st.c revision 1.87
1 /* $NetBSD: st.c,v 1.87 1998/01/12 09:49:18 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1994 Charles Hannum. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Charles Hannum. 17 * 4. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Originally written by Julian Elischer (julian (at) tfs.com) 34 * for TRW Financial Systems for use under the MACH(2.5) operating system. 35 * 36 * TRW Financial Systems, in accordance with their agreement with Carnegie 37 * Mellon University, makes this software available to CMU to distribute 38 * or use in any manner that they see fit as long as this message is kept with 39 * the software. For this reason TFS also grants any other persons or 40 * organisations permission to use or modify this software. 41 * 42 * TFS supplies this software to be publicly redistributed 43 * on the understanding that TFS is not responsible for the correct 44 * functioning of this software in any circumstances. 45 * 46 * Ported to run under 386BSD by Julian Elischer (julian (at) tfs.com) Sept 1992 47 * major changes by Julian Elischer (julian (at) jules.dialix.oz.au) May 1993 48 */ 49 50 /* 51 * To do: 52 * work out some better way of guessing what a good timeout is going 53 * to be depending on whether we expect to retension or not. 54 */ 55 56 #include "opt_scsiverbose.h" 57 #include "rnd.h" 58 59 #include <sys/types.h> 60 #include <sys/param.h> 61 #include <sys/systm.h> 62 #include <sys/fcntl.h> 63 #include <sys/errno.h> 64 #include <sys/ioctl.h> 65 #include <sys/malloc.h> 66 #include <sys/buf.h> 67 #include <sys/proc.h> 68 #include <sys/user.h> 69 #include <sys/mtio.h> 70 #include <sys/device.h> 71 #include <sys/conf.h> 72 #if NRND > 0 73 #include <sys/rnd.h> 74 #endif 75 76 #include <dev/scsipi/scsi_all.h> 77 #include <dev/scsipi/scsipi_all.h> 78 #include <dev/scsipi/scsi_all.h> 79 #include <dev/scsipi/scsi_tape.h> 80 #include <dev/scsipi/scsiconf.h> 81 82 /* Defines for device specific stuff */ 83 #define DEF_FIXED_BSIZE 512 84 #define ST_RETRIES 4 /* only on non IO commands */ 85 86 #define STMODE(z) ( minor(z) & 0x03) 87 #define STDSTY(z) ((minor(z) >> 2) & 0x03) 88 #define STUNIT(z) ((minor(z) >> 4) ) 89 #define CTLMODE 3 90 91 #define FALSE 0 92 #define TRUE 1 93 94 /* 95 * Maximum density code known. 96 */ 97 #define SCSI_2_MAX_DENSITY_CODE 0x45 98 99 /* 100 * Define various devices that we know mis-behave in some way, 101 * and note how they are bad, so we can correct for them 102 */ 103 struct modes { 104 u_int quirks; /* same definitions as in quirkdata */ 105 int blksize; 106 u_int8_t density; 107 }; 108 109 struct quirkdata { 110 u_int quirks; 111 #define ST_Q_FORCE_BLKSIZE 0x0001 112 #define ST_Q_SENSE_HELP 0x0002 /* must do READ for good MODE SENSE */ 113 #define ST_Q_IGNORE_LOADS 0x0004 114 #define ST_Q_BLKSIZE 0x0008 /* variable-block media_blksize > 0 */ 115 #define ST_Q_UNIMODAL 0x0010 /* unimode drive rejects mode select */ 116 u_int page_0_size; 117 #define MAX_PAGE_0_SIZE 64 118 struct modes modes[4]; 119 }; 120 121 struct st_quirk_inquiry_pattern { 122 struct scsipi_inquiry_pattern pattern; 123 struct quirkdata quirkdata; 124 }; 125 126 struct st_quirk_inquiry_pattern st_quirk_patterns[] = { 127 {{T_SEQUENTIAL, T_REMOV, 128 " ", " ", " "}, {0, 0, { 129 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 130 {ST_Q_FORCE_BLKSIZE, 512, QIC_24}, /* minor 4-7 */ 131 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_1600}, /* minor 8-11 */ 132 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_6250} /* minor 12-15 */ 133 }}}, 134 {{T_SEQUENTIAL, T_REMOV, 135 "TANDBERG", " TDC 3600 ", ""}, {0, 12, { 136 {0, 0, 0}, /* minor 0-3 */ 137 {ST_Q_FORCE_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 138 {0, 0, QIC_150}, /* minor 8-11 */ 139 {0, 0, QIC_120} /* minor 12-15 */ 140 }}}, 141 {{T_SEQUENTIAL, T_REMOV, 142 "TANDBERG", " TDC 3800 ", ""}, {0, 0, { 143 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 144 {0, 0, QIC_525}, /* minor 4-7 */ 145 {0, 0, QIC_150}, /* minor 8-11 */ 146 {0, 0, QIC_120} /* minor 12-15 */ 147 }}}, 148 /* 149 * At least -005 and -007 need this. I'll assume they all do unless I 150 * hear otherwise. - mycroft, 31MAR1994 151 */ 152 {{T_SEQUENTIAL, T_REMOV, 153 "ARCHIVE ", "VIPER 2525 25462", ""}, {0, 0, { 154 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 155 {ST_Q_SENSE_HELP, 0, QIC_525}, /* minor 4-7 */ 156 {0, 0, QIC_150}, /* minor 8-11 */ 157 {0, 0, QIC_120} /* minor 12-15 */ 158 }}}, 159 /* 160 * One user reports that this works for his tape drive. It probably 161 * needs more work. - mycroft, 09APR1994 162 */ 163 {{T_SEQUENTIAL, T_REMOV, 164 "SANKYO ", "CP525 ", ""}, {0, 0, { 165 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 166 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 167 {0, 0, QIC_150}, /* minor 8-11 */ 168 {0, 0, QIC_120} /* minor 12-15 */ 169 }}}, 170 {{T_SEQUENTIAL, T_REMOV, 171 "ANRITSU ", "DMT780 ", ""}, {0, 0, { 172 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 173 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 174 {0, 0, QIC_150}, /* minor 8-11 */ 175 {0, 0, QIC_120} /* minor 12-15 */ 176 }}}, 177 {{T_SEQUENTIAL, T_REMOV, 178 "ARCHIVE ", "VIPER 150 21247", ""}, {0, 12, { 179 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 180 {0, 0, QIC_150}, /* minor 4-7 */ 181 {0, 0, QIC_120}, /* minor 8-11 */ 182 {0, 0, QIC_24} /* minor 12-15 */ 183 }}}, 184 {{T_SEQUENTIAL, T_REMOV, 185 "WANGTEK ", "5099ES SCSI", ""}, {0, 0, { 186 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 187 {0, 0, QIC_11}, /* minor 4-7 */ 188 {0, 0, QIC_24}, /* minor 8-11 */ 189 {0, 0, QIC_24} /* minor 12-15 */ 190 }}}, 191 {{T_SEQUENTIAL, T_REMOV, 192 "WANGTEK ", "5150ES SCSI", ""}, {0, 0, { 193 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 194 {0, 0, QIC_24}, /* minor 4-7 */ 195 {0, 0, QIC_120}, /* minor 8-11 */ 196 {0, 0, QIC_150} /* minor 12-15 */ 197 }}}, 198 {{T_SEQUENTIAL, T_REMOV, 199 "WANGTEK ", "5525ES SCSI REV7", ""}, {0, 0, { 200 {0, 0, 0}, /* minor 0-3 */ 201 {ST_Q_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 202 {0, 0, QIC_150}, /* minor 8-11 */ 203 {0, 0, QIC_120} /* minor 12-15 */ 204 }}}, 205 {{T_SEQUENTIAL, T_REMOV, 206 "WangDAT ", "Model 1300 ", ""}, {0, 0, { 207 {0, 0, 0}, /* minor 0-3 */ 208 {ST_Q_FORCE_BLKSIZE, 512, DDS}, /* minor 4-7 */ 209 {ST_Q_FORCE_BLKSIZE, 1024, DDS}, /* minor 8-11 */ 210 {ST_Q_FORCE_BLKSIZE, 0, DDS} /* minor 12-15 */ 211 }}}, 212 {{T_SEQUENTIAL, T_REMOV, 213 "EXABYTE ", "EXB-8200 ", "263H"}, {0, 5, { 214 {0, 0, 0}, /* minor 0-3 */ 215 {0, 0, 0}, /* minor 4-7 */ 216 {0, 0, 0}, /* minor 8-11 */ 217 {0, 0, 0} /* minor 12-15 */ 218 }}}, 219 {{T_SEQUENTIAL, T_REMOV, 220 "IBM", "03590", ""}, {ST_Q_IGNORE_LOADS, 0, { 221 {0, 0, 0}, /* minor 0-3 */ 222 {0, 0, 0}, /* minor 4-7 */ 223 {0, 0, 0}, /* minor 8-11 */ 224 {0, 0, 0} /* minor 12-15 */ 225 }}}, 226 {{T_SEQUENTIAL, T_REMOV, 227 "HP ", "T4000s ", ""}, {ST_Q_UNIMODAL, 0, { 228 {0, 0, QIC_3095}, /* minor 0-3 */ 229 {0, 0, QIC_3095}, /* minor 4-7 */ 230 {0, 0, QIC_3095}, /* minor 8-11 */ 231 {0, 0, QIC_3095}, /* minor 12-15 */ 232 }}}, 233 #if 0 234 {{T_SEQUENTIAL, T_REMOV, 235 "EXABYTE ", "EXB-8200 ", ""}, {0, 12, { 236 {0, 0, 0}, /* minor 0-3 */ 237 {0, 0, 0}, /* minor 4-7 */ 238 {0, 0, 0}, /* minor 8-11 */ 239 {0, 0, 0} /* minor 12-15 */ 240 }}}, 241 #endif 242 }; 243 244 #define NOEJECT 0 245 #define EJECT 1 246 247 struct st_softc { 248 struct device sc_dev; 249 /*--------------------present operating parameters, flags etc.---------------*/ 250 int flags; /* see below */ 251 u_int quirks; /* quirks for the open mode */ 252 int blksize; /* blksize we are using */ 253 u_int8_t density; /* present density */ 254 u_int page_0_size; /* size of page 0 data */ 255 u_int last_dsty; /* last density opened */ 256 /*--------------------device/scsi parameters---------------------------------*/ 257 struct scsipi_link *sc_link; /* our link to the adpter etc. */ 258 /*--------------------parameters reported by the device ---------------------*/ 259 int blkmin; /* min blk size */ 260 int blkmax; /* max blk size */ 261 struct quirkdata *quirkdata; /* if we have a rogue entry */ 262 /*--------------------parameters reported by the device for this media-------*/ 263 u_long numblks; /* nominal blocks capacity */ 264 int media_blksize; /* 0 if not ST_FIXEDBLOCKS */ 265 u_int8_t media_density; /* this is what it said when asked */ 266 /*--------------------quirks for the whole drive-----------------------------*/ 267 u_int drive_quirks; /* quirks of this drive */ 268 /*--------------------How we should set up when opening each minor device----*/ 269 struct modes modes[4]; /* plus more for each mode */ 270 u_int8_t modeflags[4]; /* flags for the modes */ 271 #define DENSITY_SET_BY_USER 0x01 272 #define DENSITY_SET_BY_QUIRK 0x02 273 #define BLKSIZE_SET_BY_USER 0x04 274 #define BLKSIZE_SET_BY_QUIRK 0x08 275 /*--------------------storage for sense data returned by the drive-----------*/ 276 u_char sense_data[MAX_PAGE_0_SIZE]; /* 277 * additional sense data needed 278 * for mode sense/select. 279 */ 280 struct buf buf_queue; /* the queue of pending IO */ 281 /* operations */ 282 #if NRND > 0 283 rndsource_element_t rnd_source; 284 #endif 285 }; 286 287 288 #ifdef __BROKEN_INDIRECT_CONFIG 289 int stmatch __P((struct device *, void *, void *)); 290 #else 291 int stmatch __P((struct device *, struct cfdata *, void *)); 292 #endif 293 void stattach __P((struct device *, struct device *, void *)); 294 void st_identify_drive __P((struct st_softc *, 295 struct scsipi_inquiry_pattern *)); 296 void st_loadquirks __P((struct st_softc *)); 297 int st_mount_tape __P((dev_t, int)); 298 void st_unmount __P((struct st_softc *, boolean)); 299 int st_decide_mode __P((struct st_softc *, boolean)); 300 void ststart __P((void *)); 301 void stdone __P((struct scsipi_xfer *)); 302 int st_read __P((struct st_softc *, char *, int, int)); 303 int st_read_block_limits __P((struct st_softc *, int)); 304 int st_mode_sense __P((struct st_softc *, int)); 305 int st_mode_select __P((struct st_softc *, int)); 306 int st_cmprss __P((struct st_softc *, int)); 307 int st_space __P((struct st_softc *, int, u_int, int)); 308 int st_write_filemarks __P((struct st_softc *, int, int)); 309 int st_check_eod __P((struct st_softc *, boolean, int *, int)); 310 int st_load __P((struct st_softc *, u_int, int)); 311 int st_rewind __P((struct st_softc *, u_int, int)); 312 int st_interpret_sense __P((struct scsipi_xfer *)); 313 int st_touch_tape __P((struct st_softc *)); 314 int st_erase __P((struct st_softc *, int full, int flags)); 315 int st_rdpos __P((struct st_softc *, int, u_int32_t *)); 316 int st_setpos __P((struct st_softc *, int, u_int32_t *)); 317 318 struct cfattach st_ca = { 319 sizeof(struct st_softc), stmatch, stattach 320 }; 321 322 extern struct cfdriver st_cd; 323 324 struct scsipi_device st_switch = { 325 st_interpret_sense, 326 ststart, 327 NULL, 328 #if NRND > 0 329 stdone, /* only needed to gather timing data for randomness */ 330 #else 331 NULL, 332 #endif 333 }; 334 335 #define ST_INFO_VALID 0x0001 336 #define ST_BLOCK_SET 0x0002 /* block size, mode set by ioctl */ 337 #define ST_WRITTEN 0x0004 /* data have been written, EOD needed */ 338 #define ST_FIXEDBLOCKS 0x0008 339 #define ST_AT_FILEMARK 0x0010 340 #define ST_EIO_PENDING 0x0020 /* we couldn't report it then (had data) */ 341 #define ST_NEW_MOUNT 0x0040 /* still need to decide mode */ 342 #define ST_READONLY 0x0080 /* st_mode_sense says write protected */ 343 #define ST_FM_WRITTEN 0x0100 /* 344 * EOF file mark written -- used with 345 * ~ST_WRITTEN to indicate that multiple file 346 * marks have been written 347 */ 348 #define ST_BLANK_READ 0x0200 /* BLANK CHECK encountered already */ 349 #define ST_2FM_AT_EOD 0x0400 /* write 2 file marks at EOD */ 350 #define ST_MOUNTED 0x0800 /* Device is presently mounted */ 351 #define ST_DONTBUFFER 0x1000 /* Disable buffering/caching */ 352 353 #define ST_PER_ACTION (ST_AT_FILEMARK | ST_EIO_PENDING | ST_BLANK_READ) 354 #define ST_PER_MOUNT (ST_INFO_VALID | ST_BLOCK_SET | ST_WRITTEN | \ 355 ST_FIXEDBLOCKS | ST_READONLY | ST_FM_WRITTEN | \ 356 ST_2FM_AT_EOD | ST_PER_ACTION) 357 358 struct scsipi_inquiry_pattern st_patterns[] = { 359 {T_SEQUENTIAL, T_REMOV, 360 "", "", ""}, 361 }; 362 363 int 364 stmatch(parent, match, aux) 365 struct device *parent; 366 #ifdef __BROKEN_INDIRECT_CONFIG 367 void *match; 368 #else 369 struct cfdata *match; 370 #endif 371 void *aux; 372 { 373 struct scsipibus_attach_args *sa = aux; 374 int priority; 375 376 (void)scsipi_inqmatch(&sa->sa_inqbuf, 377 (caddr_t)st_patterns, sizeof(st_patterns)/sizeof(st_patterns[0]), 378 sizeof(st_patterns[0]), &priority); 379 return (priority); 380 } 381 382 /* 383 * The routine called by the low level scsi routine when it discovers 384 * A device suitable for this driver 385 */ 386 void 387 stattach(parent, self, aux) 388 struct device *parent, *self; 389 void *aux; 390 { 391 struct st_softc *st = (void *)self; 392 struct scsipibus_attach_args *sa = aux; 393 struct scsipi_link *sc_link = sa->sa_sc_link; 394 395 SC_DEBUG(sc_link, SDEV_DB2, ("stattach: ")); 396 397 /* 398 * Store information needed to contact our base driver 399 */ 400 st->sc_link = sc_link; 401 sc_link->device = &st_switch; 402 sc_link->device_softc = st; 403 sc_link->openings = 1; 404 405 /* 406 * Check if the drive is a known criminal and take 407 * Any steps needed to bring it into line 408 */ 409 st_identify_drive(st, &sa->sa_inqbuf); 410 411 /* 412 * Use the subdriver to request information regarding 413 * the drive. We cannot use interrupts yet, so the 414 * request must specify this. 415 */ 416 printf("\n"); 417 printf("%s: %s", st->sc_dev.dv_xname, st->quirkdata ? "rogue, " : ""); 418 if (scsipi_test_unit_ready(sc_link, 419 SCSI_AUTOCONF | SCSI_SILENT | SCSI_IGNORE_MEDIA_CHANGE) || 420 st_mode_sense(st, 421 SCSI_AUTOCONF | SCSI_SILENT | SCSI_IGNORE_MEDIA_CHANGE)) 422 printf("drive empty\n"); 423 else { 424 printf("density code 0x%x, ", st->media_density); 425 if (st->media_blksize > 0) 426 printf("%d-byte", st->media_blksize); 427 else 428 printf("variable"); 429 printf(" blocks, write-%s\n", 430 (st->flags & ST_READONLY) ? "protected" : "enabled"); 431 } 432 433 /* 434 * Set up the buf queue for this device 435 */ 436 st->buf_queue.b_active = 0; 437 st->buf_queue.b_actf = 0; 438 st->buf_queue.b_actb = &st->buf_queue.b_actf; 439 440 #if NRND > 0 441 rnd_attach_source(&st->rnd_source, st->sc_dev.dv_xname, RND_TYPE_TAPE); 442 #endif 443 } 444 445 /* 446 * Use the inquiry routine in 'scsi_base' to get drive info so we can 447 * Further tailor our behaviour. 448 */ 449 void 450 st_identify_drive(st, inqbuf) 451 struct st_softc *st; 452 struct scsipi_inquiry_pattern *inqbuf; 453 { 454 struct st_quirk_inquiry_pattern *finger; 455 int priority; 456 457 finger = (struct st_quirk_inquiry_pattern *)scsipi_inqmatch(inqbuf, 458 (caddr_t)st_quirk_patterns, 459 sizeof(st_quirk_patterns) / sizeof(st_quirk_patterns[0]), 460 sizeof(st_quirk_patterns[0]), &priority); 461 if (priority != 0) { 462 st->quirkdata = &finger->quirkdata; 463 st->drive_quirks = finger->quirkdata.quirks; 464 st->quirks = finger->quirkdata.quirks; /* start value */ 465 st->page_0_size = finger->quirkdata.page_0_size; 466 st_loadquirks(st); 467 } 468 } 469 470 /* 471 * initialise the subdevices to the default (QUIRK) state. 472 * this will remove any setting made by the system operator or previous 473 * operations. 474 */ 475 void 476 st_loadquirks(st) 477 struct st_softc *st; 478 { 479 int i; 480 struct modes *mode; 481 struct modes *mode2; 482 483 mode = st->quirkdata->modes; 484 mode2 = st->modes; 485 for (i = 0; i < 4; i++) { 486 bzero(mode2, sizeof(struct modes)); 487 st->modeflags[i] &= ~(BLKSIZE_SET_BY_QUIRK | 488 DENSITY_SET_BY_QUIRK | BLKSIZE_SET_BY_USER | 489 DENSITY_SET_BY_USER); 490 if ((mode->quirks | st->drive_quirks) & ST_Q_FORCE_BLKSIZE) { 491 mode2->blksize = mode->blksize; 492 st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; 493 } 494 if (mode->density) { 495 mode2->density = mode->density; 496 st->modeflags[i] |= DENSITY_SET_BY_QUIRK; 497 } 498 mode++; 499 mode2++; 500 } 501 } 502 503 /* 504 * open the device. 505 */ 506 int 507 stopen(dev, flags, mode, p) 508 dev_t dev; 509 int flags; 510 int mode; 511 struct proc *p; 512 { 513 int unit; 514 u_int stmode, dsty; 515 int error = 0; 516 struct st_softc *st; 517 struct scsipi_link *sc_link; 518 519 unit = STUNIT(dev); 520 if (unit >= st_cd.cd_ndevs) 521 return (ENXIO); 522 st = st_cd.cd_devs[unit]; 523 if (st == NULL) 524 return (ENXIO); 525 526 stmode = STMODE(dev); 527 dsty = STDSTY(dev); 528 sc_link = st->sc_link; 529 530 SC_DEBUG(sc_link, SDEV_DB1, ("open: dev=0x%x (unit %d (of %d))\n", dev, 531 unit, st_cd.cd_ndevs)); 532 533 /* 534 * Only allow one at a time 535 */ 536 if (sc_link->flags & SDEV_OPEN) { 537 printf("%s: already open\n", st->sc_dev.dv_xname); 538 return (EBUSY); 539 } 540 541 /* 542 * Catch any unit attention errors. 543 */ 544 error = scsipi_test_unit_ready(sc_link, SCSI_IGNORE_MEDIA_CHANGE | 545 (stmode == CTLMODE ? SCSI_IGNORE_NOT_READY : 0)); 546 if (error) 547 goto bad; 548 549 sc_link->flags |= SDEV_OPEN; /* unit attn are now errors */ 550 551 /* 552 * If the mode is 3 (e.g. minor = 3,7,11,15) 553 * then the device has been opened to set defaults 554 * This mode does NOT ALLOW I/O, only ioctls 555 */ 556 if (stmode == CTLMODE) 557 return (0); 558 559 /* 560 * if it's a different mode, or if the media has been 561 * invalidated, unmount the tape from the previous 562 * session but continue with open processing 563 */ 564 if (st->last_dsty != dsty || !(sc_link->flags & SDEV_MEDIA_LOADED)) 565 st_unmount(st, NOEJECT); 566 567 /* 568 * If we are not mounted, then we should start a new 569 * mount session. 570 */ 571 if (!(st->flags & ST_MOUNTED)) { 572 st_mount_tape(dev, flags); 573 st->last_dsty = dsty; 574 } 575 576 /* 577 * Make sure that a tape opened in write-only mode will have 578 * file marks written on it when closed, even if not written to. 579 * This is for SUN compatibility 580 */ 581 if ((flags & O_ACCMODE) == FWRITE) 582 st->flags |= ST_WRITTEN; 583 584 SC_DEBUG(sc_link, SDEV_DB2, ("open complete\n")); 585 return (0); 586 587 bad: 588 st_unmount(st, NOEJECT); 589 sc_link->flags &= ~SDEV_OPEN; 590 return (error); 591 } 592 593 /* 594 * close the device.. only called if we are the LAST 595 * occurence of an open device 596 */ 597 int 598 stclose(dev, flags, mode, p) 599 dev_t dev; 600 int flags; 601 int mode; 602 struct proc *p; 603 { 604 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 605 606 SC_DEBUG(st->sc_link, SDEV_DB1, ("closing\n")); 607 if ((st->flags & (ST_WRITTEN | ST_FM_WRITTEN)) == ST_WRITTEN) 608 st_write_filemarks(st, 1, 0); 609 switch (STMODE(dev)) { 610 case 0: 611 case 3: /* for now */ 612 st_unmount(st, NOEJECT); 613 break; 614 case 1: 615 /* leave mounted unless media seems to have been removed */ 616 if (!(st->sc_link->flags & SDEV_MEDIA_LOADED)) 617 st_unmount(st, NOEJECT); 618 break; 619 case 2: 620 st_unmount(st, EJECT); 621 break; 622 } 623 st->sc_link->flags &= ~SDEV_OPEN; 624 625 return (0); 626 } 627 628 /* 629 * Start a new mount session. 630 * Copy in all the default parameters from the selected device mode. 631 * and try guess any that seem to be defaulted. 632 */ 633 int 634 st_mount_tape(dev, flags) 635 dev_t dev; 636 int flags; 637 { 638 int unit; 639 u_int mode, dsty; 640 struct st_softc *st; 641 struct scsipi_link *sc_link; 642 int error = 0; 643 644 unit = STUNIT(dev); 645 mode = STMODE(dev); 646 dsty = STDSTY(dev); 647 st = st_cd.cd_devs[unit]; 648 sc_link = st->sc_link; 649 650 if (st->flags & ST_MOUNTED) 651 return (0); 652 653 SC_DEBUG(sc_link, SDEV_DB1, ("mounting\n ")); 654 st->flags |= ST_NEW_MOUNT; 655 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 656 /* 657 * If the media is new, then make sure we give it a chance to 658 * to do a 'load' instruction. (We assume it is new.) 659 */ 660 if ((error = st_load(st, LD_LOAD, 0)) != 0) 661 return (error); 662 /* 663 * Throw another dummy instruction to catch 664 * 'Unit attention' errors. Some drives appear to give 665 * these after doing a Load instruction. 666 * (noteably some DAT drives) 667 */ 668 scsipi_test_unit_ready(sc_link, SCSI_SILENT); /* XXX */ 669 670 /* 671 * Some devices can't tell you much until they have been 672 * asked to look at the media. This quirk does this. 673 */ 674 if (st->quirks & ST_Q_SENSE_HELP) 675 if ((error = st_touch_tape(st)) != 0) 676 return (error); 677 /* 678 * Load the physical device parameters 679 * loads: blkmin, blkmax 680 */ 681 if ((error = st_read_block_limits(st, 0)) != 0) 682 return (error); 683 /* 684 * Load the media dependent parameters 685 * includes: media_blksize,media_density,numblks 686 * As we have a tape in, it should be reflected here. 687 * If not you may need the "quirk" above. 688 */ 689 if ((error = st_mode_sense(st, 0)) != 0) 690 return (error); 691 /* 692 * If we have gained a permanent density from somewhere, 693 * then use it in preference to the one supplied by 694 * default by the driver. 695 */ 696 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 697 st->density = st->modes[dsty].density; 698 else 699 st->density = st->media_density; 700 /* 701 * If we have gained a permanent blocksize 702 * then use it in preference to the one supplied by 703 * default by the driver. 704 */ 705 st->flags &= ~ST_FIXEDBLOCKS; 706 if (st->modeflags[dsty] & 707 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 708 st->blksize = st->modes[dsty].blksize; 709 if (st->blksize) 710 st->flags |= ST_FIXEDBLOCKS; 711 } else { 712 if ((error = st_decide_mode(st, FALSE)) != 0) 713 return (error); 714 } 715 if ((error = st_mode_select(st, 0)) != 0) { 716 printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); 717 return (error); 718 } 719 scsipi_prevent(sc_link, PR_PREVENT, 720 SCSI_IGNORE_ILLEGAL_REQUEST | SCSI_IGNORE_NOT_READY); 721 st->flags &= ~ST_NEW_MOUNT; 722 st->flags |= ST_MOUNTED; 723 sc_link->flags |= SDEV_MEDIA_LOADED; /* move earlier? */ 724 725 return (0); 726 } 727 728 /* 729 * End the present mount session. 730 * Rewind, and optionally eject the tape. 731 * Reset various flags to indicate that all new 732 * operations require another mount operation 733 */ 734 void 735 st_unmount(st, eject) 736 struct st_softc *st; 737 boolean eject; 738 { 739 struct scsipi_link *sc_link = st->sc_link; 740 int nmarks; 741 742 if (!(st->flags & ST_MOUNTED)) 743 return; 744 SC_DEBUG(sc_link, SDEV_DB1, ("unmounting\n")); 745 st_check_eod(st, FALSE, &nmarks, SCSI_IGNORE_NOT_READY); 746 st_rewind(st, 0, SCSI_IGNORE_NOT_READY); 747 scsipi_prevent(sc_link, PR_ALLOW, 748 SCSI_IGNORE_ILLEGAL_REQUEST | SCSI_IGNORE_NOT_READY); 749 if (eject) 750 st_load(st, LD_UNLOAD, SCSI_IGNORE_NOT_READY); 751 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 752 sc_link->flags &= ~SDEV_MEDIA_LOADED; 753 } 754 755 /* 756 * Given all we know about the device, media, mode, 'quirks' and 757 * initial operation, make a decision as to how we should be set 758 * to run (regarding blocking and EOD marks) 759 */ 760 int 761 st_decide_mode(st, first_read) 762 struct st_softc *st; 763 boolean first_read; 764 { 765 #ifdef SCSIDEBUG 766 struct scsipi_link *sc_link = st->sc_link; 767 #endif 768 769 SC_DEBUG(sc_link, SDEV_DB2, ("starting block mode decision\n")); 770 771 /* 772 * If the drive can only handle fixed-length blocks and only at 773 * one size, perhaps we should just do that. 774 */ 775 if (st->blkmin && (st->blkmin == st->blkmax)) { 776 st->flags |= ST_FIXEDBLOCKS; 777 st->blksize = st->blkmin; 778 SC_DEBUG(sc_link, SDEV_DB3, 779 ("blkmin == blkmax of %d\n", st->blkmin)); 780 goto done; 781 } 782 /* 783 * If the tape density mandates (or even suggests) use of fixed 784 * or variable-length blocks, comply. 785 */ 786 switch (st->density) { 787 case HALFINCH_800: 788 case HALFINCH_1600: 789 case HALFINCH_6250: 790 case DDS: 791 st->flags &= ~ST_FIXEDBLOCKS; 792 st->blksize = 0; 793 SC_DEBUG(sc_link, SDEV_DB3, ("density specified variable\n")); 794 goto done; 795 case QIC_11: 796 case QIC_24: 797 case QIC_120: 798 case QIC_150: 799 case QIC_525: 800 case QIC_1320: 801 st->flags |= ST_FIXEDBLOCKS; 802 if (st->media_blksize > 0) 803 st->blksize = st->media_blksize; 804 else 805 st->blksize = DEF_FIXED_BSIZE; 806 SC_DEBUG(sc_link, SDEV_DB3, ("density specified fixed\n")); 807 goto done; 808 } 809 /* 810 * If we're about to read the tape, perhaps we should choose 811 * fixed or variable-length blocks and block size according to 812 * what the drive found on the tape. 813 */ 814 if (first_read && 815 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 816 (st->media_blksize == DEF_FIXED_BSIZE) || 817 (st->media_blksize == 1024))) { 818 if (st->media_blksize > 0) 819 st->flags |= ST_FIXEDBLOCKS; 820 else 821 st->flags &= ~ST_FIXEDBLOCKS; 822 st->blksize = st->media_blksize; 823 SC_DEBUG(sc_link, SDEV_DB3, 824 ("Used media_blksize of %d\n", st->media_blksize)); 825 goto done; 826 } 827 /* 828 * We're getting no hints from any direction. Choose variable- 829 * length blocks arbitrarily. 830 */ 831 st->flags &= ~ST_FIXEDBLOCKS; 832 st->blksize = 0; 833 SC_DEBUG(sc_link, SDEV_DB3, 834 ("Give up and default to variable mode\n")); 835 836 done: 837 /* 838 * Decide whether or not to write two file marks to signify end- 839 * of-data. Make the decision as a function of density. If 840 * the decision is not to use a second file mark, the SCSI BLANK 841 * CHECK condition code will be recognized as end-of-data when 842 * first read. 843 * (I think this should be a by-product of fixed/variable..julian) 844 */ 845 switch (st->density) { 846 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 847 case QIC_11: 848 case QIC_24: 849 case QIC_120: 850 case QIC_150: 851 case QIC_525: 852 case QIC_1320: 853 st->flags &= ~ST_2FM_AT_EOD; 854 break; 855 default: 856 st->flags |= ST_2FM_AT_EOD; 857 } 858 return (0); 859 } 860 861 /* 862 * Actually translate the requested transfer into 863 * one the physical driver can understand 864 * The transfer is described by a buf and will include 865 * only one physical transfer. 866 */ 867 void 868 ststrategy(bp) 869 struct buf *bp; 870 { 871 struct st_softc *st = st_cd.cd_devs[STUNIT(bp->b_dev)]; 872 struct buf *dp; 873 int s; 874 875 SC_DEBUG(st->sc_link, SDEV_DB1, 876 ("ststrategy %ld bytes @ blk %d\n", bp->b_bcount, bp->b_blkno)); 877 /* 878 * If it's a null transfer, return immediatly 879 */ 880 if (bp->b_bcount == 0) 881 goto done; 882 /* 883 * Odd sized request on fixed drives are verboten 884 */ 885 if (st->flags & ST_FIXEDBLOCKS) { 886 if (bp->b_bcount % st->blksize) { 887 printf("%s: bad request, must be multiple of %d\n", 888 st->sc_dev.dv_xname, st->blksize); 889 bp->b_error = EIO; 890 goto bad; 891 } 892 } 893 /* 894 * as are out-of-range requests on variable drives. 895 */ 896 else if (bp->b_bcount < st->blkmin || 897 (st->blkmax && bp->b_bcount > st->blkmax)) { 898 printf("%s: bad request, must be between %d and %d\n", 899 st->sc_dev.dv_xname, st->blkmin, st->blkmax); 900 bp->b_error = EIO; 901 goto bad; 902 } 903 s = splbio(); 904 905 /* 906 * Place it in the queue of activities for this tape 907 * at the end (a bit silly because we only have on user.. 908 * (but it could fork())) 909 */ 910 dp = &st->buf_queue; 911 bp->b_actf = NULL; 912 bp->b_actb = dp->b_actb; 913 *dp->b_actb = bp; 914 dp->b_actb = &bp->b_actf; 915 916 /* 917 * Tell the device to get going on the transfer if it's 918 * not doing anything, otherwise just wait for completion 919 * (All a bit silly if we're only allowing 1 open but..) 920 */ 921 ststart(st); 922 923 splx(s); 924 return; 925 bad: 926 bp->b_flags |= B_ERROR; 927 done: 928 /* 929 * Correctly set the buf to indicate a completed xfer 930 */ 931 bp->b_resid = bp->b_bcount; 932 biodone(bp); 933 return; 934 } 935 936 /* 937 * ststart looks to see if there is a buf waiting for the device 938 * and that the device is not already busy. If both are true, 939 * It dequeues the buf and creates a scsi command to perform the 940 * transfer required. The transfer request will call scsipi_done 941 * on completion, which will in turn call this routine again 942 * so that the next queued transfer is performed. 943 * The bufs are queued by the strategy routine (ststrategy) 944 * 945 * This routine is also called after other non-queued requests 946 * have been made of the scsi driver, to ensure that the queue 947 * continues to be drained. 948 * ststart() is called at splbio 949 */ 950 void 951 ststart(v) 952 void *v; 953 { 954 struct st_softc *st = v; 955 struct scsipi_link *sc_link = st->sc_link; 956 register struct buf *bp, *dp; 957 struct scsi_rw_tape cmd; 958 int flags; 959 960 SC_DEBUG(sc_link, SDEV_DB2, ("ststart ")); 961 /* 962 * See if there is a buf to do and we are not already 963 * doing one 964 */ 965 while (sc_link->openings > 0) { 966 /* if a special awaits, let it proceed first */ 967 if (sc_link->flags & SDEV_WAITING) { 968 sc_link->flags &= ~SDEV_WAITING; 969 wakeup((caddr_t)sc_link); 970 return; 971 } 972 973 dp = &st->buf_queue; 974 if ((bp = dp->b_actf) == NULL) 975 return; 976 if ((dp = bp->b_actf) != NULL) 977 dp->b_actb = bp->b_actb; 978 else 979 st->buf_queue.b_actb = bp->b_actb; 980 *bp->b_actb = dp; 981 982 /* 983 * if the device has been unmounted byt the user 984 * then throw away all requests until done 985 */ 986 if (!(st->flags & ST_MOUNTED) || 987 !(sc_link->flags & SDEV_MEDIA_LOADED)) { 988 /* make sure that one implies the other.. */ 989 sc_link->flags &= ~SDEV_MEDIA_LOADED; 990 bp->b_flags |= B_ERROR; 991 bp->b_error = EIO; 992 bp->b_resid = bp->b_bcount; 993 biodone(bp); 994 continue; 995 } 996 /* 997 * only FIXEDBLOCK devices have pending operations 998 */ 999 if (st->flags & ST_FIXEDBLOCKS) { 1000 /* 1001 * If we are at a filemark but have not reported it yet 1002 * then we should report it now 1003 */ 1004 if (st->flags & ST_AT_FILEMARK) { 1005 if ((bp->b_flags & B_READ) == B_WRITE) { 1006 /* 1007 * Handling of ST_AT_FILEMARK in 1008 * st_space will fill in the right file 1009 * mark count. 1010 * Back up over filemark 1011 */ 1012 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1013 bp->b_flags |= B_ERROR; 1014 bp->b_error = EIO; 1015 biodone(bp); 1016 continue; 1017 } 1018 } else { 1019 bp->b_resid = bp->b_bcount; 1020 bp->b_error = 0; 1021 bp->b_flags &= ~B_ERROR; 1022 st->flags &= ~ST_AT_FILEMARK; 1023 biodone(bp); 1024 continue; /* seek more work */ 1025 } 1026 } 1027 /* 1028 * If we are at EIO (e.g. EOM) but have not reported it 1029 * yet then we should report it now 1030 */ 1031 if (st->flags & ST_EIO_PENDING) { 1032 bp->b_resid = bp->b_bcount; 1033 bp->b_error = EIO; 1034 bp->b_flags |= B_ERROR; 1035 st->flags &= ~ST_EIO_PENDING; 1036 biodone(bp); 1037 continue; /* seek more work */ 1038 } 1039 } 1040 1041 /* 1042 * Fill out the scsi command 1043 */ 1044 bzero(&cmd, sizeof(cmd)); 1045 if ((bp->b_flags & B_READ) == B_WRITE) { 1046 cmd.opcode = WRITE; 1047 st->flags &= ~ST_FM_WRITTEN; 1048 st->flags |= ST_WRITTEN; 1049 flags = SCSI_DATA_OUT; 1050 } else { 1051 cmd.opcode = READ; 1052 flags = SCSI_DATA_IN; 1053 } 1054 1055 /* 1056 * Handle "fixed-block-mode" tape drives by using the 1057 * block count instead of the length. 1058 */ 1059 if (st->flags & ST_FIXEDBLOCKS) { 1060 cmd.byte2 |= SRW_FIXED; 1061 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1062 } else 1063 _lto3b(bp->b_bcount, cmd.len); 1064 1065 /* 1066 * go ask the adapter to do all this for us 1067 */ 1068 if (scsipi_command(sc_link, 1069 (struct scsipi_generic *)&cmd, sizeof(cmd), 1070 (u_char *)bp->b_data, bp->b_bcount, 1071 0, 100000, bp, flags | SCSI_NOSLEEP)) 1072 printf("%s: not queued\n", st->sc_dev.dv_xname); 1073 } /* go back and see if we can cram more work in.. */ 1074 } 1075 1076 #if NRND > 0 1077 void 1078 stdone(xs) 1079 struct scsipi_xfer *xs; 1080 { 1081 struct st_softc *st = xs->sc_link->device_softc; 1082 1083 if (xs->bp != NULL) 1084 rnd_add_uint32(&st->rnd_source, xs->bp->b_blkno); 1085 } 1086 #endif 1087 1088 int 1089 stread(dev, uio, iomode) 1090 dev_t dev; 1091 struct uio *uio; 1092 int iomode; 1093 { 1094 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1095 1096 return (physio(ststrategy, NULL, dev, B_READ, 1097 st->sc_link->adapter->scsipi_minphys, uio)); 1098 } 1099 1100 int 1101 stwrite(dev, uio, iomode) 1102 dev_t dev; 1103 struct uio *uio; 1104 int iomode; 1105 { 1106 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1107 1108 return (physio(ststrategy, NULL, dev, B_WRITE, 1109 st->sc_link->adapter->scsipi_minphys, uio)); 1110 } 1111 1112 /* 1113 * Perform special action on behalf of the user; 1114 * knows about the internals of this device 1115 */ 1116 int 1117 stioctl(dev, cmd, arg, flag, p) 1118 dev_t dev; 1119 u_long cmd; 1120 caddr_t arg; 1121 int flag; 1122 struct proc *p; 1123 { 1124 int error = 0; 1125 int unit; 1126 int number, nmarks, dsty; 1127 int flags; 1128 struct st_softc *st; 1129 int hold_blksize; 1130 u_int8_t hold_density; 1131 struct mtop *mt = (struct mtop *) arg; 1132 1133 /* 1134 * Find the device that the user is talking about 1135 */ 1136 flags = 0; /* give error messages, act on errors etc. */ 1137 unit = STUNIT(dev); 1138 dsty = STDSTY(dev); 1139 st = st_cd.cd_devs[unit]; 1140 hold_blksize = st->blksize; 1141 hold_density = st->density; 1142 1143 switch ((u_int) cmd) { 1144 1145 case MTIOCGET: { 1146 struct mtget *g = (struct mtget *) arg; 1147 1148 SC_DEBUG(st->sc_link, SDEV_DB1, ("[ioctl: get status]\n")); 1149 bzero(g, sizeof(struct mtget)); 1150 g->mt_type = 0x7; /* Ultrix compat *//*? */ 1151 g->mt_blksiz = st->blksize; 1152 g->mt_density = st->density; 1153 g->mt_mblksiz[0] = st->modes[0].blksize; 1154 g->mt_mblksiz[1] = st->modes[1].blksize; 1155 g->mt_mblksiz[2] = st->modes[2].blksize; 1156 g->mt_mblksiz[3] = st->modes[3].blksize; 1157 g->mt_mdensity[0] = st->modes[0].density; 1158 g->mt_mdensity[1] = st->modes[1].density; 1159 g->mt_mdensity[2] = st->modes[2].density; 1160 g->mt_mdensity[3] = st->modes[3].density; 1161 break; 1162 } 1163 case MTIOCTOP: { 1164 1165 SC_DEBUG(st->sc_link, SDEV_DB1, 1166 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1167 mt->mt_count)); 1168 1169 /* compat: in U*x it is a short */ 1170 number = mt->mt_count; 1171 switch ((short) (mt->mt_op)) { 1172 case MTWEOF: /* write an end-of-file record */ 1173 error = st_write_filemarks(st, number, flags); 1174 break; 1175 case MTBSF: /* backward space file */ 1176 number = -number; 1177 case MTFSF: /* forward space file */ 1178 error = st_check_eod(st, FALSE, &nmarks, flags); 1179 if (!error) 1180 error = st_space(st, number - nmarks, 1181 SP_FILEMARKS, flags); 1182 break; 1183 case MTBSR: /* backward space record */ 1184 number = -number; 1185 case MTFSR: /* forward space record */ 1186 error = st_check_eod(st, TRUE, &nmarks, flags); 1187 if (!error) 1188 error = st_space(st, number, SP_BLKS, flags); 1189 break; 1190 case MTREW: /* rewind */ 1191 error = st_rewind(st, 0, flags); 1192 break; 1193 case MTOFFL: /* rewind and put the drive offline */ 1194 st_unmount(st, EJECT); 1195 break; 1196 case MTNOP: /* no operation, sets status only */ 1197 break; 1198 case MTRETEN: /* retension the tape */ 1199 error = st_load(st, LD_RETENSION, flags); 1200 if (!error) 1201 error = st_load(st, LD_LOAD, flags); 1202 break; 1203 case MTEOM: /* forward space to end of media */ 1204 error = st_check_eod(st, FALSE, &nmarks, flags); 1205 if (!error) 1206 error = st_space(st, 1, SP_EOM, flags); 1207 break; 1208 case MTCACHE: /* enable controller cache */ 1209 st->flags &= ~ST_DONTBUFFER; 1210 goto try_new_value; 1211 case MTNOCACHE: /* disable controller cache */ 1212 st->flags |= ST_DONTBUFFER; 1213 goto try_new_value; 1214 case MTERASE: /* erase volume */ 1215 error = st_erase(st, number, flags); 1216 break; 1217 case MTSETBSIZ: /* Set block size for device */ 1218 #ifdef NOTYET 1219 if (!(st->flags & ST_NEW_MOUNT)) { 1220 uprintf("re-mount tape before changing blocksize"); 1221 error = EINVAL; 1222 break; 1223 } 1224 #endif 1225 if (number == 0) 1226 st->flags &= ~ST_FIXEDBLOCKS; 1227 else { 1228 if ((st->blkmin || st->blkmax) && 1229 (number < st->blkmin || 1230 number > st->blkmax)) { 1231 error = EINVAL; 1232 break; 1233 } 1234 st->flags |= ST_FIXEDBLOCKS; 1235 } 1236 st->blksize = number; 1237 st->flags |= ST_BLOCK_SET; /*XXX */ 1238 goto try_new_value; 1239 1240 case MTSETDNSTY: /* Set density for device and mode */ 1241 if (number > SCSI_2_MAX_DENSITY_CODE) { 1242 error = EINVAL; 1243 break; 1244 } else 1245 st->density = number; 1246 goto try_new_value; 1247 1248 case MTCMPRESS: 1249 error = st_cmprss(st, number); 1250 break; 1251 1252 default: 1253 error = EINVAL; 1254 } 1255 break; 1256 } 1257 case MTIOCIEOT: 1258 case MTIOCEEOT: 1259 break; 1260 1261 case MTIOCRDSPOS: 1262 error = st_rdpos(st, 0, (u_int32_t *) arg); 1263 break; 1264 1265 case MTIOCRDHPOS: 1266 error = st_rdpos(st, 1, (u_int32_t *) arg); 1267 break; 1268 1269 case MTIOCSLOCATE: 1270 error = st_setpos(st, 0, (u_int32_t *) arg); 1271 break; 1272 1273 case MTIOCHLOCATE: 1274 error = st_setpos(st, 1, (u_int32_t *) arg); 1275 break; 1276 1277 default: 1278 if (STMODE(dev) == CTLMODE) 1279 error = scsipi_do_ioctl(st->sc_link, dev, cmd, arg, 1280 flag, p); 1281 else 1282 error = ENOTTY; 1283 break; 1284 } 1285 return (error); 1286 /*-----------------------------*/ 1287 try_new_value: 1288 /* 1289 * Check that the mode being asked for is aggreeable to the 1290 * drive. If not, put it back the way it was. 1291 */ 1292 if ((error = st_mode_select(st, 0)) != 0) {/* put it back as it was */ 1293 printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); 1294 st->density = hold_density; 1295 st->blksize = hold_blksize; 1296 if (st->blksize) 1297 st->flags |= ST_FIXEDBLOCKS; 1298 else 1299 st->flags &= ~ST_FIXEDBLOCKS; 1300 return (error); 1301 } 1302 /* 1303 * As the drive liked it, if we are setting a new default, 1304 * set it into the structures as such. 1305 * 1306 * The means for deciding this are not finalised yet 1307 */ 1308 if (STMODE(dev) == 0x03) { 1309 /* special mode */ 1310 /* XXX */ 1311 switch ((short) (mt->mt_op)) { 1312 case MTSETBSIZ: 1313 st->modes[dsty].blksize = st->blksize; 1314 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1315 break; 1316 case MTSETDNSTY: 1317 st->modes[dsty].density = st->density; 1318 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1319 break; 1320 } 1321 } 1322 return (0); 1323 } 1324 1325 /* 1326 * Do a synchronous read. 1327 */ 1328 int 1329 st_read(st, buf, size, flags) 1330 struct st_softc *st; 1331 int size; 1332 int flags; 1333 char *buf; 1334 { 1335 struct scsi_rw_tape cmd; 1336 1337 /* 1338 * If it's a null transfer, return immediatly 1339 */ 1340 if (size == 0) 1341 return (0); 1342 bzero(&cmd, sizeof(cmd)); 1343 cmd.opcode = READ; 1344 if (st->flags & ST_FIXEDBLOCKS) { 1345 cmd.byte2 |= SRW_FIXED; 1346 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1347 cmd.len); 1348 } else 1349 _lto3b(size, cmd.len); 1350 return (scsipi_command(st->sc_link, 1351 (struct scsipi_generic *)&cmd, sizeof(cmd), 1352 (u_char *)buf, size, 0, 100000, NULL, flags | SCSI_DATA_IN)); 1353 } 1354 1355 /* 1356 * Ask the drive what it's min and max blk sizes are. 1357 */ 1358 int 1359 st_read_block_limits(st, flags) 1360 struct st_softc *st; 1361 int flags; 1362 { 1363 struct scsi_block_limits cmd; 1364 struct scsi_block_limits_data block_limits; 1365 struct scsipi_link *sc_link = st->sc_link; 1366 int error; 1367 1368 /* 1369 * First check if we have it all loaded 1370 */ 1371 if ((sc_link->flags & SDEV_MEDIA_LOADED)) 1372 return (0); 1373 1374 /* 1375 * do a 'Read Block Limits' 1376 */ 1377 bzero(&cmd, sizeof(cmd)); 1378 cmd.opcode = READ_BLOCK_LIMITS; 1379 1380 /* 1381 * do the command, update the global values 1382 */ 1383 error = scsipi_command(sc_link, (struct scsipi_generic *)&cmd, 1384 sizeof(cmd), (u_char *)&block_limits, sizeof(block_limits), 1385 ST_RETRIES, 5000, NULL, flags | SCSI_DATA_IN); 1386 if (error) 1387 return (error); 1388 1389 st->blkmin = _2btol(block_limits.min_length); 1390 st->blkmax = _3btol(block_limits.max_length); 1391 1392 SC_DEBUG(sc_link, SDEV_DB3, 1393 ("(%d <= blksize <= %d)\n", st->blkmin, st->blkmax)); 1394 return (0); 1395 } 1396 1397 /* 1398 * Get the scsi driver to send a full inquiry to the 1399 * device and use the results to fill out the global 1400 * parameter structure. 1401 * 1402 * called from: 1403 * attach 1404 * open 1405 * ioctl (to reset original blksize) 1406 */ 1407 int 1408 st_mode_sense(st, flags) 1409 struct st_softc *st; 1410 int flags; 1411 { 1412 u_int scsipi_sense_len; 1413 int error; 1414 struct scsi_mode_sense cmd; 1415 struct scsipi_sense { 1416 struct scsi_mode_header header; 1417 struct scsi_blk_desc blk_desc; 1418 u_char sense_data[MAX_PAGE_0_SIZE]; 1419 } scsipi_sense; 1420 struct scsipi_link *sc_link = st->sc_link; 1421 1422 scsipi_sense_len = 12 + st->page_0_size; 1423 1424 /* 1425 * Set up a mode sense 1426 */ 1427 bzero(&cmd, sizeof(cmd)); 1428 cmd.opcode = SCSI_MODE_SENSE; 1429 cmd.length = scsipi_sense_len; 1430 1431 /* 1432 * do the command, but we don't need the results 1433 * just print them for our interest's sake, if asked, 1434 * or if we need it as a template for the mode select 1435 * store it away. 1436 */ 1437 error = scsipi_command(sc_link, (struct scsipi_generic *)&cmd, 1438 sizeof(cmd), (u_char *)&scsipi_sense, scsipi_sense_len, 1439 ST_RETRIES, 5000, NULL, flags | SCSI_DATA_IN); 1440 if (error) 1441 return (error); 1442 1443 st->numblks = _3btol(scsipi_sense.blk_desc.nblocks); 1444 st->media_blksize = _3btol(scsipi_sense.blk_desc.blklen); 1445 st->media_density = scsipi_sense.blk_desc.density; 1446 if (scsipi_sense.header.dev_spec & SMH_DSP_WRITE_PROT) 1447 st->flags |= ST_READONLY; 1448 SC_DEBUG(sc_link, SDEV_DB3, 1449 ("density code 0x%x, %d-byte blocks, write-%s, ", 1450 st->media_density, st->media_blksize, 1451 st->flags & ST_READONLY ? "protected" : "enabled")); 1452 SC_DEBUG(sc_link, SDEV_DB3, 1453 ("%sbuffered\n", 1454 scsipi_sense.header.dev_spec & SMH_DSP_BUFF_MODE ? "" : "un")); 1455 if (st->page_0_size) 1456 bcopy(scsipi_sense.sense_data, st->sense_data, 1457 st->page_0_size); 1458 sc_link->flags |= SDEV_MEDIA_LOADED; 1459 return (0); 1460 } 1461 1462 /* 1463 * Send a filled out parameter structure to the drive to 1464 * set it into the desire modes etc. 1465 */ 1466 int 1467 st_mode_select(st, flags) 1468 struct st_softc *st; 1469 int flags; 1470 { 1471 u_int scsi_select_len; 1472 struct scsi_mode_select cmd; 1473 struct scsi_select { 1474 struct scsi_mode_header header; 1475 struct scsi_blk_desc blk_desc; 1476 u_char sense_data[MAX_PAGE_0_SIZE]; 1477 } scsi_select; 1478 struct scsipi_link *sc_link = st->sc_link; 1479 1480 scsi_select_len = 12 + st->page_0_size; 1481 1482 /* 1483 * This quirk deals with drives that have only one valid mode 1484 * and think this gives them license to reject all mode selects, 1485 * even if the selected mode is the one that is supported. 1486 */ 1487 if (st->quirks & ST_Q_UNIMODAL) { 1488 SC_DEBUG(sc_link, SDEV_DB3, 1489 ("not setting density 0x%x blksize 0x%x\n", 1490 st->density, st->blksize)); 1491 return (0); 1492 } 1493 1494 /* 1495 * Set up for a mode select 1496 */ 1497 bzero(&cmd, sizeof(cmd)); 1498 cmd.opcode = SCSI_MODE_SELECT; 1499 cmd.length = scsi_select_len; 1500 1501 bzero(&scsi_select, scsi_select_len); 1502 scsi_select.header.blk_desc_len = sizeof(struct scsi_blk_desc); 1503 scsi_select.header.dev_spec &= ~SMH_DSP_BUFF_MODE; 1504 scsi_select.blk_desc.density = st->density; 1505 if (st->flags & ST_DONTBUFFER) 1506 scsi_select.header.dev_spec |= SMH_DSP_BUFF_MODE_OFF; 1507 else 1508 scsi_select.header.dev_spec |= SMH_DSP_BUFF_MODE_ON; 1509 if (st->flags & ST_FIXEDBLOCKS) 1510 _lto3b(st->blksize, scsi_select.blk_desc.blklen); 1511 if (st->page_0_size) 1512 bcopy(st->sense_data, scsi_select.sense_data, st->page_0_size); 1513 1514 /* 1515 * do the command 1516 */ 1517 return (scsipi_command(sc_link, (struct scsipi_generic *)&cmd, 1518 sizeof(cmd), (u_char *)&scsi_select, scsi_select_len, 1519 ST_RETRIES, 5000, NULL, flags | SCSI_DATA_OUT)); 1520 } 1521 1522 int 1523 st_cmprss(st, onoff) 1524 struct st_softc *st; 1525 int onoff; 1526 { 1527 u_int scsi_dlen; 1528 struct scsi_mode_select mcmd; 1529 struct scsi_mode_sense scmd; 1530 struct scsi_select { 1531 struct scsi_mode_header header; 1532 struct scsi_blk_desc blk_desc; 1533 u_char pdata[max(sizeof(struct scsi_tape_dev_conf_page), 1534 sizeof(struct scsi_tape_dev_compression_page))]; 1535 } scsi_pdata; 1536 struct scsi_tape_dev_conf_page *ptr; 1537 struct scsi_tape_dev_compression_page *cptr; 1538 struct scsipi_link *sc_link = st->sc_link; 1539 int error, ison, flags; 1540 1541 scsi_dlen = sizeof(scsi_pdata); 1542 bzero(&scsi_pdata, scsi_dlen); 1543 1544 /* 1545 * Set up for a mode sense. 1546 * Do DATA COMPRESSION page first. 1547 */ 1548 bzero(&scmd, sizeof(scmd)); 1549 scmd.opcode = SCSI_MODE_SENSE; 1550 scmd.page = SMS_PAGE_CTRL_CURRENT | 0xf; 1551 scmd.length = scsi_dlen; 1552 1553 flags = SCSI_SILENT; 1554 1555 /* 1556 * Do the MODE SENSE command... 1557 */ 1558 again: 1559 error = scsipi_command(sc_link, 1560 (struct scsipi_generic *)&scmd, sizeof(scmd), 1561 (u_char *)&scsi_pdata, scsi_dlen, 1562 ST_RETRIES, 5000, NULL, flags | SCSI_DATA_IN); 1563 1564 if (error) { 1565 if (scmd.byte2 != SMS_DBD) { 1566 scmd.byte2 = SMS_DBD; 1567 goto again; 1568 } 1569 return (error); 1570 } 1571 1572 if (scsi_pdata.header.blk_desc_len) 1573 ptr = (struct scsi_tape_dev_conf_page *) scsi_pdata.pdata; 1574 else 1575 ptr = (struct scsi_tape_dev_conf_page *) &scsi_pdata.blk_desc; 1576 1577 if ((scmd.page & SMS_PAGE_CODE) == 0xf) { 1578 cptr = (struct scsi_tape_dev_compression_page *) ptr; 1579 ison = (cptr->dce_dcc & DCP_DCE) != 0; 1580 if (onoff) 1581 cptr->dce_dcc |= DCP_DCE; 1582 else 1583 cptr->dce_dcc &= ~DCP_DCE; 1584 cptr->pagecode &= ~0x80; 1585 } else { 1586 ison = (ptr->sel_comp_alg != 0); 1587 if (onoff) 1588 ptr->sel_comp_alg = 1; 1589 else 1590 ptr->sel_comp_alg = 0; 1591 ptr->pagecode &= ~0x80; 1592 } 1593 onoff = onoff ? 1 : 0; 1594 /* 1595 * There might be a virtue in actually doing the MODE SELECTS, 1596 * but let's not clog the bus over it. 1597 */ 1598 if (onoff == ison) 1599 return (0); 1600 1601 /* 1602 * Set up for a mode select 1603 */ 1604 1605 scsi_pdata.header.data_length = 0; 1606 scsi_pdata.header.medium_type = 0; 1607 if ((st->flags & ST_DONTBUFFER) == 0) 1608 scsi_pdata.header.dev_spec = SMH_DSP_BUFF_MODE_ON; 1609 else 1610 scsi_pdata.header.dev_spec = 0; 1611 1612 bzero(&mcmd, sizeof(mcmd)); 1613 mcmd.opcode = SCSI_MODE_SELECT; 1614 mcmd.byte2 = SMS_PF; 1615 mcmd.length = scsi_dlen; 1616 if (scsi_pdata.header.blk_desc_len) { 1617 scsi_pdata.blk_desc.density = 0; 1618 scsi_pdata.blk_desc.nblocks[0] = 0; 1619 scsi_pdata.blk_desc.nblocks[1] = 0; 1620 scsi_pdata.blk_desc.nblocks[2] = 0; 1621 } 1622 1623 /* 1624 * Do the command 1625 */ 1626 error = scsipi_command(sc_link, 1627 (struct scsipi_generic *)&mcmd, sizeof(mcmd), 1628 (u_char *)&scsi_pdata, scsi_dlen, 1629 ST_RETRIES, 5000, NULL, flags | SCSI_DATA_OUT); 1630 1631 if (error && (scmd.page & SMS_PAGE_CODE) == 0xf) { 1632 /* 1633 * Try DEVICE CONFIGURATION page. 1634 */ 1635 scmd.page = SMS_PAGE_CTRL_CURRENT | 0x10; 1636 goto again; 1637 } 1638 return (error); 1639 } 1640 /* 1641 * issue an erase command 1642 */ 1643 int 1644 st_erase(st, full, flags) 1645 struct st_softc *st; 1646 int full, flags; 1647 { 1648 struct scsi_erase cmd; 1649 1650 /* 1651 * Full erase means set LONG bit in erase command, which asks 1652 * the drive to erase the entire unit. Without this bit, we're 1653 * asking the drive to write an erase gap. 1654 */ 1655 bzero(&cmd, sizeof(cmd)); 1656 cmd.opcode = ERASE; 1657 if (full) 1658 cmd.byte2 = SE_IMMED|SE_LONG; 1659 else 1660 cmd.byte2 = SE_IMMED; 1661 1662 /* 1663 * XXX We always do this asynchronously, for now. How long should 1664 * we wait if we want to (eventually) to it synchronously? 1665 */ 1666 return (scsipi_command(st->sc_link, 1667 (struct scsipi_generic *)&cmd, sizeof(cmd), 1668 0, 0, ST_RETRIES, 5000, NULL, flags)); 1669 } 1670 1671 /* 1672 * skip N blocks/filemarks/seq filemarks/eom 1673 */ 1674 int 1675 st_space(st, number, what, flags) 1676 struct st_softc *st; 1677 u_int what; 1678 int flags; 1679 int number; 1680 { 1681 struct scsi_space cmd; 1682 int error; 1683 1684 switch (what) { 1685 case SP_BLKS: 1686 if (st->flags & ST_PER_ACTION) { 1687 if (number > 0) { 1688 st->flags &= ~ST_PER_ACTION; 1689 return (EIO); 1690 } else if (number < 0) { 1691 if (st->flags & ST_AT_FILEMARK) { 1692 /* 1693 * Handling of ST_AT_FILEMARK 1694 * in st_space will fill in the 1695 * right file mark count. 1696 */ 1697 error = st_space(st, 0, SP_FILEMARKS, 1698 flags); 1699 if (error) 1700 return (error); 1701 } 1702 if (st->flags & ST_BLANK_READ) { 1703 st->flags &= ~ST_BLANK_READ; 1704 return (EIO); 1705 } 1706 st->flags &= ~ST_EIO_PENDING; 1707 } 1708 } 1709 break; 1710 case SP_FILEMARKS: 1711 if (st->flags & ST_EIO_PENDING) { 1712 if (number > 0) { 1713 /* pretend we just discovered the error */ 1714 st->flags &= ~ST_EIO_PENDING; 1715 return (EIO); 1716 } else if (number < 0) { 1717 /* back away from the error */ 1718 st->flags &= ~ST_EIO_PENDING; 1719 } 1720 } 1721 if (st->flags & ST_AT_FILEMARK) { 1722 st->flags &= ~ST_AT_FILEMARK; 1723 number--; 1724 } 1725 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 1726 /* back away from unwritten tape */ 1727 st->flags &= ~ST_BLANK_READ; 1728 number++; /* XXX dubious */ 1729 } 1730 break; 1731 case SP_EOM: 1732 if (st->flags & ST_EIO_PENDING) { 1733 /* pretend we just discovered the error */ 1734 st->flags &= ~ST_EIO_PENDING; 1735 return (EIO); 1736 } 1737 if (st->flags & ST_AT_FILEMARK) 1738 st->flags &= ~ST_AT_FILEMARK; 1739 break; 1740 } 1741 if (number == 0) 1742 return (0); 1743 1744 bzero(&cmd, sizeof(cmd)); 1745 cmd.opcode = SPACE; 1746 cmd.byte2 = what; 1747 _lto3b(number, cmd.number); 1748 1749 return (scsipi_command(st->sc_link, 1750 (struct scsipi_generic *)&cmd, sizeof(cmd), 1751 0, 0, 0, 900000, NULL, flags)); 1752 } 1753 1754 /* 1755 * write N filemarks 1756 */ 1757 int 1758 st_write_filemarks(st, number, flags) 1759 struct st_softc *st; 1760 int flags; 1761 int number; 1762 { 1763 struct scsi_write_filemarks cmd; 1764 1765 /* 1766 * It's hard to write a negative number of file marks. 1767 * Don't try. 1768 */ 1769 if (number < 0) 1770 return (EINVAL); 1771 switch (number) { 1772 case 0: /* really a command to sync the drive's buffers */ 1773 break; 1774 case 1: 1775 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 1776 st->flags &= ~ST_WRITTEN; 1777 else 1778 st->flags |= ST_FM_WRITTEN; 1779 st->flags &= ~ST_PER_ACTION; 1780 break; 1781 default: 1782 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 1783 } 1784 1785 bzero(&cmd, sizeof(cmd)); 1786 cmd.opcode = WRITE_FILEMARKS; 1787 _lto3b(number, cmd.number); 1788 1789 return (scsipi_command(st->sc_link, 1790 (struct scsipi_generic *)&cmd, sizeof(cmd), 1791 0, 0, 0, 100000, NULL, flags)); 1792 } 1793 1794 /* 1795 * Make sure the right number of file marks is on tape if the 1796 * tape has been written. If the position argument is true, 1797 * leave the tape positioned where it was originally. 1798 * 1799 * nmarks returns the number of marks to skip (or, if position 1800 * true, which were skipped) to get back original position. 1801 */ 1802 int 1803 st_check_eod(st, position, nmarks, flags) 1804 struct st_softc *st; 1805 boolean position; 1806 int *nmarks; 1807 int flags; 1808 { 1809 int error; 1810 1811 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 1812 default: 1813 *nmarks = 0; 1814 return (0); 1815 case ST_WRITTEN: 1816 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 1817 *nmarks = 1; 1818 break; 1819 case ST_WRITTEN | ST_2FM_AT_EOD: 1820 *nmarks = 2; 1821 } 1822 error = st_write_filemarks(st, *nmarks, flags); 1823 if (position && !error) 1824 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 1825 return (error); 1826 } 1827 1828 /* 1829 * load/unload/retension 1830 */ 1831 int 1832 st_load(st, type, flags) 1833 struct st_softc *st; 1834 u_int type; 1835 int flags; 1836 { 1837 struct scsi_load cmd; 1838 1839 if (type != LD_LOAD) { 1840 int error; 1841 int nmarks; 1842 1843 error = st_check_eod(st, FALSE, &nmarks, flags); 1844 if (error) 1845 return (error); 1846 } 1847 if (st->quirks & ST_Q_IGNORE_LOADS) 1848 return (0); 1849 1850 bzero(&cmd, sizeof(cmd)); 1851 cmd.opcode = LOAD; 1852 cmd.how = type; 1853 1854 return (scsipi_command(st->sc_link, 1855 (struct scsipi_generic *)&cmd, sizeof(cmd), 1856 0, 0, ST_RETRIES, 300000, NULL, flags)); 1857 } 1858 1859 /* 1860 * Rewind the device 1861 */ 1862 int 1863 st_rewind(st, immediate, flags) 1864 struct st_softc *st; 1865 u_int immediate; 1866 int flags; 1867 { 1868 struct scsi_rewind cmd; 1869 int error; 1870 int nmarks; 1871 1872 error = st_check_eod(st, FALSE, &nmarks, flags); 1873 if (error) 1874 return (error); 1875 st->flags &= ~ST_PER_ACTION; 1876 1877 bzero(&cmd, sizeof(cmd)); 1878 cmd.opcode = REWIND; 1879 cmd.byte2 = immediate; 1880 1881 return (scsipi_command(st->sc_link, 1882 (struct scsipi_generic *)&cmd, sizeof(cmd), 1883 0, 0, ST_RETRIES, immediate ? 5000 : 300000, NULL, flags)); 1884 } 1885 1886 int 1887 st_rdpos(st, hard, blkptr) 1888 struct st_softc *st; 1889 int hard; 1890 u_int32_t *blkptr; 1891 { 1892 int error; 1893 u_int8_t posdata[20]; 1894 struct scsi_tape_read_position cmd; 1895 1896 /* 1897 * First flush any pending writes... 1898 */ 1899 error = st_write_filemarks(st, 0, SCSI_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) 1907 return (error); 1908 1909 bzero(&cmd, sizeof(cmd)); 1910 bzero(&posdata, sizeof(posdata)); 1911 cmd.opcode = READ_POSITION; 1912 if (hard) 1913 cmd.byte1 = 1; 1914 1915 error = scsipi_command(st->sc_link, 1916 (struct scsipi_generic *)&cmd, sizeof(cmd), (u_char *)&posdata, 1917 sizeof(posdata), ST_RETRIES, 30000, NULL, 1918 SCSI_SILENT | SCSI_DATA_IN); 1919 1920 if (error == 0) { 1921 #if 0 1922 printf("posdata:"); 1923 for (hard = 0; hard < sizeof(posdata); hard++) 1924 printf("%02x ", posdata[hard] & 0xff); 1925 printf("\n"); 1926 #endif 1927 if (posdata[0] & 0x4) /* Block Position Unknown */ 1928 error = EINVAL; 1929 else 1930 *blkptr = _4btol(&posdata[4]); 1931 } 1932 return (error); 1933 } 1934 1935 int 1936 st_setpos(st, hard, blkptr) 1937 struct st_softc *st; 1938 int hard; 1939 u_int32_t *blkptr; 1940 { 1941 int error; 1942 struct scsipi_generic cmd; 1943 1944 /* 1945 * First flush any pending writes. Strictly speaking, 1946 * we're not supposed to have to worry about this, 1947 * but let's be untrusting. 1948 */ 1949 error = st_write_filemarks(st, 0, SCSI_SILENT); 1950 1951 /* 1952 * The latter case is for 'write protected' tapes 1953 * which are too stupid to recognize a zero count 1954 * for writing filemarks as a no-op. 1955 */ 1956 if (error != 0 && error != EACCES) 1957 return (error); 1958 1959 bzero(&cmd, sizeof(cmd)); 1960 cmd.opcode = LOCATE; 1961 if (hard) 1962 cmd.bytes[0] = 1 << 2; 1963 _lto4b(*blkptr, &cmd.bytes[2]); 1964 error = scsipi_command(st->sc_link, &cmd, sizeof(cmd), 1965 NULL, 0, ST_RETRIES, 900000, NULL, 0); 1966 /* 1967 * XXX: Note file && block number position now unknown (if 1968 * XXX: these things ever start being maintained in this driver) 1969 */ 1970 return (error); 1971 } 1972 1973 1974 /* 1975 * Look at the returned sense and act on the error and detirmine 1976 * The unix error number to pass back... (0 = report no error) 1977 * (-1 = continue processing) 1978 */ 1979 int 1980 st_interpret_sense(xs) 1981 struct scsipi_xfer *xs; 1982 { 1983 struct scsipi_link *sc_link = xs->sc_link; 1984 struct scsipi_sense_data *sense = &xs->sense.scsi_sense; 1985 struct buf *bp = xs->bp; 1986 struct st_softc *st = sc_link->device_softc; 1987 u_int8_t key; 1988 int32_t info; 1989 1990 /* 1991 * Get the sense fields and work out what code 1992 */ 1993 if (sense->error_code & SSD_ERRCODE_VALID) 1994 info = _4btol(sense->info); 1995 else 1996 info = xs->datalen; /* bad choice if fixed blocks */ 1997 if ((sc_link->flags & SDEV_OPEN) == 0) 1998 return (-1); /* not open yet, let generic handle */ 1999 else if ((sense->error_code & SSD_ERRCODE) != 0x70) 2000 return (-1); /* let the generic code handle it */ 2001 #ifdef SCSIVERBOSE 2002 else if ((xs->flags & SCSI_SILENT) == 0) 2003 scsi_print_sense(xs, 0); /* tell folks what happened */ 2004 #endif 2005 if (st->flags & ST_FIXEDBLOCKS) { 2006 xs->resid = info * st->blksize; 2007 if (sense->flags & SSD_EOM) { 2008 st->flags |= ST_EIO_PENDING; 2009 if (bp) 2010 bp->b_resid = xs->resid; 2011 } 2012 if (sense->flags & SSD_FILEMARK) { 2013 st->flags |= ST_AT_FILEMARK; 2014 if (bp) 2015 bp->b_resid = xs->resid; 2016 } 2017 if (sense->flags & SSD_ILI) { 2018 st->flags |= ST_EIO_PENDING; 2019 if (bp) 2020 bp->b_resid = xs->resid; 2021 if (sense->error_code & SSD_ERRCODE_VALID && 2022 (xs->flags & SCSI_SILENT) == 0) 2023 printf("%s: block wrong size, %d blocks residual\n", 2024 st->sc_dev.dv_xname, info); 2025 2026 /* 2027 * This quirk code helps the drive read 2028 * the first tape block, regardless of 2029 * format. That is required for these 2030 * drives to return proper MODE SENSE 2031 * information. 2032 */ 2033 if ((st->quirks & ST_Q_SENSE_HELP) && 2034 !(sc_link->flags & SDEV_MEDIA_LOADED)) 2035 st->blksize -= 512; 2036 } 2037 /* 2038 * If data wanted and no data was tranfered, do it immediatly 2039 */ 2040 if (xs->datalen && xs->resid >= xs->datalen) { 2041 if (st->flags & ST_EIO_PENDING) 2042 return (EIO); 2043 if (st->flags & ST_AT_FILEMARK) { 2044 if (bp) 2045 bp->b_resid = xs->resid; 2046 return (0); 2047 } 2048 } 2049 } else { /* must be variable mode */ 2050 xs->resid = xs->datalen; /* to be sure */ 2051 if (sense->flags & SSD_EOM) 2052 return (EIO); 2053 if (sense->flags & SSD_FILEMARK) { 2054 if (bp) 2055 bp->b_resid = bp->b_bcount; 2056 return (0); 2057 } 2058 if (sense->flags & SSD_ILI) { 2059 if (info < 0) { 2060 /* 2061 * the record was bigger than the read 2062 */ 2063 if ((xs->flags & SCSI_SILENT) == 0) 2064 printf("%s: %d-byte record too big\n", 2065 st->sc_dev.dv_xname, 2066 xs->datalen - info); 2067 return (EIO); 2068 } 2069 xs->resid = info; 2070 if (bp) 2071 bp->b_resid = info; 2072 } 2073 } 2074 key = sense->flags & SSD_KEY; 2075 2076 if (key == 0x8) { 2077 /* 2078 * This quirk code helps the drive read the 2079 * first tape block, regardless of format. That 2080 * is required for these drives to return proper 2081 * MODE SENSE information. 2082 */ 2083 if ((st->quirks & ST_Q_SENSE_HELP) && 2084 !(sc_link->flags & SDEV_MEDIA_LOADED)) { 2085 /* still starting */ 2086 st->blksize -= 512; 2087 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 2088 st->flags |= ST_BLANK_READ; 2089 xs->resid = xs->datalen; 2090 if (bp) { 2091 bp->b_resid = xs->resid; 2092 /* return an EOF */ 2093 } 2094 return (0); 2095 } 2096 } 2097 return (-1); /* let the default/generic handler handle it */ 2098 } 2099 2100 /* 2101 * The quirk here is that the drive returns some value to st_mode_sense 2102 * incorrectly until the tape has actually passed by the head. 2103 * 2104 * The method is to set the drive to large fixed-block state (user-specified 2105 * density and 1024-byte blocks), then read and rewind to get it to sense the 2106 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 2107 * work, as a last resort, try variable- length blocks. The result will be 2108 * the ability to do an accurate st_mode_sense. 2109 * 2110 * We know we can do a rewind because we just did a load, which implies rewind. 2111 * Rewind seems preferable to space backward if we have a virgin tape. 2112 * 2113 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 2114 * error processing, both part of st_interpret_sense. 2115 */ 2116 int 2117 st_touch_tape(st) 2118 struct st_softc *st; 2119 { 2120 char *buf; 2121 int readsize; 2122 int error; 2123 2124 buf = malloc(1024, M_TEMP, M_NOWAIT); 2125 if (buf == NULL) 2126 return (ENOMEM); 2127 2128 if ((error = st_mode_sense(st, 0)) != 0) 2129 goto bad; 2130 st->blksize = 1024; 2131 do { 2132 switch (st->blksize) { 2133 case 512: 2134 case 1024: 2135 readsize = st->blksize; 2136 st->flags |= ST_FIXEDBLOCKS; 2137 break; 2138 default: 2139 readsize = 1; 2140 st->flags &= ~ST_FIXEDBLOCKS; 2141 } 2142 if ((error = st_mode_select(st, 0)) != 0) 2143 goto bad; 2144 st_read(st, buf, readsize, SCSI_SILENT); /* XXX */ 2145 if ((error = st_rewind(st, 0, 0)) != 0) { 2146 bad: free(buf, M_TEMP); 2147 return (error); 2148 } 2149 } while (readsize != 1 && readsize > st->blksize); 2150 2151 free(buf, M_TEMP); 2152 return (0); 2153 } 2154 2155 int 2156 stdump(dev, blkno, va, size) 2157 dev_t dev; 2158 daddr_t blkno; 2159 caddr_t va; 2160 size_t size; 2161 { 2162 2163 /* Not implemented. */ 2164 return (ENXIO); 2165 } 2166
Indexes created Fri Sep 26 20:09:58 GMT 2025