st.c revision 1.16
1/* $OpenBSD: st.c,v 1.16 1997/07/11 02:18:40 tholo Exp $ */ 2/* $NetBSD: st.c,v 1.71 1997/02/21 23:03:49 thorpej Exp $ */ 3 4/* 5 * Copyright (c) 1994 Charles Hannum. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Charles Hannum. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33/* 34 * Originally written by Julian Elischer (julian@tfs.com) 35 * for TRW Financial Systems for use under the MACH(2.5) operating system. 36 * 37 * TRW Financial Systems, in accordance with their agreement with Carnegie 38 * Mellon University, makes this software available to CMU to distribute 39 * or use in any manner that they see fit as long as this message is kept with 40 * the software. For this reason TFS also grants any other persons or 41 * organisations permission to use or modify this software. 42 * 43 * TFS supplies this software to be publicly redistributed 44 * on the understanding that TFS is not responsible for the correct 45 * functioning of this software in any circumstances. 46 * 47 * Ported to run under 386BSD by Julian Elischer (julian@tfs.com) Sept 1992 48 * major changes by Julian Elischer (julian@jules.dialix.oz.au) May 1993 49 */ 50 51/* 52 * To do: 53 * work out some better way of guessing what a good timeout is going 54 * to be depending on whether we expect to retension or not. 55 */ 56 57#include <sys/types.h> 58#include <sys/param.h> 59#include <sys/systm.h> 60#include <sys/fcntl.h> 61#include <sys/errno.h> 62#include <sys/ioctl.h> 63#include <sys/malloc.h> 64#include <sys/buf.h> 65#include <sys/proc.h> 66#include <sys/user.h> 67#include <sys/mtio.h> 68#include <sys/device.h> 69#include <sys/conf.h> 70 71#include <scsi/scsi_all.h> 72#include <scsi/scsi_tape.h> 73#include <scsi/scsiconf.h> 74 75/* Defines for device specific stuff */ 76#define DEF_FIXED_BSIZE 512 77#define ST_RETRIES 4 /* only on non IO commands */ 78 79#define STMODE(z) ( minor(z) & 0x03) 80#define STDSTY(z) ((minor(z) >> 2) & 0x03) 81#define STUNIT(z) ((minor(z) >> 4) ) 82#define CTLMODE 3 83 84/* 85 * Maximum density code known. 86 */ 87#define SCSI_2_MAX_DENSITY_CODE 0x45 88 89/* 90 * Define various devices that we know mis-behave in some way, 91 * and note how they are bad, so we can correct for them 92 */ 93struct modes { 94 u_int quirks; /* same definitions as in quirkdata */ 95 int blksize; 96 u_int8_t density; 97}; 98 99struct quirkdata { 100 u_int quirks; 101#define ST_Q_FORCE_BLKSIZE 0x0001 102#define ST_Q_SENSE_HELP 0x0002 /* must do READ for good MODE SENSE */ 103#define ST_Q_IGNORE_LOADS 0x0004 104#define ST_Q_BLKSIZE 0x0008 /* variable-block media_blksize > 0 */ 105#define ST_Q_UNIMODAL 0x0010 /* unimode drive rejects mode select */ 106 u_int page_0_size; 107#define MAX_PAGE_0_SIZE 64 108 struct modes modes[4]; 109}; 110 111struct st_quirk_inquiry_pattern { 112 struct scsi_inquiry_pattern pattern; 113 struct quirkdata quirkdata; 114}; 115 116struct st_quirk_inquiry_pattern st_quirk_patterns[] = { 117 {{T_SEQUENTIAL, T_REMOV, 118 " ", " ", " "}, {0, 0, { 119 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 120 {ST_Q_FORCE_BLKSIZE, 512, QIC_24}, /* minor 4-7 */ 121 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_1600}, /* minor 8-11 */ 122 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_6250} /* minor 12-15 */ 123 }}}, 124 {{T_SEQUENTIAL, T_REMOV, 125 "TANDBERG", " TDC 3600 ", ""}, {0, 12, { 126 {0, 0, 0}, /* minor 0-3 */ 127 {ST_Q_FORCE_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 128 {0, 0, QIC_150}, /* minor 8-11 */ 129 {0, 0, QIC_120} /* minor 12-15 */ 130 }}}, 131 {{T_SEQUENTIAL, T_REMOV, 132 "TANDBERG", " TDC 3800 ", ""}, {0, 0, { 133 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 134 {0, 0, QIC_525}, /* minor 4-7 */ 135 {0, 0, QIC_150}, /* minor 8-11 */ 136 {0, 0, QIC_120} /* minor 12-15 */ 137 }}}, 138 /* 139 * At least -005 and -007 need this. I'll assume they all do unless I 140 * hear otherwise. - mycroft, 31MAR1994 141 */ 142 {{T_SEQUENTIAL, T_REMOV, 143 "ARCHIVE ", "VIPER 2525 25462", ""}, {0, 0, { 144 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 145 {ST_Q_SENSE_HELP, 0, QIC_525}, /* minor 4-7 */ 146 {0, 0, QIC_150}, /* minor 8-11 */ 147 {0, 0, QIC_120} /* minor 12-15 */ 148 }}}, 149 /* 150 * One user reports that this works for his tape drive. It probably 151 * needs more work. - mycroft, 09APR1994 152 */ 153 {{T_SEQUENTIAL, T_REMOV, 154 "SANKYO ", "CP525 ", ""}, {0, 0, { 155 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 156 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 157 {0, 0, QIC_150}, /* minor 8-11 */ 158 {0, 0, QIC_120} /* minor 12-15 */ 159 }}}, 160 {{T_SEQUENTIAL, T_REMOV, 161 "ANRITSU ", "DMT780 ", ""}, {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 "ARCHIVE ", "VIPER 150 21247", ""}, {0, 12, { 169 {0, 0, 0}, /* minor 0-3 */ 170 {0, 0, QIC_150}, /* minor 4-7 */ 171 {0, 0, QIC_120}, /* minor 8-11 */ 172 {0, 0, QIC_24} /* minor 12-15 */ 173 }}}, 174 {{T_SEQUENTIAL, T_REMOV, 175 "WANGTEK ", "5099ES SCSI", ""}, {0, 0, { 176 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 177 {0, 0, QIC_11}, /* minor 4-7 */ 178 {0, 0, QIC_24}, /* minor 8-11 */ 179 {0, 0, QIC_24} /* minor 12-15 */ 180 }}}, 181 {{T_SEQUENTIAL, T_REMOV, 182 "WANGTEK ", "5150ES SCSI", ""}, {0, 0, { 183 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 184 {0, 0, QIC_24}, /* minor 4-7 */ 185 {0, 0, QIC_120}, /* minor 8-11 */ 186 {0, 0, QIC_150} /* minor 12-15 */ 187 }}}, 188 {{T_SEQUENTIAL, T_REMOV, 189 "WANGTEK ", "5525ES SCSI REV7", ""}, {0, 0, { 190 {0, 0, 0}, /* minor 0-3 */ 191 {ST_Q_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 192 {0, 0, QIC_150}, /* minor 8-11 */ 193 {0, 0, QIC_120} /* minor 12-15 */ 194 }}}, 195 {{T_SEQUENTIAL, T_REMOV, 196 "WangDAT ", "Model 1300 ", ""}, {0, 0, { 197 {0, 0, 0}, /* minor 0-3 */ 198 {ST_Q_FORCE_BLKSIZE, 512, DDS}, /* minor 4-7 */ 199 {ST_Q_FORCE_BLKSIZE, 1024, DDS}, /* minor 8-11 */ 200 {ST_Q_FORCE_BLKSIZE, 0, DDS} /* minor 12-15 */ 201 }}}, 202 {{T_SEQUENTIAL, T_REMOV, 203 "EXABYTE ", "EXB-8200 ", "263H"}, {0, 5, { 204 {0, 0, 0}, /* minor 0-3 */ 205 {0, 0, 0}, /* minor 4-7 */ 206 {0, 0, 0}, /* minor 8-11 */ 207 {0, 0, 0} /* minor 12-15 */ 208 }}}, 209 {{T_SEQUENTIAL, T_REMOV, 210 "HP ", "T4000s ", ""}, {ST_Q_UNIMODAL, 0, { 211 {0, 0, QIC_3095}, /* minor 0-3 */ 212 {0, 0, QIC_3095}, /* minor 4-7 */ 213 {0, 0, QIC_3095}, /* minor 8-11 */ 214 {0, 0, QIC_3095}, /* minor 12-15 */ 215 }}}, 216#if 0 217 {{T_SEQUENTIAL, T_REMOV, 218 "EXABYTE ", "EXB-8200 ", ""}, {0, 12, { 219 {0, 0, 0}, /* minor 0-3 */ 220 {0, 0, 0}, /* minor 4-7 */ 221 {0, 0, 0}, /* minor 8-11 */ 222 {0, 0, 0} /* minor 12-15 */ 223 }}}, 224#endif 225 {{T_SEQUENTIAL, T_REMOV, 226 "WANGTEK ", "5150ES SCSI FA15\0""01 A", "????"}, {0, 0, { 227 {0, ST_Q_IGNORE_LOADS, 0}, /* minor 0-3 */ 228 {0, 0, 0}, /* minor 4-7 */ 229 {0, 0, 0}, /* minor 8-11 */ 230 {0, 0, 0} /* minor 12-15 */ 231 }}}, 232}; 233 234#define NOEJECT 0 235#define EJECT 1 236 237#define NOREWIND 0 238#define REWIND 1 239 240struct st_softc { 241 struct device sc_dev; 242/*--------------------present operating parameters, flags etc.----------------*/ 243 int flags; /* see below */ 244 u_int quirks; /* quirks for the open mode */ 245 int blksize; /* blksize we are using */ 246 u_int8_t density; /* present density */ 247 u_int page_0_size; /* size of page 0 data */ 248 u_int last_dsty; /* last density opened */ 249/*--------------------device/scsi parameters----------------------------------*/ 250 struct scsi_link *sc_link; /* our link to the adpter etc. */ 251/*--------------------parameters reported by the device ----------------------*/ 252 int blkmin; /* min blk size */ 253 int blkmax; /* max blk size */ 254 struct quirkdata *quirkdata; /* if we have a rogue entry */ 255/*--------------------parameters reported by the device for this media--------*/ 256 u_long numblks; /* nominal blocks capacity */ 257 int media_blksize; /* 0 if not ST_FIXEDBLOCKS */ 258 u_int8_t media_density; /* this is what it said when asked */ 259/*--------------------quirks for the whole drive------------------------------*/ 260 u_int drive_quirks; /* quirks of this drive */ 261/*--------------------How we should set up when opening each minor device----*/ 262 struct modes modes[4]; /* plus more for each mode */ 263 u_int8_t modeflags[4]; /* flags for the modes */ 264#define DENSITY_SET_BY_USER 0x01 265#define DENSITY_SET_BY_QUIRK 0x02 266#define BLKSIZE_SET_BY_USER 0x04 267#define BLKSIZE_SET_BY_QUIRK 0x08 268/*--------------------storage for sense data returned by the drive------------*/ 269 u_char sense_data[MAX_PAGE_0_SIZE]; /* 270 * additional sense data needed 271 * for mode sense/select. 272 */ 273 struct buf buf_queue; /* the queue of pending IO operations */ 274}; 275 276 277int stmatch __P((struct device *, void *, void *)); 278void stattach __P((struct device *, struct device *, void *)); 279void st_identify_drive __P((struct st_softc *, struct scsi_inquiry_data *)); 280void st_loadquirks __P((struct st_softc *)); 281int st_mount_tape __P((dev_t, int)); 282void st_unmount __P((struct st_softc *, boolean, boolean)); 283int st_decide_mode __P((struct st_softc *, boolean)); 284void ststart __P((void *)); 285int st_read __P((struct st_softc *, char *, int, int)); 286int st_read_block_limits __P((struct st_softc *, int)); 287int st_mode_sense __P((struct st_softc *, int)); 288int st_mode_select __P((struct st_softc *, int)); 289int st_space __P((struct st_softc *, int, u_int, int)); 290int st_write_filemarks __P((struct st_softc *, int, int)); 291int st_check_eod __P((struct st_softc *, boolean, int *, int)); 292int st_load __P((struct st_softc *, u_int, int)); 293int st_rewind __P((struct st_softc *, u_int, int)); 294int st_interpret_sense __P((struct scsi_xfer *)); 295int st_touch_tape __P((struct st_softc *)); 296int st_erase __P((struct st_softc *, int full, int flags)); 297 298struct cfattach st_ca = { 299 sizeof(struct st_softc), stmatch, stattach 300}; 301 302struct cfdriver st_cd = { 303 NULL, "st", DV_TAPE 304}; 305 306struct scsi_device st_switch = { 307 st_interpret_sense, 308 ststart, 309 NULL, 310 NULL, 311}; 312 313#define ST_INFO_VALID 0x0001 314#define ST_BLOCK_SET 0x0002 /* block size, mode set by ioctl */ 315#define ST_WRITTEN 0x0004 /* data have been written, EOD needed */ 316#define ST_FIXEDBLOCKS 0x0008 317#define ST_AT_FILEMARK 0x0010 318#define ST_EIO_PENDING 0x0020 /* we couldn't report it then (had data) */ 319#define ST_NEW_MOUNT 0x0040 /* still need to decide mode */ 320#define ST_READONLY 0x0080 /* st_mode_sense says write protected */ 321#define ST_FM_WRITTEN 0x0100 /* 322 * EOF file mark written -- used with 323 * ~ST_WRITTEN to indicate that multiple file 324 * marks have been written 325 */ 326#define ST_BLANK_READ 0x0200 /* BLANK CHECK encountered already */ 327#define ST_2FM_AT_EOD 0x0400 /* write 2 file marks at EOD */ 328#define ST_MOUNTED 0x0800 /* Device is presently mounted */ 329#define ST_DONTBUFFER 0x1000 /* Disable buffering/caching */ 330 331#define ST_PER_ACTION (ST_AT_FILEMARK | ST_EIO_PENDING | ST_BLANK_READ) 332#define ST_PER_MOUNT (ST_INFO_VALID | ST_BLOCK_SET | ST_WRITTEN | \ 333 ST_FIXEDBLOCKS | ST_READONLY | ST_FM_WRITTEN | \ 334 ST_2FM_AT_EOD | ST_PER_ACTION) 335 336struct scsi_inquiry_pattern st_patterns[] = { 337 {T_SEQUENTIAL, T_REMOV, 338 "", "", ""}, 339}; 340 341int 342stmatch(parent, match, aux) 343 struct device *parent; 344 void *match, *aux; 345{ 346 struct scsibus_attach_args *sa = aux; 347 int priority; 348 349 (void)scsi_inqmatch(sa->sa_inqbuf, 350 (caddr_t)st_patterns, sizeof(st_patterns)/sizeof(st_patterns[0]), 351 sizeof(st_patterns[0]), &priority); 352 return (priority); 353} 354 355/* 356 * The routine called by the low level scsi routine when it discovers 357 * A device suitable for this driver 358 */ 359void 360stattach(parent, self, aux) 361 struct device *parent, *self; 362 void *aux; 363{ 364 struct st_softc *st = (void *)self; 365 struct scsibus_attach_args *sa = aux; 366 struct scsi_link *sc_link = sa->sa_sc_link; 367 368 SC_DEBUG(sc_link, SDEV_DB2, ("stattach: ")); 369 370 /* 371 * Store information needed to contact our base driver 372 */ 373 st->sc_link = sc_link; 374 sc_link->device = &st_switch; 375 sc_link->device_softc = st; 376 sc_link->openings = 1; 377 378 /* 379 * Check if the drive is a known criminal and take 380 * Any steps needed to bring it into line 381 */ 382 st_identify_drive(st, sa->sa_inqbuf); 383 384 /* 385 * Use the subdriver to request information regarding 386 * the drive. We cannot use interrupts yet, so the 387 * request must specify this. 388 */ 389 printf("\n"); 390 printf("%s: %s", st->sc_dev.dv_xname, st->quirkdata ? "rogue, " : ""); 391 if (scsi_test_unit_ready(sc_link, 392 SCSI_AUTOCONF | SCSI_SILENT | SCSI_IGNORE_MEDIA_CHANGE) || 393 st_mode_sense(st, 394 SCSI_AUTOCONF | SCSI_SILENT | SCSI_IGNORE_MEDIA_CHANGE)) 395 printf("drive empty\n"); 396 else { 397 printf("density code 0x%x, ", st->media_density); 398 if (st->media_blksize > 0) 399 printf("%d-byte", st->media_blksize); 400 else 401 printf("variable"); 402 printf(" blocks, write-%s\n", 403 (st->flags & ST_READONLY) ? "protected" : "enabled"); 404 } 405 406 /* 407 * Set up the buf queue for this device 408 */ 409 st->buf_queue.b_active = 0; 410 st->buf_queue.b_actf = 0; 411 st->buf_queue.b_actb = &st->buf_queue.b_actf; 412 413 /* 414 * Reset the media loaded flag, sometimes the data 415 * aquired at boot time is not quite accurate. This 416 * will be checked again at the first open. 417 */ 418 sc_link->flags &= ~SDEV_MEDIA_LOADED; 419} 420 421/* 422 * Use the inquiry routine in 'scsi_base' to get drive info so we can 423 * Further tailor our behaviour. 424 */ 425void 426st_identify_drive(st, inqbuf) 427 struct st_softc *st; 428 struct scsi_inquiry_data *inqbuf; 429{ 430 struct st_quirk_inquiry_pattern *finger; 431 int priority; 432 433 finger = (struct st_quirk_inquiry_pattern *)scsi_inqmatch(inqbuf, 434 (caddr_t)st_quirk_patterns, 435 sizeof(st_quirk_patterns)/sizeof(st_quirk_patterns[0]), 436 sizeof(st_quirk_patterns[0]), &priority); 437 if (priority != 0) { 438 st->quirkdata = &finger->quirkdata; 439 st->drive_quirks = finger->quirkdata.quirks; 440 st->quirks = finger->quirkdata.quirks; /* start value */ 441 st->page_0_size = finger->quirkdata.page_0_size; 442 st_loadquirks(st); 443 } 444} 445 446/* 447 * initialise the subdevices to the default (QUIRK) state. 448 * this will remove any setting made by the system operator or previous 449 * operations. 450 */ 451void 452st_loadquirks(st) 453 struct st_softc *st; 454{ 455 int i; 456 struct modes *mode; 457 struct modes *mode2; 458 459 mode = st->quirkdata->modes; 460 mode2 = st->modes; 461 for (i = 0; i < 4; i++) { 462 bzero(mode2, sizeof(struct modes)); 463 st->modeflags[i] &= ~(BLKSIZE_SET_BY_QUIRK | 464 DENSITY_SET_BY_QUIRK | BLKSIZE_SET_BY_USER | 465 DENSITY_SET_BY_USER); 466 if ((mode->quirks | st->drive_quirks) & ST_Q_FORCE_BLKSIZE) { 467 mode2->blksize = mode->blksize; 468 st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; 469 } 470 if (mode->density) { 471 mode2->density = mode->density; 472 st->modeflags[i] |= DENSITY_SET_BY_QUIRK; 473 } 474 mode++; 475 mode2++; 476 } 477} 478 479/* 480 * open the device. 481 */ 482int 483stopen(dev, flags, mode, p) 484 dev_t dev; 485 int flags; 486 int mode; 487 struct proc *p; 488{ 489 int unit; 490 u_int stmode, dsty; 491 int error = 0; 492 struct st_softc *st; 493 struct scsi_link *sc_link; 494 495 unit = STUNIT(dev); 496 if (unit >= st_cd.cd_ndevs) 497 return ENXIO; 498 st = st_cd.cd_devs[unit]; 499 if (!st) 500 return ENXIO; 501 502 stmode = STMODE(dev); 503 dsty = STDSTY(dev); 504 sc_link = st->sc_link; 505 506 SC_DEBUG(sc_link, SDEV_DB1, ("open: dev=0x%x (unit %d (of %d))\n", dev, 507 unit, st_cd.cd_ndevs)); 508 509 /* 510 * Only allow one at a time 511 */ 512 if (sc_link->flags & SDEV_OPEN) { 513 printf("%s: already open\n", st->sc_dev.dv_xname); 514 return EBUSY; 515 } 516 517 /* 518 * Catch any unit attention errors. 519 */ 520 error = scsi_test_unit_ready(sc_link, 521 SCSI_IGNORE_MEDIA_CHANGE | 522 (stmode == CTLMODE ? 523 SCSI_IGNORE_NOT_READY : 0)); 524 if (error) 525 goto bad; 526 527 sc_link->flags |= SDEV_OPEN; /* unit attn are now errors */ 528 529 /* 530 * If the mode is 3 (e.g. minor = 3,7,11,15) 531 * then the device has been opened to set defaults 532 * This mode does NOT ALLOW I/O, only ioctls 533 */ 534 if (stmode == CTLMODE) 535 return 0; 536 537 /* 538 * if it's a different mode, or if the media has been 539 * invalidated, unmount the tape from the previous 540 * session but continue with open processing 541 */ 542 if (st->last_dsty != dsty || !(sc_link->flags & SDEV_MEDIA_LOADED)) 543 st_unmount(st, NOEJECT, REWIND); 544 545 /* 546 * If we are not mounted, then we should start a new 547 * mount session. 548 */ 549 if (!(st->flags & ST_MOUNTED)) { 550 st_mount_tape(dev, flags); 551 st->last_dsty = dsty; 552 } 553 554 /* 555 * Make sure that a tape opened in write-only mode will have 556 * file marks written on it when closed, even if not written to. 557 * This is for SUN compatibility 558 */ 559 if ((flags & O_ACCMODE) == FWRITE) 560 st->flags |= ST_WRITTEN; 561 562 SC_DEBUG(sc_link, SDEV_DB2, ("open complete\n")); 563 return 0; 564 565bad: 566 st_unmount(st, NOEJECT, REWIND); 567 sc_link->flags &= ~SDEV_OPEN; 568 return error; 569} 570 571/* 572 * close the device.. only called if we are the LAST 573 * occurence of an open device 574 */ 575int 576stclose(dev, flags, mode, p) 577 dev_t dev; 578 int flags; 579 int mode; 580 struct proc *p; 581{ 582 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 583 584 SC_DEBUG(st->sc_link, SDEV_DB1, ("closing\n")); 585 if ((st->flags & (ST_WRITTEN | ST_FM_WRITTEN)) == ST_WRITTEN) 586 st_write_filemarks(st, 1, 0); 587 switch (STMODE(dev)) { 588 case 0: /* normal */ 589 st_unmount(st, NOEJECT, REWIND); 590 break; 591 case 3: /* eject, no rewind */ 592 st_unmount(st, EJECT, NOREWIND); 593 break; 594 case 1: /* no rewind */ 595 st_unmount(st, NOEJECT, NOREWIND); 596 break; 597 case 2: /* rewind, eject */ 598 st_unmount(st, EJECT, REWIND); 599 break; 600 } 601 st->sc_link->flags &= ~SDEV_OPEN; 602 603 return 0; 604} 605 606/* 607 * Start a new mount session. 608 * Copy in all the default parameters from the selected device mode. 609 * and try guess any that seem to be defaulted. 610 */ 611int 612st_mount_tape(dev, flags) 613 dev_t dev; 614 int flags; 615{ 616 int unit; 617 u_int mode, dsty; 618 struct st_softc *st; 619 struct scsi_link *sc_link; 620 int error = 0; 621 622 unit = STUNIT(dev); 623 mode = STMODE(dev); 624 dsty = STDSTY(dev); 625 st = st_cd.cd_devs[unit]; 626 sc_link = st->sc_link; 627 628 if (st->flags & ST_MOUNTED) 629 return 0; 630 631 SC_DEBUG(sc_link, SDEV_DB1, ("mounting\n ")); 632 st->flags |= ST_NEW_MOUNT; 633 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 634 /* 635 * If the media is new, then make sure we give it a chance to 636 * to do a 'load' instruction. (We assume it is new.) 637 */ 638 if ((error = st_load(st, LD_LOAD, 0)) != 0) 639 return error; 640 /* 641 * Throw another dummy instruction to catch 642 * 'Unit attention' errors. Some drives appear to give 643 * these after doing a Load instruction. 644 * (noteably some DAT drives) 645 */ 646 scsi_test_unit_ready(sc_link, SCSI_SILENT); /* XXX */ 647 648 /* 649 * Some devices can't tell you much until they have been 650 * asked to look at the media. This quirk does this. 651 */ 652 if (st->quirks & ST_Q_SENSE_HELP) 653 if ((error = st_touch_tape(st)) != 0) 654 return error; 655 /* 656 * Load the physical device parameters 657 * loads: blkmin, blkmax 658 */ 659 if ((error = st_read_block_limits(st, 0)) != 0) 660 return error; 661 /* 662 * Load the media dependent parameters 663 * includes: media_blksize,media_density,numblks 664 * As we have a tape in, it should be reflected here. 665 * If not you may need the "quirk" above. 666 */ 667 if ((error = st_mode_sense(st, 0)) != 0) 668 return error; 669 /* 670 * If we have gained a permanent density from somewhere, 671 * then use it in preference to the one supplied by 672 * default by the driver. 673 */ 674 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 675 st->density = st->modes[dsty].density; 676 else 677 st->density = st->media_density; 678 /* 679 * If we have gained a permanent blocksize 680 * then use it in preference to the one supplied by 681 * default by the driver. 682 */ 683 st->flags &= ~ST_FIXEDBLOCKS; 684 if (st->modeflags[dsty] & (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 685 st->blksize = st->modes[dsty].blksize; 686 if (st->blksize) 687 st->flags |= ST_FIXEDBLOCKS; 688 } else { 689 if ((error = st_decide_mode(st, FALSE)) != 0) 690 return error; 691 } 692 if ((error = st_mode_select(st, 0)) != 0) { 693 printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); 694 return error; 695 } 696 scsi_prevent(sc_link, PR_PREVENT, 697 SCSI_IGNORE_ILLEGAL_REQUEST | SCSI_IGNORE_NOT_READY); 698 st->flags &= ~ST_NEW_MOUNT; 699 st->flags |= ST_MOUNTED; 700 sc_link->flags |= SDEV_MEDIA_LOADED; /* move earlier? */ 701 702 return 0; 703} 704 705/* 706 * End the present mount session. 707 * Rewind, and optionally eject the tape. 708 * Reset various flags to indicate that all new 709 * operations require another mount operation 710 */ 711void 712st_unmount(st, eject, rewind) 713 struct st_softc *st; 714 boolean eject, rewind; 715{ 716 struct scsi_link *sc_link = st->sc_link; 717 int nmarks; 718 719 if (!(st->flags & ST_MOUNTED)) 720 return; 721 SC_DEBUG(sc_link, SDEV_DB1, ("unmounting\n")); 722 st_check_eod(st, FALSE, &nmarks, SCSI_IGNORE_NOT_READY); 723 if (rewind) 724 st_rewind(st, 0, SCSI_IGNORE_NOT_READY); 725 scsi_prevent(sc_link, PR_ALLOW, 726 SCSI_IGNORE_ILLEGAL_REQUEST | SCSI_IGNORE_NOT_READY); 727 if (eject) 728 st_load(st, LD_UNLOAD, SCSI_IGNORE_NOT_READY); 729 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 730 sc_link->flags &= ~SDEV_MEDIA_LOADED; 731} 732 733/* 734 * Given all we know about the device, media, mode, 'quirks' and 735 * initial operation, make a decision as to how we should be set 736 * to run (regarding blocking and EOD marks) 737 */ 738int 739st_decide_mode(st, first_read) 740 struct st_softc *st; 741 boolean first_read; 742{ 743#ifdef SCSIDEBUG 744 struct scsi_link *sc_link = st->sc_link; 745#endif 746 747 SC_DEBUG(sc_link, SDEV_DB2, ("starting block mode decision\n")); 748 749 /* 750 * If the drive can only handle fixed-length blocks and only at 751 * one size, perhaps we should just do that. 752 */ 753 if (st->blkmin && (st->blkmin == st->blkmax)) { 754 st->flags |= ST_FIXEDBLOCKS; 755 st->blksize = st->blkmin; 756 SC_DEBUG(sc_link, SDEV_DB3, 757 ("blkmin == blkmax of %d\n", st->blkmin)); 758 goto done; 759 } 760 /* 761 * If the tape density mandates (or even suggests) use of fixed 762 * or variable-length blocks, comply. 763 */ 764 switch (st->density) { 765 case HALFINCH_800: 766 case HALFINCH_1600: 767 case HALFINCH_6250: 768 case DDS: 769 st->flags &= ~ST_FIXEDBLOCKS; 770 st->blksize = 0; 771 SC_DEBUG(sc_link, SDEV_DB3, ("density specified variable\n")); 772 goto done; 773 case QIC_11: 774 case QIC_24: 775 case QIC_120: 776 case QIC_150: 777 case QIC_525: 778 case QIC_1320: 779 st->flags |= ST_FIXEDBLOCKS; 780 if (st->media_blksize > 0) 781 st->blksize = st->media_blksize; 782 else 783 st->blksize = DEF_FIXED_BSIZE; 784 SC_DEBUG(sc_link, SDEV_DB3, ("density specified fixed\n")); 785 goto done; 786 } 787 /* 788 * If we're about to read the tape, perhaps we should choose 789 * fixed or variable-length blocks and block size according to 790 * what the drive found on the tape. 791 */ 792 if (first_read && 793 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 794 (st->media_blksize == DEF_FIXED_BSIZE) || 795 (st->media_blksize == 1024))) { 796 if (st->media_blksize > 0) 797 st->flags |= ST_FIXEDBLOCKS; 798 else 799 st->flags &= ~ST_FIXEDBLOCKS; 800 st->blksize = st->media_blksize; 801 SC_DEBUG(sc_link, SDEV_DB3, 802 ("Used media_blksize of %d\n", st->media_blksize)); 803 goto done; 804 } 805 /* 806 * We're getting no hints from any direction. Choose variable- 807 * length blocks arbitrarily. 808 */ 809 st->flags &= ~ST_FIXEDBLOCKS; 810 st->blksize = 0; 811 SC_DEBUG(sc_link, SDEV_DB3, 812 ("Give up and default to variable mode\n")); 813 814done: 815 /* 816 * Decide whether or not to write two file marks to signify end- 817 * of-data. Make the decision as a function of density. If 818 * the decision is not to use a second file mark, the SCSI BLANK 819 * CHECK condition code will be recognized as end-of-data when 820 * first read. 821 * (I think this should be a by-product of fixed/variable..julian) 822 */ 823 switch (st->density) { 824/* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 825 case QIC_11: 826 case QIC_24: 827 case QIC_120: 828 case QIC_150: 829 case QIC_525: 830 case QIC_1320: 831 st->flags &= ~ST_2FM_AT_EOD; 832 break; 833 default: 834 st->flags |= ST_2FM_AT_EOD; 835 } 836 return 0; 837} 838 839/* 840 * Actually translate the requested transfer into 841 * one the physical driver can understand 842 * The transfer is described by a buf and will include 843 * only one physical transfer. 844 */ 845void 846ststrategy(bp) 847 struct buf *bp; 848{ 849 struct st_softc *st = st_cd.cd_devs[STUNIT(bp->b_dev)]; 850 struct buf *dp; 851 int s; 852 853 SC_DEBUG(st->sc_link, SDEV_DB1, 854 ("ststrategy %ld bytes @ blk %d\n", bp->b_bcount, bp->b_blkno)); 855 /* 856 * If it's a null transfer, return immediatly 857 */ 858 if (bp->b_bcount == 0) 859 goto done; 860 /* 861 * Odd sized request on fixed drives are verboten 862 */ 863 if (st->flags & ST_FIXEDBLOCKS) { 864 if (bp->b_bcount % st->blksize) { 865 printf("%s: bad request, must be multiple of %d\n", 866 st->sc_dev.dv_xname, st->blksize); 867 bp->b_error = EIO; 868 goto bad; 869 } 870 } 871 /* 872 * as are out-of-range requests on variable drives. 873 */ 874 else if (bp->b_bcount < st->blkmin || 875 (st->blkmax && bp->b_bcount > st->blkmax)) { 876 printf("%s: bad request, must be between %d and %d\n", 877 st->sc_dev.dv_xname, st->blkmin, st->blkmax); 878 bp->b_error = EIO; 879 goto bad; 880 } 881 s = splbio(); 882 883 /* 884 * Place it in the queue of activities for this tape 885 * at the end (a bit silly because we only have on user.. 886 * (but it could fork())) 887 */ 888 dp = &st->buf_queue; 889 bp->b_actf = NULL; 890 bp->b_actb = dp->b_actb; 891 *dp->b_actb = bp; 892 dp->b_actb = &bp->b_actf; 893 894 /* 895 * Tell the device to get going on the transfer if it's 896 * not doing anything, otherwise just wait for completion 897 * (All a bit silly if we're only allowing 1 open but..) 898 */ 899 ststart(st); 900 901 splx(s); 902 return; 903bad: 904 bp->b_flags |= B_ERROR; 905done: 906 /* 907 * Correctly set the buf to indicate a completed xfer 908 */ 909 bp->b_resid = bp->b_bcount; 910 biodone(bp); 911 return; 912} 913 914/* 915 * ststart looks to see if there is a buf waiting for the device 916 * and that the device is not already busy. If both are true, 917 * It dequeues the buf and creates a scsi command to perform the 918 * transfer required. The transfer request will call scsi_done 919 * on completion, which will in turn call this routine again 920 * so that the next queued transfer is performed. 921 * The bufs are queued by the strategy routine (ststrategy) 922 * 923 * This routine is also called after other non-queued requests 924 * have been made of the scsi driver, to ensure that the queue 925 * continues to be drained. 926 * ststart() is called at splbio 927 */ 928void 929ststart(v) 930 void *v; 931{ 932 struct st_softc *st = v; 933 struct scsi_link *sc_link = st->sc_link; 934 register struct buf *bp, *dp; 935 struct scsi_rw_tape cmd; 936 int flags; 937 938 SC_DEBUG(sc_link, SDEV_DB2, ("ststart ")); 939 /* 940 * See if there is a buf to do and we are not already 941 * doing one 942 */ 943 while (sc_link->openings > 0) { 944 /* if a special awaits, let it proceed first */ 945 if (sc_link->flags & SDEV_WAITING) { 946 sc_link->flags &= ~SDEV_WAITING; 947 wakeup((caddr_t)sc_link); 948 return; 949 } 950 951 dp = &st->buf_queue; 952 if ((bp = dp->b_actf) == NULL) 953 return; 954 if ((dp = bp->b_actf) != NULL) 955 dp->b_actb = bp->b_actb; 956 else 957 st->buf_queue.b_actb = bp->b_actb; 958 *bp->b_actb = dp; 959 960 /* 961 * if the device has been unmounted by the user 962 * then throw away all requests until done 963 */ 964 if (!(st->flags & ST_MOUNTED) || 965 !(sc_link->flags & SDEV_MEDIA_LOADED)) { 966 /* make sure that one implies the other.. */ 967 sc_link->flags &= ~SDEV_MEDIA_LOADED; 968 bp->b_flags |= B_ERROR; 969 bp->b_resid = bp->b_bcount; 970 bp->b_error = EIO; 971 biodone(bp); 972 continue; 973 } 974 /* 975 * only FIXEDBLOCK devices have pending operations 976 */ 977 if (st->flags & ST_FIXEDBLOCKS) { 978 /* 979 * If we are at a filemark but have not reported it yet 980 * then we should report it now 981 */ 982 if (st->flags & ST_AT_FILEMARK) { 983 if ((bp->b_flags & B_READ) == B_WRITE) { 984 /* 985 * Handling of ST_AT_FILEMARK in 986 * st_space will fill in the right file 987 * mark count. 988 * Back up over filemark 989 */ 990 if (st_space(st, 0, SP_FILEMARKS, 0)) { 991 bp->b_flags |= B_ERROR; 992 bp->b_resid = bp->b_bcount; 993 bp->b_error = EIO; 994 biodone(bp); 995 continue; 996 } 997 } else { 998 bp->b_resid = bp->b_bcount; 999 bp->b_error = 0; 1000 bp->b_flags &= ~B_ERROR; 1001 st->flags &= ~ST_AT_FILEMARK; 1002 biodone(bp); 1003 continue; /* seek more work */ 1004 } 1005 } 1006 /* 1007 * If we are at EIO (e.g. EOM) but have not reported it 1008 * yet then we should report it now 1009 */ 1010 if (st->flags & ST_EIO_PENDING) { 1011 bp->b_resid = bp->b_bcount; 1012 bp->b_error = EIO; 1013 bp->b_flags |= B_ERROR; 1014 st->flags &= ~ST_EIO_PENDING; 1015 biodone(bp); 1016 continue; /* seek more work */ 1017 } 1018 } 1019 1020 /* 1021 * Fill out the scsi command 1022 */ 1023 bzero(&cmd, sizeof(cmd)); 1024 if ((bp->b_flags & B_READ) == B_WRITE) { 1025 cmd.opcode = WRITE; 1026 st->flags &= ~ST_FM_WRITTEN; 1027 st->flags |= ST_WRITTEN; 1028 flags = SCSI_DATA_OUT; 1029 } else { 1030 cmd.opcode = READ; 1031 flags = SCSI_DATA_IN; 1032 } 1033 1034 /* 1035 * Handle "fixed-block-mode" tape drives by using the 1036 * block count instead of the length. 1037 */ 1038 if (st->flags & ST_FIXEDBLOCKS) { 1039 cmd.byte2 |= SRW_FIXED; 1040 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1041 } else 1042 _lto3b(bp->b_bcount, cmd.len); 1043 1044 /* 1045 * go ask the adapter to do all this for us 1046 */ 1047 if (scsi_scsi_cmd(sc_link, (struct scsi_generic *) &cmd, 1048 sizeof(cmd), (u_char *) bp->b_data, bp->b_bcount, 0, 1049 100000, bp, flags | SCSI_NOSLEEP)) 1050 printf("%s: not queued\n", st->sc_dev.dv_xname); 1051 } /* go back and see if we can cram more work in.. */ 1052} 1053 1054int 1055stread(dev, uio, iomode) 1056 dev_t dev; 1057 struct uio *uio; 1058 int iomode; 1059{ 1060 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1061 1062 return (physio(ststrategy, NULL, dev, B_READ, 1063 st->sc_link->adapter->scsi_minphys, uio)); 1064} 1065 1066int 1067stwrite(dev, uio, iomode) 1068 dev_t dev; 1069 struct uio *uio; 1070 int iomode; 1071{ 1072 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1073 1074 return (physio(ststrategy, NULL, dev, B_WRITE, 1075 st->sc_link->adapter->scsi_minphys, uio)); 1076} 1077 1078/* 1079 * Perform special action on behalf of the user; 1080 * knows about the internals of this device 1081 */ 1082int 1083stioctl(dev, cmd, arg, flag, p) 1084 dev_t dev; 1085 u_long cmd; 1086 caddr_t arg; 1087 int flag; 1088 struct proc *p; 1089{ 1090 int error = 0; 1091 int unit; 1092 int number, nmarks, dsty; 1093 int flags; 1094 struct st_softc *st; 1095 int hold_blksize; 1096 u_int8_t hold_density; 1097 struct mtop *mt = (struct mtop *) arg; 1098 1099 /* 1100 * Find the device that the user is talking about 1101 */ 1102 flags = 0; /* give error messages, act on errors etc. */ 1103 unit = STUNIT(dev); 1104 dsty = STDSTY(dev); 1105 st = st_cd.cd_devs[unit]; 1106 hold_blksize = st->blksize; 1107 hold_density = st->density; 1108 1109 switch (cmd) { 1110 1111 case MTIOCGET: { 1112 struct mtget *g = (struct mtget *) arg; 1113 1114 SC_DEBUG(st->sc_link, SDEV_DB1, ("[ioctl: get status]\n")); 1115 bzero(g, sizeof(struct mtget)); 1116 g->mt_type = 0x7; /* Ultrix compat *//*? */ 1117 g->mt_blksiz = st->blksize; 1118 g->mt_density = st->density; 1119 g->mt_mblksiz[0] = st->modes[0].blksize; 1120 g->mt_mblksiz[1] = st->modes[1].blksize; 1121 g->mt_mblksiz[2] = st->modes[2].blksize; 1122 g->mt_mblksiz[3] = st->modes[3].blksize; 1123 g->mt_mdensity[0] = st->modes[0].density; 1124 g->mt_mdensity[1] = st->modes[1].density; 1125 g->mt_mdensity[2] = st->modes[2].density; 1126 g->mt_mdensity[3] = st->modes[3].density; 1127 break; 1128 } 1129 case MTIOCTOP: { 1130 1131 SC_DEBUG(st->sc_link, SDEV_DB1, 1132 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, mt->mt_count)); 1133 1134 /* compat: in U*x it is a short */ 1135 number = mt->mt_count; 1136 switch ((short) (mt->mt_op)) { 1137 case MTWEOF: /* write an end-of-file record */ 1138 error = st_write_filemarks(st, number, flags); 1139 break; 1140 case MTBSF: /* backward space file */ 1141 number = -number; 1142 case MTFSF: /* forward space file */ 1143 error = st_check_eod(st, FALSE, &nmarks, flags); 1144 if (!error) 1145 error = st_space(st, number - nmarks, 1146 SP_FILEMARKS, flags); 1147 break; 1148 case MTBSR: /* backward space record */ 1149 number = -number; 1150 case MTFSR: /* forward space record */ 1151 error = st_check_eod(st, TRUE, &nmarks, flags); 1152 if (!error) 1153 error = st_space(st, number, SP_BLKS, flags); 1154 break; 1155 case MTREW: /* rewind */ 1156 error = st_rewind(st, 0, flags); 1157 break; 1158 case MTOFFL: /* rewind and put the drive offline */ 1159 st_unmount(st, EJECT, REWIND); 1160 break; 1161 case MTNOP: /* no operation, sets status only */ 1162 break; 1163 case MTRETEN: /* retension the tape */ 1164 error = st_load(st, LD_RETENSION, flags); 1165 if (!error) 1166 error = st_load(st, LD_LOAD, flags); 1167 break; 1168 case MTEOM: /* forward space to end of media */ 1169 error = st_check_eod(st, FALSE, &nmarks, flags); 1170 if (!error) 1171 error = st_space(st, 1, SP_EOM, flags); 1172 break; 1173 case MTCACHE: /* enable controller cache */ 1174 st->flags &= ~ST_DONTBUFFER; 1175 goto try_new_value; 1176 case MTNOCACHE: /* disable controller cache */ 1177 st->flags |= ST_DONTBUFFER; 1178 goto try_new_value; 1179 case MTERASE: /* erase volume */ 1180 error = st_erase(st, number, flags); 1181 break; 1182 case MTSETBSIZ: /* Set block size for device */ 1183#ifdef NOTYET 1184 if (!(st->flags & ST_NEW_MOUNT)) { 1185 uprintf("re-mount tape before changing blocksize"); 1186 error = EINVAL; 1187 break; 1188 } 1189#endif 1190 if (number == 0) { 1191 st->flags &= ~ST_FIXEDBLOCKS; 1192 } else { 1193 if ((st->blkmin || st->blkmax) && 1194 (number < st->blkmin || 1195 number > st->blkmax)) { 1196 error = EINVAL; 1197 break; 1198 } 1199 st->flags |= ST_FIXEDBLOCKS; 1200 } 1201 st->blksize = number; 1202 st->flags |= ST_BLOCK_SET; /*XXX */ 1203 goto try_new_value; 1204 1205 case MTSETDNSTY: /* Set density for device and mode */ 1206 if (number > SCSI_2_MAX_DENSITY_CODE) { 1207 error = EINVAL; 1208 break; 1209 } else 1210 st->density = number; 1211 goto try_new_value; 1212 1213 default: 1214 error = EINVAL; 1215 } 1216 break; 1217 } 1218 case MTIOCIEOT: 1219 case MTIOCEEOT: 1220 break; 1221 default: 1222 if (STMODE(dev) == CTLMODE) 1223 error = scsi_do_safeioctl(st->sc_link, dev, 1224 cmd, arg, flag, p); 1225 else 1226 error = ENOTTY; 1227 break; 1228 } 1229 return error; 1230/*-----------------------------*/ 1231try_new_value: 1232 /* 1233 * Check that the mode being asked for is aggreeable to the 1234 * drive. If not, put it back the way it was. 1235 */ 1236 if ((error = st_mode_select(st, 0)) != 0) {/* put it back as it was */ 1237 printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); 1238 st->density = hold_density; 1239 st->blksize = hold_blksize; 1240 if (st->blksize) 1241 st->flags |= ST_FIXEDBLOCKS; 1242 else 1243 st->flags &= ~ST_FIXEDBLOCKS; 1244 return error; 1245 } 1246 /* 1247 * As the drive liked it, if we are setting a new default, 1248 * set it into the structures as such. 1249 * 1250 * The means for deciding this are not finalised yet 1251 */ 1252 if (STMODE(dev) == 0x03) { 1253 /* special mode */ 1254 /* XXX */ 1255 switch ((short) (mt->mt_op)) { 1256 case MTSETBSIZ: 1257 st->modes[dsty].blksize = st->blksize; 1258 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1259 break; 1260 case MTSETDNSTY: 1261 st->modes[dsty].density = st->density; 1262 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1263 break; 1264 } 1265 } 1266 return 0; 1267} 1268 1269/* 1270 * Do a synchronous read. 1271 */ 1272int 1273st_read(st, buf, size, flags) 1274 struct st_softc *st; 1275 int size; 1276 int flags; 1277 char *buf; 1278{ 1279 struct scsi_rw_tape cmd; 1280 1281 /* 1282 * If it's a null transfer, return immediatly 1283 */ 1284 if (size == 0) 1285 return 0; 1286 bzero(&cmd, sizeof(cmd)); 1287 cmd.opcode = READ; 1288 if (st->flags & ST_FIXEDBLOCKS) { 1289 cmd.byte2 |= SRW_FIXED; 1290 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1291 cmd.len); 1292 } else 1293 _lto3b(size, cmd.len); 1294 return scsi_scsi_cmd(st->sc_link, (struct scsi_generic *) &cmd, 1295 sizeof(cmd), (u_char *) buf, size, 0, 100000, NULL, 1296 flags | SCSI_DATA_IN); 1297} 1298 1299/* 1300 * Ask the drive what it's min and max blk sizes are. 1301 */ 1302int 1303st_read_block_limits(st, flags) 1304 struct st_softc *st; 1305 int flags; 1306{ 1307 struct scsi_block_limits cmd; 1308 struct scsi_block_limits_data block_limits; 1309 struct scsi_link *sc_link = st->sc_link; 1310 int error; 1311 1312 /* 1313 * First check if we have it all loaded 1314 */ 1315 if ((sc_link->flags & SDEV_MEDIA_LOADED)) 1316 return 0; 1317 1318 /* 1319 * do a 'Read Block Limits' 1320 */ 1321 bzero(&cmd, sizeof(cmd)); 1322 cmd.opcode = READ_BLOCK_LIMITS; 1323 1324 /* 1325 * do the command, update the global values 1326 */ 1327 error = scsi_scsi_cmd(sc_link, (struct scsi_generic *) &cmd, 1328 sizeof(cmd), (u_char *) &block_limits, 1329 sizeof(block_limits), ST_RETRIES, 5000, 1330 NULL, flags | SCSI_DATA_IN); 1331 if (error) 1332 return error; 1333 1334 st->blkmin = _2btol(block_limits.min_length); 1335 st->blkmax = _3btol(block_limits.max_length); 1336 1337 SC_DEBUG(sc_link, SDEV_DB3, 1338 ("(%d <= blksize <= %d)\n", st->blkmin, st->blkmax)); 1339 return 0; 1340} 1341 1342/* 1343 * Get the scsi driver to send a full inquiry to the 1344 * device and use the results to fill out the global 1345 * parameter structure. 1346 * 1347 * called from: 1348 * attach 1349 * open 1350 * ioctl (to reset original blksize) 1351 */ 1352int 1353st_mode_sense(st, flags) 1354 struct st_softc *st; 1355 int flags; 1356{ 1357 u_int scsi_sense_len; 1358 int error; 1359 struct scsi_mode_sense cmd; 1360 struct scsi_sense { 1361 struct scsi_mode_header header; 1362 struct scsi_blk_desc blk_desc; 1363 u_char sense_data[MAX_PAGE_0_SIZE]; 1364 } scsi_sense; 1365 struct scsi_link *sc_link = st->sc_link; 1366 1367 scsi_sense_len = 12 + st->page_0_size; 1368 1369 /* 1370 * Set up a mode sense 1371 */ 1372 bzero(&cmd, sizeof(cmd)); 1373 cmd.opcode = MODE_SENSE; 1374 cmd.length = scsi_sense_len; 1375 1376 /* 1377 * do the command, but we don't need the results 1378 * just print them for our interest's sake, if asked, 1379 * or if we need it as a template for the mode select 1380 * store it away. 1381 */ 1382 error = scsi_scsi_cmd(sc_link, (struct scsi_generic *) &cmd, 1383 sizeof(cmd), (u_char *) &scsi_sense, 1384 scsi_sense_len, ST_RETRIES, 5000, NULL, 1385 flags | SCSI_DATA_IN); 1386 if (error) 1387 return error; 1388 1389 st->numblks = _3btol(scsi_sense.blk_desc.nblocks); 1390 st->media_blksize = _3btol(scsi_sense.blk_desc.blklen); 1391 st->media_density = scsi_sense.blk_desc.density; 1392 if (scsi_sense.header.dev_spec & SMH_DSP_WRITE_PROT) 1393 st->flags |= ST_READONLY; 1394 SC_DEBUG(sc_link, SDEV_DB3, 1395 ("density code 0x%x, %d-byte blocks, write-%s, ", 1396 st->media_density, st->media_blksize, 1397 st->flags & ST_READONLY ? "protected" : "enabled")); 1398 SC_DEBUG(sc_link, SDEV_DB3, 1399 ("%sbuffered\n", 1400 scsi_sense.header.dev_spec & SMH_DSP_BUFF_MODE ? "" : "un")); 1401 if (st->page_0_size) 1402 bcopy(scsi_sense.sense_data, st->sense_data, st->page_0_size); 1403 sc_link->flags |= SDEV_MEDIA_LOADED; 1404 return 0; 1405} 1406 1407/* 1408 * Send a filled out parameter structure to the drive to 1409 * set it into the desire modes etc. 1410 */ 1411int 1412st_mode_select(st, flags) 1413 struct st_softc *st; 1414 int flags; 1415{ 1416 u_int scsi_select_len; 1417 struct scsi_mode_select cmd; 1418 struct scsi_select { 1419 struct scsi_mode_header header; 1420 struct scsi_blk_desc blk_desc; 1421 u_char sense_data[MAX_PAGE_0_SIZE]; 1422 } scsi_select; 1423 struct scsi_link *sc_link = st->sc_link; 1424 1425 scsi_select_len = 12 + st->page_0_size; 1426 1427 /* 1428 * This quirk deals with drives that have only one valid mode 1429 * and think this gives them license to reject all mode selects, 1430 * even if the selected mode is the one that is supported. 1431 */ 1432 if (st->quirks & ST_Q_UNIMODAL) { 1433 SC_DEBUG(sc_link, SDEV_DB3, 1434 ("not setting density 0x%x blksize 0x%x\n", 1435 st->density, st->blksize)); 1436 return 0; 1437 } 1438 1439 /* 1440 * Set up for a mode select 1441 */ 1442 bzero(&cmd, sizeof(cmd)); 1443 cmd.opcode = MODE_SELECT; 1444 cmd.length = scsi_select_len; 1445 1446 bzero(&scsi_select, scsi_select_len); 1447 scsi_select.header.blk_desc_len = sizeof(struct scsi_blk_desc); 1448 scsi_select.header.dev_spec &= ~SMH_DSP_BUFF_MODE; 1449 scsi_select.blk_desc.density = st->density; 1450 if (st->flags & ST_DONTBUFFER) 1451 scsi_select.header.dev_spec |= SMH_DSP_BUFF_MODE_OFF; 1452 else 1453 scsi_select.header.dev_spec |= SMH_DSP_BUFF_MODE_ON; 1454 if (st->flags & ST_FIXEDBLOCKS) 1455 _lto3b(st->blksize, scsi_select.blk_desc.blklen); 1456 if (st->page_0_size) 1457 bcopy(st->sense_data, scsi_select.sense_data, st->page_0_size); 1458 1459 /* 1460 * do the command 1461 */ 1462 return scsi_scsi_cmd(sc_link, (struct scsi_generic *) &cmd, 1463 sizeof(cmd), (u_char *) &scsi_select, scsi_select_len, 1464 ST_RETRIES, 5000, NULL, flags | SCSI_DATA_OUT); 1465} 1466 1467/* 1468 * issue an erase command 1469 */ 1470int 1471st_erase(st, full, flags) 1472 struct st_softc *st; 1473 int full, flags; 1474{ 1475 struct scsi_erase cmd; 1476 1477 /* 1478 * Full erase means set LONG bit in erase command, which asks 1479 * the drive to erase the entire unit. Without this bit, we're 1480 * asking the drive to write an erase gap. 1481 */ 1482 bzero(&cmd, sizeof(cmd)); 1483 cmd.opcode = ERASE; 1484 if (full) 1485 cmd.byte2 = SE_IMMED|SE_LONG; 1486 else 1487 cmd.byte2 = SE_IMMED; 1488 1489 /* 1490 * XXX We always do this asynchronously, for now. How long should 1491 * we wait if we want to (eventually) to it synchronously? 1492 */ 1493 return (scsi_scsi_cmd(st->sc_link, (struct scsi_generic *)&cmd, 1494 sizeof(cmd), 0, 0, ST_RETRIES, 5000, NULL, flags)); 1495} 1496 1497/* 1498 * skip N blocks/filemarks/seq filemarks/eom 1499 */ 1500int 1501st_space(st, number, what, flags) 1502 struct st_softc *st; 1503 u_int what; 1504 int flags; 1505 int number; 1506{ 1507 struct scsi_space cmd; 1508 int error; 1509 1510 switch (what) { 1511 case SP_BLKS: 1512 if (st->flags & ST_PER_ACTION) { 1513 if (number > 0) { 1514 st->flags &= ~ST_PER_ACTION; 1515 return EIO; 1516 } else if (number < 0) { 1517 if (st->flags & ST_AT_FILEMARK) { 1518 /* 1519 * Handling of ST_AT_FILEMARK 1520 * in st_space will fill in the 1521 * right file mark count. 1522 */ 1523 error = st_space(st, 0, SP_FILEMARKS, 1524 flags); 1525 if (error) 1526 return error; 1527 } 1528 if (st->flags & ST_BLANK_READ) { 1529 st->flags &= ~ST_BLANK_READ; 1530 return EIO; 1531 } 1532 st->flags &= ~ST_EIO_PENDING; 1533 } 1534 } 1535 break; 1536 case SP_FILEMARKS: 1537 if (st->flags & ST_EIO_PENDING) { 1538 if (number > 0) { 1539 /* pretend we just discovered the error */ 1540 st->flags &= ~ST_EIO_PENDING; 1541 return EIO; 1542 } else if (number < 0) { 1543 /* back away from the error */ 1544 st->flags &= ~ST_EIO_PENDING; 1545 } 1546 } 1547 if (st->flags & ST_AT_FILEMARK) { 1548 st->flags &= ~ST_AT_FILEMARK; 1549 number--; 1550 } 1551 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 1552 /* back away from unwritten tape */ 1553 st->flags &= ~ST_BLANK_READ; 1554 number++; /* XXX dubious */ 1555 } 1556 break; 1557 case SP_EOM: 1558 if (st->flags & ST_EIO_PENDING) { 1559 /* pretend we just discovered the error */ 1560 st->flags &= ~ST_EIO_PENDING; 1561 return EIO; 1562 } 1563 if (st->flags & ST_AT_FILEMARK) 1564 st->flags &= ~ST_AT_FILEMARK; 1565 break; 1566 } 1567 if (number == 0) 1568 return 0; 1569 1570 bzero(&cmd, sizeof(cmd)); 1571 cmd.opcode = SPACE; 1572 cmd.byte2 = what; 1573 _lto3b(number, cmd.number); 1574 1575 return scsi_scsi_cmd(st->sc_link, (struct scsi_generic *) &cmd, 1576 sizeof(cmd), 0, 0, 0, 2000000, NULL, flags); 1577} 1578 1579/* 1580 * write N filemarks 1581 */ 1582int 1583st_write_filemarks(st, number, flags) 1584 struct st_softc *st; 1585 int flags; 1586 int number; 1587{ 1588 struct scsi_write_filemarks cmd; 1589 1590 /* 1591 * It's hard to write a negative number of file marks. 1592 * Don't try. 1593 */ 1594 if (number < 0) 1595 return EINVAL; 1596 switch (number) { 1597 case 0: /* really a command to sync the drive's buffers */ 1598 break; 1599 case 1: 1600 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 1601 st->flags &= ~ST_WRITTEN; 1602 else 1603 st->flags |= ST_FM_WRITTEN; 1604 st->flags &= ~ST_PER_ACTION; 1605 break; 1606 default: 1607 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 1608 } 1609 1610 bzero(&cmd, sizeof(cmd)); 1611 cmd.opcode = WRITE_FILEMARKS; 1612 _lto3b(number, cmd.number); 1613 1614 return scsi_scsi_cmd(st->sc_link, (struct scsi_generic *) &cmd, 1615 sizeof(cmd), 0, 0, 0, 100000, NULL, flags); 1616} 1617 1618/* 1619 * Make sure the right number of file marks is on tape if the 1620 * tape has been written. If the position argument is true, 1621 * leave the tape positioned where it was originally. 1622 * 1623 * nmarks returns the number of marks to skip (or, if position 1624 * true, which were skipped) to get back original position. 1625 */ 1626int 1627st_check_eod(st, position, nmarks, flags) 1628 struct st_softc *st; 1629 boolean position; 1630 int *nmarks; 1631 int flags; 1632{ 1633 int error; 1634 1635 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 1636 default: 1637 *nmarks = 0; 1638 return 0; 1639 case ST_WRITTEN: 1640 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 1641 *nmarks = 1; 1642 break; 1643 case ST_WRITTEN | ST_2FM_AT_EOD: 1644 *nmarks = 2; 1645 } 1646 error = st_write_filemarks(st, *nmarks, flags); 1647 if (position && !error) 1648 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 1649 return error; 1650} 1651 1652/* 1653 * load/unload/retension 1654 */ 1655int 1656st_load(st, type, flags) 1657 struct st_softc *st; 1658 u_int type; 1659 int flags; 1660{ 1661 struct scsi_load cmd; 1662 1663 if (type != LD_LOAD) { 1664 int error; 1665 int nmarks; 1666 1667 error = st_check_eod(st, FALSE, &nmarks, flags); 1668 if (error) 1669 return error; 1670 } 1671 if (st->quirks & ST_Q_IGNORE_LOADS) 1672 return 0; 1673 1674 bzero(&cmd, sizeof(cmd)); 1675 cmd.opcode = LOAD; 1676 cmd.how = type; 1677 1678 return scsi_scsi_cmd(st->sc_link, (struct scsi_generic *) &cmd, 1679 sizeof(cmd), 0, 0, ST_RETRIES, 300000, NULL, flags); 1680} 1681 1682/* 1683 * Rewind the device 1684 */ 1685int 1686st_rewind(st, immediate, flags) 1687 struct st_softc *st; 1688 u_int immediate; 1689 int flags; 1690{ 1691 struct scsi_rewind cmd; 1692 int error; 1693 int nmarks; 1694 1695 error = st_check_eod(st, FALSE, &nmarks, flags); 1696 if (error) 1697 return error; 1698 st->flags &= ~ST_PER_ACTION; 1699 1700 bzero(&cmd, sizeof(cmd)); 1701 cmd.opcode = REWIND; 1702 cmd.byte2 = immediate; 1703 1704 return scsi_scsi_cmd(st->sc_link, (struct scsi_generic *) &cmd, 1705 sizeof(cmd), 0, 0, ST_RETRIES, immediate ? 5000 : 300000, NULL, 1706 flags); 1707} 1708 1709/* 1710 * Look at the returned sense and act on the error and detirmine 1711 * The unix error number to pass back... (0 = report no error) 1712 * (-1 = continue processing) 1713 */ 1714int 1715st_interpret_sense(xs) 1716 struct scsi_xfer *xs; 1717{ 1718 struct scsi_link *sc_link = xs->sc_link; 1719 struct scsi_sense_data *sense = &xs->sense; 1720 struct buf *bp = xs->bp; 1721 struct st_softc *st = sc_link->device_softc; 1722 u_int8_t key; 1723 int32_t info; 1724 1725 /* 1726 * Get the sense fields and work out what code 1727 */ 1728 if (sense->error_code & SSD_ERRCODE_VALID) 1729 info = _4btol(sense->info); 1730 else 1731 info = xs->datalen; /* bad choice if fixed blocks */ 1732 if ((sense->error_code & SSD_ERRCODE) != 0x70) 1733 return -1; /* let the generic code handle it */ 1734 if (st->flags & ST_FIXEDBLOCKS) { 1735 xs->resid = info * st->blksize; 1736 if (sense->flags & SSD_EOM) { 1737 st->flags |= ST_EIO_PENDING; 1738 if (bp) 1739 bp->b_resid = xs->resid; 1740 } 1741 if (sense->flags & SSD_FILEMARK) { 1742 st->flags |= ST_AT_FILEMARK; 1743 if (bp) 1744 bp->b_resid = xs->resid; 1745 } 1746 if (sense->flags & SSD_ILI) { 1747 st->flags |= ST_EIO_PENDING; 1748 if (bp) 1749 bp->b_resid = xs->resid; 1750 if (sense->error_code & SSD_ERRCODE_VALID && 1751 (xs->flags & SCSI_SILENT) == 0) 1752 printf("%s: block wrong size, %d blocks residual\n", 1753 st->sc_dev.dv_xname, info); 1754 1755 /* 1756 * This quirk code helps the drive read 1757 * the first tape block, regardless of 1758 * format. That is required for these 1759 * drives to return proper MODE SENSE 1760 * information. 1761 */ 1762 if ((st->quirks & ST_Q_SENSE_HELP) && 1763 !(sc_link->flags & SDEV_MEDIA_LOADED)) 1764 st->blksize -= 512; 1765 } 1766 /* 1767 * If no data was tranfered, do it immediatly 1768 */ 1769 if (xs->resid >= xs->datalen) { 1770 if (st->flags & ST_EIO_PENDING) 1771 return EIO; 1772 if (st->flags & ST_AT_FILEMARK) { 1773 if (bp) 1774 bp->b_resid = xs->resid; 1775 return 0; 1776 } 1777 } 1778 } else { /* must be variable mode */ 1779 xs->resid = xs->datalen; /* to be sure */ 1780 if (sense->flags & SSD_EOM) 1781 return EIO; 1782 if (sense->flags & SSD_FILEMARK) { 1783 if (bp) 1784 bp->b_resid = bp->b_bcount; 1785 return 0; 1786 } 1787 if (sense->flags & SSD_ILI) { 1788 if (info < 0) { 1789 /* 1790 * the record was bigger than the read 1791 */ 1792 if ((xs->flags & SCSI_SILENT) == 0) 1793 printf("%s: %d-byte record too big\n", 1794 st->sc_dev.dv_xname, 1795 xs->datalen - info); 1796 return EIO; 1797 } 1798 xs->resid = info; 1799 if (bp) 1800 bp->b_resid = info; 1801 } 1802 } 1803 key = sense->flags & SSD_KEY; 1804 1805 if (key == 0x8) { 1806 /* 1807 * This quirk code helps the drive read the 1808 * first tape block, regardless of format. That 1809 * is required for these drives to return proper 1810 * MODE SENSE information. 1811 */ 1812 if ((st->quirks & ST_Q_SENSE_HELP) && 1813 !(sc_link->flags & SDEV_MEDIA_LOADED)) { 1814 /* still starting */ 1815 st->blksize -= 512; 1816 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 1817 st->flags |= ST_BLANK_READ; 1818 xs->resid = xs->datalen; 1819 if (bp) { 1820 bp->b_resid = xs->resid; 1821 /* return an EOF */ 1822 } 1823 return 0; 1824 } 1825 } 1826 return -1; /* let the default/generic handler handle it */ 1827} 1828 1829/* 1830 * The quirk here is that the drive returns some value to st_mode_sense 1831 * incorrectly until the tape has actually passed by the head. 1832 * 1833 * The method is to set the drive to large fixed-block state (user-specified 1834 * density and 1024-byte blocks), then read and rewind to get it to sense the 1835 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 1836 * work, as a last resort, try variable- length blocks. The result will be 1837 * the ability to do an accurate st_mode_sense. 1838 * 1839 * We know we can do a rewind because we just did a load, which implies rewind. 1840 * Rewind seems preferable to space backward if we have a virgin tape. 1841 * 1842 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 1843 * error processing, both part of st_interpret_sense. 1844 */ 1845int 1846st_touch_tape(st) 1847 struct st_softc *st; 1848{ 1849 char *buf; 1850 int readsize; 1851 int error; 1852 1853 buf = malloc(1024, M_TEMP, M_NOWAIT); 1854 if (!buf) 1855 return ENOMEM; 1856 1857 if ((error = st_mode_sense(st, 0)) != 0) 1858 goto bad; 1859 st->blksize = 1024; 1860 do { 1861 switch (st->blksize) { 1862 case 512: 1863 case 1024: 1864 readsize = st->blksize; 1865 st->flags |= ST_FIXEDBLOCKS; 1866 break; 1867 default: 1868 readsize = 1; 1869 st->flags &= ~ST_FIXEDBLOCKS; 1870 } 1871 if ((error = st_mode_select(st, 0)) != 0) 1872 goto bad; 1873 st_read(st, buf, readsize, SCSI_SILENT); /* XXX */ 1874 if ((error = st_rewind(st, 0, 0)) != 0) { 1875bad: free(buf, M_TEMP); 1876 return error; 1877 } 1878 } while (readsize != 1 && readsize > st->blksize); 1879 1880 free(buf, M_TEMP); 1881 return 0; 1882} 1883 1884int 1885stdump(dev, blkno, va, size) 1886 dev_t dev; 1887 daddr_t blkno; 1888 caddr_t va; 1889 size_t size; 1890{ 1891 1892 /* Not implemented. */ 1893 return ENXIO; 1894} 1895