st.c revision 1.224
1 /* $NetBSD: st.c,v 1.224 2014/07/25 08:02:20 dholland 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 1.224 2014/07/25 08:02:20 dholland Exp $"); 54 55 #include "opt_scsi.h" 56 57 #include <sys/param.h> 58 #include <sys/systm.h> 59 #include <sys/fcntl.h> 60 #include <sys/errno.h> 61 #include <sys/ioctl.h> 62 #include <sys/malloc.h> 63 #include <sys/buf.h> 64 #include <sys/bufq.h> 65 #include <sys/proc.h> 66 #include <sys/mtio.h> 67 #include <sys/device.h> 68 #include <sys/conf.h> 69 #include <sys/kernel.h> 70 #include <sys/vnode.h> 71 #include <sys/iostat.h> 72 #include <sys/sysctl.h> 73 74 #include <dev/scsipi/scsi_spc.h> 75 #include <dev/scsipi/scsipi_all.h> 76 #include <dev/scsipi/scsi_all.h> 77 #include <dev/scsipi/scsi_tape.h> 78 #include <dev/scsipi/scsipiconf.h> 79 #include <dev/scsipi/scsipi_base.h> 80 #include <dev/scsipi/stvar.h> 81 82 /* Defines for device specific stuff */ 83 #define DEF_FIXED_BSIZE 512 84 85 #define STMODE(z) ( minor(z) & 0x03) 86 #define STDSTY(z) ((minor(z) >> 2) & 0x03) 87 #define STUNIT(z) ((minor(z) >> 4) ) 88 #define STNMINOR 16 89 90 #define NORMAL_MODE 0 91 #define NOREW_MODE 1 92 #define EJECT_MODE 2 93 #define CTRL_MODE 3 94 95 #ifndef ST_MOUNT_DELAY 96 #define ST_MOUNT_DELAY 0 97 #endif 98 99 static dev_type_open(stopen); 100 static dev_type_close(stclose); 101 static dev_type_read(stread); 102 static dev_type_write(stwrite); 103 static dev_type_ioctl(stioctl); 104 static dev_type_strategy(ststrategy); 105 static dev_type_dump(stdump); 106 107 const struct bdevsw st_bdevsw = { 108 .d_open = stopen, 109 .d_close = stclose, 110 .d_strategy = ststrategy, 111 .d_ioctl = stioctl, 112 .d_dump = stdump, 113 .d_psize = nosize, 114 .d_discard = nodiscard, 115 .d_flag = D_TAPE 116 }; 117 118 const struct cdevsw st_cdevsw = { 119 .d_open = stopen, 120 .d_close = stclose, 121 .d_read = stread, 122 .d_write = stwrite, 123 .d_ioctl = stioctl, 124 .d_stop = nostop, 125 .d_tty = notty, 126 .d_poll = nopoll, 127 .d_mmap = nommap, 128 .d_kqfilter = nokqfilter, 129 .d_flag = D_TAPE 130 }; 131 132 /* 133 * Define various devices that we know mis-behave in some way, 134 * and note how they are bad, so we can correct for them 135 */ 136 137 static const struct st_quirk_inquiry_pattern st_quirk_patterns[] = { 138 {{T_SEQUENTIAL, T_REMOV, 139 " ", " ", " "}, {0, 0, { 140 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 141 {ST_Q_FORCE_BLKSIZE, 512, QIC_24}, /* minor 4-7 */ 142 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_1600}, /* minor 8-11 */ 143 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_6250} /* minor 12-15 */ 144 }}}, 145 {{T_SEQUENTIAL, T_REMOV, 146 "TANDBERG", " TDC 3600 ", ""}, {0, 12, { 147 {0, 0, 0}, /* minor 0-3 */ 148 {ST_Q_FORCE_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 149 {0, 0, QIC_150}, /* minor 8-11 */ 150 {0, 0, QIC_120} /* minor 12-15 */ 151 }}}, 152 {{T_SEQUENTIAL, T_REMOV, 153 "TANDBERG", " TDC 3800 ", ""}, {0, 0, { 154 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 155 {0, 0, QIC_525}, /* minor 4-7 */ 156 {0, 0, QIC_150}, /* minor 8-11 */ 157 {0, 0, QIC_120} /* minor 12-15 */ 158 }}}, 159 {{T_SEQUENTIAL, T_REMOV, 160 "TANDBERG", " SLR5 4/8GB ", ""}, {0, 0, { 161 {ST_Q_FORCE_BLKSIZE, 1024, 0}, /* minor 0-3 */ 162 {0, 0, 0}, /* minor 4-7 */ 163 {0, 0, 0}, /* minor 8-11 */ 164 {0, 0, 0} /* minor 12-15 */ 165 }}}, 166 /* 167 * lacking a manual for the 4200, it's not clear what the 168 * specific density codes should be- the device is a 2.5GB 169 * capable QIC drive, those density codes aren't readily 170 * availabel. The 'default' will just have to do. 171 */ 172 {{T_SEQUENTIAL, T_REMOV, 173 "TANDBERG", " TDC 4200 ", ""}, {0, 0, { 174 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 175 {0, 0, QIC_525}, /* minor 4-7 */ 176 {0, 0, QIC_150}, /* minor 8-11 */ 177 {0, 0, QIC_120} /* minor 12-15 */ 178 }}}, 179 /* 180 * At least -005 and -007 need this. I'll assume they all do unless I 181 * hear otherwise. - mycroft, 31MAR1994 182 */ 183 {{T_SEQUENTIAL, T_REMOV, 184 "ARCHIVE ", "VIPER 2525 25462", ""}, {0, 0, { 185 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 186 {ST_Q_SENSE_HELP, 0, QIC_525}, /* minor 4-7 */ 187 {0, 0, QIC_150}, /* minor 8-11 */ 188 {0, 0, QIC_120} /* minor 12-15 */ 189 }}}, 190 /* 191 * One user reports that this works for his tape drive. It probably 192 * needs more work. - mycroft, 09APR1994 193 */ 194 {{T_SEQUENTIAL, T_REMOV, 195 "SANKYO ", "CP525 ", ""}, {0, 0, { 196 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 197 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 198 {0, 0, QIC_150}, /* minor 8-11 */ 199 {0, 0, QIC_120} /* minor 12-15 */ 200 }}}, 201 {{T_SEQUENTIAL, T_REMOV, 202 "ANRITSU ", "DMT780 ", ""}, {0, 0, { 203 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 204 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 205 {0, 0, QIC_150}, /* minor 8-11 */ 206 {0, 0, QIC_120} /* minor 12-15 */ 207 }}}, 208 {{T_SEQUENTIAL, T_REMOV, 209 "ARCHIVE ", "VIPER 150 21247", ""}, {ST_Q_ERASE_NOIMM, 12, { 210 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 211 {0, 0, QIC_150}, /* minor 4-7 */ 212 {0, 0, QIC_120}, /* minor 8-11 */ 213 {0, 0, QIC_24} /* minor 12-15 */ 214 }}}, 215 {{T_SEQUENTIAL, T_REMOV, 216 "ARCHIVE ", "VIPER 150 21531", ""}, {ST_Q_ERASE_NOIMM, 12, { 217 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 218 {0, 0, QIC_150}, /* minor 4-7 */ 219 {0, 0, QIC_120}, /* minor 8-11 */ 220 {0, 0, QIC_24} /* minor 12-15 */ 221 }}}, 222 {{T_SEQUENTIAL, T_REMOV, 223 "WANGTEK ", "5099ES SCSI", ""}, {0, 0, { 224 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 225 {0, 0, QIC_11}, /* minor 4-7 */ 226 {0, 0, QIC_24}, /* minor 8-11 */ 227 {0, 0, QIC_24} /* minor 12-15 */ 228 }}}, 229 {{T_SEQUENTIAL, T_REMOV, 230 "WANGTEK ", "5150ES SCSI", ""}, {0, 0, { 231 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 232 {0, 0, QIC_24}, /* minor 4-7 */ 233 {0, 0, QIC_120}, /* minor 8-11 */ 234 {0, 0, QIC_150} /* minor 12-15 */ 235 }}}, 236 {{T_SEQUENTIAL, T_REMOV, 237 "WANGTEK ", "5525ES SCSI REV7", ""}, {0, 0, { 238 {0, 0, 0}, /* minor 0-3 */ 239 {ST_Q_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 240 {0, 0, QIC_150}, /* minor 8-11 */ 241 {0, 0, QIC_120} /* minor 12-15 */ 242 }}}, 243 {{T_SEQUENTIAL, T_REMOV, 244 "WangDAT ", "Model 1300 ", ""}, {0, 0, { 245 {0, 0, 0}, /* minor 0-3 */ 246 {ST_Q_FORCE_BLKSIZE, 512, DDS}, /* minor 4-7 */ 247 {ST_Q_FORCE_BLKSIZE, 1024, DDS}, /* minor 8-11 */ 248 {ST_Q_FORCE_BLKSIZE, 0, DDS} /* minor 12-15 */ 249 }}}, 250 {{T_SEQUENTIAL, T_REMOV, 251 "EXABYTE ", "EXB-8200 ", "263H"}, {0, 5, { 252 {0, 0, 0}, /* minor 0-3 */ 253 {0, 0, 0}, /* minor 4-7 */ 254 {0, 0, 0}, /* minor 8-11 */ 255 {0, 0, 0} /* minor 12-15 */ 256 }}}, 257 {{T_SEQUENTIAL, T_REMOV, 258 "STK", "9490", ""}, 259 {ST_Q_FORCE_BLKSIZE, 0, { 260 {0, 0, 0}, /* minor 0-3 */ 261 {0, 0, 0}, /* minor 4-7 */ 262 {0, 0, 0}, /* minor 8-11 */ 263 {0, 0, 0} /* minor 12-15 */ 264 }}}, 265 {{T_SEQUENTIAL, T_REMOV, 266 "STK", "SD-3", ""}, 267 {ST_Q_FORCE_BLKSIZE, 0, { 268 {0, 0, 0}, /* minor 0-3 */ 269 {0, 0, 0}, /* minor 4-7 */ 270 {0, 0, 0}, /* minor 8-11 */ 271 {0, 0, 0} /* minor 12-15 */ 272 }}}, 273 {{T_SEQUENTIAL, T_REMOV, 274 "IBM", "03590", ""}, {ST_Q_IGNORE_LOADS, 0, { 275 {0, 0, 0}, /* minor 0-3 */ 276 {0, 0, 0}, /* minor 4-7 */ 277 {0, 0, 0}, /* minor 8-11 */ 278 {0, 0, 0} /* minor 12-15 */ 279 }}}, 280 {{T_SEQUENTIAL, T_REMOV, 281 "HP ", "T4000s ", ""}, {ST_Q_UNIMODAL, 0, { 282 {0, 0, QIC_3095}, /* minor 0-3 */ 283 {0, 0, QIC_3095}, /* minor 4-7 */ 284 {0, 0, QIC_3095}, /* minor 8-11 */ 285 {0, 0, QIC_3095}, /* minor 12-15 */ 286 }}}, 287 #if 0 288 {{T_SEQUENTIAL, T_REMOV, 289 "EXABYTE ", "EXB-8200 ", ""}, {0, 12, { 290 {0, 0, 0}, /* minor 0-3 */ 291 {0, 0, 0}, /* minor 4-7 */ 292 {0, 0, 0}, /* minor 8-11 */ 293 {0, 0, 0} /* minor 12-15 */ 294 }}}, 295 #endif 296 {{T_SEQUENTIAL, T_REMOV, 297 "TEAC ", "MT-2ST/N50 ", ""}, {ST_Q_IGNORE_LOADS, 0, { 298 {0, 0, 0}, /* minor 0-3 */ 299 {0, 0, 0}, /* minor 4-7 */ 300 {0, 0, 0}, /* minor 8-11 */ 301 {0, 0, 0} /* minor 12-15 */ 302 }}}, 303 {{T_SEQUENTIAL, T_REMOV, 304 "OnStream", "ADR50 Drive", ""}, {ST_Q_UNIMODAL, 0, { 305 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 306 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 4-7 */ 307 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 8-11 */ 308 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 12-15 */ 309 }}}, 310 {{T_SEQUENTIAL, T_REMOV, 311 "OnStream DI-30", "", "1.0"}, {ST_Q_NOFILEMARKS, 0, { 312 {0, 0, 0}, /* minor 0-3 */ 313 {0, 0, 0}, /* minor 4-7 */ 314 {0, 0, 0}, /* minor 8-11 */ 315 {0, 0, 0} /* minor 12-15 */ 316 }}}, 317 {{T_SEQUENTIAL, T_REMOV, 318 "NCR H621", "0-STD-03-46F880 ", ""}, {ST_Q_NOPREVENT, 0, { 319 {0, 0, 0}, /* minor 0-3 */ 320 {0, 0, 0}, /* minor 4-7 */ 321 {0, 0, 0}, /* minor 8-11 */ 322 {0, 0, 0} /* minor 12-15 */ 323 }}}, 324 {{T_SEQUENTIAL, T_REMOV, 325 "Seagate STT3401A", "hp0atxa", ""}, {0, 0, { 326 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 327 {ST_Q_FORCE_BLKSIZE, 1024, 0}, /* minor 4-7 */ 328 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 8-11 */ 329 {ST_Q_FORCE_BLKSIZE, 512, 0} /* minor 12-15 */ 330 }}}, 331 }; 332 333 #define NOEJECT 0 334 #define EJECT 1 335 336 static void st_identify_drive(struct st_softc *, 337 struct scsipi_inquiry_pattern *); 338 static void st_loadquirks(struct st_softc *); 339 static int st_mount_tape(dev_t, int); 340 static void st_unmount(struct st_softc *, boolean); 341 static int st_decide_mode(struct st_softc *, boolean); 342 static void ststart(struct scsipi_periph *); 343 static void strestart(void *); 344 static void stdone(struct scsipi_xfer *, int); 345 static int st_read(struct st_softc *, char *, int, int); 346 static int st_space(struct st_softc *, int, u_int, int); 347 static int st_write_filemarks(struct st_softc *, int, int); 348 static int st_check_eod(struct st_softc *, boolean, int *, int); 349 static int st_load(struct st_softc *, u_int, int); 350 static int st_rewind(struct st_softc *, u_int, int); 351 static int st_interpret_sense(struct scsipi_xfer *); 352 static int st_touch_tape(struct st_softc *); 353 static int st_erase(struct st_softc *, int full, int flags); 354 static int st_rdpos(struct st_softc *, int, uint32_t *); 355 static int st_setpos(struct st_softc *, int, uint32_t *); 356 357 static const struct scsipi_periphsw st_switch = { 358 st_interpret_sense, 359 ststart, 360 NULL, 361 stdone 362 }; 363 364 #if defined(ST_ENABLE_EARLYWARN) 365 #define ST_INIT_FLAGS ST_EARLYWARN 366 #else 367 #define ST_INIT_FLAGS 0 368 #endif 369 370 /* 371 * The routine called by the low level scsi routine when it discovers 372 * A device suitable for this driver 373 */ 374 void 375 stattach(device_t parent, device_t self, void *aux) 376 { 377 struct st_softc *st = device_private(self); 378 struct scsipibus_attach_args *sa = aux; 379 struct scsipi_periph *periph = sa->sa_periph; 380 381 SC_DEBUG(periph, SCSIPI_DB2, ("stattach: ")); 382 st->sc_dev = self; 383 384 /* Store information needed to contact our base driver */ 385 st->sc_periph = periph; 386 periph->periph_dev = st->sc_dev; 387 periph->periph_switch = &st_switch; 388 389 /* Set initial flags */ 390 st->flags = ST_INIT_FLAGS; 391 392 /* Set up the buf queue for this device */ 393 bufq_alloc(&st->buf_queue, "fcfs", 0); 394 callout_init(&st->sc_callout, 0); 395 396 /* 397 * Check if the drive is a known criminal and take 398 * Any steps needed to bring it into line 399 */ 400 st_identify_drive(st, &sa->sa_inqbuf); 401 printf("\n"); 402 /* Use the subdriver to request information regarding the drive. */ 403 printf("%s : %s", device_xname(st->sc_dev), st->quirkdata 404 ? "quirks apply, " : ""); 405 if (scsipi_test_unit_ready(periph, 406 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE) || 407 st->ops(st, ST_OPS_MODESENSE, 408 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE)) 409 printf("drive empty\n"); 410 else { 411 printf("density code %d, ", st->media_density); 412 if (st->media_blksize > 0) 413 printf("%d-byte", st->media_blksize); 414 else 415 printf("variable"); 416 printf(" blocks, write-%s\n", 417 (st->flags & ST_READONLY) ? "protected" : "enabled"); 418 } 419 420 st->stats = iostat_alloc(IOSTAT_TAPE, parent, 421 device_xname(st->sc_dev)); 422 423 rnd_attach_source(&st->rnd_source, device_xname(st->sc_dev), 424 RND_TYPE_TAPE, 0); 425 } 426 427 int 428 stdetach(device_t self, int flags) 429 { 430 struct st_softc *st = device_private(self); 431 int s, bmaj, cmaj, mn; 432 433 /* locate the major number */ 434 bmaj = bdevsw_lookup_major(&st_bdevsw); 435 cmaj = cdevsw_lookup_major(&st_cdevsw); 436 437 /* kill any pending restart */ 438 callout_stop(&st->sc_callout); 439 440 s = splbio(); 441 442 /* Kill off any queued buffers. */ 443 bufq_drain(st->buf_queue); 444 445 bufq_free(st->buf_queue); 446 447 /* Kill off any pending commands. */ 448 scsipi_kill_pending(st->sc_periph); 449 450 splx(s); 451 452 /* Nuke the vnodes for any open instances */ 453 mn = STUNIT(device_unit(self)); 454 vdevgone(bmaj, mn, mn+STNMINOR-1, VBLK); 455 vdevgone(cmaj, mn, mn+STNMINOR-1, VCHR); 456 457 iostat_free(st->stats); 458 459 /* Unhook the entropy source. */ 460 rnd_detach_source(&st->rnd_source); 461 462 return 0; 463 } 464 465 /* 466 * Use the inquiry routine in 'scsi_base' to get drive info so we can 467 * Further tailor our behaviour. 468 */ 469 static void 470 st_identify_drive(struct st_softc *st, struct scsipi_inquiry_pattern *inqbuf) 471 { 472 const struct st_quirk_inquiry_pattern *finger; 473 int priority; 474 475 finger = scsipi_inqmatch(inqbuf, 476 st_quirk_patterns, 477 sizeof(st_quirk_patterns) / sizeof(st_quirk_patterns[0]), 478 sizeof(st_quirk_patterns[0]), &priority); 479 if (priority != 0) { 480 st->quirkdata = &finger->quirkdata; 481 st->drive_quirks = finger->quirkdata.quirks; 482 st->quirks = finger->quirkdata.quirks; /* start value */ 483 st->page_0_size = finger->quirkdata.page_0_size; 484 KASSERT(st->page_0_size <= MAX_PAGE_0_SIZE); 485 st_loadquirks(st); 486 } 487 } 488 489 /* 490 * initialise the subdevices to the default (QUIRK) state. 491 * this will remove any setting made by the system operator or previous 492 * operations. 493 */ 494 static void 495 st_loadquirks(struct st_softc *st) 496 { 497 const struct modes *mode; 498 struct modes *mode2; 499 int i; 500 501 mode = st->quirkdata->modes; 502 mode2 = st->modes; 503 for (i = 0; i < 4; i++) { 504 memset(mode2, 0, sizeof(struct modes)); 505 st->modeflags[i] &= ~(BLKSIZE_SET_BY_QUIRK | 506 DENSITY_SET_BY_QUIRK | BLKSIZE_SET_BY_USER | 507 DENSITY_SET_BY_USER); 508 if ((mode->quirks | st->drive_quirks) & ST_Q_FORCE_BLKSIZE) { 509 mode2->blksize = mode->blksize; 510 st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; 511 } 512 if (mode->density) { 513 mode2->density = mode->density; 514 st->modeflags[i] |= DENSITY_SET_BY_QUIRK; 515 } 516 mode2->quirks |= mode->quirks; 517 mode++; 518 mode2++; 519 } 520 } 521 522 /* open the device. */ 523 static int 524 stopen(dev_t dev, int flags, int mode, struct lwp *l) 525 { 526 u_int stmode, dsty; 527 int error, sflags, unit, tries, ntries; 528 struct st_softc *st; 529 struct scsipi_periph *periph; 530 struct scsipi_adapter *adapt; 531 532 unit = STUNIT(dev); 533 st = device_lookup_private(&st_cd, unit); 534 if (st == NULL) 535 return ENXIO; 536 537 stmode = STMODE(dev); 538 dsty = STDSTY(dev); 539 540 periph = st->sc_periph; 541 adapt = periph->periph_channel->chan_adapter; 542 543 SC_DEBUG(periph, SCSIPI_DB1, 544 ("open: dev=0x%"PRIx64" (unit %d (of %d))\n", dev, unit, 545 st_cd.cd_ndevs)); 546 547 /* Only allow one at a time */ 548 if (periph->periph_flags & PERIPH_OPEN) { 549 aprint_error_dev(st->sc_dev, "already open\n"); 550 return EBUSY; 551 } 552 553 if ((error = scsipi_adapter_addref(adapt)) != 0) 554 return error; 555 556 /* clear any latched errors. */ 557 st->mt_resid = 0; 558 st->mt_erreg = 0; 559 st->asc = 0; 560 st->ascq = 0; 561 562 /* 563 * Catch any unit attention errors. Be silent about this 564 * unless we're already mounted. We ignore media change 565 * if we're in control mode or not mounted yet. 566 */ 567 if ((st->flags & ST_MOUNTED) == 0 || stmode == CTRL_MODE) { 568 #ifdef SCSIDEBUG 569 sflags = XS_CTL_IGNORE_MEDIA_CHANGE; 570 #else 571 sflags = XS_CTL_SILENT|XS_CTL_IGNORE_MEDIA_CHANGE; 572 #endif 573 } else 574 sflags = 0; 575 576 /* 577 * If we're already mounted or we aren't configured for 578 * a mount delay, only try a test unit ready once. Otherwise, 579 * try up to ST_MOUNT_DELAY times with a rest interval of 580 * one second between each try. 581 */ 582 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0) 583 ntries = 1; 584 else 585 ntries = ST_MOUNT_DELAY; 586 587 for (error = tries = 0; tries < ntries; tries++) { 588 int slpintr, oflags; 589 590 /* 591 * If we had no error, or we're opening the control mode 592 * device, we jump out right away. 593 */ 594 error = scsipi_test_unit_ready(periph, sflags); 595 if (error == 0 || stmode == CTRL_MODE) 596 break; 597 598 /* 599 * We had an error. 600 * 601 * If we're already mounted or we aren't configured for 602 * a mount delay, or the error isn't a NOT READY error, 603 * skip to the error exit now. 604 */ 605 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0 || 606 (st->mt_key != SKEY_NOT_READY)) { 607 goto bad; 608 } 609 610 /* clear any latched errors. */ 611 st->mt_resid = 0; 612 st->mt_erreg = 0; 613 st->asc = 0; 614 st->ascq = 0; 615 616 /* 617 * Fake that we have the device open so 618 * we block other apps from getting in. 619 */ 620 oflags = periph->periph_flags; 621 periph->periph_flags |= PERIPH_OPEN; 622 623 slpintr = kpause("stload", true, hz, NULL); 624 625 periph->periph_flags = oflags; /* restore flags */ 626 if (slpintr != 0 && slpintr != EWOULDBLOCK) { 627 goto bad; 628 } 629 } 630 631 632 /* 633 * If the mode is 3 (e.g. minor = 3,7,11,15) then the device has 634 * been opened to set defaults and perform other, usually non-I/O 635 * related, operations. In this case, do a quick check to see 636 * whether the unit actually had a tape loaded (this will be known 637 * as to whether or not we got a NOT READY for the above 638 * unit attention). If a tape is there, go do a mount sequence. 639 */ 640 if (stmode == CTRL_MODE && st->mt_key == SKEY_NOT_READY) { 641 periph->periph_flags |= PERIPH_OPEN; 642 return 0; 643 } 644 645 /* 646 * If we get this far and had an error set, that means we failed 647 * to pass the 'test unit ready' test for the non-controlmode device, 648 * so we bounce the open. 649 */ 650 if (error) 651 return error; 652 653 /* Else, we're now committed to saying we're open. */ 654 periph->periph_flags |= PERIPH_OPEN; /* unit attn are now errors */ 655 656 /* 657 * If it's a different mode, or if the media has been 658 * invalidated, unmount the tape from the previous 659 * session but continue with open processing 660 */ 661 if (st->last_dsty != dsty || 662 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 663 st_unmount(st, NOEJECT); 664 665 /* 666 * If we are not mounted, then we should start a new 667 * mount session. 668 */ 669 if (!(st->flags & ST_MOUNTED)) { 670 if ((error = st_mount_tape(dev, flags)) != 0) 671 goto bad; 672 st->last_dsty = dsty; 673 } 674 if (!(st->quirks & ST_Q_NOPREVENT)) { 675 scsipi_prevent(periph, SPAMR_PREVENT_DT, 676 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 677 } 678 679 SC_DEBUG(periph, SCSIPI_DB2, ("open complete\n")); 680 return 0; 681 682 bad: 683 st_unmount(st, NOEJECT); 684 scsipi_adapter_delref(adapt); 685 periph->periph_flags &= ~PERIPH_OPEN; 686 return error; 687 } 688 689 static int 690 stclose(dev_t dev, int flags, int mode, struct lwp *l) 691 { 692 int stxx, error = 0; 693 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(dev)); 694 struct scsipi_periph *periph = st->sc_periph; 695 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 696 697 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("closing\n")); 698 699 /* 700 * Make sure that a tape opened in write-only mode will have 701 * file marks written on it when closed, even if not written to. 702 * 703 * This is for SUN compatibility. Actually, the Sun way of 704 * things is to: 705 * 706 * only write filemarks if there are fmks to be written and 707 * - open for write (possibly read/write) 708 * - the last operation was a write 709 * or: 710 * - opened for wronly 711 * - no data was written (including filemarks) 712 */ 713 714 stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); 715 if (((flags & FWRITE) && stxx == ST_WRITTEN) || 716 ((flags & O_ACCMODE) == FWRITE && stxx == 0)) { 717 int nm; 718 error = st_check_eod(st, FALSE, &nm, 0); 719 } 720 721 /* Allow robots to eject tape if needed. */ 722 scsipi_prevent(periph, SPAMR_ALLOW, 723 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 724 725 switch (STMODE(dev)) { 726 case NORMAL_MODE: 727 st_unmount(st, NOEJECT); 728 break; 729 case NOREW_MODE: 730 case CTRL_MODE: 731 /* 732 * Leave mounted unless media seems to have been removed. 733 * 734 * Otherwise, if we're to terminate a tape with more than one 735 * filemark [ and because we're not rewinding here ], backspace 736 * one filemark so that later appends will see an unbroken 737 * sequence of: 738 * 739 * file - FMK - file - FMK ... file - FMK FMK (EOM) 740 */ 741 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 742 st_unmount(st, NOEJECT); 743 } else if (error == 0) { 744 /* 745 * ST_WRITTEN was preserved from above. 746 * 747 * All we need to know here is: 748 * 749 * Were we writing this tape and was the last 750 * operation a write? 751 * 752 * Are there supposed to be 2FM at EOD? 753 * 754 * If both statements are true, then we backspace 755 * one filemark. 756 */ 757 stxx |= (st->flags & ST_2FM_AT_EOD); 758 if ((flags & FWRITE) != 0 && 759 (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { 760 error = st_space(st, -1, SP_FILEMARKS, 0); 761 } 762 } 763 break; 764 case EJECT_MODE: 765 st_unmount(st, EJECT); 766 break; 767 } 768 769 scsipi_wait_drain(periph); 770 771 scsipi_adapter_delref(adapt); 772 periph->periph_flags &= ~PERIPH_OPEN; 773 774 return error; 775 } 776 777 /* 778 * Start a new mount session. 779 * Copy in all the default parameters from the selected device mode. 780 * and try guess any that seem to be defaulted. 781 */ 782 static int 783 st_mount_tape(dev_t dev, int flags) 784 { 785 int unit; 786 u_int dsty; 787 struct st_softc *st; 788 struct scsipi_periph *periph; 789 int error = 0; 790 791 unit = STUNIT(dev); 792 dsty = STDSTY(dev); 793 st = device_lookup_private(&st_cd, unit); 794 periph = st->sc_periph; 795 796 if (st->flags & ST_MOUNTED) 797 return 0; 798 799 SC_DEBUG(periph, SCSIPI_DB1, ("mounting\n ")); 800 st->flags |= ST_NEW_MOUNT; 801 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 802 /* 803 * If the media is new, then make sure we give it a chance to 804 * to do a 'load' instruction. (We assume it is new.) 805 */ 806 if ((error = st_load(st, LD_LOAD, XS_CTL_SILENT)) != 0) 807 return error; 808 /* 809 * Throw another dummy instruction to catch 810 * 'Unit attention' errors. Many drives give 811 * these after doing a Load instruction (with 812 * the MEDIUM MAY HAVE CHANGED asc/ascq). 813 */ 814 scsipi_test_unit_ready(periph, XS_CTL_SILENT); /* XXX */ 815 816 /* 817 * Some devices can't tell you much until they have been 818 * asked to look at the media. This quirk does this. 819 */ 820 if (st->quirks & ST_Q_SENSE_HELP) 821 if ((error = st_touch_tape(st)) != 0) 822 return error; 823 /* 824 * Load the physical device parameters 825 * loads: blkmin, blkmax 826 */ 827 if ((error = st->ops(st, ST_OPS_RBL, 0)) != 0) 828 return error; 829 /* 830 * Load the media dependent parameters 831 * includes: media_blksize,media_density,numblks 832 * As we have a tape in, it should be reflected here. 833 * If not you may need the "quirk" above. 834 */ 835 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 836 return error; 837 /* 838 * If we have gained a permanent density from somewhere, 839 * then use it in preference to the one supplied by 840 * default by the driver. 841 */ 842 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 843 st->density = st->modes[dsty].density; 844 else 845 st->density = st->media_density; 846 /* 847 * If we have gained a permanent blocksize 848 * then use it in preference to the one supplied by 849 * default by the driver. 850 */ 851 st->flags &= ~ST_FIXEDBLOCKS; 852 if (st->modeflags[dsty] & 853 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 854 st->blksize = st->modes[dsty].blksize; 855 if (st->blksize) 856 st->flags |= ST_FIXEDBLOCKS; 857 } else { 858 if ((error = st_decide_mode(st, FALSE)) != 0) 859 return error; 860 } 861 if ((error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 862 /* ATAPI will return ENODEV for this, and this may be OK */ 863 if (error != ENODEV) { 864 aprint_error_dev(st->sc_dev, 865 "cannot set selected mode\n"); 866 return error; 867 } 868 } 869 st->flags &= ~ST_NEW_MOUNT; 870 st->flags |= ST_MOUNTED; 871 periph->periph_flags |= PERIPH_MEDIA_LOADED; /* move earlier? */ 872 st->blkno = st->fileno = (daddr_t) 0; 873 return 0; 874 } 875 876 /* 877 * End the present mount session. 878 * Rewind, and optionally eject the tape. 879 * Reset various flags to indicate that all new 880 * operations require another mount operation 881 */ 882 static void 883 st_unmount(struct st_softc *st, boolean eject) 884 { 885 struct scsipi_periph *periph = st->sc_periph; 886 int nmarks; 887 888 if ((st->flags & ST_MOUNTED) == 0) 889 return; 890 SC_DEBUG(periph, SCSIPI_DB1, ("unmounting\n")); 891 st_check_eod(st, FALSE, &nmarks, XS_CTL_IGNORE_NOT_READY); 892 st_rewind(st, 0, XS_CTL_IGNORE_NOT_READY); 893 894 /* 895 * Section 9.3.3 of the SCSI specs states that a device shall return 896 * the density value specified in the last succesfull MODE SELECT 897 * after an unload operation, in case it is not able to 898 * automatically determine the density of the new medium. 899 * 900 * So we instruct the device to use the default density, which will 901 * prevent the use of stale density values (in particular, 902 * in st_touch_tape(). 903 */ 904 st->density = 0; 905 if (st->ops(st, ST_OPS_MODESELECT, 0) != 0) { 906 aprint_error_dev(st->sc_dev, 907 "WARNING: cannot revert to default density\n"); 908 } 909 910 if (eject) { 911 if (!(st->quirks & ST_Q_NOPREVENT)) { 912 scsipi_prevent(periph, SPAMR_ALLOW, 913 XS_CTL_IGNORE_ILLEGAL_REQUEST | 914 XS_CTL_IGNORE_NOT_READY); 915 } 916 st_load(st, LD_UNLOAD, XS_CTL_IGNORE_NOT_READY); 917 st->blkno = st->fileno = (daddr_t) -1; 918 } else { 919 st->blkno = st->fileno = (daddr_t) 0; 920 } 921 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 922 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 923 } 924 925 /* 926 * Given all we know about the device, media, mode, 'quirks' and 927 * initial operation, make a decision as to how we should be set 928 * to run (regarding blocking and EOD marks) 929 */ 930 int 931 st_decide_mode(struct st_softc *st, boolean first_read) 932 { 933 934 SC_DEBUG(st->sc_periph, SCSIPI_DB2, ("starting block mode decision\n")); 935 936 /* 937 * If the drive can only handle fixed-length blocks and only at 938 * one size, perhaps we should just do that. 939 */ 940 if (st->blkmin && (st->blkmin == st->blkmax)) { 941 st->flags |= ST_FIXEDBLOCKS; 942 st->blksize = st->blkmin; 943 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 944 ("blkmin == blkmax of %d\n", st->blkmin)); 945 goto done; 946 } 947 /* 948 * If the tape density mandates (or even suggests) use of fixed 949 * or variable-length blocks, comply. 950 */ 951 switch (st->density) { 952 case HALFINCH_800: 953 case HALFINCH_1600: 954 case HALFINCH_6250: 955 case DDS: 956 st->flags &= ~ST_FIXEDBLOCKS; 957 st->blksize = 0; 958 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 959 ("density specified variable\n")); 960 goto done; 961 case QIC_11: 962 case QIC_24: 963 case QIC_120: 964 case QIC_150: 965 case QIC_525: 966 case QIC_1320: 967 case QIC_3095: 968 case QIC_3220: 969 st->flags |= ST_FIXEDBLOCKS; 970 if (st->media_blksize > 0) 971 st->blksize = st->media_blksize; 972 else 973 st->blksize = DEF_FIXED_BSIZE; 974 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 975 ("density specified fixed\n")); 976 goto done; 977 } 978 /* 979 * If we're about to read the tape, perhaps we should choose 980 * fixed or variable-length blocks and block size according to 981 * what the drive found on the tape. 982 */ 983 if (first_read && 984 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 985 (st->media_blksize == DEF_FIXED_BSIZE) || 986 (st->media_blksize == 1024))) { 987 if (st->media_blksize > 0) 988 st->flags |= ST_FIXEDBLOCKS; 989 else 990 st->flags &= ~ST_FIXEDBLOCKS; 991 st->blksize = st->media_blksize; 992 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 993 ("Used media_blksize of %d\n", st->media_blksize)); 994 goto done; 995 } 996 /* 997 * We're getting no hints from any direction. Choose variable- 998 * length blocks arbitrarily. 999 */ 1000 st->flags &= ~ST_FIXEDBLOCKS; 1001 st->blksize = 0; 1002 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1003 ("Give up and default to variable mode\n")); 1004 1005 done: 1006 /* 1007 * Decide whether or not to write two file marks to signify end- 1008 * of-data. Make the decision as a function of density. If 1009 * the decision is not to use a second file mark, the SCSI BLANK 1010 * CHECK condition code will be recognized as end-of-data when 1011 * first read. 1012 * (I think this should be a by-product of fixed/variable..julian) 1013 */ 1014 switch (st->density) { 1015 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 1016 case QIC_11: 1017 case QIC_24: 1018 case QIC_120: 1019 case QIC_150: 1020 case QIC_525: 1021 case QIC_1320: 1022 case QIC_3095: 1023 case QIC_3220: 1024 st->flags &= ~ST_2FM_AT_EOD; 1025 break; 1026 default: 1027 st->flags |= ST_2FM_AT_EOD; 1028 } 1029 return 0; 1030 } 1031 1032 /* 1033 * Actually translate the requested transfer into 1034 * one the physical driver can understand 1035 * The transfer is described by a buf and will include 1036 * only one physical transfer. 1037 */ 1038 static void 1039 ststrategy(struct buf *bp) 1040 { 1041 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(bp->b_dev)); 1042 int s; 1043 1044 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1045 ("ststrategy %d bytes @ blk %" PRId64 "\n", bp->b_bcount, 1046 bp->b_blkno)); 1047 /* If it's a null transfer, return immediately */ 1048 if (bp->b_bcount == 0) 1049 goto abort; 1050 1051 /* If offset is negative, error */ 1052 if (bp->b_blkno < 0) { 1053 bp->b_error = EINVAL; 1054 goto abort; 1055 } 1056 1057 /* Odd sized request on fixed drives are verboten */ 1058 if (st->flags & ST_FIXEDBLOCKS) { 1059 if (bp->b_bcount % st->blksize) { 1060 aprint_error_dev(st->sc_dev, "bad request, must be multiple of %d\n", 1061 st->blksize); 1062 bp->b_error = EIO; 1063 goto abort; 1064 } 1065 } 1066 /* as are out-of-range requests on variable drives. */ 1067 else if (bp->b_bcount < st->blkmin || 1068 (st->blkmax && bp->b_bcount > st->blkmax)) { 1069 aprint_error_dev(st->sc_dev, "bad request, must be between %d and %d\n", 1070 st->blkmin, st->blkmax); 1071 bp->b_error = EIO; 1072 goto abort; 1073 } 1074 s = splbio(); 1075 1076 /* 1077 * Place it in the queue of activities for this tape 1078 * at the end (a bit silly because we only have on user.. 1079 * (but it could fork())) 1080 */ 1081 bufq_put(st->buf_queue, bp); 1082 1083 /* 1084 * Tell the device to get going on the transfer if it's 1085 * not doing anything, otherwise just wait for completion 1086 * (All a bit silly if we're only allowing 1 open but..) 1087 */ 1088 ststart(st->sc_periph); 1089 1090 splx(s); 1091 return; 1092 abort: 1093 /* 1094 * Reset the residue because we didn't do anything, 1095 * and send the buffer back as done. 1096 */ 1097 bp->b_resid = bp->b_bcount; 1098 biodone(bp); 1099 return; 1100 } 1101 1102 /* 1103 * ststart looks to see if there is a buf waiting for the device 1104 * and that the device is not already busy. If both are true, 1105 * It dequeues the buf and creates a scsi command to perform the 1106 * transfer required. The transfer request will call scsipi_done 1107 * on completion, which will in turn call this routine again 1108 * so that the next queued transfer is performed. 1109 * The bufs are queued by the strategy routine (ststrategy) 1110 * 1111 * This routine is also called after other non-queued requests 1112 * have been made of the scsi driver, to ensure that the queue 1113 * continues to be drained. 1114 * ststart() is called at splbio 1115 */ 1116 static void 1117 ststart(struct scsipi_periph *periph) 1118 { 1119 struct st_softc *st = device_private(periph->periph_dev); 1120 struct buf *bp; 1121 struct scsi_rw_tape cmd; 1122 struct scsipi_xfer *xs; 1123 int flags, error __diagused; 1124 1125 SC_DEBUG(periph, SCSIPI_DB2, ("ststart ")); 1126 /* See if there is a buf to do and we are not already doing one */ 1127 while (periph->periph_active < periph->periph_openings) { 1128 /* if a special awaits, let it proceed first */ 1129 if (periph->periph_flags & PERIPH_WAITING) { 1130 periph->periph_flags &= ~PERIPH_WAITING; 1131 wakeup((void *)periph); 1132 return; 1133 } 1134 1135 /* 1136 * If the device has been unmounted by the user 1137 * then throw away all requests until done. 1138 */ 1139 if (__predict_false((st->flags & ST_MOUNTED) == 0 || 1140 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0)) { 1141 if ((bp = bufq_get(st->buf_queue)) != NULL) { 1142 /* make sure that one implies the other.. */ 1143 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 1144 bp->b_error = EIO; 1145 bp->b_resid = bp->b_bcount; 1146 biodone(bp); 1147 continue; 1148 } else 1149 return; 1150 } 1151 1152 if ((bp = bufq_peek(st->buf_queue)) == NULL) 1153 return; 1154 1155 iostat_busy(st->stats); 1156 1157 /* 1158 * only FIXEDBLOCK devices have pending I/O or space operations. 1159 */ 1160 if (st->flags & ST_FIXEDBLOCKS) { 1161 /* 1162 * If we are at a filemark but have not reported it yet 1163 * then we should report it now 1164 */ 1165 if (st->flags & ST_AT_FILEMARK) { 1166 if ((bp->b_flags & B_READ) == B_WRITE) { 1167 /* 1168 * Handling of ST_AT_FILEMARK in 1169 * st_space will fill in the right file 1170 * mark count. 1171 * Back up over filemark 1172 */ 1173 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1174 bufq_get(st->buf_queue); 1175 bp->b_error = EIO; 1176 bp->b_resid = bp->b_bcount; 1177 biodone(bp); 1178 continue; 1179 } 1180 } else { 1181 bufq_get(st->buf_queue); 1182 bp->b_resid = bp->b_bcount; 1183 bp->b_error = 0; 1184 st->flags &= ~ST_AT_FILEMARK; 1185 biodone(bp); 1186 continue; /* seek more work */ 1187 } 1188 } 1189 } 1190 /* 1191 * If we are at EOM but have not reported it 1192 * yet then we should report it now. 1193 */ 1194 if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { 1195 bufq_get(st->buf_queue); 1196 bp->b_resid = bp->b_bcount; 1197 if (st->flags & ST_EIO_PENDING) 1198 bp->b_error = EIO; 1199 st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); 1200 biodone(bp); 1201 continue; /* seek more work */ 1202 } 1203 1204 /* Fill out the scsi command */ 1205 memset(&cmd, 0, sizeof(cmd)); 1206 flags = XS_CTL_NOSLEEP | XS_CTL_ASYNC; 1207 if ((bp->b_flags & B_READ) == B_WRITE) { 1208 cmd.opcode = WRITE; 1209 st->flags &= ~ST_FM_WRITTEN; 1210 flags |= XS_CTL_DATA_OUT; 1211 } else { 1212 cmd.opcode = READ; 1213 flags |= XS_CTL_DATA_IN; 1214 } 1215 1216 /* 1217 * Handle "fixed-block-mode" tape drives by using the 1218 * block count instead of the length. 1219 */ 1220 if (st->flags & ST_FIXEDBLOCKS) { 1221 cmd.byte2 |= SRW_FIXED; 1222 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1223 } else 1224 _lto3b(bp->b_bcount, cmd.len); 1225 1226 /* Clear 'position updated' indicator */ 1227 st->flags &= ~ST_POSUPDATED; 1228 1229 /* go ask the adapter to do all this for us */ 1230 xs = scsipi_make_xs(periph, 1231 (struct scsipi_generic *)&cmd, sizeof(cmd), 1232 (u_char *)bp->b_data, bp->b_bcount, 1233 0, ST_IO_TIME, bp, flags); 1234 if (__predict_false(xs == NULL)) { 1235 /* 1236 * out of memory. Keep this buffer in the queue, and 1237 * retry later. 1238 */ 1239 callout_reset(&st->sc_callout, hz / 2, strestart, 1240 periph); 1241 return; 1242 } 1243 /* 1244 * need to dequeue the buffer before queuing the command, 1245 * because cdstart may be called recursively from the 1246 * HBA driver 1247 */ 1248 #ifdef DIAGNOSTIC 1249 if (bufq_get(st->buf_queue) != bp) 1250 panic("ststart(): dequeued wrong buf"); 1251 #else 1252 bufq_get(st->buf_queue); 1253 #endif 1254 error = scsipi_execute_xs(xs); 1255 /* with a scsipi_xfer preallocated, scsipi_command can't fail */ 1256 KASSERT(error == 0); 1257 } /* go back and see if we can cram more work in.. */ 1258 } 1259 1260 static void 1261 strestart(void *v) 1262 { 1263 int s = splbio(); 1264 ststart((struct scsipi_periph *)v); 1265 splx(s); 1266 } 1267 1268 static void 1269 stdone(struct scsipi_xfer *xs, int error) 1270 { 1271 struct st_softc *st = device_private(xs->xs_periph->periph_dev); 1272 struct buf *bp = xs->bp; 1273 1274 if (bp) { 1275 bp->b_error = error; 1276 bp->b_resid = xs->resid; 1277 /* 1278 * buggy device ? A SDLT320 can report an info 1279 * field of 0x3de8000 on a Media Error/Write Error 1280 * for this CBD: 0x0a 00 00 80 00 00 1281 */ 1282 if (bp->b_resid > bp->b_bcount || bp->b_resid < 0) 1283 bp->b_resid = bp->b_bcount; 1284 1285 if ((bp->b_flags & B_READ) == B_WRITE) 1286 st->flags |= ST_WRITTEN; 1287 else 1288 st->flags &= ~ST_WRITTEN; 1289 1290 iostat_unbusy(st->stats, bp->b_bcount, 1291 ((bp->b_flags & B_READ) == B_READ)); 1292 1293 rnd_add_uint32(&st->rnd_source, bp->b_blkno); 1294 1295 if ((st->flags & ST_POSUPDATED) == 0) { 1296 if (error) { 1297 st->fileno = st->blkno = -1; 1298 } else if (st->blkno != -1) { 1299 if (st->flags & ST_FIXEDBLOCKS) 1300 st->blkno += 1301 (bp->b_bcount / st->blksize); 1302 else 1303 st->blkno++; 1304 } 1305 } 1306 biodone(bp); 1307 } 1308 } 1309 1310 static int 1311 stread(dev_t dev, struct uio *uio, int iomode) 1312 { 1313 struct st_softc *st = device_lookup_private(&st_cd, STUNIT(dev)); 1314 1315 return physio(ststrategy, NULL, dev, B_READ, 1316 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio); 1317 } 1318 1319 static int 1320 stwrite(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_WRITE, 1325 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio); 1326 } 1327 1328 /* 1329 * Perform special action on behalf of the user; 1330 * knows about the internals of this device 1331 */ 1332 static int 1333 stioctl(dev_t dev, u_long cmd, void *arg, int flag, struct lwp *l) 1334 { 1335 int error = 0; 1336 int unit; 1337 int number, nmarks, dsty; 1338 int flags; 1339 struct st_softc *st; 1340 int hold_blksize; 1341 uint8_t hold_density; 1342 struct mtop *mt = (struct mtop *) arg; 1343 1344 /* Find the device that the user is talking about */ 1345 flags = 0; /* give error messages, act on errors etc. */ 1346 unit = STUNIT(dev); 1347 dsty = STDSTY(dev); 1348 st = device_lookup_private(&st_cd, unit); 1349 hold_blksize = st->blksize; 1350 hold_density = st->density; 1351 1352 switch ((u_int)cmd) { 1353 case MTIOCGET: { 1354 struct mtget *g = (struct mtget *) arg; 1355 /* 1356 * (to get the current state of READONLY) 1357 */ 1358 error = st->ops(st, ST_OPS_MODESENSE, XS_CTL_SILENT); 1359 if (error) { 1360 /* 1361 * Ignore the error if in control mode; 1362 * this is mandated by st(4). 1363 */ 1364 if (STMODE(dev) != CTRL_MODE) 1365 break; 1366 error = 0; 1367 } 1368 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("[ioctl: get status]\n")); 1369 memset(g, 0, sizeof(struct mtget)); 1370 g->mt_type = MT_ISAR; /* Ultrix compat *//*? */ 1371 g->mt_blksiz = st->blksize; 1372 g->mt_density = st->density; 1373 g->mt_mblksiz[0] = st->modes[0].blksize; 1374 g->mt_mblksiz[1] = st->modes[1].blksize; 1375 g->mt_mblksiz[2] = st->modes[2].blksize; 1376 g->mt_mblksiz[3] = st->modes[3].blksize; 1377 g->mt_mdensity[0] = st->modes[0].density; 1378 g->mt_mdensity[1] = st->modes[1].density; 1379 g->mt_mdensity[2] = st->modes[2].density; 1380 g->mt_mdensity[3] = st->modes[3].density; 1381 g->mt_fileno = st->fileno; 1382 g->mt_blkno = st->blkno; 1383 if (st->flags & ST_READONLY) 1384 g->mt_dsreg |= MT_DS_RDONLY; 1385 if (st->flags & ST_MOUNTED) 1386 g->mt_dsreg |= MT_DS_MOUNTED; 1387 g->mt_resid = st->mt_resid; 1388 g->mt_erreg = st->mt_erreg; 1389 /* 1390 * clear latched errors. 1391 */ 1392 st->mt_resid = 0; 1393 st->mt_erreg = 0; 1394 st->asc = 0; 1395 st->ascq = 0; 1396 break; 1397 } 1398 case MTIOCTOP: { 1399 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1400 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1401 mt->mt_count)); 1402 1403 /* compat: in U*x it is a short */ 1404 number = mt->mt_count; 1405 switch ((short) (mt->mt_op)) { 1406 case MTWEOF: /* write an end-of-file record */ 1407 error = st_write_filemarks(st, number, flags); 1408 break; 1409 case MTBSF: /* backward space file */ 1410 number = -number; 1411 case MTFSF: /* forward space file */ 1412 error = st_check_eod(st, FALSE, &nmarks, flags); 1413 if (!error) 1414 error = st_space(st, number - nmarks, 1415 SP_FILEMARKS, flags); 1416 break; 1417 case MTBSR: /* backward space record */ 1418 number = -number; 1419 case MTFSR: /* forward space record */ 1420 error = st_check_eod(st, true, &nmarks, flags); 1421 if (!error) 1422 error = st_space(st, number, SP_BLKS, flags); 1423 break; 1424 case MTREW: /* rewind */ 1425 error = st_rewind(st, 0, flags); 1426 break; 1427 case MTOFFL: /* rewind and put the drive offline */ 1428 st_unmount(st, EJECT); 1429 break; 1430 case MTNOP: /* no operation, sets status only */ 1431 break; 1432 case MTRETEN: /* retension the tape */ 1433 error = st_load(st, LD_RETENSION, flags); 1434 if (!error) 1435 error = st_load(st, LD_LOAD, flags); 1436 break; 1437 case MTEOM: /* forward space to end of media */ 1438 error = st_check_eod(st, FALSE, &nmarks, flags); 1439 if (!error) 1440 error = st_space(st, 1, SP_EOM, flags); 1441 break; 1442 case MTCACHE: /* enable controller cache */ 1443 st->flags &= ~ST_DONTBUFFER; 1444 goto try_new_value; 1445 case MTNOCACHE: /* disable controller cache */ 1446 st->flags |= ST_DONTBUFFER; 1447 goto try_new_value; 1448 case MTERASE: /* erase volume */ 1449 error = st_erase(st, number, flags); 1450 break; 1451 case MTSETBSIZ: /* Set block size for device */ 1452 #ifdef NOTYET 1453 if (!(st->flags & ST_NEW_MOUNT)) { 1454 uprintf("re-mount tape before changing " 1455 "blocksize"); 1456 error = EINVAL; 1457 break; 1458 } 1459 #endif 1460 if (number == 0) 1461 st->flags &= ~ST_FIXEDBLOCKS; 1462 else { 1463 if ((st->blkmin || st->blkmax) && 1464 (number < st->blkmin || 1465 number > st->blkmax)) { 1466 error = EINVAL; 1467 break; 1468 } 1469 st->flags |= ST_FIXEDBLOCKS; 1470 } 1471 st->blksize = number; 1472 st->flags |= ST_BLOCK_SET; /*XXX */ 1473 goto try_new_value; 1474 case MTSETDNSTY: /* Set density for device and mode */ 1475 /* 1476 * Any number >= 0 and <= 0xff is legal. Numbers 1477 * above 0x80 are 'vendor unique'. 1478 */ 1479 if (number < 0 || number > 255) { 1480 error = EINVAL; 1481 break; 1482 } else 1483 st->density = number; 1484 goto try_new_value; 1485 case MTCMPRESS: 1486 error = st->ops(st, (number == 0) ? 1487 ST_OPS_CMPRSS_OFF : ST_OPS_CMPRSS_ON, 1488 XS_CTL_SILENT); 1489 break; 1490 case MTEWARN: 1491 if (number) 1492 st->flags |= ST_EARLYWARN; 1493 else 1494 st->flags &= ~ST_EARLYWARN; 1495 break; 1496 1497 default: 1498 error = EINVAL; 1499 } 1500 break; 1501 } 1502 case MTIOCIEOT: 1503 case MTIOCEEOT: 1504 break; 1505 case MTIOCRDSPOS: 1506 error = st_rdpos(st, 0, (uint32_t *)arg); 1507 break; 1508 case MTIOCRDHPOS: 1509 error = st_rdpos(st, 1, (uint32_t *)arg); 1510 break; 1511 case MTIOCSLOCATE: 1512 error = st_setpos(st, 0, (uint32_t *)arg); 1513 break; 1514 case MTIOCHLOCATE: 1515 error = st_setpos(st, 1, (uint32_t *)arg); 1516 break; 1517 default: 1518 error = scsipi_do_ioctl(st->sc_periph, dev, cmd, arg, flag, l); 1519 break; 1520 } 1521 return error; 1522 1523 try_new_value: 1524 /* 1525 * Check that the mode being asked for is aggreeable to the 1526 * drive. If not, put it back the way it was. 1527 * 1528 * If in control mode, we can make (persistent) mode changes 1529 * even if no medium is loaded (see st(4)). 1530 */ 1531 if ((STMODE(dev) != CTRL_MODE || (st->flags & ST_MOUNTED) != 0) && 1532 (error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 1533 /* put it back as it was */ 1534 aprint_error_dev(st->sc_dev, "cannot set selected mode\n"); 1535 st->density = hold_density; 1536 st->blksize = hold_blksize; 1537 if (st->blksize) 1538 st->flags |= ST_FIXEDBLOCKS; 1539 else 1540 st->flags &= ~ST_FIXEDBLOCKS; 1541 return error; 1542 } 1543 /* 1544 * As the drive liked it, if we are setting a new default, 1545 * set it into the structures as such. 1546 * 1547 * The means for deciding this are not finalised yet- but 1548 * if the device was opened in Control Mode, the values 1549 * are persistent now across mounts. 1550 */ 1551 if (STMODE(dev) == CTRL_MODE) { 1552 switch ((short) (mt->mt_op)) { 1553 case MTSETBSIZ: 1554 st->modes[dsty].blksize = st->blksize; 1555 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1556 break; 1557 case MTSETDNSTY: 1558 st->modes[dsty].density = st->density; 1559 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1560 break; 1561 } 1562 } 1563 return 0; 1564 } 1565 1566 /* Do a synchronous read. */ 1567 static int 1568 st_read(struct st_softc *st, char *bf, int size, int flags) 1569 { 1570 struct scsi_rw_tape cmd; 1571 1572 /* If it's a null transfer, return immediatly */ 1573 if (size == 0) 1574 return 0; 1575 memset(&cmd, 0, sizeof(cmd)); 1576 cmd.opcode = READ; 1577 if (st->flags & ST_FIXEDBLOCKS) { 1578 cmd.byte2 |= SRW_FIXED; 1579 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1580 cmd.len); 1581 } else 1582 _lto3b(size, cmd.len); 1583 return scsipi_command(st->sc_periph, 1584 (void *)&cmd, sizeof(cmd), (void *)bf, size, 0, ST_IO_TIME, NULL, 1585 flags | XS_CTL_DATA_IN); 1586 } 1587 1588 /* issue an erase command */ 1589 static int 1590 st_erase(struct st_softc *st, int full, int flags) 1591 { 1592 int tmo; 1593 struct scsi_erase cmd; 1594 1595 /* 1596 * Full erase means set LONG bit in erase command, which asks 1597 * the drive to erase the entire unit. Without this bit, we're 1598 * asking the drive to write an erase gap. 1599 */ 1600 memset(&cmd, 0, sizeof(cmd)); 1601 cmd.opcode = ERASE; 1602 if (full) { 1603 cmd.byte2 = SE_LONG; 1604 tmo = ST_SPC_TIME; 1605 } else 1606 tmo = ST_IO_TIME; 1607 1608 /* 1609 * XXX We always do this asynchronously, for now, unless the device 1610 * has the ST_Q_ERASE_NOIMM quirk. How long should we wait if we 1611 * want to (eventually) to it synchronously? 1612 */ 1613 if ((st->quirks & ST_Q_ERASE_NOIMM) == 0) 1614 cmd.byte2 |= SE_IMMED; 1615 1616 return scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1617 ST_RETRIES, tmo, NULL, flags); 1618 } 1619 1620 /* skip N blocks/filemarks/seq filemarks/eom */ 1621 static int 1622 st_space(struct st_softc *st, int number, u_int what, int flags) 1623 { 1624 struct scsi_space cmd; 1625 int error; 1626 1627 switch (what) { 1628 case SP_BLKS: 1629 if (st->flags & ST_PER_ACTION) { 1630 if (number > 0) { 1631 st->flags &= ~ST_PER_ACTION; 1632 return EIO; 1633 } else if (number < 0) { 1634 if (st->flags & ST_AT_FILEMARK) { 1635 /* 1636 * Handling of ST_AT_FILEMARK 1637 * in st_space will fill in the 1638 * right file mark count. 1639 */ 1640 error = st_space(st, 0, SP_FILEMARKS, 1641 flags); 1642 if (error) 1643 return error; 1644 } 1645 if (st->flags & ST_BLANK_READ) { 1646 st->flags &= ~ST_BLANK_READ; 1647 return EIO; 1648 } 1649 st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); 1650 } 1651 } 1652 break; 1653 case SP_FILEMARKS: 1654 if (st->flags & ST_EIO_PENDING) { 1655 if (number > 0) { 1656 /* pretend we just discovered the error */ 1657 st->flags &= ~ST_EIO_PENDING; 1658 return EIO; 1659 } else if (number < 0) { 1660 /* back away from the error */ 1661 st->flags &= ~ST_EIO_PENDING; 1662 } 1663 } 1664 if (st->flags & ST_AT_FILEMARK) { 1665 st->flags &= ~ST_AT_FILEMARK; 1666 number--; 1667 } 1668 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 1669 /* back away from unwritten tape */ 1670 st->flags &= ~ST_BLANK_READ; 1671 number++; /* XXX dubious */ 1672 } 1673 break; 1674 case SP_EOM: 1675 if (st->flags & ST_EOM_PENDING) { 1676 /* we're already there */ 1677 st->flags &= ~ST_EOM_PENDING; 1678 return 0; 1679 } 1680 if (st->flags & ST_EIO_PENDING) { 1681 /* pretend we just discovered the error */ 1682 st->flags &= ~ST_EIO_PENDING; 1683 return EIO; 1684 } 1685 if (st->flags & ST_AT_FILEMARK) 1686 st->flags &= ~ST_AT_FILEMARK; 1687 break; 1688 } 1689 if (number == 0) 1690 return 0; 1691 1692 memset(&cmd, 0, sizeof(cmd)); 1693 cmd.opcode = SPACE; 1694 cmd.byte2 = what; 1695 _lto3b(number, cmd.number); 1696 1697 st->flags &= ~ST_POSUPDATED; 1698 st->last_ctl_resid = 0; 1699 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1700 0, ST_SPC_TIME, NULL, flags); 1701 1702 if (error == 0 && (st->flags & ST_POSUPDATED) == 0) { 1703 number = number - st->last_ctl_resid; 1704 if (what == SP_BLKS) { 1705 if (st->blkno != -1) 1706 st->blkno += number; 1707 } else if (what == SP_FILEMARKS) { 1708 if (st->fileno != -1) { 1709 st->fileno += number; 1710 if (number > 0) 1711 st->blkno = 0; 1712 else if (number < 0) 1713 st->blkno = -1; 1714 } 1715 } else if (what == SP_EOM) { 1716 /* This loses us relative position. */ 1717 st->fileno = st->blkno = -1; 1718 } 1719 } 1720 return error; 1721 } 1722 1723 /* 1724 * write N filemarks 1725 */ 1726 static int 1727 st_write_filemarks(struct st_softc *st, int number, int flags) 1728 { 1729 int error; 1730 struct scsi_write_filemarks cmd; 1731 1732 /* 1733 * It's hard to write a negative number of file marks. 1734 * Don't try. 1735 */ 1736 if (number < 0) 1737 return EINVAL; 1738 switch (number) { 1739 case 0: /* really a command to sync the drive's buffers */ 1740 break; 1741 case 1: 1742 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 1743 st->flags &= ~ST_WRITTEN; 1744 else 1745 st->flags |= ST_FM_WRITTEN; 1746 st->flags &= ~ST_PER_ACTION; 1747 break; 1748 default: 1749 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 1750 } 1751 1752 memset(&cmd, 0, sizeof(cmd)); 1753 cmd.opcode = WRITE_FILEMARKS; 1754 if (SCSIPI_BUSTYPE_TYPE(scsipi_periph_bustype(st->sc_periph)) == 1755 SCSIPI_BUSTYPE_ATAPI) 1756 cmd.byte2 = SR_IMMED; 1757 /* 1758 * The ATAPI Onstream DI-30 doesn't support writing filemarks, but 1759 * WRITE_FILEMARKS is still used to flush the buffer 1760 */ 1761 if ((st->quirks & ST_Q_NOFILEMARKS) == 0) 1762 _lto3b(number, cmd.number); 1763 1764 /* XXX WE NEED TO BE ABLE TO GET A RESIDIUAL XXX */ 1765 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1766 0, ST_IO_TIME * 4, NULL, flags); 1767 if (error == 0 && st->fileno != -1) 1768 st->fileno += number; 1769 return error; 1770 } 1771 1772 /* 1773 * Make sure the right number of file marks is on tape if the 1774 * tape has been written. If the position argument is true, 1775 * leave the tape positioned where it was originally. 1776 * 1777 * nmarks returns the number of marks to skip (or, if position 1778 * true, which were skipped) to get back original position. 1779 */ 1780 static int 1781 st_check_eod(struct st_softc *st, boolean position, int *nmarks, int flags) 1782 { 1783 int error; 1784 1785 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 1786 default: 1787 *nmarks = 0; 1788 return 0; 1789 case ST_WRITTEN: 1790 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 1791 *nmarks = 1; 1792 break; 1793 case ST_WRITTEN | ST_2FM_AT_EOD: 1794 *nmarks = 2; 1795 } 1796 error = st_write_filemarks(st, *nmarks, flags); 1797 if (position && !error) 1798 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 1799 return error; 1800 } 1801 1802 /* load/unload/retension */ 1803 static int 1804 st_load(struct st_softc *st, u_int type, int flags) 1805 { 1806 int error; 1807 struct scsi_load cmd; 1808 1809 if (type != LD_LOAD) { 1810 int nmarks; 1811 1812 error = st_check_eod(st, FALSE, &nmarks, flags); 1813 if (error) { 1814 aprint_error_dev(st->sc_dev, 1815 "failed to write closing filemarks at " 1816 "unload, errno=%d\n", error); 1817 return error; 1818 } 1819 } 1820 if (st->quirks & ST_Q_IGNORE_LOADS) { 1821 if (type == LD_LOAD) 1822 /* 1823 * If we ignore loads, at least we should try a rewind. 1824 */ 1825 return st_rewind(st, 0, flags); 1826 /* otherwise, we should do what's asked of us */ 1827 } 1828 1829 memset(&cmd, 0, sizeof(cmd)); 1830 cmd.opcode = LOAD; 1831 if (SCSIPI_BUSTYPE_TYPE(scsipi_periph_bustype(st->sc_periph)) == 1832 SCSIPI_BUSTYPE_ATAPI) 1833 cmd.byte2 = SR_IMMED; 1834 cmd.how = type; 1835 1836 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1837 ST_RETRIES, ST_SPC_TIME, NULL, flags); 1838 if (error) { 1839 aprint_error_dev(st->sc_dev, "error %d in st_load (op %d)\n", 1840 error, type); 1841 } 1842 return error; 1843 } 1844 1845 /* Rewind the device */ 1846 static int 1847 st_rewind(struct st_softc *st, u_int immediate, int flags) 1848 { 1849 struct scsi_rewind cmd; 1850 int error; 1851 int nmarks; 1852 int timeout; 1853 1854 error = st_check_eod(st, FALSE, &nmarks, flags); 1855 if (error) { 1856 aprint_error_dev(st->sc_dev, 1857 "failed to write closing filemarks at " 1858 "rewind, errno=%d\n", error); 1859 return error; 1860 } 1861 st->flags &= ~ST_PER_ACTION; 1862 1863 /* If requestor asked for immediate response, set a short timeout */ 1864 timeout = immediate ? ST_CTL_TIME : ST_SPC_TIME; 1865 1866 /* ATAPI tapes always need immediate to be set */ 1867 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1868 immediate = SR_IMMED; 1869 1870 memset(&cmd, 0, sizeof(cmd)); 1871 cmd.opcode = REWIND; 1872 cmd.byte2 = immediate; 1873 1874 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1875 ST_RETRIES, timeout, NULL, flags); 1876 if (error) { 1877 aprint_error_dev(st->sc_dev, "error %d trying to rewind\n", 1878 error); 1879 /* lost position */ 1880 st->fileno = st->blkno = -1; 1881 } else 1882 st->fileno = st->blkno = 0; 1883 return error; 1884 } 1885 1886 static int 1887 st_rdpos(struct st_softc *st, int hard, uint32_t *blkptr) 1888 { 1889 int error; 1890 uint8_t posdata[20]; 1891 struct scsi_tape_read_position cmd; 1892 1893 /* 1894 * We try and flush any buffered writes here if we were writing 1895 * and we're trying to get hardware block position. It eats 1896 * up performance substantially, but I'm wary of drive firmware. 1897 * 1898 * I think that *logical* block position is probably okay- 1899 * but hardware block position might have to wait for data 1900 * to hit media to be valid. Caveat Emptor. 1901 */ 1902 1903 if (hard && (st->flags & ST_WRITTEN)) { 1904 /* First flush any pending writes... */ 1905 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 1906 /* 1907 * The latter case is for 'write protected' tapes 1908 * which are too stupid to recognize a zero count 1909 * for writing filemarks as a no-op. 1910 */ 1911 if (error != 0 && error != EACCES && error != EROFS) 1912 return error; 1913 } 1914 1915 memset(&cmd, 0, sizeof(cmd)); 1916 memset(&posdata, 0, sizeof(posdata)); 1917 cmd.opcode = READ_POSITION; 1918 if (hard) 1919 cmd.byte1 = 1; 1920 1921 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 1922 (void *)&posdata, sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, 1923 XS_CTL_SILENT | XS_CTL_DATA_IN); 1924 1925 if (error == 0) { 1926 #if 0 1927 printf("posdata:"); 1928 for (hard = 0; hard < sizeof(posdata); hard++) 1929 printf("%02x ", posdata[hard] & 0xff); 1930 printf("\n"); 1931 #endif 1932 if (posdata[0] & 0x4) /* Block Position Unknown */ 1933 error = EINVAL; 1934 else 1935 *blkptr = _4btol(&posdata[4]); 1936 } 1937 return error; 1938 } 1939 1940 static int 1941 st_setpos(struct st_softc *st, int hard, uint32_t *blkptr) 1942 { 1943 int error; 1944 struct scsi_tape_locate cmd; 1945 1946 /* 1947 * We used to try and flush any buffered writes here. 1948 * Now we push this onto user applications to either 1949 * flush the pending writes themselves (via a zero count 1950 * WRITE FILEMARKS command) or they can trust their tape 1951 * drive to do this correctly for them. 1952 * 1953 * There are very ugly performance limitations otherwise. 1954 */ 1955 1956 memset(&cmd, 0, sizeof(cmd)); 1957 cmd.opcode = LOCATE; 1958 if (hard) 1959 cmd.byte2 = 1 << 2; 1960 _lto4b(*blkptr, cmd.blkaddr); 1961 error = scsipi_command(st->sc_periph, (void *)&cmd, sizeof(cmd), 0, 0, 1962 ST_RETRIES, ST_SPC_TIME, NULL, 0); 1963 /* 1964 * Note file && block number position now unknown (if 1965 * these things ever start being maintained in this driver) 1966 */ 1967 st->fileno = st->blkno = -1; 1968 return error; 1969 } 1970 1971 1972 /* 1973 * Look at the returned sense and act on the error and determine 1974 * the unix error number to pass back..., 0 (== report no error), 1975 * -1 = retry the operation, -2 continue error processing. 1976 */ 1977 static int 1978 st_interpret_sense(struct scsipi_xfer *xs) 1979 { 1980 struct scsipi_periph *periph = xs->xs_periph; 1981 struct scsi_sense_data *sense = &xs->sense.scsi_sense; 1982 struct buf *bp = xs->bp; 1983 struct st_softc *st = device_private(periph->periph_dev); 1984 int retval = EJUSTRETURN; 1985 int doprint = ((xs->xs_control & XS_CTL_SILENT) == 0); 1986 uint8_t key; 1987 int32_t info; 1988 1989 /* 1990 * If it isn't a extended or extended/deferred error, let 1991 * the generic code handle it. 1992 */ 1993 if (SSD_RCODE(sense->response_code) != SSD_RCODE_CURRENT && 1994 SSD_RCODE(sense->response_code) != SSD_RCODE_DEFERRED) 1995 return retval; 1996 1997 if (sense->response_code & SSD_RCODE_VALID) 1998 info = _4btol(sense->info); 1999 else 2000 info = (st->flags & ST_FIXEDBLOCKS) ? 2001 xs->datalen / st->blksize : xs->datalen; 2002 key = SSD_SENSE_KEY(sense->flags); 2003 st->mt_erreg = key; 2004 st->asc = sense->asc; 2005 st->ascq = sense->ascq; 2006 st->mt_resid = (short) info; 2007 2008 if (key == SKEY_NOT_READY && st->asc == 0x4 && st->ascq == 0x1) { 2009 /* Not Ready, Logical Unit Is in Process Of Becoming Ready */ 2010 if (!callout_pending(&periph->periph_callout)) 2011 scsipi_periph_freeze(periph, 1); 2012 callout_reset(&periph->periph_callout, 2013 hz, scsipi_periph_timed_thaw, periph); 2014 return ERESTART; 2015 } 2016 2017 /* If the device is not open yet, let generic handle */ 2018 if ((periph->periph_flags & PERIPH_OPEN) == 0) 2019 return retval; 2020 2021 xs->resid = info; 2022 if (st->flags & ST_FIXEDBLOCKS) { 2023 if (bp) { 2024 xs->resid *= st->blksize; 2025 st->last_io_resid = xs->resid; 2026 } else 2027 st->last_ctl_resid = xs->resid; 2028 if (key == SKEY_VOLUME_OVERFLOW) { 2029 st->flags |= ST_EIO_PENDING; 2030 if (bp) 2031 bp->b_resid = xs->resid; 2032 } else if (sense->flags & SSD_EOM) { 2033 if ((st->flags & ST_EARLYWARN) == 0) 2034 st->flags |= ST_EIO_PENDING; 2035 st->flags |= ST_EOM_PENDING; 2036 if (bp) { 2037 #if 0 2038 bp->b_resid = xs->resid; 2039 #else 2040 /* 2041 * Grotesque as it seems, the few times 2042 * I've actually seen a non-zero resid, 2043 * the tape drive actually lied and had 2044 * written all the data! 2045 */ 2046 bp->b_resid = 0; 2047 #endif 2048 } 2049 } 2050 if (sense->flags & SSD_FILEMARK) { 2051 st->flags |= ST_AT_FILEMARK; 2052 if (bp) 2053 bp->b_resid = xs->resid; 2054 if (st->fileno != (daddr_t) -1) { 2055 st->fileno++; 2056 st->blkno = 0; 2057 st->flags |= ST_POSUPDATED; 2058 } 2059 } 2060 if (sense->flags & SSD_ILI) { 2061 st->flags |= ST_EIO_PENDING; 2062 if (bp) 2063 bp->b_resid = xs->resid; 2064 if (sense->response_code & SSD_RCODE_VALID && 2065 (xs->xs_control & XS_CTL_SILENT) == 0) 2066 aprint_error_dev(st->sc_dev, 2067 "block wrong size, %d blocks residual\n", 2068 info); 2069 2070 /* 2071 * This quirk code helps the drive read 2072 * the first tape block, regardless of 2073 * format. That is required for these 2074 * drives to return proper MODE SENSE 2075 * information. 2076 */ 2077 if ((st->quirks & ST_Q_SENSE_HELP) && 2078 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 2079 st->blksize -= 512; 2080 else if ((st->flags & ST_POSUPDATED) == 0) { 2081 if (st->blkno != (daddr_t) -1) { 2082 st->blkno += 2083 (xs->datalen / st->blksize); 2084 st->flags |= ST_POSUPDATED; 2085 } 2086 } 2087 } 2088 /* 2089 * If data wanted and no data was transferred, do it immediately 2090 */ 2091 if (xs->datalen && xs->resid >= xs->datalen) { 2092 if (st->flags & ST_EIO_PENDING) 2093 return EIO; 2094 if (st->flags & ST_AT_FILEMARK) { 2095 if (bp) 2096 bp->b_resid = xs->resid; 2097 return 0; 2098 } 2099 } 2100 } else { /* must be variable mode */ 2101 if (bp) 2102 st->last_io_resid = xs->resid; 2103 else 2104 st->last_ctl_resid = xs->resid; 2105 if (sense->flags & SSD_EOM) { 2106 /* 2107 * The current semantics of this 2108 * driver requires EOM detection 2109 * to return EIO unless early 2110 * warning detection is enabled 2111 * for variable mode (this is always 2112 * on for fixed block mode). 2113 */ 2114 if (st->flags & ST_EARLYWARN) { 2115 st->flags |= ST_EOM_PENDING; 2116 retval = 0; 2117 } else { 2118 retval = EIO; 2119 /* 2120 * If we return an error we can't claim to 2121 * have transfered all data. 2122 */ 2123 if (xs->resid == 0) 2124 xs->resid = xs->datalen; 2125 } 2126 2127 /* 2128 * If it's an unadorned EOM detection, 2129 * suppress printing an error. 2130 */ 2131 if (key == SKEY_NO_SENSE) { 2132 doprint = 0; 2133 } 2134 } else if (sense->flags & SSD_FILEMARK) { 2135 retval = 0; 2136 if (st->fileno != (daddr_t) -1) { 2137 st->fileno++; 2138 st->blkno = 0; 2139 st->flags |= ST_POSUPDATED; 2140 } 2141 } else if (sense->flags & SSD_ILI) { 2142 if (info < 0) { 2143 /* 2144 * The tape record was bigger than the read 2145 * we issued. 2146 */ 2147 if ((xs->xs_control & XS_CTL_SILENT) == 0) { 2148 aprint_error_dev(st->sc_dev, 2149 "%d-byte tape record too big" 2150 " for %d-byte user buffer\n", 2151 xs->datalen - info, xs->datalen); 2152 } 2153 retval = EIO; 2154 } else { 2155 retval = 0; 2156 if (st->blkno != (daddr_t) -1) { 2157 st->blkno++; 2158 st->flags |= ST_POSUPDATED; 2159 } 2160 } 2161 } 2162 if (bp) 2163 bp->b_resid = xs->resid; 2164 } 2165 2166 #ifndef SCSIPI_DEBUG 2167 if (retval == 0 && key == SKEY_NO_SENSE) 2168 doprint = 0; 2169 #endif 2170 if (key == SKEY_BLANK_CHECK) { 2171 /* 2172 * This quirk code helps the drive read the 2173 * first tape block, regardless of format. That 2174 * is required for these drives to return proper 2175 * MODE SENSE information. 2176 */ 2177 if ((st->quirks & ST_Q_SENSE_HELP) && 2178 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 2179 /* still starting */ 2180 st->blksize -= 512; 2181 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 2182 st->flags |= ST_BLANK_READ; 2183 xs->resid = xs->datalen; 2184 if (bp) { 2185 bp->b_resid = xs->resid; 2186 /* return an EOF */ 2187 } 2188 retval = 0; 2189 /* lost position */ 2190 st->fileno = st->blkno = -1; 2191 } 2192 } 2193 2194 /* 2195 * If generic sense processing will continue, we should not 2196 * print sense info here. 2197 */ 2198 if (retval == EJUSTRETURN) 2199 doprint = 0; 2200 2201 if (doprint) { 2202 /* Print verbose sense info if possible */ 2203 if (scsipi_print_sense(xs, 0) != 0) 2204 return retval; 2205 2206 /* Print less-verbose sense info */ 2207 scsipi_printaddr(periph); 2208 printf("Sense Key 0x%02x", key); 2209 if ((sense->response_code & SSD_RCODE_VALID) != 0) { 2210 switch (key) { 2211 case SKEY_NOT_READY: 2212 case SKEY_ILLEGAL_REQUEST: 2213 case SKEY_UNIT_ATTENTION: 2214 case SKEY_DATA_PROTECT: 2215 break; 2216 case SKEY_VOLUME_OVERFLOW: 2217 case SKEY_BLANK_CHECK: 2218 printf(", requested size: %d (decimal)", info); 2219 break; 2220 case SKEY_ABORTED_COMMAND: 2221 if (xs->xs_retries) 2222 printf(", retrying"); 2223 printf(", cmd 0x%x, info 0x%x", 2224 xs->cmd->opcode, info); 2225 break; 2226 default: 2227 printf(", info = %d (decimal)", info); 2228 } 2229 } 2230 if (sense->extra_len != 0) { 2231 int n; 2232 printf(", data ="); 2233 for (n = 0; n < sense->extra_len; n++) 2234 printf(" %02x", sense->csi[n]); 2235 } 2236 printf("\n"); 2237 } 2238 return retval; 2239 } 2240 2241 /* 2242 * The quirk here is that the drive returns some value to st_mode_sense 2243 * incorrectly until the tape has actually passed by the head. 2244 * 2245 * The method is to set the drive to large fixed-block state (user-specified 2246 * density and 1024-byte blocks), then read and rewind to get it to sense the 2247 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 2248 * work, as a last resort, try variable- length blocks. The result will be 2249 * the ability to do an accurate st_mode_sense. 2250 * 2251 * We know we can do a rewind because we just did a load, which implies rewind. 2252 * Rewind seems preferable to space backward if we have a virgin tape. 2253 * 2254 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 2255 * error processing, both part of st_interpret_sense. 2256 */ 2257 static int 2258 st_touch_tape(struct st_softc *st) 2259 { 2260 char *bf; 2261 int readsize; 2262 int error; 2263 2264 bf = malloc(1024, M_TEMP, M_NOWAIT); 2265 if (bf == NULL) 2266 return ENOMEM; 2267 2268 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 2269 goto bad; 2270 2271 /* 2272 * If the block size is already known from the 2273 * sense data, use it. Else start probing at 1024. 2274 */ 2275 if (st->media_blksize > 0) 2276 st->blksize = st->media_blksize; 2277 else 2278 st->blksize = 1024; 2279 2280 do { 2281 switch (st->blksize) { 2282 case 512: 2283 case 1024: 2284 readsize = st->blksize; 2285 st->flags |= ST_FIXEDBLOCKS; 2286 break; 2287 default: 2288 readsize = 1; 2289 st->flags &= ~ST_FIXEDBLOCKS; 2290 } 2291 if ((error = st->ops(st, ST_OPS_MODESELECT, XS_CTL_SILENT)) 2292 != 0) { 2293 /* 2294 * The device did not agree with the proposed 2295 * block size. If we exhausted our options, 2296 * return failure, else try another. 2297 */ 2298 if (readsize == 1) 2299 goto bad; 2300 st->blksize -= 512; 2301 continue; 2302 } 2303 st_read(st, bf, readsize, XS_CTL_SILENT); /* XXX */ 2304 if ((error = st_rewind(st, 0, 0)) != 0) { 2305 bad: free(bf, M_TEMP); 2306 return error; 2307 } 2308 } while (readsize != 1 && readsize > st->blksize); 2309 2310 free(bf, M_TEMP); 2311 return 0; 2312 } 2313 2314 static int 2315 stdump(dev_t dev, daddr_t blkno, void *va, size_t size) 2316 { 2317 /* Not implemented. */ 2318 return ENXIO; 2319 } 2320 2321 /* 2322 * Send a filled out parameter structure to the drive to 2323 * set it into the desire modes etc. 2324 */ 2325 int 2326 st_mode_select(struct st_softc *st, int flags) 2327 { 2328 u_int select_len; 2329 struct select { 2330 struct scsi_mode_parameter_header_6 header; 2331 struct scsi_general_block_descriptor blk_desc; 2332 u_char sense_data[MAX_PAGE_0_SIZE]; 2333 } select; 2334 struct scsipi_periph *periph = st->sc_periph; 2335 2336 select_len = sizeof(select.header) + sizeof(select.blk_desc) + 2337 st->page_0_size; 2338 2339 /* 2340 * This quirk deals with drives that have only one valid mode 2341 * and think this gives them license to reject all mode selects, 2342 * even if the selected mode is the one that is supported. 2343 */ 2344 if (st->quirks & ST_Q_UNIMODAL) { 2345 SC_DEBUG(periph, SCSIPI_DB3, 2346 ("not setting density 0x%x blksize 0x%x\n", 2347 st->density, st->blksize)); 2348 return 0; 2349 } 2350 2351 /* Set up for a mode select */ 2352 memset(&select, 0, sizeof(select)); 2353 select.header.blk_desc_len = sizeof(struct 2354 scsi_general_block_descriptor); 2355 select.header.dev_spec &= ~SMH_DSP_BUFF_MODE; 2356 select.blk_desc.density = st->density; 2357 if (st->flags & ST_DONTBUFFER) 2358 select.header.dev_spec |= SMH_DSP_BUFF_MODE_OFF; 2359 else 2360 select.header.dev_spec |= SMH_DSP_BUFF_MODE_ON; 2361 if (st->flags & ST_FIXEDBLOCKS) 2362 _lto3b(st->blksize, select.blk_desc.blklen); 2363 if (st->page_0_size) 2364 memcpy(select.sense_data, st->sense_data, st->page_0_size); 2365 2366 /* do the command */ 2367 return scsipi_mode_select(periph, 0, &select.header, select_len, 2368 flags, ST_RETRIES, ST_CTL_TIME); 2369 } 2370
Indexes created Tue Sep 23 13:09:54 GMT 2025