st.c revision 1.150
1 /* $NetBSD: st.c,v 1.150 2002/03/20 14:53:59 christos 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 1.150 2002/03/20 14:53:59 christos 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 if (!(st->quirks & ST_Q_NOPREVENT)) { 693 scsipi_prevent(periph, PR_PREVENT, 694 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 695 } 696 697 SC_DEBUG(periph, SCSIPI_DB2, ("open complete\n")); 698 return (0); 699 700 bad: 701 st_unmount(st, NOEJECT); 702 scsipi_adapter_delref(adapt); 703 periph->periph_flags &= ~PERIPH_OPEN; 704 return (error); 705 } 706 707 /* 708 * close the device.. only called if we are the LAST 709 * occurence of an open device 710 */ 711 int 712 stclose(dev, flags, mode, p) 713 dev_t dev; 714 int flags; 715 int mode; 716 struct proc *p; 717 { 718 int stxx, error = 0; 719 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 720 struct scsipi_periph *periph = st->sc_periph; 721 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 722 723 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("closing\n")); 724 725 /* 726 * Make sure that a tape opened in write-only mode will have 727 * file marks written on it when closed, even if not written to. 728 * 729 * This is for SUN compatibility. Actually, the Sun way of 730 * things is to: 731 * 732 * only write filemarks if there are fmks to be written and 733 * - open for write (possibly read/write) 734 * - the last operation was a write 735 * or: 736 * - opened for wronly 737 * - no data was written (including filemarks) 738 */ 739 740 stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); 741 if (((flags & FWRITE) && stxx == ST_WRITTEN) || 742 ((flags & O_ACCMODE) == FWRITE && stxx == 0)) { 743 int nm; 744 error = st_check_eod(st, FALSE, &nm, 0); 745 } 746 747 /* 748 * Allow robots to eject tape if needed. 749 */ 750 scsipi_prevent(periph, PR_ALLOW, 751 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 752 753 switch (STMODE(dev)) { 754 case NORMAL_MODE: 755 st_unmount(st, NOEJECT); 756 break; 757 case NOREW_MODE: 758 case CTRL_MODE: 759 /* 760 * Leave mounted unless media seems to have been removed. 761 * 762 * Otherwise, if we're to terminate a tape with more than one 763 * filemark [ and because we're not rewinding here ], backspace 764 * one filemark so that later appends will see an unbroken 765 * sequence of: 766 * 767 * file - FMK - file - FMK ... file - FMK FMK (EOM) 768 */ 769 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 770 st_unmount(st, NOEJECT); 771 } else if (error == 0) { 772 /* 773 * ST_WRITTEN was preserved from above. 774 * 775 * All we need to know here is: 776 * 777 * Were we writing this tape and was the last 778 * operation a write? 779 * 780 * Are there supposed to be 2FM at EOD? 781 * 782 * If both statements are true, then we backspace 783 * one filemark. 784 */ 785 stxx |= (st->flags & ST_2FM_AT_EOD); 786 if ((flags & FWRITE) != 0 && 787 (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { 788 error = st_space(st, -1, SP_FILEMARKS, 0); 789 } 790 } 791 break; 792 case EJECT_MODE: 793 st_unmount(st, EJECT); 794 break; 795 } 796 797 scsipi_wait_drain(periph); 798 799 scsipi_adapter_delref(adapt); 800 periph->periph_flags &= ~PERIPH_OPEN; 801 802 return (error); 803 } 804 805 /* 806 * Start a new mount session. 807 * Copy in all the default parameters from the selected device mode. 808 * and try guess any that seem to be defaulted. 809 */ 810 int 811 st_mount_tape(dev, flags) 812 dev_t dev; 813 int flags; 814 { 815 int unit; 816 u_int dsty; 817 struct st_softc *st; 818 struct scsipi_periph *periph; 819 int error = 0; 820 821 unit = STUNIT(dev); 822 dsty = STDSTY(dev); 823 st = st_cd.cd_devs[unit]; 824 periph = st->sc_periph; 825 826 if (st->flags & ST_MOUNTED) 827 return (0); 828 829 SC_DEBUG(periph, SCSIPI_DB1, ("mounting\n ")); 830 st->flags |= ST_NEW_MOUNT; 831 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 832 /* 833 * If the media is new, then make sure we give it a chance to 834 * to do a 'load' instruction. (We assume it is new.) 835 */ 836 if ((error = st_load(st, LD_LOAD, XS_CTL_SILENT)) != 0) 837 return (error); 838 /* 839 * Throw another dummy instruction to catch 840 * 'Unit attention' errors. Many drives give 841 * these after doing a Load instruction (with 842 * the MEDIUM MAY HAVE CHANGED asc/ascq). 843 */ 844 scsipi_test_unit_ready(periph, XS_CTL_SILENT); /* XXX */ 845 846 /* 847 * Some devices can't tell you much until they have been 848 * asked to look at the media. This quirk does this. 849 */ 850 if (st->quirks & ST_Q_SENSE_HELP) 851 if ((error = st_touch_tape(st)) != 0) 852 return (error); 853 /* 854 * Load the physical device parameters 855 * loads: blkmin, blkmax 856 */ 857 if ((error = st->ops(st, ST_OPS_RBL, 0)) != 0) 858 return (error); 859 /* 860 * Load the media dependent parameters 861 * includes: media_blksize,media_density,numblks 862 * As we have a tape in, it should be reflected here. 863 * If not you may need the "quirk" above. 864 */ 865 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 866 return (error); 867 /* 868 * If we have gained a permanent density from somewhere, 869 * then use it in preference to the one supplied by 870 * default by the driver. 871 */ 872 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 873 st->density = st->modes[dsty].density; 874 else 875 st->density = st->media_density; 876 /* 877 * If we have gained a permanent blocksize 878 * then use it in preference to the one supplied by 879 * default by the driver. 880 */ 881 st->flags &= ~ST_FIXEDBLOCKS; 882 if (st->modeflags[dsty] & 883 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 884 st->blksize = st->modes[dsty].blksize; 885 if (st->blksize) 886 st->flags |= ST_FIXEDBLOCKS; 887 } else { 888 if ((error = st_decide_mode(st, FALSE)) != 0) 889 return (error); 890 } 891 if ((error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 892 /* ATAPI will return ENODEV for this, and this may be OK */ 893 if (error != ENODEV) { 894 printf("%s: cannot set selected mode\n", 895 st->sc_dev.dv_xname); 896 return (error); 897 } 898 } 899 st->flags &= ~ST_NEW_MOUNT; 900 st->flags |= ST_MOUNTED; 901 periph->periph_flags |= PERIPH_MEDIA_LOADED; /* move earlier? */ 902 st->blkno = st->fileno = (daddr_t) 0; 903 return (0); 904 } 905 906 /* 907 * End the present mount session. 908 * Rewind, and optionally eject the tape. 909 * Reset various flags to indicate that all new 910 * operations require another mount operation 911 */ 912 void 913 st_unmount(st, eject) 914 struct st_softc *st; 915 boolean eject; 916 { 917 struct scsipi_periph *periph = st->sc_periph; 918 int nmarks; 919 920 if ((st->flags & ST_MOUNTED) == 0) 921 return; 922 SC_DEBUG(periph, SCSIPI_DB1, ("unmounting\n")); 923 st_check_eod(st, FALSE, &nmarks, XS_CTL_IGNORE_NOT_READY); 924 st_rewind(st, 0, XS_CTL_IGNORE_NOT_READY); 925 926 /* 927 * Section 9.3.3 of the SCSI specs states that a device shall return 928 * the density value specified in the last succesfull MODE SELECT 929 * after an unload operation, in case it is not able to 930 * automatically determine the density of the new medium. 931 * 932 * So we instruct the device to use the default density, which will 933 * prevent the use of stale density values (in particular, 934 * in st_touch_tape(). 935 */ 936 st->density = 0; 937 if (st->ops(st, ST_OPS_MODESELECT, 0) != 0) { 938 printf("%s: WARNING: cannot revert to default density\n", 939 st->sc_dev.dv_xname); 940 } 941 942 if (eject) { 943 st_load(st, LD_UNLOAD, XS_CTL_IGNORE_NOT_READY); 944 st->blkno = st->fileno = (daddr_t) -1; 945 } else { 946 st->blkno = st->fileno = (daddr_t) 0; 947 } 948 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 949 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 950 } 951 952 /* 953 * Given all we know about the device, media, mode, 'quirks' and 954 * initial operation, make a decision as to how we should be set 955 * to run (regarding blocking and EOD marks) 956 */ 957 int 958 st_decide_mode(st, first_read) 959 struct st_softc *st; 960 boolean first_read; 961 { 962 963 SC_DEBUG(st->sc_periph, SCSIPI_DB2, ("starting block mode decision\n")); 964 965 /* 966 * If the drive can only handle fixed-length blocks and only at 967 * one size, perhaps we should just do that. 968 */ 969 if (st->blkmin && (st->blkmin == st->blkmax)) { 970 st->flags |= ST_FIXEDBLOCKS; 971 st->blksize = st->blkmin; 972 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 973 ("blkmin == blkmax of %d\n", st->blkmin)); 974 goto done; 975 } 976 /* 977 * If the tape density mandates (or even suggests) use of fixed 978 * or variable-length blocks, comply. 979 */ 980 switch (st->density) { 981 case HALFINCH_800: 982 case HALFINCH_1600: 983 case HALFINCH_6250: 984 case DDS: 985 st->flags &= ~ST_FIXEDBLOCKS; 986 st->blksize = 0; 987 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 988 ("density specified variable\n")); 989 goto done; 990 case QIC_11: 991 case QIC_24: 992 case QIC_120: 993 case QIC_150: 994 case QIC_525: 995 case QIC_1320: 996 case QIC_3095: 997 case QIC_3220: 998 st->flags |= ST_FIXEDBLOCKS; 999 if (st->media_blksize > 0) 1000 st->blksize = st->media_blksize; 1001 else 1002 st->blksize = DEF_FIXED_BSIZE; 1003 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1004 ("density specified fixed\n")); 1005 goto done; 1006 } 1007 /* 1008 * If we're about to read the tape, perhaps we should choose 1009 * fixed or variable-length blocks and block size according to 1010 * what the drive found on the tape. 1011 */ 1012 if (first_read && 1013 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 1014 (st->media_blksize == DEF_FIXED_BSIZE) || 1015 (st->media_blksize == 1024))) { 1016 if (st->media_blksize > 0) 1017 st->flags |= ST_FIXEDBLOCKS; 1018 else 1019 st->flags &= ~ST_FIXEDBLOCKS; 1020 st->blksize = st->media_blksize; 1021 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1022 ("Used media_blksize of %d\n", st->media_blksize)); 1023 goto done; 1024 } 1025 /* 1026 * We're getting no hints from any direction. Choose variable- 1027 * length blocks arbitrarily. 1028 */ 1029 st->flags &= ~ST_FIXEDBLOCKS; 1030 st->blksize = 0; 1031 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1032 ("Give up and default to variable mode\n")); 1033 1034 done: 1035 /* 1036 * Decide whether or not to write two file marks to signify end- 1037 * of-data. Make the decision as a function of density. If 1038 * the decision is not to use a second file mark, the SCSI BLANK 1039 * CHECK condition code will be recognized as end-of-data when 1040 * first read. 1041 * (I think this should be a by-product of fixed/variable..julian) 1042 */ 1043 switch (st->density) { 1044 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 1045 case QIC_11: 1046 case QIC_24: 1047 case QIC_120: 1048 case QIC_150: 1049 case QIC_525: 1050 case QIC_1320: 1051 case QIC_3095: 1052 case QIC_3220: 1053 st->flags &= ~ST_2FM_AT_EOD; 1054 break; 1055 default: 1056 st->flags |= ST_2FM_AT_EOD; 1057 } 1058 return (0); 1059 } 1060 1061 /* 1062 * Actually translate the requested transfer into 1063 * one the physical driver can understand 1064 * The transfer is described by a buf and will include 1065 * only one physical transfer. 1066 */ 1067 void 1068 ststrategy(bp) 1069 struct buf *bp; 1070 { 1071 struct st_softc *st = st_cd.cd_devs[STUNIT(bp->b_dev)]; 1072 int s; 1073 1074 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1075 ("ststrategy %ld bytes @ blk %d\n", bp->b_bcount, bp->b_blkno)); 1076 /* 1077 * If it's a null transfer, return immediatly 1078 */ 1079 if (bp->b_bcount == 0) 1080 goto done; 1081 1082 /* If offset is negative, error */ 1083 if (bp->b_blkno < 0) { 1084 bp->b_error = EINVAL; 1085 goto bad; 1086 } 1087 1088 /* 1089 * Odd sized request on fixed drives are verboten 1090 */ 1091 if (st->flags & ST_FIXEDBLOCKS) { 1092 if (bp->b_bcount % st->blksize) { 1093 printf("%s: bad request, must be multiple of %d\n", 1094 st->sc_dev.dv_xname, st->blksize); 1095 bp->b_error = EIO; 1096 goto bad; 1097 } 1098 } 1099 /* 1100 * as are out-of-range requests on variable drives. 1101 */ 1102 else if (bp->b_bcount < st->blkmin || 1103 (st->blkmax && bp->b_bcount > st->blkmax)) { 1104 printf("%s: bad request, must be between %d and %d\n", 1105 st->sc_dev.dv_xname, st->blkmin, st->blkmax); 1106 bp->b_error = EIO; 1107 goto bad; 1108 } 1109 s = splbio(); 1110 1111 /* 1112 * Place it in the queue of activities for this tape 1113 * at the end (a bit silly because we only have on user.. 1114 * (but it could fork())) 1115 */ 1116 BUFQ_INSERT_TAIL(&st->buf_queue, bp); 1117 1118 /* 1119 * Tell the device to get going on the transfer if it's 1120 * not doing anything, otherwise just wait for completion 1121 * (All a bit silly if we're only allowing 1 open but..) 1122 */ 1123 ststart(st->sc_periph); 1124 1125 splx(s); 1126 return; 1127 bad: 1128 bp->b_flags |= B_ERROR; 1129 done: 1130 /* 1131 * Correctly set the buf to indicate a completed xfer 1132 */ 1133 bp->b_resid = bp->b_bcount; 1134 biodone(bp); 1135 return; 1136 } 1137 1138 /* 1139 * ststart looks to see if there is a buf waiting for the device 1140 * and that the device is not already busy. If both are true, 1141 * It dequeues the buf and creates a scsi command to perform the 1142 * transfer required. The transfer request will call scsipi_done 1143 * on completion, which will in turn call this routine again 1144 * so that the next queued transfer is performed. 1145 * The bufs are queued by the strategy routine (ststrategy) 1146 * 1147 * This routine is also called after other non-queued requests 1148 * have been made of the scsi driver, to ensure that the queue 1149 * continues to be drained. 1150 * ststart() is called at splbio 1151 */ 1152 void 1153 ststart(periph) 1154 struct scsipi_periph *periph; 1155 { 1156 struct st_softc *st = (void *)periph->periph_dev; 1157 struct buf *bp; 1158 struct scsi_rw_tape cmd; 1159 int flags, error; 1160 1161 SC_DEBUG(periph, SCSIPI_DB2, ("ststart ")); 1162 /* 1163 * See if there is a buf to do and we are not already 1164 * doing one 1165 */ 1166 while (periph->periph_active < periph->periph_openings) { 1167 /* if a special awaits, let it proceed first */ 1168 if (periph->periph_flags & PERIPH_WAITING) { 1169 periph->periph_flags &= ~PERIPH_WAITING; 1170 wakeup((caddr_t)periph); 1171 return; 1172 } 1173 1174 if ((bp = BUFQ_FIRST(&st->buf_queue)) == NULL) 1175 return; 1176 BUFQ_REMOVE(&st->buf_queue, bp); 1177 1178 /* 1179 * If the device has been unmounted by the user 1180 * then throw away all requests until done. 1181 */ 1182 if ((st->flags & ST_MOUNTED) == 0 || 1183 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 1184 /* make sure that one implies the other.. */ 1185 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 1186 bp->b_flags |= B_ERROR; 1187 bp->b_error = EIO; 1188 bp->b_resid = bp->b_bcount; 1189 biodone(bp); 1190 continue; 1191 } 1192 /* 1193 * only FIXEDBLOCK devices have pending I/O or space operations. 1194 */ 1195 if (st->flags & ST_FIXEDBLOCKS) { 1196 /* 1197 * If we are at a filemark but have not reported it yet 1198 * then we should report it now 1199 */ 1200 if (st->flags & ST_AT_FILEMARK) { 1201 if ((bp->b_flags & B_READ) == B_WRITE) { 1202 /* 1203 * Handling of ST_AT_FILEMARK in 1204 * st_space will fill in the right file 1205 * mark count. 1206 * Back up over filemark 1207 */ 1208 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1209 bp->b_flags |= B_ERROR; 1210 bp->b_error = EIO; 1211 biodone(bp); 1212 continue; 1213 } 1214 } else { 1215 bp->b_resid = bp->b_bcount; 1216 bp->b_error = 0; 1217 bp->b_flags &= ~B_ERROR; 1218 st->flags &= ~ST_AT_FILEMARK; 1219 biodone(bp); 1220 continue; /* seek more work */ 1221 } 1222 } 1223 } 1224 /* 1225 * If we are at EOM but have not reported it 1226 * yet then we should report it now. 1227 */ 1228 if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { 1229 bp->b_resid = bp->b_bcount; 1230 if (st->flags & ST_EIO_PENDING) { 1231 bp->b_error = EIO; 1232 bp->b_flags |= B_ERROR; 1233 } 1234 st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); 1235 biodone(bp); 1236 continue; /* seek more work */ 1237 } 1238 1239 /* 1240 * Fill out the scsi command 1241 */ 1242 memset(&cmd, 0, sizeof(cmd)); 1243 flags = XS_CTL_NOSLEEP | XS_CTL_ASYNC; 1244 if ((bp->b_flags & B_READ) == B_WRITE) { 1245 cmd.opcode = WRITE; 1246 st->flags &= ~ST_FM_WRITTEN; 1247 flags |= XS_CTL_DATA_OUT; 1248 } else { 1249 cmd.opcode = READ; 1250 flags |= XS_CTL_DATA_IN; 1251 } 1252 1253 /* 1254 * Handle "fixed-block-mode" tape drives by using the 1255 * block count instead of the length. 1256 */ 1257 if (st->flags & ST_FIXEDBLOCKS) { 1258 cmd.byte2 |= SRW_FIXED; 1259 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1260 } else 1261 _lto3b(bp->b_bcount, cmd.len); 1262 1263 /* 1264 * Clear 'position updated' indicator 1265 */ 1266 st->flags &= ~ST_POSUPDATED; 1267 1268 /* 1269 * go ask the adapter to do all this for us 1270 */ 1271 error = scsipi_command(periph, 1272 (struct scsipi_generic *)&cmd, sizeof(cmd), 1273 (u_char *)bp->b_data, bp->b_bcount, 1274 0, ST_IO_TIME, bp, flags); 1275 if (error) { 1276 printf("%s: not queued, error %d\n", 1277 st->sc_dev.dv_xname, error); 1278 } 1279 } /* go back and see if we can cram more work in.. */ 1280 } 1281 1282 void 1283 stdone(xs) 1284 struct scsipi_xfer *xs; 1285 { 1286 struct st_softc *st = (void *)xs->xs_periph->periph_dev; 1287 1288 if (xs->bp != NULL) { 1289 if ((xs->bp->b_flags & B_READ) == B_WRITE) { 1290 st->flags |= ST_WRITTEN; 1291 } else { 1292 st->flags &= ~ST_WRITTEN; 1293 } 1294 #if NRND > 0 1295 rnd_add_uint32(&st->rnd_source, xs->bp->b_blkno); 1296 #endif 1297 1298 if ((st->flags & ST_POSUPDATED) == 0) { 1299 if (xs->bp->b_flags & B_ERROR) { 1300 st->fileno = st->blkno = -1; 1301 } else if (st->blkno != -1) { 1302 if (st->flags & ST_FIXEDBLOCKS) { 1303 st->blkno += 1304 (xs->bp->b_bcount / st->blksize); 1305 } else { 1306 st->blkno++; 1307 } 1308 } 1309 } 1310 } 1311 } 1312 1313 int 1314 stread(dev, uio, iomode) 1315 dev_t dev; 1316 struct uio *uio; 1317 int iomode; 1318 { 1319 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1320 1321 return (physio(ststrategy, NULL, dev, B_READ, 1322 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1323 } 1324 1325 int 1326 stwrite(dev, uio, iomode) 1327 dev_t dev; 1328 struct uio *uio; 1329 int iomode; 1330 { 1331 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1332 1333 return (physio(ststrategy, NULL, dev, B_WRITE, 1334 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1335 } 1336 1337 /* 1338 * Perform special action on behalf of the user; 1339 * knows about the internals of this device 1340 */ 1341 int 1342 stioctl(dev, cmd, arg, flag, p) 1343 dev_t dev; 1344 u_long cmd; 1345 caddr_t arg; 1346 int flag; 1347 struct proc *p; 1348 { 1349 int error = 0; 1350 int unit; 1351 int number, nmarks, dsty; 1352 int flags; 1353 struct st_softc *st; 1354 int hold_blksize; 1355 u_int8_t hold_density; 1356 struct mtop *mt = (struct mtop *) arg; 1357 1358 /* 1359 * Find the device that the user is talking about 1360 */ 1361 flags = 0; /* give error messages, act on errors etc. */ 1362 unit = STUNIT(dev); 1363 dsty = STDSTY(dev); 1364 st = st_cd.cd_devs[unit]; 1365 hold_blksize = st->blksize; 1366 hold_density = st->density; 1367 1368 switch ((u_int) cmd) { 1369 1370 case MTIOCGET: { 1371 struct mtget *g = (struct mtget *) arg; 1372 /* 1373 * (to get the current state of READONLY) 1374 */ 1375 error = st->ops(st, ST_OPS_MODESENSE, XS_CTL_SILENT); 1376 if (error) { 1377 /* 1378 * Ignore the error if in control mode; 1379 * this is mandated by st(4). 1380 */ 1381 if (STMODE(dev) != CTRL_MODE) 1382 break; 1383 error = 0; 1384 } 1385 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("[ioctl: get status]\n")); 1386 memset(g, 0, sizeof(struct mtget)); 1387 g->mt_type = 0x7; /* Ultrix compat *//*? */ 1388 g->mt_blksiz = st->blksize; 1389 g->mt_density = st->density; 1390 g->mt_mblksiz[0] = st->modes[0].blksize; 1391 g->mt_mblksiz[1] = st->modes[1].blksize; 1392 g->mt_mblksiz[2] = st->modes[2].blksize; 1393 g->mt_mblksiz[3] = st->modes[3].blksize; 1394 g->mt_mdensity[0] = st->modes[0].density; 1395 g->mt_mdensity[1] = st->modes[1].density; 1396 g->mt_mdensity[2] = st->modes[2].density; 1397 g->mt_mdensity[3] = st->modes[3].density; 1398 g->mt_fileno = st->fileno; 1399 g->mt_blkno = st->blkno; 1400 if (st->flags & ST_READONLY) 1401 g->mt_dsreg |= MT_DS_RDONLY; 1402 if (st->flags & ST_MOUNTED) 1403 g->mt_dsreg |= MT_DS_MOUNTED; 1404 g->mt_resid = st->mt_resid; 1405 g->mt_erreg = st->mt_erreg; 1406 /* 1407 * clear latched errors. 1408 */ 1409 st->mt_resid = 0; 1410 st->mt_erreg = 0; 1411 st->asc = 0; 1412 st->ascq = 0; 1413 break; 1414 } 1415 case MTIOCTOP: { 1416 1417 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1418 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1419 mt->mt_count)); 1420 1421 /* compat: in U*x it is a short */ 1422 number = mt->mt_count; 1423 switch ((short) (mt->mt_op)) { 1424 case MTWEOF: /* write an end-of-file record */ 1425 error = st_write_filemarks(st, number, flags); 1426 break; 1427 case MTBSF: /* backward space file */ 1428 number = -number; 1429 case MTFSF: /* forward space file */ 1430 error = st_check_eod(st, FALSE, &nmarks, flags); 1431 if (!error) 1432 error = st_space(st, number - nmarks, 1433 SP_FILEMARKS, flags); 1434 break; 1435 case MTBSR: /* backward space record */ 1436 number = -number; 1437 case MTFSR: /* forward space record */ 1438 error = st_check_eod(st, TRUE, &nmarks, flags); 1439 if (!error) 1440 error = st_space(st, number, SP_BLKS, flags); 1441 break; 1442 case MTREW: /* rewind */ 1443 error = st_rewind(st, 0, flags); 1444 break; 1445 case MTOFFL: /* rewind and put the drive offline */ 1446 st_unmount(st, EJECT); 1447 break; 1448 case MTNOP: /* no operation, sets status only */ 1449 break; 1450 case MTRETEN: /* retension the tape */ 1451 error = st_load(st, LD_RETENSION, flags); 1452 if (!error) 1453 error = st_load(st, LD_LOAD, flags); 1454 break; 1455 case MTEOM: /* forward space to end of media */ 1456 error = st_check_eod(st, FALSE, &nmarks, flags); 1457 if (!error) 1458 error = st_space(st, 1, SP_EOM, flags); 1459 break; 1460 case MTCACHE: /* enable controller cache */ 1461 st->flags &= ~ST_DONTBUFFER; 1462 goto try_new_value; 1463 case MTNOCACHE: /* disable controller cache */ 1464 st->flags |= ST_DONTBUFFER; 1465 goto try_new_value; 1466 case MTERASE: /* erase volume */ 1467 error = st_erase(st, number, flags); 1468 break; 1469 case MTSETBSIZ: /* Set block size for device */ 1470 #ifdef NOTYET 1471 if (!(st->flags & ST_NEW_MOUNT)) { 1472 uprintf("re-mount tape before changing blocksize"); 1473 error = EINVAL; 1474 break; 1475 } 1476 #endif 1477 if (number == 0) 1478 st->flags &= ~ST_FIXEDBLOCKS; 1479 else { 1480 if ((st->blkmin || st->blkmax) && 1481 (number < st->blkmin || 1482 number > st->blkmax)) { 1483 error = EINVAL; 1484 break; 1485 } 1486 st->flags |= ST_FIXEDBLOCKS; 1487 } 1488 st->blksize = number; 1489 st->flags |= ST_BLOCK_SET; /*XXX */ 1490 goto try_new_value; 1491 1492 case MTSETDNSTY: /* Set density for device and mode */ 1493 /* 1494 * Any number >= 0 and <= 0xff is legal. Numbers 1495 * above 0x80 are 'vendor unique'. 1496 */ 1497 if (number < 0 || number > 255) { 1498 error = EINVAL; 1499 break; 1500 } else 1501 st->density = number; 1502 goto try_new_value; 1503 1504 case MTCMPRESS: 1505 error = st->ops(st, (number == 0) ? 1506 ST_OPS_CMPRSS_OFF : ST_OPS_CMPRSS_ON, 1507 XS_CTL_SILENT); 1508 break; 1509 1510 case MTEWARN: 1511 if (number) 1512 st->flags |= ST_EARLYWARN; 1513 else 1514 st->flags &= ~ST_EARLYWARN; 1515 break; 1516 1517 default: 1518 error = EINVAL; 1519 } 1520 break; 1521 } 1522 case MTIOCIEOT: 1523 case MTIOCEEOT: 1524 break; 1525 1526 case MTIOCRDSPOS: 1527 error = st_rdpos(st, 0, (u_int32_t *) arg); 1528 break; 1529 1530 case MTIOCRDHPOS: 1531 error = st_rdpos(st, 1, (u_int32_t *) arg); 1532 break; 1533 1534 case MTIOCSLOCATE: 1535 error = st_setpos(st, 0, (u_int32_t *) arg); 1536 break; 1537 1538 case MTIOCHLOCATE: 1539 error = st_setpos(st, 1, (u_int32_t *) arg); 1540 break; 1541 1542 1543 default: 1544 error = scsipi_do_ioctl(st->sc_periph, dev, cmd, arg, 1545 flag, p); 1546 break; 1547 } 1548 return (error); 1549 /*-----------------------------*/ 1550 try_new_value: 1551 /* 1552 * Check that the mode being asked for is aggreeable to the 1553 * drive. If not, put it back the way it was. 1554 * 1555 * If in control mode, we can make (persistent) mode changes 1556 * even if no medium is loaded (see st(4)). 1557 */ 1558 if ((STMODE(dev) != CTRL_MODE || (st->flags & ST_MOUNTED) != 0) && 1559 (error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 1560 /* put it back as it was */ 1561 printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); 1562 st->density = hold_density; 1563 st->blksize = hold_blksize; 1564 if (st->blksize) 1565 st->flags |= ST_FIXEDBLOCKS; 1566 else 1567 st->flags &= ~ST_FIXEDBLOCKS; 1568 return (error); 1569 } 1570 /* 1571 * As the drive liked it, if we are setting a new default, 1572 * set it into the structures as such. 1573 * 1574 * The means for deciding this are not finalised yet- but 1575 * if the device was opened in Control Mode, the values 1576 * are persistent now across mounts. 1577 */ 1578 if (STMODE(dev) == CTRL_MODE) { 1579 switch ((short) (mt->mt_op)) { 1580 case MTSETBSIZ: 1581 st->modes[dsty].blksize = st->blksize; 1582 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1583 break; 1584 case MTSETDNSTY: 1585 st->modes[dsty].density = st->density; 1586 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1587 break; 1588 } 1589 } 1590 return (0); 1591 } 1592 1593 /* 1594 * Do a synchronous read. 1595 */ 1596 int 1597 st_read(st, buf, size, flags) 1598 struct st_softc *st; 1599 int size; 1600 int flags; 1601 char *buf; 1602 { 1603 struct scsi_rw_tape cmd; 1604 1605 /* 1606 * If it's a null transfer, return immediatly 1607 */ 1608 if (size == 0) 1609 return (0); 1610 memset(&cmd, 0, sizeof(cmd)); 1611 cmd.opcode = READ; 1612 if (st->flags & ST_FIXEDBLOCKS) { 1613 cmd.byte2 |= SRW_FIXED; 1614 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1615 cmd.len); 1616 } else 1617 _lto3b(size, cmd.len); 1618 return (scsipi_command(st->sc_periph, 1619 (struct scsipi_generic *)&cmd, sizeof(cmd), 1620 (u_char *)buf, size, 0, ST_IO_TIME, NULL, flags | XS_CTL_DATA_IN)); 1621 } 1622 1623 /* 1624 * issue an erase command 1625 */ 1626 int 1627 st_erase(st, full, flags) 1628 struct st_softc *st; 1629 int full, flags; 1630 { 1631 int tmo; 1632 struct scsi_erase cmd; 1633 1634 /* 1635 * Full erase means set LONG bit in erase command, which asks 1636 * the drive to erase the entire unit. Without this bit, we're 1637 * asking the drive to write an erase gap. 1638 */ 1639 memset(&cmd, 0, sizeof(cmd)); 1640 cmd.opcode = ERASE; 1641 if (full) { 1642 cmd.byte2 = SE_LONG; 1643 tmo = ST_SPC_TIME; 1644 } else { 1645 tmo = ST_IO_TIME; 1646 } 1647 1648 /* 1649 * XXX We always do this asynchronously, for now, unless the device 1650 * has the ST_Q_ERASE_NOIMM quirk. How long should we wait if we 1651 * want to (eventually) to it synchronously? 1652 */ 1653 if ((st->quirks & ST_Q_ERASE_NOIMM) == 0) 1654 cmd.byte2 |= SE_IMMED; 1655 1656 return (scsipi_command(st->sc_periph, 1657 (struct scsipi_generic *)&cmd, sizeof(cmd), 1658 0, 0, ST_RETRIES, tmo, NULL, flags)); 1659 } 1660 1661 /* 1662 * skip N blocks/filemarks/seq filemarks/eom 1663 */ 1664 int 1665 st_space(st, number, what, flags) 1666 struct st_softc *st; 1667 u_int what; 1668 int flags; 1669 int number; 1670 { 1671 struct scsi_space cmd; 1672 int error; 1673 1674 switch (what) { 1675 case SP_BLKS: 1676 if (st->flags & ST_PER_ACTION) { 1677 if (number > 0) { 1678 st->flags &= ~ST_PER_ACTION; 1679 return (EIO); 1680 } else if (number < 0) { 1681 if (st->flags & ST_AT_FILEMARK) { 1682 /* 1683 * Handling of ST_AT_FILEMARK 1684 * in st_space will fill in the 1685 * right file mark count. 1686 */ 1687 error = st_space(st, 0, SP_FILEMARKS, 1688 flags); 1689 if (error) 1690 return (error); 1691 } 1692 if (st->flags & ST_BLANK_READ) { 1693 st->flags &= ~ST_BLANK_READ; 1694 return (EIO); 1695 } 1696 st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); 1697 } 1698 } 1699 break; 1700 case SP_FILEMARKS: 1701 if (st->flags & ST_EIO_PENDING) { 1702 if (number > 0) { 1703 /* pretend we just discovered the error */ 1704 st->flags &= ~ST_EIO_PENDING; 1705 return (EIO); 1706 } else if (number < 0) { 1707 /* back away from the error */ 1708 st->flags &= ~ST_EIO_PENDING; 1709 } 1710 } 1711 if (st->flags & ST_AT_FILEMARK) { 1712 st->flags &= ~ST_AT_FILEMARK; 1713 number--; 1714 } 1715 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 1716 /* back away from unwritten tape */ 1717 st->flags &= ~ST_BLANK_READ; 1718 number++; /* XXX dubious */ 1719 } 1720 break; 1721 case SP_EOM: 1722 if (st->flags & ST_EOM_PENDING) { 1723 /* we're already there */ 1724 st->flags &= ~ST_EOM_PENDING; 1725 return (0); 1726 } 1727 if (st->flags & ST_EIO_PENDING) { 1728 /* pretend we just discovered the error */ 1729 st->flags &= ~ST_EIO_PENDING; 1730 return (EIO); 1731 } 1732 if (st->flags & ST_AT_FILEMARK) 1733 st->flags &= ~ST_AT_FILEMARK; 1734 break; 1735 } 1736 if (number == 0) 1737 return (0); 1738 1739 memset(&cmd, 0, sizeof(cmd)); 1740 cmd.opcode = SPACE; 1741 cmd.byte2 = what; 1742 _lto3b(number, cmd.number); 1743 1744 st->flags &= ~ST_POSUPDATED; 1745 st->last_ctl_resid = 0; 1746 error = scsipi_command(st->sc_periph, 1747 (struct scsipi_generic *)&cmd, sizeof(cmd), 1748 0, 0, 0, ST_SPC_TIME, NULL, flags); 1749 1750 if (error == 0 && (st->flags & ST_POSUPDATED) == 0) { 1751 number = number - st->last_ctl_resid; 1752 if (what == SP_BLKS) { 1753 if (st->blkno != -1) { 1754 st->blkno += number; 1755 } 1756 } else if (what == SP_FILEMARKS) { 1757 if (st->fileno != -1) { 1758 st->fileno += number; 1759 if (number > 0) { 1760 st->blkno = 0; 1761 } else if (number < 0) { 1762 st->blkno = -1; 1763 } 1764 } 1765 } else if (what == SP_EOM) { 1766 /* 1767 * This loses us relative position. 1768 */ 1769 st->fileno = st->blkno = -1; 1770 } 1771 } 1772 return (error); 1773 } 1774 1775 /* 1776 * write N filemarks 1777 */ 1778 int 1779 st_write_filemarks(st, number, flags) 1780 struct st_softc *st; 1781 int flags; 1782 int number; 1783 { 1784 int error; 1785 struct scsi_write_filemarks cmd; 1786 1787 /* 1788 * It's hard to write a negative number of file marks. 1789 * Don't try. 1790 */ 1791 if (number < 0) 1792 return (EINVAL); 1793 switch (number) { 1794 case 0: /* really a command to sync the drive's buffers */ 1795 break; 1796 case 1: 1797 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 1798 st->flags &= ~ST_WRITTEN; 1799 else 1800 st->flags |= ST_FM_WRITTEN; 1801 st->flags &= ~ST_PER_ACTION; 1802 break; 1803 default: 1804 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 1805 } 1806 1807 memset(&cmd, 0, sizeof(cmd)); 1808 cmd.opcode = WRITE_FILEMARKS; 1809 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1810 cmd.byte2 = SR_IMMED; 1811 /* 1812 * The ATAPI Onstream DI-30 doesn't support writing filemarks, but 1813 * WRITE_FILEMARKS is still used to flush the buffer 1814 */ 1815 if ((st->quirks & ST_Q_NOFILEMARKS) == 0) 1816 _lto3b(number, cmd.number); 1817 1818 /* XXX WE NEED TO BE ABLE TO GET A RESIDIUAL XXX */ 1819 error = scsipi_command(st->sc_periph, 1820 (struct scsipi_generic *)&cmd, sizeof(cmd), 1821 0, 0, 0, ST_IO_TIME * 4, NULL, flags); 1822 if (error == 0 && st->fileno != -1) { 1823 st->fileno += number; 1824 } 1825 return (error); 1826 } 1827 1828 /* 1829 * Make sure the right number of file marks is on tape if the 1830 * tape has been written. If the position argument is true, 1831 * leave the tape positioned where it was originally. 1832 * 1833 * nmarks returns the number of marks to skip (or, if position 1834 * true, which were skipped) to get back original position. 1835 */ 1836 int 1837 st_check_eod(st, position, nmarks, flags) 1838 struct st_softc *st; 1839 boolean position; 1840 int *nmarks; 1841 int flags; 1842 { 1843 int error; 1844 1845 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 1846 default: 1847 *nmarks = 0; 1848 return (0); 1849 case ST_WRITTEN: 1850 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 1851 *nmarks = 1; 1852 break; 1853 case ST_WRITTEN | ST_2FM_AT_EOD: 1854 *nmarks = 2; 1855 } 1856 error = st_write_filemarks(st, *nmarks, flags); 1857 if (position && !error) 1858 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 1859 return (error); 1860 } 1861 1862 /* 1863 * load/unload/retension 1864 */ 1865 int 1866 st_load(st, type, flags) 1867 struct st_softc *st; 1868 u_int type; 1869 int flags; 1870 { 1871 int error; 1872 struct scsi_load cmd; 1873 1874 if (type != LD_LOAD) { 1875 int nmarks; 1876 1877 error = st_check_eod(st, FALSE, &nmarks, flags); 1878 if (error) { 1879 printf("%s: failed to write closing filemarks at " 1880 "unload, errno=%d\n", st->sc_dev.dv_xname, error); 1881 return (error); 1882 } 1883 } 1884 if (st->quirks & ST_Q_IGNORE_LOADS) { 1885 if (type == LD_LOAD) { 1886 /* 1887 * If we ignore loads, at least we should try a rewind. 1888 */ 1889 return st_rewind(st, 0, flags); 1890 } 1891 /* otherwise, we should do what's asked of us */ 1892 } 1893 1894 memset(&cmd, 0, sizeof(cmd)); 1895 cmd.opcode = LOAD; 1896 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1897 cmd.byte2 = SR_IMMED; 1898 cmd.how = type; 1899 1900 error = scsipi_command(st->sc_periph, 1901 (struct scsipi_generic *)&cmd, sizeof(cmd), 1902 0, 0, ST_RETRIES, ST_SPC_TIME, NULL, flags); 1903 if (error) { 1904 printf("%s: error %d in st_load (op %d)\n", 1905 st->sc_dev.dv_xname, error, type); 1906 } 1907 return (error); 1908 } 1909 1910 /* 1911 * Rewind the device 1912 */ 1913 int 1914 st_rewind(st, immediate, flags) 1915 struct st_softc *st; 1916 u_int immediate; 1917 int flags; 1918 { 1919 struct scsi_rewind cmd; 1920 int error; 1921 int nmarks; 1922 1923 error = st_check_eod(st, FALSE, &nmarks, flags); 1924 if (error) { 1925 printf("%s: failed to write closing filemarks at " 1926 "rewind, errno=%d\n", st->sc_dev.dv_xname, error); 1927 return (error); 1928 } 1929 st->flags &= ~ST_PER_ACTION; 1930 1931 /* 1932 * ATAPI tapes always need immediate to be set 1933 */ 1934 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1935 immediate = SR_IMMED; 1936 1937 memset(&cmd, 0, sizeof(cmd)); 1938 cmd.opcode = REWIND; 1939 cmd.byte2 = immediate; 1940 1941 error = scsipi_command(st->sc_periph, 1942 (struct scsipi_generic *)&cmd, sizeof(cmd), 0, 0, ST_RETRIES, 1943 immediate ? ST_CTL_TIME: ST_SPC_TIME, NULL, flags); 1944 if (error) { 1945 printf("%s: error %d trying to rewind\n", 1946 st->sc_dev.dv_xname, error); 1947 /* lost position */ 1948 st->fileno = st->blkno = -1; 1949 } else { 1950 st->fileno = st->blkno = 0; 1951 } 1952 return (error); 1953 } 1954 1955 int 1956 st_rdpos(st, hard, blkptr) 1957 struct st_softc *st; 1958 int hard; 1959 u_int32_t *blkptr; 1960 { 1961 int error; 1962 u_int8_t posdata[20]; 1963 struct scsi_tape_read_position cmd; 1964 1965 /* 1966 * We try and flush any buffered writes here if we were writing 1967 * and we're trying to get hardware block position. It eats 1968 * up performance substantially, but I'm wary of drive firmware. 1969 * 1970 * I think that *logical* block position is probably okay- 1971 * but hardware block position might have to wait for data 1972 * to hit media to be valid. Caveat Emptor. 1973 */ 1974 1975 if (hard && (st->flags & ST_WRITTEN)) { 1976 /* 1977 * First flush any pending writes... 1978 */ 1979 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 1980 /* 1981 * The latter case is for 'write protected' tapes 1982 * which are too stupid to recognize a zero count 1983 * for writing filemarks as a no-op. 1984 */ 1985 if (error != 0 && error != EACCES && error != EROFS) 1986 return (error); 1987 } 1988 1989 memset(&cmd, 0, sizeof(cmd)); 1990 memset(&posdata, 0, sizeof(posdata)); 1991 cmd.opcode = READ_POSITION; 1992 if (hard) 1993 cmd.byte1 = 1; 1994 1995 error = scsipi_command(st->sc_periph, 1996 (struct scsipi_generic *)&cmd, sizeof(cmd), (u_char *)&posdata, 1997 sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, 1998 XS_CTL_SILENT | XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); 1999 2000 if (error == 0) { 2001 #if 0 2002 printf("posdata:"); 2003 for (hard = 0; hard < sizeof(posdata); hard++) 2004 printf("%02x ", posdata[hard] & 0xff); 2005 printf("\n"); 2006 #endif 2007 if (posdata[0] & 0x4) /* Block Position Unknown */ 2008 error = EINVAL; 2009 else 2010 *blkptr = _4btol(&posdata[4]); 2011 } 2012 return (error); 2013 } 2014 2015 int 2016 st_setpos(st, hard, blkptr) 2017 struct st_softc *st; 2018 int hard; 2019 u_int32_t *blkptr; 2020 { 2021 int error; 2022 struct scsi_tape_locate cmd; 2023 2024 /* 2025 * We used to try and flush any buffered writes here. 2026 * Now we push this onto user applications to either 2027 * flush the pending writes themselves (via a zero count 2028 * WRITE FILEMARKS command) or they can trust their tape 2029 * drive to do this correctly for them. 2030 * 2031 * There are very ugly performance limitations otherwise. 2032 */ 2033 2034 memset(&cmd, 0, sizeof(cmd)); 2035 cmd.opcode = LOCATE; 2036 if (hard) 2037 cmd.byte2 = 1 << 2; 2038 _lto4b(*blkptr, cmd.blkaddr); 2039 error = scsipi_command(st->sc_periph, 2040 (struct scsipi_generic *)&cmd, sizeof(cmd), 2041 NULL, 0, ST_RETRIES, ST_SPC_TIME, NULL, 0); 2042 /* 2043 * Note file && block number position now unknown (if 2044 * these things ever start being maintained in this driver) 2045 */ 2046 st->fileno = st->blkno = -1; 2047 return (error); 2048 } 2049 2050 2051 /* 2052 * Look at the returned sense and act on the error and determine 2053 * the unix error number to pass back..., 0 (== report no error), 2054 * -1 = retry the operation, -2 continue error processing. 2055 */ 2056 int 2057 st_interpret_sense(xs) 2058 struct scsipi_xfer *xs; 2059 { 2060 struct scsipi_periph *periph = xs->xs_periph; 2061 struct scsipi_sense_data *sense = &xs->sense.scsi_sense; 2062 struct buf *bp = xs->bp; 2063 struct st_softc *st = (void *)periph->periph_dev; 2064 int retval = EJUSTRETURN; 2065 int doprint = ((xs->xs_control & XS_CTL_SILENT) == 0); 2066 u_int8_t key; 2067 int32_t info; 2068 2069 /* 2070 * If it isn't a extended or extended/deferred error, let 2071 * the generic code handle it. 2072 */ 2073 if ((sense->error_code & SSD_ERRCODE) != 0x70 && 2074 (sense->error_code & SSD_ERRCODE) != 0x71) { /* DEFFERRED */ 2075 return (retval); 2076 } 2077 2078 if (sense->error_code & SSD_ERRCODE_VALID) 2079 info = _4btol(sense->info); 2080 else 2081 info = (st->flags & ST_FIXEDBLOCKS) ? 2082 xs->datalen / st->blksize : xs->datalen; 2083 key = sense->flags & SSD_KEY; 2084 st->mt_erreg = key; 2085 st->asc = sense->add_sense_code; 2086 st->ascq = sense->add_sense_code_qual; 2087 st->mt_resid = (short) info; 2088 2089 if (key == SKEY_NOT_READY && st->asc == 0x4 && st->ascq == 0x1) { 2090 /* Not Ready, Logical Unit Is in Process Of Becoming Ready */ 2091 scsipi_periph_freeze(periph, 1); 2092 callout_reset(&periph->periph_callout, 2093 hz, scsipi_periph_timed_thaw, periph); 2094 return (ERESTART); 2095 } 2096 2097 /* 2098 * If the device is not open yet, let generic handle 2099 */ 2100 if ((periph->periph_flags & PERIPH_OPEN) == 0) { 2101 return (retval); 2102 } 2103 2104 xs->resid = info; 2105 if (st->flags & ST_FIXEDBLOCKS) { 2106 if (bp) { 2107 xs->resid *= st->blksize; 2108 st->last_io_resid = xs->resid; 2109 } else { 2110 st->last_ctl_resid = xs->resid; 2111 } 2112 if (key == SKEY_VOLUME_OVERFLOW) { 2113 st->flags |= ST_EIO_PENDING; 2114 if (bp) 2115 bp->b_resid = xs->resid; 2116 } else if (sense->flags & SSD_EOM) { 2117 if ((st->flags & ST_EARLYWARN) == 0) 2118 st->flags |= ST_EIO_PENDING; 2119 st->flags |= ST_EOM_PENDING; 2120 if (bp) { 2121 #if 0 2122 bp->b_resid = xs->resid; 2123 #else 2124 /* 2125 * Grotesque as it seems, the few times 2126 * I've actually seen a non-zero resid, 2127 * the tape drive actually lied and had 2128 * written all the data! 2129 */ 2130 bp->b_resid = 0; 2131 #endif 2132 } 2133 } 2134 if (sense->flags & SSD_FILEMARK) { 2135 st->flags |= ST_AT_FILEMARK; 2136 if (bp) 2137 bp->b_resid = xs->resid; 2138 if (st->fileno != (daddr_t) -1) { 2139 st->fileno++; 2140 st->blkno = 0; 2141 st->flags |= ST_POSUPDATED; 2142 } 2143 } 2144 if (sense->flags & SSD_ILI) { 2145 st->flags |= ST_EIO_PENDING; 2146 if (bp) 2147 bp->b_resid = xs->resid; 2148 if (sense->error_code & SSD_ERRCODE_VALID && 2149 (xs->xs_control & XS_CTL_SILENT) == 0) 2150 printf("%s: block wrong size, %d blocks " 2151 "residual\n", st->sc_dev.dv_xname, info); 2152 2153 /* 2154 * This quirk code helps the drive read 2155 * the first tape block, regardless of 2156 * format. That is required for these 2157 * drives to return proper MODE SENSE 2158 * information. 2159 */ 2160 if ((st->quirks & ST_Q_SENSE_HELP) && 2161 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 2162 st->blksize -= 512; 2163 else if ((st->flags & ST_POSUPDATED) == 0) { 2164 if (st->blkno != (daddr_t) -1) { 2165 st->blkno += 2166 (xs->datalen / st->blksize); 2167 st->flags |= ST_POSUPDATED; 2168 } 2169 } 2170 } 2171 /* 2172 * If data wanted and no data was transferred, do it immediately 2173 */ 2174 if (xs->datalen && xs->resid >= xs->datalen) { 2175 if (st->flags & ST_EIO_PENDING) 2176 return (EIO); 2177 if (st->flags & ST_AT_FILEMARK) { 2178 if (bp) 2179 bp->b_resid = xs->resid; 2180 return (0); 2181 } 2182 } 2183 } else { /* must be variable mode */ 2184 if (bp) { 2185 st->last_io_resid = xs->resid; 2186 } else { 2187 st->last_ctl_resid = xs->resid; 2188 } 2189 if (sense->flags & SSD_EOM) { 2190 /* 2191 * The current semantics of this 2192 * driver requires EOM detection 2193 * to return EIO unless early 2194 * warning detection is enabled 2195 * for variable mode (this is always 2196 * on for fixed block mode). 2197 */ 2198 if (st->flags & ST_EARLYWARN) { 2199 st->flags |= ST_EOM_PENDING; 2200 retval = 0; 2201 } else { 2202 retval = EIO; 2203 } 2204 2205 /* 2206 * If it's an unadorned EOM detection, 2207 * suppress printing an error. 2208 */ 2209 if (key == SKEY_NO_SENSE) { 2210 doprint = 0; 2211 } 2212 } else if (sense->flags & SSD_FILEMARK) { 2213 retval = 0; 2214 if (st->fileno != (daddr_t) -1) { 2215 st->fileno++; 2216 st->blkno = 0; 2217 st->flags |= ST_POSUPDATED; 2218 } 2219 } else if (sense->flags & SSD_ILI) { 2220 if (info < 0) { 2221 /* 2222 * The tape record was bigger than the read 2223 * we issued. 2224 */ 2225 if ((xs->xs_control & XS_CTL_SILENT) == 0) { 2226 printf("%s: %d-byte tape record too big" 2227 " for %d-byte user buffer\n", 2228 st->sc_dev.dv_xname, 2229 xs->datalen - info, xs->datalen); 2230 } 2231 retval = EIO; 2232 } else { 2233 retval = 0; 2234 if (st->blkno != (daddr_t) -1) { 2235 st->blkno++; 2236 st->flags |= ST_POSUPDATED; 2237 } 2238 } 2239 } 2240 if (bp) 2241 bp->b_resid = info; 2242 } 2243 2244 #ifndef SCSIPI_DEBUG 2245 if (retval == 0 && key == SKEY_NO_SENSE) 2246 doprint = 0; 2247 #endif 2248 if (key == SKEY_BLANK_CHECK) { 2249 /* 2250 * This quirk code helps the drive read the 2251 * first tape block, regardless of format. That 2252 * is required for these drives to return proper 2253 * MODE SENSE information. 2254 */ 2255 if ((st->quirks & ST_Q_SENSE_HELP) && 2256 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 2257 /* still starting */ 2258 st->blksize -= 512; 2259 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 2260 st->flags |= ST_BLANK_READ; 2261 xs->resid = xs->datalen; 2262 if (bp) { 2263 bp->b_resid = xs->resid; 2264 /* return an EOF */ 2265 } 2266 retval = 0; 2267 /* lost position */ 2268 st->fileno = st->blkno = -1; 2269 } 2270 } 2271 2272 /* 2273 * If generic sense processing will continue, we should not 2274 * print sense info here. 2275 */ 2276 if (retval == EJUSTRETURN) 2277 doprint = 0; 2278 2279 if (doprint) { 2280 #ifdef SCSIVERBOSE 2281 scsipi_print_sense(xs, 0); 2282 #else 2283 scsipi_printaddr(periph); 2284 printf("Sense Key 0x%02x", key); 2285 if ((sense->error_code & SSD_ERRCODE_VALID) != 0) { 2286 switch (key) { 2287 case SKEY_NOT_READY: 2288 case SKEY_ILLEGAL_REQUEST: 2289 case SKEY_UNIT_ATTENTION: 2290 case SKEY_WRITE_PROTECT: 2291 break; 2292 case SKEY_VOLUME_OVERFLOW: 2293 case SKEY_BLANK_CHECK: 2294 printf(", requested size: %d (decimal)", info); 2295 break; 2296 case SKEY_ABORTED_COMMAND: 2297 if (xs->xs_retries) 2298 printf(", retrying"); 2299 printf(", cmd 0x%x, info 0x%x", 2300 xs->cmd->opcode, info); 2301 break; 2302 default: 2303 printf(", info = %d (decimal)", info); 2304 } 2305 } 2306 if (sense->extra_len != 0) { 2307 int n; 2308 printf(", data ="); 2309 for (n = 0; n < sense->extra_len; n++) 2310 printf(" %02x", sense->cmd_spec_info[n]); 2311 } 2312 printf("\n"); 2313 #endif 2314 } 2315 return (retval); 2316 } 2317 2318 /* 2319 * The quirk here is that the drive returns some value to st_mode_sense 2320 * incorrectly until the tape has actually passed by the head. 2321 * 2322 * The method is to set the drive to large fixed-block state (user-specified 2323 * density and 1024-byte blocks), then read and rewind to get it to sense the 2324 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 2325 * work, as a last resort, try variable- length blocks. The result will be 2326 * the ability to do an accurate st_mode_sense. 2327 * 2328 * We know we can do a rewind because we just did a load, which implies rewind. 2329 * Rewind seems preferable to space backward if we have a virgin tape. 2330 * 2331 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 2332 * error processing, both part of st_interpret_sense. 2333 */ 2334 int 2335 st_touch_tape(st) 2336 struct st_softc *st; 2337 { 2338 char *buf; 2339 int readsize; 2340 int error; 2341 2342 buf = malloc(1024, M_TEMP, M_NOWAIT); 2343 if (buf == NULL) 2344 return (ENOMEM); 2345 2346 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 2347 goto bad; 2348 2349 /* 2350 * If the block size is already known from the 2351 * sense data, use it. Else start probing at 1024. 2352 */ 2353 if (st->media_blksize > 0) 2354 st->blksize = st->media_blksize; 2355 else 2356 st->blksize = 1024; 2357 2358 do { 2359 switch (st->blksize) { 2360 case 512: 2361 case 1024: 2362 readsize = st->blksize; 2363 st->flags |= ST_FIXEDBLOCKS; 2364 break; 2365 default: 2366 readsize = 1; 2367 st->flags &= ~ST_FIXEDBLOCKS; 2368 } 2369 if ((error = st->ops(st, ST_OPS_MODESELECT, XS_CTL_SILENT)) 2370 != 0) { 2371 /* 2372 * The device did not agree with the proposed 2373 * block size. If we exhausted our options, 2374 * return failure, else try another. 2375 */ 2376 if (readsize == 1) 2377 goto bad; 2378 st->blksize -= 512; 2379 continue; 2380 } 2381 st_read(st, buf, readsize, XS_CTL_SILENT); /* XXX */ 2382 if ((error = st_rewind(st, 0, 0)) != 0) { 2383 bad: free(buf, M_TEMP); 2384 return (error); 2385 } 2386 } while (readsize != 1 && readsize > st->blksize); 2387 2388 free(buf, M_TEMP); 2389 return (0); 2390 } 2391 2392 int 2393 stdump(dev, blkno, va, size) 2394 dev_t dev; 2395 daddr_t blkno; 2396 caddr_t va; 2397 size_t size; 2398 { 2399 2400 /* Not implemented. */ 2401 return (ENXIO); 2402 } 2403
Indexes created Fri Sep 26 20:09:58 GMT 2025