st.c revision 1.186.6.1
1 /* $NetBSD: st.c,v 1.186.6.1 2006/02/04 14:03:58 simonb 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Originally written by Julian Elischer (julian (at) tfs.com) 41 * for TRW Financial Systems for use under the MACH(2.5) operating system. 42 * 43 * TRW Financial Systems, in accordance with their agreement with Carnegie 44 * Mellon University, makes this software available to CMU to distribute 45 * or use in any manner that they see fit as long as this message is kept with 46 * the software. For this reason TFS also grants any other persons or 47 * organisations permission to use or modify this software. 48 * 49 * TFS supplies this software to be publicly redistributed 50 * on the understanding that TFS is not responsible for the correct 51 * functioning of this software in any circumstances. 52 * 53 * Ported to run under 386BSD by Julian Elischer (julian (at) tfs.com) Sept 1992 54 * major changes by Julian Elischer (julian (at) jules.dialix.oz.au) May 1993 55 * 56 * A lot of rewhacking done by mjacob (mjacob (at) nas.nasa.gov). 57 */ 58 59 #include <sys/cdefs.h> 60 __KERNEL_RCSID(0, "$NetBSD: st.c,v 1.186.6.1 2006/02/04 14:03:58 simonb Exp $"); 61 62 #include "opt_scsi.h" 63 64 #include <sys/param.h> 65 #include <sys/systm.h> 66 #include <sys/fcntl.h> 67 #include <sys/errno.h> 68 #include <sys/ioctl.h> 69 #include <sys/malloc.h> 70 #include <sys/buf.h> 71 #include <sys/bufq.h> 72 #include <sys/proc.h> 73 #include <sys/user.h> 74 #include <sys/mtio.h> 75 #include <sys/device.h> 76 #include <sys/conf.h> 77 #include <sys/kernel.h> 78 #include <sys/vnode.h> 79 #include <sys/tape.h> 80 #include <sys/sysctl.h> 81 82 #include <dev/scsipi/scsi_spc.h> 83 #include <dev/scsipi/scsipi_all.h> 84 #include <dev/scsipi/scsi_all.h> 85 #include <dev/scsipi/scsi_tape.h> 86 #include <dev/scsipi/scsipiconf.h> 87 #include <dev/scsipi/scsipi_base.h> 88 #include <dev/scsipi/stvar.h> 89 90 /* Defines for device specific stuff */ 91 #define DEF_FIXED_BSIZE 512 92 93 #define STMODE(z) ( minor(z) & 0x03) 94 #define STDSTY(z) ((minor(z) >> 2) & 0x03) 95 #define STUNIT(z) ((minor(z) >> 4) ) 96 #define STNMINOR 16 97 98 #define NORMAL_MODE 0 99 #define NOREW_MODE 1 100 #define EJECT_MODE 2 101 #define CTRL_MODE 3 102 103 #define FALSE 0 104 #define TRUE 1 105 106 #ifndef ST_MOUNT_DELAY 107 #define ST_MOUNT_DELAY 0 108 #endif 109 110 struct tape * 111 drive_attach(char *name); 112 113 static dev_type_open(stopen); 114 static dev_type_close(stclose); 115 static dev_type_read(stread); 116 static dev_type_write(stwrite); 117 static dev_type_ioctl(stioctl); 118 static dev_type_strategy(ststrategy); 119 static dev_type_dump(stdump); 120 121 const struct bdevsw st_bdevsw = { 122 stopen, stclose, ststrategy, stioctl, stdump, nosize, D_TAPE 123 }; 124 125 const struct cdevsw st_cdevsw = { 126 stopen, stclose, stread, stwrite, stioctl, 127 nostop, notty, nopoll, nommap, nokqfilter, D_TAPE 128 }; 129 130 /* 131 * Define various devices that we know mis-behave in some way, 132 * and note how they are bad, so we can correct for them 133 */ 134 135 static const struct st_quirk_inquiry_pattern st_quirk_patterns[] = { 136 {{T_SEQUENTIAL, T_REMOV, 137 " ", " ", " "}, {0, 0, { 138 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 139 {ST_Q_FORCE_BLKSIZE, 512, QIC_24}, /* minor 4-7 */ 140 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_1600}, /* minor 8-11 */ 141 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_6250} /* minor 12-15 */ 142 }}}, 143 {{T_SEQUENTIAL, T_REMOV, 144 "TANDBERG", " TDC 3600 ", ""}, {0, 12, { 145 {0, 0, 0}, /* minor 0-3 */ 146 {ST_Q_FORCE_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 147 {0, 0, QIC_150}, /* minor 8-11 */ 148 {0, 0, QIC_120} /* minor 12-15 */ 149 }}}, 150 {{T_SEQUENTIAL, T_REMOV, 151 "TANDBERG", " TDC 3800 ", ""}, {0, 0, { 152 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 153 {0, 0, QIC_525}, /* minor 4-7 */ 154 {0, 0, QIC_150}, /* minor 8-11 */ 155 {0, 0, QIC_120} /* minor 12-15 */ 156 }}}, 157 {{T_SEQUENTIAL, T_REMOV, 158 "TANDBERG", " SLR5 4/8GB ", ""}, {0, 0, { 159 {ST_Q_FORCE_BLKSIZE, 1024, 0}, /* minor 0-3 */ 160 {0, 0, 0}, /* minor 4-7 */ 161 {0, 0, 0}, /* minor 8-11 */ 162 {0, 0, 0} /* minor 12-15 */ 163 }}}, 164 /* 165 * lacking a manual for the 4200, it's not clear what the 166 * specific density codes should be- the device is a 2.5GB 167 * capable QIC drive, those density codes aren't readily 168 * availabel. The 'default' will just have to do. 169 */ 170 {{T_SEQUENTIAL, T_REMOV, 171 "TANDBERG", " TDC 4200 ", ""}, {0, 0, { 172 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 173 {0, 0, QIC_525}, /* minor 4-7 */ 174 {0, 0, QIC_150}, /* minor 8-11 */ 175 {0, 0, QIC_120} /* minor 12-15 */ 176 }}}, 177 /* 178 * At least -005 and -007 need this. I'll assume they all do unless I 179 * hear otherwise. - mycroft, 31MAR1994 180 */ 181 {{T_SEQUENTIAL, T_REMOV, 182 "ARCHIVE ", "VIPER 2525 25462", ""}, {0, 0, { 183 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 184 {ST_Q_SENSE_HELP, 0, QIC_525}, /* minor 4-7 */ 185 {0, 0, QIC_150}, /* minor 8-11 */ 186 {0, 0, QIC_120} /* minor 12-15 */ 187 }}}, 188 /* 189 * One user reports that this works for his tape drive. It probably 190 * needs more work. - mycroft, 09APR1994 191 */ 192 {{T_SEQUENTIAL, T_REMOV, 193 "SANKYO ", "CP525 ", ""}, {0, 0, { 194 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 195 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 196 {0, 0, QIC_150}, /* minor 8-11 */ 197 {0, 0, QIC_120} /* minor 12-15 */ 198 }}}, 199 {{T_SEQUENTIAL, T_REMOV, 200 "ANRITSU ", "DMT780 ", ""}, {0, 0, { 201 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 202 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 203 {0, 0, QIC_150}, /* minor 8-11 */ 204 {0, 0, QIC_120} /* minor 12-15 */ 205 }}}, 206 {{T_SEQUENTIAL, T_REMOV, 207 "ARCHIVE ", "VIPER 150 21247", ""}, {ST_Q_ERASE_NOIMM, 12, { 208 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 209 {0, 0, QIC_150}, /* minor 4-7 */ 210 {0, 0, QIC_120}, /* minor 8-11 */ 211 {0, 0, QIC_24} /* minor 12-15 */ 212 }}}, 213 {{T_SEQUENTIAL, T_REMOV, 214 "ARCHIVE ", "VIPER 150 21531", ""}, {ST_Q_ERASE_NOIMM, 12, { 215 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 216 {0, 0, QIC_150}, /* minor 4-7 */ 217 {0, 0, QIC_120}, /* minor 8-11 */ 218 {0, 0, QIC_24} /* minor 12-15 */ 219 }}}, 220 {{T_SEQUENTIAL, T_REMOV, 221 "WANGTEK ", "5099ES SCSI", ""}, {0, 0, { 222 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 223 {0, 0, QIC_11}, /* minor 4-7 */ 224 {0, 0, QIC_24}, /* minor 8-11 */ 225 {0, 0, QIC_24} /* minor 12-15 */ 226 }}}, 227 {{T_SEQUENTIAL, T_REMOV, 228 "WANGTEK ", "5150ES SCSI", ""}, {0, 0, { 229 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 230 {0, 0, QIC_24}, /* minor 4-7 */ 231 {0, 0, QIC_120}, /* minor 8-11 */ 232 {0, 0, QIC_150} /* minor 12-15 */ 233 }}}, 234 {{T_SEQUENTIAL, T_REMOV, 235 "WANGTEK ", "5525ES SCSI REV7", ""}, {0, 0, { 236 {0, 0, 0}, /* minor 0-3 */ 237 {ST_Q_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 238 {0, 0, QIC_150}, /* minor 8-11 */ 239 {0, 0, QIC_120} /* minor 12-15 */ 240 }}}, 241 {{T_SEQUENTIAL, T_REMOV, 242 "WangDAT ", "Model 1300 ", ""}, {0, 0, { 243 {0, 0, 0}, /* minor 0-3 */ 244 {ST_Q_FORCE_BLKSIZE, 512, DDS}, /* minor 4-7 */ 245 {ST_Q_FORCE_BLKSIZE, 1024, DDS}, /* minor 8-11 */ 246 {ST_Q_FORCE_BLKSIZE, 0, DDS} /* minor 12-15 */ 247 }}}, 248 {{T_SEQUENTIAL, T_REMOV, 249 "EXABYTE ", "EXB-8200 ", "263H"}, {0, 5, { 250 {0, 0, 0}, /* minor 0-3 */ 251 {0, 0, 0}, /* minor 4-7 */ 252 {0, 0, 0}, /* minor 8-11 */ 253 {0, 0, 0} /* minor 12-15 */ 254 }}}, 255 {{T_SEQUENTIAL, T_REMOV, 256 "STK", "9490", ""}, 257 {ST_Q_FORCE_BLKSIZE, 0, { 258 {0, 0, 0}, /* minor 0-3 */ 259 {0, 0, 0}, /* minor 4-7 */ 260 {0, 0, 0}, /* minor 8-11 */ 261 {0, 0, 0} /* minor 12-15 */ 262 }}}, 263 {{T_SEQUENTIAL, T_REMOV, 264 "STK", "SD-3", ""}, 265 {ST_Q_FORCE_BLKSIZE, 0, { 266 {0, 0, 0}, /* minor 0-3 */ 267 {0, 0, 0}, /* minor 4-7 */ 268 {0, 0, 0}, /* minor 8-11 */ 269 {0, 0, 0} /* minor 12-15 */ 270 }}}, 271 {{T_SEQUENTIAL, T_REMOV, 272 "IBM", "03590", ""}, {ST_Q_IGNORE_LOADS, 0, { 273 {0, 0, 0}, /* minor 0-3 */ 274 {0, 0, 0}, /* minor 4-7 */ 275 {0, 0, 0}, /* minor 8-11 */ 276 {0, 0, 0} /* minor 12-15 */ 277 }}}, 278 {{T_SEQUENTIAL, T_REMOV, 279 "HP ", "T4000s ", ""}, {ST_Q_UNIMODAL, 0, { 280 {0, 0, QIC_3095}, /* minor 0-3 */ 281 {0, 0, QIC_3095}, /* minor 4-7 */ 282 {0, 0, QIC_3095}, /* minor 8-11 */ 283 {0, 0, QIC_3095}, /* minor 12-15 */ 284 }}}, 285 #if 0 286 {{T_SEQUENTIAL, T_REMOV, 287 "EXABYTE ", "EXB-8200 ", ""}, {0, 12, { 288 {0, 0, 0}, /* minor 0-3 */ 289 {0, 0, 0}, /* minor 4-7 */ 290 {0, 0, 0}, /* minor 8-11 */ 291 {0, 0, 0} /* minor 12-15 */ 292 }}}, 293 #endif 294 {{T_SEQUENTIAL, T_REMOV, 295 "TEAC ", "MT-2ST/N50 ", ""}, {ST_Q_IGNORE_LOADS, 0, { 296 {0, 0, 0}, /* minor 0-3 */ 297 {0, 0, 0}, /* minor 4-7 */ 298 {0, 0, 0}, /* minor 8-11 */ 299 {0, 0, 0} /* minor 12-15 */ 300 }}}, 301 {{T_SEQUENTIAL, T_REMOV, 302 "OnStream", "ADR50 Drive", ""}, {ST_Q_UNIMODAL, 0, { 303 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 304 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 4-7 */ 305 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 8-11 */ 306 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 12-15 */ 307 }}}, 308 {{T_SEQUENTIAL, T_REMOV, 309 "OnStream DI-30", "", "1.0"}, {ST_Q_NOFILEMARKS, 0, { 310 {0, 0, 0}, /* minor 0-3 */ 311 {0, 0, 0}, /* minor 4-7 */ 312 {0, 0, 0}, /* minor 8-11 */ 313 {0, 0, 0} /* minor 12-15 */ 314 }}}, 315 {{T_SEQUENTIAL, T_REMOV, 316 "NCR H621", "0-STD-03-46F880 ", ""}, {ST_Q_NOPREVENT, 0, { 317 {0, 0, 0}, /* minor 0-3 */ 318 {0, 0, 0}, /* minor 4-7 */ 319 {0, 0, 0}, /* minor 8-11 */ 320 {0, 0, 0} /* minor 12-15 */ 321 }}}, 322 }; 323 324 #define NOEJECT 0 325 #define EJECT 1 326 327 static void st_identify_drive(struct st_softc *, 328 struct scsipi_inquiry_pattern *); 329 static void st_loadquirks(struct st_softc *); 330 static int st_mount_tape(dev_t, int); 331 static void st_unmount(struct st_softc *, boolean); 332 static int st_decide_mode(struct st_softc *, boolean); 333 static void ststart(struct scsipi_periph *); 334 static void strestart(void *); 335 static void stdone(struct scsipi_xfer *, int); 336 static int st_read(struct st_softc *, char *, int, int); 337 static int st_space(struct st_softc *, int, u_int, int); 338 static int st_write_filemarks(struct st_softc *, int, int); 339 static int st_check_eod(struct st_softc *, boolean, int *, int); 340 static int st_load(struct st_softc *, u_int, int); 341 static int st_rewind(struct st_softc *, u_int, int); 342 static int st_interpret_sense(struct scsipi_xfer *); 343 static int st_touch_tape(struct st_softc *); 344 static int st_erase(struct st_softc *, int full, int flags); 345 static int st_rdpos(struct st_softc *, int, u_int32_t *); 346 static int st_setpos(struct st_softc *, int, u_int32_t *); 347 348 static const struct scsipi_periphsw st_switch = { 349 st_interpret_sense, 350 ststart, 351 NULL, 352 stdone 353 }; 354 355 /* 356 * A global list of all tape drives attached to the system. May grow or 357 * shrink over time. 358 */ 359 struct tapelist_head tapelist = TAILQ_HEAD_INITIALIZER(tapelist); 360 int tape_count = 0; /* number of drives in global tapelist */ 361 struct simplelock tapelist_slock = SIMPLELOCK_INITIALIZER; 362 363 #if defined(ST_ENABLE_EARLYWARN) 364 #define ST_INIT_FLAGS ST_EARLYWARN 365 #else 366 #define ST_INIT_FLAGS 0 367 #endif 368 369 /* 370 * The routine called by the low level scsi routine when it discovers 371 * A device suitable for this driver 372 */ 373 void 374 stattach(struct device *parent, struct st_softc *st, void *aux) 375 { 376 struct scsipibus_attach_args *sa = aux; 377 struct scsipi_periph *periph = sa->sa_periph; 378 379 SC_DEBUG(periph, SCSIPI_DB2, ("stattach: ")); 380 381 /* 382 * Store information needed to contact our base driver 383 */ 384 st->sc_periph = periph; 385 periph->periph_dev = &st->sc_dev; 386 periph->periph_switch = &st_switch; 387 388 /* 389 * Set initial flags 390 */ 391 392 st->flags = ST_INIT_FLAGS; 393 394 /* 395 * Set up the buf queue for this device 396 */ 397 bufq_alloc(&st->buf_queue, "fcfs", 0); 398 399 callout_init(&st->sc_callout); 400 401 /* 402 * Check if the drive is a known criminal and take 403 * Any steps needed to bring it into line 404 */ 405 st_identify_drive(st, &sa->sa_inqbuf); 406 /* 407 * Use the subdriver to request information regarding the drive. 408 */ 409 printf("\n"); 410 printf("%s: %s", st->sc_dev.dv_xname, st->quirkdata ? "quirks apply, " : ""); 411 if (scsipi_test_unit_ready(periph, 412 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE) || 413 st->ops(st, ST_OPS_MODESENSE, 414 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE)) 415 printf("drive empty\n"); 416 else { 417 printf("density code %d, ", st->media_density); 418 if (st->media_blksize > 0) 419 printf("%d-byte", st->media_blksize); 420 else 421 printf("variable"); 422 printf(" blocks, write-%s\n", 423 (st->flags & ST_READONLY) ? "protected" : "enabled"); 424 } 425 426 st->stats = drive_attach(st->sc_dev.dv_xname); 427 428 #if NRND > 0 429 rnd_attach_source(&st->rnd_source, st->sc_dev.dv_xname, 430 RND_TYPE_TAPE, 0); 431 #endif 432 } 433 434 int 435 stactivate(struct device *self, enum devact act) 436 { 437 int rv = 0; 438 439 switch (act) { 440 case DVACT_ACTIVATE: 441 rv = EOPNOTSUPP; 442 break; 443 444 case DVACT_DEACTIVATE: 445 /* 446 * Nothing to do; we key off the device's DVF_ACTIVE. 447 */ 448 break; 449 } 450 return (rv); 451 } 452 453 int 454 stdetach(struct device *self, int flags) 455 { 456 struct st_softc *st = (struct st_softc *)self; 457 int s, bmaj, cmaj, mn; 458 459 /* locate the major number */ 460 bmaj = bdevsw_lookup_major(&st_bdevsw); 461 cmaj = cdevsw_lookup_major(&st_cdevsw); 462 463 /* kill any pending restart */ 464 callout_stop(&st->sc_callout); 465 466 s = splbio(); 467 468 /* Kill off any queued buffers. */ 469 bufq_drain(st->buf_queue); 470 471 bufq_free(st->buf_queue); 472 473 /* Kill off any pending commands. */ 474 scsipi_kill_pending(st->sc_periph); 475 476 splx(s); 477 478 /* Nuke the vnodes for any open instances */ 479 mn = STUNIT(self->dv_unit); 480 vdevgone(bmaj, mn, mn+STNMINOR-1, VBLK); 481 vdevgone(cmaj, mn, mn+STNMINOR-1, VCHR); 482 483 if (tape_count == 0) { 484 printf("%s detach: tape_count already zero\n", 485 st->sc_dev.dv_xname); 486 } else { 487 simple_lock(&tapelist_slock); 488 TAILQ_REMOVE(&tapelist, st->stats, link); 489 tape_count--; 490 simple_unlock(&tapelist_slock); 491 free(st->stats, M_DEVBUF); 492 } 493 494 #if NRND > 0 495 /* Unhook the entropy source. */ 496 rnd_detach_source(&st->rnd_source); 497 #endif 498 499 return (0); 500 } 501 502 /* 503 * Use the inquiry routine in 'scsi_base' to get drive info so we can 504 * Further tailor our behaviour. 505 */ 506 static void 507 st_identify_drive(struct st_softc *st, struct scsipi_inquiry_pattern *inqbuf) 508 { 509 const struct st_quirk_inquiry_pattern *finger; 510 int priority; 511 512 finger = scsipi_inqmatch(inqbuf, 513 st_quirk_patterns, 514 sizeof(st_quirk_patterns) / sizeof(st_quirk_patterns[0]), 515 sizeof(st_quirk_patterns[0]), &priority); 516 if (priority != 0) { 517 st->quirkdata = &finger->quirkdata; 518 st->drive_quirks = finger->quirkdata.quirks; 519 st->quirks = finger->quirkdata.quirks; /* start value */ 520 st->page_0_size = finger->quirkdata.page_0_size; 521 st_loadquirks(st); 522 } 523 } 524 525 /* 526 * initialise the subdevices to the default (QUIRK) state. 527 * this will remove any setting made by the system operator or previous 528 * operations. 529 */ 530 static void 531 st_loadquirks(struct st_softc *st) 532 { 533 int i; 534 const struct modes *mode; 535 struct modes *mode2; 536 537 mode = st->quirkdata->modes; 538 mode2 = st->modes; 539 for (i = 0; i < 4; i++) { 540 memset(mode2, 0, sizeof(struct modes)); 541 st->modeflags[i] &= ~(BLKSIZE_SET_BY_QUIRK | 542 DENSITY_SET_BY_QUIRK | BLKSIZE_SET_BY_USER | 543 DENSITY_SET_BY_USER); 544 if ((mode->quirks | st->drive_quirks) & ST_Q_FORCE_BLKSIZE) { 545 mode2->blksize = mode->blksize; 546 st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; 547 } 548 if (mode->density) { 549 mode2->density = mode->density; 550 st->modeflags[i] |= DENSITY_SET_BY_QUIRK; 551 } 552 mode2->quirks |= mode->quirks; 553 mode++; 554 mode2++; 555 } 556 } 557 558 /* 559 * open the device. 560 */ 561 static int 562 stopen(dev_t dev, int flags, int mode, struct lwp *l) 563 { 564 u_int stmode, dsty; 565 int error, sflags, unit, tries, ntries; 566 struct st_softc *st; 567 struct scsipi_periph *periph; 568 struct scsipi_adapter *adapt; 569 570 unit = STUNIT(dev); 571 if (unit >= st_cd.cd_ndevs) 572 return (ENXIO); 573 st = st_cd.cd_devs[unit]; 574 if (st == NULL) 575 return (ENXIO); 576 577 stmode = STMODE(dev); 578 dsty = STDSTY(dev); 579 580 periph = st->sc_periph; 581 adapt = periph->periph_channel->chan_adapter; 582 583 SC_DEBUG(periph, SCSIPI_DB1, ("open: dev=0x%x (unit %d (of %d))\n", dev, 584 unit, st_cd.cd_ndevs)); 585 586 587 /* 588 * Only allow one at a time 589 */ 590 if (periph->periph_flags & PERIPH_OPEN) { 591 printf("%s: already open\n", st->sc_dev.dv_xname); 592 return (EBUSY); 593 } 594 595 if ((error = scsipi_adapter_addref(adapt)) != 0) 596 return (error); 597 598 /* 599 * clear any latched errors. 600 */ 601 st->mt_resid = 0; 602 st->mt_erreg = 0; 603 st->asc = 0; 604 st->ascq = 0; 605 606 /* 607 * Catch any unit attention errors. Be silent about this 608 * unless we're already mounted. We ignore media change 609 * if we're in control mode or not mounted yet. 610 */ 611 if ((st->flags & ST_MOUNTED) == 0 || stmode == CTRL_MODE) { 612 #ifdef SCSIDEBUG 613 sflags = XS_CTL_IGNORE_MEDIA_CHANGE; 614 #else 615 sflags = XS_CTL_SILENT|XS_CTL_IGNORE_MEDIA_CHANGE; 616 #endif 617 } else 618 sflags = 0; 619 620 /* 621 * If we're already mounted or we aren't configured for 622 * a mount delay, only try a test unit ready once. Otherwise, 623 * try up to ST_MOUNT_DELAY times with a rest interval of 624 * one second between each try. 625 */ 626 627 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0) { 628 ntries = 1; 629 } else { 630 ntries = ST_MOUNT_DELAY; 631 } 632 633 for (error = tries = 0; tries < ntries; tries++) { 634 int slpintr, oflags; 635 636 /* 637 * If we had no error, or we're opening the control mode 638 * device, we jump out right away. 639 */ 640 641 error = scsipi_test_unit_ready(periph, sflags); 642 if (error == 0 || stmode == CTRL_MODE) { 643 break; 644 } 645 646 /* 647 * We had an error. 648 * 649 * If we're already mounted or we aren't configured for 650 * a mount delay, or the error isn't a NOT READY error, 651 * skip to the error exit now. 652 */ 653 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0 || 654 (st->mt_key != SKEY_NOT_READY)) { 655 goto bad; 656 } 657 658 /* 659 * clear any latched errors. 660 */ 661 st->mt_resid = 0; 662 st->mt_erreg = 0; 663 st->asc = 0; 664 st->ascq = 0; 665 666 /* 667 * Fake that we have the device open so 668 * we block other apps from getting in. 669 */ 670 671 oflags = periph->periph_flags; 672 periph->periph_flags |= PERIPH_OPEN; 673 674 slpintr = tsleep(&lbolt, PUSER|PCATCH, "stload", 0); 675 676 periph->periph_flags = oflags; /* restore flags */ 677 if (slpintr) { 678 goto bad; 679 } 680 } 681 682 683 /* 684 * If the mode is 3 (e.g. minor = 3,7,11,15) then the device has 685 * been opened to set defaults and perform other, usually non-I/O 686 * related, operations. In this case, do a quick check to see 687 * whether the unit actually had a tape loaded (this will be known 688 * as to whether or not we got a NOT READY for the above 689 * unit attention). If a tape is there, go do a mount sequence. 690 */ 691 if (stmode == CTRL_MODE && st->mt_key == SKEY_NOT_READY) { 692 periph->periph_flags |= PERIPH_OPEN; 693 return (0); 694 } 695 696 /* 697 * If we get this far and had an error set, that means we failed 698 * to pass the 'test unit ready' test for the non-controlmode device, 699 * so we bounce the open. 700 */ 701 702 if (error) 703 return (error); 704 705 /* 706 * Else, we're now committed to saying we're open. 707 */ 708 709 periph->periph_flags |= PERIPH_OPEN; /* unit attn are now errors */ 710 711 /* 712 * If it's a different mode, or if the media has been 713 * invalidated, unmount the tape from the previous 714 * session but continue with open processing 715 */ 716 if (st->last_dsty != dsty || 717 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 718 st_unmount(st, NOEJECT); 719 720 /* 721 * If we are not mounted, then we should start a new 722 * mount session. 723 */ 724 if (!(st->flags & ST_MOUNTED)) { 725 if ((error = st_mount_tape(dev, flags)) != 0) 726 goto bad; 727 st->last_dsty = dsty; 728 } 729 if (!(st->quirks & ST_Q_NOPREVENT)) { 730 scsipi_prevent(periph, SPAMR_PREVENT_DT, 731 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 732 } 733 734 SC_DEBUG(periph, SCSIPI_DB2, ("open complete\n")); 735 return (0); 736 737 bad: 738 st_unmount(st, NOEJECT); 739 scsipi_adapter_delref(adapt); 740 periph->periph_flags &= ~PERIPH_OPEN; 741 return (error); 742 } 743 744 /* 745 * close the device.. only called if we are the LAST 746 * occurence of an open device 747 */ 748 static int 749 stclose(dev_t dev, int flags, int mode, struct lwp *l) 750 { 751 int stxx, error = 0; 752 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 753 struct scsipi_periph *periph = st->sc_periph; 754 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 755 756 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("closing\n")); 757 758 /* 759 * Make sure that a tape opened in write-only mode will have 760 * file marks written on it when closed, even if not written to. 761 * 762 * This is for SUN compatibility. Actually, the Sun way of 763 * things is to: 764 * 765 * only write filemarks if there are fmks to be written and 766 * - open for write (possibly read/write) 767 * - the last operation was a write 768 * or: 769 * - opened for wronly 770 * - no data was written (including filemarks) 771 */ 772 773 stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); 774 if (((flags & FWRITE) && stxx == ST_WRITTEN) || 775 ((flags & O_ACCMODE) == FWRITE && stxx == 0)) { 776 int nm; 777 error = st_check_eod(st, FALSE, &nm, 0); 778 } 779 780 /* 781 * Allow robots to eject tape if needed. 782 */ 783 scsipi_prevent(periph, SPAMR_ALLOW, 784 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 785 786 switch (STMODE(dev)) { 787 case NORMAL_MODE: 788 st_unmount(st, NOEJECT); 789 break; 790 case NOREW_MODE: 791 case CTRL_MODE: 792 /* 793 * Leave mounted unless media seems to have been removed. 794 * 795 * Otherwise, if we're to terminate a tape with more than one 796 * filemark [ and because we're not rewinding here ], backspace 797 * one filemark so that later appends will see an unbroken 798 * sequence of: 799 * 800 * file - FMK - file - FMK ... file - FMK FMK (EOM) 801 */ 802 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 803 st_unmount(st, NOEJECT); 804 } else if (error == 0) { 805 /* 806 * ST_WRITTEN was preserved from above. 807 * 808 * All we need to know here is: 809 * 810 * Were we writing this tape and was the last 811 * operation a write? 812 * 813 * Are there supposed to be 2FM at EOD? 814 * 815 * If both statements are true, then we backspace 816 * one filemark. 817 */ 818 stxx |= (st->flags & ST_2FM_AT_EOD); 819 if ((flags & FWRITE) != 0 && 820 (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { 821 error = st_space(st, -1, SP_FILEMARKS, 0); 822 } 823 } 824 break; 825 case EJECT_MODE: 826 st_unmount(st, EJECT); 827 break; 828 } 829 830 scsipi_wait_drain(periph); 831 832 scsipi_adapter_delref(adapt); 833 periph->periph_flags &= ~PERIPH_OPEN; 834 835 return (error); 836 } 837 838 /* 839 * Start a new mount session. 840 * Copy in all the default parameters from the selected device mode. 841 * and try guess any that seem to be defaulted. 842 */ 843 static int 844 st_mount_tape(dev_t dev, int flags) 845 { 846 int unit; 847 u_int dsty; 848 struct st_softc *st; 849 struct scsipi_periph *periph; 850 int error = 0; 851 852 unit = STUNIT(dev); 853 dsty = STDSTY(dev); 854 st = st_cd.cd_devs[unit]; 855 periph = st->sc_periph; 856 857 if (st->flags & ST_MOUNTED) 858 return (0); 859 860 SC_DEBUG(periph, SCSIPI_DB1, ("mounting\n ")); 861 st->flags |= ST_NEW_MOUNT; 862 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 863 /* 864 * If the media is new, then make sure we give it a chance to 865 * to do a 'load' instruction. (We assume it is new.) 866 */ 867 if ((error = st_load(st, LD_LOAD, XS_CTL_SILENT)) != 0) 868 return (error); 869 /* 870 * Throw another dummy instruction to catch 871 * 'Unit attention' errors. Many drives give 872 * these after doing a Load instruction (with 873 * the MEDIUM MAY HAVE CHANGED asc/ascq). 874 */ 875 scsipi_test_unit_ready(periph, XS_CTL_SILENT); /* XXX */ 876 877 /* 878 * Some devices can't tell you much until they have been 879 * asked to look at the media. This quirk does this. 880 */ 881 if (st->quirks & ST_Q_SENSE_HELP) 882 if ((error = st_touch_tape(st)) != 0) 883 return (error); 884 /* 885 * Load the physical device parameters 886 * loads: blkmin, blkmax 887 */ 888 if ((error = st->ops(st, ST_OPS_RBL, 0)) != 0) 889 return (error); 890 /* 891 * Load the media dependent parameters 892 * includes: media_blksize,media_density,numblks 893 * As we have a tape in, it should be reflected here. 894 * If not you may need the "quirk" above. 895 */ 896 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 897 return (error); 898 /* 899 * If we have gained a permanent density from somewhere, 900 * then use it in preference to the one supplied by 901 * default by the driver. 902 */ 903 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 904 st->density = st->modes[dsty].density; 905 else 906 st->density = st->media_density; 907 /* 908 * If we have gained a permanent blocksize 909 * then use it in preference to the one supplied by 910 * default by the driver. 911 */ 912 st->flags &= ~ST_FIXEDBLOCKS; 913 if (st->modeflags[dsty] & 914 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 915 st->blksize = st->modes[dsty].blksize; 916 if (st->blksize) 917 st->flags |= ST_FIXEDBLOCKS; 918 } else { 919 if ((error = st_decide_mode(st, FALSE)) != 0) 920 return (error); 921 } 922 if ((error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 923 /* ATAPI will return ENODEV for this, and this may be OK */ 924 if (error != ENODEV) { 925 printf("%s: cannot set selected mode\n", 926 st->sc_dev.dv_xname); 927 return (error); 928 } 929 } 930 st->flags &= ~ST_NEW_MOUNT; 931 st->flags |= ST_MOUNTED; 932 periph->periph_flags |= PERIPH_MEDIA_LOADED; /* move earlier? */ 933 st->blkno = st->fileno = (daddr_t) 0; 934 return (0); 935 } 936 937 /* 938 * End the present mount session. 939 * Rewind, and optionally eject the tape. 940 * Reset various flags to indicate that all new 941 * operations require another mount operation 942 */ 943 static void 944 st_unmount(struct st_softc *st, boolean eject) 945 { 946 struct scsipi_periph *periph = st->sc_periph; 947 int nmarks; 948 949 if ((st->flags & ST_MOUNTED) == 0) 950 return; 951 SC_DEBUG(periph, SCSIPI_DB1, ("unmounting\n")); 952 st_check_eod(st, FALSE, &nmarks, XS_CTL_IGNORE_NOT_READY); 953 st_rewind(st, 0, XS_CTL_IGNORE_NOT_READY); 954 955 /* 956 * Section 9.3.3 of the SCSI specs states that a device shall return 957 * the density value specified in the last succesfull MODE SELECT 958 * after an unload operation, in case it is not able to 959 * automatically determine the density of the new medium. 960 * 961 * So we instruct the device to use the default density, which will 962 * prevent the use of stale density values (in particular, 963 * in st_touch_tape(). 964 */ 965 st->density = 0; 966 if (st->ops(st, ST_OPS_MODESELECT, 0) != 0) { 967 printf("%s: WARNING: cannot revert to default density\n", 968 st->sc_dev.dv_xname); 969 } 970 971 if (eject) { 972 if (!(st->quirks & ST_Q_NOPREVENT)) { 973 scsipi_prevent(periph, SPAMR_ALLOW, 974 XS_CTL_IGNORE_ILLEGAL_REQUEST | 975 XS_CTL_IGNORE_NOT_READY); 976 } 977 st_load(st, LD_UNLOAD, XS_CTL_IGNORE_NOT_READY); 978 st->blkno = st->fileno = (daddr_t) -1; 979 } else { 980 st->blkno = st->fileno = (daddr_t) 0; 981 } 982 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 983 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 984 } 985 986 /* 987 * Given all we know about the device, media, mode, 'quirks' and 988 * initial operation, make a decision as to how we should be set 989 * to run (regarding blocking and EOD marks) 990 */ 991 int 992 st_decide_mode(struct st_softc *st, boolean first_read) 993 { 994 995 SC_DEBUG(st->sc_periph, SCSIPI_DB2, ("starting block mode decision\n")); 996 997 /* 998 * If the drive can only handle fixed-length blocks and only at 999 * one size, perhaps we should just do that. 1000 */ 1001 if (st->blkmin && (st->blkmin == st->blkmax)) { 1002 st->flags |= ST_FIXEDBLOCKS; 1003 st->blksize = st->blkmin; 1004 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1005 ("blkmin == blkmax of %d\n", st->blkmin)); 1006 goto done; 1007 } 1008 /* 1009 * If the tape density mandates (or even suggests) use of fixed 1010 * or variable-length blocks, comply. 1011 */ 1012 switch (st->density) { 1013 case HALFINCH_800: 1014 case HALFINCH_1600: 1015 case HALFINCH_6250: 1016 case DDS: 1017 st->flags &= ~ST_FIXEDBLOCKS; 1018 st->blksize = 0; 1019 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1020 ("density specified variable\n")); 1021 goto done; 1022 case QIC_11: 1023 case QIC_24: 1024 case QIC_120: 1025 case QIC_150: 1026 case QIC_525: 1027 case QIC_1320: 1028 case QIC_3095: 1029 case QIC_3220: 1030 st->flags |= ST_FIXEDBLOCKS; 1031 if (st->media_blksize > 0) 1032 st->blksize = st->media_blksize; 1033 else 1034 st->blksize = DEF_FIXED_BSIZE; 1035 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1036 ("density specified fixed\n")); 1037 goto done; 1038 } 1039 /* 1040 * If we're about to read the tape, perhaps we should choose 1041 * fixed or variable-length blocks and block size according to 1042 * what the drive found on the tape. 1043 */ 1044 if (first_read && 1045 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 1046 (st->media_blksize == DEF_FIXED_BSIZE) || 1047 (st->media_blksize == 1024))) { 1048 if (st->media_blksize > 0) 1049 st->flags |= ST_FIXEDBLOCKS; 1050 else 1051 st->flags &= ~ST_FIXEDBLOCKS; 1052 st->blksize = st->media_blksize; 1053 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1054 ("Used media_blksize of %d\n", st->media_blksize)); 1055 goto done; 1056 } 1057 /* 1058 * We're getting no hints from any direction. Choose variable- 1059 * length blocks arbitrarily. 1060 */ 1061 st->flags &= ~ST_FIXEDBLOCKS; 1062 st->blksize = 0; 1063 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1064 ("Give up and default to variable mode\n")); 1065 1066 done: 1067 /* 1068 * Decide whether or not to write two file marks to signify end- 1069 * of-data. Make the decision as a function of density. If 1070 * the decision is not to use a second file mark, the SCSI BLANK 1071 * CHECK condition code will be recognized as end-of-data when 1072 * first read. 1073 * (I think this should be a by-product of fixed/variable..julian) 1074 */ 1075 switch (st->density) { 1076 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 1077 case QIC_11: 1078 case QIC_24: 1079 case QIC_120: 1080 case QIC_150: 1081 case QIC_525: 1082 case QIC_1320: 1083 case QIC_3095: 1084 case QIC_3220: 1085 st->flags &= ~ST_2FM_AT_EOD; 1086 break; 1087 default: 1088 st->flags |= ST_2FM_AT_EOD; 1089 } 1090 return (0); 1091 } 1092 1093 /* 1094 * Actually translate the requested transfer into 1095 * one the physical driver can understand 1096 * The transfer is described by a buf and will include 1097 * only one physical transfer. 1098 */ 1099 static void 1100 ststrategy(struct buf *bp) 1101 { 1102 struct st_softc *st = st_cd.cd_devs[STUNIT(bp->b_dev)]; 1103 int s; 1104 1105 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1106 ("ststrategy %d bytes @ blk %" PRId64 "\n", bp->b_bcount, bp->b_blkno)); 1107 /* 1108 * If it's a null transfer, return immediatly 1109 */ 1110 if (bp->b_bcount == 0) 1111 goto done; 1112 1113 /* If offset is negative, error */ 1114 if (bp->b_blkno < 0) { 1115 bp->b_error = EINVAL; 1116 goto bad; 1117 } 1118 1119 /* 1120 * Odd sized request on fixed drives are verboten 1121 */ 1122 if (st->flags & ST_FIXEDBLOCKS) { 1123 if (bp->b_bcount % st->blksize) { 1124 printf("%s: bad request, must be multiple of %d\n", 1125 st->sc_dev.dv_xname, st->blksize); 1126 bp->b_error = EIO; 1127 goto bad; 1128 } 1129 } 1130 /* 1131 * as are out-of-range requests on variable drives. 1132 */ 1133 else if (bp->b_bcount < st->blkmin || 1134 (st->blkmax && bp->b_bcount > st->blkmax)) { 1135 printf("%s: bad request, must be between %d and %d\n", 1136 st->sc_dev.dv_xname, st->blkmin, st->blkmax); 1137 bp->b_error = EIO; 1138 goto bad; 1139 } 1140 s = splbio(); 1141 1142 /* 1143 * Place it in the queue of activities for this tape 1144 * at the end (a bit silly because we only have on user.. 1145 * (but it could fork())) 1146 */ 1147 BUFQ_PUT(st->buf_queue, bp); 1148 1149 /* 1150 * Tell the device to get going on the transfer if it's 1151 * not doing anything, otherwise just wait for completion 1152 * (All a bit silly if we're only allowing 1 open but..) 1153 */ 1154 ststart(st->sc_periph); 1155 1156 splx(s); 1157 return; 1158 bad: 1159 bp->b_flags |= B_ERROR; 1160 done: 1161 /* 1162 * Correctly set the buf to indicate a completed xfer 1163 */ 1164 bp->b_resid = bp->b_bcount; 1165 biodone(bp); 1166 return; 1167 } 1168 1169 /* 1170 * ststart looks to see if there is a buf waiting for the device 1171 * and that the device is not already busy. If both are true, 1172 * It dequeues the buf and creates a scsi command to perform the 1173 * transfer required. The transfer request will call scsipi_done 1174 * on completion, which will in turn call this routine again 1175 * so that the next queued transfer is performed. 1176 * The bufs are queued by the strategy routine (ststrategy) 1177 * 1178 * This routine is also called after other non-queued requests 1179 * have been made of the scsi driver, to ensure that the queue 1180 * continues to be drained. 1181 * ststart() is called at splbio 1182 */ 1183 static void 1184 ststart(struct scsipi_periph *periph) 1185 { 1186 struct st_softc *st = (void *)periph->periph_dev; 1187 struct buf *bp; 1188 struct scsi_rw_tape cmd; 1189 struct scsipi_xfer *xs; 1190 int flags, error; 1191 1192 SC_DEBUG(periph, SCSIPI_DB2, ("ststart ")); 1193 /* 1194 * See if there is a buf to do and we are not already 1195 * doing one 1196 */ 1197 while (periph->periph_active < periph->periph_openings) { 1198 /* if a special awaits, let it proceed first */ 1199 if (periph->periph_flags & PERIPH_WAITING) { 1200 periph->periph_flags &= ~PERIPH_WAITING; 1201 wakeup((caddr_t)periph); 1202 return; 1203 } 1204 1205 /* 1206 * If the device has been unmounted by the user 1207 * then throw away all requests until done. 1208 */ 1209 if (__predict_false((st->flags & ST_MOUNTED) == 0 || 1210 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0)) { 1211 if ((bp = BUFQ_GET(st->buf_queue)) != NULL) { 1212 /* make sure that one implies the other.. */ 1213 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 1214 bp->b_flags |= B_ERROR; 1215 bp->b_error = EIO; 1216 bp->b_resid = bp->b_bcount; 1217 biodone(bp); 1218 continue; 1219 } else { 1220 return; 1221 } 1222 } 1223 1224 if ((bp = BUFQ_PEEK(st->buf_queue)) == NULL) 1225 return; 1226 1227 if (st->stats->busy++ == 0) 1228 getmicrouptime(&st->stats->timestamp); 1229 1230 /* 1231 * only FIXEDBLOCK devices have pending I/O or space operations. 1232 */ 1233 if (st->flags & ST_FIXEDBLOCKS) { 1234 /* 1235 * If we are at a filemark but have not reported it yet 1236 * then we should report it now 1237 */ 1238 if (st->flags & ST_AT_FILEMARK) { 1239 if ((bp->b_flags & B_READ) == B_WRITE) { 1240 /* 1241 * Handling of ST_AT_FILEMARK in 1242 * st_space will fill in the right file 1243 * mark count. 1244 * Back up over filemark 1245 */ 1246 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1247 BUFQ_GET(st->buf_queue); 1248 bp->b_flags |= B_ERROR; 1249 bp->b_error = EIO; 1250 biodone(bp); 1251 continue; 1252 } 1253 } else { 1254 BUFQ_GET(st->buf_queue); 1255 bp->b_resid = bp->b_bcount; 1256 bp->b_error = 0; 1257 bp->b_flags &= ~B_ERROR; 1258 st->flags &= ~ST_AT_FILEMARK; 1259 biodone(bp); 1260 continue; /* seek more work */ 1261 } 1262 } 1263 } 1264 /* 1265 * If we are at EOM but have not reported it 1266 * yet then we should report it now. 1267 */ 1268 if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { 1269 BUFQ_GET(st->buf_queue); 1270 bp->b_resid = bp->b_bcount; 1271 if (st->flags & ST_EIO_PENDING) { 1272 bp->b_error = EIO; 1273 bp->b_flags |= B_ERROR; 1274 } 1275 st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); 1276 biodone(bp); 1277 continue; /* seek more work */ 1278 } 1279 1280 /* 1281 * Fill out the scsi command 1282 */ 1283 memset(&cmd, 0, sizeof(cmd)); 1284 flags = XS_CTL_NOSLEEP | XS_CTL_ASYNC; 1285 if ((bp->b_flags & B_READ) == B_WRITE) { 1286 cmd.opcode = WRITE; 1287 st->flags &= ~ST_FM_WRITTEN; 1288 flags |= XS_CTL_DATA_OUT; 1289 } else { 1290 cmd.opcode = READ; 1291 flags |= XS_CTL_DATA_IN; 1292 } 1293 1294 /* 1295 * Handle "fixed-block-mode" tape drives by using the 1296 * block count instead of the length. 1297 */ 1298 if (st->flags & ST_FIXEDBLOCKS) { 1299 cmd.byte2 |= SRW_FIXED; 1300 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1301 } else 1302 _lto3b(bp->b_bcount, cmd.len); 1303 1304 /* 1305 * Clear 'position updated' indicator 1306 */ 1307 st->flags &= ~ST_POSUPDATED; 1308 1309 /* 1310 * go ask the adapter to do all this for us 1311 */ 1312 xs = scsipi_make_xs(periph, 1313 (struct scsipi_generic *)&cmd, sizeof(cmd), 1314 (u_char *)bp->b_data, bp->b_bcount, 1315 0, ST_IO_TIME, bp, flags); 1316 if (__predict_false(xs == NULL)) { 1317 /* 1318 * out of memory. Keep this buffer in the queue, and 1319 * retry later. 1320 */ 1321 callout_reset(&st->sc_callout, hz / 2, strestart, 1322 periph); 1323 return; 1324 } 1325 /* 1326 * need to dequeue the buffer before queuing the command, 1327 * because cdstart may be called recursively from the 1328 * HBA driver 1329 */ 1330 #ifdef DIAGNOSTIC 1331 if (BUFQ_GET(st->buf_queue) != bp) 1332 panic("ststart(): dequeued wrong buf"); 1333 #else 1334 BUFQ_GET(st->buf_queue); 1335 #endif 1336 error = scsipi_execute_xs(xs); 1337 /* with a scsipi_xfer preallocated, scsipi_command can't fail */ 1338 KASSERT(error == 0); 1339 } /* go back and see if we can cram more work in.. */ 1340 } 1341 1342 static void 1343 strestart(void *v) 1344 { 1345 int s = splbio(); 1346 ststart((struct scsipi_periph *)v); 1347 splx(s); 1348 } 1349 1350 1351 static void 1352 stdone(struct scsipi_xfer *xs, int error) 1353 { 1354 struct st_softc *st = (void *)xs->xs_periph->periph_dev; 1355 struct buf *bp = xs->bp; 1356 struct timeval st_time, diff_time; 1357 1358 if (bp) { 1359 bp->b_error = error; 1360 bp->b_resid = xs->resid; 1361 if (error) 1362 bp->b_flags |= B_ERROR; 1363 1364 if ((bp->b_flags & B_READ) == B_WRITE) 1365 st->flags |= ST_WRITTEN; 1366 else 1367 st->flags &= ~ST_WRITTEN; 1368 1369 if (st->stats->busy-- == 0) { 1370 /* this is not really fatal so we don't panic */ 1371 printf("%s: busy < 0, Oops.\n", st->stats->name); 1372 st->stats->busy = 0; 1373 } else { 1374 getmicrouptime(&st_time); 1375 1376 timersub(&st_time, &st->stats->timestamp, &diff_time); 1377 timeradd(&st->stats->time, &diff_time, 1378 &st->stats->time); 1379 1380 st->stats->timestamp = st_time; 1381 if (bp->b_bcount > 0) { 1382 if ((bp->b_flags & B_READ) == B_WRITE) { 1383 st->stats->wbytes += bp->b_bcount; 1384 st->stats->wxfer++; 1385 } else { 1386 st->stats->rbytes += bp->b_bcount; 1387 st->stats->rxfer++; 1388 } 1389 } 1390 } 1391 1392 1393 #if NRND > 0 1394 rnd_add_uint32(&st->rnd_source, bp->b_blkno); 1395 #endif 1396 1397 if ((st->flags & ST_POSUPDATED) == 0) { 1398 if (error) { 1399 st->fileno = st->blkno = -1; 1400 } else if (st->blkno != -1) { 1401 if (st->flags & ST_FIXEDBLOCKS) 1402 st->blkno += 1403 (bp->b_bcount / st->blksize); 1404 else 1405 st->blkno++; 1406 } 1407 } 1408 1409 biodone(bp); 1410 } 1411 } 1412 1413 static int 1414 stread(dev_t dev, struct uio *uio, int iomode) 1415 { 1416 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1417 1418 return (physio(ststrategy, NULL, dev, B_READ, 1419 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1420 } 1421 1422 static int 1423 stwrite(dev_t dev, struct uio *uio, int iomode) 1424 { 1425 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1426 1427 return (physio(ststrategy, NULL, dev, B_WRITE, 1428 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1429 } 1430 1431 /* 1432 * Perform special action on behalf of the user; 1433 * knows about the internals of this device 1434 */ 1435 static int 1436 stioctl(dev_t dev, u_long cmd, caddr_t arg, int flag, struct lwp *l) 1437 { 1438 int error = 0; 1439 int unit; 1440 int number, nmarks, dsty; 1441 int flags; 1442 struct st_softc *st; 1443 int hold_blksize; 1444 u_int8_t hold_density; 1445 struct mtop *mt = (struct mtop *) arg; 1446 1447 /* 1448 * Find the device that the user is talking about 1449 */ 1450 flags = 0; /* give error messages, act on errors etc. */ 1451 unit = STUNIT(dev); 1452 dsty = STDSTY(dev); 1453 st = st_cd.cd_devs[unit]; 1454 hold_blksize = st->blksize; 1455 hold_density = st->density; 1456 1457 switch ((u_int) cmd) { 1458 1459 case MTIOCGET: { 1460 struct mtget *g = (struct mtget *) arg; 1461 /* 1462 * (to get the current state of READONLY) 1463 */ 1464 error = st->ops(st, ST_OPS_MODESENSE, XS_CTL_SILENT); 1465 if (error) { 1466 /* 1467 * Ignore the error if in control mode; 1468 * this is mandated by st(4). 1469 */ 1470 if (STMODE(dev) != CTRL_MODE) 1471 break; 1472 error = 0; 1473 } 1474 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("[ioctl: get status]\n")); 1475 memset(g, 0, sizeof(struct mtget)); 1476 g->mt_type = 0x7; /* Ultrix compat *//*? */ 1477 g->mt_blksiz = st->blksize; 1478 g->mt_density = st->density; 1479 g->mt_mblksiz[0] = st->modes[0].blksize; 1480 g->mt_mblksiz[1] = st->modes[1].blksize; 1481 g->mt_mblksiz[2] = st->modes[2].blksize; 1482 g->mt_mblksiz[3] = st->modes[3].blksize; 1483 g->mt_mdensity[0] = st->modes[0].density; 1484 g->mt_mdensity[1] = st->modes[1].density; 1485 g->mt_mdensity[2] = st->modes[2].density; 1486 g->mt_mdensity[3] = st->modes[3].density; 1487 g->mt_fileno = st->fileno; 1488 g->mt_blkno = st->blkno; 1489 if (st->flags & ST_READONLY) 1490 g->mt_dsreg |= MT_DS_RDONLY; 1491 if (st->flags & ST_MOUNTED) 1492 g->mt_dsreg |= MT_DS_MOUNTED; 1493 g->mt_resid = st->mt_resid; 1494 g->mt_erreg = st->mt_erreg; 1495 /* 1496 * clear latched errors. 1497 */ 1498 st->mt_resid = 0; 1499 st->mt_erreg = 0; 1500 st->asc = 0; 1501 st->ascq = 0; 1502 break; 1503 } 1504 case MTIOCTOP: { 1505 1506 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1507 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1508 mt->mt_count)); 1509 1510 /* compat: in U*x it is a short */ 1511 number = mt->mt_count; 1512 switch ((short) (mt->mt_op)) { 1513 case MTWEOF: /* write an end-of-file record */ 1514 error = st_write_filemarks(st, number, flags); 1515 break; 1516 case MTBSF: /* backward space file */ 1517 number = -number; 1518 case MTFSF: /* forward space file */ 1519 error = st_check_eod(st, FALSE, &nmarks, flags); 1520 if (!error) 1521 error = st_space(st, number - nmarks, 1522 SP_FILEMARKS, flags); 1523 break; 1524 case MTBSR: /* backward space record */ 1525 number = -number; 1526 case MTFSR: /* forward space record */ 1527 error = st_check_eod(st, TRUE, &nmarks, flags); 1528 if (!error) 1529 error = st_space(st, number, SP_BLKS, flags); 1530 break; 1531 case MTREW: /* rewind */ 1532 error = st_rewind(st, 0, flags); 1533 break; 1534 case MTOFFL: /* rewind and put the drive offline */ 1535 st_unmount(st, EJECT); 1536 break; 1537 case MTNOP: /* no operation, sets status only */ 1538 break; 1539 case MTRETEN: /* retension the tape */ 1540 error = st_load(st, LD_RETENSION, flags); 1541 if (!error) 1542 error = st_load(st, LD_LOAD, flags); 1543 break; 1544 case MTEOM: /* forward space to end of media */ 1545 error = st_check_eod(st, FALSE, &nmarks, flags); 1546 if (!error) 1547 error = st_space(st, 1, SP_EOM, flags); 1548 break; 1549 case MTCACHE: /* enable controller cache */ 1550 st->flags &= ~ST_DONTBUFFER; 1551 goto try_new_value; 1552 case MTNOCACHE: /* disable controller cache */ 1553 st->flags |= ST_DONTBUFFER; 1554 goto try_new_value; 1555 case MTERASE: /* erase volume */ 1556 error = st_erase(st, number, flags); 1557 break; 1558 case MTSETBSIZ: /* Set block size for device */ 1559 #ifdef NOTYET 1560 if (!(st->flags & ST_NEW_MOUNT)) { 1561 uprintf("re-mount tape before changing blocksize"); 1562 error = EINVAL; 1563 break; 1564 } 1565 #endif 1566 if (number == 0) 1567 st->flags &= ~ST_FIXEDBLOCKS; 1568 else { 1569 if ((st->blkmin || st->blkmax) && 1570 (number < st->blkmin || 1571 number > st->blkmax)) { 1572 error = EINVAL; 1573 break; 1574 } 1575 st->flags |= ST_FIXEDBLOCKS; 1576 } 1577 st->blksize = number; 1578 st->flags |= ST_BLOCK_SET; /*XXX */ 1579 goto try_new_value; 1580 1581 case MTSETDNSTY: /* Set density for device and mode */ 1582 /* 1583 * Any number >= 0 and <= 0xff is legal. Numbers 1584 * above 0x80 are 'vendor unique'. 1585 */ 1586 if (number < 0 || number > 255) { 1587 error = EINVAL; 1588 break; 1589 } else 1590 st->density = number; 1591 goto try_new_value; 1592 1593 case MTCMPRESS: 1594 error = st->ops(st, (number == 0) ? 1595 ST_OPS_CMPRSS_OFF : ST_OPS_CMPRSS_ON, 1596 XS_CTL_SILENT); 1597 break; 1598 1599 case MTEWARN: 1600 if (number) 1601 st->flags |= ST_EARLYWARN; 1602 else 1603 st->flags &= ~ST_EARLYWARN; 1604 break; 1605 1606 default: 1607 error = EINVAL; 1608 } 1609 break; 1610 } 1611 case MTIOCIEOT: 1612 case MTIOCEEOT: 1613 break; 1614 1615 case MTIOCRDSPOS: 1616 error = st_rdpos(st, 0, (u_int32_t *) arg); 1617 break; 1618 1619 case MTIOCRDHPOS: 1620 error = st_rdpos(st, 1, (u_int32_t *) arg); 1621 break; 1622 1623 case MTIOCSLOCATE: 1624 error = st_setpos(st, 0, (u_int32_t *) arg); 1625 break; 1626 1627 case MTIOCHLOCATE: 1628 error = st_setpos(st, 1, (u_int32_t *) arg); 1629 break; 1630 1631 1632 default: 1633 error = scsipi_do_ioctl(st->sc_periph, dev, cmd, arg, 1634 flag, l); 1635 break; 1636 } 1637 return (error); 1638 /*-----------------------------*/ 1639 try_new_value: 1640 /* 1641 * Check that the mode being asked for is aggreeable to the 1642 * drive. If not, put it back the way it was. 1643 * 1644 * If in control mode, we can make (persistent) mode changes 1645 * even if no medium is loaded (see st(4)). 1646 */ 1647 if ((STMODE(dev) != CTRL_MODE || (st->flags & ST_MOUNTED) != 0) && 1648 (error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 1649 /* put it back as it was */ 1650 printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); 1651 st->density = hold_density; 1652 st->blksize = hold_blksize; 1653 if (st->blksize) 1654 st->flags |= ST_FIXEDBLOCKS; 1655 else 1656 st->flags &= ~ST_FIXEDBLOCKS; 1657 return (error); 1658 } 1659 /* 1660 * As the drive liked it, if we are setting a new default, 1661 * set it into the structures as such. 1662 * 1663 * The means for deciding this are not finalised yet- but 1664 * if the device was opened in Control Mode, the values 1665 * are persistent now across mounts. 1666 */ 1667 if (STMODE(dev) == CTRL_MODE) { 1668 switch ((short) (mt->mt_op)) { 1669 case MTSETBSIZ: 1670 st->modes[dsty].blksize = st->blksize; 1671 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1672 break; 1673 case MTSETDNSTY: 1674 st->modes[dsty].density = st->density; 1675 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1676 break; 1677 } 1678 } 1679 return (0); 1680 } 1681 1682 /* 1683 * Do a synchronous read. 1684 */ 1685 static int 1686 st_read(struct st_softc *st, char *bf, int size, int flags) 1687 { 1688 struct scsi_rw_tape cmd; 1689 1690 /* 1691 * If it's a null transfer, return immediatly 1692 */ 1693 if (size == 0) 1694 return (0); 1695 memset(&cmd, 0, sizeof(cmd)); 1696 cmd.opcode = READ; 1697 if (st->flags & ST_FIXEDBLOCKS) { 1698 cmd.byte2 |= SRW_FIXED; 1699 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1700 cmd.len); 1701 } else 1702 _lto3b(size, cmd.len); 1703 return (scsipi_command(st->sc_periph, 1704 (void *)&cmd, sizeof(cmd), (void *)bf, size, 0, ST_IO_TIME, NULL, 1705 flags | XS_CTL_DATA_IN)); 1706 } 1707 1708 /* 1709 * issue an erase command 1710 */ 1711 static int 1712 st_erase(struct st_softc *st, int full, int flags) 1713 { 1714 int tmo; 1715 struct scsi_erase cmd; 1716 1717 /* 1718 * Full erase means set LONG bit in erase command, which asks 1719 * the drive to erase the entire unit. Without this bit, we're 1720 * asking the drive to write an erase gap. 1721 */ 1722 memset(&cmd, 0, sizeof(cmd)); 1723 cmd.opcode = ERASE; 1724 if (full) { 1725 cmd.byte2 = SE_LONG; 1726 tmo = ST_SPC_TIME; 1727 } else { 1728 tmo = ST_IO_TIME; 1729 } 1730 1731 /* 1732 * XXX We always do this asynchronously, for now, unless the device 1733 * has the ST_Q_ERASE_NOIMM quirk. How long should we wait if we 1734 * want to (eventually) to it synchronously? 1735 */ 1736 if ((st->quirks & ST_Q_ERASE_NOIMM) == 0) 1737 cmd.byte2 |= SE_IMMED; 1738 1739 return (scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1740 ST_RETRIES, tmo, NULL, flags)); 1741 } 1742 1743 /* 1744 * skip N blocks/filemarks/seq filemarks/eom 1745 */ 1746 static int 1747 st_space(struct st_softc *st, int number, u_int what, int flags) 1748 { 1749 struct scsi_space cmd; 1750 int error; 1751 1752 switch (what) { 1753 case SP_BLKS: 1754 if (st->flags & ST_PER_ACTION) { 1755 if (number > 0) { 1756 st->flags &= ~ST_PER_ACTION; 1757 return (EIO); 1758 } else if (number < 0) { 1759 if (st->flags & ST_AT_FILEMARK) { 1760 /* 1761 * Handling of ST_AT_FILEMARK 1762 * in st_space will fill in the 1763 * right file mark count. 1764 */ 1765 error = st_space(st, 0, SP_FILEMARKS, 1766 flags); 1767 if (error) 1768 return (error); 1769 } 1770 if (st->flags & ST_BLANK_READ) { 1771 st->flags &= ~ST_BLANK_READ; 1772 return (EIO); 1773 } 1774 st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); 1775 } 1776 } 1777 break; 1778 case SP_FILEMARKS: 1779 if (st->flags & ST_EIO_PENDING) { 1780 if (number > 0) { 1781 /* pretend we just discovered the error */ 1782 st->flags &= ~ST_EIO_PENDING; 1783 return (EIO); 1784 } else if (number < 0) { 1785 /* back away from the error */ 1786 st->flags &= ~ST_EIO_PENDING; 1787 } 1788 } 1789 if (st->flags & ST_AT_FILEMARK) { 1790 st->flags &= ~ST_AT_FILEMARK; 1791 number--; 1792 } 1793 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 1794 /* back away from unwritten tape */ 1795 st->flags &= ~ST_BLANK_READ; 1796 number++; /* XXX dubious */ 1797 } 1798 break; 1799 case SP_EOM: 1800 if (st->flags & ST_EOM_PENDING) { 1801 /* we're already there */ 1802 st->flags &= ~ST_EOM_PENDING; 1803 return (0); 1804 } 1805 if (st->flags & ST_EIO_PENDING) { 1806 /* pretend we just discovered the error */ 1807 st->flags &= ~ST_EIO_PENDING; 1808 return (EIO); 1809 } 1810 if (st->flags & ST_AT_FILEMARK) 1811 st->flags &= ~ST_AT_FILEMARK; 1812 break; 1813 } 1814 if (number == 0) 1815 return (0); 1816 1817 memset(&cmd, 0, sizeof(cmd)); 1818 cmd.opcode = SPACE; 1819 cmd.byte2 = what; 1820 _lto3b(number, cmd.number); 1821 1822 st->flags &= ~ST_POSUPDATED; 1823 st->last_ctl_resid = 0; 1824 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1825 0, ST_SPC_TIME, NULL, flags); 1826 1827 if (error == 0 && (st->flags & ST_POSUPDATED) == 0) { 1828 number = number - st->last_ctl_resid; 1829 if (what == SP_BLKS) { 1830 if (st->blkno != -1) { 1831 st->blkno += number; 1832 } 1833 } else if (what == SP_FILEMARKS) { 1834 if (st->fileno != -1) { 1835 st->fileno += number; 1836 if (number > 0) { 1837 st->blkno = 0; 1838 } else if (number < 0) { 1839 st->blkno = -1; 1840 } 1841 } 1842 } else if (what == SP_EOM) { 1843 /* 1844 * This loses us relative position. 1845 */ 1846 st->fileno = st->blkno = -1; 1847 } 1848 } 1849 return (error); 1850 } 1851 1852 /* 1853 * write N filemarks 1854 */ 1855 static int 1856 st_write_filemarks(struct st_softc *st, int number, int flags) 1857 { 1858 int error; 1859 struct scsi_write_filemarks cmd; 1860 1861 /* 1862 * It's hard to write a negative number of file marks. 1863 * Don't try. 1864 */ 1865 if (number < 0) 1866 return (EINVAL); 1867 switch (number) { 1868 case 0: /* really a command to sync the drive's buffers */ 1869 break; 1870 case 1: 1871 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 1872 st->flags &= ~ST_WRITTEN; 1873 else 1874 st->flags |= ST_FM_WRITTEN; 1875 st->flags &= ~ST_PER_ACTION; 1876 break; 1877 default: 1878 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 1879 } 1880 1881 memset(&cmd, 0, sizeof(cmd)); 1882 cmd.opcode = WRITE_FILEMARKS; 1883 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1884 cmd.byte2 = SR_IMMED; 1885 /* 1886 * The ATAPI Onstream DI-30 doesn't support writing filemarks, but 1887 * WRITE_FILEMARKS is still used to flush the buffer 1888 */ 1889 if ((st->quirks & ST_Q_NOFILEMARKS) == 0) 1890 _lto3b(number, cmd.number); 1891 1892 /* XXX WE NEED TO BE ABLE TO GET A RESIDIUAL XXX */ 1893 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1894 0, ST_IO_TIME * 4, NULL, flags); 1895 if (error == 0 && st->fileno != -1) { 1896 st->fileno += number; 1897 } 1898 return (error); 1899 } 1900 1901 /* 1902 * Make sure the right number of file marks is on tape if the 1903 * tape has been written. If the position argument is true, 1904 * leave the tape positioned where it was originally. 1905 * 1906 * nmarks returns the number of marks to skip (or, if position 1907 * true, which were skipped) to get back original position. 1908 */ 1909 static int 1910 st_check_eod(struct st_softc *st, boolean position, int *nmarks, int flags) 1911 { 1912 int error; 1913 1914 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 1915 default: 1916 *nmarks = 0; 1917 return (0); 1918 case ST_WRITTEN: 1919 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 1920 *nmarks = 1; 1921 break; 1922 case ST_WRITTEN | ST_2FM_AT_EOD: 1923 *nmarks = 2; 1924 } 1925 error = st_write_filemarks(st, *nmarks, flags); 1926 if (position && !error) 1927 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 1928 return (error); 1929 } 1930 1931 /* 1932 * load/unload/retension 1933 */ 1934 static int 1935 st_load(struct st_softc *st, u_int type, int flags) 1936 { 1937 int error; 1938 struct scsi_load cmd; 1939 1940 if (type != LD_LOAD) { 1941 int nmarks; 1942 1943 error = st_check_eod(st, FALSE, &nmarks, flags); 1944 if (error) { 1945 printf("%s: failed to write closing filemarks at " 1946 "unload, errno=%d\n", st->sc_dev.dv_xname, error); 1947 return (error); 1948 } 1949 } 1950 if (st->quirks & ST_Q_IGNORE_LOADS) { 1951 if (type == LD_LOAD) { 1952 /* 1953 * If we ignore loads, at least we should try a rewind. 1954 */ 1955 return st_rewind(st, 0, flags); 1956 } 1957 /* otherwise, we should do what's asked of us */ 1958 } 1959 1960 memset(&cmd, 0, sizeof(cmd)); 1961 cmd.opcode = LOAD; 1962 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1963 cmd.byte2 = SR_IMMED; 1964 cmd.how = type; 1965 1966 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1967 ST_RETRIES, ST_SPC_TIME, NULL, flags); 1968 if (error) { 1969 printf("%s: error %d in st_load (op %d)\n", 1970 st->sc_dev.dv_xname, error, type); 1971 } 1972 return (error); 1973 } 1974 1975 /* 1976 * Rewind the device 1977 */ 1978 static int 1979 st_rewind(struct st_softc *st, u_int immediate, int flags) 1980 { 1981 struct scsi_rewind cmd; 1982 int error; 1983 int nmarks; 1984 1985 error = st_check_eod(st, FALSE, &nmarks, flags); 1986 if (error) { 1987 printf("%s: failed to write closing filemarks at " 1988 "rewind, errno=%d\n", st->sc_dev.dv_xname, error); 1989 return (error); 1990 } 1991 st->flags &= ~ST_PER_ACTION; 1992 1993 /* 1994 * ATAPI tapes always need immediate to be set 1995 */ 1996 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1997 immediate = SR_IMMED; 1998 1999 memset(&cmd, 0, sizeof(cmd)); 2000 cmd.opcode = REWIND; 2001 cmd.byte2 = immediate; 2002 2003 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 2004 ST_RETRIES, immediate ? ST_CTL_TIME: ST_SPC_TIME, NULL, flags); 2005 if (error) { 2006 printf("%s: error %d trying to rewind\n", 2007 st->sc_dev.dv_xname, error); 2008 /* lost position */ 2009 st->fileno = st->blkno = -1; 2010 } else { 2011 st->fileno = st->blkno = 0; 2012 } 2013 return (error); 2014 } 2015 2016 static int 2017 st_rdpos(struct st_softc *st, int hard, u_int32_t *blkptr) 2018 { 2019 int error; 2020 u_int8_t posdata[20]; 2021 struct scsi_tape_read_position cmd; 2022 2023 /* 2024 * We try and flush any buffered writes here if we were writing 2025 * and we're trying to get hardware block position. It eats 2026 * up performance substantially, but I'm wary of drive firmware. 2027 * 2028 * I think that *logical* block position is probably okay- 2029 * but hardware block position might have to wait for data 2030 * to hit media to be valid. Caveat Emptor. 2031 */ 2032 2033 if (hard && (st->flags & ST_WRITTEN)) { 2034 /* 2035 * First flush any pending writes... 2036 */ 2037 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 2038 /* 2039 * The latter case is for 'write protected' tapes 2040 * which are too stupid to recognize a zero count 2041 * for writing filemarks as a no-op. 2042 */ 2043 if (error != 0 && error != EACCES && error != EROFS) 2044 return (error); 2045 } 2046 2047 memset(&cmd, 0, sizeof(cmd)); 2048 memset(&posdata, 0, sizeof(posdata)); 2049 cmd.opcode = READ_POSITION; 2050 if (hard) 2051 cmd.byte1 = 1; 2052 2053 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 2054 (void *)&posdata, sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, 2055 XS_CTL_SILENT | XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); 2056 2057 if (error == 0) { 2058 #if 0 2059 printf("posdata:"); 2060 for (hard = 0; hard < sizeof(posdata); hard++) 2061 printf("%02x ", posdata[hard] & 0xff); 2062 printf("\n"); 2063 #endif 2064 if (posdata[0] & 0x4) /* Block Position Unknown */ 2065 error = EINVAL; 2066 else 2067 *blkptr = _4btol(&posdata[4]); 2068 } 2069 return (error); 2070 } 2071 2072 static int 2073 st_setpos(struct st_softc *st, int hard, u_int32_t *blkptr) 2074 { 2075 int error; 2076 struct scsi_tape_locate cmd; 2077 2078 /* 2079 * We used to try and flush any buffered writes here. 2080 * Now we push this onto user applications to either 2081 * flush the pending writes themselves (via a zero count 2082 * WRITE FILEMARKS command) or they can trust their tape 2083 * drive to do this correctly for them. 2084 * 2085 * There are very ugly performance limitations otherwise. 2086 */ 2087 2088 memset(&cmd, 0, sizeof(cmd)); 2089 cmd.opcode = LOCATE; 2090 if (hard) 2091 cmd.byte2 = 1 << 2; 2092 _lto4b(*blkptr, cmd.blkaddr); 2093 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 2094 ST_RETRIES, ST_SPC_TIME, NULL, 0); 2095 /* 2096 * Note file && block number position now unknown (if 2097 * these things ever start being maintained in this driver) 2098 */ 2099 st->fileno = st->blkno = -1; 2100 return (error); 2101 } 2102 2103 2104 /* 2105 * Look at the returned sense and act on the error and determine 2106 * the unix error number to pass back..., 0 (== report no error), 2107 * -1 = retry the operation, -2 continue error processing. 2108 */ 2109 static int 2110 st_interpret_sense(struct scsipi_xfer *xs) 2111 { 2112 struct scsipi_periph *periph = xs->xs_periph; 2113 struct scsi_sense_data *sense = &xs->sense.scsi_sense; 2114 struct buf *bp = xs->bp; 2115 struct st_softc *st = (void *)periph->periph_dev; 2116 int retval = EJUSTRETURN; 2117 int doprint = ((xs->xs_control & XS_CTL_SILENT) == 0); 2118 u_int8_t key; 2119 int32_t info; 2120 2121 /* 2122 * If it isn't a extended or extended/deferred error, let 2123 * the generic code handle it. 2124 */ 2125 if (SSD_RCODE(sense->response_code) != SSD_RCODE_CURRENT && 2126 SSD_RCODE(sense->response_code) != SSD_RCODE_DEFERRED) 2127 return (retval); 2128 2129 if (sense->response_code & SSD_RCODE_VALID) 2130 info = _4btol(sense->info); 2131 else 2132 info = (st->flags & ST_FIXEDBLOCKS) ? 2133 xs->datalen / st->blksize : xs->datalen; 2134 key = SSD_SENSE_KEY(sense->flags); 2135 st->mt_erreg = key; 2136 st->asc = sense->asc; 2137 st->ascq = sense->ascq; 2138 st->mt_resid = (short) info; 2139 2140 if (key == SKEY_NOT_READY && st->asc == 0x4 && st->ascq == 0x1) { 2141 /* Not Ready, Logical Unit Is in Process Of Becoming Ready */ 2142 if (!callout_pending(&periph->periph_callout)) 2143 scsipi_periph_freeze(periph, 1); 2144 callout_reset(&periph->periph_callout, 2145 hz, scsipi_periph_timed_thaw, periph); 2146 return (ERESTART); 2147 } 2148 2149 /* 2150 * If the device is not open yet, let generic handle 2151 */ 2152 if ((periph->periph_flags & PERIPH_OPEN) == 0) { 2153 return (retval); 2154 } 2155 2156 xs->resid = info; 2157 if (st->flags & ST_FIXEDBLOCKS) { 2158 if (bp) { 2159 xs->resid *= st->blksize; 2160 st->last_io_resid = xs->resid; 2161 } else { 2162 st->last_ctl_resid = xs->resid; 2163 } 2164 if (key == SKEY_VOLUME_OVERFLOW) { 2165 st->flags |= ST_EIO_PENDING; 2166 if (bp) 2167 bp->b_resid = xs->resid; 2168 } else if (sense->flags & SSD_EOM) { 2169 if ((st->flags & ST_EARLYWARN) == 0) 2170 st->flags |= ST_EIO_PENDING; 2171 st->flags |= ST_EOM_PENDING; 2172 if (bp) { 2173 #if 0 2174 bp->b_resid = xs->resid; 2175 #else 2176 /* 2177 * Grotesque as it seems, the few times 2178 * I've actually seen a non-zero resid, 2179 * the tape drive actually lied and had 2180 * written all the data! 2181 */ 2182 bp->b_resid = 0; 2183 #endif 2184 } 2185 } 2186 if (sense->flags & SSD_FILEMARK) { 2187 st->flags |= ST_AT_FILEMARK; 2188 if (bp) 2189 bp->b_resid = xs->resid; 2190 if (st->fileno != (daddr_t) -1) { 2191 st->fileno++; 2192 st->blkno = 0; 2193 st->flags |= ST_POSUPDATED; 2194 } 2195 } 2196 if (sense->flags & SSD_ILI) { 2197 st->flags |= ST_EIO_PENDING; 2198 if (bp) 2199 bp->b_resid = xs->resid; 2200 if (sense->response_code & SSD_RCODE_VALID && 2201 (xs->xs_control & XS_CTL_SILENT) == 0) 2202 printf("%s: block wrong size, %d blocks " 2203 "residual\n", st->sc_dev.dv_xname, info); 2204 2205 /* 2206 * This quirk code helps the drive read 2207 * the first tape block, regardless of 2208 * format. That is required for these 2209 * drives to return proper MODE SENSE 2210 * information. 2211 */ 2212 if ((st->quirks & ST_Q_SENSE_HELP) && 2213 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 2214 st->blksize -= 512; 2215 else if ((st->flags & ST_POSUPDATED) == 0) { 2216 if (st->blkno != (daddr_t) -1) { 2217 st->blkno += 2218 (xs->datalen / st->blksize); 2219 st->flags |= ST_POSUPDATED; 2220 } 2221 } 2222 } 2223 /* 2224 * If data wanted and no data was transferred, do it immediately 2225 */ 2226 if (xs->datalen && xs->resid >= xs->datalen) { 2227 if (st->flags & ST_EIO_PENDING) 2228 return (EIO); 2229 if (st->flags & ST_AT_FILEMARK) { 2230 if (bp) 2231 bp->b_resid = xs->resid; 2232 return (0); 2233 } 2234 } 2235 } else { /* must be variable mode */ 2236 if (bp) { 2237 st->last_io_resid = xs->resid; 2238 } else { 2239 st->last_ctl_resid = xs->resid; 2240 } 2241 if (sense->flags & SSD_EOM) { 2242 /* 2243 * The current semantics of this 2244 * driver requires EOM detection 2245 * to return EIO unless early 2246 * warning detection is enabled 2247 * for variable mode (this is always 2248 * on for fixed block mode). 2249 */ 2250 if (st->flags & ST_EARLYWARN) { 2251 st->flags |= ST_EOM_PENDING; 2252 retval = 0; 2253 } else { 2254 retval = EIO; 2255 } 2256 2257 /* 2258 * If it's an unadorned EOM detection, 2259 * suppress printing an error. 2260 */ 2261 if (key == SKEY_NO_SENSE) { 2262 doprint = 0; 2263 } 2264 } else if (sense->flags & SSD_FILEMARK) { 2265 retval = 0; 2266 if (st->fileno != (daddr_t) -1) { 2267 st->fileno++; 2268 st->blkno = 0; 2269 st->flags |= ST_POSUPDATED; 2270 } 2271 } else if (sense->flags & SSD_ILI) { 2272 if (info < 0) { 2273 /* 2274 * The tape record was bigger than the read 2275 * we issued. 2276 */ 2277 if ((xs->xs_control & XS_CTL_SILENT) == 0) { 2278 printf("%s: %d-byte tape record too big" 2279 " for %d-byte user buffer\n", 2280 st->sc_dev.dv_xname, 2281 xs->datalen - info, xs->datalen); 2282 } 2283 retval = EIO; 2284 } else { 2285 retval = 0; 2286 if (st->blkno != (daddr_t) -1) { 2287 st->blkno++; 2288 st->flags |= ST_POSUPDATED; 2289 } 2290 } 2291 } 2292 if (bp) 2293 bp->b_resid = info; 2294 } 2295 2296 #ifndef SCSIPI_DEBUG 2297 if (retval == 0 && key == SKEY_NO_SENSE) 2298 doprint = 0; 2299 #endif 2300 if (key == SKEY_BLANK_CHECK) { 2301 /* 2302 * This quirk code helps the drive read the 2303 * first tape block, regardless of format. That 2304 * is required for these drives to return proper 2305 * MODE SENSE information. 2306 */ 2307 if ((st->quirks & ST_Q_SENSE_HELP) && 2308 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 2309 /* still starting */ 2310 st->blksize -= 512; 2311 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 2312 st->flags |= ST_BLANK_READ; 2313 xs->resid = xs->datalen; 2314 if (bp) { 2315 bp->b_resid = xs->resid; 2316 /* return an EOF */ 2317 } 2318 retval = 0; 2319 /* lost position */ 2320 st->fileno = st->blkno = -1; 2321 } 2322 } 2323 2324 /* 2325 * If generic sense processing will continue, we should not 2326 * print sense info here. 2327 */ 2328 if (retval == EJUSTRETURN) 2329 doprint = 0; 2330 2331 if (doprint) { 2332 #ifdef SCSIVERBOSE 2333 scsipi_print_sense(xs, 0); 2334 #else 2335 scsipi_printaddr(periph); 2336 printf("Sense Key 0x%02x", key); 2337 if ((sense->response_code & SSD_RCODE_VALID) != 0) { 2338 switch (key) { 2339 case SKEY_NOT_READY: 2340 case SKEY_ILLEGAL_REQUEST: 2341 case SKEY_UNIT_ATTENTION: 2342 case SKEY_DATA_PROTECT: 2343 break; 2344 case SKEY_VOLUME_OVERFLOW: 2345 case SKEY_BLANK_CHECK: 2346 printf(", requested size: %d (decimal)", info); 2347 break; 2348 case SKEY_ABORTED_COMMAND: 2349 if (xs->xs_retries) 2350 printf(", retrying"); 2351 printf(", cmd 0x%x, info 0x%x", 2352 xs->cmd->opcode, info); 2353 break; 2354 default: 2355 printf(", info = %d (decimal)", info); 2356 } 2357 } 2358 if (sense->extra_len != 0) { 2359 int n; 2360 printf(", data ="); 2361 for (n = 0; n < sense->extra_len; n++) 2362 printf(" %02x", sense->csi[n]); 2363 } 2364 printf("\n"); 2365 #endif 2366 } 2367 return (retval); 2368 } 2369 2370 /* 2371 * The quirk here is that the drive returns some value to st_mode_sense 2372 * incorrectly until the tape has actually passed by the head. 2373 * 2374 * The method is to set the drive to large fixed-block state (user-specified 2375 * density and 1024-byte blocks), then read and rewind to get it to sense the 2376 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 2377 * work, as a last resort, try variable- length blocks. The result will be 2378 * the ability to do an accurate st_mode_sense. 2379 * 2380 * We know we can do a rewind because we just did a load, which implies rewind. 2381 * Rewind seems preferable to space backward if we have a virgin tape. 2382 * 2383 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 2384 * error processing, both part of st_interpret_sense. 2385 */ 2386 static int 2387 st_touch_tape(struct st_softc *st) 2388 { 2389 char *bf; 2390 int readsize; 2391 int error; 2392 2393 bf = malloc(1024, M_TEMP, M_NOWAIT); 2394 if (bf == NULL) 2395 return (ENOMEM); 2396 2397 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 2398 goto bad; 2399 2400 /* 2401 * If the block size is already known from the 2402 * sense data, use it. Else start probing at 1024. 2403 */ 2404 if (st->media_blksize > 0) 2405 st->blksize = st->media_blksize; 2406 else 2407 st->blksize = 1024; 2408 2409 do { 2410 switch (st->blksize) { 2411 case 512: 2412 case 1024: 2413 readsize = st->blksize; 2414 st->flags |= ST_FIXEDBLOCKS; 2415 break; 2416 default: 2417 readsize = 1; 2418 st->flags &= ~ST_FIXEDBLOCKS; 2419 } 2420 if ((error = st->ops(st, ST_OPS_MODESELECT, XS_CTL_SILENT)) 2421 != 0) { 2422 /* 2423 * The device did not agree with the proposed 2424 * block size. If we exhausted our options, 2425 * return failure, else try another. 2426 */ 2427 if (readsize == 1) 2428 goto bad; 2429 st->blksize -= 512; 2430 continue; 2431 } 2432 st_read(st, bf, readsize, XS_CTL_SILENT); /* XXX */ 2433 if ((error = st_rewind(st, 0, 0)) != 0) { 2434 bad: free(bf, M_TEMP); 2435 return (error); 2436 } 2437 } while (readsize != 1 && readsize > st->blksize); 2438 2439 free(bf, M_TEMP); 2440 return (0); 2441 } 2442 2443 static int 2444 stdump(dev_t dev, daddr_t blkno, caddr_t va, size_t size) 2445 { 2446 2447 /* Not implemented. */ 2448 return (ENXIO); 2449 } 2450 2451 int 2452 sysctl_hw_tapenames(SYSCTLFN_ARGS) 2453 { 2454 char bf[TAPENAMELEN + 1]; 2455 char *where = oldp; 2456 struct tape *tapep; 2457 size_t needed, left, slen; 2458 int error, first; 2459 2460 if (newp != NULL) 2461 return (EPERM); 2462 if (namelen != 0) 2463 return (EINVAL); 2464 2465 first = 1; 2466 error = 0; 2467 needed = 0; 2468 left = *oldlenp; 2469 2470 simple_lock(&tapelist_slock); 2471 for (tapep = TAILQ_FIRST(&tapelist); tapep != NULL; 2472 tapep = TAILQ_NEXT(tapep, link)) { 2473 if (where == NULL) 2474 needed += strlen(tapep->name) + 1; 2475 else { 2476 memset(bf, 0, sizeof(bf)); 2477 if (first) { 2478 strncpy(bf, tapep->name, sizeof(bf)); 2479 first = 0; 2480 } else { 2481 bf[0] = ' '; 2482 strncpy(bf + 1, tapep->name, sizeof(bf) - 1); 2483 } 2484 bf[TAPENAMELEN] = '\0'; 2485 slen = strlen(bf); 2486 if (left < slen + 1) 2487 break; 2488 /* +1 to copy out the trailing NUL byte */ 2489 error = copyout(bf, where, slen + 1); 2490 if (error) 2491 break; 2492 where += slen; 2493 needed += slen; 2494 left -= slen; 2495 } 2496 } 2497 simple_unlock(&tapelist_slock); 2498 *oldlenp = needed; 2499 return (error); 2500 } 2501 2502 int 2503 sysctl_hw_tapestats(SYSCTLFN_ARGS) 2504 { 2505 struct tape_sysctl stape; 2506 struct tape *tapep; 2507 char *where = oldp; 2508 size_t tocopy, left; 2509 int error; 2510 2511 if (newp != NULL) 2512 return (EPERM); 2513 2514 tocopy = name[0]; 2515 2516 if (where == NULL) { 2517 *oldlenp = tape_count * tocopy; 2518 return (0); 2519 } 2520 2521 error = 0; 2522 left = *oldlenp; 2523 memset(&stape, 0, sizeof(stape)); 2524 *oldlenp = 0; 2525 2526 simple_lock(&tapelist_slock); 2527 TAILQ_FOREACH(tapep, &tapelist, link) { 2528 if (left < tocopy) 2529 break; 2530 strncpy(stape.name, tapep->name, sizeof(stape.name)); 2531 stape.xfer = tapep->rxfer + tapep->wxfer; 2532 stape.rxfer = tapep->rxfer; 2533 stape.wxfer = tapep->wxfer; 2534 stape.bytes = tapep->rbytes + tapep->wbytes; 2535 stape.rbytes = tapep->rbytes; 2536 stape.wbytes = tapep->wbytes; 2537 stape.attachtime_sec = tapep->attachtime.tv_sec; 2538 stape.attachtime_usec = tapep->attachtime.tv_usec; 2539 stape.timestamp_sec = tapep->timestamp.tv_sec; 2540 stape.timestamp_usec = tapep->timestamp.tv_usec; 2541 stape.time_sec = tapep->time.tv_sec; 2542 stape.time_usec = tapep->time.tv_usec; 2543 stape.busy = tapep->busy; 2544 2545 error = copyout(&stape, where, min(tocopy, sizeof(stape))); 2546 if (error) 2547 break; 2548 where += tocopy; 2549 *oldlenp += tocopy; 2550 left -= tocopy; 2551 } 2552 simple_unlock(&tapelist_slock); 2553 return (error); 2554 } 2555 2556 struct tape * 2557 drive_attach(char *name) 2558 { 2559 struct tape *stats; 2560 2561 /* Allocate and initialise statistics */ 2562 stats = (struct tape *) malloc(sizeof(struct tape), M_DEVBUF, 2563 M_WAITOK); 2564 stats->rxfer = stats->wxfer = stats->rbytes = 0; 2565 stats->wbytes = stats->busy = 0; 2566 2567 /* 2568 * Set the attached timestamp. 2569 */ 2570 getmicrouptime(&stats->attachtime); 2571 2572 /* and clear the utilisation time */ 2573 timerclear(&stats->time); 2574 2575 /* link the tape drive to the tapelist */ 2576 simple_lock(&tapelist_slock); 2577 TAILQ_INSERT_TAIL(&tapelist, stats, link); 2578 tape_count++; 2579 simple_unlock(&tapelist_slock); 2580 stats->name = name; 2581 2582 return stats; 2583 } 2584 2585 SYSCTL_SETUP(sysctl_tape_stats_setup, "sysctl tape stats setup") 2586 { 2587 sysctl_createv(clog, 0, NULL, NULL, 2588 CTLFLAG_PERMANENT, 2589 CTLTYPE_STRING, "tapenames", 2590 SYSCTL_DESCR("List of tape devices present"), 2591 sysctl_hw_tapenames, 0, NULL, 0, 2592 CTL_HW, HW_TAPENAMES, CTL_EOL); 2593 sysctl_createv(clog, 0, NULL, NULL, 2594 CTLFLAG_PERMANENT, 2595 CTLTYPE_STRUCT, "tapestats", 2596 SYSCTL_DESCR("Statistics on tape drive operation"), 2597 sysctl_hw_tapestats, 0, NULL, 0, 2598 CTL_HW, HW_TAPESTATS, CTL_EOL); 2599 } 2600
Indexes created Fri Sep 26 20:09:58 GMT 2025