st.c revision 1.143.2.2
1 /* $NetBSD: st.c,v 1.143.2.2 2001/09/26 15:28:18 fvdl 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 dev_t rdev; 467 468 rdev = vdev_rdev(devvp); 469 unit = STUNIT(rdev); 470 if (unit >= st_cd.cd_ndevs) 471 return (ENXIO); 472 st = st_cd.cd_devs[unit]; 473 if (st == NULL) 474 return (ENXIO); 475 476 stmode = STMODE(rdev); 477 dsty = STDSTY(rdev); 478 479 periph = st->sc_periph; 480 adapt = periph->periph_channel->chan_adapter; 481 482 SC_DEBUG(periph, SCSIPI_DB1, ("open: dev=0x%x (unit %d (of %d))\n", 483 rdev, unit, st_cd.cd_ndevs)); 484 485 vdev_setprivdata(devvp, st); 486 487 /* 488 * Only allow one at a time 489 */ 490 if (periph->periph_flags & PERIPH_OPEN) { 491 printf("%s: already open\n", st->sc_dev.dv_xname); 492 return (EBUSY); 493 } 494 495 if ((error = scsipi_adapter_addref(adapt)) != 0) 496 return (error); 497 498 /* 499 * clear any latched errors. 500 */ 501 st->mt_resid = 0; 502 st->mt_erreg = 0; 503 st->asc = 0; 504 st->ascq = 0; 505 506 /* 507 * Catch any unit attention errors. Be silent about this 508 * unless we're already mounted. We ignore media change 509 * if we're in control mode or not mounted yet. 510 */ 511 if ((st->flags & ST_MOUNTED) == 0 || stmode == CTRL_MODE) { 512 #ifdef SCSIDEBUG 513 sflags = XS_CTL_IGNORE_MEDIA_CHANGE; 514 #else 515 sflags = XS_CTL_SILENT|XS_CTL_IGNORE_MEDIA_CHANGE; 516 #endif 517 } else 518 sflags = 0; 519 520 /* 521 * If we're already mounted or we aren't configured for 522 * a mount delay, only try a test unit ready once. Otherwise, 523 * try up to ST_MOUNT_DELAY times with a rest interval of 524 * one second between each try. 525 */ 526 527 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0) { 528 ntries = 1; 529 } else { 530 ntries = ST_MOUNT_DELAY; 531 } 532 533 for (error = tries = 0; tries < ntries; tries++) { 534 int slpintr, oflags; 535 536 /* 537 * If we had no error, or we're opening the control mode 538 * device, we jump out right away. 539 */ 540 541 error = scsipi_test_unit_ready(periph, sflags); 542 if (error == 0 || stmode == CTRL_MODE) { 543 break; 544 } 545 546 /* 547 * We had an error. 548 * 549 * If we're already mounted or we aren't configured for 550 * a mount delay, or the error isn't a NOT READY error, 551 * skip to the error exit now. 552 */ 553 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0 || 554 (st->mt_key != SKEY_NOT_READY)) { 555 goto bad; 556 } 557 558 /* 559 * clear any latched errors. 560 */ 561 st->mt_resid = 0; 562 st->mt_erreg = 0; 563 st->asc = 0; 564 st->ascq = 0; 565 566 /* 567 * Fake that we have the device open so 568 * we block other apps from getting in. 569 */ 570 571 oflags = periph->periph_flags; 572 periph->periph_flags |= PERIPH_OPEN; 573 574 slpintr = tsleep(&lbolt, PUSER|PCATCH, "stload", 0); 575 576 periph->periph_flags = oflags; /* restore flags */ 577 if (slpintr) { 578 goto bad; 579 } 580 } 581 582 583 /* 584 * If the mode is 3 (e.g. minor = 3,7,11,15) then the device has 585 * been opened to set defaults and perform other, usually non-I/O 586 * related, operations. In this case, do a quick check to see 587 * whether the unit actually had a tape loaded (this will be known 588 * as to whether or not we got a NOT READY for the above 589 * unit attention). If a tape is there, go do a mount sequence. 590 */ 591 if (stmode == CTRL_MODE && st->mt_key == SKEY_NOT_READY) { 592 periph->periph_flags |= PERIPH_OPEN; 593 return (0); 594 } 595 596 /* 597 * If we get this far and had an error set, that means we failed 598 * to pass the 'test unit ready' test for the non-controlmode device, 599 * so we bounce the open. 600 */ 601 602 if (error) 603 return (error); 604 605 /* 606 * Else, we're now committed to saying we're open. 607 */ 608 609 periph->periph_flags |= PERIPH_OPEN; /* unit attn are now errors */ 610 611 /* 612 * If it's a different mode, or if the media has been 613 * invalidated, unmount the tape from the previous 614 * session but continue with open processing 615 */ 616 if (st->last_dsty != dsty || 617 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 618 st_unmount(st, NOEJECT); 619 620 /* 621 * If we are not mounted, then we should start a new 622 * mount session. 623 */ 624 if (!(st->flags & ST_MOUNTED)) { 625 if ((error = st_mount_tape(devvp, flags)) != 0) 626 goto bad; 627 st->last_dsty = dsty; 628 } 629 630 SC_DEBUG(periph, SCSIPI_DB2, ("open complete\n")); 631 return (0); 632 633 bad: 634 st_unmount(st, NOEJECT); 635 scsipi_adapter_delref(adapt); 636 periph->periph_flags &= ~PERIPH_OPEN; 637 return (error); 638 } 639 640 /* 641 * close the device.. only called if we are the LAST 642 * occurence of an open device 643 */ 644 int 645 stclose(devvp, flags, mode, p) 646 struct vnode *devvp; 647 int flags; 648 int mode; 649 struct proc *p; 650 { 651 int stxx, error = 0; 652 struct st_softc *st; 653 struct scsipi_periph *periph; 654 struct scsipi_adapter *adapt; 655 656 st = vdev_privdata(devvp); 657 periph = st->sc_periph; 658 adapt = periph->periph_channel->chan_adapter; 659 660 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("closing\n")); 661 662 /* 663 * Make sure that a tape opened in write-only mode will have 664 * file marks written on it when closed, even if not written to. 665 * 666 * This is for SUN compatibility. Actually, the Sun way of 667 * things is to: 668 * 669 * only write filemarks if there are fmks to be written and 670 * - open for write (possibly read/write) 671 * - the last operation was a write 672 * or: 673 * - opened for wronly 674 * - no data was written (including filemarks) 675 */ 676 677 stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); 678 if (((flags & FWRITE) && stxx == ST_WRITTEN) || 679 ((flags & O_ACCMODE) == FWRITE && stxx == 0)) { 680 int nm; 681 error = st_check_eod(st, FALSE, &nm, 0); 682 } 683 684 switch (STMODE(vdev_rdev(devvp))) { 685 case NORMAL_MODE: 686 st_unmount(st, NOEJECT); 687 break; 688 case NOREW_MODE: 689 case CTRL_MODE: 690 /* 691 * Leave mounted unless media seems to have been removed. 692 * 693 * Otherwise, if we're to terminate a tape with more than one 694 * filemark [ and because we're not rewinding here ], backspace 695 * one filemark so that later appends will see an unbroken 696 * sequence of: 697 * 698 * file - FMK - file - FMK ... file - FMK FMK (EOM) 699 */ 700 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 701 st_unmount(st, NOEJECT); 702 } else if (error == 0) { 703 /* 704 * ST_WRITTEN was preserved from above. 705 * 706 * All we need to know here is: 707 * 708 * Were we writing this tape and was the last 709 * operation a write? 710 * 711 * Are there supposed to be 2FM at EOD? 712 * 713 * If both statements are true, then we backspace 714 * one filemark. 715 */ 716 stxx |= (st->flags & ST_2FM_AT_EOD); 717 if ((flags & FWRITE) != 0 && 718 (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { 719 error = st_space(st, -1, SP_FILEMARKS, 0); 720 } 721 } 722 break; 723 case EJECT_MODE: 724 st_unmount(st, EJECT); 725 break; 726 } 727 728 scsipi_wait_drain(periph); 729 730 scsipi_adapter_delref(adapt); 731 periph->periph_flags &= ~PERIPH_OPEN; 732 733 return (error); 734 } 735 736 /* 737 * Start a new mount session. 738 * Copy in all the default parameters from the selected device mode. 739 * and try guess any that seem to be defaulted. 740 */ 741 int 742 st_mount_tape(devvp, flags) 743 struct vnode *devvp; 744 int flags; 745 { 746 /* int unit; */ 747 u_int dsty; 748 struct st_softc *st; 749 struct scsipi_periph *periph; 750 int error = 0; 751 dev_t rdev; 752 753 st = vdev_privdata(devvp); 754 rdev = vdev_rdev(devvp); 755 756 /* unit = STUNIT(rdev); */ 757 dsty = STDSTY(rdev); 758 periph = st->sc_periph; 759 760 if (st->flags & ST_MOUNTED) 761 return (0); 762 763 SC_DEBUG(periph, SCSIPI_DB1, ("mounting\n ")); 764 st->flags |= ST_NEW_MOUNT; 765 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 766 /* 767 * If the media is new, then make sure we give it a chance to 768 * to do a 'load' instruction. (We assume it is new.) 769 */ 770 if ((error = st_load(st, LD_LOAD, XS_CTL_SILENT)) != 0) 771 return (error); 772 /* 773 * Throw another dummy instruction to catch 774 * 'Unit attention' errors. Many drives give 775 * these after doing a Load instruction (with 776 * the MEDIUM MAY HAVE CHANGED asc/ascq). 777 */ 778 scsipi_test_unit_ready(periph, XS_CTL_SILENT); /* XXX */ 779 780 /* 781 * Some devices can't tell you much until they have been 782 * asked to look at the media. This quirk does this. 783 */ 784 if (st->quirks & ST_Q_SENSE_HELP) 785 if ((error = st_touch_tape(st)) != 0) 786 return (error); 787 /* 788 * Load the physical device parameters 789 * loads: blkmin, blkmax 790 */ 791 if ((error = st->ops(st, ST_OPS_RBL, 0)) != 0) 792 return (error); 793 /* 794 * Load the media dependent parameters 795 * includes: media_blksize,media_density,numblks 796 * As we have a tape in, it should be reflected here. 797 * If not you may need the "quirk" above. 798 */ 799 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 800 return (error); 801 /* 802 * If we have gained a permanent density from somewhere, 803 * then use it in preference to the one supplied by 804 * default by the driver. 805 */ 806 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 807 st->density = st->modes[dsty].density; 808 else 809 st->density = st->media_density; 810 /* 811 * If we have gained a permanent blocksize 812 * then use it in preference to the one supplied by 813 * default by the driver. 814 */ 815 st->flags &= ~ST_FIXEDBLOCKS; 816 if (st->modeflags[dsty] & 817 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 818 st->blksize = st->modes[dsty].blksize; 819 if (st->blksize) 820 st->flags |= ST_FIXEDBLOCKS; 821 } else { 822 if ((error = st_decide_mode(st, FALSE)) != 0) 823 return (error); 824 } 825 if ((error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 826 /* ATAPI will return ENODEV for this, and this may be OK */ 827 if (error != ENODEV) { 828 printf("%s: cannot set selected mode\n", 829 st->sc_dev.dv_xname); 830 return (error); 831 } 832 } 833 if (!(st->quirks & ST_Q_NOPREVENT)) { 834 scsipi_prevent(periph, PR_PREVENT, 835 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 836 } 837 st->flags &= ~ST_NEW_MOUNT; 838 st->flags |= ST_MOUNTED; 839 periph->periph_flags |= PERIPH_MEDIA_LOADED; /* move earlier? */ 840 841 return (0); 842 } 843 844 /* 845 * End the present mount session. 846 * Rewind, and optionally eject the tape. 847 * Reset various flags to indicate that all new 848 * operations require another mount operation 849 */ 850 void 851 st_unmount(st, eject) 852 struct st_softc *st; 853 boolean eject; 854 { 855 struct scsipi_periph *periph = st->sc_periph; 856 int nmarks; 857 858 if ((st->flags & ST_MOUNTED) == 0) 859 return; 860 SC_DEBUG(periph, SCSIPI_DB1, ("unmounting\n")); 861 st_check_eod(st, FALSE, &nmarks, XS_CTL_IGNORE_NOT_READY); 862 st_rewind(st, 0, XS_CTL_IGNORE_NOT_READY); 863 864 /* 865 * Section 9.3.3 of the SCSI specs states that a device shall return 866 * the density value specified in the last succesfull MODE SELECT 867 * after an unload operation, in case it is not able to 868 * automatically determine the density of the new medium. 869 * 870 * So we instruct the device to use the default density, which will 871 * prevent the use of stale density values (in particular, 872 * in st_touch_tape(). 873 */ 874 st->density = 0; 875 if (st->ops(st, ST_OPS_MODESELECT, 0) != 0) { 876 printf("%s: WARNING: cannot revert to default density\n", 877 st->sc_dev.dv_xname); 878 } 879 880 scsipi_prevent(periph, PR_ALLOW, 881 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 882 if (eject) 883 st_load(st, LD_UNLOAD, XS_CTL_IGNORE_NOT_READY); 884 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 885 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 886 } 887 888 /* 889 * Given all we know about the device, media, mode, 'quirks' and 890 * initial operation, make a decision as to how we should be set 891 * to run (regarding blocking and EOD marks) 892 */ 893 int 894 st_decide_mode(st, first_read) 895 struct st_softc *st; 896 boolean first_read; 897 { 898 899 SC_DEBUG(st->sc_periph, SCSIPI_DB2, ("starting block mode decision\n")); 900 901 /* 902 * If the drive can only handle fixed-length blocks and only at 903 * one size, perhaps we should just do that. 904 */ 905 if (st->blkmin && (st->blkmin == st->blkmax)) { 906 st->flags |= ST_FIXEDBLOCKS; 907 st->blksize = st->blkmin; 908 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 909 ("blkmin == blkmax of %d\n", st->blkmin)); 910 goto done; 911 } 912 /* 913 * If the tape density mandates (or even suggests) use of fixed 914 * or variable-length blocks, comply. 915 */ 916 switch (st->density) { 917 case HALFINCH_800: 918 case HALFINCH_1600: 919 case HALFINCH_6250: 920 case DDS: 921 st->flags &= ~ST_FIXEDBLOCKS; 922 st->blksize = 0; 923 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 924 ("density specified variable\n")); 925 goto done; 926 case QIC_11: 927 case QIC_24: 928 case QIC_120: 929 case QIC_150: 930 case QIC_525: 931 case QIC_1320: 932 case QIC_3095: 933 case QIC_3220: 934 st->flags |= ST_FIXEDBLOCKS; 935 if (st->media_blksize > 0) 936 st->blksize = st->media_blksize; 937 else 938 st->blksize = DEF_FIXED_BSIZE; 939 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 940 ("density specified fixed\n")); 941 goto done; 942 } 943 /* 944 * If we're about to read the tape, perhaps we should choose 945 * fixed or variable-length blocks and block size according to 946 * what the drive found on the tape. 947 */ 948 if (first_read && 949 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 950 (st->media_blksize == DEF_FIXED_BSIZE) || 951 (st->media_blksize == 1024))) { 952 if (st->media_blksize > 0) 953 st->flags |= ST_FIXEDBLOCKS; 954 else 955 st->flags &= ~ST_FIXEDBLOCKS; 956 st->blksize = st->media_blksize; 957 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 958 ("Used media_blksize of %d\n", st->media_blksize)); 959 goto done; 960 } 961 /* 962 * We're getting no hints from any direction. Choose variable- 963 * length blocks arbitrarily. 964 */ 965 st->flags &= ~ST_FIXEDBLOCKS; 966 st->blksize = 0; 967 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 968 ("Give up and default to variable mode\n")); 969 970 done: 971 /* 972 * Decide whether or not to write two file marks to signify end- 973 * of-data. Make the decision as a function of density. If 974 * the decision is not to use a second file mark, the SCSI BLANK 975 * CHECK condition code will be recognized as end-of-data when 976 * first read. 977 * (I think this should be a by-product of fixed/variable..julian) 978 */ 979 switch (st->density) { 980 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 981 case QIC_11: 982 case QIC_24: 983 case QIC_120: 984 case QIC_150: 985 case QIC_525: 986 case QIC_1320: 987 case QIC_3095: 988 case QIC_3220: 989 st->flags &= ~ST_2FM_AT_EOD; 990 break; 991 default: 992 st->flags |= ST_2FM_AT_EOD; 993 } 994 return (0); 995 } 996 997 /* 998 * Actually translate the requested transfer into 999 * one the physical driver can understand 1000 * The transfer is described by a buf and will include 1001 * only one physical transfer. 1002 */ 1003 void 1004 ststrategy(bp) 1005 struct buf *bp; 1006 { 1007 struct st_softc *st; 1008 int s; 1009 1010 st = vdev_privdata(bp->b_devvp); 1011 1012 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1013 ("ststrategy %ld bytes @ blk %d\n", bp->b_bcount, bp->b_blkno)); 1014 /* 1015 * If it's a null transfer, return immediatly 1016 */ 1017 if (bp->b_bcount == 0) 1018 goto done; 1019 1020 /* If offset is negative, error */ 1021 if (bp->b_blkno < 0) { 1022 bp->b_error = EINVAL; 1023 goto bad; 1024 } 1025 1026 /* 1027 * Odd sized request on fixed drives are verboten 1028 */ 1029 if (st->flags & ST_FIXEDBLOCKS) { 1030 if (bp->b_bcount % st->blksize) { 1031 printf("%s: bad request, must be multiple of %d\n", 1032 st->sc_dev.dv_xname, st->blksize); 1033 bp->b_error = EIO; 1034 goto bad; 1035 } 1036 } 1037 /* 1038 * as are out-of-range requests on variable drives. 1039 */ 1040 else if (bp->b_bcount < st->blkmin || 1041 (st->blkmax && bp->b_bcount > st->blkmax)) { 1042 printf("%s: bad request, must be between %d and %d\n", 1043 st->sc_dev.dv_xname, st->blkmin, st->blkmax); 1044 bp->b_error = EIO; 1045 goto bad; 1046 } 1047 s = splbio(); 1048 1049 /* 1050 * Place it in the queue of activities for this tape 1051 * at the end (a bit silly because we only have on user.. 1052 * (but it could fork())) 1053 */ 1054 BUFQ_INSERT_TAIL(&st->buf_queue, bp); 1055 1056 /* 1057 * Tell the device to get going on the transfer if it's 1058 * not doing anything, otherwise just wait for completion 1059 * (All a bit silly if we're only allowing 1 open but..) 1060 */ 1061 ststart(st->sc_periph); 1062 1063 splx(s); 1064 return; 1065 bad: 1066 bp->b_flags |= B_ERROR; 1067 done: 1068 /* 1069 * Correctly set the buf to indicate a completed xfer 1070 */ 1071 bp->b_resid = bp->b_bcount; 1072 biodone(bp); 1073 return; 1074 } 1075 1076 /* 1077 * ststart looks to see if there is a buf waiting for the device 1078 * and that the device is not already busy. If both are true, 1079 * It dequeues the buf and creates a scsi command to perform the 1080 * transfer required. The transfer request will call scsipi_done 1081 * on completion, which will in turn call this routine again 1082 * so that the next queued transfer is performed. 1083 * The bufs are queued by the strategy routine (ststrategy) 1084 * 1085 * This routine is also called after other non-queued requests 1086 * have been made of the scsi driver, to ensure that the queue 1087 * continues to be drained. 1088 * ststart() is called at splbio 1089 */ 1090 void 1091 ststart(periph) 1092 struct scsipi_periph *periph; 1093 { 1094 struct st_softc *st = (void *)periph->periph_dev; 1095 struct buf *bp; 1096 struct scsi_rw_tape cmd; 1097 int flags, error; 1098 1099 SC_DEBUG(periph, SCSIPI_DB2, ("ststart ")); 1100 /* 1101 * See if there is a buf to do and we are not already 1102 * doing one 1103 */ 1104 while (periph->periph_active < periph->periph_openings) { 1105 /* if a special awaits, let it proceed first */ 1106 if (periph->periph_flags & PERIPH_WAITING) { 1107 periph->periph_flags &= ~PERIPH_WAITING; 1108 wakeup((caddr_t)periph); 1109 return; 1110 } 1111 1112 if ((bp = BUFQ_FIRST(&st->buf_queue)) == NULL) 1113 return; 1114 BUFQ_REMOVE(&st->buf_queue, bp); 1115 1116 /* 1117 * If the device has been unmounted by the user 1118 * then throw away all requests until done. 1119 */ 1120 if ((st->flags & ST_MOUNTED) == 0 || 1121 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 1122 /* make sure that one implies the other.. */ 1123 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 1124 bp->b_flags |= B_ERROR; 1125 bp->b_error = EIO; 1126 bp->b_resid = bp->b_bcount; 1127 biodone(bp); 1128 continue; 1129 } 1130 /* 1131 * only FIXEDBLOCK devices have pending I/O or space operations. 1132 */ 1133 if (st->flags & ST_FIXEDBLOCKS) { 1134 /* 1135 * If we are at a filemark but have not reported it yet 1136 * then we should report it now 1137 */ 1138 if (st->flags & ST_AT_FILEMARK) { 1139 if ((bp->b_flags & B_READ) == B_WRITE) { 1140 /* 1141 * Handling of ST_AT_FILEMARK in 1142 * st_space will fill in the right file 1143 * mark count. 1144 * Back up over filemark 1145 */ 1146 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1147 bp->b_flags |= B_ERROR; 1148 bp->b_error = EIO; 1149 biodone(bp); 1150 continue; 1151 } 1152 } else { 1153 bp->b_resid = bp->b_bcount; 1154 bp->b_error = 0; 1155 bp->b_flags &= ~B_ERROR; 1156 st->flags &= ~ST_AT_FILEMARK; 1157 biodone(bp); 1158 continue; /* seek more work */ 1159 } 1160 } 1161 } 1162 /* 1163 * If we are at EOM but have not reported it 1164 * yet then we should report it now. 1165 */ 1166 if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { 1167 bp->b_resid = bp->b_bcount; 1168 if (st->flags & ST_EIO_PENDING) { 1169 bp->b_error = EIO; 1170 bp->b_flags |= B_ERROR; 1171 } 1172 st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); 1173 biodone(bp); 1174 continue; /* seek more work */ 1175 } 1176 1177 /* 1178 * Fill out the scsi command 1179 */ 1180 memset(&cmd, 0, sizeof(cmd)); 1181 flags = XS_CTL_NOSLEEP | XS_CTL_ASYNC; 1182 if ((bp->b_flags & B_READ) == B_WRITE) { 1183 cmd.opcode = WRITE; 1184 st->flags &= ~ST_FM_WRITTEN; 1185 flags |= XS_CTL_DATA_OUT; 1186 } else { 1187 cmd.opcode = READ; 1188 flags |= XS_CTL_DATA_IN; 1189 } 1190 1191 /* 1192 * Handle "fixed-block-mode" tape drives by using the 1193 * block count instead of the length. 1194 */ 1195 if (st->flags & ST_FIXEDBLOCKS) { 1196 cmd.byte2 |= SRW_FIXED; 1197 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1198 } else 1199 _lto3b(bp->b_bcount, cmd.len); 1200 1201 /* 1202 * go ask the adapter to do all this for us 1203 */ 1204 error = scsipi_command(periph, 1205 (struct scsipi_generic *)&cmd, sizeof(cmd), 1206 (u_char *)bp->b_data, bp->b_bcount, 1207 0, ST_IO_TIME, bp, flags); 1208 if (error) { 1209 printf("%s: not queued, error %d\n", 1210 st->sc_dev.dv_xname, error); 1211 } 1212 } /* go back and see if we can cram more work in.. */ 1213 } 1214 1215 void 1216 stdone(xs) 1217 struct scsipi_xfer *xs; 1218 { 1219 struct st_softc *st = (void *)xs->xs_periph->periph_dev; 1220 1221 if (xs->bp != NULL) { 1222 if ((xs->bp->b_flags & B_READ) == B_WRITE) { 1223 st->flags |= ST_WRITTEN; 1224 } else { 1225 st->flags &= ~ST_WRITTEN; 1226 } 1227 #if NRND > 0 1228 rnd_add_uint32(&st->rnd_source, xs->bp->b_blkno); 1229 #endif 1230 } 1231 } 1232 1233 int 1234 stread(devvp, uio, iomode) 1235 struct vnode *devvp; 1236 struct uio *uio; 1237 int iomode; 1238 { 1239 struct st_softc *st; 1240 1241 st = vdev_privdata(devvp); 1242 1243 return (physio(ststrategy, NULL, devvp, B_READ, 1244 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1245 } 1246 1247 int 1248 stwrite(devvp, uio, iomode) 1249 struct vnode *devvp; 1250 struct uio *uio; 1251 int iomode; 1252 { 1253 struct st_softc *st; 1254 1255 st = vdev_privdata(devvp); 1256 1257 return (physio(ststrategy, NULL, devvp, B_WRITE, 1258 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1259 } 1260 1261 /* 1262 * Perform special action on behalf of the user; 1263 * knows about the internals of this device 1264 */ 1265 int 1266 stioctl(devvp, cmd, arg, flag, p) 1267 struct vnode *devvp; 1268 u_long cmd; 1269 caddr_t arg; 1270 int flag; 1271 struct proc *p; 1272 { 1273 int error = 0; 1274 int unit; 1275 int number, nmarks, dsty; 1276 int flags; 1277 struct st_softc *st; 1278 int hold_blksize; 1279 u_int8_t hold_density; 1280 struct mtop *mt = (struct mtop *) arg; 1281 dev_t rdev; 1282 1283 rdev = vdev_rdev(devvp); 1284 st = vdev_privdata(devvp); 1285 1286 /* 1287 * Find the device that the user is talking about 1288 */ 1289 flags = 0; /* give error messages, act on errors etc. */ 1290 unit = STUNIT(rdev); 1291 dsty = STDSTY(rdev); 1292 hold_blksize = st->blksize; 1293 hold_density = st->density; 1294 1295 switch ((u_int) cmd) { 1296 1297 case MTIOCGET: { 1298 struct mtget *g = (struct mtget *) arg; 1299 /* 1300 * (to get the current state of READONLY) 1301 */ 1302 error = st->ops(st, ST_OPS_MODESENSE, XS_CTL_SILENT); 1303 if (error) { 1304 /* 1305 * Ignore the error if in control mode; 1306 * this is mandated by st(4). 1307 */ 1308 if (STMODE(rdev) != CTRL_MODE) 1309 break; 1310 error = 0; 1311 } 1312 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("[ioctl: get status]\n")); 1313 memset(g, 0, sizeof(struct mtget)); 1314 g->mt_type = 0x7; /* Ultrix compat *//*? */ 1315 g->mt_blksiz = st->blksize; 1316 g->mt_density = st->density; 1317 g->mt_mblksiz[0] = st->modes[0].blksize; 1318 g->mt_mblksiz[1] = st->modes[1].blksize; 1319 g->mt_mblksiz[2] = st->modes[2].blksize; 1320 g->mt_mblksiz[3] = st->modes[3].blksize; 1321 g->mt_mdensity[0] = st->modes[0].density; 1322 g->mt_mdensity[1] = st->modes[1].density; 1323 g->mt_mdensity[2] = st->modes[2].density; 1324 g->mt_mdensity[3] = st->modes[3].density; 1325 if (st->flags & ST_READONLY) 1326 g->mt_dsreg |= MT_DS_RDONLY; 1327 if (st->flags & ST_MOUNTED) 1328 g->mt_dsreg |= MT_DS_MOUNTED; 1329 g->mt_resid = st->mt_resid; 1330 g->mt_erreg = st->mt_erreg; 1331 /* 1332 * clear latched errors. 1333 */ 1334 st->mt_resid = 0; 1335 st->mt_erreg = 0; 1336 st->asc = 0; 1337 st->ascq = 0; 1338 break; 1339 } 1340 case MTIOCTOP: { 1341 1342 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1343 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1344 mt->mt_count)); 1345 1346 /* compat: in U*x it is a short */ 1347 number = mt->mt_count; 1348 switch ((short) (mt->mt_op)) { 1349 case MTWEOF: /* write an end-of-file record */ 1350 error = st_write_filemarks(st, number, flags); 1351 break; 1352 case MTBSF: /* backward space file */ 1353 number = -number; 1354 case MTFSF: /* forward space file */ 1355 error = st_check_eod(st, FALSE, &nmarks, flags); 1356 if (!error) 1357 error = st_space(st, number - nmarks, 1358 SP_FILEMARKS, flags); 1359 break; 1360 case MTBSR: /* backward space record */ 1361 number = -number; 1362 case MTFSR: /* forward space record */ 1363 error = st_check_eod(st, TRUE, &nmarks, flags); 1364 if (!error) 1365 error = st_space(st, number, SP_BLKS, flags); 1366 break; 1367 case MTREW: /* rewind */ 1368 error = st_rewind(st, 0, flags); 1369 break; 1370 case MTOFFL: /* rewind and put the drive offline */ 1371 st_unmount(st, EJECT); 1372 break; 1373 case MTNOP: /* no operation, sets status only */ 1374 break; 1375 case MTRETEN: /* retension the tape */ 1376 error = st_load(st, LD_RETENSION, flags); 1377 if (!error) 1378 error = st_load(st, LD_LOAD, flags); 1379 break; 1380 case MTEOM: /* forward space to end of media */ 1381 error = st_check_eod(st, FALSE, &nmarks, flags); 1382 if (!error) 1383 error = st_space(st, 1, SP_EOM, flags); 1384 break; 1385 case MTCACHE: /* enable controller cache */ 1386 st->flags &= ~ST_DONTBUFFER; 1387 goto try_new_value; 1388 case MTNOCACHE: /* disable controller cache */ 1389 st->flags |= ST_DONTBUFFER; 1390 goto try_new_value; 1391 case MTERASE: /* erase volume */ 1392 error = st_erase(st, number, flags); 1393 break; 1394 case MTSETBSIZ: /* Set block size for device */ 1395 #ifdef NOTYET 1396 if (!(st->flags & ST_NEW_MOUNT)) { 1397 uprintf("re-mount tape before changing blocksize"); 1398 error = EINVAL; 1399 break; 1400 } 1401 #endif 1402 if (number == 0) 1403 st->flags &= ~ST_FIXEDBLOCKS; 1404 else { 1405 if ((st->blkmin || st->blkmax) && 1406 (number < st->blkmin || 1407 number > st->blkmax)) { 1408 error = EINVAL; 1409 break; 1410 } 1411 st->flags |= ST_FIXEDBLOCKS; 1412 } 1413 st->blksize = number; 1414 st->flags |= ST_BLOCK_SET; /*XXX */ 1415 goto try_new_value; 1416 1417 case MTSETDNSTY: /* Set density for device and mode */ 1418 /* 1419 * Any number >= 0 and <= 0xff is legal. Numbers 1420 * above 0x80 are 'vendor unique'. 1421 */ 1422 if (number < 0 || number > 255) { 1423 error = EINVAL; 1424 break; 1425 } else 1426 st->density = number; 1427 goto try_new_value; 1428 1429 case MTCMPRESS: 1430 error = st->ops(st, (number == 0) ? 1431 ST_OPS_CMPRSS_OFF : ST_OPS_CMPRSS_ON, 1432 XS_CTL_SILENT); 1433 break; 1434 1435 case MTEWARN: 1436 if (number) 1437 st->flags |= ST_EARLYWARN; 1438 else 1439 st->flags &= ~ST_EARLYWARN; 1440 break; 1441 1442 default: 1443 error = EINVAL; 1444 } 1445 break; 1446 } 1447 case MTIOCIEOT: 1448 case MTIOCEEOT: 1449 break; 1450 1451 case MTIOCRDSPOS: 1452 error = st_rdpos(st, 0, (u_int32_t *) arg); 1453 break; 1454 1455 case MTIOCRDHPOS: 1456 error = st_rdpos(st, 1, (u_int32_t *) arg); 1457 break; 1458 1459 case MTIOCSLOCATE: 1460 error = st_setpos(st, 0, (u_int32_t *) arg); 1461 break; 1462 1463 case MTIOCHLOCATE: 1464 error = st_setpos(st, 1, (u_int32_t *) arg); 1465 break; 1466 1467 1468 default: 1469 error = scsipi_do_ioctl(st->sc_periph, devvp, cmd, arg, 1470 flag, p); 1471 break; 1472 } 1473 return (error); 1474 /*-----------------------------*/ 1475 try_new_value: 1476 /* 1477 * Check that the mode being asked for is aggreeable to the 1478 * drive. If not, put it back the way it was. 1479 * 1480 * If in control mode, we can make (persistent) mode changes 1481 * even if no medium is loaded (see st(4)). 1482 */ 1483 if ((STMODE(rdev) != CTRL_MODE || 1484 (st->flags & ST_MOUNTED) != 0) && 1485 (error = st->ops(st, ST_OPS_MODESELECT, 0)) != 0) { 1486 /* put it back as it was */ 1487 printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); 1488 st->density = hold_density; 1489 st->blksize = hold_blksize; 1490 if (st->blksize) 1491 st->flags |= ST_FIXEDBLOCKS; 1492 else 1493 st->flags &= ~ST_FIXEDBLOCKS; 1494 return (error); 1495 } 1496 /* 1497 * As the drive liked it, if we are setting a new default, 1498 * set it into the structures as such. 1499 * 1500 * The means for deciding this are not finalised yet- but 1501 * if the device was opened in Control Mode, the values 1502 * are persistent now across mounts. 1503 */ 1504 if (STMODE(rdev) == CTRL_MODE) { 1505 switch ((short) (mt->mt_op)) { 1506 case MTSETBSIZ: 1507 st->modes[dsty].blksize = st->blksize; 1508 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1509 break; 1510 case MTSETDNSTY: 1511 st->modes[dsty].density = st->density; 1512 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1513 break; 1514 } 1515 } 1516 return (0); 1517 } 1518 1519 /* 1520 * Do a synchronous read. 1521 */ 1522 int 1523 st_read(st, buf, size, flags) 1524 struct st_softc *st; 1525 int size; 1526 int flags; 1527 char *buf; 1528 { 1529 struct scsi_rw_tape cmd; 1530 1531 /* 1532 * If it's a null transfer, return immediatly 1533 */ 1534 if (size == 0) 1535 return (0); 1536 memset(&cmd, 0, sizeof(cmd)); 1537 cmd.opcode = READ; 1538 if (st->flags & ST_FIXEDBLOCKS) { 1539 cmd.byte2 |= SRW_FIXED; 1540 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1541 cmd.len); 1542 } else 1543 _lto3b(size, cmd.len); 1544 return (scsipi_command(st->sc_periph, 1545 (struct scsipi_generic *)&cmd, sizeof(cmd), 1546 (u_char *)buf, size, 0, ST_IO_TIME, NULL, flags | XS_CTL_DATA_IN)); 1547 } 1548 1549 /* 1550 * issue an erase command 1551 */ 1552 int 1553 st_erase(st, full, flags) 1554 struct st_softc *st; 1555 int full, flags; 1556 { 1557 int tmo; 1558 struct scsi_erase cmd; 1559 1560 /* 1561 * Full erase means set LONG bit in erase command, which asks 1562 * the drive to erase the entire unit. Without this bit, we're 1563 * asking the drive to write an erase gap. 1564 */ 1565 memset(&cmd, 0, sizeof(cmd)); 1566 cmd.opcode = ERASE; 1567 if (full) { 1568 cmd.byte2 = SE_LONG; 1569 tmo = ST_SPC_TIME; 1570 } else { 1571 tmo = ST_IO_TIME; 1572 } 1573 1574 /* 1575 * XXX We always do this asynchronously, for now, unless the device 1576 * has the ST_Q_ERASE_NOIMM quirk. How long should we wait if we 1577 * want to (eventually) to it synchronously? 1578 */ 1579 if ((st->quirks & ST_Q_ERASE_NOIMM) == 0) 1580 cmd.byte2 |= SE_IMMED; 1581 1582 return (scsipi_command(st->sc_periph, 1583 (struct scsipi_generic *)&cmd, sizeof(cmd), 1584 0, 0, ST_RETRIES, tmo, NULL, flags)); 1585 } 1586 1587 /* 1588 * skip N blocks/filemarks/seq filemarks/eom 1589 */ 1590 int 1591 st_space(st, number, what, flags) 1592 struct st_softc *st; 1593 u_int what; 1594 int flags; 1595 int number; 1596 { 1597 struct scsi_space cmd; 1598 int error; 1599 1600 switch (what) { 1601 case SP_BLKS: 1602 if (st->flags & ST_PER_ACTION) { 1603 if (number > 0) { 1604 st->flags &= ~ST_PER_ACTION; 1605 return (EIO); 1606 } else if (number < 0) { 1607 if (st->flags & ST_AT_FILEMARK) { 1608 /* 1609 * Handling of ST_AT_FILEMARK 1610 * in st_space will fill in the 1611 * right file mark count. 1612 */ 1613 error = st_space(st, 0, SP_FILEMARKS, 1614 flags); 1615 if (error) 1616 return (error); 1617 } 1618 if (st->flags & ST_BLANK_READ) { 1619 st->flags &= ~ST_BLANK_READ; 1620 return (EIO); 1621 } 1622 st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); 1623 } 1624 } 1625 break; 1626 case SP_FILEMARKS: 1627 if (st->flags & ST_EIO_PENDING) { 1628 if (number > 0) { 1629 /* pretend we just discovered the error */ 1630 st->flags &= ~ST_EIO_PENDING; 1631 return (EIO); 1632 } else if (number < 0) { 1633 /* back away from the error */ 1634 st->flags &= ~ST_EIO_PENDING; 1635 } 1636 } 1637 if (st->flags & ST_AT_FILEMARK) { 1638 st->flags &= ~ST_AT_FILEMARK; 1639 number--; 1640 } 1641 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 1642 /* back away from unwritten tape */ 1643 st->flags &= ~ST_BLANK_READ; 1644 number++; /* XXX dubious */ 1645 } 1646 break; 1647 case SP_EOM: 1648 if (st->flags & ST_EOM_PENDING) { 1649 /* we're already there */ 1650 st->flags &= ~ST_EOM_PENDING; 1651 return (0); 1652 } 1653 if (st->flags & ST_EIO_PENDING) { 1654 /* pretend we just discovered the error */ 1655 st->flags &= ~ST_EIO_PENDING; 1656 return (EIO); 1657 } 1658 if (st->flags & ST_AT_FILEMARK) 1659 st->flags &= ~ST_AT_FILEMARK; 1660 break; 1661 } 1662 if (number == 0) 1663 return (0); 1664 1665 memset(&cmd, 0, sizeof(cmd)); 1666 cmd.opcode = SPACE; 1667 cmd.byte2 = what; 1668 _lto3b(number, cmd.number); 1669 1670 return (scsipi_command(st->sc_periph, 1671 (struct scsipi_generic *)&cmd, sizeof(cmd), 1672 0, 0, 0, ST_SPC_TIME, NULL, flags)); 1673 } 1674 1675 /* 1676 * write N filemarks 1677 */ 1678 int 1679 st_write_filemarks(st, number, flags) 1680 struct st_softc *st; 1681 int flags; 1682 int number; 1683 { 1684 struct scsi_write_filemarks cmd; 1685 1686 /* 1687 * It's hard to write a negative number of file marks. 1688 * Don't try. 1689 */ 1690 if (number < 0) 1691 return (EINVAL); 1692 switch (number) { 1693 case 0: /* really a command to sync the drive's buffers */ 1694 break; 1695 case 1: 1696 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 1697 st->flags &= ~ST_WRITTEN; 1698 else 1699 st->flags |= ST_FM_WRITTEN; 1700 st->flags &= ~ST_PER_ACTION; 1701 break; 1702 default: 1703 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 1704 } 1705 1706 memset(&cmd, 0, sizeof(cmd)); 1707 cmd.opcode = WRITE_FILEMARKS; 1708 _lto3b(number, cmd.number); 1709 1710 return (scsipi_command(st->sc_periph, 1711 (struct scsipi_generic *)&cmd, sizeof(cmd), 1712 0, 0, 0, ST_IO_TIME * 4, NULL, flags)); 1713 } 1714 1715 /* 1716 * Make sure the right number of file marks is on tape if the 1717 * tape has been written. If the position argument is true, 1718 * leave the tape positioned where it was originally. 1719 * 1720 * nmarks returns the number of marks to skip (or, if position 1721 * true, which were skipped) to get back original position. 1722 */ 1723 int 1724 st_check_eod(st, position, nmarks, flags) 1725 struct st_softc *st; 1726 boolean position; 1727 int *nmarks; 1728 int flags; 1729 { 1730 int error; 1731 1732 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 1733 default: 1734 *nmarks = 0; 1735 return (0); 1736 case ST_WRITTEN: 1737 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 1738 *nmarks = 1; 1739 break; 1740 case ST_WRITTEN | ST_2FM_AT_EOD: 1741 *nmarks = 2; 1742 } 1743 error = st_write_filemarks(st, *nmarks, flags); 1744 if (position && !error) 1745 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 1746 return (error); 1747 } 1748 1749 /* 1750 * load/unload/retension 1751 */ 1752 int 1753 st_load(st, type, flags) 1754 struct st_softc *st; 1755 u_int type; 1756 int flags; 1757 { 1758 int error; 1759 struct scsi_load cmd; 1760 1761 if (type != LD_LOAD) { 1762 int nmarks; 1763 1764 error = st_check_eod(st, FALSE, &nmarks, flags); 1765 if (error) { 1766 printf("%s: failed to write closing filemarks at " 1767 "unload, errno=%d\n", st->sc_dev.dv_xname, error); 1768 return (error); 1769 } 1770 } 1771 if (st->quirks & ST_Q_IGNORE_LOADS) { 1772 if (type == LD_LOAD) { 1773 /* 1774 * If we ignore loads, at least we should try a rewind. 1775 */ 1776 return st_rewind(st, 0, flags); 1777 } 1778 /* otherwise, we should do what's asked of us */ 1779 } 1780 1781 memset(&cmd, 0, sizeof(cmd)); 1782 cmd.opcode = LOAD; 1783 cmd.how = type; 1784 1785 error = scsipi_command(st->sc_periph, 1786 (struct scsipi_generic *)&cmd, sizeof(cmd), 1787 0, 0, ST_RETRIES, ST_SPC_TIME, NULL, flags); 1788 if (error) { 1789 printf("%s: error %d in st_load (op %d)\n", 1790 st->sc_dev.dv_xname, error, type); 1791 } 1792 return (error); 1793 } 1794 1795 /* 1796 * Rewind the device 1797 */ 1798 int 1799 st_rewind(st, immediate, flags) 1800 struct st_softc *st; 1801 u_int immediate; 1802 int flags; 1803 { 1804 struct scsi_rewind cmd; 1805 int error; 1806 int nmarks; 1807 1808 error = st_check_eod(st, FALSE, &nmarks, flags); 1809 if (error) { 1810 printf("%s: failed to write closing filemarks at " 1811 "rewind, errno=%d\n", st->sc_dev.dv_xname, error); 1812 return (error); 1813 } 1814 st->flags &= ~ST_PER_ACTION; 1815 1816 /* 1817 * ATAPI tapes always need foo to be set 1818 */ 1819 if (scsipi_periph_bustype(st->sc_periph) == SCSIPI_BUSTYPE_ATAPI) 1820 immediate = SR_IMMED; 1821 1822 memset(&cmd, 0, sizeof(cmd)); 1823 cmd.opcode = REWIND; 1824 cmd.byte2 = immediate; 1825 1826 error = scsipi_command(st->sc_periph, 1827 (struct scsipi_generic *)&cmd, sizeof(cmd), 0, 0, ST_RETRIES, 1828 immediate ? ST_CTL_TIME: ST_SPC_TIME, NULL, flags); 1829 if (error) { 1830 printf("%s: error %d trying to rewind\n", 1831 st->sc_dev.dv_xname, error); 1832 } 1833 return (error); 1834 } 1835 1836 int 1837 st_rdpos(st, hard, blkptr) 1838 struct st_softc *st; 1839 int hard; 1840 u_int32_t *blkptr; 1841 { 1842 int error; 1843 u_int8_t posdata[20]; 1844 struct scsi_tape_read_position cmd; 1845 1846 /* 1847 * First flush any pending writes... 1848 */ 1849 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 1850 1851 /* 1852 * The latter case is for 'write protected' tapes 1853 * which are too stupid to recognize a zero count 1854 * for writing filemarks as a no-op. 1855 */ 1856 if (error != 0 && error != EACCES && error != EROFS) 1857 return (error); 1858 1859 memset(&cmd, 0, sizeof(cmd)); 1860 memset(&posdata, 0, sizeof(posdata)); 1861 cmd.opcode = READ_POSITION; 1862 if (hard) 1863 cmd.byte1 = 1; 1864 1865 error = scsipi_command(st->sc_periph, 1866 (struct scsipi_generic *)&cmd, sizeof(cmd), (u_char *)&posdata, 1867 sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, 1868 XS_CTL_SILENT | XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); 1869 1870 if (error == 0) { 1871 #if 0 1872 printf("posdata:"); 1873 for (hard = 0; hard < sizeof(posdata); hard++) 1874 printf("%02x ", posdata[hard] & 0xff); 1875 printf("\n"); 1876 #endif 1877 if (posdata[0] & 0x4) /* Block Position Unknown */ 1878 error = EINVAL; 1879 else 1880 *blkptr = _4btol(&posdata[4]); 1881 } 1882 return (error); 1883 } 1884 1885 int 1886 st_setpos(st, hard, blkptr) 1887 struct st_softc *st; 1888 int hard; 1889 u_int32_t *blkptr; 1890 { 1891 int error; 1892 struct scsi_tape_locate cmd; 1893 1894 /* 1895 * First flush any pending writes. Strictly speaking, 1896 * we're not supposed to have to worry about this, 1897 * but let's be untrusting. 1898 */ 1899 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 1900 1901 /* 1902 * The latter case is for 'write protected' tapes 1903 * which are too stupid to recognize a zero count 1904 * for writing filemarks as a no-op. 1905 */ 1906 if (error != 0 && error != EACCES && error != EROFS) 1907 return (error); 1908 1909 memset(&cmd, 0, sizeof(cmd)); 1910 cmd.opcode = LOCATE; 1911 if (hard) 1912 cmd.byte2 = 1 << 2; 1913 _lto4b(*blkptr, cmd.blkaddr); 1914 error = scsipi_command(st->sc_periph, 1915 (struct scsipi_generic *)&cmd, sizeof(cmd), 1916 NULL, 0, ST_RETRIES, ST_SPC_TIME, NULL, 0); 1917 /* 1918 * XXX: Note file && block number position now unknown (if 1919 * XXX: these things ever start being maintained in this driver) 1920 */ 1921 return (error); 1922 } 1923 1924 1925 /* 1926 * Look at the returned sense and act on the error and determine 1927 * the unix error number to pass back..., 0 (== report no error), 1928 * -1 = retry the operation, -2 continue error processing. 1929 */ 1930 int 1931 st_interpret_sense(xs) 1932 struct scsipi_xfer *xs; 1933 { 1934 struct scsipi_periph *periph = xs->xs_periph; 1935 struct scsipi_sense_data *sense = &xs->sense.scsi_sense; 1936 struct buf *bp = xs->bp; 1937 struct st_softc *st = (void *)periph->periph_dev; 1938 int retval = EJUSTRETURN; 1939 int doprint = ((xs->xs_control & XS_CTL_SILENT) == 0); 1940 u_int8_t key; 1941 int32_t info; 1942 1943 /* 1944 * If it isn't a extended or extended/deferred error, let 1945 * the generic code handle it. 1946 */ 1947 if ((sense->error_code & SSD_ERRCODE) != 0x70 && 1948 (sense->error_code & SSD_ERRCODE) != 0x71) { /* DEFFERRED */ 1949 return (retval); 1950 } 1951 1952 if (sense->error_code & SSD_ERRCODE_VALID) 1953 info = _4btol(sense->info); 1954 else 1955 info = xs->datalen; /* bad choice if fixed blocks */ 1956 key = sense->flags & SSD_KEY; 1957 st->mt_erreg = key; 1958 st->asc = sense->add_sense_code; 1959 st->ascq = sense->add_sense_code_qual; 1960 st->mt_resid = (short) info; 1961 1962 /* 1963 * If the device is not open yet, let generic handle 1964 */ 1965 if ((periph->periph_flags & PERIPH_OPEN) == 0) { 1966 return (retval); 1967 } 1968 1969 1970 if (st->flags & ST_FIXEDBLOCKS) { 1971 xs->resid = info * st->blksize; 1972 if (sense->flags & SSD_EOM) { 1973 if ((st->flags & ST_EARLYWARN) == 0) 1974 st->flags |= ST_EIO_PENDING; 1975 st->flags |= ST_EOM_PENDING; 1976 if (bp) 1977 bp->b_resid = xs->resid; 1978 } 1979 if (sense->flags & SSD_FILEMARK) { 1980 st->flags |= ST_AT_FILEMARK; 1981 if (bp) 1982 bp->b_resid = xs->resid; 1983 } 1984 if (sense->flags & SSD_ILI) { 1985 st->flags |= ST_EIO_PENDING; 1986 if (bp) 1987 bp->b_resid = xs->resid; 1988 if (sense->error_code & SSD_ERRCODE_VALID && 1989 (xs->xs_control & XS_CTL_SILENT) == 0) 1990 printf("%s: block wrong size, %d blocks " 1991 "residual\n", st->sc_dev.dv_xname, info); 1992 1993 /* 1994 * This quirk code helps the drive read 1995 * the first tape block, regardless of 1996 * format. That is required for these 1997 * drives to return proper MODE SENSE 1998 * information. 1999 */ 2000 if ((st->quirks & ST_Q_SENSE_HELP) && 2001 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 2002 st->blksize -= 512; 2003 } 2004 /* 2005 * If data wanted and no data was transferred, do it immediately 2006 */ 2007 if (xs->datalen && xs->resid >= xs->datalen) { 2008 if (st->flags & ST_EIO_PENDING) 2009 return (EIO); 2010 if (st->flags & ST_AT_FILEMARK) { 2011 if (bp) 2012 bp->b_resid = xs->resid; 2013 return (0); 2014 } 2015 } 2016 } else { /* must be variable mode */ 2017 if (sense->flags & SSD_EOM) { 2018 /* 2019 * The current semantics of this 2020 * driver requires EOM detection 2021 * to return EIO unless early 2022 * warning detection is enabled 2023 * for variable mode (this is always 2024 * on for fixed block mode). 2025 */ 2026 if (st->flags & ST_EARLYWARN) { 2027 st->flags |= ST_EOM_PENDING; 2028 retval = 0; 2029 } else { 2030 retval = EIO; 2031 } 2032 2033 /* 2034 * If it's an unadorned EOM detection, 2035 * suppress printing an error. 2036 */ 2037 if (key == SKEY_NO_SENSE) { 2038 doprint = 0; 2039 } 2040 } else if (sense->flags & SSD_FILEMARK) { 2041 retval = 0; 2042 } else if (sense->flags & SSD_ILI) { 2043 if (info < 0) { 2044 /* 2045 * The tape record was bigger than the read 2046 * we issued. 2047 */ 2048 if ((xs->xs_control & XS_CTL_SILENT) == 0) { 2049 printf("%s: %d-byte tape record too big" 2050 " for %d-byte user buffer\n", 2051 st->sc_dev.dv_xname, 2052 xs->datalen - info, xs->datalen); 2053 } 2054 retval = EIO; 2055 } else { 2056 retval = 0; 2057 } 2058 } 2059 xs->resid = info; 2060 if (bp) 2061 bp->b_resid = info; 2062 } 2063 2064 #ifndef SCSIPI_DEBUG 2065 if (retval == 0 && key == SKEY_NO_SENSE) 2066 doprint = 0; 2067 #endif 2068 if (key == SKEY_BLANK_CHECK) { 2069 /* 2070 * This quirk code helps the drive read the 2071 * first tape block, regardless of format. That 2072 * is required for these drives to return proper 2073 * MODE SENSE information. 2074 */ 2075 if ((st->quirks & ST_Q_SENSE_HELP) && 2076 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 2077 /* still starting */ 2078 st->blksize -= 512; 2079 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 2080 st->flags |= ST_BLANK_READ; 2081 xs->resid = xs->datalen; 2082 if (bp) { 2083 bp->b_resid = xs->resid; 2084 /* return an EOF */ 2085 } 2086 retval = 0; 2087 } 2088 } 2089 2090 /* 2091 * If generic sense processing will continue, we should not 2092 * print sense info here. 2093 */ 2094 if (retval == EJUSTRETURN) 2095 doprint = 0; 2096 2097 if (doprint) { 2098 #ifdef SCSIVERBOSE 2099 scsipi_print_sense(xs, 0); 2100 #else 2101 scsipi_printaddr(periph); 2102 printf("Sense Key 0x%02x", key); 2103 if ((sense->error_code & SSD_ERRCODE_VALID) != 0) { 2104 switch (key) { 2105 case SKEY_NOT_READY: 2106 case SKEY_ILLEGAL_REQUEST: 2107 case SKEY_UNIT_ATTENTION: 2108 case SKEY_WRITE_PROTECT: 2109 break; 2110 case SKEY_BLANK_CHECK: 2111 printf(", requested size: %d (decimal)", info); 2112 break; 2113 case SKEY_ABORTED_COMMAND: 2114 if (xs->xs_retries) 2115 printf(", retrying"); 2116 printf(", cmd 0x%x, info 0x%x", 2117 xs->cmd->opcode, info); 2118 break; 2119 default: 2120 printf(", info = %d (decimal)", info); 2121 } 2122 } 2123 if (sense->extra_len != 0) { 2124 int n; 2125 printf(", data ="); 2126 for (n = 0; n < sense->extra_len; n++) 2127 printf(" %02x", sense->cmd_spec_info[n]); 2128 } 2129 printf("\n"); 2130 #endif 2131 } 2132 return (retval); 2133 } 2134 2135 /* 2136 * The quirk here is that the drive returns some value to st_mode_sense 2137 * incorrectly until the tape has actually passed by the head. 2138 * 2139 * The method is to set the drive to large fixed-block state (user-specified 2140 * density and 1024-byte blocks), then read and rewind to get it to sense the 2141 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 2142 * work, as a last resort, try variable- length blocks. The result will be 2143 * the ability to do an accurate st_mode_sense. 2144 * 2145 * We know we can do a rewind because we just did a load, which implies rewind. 2146 * Rewind seems preferable to space backward if we have a virgin tape. 2147 * 2148 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 2149 * error processing, both part of st_interpret_sense. 2150 */ 2151 int 2152 st_touch_tape(st) 2153 struct st_softc *st; 2154 { 2155 char *buf; 2156 int readsize; 2157 int error; 2158 2159 buf = malloc(1024, M_TEMP, M_NOWAIT); 2160 if (buf == NULL) 2161 return (ENOMEM); 2162 2163 if ((error = st->ops(st, ST_OPS_MODESENSE, 0)) != 0) 2164 goto bad; 2165 2166 /* 2167 * If the block size is already known from the 2168 * sense data, use it. Else start probing at 1024. 2169 */ 2170 if (st->media_blksize > 0) 2171 st->blksize = st->media_blksize; 2172 else 2173 st->blksize = 1024; 2174 2175 do { 2176 switch (st->blksize) { 2177 case 512: 2178 case 1024: 2179 readsize = st->blksize; 2180 st->flags |= ST_FIXEDBLOCKS; 2181 break; 2182 default: 2183 readsize = 1; 2184 st->flags &= ~ST_FIXEDBLOCKS; 2185 } 2186 if ((error = st->ops(st, ST_OPS_MODESELECT, XS_CTL_SILENT)) 2187 != 0) { 2188 /* 2189 * The device did not agree with the proposed 2190 * block size. If we exhausted our options, 2191 * return failure, else try another. 2192 */ 2193 if (readsize == 1) 2194 goto bad; 2195 st->blksize -= 512; 2196 continue; 2197 } 2198 st_read(st, buf, readsize, XS_CTL_SILENT); /* XXX */ 2199 if ((error = st_rewind(st, 0, 0)) != 0) { 2200 bad: free(buf, M_TEMP); 2201 return (error); 2202 } 2203 } while (readsize != 1 && readsize > st->blksize); 2204 2205 free(buf, M_TEMP); 2206 return (0); 2207 } 2208 2209 int 2210 stdump(dev, blkno, va, size) 2211 dev_t dev; 2212 daddr_t blkno; 2213 caddr_t va; 2214 size_t size; 2215 { 2216 2217 /* Not implemented. */ 2218 return (ENXIO); 2219 } 2220
Indexes created Fri Sep 26 20:09:58 GMT 2025