st.c revision 1.213
1 /* $NetBSD: st.c,v 1.213 2009/10/21 21:12:06 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 1.213 2009/10/21 21:12:06 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/user.h> 67 #include <sys/mtio.h> 68 #include <sys/device.h> 69 #include <sys/conf.h> 70 #include <sys/kernel.h> 71 #include <sys/vnode.h> 72 #include <sys/iostat.h> 73 #include <sys/sysctl.h> 74 75 #include <dev/scsipi/scsi_spc.h> 76 #include <dev/scsipi/scsipi_all.h> 77 #include <dev/scsipi/scsi_all.h> 78 #include <dev/scsipi/scsi_tape.h> 79 #include <dev/scsipi/scsipiconf.h> 80 #include <dev/scsipi/scsipi_base.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 #ifndef ST_MOUNT_DELAY 97 #define ST_MOUNT_DELAY 0 98 #endif 99 100 static dev_type_open(stopen); 101 static dev_type_close(stclose); 102 static dev_type_read(stread); 103 static dev_type_write(stwrite); 104 static dev_type_ioctl(stioctl); 105 static dev_type_strategy(ststrategy); 106 static dev_type_dump(stdump); 107 108 const struct bdevsw st_bdevsw = { 109 stopen, stclose, ststrategy, stioctl, stdump, nosize, D_TAPE 110 }; 111 112 const struct cdevsw st_cdevsw = { 113 stopen, stclose, stread, stwrite, stioctl, 114 nostop, notty, nopoll, nommap, nokqfilter, D_TAPE 115 }; 116 117 /* 118 * Define various devices that we know mis-behave in some way, 119 * and note how they are bad, so we can correct for them 120 */ 121 122 static const struct st_quirk_inquiry_pattern st_quirk_patterns[] = { 123 {{T_SEQUENTIAL, T_REMOV, 124 " ", " ", " "}, {0, 0, { 125 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 126 {ST_Q_FORCE_BLKSIZE, 512, QIC_24}, /* minor 4-7 */ 127 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_1600}, /* minor 8-11 */ 128 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_6250} /* minor 12-15 */ 129 }}}, 130 {{T_SEQUENTIAL, T_REMOV, 131 "TANDBERG", " TDC 3600 ", ""}, {0, 12, { 132 {0, 0, 0}, /* minor 0-3 */ 133 {ST_Q_FORCE_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 134 {0, 0, QIC_150}, /* minor 8-11 */ 135 {0, 0, QIC_120} /* minor 12-15 */ 136 }}}, 137 {{T_SEQUENTIAL, T_REMOV, 138 "TANDBERG", " TDC 3800 ", ""}, {0, 0, { 139 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 140 {0, 0, QIC_525}, /* minor 4-7 */ 141 {0, 0, QIC_150}, /* minor 8-11 */ 142 {0, 0, QIC_120} /* minor 12-15 */ 143 }}}, 144 {{T_SEQUENTIAL, T_REMOV, 145 "TANDBERG", " SLR5 4/8GB ", ""}, {0, 0, { 146 {ST_Q_FORCE_BLKSIZE, 1024, 0}, /* minor 0-3 */ 147 {0, 0, 0}, /* minor 4-7 */ 148 {0, 0, 0}, /* minor 8-11 */ 149 {0, 0, 0} /* minor 12-15 */ 150 }}}, 151 /* 152 * lacking a manual for the 4200, it's not clear what the 153 * specific density codes should be- the device is a 2.5GB 154 * capable QIC drive, those density codes aren't readily 155 * availabel. The 'default' will just have to do. 156 */ 157 {{T_SEQUENTIAL, T_REMOV, 158 "TANDBERG", " TDC 4200 ", ""}, {0, 0, { 159 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 160 {0, 0, QIC_525}, /* minor 4-7 */ 161 {0, 0, QIC_150}, /* minor 8-11 */ 162 {0, 0, QIC_120} /* minor 12-15 */ 163 }}}, 164 /* 165 * At least -005 and -007 need this. I'll assume they all do unless I 166 * hear otherwise. - mycroft, 31MAR1994 167 */ 168 {{T_SEQUENTIAL, T_REMOV, 169 "ARCHIVE ", "VIPER 2525 25462", ""}, {0, 0, { 170 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 171 {ST_Q_SENSE_HELP, 0, QIC_525}, /* minor 4-7 */ 172 {0, 0, QIC_150}, /* minor 8-11 */ 173 {0, 0, QIC_120} /* minor 12-15 */ 174 }}}, 175 /* 176 * One user reports that this works for his tape drive. It probably 177 * needs more work. - mycroft, 09APR1994 178 */ 179 {{T_SEQUENTIAL, T_REMOV, 180 "SANKYO ", "CP525 ", ""}, {0, 0, { 181 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 182 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 183 {0, 0, QIC_150}, /* minor 8-11 */ 184 {0, 0, QIC_120} /* minor 12-15 */ 185 }}}, 186 {{T_SEQUENTIAL, T_REMOV, 187 "ANRITSU ", "DMT780 ", ""}, {0, 0, { 188 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 189 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 190 {0, 0, QIC_150}, /* minor 8-11 */ 191 {0, 0, QIC_120} /* minor 12-15 */ 192 }}}, 193 {{T_SEQUENTIAL, T_REMOV, 194 "ARCHIVE ", "VIPER 150 21247", ""}, {ST_Q_ERASE_NOIMM, 12, { 195 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 196 {0, 0, QIC_150}, /* minor 4-7 */ 197 {0, 0, QIC_120}, /* minor 8-11 */ 198 {0, 0, QIC_24} /* minor 12-15 */ 199 }}}, 200 {{T_SEQUENTIAL, T_REMOV, 201 "ARCHIVE ", "VIPER 150 21531", ""}, {ST_Q_ERASE_NOIMM, 12, { 202 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 203 {0, 0, QIC_150}, /* minor 4-7 */ 204 {0, 0, QIC_120}, /* minor 8-11 */ 205 {0, 0, QIC_24} /* minor 12-15 */ 206 }}}, 207 {{T_SEQUENTIAL, T_REMOV, 208 "WANGTEK ", "5099ES SCSI", ""}, {0, 0, { 209 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 210 {0, 0, QIC_11}, /* minor 4-7 */ 211 {0, 0, QIC_24}, /* minor 8-11 */ 212 {0, 0, QIC_24} /* minor 12-15 */ 213 }}}, 214 {{T_SEQUENTIAL, T_REMOV, 215 "WANGTEK ", "5150ES SCSI", ""}, {0, 0, { 216 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 217 {0, 0, QIC_24}, /* minor 4-7 */ 218 {0, 0, QIC_120}, /* minor 8-11 */ 219 {0, 0, QIC_150} /* minor 12-15 */ 220 }}}, 221 {{T_SEQUENTIAL, T_REMOV, 222 "WANGTEK ", "5525ES SCSI REV7", ""}, {0, 0, { 223 {0, 0, 0}, /* minor 0-3 */ 224 {ST_Q_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 225 {0, 0, QIC_150}, /* minor 8-11 */ 226 {0, 0, QIC_120} /* minor 12-15 */ 227 }}}, 228 {{T_SEQUENTIAL, T_REMOV, 229 "WangDAT ", "Model 1300 ", ""}, {0, 0, { 230 {0, 0, 0}, /* minor 0-3 */ 231 {ST_Q_FORCE_BLKSIZE, 512, DDS}, /* minor 4-7 */ 232 {ST_Q_FORCE_BLKSIZE, 1024, DDS}, /* minor 8-11 */ 233 {ST_Q_FORCE_BLKSIZE, 0, DDS} /* minor 12-15 */ 234 }}}, 235 {{T_SEQUENTIAL, T_REMOV, 236 "EXABYTE ", "EXB-8200 ", "263H"}, {0, 5, { 237 {0, 0, 0}, /* minor 0-3 */ 238 {0, 0, 0}, /* minor 4-7 */ 239 {0, 0, 0}, /* minor 8-11 */ 240 {0, 0, 0} /* minor 12-15 */ 241 }}}, 242 {{T_SEQUENTIAL, T_REMOV, 243 "STK", "9490", ""}, 244 {ST_Q_FORCE_BLKSIZE, 0, { 245 {0, 0, 0}, /* minor 0-3 */ 246 {0, 0, 0}, /* minor 4-7 */ 247 {0, 0, 0}, /* minor 8-11 */ 248 {0, 0, 0} /* minor 12-15 */ 249 }}}, 250 {{T_SEQUENTIAL, T_REMOV, 251 "STK", "SD-3", ""}, 252 {ST_Q_FORCE_BLKSIZE, 0, { 253 {0, 0, 0}, /* minor 0-3 */ 254 {0, 0, 0}, /* minor 4-7 */ 255 {0, 0, 0}, /* minor 8-11 */ 256 {0, 0, 0} /* minor 12-15 */ 257 }}}, 258 {{T_SEQUENTIAL, T_REMOV, 259 "IBM", "03590", ""}, {ST_Q_IGNORE_LOADS, 0, { 260 {0, 0, 0}, /* minor 0-3 */ 261 {0, 0, 0}, /* minor 4-7 */ 262 {0, 0, 0}, /* minor 8-11 */ 263 {0, 0, 0} /* minor 12-15 */ 264 }}}, 265 {{T_SEQUENTIAL, T_REMOV, 266 "HP ", "T4000s ", ""}, {ST_Q_UNIMODAL, 0, { 267 {0, 0, QIC_3095}, /* minor 0-3 */ 268 {0, 0, QIC_3095}, /* minor 4-7 */ 269 {0, 0, QIC_3095}, /* minor 8-11 */ 270 {0, 0, QIC_3095}, /* minor 12-15 */ 271 }}}, 272 #if 0 273 {{T_SEQUENTIAL, T_REMOV, 274 "EXABYTE ", "EXB-8200 ", ""}, {0, 12, { 275 {0, 0, 0}, /* minor 0-3 */ 276 {0, 0, 0}, /* minor 4-7 */ 277 {0, 0, 0}, /* minor 8-11 */ 278 {0, 0, 0} /* minor 12-15 */ 279 }}}, 280 #endif 281 {{T_SEQUENTIAL, T_REMOV, 282 "TEAC ", "MT-2ST/N50 ", ""}, {ST_Q_IGNORE_LOADS, 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 {{T_SEQUENTIAL, T_REMOV, 289 "OnStream", "ADR50 Drive", ""}, {ST_Q_UNIMODAL, 0, { 290 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 291 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 4-7 */ 292 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 8-11 */ 293 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 12-15 */ 294 }}}, 295 {{T_SEQUENTIAL, T_REMOV, 296 "OnStream DI-30", "", "1.0"}, {ST_Q_NOFILEMARKS, 0, { 297 {0, 0, 0}, /* minor 0-3 */ 298 {0, 0, 0}, /* minor 4-7 */ 299 {0, 0, 0}, /* minor 8-11 */ 300 {0, 0, 0} /* minor 12-15 */ 301 }}}, 302 {{T_SEQUENTIAL, T_REMOV, 303 "NCR H621", "0-STD-03-46F880 ", ""}, {ST_Q_NOPREVENT, 0, { 304 {0, 0, 0}, /* minor 0-3 */ 305 {0, 0, 0}, /* minor 4-7 */ 306 {0, 0, 0}, /* minor 8-11 */ 307 {0, 0, 0} /* minor 12-15 */ 308 }}}, 309 {{T_SEQUENTIAL, T_REMOV, 310 "Seagate STT3401A", "hp0atxa", ""}, {0, 0, { 311 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 312 {ST_Q_FORCE_BLKSIZE, 1024, 0}, /* minor 4-7 */ 313 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 8-11 */ 314 {ST_Q_FORCE_BLKSIZE, 512, 0} /* minor 12-15 */ 315 }}}, 316 }; 317 318 #define NOEJECT 0 319 #define EJECT 1 320 321 static void st_identify_drive(struct st_softc *, 322 struct scsipi_inquiry_pattern *); 323 static void st_loadquirks(struct st_softc *); 324 static int st_mount_tape(dev_t, int); 325 static void st_unmount(struct st_softc *, boolean); 326 static int st_decide_mode(struct st_softc *, boolean); 327 static void ststart(struct scsipi_periph *); 328 static void strestart(void *); 329 static void stdone(struct scsipi_xfer *, int); 330 static int st_read(struct st_softc *, char *, int, int); 331 static int st_space(struct st_softc *, int, u_int, int); 332 static int st_write_filemarks(struct st_softc *, int, int); 333 static int st_check_eod(struct st_softc *, boolean, int *, int); 334 static int st_load(struct st_softc *, u_int, int); 335 static int st_rewind(struct st_softc *, u_int, int); 336 static int st_interpret_sense(struct scsipi_xfer *); 337 static int st_touch_tape(struct st_softc *); 338 static int st_erase(struct st_softc *, int full, int flags); 339 static int st_rdpos(struct st_softc *, int, u_int32_t *); 340 static int st_setpos(struct st_softc *, int, u_int32_t *); 341 342 static const struct scsipi_periphsw st_switch = { 343 st_interpret_sense, 344 ststart, 345 NULL, 346 stdone 347 }; 348 349 #if defined(ST_ENABLE_EARLYWARN) 350 #define ST_INIT_FLAGS ST_EARLYWARN 351 #else 352 #define ST_INIT_FLAGS 0 353 #endif 354 355 /* 356 * The routine called by the low level scsi routine when it discovers 357 * A device suitable for this driver 358 */ 359 void 360 stattach(device_t parent, struct st_softc *st, void *aux) 361 { 362 struct scsipibus_attach_args *sa = aux; 363 struct scsipi_periph *periph = sa->sa_periph; 364 365 SC_DEBUG(periph, SCSIPI_DB2, ("stattach: ")); 366 367 /* 368 * Store information needed to contact our base driver 369 */ 370 st->sc_periph = periph; 371 periph->periph_dev = &st->sc_dev; 372 periph->periph_switch = &st_switch; 373 374 /* 375 * Set initial flags 376 */ 377 378 st->flags = ST_INIT_FLAGS; 379 380 /* 381 * Set up the buf queue for this device 382 */ 383 bufq_alloc(&st->buf_queue, "fcfs", 0); 384 385 callout_init(&st->sc_callout, 0); 386 387 /* 388 * Check if the drive is a known criminal and take 389 * Any steps needed to bring it into line 390 */ 391 st_identify_drive(st, &sa->sa_inqbuf); 392 /* 393 * Use the subdriver to request information regarding the drive. 394 */ 395 printf("\n"); 396 printf("%s: %s", device_xname(&st->sc_dev), st->quirkdata ? "quirks apply, " : ""); 397 if (scsipi_test_unit_ready(periph, 398 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE) || 399 st->ops(st, ST_OPS_MODESENSE, 400 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE)) 401 printf("drive empty\n"); 402 else { 403 printf("density code %d, ", st->media_density); 404 if (st->media_blksize > 0) 405 printf("%d-byte", st->media_blksize); 406 else 407 printf("variable"); 408 printf(" blocks, write-%s\n", 409 (st->flags & ST_READONLY) ? "protected" : "enabled"); 410 } 411 412 st->stats = iostat_alloc(IOSTAT_TAPE, parent, device_xname(&st->sc_dev)); 413 414 #if NRND > 0 415 rnd_attach_source(&st->rnd_source, device_xname(&st->sc_dev), 416 RND_TYPE_TAPE, 0); 417 #endif 418 } 419 420 int 421 stactivate(device_t self, enum devact act) 422 { 423 int rv = 0; 424 425 switch (act) { 426 case DVACT_ACTIVATE: 427 rv = EOPNOTSUPP; 428 break; 429 430 case DVACT_DEACTIVATE: 431 /* 432 * Nothing to do; we key off the device's DVF_ACTIVE. 433 */ 434 break; 435 } 436 return (rv); 437 } 438 439 int 440 stdetach(device_t self, int flags) 441 { 442 struct st_softc *st = device_private(self); 443 int s, bmaj, cmaj, mn; 444 445 /* locate the major number */ 446 bmaj = bdevsw_lookup_major(&st_bdevsw); 447 cmaj = cdevsw_lookup_major(&st_cdevsw); 448 449 /* kill any pending restart */ 450 callout_stop(&st->sc_callout); 451 452 s = splbio(); 453 454 /* Kill off any queued buffers. */ 455 bufq_drain(st->buf_queue); 456 457 bufq_free(st->buf_queue); 458 459 /* Kill off any pending commands. */ 460 scsipi_kill_pending(st->sc_periph); 461 462 splx(s); 463 464 /* Nuke the vnodes for any open instances */ 465 mn = STUNIT(device_unit(self)); 466 vdevgone(bmaj, mn, mn+STNMINOR-1, VBLK); 467 vdevgone(cmaj, mn, mn+STNMINOR-1, VCHR); 468 469 iostat_free(st->stats); 470 471 #if NRND > 0 472 /* Unhook the entropy source. */ 473 rnd_detach_source(&st->rnd_source); 474 #endif 475 476 return (0); 477 } 478 479 /* 480 * Use the inquiry routine in 'scsi_base' to get drive info so we can 481 * Further tailor our behaviour. 482 */ 483 static void 484 st_identify_drive(struct st_softc *st, struct scsipi_inquiry_pattern *inqbuf) 485 { 486 const struct st_quirk_inquiry_pattern *finger; 487 int priority; 488 489 finger = scsipi_inqmatch(inqbuf, 490 st_quirk_patterns, 491 sizeof(st_quirk_patterns) / sizeof(st_quirk_patterns[0]), 492 sizeof(st_quirk_patterns[0]), &priority); 493 if (priority != 0) { 494 st->quirkdata = &finger->quirkdata; 495 st->drive_quirks = finger->quirkdata.quirks; 496 st->quirks = finger->quirkdata.quirks; /* start value */ 497 st->page_0_size = finger->quirkdata.page_0_size; 498 KASSERT(st->page_0_size <= MAX_PAGE_0_SIZE); 499 st_loadquirks(st); 500 } 501 } 502 503 /* 504 * initialise the subdevices to the default (QUIRK) state. 505 * this will remove any setting made by the system operator or previous 506 * operations. 507 */ 508 static void 509 st_loadquirks(struct st_softc *st) 510 { 511 int i; 512 const struct modes *mode; 513 struct modes *mode2; 514 515 mode = st->quirkdata->modes; 516 mode2 = st->modes; 517 for (i = 0; i < 4; i++) { 518 memset(mode2, 0, sizeof(struct modes)); 519 st->modeflags[i] &= ~(BLKSIZE_SET_BY_QUIRK | 520 DENSITY_SET_BY_QUIRK | BLKSIZE_SET_BY_USER | 521 DENSITY_SET_BY_USER); 522 if ((mode->quirks | st->drive_quirks) & ST_Q_FORCE_BLKSIZE) { 523 mode2->blksize = mode->blksize; 524 st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; 525 } 526 if (mode->density) { 527 mode2->density = mode->density; 528 st->modeflags[i] |= DENSITY_SET_BY_QUIRK; 529 } 530 mode2->quirks |= mode->quirks; 531 mode++; 532 mode2++; 533 } 534 } 535 536 /* 537 * open the device. 538 */ 539 static int 540 stopen(dev_t dev, int flags, int mode, struct lwp *l) 541 { 542 u_int stmode, dsty; 543 int error, sflags, unit, tries, ntries; 544 struct st_softc *st; 545 struct scsipi_periph *periph; 546 struct scsipi_adapter *adapt; 547 548 unit = STUNIT(dev); 549 st = device_lookup_private(&st_cd, unit); 550 if (st == NULL) 551 return (ENXIO); 552 553 stmode = STMODE(dev); 554 dsty = STDSTY(dev); 555 556 periph = st->sc_periph; 557 adapt = periph->periph_channel->chan_adapter; 558 559 SC_DEBUG(periph, SCSIPI_DB1, ("open: dev=0x%"PRIx64" (unit %d (of %d))\n", dev, 560 unit, st_cd.cd_ndevs)); 561 562 563 /* 564 * Only allow one at a time 565 */ 566 if (periph->periph_flags & PERIPH_OPEN) { 567 aprint_error_dev(&st->sc_dev, "already open\n"); 568 return (EBUSY); 569 } 570 571 if ((error = scsipi_adapter_addref(adapt)) != 0) 572 return (error); 573 574 /* 575 * clear any latched errors. 576 */ 577 st->mt_resid = 0; 578 st->mt_erreg = 0; 579 st->asc = 0; 580 st->ascq = 0; 581 582 /* 583 * Catch any unit attention errors. Be silent about this 584 * unless we're already mounted. We ignore media change 585 * if we're in control mode or not mounted yet. 586 */ 587 if ((st->flags & ST_MOUNTED) == 0 || stmode == CTRL_MODE) { 588 #ifdef SCSIDEBUG 589 sflags = XS_CTL_IGNORE_MEDIA_CHANGE; 590 #else 591 sflags = XS_CTL_SILENT|XS_CTL_IGNORE_MEDIA_CHANGE; 592 #endif 593 } else 594 sflags = 0; 595 596 /* 597 * If we're already mounted or we aren't configured for 598 * a mount delay, only try a test unit ready once. Otherwise, 599 * try up to ST_MOUNT_DELAY times with a rest interval of 600 * one second between each try. 601 */ 602 603 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0) { 604 ntries = 1; 605 } else { 606 ntries = ST_MOUNT_DELAY; 607 } 608 609 for (error = tries = 0; tries < ntries; tries++) { 610 int slpintr, oflags; 611 612 /* 613 * If we had no error, or we're opening the control mode 614 * device, we jump out right away. 615 */ 616 617 error = scsipi_test_unit_ready(periph, sflags); 618 if (error == 0 || stmode == CTRL_MODE) { 619 break; 620 } 621 622 /* 623 * We had an error. 624 * 625 * If we're already mounted or we aren't configured for 626 * a mount delay, or the error isn't a NOT READY error, 627 * skip to the error exit now. 628 */ 629 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0 || 630 (st->mt_key != SKEY_NOT_READY)) { 631 goto bad; 632 } 633 634 /* 635 * clear any latched errors. 636 */ 637 st->mt_resid = 0; 638 st->mt_erreg = 0; 639 st->asc = 0; 640 st->ascq = 0; 641 642 /* 643 * Fake that we have the device open so 644 * we block other apps from getting in. 645 */ 646 647 oflags = periph->periph_flags; 648 periph->periph_flags |= PERIPH_OPEN; 649 650 slpintr = tsleep(&lbolt, PUSER|PCATCH, "stload", 0); 651 652 periph->periph_flags = oflags; /* restore flags */ 653 if (slpintr) { 654 goto bad; 655 } 656 } 657 658 659 /* 660 * If the mode is 3 (e.g. minor = 3,7,11,15) then the device has 661 * been opened to set defaults and perform other, usually non-I/O 662 * related, operations. In this case, do a quick check to see 663 * whether the unit actually had a tape loaded (this will be known 664 * as to whether or not we got a NOT READY for the above 665 * unit attention). If a tape is there, go do a mount sequence. 666 */ 667 if (stmode == CTRL_MODE && st->mt_key == SKEY_NOT_READY) { 668 periph->periph_flags |= PERIPH_OPEN; 669 return (0); 670 } 671 672 /* 673 * If we get this far and had an error set, that means we failed 674 * to pass the 'test unit ready' test for the non-controlmode device, 675 * so we bounce the open. 676 */ 677 678 if (error) 679 return (error); 680 681 /* 682 * Else, we're now committed to saying we're open. 683 */ 684 685 periph->periph_flags |= PERIPH_OPEN; /* unit attn are now errors */ 686 687 /* 688 * If it's a different mode, or if the media has been 689 * invalidated, unmount the tape from the previous 690 * session but continue with open processing 691 */ 692 if (st->last_dsty != dsty || 693 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 694 st_unmount(st, NOEJECT); 695 696 /* 697 * If we are not mounted, then we should start a new 698 * mount session. 699 */ 700 if (!(st->flags & ST_MOUNTED)) { 701 if ((error = st_mount_tape(dev, flags)) != 0) 702 goto bad; 703 st->last_dsty = dsty; 704 } 705 if (!(st->quirks & ST_Q_NOPREVENT)) { 706 scsipi_prevent(periph, SPAMR_PREVENT_DT, 707 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 708 } 709 710 SC_DEBUG(periph, SCSIPI_DB2, ("open complete\n")); 711 return (0); 712 713 bad: 714 st_unmount(st, NOEJECT); 715 scsipi_adapter_delref(adapt); 716 periph->periph_flags &= ~PERIPH_OPEN; 717 return (error); 718 } 719 720 /* 721 * close the device.. only called if we are the LAST 722 * occurence of an open device 723 */ 724 static int 725 stclose(dev_t dev, int flags, int mode, struct lwp *l) 726 { 727 int stxx, error = 0; 728 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(dev)); 729 struct scsipi_periph *periph = st->sc_periph; 730 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 731 732 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("closing\n")); 733 734 /* 735 * Make sure that a tape opened in write-only mode will have 736 * file marks written on it when closed, even if not written to. 737 * 738 * This is for SUN compatibility. Actually, the Sun way of 739 * things is to: 740 * 741 * only write filemarks if there are fmks to be written and 742 * - open for write (possibly read/write) 743 * - the last operation was a write 744 * or: 745 * - opened for wronly 746 * - no data was written (including filemarks) 747 */ 748 749 stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); 750 if (((flags & FWRITE) && stxx == ST_WRITTEN) || 751 ((flags & O_ACCMODE) == FWRITE && stxx == 0)) { 752 int nm; 753 error = st_check_eod(st, FALSE, &nm, 0); 754 } 755 756 /* 757 * Allow robots to eject tape if needed. 758 */ 759 scsipi_prevent(periph, SPAMR_ALLOW, 760 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 761 762 switch (STMODE(dev)) { 763 case NORMAL_MODE: 764 st_unmount(st, NOEJECT); 765 break; 766 case NOREW_MODE: 767 case CTRL_MODE: 768 /* 769 * Leave mounted unless media seems to have been removed. 770 * 771 * Otherwise, if we're to terminate a tape with more than one 772 * filemark [ and because we're not rewinding here ], backspace 773 * one filemark so that later appends will see an unbroken 774 * sequence of: 775 * 776 * file - FMK - file - FMK ... file - FMK FMK (EOM) 777 */ 778 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 779 st_unmount(st, NOEJECT); 780 } else if (error == 0) { 781 /* 782 * ST_WRITTEN was preserved from above. 783 * 784 * All we need to know here is: 785 * 786 * Were we writing this tape and was the last 787 * operation a write? 788 * 789 * Are there supposed to be 2FM at EOD? 790 * 791 * If both statements are true, then we backspace 792 * one filemark. 793 */ 794 stxx |= (st->flags & ST_2FM_AT_EOD); 795 if ((flags & FWRITE) != 0 && 796 (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { 797 error = st_space(st, -1, SP_FILEMARKS, 0); 798 } 799 } 800 break; 801 case EJECT_MODE: 802 st_unmount(st, EJECT); 803 break; 804 } 805 806 scsipi_wait_drain(periph); 807 808 scsipi_adapter_delref(adapt); 809 periph->periph_flags &= ~PERIPH_OPEN; 810 811 return (error); 812 } 813 814 /* 815 * Start a new mount session. 816 * Copy in all the default parameters from the selected device mode. 817 * and try guess any that seem to be defaulted. 818 */ 819 static int 820 st_mount_tape(dev_t dev, int flags) 821 { 822 int unit; 823 u_int dsty; 824 struct st_softc *st; 825 struct scsipi_periph *periph; 826 int error = 0; 827 828 unit = STUNIT(dev); 829 dsty = STDSTY(dev); 830 st = device_lookup_private(&st_cd, unit); 831 periph = st->sc_periph; 832 833 if (st->flags & ST_MOUNTED) 834 return (0); 835 836 SC_DEBUG(periph, SCSIPI_DB1, ("mounting\n ")); 837 st->flags |= ST_NEW_MOUNT; 838 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 839 /* 840 * If the media is new, then make sure we give it a chance to 841 * to do a 'load' instruction. (We assume it is new.) 842 */ 843 if ((error = st_load(st, LD_LOAD, XS_CTL_SILENT)) != 0) 844 return (error); 845 /* 846 * Throw another dummy instruction to catch 847 * 'Unit attention' errors. Many drives give 848 * these after doing a Load instruction (with 849 * the MEDIUM MAY HAVE CHANGED asc/ascq). 850 */ 851 scsipi_test_unit_ready(periph, XS_CTL_SILENT); /* XXX */ 852 853 /* 854 * Some devices can't tell you much until they have been 855 * asked to look at the media. This quirk does this. 856 */ 857 if (st->quirks & ST_Q_SENSE_HELP) 858 if ((error = st_touch_tape(st)) != 0) 859 return (error); 860 /* 861 * Load the physical device parameters 862 * loads: blkmin, blkmax 863 */ 864 if ((error = st->ops(st, ST_OPS_RBL, 0)) != 0) 865 return (error); 866 /* 867 * Load the media dependent parameters 868 * includes: media_blksize,media_density,numblks 869 * As we have a tape in, it should be reflected here. 870 * If not you may need the "quirk" above. 871 */ 872 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 873 return (error); 874 /* 875 * If we have gained a permanent density from somewhere, 876 * then use it in preference to the one supplied by 877 * default by the driver. 878 */ 879 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 880 st->density = st->modes[dsty].density; 881 else 882 st->density = st->media_density; 883 /* 884 * If we have gained a permanent blocksize 885 * then use it in preference to the one supplied by 886 * default by the driver. 887 */ 888 st->flags &= ~ST_FIXEDBLOCKS; 889 if (st->modeflags[dsty] & 890 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 891 st->blksize = st->modes[dsty].blksize; 892 if (st->blksize) 893 st->flags |= ST_FIXEDBLOCKS; 894 } else { 895 if ((error = st_decide_mode(st, FALSE)) != 0) 896 return (error); 897 } 898 if ((error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 899 /* ATAPI will return ENODEV for this, and this may be OK */ 900 if (error != ENODEV) { 901 aprint_error_dev(&st->sc_dev, "cannot set selected mode\n"); 902 return (error); 903 } 904 } 905 st->flags &= ~ST_NEW_MOUNT; 906 st->flags |= ST_MOUNTED; 907 periph->periph_flags |= PERIPH_MEDIA_LOADED; /* move earlier? */ 908 st->blkno = st->fileno = (daddr_t) 0; 909 return (0); 910 } 911 912 /* 913 * End the present mount session. 914 * Rewind, and optionally eject the tape. 915 * Reset various flags to indicate that all new 916 * operations require another mount operation 917 */ 918 static void 919 st_unmount(struct st_softc *st, boolean eject) 920 { 921 struct scsipi_periph *periph = st->sc_periph; 922 int nmarks; 923 924 if ((st->flags & ST_MOUNTED) == 0) 925 return; 926 SC_DEBUG(periph, SCSIPI_DB1, ("unmounting\n")); 927 st_check_eod(st, FALSE, &nmarks, XS_CTL_IGNORE_NOT_READY); 928 st_rewind(st, 0, XS_CTL_IGNORE_NOT_READY); 929 930 /* 931 * Section 9.3.3 of the SCSI specs states that a device shall return 932 * the density value specified in the last succesfull MODE SELECT 933 * after an unload operation, in case it is not able to 934 * automatically determine the density of the new medium. 935 * 936 * So we instruct the device to use the default density, which will 937 * prevent the use of stale density values (in particular, 938 * in st_touch_tape(). 939 */ 940 st->density = 0; 941 if (st->ops(st, ST_OPS_MODESELECT, 0) != 0) { 942 aprint_error_dev(&st->sc_dev, "WARNING: cannot revert to default density\n"); 943 } 944 945 if (eject) { 946 if (!(st->quirks & ST_Q_NOPREVENT)) { 947 scsipi_prevent(periph, SPAMR_ALLOW, 948 XS_CTL_IGNORE_ILLEGAL_REQUEST | 949 XS_CTL_IGNORE_NOT_READY); 950 } 951 st_load(st, LD_UNLOAD, XS_CTL_IGNORE_NOT_READY); 952 st->blkno = st->fileno = (daddr_t) -1; 953 } else { 954 st->blkno = st->fileno = (daddr_t) 0; 955 } 956 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 957 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 958 } 959 960 /* 961 * Given all we know about the device, media, mode, 'quirks' and 962 * initial operation, make a decision as to how we should be set 963 * to run (regarding blocking and EOD marks) 964 */ 965 int 966 st_decide_mode(struct st_softc *st, boolean first_read) 967 { 968 969 SC_DEBUG(st->sc_periph, SCSIPI_DB2, ("starting block mode decision\n")); 970 971 /* 972 * If the drive can only handle fixed-length blocks and only at 973 * one size, perhaps we should just do that. 974 */ 975 if (st->blkmin && (st->blkmin == st->blkmax)) { 976 st->flags |= ST_FIXEDBLOCKS; 977 st->blksize = st->blkmin; 978 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 979 ("blkmin == blkmax of %d\n", st->blkmin)); 980 goto done; 981 } 982 /* 983 * If the tape density mandates (or even suggests) use of fixed 984 * or variable-length blocks, comply. 985 */ 986 switch (st->density) { 987 case HALFINCH_800: 988 case HALFINCH_1600: 989 case HALFINCH_6250: 990 case DDS: 991 st->flags &= ~ST_FIXEDBLOCKS; 992 st->blksize = 0; 993 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 994 ("density specified variable\n")); 995 goto done; 996 case QIC_11: 997 case QIC_24: 998 case QIC_120: 999 case QIC_150: 1000 case QIC_525: 1001 case QIC_1320: 1002 case QIC_3095: 1003 case QIC_3220: 1004 st->flags |= ST_FIXEDBLOCKS; 1005 if (st->media_blksize > 0) 1006 st->blksize = st->media_blksize; 1007 else 1008 st->blksize = DEF_FIXED_BSIZE; 1009 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1010 ("density specified fixed\n")); 1011 goto done; 1012 } 1013 /* 1014 * If we're about to read the tape, perhaps we should choose 1015 * fixed or variable-length blocks and block size according to 1016 * what the drive found on the tape. 1017 */ 1018 if (first_read && 1019 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 1020 (st->media_blksize == DEF_FIXED_BSIZE) || 1021 (st->media_blksize == 1024))) { 1022 if (st->media_blksize > 0) 1023 st->flags |= ST_FIXEDBLOCKS; 1024 else 1025 st->flags &= ~ST_FIXEDBLOCKS; 1026 st->blksize = st->media_blksize; 1027 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1028 ("Used media_blksize of %d\n", st->media_blksize)); 1029 goto done; 1030 } 1031 /* 1032 * We're getting no hints from any direction. Choose variable- 1033 * length blocks arbitrarily. 1034 */ 1035 st->flags &= ~ST_FIXEDBLOCKS; 1036 st->blksize = 0; 1037 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1038 ("Give up and default to variable mode\n")); 1039 1040 done: 1041 /* 1042 * Decide whether or not to write two file marks to signify end- 1043 * of-data. Make the decision as a function of density. If 1044 * the decision is not to use a second file mark, the SCSI BLANK 1045 * CHECK condition code will be recognized as end-of-data when 1046 * first read. 1047 * (I think this should be a by-product of fixed/variable..julian) 1048 */ 1049 switch (st->density) { 1050 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 1051 case QIC_11: 1052 case QIC_24: 1053 case QIC_120: 1054 case QIC_150: 1055 case QIC_525: 1056 case QIC_1320: 1057 case QIC_3095: 1058 case QIC_3220: 1059 st->flags &= ~ST_2FM_AT_EOD; 1060 break; 1061 default: 1062 st->flags |= ST_2FM_AT_EOD; 1063 } 1064 return (0); 1065 } 1066 1067 /* 1068 * Actually translate the requested transfer into 1069 * one the physical driver can understand 1070 * The transfer is described by a buf and will include 1071 * only one physical transfer. 1072 */ 1073 static void 1074 ststrategy(struct buf *bp) 1075 { 1076 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(bp->b_dev)); 1077 int s; 1078 1079 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1080 ("ststrategy %d bytes @ blk %" PRId64 "\n", bp->b_bcount, bp->b_blkno)); 1081 /* 1082 * If it's a null transfer, return immediately 1083 */ 1084 if (bp->b_bcount == 0) 1085 goto abort; 1086 1087 /* If offset is negative, error */ 1088 if (bp->b_blkno < 0) { 1089 bp->b_error = EINVAL; 1090 goto abort; 1091 } 1092 1093 /* 1094 * Odd sized request on fixed drives are verboten 1095 */ 1096 if (st->flags & ST_FIXEDBLOCKS) { 1097 if (bp->b_bcount % st->blksize) { 1098 aprint_error_dev(&st->sc_dev, "bad request, must be multiple of %d\n", 1099 st->blksize); 1100 bp->b_error = EIO; 1101 goto abort; 1102 } 1103 } 1104 /* 1105 * as are out-of-range requests on variable drives. 1106 */ 1107 else if (bp->b_bcount < st->blkmin || 1108 (st->blkmax && bp->b_bcount > st->blkmax)) { 1109 aprint_error_dev(&st->sc_dev, "bad request, must be between %d and %d\n", 1110 st->blkmin, st->blkmax); 1111 bp->b_error = EIO; 1112 goto abort; 1113 } 1114 s = splbio(); 1115 1116 /* 1117 * Place it in the queue of activities for this tape 1118 * at the end (a bit silly because we only have on user.. 1119 * (but it could fork())) 1120 */ 1121 bufq_put(st->buf_queue, bp); 1122 1123 /* 1124 * Tell the device to get going on the transfer if it's 1125 * not doing anything, otherwise just wait for completion 1126 * (All a bit silly if we're only allowing 1 open but..) 1127 */ 1128 ststart(st->sc_periph); 1129 1130 splx(s); 1131 return; 1132 abort: 1133 /* 1134 * Reset the residue because we didn't do anything, 1135 * and send the buffer back as done. 1136 */ 1137 bp->b_resid = bp->b_bcount; 1138 biodone(bp); 1139 return; 1140 } 1141 1142 /* 1143 * ststart looks to see if there is a buf waiting for the device 1144 * and that the device is not already busy. If both are true, 1145 * It dequeues the buf and creates a scsi command to perform the 1146 * transfer required. The transfer request will call scsipi_done 1147 * on completion, which will in turn call this routine again 1148 * so that the next queued transfer is performed. 1149 * The bufs are queued by the strategy routine (ststrategy) 1150 * 1151 * This routine is also called after other non-queued requests 1152 * have been made of the scsi driver, to ensure that the queue 1153 * continues to be drained. 1154 * ststart() is called at splbio 1155 */ 1156 static void 1157 ststart(struct scsipi_periph *periph) 1158 { 1159 struct st_softc *st = (void *)periph->periph_dev; 1160 struct buf *bp; 1161 struct scsi_rw_tape cmd; 1162 struct scsipi_xfer *xs; 1163 int flags, error; 1164 1165 SC_DEBUG(periph, SCSIPI_DB2, ("ststart ")); 1166 /* 1167 * See if there is a buf to do and we are not already 1168 * doing one 1169 */ 1170 while (periph->periph_active < periph->periph_openings) { 1171 /* if a special awaits, let it proceed first */ 1172 if (periph->periph_flags & PERIPH_WAITING) { 1173 periph->periph_flags &= ~PERIPH_WAITING; 1174 wakeup((void *)periph); 1175 return; 1176 } 1177 1178 /* 1179 * If the device has been unmounted by the user 1180 * then throw away all requests until done. 1181 */ 1182 if (__predict_false((st->flags & ST_MOUNTED) == 0 || 1183 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0)) { 1184 if ((bp = bufq_get(st->buf_queue)) != NULL) { 1185 /* make sure that one implies the other.. */ 1186 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 1187 bp->b_error = EIO; 1188 bp->b_resid = bp->b_bcount; 1189 biodone(bp); 1190 continue; 1191 } else { 1192 return; 1193 } 1194 } 1195 1196 if ((bp = bufq_peek(st->buf_queue)) == NULL) 1197 return; 1198 1199 iostat_busy(st->stats); 1200 1201 /* 1202 * only FIXEDBLOCK devices have pending I/O or space operations. 1203 */ 1204 if (st->flags & ST_FIXEDBLOCKS) { 1205 /* 1206 * If we are at a filemark but have not reported it yet 1207 * then we should report it now 1208 */ 1209 if (st->flags & ST_AT_FILEMARK) { 1210 if ((bp->b_flags & B_READ) == B_WRITE) { 1211 /* 1212 * Handling of ST_AT_FILEMARK in 1213 * st_space will fill in the right file 1214 * mark count. 1215 * Back up over filemark 1216 */ 1217 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1218 bufq_get(st->buf_queue); 1219 bp->b_error = EIO; 1220 bp->b_resid = bp->b_bcount; 1221 biodone(bp); 1222 continue; 1223 } 1224 } else { 1225 bufq_get(st->buf_queue); 1226 bp->b_resid = bp->b_bcount; 1227 bp->b_error = 0; 1228 st->flags &= ~ST_AT_FILEMARK; 1229 biodone(bp); 1230 continue; /* seek more work */ 1231 } 1232 } 1233 } 1234 /* 1235 * If we are at EOM but have not reported it 1236 * yet then we should report it now. 1237 */ 1238 if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { 1239 bufq_get(st->buf_queue); 1240 bp->b_resid = bp->b_bcount; 1241 if (st->flags & ST_EIO_PENDING) 1242 bp->b_error = EIO; 1243 st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); 1244 biodone(bp); 1245 continue; /* seek more work */ 1246 } 1247 1248 /* 1249 * Fill out the scsi command 1250 */ 1251 memset(&cmd, 0, sizeof(cmd)); 1252 flags = XS_CTL_NOSLEEP | XS_CTL_ASYNC; 1253 if ((bp->b_flags & B_READ) == B_WRITE) { 1254 cmd.opcode = WRITE; 1255 st->flags &= ~ST_FM_WRITTEN; 1256 flags |= XS_CTL_DATA_OUT; 1257 } else { 1258 cmd.opcode = READ; 1259 flags |= XS_CTL_DATA_IN; 1260 } 1261 1262 /* 1263 * Handle "fixed-block-mode" tape drives by using the 1264 * block count instead of the length. 1265 */ 1266 if (st->flags & ST_FIXEDBLOCKS) { 1267 cmd.byte2 |= SRW_FIXED; 1268 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1269 } else 1270 _lto3b(bp->b_bcount, cmd.len); 1271 1272 /* 1273 * Clear 'position updated' indicator 1274 */ 1275 st->flags &= ~ST_POSUPDATED; 1276 1277 /* 1278 * go ask the adapter to do all this for us 1279 */ 1280 xs = scsipi_make_xs(periph, 1281 (struct scsipi_generic *)&cmd, sizeof(cmd), 1282 (u_char *)bp->b_data, bp->b_bcount, 1283 0, ST_IO_TIME, bp, flags); 1284 if (__predict_false(xs == NULL)) { 1285 /* 1286 * out of memory. Keep this buffer in the queue, and 1287 * retry later. 1288 */ 1289 callout_reset(&st->sc_callout, hz / 2, strestart, 1290 periph); 1291 return; 1292 } 1293 /* 1294 * need to dequeue the buffer before queuing the command, 1295 * because cdstart may be called recursively from the 1296 * HBA driver 1297 */ 1298 #ifdef DIAGNOSTIC 1299 if (bufq_get(st->buf_queue) != bp) 1300 panic("ststart(): dequeued wrong buf"); 1301 #else 1302 bufq_get(st->buf_queue); 1303 #endif 1304 error = scsipi_execute_xs(xs); 1305 /* with a scsipi_xfer preallocated, scsipi_command can't fail */ 1306 KASSERT(error == 0); 1307 } /* go back and see if we can cram more work in.. */ 1308 } 1309 1310 static void 1311 strestart(void *v) 1312 { 1313 int s = splbio(); 1314 ststart((struct scsipi_periph *)v); 1315 splx(s); 1316 } 1317 1318 1319 static void 1320 stdone(struct scsipi_xfer *xs, int error) 1321 { 1322 struct st_softc *st = (void *)xs->xs_periph->periph_dev; 1323 struct buf *bp = xs->bp; 1324 1325 if (bp) { 1326 bp->b_error = error; 1327 bp->b_resid = xs->resid; 1328 /* 1329 * buggy device ? A SDLT320 can report an info 1330 * field of 0x3de8000 on a Media Error/Write Error 1331 * for this CBD: 0x0a 00 00 80 00 00 1332 */ 1333 if (bp->b_resid > bp->b_bcount || bp->b_resid < 0) 1334 bp->b_resid = bp->b_bcount; 1335 1336 if ((bp->b_flags & B_READ) == B_WRITE) 1337 st->flags |= ST_WRITTEN; 1338 else 1339 st->flags &= ~ST_WRITTEN; 1340 1341 iostat_unbusy(st->stats, bp->b_bcount, 1342 ((bp->b_flags & B_READ) == B_READ)); 1343 1344 #if NRND > 0 1345 rnd_add_uint32(&st->rnd_source, bp->b_blkno); 1346 #endif 1347 1348 if ((st->flags & ST_POSUPDATED) == 0) { 1349 if (error) { 1350 st->fileno = st->blkno = -1; 1351 } else if (st->blkno != -1) { 1352 if (st->flags & ST_FIXEDBLOCKS) 1353 st->blkno += 1354 (bp->b_bcount / st->blksize); 1355 else 1356 st->blkno++; 1357 } 1358 } 1359 1360 biodone(bp); 1361 } 1362 } 1363 1364 static int 1365 stread(dev_t dev, struct uio *uio, int iomode) 1366 { 1367 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(dev)); 1368 1369 return (physio(ststrategy, NULL, dev, B_READ, 1370 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1371 } 1372 1373 static int 1374 stwrite(dev_t dev, struct uio *uio, int iomode) 1375 { 1376 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(dev)); 1377 1378 return (physio(ststrategy, NULL, dev, B_WRITE, 1379 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1380 } 1381 1382 /* 1383 * Perform special action on behalf of the user; 1384 * knows about the internals of this device 1385 */ 1386 static int 1387 stioctl(dev_t dev, u_long cmd, void *arg, int flag, struct lwp *l) 1388 { 1389 int error = 0; 1390 int unit; 1391 int number, nmarks, dsty; 1392 int flags; 1393 struct st_softc *st; 1394 int hold_blksize; 1395 u_int8_t hold_density; 1396 struct mtop *mt = (struct mtop *) arg; 1397 1398 /* 1399 * Find the device that the user is talking about 1400 */ 1401 flags = 0; /* give error messages, act on errors etc. */ 1402 unit = STUNIT(dev); 1403 dsty = STDSTY(dev); 1404 st = device_lookup_private(&st_cd, unit); 1405 hold_blksize = st->blksize; 1406 hold_density = st->density; 1407 1408 switch ((u_int) cmd) { 1409 1410 case MTIOCGET: { 1411 struct mtget *g = (struct mtget *) arg; 1412 /* 1413 * (to get the current state of READONLY) 1414 */ 1415 error = st->ops(st, ST_OPS_MODESENSE, XS_CTL_SILENT); 1416 if (error) { 1417 /* 1418 * Ignore the error if in control mode; 1419 * this is mandated by st(4). 1420 */ 1421 if (STMODE(dev) != CTRL_MODE) 1422 break; 1423 error = 0; 1424 } 1425 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("[ioctl: get status]\n")); 1426 memset(g, 0, sizeof(struct mtget)); 1427 g->mt_type = 0x7; /* Ultrix compat *//*? */ 1428 g->mt_blksiz = st->blksize; 1429 g->mt_density = st->density; 1430 g->mt_mblksiz[0] = st->modes[0].blksize; 1431 g->mt_mblksiz[1] = st->modes[1].blksize; 1432 g->mt_mblksiz[2] = st->modes[2].blksize; 1433 g->mt_mblksiz[3] = st->modes[3].blksize; 1434 g->mt_mdensity[0] = st->modes[0].density; 1435 g->mt_mdensity[1] = st->modes[1].density; 1436 g->mt_mdensity[2] = st->modes[2].density; 1437 g->mt_mdensity[3] = st->modes[3].density; 1438 g->mt_fileno = st->fileno; 1439 g->mt_blkno = st->blkno; 1440 if (st->flags & ST_READONLY) 1441 g->mt_dsreg |= MT_DS_RDONLY; 1442 if (st->flags & ST_MOUNTED) 1443 g->mt_dsreg |= MT_DS_MOUNTED; 1444 g->mt_resid = st->mt_resid; 1445 g->mt_erreg = st->mt_erreg; 1446 /* 1447 * clear latched errors. 1448 */ 1449 st->mt_resid = 0; 1450 st->mt_erreg = 0; 1451 st->asc = 0; 1452 st->ascq = 0; 1453 break; 1454 } 1455 case MTIOCTOP: { 1456 1457 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1458 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1459 mt->mt_count)); 1460 1461 /* compat: in U*x it is a short */ 1462 number = mt->mt_count; 1463 switch ((short) (mt->mt_op)) { 1464 case MTWEOF: /* write an end-of-file record */ 1465 error = st_write_filemarks(st, number, flags); 1466 break; 1467 case MTBSF: /* backward space file */ 1468 number = -number; 1469 case MTFSF: /* forward space file */ 1470 error = st_check_eod(st, FALSE, &nmarks, flags); 1471 if (!error) 1472 error = st_space(st, number - nmarks, 1473 SP_FILEMARKS, flags); 1474 break; 1475 case MTBSR: /* backward space record */ 1476 number = -number; 1477 case MTFSR: /* forward space record */ 1478 error = st_check_eod(st, true, &nmarks, flags); 1479 if (!error) 1480 error = st_space(st, number, SP_BLKS, flags); 1481 break; 1482 case MTREW: /* rewind */ 1483 error = st_rewind(st, 0, flags); 1484 break; 1485 case MTOFFL: /* rewind and put the drive offline */ 1486 st_unmount(st, EJECT); 1487 break; 1488 case MTNOP: /* no operation, sets status only */ 1489 break; 1490 case MTRETEN: /* retension the tape */ 1491 error = st_load(st, LD_RETENSION, flags); 1492 if (!error) 1493 error = st_load(st, LD_LOAD, flags); 1494 break; 1495 case MTEOM: /* forward space to end of media */ 1496 error = st_check_eod(st, FALSE, &nmarks, flags); 1497 if (!error) 1498 error = st_space(st, 1, SP_EOM, flags); 1499 break; 1500 case MTCACHE: /* enable controller cache */ 1501 st->flags &= ~ST_DONTBUFFER; 1502 goto try_new_value; 1503 case MTNOCACHE: /* disable controller cache */ 1504 st->flags |= ST_DONTBUFFER; 1505 goto try_new_value; 1506 case MTERASE: /* erase volume */ 1507 error = st_erase(st, number, flags); 1508 break; 1509 case MTSETBSIZ: /* Set block size for device */ 1510 #ifdef NOTYET 1511 if (!(st->flags & ST_NEW_MOUNT)) { 1512 uprintf("re-mount tape before changing blocksize"); 1513 error = EINVAL; 1514 break; 1515 } 1516 #endif 1517 if (number == 0) 1518 st->flags &= ~ST_FIXEDBLOCKS; 1519 else { 1520 if ((st->blkmin || st->blkmax) && 1521 (number < st->blkmin || 1522 number > st->blkmax)) { 1523 error = EINVAL; 1524 break; 1525 } 1526 st->flags |= ST_FIXEDBLOCKS; 1527 } 1528 st->blksize = number; 1529 st->flags |= ST_BLOCK_SET; /*XXX */ 1530 goto try_new_value; 1531 1532 case MTSETDNSTY: /* Set density for device and mode */ 1533 /* 1534 * Any number >= 0 and <= 0xff is legal. Numbers 1535 * above 0x80 are 'vendor unique'. 1536 */ 1537 if (number < 0 || number > 255) { 1538 error = EINVAL; 1539 break; 1540 } else 1541 st->density = number; 1542 goto try_new_value; 1543 1544 case MTCMPRESS: 1545 error = st->ops(st, (number == 0) ? 1546 ST_OPS_CMPRSS_OFF : ST_OPS_CMPRSS_ON, 1547 XS_CTL_SILENT); 1548 break; 1549 1550 case MTEWARN: 1551 if (number) 1552 st->flags |= ST_EARLYWARN; 1553 else 1554 st->flags &= ~ST_EARLYWARN; 1555 break; 1556 1557 default: 1558 error = EINVAL; 1559 } 1560 break; 1561 } 1562 case MTIOCIEOT: 1563 case MTIOCEEOT: 1564 break; 1565 1566 case MTIOCRDSPOS: 1567 error = st_rdpos(st, 0, (u_int32_t *) arg); 1568 break; 1569 1570 case MTIOCRDHPOS: 1571 error = st_rdpos(st, 1, (u_int32_t *) arg); 1572 break; 1573 1574 case MTIOCSLOCATE: 1575 error = st_setpos(st, 0, (u_int32_t *) arg); 1576 break; 1577 1578 case MTIOCHLOCATE: 1579 error = st_setpos(st, 1, (u_int32_t *) arg); 1580 break; 1581 1582 1583 default: 1584 error = scsipi_do_ioctl(st->sc_periph, dev, cmd, arg, 1585 flag, l); 1586 break; 1587 } 1588 return (error); 1589 /*-----------------------------*/ 1590 try_new_value: 1591 /* 1592 * Check that the mode being asked for is aggreeable to the 1593 * drive. If not, put it back the way it was. 1594 * 1595 * If in control mode, we can make (persistent) mode changes 1596 * even if no medium is loaded (see st(4)). 1597 */ 1598 if ((STMODE(dev) != CTRL_MODE || (st->flags & ST_MOUNTED) != 0) && 1599 (error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 1600 /* put it back as it was */ 1601 aprint_error_dev(&st->sc_dev, "cannot set selected mode\n"); 1602 st->density = hold_density; 1603 st->blksize = hold_blksize; 1604 if (st->blksize) 1605 st->flags |= ST_FIXEDBLOCKS; 1606 else 1607 st->flags &= ~ST_FIXEDBLOCKS; 1608 return (error); 1609 } 1610 /* 1611 * As the drive liked it, if we are setting a new default, 1612 * set it into the structures as such. 1613 * 1614 * The means for deciding this are not finalised yet- but 1615 * if the device was opened in Control Mode, the values 1616 * are persistent now across mounts. 1617 */ 1618 if (STMODE(dev) == CTRL_MODE) { 1619 switch ((short) (mt->mt_op)) { 1620 case MTSETBSIZ: 1621 st->modes[dsty].blksize = st->blksize; 1622 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1623 break; 1624 case MTSETDNSTY: 1625 st->modes[dsty].density = st->density; 1626 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1627 break; 1628 } 1629 } 1630 return (0); 1631 } 1632 1633 /* 1634 * Do a synchronous read. 1635 */ 1636 static int 1637 st_read(struct st_softc *st, char *bf, int size, int flags) 1638 { 1639 struct scsi_rw_tape cmd; 1640 1641 /* 1642 * If it's a null transfer, return immediatly 1643 */ 1644 if (size == 0) 1645 return (0); 1646 memset(&cmd, 0, sizeof(cmd)); 1647 cmd.opcode = READ; 1648 if (st->flags & ST_FIXEDBLOCKS) { 1649 cmd.byte2 |= SRW_FIXED; 1650 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1651 cmd.len); 1652 } else 1653 _lto3b(size, cmd.len); 1654 return (scsipi_command(st->sc_periph, 1655 (void *)&cmd, sizeof(cmd), (void *)bf, size, 0, ST_IO_TIME, NULL, 1656 flags | XS_CTL_DATA_IN)); 1657 } 1658 1659 /* 1660 * issue an erase command 1661 */ 1662 static int 1663 st_erase(struct st_softc *st, int full, int flags) 1664 { 1665 int tmo; 1666 struct scsi_erase cmd; 1667 1668 /* 1669 * Full erase means set LONG bit in erase command, which asks 1670 * the drive to erase the entire unit. Without this bit, we're 1671 * asking the drive to write an erase gap. 1672 */ 1673 memset(&cmd, 0, sizeof(cmd)); 1674 cmd.opcode = ERASE; 1675 if (full) { 1676 cmd.byte2 = SE_LONG; 1677 tmo = ST_SPC_TIME; 1678 } else { 1679 tmo = ST_IO_TIME; 1680 } 1681 1682 /* 1683 * XXX We always do this asynchronously, for now, unless the device 1684 * has the ST_Q_ERASE_NOIMM quirk. How long should we wait if we 1685 * want to (eventually) to it synchronously? 1686 */ 1687 if ((st->quirks & ST_Q_ERASE_NOIMM) == 0) 1688 cmd.byte2 |= SE_IMMED; 1689 1690 return (scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1691 ST_RETRIES, tmo, NULL, flags)); 1692 } 1693 1694 /* 1695 * skip N blocks/filemarks/seq filemarks/eom 1696 */ 1697 static int 1698 st_space(struct st_softc *st, int number, u_int what, int flags) 1699 { 1700 struct scsi_space cmd; 1701 int error; 1702 1703 switch (what) { 1704 case SP_BLKS: 1705 if (st->flags & ST_PER_ACTION) { 1706 if (number > 0) { 1707 st->flags &= ~ST_PER_ACTION; 1708 return (EIO); 1709 } else if (number < 0) { 1710 if (st->flags & ST_AT_FILEMARK) { 1711 /* 1712 * Handling of ST_AT_FILEMARK 1713 * in st_space will fill in the 1714 * right file mark count. 1715 */ 1716 error = st_space(st, 0, SP_FILEMARKS, 1717 flags); 1718 if (error) 1719 return (error); 1720 } 1721 if (st->flags & ST_BLANK_READ) { 1722 st->flags &= ~ST_BLANK_READ; 1723 return (EIO); 1724 } 1725 st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); 1726 } 1727 } 1728 break; 1729 case SP_FILEMARKS: 1730 if (st->flags & ST_EIO_PENDING) { 1731 if (number > 0) { 1732 /* pretend we just discovered the error */ 1733 st->flags &= ~ST_EIO_PENDING; 1734 return (EIO); 1735 } else if (number < 0) { 1736 /* back away from the error */ 1737 st->flags &= ~ST_EIO_PENDING; 1738 } 1739 } 1740 if (st->flags & ST_AT_FILEMARK) { 1741 st->flags &= ~ST_AT_FILEMARK; 1742 number--; 1743 } 1744 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 1745 /* back away from unwritten tape */ 1746 st->flags &= ~ST_BLANK_READ; 1747 number++; /* XXX dubious */ 1748 } 1749 break; 1750 case SP_EOM: 1751 if (st->flags & ST_EOM_PENDING) { 1752 /* we're already there */ 1753 st->flags &= ~ST_EOM_PENDING; 1754 return (0); 1755 } 1756 if (st->flags & ST_EIO_PENDING) { 1757 /* pretend we just discovered the error */ 1758 st->flags &= ~ST_EIO_PENDING; 1759 return (EIO); 1760 } 1761 if (st->flags & ST_AT_FILEMARK) 1762 st->flags &= ~ST_AT_FILEMARK; 1763 break; 1764 } 1765 if (number == 0) 1766 return (0); 1767 1768 memset(&cmd, 0, sizeof(cmd)); 1769 cmd.opcode = SPACE; 1770 cmd.byte2 = what; 1771 _lto3b(number, cmd.number); 1772 1773 st->flags &= ~ST_POSUPDATED; 1774 st->last_ctl_resid = 0; 1775 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1776 0, ST_SPC_TIME, NULL, flags); 1777 1778 if (error == 0 && (st->flags & ST_POSUPDATED) == 0) { 1779 number = number - st->last_ctl_resid; 1780 if (what == SP_BLKS) { 1781 if (st->blkno != -1) { 1782 st->blkno += number; 1783 } 1784 } else if (what == SP_FILEMARKS) { 1785 if (st->fileno != -1) { 1786 st->fileno += number; 1787 if (number > 0) { 1788 st->blkno = 0; 1789 } else if (number < 0) { 1790 st->blkno = -1; 1791 } 1792 } 1793 } else if (what == SP_EOM) { 1794 /* 1795 * This loses us relative position. 1796 */ 1797 st->fileno = st->blkno = -1; 1798 } 1799 } 1800 return (error); 1801 } 1802 1803 /* 1804 * write N filemarks 1805 */ 1806 static int 1807 st_write_filemarks(struct st_softc *st, int number, int flags) 1808 { 1809 int error; 1810 struct scsi_write_filemarks cmd; 1811 1812 /* 1813 * It's hard to write a negative number of file marks. 1814 * Don't try. 1815 */ 1816 if (number < 0) 1817 return (EINVAL); 1818 switch (number) { 1819 case 0: /* really a command to sync the drive's buffers */ 1820 break; 1821 case 1: 1822 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 1823 st->flags &= ~ST_WRITTEN; 1824 else 1825 st->flags |= ST_FM_WRITTEN; 1826 st->flags &= ~ST_PER_ACTION; 1827 break; 1828 default: 1829 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 1830 } 1831 1832 memset(&cmd, 0, sizeof(cmd)); 1833 cmd.opcode = WRITE_FILEMARKS; 1834 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1835 cmd.byte2 = SR_IMMED; 1836 /* 1837 * The ATAPI Onstream DI-30 doesn't support writing filemarks, but 1838 * WRITE_FILEMARKS is still used to flush the buffer 1839 */ 1840 if ((st->quirks & ST_Q_NOFILEMARKS) == 0) 1841 _lto3b(number, cmd.number); 1842 1843 /* XXX WE NEED TO BE ABLE TO GET A RESIDIUAL XXX */ 1844 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1845 0, ST_IO_TIME * 4, NULL, flags); 1846 if (error == 0 && st->fileno != -1) { 1847 st->fileno += number; 1848 } 1849 return (error); 1850 } 1851 1852 /* 1853 * Make sure the right number of file marks is on tape if the 1854 * tape has been written. If the position argument is true, 1855 * leave the tape positioned where it was originally. 1856 * 1857 * nmarks returns the number of marks to skip (or, if position 1858 * true, which were skipped) to get back original position. 1859 */ 1860 static int 1861 st_check_eod(struct st_softc *st, boolean position, int *nmarks, int flags) 1862 { 1863 int error; 1864 1865 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 1866 default: 1867 *nmarks = 0; 1868 return (0); 1869 case ST_WRITTEN: 1870 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 1871 *nmarks = 1; 1872 break; 1873 case ST_WRITTEN | ST_2FM_AT_EOD: 1874 *nmarks = 2; 1875 } 1876 error = st_write_filemarks(st, *nmarks, flags); 1877 if (position && !error) 1878 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 1879 return (error); 1880 } 1881 1882 /* 1883 * load/unload/retension 1884 */ 1885 static int 1886 st_load(struct st_softc *st, u_int type, int flags) 1887 { 1888 int error; 1889 struct scsi_load cmd; 1890 1891 if (type != LD_LOAD) { 1892 int nmarks; 1893 1894 error = st_check_eod(st, FALSE, &nmarks, flags); 1895 if (error) { 1896 aprint_error_dev(&st->sc_dev, "failed to write closing filemarks at " 1897 "unload, errno=%d\n", error); 1898 return (error); 1899 } 1900 } 1901 if (st->quirks & ST_Q_IGNORE_LOADS) { 1902 if (type == LD_LOAD) { 1903 /* 1904 * If we ignore loads, at least we should try a rewind. 1905 */ 1906 return st_rewind(st, 0, flags); 1907 } 1908 /* otherwise, we should do what's asked of us */ 1909 } 1910 1911 memset(&cmd, 0, sizeof(cmd)); 1912 cmd.opcode = LOAD; 1913 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1914 cmd.byte2 = SR_IMMED; 1915 cmd.how = type; 1916 1917 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1918 ST_RETRIES, ST_SPC_TIME, NULL, flags); 1919 if (error) { 1920 aprint_error_dev(&st->sc_dev, "error %d in st_load (op %d)\n", 1921 error, type); 1922 } 1923 return (error); 1924 } 1925 1926 /* 1927 * Rewind the device 1928 */ 1929 static int 1930 st_rewind(struct st_softc *st, u_int immediate, int flags) 1931 { 1932 struct scsi_rewind cmd; 1933 int error; 1934 int nmarks; 1935 int timeout; 1936 1937 error = st_check_eod(st, FALSE, &nmarks, flags); 1938 if (error) { 1939 aprint_error_dev(&st->sc_dev, "failed to write closing filemarks at " 1940 "rewind, errno=%d\n", error); 1941 return (error); 1942 } 1943 st->flags &= ~ST_PER_ACTION; 1944 1945 /* If requestor asked for immediate response, set a short timeout */ 1946 timeout = immediate ? ST_CTL_TIME : ST_SPC_TIME; 1947 1948 /* 1949 * ATAPI tapes always need immediate to be set 1950 */ 1951 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1952 immediate = SR_IMMED; 1953 1954 memset(&cmd, 0, sizeof(cmd)); 1955 cmd.opcode = REWIND; 1956 cmd.byte2 = immediate; 1957 1958 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1959 ST_RETRIES, timeout, NULL, flags); 1960 if (error) { 1961 aprint_error_dev(&st->sc_dev, "error %d trying to rewind\n", 1962 error); 1963 /* lost position */ 1964 st->fileno = st->blkno = -1; 1965 } else { 1966 st->fileno = st->blkno = 0; 1967 } 1968 return (error); 1969 } 1970 1971 static int 1972 st_rdpos(struct st_softc *st, int hard, u_int32_t *blkptr) 1973 { 1974 int error; 1975 u_int8_t posdata[20]; 1976 struct scsi_tape_read_position cmd; 1977 1978 /* 1979 * We try and flush any buffered writes here if we were writing 1980 * and we're trying to get hardware block position. It eats 1981 * up performance substantially, but I'm wary of drive firmware. 1982 * 1983 * I think that *logical* block position is probably okay- 1984 * but hardware block position might have to wait for data 1985 * to hit media to be valid. Caveat Emptor. 1986 */ 1987 1988 if (hard && (st->flags & ST_WRITTEN)) { 1989 /* 1990 * First flush any pending writes... 1991 */ 1992 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 1993 /* 1994 * The latter case is for 'write protected' tapes 1995 * which are too stupid to recognize a zero count 1996 * for writing filemarks as a no-op. 1997 */ 1998 if (error != 0 && error != EACCES && error != EROFS) 1999 return (error); 2000 } 2001 2002 memset(&cmd, 0, sizeof(cmd)); 2003 memset(&posdata, 0, sizeof(posdata)); 2004 cmd.opcode = READ_POSITION; 2005 if (hard) 2006 cmd.byte1 = 1; 2007 2008 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 2009 (void *)&posdata, sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, 2010 XS_CTL_SILENT | XS_CTL_DATA_IN); 2011 2012 if (error == 0) { 2013 #if 0 2014 printf("posdata:"); 2015 for (hard = 0; hard < sizeof(posdata); hard++) 2016 printf("%02x ", posdata[hard] & 0xff); 2017 printf("\n"); 2018 #endif 2019 if (posdata[0] & 0x4) /* Block Position Unknown */ 2020 error = EINVAL; 2021 else 2022 *blkptr = _4btol(&posdata[4]); 2023 } 2024 return (error); 2025 } 2026 2027 static int 2028 st_setpos(struct st_softc *st, int hard, u_int32_t *blkptr) 2029 { 2030 int error; 2031 struct scsi_tape_locate cmd; 2032 2033 /* 2034 * We used to try and flush any buffered writes here. 2035 * Now we push this onto user applications to either 2036 * flush the pending writes themselves (via a zero count 2037 * WRITE FILEMARKS command) or they can trust their tape 2038 * drive to do this correctly for them. 2039 * 2040 * There are very ugly performance limitations otherwise. 2041 */ 2042 2043 memset(&cmd, 0, sizeof(cmd)); 2044 cmd.opcode = LOCATE; 2045 if (hard) 2046 cmd.byte2 = 1 << 2; 2047 _lto4b(*blkptr, cmd.blkaddr); 2048 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 2049 ST_RETRIES, ST_SPC_TIME, NULL, 0); 2050 /* 2051 * Note file && block number position now unknown (if 2052 * these things ever start being maintained in this driver) 2053 */ 2054 st->fileno = st->blkno = -1; 2055 return (error); 2056 } 2057 2058 2059 /* 2060 * Look at the returned sense and act on the error and determine 2061 * the unix error number to pass back..., 0 (== report no error), 2062 * -1 = retry the operation, -2 continue error processing. 2063 */ 2064 static int 2065 st_interpret_sense(struct scsipi_xfer *xs) 2066 { 2067 struct scsipi_periph *periph = xs->xs_periph; 2068 struct scsi_sense_data *sense = &xs->sense.scsi_sense; 2069 struct buf *bp = xs->bp; 2070 struct st_softc *st = (void *)periph->periph_dev; 2071 int retval = EJUSTRETURN; 2072 int doprint = ((xs->xs_control & XS_CTL_SILENT) == 0); 2073 u_int8_t key; 2074 int32_t info; 2075 2076 /* 2077 * If it isn't a extended or extended/deferred error, let 2078 * the generic code handle it. 2079 */ 2080 if (SSD_RCODE(sense->response_code) != SSD_RCODE_CURRENT && 2081 SSD_RCODE(sense->response_code) != SSD_RCODE_DEFERRED) 2082 return (retval); 2083 2084 if (sense->response_code & SSD_RCODE_VALID) 2085 info = _4btol(sense->info); 2086 else 2087 info = (st->flags & ST_FIXEDBLOCKS) ? 2088 xs->datalen / st->blksize : xs->datalen; 2089 key = SSD_SENSE_KEY(sense->flags); 2090 st->mt_erreg = key; 2091 st->asc = sense->asc; 2092 st->ascq = sense->ascq; 2093 st->mt_resid = (short) info; 2094 2095 if (key == SKEY_NOT_READY && st->asc == 0x4 && st->ascq == 0x1) { 2096 /* Not Ready, Logical Unit Is in Process Of Becoming Ready */ 2097 if (!callout_pending(&periph->periph_callout)) 2098 scsipi_periph_freeze(periph, 1); 2099 callout_reset(&periph->periph_callout, 2100 hz, scsipi_periph_timed_thaw, periph); 2101 return (ERESTART); 2102 } 2103 2104 /* 2105 * If the device is not open yet, let generic handle 2106 */ 2107 if ((periph->periph_flags & PERIPH_OPEN) == 0) { 2108 return (retval); 2109 } 2110 2111 xs->resid = info; 2112 if (st->flags & ST_FIXEDBLOCKS) { 2113 if (bp) { 2114 xs->resid *= st->blksize; 2115 st->last_io_resid = xs->resid; 2116 } else { 2117 st->last_ctl_resid = xs->resid; 2118 } 2119 if (key == SKEY_VOLUME_OVERFLOW) { 2120 st->flags |= ST_EIO_PENDING; 2121 if (bp) 2122 bp->b_resid = xs->resid; 2123 } else if (sense->flags & SSD_EOM) { 2124 if ((st->flags & ST_EARLYWARN) == 0) 2125 st->flags |= ST_EIO_PENDING; 2126 st->flags |= ST_EOM_PENDING; 2127 if (bp) { 2128 #if 0 2129 bp->b_resid = xs->resid; 2130 #else 2131 /* 2132 * Grotesque as it seems, the few times 2133 * I've actually seen a non-zero resid, 2134 * the tape drive actually lied and had 2135 * written all the data! 2136 */ 2137 bp->b_resid = 0; 2138 #endif 2139 } 2140 } 2141 if (sense->flags & SSD_FILEMARK) { 2142 st->flags |= ST_AT_FILEMARK; 2143 if (bp) 2144 bp->b_resid = xs->resid; 2145 if (st->fileno != (daddr_t) -1) { 2146 st->fileno++; 2147 st->blkno = 0; 2148 st->flags |= ST_POSUPDATED; 2149 } 2150 } 2151 if (sense->flags & SSD_ILI) { 2152 st->flags |= ST_EIO_PENDING; 2153 if (bp) 2154 bp->b_resid = xs->resid; 2155 if (sense->response_code & SSD_RCODE_VALID && 2156 (xs->xs_control & XS_CTL_SILENT) == 0) 2157 aprint_error_dev(&st->sc_dev, "block wrong size, %d blocks " 2158 "residual\n", info); 2159 2160 /* 2161 * This quirk code helps the drive read 2162 * the first tape block, regardless of 2163 * format. That is required for these 2164 * drives to return proper MODE SENSE 2165 * information. 2166 */ 2167 if ((st->quirks & ST_Q_SENSE_HELP) && 2168 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 2169 st->blksize -= 512; 2170 else if ((st->flags & ST_POSUPDATED) == 0) { 2171 if (st->blkno != (daddr_t) -1) { 2172 st->blkno += 2173 (xs->datalen / st->blksize); 2174 st->flags |= ST_POSUPDATED; 2175 } 2176 } 2177 } 2178 /* 2179 * If data wanted and no data was transferred, do it immediately 2180 */ 2181 if (xs->datalen && xs->resid >= xs->datalen) { 2182 if (st->flags & ST_EIO_PENDING) 2183 return (EIO); 2184 if (st->flags & ST_AT_FILEMARK) { 2185 if (bp) 2186 bp->b_resid = xs->resid; 2187 return (0); 2188 } 2189 } 2190 } else { /* must be variable mode */ 2191 if (bp) { 2192 st->last_io_resid = xs->resid; 2193 } else { 2194 st->last_ctl_resid = xs->resid; 2195 } 2196 if (sense->flags & SSD_EOM) { 2197 /* 2198 * The current semantics of this 2199 * driver requires EOM detection 2200 * to return EIO unless early 2201 * warning detection is enabled 2202 * for variable mode (this is always 2203 * on for fixed block mode). 2204 */ 2205 if (st->flags & ST_EARLYWARN) { 2206 st->flags |= ST_EOM_PENDING; 2207 retval = 0; 2208 } else { 2209 retval = EIO; 2210 /* 2211 * If we return an error we can't claim to 2212 * have transfered all data. 2213 */ 2214 if (xs->resid == 0) 2215 xs->resid = xs->datalen; 2216 } 2217 2218 /* 2219 * If it's an unadorned EOM detection, 2220 * suppress printing an error. 2221 */ 2222 if (key == SKEY_NO_SENSE) { 2223 doprint = 0; 2224 } 2225 } else if (sense->flags & SSD_FILEMARK) { 2226 retval = 0; 2227 if (st->fileno != (daddr_t) -1) { 2228 st->fileno++; 2229 st->blkno = 0; 2230 st->flags |= ST_POSUPDATED; 2231 } 2232 } else if (sense->flags & SSD_ILI) { 2233 if (info < 0) { 2234 /* 2235 * The tape record was bigger than the read 2236 * we issued. 2237 */ 2238 if ((xs->xs_control & XS_CTL_SILENT) == 0) { 2239 aprint_error_dev(&st->sc_dev, 2240 "%d-byte tape record too big" 2241 " for %d-byte user buffer\n", 2242 xs->datalen - info, xs->datalen); 2243 } 2244 retval = EIO; 2245 } else { 2246 retval = 0; 2247 if (st->blkno != (daddr_t) -1) { 2248 st->blkno++; 2249 st->flags |= ST_POSUPDATED; 2250 } 2251 } 2252 } 2253 if (bp) 2254 bp->b_resid = xs->resid; 2255 } 2256 2257 #ifndef SCSIPI_DEBUG 2258 if (retval == 0 && key == SKEY_NO_SENSE) 2259 doprint = 0; 2260 #endif 2261 if (key == SKEY_BLANK_CHECK) { 2262 /* 2263 * This quirk code helps the drive read the 2264 * first tape block, regardless of format. That 2265 * is required for these drives to return proper 2266 * MODE SENSE information. 2267 */ 2268 if ((st->quirks & ST_Q_SENSE_HELP) && 2269 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 2270 /* still starting */ 2271 st->blksize -= 512; 2272 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 2273 st->flags |= ST_BLANK_READ; 2274 xs->resid = xs->datalen; 2275 if (bp) { 2276 bp->b_resid = xs->resid; 2277 /* return an EOF */ 2278 } 2279 retval = 0; 2280 /* lost position */ 2281 st->fileno = st->blkno = -1; 2282 } 2283 } 2284 2285 /* 2286 * If generic sense processing will continue, we should not 2287 * print sense info here. 2288 */ 2289 if (retval == EJUSTRETURN) 2290 doprint = 0; 2291 2292 if (doprint) { 2293 #ifdef SCSIVERBOSE 2294 scsipi_print_sense(xs, 0); 2295 #else 2296 scsipi_printaddr(periph); 2297 printf("Sense Key 0x%02x", key); 2298 if ((sense->response_code & SSD_RCODE_VALID) != 0) { 2299 switch (key) { 2300 case SKEY_NOT_READY: 2301 case SKEY_ILLEGAL_REQUEST: 2302 case SKEY_UNIT_ATTENTION: 2303 case SKEY_DATA_PROTECT: 2304 break; 2305 case SKEY_VOLUME_OVERFLOW: 2306 case SKEY_BLANK_CHECK: 2307 printf(", requested size: %d (decimal)", info); 2308 break; 2309 case SKEY_ABORTED_COMMAND: 2310 if (xs->xs_retries) 2311 printf(", retrying"); 2312 printf(", cmd 0x%x, info 0x%x", 2313 xs->cmd->opcode, info); 2314 break; 2315 default: 2316 printf(", info = %d (decimal)", info); 2317 } 2318 } 2319 if (sense->extra_len != 0) { 2320 int n; 2321 printf(", data ="); 2322 for (n = 0; n < sense->extra_len; n++) 2323 printf(" %02x", sense->csi[n]); 2324 } 2325 printf("\n"); 2326 #endif 2327 } 2328 return (retval); 2329 } 2330 2331 /* 2332 * The quirk here is that the drive returns some value to st_mode_sense 2333 * incorrectly until the tape has actually passed by the head. 2334 * 2335 * The method is to set the drive to large fixed-block state (user-specified 2336 * density and 1024-byte blocks), then read and rewind to get it to sense the 2337 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 2338 * work, as a last resort, try variable- length blocks. The result will be 2339 * the ability to do an accurate st_mode_sense. 2340 * 2341 * We know we can do a rewind because we just did a load, which implies rewind. 2342 * Rewind seems preferable to space backward if we have a virgin tape. 2343 * 2344 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 2345 * error processing, both part of st_interpret_sense. 2346 */ 2347 static int 2348 st_touch_tape(struct st_softc *st) 2349 { 2350 char *bf; 2351 int readsize; 2352 int error; 2353 2354 bf = malloc(1024, M_TEMP, M_NOWAIT); 2355 if (bf == NULL) 2356 return (ENOMEM); 2357 2358 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 2359 goto bad; 2360 2361 /* 2362 * If the block size is already known from the 2363 * sense data, use it. Else start probing at 1024. 2364 */ 2365 if (st->media_blksize > 0) 2366 st->blksize = st->media_blksize; 2367 else 2368 st->blksize = 1024; 2369 2370 do { 2371 switch (st->blksize) { 2372 case 512: 2373 case 1024: 2374 readsize = st->blksize; 2375 st->flags |= ST_FIXEDBLOCKS; 2376 break; 2377 default: 2378 readsize = 1; 2379 st->flags &= ~ST_FIXEDBLOCKS; 2380 } 2381 if ((error = st->ops(st, ST_OPS_MODESELECT, XS_CTL_SILENT)) 2382 != 0) { 2383 /* 2384 * The device did not agree with the proposed 2385 * block size. If we exhausted our options, 2386 * return failure, else try another. 2387 */ 2388 if (readsize == 1) 2389 goto bad; 2390 st->blksize -= 512; 2391 continue; 2392 } 2393 st_read(st, bf, readsize, XS_CTL_SILENT); /* XXX */ 2394 if ((error = st_rewind(st, 0, 0)) != 0) { 2395 bad: free(bf, M_TEMP); 2396 return (error); 2397 } 2398 } while (readsize != 1 && readsize > st->blksize); 2399 2400 free(bf, M_TEMP); 2401 return (0); 2402 } 2403 2404 static int 2405 stdump(dev_t dev, daddr_t blkno, void *va, 2406 size_t size) 2407 { 2408 2409 /* Not implemented. */ 2410 return (ENXIO); 2411 } 2412 2413 /* 2414 * Send a filled out parameter structure to the drive to 2415 * set it into the desire modes etc. 2416 */ 2417 int 2418 st_mode_select(struct st_softc *st, int flags) 2419 { 2420 u_int select_len; 2421 struct select { 2422 struct scsi_mode_parameter_header_6 header; 2423 struct scsi_general_block_descriptor blk_desc; 2424 u_char sense_data[MAX_PAGE_0_SIZE]; 2425 } select; 2426 struct scsipi_periph *periph = st->sc_periph; 2427 2428 select_len = sizeof(select.header) + sizeof(select.blk_desc) + 2429 st->page_0_size; 2430 2431 /* 2432 * This quirk deals with drives that have only one valid mode 2433 * and think this gives them license to reject all mode selects, 2434 * even if the selected mode is the one that is supported. 2435 */ 2436 if (st->quirks & ST_Q_UNIMODAL) { 2437 SC_DEBUG(periph, SCSIPI_DB3, 2438 ("not setting density 0x%x blksize 0x%x\n", 2439 st->density, st->blksize)); 2440 return (0); 2441 } 2442 2443 /* 2444 * Set up for a mode select 2445 */ 2446 memset(&select, 0, sizeof(select)); 2447 select.header.blk_desc_len = sizeof(struct scsi_general_block_descriptor); 2448 select.header.dev_spec &= ~SMH_DSP_BUFF_MODE; 2449 select.blk_desc.density = st->density; 2450 if (st->flags & ST_DONTBUFFER) 2451 select.header.dev_spec |= SMH_DSP_BUFF_MODE_OFF; 2452 else 2453 select.header.dev_spec |= SMH_DSP_BUFF_MODE_ON; 2454 if (st->flags & ST_FIXEDBLOCKS) 2455 _lto3b(st->blksize, select.blk_desc.blklen); 2456 if (st->page_0_size) 2457 memcpy(select.sense_data, st->sense_data, st->page_0_size); 2458 2459 /* 2460 * do the command 2461 */ 2462 return scsipi_mode_select(periph, 0, &select.header, select_len, 2463 flags, ST_RETRIES, ST_CTL_TIME); 2464 } 2465
Indexes created Mon Sep 22 13:09:51 GMT 2025