1 /* $NetBSD: st.c,v 1.140 2001/05/30 20:28:17 bouyer 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 #define ST_RETRIES 4 /* only on non IO commands */ 83 84 #define STMODE(z) ( minor(z) & 0x03) 85 #define STDSTY(z) ((minor(z) >> 2) & 0x03) 86 #define STUNIT(z) ((minor(z) >> 4) ) 87 88 #define NORMAL_MODE 0 89 #define NOREW_MODE 1 90 #define EJECT_MODE 2 91 #define CTRL_MODE 3 92 93 #define FALSE 0 94 #define TRUE 1 95 96 #define ST_IO_TIME (3 * 60 * 1000) /* 3 minutes */ 97 #define ST_CTL_TIME (30 * 1000) /* 30 seconds */ 98 #define ST_SPC_TIME (4 * 60 * 60 * 1000) /* 4 hours */ 99 100 #ifndef ST_MOUNT_DELAY 101 #define ST_MOUNT_DELAY 0 102 #endif 103 104 /* 105 * Define various devices that we know mis-behave in some way, 106 * and note how they are bad, so we can correct for them 107 */ 108 109 const struct st_quirk_inquiry_pattern st_quirk_patterns[] = { 110 {{T_SEQUENTIAL, T_REMOV, 111 " ", " ", " "}, {0, 0, { 112 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 113 {ST_Q_FORCE_BLKSIZE, 512, QIC_24}, /* minor 4-7 */ 114 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_1600}, /* minor 8-11 */ 115 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_6250} /* minor 12-15 */ 116 }}}, 117 {{T_SEQUENTIAL, T_REMOV, 118 "TANDBERG", " TDC 3600 ", ""}, {0, 12, { 119 {0, 0, 0}, /* minor 0-3 */ 120 {ST_Q_FORCE_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 121 {0, 0, QIC_150}, /* minor 8-11 */ 122 {0, 0, QIC_120} /* minor 12-15 */ 123 }}}, 124 {{T_SEQUENTIAL, T_REMOV, 125 "TANDBERG", " TDC 3800 ", ""}, {0, 0, { 126 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 127 {0, 0, QIC_525}, /* minor 4-7 */ 128 {0, 0, QIC_150}, /* minor 8-11 */ 129 {0, 0, QIC_120} /* minor 12-15 */ 130 }}}, 131 /* 132 * lacking a manual for the 4200, it's not clear what the 133 * specific density codes should be- the device is a 2.5GB 134 * capable QIC drive, those density codes aren't readily 135 * availabel. The 'default' will just have to do. 136 */ 137 {{T_SEQUENTIAL, T_REMOV, 138 "TANDBERG", " TDC 4200 ", ""}, {0, 0, { 139 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 140 {0, 0, QIC_525}, /* minor 4-7 */ 141 {0, 0, QIC_150}, /* minor 8-11 */ 142 {0, 0, QIC_120} /* minor 12-15 */ 143 }}}, 144 /* 145 * At least -005 and -007 need this. I'll assume they all do unless I 146 * hear otherwise. - mycroft, 31MAR1994 147 */ 148 {{T_SEQUENTIAL, T_REMOV, 149 "ARCHIVE ", "VIPER 2525 25462", ""}, {0, 0, { 150 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 151 {ST_Q_SENSE_HELP, 0, QIC_525}, /* minor 4-7 */ 152 {0, 0, QIC_150}, /* minor 8-11 */ 153 {0, 0, QIC_120} /* minor 12-15 */ 154 }}}, 155 /* 156 * One user reports that this works for his tape drive. It probably 157 * needs more work. - mycroft, 09APR1994 158 */ 159 {{T_SEQUENTIAL, T_REMOV, 160 "SANKYO ", "CP525 ", ""}, {0, 0, { 161 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 162 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 163 {0, 0, QIC_150}, /* minor 8-11 */ 164 {0, 0, QIC_120} /* minor 12-15 */ 165 }}}, 166 {{T_SEQUENTIAL, T_REMOV, 167 "ANRITSU ", "DMT780 ", ""}, {0, 0, { 168 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 169 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 170 {0, 0, QIC_150}, /* minor 8-11 */ 171 {0, 0, QIC_120} /* minor 12-15 */ 172 }}}, 173 {{T_SEQUENTIAL, T_REMOV, 174 "ARCHIVE ", "VIPER 150 21247", ""}, {ST_Q_ERASE_NOIMM, 12, { 175 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 176 {0, 0, QIC_150}, /* minor 4-7 */ 177 {0, 0, QIC_120}, /* minor 8-11 */ 178 {0, 0, QIC_24} /* minor 12-15 */ 179 }}}, 180 {{T_SEQUENTIAL, T_REMOV, 181 "ARCHIVE ", "VIPER 150 21531", ""}, {ST_Q_ERASE_NOIMM, 12, { 182 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 183 {0, 0, QIC_150}, /* minor 4-7 */ 184 {0, 0, QIC_120}, /* minor 8-11 */ 185 {0, 0, QIC_24} /* minor 12-15 */ 186 }}}, 187 {{T_SEQUENTIAL, T_REMOV, 188 "WANGTEK ", "5099ES SCSI", ""}, {0, 0, { 189 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 190 {0, 0, QIC_11}, /* minor 4-7 */ 191 {0, 0, QIC_24}, /* minor 8-11 */ 192 {0, 0, QIC_24} /* minor 12-15 */ 193 }}}, 194 {{T_SEQUENTIAL, T_REMOV, 195 "WANGTEK ", "5150ES SCSI", ""}, {0, 0, { 196 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 197 {0, 0, QIC_24}, /* minor 4-7 */ 198 {0, 0, QIC_120}, /* minor 8-11 */ 199 {0, 0, QIC_150} /* minor 12-15 */ 200 }}}, 201 {{T_SEQUENTIAL, T_REMOV, 202 "WANGTEK ", "5525ES SCSI REV7", ""}, {0, 0, { 203 {0, 0, 0}, /* minor 0-3 */ 204 {ST_Q_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 205 {0, 0, QIC_150}, /* minor 8-11 */ 206 {0, 0, QIC_120} /* minor 12-15 */ 207 }}}, 208 {{T_SEQUENTIAL, T_REMOV, 209 "WangDAT ", "Model 1300 ", ""}, {0, 0, { 210 {0, 0, 0}, /* minor 0-3 */ 211 {ST_Q_FORCE_BLKSIZE, 512, DDS}, /* minor 4-7 */ 212 {ST_Q_FORCE_BLKSIZE, 1024, DDS}, /* minor 8-11 */ 213 {ST_Q_FORCE_BLKSIZE, 0, DDS} /* minor 12-15 */ 214 }}}, 215 {{T_SEQUENTIAL, T_REMOV, 216 "EXABYTE ", "EXB-8200 ", "263H"}, {0, 5, { 217 {0, 0, 0}, /* minor 0-3 */ 218 {0, 0, 0}, /* minor 4-7 */ 219 {0, 0, 0}, /* minor 8-11 */ 220 {0, 0, 0} /* minor 12-15 */ 221 }}}, 222 {{T_SEQUENTIAL, T_REMOV, 223 "STK", "9490", ""}, 224 {ST_Q_FORCE_BLKSIZE, 0, { 225 {0, 0, 0}, /* minor 0-3 */ 226 {0, 0, 0}, /* minor 4-7 */ 227 {0, 0, 0}, /* minor 8-11 */ 228 {0, 0, 0} /* minor 12-15 */ 229 }}}, 230 {{T_SEQUENTIAL, T_REMOV, 231 "STK", "SD-3", ""}, 232 {ST_Q_FORCE_BLKSIZE, 0, { 233 {0, 0, 0}, /* minor 0-3 */ 234 {0, 0, 0}, /* minor 4-7 */ 235 {0, 0, 0}, /* minor 8-11 */ 236 {0, 0, 0} /* minor 12-15 */ 237 }}}, 238 {{T_SEQUENTIAL, T_REMOV, 239 "IBM", "03590", ""}, {ST_Q_IGNORE_LOADS, 0, { 240 {0, 0, 0}, /* minor 0-3 */ 241 {0, 0, 0}, /* minor 4-7 */ 242 {0, 0, 0}, /* minor 8-11 */ 243 {0, 0, 0} /* minor 12-15 */ 244 }}}, 245 {{T_SEQUENTIAL, T_REMOV, 246 "HP ", "T4000s ", ""}, {ST_Q_UNIMODAL, 0, { 247 {0, 0, QIC_3095}, /* minor 0-3 */ 248 {0, 0, QIC_3095}, /* minor 4-7 */ 249 {0, 0, QIC_3095}, /* minor 8-11 */ 250 {0, 0, QIC_3095}, /* minor 12-15 */ 251 }}}, 252 #if 0 253 {{T_SEQUENTIAL, T_REMOV, 254 "EXABYTE ", "EXB-8200 ", ""}, {0, 12, { 255 {0, 0, 0}, /* minor 0-3 */ 256 {0, 0, 0}, /* minor 4-7 */ 257 {0, 0, 0}, /* minor 8-11 */ 258 {0, 0, 0} /* minor 12-15 */ 259 }}}, 260 #endif 261 {{T_SEQUENTIAL, T_REMOV, 262 "TEAC ", "MT-2ST/N50 ", ""}, {ST_Q_IGNORE_LOADS, 0, { 263 {0, 0, 0}, /* minor 0-3 */ 264 {0, 0, 0}, /* minor 4-7 */ 265 {0, 0, 0}, /* minor 8-11 */ 266 {0, 0, 0} /* minor 12-15 */ 267 }}}, 268 {{T_SEQUENTIAL, T_REMOV, 269 "OnStream", "ADR50 Drive", ""}, {ST_Q_UNIMODAL, 0, { 270 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 271 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 4-7 */ 272 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 8-11 */ 273 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 12-15 */ 274 }}}, 275 {{T_SEQUENTIAL, T_REMOV, 276 "NCR H621", "0-STD-03-46F880 ", ""}, {ST_Q_NOPREVENT, 0, { 277 {0, 0, 0}, /* minor 0-3 */ 278 {0, 0, 0}, /* minor 4-7 */ 279 {0, 0, 0}, /* minor 8-11 */ 280 {0, 0, 0} /* minor 12-15 */ 281 }}}, 282 }; 283 284 #define NOEJECT 0 285 #define EJECT 1 286 287 void st_identify_drive __P((struct st_softc *, 288 struct scsipi_inquiry_pattern *)); 289 void st_loadquirks __P((struct st_softc *)); 290 int st_mount_tape __P((dev_t, int)); 291 void st_unmount __P((struct st_softc *, boolean)); 292 int st_decide_mode __P((struct st_softc *, boolean)); 293 void ststart __P((struct scsipi_periph *)); 294 void stdone __P((struct scsipi_xfer *)); 295 int st_read __P((struct st_softc *, char *, int, int)); 296 int st_read_block_limits __P((struct st_softc *, int)); 297 int st_mode_sense __P((struct st_softc *, int)); 298 int st_mode_select __P((struct st_softc *, int)); 299 int st_cmprss __P((struct st_softc *, int)); 300 int st_space __P((struct st_softc *, int, u_int, int)); 301 int st_write_filemarks __P((struct st_softc *, int, int)); 302 int st_check_eod __P((struct st_softc *, boolean, int *, int)); 303 int st_load __P((struct st_softc *, u_int, int)); 304 int st_rewind __P((struct st_softc *, u_int, int)); 305 int st_interpret_sense __P((struct scsipi_xfer *)); 306 int st_touch_tape __P((struct st_softc *)); 307 int st_erase __P((struct st_softc *, int full, int flags)); 308 int st_rdpos __P((struct st_softc *, int, u_int32_t *)); 309 int st_setpos __P((struct st_softc *, int, u_int32_t *)); 310 311 const struct scsipi_periphsw st_switch = { 312 st_interpret_sense, 313 ststart, 314 NULL, 315 stdone 316 }; 317 318 #define ST_INFO_VALID 0x0001 319 #define ST_BLOCK_SET 0x0002 /* block size, mode set by ioctl */ 320 #define ST_WRITTEN 0x0004 /* data has been written, EOD needed */ 321 #define ST_FIXEDBLOCKS 0x0008 322 #define ST_AT_FILEMARK 0x0010 323 #define ST_EIO_PENDING 0x0020 /* error reporting deferred until next op */ 324 #define ST_NEW_MOUNT 0x0040 /* still need to decide mode */ 325 #define ST_READONLY 0x0080 /* st_mode_sense says write protected */ 326 #define ST_FM_WRITTEN 0x0100 /* 327 * EOF file mark written -- used with 328 * ~ST_WRITTEN to indicate that multiple file 329 * marks have been written 330 */ 331 #define ST_BLANK_READ 0x0200 /* BLANK CHECK encountered already */ 332 #define ST_2FM_AT_EOD 0x0400 /* write 2 file marks at EOD */ 333 #define ST_MOUNTED 0x0800 /* Device is presently mounted */ 334 #define ST_DONTBUFFER 0x1000 /* Disable buffering/caching */ 335 #define ST_EARLYWARN 0x2000 /* Do (deferred) EOM for variable mode */ 336 #define ST_EOM_PENDING 0x4000 /* EOM reporting deferred until next op */ 337 338 #define ST_PER_ACTION (ST_AT_FILEMARK | ST_EIO_PENDING | ST_EOM_PENDING | \ 339 ST_BLANK_READ) 340 #define ST_PER_MOUNT (ST_INFO_VALID | ST_BLOCK_SET | ST_WRITTEN | \ 341 ST_FIXEDBLOCKS | ST_READONLY | ST_FM_WRITTEN | \ 342 ST_2FM_AT_EOD | ST_PER_ACTION) 343 344 #if defined(ST_ENABLE_EARLYWARN) 345 #define ST_INIT_FLAGS ST_EARLYWARN 346 #else 347 #define ST_INIT_FLAGS 0 348 #endif 349 350 /* 351 * The routine called by the low level scsi routine when it discovers 352 * A device suitable for this driver 353 */ 354 void 355 stattach(parent, self, aux) 356 struct device *parent, *self; 357 void *aux; 358 { 359 struct st_softc *st = (void *)self; 360 struct scsipibus_attach_args *sa = aux; 361 struct scsipi_periph *periph = sa->sa_periph; 362 363 SC_DEBUG(periph, SCSIPI_DB2, ("stattach: ")); 364 365 /* 366 * Store information needed to contact our base driver 367 */ 368 st->sc_periph = periph; 369 periph->periph_dev = &st->sc_dev; 370 periph->periph_switch = &st_switch; 371 372 /* 373 * Set initial flags 374 */ 375 376 st->flags = ST_INIT_FLAGS; 377 378 /* 379 * Check if the drive is a known criminal and take 380 * Any steps needed to bring it into line 381 */ 382 st_identify_drive(st, &sa->sa_inqbuf); 383 /* 384 * Use the subdriver to request information regarding the drive. 385 */ 386 printf("\n"); 387 printf("%s: %s", st->sc_dev.dv_xname, st->quirkdata ? "rogue, " : ""); 388 if (scsipi_test_unit_ready(periph, 389 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE) || 390 st_mode_sense(st, 391 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE)) 392 printf("drive empty\n"); 393 else { 394 printf("density code %d, ", st->media_density); 395 if (st->media_blksize > 0) 396 printf("%d-byte", st->media_blksize); 397 else 398 printf("variable"); 399 printf(" blocks, write-%s\n", 400 (st->flags & ST_READONLY) ? "protected" : "enabled"); 401 } 402 403 /* 404 * Set up the buf queue for this device 405 */ 406 BUFQ_INIT(&st->buf_queue); 407 408 #if NRND > 0 409 rnd_attach_source(&st->rnd_source, st->sc_dev.dv_xname, 410 RND_TYPE_TAPE, 0); 411 #endif 412 } 413 414 /* 415 * Use the inquiry routine in 'scsi_base' to get drive info so we can 416 * Further tailor our behaviour. 417 */ 418 void 419 st_identify_drive(st, inqbuf) 420 struct st_softc *st; 421 struct scsipi_inquiry_pattern *inqbuf; 422 { 423 struct st_quirk_inquiry_pattern *finger; 424 int priority; 425 426 finger = (struct st_quirk_inquiry_pattern *)scsipi_inqmatch(inqbuf, 427 (caddr_t)st_quirk_patterns, 428 sizeof(st_quirk_patterns) / sizeof(st_quirk_patterns[0]), 429 sizeof(st_quirk_patterns[0]), &priority); 430 if (priority != 0) { 431 st->quirkdata = &finger->quirkdata; 432 st->drive_quirks = finger->quirkdata.quirks; 433 st->quirks = finger->quirkdata.quirks; /* start value */ 434 st->page_0_size = finger->quirkdata.page_0_size; 435 st_loadquirks(st); 436 } 437 } 438 439 /* 440 * initialise the subdevices to the default (QUIRK) state. 441 * this will remove any setting made by the system operator or previous 442 * operations. 443 */ 444 void 445 st_loadquirks(st) 446 struct st_softc *st; 447 { 448 int i; 449 struct modes *mode; 450 struct modes *mode2; 451 452 mode = st->quirkdata->modes; 453 mode2 = st->modes; 454 for (i = 0; i < 4; i++) { 455 bzero(mode2, sizeof(struct modes)); 456 st->modeflags[i] &= ~(BLKSIZE_SET_BY_QUIRK | 457 DENSITY_SET_BY_QUIRK | BLKSIZE_SET_BY_USER | 458 DENSITY_SET_BY_USER); 459 if ((mode->quirks | st->drive_quirks) & ST_Q_FORCE_BLKSIZE) { 460 mode2->blksize = mode->blksize; 461 st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; 462 } 463 if (mode->density) { 464 mode2->density = mode->density; 465 st->modeflags[i] |= DENSITY_SET_BY_QUIRK; 466 } 467 mode2->quirks |= mode->quirks; 468 mode++; 469 mode2++; 470 } 471 } 472 473 /* 474 * open the device. 475 */ 476 int 477 stopen(dev, flags, mode, p) 478 dev_t dev; 479 int flags; 480 int mode; 481 struct proc *p; 482 { 483 u_int stmode, dsty; 484 int error, sflags, unit, tries, ntries; 485 struct st_softc *st; 486 struct scsipi_periph *periph; 487 struct scsipi_adapter *adapt; 488 489 unit = STUNIT(dev); 490 if (unit >= st_cd.cd_ndevs) 491 return (ENXIO); 492 st = st_cd.cd_devs[unit]; 493 if (st == NULL) 494 return (ENXIO); 495 496 stmode = STMODE(dev); 497 dsty = STDSTY(dev); 498 499 periph = st->sc_periph; 500 adapt = periph->periph_channel->chan_adapter; 501 502 SC_DEBUG(periph, SCSIPI_DB1, ("open: dev=0x%x (unit %d (of %d))\n", dev, 503 unit, st_cd.cd_ndevs)); 504 505 506 /* 507 * Only allow one at a time 508 */ 509 if (periph->periph_flags & PERIPH_OPEN) { 510 printf("%s: already open\n", st->sc_dev.dv_xname); 511 return (EBUSY); 512 } 513 514 if ((error = scsipi_adapter_addref(adapt)) != 0) 515 return (error); 516 517 /* 518 * clear any latched errors. 519 */ 520 st->mt_resid = 0; 521 st->mt_erreg = 0; 522 st->asc = 0; 523 st->ascq = 0; 524 525 /* 526 * Catch any unit attention errors. Be silent about this 527 * unless we're already mounted. We ignore media change 528 * if we're in control mode or not mounted yet. 529 */ 530 if ((st->flags & ST_MOUNTED) == 0 || stmode == CTRL_MODE) { 531 #ifdef SCSIDEBUG 532 sflags = XS_CTL_IGNORE_MEDIA_CHANGE; 533 #else 534 sflags = XS_CTL_SILENT|XS_CTL_IGNORE_MEDIA_CHANGE; 535 #endif 536 } else 537 sflags = 0; 538 539 /* 540 * If we're already mounted or we aren't configured for 541 * a mount delay, only try a test unit ready once. Otherwise, 542 * try up to ST_MOUNT_DELAY times with a rest interval of 543 * one second between each try. 544 */ 545 546 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0) { 547 ntries = 1; 548 } else { 549 ntries = ST_MOUNT_DELAY; 550 } 551 552 for (error = tries = 0; tries < ntries; tries++) { 553 int slpintr, oflags; 554 555 /* 556 * If we had no error, or we're opening the control mode 557 * device, we jump out right away. 558 */ 559 560 error = scsipi_test_unit_ready(periph, sflags); 561 if (error == 0 || stmode == CTRL_MODE) { 562 break; 563 } 564 565 /* 566 * We had an error. 567 * 568 * If we're already mounted or we aren't configured for 569 * a mount delay, or the error isn't a NOT READY error, 570 * skip to the error exit now. 571 */ 572 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0 || 573 (st->mt_key != SKEY_NOT_READY)) { 574 goto bad; 575 } 576 577 /* 578 * clear any latched errors. 579 */ 580 st->mt_resid = 0; 581 st->mt_erreg = 0; 582 st->asc = 0; 583 st->ascq = 0; 584 585 /* 586 * Fake that we have the device open so 587 * we block other apps from getting in. 588 */ 589 590 oflags = periph->periph_flags; 591 periph->periph_flags |= PERIPH_OPEN; 592 593 slpintr = tsleep(&lbolt, PUSER|PCATCH, "stload", 0); 594 595 periph->periph_flags = oflags; /* restore flags */ 596 if (slpintr) { 597 goto bad; 598 } 599 } 600 601 602 /* 603 * If the mode is 3 (e.g. minor = 3,7,11,15) then the device has 604 * been opened to set defaults and perform other, usually non-I/O 605 * related, operations. In this case, do a quick check to see 606 * whether the unit actually had a tape loaded (this will be known 607 * as to whether or not we got a NOT READY for the above 608 * unit attention). If a tape is there, go do a mount sequence. 609 */ 610 if (stmode == CTRL_MODE && st->mt_key == SKEY_NOT_READY) { 611 periph->periph_flags |= PERIPH_OPEN; 612 return (0); 613 } 614 615 /* 616 * If we get this far and had an error set, that means we failed 617 * to pass the 'test unit ready' test for the non-controlmode device, 618 * so we bounce the open. 619 */ 620 621 if (error) 622 return (error); 623 624 /* 625 * Else, we're now committed to saying we're open. 626 */ 627 628 periph->periph_flags |= PERIPH_OPEN; /* unit attn are now errors */ 629 630 /* 631 * If it's a different mode, or if the media has been 632 * invalidated, unmount the tape from the previous 633 * session but continue with open processing 634 */ 635 if (st->last_dsty != dsty || 636 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 637 st_unmount(st, NOEJECT); 638 639 /* 640 * If we are not mounted, then we should start a new 641 * mount session. 642 */ 643 if (!(st->flags & ST_MOUNTED)) { 644 if ((error = st_mount_tape(dev, flags)) != 0) 645 goto bad; 646 st->last_dsty = dsty; 647 } 648 649 SC_DEBUG(periph, SCSIPI_DB2, ("open complete\n")); 650 return (0); 651 652 bad: 653 st_unmount(st, NOEJECT); 654 scsipi_adapter_delref(adapt); 655 periph->periph_flags &= ~PERIPH_OPEN; 656 return (error); 657 } 658 659 /* 660 * close the device.. only called if we are the LAST 661 * occurence of an open device 662 */ 663 int 664 stclose(dev, flags, mode, p) 665 dev_t dev; 666 int flags; 667 int mode; 668 struct proc *p; 669 { 670 int stxx, error = 0; 671 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 672 struct scsipi_periph *periph = st->sc_periph; 673 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 674 675 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("closing\n")); 676 677 /* 678 * Make sure that a tape opened in write-only mode will have 679 * file marks written on it when closed, even if not written to. 680 * 681 * This is for SUN compatibility. Actually, the Sun way of 682 * things is to: 683 * 684 * only write filemarks if there are fmks to be written and 685 * - open for write (possibly read/write) 686 * - the last operation was a write 687 * or: 688 * - opened for wronly 689 * - no data was written (including filemarks) 690 */ 691 692 stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); 693 if (((flags & FWRITE) && stxx == ST_WRITTEN) || 694 ((flags & O_ACCMODE) == FWRITE && stxx == 0)) { 695 int nm; 696 error = st_check_eod(st, FALSE, &nm, 0); 697 } 698 699 switch (STMODE(dev)) { 700 case NORMAL_MODE: 701 st_unmount(st, NOEJECT); 702 break; 703 case NOREW_MODE: 704 case CTRL_MODE: 705 /* 706 * Leave mounted unless media seems to have been removed. 707 * 708 * Otherwise, if we're to terminate a tape with more than one 709 * filemark [ and because we're not rewinding here ], backspace 710 * one filemark so that later appends will see an unbroken 711 * sequence of: 712 * 713 * file - FMK - file - FMK ... file - FMK FMK (EOM) 714 */ 715 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 716 st_unmount(st, NOEJECT); 717 } else if (error == 0) { 718 /* 719 * ST_WRITTEN was preserved from above. 720 * 721 * All we need to know here is: 722 * 723 * Were we writing this tape and was the last 724 * operation a write? 725 * 726 * Are there supposed to be 2FM at EOD? 727 * 728 * If both statements are true, then we backspace 729 * one filemark. 730 */ 731 stxx |= (st->flags & ST_2FM_AT_EOD); 732 if ((flags & FWRITE) != 0 && 733 (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { 734 error = st_space(st, -1, SP_FILEMARKS, 0); 735 } 736 } 737 break; 738 case EJECT_MODE: 739 st_unmount(st, EJECT); 740 break; 741 } 742 743 scsipi_wait_drain(periph); 744 745 scsipi_adapter_delref(adapt); 746 periph->periph_flags &= ~PERIPH_OPEN; 747 748 return (error); 749 } 750 751 /* 752 * Start a new mount session. 753 * Copy in all the default parameters from the selected device mode. 754 * and try guess any that seem to be defaulted. 755 */ 756 int 757 st_mount_tape(dev, flags) 758 dev_t dev; 759 int flags; 760 { 761 int unit; 762 u_int dsty; 763 struct st_softc *st; 764 struct scsipi_periph *periph; 765 int error = 0; 766 767 unit = STUNIT(dev); 768 dsty = STDSTY(dev); 769 st = st_cd.cd_devs[unit]; 770 periph = st->sc_periph; 771 772 if (st->flags & ST_MOUNTED) 773 return (0); 774 775 SC_DEBUG(periph, SCSIPI_DB1, ("mounting\n ")); 776 st->flags |= ST_NEW_MOUNT; 777 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 778 /* 779 * If the media is new, then make sure we give it a chance to 780 * to do a 'load' instruction. (We assume it is new.) 781 */ 782 if ((error = st_load(st, LD_LOAD, XS_CTL_SILENT)) != 0) 783 return (error); 784 /* 785 * Throw another dummy instruction to catch 786 * 'Unit attention' errors. Many drives give 787 * these after doing a Load instruction (with 788 * the MEDIUM MAY HAVE CHANGED asc/ascq). 789 */ 790 scsipi_test_unit_ready(periph, XS_CTL_SILENT); /* XXX */ 791 792 /* 793 * Some devices can't tell you much until they have been 794 * asked to look at the media. This quirk does this. 795 */ 796 if (st->quirks & ST_Q_SENSE_HELP) 797 if ((error = st_touch_tape(st)) != 0) 798 return (error); 799 /* 800 * Load the physical device parameters 801 * loads: blkmin, blkmax 802 */ 803 if ((error = st_read_block_limits(st, 0)) != 0) 804 return (error); 805 /* 806 * Load the media dependent parameters 807 * includes: media_blksize,media_density,numblks 808 * As we have a tape in, it should be reflected here. 809 * If not you may need the "quirk" above. 810 */ 811 if ((error = st_mode_sense(st, 0)) != 0) 812 return (error); 813 /* 814 * If we have gained a permanent density from somewhere, 815 * then use it in preference to the one supplied by 816 * default by the driver. 817 */ 818 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 819 st->density = st->modes[dsty].density; 820 else 821 st->density = st->media_density; 822 /* 823 * If we have gained a permanent blocksize 824 * then use it in preference to the one supplied by 825 * default by the driver. 826 */ 827 st->flags &= ~ST_FIXEDBLOCKS; 828 if (st->modeflags[dsty] & 829 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 830 st->blksize = st->modes[dsty].blksize; 831 if (st->blksize) 832 st->flags |= ST_FIXEDBLOCKS; 833 } else { 834 if ((error = st_decide_mode(st, FALSE)) != 0) 835 return (error); 836 } 837 if ((error = st_mode_select(st, 0)) != 0) { 838 printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); 839 return (error); 840 } 841 if (!(st->quirks & ST_Q_NOPREVENT)) { 842 scsipi_prevent(periph, PR_PREVENT, 843 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 844 } 845 st->flags &= ~ST_NEW_MOUNT; 846 st->flags |= ST_MOUNTED; 847 periph->periph_flags |= PERIPH_MEDIA_LOADED; /* move earlier? */ 848 849 return (0); 850 } 851 852 /* 853 * End the present mount session. 854 * Rewind, and optionally eject the tape. 855 * Reset various flags to indicate that all new 856 * operations require another mount operation 857 */ 858 void 859 st_unmount(st, eject) 860 struct st_softc *st; 861 boolean eject; 862 { 863 struct scsipi_periph *periph = st->sc_periph; 864 int nmarks; 865 866 if ((st->flags & ST_MOUNTED) == 0) 867 return; 868 SC_DEBUG(periph, SCSIPI_DB1, ("unmounting\n")); 869 st_check_eod(st, FALSE, &nmarks, XS_CTL_IGNORE_NOT_READY); 870 st_rewind(st, 0, XS_CTL_IGNORE_NOT_READY); 871 872 /* 873 * Section 9.3.3 of the SCSI specs states that a device shall return 874 * the density value specified in the last succesfull MODE SELECT 875 * after an unload operation, in case it is not able to 876 * automatically determine the density of the new medium. 877 * 878 * So we instruct the device to use the default density, which will 879 * prevent the use of stale density values (in particular, 880 * in st_touch_tape(). 881 */ 882 st->density = 0; 883 if (st_mode_select(st, 0) != 0) { 884 printf("%s: WARNING: cannot revert to default density\n", 885 st->sc_dev.dv_xname); 886 } 887 888 scsipi_prevent(periph, PR_ALLOW, 889 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 890 if (eject) 891 st_load(st, LD_UNLOAD, XS_CTL_IGNORE_NOT_READY); 892 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 893 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 894 } 895 896 /* 897 * Given all we know about the device, media, mode, 'quirks' and 898 * initial operation, make a decision as to how we should be set 899 * to run (regarding blocking and EOD marks) 900 */ 901 int 902 st_decide_mode(st, first_read) 903 struct st_softc *st; 904 boolean first_read; 905 { 906 907 SC_DEBUG(st->sc_periph, SCSIPI_DB2, ("starting block mode decision\n")); 908 909 /* 910 * If the drive can only handle fixed-length blocks and only at 911 * one size, perhaps we should just do that. 912 */ 913 if (st->blkmin && (st->blkmin == st->blkmax)) { 914 st->flags |= ST_FIXEDBLOCKS; 915 st->blksize = st->blkmin; 916 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 917 ("blkmin == blkmax of %d\n", st->blkmin)); 918 goto done; 919 } 920 /* 921 * If the tape density mandates (or even suggests) use of fixed 922 * or variable-length blocks, comply. 923 */ 924 switch (st->density) { 925 case HALFINCH_800: 926 case HALFINCH_1600: 927 case HALFINCH_6250: 928 case DDS: 929 st->flags &= ~ST_FIXEDBLOCKS; 930 st->blksize = 0; 931 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 932 ("density specified variable\n")); 933 goto done; 934 case QIC_11: 935 case QIC_24: 936 case QIC_120: 937 case QIC_150: 938 case QIC_525: 939 case QIC_1320: 940 case QIC_3095: 941 case QIC_3220: 942 st->flags |= ST_FIXEDBLOCKS; 943 if (st->media_blksize > 0) 944 st->blksize = st->media_blksize; 945 else 946 st->blksize = DEF_FIXED_BSIZE; 947 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 948 ("density specified fixed\n")); 949 goto done; 950 } 951 /* 952 * If we're about to read the tape, perhaps we should choose 953 * fixed or variable-length blocks and block size according to 954 * what the drive found on the tape. 955 */ 956 if (first_read && 957 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 958 (st->media_blksize == DEF_FIXED_BSIZE) || 959 (st->media_blksize == 1024))) { 960 if (st->media_blksize > 0) 961 st->flags |= ST_FIXEDBLOCKS; 962 else 963 st->flags &= ~ST_FIXEDBLOCKS; 964 st->blksize = st->media_blksize; 965 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 966 ("Used media_blksize of %d\n", st->media_blksize)); 967 goto done; 968 } 969 /* 970 * We're getting no hints from any direction. Choose variable- 971 * length blocks arbitrarily. 972 */ 973 st->flags &= ~ST_FIXEDBLOCKS; 974 st->blksize = 0; 975 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 976 ("Give up and default to variable mode\n")); 977 978 done: 979 /* 980 * Decide whether or not to write two file marks to signify end- 981 * of-data. Make the decision as a function of density. If 982 * the decision is not to use a second file mark, the SCSI BLANK 983 * CHECK condition code will be recognized as end-of-data when 984 * first read. 985 * (I think this should be a by-product of fixed/variable..julian) 986 */ 987 switch (st->density) { 988 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 989 case QIC_11: 990 case QIC_24: 991 case QIC_120: 992 case QIC_150: 993 case QIC_525: 994 case QIC_1320: 995 case QIC_3095: 996 case QIC_3220: 997 st->flags &= ~ST_2FM_AT_EOD; 998 break; 999 default: 1000 st->flags |= ST_2FM_AT_EOD; 1001 } 1002 return (0); 1003 } 1004 1005 /* 1006 * Actually translate the requested transfer into 1007 * one the physical driver can understand 1008 * The transfer is described by a buf and will include 1009 * only one physical transfer. 1010 */ 1011 void 1012 ststrategy(bp) 1013 struct buf *bp; 1014 { 1015 struct st_softc *st = st_cd.cd_devs[STUNIT(bp->b_dev)]; 1016 int s; 1017 1018 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1019 ("ststrategy %ld bytes @ blk %d\n", bp->b_bcount, bp->b_blkno)); 1020 /* 1021 * If it's a null transfer, return immediatly 1022 */ 1023 if (bp->b_bcount == 0) 1024 goto done; 1025 1026 /* If offset is negative, error */ 1027 if (bp->b_blkno < 0) { 1028 bp->b_error = EINVAL; 1029 goto bad; 1030 } 1031 1032 /* 1033 * Odd sized request on fixed drives are verboten 1034 */ 1035 if (st->flags & ST_FIXEDBLOCKS) { 1036 if (bp->b_bcount % st->blksize) { 1037 printf("%s: bad request, must be multiple of %d\n", 1038 st->sc_dev.dv_xname, st->blksize); 1039 bp->b_error = EIO; 1040 goto bad; 1041 } 1042 } 1043 /* 1044 * as are out-of-range requests on variable drives. 1045 */ 1046 else if (bp->b_bcount < st->blkmin || 1047 (st->blkmax && bp->b_bcount > st->blkmax)) { 1048 printf("%s: bad request, must be between %d and %d\n", 1049 st->sc_dev.dv_xname, st->blkmin, st->blkmax); 1050 bp->b_error = EIO; 1051 goto bad; 1052 } 1053 s = splbio(); 1054 1055 /* 1056 * Place it in the queue of activities for this tape 1057 * at the end (a bit silly because we only have on user.. 1058 * (but it could fork())) 1059 */ 1060 BUFQ_INSERT_TAIL(&st->buf_queue, bp); 1061 1062 /* 1063 * Tell the device to get going on the transfer if it's 1064 * not doing anything, otherwise just wait for completion 1065 * (All a bit silly if we're only allowing 1 open but..) 1066 */ 1067 ststart(st->sc_periph); 1068 1069 splx(s); 1070 return; 1071 bad: 1072 bp->b_flags |= B_ERROR; 1073 done: 1074 /* 1075 * Correctly set the buf to indicate a completed xfer 1076 */ 1077 bp->b_resid = bp->b_bcount; 1078 biodone(bp); 1079 return; 1080 } 1081 1082 /* 1083 * ststart looks to see if there is a buf waiting for the device 1084 * and that the device is not already busy. If both are true, 1085 * It dequeues the buf and creates a scsi command to perform the 1086 * transfer required. The transfer request will call scsipi_done 1087 * on completion, which will in turn call this routine again 1088 * so that the next queued transfer is performed. 1089 * The bufs are queued by the strategy routine (ststrategy) 1090 * 1091 * This routine is also called after other non-queued requests 1092 * have been made of the scsi driver, to ensure that the queue 1093 * continues to be drained. 1094 * ststart() is called at splbio 1095 */ 1096 void 1097 ststart(periph) 1098 struct scsipi_periph *periph; 1099 { 1100 struct st_softc *st = (void *)periph->periph_dev; 1101 struct buf *bp; 1102 struct scsi_rw_tape cmd; 1103 int flags, error; 1104 1105 SC_DEBUG(periph, SCSIPI_DB2, ("ststart ")); 1106 /* 1107 * See if there is a buf to do and we are not already 1108 * doing one 1109 */ 1110 while (periph->periph_active < periph->periph_openings) { 1111 /* if a special awaits, let it proceed first */ 1112 if (periph->periph_flags & PERIPH_WAITING) { 1113 periph->periph_flags &= ~PERIPH_WAITING; 1114 wakeup((caddr_t)periph); 1115 return; 1116 } 1117 1118 if ((bp = BUFQ_FIRST(&st->buf_queue)) == NULL) 1119 return; 1120 BUFQ_REMOVE(&st->buf_queue, bp); 1121 1122 /* 1123 * If the device has been unmounted by the user 1124 * then throw away all requests until done. 1125 */ 1126 if ((st->flags & ST_MOUNTED) == 0 || 1127 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 1128 /* make sure that one implies the other.. */ 1129 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 1130 bp->b_flags |= B_ERROR; 1131 bp->b_error = EIO; 1132 bp->b_resid = bp->b_bcount; 1133 biodone(bp); 1134 continue; 1135 } 1136 /* 1137 * only FIXEDBLOCK devices have pending I/O or space operations. 1138 */ 1139 if (st->flags & ST_FIXEDBLOCKS) { 1140 /* 1141 * If we are at a filemark but have not reported it yet 1142 * then we should report it now 1143 */ 1144 if (st->flags & ST_AT_FILEMARK) { 1145 if ((bp->b_flags & B_READ) == B_WRITE) { 1146 /* 1147 * Handling of ST_AT_FILEMARK in 1148 * st_space will fill in the right file 1149 * mark count. 1150 * Back up over filemark 1151 */ 1152 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1153 bp->b_flags |= B_ERROR; 1154 bp->b_error = EIO; 1155 biodone(bp); 1156 continue; 1157 } 1158 } else { 1159 bp->b_resid = bp->b_bcount; 1160 bp->b_error = 0; 1161 bp->b_flags &= ~B_ERROR; 1162 st->flags &= ~ST_AT_FILEMARK; 1163 biodone(bp); 1164 continue; /* seek more work */ 1165 } 1166 } 1167 } 1168 /* 1169 * If we are at EOM but have not reported it 1170 * yet then we should report it now. 1171 */ 1172 if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { 1173 bp->b_resid = bp->b_bcount; 1174 if (st->flags & ST_EIO_PENDING) { 1175 bp->b_error = EIO; 1176 bp->b_flags |= B_ERROR; 1177 } 1178 st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); 1179 biodone(bp); 1180 continue; /* seek more work */ 1181 } 1182 1183 /* 1184 * Fill out the scsi command 1185 */ 1186 bzero(&cmd, sizeof(cmd)); 1187 flags = XS_CTL_NOSLEEP | XS_CTL_ASYNC; 1188 if ((bp->b_flags & B_READ) == B_WRITE) { 1189 cmd.opcode = WRITE; 1190 st->flags &= ~ST_FM_WRITTEN; 1191 flags |= XS_CTL_DATA_OUT; 1192 } else { 1193 cmd.opcode = READ; 1194 flags |= XS_CTL_DATA_IN; 1195 } 1196 1197 /* 1198 * Handle "fixed-block-mode" tape drives by using the 1199 * block count instead of the length. 1200 */ 1201 if (st->flags & ST_FIXEDBLOCKS) { 1202 cmd.byte2 |= SRW_FIXED; 1203 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1204 } else 1205 _lto3b(bp->b_bcount, cmd.len); 1206 1207 /* 1208 * go ask the adapter to do all this for us 1209 */ 1210 error = scsipi_command(periph, 1211 (struct scsipi_generic *)&cmd, sizeof(cmd), 1212 (u_char *)bp->b_data, bp->b_bcount, 1213 0, ST_IO_TIME, bp, flags); 1214 if (error) { 1215 printf("%s: not queued, error %d\n", 1216 st->sc_dev.dv_xname, error); 1217 } 1218 } /* go back and see if we can cram more work in.. */ 1219 } 1220 1221 void 1222 stdone(xs) 1223 struct scsipi_xfer *xs; 1224 { 1225 struct st_softc *st = (void *)xs->xs_periph->periph_dev; 1226 1227 if (xs->bp != NULL) { 1228 if ((xs->bp->b_flags & B_READ) == B_WRITE) { 1229 st->flags |= ST_WRITTEN; 1230 } else { 1231 st->flags &= ~ST_WRITTEN; 1232 } 1233 #if NRND > 0 1234 rnd_add_uint32(&st->rnd_source, xs->bp->b_blkno); 1235 #endif 1236 } 1237 } 1238 1239 int 1240 stread(dev, uio, iomode) 1241 dev_t dev; 1242 struct uio *uio; 1243 int iomode; 1244 { 1245 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1246 1247 return (physio(ststrategy, NULL, dev, B_READ, 1248 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1249 } 1250 1251 int 1252 stwrite(dev, uio, iomode) 1253 dev_t dev; 1254 struct uio *uio; 1255 int iomode; 1256 { 1257 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1258 1259 return (physio(ststrategy, NULL, dev, B_WRITE, 1260 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1261 } 1262 1263 /* 1264 * Perform special action on behalf of the user; 1265 * knows about the internals of this device 1266 */ 1267 int 1268 stioctl(dev, cmd, arg, flag, p) 1269 dev_t dev; 1270 u_long cmd; 1271 caddr_t arg; 1272 int flag; 1273 struct proc *p; 1274 { 1275 int error = 0; 1276 int unit; 1277 int number, nmarks, dsty; 1278 int flags; 1279 struct st_softc *st; 1280 int hold_blksize; 1281 u_int8_t hold_density; 1282 struct mtop *mt = (struct mtop *) arg; 1283 1284 /* 1285 * Find the device that the user is talking about 1286 */ 1287 flags = 0; /* give error messages, act on errors etc. */ 1288 unit = STUNIT(dev); 1289 dsty = STDSTY(dev); 1290 st = st_cd.cd_devs[unit]; 1291 hold_blksize = st->blksize; 1292 hold_density = st->density; 1293 1294 switch ((u_int) cmd) { 1295 1296 case MTIOCGET: { 1297 struct mtget *g = (struct mtget *) arg; 1298 /* 1299 * (to get the current state of READONLY) 1300 */ 1301 error = st_mode_sense(st, XS_CTL_SILENT); 1302 if (error) { 1303 /* 1304 * Ignore the error if in control mode; 1305 * this is mandated by st(4). 1306 */ 1307 if (STMODE(dev) != CTRL_MODE) 1308 break; 1309 error = 0; 1310 } 1311 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("[ioctl: get status]\n")); 1312 bzero(g, sizeof(struct mtget)); 1313 g->mt_type = 0x7; /* Ultrix compat *//*? */ 1314 g->mt_blksiz = st->blksize; 1315 g->mt_density = st->density; 1316 g->mt_mblksiz[0] = st->modes[0].blksize; 1317 g->mt_mblksiz[1] = st->modes[1].blksize; 1318 g->mt_mblksiz[2] = st->modes[2].blksize; 1319 g->mt_mblksiz[3] = st->modes[3].blksize; 1320 g->mt_mdensity[0] = st->modes[0].density; 1321 g->mt_mdensity[1] = st->modes[1].density; 1322 g->mt_mdensity[2] = st->modes[2].density; 1323 g->mt_mdensity[3] = st->modes[3].density; 1324 if (st->flags & ST_READONLY) 1325 g->mt_dsreg |= MT_DS_RDONLY; 1326 if (st->flags & ST_MOUNTED) 1327 g->mt_dsreg |= MT_DS_MOUNTED; 1328 g->mt_resid = st->mt_resid; 1329 g->mt_erreg = st->mt_erreg; 1330 /* 1331 * clear latched errors. 1332 */ 1333 st->mt_resid = 0; 1334 st->mt_erreg = 0; 1335 st->asc = 0; 1336 st->ascq = 0; 1337 break; 1338 } 1339 case MTIOCTOP: { 1340 1341 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1342 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1343 mt->mt_count)); 1344 1345 /* compat: in U*x it is a short */ 1346 number = mt->mt_count; 1347 switch ((short) (mt->mt_op)) { 1348 case MTWEOF: /* write an end-of-file record */ 1349 error = st_write_filemarks(st, number, flags); 1350 break; 1351 case MTBSF: /* backward space file */ 1352 number = -number; 1353 case MTFSF: /* forward space file */ 1354 error = st_check_eod(st, FALSE, &nmarks, flags); 1355 if (!error) 1356 error = st_space(st, number - nmarks, 1357 SP_FILEMARKS, flags); 1358 break; 1359 case MTBSR: /* backward space record */ 1360 number = -number; 1361 case MTFSR: /* forward space record */ 1362 error = st_check_eod(st, TRUE, &nmarks, flags); 1363 if (!error) 1364 error = st_space(st, number, SP_BLKS, flags); 1365 break; 1366 case MTREW: /* rewind */ 1367 error = st_rewind(st, 0, flags); 1368 break; 1369 case MTOFFL: /* rewind and put the drive offline */ 1370 st_unmount(st, EJECT); 1371 break; 1372 case MTNOP: /* no operation, sets status only */ 1373 break; 1374 case MTRETEN: /* retension the tape */ 1375 error = st_load(st, LD_RETENSION, flags); 1376 if (!error) 1377 error = st_load(st, LD_LOAD, flags); 1378 break; 1379 case MTEOM: /* forward space to end of media */ 1380 error = st_check_eod(st, FALSE, &nmarks, flags); 1381 if (!error) 1382 error = st_space(st, 1, SP_EOM, flags); 1383 break; 1384 case MTCACHE: /* enable controller cache */ 1385 st->flags &= ~ST_DONTBUFFER; 1386 goto try_new_value; 1387 case MTNOCACHE: /* disable controller cache */ 1388 st->flags |= ST_DONTBUFFER; 1389 goto try_new_value; 1390 case MTERASE: /* erase volume */ 1391 error = st_erase(st, number, flags); 1392 break; 1393 case MTSETBSIZ: /* Set block size for device */ 1394 #ifdef NOTYET 1395 if (!(st->flags & ST_NEW_MOUNT)) { 1396 uprintf("re-mount tape before changing blocksize"); 1397 error = EINVAL; 1398 break; 1399 } 1400 #endif 1401 if (number == 0) 1402 st->flags &= ~ST_FIXEDBLOCKS; 1403 else { 1404 if ((st->blkmin || st->blkmax) && 1405 (number < st->blkmin || 1406 number > st->blkmax)) { 1407 error = EINVAL; 1408 break; 1409 } 1410 st->flags |= ST_FIXEDBLOCKS; 1411 } 1412 st->blksize = number; 1413 st->flags |= ST_BLOCK_SET; /*XXX */ 1414 goto try_new_value; 1415 1416 case MTSETDNSTY: /* Set density for device and mode */ 1417 /* 1418 * Any number >= 0 and <= 0xff is legal. Numbers 1419 * above 0x80 are 'vendor unique'. 1420 */ 1421 if (number < 0 || number > 255) { 1422 error = EINVAL; 1423 break; 1424 } else 1425 st->density = number; 1426 goto try_new_value; 1427 1428 case MTCMPRESS: 1429 error = st_cmprss(st, number); 1430 break; 1431 1432 case MTEWARN: 1433 if (number) 1434 st->flags |= ST_EARLYWARN; 1435 else 1436 st->flags &= ~ST_EARLYWARN; 1437 break; 1438 1439 default: 1440 error = EINVAL; 1441 } 1442 break; 1443 } 1444 case MTIOCIEOT: 1445 case MTIOCEEOT: 1446 break; 1447 1448 case MTIOCRDSPOS: 1449 error = st_rdpos(st, 0, (u_int32_t *) arg); 1450 break; 1451 1452 case MTIOCRDHPOS: 1453 error = st_rdpos(st, 1, (u_int32_t *) arg); 1454 break; 1455 1456 case MTIOCSLOCATE: 1457 error = st_setpos(st, 0, (u_int32_t *) arg); 1458 break; 1459 1460 case MTIOCHLOCATE: 1461 error = st_setpos(st, 1, (u_int32_t *) arg); 1462 break; 1463 1464 1465 default: 1466 error = scsipi_do_ioctl(st->sc_periph, dev, cmd, arg, 1467 flag, p); 1468 break; 1469 } 1470 return (error); 1471 /*-----------------------------*/ 1472 try_new_value: 1473 /* 1474 * Check that the mode being asked for is aggreeable to the 1475 * drive. If not, put it back the way it was. 1476 * 1477 * If in control mode, we can make (persistent) mode changes 1478 * even if no medium is loaded (see st(4)). 1479 */ 1480 if ((STMODE(dev) != CTRL_MODE || (st->flags & ST_MOUNTED) != 0) && 1481 (error = st_mode_select(st, 0)) != 0) { 1482 /* put it back as it was */ 1483 printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); 1484 st->density = hold_density; 1485 st->blksize = hold_blksize; 1486 if (st->blksize) 1487 st->flags |= ST_FIXEDBLOCKS; 1488 else 1489 st->flags &= ~ST_FIXEDBLOCKS; 1490 return (error); 1491 } 1492 /* 1493 * As the drive liked it, if we are setting a new default, 1494 * set it into the structures as such. 1495 * 1496 * The means for deciding this are not finalised yet- but 1497 * if the device was opened in Control Mode, the values 1498 * are persistent now across mounts. 1499 */ 1500 if (STMODE(dev) == CTRL_MODE) { 1501 switch ((short) (mt->mt_op)) { 1502 case MTSETBSIZ: 1503 st->modes[dsty].blksize = st->blksize; 1504 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1505 break; 1506 case MTSETDNSTY: 1507 st->modes[dsty].density = st->density; 1508 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1509 break; 1510 } 1511 } 1512 return (0); 1513 } 1514 1515 /* 1516 * Do a synchronous read. 1517 */ 1518 int 1519 st_read(st, buf, size, flags) 1520 struct st_softc *st; 1521 int size; 1522 int flags; 1523 char *buf; 1524 { 1525 struct scsi_rw_tape cmd; 1526 1527 /* 1528 * If it's a null transfer, return immediatly 1529 */ 1530 if (size == 0) 1531 return (0); 1532 bzero(&cmd, sizeof(cmd)); 1533 cmd.opcode = READ; 1534 if (st->flags & ST_FIXEDBLOCKS) { 1535 cmd.byte2 |= SRW_FIXED; 1536 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1537 cmd.len); 1538 } else 1539 _lto3b(size, cmd.len); 1540 return (scsipi_command(st->sc_periph, 1541 (struct scsipi_generic *)&cmd, sizeof(cmd), 1542 (u_char *)buf, size, 0, ST_IO_TIME, NULL, flags | XS_CTL_DATA_IN)); 1543 } 1544 1545 /* 1546 * Ask the drive what it's min and max blk sizes are. 1547 */ 1548 int 1549 st_read_block_limits(st, flags) 1550 struct st_softc *st; 1551 int flags; 1552 { 1553 struct scsi_block_limits cmd; 1554 struct scsi_block_limits_data block_limits; 1555 struct scsipi_periph *periph = st->sc_periph; 1556 int error; 1557 1558 /* 1559 * do a 'Read Block Limits' 1560 */ 1561 bzero(&cmd, sizeof(cmd)); 1562 cmd.opcode = READ_BLOCK_LIMITS; 1563 1564 /* 1565 * do the command, update the global values 1566 */ 1567 error = scsipi_command(periph, (struct scsipi_generic *)&cmd, 1568 sizeof(cmd), (u_char *)&block_limits, sizeof(block_limits), 1569 ST_RETRIES, ST_CTL_TIME, NULL, 1570 flags | XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); 1571 if (error) 1572 return (error); 1573 1574 st->blkmin = _2btol(block_limits.min_length); 1575 st->blkmax = _3btol(block_limits.max_length); 1576 1577 SC_DEBUG(periph, SCSIPI_DB3, 1578 ("(%d <= blksize <= %d)\n", st->blkmin, st->blkmax)); 1579 return (0); 1580 } 1581 1582 /* 1583 * Get the scsi driver to send a full inquiry to the 1584 * device and use the results to fill out the global 1585 * parameter structure. 1586 * 1587 * called from: 1588 * attach 1589 * open 1590 * ioctl (to reset original blksize) 1591 */ 1592 int 1593 st_mode_sense(st, flags) 1594 struct st_softc *st; 1595 int flags; 1596 { 1597 u_int scsipi_sense_len; 1598 int error; 1599 struct scsipi_sense { 1600 struct scsipi_mode_header header; 1601 struct scsi_blk_desc blk_desc; 1602 u_char sense_data[MAX_PAGE_0_SIZE]; 1603 } scsipi_sense; 1604 struct scsipi_periph *periph = st->sc_periph; 1605 1606 scsipi_sense_len = 12 + st->page_0_size; 1607 1608 /* 1609 * Set up a mode sense 1610 * We don't need the results. Just print them for our interest's sake, 1611 * if asked, or if we need it as a template for the mode select store 1612 * it away. 1613 */ 1614 error = scsipi_mode_sense(st->sc_periph, 0, SMS_PAGE_CTRL_CURRENT, 1615 &scsipi_sense.header, scsipi_sense_len, flags | XS_CTL_DATA_ONSTACK, 1616 ST_RETRIES, ST_CTL_TIME); 1617 1618 if (error) 1619 return (error); 1620 1621 st->numblks = _3btol(scsipi_sense.blk_desc.nblocks); 1622 st->media_blksize = _3btol(scsipi_sense.blk_desc.blklen); 1623 st->media_density = scsipi_sense.blk_desc.density; 1624 if (scsipi_sense.header.dev_spec & SMH_DSP_WRITE_PROT) 1625 st->flags |= ST_READONLY; 1626 else 1627 st->flags &= ~ST_READONLY; 1628 SC_DEBUG(periph, SCSIPI_DB3, 1629 ("density code %d, %d-byte blocks, write-%s, ", 1630 st->media_density, st->media_blksize, 1631 st->flags & ST_READONLY ? "protected" : "enabled")); 1632 SC_DEBUG(periph, SCSIPI_DB3, 1633 ("%sbuffered\n", 1634 scsipi_sense.header.dev_spec & SMH_DSP_BUFF_MODE ? "" : "un")); 1635 if (st->page_0_size) 1636 bcopy(scsipi_sense.sense_data, st->sense_data, 1637 st->page_0_size); 1638 periph->periph_flags |= PERIPH_MEDIA_LOADED; 1639 return (0); 1640 } 1641 1642 /* 1643 * Send a filled out parameter structure to the drive to 1644 * set it into the desire modes etc. 1645 */ 1646 int 1647 st_mode_select(st, flags) 1648 struct st_softc *st; 1649 int flags; 1650 { 1651 u_int scsi_select_len; 1652 struct scsi_select { 1653 struct scsipi_mode_header header; 1654 struct scsi_blk_desc blk_desc; 1655 u_char sense_data[MAX_PAGE_0_SIZE]; 1656 } scsi_select; 1657 struct scsipi_periph *periph = st->sc_periph; 1658 1659 scsi_select_len = 12 + st->page_0_size; 1660 1661 /* 1662 * This quirk deals with drives that have only one valid mode 1663 * and think this gives them license to reject all mode selects, 1664 * even if the selected mode is the one that is supported. 1665 */ 1666 if (st->quirks & ST_Q_UNIMODAL) { 1667 SC_DEBUG(periph, SCSIPI_DB3, 1668 ("not setting density 0x%x blksize 0x%x\n", 1669 st->density, st->blksize)); 1670 return (0); 1671 } 1672 1673 /* 1674 * Set up for a mode select 1675 */ 1676 bzero(&scsi_select, scsi_select_len); 1677 scsi_select.header.blk_desc_len = sizeof(struct scsi_blk_desc); 1678 scsi_select.header.dev_spec &= ~SMH_DSP_BUFF_MODE; 1679 scsi_select.blk_desc.density = st->density; 1680 if (st->flags & ST_DONTBUFFER) 1681 scsi_select.header.dev_spec |= SMH_DSP_BUFF_MODE_OFF; 1682 else 1683 scsi_select.header.dev_spec |= SMH_DSP_BUFF_MODE_ON; 1684 if (st->flags & ST_FIXEDBLOCKS) 1685 _lto3b(st->blksize, scsi_select.blk_desc.blklen); 1686 if (st->page_0_size) 1687 bcopy(st->sense_data, scsi_select.sense_data, st->page_0_size); 1688 1689 /* 1690 * do the command 1691 */ 1692 return scsipi_mode_select(periph, 0, &scsi_select.header, 1693 scsi_select_len, flags | XS_CTL_DATA_ONSTACK, 1694 ST_RETRIES, ST_CTL_TIME); 1695 } 1696 1697 int 1698 st_cmprss(st, onoff) 1699 struct st_softc *st; 1700 int onoff; 1701 { 1702 u_int scsi_dlen; 1703 int byte2, page; 1704 struct scsi_select { 1705 struct scsipi_mode_header header; 1706 struct scsi_blk_desc blk_desc; 1707 u_char pdata[MAX(sizeof(struct scsi_tape_dev_conf_page), 1708 sizeof(struct scsi_tape_dev_compression_page))]; 1709 } scsi_pdata; 1710 struct scsi_tape_dev_conf_page *ptr; 1711 struct scsi_tape_dev_compression_page *cptr; 1712 struct scsipi_periph *periph = st->sc_periph; 1713 int error, ison, flags = 0; 1714 1715 scsi_dlen = sizeof(scsi_pdata); 1716 1717 /* 1718 * Do DATA COMPRESSION page first. 1719 */ 1720 page = SMS_PAGE_CTRL_CURRENT | 0xf; 1721 byte2 = 0; 1722 1723 /* 1724 * Do the MODE SENSE command... 1725 */ 1726 again: 1727 bzero(&scsi_pdata, scsi_dlen); 1728 error = scsipi_mode_sense(periph, byte2, page, 1729 &scsi_pdata.header, scsi_dlen, flags | XS_CTL_DATA_ONSTACK, 1730 ST_RETRIES, ST_CTL_TIME); 1731 1732 if (error) { 1733 if (byte2 != SMS_DBD) { 1734 byte2 = SMS_DBD; 1735 goto again; 1736 } 1737 /* 1738 * Try a different page? 1739 */ 1740 if (page == (SMS_PAGE_CTRL_CURRENT | 0xf)) { 1741 page = SMS_PAGE_CTRL_CURRENT | 0x10; 1742 byte2 = 0; 1743 goto again; 1744 } 1745 return (error); 1746 } 1747 1748 if (scsi_pdata.header.blk_desc_len) 1749 ptr = (struct scsi_tape_dev_conf_page *) scsi_pdata.pdata; 1750 else 1751 ptr = (struct scsi_tape_dev_conf_page *) &scsi_pdata.blk_desc; 1752 1753 if ((page & SMS_PAGE_CODE) == 0xf) { 1754 cptr = (struct scsi_tape_dev_compression_page *) ptr; 1755 ison = (cptr->dce_dcc & DCP_DCE) != 0; 1756 if (onoff) 1757 cptr->dce_dcc |= DCP_DCE; 1758 else 1759 cptr->dce_dcc &= ~DCP_DCE; 1760 cptr->pagecode &= ~0x80; 1761 } else { 1762 ison = (ptr->sel_comp_alg != 0); 1763 if (onoff) 1764 ptr->sel_comp_alg = 1; 1765 else 1766 ptr->sel_comp_alg = 0; 1767 ptr->pagecode &= ~0x80; 1768 ptr->byte2 = 0; 1769 ptr->active_partition = 0; 1770 ptr->wb_full_ratio = 0; 1771 ptr->rb_empty_ratio = 0; 1772 ptr->byte8 &= ~0x30; 1773 ptr->gap_size = 0; 1774 ptr->byte10 &= ~0xe7; 1775 ptr->ew_bufsize[0] = 0; 1776 ptr->ew_bufsize[1] = 0; 1777 ptr->ew_bufsize[2] = 0; 1778 ptr->reserved = 0; 1779 } 1780 onoff = onoff ? 1 : 0; 1781 /* 1782 * There might be a virtue in actually doing the MODE SELECTS, 1783 * but let's not clog the bus over it. 1784 */ 1785 if (onoff == ison) 1786 return (0); 1787 1788 /* 1789 * Set up for a mode select 1790 */ 1791 1792 scsi_pdata.header.data_length = 0; 1793 scsi_pdata.header.medium_type = 0; 1794 if ((st->flags & ST_DONTBUFFER) == 0) 1795 scsi_pdata.header.dev_spec = SMH_DSP_BUFF_MODE_ON; 1796 else 1797 scsi_pdata.header.dev_spec = 0; 1798 1799 if (scsi_pdata.header.blk_desc_len) { 1800 scsi_pdata.blk_desc.density = 0; 1801 scsi_pdata.blk_desc.nblocks[0] = 0; 1802 scsi_pdata.blk_desc.nblocks[1] = 0; 1803 scsi_pdata.blk_desc.nblocks[2] = 0; 1804 } 1805 1806 /* 1807 * Do the command 1808 */ 1809 error = scsipi_mode_select(periph, SMS_PF, &scsi_pdata.header, 1810 scsi_dlen, flags | XS_CTL_DATA_ONSTACK, ST_RETRIES, ST_CTL_TIME); 1811 1812 if (error && (page & SMS_PAGE_CODE) == 0xf) { 1813 /* 1814 * Try DEVICE CONFIGURATION page. 1815 */ 1816 page = SMS_PAGE_CTRL_CURRENT | 0x10; 1817 goto again; 1818 } 1819 return (error); 1820 } 1821 /* 1822 * issue an erase command 1823 */ 1824 int 1825 st_erase(st, full, flags) 1826 struct st_softc *st; 1827 int full, flags; 1828 { 1829 int tmo; 1830 struct scsi_erase cmd; 1831 1832 /* 1833 * Full erase means set LONG bit in erase command, which asks 1834 * the drive to erase the entire unit. Without this bit, we're 1835 * asking the drive to write an erase gap. 1836 */ 1837 bzero(&cmd, sizeof(cmd)); 1838 cmd.opcode = ERASE; 1839 if (full) { 1840 cmd.byte2 = SE_LONG; 1841 tmo = ST_SPC_TIME; 1842 } else { 1843 tmo = ST_IO_TIME; 1844 } 1845 1846 /* 1847 * XXX We always do this asynchronously, for now, unless the device 1848 * has the ST_Q_ERASE_NOIMM quirk. How long should we wait if we 1849 * want to (eventually) to it synchronously? 1850 */ 1851 if ((st->quirks & ST_Q_ERASE_NOIMM) == 0) 1852 cmd.byte2 |= SE_IMMED; 1853 1854 return (scsipi_command(st->sc_periph, 1855 (struct scsipi_generic *)&cmd, sizeof(cmd), 1856 0, 0, ST_RETRIES, tmo, NULL, flags)); 1857 } 1858 1859 /* 1860 * skip N blocks/filemarks/seq filemarks/eom 1861 */ 1862 int 1863 st_space(st, number, what, flags) 1864 struct st_softc *st; 1865 u_int what; 1866 int flags; 1867 int number; 1868 { 1869 struct scsi_space cmd; 1870 int error; 1871 1872 switch (what) { 1873 case SP_BLKS: 1874 if (st->flags & ST_PER_ACTION) { 1875 if (number > 0) { 1876 st->flags &= ~ST_PER_ACTION; 1877 return (EIO); 1878 } else if (number < 0) { 1879 if (st->flags & ST_AT_FILEMARK) { 1880 /* 1881 * Handling of ST_AT_FILEMARK 1882 * in st_space will fill in the 1883 * right file mark count. 1884 */ 1885 error = st_space(st, 0, SP_FILEMARKS, 1886 flags); 1887 if (error) 1888 return (error); 1889 } 1890 if (st->flags & ST_BLANK_READ) { 1891 st->flags &= ~ST_BLANK_READ; 1892 return (EIO); 1893 } 1894 st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); 1895 } 1896 } 1897 break; 1898 case SP_FILEMARKS: 1899 if (st->flags & ST_EIO_PENDING) { 1900 if (number > 0) { 1901 /* pretend we just discovered the error */ 1902 st->flags &= ~ST_EIO_PENDING; 1903 return (EIO); 1904 } else if (number < 0) { 1905 /* back away from the error */ 1906 st->flags &= ~ST_EIO_PENDING; 1907 } 1908 } 1909 if (st->flags & ST_AT_FILEMARK) { 1910 st->flags &= ~ST_AT_FILEMARK; 1911 number--; 1912 } 1913 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 1914 /* back away from unwritten tape */ 1915 st->flags &= ~ST_BLANK_READ; 1916 number++; /* XXX dubious */ 1917 } 1918 break; 1919 case SP_EOM: 1920 if (st->flags & ST_EOM_PENDING) { 1921 /* we're already there */ 1922 st->flags &= ~ST_EOM_PENDING; 1923 return (0); 1924 } 1925 if (st->flags & ST_EIO_PENDING) { 1926 /* pretend we just discovered the error */ 1927 st->flags &= ~ST_EIO_PENDING; 1928 return (EIO); 1929 } 1930 if (st->flags & ST_AT_FILEMARK) 1931 st->flags &= ~ST_AT_FILEMARK; 1932 break; 1933 } 1934 if (number == 0) 1935 return (0); 1936 1937 bzero(&cmd, sizeof(cmd)); 1938 cmd.opcode = SPACE; 1939 cmd.byte2 = what; 1940 _lto3b(number, cmd.number); 1941 1942 return (scsipi_command(st->sc_periph, 1943 (struct scsipi_generic *)&cmd, sizeof(cmd), 1944 0, 0, 0, ST_SPC_TIME, NULL, flags)); 1945 } 1946 1947 /* 1948 * write N filemarks 1949 */ 1950 int 1951 st_write_filemarks(st, number, flags) 1952 struct st_softc *st; 1953 int flags; 1954 int number; 1955 { 1956 struct scsi_write_filemarks cmd; 1957 1958 /* 1959 * It's hard to write a negative number of file marks. 1960 * Don't try. 1961 */ 1962 if (number < 0) 1963 return (EINVAL); 1964 switch (number) { 1965 case 0: /* really a command to sync the drive's buffers */ 1966 break; 1967 case 1: 1968 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 1969 st->flags &= ~ST_WRITTEN; 1970 else 1971 st->flags |= ST_FM_WRITTEN; 1972 st->flags &= ~ST_PER_ACTION; 1973 break; 1974 default: 1975 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 1976 } 1977 1978 bzero(&cmd, sizeof(cmd)); 1979 cmd.opcode = WRITE_FILEMARKS; 1980 _lto3b(number, cmd.number); 1981 1982 return (scsipi_command(st->sc_periph, 1983 (struct scsipi_generic *)&cmd, sizeof(cmd), 1984 0, 0, 0, ST_IO_TIME * 4, NULL, flags)); 1985 } 1986 1987 /* 1988 * Make sure the right number of file marks is on tape if the 1989 * tape has been written. If the position argument is true, 1990 * leave the tape positioned where it was originally. 1991 * 1992 * nmarks returns the number of marks to skip (or, if position 1993 * true, which were skipped) to get back original position. 1994 */ 1995 int 1996 st_check_eod(st, position, nmarks, flags) 1997 struct st_softc *st; 1998 boolean position; 1999 int *nmarks; 2000 int flags; 2001 { 2002 int error; 2003 2004 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 2005 default: 2006 *nmarks = 0; 2007 return (0); 2008 case ST_WRITTEN: 2009 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 2010 *nmarks = 1; 2011 break; 2012 case ST_WRITTEN | ST_2FM_AT_EOD: 2013 *nmarks = 2; 2014 } 2015 error = st_write_filemarks(st, *nmarks, flags); 2016 if (position && !error) 2017 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 2018 return (error); 2019 } 2020 2021 /* 2022 * load/unload/retension 2023 */ 2024 int 2025 st_load(st, type, flags) 2026 struct st_softc *st; 2027 u_int type; 2028 int flags; 2029 { 2030 int error; 2031 struct scsi_load cmd; 2032 2033 if (type != LD_LOAD) { 2034 int nmarks; 2035 2036 error = st_check_eod(st, FALSE, &nmarks, flags); 2037 if (error) { 2038 printf("%s: failed to write closing filemarks at " 2039 "unload, errno=%d\n", st->sc_dev.dv_xname, error); 2040 return (error); 2041 } 2042 } 2043 if (st->quirks & ST_Q_IGNORE_LOADS) { 2044 if (type == LD_LOAD) { 2045 /* 2046 * If we ignore loads, at least we should try a rewind. 2047 */ 2048 return st_rewind(st, 0, flags); 2049 } 2050 /* otherwise, we should do what's asked of us */ 2051 } 2052 2053 bzero(&cmd, sizeof(cmd)); 2054 cmd.opcode = LOAD; 2055 cmd.how = type; 2056 2057 error = scsipi_command(st->sc_periph, 2058 (struct scsipi_generic *)&cmd, sizeof(cmd), 2059 0, 0, ST_RETRIES, ST_SPC_TIME, NULL, flags); 2060 if (error) { 2061 printf("%s: error %d in st_load (op %d)\n", 2062 st->sc_dev.dv_xname, error, type); 2063 } 2064 return (error); 2065 } 2066 2067 /* 2068 * Rewind the device 2069 */ 2070 int 2071 st_rewind(st, immediate, flags) 2072 struct st_softc *st; 2073 u_int immediate; 2074 int flags; 2075 { 2076 struct scsi_rewind cmd; 2077 int error; 2078 int nmarks; 2079 2080 error = st_check_eod(st, FALSE, &nmarks, flags); 2081 if (error) { 2082 printf("%s: failed to write closing filemarks at " 2083 "rewind, errno=%d\n", st->sc_dev.dv_xname, error); 2084 return (error); 2085 } 2086 st->flags &= ~ST_PER_ACTION; 2087 2088 bzero(&cmd, sizeof(cmd)); 2089 cmd.opcode = REWIND; 2090 cmd.byte2 = immediate; 2091 2092 error = scsipi_command(st->sc_periph, 2093 (struct scsipi_generic *)&cmd, sizeof(cmd), 0, 0, ST_RETRIES, 2094 immediate ? ST_CTL_TIME: ST_SPC_TIME, NULL, flags); 2095 if (error) { 2096 printf("%s: error %d trying to rewind\n", 2097 st->sc_dev.dv_xname, error); 2098 } 2099 return (error); 2100 } 2101 2102 int 2103 st_rdpos(st, hard, blkptr) 2104 struct st_softc *st; 2105 int hard; 2106 u_int32_t *blkptr; 2107 { 2108 int error; 2109 u_int8_t posdata[20]; 2110 struct scsi_tape_read_position cmd; 2111 2112 /* 2113 * First flush any pending writes... 2114 */ 2115 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 2116 2117 /* 2118 * The latter case is for 'write protected' tapes 2119 * which are too stupid to recognize a zero count 2120 * for writing filemarks as a no-op. 2121 */ 2122 if (error != 0 && error != EACCES && error != EROFS) 2123 return (error); 2124 2125 bzero(&cmd, sizeof(cmd)); 2126 bzero(&posdata, sizeof(posdata)); 2127 cmd.opcode = READ_POSITION; 2128 if (hard) 2129 cmd.byte1 = 1; 2130 2131 error = scsipi_command(st->sc_periph, 2132 (struct scsipi_generic *)&cmd, sizeof(cmd), (u_char *)&posdata, 2133 sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, 2134 XS_CTL_SILENT | XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); 2135 2136 if (error == 0) { 2137 #if 0 2138 printf("posdata:"); 2139 for (hard = 0; hard < sizeof(posdata); hard++) 2140 printf("%02x ", posdata[hard] & 0xff); 2141 printf("\n"); 2142 #endif 2143 if (posdata[0] & 0x4) /* Block Position Unknown */ 2144 error = EINVAL; 2145 else 2146 *blkptr = _4btol(&posdata[4]); 2147 } 2148 return (error); 2149 } 2150 2151 int 2152 st_setpos(st, hard, blkptr) 2153 struct st_softc *st; 2154 int hard; 2155 u_int32_t *blkptr; 2156 { 2157 int error; 2158 struct scsi_tape_locate cmd; 2159 2160 /* 2161 * First flush any pending writes. Strictly speaking, 2162 * we're not supposed to have to worry about this, 2163 * but let's be untrusting. 2164 */ 2165 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 2166 2167 /* 2168 * The latter case is for 'write protected' tapes 2169 * which are too stupid to recognize a zero count 2170 * for writing filemarks as a no-op. 2171 */ 2172 if (error != 0 && error != EACCES && error != EROFS) 2173 return (error); 2174 2175 bzero(&cmd, sizeof(cmd)); 2176 cmd.opcode = LOCATE; 2177 if (hard) 2178 cmd.byte2 = 1 << 2; 2179 _lto4b(*blkptr, cmd.blkaddr); 2180 error = scsipi_command(st->sc_periph, 2181 (struct scsipi_generic *)&cmd, sizeof(cmd), 2182 NULL, 0, ST_RETRIES, ST_SPC_TIME, NULL, 0); 2183 /* 2184 * XXX: Note file && block number position now unknown (if 2185 * XXX: these things ever start being maintained in this driver) 2186 */ 2187 return (error); 2188 } 2189 2190 2191 /* 2192 * Look at the returned sense and act on the error and determine 2193 * the unix error number to pass back..., 0 (== report no error), 2194 * -1 = retry the operation, -2 continue error processing. 2195 */ 2196 int 2197 st_interpret_sense(xs) 2198 struct scsipi_xfer *xs; 2199 { 2200 struct scsipi_periph *periph = xs->xs_periph; 2201 struct scsipi_sense_data *sense = &xs->sense.scsi_sense; 2202 struct buf *bp = xs->bp; 2203 struct st_softc *st = (void *)periph->periph_dev; 2204 int retval = EJUSTRETURN; 2205 int doprint = ((xs->xs_control & XS_CTL_SILENT) == 0); 2206 u_int8_t key; 2207 int32_t info; 2208 2209 /* 2210 * If it isn't a extended or extended/deferred error, let 2211 * the generic code handle it. 2212 */ 2213 if ((sense->error_code & SSD_ERRCODE) != 0x70 && 2214 (sense->error_code & SSD_ERRCODE) != 0x71) { /* DEFFERRED */ 2215 return (retval); 2216 } 2217 2218 if (sense->error_code & SSD_ERRCODE_VALID) 2219 info = _4btol(sense->info); 2220 else 2221 info = xs->datalen; /* bad choice if fixed blocks */ 2222 key = sense->flags & SSD_KEY; 2223 st->mt_erreg = key; 2224 st->asc = sense->add_sense_code; 2225 st->ascq = sense->add_sense_code_qual; 2226 st->mt_resid = (short) info; 2227 2228 /* 2229 * If the device is not open yet, let generic handle 2230 */ 2231 if ((periph->periph_flags & PERIPH_OPEN) == 0) { 2232 return (retval); 2233 } 2234 2235 2236 if (st->flags & ST_FIXEDBLOCKS) { 2237 xs->resid = info * st->blksize; 2238 if (sense->flags & SSD_EOM) { 2239 if ((st->flags & ST_EARLYWARN) == 0) 2240 st->flags |= ST_EIO_PENDING; 2241 st->flags |= ST_EOM_PENDING; 2242 if (bp) 2243 bp->b_resid = xs->resid; 2244 } 2245 if (sense->flags & SSD_FILEMARK) { 2246 st->flags |= ST_AT_FILEMARK; 2247 if (bp) 2248 bp->b_resid = xs->resid; 2249 } 2250 if (sense->flags & SSD_ILI) { 2251 st->flags |= ST_EIO_PENDING; 2252 if (bp) 2253 bp->b_resid = xs->resid; 2254 if (sense->error_code & SSD_ERRCODE_VALID && 2255 (xs->xs_control & XS_CTL_SILENT) == 0) 2256 printf("%s: block wrong size, %d blocks " 2257 "residual\n", st->sc_dev.dv_xname, info); 2258 2259 /* 2260 * This quirk code helps the drive read 2261 * the first tape block, regardless of 2262 * format. That is required for these 2263 * drives to return proper MODE SENSE 2264 * information. 2265 */ 2266 if ((st->quirks & ST_Q_SENSE_HELP) && 2267 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 2268 st->blksize -= 512; 2269 } 2270 /* 2271 * If data wanted and no data was tranfered, do it immediatly 2272 */ 2273 if (xs->datalen && xs->resid >= xs->datalen) { 2274 if (st->flags & ST_EIO_PENDING) 2275 return (EIO); 2276 if (st->flags & ST_AT_FILEMARK) { 2277 if (bp) 2278 bp->b_resid = xs->resid; 2279 return (0); 2280 } 2281 } 2282 } else { /* must be variable mode */ 2283 if (sense->flags & SSD_EOM) { 2284 /* 2285 * The current semantics of this 2286 * driver requires EOM detection 2287 * to return EIO unless early 2288 * warning detection is enabled 2289 * for variable mode (this is always 2290 * on for fixed block mode). 2291 */ 2292 if (st->flags & ST_EARLYWARN) { 2293 st->flags |= ST_EOM_PENDING; 2294 retval = 0; 2295 } else { 2296 retval = EIO; 2297 } 2298 2299 /* 2300 * If it's an unadorned EOM detection, 2301 * suppress printing an error. 2302 */ 2303 if (key == SKEY_NO_SENSE) { 2304 doprint = 0; 2305 } 2306 } else if (sense->flags & SSD_FILEMARK) { 2307 retval = 0; 2308 } else if (sense->flags & SSD_ILI) { 2309 if (info < 0) { 2310 /* 2311 * The tape record was bigger than the read 2312 * we issued. 2313 */ 2314 if ((xs->xs_control & XS_CTL_SILENT) == 0) { 2315 printf("%s: %d-byte tape record too big" 2316 " for %d-byte user buffer\n", 2317 st->sc_dev.dv_xname, 2318 xs->datalen - info, xs->datalen); 2319 } 2320 retval = EIO; 2321 } else { 2322 retval = 0; 2323 } 2324 } 2325 xs->resid = info; 2326 if (bp) 2327 bp->b_resid = info; 2328 } 2329 2330 #ifndef SCSIPI_DEBUG 2331 if (retval == 0 && key == SKEY_NO_SENSE) 2332 doprint = 0; 2333 #endif 2334 if (key == SKEY_BLANK_CHECK) { 2335 /* 2336 * This quirk code helps the drive read the 2337 * first tape block, regardless of format. That 2338 * is required for these drives to return proper 2339 * MODE SENSE information. 2340 */ 2341 if ((st->quirks & ST_Q_SENSE_HELP) && 2342 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 2343 /* still starting */ 2344 st->blksize -= 512; 2345 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 2346 st->flags |= ST_BLANK_READ; 2347 xs->resid = xs->datalen; 2348 if (bp) { 2349 bp->b_resid = xs->resid; 2350 /* return an EOF */ 2351 } 2352 retval = 0; 2353 } 2354 } 2355 2356 /* 2357 * If generic sense processing will continue, we should not 2358 * print sense info here. 2359 */ 2360 if (retval == EJUSTRETURN) 2361 doprint = 0; 2362 2363 if (doprint) { 2364 #ifdef SCSIVERBOSE 2365 scsipi_print_sense(xs, 0); 2366 #else 2367 scsipi_printaddr(periph); 2368 printf("Sense Key 0x%02x", key); 2369 if ((sense->error_code & SSD_ERRCODE_VALID) != 0) { 2370 switch (key) { 2371 case SKEY_NOT_READY: 2372 case SKEY_ILLEGAL_REQUEST: 2373 case SKEY_UNIT_ATTENTION: 2374 case SKEY_WRITE_PROTECT: 2375 break; 2376 case SKEY_BLANK_CHECK: 2377 printf(", requested size: %d (decimal)", info); 2378 break; 2379 case SKEY_ABORTED_COMMAND: 2380 if (xs->xs_retries) 2381 printf(", retrying"); 2382 printf(", cmd 0x%x, info 0x%x", 2383 xs->cmd->opcode, info); 2384 break; 2385 default: 2386 printf(", info = %d (decimal)", info); 2387 } 2388 } 2389 if (sense->extra_len != 0) { 2390 int n; 2391 printf(", data ="); 2392 for (n = 0; n < sense->extra_len; n++) 2393 printf(" %02x", sense->cmd_spec_info[n]); 2394 } 2395 printf("\n"); 2396 #endif 2397 } 2398 return (retval); 2399 } 2400 2401 /* 2402 * The quirk here is that the drive returns some value to st_mode_sense 2403 * incorrectly until the tape has actually passed by the head. 2404 * 2405 * The method is to set the drive to large fixed-block state (user-specified 2406 * density and 1024-byte blocks), then read and rewind to get it to sense the 2407 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 2408 * work, as a last resort, try variable- length blocks. The result will be 2409 * the ability to do an accurate st_mode_sense. 2410 * 2411 * We know we can do a rewind because we just did a load, which implies rewind. 2412 * Rewind seems preferable to space backward if we have a virgin tape. 2413 * 2414 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 2415 * error processing, both part of st_interpret_sense. 2416 */ 2417 int 2418 st_touch_tape(st) 2419 struct st_softc *st; 2420 { 2421 char *buf; 2422 int readsize; 2423 int error; 2424 2425 buf = malloc(1024, M_TEMP, M_NOWAIT); 2426 if (buf == NULL) 2427 return (ENOMEM); 2428 2429 if ((error = st_mode_sense(st, 0)) != 0) 2430 goto bad; 2431 2432 /* 2433 * If the block size is already known from the 2434 * sense data, use it. Else start probing at 1024. 2435 */ 2436 if (st->media_blksize > 0) 2437 st->blksize = st->media_blksize; 2438 else 2439 st->blksize = 1024; 2440 2441 do { 2442 switch (st->blksize) { 2443 case 512: 2444 case 1024: 2445 readsize = st->blksize; 2446 st->flags |= ST_FIXEDBLOCKS; 2447 break; 2448 default: 2449 readsize = 1; 2450 st->flags &= ~ST_FIXEDBLOCKS; 2451 } 2452 if ((error = st_mode_select(st, XS_CTL_SILENT)) != 0) { 2453 /* 2454 * The device did not agree with the proposed 2455 * block size. If we exhausted our options, 2456 * return failure, else try another. 2457 */ 2458 if (readsize == 1) 2459 goto bad; 2460 st->blksize -= 512; 2461 continue; 2462 } 2463 st_read(st, buf, readsize, XS_CTL_SILENT); /* XXX */ 2464 if ((error = st_rewind(st, 0, 0)) != 0) { 2465 bad: free(buf, M_TEMP); 2466 return (error); 2467 } 2468 } while (readsize != 1 && readsize > st->blksize); 2469 2470 free(buf, M_TEMP); 2471 return (0); 2472 } 2473 2474 int 2475 stdump(dev, blkno, va, size) 2476 dev_t dev; 2477 daddr_t blkno; 2478 caddr_t va; 2479 size_t size; 2480 { 2481 2482 /* Not implemented. */ 2483 return (ENXIO); 2484 } 2485