st.c revision 1.178
1 /* $NetBSD: st.c,v 1.178 2005/02/27 00:27:48 perry 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 1.178 2005/02/27 00:27:48 perry Exp $"); 61 62 #include "opt_scsi.h" 63 64 #include <sys/param.h> 65 #include <sys/systm.h> 66 #include <sys/fcntl.h> 67 #include <sys/errno.h> 68 #include <sys/ioctl.h> 69 #include <sys/malloc.h> 70 #include <sys/buf.h> 71 #include <sys/bufq.h> 72 #include <sys/proc.h> 73 #include <sys/user.h> 74 #include <sys/mtio.h> 75 #include <sys/device.h> 76 #include <sys/conf.h> 77 #include <sys/kernel.h> 78 #include <sys/vnode.h> 79 80 #include <dev/scsipi/scsi_spc.h> 81 #include <dev/scsipi/scsipi_all.h> 82 #include <dev/scsipi/scsi_all.h> 83 #include <dev/scsipi/scsi_tape.h> 84 #include <dev/scsipi/scsipiconf.h> 85 #include <dev/scsipi/scsipi_base.h> 86 #include <dev/scsipi/stvar.h> 87 88 /* Defines for device specific stuff */ 89 #define DEF_FIXED_BSIZE 512 90 91 #define STMODE(z) ( minor(z) & 0x03) 92 #define STDSTY(z) ((minor(z) >> 2) & 0x03) 93 #define STUNIT(z) ((minor(z) >> 4) ) 94 #define STNMINOR 16 95 96 #define NORMAL_MODE 0 97 #define NOREW_MODE 1 98 #define EJECT_MODE 2 99 #define CTRL_MODE 3 100 101 #define FALSE 0 102 #define TRUE 1 103 104 #ifndef ST_MOUNT_DELAY 105 #define ST_MOUNT_DELAY 0 106 #endif 107 108 static dev_type_open(stopen); 109 static dev_type_close(stclose); 110 static dev_type_read(stread); 111 static dev_type_write(stwrite); 112 static dev_type_ioctl(stioctl); 113 static dev_type_strategy(ststrategy); 114 static dev_type_dump(stdump); 115 116 const struct bdevsw st_bdevsw = { 117 stopen, stclose, ststrategy, stioctl, stdump, nosize, D_TAPE 118 }; 119 120 const struct cdevsw st_cdevsw = { 121 stopen, stclose, stread, stwrite, stioctl, 122 nostop, notty, nopoll, nommap, nokqfilter, D_TAPE 123 }; 124 125 /* 126 * Define various devices that we know mis-behave in some way, 127 * and note how they are bad, so we can correct for them 128 */ 129 130 static const struct st_quirk_inquiry_pattern st_quirk_patterns[] = { 131 {{T_SEQUENTIAL, T_REMOV, 132 " ", " ", " "}, {0, 0, { 133 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 134 {ST_Q_FORCE_BLKSIZE, 512, QIC_24}, /* minor 4-7 */ 135 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_1600}, /* minor 8-11 */ 136 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_6250} /* minor 12-15 */ 137 }}}, 138 {{T_SEQUENTIAL, T_REMOV, 139 "TANDBERG", " TDC 3600 ", ""}, {0, 12, { 140 {0, 0, 0}, /* minor 0-3 */ 141 {ST_Q_FORCE_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 142 {0, 0, QIC_150}, /* minor 8-11 */ 143 {0, 0, QIC_120} /* minor 12-15 */ 144 }}}, 145 {{T_SEQUENTIAL, T_REMOV, 146 "TANDBERG", " TDC 3800 ", ""}, {0, 0, { 147 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 148 {0, 0, QIC_525}, /* minor 4-7 */ 149 {0, 0, QIC_150}, /* minor 8-11 */ 150 {0, 0, QIC_120} /* minor 12-15 */ 151 }}}, 152 {{T_SEQUENTIAL, T_REMOV, 153 "TANDBERG", " SLR5 4/8GB ", ""}, {0, 0, { 154 {ST_Q_FORCE_BLKSIZE, 1024, 0}, /* minor 0-3 */ 155 {0, 0, 0}, /* minor 4-7 */ 156 {0, 0, 0}, /* minor 8-11 */ 157 {0, 0, 0} /* minor 12-15 */ 158 }}}, 159 /* 160 * lacking a manual for the 4200, it's not clear what the 161 * specific density codes should be- the device is a 2.5GB 162 * capable QIC drive, those density codes aren't readily 163 * availabel. The 'default' will just have to do. 164 */ 165 {{T_SEQUENTIAL, T_REMOV, 166 "TANDBERG", " TDC 4200 ", ""}, {0, 0, { 167 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 168 {0, 0, QIC_525}, /* minor 4-7 */ 169 {0, 0, QIC_150}, /* minor 8-11 */ 170 {0, 0, QIC_120} /* minor 12-15 */ 171 }}}, 172 /* 173 * At least -005 and -007 need this. I'll assume they all do unless I 174 * hear otherwise. - mycroft, 31MAR1994 175 */ 176 {{T_SEQUENTIAL, T_REMOV, 177 "ARCHIVE ", "VIPER 2525 25462", ""}, {0, 0, { 178 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 179 {ST_Q_SENSE_HELP, 0, QIC_525}, /* minor 4-7 */ 180 {0, 0, QIC_150}, /* minor 8-11 */ 181 {0, 0, QIC_120} /* minor 12-15 */ 182 }}}, 183 /* 184 * One user reports that this works for his tape drive. It probably 185 * needs more work. - mycroft, 09APR1994 186 */ 187 {{T_SEQUENTIAL, T_REMOV, 188 "SANKYO ", "CP525 ", ""}, {0, 0, { 189 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 190 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 191 {0, 0, QIC_150}, /* minor 8-11 */ 192 {0, 0, QIC_120} /* minor 12-15 */ 193 }}}, 194 {{T_SEQUENTIAL, T_REMOV, 195 "ANRITSU ", "DMT780 ", ""}, {0, 0, { 196 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 197 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 198 {0, 0, QIC_150}, /* minor 8-11 */ 199 {0, 0, QIC_120} /* minor 12-15 */ 200 }}}, 201 {{T_SEQUENTIAL, T_REMOV, 202 "ARCHIVE ", "VIPER 150 21247", ""}, {ST_Q_ERASE_NOIMM, 12, { 203 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 204 {0, 0, QIC_150}, /* minor 4-7 */ 205 {0, 0, QIC_120}, /* minor 8-11 */ 206 {0, 0, QIC_24} /* minor 12-15 */ 207 }}}, 208 {{T_SEQUENTIAL, T_REMOV, 209 "ARCHIVE ", "VIPER 150 21531", ""}, {ST_Q_ERASE_NOIMM, 12, { 210 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 211 {0, 0, QIC_150}, /* minor 4-7 */ 212 {0, 0, QIC_120}, /* minor 8-11 */ 213 {0, 0, QIC_24} /* minor 12-15 */ 214 }}}, 215 {{T_SEQUENTIAL, T_REMOV, 216 "WANGTEK ", "5099ES SCSI", ""}, {0, 0, { 217 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 218 {0, 0, QIC_11}, /* minor 4-7 */ 219 {0, 0, QIC_24}, /* minor 8-11 */ 220 {0, 0, QIC_24} /* minor 12-15 */ 221 }}}, 222 {{T_SEQUENTIAL, T_REMOV, 223 "WANGTEK ", "5150ES SCSI", ""}, {0, 0, { 224 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 225 {0, 0, QIC_24}, /* minor 4-7 */ 226 {0, 0, QIC_120}, /* minor 8-11 */ 227 {0, 0, QIC_150} /* minor 12-15 */ 228 }}}, 229 {{T_SEQUENTIAL, T_REMOV, 230 "WANGTEK ", "5525ES SCSI REV7", ""}, {0, 0, { 231 {0, 0, 0}, /* minor 0-3 */ 232 {ST_Q_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 233 {0, 0, QIC_150}, /* minor 8-11 */ 234 {0, 0, QIC_120} /* minor 12-15 */ 235 }}}, 236 {{T_SEQUENTIAL, T_REMOV, 237 "WangDAT ", "Model 1300 ", ""}, {0, 0, { 238 {0, 0, 0}, /* minor 0-3 */ 239 {ST_Q_FORCE_BLKSIZE, 512, DDS}, /* minor 4-7 */ 240 {ST_Q_FORCE_BLKSIZE, 1024, DDS}, /* minor 8-11 */ 241 {ST_Q_FORCE_BLKSIZE, 0, DDS} /* minor 12-15 */ 242 }}}, 243 {{T_SEQUENTIAL, T_REMOV, 244 "EXABYTE ", "EXB-8200 ", "263H"}, {0, 5, { 245 {0, 0, 0}, /* minor 0-3 */ 246 {0, 0, 0}, /* minor 4-7 */ 247 {0, 0, 0}, /* minor 8-11 */ 248 {0, 0, 0} /* minor 12-15 */ 249 }}}, 250 {{T_SEQUENTIAL, T_REMOV, 251 "STK", "9490", ""}, 252 {ST_Q_FORCE_BLKSIZE, 0, { 253 {0, 0, 0}, /* minor 0-3 */ 254 {0, 0, 0}, /* minor 4-7 */ 255 {0, 0, 0}, /* minor 8-11 */ 256 {0, 0, 0} /* minor 12-15 */ 257 }}}, 258 {{T_SEQUENTIAL, T_REMOV, 259 "STK", "SD-3", ""}, 260 {ST_Q_FORCE_BLKSIZE, 0, { 261 {0, 0, 0}, /* minor 0-3 */ 262 {0, 0, 0}, /* minor 4-7 */ 263 {0, 0, 0}, /* minor 8-11 */ 264 {0, 0, 0} /* minor 12-15 */ 265 }}}, 266 {{T_SEQUENTIAL, T_REMOV, 267 "IBM", "03590", ""}, {ST_Q_IGNORE_LOADS, 0, { 268 {0, 0, 0}, /* minor 0-3 */ 269 {0, 0, 0}, /* minor 4-7 */ 270 {0, 0, 0}, /* minor 8-11 */ 271 {0, 0, 0} /* minor 12-15 */ 272 }}}, 273 {{T_SEQUENTIAL, T_REMOV, 274 "HP ", "T4000s ", ""}, {ST_Q_UNIMODAL, 0, { 275 {0, 0, QIC_3095}, /* minor 0-3 */ 276 {0, 0, QIC_3095}, /* minor 4-7 */ 277 {0, 0, QIC_3095}, /* minor 8-11 */ 278 {0, 0, QIC_3095}, /* minor 12-15 */ 279 }}}, 280 #if 0 281 {{T_SEQUENTIAL, T_REMOV, 282 "EXABYTE ", "EXB-8200 ", ""}, {0, 12, { 283 {0, 0, 0}, /* minor 0-3 */ 284 {0, 0, 0}, /* minor 4-7 */ 285 {0, 0, 0}, /* minor 8-11 */ 286 {0, 0, 0} /* minor 12-15 */ 287 }}}, 288 #endif 289 {{T_SEQUENTIAL, T_REMOV, 290 "TEAC ", "MT-2ST/N50 ", ""}, {ST_Q_IGNORE_LOADS, 0, { 291 {0, 0, 0}, /* minor 0-3 */ 292 {0, 0, 0}, /* minor 4-7 */ 293 {0, 0, 0}, /* minor 8-11 */ 294 {0, 0, 0} /* minor 12-15 */ 295 }}}, 296 {{T_SEQUENTIAL, T_REMOV, 297 "OnStream", "ADR50 Drive", ""}, {ST_Q_UNIMODAL, 0, { 298 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 299 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 4-7 */ 300 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 8-11 */ 301 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 12-15 */ 302 }}}, 303 {{T_SEQUENTIAL, T_REMOV, 304 "OnStream DI-30", "", "1.0"}, {ST_Q_NOFILEMARKS, 0, { 305 {0, 0, 0}, /* minor 0-3 */ 306 {0, 0, 0}, /* minor 4-7 */ 307 {0, 0, 0}, /* minor 8-11 */ 308 {0, 0, 0} /* minor 12-15 */ 309 }}}, 310 {{T_SEQUENTIAL, T_REMOV, 311 "NCR H621", "0-STD-03-46F880 ", ""}, {ST_Q_NOPREVENT, 0, { 312 {0, 0, 0}, /* minor 0-3 */ 313 {0, 0, 0}, /* minor 4-7 */ 314 {0, 0, 0}, /* minor 8-11 */ 315 {0, 0, 0} /* minor 12-15 */ 316 }}}, 317 }; 318 319 #define NOEJECT 0 320 #define EJECT 1 321 322 static void st_identify_drive(struct st_softc *, 323 struct scsipi_inquiry_pattern *); 324 static void st_loadquirks(struct st_softc *); 325 static int st_mount_tape(dev_t, int); 326 static void st_unmount(struct st_softc *, boolean); 327 static int st_decide_mode(struct st_softc *, boolean); 328 static void ststart(struct scsipi_periph *); 329 static void strestart(void *); 330 static void stdone(struct scsipi_xfer *, int); 331 static int st_read(struct st_softc *, char *, int, int); 332 static int st_space(struct st_softc *, int, u_int, int); 333 static int st_write_filemarks(struct st_softc *, int, int); 334 static int st_check_eod(struct st_softc *, boolean, int *, int); 335 static int st_load(struct st_softc *, u_int, int); 336 static int st_rewind(struct st_softc *, u_int, int); 337 static int st_interpret_sense(struct scsipi_xfer *); 338 static int st_touch_tape(struct st_softc *); 339 static int st_erase(struct st_softc *, int full, int flags); 340 static int st_rdpos(struct st_softc *, int, u_int32_t *); 341 static int st_setpos(struct st_softc *, int, u_int32_t *); 342 343 static const struct scsipi_periphsw st_switch = { 344 st_interpret_sense, 345 ststart, 346 NULL, 347 stdone 348 }; 349 350 #if defined(ST_ENABLE_EARLYWARN) 351 #define ST_INIT_FLAGS ST_EARLYWARN 352 #else 353 #define ST_INIT_FLAGS 0 354 #endif 355 356 /* 357 * The routine called by the low level scsi routine when it discovers 358 * A device suitable for this driver 359 */ 360 void 361 stattach(struct device *parent, struct st_softc *st, void *aux) 362 { 363 struct scsipibus_attach_args *sa = aux; 364 struct scsipi_periph *periph = sa->sa_periph; 365 366 SC_DEBUG(periph, SCSIPI_DB2, ("stattach: ")); 367 368 /* 369 * Store information needed to contact our base driver 370 */ 371 st->sc_periph = periph; 372 periph->periph_dev = &st->sc_dev; 373 periph->periph_switch = &st_switch; 374 375 /* 376 * Set initial flags 377 */ 378 379 st->flags = ST_INIT_FLAGS; 380 381 /* 382 * Set up the buf queue for this device 383 */ 384 bufq_alloc(&st->buf_queue, BUFQ_FCFS); 385 386 callout_init(&st->sc_callout); 387 388 /* 389 * Check if the drive is a known criminal and take 390 * Any steps needed to bring it into line 391 */ 392 st_identify_drive(st, &sa->sa_inqbuf); 393 /* 394 * Use the subdriver to request information regarding the drive. 395 */ 396 printf("\n"); 397 printf("%s: %s", st->sc_dev.dv_xname, st->quirkdata ? "rogue, " : ""); 398 if (scsipi_test_unit_ready(periph, 399 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE) || 400 st->ops(st, ST_OPS_MODESENSE, 401 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE)) 402 printf("drive empty\n"); 403 else { 404 printf("density code %d, ", st->media_density); 405 if (st->media_blksize > 0) 406 printf("%d-byte", st->media_blksize); 407 else 408 printf("variable"); 409 printf(" blocks, write-%s\n", 410 (st->flags & ST_READONLY) ? "protected" : "enabled"); 411 } 412 413 #if NRND > 0 414 rnd_attach_source(&st->rnd_source, st->sc_dev.dv_xname, 415 RND_TYPE_TAPE, 0); 416 #endif 417 } 418 419 int 420 stactivate(struct device *self, enum devact act) 421 { 422 int rv = 0; 423 424 switch (act) { 425 case DVACT_ACTIVATE: 426 rv = EOPNOTSUPP; 427 break; 428 429 case DVACT_DEACTIVATE: 430 /* 431 * Nothing to do; we key off the device's DVF_ACTIVE. 432 */ 433 break; 434 } 435 return (rv); 436 } 437 438 int 439 stdetach(struct device *self, int flags) 440 { 441 struct st_softc *st = (struct st_softc *)self; 442 struct buf *bp; 443 int s, bmaj, cmaj, mn; 444 445 /* locate the major number */ 446 bmaj = bdevsw_lookup_major(&st_bdevsw); 447 cmaj = cdevsw_lookup_major(&st_cdevsw); 448 449 /* kill any pending restart */ 450 callout_stop(&st->sc_callout); 451 452 s = splbio(); 453 454 /* Kill off any queued buffers. */ 455 while ((bp = BUFQ_GET(&st->buf_queue)) != NULL) { 456 bp->b_error = EIO; 457 bp->b_flags |= B_ERROR; 458 bp->b_resid = bp->b_bcount; 459 biodone(bp); 460 } 461 462 bufq_free(&st->buf_queue); 463 464 /* Kill off any pending commands. */ 465 scsipi_kill_pending(st->sc_periph); 466 467 splx(s); 468 469 /* Nuke the vnodes for any open instances */ 470 mn = STUNIT(self->dv_unit); 471 vdevgone(bmaj, mn, mn+STNMINOR-1, VBLK); 472 vdevgone(cmaj, mn, mn+STNMINOR-1, VCHR); 473 474 475 #if NRND > 0 476 /* Unhook the entropy source. */ 477 rnd_detach_source(&st->rnd_source); 478 #endif 479 480 return (0); 481 } 482 483 /* 484 * Use the inquiry routine in 'scsi_base' to get drive info so we can 485 * Further tailor our behaviour. 486 */ 487 static void 488 st_identify_drive(struct st_softc *st, struct scsipi_inquiry_pattern *inqbuf) 489 { 490 struct st_quirk_inquiry_pattern *finger; 491 int priority; 492 493 finger = (struct st_quirk_inquiry_pattern *)scsipi_inqmatch(inqbuf, 494 (caddr_t)st_quirk_patterns, 495 sizeof(st_quirk_patterns) / sizeof(st_quirk_patterns[0]), 496 sizeof(st_quirk_patterns[0]), &priority); 497 if (priority != 0) { 498 st->quirkdata = &finger->quirkdata; 499 st->drive_quirks = finger->quirkdata.quirks; 500 st->quirks = finger->quirkdata.quirks; /* start value */ 501 st->page_0_size = finger->quirkdata.page_0_size; 502 st_loadquirks(st); 503 } 504 } 505 506 /* 507 * initialise the subdevices to the default (QUIRK) state. 508 * this will remove any setting made by the system operator or previous 509 * operations. 510 */ 511 static void 512 st_loadquirks(struct st_softc *st) 513 { 514 int i; 515 struct modes *mode; 516 struct modes *mode2; 517 518 mode = st->quirkdata->modes; 519 mode2 = st->modes; 520 for (i = 0; i < 4; i++) { 521 memset(mode2, 0, sizeof(struct modes)); 522 st->modeflags[i] &= ~(BLKSIZE_SET_BY_QUIRK | 523 DENSITY_SET_BY_QUIRK | BLKSIZE_SET_BY_USER | 524 DENSITY_SET_BY_USER); 525 if ((mode->quirks | st->drive_quirks) & ST_Q_FORCE_BLKSIZE) { 526 mode2->blksize = mode->blksize; 527 st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; 528 } 529 if (mode->density) { 530 mode2->density = mode->density; 531 st->modeflags[i] |= DENSITY_SET_BY_QUIRK; 532 } 533 mode2->quirks |= mode->quirks; 534 mode++; 535 mode2++; 536 } 537 } 538 539 /* 540 * open the device. 541 */ 542 static int 543 stopen(dev_t dev, int flags, int mode, struct proc *p) 544 { 545 u_int stmode, dsty; 546 int error, sflags, unit, tries, ntries; 547 struct st_softc *st; 548 struct scsipi_periph *periph; 549 struct scsipi_adapter *adapt; 550 551 unit = STUNIT(dev); 552 if (unit >= st_cd.cd_ndevs) 553 return (ENXIO); 554 st = st_cd.cd_devs[unit]; 555 if (st == NULL) 556 return (ENXIO); 557 558 stmode = STMODE(dev); 559 dsty = STDSTY(dev); 560 561 periph = st->sc_periph; 562 adapt = periph->periph_channel->chan_adapter; 563 564 SC_DEBUG(periph, SCSIPI_DB1, ("open: dev=0x%x (unit %d (of %d))\n", dev, 565 unit, st_cd.cd_ndevs)); 566 567 568 /* 569 * Only allow one at a time 570 */ 571 if (periph->periph_flags & PERIPH_OPEN) { 572 printf("%s: already open\n", st->sc_dev.dv_xname); 573 return (EBUSY); 574 } 575 576 if ((error = scsipi_adapter_addref(adapt)) != 0) 577 return (error); 578 579 /* 580 * clear any latched errors. 581 */ 582 st->mt_resid = 0; 583 st->mt_erreg = 0; 584 st->asc = 0; 585 st->ascq = 0; 586 587 /* 588 * Catch any unit attention errors. Be silent about this 589 * unless we're already mounted. We ignore media change 590 * if we're in control mode or not mounted yet. 591 */ 592 if ((st->flags & ST_MOUNTED) == 0 || stmode == CTRL_MODE) { 593 #ifdef SCSIDEBUG 594 sflags = XS_CTL_IGNORE_MEDIA_CHANGE; 595 #else 596 sflags = XS_CTL_SILENT|XS_CTL_IGNORE_MEDIA_CHANGE; 597 #endif 598 } else 599 sflags = 0; 600 601 /* 602 * If we're already mounted or we aren't configured for 603 * a mount delay, only try a test unit ready once. Otherwise, 604 * try up to ST_MOUNT_DELAY times with a rest interval of 605 * one second between each try. 606 */ 607 608 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0) { 609 ntries = 1; 610 } else { 611 ntries = ST_MOUNT_DELAY; 612 } 613 614 for (error = tries = 0; tries < ntries; tries++) { 615 int slpintr, oflags; 616 617 /* 618 * If we had no error, or we're opening the control mode 619 * device, we jump out right away. 620 */ 621 622 error = scsipi_test_unit_ready(periph, sflags); 623 if (error == 0 || stmode == CTRL_MODE) { 624 break; 625 } 626 627 /* 628 * We had an error. 629 * 630 * If we're already mounted or we aren't configured for 631 * a mount delay, or the error isn't a NOT READY error, 632 * skip to the error exit now. 633 */ 634 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0 || 635 (st->mt_key != SKEY_NOT_READY)) { 636 goto bad; 637 } 638 639 /* 640 * clear any latched errors. 641 */ 642 st->mt_resid = 0; 643 st->mt_erreg = 0; 644 st->asc = 0; 645 st->ascq = 0; 646 647 /* 648 * Fake that we have the device open so 649 * we block other apps from getting in. 650 */ 651 652 oflags = periph->periph_flags; 653 periph->periph_flags |= PERIPH_OPEN; 654 655 slpintr = tsleep(&lbolt, PUSER|PCATCH, "stload", 0); 656 657 periph->periph_flags = oflags; /* restore flags */ 658 if (slpintr) { 659 goto bad; 660 } 661 } 662 663 664 /* 665 * If the mode is 3 (e.g. minor = 3,7,11,15) then the device has 666 * been opened to set defaults and perform other, usually non-I/O 667 * related, operations. In this case, do a quick check to see 668 * whether the unit actually had a tape loaded (this will be known 669 * as to whether or not we got a NOT READY for the above 670 * unit attention). If a tape is there, go do a mount sequence. 671 */ 672 if (stmode == CTRL_MODE && st->mt_key == SKEY_NOT_READY) { 673 periph->periph_flags |= PERIPH_OPEN; 674 return (0); 675 } 676 677 /* 678 * If we get this far and had an error set, that means we failed 679 * to pass the 'test unit ready' test for the non-controlmode device, 680 * so we bounce the open. 681 */ 682 683 if (error) 684 return (error); 685 686 /* 687 * Else, we're now committed to saying we're open. 688 */ 689 690 periph->periph_flags |= PERIPH_OPEN; /* unit attn are now errors */ 691 692 /* 693 * If it's a different mode, or if the media has been 694 * invalidated, unmount the tape from the previous 695 * session but continue with open processing 696 */ 697 if (st->last_dsty != dsty || 698 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 699 st_unmount(st, NOEJECT); 700 701 /* 702 * If we are not mounted, then we should start a new 703 * mount session. 704 */ 705 if (!(st->flags & ST_MOUNTED)) { 706 if ((error = st_mount_tape(dev, flags)) != 0) 707 goto bad; 708 st->last_dsty = dsty; 709 } 710 if (!(st->quirks & ST_Q_NOPREVENT)) { 711 scsipi_prevent(periph, SPAMR_PREVENT_DT, 712 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 713 } 714 715 SC_DEBUG(periph, SCSIPI_DB2, ("open complete\n")); 716 return (0); 717 718 bad: 719 st_unmount(st, NOEJECT); 720 scsipi_adapter_delref(adapt); 721 periph->periph_flags &= ~PERIPH_OPEN; 722 return (error); 723 } 724 725 /* 726 * close the device.. only called if we are the LAST 727 * occurence of an open device 728 */ 729 static int 730 stclose(dev_t dev, int flags, int mode, struct proc *p) 731 { 732 int stxx, error = 0; 733 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 734 struct scsipi_periph *periph = st->sc_periph; 735 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 736 737 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("closing\n")); 738 739 /* 740 * Make sure that a tape opened in write-only mode will have 741 * file marks written on it when closed, even if not written to. 742 * 743 * This is for SUN compatibility. Actually, the Sun way of 744 * things is to: 745 * 746 * only write filemarks if there are fmks to be written and 747 * - open for write (possibly read/write) 748 * - the last operation was a write 749 * or: 750 * - opened for wronly 751 * - no data was written (including filemarks) 752 */ 753 754 stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); 755 if (((flags & FWRITE) && stxx == ST_WRITTEN) || 756 ((flags & O_ACCMODE) == FWRITE && stxx == 0)) { 757 int nm; 758 error = st_check_eod(st, FALSE, &nm, 0); 759 } 760 761 /* 762 * Allow robots to eject tape if needed. 763 */ 764 scsipi_prevent(periph, SPAMR_ALLOW, 765 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 766 767 switch (STMODE(dev)) { 768 case NORMAL_MODE: 769 st_unmount(st, NOEJECT); 770 break; 771 case NOREW_MODE: 772 case CTRL_MODE: 773 /* 774 * Leave mounted unless media seems to have been removed. 775 * 776 * Otherwise, if we're to terminate a tape with more than one 777 * filemark [ and because we're not rewinding here ], backspace 778 * one filemark so that later appends will see an unbroken 779 * sequence of: 780 * 781 * file - FMK - file - FMK ... file - FMK FMK (EOM) 782 */ 783 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 784 st_unmount(st, NOEJECT); 785 } else if (error == 0) { 786 /* 787 * ST_WRITTEN was preserved from above. 788 * 789 * All we need to know here is: 790 * 791 * Were we writing this tape and was the last 792 * operation a write? 793 * 794 * Are there supposed to be 2FM at EOD? 795 * 796 * If both statements are true, then we backspace 797 * one filemark. 798 */ 799 stxx |= (st->flags & ST_2FM_AT_EOD); 800 if ((flags & FWRITE) != 0 && 801 (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { 802 error = st_space(st, -1, SP_FILEMARKS, 0); 803 } 804 } 805 break; 806 case EJECT_MODE: 807 st_unmount(st, EJECT); 808 break; 809 } 810 811 scsipi_wait_drain(periph); 812 813 scsipi_adapter_delref(adapt); 814 periph->periph_flags &= ~PERIPH_OPEN; 815 816 return (error); 817 } 818 819 /* 820 * Start a new mount session. 821 * Copy in all the default parameters from the selected device mode. 822 * and try guess any that seem to be defaulted. 823 */ 824 static int 825 st_mount_tape(dev_t dev, int flags) 826 { 827 int unit; 828 u_int dsty; 829 struct st_softc *st; 830 struct scsipi_periph *periph; 831 int error = 0; 832 833 unit = STUNIT(dev); 834 dsty = STDSTY(dev); 835 st = st_cd.cd_devs[unit]; 836 periph = st->sc_periph; 837 838 if (st->flags & ST_MOUNTED) 839 return (0); 840 841 SC_DEBUG(periph, SCSIPI_DB1, ("mounting\n ")); 842 st->flags |= ST_NEW_MOUNT; 843 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 844 /* 845 * If the media is new, then make sure we give it a chance to 846 * to do a 'load' instruction. (We assume it is new.) 847 */ 848 if ((error = st_load(st, LD_LOAD, XS_CTL_SILENT)) != 0) 849 return (error); 850 /* 851 * Throw another dummy instruction to catch 852 * 'Unit attention' errors. Many drives give 853 * these after doing a Load instruction (with 854 * the MEDIUM MAY HAVE CHANGED asc/ascq). 855 */ 856 scsipi_test_unit_ready(periph, XS_CTL_SILENT); /* XXX */ 857 858 /* 859 * Some devices can't tell you much until they have been 860 * asked to look at the media. This quirk does this. 861 */ 862 if (st->quirks & ST_Q_SENSE_HELP) 863 if ((error = st_touch_tape(st)) != 0) 864 return (error); 865 /* 866 * Load the physical device parameters 867 * loads: blkmin, blkmax 868 */ 869 if ((error = st->ops(st, ST_OPS_RBL, 0)) != 0) 870 return (error); 871 /* 872 * Load the media dependent parameters 873 * includes: media_blksize,media_density,numblks 874 * As we have a tape in, it should be reflected here. 875 * If not you may need the "quirk" above. 876 */ 877 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 878 return (error); 879 /* 880 * If we have gained a permanent density from somewhere, 881 * then use it in preference to the one supplied by 882 * default by the driver. 883 */ 884 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 885 st->density = st->modes[dsty].density; 886 else 887 st->density = st->media_density; 888 /* 889 * If we have gained a permanent blocksize 890 * then use it in preference to the one supplied by 891 * default by the driver. 892 */ 893 st->flags &= ~ST_FIXEDBLOCKS; 894 if (st->modeflags[dsty] & 895 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 896 st->blksize = st->modes[dsty].blksize; 897 if (st->blksize) 898 st->flags |= ST_FIXEDBLOCKS; 899 } else { 900 if ((error = st_decide_mode(st, FALSE)) != 0) 901 return (error); 902 } 903 if ((error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 904 /* ATAPI will return ENODEV for this, and this may be OK */ 905 if (error != ENODEV) { 906 printf("%s: cannot set selected mode\n", 907 st->sc_dev.dv_xname); 908 return (error); 909 } 910 } 911 st->flags &= ~ST_NEW_MOUNT; 912 st->flags |= ST_MOUNTED; 913 periph->periph_flags |= PERIPH_MEDIA_LOADED; /* move earlier? */ 914 st->blkno = st->fileno = (daddr_t) 0; 915 return (0); 916 } 917 918 /* 919 * End the present mount session. 920 * Rewind, and optionally eject the tape. 921 * Reset various flags to indicate that all new 922 * operations require another mount operation 923 */ 924 static void 925 st_unmount(struct st_softc *st, boolean eject) 926 { 927 struct scsipi_periph *periph = st->sc_periph; 928 int nmarks; 929 930 if ((st->flags & ST_MOUNTED) == 0) 931 return; 932 SC_DEBUG(periph, SCSIPI_DB1, ("unmounting\n")); 933 st_check_eod(st, FALSE, &nmarks, XS_CTL_IGNORE_NOT_READY); 934 st_rewind(st, 0, XS_CTL_IGNORE_NOT_READY); 935 936 /* 937 * Section 9.3.3 of the SCSI specs states that a device shall return 938 * the density value specified in the last succesfull MODE SELECT 939 * after an unload operation, in case it is not able to 940 * automatically determine the density of the new medium. 941 * 942 * So we instruct the device to use the default density, which will 943 * prevent the use of stale density values (in particular, 944 * in st_touch_tape(). 945 */ 946 st->density = 0; 947 if (st->ops(st, ST_OPS_MODESELECT, 0) != 0) { 948 printf("%s: WARNING: cannot revert to default density\n", 949 st->sc_dev.dv_xname); 950 } 951 952 if (eject) { 953 if (!(st->quirks & ST_Q_NOPREVENT)) { 954 scsipi_prevent(periph, SPAMR_ALLOW, 955 XS_CTL_IGNORE_ILLEGAL_REQUEST | 956 XS_CTL_IGNORE_NOT_READY); 957 } 958 st_load(st, LD_UNLOAD, XS_CTL_IGNORE_NOT_READY); 959 st->blkno = st->fileno = (daddr_t) -1; 960 } else { 961 st->blkno = st->fileno = (daddr_t) 0; 962 } 963 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 964 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 965 } 966 967 /* 968 * Given all we know about the device, media, mode, 'quirks' and 969 * initial operation, make a decision as to how we should be set 970 * to run (regarding blocking and EOD marks) 971 */ 972 int 973 st_decide_mode(struct st_softc *st, boolean first_read) 974 { 975 976 SC_DEBUG(st->sc_periph, SCSIPI_DB2, ("starting block mode decision\n")); 977 978 /* 979 * If the drive can only handle fixed-length blocks and only at 980 * one size, perhaps we should just do that. 981 */ 982 if (st->blkmin && (st->blkmin == st->blkmax)) { 983 st->flags |= ST_FIXEDBLOCKS; 984 st->blksize = st->blkmin; 985 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 986 ("blkmin == blkmax of %d\n", st->blkmin)); 987 goto done; 988 } 989 /* 990 * If the tape density mandates (or even suggests) use of fixed 991 * or variable-length blocks, comply. 992 */ 993 switch (st->density) { 994 case HALFINCH_800: 995 case HALFINCH_1600: 996 case HALFINCH_6250: 997 case DDS: 998 st->flags &= ~ST_FIXEDBLOCKS; 999 st->blksize = 0; 1000 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1001 ("density specified variable\n")); 1002 goto done; 1003 case QIC_11: 1004 case QIC_24: 1005 case QIC_120: 1006 case QIC_150: 1007 case QIC_525: 1008 case QIC_1320: 1009 case QIC_3095: 1010 case QIC_3220: 1011 st->flags |= ST_FIXEDBLOCKS; 1012 if (st->media_blksize > 0) 1013 st->blksize = st->media_blksize; 1014 else 1015 st->blksize = DEF_FIXED_BSIZE; 1016 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1017 ("density specified fixed\n")); 1018 goto done; 1019 } 1020 /* 1021 * If we're about to read the tape, perhaps we should choose 1022 * fixed or variable-length blocks and block size according to 1023 * what the drive found on the tape. 1024 */ 1025 if (first_read && 1026 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 1027 (st->media_blksize == DEF_FIXED_BSIZE) || 1028 (st->media_blksize == 1024))) { 1029 if (st->media_blksize > 0) 1030 st->flags |= ST_FIXEDBLOCKS; 1031 else 1032 st->flags &= ~ST_FIXEDBLOCKS; 1033 st->blksize = st->media_blksize; 1034 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1035 ("Used media_blksize of %d\n", st->media_blksize)); 1036 goto done; 1037 } 1038 /* 1039 * We're getting no hints from any direction. Choose variable- 1040 * length blocks arbitrarily. 1041 */ 1042 st->flags &= ~ST_FIXEDBLOCKS; 1043 st->blksize = 0; 1044 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1045 ("Give up and default to variable mode\n")); 1046 1047 done: 1048 /* 1049 * Decide whether or not to write two file marks to signify end- 1050 * of-data. Make the decision as a function of density. If 1051 * the decision is not to use a second file mark, the SCSI BLANK 1052 * CHECK condition code will be recognized as end-of-data when 1053 * first read. 1054 * (I think this should be a by-product of fixed/variable..julian) 1055 */ 1056 switch (st->density) { 1057 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 1058 case QIC_11: 1059 case QIC_24: 1060 case QIC_120: 1061 case QIC_150: 1062 case QIC_525: 1063 case QIC_1320: 1064 case QIC_3095: 1065 case QIC_3220: 1066 st->flags &= ~ST_2FM_AT_EOD; 1067 break; 1068 default: 1069 st->flags |= ST_2FM_AT_EOD; 1070 } 1071 return (0); 1072 } 1073 1074 /* 1075 * Actually translate the requested transfer into 1076 * one the physical driver can understand 1077 * The transfer is described by a buf and will include 1078 * only one physical transfer. 1079 */ 1080 static void 1081 ststrategy(struct buf *bp) 1082 { 1083 struct st_softc *st = st_cd.cd_devs[STUNIT(bp->b_dev)]; 1084 int s; 1085 1086 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1087 ("ststrategy %d bytes @ blk %" PRId64 "\n", bp->b_bcount, bp->b_blkno)); 1088 /* 1089 * If it's a null transfer, return immediatly 1090 */ 1091 if (bp->b_bcount == 0) 1092 goto done; 1093 1094 /* If offset is negative, error */ 1095 if (bp->b_blkno < 0) { 1096 bp->b_error = EINVAL; 1097 goto bad; 1098 } 1099 1100 /* 1101 * Odd sized request on fixed drives are verboten 1102 */ 1103 if (st->flags & ST_FIXEDBLOCKS) { 1104 if (bp->b_bcount % st->blksize) { 1105 printf("%s: bad request, must be multiple of %d\n", 1106 st->sc_dev.dv_xname, st->blksize); 1107 bp->b_error = EIO; 1108 goto bad; 1109 } 1110 } 1111 /* 1112 * as are out-of-range requests on variable drives. 1113 */ 1114 else if (bp->b_bcount < st->blkmin || 1115 (st->blkmax && bp->b_bcount > st->blkmax)) { 1116 printf("%s: bad request, must be between %d and %d\n", 1117 st->sc_dev.dv_xname, st->blkmin, st->blkmax); 1118 bp->b_error = EIO; 1119 goto bad; 1120 } 1121 s = splbio(); 1122 1123 /* 1124 * Place it in the queue of activities for this tape 1125 * at the end (a bit silly because we only have on user.. 1126 * (but it could fork())) 1127 */ 1128 BUFQ_PUT(&st->buf_queue, bp); 1129 1130 /* 1131 * Tell the device to get going on the transfer if it's 1132 * not doing anything, otherwise just wait for completion 1133 * (All a bit silly if we're only allowing 1 open but..) 1134 */ 1135 ststart(st->sc_periph); 1136 1137 splx(s); 1138 return; 1139 bad: 1140 bp->b_flags |= B_ERROR; 1141 done: 1142 /* 1143 * Correctly set the buf to indicate a completed xfer 1144 */ 1145 bp->b_resid = bp->b_bcount; 1146 biodone(bp); 1147 return; 1148 } 1149 1150 /* 1151 * ststart looks to see if there is a buf waiting for the device 1152 * and that the device is not already busy. If both are true, 1153 * It dequeues the buf and creates a scsi command to perform the 1154 * transfer required. The transfer request will call scsipi_done 1155 * on completion, which will in turn call this routine again 1156 * so that the next queued transfer is performed. 1157 * The bufs are queued by the strategy routine (ststrategy) 1158 * 1159 * This routine is also called after other non-queued requests 1160 * have been made of the scsi driver, to ensure that the queue 1161 * continues to be drained. 1162 * ststart() is called at splbio 1163 */ 1164 static void 1165 ststart(struct scsipi_periph *periph) 1166 { 1167 struct st_softc *st = (void *)periph->periph_dev; 1168 struct buf *bp; 1169 struct scsi_rw_tape cmd; 1170 struct scsipi_xfer *xs; 1171 int flags, error; 1172 1173 SC_DEBUG(periph, SCSIPI_DB2, ("ststart ")); 1174 /* 1175 * See if there is a buf to do and we are not already 1176 * doing one 1177 */ 1178 while (periph->periph_active < periph->periph_openings) { 1179 /* if a special awaits, let it proceed first */ 1180 if (periph->periph_flags & PERIPH_WAITING) { 1181 periph->periph_flags &= ~PERIPH_WAITING; 1182 wakeup((caddr_t)periph); 1183 return; 1184 } 1185 1186 /* 1187 * If the device has been unmounted by the user 1188 * then throw away all requests until done. 1189 */ 1190 if (__predict_false((st->flags & ST_MOUNTED) == 0 || 1191 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0)) { 1192 if ((bp = BUFQ_GET(&st->buf_queue)) != NULL) { 1193 /* make sure that one implies the other.. */ 1194 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 1195 bp->b_flags |= B_ERROR; 1196 bp->b_error = EIO; 1197 bp->b_resid = bp->b_bcount; 1198 biodone(bp); 1199 continue; 1200 } else { 1201 return; 1202 } 1203 } 1204 1205 if ((bp = BUFQ_PEEK(&st->buf_queue)) == NULL) 1206 return; 1207 1208 /* 1209 * only FIXEDBLOCK devices have pending I/O or space operations. 1210 */ 1211 if (st->flags & ST_FIXEDBLOCKS) { 1212 /* 1213 * If we are at a filemark but have not reported it yet 1214 * then we should report it now 1215 */ 1216 if (st->flags & ST_AT_FILEMARK) { 1217 if ((bp->b_flags & B_READ) == B_WRITE) { 1218 /* 1219 * Handling of ST_AT_FILEMARK in 1220 * st_space will fill in the right file 1221 * mark count. 1222 * Back up over filemark 1223 */ 1224 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1225 BUFQ_GET(&st->buf_queue); 1226 bp->b_flags |= B_ERROR; 1227 bp->b_error = EIO; 1228 biodone(bp); 1229 continue; 1230 } 1231 } else { 1232 BUFQ_GET(&st->buf_queue); 1233 bp->b_resid = bp->b_bcount; 1234 bp->b_error = 0; 1235 bp->b_flags &= ~B_ERROR; 1236 st->flags &= ~ST_AT_FILEMARK; 1237 biodone(bp); 1238 continue; /* seek more work */ 1239 } 1240 } 1241 } 1242 /* 1243 * If we are at EOM but have not reported it 1244 * yet then we should report it now. 1245 */ 1246 if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { 1247 BUFQ_GET(&st->buf_queue); 1248 bp->b_resid = bp->b_bcount; 1249 if (st->flags & ST_EIO_PENDING) { 1250 bp->b_error = EIO; 1251 bp->b_flags |= B_ERROR; 1252 } 1253 st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); 1254 biodone(bp); 1255 continue; /* seek more work */ 1256 } 1257 1258 /* 1259 * Fill out the scsi command 1260 */ 1261 memset(&cmd, 0, sizeof(cmd)); 1262 flags = XS_CTL_NOSLEEP | XS_CTL_ASYNC; 1263 if ((bp->b_flags & B_READ) == B_WRITE) { 1264 cmd.opcode = WRITE; 1265 st->flags &= ~ST_FM_WRITTEN; 1266 flags |= XS_CTL_DATA_OUT; 1267 } else { 1268 cmd.opcode = READ; 1269 flags |= XS_CTL_DATA_IN; 1270 } 1271 1272 /* 1273 * Handle "fixed-block-mode" tape drives by using the 1274 * block count instead of the length. 1275 */ 1276 if (st->flags & ST_FIXEDBLOCKS) { 1277 cmd.byte2 |= SRW_FIXED; 1278 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1279 } else 1280 _lto3b(bp->b_bcount, cmd.len); 1281 1282 /* 1283 * Clear 'position updated' indicator 1284 */ 1285 st->flags &= ~ST_POSUPDATED; 1286 1287 /* 1288 * go ask the adapter to do all this for us 1289 */ 1290 xs = scsipi_make_xs(periph, 1291 (struct scsipi_generic *)&cmd, sizeof(cmd), 1292 (u_char *)bp->b_data, bp->b_bcount, 1293 0, ST_IO_TIME, bp, flags); 1294 if (__predict_false(xs == NULL)) { 1295 /* 1296 * out of memory. Keep this buffer in the queue, and 1297 * retry later. 1298 */ 1299 callout_reset(&st->sc_callout, hz / 2, strestart, 1300 periph); 1301 return; 1302 } 1303 /* 1304 * need to dequeue the buffer before queuing the command, 1305 * because cdstart may be called recursively from the 1306 * HBA driver 1307 */ 1308 #ifdef DIAGNOSTIC 1309 if (BUFQ_GET(&st->buf_queue) != bp) 1310 panic("ststart(): dequeued wrong buf"); 1311 #else 1312 BUFQ_GET(&st->buf_queue); 1313 #endif 1314 error = scsipi_execute_xs(xs); 1315 /* with a scsipi_xfer preallocated, scsipi_command can't fail */ 1316 KASSERT(error == 0); 1317 } /* go back and see if we can cram more work in.. */ 1318 } 1319 1320 static void 1321 strestart(void *v) 1322 { 1323 int s = splbio(); 1324 ststart((struct scsipi_periph *)v); 1325 splx(s); 1326 } 1327 1328 1329 static void 1330 stdone(struct scsipi_xfer *xs, int error) 1331 { 1332 struct st_softc *st = (void *)xs->xs_periph->periph_dev; 1333 struct buf *bp = xs->bp; 1334 1335 if (bp) { 1336 bp->b_error = error; 1337 bp->b_resid = xs->resid; 1338 if (error) 1339 bp->b_flags |= B_ERROR; 1340 1341 if ((bp->b_flags & B_READ) == B_WRITE) 1342 st->flags |= ST_WRITTEN; 1343 else 1344 st->flags &= ~ST_WRITTEN; 1345 #if NRND > 0 1346 rnd_add_uint32(&st->rnd_source, bp->b_blkno); 1347 #endif 1348 1349 if ((st->flags & ST_POSUPDATED) == 0) { 1350 if (error) { 1351 st->fileno = st->blkno = -1; 1352 } else if (st->blkno != -1) { 1353 if (st->flags & ST_FIXEDBLOCKS) 1354 st->blkno += 1355 (bp->b_bcount / st->blksize); 1356 else 1357 st->blkno++; 1358 } 1359 } 1360 1361 biodone(bp); 1362 } 1363 } 1364 1365 static int 1366 stread(dev_t dev, struct uio *uio, int iomode) 1367 { 1368 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1369 1370 return (physio(ststrategy, NULL, dev, B_READ, 1371 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1372 } 1373 1374 static int 1375 stwrite(dev_t dev, struct uio *uio, int iomode) 1376 { 1377 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1378 1379 return (physio(ststrategy, NULL, dev, B_WRITE, 1380 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1381 } 1382 1383 /* 1384 * Perform special action on behalf of the user; 1385 * knows about the internals of this device 1386 */ 1387 static int 1388 stioctl(dev_t dev, u_long cmd, caddr_t arg, int flag, struct proc *p) 1389 { 1390 int error = 0; 1391 int unit; 1392 int number, nmarks, dsty; 1393 int flags; 1394 struct st_softc *st; 1395 int hold_blksize; 1396 u_int8_t hold_density; 1397 struct mtop *mt = (struct mtop *) arg; 1398 1399 /* 1400 * Find the device that the user is talking about 1401 */ 1402 flags = 0; /* give error messages, act on errors etc. */ 1403 unit = STUNIT(dev); 1404 dsty = STDSTY(dev); 1405 st = st_cd.cd_devs[unit]; 1406 hold_blksize = st->blksize; 1407 hold_density = st->density; 1408 1409 switch ((u_int) cmd) { 1410 1411 case MTIOCGET: { 1412 struct mtget *g = (struct mtget *) arg; 1413 /* 1414 * (to get the current state of READONLY) 1415 */ 1416 error = st->ops(st, ST_OPS_MODESENSE, XS_CTL_SILENT); 1417 if (error) { 1418 /* 1419 * Ignore the error if in control mode; 1420 * this is mandated by st(4). 1421 */ 1422 if (STMODE(dev) != CTRL_MODE) 1423 break; 1424 error = 0; 1425 } 1426 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("[ioctl: get status]\n")); 1427 memset(g, 0, sizeof(struct mtget)); 1428 g->mt_type = 0x7; /* Ultrix compat *//*? */ 1429 g->mt_blksiz = st->blksize; 1430 g->mt_density = st->density; 1431 g->mt_mblksiz[0] = st->modes[0].blksize; 1432 g->mt_mblksiz[1] = st->modes[1].blksize; 1433 g->mt_mblksiz[2] = st->modes[2].blksize; 1434 g->mt_mblksiz[3] = st->modes[3].blksize; 1435 g->mt_mdensity[0] = st->modes[0].density; 1436 g->mt_mdensity[1] = st->modes[1].density; 1437 g->mt_mdensity[2] = st->modes[2].density; 1438 g->mt_mdensity[3] = st->modes[3].density; 1439 g->mt_fileno = st->fileno; 1440 g->mt_blkno = st->blkno; 1441 if (st->flags & ST_READONLY) 1442 g->mt_dsreg |= MT_DS_RDONLY; 1443 if (st->flags & ST_MOUNTED) 1444 g->mt_dsreg |= MT_DS_MOUNTED; 1445 g->mt_resid = st->mt_resid; 1446 g->mt_erreg = st->mt_erreg; 1447 /* 1448 * clear latched errors. 1449 */ 1450 st->mt_resid = 0; 1451 st->mt_erreg = 0; 1452 st->asc = 0; 1453 st->ascq = 0; 1454 break; 1455 } 1456 case MTIOCTOP: { 1457 1458 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1459 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1460 mt->mt_count)); 1461 1462 /* compat: in U*x it is a short */ 1463 number = mt->mt_count; 1464 switch ((short) (mt->mt_op)) { 1465 case MTWEOF: /* write an end-of-file record */ 1466 error = st_write_filemarks(st, number, flags); 1467 break; 1468 case MTBSF: /* backward space file */ 1469 number = -number; 1470 case MTFSF: /* forward space file */ 1471 error = st_check_eod(st, FALSE, &nmarks, flags); 1472 if (!error) 1473 error = st_space(st, number - nmarks, 1474 SP_FILEMARKS, flags); 1475 break; 1476 case MTBSR: /* backward space record */ 1477 number = -number; 1478 case MTFSR: /* forward space record */ 1479 error = st_check_eod(st, TRUE, &nmarks, flags); 1480 if (!error) 1481 error = st_space(st, number, SP_BLKS, flags); 1482 break; 1483 case MTREW: /* rewind */ 1484 error = st_rewind(st, 0, flags); 1485 break; 1486 case MTOFFL: /* rewind and put the drive offline */ 1487 st_unmount(st, EJECT); 1488 break; 1489 case MTNOP: /* no operation, sets status only */ 1490 break; 1491 case MTRETEN: /* retension the tape */ 1492 error = st_load(st, LD_RETENSION, flags); 1493 if (!error) 1494 error = st_load(st, LD_LOAD, flags); 1495 break; 1496 case MTEOM: /* forward space to end of media */ 1497 error = st_check_eod(st, FALSE, &nmarks, flags); 1498 if (!error) 1499 error = st_space(st, 1, SP_EOM, flags); 1500 break; 1501 case MTCACHE: /* enable controller cache */ 1502 st->flags &= ~ST_DONTBUFFER; 1503 goto try_new_value; 1504 case MTNOCACHE: /* disable controller cache */ 1505 st->flags |= ST_DONTBUFFER; 1506 goto try_new_value; 1507 case MTERASE: /* erase volume */ 1508 error = st_erase(st, number, flags); 1509 break; 1510 case MTSETBSIZ: /* Set block size for device */ 1511 #ifdef NOTYET 1512 if (!(st->flags & ST_NEW_MOUNT)) { 1513 uprintf("re-mount tape before changing blocksize"); 1514 error = EINVAL; 1515 break; 1516 } 1517 #endif 1518 if (number == 0) 1519 st->flags &= ~ST_FIXEDBLOCKS; 1520 else { 1521 if ((st->blkmin || st->blkmax) && 1522 (number < st->blkmin || 1523 number > st->blkmax)) { 1524 error = EINVAL; 1525 break; 1526 } 1527 st->flags |= ST_FIXEDBLOCKS; 1528 } 1529 st->blksize = number; 1530 st->flags |= ST_BLOCK_SET; /*XXX */ 1531 goto try_new_value; 1532 1533 case MTSETDNSTY: /* Set density for device and mode */ 1534 /* 1535 * Any number >= 0 and <= 0xff is legal. Numbers 1536 * above 0x80 are 'vendor unique'. 1537 */ 1538 if (number < 0 || number > 255) { 1539 error = EINVAL; 1540 break; 1541 } else 1542 st->density = number; 1543 goto try_new_value; 1544 1545 case MTCMPRESS: 1546 error = st->ops(st, (number == 0) ? 1547 ST_OPS_CMPRSS_OFF : ST_OPS_CMPRSS_ON, 1548 XS_CTL_SILENT); 1549 break; 1550 1551 case MTEWARN: 1552 if (number) 1553 st->flags |= ST_EARLYWARN; 1554 else 1555 st->flags &= ~ST_EARLYWARN; 1556 break; 1557 1558 default: 1559 error = EINVAL; 1560 } 1561 break; 1562 } 1563 case MTIOCIEOT: 1564 case MTIOCEEOT: 1565 break; 1566 1567 case MTIOCRDSPOS: 1568 error = st_rdpos(st, 0, (u_int32_t *) arg); 1569 break; 1570 1571 case MTIOCRDHPOS: 1572 error = st_rdpos(st, 1, (u_int32_t *) arg); 1573 break; 1574 1575 case MTIOCSLOCATE: 1576 error = st_setpos(st, 0, (u_int32_t *) arg); 1577 break; 1578 1579 case MTIOCHLOCATE: 1580 error = st_setpos(st, 1, (u_int32_t *) arg); 1581 break; 1582 1583 1584 default: 1585 error = scsipi_do_ioctl(st->sc_periph, dev, cmd, arg, 1586 flag, p); 1587 break; 1588 } 1589 return (error); 1590 /*-----------------------------*/ 1591 try_new_value: 1592 /* 1593 * Check that the mode being asked for is aggreeable to the 1594 * drive. If not, put it back the way it was. 1595 * 1596 * If in control mode, we can make (persistent) mode changes 1597 * even if no medium is loaded (see st(4)). 1598 */ 1599 if ((STMODE(dev) != CTRL_MODE || (st->flags & ST_MOUNTED) != 0) && 1600 (error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 1601 /* put it back as it was */ 1602 printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); 1603 st->density = hold_density; 1604 st->blksize = hold_blksize; 1605 if (st->blksize) 1606 st->flags |= ST_FIXEDBLOCKS; 1607 else 1608 st->flags &= ~ST_FIXEDBLOCKS; 1609 return (error); 1610 } 1611 /* 1612 * As the drive liked it, if we are setting a new default, 1613 * set it into the structures as such. 1614 * 1615 * The means for deciding this are not finalised yet- but 1616 * if the device was opened in Control Mode, the values 1617 * are persistent now across mounts. 1618 */ 1619 if (STMODE(dev) == CTRL_MODE) { 1620 switch ((short) (mt->mt_op)) { 1621 case MTSETBSIZ: 1622 st->modes[dsty].blksize = st->blksize; 1623 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1624 break; 1625 case MTSETDNSTY: 1626 st->modes[dsty].density = st->density; 1627 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1628 break; 1629 } 1630 } 1631 return (0); 1632 } 1633 1634 /* 1635 * Do a synchronous read. 1636 */ 1637 static int 1638 st_read(struct st_softc *st, char *buf, int size, int flags) 1639 { 1640 struct scsi_rw_tape cmd; 1641 1642 /* 1643 * If it's a null transfer, return immediatly 1644 */ 1645 if (size == 0) 1646 return (0); 1647 memset(&cmd, 0, sizeof(cmd)); 1648 cmd.opcode = READ; 1649 if (st->flags & ST_FIXEDBLOCKS) { 1650 cmd.byte2 |= SRW_FIXED; 1651 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1652 cmd.len); 1653 } else 1654 _lto3b(size, cmd.len); 1655 return (scsipi_command(st->sc_periph, 1656 (void *)&cmd, sizeof(cmd), (void *)buf, size, 0, ST_IO_TIME, NULL, 1657 flags | XS_CTL_DATA_IN)); 1658 } 1659 1660 /* 1661 * issue an erase command 1662 */ 1663 static int 1664 st_erase(struct st_softc *st, int full, int flags) 1665 { 1666 int tmo; 1667 struct scsi_erase cmd; 1668 1669 /* 1670 * Full erase means set LONG bit in erase command, which asks 1671 * the drive to erase the entire unit. Without this bit, we're 1672 * asking the drive to write an erase gap. 1673 */ 1674 memset(&cmd, 0, sizeof(cmd)); 1675 cmd.opcode = ERASE; 1676 if (full) { 1677 cmd.byte2 = SE_LONG; 1678 tmo = ST_SPC_TIME; 1679 } else { 1680 tmo = ST_IO_TIME; 1681 } 1682 1683 /* 1684 * XXX We always do this asynchronously, for now, unless the device 1685 * has the ST_Q_ERASE_NOIMM quirk. How long should we wait if we 1686 * want to (eventually) to it synchronously? 1687 */ 1688 if ((st->quirks & ST_Q_ERASE_NOIMM) == 0) 1689 cmd.byte2 |= SE_IMMED; 1690 1691 return (scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1692 ST_RETRIES, tmo, NULL, flags)); 1693 } 1694 1695 /* 1696 * skip N blocks/filemarks/seq filemarks/eom 1697 */ 1698 static int 1699 st_space(struct st_softc *st, int number, u_int what, int flags) 1700 { 1701 struct scsi_space cmd; 1702 int error; 1703 1704 switch (what) { 1705 case SP_BLKS: 1706 if (st->flags & ST_PER_ACTION) { 1707 if (number > 0) { 1708 st->flags &= ~ST_PER_ACTION; 1709 return (EIO); 1710 } else if (number < 0) { 1711 if (st->flags & ST_AT_FILEMARK) { 1712 /* 1713 * Handling of ST_AT_FILEMARK 1714 * in st_space will fill in the 1715 * right file mark count. 1716 */ 1717 error = st_space(st, 0, SP_FILEMARKS, 1718 flags); 1719 if (error) 1720 return (error); 1721 } 1722 if (st->flags & ST_BLANK_READ) { 1723 st->flags &= ~ST_BLANK_READ; 1724 return (EIO); 1725 } 1726 st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); 1727 } 1728 } 1729 break; 1730 case SP_FILEMARKS: 1731 if (st->flags & ST_EIO_PENDING) { 1732 if (number > 0) { 1733 /* pretend we just discovered the error */ 1734 st->flags &= ~ST_EIO_PENDING; 1735 return (EIO); 1736 } else if (number < 0) { 1737 /* back away from the error */ 1738 st->flags &= ~ST_EIO_PENDING; 1739 } 1740 } 1741 if (st->flags & ST_AT_FILEMARK) { 1742 st->flags &= ~ST_AT_FILEMARK; 1743 number--; 1744 } 1745 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 1746 /* back away from unwritten tape */ 1747 st->flags &= ~ST_BLANK_READ; 1748 number++; /* XXX dubious */ 1749 } 1750 break; 1751 case SP_EOM: 1752 if (st->flags & ST_EOM_PENDING) { 1753 /* we're already there */ 1754 st->flags &= ~ST_EOM_PENDING; 1755 return (0); 1756 } 1757 if (st->flags & ST_EIO_PENDING) { 1758 /* pretend we just discovered the error */ 1759 st->flags &= ~ST_EIO_PENDING; 1760 return (EIO); 1761 } 1762 if (st->flags & ST_AT_FILEMARK) 1763 st->flags &= ~ST_AT_FILEMARK; 1764 break; 1765 } 1766 if (number == 0) 1767 return (0); 1768 1769 memset(&cmd, 0, sizeof(cmd)); 1770 cmd.opcode = SPACE; 1771 cmd.byte2 = what; 1772 _lto3b(number, cmd.number); 1773 1774 st->flags &= ~ST_POSUPDATED; 1775 st->last_ctl_resid = 0; 1776 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1777 0, ST_SPC_TIME, NULL, flags); 1778 1779 if (error == 0 && (st->flags & ST_POSUPDATED) == 0) { 1780 number = number - st->last_ctl_resid; 1781 if (what == SP_BLKS) { 1782 if (st->blkno != -1) { 1783 st->blkno += number; 1784 } 1785 } else if (what == SP_FILEMARKS) { 1786 if (st->fileno != -1) { 1787 st->fileno += number; 1788 if (number > 0) { 1789 st->blkno = 0; 1790 } else if (number < 0) { 1791 st->blkno = -1; 1792 } 1793 } 1794 } else if (what == SP_EOM) { 1795 /* 1796 * This loses us relative position. 1797 */ 1798 st->fileno = st->blkno = -1; 1799 } 1800 } 1801 return (error); 1802 } 1803 1804 /* 1805 * write N filemarks 1806 */ 1807 static int 1808 st_write_filemarks(struct st_softc *st, int number, int flags) 1809 { 1810 int error; 1811 struct scsi_write_filemarks cmd; 1812 1813 /* 1814 * It's hard to write a negative number of file marks. 1815 * Don't try. 1816 */ 1817 if (number < 0) 1818 return (EINVAL); 1819 switch (number) { 1820 case 0: /* really a command to sync the drive's buffers */ 1821 break; 1822 case 1: 1823 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 1824 st->flags &= ~ST_WRITTEN; 1825 else 1826 st->flags |= ST_FM_WRITTEN; 1827 st->flags &= ~ST_PER_ACTION; 1828 break; 1829 default: 1830 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 1831 } 1832 1833 memset(&cmd, 0, sizeof(cmd)); 1834 cmd.opcode = WRITE_FILEMARKS; 1835 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1836 cmd.byte2 = SR_IMMED; 1837 /* 1838 * The ATAPI Onstream DI-30 doesn't support writing filemarks, but 1839 * WRITE_FILEMARKS is still used to flush the buffer 1840 */ 1841 if ((st->quirks & ST_Q_NOFILEMARKS) == 0) 1842 _lto3b(number, cmd.number); 1843 1844 /* XXX WE NEED TO BE ABLE TO GET A RESIDIUAL XXX */ 1845 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1846 0, ST_IO_TIME * 4, NULL, flags); 1847 if (error == 0 && st->fileno != -1) { 1848 st->fileno += number; 1849 } 1850 return (error); 1851 } 1852 1853 /* 1854 * Make sure the right number of file marks is on tape if the 1855 * tape has been written. If the position argument is true, 1856 * leave the tape positioned where it was originally. 1857 * 1858 * nmarks returns the number of marks to skip (or, if position 1859 * true, which were skipped) to get back original position. 1860 */ 1861 static int 1862 st_check_eod(struct st_softc *st, boolean position, int *nmarks, int flags) 1863 { 1864 int error; 1865 1866 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 1867 default: 1868 *nmarks = 0; 1869 return (0); 1870 case ST_WRITTEN: 1871 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 1872 *nmarks = 1; 1873 break; 1874 case ST_WRITTEN | ST_2FM_AT_EOD: 1875 *nmarks = 2; 1876 } 1877 error = st_write_filemarks(st, *nmarks, flags); 1878 if (position && !error) 1879 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 1880 return (error); 1881 } 1882 1883 /* 1884 * load/unload/retension 1885 */ 1886 static int 1887 st_load(struct st_softc *st, u_int type, int flags) 1888 { 1889 int error; 1890 struct scsi_load cmd; 1891 1892 if (type != LD_LOAD) { 1893 int nmarks; 1894 1895 error = st_check_eod(st, FALSE, &nmarks, flags); 1896 if (error) { 1897 printf("%s: failed to write closing filemarks at " 1898 "unload, errno=%d\n", st->sc_dev.dv_xname, error); 1899 return (error); 1900 } 1901 } 1902 if (st->quirks & ST_Q_IGNORE_LOADS) { 1903 if (type == LD_LOAD) { 1904 /* 1905 * If we ignore loads, at least we should try a rewind. 1906 */ 1907 return st_rewind(st, 0, flags); 1908 } 1909 /* otherwise, we should do what's asked of us */ 1910 } 1911 1912 memset(&cmd, 0, sizeof(cmd)); 1913 cmd.opcode = LOAD; 1914 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1915 cmd.byte2 = SR_IMMED; 1916 cmd.how = type; 1917 1918 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1919 ST_RETRIES, ST_SPC_TIME, NULL, flags); 1920 if (error) { 1921 printf("%s: error %d in st_load (op %d)\n", 1922 st->sc_dev.dv_xname, error, type); 1923 } 1924 return (error); 1925 } 1926 1927 /* 1928 * Rewind the device 1929 */ 1930 static int 1931 st_rewind(struct st_softc *st, u_int immediate, int flags) 1932 { 1933 struct scsi_rewind cmd; 1934 int error; 1935 int nmarks; 1936 1937 error = st_check_eod(st, FALSE, &nmarks, flags); 1938 if (error) { 1939 printf("%s: failed to write closing filemarks at " 1940 "rewind, errno=%d\n", st->sc_dev.dv_xname, error); 1941 return (error); 1942 } 1943 st->flags &= ~ST_PER_ACTION; 1944 1945 /* 1946 * ATAPI tapes always need immediate to be set 1947 */ 1948 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1949 immediate = SR_IMMED; 1950 1951 memset(&cmd, 0, sizeof(cmd)); 1952 cmd.opcode = REWIND; 1953 cmd.byte2 = immediate; 1954 1955 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1956 ST_RETRIES, immediate ? ST_CTL_TIME: ST_SPC_TIME, NULL, flags); 1957 if (error) { 1958 printf("%s: error %d trying to rewind\n", 1959 st->sc_dev.dv_xname, error); 1960 /* lost position */ 1961 st->fileno = st->blkno = -1; 1962 } else { 1963 st->fileno = st->blkno = 0; 1964 } 1965 return (error); 1966 } 1967 1968 static int 1969 st_rdpos(struct st_softc *st, int hard, u_int32_t *blkptr) 1970 { 1971 int error; 1972 u_int8_t posdata[20]; 1973 struct scsi_tape_read_position cmd; 1974 1975 /* 1976 * We try and flush any buffered writes here if we were writing 1977 * and we're trying to get hardware block position. It eats 1978 * up performance substantially, but I'm wary of drive firmware. 1979 * 1980 * I think that *logical* block position is probably okay- 1981 * but hardware block position might have to wait for data 1982 * to hit media to be valid. Caveat Emptor. 1983 */ 1984 1985 if (hard && (st->flags & ST_WRITTEN)) { 1986 /* 1987 * First flush any pending writes... 1988 */ 1989 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 1990 /* 1991 * The latter case is for 'write protected' tapes 1992 * which are too stupid to recognize a zero count 1993 * for writing filemarks as a no-op. 1994 */ 1995 if (error != 0 && error != EACCES && error != EROFS) 1996 return (error); 1997 } 1998 1999 memset(&cmd, 0, sizeof(cmd)); 2000 memset(&posdata, 0, sizeof(posdata)); 2001 cmd.opcode = READ_POSITION; 2002 if (hard) 2003 cmd.byte1 = 1; 2004 2005 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 2006 (void *)&posdata, sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, 2007 XS_CTL_SILENT | XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); 2008 2009 if (error == 0) { 2010 #if 0 2011 printf("posdata:"); 2012 for (hard = 0; hard < sizeof(posdata); hard++) 2013 printf("%02x ", posdata[hard] & 0xff); 2014 printf("\n"); 2015 #endif 2016 if (posdata[0] & 0x4) /* Block Position Unknown */ 2017 error = EINVAL; 2018 else 2019 *blkptr = _4btol(&posdata[4]); 2020 } 2021 return (error); 2022 } 2023 2024 static int 2025 st_setpos(struct st_softc *st, int hard, u_int32_t *blkptr) 2026 { 2027 int error; 2028 struct scsi_tape_locate cmd; 2029 2030 /* 2031 * We used to try and flush any buffered writes here. 2032 * Now we push this onto user applications to either 2033 * flush the pending writes themselves (via a zero count 2034 * WRITE FILEMARKS command) or they can trust their tape 2035 * drive to do this correctly for them. 2036 * 2037 * There are very ugly performance limitations otherwise. 2038 */ 2039 2040 memset(&cmd, 0, sizeof(cmd)); 2041 cmd.opcode = LOCATE; 2042 if (hard) 2043 cmd.byte2 = 1 << 2; 2044 _lto4b(*blkptr, cmd.blkaddr); 2045 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 2046 ST_RETRIES, ST_SPC_TIME, NULL, 0); 2047 /* 2048 * Note file && block number position now unknown (if 2049 * these things ever start being maintained in this driver) 2050 */ 2051 st->fileno = st->blkno = -1; 2052 return (error); 2053 } 2054 2055 2056 /* 2057 * Look at the returned sense and act on the error and determine 2058 * the unix error number to pass back..., 0 (== report no error), 2059 * -1 = retry the operation, -2 continue error processing. 2060 */ 2061 static int 2062 st_interpret_sense(struct scsipi_xfer *xs) 2063 { 2064 struct scsipi_periph *periph = xs->xs_periph; 2065 struct scsi_sense_data *sense = &xs->sense.scsi_sense; 2066 struct buf *bp = xs->bp; 2067 struct st_softc *st = (void *)periph->periph_dev; 2068 int retval = EJUSTRETURN; 2069 int doprint = ((xs->xs_control & XS_CTL_SILENT) == 0); 2070 u_int8_t key; 2071 int32_t info; 2072 2073 /* 2074 * If it isn't a extended or extended/deferred error, let 2075 * the generic code handle it. 2076 */ 2077 if ((sense->response_code & SSD_RCODE_VALID) == 0 || 2078 (SSD_RCODE(sense->response_code) != SSD_RCODE_CURRENT && 2079 SSD_RCODE(sense->response_code) != SSD_RCODE_DEFERRED)) 2080 return (retval); 2081 2082 if (sense->response_code & SSD_RCODE_VALID) 2083 info = _4btol(sense->info); 2084 else 2085 info = (st->flags & ST_FIXEDBLOCKS) ? 2086 xs->datalen / st->blksize : xs->datalen; 2087 key = SSD_SENSE_KEY(sense->flags); 2088 st->mt_erreg = key; 2089 st->asc = sense->asc; 2090 st->ascq = sense->ascq; 2091 st->mt_resid = (short) info; 2092 2093 if (key == SKEY_NOT_READY && st->asc == 0x4 && st->ascq == 0x1) { 2094 /* Not Ready, Logical Unit Is in Process Of Becoming Ready */ 2095 if (!callout_pending(&periph->periph_callout)) 2096 scsipi_periph_freeze(periph, 1); 2097 callout_reset(&periph->periph_callout, 2098 hz, scsipi_periph_timed_thaw, periph); 2099 return (ERESTART); 2100 } 2101 2102 /* 2103 * If the device is not open yet, let generic handle 2104 */ 2105 if ((periph->periph_flags & PERIPH_OPEN) == 0) { 2106 return (retval); 2107 } 2108 2109 xs->resid = info; 2110 if (st->flags & ST_FIXEDBLOCKS) { 2111 if (bp) { 2112 xs->resid *= st->blksize; 2113 st->last_io_resid = xs->resid; 2114 } else { 2115 st->last_ctl_resid = xs->resid; 2116 } 2117 if (key == SKEY_VOLUME_OVERFLOW) { 2118 st->flags |= ST_EIO_PENDING; 2119 if (bp) 2120 bp->b_resid = xs->resid; 2121 } else if (sense->flags & SSD_EOM) { 2122 if ((st->flags & ST_EARLYWARN) == 0) 2123 st->flags |= ST_EIO_PENDING; 2124 st->flags |= ST_EOM_PENDING; 2125 if (bp) { 2126 #if 0 2127 bp->b_resid = xs->resid; 2128 #else 2129 /* 2130 * Grotesque as it seems, the few times 2131 * I've actually seen a non-zero resid, 2132 * the tape drive actually lied and had 2133 * written all the data! 2134 */ 2135 bp->b_resid = 0; 2136 #endif 2137 } 2138 } 2139 if (sense->flags & SSD_FILEMARK) { 2140 st->flags |= ST_AT_FILEMARK; 2141 if (bp) 2142 bp->b_resid = xs->resid; 2143 if (st->fileno != (daddr_t) -1) { 2144 st->fileno++; 2145 st->blkno = 0; 2146 st->flags |= ST_POSUPDATED; 2147 } 2148 } 2149 if (sense->flags & SSD_ILI) { 2150 st->flags |= ST_EIO_PENDING; 2151 if (bp) 2152 bp->b_resid = xs->resid; 2153 if (sense->response_code & SSD_RCODE_VALID && 2154 (xs->xs_control & XS_CTL_SILENT) == 0) 2155 printf("%s: block wrong size, %d blocks " 2156 "residual\n", st->sc_dev.dv_xname, info); 2157 2158 /* 2159 * This quirk code helps the drive read 2160 * the first tape block, regardless of 2161 * format. That is required for these 2162 * drives to return proper MODE SENSE 2163 * information. 2164 */ 2165 if ((st->quirks & ST_Q_SENSE_HELP) && 2166 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 2167 st->blksize -= 512; 2168 else if ((st->flags & ST_POSUPDATED) == 0) { 2169 if (st->blkno != (daddr_t) -1) { 2170 st->blkno += 2171 (xs->datalen / st->blksize); 2172 st->flags |= ST_POSUPDATED; 2173 } 2174 } 2175 } 2176 /* 2177 * If data wanted and no data was transferred, do it immediately 2178 */ 2179 if (xs->datalen && xs->resid >= xs->datalen) { 2180 if (st->flags & ST_EIO_PENDING) 2181 return (EIO); 2182 if (st->flags & ST_AT_FILEMARK) { 2183 if (bp) 2184 bp->b_resid = xs->resid; 2185 return (0); 2186 } 2187 } 2188 } else { /* must be variable mode */ 2189 if (bp) { 2190 st->last_io_resid = xs->resid; 2191 } else { 2192 st->last_ctl_resid = xs->resid; 2193 } 2194 if (sense->flags & SSD_EOM) { 2195 /* 2196 * The current semantics of this 2197 * driver requires EOM detection 2198 * to return EIO unless early 2199 * warning detection is enabled 2200 * for variable mode (this is always 2201 * on for fixed block mode). 2202 */ 2203 if (st->flags & ST_EARLYWARN) { 2204 st->flags |= ST_EOM_PENDING; 2205 retval = 0; 2206 } else { 2207 retval = EIO; 2208 } 2209 2210 /* 2211 * If it's an unadorned EOM detection, 2212 * suppress printing an error. 2213 */ 2214 if (key == SKEY_NO_SENSE) { 2215 doprint = 0; 2216 } 2217 } else if (sense->flags & SSD_FILEMARK) { 2218 retval = 0; 2219 if (st->fileno != (daddr_t) -1) { 2220 st->fileno++; 2221 st->blkno = 0; 2222 st->flags |= ST_POSUPDATED; 2223 } 2224 } else if (sense->flags & SSD_ILI) { 2225 if (info < 0) { 2226 /* 2227 * The tape record was bigger than the read 2228 * we issued. 2229 */ 2230 if ((xs->xs_control & XS_CTL_SILENT) == 0) { 2231 printf("%s: %d-byte tape record too big" 2232 " for %d-byte user buffer\n", 2233 st->sc_dev.dv_xname, 2234 xs->datalen - info, xs->datalen); 2235 } 2236 retval = EIO; 2237 } else { 2238 retval = 0; 2239 if (st->blkno != (daddr_t) -1) { 2240 st->blkno++; 2241 st->flags |= ST_POSUPDATED; 2242 } 2243 } 2244 } 2245 if (bp) 2246 bp->b_resid = info; 2247 } 2248 2249 #ifndef SCSIPI_DEBUG 2250 if (retval == 0 && key == SKEY_NO_SENSE) 2251 doprint = 0; 2252 #endif 2253 if (key == SKEY_BLANK_CHECK) { 2254 /* 2255 * This quirk code helps the drive read the 2256 * first tape block, regardless of format. That 2257 * is required for these drives to return proper 2258 * MODE SENSE information. 2259 */ 2260 if ((st->quirks & ST_Q_SENSE_HELP) && 2261 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 2262 /* still starting */ 2263 st->blksize -= 512; 2264 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 2265 st->flags |= ST_BLANK_READ; 2266 xs->resid = xs->datalen; 2267 if (bp) { 2268 bp->b_resid = xs->resid; 2269 /* return an EOF */ 2270 } 2271 retval = 0; 2272 /* lost position */ 2273 st->fileno = st->blkno = -1; 2274 } 2275 } 2276 2277 /* 2278 * If generic sense processing will continue, we should not 2279 * print sense info here. 2280 */ 2281 if (retval == EJUSTRETURN) 2282 doprint = 0; 2283 2284 if (doprint) { 2285 #ifdef SCSIVERBOSE 2286 scsipi_print_sense(xs, 0); 2287 #else 2288 scsipi_printaddr(periph); 2289 printf("Sense Key 0x%02x", key); 2290 if ((sense->response_code & SSD_RCODE_VALID) != 0) { 2291 switch (key) { 2292 case SKEY_NOT_READY: 2293 case SKEY_ILLEGAL_REQUEST: 2294 case SKEY_UNIT_ATTENTION: 2295 case SKEY_DATA_PROTECT: 2296 break; 2297 case SKEY_VOLUME_OVERFLOW: 2298 case SKEY_BLANK_CHECK: 2299 printf(", requested size: %d (decimal)", info); 2300 break; 2301 case SKEY_ABORTED_COMMAND: 2302 if (xs->xs_retries) 2303 printf(", retrying"); 2304 printf(", cmd 0x%x, info 0x%x", 2305 xs->cmd->opcode, info); 2306 break; 2307 default: 2308 printf(", info = %d (decimal)", info); 2309 } 2310 } 2311 if (sense->extra_len != 0) { 2312 int n; 2313 printf(", data ="); 2314 for (n = 0; n < sense->extra_len; n++) 2315 printf(" %02x", sense->csi[n]); 2316 } 2317 printf("\n"); 2318 #endif 2319 } 2320 return (retval); 2321 } 2322 2323 /* 2324 * The quirk here is that the drive returns some value to st_mode_sense 2325 * incorrectly until the tape has actually passed by the head. 2326 * 2327 * The method is to set the drive to large fixed-block state (user-specified 2328 * density and 1024-byte blocks), then read and rewind to get it to sense the 2329 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 2330 * work, as a last resort, try variable- length blocks. The result will be 2331 * the ability to do an accurate st_mode_sense. 2332 * 2333 * We know we can do a rewind because we just did a load, which implies rewind. 2334 * Rewind seems preferable to space backward if we have a virgin tape. 2335 * 2336 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 2337 * error processing, both part of st_interpret_sense. 2338 */ 2339 static int 2340 st_touch_tape(struct st_softc *st) 2341 { 2342 char *buf; 2343 int readsize; 2344 int error; 2345 2346 buf = malloc(1024, M_TEMP, M_NOWAIT); 2347 if (buf == NULL) 2348 return (ENOMEM); 2349 2350 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 2351 goto bad; 2352 2353 /* 2354 * If the block size is already known from the 2355 * sense data, use it. Else start probing at 1024. 2356 */ 2357 if (st->media_blksize > 0) 2358 st->blksize = st->media_blksize; 2359 else 2360 st->blksize = 1024; 2361 2362 do { 2363 switch (st->blksize) { 2364 case 512: 2365 case 1024: 2366 readsize = st->blksize; 2367 st->flags |= ST_FIXEDBLOCKS; 2368 break; 2369 default: 2370 readsize = 1; 2371 st->flags &= ~ST_FIXEDBLOCKS; 2372 } 2373 if ((error = st->ops(st, ST_OPS_MODESELECT, XS_CTL_SILENT)) 2374 != 0) { 2375 /* 2376 * The device did not agree with the proposed 2377 * block size. If we exhausted our options, 2378 * return failure, else try another. 2379 */ 2380 if (readsize == 1) 2381 goto bad; 2382 st->blksize -= 512; 2383 continue; 2384 } 2385 st_read(st, buf, readsize, XS_CTL_SILENT); /* XXX */ 2386 if ((error = st_rewind(st, 0, 0)) != 0) { 2387 bad: free(buf, M_TEMP); 2388 return (error); 2389 } 2390 } while (readsize != 1 && readsize > st->blksize); 2391 2392 free(buf, M_TEMP); 2393 return (0); 2394 } 2395 2396 static int 2397 stdump(dev_t dev, daddr_t blkno, caddr_t va, size_t size) 2398 { 2399 2400 /* Not implemented. */ 2401 return (ENXIO); 2402 } 2403
Indexes created Mon Sep 22 05:09:51 GMT 2025