st.c revision 1.143.2.1
1 /* $NetBSD: st.c,v 1.143.2.1 2001/09/07 04:45:32 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Charles M. Hannum. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Originally written by Julian Elischer (julian (at) 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 (at) tfs.com) Sept 1992 54 * major changes by Julian Elischer (julian (at) jules.dialix.oz.au) May 1993 55 * 56 * A lot of rewhacking done by mjacob (mjacob (at) 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 #include <sys/vnode.h> 76 #if NRND > 0 77 #include <sys/rnd.h> 78 #endif 79 80 #include <miscfs/specfs/specdev.h> 81 82 #include <dev/scsipi/scsi_all.h> 83 #include <dev/scsipi/scsi_tape.h> 84 #include <dev/scsipi/stvar.h> 85 86 /* Defines for device specific stuff */ 87 #define DEF_FIXED_BSIZE 512 88 89 #define STMODE(z) ( minor(z) & 0x03) 90 #define STDSTY(z) ((minor(z) >> 2) & 0x03) 91 #define STUNIT(z) ((minor(z) >> 4) ) 92 93 #define NORMAL_MODE 0 94 #define NOREW_MODE 1 95 #define EJECT_MODE 2 96 #define CTRL_MODE 3 97 98 #define FALSE 0 99 #define TRUE 1 100 101 #ifndef ST_MOUNT_DELAY 102 #define ST_MOUNT_DELAY 0 103 #endif 104 105 /* 106 * Define various devices that we know mis-behave in some way, 107 * and note how they are bad, so we can correct for them 108 */ 109 110 const struct st_quirk_inquiry_pattern st_quirk_patterns[] = { 111 {{T_SEQUENTIAL, T_REMOV, 112 " ", " ", " "}, {0, 0, { 113 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 114 {ST_Q_FORCE_BLKSIZE, 512, QIC_24}, /* minor 4-7 */ 115 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_1600}, /* minor 8-11 */ 116 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_6250} /* minor 12-15 */ 117 }}}, 118 {{T_SEQUENTIAL, T_REMOV, 119 "TANDBERG", " TDC 3600 ", ""}, {0, 12, { 120 {0, 0, 0}, /* minor 0-3 */ 121 {ST_Q_FORCE_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 122 {0, 0, QIC_150}, /* minor 8-11 */ 123 {0, 0, QIC_120} /* minor 12-15 */ 124 }}}, 125 {{T_SEQUENTIAL, T_REMOV, 126 "TANDBERG", " TDC 3800 ", ""}, {0, 0, { 127 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 128 {0, 0, QIC_525}, /* minor 4-7 */ 129 {0, 0, QIC_150}, /* minor 8-11 */ 130 {0, 0, QIC_120} /* minor 12-15 */ 131 }}}, 132 /* 133 * lacking a manual for the 4200, it's not clear what the 134 * specific density codes should be- the device is a 2.5GB 135 * capable QIC drive, those density codes aren't readily 136 * availabel. The 'default' will just have to do. 137 */ 138 {{T_SEQUENTIAL, T_REMOV, 139 "TANDBERG", " TDC 4200 ", ""}, {0, 0, { 140 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 141 {0, 0, QIC_525}, /* minor 4-7 */ 142 {0, 0, QIC_150}, /* minor 8-11 */ 143 {0, 0, QIC_120} /* minor 12-15 */ 144 }}}, 145 /* 146 * At least -005 and -007 need this. I'll assume they all do unless I 147 * hear otherwise. - mycroft, 31MAR1994 148 */ 149 {{T_SEQUENTIAL, T_REMOV, 150 "ARCHIVE ", "VIPER 2525 25462", ""}, {0, 0, { 151 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 152 {ST_Q_SENSE_HELP, 0, QIC_525}, /* minor 4-7 */ 153 {0, 0, QIC_150}, /* minor 8-11 */ 154 {0, 0, QIC_120} /* minor 12-15 */ 155 }}}, 156 /* 157 * One user reports that this works for his tape drive. It probably 158 * needs more work. - mycroft, 09APR1994 159 */ 160 {{T_SEQUENTIAL, T_REMOV, 161 "SANKYO ", "CP525 ", ""}, {0, 0, { 162 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 163 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 164 {0, 0, QIC_150}, /* minor 8-11 */ 165 {0, 0, QIC_120} /* minor 12-15 */ 166 }}}, 167 {{T_SEQUENTIAL, T_REMOV, 168 "ANRITSU ", "DMT780 ", ""}, {0, 0, { 169 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 170 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 171 {0, 0, QIC_150}, /* minor 8-11 */ 172 {0, 0, QIC_120} /* minor 12-15 */ 173 }}}, 174 {{T_SEQUENTIAL, T_REMOV, 175 "ARCHIVE ", "VIPER 150 21247", ""}, {ST_Q_ERASE_NOIMM, 12, { 176 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 177 {0, 0, QIC_150}, /* minor 4-7 */ 178 {0, 0, QIC_120}, /* minor 8-11 */ 179 {0, 0, QIC_24} /* minor 12-15 */ 180 }}}, 181 {{T_SEQUENTIAL, T_REMOV, 182 "ARCHIVE ", "VIPER 150 21531", ""}, {ST_Q_ERASE_NOIMM, 12, { 183 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 184 {0, 0, QIC_150}, /* minor 4-7 */ 185 {0, 0, QIC_120}, /* minor 8-11 */ 186 {0, 0, QIC_24} /* minor 12-15 */ 187 }}}, 188 {{T_SEQUENTIAL, T_REMOV, 189 "WANGTEK ", "5099ES SCSI", ""}, {0, 0, { 190 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 191 {0, 0, QIC_11}, /* minor 4-7 */ 192 {0, 0, QIC_24}, /* minor 8-11 */ 193 {0, 0, QIC_24} /* minor 12-15 */ 194 }}}, 195 {{T_SEQUENTIAL, T_REMOV, 196 "WANGTEK ", "5150ES SCSI", ""}, {0, 0, { 197 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 198 {0, 0, QIC_24}, /* minor 4-7 */ 199 {0, 0, QIC_120}, /* minor 8-11 */ 200 {0, 0, QIC_150} /* minor 12-15 */ 201 }}}, 202 {{T_SEQUENTIAL, T_REMOV, 203 "WANGTEK ", "5525ES SCSI REV7", ""}, {0, 0, { 204 {0, 0, 0}, /* minor 0-3 */ 205 {ST_Q_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 206 {0, 0, QIC_150}, /* minor 8-11 */ 207 {0, 0, QIC_120} /* minor 12-15 */ 208 }}}, 209 {{T_SEQUENTIAL, T_REMOV, 210 "WangDAT ", "Model 1300 ", ""}, {0, 0, { 211 {0, 0, 0}, /* minor 0-3 */ 212 {ST_Q_FORCE_BLKSIZE, 512, DDS}, /* minor 4-7 */ 213 {ST_Q_FORCE_BLKSIZE, 1024, DDS}, /* minor 8-11 */ 214 {ST_Q_FORCE_BLKSIZE, 0, DDS} /* minor 12-15 */ 215 }}}, 216 {{T_SEQUENTIAL, T_REMOV, 217 "EXABYTE ", "EXB-8200 ", "263H"}, {0, 5, { 218 {0, 0, 0}, /* minor 0-3 */ 219 {0, 0, 0}, /* minor 4-7 */ 220 {0, 0, 0}, /* minor 8-11 */ 221 {0, 0, 0} /* minor 12-15 */ 222 }}}, 223 {{T_SEQUENTIAL, T_REMOV, 224 "STK", "9490", ""}, 225 {ST_Q_FORCE_BLKSIZE, 0, { 226 {0, 0, 0}, /* minor 0-3 */ 227 {0, 0, 0}, /* minor 4-7 */ 228 {0, 0, 0}, /* minor 8-11 */ 229 {0, 0, 0} /* minor 12-15 */ 230 }}}, 231 {{T_SEQUENTIAL, T_REMOV, 232 "STK", "SD-3", ""}, 233 {ST_Q_FORCE_BLKSIZE, 0, { 234 {0, 0, 0}, /* minor 0-3 */ 235 {0, 0, 0}, /* minor 4-7 */ 236 {0, 0, 0}, /* minor 8-11 */ 237 {0, 0, 0} /* minor 12-15 */ 238 }}}, 239 {{T_SEQUENTIAL, T_REMOV, 240 "IBM", "03590", ""}, {ST_Q_IGNORE_LOADS, 0, { 241 {0, 0, 0}, /* minor 0-3 */ 242 {0, 0, 0}, /* minor 4-7 */ 243 {0, 0, 0}, /* minor 8-11 */ 244 {0, 0, 0} /* minor 12-15 */ 245 }}}, 246 {{T_SEQUENTIAL, T_REMOV, 247 "HP ", "T4000s ", ""}, {ST_Q_UNIMODAL, 0, { 248 {0, 0, QIC_3095}, /* minor 0-3 */ 249 {0, 0, QIC_3095}, /* minor 4-7 */ 250 {0, 0, QIC_3095}, /* minor 8-11 */ 251 {0, 0, QIC_3095}, /* minor 12-15 */ 252 }}}, 253 #if 0 254 {{T_SEQUENTIAL, T_REMOV, 255 "EXABYTE ", "EXB-8200 ", ""}, {0, 12, { 256 {0, 0, 0}, /* minor 0-3 */ 257 {0, 0, 0}, /* minor 4-7 */ 258 {0, 0, 0}, /* minor 8-11 */ 259 {0, 0, 0} /* minor 12-15 */ 260 }}}, 261 #endif 262 {{T_SEQUENTIAL, T_REMOV, 263 "TEAC ", "MT-2ST/N50 ", ""}, {ST_Q_IGNORE_LOADS, 0, { 264 {0, 0, 0}, /* minor 0-3 */ 265 {0, 0, 0}, /* minor 4-7 */ 266 {0, 0, 0}, /* minor 8-11 */ 267 {0, 0, 0} /* minor 12-15 */ 268 }}}, 269 {{T_SEQUENTIAL, T_REMOV, 270 "OnStream", "ADR50 Drive", ""}, {ST_Q_UNIMODAL, 0, { 271 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 272 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 4-7 */ 273 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 8-11 */ 274 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 12-15 */ 275 }}}, 276 {{T_SEQUENTIAL, T_REMOV, 277 "NCR H621", "0-STD-03-46F880 ", ""}, {ST_Q_NOPREVENT, 0, { 278 {0, 0, 0}, /* minor 0-3 */ 279 {0, 0, 0}, /* minor 4-7 */ 280 {0, 0, 0}, /* minor 8-11 */ 281 {0, 0, 0} /* minor 12-15 */ 282 }}}, 283 {{T_SEQUENTIAL, T_REMOV, 284 "OnStream DI-30", "", "1.0"}, {ST_Q_IGNORE_LOADS, 0, { 285 {0, 0, 0}, /* minor 0-3 */ 286 {0, 0, 0}, /* minor 4-7 */ 287 {0, 0, 0}, /* minor 8-11 */ 288 {0, 0, 0} /* minor 12-15 */ 289 }}}, 290 }; 291 292 #define NOEJECT 0 293 #define EJECT 1 294 295 void st_identify_drive __P((struct st_softc *, 296 struct scsipi_inquiry_pattern *)); 297 void st_loadquirks __P((struct st_softc *)); 298 int st_mount_tape __P((struct vnode *, int)); 299 void st_unmount __P((struct st_softc *, boolean)); 300 int st_decide_mode __P((struct st_softc *, boolean)); 301 void ststart __P((struct scsipi_periph *)); 302 void stdone __P((struct scsipi_xfer *)); 303 int st_read __P((struct st_softc *, char *, int, int)); 304 int st_space __P((struct st_softc *, int, u_int, int)); 305 int st_write_filemarks __P((struct st_softc *, int, int)); 306 int st_check_eod __P((struct st_softc *, boolean, int *, int)); 307 int st_load __P((struct st_softc *, u_int, int)); 308 int st_rewind __P((struct st_softc *, u_int, int)); 309 int st_interpret_sense __P((struct scsipi_xfer *)); 310 int st_touch_tape __P((struct st_softc *)); 311 int st_erase __P((struct st_softc *, int full, int flags)); 312 int st_rdpos __P((struct st_softc *, int, u_int32_t *)); 313 int st_setpos __P((struct st_softc *, int, u_int32_t *)); 314 315 const struct scsipi_periphsw st_switch = { 316 st_interpret_sense, 317 ststart, 318 NULL, 319 stdone 320 }; 321 322 #if defined(ST_ENABLE_EARLYWARN) 323 #define ST_INIT_FLAGS ST_EARLYWARN 324 #else 325 #define ST_INIT_FLAGS 0 326 #endif 327 328 /* 329 * The routine called by the low level scsi routine when it discovers 330 * A device suitable for this driver 331 */ 332 void 333 stattach(parent, st, aux) 334 struct device *parent; 335 struct st_softc *st; 336 void *aux; 337 { 338 struct scsipibus_attach_args *sa = aux; 339 struct scsipi_periph *periph = sa->sa_periph; 340 341 SC_DEBUG(periph, SCSIPI_DB2, ("stattach: ")); 342 343 /* 344 * Store information needed to contact our base driver 345 */ 346 st->sc_periph = periph; 347 periph->periph_dev = &st->sc_dev; 348 periph->periph_switch = &st_switch; 349 350 /* 351 * Set initial flags 352 */ 353 354 st->flags = ST_INIT_FLAGS; 355 356 /* 357 * Check if the drive is a known criminal and take 358 * Any steps needed to bring it into line 359 */ 360 st_identify_drive(st, &sa->sa_inqbuf); 361 /* 362 * Use the subdriver to request information regarding the drive. 363 */ 364 printf("\n"); 365 printf("%s: %s", st->sc_dev.dv_xname, st->quirkdata ? "rogue, " : ""); 366 if (scsipi_test_unit_ready(periph, 367 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE) || 368 st->ops(st, ST_OPS_MODESENSE, 369 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE)) 370 printf("drive empty\n"); 371 else { 372 printf("density code %d, ", st->media_density); 373 if (st->media_blksize > 0) 374 printf("%d-byte", st->media_blksize); 375 else 376 printf("variable"); 377 printf(" blocks, write-%s\n", 378 (st->flags & ST_READONLY) ? "protected" : "enabled"); 379 } 380 381 /* 382 * Set up the buf queue for this device 383 */ 384 BUFQ_INIT(&st->buf_queue); 385 386 #if NRND > 0 387 rnd_attach_source(&st->rnd_source, st->sc_dev.dv_xname, 388 RND_TYPE_TAPE, 0); 389 #endif 390 } 391 392 /* 393 * Use the inquiry routine in 'scsi_base' to get drive info so we can 394 * Further tailor our behaviour. 395 */ 396 void 397 st_identify_drive(st, inqbuf) 398 struct st_softc *st; 399 struct scsipi_inquiry_pattern *inqbuf; 400 { 401 struct st_quirk_inquiry_pattern *finger; 402 int priority; 403 404 finger = (struct st_quirk_inquiry_pattern *)scsipi_inqmatch(inqbuf, 405 (caddr_t)st_quirk_patterns, 406 sizeof(st_quirk_patterns) / sizeof(st_quirk_patterns[0]), 407 sizeof(st_quirk_patterns[0]), &priority); 408 if (priority != 0) { 409 st->quirkdata = &finger->quirkdata; 410 st->drive_quirks = finger->quirkdata.quirks; 411 st->quirks = finger->quirkdata.quirks; /* start value */ 412 st->page_0_size = finger->quirkdata.page_0_size; 413 st_loadquirks(st); 414 } 415 } 416 417 /* 418 * initialise the subdevices to the default (QUIRK) state. 419 * this will remove any setting made by the system operator or previous 420 * operations. 421 */ 422 void 423 st_loadquirks(st) 424 struct st_softc *st; 425 { 426 int i; 427 struct modes *mode; 428 struct modes *mode2; 429 430 mode = st->quirkdata->modes; 431 mode2 = st->modes; 432 for (i = 0; i < 4; i++) { 433 memset(mode2, 0, sizeof(struct modes)); 434 st->modeflags[i] &= ~(BLKSIZE_SET_BY_QUIRK | 435 DENSITY_SET_BY_QUIRK | BLKSIZE_SET_BY_USER | 436 DENSITY_SET_BY_USER); 437 if ((mode->quirks | st->drive_quirks) & ST_Q_FORCE_BLKSIZE) { 438 mode2->blksize = mode->blksize; 439 st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; 440 } 441 if (mode->density) { 442 mode2->density = mode->density; 443 st->modeflags[i] |= DENSITY_SET_BY_QUIRK; 444 } 445 mode2->quirks |= mode->quirks; 446 mode++; 447 mode2++; 448 } 449 } 450 451 /* 452 * open the device. 453 */ 454 int 455 stopen(devvp, flags, mode, p) 456 struct vnode *devvp; 457 int flags; 458 int mode; 459 struct proc *p; 460 { 461 u_int stmode, dsty; 462 int error, sflags, unit, tries, ntries; 463 struct st_softc *st; 464 struct scsipi_periph *periph; 465 struct scsipi_adapter *adapt; 466 467 unit = STUNIT(devvp->v_rdev); 468 if (unit >= st_cd.cd_ndevs) 469 return (ENXIO); 470 st = st_cd.cd_devs[unit]; 471 if (st == NULL) 472 return (ENXIO); 473 474 stmode = STMODE(devvp->v_rdev); 475 dsty = STDSTY(devvp->v_rdev); 476 477 periph = st->sc_periph; 478 adapt = periph->periph_channel->chan_adapter; 479 480 SC_DEBUG(periph, SCSIPI_DB1, ("open: dev=0x%x (unit %d (of %d))\n", 481 devvp->v_rdev, unit, st_cd.cd_ndevs)); 482 483 devvp->v_devcookie = st; 484 485 /* 486 * Only allow one at a time 487 */ 488 if (periph->periph_flags & PERIPH_OPEN) { 489 printf("%s: already open\n", st->sc_dev.dv_xname); 490 return (EBUSY); 491 } 492 493 if ((error = scsipi_adapter_addref(adapt)) != 0) 494 return (error); 495 496 /* 497 * clear any latched errors. 498 */ 499 st->mt_resid = 0; 500 st->mt_erreg = 0; 501 st->asc = 0; 502 st->ascq = 0; 503 504 /* 505 * Catch any unit attention errors. Be silent about this 506 * unless we're already mounted. We ignore media change 507 * if we're in control mode or not mounted yet. 508 */ 509 if ((st->flags & ST_MOUNTED) == 0 || stmode == CTRL_MODE) { 510 #ifdef SCSIDEBUG 511 sflags = XS_CTL_IGNORE_MEDIA_CHANGE; 512 #else 513 sflags = XS_CTL_SILENT|XS_CTL_IGNORE_MEDIA_CHANGE; 514 #endif 515 } else 516 sflags = 0; 517 518 /* 519 * If we're already mounted or we aren't configured for 520 * a mount delay, only try a test unit ready once. Otherwise, 521 * try up to ST_MOUNT_DELAY times with a rest interval of 522 * one second between each try. 523 */ 524 525 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0) { 526 ntries = 1; 527 } else { 528 ntries = ST_MOUNT_DELAY; 529 } 530 531 for (error = tries = 0; tries < ntries; tries++) { 532 int slpintr, oflags; 533 534 /* 535 * If we had no error, or we're opening the control mode 536 * device, we jump out right away. 537 */ 538 539 error = scsipi_test_unit_ready(periph, sflags); 540 if (error == 0 || stmode == CTRL_MODE) { 541 break; 542 } 543 544 /* 545 * We had an error. 546 * 547 * If we're already mounted or we aren't configured for 548 * a mount delay, or the error isn't a NOT READY error, 549 * skip to the error exit now. 550 */ 551 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0 || 552 (st->mt_key != SKEY_NOT_READY)) { 553 goto bad; 554 } 555 556 /* 557 * clear any latched errors. 558 */ 559 st->mt_resid = 0; 560 st->mt_erreg = 0; 561 st->asc = 0; 562 st->ascq = 0; 563 564 /* 565 * Fake that we have the device open so 566 * we block other apps from getting in. 567 */ 568 569 oflags = periph->periph_flags; 570 periph->periph_flags |= PERIPH_OPEN; 571 572 slpintr = tsleep(&lbolt, PUSER|PCATCH, "stload", 0); 573 574 periph->periph_flags = oflags; /* restore flags */ 575 if (slpintr) { 576 goto bad; 577 } 578 } 579 580 581 /* 582 * If the mode is 3 (e.g. minor = 3,7,11,15) then the device has 583 * been opened to set defaults and perform other, usually non-I/O 584 * related, operations. In this case, do a quick check to see 585 * whether the unit actually had a tape loaded (this will be known 586 * as to whether or not we got a NOT READY for the above 587 * unit attention). If a tape is there, go do a mount sequence. 588 */ 589 if (stmode == CTRL_MODE && st->mt_key == SKEY_NOT_READY) { 590 periph->periph_flags |= PERIPH_OPEN; 591 return (0); 592 } 593 594 /* 595 * If we get this far and had an error set, that means we failed 596 * to pass the 'test unit ready' test for the non-controlmode device, 597 * so we bounce the open. 598 */ 599 600 if (error) 601 return (error); 602 603 /* 604 * Else, we're now committed to saying we're open. 605 */ 606 607 periph->periph_flags |= PERIPH_OPEN; /* unit attn are now errors */ 608 609 /* 610 * If it's a different mode, or if the media has been 611 * invalidated, unmount the tape from the previous 612 * session but continue with open processing 613 */ 614 if (st->last_dsty != dsty || 615 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 616 st_unmount(st, NOEJECT); 617 618 /* 619 * If we are not mounted, then we should start a new 620 * mount session. 621 */ 622 if (!(st->flags & ST_MOUNTED)) { 623 if ((error = st_mount_tape(devvp, flags)) != 0) 624 goto bad; 625 st->last_dsty = dsty; 626 } 627 628 SC_DEBUG(periph, SCSIPI_DB2, ("open complete\n")); 629 return (0); 630 631 bad: 632 st_unmount(st, NOEJECT); 633 scsipi_adapter_delref(adapt); 634 periph->periph_flags &= ~PERIPH_OPEN; 635 return (error); 636 } 637 638 /* 639 * close the device.. only called if we are the LAST 640 * occurence of an open device 641 */ 642 int 643 stclose(devvp, flags, mode, p) 644 struct vnode *devvp; 645 int flags; 646 int mode; 647 struct proc *p; 648 { 649 int stxx, error = 0; 650 struct st_softc *st = devvp->v_devcookie; 651 struct scsipi_periph *periph = st->sc_periph; 652 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 653 654 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("closing\n")); 655 656 /* 657 * Make sure that a tape opened in write-only mode will have 658 * file marks written on it when closed, even if not written to. 659 * 660 * This is for SUN compatibility. Actually, the Sun way of 661 * things is to: 662 * 663 * only write filemarks if there are fmks to be written and 664 * - open for write (possibly read/write) 665 * - the last operation was a write 666 * or: 667 * - opened for wronly 668 * - no data was written (including filemarks) 669 */ 670 671 stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); 672 if (((flags & FWRITE) && stxx == ST_WRITTEN) || 673 ((flags & O_ACCMODE) == FWRITE && stxx == 0)) { 674 int nm; 675 error = st_check_eod(st, FALSE, &nm, 0); 676 } 677 678 switch (STMODE(devvp->v_rdev)) { 679 case NORMAL_MODE: 680 st_unmount(st, NOEJECT); 681 break; 682 case NOREW_MODE: 683 case CTRL_MODE: 684 /* 685 * Leave mounted unless media seems to have been removed. 686 * 687 * Otherwise, if we're to terminate a tape with more than one 688 * filemark [ and because we're not rewinding here ], backspace 689 * one filemark so that later appends will see an unbroken 690 * sequence of: 691 * 692 * file - FMK - file - FMK ... file - FMK FMK (EOM) 693 */ 694 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 695 st_unmount(st, NOEJECT); 696 } else if (error == 0) { 697 /* 698 * ST_WRITTEN was preserved from above. 699 * 700 * All we need to know here is: 701 * 702 * Were we writing this tape and was the last 703 * operation a write? 704 * 705 * Are there supposed to be 2FM at EOD? 706 * 707 * If both statements are true, then we backspace 708 * one filemark. 709 */ 710 stxx |= (st->flags & ST_2FM_AT_EOD); 711 if ((flags & FWRITE) != 0 && 712 (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { 713 error = st_space(st, -1, SP_FILEMARKS, 0); 714 } 715 } 716 break; 717 case EJECT_MODE: 718 st_unmount(st, EJECT); 719 break; 720 } 721 722 scsipi_wait_drain(periph); 723 724 scsipi_adapter_delref(adapt); 725 periph->periph_flags &= ~PERIPH_OPEN; 726 727 return (error); 728 } 729 730 /* 731 * Start a new mount session. 732 * Copy in all the default parameters from the selected device mode. 733 * and try guess any that seem to be defaulted. 734 */ 735 int 736 st_mount_tape(devvp, flags) 737 struct vnode *devvp; 738 int flags; 739 { 740 /* int unit; */ 741 u_int dsty; 742 struct st_softc *st = devvp->v_devcookie; 743 struct scsipi_periph *periph; 744 int error = 0; 745 746 /* unit = STUNIT(devvp->v_rdev); */ 747 dsty = STDSTY(devvp->v_rdev); 748 periph = st->sc_periph; 749 750 if (st->flags & ST_MOUNTED) 751 return (0); 752 753 SC_DEBUG(periph, SCSIPI_DB1, ("mounting\n ")); 754 st->flags |= ST_NEW_MOUNT; 755 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 756 /* 757 * If the media is new, then make sure we give it a chance to 758 * to do a 'load' instruction. (We assume it is new.) 759 */ 760 if ((error = st_load(st, LD_LOAD, XS_CTL_SILENT)) != 0) 761 return (error); 762 /* 763 * Throw another dummy instruction to catch 764 * 'Unit attention' errors. Many drives give 765 * these after doing a Load instruction (with 766 * the MEDIUM MAY HAVE CHANGED asc/ascq). 767 */ 768 scsipi_test_unit_ready(periph, XS_CTL_SILENT); /* XXX */ 769 770 /* 771 * Some devices can't tell you much until they have been 772 * asked to look at the media. This quirk does this. 773 */ 774 if (st->quirks & ST_Q_SENSE_HELP) 775 if ((error = st_touch_tape(st)) != 0) 776 return (error); 777 /* 778 * Load the physical device parameters 779 * loads: blkmin, blkmax 780 */ 781 if ((error = st->ops(st, ST_OPS_RBL, 0)) != 0) 782 return (error); 783 /* 784 * Load the media dependent parameters 785 * includes: media_blksize,media_density,numblks 786 * As we have a tape in, it should be reflected here. 787 * If not you may need the "quirk" above. 788 */ 789 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 790 return (error); 791 /* 792 * If we have gained a permanent density from somewhere, 793 * then use it in preference to the one supplied by 794 * default by the driver. 795 */ 796 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 797 st->density = st->modes[dsty].density; 798 else 799 st->density = st->media_density; 800 /* 801 * If we have gained a permanent blocksize 802 * then use it in preference to the one supplied by 803 * default by the driver. 804 */ 805 st->flags &= ~ST_FIXEDBLOCKS; 806 if (st->modeflags[dsty] & 807 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 808 st->blksize = st->modes[dsty].blksize; 809 if (st->blksize) 810 st->flags |= ST_FIXEDBLOCKS; 811 } else { 812 if ((error = st_decide_mode(st, FALSE)) != 0) 813 return (error); 814 } 815 if ((error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 816 /* ATAPI will return ENODEV for this, and this may be OK */ 817 if (error != ENODEV) { 818 printf("%s: cannot set selected mode\n", 819 st->sc_dev.dv_xname); 820 return (error); 821 } 822 } 823 if (!(st->quirks & ST_Q_NOPREVENT)) { 824 scsipi_prevent(periph, PR_PREVENT, 825 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 826 } 827 st->flags &= ~ST_NEW_MOUNT; 828 st->flags |= ST_MOUNTED; 829 periph->periph_flags |= PERIPH_MEDIA_LOADED; /* move earlier? */ 830 831 return (0); 832 } 833 834 /* 835 * End the present mount session. 836 * Rewind, and optionally eject the tape. 837 * Reset various flags to indicate that all new 838 * operations require another mount operation 839 */ 840 void 841 st_unmount(st, eject) 842 struct st_softc *st; 843 boolean eject; 844 { 845 struct scsipi_periph *periph = st->sc_periph; 846 int nmarks; 847 848 if ((st->flags & ST_MOUNTED) == 0) 849 return; 850 SC_DEBUG(periph, SCSIPI_DB1, ("unmounting\n")); 851 st_check_eod(st, FALSE, &nmarks, XS_CTL_IGNORE_NOT_READY); 852 st_rewind(st, 0, XS_CTL_IGNORE_NOT_READY); 853 854 /* 855 * Section 9.3.3 of the SCSI specs states that a device shall return 856 * the density value specified in the last succesfull MODE SELECT 857 * after an unload operation, in case it is not able to 858 * automatically determine the density of the new medium. 859 * 860 * So we instruct the device to use the default density, which will 861 * prevent the use of stale density values (in particular, 862 * in st_touch_tape(). 863 */ 864 st->density = 0; 865 if (st->ops(st, ST_OPS_MODESELECT, 0) != 0) { 866 printf("%s: WARNING: cannot revert to default density\n", 867 st->sc_dev.dv_xname); 868 } 869 870 scsipi_prevent(periph, PR_ALLOW, 871 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 872 if (eject) 873 st_load(st, LD_UNLOAD, XS_CTL_IGNORE_NOT_READY); 874 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 875 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 876 } 877 878 /* 879 * Given all we know about the device, media, mode, 'quirks' and 880 * initial operation, make a decision as to how we should be set 881 * to run (regarding blocking and EOD marks) 882 */ 883 int 884 st_decide_mode(st, first_read) 885 struct st_softc *st; 886 boolean first_read; 887 { 888 889 SC_DEBUG(st->sc_periph, SCSIPI_DB2, ("starting block mode decision\n")); 890 891 /* 892 * If the drive can only handle fixed-length blocks and only at 893 * one size, perhaps we should just do that. 894 */ 895 if (st->blkmin && (st->blkmin == st->blkmax)) { 896 st->flags |= ST_FIXEDBLOCKS; 897 st->blksize = st->blkmin; 898 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 899 ("blkmin == blkmax of %d\n", st->blkmin)); 900 goto done; 901 } 902 /* 903 * If the tape density mandates (or even suggests) use of fixed 904 * or variable-length blocks, comply. 905 */ 906 switch (st->density) { 907 case HALFINCH_800: 908 case HALFINCH_1600: 909 case HALFINCH_6250: 910 case DDS: 911 st->flags &= ~ST_FIXEDBLOCKS; 912 st->blksize = 0; 913 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 914 ("density specified variable\n")); 915 goto done; 916 case QIC_11: 917 case QIC_24: 918 case QIC_120: 919 case QIC_150: 920 case QIC_525: 921 case QIC_1320: 922 case QIC_3095: 923 case QIC_3220: 924 st->flags |= ST_FIXEDBLOCKS; 925 if (st->media_blksize > 0) 926 st->blksize = st->media_blksize; 927 else 928 st->blksize = DEF_FIXED_BSIZE; 929 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 930 ("density specified fixed\n")); 931 goto done; 932 } 933 /* 934 * If we're about to read the tape, perhaps we should choose 935 * fixed or variable-length blocks and block size according to 936 * what the drive found on the tape. 937 */ 938 if (first_read && 939 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 940 (st->media_blksize == DEF_FIXED_BSIZE) || 941 (st->media_blksize == 1024))) { 942 if (st->media_blksize > 0) 943 st->flags |= ST_FIXEDBLOCKS; 944 else 945 st->flags &= ~ST_FIXEDBLOCKS; 946 st->blksize = st->media_blksize; 947 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 948 ("Used media_blksize of %d\n", st->media_blksize)); 949 goto done; 950 } 951 /* 952 * We're getting no hints from any direction. Choose variable- 953 * length blocks arbitrarily. 954 */ 955 st->flags &= ~ST_FIXEDBLOCKS; 956 st->blksize = 0; 957 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 958 ("Give up and default to variable mode\n")); 959 960 done: 961 /* 962 * Decide whether or not to write two file marks to signify end- 963 * of-data. Make the decision as a function of density. If 964 * the decision is not to use a second file mark, the SCSI BLANK 965 * CHECK condition code will be recognized as end-of-data when 966 * first read. 967 * (I think this should be a by-product of fixed/variable..julian) 968 */ 969 switch (st->density) { 970 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 971 case QIC_11: 972 case QIC_24: 973 case QIC_120: 974 case QIC_150: 975 case QIC_525: 976 case QIC_1320: 977 case QIC_3095: 978 case QIC_3220: 979 st->flags &= ~ST_2FM_AT_EOD; 980 break; 981 default: 982 st->flags |= ST_2FM_AT_EOD; 983 } 984 return (0); 985 } 986 987 /* 988 * Actually translate the requested transfer into 989 * one the physical driver can understand 990 * The transfer is described by a buf and will include 991 * only one physical transfer. 992 */ 993 void 994 ststrategy(bp) 995 struct buf *bp; 996 { 997 struct st_softc *st = bp->b_devvp->v_devcookie; 998 int s; 999 1000 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1001 ("ststrategy %ld bytes @ blk %d\n", bp->b_bcount, bp->b_blkno)); 1002 /* 1003 * If it's a null transfer, return immediatly 1004 */ 1005 if (bp->b_bcount == 0) 1006 goto done; 1007 1008 /* If offset is negative, error */ 1009 if (bp->b_blkno < 0) { 1010 bp->b_error = EINVAL; 1011 goto bad; 1012 } 1013 1014 /* 1015 * Odd sized request on fixed drives are verboten 1016 */ 1017 if (st->flags & ST_FIXEDBLOCKS) { 1018 if (bp->b_bcount % st->blksize) { 1019 printf("%s: bad request, must be multiple of %d\n", 1020 st->sc_dev.dv_xname, st->blksize); 1021 bp->b_error = EIO; 1022 goto bad; 1023 } 1024 } 1025 /* 1026 * as are out-of-range requests on variable drives. 1027 */ 1028 else if (bp->b_bcount < st->blkmin || 1029 (st->blkmax && bp->b_bcount > st->blkmax)) { 1030 printf("%s: bad request, must be between %d and %d\n", 1031 st->sc_dev.dv_xname, st->blkmin, st->blkmax); 1032 bp->b_error = EIO; 1033 goto bad; 1034 } 1035 s = splbio(); 1036 1037 /* 1038 * Place it in the queue of activities for this tape 1039 * at the end (a bit silly because we only have on user.. 1040 * (but it could fork())) 1041 */ 1042 BUFQ_INSERT_TAIL(&st->buf_queue, bp); 1043 1044 /* 1045 * Tell the device to get going on the transfer if it's 1046 * not doing anything, otherwise just wait for completion 1047 * (All a bit silly if we're only allowing 1 open but..) 1048 */ 1049 ststart(st->sc_periph); 1050 1051 splx(s); 1052 return; 1053 bad: 1054 bp->b_flags |= B_ERROR; 1055 done: 1056 /* 1057 * Correctly set the buf to indicate a completed xfer 1058 */ 1059 bp->b_resid = bp->b_bcount; 1060 biodone(bp); 1061 return; 1062 } 1063 1064 /* 1065 * ststart looks to see if there is a buf waiting for the device 1066 * and that the device is not already busy. If both are true, 1067 * It dequeues the buf and creates a scsi command to perform the 1068 * transfer required. The transfer request will call scsipi_done 1069 * on completion, which will in turn call this routine again 1070 * so that the next queued transfer is performed. 1071 * The bufs are queued by the strategy routine (ststrategy) 1072 * 1073 * This routine is also called after other non-queued requests 1074 * have been made of the scsi driver, to ensure that the queue 1075 * continues to be drained. 1076 * ststart() is called at splbio 1077 */ 1078 void 1079 ststart(periph) 1080 struct scsipi_periph *periph; 1081 { 1082 struct st_softc *st = (void *)periph->periph_dev; 1083 struct buf *bp; 1084 struct scsi_rw_tape cmd; 1085 int flags, error; 1086 1087 SC_DEBUG(periph, SCSIPI_DB2, ("ststart ")); 1088 /* 1089 * See if there is a buf to do and we are not already 1090 * doing one 1091 */ 1092 while (periph->periph_active < periph->periph_openings) { 1093 /* if a special awaits, let it proceed first */ 1094 if (periph->periph_flags & PERIPH_WAITING) { 1095 periph->periph_flags &= ~PERIPH_WAITING; 1096 wakeup((caddr_t)periph); 1097 return; 1098 } 1099 1100 if ((bp = BUFQ_FIRST(&st->buf_queue)) == NULL) 1101 return; 1102 BUFQ_REMOVE(&st->buf_queue, bp); 1103 1104 /* 1105 * If the device has been unmounted by the user 1106 * then throw away all requests until done. 1107 */ 1108 if ((st->flags & ST_MOUNTED) == 0 || 1109 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 1110 /* make sure that one implies the other.. */ 1111 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 1112 bp->b_flags |= B_ERROR; 1113 bp->b_error = EIO; 1114 bp->b_resid = bp->b_bcount; 1115 biodone(bp); 1116 continue; 1117 } 1118 /* 1119 * only FIXEDBLOCK devices have pending I/O or space operations. 1120 */ 1121 if (st->flags & ST_FIXEDBLOCKS) { 1122 /* 1123 * If we are at a filemark but have not reported it yet 1124 * then we should report it now 1125 */ 1126 if (st->flags & ST_AT_FILEMARK) { 1127 if ((bp->b_flags & B_READ) == B_WRITE) { 1128 /* 1129 * Handling of ST_AT_FILEMARK in 1130 * st_space will fill in the right file 1131 * mark count. 1132 * Back up over filemark 1133 */ 1134 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1135 bp->b_flags |= B_ERROR; 1136 bp->b_error = EIO; 1137 biodone(bp); 1138 continue; 1139 } 1140 } else { 1141 bp->b_resid = bp->b_bcount; 1142 bp->b_error = 0; 1143 bp->b_flags &= ~B_ERROR; 1144 st->flags &= ~ST_AT_FILEMARK; 1145 biodone(bp); 1146 continue; /* seek more work */ 1147 } 1148 } 1149 } 1150 /* 1151 * If we are at EOM but have not reported it 1152 * yet then we should report it now. 1153 */ 1154 if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { 1155 bp->b_resid = bp->b_bcount; 1156 if (st->flags & ST_EIO_PENDING) { 1157 bp->b_error = EIO; 1158 bp->b_flags |= B_ERROR; 1159 } 1160 st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); 1161 biodone(bp); 1162 continue; /* seek more work */ 1163 } 1164 1165 /* 1166 * Fill out the scsi command 1167 */ 1168 memset(&cmd, 0, sizeof(cmd)); 1169 flags = XS_CTL_NOSLEEP | XS_CTL_ASYNC; 1170 if ((bp->b_flags & B_READ) == B_WRITE) { 1171 cmd.opcode = WRITE; 1172 st->flags &= ~ST_FM_WRITTEN; 1173 flags |= XS_CTL_DATA_OUT; 1174 } else { 1175 cmd.opcode = READ; 1176 flags |= XS_CTL_DATA_IN; 1177 } 1178 1179 /* 1180 * Handle "fixed-block-mode" tape drives by using the 1181 * block count instead of the length. 1182 */ 1183 if (st->flags & ST_FIXEDBLOCKS) { 1184 cmd.byte2 |= SRW_FIXED; 1185 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1186 } else 1187 _lto3b(bp->b_bcount, cmd.len); 1188 1189 /* 1190 * go ask the adapter to do all this for us 1191 */ 1192 error = scsipi_command(periph, 1193 (struct scsipi_generic *)&cmd, sizeof(cmd), 1194 (u_char *)bp->b_data, bp->b_bcount, 1195 0, ST_IO_TIME, bp, flags); 1196 if (error) { 1197 printf("%s: not queued, error %d\n", 1198 st->sc_dev.dv_xname, error); 1199 } 1200 } /* go back and see if we can cram more work in.. */ 1201 } 1202 1203 void 1204 stdone(xs) 1205 struct scsipi_xfer *xs; 1206 { 1207 struct st_softc *st = (void *)xs->xs_periph->periph_dev; 1208 1209 if (xs->bp != NULL) { 1210 if ((xs->bp->b_flags & B_READ) == B_WRITE) { 1211 st->flags |= ST_WRITTEN; 1212 } else { 1213 st->flags &= ~ST_WRITTEN; 1214 } 1215 #if NRND > 0 1216 rnd_add_uint32(&st->rnd_source, xs->bp->b_blkno); 1217 #endif 1218 } 1219 } 1220 1221 int 1222 stread(devvp, uio, iomode) 1223 struct vnode *devvp; 1224 struct uio *uio; 1225 int iomode; 1226 { 1227 struct st_softc *st = devvp->v_devcookie; 1228 1229 return (physio(ststrategy, NULL, devvp, B_READ, 1230 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1231 } 1232 1233 int 1234 stwrite(devvp, uio, iomode) 1235 struct vnode *devvp; 1236 struct uio *uio; 1237 int iomode; 1238 { 1239 struct st_softc *st = devvp->v_devcookie; 1240 1241 return (physio(ststrategy, NULL, devvp, B_WRITE, 1242 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1243 } 1244 1245 /* 1246 * Perform special action on behalf of the user; 1247 * knows about the internals of this device 1248 */ 1249 int 1250 stioctl(devvp, cmd, arg, flag, p) 1251 struct vnode *devvp; 1252 u_long cmd; 1253 caddr_t arg; 1254 int flag; 1255 struct proc *p; 1256 { 1257 int error = 0; 1258 int unit; 1259 int number, nmarks, dsty; 1260 int flags; 1261 struct st_softc *st = devvp->v_devcookie; 1262 int hold_blksize; 1263 u_int8_t hold_density; 1264 struct mtop *mt = (struct mtop *) arg; 1265 1266 /* 1267 * Find the device that the user is talking about 1268 */ 1269 flags = 0; /* give error messages, act on errors etc. */ 1270 unit = STUNIT(devvp->v_rdev); 1271 dsty = STDSTY(devvp->v_rdev); 1272 hold_blksize = st->blksize; 1273 hold_density = st->density; 1274 1275 switch ((u_int) cmd) { 1276 1277 case MTIOCGET: { 1278 struct mtget *g = (struct mtget *) arg; 1279 /* 1280 * (to get the current state of READONLY) 1281 */ 1282 error = st->ops(st, ST_OPS_MODESENSE, XS_CTL_SILENT); 1283 if (error) { 1284 /* 1285 * Ignore the error if in control mode; 1286 * this is mandated by st(4). 1287 */ 1288 if (STMODE(devvp->v_rdev) != CTRL_MODE) 1289 break; 1290 error = 0; 1291 } 1292 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("[ioctl: get status]\n")); 1293 memset(g, 0, sizeof(struct mtget)); 1294 g->mt_type = 0x7; /* Ultrix compat *//*? */ 1295 g->mt_blksiz = st->blksize; 1296 g->mt_density = st->density; 1297 g->mt_mblksiz[0] = st->modes[0].blksize; 1298 g->mt_mblksiz[1] = st->modes[1].blksize; 1299 g->mt_mblksiz[2] = st->modes[2].blksize; 1300 g->mt_mblksiz[3] = st->modes[3].blksize; 1301 g->mt_mdensity[0] = st->modes[0].density; 1302 g->mt_mdensity[1] = st->modes[1].density; 1303 g->mt_mdensity[2] = st->modes[2].density; 1304 g->mt_mdensity[3] = st->modes[3].density; 1305 if (st->flags & ST_READONLY) 1306 g->mt_dsreg |= MT_DS_RDONLY; 1307 if (st->flags & ST_MOUNTED) 1308 g->mt_dsreg |= MT_DS_MOUNTED; 1309 g->mt_resid = st->mt_resid; 1310 g->mt_erreg = st->mt_erreg; 1311 /* 1312 * clear latched errors. 1313 */ 1314 st->mt_resid = 0; 1315 st->mt_erreg = 0; 1316 st->asc = 0; 1317 st->ascq = 0; 1318 break; 1319 } 1320 case MTIOCTOP: { 1321 1322 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1323 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1324 mt->mt_count)); 1325 1326 /* compat: in U*x it is a short */ 1327 number = mt->mt_count; 1328 switch ((short) (mt->mt_op)) { 1329 case MTWEOF: /* write an end-of-file record */ 1330 error = st_write_filemarks(st, number, flags); 1331 break; 1332 case MTBSF: /* backward space file */ 1333 number = -number; 1334 case MTFSF: /* forward space file */ 1335 error = st_check_eod(st, FALSE, &nmarks, flags); 1336 if (!error) 1337 error = st_space(st, number - nmarks, 1338 SP_FILEMARKS, flags); 1339 break; 1340 case MTBSR: /* backward space record */ 1341 number = -number; 1342 case MTFSR: /* forward space record */ 1343 error = st_check_eod(st, TRUE, &nmarks, flags); 1344 if (!error) 1345 error = st_space(st, number, SP_BLKS, flags); 1346 break; 1347 case MTREW: /* rewind */ 1348 error = st_rewind(st, 0, flags); 1349 break; 1350 case MTOFFL: /* rewind and put the drive offline */ 1351 st_unmount(st, EJECT); 1352 break; 1353 case MTNOP: /* no operation, sets status only */ 1354 break; 1355 case MTRETEN: /* retension the tape */ 1356 error = st_load(st, LD_RETENSION, flags); 1357 if (!error) 1358 error = st_load(st, LD_LOAD, flags); 1359 break; 1360 case MTEOM: /* forward space to end of media */ 1361 error = st_check_eod(st, FALSE, &nmarks, flags); 1362 if (!error) 1363 error = st_space(st, 1, SP_EOM, flags); 1364 break; 1365 case MTCACHE: /* enable controller cache */ 1366 st->flags &= ~ST_DONTBUFFER; 1367 goto try_new_value; 1368 case MTNOCACHE: /* disable controller cache */ 1369 st->flags |= ST_DONTBUFFER; 1370 goto try_new_value; 1371 case MTERASE: /* erase volume */ 1372 error = st_erase(st, number, flags); 1373 break; 1374 case MTSETBSIZ: /* Set block size for device */ 1375 #ifdef NOTYET 1376 if (!(st->flags & ST_NEW_MOUNT)) { 1377 uprintf("re-mount tape before changing blocksize"); 1378 error = EINVAL; 1379 break; 1380 } 1381 #endif 1382 if (number == 0) 1383 st->flags &= ~ST_FIXEDBLOCKS; 1384 else { 1385 if ((st->blkmin || st->blkmax) && 1386 (number < st->blkmin || 1387 number > st->blkmax)) { 1388 error = EINVAL; 1389 break; 1390 } 1391 st->flags |= ST_FIXEDBLOCKS; 1392 } 1393 st->blksize = number; 1394 st->flags |= ST_BLOCK_SET; /*XXX */ 1395 goto try_new_value; 1396 1397 case MTSETDNSTY: /* Set density for device and mode */ 1398 /* 1399 * Any number >= 0 and <= 0xff is legal. Numbers 1400 * above 0x80 are 'vendor unique'. 1401 */ 1402 if (number < 0 || number > 255) { 1403 error = EINVAL; 1404 break; 1405 } else 1406 st->density = number; 1407 goto try_new_value; 1408 1409 case MTCMPRESS: 1410 error = st->ops(st, (number == 0) ? 1411 ST_OPS_CMPRSS_OFF : ST_OPS_CMPRSS_ON, 1412 XS_CTL_SILENT); 1413 break; 1414 1415 case MTEWARN: 1416 if (number) 1417 st->flags |= ST_EARLYWARN; 1418 else 1419 st->flags &= ~ST_EARLYWARN; 1420 break; 1421 1422 default: 1423 error = EINVAL; 1424 } 1425 break; 1426 } 1427 case MTIOCIEOT: 1428 case MTIOCEEOT: 1429 break; 1430 1431 case MTIOCRDSPOS: 1432 error = st_rdpos(st, 0, (u_int32_t *) arg); 1433 break; 1434 1435 case MTIOCRDHPOS: 1436 error = st_rdpos(st, 1, (u_int32_t *) arg); 1437 break; 1438 1439 case MTIOCSLOCATE: 1440 error = st_setpos(st, 0, (u_int32_t *) arg); 1441 break; 1442 1443 case MTIOCHLOCATE: 1444 error = st_setpos(st, 1, (u_int32_t *) arg); 1445 break; 1446 1447 1448 default: 1449 error = scsipi_do_ioctl(st->sc_periph, devvp, cmd, arg, 1450 flag, p); 1451 break; 1452 } 1453 return (error); 1454 /*-----------------------------*/ 1455 try_new_value: 1456 /* 1457 * Check that the mode being asked for is aggreeable to the 1458 * drive. If not, put it back the way it was. 1459 * 1460 * If in control mode, we can make (persistent) mode changes 1461 * even if no medium is loaded (see st(4)). 1462 */ 1463 if ((STMODE(devvp->v_rdev) != CTRL_MODE || 1464 (st->flags & ST_MOUNTED) != 0) && 1465 (error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 1466 /* put it back as it was */ 1467 printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); 1468 st->density = hold_density; 1469 st->blksize = hold_blksize; 1470 if (st->blksize) 1471 st->flags |= ST_FIXEDBLOCKS; 1472 else 1473 st->flags &= ~ST_FIXEDBLOCKS; 1474 return (error); 1475 } 1476 /* 1477 * As the drive liked it, if we are setting a new default, 1478 * set it into the structures as such. 1479 * 1480 * The means for deciding this are not finalised yet- but 1481 * if the device was opened in Control Mode, the values 1482 * are persistent now across mounts. 1483 */ 1484 if (STMODE(devvp->v_rdev) == CTRL_MODE) { 1485 switch ((short) (mt->mt_op)) { 1486 case MTSETBSIZ: 1487 st->modes[dsty].blksize = st->blksize; 1488 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1489 break; 1490 case MTSETDNSTY: 1491 st->modes[dsty].density = st->density; 1492 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1493 break; 1494 } 1495 } 1496 return (0); 1497 } 1498 1499 /* 1500 * Do a synchronous read. 1501 */ 1502 int 1503 st_read(st, buf, size, flags) 1504 struct st_softc *st; 1505 int size; 1506 int flags; 1507 char *buf; 1508 { 1509 struct scsi_rw_tape cmd; 1510 1511 /* 1512 * If it's a null transfer, return immediatly 1513 */ 1514 if (size == 0) 1515 return (0); 1516 memset(&cmd, 0, sizeof(cmd)); 1517 cmd.opcode = READ; 1518 if (st->flags & ST_FIXEDBLOCKS) { 1519 cmd.byte2 |= SRW_FIXED; 1520 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1521 cmd.len); 1522 } else 1523 _lto3b(size, cmd.len); 1524 return (scsipi_command(st->sc_periph, 1525 (struct scsipi_generic *)&cmd, sizeof(cmd), 1526 (u_char *)buf, size, 0, ST_IO_TIME, NULL, flags | XS_CTL_DATA_IN)); 1527 } 1528 1529 /* 1530 * issue an erase command 1531 */ 1532 int 1533 st_erase(st, full, flags) 1534 struct st_softc *st; 1535 int full, flags; 1536 { 1537 int tmo; 1538 struct scsi_erase cmd; 1539 1540 /* 1541 * Full erase means set LONG bit in erase command, which asks 1542 * the drive to erase the entire unit. Without this bit, we're 1543 * asking the drive to write an erase gap. 1544 */ 1545 memset(&cmd, 0, sizeof(cmd)); 1546 cmd.opcode = ERASE; 1547 if (full) { 1548 cmd.byte2 = SE_LONG; 1549 tmo = ST_SPC_TIME; 1550 } else { 1551 tmo = ST_IO_TIME; 1552 } 1553 1554 /* 1555 * XXX We always do this asynchronously, for now, unless the device 1556 * has the ST_Q_ERASE_NOIMM quirk. How long should we wait if we 1557 * want to (eventually) to it synchronously? 1558 */ 1559 if ((st->quirks & ST_Q_ERASE_NOIMM) == 0) 1560 cmd.byte2 |= SE_IMMED; 1561 1562 return (scsipi_command(st->sc_periph, 1563 (struct scsipi_generic *)&cmd, sizeof(cmd), 1564 0, 0, ST_RETRIES, tmo, NULL, flags)); 1565 } 1566 1567 /* 1568 * skip N blocks/filemarks/seq filemarks/eom 1569 */ 1570 int 1571 st_space(st, number, what, flags) 1572 struct st_softc *st; 1573 u_int what; 1574 int flags; 1575 int number; 1576 { 1577 struct scsi_space cmd; 1578 int error; 1579 1580 switch (what) { 1581 case SP_BLKS: 1582 if (st->flags & ST_PER_ACTION) { 1583 if (number > 0) { 1584 st->flags &= ~ST_PER_ACTION; 1585 return (EIO); 1586 } else if (number < 0) { 1587 if (st->flags & ST_AT_FILEMARK) { 1588 /* 1589 * Handling of ST_AT_FILEMARK 1590 * in st_space will fill in the 1591 * right file mark count. 1592 */ 1593 error = st_space(st, 0, SP_FILEMARKS, 1594 flags); 1595 if (error) 1596 return (error); 1597 } 1598 if (st->flags & ST_BLANK_READ) { 1599 st->flags &= ~ST_BLANK_READ; 1600 return (EIO); 1601 } 1602 st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); 1603 } 1604 } 1605 break; 1606 case SP_FILEMARKS: 1607 if (st->flags & ST_EIO_PENDING) { 1608 if (number > 0) { 1609 /* pretend we just discovered the error */ 1610 st->flags &= ~ST_EIO_PENDING; 1611 return (EIO); 1612 } else if (number < 0) { 1613 /* back away from the error */ 1614 st->flags &= ~ST_EIO_PENDING; 1615 } 1616 } 1617 if (st->flags & ST_AT_FILEMARK) { 1618 st->flags &= ~ST_AT_FILEMARK; 1619 number--; 1620 } 1621 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 1622 /* back away from unwritten tape */ 1623 st->flags &= ~ST_BLANK_READ; 1624 number++; /* XXX dubious */ 1625 } 1626 break; 1627 case SP_EOM: 1628 if (st->flags & ST_EOM_PENDING) { 1629 /* we're already there */ 1630 st->flags &= ~ST_EOM_PENDING; 1631 return (0); 1632 } 1633 if (st->flags & ST_EIO_PENDING) { 1634 /* pretend we just discovered the error */ 1635 st->flags &= ~ST_EIO_PENDING; 1636 return (EIO); 1637 } 1638 if (st->flags & ST_AT_FILEMARK) 1639 st->flags &= ~ST_AT_FILEMARK; 1640 break; 1641 } 1642 if (number == 0) 1643 return (0); 1644 1645 memset(&cmd, 0, sizeof(cmd)); 1646 cmd.opcode = SPACE; 1647 cmd.byte2 = what; 1648 _lto3b(number, cmd.number); 1649 1650 return (scsipi_command(st->sc_periph, 1651 (struct scsipi_generic *)&cmd, sizeof(cmd), 1652 0, 0, 0, ST_SPC_TIME, NULL, flags)); 1653 } 1654 1655 /* 1656 * write N filemarks 1657 */ 1658 int 1659 st_write_filemarks(st, number, flags) 1660 struct st_softc *st; 1661 int flags; 1662 int number; 1663 { 1664 struct scsi_write_filemarks cmd; 1665 1666 /* 1667 * It's hard to write a negative number of file marks. 1668 * Don't try. 1669 */ 1670 if (number < 0) 1671 return (EINVAL); 1672 switch (number) { 1673 case 0: /* really a command to sync the drive's buffers */ 1674 break; 1675 case 1: 1676 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 1677 st->flags &= ~ST_WRITTEN; 1678 else 1679 st->flags |= ST_FM_WRITTEN; 1680 st->flags &= ~ST_PER_ACTION; 1681 break; 1682 default: 1683 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 1684 } 1685 1686 memset(&cmd, 0, sizeof(cmd)); 1687 cmd.opcode = WRITE_FILEMARKS; 1688 _lto3b(number, cmd.number); 1689 1690 return (scsipi_command(st->sc_periph, 1691 (struct scsipi_generic *)&cmd, sizeof(cmd), 1692 0, 0, 0, ST_IO_TIME * 4, NULL, flags)); 1693 } 1694 1695 /* 1696 * Make sure the right number of file marks is on tape if the 1697 * tape has been written. If the position argument is true, 1698 * leave the tape positioned where it was originally. 1699 * 1700 * nmarks returns the number of marks to skip (or, if position 1701 * true, which were skipped) to get back original position. 1702 */ 1703 int 1704 st_check_eod(st, position, nmarks, flags) 1705 struct st_softc *st; 1706 boolean position; 1707 int *nmarks; 1708 int flags; 1709 { 1710 int error; 1711 1712 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 1713 default: 1714 *nmarks = 0; 1715 return (0); 1716 case ST_WRITTEN: 1717 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 1718 *nmarks = 1; 1719 break; 1720 case ST_WRITTEN | ST_2FM_AT_EOD: 1721 *nmarks = 2; 1722 } 1723 error = st_write_filemarks(st, *nmarks, flags); 1724 if (position && !error) 1725 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 1726 return (error); 1727 } 1728 1729 /* 1730 * load/unload/retension 1731 */ 1732 int 1733 st_load(st, type, flags) 1734 struct st_softc *st; 1735 u_int type; 1736 int flags; 1737 { 1738 int error; 1739 struct scsi_load cmd; 1740 1741 if (type != LD_LOAD) { 1742 int nmarks; 1743 1744 error = st_check_eod(st, FALSE, &nmarks, flags); 1745 if (error) { 1746 printf("%s: failed to write closing filemarks at " 1747 "unload, errno=%d\n", st->sc_dev.dv_xname, error); 1748 return (error); 1749 } 1750 } 1751 if (st->quirks & ST_Q_IGNORE_LOADS) { 1752 if (type == LD_LOAD) { 1753 /* 1754 * If we ignore loads, at least we should try a rewind. 1755 */ 1756 return st_rewind(st, 0, flags); 1757 } 1758 /* otherwise, we should do what's asked of us */ 1759 } 1760 1761 memset(&cmd, 0, sizeof(cmd)); 1762 cmd.opcode = LOAD; 1763 cmd.how = type; 1764 1765 error = scsipi_command(st->sc_periph, 1766 (struct scsipi_generic *)&cmd, sizeof(cmd), 1767 0, 0, ST_RETRIES, ST_SPC_TIME, NULL, flags); 1768 if (error) { 1769 printf("%s: error %d in st_load (op %d)\n", 1770 st->sc_dev.dv_xname, error, type); 1771 } 1772 return (error); 1773 } 1774 1775 /* 1776 * Rewind the device 1777 */ 1778 int 1779 st_rewind(st, immediate, flags) 1780 struct st_softc *st; 1781 u_int immediate; 1782 int flags; 1783 { 1784 struct scsi_rewind cmd; 1785 int error; 1786 int nmarks; 1787 1788 error = st_check_eod(st, FALSE, &nmarks, flags); 1789 if (error) { 1790 printf("%s: failed to write closing filemarks at " 1791 "rewind, errno=%d\n", st->sc_dev.dv_xname, error); 1792 return (error); 1793 } 1794 st->flags &= ~ST_PER_ACTION; 1795 1796 /* 1797 * ATAPI tapes always need foo to be set 1798 */ 1799 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1800 immediate = SR_IMMED; 1801 1802 memset(&cmd, 0, sizeof(cmd)); 1803 cmd.opcode = REWIND; 1804 cmd.byte2 = immediate; 1805 1806 error = scsipi_command(st->sc_periph, 1807 (struct scsipi_generic *)&cmd, sizeof(cmd), 0, 0, ST_RETRIES, 1808 immediate ? ST_CTL_TIME: ST_SPC_TIME, NULL, flags); 1809 if (error) { 1810 printf("%s: error %d trying to rewind\n", 1811 st->sc_dev.dv_xname, error); 1812 } 1813 return (error); 1814 } 1815 1816 int 1817 st_rdpos(st, hard, blkptr) 1818 struct st_softc *st; 1819 int hard; 1820 u_int32_t *blkptr; 1821 { 1822 int error; 1823 u_int8_t posdata[20]; 1824 struct scsi_tape_read_position cmd; 1825 1826 /* 1827 * First flush any pending writes... 1828 */ 1829 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 1830 1831 /* 1832 * The latter case is for 'write protected' tapes 1833 * which are too stupid to recognize a zero count 1834 * for writing filemarks as a no-op. 1835 */ 1836 if (error != 0 && error != EACCES && error != EROFS) 1837 return (error); 1838 1839 memset(&cmd, 0, sizeof(cmd)); 1840 memset(&posdata, 0, sizeof(posdata)); 1841 cmd.opcode = READ_POSITION; 1842 if (hard) 1843 cmd.byte1 = 1; 1844 1845 error = scsipi_command(st->sc_periph, 1846 (struct scsipi_generic *)&cmd, sizeof(cmd), (u_char *)&posdata, 1847 sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, 1848 XS_CTL_SILENT | XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); 1849 1850 if (error == 0) { 1851 #if 0 1852 printf("posdata:"); 1853 for (hard = 0; hard < sizeof(posdata); hard++) 1854 printf("%02x ", posdata[hard] & 0xff); 1855 printf("\n"); 1856 #endif 1857 if (posdata[0] & 0x4) /* Block Position Unknown */ 1858 error = EINVAL; 1859 else 1860 *blkptr = _4btol(&posdata[4]); 1861 } 1862 return (error); 1863 } 1864 1865 int 1866 st_setpos(st, hard, blkptr) 1867 struct st_softc *st; 1868 int hard; 1869 u_int32_t *blkptr; 1870 { 1871 int error; 1872 struct scsi_tape_locate cmd; 1873 1874 /* 1875 * First flush any pending writes. Strictly speaking, 1876 * we're not supposed to have to worry about this, 1877 * but let's be untrusting. 1878 */ 1879 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 1880 1881 /* 1882 * The latter case is for 'write protected' tapes 1883 * which are too stupid to recognize a zero count 1884 * for writing filemarks as a no-op. 1885 */ 1886 if (error != 0 && error != EACCES && error != EROFS) 1887 return (error); 1888 1889 memset(&cmd, 0, sizeof(cmd)); 1890 cmd.opcode = LOCATE; 1891 if (hard) 1892 cmd.byte2 = 1 << 2; 1893 _lto4b(*blkptr, cmd.blkaddr); 1894 error = scsipi_command(st->sc_periph, 1895 (struct scsipi_generic *)&cmd, sizeof(cmd), 1896 NULL, 0, ST_RETRIES, ST_SPC_TIME, NULL, 0); 1897 /* 1898 * XXX: Note file && block number position now unknown (if 1899 * XXX: these things ever start being maintained in this driver) 1900 */ 1901 return (error); 1902 } 1903 1904 1905 /* 1906 * Look at the returned sense and act on the error and determine 1907 * the unix error number to pass back..., 0 (== report no error), 1908 * -1 = retry the operation, -2 continue error processing. 1909 */ 1910 int 1911 st_interpret_sense(xs) 1912 struct scsipi_xfer *xs; 1913 { 1914 struct scsipi_periph *periph = xs->xs_periph; 1915 struct scsipi_sense_data *sense = &xs->sense.scsi_sense; 1916 struct buf *bp = xs->bp; 1917 struct st_softc *st = (void *)periph->periph_dev; 1918 int retval = EJUSTRETURN; 1919 int doprint = ((xs->xs_control & XS_CTL_SILENT) == 0); 1920 u_int8_t key; 1921 int32_t info; 1922 1923 /* 1924 * If it isn't a extended or extended/deferred error, let 1925 * the generic code handle it. 1926 */ 1927 if ((sense->error_code & SSD_ERRCODE) != 0x70 && 1928 (sense->error_code & SSD_ERRCODE) != 0x71) { /* DEFFERRED */ 1929 return (retval); 1930 } 1931 1932 if (sense->error_code & SSD_ERRCODE_VALID) 1933 info = _4btol(sense->info); 1934 else 1935 info = xs->datalen; /* bad choice if fixed blocks */ 1936 key = sense->flags & SSD_KEY; 1937 st->mt_erreg = key; 1938 st->asc = sense->add_sense_code; 1939 st->ascq = sense->add_sense_code_qual; 1940 st->mt_resid = (short) info; 1941 1942 /* 1943 * If the device is not open yet, let generic handle 1944 */ 1945 if ((periph->periph_flags & PERIPH_OPEN) == 0) { 1946 return (retval); 1947 } 1948 1949 1950 if (st->flags & ST_FIXEDBLOCKS) { 1951 xs->resid = info * st->blksize; 1952 if (sense->flags & SSD_EOM) { 1953 if ((st->flags & ST_EARLYWARN) == 0) 1954 st->flags |= ST_EIO_PENDING; 1955 st->flags |= ST_EOM_PENDING; 1956 if (bp) 1957 bp->b_resid = xs->resid; 1958 } 1959 if (sense->flags & SSD_FILEMARK) { 1960 st->flags |= ST_AT_FILEMARK; 1961 if (bp) 1962 bp->b_resid = xs->resid; 1963 } 1964 if (sense->flags & SSD_ILI) { 1965 st->flags |= ST_EIO_PENDING; 1966 if (bp) 1967 bp->b_resid = xs->resid; 1968 if (sense->error_code & SSD_ERRCODE_VALID && 1969 (xs->xs_control & XS_CTL_SILENT) == 0) 1970 printf("%s: block wrong size, %d blocks " 1971 "residual\n", st->sc_dev.dv_xname, info); 1972 1973 /* 1974 * This quirk code helps the drive read 1975 * the first tape block, regardless of 1976 * format. That is required for these 1977 * drives to return proper MODE SENSE 1978 * information. 1979 */ 1980 if ((st->quirks & ST_Q_SENSE_HELP) && 1981 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 1982 st->blksize -= 512; 1983 } 1984 /* 1985 * If data wanted and no data was transferred, do it immediately 1986 */ 1987 if (xs->datalen && xs->resid >= xs->datalen) { 1988 if (st->flags & ST_EIO_PENDING) 1989 return (EIO); 1990 if (st->flags & ST_AT_FILEMARK) { 1991 if (bp) 1992 bp->b_resid = xs->resid; 1993 return (0); 1994 } 1995 } 1996 } else { /* must be variable mode */ 1997 if (sense->flags & SSD_EOM) { 1998 /* 1999 * The current semantics of this 2000 * driver requires EOM detection 2001 * to return EIO unless early 2002 * warning detection is enabled 2003 * for variable mode (this is always 2004 * on for fixed block mode). 2005 */ 2006 if (st->flags & ST_EARLYWARN) { 2007 st->flags |= ST_EOM_PENDING; 2008 retval = 0; 2009 } else { 2010 retval = EIO; 2011 } 2012 2013 /* 2014 * If it's an unadorned EOM detection, 2015 * suppress printing an error. 2016 */ 2017 if (key == SKEY_NO_SENSE) { 2018 doprint = 0; 2019 } 2020 } else if (sense->flags & SSD_FILEMARK) { 2021 retval = 0; 2022 } else if (sense->flags & SSD_ILI) { 2023 if (info < 0) { 2024 /* 2025 * The tape record was bigger than the read 2026 * we issued. 2027 */ 2028 if ((xs->xs_control & XS_CTL_SILENT) == 0) { 2029 printf("%s: %d-byte tape record too big" 2030 " for %d-byte user buffer\n", 2031 st->sc_dev.dv_xname, 2032 xs->datalen - info, xs->datalen); 2033 } 2034 retval = EIO; 2035 } else { 2036 retval = 0; 2037 } 2038 } 2039 xs->resid = info; 2040 if (bp) 2041 bp->b_resid = info; 2042 } 2043 2044 #ifndef SCSIPI_DEBUG 2045 if (retval == 0 && key == SKEY_NO_SENSE) 2046 doprint = 0; 2047 #endif 2048 if (key == SKEY_BLANK_CHECK) { 2049 /* 2050 * This quirk code helps the drive read the 2051 * first tape block, regardless of format. That 2052 * is required for these drives to return proper 2053 * MODE SENSE information. 2054 */ 2055 if ((st->quirks & ST_Q_SENSE_HELP) && 2056 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 2057 /* still starting */ 2058 st->blksize -= 512; 2059 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 2060 st->flags |= ST_BLANK_READ; 2061 xs->resid = xs->datalen; 2062 if (bp) { 2063 bp->b_resid = xs->resid; 2064 /* return an EOF */ 2065 } 2066 retval = 0; 2067 } 2068 } 2069 2070 /* 2071 * If generic sense processing will continue, we should not 2072 * print sense info here. 2073 */ 2074 if (retval == EJUSTRETURN) 2075 doprint = 0; 2076 2077 if (doprint) { 2078 #ifdef SCSIVERBOSE 2079 scsipi_print_sense(xs, 0); 2080 #else 2081 scsipi_printaddr(periph); 2082 printf("Sense Key 0x%02x", key); 2083 if ((sense->error_code & SSD_ERRCODE_VALID) != 0) { 2084 switch (key) { 2085 case SKEY_NOT_READY: 2086 case SKEY_ILLEGAL_REQUEST: 2087 case SKEY_UNIT_ATTENTION: 2088 case SKEY_WRITE_PROTECT: 2089 break; 2090 case SKEY_BLANK_CHECK: 2091 printf(", requested size: %d (decimal)", info); 2092 break; 2093 case SKEY_ABORTED_COMMAND: 2094 if (xs->xs_retries) 2095 printf(", retrying"); 2096 printf(", cmd 0x%x, info 0x%x", 2097 xs->cmd->opcode, info); 2098 break; 2099 default: 2100 printf(", info = %d (decimal)", info); 2101 } 2102 } 2103 if (sense->extra_len != 0) { 2104 int n; 2105 printf(", data ="); 2106 for (n = 0; n < sense->extra_len; n++) 2107 printf(" %02x", sense->cmd_spec_info[n]); 2108 } 2109 printf("\n"); 2110 #endif 2111 } 2112 return (retval); 2113 } 2114 2115 /* 2116 * The quirk here is that the drive returns some value to st_mode_sense 2117 * incorrectly until the tape has actually passed by the head. 2118 * 2119 * The method is to set the drive to large fixed-block state (user-specified 2120 * density and 1024-byte blocks), then read and rewind to get it to sense the 2121 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 2122 * work, as a last resort, try variable- length blocks. The result will be 2123 * the ability to do an accurate st_mode_sense. 2124 * 2125 * We know we can do a rewind because we just did a load, which implies rewind. 2126 * Rewind seems preferable to space backward if we have a virgin tape. 2127 * 2128 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 2129 * error processing, both part of st_interpret_sense. 2130 */ 2131 int 2132 st_touch_tape(st) 2133 struct st_softc *st; 2134 { 2135 char *buf; 2136 int readsize; 2137 int error; 2138 2139 buf = malloc(1024, M_TEMP, M_NOWAIT); 2140 if (buf == NULL) 2141 return (ENOMEM); 2142 2143 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 2144 goto bad; 2145 2146 /* 2147 * If the block size is already known from the 2148 * sense data, use it. Else start probing at 1024. 2149 */ 2150 if (st->media_blksize > 0) 2151 st->blksize = st->media_blksize; 2152 else 2153 st->blksize = 1024; 2154 2155 do { 2156 switch (st->blksize) { 2157 case 512: 2158 case 1024: 2159 readsize = st->blksize; 2160 st->flags |= ST_FIXEDBLOCKS; 2161 break; 2162 default: 2163 readsize = 1; 2164 st->flags &= ~ST_FIXEDBLOCKS; 2165 } 2166 if ((error = st->ops(st, ST_OPS_MODESELECT, XS_CTL_SILENT)) 2167 != 0) { 2168 /* 2169 * The device did not agree with the proposed 2170 * block size. If we exhausted our options, 2171 * return failure, else try another. 2172 */ 2173 if (readsize == 1) 2174 goto bad; 2175 st->blksize -= 512; 2176 continue; 2177 } 2178 st_read(st, buf, readsize, XS_CTL_SILENT); /* XXX */ 2179 if ((error = st_rewind(st, 0, 0)) != 0) { 2180 bad: free(buf, M_TEMP); 2181 return (error); 2182 } 2183 } while (readsize != 1 && readsize > st->blksize); 2184 2185 free(buf, M_TEMP); 2186 return (0); 2187 } 2188 2189 int 2190 stdump(dev, blkno, va, size) 2191 dev_t dev; 2192 daddr_t blkno; 2193 caddr_t va; 2194 size_t size; 2195 { 2196 2197 /* Not implemented. */ 2198 return (ENXIO); 2199 } 2200
Indexes created Fri Sep 26 20:09:58 GMT 2025