st.c revision 1.226.4.4
1 /* $NetBSD: st.c,v 1.226.4.4 2017/08/28 17:52:27 skrll 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 1.226.4.4 2017/08/28 17:52:27 skrll Exp $"); 54 55 #ifdef _KERNEL_OPT 56 #include "opt_scsi.h" 57 #endif 58 59 #include <sys/param.h> 60 #include <sys/systm.h> 61 #include <sys/fcntl.h> 62 #include <sys/errno.h> 63 #include <sys/ioctl.h> 64 #include <sys/malloc.h> 65 #include <sys/buf.h> 66 #include <sys/bufq.h> 67 #include <sys/proc.h> 68 #include <sys/mtio.h> 69 #include <sys/device.h> 70 #include <sys/conf.h> 71 #include <sys/kernel.h> 72 #include <sys/vnode.h> 73 #include <sys/iostat.h> 74 #include <sys/sysctl.h> 75 76 #include <dev/scsipi/scsi_spc.h> 77 #include <dev/scsipi/scsipi_all.h> 78 #include <dev/scsipi/scsi_all.h> 79 #include <dev/scsipi/scsi_tape.h> 80 #include <dev/scsipi/scsipiconf.h> 81 #include <dev/scsipi/scsipi_base.h> 82 #include <dev/scsipi/stvar.h> 83 84 /* Defines for device specific stuff */ 85 #define DEF_FIXED_BSIZE 512 86 87 #define STMODE(z) ( minor(z) & 0x03) 88 #define STDSTY(z) ((minor(z) >> 2) & 0x03) 89 #define STUNIT(z) ((minor(z) >> 4) ) 90 #define STNMINOR 16 91 92 #define NORMAL_MODE 0 93 #define NOREW_MODE 1 94 #define EJECT_MODE 2 95 #define CTRL_MODE 3 96 97 #ifndef ST_MOUNT_DELAY 98 #define ST_MOUNT_DELAY 0 99 #endif 100 101 static dev_type_open(stopen); 102 static dev_type_close(stclose); 103 static dev_type_read(stread); 104 static dev_type_write(stwrite); 105 static dev_type_ioctl(stioctl); 106 static dev_type_strategy(ststrategy); 107 static dev_type_dump(stdump); 108 109 const struct bdevsw st_bdevsw = { 110 .d_open = stopen, 111 .d_close = stclose, 112 .d_strategy = ststrategy, 113 .d_ioctl = stioctl, 114 .d_dump = stdump, 115 .d_psize = nosize, 116 .d_discard = nodiscard, 117 .d_flag = D_TAPE | D_MPSAFE 118 }; 119 120 const struct cdevsw st_cdevsw = { 121 .d_open = stopen, 122 .d_close = stclose, 123 .d_read = stread, 124 .d_write = stwrite, 125 .d_ioctl = stioctl, 126 .d_stop = nostop, 127 .d_tty = notty, 128 .d_poll = nopoll, 129 .d_mmap = nommap, 130 .d_kqfilter = nokqfilter, 131 .d_discard = nodiscard, 132 .d_flag = D_TAPE | D_MPSAFE 133 }; 134 135 /* 136 * Define various devices that we know mis-behave in some way, 137 * and note how they are bad, so we can correct for them 138 */ 139 140 static const struct st_quirk_inquiry_pattern st_quirk_patterns[] = { 141 {{T_SEQUENTIAL, T_REMOV, 142 " ", " ", " "}, {0, 0, { 143 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 144 {ST_Q_FORCE_BLKSIZE, 512, QIC_24}, /* minor 4-7 */ 145 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_1600}, /* minor 8-11 */ 146 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_6250} /* minor 12-15 */ 147 }}}, 148 {{T_SEQUENTIAL, T_REMOV, 149 "TANDBERG", " TDC 3600 ", ""}, {0, 12, { 150 {0, 0, 0}, /* minor 0-3 */ 151 {ST_Q_FORCE_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 152 {0, 0, QIC_150}, /* minor 8-11 */ 153 {0, 0, QIC_120} /* minor 12-15 */ 154 }}}, 155 {{T_SEQUENTIAL, T_REMOV, 156 "TANDBERG", " TDC 3800 ", ""}, {0, 0, { 157 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 158 {0, 0, QIC_525}, /* minor 4-7 */ 159 {0, 0, QIC_150}, /* minor 8-11 */ 160 {0, 0, QIC_120} /* minor 12-15 */ 161 }}}, 162 {{T_SEQUENTIAL, T_REMOV, 163 "TANDBERG", " SLR5 4/8GB ", ""}, {0, 0, { 164 {ST_Q_FORCE_BLKSIZE, 1024, 0}, /* minor 0-3 */ 165 {0, 0, 0}, /* minor 4-7 */ 166 {0, 0, 0}, /* minor 8-11 */ 167 {0, 0, 0} /* minor 12-15 */ 168 }}}, 169 /* 170 * lacking a manual for the 4200, it's not clear what the 171 * specific density codes should be- the device is a 2.5GB 172 * capable QIC drive, those density codes aren't readily 173 * availabel. The 'default' will just have to do. 174 */ 175 {{T_SEQUENTIAL, T_REMOV, 176 "TANDBERG", " TDC 4200 ", ""}, {0, 0, { 177 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 178 {0, 0, QIC_525}, /* minor 4-7 */ 179 {0, 0, QIC_150}, /* minor 8-11 */ 180 {0, 0, QIC_120} /* minor 12-15 */ 181 }}}, 182 /* 183 * At least -005 and -007 need this. I'll assume they all do unless I 184 * hear otherwise. - mycroft, 31MAR1994 185 */ 186 {{T_SEQUENTIAL, T_REMOV, 187 "ARCHIVE ", "VIPER 2525 25462", ""}, {0, 0, { 188 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 189 {ST_Q_SENSE_HELP, 0, QIC_525}, /* minor 4-7 */ 190 {0, 0, QIC_150}, /* minor 8-11 */ 191 {0, 0, QIC_120} /* minor 12-15 */ 192 }}}, 193 /* 194 * One user reports that this works for his tape drive. It probably 195 * needs more work. - mycroft, 09APR1994 196 */ 197 {{T_SEQUENTIAL, T_REMOV, 198 "SANKYO ", "CP525 ", ""}, {0, 0, { 199 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 200 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 201 {0, 0, QIC_150}, /* minor 8-11 */ 202 {0, 0, QIC_120} /* minor 12-15 */ 203 }}}, 204 {{T_SEQUENTIAL, T_REMOV, 205 "ANRITSU ", "DMT780 ", ""}, {0, 0, { 206 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 207 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 208 {0, 0, QIC_150}, /* minor 8-11 */ 209 {0, 0, QIC_120} /* minor 12-15 */ 210 }}}, 211 {{T_SEQUENTIAL, T_REMOV, 212 "ARCHIVE ", "VIPER 150 21247", ""}, {ST_Q_ERASE_NOIMM, 12, { 213 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 214 {0, 0, QIC_150}, /* minor 4-7 */ 215 {0, 0, QIC_120}, /* minor 8-11 */ 216 {0, 0, QIC_24} /* minor 12-15 */ 217 }}}, 218 {{T_SEQUENTIAL, T_REMOV, 219 "ARCHIVE ", "VIPER 150 21531", ""}, {ST_Q_ERASE_NOIMM, 12, { 220 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 221 {0, 0, QIC_150}, /* minor 4-7 */ 222 {0, 0, QIC_120}, /* minor 8-11 */ 223 {0, 0, QIC_24} /* minor 12-15 */ 224 }}}, 225 {{T_SEQUENTIAL, T_REMOV, 226 "WANGTEK ", "5099ES SCSI", ""}, {0, 0, { 227 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 228 {0, 0, QIC_11}, /* minor 4-7 */ 229 {0, 0, QIC_24}, /* minor 8-11 */ 230 {0, 0, QIC_24} /* minor 12-15 */ 231 }}}, 232 {{T_SEQUENTIAL, T_REMOV, 233 "WANGTEK ", "5150ES SCSI", ""}, {0, 0, { 234 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 235 {0, 0, QIC_24}, /* minor 4-7 */ 236 {0, 0, QIC_120}, /* minor 8-11 */ 237 {0, 0, QIC_150} /* minor 12-15 */ 238 }}}, 239 {{T_SEQUENTIAL, T_REMOV, 240 "WANGTEK ", "5525ES SCSI REV7", ""}, {0, 0, { 241 {0, 0, 0}, /* minor 0-3 */ 242 {ST_Q_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 243 {0, 0, QIC_150}, /* minor 8-11 */ 244 {0, 0, QIC_120} /* minor 12-15 */ 245 }}}, 246 {{T_SEQUENTIAL, T_REMOV, 247 "WangDAT ", "Model 1300 ", ""}, {0, 0, { 248 {0, 0, 0}, /* minor 0-3 */ 249 {ST_Q_FORCE_BLKSIZE, 512, DDS}, /* minor 4-7 */ 250 {ST_Q_FORCE_BLKSIZE, 1024, DDS}, /* minor 8-11 */ 251 {ST_Q_FORCE_BLKSIZE, 0, DDS} /* minor 12-15 */ 252 }}}, 253 {{T_SEQUENTIAL, T_REMOV, 254 "EXABYTE ", "EXB-8200 ", "263H"}, {0, 5, { 255 {0, 0, 0}, /* minor 0-3 */ 256 {0, 0, 0}, /* minor 4-7 */ 257 {0, 0, 0}, /* minor 8-11 */ 258 {0, 0, 0} /* minor 12-15 */ 259 }}}, 260 {{T_SEQUENTIAL, T_REMOV, 261 "STK", "9490", ""}, 262 {ST_Q_FORCE_BLKSIZE, 0, { 263 {0, 0, 0}, /* minor 0-3 */ 264 {0, 0, 0}, /* minor 4-7 */ 265 {0, 0, 0}, /* minor 8-11 */ 266 {0, 0, 0} /* minor 12-15 */ 267 }}}, 268 {{T_SEQUENTIAL, T_REMOV, 269 "STK", "SD-3", ""}, 270 {ST_Q_FORCE_BLKSIZE, 0, { 271 {0, 0, 0}, /* minor 0-3 */ 272 {0, 0, 0}, /* minor 4-7 */ 273 {0, 0, 0}, /* minor 8-11 */ 274 {0, 0, 0} /* minor 12-15 */ 275 }}}, 276 {{T_SEQUENTIAL, T_REMOV, 277 "IBM", "03590", ""}, {ST_Q_IGNORE_LOADS, 0, { 278 {0, 0, 0}, /* minor 0-3 */ 279 {0, 0, 0}, /* minor 4-7 */ 280 {0, 0, 0}, /* minor 8-11 */ 281 {0, 0, 0} /* minor 12-15 */ 282 }}}, 283 {{T_SEQUENTIAL, T_REMOV, 284 "HP ", "T4000s ", ""}, {ST_Q_UNIMODAL, 0, { 285 {0, 0, QIC_3095}, /* minor 0-3 */ 286 {0, 0, QIC_3095}, /* minor 4-7 */ 287 {0, 0, QIC_3095}, /* minor 8-11 */ 288 {0, 0, QIC_3095}, /* minor 12-15 */ 289 }}}, 290 #if 0 291 {{T_SEQUENTIAL, T_REMOV, 292 "EXABYTE ", "EXB-8200 ", ""}, {0, 12, { 293 {0, 0, 0}, /* minor 0-3 */ 294 {0, 0, 0}, /* minor 4-7 */ 295 {0, 0, 0}, /* minor 8-11 */ 296 {0, 0, 0} /* minor 12-15 */ 297 }}}, 298 #endif 299 {{T_SEQUENTIAL, T_REMOV, 300 "TEAC ", "MT-2ST/N50 ", ""}, {ST_Q_IGNORE_LOADS, 0, { 301 {0, 0, 0}, /* minor 0-3 */ 302 {0, 0, 0}, /* minor 4-7 */ 303 {0, 0, 0}, /* minor 8-11 */ 304 {0, 0, 0} /* minor 12-15 */ 305 }}}, 306 {{T_SEQUENTIAL, T_REMOV, 307 "OnStream", "ADR50 Drive", ""}, {ST_Q_UNIMODAL, 0, { 308 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 309 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 4-7 */ 310 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 8-11 */ 311 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 12-15 */ 312 }}}, 313 {{T_SEQUENTIAL, T_REMOV, 314 "OnStream DI-30", "", "1.0"}, {ST_Q_NOFILEMARKS, 0, { 315 {0, 0, 0}, /* minor 0-3 */ 316 {0, 0, 0}, /* minor 4-7 */ 317 {0, 0, 0}, /* minor 8-11 */ 318 {0, 0, 0} /* minor 12-15 */ 319 }}}, 320 {{T_SEQUENTIAL, T_REMOV, 321 "NCR H621", "0-STD-03-46F880 ", ""}, {ST_Q_NOPREVENT, 0, { 322 {0, 0, 0}, /* minor 0-3 */ 323 {0, 0, 0}, /* minor 4-7 */ 324 {0, 0, 0}, /* minor 8-11 */ 325 {0, 0, 0} /* minor 12-15 */ 326 }}}, 327 {{T_SEQUENTIAL, T_REMOV, 328 "Seagate STT3401A", "hp0atxa", ""}, {0, 0, { 329 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 330 {ST_Q_FORCE_BLKSIZE, 1024, 0}, /* minor 4-7 */ 331 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 8-11 */ 332 {ST_Q_FORCE_BLKSIZE, 512, 0} /* minor 12-15 */ 333 }}}, 334 }; 335 336 #define NOEJECT 0 337 #define EJECT 1 338 339 static void st_identify_drive(struct st_softc *, 340 struct scsipi_inquiry_pattern *); 341 static void st_loadquirks(struct st_softc *); 342 static int st_mount_tape(dev_t, int); 343 static void st_unmount(struct st_softc *, boolean); 344 static int st_decide_mode(struct st_softc *, boolean); 345 static void ststart(struct scsipi_periph *); 346 static void strestart(void *); 347 static void stdone(struct scsipi_xfer *, int); 348 static int st_read(struct st_softc *, char *, int, int); 349 static int st_space(struct st_softc *, int, u_int, int); 350 static int st_write_filemarks(struct st_softc *, int, int); 351 static int st_check_eod(struct st_softc *, boolean, int *, int); 352 static int st_load(struct st_softc *, u_int, int); 353 static int st_rewind(struct st_softc *, u_int, int); 354 static int st_interpret_sense(struct scsipi_xfer *); 355 static int st_touch_tape(struct st_softc *); 356 static int st_erase(struct st_softc *, int full, int flags); 357 static int st_rdpos(struct st_softc *, int, uint32_t *); 358 static int st_setpos(struct st_softc *, int, uint32_t *); 359 360 static const struct scsipi_periphsw st_switch = { 361 st_interpret_sense, 362 ststart, 363 NULL, 364 stdone 365 }; 366 367 #if defined(ST_ENABLE_EARLYWARN) 368 #define ST_INIT_FLAGS ST_EARLYWARN 369 #else 370 #define ST_INIT_FLAGS 0 371 #endif 372 373 /* 374 * The routine called by the low level scsi routine when it discovers 375 * A device suitable for this driver 376 */ 377 void 378 stattach(device_t parent, device_t self, void *aux) 379 { 380 struct st_softc *st = device_private(self); 381 struct scsipibus_attach_args *sa = aux; 382 struct scsipi_periph *periph = sa->sa_periph; 383 384 SC_DEBUG(periph, SCSIPI_DB2, ("stattach: ")); 385 st->sc_dev = self; 386 387 /* Store information needed to contact our base driver */ 388 st->sc_periph = periph; 389 periph->periph_dev = st->sc_dev; 390 periph->periph_switch = &st_switch; 391 392 /* Set initial flags */ 393 st->flags = ST_INIT_FLAGS; 394 395 /* Set up the buf queue for this device */ 396 bufq_alloc(&st->buf_queue, "fcfs", 0); 397 callout_init(&st->sc_callout, 0); 398 399 /* 400 * Check if the drive is a known criminal and take 401 * Any steps needed to bring it into line 402 */ 403 st_identify_drive(st, &sa->sa_inqbuf); 404 aprint_naive("\n"); 405 aprint_normal("\n"); 406 /* Use the subdriver to request information regarding the drive. */ 407 aprint_normal_dev(self, "%s", st->quirkdata ? "quirks apply, " : ""); 408 if (scsipi_test_unit_ready(periph, 409 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE) || 410 st->ops(st, ST_OPS_MODESENSE, 411 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE)) 412 aprint_normal("drive empty\n"); 413 else { 414 aprint_normal("density code %d, ", st->media_density); 415 if (st->media_blksize > 0) 416 aprint_normal("%d-byte", st->media_blksize); 417 else 418 aprint_normal("variable"); 419 aprint_normal(" blocks, write-%s\n", 420 (st->flags & ST_READONLY) ? "protected" : "enabled"); 421 } 422 423 st->stats = iostat_alloc(IOSTAT_TAPE, parent, 424 device_xname(st->sc_dev)); 425 426 rnd_attach_source(&st->rnd_source, device_xname(st->sc_dev), 427 RND_TYPE_TAPE, RND_FLAG_DEFAULT); 428 } 429 430 int 431 stdetach(device_t self, int flags) 432 { 433 struct st_softc *st = device_private(self); 434 struct scsipi_periph *periph = st->sc_periph; 435 struct scsipi_channel *chan = periph->periph_channel; 436 int bmaj, cmaj, mn; 437 438 /* locate the major number */ 439 bmaj = bdevsw_lookup_major(&st_bdevsw); 440 cmaj = cdevsw_lookup_major(&st_cdevsw); 441 442 /* kill any pending restart */ 443 callout_halt(&st->sc_callout, NULL); 444 445 mutex_enter(chan_mtx(chan)); 446 447 /* Kill off any queued buffers. */ 448 bufq_drain(st->buf_queue); 449 450 /* Kill off any pending commands. */ 451 scsipi_kill_pending(st->sc_periph); 452 453 mutex_exit(chan_mtx(chan)); 454 455 bufq_free(st->buf_queue); 456 457 /* Nuke the vnodes for any open instances */ 458 mn = STUNIT(device_unit(self)); 459 vdevgone(bmaj, mn, mn+STNMINOR-1, VBLK); 460 vdevgone(cmaj, mn, mn+STNMINOR-1, VCHR); 461 462 iostat_free(st->stats); 463 464 /* Unhook the entropy source. */ 465 rnd_detach_source(&st->rnd_source); 466 467 return 0; 468 } 469 470 /* 471 * Use the inquiry routine in 'scsi_base' to get drive info so we can 472 * Further tailor our behaviour. 473 */ 474 static void 475 st_identify_drive(struct st_softc *st, struct scsipi_inquiry_pattern *inqbuf) 476 { 477 const struct st_quirk_inquiry_pattern *finger; 478 int priority; 479 480 finger = scsipi_inqmatch(inqbuf, 481 st_quirk_patterns, 482 sizeof(st_quirk_patterns) / sizeof(st_quirk_patterns[0]), 483 sizeof(st_quirk_patterns[0]), &priority); 484 if (priority != 0) { 485 st->quirkdata = &finger->quirkdata; 486 st->drive_quirks = finger->quirkdata.quirks; 487 st->quirks = finger->quirkdata.quirks; /* start value */ 488 st->page_0_size = finger->quirkdata.page_0_size; 489 KASSERT(st->page_0_size <= MAX_PAGE_0_SIZE); 490 st_loadquirks(st); 491 } 492 } 493 494 /* 495 * initialise the subdevices to the default (QUIRK) state. 496 * this will remove any setting made by the system operator or previous 497 * operations. 498 */ 499 static void 500 st_loadquirks(struct st_softc *st) 501 { 502 const struct modes *mode; 503 struct modes *mode2; 504 int i; 505 506 mode = st->quirkdata->modes; 507 mode2 = st->modes; 508 for (i = 0; i < 4; i++) { 509 memset(mode2, 0, sizeof(struct modes)); 510 st->modeflags[i] &= ~(BLKSIZE_SET_BY_QUIRK | 511 DENSITY_SET_BY_QUIRK | BLKSIZE_SET_BY_USER | 512 DENSITY_SET_BY_USER); 513 if ((mode->quirks | st->drive_quirks) & ST_Q_FORCE_BLKSIZE) { 514 mode2->blksize = mode->blksize; 515 st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; 516 } 517 if (mode->density) { 518 mode2->density = mode->density; 519 st->modeflags[i] |= DENSITY_SET_BY_QUIRK; 520 } 521 mode2->quirks |= mode->quirks; 522 mode++; 523 mode2++; 524 } 525 } 526 527 /* open the device. */ 528 static int 529 stopen(dev_t dev, int flags, int mode, struct lwp *l) 530 { 531 u_int stmode, dsty; 532 int error, sflags, unit, tries, ntries; 533 struct st_softc *st; 534 struct scsipi_periph *periph; 535 struct scsipi_adapter *adapt; 536 537 unit = STUNIT(dev); 538 st = device_lookup_private(&st_cd, unit); 539 if (st == NULL) 540 return ENXIO; 541 542 stmode = STMODE(dev); 543 dsty = STDSTY(dev); 544 545 periph = st->sc_periph; 546 adapt = periph->periph_channel->chan_adapter; 547 548 SC_DEBUG(periph, SCSIPI_DB1, 549 ("open: dev=0x%"PRIx64" (unit %d (of %d))\n", dev, unit, 550 st_cd.cd_ndevs)); 551 552 /* Only allow one at a time */ 553 if (periph->periph_flags & PERIPH_OPEN) { 554 aprint_error_dev(st->sc_dev, "already open\n"); 555 return EBUSY; 556 } 557 558 if ((error = scsipi_adapter_addref(adapt)) != 0) 559 return error; 560 561 /* clear any latched errors. */ 562 st->mt_resid = 0; 563 st->mt_erreg = 0; 564 st->asc = 0; 565 st->ascq = 0; 566 567 /* 568 * Catch any unit attention errors. Be silent about this 569 * unless we're already mounted. We ignore media change 570 * if we're in control mode or not mounted yet. 571 */ 572 if ((st->flags & ST_MOUNTED) == 0 || stmode == CTRL_MODE) { 573 #ifdef SCSIDEBUG 574 sflags = XS_CTL_IGNORE_MEDIA_CHANGE; 575 #else 576 sflags = XS_CTL_SILENT|XS_CTL_IGNORE_MEDIA_CHANGE; 577 #endif 578 } else 579 sflags = 0; 580 581 /* 582 * If we're already mounted or we aren't configured for 583 * a mount delay, only try a test unit ready once. Otherwise, 584 * try up to ST_MOUNT_DELAY times with a rest interval of 585 * one second between each try. 586 */ 587 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0) 588 ntries = 1; 589 else 590 ntries = ST_MOUNT_DELAY; 591 592 for (error = tries = 0; tries < ntries; tries++) { 593 int slpintr, oflags; 594 595 /* 596 * If we had no error, or we're opening the control mode 597 * device, we jump out right away. 598 */ 599 error = scsipi_test_unit_ready(periph, sflags); 600 if (error == 0 || stmode == CTRL_MODE) 601 break; 602 603 /* 604 * We had an error. 605 * 606 * If we're already mounted or we aren't configured for 607 * a mount delay, or the error isn't a NOT READY error, 608 * skip to the error exit now. 609 */ 610 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0 || 611 (st->mt_key != SKEY_NOT_READY)) { 612 goto bad; 613 } 614 615 /* clear any latched errors. */ 616 st->mt_resid = 0; 617 st->mt_erreg = 0; 618 st->asc = 0; 619 st->ascq = 0; 620 621 /* 622 * Fake that we have the device open so 623 * we block other apps from getting in. 624 */ 625 oflags = periph->periph_flags; 626 periph->periph_flags |= PERIPH_OPEN; 627 628 slpintr = kpause("stload", true, hz, NULL); 629 630 periph->periph_flags = oflags; /* restore flags */ 631 if (slpintr != 0 && slpintr != EWOULDBLOCK) { 632 goto bad; 633 } 634 } 635 636 637 /* 638 * If the mode is 3 (e.g. minor = 3,7,11,15) then the device has 639 * been opened to set defaults and perform other, usually non-I/O 640 * related, operations. In this case, do a quick check to see 641 * whether the unit actually had a tape loaded (this will be known 642 * as to whether or not we got a NOT READY for the above 643 * unit attention). If a tape is there, go do a mount sequence. 644 */ 645 if (stmode == CTRL_MODE && st->mt_key == SKEY_NOT_READY) { 646 periph->periph_flags |= PERIPH_OPEN; 647 return 0; 648 } 649 650 /* 651 * If we get this far and had an error set, that means we failed 652 * to pass the 'test unit ready' test for the non-controlmode device, 653 * so we bounce the open. 654 */ 655 if (error) 656 return error; 657 658 /* Else, we're now committed to saying we're open. */ 659 periph->periph_flags |= PERIPH_OPEN; /* unit attn are now errors */ 660 661 /* 662 * If it's a different mode, or if the media has been 663 * invalidated, unmount the tape from the previous 664 * session but continue with open processing 665 */ 666 if (st->last_dsty != dsty || 667 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 668 st_unmount(st, NOEJECT); 669 670 /* 671 * If we are not mounted, then we should start a new 672 * mount session. 673 */ 674 if (!(st->flags & ST_MOUNTED)) { 675 if ((error = st_mount_tape(dev, flags)) != 0) 676 goto bad; 677 st->last_dsty = dsty; 678 } 679 if (!(st->quirks & ST_Q_NOPREVENT)) { 680 scsipi_prevent(periph, SPAMR_PREVENT_DT, 681 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 682 } 683 684 SC_DEBUG(periph, SCSIPI_DB2, ("open complete\n")); 685 return 0; 686 687 bad: 688 st_unmount(st, NOEJECT); 689 scsipi_adapter_delref(adapt); 690 periph->periph_flags &= ~PERIPH_OPEN; 691 return error; 692 } 693 694 static int 695 stclose(dev_t dev, int flags, int mode, struct lwp *l) 696 { 697 int stxx, error = 0; 698 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(dev)); 699 struct scsipi_periph *periph = st->sc_periph; 700 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 701 702 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("closing\n")); 703 704 /* 705 * Make sure that a tape opened in write-only mode will have 706 * file marks written on it when closed, even if not written to. 707 * 708 * This is for SUN compatibility. Actually, the Sun way of 709 * things is to: 710 * 711 * only write filemarks if there are fmks to be written and 712 * - open for write (possibly read/write) 713 * - the last operation was a write 714 * or: 715 * - opened for wronly 716 * - no data was written (including filemarks) 717 */ 718 719 stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); 720 if (((flags & FWRITE) && stxx == ST_WRITTEN) || 721 ((flags & O_ACCMODE) == FWRITE && stxx == 0)) { 722 int nm; 723 error = st_check_eod(st, FALSE, &nm, 0); 724 } 725 726 /* Allow robots to eject tape if needed. */ 727 scsipi_prevent(periph, SPAMR_ALLOW, 728 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 729 730 switch (STMODE(dev)) { 731 case NORMAL_MODE: 732 st_unmount(st, NOEJECT); 733 break; 734 case NOREW_MODE: 735 case CTRL_MODE: 736 /* 737 * Leave mounted unless media seems to have been removed. 738 * 739 * Otherwise, if we're to terminate a tape with more than one 740 * filemark [ and because we're not rewinding here ], backspace 741 * one filemark so that later appends will see an unbroken 742 * sequence of: 743 * 744 * file - FMK - file - FMK ... file - FMK FMK (EOM) 745 */ 746 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 747 st_unmount(st, NOEJECT); 748 } else if (error == 0) { 749 /* 750 * ST_WRITTEN was preserved from above. 751 * 752 * All we need to know here is: 753 * 754 * Were we writing this tape and was the last 755 * operation a write? 756 * 757 * Are there supposed to be 2FM at EOD? 758 * 759 * If both statements are true, then we backspace 760 * one filemark. 761 */ 762 stxx |= (st->flags & ST_2FM_AT_EOD); 763 if ((flags & FWRITE) != 0 && 764 (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { 765 error = st_space(st, -1, SP_FILEMARKS, 0); 766 } 767 } 768 break; 769 case EJECT_MODE: 770 st_unmount(st, EJECT); 771 break; 772 } 773 774 scsipi_wait_drain(periph); 775 776 scsipi_adapter_delref(adapt); 777 periph->periph_flags &= ~PERIPH_OPEN; 778 779 return error; 780 } 781 782 /* 783 * Start a new mount session. 784 * Copy in all the default parameters from the selected device mode. 785 * and try guess any that seem to be defaulted. 786 */ 787 static int 788 st_mount_tape(dev_t dev, int flags) 789 { 790 int unit; 791 u_int dsty; 792 struct st_softc *st; 793 struct scsipi_periph *periph; 794 int error = 0; 795 796 unit = STUNIT(dev); 797 dsty = STDSTY(dev); 798 st = device_lookup_private(&st_cd, unit); 799 periph = st->sc_periph; 800 801 if (st->flags & ST_MOUNTED) 802 return 0; 803 804 SC_DEBUG(periph, SCSIPI_DB1, ("mounting\n ")); 805 st->flags |= ST_NEW_MOUNT; 806 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 807 /* 808 * If the media is new, then make sure we give it a chance to 809 * to do a 'load' instruction. (We assume it is new.) 810 */ 811 if ((error = st_load(st, LD_LOAD, XS_CTL_SILENT)) != 0) 812 return error; 813 /* 814 * Throw another dummy instruction to catch 815 * 'Unit attention' errors. Many drives give 816 * these after doing a Load instruction (with 817 * the MEDIUM MAY HAVE CHANGED asc/ascq). 818 */ 819 scsipi_test_unit_ready(periph, XS_CTL_SILENT); /* XXX */ 820 821 /* 822 * Some devices can't tell you much until they have been 823 * asked to look at the media. This quirk does this. 824 */ 825 if (st->quirks & ST_Q_SENSE_HELP) 826 if ((error = st_touch_tape(st)) != 0) 827 return error; 828 /* 829 * Load the physical device parameters 830 * loads: blkmin, blkmax 831 */ 832 if ((error = st->ops(st, ST_OPS_RBL, 0)) != 0) 833 return error; 834 /* 835 * Load the media dependent parameters 836 * includes: media_blksize,media_density,numblks 837 * As we have a tape in, it should be reflected here. 838 * If not you may need the "quirk" above. 839 */ 840 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 841 return error; 842 /* 843 * If we have gained a permanent density from somewhere, 844 * then use it in preference to the one supplied by 845 * default by the driver. 846 */ 847 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 848 st->density = st->modes[dsty].density; 849 else 850 st->density = st->media_density; 851 /* 852 * If we have gained a permanent blocksize 853 * then use it in preference to the one supplied by 854 * default by the driver. 855 */ 856 st->flags &= ~ST_FIXEDBLOCKS; 857 if (st->modeflags[dsty] & 858 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 859 st->blksize = st->modes[dsty].blksize; 860 if (st->blksize) 861 st->flags |= ST_FIXEDBLOCKS; 862 } else { 863 if ((error = st_decide_mode(st, FALSE)) != 0) 864 return error; 865 } 866 if ((error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 867 /* ATAPI will return ENODEV for this, and this may be OK */ 868 if (error != ENODEV) { 869 aprint_error_dev(st->sc_dev, 870 "cannot set selected mode\n"); 871 return error; 872 } 873 } 874 st->flags &= ~ST_NEW_MOUNT; 875 st->flags |= ST_MOUNTED; 876 periph->periph_flags |= PERIPH_MEDIA_LOADED; /* move earlier? */ 877 st->blkno = st->fileno = (daddr_t) 0; 878 return 0; 879 } 880 881 /* 882 * End the present mount session. 883 * Rewind, and optionally eject the tape. 884 * Reset various flags to indicate that all new 885 * operations require another mount operation 886 */ 887 static void 888 st_unmount(struct st_softc *st, boolean eject) 889 { 890 struct scsipi_periph *periph = st->sc_periph; 891 int nmarks; 892 893 if ((st->flags & ST_MOUNTED) == 0) 894 return; 895 SC_DEBUG(periph, SCSIPI_DB1, ("unmounting\n")); 896 st_check_eod(st, FALSE, &nmarks, XS_CTL_IGNORE_NOT_READY); 897 st_rewind(st, 0, XS_CTL_IGNORE_NOT_READY); 898 899 /* 900 * Section 9.3.3 of the SCSI specs states that a device shall return 901 * the density value specified in the last succesfull MODE SELECT 902 * after an unload operation, in case it is not able to 903 * automatically determine the density of the new medium. 904 * 905 * So we instruct the device to use the default density, which will 906 * prevent the use of stale density values (in particular, 907 * in st_touch_tape(). 908 */ 909 st->density = 0; 910 if (st->ops(st, ST_OPS_MODESELECT, 0) != 0) { 911 aprint_error_dev(st->sc_dev, 912 "WARNING: cannot revert to default density\n"); 913 } 914 915 if (eject) { 916 if (!(st->quirks & ST_Q_NOPREVENT)) { 917 scsipi_prevent(periph, SPAMR_ALLOW, 918 XS_CTL_IGNORE_ILLEGAL_REQUEST | 919 XS_CTL_IGNORE_NOT_READY); 920 } 921 st_load(st, LD_UNLOAD, XS_CTL_IGNORE_NOT_READY); 922 st->blkno = st->fileno = (daddr_t) -1; 923 } else { 924 st->blkno = st->fileno = (daddr_t) 0; 925 } 926 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 927 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 928 } 929 930 /* 931 * Given all we know about the device, media, mode, 'quirks' and 932 * initial operation, make a decision as to how we should be set 933 * to run (regarding blocking and EOD marks) 934 */ 935 int 936 st_decide_mode(struct st_softc *st, boolean first_read) 937 { 938 939 SC_DEBUG(st->sc_periph, SCSIPI_DB2, ("starting block mode decision\n")); 940 941 /* 942 * If the drive can only handle fixed-length blocks and only at 943 * one size, perhaps we should just do that. 944 */ 945 if (st->blkmin && (st->blkmin == st->blkmax)) { 946 st->flags |= ST_FIXEDBLOCKS; 947 st->blksize = st->blkmin; 948 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 949 ("blkmin == blkmax of %d\n", st->blkmin)); 950 goto done; 951 } 952 /* 953 * If the tape density mandates (or even suggests) use of fixed 954 * or variable-length blocks, comply. 955 */ 956 switch (st->density) { 957 case HALFINCH_800: 958 case HALFINCH_1600: 959 case HALFINCH_6250: 960 case DDS: 961 st->flags &= ~ST_FIXEDBLOCKS; 962 st->blksize = 0; 963 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 964 ("density specified variable\n")); 965 goto done; 966 case QIC_11: 967 case QIC_24: 968 case QIC_120: 969 case QIC_150: 970 case QIC_525: 971 case QIC_1320: 972 case QIC_3095: 973 case QIC_3220: 974 st->flags |= ST_FIXEDBLOCKS; 975 if (st->media_blksize > 0) 976 st->blksize = st->media_blksize; 977 else 978 st->blksize = DEF_FIXED_BSIZE; 979 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 980 ("density specified fixed\n")); 981 goto done; 982 } 983 /* 984 * If we're about to read the tape, perhaps we should choose 985 * fixed or variable-length blocks and block size according to 986 * what the drive found on the tape. 987 */ 988 if (first_read && 989 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 990 (st->media_blksize == DEF_FIXED_BSIZE) || 991 (st->media_blksize == 1024))) { 992 if (st->media_blksize > 0) 993 st->flags |= ST_FIXEDBLOCKS; 994 else 995 st->flags &= ~ST_FIXEDBLOCKS; 996 st->blksize = st->media_blksize; 997 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 998 ("Used media_blksize of %d\n", st->media_blksize)); 999 goto done; 1000 } 1001 /* 1002 * We're getting no hints from any direction. Choose variable- 1003 * length blocks arbitrarily. 1004 */ 1005 st->flags &= ~ST_FIXEDBLOCKS; 1006 st->blksize = 0; 1007 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1008 ("Give up and default to variable mode\n")); 1009 1010 done: 1011 /* 1012 * Decide whether or not to write two file marks to signify end- 1013 * of-data. Make the decision as a function of density. If 1014 * the decision is not to use a second file mark, the SCSI BLANK 1015 * CHECK condition code will be recognized as end-of-data when 1016 * first read. 1017 * (I think this should be a by-product of fixed/variable..julian) 1018 */ 1019 switch (st->density) { 1020 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 1021 case QIC_11: 1022 case QIC_24: 1023 case QIC_120: 1024 case QIC_150: 1025 case QIC_525: 1026 case QIC_1320: 1027 case QIC_3095: 1028 case QIC_3220: 1029 st->flags &= ~ST_2FM_AT_EOD; 1030 break; 1031 default: 1032 st->flags |= ST_2FM_AT_EOD; 1033 } 1034 return 0; 1035 } 1036 1037 /* 1038 * Actually translate the requested transfer into 1039 * one the physical driver can understand 1040 * The transfer is described by a buf and will include 1041 * only one physical transfer. 1042 */ 1043 static void 1044 ststrategy(struct buf *bp) 1045 { 1046 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(bp->b_dev)); 1047 struct scsipi_periph *periph = st->sc_periph; 1048 struct scsipi_channel *chan = periph->periph_channel; 1049 1050 SC_DEBUG(periph, SCSIPI_DB1, 1051 ("ststrategy %d bytes @ blk %" PRId64 "\n", bp->b_bcount, 1052 bp->b_blkno)); 1053 /* If it's a null transfer, return immediately */ 1054 if (bp->b_bcount == 0) 1055 goto abort; 1056 1057 /* If offset is negative, error */ 1058 if (bp->b_blkno < 0) { 1059 bp->b_error = EINVAL; 1060 goto abort; 1061 } 1062 1063 /* Odd sized request on fixed drives are verboten */ 1064 if (st->flags & ST_FIXEDBLOCKS) { 1065 if (bp->b_bcount % st->blksize) { 1066 aprint_error_dev(st->sc_dev, "bad request, must be multiple of %d\n", 1067 st->blksize); 1068 bp->b_error = EIO; 1069 goto abort; 1070 } 1071 } 1072 /* as are out-of-range requests on variable drives. */ 1073 else if (bp->b_bcount < st->blkmin || 1074 (st->blkmax && bp->b_bcount > st->blkmax)) { 1075 aprint_error_dev(st->sc_dev, "bad request, must be between %d and %d\n", 1076 st->blkmin, st->blkmax); 1077 bp->b_error = EIO; 1078 goto abort; 1079 } 1080 mutex_enter(chan_mtx(chan)); 1081 1082 /* 1083 * Place it in the queue of activities for this tape 1084 * at the end (a bit silly because we only have on user.. 1085 * (but it could fork())) 1086 */ 1087 bufq_put(st->buf_queue, bp); 1088 1089 /* 1090 * Tell the device to get going on the transfer if it's 1091 * not doing anything, otherwise just wait for completion 1092 * (All a bit silly if we're only allowing 1 open but..) 1093 */ 1094 ststart(periph); 1095 1096 mutex_exit(chan_mtx(chan)); 1097 return; 1098 abort: 1099 /* 1100 * Reset the residue because we didn't do anything, 1101 * and send the buffer back as done. 1102 */ 1103 bp->b_resid = bp->b_bcount; 1104 biodone(bp); 1105 return; 1106 } 1107 1108 /* 1109 * ststart looks to see if there is a buf waiting for the device 1110 * and that the device is not already busy. If both are true, 1111 * It dequeues the buf and creates a scsi command to perform the 1112 * transfer required. The transfer request will call scsipi_done 1113 * on completion, which will in turn call this routine again 1114 * so that the next queued transfer is performed. 1115 * The bufs are queued by the strategy routine (ststrategy) 1116 * 1117 * This routine is also called after other non-queued requests 1118 * have been made of the scsi driver, to ensure that the queue 1119 * continues to be drained. 1120 * ststart() is called with channel lock held 1121 */ 1122 static void 1123 ststart(struct scsipi_periph *periph) 1124 { 1125 struct st_softc *st = device_private(periph->periph_dev); 1126 struct buf *bp; 1127 struct scsi_rw_tape cmd; 1128 struct scsipi_xfer *xs; 1129 int flags, error __diagused; 1130 1131 SC_DEBUG(periph, SCSIPI_DB2, ("ststart ")); 1132 /* See if there is a buf to do and we are not already doing one */ 1133 while (periph->periph_active < periph->periph_openings) { 1134 /* if a special awaits, let it proceed first */ 1135 if (periph->periph_flags & PERIPH_WAITING) { 1136 periph->periph_flags &= ~PERIPH_WAITING; 1137 cv_broadcast(periph_cv_periph(periph)); 1138 return; 1139 } 1140 1141 /* 1142 * If the device has been unmounted by the user 1143 * then throw away all requests until done. 1144 */ 1145 if (__predict_false((st->flags & ST_MOUNTED) == 0 || 1146 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0)) { 1147 if ((bp = bufq_get(st->buf_queue)) != NULL) { 1148 /* make sure that one implies the other.. */ 1149 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 1150 bp->b_error = EIO; 1151 bp->b_resid = bp->b_bcount; 1152 biodone(bp); 1153 continue; 1154 } else 1155 return; 1156 } 1157 1158 if ((bp = bufq_peek(st->buf_queue)) == NULL) 1159 return; 1160 1161 iostat_busy(st->stats); 1162 1163 /* 1164 * only FIXEDBLOCK devices have pending I/O or space operations. 1165 */ 1166 if (st->flags & ST_FIXEDBLOCKS) { 1167 /* 1168 * If we are at a filemark but have not reported it yet 1169 * then we should report it now 1170 */ 1171 if (st->flags & ST_AT_FILEMARK) { 1172 if ((bp->b_flags & B_READ) == B_WRITE) { 1173 /* 1174 * Handling of ST_AT_FILEMARK in 1175 * st_space will fill in the right file 1176 * mark count. 1177 * Back up over filemark 1178 */ 1179 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1180 bufq_get(st->buf_queue); 1181 bp->b_error = EIO; 1182 bp->b_resid = bp->b_bcount; 1183 biodone(bp); 1184 continue; 1185 } 1186 } else { 1187 bufq_get(st->buf_queue); 1188 bp->b_resid = bp->b_bcount; 1189 bp->b_error = 0; 1190 st->flags &= ~ST_AT_FILEMARK; 1191 biodone(bp); 1192 continue; /* seek more work */ 1193 } 1194 } 1195 } 1196 /* 1197 * If we are at EOM but have not reported it 1198 * yet then we should report it now. 1199 */ 1200 if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { 1201 bufq_get(st->buf_queue); 1202 bp->b_resid = bp->b_bcount; 1203 if (st->flags & ST_EIO_PENDING) 1204 bp->b_error = EIO; 1205 st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); 1206 biodone(bp); 1207 continue; /* seek more work */ 1208 } 1209 1210 /* Fill out the scsi command */ 1211 memset(&cmd, 0, sizeof(cmd)); 1212 flags = XS_CTL_NOSLEEP | XS_CTL_ASYNC; 1213 if ((bp->b_flags & B_READ) == B_WRITE) { 1214 cmd.opcode = WRITE; 1215 st->flags &= ~ST_FM_WRITTEN; 1216 flags |= XS_CTL_DATA_OUT; 1217 } else { 1218 cmd.opcode = READ; 1219 flags |= XS_CTL_DATA_IN; 1220 } 1221 1222 /* 1223 * Handle "fixed-block-mode" tape drives by using the 1224 * block count instead of the length. 1225 */ 1226 if (st->flags & ST_FIXEDBLOCKS) { 1227 cmd.byte2 |= SRW_FIXED; 1228 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1229 } else 1230 _lto3b(bp->b_bcount, cmd.len); 1231 1232 /* Clear 'position updated' indicator */ 1233 st->flags &= ~ST_POSUPDATED; 1234 1235 /* go ask the adapter to do all this for us */ 1236 xs = scsipi_make_xs_locked(periph, 1237 (struct scsipi_generic *)&cmd, sizeof(cmd), 1238 (u_char *)bp->b_data, bp->b_bcount, 1239 0, ST_IO_TIME, bp, flags); 1240 if (__predict_false(xs == NULL)) { 1241 /* 1242 * out of memory. Keep this buffer in the queue, and 1243 * retry later. 1244 */ 1245 callout_reset(&st->sc_callout, hz / 2, strestart, 1246 periph); 1247 return; 1248 } 1249 /* 1250 * need to dequeue the buffer before queuing the command, 1251 * because cdstart may be called recursively from the 1252 * HBA driver 1253 */ 1254 #ifdef DIAGNOSTIC 1255 if (bufq_get(st->buf_queue) != bp) 1256 panic("ststart(): dequeued wrong buf"); 1257 #else 1258 bufq_get(st->buf_queue); 1259 #endif 1260 error = scsipi_execute_xs(xs); 1261 /* with a scsipi_xfer preallocated, scsipi_command can't fail */ 1262 KASSERT(error == 0); 1263 } /* go back and see if we can cram more work in.. */ 1264 } 1265 1266 static void 1267 strestart(void *v) 1268 { 1269 struct scsipi_periph *periph = (struct scsipi_periph *)v; 1270 struct scsipi_channel *chan = periph->periph_channel; 1271 1272 mutex_enter(chan_mtx(chan)); 1273 ststart((struct scsipi_periph *)v); 1274 mutex_exit(chan_mtx(chan)); 1275 } 1276 1277 static void 1278 stdone(struct scsipi_xfer *xs, int error) 1279 { 1280 struct st_softc *st = device_private(xs->xs_periph->periph_dev); 1281 struct buf *bp = xs->bp; 1282 1283 if (bp) { 1284 bp->b_error = error; 1285 bp->b_resid = xs->resid; 1286 /* 1287 * buggy device ? A SDLT320 can report an info 1288 * field of 0x3de8000 on a Media Error/Write Error 1289 * for this CBD: 0x0a 00 00 80 00 00 1290 */ 1291 if (bp->b_resid > bp->b_bcount || bp->b_resid < 0) 1292 bp->b_resid = bp->b_bcount; 1293 1294 if ((bp->b_flags & B_READ) == B_WRITE) 1295 st->flags |= ST_WRITTEN; 1296 else 1297 st->flags &= ~ST_WRITTEN; 1298 1299 iostat_unbusy(st->stats, bp->b_bcount, 1300 ((bp->b_flags & B_READ) == B_READ)); 1301 1302 rnd_add_uint32(&st->rnd_source, bp->b_blkno); 1303 1304 if ((st->flags & ST_POSUPDATED) == 0) { 1305 if (error) { 1306 st->fileno = st->blkno = -1; 1307 } else if (st->blkno != -1) { 1308 if (st->flags & ST_FIXEDBLOCKS) 1309 st->blkno += 1310 (bp->b_bcount / st->blksize); 1311 else 1312 st->blkno++; 1313 } 1314 } 1315 biodone(bp); 1316 } 1317 } 1318 1319 static int 1320 stread(dev_t dev, struct uio *uio, int iomode) 1321 { 1322 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(dev)); 1323 1324 return physio(ststrategy, NULL, dev, B_READ, 1325 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio); 1326 } 1327 1328 static int 1329 stwrite(dev_t dev, struct uio *uio, int iomode) 1330 { 1331 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(dev)); 1332 1333 return physio(ststrategy, NULL, dev, B_WRITE, 1334 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio); 1335 } 1336 1337 /* 1338 * Perform special action on behalf of the user; 1339 * knows about the internals of this device 1340 */ 1341 static int 1342 stioctl(dev_t dev, u_long cmd, void *arg, int flag, struct lwp *l) 1343 { 1344 int error = 0; 1345 int unit; 1346 int number, nmarks, dsty; 1347 int flags; 1348 struct st_softc *st; 1349 int hold_blksize; 1350 uint8_t hold_density; 1351 struct mtop *mt = (struct mtop *) arg; 1352 1353 /* Find the device that the user is talking about */ 1354 flags = 0; /* give error messages, act on errors etc. */ 1355 unit = STUNIT(dev); 1356 dsty = STDSTY(dev); 1357 st = device_lookup_private(&st_cd, unit); 1358 hold_blksize = st->blksize; 1359 hold_density = st->density; 1360 1361 switch ((u_int)cmd) { 1362 case MTIOCGET: { 1363 struct mtget *g = (struct mtget *) arg; 1364 /* 1365 * (to get the current state of READONLY) 1366 */ 1367 error = st->ops(st, ST_OPS_MODESENSE, XS_CTL_SILENT); 1368 if (error) { 1369 /* 1370 * Ignore the error if in control mode; 1371 * this is mandated by st(4). 1372 */ 1373 if (STMODE(dev) != CTRL_MODE) 1374 break; 1375 error = 0; 1376 } 1377 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("[ioctl: get status]\n")); 1378 memset(g, 0, sizeof(struct mtget)); 1379 g->mt_type = MT_ISAR; /* Ultrix compat *//*? */ 1380 g->mt_blksiz = st->blksize; 1381 g->mt_density = st->density; 1382 g->mt_mblksiz[0] = st->modes[0].blksize; 1383 g->mt_mblksiz[1] = st->modes[1].blksize; 1384 g->mt_mblksiz[2] = st->modes[2].blksize; 1385 g->mt_mblksiz[3] = st->modes[3].blksize; 1386 g->mt_mdensity[0] = st->modes[0].density; 1387 g->mt_mdensity[1] = st->modes[1].density; 1388 g->mt_mdensity[2] = st->modes[2].density; 1389 g->mt_mdensity[3] = st->modes[3].density; 1390 g->mt_fileno = st->fileno; 1391 g->mt_blkno = st->blkno; 1392 if (st->flags & ST_READONLY) 1393 g->mt_dsreg |= MT_DS_RDONLY; 1394 if (st->flags & ST_MOUNTED) 1395 g->mt_dsreg |= MT_DS_MOUNTED; 1396 g->mt_resid = st->mt_resid; 1397 g->mt_erreg = st->mt_erreg; 1398 /* 1399 * clear latched errors. 1400 */ 1401 st->mt_resid = 0; 1402 st->mt_erreg = 0; 1403 st->asc = 0; 1404 st->ascq = 0; 1405 break; 1406 } 1407 case MTIOCTOP: { 1408 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1409 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1410 mt->mt_count)); 1411 1412 /* compat: in U*x it is a short */ 1413 number = mt->mt_count; 1414 switch ((short) (mt->mt_op)) { 1415 case MTWEOF: /* write an end-of-file record */ 1416 error = st_write_filemarks(st, number, flags); 1417 break; 1418 case MTBSF: /* backward space file */ 1419 number = -number; 1420 case MTFSF: /* forward space file */ 1421 error = st_check_eod(st, FALSE, &nmarks, flags); 1422 if (!error) 1423 error = st_space(st, number - nmarks, 1424 SP_FILEMARKS, flags); 1425 break; 1426 case MTBSR: /* backward space record */ 1427 number = -number; 1428 case MTFSR: /* forward space record */ 1429 error = st_check_eod(st, true, &nmarks, flags); 1430 if (!error) 1431 error = st_space(st, number, SP_BLKS, flags); 1432 break; 1433 case MTREW: /* rewind */ 1434 error = st_rewind(st, 0, flags); 1435 break; 1436 case MTOFFL: /* rewind and put the drive offline */ 1437 st_unmount(st, EJECT); 1438 break; 1439 case MTNOP: /* no operation, sets status only */ 1440 break; 1441 case MTRETEN: /* retension the tape */ 1442 error = st_load(st, LD_RETENSION, flags); 1443 if (!error) 1444 error = st_load(st, LD_LOAD, flags); 1445 break; 1446 case MTEOM: /* forward space to end of media */ 1447 error = st_check_eod(st, FALSE, &nmarks, flags); 1448 if (!error) 1449 error = st_space(st, 1, SP_EOM, flags); 1450 break; 1451 case MTCACHE: /* enable controller cache */ 1452 st->flags &= ~ST_DONTBUFFER; 1453 goto try_new_value; 1454 case MTNOCACHE: /* disable controller cache */ 1455 st->flags |= ST_DONTBUFFER; 1456 goto try_new_value; 1457 case MTERASE: /* erase volume */ 1458 error = st_erase(st, number, flags); 1459 break; 1460 case MTSETBSIZ: /* Set block size for device */ 1461 #ifdef NOTYET 1462 if (!(st->flags & ST_NEW_MOUNT)) { 1463 uprintf("re-mount tape before changing " 1464 "blocksize"); 1465 error = EINVAL; 1466 break; 1467 } 1468 #endif 1469 if (number == 0) 1470 st->flags &= ~ST_FIXEDBLOCKS; 1471 else { 1472 if ((st->blkmin || st->blkmax) && 1473 (number < st->blkmin || 1474 number > st->blkmax)) { 1475 error = EINVAL; 1476 break; 1477 } 1478 st->flags |= ST_FIXEDBLOCKS; 1479 } 1480 st->blksize = number; 1481 st->flags |= ST_BLOCK_SET; /*XXX */ 1482 goto try_new_value; 1483 case MTSETDNSTY: /* Set density for device and mode */ 1484 /* 1485 * Any number >= 0 and <= 0xff is legal. Numbers 1486 * above 0x80 are 'vendor unique'. 1487 */ 1488 if (number < 0 || number > 255) { 1489 error = EINVAL; 1490 break; 1491 } else 1492 st->density = number; 1493 goto try_new_value; 1494 case MTCMPRESS: 1495 error = st->ops(st, (number == 0) ? 1496 ST_OPS_CMPRSS_OFF : ST_OPS_CMPRSS_ON, 1497 XS_CTL_SILENT); 1498 break; 1499 case MTEWARN: 1500 if (number) 1501 st->flags |= ST_EARLYWARN; 1502 else 1503 st->flags &= ~ST_EARLYWARN; 1504 break; 1505 1506 default: 1507 error = EINVAL; 1508 } 1509 break; 1510 } 1511 case MTIOCIEOT: 1512 case MTIOCEEOT: 1513 break; 1514 case MTIOCRDSPOS: 1515 error = st_rdpos(st, 0, (uint32_t *)arg); 1516 break; 1517 case MTIOCRDHPOS: 1518 error = st_rdpos(st, 1, (uint32_t *)arg); 1519 break; 1520 case MTIOCSLOCATE: 1521 error = st_setpos(st, 0, (uint32_t *)arg); 1522 break; 1523 case MTIOCHLOCATE: 1524 error = st_setpos(st, 1, (uint32_t *)arg); 1525 break; 1526 default: 1527 error = scsipi_do_ioctl(st->sc_periph, dev, cmd, arg, flag, l); 1528 break; 1529 } 1530 return error; 1531 1532 try_new_value: 1533 /* 1534 * Check that the mode being asked for is aggreeable to the 1535 * drive. If not, put it back the way it was. 1536 * 1537 * If in control mode, we can make (persistent) mode changes 1538 * even if no medium is loaded (see st(4)). 1539 */ 1540 if ((STMODE(dev) != CTRL_MODE || (st->flags & ST_MOUNTED) != 0) && 1541 (error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 1542 /* put it back as it was */ 1543 aprint_error_dev(st->sc_dev, "cannot set selected mode\n"); 1544 st->density = hold_density; 1545 st->blksize = hold_blksize; 1546 if (st->blksize) 1547 st->flags |= ST_FIXEDBLOCKS; 1548 else 1549 st->flags &= ~ST_FIXEDBLOCKS; 1550 return error; 1551 } 1552 /* 1553 * As the drive liked it, if we are setting a new default, 1554 * set it into the structures as such. 1555 * 1556 * The means for deciding this are not finalised yet- but 1557 * if the device was opened in Control Mode, the values 1558 * are persistent now across mounts. 1559 */ 1560 if (STMODE(dev) == CTRL_MODE) { 1561 switch ((short) (mt->mt_op)) { 1562 case MTSETBSIZ: 1563 st->modes[dsty].blksize = st->blksize; 1564 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1565 break; 1566 case MTSETDNSTY: 1567 st->modes[dsty].density = st->density; 1568 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1569 break; 1570 } 1571 } 1572 return 0; 1573 } 1574 1575 /* Do a synchronous read. */ 1576 static int 1577 st_read(struct st_softc *st, char *bf, int size, int flags) 1578 { 1579 struct scsi_rw_tape cmd; 1580 1581 /* If it's a null transfer, return immediatly */ 1582 if (size == 0) 1583 return 0; 1584 memset(&cmd, 0, sizeof(cmd)); 1585 cmd.opcode = READ; 1586 if (st->flags & ST_FIXEDBLOCKS) { 1587 cmd.byte2 |= SRW_FIXED; 1588 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1589 cmd.len); 1590 } else 1591 _lto3b(size, cmd.len); 1592 return scsipi_command(st->sc_periph, 1593 (void *)&cmd, sizeof(cmd), (void *)bf, size, 0, ST_IO_TIME, NULL, 1594 flags | XS_CTL_DATA_IN); 1595 } 1596 1597 /* issue an erase command */ 1598 static int 1599 st_erase(struct st_softc *st, int full, int flags) 1600 { 1601 int tmo; 1602 struct scsi_erase cmd; 1603 1604 /* 1605 * Full erase means set LONG bit in erase command, which asks 1606 * the drive to erase the entire unit. Without this bit, we're 1607 * asking the drive to write an erase gap. 1608 */ 1609 memset(&cmd, 0, sizeof(cmd)); 1610 cmd.opcode = ERASE; 1611 if (full) { 1612 cmd.byte2 = SE_LONG; 1613 tmo = ST_SPC_TIME; 1614 } else 1615 tmo = ST_IO_TIME; 1616 1617 /* 1618 * XXX We always do this asynchronously, for now, unless the device 1619 * has the ST_Q_ERASE_NOIMM quirk. How long should we wait if we 1620 * want to (eventually) to it synchronously? 1621 */ 1622 if ((st->quirks & ST_Q_ERASE_NOIMM) == 0) 1623 cmd.byte2 |= SE_IMMED; 1624 1625 return scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1626 ST_RETRIES, tmo, NULL, flags); 1627 } 1628 1629 /* skip N blocks/filemarks/seq filemarks/eom */ 1630 static int 1631 st_space(struct st_softc *st, int number, u_int what, int flags) 1632 { 1633 struct scsi_space cmd; 1634 int error; 1635 1636 switch (what) { 1637 case SP_BLKS: 1638 if (st->flags & ST_PER_ACTION) { 1639 if (number > 0) { 1640 st->flags &= ~ST_PER_ACTION; 1641 return EIO; 1642 } else if (number < 0) { 1643 if (st->flags & ST_AT_FILEMARK) { 1644 /* 1645 * Handling of ST_AT_FILEMARK 1646 * in st_space will fill in the 1647 * right file mark count. 1648 */ 1649 error = st_space(st, 0, SP_FILEMARKS, 1650 flags); 1651 if (error) 1652 return error; 1653 } 1654 if (st->flags & ST_BLANK_READ) { 1655 st->flags &= ~ST_BLANK_READ; 1656 return EIO; 1657 } 1658 st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); 1659 } 1660 } 1661 break; 1662 case SP_FILEMARKS: 1663 if (st->flags & ST_EIO_PENDING) { 1664 if (number > 0) { 1665 /* pretend we just discovered the error */ 1666 st->flags &= ~ST_EIO_PENDING; 1667 return EIO; 1668 } else if (number < 0) { 1669 /* back away from the error */ 1670 st->flags &= ~ST_EIO_PENDING; 1671 } 1672 } 1673 if (st->flags & ST_AT_FILEMARK) { 1674 st->flags &= ~ST_AT_FILEMARK; 1675 number--; 1676 } 1677 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 1678 /* back away from unwritten tape */ 1679 st->flags &= ~ST_BLANK_READ; 1680 number++; /* XXX dubious */ 1681 } 1682 break; 1683 case SP_EOM: 1684 if (st->flags & ST_EOM_PENDING) { 1685 /* we're already there */ 1686 st->flags &= ~ST_EOM_PENDING; 1687 return 0; 1688 } 1689 if (st->flags & ST_EIO_PENDING) { 1690 /* pretend we just discovered the error */ 1691 st->flags &= ~ST_EIO_PENDING; 1692 return EIO; 1693 } 1694 if (st->flags & ST_AT_FILEMARK) 1695 st->flags &= ~ST_AT_FILEMARK; 1696 break; 1697 } 1698 if (number == 0) 1699 return 0; 1700 1701 memset(&cmd, 0, sizeof(cmd)); 1702 cmd.opcode = SPACE; 1703 cmd.byte2 = what; 1704 _lto3b(number, cmd.number); 1705 1706 st->flags &= ~ST_POSUPDATED; 1707 st->last_ctl_resid = 0; 1708 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1709 0, ST_SPC_TIME, NULL, flags); 1710 1711 if (error == 0 && (st->flags & ST_POSUPDATED) == 0) { 1712 number = number - st->last_ctl_resid; 1713 if (what == SP_BLKS) { 1714 if (st->blkno != -1) 1715 st->blkno += number; 1716 } else if (what == SP_FILEMARKS) { 1717 if (st->fileno != -1) { 1718 st->fileno += number; 1719 if (number > 0) 1720 st->blkno = 0; 1721 else if (number < 0) 1722 st->blkno = -1; 1723 } 1724 } else if (what == SP_EOM) { 1725 /* This loses us relative position. */ 1726 st->fileno = st->blkno = -1; 1727 } 1728 } 1729 return error; 1730 } 1731 1732 /* 1733 * write N filemarks 1734 */ 1735 static int 1736 st_write_filemarks(struct st_softc *st, int number, int flags) 1737 { 1738 int error; 1739 struct scsi_write_filemarks cmd; 1740 1741 /* 1742 * It's hard to write a negative number of file marks. 1743 * Don't try. 1744 */ 1745 if (number < 0) 1746 return EINVAL; 1747 switch (number) { 1748 case 0: /* really a command to sync the drive's buffers */ 1749 break; 1750 case 1: 1751 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 1752 st->flags &= ~ST_WRITTEN; 1753 else 1754 st->flags |= ST_FM_WRITTEN; 1755 st->flags &= ~ST_PER_ACTION; 1756 break; 1757 default: 1758 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 1759 } 1760 1761 memset(&cmd, 0, sizeof(cmd)); 1762 cmd.opcode = WRITE_FILEMARKS; 1763 if (SCSIPI_BUSTYPE_TYPE(scsipi_periph_bustype(st->sc_periph)) == 1764 SCSIPI_BUSTYPE_ATAPI) 1765 cmd.byte2 = SR_IMMED; 1766 /* 1767 * The ATAPI Onstream DI-30 doesn't support writing filemarks, but 1768 * WRITE_FILEMARKS is still used to flush the buffer 1769 */ 1770 if ((st->quirks & ST_Q_NOFILEMARKS) == 0) 1771 _lto3b(number, cmd.number); 1772 1773 /* XXX WE NEED TO BE ABLE TO GET A RESIDIUAL XXX */ 1774 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1775 0, ST_IO_TIME * 4, NULL, flags); 1776 if (error == 0 && st->fileno != -1) 1777 st->fileno += number; 1778 return error; 1779 } 1780 1781 /* 1782 * Make sure the right number of file marks is on tape if the 1783 * tape has been written. If the position argument is true, 1784 * leave the tape positioned where it was originally. 1785 * 1786 * nmarks returns the number of marks to skip (or, if position 1787 * true, which were skipped) to get back original position. 1788 */ 1789 static int 1790 st_check_eod(struct st_softc *st, boolean position, int *nmarks, int flags) 1791 { 1792 int error; 1793 1794 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 1795 default: 1796 *nmarks = 0; 1797 return 0; 1798 case ST_WRITTEN: 1799 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 1800 *nmarks = 1; 1801 break; 1802 case ST_WRITTEN | ST_2FM_AT_EOD: 1803 *nmarks = 2; 1804 } 1805 error = st_write_filemarks(st, *nmarks, flags); 1806 if (position && !error) 1807 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 1808 return error; 1809 } 1810 1811 /* load/unload/retension */ 1812 static int 1813 st_load(struct st_softc *st, u_int type, int flags) 1814 { 1815 int error; 1816 struct scsi_load cmd; 1817 1818 if (type != LD_LOAD) { 1819 int nmarks; 1820 1821 error = st_check_eod(st, FALSE, &nmarks, flags); 1822 if (error) { 1823 aprint_error_dev(st->sc_dev, 1824 "failed to write closing filemarks at " 1825 "unload, errno=%d\n", error); 1826 return error; 1827 } 1828 } 1829 if (st->quirks & ST_Q_IGNORE_LOADS) { 1830 if (type == LD_LOAD) 1831 /* 1832 * If we ignore loads, at least we should try a rewind. 1833 */ 1834 return st_rewind(st, 0, flags); 1835 /* otherwise, we should do what's asked of us */ 1836 } 1837 1838 memset(&cmd, 0, sizeof(cmd)); 1839 cmd.opcode = LOAD; 1840 if (SCSIPI_BUSTYPE_TYPE(scsipi_periph_bustype(st->sc_periph)) == 1841 SCSIPI_BUSTYPE_ATAPI) 1842 cmd.byte2 = SR_IMMED; 1843 cmd.how = type; 1844 1845 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1846 ST_RETRIES, ST_SPC_TIME, NULL, flags); 1847 if (error) { 1848 aprint_error_dev(st->sc_dev, "error %d in st_load (op %d)\n", 1849 error, type); 1850 } 1851 return error; 1852 } 1853 1854 /* Rewind the device */ 1855 static int 1856 st_rewind(struct st_softc *st, u_int immediate, int flags) 1857 { 1858 struct scsi_rewind cmd; 1859 int error; 1860 int nmarks; 1861 int timeout; 1862 1863 error = st_check_eod(st, FALSE, &nmarks, flags); 1864 if (error) { 1865 aprint_error_dev(st->sc_dev, 1866 "failed to write closing filemarks at " 1867 "rewind, errno=%d\n", error); 1868 return error; 1869 } 1870 st->flags &= ~ST_PER_ACTION; 1871 1872 /* If requestor asked for immediate response, set a short timeout */ 1873 timeout = immediate ? ST_CTL_TIME : ST_SPC_TIME; 1874 1875 /* ATAPI tapes always need immediate to be set */ 1876 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1877 immediate = SR_IMMED; 1878 1879 memset(&cmd, 0, sizeof(cmd)); 1880 cmd.opcode = REWIND; 1881 cmd.byte2 = immediate; 1882 1883 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1884 ST_RETRIES, timeout, NULL, flags); 1885 if (error) { 1886 aprint_error_dev(st->sc_dev, "error %d trying to rewind\n", 1887 error); 1888 /* lost position */ 1889 st->fileno = st->blkno = -1; 1890 } else 1891 st->fileno = st->blkno = 0; 1892 return error; 1893 } 1894 1895 static int 1896 st_rdpos(struct st_softc *st, int hard, uint32_t *blkptr) 1897 { 1898 int error; 1899 uint8_t posdata[20]; 1900 struct scsi_tape_read_position cmd; 1901 1902 /* 1903 * We try and flush any buffered writes here if we were writing 1904 * and we're trying to get hardware block position. It eats 1905 * up performance substantially, but I'm wary of drive firmware. 1906 * 1907 * I think that *logical* block position is probably okay- 1908 * but hardware block position might have to wait for data 1909 * to hit media to be valid. Caveat Emptor. 1910 */ 1911 1912 if (hard && (st->flags & ST_WRITTEN)) { 1913 /* First flush any pending writes... */ 1914 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 1915 /* 1916 * The latter case is for 'write protected' tapes 1917 * which are too stupid to recognize a zero count 1918 * for writing filemarks as a no-op. 1919 */ 1920 if (error != 0 && error != EACCES && error != EROFS) 1921 return error; 1922 } 1923 1924 memset(&cmd, 0, sizeof(cmd)); 1925 memset(&posdata, 0, sizeof(posdata)); 1926 cmd.opcode = READ_POSITION; 1927 if (hard) 1928 cmd.byte1 = 1; 1929 1930 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 1931 (void *)&posdata, sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, 1932 XS_CTL_SILENT | XS_CTL_DATA_IN); 1933 1934 if (error == 0) { 1935 #if 0 1936 printf("posdata:"); 1937 for (hard = 0; hard < sizeof(posdata); hard++) 1938 printf("%02x ", posdata[hard] & 0xff); 1939 printf("\n"); 1940 #endif 1941 if (posdata[0] & 0x4) /* Block Position Unknown */ 1942 error = EINVAL; 1943 else 1944 *blkptr = _4btol(&posdata[4]); 1945 } 1946 return error; 1947 } 1948 1949 static int 1950 st_setpos(struct st_softc *st, int hard, uint32_t *blkptr) 1951 { 1952 int error; 1953 struct scsi_tape_locate cmd; 1954 1955 /* 1956 * We used to try and flush any buffered writes here. 1957 * Now we push this onto user applications to either 1958 * flush the pending writes themselves (via a zero count 1959 * WRITE FILEMARKS command) or they can trust their tape 1960 * drive to do this correctly for them. 1961 * 1962 * There are very ugly performance limitations otherwise. 1963 */ 1964 1965 memset(&cmd, 0, sizeof(cmd)); 1966 cmd.opcode = LOCATE; 1967 if (hard) 1968 cmd.byte2 = 1 << 2; 1969 _lto4b(*blkptr, cmd.blkaddr); 1970 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1971 ST_RETRIES, ST_SPC_TIME, NULL, 0); 1972 /* 1973 * Note file && block number position now unknown (if 1974 * these things ever start being maintained in this driver) 1975 */ 1976 st->fileno = st->blkno = -1; 1977 return error; 1978 } 1979 1980 1981 /* 1982 * Look at the returned sense and act on the error and determine 1983 * the unix error number to pass back..., 0 (== report no error), 1984 * -1 = retry the operation, -2 continue error processing. 1985 */ 1986 static int 1987 st_interpret_sense(struct scsipi_xfer *xs) 1988 { 1989 struct scsipi_periph *periph = xs->xs_periph; 1990 struct scsi_sense_data *sense = &xs->sense.scsi_sense; 1991 struct buf *bp = xs->bp; 1992 struct st_softc *st = device_private(periph->periph_dev); 1993 int retval = EJUSTRETURN; 1994 int doprint = ((xs->xs_control & XS_CTL_SILENT) == 0); 1995 uint8_t key; 1996 int32_t info; 1997 1998 /* 1999 * If it isn't a extended or extended/deferred error, let 2000 * the generic code handle it. 2001 */ 2002 if (SSD_RCODE(sense->response_code) != SSD_RCODE_CURRENT && 2003 SSD_RCODE(sense->response_code) != SSD_RCODE_DEFERRED) 2004 return retval; 2005 2006 if (sense->response_code & SSD_RCODE_VALID) 2007 info = _4btol(sense->info); 2008 else 2009 info = (st->flags & ST_FIXEDBLOCKS) ? 2010 xs->datalen / st->blksize : xs->datalen; 2011 key = SSD_SENSE_KEY(sense->flags); 2012 st->mt_erreg = key; 2013 st->asc = sense->asc; 2014 st->ascq = sense->ascq; 2015 st->mt_resid = (short) info; 2016 2017 if (key == SKEY_NOT_READY && st->asc == 0x4 && st->ascq == 0x1) { 2018 /* Not Ready, Logical Unit Is in Process Of Becoming Ready */ 2019 if (!callout_pending(&periph->periph_callout)) 2020 scsipi_periph_freeze(periph, 1); 2021 callout_reset(&periph->periph_callout, 2022 hz, scsipi_periph_timed_thaw, periph); 2023 return ERESTART; 2024 } 2025 2026 /* If the device is not open yet, let generic handle */ 2027 if ((periph->periph_flags & PERIPH_OPEN) == 0) 2028 return retval; 2029 2030 xs->resid = info; 2031 if (st->flags & ST_FIXEDBLOCKS) { 2032 if (bp) { 2033 xs->resid *= st->blksize; 2034 st->last_io_resid = xs->resid; 2035 } else 2036 st->last_ctl_resid = xs->resid; 2037 if (key == SKEY_VOLUME_OVERFLOW) { 2038 st->flags |= ST_EIO_PENDING; 2039 if (bp) 2040 bp->b_resid = xs->resid; 2041 } else if (sense->flags & SSD_EOM) { 2042 if ((st->flags & ST_EARLYWARN) == 0) 2043 st->flags |= ST_EIO_PENDING; 2044 st->flags |= ST_EOM_PENDING; 2045 if (bp) { 2046 #if 0 2047 bp->b_resid = xs->resid; 2048 #else 2049 /* 2050 * Grotesque as it seems, the few times 2051 * I've actually seen a non-zero resid, 2052 * the tape drive actually lied and had 2053 * written all the data! 2054 */ 2055 bp->b_resid = 0; 2056 #endif 2057 } 2058 } 2059 if (sense->flags & SSD_FILEMARK) { 2060 st->flags |= ST_AT_FILEMARK; 2061 if (bp) 2062 bp->b_resid = xs->resid; 2063 if (st->fileno != (daddr_t) -1) { 2064 st->fileno++; 2065 st->blkno = 0; 2066 st->flags |= ST_POSUPDATED; 2067 } 2068 } 2069 if (sense->flags & SSD_ILI) { 2070 st->flags |= ST_EIO_PENDING; 2071 if (bp) 2072 bp->b_resid = xs->resid; 2073 if (sense->response_code & SSD_RCODE_VALID && 2074 (xs->xs_control & XS_CTL_SILENT) == 0) 2075 aprint_error_dev(st->sc_dev, 2076 "block wrong size, %d blocks residual\n", 2077 info); 2078 2079 /* 2080 * This quirk code helps the drive read 2081 * the first tape block, regardless of 2082 * format. That is required for these 2083 * drives to return proper MODE SENSE 2084 * information. 2085 */ 2086 if ((st->quirks & ST_Q_SENSE_HELP) && 2087 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 2088 st->blksize -= 512; 2089 else if ((st->flags & ST_POSUPDATED) == 0) { 2090 if (st->blkno != (daddr_t) -1) { 2091 st->blkno += 2092 (xs->datalen / st->blksize); 2093 st->flags |= ST_POSUPDATED; 2094 } 2095 } 2096 } 2097 /* 2098 * If data wanted and no data was transferred, do it immediately 2099 */ 2100 if (xs->datalen && xs->resid >= xs->datalen) { 2101 if (st->flags & ST_EIO_PENDING) 2102 return EIO; 2103 if (st->flags & ST_AT_FILEMARK) { 2104 if (bp) 2105 bp->b_resid = xs->resid; 2106 return 0; 2107 } 2108 } 2109 } else { /* must be variable mode */ 2110 if (bp) 2111 st->last_io_resid = xs->resid; 2112 else 2113 st->last_ctl_resid = xs->resid; 2114 if (sense->flags & SSD_EOM) { 2115 /* 2116 * The current semantics of this 2117 * driver requires EOM detection 2118 * to return EIO unless early 2119 * warning detection is enabled 2120 * for variable mode (this is always 2121 * on for fixed block mode). 2122 */ 2123 if (st->flags & ST_EARLYWARN) { 2124 st->flags |= ST_EOM_PENDING; 2125 retval = 0; 2126 } else { 2127 retval = EIO; 2128 /* 2129 * If we return an error we can't claim to 2130 * have transfered all data. 2131 */ 2132 if (xs->resid == 0) 2133 xs->resid = xs->datalen; 2134 } 2135 2136 /* 2137 * If it's an unadorned EOM detection, 2138 * suppress printing an error. 2139 */ 2140 if (key == SKEY_NO_SENSE) { 2141 doprint = 0; 2142 } 2143 } else if (sense->flags & SSD_FILEMARK) { 2144 retval = 0; 2145 if (st->fileno != (daddr_t) -1) { 2146 st->fileno++; 2147 st->blkno = 0; 2148 st->flags |= ST_POSUPDATED; 2149 } 2150 } else if (sense->flags & SSD_ILI) { 2151 if (info < 0) { 2152 /* 2153 * The tape record was bigger than the read 2154 * we issued. 2155 */ 2156 if ((xs->xs_control & XS_CTL_SILENT) == 0) { 2157 aprint_error_dev(st->sc_dev, 2158 "%d-byte tape record too big" 2159 " for %d-byte user buffer\n", 2160 xs->datalen - info, xs->datalen); 2161 } 2162 retval = EIO; 2163 } else { 2164 retval = 0; 2165 if (st->blkno != (daddr_t) -1) { 2166 st->blkno++; 2167 st->flags |= ST_POSUPDATED; 2168 } 2169 } 2170 } 2171 if (bp) 2172 bp->b_resid = xs->resid; 2173 } 2174 2175 #ifndef SCSIPI_DEBUG 2176 if (retval == 0 && key == SKEY_NO_SENSE) 2177 doprint = 0; 2178 #endif 2179 if (key == SKEY_BLANK_CHECK) { 2180 /* 2181 * This quirk code helps the drive read the 2182 * first tape block, regardless of format. That 2183 * is required for these drives to return proper 2184 * MODE SENSE information. 2185 */ 2186 if ((st->quirks & ST_Q_SENSE_HELP) && 2187 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 2188 /* still starting */ 2189 st->blksize -= 512; 2190 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 2191 st->flags |= ST_BLANK_READ; 2192 xs->resid = xs->datalen; 2193 if (bp) { 2194 bp->b_resid = xs->resid; 2195 /* return an EOF */ 2196 } 2197 retval = 0; 2198 /* lost position */ 2199 st->fileno = st->blkno = -1; 2200 } 2201 } 2202 2203 /* 2204 * If generic sense processing will continue, we should not 2205 * print sense info here. 2206 */ 2207 if (retval == EJUSTRETURN) 2208 doprint = 0; 2209 2210 if (doprint) { 2211 /* Print verbose sense info if possible */ 2212 if (scsipi_print_sense(xs, 0) != 0) 2213 return retval; 2214 2215 /* Print less-verbose sense info */ 2216 scsipi_printaddr(periph); 2217 printf("Sense Key 0x%02x", key); 2218 if ((sense->response_code & SSD_RCODE_VALID) != 0) { 2219 switch (key) { 2220 case SKEY_NOT_READY: 2221 case SKEY_ILLEGAL_REQUEST: 2222 case SKEY_UNIT_ATTENTION: 2223 case SKEY_DATA_PROTECT: 2224 break; 2225 case SKEY_VOLUME_OVERFLOW: 2226 case SKEY_BLANK_CHECK: 2227 printf(", requested size: %d (decimal)", info); 2228 break; 2229 case SKEY_ABORTED_COMMAND: 2230 if (xs->xs_retries) 2231 printf(", retrying"); 2232 printf(", cmd 0x%x, info 0x%x", 2233 xs->cmd->opcode, info); 2234 break; 2235 default: 2236 printf(", info = %d (decimal)", info); 2237 } 2238 } 2239 if (sense->extra_len != 0) { 2240 int n; 2241 printf(", data ="); 2242 for (n = 0; n < sense->extra_len; n++) 2243 printf(" %02x", sense->csi[n]); 2244 } 2245 printf("\n"); 2246 } 2247 return retval; 2248 } 2249 2250 /* 2251 * The quirk here is that the drive returns some value to st_mode_sense 2252 * incorrectly until the tape has actually passed by the head. 2253 * 2254 * The method is to set the drive to large fixed-block state (user-specified 2255 * density and 1024-byte blocks), then read and rewind to get it to sense the 2256 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 2257 * work, as a last resort, try variable- length blocks. The result will be 2258 * the ability to do an accurate st_mode_sense. 2259 * 2260 * We know we can do a rewind because we just did a load, which implies rewind. 2261 * Rewind seems preferable to space backward if we have a virgin tape. 2262 * 2263 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 2264 * error processing, both part of st_interpret_sense. 2265 */ 2266 static int 2267 st_touch_tape(struct st_softc *st) 2268 { 2269 char *bf; 2270 int readsize; 2271 int error; 2272 2273 bf = malloc(1024, M_TEMP, M_NOWAIT); 2274 if (bf == NULL) 2275 return ENOMEM; 2276 2277 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 2278 goto bad; 2279 2280 /* 2281 * If the block size is already known from the 2282 * sense data, use it. Else start probing at 1024. 2283 */ 2284 if (st->media_blksize > 0) 2285 st->blksize = st->media_blksize; 2286 else 2287 st->blksize = 1024; 2288 2289 do { 2290 switch (st->blksize) { 2291 case 512: 2292 case 1024: 2293 readsize = st->blksize; 2294 st->flags |= ST_FIXEDBLOCKS; 2295 break; 2296 default: 2297 readsize = 1; 2298 st->flags &= ~ST_FIXEDBLOCKS; 2299 } 2300 if ((error = st->ops(st, ST_OPS_MODESELECT, XS_CTL_SILENT)) 2301 != 0) { 2302 /* 2303 * The device did not agree with the proposed 2304 * block size. If we exhausted our options, 2305 * return failure, else try another. 2306 */ 2307 if (readsize == 1) 2308 goto bad; 2309 st->blksize -= 512; 2310 continue; 2311 } 2312 st_read(st, bf, readsize, XS_CTL_SILENT); /* XXX */ 2313 if ((error = st_rewind(st, 0, 0)) != 0) { 2314 bad: free(bf, M_TEMP); 2315 return error; 2316 } 2317 } while (readsize != 1 && readsize > st->blksize); 2318 2319 free(bf, M_TEMP); 2320 return 0; 2321 } 2322 2323 static int 2324 stdump(dev_t dev, daddr_t blkno, void *va, size_t size) 2325 { 2326 /* Not implemented. */ 2327 return ENXIO; 2328 } 2329 2330 /* 2331 * Send a filled out parameter structure to the drive to 2332 * set it into the desire modes etc. 2333 */ 2334 int 2335 st_mode_select(struct st_softc *st, int flags) 2336 { 2337 u_int select_len; 2338 struct select { 2339 struct scsi_mode_parameter_header_6 header; 2340 struct scsi_general_block_descriptor blk_desc; 2341 u_char sense_data[MAX_PAGE_0_SIZE]; 2342 } select; 2343 struct scsipi_periph *periph = st->sc_periph; 2344 2345 select_len = sizeof(select.header) + sizeof(select.blk_desc) + 2346 st->page_0_size; 2347 2348 /* 2349 * This quirk deals with drives that have only one valid mode 2350 * and think this gives them license to reject all mode selects, 2351 * even if the selected mode is the one that is supported. 2352 */ 2353 if (st->quirks & ST_Q_UNIMODAL) { 2354 SC_DEBUG(periph, SCSIPI_DB3, 2355 ("not setting density 0x%x blksize 0x%x\n", 2356 st->density, st->blksize)); 2357 return 0; 2358 } 2359 2360 /* Set up for a mode select */ 2361 memset(&select, 0, sizeof(select)); 2362 select.header.blk_desc_len = sizeof(struct 2363 scsi_general_block_descriptor); 2364 select.header.dev_spec &= ~SMH_DSP_BUFF_MODE; 2365 select.blk_desc.density = st->density; 2366 if (st->flags & ST_DONTBUFFER) 2367 select.header.dev_spec |= SMH_DSP_BUFF_MODE_OFF; 2368 else 2369 select.header.dev_spec |= SMH_DSP_BUFF_MODE_ON; 2370 if (st->flags & ST_FIXEDBLOCKS) 2371 _lto3b(st->blksize, select.blk_desc.blklen); 2372 if (st->page_0_size) 2373 memcpy(select.sense_data, st->sense_data, st->page_0_size); 2374 2375 /* do the command */ 2376 return scsipi_mode_select(periph, 0, &select.header, select_len, 2377 flags, ST_RETRIES, ST_CTL_TIME); 2378 } 2379
Indexes created Fri Sep 26 20:09:58 GMT 2025