st.c revision 1.214
1 /* $NetBSD: st.c,v 1.214 2009/11/23 02:13:47 rmind Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 2004 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Charles M. Hannum. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Originally written by Julian Elischer (julian (at) tfs.com) 34 * for TRW Financial Systems for use under the MACH(2.5) operating system. 35 * 36 * TRW Financial Systems, in accordance with their agreement with Carnegie 37 * Mellon University, makes this software available to CMU to distribute 38 * or use in any manner that they see fit as long as this message is kept with 39 * the software. For this reason TFS also grants any other persons or 40 * organisations permission to use or modify this software. 41 * 42 * TFS supplies this software to be publicly redistributed 43 * on the understanding that TFS is not responsible for the correct 44 * functioning of this software in any circumstances. 45 * 46 * Ported to run under 386BSD by Julian Elischer (julian (at) tfs.com) Sept 1992 47 * major changes by Julian Elischer (julian (at) jules.dialix.oz.au) May 1993 48 * 49 * A lot of rewhacking done by mjacob (mjacob (at) nas.nasa.gov). 50 */ 51 52 #include <sys/cdefs.h> 53 __KERNEL_RCSID(0, "$NetBSD: st.c,v 1.214 2009/11/23 02:13:47 rmind Exp $"); 54 55 #include "opt_scsi.h" 56 57 #include <sys/param.h> 58 #include <sys/systm.h> 59 #include <sys/fcntl.h> 60 #include <sys/errno.h> 61 #include <sys/ioctl.h> 62 #include <sys/malloc.h> 63 #include <sys/buf.h> 64 #include <sys/bufq.h> 65 #include <sys/proc.h> 66 #include <sys/mtio.h> 67 #include <sys/device.h> 68 #include <sys/conf.h> 69 #include <sys/kernel.h> 70 #include <sys/vnode.h> 71 #include <sys/iostat.h> 72 #include <sys/sysctl.h> 73 74 #include <dev/scsipi/scsi_spc.h> 75 #include <dev/scsipi/scsipi_all.h> 76 #include <dev/scsipi/scsi_all.h> 77 #include <dev/scsipi/scsi_tape.h> 78 #include <dev/scsipi/scsipiconf.h> 79 #include <dev/scsipi/scsipi_base.h> 80 #include <dev/scsipi/stvar.h> 81 82 /* Defines for device specific stuff */ 83 #define DEF_FIXED_BSIZE 512 84 85 #define STMODE(z) ( minor(z) & 0x03) 86 #define STDSTY(z) ((minor(z) >> 2) & 0x03) 87 #define STUNIT(z) ((minor(z) >> 4) ) 88 #define STNMINOR 16 89 90 #define NORMAL_MODE 0 91 #define NOREW_MODE 1 92 #define EJECT_MODE 2 93 #define CTRL_MODE 3 94 95 #ifndef ST_MOUNT_DELAY 96 #define ST_MOUNT_DELAY 0 97 #endif 98 99 static dev_type_open(stopen); 100 static dev_type_close(stclose); 101 static dev_type_read(stread); 102 static dev_type_write(stwrite); 103 static dev_type_ioctl(stioctl); 104 static dev_type_strategy(ststrategy); 105 static dev_type_dump(stdump); 106 107 const struct bdevsw st_bdevsw = { 108 stopen, stclose, ststrategy, stioctl, stdump, nosize, D_TAPE 109 }; 110 111 const struct cdevsw st_cdevsw = { 112 stopen, stclose, stread, stwrite, stioctl, 113 nostop, notty, nopoll, nommap, nokqfilter, D_TAPE 114 }; 115 116 /* 117 * Define various devices that we know mis-behave in some way, 118 * and note how they are bad, so we can correct for them 119 */ 120 121 static const struct st_quirk_inquiry_pattern st_quirk_patterns[] = { 122 {{T_SEQUENTIAL, T_REMOV, 123 " ", " ", " "}, {0, 0, { 124 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 125 {ST_Q_FORCE_BLKSIZE, 512, QIC_24}, /* minor 4-7 */ 126 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_1600}, /* minor 8-11 */ 127 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_6250} /* minor 12-15 */ 128 }}}, 129 {{T_SEQUENTIAL, T_REMOV, 130 "TANDBERG", " TDC 3600 ", ""}, {0, 12, { 131 {0, 0, 0}, /* minor 0-3 */ 132 {ST_Q_FORCE_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 133 {0, 0, QIC_150}, /* minor 8-11 */ 134 {0, 0, QIC_120} /* minor 12-15 */ 135 }}}, 136 {{T_SEQUENTIAL, T_REMOV, 137 "TANDBERG", " TDC 3800 ", ""}, {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 {{T_SEQUENTIAL, T_REMOV, 144 "TANDBERG", " SLR5 4/8GB ", ""}, {0, 0, { 145 {ST_Q_FORCE_BLKSIZE, 1024, 0}, /* minor 0-3 */ 146 {0, 0, 0}, /* minor 4-7 */ 147 {0, 0, 0}, /* minor 8-11 */ 148 {0, 0, 0} /* minor 12-15 */ 149 }}}, 150 /* 151 * lacking a manual for the 4200, it's not clear what the 152 * specific density codes should be- the device is a 2.5GB 153 * capable QIC drive, those density codes aren't readily 154 * availabel. The 'default' will just have to do. 155 */ 156 {{T_SEQUENTIAL, T_REMOV, 157 "TANDBERG", " TDC 4200 ", ""}, {0, 0, { 158 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 159 {0, 0, QIC_525}, /* minor 4-7 */ 160 {0, 0, QIC_150}, /* minor 8-11 */ 161 {0, 0, QIC_120} /* minor 12-15 */ 162 }}}, 163 /* 164 * At least -005 and -007 need this. I'll assume they all do unless I 165 * hear otherwise. - mycroft, 31MAR1994 166 */ 167 {{T_SEQUENTIAL, T_REMOV, 168 "ARCHIVE ", "VIPER 2525 25462", ""}, {0, 0, { 169 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 170 {ST_Q_SENSE_HELP, 0, QIC_525}, /* minor 4-7 */ 171 {0, 0, QIC_150}, /* minor 8-11 */ 172 {0, 0, QIC_120} /* minor 12-15 */ 173 }}}, 174 /* 175 * One user reports that this works for his tape drive. It probably 176 * needs more work. - mycroft, 09APR1994 177 */ 178 {{T_SEQUENTIAL, T_REMOV, 179 "SANKYO ", "CP525 ", ""}, {0, 0, { 180 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 181 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 182 {0, 0, QIC_150}, /* minor 8-11 */ 183 {0, 0, QIC_120} /* minor 12-15 */ 184 }}}, 185 {{T_SEQUENTIAL, T_REMOV, 186 "ANRITSU ", "DMT780 ", ""}, {0, 0, { 187 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 188 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 189 {0, 0, QIC_150}, /* minor 8-11 */ 190 {0, 0, QIC_120} /* minor 12-15 */ 191 }}}, 192 {{T_SEQUENTIAL, T_REMOV, 193 "ARCHIVE ", "VIPER 150 21247", ""}, {ST_Q_ERASE_NOIMM, 12, { 194 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 195 {0, 0, QIC_150}, /* minor 4-7 */ 196 {0, 0, QIC_120}, /* minor 8-11 */ 197 {0, 0, QIC_24} /* minor 12-15 */ 198 }}}, 199 {{T_SEQUENTIAL, T_REMOV, 200 "ARCHIVE ", "VIPER 150 21531", ""}, {ST_Q_ERASE_NOIMM, 12, { 201 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 202 {0, 0, QIC_150}, /* minor 4-7 */ 203 {0, 0, QIC_120}, /* minor 8-11 */ 204 {0, 0, QIC_24} /* minor 12-15 */ 205 }}}, 206 {{T_SEQUENTIAL, T_REMOV, 207 "WANGTEK ", "5099ES SCSI", ""}, {0, 0, { 208 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 209 {0, 0, QIC_11}, /* minor 4-7 */ 210 {0, 0, QIC_24}, /* minor 8-11 */ 211 {0, 0, QIC_24} /* minor 12-15 */ 212 }}}, 213 {{T_SEQUENTIAL, T_REMOV, 214 "WANGTEK ", "5150ES SCSI", ""}, {0, 0, { 215 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 216 {0, 0, QIC_24}, /* minor 4-7 */ 217 {0, 0, QIC_120}, /* minor 8-11 */ 218 {0, 0, QIC_150} /* minor 12-15 */ 219 }}}, 220 {{T_SEQUENTIAL, T_REMOV, 221 "WANGTEK ", "5525ES SCSI REV7", ""}, {0, 0, { 222 {0, 0, 0}, /* minor 0-3 */ 223 {ST_Q_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 224 {0, 0, QIC_150}, /* minor 8-11 */ 225 {0, 0, QIC_120} /* minor 12-15 */ 226 }}}, 227 {{T_SEQUENTIAL, T_REMOV, 228 "WangDAT ", "Model 1300 ", ""}, {0, 0, { 229 {0, 0, 0}, /* minor 0-3 */ 230 {ST_Q_FORCE_BLKSIZE, 512, DDS}, /* minor 4-7 */ 231 {ST_Q_FORCE_BLKSIZE, 1024, DDS}, /* minor 8-11 */ 232 {ST_Q_FORCE_BLKSIZE, 0, DDS} /* minor 12-15 */ 233 }}}, 234 {{T_SEQUENTIAL, T_REMOV, 235 "EXABYTE ", "EXB-8200 ", "263H"}, {0, 5, { 236 {0, 0, 0}, /* minor 0-3 */ 237 {0, 0, 0}, /* minor 4-7 */ 238 {0, 0, 0}, /* minor 8-11 */ 239 {0, 0, 0} /* minor 12-15 */ 240 }}}, 241 {{T_SEQUENTIAL, T_REMOV, 242 "STK", "9490", ""}, 243 {ST_Q_FORCE_BLKSIZE, 0, { 244 {0, 0, 0}, /* minor 0-3 */ 245 {0, 0, 0}, /* minor 4-7 */ 246 {0, 0, 0}, /* minor 8-11 */ 247 {0, 0, 0} /* minor 12-15 */ 248 }}}, 249 {{T_SEQUENTIAL, T_REMOV, 250 "STK", "SD-3", ""}, 251 {ST_Q_FORCE_BLKSIZE, 0, { 252 {0, 0, 0}, /* minor 0-3 */ 253 {0, 0, 0}, /* minor 4-7 */ 254 {0, 0, 0}, /* minor 8-11 */ 255 {0, 0, 0} /* minor 12-15 */ 256 }}}, 257 {{T_SEQUENTIAL, T_REMOV, 258 "IBM", "03590", ""}, {ST_Q_IGNORE_LOADS, 0, { 259 {0, 0, 0}, /* minor 0-3 */ 260 {0, 0, 0}, /* minor 4-7 */ 261 {0, 0, 0}, /* minor 8-11 */ 262 {0, 0, 0} /* minor 12-15 */ 263 }}}, 264 {{T_SEQUENTIAL, T_REMOV, 265 "HP ", "T4000s ", ""}, {ST_Q_UNIMODAL, 0, { 266 {0, 0, QIC_3095}, /* minor 0-3 */ 267 {0, 0, QIC_3095}, /* minor 4-7 */ 268 {0, 0, QIC_3095}, /* minor 8-11 */ 269 {0, 0, QIC_3095}, /* minor 12-15 */ 270 }}}, 271 #if 0 272 {{T_SEQUENTIAL, T_REMOV, 273 "EXABYTE ", "EXB-8200 ", ""}, {0, 12, { 274 {0, 0, 0}, /* minor 0-3 */ 275 {0, 0, 0}, /* minor 4-7 */ 276 {0, 0, 0}, /* minor 8-11 */ 277 {0, 0, 0} /* minor 12-15 */ 278 }}}, 279 #endif 280 {{T_SEQUENTIAL, T_REMOV, 281 "TEAC ", "MT-2ST/N50 ", ""}, {ST_Q_IGNORE_LOADS, 0, { 282 {0, 0, 0}, /* minor 0-3 */ 283 {0, 0, 0}, /* minor 4-7 */ 284 {0, 0, 0}, /* minor 8-11 */ 285 {0, 0, 0} /* minor 12-15 */ 286 }}}, 287 {{T_SEQUENTIAL, T_REMOV, 288 "OnStream", "ADR50 Drive", ""}, {ST_Q_UNIMODAL, 0, { 289 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 290 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 4-7 */ 291 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 8-11 */ 292 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 12-15 */ 293 }}}, 294 {{T_SEQUENTIAL, T_REMOV, 295 "OnStream DI-30", "", "1.0"}, {ST_Q_NOFILEMARKS, 0, { 296 {0, 0, 0}, /* minor 0-3 */ 297 {0, 0, 0}, /* minor 4-7 */ 298 {0, 0, 0}, /* minor 8-11 */ 299 {0, 0, 0} /* minor 12-15 */ 300 }}}, 301 {{T_SEQUENTIAL, T_REMOV, 302 "NCR H621", "0-STD-03-46F880 ", ""}, {ST_Q_NOPREVENT, 0, { 303 {0, 0, 0}, /* minor 0-3 */ 304 {0, 0, 0}, /* minor 4-7 */ 305 {0, 0, 0}, /* minor 8-11 */ 306 {0, 0, 0} /* minor 12-15 */ 307 }}}, 308 {{T_SEQUENTIAL, T_REMOV, 309 "Seagate STT3401A", "hp0atxa", ""}, {0, 0, { 310 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 311 {ST_Q_FORCE_BLKSIZE, 1024, 0}, /* minor 4-7 */ 312 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 8-11 */ 313 {ST_Q_FORCE_BLKSIZE, 512, 0} /* minor 12-15 */ 314 }}}, 315 }; 316 317 #define NOEJECT 0 318 #define EJECT 1 319 320 static void st_identify_drive(struct st_softc *, 321 struct scsipi_inquiry_pattern *); 322 static void st_loadquirks(struct st_softc *); 323 static int st_mount_tape(dev_t, int); 324 static void st_unmount(struct st_softc *, boolean); 325 static int st_decide_mode(struct st_softc *, boolean); 326 static void ststart(struct scsipi_periph *); 327 static void strestart(void *); 328 static void stdone(struct scsipi_xfer *, int); 329 static int st_read(struct st_softc *, char *, int, int); 330 static int st_space(struct st_softc *, int, u_int, int); 331 static int st_write_filemarks(struct st_softc *, int, int); 332 static int st_check_eod(struct st_softc *, boolean, int *, int); 333 static int st_load(struct st_softc *, u_int, int); 334 static int st_rewind(struct st_softc *, u_int, int); 335 static int st_interpret_sense(struct scsipi_xfer *); 336 static int st_touch_tape(struct st_softc *); 337 static int st_erase(struct st_softc *, int full, int flags); 338 static int st_rdpos(struct st_softc *, int, u_int32_t *); 339 static int st_setpos(struct st_softc *, int, u_int32_t *); 340 341 static const struct scsipi_periphsw st_switch = { 342 st_interpret_sense, 343 ststart, 344 NULL, 345 stdone 346 }; 347 348 #if defined(ST_ENABLE_EARLYWARN) 349 #define ST_INIT_FLAGS ST_EARLYWARN 350 #else 351 #define ST_INIT_FLAGS 0 352 #endif 353 354 /* 355 * The routine called by the low level scsi routine when it discovers 356 * A device suitable for this driver 357 */ 358 void 359 stattach(device_t parent, struct st_softc *st, void *aux) 360 { 361 struct scsipibus_attach_args *sa = aux; 362 struct scsipi_periph *periph = sa->sa_periph; 363 364 SC_DEBUG(periph, SCSIPI_DB2, ("stattach: ")); 365 366 /* 367 * Store information needed to contact our base driver 368 */ 369 st->sc_periph = periph; 370 periph->periph_dev = &st->sc_dev; 371 periph->periph_switch = &st_switch; 372 373 /* 374 * Set initial flags 375 */ 376 377 st->flags = ST_INIT_FLAGS; 378 379 /* 380 * Set up the buf queue for this device 381 */ 382 bufq_alloc(&st->buf_queue, "fcfs", 0); 383 384 callout_init(&st->sc_callout, 0); 385 386 /* 387 * Check if the drive is a known criminal and take 388 * Any steps needed to bring it into line 389 */ 390 st_identify_drive(st, &sa->sa_inqbuf); 391 /* 392 * Use the subdriver to request information regarding the drive. 393 */ 394 printf("\n"); 395 printf("%s: %s", device_xname(&st->sc_dev), st->quirkdata ? "quirks apply, " : ""); 396 if (scsipi_test_unit_ready(periph, 397 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE) || 398 st->ops(st, ST_OPS_MODESENSE, 399 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE)) 400 printf("drive empty\n"); 401 else { 402 printf("density code %d, ", st->media_density); 403 if (st->media_blksize > 0) 404 printf("%d-byte", st->media_blksize); 405 else 406 printf("variable"); 407 printf(" blocks, write-%s\n", 408 (st->flags & ST_READONLY) ? "protected" : "enabled"); 409 } 410 411 st->stats = iostat_alloc(IOSTAT_TAPE, parent, device_xname(&st->sc_dev)); 412 413 #if NRND > 0 414 rnd_attach_source(&st->rnd_source, device_xname(&st->sc_dev), 415 RND_TYPE_TAPE, 0); 416 #endif 417 } 418 419 int 420 stactivate(device_t self, enum devact act) 421 { 422 int rv = 0; 423 424 switch (act) { 425 case DVACT_ACTIVATE: 426 rv = EOPNOTSUPP; 427 break; 428 429 case DVACT_DEACTIVATE: 430 /* 431 * Nothing to do; we key off the device's DVF_ACTIVE. 432 */ 433 break; 434 } 435 return (rv); 436 } 437 438 int 439 stdetach(device_t self, int flags) 440 { 441 struct st_softc *st = device_private(self); 442 int s, bmaj, cmaj, mn; 443 444 /* locate the major number */ 445 bmaj = bdevsw_lookup_major(&st_bdevsw); 446 cmaj = cdevsw_lookup_major(&st_cdevsw); 447 448 /* kill any pending restart */ 449 callout_stop(&st->sc_callout); 450 451 s = splbio(); 452 453 /* Kill off any queued buffers. */ 454 bufq_drain(st->buf_queue); 455 456 bufq_free(st->buf_queue); 457 458 /* Kill off any pending commands. */ 459 scsipi_kill_pending(st->sc_periph); 460 461 splx(s); 462 463 /* Nuke the vnodes for any open instances */ 464 mn = STUNIT(device_unit(self)); 465 vdevgone(bmaj, mn, mn+STNMINOR-1, VBLK); 466 vdevgone(cmaj, mn, mn+STNMINOR-1, VCHR); 467 468 iostat_free(st->stats); 469 470 #if NRND > 0 471 /* Unhook the entropy source. */ 472 rnd_detach_source(&st->rnd_source); 473 #endif 474 475 return (0); 476 } 477 478 /* 479 * Use the inquiry routine in 'scsi_base' to get drive info so we can 480 * Further tailor our behaviour. 481 */ 482 static void 483 st_identify_drive(struct st_softc *st, struct scsipi_inquiry_pattern *inqbuf) 484 { 485 const struct st_quirk_inquiry_pattern *finger; 486 int priority; 487 488 finger = scsipi_inqmatch(inqbuf, 489 st_quirk_patterns, 490 sizeof(st_quirk_patterns) / sizeof(st_quirk_patterns[0]), 491 sizeof(st_quirk_patterns[0]), &priority); 492 if (priority != 0) { 493 st->quirkdata = &finger->quirkdata; 494 st->drive_quirks = finger->quirkdata.quirks; 495 st->quirks = finger->quirkdata.quirks; /* start value */ 496 st->page_0_size = finger->quirkdata.page_0_size; 497 KASSERT(st->page_0_size <= MAX_PAGE_0_SIZE); 498 st_loadquirks(st); 499 } 500 } 501 502 /* 503 * initialise the subdevices to the default (QUIRK) state. 504 * this will remove any setting made by the system operator or previous 505 * operations. 506 */ 507 static void 508 st_loadquirks(struct st_softc *st) 509 { 510 int i; 511 const struct modes *mode; 512 struct modes *mode2; 513 514 mode = st->quirkdata->modes; 515 mode2 = st->modes; 516 for (i = 0; i < 4; i++) { 517 memset(mode2, 0, sizeof(struct modes)); 518 st->modeflags[i] &= ~(BLKSIZE_SET_BY_QUIRK | 519 DENSITY_SET_BY_QUIRK | BLKSIZE_SET_BY_USER | 520 DENSITY_SET_BY_USER); 521 if ((mode->quirks | st->drive_quirks) & ST_Q_FORCE_BLKSIZE) { 522 mode2->blksize = mode->blksize; 523 st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; 524 } 525 if (mode->density) { 526 mode2->density = mode->density; 527 st->modeflags[i] |= DENSITY_SET_BY_QUIRK; 528 } 529 mode2->quirks |= mode->quirks; 530 mode++; 531 mode2++; 532 } 533 } 534 535 /* 536 * open the device. 537 */ 538 static int 539 stopen(dev_t dev, int flags, int mode, struct lwp *l) 540 { 541 u_int stmode, dsty; 542 int error, sflags, unit, tries, ntries; 543 struct st_softc *st; 544 struct scsipi_periph *periph; 545 struct scsipi_adapter *adapt; 546 547 unit = STUNIT(dev); 548 st = device_lookup_private(&st_cd, unit); 549 if (st == NULL) 550 return (ENXIO); 551 552 stmode = STMODE(dev); 553 dsty = STDSTY(dev); 554 555 periph = st->sc_periph; 556 adapt = periph->periph_channel->chan_adapter; 557 558 SC_DEBUG(periph, SCSIPI_DB1, ("open: dev=0x%"PRIx64" (unit %d (of %d))\n", dev, 559 unit, st_cd.cd_ndevs)); 560 561 562 /* 563 * Only allow one at a time 564 */ 565 if (periph->periph_flags & PERIPH_OPEN) { 566 aprint_error_dev(&st->sc_dev, "already open\n"); 567 return (EBUSY); 568 } 569 570 if ((error = scsipi_adapter_addref(adapt)) != 0) 571 return (error); 572 573 /* 574 * clear any latched errors. 575 */ 576 st->mt_resid = 0; 577 st->mt_erreg = 0; 578 st->asc = 0; 579 st->ascq = 0; 580 581 /* 582 * Catch any unit attention errors. Be silent about this 583 * unless we're already mounted. We ignore media change 584 * if we're in control mode or not mounted yet. 585 */ 586 if ((st->flags & ST_MOUNTED) == 0 || stmode == CTRL_MODE) { 587 #ifdef SCSIDEBUG 588 sflags = XS_CTL_IGNORE_MEDIA_CHANGE; 589 #else 590 sflags = XS_CTL_SILENT|XS_CTL_IGNORE_MEDIA_CHANGE; 591 #endif 592 } else 593 sflags = 0; 594 595 /* 596 * If we're already mounted or we aren't configured for 597 * a mount delay, only try a test unit ready once. Otherwise, 598 * try up to ST_MOUNT_DELAY times with a rest interval of 599 * one second between each try. 600 */ 601 602 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0) { 603 ntries = 1; 604 } else { 605 ntries = ST_MOUNT_DELAY; 606 } 607 608 for (error = tries = 0; tries < ntries; tries++) { 609 int slpintr, oflags; 610 611 /* 612 * If we had no error, or we're opening the control mode 613 * device, we jump out right away. 614 */ 615 616 error = scsipi_test_unit_ready(periph, sflags); 617 if (error == 0 || stmode == CTRL_MODE) { 618 break; 619 } 620 621 /* 622 * We had an error. 623 * 624 * If we're already mounted or we aren't configured for 625 * a mount delay, or the error isn't a NOT READY error, 626 * skip to the error exit now. 627 */ 628 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0 || 629 (st->mt_key != SKEY_NOT_READY)) { 630 goto bad; 631 } 632 633 /* 634 * clear any latched errors. 635 */ 636 st->mt_resid = 0; 637 st->mt_erreg = 0; 638 st->asc = 0; 639 st->ascq = 0; 640 641 /* 642 * Fake that we have the device open so 643 * we block other apps from getting in. 644 */ 645 646 oflags = periph->periph_flags; 647 periph->periph_flags |= PERIPH_OPEN; 648 649 slpintr = tsleep(&lbolt, PUSER|PCATCH, "stload", 0); 650 651 periph->periph_flags = oflags; /* restore flags */ 652 if (slpintr) { 653 goto bad; 654 } 655 } 656 657 658 /* 659 * If the mode is 3 (e.g. minor = 3,7,11,15) then the device has 660 * been opened to set defaults and perform other, usually non-I/O 661 * related, operations. In this case, do a quick check to see 662 * whether the unit actually had a tape loaded (this will be known 663 * as to whether or not we got a NOT READY for the above 664 * unit attention). If a tape is there, go do a mount sequence. 665 */ 666 if (stmode == CTRL_MODE && st->mt_key == SKEY_NOT_READY) { 667 periph->periph_flags |= PERIPH_OPEN; 668 return (0); 669 } 670 671 /* 672 * If we get this far and had an error set, that means we failed 673 * to pass the 'test unit ready' test for the non-controlmode device, 674 * so we bounce the open. 675 */ 676 677 if (error) 678 return (error); 679 680 /* 681 * Else, we're now committed to saying we're open. 682 */ 683 684 periph->periph_flags |= PERIPH_OPEN; /* unit attn are now errors */ 685 686 /* 687 * If it's a different mode, or if the media has been 688 * invalidated, unmount the tape from the previous 689 * session but continue with open processing 690 */ 691 if (st->last_dsty != dsty || 692 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 693 st_unmount(st, NOEJECT); 694 695 /* 696 * If we are not mounted, then we should start a new 697 * mount session. 698 */ 699 if (!(st->flags & ST_MOUNTED)) { 700 if ((error = st_mount_tape(dev, flags)) != 0) 701 goto bad; 702 st->last_dsty = dsty; 703 } 704 if (!(st->quirks & ST_Q_NOPREVENT)) { 705 scsipi_prevent(periph, SPAMR_PREVENT_DT, 706 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 707 } 708 709 SC_DEBUG(periph, SCSIPI_DB2, ("open complete\n")); 710 return (0); 711 712 bad: 713 st_unmount(st, NOEJECT); 714 scsipi_adapter_delref(adapt); 715 periph->periph_flags &= ~PERIPH_OPEN; 716 return (error); 717 } 718 719 /* 720 * close the device.. only called if we are the LAST 721 * occurence of an open device 722 */ 723 static int 724 stclose(dev_t dev, int flags, int mode, struct lwp *l) 725 { 726 int stxx, error = 0; 727 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(dev)); 728 struct scsipi_periph *periph = st->sc_periph; 729 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 730 731 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("closing\n")); 732 733 /* 734 * Make sure that a tape opened in write-only mode will have 735 * file marks written on it when closed, even if not written to. 736 * 737 * This is for SUN compatibility. Actually, the Sun way of 738 * things is to: 739 * 740 * only write filemarks if there are fmks to be written and 741 * - open for write (possibly read/write) 742 * - the last operation was a write 743 * or: 744 * - opened for wronly 745 * - no data was written (including filemarks) 746 */ 747 748 stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); 749 if (((flags & FWRITE) && stxx == ST_WRITTEN) || 750 ((flags & O_ACCMODE) == FWRITE && stxx == 0)) { 751 int nm; 752 error = st_check_eod(st, FALSE, &nm, 0); 753 } 754 755 /* 756 * Allow robots to eject tape if needed. 757 */ 758 scsipi_prevent(periph, SPAMR_ALLOW, 759 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 760 761 switch (STMODE(dev)) { 762 case NORMAL_MODE: 763 st_unmount(st, NOEJECT); 764 break; 765 case NOREW_MODE: 766 case CTRL_MODE: 767 /* 768 * Leave mounted unless media seems to have been removed. 769 * 770 * Otherwise, if we're to terminate a tape with more than one 771 * filemark [ and because we're not rewinding here ], backspace 772 * one filemark so that later appends will see an unbroken 773 * sequence of: 774 * 775 * file - FMK - file - FMK ... file - FMK FMK (EOM) 776 */ 777 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 778 st_unmount(st, NOEJECT); 779 } else if (error == 0) { 780 /* 781 * ST_WRITTEN was preserved from above. 782 * 783 * All we need to know here is: 784 * 785 * Were we writing this tape and was the last 786 * operation a write? 787 * 788 * Are there supposed to be 2FM at EOD? 789 * 790 * If both statements are true, then we backspace 791 * one filemark. 792 */ 793 stxx |= (st->flags & ST_2FM_AT_EOD); 794 if ((flags & FWRITE) != 0 && 795 (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { 796 error = st_space(st, -1, SP_FILEMARKS, 0); 797 } 798 } 799 break; 800 case EJECT_MODE: 801 st_unmount(st, EJECT); 802 break; 803 } 804 805 scsipi_wait_drain(periph); 806 807 scsipi_adapter_delref(adapt); 808 periph->periph_flags &= ~PERIPH_OPEN; 809 810 return (error); 811 } 812 813 /* 814 * Start a new mount session. 815 * Copy in all the default parameters from the selected device mode. 816 * and try guess any that seem to be defaulted. 817 */ 818 static int 819 st_mount_tape(dev_t dev, int flags) 820 { 821 int unit; 822 u_int dsty; 823 struct st_softc *st; 824 struct scsipi_periph *periph; 825 int error = 0; 826 827 unit = STUNIT(dev); 828 dsty = STDSTY(dev); 829 st = device_lookup_private(&st_cd, unit); 830 periph = st->sc_periph; 831 832 if (st->flags & ST_MOUNTED) 833 return (0); 834 835 SC_DEBUG(periph, SCSIPI_DB1, ("mounting\n ")); 836 st->flags |= ST_NEW_MOUNT; 837 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 838 /* 839 * If the media is new, then make sure we give it a chance to 840 * to do a 'load' instruction. (We assume it is new.) 841 */ 842 if ((error = st_load(st, LD_LOAD, XS_CTL_SILENT)) != 0) 843 return (error); 844 /* 845 * Throw another dummy instruction to catch 846 * 'Unit attention' errors. Many drives give 847 * these after doing a Load instruction (with 848 * the MEDIUM MAY HAVE CHANGED asc/ascq). 849 */ 850 scsipi_test_unit_ready(periph, XS_CTL_SILENT); /* XXX */ 851 852 /* 853 * Some devices can't tell you much until they have been 854 * asked to look at the media. This quirk does this. 855 */ 856 if (st->quirks & ST_Q_SENSE_HELP) 857 if ((error = st_touch_tape(st)) != 0) 858 return (error); 859 /* 860 * Load the physical device parameters 861 * loads: blkmin, blkmax 862 */ 863 if ((error = st->ops(st, ST_OPS_RBL, 0)) != 0) 864 return (error); 865 /* 866 * Load the media dependent parameters 867 * includes: media_blksize,media_density,numblks 868 * As we have a tape in, it should be reflected here. 869 * If not you may need the "quirk" above. 870 */ 871 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 872 return (error); 873 /* 874 * If we have gained a permanent density from somewhere, 875 * then use it in preference to the one supplied by 876 * default by the driver. 877 */ 878 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 879 st->density = st->modes[dsty].density; 880 else 881 st->density = st->media_density; 882 /* 883 * If we have gained a permanent blocksize 884 * then use it in preference to the one supplied by 885 * default by the driver. 886 */ 887 st->flags &= ~ST_FIXEDBLOCKS; 888 if (st->modeflags[dsty] & 889 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 890 st->blksize = st->modes[dsty].blksize; 891 if (st->blksize) 892 st->flags |= ST_FIXEDBLOCKS; 893 } else { 894 if ((error = st_decide_mode(st, FALSE)) != 0) 895 return (error); 896 } 897 if ((error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 898 /* ATAPI will return ENODEV for this, and this may be OK */ 899 if (error != ENODEV) { 900 aprint_error_dev(&st->sc_dev, "cannot set selected mode\n"); 901 return (error); 902 } 903 } 904 st->flags &= ~ST_NEW_MOUNT; 905 st->flags |= ST_MOUNTED; 906 periph->periph_flags |= PERIPH_MEDIA_LOADED; /* move earlier? */ 907 st->blkno = st->fileno = (daddr_t) 0; 908 return (0); 909 } 910 911 /* 912 * End the present mount session. 913 * Rewind, and optionally eject the tape. 914 * Reset various flags to indicate that all new 915 * operations require another mount operation 916 */ 917 static void 918 st_unmount(struct st_softc *st, boolean eject) 919 { 920 struct scsipi_periph *periph = st->sc_periph; 921 int nmarks; 922 923 if ((st->flags & ST_MOUNTED) == 0) 924 return; 925 SC_DEBUG(periph, SCSIPI_DB1, ("unmounting\n")); 926 st_check_eod(st, FALSE, &nmarks, XS_CTL_IGNORE_NOT_READY); 927 st_rewind(st, 0, XS_CTL_IGNORE_NOT_READY); 928 929 /* 930 * Section 9.3.3 of the SCSI specs states that a device shall return 931 * the density value specified in the last succesfull MODE SELECT 932 * after an unload operation, in case it is not able to 933 * automatically determine the density of the new medium. 934 * 935 * So we instruct the device to use the default density, which will 936 * prevent the use of stale density values (in particular, 937 * in st_touch_tape(). 938 */ 939 st->density = 0; 940 if (st->ops(st, ST_OPS_MODESELECT, 0) != 0) { 941 aprint_error_dev(&st->sc_dev, "WARNING: cannot revert to default density\n"); 942 } 943 944 if (eject) { 945 if (!(st->quirks & ST_Q_NOPREVENT)) { 946 scsipi_prevent(periph, SPAMR_ALLOW, 947 XS_CTL_IGNORE_ILLEGAL_REQUEST | 948 XS_CTL_IGNORE_NOT_READY); 949 } 950 st_load(st, LD_UNLOAD, XS_CTL_IGNORE_NOT_READY); 951 st->blkno = st->fileno = (daddr_t) -1; 952 } else { 953 st->blkno = st->fileno = (daddr_t) 0; 954 } 955 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 956 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 957 } 958 959 /* 960 * Given all we know about the device, media, mode, 'quirks' and 961 * initial operation, make a decision as to how we should be set 962 * to run (regarding blocking and EOD marks) 963 */ 964 int 965 st_decide_mode(struct st_softc *st, boolean first_read) 966 { 967 968 SC_DEBUG(st->sc_periph, SCSIPI_DB2, ("starting block mode decision\n")); 969 970 /* 971 * If the drive can only handle fixed-length blocks and only at 972 * one size, perhaps we should just do that. 973 */ 974 if (st->blkmin && (st->blkmin == st->blkmax)) { 975 st->flags |= ST_FIXEDBLOCKS; 976 st->blksize = st->blkmin; 977 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 978 ("blkmin == blkmax of %d\n", st->blkmin)); 979 goto done; 980 } 981 /* 982 * If the tape density mandates (or even suggests) use of fixed 983 * or variable-length blocks, comply. 984 */ 985 switch (st->density) { 986 case HALFINCH_800: 987 case HALFINCH_1600: 988 case HALFINCH_6250: 989 case DDS: 990 st->flags &= ~ST_FIXEDBLOCKS; 991 st->blksize = 0; 992 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 993 ("density specified variable\n")); 994 goto done; 995 case QIC_11: 996 case QIC_24: 997 case QIC_120: 998 case QIC_150: 999 case QIC_525: 1000 case QIC_1320: 1001 case QIC_3095: 1002 case QIC_3220: 1003 st->flags |= ST_FIXEDBLOCKS; 1004 if (st->media_blksize > 0) 1005 st->blksize = st->media_blksize; 1006 else 1007 st->blksize = DEF_FIXED_BSIZE; 1008 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1009 ("density specified fixed\n")); 1010 goto done; 1011 } 1012 /* 1013 * If we're about to read the tape, perhaps we should choose 1014 * fixed or variable-length blocks and block size according to 1015 * what the drive found on the tape. 1016 */ 1017 if (first_read && 1018 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 1019 (st->media_blksize == DEF_FIXED_BSIZE) || 1020 (st->media_blksize == 1024))) { 1021 if (st->media_blksize > 0) 1022 st->flags |= ST_FIXEDBLOCKS; 1023 else 1024 st->flags &= ~ST_FIXEDBLOCKS; 1025 st->blksize = st->media_blksize; 1026 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1027 ("Used media_blksize of %d\n", st->media_blksize)); 1028 goto done; 1029 } 1030 /* 1031 * We're getting no hints from any direction. Choose variable- 1032 * length blocks arbitrarily. 1033 */ 1034 st->flags &= ~ST_FIXEDBLOCKS; 1035 st->blksize = 0; 1036 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1037 ("Give up and default to variable mode\n")); 1038 1039 done: 1040 /* 1041 * Decide whether or not to write two file marks to signify end- 1042 * of-data. Make the decision as a function of density. If 1043 * the decision is not to use a second file mark, the SCSI BLANK 1044 * CHECK condition code will be recognized as end-of-data when 1045 * first read. 1046 * (I think this should be a by-product of fixed/variable..julian) 1047 */ 1048 switch (st->density) { 1049 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 1050 case QIC_11: 1051 case QIC_24: 1052 case QIC_120: 1053 case QIC_150: 1054 case QIC_525: 1055 case QIC_1320: 1056 case QIC_3095: 1057 case QIC_3220: 1058 st->flags &= ~ST_2FM_AT_EOD; 1059 break; 1060 default: 1061 st->flags |= ST_2FM_AT_EOD; 1062 } 1063 return (0); 1064 } 1065 1066 /* 1067 * Actually translate the requested transfer into 1068 * one the physical driver can understand 1069 * The transfer is described by a buf and will include 1070 * only one physical transfer. 1071 */ 1072 static void 1073 ststrategy(struct buf *bp) 1074 { 1075 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(bp->b_dev)); 1076 int s; 1077 1078 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1079 ("ststrategy %d bytes @ blk %" PRId64 "\n", bp->b_bcount, bp->b_blkno)); 1080 /* 1081 * If it's a null transfer, return immediately 1082 */ 1083 if (bp->b_bcount == 0) 1084 goto abort; 1085 1086 /* If offset is negative, error */ 1087 if (bp->b_blkno < 0) { 1088 bp->b_error = EINVAL; 1089 goto abort; 1090 } 1091 1092 /* 1093 * Odd sized request on fixed drives are verboten 1094 */ 1095 if (st->flags & ST_FIXEDBLOCKS) { 1096 if (bp->b_bcount % st->blksize) { 1097 aprint_error_dev(&st->sc_dev, "bad request, must be multiple of %d\n", 1098 st->blksize); 1099 bp->b_error = EIO; 1100 goto abort; 1101 } 1102 } 1103 /* 1104 * as are out-of-range requests on variable drives. 1105 */ 1106 else if (bp->b_bcount < st->blkmin || 1107 (st->blkmax && bp->b_bcount > st->blkmax)) { 1108 aprint_error_dev(&st->sc_dev, "bad request, must be between %d and %d\n", 1109 st->blkmin, st->blkmax); 1110 bp->b_error = EIO; 1111 goto abort; 1112 } 1113 s = splbio(); 1114 1115 /* 1116 * Place it in the queue of activities for this tape 1117 * at the end (a bit silly because we only have on user.. 1118 * (but it could fork())) 1119 */ 1120 bufq_put(st->buf_queue, bp); 1121 1122 /* 1123 * Tell the device to get going on the transfer if it's 1124 * not doing anything, otherwise just wait for completion 1125 * (All a bit silly if we're only allowing 1 open but..) 1126 */ 1127 ststart(st->sc_periph); 1128 1129 splx(s); 1130 return; 1131 abort: 1132 /* 1133 * Reset the residue because we didn't do anything, 1134 * and send the buffer back as done. 1135 */ 1136 bp->b_resid = bp->b_bcount; 1137 biodone(bp); 1138 return; 1139 } 1140 1141 /* 1142 * ststart looks to see if there is a buf waiting for the device 1143 * and that the device is not already busy. If both are true, 1144 * It dequeues the buf and creates a scsi command to perform the 1145 * transfer required. The transfer request will call scsipi_done 1146 * on completion, which will in turn call this routine again 1147 * so that the next queued transfer is performed. 1148 * The bufs are queued by the strategy routine (ststrategy) 1149 * 1150 * This routine is also called after other non-queued requests 1151 * have been made of the scsi driver, to ensure that the queue 1152 * continues to be drained. 1153 * ststart() is called at splbio 1154 */ 1155 static void 1156 ststart(struct scsipi_periph *periph) 1157 { 1158 struct st_softc *st = (void *)periph->periph_dev; 1159 struct buf *bp; 1160 struct scsi_rw_tape cmd; 1161 struct scsipi_xfer *xs; 1162 int flags, error; 1163 1164 SC_DEBUG(periph, SCSIPI_DB2, ("ststart ")); 1165 /* 1166 * See if there is a buf to do and we are not already 1167 * doing one 1168 */ 1169 while (periph->periph_active < periph->periph_openings) { 1170 /* if a special awaits, let it proceed first */ 1171 if (periph->periph_flags & PERIPH_WAITING) { 1172 periph->periph_flags &= ~PERIPH_WAITING; 1173 wakeup((void *)periph); 1174 return; 1175 } 1176 1177 /* 1178 * If the device has been unmounted by the user 1179 * then throw away all requests until done. 1180 */ 1181 if (__predict_false((st->flags & ST_MOUNTED) == 0 || 1182 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0)) { 1183 if ((bp = bufq_get(st->buf_queue)) != NULL) { 1184 /* make sure that one implies the other.. */ 1185 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 1186 bp->b_error = EIO; 1187 bp->b_resid = bp->b_bcount; 1188 biodone(bp); 1189 continue; 1190 } else { 1191 return; 1192 } 1193 } 1194 1195 if ((bp = bufq_peek(st->buf_queue)) == NULL) 1196 return; 1197 1198 iostat_busy(st->stats); 1199 1200 /* 1201 * only FIXEDBLOCK devices have pending I/O or space operations. 1202 */ 1203 if (st->flags & ST_FIXEDBLOCKS) { 1204 /* 1205 * If we are at a filemark but have not reported it yet 1206 * then we should report it now 1207 */ 1208 if (st->flags & ST_AT_FILEMARK) { 1209 if ((bp->b_flags & B_READ) == B_WRITE) { 1210 /* 1211 * Handling of ST_AT_FILEMARK in 1212 * st_space will fill in the right file 1213 * mark count. 1214 * Back up over filemark 1215 */ 1216 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1217 bufq_get(st->buf_queue); 1218 bp->b_error = EIO; 1219 bp->b_resid = bp->b_bcount; 1220 biodone(bp); 1221 continue; 1222 } 1223 } else { 1224 bufq_get(st->buf_queue); 1225 bp->b_resid = bp->b_bcount; 1226 bp->b_error = 0; 1227 st->flags &= ~ST_AT_FILEMARK; 1228 biodone(bp); 1229 continue; /* seek more work */ 1230 } 1231 } 1232 } 1233 /* 1234 * If we are at EOM but have not reported it 1235 * yet then we should report it now. 1236 */ 1237 if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { 1238 bufq_get(st->buf_queue); 1239 bp->b_resid = bp->b_bcount; 1240 if (st->flags & ST_EIO_PENDING) 1241 bp->b_error = EIO; 1242 st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); 1243 biodone(bp); 1244 continue; /* seek more work */ 1245 } 1246 1247 /* 1248 * Fill out the scsi command 1249 */ 1250 memset(&cmd, 0, sizeof(cmd)); 1251 flags = XS_CTL_NOSLEEP | XS_CTL_ASYNC; 1252 if ((bp->b_flags & B_READ) == B_WRITE) { 1253 cmd.opcode = WRITE; 1254 st->flags &= ~ST_FM_WRITTEN; 1255 flags |= XS_CTL_DATA_OUT; 1256 } else { 1257 cmd.opcode = READ; 1258 flags |= XS_CTL_DATA_IN; 1259 } 1260 1261 /* 1262 * Handle "fixed-block-mode" tape drives by using the 1263 * block count instead of the length. 1264 */ 1265 if (st->flags & ST_FIXEDBLOCKS) { 1266 cmd.byte2 |= SRW_FIXED; 1267 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1268 } else 1269 _lto3b(bp->b_bcount, cmd.len); 1270 1271 /* 1272 * Clear 'position updated' indicator 1273 */ 1274 st->flags &= ~ST_POSUPDATED; 1275 1276 /* 1277 * go ask the adapter to do all this for us 1278 */ 1279 xs = scsipi_make_xs(periph, 1280 (struct scsipi_generic *)&cmd, sizeof(cmd), 1281 (u_char *)bp->b_data, bp->b_bcount, 1282 0, ST_IO_TIME, bp, flags); 1283 if (__predict_false(xs == NULL)) { 1284 /* 1285 * out of memory. Keep this buffer in the queue, and 1286 * retry later. 1287 */ 1288 callout_reset(&st->sc_callout, hz / 2, strestart, 1289 periph); 1290 return; 1291 } 1292 /* 1293 * need to dequeue the buffer before queuing the command, 1294 * because cdstart may be called recursively from the 1295 * HBA driver 1296 */ 1297 #ifdef DIAGNOSTIC 1298 if (bufq_get(st->buf_queue) != bp) 1299 panic("ststart(): dequeued wrong buf"); 1300 #else 1301 bufq_get(st->buf_queue); 1302 #endif 1303 error = scsipi_execute_xs(xs); 1304 /* with a scsipi_xfer preallocated, scsipi_command can't fail */ 1305 KASSERT(error == 0); 1306 } /* go back and see if we can cram more work in.. */ 1307 } 1308 1309 static void 1310 strestart(void *v) 1311 { 1312 int s = splbio(); 1313 ststart((struct scsipi_periph *)v); 1314 splx(s); 1315 } 1316 1317 1318 static void 1319 stdone(struct scsipi_xfer *xs, int error) 1320 { 1321 struct st_softc *st = (void *)xs->xs_periph->periph_dev; 1322 struct buf *bp = xs->bp; 1323 1324 if (bp) { 1325 bp->b_error = error; 1326 bp->b_resid = xs->resid; 1327 /* 1328 * buggy device ? A SDLT320 can report an info 1329 * field of 0x3de8000 on a Media Error/Write Error 1330 * for this CBD: 0x0a 00 00 80 00 00 1331 */ 1332 if (bp->b_resid > bp->b_bcount || bp->b_resid < 0) 1333 bp->b_resid = bp->b_bcount; 1334 1335 if ((bp->b_flags & B_READ) == B_WRITE) 1336 st->flags |= ST_WRITTEN; 1337 else 1338 st->flags &= ~ST_WRITTEN; 1339 1340 iostat_unbusy(st->stats, bp->b_bcount, 1341 ((bp->b_flags & B_READ) == B_READ)); 1342 1343 #if NRND > 0 1344 rnd_add_uint32(&st->rnd_source, bp->b_blkno); 1345 #endif 1346 1347 if ((st->flags & ST_POSUPDATED) == 0) { 1348 if (error) { 1349 st->fileno = st->blkno = -1; 1350 } else if (st->blkno != -1) { 1351 if (st->flags & ST_FIXEDBLOCKS) 1352 st->blkno += 1353 (bp->b_bcount / st->blksize); 1354 else 1355 st->blkno++; 1356 } 1357 } 1358 1359 biodone(bp); 1360 } 1361 } 1362 1363 static int 1364 stread(dev_t dev, struct uio *uio, int iomode) 1365 { 1366 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(dev)); 1367 1368 return (physio(ststrategy, NULL, dev, B_READ, 1369 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1370 } 1371 1372 static int 1373 stwrite(dev_t dev, struct uio *uio, int iomode) 1374 { 1375 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(dev)); 1376 1377 return (physio(ststrategy, NULL, dev, B_WRITE, 1378 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1379 } 1380 1381 /* 1382 * Perform special action on behalf of the user; 1383 * knows about the internals of this device 1384 */ 1385 static int 1386 stioctl(dev_t dev, u_long cmd, void *arg, int flag, struct lwp *l) 1387 { 1388 int error = 0; 1389 int unit; 1390 int number, nmarks, dsty; 1391 int flags; 1392 struct st_softc *st; 1393 int hold_blksize; 1394 u_int8_t hold_density; 1395 struct mtop *mt = (struct mtop *) arg; 1396 1397 /* 1398 * Find the device that the user is talking about 1399 */ 1400 flags = 0; /* give error messages, act on errors etc. */ 1401 unit = STUNIT(dev); 1402 dsty = STDSTY(dev); 1403 st = device_lookup_private(&st_cd, unit); 1404 hold_blksize = st->blksize; 1405 hold_density = st->density; 1406 1407 switch ((u_int) cmd) { 1408 1409 case MTIOCGET: { 1410 struct mtget *g = (struct mtget *) arg; 1411 /* 1412 * (to get the current state of READONLY) 1413 */ 1414 error = st->ops(st, ST_OPS_MODESENSE, XS_CTL_SILENT); 1415 if (error) { 1416 /* 1417 * Ignore the error if in control mode; 1418 * this is mandated by st(4). 1419 */ 1420 if (STMODE(dev) != CTRL_MODE) 1421 break; 1422 error = 0; 1423 } 1424 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("[ioctl: get status]\n")); 1425 memset(g, 0, sizeof(struct mtget)); 1426 g->mt_type = 0x7; /* Ultrix compat *//*? */ 1427 g->mt_blksiz = st->blksize; 1428 g->mt_density = st->density; 1429 g->mt_mblksiz[0] = st->modes[0].blksize; 1430 g->mt_mblksiz[1] = st->modes[1].blksize; 1431 g->mt_mblksiz[2] = st->modes[2].blksize; 1432 g->mt_mblksiz[3] = st->modes[3].blksize; 1433 g->mt_mdensity[0] = st->modes[0].density; 1434 g->mt_mdensity[1] = st->modes[1].density; 1435 g->mt_mdensity[2] = st->modes[2].density; 1436 g->mt_mdensity[3] = st->modes[3].density; 1437 g->mt_fileno = st->fileno; 1438 g->mt_blkno = st->blkno; 1439 if (st->flags & ST_READONLY) 1440 g->mt_dsreg |= MT_DS_RDONLY; 1441 if (st->flags & ST_MOUNTED) 1442 g->mt_dsreg |= MT_DS_MOUNTED; 1443 g->mt_resid = st->mt_resid; 1444 g->mt_erreg = st->mt_erreg; 1445 /* 1446 * clear latched errors. 1447 */ 1448 st->mt_resid = 0; 1449 st->mt_erreg = 0; 1450 st->asc = 0; 1451 st->ascq = 0; 1452 break; 1453 } 1454 case MTIOCTOP: { 1455 1456 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1457 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1458 mt->mt_count)); 1459 1460 /* compat: in U*x it is a short */ 1461 number = mt->mt_count; 1462 switch ((short) (mt->mt_op)) { 1463 case MTWEOF: /* write an end-of-file record */ 1464 error = st_write_filemarks(st, number, flags); 1465 break; 1466 case MTBSF: /* backward space file */ 1467 number = -number; 1468 case MTFSF: /* forward space file */ 1469 error = st_check_eod(st, FALSE, &nmarks, flags); 1470 if (!error) 1471 error = st_space(st, number - nmarks, 1472 SP_FILEMARKS, flags); 1473 break; 1474 case MTBSR: /* backward space record */ 1475 number = -number; 1476 case MTFSR: /* forward space record */ 1477 error = st_check_eod(st, true, &nmarks, flags); 1478 if (!error) 1479 error = st_space(st, number, SP_BLKS, flags); 1480 break; 1481 case MTREW: /* rewind */ 1482 error = st_rewind(st, 0, flags); 1483 break; 1484 case MTOFFL: /* rewind and put the drive offline */ 1485 st_unmount(st, EJECT); 1486 break; 1487 case MTNOP: /* no operation, sets status only */ 1488 break; 1489 case MTRETEN: /* retension the tape */ 1490 error = st_load(st, LD_RETENSION, flags); 1491 if (!error) 1492 error = st_load(st, LD_LOAD, flags); 1493 break; 1494 case MTEOM: /* forward space to end of media */ 1495 error = st_check_eod(st, FALSE, &nmarks, flags); 1496 if (!error) 1497 error = st_space(st, 1, SP_EOM, flags); 1498 break; 1499 case MTCACHE: /* enable controller cache */ 1500 st->flags &= ~ST_DONTBUFFER; 1501 goto try_new_value; 1502 case MTNOCACHE: /* disable controller cache */ 1503 st->flags |= ST_DONTBUFFER; 1504 goto try_new_value; 1505 case MTERASE: /* erase volume */ 1506 error = st_erase(st, number, flags); 1507 break; 1508 case MTSETBSIZ: /* Set block size for device */ 1509 #ifdef NOTYET 1510 if (!(st->flags & ST_NEW_MOUNT)) { 1511 uprintf("re-mount tape before changing blocksize"); 1512 error = EINVAL; 1513 break; 1514 } 1515 #endif 1516 if (number == 0) 1517 st->flags &= ~ST_FIXEDBLOCKS; 1518 else { 1519 if ((st->blkmin || st->blkmax) && 1520 (number < st->blkmin || 1521 number > st->blkmax)) { 1522 error = EINVAL; 1523 break; 1524 } 1525 st->flags |= ST_FIXEDBLOCKS; 1526 } 1527 st->blksize = number; 1528 st->flags |= ST_BLOCK_SET; /*XXX */ 1529 goto try_new_value; 1530 1531 case MTSETDNSTY: /* Set density for device and mode */ 1532 /* 1533 * Any number >= 0 and <= 0xff is legal. Numbers 1534 * above 0x80 are 'vendor unique'. 1535 */ 1536 if (number < 0 || number > 255) { 1537 error = EINVAL; 1538 break; 1539 } else 1540 st->density = number; 1541 goto try_new_value; 1542 1543 case MTCMPRESS: 1544 error = st->ops(st, (number == 0) ? 1545 ST_OPS_CMPRSS_OFF : ST_OPS_CMPRSS_ON, 1546 XS_CTL_SILENT); 1547 break; 1548 1549 case MTEWARN: 1550 if (number) 1551 st->flags |= ST_EARLYWARN; 1552 else 1553 st->flags &= ~ST_EARLYWARN; 1554 break; 1555 1556 default: 1557 error = EINVAL; 1558 } 1559 break; 1560 } 1561 case MTIOCIEOT: 1562 case MTIOCEEOT: 1563 break; 1564 1565 case MTIOCRDSPOS: 1566 error = st_rdpos(st, 0, (u_int32_t *) arg); 1567 break; 1568 1569 case MTIOCRDHPOS: 1570 error = st_rdpos(st, 1, (u_int32_t *) arg); 1571 break; 1572 1573 case MTIOCSLOCATE: 1574 error = st_setpos(st, 0, (u_int32_t *) arg); 1575 break; 1576 1577 case MTIOCHLOCATE: 1578 error = st_setpos(st, 1, (u_int32_t *) arg); 1579 break; 1580 1581 1582 default: 1583 error = scsipi_do_ioctl(st->sc_periph, dev, cmd, arg, 1584 flag, l); 1585 break; 1586 } 1587 return (error); 1588 /*-----------------------------*/ 1589 try_new_value: 1590 /* 1591 * Check that the mode being asked for is aggreeable to the 1592 * drive. If not, put it back the way it was. 1593 * 1594 * If in control mode, we can make (persistent) mode changes 1595 * even if no medium is loaded (see st(4)). 1596 */ 1597 if ((STMODE(dev) != CTRL_MODE || (st->flags & ST_MOUNTED) != 0) && 1598 (error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 1599 /* put it back as it was */ 1600 aprint_error_dev(&st->sc_dev, "cannot set selected mode\n"); 1601 st->density = hold_density; 1602 st->blksize = hold_blksize; 1603 if (st->blksize) 1604 st->flags |= ST_FIXEDBLOCKS; 1605 else 1606 st->flags &= ~ST_FIXEDBLOCKS; 1607 return (error); 1608 } 1609 /* 1610 * As the drive liked it, if we are setting a new default, 1611 * set it into the structures as such. 1612 * 1613 * The means for deciding this are not finalised yet- but 1614 * if the device was opened in Control Mode, the values 1615 * are persistent now across mounts. 1616 */ 1617 if (STMODE(dev) == CTRL_MODE) { 1618 switch ((short) (mt->mt_op)) { 1619 case MTSETBSIZ: 1620 st->modes[dsty].blksize = st->blksize; 1621 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1622 break; 1623 case MTSETDNSTY: 1624 st->modes[dsty].density = st->density; 1625 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1626 break; 1627 } 1628 } 1629 return (0); 1630 } 1631 1632 /* 1633 * Do a synchronous read. 1634 */ 1635 static int 1636 st_read(struct st_softc *st, char *bf, int size, int flags) 1637 { 1638 struct scsi_rw_tape cmd; 1639 1640 /* 1641 * If it's a null transfer, return immediatly 1642 */ 1643 if (size == 0) 1644 return (0); 1645 memset(&cmd, 0, sizeof(cmd)); 1646 cmd.opcode = READ; 1647 if (st->flags & ST_FIXEDBLOCKS) { 1648 cmd.byte2 |= SRW_FIXED; 1649 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1650 cmd.len); 1651 } else 1652 _lto3b(size, cmd.len); 1653 return (scsipi_command(st->sc_periph, 1654 (void *)&cmd, sizeof(cmd), (void *)bf, size, 0, ST_IO_TIME, NULL, 1655 flags | XS_CTL_DATA_IN)); 1656 } 1657 1658 /* 1659 * issue an erase command 1660 */ 1661 static int 1662 st_erase(struct st_softc *st, int full, int flags) 1663 { 1664 int tmo; 1665 struct scsi_erase cmd; 1666 1667 /* 1668 * Full erase means set LONG bit in erase command, which asks 1669 * the drive to erase the entire unit. Without this bit, we're 1670 * asking the drive to write an erase gap. 1671 */ 1672 memset(&cmd, 0, sizeof(cmd)); 1673 cmd.opcode = ERASE; 1674 if (full) { 1675 cmd.byte2 = SE_LONG; 1676 tmo = ST_SPC_TIME; 1677 } else { 1678 tmo = ST_IO_TIME; 1679 } 1680 1681 /* 1682 * XXX We always do this asynchronously, for now, unless the device 1683 * has the ST_Q_ERASE_NOIMM quirk. How long should we wait if we 1684 * want to (eventually) to it synchronously? 1685 */ 1686 if ((st->quirks & ST_Q_ERASE_NOIMM) == 0) 1687 cmd.byte2 |= SE_IMMED; 1688 1689 return (scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1690 ST_RETRIES, tmo, NULL, flags)); 1691 } 1692 1693 /* 1694 * skip N blocks/filemarks/seq filemarks/eom 1695 */ 1696 static int 1697 st_space(struct st_softc *st, int number, u_int what, int flags) 1698 { 1699 struct scsi_space cmd; 1700 int error; 1701 1702 switch (what) { 1703 case SP_BLKS: 1704 if (st->flags & ST_PER_ACTION) { 1705 if (number > 0) { 1706 st->flags &= ~ST_PER_ACTION; 1707 return (EIO); 1708 } else if (number < 0) { 1709 if (st->flags & ST_AT_FILEMARK) { 1710 /* 1711 * Handling of ST_AT_FILEMARK 1712 * in st_space will fill in the 1713 * right file mark count. 1714 */ 1715 error = st_space(st, 0, SP_FILEMARKS, 1716 flags); 1717 if (error) 1718 return (error); 1719 } 1720 if (st->flags & ST_BLANK_READ) { 1721 st->flags &= ~ST_BLANK_READ; 1722 return (EIO); 1723 } 1724 st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); 1725 } 1726 } 1727 break; 1728 case SP_FILEMARKS: 1729 if (st->flags & ST_EIO_PENDING) { 1730 if (number > 0) { 1731 /* pretend we just discovered the error */ 1732 st->flags &= ~ST_EIO_PENDING; 1733 return (EIO); 1734 } else if (number < 0) { 1735 /* back away from the error */ 1736 st->flags &= ~ST_EIO_PENDING; 1737 } 1738 } 1739 if (st->flags & ST_AT_FILEMARK) { 1740 st->flags &= ~ST_AT_FILEMARK; 1741 number--; 1742 } 1743 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 1744 /* back away from unwritten tape */ 1745 st->flags &= ~ST_BLANK_READ; 1746 number++; /* XXX dubious */ 1747 } 1748 break; 1749 case SP_EOM: 1750 if (st->flags & ST_EOM_PENDING) { 1751 /* we're already there */ 1752 st->flags &= ~ST_EOM_PENDING; 1753 return (0); 1754 } 1755 if (st->flags & ST_EIO_PENDING) { 1756 /* pretend we just discovered the error */ 1757 st->flags &= ~ST_EIO_PENDING; 1758 return (EIO); 1759 } 1760 if (st->flags & ST_AT_FILEMARK) 1761 st->flags &= ~ST_AT_FILEMARK; 1762 break; 1763 } 1764 if (number == 0) 1765 return (0); 1766 1767 memset(&cmd, 0, sizeof(cmd)); 1768 cmd.opcode = SPACE; 1769 cmd.byte2 = what; 1770 _lto3b(number, cmd.number); 1771 1772 st->flags &= ~ST_POSUPDATED; 1773 st->last_ctl_resid = 0; 1774 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1775 0, ST_SPC_TIME, NULL, flags); 1776 1777 if (error == 0 && (st->flags & ST_POSUPDATED) == 0) { 1778 number = number - st->last_ctl_resid; 1779 if (what == SP_BLKS) { 1780 if (st->blkno != -1) { 1781 st->blkno += number; 1782 } 1783 } else if (what == SP_FILEMARKS) { 1784 if (st->fileno != -1) { 1785 st->fileno += number; 1786 if (number > 0) { 1787 st->blkno = 0; 1788 } else if (number < 0) { 1789 st->blkno = -1; 1790 } 1791 } 1792 } else if (what == SP_EOM) { 1793 /* 1794 * This loses us relative position. 1795 */ 1796 st->fileno = st->blkno = -1; 1797 } 1798 } 1799 return (error); 1800 } 1801 1802 /* 1803 * write N filemarks 1804 */ 1805 static int 1806 st_write_filemarks(struct st_softc *st, int number, int flags) 1807 { 1808 int error; 1809 struct scsi_write_filemarks cmd; 1810 1811 /* 1812 * It's hard to write a negative number of file marks. 1813 * Don't try. 1814 */ 1815 if (number < 0) 1816 return (EINVAL); 1817 switch (number) { 1818 case 0: /* really a command to sync the drive's buffers */ 1819 break; 1820 case 1: 1821 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 1822 st->flags &= ~ST_WRITTEN; 1823 else 1824 st->flags |= ST_FM_WRITTEN; 1825 st->flags &= ~ST_PER_ACTION; 1826 break; 1827 default: 1828 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 1829 } 1830 1831 memset(&cmd, 0, sizeof(cmd)); 1832 cmd.opcode = WRITE_FILEMARKS; 1833 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1834 cmd.byte2 = SR_IMMED; 1835 /* 1836 * The ATAPI Onstream DI-30 doesn't support writing filemarks, but 1837 * WRITE_FILEMARKS is still used to flush the buffer 1838 */ 1839 if ((st->quirks & ST_Q_NOFILEMARKS) == 0) 1840 _lto3b(number, cmd.number); 1841 1842 /* XXX WE NEED TO BE ABLE TO GET A RESIDIUAL XXX */ 1843 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1844 0, ST_IO_TIME * 4, NULL, flags); 1845 if (error == 0 && st->fileno != -1) { 1846 st->fileno += number; 1847 } 1848 return (error); 1849 } 1850 1851 /* 1852 * Make sure the right number of file marks is on tape if the 1853 * tape has been written. If the position argument is true, 1854 * leave the tape positioned where it was originally. 1855 * 1856 * nmarks returns the number of marks to skip (or, if position 1857 * true, which were skipped) to get back original position. 1858 */ 1859 static int 1860 st_check_eod(struct st_softc *st, boolean position, int *nmarks, int flags) 1861 { 1862 int error; 1863 1864 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 1865 default: 1866 *nmarks = 0; 1867 return (0); 1868 case ST_WRITTEN: 1869 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 1870 *nmarks = 1; 1871 break; 1872 case ST_WRITTEN | ST_2FM_AT_EOD: 1873 *nmarks = 2; 1874 } 1875 error = st_write_filemarks(st, *nmarks, flags); 1876 if (position && !error) 1877 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 1878 return (error); 1879 } 1880 1881 /* 1882 * load/unload/retension 1883 */ 1884 static int 1885 st_load(struct st_softc *st, u_int type, int flags) 1886 { 1887 int error; 1888 struct scsi_load cmd; 1889 1890 if (type != LD_LOAD) { 1891 int nmarks; 1892 1893 error = st_check_eod(st, FALSE, &nmarks, flags); 1894 if (error) { 1895 aprint_error_dev(&st->sc_dev, "failed to write closing filemarks at " 1896 "unload, errno=%d\n", error); 1897 return (error); 1898 } 1899 } 1900 if (st->quirks & ST_Q_IGNORE_LOADS) { 1901 if (type == LD_LOAD) { 1902 /* 1903 * If we ignore loads, at least we should try a rewind. 1904 */ 1905 return st_rewind(st, 0, flags); 1906 } 1907 /* otherwise, we should do what's asked of us */ 1908 } 1909 1910 memset(&cmd, 0, sizeof(cmd)); 1911 cmd.opcode = LOAD; 1912 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1913 cmd.byte2 = SR_IMMED; 1914 cmd.how = type; 1915 1916 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1917 ST_RETRIES, ST_SPC_TIME, NULL, flags); 1918 if (error) { 1919 aprint_error_dev(&st->sc_dev, "error %d in st_load (op %d)\n", 1920 error, type); 1921 } 1922 return (error); 1923 } 1924 1925 /* 1926 * Rewind the device 1927 */ 1928 static int 1929 st_rewind(struct st_softc *st, u_int immediate, int flags) 1930 { 1931 struct scsi_rewind cmd; 1932 int error; 1933 int nmarks; 1934 int timeout; 1935 1936 error = st_check_eod(st, FALSE, &nmarks, flags); 1937 if (error) { 1938 aprint_error_dev(&st->sc_dev, "failed to write closing filemarks at " 1939 "rewind, errno=%d\n", error); 1940 return (error); 1941 } 1942 st->flags &= ~ST_PER_ACTION; 1943 1944 /* If requestor asked for immediate response, set a short timeout */ 1945 timeout = immediate ? ST_CTL_TIME : ST_SPC_TIME; 1946 1947 /* 1948 * ATAPI tapes always need immediate to be set 1949 */ 1950 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1951 immediate = SR_IMMED; 1952 1953 memset(&cmd, 0, sizeof(cmd)); 1954 cmd.opcode = REWIND; 1955 cmd.byte2 = immediate; 1956 1957 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1958 ST_RETRIES, timeout, NULL, flags); 1959 if (error) { 1960 aprint_error_dev(&st->sc_dev, "error %d trying to rewind\n", 1961 error); 1962 /* lost position */ 1963 st->fileno = st->blkno = -1; 1964 } else { 1965 st->fileno = st->blkno = 0; 1966 } 1967 return (error); 1968 } 1969 1970 static int 1971 st_rdpos(struct st_softc *st, int hard, u_int32_t *blkptr) 1972 { 1973 int error; 1974 u_int8_t posdata[20]; 1975 struct scsi_tape_read_position cmd; 1976 1977 /* 1978 * We try and flush any buffered writes here if we were writing 1979 * and we're trying to get hardware block position. It eats 1980 * up performance substantially, but I'm wary of drive firmware. 1981 * 1982 * I think that *logical* block position is probably okay- 1983 * but hardware block position might have to wait for data 1984 * to hit media to be valid. Caveat Emptor. 1985 */ 1986 1987 if (hard && (st->flags & ST_WRITTEN)) { 1988 /* 1989 * First flush any pending writes... 1990 */ 1991 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 1992 /* 1993 * The latter case is for 'write protected' tapes 1994 * which are too stupid to recognize a zero count 1995 * for writing filemarks as a no-op. 1996 */ 1997 if (error != 0 && error != EACCES && error != EROFS) 1998 return (error); 1999 } 2000 2001 memset(&cmd, 0, sizeof(cmd)); 2002 memset(&posdata, 0, sizeof(posdata)); 2003 cmd.opcode = READ_POSITION; 2004 if (hard) 2005 cmd.byte1 = 1; 2006 2007 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 2008 (void *)&posdata, sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, 2009 XS_CTL_SILENT | XS_CTL_DATA_IN); 2010 2011 if (error == 0) { 2012 #if 0 2013 printf("posdata:"); 2014 for (hard = 0; hard < sizeof(posdata); hard++) 2015 printf("%02x ", posdata[hard] & 0xff); 2016 printf("\n"); 2017 #endif 2018 if (posdata[0] & 0x4) /* Block Position Unknown */ 2019 error = EINVAL; 2020 else 2021 *blkptr = _4btol(&posdata[4]); 2022 } 2023 return (error); 2024 } 2025 2026 static int 2027 st_setpos(struct st_softc *st, int hard, u_int32_t *blkptr) 2028 { 2029 int error; 2030 struct scsi_tape_locate cmd; 2031 2032 /* 2033 * We used to try and flush any buffered writes here. 2034 * Now we push this onto user applications to either 2035 * flush the pending writes themselves (via a zero count 2036 * WRITE FILEMARKS command) or they can trust their tape 2037 * drive to do this correctly for them. 2038 * 2039 * There are very ugly performance limitations otherwise. 2040 */ 2041 2042 memset(&cmd, 0, sizeof(cmd)); 2043 cmd.opcode = LOCATE; 2044 if (hard) 2045 cmd.byte2 = 1 << 2; 2046 _lto4b(*blkptr, cmd.blkaddr); 2047 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 2048 ST_RETRIES, ST_SPC_TIME, NULL, 0); 2049 /* 2050 * Note file && block number position now unknown (if 2051 * these things ever start being maintained in this driver) 2052 */ 2053 st->fileno = st->blkno = -1; 2054 return (error); 2055 } 2056 2057 2058 /* 2059 * Look at the returned sense and act on the error and determine 2060 * the unix error number to pass back..., 0 (== report no error), 2061 * -1 = retry the operation, -2 continue error processing. 2062 */ 2063 static int 2064 st_interpret_sense(struct scsipi_xfer *xs) 2065 { 2066 struct scsipi_periph *periph = xs->xs_periph; 2067 struct scsi_sense_data *sense = &xs->sense.scsi_sense; 2068 struct buf *bp = xs->bp; 2069 struct st_softc *st = (void *)periph->periph_dev; 2070 int retval = EJUSTRETURN; 2071 int doprint = ((xs->xs_control & XS_CTL_SILENT) == 0); 2072 u_int8_t key; 2073 int32_t info; 2074 2075 /* 2076 * If it isn't a extended or extended/deferred error, let 2077 * the generic code handle it. 2078 */ 2079 if (SSD_RCODE(sense->response_code) != SSD_RCODE_CURRENT && 2080 SSD_RCODE(sense->response_code) != SSD_RCODE_DEFERRED) 2081 return (retval); 2082 2083 if (sense->response_code & SSD_RCODE_VALID) 2084 info = _4btol(sense->info); 2085 else 2086 info = (st->flags & ST_FIXEDBLOCKS) ? 2087 xs->datalen / st->blksize : xs->datalen; 2088 key = SSD_SENSE_KEY(sense->flags); 2089 st->mt_erreg = key; 2090 st->asc = sense->asc; 2091 st->ascq = sense->ascq; 2092 st->mt_resid = (short) info; 2093 2094 if (key == SKEY_NOT_READY && st->asc == 0x4 && st->ascq == 0x1) { 2095 /* Not Ready, Logical Unit Is in Process Of Becoming Ready */ 2096 if (!callout_pending(&periph->periph_callout)) 2097 scsipi_periph_freeze(periph, 1); 2098 callout_reset(&periph->periph_callout, 2099 hz, scsipi_periph_timed_thaw, periph); 2100 return (ERESTART); 2101 } 2102 2103 /* 2104 * If the device is not open yet, let generic handle 2105 */ 2106 if ((periph->periph_flags & PERIPH_OPEN) == 0) { 2107 return (retval); 2108 } 2109 2110 xs->resid = info; 2111 if (st->flags & ST_FIXEDBLOCKS) { 2112 if (bp) { 2113 xs->resid *= st->blksize; 2114 st->last_io_resid = xs->resid; 2115 } else { 2116 st->last_ctl_resid = xs->resid; 2117 } 2118 if (key == SKEY_VOLUME_OVERFLOW) { 2119 st->flags |= ST_EIO_PENDING; 2120 if (bp) 2121 bp->b_resid = xs->resid; 2122 } else if (sense->flags & SSD_EOM) { 2123 if ((st->flags & ST_EARLYWARN) == 0) 2124 st->flags |= ST_EIO_PENDING; 2125 st->flags |= ST_EOM_PENDING; 2126 if (bp) { 2127 #if 0 2128 bp->b_resid = xs->resid; 2129 #else 2130 /* 2131 * Grotesque as it seems, the few times 2132 * I've actually seen a non-zero resid, 2133 * the tape drive actually lied and had 2134 * written all the data! 2135 */ 2136 bp->b_resid = 0; 2137 #endif 2138 } 2139 } 2140 if (sense->flags & SSD_FILEMARK) { 2141 st->flags |= ST_AT_FILEMARK; 2142 if (bp) 2143 bp->b_resid = xs->resid; 2144 if (st->fileno != (daddr_t) -1) { 2145 st->fileno++; 2146 st->blkno = 0; 2147 st->flags |= ST_POSUPDATED; 2148 } 2149 } 2150 if (sense->flags & SSD_ILI) { 2151 st->flags |= ST_EIO_PENDING; 2152 if (bp) 2153 bp->b_resid = xs->resid; 2154 if (sense->response_code & SSD_RCODE_VALID && 2155 (xs->xs_control & XS_CTL_SILENT) == 0) 2156 aprint_error_dev(&st->sc_dev, "block wrong size, %d blocks " 2157 "residual\n", info); 2158 2159 /* 2160 * This quirk code helps the drive read 2161 * the first tape block, regardless of 2162 * format. That is required for these 2163 * drives to return proper MODE SENSE 2164 * information. 2165 */ 2166 if ((st->quirks & ST_Q_SENSE_HELP) && 2167 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 2168 st->blksize -= 512; 2169 else if ((st->flags & ST_POSUPDATED) == 0) { 2170 if (st->blkno != (daddr_t) -1) { 2171 st->blkno += 2172 (xs->datalen / st->blksize); 2173 st->flags |= ST_POSUPDATED; 2174 } 2175 } 2176 } 2177 /* 2178 * If data wanted and no data was transferred, do it immediately 2179 */ 2180 if (xs->datalen && xs->resid >= xs->datalen) { 2181 if (st->flags & ST_EIO_PENDING) 2182 return (EIO); 2183 if (st->flags & ST_AT_FILEMARK) { 2184 if (bp) 2185 bp->b_resid = xs->resid; 2186 return (0); 2187 } 2188 } 2189 } else { /* must be variable mode */ 2190 if (bp) { 2191 st->last_io_resid = xs->resid; 2192 } else { 2193 st->last_ctl_resid = xs->resid; 2194 } 2195 if (sense->flags & SSD_EOM) { 2196 /* 2197 * The current semantics of this 2198 * driver requires EOM detection 2199 * to return EIO unless early 2200 * warning detection is enabled 2201 * for variable mode (this is always 2202 * on for fixed block mode). 2203 */ 2204 if (st->flags & ST_EARLYWARN) { 2205 st->flags |= ST_EOM_PENDING; 2206 retval = 0; 2207 } else { 2208 retval = EIO; 2209 /* 2210 * If we return an error we can't claim to 2211 * have transfered all data. 2212 */ 2213 if (xs->resid == 0) 2214 xs->resid = xs->datalen; 2215 } 2216 2217 /* 2218 * If it's an unadorned EOM detection, 2219 * suppress printing an error. 2220 */ 2221 if (key == SKEY_NO_SENSE) { 2222 doprint = 0; 2223 } 2224 } else if (sense->flags & SSD_FILEMARK) { 2225 retval = 0; 2226 if (st->fileno != (daddr_t) -1) { 2227 st->fileno++; 2228 st->blkno = 0; 2229 st->flags |= ST_POSUPDATED; 2230 } 2231 } else if (sense->flags & SSD_ILI) { 2232 if (info < 0) { 2233 /* 2234 * The tape record was bigger than the read 2235 * we issued. 2236 */ 2237 if ((xs->xs_control & XS_CTL_SILENT) == 0) { 2238 aprint_error_dev(&st->sc_dev, 2239 "%d-byte tape record too big" 2240 " for %d-byte user buffer\n", 2241 xs->datalen - info, xs->datalen); 2242 } 2243 retval = EIO; 2244 } else { 2245 retval = 0; 2246 if (st->blkno != (daddr_t) -1) { 2247 st->blkno++; 2248 st->flags |= ST_POSUPDATED; 2249 } 2250 } 2251 } 2252 if (bp) 2253 bp->b_resid = xs->resid; 2254 } 2255 2256 #ifndef SCSIPI_DEBUG 2257 if (retval == 0 && key == SKEY_NO_SENSE) 2258 doprint = 0; 2259 #endif 2260 if (key == SKEY_BLANK_CHECK) { 2261 /* 2262 * This quirk code helps the drive read the 2263 * first tape block, regardless of format. That 2264 * is required for these drives to return proper 2265 * MODE SENSE information. 2266 */ 2267 if ((st->quirks & ST_Q_SENSE_HELP) && 2268 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 2269 /* still starting */ 2270 st->blksize -= 512; 2271 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 2272 st->flags |= ST_BLANK_READ; 2273 xs->resid = xs->datalen; 2274 if (bp) { 2275 bp->b_resid = xs->resid; 2276 /* return an EOF */ 2277 } 2278 retval = 0; 2279 /* lost position */ 2280 st->fileno = st->blkno = -1; 2281 } 2282 } 2283 2284 /* 2285 * If generic sense processing will continue, we should not 2286 * print sense info here. 2287 */ 2288 if (retval == EJUSTRETURN) 2289 doprint = 0; 2290 2291 if (doprint) { 2292 #ifdef SCSIVERBOSE 2293 scsipi_print_sense(xs, 0); 2294 #else 2295 scsipi_printaddr(periph); 2296 printf("Sense Key 0x%02x", key); 2297 if ((sense->response_code & SSD_RCODE_VALID) != 0) { 2298 switch (key) { 2299 case SKEY_NOT_READY: 2300 case SKEY_ILLEGAL_REQUEST: 2301 case SKEY_UNIT_ATTENTION: 2302 case SKEY_DATA_PROTECT: 2303 break; 2304 case SKEY_VOLUME_OVERFLOW: 2305 case SKEY_BLANK_CHECK: 2306 printf(", requested size: %d (decimal)", info); 2307 break; 2308 case SKEY_ABORTED_COMMAND: 2309 if (xs->xs_retries) 2310 printf(", retrying"); 2311 printf(", cmd 0x%x, info 0x%x", 2312 xs->cmd->opcode, info); 2313 break; 2314 default: 2315 printf(", info = %d (decimal)", info); 2316 } 2317 } 2318 if (sense->extra_len != 0) { 2319 int n; 2320 printf(", data ="); 2321 for (n = 0; n < sense->extra_len; n++) 2322 printf(" %02x", sense->csi[n]); 2323 } 2324 printf("\n"); 2325 #endif 2326 } 2327 return (retval); 2328 } 2329 2330 /* 2331 * The quirk here is that the drive returns some value to st_mode_sense 2332 * incorrectly until the tape has actually passed by the head. 2333 * 2334 * The method is to set the drive to large fixed-block state (user-specified 2335 * density and 1024-byte blocks), then read and rewind to get it to sense the 2336 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 2337 * work, as a last resort, try variable- length blocks. The result will be 2338 * the ability to do an accurate st_mode_sense. 2339 * 2340 * We know we can do a rewind because we just did a load, which implies rewind. 2341 * Rewind seems preferable to space backward if we have a virgin tape. 2342 * 2343 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 2344 * error processing, both part of st_interpret_sense. 2345 */ 2346 static int 2347 st_touch_tape(struct st_softc *st) 2348 { 2349 char *bf; 2350 int readsize; 2351 int error; 2352 2353 bf = malloc(1024, M_TEMP, M_NOWAIT); 2354 if (bf == NULL) 2355 return (ENOMEM); 2356 2357 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 2358 goto bad; 2359 2360 /* 2361 * If the block size is already known from the 2362 * sense data, use it. Else start probing at 1024. 2363 */ 2364 if (st->media_blksize > 0) 2365 st->blksize = st->media_blksize; 2366 else 2367 st->blksize = 1024; 2368 2369 do { 2370 switch (st->blksize) { 2371 case 512: 2372 case 1024: 2373 readsize = st->blksize; 2374 st->flags |= ST_FIXEDBLOCKS; 2375 break; 2376 default: 2377 readsize = 1; 2378 st->flags &= ~ST_FIXEDBLOCKS; 2379 } 2380 if ((error = st->ops(st, ST_OPS_MODESELECT, XS_CTL_SILENT)) 2381 != 0) { 2382 /* 2383 * The device did not agree with the proposed 2384 * block size. If we exhausted our options, 2385 * return failure, else try another. 2386 */ 2387 if (readsize == 1) 2388 goto bad; 2389 st->blksize -= 512; 2390 continue; 2391 } 2392 st_read(st, bf, readsize, XS_CTL_SILENT); /* XXX */ 2393 if ((error = st_rewind(st, 0, 0)) != 0) { 2394 bad: free(bf, M_TEMP); 2395 return (error); 2396 } 2397 } while (readsize != 1 && readsize > st->blksize); 2398 2399 free(bf, M_TEMP); 2400 return (0); 2401 } 2402 2403 static int 2404 stdump(dev_t dev, daddr_t blkno, void *va, 2405 size_t size) 2406 { 2407 2408 /* Not implemented. */ 2409 return (ENXIO); 2410 } 2411 2412 /* 2413 * Send a filled out parameter structure to the drive to 2414 * set it into the desire modes etc. 2415 */ 2416 int 2417 st_mode_select(struct st_softc *st, int flags) 2418 { 2419 u_int select_len; 2420 struct select { 2421 struct scsi_mode_parameter_header_6 header; 2422 struct scsi_general_block_descriptor blk_desc; 2423 u_char sense_data[MAX_PAGE_0_SIZE]; 2424 } select; 2425 struct scsipi_periph *periph = st->sc_periph; 2426 2427 select_len = sizeof(select.header) + sizeof(select.blk_desc) + 2428 st->page_0_size; 2429 2430 /* 2431 * This quirk deals with drives that have only one valid mode 2432 * and think this gives them license to reject all mode selects, 2433 * even if the selected mode is the one that is supported. 2434 */ 2435 if (st->quirks & ST_Q_UNIMODAL) { 2436 SC_DEBUG(periph, SCSIPI_DB3, 2437 ("not setting density 0x%x blksize 0x%x\n", 2438 st->density, st->blksize)); 2439 return (0); 2440 } 2441 2442 /* 2443 * Set up for a mode select 2444 */ 2445 memset(&select, 0, sizeof(select)); 2446 select.header.blk_desc_len = sizeof(struct scsi_general_block_descriptor); 2447 select.header.dev_spec &= ~SMH_DSP_BUFF_MODE; 2448 select.blk_desc.density = st->density; 2449 if (st->flags & ST_DONTBUFFER) 2450 select.header.dev_spec |= SMH_DSP_BUFF_MODE_OFF; 2451 else 2452 select.header.dev_spec |= SMH_DSP_BUFF_MODE_ON; 2453 if (st->flags & ST_FIXEDBLOCKS) 2454 _lto3b(st->blksize, select.blk_desc.blklen); 2455 if (st->page_0_size) 2456 memcpy(select.sense_data, st->sense_data, st->page_0_size); 2457 2458 /* 2459 * do the command 2460 */ 2461 return scsipi_mode_select(periph, 0, &select.header, select_len, 2462 flags, ST_RETRIES, ST_CTL_TIME); 2463 } 2464
Indexes created Fri Sep 26 20:09:58 GMT 2025