error = st_check_eod(st, FALSE, &nmarks, flags); 1936 if (error) { 1937 printf("%s: failed to write closing filemarks at " 1938 "rewind, errno=%d\n", st->sc_dev.dv_xname, error); 1939 return (error); 1940 } 1941 st->flags &= ~ST_PER_ACTION; 1942 1943 /* 1944 * ATAPI tapes always need immediate to be set 1945 */ 1946 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1947 immediate = SR_IMMED; 1948 1949 memset(&cmd, 0, sizeof(cmd)); 1950 cmd.opcode = REWIND; 1951 cmd.byte2 = immediate; 1952 1953 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1954 ST_RETRIES, immediate ? ST_CTL_TIME: ST_SPC_TIME, NULL, flags); 1955 if (error) { 1956 printf("%s: error %d trying to rewind\n", 1957 st->sc_dev.dv_xname, error); 1958 /* lost position */ 1959 st->fileno = st->blkno = -1; 1960 } else { 1961 st->fileno = st->blkno = 0; 1962 } 1963 return (error); 1964 } 1965 1966 static int 1967 st_rdpos(struct st_softc *st, int hard, u_int32_t *blkptr) 1968 { 1969 int error; 1970 u_int8_t posdata[20]; 1971 struct scsi_tape_read_position cmd; 1972 1973 /* 1974 * We try and flush any buffered writes here if we were writing 1975 * and we're trying to get hardware block position. It eats 1976 * up performance substantially, but I'm wary of drive firmware. 1977 * 1978 * I think that *logical* block position is probably okay- 1979 * but hardware block position might have to wait for data 1980 * to hit media to be valid. Caveat Emptor. 1981 */ 1982 1983 if (hard && (st->flags & ST_WRITTEN)) { 1984 /* 1985 * First flush any pending writes... 1986 */ 1987 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 1988 /* 1989 * The latter case is for 'write protected' tapes 1990 * which are too stupid to recognize a zero count 1991 * for writing filemarks as a no-op. 1992 */ 1993 if (error != 0 && error != EACCES && error != EROFS) 1994 return (error); 1995 } 1996 1997 memset(&cmd, 0, sizeof(cmd)); 1998 memset(&posdata, 0, sizeof(posdata)); 1999 cmd.opcode = READ_POSITION; 2000 if (hard) 2001 cmd.byte1 = 1; 2002 2003 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 2004 (void *)&posdata, sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, 2005 XS_CTL_SILENT | XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); 2006 2007 if (error == 0) { 2008 #if 0 2009 printf("posdata:"); 2010 for (hard = 0; hard < sizeof(posdata); hard++) 2011 printf("%02x ", posdata[hard] & 0xff); 2012 printf("\n"); 2013 #endif 2014 if (posdata[0] & 0x4) /* Block Position Unknown */ 2015 error = EINVAL; 2016 else 2017 *blkptr = _4btol(&posdata[4]); 2018 } 2019 return (error); 2020 } 2021 2022 static int 2023 st_setpos(struct st_softc *st, int hard, u_int32_t *blkptr) 2024 { 2025 int error; 2026 struct scsi_tape_locate cmd; 2027 2028 /* 2029 * We used to try and flush any buffered writes here. 2030 * Now we push this onto user applications to either 2031 * flush the pending writes themselves (via a zero count 2032 * WRITE FILEMARKS command) or they can trust their tape 2033 * drive to do this correctly for them. 2034 * 2035 * There are very ugly performance limitations otherwise. 2036 */ 2037 2038 memset(&cmd, 0, sizeof(cmd)); 2039 cmd.opcode = LOCATE; 2040 if (hard) 2041 cmd.byte2 = 1 << 2; 2042 _lto4b(*blkptr, cmd.blkaddr); 2043 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 2044 ST_RETRIES, ST_SPC_TIME, NULL, 0); 2045 /* 2046 * Note file && block number position now unknown (if 2047 * these things ever start being maintained in this driver) 2048 */ 2049 st->fileno = st->blkno = -1; 2050 return (error); 2051 } 2052 2053 2054 /* 2055 * Look at the returned sense and act on the error and determine 2056 * the unix error number to pass back..., 0 (== report no error), 2057 * -1 = retry the operation, -2 continue error processing. 2058 */ 2059 static int 2060 st_interpret_sense(struct scsipi_xfer *xs) 2061 { 2062 struct scsipi_periph *periph = xs->xs_periph; 2063 struct scsipi_sense_data *sense = &xs->sense.scsi_sense; 2064 struct buf *bp = xs->bp; 2065 struct st_softc *st = (void *)periph->periph_dev; 2066 int retval = EJUSTRETURN; 2067 int doprint = ((xs->xs_control & XS_CTL_SILENT) == 0); 2068 u_int8_t key; 2069 int32_t info; 2070 2071 /* 2072 * If it isn't a extended or extended/deferred error, let 2073 * the generic code handle it. 2074 */ 2075 if ((sense->error_code & SSD_ERRCODE) != 0x70 && 2076 (sense->error_code & SSD_ERRCODE) != 0x71) { /* DEFFERRED */ 2077 return (retval); 2078 } 2079 2080 if (sense->error_code & SSD_ERRCODE_VALID) 2081 info = _4btol(sense->info); 2082 else 2083 info = (st->flags & ST_FIXEDBLOCKS) ? 2084 xs->datalen / st->blksize : xs->datalen; 2085 key = sense->flags & SSD_KEY; 2086 st->mt_erreg = key; 2087 st->asc = sense->add_sense_code; 2088 st->ascq = sense->add_sense_code_qual; 2089 st->mt_resid = (short) info; 2090 2091 if (key == SKEY_NOT_READY && st->asc == 0x4 && st->ascq == 0x1) { 2092 /* Not Ready, Logical Unit Is in Process Of Becoming Ready */ 2093 if (!callout_pending(&periph->periph_callout)) 2094 scsipi_periph_freeze(periph, 1); 2095 callout_reset(&periph->periph_callout, 2096 hz, scsipi_periph_timed_thaw, periph); 2097 return (ERESTART); 2098 } 2099 2100 /* 2101 * If the device is not open yet, let generic handle 2102 */ 2103 if ((periph->periph_flags & PERIPH_OPEN) == 0) { 2104 return (retval); 2105 } 2106 2107 xs->resid = info; 2108 if (st->flags & ST_FIXEDBLOCKS) { 2109 if (bp) { 2110 xs->resid *= st->blksize; 2111 st->last_io_resid = xs->resid; 2112 } else { 2113 st->last_ctl_resid = xs->resid; 2114 } 2115 if (key == SKEY_VOLUME_OVERFLOW) { 2116 st->flags |= ST_EIO_PENDING; 2117 if (bp) 2118 bp->b_resid = xs->resid; 2119 } else if (sense->flags & SSD_EOM) { 2120 if ((st->flags & ST_EARLYWARN) == 0) 2121 st->flags |= ST_EIO_PENDING; 2122 st->flags |= ST_EOM_PENDING; 2123 if (bp) { 2124 #if 0 2125 bp->b_resid = xs->resid; 2126 #else 2127 /* 2128 * Grotesque as it seems, the few times 2129 * I've actually seen a non-zero resid, 2130 * the tape drive actually lied and had 2131 * written all the data! 2132 */ 2133 bp->b_resid = 0; 2134 #endif 2135 } 2136 } 2137 if (sense->flags & SSD_FILEMARK) { 2138 st->flags |= ST_AT_FILEMARK; 2139 if (bp) 2140 bp->b_resid = xs->resid; 2141 if (st->fileno != (daddr_t) -1) { 2142 st->fileno++; 2143 st->blkno = 0; 2144 st->flags |= ST_POSUPDATED; 2145 } 2146 } 2147 if (sense->flags & SSD_ILI) { 2148 st->flags |= ST_EIO_PENDING; 2149 if (bp) 2150 bp->b_resid = xs->resid; 2151 if (sense->error_code & SSD_ERRCODE_VALID && 2152 (xs->xs_control & XS_CTL_SILENT) == 0) 2153 printf("%s: block wrong size, %d blocks " 2154 "residual\n", st->sc_dev.dv_xname, info); 2155 2156 /* 2157 * This quirk code helps the drive read 2158 * the first tape block, regardless of 2159 * format. That is required for these 2160 * drives to return proper MODE SENSE 2161 * information. 2162 */ 2163 if ((st->quirks & ST_Q_SENSE_HELP) && 2164 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 2165 st->blksize -= 512; 2166 else if ((st->flags & ST_POSUPDATED) == 0) { 2167 if (st->blkno != (daddr_t) -1) { 2168 st->blkno += 2169 (xs->datalen / st->blksize); 2170 st->flags |= ST_POSUPDATED; 2171 } 2172 } 2173 } 2174 /* 2175 * If data wanted and no data was transferred, do it immediately 2176 */ 2177 if (xs->datalen && xs->resid >= xs->datalen) { 2178 if (st->flags & ST_EIO_PENDING) 2179 return (EIO); 2180 if (st->flags & ST_AT_FILEMARK) { 2181 if (bp) 2182 bp->b_resid = xs->resid; 2183 return (0); 2184 } 2185 } 2186 } else { /* must be variable mode */ 2187 if (bp) { 2188 st->last_io_resid = xs->resid; 2189 } else { 2190 st->last_ctl_resid = xs->resid; 2191 } 2192 if (sense->flags & SSD_EOM) { 2193 /* 2194 * The current semantics of this 2195 * driver requires EOM detection 2196 * to return EIO unless early 2197 * warning detection is enabled 2198 * for variable mode (this is always 2199 * on for fixed block mode). 2200 */ 2201 if (st->flags & ST_EARLYWARN) { 2202 st->flags |= ST_EOM_PENDING; 2203 retval = 0; 2204 } else { 2205 retval = EIO; 2206 } 2207 2208 /* 2209 * If it's an unadorned EOM detection, 2210 * suppress printing an error. 2211 */ 2212 if (key == SKEY_NO_SENSE) { 2213 doprint = 0; 2214 } 2215 } else if (sense->flags & SSD_FILEMARK) { 2216 retval = 0; 2217 if (st->fileno != (daddr_t) -1) { 2218 st->fileno++; 2219 st->blkno = 0; 2220 st->flags |= ST_POSUPDATED; 2221 } 2222 } else if (sense->flags & SSD_ILI) { 2223 if (info < 0) { 2224 /* 2225 * The tape record was bigger than the read 2226 * we issued. 2227 */ 2228 if ((xs->xs_control & XS_CTL_SILENT) == 0) { 2229 printf("%s: %d-byte tape record too big" 2230 " for %d-byte user buffer\n", 2231 st->sc_dev.dv_xname, 2232 xs->datalen - info, xs->datalen); 2233 } 2234 retval = EIO; 2235 } else { 2236 retval = 0; 2237 if (st->blkno != (daddr_t) -1) { 2238 st->blkno++; 2239 st->flags |= ST_POSUPDATED; 2240 } 2241 } 2242 } 2243 if (bp) 2244 bp->b_resid = info; 2245 } 2246 2247 #ifndef SCSIPI_DEBUG 2248 if (retval == 0 && key == SKEY_NO_SENSE) 2249 doprint = 0; 2250 #endif 2251 if (key == SKEY_BLANK_CHECK) { 2252 /* 2253 * This quirk code helps the drive read the 2254 * first tape block, regardless of format. That 2255 * is required for these drives to return proper 2256 * MODE SENSE information. 2257 */ 2258 if ((st->quirks & ST_Q_SENSE_HELP) && 2259 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 2260 /* still starting */ 2261 st->blksize -= 512; 2262 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 2263 st->flags |= ST_BLANK_READ; 2264 xs->resid = xs->datalen; 2265 if (bp) { 2266 bp->b_resid = xs->resid; 2267 /* return an EOF */ 2268 } 2269 retval = 0; 2270 /* lost position */ 2271 st->fileno = st->blkno = -1; 2272 } 2273 } 2274 2275 /* 2276 * If generic sense processing will continue, we should not 2277 * print sense info here. 2278 */ 2279 if (retval == EJUSTRETURN) 2280 doprint = 0; 2281 2282 if (doprint) { 2283 #ifdef SCSIVERBOSE 2284 scsipi_print_sense(xs, 0); 2285 #else 2286 scsipi_printaddr(periph); 2287 printf("Sense Key 0x%02x", key); 2288 if ((sense->error_code & SSD_ERRCODE_VALID) != 0) { 2289 switch (key) { 2290 case SKEY_NOT_READY: 2291 case SKEY_ILLEGAL_REQUEST: 2292 case SKEY_UNIT_ATTENTION: 2293 case SKEY_WRITE_PROTECT: 2294 break; 2295 case SKEY_VOLUME_OVERFLOW: 2296 case SKEY_BLANK_CHECK: 2297 printf(", requested size: %d (decimal)", info); 2298 break; 2299 case SKEY_ABORTED_COMMAND: 2300 if (xs->xs_retries) 2301 printf(", retrying"); 2302 printf(", cmd 0x%x, info 0x%x", 2303 xs->cmd->opcode, info); 2304 break; 2305 default: 2306 printf(", info = %d (decimal)", info); 2307 } 2308 } 2309 if (sense->extra_len != 0) { 2310 int n; 2311 printf(", data ="); 2312 for (n = 0; n < sense->extra_len; n++) 2313 printf(" %02x", sense->cmd_spec_info[n]); 2314 } 2315 printf("\n"); 2316 #endif 2317 } 2318 return (retval); 2319 } 2320 2321 /* 2322 * The quirk here is that the drive returns some value to st_mode_sense 2323 * incorrectly until the tape has actually passed by the head. 2324 * 2325 * The method is to set the drive to large fixed-block state (user-specified 2326 * density and 1024-byte blocks), then read and rewind to get it to sense the 2327 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 2328 * work, as a last resort, try variable- length blocks. The result will be 2329 * the ability to do an accurate st_mode_sense. 2330 * 2331 * We know we can do a rewind because we just did a load, which implies rewind. 2332 * Rewind seems preferable to space backward if we have a virgin tape. 2333 * 2334 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 2335 * error processing, both part of st_interpret_sense. 2336 */ 2337 static int 2338 st_touch_tape(struct st_softc *st) 2339 { 2340 char *buf; 2341 int readsize; 2342 int error; 2343 2344 buf = malloc(1024, M_TEMP, M_NOWAIT); 2345 if (buf == NULL) 2346 return (ENOMEM); 2347 2348 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 2349 goto bad; 2350 2351 /* 2352 * If the block size is already known from the 2353 * sense data, use it. Else start probing at 1024. 2354 */ 2355 if (st->media_blksize > 0) 2356 st->blksize = st->media_blksize; 2357 else 2358 st->blksize = 1024; 2359 2360 do { 2361 switch (st->blksize) { 2362 case 512: 2363 case 1024: 2364 readsize = st->blksize; 2365 st->flags |= ST_FIXEDBLOCKS; 2366 break; 2367 default: 2368 readsize = 1; 2369 st->flags &= ~ST_FIXEDBLOCKS; 2370 } 2371 if ((error = st->ops(st, ST_OPS_MODESELECT, XS_CTL_SILENT)) 2372 != 0) { 2373 /* 2374 * The device did not agree with the proposed 2375 * block size. If we exhausted our options, 2376 * return failure, else try another. 2377 */ 2378 if (readsize == 1) 2379 goto bad; 2380 st->blksize -= 512; 2381 continue; 2382 } 2383 st_read(st, buf, readsize, XS_CTL_SILENT); /* XXX */ 2384 if ((error = st_rewind(st, 0, 0)) != 0) { 2385 bad: free(buf, M_TEMP); 2386 return (error); 2387 } 2388 } while (readsize != 1 && readsize > st->blksize); 2389 2390 free(buf, M_TEMP); 2391 return (0); 2392 } 2393 2394 static int 2395 stdump(dev_t dev, daddr_t blkno, caddr_t va, size_t size) 2396 { 2397 2398 /* Not implemented. */ 2399 return (ENXIO); 2400 } 2401
Indexes created Fri Sep 26 20:09:58 GMT 2025