st.c revision 1.202.18.2
1 /* $NetBSD: st.c,v 1.202.18.2 2008/06/02 13:23:51 mjf 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 1.202.18.2 2008/06/02 13:23:51 mjf Exp $"); 54 55 #include "opt_scsi.h" 56 57 #include <sys/param.h> 58 #include <sys/systm.h> 59 #include <sys/fcntl.h> 60 #include <sys/errno.h> 61 #include <sys/ioctl.h> 62 #include <sys/malloc.h> 63 #include <sys/buf.h> 64 #include <sys/bufq.h> 65 #include <sys/proc.h> 66 #include <sys/user.h> 67 #include <sys/mtio.h> 68 #include <sys/device.h> 69 #include <sys/conf.h> 70 #include <sys/kernel.h> 71 #include <sys/vnode.h> 72 #include <sys/iostat.h> 73 #include <sys/sysctl.h> 74 75 #include <dev/scsipi/scsi_spc.h> 76 #include <dev/scsipi/scsipi_all.h> 77 #include <dev/scsipi/scsi_all.h> 78 #include <dev/scsipi/scsi_tape.h> 79 #include <dev/scsipi/scsipiconf.h> 80 #include <dev/scsipi/scsipi_base.h> 81 #include <dev/scsipi/stvar.h> 82 83 /* Defines for device specific stuff */ 84 #define DEF_FIXED_BSIZE 512 85 86 #define STMODE(z) ( minor(z) & 0x03) 87 #define STDSTY(z) ((minor(z) >> 2) & 0x03) 88 #define STUNIT(z) ((minor(z) >> 4) ) 89 #define STNMINOR 16 90 91 #define NORMAL_MODE 0 92 #define NOREW_MODE 1 93 #define EJECT_MODE 2 94 #define CTRL_MODE 3 95 96 #ifndef ST_MOUNT_DELAY 97 #define ST_MOUNT_DELAY 0 98 #endif 99 100 static dev_type_open(stopen); 101 static dev_type_close(stclose); 102 static dev_type_read(stread); 103 static dev_type_write(stwrite); 104 static dev_type_ioctl(stioctl); 105 static dev_type_strategy(ststrategy); 106 static dev_type_dump(stdump); 107 108 const struct bdevsw st_bdevsw = { 109 stopen, stclose, ststrategy, stioctl, stdump, nosize, D_TAPE 110 }; 111 112 const struct cdevsw st_cdevsw = { 113 stopen, stclose, stread, stwrite, stioctl, 114 nostop, notty, nopoll, nommap, nokqfilter, D_TAPE 115 }; 116 117 /* 118 * Define various devices that we know mis-behave in some way, 119 * and note how they are bad, so we can correct for them 120 */ 121 122 static const struct st_quirk_inquiry_pattern st_quirk_patterns[] = { 123 {{T_SEQUENTIAL, T_REMOV, 124 " ", " ", " "}, {0, 0, { 125 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 126 {ST_Q_FORCE_BLKSIZE, 512, QIC_24}, /* minor 4-7 */ 127 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_1600}, /* minor 8-11 */ 128 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_6250} /* minor 12-15 */ 129 }}}, 130 {{T_SEQUENTIAL, T_REMOV, 131 "TANDBERG", " TDC 3600 ", ""}, {0, 12, { 132 {0, 0, 0}, /* minor 0-3 */ 133 {ST_Q_FORCE_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 134 {0, 0, QIC_150}, /* minor 8-11 */ 135 {0, 0, QIC_120} /* minor 12-15 */ 136 }}}, 137 {{T_SEQUENTIAL, T_REMOV, 138 "TANDBERG", " TDC 3800 ", ""}, {0, 0, { 139 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 140 {0, 0, QIC_525}, /* minor 4-7 */ 141 {0, 0, QIC_150}, /* minor 8-11 */ 142 {0, 0, QIC_120} /* minor 12-15 */ 143 }}}, 144 {{T_SEQUENTIAL, T_REMOV, 145 "TANDBERG", " SLR5 4/8GB ", ""}, {0, 0, { 146 {ST_Q_FORCE_BLKSIZE, 1024, 0}, /* minor 0-3 */ 147 {0, 0, 0}, /* minor 4-7 */ 148 {0, 0, 0}, /* minor 8-11 */ 149 {0, 0, 0} /* minor 12-15 */ 150 }}}, 151 /* 152 * lacking a manual for the 4200, it's not clear what the 153 * specific density codes should be- the device is a 2.5GB 154 * capable QIC drive, those density codes aren't readily 155 * availabel. The 'default' will just have to do. 156 */ 157 {{T_SEQUENTIAL, T_REMOV, 158 "TANDBERG", " TDC 4200 ", ""}, {0, 0, { 159 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 160 {0, 0, QIC_525}, /* minor 4-7 */ 161 {0, 0, QIC_150}, /* minor 8-11 */ 162 {0, 0, QIC_120} /* minor 12-15 */ 163 }}}, 164 /* 165 * At least -005 and -007 need this. I'll assume they all do unless I 166 * hear otherwise. - mycroft, 31MAR1994 167 */ 168 {{T_SEQUENTIAL, T_REMOV, 169 "ARCHIVE ", "VIPER 2525 25462", ""}, {0, 0, { 170 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 171 {ST_Q_SENSE_HELP, 0, QIC_525}, /* minor 4-7 */ 172 {0, 0, QIC_150}, /* minor 8-11 */ 173 {0, 0, QIC_120} /* minor 12-15 */ 174 }}}, 175 /* 176 * One user reports that this works for his tape drive. It probably 177 * needs more work. - mycroft, 09APR1994 178 */ 179 {{T_SEQUENTIAL, T_REMOV, 180 "SANKYO ", "CP525 ", ""}, {0, 0, { 181 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 182 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 183 {0, 0, QIC_150}, /* minor 8-11 */ 184 {0, 0, QIC_120} /* minor 12-15 */ 185 }}}, 186 {{T_SEQUENTIAL, T_REMOV, 187 "ANRITSU ", "DMT780 ", ""}, {0, 0, { 188 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 189 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 190 {0, 0, QIC_150}, /* minor 8-11 */ 191 {0, 0, QIC_120} /* minor 12-15 */ 192 }}}, 193 {{T_SEQUENTIAL, T_REMOV, 194 "ARCHIVE ", "VIPER 150 21247", ""}, {ST_Q_ERASE_NOIMM, 12, { 195 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 196 {0, 0, QIC_150}, /* minor 4-7 */ 197 {0, 0, QIC_120}, /* minor 8-11 */ 198 {0, 0, QIC_24} /* minor 12-15 */ 199 }}}, 200 {{T_SEQUENTIAL, T_REMOV, 201 "ARCHIVE ", "VIPER 150 21531", ""}, {ST_Q_ERASE_NOIMM, 12, { 202 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 203 {0, 0, QIC_150}, /* minor 4-7 */ 204 {0, 0, QIC_120}, /* minor 8-11 */ 205 {0, 0, QIC_24} /* minor 12-15 */ 206 }}}, 207 {{T_SEQUENTIAL, T_REMOV, 208 "WANGTEK ", "5099ES SCSI", ""}, {0, 0, { 209 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 210 {0, 0, QIC_11}, /* minor 4-7 */ 211 {0, 0, QIC_24}, /* minor 8-11 */ 212 {0, 0, QIC_24} /* minor 12-15 */ 213 }}}, 214 {{T_SEQUENTIAL, T_REMOV, 215 "WANGTEK ", "5150ES SCSI", ""}, {0, 0, { 216 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 217 {0, 0, QIC_24}, /* minor 4-7 */ 218 {0, 0, QIC_120}, /* minor 8-11 */ 219 {0, 0, QIC_150} /* minor 12-15 */ 220 }}}, 221 {{T_SEQUENTIAL, T_REMOV, 222 "WANGTEK ", "5525ES SCSI REV7", ""}, {0, 0, { 223 {0, 0, 0}, /* minor 0-3 */ 224 {ST_Q_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 225 {0, 0, QIC_150}, /* minor 8-11 */ 226 {0, 0, QIC_120} /* minor 12-15 */ 227 }}}, 228 {{T_SEQUENTIAL, T_REMOV, 229 "WangDAT ", "Model 1300 ", ""}, {0, 0, { 230 {0, 0, 0}, /* minor 0-3 */ 231 {ST_Q_FORCE_BLKSIZE, 512, DDS}, /* minor 4-7 */ 232 {ST_Q_FORCE_BLKSIZE, 1024, DDS}, /* minor 8-11 */ 233 {ST_Q_FORCE_BLKSIZE, 0, DDS} /* minor 12-15 */ 234 }}}, 235 {{T_SEQUENTIAL, T_REMOV, 236 "EXABYTE ", "EXB-8200 ", "263H"}, {0, 5, { 237 {0, 0, 0}, /* minor 0-3 */ 238 {0, 0, 0}, /* minor 4-7 */ 239 {0, 0, 0}, /* minor 8-11 */ 240 {0, 0, 0} /* minor 12-15 */ 241 }}}, 242 {{T_SEQUENTIAL, T_REMOV, 243 "STK", "9490", ""}, 244 {ST_Q_FORCE_BLKSIZE, 0, { 245 {0, 0, 0}, /* minor 0-3 */ 246 {0, 0, 0}, /* minor 4-7 */ 247 {0, 0, 0}, /* minor 8-11 */ 248 {0, 0, 0} /* minor 12-15 */ 249 }}}, 250 {{T_SEQUENTIAL, T_REMOV, 251 "STK", "SD-3", ""}, 252 {ST_Q_FORCE_BLKSIZE, 0, { 253 {0, 0, 0}, /* minor 0-3 */ 254 {0, 0, 0}, /* minor 4-7 */ 255 {0, 0, 0}, /* minor 8-11 */ 256 {0, 0, 0} /* minor 12-15 */ 257 }}}, 258 {{T_SEQUENTIAL, T_REMOV, 259 "IBM", "03590", ""}, {ST_Q_IGNORE_LOADS, 0, { 260 {0, 0, 0}, /* minor 0-3 */ 261 {0, 0, 0}, /* minor 4-7 */ 262 {0, 0, 0}, /* minor 8-11 */ 263 {0, 0, 0} /* minor 12-15 */ 264 }}}, 265 {{T_SEQUENTIAL, T_REMOV, 266 "HP ", "T4000s ", ""}, {ST_Q_UNIMODAL, 0, { 267 {0, 0, QIC_3095}, /* minor 0-3 */ 268 {0, 0, QIC_3095}, /* minor 4-7 */ 269 {0, 0, QIC_3095}, /* minor 8-11 */ 270 {0, 0, QIC_3095}, /* minor 12-15 */ 271 }}}, 272 #if 0 273 {{T_SEQUENTIAL, T_REMOV, 274 "EXABYTE ", "EXB-8200 ", ""}, {0, 12, { 275 {0, 0, 0}, /* minor 0-3 */ 276 {0, 0, 0}, /* minor 4-7 */ 277 {0, 0, 0}, /* minor 8-11 */ 278 {0, 0, 0} /* minor 12-15 */ 279 }}}, 280 #endif 281 {{T_SEQUENTIAL, T_REMOV, 282 "TEAC ", "MT-2ST/N50 ", ""}, {ST_Q_IGNORE_LOADS, 0, { 283 {0, 0, 0}, /* minor 0-3 */ 284 {0, 0, 0}, /* minor 4-7 */ 285 {0, 0, 0}, /* minor 8-11 */ 286 {0, 0, 0} /* minor 12-15 */ 287 }}}, 288 {{T_SEQUENTIAL, T_REMOV, 289 "OnStream", "ADR50 Drive", ""}, {ST_Q_UNIMODAL, 0, { 290 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 291 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 4-7 */ 292 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 8-11 */ 293 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 12-15 */ 294 }}}, 295 {{T_SEQUENTIAL, T_REMOV, 296 "OnStream DI-30", "", "1.0"}, {ST_Q_NOFILEMARKS, 0, { 297 {0, 0, 0}, /* minor 0-3 */ 298 {0, 0, 0}, /* minor 4-7 */ 299 {0, 0, 0}, /* minor 8-11 */ 300 {0, 0, 0} /* minor 12-15 */ 301 }}}, 302 {{T_SEQUENTIAL, T_REMOV, 303 "NCR H621", "0-STD-03-46F880 ", ""}, {ST_Q_NOPREVENT, 0, { 304 {0, 0, 0}, /* minor 0-3 */ 305 {0, 0, 0}, /* minor 4-7 */ 306 {0, 0, 0}, /* minor 8-11 */ 307 {0, 0, 0} /* minor 12-15 */ 308 }}}, 309 }; 310 311 #define NOEJECT 0 312 #define EJECT 1 313 314 static void st_identify_drive(struct st_softc *, 315 struct scsipi_inquiry_pattern *); 316 static void st_loadquirks(struct st_softc *); 317 static int st_mount_tape(dev_t, int); 318 static void st_unmount(struct st_softc *, boolean); 319 static int st_decide_mode(struct st_softc *, boolean); 320 static void ststart(struct scsipi_periph *); 321 static void strestart(void *); 322 static void stdone(struct scsipi_xfer *, int); 323 static int st_read(struct st_softc *, char *, int, int); 324 static int st_space(struct st_softc *, int, u_int, int); 325 static int st_write_filemarks(struct st_softc *, int, int); 326 static int st_check_eod(struct st_softc *, boolean, int *, int); 327 static int st_load(struct st_softc *, u_int, int); 328 static int st_rewind(struct st_softc *, u_int, int); 329 static int st_interpret_sense(struct scsipi_xfer *); 330 static int st_touch_tape(struct st_softc *); 331 static int st_erase(struct st_softc *, int full, int flags); 332 static int st_rdpos(struct st_softc *, int, u_int32_t *); 333 static int st_setpos(struct st_softc *, int, u_int32_t *); 334 335 static const struct scsipi_periphsw st_switch = { 336 st_interpret_sense, 337 ststart, 338 NULL, 339 stdone 340 }; 341 342 #if defined(ST_ENABLE_EARLYWARN) 343 #define ST_INIT_FLAGS ST_EARLYWARN 344 #else 345 #define ST_INIT_FLAGS 0 346 #endif 347 348 /* 349 * The routine called by the low level scsi routine when it discovers 350 * A device suitable for this driver 351 */ 352 void 353 stattach(struct device *parent, struct st_softc *st, void *aux) 354 { 355 struct scsipibus_attach_args *sa = aux; 356 struct scsipi_periph *periph = sa->sa_periph; 357 int cmaj, bmaj, unit; 358 device_t self = &st->sc_dev; 359 360 SC_DEBUG(periph, SCSIPI_DB2, ("stattach: ")); 361 362 /* 363 * Store information needed to contact our base driver 364 */ 365 st->sc_periph = periph; 366 periph->periph_dev = &st->sc_dev; 367 periph->periph_switch = &st_switch; 368 369 /* 370 * Set initial flags 371 */ 372 373 st->flags = ST_INIT_FLAGS; 374 375 /* 376 * Set up the buf queue for this device 377 */ 378 bufq_alloc(&st->buf_queue, "fcfs", 0); 379 380 callout_init(&st->sc_callout, 0); 381 382 /* 383 * Check if the drive is a known criminal and take 384 * Any steps needed to bring it into line 385 */ 386 st_identify_drive(st, &sa->sa_inqbuf); 387 /* 388 * Use the subdriver to request information regarding the drive. 389 */ 390 printf("\n"); 391 printf("%s: %s", device_xname(&st->sc_dev), st->quirkdata ? "quirks apply, " : ""); 392 if (scsipi_test_unit_ready(periph, 393 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE) || 394 st->ops(st, ST_OPS_MODESENSE, 395 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE)) 396 printf("drive empty\n"); 397 else { 398 printf("density code %d, ", st->media_density); 399 if (st->media_blksize > 0) 400 printf("%d-byte", st->media_blksize); 401 else 402 printf("variable"); 403 printf(" blocks, write-%s\n", 404 (st->flags & ST_READONLY) ? "protected" : "enabled"); 405 } 406 407 st->stats = iostat_alloc(IOSTAT_TAPE, parent, device_xname(&st->sc_dev)); 408 409 #if NRND > 0 410 rnd_attach_source(&st->rnd_source, device_xname(&st->sc_dev), 411 RND_TYPE_TAPE, 0); 412 #endif 413 414 cmaj = cdevsw_lookup_major(&st_cdevsw); 415 bmaj = bdevsw_lookup_major(&st_bdevsw); 416 unit = device_unit(self) * 16; 417 418 /* raw device files */ 419 device_register_name(makedev(cmaj, unit), self, true, 420 DEV_OTHER, "rst%d", device_unit(self)); 421 device_register_name(makedev(cmaj, unit + 1), self, true, 422 DEV_OTHER, "nrst%d", device_unit(self)); 423 device_register_name(makedev(cmaj, unit + 2), self, true, 424 DEV_OTHER, "erst%d", device_unit(self)); 425 device_register_name(makedev(cmaj, unit + 3), self, true, 426 DEV_OTHER, "enrst%d", device_unit(self)); 427 428 /* block devices */ 429 device_register_name(makedev(bmaj, unit), self, false, 430 DEV_OTHER, "st%d", device_unit(self)); 431 device_register_name(makedev(bmaj, unit + 1), self, false, 432 DEV_OTHER, "nst%d", device_unit(self)); 433 device_register_name(makedev(bmaj, unit + 2), self, false, 434 DEV_OTHER, "est%d", device_unit(self)); 435 device_register_name(makedev(bmaj, unit + 3), self, false, 436 DEV_OTHER, "enst%d", device_unit(self)); 437 } 438 439 int 440 stactivate(struct device *self, enum devact act) 441 { 442 int rv = 0; 443 444 switch (act) { 445 case DVACT_ACTIVATE: 446 rv = EOPNOTSUPP; 447 break; 448 449 case DVACT_DEACTIVATE: 450 /* 451 * Nothing to do; we key off the device's DVF_ACTIVE. 452 */ 453 break; 454 } 455 return (rv); 456 } 457 458 int 459 stdetach(struct device *self, int flags) 460 { 461 struct st_softc *st = device_private(self); 462 int s, bmaj, cmaj, mn; 463 464 /* locate the major number */ 465 bmaj = bdevsw_lookup_major(&st_bdevsw); 466 cmaj = cdevsw_lookup_major(&st_cdevsw); 467 468 /* kill any pending restart */ 469 callout_stop(&st->sc_callout); 470 471 s = splbio(); 472 473 /* Kill off any queued buffers. */ 474 bufq_drain(st->buf_queue); 475 476 bufq_free(st->buf_queue); 477 478 /* Kill off any pending commands. */ 479 scsipi_kill_pending(st->sc_periph); 480 481 splx(s); 482 483 /* Nuke the vnodes for any open instances */ 484 mn = STUNIT(device_unit(self)); 485 vdevgone(bmaj, mn, mn+STNMINOR-1, VBLK); 486 vdevgone(cmaj, mn, mn+STNMINOR-1, VCHR); 487 488 iostat_free(st->stats); 489 490 #if NRND > 0 491 /* Unhook the entropy source. */ 492 rnd_detach_source(&st->rnd_source); 493 #endif 494 495 return (0); 496 } 497 498 /* 499 * Use the inquiry routine in 'scsi_base' to get drive info so we can 500 * Further tailor our behaviour. 501 */ 502 static void 503 st_identify_drive(struct st_softc *st, struct scsipi_inquiry_pattern *inqbuf) 504 { 505 const struct st_quirk_inquiry_pattern *finger; 506 int priority; 507 508 finger = scsipi_inqmatch(inqbuf, 509 st_quirk_patterns, 510 sizeof(st_quirk_patterns) / sizeof(st_quirk_patterns[0]), 511 sizeof(st_quirk_patterns[0]), &priority); 512 if (priority != 0) { 513 st->quirkdata = &finger->quirkdata; 514 st->drive_quirks = finger->quirkdata.quirks; 515 st->quirks = finger->quirkdata.quirks; /* start value */ 516 st->page_0_size = finger->quirkdata.page_0_size; 517 st_loadquirks(st); 518 } 519 } 520 521 /* 522 * initialise the subdevices to the default (QUIRK) state. 523 * this will remove any setting made by the system operator or previous 524 * operations. 525 */ 526 static void 527 st_loadquirks(struct st_softc *st) 528 { 529 int i; 530 const struct modes *mode; 531 struct modes *mode2; 532 533 mode = st->quirkdata->modes; 534 mode2 = st->modes; 535 for (i = 0; i < 4; i++) { 536 memset(mode2, 0, sizeof(struct modes)); 537 st->modeflags[i] &= ~(BLKSIZE_SET_BY_QUIRK | 538 DENSITY_SET_BY_QUIRK | BLKSIZE_SET_BY_USER | 539 DENSITY_SET_BY_USER); 540 if ((mode->quirks | st->drive_quirks) & ST_Q_FORCE_BLKSIZE) { 541 mode2->blksize = mode->blksize; 542 st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; 543 } 544 if (mode->density) { 545 mode2->density = mode->density; 546 st->modeflags[i] |= DENSITY_SET_BY_QUIRK; 547 } 548 mode2->quirks |= mode->quirks; 549 mode++; 550 mode2++; 551 } 552 } 553 554 /* 555 * open the device. 556 */ 557 static int 558 stopen(dev_t dev, int flags, int mode, struct lwp *l) 559 { 560 u_int stmode, dsty; 561 int error, sflags, unit, tries, ntries; 562 struct st_softc *st; 563 struct scsipi_periph *periph; 564 struct scsipi_adapter *adapt; 565 566 unit = STUNIT(dev); 567 if (unit >= st_cd.cd_ndevs) 568 return (ENXIO); 569 st = st_cd.cd_devs[unit]; 570 if (st == NULL) 571 return (ENXIO); 572 573 stmode = STMODE(dev); 574 dsty = STDSTY(dev); 575 576 periph = st->sc_periph; 577 adapt = periph->periph_channel->chan_adapter; 578 579 SC_DEBUG(periph, SCSIPI_DB1, ("open: dev=0x%x (unit %d (of %d))\n", dev, 580 unit, st_cd.cd_ndevs)); 581 582 583 /* 584 * Only allow one at a time 585 */ 586 if (periph->periph_flags & PERIPH_OPEN) { 587 aprint_error_dev(&st->sc_dev, "already open\n"); 588 return (EBUSY); 589 } 590 591 if ((error = scsipi_adapter_addref(adapt)) != 0) 592 return (error); 593 594 /* 595 * clear any latched errors. 596 */ 597 st->mt_resid = 0; 598 st->mt_erreg = 0; 599 st->asc = 0; 600 st->ascq = 0; 601 602 /* 603 * Catch any unit attention errors. Be silent about this 604 * unless we're already mounted. We ignore media change 605 * if we're in control mode or not mounted yet. 606 */ 607 if ((st->flags & ST_MOUNTED) == 0 || stmode == CTRL_MODE) { 608 #ifdef SCSIDEBUG 609 sflags = XS_CTL_IGNORE_MEDIA_CHANGE; 610 #else 611 sflags = XS_CTL_SILENT|XS_CTL_IGNORE_MEDIA_CHANGE; 612 #endif 613 } else 614 sflags = 0; 615 616 /* 617 * If we're already mounted or we aren't configured for 618 * a mount delay, only try a test unit ready once. Otherwise, 619 * try up to ST_MOUNT_DELAY times with a rest interval of 620 * one second between each try. 621 */ 622 623 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0) { 624 ntries = 1; 625 } else { 626 ntries = ST_MOUNT_DELAY; 627 } 628 629 for (error = tries = 0; tries < ntries; tries++) { 630 int slpintr, oflags; 631 632 /* 633 * If we had no error, or we're opening the control mode 634 * device, we jump out right away. 635 */ 636 637 error = scsipi_test_unit_ready(periph, sflags); 638 if (error == 0 || stmode == CTRL_MODE) { 639 break; 640 } 641 642 /* 643 * We had an error. 644 * 645 * If we're already mounted or we aren't configured for 646 * a mount delay, or the error isn't a NOT READY error, 647 * skip to the error exit now. 648 */ 649 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0 || 650 (st->mt_key != SKEY_NOT_READY)) { 651 goto bad; 652 } 653 654 /* 655 * clear any latched errors. 656 */ 657 st->mt_resid = 0; 658 st->mt_erreg = 0; 659 st->asc = 0; 660 st->ascq = 0; 661 662 /* 663 * Fake that we have the device open so 664 * we block other apps from getting in. 665 */ 666 667 oflags = periph->periph_flags; 668 periph->periph_flags |= PERIPH_OPEN; 669 670 slpintr = tsleep(&lbolt, PUSER|PCATCH, "stload", 0); 671 672 periph->periph_flags = oflags; /* restore flags */ 673 if (slpintr) { 674 goto bad; 675 } 676 } 677 678 679 /* 680 * If the mode is 3 (e.g. minor = 3,7,11,15) then the device has 681 * been opened to set defaults and perform other, usually non-I/O 682 * related, operations. In this case, do a quick check to see 683 * whether the unit actually had a tape loaded (this will be known 684 * as to whether or not we got a NOT READY for the above 685 * unit attention). If a tape is there, go do a mount sequence. 686 */ 687 if (stmode == CTRL_MODE && st->mt_key == SKEY_NOT_READY) { 688 periph->periph_flags |= PERIPH_OPEN; 689 return (0); 690 } 691 692 /* 693 * If we get this far and had an error set, that means we failed 694 * to pass the 'test unit ready' test for the non-controlmode device, 695 * so we bounce the open. 696 */ 697 698 if (error) 699 return (error); 700 701 /* 702 * Else, we're now committed to saying we're open. 703 */ 704 705 periph->periph_flags |= PERIPH_OPEN; /* unit attn are now errors */ 706 707 /* 708 * If it's a different mode, or if the media has been 709 * invalidated, unmount the tape from the previous 710 * session but continue with open processing 711 */ 712 if (st->last_dsty != dsty || 713 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 714 st_unmount(st, NOEJECT); 715 716 /* 717 * If we are not mounted, then we should start a new 718 * mount session. 719 */ 720 if (!(st->flags & ST_MOUNTED)) { 721 if ((error = st_mount_tape(dev, flags)) != 0) 722 goto bad; 723 st->last_dsty = dsty; 724 } 725 if (!(st->quirks & ST_Q_NOPREVENT)) { 726 scsipi_prevent(periph, SPAMR_PREVENT_DT, 727 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 728 } 729 730 SC_DEBUG(periph, SCSIPI_DB2, ("open complete\n")); 731 return (0); 732 733 bad: 734 st_unmount(st, NOEJECT); 735 scsipi_adapter_delref(adapt); 736 periph->periph_flags &= ~PERIPH_OPEN; 737 return (error); 738 } 739 740 /* 741 * close the device.. only called if we are the LAST 742 * occurence of an open device 743 */ 744 static int 745 stclose(dev_t dev, int flags, int mode, struct lwp *l) 746 { 747 int stxx, error = 0; 748 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 749 struct scsipi_periph *periph = st->sc_periph; 750 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 751 752 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("closing\n")); 753 754 /* 755 * Make sure that a tape opened in write-only mode will have 756 * file marks written on it when closed, even if not written to. 757 * 758 * This is for SUN compatibility. Actually, the Sun way of 759 * things is to: 760 * 761 * only write filemarks if there are fmks to be written and 762 * - open for write (possibly read/write) 763 * - the last operation was a write 764 * or: 765 * - opened for wronly 766 * - no data was written (including filemarks) 767 */ 768 769 stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); 770 if (((flags & FWRITE) && stxx == ST_WRITTEN) || 771 ((flags & O_ACCMODE) == FWRITE && stxx == 0)) { 772 int nm; 773 error = st_check_eod(st, FALSE, &nm, 0); 774 } 775 776 /* 777 * Allow robots to eject tape if needed. 778 */ 779 scsipi_prevent(periph, SPAMR_ALLOW, 780 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 781 782 switch (STMODE(dev)) { 783 case NORMAL_MODE: 784 st_unmount(st, NOEJECT); 785 break; 786 case NOREW_MODE: 787 case CTRL_MODE: 788 /* 789 * Leave mounted unless media seems to have been removed. 790 * 791 * Otherwise, if we're to terminate a tape with more than one 792 * filemark [ and because we're not rewinding here ], backspace 793 * one filemark so that later appends will see an unbroken 794 * sequence of: 795 * 796 * file - FMK - file - FMK ... file - FMK FMK (EOM) 797 */ 798 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 799 st_unmount(st, NOEJECT); 800 } else if (error == 0) { 801 /* 802 * ST_WRITTEN was preserved from above. 803 * 804 * All we need to know here is: 805 * 806 * Were we writing this tape and was the last 807 * operation a write? 808 * 809 * Are there supposed to be 2FM at EOD? 810 * 811 * If both statements are true, then we backspace 812 * one filemark. 813 */ 814 stxx |= (st->flags & ST_2FM_AT_EOD); 815 if ((flags & FWRITE) != 0 && 816 (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { 817 error = st_space(st, -1, SP_FILEMARKS, 0); 818 } 819 } 820 break; 821 case EJECT_MODE: 822 st_unmount(st, EJECT); 823 break; 824 } 825 826 scsipi_wait_drain(periph); 827 828 scsipi_adapter_delref(adapt); 829 periph->periph_flags &= ~PERIPH_OPEN; 830 831 return (error); 832 } 833 834 /* 835 * Start a new mount session. 836 * Copy in all the default parameters from the selected device mode. 837 * and try guess any that seem to be defaulted. 838 */ 839 static int 840 st_mount_tape(dev_t dev, int flags) 841 { 842 int unit; 843 u_int dsty; 844 struct st_softc *st; 845 struct scsipi_periph *periph; 846 int error = 0; 847 848 unit = STUNIT(dev); 849 dsty = STDSTY(dev); 850 st = st_cd.cd_devs[unit]; 851 periph = st->sc_periph; 852 853 if (st->flags & ST_MOUNTED) 854 return (0); 855 856 SC_DEBUG(periph, SCSIPI_DB1, ("mounting\n ")); 857 st->flags |= ST_NEW_MOUNT; 858 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 859 /* 860 * If the media is new, then make sure we give it a chance to 861 * to do a 'load' instruction. (We assume it is new.) 862 */ 863 if ((error = st_load(st, LD_LOAD, XS_CTL_SILENT)) != 0) 864 return (error); 865 /* 866 * Throw another dummy instruction to catch 867 * 'Unit attention' errors. Many drives give 868 * these after doing a Load instruction (with 869 * the MEDIUM MAY HAVE CHANGED asc/ascq). 870 */ 871 scsipi_test_unit_ready(periph, XS_CTL_SILENT); /* XXX */ 872 873 /* 874 * Some devices can't tell you much until they have been 875 * asked to look at the media. This quirk does this. 876 */ 877 if (st->quirks & ST_Q_SENSE_HELP) 878 if ((error = st_touch_tape(st)) != 0) 879 return (error); 880 /* 881 * Load the physical device parameters 882 * loads: blkmin, blkmax 883 */ 884 if ((error = st->ops(st, ST_OPS_RBL, 0)) != 0) 885 return (error); 886 /* 887 * Load the media dependent parameters 888 * includes: media_blksize,media_density,numblks 889 * As we have a tape in, it should be reflected here. 890 * If not you may need the "quirk" above. 891 */ 892 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 893 return (error); 894 /* 895 * If we have gained a permanent density from somewhere, 896 * then use it in preference to the one supplied by 897 * default by the driver. 898 */ 899 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 900 st->density = st->modes[dsty].density; 901 else 902 st->density = st->media_density; 903 /* 904 * If we have gained a permanent blocksize 905 * then use it in preference to the one supplied by 906 * default by the driver. 907 */ 908 st->flags &= ~ST_FIXEDBLOCKS; 909 if (st->modeflags[dsty] & 910 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 911 st->blksize = st->modes[dsty].blksize; 912 if (st->blksize) 913 st->flags |= ST_FIXEDBLOCKS; 914 } else { 915 if ((error = st_decide_mode(st, FALSE)) != 0) 916 return (error); 917 } 918 if ((error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 919 /* ATAPI will return ENODEV for this, and this may be OK */ 920 if (error != ENODEV) { 921 aprint_error_dev(&st->sc_dev, "cannot set selected mode\n"); 922 return (error); 923 } 924 } 925 st->flags &= ~ST_NEW_MOUNT; 926 st->flags |= ST_MOUNTED; 927 periph->periph_flags |= PERIPH_MEDIA_LOADED; /* move earlier? */ 928 st->blkno = st->fileno = (daddr_t) 0; 929 return (0); 930 } 931 932 /* 933 * End the present mount session. 934 * Rewind, and optionally eject the tape. 935 * Reset various flags to indicate that all new 936 * operations require another mount operation 937 */ 938 static void 939 st_unmount(struct st_softc *st, boolean eject) 940 { 941 struct scsipi_periph *periph = st->sc_periph; 942 int nmarks; 943 944 if ((st->flags & ST_MOUNTED) == 0) 945 return; 946 SC_DEBUG(periph, SCSIPI_DB1, ("unmounting\n")); 947 st_check_eod(st, FALSE, &nmarks, XS_CTL_IGNORE_NOT_READY); 948 st_rewind(st, 0, XS_CTL_IGNORE_NOT_READY); 949 950 /* 951 * Section 9.3.3 of the SCSI specs states that a device shall return 952 * the density value specified in the last succesfull MODE SELECT 953 * after an unload operation, in case it is not able to 954 * automatically determine the density of the new medium. 955 * 956 * So we instruct the device to use the default density, which will 957 * prevent the use of stale density values (in particular, 958 * in st_touch_tape(). 959 */ 960 st->density = 0; 961 if (st->ops(st, ST_OPS_MODESELECT, 0) != 0) { 962 aprint_error_dev(&st->sc_dev, "WARNING: cannot revert to default density\n"); 963 } 964 965 if (eject) { 966 if (!(st->quirks & ST_Q_NOPREVENT)) { 967 scsipi_prevent(periph, SPAMR_ALLOW, 968 XS_CTL_IGNORE_ILLEGAL_REQUEST | 969 XS_CTL_IGNORE_NOT_READY); 970 } 971 st_load(st, LD_UNLOAD, XS_CTL_IGNORE_NOT_READY); 972 st->blkno = st->fileno = (daddr_t) -1; 973 } else { 974 st->blkno = st->fileno = (daddr_t) 0; 975 } 976 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 977 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 978 } 979 980 /* 981 * Given all we know about the device, media, mode, 'quirks' and 982 * initial operation, make a decision as to how we should be set 983 * to run (regarding blocking and EOD marks) 984 */ 985 int 986 st_decide_mode(struct st_softc *st, boolean first_read) 987 { 988 989 SC_DEBUG(st->sc_periph, SCSIPI_DB2, ("starting block mode decision\n")); 990 991 /* 992 * If the drive can only handle fixed-length blocks and only at 993 * one size, perhaps we should just do that. 994 */ 995 if (st->blkmin && (st->blkmin == st->blkmax)) { 996 st->flags |= ST_FIXEDBLOCKS; 997 st->blksize = st->blkmin; 998 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 999 ("blkmin == blkmax of %d\n", st->blkmin)); 1000 goto done; 1001 } 1002 /* 1003 * If the tape density mandates (or even suggests) use of fixed 1004 * or variable-length blocks, comply. 1005 */ 1006 switch (st->density) { 1007 case HALFINCH_800: 1008 case HALFINCH_1600: 1009 case HALFINCH_6250: 1010 case DDS: 1011 st->flags &= ~ST_FIXEDBLOCKS; 1012 st->blksize = 0; 1013 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1014 ("density specified variable\n")); 1015 goto done; 1016 case QIC_11: 1017 case QIC_24: 1018 case QIC_120: 1019 case QIC_150: 1020 case QIC_525: 1021 case QIC_1320: 1022 case QIC_3095: 1023 case QIC_3220: 1024 st->flags |= ST_FIXEDBLOCKS; 1025 if (st->media_blksize > 0) 1026 st->blksize = st->media_blksize; 1027 else 1028 st->blksize = DEF_FIXED_BSIZE; 1029 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1030 ("density specified fixed\n")); 1031 goto done; 1032 } 1033 /* 1034 * If we're about to read the tape, perhaps we should choose 1035 * fixed or variable-length blocks and block size according to 1036 * what the drive found on the tape. 1037 */ 1038 if (first_read && 1039 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 1040 (st->media_blksize == DEF_FIXED_BSIZE) || 1041 (st->media_blksize == 1024))) { 1042 if (st->media_blksize > 0) 1043 st->flags |= ST_FIXEDBLOCKS; 1044 else 1045 st->flags &= ~ST_FIXEDBLOCKS; 1046 st->blksize = st->media_blksize; 1047 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1048 ("Used media_blksize of %d\n", st->media_blksize)); 1049 goto done; 1050 } 1051 /* 1052 * We're getting no hints from any direction. Choose variable- 1053 * length blocks arbitrarily. 1054 */ 1055 st->flags &= ~ST_FIXEDBLOCKS; 1056 st->blksize = 0; 1057 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1058 ("Give up and default to variable mode\n")); 1059 1060 done: 1061 /* 1062 * Decide whether or not to write two file marks to signify end- 1063 * of-data. Make the decision as a function of density. If 1064 * the decision is not to use a second file mark, the SCSI BLANK 1065 * CHECK condition code will be recognized as end-of-data when 1066 * first read. 1067 * (I think this should be a by-product of fixed/variable..julian) 1068 */ 1069 switch (st->density) { 1070 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 1071 case QIC_11: 1072 case QIC_24: 1073 case QIC_120: 1074 case QIC_150: 1075 case QIC_525: 1076 case QIC_1320: 1077 case QIC_3095: 1078 case QIC_3220: 1079 st->flags &= ~ST_2FM_AT_EOD; 1080 break; 1081 default: 1082 st->flags |= ST_2FM_AT_EOD; 1083 } 1084 return (0); 1085 } 1086 1087 /* 1088 * Actually translate the requested transfer into 1089 * one the physical driver can understand 1090 * The transfer is described by a buf and will include 1091 * only one physical transfer. 1092 */ 1093 static void 1094 ststrategy(struct buf *bp) 1095 { 1096 struct st_softc *st = st_cd.cd_devs[STUNIT(bp->b_dev)]; 1097 int s; 1098 1099 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1100 ("ststrategy %d bytes @ blk %" PRId64 "\n", bp->b_bcount, bp->b_blkno)); 1101 /* 1102 * If it's a null transfer, return immediatly 1103 */ 1104 if (bp->b_bcount == 0) 1105 goto done; 1106 1107 /* If offset is negative, error */ 1108 if (bp->b_blkno < 0) { 1109 bp->b_error = EINVAL; 1110 goto done; 1111 } 1112 1113 /* 1114 * Odd sized request on fixed drives are verboten 1115 */ 1116 if (st->flags & ST_FIXEDBLOCKS) { 1117 if (bp->b_bcount % st->blksize) { 1118 aprint_error_dev(&st->sc_dev, "bad request, must be multiple of %d\n", 1119 st->blksize); 1120 bp->b_error = EIO; 1121 goto done; 1122 } 1123 } 1124 /* 1125 * as are out-of-range requests on variable drives. 1126 */ 1127 else if (bp->b_bcount < st->blkmin || 1128 (st->blkmax && bp->b_bcount > st->blkmax)) { 1129 aprint_error_dev(&st->sc_dev, "bad request, must be between %d and %d\n", 1130 st->blkmin, st->blkmax); 1131 bp->b_error = EIO; 1132 goto done; 1133 } 1134 s = splbio(); 1135 1136 /* 1137 * Place it in the queue of activities for this tape 1138 * at the end (a bit silly because we only have on user.. 1139 * (but it could fork())) 1140 */ 1141 BUFQ_PUT(st->buf_queue, bp); 1142 1143 /* 1144 * Tell the device to get going on the transfer if it's 1145 * not doing anything, otherwise just wait for completion 1146 * (All a bit silly if we're only allowing 1 open but..) 1147 */ 1148 ststart(st->sc_periph); 1149 1150 splx(s); 1151 return; 1152 done: 1153 /* 1154 * Correctly set the buf to indicate a completed xfer 1155 */ 1156 bp->b_resid = bp->b_bcount; 1157 biodone(bp); 1158 return; 1159 } 1160 1161 /* 1162 * ststart looks to see if there is a buf waiting for the device 1163 * and that the device is not already busy. If both are true, 1164 * It dequeues the buf and creates a scsi command to perform the 1165 * transfer required. The transfer request will call scsipi_done 1166 * on completion, which will in turn call this routine again 1167 * so that the next queued transfer is performed. 1168 * The bufs are queued by the strategy routine (ststrategy) 1169 * 1170 * This routine is also called after other non-queued requests 1171 * have been made of the scsi driver, to ensure that the queue 1172 * continues to be drained. 1173 * ststart() is called at splbio 1174 */ 1175 static void 1176 ststart(struct scsipi_periph *periph) 1177 { 1178 struct st_softc *st = (void *)periph->periph_dev; 1179 struct buf *bp; 1180 struct scsi_rw_tape cmd; 1181 struct scsipi_xfer *xs; 1182 int flags, error; 1183 1184 SC_DEBUG(periph, SCSIPI_DB2, ("ststart ")); 1185 /* 1186 * See if there is a buf to do and we are not already 1187 * doing one 1188 */ 1189 while (periph->periph_active < periph->periph_openings) { 1190 /* if a special awaits, let it proceed first */ 1191 if (periph->periph_flags & PERIPH_WAITING) { 1192 periph->periph_flags &= ~PERIPH_WAITING; 1193 wakeup((void *)periph); 1194 return; 1195 } 1196 1197 /* 1198 * If the device has been unmounted by the user 1199 * then throw away all requests until done. 1200 */ 1201 if (__predict_false((st->flags & ST_MOUNTED) == 0 || 1202 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0)) { 1203 if ((bp = BUFQ_GET(st->buf_queue)) != NULL) { 1204 /* make sure that one implies the other.. */ 1205 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 1206 bp->b_error = EIO; 1207 bp->b_resid = bp->b_bcount; 1208 biodone(bp); 1209 continue; 1210 } else { 1211 return; 1212 } 1213 } 1214 1215 if ((bp = BUFQ_PEEK(st->buf_queue)) == NULL) 1216 return; 1217 1218 iostat_busy(st->stats); 1219 1220 /* 1221 * only FIXEDBLOCK devices have pending I/O or space operations. 1222 */ 1223 if (st->flags & ST_FIXEDBLOCKS) { 1224 /* 1225 * If we are at a filemark but have not reported it yet 1226 * then we should report it now 1227 */ 1228 if (st->flags & ST_AT_FILEMARK) { 1229 if ((bp->b_flags & B_READ) == B_WRITE) { 1230 /* 1231 * Handling of ST_AT_FILEMARK in 1232 * st_space will fill in the right file 1233 * mark count. 1234 * Back up over filemark 1235 */ 1236 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1237 BUFQ_GET(st->buf_queue); 1238 bp->b_error = EIO; 1239 bp->b_resid = bp->b_bcount; 1240 biodone(bp); 1241 continue; 1242 } 1243 } else { 1244 BUFQ_GET(st->buf_queue); 1245 bp->b_resid = bp->b_bcount; 1246 bp->b_error = 0; 1247 st->flags &= ~ST_AT_FILEMARK; 1248 biodone(bp); 1249 continue; /* seek more work */ 1250 } 1251 } 1252 } 1253 /* 1254 * If we are at EOM but have not reported it 1255 * yet then we should report it now. 1256 */ 1257 if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { 1258 BUFQ_GET(st->buf_queue); 1259 bp->b_resid = bp->b_bcount; 1260 if (st->flags & ST_EIO_PENDING) 1261 bp->b_error = EIO; 1262 st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); 1263 biodone(bp); 1264 continue; /* seek more work */ 1265 } 1266 1267 /* 1268 * Fill out the scsi command 1269 */ 1270 memset(&cmd, 0, sizeof(cmd)); 1271 flags = XS_CTL_NOSLEEP | XS_CTL_ASYNC; 1272 if ((bp->b_flags & B_READ) == B_WRITE) { 1273 cmd.opcode = WRITE; 1274 st->flags &= ~ST_FM_WRITTEN; 1275 flags |= XS_CTL_DATA_OUT; 1276 } else { 1277 cmd.opcode = READ; 1278 flags |= XS_CTL_DATA_IN; 1279 } 1280 1281 /* 1282 * Handle "fixed-block-mode" tape drives by using the 1283 * block count instead of the length. 1284 */ 1285 if (st->flags & ST_FIXEDBLOCKS) { 1286 cmd.byte2 |= SRW_FIXED; 1287 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1288 } else 1289 _lto3b(bp->b_bcount, cmd.len); 1290 1291 /* 1292 * Clear 'position updated' indicator 1293 */ 1294 st->flags &= ~ST_POSUPDATED; 1295 1296 /* 1297 * go ask the adapter to do all this for us 1298 */ 1299 xs = scsipi_make_xs(periph, 1300 (struct scsipi_generic *)&cmd, sizeof(cmd), 1301 (u_char *)bp->b_data, bp->b_bcount, 1302 0, ST_IO_TIME, bp, flags); 1303 if (__predict_false(xs == NULL)) { 1304 /* 1305 * out of memory. Keep this buffer in the queue, and 1306 * retry later. 1307 */ 1308 callout_reset(&st->sc_callout, hz / 2, strestart, 1309 periph); 1310 return; 1311 } 1312 /* 1313 * need to dequeue the buffer before queuing the command, 1314 * because cdstart may be called recursively from the 1315 * HBA driver 1316 */ 1317 #ifdef DIAGNOSTIC 1318 if (BUFQ_GET(st->buf_queue) != bp) 1319 panic("ststart(): dequeued wrong buf"); 1320 #else 1321 BUFQ_GET(st->buf_queue); 1322 #endif 1323 error = scsipi_execute_xs(xs); 1324 /* with a scsipi_xfer preallocated, scsipi_command can't fail */ 1325 KASSERT(error == 0); 1326 } /* go back and see if we can cram more work in.. */ 1327 } 1328 1329 static void 1330 strestart(void *v) 1331 { 1332 int s = splbio(); 1333 ststart((struct scsipi_periph *)v); 1334 splx(s); 1335 } 1336 1337 1338 static void 1339 stdone(struct scsipi_xfer *xs, int error) 1340 { 1341 struct st_softc *st = (void *)xs->xs_periph->periph_dev; 1342 struct buf *bp = xs->bp; 1343 1344 if (bp) { 1345 bp->b_error = error; 1346 bp->b_resid = xs->resid; 1347 /* 1348 * buggy device ? A SDLT320 can report an info 1349 * field of 0x3de8000 on a Media Error/Write Error 1350 * for this CBD: 0x0a 00 00 80 00 00 1351 */ 1352 if (bp->b_resid > bp->b_bcount || bp->b_resid < 0) 1353 bp->b_resid = bp->b_bcount; 1354 1355 if ((bp->b_flags & B_READ) == B_WRITE) 1356 st->flags |= ST_WRITTEN; 1357 else 1358 st->flags &= ~ST_WRITTEN; 1359 1360 iostat_unbusy(st->stats, bp->b_bcount, 1361 ((bp->b_flags & B_READ) == B_READ)); 1362 1363 #if NRND > 0 1364 rnd_add_uint32(&st->rnd_source, bp->b_blkno); 1365 #endif 1366 1367 if ((st->flags & ST_POSUPDATED) == 0) { 1368 if (error) { 1369 st->fileno = st->blkno = -1; 1370 } else if (st->blkno != -1) { 1371 if (st->flags & ST_FIXEDBLOCKS) 1372 st->blkno += 1373 (bp->b_bcount / st->blksize); 1374 else 1375 st->blkno++; 1376 } 1377 } 1378 1379 biodone(bp); 1380 } 1381 } 1382 1383 static int 1384 stread(dev_t dev, struct uio *uio, int iomode) 1385 { 1386 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1387 1388 return (physio(ststrategy, NULL, dev, B_READ, 1389 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1390 } 1391 1392 static int 1393 stwrite(dev_t dev, struct uio *uio, int iomode) 1394 { 1395 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1396 1397 return (physio(ststrategy, NULL, dev, B_WRITE, 1398 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1399 } 1400 1401 /* 1402 * Perform special action on behalf of the user; 1403 * knows about the internals of this device 1404 */ 1405 static int 1406 stioctl(dev_t dev, u_long cmd, void *arg, int flag, struct lwp *l) 1407 { 1408 int error = 0; 1409 int unit; 1410 int number, nmarks, dsty; 1411 int flags; 1412 struct st_softc *st; 1413 int hold_blksize; 1414 u_int8_t hold_density; 1415 struct mtop *mt = (struct mtop *) arg; 1416 1417 /* 1418 * Find the device that the user is talking about 1419 */ 1420 flags = 0; /* give error messages, act on errors etc. */ 1421 unit = STUNIT(dev); 1422 dsty = STDSTY(dev); 1423 st = st_cd.cd_devs[unit]; 1424 hold_blksize = st->blksize; 1425 hold_density = st->density; 1426 1427 switch ((u_int) cmd) { 1428 1429 case MTIOCGET: { 1430 struct mtget *g = (struct mtget *) arg; 1431 /* 1432 * (to get the current state of READONLY) 1433 */ 1434 error = st->ops(st, ST_OPS_MODESENSE, XS_CTL_SILENT); 1435 if (error) { 1436 /* 1437 * Ignore the error if in control mode; 1438 * this is mandated by st(4). 1439 */ 1440 if (STMODE(dev) != CTRL_MODE) 1441 break; 1442 error = 0; 1443 } 1444 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("[ioctl: get status]\n")); 1445 memset(g, 0, sizeof(struct mtget)); 1446 g->mt_type = 0x7; /* Ultrix compat *//*? */ 1447 g->mt_blksiz = st->blksize; 1448 g->mt_density = st->density; 1449 g->mt_mblksiz[0] = st->modes[0].blksize; 1450 g->mt_mblksiz[1] = st->modes[1].blksize; 1451 g->mt_mblksiz[2] = st->modes[2].blksize; 1452 g->mt_mblksiz[3] = st->modes[3].blksize; 1453 g->mt_mdensity[0] = st->modes[0].density; 1454 g->mt_mdensity[1] = st->modes[1].density; 1455 g->mt_mdensity[2] = st->modes[2].density; 1456 g->mt_mdensity[3] = st->modes[3].density; 1457 g->mt_fileno = st->fileno; 1458 g->mt_blkno = st->blkno; 1459 if (st->flags & ST_READONLY) 1460 g->mt_dsreg |= MT_DS_RDONLY; 1461 if (st->flags & ST_MOUNTED) 1462 g->mt_dsreg |= MT_DS_MOUNTED; 1463 g->mt_resid = st->mt_resid; 1464 g->mt_erreg = st->mt_erreg; 1465 /* 1466 * clear latched errors. 1467 */ 1468 st->mt_resid = 0; 1469 st->mt_erreg = 0; 1470 st->asc = 0; 1471 st->ascq = 0; 1472 break; 1473 } 1474 case MTIOCTOP: { 1475 1476 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1477 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1478 mt->mt_count)); 1479 1480 /* compat: in U*x it is a short */ 1481 number = mt->mt_count; 1482 switch ((short) (mt->mt_op)) { 1483 case MTWEOF: /* write an end-of-file record */ 1484 error = st_write_filemarks(st, number, flags); 1485 break; 1486 case MTBSF: /* backward space file */ 1487 number = -number; 1488 case MTFSF: /* forward space file */ 1489 error = st_check_eod(st, FALSE, &nmarks, flags); 1490 if (!error) 1491 error = st_space(st, number - nmarks, 1492 SP_FILEMARKS, flags); 1493 break; 1494 case MTBSR: /* backward space record */ 1495 number = -number; 1496 case MTFSR: /* forward space record */ 1497 error = st_check_eod(st, true, &nmarks, flags); 1498 if (!error) 1499 error = st_space(st, number, SP_BLKS, flags); 1500 break; 1501 case MTREW: /* rewind */ 1502 error = st_rewind(st, 0, flags); 1503 break; 1504 case MTOFFL: /* rewind and put the drive offline */ 1505 st_unmount(st, EJECT); 1506 break; 1507 case MTNOP: /* no operation, sets status only */ 1508 break; 1509 case MTRETEN: /* retension the tape */ 1510 error = st_load(st, LD_RETENSION, flags); 1511 if (!error) 1512 error = st_load(st, LD_LOAD, flags); 1513 break; 1514 case MTEOM: /* forward space to end of media */ 1515 error = st_check_eod(st, FALSE, &nmarks, flags); 1516 if (!error) 1517 error = st_space(st, 1, SP_EOM, flags); 1518 break; 1519 case MTCACHE: /* enable controller cache */ 1520 st->flags &= ~ST_DONTBUFFER; 1521 goto try_new_value; 1522 case MTNOCACHE: /* disable controller cache */ 1523 st->flags |= ST_DONTBUFFER; 1524 goto try_new_value; 1525 case MTERASE: /* erase volume */ 1526 error = st_erase(st, number, flags); 1527 break; 1528 case MTSETBSIZ: /* Set block size for device */ 1529 #ifdef NOTYET 1530 if (!(st->flags & ST_NEW_MOUNT)) { 1531 uprintf("re-mount tape before changing blocksize"); 1532 error = EINVAL; 1533 break; 1534 } 1535 #endif 1536 if (number == 0) 1537 st->flags &= ~ST_FIXEDBLOCKS; 1538 else { 1539 if ((st->blkmin || st->blkmax) && 1540 (number < st->blkmin || 1541 number > st->blkmax)) { 1542 error = EINVAL; 1543 break; 1544 } 1545 st->flags |= ST_FIXEDBLOCKS; 1546 } 1547 st->blksize = number; 1548 st->flags |= ST_BLOCK_SET; /*XXX */ 1549 goto try_new_value; 1550 1551 case MTSETDNSTY: /* Set density for device and mode */ 1552 /* 1553 * Any number >= 0 and <= 0xff is legal. Numbers 1554 * above 0x80 are 'vendor unique'. 1555 */ 1556 if (number < 0 || number > 255) { 1557 error = EINVAL; 1558 break; 1559 } else 1560 st->density = number; 1561 goto try_new_value; 1562 1563 case MTCMPRESS: 1564 error = st->ops(st, (number == 0) ? 1565 ST_OPS_CMPRSS_OFF : ST_OPS_CMPRSS_ON, 1566 XS_CTL_SILENT); 1567 break; 1568 1569 case MTEWARN: 1570 if (number) 1571 st->flags |= ST_EARLYWARN; 1572 else 1573 st->flags &= ~ST_EARLYWARN; 1574 break; 1575 1576 default: 1577 error = EINVAL; 1578 } 1579 break; 1580 } 1581 case MTIOCIEOT: 1582 case MTIOCEEOT: 1583 break; 1584 1585 case MTIOCRDSPOS: 1586 error = st_rdpos(st, 0, (u_int32_t *) arg); 1587 break; 1588 1589 case MTIOCRDHPOS: 1590 error = st_rdpos(st, 1, (u_int32_t *) arg); 1591 break; 1592 1593 case MTIOCSLOCATE: 1594 error = st_setpos(st, 0, (u_int32_t *) arg); 1595 break; 1596 1597 case MTIOCHLOCATE: 1598 error = st_setpos(st, 1, (u_int32_t *) arg); 1599 break; 1600 1601 1602 default: 1603 error = scsipi_do_ioctl(st->sc_periph, dev, cmd, arg, 1604 flag, l); 1605 break; 1606 } 1607 return (error); 1608 /*-----------------------------*/ 1609 try_new_value: 1610 /* 1611 * Check that the mode being asked for is aggreeable to the 1612 * drive. If not, put it back the way it was. 1613 * 1614 * If in control mode, we can make (persistent) mode changes 1615 * even if no medium is loaded (see st(4)). 1616 */ 1617 if ((STMODE(dev) != CTRL_MODE || (st->flags & ST_MOUNTED) != 0) && 1618 (error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 1619 /* put it back as it was */ 1620 aprint_error_dev(&st->sc_dev, "cannot set selected mode\n"); 1621 st->density = hold_density; 1622 st->blksize = hold_blksize; 1623 if (st->blksize) 1624 st->flags |= ST_FIXEDBLOCKS; 1625 else 1626 st->flags &= ~ST_FIXEDBLOCKS; 1627 return (error); 1628 } 1629 /* 1630 * As the drive liked it, if we are setting a new default, 1631 * set it into the structures as such. 1632 * 1633 * The means for deciding this are not finalised yet- but 1634 * if the device was opened in Control Mode, the values 1635 * are persistent now across mounts. 1636 */ 1637 if (STMODE(dev) == CTRL_MODE) { 1638 switch ((short) (mt->mt_op)) { 1639 case MTSETBSIZ: 1640 st->modes[dsty].blksize = st->blksize; 1641 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1642 break; 1643 case MTSETDNSTY: 1644 st->modes[dsty].density = st->density; 1645 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1646 break; 1647 } 1648 } 1649 return (0); 1650 } 1651 1652 /* 1653 * Do a synchronous read. 1654 */ 1655 static int 1656 st_read(struct st_softc *st, char *bf, int size, int flags) 1657 { 1658 struct scsi_rw_tape cmd; 1659 1660 /* 1661 * If it's a null transfer, return immediatly 1662 */ 1663 if (size == 0) 1664 return (0); 1665 memset(&cmd, 0, sizeof(cmd)); 1666 cmd.opcode = READ; 1667 if (st->flags & ST_FIXEDBLOCKS) { 1668 cmd.byte2 |= SRW_FIXED; 1669 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1670 cmd.len); 1671 } else 1672 _lto3b(size, cmd.len); 1673 return (scsipi_command(st->sc_periph, 1674 (void *)&cmd, sizeof(cmd), (void *)bf, size, 0, ST_IO_TIME, NULL, 1675 flags | XS_CTL_DATA_IN)); 1676 } 1677 1678 /* 1679 * issue an erase command 1680 */ 1681 static int 1682 st_erase(struct st_softc *st, int full, int flags) 1683 { 1684 int tmo; 1685 struct scsi_erase cmd; 1686 1687 /* 1688 * Full erase means set LONG bit in erase command, which asks 1689 * the drive to erase the entire unit. Without this bit, we're 1690 * asking the drive to write an erase gap. 1691 */ 1692 memset(&cmd, 0, sizeof(cmd)); 1693 cmd.opcode = ERASE; 1694 if (full) { 1695 cmd.byte2 = SE_LONG; 1696 tmo = ST_SPC_TIME; 1697 } else { 1698 tmo = ST_IO_TIME; 1699 } 1700 1701 /* 1702 * XXX We always do this asynchronously, for now, unless the device 1703 * has the ST_Q_ERASE_NOIMM quirk. How long should we wait if we 1704 * want to (eventually) to it synchronously? 1705 */ 1706 if ((st->quirks & ST_Q_ERASE_NOIMM) == 0) 1707 cmd.byte2 |= SE_IMMED; 1708 1709 return (scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1710 ST_RETRIES, tmo, NULL, flags)); 1711 } 1712 1713 /* 1714 * skip N blocks/filemarks/seq filemarks/eom 1715 */ 1716 static int 1717 st_space(struct st_softc *st, int number, u_int what, int flags) 1718 { 1719 struct scsi_space cmd; 1720 int error; 1721 1722 switch (what) { 1723 case SP_BLKS: 1724 if (st->flags & ST_PER_ACTION) { 1725 if (number > 0) { 1726 st->flags &= ~ST_PER_ACTION; 1727 return (EIO); 1728 } else if (number < 0) { 1729 if (st->flags & ST_AT_FILEMARK) { 1730 /* 1731 * Handling of ST_AT_FILEMARK 1732 * in st_space will fill in the 1733 * right file mark count. 1734 */ 1735 error = st_space(st, 0, SP_FILEMARKS, 1736 flags); 1737 if (error) 1738 return (error); 1739 } 1740 if (st->flags & ST_BLANK_READ) { 1741 st->flags &= ~ST_BLANK_READ; 1742 return (EIO); 1743 } 1744 st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); 1745 } 1746 } 1747 break; 1748 case SP_FILEMARKS: 1749 if (st->flags & ST_EIO_PENDING) { 1750 if (number > 0) { 1751 /* pretend we just discovered the error */ 1752 st->flags &= ~ST_EIO_PENDING; 1753 return (EIO); 1754 } else if (number < 0) { 1755 /* back away from the error */ 1756 st->flags &= ~ST_EIO_PENDING; 1757 } 1758 } 1759 if (st->flags & ST_AT_FILEMARK) { 1760 st->flags &= ~ST_AT_FILEMARK; 1761 number--; 1762 } 1763 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 1764 /* back away from unwritten tape */ 1765 st->flags &= ~ST_BLANK_READ; 1766 number++; /* XXX dubious */ 1767 } 1768 break; 1769 case SP_EOM: 1770 if (st->flags & ST_EOM_PENDING) { 1771 /* we're already there */ 1772 st->flags &= ~ST_EOM_PENDING; 1773 return (0); 1774 } 1775 if (st->flags & ST_EIO_PENDING) { 1776 /* pretend we just discovered the error */ 1777 st->flags &= ~ST_EIO_PENDING; 1778 return (EIO); 1779 } 1780 if (st->flags & ST_AT_FILEMARK) 1781 st->flags &= ~ST_AT_FILEMARK; 1782 break; 1783 } 1784 if (number == 0) 1785 return (0); 1786 1787 memset(&cmd, 0, sizeof(cmd)); 1788 cmd.opcode = SPACE; 1789 cmd.byte2 = what; 1790 _lto3b(number, cmd.number); 1791 1792 st->flags &= ~ST_POSUPDATED; 1793 st->last_ctl_resid = 0; 1794 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1795 0, ST_SPC_TIME, NULL, flags); 1796 1797 if (error == 0 && (st->flags & ST_POSUPDATED) == 0) { 1798 number = number - st->last_ctl_resid; 1799 if (what == SP_BLKS) { 1800 if (st->blkno != -1) { 1801 st->blkno += number; 1802 } 1803 } else if (what == SP_FILEMARKS) { 1804 if (st->fileno != -1) { 1805 st->fileno += number; 1806 if (number > 0) { 1807 st->blkno = 0; 1808 } else if (number < 0) { 1809 st->blkno = -1; 1810 } 1811 } 1812 } else if (what == SP_EOM) { 1813 /* 1814 * This loses us relative position. 1815 */ 1816 st->fileno = st->blkno = -1; 1817 } 1818 } 1819 return (error); 1820 } 1821 1822 /* 1823 * write N filemarks 1824 */ 1825 static int 1826 st_write_filemarks(struct st_softc *st, int number, int flags) 1827 { 1828 int error; 1829 struct scsi_write_filemarks cmd; 1830 1831 /* 1832 * It's hard to write a negative number of file marks. 1833 * Don't try. 1834 */ 1835 if (number < 0) 1836 return (EINVAL); 1837 switch (number) { 1838 case 0: /* really a command to sync the drive's buffers */ 1839 break; 1840 case 1: 1841 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 1842 st->flags &= ~ST_WRITTEN; 1843 else 1844 st->flags |= ST_FM_WRITTEN; 1845 st->flags &= ~ST_PER_ACTION; 1846 break; 1847 default: 1848 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 1849 } 1850 1851 memset(&cmd, 0, sizeof(cmd)); 1852 cmd.opcode = WRITE_FILEMARKS; 1853 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1854 cmd.byte2 = SR_IMMED; 1855 /* 1856 * The ATAPI Onstream DI-30 doesn't support writing filemarks, but 1857 * WRITE_FILEMARKS is still used to flush the buffer 1858 */ 1859 if ((st->quirks & ST_Q_NOFILEMARKS) == 0) 1860 _lto3b(number, cmd.number); 1861 1862 /* XXX WE NEED TO BE ABLE TO GET A RESIDIUAL XXX */ 1863 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1864 0, ST_IO_TIME * 4, NULL, flags); 1865 if (error == 0 && st->fileno != -1) { 1866 st->fileno += number; 1867 } 1868 return (error); 1869 } 1870 1871 /* 1872 * Make sure the right number of file marks is on tape if the 1873 * tape has been written. If the position argument is true, 1874 * leave the tape positioned where it was originally. 1875 * 1876 * nmarks returns the number of marks to skip (or, if position 1877 * true, which were skipped) to get back original position. 1878 */ 1879 static int 1880 st_check_eod(struct st_softc *st, boolean position, int *nmarks, int flags) 1881 { 1882 int error; 1883 1884 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 1885 default: 1886 *nmarks = 0; 1887 return (0); 1888 case ST_WRITTEN: 1889 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 1890 *nmarks = 1; 1891 break; 1892 case ST_WRITTEN | ST_2FM_AT_EOD: 1893 *nmarks = 2; 1894 } 1895 error = st_write_filemarks(st, *nmarks, flags); 1896 if (position && !error) 1897 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 1898 return (error); 1899 } 1900 1901 /* 1902 * load/unload/retension 1903 */ 1904 static int 1905 st_load(struct st_softc *st, u_int type, int flags) 1906 { 1907 int error; 1908 struct scsi_load cmd; 1909 1910 if (type != LD_LOAD) { 1911 int nmarks; 1912 1913 error = st_check_eod(st, FALSE, &nmarks, flags); 1914 if (error) { 1915 aprint_error_dev(&st->sc_dev, "failed to write closing filemarks at " 1916 "unload, errno=%d\n", error); 1917 return (error); 1918 } 1919 } 1920 if (st->quirks & ST_Q_IGNORE_LOADS) { 1921 if (type == LD_LOAD) { 1922 /* 1923 * If we ignore loads, at least we should try a rewind. 1924 */ 1925 return st_rewind(st, 0, flags); 1926 } 1927 /* otherwise, we should do what's asked of us */ 1928 } 1929 1930 memset(&cmd, 0, sizeof(cmd)); 1931 cmd.opcode = LOAD; 1932 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1933 cmd.byte2 = SR_IMMED; 1934 cmd.how = type; 1935 1936 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1937 ST_RETRIES, ST_SPC_TIME, NULL, flags); 1938 if (error) { 1939 aprint_error_dev(&st->sc_dev, "error %d in st_load (op %d)\n", 1940 error, type); 1941 } 1942 return (error); 1943 } 1944 1945 /* 1946 * Rewind the device 1947 */ 1948 static int 1949 st_rewind(struct st_softc *st, u_int immediate, int flags) 1950 { 1951 struct scsi_rewind cmd; 1952 int error; 1953 int nmarks; 1954 int timeout; 1955 1956 error = st_check_eod(st, FALSE, &nmarks, flags); 1957 if (error) { 1958 aprint_error_dev(&st->sc_dev, "failed to write closing filemarks at " 1959 "rewind, errno=%d\n", error); 1960 return (error); 1961 } 1962 st->flags &= ~ST_PER_ACTION; 1963 1964 /* If requestor asked for immediate response, set a short timeout */ 1965 timeout = immediate ? ST_CTL_TIME : ST_SPC_TIME; 1966 1967 /* 1968 * ATAPI tapes always need immediate to be set 1969 */ 1970 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1971 immediate = SR_IMMED; 1972 1973 memset(&cmd, 0, sizeof(cmd)); 1974 cmd.opcode = REWIND; 1975 cmd.byte2 = immediate; 1976 1977 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1978 ST_RETRIES, timeout, NULL, flags); 1979 if (error) { 1980 aprint_error_dev(&st->sc_dev, "error %d trying to rewind\n", 1981 error); 1982 /* lost position */ 1983 st->fileno = st->blkno = -1; 1984 } else { 1985 st->fileno = st->blkno = 0; 1986 } 1987 return (error); 1988 } 1989 1990 static int 1991 st_rdpos(struct st_softc *st, int hard, u_int32_t *blkptr) 1992 { 1993 int error; 1994 u_int8_t posdata[20]; 1995 struct scsi_tape_read_position cmd; 1996 1997 /* 1998 * We try and flush any buffered writes here if we were writing 1999 * and we're trying to get hardware block position. It eats 2000 * up performance substantially, but I'm wary of drive firmware. 2001 * 2002 * I think that *logical* block position is probably okay- 2003 * but hardware block position might have to wait for data 2004 * to hit media to be valid. Caveat Emptor. 2005 */ 2006 2007 if (hard && (st->flags & ST_WRITTEN)) { 2008 /* 2009 * First flush any pending writes... 2010 */ 2011 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 2012 /* 2013 * The latter case is for 'write protected' tapes 2014 * which are too stupid to recognize a zero count 2015 * for writing filemarks as a no-op. 2016 */ 2017 if (error != 0 && error != EACCES && error != EROFS) 2018 return (error); 2019 } 2020 2021 memset(&cmd, 0, sizeof(cmd)); 2022 memset(&posdata, 0, sizeof(posdata)); 2023 cmd.opcode = READ_POSITION; 2024 if (hard) 2025 cmd.byte1 = 1; 2026 2027 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 2028 (void *)&posdata, sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, 2029 XS_CTL_SILENT | XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); 2030 2031 if (error == 0) { 2032 #if 0 2033 printf("posdata:"); 2034 for (hard = 0; hard < sizeof(posdata); hard++) 2035 printf("%02x ", posdata[hard] & 0xff); 2036 printf("\n"); 2037 #endif 2038 if (posdata[0] & 0x4) /* Block Position Unknown */ 2039 error = EINVAL; 2040 else 2041 *blkptr = _4btol(&posdata[4]); 2042 } 2043 return (error); 2044 } 2045 2046 static int 2047 st_setpos(struct st_softc *st, int hard, u_int32_t *blkptr) 2048 { 2049 int error; 2050 struct scsi_tape_locate cmd; 2051 2052 /* 2053 * We used to try and flush any buffered writes here. 2054 * Now we push this onto user applications to either 2055 * flush the pending writes themselves (via a zero count 2056 * WRITE FILEMARKS command) or they can trust their tape 2057 * drive to do this correctly for them. 2058 * 2059 * There are very ugly performance limitations otherwise. 2060 */ 2061 2062 memset(&cmd, 0, sizeof(cmd)); 2063 cmd.opcode = LOCATE; 2064 if (hard) 2065 cmd.byte2 = 1 << 2; 2066 _lto4b(*blkptr, cmd.blkaddr); 2067 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 2068 ST_RETRIES, ST_SPC_TIME, NULL, 0); 2069 /* 2070 * Note file && block number position now unknown (if 2071 * these things ever start being maintained in this driver) 2072 */ 2073 st->fileno = st->blkno = -1; 2074 return (error); 2075 } 2076 2077 2078 /* 2079 * Look at the returned sense and act on the error and determine 2080 * the unix error number to pass back..., 0 (== report no error), 2081 * -1 = retry the operation, -2 continue error processing. 2082 */ 2083 static int 2084 st_interpret_sense(struct scsipi_xfer *xs) 2085 { 2086 struct scsipi_periph *periph = xs->xs_periph; 2087 struct scsi_sense_data *sense = &xs->sense.scsi_sense; 2088 struct buf *bp = xs->bp; 2089 struct st_softc *st = (void *)periph->periph_dev; 2090 int retval = EJUSTRETURN; 2091 int doprint = ((xs->xs_control & XS_CTL_SILENT) == 0); 2092 u_int8_t key; 2093 int32_t info; 2094 2095 /* 2096 * If it isn't a extended or extended/deferred error, let 2097 * the generic code handle it. 2098 */ 2099 if (SSD_RCODE(sense->response_code) != SSD_RCODE_CURRENT && 2100 SSD_RCODE(sense->response_code) != SSD_RCODE_DEFERRED) 2101 return (retval); 2102 2103 if (sense->response_code & SSD_RCODE_VALID) 2104 info = _4btol(sense->info); 2105 else 2106 info = (st->flags & ST_FIXEDBLOCKS) ? 2107 xs->datalen / st->blksize : xs->datalen; 2108 key = SSD_SENSE_KEY(sense->flags); 2109 st->mt_erreg = key; 2110 st->asc = sense->asc; 2111 st->ascq = sense->ascq; 2112 st->mt_resid = (short) info; 2113 2114 if (key == SKEY_NOT_READY && st->asc == 0x4 && st->ascq == 0x1) { 2115 /* Not Ready, Logical Unit Is in Process Of Becoming Ready */ 2116 if (!callout_pending(&periph->periph_callout)) 2117 scsipi_periph_freeze(periph, 1); 2118 callout_reset(&periph->periph_callout, 2119 hz, scsipi_periph_timed_thaw, periph); 2120 return (ERESTART); 2121 } 2122 2123 /* 2124 * If the device is not open yet, let generic handle 2125 */ 2126 if ((periph->periph_flags & PERIPH_OPEN) == 0) { 2127 return (retval); 2128 } 2129 2130 xs->resid = info; 2131 if (st->flags & ST_FIXEDBLOCKS) { 2132 if (bp) { 2133 xs->resid *= st->blksize; 2134 st->last_io_resid = xs->resid; 2135 } else { 2136 st->last_ctl_resid = xs->resid; 2137 } 2138 if (key == SKEY_VOLUME_OVERFLOW) { 2139 st->flags |= ST_EIO_PENDING; 2140 if (bp) 2141 bp->b_resid = xs->resid; 2142 } else if (sense->flags & SSD_EOM) { 2143 if ((st->flags & ST_EARLYWARN) == 0) 2144 st->flags |= ST_EIO_PENDING; 2145 st->flags |= ST_EOM_PENDING; 2146 if (bp) { 2147 #if 0 2148 bp->b_resid = xs->resid; 2149 #else 2150 /* 2151 * Grotesque as it seems, the few times 2152 * I've actually seen a non-zero resid, 2153 * the tape drive actually lied and had 2154 * written all the data! 2155 */ 2156 bp->b_resid = 0; 2157 #endif 2158 } 2159 } 2160 if (sense->flags & SSD_FILEMARK) { 2161 st->flags |= ST_AT_FILEMARK; 2162 if (bp) 2163 bp->b_resid = xs->resid; 2164 if (st->fileno != (daddr_t) -1) { 2165 st->fileno++; 2166 st->blkno = 0; 2167 st->flags |= ST_POSUPDATED; 2168 } 2169 } 2170 if (sense->flags & SSD_ILI) { 2171 st->flags |= ST_EIO_PENDING; 2172 if (bp) 2173 bp->b_resid = xs->resid; 2174 if (sense->response_code & SSD_RCODE_VALID && 2175 (xs->xs_control & XS_CTL_SILENT) == 0) 2176 aprint_error_dev(&st->sc_dev, "block wrong size, %d blocks " 2177 "residual\n", info); 2178 2179 /* 2180 * This quirk code helps the drive read 2181 * the first tape block, regardless of 2182 * format. That is required for these 2183 * drives to return proper MODE SENSE 2184 * information. 2185 */ 2186 if ((st->quirks & ST_Q_SENSE_HELP) && 2187 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 2188 st->blksize -= 512; 2189 else if ((st->flags & ST_POSUPDATED) == 0) { 2190 if (st->blkno != (daddr_t) -1) { 2191 st->blkno += 2192 (xs->datalen / st->blksize); 2193 st->flags |= ST_POSUPDATED; 2194 } 2195 } 2196 } 2197 /* 2198 * If data wanted and no data was transferred, do it immediately 2199 */ 2200 if (xs->datalen && xs->resid >= xs->datalen) { 2201 if (st->flags & ST_EIO_PENDING) 2202 return (EIO); 2203 if (st->flags & ST_AT_FILEMARK) { 2204 if (bp) 2205 bp->b_resid = xs->resid; 2206 return (0); 2207 } 2208 } 2209 } else { /* must be variable mode */ 2210 if (bp) { 2211 st->last_io_resid = xs->resid; 2212 } else { 2213 st->last_ctl_resid = xs->resid; 2214 } 2215 if (sense->flags & SSD_EOM) { 2216 /* 2217 * The current semantics of this 2218 * driver requires EOM detection 2219 * to return EIO unless early 2220 * warning detection is enabled 2221 * for variable mode (this is always 2222 * on for fixed block mode). 2223 */ 2224 if (st->flags & ST_EARLYWARN) { 2225 st->flags |= ST_EOM_PENDING; 2226 retval = 0; 2227 } else { 2228 retval = EIO; 2229 } 2230 2231 /* 2232 * If it's an unadorned EOM detection, 2233 * suppress printing an error. 2234 */ 2235 if (key == SKEY_NO_SENSE) { 2236 doprint = 0; 2237 } 2238 } else if (sense->flags & SSD_FILEMARK) { 2239 retval = 0; 2240 if (st->fileno != (daddr_t) -1) { 2241 st->fileno++; 2242 st->blkno = 0; 2243 st->flags |= ST_POSUPDATED; 2244 } 2245 } else if (sense->flags & SSD_ILI) { 2246 if (info < 0) { 2247 /* 2248 * The tape record was bigger than the read 2249 * we issued. 2250 */ 2251 if ((xs->xs_control & XS_CTL_SILENT) == 0) { 2252 aprint_error_dev(&st->sc_dev, 2253 "%d-byte tape record too big" 2254 " for %d-byte user buffer\n", 2255 xs->datalen - info, xs->datalen); 2256 } 2257 retval = EIO; 2258 } else { 2259 retval = 0; 2260 if (st->blkno != (daddr_t) -1) { 2261 st->blkno++; 2262 st->flags |= ST_POSUPDATED; 2263 } 2264 } 2265 } 2266 if (bp) 2267 bp->b_resid = info; 2268 } 2269 2270 #ifndef SCSIPI_DEBUG 2271 if (retval == 0 && key == SKEY_NO_SENSE) 2272 doprint = 0; 2273 #endif 2274 if (key == SKEY_BLANK_CHECK) { 2275 /* 2276 * This quirk code helps the drive read the 2277 * first tape block, regardless of format. That 2278 * is required for these drives to return proper 2279 * MODE SENSE information. 2280 */ 2281 if ((st->quirks & ST_Q_SENSE_HELP) && 2282 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 2283 /* still starting */ 2284 st->blksize -= 512; 2285 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 2286 st->flags |= ST_BLANK_READ; 2287 xs->resid = xs->datalen; 2288 if (bp) { 2289 bp->b_resid = xs->resid; 2290 /* return an EOF */ 2291 } 2292 retval = 0; 2293 /* lost position */ 2294 st->fileno = st->blkno = -1; 2295 } 2296 } 2297 2298 /* 2299 * If generic sense processing will continue, we should not 2300 * print sense info here. 2301 */ 2302 if (retval == EJUSTRETURN) 2303 doprint = 0; 2304 2305 if (doprint) { 2306 #ifdef SCSIVERBOSE 2307 scsipi_print_sense(xs, 0); 2308 #else 2309 scsipi_printaddr(periph); 2310 printf("Sense Key 0x%02x", key); 2311 if ((sense->response_code & SSD_RCODE_VALID) != 0) { 2312 switch (key) { 2313 case SKEY_NOT_READY: 2314 case SKEY_ILLEGAL_REQUEST: 2315 case SKEY_UNIT_ATTENTION: 2316 case SKEY_DATA_PROTECT: 2317 break; 2318 case SKEY_VOLUME_OVERFLOW: 2319 case SKEY_BLANK_CHECK: 2320 printf(", requested size: %d (decimal)", info); 2321 break; 2322 case SKEY_ABORTED_COMMAND: 2323 if (xs->xs_retries) 2324 printf(", retrying"); 2325 printf(", cmd 0x%x, info 0x%x", 2326 xs->cmd->opcode, info); 2327 break; 2328 default: 2329 printf(", info = %d (decimal)", info); 2330 } 2331 } 2332 if (sense->extra_len != 0) { 2333 int n; 2334 printf(", data ="); 2335 for (n = 0; n < sense->extra_len; n++) 2336 printf(" %02x", sense->csi[n]); 2337 } 2338 printf("\n"); 2339 #endif 2340 } 2341 return (retval); 2342 } 2343 2344 /* 2345 * The quirk here is that the drive returns some value to st_mode_sense 2346 * incorrectly until the tape has actually passed by the head. 2347 * 2348 * The method is to set the drive to large fixed-block state (user-specified 2349 * density and 1024-byte blocks), then read and rewind to get it to sense the 2350 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 2351 * work, as a last resort, try variable- length blocks. The result will be 2352 * the ability to do an accurate st_mode_sense. 2353 * 2354 * We know we can do a rewind because we just did a load, which implies rewind. 2355 * Rewind seems preferable to space backward if we have a virgin tape. 2356 * 2357 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 2358 * error processing, both part of st_interpret_sense. 2359 */ 2360 static int 2361 st_touch_tape(struct st_softc *st) 2362 { 2363 char *bf; 2364 int readsize; 2365 int error; 2366 2367 bf = malloc(1024, M_TEMP, M_NOWAIT); 2368 if (bf == NULL) 2369 return (ENOMEM); 2370 2371 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 2372 goto bad; 2373 2374 /* 2375 * If the block size is already known from the 2376 * sense data, use it. Else start probing at 1024. 2377 */ 2378 if (st->media_blksize > 0) 2379 st->blksize = st->media_blksize; 2380 else 2381 st->blksize = 1024; 2382 2383 do { 2384 switch (st->blksize) { 2385 case 512: 2386 case 1024: 2387 readsize = st->blksize; 2388 st->flags |= ST_FIXEDBLOCKS; 2389 break; 2390 default: 2391 readsize = 1; 2392 st->flags &= ~ST_FIXEDBLOCKS; 2393 } 2394 if ((error = st->ops(st, ST_OPS_MODESELECT, XS_CTL_SILENT)) 2395 != 0) { 2396 /* 2397 * The device did not agree with the proposed 2398 * block size. If we exhausted our options, 2399 * return failure, else try another. 2400 */ 2401 if (readsize == 1) 2402 goto bad; 2403 st->blksize -= 512; 2404 continue; 2405 } 2406 st_read(st, bf, readsize, XS_CTL_SILENT); /* XXX */ 2407 if ((error = st_rewind(st, 0, 0)) != 0) { 2408 bad: free(bf, M_TEMP); 2409 return (error); 2410 } 2411 } while (readsize != 1 && readsize > st->blksize); 2412 2413 free(bf, M_TEMP); 2414 return (0); 2415 } 2416 2417 static int 2418 stdump(dev_t dev, daddr_t blkno, void *va, 2419 size_t size) 2420 { 2421 2422 /* Not implemented. */ 2423 return (ENXIO); 2424 } 2425
Indexes created Sun Sep 28 16:09:52 GMT 2025