st.c revision 1.221
1 /* $NetBSD: st.c,v 1.221 2012/04/19 17:45:20 bouyer 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 1.221 2012/04/19 17:45:20 bouyer 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, uint32_t *); 339 static int st_setpos(struct st_softc *, int, uint32_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, device_t self, void *aux) 360 { 361 struct st_softc *st = device_private(self); 362 struct scsipibus_attach_args *sa = aux; 363 struct scsipi_periph *periph = sa->sa_periph; 364 365 SC_DEBUG(periph, SCSIPI_DB2, ("stattach: ")); 366 st->sc_dev = self; 367 368 /* Store information needed to contact our base driver */ 369 st->sc_periph = periph; 370 periph->periph_dev = st->sc_dev; 371 periph->periph_switch = &st_switch; 372 373 /* Set initial flags */ 374 st->flags = ST_INIT_FLAGS; 375 376 /* Set up the buf queue for this device */ 377 bufq_alloc(&st->buf_queue, "fcfs", 0); 378 callout_init(&st->sc_callout, 0); 379 380 /* 381 * Check if the drive is a known criminal and take 382 * Any steps needed to bring it into line 383 */ 384 st_identify_drive(st, &sa->sa_inqbuf); 385 printf("\n"); 386 /* Use the subdriver to request information regarding the drive. */ 387 printf("%s : %s", device_xname(st->sc_dev), st->quirkdata 388 ? "quirks apply, " : ""); 389 if (scsipi_test_unit_ready(periph, 390 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE) || 391 st->ops(st, ST_OPS_MODESENSE, 392 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE)) 393 printf("drive empty\n"); 394 else { 395 printf("density code %d, ", st->media_density); 396 if (st->media_blksize > 0) 397 printf("%d-byte", st->media_blksize); 398 else 399 printf("variable"); 400 printf(" blocks, write-%s\n", 401 (st->flags & ST_READONLY) ? "protected" : "enabled"); 402 } 403 404 st->stats = iostat_alloc(IOSTAT_TAPE, parent, 405 device_xname(st->sc_dev)); 406 407 rnd_attach_source(&st->rnd_source, device_xname(st->sc_dev), 408 RND_TYPE_TAPE, 0); 409 } 410 411 int 412 stdetach(device_t self, int flags) 413 { 414 struct st_softc *st = device_private(self); 415 int s, bmaj, cmaj, mn; 416 417 /* locate the major number */ 418 bmaj = bdevsw_lookup_major(&st_bdevsw); 419 cmaj = cdevsw_lookup_major(&st_cdevsw); 420 421 /* kill any pending restart */ 422 callout_stop(&st->sc_callout); 423 424 s = splbio(); 425 426 /* Kill off any queued buffers. */ 427 bufq_drain(st->buf_queue); 428 429 bufq_free(st->buf_queue); 430 431 /* Kill off any pending commands. */ 432 scsipi_kill_pending(st->sc_periph); 433 434 splx(s); 435 436 /* Nuke the vnodes for any open instances */ 437 mn = STUNIT(device_unit(self)); 438 vdevgone(bmaj, mn, mn+STNMINOR-1, VBLK); 439 vdevgone(cmaj, mn, mn+STNMINOR-1, VCHR); 440 441 iostat_free(st->stats); 442 443 /* Unhook the entropy source. */ 444 rnd_detach_source(&st->rnd_source); 445 446 return 0; 447 } 448 449 /* 450 * Use the inquiry routine in 'scsi_base' to get drive info so we can 451 * Further tailor our behaviour. 452 */ 453 static void 454 st_identify_drive(struct st_softc *st, struct scsipi_inquiry_pattern *inqbuf) 455 { 456 const struct st_quirk_inquiry_pattern *finger; 457 int priority; 458 459 finger = scsipi_inqmatch(inqbuf, 460 st_quirk_patterns, 461 sizeof(st_quirk_patterns) / sizeof(st_quirk_patterns[0]), 462 sizeof(st_quirk_patterns[0]), &priority); 463 if (priority != 0) { 464 st->quirkdata = &finger->quirkdata; 465 st->drive_quirks = finger->quirkdata.quirks; 466 st->quirks = finger->quirkdata.quirks; /* start value */ 467 st->page_0_size = finger->quirkdata.page_0_size; 468 KASSERT(st->page_0_size <= MAX_PAGE_0_SIZE); 469 st_loadquirks(st); 470 } 471 } 472 473 /* 474 * initialise the subdevices to the default (QUIRK) state. 475 * this will remove any setting made by the system operator or previous 476 * operations. 477 */ 478 static void 479 st_loadquirks(struct st_softc *st) 480 { 481 const struct modes *mode; 482 struct modes *mode2; 483 int i; 484 485 mode = st->quirkdata->modes; 486 mode2 = st->modes; 487 for (i = 0; i < 4; i++) { 488 memset(mode2, 0, sizeof(struct modes)); 489 st->modeflags[i] &= ~(BLKSIZE_SET_BY_QUIRK | 490 DENSITY_SET_BY_QUIRK | BLKSIZE_SET_BY_USER | 491 DENSITY_SET_BY_USER); 492 if ((mode->quirks | st->drive_quirks) & ST_Q_FORCE_BLKSIZE) { 493 mode2->blksize = mode->blksize; 494 st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; 495 } 496 if (mode->density) { 497 mode2->density = mode->density; 498 st->modeflags[i] |= DENSITY_SET_BY_QUIRK; 499 } 500 mode2->quirks |= mode->quirks; 501 mode++; 502 mode2++; 503 } 504 } 505 506 /* open the device. */ 507 static int 508 stopen(dev_t dev, int flags, int mode, struct lwp *l) 509 { 510 u_int stmode, dsty; 511 int error, sflags, unit, tries, ntries; 512 struct st_softc *st; 513 struct scsipi_periph *periph; 514 struct scsipi_adapter *adapt; 515 516 unit = STUNIT(dev); 517 st = device_lookup_private(&st_cd, unit); 518 if (st == NULL) 519 return ENXIO; 520 521 stmode = STMODE(dev); 522 dsty = STDSTY(dev); 523 524 periph = st->sc_periph; 525 adapt = periph->periph_channel->chan_adapter; 526 527 SC_DEBUG(periph, SCSIPI_DB1, 528 ("open: dev=0x%"PRIx64" (unit %d (of %d))\n", dev, unit, 529 st_cd.cd_ndevs)); 530 531 /* Only allow one at a time */ 532 if (periph->periph_flags & PERIPH_OPEN) { 533 aprint_error_dev(st->sc_dev, "already open\n"); 534 return EBUSY; 535 } 536 537 if ((error = scsipi_adapter_addref(adapt)) != 0) 538 return error; 539 540 /* clear any latched errors. */ 541 st->mt_resid = 0; 542 st->mt_erreg = 0; 543 st->asc = 0; 544 st->ascq = 0; 545 546 /* 547 * Catch any unit attention errors. Be silent about this 548 * unless we're already mounted. We ignore media change 549 * if we're in control mode or not mounted yet. 550 */ 551 if ((st->flags & ST_MOUNTED) == 0 || stmode == CTRL_MODE) { 552 #ifdef SCSIDEBUG 553 sflags = XS_CTL_IGNORE_MEDIA_CHANGE; 554 #else 555 sflags = XS_CTL_SILENT|XS_CTL_IGNORE_MEDIA_CHANGE; 556 #endif 557 } else 558 sflags = 0; 559 560 /* 561 * If we're already mounted or we aren't configured for 562 * a mount delay, only try a test unit ready once. Otherwise, 563 * try up to ST_MOUNT_DELAY times with a rest interval of 564 * one second between each try. 565 */ 566 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0) 567 ntries = 1; 568 else 569 ntries = ST_MOUNT_DELAY; 570 571 for (error = tries = 0; tries < ntries; tries++) { 572 int slpintr, oflags; 573 574 /* 575 * If we had no error, or we're opening the control mode 576 * device, we jump out right away. 577 */ 578 error = scsipi_test_unit_ready(periph, sflags); 579 if (error == 0 || stmode == CTRL_MODE) 580 break; 581 582 /* 583 * We had an error. 584 * 585 * If we're already mounted or we aren't configured for 586 * a mount delay, or the error isn't a NOT READY error, 587 * skip to the error exit now. 588 */ 589 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0 || 590 (st->mt_key != SKEY_NOT_READY)) { 591 goto bad; 592 } 593 594 /* clear any latched errors. */ 595 st->mt_resid = 0; 596 st->mt_erreg = 0; 597 st->asc = 0; 598 st->ascq = 0; 599 600 /* 601 * Fake that we have the device open so 602 * we block other apps from getting in. 603 */ 604 oflags = periph->periph_flags; 605 periph->periph_flags |= PERIPH_OPEN; 606 607 slpintr = kpause("stload", true, hz, NULL); 608 609 periph->periph_flags = oflags; /* restore flags */ 610 if (slpintr != 0 && slpintr != EWOULDBLOCK) { 611 goto bad; 612 } 613 } 614 615 616 /* 617 * If the mode is 3 (e.g. minor = 3,7,11,15) then the device has 618 * been opened to set defaults and perform other, usually non-I/O 619 * related, operations. In this case, do a quick check to see 620 * whether the unit actually had a tape loaded (this will be known 621 * as to whether or not we got a NOT READY for the above 622 * unit attention). If a tape is there, go do a mount sequence. 623 */ 624 if (stmode == CTRL_MODE && st->mt_key == SKEY_NOT_READY) { 625 periph->periph_flags |= PERIPH_OPEN; 626 return 0; 627 } 628 629 /* 630 * If we get this far and had an error set, that means we failed 631 * to pass the 'test unit ready' test for the non-controlmode device, 632 * so we bounce the open. 633 */ 634 if (error) 635 return error; 636 637 /* Else, we're now committed to saying we're open. */ 638 periph->periph_flags |= PERIPH_OPEN; /* unit attn are now errors */ 639 640 /* 641 * If it's a different mode, or if the media has been 642 * invalidated, unmount the tape from the previous 643 * session but continue with open processing 644 */ 645 if (st->last_dsty != dsty || 646 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 647 st_unmount(st, NOEJECT); 648 649 /* 650 * If we are not mounted, then we should start a new 651 * mount session. 652 */ 653 if (!(st->flags & ST_MOUNTED)) { 654 if ((error = st_mount_tape(dev, flags)) != 0) 655 goto bad; 656 st->last_dsty = dsty; 657 } 658 if (!(st->quirks & ST_Q_NOPREVENT)) { 659 scsipi_prevent(periph, SPAMR_PREVENT_DT, 660 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 661 } 662 663 SC_DEBUG(periph, SCSIPI_DB2, ("open complete\n")); 664 return 0; 665 666 bad: 667 st_unmount(st, NOEJECT); 668 scsipi_adapter_delref(adapt); 669 periph->periph_flags &= ~PERIPH_OPEN; 670 return error; 671 } 672 673 static int 674 stclose(dev_t dev, int flags, int mode, struct lwp *l) 675 { 676 int stxx, error = 0; 677 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(dev)); 678 struct scsipi_periph *periph = st->sc_periph; 679 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 680 681 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("closing\n")); 682 683 /* 684 * Make sure that a tape opened in write-only mode will have 685 * file marks written on it when closed, even if not written to. 686 * 687 * This is for SUN compatibility. Actually, the Sun way of 688 * things is to: 689 * 690 * only write filemarks if there are fmks to be written and 691 * - open for write (possibly read/write) 692 * - the last operation was a write 693 * or: 694 * - opened for wronly 695 * - no data was written (including filemarks) 696 */ 697 698 stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); 699 if (((flags & FWRITE) && stxx == ST_WRITTEN) || 700 ((flags & O_ACCMODE) == FWRITE && stxx == 0)) { 701 int nm; 702 error = st_check_eod(st, FALSE, &nm, 0); 703 } 704 705 /* Allow robots to eject tape if needed. */ 706 scsipi_prevent(periph, SPAMR_ALLOW, 707 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 708 709 switch (STMODE(dev)) { 710 case NORMAL_MODE: 711 st_unmount(st, NOEJECT); 712 break; 713 case NOREW_MODE: 714 case CTRL_MODE: 715 /* 716 * Leave mounted unless media seems to have been removed. 717 * 718 * Otherwise, if we're to terminate a tape with more than one 719 * filemark [ and because we're not rewinding here ], backspace 720 * one filemark so that later appends will see an unbroken 721 * sequence of: 722 * 723 * file - FMK - file - FMK ... file - FMK FMK (EOM) 724 */ 725 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 726 st_unmount(st, NOEJECT); 727 } else if (error == 0) { 728 /* 729 * ST_WRITTEN was preserved from above. 730 * 731 * All we need to know here is: 732 * 733 * Were we writing this tape and was the last 734 * operation a write? 735 * 736 * Are there supposed to be 2FM at EOD? 737 * 738 * If both statements are true, then we backspace 739 * one filemark. 740 */ 741 stxx |= (st->flags & ST_2FM_AT_EOD); 742 if ((flags & FWRITE) != 0 && 743 (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { 744 error = st_space(st, -1, SP_FILEMARKS, 0); 745 } 746 } 747 break; 748 case EJECT_MODE: 749 st_unmount(st, EJECT); 750 break; 751 } 752 753 scsipi_wait_drain(periph); 754 755 scsipi_adapter_delref(adapt); 756 periph->periph_flags &= ~PERIPH_OPEN; 757 758 return error; 759 } 760 761 /* 762 * Start a new mount session. 763 * Copy in all the default parameters from the selected device mode. 764 * and try guess any that seem to be defaulted. 765 */ 766 static int 767 st_mount_tape(dev_t dev, int flags) 768 { 769 int unit; 770 u_int dsty; 771 struct st_softc *st; 772 struct scsipi_periph *periph; 773 int error = 0; 774 775 unit = STUNIT(dev); 776 dsty = STDSTY(dev); 777 st = device_lookup_private(&st_cd, unit); 778 periph = st->sc_periph; 779 780 if (st->flags & ST_MOUNTED) 781 return 0; 782 783 SC_DEBUG(periph, SCSIPI_DB1, ("mounting\n ")); 784 st->flags |= ST_NEW_MOUNT; 785 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 786 /* 787 * If the media is new, then make sure we give it a chance to 788 * to do a 'load' instruction. (We assume it is new.) 789 */ 790 if ((error = st_load(st, LD_LOAD, XS_CTL_SILENT)) != 0) 791 return error; 792 /* 793 * Throw another dummy instruction to catch 794 * 'Unit attention' errors. Many drives give 795 * these after doing a Load instruction (with 796 * the MEDIUM MAY HAVE CHANGED asc/ascq). 797 */ 798 scsipi_test_unit_ready(periph, XS_CTL_SILENT); /* XXX */ 799 800 /* 801 * Some devices can't tell you much until they have been 802 * asked to look at the media. This quirk does this. 803 */ 804 if (st->quirks & ST_Q_SENSE_HELP) 805 if ((error = st_touch_tape(st)) != 0) 806 return error; 807 /* 808 * Load the physical device parameters 809 * loads: blkmin, blkmax 810 */ 811 if ((error = st->ops(st, ST_OPS_RBL, 0)) != 0) 812 return error; 813 /* 814 * Load the media dependent parameters 815 * includes: media_blksize,media_density,numblks 816 * As we have a tape in, it should be reflected here. 817 * If not you may need the "quirk" above. 818 */ 819 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 820 return error; 821 /* 822 * If we have gained a permanent density from somewhere, 823 * then use it in preference to the one supplied by 824 * default by the driver. 825 */ 826 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 827 st->density = st->modes[dsty].density; 828 else 829 st->density = st->media_density; 830 /* 831 * If we have gained a permanent blocksize 832 * then use it in preference to the one supplied by 833 * default by the driver. 834 */ 835 st->flags &= ~ST_FIXEDBLOCKS; 836 if (st->modeflags[dsty] & 837 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 838 st->blksize = st->modes[dsty].blksize; 839 if (st->blksize) 840 st->flags |= ST_FIXEDBLOCKS; 841 } else { 842 if ((error = st_decide_mode(st, FALSE)) != 0) 843 return error; 844 } 845 if ((error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 846 /* ATAPI will return ENODEV for this, and this may be OK */ 847 if (error != ENODEV) { 848 aprint_error_dev(st->sc_dev, 849 "cannot set selected mode\n"); 850 return error; 851 } 852 } 853 st->flags &= ~ST_NEW_MOUNT; 854 st->flags |= ST_MOUNTED; 855 periph->periph_flags |= PERIPH_MEDIA_LOADED; /* move earlier? */ 856 st->blkno = st->fileno = (daddr_t) 0; 857 return 0; 858 } 859 860 /* 861 * End the present mount session. 862 * Rewind, and optionally eject the tape. 863 * Reset various flags to indicate that all new 864 * operations require another mount operation 865 */ 866 static void 867 st_unmount(struct st_softc *st, boolean eject) 868 { 869 struct scsipi_periph *periph = st->sc_periph; 870 int nmarks; 871 872 if ((st->flags & ST_MOUNTED) == 0) 873 return; 874 SC_DEBUG(periph, SCSIPI_DB1, ("unmounting\n")); 875 st_check_eod(st, FALSE, &nmarks, XS_CTL_IGNORE_NOT_READY); 876 st_rewind(st, 0, XS_CTL_IGNORE_NOT_READY); 877 878 /* 879 * Section 9.3.3 of the SCSI specs states that a device shall return 880 * the density value specified in the last succesfull MODE SELECT 881 * after an unload operation, in case it is not able to 882 * automatically determine the density of the new medium. 883 * 884 * So we instruct the device to use the default density, which will 885 * prevent the use of stale density values (in particular, 886 * in st_touch_tape(). 887 */ 888 st->density = 0; 889 if (st->ops(st, ST_OPS_MODESELECT, 0) != 0) { 890 aprint_error_dev(st->sc_dev, 891 "WARNING: cannot revert to default density\n"); 892 } 893 894 if (eject) { 895 if (!(st->quirks & ST_Q_NOPREVENT)) { 896 scsipi_prevent(periph, SPAMR_ALLOW, 897 XS_CTL_IGNORE_ILLEGAL_REQUEST | 898 XS_CTL_IGNORE_NOT_READY); 899 } 900 st_load(st, LD_UNLOAD, XS_CTL_IGNORE_NOT_READY); 901 st->blkno = st->fileno = (daddr_t) -1; 902 } else { 903 st->blkno = st->fileno = (daddr_t) 0; 904 } 905 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 906 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 907 } 908 909 /* 910 * Given all we know about the device, media, mode, 'quirks' and 911 * initial operation, make a decision as to how we should be set 912 * to run (regarding blocking and EOD marks) 913 */ 914 int 915 st_decide_mode(struct st_softc *st, boolean first_read) 916 { 917 918 SC_DEBUG(st->sc_periph, SCSIPI_DB2, ("starting block mode decision\n")); 919 920 /* 921 * If the drive can only handle fixed-length blocks and only at 922 * one size, perhaps we should just do that. 923 */ 924 if (st->blkmin && (st->blkmin == st->blkmax)) { 925 st->flags |= ST_FIXEDBLOCKS; 926 st->blksize = st->blkmin; 927 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 928 ("blkmin == blkmax of %d\n", st->blkmin)); 929 goto done; 930 } 931 /* 932 * If the tape density mandates (or even suggests) use of fixed 933 * or variable-length blocks, comply. 934 */ 935 switch (st->density) { 936 case HALFINCH_800: 937 case HALFINCH_1600: 938 case HALFINCH_6250: 939 case DDS: 940 st->flags &= ~ST_FIXEDBLOCKS; 941 st->blksize = 0; 942 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 943 ("density specified variable\n")); 944 goto done; 945 case QIC_11: 946 case QIC_24: 947 case QIC_120: 948 case QIC_150: 949 case QIC_525: 950 case QIC_1320: 951 case QIC_3095: 952 case QIC_3220: 953 st->flags |= ST_FIXEDBLOCKS; 954 if (st->media_blksize > 0) 955 st->blksize = st->media_blksize; 956 else 957 st->blksize = DEF_FIXED_BSIZE; 958 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 959 ("density specified fixed\n")); 960 goto done; 961 } 962 /* 963 * If we're about to read the tape, perhaps we should choose 964 * fixed or variable-length blocks and block size according to 965 * what the drive found on the tape. 966 */ 967 if (first_read && 968 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 969 (st->media_blksize == DEF_FIXED_BSIZE) || 970 (st->media_blksize == 1024))) { 971 if (st->media_blksize > 0) 972 st->flags |= ST_FIXEDBLOCKS; 973 else 974 st->flags &= ~ST_FIXEDBLOCKS; 975 st->blksize = st->media_blksize; 976 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 977 ("Used media_blksize of %d\n", st->media_blksize)); 978 goto done; 979 } 980 /* 981 * We're getting no hints from any direction. Choose variable- 982 * length blocks arbitrarily. 983 */ 984 st->flags &= ~ST_FIXEDBLOCKS; 985 st->blksize = 0; 986 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 987 ("Give up and default to variable mode\n")); 988 989 done: 990 /* 991 * Decide whether or not to write two file marks to signify end- 992 * of-data. Make the decision as a function of density. If 993 * the decision is not to use a second file mark, the SCSI BLANK 994 * CHECK condition code will be recognized as end-of-data when 995 * first read. 996 * (I think this should be a by-product of fixed/variable..julian) 997 */ 998 switch (st->density) { 999 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 1000 case QIC_11: 1001 case QIC_24: 1002 case QIC_120: 1003 case QIC_150: 1004 case QIC_525: 1005 case QIC_1320: 1006 case QIC_3095: 1007 case QIC_3220: 1008 st->flags &= ~ST_2FM_AT_EOD; 1009 break; 1010 default: 1011 st->flags |= ST_2FM_AT_EOD; 1012 } 1013 return 0; 1014 } 1015 1016 /* 1017 * Actually translate the requested transfer into 1018 * one the physical driver can understand 1019 * The transfer is described by a buf and will include 1020 * only one physical transfer. 1021 */ 1022 static void 1023 ststrategy(struct buf *bp) 1024 { 1025 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(bp->b_dev)); 1026 int s; 1027 1028 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1029 ("ststrategy %d bytes @ blk %" PRId64 "\n", bp->b_bcount, 1030 bp->b_blkno)); 1031 /* If it's a null transfer, return immediately */ 1032 if (bp->b_bcount == 0) 1033 goto abort; 1034 1035 /* If offset is negative, error */ 1036 if (bp->b_blkno < 0) { 1037 bp->b_error = EINVAL; 1038 goto abort; 1039 } 1040 1041 /* Odd sized request on fixed drives are verboten */ 1042 if (st->flags & ST_FIXEDBLOCKS) { 1043 if (bp->b_bcount % st->blksize) { 1044 aprint_error_dev(st->sc_dev, "bad request, must be multiple of %d\n", 1045 st->blksize); 1046 bp->b_error = EIO; 1047 goto abort; 1048 } 1049 } 1050 /* as are out-of-range requests on variable drives. */ 1051 else if (bp->b_bcount < st->blkmin || 1052 (st->blkmax && bp->b_bcount > st->blkmax)) { 1053 aprint_error_dev(st->sc_dev, "bad request, must be between %d and %d\n", 1054 st->blkmin, st->blkmax); 1055 bp->b_error = EIO; 1056 goto abort; 1057 } 1058 s = splbio(); 1059 1060 /* 1061 * Place it in the queue of activities for this tape 1062 * at the end (a bit silly because we only have on user.. 1063 * (but it could fork())) 1064 */ 1065 bufq_put(st->buf_queue, bp); 1066 1067 /* 1068 * Tell the device to get going on the transfer if it's 1069 * not doing anything, otherwise just wait for completion 1070 * (All a bit silly if we're only allowing 1 open but..) 1071 */ 1072 ststart(st->sc_periph); 1073 1074 splx(s); 1075 return; 1076 abort: 1077 /* 1078 * Reset the residue because we didn't do anything, 1079 * and send the buffer back as done. 1080 */ 1081 bp->b_resid = bp->b_bcount; 1082 biodone(bp); 1083 return; 1084 } 1085 1086 /* 1087 * ststart looks to see if there is a buf waiting for the device 1088 * and that the device is not already busy. If both are true, 1089 * It dequeues the buf and creates a scsi command to perform the 1090 * transfer required. The transfer request will call scsipi_done 1091 * on completion, which will in turn call this routine again 1092 * so that the next queued transfer is performed. 1093 * The bufs are queued by the strategy routine (ststrategy) 1094 * 1095 * This routine is also called after other non-queued requests 1096 * have been made of the scsi driver, to ensure that the queue 1097 * continues to be drained. 1098 * ststart() is called at splbio 1099 */ 1100 static void 1101 ststart(struct scsipi_periph *periph) 1102 { 1103 struct st_softc *st = device_private(periph->periph_dev); 1104 struct buf *bp; 1105 struct scsi_rw_tape cmd; 1106 struct scsipi_xfer *xs; 1107 int flags, error; 1108 1109 SC_DEBUG(periph, SCSIPI_DB2, ("ststart ")); 1110 /* See if there is a buf to do and we are not already doing one */ 1111 while (periph->periph_active < periph->periph_openings) { 1112 /* if a special awaits, let it proceed first */ 1113 if (periph->periph_flags & PERIPH_WAITING) { 1114 periph->periph_flags &= ~PERIPH_WAITING; 1115 wakeup((void *)periph); 1116 return; 1117 } 1118 1119 /* 1120 * If the device has been unmounted by the user 1121 * then throw away all requests until done. 1122 */ 1123 if (__predict_false((st->flags & ST_MOUNTED) == 0 || 1124 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0)) { 1125 if ((bp = bufq_get(st->buf_queue)) != NULL) { 1126 /* make sure that one implies the other.. */ 1127 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 1128 bp->b_error = EIO; 1129 bp->b_resid = bp->b_bcount; 1130 biodone(bp); 1131 continue; 1132 } else 1133 return; 1134 } 1135 1136 if ((bp = bufq_peek(st->buf_queue)) == NULL) 1137 return; 1138 1139 iostat_busy(st->stats); 1140 1141 /* 1142 * only FIXEDBLOCK devices have pending I/O or space operations. 1143 */ 1144 if (st->flags & ST_FIXEDBLOCKS) { 1145 /* 1146 * If we are at a filemark but have not reported it yet 1147 * then we should report it now 1148 */ 1149 if (st->flags & ST_AT_FILEMARK) { 1150 if ((bp->b_flags & B_READ) == B_WRITE) { 1151 /* 1152 * Handling of ST_AT_FILEMARK in 1153 * st_space will fill in the right file 1154 * mark count. 1155 * Back up over filemark 1156 */ 1157 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1158 bufq_get(st->buf_queue); 1159 bp->b_error = EIO; 1160 bp->b_resid = bp->b_bcount; 1161 biodone(bp); 1162 continue; 1163 } 1164 } else { 1165 bufq_get(st->buf_queue); 1166 bp->b_resid = bp->b_bcount; 1167 bp->b_error = 0; 1168 st->flags &= ~ST_AT_FILEMARK; 1169 biodone(bp); 1170 continue; /* seek more work */ 1171 } 1172 } 1173 } 1174 /* 1175 * If we are at EOM but have not reported it 1176 * yet then we should report it now. 1177 */ 1178 if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { 1179 bufq_get(st->buf_queue); 1180 bp->b_resid = bp->b_bcount; 1181 if (st->flags & ST_EIO_PENDING) 1182 bp->b_error = EIO; 1183 st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); 1184 biodone(bp); 1185 continue; /* seek more work */ 1186 } 1187 1188 /* Fill out the scsi command */ 1189 memset(&cmd, 0, sizeof(cmd)); 1190 flags = XS_CTL_NOSLEEP | XS_CTL_ASYNC; 1191 if ((bp->b_flags & B_READ) == B_WRITE) { 1192 cmd.opcode = WRITE; 1193 st->flags &= ~ST_FM_WRITTEN; 1194 flags |= XS_CTL_DATA_OUT; 1195 } else { 1196 cmd.opcode = READ; 1197 flags |= XS_CTL_DATA_IN; 1198 } 1199 1200 /* 1201 * Handle "fixed-block-mode" tape drives by using the 1202 * block count instead of the length. 1203 */ 1204 if (st->flags & ST_FIXEDBLOCKS) { 1205 cmd.byte2 |= SRW_FIXED; 1206 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1207 } else 1208 _lto3b(bp->b_bcount, cmd.len); 1209 1210 /* Clear 'position updated' indicator */ 1211 st->flags &= ~ST_POSUPDATED; 1212 1213 /* go ask the adapter to do all this for us */ 1214 xs = scsipi_make_xs(periph, 1215 (struct scsipi_generic *)&cmd, sizeof(cmd), 1216 (u_char *)bp->b_data, bp->b_bcount, 1217 0, ST_IO_TIME, bp, flags); 1218 if (__predict_false(xs == NULL)) { 1219 /* 1220 * out of memory. Keep this buffer in the queue, and 1221 * retry later. 1222 */ 1223 callout_reset(&st->sc_callout, hz / 2, strestart, 1224 periph); 1225 return; 1226 } 1227 /* 1228 * need to dequeue the buffer before queuing the command, 1229 * because cdstart may be called recursively from the 1230 * HBA driver 1231 */ 1232 #ifdef DIAGNOSTIC 1233 if (bufq_get(st->buf_queue) != bp) 1234 panic("ststart(): dequeued wrong buf"); 1235 #else 1236 bufq_get(st->buf_queue); 1237 #endif 1238 error = scsipi_execute_xs(xs); 1239 /* with a scsipi_xfer preallocated, scsipi_command can't fail */ 1240 KASSERT(error == 0); 1241 } /* go back and see if we can cram more work in.. */ 1242 } 1243 1244 static void 1245 strestart(void *v) 1246 { 1247 int s = splbio(); 1248 ststart((struct scsipi_periph *)v); 1249 splx(s); 1250 } 1251 1252 static void 1253 stdone(struct scsipi_xfer *xs, int error) 1254 { 1255 struct st_softc *st = device_private(xs->xs_periph->periph_dev); 1256 struct buf *bp = xs->bp; 1257 1258 if (bp) { 1259 bp->b_error = error; 1260 bp->b_resid = xs->resid; 1261 /* 1262 * buggy device ? A SDLT320 can report an info 1263 * field of 0x3de8000 on a Media Error/Write Error 1264 * for this CBD: 0x0a 00 00 80 00 00 1265 */ 1266 if (bp->b_resid > bp->b_bcount || bp->b_resid < 0) 1267 bp->b_resid = bp->b_bcount; 1268 1269 if ((bp->b_flags & B_READ) == B_WRITE) 1270 st->flags |= ST_WRITTEN; 1271 else 1272 st->flags &= ~ST_WRITTEN; 1273 1274 iostat_unbusy(st->stats, bp->b_bcount, 1275 ((bp->b_flags & B_READ) == B_READ)); 1276 1277 rnd_add_uint32(&st->rnd_source, bp->b_blkno); 1278 1279 if ((st->flags & ST_POSUPDATED) == 0) { 1280 if (error) { 1281 st->fileno = st->blkno = -1; 1282 } else if (st->blkno != -1) { 1283 if (st->flags & ST_FIXEDBLOCKS) 1284 st->blkno += 1285 (bp->b_bcount / st->blksize); 1286 else 1287 st->blkno++; 1288 } 1289 } 1290 biodone(bp); 1291 } 1292 } 1293 1294 static int 1295 stread(dev_t dev, struct uio *uio, int iomode) 1296 { 1297 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(dev)); 1298 1299 return physio(ststrategy, NULL, dev, B_READ, 1300 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio); 1301 } 1302 1303 static int 1304 stwrite(dev_t dev, struct uio *uio, int iomode) 1305 { 1306 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(dev)); 1307 1308 return physio(ststrategy, NULL, dev, B_WRITE, 1309 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio); 1310 } 1311 1312 /* 1313 * Perform special action on behalf of the user; 1314 * knows about the internals of this device 1315 */ 1316 static int 1317 stioctl(dev_t dev, u_long cmd, void *arg, int flag, struct lwp *l) 1318 { 1319 int error = 0; 1320 int unit; 1321 int number, nmarks, dsty; 1322 int flags; 1323 struct st_softc *st; 1324 int hold_blksize; 1325 uint8_t hold_density; 1326 struct mtop *mt = (struct mtop *) arg; 1327 1328 /* Find the device that the user is talking about */ 1329 flags = 0; /* give error messages, act on errors etc. */ 1330 unit = STUNIT(dev); 1331 dsty = STDSTY(dev); 1332 st = device_lookup_private(&st_cd, unit); 1333 hold_blksize = st->blksize; 1334 hold_density = st->density; 1335 1336 switch ((u_int)cmd) { 1337 case MTIOCGET: { 1338 struct mtget *g = (struct mtget *) arg; 1339 /* 1340 * (to get the current state of READONLY) 1341 */ 1342 error = st->ops(st, ST_OPS_MODESENSE, XS_CTL_SILENT); 1343 if (error) { 1344 /* 1345 * Ignore the error if in control mode; 1346 * this is mandated by st(4). 1347 */ 1348 if (STMODE(dev) != CTRL_MODE) 1349 break; 1350 error = 0; 1351 } 1352 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("[ioctl: get status]\n")); 1353 memset(g, 0, sizeof(struct mtget)); 1354 g->mt_type = MT_ISAR; /* Ultrix compat *//*? */ 1355 g->mt_blksiz = st->blksize; 1356 g->mt_density = st->density; 1357 g->mt_mblksiz[0] = st->modes[0].blksize; 1358 g->mt_mblksiz[1] = st->modes[1].blksize; 1359 g->mt_mblksiz[2] = st->modes[2].blksize; 1360 g->mt_mblksiz[3] = st->modes[3].blksize; 1361 g->mt_mdensity[0] = st->modes[0].density; 1362 g->mt_mdensity[1] = st->modes[1].density; 1363 g->mt_mdensity[2] = st->modes[2].density; 1364 g->mt_mdensity[3] = st->modes[3].density; 1365 g->mt_fileno = st->fileno; 1366 g->mt_blkno = st->blkno; 1367 if (st->flags & ST_READONLY) 1368 g->mt_dsreg |= MT_DS_RDONLY; 1369 if (st->flags & ST_MOUNTED) 1370 g->mt_dsreg |= MT_DS_MOUNTED; 1371 g->mt_resid = st->mt_resid; 1372 g->mt_erreg = st->mt_erreg; 1373 /* 1374 * clear latched errors. 1375 */ 1376 st->mt_resid = 0; 1377 st->mt_erreg = 0; 1378 st->asc = 0; 1379 st->ascq = 0; 1380 break; 1381 } 1382 case MTIOCTOP: { 1383 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1384 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1385 mt->mt_count)); 1386 1387 /* compat: in U*x it is a short */ 1388 number = mt->mt_count; 1389 switch ((short) (mt->mt_op)) { 1390 case MTWEOF: /* write an end-of-file record */ 1391 error = st_write_filemarks(st, number, flags); 1392 break; 1393 case MTBSF: /* backward space file */ 1394 number = -number; 1395 case MTFSF: /* forward space file */ 1396 error = st_check_eod(st, FALSE, &nmarks, flags); 1397 if (!error) 1398 error = st_space(st, number - nmarks, 1399 SP_FILEMARKS, flags); 1400 break; 1401 case MTBSR: /* backward space record */ 1402 number = -number; 1403 case MTFSR: /* forward space record */ 1404 error = st_check_eod(st, true, &nmarks, flags); 1405 if (!error) 1406 error = st_space(st, number, SP_BLKS, flags); 1407 break; 1408 case MTREW: /* rewind */ 1409 error = st_rewind(st, 0, flags); 1410 break; 1411 case MTOFFL: /* rewind and put the drive offline */ 1412 st_unmount(st, EJECT); 1413 break; 1414 case MTNOP: /* no operation, sets status only */ 1415 break; 1416 case MTRETEN: /* retension the tape */ 1417 error = st_load(st, LD_RETENSION, flags); 1418 if (!error) 1419 error = st_load(st, LD_LOAD, flags); 1420 break; 1421 case MTEOM: /* forward space to end of media */ 1422 error = st_check_eod(st, FALSE, &nmarks, flags); 1423 if (!error) 1424 error = st_space(st, 1, SP_EOM, flags); 1425 break; 1426 case MTCACHE: /* enable controller cache */ 1427 st->flags &= ~ST_DONTBUFFER; 1428 goto try_new_value; 1429 case MTNOCACHE: /* disable controller cache */ 1430 st->flags |= ST_DONTBUFFER; 1431 goto try_new_value; 1432 case MTERASE: /* erase volume */ 1433 error = st_erase(st, number, flags); 1434 break; 1435 case MTSETBSIZ: /* Set block size for device */ 1436 #ifdef NOTYET 1437 if (!(st->flags & ST_NEW_MOUNT)) { 1438 uprintf("re-mount tape before changing " 1439 "blocksize"); 1440 error = EINVAL; 1441 break; 1442 } 1443 #endif 1444 if (number == 0) 1445 st->flags &= ~ST_FIXEDBLOCKS; 1446 else { 1447 if ((st->blkmin || st->blkmax) && 1448 (number < st->blkmin || 1449 number > st->blkmax)) { 1450 error = EINVAL; 1451 break; 1452 } 1453 st->flags |= ST_FIXEDBLOCKS; 1454 } 1455 st->blksize = number; 1456 st->flags |= ST_BLOCK_SET; /*XXX */ 1457 goto try_new_value; 1458 case MTSETDNSTY: /* Set density for device and mode */ 1459 /* 1460 * Any number >= 0 and <= 0xff is legal. Numbers 1461 * above 0x80 are 'vendor unique'. 1462 */ 1463 if (number < 0 || number > 255) { 1464 error = EINVAL; 1465 break; 1466 } else 1467 st->density = number; 1468 goto try_new_value; 1469 case MTCMPRESS: 1470 error = st->ops(st, (number == 0) ? 1471 ST_OPS_CMPRSS_OFF : ST_OPS_CMPRSS_ON, 1472 XS_CTL_SILENT); 1473 break; 1474 case MTEWARN: 1475 if (number) 1476 st->flags |= ST_EARLYWARN; 1477 else 1478 st->flags &= ~ST_EARLYWARN; 1479 break; 1480 1481 default: 1482 error = EINVAL; 1483 } 1484 break; 1485 } 1486 case MTIOCIEOT: 1487 case MTIOCEEOT: 1488 break; 1489 case MTIOCRDSPOS: 1490 error = st_rdpos(st, 0, (uint32_t *)arg); 1491 break; 1492 case MTIOCRDHPOS: 1493 error = st_rdpos(st, 1, (uint32_t *)arg); 1494 break; 1495 case MTIOCSLOCATE: 1496 error = st_setpos(st, 0, (uint32_t *)arg); 1497 break; 1498 case MTIOCHLOCATE: 1499 error = st_setpos(st, 1, (uint32_t *)arg); 1500 break; 1501 default: 1502 error = scsipi_do_ioctl(st->sc_periph, dev, cmd, arg, flag, l); 1503 break; 1504 } 1505 return error; 1506 1507 try_new_value: 1508 /* 1509 * Check that the mode being asked for is aggreeable to the 1510 * drive. If not, put it back the way it was. 1511 * 1512 * If in control mode, we can make (persistent) mode changes 1513 * even if no medium is loaded (see st(4)). 1514 */ 1515 if ((STMODE(dev) != CTRL_MODE || (st->flags & ST_MOUNTED) != 0) && 1516 (error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 1517 /* put it back as it was */ 1518 aprint_error_dev(st->sc_dev, "cannot set selected mode\n"); 1519 st->density = hold_density; 1520 st->blksize = hold_blksize; 1521 if (st->blksize) 1522 st->flags |= ST_FIXEDBLOCKS; 1523 else 1524 st->flags &= ~ST_FIXEDBLOCKS; 1525 return error; 1526 } 1527 /* 1528 * As the drive liked it, if we are setting a new default, 1529 * set it into the structures as such. 1530 * 1531 * The means for deciding this are not finalised yet- but 1532 * if the device was opened in Control Mode, the values 1533 * are persistent now across mounts. 1534 */ 1535 if (STMODE(dev) == CTRL_MODE) { 1536 switch ((short) (mt->mt_op)) { 1537 case MTSETBSIZ: 1538 st->modes[dsty].blksize = st->blksize; 1539 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1540 break; 1541 case MTSETDNSTY: 1542 st->modes[dsty].density = st->density; 1543 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1544 break; 1545 } 1546 } 1547 return 0; 1548 } 1549 1550 /* Do a synchronous read. */ 1551 static int 1552 st_read(struct st_softc *st, char *bf, int size, int flags) 1553 { 1554 struct scsi_rw_tape cmd; 1555 1556 /* If it's a null transfer, return immediatly */ 1557 if (size == 0) 1558 return 0; 1559 memset(&cmd, 0, sizeof(cmd)); 1560 cmd.opcode = READ; 1561 if (st->flags & ST_FIXEDBLOCKS) { 1562 cmd.byte2 |= SRW_FIXED; 1563 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1564 cmd.len); 1565 } else 1566 _lto3b(size, cmd.len); 1567 return scsipi_command(st->sc_periph, 1568 (void *)&cmd, sizeof(cmd), (void *)bf, size, 0, ST_IO_TIME, NULL, 1569 flags | XS_CTL_DATA_IN); 1570 } 1571 1572 /* issue an erase command */ 1573 static int 1574 st_erase(struct st_softc *st, int full, int flags) 1575 { 1576 int tmo; 1577 struct scsi_erase cmd; 1578 1579 /* 1580 * Full erase means set LONG bit in erase command, which asks 1581 * the drive to erase the entire unit. Without this bit, we're 1582 * asking the drive to write an erase gap. 1583 */ 1584 memset(&cmd, 0, sizeof(cmd)); 1585 cmd.opcode = ERASE; 1586 if (full) { 1587 cmd.byte2 = SE_LONG; 1588 tmo = ST_SPC_TIME; 1589 } else 1590 tmo = ST_IO_TIME; 1591 1592 /* 1593 * XXX We always do this asynchronously, for now, unless the device 1594 * has the ST_Q_ERASE_NOIMM quirk. How long should we wait if we 1595 * want to (eventually) to it synchronously? 1596 */ 1597 if ((st->quirks & ST_Q_ERASE_NOIMM) == 0) 1598 cmd.byte2 |= SE_IMMED; 1599 1600 return scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1601 ST_RETRIES, tmo, NULL, flags); 1602 } 1603 1604 /* skip N blocks/filemarks/seq filemarks/eom */ 1605 static int 1606 st_space(struct st_softc *st, int number, u_int what, int flags) 1607 { 1608 struct scsi_space cmd; 1609 int error; 1610 1611 switch (what) { 1612 case SP_BLKS: 1613 if (st->flags & ST_PER_ACTION) { 1614 if (number > 0) { 1615 st->flags &= ~ST_PER_ACTION; 1616 return EIO; 1617 } else if (number < 0) { 1618 if (st->flags & ST_AT_FILEMARK) { 1619 /* 1620 * Handling of ST_AT_FILEMARK 1621 * in st_space will fill in the 1622 * right file mark count. 1623 */ 1624 error = st_space(st, 0, SP_FILEMARKS, 1625 flags); 1626 if (error) 1627 return error; 1628 } 1629 if (st->flags & ST_BLANK_READ) { 1630 st->flags &= ~ST_BLANK_READ; 1631 return EIO; 1632 } 1633 st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); 1634 } 1635 } 1636 break; 1637 case SP_FILEMARKS: 1638 if (st->flags & ST_EIO_PENDING) { 1639 if (number > 0) { 1640 /* pretend we just discovered the error */ 1641 st->flags &= ~ST_EIO_PENDING; 1642 return EIO; 1643 } else if (number < 0) { 1644 /* back away from the error */ 1645 st->flags &= ~ST_EIO_PENDING; 1646 } 1647 } 1648 if (st->flags & ST_AT_FILEMARK) { 1649 st->flags &= ~ST_AT_FILEMARK; 1650 number--; 1651 } 1652 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 1653 /* back away from unwritten tape */ 1654 st->flags &= ~ST_BLANK_READ; 1655 number++; /* XXX dubious */ 1656 } 1657 break; 1658 case SP_EOM: 1659 if (st->flags & ST_EOM_PENDING) { 1660 /* we're already there */ 1661 st->flags &= ~ST_EOM_PENDING; 1662 return 0; 1663 } 1664 if (st->flags & ST_EIO_PENDING) { 1665 /* pretend we just discovered the error */ 1666 st->flags &= ~ST_EIO_PENDING; 1667 return EIO; 1668 } 1669 if (st->flags & ST_AT_FILEMARK) 1670 st->flags &= ~ST_AT_FILEMARK; 1671 break; 1672 } 1673 if (number == 0) 1674 return 0; 1675 1676 memset(&cmd, 0, sizeof(cmd)); 1677 cmd.opcode = SPACE; 1678 cmd.byte2 = what; 1679 _lto3b(number, cmd.number); 1680 1681 st->flags &= ~ST_POSUPDATED; 1682 st->last_ctl_resid = 0; 1683 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1684 0, ST_SPC_TIME, NULL, flags); 1685 1686 if (error == 0 && (st->flags & ST_POSUPDATED) == 0) { 1687 number = number - st->last_ctl_resid; 1688 if (what == SP_BLKS) { 1689 if (st->blkno != -1) 1690 st->blkno += number; 1691 } else if (what == SP_FILEMARKS) { 1692 if (st->fileno != -1) { 1693 st->fileno += number; 1694 if (number > 0) 1695 st->blkno = 0; 1696 else if (number < 0) 1697 st->blkno = -1; 1698 } 1699 } else if (what == SP_EOM) { 1700 /* This loses us relative position. */ 1701 st->fileno = st->blkno = -1; 1702 } 1703 } 1704 return error; 1705 } 1706 1707 /* 1708 * write N filemarks 1709 */ 1710 static int 1711 st_write_filemarks(struct st_softc *st, int number, int flags) 1712 { 1713 int error; 1714 struct scsi_write_filemarks cmd; 1715 1716 /* 1717 * It's hard to write a negative number of file marks. 1718 * Don't try. 1719 */ 1720 if (number < 0) 1721 return EINVAL; 1722 switch (number) { 1723 case 0: /* really a command to sync the drive's buffers */ 1724 break; 1725 case 1: 1726 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 1727 st->flags &= ~ST_WRITTEN; 1728 else 1729 st->flags |= ST_FM_WRITTEN; 1730 st->flags &= ~ST_PER_ACTION; 1731 break; 1732 default: 1733 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 1734 } 1735 1736 memset(&cmd, 0, sizeof(cmd)); 1737 cmd.opcode = WRITE_FILEMARKS; 1738 if (SCSIPI_BUSTYPE_TYPE(scsipi_periph_bustype(st->sc_periph)) == 1739 SCSIPI_BUSTYPE_ATAPI) 1740 cmd.byte2 = SR_IMMED; 1741 /* 1742 * The ATAPI Onstream DI-30 doesn't support writing filemarks, but 1743 * WRITE_FILEMARKS is still used to flush the buffer 1744 */ 1745 if ((st->quirks & ST_Q_NOFILEMARKS) == 0) 1746 _lto3b(number, cmd.number); 1747 1748 /* XXX WE NEED TO BE ABLE TO GET A RESIDIUAL XXX */ 1749 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1750 0, ST_IO_TIME * 4, NULL, flags); 1751 if (error == 0 && st->fileno != -1) 1752 st->fileno += number; 1753 return error; 1754 } 1755 1756 /* 1757 * Make sure the right number of file marks is on tape if the 1758 * tape has been written. If the position argument is true, 1759 * leave the tape positioned where it was originally. 1760 * 1761 * nmarks returns the number of marks to skip (or, if position 1762 * true, which were skipped) to get back original position. 1763 */ 1764 static int 1765 st_check_eod(struct st_softc *st, boolean position, int *nmarks, int flags) 1766 { 1767 int error; 1768 1769 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 1770 default: 1771 *nmarks = 0; 1772 return 0; 1773 case ST_WRITTEN: 1774 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 1775 *nmarks = 1; 1776 break; 1777 case ST_WRITTEN | ST_2FM_AT_EOD: 1778 *nmarks = 2; 1779 } 1780 error = st_write_filemarks(st, *nmarks, flags); 1781 if (position && !error) 1782 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 1783 return error; 1784 } 1785 1786 /* load/unload/retension */ 1787 static int 1788 st_load(struct st_softc *st, u_int type, int flags) 1789 { 1790 int error; 1791 struct scsi_load cmd; 1792 1793 if (type != LD_LOAD) { 1794 int nmarks; 1795 1796 error = st_check_eod(st, FALSE, &nmarks, flags); 1797 if (error) { 1798 aprint_error_dev(st->sc_dev, 1799 "failed to write closing filemarks at " 1800 "unload, errno=%d\n", error); 1801 return error; 1802 } 1803 } 1804 if (st->quirks & ST_Q_IGNORE_LOADS) { 1805 if (type == LD_LOAD) 1806 /* 1807 * If we ignore loads, at least we should try a rewind. 1808 */ 1809 return st_rewind(st, 0, flags); 1810 /* otherwise, we should do what's asked of us */ 1811 } 1812 1813 memset(&cmd, 0, sizeof(cmd)); 1814 cmd.opcode = LOAD; 1815 if (SCSIPI_BUSTYPE_TYPE(scsipi_periph_bustype(st->sc_periph)) == 1816 SCSIPI_BUSTYPE_ATAPI) 1817 cmd.byte2 = SR_IMMED; 1818 cmd.how = type; 1819 1820 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1821 ST_RETRIES, ST_SPC_TIME, NULL, flags); 1822 if (error) { 1823 aprint_error_dev(st->sc_dev, "error %d in st_load (op %d)\n", 1824 error, type); 1825 } 1826 return error; 1827 } 1828 1829 /* Rewind the device */ 1830 static int 1831 st_rewind(struct st_softc *st, u_int immediate, int flags) 1832 { 1833 struct scsi_rewind cmd; 1834 int error; 1835 int nmarks; 1836 int timeout; 1837 1838 error = st_check_eod(st, FALSE, &nmarks, flags); 1839 if (error) { 1840 aprint_error_dev(st->sc_dev, 1841 "failed to write closing filemarks at " 1842 "rewind, errno=%d\n", error); 1843 return error; 1844 } 1845 st->flags &= ~ST_PER_ACTION; 1846 1847 /* If requestor asked for immediate response, set a short timeout */ 1848 timeout = immediate ? ST_CTL_TIME : ST_SPC_TIME; 1849 1850 /* ATAPI tapes always need immediate to be set */ 1851 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1852 immediate = SR_IMMED; 1853 1854 memset(&cmd, 0, sizeof(cmd)); 1855 cmd.opcode = REWIND; 1856 cmd.byte2 = immediate; 1857 1858 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1859 ST_RETRIES, timeout, NULL, flags); 1860 if (error) { 1861 aprint_error_dev(st->sc_dev, "error %d trying to rewind\n", 1862 error); 1863 /* lost position */ 1864 st->fileno = st->blkno = -1; 1865 } else 1866 st->fileno = st->blkno = 0; 1867 return error; 1868 } 1869 1870 static int 1871 st_rdpos(struct st_softc *st, int hard, uint32_t *blkptr) 1872 { 1873 int error; 1874 uint8_t posdata[20]; 1875 struct scsi_tape_read_position cmd; 1876 1877 /* 1878 * We try and flush any buffered writes here if we were writing 1879 * and we're trying to get hardware block position. It eats 1880 * up performance substantially, but I'm wary of drive firmware. 1881 * 1882 * I think that *logical* block position is probably okay- 1883 * but hardware block position might have to wait for data 1884 * to hit media to be valid. Caveat Emptor. 1885 */ 1886 1887 if (hard && (st->flags & ST_WRITTEN)) { 1888 /* First flush any pending writes... */ 1889 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 1890 /* 1891 * The latter case is for 'write protected' tapes 1892 * which are too stupid to recognize a zero count 1893 * for writing filemarks as a no-op. 1894 */ 1895 if (error != 0 && error != EACCES && error != EROFS) 1896 return error; 1897 } 1898 1899 memset(&cmd, 0, sizeof(cmd)); 1900 memset(&posdata, 0, sizeof(posdata)); 1901 cmd.opcode = READ_POSITION; 1902 if (hard) 1903 cmd.byte1 = 1; 1904 1905 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 1906 (void *)&posdata, sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, 1907 XS_CTL_SILENT | XS_CTL_DATA_IN); 1908 1909 if (error == 0) { 1910 #if 0 1911 printf("posdata:"); 1912 for (hard = 0; hard < sizeof(posdata); hard++) 1913 printf("%02x ", posdata[hard] & 0xff); 1914 printf("\n"); 1915 #endif 1916 if (posdata[0] & 0x4) /* Block Position Unknown */ 1917 error = EINVAL; 1918 else 1919 *blkptr = _4btol(&posdata[4]); 1920 } 1921 return error; 1922 } 1923 1924 static int 1925 st_setpos(struct st_softc *st, int hard, uint32_t *blkptr) 1926 { 1927 int error; 1928 struct scsi_tape_locate cmd; 1929 1930 /* 1931 * We used to try and flush any buffered writes here. 1932 * Now we push this onto user applications to either 1933 * flush the pending writes themselves (via a zero count 1934 * WRITE FILEMARKS command) or they can trust their tape 1935 * drive to do this correctly for them. 1936 * 1937 * There are very ugly performance limitations otherwise. 1938 */ 1939 1940 memset(&cmd, 0, sizeof(cmd)); 1941 cmd.opcode = LOCATE; 1942 if (hard) 1943 cmd.byte2 = 1 << 2; 1944 _lto4b(*blkptr, cmd.blkaddr); 1945 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1946 ST_RETRIES, ST_SPC_TIME, NULL, 0); 1947 /* 1948 * Note file && block number position now unknown (if 1949 * these things ever start being maintained in this driver) 1950 */ 1951 st->fileno = st->blkno = -1; 1952 return error; 1953 } 1954 1955 1956 /* 1957 * Look at the returned sense and act on the error and determine 1958 * the unix error number to pass back..., 0 (== report no error), 1959 * -1 = retry the operation, -2 continue error processing. 1960 */ 1961 static int 1962 st_interpret_sense(struct scsipi_xfer *xs) 1963 { 1964 struct scsipi_periph *periph = xs->xs_periph; 1965 struct scsi_sense_data *sense = &xs->sense.scsi_sense; 1966 struct buf *bp = xs->bp; 1967 struct st_softc *st = device_private(periph->periph_dev); 1968 int retval = EJUSTRETURN; 1969 int doprint = ((xs->xs_control & XS_CTL_SILENT) == 0); 1970 uint8_t key; 1971 int32_t info; 1972 1973 /* 1974 * If it isn't a extended or extended/deferred error, let 1975 * the generic code handle it. 1976 */ 1977 if (SSD_RCODE(sense->response_code) != SSD_RCODE_CURRENT && 1978 SSD_RCODE(sense->response_code) != SSD_RCODE_DEFERRED) 1979 return retval; 1980 1981 if (sense->response_code & SSD_RCODE_VALID) 1982 info = _4btol(sense->info); 1983 else 1984 info = (st->flags & ST_FIXEDBLOCKS) ? 1985 xs->datalen / st->blksize : xs->datalen; 1986 key = SSD_SENSE_KEY(sense->flags); 1987 st->mt_erreg = key; 1988 st->asc = sense->asc; 1989 st->ascq = sense->ascq; 1990 st->mt_resid = (short) info; 1991 1992 if (key == SKEY_NOT_READY && st->asc == 0x4 && st->ascq == 0x1) { 1993 /* Not Ready, Logical Unit Is in Process Of Becoming Ready */ 1994 if (!callout_pending(&periph->periph_callout)) 1995 scsipi_periph_freeze(periph, 1); 1996 callout_reset(&periph->periph_callout, 1997 hz, scsipi_periph_timed_thaw, periph); 1998 return ERESTART; 1999 } 2000 2001 /* If the device is not open yet, let generic handle */ 2002 if ((periph->periph_flags & PERIPH_OPEN) == 0) 2003 return retval; 2004 2005 xs->resid = info; 2006 if (st->flags & ST_FIXEDBLOCKS) { 2007 if (bp) { 2008 xs->resid *= st->blksize; 2009 st->last_io_resid = xs->resid; 2010 } else 2011 st->last_ctl_resid = xs->resid; 2012 if (key == SKEY_VOLUME_OVERFLOW) { 2013 st->flags |= ST_EIO_PENDING; 2014 if (bp) 2015 bp->b_resid = xs->resid; 2016 } else if (sense->flags & SSD_EOM) { 2017 if ((st->flags & ST_EARLYWARN) == 0) 2018 st->flags |= ST_EIO_PENDING; 2019 st->flags |= ST_EOM_PENDING; 2020 if (bp) { 2021 #if 0 2022 bp->b_resid = xs->resid; 2023 #else 2024 /* 2025 * Grotesque as it seems, the few times 2026 * I've actually seen a non-zero resid, 2027 * the tape drive actually lied and had 2028 * written all the data! 2029 */ 2030 bp->b_resid = 0; 2031 #endif 2032 } 2033 } 2034 if (sense->flags & SSD_FILEMARK) { 2035 st->flags |= ST_AT_FILEMARK; 2036 if (bp) 2037 bp->b_resid = xs->resid; 2038 if (st->fileno != (daddr_t) -1) { 2039 st->fileno++; 2040 st->blkno = 0; 2041 st->flags |= ST_POSUPDATED; 2042 } 2043 } 2044 if (sense->flags & SSD_ILI) { 2045 st->flags |= ST_EIO_PENDING; 2046 if (bp) 2047 bp->b_resid = xs->resid; 2048 if (sense->response_code & SSD_RCODE_VALID && 2049 (xs->xs_control & XS_CTL_SILENT) == 0) 2050 aprint_error_dev(st->sc_dev, 2051 "block wrong size, %d blocks residual\n", 2052 info); 2053 2054 /* 2055 * This quirk code helps the drive read 2056 * the first tape block, regardless of 2057 * format. That is required for these 2058 * drives to return proper MODE SENSE 2059 * information. 2060 */ 2061 if ((st->quirks & ST_Q_SENSE_HELP) && 2062 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 2063 st->blksize -= 512; 2064 else if ((st->flags & ST_POSUPDATED) == 0) { 2065 if (st->blkno != (daddr_t) -1) { 2066 st->blkno += 2067 (xs->datalen / st->blksize); 2068 st->flags |= ST_POSUPDATED; 2069 } 2070 } 2071 } 2072 /* 2073 * If data wanted and no data was transferred, do it immediately 2074 */ 2075 if (xs->datalen && xs->resid >= xs->datalen) { 2076 if (st->flags & ST_EIO_PENDING) 2077 return EIO; 2078 if (st->flags & ST_AT_FILEMARK) { 2079 if (bp) 2080 bp->b_resid = xs->resid; 2081 return 0; 2082 } 2083 } 2084 } else { /* must be variable mode */ 2085 if (bp) 2086 st->last_io_resid = xs->resid; 2087 else 2088 st->last_ctl_resid = xs->resid; 2089 if (sense->flags & SSD_EOM) { 2090 /* 2091 * The current semantics of this 2092 * driver requires EOM detection 2093 * to return EIO unless early 2094 * warning detection is enabled 2095 * for variable mode (this is always 2096 * on for fixed block mode). 2097 */ 2098 if (st->flags & ST_EARLYWARN) { 2099 st->flags |= ST_EOM_PENDING; 2100 retval = 0; 2101 } else { 2102 retval = EIO; 2103 /* 2104 * If we return an error we can't claim to 2105 * have transfered all data. 2106 */ 2107 if (xs->resid == 0) 2108 xs->resid = xs->datalen; 2109 } 2110 2111 /* 2112 * If it's an unadorned EOM detection, 2113 * suppress printing an error. 2114 */ 2115 if (key == SKEY_NO_SENSE) { 2116 doprint = 0; 2117 } 2118 } else if (sense->flags & SSD_FILEMARK) { 2119 retval = 0; 2120 if (st->fileno != (daddr_t) -1) { 2121 st->fileno++; 2122 st->blkno = 0; 2123 st->flags |= ST_POSUPDATED; 2124 } 2125 } else if (sense->flags & SSD_ILI) { 2126 if (info < 0) { 2127 /* 2128 * The tape record was bigger than the read 2129 * we issued. 2130 */ 2131 if ((xs->xs_control & XS_CTL_SILENT) == 0) { 2132 aprint_error_dev(st->sc_dev, 2133 "%d-byte tape record too big" 2134 " for %d-byte user buffer\n", 2135 xs->datalen - info, xs->datalen); 2136 } 2137 retval = EIO; 2138 } else { 2139 retval = 0; 2140 if (st->blkno != (daddr_t) -1) { 2141 st->blkno++; 2142 st->flags |= ST_POSUPDATED; 2143 } 2144 } 2145 } 2146 if (bp) 2147 bp->b_resid = xs->resid; 2148 } 2149 2150 #ifndef SCSIPI_DEBUG 2151 if (retval == 0 && key == SKEY_NO_SENSE) 2152 doprint = 0; 2153 #endif 2154 if (key == SKEY_BLANK_CHECK) { 2155 /* 2156 * This quirk code helps the drive read the 2157 * first tape block, regardless of format. That 2158 * is required for these drives to return proper 2159 * MODE SENSE information. 2160 */ 2161 if ((st->quirks & ST_Q_SENSE_HELP) && 2162 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 2163 /* still starting */ 2164 st->blksize -= 512; 2165 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 2166 st->flags |= ST_BLANK_READ; 2167 xs->resid = xs->datalen; 2168 if (bp) { 2169 bp->b_resid = xs->resid; 2170 /* return an EOF */ 2171 } 2172 retval = 0; 2173 /* lost position */ 2174 st->fileno = st->blkno = -1; 2175 } 2176 } 2177 2178 /* 2179 * If generic sense processing will continue, we should not 2180 * print sense info here. 2181 */ 2182 if (retval == EJUSTRETURN) 2183 doprint = 0; 2184 2185 if (doprint) { 2186 /* Print verbose sense info if possible */ 2187 if (scsipi_print_sense(xs, 0) != 0) 2188 return retval; 2189 2190 /* Print less-verbose sense info */ 2191 scsipi_printaddr(periph); 2192 printf("Sense Key 0x%02x", key); 2193 if ((sense->response_code & SSD_RCODE_VALID) != 0) { 2194 switch (key) { 2195 case SKEY_NOT_READY: 2196 case SKEY_ILLEGAL_REQUEST: 2197 case SKEY_UNIT_ATTENTION: 2198 case SKEY_DATA_PROTECT: 2199 break; 2200 case SKEY_VOLUME_OVERFLOW: 2201 case SKEY_BLANK_CHECK: 2202 printf(", requested size: %d (decimal)", info); 2203 break; 2204 case SKEY_ABORTED_COMMAND: 2205 if (xs->xs_retries) 2206 printf(", retrying"); 2207 printf(", cmd 0x%x, info 0x%x", 2208 xs->cmd->opcode, info); 2209 break; 2210 default: 2211 printf(", info = %d (decimal)", info); 2212 } 2213 } 2214 if (sense->extra_len != 0) { 2215 int n; 2216 printf(", data ="); 2217 for (n = 0; n < sense->extra_len; n++) 2218 printf(" %02x", sense->csi[n]); 2219 } 2220 printf("\n"); 2221 } 2222 return retval; 2223 } 2224 2225 /* 2226 * The quirk here is that the drive returns some value to st_mode_sense 2227 * incorrectly until the tape has actually passed by the head. 2228 * 2229 * The method is to set the drive to large fixed-block state (user-specified 2230 * density and 1024-byte blocks), then read and rewind to get it to sense the 2231 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 2232 * work, as a last resort, try variable- length blocks. The result will be 2233 * the ability to do an accurate st_mode_sense. 2234 * 2235 * We know we can do a rewind because we just did a load, which implies rewind. 2236 * Rewind seems preferable to space backward if we have a virgin tape. 2237 * 2238 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 2239 * error processing, both part of st_interpret_sense. 2240 */ 2241 static int 2242 st_touch_tape(struct st_softc *st) 2243 { 2244 char *bf; 2245 int readsize; 2246 int error; 2247 2248 bf = malloc(1024, M_TEMP, M_NOWAIT); 2249 if (bf == NULL) 2250 return ENOMEM; 2251 2252 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 2253 goto bad; 2254 2255 /* 2256 * If the block size is already known from the 2257 * sense data, use it. Else start probing at 1024. 2258 */ 2259 if (st->media_blksize > 0) 2260 st->blksize = st->media_blksize; 2261 else 2262 st->blksize = 1024; 2263 2264 do { 2265 switch (st->blksize) { 2266 case 512: 2267 case 1024: 2268 readsize = st->blksize; 2269 st->flags |= ST_FIXEDBLOCKS; 2270 break; 2271 default: 2272 readsize = 1; 2273 st->flags &= ~ST_FIXEDBLOCKS; 2274 } 2275 if ((error = st->ops(st, ST_OPS_MODESELECT, XS_CTL_SILENT)) 2276 != 0) { 2277 /* 2278 * The device did not agree with the proposed 2279 * block size. If we exhausted our options, 2280 * return failure, else try another. 2281 */ 2282 if (readsize == 1) 2283 goto bad; 2284 st->blksize -= 512; 2285 continue; 2286 } 2287 st_read(st, bf, readsize, XS_CTL_SILENT); /* XXX */ 2288 if ((error = st_rewind(st, 0, 0)) != 0) { 2289 bad: free(bf, M_TEMP); 2290 return error; 2291 } 2292 } while (readsize != 1 && readsize > st->blksize); 2293 2294 free(bf, M_TEMP); 2295 return 0; 2296 } 2297 2298 static int 2299 stdump(dev_t dev, daddr_t blkno, void *va, size_t size) 2300 { 2301 /* Not implemented. */ 2302 return ENXIO; 2303 } 2304 2305 /* 2306 * Send a filled out parameter structure to the drive to 2307 * set it into the desire modes etc. 2308 */ 2309 int 2310 st_mode_select(struct st_softc *st, int flags) 2311 { 2312 u_int select_len; 2313 struct select { 2314 struct scsi_mode_parameter_header_6 header; 2315 struct scsi_general_block_descriptor blk_desc; 2316 u_char sense_data[MAX_PAGE_0_SIZE]; 2317 } select; 2318 struct scsipi_periph *periph = st->sc_periph; 2319 2320 select_len = sizeof(select.header) + sizeof(select.blk_desc) + 2321 st->page_0_size; 2322 2323 /* 2324 * This quirk deals with drives that have only one valid mode 2325 * and think this gives them license to reject all mode selects, 2326 * even if the selected mode is the one that is supported. 2327 */ 2328 if (st->quirks & ST_Q_UNIMODAL) { 2329 SC_DEBUG(periph, SCSIPI_DB3, 2330 ("not setting density 0x%x blksize 0x%x\n", 2331 st->density, st->blksize)); 2332 return 0; 2333 } 2334 2335 /* Set up for a mode select */ 2336 memset(&select, 0, sizeof(select)); 2337 select.header.blk_desc_len = sizeof(struct 2338 scsi_general_block_descriptor); 2339 select.header.dev_spec &= ~SMH_DSP_BUFF_MODE; 2340 select.blk_desc.density = st->density; 2341 if (st->flags & ST_DONTBUFFER) 2342 select.header.dev_spec |= SMH_DSP_BUFF_MODE_OFF; 2343 else 2344 select.header.dev_spec |= SMH_DSP_BUFF_MODE_ON; 2345 if (st->flags & ST_FIXEDBLOCKS) 2346 _lto3b(st->blksize, select.blk_desc.blklen); 2347 if (st->page_0_size) 2348 memcpy(select.sense_data, st->sense_data, st->page_0_size); 2349 2350 /* do the command */ 2351 return scsipi_mode_select(periph, 0, &select.header, select_len, 2352 flags, ST_RETRIES, ST_CTL_TIME); 2353 } 2354
Indexes created Tue Sep 23 02:09:52 GMT 2025