st.c revision 1.217
1 /* $NetBSD: st.c,v 1.217 2010/05/30 04:38:04 pgoyette 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 2010/05/30 04:38:04 pgoyette Exp $"); 54 55 #include "opt_scsi.h" 56 57 #include <sys/param.h> 58 #include <sys/systm.h> 59 #include <sys/fcntl.h> 60 #include <sys/errno.h> 61 #include <sys/ioctl.h> 62 #include <sys/malloc.h> 63 #include <sys/buf.h> 64 #include <sys/bufq.h> 65 #include <sys/proc.h> 66 #include <sys/mtio.h> 67 #include <sys/device.h> 68 #include <sys/conf.h> 69 #include <sys/kernel.h> 70 #include <sys/vnode.h> 71 #include <sys/iostat.h> 72 #include <sys/sysctl.h> 73 74 #include <dev/scsipi/scsi_spc.h> 75 #include <dev/scsipi/scsipi_all.h> 76 #include <dev/scsipi/scsi_all.h> 77 #include <dev/scsipi/scsi_tape.h> 78 #include <dev/scsipi/scsipiconf.h> 79 #include <dev/scsipi/scsipi_base.h> 80 #include <dev/scsipi/stvar.h> 81 82 /* Defines for device specific stuff */ 83 #define DEF_FIXED_BSIZE 512 84 85 #define STMODE(z) ( minor(z) & 0x03) 86 #define STDSTY(z) ((minor(z) >> 2) & 0x03) 87 #define STUNIT(z) ((minor(z) >> 4) ) 88 #define STNMINOR 16 89 90 #define NORMAL_MODE 0 91 #define NOREW_MODE 1 92 #define EJECT_MODE 2 93 #define CTRL_MODE 3 94 95 #ifndef ST_MOUNT_DELAY 96 #define ST_MOUNT_DELAY 0 97 #endif 98 99 static dev_type_open(stopen); 100 static dev_type_close(stclose); 101 static dev_type_read(stread); 102 static dev_type_write(stwrite); 103 static dev_type_ioctl(stioctl); 104 static dev_type_strategy(ststrategy); 105 static dev_type_dump(stdump); 106 107 const struct bdevsw st_bdevsw = { 108 stopen, stclose, ststrategy, stioctl, stdump, nosize, D_TAPE 109 }; 110 111 const struct cdevsw st_cdevsw = { 112 stopen, stclose, stread, stwrite, stioctl, 113 nostop, notty, nopoll, nommap, nokqfilter, D_TAPE 114 }; 115 116 /* 117 * Define various devices that we know mis-behave in some way, 118 * and note how they are bad, so we can correct for them 119 */ 120 121 static const struct st_quirk_inquiry_pattern st_quirk_patterns[] = { 122 {{T_SEQUENTIAL, T_REMOV, 123 " ", " ", " "}, {0, 0, { 124 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 125 {ST_Q_FORCE_BLKSIZE, 512, QIC_24}, /* minor 4-7 */ 126 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_1600}, /* minor 8-11 */ 127 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_6250} /* minor 12-15 */ 128 }}}, 129 {{T_SEQUENTIAL, T_REMOV, 130 "TANDBERG", " TDC 3600 ", ""}, {0, 12, { 131 {0, 0, 0}, /* minor 0-3 */ 132 {ST_Q_FORCE_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 133 {0, 0, QIC_150}, /* minor 8-11 */ 134 {0, 0, QIC_120} /* minor 12-15 */ 135 }}}, 136 {{T_SEQUENTIAL, T_REMOV, 137 "TANDBERG", " TDC 3800 ", ""}, {0, 0, { 138 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 139 {0, 0, QIC_525}, /* minor 4-7 */ 140 {0, 0, QIC_150}, /* minor 8-11 */ 141 {0, 0, QIC_120} /* minor 12-15 */ 142 }}}, 143 {{T_SEQUENTIAL, T_REMOV, 144 "TANDBERG", " SLR5 4/8GB ", ""}, {0, 0, { 145 {ST_Q_FORCE_BLKSIZE, 1024, 0}, /* minor 0-3 */ 146 {0, 0, 0}, /* minor 4-7 */ 147 {0, 0, 0}, /* minor 8-11 */ 148 {0, 0, 0} /* minor 12-15 */ 149 }}}, 150 /* 151 * lacking a manual for the 4200, it's not clear what the 152 * specific density codes should be- the device is a 2.5GB 153 * capable QIC drive, those density codes aren't readily 154 * availabel. The 'default' will just have to do. 155 */ 156 {{T_SEQUENTIAL, T_REMOV, 157 "TANDBERG", " TDC 4200 ", ""}, {0, 0, { 158 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 159 {0, 0, QIC_525}, /* minor 4-7 */ 160 {0, 0, QIC_150}, /* minor 8-11 */ 161 {0, 0, QIC_120} /* minor 12-15 */ 162 }}}, 163 /* 164 * At least -005 and -007 need this. I'll assume they all do unless I 165 * hear otherwise. - mycroft, 31MAR1994 166 */ 167 {{T_SEQUENTIAL, T_REMOV, 168 "ARCHIVE ", "VIPER 2525 25462", ""}, {0, 0, { 169 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 170 {ST_Q_SENSE_HELP, 0, QIC_525}, /* minor 4-7 */ 171 {0, 0, QIC_150}, /* minor 8-11 */ 172 {0, 0, QIC_120} /* minor 12-15 */ 173 }}}, 174 /* 175 * One user reports that this works for his tape drive. It probably 176 * needs more work. - mycroft, 09APR1994 177 */ 178 {{T_SEQUENTIAL, T_REMOV, 179 "SANKYO ", "CP525 ", ""}, {0, 0, { 180 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 181 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 182 {0, 0, QIC_150}, /* minor 8-11 */ 183 {0, 0, QIC_120} /* minor 12-15 */ 184 }}}, 185 {{T_SEQUENTIAL, T_REMOV, 186 "ANRITSU ", "DMT780 ", ""}, {0, 0, { 187 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 188 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 189 {0, 0, QIC_150}, /* minor 8-11 */ 190 {0, 0, QIC_120} /* minor 12-15 */ 191 }}}, 192 {{T_SEQUENTIAL, T_REMOV, 193 "ARCHIVE ", "VIPER 150 21247", ""}, {ST_Q_ERASE_NOIMM, 12, { 194 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 195 {0, 0, QIC_150}, /* minor 4-7 */ 196 {0, 0, QIC_120}, /* minor 8-11 */ 197 {0, 0, QIC_24} /* minor 12-15 */ 198 }}}, 199 {{T_SEQUENTIAL, T_REMOV, 200 "ARCHIVE ", "VIPER 150 21531", ""}, {ST_Q_ERASE_NOIMM, 12, { 201 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 202 {0, 0, QIC_150}, /* minor 4-7 */ 203 {0, 0, QIC_120}, /* minor 8-11 */ 204 {0, 0, QIC_24} /* minor 12-15 */ 205 }}}, 206 {{T_SEQUENTIAL, T_REMOV, 207 "WANGTEK ", "5099ES SCSI", ""}, {0, 0, { 208 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 209 {0, 0, QIC_11}, /* minor 4-7 */ 210 {0, 0, QIC_24}, /* minor 8-11 */ 211 {0, 0, QIC_24} /* minor 12-15 */ 212 }}}, 213 {{T_SEQUENTIAL, T_REMOV, 214 "WANGTEK ", "5150ES SCSI", ""}, {0, 0, { 215 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 216 {0, 0, QIC_24}, /* minor 4-7 */ 217 {0, 0, QIC_120}, /* minor 8-11 */ 218 {0, 0, QIC_150} /* minor 12-15 */ 219 }}}, 220 {{T_SEQUENTIAL, T_REMOV, 221 "WANGTEK ", "5525ES SCSI REV7", ""}, {0, 0, { 222 {0, 0, 0}, /* minor 0-3 */ 223 {ST_Q_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 224 {0, 0, QIC_150}, /* minor 8-11 */ 225 {0, 0, QIC_120} /* minor 12-15 */ 226 }}}, 227 {{T_SEQUENTIAL, T_REMOV, 228 "WangDAT ", "Model 1300 ", ""}, {0, 0, { 229 {0, 0, 0}, /* minor 0-3 */ 230 {ST_Q_FORCE_BLKSIZE, 512, DDS}, /* minor 4-7 */ 231 {ST_Q_FORCE_BLKSIZE, 1024, DDS}, /* minor 8-11 */ 232 {ST_Q_FORCE_BLKSIZE, 0, DDS} /* minor 12-15 */ 233 }}}, 234 {{T_SEQUENTIAL, T_REMOV, 235 "EXABYTE ", "EXB-8200 ", "263H"}, {0, 5, { 236 {0, 0, 0}, /* minor 0-3 */ 237 {0, 0, 0}, /* minor 4-7 */ 238 {0, 0, 0}, /* minor 8-11 */ 239 {0, 0, 0} /* minor 12-15 */ 240 }}}, 241 {{T_SEQUENTIAL, T_REMOV, 242 "STK", "9490", ""}, 243 {ST_Q_FORCE_BLKSIZE, 0, { 244 {0, 0, 0}, /* minor 0-3 */ 245 {0, 0, 0}, /* minor 4-7 */ 246 {0, 0, 0}, /* minor 8-11 */ 247 {0, 0, 0} /* minor 12-15 */ 248 }}}, 249 {{T_SEQUENTIAL, T_REMOV, 250 "STK", "SD-3", ""}, 251 {ST_Q_FORCE_BLKSIZE, 0, { 252 {0, 0, 0}, /* minor 0-3 */ 253 {0, 0, 0}, /* minor 4-7 */ 254 {0, 0, 0}, /* minor 8-11 */ 255 {0, 0, 0} /* minor 12-15 */ 256 }}}, 257 {{T_SEQUENTIAL, T_REMOV, 258 "IBM", "03590", ""}, {ST_Q_IGNORE_LOADS, 0, { 259 {0, 0, 0}, /* minor 0-3 */ 260 {0, 0, 0}, /* minor 4-7 */ 261 {0, 0, 0}, /* minor 8-11 */ 262 {0, 0, 0} /* minor 12-15 */ 263 }}}, 264 {{T_SEQUENTIAL, T_REMOV, 265 "HP ", "T4000s ", ""}, {ST_Q_UNIMODAL, 0, { 266 {0, 0, QIC_3095}, /* minor 0-3 */ 267 {0, 0, QIC_3095}, /* minor 4-7 */ 268 {0, 0, QIC_3095}, /* minor 8-11 */ 269 {0, 0, QIC_3095}, /* minor 12-15 */ 270 }}}, 271 #if 0 272 {{T_SEQUENTIAL, T_REMOV, 273 "EXABYTE ", "EXB-8200 ", ""}, {0, 12, { 274 {0, 0, 0}, /* minor 0-3 */ 275 {0, 0, 0}, /* minor 4-7 */ 276 {0, 0, 0}, /* minor 8-11 */ 277 {0, 0, 0} /* minor 12-15 */ 278 }}}, 279 #endif 280 {{T_SEQUENTIAL, T_REMOV, 281 "TEAC ", "MT-2ST/N50 ", ""}, {ST_Q_IGNORE_LOADS, 0, { 282 {0, 0, 0}, /* minor 0-3 */ 283 {0, 0, 0}, /* minor 4-7 */ 284 {0, 0, 0}, /* minor 8-11 */ 285 {0, 0, 0} /* minor 12-15 */ 286 }}}, 287 {{T_SEQUENTIAL, T_REMOV, 288 "OnStream", "ADR50 Drive", ""}, {ST_Q_UNIMODAL, 0, { 289 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 290 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 4-7 */ 291 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 8-11 */ 292 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 12-15 */ 293 }}}, 294 {{T_SEQUENTIAL, T_REMOV, 295 "OnStream DI-30", "", "1.0"}, {ST_Q_NOFILEMARKS, 0, { 296 {0, 0, 0}, /* minor 0-3 */ 297 {0, 0, 0}, /* minor 4-7 */ 298 {0, 0, 0}, /* minor 8-11 */ 299 {0, 0, 0} /* minor 12-15 */ 300 }}}, 301 {{T_SEQUENTIAL, T_REMOV, 302 "NCR H621", "0-STD-03-46F880 ", ""}, {ST_Q_NOPREVENT, 0, { 303 {0, 0, 0}, /* minor 0-3 */ 304 {0, 0, 0}, /* minor 4-7 */ 305 {0, 0, 0}, /* minor 8-11 */ 306 {0, 0, 0} /* minor 12-15 */ 307 }}}, 308 {{T_SEQUENTIAL, T_REMOV, 309 "Seagate STT3401A", "hp0atxa", ""}, {0, 0, { 310 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 311 {ST_Q_FORCE_BLKSIZE, 1024, 0}, /* minor 4-7 */ 312 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 8-11 */ 313 {ST_Q_FORCE_BLKSIZE, 512, 0} /* minor 12-15 */ 314 }}}, 315 }; 316 317 #define NOEJECT 0 318 #define EJECT 1 319 320 static void st_identify_drive(struct st_softc *, 321 struct scsipi_inquiry_pattern *); 322 static void st_loadquirks(struct st_softc *); 323 static int st_mount_tape(dev_t, int); 324 static void st_unmount(struct st_softc *, boolean); 325 static int st_decide_mode(struct st_softc *, boolean); 326 static void ststart(struct scsipi_periph *); 327 static void strestart(void *); 328 static void stdone(struct scsipi_xfer *, int); 329 static int st_read(struct st_softc *, char *, int, int); 330 static int st_space(struct st_softc *, int, u_int, int); 331 static int st_write_filemarks(struct st_softc *, int, int); 332 static int st_check_eod(struct st_softc *, boolean, int *, int); 333 static int st_load(struct st_softc *, u_int, int); 334 static int st_rewind(struct st_softc *, u_int, int); 335 static int st_interpret_sense(struct scsipi_xfer *); 336 static int st_touch_tape(struct st_softc *); 337 static int st_erase(struct st_softc *, int full, int flags); 338 static int st_rdpos(struct st_softc *, int, u_int32_t *); 339 static int st_setpos(struct st_softc *, int, u_int32_t *); 340 341 static const struct scsipi_periphsw st_switch = { 342 st_interpret_sense, 343 ststart, 344 NULL, 345 stdone 346 }; 347 348 #if defined(ST_ENABLE_EARLYWARN) 349 #define ST_INIT_FLAGS ST_EARLYWARN 350 #else 351 #define ST_INIT_FLAGS 0 352 #endif 353 354 /* 355 * The routine called by the low level scsi routine when it discovers 356 * A device suitable for this driver 357 */ 358 void 359 stattach(device_t parent, struct st_softc *st, void *aux) 360 { 361 struct scsipibus_attach_args *sa = aux; 362 struct scsipi_periph *periph = sa->sa_periph; 363 364 SC_DEBUG(periph, SCSIPI_DB2, ("stattach: ")); 365 366 /* 367 * Store information needed to contact our base driver 368 */ 369 st->sc_periph = periph; 370 periph->periph_dev = &st->sc_dev; 371 periph->periph_switch = &st_switch; 372 373 /* 374 * Set initial flags 375 */ 376 377 st->flags = ST_INIT_FLAGS; 378 379 /* 380 * Set up the buf queue for this device 381 */ 382 bufq_alloc(&st->buf_queue, "fcfs", 0); 383 384 callout_init(&st->sc_callout, 0); 385 386 /* 387 * Check if the drive is a known criminal and take 388 * Any steps needed to bring it into line 389 */ 390 st_identify_drive(st, &sa->sa_inqbuf); 391 /* 392 * Use the subdriver to request information regarding the drive. 393 */ 394 printf("\n"); 395 printf("%s: %s", device_xname(&st->sc_dev), st->quirkdata ? "quirks apply, " : ""); 396 if (scsipi_test_unit_ready(periph, 397 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE) || 398 st->ops(st, ST_OPS_MODESENSE, 399 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE)) 400 printf("drive empty\n"); 401 else { 402 printf("density code %d, ", st->media_density); 403 if (st->media_blksize > 0) 404 printf("%d-byte", st->media_blksize); 405 else 406 printf("variable"); 407 printf(" blocks, write-%s\n", 408 (st->flags & ST_READONLY) ? "protected" : "enabled"); 409 } 410 411 st->stats = iostat_alloc(IOSTAT_TAPE, parent, device_xname(&st->sc_dev)); 412 413 #if NRND > 0 414 rnd_attach_source(&st->rnd_source, device_xname(&st->sc_dev), 415 RND_TYPE_TAPE, 0); 416 #endif 417 } 418 419 int 420 stdetach(device_t self, int flags) 421 { 422 struct st_softc *st = device_private(self); 423 int s, bmaj, cmaj, mn; 424 425 /* locate the major number */ 426 bmaj = bdevsw_lookup_major(&st_bdevsw); 427 cmaj = cdevsw_lookup_major(&st_cdevsw); 428 429 /* kill any pending restart */ 430 callout_stop(&st->sc_callout); 431 432 s = splbio(); 433 434 /* Kill off any queued buffers. */ 435 bufq_drain(st->buf_queue); 436 437 bufq_free(st->buf_queue); 438 439 /* Kill off any pending commands. */ 440 scsipi_kill_pending(st->sc_periph); 441 442 splx(s); 443 444 /* Nuke the vnodes for any open instances */ 445 mn = STUNIT(device_unit(self)); 446 vdevgone(bmaj, mn, mn+STNMINOR-1, VBLK); 447 vdevgone(cmaj, mn, mn+STNMINOR-1, VCHR); 448 449 iostat_free(st->stats); 450 451 #if NRND > 0 452 /* Unhook the entropy source. */ 453 rnd_detach_source(&st->rnd_source); 454 #endif 455 456 return (0); 457 } 458 459 /* 460 * Use the inquiry routine in 'scsi_base' to get drive info so we can 461 * Further tailor our behaviour. 462 */ 463 static void 464 st_identify_drive(struct st_softc *st, struct scsipi_inquiry_pattern *inqbuf) 465 { 466 const struct st_quirk_inquiry_pattern *finger; 467 int priority; 468 469 finger = scsipi_inqmatch(inqbuf, 470 st_quirk_patterns, 471 sizeof(st_quirk_patterns) / sizeof(st_quirk_patterns[0]), 472 sizeof(st_quirk_patterns[0]), &priority); 473 if (priority != 0) { 474 st->quirkdata = &finger->quirkdata; 475 st->drive_quirks = finger->quirkdata.quirks; 476 st->quirks = finger->quirkdata.quirks; /* start value */ 477 st->page_0_size = finger->quirkdata.page_0_size; 478 KASSERT(st->page_0_size <= MAX_PAGE_0_SIZE); 479 st_loadquirks(st); 480 } 481 } 482 483 /* 484 * initialise the subdevices to the default (QUIRK) state. 485 * this will remove any setting made by the system operator or previous 486 * operations. 487 */ 488 static void 489 st_loadquirks(struct st_softc *st) 490 { 491 int i; 492 const struct modes *mode; 493 struct modes *mode2; 494 495 mode = st->quirkdata->modes; 496 mode2 = st->modes; 497 for (i = 0; i < 4; i++) { 498 memset(mode2, 0, sizeof(struct modes)); 499 st->modeflags[i] &= ~(BLKSIZE_SET_BY_QUIRK | 500 DENSITY_SET_BY_QUIRK | BLKSIZE_SET_BY_USER | 501 DENSITY_SET_BY_USER); 502 if ((mode->quirks | st->drive_quirks) & ST_Q_FORCE_BLKSIZE) { 503 mode2->blksize = mode->blksize; 504 st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; 505 } 506 if (mode->density) { 507 mode2->density = mode->density; 508 st->modeflags[i] |= DENSITY_SET_BY_QUIRK; 509 } 510 mode2->quirks |= mode->quirks; 511 mode++; 512 mode2++; 513 } 514 } 515 516 /* 517 * open the device. 518 */ 519 static int 520 stopen(dev_t dev, int flags, int mode, struct lwp *l) 521 { 522 u_int stmode, dsty; 523 int error, sflags, unit, tries, ntries; 524 struct st_softc *st; 525 struct scsipi_periph *periph; 526 struct scsipi_adapter *adapt; 527 528 unit = STUNIT(dev); 529 st = device_lookup_private(&st_cd, unit); 530 if (st == NULL) 531 return (ENXIO); 532 533 stmode = STMODE(dev); 534 dsty = STDSTY(dev); 535 536 periph = st->sc_periph; 537 adapt = periph->periph_channel->chan_adapter; 538 539 SC_DEBUG(periph, SCSIPI_DB1, ("open: dev=0x%"PRIx64" (unit %d (of %d))\n", dev, 540 unit, st_cd.cd_ndevs)); 541 542 543 /* 544 * Only allow one at a time 545 */ 546 if (periph->periph_flags & PERIPH_OPEN) { 547 aprint_error_dev(&st->sc_dev, "already open\n"); 548 return (EBUSY); 549 } 550 551 if ((error = scsipi_adapter_addref(adapt)) != 0) 552 return (error); 553 554 /* 555 * clear any latched errors. 556 */ 557 st->mt_resid = 0; 558 st->mt_erreg = 0; 559 st->asc = 0; 560 st->ascq = 0; 561 562 /* 563 * Catch any unit attention errors. Be silent about this 564 * unless we're already mounted. We ignore media change 565 * if we're in control mode or not mounted yet. 566 */ 567 if ((st->flags & ST_MOUNTED) == 0 || stmode == CTRL_MODE) { 568 #ifdef SCSIDEBUG 569 sflags = XS_CTL_IGNORE_MEDIA_CHANGE; 570 #else 571 sflags = XS_CTL_SILENT|XS_CTL_IGNORE_MEDIA_CHANGE; 572 #endif 573 } else 574 sflags = 0; 575 576 /* 577 * If we're already mounted or we aren't configured for 578 * a mount delay, only try a test unit ready once. Otherwise, 579 * try up to ST_MOUNT_DELAY times with a rest interval of 580 * one second between each try. 581 */ 582 583 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0) { 584 ntries = 1; 585 } else { 586 ntries = ST_MOUNT_DELAY; 587 } 588 589 for (error = tries = 0; tries < ntries; tries++) { 590 int slpintr, oflags; 591 592 /* 593 * If we had no error, or we're opening the control mode 594 * device, we jump out right away. 595 */ 596 597 error = scsipi_test_unit_ready(periph, sflags); 598 if (error == 0 || stmode == CTRL_MODE) { 599 break; 600 } 601 602 /* 603 * We had an error. 604 * 605 * If we're already mounted or we aren't configured for 606 * a mount delay, or the error isn't a NOT READY error, 607 * skip to the error exit now. 608 */ 609 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0 || 610 (st->mt_key != SKEY_NOT_READY)) { 611 goto bad; 612 } 613 614 /* 615 * clear any latched errors. 616 */ 617 st->mt_resid = 0; 618 st->mt_erreg = 0; 619 st->asc = 0; 620 st->ascq = 0; 621 622 /* 623 * Fake that we have the device open so 624 * we block other apps from getting in. 625 */ 626 627 oflags = periph->periph_flags; 628 periph->periph_flags |= PERIPH_OPEN; 629 630 slpintr = kpause("stload", true, hz, NULL); 631 632 periph->periph_flags = oflags; /* restore flags */ 633 if (slpintr != 0 && slpintr != EWOULDBLOCK) { 634 goto bad; 635 } 636 } 637 638 639 /* 640 * If the mode is 3 (e.g. minor = 3,7,11,15) then the device has 641 * been opened to set defaults and perform other, usually non-I/O 642 * related, operations. In this case, do a quick check to see 643 * whether the unit actually had a tape loaded (this will be known 644 * as to whether or not we got a NOT READY for the above 645 * unit attention). If a tape is there, go do a mount sequence. 646 */ 647 if (stmode == CTRL_MODE && st->mt_key == SKEY_NOT_READY) { 648 periph->periph_flags |= PERIPH_OPEN; 649 return (0); 650 } 651 652 /* 653 * If we get this far and had an error set, that means we failed 654 * to pass the 'test unit ready' test for the non-controlmode device, 655 * so we bounce the open. 656 */ 657 658 if (error) 659 return (error); 660 661 /* 662 * Else, we're now committed to saying we're open. 663 */ 664 665 periph->periph_flags |= PERIPH_OPEN; /* unit attn are now errors */ 666 667 /* 668 * If it's a different mode, or if the media has been 669 * invalidated, unmount the tape from the previous 670 * session but continue with open processing 671 */ 672 if (st->last_dsty != dsty || 673 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 674 st_unmount(st, NOEJECT); 675 676 /* 677 * If we are not mounted, then we should start a new 678 * mount session. 679 */ 680 if (!(st->flags & ST_MOUNTED)) { 681 if ((error = st_mount_tape(dev, flags)) != 0) 682 goto bad; 683 st->last_dsty = dsty; 684 } 685 if (!(st->quirks & ST_Q_NOPREVENT)) { 686 scsipi_prevent(periph, SPAMR_PREVENT_DT, 687 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 688 } 689 690 SC_DEBUG(periph, SCSIPI_DB2, ("open complete\n")); 691 return (0); 692 693 bad: 694 st_unmount(st, NOEJECT); 695 scsipi_adapter_delref(adapt); 696 periph->periph_flags &= ~PERIPH_OPEN; 697 return (error); 698 } 699 700 /* 701 * close the device.. only called if we are the LAST 702 * occurence of an open device 703 */ 704 static int 705 stclose(dev_t dev, int flags, int mode, struct lwp *l) 706 { 707 int stxx, error = 0; 708 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(dev)); 709 struct scsipi_periph *periph = st->sc_periph; 710 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 711 712 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("closing\n")); 713 714 /* 715 * Make sure that a tape opened in write-only mode will have 716 * file marks written on it when closed, even if not written to. 717 * 718 * This is for SUN compatibility. Actually, the Sun way of 719 * things is to: 720 * 721 * only write filemarks if there are fmks to be written and 722 * - open for write (possibly read/write) 723 * - the last operation was a write 724 * or: 725 * - opened for wronly 726 * - no data was written (including filemarks) 727 */ 728 729 stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); 730 if (((flags & FWRITE) && stxx == ST_WRITTEN) || 731 ((flags & O_ACCMODE) == FWRITE && stxx == 0)) { 732 int nm; 733 error = st_check_eod(st, FALSE, &nm, 0); 734 } 735 736 /* 737 * Allow robots to eject tape if needed. 738 */ 739 scsipi_prevent(periph, SPAMR_ALLOW, 740 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 741 742 switch (STMODE(dev)) { 743 case NORMAL_MODE: 744 st_unmount(st, NOEJECT); 745 break; 746 case NOREW_MODE: 747 case CTRL_MODE: 748 /* 749 * Leave mounted unless media seems to have been removed. 750 * 751 * Otherwise, if we're to terminate a tape with more than one 752 * filemark [ and because we're not rewinding here ], backspace 753 * one filemark so that later appends will see an unbroken 754 * sequence of: 755 * 756 * file - FMK - file - FMK ... file - FMK FMK (EOM) 757 */ 758 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 759 st_unmount(st, NOEJECT); 760 } else if (error == 0) { 761 /* 762 * ST_WRITTEN was preserved from above. 763 * 764 * All we need to know here is: 765 * 766 * Were we writing this tape and was the last 767 * operation a write? 768 * 769 * Are there supposed to be 2FM at EOD? 770 * 771 * If both statements are true, then we backspace 772 * one filemark. 773 */ 774 stxx |= (st->flags & ST_2FM_AT_EOD); 775 if ((flags & FWRITE) != 0 && 776 (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { 777 error = st_space(st, -1, SP_FILEMARKS, 0); 778 } 779 } 780 break; 781 case EJECT_MODE: 782 st_unmount(st, EJECT); 783 break; 784 } 785 786 scsipi_wait_drain(periph); 787 788 scsipi_adapter_delref(adapt); 789 periph->periph_flags &= ~PERIPH_OPEN; 790 791 return (error); 792 } 793 794 /* 795 * Start a new mount session. 796 * Copy in all the default parameters from the selected device mode. 797 * and try guess any that seem to be defaulted. 798 */ 799 static int 800 st_mount_tape(dev_t dev, int flags) 801 { 802 int unit; 803 u_int dsty; 804 struct st_softc *st; 805 struct scsipi_periph *periph; 806 int error = 0; 807 808 unit = STUNIT(dev); 809 dsty = STDSTY(dev); 810 st = device_lookup_private(&st_cd, unit); 811 periph = st->sc_periph; 812 813 if (st->flags & ST_MOUNTED) 814 return (0); 815 816 SC_DEBUG(periph, SCSIPI_DB1, ("mounting\n ")); 817 st->flags |= ST_NEW_MOUNT; 818 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 819 /* 820 * If the media is new, then make sure we give it a chance to 821 * to do a 'load' instruction. (We assume it is new.) 822 */ 823 if ((error = st_load(st, LD_LOAD, XS_CTL_SILENT)) != 0) 824 return (error); 825 /* 826 * Throw another dummy instruction to catch 827 * 'Unit attention' errors. Many drives give 828 * these after doing a Load instruction (with 829 * the MEDIUM MAY HAVE CHANGED asc/ascq). 830 */ 831 scsipi_test_unit_ready(periph, XS_CTL_SILENT); /* XXX */ 832 833 /* 834 * Some devices can't tell you much until they have been 835 * asked to look at the media. This quirk does this. 836 */ 837 if (st->quirks & ST_Q_SENSE_HELP) 838 if ((error = st_touch_tape(st)) != 0) 839 return (error); 840 /* 841 * Load the physical device parameters 842 * loads: blkmin, blkmax 843 */ 844 if ((error = st->ops(st, ST_OPS_RBL, 0)) != 0) 845 return (error); 846 /* 847 * Load the media dependent parameters 848 * includes: media_blksize,media_density,numblks 849 * As we have a tape in, it should be reflected here. 850 * If not you may need the "quirk" above. 851 */ 852 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 853 return (error); 854 /* 855 * If we have gained a permanent density from somewhere, 856 * then use it in preference to the one supplied by 857 * default by the driver. 858 */ 859 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 860 st->density = st->modes[dsty].density; 861 else 862 st->density = st->media_density; 863 /* 864 * If we have gained a permanent blocksize 865 * then use it in preference to the one supplied by 866 * default by the driver. 867 */ 868 st->flags &= ~ST_FIXEDBLOCKS; 869 if (st->modeflags[dsty] & 870 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 871 st->blksize = st->modes[dsty].blksize; 872 if (st->blksize) 873 st->flags |= ST_FIXEDBLOCKS; 874 } else { 875 if ((error = st_decide_mode(st, FALSE)) != 0) 876 return (error); 877 } 878 if ((error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 879 /* ATAPI will return ENODEV for this, and this may be OK */ 880 if (error != ENODEV) { 881 aprint_error_dev(&st->sc_dev, "cannot set selected mode\n"); 882 return (error); 883 } 884 } 885 st->flags &= ~ST_NEW_MOUNT; 886 st->flags |= ST_MOUNTED; 887 periph->periph_flags |= PERIPH_MEDIA_LOADED; /* move earlier? */ 888 st->blkno = st->fileno = (daddr_t) 0; 889 return (0); 890 } 891 892 /* 893 * End the present mount session. 894 * Rewind, and optionally eject the tape. 895 * Reset various flags to indicate that all new 896 * operations require another mount operation 897 */ 898 static void 899 st_unmount(struct st_softc *st, boolean eject) 900 { 901 struct scsipi_periph *periph = st->sc_periph; 902 int nmarks; 903 904 if ((st->flags & ST_MOUNTED) == 0) 905 return; 906 SC_DEBUG(periph, SCSIPI_DB1, ("unmounting\n")); 907 st_check_eod(st, FALSE, &nmarks, XS_CTL_IGNORE_NOT_READY); 908 st_rewind(st, 0, XS_CTL_IGNORE_NOT_READY); 909 910 /* 911 * Section 9.3.3 of the SCSI specs states that a device shall return 912 * the density value specified in the last succesfull MODE SELECT 913 * after an unload operation, in case it is not able to 914 * automatically determine the density of the new medium. 915 * 916 * So we instruct the device to use the default density, which will 917 * prevent the use of stale density values (in particular, 918 * in st_touch_tape(). 919 */ 920 st->density = 0; 921 if (st->ops(st, ST_OPS_MODESELECT, 0) != 0) { 922 aprint_error_dev(&st->sc_dev, "WARNING: cannot revert to default density\n"); 923 } 924 925 if (eject) { 926 if (!(st->quirks & ST_Q_NOPREVENT)) { 927 scsipi_prevent(periph, SPAMR_ALLOW, 928 XS_CTL_IGNORE_ILLEGAL_REQUEST | 929 XS_CTL_IGNORE_NOT_READY); 930 } 931 st_load(st, LD_UNLOAD, XS_CTL_IGNORE_NOT_READY); 932 st->blkno = st->fileno = (daddr_t) -1; 933 } else { 934 st->blkno = st->fileno = (daddr_t) 0; 935 } 936 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 937 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 938 } 939 940 /* 941 * Given all we know about the device, media, mode, 'quirks' and 942 * initial operation, make a decision as to how we should be set 943 * to run (regarding blocking and EOD marks) 944 */ 945 int 946 st_decide_mode(struct st_softc *st, boolean first_read) 947 { 948 949 SC_DEBUG(st->sc_periph, SCSIPI_DB2, ("starting block mode decision\n")); 950 951 /* 952 * If the drive can only handle fixed-length blocks and only at 953 * one size, perhaps we should just do that. 954 */ 955 if (st->blkmin && (st->blkmin == st->blkmax)) { 956 st->flags |= ST_FIXEDBLOCKS; 957 st->blksize = st->blkmin; 958 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 959 ("blkmin == blkmax of %d\n", st->blkmin)); 960 goto done; 961 } 962 /* 963 * If the tape density mandates (or even suggests) use of fixed 964 * or variable-length blocks, comply. 965 */ 966 switch (st->density) { 967 case HALFINCH_800: 968 case HALFINCH_1600: 969 case HALFINCH_6250: 970 case DDS: 971 st->flags &= ~ST_FIXEDBLOCKS; 972 st->blksize = 0; 973 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 974 ("density specified variable\n")); 975 goto done; 976 case QIC_11: 977 case QIC_24: 978 case QIC_120: 979 case QIC_150: 980 case QIC_525: 981 case QIC_1320: 982 case QIC_3095: 983 case QIC_3220: 984 st->flags |= ST_FIXEDBLOCKS; 985 if (st->media_blksize > 0) 986 st->blksize = st->media_blksize; 987 else 988 st->blksize = DEF_FIXED_BSIZE; 989 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 990 ("density specified fixed\n")); 991 goto done; 992 } 993 /* 994 * If we're about to read the tape, perhaps we should choose 995 * fixed or variable-length blocks and block size according to 996 * what the drive found on the tape. 997 */ 998 if (first_read && 999 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 1000 (st->media_blksize == DEF_FIXED_BSIZE) || 1001 (st->media_blksize == 1024))) { 1002 if (st->media_blksize > 0) 1003 st->flags |= ST_FIXEDBLOCKS; 1004 else 1005 st->flags &= ~ST_FIXEDBLOCKS; 1006 st->blksize = st->media_blksize; 1007 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1008 ("Used media_blksize of %d\n", st->media_blksize)); 1009 goto done; 1010 } 1011 /* 1012 * We're getting no hints from any direction. Choose variable- 1013 * length blocks arbitrarily. 1014 */ 1015 st->flags &= ~ST_FIXEDBLOCKS; 1016 st->blksize = 0; 1017 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1018 ("Give up and default to variable mode\n")); 1019 1020 done: 1021 /* 1022 * Decide whether or not to write two file marks to signify end- 1023 * of-data. Make the decision as a function of density. If 1024 * the decision is not to use a second file mark, the SCSI BLANK 1025 * CHECK condition code will be recognized as end-of-data when 1026 * first read. 1027 * (I think this should be a by-product of fixed/variable..julian) 1028 */ 1029 switch (st->density) { 1030 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 1031 case QIC_11: 1032 case QIC_24: 1033 case QIC_120: 1034 case QIC_150: 1035 case QIC_525: 1036 case QIC_1320: 1037 case QIC_3095: 1038 case QIC_3220: 1039 st->flags &= ~ST_2FM_AT_EOD; 1040 break; 1041 default: 1042 st->flags |= ST_2FM_AT_EOD; 1043 } 1044 return (0); 1045 } 1046 1047 /* 1048 * Actually translate the requested transfer into 1049 * one the physical driver can understand 1050 * The transfer is described by a buf and will include 1051 * only one physical transfer. 1052 */ 1053 static void 1054 ststrategy(struct buf *bp) 1055 { 1056 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(bp->b_dev)); 1057 int s; 1058 1059 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1060 ("ststrategy %d bytes @ blk %" PRId64 "\n", bp->b_bcount, bp->b_blkno)); 1061 /* 1062 * If it's a null transfer, return immediately 1063 */ 1064 if (bp->b_bcount == 0) 1065 goto abort; 1066 1067 /* If offset is negative, error */ 1068 if (bp->b_blkno < 0) { 1069 bp->b_error = EINVAL; 1070 goto abort; 1071 } 1072 1073 /* 1074 * Odd sized request on fixed drives are verboten 1075 */ 1076 if (st->flags & ST_FIXEDBLOCKS) { 1077 if (bp->b_bcount % st->blksize) { 1078 aprint_error_dev(&st->sc_dev, "bad request, must be multiple of %d\n", 1079 st->blksize); 1080 bp->b_error = EIO; 1081 goto abort; 1082 } 1083 } 1084 /* 1085 * as are out-of-range requests on variable drives. 1086 */ 1087 else if (bp->b_bcount < st->blkmin || 1088 (st->blkmax && bp->b_bcount > st->blkmax)) { 1089 aprint_error_dev(&st->sc_dev, "bad request, must be between %d and %d\n", 1090 st->blkmin, st->blkmax); 1091 bp->b_error = EIO; 1092 goto abort; 1093 } 1094 s = splbio(); 1095 1096 /* 1097 * Place it in the queue of activities for this tape 1098 * at the end (a bit silly because we only have on user.. 1099 * (but it could fork())) 1100 */ 1101 bufq_put(st->buf_queue, bp); 1102 1103 /* 1104 * Tell the device to get going on the transfer if it's 1105 * not doing anything, otherwise just wait for completion 1106 * (All a bit silly if we're only allowing 1 open but..) 1107 */ 1108 ststart(st->sc_periph); 1109 1110 splx(s); 1111 return; 1112 abort: 1113 /* 1114 * Reset the residue because we didn't do anything, 1115 * and send the buffer back as done. 1116 */ 1117 bp->b_resid = bp->b_bcount; 1118 biodone(bp); 1119 return; 1120 } 1121 1122 /* 1123 * ststart looks to see if there is a buf waiting for the device 1124 * and that the device is not already busy. If both are true, 1125 * It dequeues the buf and creates a scsi command to perform the 1126 * transfer required. The transfer request will call scsipi_done 1127 * on completion, which will in turn call this routine again 1128 * so that the next queued transfer is performed. 1129 * The bufs are queued by the strategy routine (ststrategy) 1130 * 1131 * This routine is also called after other non-queued requests 1132 * have been made of the scsi driver, to ensure that the queue 1133 * continues to be drained. 1134 * ststart() is called at splbio 1135 */ 1136 static void 1137 ststart(struct scsipi_periph *periph) 1138 { 1139 struct st_softc *st = (void *)periph->periph_dev; 1140 struct buf *bp; 1141 struct scsi_rw_tape cmd; 1142 struct scsipi_xfer *xs; 1143 int flags, error; 1144 1145 SC_DEBUG(periph, SCSIPI_DB2, ("ststart ")); 1146 /* 1147 * See if there is a buf to do and we are not already 1148 * doing one 1149 */ 1150 while (periph->periph_active < periph->periph_openings) { 1151 /* if a special awaits, let it proceed first */ 1152 if (periph->periph_flags & PERIPH_WAITING) { 1153 periph->periph_flags &= ~PERIPH_WAITING; 1154 wakeup((void *)periph); 1155 return; 1156 } 1157 1158 /* 1159 * If the device has been unmounted by the user 1160 * then throw away all requests until done. 1161 */ 1162 if (__predict_false((st->flags & ST_MOUNTED) == 0 || 1163 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0)) { 1164 if ((bp = bufq_get(st->buf_queue)) != NULL) { 1165 /* make sure that one implies the other.. */ 1166 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 1167 bp->b_error = EIO; 1168 bp->b_resid = bp->b_bcount; 1169 biodone(bp); 1170 continue; 1171 } else { 1172 return; 1173 } 1174 } 1175 1176 if ((bp = bufq_peek(st->buf_queue)) == NULL) 1177 return; 1178 1179 iostat_busy(st->stats); 1180 1181 /* 1182 * only FIXEDBLOCK devices have pending I/O or space operations. 1183 */ 1184 if (st->flags & ST_FIXEDBLOCKS) { 1185 /* 1186 * If we are at a filemark but have not reported it yet 1187 * then we should report it now 1188 */ 1189 if (st->flags & ST_AT_FILEMARK) { 1190 if ((bp->b_flags & B_READ) == B_WRITE) { 1191 /* 1192 * Handling of ST_AT_FILEMARK in 1193 * st_space will fill in the right file 1194 * mark count. 1195 * Back up over filemark 1196 */ 1197 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1198 bufq_get(st->buf_queue); 1199 bp->b_error = EIO; 1200 bp->b_resid = bp->b_bcount; 1201 biodone(bp); 1202 continue; 1203 } 1204 } else { 1205 bufq_get(st->buf_queue); 1206 bp->b_resid = bp->b_bcount; 1207 bp->b_error = 0; 1208 st->flags &= ~ST_AT_FILEMARK; 1209 biodone(bp); 1210 continue; /* seek more work */ 1211 } 1212 } 1213 } 1214 /* 1215 * If we are at EOM but have not reported it 1216 * yet then we should report it now. 1217 */ 1218 if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { 1219 bufq_get(st->buf_queue); 1220 bp->b_resid = bp->b_bcount; 1221 if (st->flags & ST_EIO_PENDING) 1222 bp->b_error = EIO; 1223 st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); 1224 biodone(bp); 1225 continue; /* seek more work */ 1226 } 1227 1228 /* 1229 * Fill out the scsi command 1230 */ 1231 memset(&cmd, 0, sizeof(cmd)); 1232 flags = XS_CTL_NOSLEEP | XS_CTL_ASYNC; 1233 if ((bp->b_flags & B_READ) == B_WRITE) { 1234 cmd.opcode = WRITE; 1235 st->flags &= ~ST_FM_WRITTEN; 1236 flags |= XS_CTL_DATA_OUT; 1237 } else { 1238 cmd.opcode = READ; 1239 flags |= XS_CTL_DATA_IN; 1240 } 1241 1242 /* 1243 * Handle "fixed-block-mode" tape drives by using the 1244 * block count instead of the length. 1245 */ 1246 if (st->flags & ST_FIXEDBLOCKS) { 1247 cmd.byte2 |= SRW_FIXED; 1248 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1249 } else 1250 _lto3b(bp->b_bcount, cmd.len); 1251 1252 /* 1253 * Clear 'position updated' indicator 1254 */ 1255 st->flags &= ~ST_POSUPDATED; 1256 1257 /* 1258 * go ask the adapter to do all this for us 1259 */ 1260 xs = scsipi_make_xs(periph, 1261 (struct scsipi_generic *)&cmd, sizeof(cmd), 1262 (u_char *)bp->b_data, bp->b_bcount, 1263 0, ST_IO_TIME, bp, flags); 1264 if (__predict_false(xs == NULL)) { 1265 /* 1266 * out of memory. Keep this buffer in the queue, and 1267 * retry later. 1268 */ 1269 callout_reset(&st->sc_callout, hz / 2, strestart, 1270 periph); 1271 return; 1272 } 1273 /* 1274 * need to dequeue the buffer before queuing the command, 1275 * because cdstart may be called recursively from the 1276 * HBA driver 1277 */ 1278 #ifdef DIAGNOSTIC 1279 if (bufq_get(st->buf_queue) != bp) 1280 panic("ststart(): dequeued wrong buf"); 1281 #else 1282 bufq_get(st->buf_queue); 1283 #endif 1284 error = scsipi_execute_xs(xs); 1285 /* with a scsipi_xfer preallocated, scsipi_command can't fail */ 1286 KASSERT(error == 0); 1287 } /* go back and see if we can cram more work in.. */ 1288 } 1289 1290 static void 1291 strestart(void *v) 1292 { 1293 int s = splbio(); 1294 ststart((struct scsipi_periph *)v); 1295 splx(s); 1296 } 1297 1298 1299 static void 1300 stdone(struct scsipi_xfer *xs, int error) 1301 { 1302 struct st_softc *st = (void *)xs->xs_periph->periph_dev; 1303 struct buf *bp = xs->bp; 1304 1305 if (bp) { 1306 bp->b_error = error; 1307 bp->b_resid = xs->resid; 1308 /* 1309 * buggy device ? A SDLT320 can report an info 1310 * field of 0x3de8000 on a Media Error/Write Error 1311 * for this CBD: 0x0a 00 00 80 00 00 1312 */ 1313 if (bp->b_resid > bp->b_bcount || bp->b_resid < 0) 1314 bp->b_resid = bp->b_bcount; 1315 1316 if ((bp->b_flags & B_READ) == B_WRITE) 1317 st->flags |= ST_WRITTEN; 1318 else 1319 st->flags &= ~ST_WRITTEN; 1320 1321 iostat_unbusy(st->stats, bp->b_bcount, 1322 ((bp->b_flags & B_READ) == B_READ)); 1323 1324 #if NRND > 0 1325 rnd_add_uint32(&st->rnd_source, bp->b_blkno); 1326 #endif 1327 1328 if ((st->flags & ST_POSUPDATED) == 0) { 1329 if (error) { 1330 st->fileno = st->blkno = -1; 1331 } else if (st->blkno != -1) { 1332 if (st->flags & ST_FIXEDBLOCKS) 1333 st->blkno += 1334 (bp->b_bcount / st->blksize); 1335 else 1336 st->blkno++; 1337 } 1338 } 1339 1340 biodone(bp); 1341 } 1342 } 1343 1344 static int 1345 stread(dev_t dev, struct uio *uio, int iomode) 1346 { 1347 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(dev)); 1348 1349 return (physio(ststrategy, NULL, dev, B_READ, 1350 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1351 } 1352 1353 static int 1354 stwrite(dev_t dev, struct uio *uio, int iomode) 1355 { 1356 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(dev)); 1357 1358 return (physio(ststrategy, NULL, dev, B_WRITE, 1359 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1360 } 1361 1362 /* 1363 * Perform special action on behalf of the user; 1364 * knows about the internals of this device 1365 */ 1366 static int 1367 stioctl(dev_t dev, u_long cmd, void *arg, int flag, struct lwp *l) 1368 { 1369 int error = 0; 1370 int unit; 1371 int number, nmarks, dsty; 1372 int flags; 1373 struct st_softc *st; 1374 int hold_blksize; 1375 u_int8_t hold_density; 1376 struct mtop *mt = (struct mtop *) arg; 1377 1378 /* 1379 * Find the device that the user is talking about 1380 */ 1381 flags = 0; /* give error messages, act on errors etc. */ 1382 unit = STUNIT(dev); 1383 dsty = STDSTY(dev); 1384 st = device_lookup_private(&st_cd, unit); 1385 hold_blksize = st->blksize; 1386 hold_density = st->density; 1387 1388 switch ((u_int) cmd) { 1389 1390 case MTIOCGET: { 1391 struct mtget *g = (struct mtget *) arg; 1392 /* 1393 * (to get the current state of READONLY) 1394 */ 1395 error = st->ops(st, ST_OPS_MODESENSE, XS_CTL_SILENT); 1396 if (error) { 1397 /* 1398 * Ignore the error if in control mode; 1399 * this is mandated by st(4). 1400 */ 1401 if (STMODE(dev) != CTRL_MODE) 1402 break; 1403 error = 0; 1404 } 1405 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("[ioctl: get status]\n")); 1406 memset(g, 0, sizeof(struct mtget)); 1407 g->mt_type = 0x7; /* Ultrix compat *//*? */ 1408 g->mt_blksiz = st->blksize; 1409 g->mt_density = st->density; 1410 g->mt_mblksiz[0] = st->modes[0].blksize; 1411 g->mt_mblksiz[1] = st->modes[1].blksize; 1412 g->mt_mblksiz[2] = st->modes[2].blksize; 1413 g->mt_mblksiz[3] = st->modes[3].blksize; 1414 g->mt_mdensity[0] = st->modes[0].density; 1415 g->mt_mdensity[1] = st->modes[1].density; 1416 g->mt_mdensity[2] = st->modes[2].density; 1417 g->mt_mdensity[3] = st->modes[3].density; 1418 g->mt_fileno = st->fileno; 1419 g->mt_blkno = st->blkno; 1420 if (st->flags & ST_READONLY) 1421 g->mt_dsreg |= MT_DS_RDONLY; 1422 if (st->flags & ST_MOUNTED) 1423 g->mt_dsreg |= MT_DS_MOUNTED; 1424 g->mt_resid = st->mt_resid; 1425 g->mt_erreg = st->mt_erreg; 1426 /* 1427 * clear latched errors. 1428 */ 1429 st->mt_resid = 0; 1430 st->mt_erreg = 0; 1431 st->asc = 0; 1432 st->ascq = 0; 1433 break; 1434 } 1435 case MTIOCTOP: { 1436 1437 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1438 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1439 mt->mt_count)); 1440 1441 /* compat: in U*x it is a short */ 1442 number = mt->mt_count; 1443 switch ((short) (mt->mt_op)) { 1444 case MTWEOF: /* write an end-of-file record */ 1445 error = st_write_filemarks(st, number, flags); 1446 break; 1447 case MTBSF: /* backward space file */ 1448 number = -number; 1449 case MTFSF: /* forward space file */ 1450 error = st_check_eod(st, FALSE, &nmarks, flags); 1451 if (!error) 1452 error = st_space(st, number - nmarks, 1453 SP_FILEMARKS, flags); 1454 break; 1455 case MTBSR: /* backward space record */ 1456 number = -number; 1457 case MTFSR: /* forward space record */ 1458 error = st_check_eod(st, true, &nmarks, flags); 1459 if (!error) 1460 error = st_space(st, number, SP_BLKS, flags); 1461 break; 1462 case MTREW: /* rewind */ 1463 error = st_rewind(st, 0, flags); 1464 break; 1465 case MTOFFL: /* rewind and put the drive offline */ 1466 st_unmount(st, EJECT); 1467 break; 1468 case MTNOP: /* no operation, sets status only */ 1469 break; 1470 case MTRETEN: /* retension the tape */ 1471 error = st_load(st, LD_RETENSION, flags); 1472 if (!error) 1473 error = st_load(st, LD_LOAD, flags); 1474 break; 1475 case MTEOM: /* forward space to end of media */ 1476 error = st_check_eod(st, FALSE, &nmarks, flags); 1477 if (!error) 1478 error = st_space(st, 1, SP_EOM, flags); 1479 break; 1480 case MTCACHE: /* enable controller cache */ 1481 st->flags &= ~ST_DONTBUFFER; 1482 goto try_new_value; 1483 case MTNOCACHE: /* disable controller cache */ 1484 st->flags |= ST_DONTBUFFER; 1485 goto try_new_value; 1486 case MTERASE: /* erase volume */ 1487 error = st_erase(st, number, flags); 1488 break; 1489 case MTSETBSIZ: /* Set block size for device */ 1490 #ifdef NOTYET 1491 if (!(st->flags & ST_NEW_MOUNT)) { 1492 uprintf("re-mount tape before changing blocksize"); 1493 error = EINVAL; 1494 break; 1495 } 1496 #endif 1497 if (number == 0) 1498 st->flags &= ~ST_FIXEDBLOCKS; 1499 else { 1500 if ((st->blkmin || st->blkmax) && 1501 (number < st->blkmin || 1502 number > st->blkmax)) { 1503 error = EINVAL; 1504 break; 1505 } 1506 st->flags |= ST_FIXEDBLOCKS; 1507 } 1508 st->blksize = number; 1509 st->flags |= ST_BLOCK_SET; /*XXX */ 1510 goto try_new_value; 1511 1512 case MTSETDNSTY: /* Set density for device and mode */ 1513 /* 1514 * Any number >= 0 and <= 0xff is legal. Numbers 1515 * above 0x80 are 'vendor unique'. 1516 */ 1517 if (number < 0 || number > 255) { 1518 error = EINVAL; 1519 break; 1520 } else 1521 st->density = number; 1522 goto try_new_value; 1523 1524 case MTCMPRESS: 1525 error = st->ops(st, (number == 0) ? 1526 ST_OPS_CMPRSS_OFF : ST_OPS_CMPRSS_ON, 1527 XS_CTL_SILENT); 1528 break; 1529 1530 case MTEWARN: 1531 if (number) 1532 st->flags |= ST_EARLYWARN; 1533 else 1534 st->flags &= ~ST_EARLYWARN; 1535 break; 1536 1537 default: 1538 error = EINVAL; 1539 } 1540 break; 1541 } 1542 case MTIOCIEOT: 1543 case MTIOCEEOT: 1544 break; 1545 1546 case MTIOCRDSPOS: 1547 error = st_rdpos(st, 0, (u_int32_t *) arg); 1548 break; 1549 1550 case MTIOCRDHPOS: 1551 error = st_rdpos(st, 1, (u_int32_t *) arg); 1552 break; 1553 1554 case MTIOCSLOCATE: 1555 error = st_setpos(st, 0, (u_int32_t *) arg); 1556 break; 1557 1558 case MTIOCHLOCATE: 1559 error = st_setpos(st, 1, (u_int32_t *) arg); 1560 break; 1561 1562 1563 default: 1564 error = scsipi_do_ioctl(st->sc_periph, dev, cmd, arg, 1565 flag, l); 1566 break; 1567 } 1568 return (error); 1569 /*-----------------------------*/ 1570 try_new_value: 1571 /* 1572 * Check that the mode being asked for is aggreeable to the 1573 * drive. If not, put it back the way it was. 1574 * 1575 * If in control mode, we can make (persistent) mode changes 1576 * even if no medium is loaded (see st(4)). 1577 */ 1578 if ((STMODE(dev) != CTRL_MODE || (st->flags & ST_MOUNTED) != 0) && 1579 (error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 1580 /* put it back as it was */ 1581 aprint_error_dev(&st->sc_dev, "cannot set selected mode\n"); 1582 st->density = hold_density; 1583 st->blksize = hold_blksize; 1584 if (st->blksize) 1585 st->flags |= ST_FIXEDBLOCKS; 1586 else 1587 st->flags &= ~ST_FIXEDBLOCKS; 1588 return (error); 1589 } 1590 /* 1591 * As the drive liked it, if we are setting a new default, 1592 * set it into the structures as such. 1593 * 1594 * The means for deciding this are not finalised yet- but 1595 * if the device was opened in Control Mode, the values 1596 * are persistent now across mounts. 1597 */ 1598 if (STMODE(dev) == CTRL_MODE) { 1599 switch ((short) (mt->mt_op)) { 1600 case MTSETBSIZ: 1601 st->modes[dsty].blksize = st->blksize; 1602 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1603 break; 1604 case MTSETDNSTY: 1605 st->modes[dsty].density = st->density; 1606 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1607 break; 1608 } 1609 } 1610 return (0); 1611 } 1612 1613 /* 1614 * Do a synchronous read. 1615 */ 1616 static int 1617 st_read(struct st_softc *st, char *bf, int size, int flags) 1618 { 1619 struct scsi_rw_tape cmd; 1620 1621 /* 1622 * If it's a null transfer, return immediatly 1623 */ 1624 if (size == 0) 1625 return (0); 1626 memset(&cmd, 0, sizeof(cmd)); 1627 cmd.opcode = READ; 1628 if (st->flags & ST_FIXEDBLOCKS) { 1629 cmd.byte2 |= SRW_FIXED; 1630 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1631 cmd.len); 1632 } else 1633 _lto3b(size, cmd.len); 1634 return (scsipi_command(st->sc_periph, 1635 (void *)&cmd, sizeof(cmd), (void *)bf, size, 0, ST_IO_TIME, NULL, 1636 flags | XS_CTL_DATA_IN)); 1637 } 1638 1639 /* 1640 * issue an erase command 1641 */ 1642 static int 1643 st_erase(struct st_softc *st, int full, int flags) 1644 { 1645 int tmo; 1646 struct scsi_erase cmd; 1647 1648 /* 1649 * Full erase means set LONG bit in erase command, which asks 1650 * the drive to erase the entire unit. Without this bit, we're 1651 * asking the drive to write an erase gap. 1652 */ 1653 memset(&cmd, 0, sizeof(cmd)); 1654 cmd.opcode = ERASE; 1655 if (full) { 1656 cmd.byte2 = SE_LONG; 1657 tmo = ST_SPC_TIME; 1658 } else { 1659 tmo = ST_IO_TIME; 1660 } 1661 1662 /* 1663 * XXX We always do this asynchronously, for now, unless the device 1664 * has the ST_Q_ERASE_NOIMM quirk. How long should we wait if we 1665 * want to (eventually) to it synchronously? 1666 */ 1667 if ((st->quirks & ST_Q_ERASE_NOIMM) == 0) 1668 cmd.byte2 |= SE_IMMED; 1669 1670 return (scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1671 ST_RETRIES, tmo, NULL, flags)); 1672 } 1673 1674 /* 1675 * skip N blocks/filemarks/seq filemarks/eom 1676 */ 1677 static int 1678 st_space(struct st_softc *st, int number, u_int what, int flags) 1679 { 1680 struct scsi_space cmd; 1681 int error; 1682 1683 switch (what) { 1684 case SP_BLKS: 1685 if (st->flags & ST_PER_ACTION) { 1686 if (number > 0) { 1687 st->flags &= ~ST_PER_ACTION; 1688 return (EIO); 1689 } else if (number < 0) { 1690 if (st->flags & ST_AT_FILEMARK) { 1691 /* 1692 * Handling of ST_AT_FILEMARK 1693 * in st_space will fill in the 1694 * right file mark count. 1695 */ 1696 error = st_space(st, 0, SP_FILEMARKS, 1697 flags); 1698 if (error) 1699 return (error); 1700 } 1701 if (st->flags & ST_BLANK_READ) { 1702 st->flags &= ~ST_BLANK_READ; 1703 return (EIO); 1704 } 1705 st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); 1706 } 1707 } 1708 break; 1709 case SP_FILEMARKS: 1710 if (st->flags & ST_EIO_PENDING) { 1711 if (number > 0) { 1712 /* pretend we just discovered the error */ 1713 st->flags &= ~ST_EIO_PENDING; 1714 return (EIO); 1715 } else if (number < 0) { 1716 /* back away from the error */ 1717 st->flags &= ~ST_EIO_PENDING; 1718 } 1719 } 1720 if (st->flags & ST_AT_FILEMARK) { 1721 st->flags &= ~ST_AT_FILEMARK; 1722 number--; 1723 } 1724 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 1725 /* back away from unwritten tape */ 1726 st->flags &= ~ST_BLANK_READ; 1727 number++; /* XXX dubious */ 1728 } 1729 break; 1730 case SP_EOM: 1731 if (st->flags & ST_EOM_PENDING) { 1732 /* we're already there */ 1733 st->flags &= ~ST_EOM_PENDING; 1734 return (0); 1735 } 1736 if (st->flags & ST_EIO_PENDING) { 1737 /* pretend we just discovered the error */ 1738 st->flags &= ~ST_EIO_PENDING; 1739 return (EIO); 1740 } 1741 if (st->flags & ST_AT_FILEMARK) 1742 st->flags &= ~ST_AT_FILEMARK; 1743 break; 1744 } 1745 if (number == 0) 1746 return (0); 1747 1748 memset(&cmd, 0, sizeof(cmd)); 1749 cmd.opcode = SPACE; 1750 cmd.byte2 = what; 1751 _lto3b(number, cmd.number); 1752 1753 st->flags &= ~ST_POSUPDATED; 1754 st->last_ctl_resid = 0; 1755 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1756 0, ST_SPC_TIME, NULL, flags); 1757 1758 if (error == 0 && (st->flags & ST_POSUPDATED) == 0) { 1759 number = number - st->last_ctl_resid; 1760 if (what == SP_BLKS) { 1761 if (st->blkno != -1) { 1762 st->blkno += number; 1763 } 1764 } else if (what == SP_FILEMARKS) { 1765 if (st->fileno != -1) { 1766 st->fileno += number; 1767 if (number > 0) { 1768 st->blkno = 0; 1769 } else if (number < 0) { 1770 st->blkno = -1; 1771 } 1772 } 1773 } else if (what == SP_EOM) { 1774 /* 1775 * This loses us relative position. 1776 */ 1777 st->fileno = st->blkno = -1; 1778 } 1779 } 1780 return (error); 1781 } 1782 1783 /* 1784 * write N filemarks 1785 */ 1786 static int 1787 st_write_filemarks(struct st_softc *st, int number, int flags) 1788 { 1789 int error; 1790 struct scsi_write_filemarks cmd; 1791 1792 /* 1793 * It's hard to write a negative number of file marks. 1794 * Don't try. 1795 */ 1796 if (number < 0) 1797 return (EINVAL); 1798 switch (number) { 1799 case 0: /* really a command to sync the drive's buffers */ 1800 break; 1801 case 1: 1802 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 1803 st->flags &= ~ST_WRITTEN; 1804 else 1805 st->flags |= ST_FM_WRITTEN; 1806 st->flags &= ~ST_PER_ACTION; 1807 break; 1808 default: 1809 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 1810 } 1811 1812 memset(&cmd, 0, sizeof(cmd)); 1813 cmd.opcode = WRITE_FILEMARKS; 1814 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1815 cmd.byte2 = SR_IMMED; 1816 /* 1817 * The ATAPI Onstream DI-30 doesn't support writing filemarks, but 1818 * WRITE_FILEMARKS is still used to flush the buffer 1819 */ 1820 if ((st->quirks & ST_Q_NOFILEMARKS) == 0) 1821 _lto3b(number, cmd.number); 1822 1823 /* XXX WE NEED TO BE ABLE TO GET A RESIDIUAL XXX */ 1824 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1825 0, ST_IO_TIME * 4, NULL, flags); 1826 if (error == 0 && st->fileno != -1) { 1827 st->fileno += number; 1828 } 1829 return (error); 1830 } 1831 1832 /* 1833 * Make sure the right number of file marks is on tape if the 1834 * tape has been written. If the position argument is true, 1835 * leave the tape positioned where it was originally. 1836 * 1837 * nmarks returns the number of marks to skip (or, if position 1838 * true, which were skipped) to get back original position. 1839 */ 1840 static int 1841 st_check_eod(struct st_softc *st, boolean position, int *nmarks, int flags) 1842 { 1843 int error; 1844 1845 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 1846 default: 1847 *nmarks = 0; 1848 return (0); 1849 case ST_WRITTEN: 1850 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 1851 *nmarks = 1; 1852 break; 1853 case ST_WRITTEN | ST_2FM_AT_EOD: 1854 *nmarks = 2; 1855 } 1856 error = st_write_filemarks(st, *nmarks, flags); 1857 if (position && !error) 1858 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 1859 return (error); 1860 } 1861 1862 /* 1863 * load/unload/retension 1864 */ 1865 static int 1866 st_load(struct st_softc *st, u_int type, int flags) 1867 { 1868 int error; 1869 struct scsi_load cmd; 1870 1871 if (type != LD_LOAD) { 1872 int nmarks; 1873 1874 error = st_check_eod(st, FALSE, &nmarks, flags); 1875 if (error) { 1876 aprint_error_dev(&st->sc_dev, "failed to write closing filemarks at " 1877 "unload, errno=%d\n", error); 1878 return (error); 1879 } 1880 } 1881 if (st->quirks & ST_Q_IGNORE_LOADS) { 1882 if (type == LD_LOAD) { 1883 /* 1884 * If we ignore loads, at least we should try a rewind. 1885 */ 1886 return st_rewind(st, 0, flags); 1887 } 1888 /* otherwise, we should do what's asked of us */ 1889 } 1890 1891 memset(&cmd, 0, sizeof(cmd)); 1892 cmd.opcode = LOAD; 1893 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1894 cmd.byte2 = SR_IMMED; 1895 cmd.how = type; 1896 1897 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1898 ST_RETRIES, ST_SPC_TIME, NULL, flags); 1899 if (error) { 1900 aprint_error_dev(&st->sc_dev, "error %d in st_load (op %d)\n", 1901 error, type); 1902 } 1903 return (error); 1904 } 1905 1906 /* 1907 * Rewind the device 1908 */ 1909 static int 1910 st_rewind(struct st_softc *st, u_int immediate, int flags) 1911 { 1912 struct scsi_rewind cmd; 1913 int error; 1914 int nmarks; 1915 int timeout; 1916 1917 error = st_check_eod(st, FALSE, &nmarks, flags); 1918 if (error) { 1919 aprint_error_dev(&st->sc_dev, "failed to write closing filemarks at " 1920 "rewind, errno=%d\n", error); 1921 return (error); 1922 } 1923 st->flags &= ~ST_PER_ACTION; 1924 1925 /* If requestor asked for immediate response, set a short timeout */ 1926 timeout = immediate ? ST_CTL_TIME : ST_SPC_TIME; 1927 1928 /* 1929 * ATAPI tapes always need immediate to be set 1930 */ 1931 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1932 immediate = SR_IMMED; 1933 1934 memset(&cmd, 0, sizeof(cmd)); 1935 cmd.opcode = REWIND; 1936 cmd.byte2 = immediate; 1937 1938 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1939 ST_RETRIES, timeout, NULL, flags); 1940 if (error) { 1941 aprint_error_dev(&st->sc_dev, "error %d trying to rewind\n", 1942 error); 1943 /* lost position */ 1944 st->fileno = st->blkno = -1; 1945 } else { 1946 st->fileno = st->blkno = 0; 1947 } 1948 return (error); 1949 } 1950 1951 static int 1952 st_rdpos(struct st_softc *st, int hard, u_int32_t *blkptr) 1953 { 1954 int error; 1955 u_int8_t posdata[20]; 1956 struct scsi_tape_read_position cmd; 1957 1958 /* 1959 * We try and flush any buffered writes here if we were writing 1960 * and we're trying to get hardware block position. It eats 1961 * up performance substantially, but I'm wary of drive firmware. 1962 * 1963 * I think that *logical* block position is probably okay- 1964 * but hardware block position might have to wait for data 1965 * to hit media to be valid. Caveat Emptor. 1966 */ 1967 1968 if (hard && (st->flags & ST_WRITTEN)) { 1969 /* 1970 * First flush any pending writes... 1971 */ 1972 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 1973 /* 1974 * The latter case is for 'write protected' tapes 1975 * which are too stupid to recognize a zero count 1976 * for writing filemarks as a no-op. 1977 */ 1978 if (error != 0 && error != EACCES && error != EROFS) 1979 return (error); 1980 } 1981 1982 memset(&cmd, 0, sizeof(cmd)); 1983 memset(&posdata, 0, sizeof(posdata)); 1984 cmd.opcode = READ_POSITION; 1985 if (hard) 1986 cmd.byte1 = 1; 1987 1988 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 1989 (void *)&posdata, sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, 1990 XS_CTL_SILENT | XS_CTL_DATA_IN); 1991 1992 if (error == 0) { 1993 #if 0 1994 printf("posdata:"); 1995 for (hard = 0; hard < sizeof(posdata); hard++) 1996 printf("%02x ", posdata[hard] & 0xff); 1997 printf("\n"); 1998 #endif 1999 if (posdata[0] & 0x4) /* Block Position Unknown */ 2000 error = EINVAL; 2001 else 2002 *blkptr = _4btol(&posdata[4]); 2003 } 2004 return (error); 2005 } 2006 2007 static int 2008 st_setpos(struct st_softc *st, int hard, u_int32_t *blkptr) 2009 { 2010 int error; 2011 struct scsi_tape_locate cmd; 2012 2013 /* 2014 * We used to try and flush any buffered writes here. 2015 * Now we push this onto user applications to either 2016 * flush the pending writes themselves (via a zero count 2017 * WRITE FILEMARKS command) or they can trust their tape 2018 * drive to do this correctly for them. 2019 * 2020 * There are very ugly performance limitations otherwise. 2021 */ 2022 2023 memset(&cmd, 0, sizeof(cmd)); 2024 cmd.opcode = LOCATE; 2025 if (hard) 2026 cmd.byte2 = 1 << 2; 2027 _lto4b(*blkptr, cmd.blkaddr); 2028 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 2029 ST_RETRIES, ST_SPC_TIME, NULL, 0); 2030 /* 2031 * Note file && block number position now unknown (if 2032 * these things ever start being maintained in this driver) 2033 */ 2034 st->fileno = st->blkno = -1; 2035 return (error); 2036 } 2037 2038 2039 /* 2040 * Look at the returned sense and act on the error and determine 2041 * the unix error number to pass back..., 0 (== report no error), 2042 * -1 = retry the operation, -2 continue error processing. 2043 */ 2044 static int 2045 st_interpret_sense(struct scsipi_xfer *xs) 2046 { 2047 struct scsipi_periph *periph = xs->xs_periph; 2048 struct scsi_sense_data *sense = &xs->sense.scsi_sense; 2049 struct buf *bp = xs->bp; 2050 struct st_softc *st = (void *)periph->periph_dev; 2051 int retval = EJUSTRETURN; 2052 int doprint = ((xs->xs_control & XS_CTL_SILENT) == 0); 2053 u_int8_t key; 2054 int32_t info; 2055 2056 /* 2057 * If it isn't a extended or extended/deferred error, let 2058 * the generic code handle it. 2059 */ 2060 if (SSD_RCODE(sense->response_code) != SSD_RCODE_CURRENT && 2061 SSD_RCODE(sense->response_code) != SSD_RCODE_DEFERRED) 2062 return (retval); 2063 2064 if (sense->response_code & SSD_RCODE_VALID) 2065 info = _4btol(sense->info); 2066 else 2067 info = (st->flags & ST_FIXEDBLOCKS) ? 2068 xs->datalen / st->blksize : xs->datalen; 2069 key = SSD_SENSE_KEY(sense->flags); 2070 st->mt_erreg = key; 2071 st->asc = sense->asc; 2072 st->ascq = sense->ascq; 2073 st->mt_resid = (short) info; 2074 2075 if (key == SKEY_NOT_READY && st->asc == 0x4 && st->ascq == 0x1) { 2076 /* Not Ready, Logical Unit Is in Process Of Becoming Ready */ 2077 if (!callout_pending(&periph->periph_callout)) 2078 scsipi_periph_freeze(periph, 1); 2079 callout_reset(&periph->periph_callout, 2080 hz, scsipi_periph_timed_thaw, periph); 2081 return (ERESTART); 2082 } 2083 2084 /* 2085 * If the device is not open yet, let generic handle 2086 */ 2087 if ((periph->periph_flags & PERIPH_OPEN) == 0) { 2088 return (retval); 2089 } 2090 2091 xs->resid = info; 2092 if (st->flags & ST_FIXEDBLOCKS) { 2093 if (bp) { 2094 xs->resid *= st->blksize; 2095 st->last_io_resid = xs->resid; 2096 } else { 2097 st->last_ctl_resid = xs->resid; 2098 } 2099 if (key == SKEY_VOLUME_OVERFLOW) { 2100 st->flags |= ST_EIO_PENDING; 2101 if (bp) 2102 bp->b_resid = xs->resid; 2103 } else if (sense->flags & SSD_EOM) { 2104 if ((st->flags & ST_EARLYWARN) == 0) 2105 st->flags |= ST_EIO_PENDING; 2106 st->flags |= ST_EOM_PENDING; 2107 if (bp) { 2108 #if 0 2109 bp->b_resid = xs->resid; 2110 #else 2111 /* 2112 * Grotesque as it seems, the few times 2113 * I've actually seen a non-zero resid, 2114 * the tape drive actually lied and had 2115 * written all the data! 2116 */ 2117 bp->b_resid = 0; 2118 #endif 2119 } 2120 } 2121 if (sense->flags & SSD_FILEMARK) { 2122 st->flags |= ST_AT_FILEMARK; 2123 if (bp) 2124 bp->b_resid = xs->resid; 2125 if (st->fileno != (daddr_t) -1) { 2126 st->fileno++; 2127 st->blkno = 0; 2128 st->flags |= ST_POSUPDATED; 2129 } 2130 } 2131 if (sense->flags & SSD_ILI) { 2132 st->flags |= ST_EIO_PENDING; 2133 if (bp) 2134 bp->b_resid = xs->resid; 2135 if (sense->response_code & SSD_RCODE_VALID && 2136 (xs->xs_control & XS_CTL_SILENT) == 0) 2137 aprint_error_dev(&st->sc_dev, "block wrong size, %d blocks " 2138 "residual\n", info); 2139 2140 /* 2141 * This quirk code helps the drive read 2142 * the first tape block, regardless of 2143 * format. That is required for these 2144 * drives to return proper MODE SENSE 2145 * information. 2146 */ 2147 if ((st->quirks & ST_Q_SENSE_HELP) && 2148 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 2149 st->blksize -= 512; 2150 else if ((st->flags & ST_POSUPDATED) == 0) { 2151 if (st->blkno != (daddr_t) -1) { 2152 st->blkno += 2153 (xs->datalen / st->blksize); 2154 st->flags |= ST_POSUPDATED; 2155 } 2156 } 2157 } 2158 /* 2159 * If data wanted and no data was transferred, do it immediately 2160 */ 2161 if (xs->datalen && xs->resid >= xs->datalen) { 2162 if (st->flags & ST_EIO_PENDING) 2163 return (EIO); 2164 if (st->flags & ST_AT_FILEMARK) { 2165 if (bp) 2166 bp->b_resid = xs->resid; 2167 return (0); 2168 } 2169 } 2170 } else { /* must be variable mode */ 2171 if (bp) { 2172 st->last_io_resid = xs->resid; 2173 } else { 2174 st->last_ctl_resid = xs->resid; 2175 } 2176 if (sense->flags & SSD_EOM) { 2177 /* 2178 * The current semantics of this 2179 * driver requires EOM detection 2180 * to return EIO unless early 2181 * warning detection is enabled 2182 * for variable mode (this is always 2183 * on for fixed block mode). 2184 */ 2185 if (st->flags & ST_EARLYWARN) { 2186 st->flags |= ST_EOM_PENDING; 2187 retval = 0; 2188 } else { 2189 retval = EIO; 2190 /* 2191 * If we return an error we can't claim to 2192 * have transfered all data. 2193 */ 2194 if (xs->resid == 0) 2195 xs->resid = xs->datalen; 2196 } 2197 2198 /* 2199 * If it's an unadorned EOM detection, 2200 * suppress printing an error. 2201 */ 2202 if (key == SKEY_NO_SENSE) { 2203 doprint = 0; 2204 } 2205 } else if (sense->flags & SSD_FILEMARK) { 2206 retval = 0; 2207 if (st->fileno != (daddr_t) -1) { 2208 st->fileno++; 2209 st->blkno = 0; 2210 st->flags |= ST_POSUPDATED; 2211 } 2212 } else if (sense->flags & SSD_ILI) { 2213 if (info < 0) { 2214 /* 2215 * The tape record was bigger than the read 2216 * we issued. 2217 */ 2218 if ((xs->xs_control & XS_CTL_SILENT) == 0) { 2219 aprint_error_dev(&st->sc_dev, 2220 "%d-byte tape record too big" 2221 " for %d-byte user buffer\n", 2222 xs->datalen - info, xs->datalen); 2223 } 2224 retval = EIO; 2225 } else { 2226 retval = 0; 2227 if (st->blkno != (daddr_t) -1) { 2228 st->blkno++; 2229 st->flags |= ST_POSUPDATED; 2230 } 2231 } 2232 } 2233 if (bp) 2234 bp->b_resid = xs->resid; 2235 } 2236 2237 #ifndef SCSIPI_DEBUG 2238 if (retval == 0 && key == SKEY_NO_SENSE) 2239 doprint = 0; 2240 #endif 2241 if (key == SKEY_BLANK_CHECK) { 2242 /* 2243 * This quirk code helps the drive read the 2244 * first tape block, regardless of format. That 2245 * is required for these drives to return proper 2246 * MODE SENSE information. 2247 */ 2248 if ((st->quirks & ST_Q_SENSE_HELP) && 2249 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 2250 /* still starting */ 2251 st->blksize -= 512; 2252 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 2253 st->flags |= ST_BLANK_READ; 2254 xs->resid = xs->datalen; 2255 if (bp) { 2256 bp->b_resid = xs->resid; 2257 /* return an EOF */ 2258 } 2259 retval = 0; 2260 /* lost position */ 2261 st->fileno = st->blkno = -1; 2262 } 2263 } 2264 2265 /* 2266 * If generic sense processing will continue, we should not 2267 * print sense info here. 2268 */ 2269 if (retval == EJUSTRETURN) 2270 doprint = 0; 2271 2272 if (doprint) { 2273 2274 /* Print verbose sense info if possible */ 2275 if (scsipi_print_sense(xs, 0) != 0) 2276 return (retval); 2277 2278 /* Print less-verbose sense info */ 2279 scsipi_printaddr(periph); 2280 printf("Sense Key 0x%02x", key); 2281 if ((sense->response_code & SSD_RCODE_VALID) != 0) { 2282 switch (key) { 2283 case SKEY_NOT_READY: 2284 case SKEY_ILLEGAL_REQUEST: 2285 case SKEY_UNIT_ATTENTION: 2286 case SKEY_DATA_PROTECT: 2287 break; 2288 case SKEY_VOLUME_OVERFLOW: 2289 case SKEY_BLANK_CHECK: 2290 printf(", requested size: %d (decimal)", info); 2291 break; 2292 case SKEY_ABORTED_COMMAND: 2293 if (xs->xs_retries) 2294 printf(", retrying"); 2295 printf(", cmd 0x%x, info 0x%x", 2296 xs->cmd->opcode, info); 2297 break; 2298 default: 2299 printf(", info = %d (decimal)", info); 2300 } 2301 } 2302 if (sense->extra_len != 0) { 2303 int n; 2304 printf(", data ="); 2305 for (n = 0; n < sense->extra_len; n++) 2306 printf(" %02x", sense->csi[n]); 2307 } 2308 printf("\n"); 2309 } 2310 return (retval); 2311 } 2312 2313 /* 2314 * The quirk here is that the drive returns some value to st_mode_sense 2315 * incorrectly until the tape has actually passed by the head. 2316 * 2317 * The method is to set the drive to large fixed-block state (user-specified 2318 * density and 1024-byte blocks), then read and rewind to get it to sense the 2319 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 2320 * work, as a last resort, try variable- length blocks. The result will be 2321 * the ability to do an accurate st_mode_sense. 2322 * 2323 * We know we can do a rewind because we just did a load, which implies rewind. 2324 * Rewind seems preferable to space backward if we have a virgin tape. 2325 * 2326 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 2327 * error processing, both part of st_interpret_sense. 2328 */ 2329 static int 2330 st_touch_tape(struct st_softc *st) 2331 { 2332 char *bf; 2333 int readsize; 2334 int error; 2335 2336 bf = malloc(1024, M_TEMP, M_NOWAIT); 2337 if (bf == NULL) 2338 return (ENOMEM); 2339 2340 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 2341 goto bad; 2342 2343 /* 2344 * If the block size is already known from the 2345 * sense data, use it. Else start probing at 1024. 2346 */ 2347 if (st->media_blksize > 0) 2348 st->blksize = st->media_blksize; 2349 else 2350 st->blksize = 1024; 2351 2352 do { 2353 switch (st->blksize) { 2354 case 512: 2355 case 1024: 2356 readsize = st->blksize; 2357 st->flags |= ST_FIXEDBLOCKS; 2358 break; 2359 default: 2360 readsize = 1; 2361 st->flags &= ~ST_FIXEDBLOCKS; 2362 } 2363 if ((error = st->ops(st, ST_OPS_MODESELECT, XS_CTL_SILENT)) 2364 != 0) { 2365 /* 2366 * The device did not agree with the proposed 2367 * block size. If we exhausted our options, 2368 * return failure, else try another. 2369 */ 2370 if (readsize == 1) 2371 goto bad; 2372 st->blksize -= 512; 2373 continue; 2374 } 2375 st_read(st, bf, readsize, XS_CTL_SILENT); /* XXX */ 2376 if ((error = st_rewind(st, 0, 0)) != 0) { 2377 bad: free(bf, M_TEMP); 2378 return (error); 2379 } 2380 } while (readsize != 1 && readsize > st->blksize); 2381 2382 free(bf, M_TEMP); 2383 return (0); 2384 } 2385 2386 static int 2387 stdump(dev_t dev, daddr_t blkno, void *va, 2388 size_t size) 2389 { 2390 2391 /* Not implemented. */ 2392 return (ENXIO); 2393 } 2394 2395 /* 2396 * Send a filled out parameter structure to the drive to 2397 * set it into the desire modes etc. 2398 */ 2399 int 2400 st_mode_select(struct st_softc *st, int flags) 2401 { 2402 u_int select_len; 2403 struct select { 2404 struct scsi_mode_parameter_header_6 header; 2405 struct scsi_general_block_descriptor blk_desc; 2406 u_char sense_data[MAX_PAGE_0_SIZE]; 2407 } select; 2408 struct scsipi_periph *periph = st->sc_periph; 2409 2410 select_len = sizeof(select.header) + sizeof(select.blk_desc) + 2411 st->page_0_size; 2412 2413 /* 2414 * This quirk deals with drives that have only one valid mode 2415 * and think this gives them license to reject all mode selects, 2416 * even if the selected mode is the one that is supported. 2417 */ 2418 if (st->quirks & ST_Q_UNIMODAL) { 2419 SC_DEBUG(periph, SCSIPI_DB3, 2420 ("not setting density 0x%x blksize 0x%x\n", 2421 st->density, st->blksize)); 2422 return (0); 2423 } 2424 2425 /* 2426 * Set up for a mode select 2427 */ 2428 memset(&select, 0, sizeof(select)); 2429 select.header.blk_desc_len = sizeof(struct scsi_general_block_descriptor); 2430 select.header.dev_spec &= ~SMH_DSP_BUFF_MODE; 2431 select.blk_desc.density = st->density; 2432 if (st->flags & ST_DONTBUFFER) 2433 select.header.dev_spec |= SMH_DSP_BUFF_MODE_OFF; 2434 else 2435 select.header.dev_spec |= SMH_DSP_BUFF_MODE_ON; 2436 if (st->flags & ST_FIXEDBLOCKS) 2437 _lto3b(st->blksize, select.blk_desc.blklen); 2438 if (st->page_0_size) 2439 memcpy(select.sense_data, st->sense_data, st->page_0_size); 2440 2441 /* 2442 * do the command 2443 */ 2444 return scsipi_mode_select(periph, 0, &select.header, select_len, 2445 flags, ST_RETRIES, ST_CTL_TIME); 2446 } 2447
Indexes created Mon Sep 22 13:09:51 GMT 2025