1 /* $NetBSD: st.c,v 1.143 2001/07/18 18:21:06 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Charles M. Hannum. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Originally written by Julian Elischer (julian@tfs.com) 41 * for TRW Financial Systems for use under the MACH(2.5) operating system. 42 * 43 * TRW Financial Systems, in accordance with their agreement with Carnegie 44 * Mellon University, makes this software available to CMU to distribute 45 * or use in any manner that they see fit as long as this message is kept with 46 * the software. For this reason TFS also grants any other persons or 47 * organisations permission to use or modify this software. 48 * 49 * TFS supplies this software to be publicly redistributed 50 * on the understanding that TFS is not responsible for the correct 51 * functioning of this software in any circumstances. 52 * 53 * Ported to run under 386BSD by Julian Elischer (julian@tfs.com) Sept 1992 54 * major changes by Julian Elischer (julian@jules.dialix.oz.au) May 1993 55 * 56 * A lot of rewhacking done by mjacob (mjacob@nas.nasa.gov). 57 */ 58 59 #include "opt_scsi.h" 60 61 #include <sys/types.h> 62 #include <sys/param.h> 63 #include <sys/systm.h> 64 #include <sys/fcntl.h> 65 #include <sys/errno.h> 66 #include <sys/ioctl.h> 67 #include <sys/malloc.h> 68 #include <sys/buf.h> 69 #include <sys/proc.h> 70 #include <sys/user.h> 71 #include <sys/mtio.h> 72 #include <sys/device.h> 73 #include <sys/conf.h> 74 #include <sys/kernel.h> 75 76 #include <dev/scsipi/scsi_all.h> 77 #include <dev/scsipi/scsi_tape.h> 78 #include <dev/scsipi/stvar.h> 79 80 /* Defines for device specific stuff */ 81 #define DEF_FIXED_BSIZE 512 82 83 #define STMODE(z) ( minor(z) & 0x03) 84 #define STDSTY(z) ((minor(z) >> 2) & 0x03) 85 #define STUNIT(z) ((minor(z) >> 4) ) 86 87 #define NORMAL_MODE 0 88 #define NOREW_MODE 1 89 #define EJECT_MODE 2 90 #define CTRL_MODE 3 91 92 #define FALSE 0 93 #define TRUE 1 94 95 #ifndef ST_MOUNT_DELAY 96 #define ST_MOUNT_DELAY 0 97 #endif 98 99 /* 100 * Define various devices that we know mis-behave in some way, 101 * and note how they are bad, so we can correct for them 102 */ 103 104 const struct st_quirk_inquiry_pattern st_quirk_patterns[] = { 105 {{T_SEQUENTIAL, T_REMOV, 106 " ", " ", " "}, {0, 0, { 107 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 108 {ST_Q_FORCE_BLKSIZE, 512, QIC_24}, /* minor 4-7 */ 109 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_1600}, /* minor 8-11 */ 110 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_6250} /* minor 12-15 */ 111 }}}, 112 {{T_SEQUENTIAL, T_REMOV, 113 "TANDBERG", " TDC 3600 ", ""}, {0, 12, { 114 {0, 0, 0}, /* minor 0-3 */ 115 {ST_Q_FORCE_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 116 {0, 0, QIC_150}, /* minor 8-11 */ 117 {0, 0, QIC_120} /* minor 12-15 */ 118 }}}, 119 {{T_SEQUENTIAL, T_REMOV, 120 "TANDBERG", " TDC 3800 ", ""}, {0, 0, { 121 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 122 {0, 0, QIC_525}, /* minor 4-7 */ 123 {0, 0, QIC_150}, /* minor 8-11 */ 124 {0, 0, QIC_120} /* minor 12-15 */ 125 }}}, 126 /* 127 * lacking a manual for the 4200, it's not clear what the 128 * specific density codes should be- the device is a 2.5GB 129 * capable QIC drive, those density codes aren't readily 130 * availabel. The 'default' will just have to do. 131 */ 132 {{T_SEQUENTIAL, T_REMOV, 133 "TANDBERG", " TDC 4200 ", ""}, {0, 0, { 134 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 135 {0, 0, QIC_525}, /* minor 4-7 */ 136 {0, 0, QIC_150}, /* minor 8-11 */ 137 {0, 0, QIC_120} /* minor 12-15 */ 138 }}}, 139 /* 140 * At least -005 and -007 need this. I'll assume they all do unless I 141 * hear otherwise. - mycroft, 31MAR1994 142 */ 143 {{T_SEQUENTIAL, T_REMOV, 144 "ARCHIVE ", "VIPER 2525 25462", ""}, {0, 0, { 145 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 146 {ST_Q_SENSE_HELP, 0, QIC_525}, /* minor 4-7 */ 147 {0, 0, QIC_150}, /* minor 8-11 */ 148 {0, 0, QIC_120} /* minor 12-15 */ 149 }}}, 150 /* 151 * One user reports that this works for his tape drive. It probably 152 * needs more work. - mycroft, 09APR1994 153 */ 154 {{T_SEQUENTIAL, T_REMOV, 155 "SANKYO ", "CP525 ", ""}, {0, 0, { 156 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 157 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 158 {0, 0, QIC_150}, /* minor 8-11 */ 159 {0, 0, QIC_120} /* minor 12-15 */ 160 }}}, 161 {{T_SEQUENTIAL, T_REMOV, 162 "ANRITSU ", "DMT780 ", ""}, {0, 0, { 163 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 164 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 165 {0, 0, QIC_150}, /* minor 8-11 */ 166 {0, 0, QIC_120} /* minor 12-15 */ 167 }}}, 168 {{T_SEQUENTIAL, T_REMOV, 169 "ARCHIVE ", "VIPER 150 21247", ""}, {ST_Q_ERASE_NOIMM, 12, { 170 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 171 {0, 0, QIC_150}, /* minor 4-7 */ 172 {0, 0, QIC_120}, /* minor 8-11 */ 173 {0, 0, QIC_24} /* minor 12-15 */ 174 }}}, 175 {{T_SEQUENTIAL, T_REMOV, 176 "ARCHIVE ", "VIPER 150 21531", ""}, {ST_Q_ERASE_NOIMM, 12, { 177 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 178 {0, 0, QIC_150}, /* minor 4-7 */ 179 {0, 0, QIC_120}, /* minor 8-11 */ 180 {0, 0, QIC_24} /* minor 12-15 */ 181 }}}, 182 {{T_SEQUENTIAL, T_REMOV, 183 "WANGTEK ", "5099ES SCSI", ""}, {0, 0, { 184 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 185 {0, 0, QIC_11}, /* minor 4-7 */ 186 {0, 0, QIC_24}, /* minor 8-11 */ 187 {0, 0, QIC_24} /* minor 12-15 */ 188 }}}, 189 {{T_SEQUENTIAL, T_REMOV, 190 "WANGTEK ", "5150ES SCSI", ""}, {0, 0, { 191 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 192 {0, 0, QIC_24}, /* minor 4-7 */ 193 {0, 0, QIC_120}, /* minor 8-11 */ 194 {0, 0, QIC_150} /* minor 12-15 */ 195 }}}, 196 {{T_SEQUENTIAL, T_REMOV, 197 "WANGTEK ", "5525ES SCSI REV7", ""}, {0, 0, { 198 {0, 0, 0}, /* minor 0-3 */ 199 {ST_Q_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 200 {0, 0, QIC_150}, /* minor 8-11 */ 201 {0, 0, QIC_120} /* minor 12-15 */ 202 }}}, 203 {{T_SEQUENTIAL, T_REMOV, 204 "WangDAT ", "Model 1300 ", ""}, {0, 0, { 205 {0, 0, 0}, /* minor 0-3 */ 206 {ST_Q_FORCE_BLKSIZE, 512, DDS}, /* minor 4-7 */ 207 {ST_Q_FORCE_BLKSIZE, 1024, DDS}, /* minor 8-11 */ 208 {ST_Q_FORCE_BLKSIZE, 0, DDS} /* minor 12-15 */ 209 }}}, 210 {{T_SEQUENTIAL, T_REMOV, 211 "EXABYTE ", "EXB-8200 ", "263H"}, {0, 5, { 212 {0, 0, 0}, /* minor 0-3 */ 213 {0, 0, 0}, /* minor 4-7 */ 214 {0, 0, 0}, /* minor 8-11 */ 215 {0, 0, 0} /* minor 12-15 */ 216 }}}, 217 {{T_SEQUENTIAL, T_REMOV, 218 "STK", "9490", ""}, 219 {ST_Q_FORCE_BLKSIZE, 0, { 220 {0, 0, 0}, /* minor 0-3 */ 221 {0, 0, 0}, /* minor 4-7 */ 222 {0, 0, 0}, /* minor 8-11 */ 223 {0, 0, 0} /* minor 12-15 */ 224 }}}, 225 {{T_SEQUENTIAL, T_REMOV, 226 "STK", "SD-3", ""}, 227 {ST_Q_FORCE_BLKSIZE, 0, { 228 {0, 0, 0}, /* minor 0-3 */ 229 {0, 0, 0}, /* minor 4-7 */ 230 {0, 0, 0}, /* minor 8-11 */ 231 {0, 0, 0} /* minor 12-15 */ 232 }}}, 233 {{T_SEQUENTIAL, T_REMOV, 234 "IBM", "03590", ""}, {ST_Q_IGNORE_LOADS, 0, { 235 {0, 0, 0}, /* minor 0-3 */ 236 {0, 0, 0}, /* minor 4-7 */ 237 {0, 0, 0}, /* minor 8-11 */ 238 {0, 0, 0} /* minor 12-15 */ 239 }}}, 240 {{T_SEQUENTIAL, T_REMOV, 241 "HP ", "T4000s ", ""}, {ST_Q_UNIMODAL, 0, { 242 {0, 0, QIC_3095}, /* minor 0-3 */ 243 {0, 0, QIC_3095}, /* minor 4-7 */ 244 {0, 0, QIC_3095}, /* minor 8-11 */ 245 {0, 0, QIC_3095}, /* minor 12-15 */ 246 }}}, 247 #if 0 248 {{T_SEQUENTIAL, T_REMOV, 249 "EXABYTE ", "EXB-8200 ", ""}, {0, 12, { 250 {0, 0, 0}, /* minor 0-3 */ 251 {0, 0, 0}, /* minor 4-7 */ 252 {0, 0, 0}, /* minor 8-11 */ 253 {0, 0, 0} /* minor 12-15 */ 254 }}}, 255 #endif 256 {{T_SEQUENTIAL, T_REMOV, 257 "TEAC ", "MT-2ST/N50 ", ""}, {ST_Q_IGNORE_LOADS, 0, { 258 {0, 0, 0}, /* minor 0-3 */ 259 {0, 0, 0}, /* minor 4-7 */ 260 {0, 0, 0}, /* minor 8-11 */ 261 {0, 0, 0} /* minor 12-15 */ 262 }}}, 263 {{T_SEQUENTIAL, T_REMOV, 264 "OnStream", "ADR50 Drive", ""}, {ST_Q_UNIMODAL, 0, { 265 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 266 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 4-7 */ 267 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 8-11 */ 268 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 12-15 */ 269 }}}, 270 {{T_SEQUENTIAL, T_REMOV, 271 "NCR H621", "0-STD-03-46F880 ", ""}, {ST_Q_NOPREVENT, 0, { 272 {0, 0, 0}, /* minor 0-3 */ 273 {0, 0, 0}, /* minor 4-7 */ 274 {0, 0, 0}, /* minor 8-11 */ 275 {0, 0, 0} /* minor 12-15 */ 276 }}}, 277 {{T_SEQUENTIAL, T_REMOV, 278 "OnStream DI-30", "", "1.0"}, {ST_Q_IGNORE_LOADS, 0, { 279 {0, 0, 0}, /* minor 0-3 */ 280 {0, 0, 0}, /* minor 4-7 */ 281 {0, 0, 0}, /* minor 8-11 */ 282 {0, 0, 0} /* minor 12-15 */ 283 }}}, 284 }; 285 286 #define NOEJECT 0 287 #define EJECT 1 288 289 void st_identify_drive __P((struct st_softc *, 290 struct scsipi_inquiry_pattern *)); 291 void st_loadquirks __P((struct st_softc *)); 292 int st_mount_tape __P((dev_t, int)); 293 void st_unmount __P((struct st_softc *, boolean)); 294 int st_decide_mode __P((struct st_softc *, boolean)); 295 void ststart __P((struct scsipi_periph *)); 296 void stdone __P((struct scsipi_xfer *)); 297 int st_read __P((struct st_softc *, char *, int, int)); 298 int st_space __P((struct st_softc *, int, u_int, int)); 299 int st_write_filemarks __P((struct st_softc *, int, int)); 300 int st_check_eod __P((struct st_softc *, boolean, int *, int)); 301 int st_load __P((struct st_softc *, u_int, int)); 302 int st_rewind __P((struct st_softc *, u_int, int)); 303 int st_interpret_sense __P((struct scsipi_xfer *)); 304 int st_touch_tape __P((struct st_softc *)); 305 int st_erase __P((struct st_softc *, int full, int flags)); 306 int st_rdpos __P((struct st_softc *, int, u_int32_t *)); 307 int st_setpos __P((struct st_softc *, int, u_int32_t *)); 308 309 const struct scsipi_periphsw st_switch = { 310 st_interpret_sense, 311 ststart, 312 NULL, 313 stdone 314 }; 315 316 #if defined(ST_ENABLE_EARLYWARN) 317 #define ST_INIT_FLAGS ST_EARLYWARN 318 #else 319 #define ST_INIT_FLAGS 0 320 #endif 321 322 /* 323 * The routine called by the low level scsi routine when it discovers 324 * A device suitable for this driver 325 */ 326 void 327 stattach(parent, st, aux) 328 struct device *parent; 329 struct st_softc *st; 330 void *aux; 331 { 332 struct scsipibus_attach_args *sa = aux; 333 struct scsipi_periph *periph = sa->sa_periph; 334 335 SC_DEBUG(periph, SCSIPI_DB2, ("stattach: ")); 336 337 /* 338 * Store information needed to contact our base driver 339 */ 340 st->sc_periph = periph; 341 periph->periph_dev = &st->sc_dev; 342 periph->periph_switch = &st_switch; 343 344 /* 345 * Set initial flags 346 */ 347 348 st->flags = ST_INIT_FLAGS; 349 350 /* 351 * Check if the drive is a known criminal and take 352 * Any steps needed to bring it into line 353 */ 354 st_identify_drive(st, &sa->sa_inqbuf); 355 /* 356 * Use the subdriver to request information regarding the drive. 357 */ 358 printf("\n"); 359 printf("%s: %s", st->sc_dev.dv_xname, st->quirkdata ? "rogue, " : ""); 360 if (scsipi_test_unit_ready(periph, 361 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE) || 362 st->ops(st, ST_OPS_MODESENSE, 363 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE)) 364 printf("drive empty\n"); 365 else { 366 printf("density code %d, ", st->media_density); 367 if (st->media_blksize > 0) 368 printf("%d-byte", st->media_blksize); 369 else 370 printf("variable"); 371 printf(" blocks, write-%s\n", 372 (st->flags & ST_READONLY) ? "protected" : "enabled"); 373 } 374 375 /* 376 * Set up the buf queue for this device 377 */ 378 BUFQ_INIT(&st->buf_queue); 379 380 #if NRND > 0 381 rnd_attach_source(&st->rnd_source, st->sc_dev.dv_xname, 382 RND_TYPE_TAPE, 0); 383 #endif 384 } 385 386 /* 387 * Use the inquiry routine in 'scsi_base' to get drive info so we can 388 * Further tailor our behaviour. 389 */ 390 void 391 st_identify_drive(st, inqbuf) 392 struct st_softc *st; 393 struct scsipi_inquiry_pattern *inqbuf; 394 { 395 struct st_quirk_inquiry_pattern *finger; 396 int priority; 397 398 finger = (struct st_quirk_inquiry_pattern *)scsipi_inqmatch(inqbuf, 399 (caddr_t)st_quirk_patterns, 400 sizeof(st_quirk_patterns) / sizeof(st_quirk_patterns[0]), 401 sizeof(st_quirk_patterns[0]), &priority); 402 if (priority != 0) { 403 st->quirkdata = &finger->quirkdata; 404 st->drive_quirks = finger->quirkdata.quirks; 405 st->quirks = finger->quirkdata.quirks; /* start value */ 406 st->page_0_size = finger->quirkdata.page_0_size; 407 st_loadquirks(st); 408 } 409 } 410 411 /* 412 * initialise the subdevices to the default (QUIRK) state. 413 * this will remove any setting made by the system operator or previous 414 * operations. 415 */ 416 void 417 st_loadquirks(st) 418 struct st_softc *st; 419 { 420 int i; 421 struct modes *mode; 422 struct modes *mode2; 423 424 mode = st->quirkdata->modes; 425 mode2 = st->modes; 426 for (i = 0; i < 4; i++) { 427 memset(mode2, 0, sizeof(struct modes)); 428 st->modeflags[i] &= ~(BLKSIZE_SET_BY_QUIRK | 429 DENSITY_SET_BY_QUIRK | BLKSIZE_SET_BY_USER | 430 DENSITY_SET_BY_USER); 431 if ((mode->quirks | st->drive_quirks) & ST_Q_FORCE_BLKSIZE) { 432 mode2->blksize = mode->blksize; 433 st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; 434 } 435 if (mode->density) { 436 mode2->density = mode->density; 437 st->modeflags[i] |= DENSITY_SET_BY_QUIRK; 438 } 439 mode2->quirks |= mode->quirks; 440 mode++; 441 mode2++; 442 } 443 } 444 445 /* 446 * open the device. 447 */ 448 int 449 stopen(dev, flags, mode, p) 450 dev_t dev; 451 int flags; 452 int mode; 453 struct proc *p; 454 { 455 u_int stmode, dsty; 456 int error, sflags, unit, tries, ntries; 457 struct st_softc *st; 458 struct scsipi_periph *periph; 459 struct scsipi_adapter *adapt; 460 461 unit = STUNIT(dev); 462 if (unit >= st_cd.cd_ndevs) 463 return (ENXIO); 464 st = st_cd.cd_devs[unit]; 465 if (st == NULL) 466 return (ENXIO); 467 468 stmode = STMODE(dev); 469 dsty = STDSTY(dev); 470 471 periph = st->sc_periph; 472 adapt = periph->periph_channel->chan_adapter; 473 474 SC_DEBUG(periph, SCSIPI_DB1, ("open: dev=0x%x (unit %d (of %d))\n", dev, 475 unit, st_cd.cd_ndevs)); 476 477 478 /* 479 * Only allow one at a time 480 */ 481 if (periph->periph_flags & PERIPH_OPEN) { 482 printf("%s: already open\n", st->sc_dev.dv_xname); 483 return (EBUSY); 484 } 485 486 if ((error = scsipi_adapter_addref(adapt)) != 0) 487 return (error); 488 489 /* 490 * clear any latched errors. 491 */ 492 st->mt_resid = 0; 493 st->mt_erreg = 0; 494 st->asc = 0; 495 st->ascq = 0; 496 497 /* 498 * Catch any unit attention errors. Be silent about this 499 * unless we're already mounted. We ignore media change 500 * if we're in control mode or not mounted yet. 501 */ 502 if ((st->flags & ST_MOUNTED) == 0 || stmode == CTRL_MODE) { 503 #ifdef SCSIDEBUG 504 sflags = XS_CTL_IGNORE_MEDIA_CHANGE; 505 #else 506 sflags = XS_CTL_SILENT|XS_CTL_IGNORE_MEDIA_CHANGE; 507 #endif 508 } else 509 sflags = 0; 510 511 /* 512 * If we're already mounted or we aren't configured for 513 * a mount delay, only try a test unit ready once. Otherwise, 514 * try up to ST_MOUNT_DELAY times with a rest interval of 515 * one second between each try. 516 */ 517 518 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0) { 519 ntries = 1; 520 } else { 521 ntries = ST_MOUNT_DELAY; 522 } 523 524 for (error = tries = 0; tries < ntries; tries++) { 525 int slpintr, oflags; 526 527 /* 528 * If we had no error, or we're opening the control mode 529 * device, we jump out right away. 530 */ 531 532 error = scsipi_test_unit_ready(periph, sflags); 533 if (error == 0 || stmode == CTRL_MODE) { 534 break; 535 } 536 537 /* 538 * We had an error. 539 * 540 * If we're already mounted or we aren't configured for 541 * a mount delay, or the error isn't a NOT READY error, 542 * skip to the error exit now. 543 */ 544 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0 || 545 (st->mt_key != SKEY_NOT_READY)) { 546 goto bad; 547 } 548 549 /* 550 * clear any latched errors. 551 */ 552 st->mt_resid = 0; 553 st->mt_erreg = 0; 554 st->asc = 0; 555 st->ascq = 0; 556 557 /* 558 * Fake that we have the device open so 559 * we block other apps from getting in. 560 */ 561 562 oflags = periph->periph_flags; 563 periph->periph_flags |= PERIPH_OPEN; 564 565 slpintr = tsleep(&lbolt, PUSER|PCATCH, "stload", 0); 566 567 periph->periph_flags = oflags; /* restore flags */ 568 if (slpintr) { 569 goto bad; 570 } 571 } 572 573 574 /* 575 * If the mode is 3 (e.g. minor = 3,7,11,15) then the device has 576 * been opened to set defaults and perform other, usually non-I/O 577 * related, operations. In this case, do a quick check to see 578 * whether the unit actually had a tape loaded (this will be known 579 * as to whether or not we got a NOT READY for the above 580 * unit attention). If a tape is there, go do a mount sequence. 581 */ 582 if (stmode == CTRL_MODE && st->mt_key == SKEY_NOT_READY) { 583 periph->periph_flags |= PERIPH_OPEN; 584 return (0); 585 } 586 587 /* 588 * If we get this far and had an error set, that means we failed 589 * to pass the 'test unit ready' test for the non-controlmode device, 590 * so we bounce the open. 591 */ 592 593 if (error) 594 return (error); 595 596 /* 597 * Else, we're now committed to saying we're open. 598 */ 599 600 periph->periph_flags |= PERIPH_OPEN; /* unit attn are now errors */ 601 602 /* 603 * If it's a different mode, or if the media has been 604 * invalidated, unmount the tape from the previous 605 * session but continue with open processing 606 */ 607 if (st->last_dsty != dsty || 608 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 609 st_unmount(st, NOEJECT); 610 611 /* 612 * If we are not mounted, then we should start a new 613 * mount session. 614 */ 615 if (!(st->flags & ST_MOUNTED)) { 616 if ((error = st_mount_tape(dev, flags)) != 0) 617 goto bad; 618 st->last_dsty = dsty; 619 } 620 621 SC_DEBUG(periph, SCSIPI_DB2, ("open complete\n")); 622 return (0); 623 624 bad: 625 st_unmount(st, NOEJECT); 626 scsipi_adapter_delref(adapt); 627 periph->periph_flags &= ~PERIPH_OPEN; 628 return (error); 629 } 630 631 /* 632 * close the device.. only called if we are the LAST 633 * occurence of an open device 634 */ 635 int 636 stclose(dev, flags, mode, p) 637 dev_t dev; 638 int flags; 639 int mode; 640 struct proc *p; 641 { 642 int stxx, error = 0; 643 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 644 struct scsipi_periph *periph = st->sc_periph; 645 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 646 647 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("closing\n")); 648 649 /* 650 * Make sure that a tape opened in write-only mode will have 651 * file marks written on it when closed, even if not written to. 652 * 653 * This is for SUN compatibility. Actually, the Sun way of 654 * things is to: 655 * 656 * only write filemarks if there are fmks to be written and 657 * - open for write (possibly read/write) 658 * - the last operation was a write 659 * or: 660 * - opened for wronly 661 * - no data was written (including filemarks) 662 */ 663 664 stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); 665 if (((flags & FWRITE) && stxx == ST_WRITTEN) || 666 ((flags & O_ACCMODE) == FWRITE && stxx == 0)) { 667 int nm; 668 error = st_check_eod(st, FALSE, &nm, 0); 669 } 670 671 switch (STMODE(dev)) { 672 case NORMAL_MODE: 673 st_unmount(st, NOEJECT); 674 break; 675 case NOREW_MODE: 676 case CTRL_MODE: 677 /* 678 * Leave mounted unless media seems to have been removed. 679 * 680 * Otherwise, if we're to terminate a tape with more than one 681 * filemark [ and because we're not rewinding here ], backspace 682 * one filemark so that later appends will see an unbroken 683 * sequence of: 684 * 685 * file - FMK - file - FMK ... file - FMK FMK (EOM) 686 */ 687 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 688 st_unmount(st, NOEJECT); 689 } else if (error == 0) { 690 /* 691 * ST_WRITTEN was preserved from above. 692 * 693 * All we need to know here is: 694 * 695 * Were we writing this tape and was the last 696 * operation a write? 697 * 698 * Are there supposed to be 2FM at EOD? 699 * 700 * If both statements are true, then we backspace 701 * one filemark. 702 */ 703 stxx |= (st->flags & ST_2FM_AT_EOD); 704 if ((flags & FWRITE) != 0 && 705 (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { 706 error = st_space(st, -1, SP_FILEMARKS, 0); 707 } 708 } 709 break; 710 case EJECT_MODE: 711 st_unmount(st, EJECT); 712 break; 713 } 714 715 scsipi_wait_drain(periph); 716 717 scsipi_adapter_delref(adapt); 718 periph->periph_flags &= ~PERIPH_OPEN; 719 720 return (error); 721 } 722 723 /* 724 * Start a new mount session. 725 * Copy in all the default parameters from the selected device mode. 726 * and try guess any that seem to be defaulted. 727 */ 728 int 729 st_mount_tape(dev, flags) 730 dev_t dev; 731 int flags; 732 { 733 int unit; 734 u_int dsty; 735 struct st_softc *st; 736 struct scsipi_periph *periph; 737 int error = 0; 738 739 unit = STUNIT(dev); 740 dsty = STDSTY(dev); 741 st = st_cd.cd_devs[unit]; 742 periph = st->sc_periph; 743 744 if (st->flags & ST_MOUNTED) 745 return (0); 746 747 SC_DEBUG(periph, SCSIPI_DB1, ("mounting\n ")); 748 st->flags |= ST_NEW_MOUNT; 749 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 750 /* 751 * If the media is new, then make sure we give it a chance to 752 * to do a 'load' instruction. (We assume it is new.) 753 */ 754 if ((error = st_load(st, LD_LOAD, XS_CTL_SILENT)) != 0) 755 return (error); 756 /* 757 * Throw another dummy instruction to catch 758 * 'Unit attention' errors. Many drives give 759 * these after doing a Load instruction (with 760 * the MEDIUM MAY HAVE CHANGED asc/ascq). 761 */ 762 scsipi_test_unit_ready(periph, XS_CTL_SILENT); /* XXX */ 763 764 /* 765 * Some devices can't tell you much until they have been 766 * asked to look at the media. This quirk does this. 767 */ 768 if (st->quirks & ST_Q_SENSE_HELP) 769 if ((error = st_touch_tape(st)) != 0) 770 return (error); 771 /* 772 * Load the physical device parameters 773 * loads: blkmin, blkmax 774 */ 775 if ((error = st->ops(st, ST_OPS_RBL, 0)) != 0) 776 return (error); 777 /* 778 * Load the media dependent parameters 779 * includes: media_blksize,media_density,numblks 780 * As we have a tape in, it should be reflected here. 781 * If not you may need the "quirk" above. 782 */ 783 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 784 return (error); 785 /* 786 * If we have gained a permanent density from somewhere, 787 * then use it in preference to the one supplied by 788 * default by the driver. 789 */ 790 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 791 st->density = st->modes[dsty].density; 792 else 793 st->density = st->media_density; 794 /* 795 * If we have gained a permanent blocksize 796 * then use it in preference to the one supplied by 797 * default by the driver. 798 */ 799 st->flags &= ~ST_FIXEDBLOCKS; 800 if (st->modeflags[dsty] & 801 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 802 st->blksize = st->modes[dsty].blksize; 803 if (st->blksize) 804 st->flags |= ST_FIXEDBLOCKS; 805 } else { 806 if ((error = st_decide_mode(st, FALSE)) != 0) 807 return (error); 808 } 809 if ((error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 810 /* ATAPI will return ENODEV for this, and this may be OK */ 811 if (error != ENODEV) { 812 printf("%s: cannot set selected mode\n", 813 st->sc_dev.dv_xname); 814 return (error); 815 } 816 } 817 if (!(st->quirks & ST_Q_NOPREVENT)) { 818 scsipi_prevent(periph, PR_PREVENT, 819 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 820 } 821 st->flags &= ~ST_NEW_MOUNT; 822 st->flags |= ST_MOUNTED; 823 periph->periph_flags |= PERIPH_MEDIA_LOADED; /* move earlier? */ 824 825 return (0); 826 } 827 828 /* 829 * End the present mount session. 830 * Rewind, and optionally eject the tape. 831 * Reset various flags to indicate that all new 832 * operations require another mount operation 833 */ 834 void 835 st_unmount(st, eject) 836 struct st_softc *st; 837 boolean eject; 838 { 839 struct scsipi_periph *periph = st->sc_periph; 840 int nmarks; 841 842 if ((st->flags & ST_MOUNTED) == 0) 843 return; 844 SC_DEBUG(periph, SCSIPI_DB1, ("unmounting\n")); 845 st_check_eod(st, FALSE, &nmarks, XS_CTL_IGNORE_NOT_READY); 846 st_rewind(st, 0, XS_CTL_IGNORE_NOT_READY); 847 848 /* 849 * Section 9.3.3 of the SCSI specs states that a device shall return 850 * the density value specified in the last succesfull MODE SELECT 851 * after an unload operation, in case it is not able to 852 * automatically determine the density of the new medium. 853 * 854 * So we instruct the device to use the default density, which will 855 * prevent the use of stale density values (in particular, 856 * in st_touch_tape(). 857 */ 858 st->density = 0; 859 if (st->ops(st, ST_OPS_MODESELECT, 0) != 0) { 860 printf("%s: WARNING: cannot revert to default density\n", 861 st->sc_dev.dv_xname); 862 } 863 864 scsipi_prevent(periph, PR_ALLOW, 865 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 866 if (eject) 867 st_load(st, LD_UNLOAD, XS_CTL_IGNORE_NOT_READY); 868 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 869 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 870 } 871 872 /* 873 * Given all we know about the device, media, mode, 'quirks' and 874 * initial operation, make a decision as to how we should be set 875 * to run (regarding blocking and EOD marks) 876 */ 877 int 878 st_decide_mode(st, first_read) 879 struct st_softc *st; 880 boolean first_read; 881 { 882 883 SC_DEBUG(st->sc_periph, SCSIPI_DB2, ("starting block mode decision\n")); 884 885 /* 886 * If the drive can only handle fixed-length blocks and only at 887 * one size, perhaps we should just do that. 888 */ 889 if (st->blkmin && (st->blkmin == st->blkmax)) { 890 st->flags |= ST_FIXEDBLOCKS; 891 st->blksize = st->blkmin; 892 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 893 ("blkmin == blkmax of %d\n", st->blkmin)); 894 goto done; 895 } 896 /* 897 * If the tape density mandates (or even suggests) use of fixed 898 * or variable-length blocks, comply. 899 */ 900 switch (st->density) { 901 case HALFINCH_800: 902 case HALFINCH_1600: 903 case HALFINCH_6250: 904 case DDS: 905 st->flags &= ~ST_FIXEDBLOCKS; 906 st->blksize = 0; 907 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 908 ("density specified variable\n")); 909 goto done; 910 case QIC_11: 911 case QIC_24: 912 case QIC_120: 913 case QIC_150: 914 case QIC_525: 915 case QIC_1320: 916 case QIC_3095: 917 case QIC_3220: 918 st->flags |= ST_FIXEDBLOCKS; 919 if (st->media_blksize > 0) 920 st->blksize = st->media_blksize; 921 else 922 st->blksize = DEF_FIXED_BSIZE; 923 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 924 ("density specified fixed\n")); 925 goto done; 926 } 927 /* 928 * If we're about to read the tape, perhaps we should choose 929 * fixed or variable-length blocks and block size according to 930 * what the drive found on the tape. 931 */ 932 if (first_read && 933 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 934 (st->media_blksize == DEF_FIXED_BSIZE) || 935 (st->media_blksize == 1024))) { 936 if (st->media_blksize > 0) 937 st->flags |= ST_FIXEDBLOCKS; 938 else 939 st->flags &= ~ST_FIXEDBLOCKS; 940 st->blksize = st->media_blksize; 941 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 942 ("Used media_blksize of %d\n", st->media_blksize)); 943 goto done; 944 } 945 /* 946 * We're getting no hints from any direction. Choose variable- 947 * length blocks arbitrarily. 948 */ 949 st->flags &= ~ST_FIXEDBLOCKS; 950 st->blksize = 0; 951 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 952 ("Give up and default to variable mode\n")); 953 954 done: 955 /* 956 * Decide whether or not to write two file marks to signify end- 957 * of-data. Make the decision as a function of density. If 958 * the decision is not to use a second file mark, the SCSI BLANK 959 * CHECK condition code will be recognized as end-of-data when 960 * first read. 961 * (I think this should be a by-product of fixed/variable..julian) 962 */ 963 switch (st->density) { 964 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 965 case QIC_11: 966 case QIC_24: 967 case QIC_120: 968 case QIC_150: 969 case QIC_525: 970 case QIC_1320: 971 case QIC_3095: 972 case QIC_3220: 973 st->flags &= ~ST_2FM_AT_EOD; 974 break; 975 default: 976 st->flags |= ST_2FM_AT_EOD; 977 } 978 return (0); 979 } 980 981 /* 982 * Actually translate the requested transfer into 983 * one the physical driver can understand 984 * The transfer is described by a buf and will include 985 * only one physical transfer. 986 */ 987 void 988 ststrategy(bp) 989 struct buf *bp; 990 { 991 struct st_softc *st = st_cd.cd_devs[STUNIT(bp->b_dev)]; 992 int s; 993 994 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 995 ("ststrategy %ld bytes @ blk %d\n", bp->b_bcount, bp->b_blkno)); 996 /* 997 * If it's a null transfer, return immediatly 998 */ 999 if (bp->b_bcount == 0) 1000 goto done; 1001 1002 /* If offset is negative, error */ 1003 if (bp->b_blkno < 0) { 1004 bp->b_error = EINVAL; 1005 goto bad; 1006 } 1007 1008 /* 1009 * Odd sized request on fixed drives are verboten 1010 */ 1011 if (st->flags & ST_FIXEDBLOCKS) { 1012 if (bp->b_bcount % st->blksize) { 1013 printf("%s: bad request, must be multiple of %d\n", 1014 st->sc_dev.dv_xname, st->blksize); 1015 bp->b_error = EIO; 1016 goto bad; 1017 } 1018 } 1019 /* 1020 * as are out-of-range requests on variable drives. 1021 */ 1022 else if (bp->b_bcount < st->blkmin || 1023 (st->blkmax && bp->b_bcount > st->blkmax)) { 1024 printf("%s: bad request, must be between %d and %d\n", 1025 st->sc_dev.dv_xname, st->blkmin, st->blkmax); 1026 bp->b_error = EIO; 1027 goto bad; 1028 } 1029 s = splbio(); 1030 1031 /* 1032 * Place it in the queue of activities for this tape 1033 * at the end (a bit silly because we only have on user.. 1034 * (but it could fork())) 1035 */ 1036 BUFQ_INSERT_TAIL(&st->buf_queue, bp); 1037 1038 /* 1039 * Tell the device to get going on the transfer if it's 1040 * not doing anything, otherwise just wait for completion 1041 * (All a bit silly if we're only allowing 1 open but..) 1042 */ 1043 ststart(st->sc_periph); 1044 1045 splx(s); 1046 return; 1047 bad: 1048 bp->b_flags |= B_ERROR; 1049 done: 1050 /* 1051 * Correctly set the buf to indicate a completed xfer 1052 */ 1053 bp->b_resid = bp->b_bcount; 1054 biodone(bp); 1055 return; 1056 } 1057 1058 /* 1059 * ststart looks to see if there is a buf waiting for the device 1060 * and that the device is not already busy. If both are true, 1061 * It dequeues the buf and creates a scsi command to perform the 1062 * transfer required. The transfer request will call scsipi_done 1063 * on completion, which will in turn call this routine again 1064 * so that the next queued transfer is performed. 1065 * The bufs are queued by the strategy routine (ststrategy) 1066 * 1067 * This routine is also called after other non-queued requests 1068 * have been made of the scsi driver, to ensure that the queue 1069 * continues to be drained. 1070 * ststart() is called at splbio 1071 */ 1072 void 1073 ststart(periph) 1074 struct scsipi_periph *periph; 1075 { 1076 struct st_softc *st = (void *)periph->periph_dev; 1077 struct buf *bp; 1078 struct scsi_rw_tape cmd; 1079 int flags, error; 1080 1081 SC_DEBUG(periph, SCSIPI_DB2, ("ststart ")); 1082 /* 1083 * See if there is a buf to do and we are not already 1084 * doing one 1085 */ 1086 while (periph->periph_active < periph->periph_openings) { 1087 /* if a special awaits, let it proceed first */ 1088 if (periph->periph_flags & PERIPH_WAITING) { 1089 periph->periph_flags &= ~PERIPH_WAITING; 1090 wakeup((caddr_t)periph); 1091 return; 1092 } 1093 1094 if ((bp = BUFQ_FIRST(&st->buf_queue)) == NULL) 1095 return; 1096 BUFQ_REMOVE(&st->buf_queue, bp); 1097 1098 /* 1099 * If the device has been unmounted by the user 1100 * then throw away all requests until done. 1101 */ 1102 if ((st->flags & ST_MOUNTED) == 0 || 1103 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 1104 /* make sure that one implies the other.. */ 1105 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 1106 bp->b_flags |= B_ERROR; 1107 bp->b_error = EIO; 1108 bp->b_resid = bp->b_bcount; 1109 biodone(bp); 1110 continue; 1111 } 1112 /* 1113 * only FIXEDBLOCK devices have pending I/O or space operations. 1114 */ 1115 if (st->flags & ST_FIXEDBLOCKS) { 1116 /* 1117 * If we are at a filemark but have not reported it yet 1118 * then we should report it now 1119 */ 1120 if (st->flags & ST_AT_FILEMARK) { 1121 if ((bp->b_flags & B_READ) == B_WRITE) { 1122 /* 1123 * Handling of ST_AT_FILEMARK in 1124 * st_space will fill in the right file 1125 * mark count. 1126 * Back up over filemark 1127 */ 1128 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1129 bp->b_flags |= B_ERROR; 1130 bp->b_error = EIO; 1131 biodone(bp); 1132 continue; 1133 } 1134 } else { 1135 bp->b_resid = bp->b_bcount; 1136 bp->b_error = 0; 1137 bp->b_flags &= ~B_ERROR; 1138 st->flags &= ~ST_AT_FILEMARK; 1139 biodone(bp); 1140 continue; /* seek more work */ 1141 } 1142 } 1143 } 1144 /* 1145 * If we are at EOM but have not reported it 1146 * yet then we should report it now. 1147 */ 1148 if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { 1149 bp->b_resid = bp->b_bcount; 1150 if (st->flags & ST_EIO_PENDING) { 1151 bp->b_error = EIO; 1152 bp->b_flags |= B_ERROR; 1153 } 1154 st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); 1155 biodone(bp); 1156 continue; /* seek more work */ 1157 } 1158 1159 /* 1160 * Fill out the scsi command 1161 */ 1162 memset(&cmd, 0, sizeof(cmd)); 1163 flags = XS_CTL_NOSLEEP | XS_CTL_ASYNC; 1164 if ((bp->b_flags & B_READ) == B_WRITE) { 1165 cmd.opcode = WRITE; 1166 st->flags &= ~ST_FM_WRITTEN; 1167 flags |= XS_CTL_DATA_OUT; 1168 } else { 1169 cmd.opcode = READ; 1170 flags |= XS_CTL_DATA_IN; 1171 } 1172 1173 /* 1174 * Handle "fixed-block-mode" tape drives by using the 1175 * block count instead of the length. 1176 */ 1177 if (st->flags & ST_FIXEDBLOCKS) { 1178 cmd.byte2 |= SRW_FIXED; 1179 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1180 } else 1181 _lto3b(bp->b_bcount, cmd.len); 1182 1183 /* 1184 * go ask the adapter to do all this for us 1185 */ 1186 error = scsipi_command(periph, 1187 (struct scsipi_generic *)&cmd, sizeof(cmd), 1188 (u_char *)bp->b_data, bp->b_bcount, 1189 0, ST_IO_TIME, bp, flags); 1190 if (error) { 1191 printf("%s: not queued, error %d\n", 1192 st->sc_dev.dv_xname, error); 1193 } 1194 } /* go back and see if we can cram more work in.. */ 1195 } 1196 1197 void 1198 stdone(xs) 1199 struct scsipi_xfer *xs; 1200 { 1201 struct st_softc *st = (void *)xs->xs_periph->periph_dev; 1202 1203 if (xs->bp != NULL) { 1204 if ((xs->bp->b_flags & B_READ) == B_WRITE) { 1205 st->flags |= ST_WRITTEN; 1206 } else { 1207 st->flags &= ~ST_WRITTEN; 1208 } 1209 #if NRND > 0 1210 rnd_add_uint32(&st->rnd_source, xs->bp->b_blkno); 1211 #endif 1212 } 1213 } 1214 1215 int 1216 stread(dev, uio, iomode) 1217 dev_t dev; 1218 struct uio *uio; 1219 int iomode; 1220 { 1221 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1222 1223 return (physio(ststrategy, NULL, dev, B_READ, 1224 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1225 } 1226 1227 int 1228 stwrite(dev, uio, iomode) 1229 dev_t dev; 1230 struct uio *uio; 1231 int iomode; 1232 { 1233 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1234 1235 return (physio(ststrategy, NULL, dev, B_WRITE, 1236 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1237 } 1238 1239 /* 1240 * Perform special action on behalf of the user; 1241 * knows about the internals of this device 1242 */ 1243 int 1244 stioctl(dev, cmd, arg, flag, p) 1245 dev_t dev; 1246 u_long cmd; 1247 caddr_t arg; 1248 int flag; 1249 struct proc *p; 1250 { 1251 int error = 0; 1252 int unit; 1253 int number, nmarks, dsty; 1254 int flags; 1255 struct st_softc *st; 1256 int hold_blksize; 1257 u_int8_t hold_density; 1258 struct mtop *mt = (struct mtop *) arg; 1259 1260 /* 1261 * Find the device that the user is talking about 1262 */ 1263 flags = 0; /* give error messages, act on errors etc. */ 1264 unit = STUNIT(dev); 1265 dsty = STDSTY(dev); 1266 st = st_cd.cd_devs[unit]; 1267 hold_blksize = st->blksize; 1268 hold_density = st->density; 1269 1270 switch ((u_int) cmd) { 1271 1272 case MTIOCGET: { 1273 struct mtget *g = (struct mtget *) arg; 1274 /* 1275 * (to get the current state of READONLY) 1276 */ 1277 error = st->ops(st, ST_OPS_MODESENSE, XS_CTL_SILENT); 1278 if (error) { 1279 /* 1280 * Ignore the error if in control mode; 1281 * this is mandated by st(4). 1282 */ 1283 if (STMODE(dev) != CTRL_MODE) 1284 break; 1285 error = 0; 1286 } 1287 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("[ioctl: get status]\n")); 1288 memset(g, 0, sizeof(struct mtget)); 1289 g->mt_type = 0x7; /* Ultrix compat *//*? */ 1290 g->mt_blksiz = st->blksize; 1291 g->mt_density = st->density; 1292 g->mt_mblksiz[0] = st->modes[0].blksize; 1293 g->mt_mblksiz[1] = st->modes[1].blksize; 1294 g->mt_mblksiz[2] = st->modes[2].blksize; 1295 g->mt_mblksiz[3] = st->modes[3].blksize; 1296 g->mt_mdensity[0] = st->modes[0].density; 1297 g->mt_mdensity[1] = st->modes[1].density; 1298 g->mt_mdensity[2] = st->modes[2].density; 1299 g->mt_mdensity[3] = st->modes[3].density; 1300 if (st->flags & ST_READONLY) 1301 g->mt_dsreg |= MT_DS_RDONLY; 1302 if (st->flags & ST_MOUNTED) 1303 g->mt_dsreg |= MT_DS_MOUNTED; 1304 g->mt_resid = st->mt_resid; 1305 g->mt_erreg = st->mt_erreg; 1306 /* 1307 * clear latched errors. 1308 */ 1309 st->mt_resid = 0; 1310 st->mt_erreg = 0; 1311 st->asc = 0; 1312 st->ascq = 0; 1313 break; 1314 } 1315 case MTIOCTOP: { 1316 1317 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1318 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1319 mt->mt_count)); 1320 1321 /* compat: in U*x it is a short */ 1322 number = mt->mt_count; 1323 switch ((short) (mt->mt_op)) { 1324 case MTWEOF: /* write an end-of-file record */ 1325 error = st_write_filemarks(st, number, flags); 1326 break; 1327 case MTBSF: /* backward space file */ 1328 number = -number; 1329 case MTFSF: /* forward space file */ 1330 error = st_check_eod(st, FALSE, &nmarks, flags); 1331 if (!error) 1332 error = st_space(st, number - nmarks, 1333 SP_FILEMARKS, flags); 1334 break; 1335 case MTBSR: /* backward space record */ 1336 number = -number; 1337 case MTFSR: /* forward space record */ 1338 error = st_check_eod(st, TRUE, &nmarks, flags); 1339 if (!error) 1340 error = st_space(st, number, SP_BLKS, flags); 1341 break; 1342 case MTREW: /* rewind */ 1343 error = st_rewind(st, 0, flags); 1344 break; 1345 case MTOFFL: /* rewind and put the drive offline */ 1346 st_unmount(st, EJECT); 1347 break; 1348 case MTNOP: /* no operation, sets status only */ 1349 break; 1350 case MTRETEN: /* retension the tape */ 1351 error = st_load(st, LD_RETENSION, flags); 1352 if (!error) 1353 error = st_load(st, LD_LOAD, flags); 1354 break; 1355 case MTEOM: /* forward space to end of media */ 1356 error = st_check_eod(st, FALSE, &nmarks, flags); 1357 if (!error) 1358 error = st_space(st, 1, SP_EOM, flags); 1359 break; 1360 case MTCACHE: /* enable controller cache */ 1361 st->flags &= ~ST_DONTBUFFER; 1362 goto try_new_value; 1363 case MTNOCACHE: /* disable controller cache */ 1364 st->flags |= ST_DONTBUFFER; 1365 goto try_new_value; 1366 case MTERASE: /* erase volume */ 1367 error = st_erase(st, number, flags); 1368 break; 1369 case MTSETBSIZ: /* Set block size for device */ 1370 #ifdef NOTYET 1371 if (!(st->flags & ST_NEW_MOUNT)) { 1372 uprintf("re-mount tape before changing blocksize"); 1373 error = EINVAL; 1374 break; 1375 } 1376 #endif 1377 if (number == 0) 1378 st->flags &= ~ST_FIXEDBLOCKS; 1379 else { 1380 if ((st->blkmin || st->blkmax) && 1381 (number < st->blkmin || 1382 number > st->blkmax)) { 1383 error = EINVAL; 1384 break; 1385 } 1386 st->flags |= ST_FIXEDBLOCKS; 1387 } 1388 st->blksize = number; 1389 st->flags |= ST_BLOCK_SET; /*XXX */ 1390 goto try_new_value; 1391 1392 case MTSETDNSTY: /* Set density for device and mode */ 1393 /* 1394 * Any number >= 0 and <= 0xff is legal. Numbers 1395 * above 0x80 are 'vendor unique'. 1396 */ 1397 if (number < 0 || number > 255) { 1398 error = EINVAL; 1399 break; 1400 } else 1401 st->density = number; 1402 goto try_new_value; 1403 1404 case MTCMPRESS: 1405 error = st->ops(st, (number == 0) ? 1406 ST_OPS_CMPRSS_OFF : ST_OPS_CMPRSS_ON, 1407 XS_CTL_SILENT); 1408 break; 1409 1410 case MTEWARN: 1411 if (number) 1412 st->flags |= ST_EARLYWARN; 1413 else 1414 st->flags &= ~ST_EARLYWARN; 1415 break; 1416 1417 default: 1418 error = EINVAL; 1419 } 1420 break; 1421 } 1422 case MTIOCIEOT: 1423 case MTIOCEEOT: 1424 break; 1425 1426 case MTIOCRDSPOS: 1427 error = st_rdpos(st, 0, (u_int32_t *) arg); 1428 break; 1429 1430 case MTIOCRDHPOS: 1431 error = st_rdpos(st, 1, (u_int32_t *) arg); 1432 break; 1433 1434 case MTIOCSLOCATE: 1435 error = st_setpos(st, 0, (u_int32_t *) arg); 1436 break; 1437 1438 case MTIOCHLOCATE: 1439 error = st_setpos(st, 1, (u_int32_t *) arg); 1440 break; 1441 1442 1443 default: 1444 error = scsipi_do_ioctl(st->sc_periph, dev, cmd, arg, 1445 flag, p); 1446 break; 1447 } 1448 return (error); 1449 /*-----------------------------*/ 1450 try_new_value: 1451 /* 1452 * Check that the mode being asked for is aggreeable to the 1453 * drive. If not, put it back the way it was. 1454 * 1455 * If in control mode, we can make (persistent) mode changes 1456 * even if no medium is loaded (see st(4)). 1457 */ 1458 if ((STMODE(dev) != CTRL_MODE || (st->flags & ST_MOUNTED) != 0) && 1459 (error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 1460 /* put it back as it was */ 1461 printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); 1462 st->density = hold_density; 1463 st->blksize = hold_blksize; 1464 if (st->blksize) 1465 st->flags |= ST_FIXEDBLOCKS; 1466 else 1467 st->flags &= ~ST_FIXEDBLOCKS; 1468 return (error); 1469 } 1470 /* 1471 * As the drive liked it, if we are setting a new default, 1472 * set it into the structures as such. 1473 * 1474 * The means for deciding this are not finalised yet- but 1475 * if the device was opened in Control Mode, the values 1476 * are persistent now across mounts. 1477 */ 1478 if (STMODE(dev) == CTRL_MODE) { 1479 switch ((short) (mt->mt_op)) { 1480 case MTSETBSIZ: 1481 st->modes[dsty].blksize = st->blksize; 1482 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1483 break; 1484 case MTSETDNSTY: 1485 st->modes[dsty].density = st->density; 1486 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1487 break; 1488 } 1489 } 1490 return (0); 1491 } 1492 1493 /* 1494 * Do a synchronous read. 1495 */ 1496 int 1497 st_read(st, buf, size, flags) 1498 struct st_softc *st; 1499 int size; 1500 int flags; 1501 char *buf; 1502 { 1503 struct scsi_rw_tape cmd; 1504 1505 /* 1506 * If it's a null transfer, return immediatly 1507 */ 1508 if (size == 0) 1509 return (0); 1510 memset(&cmd, 0, sizeof(cmd)); 1511 cmd.opcode = READ; 1512 if (st->flags & ST_FIXEDBLOCKS) { 1513 cmd.byte2 |= SRW_FIXED; 1514 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1515 cmd.len); 1516 } else 1517 _lto3b(size, cmd.len); 1518 return (scsipi_command(st->sc_periph, 1519 (struct scsipi_generic *)&cmd, sizeof(cmd), 1520 (u_char *)buf, size, 0, ST_IO_TIME, NULL, flags | XS_CTL_DATA_IN)); 1521 } 1522 1523 /* 1524 * issue an erase command 1525 */ 1526 int 1527 st_erase(st, full, flags) 1528 struct st_softc *st; 1529 int full, flags; 1530 { 1531 int tmo; 1532 struct scsi_erase cmd; 1533 1534 /* 1535 * Full erase means set LONG bit in erase command, which asks 1536 * the drive to erase the entire unit. Without this bit, we're 1537 * asking the drive to write an erase gap. 1538 */ 1539 memset(&cmd, 0, sizeof(cmd)); 1540 cmd.opcode = ERASE; 1541 if (full) { 1542 cmd.byte2 = SE_LONG; 1543 tmo = ST_SPC_TIME; 1544 } else { 1545 tmo = ST_IO_TIME; 1546 } 1547 1548 /* 1549 * XXX We always do this asynchronously, for now, unless the device 1550 * has the ST_Q_ERASE_NOIMM quirk. How long should we wait if we 1551 * want to (eventually) to it synchronously? 1552 */ 1553 if ((st->quirks & ST_Q_ERASE_NOIMM) == 0) 1554 cmd.byte2 |= SE_IMMED; 1555 1556 return (scsipi_command(st->sc_periph, 1557 (struct scsipi_generic *)&cmd, sizeof(cmd), 1558 0, 0, ST_RETRIES, tmo, NULL, flags)); 1559 } 1560 1561 /* 1562 * skip N blocks/filemarks/seq filemarks/eom 1563 */ 1564 int 1565 st_space(st, number, what, flags) 1566 struct st_softc *st; 1567 u_int what; 1568 int flags; 1569 int number; 1570 { 1571 struct scsi_space cmd; 1572 int error; 1573 1574 switch (what) { 1575 case SP_BLKS: 1576 if (st->flags & ST_PER_ACTION) { 1577 if (number > 0) { 1578 st->flags &= ~ST_PER_ACTION; 1579 return (EIO); 1580 } else if (number < 0) { 1581 if (st->flags & ST_AT_FILEMARK) { 1582 /* 1583 * Handling of ST_AT_FILEMARK 1584 * in st_space will fill in the 1585 * right file mark count. 1586 */ 1587 error = st_space(st, 0, SP_FILEMARKS, 1588 flags); 1589 if (error) 1590 return (error); 1591 } 1592 if (st->flags & ST_BLANK_READ) { 1593 st->flags &= ~ST_BLANK_READ; 1594 return (EIO); 1595 } 1596 st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); 1597 } 1598 } 1599 break; 1600 case SP_FILEMARKS: 1601 if (st->flags & ST_EIO_PENDING) { 1602 if (number > 0) { 1603 /* pretend we just discovered the error */ 1604 st->flags &= ~ST_EIO_PENDING; 1605 return (EIO); 1606 } else if (number < 0) { 1607 /* back away from the error */ 1608 st->flags &= ~ST_EIO_PENDING; 1609 } 1610 } 1611 if (st->flags & ST_AT_FILEMARK) { 1612 st->flags &= ~ST_AT_FILEMARK; 1613 number--; 1614 } 1615 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 1616 /* back away from unwritten tape */ 1617 st->flags &= ~ST_BLANK_READ; 1618 number++; /* XXX dubious */ 1619 } 1620 break; 1621 case SP_EOM: 1622 if (st->flags & ST_EOM_PENDING) { 1623 /* we're already there */ 1624 st->flags &= ~ST_EOM_PENDING; 1625 return (0); 1626 } 1627 if (st->flags & ST_EIO_PENDING) { 1628 /* pretend we just discovered the error */ 1629 st->flags &= ~ST_EIO_PENDING; 1630 return (EIO); 1631 } 1632 if (st->flags & ST_AT_FILEMARK) 1633 st->flags &= ~ST_AT_FILEMARK; 1634 break; 1635 } 1636 if (number == 0) 1637 return (0); 1638 1639 memset(&cmd, 0, sizeof(cmd)); 1640 cmd.opcode = SPACE; 1641 cmd.byte2 = what; 1642 _lto3b(number, cmd.number); 1643 1644 return (scsipi_command(st->sc_periph, 1645 (struct scsipi_generic *)&cmd, sizeof(cmd), 1646 0, 0, 0, ST_SPC_TIME, NULL, flags)); 1647 } 1648 1649 /* 1650 * write N filemarks 1651 */ 1652 int 1653 st_write_filemarks(st, number, flags) 1654 struct st_softc *st; 1655 int flags; 1656 int number; 1657 { 1658 struct scsi_write_filemarks cmd; 1659 1660 /* 1661 * It's hard to write a negative number of file marks. 1662 * Don't try. 1663 */ 1664 if (number < 0) 1665 return (EINVAL); 1666 switch (number) { 1667 case 0: /* really a command to sync the drive's buffers */ 1668 break; 1669 case 1: 1670 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 1671 st->flags &= ~ST_WRITTEN; 1672 else 1673 st->flags |= ST_FM_WRITTEN; 1674 st->flags &= ~ST_PER_ACTION; 1675 break; 1676 default: 1677 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 1678 } 1679 1680 memset(&cmd, 0, sizeof(cmd)); 1681 cmd.opcode = WRITE_FILEMARKS; 1682 _lto3b(number, cmd.number); 1683 1684 return (scsipi_command(st->sc_periph, 1685 (struct scsipi_generic *)&cmd, sizeof(cmd), 1686 0, 0, 0, ST_IO_TIME * 4, NULL, flags)); 1687 } 1688 1689 /* 1690 * Make sure the right number of file marks is on tape if the 1691 * tape has been written. If the position argument is true, 1692 * leave the tape positioned where it was originally. 1693 * 1694 * nmarks returns the number of marks to skip (or, if position 1695 * true, which were skipped) to get back original position. 1696 */ 1697 int 1698 st_check_eod(st, position, nmarks, flags) 1699 struct st_softc *st; 1700 boolean position; 1701 int *nmarks; 1702 int flags; 1703 { 1704 int error; 1705 1706 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 1707 default: 1708 *nmarks = 0; 1709 return (0); 1710 case ST_WRITTEN: 1711 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 1712 *nmarks = 1; 1713 break; 1714 case ST_WRITTEN | ST_2FM_AT_EOD: 1715 *nmarks = 2; 1716 } 1717 error = st_write_filemarks(st, *nmarks, flags); 1718 if (position && !error) 1719 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 1720 return (error); 1721 } 1722 1723 /* 1724 * load/unload/retension 1725 */ 1726 int 1727 st_load(st, type, flags) 1728 struct st_softc *st; 1729 u_int type; 1730 int flags; 1731 { 1732 int error; 1733 struct scsi_load cmd; 1734 1735 if (type != LD_LOAD) { 1736 int nmarks; 1737 1738 error = st_check_eod(st, FALSE, &nmarks, flags); 1739 if (error) { 1740 printf("%s: failed to write closing filemarks at " 1741 "unload, errno=%d\n", st->sc_dev.dv_xname, error); 1742 return (error); 1743 } 1744 } 1745 if (st->quirks & ST_Q_IGNORE_LOADS) { 1746 if (type == LD_LOAD) { 1747 /* 1748 * If we ignore loads, at least we should try a rewind. 1749 */ 1750 return st_rewind(st, 0, flags); 1751 } 1752 /* otherwise, we should do what's asked of us */ 1753 } 1754 1755 memset(&cmd, 0, sizeof(cmd)); 1756 cmd.opcode = LOAD; 1757 cmd.how = type; 1758 1759 error = scsipi_command(st->sc_periph, 1760 (struct scsipi_generic *)&cmd, sizeof(cmd), 1761 0, 0, ST_RETRIES, ST_SPC_TIME, NULL, flags); 1762 if (error) { 1763 printf("%s: error %d in st_load (op %d)\n", 1764 st->sc_dev.dv_xname, error, type); 1765 } 1766 return (error); 1767 } 1768 1769 /* 1770 * Rewind the device 1771 */ 1772 int 1773 st_rewind(st, immediate, flags) 1774 struct st_softc *st; 1775 u_int immediate; 1776 int flags; 1777 { 1778 struct scsi_rewind cmd; 1779 int error; 1780 int nmarks; 1781 1782 error = st_check_eod(st, FALSE, &nmarks, flags); 1783 if (error) { 1784 printf("%s: failed to write closing filemarks at " 1785 "rewind, errno=%d\n", st->sc_dev.dv_xname, error); 1786 return (error); 1787 } 1788 st->flags &= ~ST_PER_ACTION; 1789 1790 /* 1791 * ATAPI tapes always need foo to be set 1792 */ 1793 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1794 immediate = SR_IMMED; 1795 1796 memset(&cmd, 0, sizeof(cmd)); 1797 cmd.opcode = REWIND; 1798 cmd.byte2 = immediate; 1799 1800 error = scsipi_command(st->sc_periph, 1801 (struct scsipi_generic *)&cmd, sizeof(cmd), 0, 0, ST_RETRIES, 1802 immediate ? ST_CTL_TIME: ST_SPC_TIME, NULL, flags); 1803 if (error) { 1804 printf("%s: error %d trying to rewind\n", 1805 st->sc_dev.dv_xname, error); 1806 } 1807 return (error); 1808 } 1809 1810 int 1811 st_rdpos(st, hard, blkptr) 1812 struct st_softc *st; 1813 int hard; 1814 u_int32_t *blkptr; 1815 { 1816 int error; 1817 u_int8_t posdata[20]; 1818 struct scsi_tape_read_position cmd; 1819 1820 /* 1821 * First flush any pending writes... 1822 */ 1823 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 1824 1825 /* 1826 * The latter case is for 'write protected' tapes 1827 * which are too stupid to recognize a zero count 1828 * for writing filemarks as a no-op. 1829 */ 1830 if (error != 0 && error != EACCES && error != EROFS) 1831 return (error); 1832 1833 memset(&cmd, 0, sizeof(cmd)); 1834 memset(&posdata, 0, sizeof(posdata)); 1835 cmd.opcode = READ_POSITION; 1836 if (hard) 1837 cmd.byte1 = 1; 1838 1839 error = scsipi_command(st->sc_periph, 1840 (struct scsipi_generic *)&cmd, sizeof(cmd), (u_char *)&posdata, 1841 sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, 1842 XS_CTL_SILENT | XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); 1843 1844 if (error == 0) { 1845 #if 0 1846 printf("posdata:"); 1847 for (hard = 0; hard < sizeof(posdata); hard++) 1848 printf("%02x ", posdata[hard] & 0xff); 1849 printf("\n"); 1850 #endif 1851 if (posdata[0] & 0x4) /* Block Position Unknown */ 1852 error = EINVAL; 1853 else 1854 *blkptr = _4btol(&posdata[4]); 1855 } 1856 return (error); 1857 } 1858 1859 int 1860 st_setpos(st, hard, blkptr) 1861 struct st_softc *st; 1862 int hard; 1863 u_int32_t *blkptr; 1864 { 1865 int error; 1866 struct scsi_tape_locate cmd; 1867 1868 /* 1869 * First flush any pending writes. Strictly speaking, 1870 * we're not supposed to have to worry about this, 1871 * but let's be untrusting. 1872 */ 1873 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 1874 1875 /* 1876 * The latter case is for 'write protected' tapes 1877 * which are too stupid to recognize a zero count 1878 * for writing filemarks as a no-op. 1879 */ 1880 if (error != 0 && error != EACCES && error != EROFS) 1881 return (error); 1882 1883 memset(&cmd, 0, sizeof(cmd)); 1884 cmd.opcode = LOCATE; 1885 if (hard) 1886 cmd.byte2 = 1 << 2; 1887 _lto4b(*blkptr, cmd.blkaddr); 1888 error = scsipi_command(st->sc_periph, 1889 (struct scsipi_generic *)&cmd, sizeof(cmd), 1890 NULL, 0, ST_RETRIES, ST_SPC_TIME, NULL, 0); 1891 /* 1892 * XXX: Note file && block number position now unknown (if 1893 * XXX: these things ever start being maintained in this driver) 1894 */ 1895 return (error); 1896 } 1897 1898 1899 /* 1900 * Look at the returned sense and act on the error and determine 1901 * the unix error number to pass back..., 0 (== report no error), 1902 * -1 = retry the operation, -2 continue error processing. 1903 */ 1904 int 1905 st_interpret_sense(xs) 1906 struct scsipi_xfer *xs; 1907 { 1908 struct scsipi_periph *periph = xs->xs_periph; 1909 struct scsipi_sense_data *sense = &xs->sense.scsi_sense; 1910 struct buf *bp = xs->bp; 1911 struct st_softc *st = (void *)periph->periph_dev; 1912 int retval = EJUSTRETURN; 1913 int doprint = ((xs->xs_control & XS_CTL_SILENT) == 0); 1914 u_int8_t key; 1915 int32_t info; 1916 1917 /* 1918 * If it isn't a extended or extended/deferred error, let 1919 * the generic code handle it. 1920 */ 1921 if ((sense->error_code & SSD_ERRCODE) != 0x70 && 1922 (sense->error_code & SSD_ERRCODE) != 0x71) { /* DEFFERRED */ 1923 return (retval); 1924 } 1925 1926 if (sense->error_code & SSD_ERRCODE_VALID) 1927 info = _4btol(sense->info); 1928 else 1929 info = xs->datalen; /* bad choice if fixed blocks */ 1930 key = sense->flags & SSD_KEY; 1931 st->mt_erreg = key; 1932 st->asc = sense->add_sense_code; 1933 st->ascq = sense->add_sense_code_qual; 1934 st->mt_resid = (short) info; 1935 1936 /* 1937 * If the device is not open yet, let generic handle 1938 */ 1939 if ((periph->periph_flags & PERIPH_OPEN) == 0) { 1940 return (retval); 1941 } 1942 1943 1944 if (st->flags & ST_FIXEDBLOCKS) { 1945 xs->resid = info * st->blksize; 1946 if (sense->flags & SSD_EOM) { 1947 if ((st->flags & ST_EARLYWARN) == 0) 1948 st->flags |= ST_EIO_PENDING; 1949 st->flags |= ST_EOM_PENDING; 1950 if (bp) 1951 bp->b_resid = xs->resid; 1952 } 1953 if (sense->flags & SSD_FILEMARK) { 1954 st->flags |= ST_AT_FILEMARK; 1955 if (bp) 1956 bp->b_resid = xs->resid; 1957 } 1958 if (sense->flags & SSD_ILI) { 1959 st->flags |= ST_EIO_PENDING; 1960 if (bp) 1961 bp->b_resid = xs->resid; 1962 if (sense->error_code & SSD_ERRCODE_VALID && 1963 (xs->xs_control & XS_CTL_SILENT) == 0) 1964 printf("%s: block wrong size, %d blocks " 1965 "residual\n", st->sc_dev.dv_xname, info); 1966 1967 /* 1968 * This quirk code helps the drive read 1969 * the first tape block, regardless of 1970 * format. That is required for these 1971 * drives to return proper MODE SENSE 1972 * information. 1973 */ 1974 if ((st->quirks & ST_Q_SENSE_HELP) && 1975 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 1976 st->blksize -= 512; 1977 } 1978 /* 1979 * If data wanted and no data was transferred, do it immediately 1980 */ 1981 if (xs->datalen && xs->resid >= xs->datalen) { 1982 if (st->flags & ST_EIO_PENDING) 1983 return (EIO); 1984 if (st->flags & ST_AT_FILEMARK) { 1985 if (bp) 1986 bp->b_resid = xs->resid; 1987 return (0); 1988 } 1989 } 1990 } else { /* must be variable mode */ 1991 if (sense->flags & SSD_EOM) { 1992 /* 1993 * The current semantics of this 1994 * driver requires EOM detection 1995 * to return EIO unless early 1996 * warning detection is enabled 1997 * for variable mode (this is always 1998 * on for fixed block mode). 1999 */ 2000 if (st->flags & ST_EARLYWARN) { 2001 st->flags |= ST_EOM_PENDING; 2002 retval = 0; 2003 } else { 2004 retval = EIO; 2005 } 2006 2007 /* 2008 * If it's an unadorned EOM detection, 2009 * suppress printing an error. 2010 */ 2011 if (key == SKEY_NO_SENSE) { 2012 doprint = 0; 2013 } 2014 } else if (sense->flags & SSD_FILEMARK) { 2015 retval = 0; 2016 } else if (sense->flags & SSD_ILI) { 2017 if (info < 0) { 2018 /* 2019 * The tape record was bigger than the read 2020 * we issued. 2021 */ 2022 if ((xs->xs_control & XS_CTL_SILENT) == 0) { 2023 printf("%s: %d-byte tape record too big" 2024 " for %d-byte user buffer\n", 2025 st->sc_dev.dv_xname, 2026 xs->datalen - info, xs->datalen); 2027 } 2028 retval = EIO; 2029 } else { 2030 retval = 0; 2031 } 2032 } 2033 xs->resid = info; 2034 if (bp) 2035 bp->b_resid = info; 2036 } 2037 2038 #ifndef SCSIPI_DEBUG 2039 if (retval == 0 && key == SKEY_NO_SENSE) 2040 doprint = 0; 2041 #endif 2042 if (key == SKEY_BLANK_CHECK) { 2043 /* 2044 * This quirk code helps the drive read the 2045 * first tape block, regardless of format. That 2046 * is required for these drives to return proper 2047 * MODE SENSE information. 2048 */ 2049 if ((st->quirks & ST_Q_SENSE_HELP) && 2050 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 2051 /* still starting */ 2052 st->blksize -= 512; 2053 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 2054 st->flags |= ST_BLANK_READ; 2055 xs->resid = xs->datalen; 2056 if (bp) { 2057 bp->b_resid = xs->resid; 2058 /* return an EOF */ 2059 } 2060 retval = 0; 2061 } 2062 } 2063 2064 /* 2065 * If generic sense processing will continue, we should not 2066 * print sense info here. 2067 */ 2068 if (retval == EJUSTRETURN) 2069 doprint = 0; 2070 2071 if (doprint) { 2072 #ifdef SCSIVERBOSE 2073 scsipi_print_sense(xs, 0); 2074 #else 2075 scsipi_printaddr(periph); 2076 printf("Sense Key 0x%02x", key); 2077 if ((sense->error_code & SSD_ERRCODE_VALID) != 0) { 2078 switch (key) { 2079 case SKEY_NOT_READY: 2080 case SKEY_ILLEGAL_REQUEST: 2081 case SKEY_UNIT_ATTENTION: 2082 case SKEY_WRITE_PROTECT: 2083 break; 2084 case SKEY_BLANK_CHECK: 2085 printf(", requested size: %d (decimal)", info); 2086 break; 2087 case SKEY_ABORTED_COMMAND: 2088 if (xs->xs_retries) 2089 printf(", retrying"); 2090 printf(", cmd 0x%x, info 0x%x", 2091 xs->cmd->opcode, info); 2092 break; 2093 default: 2094 printf(", info = %d (decimal)", info); 2095 } 2096 } 2097 if (sense->extra_len != 0) { 2098 int n; 2099 printf(", data ="); 2100 for (n = 0; n < sense->extra_len; n++) 2101 printf(" %02x", sense->cmd_spec_info[n]); 2102 } 2103 printf("\n"); 2104 #endif 2105 } 2106 return (retval); 2107 } 2108 2109 /* 2110 * The quirk here is that the drive returns some value to st_mode_sense 2111 * incorrectly until the tape has actually passed by the head. 2112 * 2113 * The method is to set the drive to large fixed-block state (user-specified 2114 * density and 1024-byte blocks), then read and rewind to get it to sense the 2115 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 2116 * work, as a last resort, try variable- length blocks. The result will be 2117 * the ability to do an accurate st_mode_sense. 2118 * 2119 * We know we can do a rewind because we just did a load, which implies rewind. 2120 * Rewind seems preferable to space backward if we have a virgin tape. 2121 * 2122 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 2123 * error processing, both part of st_interpret_sense. 2124 */ 2125 int 2126 st_touch_tape(st) 2127 struct st_softc *st; 2128 { 2129 char *buf; 2130 int readsize; 2131 int error; 2132 2133 buf = malloc(1024, M_TEMP, M_NOWAIT); 2134 if (buf == NULL) 2135 return (ENOMEM); 2136 2137 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 2138 goto bad; 2139 2140 /* 2141 * If the block size is already known from the 2142 * sense data, use it. Else start probing at 1024. 2143 */ 2144 if (st->media_blksize > 0) 2145 st->blksize = st->media_blksize; 2146 else 2147 st->blksize = 1024; 2148 2149 do { 2150 switch (st->blksize) { 2151 case 512: 2152 case 1024: 2153 readsize = st->blksize; 2154 st->flags |= ST_FIXEDBLOCKS; 2155 break; 2156 default: 2157 readsize = 1; 2158 st->flags &= ~ST_FIXEDBLOCKS; 2159 } 2160 if ((error = st->ops(st, ST_OPS_MODESELECT, XS_CTL_SILENT)) 2161 != 0) { 2162 /* 2163 * The device did not agree with the proposed 2164 * block size. If we exhausted our options, 2165 * return failure, else try another. 2166 */ 2167 if (readsize == 1) 2168 goto bad; 2169 st->blksize -= 512; 2170 continue; 2171 } 2172 st_read(st, buf, readsize, XS_CTL_SILENT); /* XXX */ 2173 if ((error = st_rewind(st, 0, 0)) != 0) { 2174 bad: free(buf, M_TEMP); 2175 return (error); 2176 } 2177 } while (readsize != 1 && readsize > st->blksize); 2178 2179 free(buf, M_TEMP); 2180 return (0); 2181 } 2182 2183 int 2184 stdump(dev, blkno, va, size) 2185 dev_t dev; 2186 daddr_t blkno; 2187 caddr_t va; 2188 size_t size; 2189 { 2190 2191 /* Not implemented. */ 2192 return (ENXIO); 2193 } 2194