1 /* $NetBSD: st.c,v 1.144 2001/11/13 06:56:41 lukem 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 <sys/cdefs.h> 60 __KERNEL_RCSID(0, "$NetBSD: st.c,v 1.144 2001/11/13 06:56:41 lukem Exp $"); 61 62 #include "opt_scsi.h" 63 64 #include <sys/types.h> 65 #include <sys/param.h> 66 #include <sys/systm.h> 67 #include <sys/fcntl.h> 68 #include <sys/errno.h> 69 #include <sys/ioctl.h> 70 #include <sys/malloc.h> 71 #include <sys/buf.h> 72 #include <sys/proc.h> 73 #include <sys/user.h> 74 #include <sys/mtio.h> 75 #include <sys/device.h> 76 #include <sys/conf.h> 77 #include <sys/kernel.h> 78 79 #include <dev/scsipi/scsi_all.h> 80 #include <dev/scsipi/scsi_tape.h> 81 #include <dev/scsipi/stvar.h> 82 83 /* Defines for device specific stuff */ 84 #define DEF_FIXED_BSIZE 512 85 86 #define STMODE(z) ( minor(z) & 0x03) 87 #define STDSTY(z) ((minor(z) >> 2) & 0x03) 88 #define STUNIT(z) ((minor(z) >> 4) ) 89 90 #define NORMAL_MODE 0 91 #define NOREW_MODE 1 92 #define EJECT_MODE 2 93 #define CTRL_MODE 3 94 95 #define FALSE 0 96 #define TRUE 1 97 98 #ifndef ST_MOUNT_DELAY 99 #define ST_MOUNT_DELAY 0 100 #endif 101 102 /* 103 * Define various devices that we know mis-behave in some way, 104 * and note how they are bad, so we can correct for them 105 */ 106 107 const struct st_quirk_inquiry_pattern st_quirk_patterns[] = { 108 {{T_SEQUENTIAL, T_REMOV, 109 " ", " ", " "}, {0, 0, { 110 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 111 {ST_Q_FORCE_BLKSIZE, 512, QIC_24}, /* minor 4-7 */ 112 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_1600}, /* minor 8-11 */ 113 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_6250} /* minor 12-15 */ 114 }}}, 115 {{T_SEQUENTIAL, T_REMOV, 116 "TANDBERG", " TDC 3600 ", ""}, {0, 12, { 117 {0, 0, 0}, /* minor 0-3 */ 118 {ST_Q_FORCE_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 119 {0, 0, QIC_150}, /* minor 8-11 */ 120 {0, 0, QIC_120} /* minor 12-15 */ 121 }}}, 122 {{T_SEQUENTIAL, T_REMOV, 123 "TANDBERG", " TDC 3800 ", ""}, {0, 0, { 124 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 125 {0, 0, QIC_525}, /* minor 4-7 */ 126 {0, 0, QIC_150}, /* minor 8-11 */ 127 {0, 0, QIC_120} /* minor 12-15 */ 128 }}}, 129 /* 130 * lacking a manual for the 4200, it's not clear what the 131 * specific density codes should be- the device is a 2.5GB 132 * capable QIC drive, those density codes aren't readily 133 * availabel. The 'default' will just have to do. 134 */ 135 {{T_SEQUENTIAL, T_REMOV, 136 "TANDBERG", " TDC 4200 ", ""}, {0, 0, { 137 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 138 {0, 0, QIC_525}, /* minor 4-7 */ 139 {0, 0, QIC_150}, /* minor 8-11 */ 140 {0, 0, QIC_120} /* minor 12-15 */ 141 }}}, 142 /* 143 * At least -005 and -007 need this. I'll assume they all do unless I 144 * hear otherwise. - mycroft, 31MAR1994 145 */ 146 {{T_SEQUENTIAL, T_REMOV, 147 "ARCHIVE ", "VIPER 2525 25462", ""}, {0, 0, { 148 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 149 {ST_Q_SENSE_HELP, 0, QIC_525}, /* minor 4-7 */ 150 {0, 0, QIC_150}, /* minor 8-11 */ 151 {0, 0, QIC_120} /* minor 12-15 */ 152 }}}, 153 /* 154 * One user reports that this works for his tape drive. It probably 155 * needs more work. - mycroft, 09APR1994 156 */ 157 {{T_SEQUENTIAL, T_REMOV, 158 "SANKYO ", "CP525 ", ""}, {0, 0, { 159 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 160 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 161 {0, 0, QIC_150}, /* minor 8-11 */ 162 {0, 0, QIC_120} /* minor 12-15 */ 163 }}}, 164 {{T_SEQUENTIAL, T_REMOV, 165 "ANRITSU ", "DMT780 ", ""}, {0, 0, { 166 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 167 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 168 {0, 0, QIC_150}, /* minor 8-11 */ 169 {0, 0, QIC_120} /* minor 12-15 */ 170 }}}, 171 {{T_SEQUENTIAL, T_REMOV, 172 "ARCHIVE ", "VIPER 150 21247", ""}, {ST_Q_ERASE_NOIMM, 12, { 173 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 174 {0, 0, QIC_150}, /* minor 4-7 */ 175 {0, 0, QIC_120}, /* minor 8-11 */ 176 {0, 0, QIC_24} /* minor 12-15 */ 177 }}}, 178 {{T_SEQUENTIAL, T_REMOV, 179 "ARCHIVE ", "VIPER 150 21531", ""}, {ST_Q_ERASE_NOIMM, 12, { 180 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 181 {0, 0, QIC_150}, /* minor 4-7 */ 182 {0, 0, QIC_120}, /* minor 8-11 */ 183 {0, 0, QIC_24} /* minor 12-15 */ 184 }}}, 185 {{T_SEQUENTIAL, T_REMOV, 186 "WANGTEK ", "5099ES SCSI", ""}, {0, 0, { 187 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 188 {0, 0, QIC_11}, /* minor 4-7 */ 189 {0, 0, QIC_24}, /* minor 8-11 */ 190 {0, 0, QIC_24} /* minor 12-15 */ 191 }}}, 192 {{T_SEQUENTIAL, T_REMOV, 193 "WANGTEK ", "5150ES SCSI", ""}, {0, 0, { 194 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 195 {0, 0, QIC_24}, /* minor 4-7 */ 196 {0, 0, QIC_120}, /* minor 8-11 */ 197 {0, 0, QIC_150} /* minor 12-15 */ 198 }}}, 199 {{T_SEQUENTIAL, T_REMOV, 200 "WANGTEK ", "5525ES SCSI REV7", ""}, {0, 0, { 201 {0, 0, 0}, /* minor 0-3 */ 202 {ST_Q_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 203 {0, 0, QIC_150}, /* minor 8-11 */ 204 {0, 0, QIC_120} /* minor 12-15 */ 205 }}}, 206 {{T_SEQUENTIAL, T_REMOV, 207 "WangDAT ", "Model 1300 ", ""}, {0, 0, { 208 {0, 0, 0}, /* minor 0-3 */ 209 {ST_Q_FORCE_BLKSIZE, 512, DDS}, /* minor 4-7 */ 210 {ST_Q_FORCE_BLKSIZE, 1024, DDS}, /* minor 8-11 */ 211 {ST_Q_FORCE_BLKSIZE, 0, DDS} /* minor 12-15 */ 212 }}}, 213 {{T_SEQUENTIAL, T_REMOV, 214 "EXABYTE ", "EXB-8200 ", "263H"}, {0, 5, { 215 {0, 0, 0}, /* minor 0-3 */ 216 {0, 0, 0}, /* minor 4-7 */ 217 {0, 0, 0}, /* minor 8-11 */ 218 {0, 0, 0} /* minor 12-15 */ 219 }}}, 220 {{T_SEQUENTIAL, T_REMOV, 221 "STK", "9490", ""}, 222 {ST_Q_FORCE_BLKSIZE, 0, { 223 {0, 0, 0}, /* minor 0-3 */ 224 {0, 0, 0}, /* minor 4-7 */ 225 {0, 0, 0}, /* minor 8-11 */ 226 {0, 0, 0} /* minor 12-15 */ 227 }}}, 228 {{T_SEQUENTIAL, T_REMOV, 229 "STK", "SD-3", ""}, 230 {ST_Q_FORCE_BLKSIZE, 0, { 231 {0, 0, 0}, /* minor 0-3 */ 232 {0, 0, 0}, /* minor 4-7 */ 233 {0, 0, 0}, /* minor 8-11 */ 234 {0, 0, 0} /* minor 12-15 */ 235 }}}, 236 {{T_SEQUENTIAL, T_REMOV, 237 "IBM", "03590", ""}, {ST_Q_IGNORE_LOADS, 0, { 238 {0, 0, 0}, /* minor 0-3 */ 239 {0, 0, 0}, /* minor 4-7 */ 240 {0, 0, 0}, /* minor 8-11 */ 241 {0, 0, 0} /* minor 12-15 */ 242 }}}, 243 {{T_SEQUENTIAL, T_REMOV, 244 "HP ", "T4000s ", ""}, {ST_Q_UNIMODAL, 0, { 245 {0, 0, QIC_3095}, /* minor 0-3 */ 246 {0, 0, QIC_3095}, /* minor 4-7 */ 247 {0, 0, QIC_3095}, /* minor 8-11 */ 248 {0, 0, QIC_3095}, /* minor 12-15 */ 249 }}}, 250 #if 0 251 {{T_SEQUENTIAL, T_REMOV, 252 "EXABYTE ", "EXB-8200 ", ""}, {0, 12, { 253 {0, 0, 0}, /* minor 0-3 */ 254 {0, 0, 0}, /* minor 4-7 */ 255 {0, 0, 0}, /* minor 8-11 */ 256 {0, 0, 0} /* minor 12-15 */ 257 }}}, 258 #endif 259 {{T_SEQUENTIAL, T_REMOV, 260 "TEAC ", "MT-2ST/N50 ", ""}, {ST_Q_IGNORE_LOADS, 0, { 261 {0, 0, 0}, /* minor 0-3 */ 262 {0, 0, 0}, /* minor 4-7 */ 263 {0, 0, 0}, /* minor 8-11 */ 264 {0, 0, 0} /* minor 12-15 */ 265 }}}, 266 {{T_SEQUENTIAL, T_REMOV, 267 "OnStream", "ADR50 Drive", ""}, {ST_Q_UNIMODAL, 0, { 268 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 269 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 4-7 */ 270 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 8-11 */ 271 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 12-15 */ 272 }}}, 273 {{T_SEQUENTIAL, T_REMOV, 274 "NCR H621", "0-STD-03-46F880 ", ""}, {ST_Q_NOPREVENT, 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 "OnStream DI-30", "", "1.0"}, {ST_Q_IGNORE_LOADS, 0, { 282 {0, 0, 0}, /* minor 0-3 */ 283 {0, 0, 0}, /* minor 4-7 */ 284 {0, 0, 0}, /* minor 8-11 */ 285 {0, 0, 0} /* minor 12-15 */ 286 }}}, 287 }; 288 289 #define NOEJECT 0 290 #define EJECT 1 291 292 void st_identify_drive __P((struct st_softc *, 293 struct scsipi_inquiry_pattern *)); 294 void st_loadquirks __P((struct st_softc *)); 295 int st_mount_tape __P((dev_t, int)); 296 void st_unmount __P((struct st_softc *, boolean)); 297 int st_decide_mode __P((struct st_softc *, boolean)); 298 void ststart __P((struct scsipi_periph *)); 299 void stdone __P((struct scsipi_xfer *)); 300 int st_read __P((struct st_softc *, char *, int, int)); 301 int st_space __P((struct st_softc *, int, u_int, int)); 302 int st_write_filemarks __P((struct st_softc *, int, int)); 303 int st_check_eod __P((struct st_softc *, boolean, int *, int)); 304 int st_load __P((struct st_softc *, u_int, int)); 305 int st_rewind __P((struct st_softc *, u_int, int)); 306 int st_interpret_sense __P((struct scsipi_xfer *)); 307 int st_touch_tape __P((struct st_softc *)); 308 int st_erase __P((struct st_softc *, int full, int flags)); 309 int st_rdpos __P((struct st_softc *, int, u_int32_t *)); 310 int st_setpos __P((struct st_softc *, int, u_int32_t *)); 311 312 const struct scsipi_periphsw st_switch = { 313 st_interpret_sense, 314 ststart, 315 NULL, 316 stdone 317 }; 318 319 #if defined(ST_ENABLE_EARLYWARN) 320 #define ST_INIT_FLAGS ST_EARLYWARN 321 #else 322 #define ST_INIT_FLAGS 0 323 #endif 324 325 /* 326 * The routine called by the low level scsi routine when it discovers 327 * A device suitable for this driver 328 */ 329 void 330 stattach(parent, st, aux) 331 struct device *parent; 332 struct st_softc *st; 333 void *aux; 334 { 335 struct scsipibus_attach_args *sa = aux; 336 struct scsipi_periph *periph = sa->sa_periph; 337 338 SC_DEBUG(periph, SCSIPI_DB2, ("stattach: ")); 339 340 /* 341 * Store information needed to contact our base driver 342 */ 343 st->sc_periph = periph; 344 periph->periph_dev = &st->sc_dev; 345 periph->periph_switch = &st_switch; 346 347 /* 348 * Set initial flags 349 */ 350 351 st->flags = ST_INIT_FLAGS; 352 353 /* 354 * Check if the drive is a known criminal and take 355 * Any steps needed to bring it into line 356 */ 357 st_identify_drive(st, &sa->sa_inqbuf); 358 /* 359 * Use the subdriver to request information regarding the drive. 360 */ 361 printf("\n"); 362 printf("%s: %s", st->sc_dev.dv_xname, st->quirkdata ? "rogue, " : ""); 363 if (scsipi_test_unit_ready(periph, 364 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE) || 365 st->ops(st, ST_OPS_MODESENSE, 366 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE)) 367 printf("drive empty\n"); 368 else { 369 printf("density code %d, ", st->media_density); 370 if (st->media_blksize > 0) 371 printf("%d-byte", st->media_blksize); 372 else 373 printf("variable"); 374 printf(" blocks, write-%s\n", 375 (st->flags & ST_READONLY) ? "protected" : "enabled"); 376 } 377 378 /* 379 * Set up the buf queue for this device 380 */ 381 BUFQ_INIT(&st->buf_queue); 382 383 #if NRND > 0 384 rnd_attach_source(&st->rnd_source, st->sc_dev.dv_xname, 385 RND_TYPE_TAPE, 0); 386 #endif 387 } 388 389 /* 390 * Use the inquiry routine in 'scsi_base' to get drive info so we can 391 * Further tailor our behaviour. 392 */ 393 void 394 st_identify_drive(st, inqbuf) 395 struct st_softc *st; 396 struct scsipi_inquiry_pattern *inqbuf; 397 { 398 struct st_quirk_inquiry_pattern *finger; 399 int priority; 400 401 finger = (struct st_quirk_inquiry_pattern *)scsipi_inqmatch(inqbuf, 402 (caddr_t)st_quirk_patterns, 403 sizeof(st_quirk_patterns) / sizeof(st_quirk_patterns[0]), 404 sizeof(st_quirk_patterns[0]), &priority); 405 if (priority != 0) { 406 st->quirkdata = &finger->quirkdata; 407 st->drive_quirks = finger->quirkdata.quirks; 408 st->quirks = finger->quirkdata.quirks; /* start value */ 409 st->page_0_size = finger->quirkdata.page_0_size; 410 st_loadquirks(st); 411 } 412 } 413 414 /* 415 * initialise the subdevices to the default (QUIRK) state. 416 * this will remove any setting made by the system operator or previous 417 * operations. 418 */ 419 void 420 st_loadquirks(st) 421 struct st_softc *st; 422 { 423 int i; 424 struct modes *mode; 425 struct modes *mode2; 426 427 mode = st->quirkdata->modes; 428 mode2 = st->modes; 429 for (i = 0; i < 4; i++) { 430 memset(mode2, 0, sizeof(struct modes)); 431 st->modeflags[i] &= ~(BLKSIZE_SET_BY_QUIRK | 432 DENSITY_SET_BY_QUIRK | BLKSIZE_SET_BY_USER | 433 DENSITY_SET_BY_USER); 434 if ((mode->quirks | st->drive_quirks) & ST_Q_FORCE_BLKSIZE) { 435 mode2->blksize = mode->blksize; 436 st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; 437 } 438 if (mode->density) { 439 mode2->density = mode->density; 440 st->modeflags[i] |= DENSITY_SET_BY_QUIRK; 441 } 442 mode2->quirks |= mode->quirks; 443 mode++; 444 mode2++; 445 } 446 } 447 448 /* 449 * open the device. 450 */ 451 int 452 stopen(dev, flags, mode, p) 453 dev_t dev; 454 int flags; 455 int mode; 456 struct proc *p; 457 { 458 u_int stmode, dsty; 459 int error, sflags, unit, tries, ntries; 460 struct st_softc *st; 461 struct scsipi_periph *periph; 462 struct scsipi_adapter *adapt; 463 464 unit = STUNIT(dev); 465 if (unit >= st_cd.cd_ndevs) 466 return (ENXIO); 467 st = st_cd.cd_devs[unit]; 468 if (st == NULL) 469 return (ENXIO); 470 471 stmode = STMODE(dev); 472 dsty = STDSTY(dev); 473 474 periph = st->sc_periph; 475 adapt = periph->periph_channel->chan_adapter; 476 477 SC_DEBUG(periph, SCSIPI_DB1, ("open: dev=0x%x (unit %d (of %d))\n", dev, 478 unit, st_cd.cd_ndevs)); 479 480 481 /* 482 * Only allow one at a time 483 */ 484 if (periph->periph_flags & PERIPH_OPEN) { 485 printf("%s: already open\n", st->sc_dev.dv_xname); 486 return (EBUSY); 487 } 488 489 if ((error = scsipi_adapter_addref(adapt)) != 0) 490 return (error); 491 492 /* 493 * clear any latched errors. 494 */ 495 st->mt_resid = 0; 496 st->mt_erreg = 0; 497 st->asc = 0; 498 st->ascq = 0; 499 500 /* 501 * Catch any unit attention errors. Be silent about this 502 * unless we're already mounted. We ignore media change 503 * if we're in control mode or not mounted yet. 504 */ 505 if ((st->flags & ST_MOUNTED) == 0 || stmode == CTRL_MODE) { 506 #ifdef SCSIDEBUG 507 sflags = XS_CTL_IGNORE_MEDIA_CHANGE; 508 #else 509 sflags = XS_CTL_SILENT|XS_CTL_IGNORE_MEDIA_CHANGE; 510 #endif 511 } else 512 sflags = 0; 513 514 /* 515 * If we're already mounted or we aren't configured for 516 * a mount delay, only try a test unit ready once. Otherwise, 517 * try up to ST_MOUNT_DELAY times with a rest interval of 518 * one second between each try. 519 */ 520 521 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0) { 522 ntries = 1; 523 } else { 524 ntries = ST_MOUNT_DELAY; 525 } 526 527 for (error = tries = 0; tries < ntries; tries++) { 528 int slpintr, oflags; 529 530 /* 531 * If we had no error, or we're opening the control mode 532 * device, we jump out right away. 533 */ 534 535 error = scsipi_test_unit_ready(periph, sflags); 536 if (error == 0 || stmode == CTRL_MODE) { 537 break; 538 } 539 540 /* 541 * We had an error. 542 * 543 * If we're already mounted or we aren't configured for 544 * a mount delay, or the error isn't a NOT READY error, 545 * skip to the error exit now. 546 */ 547 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0 || 548 (st->mt_key != SKEY_NOT_READY)) { 549 goto bad; 550 } 551 552 /* 553 * clear any latched errors. 554 */ 555 st->mt_resid = 0; 556 st->mt_erreg = 0; 557 st->asc = 0; 558 st->ascq = 0; 559 560 /* 561 * Fake that we have the device open so 562 * we block other apps from getting in. 563 */ 564 565 oflags = periph->periph_flags; 566 periph->periph_flags |= PERIPH_OPEN; 567 568 slpintr = tsleep(&lbolt, PUSER|PCATCH, "stload", 0); 569 570 periph->periph_flags = oflags; /* restore flags */ 571 if (slpintr) { 572 goto bad; 573 } 574 } 575 576 577 /* 578 * If the mode is 3 (e.g. minor = 3,7,11,15) then the device has 579 * been opened to set defaults and perform other, usually non-I/O 580 * related, operations. In this case, do a quick check to see 581 * whether the unit actually had a tape loaded (this will be known 582 * as to whether or not we got a NOT READY for the above 583 * unit attention). If a tape is there, go do a mount sequence. 584 */ 585 if (stmode == CTRL_MODE && st->mt_key == SKEY_NOT_READY) { 586 periph->periph_flags |= PERIPH_OPEN; 587 return (0); 588 } 589 590 /* 591 * If we get this far and had an error set, that means we failed 592 * to pass the 'test unit ready' test for the non-controlmode device, 593 * so we bounce the open. 594 */ 595 596 if (error) 597 return (error); 598 599 /* 600 * Else, we're now committed to saying we're open. 601 */ 602 603 periph->periph_flags |= PERIPH_OPEN; /* unit attn are now errors */ 604 605 /* 606 * If it's a different mode, or if the media has been 607 * invalidated, unmount the tape from the previous 608 * session but continue with open processing 609 */ 610 if (st->last_dsty != dsty || 611 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 612 st_unmount(st, NOEJECT); 613 614 /* 615 * If we are not mounted, then we should start a new 616 * mount session. 617 */ 618 if (!(st->flags & ST_MOUNTED)) { 619 if ((error = st_mount_tape(dev, flags)) != 0) 620 goto bad; 621 st->last_dsty = dsty; 622 } 623 624 SC_DEBUG(periph, SCSIPI_DB2, ("open complete\n")); 625 return (0); 626 627 bad: 628 st_unmount(st, NOEJECT); 629 scsipi_adapter_delref(adapt); 630 periph->periph_flags &= ~PERIPH_OPEN; 631 return (error); 632 } 633 634 /* 635 * close the device.. only called if we are the LAST 636 * occurence of an open device 637 */ 638 int 639 stclose(dev, flags, mode, p) 640 dev_t dev; 641 int flags; 642 int mode; 643 struct proc *p; 644 { 645 int stxx, error = 0; 646 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 647 struct scsipi_periph *periph = st->sc_periph; 648 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 649 650 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("closing\n")); 651 652 /* 653 * Make sure that a tape opened in write-only mode will have 654 * file marks written on it when closed, even if not written to. 655 * 656 * This is for SUN compatibility. Actually, the Sun way of 657 * things is to: 658 * 659 * only write filemarks if there are fmks to be written and 660 * - open for write (possibly read/write) 661 * - the last operation was a write 662 * or: 663 * - opened for wronly 664 * - no data was written (including filemarks) 665 */ 666 667 stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); 668 if (((flags & FWRITE) && stxx == ST_WRITTEN) || 669 ((flags & O_ACCMODE) == FWRITE && stxx == 0)) { 670 int nm; 671 error = st_check_eod(st, FALSE, &nm, 0); 672 } 673 674 switch (STMODE(dev)) { 675 case NORMAL_MODE: 676 st_unmount(st, NOEJECT); 677 break; 678 case NOREW_MODE: 679 case CTRL_MODE: 680 /* 681 * Leave mounted unless media seems to have been removed. 682 * 683 * Otherwise, if we're to terminate a tape with more than one 684 * filemark [ and because we're not rewinding here ], backspace 685 * one filemark so that later appends will see an unbroken 686 * sequence of: 687 * 688 * file - FMK - file - FMK ... file - FMK FMK (EOM) 689 */ 690 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 691 st_unmount(st, NOEJECT); 692 } else if (error == 0) { 693 /* 694 * ST_WRITTEN was preserved from above. 695 * 696 * All we need to know here is: 697 * 698 * Were we writing this tape and was the last 699 * operation a write? 700 * 701 * Are there supposed to be 2FM at EOD? 702 * 703 * If both statements are true, then we backspace 704 * one filemark. 705 */ 706 stxx |= (st->flags & ST_2FM_AT_EOD); 707 if ((flags & FWRITE) != 0 && 708 (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { 709 error = st_space(st, -1, SP_FILEMARKS, 0); 710 } 711 } 712 break; 713 case EJECT_MODE: 714 st_unmount(st, EJECT); 715 break; 716 } 717 718 scsipi_wait_drain(periph); 719 720 scsipi_adapter_delref(adapt); 721 periph->periph_flags &= ~PERIPH_OPEN; 722 723 return (error); 724 } 725 726 /* 727 * Start a new mount session. 728 * Copy in all the default parameters from the selected device mode. 729 * and try guess any that seem to be defaulted. 730 */ 731 int 732 st_mount_tape(dev, flags) 733 dev_t dev; 734 int flags; 735 { 736 int unit; 737 u_int dsty; 738 struct st_softc *st; 739 struct scsipi_periph *periph; 740 int error = 0; 741 742 unit = STUNIT(dev); 743 dsty = STDSTY(dev); 744 st = st_cd.cd_devs[unit]; 745 periph = st->sc_periph; 746 747 if (st->flags & ST_MOUNTED) 748 return (0); 749 750 SC_DEBUG(periph, SCSIPI_DB1, ("mounting\n ")); 751 st->flags |= ST_NEW_MOUNT; 752 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 753 /* 754 * If the media is new, then make sure we give it a chance to 755 * to do a 'load' instruction. (We assume it is new.) 756 */ 757 if ((error = st_load(st, LD_LOAD, XS_CTL_SILENT)) != 0) 758 return (error); 759 /* 760 * Throw another dummy instruction to catch 761 * 'Unit attention' errors. Many drives give 762 * these after doing a Load instruction (with 763 * the MEDIUM MAY HAVE CHANGED asc/ascq). 764 */ 765 scsipi_test_unit_ready(periph, XS_CTL_SILENT); /* XXX */ 766 767 /* 768 * Some devices can't tell you much until they have been 769 * asked to look at the media. This quirk does this. 770 */ 771 if (st->quirks & ST_Q_SENSE_HELP) 772 if ((error = st_touch_tape(st)) != 0) 773 return (error); 774 /* 775 * Load the physical device parameters 776 * loads: blkmin, blkmax 777 */ 778 if ((error = st->ops(st, ST_OPS_RBL, 0)) != 0) 779 return (error); 780 /* 781 * Load the media dependent parameters 782 * includes: media_blksize,media_density,numblks 783 * As we have a tape in, it should be reflected here. 784 * If not you may need the "quirk" above. 785 */ 786 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 787 return (error); 788 /* 789 * If we have gained a permanent density from somewhere, 790 * then use it in preference to the one supplied by 791 * default by the driver. 792 */ 793 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 794 st->density = st->modes[dsty].density; 795 else 796 st->density = st->media_density; 797 /* 798 * If we have gained a permanent blocksize 799 * then use it in preference to the one supplied by 800 * default by the driver. 801 */ 802 st->flags &= ~ST_FIXEDBLOCKS; 803 if (st->modeflags[dsty] & 804 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 805 st->blksize = st->modes[dsty].blksize; 806 if (st->blksize) 807 st->flags |= ST_FIXEDBLOCKS; 808 } else { 809 if ((error = st_decide_mode(st, FALSE)) != 0) 810 return (error); 811 } 812 if ((error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 813 /* ATAPI will return ENODEV for this, and this may be OK */ 814 if (error != ENODEV) { 815 printf("%s: cannot set selected mode\n", 816 st->sc_dev.dv_xname); 817 return (error); 818 } 819 } 820 if (!(st->quirks & ST_Q_NOPREVENT)) { 821 scsipi_prevent(periph, PR_PREVENT, 822 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 823 } 824 st->flags &= ~ST_NEW_MOUNT; 825 st->flags |= ST_MOUNTED; 826 periph->periph_flags |= PERIPH_MEDIA_LOADED; /* move earlier? */ 827 828 return (0); 829 } 830 831 /* 832 * End the present mount session. 833 * Rewind, and optionally eject the tape. 834 * Reset various flags to indicate that all new 835 * operations require another mount operation 836 */ 837 void 838 st_unmount(st, eject) 839 struct st_softc *st; 840 boolean eject; 841 { 842 struct scsipi_periph *periph = st->sc_periph; 843 int nmarks; 844 845 if ((st->flags & ST_MOUNTED) == 0) 846 return; 847 SC_DEBUG(periph, SCSIPI_DB1, ("unmounting\n")); 848 st_check_eod(st, FALSE, &nmarks, XS_CTL_IGNORE_NOT_READY); 849 st_rewind(st, 0, XS_CTL_IGNORE_NOT_READY); 850 851 /* 852 * Section 9.3.3 of the SCSI specs states that a device shall return 853 * the density value specified in the last succesfull MODE SELECT 854 * after an unload operation, in case it is not able to 855 * automatically determine the density of the new medium. 856 * 857 * So we instruct the device to use the default density, which will 858 * prevent the use of stale density values (in particular, 859 * in st_touch_tape(). 860 */ 861 st->density = 0; 862 if (st->ops(st, ST_OPS_MODESELECT, 0) != 0) { 863 printf("%s: WARNING: cannot revert to default density\n", 864 st->sc_dev.dv_xname); 865 } 866 867 scsipi_prevent(periph, PR_ALLOW, 868 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 869 if (eject) 870 st_load(st, LD_UNLOAD, XS_CTL_IGNORE_NOT_READY); 871 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 872 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 873 } 874 875 /* 876 * Given all we know about the device, media, mode, 'quirks' and 877 * initial operation, make a decision as to how we should be set 878 * to run (regarding blocking and EOD marks) 879 */ 880 int 881 st_decide_mode(st, first_read) 882 struct st_softc *st; 883 boolean first_read; 884 { 885 886 SC_DEBUG(st->sc_periph, SCSIPI_DB2, ("starting block mode decision\n")); 887 888 /* 889 * If the drive can only handle fixed-length blocks and only at 890 * one size, perhaps we should just do that. 891 */ 892 if (st->blkmin && (st->blkmin == st->blkmax)) { 893 st->flags |= ST_FIXEDBLOCKS; 894 st->blksize = st->blkmin; 895 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 896 ("blkmin == blkmax of %d\n", st->blkmin)); 897 goto done; 898 } 899 /* 900 * If the tape density mandates (or even suggests) use of fixed 901 * or variable-length blocks, comply. 902 */ 903 switch (st->density) { 904 case HALFINCH_800: 905 case HALFINCH_1600: 906 case HALFINCH_6250: 907 case DDS: 908 st->flags &= ~ST_FIXEDBLOCKS; 909 st->blksize = 0; 910 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 911 ("density specified variable\n")); 912 goto done; 913 case QIC_11: 914 case QIC_24: 915 case QIC_120: 916 case QIC_150: 917 case QIC_525: 918 case QIC_1320: 919 case QIC_3095: 920 case QIC_3220: 921 st->flags |= ST_FIXEDBLOCKS; 922 if (st->media_blksize > 0) 923 st->blksize = st->media_blksize; 924 else 925 st->blksize = DEF_FIXED_BSIZE; 926 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 927 ("density specified fixed\n")); 928 goto done; 929 } 930 /* 931 * If we're about to read the tape, perhaps we should choose 932 * fixed or variable-length blocks and block size according to 933 * what the drive found on the tape. 934 */ 935 if (first_read && 936 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 937 (st->media_blksize == DEF_FIXED_BSIZE) || 938 (st->media_blksize == 1024))) { 939 if (st->media_blksize > 0) 940 st->flags |= ST_FIXEDBLOCKS; 941 else 942 st->flags &= ~ST_FIXEDBLOCKS; 943 st->blksize = st->media_blksize; 944 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 945 ("Used media_blksize of %d\n", st->media_blksize)); 946 goto done; 947 } 948 /* 949 * We're getting no hints from any direction. Choose variable- 950 * length blocks arbitrarily. 951 */ 952 st->flags &= ~ST_FIXEDBLOCKS; 953 st->blksize = 0; 954 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 955 ("Give up and default to variable mode\n")); 956 957 done: 958 /* 959 * Decide whether or not to write two file marks to signify end- 960 * of-data. Make the decision as a function of density. If 961 * the decision is not to use a second file mark, the SCSI BLANK 962 * CHECK condition code will be recognized as end-of-data when 963 * first read. 964 * (I think this should be a by-product of fixed/variable..julian) 965 */ 966 switch (st->density) { 967 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 968 case QIC_11: 969 case QIC_24: 970 case QIC_120: 971 case QIC_150: 972 case QIC_525: 973 case QIC_1320: 974 case QIC_3095: 975 case QIC_3220: 976 st->flags &= ~ST_2FM_AT_EOD; 977 break; 978 default: 979 st->flags |= ST_2FM_AT_EOD; 980 } 981 return (0); 982 } 983 984 /* 985 * Actually translate the requested transfer into 986 * one the physical driver can understand 987 * The transfer is described by a buf and will include 988 * only one physical transfer. 989 */ 990 void 991 ststrategy(bp) 992 struct buf *bp; 993 { 994 struct st_softc *st = st_cd.cd_devs[STUNIT(bp->b_dev)]; 995 int s; 996 997 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 998 ("ststrategy %ld bytes @ blk %d\n", bp->b_bcount, bp->b_blkno)); 999 /* 1000 * If it's a null transfer, return immediatly 1001 */ 1002 if (bp->b_bcount == 0) 1003 goto done; 1004 1005 /* If offset is negative, error */ 1006 if (bp->b_blkno < 0) { 1007 bp->b_error = EINVAL; 1008 goto bad; 1009 } 1010 1011 /* 1012 * Odd sized request on fixed drives are verboten 1013 */ 1014 if (st->flags & ST_FIXEDBLOCKS) { 1015 if (bp->b_bcount % st->blksize) { 1016 printf("%s: bad request, must be multiple of %d\n", 1017 st->sc_dev.dv_xname, st->blksize); 1018 bp->b_error = EIO; 1019 goto bad; 1020 } 1021 } 1022 /* 1023 * as are out-of-range requests on variable drives. 1024 */ 1025 else if (bp->b_bcount < st->blkmin || 1026 (st->blkmax && bp->b_bcount > st->blkmax)) { 1027 printf("%s: bad request, must be between %d and %d\n", 1028 st->sc_dev.dv_xname, st->blkmin, st->blkmax); 1029 bp->b_error = EIO; 1030 goto bad; 1031 } 1032 s = splbio(); 1033 1034 /* 1035 * Place it in the queue of activities for this tape 1036 * at the end (a bit silly because we only have on user.. 1037 * (but it could fork())) 1038 */ 1039 BUFQ_INSERT_TAIL(&st->buf_queue, bp); 1040 1041 /* 1042 * Tell the device to get going on the transfer if it's 1043 * not doing anything, otherwise just wait for completion 1044 * (All a bit silly if we're only allowing 1 open but..) 1045 */ 1046 ststart(st->sc_periph); 1047 1048 splx(s); 1049 return; 1050 bad: 1051 bp->b_flags |= B_ERROR; 1052 done: 1053 /* 1054 * Correctly set the buf to indicate a completed xfer 1055 */ 1056 bp->b_resid = bp->b_bcount; 1057 biodone(bp); 1058 return; 1059 } 1060 1061 /* 1062 * ststart looks to see if there is a buf waiting for the device 1063 * and that the device is not already busy. If both are true, 1064 * It dequeues the buf and creates a scsi command to perform the 1065 * transfer required. The transfer request will call scsipi_done 1066 * on completion, which will in turn call this routine again 1067 * so that the next queued transfer is performed. 1068 * The bufs are queued by the strategy routine (ststrategy) 1069 * 1070 * This routine is also called after other non-queued requests 1071 * have been made of the scsi driver, to ensure that the queue 1072 * continues to be drained. 1073 * ststart() is called at splbio 1074 */ 1075 void 1076 ststart(periph) 1077 struct scsipi_periph *periph; 1078 { 1079 struct st_softc *st = (void *)periph->periph_dev; 1080 struct buf *bp; 1081 struct scsi_rw_tape cmd; 1082 int flags, error; 1083 1084 SC_DEBUG(periph, SCSIPI_DB2, ("ststart ")); 1085 /* 1086 * See if there is a buf to do and we are not already 1087 * doing one 1088 */ 1089 while (periph->periph_active < periph->periph_openings) { 1090 /* if a special awaits, let it proceed first */ 1091 if (periph->periph_flags & PERIPH_WAITING) { 1092 periph->periph_flags &= ~PERIPH_WAITING; 1093 wakeup((caddr_t)periph); 1094 return; 1095 } 1096 1097 if ((bp = BUFQ_FIRST(&st->buf_queue)) == NULL) 1098 return; 1099 BUFQ_REMOVE(&st->buf_queue, bp); 1100 1101 /* 1102 * If the device has been unmounted by the user 1103 * then throw away all requests until done. 1104 */ 1105 if ((st->flags & ST_MOUNTED) == 0 || 1106 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 1107 /* make sure that one implies the other.. */ 1108 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 1109 bp->b_flags |= B_ERROR; 1110 bp->b_error = EIO; 1111 bp->b_resid = bp->b_bcount; 1112 biodone(bp); 1113 continue; 1114 } 1115 /* 1116 * only FIXEDBLOCK devices have pending I/O or space operations. 1117 */ 1118 if (st->flags & ST_FIXEDBLOCKS) { 1119 /* 1120 * If we are at a filemark but have not reported it yet 1121 * then we should report it now 1122 */ 1123 if (st->flags & ST_AT_FILEMARK) { 1124 if ((bp->b_flags & B_READ) == B_WRITE) { 1125 /* 1126 * Handling of ST_AT_FILEMARK in 1127 * st_space will fill in the right file 1128 * mark count. 1129 * Back up over filemark 1130 */ 1131 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1132 bp->b_flags |= B_ERROR; 1133 bp->b_error = EIO; 1134 biodone(bp); 1135 continue; 1136 } 1137 } else { 1138 bp->b_resid = bp->b_bcount; 1139 bp->b_error = 0; 1140 bp->b_flags &= ~B_ERROR; 1141 st->flags &= ~ST_AT_FILEMARK; 1142 biodone(bp); 1143 continue; /* seek more work */ 1144 } 1145 } 1146 } 1147 /* 1148 * If we are at EOM but have not reported it 1149 * yet then we should report it now. 1150 */ 1151 if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { 1152 bp->b_resid = bp->b_bcount; 1153 if (st->flags & ST_EIO_PENDING) { 1154 bp->b_error = EIO; 1155 bp->b_flags |= B_ERROR; 1156 } 1157 st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); 1158 biodone(bp); 1159 continue; /* seek more work */ 1160 } 1161 1162 /* 1163 * Fill out the scsi command 1164 */ 1165 memset(&cmd, 0, sizeof(cmd)); 1166 flags = XS_CTL_NOSLEEP | XS_CTL_ASYNC; 1167 if ((bp->b_flags & B_READ) == B_WRITE) { 1168 cmd.opcode = WRITE; 1169 st->flags &= ~ST_FM_WRITTEN; 1170 flags |= XS_CTL_DATA_OUT; 1171 } else { 1172 cmd.opcode = READ; 1173 flags |= XS_CTL_DATA_IN; 1174 } 1175 1176 /* 1177 * Handle "fixed-block-mode" tape drives by using the 1178 * block count instead of the length. 1179 */ 1180 if (st->flags & ST_FIXEDBLOCKS) { 1181 cmd.byte2 |= SRW_FIXED; 1182 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1183 } else 1184 _lto3b(bp->b_bcount, cmd.len); 1185 1186 /* 1187 * go ask the adapter to do all this for us 1188 */ 1189 error = scsipi_command(periph, 1190 (struct scsipi_generic *)&cmd, sizeof(cmd), 1191 (u_char *)bp->b_data, bp->b_bcount, 1192 0, ST_IO_TIME, bp, flags); 1193 if (error) { 1194 printf("%s: not queued, error %d\n", 1195 st->sc_dev.dv_xname, error); 1196 } 1197 } /* go back and see if we can cram more work in.. */ 1198 } 1199 1200 void 1201 stdone(xs) 1202 struct scsipi_xfer *xs; 1203 { 1204 struct st_softc *st = (void *)xs->xs_periph->periph_dev; 1205 1206 if (xs->bp != NULL) { 1207 if ((xs->bp->b_flags & B_READ) == B_WRITE) { 1208 st->flags |= ST_WRITTEN; 1209 } else { 1210 st->flags &= ~ST_WRITTEN; 1211 } 1212 #if NRND > 0 1213 rnd_add_uint32(&st->rnd_source, xs->bp->b_blkno); 1214 #endif 1215 } 1216 } 1217 1218 int 1219 stread(dev, uio, iomode) 1220 dev_t dev; 1221 struct uio *uio; 1222 int iomode; 1223 { 1224 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1225 1226 return (physio(ststrategy, NULL, dev, B_READ, 1227 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1228 } 1229 1230 int 1231 stwrite(dev, uio, iomode) 1232 dev_t dev; 1233 struct uio *uio; 1234 int iomode; 1235 { 1236 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1237 1238 return (physio(ststrategy, NULL, dev, B_WRITE, 1239 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1240 } 1241 1242 /* 1243 * Perform special action on behalf of the user; 1244 * knows about the internals of this device 1245 */ 1246 int 1247 stioctl(dev, cmd, arg, flag, p) 1248 dev_t dev; 1249 u_long cmd; 1250 caddr_t arg; 1251 int flag; 1252 struct proc *p; 1253 { 1254 int error = 0; 1255 int unit; 1256 int number, nmarks, dsty; 1257 int flags; 1258 struct st_softc *st; 1259 int hold_blksize; 1260 u_int8_t hold_density; 1261 struct mtop *mt = (struct mtop *) arg; 1262 1263 /* 1264 * Find the device that the user is talking about 1265 */ 1266 flags = 0; /* give error messages, act on errors etc. */ 1267 unit = STUNIT(dev); 1268 dsty = STDSTY(dev); 1269 st = st_cd.cd_devs[unit]; 1270 hold_blksize = st->blksize; 1271 hold_density = st->density; 1272 1273 switch ((u_int) cmd) { 1274 1275 case MTIOCGET: { 1276 struct mtget *g = (struct mtget *) arg; 1277 /* 1278 * (to get the current state of READONLY) 1279 */ 1280 error = st->ops(st, ST_OPS_MODESENSE, XS_CTL_SILENT); 1281 if (error) { 1282 /* 1283 * Ignore the error if in control mode; 1284 * this is mandated by st(4). 1285 */ 1286 if (STMODE(dev) != CTRL_MODE) 1287 break; 1288 error = 0; 1289 } 1290 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("[ioctl: get status]\n")); 1291 memset(g, 0, sizeof(struct mtget)); 1292 g->mt_type = 0x7; /* Ultrix compat *//*? */ 1293 g->mt_blksiz = st->blksize; 1294 g->mt_density = st->density; 1295 g->mt_mblksiz[0] = st->modes[0].blksize; 1296 g->mt_mblksiz[1] = st->modes[1].blksize; 1297 g->mt_mblksiz[2] = st->modes[2].blksize; 1298 g->mt_mblksiz[3] = st->modes[3].blksize; 1299 g->mt_mdensity[0] = st->modes[0].density; 1300 g->mt_mdensity[1] = st->modes[1].density; 1301 g->mt_mdensity[2] = st->modes[2].density; 1302 g->mt_mdensity[3] = st->modes[3].density; 1303 if (st->flags & ST_READONLY) 1304 g->mt_dsreg |= MT_DS_RDONLY; 1305 if (st->flags & ST_MOUNTED) 1306 g->mt_dsreg |= MT_DS_MOUNTED; 1307 g->mt_resid = st->mt_resid; 1308 g->mt_erreg = st->mt_erreg; 1309 /* 1310 * clear latched errors. 1311 */ 1312 st->mt_resid = 0; 1313 st->mt_erreg = 0; 1314 st->asc = 0; 1315 st->ascq = 0; 1316 break; 1317 } 1318 case MTIOCTOP: { 1319 1320 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1321 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1322 mt->mt_count)); 1323 1324 /* compat: in U*x it is a short */ 1325 number = mt->mt_count; 1326 switch ((short) (mt->mt_op)) { 1327 case MTWEOF: /* write an end-of-file record */ 1328 error = st_write_filemarks(st, number, flags); 1329 break; 1330 case MTBSF: /* backward space file */ 1331 number = -number; 1332 case MTFSF: /* forward space file */ 1333 error = st_check_eod(st, FALSE, &nmarks, flags); 1334 if (!error) 1335 error = st_space(st, number - nmarks, 1336 SP_FILEMARKS, flags); 1337 break; 1338 case MTBSR: /* backward space record */ 1339 number = -number; 1340 case MTFSR: /* forward space record */ 1341 error = st_check_eod(st, TRUE, &nmarks, flags); 1342 if (!error) 1343 error = st_space(st, number, SP_BLKS, flags); 1344 break; 1345 case MTREW: /* rewind */ 1346 error = st_rewind(st, 0, flags); 1347 break; 1348 case MTOFFL: /* rewind and put the drive offline */ 1349 st_unmount(st, EJECT); 1350 break; 1351 case MTNOP: /* no operation, sets status only */ 1352 break; 1353 case MTRETEN: /* retension the tape */ 1354 error = st_load(st, LD_RETENSION, flags); 1355 if (!error) 1356 error = st_load(st, LD_LOAD, flags); 1357 break; 1358 case MTEOM: /* forward space to end of media */ 1359 error = st_check_eod(st, FALSE, &nmarks, flags); 1360 if (!error) 1361 error = st_space(st, 1, SP_EOM, flags); 1362 break; 1363 case MTCACHE: /* enable controller cache */ 1364 st->flags &= ~ST_DONTBUFFER; 1365 goto try_new_value; 1366 case MTNOCACHE: /* disable controller cache */ 1367 st->flags |= ST_DONTBUFFER; 1368 goto try_new_value; 1369 case MTERASE: /* erase volume */ 1370 error = st_erase(st, number, flags); 1371 break; 1372 case MTSETBSIZ: /* Set block size for device */ 1373 #ifdef NOTYET 1374 if (!(st->flags & ST_NEW_MOUNT)) { 1375 uprintf("re-mount tape before changing blocksize"); 1376 error = EINVAL; 1377 break; 1378 } 1379 #endif 1380 if (number == 0) 1381 st->flags &= ~ST_FIXEDBLOCKS; 1382 else { 1383 if ((st->blkmin || st->blkmax) && 1384 (number < st->blkmin || 1385 number > st->blkmax)) { 1386 error = EINVAL; 1387 break; 1388 } 1389 st->flags |= ST_FIXEDBLOCKS; 1390 } 1391 st->blksize = number; 1392 st->flags |= ST_BLOCK_SET; /*XXX */ 1393 goto try_new_value; 1394 1395 case MTSETDNSTY: /* Set density for device and mode */ 1396 /* 1397 * Any number >= 0 and <= 0xff is legal. Numbers 1398 * above 0x80 are 'vendor unique'. 1399 */ 1400 if (number < 0 || number > 255) { 1401 error = EINVAL; 1402 break; 1403 } else 1404 st->density = number; 1405 goto try_new_value; 1406 1407 case MTCMPRESS: 1408 error = st->ops(st, (number == 0) ? 1409 ST_OPS_CMPRSS_OFF : ST_OPS_CMPRSS_ON, 1410 XS_CTL_SILENT); 1411 break; 1412 1413 case MTEWARN: 1414 if (number) 1415 st->flags |= ST_EARLYWARN; 1416 else 1417 st->flags &= ~ST_EARLYWARN; 1418 break; 1419 1420 default: 1421 error = EINVAL; 1422 } 1423 break; 1424 } 1425 case MTIOCIEOT: 1426 case MTIOCEEOT: 1427 break; 1428 1429 case MTIOCRDSPOS: 1430 error = st_rdpos(st, 0, (u_int32_t *) arg); 1431 break; 1432 1433 case MTIOCRDHPOS: 1434 error = st_rdpos(st, 1, (u_int32_t *) arg); 1435 break; 1436 1437 case MTIOCSLOCATE: 1438 error = st_setpos(st, 0, (u_int32_t *) arg); 1439 break; 1440 1441 case MTIOCHLOCATE: 1442 error = st_setpos(st, 1, (u_int32_t *) arg); 1443 break; 1444 1445 1446 default: 1447 error = scsipi_do_ioctl(st->sc_periph, dev, cmd, arg, 1448 flag, p); 1449 break; 1450 } 1451 return (error); 1452 /*-----------------------------*/ 1453 try_new_value: 1454 /* 1455 * Check that the mode being asked for is aggreeable to the 1456 * drive. If not, put it back the way it was. 1457 * 1458 * If in control mode, we can make (persistent) mode changes 1459 * even if no medium is loaded (see st(4)). 1460 */ 1461 if ((STMODE(dev) != CTRL_MODE || (st->flags & ST_MOUNTED) != 0) && 1462 (error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 1463 /* put it back as it was */ 1464 printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); 1465 st->density = hold_density; 1466 st->blksize = hold_blksize; 1467 if (st->blksize) 1468 st->flags |= ST_FIXEDBLOCKS; 1469 else 1470 st->flags &= ~ST_FIXEDBLOCKS; 1471 return (error); 1472 } 1473 /* 1474 * As the drive liked it, if we are setting a new default, 1475 * set it into the structures as such. 1476 * 1477 * The means for deciding this are not finalised yet- but 1478 * if the device was opened in Control Mode, the values 1479 * are persistent now across mounts. 1480 */ 1481 if (STMODE(dev) == CTRL_MODE) { 1482 switch ((short) (mt->mt_op)) { 1483 case MTSETBSIZ: 1484 st->modes[dsty].blksize = st->blksize; 1485 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1486 break; 1487 case MTSETDNSTY: 1488 st->modes[dsty].density = st->density; 1489 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1490 break; 1491 } 1492 } 1493 return (0); 1494 } 1495 1496 /* 1497 * Do a synchronous read. 1498 */ 1499 int 1500 st_read(st, buf, size, flags) 1501 struct st_softc *st; 1502 int size; 1503 int flags; 1504 char *buf; 1505 { 1506 struct scsi_rw_tape cmd; 1507 1508 /* 1509 * If it's a null transfer, return immediatly 1510 */ 1511 if (size == 0) 1512 return (0); 1513 memset(&cmd, 0, sizeof(cmd)); 1514 cmd.opcode = READ; 1515 if (st->flags & ST_FIXEDBLOCKS) { 1516 cmd.byte2 |= SRW_FIXED; 1517 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1518 cmd.len); 1519 } else 1520 _lto3b(size, cmd.len); 1521 return (scsipi_command(st->sc_periph, 1522 (struct scsipi_generic *)&cmd, sizeof(cmd), 1523 (u_char *)buf, size, 0, ST_IO_TIME, NULL, flags | XS_CTL_DATA_IN)); 1524 } 1525 1526 /* 1527 * issue an erase command 1528 */ 1529 int 1530 st_erase(st, full, flags) 1531 struct st_softc *st; 1532 int full, flags; 1533 { 1534 int tmo; 1535 struct scsi_erase cmd; 1536 1537 /* 1538 * Full erase means set LONG bit in erase command, which asks 1539 * the drive to erase the entire unit. Without this bit, we're 1540 * asking the drive to write an erase gap. 1541 */ 1542 memset(&cmd, 0, sizeof(cmd)); 1543 cmd.opcode = ERASE; 1544 if (full) { 1545 cmd.byte2 = SE_LONG; 1546 tmo = ST_SPC_TIME; 1547 } else { 1548 tmo = ST_IO_TIME; 1549 } 1550 1551 /* 1552 * XXX We always do this asynchronously, for now, unless the device 1553 * has the ST_Q_ERASE_NOIMM quirk. How long should we wait if we 1554 * want to (eventually) to it synchronously? 1555 */ 1556 if ((st->quirks & ST_Q_ERASE_NOIMM) == 0) 1557 cmd.byte2 |= SE_IMMED; 1558 1559 return (scsipi_command(st->sc_periph, 1560 (struct scsipi_generic *)&cmd, sizeof(cmd), 1561 0, 0, ST_RETRIES, tmo, NULL, flags)); 1562 } 1563 1564 /* 1565 * skip N blocks/filemarks/seq filemarks/eom 1566 */ 1567 int 1568 st_space(st, number, what, flags) 1569 struct st_softc *st; 1570 u_int what; 1571 int flags; 1572 int number; 1573 { 1574 struct scsi_space cmd; 1575 int error; 1576 1577 switch (what) { 1578 case SP_BLKS: 1579 if (st->flags & ST_PER_ACTION) { 1580 if (number > 0) { 1581 st->flags &= ~ST_PER_ACTION; 1582 return (EIO); 1583 } else if (number < 0) { 1584 if (st->flags & ST_AT_FILEMARK) { 1585 /* 1586 * Handling of ST_AT_FILEMARK 1587 * in st_space will fill in the 1588 * right file mark count. 1589 */ 1590 error = st_space(st, 0, SP_FILEMARKS, 1591 flags); 1592 if (error) 1593 return (error); 1594 } 1595 if (st->flags & ST_BLANK_READ) { 1596 st->flags &= ~ST_BLANK_READ; 1597 return (EIO); 1598 } 1599 st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); 1600 } 1601 } 1602 break; 1603 case SP_FILEMARKS: 1604 if (st->flags & ST_EIO_PENDING) { 1605 if (number > 0) { 1606 /* pretend we just discovered the error */ 1607 st->flags &= ~ST_EIO_PENDING; 1608 return (EIO); 1609 } else if (number < 0) { 1610 /* back away from the error */ 1611 st->flags &= ~ST_EIO_PENDING; 1612 } 1613 } 1614 if (st->flags & ST_AT_FILEMARK) { 1615 st->flags &= ~ST_AT_FILEMARK; 1616 number--; 1617 } 1618 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 1619 /* back away from unwritten tape */ 1620 st->flags &= ~ST_BLANK_READ; 1621 number++; /* XXX dubious */ 1622 } 1623 break; 1624 case SP_EOM: 1625 if (st->flags & ST_EOM_PENDING) { 1626 /* we're already there */ 1627 st->flags &= ~ST_EOM_PENDING; 1628 return (0); 1629 } 1630 if (st->flags & ST_EIO_PENDING) { 1631 /* pretend we just discovered the error */ 1632 st->flags &= ~ST_EIO_PENDING; 1633 return (EIO); 1634 } 1635 if (st->flags & ST_AT_FILEMARK) 1636 st->flags &= ~ST_AT_FILEMARK; 1637 break; 1638 } 1639 if (number == 0) 1640 return (0); 1641 1642 memset(&cmd, 0, sizeof(cmd)); 1643 cmd.opcode = SPACE; 1644 cmd.byte2 = what; 1645 _lto3b(number, cmd.number); 1646 1647 return (scsipi_command(st->sc_periph, 1648 (struct scsipi_generic *)&cmd, sizeof(cmd), 1649 0, 0, 0, ST_SPC_TIME, NULL, flags)); 1650 } 1651 1652 /* 1653 * write N filemarks 1654 */ 1655 int 1656 st_write_filemarks(st, number, flags) 1657 struct st_softc *st; 1658 int flags; 1659 int number; 1660 { 1661 struct scsi_write_filemarks cmd; 1662 1663 /* 1664 * It's hard to write a negative number of file marks. 1665 * Don't try. 1666 */ 1667 if (number < 0) 1668 return (EINVAL); 1669 switch (number) { 1670 case 0: /* really a command to sync the drive's buffers */ 1671 break; 1672 case 1: 1673 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 1674 st->flags &= ~ST_WRITTEN; 1675 else 1676 st->flags |= ST_FM_WRITTEN; 1677 st->flags &= ~ST_PER_ACTION; 1678 break; 1679 default: 1680 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 1681 } 1682 1683 memset(&cmd, 0, sizeof(cmd)); 1684 cmd.opcode = WRITE_FILEMARKS; 1685 _lto3b(number, cmd.number); 1686 1687 return (scsipi_command(st->sc_periph, 1688 (struct scsipi_generic *)&cmd, sizeof(cmd), 1689 0, 0, 0, ST_IO_TIME * 4, NULL, flags)); 1690 } 1691 1692 /* 1693 * Make sure the right number of file marks is on tape if the 1694 * tape has been written. If the position argument is true, 1695 * leave the tape positioned where it was originally. 1696 * 1697 * nmarks returns the number of marks to skip (or, if position 1698 * true, which were skipped) to get back original position. 1699 */ 1700 int 1701 st_check_eod(st, position, nmarks, flags) 1702 struct st_softc *st; 1703 boolean position; 1704 int *nmarks; 1705 int flags; 1706 { 1707 int error; 1708 1709 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 1710 default: 1711 *nmarks = 0; 1712 return (0); 1713 case ST_WRITTEN: 1714 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 1715 *nmarks = 1; 1716 break; 1717 case ST_WRITTEN | ST_2FM_AT_EOD: 1718 *nmarks = 2; 1719 } 1720 error = st_write_filemarks(st, *nmarks, flags); 1721 if (position && !error) 1722 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 1723 return (error); 1724 } 1725 1726 /* 1727 * load/unload/retension 1728 */ 1729 int 1730 st_load(st, type, flags) 1731 struct st_softc *st; 1732 u_int type; 1733 int flags; 1734 { 1735 int error; 1736 struct scsi_load cmd; 1737 1738 if (type != LD_LOAD) { 1739 int nmarks; 1740 1741 error = st_check_eod(st, FALSE, &nmarks, flags); 1742 if (error) { 1743 printf("%s: failed to write closing filemarks at " 1744 "unload, errno=%d\n", st->sc_dev.dv_xname, error); 1745 return (error); 1746 } 1747 } 1748 if (st->quirks & ST_Q_IGNORE_LOADS) { 1749 if (type == LD_LOAD) { 1750 /* 1751 * If we ignore loads, at least we should try a rewind. 1752 */ 1753 return st_rewind(st, 0, flags); 1754 } 1755 /* otherwise, we should do what's asked of us */ 1756 } 1757 1758 memset(&cmd, 0, sizeof(cmd)); 1759 cmd.opcode = LOAD; 1760 cmd.how = type; 1761 1762 error = scsipi_command(st->sc_periph, 1763 (struct scsipi_generic *)&cmd, sizeof(cmd), 1764 0, 0, ST_RETRIES, ST_SPC_TIME, NULL, flags); 1765 if (error) { 1766 printf("%s: error %d in st_load (op %d)\n", 1767 st->sc_dev.dv_xname, error, type); 1768 } 1769 return (error); 1770 } 1771 1772 /* 1773 * Rewind the device 1774 */ 1775 int 1776 st_rewind(st, immediate, flags) 1777 struct st_softc *st; 1778 u_int immediate; 1779 int flags; 1780 { 1781 struct scsi_rewind cmd; 1782 int error; 1783 int nmarks; 1784 1785 error = st_check_eod(st, FALSE, &nmarks, flags); 1786 if (error) { 1787 printf("%s: failed to write closing filemarks at " 1788 "rewind, errno=%d\n", st->sc_dev.dv_xname, error); 1789 return (error); 1790 } 1791 st->flags &= ~ST_PER_ACTION; 1792 1793 /* 1794 * ATAPI tapes always need foo to be set 1795 */ 1796 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1797 immediate = SR_IMMED; 1798 1799 memset(&cmd, 0, sizeof(cmd)); 1800 cmd.opcode = REWIND; 1801 cmd.byte2 = immediate; 1802 1803 error = scsipi_command(st->sc_periph, 1804 (struct scsipi_generic *)&cmd, sizeof(cmd), 0, 0, ST_RETRIES, 1805 immediate ? ST_CTL_TIME: ST_SPC_TIME, NULL, flags); 1806 if (error) { 1807 printf("%s: error %d trying to rewind\n", 1808 st->sc_dev.dv_xname, error); 1809 } 1810 return (error); 1811 } 1812 1813 int 1814 st_rdpos(st, hard, blkptr) 1815 struct st_softc *st; 1816 int hard; 1817 u_int32_t *blkptr; 1818 { 1819 int error; 1820 u_int8_t posdata[20]; 1821 struct scsi_tape_read_position cmd; 1822 1823 /* 1824 * First flush any pending writes... 1825 */ 1826 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 1827 1828 /* 1829 * The latter case is for 'write protected' tapes 1830 * which are too stupid to recognize a zero count 1831 * for writing filemarks as a no-op. 1832 */ 1833 if (error != 0 && error != EACCES && error != EROFS) 1834 return (error); 1835 1836 memset(&cmd, 0, sizeof(cmd)); 1837 memset(&posdata, 0, sizeof(posdata)); 1838 cmd.opcode = READ_POSITION; 1839 if (hard) 1840 cmd.byte1 = 1; 1841 1842 error = scsipi_command(st->sc_periph, 1843 (struct scsipi_generic *)&cmd, sizeof(cmd), (u_char *)&posdata, 1844 sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, 1845 XS_CTL_SILENT | XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); 1846 1847 if (error == 0) { 1848 #if 0 1849 printf("posdata:"); 1850 for (hard = 0; hard < sizeof(posdata); hard++) 1851 printf("%02x ", posdata[hard] & 0xff); 1852 printf("\n"); 1853 #endif 1854 if (posdata[0] & 0x4) /* Block Position Unknown */ 1855 error = EINVAL; 1856 else 1857 *blkptr = _4btol(&posdata[4]); 1858 } 1859 return (error); 1860 } 1861 1862 int 1863 st_setpos(st, hard, blkptr) 1864 struct st_softc *st; 1865 int hard; 1866 u_int32_t *blkptr; 1867 { 1868 int error; 1869 struct scsi_tape_locate cmd; 1870 1871 /* 1872 * First flush any pending writes. Strictly speaking, 1873 * we're not supposed to have to worry about this, 1874 * but let's be untrusting. 1875 */ 1876 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 1877 1878 /* 1879 * The latter case is for 'write protected' tapes 1880 * which are too stupid to recognize a zero count 1881 * for writing filemarks as a no-op. 1882 */ 1883 if (error != 0 && error != EACCES && error != EROFS) 1884 return (error); 1885 1886 memset(&cmd, 0, sizeof(cmd)); 1887 cmd.opcode = LOCATE; 1888 if (hard) 1889 cmd.byte2 = 1 << 2; 1890 _lto4b(*blkptr, cmd.blkaddr); 1891 error = scsipi_command(st->sc_periph, 1892 (struct scsipi_generic *)&cmd, sizeof(cmd), 1893 NULL, 0, ST_RETRIES, ST_SPC_TIME, NULL, 0); 1894 /* 1895 * XXX: Note file && block number position now unknown (if 1896 * XXX: these things ever start being maintained in this driver) 1897 */ 1898 return (error); 1899 } 1900 1901 1902 /* 1903 * Look at the returned sense and act on the error and determine 1904 * the unix error number to pass back..., 0 (== report no error), 1905 * -1 = retry the operation, -2 continue error processing. 1906 */ 1907 int 1908 st_interpret_sense(xs) 1909 struct scsipi_xfer *xs; 1910 { 1911 struct scsipi_periph *periph = xs->xs_periph; 1912 struct scsipi_sense_data *sense = &xs->sense.scsi_sense; 1913 struct buf *bp = xs->bp; 1914 struct st_softc *st = (void *)periph->periph_dev; 1915 int retval = EJUSTRETURN; 1916 int doprint = ((xs->xs_control & XS_CTL_SILENT) == 0); 1917 u_int8_t key; 1918 int32_t info; 1919 1920 /* 1921 * If it isn't a extended or extended/deferred error, let 1922 * the generic code handle it. 1923 */ 1924 if ((sense->error_code & SSD_ERRCODE) != 0x70 && 1925 (sense->error_code & SSD_ERRCODE) != 0x71) { /* DEFFERRED */ 1926 return (retval); 1927 } 1928 1929 if (sense->error_code & SSD_ERRCODE_VALID) 1930 info = _4btol(sense->info); 1931 else 1932 info = xs->datalen; /* bad choice if fixed blocks */ 1933 key = sense->flags & SSD_KEY; 1934 st->mt_erreg = key; 1935 st->asc = sense->add_sense_code; 1936 st->ascq = sense->add_sense_code_qual; 1937 st->mt_resid = (short) info; 1938 1939 /* 1940 * If the device is not open yet, let generic handle 1941 */ 1942 if ((periph->periph_flags & PERIPH_OPEN) == 0) { 1943 return (retval); 1944 } 1945 1946 1947 if (st->flags & ST_FIXEDBLOCKS) { 1948 xs->resid = info * st->blksize; 1949 if (sense->flags & SSD_EOM) { 1950 if ((st->flags & ST_EARLYWARN) == 0) 1951 st->flags |= ST_EIO_PENDING; 1952 st->flags |= ST_EOM_PENDING; 1953 if (bp) 1954 bp->b_resid = xs->resid; 1955 } 1956 if (sense->flags & SSD_FILEMARK) { 1957 st->flags |= ST_AT_FILEMARK; 1958 if (bp) 1959 bp->b_resid = xs->resid; 1960 } 1961 if (sense->flags & SSD_ILI) { 1962 st->flags |= ST_EIO_PENDING; 1963 if (bp) 1964 bp->b_resid = xs->resid; 1965 if (sense->error_code & SSD_ERRCODE_VALID && 1966 (xs->xs_control & XS_CTL_SILENT) == 0) 1967 printf("%s: block wrong size, %d blocks " 1968 "residual\n", st->sc_dev.dv_xname, info); 1969 1970 /* 1971 * This quirk code helps the drive read 1972 * the first tape block, regardless of 1973 * format. That is required for these 1974 * drives to return proper MODE SENSE 1975 * information. 1976 */ 1977 if ((st->quirks & ST_Q_SENSE_HELP) && 1978 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 1979 st->blksize -= 512; 1980 } 1981 /* 1982 * If data wanted and no data was transferred, do it immediately 1983 */ 1984 if (xs->datalen && xs->resid >= xs->datalen) { 1985 if (st->flags & ST_EIO_PENDING) 1986 return (EIO); 1987 if (st->flags & ST_AT_FILEMARK) { 1988 if (bp) 1989 bp->b_resid = xs->resid; 1990 return (0); 1991 } 1992 } 1993 } else { /* must be variable mode */ 1994 if (sense->flags & SSD_EOM) { 1995 /* 1996 * The current semantics of this 1997 * driver requires EOM detection 1998 * to return EIO unless early 1999 * warning detection is enabled 2000 * for variable mode (this is always 2001 * on for fixed block mode). 2002 */ 2003 if (st->flags & ST_EARLYWARN) { 2004 st->flags |= ST_EOM_PENDING; 2005 retval = 0; 2006 } else { 2007 retval = EIO; 2008 } 2009 2010 /* 2011 * If it's an unadorned EOM detection, 2012 * suppress printing an error. 2013 */ 2014 if (key == SKEY_NO_SENSE) { 2015 doprint = 0; 2016 } 2017 } else if (sense->flags & SSD_FILEMARK) { 2018 retval = 0; 2019 } else if (sense->flags & SSD_ILI) { 2020 if (info < 0) { 2021 /* 2022 * The tape record was bigger than the read 2023 * we issued. 2024 */ 2025 if ((xs->xs_control & XS_CTL_SILENT) == 0) { 2026 printf("%s: %d-byte tape record too big" 2027 " for %d-byte user buffer\n", 2028 st->sc_dev.dv_xname, 2029 xs->datalen - info, xs->datalen); 2030 } 2031 retval = EIO; 2032 } else { 2033 retval = 0; 2034 } 2035 } 2036 xs->resid = info; 2037 if (bp) 2038 bp->b_resid = info; 2039 } 2040 2041 #ifndef SCSIPI_DEBUG 2042 if (retval == 0 && key == SKEY_NO_SENSE) 2043 doprint = 0; 2044 #endif 2045 if (key == SKEY_BLANK_CHECK) { 2046 /* 2047 * This quirk code helps the drive read the 2048 * first tape block, regardless of format. That 2049 * is required for these drives to return proper 2050 * MODE SENSE information. 2051 */ 2052 if ((st->quirks & ST_Q_SENSE_HELP) && 2053 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 2054 /* still starting */ 2055 st->blksize -= 512; 2056 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 2057 st->flags |= ST_BLANK_READ; 2058 xs->resid = xs->datalen; 2059 if (bp) { 2060 bp->b_resid = xs->resid; 2061 /* return an EOF */ 2062 } 2063 retval = 0; 2064 } 2065 } 2066 2067 /* 2068 * If generic sense processing will continue, we should not 2069 * print sense info here. 2070 */ 2071 if (retval == EJUSTRETURN) 2072 doprint = 0; 2073 2074 if (doprint) { 2075 #ifdef SCSIVERBOSE 2076 scsipi_print_sense(xs, 0); 2077 #else 2078 scsipi_printaddr(periph); 2079 printf("Sense Key 0x%02x", key); 2080 if ((sense->error_code & SSD_ERRCODE_VALID) != 0) { 2081 switch (key) { 2082 case SKEY_NOT_READY: 2083 case SKEY_ILLEGAL_REQUEST: 2084 case SKEY_UNIT_ATTENTION: 2085 case SKEY_WRITE_PROTECT: 2086 break; 2087 case SKEY_BLANK_CHECK: 2088 printf(", requested size: %d (decimal)", info); 2089 break; 2090 case SKEY_ABORTED_COMMAND: 2091 if (xs->xs_retries) 2092 printf(", retrying"); 2093 printf(", cmd 0x%x, info 0x%x", 2094 xs->cmd->opcode, info); 2095 break; 2096 default: 2097 printf(", info = %d (decimal)", info); 2098 } 2099 } 2100 if (sense->extra_len != 0) { 2101 int n; 2102 printf(", data ="); 2103 for (n = 0; n < sense->extra_len; n++) 2104 printf(" %02x", sense->cmd_spec_info[n]); 2105 } 2106 printf("\n"); 2107 #endif 2108 } 2109 return (retval); 2110 } 2111 2112 /* 2113 * The quirk here is that the drive returns some value to st_mode_sense 2114 * incorrectly until the tape has actually passed by the head. 2115 * 2116 * The method is to set the drive to large fixed-block state (user-specified 2117 * density and 1024-byte blocks), then read and rewind to get it to sense the 2118 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 2119 * work, as a last resort, try variable- length blocks. The result will be 2120 * the ability to do an accurate st_mode_sense. 2121 * 2122 * We know we can do a rewind because we just did a load, which implies rewind. 2123 * Rewind seems preferable to space backward if we have a virgin tape. 2124 * 2125 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 2126 * error processing, both part of st_interpret_sense. 2127 */ 2128 int 2129 st_touch_tape(st) 2130 struct st_softc *st; 2131 { 2132 char *buf; 2133 int readsize; 2134 int error; 2135 2136 buf = malloc(1024, M_TEMP, M_NOWAIT); 2137 if (buf == NULL) 2138 return (ENOMEM); 2139 2140 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 2141 goto bad; 2142 2143 /* 2144 * If the block size is already known from the 2145 * sense data, use it. Else start probing at 1024. 2146 */ 2147 if (st->media_blksize > 0) 2148 st->blksize = st->media_blksize; 2149 else 2150 st->blksize = 1024; 2151 2152 do { 2153 switch (st->blksize) { 2154 case 512: 2155 case 1024: 2156 readsize = st->blksize; 2157 st->flags |= ST_FIXEDBLOCKS; 2158 break; 2159 default: 2160 readsize = 1; 2161 st->flags &= ~ST_FIXEDBLOCKS; 2162 } 2163 if ((error = st->ops(st, ST_OPS_MODESELECT, XS_CTL_SILENT)) 2164 != 0) { 2165 /* 2166 * The device did not agree with the proposed 2167 * block size. If we exhausted our options, 2168 * return failure, else try another. 2169 */ 2170 if (readsize == 1) 2171 goto bad; 2172 st->blksize -= 512; 2173 continue; 2174 } 2175 st_read(st, buf, readsize, XS_CTL_SILENT); /* XXX */ 2176 if ((error = st_rewind(st, 0, 0)) != 0) { 2177 bad: free(buf, M_TEMP); 2178 return (error); 2179 } 2180 } while (readsize != 1 && readsize > st->blksize); 2181 2182 free(buf, M_TEMP); 2183 return (0); 2184 } 2185 2186 int 2187 stdump(dev, blkno, va, size) 2188 dev_t dev; 2189 daddr_t blkno; 2190 caddr_t va; 2191 size_t size; 2192 { 2193 2194 /* Not implemented. */ 2195 return (ENXIO); 2196 } 2197