st.c revision 1.226.2.1
1 /* $NetBSD: st.c,v 1.226.2.1 2019/03/07 16:49:10 martin 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 1.226.2.1 2019/03/07 16:49:10 martin Exp $"); 54 55 #include "opt_scsi.h" 56 57 #include <sys/param.h> 58 #include <sys/systm.h> 59 #include <sys/fcntl.h> 60 #include <sys/errno.h> 61 #include <sys/ioctl.h> 62 #include <sys/malloc.h> 63 #include <sys/buf.h> 64 #include <sys/bufq.h> 65 #include <sys/proc.h> 66 #include <sys/mtio.h> 67 #include <sys/device.h> 68 #include <sys/conf.h> 69 #include <sys/kernel.h> 70 #include <sys/vnode.h> 71 #include <sys/iostat.h> 72 #include <sys/sysctl.h> 73 74 #include <dev/scsipi/scsi_spc.h> 75 #include <dev/scsipi/scsipi_all.h> 76 #include <dev/scsipi/scsi_all.h> 77 #include <dev/scsipi/scsi_tape.h> 78 #include <dev/scsipi/scsipiconf.h> 79 #include <dev/scsipi/scsipi_base.h> 80 #include <dev/scsipi/stvar.h> 81 82 /* Defines for device specific stuff */ 83 #define DEF_FIXED_BSIZE 512 84 85 #define STMODE(z) ( minor(z) & 0x03) 86 #define STDSTY(z) ((minor(z) >> 2) & 0x03) 87 #define STUNIT(z) ((minor(z) >> 4) ) 88 #define STNMINOR 16 89 90 #define NORMAL_MODE 0 91 #define NOREW_MODE 1 92 #define EJECT_MODE 2 93 #define CTRL_MODE 3 94 95 #ifndef ST_MOUNT_DELAY 96 #define ST_MOUNT_DELAY 0 97 #endif 98 99 static dev_type_open(stopen); 100 static dev_type_close(stclose); 101 static dev_type_read(stread); 102 static dev_type_write(stwrite); 103 static dev_type_ioctl(stioctl); 104 static dev_type_strategy(ststrategy); 105 static dev_type_dump(stdump); 106 107 const struct bdevsw st_bdevsw = { 108 .d_open = stopen, 109 .d_close = stclose, 110 .d_strategy = ststrategy, 111 .d_ioctl = stioctl, 112 .d_dump = stdump, 113 .d_psize = nosize, 114 .d_discard = nodiscard, 115 .d_flag = D_TAPE 116 }; 117 118 const struct cdevsw st_cdevsw = { 119 .d_open = stopen, 120 .d_close = stclose, 121 .d_read = stread, 122 .d_write = stwrite, 123 .d_ioctl = stioctl, 124 .d_stop = nostop, 125 .d_tty = notty, 126 .d_poll = nopoll, 127 .d_mmap = nommap, 128 .d_kqfilter = nokqfilter, 129 .d_discard = nodiscard, 130 .d_flag = D_TAPE 131 }; 132 133 /* 134 * Define various devices that we know mis-behave in some way, 135 * and note how they are bad, so we can correct for them 136 */ 137 138 static const struct st_quirk_inquiry_pattern st_quirk_patterns[] = { 139 {{T_SEQUENTIAL, T_REMOV, 140 " ", " ", " "}, {0, 0, { 141 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 142 {ST_Q_FORCE_BLKSIZE, 512, QIC_24}, /* minor 4-7 */ 143 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_1600}, /* minor 8-11 */ 144 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_6250} /* minor 12-15 */ 145 }}}, 146 {{T_SEQUENTIAL, T_REMOV, 147 "TANDBERG", " TDC 3600 ", ""}, {0, 12, { 148 {0, 0, 0}, /* minor 0-3 */ 149 {ST_Q_FORCE_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 150 {0, 0, QIC_150}, /* minor 8-11 */ 151 {0, 0, QIC_120} /* minor 12-15 */ 152 }}}, 153 {{T_SEQUENTIAL, T_REMOV, 154 "TANDBERG", " TDC 3800 ", ""}, {0, 0, { 155 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 156 {0, 0, QIC_525}, /* minor 4-7 */ 157 {0, 0, QIC_150}, /* minor 8-11 */ 158 {0, 0, QIC_120} /* minor 12-15 */ 159 }}}, 160 {{T_SEQUENTIAL, T_REMOV, 161 "TANDBERG", " SLR5 4/8GB ", ""}, {0, 0, { 162 {ST_Q_FORCE_BLKSIZE, 1024, 0}, /* minor 0-3 */ 163 {0, 0, 0}, /* minor 4-7 */ 164 {0, 0, 0}, /* minor 8-11 */ 165 {0, 0, 0} /* minor 12-15 */ 166 }}}, 167 /* 168 * lacking a manual for the 4200, it's not clear what the 169 * specific density codes should be- the device is a 2.5GB 170 * capable QIC drive, those density codes aren't readily 171 * availabel. The 'default' will just have to do. 172 */ 173 {{T_SEQUENTIAL, T_REMOV, 174 "TANDBERG", " TDC 4200 ", ""}, {0, 0, { 175 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 176 {0, 0, QIC_525}, /* minor 4-7 */ 177 {0, 0, QIC_150}, /* minor 8-11 */ 178 {0, 0, QIC_120} /* minor 12-15 */ 179 }}}, 180 /* 181 * At least -005 and -007 need this. I'll assume they all do unless I 182 * hear otherwise. - mycroft, 31MAR1994 183 */ 184 {{T_SEQUENTIAL, T_REMOV, 185 "ARCHIVE ", "VIPER 2525 25462", ""}, {0, 0, { 186 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 187 {ST_Q_SENSE_HELP, 0, QIC_525}, /* minor 4-7 */ 188 {0, 0, QIC_150}, /* minor 8-11 */ 189 {0, 0, QIC_120} /* minor 12-15 */ 190 }}}, 191 /* 192 * One user reports that this works for his tape drive. It probably 193 * needs more work. - mycroft, 09APR1994 194 */ 195 {{T_SEQUENTIAL, T_REMOV, 196 "SANKYO ", "CP525 ", ""}, {0, 0, { 197 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 198 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 199 {0, 0, QIC_150}, /* minor 8-11 */ 200 {0, 0, QIC_120} /* minor 12-15 */ 201 }}}, 202 {{T_SEQUENTIAL, T_REMOV, 203 "ANRITSU ", "DMT780 ", ""}, {0, 0, { 204 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 205 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 206 {0, 0, QIC_150}, /* minor 8-11 */ 207 {0, 0, QIC_120} /* minor 12-15 */ 208 }}}, 209 {{T_SEQUENTIAL, T_REMOV, 210 "ARCHIVE ", "VIPER 150 21247", ""}, {ST_Q_ERASE_NOIMM, 12, { 211 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 212 {0, 0, QIC_150}, /* minor 4-7 */ 213 {0, 0, QIC_120}, /* minor 8-11 */ 214 {0, 0, QIC_24} /* minor 12-15 */ 215 }}}, 216 {{T_SEQUENTIAL, T_REMOV, 217 "ARCHIVE ", "VIPER 150 21531", ""}, {ST_Q_ERASE_NOIMM, 12, { 218 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 219 {0, 0, QIC_150}, /* minor 4-7 */ 220 {0, 0, QIC_120}, /* minor 8-11 */ 221 {0, 0, QIC_24} /* minor 12-15 */ 222 }}}, 223 {{T_SEQUENTIAL, T_REMOV, 224 "WANGTEK ", "5099ES SCSI", ""}, {0, 0, { 225 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 226 {0, 0, QIC_11}, /* minor 4-7 */ 227 {0, 0, QIC_24}, /* minor 8-11 */ 228 {0, 0, QIC_24} /* minor 12-15 */ 229 }}}, 230 {{T_SEQUENTIAL, T_REMOV, 231 "WANGTEK ", "5150ES SCSI", ""}, {0, 0, { 232 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 233 {0, 0, QIC_24}, /* minor 4-7 */ 234 {0, 0, QIC_120}, /* minor 8-11 */ 235 {0, 0, QIC_150} /* minor 12-15 */ 236 }}}, 237 {{T_SEQUENTIAL, T_REMOV, 238 "WANGTEK ", "5525ES SCSI REV7", ""}, {0, 0, { 239 {0, 0, 0}, /* minor 0-3 */ 240 {ST_Q_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 241 {0, 0, QIC_150}, /* minor 8-11 */ 242 {0, 0, QIC_120} /* minor 12-15 */ 243 }}}, 244 {{T_SEQUENTIAL, T_REMOV, 245 "WangDAT ", "Model 1300 ", ""}, {0, 0, { 246 {0, 0, 0}, /* minor 0-3 */ 247 {ST_Q_FORCE_BLKSIZE, 512, DDS}, /* minor 4-7 */ 248 {ST_Q_FORCE_BLKSIZE, 1024, DDS}, /* minor 8-11 */ 249 {ST_Q_FORCE_BLKSIZE, 0, DDS} /* minor 12-15 */ 250 }}}, 251 {{T_SEQUENTIAL, T_REMOV, 252 "EXABYTE ", "EXB-8200 ", "263H"}, {0, 5, { 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 "STK", "9490", ""}, 260 {ST_Q_FORCE_BLKSIZE, 0, { 261 {0, 0, 0}, /* minor 0-3 */ 262 {0, 0, 0}, /* minor 4-7 */ 263 {0, 0, 0}, /* minor 8-11 */ 264 {0, 0, 0} /* minor 12-15 */ 265 }}}, 266 {{T_SEQUENTIAL, T_REMOV, 267 "STK", "SD-3", ""}, 268 {ST_Q_FORCE_BLKSIZE, 0, { 269 {0, 0, 0}, /* minor 0-3 */ 270 {0, 0, 0}, /* minor 4-7 */ 271 {0, 0, 0}, /* minor 8-11 */ 272 {0, 0, 0} /* minor 12-15 */ 273 }}}, 274 {{T_SEQUENTIAL, T_REMOV, 275 "IBM", "03590", ""}, {ST_Q_IGNORE_LOADS, 0, { 276 {0, 0, 0}, /* minor 0-3 */ 277 {0, 0, 0}, /* minor 4-7 */ 278 {0, 0, 0}, /* minor 8-11 */ 279 {0, 0, 0} /* minor 12-15 */ 280 }}}, 281 {{T_SEQUENTIAL, T_REMOV, 282 "HP ", "T4000s ", ""}, {ST_Q_UNIMODAL, 0, { 283 {0, 0, QIC_3095}, /* minor 0-3 */ 284 {0, 0, QIC_3095}, /* minor 4-7 */ 285 {0, 0, QIC_3095}, /* minor 8-11 */ 286 {0, 0, QIC_3095}, /* minor 12-15 */ 287 }}}, 288 #if 0 289 {{T_SEQUENTIAL, T_REMOV, 290 "EXABYTE ", "EXB-8200 ", ""}, {0, 12, { 291 {0, 0, 0}, /* minor 0-3 */ 292 {0, 0, 0}, /* minor 4-7 */ 293 {0, 0, 0}, /* minor 8-11 */ 294 {0, 0, 0} /* minor 12-15 */ 295 }}}, 296 #endif 297 {{T_SEQUENTIAL, T_REMOV, 298 "TEAC ", "MT-2ST/N50 ", ""}, {ST_Q_IGNORE_LOADS, 0, { 299 {0, 0, 0}, /* minor 0-3 */ 300 {0, 0, 0}, /* minor 4-7 */ 301 {0, 0, 0}, /* minor 8-11 */ 302 {0, 0, 0} /* minor 12-15 */ 303 }}}, 304 {{T_SEQUENTIAL, T_REMOV, 305 "OnStream", "ADR50 Drive", ""}, {ST_Q_UNIMODAL, 0, { 306 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 307 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 4-7 */ 308 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 8-11 */ 309 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 12-15 */ 310 }}}, 311 {{T_SEQUENTIAL, T_REMOV, 312 "OnStream DI-30", "", "1.0"}, {ST_Q_NOFILEMARKS, 0, { 313 {0, 0, 0}, /* minor 0-3 */ 314 {0, 0, 0}, /* minor 4-7 */ 315 {0, 0, 0}, /* minor 8-11 */ 316 {0, 0, 0} /* minor 12-15 */ 317 }}}, 318 {{T_SEQUENTIAL, T_REMOV, 319 "NCR H621", "0-STD-03-46F880 ", ""}, {ST_Q_NOPREVENT, 0, { 320 {0, 0, 0}, /* minor 0-3 */ 321 {0, 0, 0}, /* minor 4-7 */ 322 {0, 0, 0}, /* minor 8-11 */ 323 {0, 0, 0} /* minor 12-15 */ 324 }}}, 325 {{T_SEQUENTIAL, T_REMOV, 326 "Seagate STT3401A", "hp0atxa", ""}, {0, 0, { 327 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 328 {ST_Q_FORCE_BLKSIZE, 1024, 0}, /* minor 4-7 */ 329 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 8-11 */ 330 {ST_Q_FORCE_BLKSIZE, 512, 0} /* minor 12-15 */ 331 }}}, 332 }; 333 334 #define NOEJECT 0 335 #define EJECT 1 336 337 static void st_identify_drive(struct st_softc *, 338 struct scsipi_inquiry_pattern *); 339 static void st_loadquirks(struct st_softc *); 340 static int st_mount_tape(dev_t, int); 341 static void st_unmount(struct st_softc *, boolean); 342 static int st_decide_mode(struct st_softc *, boolean); 343 static void ststart(struct scsipi_periph *); 344 static void strestart(void *); 345 static void stdone(struct scsipi_xfer *, int); 346 static int st_read(struct st_softc *, char *, int, int); 347 static int st_space(struct st_softc *, int, u_int, int); 348 static int st_write_filemarks(struct st_softc *, int, int); 349 static int st_check_eod(struct st_softc *, boolean, int *, int); 350 static int st_load(struct st_softc *, u_int, int); 351 static int st_rewind(struct st_softc *, u_int, int); 352 static int st_interpret_sense(struct scsipi_xfer *); 353 static int st_touch_tape(struct st_softc *); 354 static int st_erase(struct st_softc *, int full, int flags); 355 static int st_rdpos(struct st_softc *, int, uint32_t *); 356 static int st_setpos(struct st_softc *, int, uint32_t *); 357 358 static const struct scsipi_periphsw st_switch = { 359 st_interpret_sense, 360 ststart, 361 NULL, 362 stdone 363 }; 364 365 #if defined(ST_ENABLE_EARLYWARN) 366 #define ST_INIT_FLAGS ST_EARLYWARN 367 #else 368 #define ST_INIT_FLAGS 0 369 #endif 370 371 /* 372 * The routine called by the low level scsi routine when it discovers 373 * A device suitable for this driver 374 */ 375 void 376 stattach(device_t parent, device_t self, void *aux) 377 { 378 struct st_softc *st = device_private(self); 379 struct scsipibus_attach_args *sa = aux; 380 struct scsipi_periph *periph = sa->sa_periph; 381 382 SC_DEBUG(periph, SCSIPI_DB2, ("stattach: ")); 383 st->sc_dev = self; 384 385 /* Store information needed to contact our base driver */ 386 st->sc_periph = periph; 387 periph->periph_dev = st->sc_dev; 388 periph->periph_switch = &st_switch; 389 390 /* Set initial flags */ 391 st->flags = ST_INIT_FLAGS; 392 393 /* Set up the buf queue for this device */ 394 bufq_alloc(&st->buf_queue, "fcfs", 0); 395 callout_init(&st->sc_callout, 0); 396 397 /* 398 * Check if the drive is a known criminal and take 399 * Any steps needed to bring it into line 400 */ 401 st_identify_drive(st, &sa->sa_inqbuf); 402 printf("\n"); 403 /* Use the subdriver to request information regarding the drive. */ 404 printf("%s : %s", device_xname(st->sc_dev), st->quirkdata 405 ? "quirks apply, " : ""); 406 if (scsipi_test_unit_ready(periph, 407 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE) || 408 st->ops(st, ST_OPS_MODESENSE, 409 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE)) 410 printf("drive empty\n"); 411 else { 412 printf("density code %d, ", st->media_density); 413 if (st->media_blksize > 0) 414 printf("%d-byte", st->media_blksize); 415 else 416 printf("variable"); 417 printf(" blocks, write-%s\n", 418 (st->flags & ST_READONLY) ? "protected" : "enabled"); 419 } 420 421 st->stats = iostat_alloc(IOSTAT_TAPE, parent, 422 device_xname(st->sc_dev)); 423 424 rnd_attach_source(&st->rnd_source, device_xname(st->sc_dev), 425 RND_TYPE_TAPE, RND_FLAG_DEFAULT); 426 } 427 428 int 429 stdetach(device_t self, int flags) 430 { 431 struct st_softc *st = device_private(self); 432 int s, bmaj, cmaj, mn; 433 434 /* locate the major number */ 435 bmaj = bdevsw_lookup_major(&st_bdevsw); 436 cmaj = cdevsw_lookup_major(&st_cdevsw); 437 438 /* kill any pending restart */ 439 callout_stop(&st->sc_callout); 440 441 s = splbio(); 442 443 /* Kill off any queued buffers. */ 444 bufq_drain(st->buf_queue); 445 446 bufq_free(st->buf_queue); 447 448 /* Kill off any pending commands. */ 449 scsipi_kill_pending(st->sc_periph); 450 451 splx(s); 452 453 /* Nuke the vnodes for any open instances */ 454 mn = STUNIT(device_unit(self)); 455 vdevgone(bmaj, mn, mn+STNMINOR-1, VBLK); 456 vdevgone(cmaj, mn, mn+STNMINOR-1, VCHR); 457 458 iostat_free(st->stats); 459 460 /* Unhook the entropy source. */ 461 rnd_detach_source(&st->rnd_source); 462 463 return 0; 464 } 465 466 /* 467 * Use the inquiry routine in 'scsi_base' to get drive info so we can 468 * Further tailor our behaviour. 469 */ 470 static void 471 st_identify_drive(struct st_softc *st, struct scsipi_inquiry_pattern *inqbuf) 472 { 473 const struct st_quirk_inquiry_pattern *finger; 474 int priority; 475 476 finger = scsipi_inqmatch(inqbuf, 477 st_quirk_patterns, 478 sizeof(st_quirk_patterns) / sizeof(st_quirk_patterns[0]), 479 sizeof(st_quirk_patterns[0]), &priority); 480 if (priority != 0) { 481 st->quirkdata = &finger->quirkdata; 482 st->drive_quirks = finger->quirkdata.quirks; 483 st->quirks = finger->quirkdata.quirks; /* start value */ 484 st->page_0_size = finger->quirkdata.page_0_size; 485 KASSERT(st->page_0_size <= MAX_PAGE_0_SIZE); 486 st_loadquirks(st); 487 } 488 } 489 490 /* 491 * initialise the subdevices to the default (QUIRK) state. 492 * this will remove any setting made by the system operator or previous 493 * operations. 494 */ 495 static void 496 st_loadquirks(struct st_softc *st) 497 { 498 const struct modes *mode; 499 struct modes *mode2; 500 int i; 501 502 mode = st->quirkdata->modes; 503 mode2 = st->modes; 504 for (i = 0; i < 4; i++) { 505 memset(mode2, 0, sizeof(struct modes)); 506 st->modeflags[i] &= ~(BLKSIZE_SET_BY_QUIRK | 507 DENSITY_SET_BY_QUIRK | BLKSIZE_SET_BY_USER | 508 DENSITY_SET_BY_USER); 509 if ((mode->quirks | st->drive_quirks) & ST_Q_FORCE_BLKSIZE) { 510 mode2->blksize = mode->blksize; 511 st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; 512 } 513 if (mode->density) { 514 mode2->density = mode->density; 515 st->modeflags[i] |= DENSITY_SET_BY_QUIRK; 516 } 517 mode2->quirks |= mode->quirks; 518 mode++; 519 mode2++; 520 } 521 } 522 523 /* open the device. */ 524 static int 525 stopen(dev_t dev, int flags, int mode, struct lwp *l) 526 { 527 u_int stmode, dsty; 528 int error, sflags, unit, tries, ntries; 529 struct st_softc *st; 530 struct scsipi_periph *periph; 531 struct scsipi_adapter *adapt; 532 533 unit = STUNIT(dev); 534 st = device_lookup_private(&st_cd, unit); 535 if (st == NULL) 536 return ENXIO; 537 538 stmode = STMODE(dev); 539 dsty = STDSTY(dev); 540 541 periph = st->sc_periph; 542 adapt = periph->periph_channel->chan_adapter; 543 544 SC_DEBUG(periph, SCSIPI_DB1, 545 ("open: dev=0x%"PRIx64" (unit %d (of %d))\n", dev, unit, 546 st_cd.cd_ndevs)); 547 548 /* Only allow one at a time */ 549 if (periph->periph_flags & PERIPH_OPEN) { 550 aprint_error_dev(st->sc_dev, "already open\n"); 551 return EBUSY; 552 } 553 554 if ((error = scsipi_adapter_addref(adapt)) != 0) 555 return error; 556 557 /* clear any latched errors. */ 558 st->mt_resid = 0; 559 st->mt_erreg = 0; 560 st->asc = 0; 561 st->ascq = 0; 562 563 /* 564 * Catch any unit attention errors. Be silent about this 565 * unless we're already mounted. We ignore media change 566 * if we're in control mode or not mounted yet. 567 */ 568 if ((st->flags & ST_MOUNTED) == 0 || stmode == CTRL_MODE) { 569 #ifdef SCSIDEBUG 570 sflags = XS_CTL_IGNORE_MEDIA_CHANGE; 571 #else 572 sflags = XS_CTL_SILENT|XS_CTL_IGNORE_MEDIA_CHANGE; 573 #endif 574 } else 575 sflags = 0; 576 577 /* 578 * If we're already mounted or we aren't configured for 579 * a mount delay, only try a test unit ready once. Otherwise, 580 * try up to ST_MOUNT_DELAY times with a rest interval of 581 * one second between each try. 582 */ 583 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0) 584 ntries = 1; 585 else 586 ntries = ST_MOUNT_DELAY; 587 588 for (error = tries = 0; tries < ntries; tries++) { 589 int slpintr, oflags; 590 591 /* 592 * If we had no error, or we're opening the control mode 593 * device, we jump out right away. 594 */ 595 error = scsipi_test_unit_ready(periph, sflags); 596 if (error == 0 || stmode == CTRL_MODE) 597 break; 598 599 /* 600 * We had an error. 601 * 602 * If we're already mounted or we aren't configured for 603 * a mount delay, or the error isn't a NOT READY error, 604 * skip to the error exit now. 605 */ 606 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0 || 607 (st->mt_key != SKEY_NOT_READY)) { 608 device_printf(st->sc_dev, 609 "mount error (sense key=%d) - " 610 "terminating mount session\n", 611 st->mt_key); 612 /* 613 * the following should not trigger unless 614 * something serious happened while the device 615 * was open (PREVENT MEDIUM REMOVAL in effect) 616 */ 617 if (st->flags & ST_WRITTEN && 618 st->mt_key == SKEY_UNIT_ATTENTION) { 619 /* 620 * device / media state may have changed 621 * refrain from writing missing file marks 622 * onto potentially newly inserted/formatted 623 * media (e. g. emergency EJECT/RESET/etc.) 624 */ 625 st->flags &= ~(ST_WRITTEN|ST_FM_WRITTEN); 626 627 device_printf(st->sc_dev, 628 "CAUTION: file marks/data may be missing" 629 " - ASC = 0x%02x, ASCQ = 0x%02x\n", 630 st->asc, st->ascq); 631 } 632 goto bad; 633 } 634 635 /* clear any latched errors. */ 636 st->mt_resid = 0; 637 st->mt_erreg = 0; 638 st->asc = 0; 639 st->ascq = 0; 640 641 /* 642 * Fake that we have the device open so 643 * we block other apps from getting in. 644 */ 645 oflags = periph->periph_flags; 646 periph->periph_flags |= PERIPH_OPEN; 647 648 slpintr = kpause("stload", true, hz, NULL); 649 650 periph->periph_flags = oflags; /* restore flags */ 651 if (slpintr != 0 && slpintr != EWOULDBLOCK) { 652 goto bad; 653 } 654 } 655 656 657 /* 658 * If the mode is 3 (e.g. minor = 3,7,11,15) then the device has 659 * been opened to set defaults and perform other, usually non-I/O 660 * related, operations. In this case, do a quick check to see 661 * whether the unit actually had a tape loaded (this will be known 662 * as to whether or not we got a NOT READY for the above 663 * unit attention). If a tape is there, go do a mount sequence. 664 */ 665 if (stmode == CTRL_MODE && st->mt_key == SKEY_NOT_READY) { 666 periph->periph_flags |= PERIPH_OPEN; 667 return 0; 668 } 669 670 /* 671 * If we get this far and had an error set, that means we failed 672 * to pass the 'test unit ready' test for the non-controlmode device, 673 * so we bounce the open. 674 */ 675 if (error) 676 return error; 677 678 /* Else, we're now committed to saying we're open. */ 679 periph->periph_flags |= PERIPH_OPEN; /* unit attn are now errors */ 680 681 /* 682 * If it's a different mode, or if the media has been 683 * invalidated, unmount the tape from the previous 684 * session but continue with open processing 685 */ 686 if (st->last_dsty != dsty || 687 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 688 st_unmount(st, NOEJECT); 689 690 /* 691 * If we are not mounted, then we should start a new 692 * mount session. 693 */ 694 if (!(st->flags & ST_MOUNTED)) { 695 if ((error = st_mount_tape(dev, flags)) != 0) 696 goto bad; 697 st->last_dsty = dsty; 698 } 699 if (!(st->quirks & ST_Q_NOPREVENT)) { 700 scsipi_prevent(periph, SPAMR_PREVENT_DT, 701 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 702 } 703 704 SC_DEBUG(periph, SCSIPI_DB2, ("open complete\n")); 705 return 0; 706 707 bad: 708 st_unmount(st, NOEJECT); 709 scsipi_adapter_delref(adapt); 710 periph->periph_flags &= ~PERIPH_OPEN; 711 return error; 712 } 713 714 static int 715 stclose(dev_t dev, int flags, int mode, struct lwp *l) 716 { 717 int stxx, error = 0; 718 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(dev)); 719 struct scsipi_periph *periph = st->sc_periph; 720 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 721 722 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("closing\n")); 723 724 /* 725 * Make sure that a tape opened in write-only mode will have 726 * file marks written on it when closed, even if not written to. 727 * 728 * This is for SUN compatibility. Actually, the Sun way of 729 * things is to: 730 * 731 * only write filemarks if there are fmks to be written and 732 * - open for write (possibly read/write) 733 * - the last operation was a write 734 * or: 735 * - opened for wronly 736 * - no data was written (including filemarks) 737 */ 738 739 stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); 740 if ((flags & FWRITE) != 0) { 741 int nm = 0; 742 #ifdef ST_SUNCOMPAT 743 /* 744 * on request only 745 * original compat code has not been working 746 * since ~1998 747 */ 748 if ((flags & O_ACCMODE) == FWRITE && (stxx == 0)) { 749 st->flags |= ST_WRITTEN; 750 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 751 ("SUN compatibility: write FM(s) at close\n")); 752 } 753 #endif 754 error = st_check_eod(st, FALSE, &nm, 0); 755 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 756 ("wrote %d FM(s) at close error=%d\n", nm, error)); 757 } 758 759 /* Allow robots to eject tape if needed. */ 760 if (!(st->quirks & ST_Q_NOPREVENT)) { 761 scsipi_prevent(periph, SPAMR_ALLOW, 762 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 763 } 764 765 switch (STMODE(dev)) { 766 case NORMAL_MODE: 767 st_unmount(st, NOEJECT); 768 break; 769 case NOREW_MODE: 770 case CTRL_MODE: 771 /* 772 * Leave mounted unless media seems to have been removed. 773 * 774 * Otherwise, if we're to terminate a tape with more than one 775 * filemark [ and because we're not rewinding here ], backspace 776 * one filemark so that later appends will see an unbroken 777 * sequence of: 778 * 779 * file - FMK - file - FMK ... file - FMK FMK (EOM) 780 */ 781 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 782 st_unmount(st, NOEJECT); 783 } else if (error == 0) { 784 /* 785 * ST_WRITTEN was preserved from above. 786 * 787 * All we need to know here is: 788 * 789 * Were we writing this tape and was the last 790 * operation a write? 791 * 792 * Are there supposed to be 2FM at EOD? 793 * 794 * If both statements are true, then we backspace 795 * one filemark. 796 */ 797 stxx &= ~ST_FM_WRITTEN; 798 stxx |= (st->flags & ST_2FM_AT_EOD); 799 if ((flags & FWRITE) != 0 && 800 (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { 801 error = st_space(st, -1, SP_FILEMARKS, 0); 802 SC_DEBUG(st->sc_periph, SCSIPI_DB3, ("st_space(-1) error=%d\n", error)); 803 } else { 804 SC_DEBUG(st->sc_periph, SCSIPI_DB3, ("no backspacing - flags = 0x%x, stxx=0x%x, st->flags=0x%x\n", flags, stxx, st->flags)); 805 } 806 } else { 807 SC_DEBUG(st->sc_periph, SCSIPI_DB3, ("error %d from st_check_eod\n", error)); 808 } 809 810 break; 811 case EJECT_MODE: 812 st_unmount(st, EJECT); 813 break; 814 } 815 816 KASSERTMSG((st->flags & ST_WRITTEN) == 0, 817 "pending ST_WRITTEN flag NOT cleared (flags=0x%x)", st->flags); 818 819 scsipi_wait_drain(periph); 820 821 scsipi_adapter_delref(adapt); 822 periph->periph_flags &= ~PERIPH_OPEN; 823 824 return error; 825 } 826 827 /* 828 * Start a new mount session. 829 * Copy in all the default parameters from the selected device mode. 830 * and try guess any that seem to be defaulted. 831 */ 832 static int 833 st_mount_tape(dev_t dev, int flags) 834 { 835 int unit; 836 u_int dsty; 837 struct st_softc *st; 838 struct scsipi_periph *periph; 839 int error = 0; 840 841 unit = STUNIT(dev); 842 dsty = STDSTY(dev); 843 st = device_lookup_private(&st_cd, unit); 844 periph = st->sc_periph; 845 846 if (st->flags & ST_MOUNTED) 847 return 0; 848 849 SC_DEBUG(periph, SCSIPI_DB1, ("mounting\n ")); 850 st->flags |= ST_NEW_MOUNT; 851 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 852 /* 853 * If the media is new, then make sure we give it a chance to 854 * to do a 'load' instruction. (We assume it is new.) 855 */ 856 if ((error = st_load(st, LD_LOAD, XS_CTL_SILENT)) != 0) 857 return error; 858 /* 859 * Throw another dummy instruction to catch 860 * 'Unit attention' errors. Many drives give 861 * these after doing a Load instruction (with 862 * the MEDIUM MAY HAVE CHANGED asc/ascq). 863 */ 864 scsipi_test_unit_ready(periph, XS_CTL_SILENT); /* XXX */ 865 866 /* 867 * Some devices can't tell you much until they have been 868 * asked to look at the media. This quirk does this. 869 */ 870 if (st->quirks & ST_Q_SENSE_HELP) 871 if ((error = st_touch_tape(st)) != 0) 872 return error; 873 /* 874 * Load the physical device parameters 875 * loads: blkmin, blkmax 876 */ 877 if ((error = st->ops(st, ST_OPS_RBL, 0)) != 0) 878 return error; 879 /* 880 * Load the media dependent parameters 881 * includes: media_blksize,media_density,numblks 882 * As we have a tape in, it should be reflected here. 883 * If not you may need the "quirk" above. 884 */ 885 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 886 return error; 887 /* 888 * If we have gained a permanent density from somewhere, 889 * then use it in preference to the one supplied by 890 * default by the driver. 891 */ 892 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 893 st->density = st->modes[dsty].density; 894 else 895 st->density = st->media_density; 896 /* 897 * If we have gained a permanent blocksize 898 * then use it in preference to the one supplied by 899 * default by the driver. 900 */ 901 st->flags &= ~ST_FIXEDBLOCKS; 902 if (st->modeflags[dsty] & 903 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 904 st->blksize = st->modes[dsty].blksize; 905 if (st->blksize) 906 st->flags |= ST_FIXEDBLOCKS; 907 } else { 908 if ((error = st_decide_mode(st, FALSE)) != 0) 909 return error; 910 } 911 if ((error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 912 /* ATAPI will return ENODEV for this, and this may be OK */ 913 if (error != ENODEV) { 914 aprint_error_dev(st->sc_dev, 915 "cannot set selected mode\n"); 916 return error; 917 } 918 } 919 st->flags &= ~ST_NEW_MOUNT; 920 st->flags |= ST_MOUNTED; 921 periph->periph_flags |= PERIPH_MEDIA_LOADED; /* move earlier? */ 922 st->blkno = st->fileno = (daddr_t) 0; 923 return 0; 924 } 925 926 /* 927 * End the present mount session. 928 * Rewind, and optionally eject the tape. 929 * Reset various flags to indicate that all new 930 * operations require another mount operation 931 */ 932 static void 933 st_unmount(struct st_softc *st, boolean eject) 934 { 935 struct scsipi_periph *periph = st->sc_periph; 936 int nmarks; 937 938 if ((st->flags & ST_MOUNTED) == 0) 939 return; 940 SC_DEBUG(periph, SCSIPI_DB1, ("unmounting\n")); 941 st_check_eod(st, FALSE, &nmarks, XS_CTL_IGNORE_NOT_READY); 942 st_rewind(st, 0, XS_CTL_IGNORE_NOT_READY); 943 944 /* 945 * Section 9.3.3 of the SCSI specs states that a device shall return 946 * the density value specified in the last successful MODE SELECT 947 * after an unload operation, in case it is not able to 948 * automatically determine the density of the new medium. 949 * 950 * So we instruct the device to use the default density, which will 951 * prevent the use of stale density values (in particular, 952 * in st_touch_tape(). 953 */ 954 st->density = 0; 955 if (st->ops(st, ST_OPS_MODESELECT, 0) != 0) { 956 aprint_error_dev(st->sc_dev, 957 "WARNING: cannot revert to default density\n"); 958 } 959 960 if (eject) { 961 if (!(st->quirks & ST_Q_NOPREVENT)) { 962 scsipi_prevent(periph, SPAMR_ALLOW, 963 XS_CTL_IGNORE_ILLEGAL_REQUEST | 964 XS_CTL_IGNORE_NOT_READY); 965 } 966 st_load(st, LD_UNLOAD, XS_CTL_IGNORE_NOT_READY); 967 st->blkno = st->fileno = (daddr_t) -1; 968 } else { 969 st->blkno = st->fileno = (daddr_t) 0; 970 } 971 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 972 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 973 } 974 975 /* 976 * Given all we know about the device, media, mode, 'quirks' and 977 * initial operation, make a decision as to how we should be set 978 * to run (regarding blocking and EOD marks) 979 */ 980 int 981 st_decide_mode(struct st_softc *st, boolean first_read) 982 { 983 984 SC_DEBUG(st->sc_periph, SCSIPI_DB2, ("starting block mode decision\n")); 985 986 /* 987 * If the drive can only handle fixed-length blocks and only at 988 * one size, perhaps we should just do that. 989 */ 990 if (st->blkmin && (st->blkmin == st->blkmax)) { 991 st->flags |= ST_FIXEDBLOCKS; 992 st->blksize = st->blkmin; 993 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 994 ("blkmin == blkmax of %d\n", st->blkmin)); 995 goto done; 996 } 997 /* 998 * If the tape density mandates (or even suggests) use of fixed 999 * or variable-length blocks, comply. 1000 */ 1001 switch (st->density) { 1002 case HALFINCH_800: 1003 case HALFINCH_1600: 1004 case HALFINCH_6250: 1005 case DDS: 1006 st->flags &= ~ST_FIXEDBLOCKS; 1007 st->blksize = 0; 1008 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1009 ("density specified variable\n")); 1010 goto done; 1011 case QIC_11: 1012 case QIC_24: 1013 case QIC_120: 1014 case QIC_150: 1015 case QIC_525: 1016 case QIC_1320: 1017 case QIC_3095: 1018 case QIC_3220: 1019 st->flags |= ST_FIXEDBLOCKS; 1020 if (st->media_blksize > 0) 1021 st->blksize = st->media_blksize; 1022 else 1023 st->blksize = DEF_FIXED_BSIZE; 1024 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1025 ("density specified fixed\n")); 1026 goto done; 1027 } 1028 /* 1029 * If we're about to read the tape, perhaps we should choose 1030 * fixed or variable-length blocks and block size according to 1031 * what the drive found on the tape. 1032 */ 1033 if (first_read && 1034 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 1035 (st->media_blksize == DEF_FIXED_BSIZE) || 1036 (st->media_blksize == 1024))) { 1037 if (st->media_blksize > 0) 1038 st->flags |= ST_FIXEDBLOCKS; 1039 else 1040 st->flags &= ~ST_FIXEDBLOCKS; 1041 st->blksize = st->media_blksize; 1042 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1043 ("Used media_blksize of %d\n", st->media_blksize)); 1044 goto done; 1045 } 1046 /* 1047 * We're getting no hints from any direction. Choose variable- 1048 * length blocks arbitrarily. 1049 */ 1050 st->flags &= ~ST_FIXEDBLOCKS; 1051 st->blksize = 0; 1052 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1053 ("Give up and default to variable mode\n")); 1054 1055 done: 1056 /* 1057 * Decide whether or not to write two file marks to signify end- 1058 * of-data. Make the decision as a function of density. If 1059 * the decision is not to use a second file mark, the SCSI BLANK 1060 * CHECK condition code will be recognized as end-of-data when 1061 * first read. 1062 * (I think this should be a by-product of fixed/variable..julian) 1063 */ 1064 switch (st->density) { 1065 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 1066 case QIC_11: 1067 case QIC_24: 1068 case QIC_120: 1069 case QIC_150: 1070 case QIC_525: 1071 case QIC_1320: 1072 case QIC_3095: 1073 case QIC_3220: 1074 st->flags &= ~ST_2FM_AT_EOD; 1075 break; 1076 default: 1077 st->flags |= ST_2FM_AT_EOD; 1078 } 1079 return 0; 1080 } 1081 1082 /* 1083 * Actually translate the requested transfer into 1084 * one the physical driver can understand 1085 * The transfer is described by a buf and will include 1086 * only one physical transfer. 1087 */ 1088 static void 1089 ststrategy(struct buf *bp) 1090 { 1091 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(bp->b_dev)); 1092 int s; 1093 1094 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1095 ("ststrategy %d bytes @ blk %" PRId64 "\n", bp->b_bcount, 1096 bp->b_blkno)); 1097 /* If it's a null transfer, return immediately */ 1098 if (bp->b_bcount == 0) 1099 goto abort; 1100 1101 /* If offset is negative, error */ 1102 if (bp->b_blkno < 0) { 1103 SC_DEBUG(periph, SCSIPI_DB3, 1104 ("EINVAL: ststrategy negative blockcount %" PRId64 "\n", bp->b_blkno)); 1105 bp->b_error = EINVAL; 1106 goto abort; 1107 } 1108 1109 /* Odd sized request on fixed drives are verboten */ 1110 if (st->flags & ST_FIXEDBLOCKS) { 1111 if (bp->b_bcount % st->blksize) { 1112 aprint_error_dev(st->sc_dev, "bad request, must be multiple of %d\n", 1113 st->blksize); 1114 bp->b_error = EIO; 1115 goto abort; 1116 } 1117 } 1118 /* as are out-of-range requests on variable drives. */ 1119 else if (bp->b_bcount < st->blkmin || 1120 (st->blkmax && bp->b_bcount > st->blkmax)) { 1121 aprint_error_dev(st->sc_dev, "bad request, must be between %d and %d\n", 1122 st->blkmin, st->blkmax); 1123 bp->b_error = EIO; 1124 goto abort; 1125 } 1126 s = splbio(); 1127 1128 /* 1129 * Place it in the queue of activities for this tape 1130 * at the end (a bit silly because we only have on user.. 1131 * (but it could fork())) 1132 */ 1133 bufq_put(st->buf_queue, bp); 1134 1135 /* 1136 * Tell the device to get going on the transfer if it's 1137 * not doing anything, otherwise just wait for completion 1138 * (All a bit silly if we're only allowing 1 open but..) 1139 */ 1140 ststart(st->sc_periph); 1141 1142 splx(s); 1143 return; 1144 abort: 1145 /* 1146 * Reset the residue because we didn't do anything, 1147 * and send the buffer back as done. 1148 */ 1149 bp->b_resid = bp->b_bcount; 1150 biodone(bp); 1151 return; 1152 } 1153 1154 /* 1155 * ststart looks to see if there is a buf waiting for the device 1156 * and that the device is not already busy. If both are true, 1157 * It dequeues the buf and creates a scsi command to perform the 1158 * transfer required. The transfer request will call scsipi_done 1159 * on completion, which will in turn call this routine again 1160 * so that the next queued transfer is performed. 1161 * The bufs are queued by the strategy routine (ststrategy) 1162 * 1163 * This routine is also called after other non-queued requests 1164 * have been made of the scsi driver, to ensure that the queue 1165 * continues to be drained. 1166 * ststart() is called at splbio 1167 */ 1168 static void 1169 ststart(struct scsipi_periph *periph) 1170 { 1171 struct st_softc *st = device_private(periph->periph_dev); 1172 struct buf *bp; 1173 struct scsi_rw_tape cmd; 1174 struct scsipi_xfer *xs; 1175 int flags, error __diagused; 1176 1177 SC_DEBUG(periph, SCSIPI_DB2, ("ststart ")); 1178 /* See if there is a buf to do and we are not already doing one */ 1179 while (periph->periph_active < periph->periph_openings) { 1180 /* if a special awaits, let it proceed first */ 1181 if (periph->periph_flags & PERIPH_WAITING) { 1182 periph->periph_flags &= ~PERIPH_WAITING; 1183 wakeup((void *)periph); 1184 return; 1185 } 1186 1187 /* 1188 * If the device has been unmounted by the user 1189 * then throw away all requests until done. 1190 */ 1191 if (__predict_false((st->flags & ST_MOUNTED) == 0 || 1192 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0)) { 1193 if ((bp = bufq_get(st->buf_queue)) != NULL) { 1194 /* make sure that one implies the other.. */ 1195 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 1196 bp->b_error = EIO; 1197 bp->b_resid = bp->b_bcount; 1198 biodone(bp); 1199 continue; 1200 } else 1201 return; 1202 } 1203 1204 if ((bp = bufq_peek(st->buf_queue)) == NULL) 1205 return; 1206 1207 iostat_busy(st->stats); 1208 1209 /* 1210 * only FIXEDBLOCK devices have pending I/O or space operations. 1211 */ 1212 if (st->flags & ST_FIXEDBLOCKS) { 1213 /* 1214 * If we are at a filemark but have not reported it yet 1215 * then we should report it now 1216 */ 1217 if (st->flags & ST_AT_FILEMARK) { 1218 if ((bp->b_flags & B_READ) == B_WRITE) { 1219 /* 1220 * Handling of ST_AT_FILEMARK in 1221 * st_space will fill in the right file 1222 * mark count. 1223 * Back up over filemark 1224 */ 1225 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1226 bufq_get(st->buf_queue); 1227 bp->b_error = EIO; 1228 bp->b_resid = bp->b_bcount; 1229 biodone(bp); 1230 continue; 1231 } 1232 } else { 1233 bufq_get(st->buf_queue); 1234 bp->b_resid = bp->b_bcount; 1235 bp->b_error = 0; 1236 st->flags &= ~ST_AT_FILEMARK; 1237 biodone(bp); 1238 continue; /* seek more work */ 1239 } 1240 } 1241 } 1242 /* 1243 * If we are at EOM but have not reported it 1244 * yet then we should report it now. 1245 */ 1246 if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { 1247 bufq_get(st->buf_queue); 1248 bp->b_resid = bp->b_bcount; 1249 if (st->flags & ST_EIO_PENDING) 1250 bp->b_error = EIO; 1251 st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); 1252 biodone(bp); 1253 continue; /* seek more work */ 1254 } 1255 1256 /* Fill out the scsi command */ 1257 memset(&cmd, 0, sizeof(cmd)); 1258 flags = XS_CTL_NOSLEEP | XS_CTL_ASYNC; 1259 if ((bp->b_flags & B_READ) == B_WRITE) { 1260 cmd.opcode = WRITE; 1261 st->flags &= ~ST_FM_WRITTEN; 1262 flags |= XS_CTL_DATA_OUT; 1263 } else { 1264 cmd.opcode = READ; 1265 flags |= XS_CTL_DATA_IN; 1266 } 1267 1268 /* 1269 * Handle "fixed-block-mode" tape drives by using the 1270 * block count instead of the length. 1271 */ 1272 if (st->flags & ST_FIXEDBLOCKS) { 1273 cmd.byte2 |= SRW_FIXED; 1274 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1275 } else 1276 _lto3b(bp->b_bcount, cmd.len); 1277 1278 /* Clear 'position updated' indicator */ 1279 st->flags &= ~ST_POSUPDATED; 1280 1281 /* go ask the adapter to do all this for us */ 1282 xs = scsipi_make_xs(periph, 1283 (struct scsipi_generic *)&cmd, sizeof(cmd), 1284 (u_char *)bp->b_data, bp->b_bcount, 1285 0, ST_IO_TIME, bp, flags); 1286 if (__predict_false(xs == NULL)) { 1287 /* 1288 * out of memory. Keep this buffer in the queue, and 1289 * retry later. 1290 */ 1291 callout_reset(&st->sc_callout, hz / 2, strestart, 1292 periph); 1293 return; 1294 } 1295 /* 1296 * need to dequeue the buffer before queuing the command, 1297 * because cdstart may be called recursively from the 1298 * HBA driver 1299 */ 1300 #ifdef DIAGNOSTIC 1301 if (bufq_get(st->buf_queue) != bp) 1302 panic("ststart(): dequeued wrong buf"); 1303 #else 1304 bufq_get(st->buf_queue); 1305 #endif 1306 error = scsipi_execute_xs(xs); 1307 /* with a scsipi_xfer preallocated, scsipi_command can't fail */ 1308 KASSERT(error == 0); 1309 } /* go back and see if we can cram more work in.. */ 1310 } 1311 1312 static void 1313 strestart(void *v) 1314 { 1315 int s = splbio(); 1316 ststart((struct scsipi_periph *)v); 1317 splx(s); 1318 } 1319 1320 static void 1321 stdone(struct scsipi_xfer *xs, int error) 1322 { 1323 struct st_softc *st = device_private(xs->xs_periph->periph_dev); 1324 struct buf *bp = xs->bp; 1325 1326 if (bp) { 1327 bp->b_error = error; 1328 bp->b_resid = xs->resid; 1329 /* 1330 * buggy device ? A SDLT320 can report an info 1331 * field of 0x3de8000 on a Media Error/Write Error 1332 * for this CBD: 0x0a 00 00 80 00 00 1333 */ 1334 if (bp->b_resid > bp->b_bcount || bp->b_resid < 0) 1335 bp->b_resid = bp->b_bcount; 1336 1337 if ((bp->b_flags & B_READ) == B_WRITE) 1338 st->flags |= ST_WRITTEN; 1339 else 1340 st->flags &= ~ST_WRITTEN; 1341 1342 iostat_unbusy(st->stats, bp->b_bcount, 1343 ((bp->b_flags & B_READ) == B_READ)); 1344 1345 rnd_add_uint32(&st->rnd_source, bp->b_blkno); 1346 1347 if ((st->flags & ST_POSUPDATED) == 0) { 1348 if (error) { 1349 st->fileno = st->blkno = -1; 1350 } else if (st->blkno != -1) { 1351 if (st->flags & ST_FIXEDBLOCKS) 1352 st->blkno += 1353 (bp->b_bcount / st->blksize); 1354 else 1355 st->blkno++; 1356 } 1357 } 1358 biodone(bp); 1359 } 1360 } 1361 1362 static int 1363 stread(dev_t dev, struct uio *uio, int iomode) 1364 { 1365 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(dev)); 1366 1367 int r = physio(ststrategy, NULL, dev, B_READ, 1368 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio); 1369 1370 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("[stread: result=%d]\n", r)); 1371 1372 return r; 1373 } 1374 1375 static int 1376 stwrite(dev_t dev, struct uio *uio, int iomode) 1377 { 1378 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(dev)); 1379 1380 int r = physio(ststrategy, NULL, dev, B_WRITE, 1381 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio); 1382 1383 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("[stwrite: result=%d]\n", r)); 1384 1385 return r; 1386 } 1387 1388 /* 1389 * Perform special action on behalf of the user; 1390 * knows about the internals of this device 1391 */ 1392 static int 1393 stioctl(dev_t dev, u_long cmd, void *arg, int flag, struct lwp *l) 1394 { 1395 int error = 0; 1396 int unit; 1397 int number, nmarks, dsty; 1398 int flags; 1399 struct st_softc *st; 1400 int hold_blksize; 1401 uint8_t hold_density; 1402 struct mtop *mt = (struct mtop *) arg; 1403 1404 /* Find the device that the user is talking about */ 1405 flags = 0; /* give error messages, act on errors etc. */ 1406 unit = STUNIT(dev); 1407 dsty = STDSTY(dev); 1408 st = device_lookup_private(&st_cd, unit); 1409 hold_blksize = st->blksize; 1410 hold_density = st->density; 1411 1412 switch ((u_int)cmd) { 1413 case MTIOCGET: { 1414 struct mtget *g = (struct mtget *) arg; 1415 /* 1416 * (to get the current state of READONLY) 1417 */ 1418 error = st->ops(st, ST_OPS_MODESENSE, XS_CTL_SILENT); 1419 if (error) { 1420 /* 1421 * Ignore the error if in control mode; 1422 * this is mandated by st(4). 1423 */ 1424 if (STMODE(dev) != CTRL_MODE) 1425 break; 1426 error = 0; 1427 } 1428 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("[ioctl: get status]\n")); 1429 memset(g, 0, sizeof(struct mtget)); 1430 g->mt_type = MT_ISAR; /* Ultrix compat *//*? */ 1431 g->mt_blksiz = st->blksize; 1432 g->mt_density = st->density; 1433 g->mt_mblksiz[0] = st->modes[0].blksize; 1434 g->mt_mblksiz[1] = st->modes[1].blksize; 1435 g->mt_mblksiz[2] = st->modes[2].blksize; 1436 g->mt_mblksiz[3] = st->modes[3].blksize; 1437 g->mt_mdensity[0] = st->modes[0].density; 1438 g->mt_mdensity[1] = st->modes[1].density; 1439 g->mt_mdensity[2] = st->modes[2].density; 1440 g->mt_mdensity[3] = st->modes[3].density; 1441 g->mt_fileno = st->fileno; 1442 g->mt_blkno = st->blkno; 1443 if (st->flags & ST_READONLY) 1444 g->mt_dsreg |= MT_DS_RDONLY; 1445 if (st->flags & ST_MOUNTED) 1446 g->mt_dsreg |= MT_DS_MOUNTED; 1447 g->mt_resid = st->mt_resid; 1448 g->mt_erreg = st->mt_erreg; 1449 /* 1450 * clear latched errors. 1451 */ 1452 st->mt_resid = 0; 1453 st->mt_erreg = 0; 1454 st->asc = 0; 1455 st->ascq = 0; 1456 break; 1457 } 1458 case MTIOCTOP: { 1459 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1460 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1461 mt->mt_count)); 1462 1463 /* compat: in U*x it is a short */ 1464 number = mt->mt_count; 1465 switch ((short) (mt->mt_op)) { 1466 case MTWEOF: /* write an end-of-file record */ 1467 error = st_write_filemarks(st, number, flags); 1468 break; 1469 case MTBSF: /* backward space file */ 1470 number = -number; 1471 case MTFSF: /* forward space file */ 1472 error = st_check_eod(st, FALSE, &nmarks, flags); 1473 if (!error) 1474 error = st_space(st, number - nmarks, 1475 SP_FILEMARKS, flags); 1476 break; 1477 case MTBSR: /* backward space record */ 1478 number = -number; 1479 case MTFSR: /* forward space record */ 1480 error = st_check_eod(st, true, &nmarks, flags); 1481 if (!error) 1482 error = st_space(st, number, SP_BLKS, flags); 1483 break; 1484 case MTREW: /* rewind */ 1485 error = st_rewind(st, 0, flags); 1486 break; 1487 case MTOFFL: /* rewind and put the drive offline */ 1488 st_unmount(st, EJECT); 1489 break; 1490 case MTNOP: /* no operation, sets status only */ 1491 break; 1492 case MTRETEN: /* retension the tape */ 1493 error = st_load(st, LD_RETENSION, flags); 1494 if (!error) 1495 error = st_load(st, LD_LOAD, flags); 1496 break; 1497 case MTEOM: /* forward space to end of media */ 1498 error = st_check_eod(st, FALSE, &nmarks, flags); 1499 if (!error) 1500 error = st_space(st, 1, SP_EOM, flags); 1501 break; 1502 case MTCACHE: /* enable controller cache */ 1503 st->flags &= ~ST_DONTBUFFER; 1504 goto try_new_value; 1505 case MTNOCACHE: /* disable controller cache */ 1506 st->flags |= ST_DONTBUFFER; 1507 goto try_new_value; 1508 case MTERASE: /* erase volume */ 1509 error = st_erase(st, number, flags); 1510 break; 1511 case MTSETBSIZ: /* Set block size for device */ 1512 #ifdef NOTYET 1513 if (!(st->flags & ST_NEW_MOUNT)) { 1514 uprintf("re-mount tape before changing " 1515 "blocksize"); 1516 error = EINVAL; 1517 break; 1518 } 1519 #endif 1520 if (number == 0) 1521 st->flags &= ~ST_FIXEDBLOCKS; 1522 else { 1523 if ((st->blkmin || st->blkmax) && 1524 (number < st->blkmin || 1525 number > st->blkmax)) { 1526 error = EINVAL; 1527 break; 1528 } 1529 st->flags |= ST_FIXEDBLOCKS; 1530 } 1531 st->blksize = number; 1532 st->flags |= ST_BLOCK_SET; /*XXX */ 1533 goto try_new_value; 1534 case MTSETDNSTY: /* Set density for device and mode */ 1535 /* 1536 * Any number >= 0 and <= 0xff is legal. Numbers 1537 * above 0x80 are 'vendor unique'. 1538 */ 1539 if (number < 0 || number > 255) { 1540 error = EINVAL; 1541 break; 1542 } else 1543 st->density = number; 1544 goto try_new_value; 1545 case MTCMPRESS: 1546 error = st->ops(st, (number == 0) ? 1547 ST_OPS_CMPRSS_OFF : ST_OPS_CMPRSS_ON, 1548 XS_CTL_SILENT); 1549 break; 1550 case MTEWARN: 1551 if (number) 1552 st->flags |= ST_EARLYWARN; 1553 else 1554 st->flags &= ~ST_EARLYWARN; 1555 break; 1556 1557 default: 1558 error = EINVAL; 1559 } 1560 break; 1561 } 1562 case MTIOCIEOT: 1563 case MTIOCEEOT: 1564 break; 1565 case MTIOCRDSPOS: 1566 error = st_rdpos(st, 0, (uint32_t *)arg); 1567 break; 1568 case MTIOCRDHPOS: 1569 error = st_rdpos(st, 1, (uint32_t *)arg); 1570 break; 1571 case MTIOCSLOCATE: 1572 error = st_setpos(st, 0, (uint32_t *)arg); 1573 break; 1574 case MTIOCHLOCATE: 1575 error = st_setpos(st, 1, (uint32_t *)arg); 1576 break; 1577 default: 1578 error = scsipi_do_ioctl(st->sc_periph, dev, cmd, arg, flag, l); 1579 break; 1580 } 1581 return error; 1582 1583 try_new_value: 1584 /* 1585 * Check that the mode being asked for is aggreeable to the 1586 * drive. If not, put it back the way it was. 1587 * 1588 * If in control mode, we can make (persistent) mode changes 1589 * even if no medium is loaded (see st(4)). 1590 */ 1591 if ((STMODE(dev) != CTRL_MODE || (st->flags & ST_MOUNTED) != 0) && 1592 (error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 1593 /* put it back as it was */ 1594 aprint_error_dev(st->sc_dev, "cannot set selected mode\n"); 1595 st->density = hold_density; 1596 st->blksize = hold_blksize; 1597 if (st->blksize) 1598 st->flags |= ST_FIXEDBLOCKS; 1599 else 1600 st->flags &= ~ST_FIXEDBLOCKS; 1601 return error; 1602 } 1603 /* 1604 * As the drive liked it, if we are setting a new default, 1605 * set it into the structures as such. 1606 * 1607 * The means for deciding this are not finalised yet- but 1608 * if the device was opened in Control Mode, the values 1609 * are persistent now across mounts. 1610 */ 1611 if (STMODE(dev) == CTRL_MODE) { 1612 switch ((short) (mt->mt_op)) { 1613 case MTSETBSIZ: 1614 st->modes[dsty].blksize = st->blksize; 1615 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1616 break; 1617 case MTSETDNSTY: 1618 st->modes[dsty].density = st->density; 1619 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1620 break; 1621 } 1622 } 1623 return 0; 1624 } 1625 1626 /* Do a synchronous read. */ 1627 static int 1628 st_read(struct st_softc *st, char *bf, int size, int flags) 1629 { 1630 struct scsi_rw_tape cmd; 1631 1632 /* If it's a null transfer, return immediatly */ 1633 if (size == 0) 1634 return 0; 1635 memset(&cmd, 0, sizeof(cmd)); 1636 cmd.opcode = READ; 1637 if (st->flags & ST_FIXEDBLOCKS) { 1638 cmd.byte2 |= SRW_FIXED; 1639 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1640 cmd.len); 1641 } else 1642 _lto3b(size, cmd.len); 1643 return scsipi_command(st->sc_periph, 1644 (void *)&cmd, sizeof(cmd), (void *)bf, size, 0, ST_IO_TIME, NULL, 1645 flags | XS_CTL_DATA_IN); 1646 } 1647 1648 /* issue an erase command */ 1649 static int 1650 st_erase(struct st_softc *st, int full, int flags) 1651 { 1652 int tmo; 1653 struct scsi_erase cmd; 1654 1655 /* 1656 * Full erase means set LONG bit in erase command, which asks 1657 * the drive to erase the entire unit. Without this bit, we're 1658 * asking the drive to write an erase gap. 1659 */ 1660 memset(&cmd, 0, sizeof(cmd)); 1661 cmd.opcode = ERASE; 1662 if (full) { 1663 cmd.byte2 = SE_LONG; 1664 tmo = ST_SPC_TIME; 1665 } else 1666 tmo = ST_IO_TIME; 1667 1668 /* 1669 * XXX We always do this asynchronously, for now, unless the device 1670 * has the ST_Q_ERASE_NOIMM quirk. How long should we wait if we 1671 * want to (eventually) to it synchronously? 1672 */ 1673 if ((st->quirks & ST_Q_ERASE_NOIMM) == 0) 1674 cmd.byte2 |= SE_IMMED; 1675 1676 return scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1677 ST_RETRIES, tmo, NULL, flags); 1678 } 1679 1680 /* skip N blocks/filemarks/seq filemarks/eom */ 1681 static int 1682 st_space(struct st_softc *st, int number, u_int what, int flags) 1683 { 1684 struct scsi_space cmd; 1685 int error; 1686 1687 switch (what) { 1688 case SP_BLKS: 1689 if (st->flags & ST_PER_ACTION) { 1690 if (number > 0) { 1691 st->flags &= ~ST_PER_ACTION; 1692 return EIO; 1693 } else if (number < 0) { 1694 if (st->flags & ST_AT_FILEMARK) { 1695 /* 1696 * Handling of ST_AT_FILEMARK 1697 * in st_space will fill in the 1698 * right file mark count. 1699 */ 1700 error = st_space(st, 0, SP_FILEMARKS, 1701 flags); 1702 if (error) 1703 return error; 1704 } 1705 if (st->flags & ST_BLANK_READ) { 1706 st->flags &= ~ST_BLANK_READ; 1707 return EIO; 1708 } 1709 st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); 1710 } 1711 } 1712 break; 1713 case SP_FILEMARKS: 1714 if (st->flags & ST_EIO_PENDING) { 1715 if (number > 0) { 1716 /* pretend we just discovered the error */ 1717 st->flags &= ~ST_EIO_PENDING; 1718 return EIO; 1719 } else if (number < 0) { 1720 /* back away from the error */ 1721 st->flags &= ~ST_EIO_PENDING; 1722 } 1723 } 1724 if (st->flags & ST_AT_FILEMARK) { 1725 st->flags &= ~ST_AT_FILEMARK; 1726 number--; 1727 } 1728 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 1729 /* back away from unwritten tape */ 1730 st->flags &= ~ST_BLANK_READ; 1731 number++; /* XXX dubious */ 1732 } 1733 break; 1734 case SP_EOM: 1735 if (st->flags & ST_EOM_PENDING) { 1736 /* we're already there */ 1737 st->flags &= ~ST_EOM_PENDING; 1738 return 0; 1739 } 1740 if (st->flags & ST_EIO_PENDING) { 1741 /* pretend we just discovered the error */ 1742 st->flags &= ~ST_EIO_PENDING; 1743 return EIO; 1744 } 1745 if (st->flags & ST_AT_FILEMARK) 1746 st->flags &= ~ST_AT_FILEMARK; 1747 break; 1748 } 1749 if (number == 0) 1750 return 0; 1751 1752 memset(&cmd, 0, sizeof(cmd)); 1753 cmd.opcode = SPACE; 1754 cmd.byte2 = what; 1755 _lto3b(number, cmd.number); 1756 1757 st->flags &= ~ST_POSUPDATED; 1758 st->last_ctl_resid = 0; 1759 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1760 0, ST_SPC_TIME, NULL, flags); 1761 1762 if (error == 0 && (st->flags & ST_POSUPDATED) == 0) { 1763 number = number - st->last_ctl_resid; 1764 if (what == SP_BLKS) { 1765 if (st->blkno != -1) 1766 st->blkno += number; 1767 } else if (what == SP_FILEMARKS) { 1768 if (st->fileno != -1) { 1769 st->fileno += number; 1770 if (number > 0) 1771 st->blkno = 0; 1772 else if (number < 0) 1773 st->blkno = -1; 1774 } 1775 } else if (what == SP_EOM) { 1776 /* This loses us relative position. */ 1777 st->fileno = st->blkno = -1; 1778 } 1779 } 1780 return error; 1781 } 1782 1783 /* 1784 * write N filemarks 1785 */ 1786 static int 1787 st_write_filemarks(struct st_softc *st, int number, int flags) 1788 { 1789 int error; 1790 struct scsi_write_filemarks cmd; 1791 1792 /* 1793 * It's hard to write a negative number of file marks. 1794 * Don't try. 1795 */ 1796 if (number < 0) { 1797 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1798 ("EINVAL: st_write_filemarks not writing %d file marks\n", number)); 1799 return EINVAL; 1800 } 1801 1802 switch (number) { 1803 case 0: /* really a command to sync the drive's buffers */ 1804 break; 1805 case 1: 1806 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 1807 st->flags &= ~ST_WRITTEN; 1808 else 1809 st->flags |= ST_FM_WRITTEN; 1810 st->flags &= ~ST_PER_ACTION; 1811 break; 1812 default: 1813 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 1814 } 1815 1816 memset(&cmd, 0, sizeof(cmd)); 1817 cmd.opcode = WRITE_FILEMARKS; 1818 if (SCSIPI_BUSTYPE_TYPE(scsipi_periph_bustype(st->sc_periph)) == 1819 SCSIPI_BUSTYPE_ATAPI) 1820 cmd.byte2 = SR_IMMED; 1821 /* 1822 * The ATAPI Onstream DI-30 doesn't support writing filemarks, but 1823 * WRITE_FILEMARKS is still used to flush the buffer 1824 */ 1825 if ((st->quirks & ST_Q_NOFILEMARKS) == 0) 1826 _lto3b(number, cmd.number); 1827 1828 /* XXX WE NEED TO BE ABLE TO GET A RESIDIUAL XXX */ 1829 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1830 0, ST_IO_TIME * 4, NULL, flags); 1831 if (error == 0 && st->fileno != -1) 1832 st->fileno += number; 1833 return error; 1834 } 1835 1836 /* 1837 * Make sure the right number of file marks is on tape if the 1838 * tape has been written. If the position argument is true, 1839 * leave the tape positioned where it was originally. 1840 * 1841 * nmarks returns the number of marks to skip (or, if position 1842 * true, which were skipped) to get back original position. 1843 */ 1844 static int 1845 st_check_eod(struct st_softc *st, boolean position, int *nmarks, int flags) 1846 { 1847 int error; 1848 1849 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 1850 default: 1851 *nmarks = 0; 1852 return 0; 1853 case ST_WRITTEN: 1854 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 1855 *nmarks = 1; 1856 break; 1857 case ST_WRITTEN | ST_2FM_AT_EOD: 1858 *nmarks = 2; 1859 } 1860 error = st_write_filemarks(st, *nmarks, flags); 1861 if (position && !error) 1862 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 1863 return error; 1864 } 1865 1866 /* load/unload/retension */ 1867 static int 1868 st_load(struct st_softc *st, u_int type, int flags) 1869 { 1870 int error; 1871 struct scsi_load cmd; 1872 1873 if (type != LD_LOAD) { 1874 int nmarks; 1875 1876 error = st_check_eod(st, FALSE, &nmarks, flags); 1877 if (error) { 1878 aprint_error_dev(st->sc_dev, 1879 "failed to write closing filemarks at " 1880 "unload, errno=%d\n", error); 1881 return error; 1882 } 1883 } 1884 if (st->quirks & ST_Q_IGNORE_LOADS) { 1885 if (type == LD_LOAD) 1886 /* 1887 * If we ignore loads, at least we should try a rewind. 1888 */ 1889 return st_rewind(st, 0, flags); 1890 /* otherwise, we should do what's asked of us */ 1891 } 1892 1893 memset(&cmd, 0, sizeof(cmd)); 1894 cmd.opcode = LOAD; 1895 if (SCSIPI_BUSTYPE_TYPE(scsipi_periph_bustype(st->sc_periph)) == 1896 SCSIPI_BUSTYPE_ATAPI) 1897 cmd.byte2 = SR_IMMED; 1898 cmd.how = type; 1899 1900 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1901 ST_RETRIES, ST_SPC_TIME, NULL, flags); 1902 if (error) { 1903 aprint_error_dev(st->sc_dev, "error %d in st_load (op %d)\n", 1904 error, type); 1905 } 1906 return error; 1907 } 1908 1909 /* Rewind the device */ 1910 static int 1911 st_rewind(struct st_softc *st, u_int immediate, int flags) 1912 { 1913 struct scsi_rewind cmd; 1914 int error; 1915 int nmarks; 1916 int timeout; 1917 1918 error = st_check_eod(st, FALSE, &nmarks, flags); 1919 if (error) { 1920 aprint_error_dev(st->sc_dev, 1921 "failed to write closing filemarks at " 1922 "rewind, errno=%d\n", error); 1923 return error; 1924 } 1925 st->flags &= ~ST_PER_ACTION; 1926 1927 /* If requestor asked for immediate response, set a short timeout */ 1928 timeout = immediate ? ST_CTL_TIME : ST_SPC_TIME; 1929 1930 /* ATAPI tapes always need immediate to be set */ 1931 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1932 immediate = SR_IMMED; 1933 1934 memset(&cmd, 0, sizeof(cmd)); 1935 cmd.opcode = REWIND; 1936 cmd.byte2 = immediate; 1937 1938 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1939 ST_RETRIES, timeout, NULL, flags); 1940 if (error) { 1941 aprint_error_dev(st->sc_dev, "error %d trying to rewind\n", 1942 error); 1943 /* lost position */ 1944 st->fileno = st->blkno = -1; 1945 } else 1946 st->fileno = st->blkno = 0; 1947 return error; 1948 } 1949 1950 static int 1951 st_rdpos(struct st_softc *st, int hard, uint32_t *blkptr) 1952 { 1953 int error; 1954 uint8_t posdata[20]; 1955 struct scsi_tape_read_position cmd; 1956 1957 /* 1958 * We try and flush any buffered writes here if we were writing 1959 * and we're trying to get hardware block position. It eats 1960 * up performance substantially, but I'm wary of drive firmware. 1961 * 1962 * I think that *logical* block position is probably okay- 1963 * but hardware block position might have to wait for data 1964 * to hit media to be valid. Caveat Emptor. 1965 */ 1966 1967 if (hard && (st->flags & ST_WRITTEN)) { 1968 /* First flush any pending writes... */ 1969 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 1970 /* 1971 * The latter case is for 'write protected' tapes 1972 * which are too stupid to recognize a zero count 1973 * for writing filemarks as a no-op. 1974 */ 1975 if (error != 0 && error != EACCES && error != EROFS) 1976 return error; 1977 } 1978 1979 memset(&cmd, 0, sizeof(cmd)); 1980 memset(&posdata, 0, sizeof(posdata)); 1981 cmd.opcode = READ_POSITION; 1982 if (hard) 1983 cmd.byte1 = 1; 1984 1985 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 1986 (void *)&posdata, sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, 1987 XS_CTL_SILENT | XS_CTL_DATA_IN); 1988 1989 if (error == 0) { 1990 #if 0 1991 printf("posdata:"); 1992 for (hard = 0; hard < sizeof(posdata); hard++) 1993 printf("%02x ", posdata[hard] & 0xff); 1994 printf("\n"); 1995 #endif 1996 if (posdata[0] & 0x4) { /* Block Position Unknown */ 1997 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1998 ("EINVAL: strdpos block position unknown\n")); 1999 error = EINVAL; 2000 } 2001 else 2002 *blkptr = _4btol(&posdata[4]); 2003 } 2004 return error; 2005 } 2006 2007 static int 2008 st_setpos(struct st_softc *st, int hard, uint32_t *blkptr) 2009 { 2010 int error; 2011 struct scsi_tape_locate cmd; 2012 2013 /* 2014 * We used to try and flush any buffered writes here. 2015 * Now we push this onto user applications to either 2016 * flush the pending writes themselves (via a zero count 2017 * WRITE FILEMARKS command) or they can trust their tape 2018 * drive to do this correctly for them. 2019 * 2020 * There are very ugly performance limitations otherwise. 2021 */ 2022 2023 memset(&cmd, 0, sizeof(cmd)); 2024 cmd.opcode = LOCATE; 2025 if (hard) 2026 cmd.byte2 = 1 << 2; 2027 _lto4b(*blkptr, cmd.blkaddr); 2028 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 2029 ST_RETRIES, ST_SPC_TIME, NULL, 0); 2030 /* 2031 * Note file && block number position now unknown (if 2032 * these things ever start being maintained in this driver) 2033 */ 2034 st->fileno = st->blkno = -1; 2035 return error; 2036 } 2037 2038 2039 /* 2040 * Look at the returned sense and act on the error and determine 2041 * the unix error number to pass back..., 0 (== report no error), 2042 * -1 = retry the operation, -2 continue error processing. 2043 */ 2044 static int 2045 st_interpret_sense(struct scsipi_xfer *xs) 2046 { 2047 struct scsipi_periph *periph = xs->xs_periph; 2048 struct scsi_sense_data *sense = &xs->sense.scsi_sense; 2049 struct buf *bp = xs->bp; 2050 struct st_softc *st = device_private(periph->periph_dev); 2051 int retval = EJUSTRETURN; 2052 int doprint = ((xs->xs_control & XS_CTL_SILENT) == 0); 2053 uint8_t key; 2054 int32_t info; 2055 2056 /* 2057 * If it isn't a extended or extended/deferred error, let 2058 * the generic code handle it. 2059 */ 2060 if (SSD_RCODE(sense->response_code) != SSD_RCODE_CURRENT && 2061 SSD_RCODE(sense->response_code) != SSD_RCODE_DEFERRED) 2062 return retval; 2063 2064 if (sense->response_code & SSD_RCODE_VALID) 2065 info = _4btol(sense->info); 2066 else 2067 info = (st->flags & ST_FIXEDBLOCKS) ? 2068 xs->datalen / st->blksize : xs->datalen; 2069 key = SSD_SENSE_KEY(sense->flags); 2070 st->mt_erreg = key; 2071 st->asc = sense->asc; 2072 st->ascq = sense->ascq; 2073 st->mt_resid = (short) info; 2074 2075 if (key == SKEY_NOT_READY && st->asc == 0x4 && st->ascq == 0x1) { 2076 /* Not Ready, Logical Unit Is in Process Of Becoming Ready */ 2077 if (!callout_pending(&periph->periph_callout)) 2078 scsipi_periph_freeze(periph, 1); 2079 callout_reset(&periph->periph_callout, 2080 hz, scsipi_periph_timed_thaw, periph); 2081 return ERESTART; 2082 } 2083 2084 /* If the device is not open yet, let generic handle */ 2085 if ((periph->periph_flags & PERIPH_OPEN) == 0) 2086 return retval; 2087 2088 xs->resid = info; 2089 if (st->flags & ST_FIXEDBLOCKS) { 2090 if (bp) { 2091 xs->resid *= st->blksize; 2092 st->last_io_resid = xs->resid; 2093 } else 2094 st->last_ctl_resid = xs->resid; 2095 if (key == SKEY_VOLUME_OVERFLOW) { 2096 st->flags |= ST_EIO_PENDING; 2097 if (bp) 2098 bp->b_resid = xs->resid; 2099 } else if (sense->flags & SSD_EOM) { 2100 if ((st->flags & ST_EARLYWARN) == 0) 2101 st->flags |= ST_EIO_PENDING; 2102 st->flags |= ST_EOM_PENDING; 2103 if (bp) { 2104 #if 0 2105 bp->b_resid = xs->resid; 2106 #else 2107 /* 2108 * Grotesque as it seems, the few times 2109 * I've actually seen a non-zero resid, 2110 * the tape drive actually lied and had 2111 * written all the data! 2112 */ 2113 bp->b_resid = 0; 2114 #endif 2115 } 2116 } 2117 if (sense->flags & SSD_FILEMARK) { 2118 st->flags |= ST_AT_FILEMARK; 2119 if (bp) 2120 bp->b_resid = xs->resid; 2121 if (st->fileno != (daddr_t) -1) { 2122 st->fileno++; 2123 st->blkno = 0; 2124 st->flags |= ST_POSUPDATED; 2125 } 2126 } 2127 if (sense->flags & SSD_ILI) { 2128 st->flags |= ST_EIO_PENDING; 2129 if (bp) 2130 bp->b_resid = xs->resid; 2131 if (sense->response_code & SSD_RCODE_VALID && 2132 (xs->xs_control & XS_CTL_SILENT) == 0) 2133 aprint_error_dev(st->sc_dev, 2134 "block wrong size, %d blocks residual\n", 2135 info); 2136 2137 /* 2138 * This quirk code helps the drive read 2139 * the first tape block, regardless of 2140 * format. That is required for these 2141 * drives to return proper MODE SENSE 2142 * information. 2143 */ 2144 if ((st->quirks & ST_Q_SENSE_HELP) && 2145 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 2146 st->blksize -= 512; 2147 else if ((st->flags & ST_POSUPDATED) == 0) { 2148 if (st->blkno != (daddr_t) -1) { 2149 st->blkno += 2150 (xs->datalen / st->blksize); 2151 st->flags |= ST_POSUPDATED; 2152 } 2153 } 2154 } 2155 /* 2156 * If data wanted and no data was transferred, do it immediately 2157 */ 2158 if (xs->datalen && xs->resid >= xs->datalen) { 2159 if (st->flags & ST_EIO_PENDING) 2160 return EIO; 2161 if (st->flags & ST_AT_FILEMARK) { 2162 if (bp) 2163 bp->b_resid = xs->resid; 2164 return 0; 2165 } 2166 } 2167 } else { /* must be variable mode */ 2168 if (bp) 2169 st->last_io_resid = xs->resid; 2170 else 2171 st->last_ctl_resid = xs->resid; 2172 if (sense->flags & SSD_EOM) { 2173 /* 2174 * The current semantics of this 2175 * driver requires EOM detection 2176 * to return EIO unless early 2177 * warning detection is enabled 2178 * for variable mode (this is always 2179 * on for fixed block mode). 2180 */ 2181 if (st->flags & ST_EARLYWARN) { 2182 st->flags |= ST_EOM_PENDING; 2183 retval = 0; 2184 } else { 2185 retval = EIO; 2186 /* 2187 * If we return an error we can't claim to 2188 * have transfered all data. 2189 */ 2190 if (xs->resid == 0) 2191 xs->resid = xs->datalen; 2192 } 2193 2194 /* 2195 * If it's an unadorned EOM detection, 2196 * suppress printing an error. 2197 */ 2198 if (key == SKEY_NO_SENSE) { 2199 doprint = 0; 2200 } 2201 } else if (sense->flags & SSD_FILEMARK) { 2202 retval = 0; 2203 if (st->fileno != (daddr_t) -1) { 2204 st->fileno++; 2205 st->blkno = 0; 2206 st->flags |= ST_POSUPDATED; 2207 } 2208 } else if (sense->flags & SSD_ILI) { 2209 if (info < 0) { 2210 /* 2211 * The tape record was bigger than the read 2212 * we issued. 2213 */ 2214 if ((xs->xs_control & XS_CTL_SILENT) == 0) { 2215 aprint_error_dev(st->sc_dev, 2216 "%d-byte tape record too big" 2217 " for %d-byte user buffer\n", 2218 xs->datalen - info, xs->datalen); 2219 } 2220 retval = EIO; 2221 } else { 2222 retval = 0; 2223 if (st->blkno != (daddr_t) -1) { 2224 st->blkno++; 2225 st->flags |= ST_POSUPDATED; 2226 } 2227 } 2228 } 2229 if (bp) 2230 bp->b_resid = xs->resid; 2231 } 2232 2233 #ifndef SCSIPI_DEBUG 2234 if (retval == 0 && key == SKEY_NO_SENSE) 2235 doprint = 0; 2236 #endif 2237 if (key == SKEY_BLANK_CHECK) { 2238 /* 2239 * This quirk code helps the drive read the 2240 * first tape block, regardless of format. That 2241 * is required for these drives to return proper 2242 * MODE SENSE information. 2243 */ 2244 if ((st->quirks & ST_Q_SENSE_HELP) && 2245 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 2246 /* still starting */ 2247 st->blksize -= 512; 2248 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 2249 st->flags |= ST_BLANK_READ; 2250 xs->resid = xs->datalen; 2251 if (bp) { 2252 bp->b_resid = xs->resid; 2253 /* return an EOF */ 2254 } 2255 retval = 0; 2256 /* lost position */ 2257 st->fileno = st->blkno = -1; 2258 } 2259 } 2260 2261 /* 2262 * If generic sense processing will continue, we should not 2263 * print sense info here. 2264 */ 2265 if (retval == EJUSTRETURN) 2266 doprint = 0; 2267 2268 if (doprint) { 2269 /* Print verbose sense info if possible */ 2270 if (scsipi_print_sense(xs, 0) != 0) 2271 return retval; 2272 2273 /* Print less-verbose sense info */ 2274 scsipi_printaddr(periph); 2275 printf("Sense Key 0x%02x", key); 2276 if ((sense->response_code & SSD_RCODE_VALID) != 0) { 2277 switch (key) { 2278 case SKEY_NOT_READY: 2279 case SKEY_ILLEGAL_REQUEST: 2280 case SKEY_UNIT_ATTENTION: 2281 case SKEY_DATA_PROTECT: 2282 break; 2283 case SKEY_VOLUME_OVERFLOW: 2284 case SKEY_BLANK_CHECK: 2285 printf(", requested size: %d (decimal)", info); 2286 break; 2287 case SKEY_ABORTED_COMMAND: 2288 if (xs->xs_retries) 2289 printf(", retrying"); 2290 printf(", cmd 0x%x, info 0x%x", 2291 xs->cmd->opcode, info); 2292 break; 2293 default: 2294 printf(", info = %d (decimal)", info); 2295 } 2296 } 2297 if (sense->extra_len != 0) { 2298 int n; 2299 printf(", data ="); 2300 for (n = 0; n < sense->extra_len; n++) 2301 printf(" %02x", sense->csi[n]); 2302 } 2303 printf("\n"); 2304 } 2305 return retval; 2306 } 2307 2308 /* 2309 * The quirk here is that the drive returns some value to st_mode_sense 2310 * incorrectly until the tape has actually passed by the head. 2311 * 2312 * The method is to set the drive to large fixed-block state (user-specified 2313 * density and 1024-byte blocks), then read and rewind to get it to sense the 2314 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 2315 * work, as a last resort, try variable- length blocks. The result will be 2316 * the ability to do an accurate st_mode_sense. 2317 * 2318 * We know we can do a rewind because we just did a load, which implies rewind. 2319 * Rewind seems preferable to space backward if we have a virgin tape. 2320 * 2321 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 2322 * error processing, both part of st_interpret_sense. 2323 */ 2324 static int 2325 st_touch_tape(struct st_softc *st) 2326 { 2327 char *bf; 2328 int readsize; 2329 int error; 2330 2331 bf = malloc(1024, M_TEMP, M_NOWAIT); 2332 if (bf == NULL) 2333 return ENOMEM; 2334 2335 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 2336 goto bad; 2337 2338 /* 2339 * If the block size is already known from the 2340 * sense data, use it. Else start probing at 1024. 2341 */ 2342 if (st->media_blksize > 0) 2343 st->blksize = st->media_blksize; 2344 else 2345 st->blksize = 1024; 2346 2347 do { 2348 switch (st->blksize) { 2349 case 512: 2350 case 1024: 2351 readsize = st->blksize; 2352 st->flags |= ST_FIXEDBLOCKS; 2353 break; 2354 default: 2355 readsize = 1; 2356 st->flags &= ~ST_FIXEDBLOCKS; 2357 } 2358 if ((error = st->ops(st, ST_OPS_MODESELECT, XS_CTL_SILENT)) 2359 != 0) { 2360 /* 2361 * The device did not agree with the proposed 2362 * block size. If we exhausted our options, 2363 * return failure, else try another. 2364 */ 2365 if (readsize == 1) 2366 goto bad; 2367 st->blksize -= 512; 2368 continue; 2369 } 2370 st_read(st, bf, readsize, XS_CTL_SILENT); /* XXX */ 2371 if ((error = st_rewind(st, 0, 0)) != 0) { 2372 bad: free(bf, M_TEMP); 2373 return error; 2374 } 2375 } while (readsize != 1 && readsize > st->blksize); 2376 2377 free(bf, M_TEMP); 2378 return 0; 2379 } 2380 2381 static int 2382 stdump(dev_t dev, daddr_t blkno, void *va, size_t size) 2383 { 2384 /* Not implemented. */ 2385 return ENXIO; 2386 } 2387 2388 /* 2389 * Send a filled out parameter structure to the drive to 2390 * set it into the desire modes etc. 2391 */ 2392 int 2393 st_mode_select(struct st_softc *st, int flags) 2394 { 2395 u_int select_len; 2396 struct select { 2397 struct scsi_mode_parameter_header_6 header; 2398 struct scsi_general_block_descriptor blk_desc; 2399 u_char sense_data[MAX_PAGE_0_SIZE]; 2400 } select; 2401 struct scsipi_periph *periph = st->sc_periph; 2402 2403 select_len = sizeof(select.header) + sizeof(select.blk_desc) + 2404 st->page_0_size; 2405 2406 /* 2407 * This quirk deals with drives that have only one valid mode 2408 * and think this gives them license to reject all mode selects, 2409 * even if the selected mode is the one that is supported. 2410 */ 2411 if (st->quirks & ST_Q_UNIMODAL) { 2412 SC_DEBUG(periph, SCSIPI_DB3, 2413 ("not setting density 0x%x blksize 0x%x\n", 2414 st->density, st->blksize)); 2415 return 0; 2416 } 2417 2418 /* Set up for a mode select */ 2419 memset(&select, 0, sizeof(select)); 2420 select.header.blk_desc_len = sizeof(struct 2421 scsi_general_block_descriptor); 2422 select.header.dev_spec &= ~SMH_DSP_BUFF_MODE; 2423 select.blk_desc.density = st->density; 2424 if (st->flags & ST_DONTBUFFER) 2425 select.header.dev_spec |= SMH_DSP_BUFF_MODE_OFF; 2426 else 2427 select.header.dev_spec |= SMH_DSP_BUFF_MODE_ON; 2428 if (st->flags & ST_FIXEDBLOCKS) 2429 _lto3b(st->blksize, select.blk_desc.blklen); 2430 if (st->page_0_size) 2431 memcpy(select.sense_data, st->sense_data, st->page_0_size); 2432 2433 /* do the command */ 2434 return scsipi_mode_select(periph, 0, &select.header, select_len, 2435 flags, ST_RETRIES, ST_CTL_TIME); 2436 } 2437
Indexes created Fri Sep 26 20:09:58 GMT 2025