st.c revision 1.217.12.3
1 /* $NetBSD: st.c,v 1.217.12.3 2012/03/06 09:56:21 mrg 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 1.217.12.3 2012/03/06 09:56:21 mrg Exp $"); 54 55 #include "opt_scsi.h" 56 57 #include <sys/param.h> 58 #include <sys/systm.h> 59 #include <sys/fcntl.h> 60 #include <sys/errno.h> 61 #include <sys/ioctl.h> 62 #include <sys/malloc.h> 63 #include <sys/buf.h> 64 #include <sys/bufq.h> 65 #include <sys/proc.h> 66 #include <sys/mtio.h> 67 #include <sys/device.h> 68 #include <sys/conf.h> 69 #include <sys/kernel.h> 70 #include <sys/vnode.h> 71 #include <sys/iostat.h> 72 #include <sys/sysctl.h> 73 74 #include <dev/scsipi/scsi_spc.h> 75 #include <dev/scsipi/scsipi_all.h> 76 #include <dev/scsipi/scsi_all.h> 77 #include <dev/scsipi/scsi_tape.h> 78 #include <dev/scsipi/scsipiconf.h> 79 #include <dev/scsipi/scsipi_base.h> 80 #include <dev/scsipi/stvar.h> 81 82 /* Defines for device specific stuff */ 83 #define DEF_FIXED_BSIZE 512 84 85 #define STMODE(z) ( minor(z) & 0x03) 86 #define STDSTY(z) ((minor(z) >> 2) & 0x03) 87 #define STUNIT(z) ((minor(z) >> 4) ) 88 #define STNMINOR 16 89 90 #define NORMAL_MODE 0 91 #define NOREW_MODE 1 92 #define EJECT_MODE 2 93 #define CTRL_MODE 3 94 95 #ifndef ST_MOUNT_DELAY 96 #define ST_MOUNT_DELAY 0 97 #endif 98 99 static dev_type_open(stopen); 100 static dev_type_close(stclose); 101 static dev_type_read(stread); 102 static dev_type_write(stwrite); 103 static dev_type_ioctl(stioctl); 104 static dev_type_strategy(ststrategy); 105 static dev_type_dump(stdump); 106 107 const struct bdevsw st_bdevsw = { 108 stopen, stclose, ststrategy, stioctl, stdump, nosize, D_TAPE 109 }; 110 111 const struct cdevsw st_cdevsw = { 112 stopen, stclose, stread, stwrite, stioctl, 113 nostop, notty, nopoll, nommap, nokqfilter, D_TAPE 114 }; 115 116 /* 117 * Define various devices that we know mis-behave in some way, 118 * and note how they are bad, so we can correct for them 119 */ 120 121 static const struct st_quirk_inquiry_pattern st_quirk_patterns[] = { 122 {{T_SEQUENTIAL, T_REMOV, 123 " ", " ", " "}, {0, 0, { 124 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 125 {ST_Q_FORCE_BLKSIZE, 512, QIC_24}, /* minor 4-7 */ 126 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_1600}, /* minor 8-11 */ 127 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_6250} /* minor 12-15 */ 128 }}}, 129 {{T_SEQUENTIAL, T_REMOV, 130 "TANDBERG", " TDC 3600 ", ""}, {0, 12, { 131 {0, 0, 0}, /* minor 0-3 */ 132 {ST_Q_FORCE_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 133 {0, 0, QIC_150}, /* minor 8-11 */ 134 {0, 0, QIC_120} /* minor 12-15 */ 135 }}}, 136 {{T_SEQUENTIAL, T_REMOV, 137 "TANDBERG", " TDC 3800 ", ""}, {0, 0, { 138 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 139 {0, 0, QIC_525}, /* minor 4-7 */ 140 {0, 0, QIC_150}, /* minor 8-11 */ 141 {0, 0, QIC_120} /* minor 12-15 */ 142 }}}, 143 {{T_SEQUENTIAL, T_REMOV, 144 "TANDBERG", " SLR5 4/8GB ", ""}, {0, 0, { 145 {ST_Q_FORCE_BLKSIZE, 1024, 0}, /* minor 0-3 */ 146 {0, 0, 0}, /* minor 4-7 */ 147 {0, 0, 0}, /* minor 8-11 */ 148 {0, 0, 0} /* minor 12-15 */ 149 }}}, 150 /* 151 * lacking a manual for the 4200, it's not clear what the 152 * specific density codes should be- the device is a 2.5GB 153 * capable QIC drive, those density codes aren't readily 154 * availabel. The 'default' will just have to do. 155 */ 156 {{T_SEQUENTIAL, T_REMOV, 157 "TANDBERG", " TDC 4200 ", ""}, {0, 0, { 158 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 159 {0, 0, QIC_525}, /* minor 4-7 */ 160 {0, 0, QIC_150}, /* minor 8-11 */ 161 {0, 0, QIC_120} /* minor 12-15 */ 162 }}}, 163 /* 164 * At least -005 and -007 need this. I'll assume they all do unless I 165 * hear otherwise. - mycroft, 31MAR1994 166 */ 167 {{T_SEQUENTIAL, T_REMOV, 168 "ARCHIVE ", "VIPER 2525 25462", ""}, {0, 0, { 169 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 170 {ST_Q_SENSE_HELP, 0, QIC_525}, /* minor 4-7 */ 171 {0, 0, QIC_150}, /* minor 8-11 */ 172 {0, 0, QIC_120} /* minor 12-15 */ 173 }}}, 174 /* 175 * One user reports that this works for his tape drive. It probably 176 * needs more work. - mycroft, 09APR1994 177 */ 178 {{T_SEQUENTIAL, T_REMOV, 179 "SANKYO ", "CP525 ", ""}, {0, 0, { 180 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 181 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 182 {0, 0, QIC_150}, /* minor 8-11 */ 183 {0, 0, QIC_120} /* minor 12-15 */ 184 }}}, 185 {{T_SEQUENTIAL, T_REMOV, 186 "ANRITSU ", "DMT780 ", ""}, {0, 0, { 187 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 188 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 189 {0, 0, QIC_150}, /* minor 8-11 */ 190 {0, 0, QIC_120} /* minor 12-15 */ 191 }}}, 192 {{T_SEQUENTIAL, T_REMOV, 193 "ARCHIVE ", "VIPER 150 21247", ""}, {ST_Q_ERASE_NOIMM, 12, { 194 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 195 {0, 0, QIC_150}, /* minor 4-7 */ 196 {0, 0, QIC_120}, /* minor 8-11 */ 197 {0, 0, QIC_24} /* minor 12-15 */ 198 }}}, 199 {{T_SEQUENTIAL, T_REMOV, 200 "ARCHIVE ", "VIPER 150 21531", ""}, {ST_Q_ERASE_NOIMM, 12, { 201 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 202 {0, 0, QIC_150}, /* minor 4-7 */ 203 {0, 0, QIC_120}, /* minor 8-11 */ 204 {0, 0, QIC_24} /* minor 12-15 */ 205 }}}, 206 {{T_SEQUENTIAL, T_REMOV, 207 "WANGTEK ", "5099ES SCSI", ""}, {0, 0, { 208 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 209 {0, 0, QIC_11}, /* minor 4-7 */ 210 {0, 0, QIC_24}, /* minor 8-11 */ 211 {0, 0, QIC_24} /* minor 12-15 */ 212 }}}, 213 {{T_SEQUENTIAL, T_REMOV, 214 "WANGTEK ", "5150ES SCSI", ""}, {0, 0, { 215 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 216 {0, 0, QIC_24}, /* minor 4-7 */ 217 {0, 0, QIC_120}, /* minor 8-11 */ 218 {0, 0, QIC_150} /* minor 12-15 */ 219 }}}, 220 {{T_SEQUENTIAL, T_REMOV, 221 "WANGTEK ", "5525ES SCSI REV7", ""}, {0, 0, { 222 {0, 0, 0}, /* minor 0-3 */ 223 {ST_Q_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 224 {0, 0, QIC_150}, /* minor 8-11 */ 225 {0, 0, QIC_120} /* minor 12-15 */ 226 }}}, 227 {{T_SEQUENTIAL, T_REMOV, 228 "WangDAT ", "Model 1300 ", ""}, {0, 0, { 229 {0, 0, 0}, /* minor 0-3 */ 230 {ST_Q_FORCE_BLKSIZE, 512, DDS}, /* minor 4-7 */ 231 {ST_Q_FORCE_BLKSIZE, 1024, DDS}, /* minor 8-11 */ 232 {ST_Q_FORCE_BLKSIZE, 0, DDS} /* minor 12-15 */ 233 }}}, 234 {{T_SEQUENTIAL, T_REMOV, 235 "EXABYTE ", "EXB-8200 ", "263H"}, {0, 5, { 236 {0, 0, 0}, /* minor 0-3 */ 237 {0, 0, 0}, /* minor 4-7 */ 238 {0, 0, 0}, /* minor 8-11 */ 239 {0, 0, 0} /* minor 12-15 */ 240 }}}, 241 {{T_SEQUENTIAL, T_REMOV, 242 "STK", "9490", ""}, 243 {ST_Q_FORCE_BLKSIZE, 0, { 244 {0, 0, 0}, /* minor 0-3 */ 245 {0, 0, 0}, /* minor 4-7 */ 246 {0, 0, 0}, /* minor 8-11 */ 247 {0, 0, 0} /* minor 12-15 */ 248 }}}, 249 {{T_SEQUENTIAL, T_REMOV, 250 "STK", "SD-3", ""}, 251 {ST_Q_FORCE_BLKSIZE, 0, { 252 {0, 0, 0}, /* minor 0-3 */ 253 {0, 0, 0}, /* minor 4-7 */ 254 {0, 0, 0}, /* minor 8-11 */ 255 {0, 0, 0} /* minor 12-15 */ 256 }}}, 257 {{T_SEQUENTIAL, T_REMOV, 258 "IBM", "03590", ""}, {ST_Q_IGNORE_LOADS, 0, { 259 {0, 0, 0}, /* minor 0-3 */ 260 {0, 0, 0}, /* minor 4-7 */ 261 {0, 0, 0}, /* minor 8-11 */ 262 {0, 0, 0} /* minor 12-15 */ 263 }}}, 264 {{T_SEQUENTIAL, T_REMOV, 265 "HP ", "T4000s ", ""}, {ST_Q_UNIMODAL, 0, { 266 {0, 0, QIC_3095}, /* minor 0-3 */ 267 {0, 0, QIC_3095}, /* minor 4-7 */ 268 {0, 0, QIC_3095}, /* minor 8-11 */ 269 {0, 0, QIC_3095}, /* minor 12-15 */ 270 }}}, 271 #if 0 272 {{T_SEQUENTIAL, T_REMOV, 273 "EXABYTE ", "EXB-8200 ", ""}, {0, 12, { 274 {0, 0, 0}, /* minor 0-3 */ 275 {0, 0, 0}, /* minor 4-7 */ 276 {0, 0, 0}, /* minor 8-11 */ 277 {0, 0, 0} /* minor 12-15 */ 278 }}}, 279 #endif 280 {{T_SEQUENTIAL, T_REMOV, 281 "TEAC ", "MT-2ST/N50 ", ""}, {ST_Q_IGNORE_LOADS, 0, { 282 {0, 0, 0}, /* minor 0-3 */ 283 {0, 0, 0}, /* minor 4-7 */ 284 {0, 0, 0}, /* minor 8-11 */ 285 {0, 0, 0} /* minor 12-15 */ 286 }}}, 287 {{T_SEQUENTIAL, T_REMOV, 288 "OnStream", "ADR50 Drive", ""}, {ST_Q_UNIMODAL, 0, { 289 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 290 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 4-7 */ 291 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 8-11 */ 292 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 12-15 */ 293 }}}, 294 {{T_SEQUENTIAL, T_REMOV, 295 "OnStream DI-30", "", "1.0"}, {ST_Q_NOFILEMARKS, 0, { 296 {0, 0, 0}, /* minor 0-3 */ 297 {0, 0, 0}, /* minor 4-7 */ 298 {0, 0, 0}, /* minor 8-11 */ 299 {0, 0, 0} /* minor 12-15 */ 300 }}}, 301 {{T_SEQUENTIAL, T_REMOV, 302 "NCR H621", "0-STD-03-46F880 ", ""}, {ST_Q_NOPREVENT, 0, { 303 {0, 0, 0}, /* minor 0-3 */ 304 {0, 0, 0}, /* minor 4-7 */ 305 {0, 0, 0}, /* minor 8-11 */ 306 {0, 0, 0} /* minor 12-15 */ 307 }}}, 308 {{T_SEQUENTIAL, T_REMOV, 309 "Seagate STT3401A", "hp0atxa", ""}, {0, 0, { 310 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 311 {ST_Q_FORCE_BLKSIZE, 1024, 0}, /* minor 4-7 */ 312 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 8-11 */ 313 {ST_Q_FORCE_BLKSIZE, 512, 0} /* minor 12-15 */ 314 }}}, 315 }; 316 317 #define NOEJECT 0 318 #define EJECT 1 319 320 static void st_identify_drive(struct st_softc *, 321 struct scsipi_inquiry_pattern *); 322 static void st_loadquirks(struct st_softc *); 323 static int st_mount_tape(dev_t, int); 324 static void st_unmount(struct st_softc *, boolean); 325 static int st_decide_mode(struct st_softc *, boolean); 326 static void ststart(struct scsipi_periph *); 327 static void strestart(void *); 328 static void stdone(struct scsipi_xfer *, int); 329 static int st_read(struct st_softc *, char *, int, int); 330 static int st_space(struct st_softc *, int, u_int, int); 331 static int st_write_filemarks(struct st_softc *, int, int); 332 static int st_check_eod(struct st_softc *, boolean, int *, int); 333 static int st_load(struct st_softc *, u_int, int); 334 static int st_rewind(struct st_softc *, u_int, int); 335 static int st_interpret_sense(struct scsipi_xfer *); 336 static int st_touch_tape(struct st_softc *); 337 static int st_erase(struct st_softc *, int full, int flags); 338 static int st_rdpos(struct st_softc *, int, u_int32_t *); 339 static int st_setpos(struct st_softc *, int, u_int32_t *); 340 341 static const struct scsipi_periphsw st_switch = { 342 st_interpret_sense, 343 ststart, 344 NULL, 345 stdone 346 }; 347 348 #if defined(ST_ENABLE_EARLYWARN) 349 #define ST_INIT_FLAGS ST_EARLYWARN 350 #else 351 #define ST_INIT_FLAGS 0 352 #endif 353 354 /* 355 * The routine called by the low level scsi routine when it discovers 356 * A device suitable for this driver 357 */ 358 void 359 stattach(device_t parent, struct st_softc *st, void *aux) 360 { 361 struct scsipibus_attach_args *sa = aux; 362 struct scsipi_periph *periph = sa->sa_periph; 363 364 SC_DEBUG(periph, SCSIPI_DB2, ("stattach: ")); 365 366 /* 367 * Store information needed to contact our base driver 368 */ 369 st->sc_periph = periph; 370 periph->periph_dev = &st->sc_dev; 371 periph->periph_switch = &st_switch; 372 373 /* 374 * Set initial flags 375 */ 376 377 st->flags = ST_INIT_FLAGS; 378 379 /* 380 * Set up the buf queue for this device 381 */ 382 bufq_alloc(&st->buf_queue, "fcfs", 0); 383 384 callout_init(&st->sc_callout, 0); 385 386 /* 387 * Check if the drive is a known criminal and take 388 * Any steps needed to bring it into line 389 */ 390 st_identify_drive(st, &sa->sa_inqbuf); 391 /* 392 * Use the subdriver to request information regarding the drive. 393 */ 394 printf("\n"); 395 printf("%s: %s", device_xname(&st->sc_dev), st->quirkdata ? "quirks apply, " : ""); 396 if (scsipi_test_unit_ready(periph, 397 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE) || 398 st->ops(st, ST_OPS_MODESENSE, 399 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE)) 400 printf("drive empty\n"); 401 else { 402 printf("density code %d, ", st->media_density); 403 if (st->media_blksize > 0) 404 printf("%d-byte", st->media_blksize); 405 else 406 printf("variable"); 407 printf(" blocks, write-%s\n", 408 (st->flags & ST_READONLY) ? "protected" : "enabled"); 409 } 410 411 st->stats = iostat_alloc(IOSTAT_TAPE, parent, device_xname(&st->sc_dev)); 412 413 rnd_attach_source(&st->rnd_source, device_xname(&st->sc_dev), 414 RND_TYPE_TAPE, 0); 415 } 416 417 int 418 stdetach(device_t self, int flags) 419 { 420 struct st_softc *st = device_private(self); 421 int s, bmaj, cmaj, mn; 422 423 /* locate the major number */ 424 bmaj = bdevsw_lookup_major(&st_bdevsw); 425 cmaj = cdevsw_lookup_major(&st_cdevsw); 426 427 /* kill any pending restart */ 428 callout_stop(&st->sc_callout); 429 430 s = splbio(); 431 432 /* Kill off any queued buffers. */ 433 bufq_drain(st->buf_queue); 434 435 bufq_free(st->buf_queue); 436 437 /* Kill off any pending commands. */ 438 scsipi_kill_pending(st->sc_periph); 439 440 splx(s); 441 442 /* Nuke the vnodes for any open instances */ 443 mn = STUNIT(device_unit(self)); 444 vdevgone(bmaj, mn, mn+STNMINOR-1, VBLK); 445 vdevgone(cmaj, mn, mn+STNMINOR-1, VCHR); 446 447 iostat_free(st->stats); 448 449 /* Unhook the entropy source. */ 450 rnd_detach_source(&st->rnd_source); 451 452 return (0); 453 } 454 455 /* 456 * Use the inquiry routine in 'scsi_base' to get drive info so we can 457 * Further tailor our behaviour. 458 */ 459 static void 460 st_identify_drive(struct st_softc *st, struct scsipi_inquiry_pattern *inqbuf) 461 { 462 const struct st_quirk_inquiry_pattern *finger; 463 int priority; 464 465 finger = scsipi_inqmatch(inqbuf, 466 st_quirk_patterns, 467 sizeof(st_quirk_patterns) / sizeof(st_quirk_patterns[0]), 468 sizeof(st_quirk_patterns[0]), &priority); 469 if (priority != 0) { 470 st->quirkdata = &finger->quirkdata; 471 st->drive_quirks = finger->quirkdata.quirks; 472 st->quirks = finger->quirkdata.quirks; /* start value */ 473 st->page_0_size = finger->quirkdata.page_0_size; 474 KASSERT(st->page_0_size <= MAX_PAGE_0_SIZE); 475 st_loadquirks(st); 476 } 477 } 478 479 /* 480 * initialise the subdevices to the default (QUIRK) state. 481 * this will remove any setting made by the system operator or previous 482 * operations. 483 */ 484 static void 485 st_loadquirks(struct st_softc *st) 486 { 487 int i; 488 const struct modes *mode; 489 struct modes *mode2; 490 491 mode = st->quirkdata->modes; 492 mode2 = st->modes; 493 for (i = 0; i < 4; i++) { 494 memset(mode2, 0, sizeof(struct modes)); 495 st->modeflags[i] &= ~(BLKSIZE_SET_BY_QUIRK | 496 DENSITY_SET_BY_QUIRK | BLKSIZE_SET_BY_USER | 497 DENSITY_SET_BY_USER); 498 if ((mode->quirks | st->drive_quirks) & ST_Q_FORCE_BLKSIZE) { 499 mode2->blksize = mode->blksize; 500 st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; 501 } 502 if (mode->density) { 503 mode2->density = mode->density; 504 st->modeflags[i] |= DENSITY_SET_BY_QUIRK; 505 } 506 mode2->quirks |= mode->quirks; 507 mode++; 508 mode2++; 509 } 510 } 511 512 /* 513 * open the device. 514 */ 515 static int 516 stopen(dev_t dev, int flags, int mode, struct lwp *l) 517 { 518 u_int stmode, dsty; 519 int error, sflags, unit, tries, ntries; 520 struct st_softc *st; 521 struct scsipi_periph *periph; 522 struct scsipi_adapter *adapt; 523 524 unit = STUNIT(dev); 525 st = device_lookup_private(&st_cd, unit); 526 if (st == NULL) 527 return (ENXIO); 528 529 stmode = STMODE(dev); 530 dsty = STDSTY(dev); 531 532 periph = st->sc_periph; 533 adapt = periph->periph_channel->chan_adapter; 534 535 SC_DEBUG(periph, SCSIPI_DB1, ("open: dev=0x%"PRIx64" (unit %d (of %d))\n", dev, 536 unit, st_cd.cd_ndevs)); 537 538 539 /* 540 * Only allow one at a time 541 */ 542 if (periph->periph_flags & PERIPH_OPEN) { 543 aprint_error_dev(&st->sc_dev, "already open\n"); 544 return (EBUSY); 545 } 546 547 if ((error = scsipi_adapter_addref(adapt)) != 0) 548 return (error); 549 550 /* 551 * clear any latched errors. 552 */ 553 st->mt_resid = 0; 554 st->mt_erreg = 0; 555 st->asc = 0; 556 st->ascq = 0; 557 558 /* 559 * Catch any unit attention errors. Be silent about this 560 * unless we're already mounted. We ignore media change 561 * if we're in control mode or not mounted yet. 562 */ 563 if ((st->flags & ST_MOUNTED) == 0 || stmode == CTRL_MODE) { 564 #ifdef SCSIDEBUG 565 sflags = XS_CTL_IGNORE_MEDIA_CHANGE; 566 #else 567 sflags = XS_CTL_SILENT|XS_CTL_IGNORE_MEDIA_CHANGE; 568 #endif 569 } else 570 sflags = 0; 571 572 /* 573 * If we're already mounted or we aren't configured for 574 * a mount delay, only try a test unit ready once. Otherwise, 575 * try up to ST_MOUNT_DELAY times with a rest interval of 576 * one second between each try. 577 */ 578 579 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0) { 580 ntries = 1; 581 } else { 582 ntries = ST_MOUNT_DELAY; 583 } 584 585 for (error = tries = 0; tries < ntries; tries++) { 586 int slpintr, oflags; 587 588 /* 589 * If we had no error, or we're opening the control mode 590 * device, we jump out right away. 591 */ 592 593 error = scsipi_test_unit_ready(periph, sflags); 594 if (error == 0 || stmode == CTRL_MODE) { 595 break; 596 } 597 598 /* 599 * We had an error. 600 * 601 * If we're already mounted or we aren't configured for 602 * a mount delay, or the error isn't a NOT READY error, 603 * skip to the error exit now. 604 */ 605 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0 || 606 (st->mt_key != SKEY_NOT_READY)) { 607 goto bad; 608 } 609 610 /* 611 * clear any latched errors. 612 */ 613 st->mt_resid = 0; 614 st->mt_erreg = 0; 615 st->asc = 0; 616 st->ascq = 0; 617 618 /* 619 * Fake that we have the device open so 620 * we block other apps from getting in. 621 */ 622 623 oflags = periph->periph_flags; 624 periph->periph_flags |= PERIPH_OPEN; 625 626 slpintr = kpause("stload", true, hz, NULL); 627 628 periph->periph_flags = oflags; /* restore flags */ 629 if (slpintr != 0 && slpintr != EWOULDBLOCK) { 630 goto bad; 631 } 632 } 633 634 635 /* 636 * If the mode is 3 (e.g. minor = 3,7,11,15) then the device has 637 * been opened to set defaults and perform other, usually non-I/O 638 * related, operations. In this case, do a quick check to see 639 * whether the unit actually had a tape loaded (this will be known 640 * as to whether or not we got a NOT READY for the above 641 * unit attention). If a tape is there, go do a mount sequence. 642 */ 643 if (stmode == CTRL_MODE && st->mt_key == SKEY_NOT_READY) { 644 periph->periph_flags |= PERIPH_OPEN; 645 return (0); 646 } 647 648 /* 649 * If we get this far and had an error set, that means we failed 650 * to pass the 'test unit ready' test for the non-controlmode device, 651 * so we bounce the open. 652 */ 653 654 if (error) 655 return (error); 656 657 /* 658 * Else, we're now committed to saying we're open. 659 */ 660 661 periph->periph_flags |= PERIPH_OPEN; /* unit attn are now errors */ 662 663 /* 664 * If it's a different mode, or if the media has been 665 * invalidated, unmount the tape from the previous 666 * session but continue with open processing 667 */ 668 if (st->last_dsty != dsty || 669 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 670 st_unmount(st, NOEJECT); 671 672 /* 673 * If we are not mounted, then we should start a new 674 * mount session. 675 */ 676 if (!(st->flags & ST_MOUNTED)) { 677 if ((error = st_mount_tape(dev, flags)) != 0) 678 goto bad; 679 st->last_dsty = dsty; 680 } 681 if (!(st->quirks & ST_Q_NOPREVENT)) { 682 scsipi_prevent(periph, SPAMR_PREVENT_DT, 683 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 684 } 685 686 SC_DEBUG(periph, SCSIPI_DB2, ("open complete\n")); 687 return (0); 688 689 bad: 690 st_unmount(st, NOEJECT); 691 scsipi_adapter_delref(adapt); 692 periph->periph_flags &= ~PERIPH_OPEN; 693 return (error); 694 } 695 696 /* 697 * close the device.. only called if we are the LAST 698 * occurence of an open device 699 */ 700 static int 701 stclose(dev_t dev, int flags, int mode, struct lwp *l) 702 { 703 int stxx, error = 0; 704 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(dev)); 705 struct scsipi_periph *periph = st->sc_periph; 706 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 707 708 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("closing\n")); 709 710 /* 711 * Make sure that a tape opened in write-only mode will have 712 * file marks written on it when closed, even if not written to. 713 * 714 * This is for SUN compatibility. Actually, the Sun way of 715 * things is to: 716 * 717 * only write filemarks if there are fmks to be written and 718 * - open for write (possibly read/write) 719 * - the last operation was a write 720 * or: 721 * - opened for wronly 722 * - no data was written (including filemarks) 723 */ 724 725 stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); 726 if (((flags & FWRITE) && stxx == ST_WRITTEN) || 727 ((flags & O_ACCMODE) == FWRITE && stxx == 0)) { 728 int nm; 729 error = st_check_eod(st, FALSE, &nm, 0); 730 } 731 732 /* 733 * Allow robots to eject tape if needed. 734 */ 735 scsipi_prevent(periph, SPAMR_ALLOW, 736 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 737 738 switch (STMODE(dev)) { 739 case NORMAL_MODE: 740 st_unmount(st, NOEJECT); 741 break; 742 case NOREW_MODE: 743 case CTRL_MODE: 744 /* 745 * Leave mounted unless media seems to have been removed. 746 * 747 * Otherwise, if we're to terminate a tape with more than one 748 * filemark [ and because we're not rewinding here ], backspace 749 * one filemark so that later appends will see an unbroken 750 * sequence of: 751 * 752 * file - FMK - file - FMK ... file - FMK FMK (EOM) 753 */ 754 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 755 st_unmount(st, NOEJECT); 756 } else if (error == 0) { 757 /* 758 * ST_WRITTEN was preserved from above. 759 * 760 * All we need to know here is: 761 * 762 * Were we writing this tape and was the last 763 * operation a write? 764 * 765 * Are there supposed to be 2FM at EOD? 766 * 767 * If both statements are true, then we backspace 768 * one filemark. 769 */ 770 stxx |= (st->flags & ST_2FM_AT_EOD); 771 if ((flags & FWRITE) != 0 && 772 (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { 773 error = st_space(st, -1, SP_FILEMARKS, 0); 774 } 775 } 776 break; 777 case EJECT_MODE: 778 st_unmount(st, EJECT); 779 break; 780 } 781 782 scsipi_wait_drain(periph); 783 784 scsipi_adapter_delref(adapt); 785 periph->periph_flags &= ~PERIPH_OPEN; 786 787 return (error); 788 } 789 790 /* 791 * Start a new mount session. 792 * Copy in all the default parameters from the selected device mode. 793 * and try guess any that seem to be defaulted. 794 */ 795 static int 796 st_mount_tape(dev_t dev, int flags) 797 { 798 int unit; 799 u_int dsty; 800 struct st_softc *st; 801 struct scsipi_periph *periph; 802 int error = 0; 803 804 unit = STUNIT(dev); 805 dsty = STDSTY(dev); 806 st = device_lookup_private(&st_cd, unit); 807 periph = st->sc_periph; 808 809 if (st->flags & ST_MOUNTED) 810 return (0); 811 812 SC_DEBUG(periph, SCSIPI_DB1, ("mounting\n ")); 813 st->flags |= ST_NEW_MOUNT; 814 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 815 /* 816 * If the media is new, then make sure we give it a chance to 817 * to do a 'load' instruction. (We assume it is new.) 818 */ 819 if ((error = st_load(st, LD_LOAD, XS_CTL_SILENT)) != 0) 820 return (error); 821 /* 822 * Throw another dummy instruction to catch 823 * 'Unit attention' errors. Many drives give 824 * these after doing a Load instruction (with 825 * the MEDIUM MAY HAVE CHANGED asc/ascq). 826 */ 827 scsipi_test_unit_ready(periph, XS_CTL_SILENT); /* XXX */ 828 829 /* 830 * Some devices can't tell you much until they have been 831 * asked to look at the media. This quirk does this. 832 */ 833 if (st->quirks & ST_Q_SENSE_HELP) 834 if ((error = st_touch_tape(st)) != 0) 835 return (error); 836 /* 837 * Load the physical device parameters 838 * loads: blkmin, blkmax 839 */ 840 if ((error = st->ops(st, ST_OPS_RBL, 0)) != 0) 841 return (error); 842 /* 843 * Load the media dependent parameters 844 * includes: media_blksize,media_density,numblks 845 * As we have a tape in, it should be reflected here. 846 * If not you may need the "quirk" above. 847 */ 848 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 849 return (error); 850 /* 851 * If we have gained a permanent density from somewhere, 852 * then use it in preference to the one supplied by 853 * default by the driver. 854 */ 855 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 856 st->density = st->modes[dsty].density; 857 else 858 st->density = st->media_density; 859 /* 860 * If we have gained a permanent blocksize 861 * then use it in preference to the one supplied by 862 * default by the driver. 863 */ 864 st->flags &= ~ST_FIXEDBLOCKS; 865 if (st->modeflags[dsty] & 866 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 867 st->blksize = st->modes[dsty].blksize; 868 if (st->blksize) 869 st->flags |= ST_FIXEDBLOCKS; 870 } else { 871 if ((error = st_decide_mode(st, FALSE)) != 0) 872 return (error); 873 } 874 if ((error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 875 /* ATAPI will return ENODEV for this, and this may be OK */ 876 if (error != ENODEV) { 877 aprint_error_dev(&st->sc_dev, "cannot set selected mode\n"); 878 return (error); 879 } 880 } 881 st->flags &= ~ST_NEW_MOUNT; 882 st->flags |= ST_MOUNTED; 883 periph->periph_flags |= PERIPH_MEDIA_LOADED; /* move earlier? */ 884 st->blkno = st->fileno = (daddr_t) 0; 885 return (0); 886 } 887 888 /* 889 * End the present mount session. 890 * Rewind, and optionally eject the tape. 891 * Reset various flags to indicate that all new 892 * operations require another mount operation 893 */ 894 static void 895 st_unmount(struct st_softc *st, boolean eject) 896 { 897 struct scsipi_periph *periph = st->sc_periph; 898 int nmarks; 899 900 if ((st->flags & ST_MOUNTED) == 0) 901 return; 902 SC_DEBUG(periph, SCSIPI_DB1, ("unmounting\n")); 903 st_check_eod(st, FALSE, &nmarks, XS_CTL_IGNORE_NOT_READY); 904 st_rewind(st, 0, XS_CTL_IGNORE_NOT_READY); 905 906 /* 907 * Section 9.3.3 of the SCSI specs states that a device shall return 908 * the density value specified in the last succesfull MODE SELECT 909 * after an unload operation, in case it is not able to 910 * automatically determine the density of the new medium. 911 * 912 * So we instruct the device to use the default density, which will 913 * prevent the use of stale density values (in particular, 914 * in st_touch_tape(). 915 */ 916 st->density = 0; 917 if (st->ops(st, ST_OPS_MODESELECT, 0) != 0) { 918 aprint_error_dev(&st->sc_dev, "WARNING: cannot revert to default density\n"); 919 } 920 921 if (eject) { 922 if (!(st->quirks & ST_Q_NOPREVENT)) { 923 scsipi_prevent(periph, SPAMR_ALLOW, 924 XS_CTL_IGNORE_ILLEGAL_REQUEST | 925 XS_CTL_IGNORE_NOT_READY); 926 } 927 st_load(st, LD_UNLOAD, XS_CTL_IGNORE_NOT_READY); 928 st->blkno = st->fileno = (daddr_t) -1; 929 } else { 930 st->blkno = st->fileno = (daddr_t) 0; 931 } 932 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 933 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 934 } 935 936 /* 937 * Given all we know about the device, media, mode, 'quirks' and 938 * initial operation, make a decision as to how we should be set 939 * to run (regarding blocking and EOD marks) 940 */ 941 int 942 st_decide_mode(struct st_softc *st, boolean first_read) 943 { 944 945 SC_DEBUG(st->sc_periph, SCSIPI_DB2, ("starting block mode decision\n")); 946 947 /* 948 * If the drive can only handle fixed-length blocks and only at 949 * one size, perhaps we should just do that. 950 */ 951 if (st->blkmin && (st->blkmin == st->blkmax)) { 952 st->flags |= ST_FIXEDBLOCKS; 953 st->blksize = st->blkmin; 954 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 955 ("blkmin == blkmax of %d\n", st->blkmin)); 956 goto done; 957 } 958 /* 959 * If the tape density mandates (or even suggests) use of fixed 960 * or variable-length blocks, comply. 961 */ 962 switch (st->density) { 963 case HALFINCH_800: 964 case HALFINCH_1600: 965 case HALFINCH_6250: 966 case DDS: 967 st->flags &= ~ST_FIXEDBLOCKS; 968 st->blksize = 0; 969 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 970 ("density specified variable\n")); 971 goto done; 972 case QIC_11: 973 case QIC_24: 974 case QIC_120: 975 case QIC_150: 976 case QIC_525: 977 case QIC_1320: 978 case QIC_3095: 979 case QIC_3220: 980 st->flags |= ST_FIXEDBLOCKS; 981 if (st->media_blksize > 0) 982 st->blksize = st->media_blksize; 983 else 984 st->blksize = DEF_FIXED_BSIZE; 985 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 986 ("density specified fixed\n")); 987 goto done; 988 } 989 /* 990 * If we're about to read the tape, perhaps we should choose 991 * fixed or variable-length blocks and block size according to 992 * what the drive found on the tape. 993 */ 994 if (first_read && 995 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 996 (st->media_blksize == DEF_FIXED_BSIZE) || 997 (st->media_blksize == 1024))) { 998 if (st->media_blksize > 0) 999 st->flags |= ST_FIXEDBLOCKS; 1000 else 1001 st->flags &= ~ST_FIXEDBLOCKS; 1002 st->blksize = st->media_blksize; 1003 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1004 ("Used media_blksize of %d\n", st->media_blksize)); 1005 goto done; 1006 } 1007 /* 1008 * We're getting no hints from any direction. Choose variable- 1009 * length blocks arbitrarily. 1010 */ 1011 st->flags &= ~ST_FIXEDBLOCKS; 1012 st->blksize = 0; 1013 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1014 ("Give up and default to variable mode\n")); 1015 1016 done: 1017 /* 1018 * Decide whether or not to write two file marks to signify end- 1019 * of-data. Make the decision as a function of density. If 1020 * the decision is not to use a second file mark, the SCSI BLANK 1021 * CHECK condition code will be recognized as end-of-data when 1022 * first read. 1023 * (I think this should be a by-product of fixed/variable..julian) 1024 */ 1025 switch (st->density) { 1026 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 1027 case QIC_11: 1028 case QIC_24: 1029 case QIC_120: 1030 case QIC_150: 1031 case QIC_525: 1032 case QIC_1320: 1033 case QIC_3095: 1034 case QIC_3220: 1035 st->flags &= ~ST_2FM_AT_EOD; 1036 break; 1037 default: 1038 st->flags |= ST_2FM_AT_EOD; 1039 } 1040 return (0); 1041 } 1042 1043 /* 1044 * Actually translate the requested transfer into 1045 * one the physical driver can understand 1046 * The transfer is described by a buf and will include 1047 * only one physical transfer. 1048 */ 1049 static void 1050 ststrategy(struct buf *bp) 1051 { 1052 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(bp->b_dev)); 1053 int s; 1054 1055 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1056 ("ststrategy %d bytes @ blk %" PRId64 "\n", bp->b_bcount, bp->b_blkno)); 1057 /* 1058 * If it's a null transfer, return immediately 1059 */ 1060 if (bp->b_bcount == 0) 1061 goto abort; 1062 1063 /* If offset is negative, error */ 1064 if (bp->b_blkno < 0) { 1065 bp->b_error = EINVAL; 1066 goto abort; 1067 } 1068 1069 /* 1070 * Odd sized request on fixed drives are verboten 1071 */ 1072 if (st->flags & ST_FIXEDBLOCKS) { 1073 if (bp->b_bcount % st->blksize) { 1074 aprint_error_dev(&st->sc_dev, "bad request, must be multiple of %d\n", 1075 st->blksize); 1076 bp->b_error = EIO; 1077 goto abort; 1078 } 1079 } 1080 /* 1081 * as are out-of-range requests on variable drives. 1082 */ 1083 else if (bp->b_bcount < st->blkmin || 1084 (st->blkmax && bp->b_bcount > st->blkmax)) { 1085 aprint_error_dev(&st->sc_dev, "bad request, must be between %d and %d\n", 1086 st->blkmin, st->blkmax); 1087 bp->b_error = EIO; 1088 goto abort; 1089 } 1090 s = splbio(); 1091 1092 /* 1093 * Place it in the queue of activities for this tape 1094 * at the end (a bit silly because we only have on user.. 1095 * (but it could fork())) 1096 */ 1097 bufq_put(st->buf_queue, bp); 1098 1099 /* 1100 * Tell the device to get going on the transfer if it's 1101 * not doing anything, otherwise just wait for completion 1102 * (All a bit silly if we're only allowing 1 open but..) 1103 */ 1104 ststart(st->sc_periph); 1105 1106 splx(s); 1107 return; 1108 abort: 1109 /* 1110 * Reset the residue because we didn't do anything, 1111 * and send the buffer back as done. 1112 */ 1113 bp->b_resid = bp->b_bcount; 1114 biodone(bp); 1115 return; 1116 } 1117 1118 /* 1119 * ststart looks to see if there is a buf waiting for the device 1120 * and that the device is not already busy. If both are true, 1121 * It dequeues the buf and creates a scsi command to perform the 1122 * transfer required. The transfer request will call scsipi_done 1123 * on completion, which will in turn call this routine again 1124 * so that the next queued transfer is performed. 1125 * The bufs are queued by the strategy routine (ststrategy) 1126 * 1127 * This routine is also called after other non-queued requests 1128 * have been made of the scsi driver, to ensure that the queue 1129 * continues to be drained. 1130 * ststart() is called at splbio 1131 */ 1132 static void 1133 ststart(struct scsipi_periph *periph) 1134 { 1135 struct st_softc *st = (void *)periph->periph_dev; 1136 struct buf *bp; 1137 struct scsi_rw_tape cmd; 1138 struct scsipi_xfer *xs; 1139 int flags, error; 1140 1141 SC_DEBUG(periph, SCSIPI_DB2, ("ststart ")); 1142 /* 1143 * See if there is a buf to do and we are not already 1144 * doing one 1145 */ 1146 while (periph->periph_active < periph->periph_openings) { 1147 /* if a special awaits, let it proceed first */ 1148 if (periph->periph_flags & PERIPH_WAITING) { 1149 periph->periph_flags &= ~PERIPH_WAITING; 1150 wakeup((void *)periph); 1151 return; 1152 } 1153 1154 /* 1155 * If the device has been unmounted by the user 1156 * then throw away all requests until done. 1157 */ 1158 if (__predict_false((st->flags & ST_MOUNTED) == 0 || 1159 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0)) { 1160 if ((bp = bufq_get(st->buf_queue)) != NULL) { 1161 /* make sure that one implies the other.. */ 1162 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 1163 bp->b_error = EIO; 1164 bp->b_resid = bp->b_bcount; 1165 biodone(bp); 1166 continue; 1167 } else { 1168 return; 1169 } 1170 } 1171 1172 if ((bp = bufq_peek(st->buf_queue)) == NULL) 1173 return; 1174 1175 iostat_busy(st->stats); 1176 1177 /* 1178 * only FIXEDBLOCK devices have pending I/O or space operations. 1179 */ 1180 if (st->flags & ST_FIXEDBLOCKS) { 1181 /* 1182 * If we are at a filemark but have not reported it yet 1183 * then we should report it now 1184 */ 1185 if (st->flags & ST_AT_FILEMARK) { 1186 if ((bp->b_flags & B_READ) == B_WRITE) { 1187 /* 1188 * Handling of ST_AT_FILEMARK in 1189 * st_space will fill in the right file 1190 * mark count. 1191 * Back up over filemark 1192 */ 1193 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1194 bufq_get(st->buf_queue); 1195 bp->b_error = EIO; 1196 bp->b_resid = bp->b_bcount; 1197 biodone(bp); 1198 continue; 1199 } 1200 } else { 1201 bufq_get(st->buf_queue); 1202 bp->b_resid = bp->b_bcount; 1203 bp->b_error = 0; 1204 st->flags &= ~ST_AT_FILEMARK; 1205 biodone(bp); 1206 continue; /* seek more work */ 1207 } 1208 } 1209 } 1210 /* 1211 * If we are at EOM but have not reported it 1212 * yet then we should report it now. 1213 */ 1214 if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { 1215 bufq_get(st->buf_queue); 1216 bp->b_resid = bp->b_bcount; 1217 if (st->flags & ST_EIO_PENDING) 1218 bp->b_error = EIO; 1219 st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); 1220 biodone(bp); 1221 continue; /* seek more work */ 1222 } 1223 1224 /* 1225 * Fill out the scsi command 1226 */ 1227 memset(&cmd, 0, sizeof(cmd)); 1228 flags = XS_CTL_NOSLEEP | XS_CTL_ASYNC; 1229 if ((bp->b_flags & B_READ) == B_WRITE) { 1230 cmd.opcode = WRITE; 1231 st->flags &= ~ST_FM_WRITTEN; 1232 flags |= XS_CTL_DATA_OUT; 1233 } else { 1234 cmd.opcode = READ; 1235 flags |= XS_CTL_DATA_IN; 1236 } 1237 1238 /* 1239 * Handle "fixed-block-mode" tape drives by using the 1240 * block count instead of the length. 1241 */ 1242 if (st->flags & ST_FIXEDBLOCKS) { 1243 cmd.byte2 |= SRW_FIXED; 1244 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1245 } else 1246 _lto3b(bp->b_bcount, cmd.len); 1247 1248 /* 1249 * Clear 'position updated' indicator 1250 */ 1251 st->flags &= ~ST_POSUPDATED; 1252 1253 /* 1254 * go ask the adapter to do all this for us 1255 */ 1256 xs = scsipi_make_xs(periph, 1257 (struct scsipi_generic *)&cmd, sizeof(cmd), 1258 (u_char *)bp->b_data, bp->b_bcount, 1259 0, ST_IO_TIME, bp, flags); 1260 if (__predict_false(xs == NULL)) { 1261 /* 1262 * out of memory. Keep this buffer in the queue, and 1263 * retry later. 1264 */ 1265 callout_reset(&st->sc_callout, hz / 2, strestart, 1266 periph); 1267 return; 1268 } 1269 /* 1270 * need to dequeue the buffer before queuing the command, 1271 * because cdstart may be called recursively from the 1272 * HBA driver 1273 */ 1274 #ifdef DIAGNOSTIC 1275 if (bufq_get(st->buf_queue) != bp) 1276 panic("ststart(): dequeued wrong buf"); 1277 #else 1278 bufq_get(st->buf_queue); 1279 #endif 1280 error = scsipi_execute_xs(xs); 1281 /* with a scsipi_xfer preallocated, scsipi_command can't fail */ 1282 KASSERT(error == 0); 1283 } /* go back and see if we can cram more work in.. */ 1284 } 1285 1286 static void 1287 strestart(void *v) 1288 { 1289 int s = splbio(); 1290 ststart((struct scsipi_periph *)v); 1291 splx(s); 1292 } 1293 1294 1295 static void 1296 stdone(struct scsipi_xfer *xs, int error) 1297 { 1298 struct st_softc *st = (void *)xs->xs_periph->periph_dev; 1299 struct buf *bp = xs->bp; 1300 1301 if (bp) { 1302 bp->b_error = error; 1303 bp->b_resid = xs->resid; 1304 /* 1305 * buggy device ? A SDLT320 can report an info 1306 * field of 0x3de8000 on a Media Error/Write Error 1307 * for this CBD: 0x0a 00 00 80 00 00 1308 */ 1309 if (bp->b_resid > bp->b_bcount || bp->b_resid < 0) 1310 bp->b_resid = bp->b_bcount; 1311 1312 if ((bp->b_flags & B_READ) == B_WRITE) 1313 st->flags |= ST_WRITTEN; 1314 else 1315 st->flags &= ~ST_WRITTEN; 1316 1317 iostat_unbusy(st->stats, bp->b_bcount, 1318 ((bp->b_flags & B_READ) == B_READ)); 1319 1320 rnd_add_uint32(&st->rnd_source, bp->b_blkno); 1321 1322 if ((st->flags & ST_POSUPDATED) == 0) { 1323 if (error) { 1324 st->fileno = st->blkno = -1; 1325 } else if (st->blkno != -1) { 1326 if (st->flags & ST_FIXEDBLOCKS) 1327 st->blkno += 1328 (bp->b_bcount / st->blksize); 1329 else 1330 st->blkno++; 1331 } 1332 } 1333 1334 biodone(bp); 1335 } 1336 } 1337 1338 static int 1339 stread(dev_t dev, struct uio *uio, int iomode) 1340 { 1341 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(dev)); 1342 1343 return (physio(ststrategy, NULL, dev, B_READ, 1344 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1345 } 1346 1347 static int 1348 stwrite(dev_t dev, struct uio *uio, int iomode) 1349 { 1350 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(dev)); 1351 1352 return (physio(ststrategy, NULL, dev, B_WRITE, 1353 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1354 } 1355 1356 /* 1357 * Perform special action on behalf of the user; 1358 * knows about the internals of this device 1359 */ 1360 static int 1361 stioctl(dev_t dev, u_long cmd, void *arg, int flag, struct lwp *l) 1362 { 1363 int error = 0; 1364 int unit; 1365 int number, nmarks, dsty; 1366 int flags; 1367 struct st_softc *st; 1368 int hold_blksize; 1369 u_int8_t hold_density; 1370 struct mtop *mt = (struct mtop *) arg; 1371 1372 /* 1373 * Find the device that the user is talking about 1374 */ 1375 flags = 0; /* give error messages, act on errors etc. */ 1376 unit = STUNIT(dev); 1377 dsty = STDSTY(dev); 1378 st = device_lookup_private(&st_cd, unit); 1379 hold_blksize = st->blksize; 1380 hold_density = st->density; 1381 1382 switch ((u_int) cmd) { 1383 1384 case MTIOCGET: { 1385 struct mtget *g = (struct mtget *) arg; 1386 /* 1387 * (to get the current state of READONLY) 1388 */ 1389 error = st->ops(st, ST_OPS_MODESENSE, XS_CTL_SILENT); 1390 if (error) { 1391 /* 1392 * Ignore the error if in control mode; 1393 * this is mandated by st(4). 1394 */ 1395 if (STMODE(dev) != CTRL_MODE) 1396 break; 1397 error = 0; 1398 } 1399 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("[ioctl: get status]\n")); 1400 memset(g, 0, sizeof(struct mtget)); 1401 g->mt_type = MT_ISAR; /* Ultrix compat *//*? */ 1402 g->mt_blksiz = st->blksize; 1403 g->mt_density = st->density; 1404 g->mt_mblksiz[0] = st->modes[0].blksize; 1405 g->mt_mblksiz[1] = st->modes[1].blksize; 1406 g->mt_mblksiz[2] = st->modes[2].blksize; 1407 g->mt_mblksiz[3] = st->modes[3].blksize; 1408 g->mt_mdensity[0] = st->modes[0].density; 1409 g->mt_mdensity[1] = st->modes[1].density; 1410 g->mt_mdensity[2] = st->modes[2].density; 1411 g->mt_mdensity[3] = st->modes[3].density; 1412 g->mt_fileno = st->fileno; 1413 g->mt_blkno = st->blkno; 1414 if (st->flags & ST_READONLY) 1415 g->mt_dsreg |= MT_DS_RDONLY; 1416 if (st->flags & ST_MOUNTED) 1417 g->mt_dsreg |= MT_DS_MOUNTED; 1418 g->mt_resid = st->mt_resid; 1419 g->mt_erreg = st->mt_erreg; 1420 /* 1421 * clear latched errors. 1422 */ 1423 st->mt_resid = 0; 1424 st->mt_erreg = 0; 1425 st->asc = 0; 1426 st->ascq = 0; 1427 break; 1428 } 1429 case MTIOCTOP: { 1430 1431 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1432 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1433 mt->mt_count)); 1434 1435 /* compat: in U*x it is a short */ 1436 number = mt->mt_count; 1437 switch ((short) (mt->mt_op)) { 1438 case MTWEOF: /* write an end-of-file record */ 1439 error = st_write_filemarks(st, number, flags); 1440 break; 1441 case MTBSF: /* backward space file */ 1442 number = -number; 1443 case MTFSF: /* forward space file */ 1444 error = st_check_eod(st, FALSE, &nmarks, flags); 1445 if (!error) 1446 error = st_space(st, number - nmarks, 1447 SP_FILEMARKS, flags); 1448 break; 1449 case MTBSR: /* backward space record */ 1450 number = -number; 1451 case MTFSR: /* forward space record */ 1452 error = st_check_eod(st, true, &nmarks, flags); 1453 if (!error) 1454 error = st_space(st, number, SP_BLKS, flags); 1455 break; 1456 case MTREW: /* rewind */ 1457 error = st_rewind(st, 0, flags); 1458 break; 1459 case MTOFFL: /* rewind and put the drive offline */ 1460 st_unmount(st, EJECT); 1461 break; 1462 case MTNOP: /* no operation, sets status only */ 1463 break; 1464 case MTRETEN: /* retension the tape */ 1465 error = st_load(st, LD_RETENSION, flags); 1466 if (!error) 1467 error = st_load(st, LD_LOAD, flags); 1468 break; 1469 case MTEOM: /* forward space to end of media */ 1470 error = st_check_eod(st, FALSE, &nmarks, flags); 1471 if (!error) 1472 error = st_space(st, 1, SP_EOM, flags); 1473 break; 1474 case MTCACHE: /* enable controller cache */ 1475 st->flags &= ~ST_DONTBUFFER; 1476 goto try_new_value; 1477 case MTNOCACHE: /* disable controller cache */ 1478 st->flags |= ST_DONTBUFFER; 1479 goto try_new_value; 1480 case MTERASE: /* erase volume */ 1481 error = st_erase(st, number, flags); 1482 break; 1483 case MTSETBSIZ: /* Set block size for device */ 1484 #ifdef NOTYET 1485 if (!(st->flags & ST_NEW_MOUNT)) { 1486 uprintf("re-mount tape before changing blocksize"); 1487 error = EINVAL; 1488 break; 1489 } 1490 #endif 1491 if (number == 0) 1492 st->flags &= ~ST_FIXEDBLOCKS; 1493 else { 1494 if ((st->blkmin || st->blkmax) && 1495 (number < st->blkmin || 1496 number > st->blkmax)) { 1497 error = EINVAL; 1498 break; 1499 } 1500 st->flags |= ST_FIXEDBLOCKS; 1501 } 1502 st->blksize = number; 1503 st->flags |= ST_BLOCK_SET; /*XXX */ 1504 goto try_new_value; 1505 1506 case MTSETDNSTY: /* Set density for device and mode */ 1507 /* 1508 * Any number >= 0 and <= 0xff is legal. Numbers 1509 * above 0x80 are 'vendor unique'. 1510 */ 1511 if (number < 0 || number > 255) { 1512 error = EINVAL; 1513 break; 1514 } else 1515 st->density = number; 1516 goto try_new_value; 1517 1518 case MTCMPRESS: 1519 error = st->ops(st, (number == 0) ? 1520 ST_OPS_CMPRSS_OFF : ST_OPS_CMPRSS_ON, 1521 XS_CTL_SILENT); 1522 break; 1523 1524 case MTEWARN: 1525 if (number) 1526 st->flags |= ST_EARLYWARN; 1527 else 1528 st->flags &= ~ST_EARLYWARN; 1529 break; 1530 1531 default: 1532 error = EINVAL; 1533 } 1534 break; 1535 } 1536 case MTIOCIEOT: 1537 case MTIOCEEOT: 1538 break; 1539 1540 case MTIOCRDSPOS: 1541 error = st_rdpos(st, 0, (u_int32_t *) arg); 1542 break; 1543 1544 case MTIOCRDHPOS: 1545 error = st_rdpos(st, 1, (u_int32_t *) arg); 1546 break; 1547 1548 case MTIOCSLOCATE: 1549 error = st_setpos(st, 0, (u_int32_t *) arg); 1550 break; 1551 1552 case MTIOCHLOCATE: 1553 error = st_setpos(st, 1, (u_int32_t *) arg); 1554 break; 1555 1556 1557 default: 1558 error = scsipi_do_ioctl(st->sc_periph, dev, cmd, arg, 1559 flag, l); 1560 break; 1561 } 1562 return (error); 1563 /*-----------------------------*/ 1564 try_new_value: 1565 /* 1566 * Check that the mode being asked for is aggreeable to the 1567 * drive. If not, put it back the way it was. 1568 * 1569 * If in control mode, we can make (persistent) mode changes 1570 * even if no medium is loaded (see st(4)). 1571 */ 1572 if ((STMODE(dev) != CTRL_MODE || (st->flags & ST_MOUNTED) != 0) && 1573 (error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 1574 /* put it back as it was */ 1575 aprint_error_dev(&st->sc_dev, "cannot set selected mode\n"); 1576 st->density = hold_density; 1577 st->blksize = hold_blksize; 1578 if (st->blksize) 1579 st->flags |= ST_FIXEDBLOCKS; 1580 else 1581 st->flags &= ~ST_FIXEDBLOCKS; 1582 return (error); 1583 } 1584 /* 1585 * As the drive liked it, if we are setting a new default, 1586 * set it into the structures as such. 1587 * 1588 * The means for deciding this are not finalised yet- but 1589 * if the device was opened in Control Mode, the values 1590 * are persistent now across mounts. 1591 */ 1592 if (STMODE(dev) == CTRL_MODE) { 1593 switch ((short) (mt->mt_op)) { 1594 case MTSETBSIZ: 1595 st->modes[dsty].blksize = st->blksize; 1596 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1597 break; 1598 case MTSETDNSTY: 1599 st->modes[dsty].density = st->density; 1600 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1601 break; 1602 } 1603 } 1604 return (0); 1605 } 1606 1607 /* 1608 * Do a synchronous read. 1609 */ 1610 static int 1611 st_read(struct st_softc *st, char *bf, int size, int flags) 1612 { 1613 struct scsi_rw_tape cmd; 1614 1615 /* 1616 * If it's a null transfer, return immediatly 1617 */ 1618 if (size == 0) 1619 return (0); 1620 memset(&cmd, 0, sizeof(cmd)); 1621 cmd.opcode = READ; 1622 if (st->flags & ST_FIXEDBLOCKS) { 1623 cmd.byte2 |= SRW_FIXED; 1624 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1625 cmd.len); 1626 } else 1627 _lto3b(size, cmd.len); 1628 return (scsipi_command(st->sc_periph, 1629 (void *)&cmd, sizeof(cmd), (void *)bf, size, 0, ST_IO_TIME, NULL, 1630 flags | XS_CTL_DATA_IN)); 1631 } 1632 1633 /* 1634 * issue an erase command 1635 */ 1636 static int 1637 st_erase(struct st_softc *st, int full, int flags) 1638 { 1639 int tmo; 1640 struct scsi_erase cmd; 1641 1642 /* 1643 * Full erase means set LONG bit in erase command, which asks 1644 * the drive to erase the entire unit. Without this bit, we're 1645 * asking the drive to write an erase gap. 1646 */ 1647 memset(&cmd, 0, sizeof(cmd)); 1648 cmd.opcode = ERASE; 1649 if (full) { 1650 cmd.byte2 = SE_LONG; 1651 tmo = ST_SPC_TIME; 1652 } else { 1653 tmo = ST_IO_TIME; 1654 } 1655 1656 /* 1657 * XXX We always do this asynchronously, for now, unless the device 1658 * has the ST_Q_ERASE_NOIMM quirk. How long should we wait if we 1659 * want to (eventually) to it synchronously? 1660 */ 1661 if ((st->quirks & ST_Q_ERASE_NOIMM) == 0) 1662 cmd.byte2 |= SE_IMMED; 1663 1664 return (scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1665 ST_RETRIES, tmo, NULL, flags)); 1666 } 1667 1668 /* 1669 * skip N blocks/filemarks/seq filemarks/eom 1670 */ 1671 static int 1672 st_space(struct st_softc *st, int number, u_int what, int flags) 1673 { 1674 struct scsi_space cmd; 1675 int error; 1676 1677 switch (what) { 1678 case SP_BLKS: 1679 if (st->flags & ST_PER_ACTION) { 1680 if (number > 0) { 1681 st->flags &= ~ST_PER_ACTION; 1682 return (EIO); 1683 } else if (number < 0) { 1684 if (st->flags & ST_AT_FILEMARK) { 1685 /* 1686 * Handling of ST_AT_FILEMARK 1687 * in st_space will fill in the 1688 * right file mark count. 1689 */ 1690 error = st_space(st, 0, SP_FILEMARKS, 1691 flags); 1692 if (error) 1693 return (error); 1694 } 1695 if (st->flags & ST_BLANK_READ) { 1696 st->flags &= ~ST_BLANK_READ; 1697 return (EIO); 1698 } 1699 st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); 1700 } 1701 } 1702 break; 1703 case SP_FILEMARKS: 1704 if (st->flags & ST_EIO_PENDING) { 1705 if (number > 0) { 1706 /* pretend we just discovered the error */ 1707 st->flags &= ~ST_EIO_PENDING; 1708 return (EIO); 1709 } else if (number < 0) { 1710 /* back away from the error */ 1711 st->flags &= ~ST_EIO_PENDING; 1712 } 1713 } 1714 if (st->flags & ST_AT_FILEMARK) { 1715 st->flags &= ~ST_AT_FILEMARK; 1716 number--; 1717 } 1718 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 1719 /* back away from unwritten tape */ 1720 st->flags &= ~ST_BLANK_READ; 1721 number++; /* XXX dubious */ 1722 } 1723 break; 1724 case SP_EOM: 1725 if (st->flags & ST_EOM_PENDING) { 1726 /* we're already there */ 1727 st->flags &= ~ST_EOM_PENDING; 1728 return (0); 1729 } 1730 if (st->flags & ST_EIO_PENDING) { 1731 /* pretend we just discovered the error */ 1732 st->flags &= ~ST_EIO_PENDING; 1733 return (EIO); 1734 } 1735 if (st->flags & ST_AT_FILEMARK) 1736 st->flags &= ~ST_AT_FILEMARK; 1737 break; 1738 } 1739 if (number == 0) 1740 return (0); 1741 1742 memset(&cmd, 0, sizeof(cmd)); 1743 cmd.opcode = SPACE; 1744 cmd.byte2 = what; 1745 _lto3b(number, cmd.number); 1746 1747 st->flags &= ~ST_POSUPDATED; 1748 st->last_ctl_resid = 0; 1749 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1750 0, ST_SPC_TIME, NULL, flags); 1751 1752 if (error == 0 && (st->flags & ST_POSUPDATED) == 0) { 1753 number = number - st->last_ctl_resid; 1754 if (what == SP_BLKS) { 1755 if (st->blkno != -1) { 1756 st->blkno += number; 1757 } 1758 } else if (what == SP_FILEMARKS) { 1759 if (st->fileno != -1) { 1760 st->fileno += number; 1761 if (number > 0) { 1762 st->blkno = 0; 1763 } else if (number < 0) { 1764 st->blkno = -1; 1765 } 1766 } 1767 } else if (what == SP_EOM) { 1768 /* 1769 * This loses us relative position. 1770 */ 1771 st->fileno = st->blkno = -1; 1772 } 1773 } 1774 return (error); 1775 } 1776 1777 /* 1778 * write N filemarks 1779 */ 1780 static int 1781 st_write_filemarks(struct st_softc *st, int number, int flags) 1782 { 1783 int error; 1784 struct scsi_write_filemarks cmd; 1785 1786 /* 1787 * It's hard to write a negative number of file marks. 1788 * Don't try. 1789 */ 1790 if (number < 0) 1791 return (EINVAL); 1792 switch (number) { 1793 case 0: /* really a command to sync the drive's buffers */ 1794 break; 1795 case 1: 1796 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 1797 st->flags &= ~ST_WRITTEN; 1798 else 1799 st->flags |= ST_FM_WRITTEN; 1800 st->flags &= ~ST_PER_ACTION; 1801 break; 1802 default: 1803 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 1804 } 1805 1806 memset(&cmd, 0, sizeof(cmd)); 1807 cmd.opcode = WRITE_FILEMARKS; 1808 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1809 cmd.byte2 = SR_IMMED; 1810 /* 1811 * The ATAPI Onstream DI-30 doesn't support writing filemarks, but 1812 * WRITE_FILEMARKS is still used to flush the buffer 1813 */ 1814 if ((st->quirks & ST_Q_NOFILEMARKS) == 0) 1815 _lto3b(number, cmd.number); 1816 1817 /* XXX WE NEED TO BE ABLE TO GET A RESIDIUAL XXX */ 1818 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1819 0, ST_IO_TIME * 4, NULL, flags); 1820 if (error == 0 && st->fileno != -1) { 1821 st->fileno += number; 1822 } 1823 return (error); 1824 } 1825 1826 /* 1827 * Make sure the right number of file marks is on tape if the 1828 * tape has been written. If the position argument is true, 1829 * leave the tape positioned where it was originally. 1830 * 1831 * nmarks returns the number of marks to skip (or, if position 1832 * true, which were skipped) to get back original position. 1833 */ 1834 static int 1835 st_check_eod(struct st_softc *st, boolean position, int *nmarks, int flags) 1836 { 1837 int error; 1838 1839 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 1840 default: 1841 *nmarks = 0; 1842 return (0); 1843 case ST_WRITTEN: 1844 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 1845 *nmarks = 1; 1846 break; 1847 case ST_WRITTEN | ST_2FM_AT_EOD: 1848 *nmarks = 2; 1849 } 1850 error = st_write_filemarks(st, *nmarks, flags); 1851 if (position && !error) 1852 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 1853 return (error); 1854 } 1855 1856 /* 1857 * load/unload/retension 1858 */ 1859 static int 1860 st_load(struct st_softc *st, u_int type, int flags) 1861 { 1862 int error; 1863 struct scsi_load cmd; 1864 1865 if (type != LD_LOAD) { 1866 int nmarks; 1867 1868 error = st_check_eod(st, FALSE, &nmarks, flags); 1869 if (error) { 1870 aprint_error_dev(&st->sc_dev, "failed to write closing filemarks at " 1871 "unload, errno=%d\n", error); 1872 return (error); 1873 } 1874 } 1875 if (st->quirks & ST_Q_IGNORE_LOADS) { 1876 if (type == LD_LOAD) { 1877 /* 1878 * If we ignore loads, at least we should try a rewind. 1879 */ 1880 return st_rewind(st, 0, flags); 1881 } 1882 /* otherwise, we should do what's asked of us */ 1883 } 1884 1885 memset(&cmd, 0, sizeof(cmd)); 1886 cmd.opcode = LOAD; 1887 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1888 cmd.byte2 = SR_IMMED; 1889 cmd.how = type; 1890 1891 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1892 ST_RETRIES, ST_SPC_TIME, NULL, flags); 1893 if (error) { 1894 aprint_error_dev(&st->sc_dev, "error %d in st_load (op %d)\n", 1895 error, type); 1896 } 1897 return (error); 1898 } 1899 1900 /* 1901 * Rewind the device 1902 */ 1903 static int 1904 st_rewind(struct st_softc *st, u_int immediate, int flags) 1905 { 1906 struct scsi_rewind cmd; 1907 int error; 1908 int nmarks; 1909 int timeout; 1910 1911 error = st_check_eod(st, FALSE, &nmarks, flags); 1912 if (error) { 1913 aprint_error_dev(&st->sc_dev, "failed to write closing filemarks at " 1914 "rewind, errno=%d\n", error); 1915 return (error); 1916 } 1917 st->flags &= ~ST_PER_ACTION; 1918 1919 /* If requestor asked for immediate response, set a short timeout */ 1920 timeout = immediate ? ST_CTL_TIME : ST_SPC_TIME; 1921 1922 /* 1923 * ATAPI tapes always need immediate to be set 1924 */ 1925 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1926 immediate = SR_IMMED; 1927 1928 memset(&cmd, 0, sizeof(cmd)); 1929 cmd.opcode = REWIND; 1930 cmd.byte2 = immediate; 1931 1932 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1933 ST_RETRIES, timeout, NULL, flags); 1934 if (error) { 1935 aprint_error_dev(&st->sc_dev, "error %d trying to rewind\n", 1936 error); 1937 /* lost position */ 1938 st->fileno = st->blkno = -1; 1939 } else { 1940 st->fileno = st->blkno = 0; 1941 } 1942 return (error); 1943 } 1944 1945 static int 1946 st_rdpos(struct st_softc *st, int hard, u_int32_t *blkptr) 1947 { 1948 int error; 1949 u_int8_t posdata[20]; 1950 struct scsi_tape_read_position cmd; 1951 1952 /* 1953 * We try and flush any buffered writes here if we were writing 1954 * and we're trying to get hardware block position. It eats 1955 * up performance substantially, but I'm wary of drive firmware. 1956 * 1957 * I think that *logical* block position is probably okay- 1958 * but hardware block position might have to wait for data 1959 * to hit media to be valid. Caveat Emptor. 1960 */ 1961 1962 if (hard && (st->flags & ST_WRITTEN)) { 1963 /* 1964 * First flush any pending writes... 1965 */ 1966 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 1967 /* 1968 * The latter case is for 'write protected' tapes 1969 * which are too stupid to recognize a zero count 1970 * for writing filemarks as a no-op. 1971 */ 1972 if (error != 0 && error != EACCES && error != EROFS) 1973 return (error); 1974 } 1975 1976 memset(&cmd, 0, sizeof(cmd)); 1977 memset(&posdata, 0, sizeof(posdata)); 1978 cmd.opcode = READ_POSITION; 1979 if (hard) 1980 cmd.byte1 = 1; 1981 1982 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 1983 (void *)&posdata, sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, 1984 XS_CTL_SILENT | XS_CTL_DATA_IN); 1985 1986 if (error == 0) { 1987 #if 0 1988 printf("posdata:"); 1989 for (hard = 0; hard < sizeof(posdata); hard++) 1990 printf("%02x ", posdata[hard] & 0xff); 1991 printf("\n"); 1992 #endif 1993 if (posdata[0] & 0x4) /* Block Position Unknown */ 1994 error = EINVAL; 1995 else 1996 *blkptr = _4btol(&posdata[4]); 1997 } 1998 return (error); 1999 } 2000 2001 static int 2002 st_setpos(struct st_softc *st, int hard, u_int32_t *blkptr) 2003 { 2004 int error; 2005 struct scsi_tape_locate cmd; 2006 2007 /* 2008 * We used to try and flush any buffered writes here. 2009 * Now we push this onto user applications to either 2010 * flush the pending writes themselves (via a zero count 2011 * WRITE FILEMARKS command) or they can trust their tape 2012 * drive to do this correctly for them. 2013 * 2014 * There are very ugly performance limitations otherwise. 2015 */ 2016 2017 memset(&cmd, 0, sizeof(cmd)); 2018 cmd.opcode = LOCATE; 2019 if (hard) 2020 cmd.byte2 = 1 << 2; 2021 _lto4b(*blkptr, cmd.blkaddr); 2022 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 2023 ST_RETRIES, ST_SPC_TIME, NULL, 0); 2024 /* 2025 * Note file && block number position now unknown (if 2026 * these things ever start being maintained in this driver) 2027 */ 2028 st->fileno = st->blkno = -1; 2029 return (error); 2030 } 2031 2032 2033 /* 2034 * Look at the returned sense and act on the error and determine 2035 * the unix error number to pass back..., 0 (== report no error), 2036 * -1 = retry the operation, -2 continue error processing. 2037 */ 2038 static int 2039 st_interpret_sense(struct scsipi_xfer *xs) 2040 { 2041 struct scsipi_periph *periph = xs->xs_periph; 2042 struct scsi_sense_data *sense = &xs->sense.scsi_sense; 2043 struct buf *bp = xs->bp; 2044 struct st_softc *st = (void *)periph->periph_dev; 2045 int retval = EJUSTRETURN; 2046 int doprint = ((xs->xs_control & XS_CTL_SILENT) == 0); 2047 u_int8_t key; 2048 int32_t info; 2049 2050 /* 2051 * If it isn't a extended or extended/deferred error, let 2052 * the generic code handle it. 2053 */ 2054 if (SSD_RCODE(sense->response_code) != SSD_RCODE_CURRENT && 2055 SSD_RCODE(sense->response_code) != SSD_RCODE_DEFERRED) 2056 return (retval); 2057 2058 if (sense->response_code & SSD_RCODE_VALID) 2059 info = _4btol(sense->info); 2060 else 2061 info = (st->flags & ST_FIXEDBLOCKS) ? 2062 xs->datalen / st->blksize : xs->datalen; 2063 key = SSD_SENSE_KEY(sense->flags); 2064 st->mt_erreg = key; 2065 st->asc = sense->asc; 2066 st->ascq = sense->ascq; 2067 st->mt_resid = (short) info; 2068 2069 if (key == SKEY_NOT_READY && st->asc == 0x4 && st->ascq == 0x1) { 2070 /* Not Ready, Logical Unit Is in Process Of Becoming Ready */ 2071 if (!callout_pending(&periph->periph_callout)) 2072 scsipi_periph_freeze(periph, 1); 2073 callout_reset(&periph->periph_callout, 2074 hz, scsipi_periph_timed_thaw, periph); 2075 return (ERESTART); 2076 } 2077 2078 /* 2079 * If the device is not open yet, let generic handle 2080 */ 2081 if ((periph->periph_flags & PERIPH_OPEN) == 0) { 2082 return (retval); 2083 } 2084 2085 xs->resid = info; 2086 if (st->flags & ST_FIXEDBLOCKS) { 2087 if (bp) { 2088 xs->resid *= st->blksize; 2089 st->last_io_resid = xs->resid; 2090 } else { 2091 st->last_ctl_resid = xs->resid; 2092 } 2093 if (key == SKEY_VOLUME_OVERFLOW) { 2094 st->flags |= ST_EIO_PENDING; 2095 if (bp) 2096 bp->b_resid = xs->resid; 2097 } else if (sense->flags & SSD_EOM) { 2098 if ((st->flags & ST_EARLYWARN) == 0) 2099 st->flags |= ST_EIO_PENDING; 2100 st->flags |= ST_EOM_PENDING; 2101 if (bp) { 2102 #if 0 2103 bp->b_resid = xs->resid; 2104 #else 2105 /* 2106 * Grotesque as it seems, the few times 2107 * I've actually seen a non-zero resid, 2108 * the tape drive actually lied and had 2109 * written all the data! 2110 */ 2111 bp->b_resid = 0; 2112 #endif 2113 } 2114 } 2115 if (sense->flags & SSD_FILEMARK) { 2116 st->flags |= ST_AT_FILEMARK; 2117 if (bp) 2118 bp->b_resid = xs->resid; 2119 if (st->fileno != (daddr_t) -1) { 2120 st->fileno++; 2121 st->blkno = 0; 2122 st->flags |= ST_POSUPDATED; 2123 } 2124 } 2125 if (sense->flags & SSD_ILI) { 2126 st->flags |= ST_EIO_PENDING; 2127 if (bp) 2128 bp->b_resid = xs->resid; 2129 if (sense->response_code & SSD_RCODE_VALID && 2130 (xs->xs_control & XS_CTL_SILENT) == 0) 2131 aprint_error_dev(&st->sc_dev, "block wrong size, %d blocks " 2132 "residual\n", info); 2133 2134 /* 2135 * This quirk code helps the drive read 2136 * the first tape block, regardless of 2137 * format. That is required for these 2138 * drives to return proper MODE SENSE 2139 * information. 2140 */ 2141 if ((st->quirks & ST_Q_SENSE_HELP) && 2142 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 2143 st->blksize -= 512; 2144 else if ((st->flags & ST_POSUPDATED) == 0) { 2145 if (st->blkno != (daddr_t) -1) { 2146 st->blkno += 2147 (xs->datalen / st->blksize); 2148 st->flags |= ST_POSUPDATED; 2149 } 2150 } 2151 } 2152 /* 2153 * If data wanted and no data was transferred, do it immediately 2154 */ 2155 if (xs->datalen && xs->resid >= xs->datalen) { 2156 if (st->flags & ST_EIO_PENDING) 2157 return (EIO); 2158 if (st->flags & ST_AT_FILEMARK) { 2159 if (bp) 2160 bp->b_resid = xs->resid; 2161 return (0); 2162 } 2163 } 2164 } else { /* must be variable mode */ 2165 if (bp) { 2166 st->last_io_resid = xs->resid; 2167 } else { 2168 st->last_ctl_resid = xs->resid; 2169 } 2170 if (sense->flags & SSD_EOM) { 2171 /* 2172 * The current semantics of this 2173 * driver requires EOM detection 2174 * to return EIO unless early 2175 * warning detection is enabled 2176 * for variable mode (this is always 2177 * on for fixed block mode). 2178 */ 2179 if (st->flags & ST_EARLYWARN) { 2180 st->flags |= ST_EOM_PENDING; 2181 retval = 0; 2182 } else { 2183 retval = EIO; 2184 /* 2185 * If we return an error we can't claim to 2186 * have transfered all data. 2187 */ 2188 if (xs->resid == 0) 2189 xs->resid = xs->datalen; 2190 } 2191 2192 /* 2193 * If it's an unadorned EOM detection, 2194 * suppress printing an error. 2195 */ 2196 if (key == SKEY_NO_SENSE) { 2197 doprint = 0; 2198 } 2199 } else if (sense->flags & SSD_FILEMARK) { 2200 retval = 0; 2201 if (st->fileno != (daddr_t) -1) { 2202 st->fileno++; 2203 st->blkno = 0; 2204 st->flags |= ST_POSUPDATED; 2205 } 2206 } else if (sense->flags & SSD_ILI) { 2207 if (info < 0) { 2208 /* 2209 * The tape record was bigger than the read 2210 * we issued. 2211 */ 2212 if ((xs->xs_control & XS_CTL_SILENT) == 0) { 2213 aprint_error_dev(&st->sc_dev, 2214 "%d-byte tape record too big" 2215 " for %d-byte user buffer\n", 2216 xs->datalen - info, xs->datalen); 2217 } 2218 retval = EIO; 2219 } else { 2220 retval = 0; 2221 if (st->blkno != (daddr_t) -1) { 2222 st->blkno++; 2223 st->flags |= ST_POSUPDATED; 2224 } 2225 } 2226 } 2227 if (bp) 2228 bp->b_resid = xs->resid; 2229 } 2230 2231 #ifndef SCSIPI_DEBUG 2232 if (retval == 0 && key == SKEY_NO_SENSE) 2233 doprint = 0; 2234 #endif 2235 if (key == SKEY_BLANK_CHECK) { 2236 /* 2237 * This quirk code helps the drive read the 2238 * first tape block, regardless of format. That 2239 * is required for these drives to return proper 2240 * MODE SENSE information. 2241 */ 2242 if ((st->quirks & ST_Q_SENSE_HELP) && 2243 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 2244 /* still starting */ 2245 st->blksize -= 512; 2246 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 2247 st->flags |= ST_BLANK_READ; 2248 xs->resid = xs->datalen; 2249 if (bp) { 2250 bp->b_resid = xs->resid; 2251 /* return an EOF */ 2252 } 2253 retval = 0; 2254 /* lost position */ 2255 st->fileno = st->blkno = -1; 2256 } 2257 } 2258 2259 /* 2260 * If generic sense processing will continue, we should not 2261 * print sense info here. 2262 */ 2263 if (retval == EJUSTRETURN) 2264 doprint = 0; 2265 2266 if (doprint) { 2267 2268 /* Print verbose sense info if possible */ 2269 if (scsipi_print_sense(xs, 0) != 0) 2270 return (retval); 2271 2272 /* Print less-verbose sense info */ 2273 scsipi_printaddr(periph); 2274 printf("Sense Key 0x%02x", key); 2275 if ((sense->response_code & SSD_RCODE_VALID) != 0) { 2276 switch (key) { 2277 case SKEY_NOT_READY: 2278 case SKEY_ILLEGAL_REQUEST: 2279 case SKEY_UNIT_ATTENTION: 2280 case SKEY_DATA_PROTECT: 2281 break; 2282 case SKEY_VOLUME_OVERFLOW: 2283 case SKEY_BLANK_CHECK: 2284 printf(", requested size: %d (decimal)", info); 2285 break; 2286 case SKEY_ABORTED_COMMAND: 2287 if (xs->xs_retries) 2288 printf(", retrying"); 2289 printf(", cmd 0x%x, info 0x%x", 2290 xs->cmd->opcode, info); 2291 break; 2292 default: 2293 printf(", info = %d (decimal)", info); 2294 } 2295 } 2296 if (sense->extra_len != 0) { 2297 int n; 2298 printf(", data ="); 2299 for (n = 0; n < sense->extra_len; n++) 2300 printf(" %02x", sense->csi[n]); 2301 } 2302 printf("\n"); 2303 } 2304 return (retval); 2305 } 2306 2307 /* 2308 * The quirk here is that the drive returns some value to st_mode_sense 2309 * incorrectly until the tape has actually passed by the head. 2310 * 2311 * The method is to set the drive to large fixed-block state (user-specified 2312 * density and 1024-byte blocks), then read and rewind to get it to sense the 2313 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 2314 * work, as a last resort, try variable- length blocks. The result will be 2315 * the ability to do an accurate st_mode_sense. 2316 * 2317 * We know we can do a rewind because we just did a load, which implies rewind. 2318 * Rewind seems preferable to space backward if we have a virgin tape. 2319 * 2320 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 2321 * error processing, both part of st_interpret_sense. 2322 */ 2323 static int 2324 st_touch_tape(struct st_softc *st) 2325 { 2326 char *bf; 2327 int readsize; 2328 int error; 2329 2330 bf = malloc(1024, M_TEMP, M_NOWAIT); 2331 if (bf == NULL) 2332 return (ENOMEM); 2333 2334 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 2335 goto bad; 2336 2337 /* 2338 * If the block size is already known from the 2339 * sense data, use it. Else start probing at 1024. 2340 */ 2341 if (st->media_blksize > 0) 2342 st->blksize = st->media_blksize; 2343 else 2344 st->blksize = 1024; 2345 2346 do { 2347 switch (st->blksize) { 2348 case 512: 2349 case 1024: 2350 readsize = st->blksize; 2351 st->flags |= ST_FIXEDBLOCKS; 2352 break; 2353 default: 2354 readsize = 1; 2355 st->flags &= ~ST_FIXEDBLOCKS; 2356 } 2357 if ((error = st->ops(st, ST_OPS_MODESELECT, XS_CTL_SILENT)) 2358 != 0) { 2359 /* 2360 * The device did not agree with the proposed 2361 * block size. If we exhausted our options, 2362 * return failure, else try another. 2363 */ 2364 if (readsize == 1) 2365 goto bad; 2366 st->blksize -= 512; 2367 continue; 2368 } 2369 st_read(st, bf, readsize, XS_CTL_SILENT); /* XXX */ 2370 if ((error = st_rewind(st, 0, 0)) != 0) { 2371 bad: free(bf, M_TEMP); 2372 return (error); 2373 } 2374 } while (readsize != 1 && readsize > st->blksize); 2375 2376 free(bf, M_TEMP); 2377 return (0); 2378 } 2379 2380 static int 2381 stdump(dev_t dev, daddr_t blkno, void *va, 2382 size_t size) 2383 { 2384 2385 /* Not implemented. */ 2386 return (ENXIO); 2387 } 2388 2389 /* 2390 * Send a filled out parameter structure to the drive to 2391 * set it into the desire modes etc. 2392 */ 2393 int 2394 st_mode_select(struct st_softc *st, int flags) 2395 { 2396 u_int select_len; 2397 struct select { 2398 struct scsi_mode_parameter_header_6 header; 2399 struct scsi_general_block_descriptor blk_desc; 2400 u_char sense_data[MAX_PAGE_0_SIZE]; 2401 } select; 2402 struct scsipi_periph *periph = st->sc_periph; 2403 2404 select_len = sizeof(select.header) + sizeof(select.blk_desc) + 2405 st->page_0_size; 2406 2407 /* 2408 * This quirk deals with drives that have only one valid mode 2409 * and think this gives them license to reject all mode selects, 2410 * even if the selected mode is the one that is supported. 2411 */ 2412 if (st->quirks & ST_Q_UNIMODAL) { 2413 SC_DEBUG(periph, SCSIPI_DB3, 2414 ("not setting density 0x%x blksize 0x%x\n", 2415 st->density, st->blksize)); 2416 return (0); 2417 } 2418 2419 /* 2420 * Set up for a mode select 2421 */ 2422 memset(&select, 0, sizeof(select)); 2423 select.header.blk_desc_len = sizeof(struct scsi_general_block_descriptor); 2424 select.header.dev_spec &= ~SMH_DSP_BUFF_MODE; 2425 select.blk_desc.density = st->density; 2426 if (st->flags & ST_DONTBUFFER) 2427 select.header.dev_spec |= SMH_DSP_BUFF_MODE_OFF; 2428 else 2429 select.header.dev_spec |= SMH_DSP_BUFF_MODE_ON; 2430 if (st->flags & ST_FIXEDBLOCKS) 2431 _lto3b(st->blksize, select.blk_desc.blklen); 2432 if (st->page_0_size) 2433 memcpy(select.sense_data, st->sense_data, st->page_0_size); 2434 2435 /* 2436 * do the command 2437 */ 2438 return scsipi_mode_select(periph, 0, &select.header, select_len, 2439 flags, ST_RETRIES, ST_CTL_TIME); 2440 } 2441
Indexes created Fri Sep 26 20:09:58 GMT 2025