st.c revision 1.237
1 /* $NetBSD: st.c,v 1.237 2019/02/23 11:57:41 kamil 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 1.237 2019/02/23 11:57:41 kamil 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 int ststart1(struct scsipi_periph *, struct buf *); 347 static void strestart(void *); 348 static void stdone(struct scsipi_xfer *, int); 349 static int st_read(struct st_softc *, char *, int, int); 350 static int st_space(struct st_softc *, int, u_int, int); 351 static int st_write_filemarks(struct st_softc *, int, int); 352 static int st_check_eod(struct st_softc *, boolean, int *, int); 353 static int st_load(struct st_softc *, u_int, int); 354 static int st_rewind(struct st_softc *, u_int, int); 355 static int st_interpret_sense(struct scsipi_xfer *); 356 static int st_touch_tape(struct st_softc *); 357 static int st_erase(struct st_softc *, int full, int flags); 358 static int st_rdpos(struct st_softc *, int, uint32_t *); 359 static int st_setpos(struct st_softc *, int, uint32_t *); 360 361 static const struct scsipi_periphsw st_switch = { 362 st_interpret_sense, 363 ststart, 364 NULL, 365 stdone 366 }; 367 368 #if defined(ST_ENABLE_EARLYWARN) 369 #define ST_INIT_FLAGS ST_EARLYWARN 370 #else 371 #define ST_INIT_FLAGS 0 372 #endif 373 374 /* 375 * The routine called by the low level scsi routine when it discovers 376 * A device suitable for this driver 377 */ 378 void 379 stattach(device_t parent, device_t self, void *aux) 380 { 381 struct st_softc *st = device_private(self); 382 struct scsipibus_attach_args *sa = aux; 383 struct scsipi_periph *periph = sa->sa_periph; 384 385 SC_DEBUG(periph, SCSIPI_DB2, ("stattach: ")); 386 st->sc_dev = self; 387 388 /* Store information needed to contact our base driver */ 389 st->sc_periph = periph; 390 periph->periph_dev = st->sc_dev; 391 periph->periph_switch = &st_switch; 392 393 /* Set initial flags */ 394 st->flags = ST_INIT_FLAGS; 395 396 /* Set up the buf queues for this device */ 397 bufq_alloc(&st->buf_queue, "fcfs", 0); 398 bufq_alloc(&st->buf_defer, "fcfs", 0); 399 callout_init(&st->sc_callout, 0); 400 mutex_init(&st->sc_iolock, MUTEX_DEFAULT, IPL_VM); 401 402 /* 403 * Check if the drive is a known criminal and take 404 * Any steps needed to bring it into line 405 */ 406 st_identify_drive(st, &sa->sa_inqbuf); 407 aprint_naive("\n"); 408 aprint_normal("\n"); 409 /* Use the subdriver to request information regarding the drive. */ 410 aprint_normal_dev(self, "%s", st->quirkdata ? "quirks apply, " : ""); 411 if (scsipi_test_unit_ready(periph, 412 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE) || 413 st->ops(st, ST_OPS_MODESENSE, 414 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE)) 415 aprint_normal("drive empty\n"); 416 else { 417 aprint_normal("density code %d, ", st->media_density); 418 if (st->media_blksize > 0) 419 aprint_normal("%d-byte", st->media_blksize); 420 else 421 aprint_normal("variable"); 422 aprint_normal(" blocks, write-%s\n", 423 (st->flags & ST_READONLY) ? "protected" : "enabled"); 424 } 425 426 st->stats = iostat_alloc(IOSTAT_TAPE, parent, 427 device_xname(st->sc_dev)); 428 429 rnd_attach_source(&st->rnd_source, device_xname(st->sc_dev), 430 RND_TYPE_TAPE, RND_FLAG_DEFAULT); 431 } 432 433 int 434 stdetach(device_t self, int flags) 435 { 436 struct st_softc *st = device_private(self); 437 struct scsipi_periph *periph = st->sc_periph; 438 struct scsipi_channel *chan = periph->periph_channel; 439 int bmaj, cmaj, mn; 440 441 /* locate the major number */ 442 bmaj = bdevsw_lookup_major(&st_bdevsw); 443 cmaj = cdevsw_lookup_major(&st_cdevsw); 444 445 /* kill any pending restart */ 446 callout_halt(&st->sc_callout, NULL); 447 448 mutex_enter(chan_mtx(chan)); 449 450 /* Kill off any queued buffers. */ 451 bufq_drain(st->buf_defer); 452 bufq_drain(st->buf_queue); 453 454 /* Kill off any pending commands. */ 455 scsipi_kill_pending(st->sc_periph); 456 457 mutex_exit(chan_mtx(chan)); 458 459 bufq_free(st->buf_defer); 460 bufq_free(st->buf_queue); 461 mutex_destroy(&st->sc_iolock); 462 463 /* Nuke the vnodes for any open instances */ 464 mn = STUNIT(device_unit(self)); 465 vdevgone(bmaj, mn, mn+STNMINOR-1, VBLK); 466 vdevgone(cmaj, mn, mn+STNMINOR-1, VCHR); 467 468 iostat_free(st->stats); 469 470 /* Unhook the entropy source. */ 471 rnd_detach_source(&st->rnd_source); 472 473 return 0; 474 } 475 476 /* 477 * Use the inquiry routine in 'scsi_base' to get drive info so we can 478 * Further tailor our behaviour. 479 */ 480 static void 481 st_identify_drive(struct st_softc *st, struct scsipi_inquiry_pattern *inqbuf) 482 { 483 const struct st_quirk_inquiry_pattern *finger; 484 int priority; 485 486 finger = scsipi_inqmatch(inqbuf, 487 st_quirk_patterns, 488 sizeof(st_quirk_patterns) / sizeof(st_quirk_patterns[0]), 489 sizeof(st_quirk_patterns[0]), &priority); 490 if (priority != 0) { 491 st->quirkdata = &finger->quirkdata; 492 st->drive_quirks = finger->quirkdata.quirks; 493 st->quirks = finger->quirkdata.quirks; /* start value */ 494 st->page_0_size = finger->quirkdata.page_0_size; 495 KASSERT(st->page_0_size <= MAX_PAGE_0_SIZE); 496 st_loadquirks(st); 497 } 498 } 499 500 /* 501 * initialise the subdevices to the default (QUIRK) state. 502 * this will remove any setting made by the system operator or previous 503 * operations. 504 */ 505 static void 506 st_loadquirks(struct st_softc *st) 507 { 508 const struct modes *mode; 509 struct modes *mode2; 510 int i; 511 512 mode = st->quirkdata->modes; 513 mode2 = st->modes; 514 for (i = 0; i < 4; i++) { 515 memset(mode2, 0, sizeof(struct modes)); 516 st->modeflags[i] &= ~(BLKSIZE_SET_BY_QUIRK | 517 DENSITY_SET_BY_QUIRK | BLKSIZE_SET_BY_USER | 518 DENSITY_SET_BY_USER); 519 if ((mode->quirks | st->drive_quirks) & ST_Q_FORCE_BLKSIZE) { 520 mode2->blksize = mode->blksize; 521 st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; 522 } 523 if (mode->density) { 524 mode2->density = mode->density; 525 st->modeflags[i] |= DENSITY_SET_BY_QUIRK; 526 } 527 mode2->quirks |= mode->quirks; 528 mode++; 529 mode2++; 530 } 531 } 532 533 /* open the device. */ 534 static int 535 stopen(dev_t dev, int flags, int mode, struct lwp *l) 536 { 537 u_int stmode, dsty; 538 int error, sflags, unit, tries, ntries; 539 struct st_softc *st; 540 struct scsipi_periph *periph; 541 struct scsipi_adapter *adapt; 542 543 unit = STUNIT(dev); 544 st = device_lookup_private(&st_cd, unit); 545 if (st == NULL) 546 return ENXIO; 547 548 stmode = STMODE(dev); 549 dsty = STDSTY(dev); 550 551 periph = st->sc_periph; 552 adapt = periph->periph_channel->chan_adapter; 553 554 SC_DEBUG(periph, SCSIPI_DB1, 555 ("open: dev=0x%"PRIx64" (unit %d (of %d))\n", dev, unit, 556 st_cd.cd_ndevs)); 557 558 /* Only allow one at a time */ 559 if (periph->periph_flags & PERIPH_OPEN) { 560 aprint_error_dev(st->sc_dev, "already open\n"); 561 return EBUSY; 562 } 563 564 if ((error = scsipi_adapter_addref(adapt)) != 0) 565 return error; 566 567 /* clear any latched errors. */ 568 st->mt_resid = 0; 569 st->mt_erreg = 0; 570 st->asc = 0; 571 st->ascq = 0; 572 573 /* 574 * Catch any unit attention errors. Be silent about this 575 * unless we're already mounted. We ignore media change 576 * if we're in control mode or not mounted yet. 577 */ 578 if ((st->flags & ST_MOUNTED) == 0 || stmode == CTRL_MODE) { 579 #ifdef SCSIDEBUG 580 sflags = XS_CTL_IGNORE_MEDIA_CHANGE; 581 #else 582 sflags = XS_CTL_SILENT|XS_CTL_IGNORE_MEDIA_CHANGE; 583 #endif 584 } else 585 sflags = 0; 586 587 /* 588 * If we're already mounted or we aren't configured for 589 * a mount delay, only try a test unit ready once. Otherwise, 590 * try up to ST_MOUNT_DELAY times with a rest interval of 591 * one second between each try. 592 */ 593 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0) 594 ntries = 1; 595 else 596 ntries = ST_MOUNT_DELAY; 597 598 for (error = tries = 0; tries < ntries; tries++) { 599 int slpintr, oflags; 600 601 /* 602 * If we had no error, or we're opening the control mode 603 * device, we jump out right away. 604 */ 605 error = scsipi_test_unit_ready(periph, sflags); 606 if (error == 0 || stmode == CTRL_MODE) 607 break; 608 609 /* 610 * We had an error. 611 * 612 * If we're already mounted or we aren't configured for 613 * a mount delay, or the error isn't a NOT READY error, 614 * skip to the error exit now. 615 */ 616 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0 || 617 (st->mt_key != SKEY_NOT_READY)) { 618 device_printf(st->sc_dev, 619 "mount error (sense key=%d) - " 620 "terminating mount session\n", 621 st->mt_key); 622 /* 623 * the following should not trigger unless 624 * something serious happened while the device 625 * was open (PREVENT MEDIUM REMOVAL in effect) 626 */ 627 if (st->flags & ST_WRITTEN && 628 st->mt_key == SKEY_UNIT_ATTENTION) { 629 /* 630 * device / media state may have changed 631 * refrain from writing missing file marks 632 * onto potentially newly inserted/formatted 633 * media (e. g. emergency EJECT/RESET/etc.) 634 */ 635 st->flags &= ~(ST_WRITTEN|ST_FM_WRITTEN); 636 637 device_printf(st->sc_dev, 638 "CAUTION: file marks/data may be missing" 639 " - ASC = 0x%02x, ASCQ = 0x%02x\n", 640 st->asc, st->ascq); 641 } 642 goto bad; 643 } 644 645 /* clear any latched errors. */ 646 st->mt_resid = 0; 647 st->mt_erreg = 0; 648 st->asc = 0; 649 st->ascq = 0; 650 651 /* 652 * Fake that we have the device open so 653 * we block other apps from getting in. 654 */ 655 oflags = periph->periph_flags; 656 periph->periph_flags |= PERIPH_OPEN; 657 658 slpintr = kpause("stload", true, hz, NULL); 659 660 periph->periph_flags = oflags; /* restore flags */ 661 if (slpintr != 0 && slpintr != EWOULDBLOCK) { 662 device_printf(st->sc_dev, "load interrupted\n"); 663 goto bad; 664 } 665 } 666 667 /* 668 * If the mode is 3 (e.g. minor = 3,7,11,15) then the device has 669 * been opened to set defaults and perform other, usually non-I/O 670 * related, operations. In this case, do a quick check to see 671 * whether the unit actually had a tape loaded (this will be known 672 * as to whether or not we got a NOT READY for the above 673 * unit attention). If a tape is there, go do a mount sequence. 674 */ 675 if (stmode == CTRL_MODE && 676 st->mt_key != SKEY_NO_SENSE && 677 st->mt_key != SKEY_UNIT_ATTENTION) { 678 periph->periph_flags |= PERIPH_OPEN; 679 return 0; 680 } 681 682 /* 683 * If we get this far and had an error set, that means we failed 684 * to pass the 'test unit ready' test for the non-controlmode device, 685 * so we bounce the open. 686 */ 687 if (error) 688 return error; 689 690 /* Else, we're now committed to saying we're open. */ 691 periph->periph_flags |= PERIPH_OPEN; /* unit attn are now errors */ 692 693 /* 694 * If it's a different mode, or if the media has been 695 * invalidated, unmount the tape from the previous 696 * session but continue with open processing 697 */ 698 if (st->last_dsty != dsty || 699 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 700 st_unmount(st, NOEJECT); 701 702 /* 703 * If we are not mounted, then we should start a new 704 * mount session. 705 */ 706 if (!(st->flags & ST_MOUNTED)) { 707 if ((error = st_mount_tape(dev, flags)) != 0) 708 goto bad; 709 st->last_dsty = dsty; 710 } 711 if (!(st->quirks & ST_Q_NOPREVENT)) { 712 scsipi_prevent(periph, SPAMR_PREVENT_DT, 713 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 714 } 715 716 SC_DEBUG(periph, SCSIPI_DB2, ("open complete\n")); 717 return 0; 718 719 bad: 720 st_unmount(st, NOEJECT); 721 scsipi_adapter_delref(adapt); 722 periph->periph_flags &= ~PERIPH_OPEN; 723 return error; 724 } 725 726 static int 727 stclose(dev_t dev, int flags, int mode, struct lwp *l) 728 { 729 int stxx, error = 0; 730 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(dev)); 731 struct scsipi_periph *periph = st->sc_periph; 732 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 733 734 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("closing\n")); 735 736 /* 737 * Make sure that a tape opened in write-only mode will have 738 * file marks written on it when closed, even if not written to. 739 * 740 * This is for SUN compatibility. Actually, the Sun way of 741 * things is to: 742 * 743 * only write filemarks if there are fmks to be written and 744 * - open for write (possibly read/write) 745 * - the last operation was a write 746 * or: 747 * - opened for wronly 748 * - no data was written (including filemarks) 749 */ 750 751 stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); 752 if ((flags & FWRITE) != 0) { 753 int nm = 0; 754 #ifdef ST_SUNCOMPAT 755 /* 756 * on request only 757 * original compat code has not been working 758 * since ~1998 759 */ 760 if ((flags & O_ACCMODE) == FWRITE && (stxx == 0)) { 761 st->flags |= ST_WRITTEN; 762 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 763 ("SUN compatibility: write FM(s) at close\n")); 764 } 765 #endif 766 error = st_check_eod(st, FALSE, &nm, 0); 767 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 768 ("wrote %d FM(s) at close error=%d\n", nm, error)); 769 } 770 771 /* Allow robots to eject tape if needed. */ 772 if (!(st->quirks & ST_Q_NOPREVENT)) { 773 scsipi_prevent(periph, SPAMR_ALLOW, 774 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 775 } 776 777 switch (STMODE(dev)) { 778 case NORMAL_MODE: 779 st_unmount(st, NOEJECT); 780 break; 781 case NOREW_MODE: 782 case CTRL_MODE: 783 /* 784 * Leave mounted unless media seems to have been removed. 785 * 786 * Otherwise, if we're to terminate a tape with more than one 787 * filemark [ and because we're not rewinding here ], backspace 788 * one filemark so that later appends will see an unbroken 789 * sequence of: 790 * 791 * file - FMK - file - FMK ... file - FMK FMK (EOM) 792 */ 793 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 794 st_unmount(st, NOEJECT); 795 } else if (error == 0) { 796 /* 797 * ST_WRITTEN was preserved from above. 798 * 799 * All we need to know here is: 800 * 801 * Were we writing this tape and was the last 802 * operation a write? 803 * 804 * Are there supposed to be 2FM at EOD? 805 * 806 * If both statements are true, then we backspace 807 * one filemark. 808 */ 809 stxx &= ~ST_FM_WRITTEN; 810 stxx |= (st->flags & ST_2FM_AT_EOD); 811 if ((flags & FWRITE) != 0 && 812 (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { 813 error = st_space(st, -1, SP_FILEMARKS, 0); 814 SC_DEBUG(st->sc_periph, SCSIPI_DB3, ("st_space(-1) error=%d\n", error)); 815 } else { 816 SC_DEBUG(st->sc_periph, SCSIPI_DB3, ("no backspacing - flags = 0x%x, stxx=0x%x, st->flags=0x%x\n", flags, stxx, st->flags)); 817 } 818 } else { 819 SC_DEBUG(st->sc_periph, SCSIPI_DB3, ("error %d from st_check_eod\n", error)); 820 } 821 822 break; 823 case EJECT_MODE: 824 st_unmount(st, EJECT); 825 break; 826 } 827 828 KASSERTMSG((st->flags & ST_WRITTEN) == 0, 829 "pending ST_WRITTEN flag NOT cleared (flags=0x%x)", st->flags); 830 831 scsipi_wait_drain(periph); 832 833 scsipi_adapter_delref(adapt); 834 periph->periph_flags &= ~PERIPH_OPEN; 835 836 return error; 837 } 838 839 /* 840 * Start a new mount session. 841 * Copy in all the default parameters from the selected device mode. 842 * and try guess any that seem to be defaulted. 843 */ 844 static int 845 st_mount_tape(dev_t dev, int flags) 846 { 847 int unit; 848 u_int dsty; 849 struct st_softc *st; 850 struct scsipi_periph *periph; 851 int error = 0; 852 853 unit = STUNIT(dev); 854 dsty = STDSTY(dev); 855 st = device_lookup_private(&st_cd, unit); 856 periph = st->sc_periph; 857 858 if (st->flags & ST_MOUNTED) 859 return 0; 860 861 SC_DEBUG(periph, SCSIPI_DB1, ("mounting\n ")); 862 st->flags |= ST_NEW_MOUNT; 863 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 864 /* 865 * If the media is new, then make sure we give it a chance to 866 * to do a 'load' instruction. (We assume it is new.) 867 */ 868 if ((error = st_load(st, LD_LOAD, XS_CTL_SILENT)) != 0) 869 return error; 870 /* 871 * Throw another dummy instruction to catch 872 * 'Unit attention' errors. Many drives give 873 * these after doing a Load instruction (with 874 * the MEDIUM MAY HAVE CHANGED asc/ascq). 875 */ 876 scsipi_test_unit_ready(periph, XS_CTL_SILENT); /* XXX */ 877 878 /* 879 * Some devices can't tell you much until they have been 880 * asked to look at the media. This quirk does this. 881 */ 882 if (st->quirks & ST_Q_SENSE_HELP) 883 if ((error = st_touch_tape(st)) != 0) 884 return error; 885 /* 886 * Load the physical device parameters 887 * loads: blkmin, blkmax 888 */ 889 if ((error = st->ops(st, ST_OPS_RBL, 0)) != 0) 890 return error; 891 /* 892 * Load the media dependent parameters 893 * includes: media_blksize,media_density,numblks 894 * As we have a tape in, it should be reflected here. 895 * If not you may need the "quirk" above. 896 */ 897 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 898 return error; 899 /* 900 * If we have gained a permanent density from somewhere, 901 * then use it in preference to the one supplied by 902 * default by the driver. 903 */ 904 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 905 st->density = st->modes[dsty].density; 906 else 907 st->density = st->media_density; 908 /* 909 * If we have gained a permanent blocksize 910 * then use it in preference to the one supplied by 911 * default by the driver. 912 */ 913 st->flags &= ~ST_FIXEDBLOCKS; 914 if (st->modeflags[dsty] & 915 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 916 st->blksize = st->modes[dsty].blksize; 917 if (st->blksize) 918 st->flags |= ST_FIXEDBLOCKS; 919 } else { 920 if ((error = st_decide_mode(st, FALSE)) != 0) 921 return error; 922 } 923 if ((error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 924 /* ATAPI will return ENODEV for this, and this may be OK */ 925 if (error != ENODEV) { 926 aprint_error_dev(st->sc_dev, 927 "cannot set selected mode\n"); 928 return error; 929 } 930 } 931 st->flags &= ~ST_NEW_MOUNT; 932 st->flags |= ST_MOUNTED; 933 periph->periph_flags |= PERIPH_MEDIA_LOADED; /* move earlier? */ 934 st->blkno = st->fileno = (daddr_t) 0; 935 return 0; 936 } 937 938 /* 939 * End the present mount session. 940 * Rewind, and optionally eject the tape. 941 * Reset various flags to indicate that all new 942 * operations require another mount operation 943 */ 944 static void 945 st_unmount(struct st_softc *st, boolean eject) 946 { 947 struct scsipi_periph *periph = st->sc_periph; 948 int nmarks; 949 950 if ((st->flags & ST_MOUNTED) == 0) 951 return; 952 SC_DEBUG(periph, SCSIPI_DB1, ("unmounting\n")); 953 st_check_eod(st, FALSE, &nmarks, XS_CTL_IGNORE_NOT_READY); 954 st_rewind(st, 0, XS_CTL_IGNORE_NOT_READY); 955 956 /* 957 * Section 9.3.3 of the SCSI specs states that a device shall return 958 * the density value specified in the last successful MODE SELECT 959 * after an unload operation, in case it is not able to 960 * automatically determine the density of the new medium. 961 * 962 * So we instruct the device to use the default density, which will 963 * prevent the use of stale density values (in particular, 964 * in st_touch_tape(). 965 */ 966 st->density = 0; 967 if (st->ops(st, ST_OPS_MODESELECT, 0) != 0) { 968 aprint_error_dev(st->sc_dev, 969 "WARNING: cannot revert to default density\n"); 970 } 971 972 if (eject) { 973 if (!(st->quirks & ST_Q_NOPREVENT)) { 974 scsipi_prevent(periph, SPAMR_ALLOW, 975 XS_CTL_IGNORE_ILLEGAL_REQUEST | 976 XS_CTL_IGNORE_NOT_READY); 977 } 978 st_load(st, LD_UNLOAD, XS_CTL_IGNORE_NOT_READY); 979 st->blkno = st->fileno = (daddr_t) -1; 980 } else { 981 st->blkno = st->fileno = (daddr_t) 0; 982 } 983 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 984 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 985 } 986 987 /* 988 * Given all we know about the device, media, mode, 'quirks' and 989 * initial operation, make a decision as to how we should be set 990 * to run (regarding blocking and EOD marks) 991 */ 992 int 993 st_decide_mode(struct st_softc *st, boolean first_read) 994 { 995 996 SC_DEBUG(st->sc_periph, SCSIPI_DB2, ("starting block mode decision\n")); 997 998 /* 999 * If the drive can only handle fixed-length blocks and only at 1000 * one size, perhaps we should just do that. 1001 */ 1002 if (st->blkmin && (st->blkmin == st->blkmax)) { 1003 st->flags |= ST_FIXEDBLOCKS; 1004 st->blksize = st->blkmin; 1005 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1006 ("blkmin == blkmax of %d\n", st->blkmin)); 1007 goto done; 1008 } 1009 /* 1010 * If the tape density mandates (or even suggests) use of fixed 1011 * or variable-length blocks, comply. 1012 */ 1013 switch (st->density) { 1014 case HALFINCH_800: 1015 case HALFINCH_1600: 1016 case HALFINCH_6250: 1017 case DDS: 1018 st->flags &= ~ST_FIXEDBLOCKS; 1019 st->blksize = 0; 1020 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1021 ("density specified variable\n")); 1022 goto done; 1023 case QIC_11: 1024 case QIC_24: 1025 case QIC_120: 1026 case QIC_150: 1027 case QIC_525: 1028 case QIC_1320: 1029 case QIC_3095: 1030 case QIC_3220: 1031 st->flags |= ST_FIXEDBLOCKS; 1032 if (st->media_blksize > 0) 1033 st->blksize = st->media_blksize; 1034 else 1035 st->blksize = DEF_FIXED_BSIZE; 1036 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1037 ("density specified fixed\n")); 1038 goto done; 1039 } 1040 /* 1041 * If we're about to read the tape, perhaps we should choose 1042 * fixed or variable-length blocks and block size according to 1043 * what the drive found on the tape. 1044 */ 1045 if (first_read && 1046 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 1047 (st->media_blksize == DEF_FIXED_BSIZE) || 1048 (st->media_blksize == 1024))) { 1049 if (st->media_blksize > 0) 1050 st->flags |= ST_FIXEDBLOCKS; 1051 else 1052 st->flags &= ~ST_FIXEDBLOCKS; 1053 st->blksize = st->media_blksize; 1054 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1055 ("Used media_blksize of %d\n", st->media_blksize)); 1056 goto done; 1057 } 1058 /* 1059 * We're getting no hints from any direction. Choose variable- 1060 * length blocks arbitrarily. 1061 */ 1062 st->flags &= ~ST_FIXEDBLOCKS; 1063 st->blksize = 0; 1064 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1065 ("Give up and default to variable mode\n")); 1066 1067 done: 1068 /* 1069 * Decide whether or not to write two file marks to signify end- 1070 * of-data. Make the decision as a function of density. If 1071 * the decision is not to use a second file mark, the SCSI BLANK 1072 * CHECK condition code will be recognized as end-of-data when 1073 * first read. 1074 * (I think this should be a by-product of fixed/variable..julian) 1075 */ 1076 switch (st->density) { 1077 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 1078 case QIC_11: 1079 case QIC_24: 1080 case QIC_120: 1081 case QIC_150: 1082 case QIC_525: 1083 case QIC_1320: 1084 case QIC_3095: 1085 case QIC_3220: 1086 st->flags &= ~ST_2FM_AT_EOD; 1087 break; 1088 default: 1089 st->flags |= ST_2FM_AT_EOD; 1090 } 1091 return 0; 1092 } 1093 1094 /* 1095 * Actually translate the requested transfer into 1096 * one the physical driver can understand 1097 * The transfer is described by a buf and will include 1098 * only one physical transfer. 1099 */ 1100 static void 1101 ststrategy(struct buf *bp) 1102 { 1103 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(bp->b_dev)); 1104 struct scsipi_periph *periph = st->sc_periph; 1105 struct scsipi_channel *chan = periph->periph_channel; 1106 1107 SC_DEBUG(periph, SCSIPI_DB1, 1108 ("ststrategy %d bytes @ blk %" PRId64 "\n", bp->b_bcount, 1109 bp->b_blkno)); 1110 /* If it's a null transfer, return immediately */ 1111 if (bp->b_bcount == 0) 1112 goto abort; 1113 1114 /* If offset is negative, error */ 1115 if (bp->b_blkno < 0) { 1116 SC_DEBUG(periph, SCSIPI_DB3, 1117 ("EINVAL: ststrategy negative blockcount %" PRId64 "\n", bp->b_blkno)); 1118 bp->b_error = EINVAL; 1119 goto abort; 1120 } 1121 1122 /* Odd sized request on fixed drives are verboten */ 1123 if (st->flags & ST_FIXEDBLOCKS) { 1124 if (bp->b_bcount % st->blksize) { 1125 aprint_error_dev(st->sc_dev, "bad request, must be multiple of %d\n", 1126 st->blksize); 1127 bp->b_error = EIO; 1128 goto abort; 1129 } 1130 } 1131 /* as are out-of-range requests on variable drives. */ 1132 else if (bp->b_bcount < st->blkmin || 1133 (st->blkmax && bp->b_bcount > st->blkmax)) { 1134 aprint_error_dev(st->sc_dev, "bad request, must be between %d and %d\n", 1135 st->blkmin, st->blkmax); 1136 bp->b_error = EIO; 1137 goto abort; 1138 } 1139 mutex_enter(chan_mtx(chan)); 1140 1141 /* 1142 * Place it in the queue of activities for this tape 1143 * at the end (a bit silly because we only have on user.. 1144 * (but it could fork())) 1145 */ 1146 bufq_put(st->buf_queue, bp); 1147 1148 /* 1149 * Tell the device to get going on the transfer if it's 1150 * not doing anything, otherwise just wait for completion 1151 * (All a bit silly if we're only allowing 1 open but..) 1152 */ 1153 ststart(periph); 1154 1155 mutex_exit(chan_mtx(chan)); 1156 return; 1157 abort: 1158 /* 1159 * Reset the residue because we didn't do anything, 1160 * and send the buffer back as done. 1161 */ 1162 bp->b_resid = bp->b_bcount; 1163 biodone(bp); 1164 return; 1165 } 1166 1167 /* 1168 * ststart looks to see if there is a buf waiting for the device 1169 * and that the device is not already busy. If the device is busy, 1170 * the request is deferred and retried on the next attempt. 1171 * If both are true, ststart creates a scsi command to perform 1172 * the transfer required. 1173 * 1174 * The transfer request will call scsipi_done on completion, 1175 * which will in turn call this routine again so that the next 1176 * queued transfer is performed. The bufs are queued by the 1177 * strategy routine (ststrategy) 1178 * 1179 * This routine is also called after other non-queued requests 1180 * have been made of the scsi driver, to ensure that the queue 1181 * continues to be drained. 1182 * ststart() is called with channel lock held 1183 */ 1184 static int 1185 ststart1(struct scsipi_periph *periph, struct buf *bp) 1186 { 1187 struct st_softc *st = device_private(periph->periph_dev); 1188 struct scsipi_channel *chan = periph->periph_channel; 1189 struct scsi_rw_tape cmd; 1190 struct scsipi_xfer *xs; 1191 int flags, error; 1192 1193 SC_DEBUG(periph, SCSIPI_DB2, ("ststart1 ")); 1194 1195 mutex_enter(chan_mtx(chan)); 1196 1197 if (periph->periph_active >= periph->periph_openings) { 1198 error = EAGAIN; 1199 goto out; 1200 } 1201 1202 /* if a special awaits, let it proceed first */ 1203 if (periph->periph_flags & PERIPH_WAITING) { 1204 periph->periph_flags &= ~PERIPH_WAITING; 1205 cv_broadcast(periph_cv_periph(periph)); 1206 error = EAGAIN; 1207 goto out; 1208 } 1209 1210 /* 1211 * If the device has been unmounted by the user 1212 * then throw away all requests until done. 1213 */ 1214 if (__predict_false((st->flags & ST_MOUNTED) == 0 || 1215 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0)) { 1216 error = EIO; 1217 goto out; 1218 } 1219 1220 /* 1221 * only FIXEDBLOCK devices have pending I/O or space operations. 1222 */ 1223 if (st->flags & ST_FIXEDBLOCKS) { 1224 /* 1225 * If we are at a filemark but have not reported it yet 1226 * then we should report it now 1227 */ 1228 if (st->flags & ST_AT_FILEMARK) { 1229 if ((bp->b_flags & B_READ) == B_WRITE) { 1230 /* 1231 * Handling of ST_AT_FILEMARK in 1232 * st_space will fill in the right file 1233 * mark count. 1234 * Back up over filemark 1235 */ 1236 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1237 error = EIO; 1238 goto out; 1239 } 1240 } else { 1241 bp->b_resid = bp->b_bcount; 1242 error = 0; 1243 st->flags &= ~ST_AT_FILEMARK; 1244 goto out; 1245 } 1246 } 1247 } 1248 /* 1249 * If we are at EOM but have not reported it 1250 * yet then we should report it now. 1251 */ 1252 if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { 1253 error = EIO; 1254 goto out; 1255 } 1256 1257 /* Fill out the scsi command */ 1258 memset(&cmd, 0, sizeof(cmd)); 1259 flags = XS_CTL_NOSLEEP | XS_CTL_ASYNC; 1260 if ((bp->b_flags & B_READ) == B_WRITE) { 1261 cmd.opcode = WRITE; 1262 st->flags &= ~ST_FM_WRITTEN; 1263 flags |= XS_CTL_DATA_OUT; 1264 } else { 1265 cmd.opcode = READ; 1266 flags |= XS_CTL_DATA_IN; 1267 } 1268 1269 /* 1270 * Handle "fixed-block-mode" tape drives by using the 1271 * block count instead of the length. 1272 */ 1273 if (st->flags & ST_FIXEDBLOCKS) { 1274 cmd.byte2 |= SRW_FIXED; 1275 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1276 } else 1277 _lto3b(bp->b_bcount, cmd.len); 1278 1279 /* Clear 'position updated' indicator */ 1280 st->flags &= ~ST_POSUPDATED; 1281 1282 /* go ask the adapter to do all this for us */ 1283 xs = scsipi_make_xs_locked(periph, 1284 (struct scsipi_generic *)&cmd, sizeof(cmd), 1285 (u_char *)bp->b_data, bp->b_bcount, 1286 0, ST_IO_TIME, bp, flags); 1287 if (__predict_false(xs == NULL)) { 1288 /* 1289 * out of memory. Keep this buffer in the queue, and 1290 * retry later. 1291 */ 1292 callout_reset(&st->sc_callout, hz / 2, strestart, 1293 periph); 1294 error = EAGAIN; 1295 goto out; 1296 } 1297 1298 error = scsipi_execute_xs(xs); 1299 /* with a scsipi_xfer preallocated, scsipi_command can't fail */ 1300 KASSERT(error == 0); 1301 1302 out: 1303 mutex_exit(chan_mtx(chan)); 1304 1305 return error; 1306 } 1307 1308 static void 1309 ststart(struct scsipi_periph *periph) 1310 { 1311 struct st_softc *st = device_private(periph->periph_dev); 1312 struct scsipi_channel *chan = periph->periph_channel; 1313 struct buf *bp; 1314 int error; 1315 1316 SC_DEBUG(periph, SCSIPI_DB2, ("ststart ")); 1317 1318 mutex_exit(chan_mtx(chan)); 1319 mutex_enter(&st->sc_iolock); 1320 1321 while ((bp = bufq_get(st->buf_defer)) != NULL 1322 || (bp = bufq_get(st->buf_queue)) != NULL) { 1323 1324 iostat_busy(st->stats); 1325 mutex_exit(&st->sc_iolock); 1326 1327 error = ststart1(periph, bp); 1328 1329 mutex_enter(&st->sc_iolock); 1330 if (error != 0) 1331 iostat_unbusy(st->stats, 0, 1332 ((bp->b_flags & B_READ) == B_READ)); 1333 if (error == EAGAIN) { 1334 bufq_put(st->buf_defer, bp); 1335 break; 1336 } 1337 mutex_exit(&st->sc_iolock); 1338 1339 if (error != 0) { 1340 bp->b_error = error; 1341 bp->b_resid = bp->b_bcount; 1342 biodone(bp); 1343 } 1344 1345 mutex_enter(&st->sc_iolock); 1346 } 1347 1348 mutex_exit(&st->sc_iolock); 1349 mutex_enter(chan_mtx(chan)); 1350 } 1351 1352 static void 1353 strestart(void *v) 1354 { 1355 struct scsipi_periph *periph = (struct scsipi_periph *)v; 1356 struct scsipi_channel *chan = periph->periph_channel; 1357 1358 mutex_enter(chan_mtx(chan)); 1359 ststart((struct scsipi_periph *)v); 1360 mutex_exit(chan_mtx(chan)); 1361 } 1362 1363 static void 1364 stdone(struct scsipi_xfer *xs, int error) 1365 { 1366 struct st_softc *st = device_private(xs->xs_periph->periph_dev); 1367 struct buf *bp = xs->bp; 1368 1369 if (bp) { 1370 bp->b_error = error; 1371 bp->b_resid = xs->resid; 1372 /* 1373 * buggy device ? A SDLT320 can report an info 1374 * field of 0x3de8000 on a Media Error/Write Error 1375 * for this CBD: 0x0a 00 00 80 00 00 1376 */ 1377 if (bp->b_resid > bp->b_bcount || bp->b_resid < 0) 1378 bp->b_resid = bp->b_bcount; 1379 1380 mutex_enter(&st->sc_iolock); 1381 1382 if ((bp->b_flags & B_READ) == B_WRITE) 1383 st->flags |= ST_WRITTEN; 1384 else 1385 st->flags &= ~ST_WRITTEN; 1386 1387 iostat_unbusy(st->stats, bp->b_bcount, 1388 ((bp->b_flags & B_READ) == B_READ)); 1389 1390 if ((st->flags & ST_POSUPDATED) == 0) { 1391 if (error) { 1392 st->fileno = st->blkno = -1; 1393 } else if (st->blkno != -1) { 1394 if (st->flags & ST_FIXEDBLOCKS) 1395 st->blkno += 1396 (bp->b_bcount / st->blksize); 1397 else 1398 st->blkno++; 1399 } 1400 } 1401 1402 mutex_exit(&st->sc_iolock); 1403 1404 rnd_add_uint32(&st->rnd_source, bp->b_blkno); 1405 1406 biodone(bp); 1407 } 1408 } 1409 1410 static int 1411 stread(dev_t dev, struct uio *uio, int iomode) 1412 { 1413 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(dev)); 1414 1415 int r = physio(ststrategy, NULL, dev, B_READ, 1416 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio); 1417 1418 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("[stread: result=%d]\n", r)); 1419 1420 return r; 1421 } 1422 1423 static int 1424 stwrite(dev_t dev, struct uio *uio, int iomode) 1425 { 1426 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(dev)); 1427 1428 int r = physio(ststrategy, NULL, dev, B_WRITE, 1429 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio); 1430 1431 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("[stwrite: result=%d]\n", r)); 1432 1433 return r; 1434 } 1435 1436 /* 1437 * Perform special action on behalf of the user; 1438 * knows about the internals of this device 1439 */ 1440 static int 1441 stioctl(dev_t dev, u_long cmd, void *arg, int flag, struct lwp *l) 1442 { 1443 int error = 0; 1444 int unit; 1445 int number, nmarks, dsty; 1446 int flags; 1447 struct st_softc *st; 1448 int hold_blksize; 1449 uint8_t hold_density; 1450 struct mtop *mt = (struct mtop *) arg; 1451 1452 /* Find the device that the user is talking about */ 1453 flags = 0; /* give error messages, act on errors etc. */ 1454 unit = STUNIT(dev); 1455 dsty = STDSTY(dev); 1456 st = device_lookup_private(&st_cd, unit); 1457 hold_blksize = st->blksize; 1458 hold_density = st->density; 1459 1460 switch ((u_int)cmd) { 1461 case MTIOCGET: { 1462 struct mtget *g = (struct mtget *) arg; 1463 /* 1464 * (to get the current state of READONLY) 1465 */ 1466 error = st->ops(st, ST_OPS_MODESENSE, XS_CTL_SILENT); 1467 if (error) { 1468 /* 1469 * Ignore the error if in control mode; 1470 * this is mandated by st(4). 1471 */ 1472 if (STMODE(dev) != CTRL_MODE) 1473 break; 1474 error = 0; 1475 } 1476 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("[ioctl: get status]\n")); 1477 memset(g, 0, sizeof(struct mtget)); 1478 g->mt_type = MT_ISAR; /* Ultrix compat *//*? */ 1479 g->mt_blksiz = st->blksize; 1480 g->mt_density = st->density; 1481 g->mt_mblksiz[0] = st->modes[0].blksize; 1482 g->mt_mblksiz[1] = st->modes[1].blksize; 1483 g->mt_mblksiz[2] = st->modes[2].blksize; 1484 g->mt_mblksiz[3] = st->modes[3].blksize; 1485 g->mt_mdensity[0] = st->modes[0].density; 1486 g->mt_mdensity[1] = st->modes[1].density; 1487 g->mt_mdensity[2] = st->modes[2].density; 1488 g->mt_mdensity[3] = st->modes[3].density; 1489 g->mt_fileno = st->fileno; 1490 g->mt_blkno = st->blkno; 1491 if (st->flags & ST_READONLY) 1492 g->mt_dsreg |= MT_DS_RDONLY; 1493 if (st->flags & ST_MOUNTED) 1494 g->mt_dsreg |= MT_DS_MOUNTED; 1495 g->mt_resid = st->mt_resid; 1496 g->mt_erreg = st->mt_erreg; 1497 /* 1498 * clear latched errors. 1499 */ 1500 st->mt_resid = 0; 1501 st->mt_erreg = 0; 1502 st->asc = 0; 1503 st->ascq = 0; 1504 break; 1505 } 1506 case MTIOCTOP: { 1507 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1508 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1509 mt->mt_count)); 1510 1511 /* compat: in U*x it is a short */ 1512 number = mt->mt_count; 1513 switch ((short) (mt->mt_op)) { 1514 case MTWEOF: /* write an end-of-file record */ 1515 error = st_write_filemarks(st, number, flags); 1516 break; 1517 case MTBSF: /* backward space file */ 1518 number = -number; 1519 /* FALLTHROUGH */ 1520 case MTFSF: /* forward space file */ 1521 error = st_check_eod(st, FALSE, &nmarks, flags); 1522 if (!error) 1523 error = st_space(st, number - nmarks, 1524 SP_FILEMARKS, flags); 1525 break; 1526 case MTBSR: /* backward space record */ 1527 number = -number; 1528 /* FALLTHROUGH */ 1529 case MTFSR: /* forward space record */ 1530 error = st_check_eod(st, true, &nmarks, flags); 1531 if (!error) 1532 error = st_space(st, number, SP_BLKS, flags); 1533 break; 1534 case MTREW: /* rewind */ 1535 error = st_rewind(st, 0, flags); 1536 break; 1537 case MTOFFL: /* rewind and put the drive offline */ 1538 st_unmount(st, EJECT); 1539 break; 1540 case MTNOP: /* no operation, sets status only */ 1541 break; 1542 case MTRETEN: /* retension the tape */ 1543 error = st_load(st, LD_RETENSION, flags); 1544 if (!error) 1545 error = st_load(st, LD_LOAD, flags); 1546 break; 1547 case MTEOM: /* forward space to end of media */ 1548 error = st_check_eod(st, FALSE, &nmarks, flags); 1549 if (!error) 1550 error = st_space(st, 1, SP_EOM, flags); 1551 break; 1552 case MTCACHE: /* enable controller cache */ 1553 st->flags &= ~ST_DONTBUFFER; 1554 goto try_new_value; 1555 case MTNOCACHE: /* disable controller cache */ 1556 st->flags |= ST_DONTBUFFER; 1557 goto try_new_value; 1558 case MTERASE: /* erase volume */ 1559 error = st_erase(st, number, flags); 1560 break; 1561 case MTSETBSIZ: /* Set block size for device */ 1562 #ifdef NOTYET 1563 if (!(st->flags & ST_NEW_MOUNT)) { 1564 uprintf("re-mount tape before changing " 1565 "blocksize"); 1566 error = EINVAL; 1567 break; 1568 } 1569 #endif 1570 if (number == 0) 1571 st->flags &= ~ST_FIXEDBLOCKS; 1572 else { 1573 if ((st->blkmin || st->blkmax) && 1574 (number < st->blkmin || 1575 number > st->blkmax)) { 1576 error = EINVAL; 1577 break; 1578 } 1579 st->flags |= ST_FIXEDBLOCKS; 1580 } 1581 st->blksize = number; 1582 st->flags |= ST_BLOCK_SET; /*XXX */ 1583 goto try_new_value; 1584 case MTSETDNSTY: /* Set density for device and mode */ 1585 /* 1586 * Any number >= 0 and <= 0xff is legal. Numbers 1587 * above 0x80 are 'vendor unique'. 1588 */ 1589 if (number < 0 || number > 255) { 1590 error = EINVAL; 1591 break; 1592 } else 1593 st->density = number; 1594 goto try_new_value; 1595 case MTCMPRESS: 1596 error = st->ops(st, (number == 0) ? 1597 ST_OPS_CMPRSS_OFF : ST_OPS_CMPRSS_ON, 1598 XS_CTL_SILENT); 1599 break; 1600 case MTEWARN: 1601 if (number) 1602 st->flags |= ST_EARLYWARN; 1603 else 1604 st->flags &= ~ST_EARLYWARN; 1605 break; 1606 1607 default: 1608 error = EINVAL; 1609 } 1610 break; 1611 } 1612 case MTIOCIEOT: 1613 case MTIOCEEOT: 1614 break; 1615 case MTIOCRDSPOS: 1616 error = st_rdpos(st, 0, (uint32_t *)arg); 1617 break; 1618 case MTIOCRDHPOS: 1619 error = st_rdpos(st, 1, (uint32_t *)arg); 1620 break; 1621 case MTIOCSLOCATE: 1622 error = st_setpos(st, 0, (uint32_t *)arg); 1623 break; 1624 case MTIOCHLOCATE: 1625 error = st_setpos(st, 1, (uint32_t *)arg); 1626 break; 1627 default: 1628 error = scsipi_do_ioctl(st->sc_periph, dev, cmd, arg, flag, l); 1629 break; 1630 } 1631 return error; 1632 1633 try_new_value: 1634 /* 1635 * Check that the mode being asked for is aggreeable to the 1636 * drive. If not, put it back the way it was. 1637 * 1638 * If in control mode, we can make (persistent) mode changes 1639 * even if no medium is loaded (see st(4)). 1640 */ 1641 if ((STMODE(dev) != CTRL_MODE || (st->flags & ST_MOUNTED) != 0) && 1642 (error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 1643 /* put it back as it was */ 1644 aprint_error_dev(st->sc_dev, "cannot set selected mode\n"); 1645 st->density = hold_density; 1646 st->blksize = hold_blksize; 1647 if (st->blksize) 1648 st->flags |= ST_FIXEDBLOCKS; 1649 else 1650 st->flags &= ~ST_FIXEDBLOCKS; 1651 return error; 1652 } 1653 /* 1654 * As the drive liked it, if we are setting a new default, 1655 * set it into the structures as such. 1656 * 1657 * The means for deciding this are not finalised yet- but 1658 * if the device was opened in Control Mode, the values 1659 * are persistent now across mounts. 1660 */ 1661 if (STMODE(dev) == CTRL_MODE) { 1662 switch ((short) (mt->mt_op)) { 1663 case MTSETBSIZ: 1664 st->modes[dsty].blksize = st->blksize; 1665 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1666 break; 1667 case MTSETDNSTY: 1668 st->modes[dsty].density = st->density; 1669 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1670 break; 1671 } 1672 } 1673 return 0; 1674 } 1675 1676 /* Do a synchronous read. */ 1677 static int 1678 st_read(struct st_softc *st, char *bf, int size, int flags) 1679 { 1680 struct scsi_rw_tape cmd; 1681 1682 /* If it's a null transfer, return immediatly */ 1683 if (size == 0) 1684 return 0; 1685 memset(&cmd, 0, sizeof(cmd)); 1686 cmd.opcode = READ; 1687 if (st->flags & ST_FIXEDBLOCKS) { 1688 cmd.byte2 |= SRW_FIXED; 1689 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1690 cmd.len); 1691 } else 1692 _lto3b(size, cmd.len); 1693 return scsipi_command(st->sc_periph, 1694 (void *)&cmd, sizeof(cmd), (void *)bf, size, 0, ST_IO_TIME, NULL, 1695 flags | XS_CTL_DATA_IN); 1696 } 1697 1698 /* issue an erase command */ 1699 static int 1700 st_erase(struct st_softc *st, int full, int flags) 1701 { 1702 int tmo; 1703 struct scsi_erase cmd; 1704 1705 /* 1706 * Full erase means set LONG bit in erase command, which asks 1707 * the drive to erase the entire unit. Without this bit, we're 1708 * asking the drive to write an erase gap. 1709 */ 1710 memset(&cmd, 0, sizeof(cmd)); 1711 cmd.opcode = ERASE; 1712 if (full) { 1713 cmd.byte2 = SE_LONG; 1714 tmo = ST_SPC_TIME; 1715 } else 1716 tmo = ST_IO_TIME; 1717 1718 /* 1719 * XXX We always do this asynchronously, for now, unless the device 1720 * has the ST_Q_ERASE_NOIMM quirk. How long should we wait if we 1721 * want to (eventually) to it synchronously? 1722 */ 1723 if ((st->quirks & ST_Q_ERASE_NOIMM) == 0) 1724 cmd.byte2 |= SE_IMMED; 1725 1726 return scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1727 ST_RETRIES, tmo, NULL, flags); 1728 } 1729 1730 /* skip N blocks/filemarks/seq filemarks/eom */ 1731 static int 1732 st_space(struct st_softc *st, int number, u_int what, int flags) 1733 { 1734 struct scsi_space cmd; 1735 int error; 1736 1737 switch (what) { 1738 case SP_BLKS: 1739 if (st->flags & ST_PER_ACTION) { 1740 if (number > 0) { 1741 st->flags &= ~ST_PER_ACTION; 1742 return EIO; 1743 } else if (number < 0) { 1744 if (st->flags & ST_AT_FILEMARK) { 1745 /* 1746 * Handling of ST_AT_FILEMARK 1747 * in st_space will fill in the 1748 * right file mark count. 1749 */ 1750 error = st_space(st, 0, SP_FILEMARKS, 1751 flags); 1752 if (error) 1753 return error; 1754 } 1755 if (st->flags & ST_BLANK_READ) { 1756 st->flags &= ~ST_BLANK_READ; 1757 return EIO; 1758 } 1759 st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); 1760 } 1761 } 1762 break; 1763 case SP_FILEMARKS: 1764 if (st->flags & ST_EIO_PENDING) { 1765 if (number > 0) { 1766 /* pretend we just discovered the error */ 1767 st->flags &= ~ST_EIO_PENDING; 1768 return EIO; 1769 } else if (number < 0) { 1770 /* back away from the error */ 1771 st->flags &= ~ST_EIO_PENDING; 1772 } 1773 } 1774 if (st->flags & ST_AT_FILEMARK) { 1775 st->flags &= ~ST_AT_FILEMARK; 1776 number--; 1777 } 1778 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 1779 /* back away from unwritten tape */ 1780 st->flags &= ~ST_BLANK_READ; 1781 number++; /* XXX dubious */ 1782 } 1783 break; 1784 case SP_EOM: 1785 if (st->flags & ST_EOM_PENDING) { 1786 /* we're already there */ 1787 st->flags &= ~ST_EOM_PENDING; 1788 return 0; 1789 } 1790 if (st->flags & ST_EIO_PENDING) { 1791 /* pretend we just discovered the error */ 1792 st->flags &= ~ST_EIO_PENDING; 1793 return EIO; 1794 } 1795 if (st->flags & ST_AT_FILEMARK) 1796 st->flags &= ~ST_AT_FILEMARK; 1797 break; 1798 } 1799 if (number == 0) 1800 return 0; 1801 1802 memset(&cmd, 0, sizeof(cmd)); 1803 cmd.opcode = SPACE; 1804 cmd.byte2 = what; 1805 _lto3b(number, cmd.number); 1806 1807 st->flags &= ~ST_POSUPDATED; 1808 st->last_ctl_resid = 0; 1809 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1810 0, ST_SPC_TIME, NULL, flags); 1811 1812 if (error == 0 && (st->flags & ST_POSUPDATED) == 0) { 1813 number = number - st->last_ctl_resid; 1814 if (what == SP_BLKS) { 1815 if (st->blkno != -1) 1816 st->blkno += number; 1817 } else if (what == SP_FILEMARKS) { 1818 if (st->fileno != -1) { 1819 st->fileno += number; 1820 if (number > 0) 1821 st->blkno = 0; 1822 else if (number < 0) 1823 st->blkno = -1; 1824 } 1825 } else if (what == SP_EOM) { 1826 /* This loses us relative position. */ 1827 st->fileno = st->blkno = -1; 1828 } 1829 } 1830 return error; 1831 } 1832 1833 /* 1834 * write N filemarks 1835 */ 1836 static int 1837 st_write_filemarks(struct st_softc *st, int number, int flags) 1838 { 1839 int error; 1840 struct scsi_write_filemarks cmd; 1841 1842 /* 1843 * It's hard to write a negative number of file marks. 1844 * Don't try. 1845 */ 1846 if (number < 0) { 1847 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1848 ("EINVAL: st_write_filemarks not writing %d file marks\n", number)); 1849 return EINVAL; 1850 } 1851 1852 switch (number) { 1853 case 0: /* really a command to sync the drive's buffers */ 1854 break; 1855 case 1: 1856 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 1857 st->flags &= ~ST_WRITTEN; 1858 else 1859 st->flags |= ST_FM_WRITTEN; 1860 st->flags &= ~ST_PER_ACTION; 1861 break; 1862 default: 1863 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 1864 } 1865 1866 memset(&cmd, 0, sizeof(cmd)); 1867 cmd.opcode = WRITE_FILEMARKS; 1868 if (SCSIPI_BUSTYPE_TYPE(scsipi_periph_bustype(st->sc_periph)) == 1869 SCSIPI_BUSTYPE_ATAPI) 1870 cmd.byte2 = SR_IMMED; 1871 /* 1872 * The ATAPI Onstream DI-30 doesn't support writing filemarks, but 1873 * WRITE_FILEMARKS is still used to flush the buffer 1874 */ 1875 if ((st->quirks & ST_Q_NOFILEMARKS) == 0) 1876 _lto3b(number, cmd.number); 1877 1878 /* XXX WE NEED TO BE ABLE TO GET A RESIDIUAL XXX */ 1879 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1880 0, ST_IO_TIME * 4, NULL, flags); 1881 if (error == 0 && st->fileno != -1) 1882 st->fileno += number; 1883 return error; 1884 } 1885 1886 /* 1887 * Make sure the right number of file marks is on tape if the 1888 * tape has been written. If the position argument is true, 1889 * leave the tape positioned where it was originally. 1890 * 1891 * nmarks returns the number of marks to skip (or, if position 1892 * true, which were skipped) to get back original position. 1893 */ 1894 static int 1895 st_check_eod(struct st_softc *st, boolean position, int *nmarks, int flags) 1896 { 1897 int error; 1898 1899 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 1900 default: 1901 *nmarks = 0; 1902 return 0; 1903 case ST_WRITTEN: 1904 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 1905 *nmarks = 1; 1906 break; 1907 case ST_WRITTEN | ST_2FM_AT_EOD: 1908 *nmarks = 2; 1909 } 1910 error = st_write_filemarks(st, *nmarks, flags); 1911 if (position && !error) 1912 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 1913 return error; 1914 } 1915 1916 /* load/unload/retension */ 1917 static int 1918 st_load(struct st_softc *st, u_int type, int flags) 1919 { 1920 int error; 1921 struct scsi_load cmd; 1922 1923 if (type != LD_LOAD) { 1924 int nmarks; 1925 1926 error = st_check_eod(st, FALSE, &nmarks, flags); 1927 if (error) { 1928 aprint_error_dev(st->sc_dev, 1929 "failed to write closing filemarks at " 1930 "unload, errno=%d\n", error); 1931 return error; 1932 } 1933 } 1934 if (st->quirks & ST_Q_IGNORE_LOADS) { 1935 if (type == LD_LOAD) 1936 /* 1937 * If we ignore loads, at least we should try a rewind. 1938 */ 1939 return st_rewind(st, 0, flags); 1940 /* otherwise, we should do what's asked of us */ 1941 } 1942 1943 memset(&cmd, 0, sizeof(cmd)); 1944 cmd.opcode = LOAD; 1945 if (SCSIPI_BUSTYPE_TYPE(scsipi_periph_bustype(st->sc_periph)) == 1946 SCSIPI_BUSTYPE_ATAPI) 1947 cmd.byte2 = SR_IMMED; 1948 cmd.how = type; 1949 1950 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1951 ST_RETRIES, ST_SPC_TIME, NULL, flags); 1952 if (error) { 1953 aprint_error_dev(st->sc_dev, "error %d in st_load (op %d)\n", 1954 error, type); 1955 } 1956 return error; 1957 } 1958 1959 /* Rewind the device */ 1960 static int 1961 st_rewind(struct st_softc *st, u_int immediate, int flags) 1962 { 1963 struct scsi_rewind cmd; 1964 int error; 1965 int nmarks; 1966 int timeout; 1967 1968 error = st_check_eod(st, FALSE, &nmarks, flags); 1969 if (error) { 1970 aprint_error_dev(st->sc_dev, 1971 "failed to write closing filemarks at " 1972 "rewind, errno=%d\n", error); 1973 return error; 1974 } 1975 st->flags &= ~ST_PER_ACTION; 1976 1977 /* If requestor asked for immediate response, set a short timeout */ 1978 timeout = immediate ? ST_CTL_TIME : ST_SPC_TIME; 1979 1980 /* ATAPI tapes always need immediate to be set */ 1981 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1982 immediate = SR_IMMED; 1983 1984 memset(&cmd, 0, sizeof(cmd)); 1985 cmd.opcode = REWIND; 1986 cmd.byte2 = immediate; 1987 1988 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1989 ST_RETRIES, timeout, NULL, flags); 1990 if (error) { 1991 aprint_error_dev(st->sc_dev, "error %d trying to rewind\n", 1992 error); 1993 /* lost position */ 1994 st->fileno = st->blkno = -1; 1995 } else 1996 st->fileno = st->blkno = 0; 1997 return error; 1998 } 1999 2000 static int 2001 st_rdpos(struct st_softc *st, int hard, uint32_t *blkptr) 2002 { 2003 int error; 2004 uint8_t posdata[20]; 2005 struct scsi_tape_read_position cmd; 2006 2007 /* 2008 * We try and flush any buffered writes here if we were writing 2009 * and we're trying to get hardware block position. It eats 2010 * up performance substantially, but I'm wary of drive firmware. 2011 * 2012 * I think that *logical* block position is probably okay- 2013 * but hardware block position might have to wait for data 2014 * to hit media to be valid. Caveat Emptor. 2015 */ 2016 2017 if (hard && (st->flags & ST_WRITTEN)) { 2018 /* First flush any pending writes... */ 2019 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 2020 /* 2021 * The latter case is for 'write protected' tapes 2022 * which are too stupid to recognize a zero count 2023 * for writing filemarks as a no-op. 2024 */ 2025 if (error != 0 && error != EACCES && error != EROFS) 2026 return error; 2027 } 2028 2029 memset(&cmd, 0, sizeof(cmd)); 2030 memset(&posdata, 0, sizeof(posdata)); 2031 cmd.opcode = READ_POSITION; 2032 if (hard) 2033 cmd.byte1 = 1; 2034 2035 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 2036 (void *)&posdata, sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, 2037 XS_CTL_SILENT | XS_CTL_DATA_IN); 2038 2039 if (error == 0) { 2040 #if 0 2041 printf("posdata:"); 2042 for (hard = 0; hard < sizeof(posdata); hard++) 2043 printf("%02x ", posdata[hard] & 0xff); 2044 printf("\n"); 2045 #endif 2046 if (posdata[0] & 0x4) { /* Block Position Unknown */ 2047 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 2048 ("EINVAL: strdpos block position unknown\n")); 2049 error = EINVAL; 2050 } 2051 else 2052 *blkptr = _4btol(&posdata[4]); 2053 } 2054 return error; 2055 } 2056 2057 static int 2058 st_setpos(struct st_softc *st, int hard, uint32_t *blkptr) 2059 { 2060 int error; 2061 struct scsi_tape_locate cmd; 2062 2063 /* 2064 * We used to try and flush any buffered writes here. 2065 * Now we push this onto user applications to either 2066 * flush the pending writes themselves (via a zero count 2067 * WRITE FILEMARKS command) or they can trust their tape 2068 * drive to do this correctly for them. 2069 * 2070 * There are very ugly performance limitations otherwise. 2071 */ 2072 2073 memset(&cmd, 0, sizeof(cmd)); 2074 cmd.opcode = LOCATE; 2075 if (hard) 2076 cmd.byte2 = 1 << 2; 2077 _lto4b(*blkptr, cmd.blkaddr); 2078 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 2079 ST_RETRIES, ST_SPC_TIME, NULL, 0); 2080 /* 2081 * Note file && block number position now unknown (if 2082 * these things ever start being maintained in this driver) 2083 */ 2084 st->fileno = st->blkno = -1; 2085 return error; 2086 } 2087 2088 2089 /* 2090 * Look at the returned sense and act on the error and determine 2091 * the unix error number to pass back..., 0 (== report no error), 2092 * -1 = retry the operation, -2 continue error processing. 2093 */ 2094 static int 2095 st_interpret_sense(struct scsipi_xfer *xs) 2096 { 2097 struct scsipi_periph *periph = xs->xs_periph; 2098 struct scsi_sense_data *sense = &xs->sense.scsi_sense; 2099 struct buf *bp = xs->bp; 2100 struct st_softc *st = device_private(periph->periph_dev); 2101 int retval = EJUSTRETURN; 2102 int doprint = ((xs->xs_control & XS_CTL_SILENT) == 0); 2103 uint8_t key; 2104 int32_t info; 2105 2106 /* 2107 * If it isn't a extended or extended/deferred error, let 2108 * the generic code handle it. 2109 */ 2110 if (SSD_RCODE(sense->response_code) != SSD_RCODE_CURRENT && 2111 SSD_RCODE(sense->response_code) != SSD_RCODE_DEFERRED) 2112 return retval; 2113 2114 if (sense->response_code & SSD_RCODE_VALID) 2115 info = _4btol(sense->info); 2116 else 2117 info = (st->flags & ST_FIXEDBLOCKS) ? 2118 xs->datalen / st->blksize : xs->datalen; 2119 key = SSD_SENSE_KEY(sense->flags); 2120 st->mt_erreg = key; 2121 st->asc = sense->asc; 2122 st->ascq = sense->ascq; 2123 st->mt_resid = (short) info; 2124 2125 if (key == SKEY_NOT_READY && st->asc == 0x4 && st->ascq == 0x1) { 2126 /* Not Ready, Logical Unit Is in Process Of Becoming Ready */ 2127 if (!callout_pending(&periph->periph_callout)) 2128 scsipi_periph_freeze(periph, 1); 2129 callout_reset(&periph->periph_callout, 2130 hz, scsipi_periph_timed_thaw, periph); 2131 return ERESTART; 2132 } 2133 2134 /* If the device is not open yet, let generic handle */ 2135 if ((periph->periph_flags & PERIPH_OPEN) == 0) 2136 return retval; 2137 2138 xs->resid = info; 2139 if (st->flags & ST_FIXEDBLOCKS) { 2140 if (bp) { 2141 xs->resid *= st->blksize; 2142 st->last_io_resid = xs->resid; 2143 } else 2144 st->last_ctl_resid = xs->resid; 2145 if (key == SKEY_VOLUME_OVERFLOW) { 2146 st->flags |= ST_EIO_PENDING; 2147 if (bp) 2148 bp->b_resid = xs->resid; 2149 } else if (sense->flags & SSD_EOM) { 2150 if ((st->flags & ST_EARLYWARN) == 0) 2151 st->flags |= ST_EIO_PENDING; 2152 st->flags |= ST_EOM_PENDING; 2153 if (bp) { 2154 #if 0 2155 bp->b_resid = xs->resid; 2156 #else 2157 /* 2158 * Grotesque as it seems, the few times 2159 * I've actually seen a non-zero resid, 2160 * the tape drive actually lied and had 2161 * written all the data! 2162 */ 2163 bp->b_resid = 0; 2164 #endif 2165 } 2166 } 2167 if (sense->flags & SSD_FILEMARK) { 2168 st->flags |= ST_AT_FILEMARK; 2169 if (bp) 2170 bp->b_resid = xs->resid; 2171 if (st->fileno != (daddr_t) -1) { 2172 st->fileno++; 2173 st->blkno = 0; 2174 st->flags |= ST_POSUPDATED; 2175 } 2176 } 2177 if (sense->flags & SSD_ILI) { 2178 st->flags |= ST_EIO_PENDING; 2179 if (bp) 2180 bp->b_resid = xs->resid; 2181 if (sense->response_code & SSD_RCODE_VALID && 2182 (xs->xs_control & XS_CTL_SILENT) == 0) 2183 aprint_error_dev(st->sc_dev, 2184 "block wrong size, %d blocks residual\n", 2185 info); 2186 2187 /* 2188 * This quirk code helps the drive read 2189 * the first tape block, regardless of 2190 * format. That is required for these 2191 * drives to return proper MODE SENSE 2192 * information. 2193 */ 2194 if ((st->quirks & ST_Q_SENSE_HELP) && 2195 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 2196 st->blksize -= 512; 2197 else if ((st->flags & ST_POSUPDATED) == 0) { 2198 if (st->blkno != (daddr_t) -1) { 2199 st->blkno += 2200 (xs->datalen / st->blksize); 2201 st->flags |= ST_POSUPDATED; 2202 } 2203 } 2204 } 2205 /* 2206 * If data wanted and no data was transferred, do it immediately 2207 */ 2208 if (xs->datalen && xs->resid >= xs->datalen) { 2209 if (st->flags & ST_EIO_PENDING) 2210 return EIO; 2211 if (st->flags & ST_AT_FILEMARK) { 2212 if (bp) 2213 bp->b_resid = xs->resid; 2214 return 0; 2215 } 2216 } 2217 } else { /* must be variable mode */ 2218 if (bp) 2219 st->last_io_resid = xs->resid; 2220 else 2221 st->last_ctl_resid = xs->resid; 2222 if (sense->flags & SSD_EOM) { 2223 /* 2224 * The current semantics of this 2225 * driver requires EOM detection 2226 * to return EIO unless early 2227 * warning detection is enabled 2228 * for variable mode (this is always 2229 * on for fixed block mode). 2230 */ 2231 if (st->flags & ST_EARLYWARN) { 2232 st->flags |= ST_EOM_PENDING; 2233 retval = 0; 2234 } else { 2235 retval = EIO; 2236 /* 2237 * If we return an error we can't claim to 2238 * have transfered all data. 2239 */ 2240 if (xs->resid == 0) 2241 xs->resid = xs->datalen; 2242 } 2243 2244 /* 2245 * If it's an unadorned EOM detection, 2246 * suppress printing an error. 2247 */ 2248 if (key == SKEY_NO_SENSE) { 2249 doprint = 0; 2250 } 2251 } else if (sense->flags & SSD_FILEMARK) { 2252 retval = 0; 2253 if (st->fileno != (daddr_t) -1) { 2254 st->fileno++; 2255 st->blkno = 0; 2256 st->flags |= ST_POSUPDATED; 2257 } 2258 } else if (sense->flags & SSD_ILI) { 2259 if (info < 0) { 2260 /* 2261 * The tape record was bigger than the read 2262 * we issued. 2263 */ 2264 if ((xs->xs_control & XS_CTL_SILENT) == 0) { 2265 aprint_error_dev(st->sc_dev, 2266 "%d-byte tape record too big" 2267 " for %d-byte user buffer\n", 2268 xs->datalen - info, xs->datalen); 2269 } 2270 retval = EIO; 2271 } else { 2272 retval = 0; 2273 if (st->blkno != (daddr_t) -1) { 2274 st->blkno++; 2275 st->flags |= ST_POSUPDATED; 2276 } 2277 } 2278 } 2279 if (bp) 2280 bp->b_resid = xs->resid; 2281 } 2282 2283 #ifndef SCSIPI_DEBUG 2284 if (retval == 0 && key == SKEY_NO_SENSE) 2285 doprint = 0; 2286 #endif 2287 if (key == SKEY_BLANK_CHECK) { 2288 /* 2289 * This quirk code helps the drive read the 2290 * first tape block, regardless of format. That 2291 * is required for these drives to return proper 2292 * MODE SENSE information. 2293 */ 2294 if ((st->quirks & ST_Q_SENSE_HELP) && 2295 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 2296 /* still starting */ 2297 st->blksize -= 512; 2298 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 2299 st->flags |= ST_BLANK_READ; 2300 xs->resid = xs->datalen; 2301 if (bp) { 2302 bp->b_resid = xs->resid; 2303 /* return an EOF */ 2304 } 2305 retval = 0; 2306 /* lost position */ 2307 st->fileno = st->blkno = -1; 2308 } 2309 } 2310 2311 /* 2312 * If generic sense processing will continue, we should not 2313 * print sense info here. 2314 */ 2315 if (retval == EJUSTRETURN) 2316 doprint = 0; 2317 2318 if (doprint) { 2319 /* Print verbose sense info if possible */ 2320 if (scsipi_print_sense(xs, 0) != 0) 2321 return retval; 2322 2323 /* Print less-verbose sense info */ 2324 scsipi_printaddr(periph); 2325 printf("Sense Key 0x%02x", key); 2326 if ((sense->response_code & SSD_RCODE_VALID) != 0) { 2327 switch (key) { 2328 case SKEY_NOT_READY: 2329 case SKEY_ILLEGAL_REQUEST: 2330 case SKEY_UNIT_ATTENTION: 2331 case SKEY_DATA_PROTECT: 2332 break; 2333 case SKEY_VOLUME_OVERFLOW: 2334 case SKEY_BLANK_CHECK: 2335 printf(", requested size: %d (decimal)", info); 2336 break; 2337 case SKEY_ABORTED_COMMAND: 2338 if (xs->xs_retries) 2339 printf(", retrying"); 2340 printf(", cmd 0x%x, info 0x%x", 2341 xs->cmd->opcode, info); 2342 break; 2343 default: 2344 printf(", info = %d (decimal)", info); 2345 } 2346 } 2347 if (sense->extra_len != 0) { 2348 int n; 2349 printf(", data ="); 2350 for (n = 0; n < sense->extra_len; n++) 2351 printf(" %02x", sense->csi[n]); 2352 } 2353 printf("\n"); 2354 } 2355 return retval; 2356 } 2357 2358 /* 2359 * The quirk here is that the drive returns some value to st_mode_sense 2360 * incorrectly until the tape has actually passed by the head. 2361 * 2362 * The method is to set the drive to large fixed-block state (user-specified 2363 * density and 1024-byte blocks), then read and rewind to get it to sense the 2364 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 2365 * work, as a last resort, try variable- length blocks. The result will be 2366 * the ability to do an accurate st_mode_sense. 2367 * 2368 * We know we can do a rewind because we just did a load, which implies rewind. 2369 * Rewind seems preferable to space backward if we have a virgin tape. 2370 * 2371 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 2372 * error processing, both part of st_interpret_sense. 2373 */ 2374 static int 2375 st_touch_tape(struct st_softc *st) 2376 { 2377 char *bf; 2378 int readsize; 2379 int error; 2380 2381 bf = malloc(1024, M_TEMP, M_NOWAIT); 2382 if (bf == NULL) 2383 return ENOMEM; 2384 2385 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 2386 goto bad; 2387 2388 /* 2389 * If the block size is already known from the 2390 * sense data, use it. Else start probing at 1024. 2391 */ 2392 if (st->media_blksize > 0) 2393 st->blksize = st->media_blksize; 2394 else 2395 st->blksize = 1024; 2396 2397 do { 2398 switch (st->blksize) { 2399 case 512: 2400 case 1024: 2401 readsize = st->blksize; 2402 st->flags |= ST_FIXEDBLOCKS; 2403 break; 2404 default: 2405 readsize = 1; 2406 st->flags &= ~ST_FIXEDBLOCKS; 2407 } 2408 if ((error = st->ops(st, ST_OPS_MODESELECT, XS_CTL_SILENT)) 2409 != 0) { 2410 /* 2411 * The device did not agree with the proposed 2412 * block size. If we exhausted our options, 2413 * return failure, else try another. 2414 */ 2415 if (readsize == 1) 2416 goto bad; 2417 st->blksize -= 512; 2418 continue; 2419 } 2420 st_read(st, bf, readsize, XS_CTL_SILENT); /* XXX */ 2421 if ((error = st_rewind(st, 0, 0)) != 0) { 2422 bad: free(bf, M_TEMP); 2423 return error; 2424 } 2425 } while (readsize != 1 && readsize > st->blksize); 2426 2427 free(bf, M_TEMP); 2428 return 0; 2429 } 2430 2431 static int 2432 stdump(dev_t dev, daddr_t blkno, void *va, size_t size) 2433 { 2434 /* Not implemented. */ 2435 return ENXIO; 2436 } 2437 2438 /* 2439 * Send a filled out parameter structure to the drive to 2440 * set it into the desire modes etc. 2441 */ 2442 int 2443 st_mode_select(struct st_softc *st, int flags) 2444 { 2445 u_int select_len; 2446 struct select { 2447 struct scsi_mode_parameter_header_6 header; 2448 struct scsi_general_block_descriptor blk_desc; 2449 u_char sense_data[MAX_PAGE_0_SIZE]; 2450 } select; 2451 struct scsipi_periph *periph = st->sc_periph; 2452 2453 select_len = sizeof(select.header) + sizeof(select.blk_desc) + 2454 st->page_0_size; 2455 2456 /* 2457 * This quirk deals with drives that have only one valid mode 2458 * and think this gives them license to reject all mode selects, 2459 * even if the selected mode is the one that is supported. 2460 */ 2461 if (st->quirks & ST_Q_UNIMODAL) { 2462 SC_DEBUG(periph, SCSIPI_DB3, 2463 ("not setting density 0x%x blksize 0x%x\n", 2464 st->density, st->blksize)); 2465 return 0; 2466 } 2467 2468 /* Set up for a mode select */ 2469 memset(&select, 0, sizeof(select)); 2470 select.header.blk_desc_len = sizeof(struct 2471 scsi_general_block_descriptor); 2472 select.header.dev_spec &= ~SMH_DSP_BUFF_MODE; 2473 select.blk_desc.density = st->density; 2474 if (st->flags & ST_DONTBUFFER) 2475 select.header.dev_spec |= SMH_DSP_BUFF_MODE_OFF; 2476 else 2477 select.header.dev_spec |= SMH_DSP_BUFF_MODE_ON; 2478 if (st->flags & ST_FIXEDBLOCKS) 2479 _lto3b(st->blksize, select.blk_desc.blklen); 2480 if (st->page_0_size) 2481 memcpy(select.sense_data, st->sense_data, st->page_0_size); 2482 2483 /* do the command */ 2484 return scsipi_mode_select(periph, 0, &select.header, select_len, 2485 flags, ST_RETRIES, ST_CTL_TIME); 2486 } 2487
Indexes created Mon Sep 22 05:09:51 GMT 2025