st.c revision 1.149
1 /* $NetBSD: st.c,v 1.149 2002/01/12 20:30:11 bouyer Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Charles M. Hannum. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Originally written by Julian Elischer (julian (at) tfs.com) 41 * for TRW Financial Systems for use under the MACH(2.5) operating system. 42 * 43 * TRW Financial Systems, in accordance with their agreement with Carnegie 44 * Mellon University, makes this software available to CMU to distribute 45 * or use in any manner that they see fit as long as this message is kept with 46 * the software. For this reason TFS also grants any other persons or 47 * organisations permission to use or modify this software. 48 * 49 * TFS supplies this software to be publicly redistributed 50 * on the understanding that TFS is not responsible for the correct 51 * functioning of this software in any circumstances. 52 * 53 * Ported to run under 386BSD by Julian Elischer (julian (at) tfs.com) Sept 1992 54 * major changes by Julian Elischer (julian (at) jules.dialix.oz.au) May 1993 55 * 56 * A lot of rewhacking done by mjacob (mjacob (at) nas.nasa.gov). 57 */ 58 59 #include <sys/cdefs.h> 60 __KERNEL_RCSID(0, "$NetBSD: st.c,v 1.149 2002/01/12 20:30:11 bouyer Exp $"); 61 62 #include "opt_scsi.h" 63 64 #include <sys/param.h> 65 #include <sys/systm.h> 66 #include <sys/fcntl.h> 67 #include <sys/errno.h> 68 #include <sys/ioctl.h> 69 #include <sys/malloc.h> 70 #include <sys/buf.h> 71 #include <sys/proc.h> 72 #include <sys/user.h> 73 #include <sys/mtio.h> 74 #include <sys/device.h> 75 #include <sys/conf.h> 76 #include <sys/kernel.h> 77 #include <sys/vnode.h> 78 79 #include <dev/scsipi/scsi_all.h> 80 #include <dev/scsipi/scsi_tape.h> 81 #include <dev/scsipi/stvar.h> 82 83 /* Defines for device specific stuff */ 84 #define DEF_FIXED_BSIZE 512 85 86 #define STMODE(z) ( minor(z) & 0x03) 87 #define STDSTY(z) ((minor(z) >> 2) & 0x03) 88 #define STUNIT(z) ((minor(z) >> 4) ) 89 #define STNMINOR 16 90 91 #define NORMAL_MODE 0 92 #define NOREW_MODE 1 93 #define EJECT_MODE 2 94 #define CTRL_MODE 3 95 96 #define FALSE 0 97 #define TRUE 1 98 99 #ifndef ST_MOUNT_DELAY 100 #define ST_MOUNT_DELAY 0 101 #endif 102 103 /* 104 * Define various devices that we know mis-behave in some way, 105 * and note how they are bad, so we can correct for them 106 */ 107 108 const struct st_quirk_inquiry_pattern st_quirk_patterns[] = { 109 {{T_SEQUENTIAL, T_REMOV, 110 " ", " ", " "}, {0, 0, { 111 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 112 {ST_Q_FORCE_BLKSIZE, 512, QIC_24}, /* minor 4-7 */ 113 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_1600}, /* minor 8-11 */ 114 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_6250} /* minor 12-15 */ 115 }}}, 116 {{T_SEQUENTIAL, T_REMOV, 117 "TANDBERG", " TDC 3600 ", ""}, {0, 12, { 118 {0, 0, 0}, /* minor 0-3 */ 119 {ST_Q_FORCE_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 120 {0, 0, QIC_150}, /* minor 8-11 */ 121 {0, 0, QIC_120} /* minor 12-15 */ 122 }}}, 123 {{T_SEQUENTIAL, T_REMOV, 124 "TANDBERG", " TDC 3800 ", ""}, {0, 0, { 125 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 126 {0, 0, QIC_525}, /* minor 4-7 */ 127 {0, 0, QIC_150}, /* minor 8-11 */ 128 {0, 0, QIC_120} /* minor 12-15 */ 129 }}}, 130 /* 131 * lacking a manual for the 4200, it's not clear what the 132 * specific density codes should be- the device is a 2.5GB 133 * capable QIC drive, those density codes aren't readily 134 * availabel. The 'default' will just have to do. 135 */ 136 {{T_SEQUENTIAL, T_REMOV, 137 "TANDBERG", " TDC 4200 ", ""}, {0, 0, { 138 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 139 {0, 0, QIC_525}, /* minor 4-7 */ 140 {0, 0, QIC_150}, /* minor 8-11 */ 141 {0, 0, QIC_120} /* minor 12-15 */ 142 }}}, 143 /* 144 * At least -005 and -007 need this. I'll assume they all do unless I 145 * hear otherwise. - mycroft, 31MAR1994 146 */ 147 {{T_SEQUENTIAL, T_REMOV, 148 "ARCHIVE ", "VIPER 2525 25462", ""}, {0, 0, { 149 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 150 {ST_Q_SENSE_HELP, 0, QIC_525}, /* minor 4-7 */ 151 {0, 0, QIC_150}, /* minor 8-11 */ 152 {0, 0, QIC_120} /* minor 12-15 */ 153 }}}, 154 /* 155 * One user reports that this works for his tape drive. It probably 156 * needs more work. - mycroft, 09APR1994 157 */ 158 {{T_SEQUENTIAL, T_REMOV, 159 "SANKYO ", "CP525 ", ""}, {0, 0, { 160 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 161 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 162 {0, 0, QIC_150}, /* minor 8-11 */ 163 {0, 0, QIC_120} /* minor 12-15 */ 164 }}}, 165 {{T_SEQUENTIAL, T_REMOV, 166 "ANRITSU ", "DMT780 ", ""}, {0, 0, { 167 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 168 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 169 {0, 0, QIC_150}, /* minor 8-11 */ 170 {0, 0, QIC_120} /* minor 12-15 */ 171 }}}, 172 {{T_SEQUENTIAL, T_REMOV, 173 "ARCHIVE ", "VIPER 150 21247", ""}, {ST_Q_ERASE_NOIMM, 12, { 174 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 175 {0, 0, QIC_150}, /* minor 4-7 */ 176 {0, 0, QIC_120}, /* minor 8-11 */ 177 {0, 0, QIC_24} /* minor 12-15 */ 178 }}}, 179 {{T_SEQUENTIAL, T_REMOV, 180 "ARCHIVE ", "VIPER 150 21531", ""}, {ST_Q_ERASE_NOIMM, 12, { 181 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 182 {0, 0, QIC_150}, /* minor 4-7 */ 183 {0, 0, QIC_120}, /* minor 8-11 */ 184 {0, 0, QIC_24} /* minor 12-15 */ 185 }}}, 186 {{T_SEQUENTIAL, T_REMOV, 187 "WANGTEK ", "5099ES SCSI", ""}, {0, 0, { 188 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 189 {0, 0, QIC_11}, /* minor 4-7 */ 190 {0, 0, QIC_24}, /* minor 8-11 */ 191 {0, 0, QIC_24} /* minor 12-15 */ 192 }}}, 193 {{T_SEQUENTIAL, T_REMOV, 194 "WANGTEK ", "5150ES SCSI", ""}, {0, 0, { 195 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 196 {0, 0, QIC_24}, /* minor 4-7 */ 197 {0, 0, QIC_120}, /* minor 8-11 */ 198 {0, 0, QIC_150} /* minor 12-15 */ 199 }}}, 200 {{T_SEQUENTIAL, T_REMOV, 201 "WANGTEK ", "5525ES SCSI REV7", ""}, {0, 0, { 202 {0, 0, 0}, /* minor 0-3 */ 203 {ST_Q_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 204 {0, 0, QIC_150}, /* minor 8-11 */ 205 {0, 0, QIC_120} /* minor 12-15 */ 206 }}}, 207 {{T_SEQUENTIAL, T_REMOV, 208 "WangDAT ", "Model 1300 ", ""}, {0, 0, { 209 {0, 0, 0}, /* minor 0-3 */ 210 {ST_Q_FORCE_BLKSIZE, 512, DDS}, /* minor 4-7 */ 211 {ST_Q_FORCE_BLKSIZE, 1024, DDS}, /* minor 8-11 */ 212 {ST_Q_FORCE_BLKSIZE, 0, DDS} /* minor 12-15 */ 213 }}}, 214 {{T_SEQUENTIAL, T_REMOV, 215 "EXABYTE ", "EXB-8200 ", "263H"}, {0, 5, { 216 {0, 0, 0}, /* minor 0-3 */ 217 {0, 0, 0}, /* minor 4-7 */ 218 {0, 0, 0}, /* minor 8-11 */ 219 {0, 0, 0} /* minor 12-15 */ 220 }}}, 221 {{T_SEQUENTIAL, T_REMOV, 222 "STK", "9490", ""}, 223 {ST_Q_FORCE_BLKSIZE, 0, { 224 {0, 0, 0}, /* minor 0-3 */ 225 {0, 0, 0}, /* minor 4-7 */ 226 {0, 0, 0}, /* minor 8-11 */ 227 {0, 0, 0} /* minor 12-15 */ 228 }}}, 229 {{T_SEQUENTIAL, T_REMOV, 230 "STK", "SD-3", ""}, 231 {ST_Q_FORCE_BLKSIZE, 0, { 232 {0, 0, 0}, /* minor 0-3 */ 233 {0, 0, 0}, /* minor 4-7 */ 234 {0, 0, 0}, /* minor 8-11 */ 235 {0, 0, 0} /* minor 12-15 */ 236 }}}, 237 {{T_SEQUENTIAL, T_REMOV, 238 "IBM", "03590", ""}, {ST_Q_IGNORE_LOADS, 0, { 239 {0, 0, 0}, /* minor 0-3 */ 240 {0, 0, 0}, /* minor 4-7 */ 241 {0, 0, 0}, /* minor 8-11 */ 242 {0, 0, 0} /* minor 12-15 */ 243 }}}, 244 {{T_SEQUENTIAL, T_REMOV, 245 "HP ", "T4000s ", ""}, {ST_Q_UNIMODAL, 0, { 246 {0, 0, QIC_3095}, /* minor 0-3 */ 247 {0, 0, QIC_3095}, /* minor 4-7 */ 248 {0, 0, QIC_3095}, /* minor 8-11 */ 249 {0, 0, QIC_3095}, /* minor 12-15 */ 250 }}}, 251 #if 0 252 {{T_SEQUENTIAL, T_REMOV, 253 "EXABYTE ", "EXB-8200 ", ""}, {0, 12, { 254 {0, 0, 0}, /* minor 0-3 */ 255 {0, 0, 0}, /* minor 4-7 */ 256 {0, 0, 0}, /* minor 8-11 */ 257 {0, 0, 0} /* minor 12-15 */ 258 }}}, 259 #endif 260 {{T_SEQUENTIAL, T_REMOV, 261 "TEAC ", "MT-2ST/N50 ", ""}, {ST_Q_IGNORE_LOADS, 0, { 262 {0, 0, 0}, /* minor 0-3 */ 263 {0, 0, 0}, /* minor 4-7 */ 264 {0, 0, 0}, /* minor 8-11 */ 265 {0, 0, 0} /* minor 12-15 */ 266 }}}, 267 {{T_SEQUENTIAL, T_REMOV, 268 "OnStream", "ADR50 Drive", ""}, {ST_Q_UNIMODAL, 0, { 269 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 270 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 4-7 */ 271 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 8-11 */ 272 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 12-15 */ 273 }}}, 274 {{T_SEQUENTIAL, T_REMOV, 275 "OnStream DI-30", "", "1.0"}, {ST_Q_NOFILEMARKS, 0, { 276 {0, 0, 0}, /* minor 0-3 */ 277 {0, 0, 0}, /* minor 4-7 */ 278 {0, 0, 0}, /* minor 8-11 */ 279 {0, 0, 0} /* minor 12-15 */ 280 }}}, 281 {{T_SEQUENTIAL, T_REMOV, 282 "NCR H621", "0-STD-03-46F880 ", ""}, {ST_Q_NOPREVENT, 0, { 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 }; 289 290 #define NOEJECT 0 291 #define EJECT 1 292 293 void st_identify_drive __P((struct st_softc *, 294 struct scsipi_inquiry_pattern *)); 295 void st_loadquirks __P((struct st_softc *)); 296 int st_mount_tape __P((dev_t, int)); 297 void st_unmount __P((struct st_softc *, boolean)); 298 int st_decide_mode __P((struct st_softc *, boolean)); 299 void ststart __P((struct scsipi_periph *)); 300 void stdone __P((struct scsipi_xfer *)); 301 int st_read __P((struct st_softc *, char *, int, int)); 302 int st_space __P((struct st_softc *, int, u_int, int)); 303 int st_write_filemarks __P((struct st_softc *, int, int)); 304 int st_check_eod __P((struct st_softc *, boolean, int *, int)); 305 int st_load __P((struct st_softc *, u_int, int)); 306 int st_rewind __P((struct st_softc *, u_int, int)); 307 int st_interpret_sense __P((struct scsipi_xfer *)); 308 int st_touch_tape __P((struct st_softc *)); 309 int st_erase __P((struct st_softc *, int full, int flags)); 310 int st_rdpos __P((struct st_softc *, int, u_int32_t *)); 311 int st_setpos __P((struct st_softc *, int, u_int32_t *)); 312 313 const struct scsipi_periphsw st_switch = { 314 st_interpret_sense, 315 ststart, 316 NULL, 317 stdone 318 }; 319 320 #if defined(ST_ENABLE_EARLYWARN) 321 #define ST_INIT_FLAGS ST_EARLYWARN 322 #else 323 #define ST_INIT_FLAGS 0 324 #endif 325 326 /* 327 * The routine called by the low level scsi routine when it discovers 328 * A device suitable for this driver 329 */ 330 void 331 stattach(parent, st, aux) 332 struct device *parent; 333 struct st_softc *st; 334 void *aux; 335 { 336 struct scsipibus_attach_args *sa = aux; 337 struct scsipi_periph *periph = sa->sa_periph; 338 339 SC_DEBUG(periph, SCSIPI_DB2, ("stattach: ")); 340 341 /* 342 * Store information needed to contact our base driver 343 */ 344 st->sc_periph = periph; 345 periph->periph_dev = &st->sc_dev; 346 periph->periph_switch = &st_switch; 347 348 /* 349 * Set initial flags 350 */ 351 352 st->flags = ST_INIT_FLAGS; 353 354 /* 355 * Check if the drive is a known criminal and take 356 * Any steps needed to bring it into line 357 */ 358 st_identify_drive(st, &sa->sa_inqbuf); 359 /* 360 * Use the subdriver to request information regarding the drive. 361 */ 362 printf("\n"); 363 printf("%s: %s", st->sc_dev.dv_xname, st->quirkdata ? "rogue, " : ""); 364 if (scsipi_test_unit_ready(periph, 365 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE) || 366 st->ops(st, ST_OPS_MODESENSE, 367 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE)) 368 printf("drive empty\n"); 369 else { 370 printf("density code %d, ", st->media_density); 371 if (st->media_blksize > 0) 372 printf("%d-byte", st->media_blksize); 373 else 374 printf("variable"); 375 printf(" blocks, write-%s\n", 376 (st->flags & ST_READONLY) ? "protected" : "enabled"); 377 } 378 379 /* 380 * Set up the buf queue for this device 381 */ 382 BUFQ_INIT(&st->buf_queue); 383 384 #if NRND > 0 385 rnd_attach_source(&st->rnd_source, st->sc_dev.dv_xname, 386 RND_TYPE_TAPE, 0); 387 #endif 388 } 389 390 int 391 stactivate(self, act) 392 struct device *self; 393 enum devact act; 394 { 395 int rv = 0; 396 397 switch (act) { 398 case DVACT_ACTIVATE: 399 rv = EOPNOTSUPP; 400 break; 401 402 case DVACT_DEACTIVATE: 403 /* 404 * Nothing to do; we key off the device's DVF_ACTIVE. 405 */ 406 break; 407 } 408 return (rv); 409 } 410 411 int 412 stdetach(self, flags) 413 struct device *self; 414 int flags; 415 { 416 struct st_softc *st = (struct st_softc *)self; 417 struct buf *bp; 418 int s, bmaj, cmaj, mn; 419 420 /* locate the major number */ 421 for (bmaj = 0; bmaj <= nblkdev; bmaj++) 422 if (bdevsw[bmaj].d_open == stopen) 423 break; 424 for (cmaj = 0; cmaj <= nchrdev; cmaj++) 425 if (cdevsw[cmaj].d_open == stopen) 426 break; 427 428 s = splbio(); 429 430 /* Kill off any queued buffers. */ 431 while ((bp = BUFQ_FIRST(&st->buf_queue)) != NULL) { 432 BUFQ_REMOVE(&st->buf_queue, bp); 433 bp->b_error = EIO; 434 bp->b_flags |= B_ERROR; 435 bp->b_resid = bp->b_bcount; 436 biodone(bp); 437 } 438 439 /* Kill off any pending commands. */ 440 scsipi_kill_pending(st->sc_periph); 441 442 splx(s); 443 444 /* Nuke the vnodes for any open instances */ 445 mn = STUNIT(self->dv_unit); 446 vdevgone(bmaj, mn, mn+STNMINOR-1, VBLK); 447 vdevgone(cmaj, mn, mn+STNMINOR-1, VCHR); 448 449 450 #if NRND > 0 451 /* Unhook the entropy source. */ 452 rnd_detach_source(&st->rnd_source); 453 #endif 454 455 return (0); 456 } 457 458 /* 459 * Use the inquiry routine in 'scsi_base' to get drive info so we can 460 * Further tailor our behaviour. 461 */ 462 void 463 st_identify_drive(st, inqbuf) 464 struct st_softc *st; 465 struct scsipi_inquiry_pattern *inqbuf; 466 { 467 struct st_quirk_inquiry_pattern *finger; 468 int priority; 469 470 finger = (struct st_quirk_inquiry_pattern *)scsipi_inqmatch(inqbuf, 471 (caddr_t)st_quirk_patterns, 472 sizeof(st_quirk_patterns) / sizeof(st_quirk_patterns[0]), 473 sizeof(st_quirk_patterns[0]), &priority); 474 if (priority != 0) { 475 st->quirkdata = &finger->quirkdata; 476 st->drive_quirks = finger->quirkdata.quirks; 477 st->quirks = finger->quirkdata.quirks; /* start value */ 478 st->page_0_size = finger->quirkdata.page_0_size; 479 st_loadquirks(st); 480 } 481 } 482 483 /* 484 * initialise the subdevices to the default (QUIRK) state. 485 * this will remove any setting made by the system operator or previous 486 * operations. 487 */ 488 void 489 st_loadquirks(st) 490 struct st_softc *st; 491 { 492 int i; 493 struct modes *mode; 494 struct modes *mode2; 495 496 mode = st->quirkdata->modes; 497 mode2 = st->modes; 498 for (i = 0; i < 4; i++) { 499 memset(mode2, 0, sizeof(struct modes)); 500 st->modeflags[i] &= ~(BLKSIZE_SET_BY_QUIRK | 501 DENSITY_SET_BY_QUIRK | BLKSIZE_SET_BY_USER | 502 DENSITY_SET_BY_USER); 503 if ((mode->quirks | st->drive_quirks) & ST_Q_FORCE_BLKSIZE) { 504 mode2->blksize = mode->blksize; 505 st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; 506 } 507 if (mode->density) { 508 mode2->density = mode->density; 509 st->modeflags[i] |= DENSITY_SET_BY_QUIRK; 510 } 511 mode2->quirks |= mode->quirks; 512 mode++; 513 mode2++; 514 } 515 } 516 517 /* 518 * open the device. 519 */ 520 int 521 stopen(dev, flags, mode, p) 522 dev_t dev; 523 int flags; 524 int mode; 525 struct proc *p; 526 { 527 u_int stmode, dsty; 528 int error, sflags, unit, tries, ntries; 529 struct st_softc *st; 530 struct scsipi_periph *periph; 531 struct scsipi_adapter *adapt; 532 533 unit = STUNIT(dev); 534 if (unit >= st_cd.cd_ndevs) 535 return (ENXIO); 536 st = st_cd.cd_devs[unit]; 537 if (st == NULL) 538 return (ENXIO); 539 540 stmode = STMODE(dev); 541 dsty = STDSTY(dev); 542 543 periph = st->sc_periph; 544 adapt = periph->periph_channel->chan_adapter; 545 546 SC_DEBUG(periph, SCSIPI_DB1, ("open: dev=0x%x (unit %d (of %d))\n", dev, 547 unit, st_cd.cd_ndevs)); 548 549 550 /* 551 * Only allow one at a time 552 */ 553 if (periph->periph_flags & PERIPH_OPEN) { 554 printf("%s: already open\n", st->sc_dev.dv_xname); 555 return (EBUSY); 556 } 557 558 if ((error = scsipi_adapter_addref(adapt)) != 0) 559 return (error); 560 561 /* 562 * clear any latched errors. 563 */ 564 st->mt_resid = 0; 565 st->mt_erreg = 0; 566 st->asc = 0; 567 st->ascq = 0; 568 569 /* 570 * Catch any unit attention errors. Be silent about this 571 * unless we're already mounted. We ignore media change 572 * if we're in control mode or not mounted yet. 573 */ 574 if ((st->flags & ST_MOUNTED) == 0 || stmode == CTRL_MODE) { 575 #ifdef SCSIDEBUG 576 sflags = XS_CTL_IGNORE_MEDIA_CHANGE; 577 #else 578 sflags = XS_CTL_SILENT|XS_CTL_IGNORE_MEDIA_CHANGE; 579 #endif 580 } else 581 sflags = 0; 582 583 /* 584 * If we're already mounted or we aren't configured for 585 * a mount delay, only try a test unit ready once. Otherwise, 586 * try up to ST_MOUNT_DELAY times with a rest interval of 587 * one second between each try. 588 */ 589 590 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0) { 591 ntries = 1; 592 } else { 593 ntries = ST_MOUNT_DELAY; 594 } 595 596 for (error = tries = 0; tries < ntries; tries++) { 597 int slpintr, oflags; 598 599 /* 600 * If we had no error, or we're opening the control mode 601 * device, we jump out right away. 602 */ 603 604 error = scsipi_test_unit_ready(periph, sflags); 605 if (error == 0 || stmode == CTRL_MODE) { 606 break; 607 } 608 609 /* 610 * We had an error. 611 * 612 * If we're already mounted or we aren't configured for 613 * a mount delay, or the error isn't a NOT READY error, 614 * skip to the error exit now. 615 */ 616 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0 || 617 (st->mt_key != SKEY_NOT_READY)) { 618 goto bad; 619 } 620 621 /* 622 * clear any latched errors. 623 */ 624 st->mt_resid = 0; 625 st->mt_erreg = 0; 626 st->asc = 0; 627 st->ascq = 0; 628 629 /* 630 * Fake that we have the device open so 631 * we block other apps from getting in. 632 */ 633 634 oflags = periph->periph_flags; 635 periph->periph_flags |= PERIPH_OPEN; 636 637 slpintr = tsleep(&lbolt, PUSER|PCATCH, "stload", 0); 638 639 periph->periph_flags = oflags; /* restore flags */ 640 if (slpintr) { 641 goto bad; 642 } 643 } 644 645 646 /* 647 * If the mode is 3 (e.g. minor = 3,7,11,15) then the device has 648 * been opened to set defaults and perform other, usually non-I/O 649 * related, operations. In this case, do a quick check to see 650 * whether the unit actually had a tape loaded (this will be known 651 * as to whether or not we got a NOT READY for the above 652 * unit attention). If a tape is there, go do a mount sequence. 653 */ 654 if (stmode == CTRL_MODE && st->mt_key == SKEY_NOT_READY) { 655 periph->periph_flags |= PERIPH_OPEN; 656 return (0); 657 } 658 659 /* 660 * If we get this far and had an error set, that means we failed 661 * to pass the 'test unit ready' test for the non-controlmode device, 662 * so we bounce the open. 663 */ 664 665 if (error) 666 return (error); 667 668 /* 669 * Else, we're now committed to saying we're open. 670 */ 671 672 periph->periph_flags |= PERIPH_OPEN; /* unit attn are now errors */ 673 674 /* 675 * If it's a different mode, or if the media has been 676 * invalidated, unmount the tape from the previous 677 * session but continue with open processing 678 */ 679 if (st->last_dsty != dsty || 680 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 681 st_unmount(st, NOEJECT); 682 683 /* 684 * If we are not mounted, then we should start a new 685 * mount session. 686 */ 687 if (!(st->flags & ST_MOUNTED)) { 688 if ((error = st_mount_tape(dev, flags)) != 0) 689 goto bad; 690 st->last_dsty = dsty; 691 } 692 693 SC_DEBUG(periph, SCSIPI_DB2, ("open complete\n")); 694 return (0); 695 696 bad: 697 st_unmount(st, NOEJECT); 698 scsipi_adapter_delref(adapt); 699 periph->periph_flags &= ~PERIPH_OPEN; 700 return (error); 701 } 702 703 /* 704 * close the device.. only called if we are the LAST 705 * occurence of an open device 706 */ 707 int 708 stclose(dev, flags, mode, p) 709 dev_t dev; 710 int flags; 711 int mode; 712 struct proc *p; 713 { 714 int stxx, error = 0; 715 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 716 struct scsipi_periph *periph = st->sc_periph; 717 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 718 719 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("closing\n")); 720 721 /* 722 * Make sure that a tape opened in write-only mode will have 723 * file marks written on it when closed, even if not written to. 724 * 725 * This is for SUN compatibility. Actually, the Sun way of 726 * things is to: 727 * 728 * only write filemarks if there are fmks to be written and 729 * - open for write (possibly read/write) 730 * - the last operation was a write 731 * or: 732 * - opened for wronly 733 * - no data was written (including filemarks) 734 */ 735 736 stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); 737 if (((flags & FWRITE) && stxx == ST_WRITTEN) || 738 ((flags & O_ACCMODE) == FWRITE && stxx == 0)) { 739 int nm; 740 error = st_check_eod(st, FALSE, &nm, 0); 741 } 742 743 switch (STMODE(dev)) { 744 case NORMAL_MODE: 745 st_unmount(st, NOEJECT); 746 break; 747 case NOREW_MODE: 748 case CTRL_MODE: 749 /* 750 * Leave mounted unless media seems to have been removed. 751 * 752 * Otherwise, if we're to terminate a tape with more than one 753 * filemark [ and because we're not rewinding here ], backspace 754 * one filemark so that later appends will see an unbroken 755 * sequence of: 756 * 757 * file - FMK - file - FMK ... file - FMK FMK (EOM) 758 */ 759 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 760 st_unmount(st, NOEJECT); 761 } else if (error == 0) { 762 /* 763 * ST_WRITTEN was preserved from above. 764 * 765 * All we need to know here is: 766 * 767 * Were we writing this tape and was the last 768 * operation a write? 769 * 770 * Are there supposed to be 2FM at EOD? 771 * 772 * If both statements are true, then we backspace 773 * one filemark. 774 */ 775 stxx |= (st->flags & ST_2FM_AT_EOD); 776 if ((flags & FWRITE) != 0 && 777 (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { 778 error = st_space(st, -1, SP_FILEMARKS, 0); 779 } 780 } 781 break; 782 case EJECT_MODE: 783 st_unmount(st, EJECT); 784 break; 785 } 786 787 scsipi_wait_drain(periph); 788 789 scsipi_adapter_delref(adapt); 790 periph->periph_flags &= ~PERIPH_OPEN; 791 792 return (error); 793 } 794 795 /* 796 * Start a new mount session. 797 * Copy in all the default parameters from the selected device mode. 798 * and try guess any that seem to be defaulted. 799 */ 800 int 801 st_mount_tape(dev, flags) 802 dev_t dev; 803 int flags; 804 { 805 int unit; 806 u_int dsty; 807 struct st_softc *st; 808 struct scsipi_periph *periph; 809 int error = 0; 810 811 unit = STUNIT(dev); 812 dsty = STDSTY(dev); 813 st = st_cd.cd_devs[unit]; 814 periph = st->sc_periph; 815 816 if (st->flags & ST_MOUNTED) 817 return (0); 818 819 SC_DEBUG(periph, SCSIPI_DB1, ("mounting\n ")); 820 st->flags |= ST_NEW_MOUNT; 821 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 822 /* 823 * If the media is new, then make sure we give it a chance to 824 * to do a 'load' instruction. (We assume it is new.) 825 */ 826 if ((error = st_load(st, LD_LOAD, XS_CTL_SILENT)) != 0) 827 return (error); 828 /* 829 * Throw another dummy instruction to catch 830 * 'Unit attention' errors. Many drives give 831 * these after doing a Load instruction (with 832 * the MEDIUM MAY HAVE CHANGED asc/ascq). 833 */ 834 scsipi_test_unit_ready(periph, XS_CTL_SILENT); /* XXX */ 835 836 /* 837 * Some devices can't tell you much until they have been 838 * asked to look at the media. This quirk does this. 839 */ 840 if (st->quirks & ST_Q_SENSE_HELP) 841 if ((error = st_touch_tape(st)) != 0) 842 return (error); 843 /* 844 * Load the physical device parameters 845 * loads: blkmin, blkmax 846 */ 847 if ((error = st->ops(st, ST_OPS_RBL, 0)) != 0) 848 return (error); 849 /* 850 * Load the media dependent parameters 851 * includes: media_blksize,media_density,numblks 852 * As we have a tape in, it should be reflected here. 853 * If not you may need the "quirk" above. 854 */ 855 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 856 return (error); 857 /* 858 * If we have gained a permanent density from somewhere, 859 * then use it in preference to the one supplied by 860 * default by the driver. 861 */ 862 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 863 st->density = st->modes[dsty].density; 864 else 865 st->density = st->media_density; 866 /* 867 * If we have gained a permanent blocksize 868 * then use it in preference to the one supplied by 869 * default by the driver. 870 */ 871 st->flags &= ~ST_FIXEDBLOCKS; 872 if (st->modeflags[dsty] & 873 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 874 st->blksize = st->modes[dsty].blksize; 875 if (st->blksize) 876 st->flags |= ST_FIXEDBLOCKS; 877 } else { 878 if ((error = st_decide_mode(st, FALSE)) != 0) 879 return (error); 880 } 881 if ((error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 882 /* ATAPI will return ENODEV for this, and this may be OK */ 883 if (error != ENODEV) { 884 printf("%s: cannot set selected mode\n", 885 st->sc_dev.dv_xname); 886 return (error); 887 } 888 } 889 if (!(st->quirks & ST_Q_NOPREVENT)) { 890 scsipi_prevent(periph, PR_PREVENT, 891 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 892 } 893 st->flags &= ~ST_NEW_MOUNT; 894 st->flags |= ST_MOUNTED; 895 periph->periph_flags |= PERIPH_MEDIA_LOADED; /* move earlier? */ 896 897 return (0); 898 } 899 900 /* 901 * End the present mount session. 902 * Rewind, and optionally eject the tape. 903 * Reset various flags to indicate that all new 904 * operations require another mount operation 905 */ 906 void 907 st_unmount(st, eject) 908 struct st_softc *st; 909 boolean eject; 910 { 911 struct scsipi_periph *periph = st->sc_periph; 912 int nmarks; 913 914 if ((st->flags & ST_MOUNTED) == 0) 915 return; 916 SC_DEBUG(periph, SCSIPI_DB1, ("unmounting\n")); 917 st_check_eod(st, FALSE, &nmarks, XS_CTL_IGNORE_NOT_READY); 918 st_rewind(st, 0, XS_CTL_IGNORE_NOT_READY); 919 920 /* 921 * Section 9.3.3 of the SCSI specs states that a device shall return 922 * the density value specified in the last succesfull MODE SELECT 923 * after an unload operation, in case it is not able to 924 * automatically determine the density of the new medium. 925 * 926 * So we instruct the device to use the default density, which will 927 * prevent the use of stale density values (in particular, 928 * in st_touch_tape(). 929 */ 930 st->density = 0; 931 if (st->ops(st, ST_OPS_MODESELECT, 0) != 0) { 932 printf("%s: WARNING: cannot revert to default density\n", 933 st->sc_dev.dv_xname); 934 } 935 936 scsipi_prevent(periph, PR_ALLOW, 937 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 938 if (eject) 939 st_load(st, LD_UNLOAD, XS_CTL_IGNORE_NOT_READY); 940 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 941 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 942 } 943 944 /* 945 * Given all we know about the device, media, mode, 'quirks' and 946 * initial operation, make a decision as to how we should be set 947 * to run (regarding blocking and EOD marks) 948 */ 949 int 950 st_decide_mode(st, first_read) 951 struct st_softc *st; 952 boolean first_read; 953 { 954 955 SC_DEBUG(st->sc_periph, SCSIPI_DB2, ("starting block mode decision\n")); 956 957 /* 958 * If the drive can only handle fixed-length blocks and only at 959 * one size, perhaps we should just do that. 960 */ 961 if (st->blkmin && (st->blkmin == st->blkmax)) { 962 st->flags |= ST_FIXEDBLOCKS; 963 st->blksize = st->blkmin; 964 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 965 ("blkmin == blkmax of %d\n", st->blkmin)); 966 goto done; 967 } 968 /* 969 * If the tape density mandates (or even suggests) use of fixed 970 * or variable-length blocks, comply. 971 */ 972 switch (st->density) { 973 case HALFINCH_800: 974 case HALFINCH_1600: 975 case HALFINCH_6250: 976 case DDS: 977 st->flags &= ~ST_FIXEDBLOCKS; 978 st->blksize = 0; 979 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 980 ("density specified variable\n")); 981 goto done; 982 case QIC_11: 983 case QIC_24: 984 case QIC_120: 985 case QIC_150: 986 case QIC_525: 987 case QIC_1320: 988 case QIC_3095: 989 case QIC_3220: 990 st->flags |= ST_FIXEDBLOCKS; 991 if (st->media_blksize > 0) 992 st->blksize = st->media_blksize; 993 else 994 st->blksize = DEF_FIXED_BSIZE; 995 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 996 ("density specified fixed\n")); 997 goto done; 998 } 999 /* 1000 * If we're about to read the tape, perhaps we should choose 1001 * fixed or variable-length blocks and block size according to 1002 * what the drive found on the tape. 1003 */ 1004 if (first_read && 1005 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 1006 (st->media_blksize == DEF_FIXED_BSIZE) || 1007 (st->media_blksize == 1024))) { 1008 if (st->media_blksize > 0) 1009 st->flags |= ST_FIXEDBLOCKS; 1010 else 1011 st->flags &= ~ST_FIXEDBLOCKS; 1012 st->blksize = st->media_blksize; 1013 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1014 ("Used media_blksize of %d\n", st->media_blksize)); 1015 goto done; 1016 } 1017 /* 1018 * We're getting no hints from any direction. Choose variable- 1019 * length blocks arbitrarily. 1020 */ 1021 st->flags &= ~ST_FIXEDBLOCKS; 1022 st->blksize = 0; 1023 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1024 ("Give up and default to variable mode\n")); 1025 1026 done: 1027 /* 1028 * Decide whether or not to write two file marks to signify end- 1029 * of-data. Make the decision as a function of density. If 1030 * the decision is not to use a second file mark, the SCSI BLANK 1031 * CHECK condition code will be recognized as end-of-data when 1032 * first read. 1033 * (I think this should be a by-product of fixed/variable..julian) 1034 */ 1035 switch (st->density) { 1036 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 1037 case QIC_11: 1038 case QIC_24: 1039 case QIC_120: 1040 case QIC_150: 1041 case QIC_525: 1042 case QIC_1320: 1043 case QIC_3095: 1044 case QIC_3220: 1045 st->flags &= ~ST_2FM_AT_EOD; 1046 break; 1047 default: 1048 st->flags |= ST_2FM_AT_EOD; 1049 } 1050 return (0); 1051 } 1052 1053 /* 1054 * Actually translate the requested transfer into 1055 * one the physical driver can understand 1056 * The transfer is described by a buf and will include 1057 * only one physical transfer. 1058 */ 1059 void 1060 ststrategy(bp) 1061 struct buf *bp; 1062 { 1063 struct st_softc *st = st_cd.cd_devs[STUNIT(bp->b_dev)]; 1064 int s; 1065 1066 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1067 ("ststrategy %ld bytes @ blk %d\n", bp->b_bcount, bp->b_blkno)); 1068 /* 1069 * If it's a null transfer, return immediatly 1070 */ 1071 if (bp->b_bcount == 0) 1072 goto done; 1073 1074 /* If offset is negative, error */ 1075 if (bp->b_blkno < 0) { 1076 bp->b_error = EINVAL; 1077 goto bad; 1078 } 1079 1080 /* 1081 * Odd sized request on fixed drives are verboten 1082 */ 1083 if (st->flags & ST_FIXEDBLOCKS) { 1084 if (bp->b_bcount % st->blksize) { 1085 printf("%s: bad request, must be multiple of %d\n", 1086 st->sc_dev.dv_xname, st->blksize); 1087 bp->b_error = EIO; 1088 goto bad; 1089 } 1090 } 1091 /* 1092 * as are out-of-range requests on variable drives. 1093 */ 1094 else if (bp->b_bcount < st->blkmin || 1095 (st->blkmax && bp->b_bcount > st->blkmax)) { 1096 printf("%s: bad request, must be between %d and %d\n", 1097 st->sc_dev.dv_xname, st->blkmin, st->blkmax); 1098 bp->b_error = EIO; 1099 goto bad; 1100 } 1101 s = splbio(); 1102 1103 /* 1104 * Place it in the queue of activities for this tape 1105 * at the end (a bit silly because we only have on user.. 1106 * (but it could fork())) 1107 */ 1108 BUFQ_INSERT_TAIL(&st->buf_queue, bp); 1109 1110 /* 1111 * Tell the device to get going on the transfer if it's 1112 * not doing anything, otherwise just wait for completion 1113 * (All a bit silly if we're only allowing 1 open but..) 1114 */ 1115 ststart(st->sc_periph); 1116 1117 splx(s); 1118 return; 1119 bad: 1120 bp->b_flags |= B_ERROR; 1121 done: 1122 /* 1123 * Correctly set the buf to indicate a completed xfer 1124 */ 1125 bp->b_resid = bp->b_bcount; 1126 biodone(bp); 1127 return; 1128 } 1129 1130 /* 1131 * ststart looks to see if there is a buf waiting for the device 1132 * and that the device is not already busy. If both are true, 1133 * It dequeues the buf and creates a scsi command to perform the 1134 * transfer required. The transfer request will call scsipi_done 1135 * on completion, which will in turn call this routine again 1136 * so that the next queued transfer is performed. 1137 * The bufs are queued by the strategy routine (ststrategy) 1138 * 1139 * This routine is also called after other non-queued requests 1140 * have been made of the scsi driver, to ensure that the queue 1141 * continues to be drained. 1142 * ststart() is called at splbio 1143 */ 1144 void 1145 ststart(periph) 1146 struct scsipi_periph *periph; 1147 { 1148 struct st_softc *st = (void *)periph->periph_dev; 1149 struct buf *bp; 1150 struct scsi_rw_tape cmd; 1151 int flags, error; 1152 1153 SC_DEBUG(periph, SCSIPI_DB2, ("ststart ")); 1154 /* 1155 * See if there is a buf to do and we are not already 1156 * doing one 1157 */ 1158 while (periph->periph_active < periph->periph_openings) { 1159 /* if a special awaits, let it proceed first */ 1160 if (periph->periph_flags & PERIPH_WAITING) { 1161 periph->periph_flags &= ~PERIPH_WAITING; 1162 wakeup((caddr_t)periph); 1163 return; 1164 } 1165 1166 if ((bp = BUFQ_FIRST(&st->buf_queue)) == NULL) 1167 return; 1168 BUFQ_REMOVE(&st->buf_queue, bp); 1169 1170 /* 1171 * If the device has been unmounted by the user 1172 * then throw away all requests until done. 1173 */ 1174 if ((st->flags & ST_MOUNTED) == 0 || 1175 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 1176 /* make sure that one implies the other.. */ 1177 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 1178 bp->b_flags |= B_ERROR; 1179 bp->b_error = EIO; 1180 bp->b_resid = bp->b_bcount; 1181 biodone(bp); 1182 continue; 1183 } 1184 /* 1185 * only FIXEDBLOCK devices have pending I/O or space operations. 1186 */ 1187 if (st->flags & ST_FIXEDBLOCKS) { 1188 /* 1189 * If we are at a filemark but have not reported it yet 1190 * then we should report it now 1191 */ 1192 if (st->flags & ST_AT_FILEMARK) { 1193 if ((bp->b_flags & B_READ) == B_WRITE) { 1194 /* 1195 * Handling of ST_AT_FILEMARK in 1196 * st_space will fill in the right file 1197 * mark count. 1198 * Back up over filemark 1199 */ 1200 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1201 bp->b_flags |= B_ERROR; 1202 bp->b_error = EIO; 1203 biodone(bp); 1204 continue; 1205 } 1206 } else { 1207 bp->b_resid = bp->b_bcount; 1208 bp->b_error = 0; 1209 bp->b_flags &= ~B_ERROR; 1210 st->flags &= ~ST_AT_FILEMARK; 1211 biodone(bp); 1212 continue; /* seek more work */ 1213 } 1214 } 1215 } 1216 /* 1217 * If we are at EOM but have not reported it 1218 * yet then we should report it now. 1219 */ 1220 if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { 1221 bp->b_resid = bp->b_bcount; 1222 if (st->flags & ST_EIO_PENDING) { 1223 bp->b_error = EIO; 1224 bp->b_flags |= B_ERROR; 1225 } 1226 st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); 1227 biodone(bp); 1228 continue; /* seek more work */ 1229 } 1230 1231 /* 1232 * Fill out the scsi command 1233 */ 1234 memset(&cmd, 0, sizeof(cmd)); 1235 flags = XS_CTL_NOSLEEP | XS_CTL_ASYNC; 1236 if ((bp->b_flags & B_READ) == B_WRITE) { 1237 cmd.opcode = WRITE; 1238 st->flags &= ~ST_FM_WRITTEN; 1239 flags |= XS_CTL_DATA_OUT; 1240 } else { 1241 cmd.opcode = READ; 1242 flags |= XS_CTL_DATA_IN; 1243 } 1244 1245 /* 1246 * Handle "fixed-block-mode" tape drives by using the 1247 * block count instead of the length. 1248 */ 1249 if (st->flags & ST_FIXEDBLOCKS) { 1250 cmd.byte2 |= SRW_FIXED; 1251 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1252 } else 1253 _lto3b(bp->b_bcount, cmd.len); 1254 1255 /* 1256 * go ask the adapter to do all this for us 1257 */ 1258 error = scsipi_command(periph, 1259 (struct scsipi_generic *)&cmd, sizeof(cmd), 1260 (u_char *)bp->b_data, bp->b_bcount, 1261 0, ST_IO_TIME, bp, flags); 1262 if (error) { 1263 printf("%s: not queued, error %d\n", 1264 st->sc_dev.dv_xname, error); 1265 } 1266 } /* go back and see if we can cram more work in.. */ 1267 } 1268 1269 void 1270 stdone(xs) 1271 struct scsipi_xfer *xs; 1272 { 1273 struct st_softc *st = (void *)xs->xs_periph->periph_dev; 1274 1275 if (xs->bp != NULL) { 1276 if ((xs->bp->b_flags & B_READ) == B_WRITE) { 1277 st->flags |= ST_WRITTEN; 1278 } else { 1279 st->flags &= ~ST_WRITTEN; 1280 } 1281 #if NRND > 0 1282 rnd_add_uint32(&st->rnd_source, xs->bp->b_blkno); 1283 #endif 1284 } 1285 } 1286 1287 int 1288 stread(dev, uio, iomode) 1289 dev_t dev; 1290 struct uio *uio; 1291 int iomode; 1292 { 1293 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1294 1295 return (physio(ststrategy, NULL, dev, B_READ, 1296 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1297 } 1298 1299 int 1300 stwrite(dev, uio, iomode) 1301 dev_t dev; 1302 struct uio *uio; 1303 int iomode; 1304 { 1305 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1306 1307 return (physio(ststrategy, NULL, dev, B_WRITE, 1308 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1309 } 1310 1311 /* 1312 * Perform special action on behalf of the user; 1313 * knows about the internals of this device 1314 */ 1315 int 1316 stioctl(dev, cmd, arg, flag, p) 1317 dev_t dev; 1318 u_long cmd; 1319 caddr_t arg; 1320 int flag; 1321 struct proc *p; 1322 { 1323 int error = 0; 1324 int unit; 1325 int number, nmarks, dsty; 1326 int flags; 1327 struct st_softc *st; 1328 int hold_blksize; 1329 u_int8_t hold_density; 1330 struct mtop *mt = (struct mtop *) arg; 1331 1332 /* 1333 * Find the device that the user is talking about 1334 */ 1335 flags = 0; /* give error messages, act on errors etc. */ 1336 unit = STUNIT(dev); 1337 dsty = STDSTY(dev); 1338 st = st_cd.cd_devs[unit]; 1339 hold_blksize = st->blksize; 1340 hold_density = st->density; 1341 1342 switch ((u_int) cmd) { 1343 1344 case MTIOCGET: { 1345 struct mtget *g = (struct mtget *) arg; 1346 /* 1347 * (to get the current state of READONLY) 1348 */ 1349 error = st->ops(st, ST_OPS_MODESENSE, XS_CTL_SILENT); 1350 if (error) { 1351 /* 1352 * Ignore the error if in control mode; 1353 * this is mandated by st(4). 1354 */ 1355 if (STMODE(dev) != CTRL_MODE) 1356 break; 1357 error = 0; 1358 } 1359 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("[ioctl: get status]\n")); 1360 memset(g, 0, sizeof(struct mtget)); 1361 g->mt_type = 0x7; /* Ultrix compat *//*? */ 1362 g->mt_blksiz = st->blksize; 1363 g->mt_density = st->density; 1364 g->mt_mblksiz[0] = st->modes[0].blksize; 1365 g->mt_mblksiz[1] = st->modes[1].blksize; 1366 g->mt_mblksiz[2] = st->modes[2].blksize; 1367 g->mt_mblksiz[3] = st->modes[3].blksize; 1368 g->mt_mdensity[0] = st->modes[0].density; 1369 g->mt_mdensity[1] = st->modes[1].density; 1370 g->mt_mdensity[2] = st->modes[2].density; 1371 g->mt_mdensity[3] = st->modes[3].density; 1372 if (st->flags & ST_READONLY) 1373 g->mt_dsreg |= MT_DS_RDONLY; 1374 if (st->flags & ST_MOUNTED) 1375 g->mt_dsreg |= MT_DS_MOUNTED; 1376 g->mt_resid = st->mt_resid; 1377 g->mt_erreg = st->mt_erreg; 1378 /* 1379 * clear latched errors. 1380 */ 1381 st->mt_resid = 0; 1382 st->mt_erreg = 0; 1383 st->asc = 0; 1384 st->ascq = 0; 1385 break; 1386 } 1387 case MTIOCTOP: { 1388 1389 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1390 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1391 mt->mt_count)); 1392 1393 /* compat: in U*x it is a short */ 1394 number = mt->mt_count; 1395 switch ((short) (mt->mt_op)) { 1396 case MTWEOF: /* write an end-of-file record */ 1397 error = st_write_filemarks(st, number, flags); 1398 break; 1399 case MTBSF: /* backward space file */ 1400 number = -number; 1401 case MTFSF: /* forward space file */ 1402 error = st_check_eod(st, FALSE, &nmarks, flags); 1403 if (!error) 1404 error = st_space(st, number - nmarks, 1405 SP_FILEMARKS, flags); 1406 break; 1407 case MTBSR: /* backward space record */ 1408 number = -number; 1409 case MTFSR: /* forward space record */ 1410 error = st_check_eod(st, TRUE, &nmarks, flags); 1411 if (!error) 1412 error = st_space(st, number, SP_BLKS, flags); 1413 break; 1414 case MTREW: /* rewind */ 1415 error = st_rewind(st, 0, flags); 1416 break; 1417 case MTOFFL: /* rewind and put the drive offline */ 1418 st_unmount(st, EJECT); 1419 break; 1420 case MTNOP: /* no operation, sets status only */ 1421 break; 1422 case MTRETEN: /* retension the tape */ 1423 error = st_load(st, LD_RETENSION, flags); 1424 if (!error) 1425 error = st_load(st, LD_LOAD, flags); 1426 break; 1427 case MTEOM: /* forward space to end of media */ 1428 error = st_check_eod(st, FALSE, &nmarks, flags); 1429 if (!error) 1430 error = st_space(st, 1, SP_EOM, flags); 1431 break; 1432 case MTCACHE: /* enable controller cache */ 1433 st->flags &= ~ST_DONTBUFFER; 1434 goto try_new_value; 1435 case MTNOCACHE: /* disable controller cache */ 1436 st->flags |= ST_DONTBUFFER; 1437 goto try_new_value; 1438 case MTERASE: /* erase volume */ 1439 error = st_erase(st, number, flags); 1440 break; 1441 case MTSETBSIZ: /* Set block size for device */ 1442 #ifdef NOTYET 1443 if (!(st->flags & ST_NEW_MOUNT)) { 1444 uprintf("re-mount tape before changing blocksize"); 1445 error = EINVAL; 1446 break; 1447 } 1448 #endif 1449 if (number == 0) 1450 st->flags &= ~ST_FIXEDBLOCKS; 1451 else { 1452 if ((st->blkmin || st->blkmax) && 1453 (number < st->blkmin || 1454 number > st->blkmax)) { 1455 error = EINVAL; 1456 break; 1457 } 1458 st->flags |= ST_FIXEDBLOCKS; 1459 } 1460 st->blksize = number; 1461 st->flags |= ST_BLOCK_SET; /*XXX */ 1462 goto try_new_value; 1463 1464 case MTSETDNSTY: /* Set density for device and mode */ 1465 /* 1466 * Any number >= 0 and <= 0xff is legal. Numbers 1467 * above 0x80 are 'vendor unique'. 1468 */ 1469 if (number < 0 || number > 255) { 1470 error = EINVAL; 1471 break; 1472 } else 1473 st->density = number; 1474 goto try_new_value; 1475 1476 case MTCMPRESS: 1477 error = st->ops(st, (number == 0) ? 1478 ST_OPS_CMPRSS_OFF : ST_OPS_CMPRSS_ON, 1479 XS_CTL_SILENT); 1480 break; 1481 1482 case MTEWARN: 1483 if (number) 1484 st->flags |= ST_EARLYWARN; 1485 else 1486 st->flags &= ~ST_EARLYWARN; 1487 break; 1488 1489 default: 1490 error = EINVAL; 1491 } 1492 break; 1493 } 1494 case MTIOCIEOT: 1495 case MTIOCEEOT: 1496 break; 1497 1498 case MTIOCRDSPOS: 1499 error = st_rdpos(st, 0, (u_int32_t *) arg); 1500 break; 1501 1502 case MTIOCRDHPOS: 1503 error = st_rdpos(st, 1, (u_int32_t *) arg); 1504 break; 1505 1506 case MTIOCSLOCATE: 1507 error = st_setpos(st, 0, (u_int32_t *) arg); 1508 break; 1509 1510 case MTIOCHLOCATE: 1511 error = st_setpos(st, 1, (u_int32_t *) arg); 1512 break; 1513 1514 1515 default: 1516 error = scsipi_do_ioctl(st->sc_periph, dev, cmd, arg, 1517 flag, p); 1518 break; 1519 } 1520 return (error); 1521 /*-----------------------------*/ 1522 try_new_value: 1523 /* 1524 * Check that the mode being asked for is aggreeable to the 1525 * drive. If not, put it back the way it was. 1526 * 1527 * If in control mode, we can make (persistent) mode changes 1528 * even if no medium is loaded (see st(4)). 1529 */ 1530 if ((STMODE(dev) != CTRL_MODE || (st->flags & ST_MOUNTED) != 0) && 1531 (error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 1532 /* put it back as it was */ 1533 printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); 1534 st->density = hold_density; 1535 st->blksize = hold_blksize; 1536 if (st->blksize) 1537 st->flags |= ST_FIXEDBLOCKS; 1538 else 1539 st->flags &= ~ST_FIXEDBLOCKS; 1540 return (error); 1541 } 1542 /* 1543 * As the drive liked it, if we are setting a new default, 1544 * set it into the structures as such. 1545 * 1546 * The means for deciding this are not finalised yet- but 1547 * if the device was opened in Control Mode, the values 1548 * are persistent now across mounts. 1549 */ 1550 if (STMODE(dev) == CTRL_MODE) { 1551 switch ((short) (mt->mt_op)) { 1552 case MTSETBSIZ: 1553 st->modes[dsty].blksize = st->blksize; 1554 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1555 break; 1556 case MTSETDNSTY: 1557 st->modes[dsty].density = st->density; 1558 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1559 break; 1560 } 1561 } 1562 return (0); 1563 } 1564 1565 /* 1566 * Do a synchronous read. 1567 */ 1568 int 1569 st_read(st, buf, size, flags) 1570 struct st_softc *st; 1571 int size; 1572 int flags; 1573 char *buf; 1574 { 1575 struct scsi_rw_tape cmd; 1576 1577 /* 1578 * If it's a null transfer, return immediatly 1579 */ 1580 if (size == 0) 1581 return (0); 1582 memset(&cmd, 0, sizeof(cmd)); 1583 cmd.opcode = READ; 1584 if (st->flags & ST_FIXEDBLOCKS) { 1585 cmd.byte2 |= SRW_FIXED; 1586 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1587 cmd.len); 1588 } else 1589 _lto3b(size, cmd.len); 1590 return (scsipi_command(st->sc_periph, 1591 (struct scsipi_generic *)&cmd, sizeof(cmd), 1592 (u_char *)buf, size, 0, ST_IO_TIME, NULL, flags | XS_CTL_DATA_IN)); 1593 } 1594 1595 /* 1596 * issue an erase command 1597 */ 1598 int 1599 st_erase(st, full, flags) 1600 struct st_softc *st; 1601 int full, flags; 1602 { 1603 int tmo; 1604 struct scsi_erase cmd; 1605 1606 /* 1607 * Full erase means set LONG bit in erase command, which asks 1608 * the drive to erase the entire unit. Without this bit, we're 1609 * asking the drive to write an erase gap. 1610 */ 1611 memset(&cmd, 0, sizeof(cmd)); 1612 cmd.opcode = ERASE; 1613 if (full) { 1614 cmd.byte2 = SE_LONG; 1615 tmo = ST_SPC_TIME; 1616 } else { 1617 tmo = ST_IO_TIME; 1618 } 1619 1620 /* 1621 * XXX We always do this asynchronously, for now, unless the device 1622 * has the ST_Q_ERASE_NOIMM quirk. How long should we wait if we 1623 * want to (eventually) to it synchronously? 1624 */ 1625 if ((st->quirks & ST_Q_ERASE_NOIMM) == 0) 1626 cmd.byte2 |= SE_IMMED; 1627 1628 return (scsipi_command(st->sc_periph, 1629 (struct scsipi_generic *)&cmd, sizeof(cmd), 1630 0, 0, ST_RETRIES, tmo, NULL, flags)); 1631 } 1632 1633 /* 1634 * skip N blocks/filemarks/seq filemarks/eom 1635 */ 1636 int 1637 st_space(st, number, what, flags) 1638 struct st_softc *st; 1639 u_int what; 1640 int flags; 1641 int number; 1642 { 1643 struct scsi_space cmd; 1644 int error; 1645 1646 switch (what) { 1647 case SP_BLKS: 1648 if (st->flags & ST_PER_ACTION) { 1649 if (number > 0) { 1650 st->flags &= ~ST_PER_ACTION; 1651 return (EIO); 1652 } else if (number < 0) { 1653 if (st->flags & ST_AT_FILEMARK) { 1654 /* 1655 * Handling of ST_AT_FILEMARK 1656 * in st_space will fill in the 1657 * right file mark count. 1658 */ 1659 error = st_space(st, 0, SP_FILEMARKS, 1660 flags); 1661 if (error) 1662 return (error); 1663 } 1664 if (st->flags & ST_BLANK_READ) { 1665 st->flags &= ~ST_BLANK_READ; 1666 return (EIO); 1667 } 1668 st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); 1669 } 1670 } 1671 break; 1672 case SP_FILEMARKS: 1673 if (st->flags & ST_EIO_PENDING) { 1674 if (number > 0) { 1675 /* pretend we just discovered the error */ 1676 st->flags &= ~ST_EIO_PENDING; 1677 return (EIO); 1678 } else if (number < 0) { 1679 /* back away from the error */ 1680 st->flags &= ~ST_EIO_PENDING; 1681 } 1682 } 1683 if (st->flags & ST_AT_FILEMARK) { 1684 st->flags &= ~ST_AT_FILEMARK; 1685 number--; 1686 } 1687 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 1688 /* back away from unwritten tape */ 1689 st->flags &= ~ST_BLANK_READ; 1690 number++; /* XXX dubious */ 1691 } 1692 break; 1693 case SP_EOM: 1694 if (st->flags & ST_EOM_PENDING) { 1695 /* we're already there */ 1696 st->flags &= ~ST_EOM_PENDING; 1697 return (0); 1698 } 1699 if (st->flags & ST_EIO_PENDING) { 1700 /* pretend we just discovered the error */ 1701 st->flags &= ~ST_EIO_PENDING; 1702 return (EIO); 1703 } 1704 if (st->flags & ST_AT_FILEMARK) 1705 st->flags &= ~ST_AT_FILEMARK; 1706 break; 1707 } 1708 if (number == 0) 1709 return (0); 1710 1711 memset(&cmd, 0, sizeof(cmd)); 1712 cmd.opcode = SPACE; 1713 cmd.byte2 = what; 1714 _lto3b(number, cmd.number); 1715 1716 return (scsipi_command(st->sc_periph, 1717 (struct scsipi_generic *)&cmd, sizeof(cmd), 1718 0, 0, 0, ST_SPC_TIME, NULL, flags)); 1719 } 1720 1721 /* 1722 * write N filemarks 1723 */ 1724 int 1725 st_write_filemarks(st, number, flags) 1726 struct st_softc *st; 1727 int flags; 1728 int number; 1729 { 1730 struct scsi_write_filemarks cmd; 1731 1732 /* 1733 * It's hard to write a negative number of file marks. 1734 * Don't try. 1735 */ 1736 if (number < 0) 1737 return (EINVAL); 1738 switch (number) { 1739 case 0: /* really a command to sync the drive's buffers */ 1740 break; 1741 case 1: 1742 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 1743 st->flags &= ~ST_WRITTEN; 1744 else 1745 st->flags |= ST_FM_WRITTEN; 1746 st->flags &= ~ST_PER_ACTION; 1747 break; 1748 default: 1749 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 1750 } 1751 1752 memset(&cmd, 0, sizeof(cmd)); 1753 cmd.opcode = WRITE_FILEMARKS; 1754 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1755 cmd.byte2 = SR_IMMED; 1756 /* 1757 * The ATAPI Onstream DI-30 doesn't support writing filemarks, but 1758 * WRITE_FILEMARKS is still used to flush the buffer 1759 */ 1760 if ((st->quirks & ST_Q_NOFILEMARKS) == 0) 1761 _lto3b(number, cmd.number); 1762 1763 return (scsipi_command(st->sc_periph, 1764 (struct scsipi_generic *)&cmd, sizeof(cmd), 1765 0, 0, 0, ST_IO_TIME * 4, NULL, flags)); 1766 } 1767 1768 /* 1769 * Make sure the right number of file marks is on tape if the 1770 * tape has been written. If the position argument is true, 1771 * leave the tape positioned where it was originally. 1772 * 1773 * nmarks returns the number of marks to skip (or, if position 1774 * true, which were skipped) to get back original position. 1775 */ 1776 int 1777 st_check_eod(st, position, nmarks, flags) 1778 struct st_softc *st; 1779 boolean position; 1780 int *nmarks; 1781 int flags; 1782 { 1783 int error; 1784 1785 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 1786 default: 1787 *nmarks = 0; 1788 return (0); 1789 case ST_WRITTEN: 1790 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 1791 *nmarks = 1; 1792 break; 1793 case ST_WRITTEN | ST_2FM_AT_EOD: 1794 *nmarks = 2; 1795 } 1796 error = st_write_filemarks(st, *nmarks, flags); 1797 if (position && !error) 1798 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 1799 return (error); 1800 } 1801 1802 /* 1803 * load/unload/retension 1804 */ 1805 int 1806 st_load(st, type, flags) 1807 struct st_softc *st; 1808 u_int type; 1809 int flags; 1810 { 1811 int error; 1812 struct scsi_load cmd; 1813 1814 if (type != LD_LOAD) { 1815 int nmarks; 1816 1817 error = st_check_eod(st, FALSE, &nmarks, flags); 1818 if (error) { 1819 printf("%s: failed to write closing filemarks at " 1820 "unload, errno=%d\n", st->sc_dev.dv_xname, error); 1821 return (error); 1822 } 1823 } 1824 if (st->quirks & ST_Q_IGNORE_LOADS) { 1825 if (type == LD_LOAD) { 1826 /* 1827 * If we ignore loads, at least we should try a rewind. 1828 */ 1829 return st_rewind(st, 0, flags); 1830 } 1831 /* otherwise, we should do what's asked of us */ 1832 } 1833 1834 memset(&cmd, 0, sizeof(cmd)); 1835 cmd.opcode = LOAD; 1836 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1837 cmd.byte2 = SR_IMMED; 1838 cmd.how = type; 1839 1840 error = scsipi_command(st->sc_periph, 1841 (struct scsipi_generic *)&cmd, sizeof(cmd), 1842 0, 0, ST_RETRIES, ST_SPC_TIME, NULL, flags); 1843 if (error) { 1844 printf("%s: error %d in st_load (op %d)\n", 1845 st->sc_dev.dv_xname, error, type); 1846 } 1847 return (error); 1848 } 1849 1850 /* 1851 * Rewind the device 1852 */ 1853 int 1854 st_rewind(st, immediate, flags) 1855 struct st_softc *st; 1856 u_int immediate; 1857 int flags; 1858 { 1859 struct scsi_rewind cmd; 1860 int error; 1861 int nmarks; 1862 1863 error = st_check_eod(st, FALSE, &nmarks, flags); 1864 if (error) { 1865 printf("%s: failed to write closing filemarks at " 1866 "rewind, errno=%d\n", st->sc_dev.dv_xname, error); 1867 return (error); 1868 } 1869 st->flags &= ~ST_PER_ACTION; 1870 1871 /* 1872 * ATAPI tapes always need immediate to be set 1873 */ 1874 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1875 immediate = SR_IMMED; 1876 1877 memset(&cmd, 0, sizeof(cmd)); 1878 cmd.opcode = REWIND; 1879 cmd.byte2 = immediate; 1880 1881 error = scsipi_command(st->sc_periph, 1882 (struct scsipi_generic *)&cmd, sizeof(cmd), 0, 0, ST_RETRIES, 1883 immediate ? ST_CTL_TIME: ST_SPC_TIME, NULL, flags); 1884 if (error) { 1885 printf("%s: error %d trying to rewind\n", 1886 st->sc_dev.dv_xname, error); 1887 } 1888 return (error); 1889 } 1890 1891 int 1892 st_rdpos(st, hard, blkptr) 1893 struct st_softc *st; 1894 int hard; 1895 u_int32_t *blkptr; 1896 { 1897 int error; 1898 u_int8_t posdata[20]; 1899 struct scsi_tape_read_position cmd; 1900 1901 /* 1902 * First flush any pending writes... 1903 */ 1904 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 1905 1906 /* 1907 * The latter case is for 'write protected' tapes 1908 * which are too stupid to recognize a zero count 1909 * for writing filemarks as a no-op. 1910 */ 1911 if (error != 0 && error != EACCES && error != EROFS) 1912 return (error); 1913 1914 memset(&cmd, 0, sizeof(cmd)); 1915 memset(&posdata, 0, sizeof(posdata)); 1916 cmd.opcode = READ_POSITION; 1917 if (hard) 1918 cmd.byte1 = 1; 1919 1920 error = scsipi_command(st->sc_periph, 1921 (struct scsipi_generic *)&cmd, sizeof(cmd), (u_char *)&posdata, 1922 sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, 1923 XS_CTL_SILENT | XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); 1924 1925 if (error == 0) { 1926 #if 0 1927 printf("posdata:"); 1928 for (hard = 0; hard < sizeof(posdata); hard++) 1929 printf("%02x ", posdata[hard] & 0xff); 1930 printf("\n"); 1931 #endif 1932 if (posdata[0] & 0x4) /* Block Position Unknown */ 1933 error = EINVAL; 1934 else 1935 *blkptr = _4btol(&posdata[4]); 1936 } 1937 return (error); 1938 } 1939 1940 int 1941 st_setpos(st, hard, blkptr) 1942 struct st_softc *st; 1943 int hard; 1944 u_int32_t *blkptr; 1945 { 1946 int error; 1947 struct scsi_tape_locate cmd; 1948 1949 /* 1950 * First flush any pending writes. Strictly speaking, 1951 * we're not supposed to have to worry about this, 1952 * but let's be untrusting. 1953 */ 1954 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 1955 1956 /* 1957 * The latter case is for 'write protected' tapes 1958 * which are too stupid to recognize a zero count 1959 * for writing filemarks as a no-op. 1960 */ 1961 if (error != 0 && error != EACCES && error != EROFS) 1962 return (error); 1963 1964 memset(&cmd, 0, sizeof(cmd)); 1965 cmd.opcode = LOCATE; 1966 if (hard) 1967 cmd.byte2 = 1 << 2; 1968 _lto4b(*blkptr, cmd.blkaddr); 1969 error = scsipi_command(st->sc_periph, 1970 (struct scsipi_generic *)&cmd, sizeof(cmd), 1971 NULL, 0, ST_RETRIES, ST_SPC_TIME, NULL, 0); 1972 /* 1973 * XXX: Note file && block number position now unknown (if 1974 * XXX: these things ever start being maintained in this driver) 1975 */ 1976 return (error); 1977 } 1978 1979 1980 /* 1981 * Look at the returned sense and act on the error and determine 1982 * the unix error number to pass back..., 0 (== report no error), 1983 * -1 = retry the operation, -2 continue error processing. 1984 */ 1985 int 1986 st_interpret_sense(xs) 1987 struct scsipi_xfer *xs; 1988 { 1989 struct scsipi_periph *periph = xs->xs_periph; 1990 struct scsipi_sense_data *sense = &xs->sense.scsi_sense; 1991 struct buf *bp = xs->bp; 1992 struct st_softc *st = (void *)periph->periph_dev; 1993 int retval = EJUSTRETURN; 1994 int doprint = ((xs->xs_control & XS_CTL_SILENT) == 0); 1995 u_int8_t key; 1996 int32_t info; 1997 1998 /* 1999 * If it isn't a extended or extended/deferred error, let 2000 * the generic code handle it. 2001 */ 2002 if ((sense->error_code & SSD_ERRCODE) != 0x70 && 2003 (sense->error_code & SSD_ERRCODE) != 0x71) { /* DEFFERRED */ 2004 return (retval); 2005 } 2006 2007 if (sense->error_code & SSD_ERRCODE_VALID) 2008 info = _4btol(sense->info); 2009 else 2010 info = (st->flags & ST_FIXEDBLOCKS) ? 2011 xs->datalen / st->blksize : xs->datalen; 2012 key = sense->flags & SSD_KEY; 2013 st->mt_erreg = key; 2014 st->asc = sense->add_sense_code; 2015 st->ascq = sense->add_sense_code_qual; 2016 st->mt_resid = (short) info; 2017 2018 if (key == SKEY_NOT_READY && st->asc == 0x4 && st->ascq == 0x1) { 2019 /* Not Ready, Logical Unit Is in Process Of Becoming Ready */ 2020 scsipi_periph_freeze(periph, 1); 2021 callout_reset(&periph->periph_callout, 2022 hz, scsipi_periph_timed_thaw, periph); 2023 return (ERESTART); 2024 } 2025 2026 /* 2027 * If the device is not open yet, let generic handle 2028 */ 2029 if ((periph->periph_flags & PERIPH_OPEN) == 0) { 2030 return (retval); 2031 } 2032 2033 2034 if (st->flags & ST_FIXEDBLOCKS) { 2035 xs->resid = info * st->blksize; 2036 if (sense->flags & SSD_EOM) { 2037 if ((st->flags & ST_EARLYWARN) == 0) 2038 st->flags |= ST_EIO_PENDING; 2039 st->flags |= ST_EOM_PENDING; 2040 if (bp) 2041 bp->b_resid = xs->resid; 2042 } 2043 if (sense->flags & SSD_FILEMARK) { 2044 st->flags |= ST_AT_FILEMARK; 2045 if (bp) 2046 bp->b_resid = xs->resid; 2047 } 2048 if (sense->flags & SSD_ILI) { 2049 st->flags |= ST_EIO_PENDING; 2050 if (bp) 2051 bp->b_resid = xs->resid; 2052 if (sense->error_code & SSD_ERRCODE_VALID && 2053 (xs->xs_control & XS_CTL_SILENT) == 0) 2054 printf("%s: block wrong size, %d blocks " 2055 "residual\n", st->sc_dev.dv_xname, info); 2056 2057 /* 2058 * This quirk code helps the drive read 2059 * the first tape block, regardless of 2060 * format. That is required for these 2061 * drives to return proper MODE SENSE 2062 * information. 2063 */ 2064 if ((st->quirks & ST_Q_SENSE_HELP) && 2065 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 2066 st->blksize -= 512; 2067 } 2068 /* 2069 * If data wanted and no data was transferred, do it immediately 2070 */ 2071 if (xs->datalen && xs->resid >= xs->datalen) { 2072 if (st->flags & ST_EIO_PENDING) 2073 return (EIO); 2074 if (st->flags & ST_AT_FILEMARK) { 2075 if (bp) 2076 bp->b_resid = xs->resid; 2077 return (0); 2078 } 2079 } 2080 } else { /* must be variable mode */ 2081 if (sense->flags & SSD_EOM) { 2082 /* 2083 * The current semantics of this 2084 * driver requires EOM detection 2085 * to return EIO unless early 2086 * warning detection is enabled 2087 * for variable mode (this is always 2088 * on for fixed block mode). 2089 */ 2090 if (st->flags & ST_EARLYWARN) { 2091 st->flags |= ST_EOM_PENDING; 2092 retval = 0; 2093 } else { 2094 retval = EIO; 2095 } 2096 2097 /* 2098 * If it's an unadorned EOM detection, 2099 * suppress printing an error. 2100 */ 2101 if (key == SKEY_NO_SENSE) { 2102 doprint = 0; 2103 } 2104 } else if (sense->flags & SSD_FILEMARK) { 2105 retval = 0; 2106 } else if (sense->flags & SSD_ILI) { 2107 if (info < 0) { 2108 /* 2109 * The tape record was bigger than the read 2110 * we issued. 2111 */ 2112 if ((xs->xs_control & XS_CTL_SILENT) == 0) { 2113 printf("%s: %d-byte tape record too big" 2114 " for %d-byte user buffer\n", 2115 st->sc_dev.dv_xname, 2116 xs->datalen - info, xs->datalen); 2117 } 2118 retval = EIO; 2119 } else { 2120 retval = 0; 2121 } 2122 } 2123 xs->resid = info; 2124 if (bp) 2125 bp->b_resid = info; 2126 } 2127 2128 #ifndef SCSIPI_DEBUG 2129 if (retval == 0 && key == SKEY_NO_SENSE) 2130 doprint = 0; 2131 #endif 2132 if (key == SKEY_BLANK_CHECK) { 2133 /* 2134 * This quirk code helps the drive read the 2135 * first tape block, regardless of format. That 2136 * is required for these drives to return proper 2137 * MODE SENSE information. 2138 */ 2139 if ((st->quirks & ST_Q_SENSE_HELP) && 2140 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 2141 /* still starting */ 2142 st->blksize -= 512; 2143 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 2144 st->flags |= ST_BLANK_READ; 2145 xs->resid = xs->datalen; 2146 if (bp) { 2147 bp->b_resid = xs->resid; 2148 /* return an EOF */ 2149 } 2150 retval = 0; 2151 } 2152 } 2153 2154 /* 2155 * If generic sense processing will continue, we should not 2156 * print sense info here. 2157 */ 2158 if (retval == EJUSTRETURN) 2159 doprint = 0; 2160 2161 if (doprint) { 2162 #ifdef SCSIVERBOSE 2163 scsipi_print_sense(xs, 0); 2164 #else 2165 scsipi_printaddr(periph); 2166 printf("Sense Key 0x%02x", key); 2167 if ((sense->error_code & SSD_ERRCODE_VALID) != 0) { 2168 switch (key) { 2169 case SKEY_NOT_READY: 2170 case SKEY_ILLEGAL_REQUEST: 2171 case SKEY_UNIT_ATTENTION: 2172 case SKEY_WRITE_PROTECT: 2173 break; 2174 case SKEY_BLANK_CHECK: 2175 printf(", requested size: %d (decimal)", info); 2176 break; 2177 case SKEY_ABORTED_COMMAND: 2178 if (xs->xs_retries) 2179 printf(", retrying"); 2180 printf(", cmd 0x%x, info 0x%x", 2181 xs->cmd->opcode, info); 2182 break; 2183 default: 2184 printf(", info = %d (decimal)", info); 2185 } 2186 } 2187 if (sense->extra_len != 0) { 2188 int n; 2189 printf(", data ="); 2190 for (n = 0; n < sense->extra_len; n++) 2191 printf(" %02x", sense->cmd_spec_info[n]); 2192 } 2193 printf("\n"); 2194 #endif 2195 } 2196 return (retval); 2197 } 2198 2199 /* 2200 * The quirk here is that the drive returns some value to st_mode_sense 2201 * incorrectly until the tape has actually passed by the head. 2202 * 2203 * The method is to set the drive to large fixed-block state (user-specified 2204 * density and 1024-byte blocks), then read and rewind to get it to sense the 2205 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 2206 * work, as a last resort, try variable- length blocks. The result will be 2207 * the ability to do an accurate st_mode_sense. 2208 * 2209 * We know we can do a rewind because we just did a load, which implies rewind. 2210 * Rewind seems preferable to space backward if we have a virgin tape. 2211 * 2212 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 2213 * error processing, both part of st_interpret_sense. 2214 */ 2215 int 2216 st_touch_tape(st) 2217 struct st_softc *st; 2218 { 2219 char *buf; 2220 int readsize; 2221 int error; 2222 2223 buf = malloc(1024, M_TEMP, M_NOWAIT); 2224 if (buf == NULL) 2225 return (ENOMEM); 2226 2227 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 2228 goto bad; 2229 2230 /* 2231 * If the block size is already known from the 2232 * sense data, use it. Else start probing at 1024. 2233 */ 2234 if (st->media_blksize > 0) 2235 st->blksize = st->media_blksize; 2236 else 2237 st->blksize = 1024; 2238 2239 do { 2240 switch (st->blksize) { 2241 case 512: 2242 case 1024: 2243 readsize = st->blksize; 2244 st->flags |= ST_FIXEDBLOCKS; 2245 break; 2246 default: 2247 readsize = 1; 2248 st->flags &= ~ST_FIXEDBLOCKS; 2249 } 2250 if ((error = st->ops(st, ST_OPS_MODESELECT, XS_CTL_SILENT)) 2251 != 0) { 2252 /* 2253 * The device did not agree with the proposed 2254 * block size. If we exhausted our options, 2255 * return failure, else try another. 2256 */ 2257 if (readsize == 1) 2258 goto bad; 2259 st->blksize -= 512; 2260 continue; 2261 } 2262 st_read(st, buf, readsize, XS_CTL_SILENT); /* XXX */ 2263 if ((error = st_rewind(st, 0, 0)) != 0) { 2264 bad: free(buf, M_TEMP); 2265 return (error); 2266 } 2267 } while (readsize != 1 && readsize > st->blksize); 2268 2269 free(buf, M_TEMP); 2270 return (0); 2271 } 2272 2273 int 2274 stdump(dev, blkno, va, size) 2275 dev_t dev; 2276 daddr_t blkno; 2277 caddr_t va; 2278 size_t size; 2279 { 2280 2281 /* Not implemented. */ 2282 return (ENXIO); 2283 } 2284
Indexes created Sun Sep 21 20:09:37 GMT 2025