st.c revision 1.202.18.3
1 /* $NetBSD: st.c,v 1.202.18.3 2008/06/29 09:33:10 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 1.202.18.3 2008/06/29 09:33:10 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 st = device_lookup_private(&st_cd, unit); 568 if (st == NULL) 569 return (ENXIO); 570 571 stmode = STMODE(dev); 572 dsty = STDSTY(dev); 573 574 periph = st->sc_periph; 575 adapt = periph->periph_channel->chan_adapter; 576 577 SC_DEBUG(periph, SCSIPI_DB1, ("open: dev=0x%x (unit %d (of %d))\n", dev, 578 unit, st_cd.cd_ndevs)); 579 580 581 /* 582 * Only allow one at a time 583 */ 584 if (periph->periph_flags & PERIPH_OPEN) { 585 aprint_error_dev(&st->sc_dev, "already open\n"); 586 return (EBUSY); 587 } 588 589 if ((error = scsipi_adapter_addref(adapt)) != 0) 590 return (error); 591 592 /* 593 * clear any latched errors. 594 */ 595 st->mt_resid = 0; 596 st->mt_erreg = 0; 597 st->asc = 0; 598 st->ascq = 0; 599 600 /* 601 * Catch any unit attention errors. Be silent about this 602 * unless we're already mounted. We ignore media change 603 * if we're in control mode or not mounted yet. 604 */ 605 if ((st->flags & ST_MOUNTED) == 0 || stmode == CTRL_MODE) { 606 #ifdef SCSIDEBUG 607 sflags = XS_CTL_IGNORE_MEDIA_CHANGE; 608 #else 609 sflags = XS_CTL_SILENT|XS_CTL_IGNORE_MEDIA_CHANGE; 610 #endif 611 } else 612 sflags = 0; 613 614 /* 615 * If we're already mounted or we aren't configured for 616 * a mount delay, only try a test unit ready once. Otherwise, 617 * try up to ST_MOUNT_DELAY times with a rest interval of 618 * one second between each try. 619 */ 620 621 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0) { 622 ntries = 1; 623 } else { 624 ntries = ST_MOUNT_DELAY; 625 } 626 627 for (error = tries = 0; tries < ntries; tries++) { 628 int slpintr, oflags; 629 630 /* 631 * If we had no error, or we're opening the control mode 632 * device, we jump out right away. 633 */ 634 635 error = scsipi_test_unit_ready(periph, sflags); 636 if (error == 0 || stmode == CTRL_MODE) { 637 break; 638 } 639 640 /* 641 * We had an error. 642 * 643 * If we're already mounted or we aren't configured for 644 * a mount delay, or the error isn't a NOT READY error, 645 * skip to the error exit now. 646 */ 647 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0 || 648 (st->mt_key != SKEY_NOT_READY)) { 649 goto bad; 650 } 651 652 /* 653 * clear any latched errors. 654 */ 655 st->mt_resid = 0; 656 st->mt_erreg = 0; 657 st->asc = 0; 658 st->ascq = 0; 659 660 /* 661 * Fake that we have the device open so 662 * we block other apps from getting in. 663 */ 664 665 oflags = periph->periph_flags; 666 periph->periph_flags |= PERIPH_OPEN; 667 668 slpintr = tsleep(&lbolt, PUSER|PCATCH, "stload", 0); 669 670 periph->periph_flags = oflags; /* restore flags */ 671 if (slpintr) { 672 goto bad; 673 } 674 } 675 676 677 /* 678 * If the mode is 3 (e.g. minor = 3,7,11,15) then the device has 679 * been opened to set defaults and perform other, usually non-I/O 680 * related, operations. In this case, do a quick check to see 681 * whether the unit actually had a tape loaded (this will be known 682 * as to whether or not we got a NOT READY for the above 683 * unit attention). If a tape is there, go do a mount sequence. 684 */ 685 if (stmode == CTRL_MODE && st->mt_key == SKEY_NOT_READY) { 686 periph->periph_flags |= PERIPH_OPEN; 687 return (0); 688 } 689 690 /* 691 * If we get this far and had an error set, that means we failed 692 * to pass the 'test unit ready' test for the non-controlmode device, 693 * so we bounce the open. 694 */ 695 696 if (error) 697 return (error); 698 699 /* 700 * Else, we're now committed to saying we're open. 701 */ 702 703 periph->periph_flags |= PERIPH_OPEN; /* unit attn are now errors */ 704 705 /* 706 * If it's a different mode, or if the media has been 707 * invalidated, unmount the tape from the previous 708 * session but continue with open processing 709 */ 710 if (st->last_dsty != dsty || 711 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 712 st_unmount(st, NOEJECT); 713 714 /* 715 * If we are not mounted, then we should start a new 716 * mount session. 717 */ 718 if (!(st->flags & ST_MOUNTED)) { 719 if ((error = st_mount_tape(dev, flags)) != 0) 720 goto bad; 721 st->last_dsty = dsty; 722 } 723 if (!(st->quirks & ST_Q_NOPREVENT)) { 724 scsipi_prevent(periph, SPAMR_PREVENT_DT, 725 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 726 } 727 728 SC_DEBUG(periph, SCSIPI_DB2, ("open complete\n")); 729 return (0); 730 731 bad: 732 st_unmount(st, NOEJECT); 733 scsipi_adapter_delref(adapt); 734 periph->periph_flags &= ~PERIPH_OPEN; 735 return (error); 736 } 737 738 /* 739 * close the device.. only called if we are the LAST 740 * occurence of an open device 741 */ 742 static int 743 stclose(dev_t dev, int flags, int mode, struct lwp *l) 744 { 745 int stxx, error = 0; 746 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(dev)); 747 struct scsipi_periph *periph = st->sc_periph; 748 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 749 750 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("closing\n")); 751 752 /* 753 * Make sure that a tape opened in write-only mode will have 754 * file marks written on it when closed, even if not written to. 755 * 756 * This is for SUN compatibility. Actually, the Sun way of 757 * things is to: 758 * 759 * only write filemarks if there are fmks to be written and 760 * - open for write (possibly read/write) 761 * - the last operation was a write 762 * or: 763 * - opened for wronly 764 * - no data was written (including filemarks) 765 */ 766 767 stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); 768 if (((flags & FWRITE) && stxx == ST_WRITTEN) || 769 ((flags & O_ACCMODE) == FWRITE && stxx == 0)) { 770 int nm; 771 error = st_check_eod(st, FALSE, &nm, 0); 772 } 773 774 /* 775 * Allow robots to eject tape if needed. 776 */ 777 scsipi_prevent(periph, SPAMR_ALLOW, 778 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 779 780 switch (STMODE(dev)) { 781 case NORMAL_MODE: 782 st_unmount(st, NOEJECT); 783 break; 784 case NOREW_MODE: 785 case CTRL_MODE: 786 /* 787 * Leave mounted unless media seems to have been removed. 788 * 789 * Otherwise, if we're to terminate a tape with more than one 790 * filemark [ and because we're not rewinding here ], backspace 791 * one filemark so that later appends will see an unbroken 792 * sequence of: 793 * 794 * file - FMK - file - FMK ... file - FMK FMK (EOM) 795 */ 796 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 797 st_unmount(st, NOEJECT); 798 } else if (error == 0) { 799 /* 800 * ST_WRITTEN was preserved from above. 801 * 802 * All we need to know here is: 803 * 804 * Were we writing this tape and was the last 805 * operation a write? 806 * 807 * Are there supposed to be 2FM at EOD? 808 * 809 * If both statements are true, then we backspace 810 * one filemark. 811 */ 812 stxx |= (st->flags & ST_2FM_AT_EOD); 813 if ((flags & FWRITE) != 0 && 814 (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { 815 error = st_space(st, -1, SP_FILEMARKS, 0); 816 } 817 } 818 break; 819 case EJECT_MODE: 820 st_unmount(st, EJECT); 821 break; 822 } 823 824 scsipi_wait_drain(periph); 825 826 scsipi_adapter_delref(adapt); 827 periph->periph_flags &= ~PERIPH_OPEN; 828 829 return (error); 830 } 831 832 /* 833 * Start a new mount session. 834 * Copy in all the default parameters from the selected device mode. 835 * and try guess any that seem to be defaulted. 836 */ 837 static int 838 st_mount_tape(dev_t dev, int flags) 839 { 840 int unit; 841 u_int dsty; 842 struct st_softc *st; 843 struct scsipi_periph *periph; 844 int error = 0; 845 846 unit = STUNIT(dev); 847 dsty = STDSTY(dev); 848 st = device_lookup_private(&st_cd, unit); 849 periph = st->sc_periph; 850 851 if (st->flags & ST_MOUNTED) 852 return (0); 853 854 SC_DEBUG(periph, SCSIPI_DB1, ("mounting\n ")); 855 st->flags |= ST_NEW_MOUNT; 856 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 857 /* 858 * If the media is new, then make sure we give it a chance to 859 * to do a 'load' instruction. (We assume it is new.) 860 */ 861 if ((error = st_load(st, LD_LOAD, XS_CTL_SILENT)) != 0) 862 return (error); 863 /* 864 * Throw another dummy instruction to catch 865 * 'Unit attention' errors. Many drives give 866 * these after doing a Load instruction (with 867 * the MEDIUM MAY HAVE CHANGED asc/ascq). 868 */ 869 scsipi_test_unit_ready(periph, XS_CTL_SILENT); /* XXX */ 870 871 /* 872 * Some devices can't tell you much until they have been 873 * asked to look at the media. This quirk does this. 874 */ 875 if (st->quirks & ST_Q_SENSE_HELP) 876 if ((error = st_touch_tape(st)) != 0) 877 return (error); 878 /* 879 * Load the physical device parameters 880 * loads: blkmin, blkmax 881 */ 882 if ((error = st->ops(st, ST_OPS_RBL, 0)) != 0) 883 return (error); 884 /* 885 * Load the media dependent parameters 886 * includes: media_blksize,media_density,numblks 887 * As we have a tape in, it should be reflected here. 888 * If not you may need the "quirk" above. 889 */ 890 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 891 return (error); 892 /* 893 * If we have gained a permanent density from somewhere, 894 * then use it in preference to the one supplied by 895 * default by the driver. 896 */ 897 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 898 st->density = st->modes[dsty].density; 899 else 900 st->density = st->media_density; 901 /* 902 * If we have gained a permanent blocksize 903 * then use it in preference to the one supplied by 904 * default by the driver. 905 */ 906 st->flags &= ~ST_FIXEDBLOCKS; 907 if (st->modeflags[dsty] & 908 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 909 st->blksize = st->modes[dsty].blksize; 910 if (st->blksize) 911 st->flags |= ST_FIXEDBLOCKS; 912 } else { 913 if ((error = st_decide_mode(st, FALSE)) != 0) 914 return (error); 915 } 916 if ((error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 917 /* ATAPI will return ENODEV for this, and this may be OK */ 918 if (error != ENODEV) { 919 aprint_error_dev(&st->sc_dev, "cannot set selected mode\n"); 920 return (error); 921 } 922 } 923 st->flags &= ~ST_NEW_MOUNT; 924 st->flags |= ST_MOUNTED; 925 periph->periph_flags |= PERIPH_MEDIA_LOADED; /* move earlier? */ 926 st->blkno = st->fileno = (daddr_t) 0; 927 return (0); 928 } 929 930 /* 931 * End the present mount session. 932 * Rewind, and optionally eject the tape. 933 * Reset various flags to indicate that all new 934 * operations require another mount operation 935 */ 936 static void 937 st_unmount(struct st_softc *st, boolean eject) 938 { 939 struct scsipi_periph *periph = st->sc_periph; 940 int nmarks; 941 942 if ((st->flags & ST_MOUNTED) == 0) 943 return; 944 SC_DEBUG(periph, SCSIPI_DB1, ("unmounting\n")); 945 st_check_eod(st, FALSE, &nmarks, XS_CTL_IGNORE_NOT_READY); 946 st_rewind(st, 0, XS_CTL_IGNORE_NOT_READY); 947 948 /* 949 * Section 9.3.3 of the SCSI specs states that a device shall return 950 * the density value specified in the last succesfull MODE SELECT 951 * after an unload operation, in case it is not able to 952 * automatically determine the density of the new medium. 953 * 954 * So we instruct the device to use the default density, which will 955 * prevent the use of stale density values (in particular, 956 * in st_touch_tape(). 957 */ 958 st->density = 0; 959 if (st->ops(st, ST_OPS_MODESELECT, 0) != 0) { 960 aprint_error_dev(&st->sc_dev, "WARNING: cannot revert to default density\n"); 961 } 962 963 if (eject) { 964 if (!(st->quirks & ST_Q_NOPREVENT)) { 965 scsipi_prevent(periph, SPAMR_ALLOW, 966 XS_CTL_IGNORE_ILLEGAL_REQUEST | 967 XS_CTL_IGNORE_NOT_READY); 968 } 969 st_load(st, LD_UNLOAD, XS_CTL_IGNORE_NOT_READY); 970 st->blkno = st->fileno = (daddr_t) -1; 971 } else { 972 st->blkno = st->fileno = (daddr_t) 0; 973 } 974 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 975 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 976 } 977 978 /* 979 * Given all we know about the device, media, mode, 'quirks' and 980 * initial operation, make a decision as to how we should be set 981 * to run (regarding blocking and EOD marks) 982 */ 983 int 984 st_decide_mode(struct st_softc *st, boolean first_read) 985 { 986 987 SC_DEBUG(st->sc_periph, SCSIPI_DB2, ("starting block mode decision\n")); 988 989 /* 990 * If the drive can only handle fixed-length blocks and only at 991 * one size, perhaps we should just do that. 992 */ 993 if (st->blkmin && (st->blkmin == st->blkmax)) { 994 st->flags |= ST_FIXEDBLOCKS; 995 st->blksize = st->blkmin; 996 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 997 ("blkmin == blkmax of %d\n", st->blkmin)); 998 goto done; 999 } 1000 /* 1001 * If the tape density mandates (or even suggests) use of fixed 1002 * or variable-length blocks, comply. 1003 */ 1004 switch (st->density) { 1005 case HALFINCH_800: 1006 case HALFINCH_1600: 1007 case HALFINCH_6250: 1008 case DDS: 1009 st->flags &= ~ST_FIXEDBLOCKS; 1010 st->blksize = 0; 1011 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1012 ("density specified variable\n")); 1013 goto done; 1014 case QIC_11: 1015 case QIC_24: 1016 case QIC_120: 1017 case QIC_150: 1018 case QIC_525: 1019 case QIC_1320: 1020 case QIC_3095: 1021 case QIC_3220: 1022 st->flags |= ST_FIXEDBLOCKS; 1023 if (st->media_blksize > 0) 1024 st->blksize = st->media_blksize; 1025 else 1026 st->blksize = DEF_FIXED_BSIZE; 1027 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1028 ("density specified fixed\n")); 1029 goto done; 1030 } 1031 /* 1032 * If we're about to read the tape, perhaps we should choose 1033 * fixed or variable-length blocks and block size according to 1034 * what the drive found on the tape. 1035 */ 1036 if (first_read && 1037 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 1038 (st->media_blksize == DEF_FIXED_BSIZE) || 1039 (st->media_blksize == 1024))) { 1040 if (st->media_blksize > 0) 1041 st->flags |= ST_FIXEDBLOCKS; 1042 else 1043 st->flags &= ~ST_FIXEDBLOCKS; 1044 st->blksize = st->media_blksize; 1045 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1046 ("Used media_blksize of %d\n", st->media_blksize)); 1047 goto done; 1048 } 1049 /* 1050 * We're getting no hints from any direction. Choose variable- 1051 * length blocks arbitrarily. 1052 */ 1053 st->flags &= ~ST_FIXEDBLOCKS; 1054 st->blksize = 0; 1055 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1056 ("Give up and default to variable mode\n")); 1057 1058 done: 1059 /* 1060 * Decide whether or not to write two file marks to signify end- 1061 * of-data. Make the decision as a function of density. If 1062 * the decision is not to use a second file mark, the SCSI BLANK 1063 * CHECK condition code will be recognized as end-of-data when 1064 * first read. 1065 * (I think this should be a by-product of fixed/variable..julian) 1066 */ 1067 switch (st->density) { 1068 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 1069 case QIC_11: 1070 case QIC_24: 1071 case QIC_120: 1072 case QIC_150: 1073 case QIC_525: 1074 case QIC_1320: 1075 case QIC_3095: 1076 case QIC_3220: 1077 st->flags &= ~ST_2FM_AT_EOD; 1078 break; 1079 default: 1080 st->flags |= ST_2FM_AT_EOD; 1081 } 1082 return (0); 1083 } 1084 1085 /* 1086 * Actually translate the requested transfer into 1087 * one the physical driver can understand 1088 * The transfer is described by a buf and will include 1089 * only one physical transfer. 1090 */ 1091 static void 1092 ststrategy(struct buf *bp) 1093 { 1094 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(bp->b_dev)); 1095 int s; 1096 1097 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1098 ("ststrategy %d bytes @ blk %" PRId64 "\n", bp->b_bcount, bp->b_blkno)); 1099 /* 1100 * If it's a null transfer, return immediatly 1101 */ 1102 if (bp->b_bcount == 0) 1103 goto done; 1104 1105 /* If offset is negative, error */ 1106 if (bp->b_blkno < 0) { 1107 bp->b_error = EINVAL; 1108 goto done; 1109 } 1110 1111 /* 1112 * Odd sized request on fixed drives are verboten 1113 */ 1114 if (st->flags & ST_FIXEDBLOCKS) { 1115 if (bp->b_bcount % st->blksize) { 1116 aprint_error_dev(&st->sc_dev, "bad request, must be multiple of %d\n", 1117 st->blksize); 1118 bp->b_error = EIO; 1119 goto done; 1120 } 1121 } 1122 /* 1123 * as are out-of-range requests on variable drives. 1124 */ 1125 else if (bp->b_bcount < st->blkmin || 1126 (st->blkmax && bp->b_bcount > st->blkmax)) { 1127 aprint_error_dev(&st->sc_dev, "bad request, must be between %d and %d\n", 1128 st->blkmin, st->blkmax); 1129 bp->b_error = EIO; 1130 goto done; 1131 } 1132 s = splbio(); 1133 1134 /* 1135 * Place it in the queue of activities for this tape 1136 * at the end (a bit silly because we only have on user.. 1137 * (but it could fork())) 1138 */ 1139 BUFQ_PUT(st->buf_queue, bp); 1140 1141 /* 1142 * Tell the device to get going on the transfer if it's 1143 * not doing anything, otherwise just wait for completion 1144 * (All a bit silly if we're only allowing 1 open but..) 1145 */ 1146 ststart(st->sc_periph); 1147 1148 splx(s); 1149 return; 1150 done: 1151 /* 1152 * Correctly set the buf to indicate a completed xfer 1153 */ 1154 bp->b_resid = bp->b_bcount; 1155 biodone(bp); 1156 return; 1157 } 1158 1159 /* 1160 * ststart looks to see if there is a buf waiting for the device 1161 * and that the device is not already busy. If both are true, 1162 * It dequeues the buf and creates a scsi command to perform the 1163 * transfer required. The transfer request will call scsipi_done 1164 * on completion, which will in turn call this routine again 1165 * so that the next queued transfer is performed. 1166 * The bufs are queued by the strategy routine (ststrategy) 1167 * 1168 * This routine is also called after other non-queued requests 1169 * have been made of the scsi driver, to ensure that the queue 1170 * continues to be drained. 1171 * ststart() is called at splbio 1172 */ 1173 static void 1174 ststart(struct scsipi_periph *periph) 1175 { 1176 struct st_softc *st = (void *)periph->periph_dev; 1177 struct buf *bp; 1178 struct scsi_rw_tape cmd; 1179 struct scsipi_xfer *xs; 1180 int flags, error; 1181 1182 SC_DEBUG(periph, SCSIPI_DB2, ("ststart ")); 1183 /* 1184 * See if there is a buf to do and we are not already 1185 * doing one 1186 */ 1187 while (periph->periph_active < periph->periph_openings) { 1188 /* if a special awaits, let it proceed first */ 1189 if (periph->periph_flags & PERIPH_WAITING) { 1190 periph->periph_flags &= ~PERIPH_WAITING; 1191 wakeup((void *)periph); 1192 return; 1193 } 1194 1195 /* 1196 * If the device has been unmounted by the user 1197 * then throw away all requests until done. 1198 */ 1199 if (__predict_false((st->flags & ST_MOUNTED) == 0 || 1200 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0)) { 1201 if ((bp = BUFQ_GET(st->buf_queue)) != NULL) { 1202 /* make sure that one implies the other.. */ 1203 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 1204 bp->b_error = EIO; 1205 bp->b_resid = bp->b_bcount; 1206 biodone(bp); 1207 continue; 1208 } else { 1209 return; 1210 } 1211 } 1212 1213 if ((bp = BUFQ_PEEK(st->buf_queue)) == NULL) 1214 return; 1215 1216 iostat_busy(st->stats); 1217 1218 /* 1219 * only FIXEDBLOCK devices have pending I/O or space operations. 1220 */ 1221 if (st->flags & ST_FIXEDBLOCKS) { 1222 /* 1223 * If we are at a filemark but have not reported it yet 1224 * then we should report it now 1225 */ 1226 if (st->flags & ST_AT_FILEMARK) { 1227 if ((bp->b_flags & B_READ) == B_WRITE) { 1228 /* 1229 * Handling of ST_AT_FILEMARK in 1230 * st_space will fill in the right file 1231 * mark count. 1232 * Back up over filemark 1233 */ 1234 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1235 BUFQ_GET(st->buf_queue); 1236 bp->b_error = EIO; 1237 bp->b_resid = bp->b_bcount; 1238 biodone(bp); 1239 continue; 1240 } 1241 } else { 1242 BUFQ_GET(st->buf_queue); 1243 bp->b_resid = bp->b_bcount; 1244 bp->b_error = 0; 1245 st->flags &= ~ST_AT_FILEMARK; 1246 biodone(bp); 1247 continue; /* seek more work */ 1248 } 1249 } 1250 } 1251 /* 1252 * If we are at EOM but have not reported it 1253 * yet then we should report it now. 1254 */ 1255 if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { 1256 BUFQ_GET(st->buf_queue); 1257 bp->b_resid = bp->b_bcount; 1258 if (st->flags & ST_EIO_PENDING) 1259 bp->b_error = EIO; 1260 st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); 1261 biodone(bp); 1262 continue; /* seek more work */ 1263 } 1264 1265 /* 1266 * Fill out the scsi command 1267 */ 1268 memset(&cmd, 0, sizeof(cmd)); 1269 flags = XS_CTL_NOSLEEP | XS_CTL_ASYNC; 1270 if ((bp->b_flags & B_READ) == B_WRITE) { 1271 cmd.opcode = WRITE; 1272 st->flags &= ~ST_FM_WRITTEN; 1273 flags |= XS_CTL_DATA_OUT; 1274 } else { 1275 cmd.opcode = READ; 1276 flags |= XS_CTL_DATA_IN; 1277 } 1278 1279 /* 1280 * Handle "fixed-block-mode" tape drives by using the 1281 * block count instead of the length. 1282 */ 1283 if (st->flags & ST_FIXEDBLOCKS) { 1284 cmd.byte2 |= SRW_FIXED; 1285 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1286 } else 1287 _lto3b(bp->b_bcount, cmd.len); 1288 1289 /* 1290 * Clear 'position updated' indicator 1291 */ 1292 st->flags &= ~ST_POSUPDATED; 1293 1294 /* 1295 * go ask the adapter to do all this for us 1296 */ 1297 xs = scsipi_make_xs(periph, 1298 (struct scsipi_generic *)&cmd, sizeof(cmd), 1299 (u_char *)bp->b_data, bp->b_bcount, 1300 0, ST_IO_TIME, bp, flags); 1301 if (__predict_false(xs == NULL)) { 1302 /* 1303 * out of memory. Keep this buffer in the queue, and 1304 * retry later. 1305 */ 1306 callout_reset(&st->sc_callout, hz / 2, strestart, 1307 periph); 1308 return; 1309 } 1310 /* 1311 * need to dequeue the buffer before queuing the command, 1312 * because cdstart may be called recursively from the 1313 * HBA driver 1314 */ 1315 #ifdef DIAGNOSTIC 1316 if (BUFQ_GET(st->buf_queue) != bp) 1317 panic("ststart(): dequeued wrong buf"); 1318 #else 1319 BUFQ_GET(st->buf_queue); 1320 #endif 1321 error = scsipi_execute_xs(xs); 1322 /* with a scsipi_xfer preallocated, scsipi_command can't fail */ 1323 KASSERT(error == 0); 1324 } /* go back and see if we can cram more work in.. */ 1325 } 1326 1327 static void 1328 strestart(void *v) 1329 { 1330 int s = splbio(); 1331 ststart((struct scsipi_periph *)v); 1332 splx(s); 1333 } 1334 1335 1336 static void 1337 stdone(struct scsipi_xfer *xs, int error) 1338 { 1339 struct st_softc *st = (void *)xs->xs_periph->periph_dev; 1340 struct buf *bp = xs->bp; 1341 1342 if (bp) { 1343 bp->b_error = error; 1344 bp->b_resid = xs->resid; 1345 /* 1346 * buggy device ? A SDLT320 can report an info 1347 * field of 0x3de8000 on a Media Error/Write Error 1348 * for this CBD: 0x0a 00 00 80 00 00 1349 */ 1350 if (bp->b_resid > bp->b_bcount || bp->b_resid < 0) 1351 bp->b_resid = bp->b_bcount; 1352 1353 if ((bp->b_flags & B_READ) == B_WRITE) 1354 st->flags |= ST_WRITTEN; 1355 else 1356 st->flags &= ~ST_WRITTEN; 1357 1358 iostat_unbusy(st->stats, bp->b_bcount, 1359 ((bp->b_flags & B_READ) == B_READ)); 1360 1361 #if NRND > 0 1362 rnd_add_uint32(&st->rnd_source, bp->b_blkno); 1363 #endif 1364 1365 if ((st->flags & ST_POSUPDATED) == 0) { 1366 if (error) { 1367 st->fileno = st->blkno = -1; 1368 } else if (st->blkno != -1) { 1369 if (st->flags & ST_FIXEDBLOCKS) 1370 st->blkno += 1371 (bp->b_bcount / st->blksize); 1372 else 1373 st->blkno++; 1374 } 1375 } 1376 1377 biodone(bp); 1378 } 1379 } 1380 1381 static int 1382 stread(dev_t dev, struct uio *uio, int iomode) 1383 { 1384 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(dev)); 1385 1386 return (physio(ststrategy, NULL, dev, B_READ, 1387 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1388 } 1389 1390 static int 1391 stwrite(dev_t dev, struct uio *uio, int iomode) 1392 { 1393 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(dev)); 1394 1395 return (physio(ststrategy, NULL, dev, B_WRITE, 1396 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1397 } 1398 1399 /* 1400 * Perform special action on behalf of the user; 1401 * knows about the internals of this device 1402 */ 1403 static int 1404 stioctl(dev_t dev, u_long cmd, void *arg, int flag, struct lwp *l) 1405 { 1406 int error = 0; 1407 int unit; 1408 int number, nmarks, dsty; 1409 int flags; 1410 struct st_softc *st; 1411 int hold_blksize; 1412 u_int8_t hold_density; 1413 struct mtop *mt = (struct mtop *) arg; 1414 1415 /* 1416 * Find the device that the user is talking about 1417 */ 1418 flags = 0; /* give error messages, act on errors etc. */ 1419 unit = STUNIT(dev); 1420 dsty = STDSTY(dev); 1421 st = device_lookup_private(&st_cd, unit); 1422 hold_blksize = st->blksize; 1423 hold_density = st->density; 1424 1425 switch ((u_int) cmd) { 1426 1427 case MTIOCGET: { 1428 struct mtget *g = (struct mtget *) arg; 1429 /* 1430 * (to get the current state of READONLY) 1431 */ 1432 error = st->ops(st, ST_OPS_MODESENSE, XS_CTL_SILENT); 1433 if (error) { 1434 /* 1435 * Ignore the error if in control mode; 1436 * this is mandated by st(4). 1437 */ 1438 if (STMODE(dev) != CTRL_MODE) 1439 break; 1440 error = 0; 1441 } 1442 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("[ioctl: get status]\n")); 1443 memset(g, 0, sizeof(struct mtget)); 1444 g->mt_type = 0x7; /* Ultrix compat *//*? */ 1445 g->mt_blksiz = st->blksize; 1446 g->mt_density = st->density; 1447 g->mt_mblksiz[0] = st->modes[0].blksize; 1448 g->mt_mblksiz[1] = st->modes[1].blksize; 1449 g->mt_mblksiz[2] = st->modes[2].blksize; 1450 g->mt_mblksiz[3] = st->modes[3].blksize; 1451 g->mt_mdensity[0] = st->modes[0].density; 1452 g->mt_mdensity[1] = st->modes[1].density; 1453 g->mt_mdensity[2] = st->modes[2].density; 1454 g->mt_mdensity[3] = st->modes[3].density; 1455 g->mt_fileno = st->fileno; 1456 g->mt_blkno = st->blkno; 1457 if (st->flags & ST_READONLY) 1458 g->mt_dsreg |= MT_DS_RDONLY; 1459 if (st->flags & ST_MOUNTED) 1460 g->mt_dsreg |= MT_DS_MOUNTED; 1461 g->mt_resid = st->mt_resid; 1462 g->mt_erreg = st->mt_erreg; 1463 /* 1464 * clear latched errors. 1465 */ 1466 st->mt_resid = 0; 1467 st->mt_erreg = 0; 1468 st->asc = 0; 1469 st->ascq = 0; 1470 break; 1471 } 1472 case MTIOCTOP: { 1473 1474 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1475 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1476 mt->mt_count)); 1477 1478 /* compat: in U*x it is a short */ 1479 number = mt->mt_count; 1480 switch ((short) (mt->mt_op)) { 1481 case MTWEOF: /* write an end-of-file record */ 1482 error = st_write_filemarks(st, number, flags); 1483 break; 1484 case MTBSF: /* backward space file */ 1485 number = -number; 1486 case MTFSF: /* forward space file */ 1487 error = st_check_eod(st, FALSE, &nmarks, flags); 1488 if (!error) 1489 error = st_space(st, number - nmarks, 1490 SP_FILEMARKS, flags); 1491 break; 1492 case MTBSR: /* backward space record */ 1493 number = -number; 1494 case MTFSR: /* forward space record */ 1495 error = st_check_eod(st, true, &nmarks, flags); 1496 if (!error) 1497 error = st_space(st, number, SP_BLKS, flags); 1498 break; 1499 case MTREW: /* rewind */ 1500 error = st_rewind(st, 0, flags); 1501 break; 1502 case MTOFFL: /* rewind and put the drive offline */ 1503 st_unmount(st, EJECT); 1504 break; 1505 case MTNOP: /* no operation, sets status only */ 1506 break; 1507 case MTRETEN: /* retension the tape */ 1508 error = st_load(st, LD_RETENSION, flags); 1509 if (!error) 1510 error = st_load(st, LD_LOAD, flags); 1511 break; 1512 case MTEOM: /* forward space to end of media */ 1513 error = st_check_eod(st, FALSE, &nmarks, flags); 1514 if (!error) 1515 error = st_space(st, 1, SP_EOM, flags); 1516 break; 1517 case MTCACHE: /* enable controller cache */ 1518 st->flags &= ~ST_DONTBUFFER; 1519 goto try_new_value; 1520 case MTNOCACHE: /* disable controller cache */ 1521 st->flags |= ST_DONTBUFFER; 1522 goto try_new_value; 1523 case MTERASE: /* erase volume */ 1524 error = st_erase(st, number, flags); 1525 break; 1526 case MTSETBSIZ: /* Set block size for device */ 1527 #ifdef NOTYET 1528 if (!(st->flags & ST_NEW_MOUNT)) { 1529 uprintf("re-mount tape before changing blocksize"); 1530 error = EINVAL; 1531 break; 1532 } 1533 #endif 1534 if (number == 0) 1535 st->flags &= ~ST_FIXEDBLOCKS; 1536 else { 1537 if ((st->blkmin || st->blkmax) && 1538 (number < st->blkmin || 1539 number > st->blkmax)) { 1540 error = EINVAL; 1541 break; 1542 } 1543 st->flags |= ST_FIXEDBLOCKS; 1544 } 1545 st->blksize = number; 1546 st->flags |= ST_BLOCK_SET; /*XXX */ 1547 goto try_new_value; 1548 1549 case MTSETDNSTY: /* Set density for device and mode */ 1550 /* 1551 * Any number >= 0 and <= 0xff is legal. Numbers 1552 * above 0x80 are 'vendor unique'. 1553 */ 1554 if (number < 0 || number > 255) { 1555 error = EINVAL; 1556 break; 1557 } else 1558 st->density = number; 1559 goto try_new_value; 1560 1561 case MTCMPRESS: 1562 error = st->ops(st, (number == 0) ? 1563 ST_OPS_CMPRSS_OFF : ST_OPS_CMPRSS_ON, 1564 XS_CTL_SILENT); 1565 break; 1566 1567 case MTEWARN: 1568 if (number) 1569 st->flags |= ST_EARLYWARN; 1570 else 1571 st->flags &= ~ST_EARLYWARN; 1572 break; 1573 1574 default: 1575 error = EINVAL; 1576 } 1577 break; 1578 } 1579 case MTIOCIEOT: 1580 case MTIOCEEOT: 1581 break; 1582 1583 case MTIOCRDSPOS: 1584 error = st_rdpos(st, 0, (u_int32_t *) arg); 1585 break; 1586 1587 case MTIOCRDHPOS: 1588 error = st_rdpos(st, 1, (u_int32_t *) arg); 1589 break; 1590 1591 case MTIOCSLOCATE: 1592 error = st_setpos(st, 0, (u_int32_t *) arg); 1593 break; 1594 1595 case MTIOCHLOCATE: 1596 error = st_setpos(st, 1, (u_int32_t *) arg); 1597 break; 1598 1599 1600 default: 1601 error = scsipi_do_ioctl(st->sc_periph, dev, cmd, arg, 1602 flag, l); 1603 break; 1604 } 1605 return (error); 1606 /*-----------------------------*/ 1607 try_new_value: 1608 /* 1609 * Check that the mode being asked for is aggreeable to the 1610 * drive. If not, put it back the way it was. 1611 * 1612 * If in control mode, we can make (persistent) mode changes 1613 * even if no medium is loaded (see st(4)). 1614 */ 1615 if ((STMODE(dev) != CTRL_MODE || (st->flags & ST_MOUNTED) != 0) && 1616 (error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 1617 /* put it back as it was */ 1618 aprint_error_dev(&st->sc_dev, "cannot set selected mode\n"); 1619 st->density = hold_density; 1620 st->blksize = hold_blksize; 1621 if (st->blksize) 1622 st->flags |= ST_FIXEDBLOCKS; 1623 else 1624 st->flags &= ~ST_FIXEDBLOCKS; 1625 return (error); 1626 } 1627 /* 1628 * As the drive liked it, if we are setting a new default, 1629 * set it into the structures as such. 1630 * 1631 * The means for deciding this are not finalised yet- but 1632 * if the device was opened in Control Mode, the values 1633 * are persistent now across mounts. 1634 */ 1635 if (STMODE(dev) == CTRL_MODE) { 1636 switch ((short) (mt->mt_op)) { 1637 case MTSETBSIZ: 1638 st->modes[dsty].blksize = st->blksize; 1639 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1640 break; 1641 case MTSETDNSTY: 1642 st->modes[dsty].density = st->density; 1643 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1644 break; 1645 } 1646 } 1647 return (0); 1648 } 1649 1650 /* 1651 * Do a synchronous read. 1652 */ 1653 static int 1654 st_read(struct st_softc *st, char *bf, int size, int flags) 1655 { 1656 struct scsi_rw_tape cmd; 1657 1658 /* 1659 * If it's a null transfer, return immediatly 1660 */ 1661 if (size == 0) 1662 return (0); 1663 memset(&cmd, 0, sizeof(cmd)); 1664 cmd.opcode = READ; 1665 if (st->flags & ST_FIXEDBLOCKS) { 1666 cmd.byte2 |= SRW_FIXED; 1667 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1668 cmd.len); 1669 } else 1670 _lto3b(size, cmd.len); 1671 return (scsipi_command(st->sc_periph, 1672 (void *)&cmd, sizeof(cmd), (void *)bf, size, 0, ST_IO_TIME, NULL, 1673 flags | XS_CTL_DATA_IN)); 1674 } 1675 1676 /* 1677 * issue an erase command 1678 */ 1679 static int 1680 st_erase(struct st_softc *st, int full, int flags) 1681 { 1682 int tmo; 1683 struct scsi_erase cmd; 1684 1685 /* 1686 * Full erase means set LONG bit in erase command, which asks 1687 * the drive to erase the entire unit. Without this bit, we're 1688 * asking the drive to write an erase gap. 1689 */ 1690 memset(&cmd, 0, sizeof(cmd)); 1691 cmd.opcode = ERASE; 1692 if (full) { 1693 cmd.byte2 = SE_LONG; 1694 tmo = ST_SPC_TIME; 1695 } else { 1696 tmo = ST_IO_TIME; 1697 } 1698 1699 /* 1700 * XXX We always do this asynchronously, for now, unless the device 1701 * has the ST_Q_ERASE_NOIMM quirk. How long should we wait if we 1702 * want to (eventually) to it synchronously? 1703 */ 1704 if ((st->quirks & ST_Q_ERASE_NOIMM) == 0) 1705 cmd.byte2 |= SE_IMMED; 1706 1707 return (scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1708 ST_RETRIES, tmo, NULL, flags)); 1709 } 1710 1711 /* 1712 * skip N blocks/filemarks/seq filemarks/eom 1713 */ 1714 static int 1715 st_space(struct st_softc *st, int number, u_int what, int flags) 1716 { 1717 struct scsi_space cmd; 1718 int error; 1719 1720 switch (what) { 1721 case SP_BLKS: 1722 if (st->flags & ST_PER_ACTION) { 1723 if (number > 0) { 1724 st->flags &= ~ST_PER_ACTION; 1725 return (EIO); 1726 } else if (number < 0) { 1727 if (st->flags & ST_AT_FILEMARK) { 1728 /* 1729 * Handling of ST_AT_FILEMARK 1730 * in st_space will fill in the 1731 * right file mark count. 1732 */ 1733 error = st_space(st, 0, SP_FILEMARKS, 1734 flags); 1735 if (error) 1736 return (error); 1737 } 1738 if (st->flags & ST_BLANK_READ) { 1739 st->flags &= ~ST_BLANK_READ; 1740 return (EIO); 1741 } 1742 st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); 1743 } 1744 } 1745 break; 1746 case SP_FILEMARKS: 1747 if (st->flags & ST_EIO_PENDING) { 1748 if (number > 0) { 1749 /* pretend we just discovered the error */ 1750 st->flags &= ~ST_EIO_PENDING; 1751 return (EIO); 1752 } else if (number < 0) { 1753 /* back away from the error */ 1754 st->flags &= ~ST_EIO_PENDING; 1755 } 1756 } 1757 if (st->flags & ST_AT_FILEMARK) { 1758 st->flags &= ~ST_AT_FILEMARK; 1759 number--; 1760 } 1761 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 1762 /* back away from unwritten tape */ 1763 st->flags &= ~ST_BLANK_READ; 1764 number++; /* XXX dubious */ 1765 } 1766 break; 1767 case SP_EOM: 1768 if (st->flags & ST_EOM_PENDING) { 1769 /* we're already there */ 1770 st->flags &= ~ST_EOM_PENDING; 1771 return (0); 1772 } 1773 if (st->flags & ST_EIO_PENDING) { 1774 /* pretend we just discovered the error */ 1775 st->flags &= ~ST_EIO_PENDING; 1776 return (EIO); 1777 } 1778 if (st->flags & ST_AT_FILEMARK) 1779 st->flags &= ~ST_AT_FILEMARK; 1780 break; 1781 } 1782 if (number == 0) 1783 return (0); 1784 1785 memset(&cmd, 0, sizeof(cmd)); 1786 cmd.opcode = SPACE; 1787 cmd.byte2 = what; 1788 _lto3b(number, cmd.number); 1789 1790 st->flags &= ~ST_POSUPDATED; 1791 st->last_ctl_resid = 0; 1792 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1793 0, ST_SPC_TIME, NULL, flags); 1794 1795 if (error == 0 && (st->flags & ST_POSUPDATED) == 0) { 1796 number = number - st->last_ctl_resid; 1797 if (what == SP_BLKS) { 1798 if (st->blkno != -1) { 1799 st->blkno += number; 1800 } 1801 } else if (what == SP_FILEMARKS) { 1802 if (st->fileno != -1) { 1803 st->fileno += number; 1804 if (number > 0) { 1805 st->blkno = 0; 1806 } else if (number < 0) { 1807 st->blkno = -1; 1808 } 1809 } 1810 } else if (what == SP_EOM) { 1811 /* 1812 * This loses us relative position. 1813 */ 1814 st->fileno = st->blkno = -1; 1815 } 1816 } 1817 return (error); 1818 } 1819 1820 /* 1821 * write N filemarks 1822 */ 1823 static int 1824 st_write_filemarks(struct st_softc *st, int number, int flags) 1825 { 1826 int error; 1827 struct scsi_write_filemarks cmd; 1828 1829 /* 1830 * It's hard to write a negative number of file marks. 1831 * Don't try. 1832 */ 1833 if (number < 0) 1834 return (EINVAL); 1835 switch (number) { 1836 case 0: /* really a command to sync the drive's buffers */ 1837 break; 1838 case 1: 1839 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 1840 st->flags &= ~ST_WRITTEN; 1841 else 1842 st->flags |= ST_FM_WRITTEN; 1843 st->flags &= ~ST_PER_ACTION; 1844 break; 1845 default: 1846 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 1847 } 1848 1849 memset(&cmd, 0, sizeof(cmd)); 1850 cmd.opcode = WRITE_FILEMARKS; 1851 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1852 cmd.byte2 = SR_IMMED; 1853 /* 1854 * The ATAPI Onstream DI-30 doesn't support writing filemarks, but 1855 * WRITE_FILEMARKS is still used to flush the buffer 1856 */ 1857 if ((st->quirks & ST_Q_NOFILEMARKS) == 0) 1858 _lto3b(number, cmd.number); 1859 1860 /* XXX WE NEED TO BE ABLE TO GET A RESIDIUAL XXX */ 1861 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1862 0, ST_IO_TIME * 4, NULL, flags); 1863 if (error == 0 && st->fileno != -1) { 1864 st->fileno += number; 1865 } 1866 return (error); 1867 } 1868 1869 /* 1870 * Make sure the right number of file marks is on tape if the 1871 * tape has been written. If the position argument is true, 1872 * leave the tape positioned where it was originally. 1873 * 1874 * nmarks returns the number of marks to skip (or, if position 1875 * true, which were skipped) to get back original position. 1876 */ 1877 static int 1878 st_check_eod(struct st_softc *st, boolean position, int *nmarks, int flags) 1879 { 1880 int error; 1881 1882 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 1883 default: 1884 *nmarks = 0; 1885 return (0); 1886 case ST_WRITTEN: 1887 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 1888 *nmarks = 1; 1889 break; 1890 case ST_WRITTEN | ST_2FM_AT_EOD: 1891 *nmarks = 2; 1892 } 1893 error = st_write_filemarks(st, *nmarks, flags); 1894 if (position && !error) 1895 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 1896 return (error); 1897 } 1898 1899 /* 1900 * load/unload/retension 1901 */ 1902 static int 1903 st_load(struct st_softc *st, u_int type, int flags) 1904 { 1905 int error; 1906 struct scsi_load cmd; 1907 1908 if (type != LD_LOAD) { 1909 int nmarks; 1910 1911 error = st_check_eod(st, FALSE, &nmarks, flags); 1912 if (error) { 1913 aprint_error_dev(&st->sc_dev, "failed to write closing filemarks at " 1914 "unload, errno=%d\n", error); 1915 return (error); 1916 } 1917 } 1918 if (st->quirks & ST_Q_IGNORE_LOADS) { 1919 if (type == LD_LOAD) { 1920 /* 1921 * If we ignore loads, at least we should try a rewind. 1922 */ 1923 return st_rewind(st, 0, flags); 1924 } 1925 /* otherwise, we should do what's asked of us */ 1926 } 1927 1928 memset(&cmd, 0, sizeof(cmd)); 1929 cmd.opcode = LOAD; 1930 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1931 cmd.byte2 = SR_IMMED; 1932 cmd.how = type; 1933 1934 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1935 ST_RETRIES, ST_SPC_TIME, NULL, flags); 1936 if (error) { 1937 aprint_error_dev(&st->sc_dev, "error %d in st_load (op %d)\n", 1938 error, type); 1939 } 1940 return (error); 1941 } 1942 1943 /* 1944 * Rewind the device 1945 */ 1946 static int 1947 st_rewind(struct st_softc *st, u_int immediate, int flags) 1948 { 1949 struct scsi_rewind cmd; 1950 int error; 1951 int nmarks; 1952 int timeout; 1953 1954 error = st_check_eod(st, FALSE, &nmarks, flags); 1955 if (error) { 1956 aprint_error_dev(&st->sc_dev, "failed to write closing filemarks at " 1957 "rewind, errno=%d\n", error); 1958 return (error); 1959 } 1960 st->flags &= ~ST_PER_ACTION; 1961 1962 /* If requestor asked for immediate response, set a short timeout */ 1963 timeout = immediate ? ST_CTL_TIME : ST_SPC_TIME; 1964 1965 /* 1966 * ATAPI tapes always need immediate to be set 1967 */ 1968 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1969 immediate = SR_IMMED; 1970 1971 memset(&cmd, 0, sizeof(cmd)); 1972 cmd.opcode = REWIND; 1973 cmd.byte2 = immediate; 1974 1975 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1976 ST_RETRIES, timeout, NULL, flags); 1977 if (error) { 1978 aprint_error_dev(&st->sc_dev, "error %d trying to rewind\n", 1979 error); 1980 /* lost position */ 1981 st->fileno = st->blkno = -1; 1982 } else { 1983 st->fileno = st->blkno = 0; 1984 } 1985 return (error); 1986 } 1987 1988 static int 1989 st_rdpos(struct st_softc *st, int hard, u_int32_t *blkptr) 1990 { 1991 int error; 1992 u_int8_t posdata[20]; 1993 struct scsi_tape_read_position cmd; 1994 1995 /* 1996 * We try and flush any buffered writes here if we were writing 1997 * and we're trying to get hardware block position. It eats 1998 * up performance substantially, but I'm wary of drive firmware. 1999 * 2000 * I think that *logical* block position is probably okay- 2001 * but hardware block position might have to wait for data 2002 * to hit media to be valid. Caveat Emptor. 2003 */ 2004 2005 if (hard && (st->flags & ST_WRITTEN)) { 2006 /* 2007 * First flush any pending writes... 2008 */ 2009 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 2010 /* 2011 * The latter case is for 'write protected' tapes 2012 * which are too stupid to recognize a zero count 2013 * for writing filemarks as a no-op. 2014 */ 2015 if (error != 0 && error != EACCES && error != EROFS) 2016 return (error); 2017 } 2018 2019 memset(&cmd, 0, sizeof(cmd)); 2020 memset(&posdata, 0, sizeof(posdata)); 2021 cmd.opcode = READ_POSITION; 2022 if (hard) 2023 cmd.byte1 = 1; 2024 2025 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 2026 (void *)&posdata, sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, 2027 XS_CTL_SILENT | XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); 2028 2029 if (error == 0) { 2030 #if 0 2031 printf("posdata:"); 2032 for (hard = 0; hard < sizeof(posdata); hard++) 2033 printf("%02x ", posdata[hard] & 0xff); 2034 printf("\n"); 2035 #endif 2036 if (posdata[0] & 0x4) /* Block Position Unknown */ 2037 error = EINVAL; 2038 else 2039 *blkptr = _4btol(&posdata[4]); 2040 } 2041 return (error); 2042 } 2043 2044 static int 2045 st_setpos(struct st_softc *st, int hard, u_int32_t *blkptr) 2046 { 2047 int error; 2048 struct scsi_tape_locate cmd; 2049 2050 /* 2051 * We used to try and flush any buffered writes here. 2052 * Now we push this onto user applications to either 2053 * flush the pending writes themselves (via a zero count 2054 * WRITE FILEMARKS command) or they can trust their tape 2055 * drive to do this correctly for them. 2056 * 2057 * There are very ugly performance limitations otherwise. 2058 */ 2059 2060 memset(&cmd, 0, sizeof(cmd)); 2061 cmd.opcode = LOCATE; 2062 if (hard) 2063 cmd.byte2 = 1 << 2; 2064 _lto4b(*blkptr, cmd.blkaddr); 2065 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 2066 ST_RETRIES, ST_SPC_TIME, NULL, 0); 2067 /* 2068 * Note file && block number position now unknown (if 2069 * these things ever start being maintained in this driver) 2070 */ 2071 st->fileno = st->blkno = -1; 2072 return (error); 2073 } 2074 2075 2076 /* 2077 * Look at the returned sense and act on the error and determine 2078 * the unix error number to pass back..., 0 (== report no error), 2079 * -1 = retry the operation, -2 continue error processing. 2080 */ 2081 static int 2082 st_interpret_sense(struct scsipi_xfer *xs) 2083 { 2084 struct scsipi_periph *periph = xs->xs_periph; 2085 struct scsi_sense_data *sense = &xs->sense.scsi_sense; 2086 struct buf *bp = xs->bp; 2087 struct st_softc *st = (void *)periph->periph_dev; 2088 int retval = EJUSTRETURN; 2089 int doprint = ((xs->xs_control & XS_CTL_SILENT) == 0); 2090 u_int8_t key; 2091 int32_t info; 2092 2093 /* 2094 * If it isn't a extended or extended/deferred error, let 2095 * the generic code handle it. 2096 */ 2097 if (SSD_RCODE(sense->response_code) != SSD_RCODE_CURRENT && 2098 SSD_RCODE(sense->response_code) != SSD_RCODE_DEFERRED) 2099 return (retval); 2100 2101 if (sense->response_code & SSD_RCODE_VALID) 2102 info = _4btol(sense->info); 2103 else 2104 info = (st->flags & ST_FIXEDBLOCKS) ? 2105 xs->datalen / st->blksize : xs->datalen; 2106 key = SSD_SENSE_KEY(sense->flags); 2107 st->mt_erreg = key; 2108 st->asc = sense->asc; 2109 st->ascq = sense->ascq; 2110 st->mt_resid = (short) info; 2111 2112 if (key == SKEY_NOT_READY && st->asc == 0x4 && st->ascq == 0x1) { 2113 /* Not Ready, Logical Unit Is in Process Of Becoming Ready */ 2114 if (!callout_pending(&periph->periph_callout)) 2115 scsipi_periph_freeze(periph, 1); 2116 callout_reset(&periph->periph_callout, 2117 hz, scsipi_periph_timed_thaw, periph); 2118 return (ERESTART); 2119 } 2120 2121 /* 2122 * If the device is not open yet, let generic handle 2123 */ 2124 if ((periph->periph_flags & PERIPH_OPEN) == 0) { 2125 return (retval); 2126 } 2127 2128 xs->resid = info; 2129 if (st->flags & ST_FIXEDBLOCKS) { 2130 if (bp) { 2131 xs->resid *= st->blksize; 2132 st->last_io_resid = xs->resid; 2133 } else { 2134 st->last_ctl_resid = xs->resid; 2135 } 2136 if (key == SKEY_VOLUME_OVERFLOW) { 2137 st->flags |= ST_EIO_PENDING; 2138 if (bp) 2139 bp->b_resid = xs->resid; 2140 } else if (sense->flags & SSD_EOM) { 2141 if ((st->flags & ST_EARLYWARN) == 0) 2142 st->flags |= ST_EIO_PENDING; 2143 st->flags |= ST_EOM_PENDING; 2144 if (bp) { 2145 #if 0 2146 bp->b_resid = xs->resid; 2147 #else 2148 /* 2149 * Grotesque as it seems, the few times 2150 * I've actually seen a non-zero resid, 2151 * the tape drive actually lied and had 2152 * written all the data! 2153 */ 2154 bp->b_resid = 0; 2155 #endif 2156 } 2157 } 2158 if (sense->flags & SSD_FILEMARK) { 2159 st->flags |= ST_AT_FILEMARK; 2160 if (bp) 2161 bp->b_resid = xs->resid; 2162 if (st->fileno != (daddr_t) -1) { 2163 st->fileno++; 2164 st->blkno = 0; 2165 st->flags |= ST_POSUPDATED; 2166 } 2167 } 2168 if (sense->flags & SSD_ILI) { 2169 st->flags |= ST_EIO_PENDING; 2170 if (bp) 2171 bp->b_resid = xs->resid; 2172 if (sense->response_code & SSD_RCODE_VALID && 2173 (xs->xs_control & XS_CTL_SILENT) == 0) 2174 aprint_error_dev(&st->sc_dev, "block wrong size, %d blocks " 2175 "residual\n", info); 2176 2177 /* 2178 * This quirk code helps the drive read 2179 * the first tape block, regardless of 2180 * format. That is required for these 2181 * drives to return proper MODE SENSE 2182 * information. 2183 */ 2184 if ((st->quirks & ST_Q_SENSE_HELP) && 2185 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 2186 st->blksize -= 512; 2187 else if ((st->flags & ST_POSUPDATED) == 0) { 2188 if (st->blkno != (daddr_t) -1) { 2189 st->blkno += 2190 (xs->datalen / st->blksize); 2191 st->flags |= ST_POSUPDATED; 2192 } 2193 } 2194 } 2195 /* 2196 * If data wanted and no data was transferred, do it immediately 2197 */ 2198 if (xs->datalen && xs->resid >= xs->datalen) { 2199 if (st->flags & ST_EIO_PENDING) 2200 return (EIO); 2201 if (st->flags & ST_AT_FILEMARK) { 2202 if (bp) 2203 bp->b_resid = xs->resid; 2204 return (0); 2205 } 2206 } 2207 } else { /* must be variable mode */ 2208 if (bp) { 2209 st->last_io_resid = xs->resid; 2210 } else { 2211 st->last_ctl_resid = xs->resid; 2212 } 2213 if (sense->flags & SSD_EOM) { 2214 /* 2215 * The current semantics of this 2216 * driver requires EOM detection 2217 * to return EIO unless early 2218 * warning detection is enabled 2219 * for variable mode (this is always 2220 * on for fixed block mode). 2221 */ 2222 if (st->flags & ST_EARLYWARN) { 2223 st->flags |= ST_EOM_PENDING; 2224 retval = 0; 2225 } else { 2226 retval = EIO; 2227 } 2228 2229 /* 2230 * If it's an unadorned EOM detection, 2231 * suppress printing an error. 2232 */ 2233 if (key == SKEY_NO_SENSE) { 2234 doprint = 0; 2235 } 2236 } else if (sense->flags & SSD_FILEMARK) { 2237 retval = 0; 2238 if (st->fileno != (daddr_t) -1) { 2239 st->fileno++; 2240 st->blkno = 0; 2241 st->flags |= ST_POSUPDATED; 2242 } 2243 } else if (sense->flags & SSD_ILI) { 2244 if (info < 0) { 2245 /* 2246 * The tape record was bigger than the read 2247 * we issued. 2248 */ 2249 if ((xs->xs_control & XS_CTL_SILENT) == 0) { 2250 aprint_error_dev(&st->sc_dev, 2251 "%d-byte tape record too big" 2252 " for %d-byte user buffer\n", 2253 xs->datalen - info, xs->datalen); 2254 } 2255 retval = EIO; 2256 } else { 2257 retval = 0; 2258 if (st->blkno != (daddr_t) -1) { 2259 st->blkno++; 2260 st->flags |= ST_POSUPDATED; 2261 } 2262 } 2263 } 2264 if (bp) 2265 bp->b_resid = info; 2266 } 2267 2268 #ifndef SCSIPI_DEBUG 2269 if (retval == 0 && key == SKEY_NO_SENSE) 2270 doprint = 0; 2271 #endif 2272 if (key == SKEY_BLANK_CHECK) { 2273 /* 2274 * This quirk code helps the drive read the 2275 * first tape block, regardless of format. That 2276 * is required for these drives to return proper 2277 * MODE SENSE information. 2278 */ 2279 if ((st->quirks & ST_Q_SENSE_HELP) && 2280 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 2281 /* still starting */ 2282 st->blksize -= 512; 2283 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 2284 st->flags |= ST_BLANK_READ; 2285 xs->resid = xs->datalen; 2286 if (bp) { 2287 bp->b_resid = xs->resid; 2288 /* return an EOF */ 2289 } 2290 retval = 0; 2291 /* lost position */ 2292 st->fileno = st->blkno = -1; 2293 } 2294 } 2295 2296 /* 2297 * If generic sense processing will continue, we should not 2298 * print sense info here. 2299 */ 2300 if (retval == EJUSTRETURN) 2301 doprint = 0; 2302 2303 if (doprint) { 2304 #ifdef SCSIVERBOSE 2305 scsipi_print_sense(xs, 0); 2306 #else 2307 scsipi_printaddr(periph); 2308 printf("Sense Key 0x%02x", key); 2309 if ((sense->response_code & SSD_RCODE_VALID) != 0) { 2310 switch (key) { 2311 case SKEY_NOT_READY: 2312 case SKEY_ILLEGAL_REQUEST: 2313 case SKEY_UNIT_ATTENTION: 2314 case SKEY_DATA_PROTECT: 2315 break; 2316 case SKEY_VOLUME_OVERFLOW: 2317 case SKEY_BLANK_CHECK: 2318 printf(", requested size: %d (decimal)", info); 2319 break; 2320 case SKEY_ABORTED_COMMAND: 2321 if (xs->xs_retries) 2322 printf(", retrying"); 2323 printf(", cmd 0x%x, info 0x%x", 2324 xs->cmd->opcode, info); 2325 break; 2326 default: 2327 printf(", info = %d (decimal)", info); 2328 } 2329 } 2330 if (sense->extra_len != 0) { 2331 int n; 2332 printf(", data ="); 2333 for (n = 0; n < sense->extra_len; n++) 2334 printf(" %02x", sense->csi[n]); 2335 } 2336 printf("\n"); 2337 #endif 2338 } 2339 return (retval); 2340 } 2341 2342 /* 2343 * The quirk here is that the drive returns some value to st_mode_sense 2344 * incorrectly until the tape has actually passed by the head. 2345 * 2346 * The method is to set the drive to large fixed-block state (user-specified 2347 * density and 1024-byte blocks), then read and rewind to get it to sense the 2348 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 2349 * work, as a last resort, try variable- length blocks. The result will be 2350 * the ability to do an accurate st_mode_sense. 2351 * 2352 * We know we can do a rewind because we just did a load, which implies rewind. 2353 * Rewind seems preferable to space backward if we have a virgin tape. 2354 * 2355 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 2356 * error processing, both part of st_interpret_sense. 2357 */ 2358 static int 2359 st_touch_tape(struct st_softc *st) 2360 { 2361 char *bf; 2362 int readsize; 2363 int error; 2364 2365 bf = malloc(1024, M_TEMP, M_NOWAIT); 2366 if (bf == NULL) 2367 return (ENOMEM); 2368 2369 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 2370 goto bad; 2371 2372 /* 2373 * If the block size is already known from the 2374 * sense data, use it. Else start probing at 1024. 2375 */ 2376 if (st->media_blksize > 0) 2377 st->blksize = st->media_blksize; 2378 else 2379 st->blksize = 1024; 2380 2381 do { 2382 switch (st->blksize) { 2383 case 512: 2384 case 1024: 2385 readsize = st->blksize; 2386 st->flags |= ST_FIXEDBLOCKS; 2387 break; 2388 default: 2389 readsize = 1; 2390 st->flags &= ~ST_FIXEDBLOCKS; 2391 } 2392 if ((error = st->ops(st, ST_OPS_MODESELECT, XS_CTL_SILENT)) 2393 != 0) { 2394 /* 2395 * The device did not agree with the proposed 2396 * block size. If we exhausted our options, 2397 * return failure, else try another. 2398 */ 2399 if (readsize == 1) 2400 goto bad; 2401 st->blksize -= 512; 2402 continue; 2403 } 2404 st_read(st, bf, readsize, XS_CTL_SILENT); /* XXX */ 2405 if ((error = st_rewind(st, 0, 0)) != 0) { 2406 bad: free(bf, M_TEMP); 2407 return (error); 2408 } 2409 } while (readsize != 1 && readsize > st->blksize); 2410 2411 free(bf, M_TEMP); 2412 return (0); 2413 } 2414 2415 static int 2416 stdump(dev_t dev, daddr_t blkno, void *va, 2417 size_t size) 2418 { 2419 2420 /* Not implemented. */ 2421 return (ENXIO); 2422 } 2423
Indexes created Sat Sep 27 14:09:57 GMT 2025