1 /* $NetBSD: st.c,v 1.155 2002/05/05 15:16:31 bouyer Exp $ */ 2 /*- 3 * Copyright (c) 1998 The NetBSD Foundation, Inc. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to The NetBSD Foundation 7 * by Charles M. Hannum. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the NetBSD 20 * Foundation, Inc. and its contributors. 21 * 4. Neither the name of The NetBSD Foundation nor the names of its 22 * contributors may be used to endorse or promote products derived 23 * from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 26 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 /* 39 * Originally written by Julian Elischer (julian@tfs.com) 40 * for TRW Financial Systems for use under the MACH(2.5) operating system. 41 * 42 * TRW Financial Systems, in accordance with their agreement with Carnegie 43 * Mellon University, makes this software available to CMU to distribute 44 * or use in any manner that they see fit as long as this message is kept with 45 * the software. For this reason TFS also grants any other persons or 46 * organisations permission to use or modify this software. 47 * 48 * TFS supplies this software to be publicly redistributed 49 * on the understanding that TFS is not responsible for the correct 50 * functioning of this software in any circumstances. 51 * 52 * Ported to run under 386BSD by Julian Elischer (julian@tfs.com) Sept 1992 53 * major changes by Julian Elischer (julian@jules.dialix.oz.au) May 1993 54 * 55 * A lot of rewhacking done by mjacob (mjacob@nas.nasa.gov). 56 */ 57 58 #include <sys/cdefs.h> 59 __KERNEL_RCSID(0, "$NetBSD: st.c,v 1.155 2002/05/05 15:16:31 bouyer Exp $"); 60 61 #include "opt_scsi.h" 62 63 #include <sys/param.h> 64 #include <sys/systm.h> 65 #include <sys/fcntl.h> 66 #include <sys/errno.h> 67 #include <sys/ioctl.h> 68 #include <sys/malloc.h> 69 #include <sys/buf.h> 70 #include <sys/proc.h> 71 #include <sys/user.h> 72 #include <sys/mtio.h> 73 #include <sys/device.h> 74 #include <sys/conf.h> 75 #include <sys/kernel.h> 76 #include <sys/vnode.h> 77 78 #include <dev/scsipi/scsi_all.h> 79 #include <dev/scsipi/scsi_tape.h> 80 #include <dev/scsipi/stvar.h> 81 82 /* Defines for device specific stuff */ 83 #define DEF_FIXED_BSIZE 512 84 85 #define STMODE(z) ( minor(z) & 0x03) 86 #define STDSTY(z) ((minor(z) >> 2) & 0x03) 87 #define STUNIT(z) ((minor(z) >> 4) ) 88 #define STNMINOR 16 89 90 #define NORMAL_MODE 0 91 #define NOREW_MODE 1 92 #define EJECT_MODE 2 93 #define CTRL_MODE 3 94 95 #define FALSE 0 96 #define TRUE 1 97 98 #ifndef ST_MOUNT_DELAY 99 #define ST_MOUNT_DELAY 0 100 #endif 101 102 /* 103 * Define various devices that we know mis-behave in some way, 104 * and note how they are bad, so we can correct for them 105 */ 106 107 const struct st_quirk_inquiry_pattern st_quirk_patterns[] = { 108 {{T_SEQUENTIAL, T_REMOV, 109 " ", " ", " "}, {0, 0, { 110 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 111 {ST_Q_FORCE_BLKSIZE, 512, QIC_24}, /* minor 4-7 */ 112 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_1600}, /* minor 8-11 */ 113 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_6250} /* minor 12-15 */ 114 }}}, 115 {{T_SEQUENTIAL, T_REMOV, 116 "TANDBERG", " TDC 3600 ", ""}, {0, 12, { 117 {0, 0, 0}, /* minor 0-3 */ 118 {ST_Q_FORCE_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 119 {0, 0, QIC_150}, /* minor 8-11 */ 120 {0, 0, QIC_120} /* minor 12-15 */ 121 }}}, 122 {{T_SEQUENTIAL, T_REMOV, 123 "TANDBERG", " TDC 3800 ", ""}, {0, 0, { 124 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 125 {0, 0, QIC_525}, /* minor 4-7 */ 126 {0, 0, QIC_150}, /* minor 8-11 */ 127 {0, 0, QIC_120} /* minor 12-15 */ 128 }}}, 129 /* 130 * lacking a manual for the 4200, it's not clear what the 131 * specific density codes should be- the device is a 2.5GB 132 * capable QIC drive, those density codes aren't readily 133 * availabel. The 'default' will just have to do. 134 */ 135 {{T_SEQUENTIAL, T_REMOV, 136 "TANDBERG", " TDC 4200 ", ""}, {0, 0, { 137 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 138 {0, 0, QIC_525}, /* minor 4-7 */ 139 {0, 0, QIC_150}, /* minor 8-11 */ 140 {0, 0, QIC_120} /* minor 12-15 */ 141 }}}, 142 /* 143 * At least -005 and -007 need this. I'll assume they all do unless I 144 * hear otherwise. - mycroft, 31MAR1994 145 */ 146 {{T_SEQUENTIAL, T_REMOV, 147 "ARCHIVE ", "VIPER 2525 25462", ""}, {0, 0, { 148 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 149 {ST_Q_SENSE_HELP, 0, QIC_525}, /* minor 4-7 */ 150 {0, 0, QIC_150}, /* minor 8-11 */ 151 {0, 0, QIC_120} /* minor 12-15 */ 152 }}}, 153 /* 154 * One user reports that this works for his tape drive. It probably 155 * needs more work. - mycroft, 09APR1994 156 */ 157 {{T_SEQUENTIAL, T_REMOV, 158 "SANKYO ", "CP525 ", ""}, {0, 0, { 159 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 160 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 161 {0, 0, QIC_150}, /* minor 8-11 */ 162 {0, 0, QIC_120} /* minor 12-15 */ 163 }}}, 164 {{T_SEQUENTIAL, T_REMOV, 165 "ANRITSU ", "DMT780 ", ""}, {0, 0, { 166 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 167 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 168 {0, 0, QIC_150}, /* minor 8-11 */ 169 {0, 0, QIC_120} /* minor 12-15 */ 170 }}}, 171 {{T_SEQUENTIAL, T_REMOV, 172 "ARCHIVE ", "VIPER 150 21247", ""}, {ST_Q_ERASE_NOIMM, 12, { 173 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 174 {0, 0, QIC_150}, /* minor 4-7 */ 175 {0, 0, QIC_120}, /* minor 8-11 */ 176 {0, 0, QIC_24} /* minor 12-15 */ 177 }}}, 178 {{T_SEQUENTIAL, T_REMOV, 179 "ARCHIVE ", "VIPER 150 21531", ""}, {ST_Q_ERASE_NOIMM, 12, { 180 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 181 {0, 0, QIC_150}, /* minor 4-7 */ 182 {0, 0, QIC_120}, /* minor 8-11 */ 183 {0, 0, QIC_24} /* minor 12-15 */ 184 }}}, 185 {{T_SEQUENTIAL, T_REMOV, 186 "WANGTEK ", "5099ES SCSI", ""}, {0, 0, { 187 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 188 {0, 0, QIC_11}, /* minor 4-7 */ 189 {0, 0, QIC_24}, /* minor 8-11 */ 190 {0, 0, QIC_24} /* minor 12-15 */ 191 }}}, 192 {{T_SEQUENTIAL, T_REMOV, 193 "WANGTEK ", "5150ES SCSI", ""}, {0, 0, { 194 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 195 {0, 0, QIC_24}, /* minor 4-7 */ 196 {0, 0, QIC_120}, /* minor 8-11 */ 197 {0, 0, QIC_150} /* minor 12-15 */ 198 }}}, 199 {{T_SEQUENTIAL, T_REMOV, 200 "WANGTEK ", "5525ES SCSI REV7", ""}, {0, 0, { 201 {0, 0, 0}, /* minor 0-3 */ 202 {ST_Q_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 203 {0, 0, QIC_150}, /* minor 8-11 */ 204 {0, 0, QIC_120} /* minor 12-15 */ 205 }}}, 206 {{T_SEQUENTIAL, T_REMOV, 207 "WangDAT ", "Model 1300 ", ""}, {0, 0, { 208 {0, 0, 0}, /* minor 0-3 */ 209 {ST_Q_FORCE_BLKSIZE, 512, DDS}, /* minor 4-7 */ 210 {ST_Q_FORCE_BLKSIZE, 1024, DDS}, /* minor 8-11 */ 211 {ST_Q_FORCE_BLKSIZE, 0, DDS} /* minor 12-15 */ 212 }}}, 213 {{T_SEQUENTIAL, T_REMOV, 214 "EXABYTE ", "EXB-8200 ", "263H"}, {0, 5, { 215 {0, 0, 0}, /* minor 0-3 */ 216 {0, 0, 0}, /* minor 4-7 */ 217 {0, 0, 0}, /* minor 8-11 */ 218 {0, 0, 0} /* minor 12-15 */ 219 }}}, 220 {{T_SEQUENTIAL, T_REMOV, 221 "STK", "9490", ""}, 222 {ST_Q_FORCE_BLKSIZE, 0, { 223 {0, 0, 0}, /* minor 0-3 */ 224 {0, 0, 0}, /* minor 4-7 */ 225 {0, 0, 0}, /* minor 8-11 */ 226 {0, 0, 0} /* minor 12-15 */ 227 }}}, 228 {{T_SEQUENTIAL, T_REMOV, 229 "STK", "SD-3", ""}, 230 {ST_Q_FORCE_BLKSIZE, 0, { 231 {0, 0, 0}, /* minor 0-3 */ 232 {0, 0, 0}, /* minor 4-7 */ 233 {0, 0, 0}, /* minor 8-11 */ 234 {0, 0, 0} /* minor 12-15 */ 235 }}}, 236 {{T_SEQUENTIAL, T_REMOV, 237 "IBM", "03590", ""}, {ST_Q_IGNORE_LOADS, 0, { 238 {0, 0, 0}, /* minor 0-3 */ 239 {0, 0, 0}, /* minor 4-7 */ 240 {0, 0, 0}, /* minor 8-11 */ 241 {0, 0, 0} /* minor 12-15 */ 242 }}}, 243 {{T_SEQUENTIAL, T_REMOV, 244 "HP ", "T4000s ", ""}, {ST_Q_UNIMODAL, 0, { 245 {0, 0, QIC_3095}, /* minor 0-3 */ 246 {0, 0, QIC_3095}, /* minor 4-7 */ 247 {0, 0, QIC_3095}, /* minor 8-11 */ 248 {0, 0, QIC_3095}, /* minor 12-15 */ 249 }}}, 250 #if 0 251 {{T_SEQUENTIAL, T_REMOV, 252 "EXABYTE ", "EXB-8200 ", ""}, {0, 12, { 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 #endif 259 {{T_SEQUENTIAL, T_REMOV, 260 "TEAC ", "MT-2ST/N50 ", ""}, {ST_Q_IGNORE_LOADS, 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 "OnStream", "ADR50 Drive", ""}, {ST_Q_UNIMODAL, 0, { 268 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 269 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 4-7 */ 270 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 8-11 */ 271 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 12-15 */ 272 }}}, 273 {{T_SEQUENTIAL, T_REMOV, 274 "OnStream DI-30", "", "1.0"}, {ST_Q_NOFILEMARKS, 0, { 275 {0, 0, 0}, /* minor 0-3 */ 276 {0, 0, 0}, /* minor 4-7 */ 277 {0, 0, 0}, /* minor 8-11 */ 278 {0, 0, 0} /* minor 12-15 */ 279 }}}, 280 {{T_SEQUENTIAL, T_REMOV, 281 "NCR H621", "0-STD-03-46F880 ", ""}, {ST_Q_NOPREVENT, 0, { 282 {0, 0, 0}, /* minor 0-3 */ 283 {0, 0, 0}, /* minor 4-7 */ 284 {0, 0, 0}, /* minor 8-11 */ 285 {0, 0, 0} /* minor 12-15 */ 286 }}}, 287 }; 288 289 #define NOEJECT 0 290 #define EJECT 1 291 292 void st_identify_drive __P((struct st_softc *, 293 struct scsipi_inquiry_pattern *)); 294 void st_loadquirks __P((struct st_softc *)); 295 int st_mount_tape __P((dev_t, int)); 296 void st_unmount __P((struct st_softc *, boolean)); 297 int st_decide_mode __P((struct st_softc *, boolean)); 298 void ststart __P((struct scsipi_periph *)); 299 void stdone __P((struct scsipi_xfer *)); 300 int st_read __P((struct st_softc *, char *, int, int)); 301 int st_space __P((struct st_softc *, int, u_int, int)); 302 int st_write_filemarks __P((struct st_softc *, int, int)); 303 int st_check_eod __P((struct st_softc *, boolean, int *, int)); 304 int st_load __P((struct st_softc *, u_int, int)); 305 int st_rewind __P((struct st_softc *, u_int, int)); 306 int st_interpret_sense __P((struct scsipi_xfer *)); 307 int st_touch_tape __P((struct st_softc *)); 308 int st_erase __P((struct st_softc *, int full, int flags)); 309 int st_rdpos __P((struct st_softc *, int, u_int32_t *)); 310 int st_setpos __P((struct st_softc *, int, u_int32_t *)); 311 312 const struct scsipi_periphsw st_switch = { 313 st_interpret_sense, 314 ststart, 315 NULL, 316 stdone 317 }; 318 319 #if defined(ST_ENABLE_EARLYWARN) 320 #define ST_INIT_FLAGS ST_EARLYWARN 321 #else 322 #define ST_INIT_FLAGS 0 323 #endif 324 325 /* 326 * The routine called by the low level scsi routine when it discovers 327 * A device suitable for this driver 328 */ 329 void 330 stattach(parent, st, aux) 331 struct device *parent; 332 struct st_softc *st; 333 void *aux; 334 { 335 struct scsipibus_attach_args *sa = aux; 336 struct scsipi_periph *periph = sa->sa_periph; 337 338 SC_DEBUG(periph, SCSIPI_DB2, ("stattach: ")); 339 340 /* 341 * Store information needed to contact our base driver 342 */ 343 st->sc_periph = periph; 344 periph->periph_dev = &st->sc_dev; 345 periph->periph_switch = &st_switch; 346 347 /* 348 * Set initial flags 349 */ 350 351 st->flags = ST_INIT_FLAGS; 352 353 /* 354 * Check if the drive is a known criminal and take 355 * Any steps needed to bring it into line 356 */ 357 st_identify_drive(st, &sa->sa_inqbuf); 358 /* 359 * Use the subdriver to request information regarding the drive. 360 */ 361 printf("\n"); 362 printf("%s: %s", st->sc_dev.dv_xname, st->quirkdata ? "rogue, " : ""); 363 if (scsipi_test_unit_ready(periph, 364 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE) || 365 st->ops(st, ST_OPS_MODESENSE, 366 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE)) 367 printf("drive empty\n"); 368 else { 369 printf("density code %d, ", st->media_density); 370 if (st->media_blksize > 0) 371 printf("%d-byte", st->media_blksize); 372 else 373 printf("variable"); 374 printf(" blocks, write-%s\n", 375 (st->flags & ST_READONLY) ? "protected" : "enabled"); 376 } 377 378 /* 379 * Set up the buf queue for this device 380 */ 381 BUFQ_INIT(&st->buf_queue); 382 383 #if NRND > 0 384 rnd_attach_source(&st->rnd_source, st->sc_dev.dv_xname, 385 RND_TYPE_TAPE, 0); 386 #endif 387 } 388 389 int 390 stactivate(self, act) 391 struct device *self; 392 enum devact act; 393 { 394 int rv = 0; 395 396 switch (act) { 397 case DVACT_ACTIVATE: 398 rv = EOPNOTSUPP; 399 break; 400 401 case DVACT_DEACTIVATE: 402 /* 403 * Nothing to do; we key off the device's DVF_ACTIVE. 404 */ 405 break; 406 } 407 return (rv); 408 } 409 410 int 411 stdetach(self, flags) 412 struct device *self; 413 int flags; 414 { 415 struct st_softc *st = (struct st_softc *)self; 416 struct buf *bp; 417 int s, bmaj, cmaj, mn; 418 419 /* locate the major number */ 420 for (bmaj = 0; bmaj <= nblkdev; bmaj++) 421 if (bdevsw[bmaj].d_open == stopen) 422 break; 423 for (cmaj = 0; cmaj <= nchrdev; cmaj++) 424 if (cdevsw[cmaj].d_open == stopen) 425 break; 426 427 s = splbio(); 428 429 /* Kill off any queued buffers. */ 430 while ((bp = BUFQ_FIRST(&st->buf_queue)) != NULL) { 431 BUFQ_REMOVE(&st->buf_queue, bp); 432 bp->b_error = EIO; 433 bp->b_flags |= B_ERROR; 434 bp->b_resid = bp->b_bcount; 435 biodone(bp); 436 } 437 438 /* Kill off any pending commands. */ 439 scsipi_kill_pending(st->sc_periph); 440 441 splx(s); 442 443 /* Nuke the vnodes for any open instances */ 444 mn = STUNIT(self->dv_unit); 445 vdevgone(bmaj, mn, mn+STNMINOR-1, VBLK); 446 vdevgone(cmaj, mn, mn+STNMINOR-1, VCHR); 447 448 449 #if NRND > 0 450 /* Unhook the entropy source. */ 451 rnd_detach_source(&st->rnd_source); 452 #endif 453 454 return (0); 455 } 456 457 /* 458 * Use the inquiry routine in 'scsi_base' to get drive info so we can 459 * Further tailor our behaviour. 460 */ 461 void 462 st_identify_drive(st, inqbuf) 463 struct st_softc *st; 464 struct scsipi_inquiry_pattern *inqbuf; 465 { 466 struct st_quirk_inquiry_pattern *finger; 467 int priority; 468 469 finger = (struct st_quirk_inquiry_pattern *)scsipi_inqmatch(inqbuf, 470 (caddr_t)st_quirk_patterns, 471 sizeof(st_quirk_patterns) / sizeof(st_quirk_patterns[0]), 472 sizeof(st_quirk_patterns[0]), &priority); 473 if (priority != 0) { 474 st->quirkdata = &finger->quirkdata; 475 st->drive_quirks = finger->quirkdata.quirks; 476 st->quirks = finger->quirkdata.quirks; /* start value */ 477 st->page_0_size = finger->quirkdata.page_0_size; 478 st_loadquirks(st); 479 } 480 } 481 482 /* 483 * initialise the subdevices to the default (QUIRK) state. 484 * this will remove any setting made by the system operator or previous 485 * operations. 486 */ 487 void 488 st_loadquirks(st) 489 struct st_softc *st; 490 { 491 int i; 492 struct modes *mode; 493 struct modes *mode2; 494 495 mode = st->quirkdata->modes; 496 mode2 = st->modes; 497 for (i = 0; i < 4; i++) { 498 memset(mode2, 0, sizeof(struct modes)); 499 st->modeflags[i] &= ~(BLKSIZE_SET_BY_QUIRK | 500 DENSITY_SET_BY_QUIRK | BLKSIZE_SET_BY_USER | 501 DENSITY_SET_BY_USER); 502 if ((mode->quirks | st->drive_quirks) & ST_Q_FORCE_BLKSIZE) { 503 mode2->blksize = mode->blksize; 504 st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; 505 } 506 if (mode->density) { 507 mode2->density = mode->density; 508 st->modeflags[i] |= DENSITY_SET_BY_QUIRK; 509 } 510 mode2->quirks |= mode->quirks; 511 mode++; 512 mode2++; 513 } 514 } 515 516 /* 517 * open the device. 518 */ 519 int 520 stopen(dev, flags, mode, p) 521 dev_t dev; 522 int flags; 523 int mode; 524 struct proc *p; 525 { 526 u_int stmode, dsty; 527 int error, sflags, unit, tries, ntries; 528 struct st_softc *st; 529 struct scsipi_periph *periph; 530 struct scsipi_adapter *adapt; 531 532 unit = STUNIT(dev); 533 if (unit >= st_cd.cd_ndevs) 534 return (ENXIO); 535 st = st_cd.cd_devs[unit]; 536 if (st == NULL) 537 return (ENXIO); 538 539 stmode = STMODE(dev); 540 dsty = STDSTY(dev); 541 542 periph = st->sc_periph; 543 adapt = periph->periph_channel->chan_adapter; 544 545 SC_DEBUG(periph, SCSIPI_DB1, ("open: dev=0x%x (unit %d (of %d))\n", dev, 546 unit, st_cd.cd_ndevs)); 547 548 549 /* 550 * Only allow one at a time 551 */ 552 if (periph->periph_flags & PERIPH_OPEN) { 553 printf("%s: already open\n", st->sc_dev.dv_xname); 554 return (EBUSY); 555 } 556 557 if ((error = scsipi_adapter_addref(adapt)) != 0) 558 return (error); 559 560 /* 561 * clear any latched errors. 562 */ 563 st->mt_resid = 0; 564 st->mt_erreg = 0; 565 st->asc = 0; 566 st->ascq = 0; 567 568 /* 569 * Catch any unit attention errors. Be silent about this 570 * unless we're already mounted. We ignore media change 571 * if we're in control mode or not mounted yet. 572 */ 573 if ((st->flags & ST_MOUNTED) == 0 || stmode == CTRL_MODE) { 574 #ifdef SCSIDEBUG 575 sflags = XS_CTL_IGNORE_MEDIA_CHANGE; 576 #else 577 sflags = XS_CTL_SILENT|XS_CTL_IGNORE_MEDIA_CHANGE; 578 #endif 579 } else 580 sflags = 0; 581 582 /* 583 * If we're already mounted or we aren't configured for 584 * a mount delay, only try a test unit ready once. Otherwise, 585 * try up to ST_MOUNT_DELAY times with a rest interval of 586 * one second between each try. 587 */ 588 589 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0) { 590 ntries = 1; 591 } else { 592 ntries = ST_MOUNT_DELAY; 593 } 594 595 for (error = tries = 0; tries < ntries; tries++) { 596 int slpintr, oflags; 597 598 /* 599 * If we had no error, or we're opening the control mode 600 * device, we jump out right away. 601 */ 602 603 error = scsipi_test_unit_ready(periph, sflags); 604 if (error == 0 || stmode == CTRL_MODE) { 605 break; 606 } 607 608 /* 609 * We had an error. 610 * 611 * If we're already mounted or we aren't configured for 612 * a mount delay, or the error isn't a NOT READY error, 613 * skip to the error exit now. 614 */ 615 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0 || 616 (st->mt_key != SKEY_NOT_READY)) { 617 goto bad; 618 } 619 620 /* 621 * clear any latched errors. 622 */ 623 st->mt_resid = 0; 624 st->mt_erreg = 0; 625 st->asc = 0; 626 st->ascq = 0; 627 628 /* 629 * Fake that we have the device open so 630 * we block other apps from getting in. 631 */ 632 633 oflags = periph->periph_flags; 634 periph->periph_flags |= PERIPH_OPEN; 635 636 slpintr = tsleep(&lbolt, PUSER|PCATCH, "stload", 0); 637 638 periph->periph_flags = oflags; /* restore flags */ 639 if (slpintr) { 640 goto bad; 641 } 642 } 643 644 645 /* 646 * If the mode is 3 (e.g. minor = 3,7,11,15) then the device has 647 * been opened to set defaults and perform other, usually non-I/O 648 * related, operations. In this case, do a quick check to see 649 * whether the unit actually had a tape loaded (this will be known 650 * as to whether or not we got a NOT READY for the above 651 * unit attention). If a tape is there, go do a mount sequence. 652 */ 653 if (stmode == CTRL_MODE && st->mt_key == SKEY_NOT_READY) { 654 periph->periph_flags |= PERIPH_OPEN; 655 return (0); 656 } 657 658 /* 659 * If we get this far and had an error set, that means we failed 660 * to pass the 'test unit ready' test for the non-controlmode device, 661 * so we bounce the open. 662 */ 663 664 if (error) 665 return (error); 666 667 /* 668 * Else, we're now committed to saying we're open. 669 */ 670 671 periph->periph_flags |= PERIPH_OPEN; /* unit attn are now errors */ 672 673 /* 674 * If it's a different mode, or if the media has been 675 * invalidated, unmount the tape from the previous 676 * session but continue with open processing 677 */ 678 if (st->last_dsty != dsty || 679 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 680 st_unmount(st, NOEJECT); 681 682 /* 683 * If we are not mounted, then we should start a new 684 * mount session. 685 */ 686 if (!(st->flags & ST_MOUNTED)) { 687 if ((error = st_mount_tape(dev, flags)) != 0) 688 goto bad; 689 st->last_dsty = dsty; 690 } 691 if (!(st->quirks & ST_Q_NOPREVENT)) { 692 scsipi_prevent(periph, PR_PREVENT, 693 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 694 } 695 696 SC_DEBUG(periph, SCSIPI_DB2, ("open complete\n")); 697 return (0); 698 699 bad: 700 st_unmount(st, NOEJECT); 701 scsipi_adapter_delref(adapt); 702 periph->periph_flags &= ~PERIPH_OPEN; 703 return (error); 704 } 705 706 /* 707 * close the device.. only called if we are the LAST 708 * occurence of an open device 709 */ 710 int 711 stclose(dev, flags, mode, p) 712 dev_t dev; 713 int flags; 714 int mode; 715 struct proc *p; 716 { 717 int stxx, error = 0; 718 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 719 struct scsipi_periph *periph = st->sc_periph; 720 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 721 722 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("closing\n")); 723 724 /* 725 * Make sure that a tape opened in write-only mode will have 726 * file marks written on it when closed, even if not written to. 727 * 728 * This is for SUN compatibility. Actually, the Sun way of 729 * things is to: 730 * 731 * only write filemarks if there are fmks to be written and 732 * - open for write (possibly read/write) 733 * - the last operation was a write 734 * or: 735 * - opened for wronly 736 * - no data was written (including filemarks) 737 */ 738 739 stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); 740 if (((flags & FWRITE) && stxx == ST_WRITTEN) || 741 ((flags & O_ACCMODE) == FWRITE && stxx == 0)) { 742 int nm; 743 error = st_check_eod(st, FALSE, &nm, 0); 744 } 745 746 /* 747 * Allow robots to eject tape if needed. 748 */ 749 scsipi_prevent(periph, PR_ALLOW, 750 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 751 752 switch (STMODE(dev)) { 753 case NORMAL_MODE: 754 st_unmount(st, NOEJECT); 755 break; 756 case NOREW_MODE: 757 case CTRL_MODE: 758 /* 759 * Leave mounted unless media seems to have been removed. 760 * 761 * Otherwise, if we're to terminate a tape with more than one 762 * filemark [ and because we're not rewinding here ], backspace 763 * one filemark so that later appends will see an unbroken 764 * sequence of: 765 * 766 * file - FMK - file - FMK ... file - FMK FMK (EOM) 767 */ 768 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 769 st_unmount(st, NOEJECT); 770 } else if (error == 0) { 771 /* 772 * ST_WRITTEN was preserved from above. 773 * 774 * All we need to know here is: 775 * 776 * Were we writing this tape and was the last 777 * operation a write? 778 * 779 * Are there supposed to be 2FM at EOD? 780 * 781 * If both statements are true, then we backspace 782 * one filemark. 783 */ 784 stxx |= (st->flags & ST_2FM_AT_EOD); 785 if ((flags & FWRITE) != 0 && 786 (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { 787 error = st_space(st, -1, SP_FILEMARKS, 0); 788 } 789 } 790 break; 791 case EJECT_MODE: 792 st_unmount(st, EJECT); 793 break; 794 } 795 796 scsipi_wait_drain(periph); 797 798 scsipi_adapter_delref(adapt); 799 periph->periph_flags &= ~PERIPH_OPEN; 800 801 return (error); 802 } 803 804 /* 805 * Start a new mount session. 806 * Copy in all the default parameters from the selected device mode. 807 * and try guess any that seem to be defaulted. 808 */ 809 int 810 st_mount_tape(dev, flags) 811 dev_t dev; 812 int flags; 813 { 814 int unit; 815 u_int dsty; 816 struct st_softc *st; 817 struct scsipi_periph *periph; 818 int error = 0; 819 820 unit = STUNIT(dev); 821 dsty = STDSTY(dev); 822 st = st_cd.cd_devs[unit]; 823 periph = st->sc_periph; 824 825 if (st->flags & ST_MOUNTED) 826 return (0); 827 828 SC_DEBUG(periph, SCSIPI_DB1, ("mounting\n ")); 829 st->flags |= ST_NEW_MOUNT; 830 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 831 /* 832 * If the media is new, then make sure we give it a chance to 833 * to do a 'load' instruction. (We assume it is new.) 834 */ 835 if ((error = st_load(st, LD_LOAD, XS_CTL_SILENT)) != 0) 836 return (error); 837 /* 838 * Throw another dummy instruction to catch 839 * 'Unit attention' errors. Many drives give 840 * these after doing a Load instruction (with 841 * the MEDIUM MAY HAVE CHANGED asc/ascq). 842 */ 843 scsipi_test_unit_ready(periph, XS_CTL_SILENT); /* XXX */ 844 845 /* 846 * Some devices can't tell you much until they have been 847 * asked to look at the media. This quirk does this. 848 */ 849 if (st->quirks & ST_Q_SENSE_HELP) 850 if ((error = st_touch_tape(st)) != 0) 851 return (error); 852 /* 853 * Load the physical device parameters 854 * loads: blkmin, blkmax 855 */ 856 if ((error = st->ops(st, ST_OPS_RBL, 0)) != 0) 857 return (error); 858 /* 859 * Load the media dependent parameters 860 * includes: media_blksize,media_density,numblks 861 * As we have a tape in, it should be reflected here. 862 * If not you may need the "quirk" above. 863 */ 864 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 865 return (error); 866 /* 867 * If we have gained a permanent density from somewhere, 868 * then use it in preference to the one supplied by 869 * default by the driver. 870 */ 871 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 872 st->density = st->modes[dsty].density; 873 else 874 st->density = st->media_density; 875 /* 876 * If we have gained a permanent blocksize 877 * then use it in preference to the one supplied by 878 * default by the driver. 879 */ 880 st->flags &= ~ST_FIXEDBLOCKS; 881 if (st->modeflags[dsty] & 882 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 883 st->blksize = st->modes[dsty].blksize; 884 if (st->blksize) 885 st->flags |= ST_FIXEDBLOCKS; 886 } else { 887 if ((error = st_decide_mode(st, FALSE)) != 0) 888 return (error); 889 } 890 if ((error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 891 /* ATAPI will return ENODEV for this, and this may be OK */ 892 if (error != ENODEV) { 893 printf("%s: cannot set selected mode\n", 894 st->sc_dev.dv_xname); 895 return (error); 896 } 897 } 898 st->flags &= ~ST_NEW_MOUNT; 899 st->flags |= ST_MOUNTED; 900 periph->periph_flags |= PERIPH_MEDIA_LOADED; /* move earlier? */ 901 st->blkno = st->fileno = (daddr_t) 0; 902 return (0); 903 } 904 905 /* 906 * End the present mount session. 907 * Rewind, and optionally eject the tape. 908 * Reset various flags to indicate that all new 909 * operations require another mount operation 910 */ 911 void 912 st_unmount(st, eject) 913 struct st_softc *st; 914 boolean eject; 915 { 916 struct scsipi_periph *periph = st->sc_periph; 917 int nmarks; 918 919 if ((st->flags & ST_MOUNTED) == 0) 920 return; 921 SC_DEBUG(periph, SCSIPI_DB1, ("unmounting\n")); 922 st_check_eod(st, FALSE, &nmarks, XS_CTL_IGNORE_NOT_READY); 923 st_rewind(st, 0, XS_CTL_IGNORE_NOT_READY); 924 925 /* 926 * Section 9.3.3 of the SCSI specs states that a device shall return 927 * the density value specified in the last succesfull MODE SELECT 928 * after an unload operation, in case it is not able to 929 * automatically determine the density of the new medium. 930 * 931 * So we instruct the device to use the default density, which will 932 * prevent the use of stale density values (in particular, 933 * in st_touch_tape(). 934 */ 935 st->density = 0; 936 if (st->ops(st, ST_OPS_MODESELECT, 0) != 0) { 937 printf("%s: WARNING: cannot revert to default density\n", 938 st->sc_dev.dv_xname); 939 } 940 941 if (eject) { 942 if (!(st->quirks & ST_Q_NOPREVENT)) { 943 scsipi_prevent(periph, PR_ALLOW, 944 XS_CTL_IGNORE_ILLEGAL_REQUEST | 945 XS_CTL_IGNORE_NOT_READY); 946 } 947 st_load(st, LD_UNLOAD, XS_CTL_IGNORE_NOT_READY); 948 st->blkno = st->fileno = (daddr_t) -1; 949 } else { 950 st->blkno = st->fileno = (daddr_t) 0; 951 } 952 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 953 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 954 } 955 956 /* 957 * Given all we know about the device, media, mode, 'quirks' and 958 * initial operation, make a decision as to how we should be set 959 * to run (regarding blocking and EOD marks) 960 */ 961 int 962 st_decide_mode(st, first_read) 963 struct st_softc *st; 964 boolean first_read; 965 { 966 967 SC_DEBUG(st->sc_periph, SCSIPI_DB2, ("starting block mode decision\n")); 968 969 /* 970 * If the drive can only handle fixed-length blocks and only at 971 * one size, perhaps we should just do that. 972 */ 973 if (st->blkmin && (st->blkmin == st->blkmax)) { 974 st->flags |= ST_FIXEDBLOCKS; 975 st->blksize = st->blkmin; 976 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 977 ("blkmin == blkmax of %d\n", st->blkmin)); 978 goto done; 979 } 980 /* 981 * If the tape density mandates (or even suggests) use of fixed 982 * or variable-length blocks, comply. 983 */ 984 switch (st->density) { 985 case HALFINCH_800: 986 case HALFINCH_1600: 987 case HALFINCH_6250: 988 case DDS: 989 st->flags &= ~ST_FIXEDBLOCKS; 990 st->blksize = 0; 991 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 992 ("density specified variable\n")); 993 goto done; 994 case QIC_11: 995 case QIC_24: 996 case QIC_120: 997 case QIC_150: 998 case QIC_525: 999 case QIC_1320: 1000 case QIC_3095: 1001 case QIC_3220: 1002 st->flags |= ST_FIXEDBLOCKS; 1003 if (st->media_blksize > 0) 1004 st->blksize = st->media_blksize; 1005 else 1006 st->blksize = DEF_FIXED_BSIZE; 1007 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1008 ("density specified fixed\n")); 1009 goto done; 1010 } 1011 /* 1012 * If we're about to read the tape, perhaps we should choose 1013 * fixed or variable-length blocks and block size according to 1014 * what the drive found on the tape. 1015 */ 1016 if (first_read && 1017 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 1018 (st->media_blksize == DEF_FIXED_BSIZE) || 1019 (st->media_blksize == 1024))) { 1020 if (st->media_blksize > 0) 1021 st->flags |= ST_FIXEDBLOCKS; 1022 else 1023 st->flags &= ~ST_FIXEDBLOCKS; 1024 st->blksize = st->media_blksize; 1025 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1026 ("Used media_blksize of %d\n", st->media_blksize)); 1027 goto done; 1028 } 1029 /* 1030 * We're getting no hints from any direction. Choose variable- 1031 * length blocks arbitrarily. 1032 */ 1033 st->flags &= ~ST_FIXEDBLOCKS; 1034 st->blksize = 0; 1035 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1036 ("Give up and default to variable mode\n")); 1037 1038 done: 1039 /* 1040 * Decide whether or not to write two file marks to signify end- 1041 * of-data. Make the decision as a function of density. If 1042 * the decision is not to use a second file mark, the SCSI BLANK 1043 * CHECK condition code will be recognized as end-of-data when 1044 * first read. 1045 * (I think this should be a by-product of fixed/variable..julian) 1046 */ 1047 switch (st->density) { 1048 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 1049 case QIC_11: 1050 case QIC_24: 1051 case QIC_120: 1052 case QIC_150: 1053 case QIC_525: 1054 case QIC_1320: 1055 case QIC_3095: 1056 case QIC_3220: 1057 st->flags &= ~ST_2FM_AT_EOD; 1058 break; 1059 default: 1060 st->flags |= ST_2FM_AT_EOD; 1061 } 1062 return (0); 1063 } 1064 1065 /* 1066 * Actually translate the requested transfer into 1067 * one the physical driver can understand 1068 * The transfer is described by a buf and will include 1069 * only one physical transfer. 1070 */ 1071 void 1072 ststrategy(bp) 1073 struct buf *bp; 1074 { 1075 struct st_softc *st = st_cd.cd_devs[STUNIT(bp->b_dev)]; 1076 int s; 1077 1078 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1079 ("ststrategy %ld bytes @ blk %d\n", bp->b_bcount, bp->b_blkno)); 1080 /* 1081 * If it's a null transfer, return immediatly 1082 */ 1083 if (bp->b_bcount == 0) 1084 goto done; 1085 1086 /* If offset is negative, error */ 1087 if (bp->b_blkno < 0) { 1088 bp->b_error = EINVAL; 1089 goto bad; 1090 } 1091 1092 /* 1093 * Odd sized request on fixed drives are verboten 1094 */ 1095 if (st->flags & ST_FIXEDBLOCKS) { 1096 if (bp->b_bcount % st->blksize) { 1097 printf("%s: bad request, must be multiple of %d\n", 1098 st->sc_dev.dv_xname, st->blksize); 1099 bp->b_error = EIO; 1100 goto bad; 1101 } 1102 } 1103 /* 1104 * as are out-of-range requests on variable drives. 1105 */ 1106 else if (bp->b_bcount < st->blkmin || 1107 (st->blkmax && bp->b_bcount > st->blkmax)) { 1108 printf("%s: bad request, must be between %d and %d\n", 1109 st->sc_dev.dv_xname, st->blkmin, st->blkmax); 1110 bp->b_error = EIO; 1111 goto bad; 1112 } 1113 s = splbio(); 1114 1115 /* 1116 * Place it in the queue of activities for this tape 1117 * at the end (a bit silly because we only have on user.. 1118 * (but it could fork())) 1119 */ 1120 BUFQ_INSERT_TAIL(&st->buf_queue, bp); 1121 1122 /* 1123 * Tell the device to get going on the transfer if it's 1124 * not doing anything, otherwise just wait for completion 1125 * (All a bit silly if we're only allowing 1 open but..) 1126 */ 1127 ststart(st->sc_periph); 1128 1129 splx(s); 1130 return; 1131 bad: 1132 bp->b_flags |= B_ERROR; 1133 done: 1134 /* 1135 * Correctly set the buf to indicate a completed xfer 1136 */ 1137 bp->b_resid = bp->b_bcount; 1138 biodone(bp); 1139 return; 1140 } 1141 1142 /* 1143 * ststart looks to see if there is a buf waiting for the device 1144 * and that the device is not already busy. If both are true, 1145 * It dequeues the buf and creates a scsi command to perform the 1146 * transfer required. The transfer request will call scsipi_done 1147 * on completion, which will in turn call this routine again 1148 * so that the next queued transfer is performed. 1149 * The bufs are queued by the strategy routine (ststrategy) 1150 * 1151 * This routine is also called after other non-queued requests 1152 * have been made of the scsi driver, to ensure that the queue 1153 * continues to be drained. 1154 * ststart() is called at splbio 1155 */ 1156 void 1157 ststart(periph) 1158 struct scsipi_periph *periph; 1159 { 1160 struct st_softc *st = (void *)periph->periph_dev; 1161 struct buf *bp; 1162 struct scsi_rw_tape cmd; 1163 int flags, error; 1164 1165 SC_DEBUG(periph, SCSIPI_DB2, ("ststart ")); 1166 /* 1167 * See if there is a buf to do and we are not already 1168 * doing one 1169 */ 1170 while (periph->periph_active < periph->periph_openings) { 1171 /* if a special awaits, let it proceed first */ 1172 if (periph->periph_flags & PERIPH_WAITING) { 1173 periph->periph_flags &= ~PERIPH_WAITING; 1174 wakeup((caddr_t)periph); 1175 return; 1176 } 1177 1178 if ((bp = BUFQ_FIRST(&st->buf_queue)) == NULL) 1179 return; 1180 BUFQ_REMOVE(&st->buf_queue, bp); 1181 1182 /* 1183 * If the device has been unmounted by the user 1184 * then throw away all requests until done. 1185 */ 1186 if ((st->flags & ST_MOUNTED) == 0 || 1187 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 1188 /* make sure that one implies the other.. */ 1189 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 1190 bp->b_flags |= B_ERROR; 1191 bp->b_error = EIO; 1192 bp->b_resid = bp->b_bcount; 1193 biodone(bp); 1194 continue; 1195 } 1196 /* 1197 * only FIXEDBLOCK devices have pending I/O or space operations. 1198 */ 1199 if (st->flags & ST_FIXEDBLOCKS) { 1200 /* 1201 * If we are at a filemark but have not reported it yet 1202 * then we should report it now 1203 */ 1204 if (st->flags & ST_AT_FILEMARK) { 1205 if ((bp->b_flags & B_READ) == B_WRITE) { 1206 /* 1207 * Handling of ST_AT_FILEMARK in 1208 * st_space will fill in the right file 1209 * mark count. 1210 * Back up over filemark 1211 */ 1212 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1213 bp->b_flags |= B_ERROR; 1214 bp->b_error = EIO; 1215 biodone(bp); 1216 continue; 1217 } 1218 } else { 1219 bp->b_resid = bp->b_bcount; 1220 bp->b_error = 0; 1221 bp->b_flags &= ~B_ERROR; 1222 st->flags &= ~ST_AT_FILEMARK; 1223 biodone(bp); 1224 continue; /* seek more work */ 1225 } 1226 } 1227 } 1228 /* 1229 * If we are at EOM but have not reported it 1230 * yet then we should report it now. 1231 */ 1232 if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { 1233 bp->b_resid = bp->b_bcount; 1234 if (st->flags & ST_EIO_PENDING) { 1235 bp->b_error = EIO; 1236 bp->b_flags |= B_ERROR; 1237 } 1238 st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); 1239 biodone(bp); 1240 continue; /* seek more work */ 1241 } 1242 1243 /* 1244 * Fill out the scsi command 1245 */ 1246 memset(&cmd, 0, sizeof(cmd)); 1247 flags = XS_CTL_NOSLEEP | XS_CTL_ASYNC; 1248 if ((bp->b_flags & B_READ) == B_WRITE) { 1249 cmd.opcode = WRITE; 1250 st->flags &= ~ST_FM_WRITTEN; 1251 flags |= XS_CTL_DATA_OUT; 1252 } else { 1253 cmd.opcode = READ; 1254 flags |= XS_CTL_DATA_IN; 1255 } 1256 1257 /* 1258 * Handle "fixed-block-mode" tape drives by using the 1259 * block count instead of the length. 1260 */ 1261 if (st->flags & ST_FIXEDBLOCKS) { 1262 cmd.byte2 |= SRW_FIXED; 1263 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1264 } else 1265 _lto3b(bp->b_bcount, cmd.len); 1266 1267 /* 1268 * Clear 'position updated' indicator 1269 */ 1270 st->flags &= ~ST_POSUPDATED; 1271 1272 /* 1273 * go ask the adapter to do all this for us 1274 */ 1275 error = scsipi_command(periph, 1276 (struct scsipi_generic *)&cmd, sizeof(cmd), 1277 (u_char *)bp->b_data, bp->b_bcount, 1278 0, ST_IO_TIME, bp, flags); 1279 if (error) { 1280 printf("%s: not queued, error %d\n", 1281 st->sc_dev.dv_xname, error); 1282 } 1283 } /* go back and see if we can cram more work in.. */ 1284 } 1285 1286 void 1287 stdone(xs) 1288 struct scsipi_xfer *xs; 1289 { 1290 struct st_softc *st = (void *)xs->xs_periph->periph_dev; 1291 1292 if (xs->bp != NULL) { 1293 if ((xs->bp->b_flags & B_READ) == B_WRITE) { 1294 st->flags |= ST_WRITTEN; 1295 } else { 1296 st->flags &= ~ST_WRITTEN; 1297 } 1298 #if NRND > 0 1299 rnd_add_uint32(&st->rnd_source, xs->bp->b_blkno); 1300 #endif 1301 1302 if ((st->flags & ST_POSUPDATED) == 0) { 1303 if (xs->bp->b_flags & B_ERROR) { 1304 st->fileno = st->blkno = -1; 1305 } else if (st->blkno != -1) { 1306 if (st->flags & ST_FIXEDBLOCKS) { 1307 st->blkno += 1308 (xs->bp->b_bcount / st->blksize); 1309 } else { 1310 st->blkno++; 1311 } 1312 } 1313 } 1314 } 1315 } 1316 1317 int 1318 stread(dev, uio, iomode) 1319 dev_t dev; 1320 struct uio *uio; 1321 int iomode; 1322 { 1323 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1324 1325 return (physio(ststrategy, NULL, dev, B_READ, 1326 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1327 } 1328 1329 int 1330 stwrite(dev, uio, iomode) 1331 dev_t dev; 1332 struct uio *uio; 1333 int iomode; 1334 { 1335 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1336 1337 return (physio(ststrategy, NULL, dev, B_WRITE, 1338 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1339 } 1340 1341 /* 1342 * Perform special action on behalf of the user; 1343 * knows about the internals of this device 1344 */ 1345 int 1346 stioctl(dev, cmd, arg, flag, p) 1347 dev_t dev; 1348 u_long cmd; 1349 caddr_t arg; 1350 int flag; 1351 struct proc *p; 1352 { 1353 int error = 0; 1354 int unit; 1355 int number, nmarks, dsty; 1356 int flags; 1357 struct st_softc *st; 1358 int hold_blksize; 1359 u_int8_t hold_density; 1360 struct mtop *mt = (struct mtop *) arg; 1361 1362 /* 1363 * Find the device that the user is talking about 1364 */ 1365 flags = 0; /* give error messages, act on errors etc. */ 1366 unit = STUNIT(dev); 1367 dsty = STDSTY(dev); 1368 st = st_cd.cd_devs[unit]; 1369 hold_blksize = st->blksize; 1370 hold_density = st->density; 1371 1372 switch ((u_int) cmd) { 1373 1374 case MTIOCGET: { 1375 struct mtget *g = (struct mtget *) arg; 1376 /* 1377 * (to get the current state of READONLY) 1378 */ 1379 error = st->ops(st, ST_OPS_MODESENSE, XS_CTL_SILENT); 1380 if (error) { 1381 /* 1382 * Ignore the error if in control mode; 1383 * this is mandated by st(4). 1384 */ 1385 if (STMODE(dev) != CTRL_MODE) 1386 break; 1387 error = 0; 1388 } 1389 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("[ioctl: get status]\n")); 1390 memset(g, 0, sizeof(struct mtget)); 1391 g->mt_type = 0x7; /* Ultrix compat *//*? */ 1392 g->mt_blksiz = st->blksize; 1393 g->mt_density = st->density; 1394 g->mt_mblksiz[0] = st->modes[0].blksize; 1395 g->mt_mblksiz[1] = st->modes[1].blksize; 1396 g->mt_mblksiz[2] = st->modes[2].blksize; 1397 g->mt_mblksiz[3] = st->modes[3].blksize; 1398 g->mt_mdensity[0] = st->modes[0].density; 1399 g->mt_mdensity[1] = st->modes[1].density; 1400 g->mt_mdensity[2] = st->modes[2].density; 1401 g->mt_mdensity[3] = st->modes[3].density; 1402 g->mt_fileno = st->fileno; 1403 g->mt_blkno = st->blkno; 1404 if (st->flags & ST_READONLY) 1405 g->mt_dsreg |= MT_DS_RDONLY; 1406 if (st->flags & ST_MOUNTED) 1407 g->mt_dsreg |= MT_DS_MOUNTED; 1408 g->mt_resid = st->mt_resid; 1409 g->mt_erreg = st->mt_erreg; 1410 /* 1411 * clear latched errors. 1412 */ 1413 st->mt_resid = 0; 1414 st->mt_erreg = 0; 1415 st->asc = 0; 1416 st->ascq = 0; 1417 break; 1418 } 1419 case MTIOCTOP: { 1420 1421 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1422 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1423 mt->mt_count)); 1424 1425 /* compat: in U*x it is a short */ 1426 number = mt->mt_count; 1427 switch ((short) (mt->mt_op)) { 1428 case MTWEOF: /* write an end-of-file record */ 1429 error = st_write_filemarks(st, number, flags); 1430 break; 1431 case MTBSF: /* backward space file */ 1432 number = -number; 1433 case MTFSF: /* forward space file */ 1434 error = st_check_eod(st, FALSE, &nmarks, flags); 1435 if (!error) 1436 error = st_space(st, number - nmarks, 1437 SP_FILEMARKS, flags); 1438 break; 1439 case MTBSR: /* backward space record */ 1440 number = -number; 1441 case MTFSR: /* forward space record */ 1442 error = st_check_eod(st, TRUE, &nmarks, flags); 1443 if (!error) 1444 error = st_space(st, number, SP_BLKS, flags); 1445 break; 1446 case MTREW: /* rewind */ 1447 error = st_rewind(st, 0, flags); 1448 break; 1449 case MTOFFL: /* rewind and put the drive offline */ 1450 st_unmount(st, EJECT); 1451 break; 1452 case MTNOP: /* no operation, sets status only */ 1453 break; 1454 case MTRETEN: /* retension the tape */ 1455 error = st_load(st, LD_RETENSION, flags); 1456 if (!error) 1457 error = st_load(st, LD_LOAD, flags); 1458 break; 1459 case MTEOM: /* forward space to end of media */ 1460 error = st_check_eod(st, FALSE, &nmarks, flags); 1461 if (!error) 1462 error = st_space(st, 1, SP_EOM, flags); 1463 break; 1464 case MTCACHE: /* enable controller cache */ 1465 st->flags &= ~ST_DONTBUFFER; 1466 goto try_new_value; 1467 case MTNOCACHE: /* disable controller cache */ 1468 st->flags |= ST_DONTBUFFER; 1469 goto try_new_value; 1470 case MTERASE: /* erase volume */ 1471 error = st_erase(st, number, flags); 1472 break; 1473 case MTSETBSIZ: /* Set block size for device */ 1474 #ifdef NOTYET 1475 if (!(st->flags & ST_NEW_MOUNT)) { 1476 uprintf("re-mount tape before changing blocksize"); 1477 error = EINVAL; 1478 break; 1479 } 1480 #endif 1481 if (number == 0) 1482 st->flags &= ~ST_FIXEDBLOCKS; 1483 else { 1484 if ((st->blkmin || st->blkmax) && 1485 (number < st->blkmin || 1486 number > st->blkmax)) { 1487 error = EINVAL; 1488 break; 1489 } 1490 st->flags |= ST_FIXEDBLOCKS; 1491 } 1492 st->blksize = number; 1493 st->flags |= ST_BLOCK_SET; /*XXX */ 1494 goto try_new_value; 1495 1496 case MTSETDNSTY: /* Set density for device and mode */ 1497 /* 1498 * Any number >= 0 and <= 0xff is legal. Numbers 1499 * above 0x80 are 'vendor unique'. 1500 */ 1501 if (number < 0 || number > 255) { 1502 error = EINVAL; 1503 break; 1504 } else 1505 st->density = number; 1506 goto try_new_value; 1507 1508 case MTCMPRESS: 1509 error = st->ops(st, (number == 0) ? 1510 ST_OPS_CMPRSS_OFF : ST_OPS_CMPRSS_ON, 1511 XS_CTL_SILENT); 1512 break; 1513 1514 case MTEWARN: 1515 if (number) 1516 st->flags |= ST_EARLYWARN; 1517 else 1518 st->flags &= ~ST_EARLYWARN; 1519 break; 1520 1521 default: 1522 error = EINVAL; 1523 } 1524 break; 1525 } 1526 case MTIOCIEOT: 1527 case MTIOCEEOT: 1528 break; 1529 1530 case MTIOCRDSPOS: 1531 error = st_rdpos(st, 0, (u_int32_t *) arg); 1532 break; 1533 1534 case MTIOCRDHPOS: 1535 error = st_rdpos(st, 1, (u_int32_t *) arg); 1536 break; 1537 1538 case MTIOCSLOCATE: 1539 error = st_setpos(st, 0, (u_int32_t *) arg); 1540 break; 1541 1542 case MTIOCHLOCATE: 1543 error = st_setpos(st, 1, (u_int32_t *) arg); 1544 break; 1545 1546 1547 default: 1548 error = scsipi_do_ioctl(st->sc_periph, dev, cmd, arg, 1549 flag, p); 1550 break; 1551 } 1552 return (error); 1553 /*-----------------------------*/ 1554 try_new_value: 1555 /* 1556 * Check that the mode being asked for is aggreeable to the 1557 * drive. If not, put it back the way it was. 1558 * 1559 * If in control mode, we can make (persistent) mode changes 1560 * even if no medium is loaded (see st(4)). 1561 */ 1562 if ((STMODE(dev) != CTRL_MODE || (st->flags & ST_MOUNTED) != 0) && 1563 (error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 1564 /* put it back as it was */ 1565 printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); 1566 st->density = hold_density; 1567 st->blksize = hold_blksize; 1568 if (st->blksize) 1569 st->flags |= ST_FIXEDBLOCKS; 1570 else 1571 st->flags &= ~ST_FIXEDBLOCKS; 1572 return (error); 1573 } 1574 /* 1575 * As the drive liked it, if we are setting a new default, 1576 * set it into the structures as such. 1577 * 1578 * The means for deciding this are not finalised yet- but 1579 * if the device was opened in Control Mode, the values 1580 * are persistent now across mounts. 1581 */ 1582 if (STMODE(dev) == CTRL_MODE) { 1583 switch ((short) (mt->mt_op)) { 1584 case MTSETBSIZ: 1585 st->modes[dsty].blksize = st->blksize; 1586 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1587 break; 1588 case MTSETDNSTY: 1589 st->modes[dsty].density = st->density; 1590 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1591 break; 1592 } 1593 } 1594 return (0); 1595 } 1596 1597 /* 1598 * Do a synchronous read. 1599 */ 1600 int 1601 st_read(st, buf, size, flags) 1602 struct st_softc *st; 1603 int size; 1604 int flags; 1605 char *buf; 1606 { 1607 struct scsi_rw_tape cmd; 1608 1609 /* 1610 * If it's a null transfer, return immediatly 1611 */ 1612 if (size == 0) 1613 return (0); 1614 memset(&cmd, 0, sizeof(cmd)); 1615 cmd.opcode = READ; 1616 if (st->flags & ST_FIXEDBLOCKS) { 1617 cmd.byte2 |= SRW_FIXED; 1618 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1619 cmd.len); 1620 } else 1621 _lto3b(size, cmd.len); 1622 return (scsipi_command(st->sc_periph, 1623 (struct scsipi_generic *)&cmd, sizeof(cmd), 1624 (u_char *)buf, size, 0, ST_IO_TIME, NULL, flags | XS_CTL_DATA_IN)); 1625 } 1626 1627 /* 1628 * issue an erase command 1629 */ 1630 int 1631 st_erase(st, full, flags) 1632 struct st_softc *st; 1633 int full, flags; 1634 { 1635 int tmo; 1636 struct scsi_erase cmd; 1637 1638 /* 1639 * Full erase means set LONG bit in erase command, which asks 1640 * the drive to erase the entire unit. Without this bit, we're 1641 * asking the drive to write an erase gap. 1642 */ 1643 memset(&cmd, 0, sizeof(cmd)); 1644 cmd.opcode = ERASE; 1645 if (full) { 1646 cmd.byte2 = SE_LONG; 1647 tmo = ST_SPC_TIME; 1648 } else { 1649 tmo = ST_IO_TIME; 1650 } 1651 1652 /* 1653 * XXX We always do this asynchronously, for now, unless the device 1654 * has the ST_Q_ERASE_NOIMM quirk. How long should we wait if we 1655 * want to (eventually) to it synchronously? 1656 */ 1657 if ((st->quirks & ST_Q_ERASE_NOIMM) == 0) 1658 cmd.byte2 |= SE_IMMED; 1659 1660 return (scsipi_command(st->sc_periph, 1661 (struct scsipi_generic *)&cmd, sizeof(cmd), 1662 0, 0, ST_RETRIES, tmo, NULL, flags)); 1663 } 1664 1665 /* 1666 * skip N blocks/filemarks/seq filemarks/eom 1667 */ 1668 int 1669 st_space(st, number, what, flags) 1670 struct st_softc *st; 1671 u_int what; 1672 int flags; 1673 int number; 1674 { 1675 struct scsi_space cmd; 1676 int error; 1677 1678 switch (what) { 1679 case SP_BLKS: 1680 if (st->flags & ST_PER_ACTION) { 1681 if (number > 0) { 1682 st->flags &= ~ST_PER_ACTION; 1683 return (EIO); 1684 } else if (number < 0) { 1685 if (st->flags & ST_AT_FILEMARK) { 1686 /* 1687 * Handling of ST_AT_FILEMARK 1688 * in st_space will fill in the 1689 * right file mark count. 1690 */ 1691 error = st_space(st, 0, SP_FILEMARKS, 1692 flags); 1693 if (error) 1694 return (error); 1695 } 1696 if (st->flags & ST_BLANK_READ) { 1697 st->flags &= ~ST_BLANK_READ; 1698 return (EIO); 1699 } 1700 st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); 1701 } 1702 } 1703 break; 1704 case SP_FILEMARKS: 1705 if (st->flags & ST_EIO_PENDING) { 1706 if (number > 0) { 1707 /* pretend we just discovered the error */ 1708 st->flags &= ~ST_EIO_PENDING; 1709 return (EIO); 1710 } else if (number < 0) { 1711 /* back away from the error */ 1712 st->flags &= ~ST_EIO_PENDING; 1713 } 1714 } 1715 if (st->flags & ST_AT_FILEMARK) { 1716 st->flags &= ~ST_AT_FILEMARK; 1717 number--; 1718 } 1719 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 1720 /* back away from unwritten tape */ 1721 st->flags &= ~ST_BLANK_READ; 1722 number++; /* XXX dubious */ 1723 } 1724 break; 1725 case SP_EOM: 1726 if (st->flags & ST_EOM_PENDING) { 1727 /* we're already there */ 1728 st->flags &= ~ST_EOM_PENDING; 1729 return (0); 1730 } 1731 if (st->flags & ST_EIO_PENDING) { 1732 /* pretend we just discovered the error */ 1733 st->flags &= ~ST_EIO_PENDING; 1734 return (EIO); 1735 } 1736 if (st->flags & ST_AT_FILEMARK) 1737 st->flags &= ~ST_AT_FILEMARK; 1738 break; 1739 } 1740 if (number == 0) 1741 return (0); 1742 1743 memset(&cmd, 0, sizeof(cmd)); 1744 cmd.opcode = SPACE; 1745 cmd.byte2 = what; 1746 _lto3b(number, cmd.number); 1747 1748 st->flags &= ~ST_POSUPDATED; 1749 st->last_ctl_resid = 0; 1750 error = scsipi_command(st->sc_periph, 1751 (struct scsipi_generic *)&cmd, sizeof(cmd), 1752 0, 0, 0, ST_SPC_TIME, NULL, flags); 1753 1754 if (error == 0 && (st->flags & ST_POSUPDATED) == 0) { 1755 number = number - st->last_ctl_resid; 1756 if (what == SP_BLKS) { 1757 if (st->blkno != -1) { 1758 st->blkno += number; 1759 } 1760 } else if (what == SP_FILEMARKS) { 1761 if (st->fileno != -1) { 1762 st->fileno += number; 1763 if (number > 0) { 1764 st->blkno = 0; 1765 } else if (number < 0) { 1766 st->blkno = -1; 1767 } 1768 } 1769 } else if (what == SP_EOM) { 1770 /* 1771 * This loses us relative position. 1772 */ 1773 st->fileno = st->blkno = -1; 1774 } 1775 } 1776 return (error); 1777 } 1778 1779 /* 1780 * write N filemarks 1781 */ 1782 int 1783 st_write_filemarks(st, number, flags) 1784 struct st_softc *st; 1785 int flags; 1786 int number; 1787 { 1788 int error; 1789 struct scsi_write_filemarks cmd; 1790 1791 /* 1792 * It's hard to write a negative number of file marks. 1793 * Don't try. 1794 */ 1795 if (number < 0) 1796 return (EINVAL); 1797 switch (number) { 1798 case 0: /* really a command to sync the drive's buffers */ 1799 break; 1800 case 1: 1801 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 1802 st->flags &= ~ST_WRITTEN; 1803 else 1804 st->flags |= ST_FM_WRITTEN; 1805 st->flags &= ~ST_PER_ACTION; 1806 break; 1807 default: 1808 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 1809 } 1810 1811 memset(&cmd, 0, sizeof(cmd)); 1812 cmd.opcode = WRITE_FILEMARKS; 1813 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1814 cmd.byte2 = SR_IMMED; 1815 /* 1816 * The ATAPI Onstream DI-30 doesn't support writing filemarks, but 1817 * WRITE_FILEMARKS is still used to flush the buffer 1818 */ 1819 if ((st->quirks & ST_Q_NOFILEMARKS) == 0) 1820 _lto3b(number, cmd.number); 1821 1822 /* XXX WE NEED TO BE ABLE TO GET A RESIDIUAL XXX */ 1823 error = scsipi_command(st->sc_periph, 1824 (struct scsipi_generic *)&cmd, sizeof(cmd), 1825 0, 0, 0, ST_IO_TIME * 4, NULL, flags); 1826 if (error == 0 && st->fileno != -1) { 1827 st->fileno += number; 1828 } 1829 return (error); 1830 } 1831 1832 /* 1833 * Make sure the right number of file marks is on tape if the 1834 * tape has been written. If the position argument is true, 1835 * leave the tape positioned where it was originally. 1836 * 1837 * nmarks returns the number of marks to skip (or, if position 1838 * true, which were skipped) to get back original position. 1839 */ 1840 int 1841 st_check_eod(st, position, nmarks, flags) 1842 struct st_softc *st; 1843 boolean position; 1844 int *nmarks; 1845 int flags; 1846 { 1847 int error; 1848 1849 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 1850 default: 1851 *nmarks = 0; 1852 return (0); 1853 case ST_WRITTEN: 1854 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 1855 *nmarks = 1; 1856 break; 1857 case ST_WRITTEN | ST_2FM_AT_EOD: 1858 *nmarks = 2; 1859 } 1860 error = st_write_filemarks(st, *nmarks, flags); 1861 if (position && !error) 1862 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 1863 return (error); 1864 } 1865 1866 /* 1867 * load/unload/retension 1868 */ 1869 int 1870 st_load(st, type, flags) 1871 struct st_softc *st; 1872 u_int type; 1873 int flags; 1874 { 1875 int error; 1876 struct scsi_load cmd; 1877 1878 if (type != LD_LOAD) { 1879 int nmarks; 1880 1881 error = st_check_eod(st, FALSE, &nmarks, flags); 1882 if (error) { 1883 printf("%s: failed to write closing filemarks at " 1884 "unload, errno=%d\n", st->sc_dev.dv_xname, error); 1885 return (error); 1886 } 1887 } 1888 if (st->quirks & ST_Q_IGNORE_LOADS) { 1889 if (type == LD_LOAD) { 1890 /* 1891 * If we ignore loads, at least we should try a rewind. 1892 */ 1893 return st_rewind(st, 0, flags); 1894 } 1895 /* otherwise, we should do what's asked of us */ 1896 } 1897 1898 memset(&cmd, 0, sizeof(cmd)); 1899 cmd.opcode = LOAD; 1900 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1901 cmd.byte2 = SR_IMMED; 1902 cmd.how = type; 1903 1904 error = scsipi_command(st->sc_periph, 1905 (struct scsipi_generic *)&cmd, sizeof(cmd), 1906 0, 0, ST_RETRIES, ST_SPC_TIME, NULL, flags); 1907 if (error) { 1908 printf("%s: error %d in st_load (op %d)\n", 1909 st->sc_dev.dv_xname, error, type); 1910 } 1911 return (error); 1912 } 1913 1914 /* 1915 * Rewind the device 1916 */ 1917 int 1918 st_rewind(st, immediate, flags) 1919 struct st_softc *st; 1920 u_int immediate; 1921 int flags; 1922 { 1923 struct scsi_rewind cmd; 1924 int error; 1925 int nmarks; 1926 1927 error = st_check_eod(st, FALSE, &nmarks, flags); 1928 if (error) { 1929 printf("%s: failed to write closing filemarks at " 1930 "rewind, errno=%d\n", st->sc_dev.dv_xname, error); 1931 return (error); 1932 } 1933 st->flags &= ~ST_PER_ACTION; 1934 1935 /* 1936 * ATAPI tapes always need immediate to be set 1937 */ 1938 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1939 immediate = SR_IMMED; 1940 1941 memset(&cmd, 0, sizeof(cmd)); 1942 cmd.opcode = REWIND; 1943 cmd.byte2 = immediate; 1944 1945 error = scsipi_command(st->sc_periph, 1946 (struct scsipi_generic *)&cmd, sizeof(cmd), 0, 0, ST_RETRIES, 1947 immediate ? ST_CTL_TIME: ST_SPC_TIME, NULL, flags); 1948 if (error) { 1949 printf("%s: error %d trying to rewind\n", 1950 st->sc_dev.dv_xname, error); 1951 /* lost position */ 1952 st->fileno = st->blkno = -1; 1953 } else { 1954 st->fileno = st->blkno = 0; 1955 } 1956 return (error); 1957 } 1958 1959 int 1960 st_rdpos(st, hard, blkptr) 1961 struct st_softc *st; 1962 int hard; 1963 u_int32_t *blkptr; 1964 { 1965 int error; 1966 u_int8_t posdata[20]; 1967 struct scsi_tape_read_position cmd; 1968 1969 /* 1970 * We try and flush any buffered writes here if we were writing 1971 * and we're trying to get hardware block position. It eats 1972 * up performance substantially, but I'm wary of drive firmware. 1973 * 1974 * I think that *logical* block position is probably okay- 1975 * but hardware block position might have to wait for data 1976 * to hit media to be valid. Caveat Emptor. 1977 */ 1978 1979 if (hard && (st->flags & ST_WRITTEN)) { 1980 /* 1981 * First flush any pending writes... 1982 */ 1983 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 1984 /* 1985 * The latter case is for 'write protected' tapes 1986 * which are too stupid to recognize a zero count 1987 * for writing filemarks as a no-op. 1988 */ 1989 if (error != 0 && error != EACCES && error != EROFS) 1990 return (error); 1991 } 1992 1993 memset(&cmd, 0, sizeof(cmd)); 1994 memset(&posdata, 0, sizeof(posdata)); 1995 cmd.opcode = READ_POSITION; 1996 if (hard) 1997 cmd.byte1 = 1; 1998 1999 error = scsipi_command(st->sc_periph, 2000 (struct scsipi_generic *)&cmd, sizeof(cmd), (u_char *)&posdata, 2001 sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, 2002 XS_CTL_SILENT | XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); 2003 2004 if (error == 0) { 2005 #if 0 2006 printf("posdata:"); 2007 for (hard = 0; hard < sizeof(posdata); hard++) 2008 printf("%02x ", posdata[hard] & 0xff); 2009 printf("\n"); 2010 #endif 2011 if (posdata[0] & 0x4) /* Block Position Unknown */ 2012 error = EINVAL; 2013 else 2014 *blkptr = _4btol(&posdata[4]); 2015 } 2016 return (error); 2017 } 2018 2019 int 2020 st_setpos(st, hard, blkptr) 2021 struct st_softc *st; 2022 int hard; 2023 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, 2044 (struct scsipi_generic *)&cmd, sizeof(cmd), 2045 NULL, 0, ST_RETRIES, ST_SPC_TIME, NULL, 0); 2046 /* 2047 * Note file && block number position now unknown (if 2048 * these things ever start being maintained in this driver) 2049 */ 2050 st->fileno = st->blkno = -1; 2051 return (error); 2052 } 2053 2054 2055 /* 2056 * Look at the returned sense and act on the error and determine 2057 * the unix error number to pass back..., 0 (== report no error), 2058 * -1 = retry the operation, -2 continue error processing. 2059 */ 2060 int 2061 st_interpret_sense(xs) 2062 struct scsipi_xfer *xs; 2063 { 2064 struct scsipi_periph *periph = xs->xs_periph; 2065 struct scsipi_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->error_code & SSD_ERRCODE) != 0x70 && 2078 (sense->error_code & SSD_ERRCODE) != 0x71) { /* DEFFERRED */ 2079 return (retval); 2080 } 2081 2082 if (sense->error_code & SSD_ERRCODE_VALID) 2083 info = _4btol(sense->info); 2084 else 2085 info = (st->flags & ST_FIXEDBLOCKS) ? 2086 xs->datalen / st->blksize : xs->datalen; 2087 key = sense->flags & SSD_KEY; 2088 st->mt_erreg = key; 2089 st->asc = sense->add_sense_code; 2090 st->ascq = sense->add_sense_code_qual; 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_active(&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->error_code & SSD_ERRCODE_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->error_code & SSD_ERRCODE_VALID) != 0) { 2291 switch (key) { 2292 case SKEY_NOT_READY: 2293 case SKEY_ILLEGAL_REQUEST: 2294 case SKEY_UNIT_ATTENTION: 2295 case SKEY_WRITE_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->cmd_spec_info[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 int 2340 st_touch_tape(st) 2341 struct st_softc *st; 2342 { 2343 char *buf; 2344 int readsize; 2345 int error; 2346 2347 buf = malloc(1024, M_TEMP, M_NOWAIT); 2348 if (buf == NULL) 2349 return (ENOMEM); 2350 2351 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 2352 goto bad; 2353 2354 /* 2355 * If the block size is already known from the 2356 * sense data, use it. Else start probing at 1024. 2357 */ 2358 if (st->media_blksize > 0) 2359 st->blksize = st->media_blksize; 2360 else 2361 st->blksize = 1024; 2362 2363 do { 2364 switch (st->blksize) { 2365 case 512: 2366 case 1024: 2367 readsize = st->blksize; 2368 st->flags |= ST_FIXEDBLOCKS; 2369 break; 2370 default: 2371 readsize = 1; 2372 st->flags &= ~ST_FIXEDBLOCKS; 2373 } 2374 if ((error = st->ops(st, ST_OPS_MODESELECT, XS_CTL_SILENT)) 2375 != 0) { 2376 /* 2377 * The device did not agree with the proposed 2378 * block size. If we exhausted our options, 2379 * return failure, else try another. 2380 */ 2381 if (readsize == 1) 2382 goto bad; 2383 st->blksize -= 512; 2384 continue; 2385 } 2386 st_read(st, buf, readsize, XS_CTL_SILENT); /* XXX */ 2387 if ((error = st_rewind(st, 0, 0)) != 0) { 2388 bad: free(buf, M_TEMP); 2389 return (error); 2390 } 2391 } while (readsize != 1 && readsize > st->blksize); 2392 2393 free(buf, M_TEMP); 2394 return (0); 2395 } 2396 2397 int 2398 stdump(dev, blkno, va, size) 2399 dev_t dev; 2400 daddr_t blkno; 2401 caddr_t va; 2402 size_t size; 2403 { 2404 2405 /* Not implemented. */ 2406 return (ENXIO); 2407 } 2408