st.c revision 1.103
1 /* $NetBSD: st.c,v 1.103 1998/09/02 02:18:48 mjacob Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Charles M. Hannum. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Originally written by Julian Elischer (julian (at) tfs.com) 41 * for TRW Financial Systems for use under the MACH(2.5) operating system. 42 * 43 * TRW Financial Systems, in accordance with their agreement with Carnegie 44 * Mellon University, makes this software available to CMU to distribute 45 * or use in any manner that they see fit as long as this message is kept with 46 * the software. For this reason TFS also grants any other persons or 47 * organisations permission to use or modify this software. 48 * 49 * TFS supplies this software to be publicly redistributed 50 * on the understanding that TFS is not responsible for the correct 51 * functioning of this software in any circumstances. 52 * 53 * Ported to run under 386BSD by Julian Elischer (julian (at) tfs.com) Sept 1992 54 * major changes by Julian Elischer (julian (at) jules.dialix.oz.au) May 1993 55 * 56 * A lot of rewhacking done by mjacob (mjacob (at) nas.nasa.gov). 57 */ 58 59 #include "opt_scsi.h" 60 #include "rnd.h" 61 62 #include <sys/types.h> 63 #include <sys/param.h> 64 #include <sys/systm.h> 65 #include <sys/fcntl.h> 66 #include <sys/errno.h> 67 #include <sys/ioctl.h> 68 #include <sys/malloc.h> 69 #include <sys/buf.h> 70 #include <sys/proc.h> 71 #include <sys/user.h> 72 #include <sys/mtio.h> 73 #include <sys/device.h> 74 #include <sys/conf.h> 75 #if NRND > 0 76 #include <sys/rnd.h> 77 #endif 78 79 #include <dev/scsipi/scsipi_all.h> 80 #include <dev/scsipi/scsi_all.h> 81 #include <dev/scsipi/scsi_tape.h> 82 #include <dev/scsipi/scsiconf.h> 83 84 /* Defines for device specific stuff */ 85 #define DEF_FIXED_BSIZE 512 86 #define ST_RETRIES 4 /* only on non IO commands */ 87 88 #define STMODE(z) ( minor(z) & 0x03) 89 #define STDSTY(z) ((minor(z) >> 2) & 0x03) 90 #define STUNIT(z) ((minor(z) >> 4) ) 91 92 #define NORMAL_MODE 0 93 #define NOREW_MODE 1 94 #define EJECT_MODE 2 95 #define CTRL_MODE 3 96 97 #define FALSE 0 98 #define TRUE 1 99 100 #define ST_IO_TIME (3 * 60 * 1000) /* 3 minutes */ 101 #define ST_CTL_TIME (30 * 1000) /* 30 seconds */ 102 #define ST_SPC_TIME (4 * 60 * 60 * 1000) /* 4 hours */ 103 104 /* 105 * Define various devices that we know mis-behave in some way, 106 * and note how they are bad, so we can correct for them 107 */ 108 struct modes { 109 u_int quirks; /* same definitions as in quirkdata */ 110 int blksize; 111 u_int8_t density; 112 }; 113 114 struct quirkdata { 115 u_int quirks; 116 #define ST_Q_FORCE_BLKSIZE 0x0001 117 #define ST_Q_SENSE_HELP 0x0002 /* must do READ for good MODE SENSE */ 118 #define ST_Q_IGNORE_LOADS 0x0004 119 #define ST_Q_BLKSIZE 0x0008 /* variable-block media_blksize > 0 */ 120 #define ST_Q_UNIMODAL 0x0010 /* unimode drive rejects mode select */ 121 u_int page_0_size; 122 #define MAX_PAGE_0_SIZE 64 123 struct modes modes[4]; 124 }; 125 126 struct st_quirk_inquiry_pattern { 127 struct scsipi_inquiry_pattern pattern; 128 struct quirkdata quirkdata; 129 }; 130 131 struct st_quirk_inquiry_pattern st_quirk_patterns[] = { 132 {{T_SEQUENTIAL, T_REMOV, 133 " ", " ", " "}, {0, 0, { 134 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 135 {ST_Q_FORCE_BLKSIZE, 512, QIC_24}, /* minor 4-7 */ 136 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_1600}, /* minor 8-11 */ 137 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_6250} /* minor 12-15 */ 138 }}}, 139 {{T_SEQUENTIAL, T_REMOV, 140 "TANDBERG", " TDC 3600 ", ""}, {0, 12, { 141 {0, 0, 0}, /* minor 0-3 */ 142 {ST_Q_FORCE_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 143 {0, 0, QIC_150}, /* minor 8-11 */ 144 {0, 0, QIC_120} /* minor 12-15 */ 145 }}}, 146 {{T_SEQUENTIAL, T_REMOV, 147 "TANDBERG", " TDC 3800 ", ""}, {0, 0, { 148 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 149 {0, 0, QIC_525}, /* minor 4-7 */ 150 {0, 0, QIC_150}, /* minor 8-11 */ 151 {0, 0, QIC_120} /* minor 12-15 */ 152 }}}, 153 /* 154 * At least -005 and -007 need this. I'll assume they all do unless I 155 * hear otherwise. - mycroft, 31MAR1994 156 */ 157 {{T_SEQUENTIAL, T_REMOV, 158 "ARCHIVE ", "VIPER 2525 25462", ""}, {0, 0, { 159 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 160 {ST_Q_SENSE_HELP, 0, QIC_525}, /* minor 4-7 */ 161 {0, 0, QIC_150}, /* minor 8-11 */ 162 {0, 0, QIC_120} /* minor 12-15 */ 163 }}}, 164 /* 165 * One user reports that this works for his tape drive. It probably 166 * needs more work. - mycroft, 09APR1994 167 */ 168 {{T_SEQUENTIAL, T_REMOV, 169 "SANKYO ", "CP525 ", ""}, {0, 0, { 170 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 171 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 172 {0, 0, QIC_150}, /* minor 8-11 */ 173 {0, 0, QIC_120} /* minor 12-15 */ 174 }}}, 175 {{T_SEQUENTIAL, T_REMOV, 176 "ANRITSU ", "DMT780 ", ""}, {0, 0, { 177 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 178 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 179 {0, 0, QIC_150}, /* minor 8-11 */ 180 {0, 0, QIC_120} /* minor 12-15 */ 181 }}}, 182 {{T_SEQUENTIAL, T_REMOV, 183 "ARCHIVE ", "VIPER 150 21247", ""}, {0, 12, { 184 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 185 {0, 0, QIC_150}, /* minor 4-7 */ 186 {0, 0, QIC_120}, /* minor 8-11 */ 187 {0, 0, QIC_24} /* minor 12-15 */ 188 }}}, 189 {{T_SEQUENTIAL, T_REMOV, 190 "ARCHIVE ", "VIPER 150 21531", ""}, {0, 12, { 191 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 192 {0, 0, QIC_150}, /* minor 4-7 */ 193 {0, 0, QIC_120}, /* minor 8-11 */ 194 {0, 0, QIC_24} /* minor 12-15 */ 195 }}}, 196 {{T_SEQUENTIAL, T_REMOV, 197 "WANGTEK ", "5099ES SCSI", ""}, {0, 0, { 198 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 199 {0, 0, QIC_11}, /* minor 4-7 */ 200 {0, 0, QIC_24}, /* minor 8-11 */ 201 {0, 0, QIC_24} /* minor 12-15 */ 202 }}}, 203 {{T_SEQUENTIAL, T_REMOV, 204 "WANGTEK ", "5150ES SCSI", ""}, {0, 0, { 205 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 206 {0, 0, QIC_24}, /* minor 4-7 */ 207 {0, 0, QIC_120}, /* minor 8-11 */ 208 {0, 0, QIC_150} /* minor 12-15 */ 209 }}}, 210 {{T_SEQUENTIAL, T_REMOV, 211 "WANGTEK ", "5525ES SCSI REV7", ""}, {0, 0, { 212 {0, 0, 0}, /* minor 0-3 */ 213 {ST_Q_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 214 {0, 0, QIC_150}, /* minor 8-11 */ 215 {0, 0, QIC_120} /* minor 12-15 */ 216 }}}, 217 {{T_SEQUENTIAL, T_REMOV, 218 "WangDAT ", "Model 1300 ", ""}, {0, 0, { 219 {0, 0, 0}, /* minor 0-3 */ 220 {ST_Q_FORCE_BLKSIZE, 512, DDS}, /* minor 4-7 */ 221 {ST_Q_FORCE_BLKSIZE, 1024, DDS}, /* minor 8-11 */ 222 {ST_Q_FORCE_BLKSIZE, 0, DDS} /* minor 12-15 */ 223 }}}, 224 {{T_SEQUENTIAL, T_REMOV, 225 "EXABYTE ", "EXB-8200 ", "263H"}, {0, 5, { 226 {0, 0, 0}, /* minor 0-3 */ 227 {0, 0, 0}, /* minor 4-7 */ 228 {0, 0, 0}, /* minor 8-11 */ 229 {0, 0, 0} /* minor 12-15 */ 230 }}}, 231 {{T_SEQUENTIAL, T_REMOV, 232 "STK", "9490", ""}, 233 {ST_Q_FORCE_BLKSIZE|ST_Q_IGNORE_LOADS, 0, { 234 {0, 0, 0}, /* minor 0-3 */ 235 {0, 0, 0}, /* minor 4-7 */ 236 {0, 0, 0}, /* minor 8-11 */ 237 {0, 0, 0} /* minor 12-15 */ 238 }}}, 239 {{T_SEQUENTIAL, T_REMOV, 240 "STK", "SD-3", ""}, 241 {ST_Q_FORCE_BLKSIZE|ST_Q_IGNORE_LOADS, 0, { 242 {0, 0, 0}, /* minor 0-3 */ 243 {0, 0, 0}, /* minor 4-7 */ 244 {0, 0, 0}, /* minor 8-11 */ 245 {0, 0, 0} /* minor 12-15 */ 246 }}}, 247 {{T_SEQUENTIAL, T_REMOV, 248 "IBM", "03590", ""}, {ST_Q_IGNORE_LOADS, 0, { 249 {0, 0, 0}, /* minor 0-3 */ 250 {0, 0, 0}, /* minor 4-7 */ 251 {0, 0, 0}, /* minor 8-11 */ 252 {0, 0, 0} /* minor 12-15 */ 253 }}}, 254 {{T_SEQUENTIAL, T_REMOV, 255 "HP ", "T4000s ", ""}, {ST_Q_UNIMODAL, 0, { 256 {0, 0, QIC_3095}, /* minor 0-3 */ 257 {0, 0, QIC_3095}, /* minor 4-7 */ 258 {0, 0, QIC_3095}, /* minor 8-11 */ 259 {0, 0, QIC_3095}, /* minor 12-15 */ 260 }}}, 261 #if 0 262 {{T_SEQUENTIAL, T_REMOV, 263 "EXABYTE ", "EXB-8200 ", ""}, {0, 12, { 264 {0, 0, 0}, /* minor 0-3 */ 265 {0, 0, 0}, /* minor 4-7 */ 266 {0, 0, 0}, /* minor 8-11 */ 267 {0, 0, 0} /* minor 12-15 */ 268 }}}, 269 #endif 270 }; 271 272 #define NOEJECT 0 273 #define EJECT 1 274 275 struct st_softc { 276 struct device sc_dev; 277 /*--------------------present operating parameters, flags etc.---------------*/ 278 int flags; /* see below */ 279 u_int quirks; /* quirks for the open mode */ 280 int blksize; /* blksize we are using */ 281 u_int8_t density; /* present density */ 282 u_int page_0_size; /* size of page 0 data */ 283 u_int last_dsty; /* last density opened */ 284 short mt_resid; /* last (short) resid */ 285 short mt_erreg; /* last error (sense key) seen */ 286 /*--------------------device/scsi parameters---------------------------------*/ 287 struct scsipi_link *sc_link; /* our link to the adpter etc. */ 288 /*--------------------parameters reported by the device ---------------------*/ 289 int blkmin; /* min blk size */ 290 int blkmax; /* max blk size */ 291 struct quirkdata *quirkdata; /* if we have a rogue entry */ 292 /*--------------------parameters reported by the device for this media-------*/ 293 u_long numblks; /* nominal blocks capacity */ 294 int media_blksize; /* 0 if not ST_FIXEDBLOCKS */ 295 u_int8_t media_density; /* this is what it said when asked */ 296 /*--------------------quirks for the whole drive-----------------------------*/ 297 u_int drive_quirks; /* quirks of this drive */ 298 /*--------------------How we should set up when opening each minor device----*/ 299 struct modes modes[4]; /* plus more for each mode */ 300 u_int8_t modeflags[4]; /* flags for the modes */ 301 #define DENSITY_SET_BY_USER 0x01 302 #define DENSITY_SET_BY_QUIRK 0x02 303 #define BLKSIZE_SET_BY_USER 0x04 304 #define BLKSIZE_SET_BY_QUIRK 0x08 305 /*--------------------storage for sense data returned by the drive-----------*/ 306 u_char sense_data[MAX_PAGE_0_SIZE]; /* 307 * additional sense data needed 308 * for mode sense/select. 309 */ 310 struct buf buf_queue; /* the queue of pending IO */ 311 /* operations */ 312 #if NRND > 0 313 rndsource_element_t rnd_source; 314 #endif 315 }; 316 317 318 int stmatch __P((struct device *, struct cfdata *, void *)); 319 void stattach __P((struct device *, struct device *, void *)); 320 void st_identify_drive __P((struct st_softc *, 321 struct scsipi_inquiry_pattern *)); 322 void st_loadquirks __P((struct st_softc *)); 323 int st_mount_tape __P((dev_t, int)); 324 void st_unmount __P((struct st_softc *, boolean)); 325 int st_decide_mode __P((struct st_softc *, boolean)); 326 void ststart __P((void *)); 327 void stdone __P((struct scsipi_xfer *)); 328 int st_read __P((struct st_softc *, char *, int, int)); 329 int st_read_block_limits __P((struct st_softc *, int)); 330 int st_mode_sense __P((struct st_softc *, int)); 331 int st_mode_select __P((struct st_softc *, int)); 332 int st_cmprss __P((struct st_softc *, int)); 333 int st_space __P((struct st_softc *, int, u_int, int)); 334 int st_write_filemarks __P((struct st_softc *, int, int)); 335 int st_check_eod __P((struct st_softc *, boolean, int *, int)); 336 int st_load __P((struct st_softc *, u_int, int)); 337 int st_rewind __P((struct st_softc *, u_int, int)); 338 int st_interpret_sense __P((struct scsipi_xfer *)); 339 int st_touch_tape __P((struct st_softc *)); 340 int st_erase __P((struct st_softc *, int full, int flags)); 341 int st_rdpos __P((struct st_softc *, int, u_int32_t *)); 342 int st_setpos __P((struct st_softc *, int, u_int32_t *)); 343 344 struct cfattach st_ca = { 345 sizeof(struct st_softc), stmatch, stattach 346 }; 347 348 extern struct cfdriver st_cd; 349 350 struct scsipi_device st_switch = { 351 st_interpret_sense, 352 ststart, 353 NULL, 354 stdone 355 }; 356 357 #define ST_INFO_VALID 0x0001 358 #define ST_BLOCK_SET 0x0002 /* block size, mode set by ioctl */ 359 #define ST_WRITTEN 0x0004 /* data has been written, EOD needed */ 360 #define ST_FIXEDBLOCKS 0x0008 361 #define ST_AT_FILEMARK 0x0010 362 #define ST_EIO_PENDING 0x0020 /* error reporting deferred until next op */ 363 #define ST_NEW_MOUNT 0x0040 /* still need to decide mode */ 364 #define ST_READONLY 0x0080 /* st_mode_sense says write protected */ 365 #define ST_FM_WRITTEN 0x0100 /* 366 * EOF file mark written -- used with 367 * ~ST_WRITTEN to indicate that multiple file 368 * marks have been written 369 */ 370 #define ST_BLANK_READ 0x0200 /* BLANK CHECK encountered already */ 371 #define ST_2FM_AT_EOD 0x0400 /* write 2 file marks at EOD */ 372 #define ST_MOUNTED 0x0800 /* Device is presently mounted */ 373 #define ST_DONTBUFFER 0x1000 /* Disable buffering/caching */ 374 #define ST_EARLYWARN 0x2000 /* Do (deferred) EOM for variable mode */ 375 #define ST_EOM_PENDING 0x4000 /* EOM reporting deferred until next op */ 376 377 #define ST_PER_ACTION (ST_AT_FILEMARK | ST_EIO_PENDING | ST_EOM_PENDING | \ 378 ST_BLANK_READ) 379 #define ST_PER_MOUNT (ST_INFO_VALID | ST_BLOCK_SET | ST_WRITTEN | \ 380 ST_FIXEDBLOCKS | ST_READONLY | ST_FM_WRITTEN | \ 381 ST_2FM_AT_EOD | ST_PER_ACTION) 382 383 #if defined(ST_ENABLE_EARLYWARN) 384 #define ST_INIT_FLAGS ST_EARLYWARN 385 #else 386 #define ST_INIT_FLAGS 0 387 #endif 388 389 struct scsipi_inquiry_pattern st_patterns[] = { 390 {T_SEQUENTIAL, T_REMOV, 391 "", "", ""}, 392 }; 393 394 int 395 stmatch(parent, match, aux) 396 struct device *parent; 397 struct cfdata *match; 398 void *aux; 399 { 400 struct scsipibus_attach_args *sa = aux; 401 int priority; 402 403 (void)scsipi_inqmatch(&sa->sa_inqbuf, 404 (caddr_t)st_patterns, sizeof(st_patterns)/sizeof(st_patterns[0]), 405 sizeof(st_patterns[0]), &priority); 406 return (priority); 407 } 408 409 /* 410 * The routine called by the low level scsi routine when it discovers 411 * A device suitable for this driver 412 */ 413 void 414 stattach(parent, self, aux) 415 struct device *parent, *self; 416 void *aux; 417 { 418 struct st_softc *st = (void *)self; 419 struct scsipibus_attach_args *sa = aux; 420 struct scsipi_link *sc_link = sa->sa_sc_link; 421 422 SC_DEBUG(sc_link, SDEV_DB2, ("stattach: ")); 423 424 /* 425 * Store information needed to contact our base driver 426 */ 427 st->sc_link = sc_link; 428 sc_link->device = &st_switch; 429 sc_link->device_softc = st; 430 sc_link->openings = 1; 431 432 /* 433 * Set initial flags 434 */ 435 436 st->flags = ST_INIT_FLAGS; 437 438 /* 439 * Check if the drive is a known criminal and take 440 * Any steps needed to bring it into line 441 */ 442 st_identify_drive(st, &sa->sa_inqbuf); 443 /* 444 * Use the subdriver to request information regarding 445 * the drive. We cannot use interrupts yet, so the 446 * request must specify this. 447 */ 448 printf("\n"); 449 printf("%s: %s", st->sc_dev.dv_xname, st->quirkdata ? "rogue, " : ""); 450 if (scsipi_test_unit_ready(sc_link, 451 SCSI_AUTOCONF | SCSI_SILENT | SCSI_IGNORE_MEDIA_CHANGE) || 452 st_mode_sense(st, 453 SCSI_AUTOCONF | SCSI_SILENT | SCSI_IGNORE_MEDIA_CHANGE)) 454 printf("drive empty\n"); 455 else { 456 printf("density code 0x%x, ", st->media_density); 457 if (st->media_blksize > 0) 458 printf("%d-byte", st->media_blksize); 459 else 460 printf("variable"); 461 printf(" blocks, write-%s\n", 462 (st->flags & ST_READONLY) ? "protected" : "enabled"); 463 } 464 465 /* 466 * Set up the buf queue for this device 467 */ 468 st->buf_queue.b_active = 0; 469 st->buf_queue.b_actf = 0; 470 st->buf_queue.b_actb = &st->buf_queue.b_actf; 471 472 #if NRND > 0 473 rnd_attach_source(&st->rnd_source, st->sc_dev.dv_xname, RND_TYPE_TAPE); 474 #endif 475 } 476 477 /* 478 * Use the inquiry routine in 'scsi_base' to get drive info so we can 479 * Further tailor our behaviour. 480 */ 481 void 482 st_identify_drive(st, inqbuf) 483 struct st_softc *st; 484 struct scsipi_inquiry_pattern *inqbuf; 485 { 486 struct st_quirk_inquiry_pattern *finger; 487 int priority; 488 489 finger = (struct st_quirk_inquiry_pattern *)scsipi_inqmatch(inqbuf, 490 (caddr_t)st_quirk_patterns, 491 sizeof(st_quirk_patterns) / sizeof(st_quirk_patterns[0]), 492 sizeof(st_quirk_patterns[0]), &priority); 493 if (priority != 0) { 494 st->quirkdata = &finger->quirkdata; 495 st->drive_quirks = finger->quirkdata.quirks; 496 st->quirks = finger->quirkdata.quirks; /* start value */ 497 st->page_0_size = finger->quirkdata.page_0_size; 498 st_loadquirks(st); 499 } 500 } 501 502 /* 503 * initialise the subdevices to the default (QUIRK) state. 504 * this will remove any setting made by the system operator or previous 505 * operations. 506 */ 507 void 508 st_loadquirks(st) 509 struct st_softc *st; 510 { 511 int i; 512 struct modes *mode; 513 struct modes *mode2; 514 515 mode = st->quirkdata->modes; 516 mode2 = st->modes; 517 for (i = 0; i < 4; i++) { 518 bzero(mode2, sizeof(struct modes)); 519 st->modeflags[i] &= ~(BLKSIZE_SET_BY_QUIRK | 520 DENSITY_SET_BY_QUIRK | BLKSIZE_SET_BY_USER | 521 DENSITY_SET_BY_USER); 522 if ((mode->quirks | st->drive_quirks) & ST_Q_FORCE_BLKSIZE) { 523 mode2->blksize = mode->blksize; 524 st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; 525 } 526 if (mode->density) { 527 mode2->density = mode->density; 528 st->modeflags[i] |= DENSITY_SET_BY_QUIRK; 529 } 530 mode++; 531 mode2++; 532 } 533 } 534 535 /* 536 * open the device. 537 */ 538 int 539 stopen(dev, flags, mode, p) 540 dev_t dev; 541 int flags; 542 int mode; 543 struct proc *p; 544 { 545 int unit; 546 u_int stmode, dsty; 547 int error = 0; 548 struct st_softc *st; 549 struct scsipi_link *sc_link; 550 551 unit = STUNIT(dev); 552 if (unit >= st_cd.cd_ndevs) 553 return (ENXIO); 554 st = st_cd.cd_devs[unit]; 555 if (st == NULL) 556 return (ENXIO); 557 558 stmode = STMODE(dev); 559 dsty = STDSTY(dev); 560 sc_link = st->sc_link; 561 562 SC_DEBUG(sc_link, SDEV_DB1, ("open: dev=0x%x (unit %d (of %d))\n", dev, 563 unit, st_cd.cd_ndevs)); 564 565 566 /* 567 * Only allow one at a time 568 */ 569 if (sc_link->flags & SDEV_OPEN) { 570 printf("%s: already open\n", st->sc_dev.dv_xname); 571 return (EBUSY); 572 } 573 574 /* 575 * clear any latched errors. 576 */ 577 st->mt_resid = 0; 578 st->mt_erreg = 0; 579 580 /* 581 * Catch any unit attention errors. 582 */ 583 error = scsipi_test_unit_ready(sc_link, SCSI_IGNORE_MEDIA_CHANGE | 584 (stmode == CTRL_MODE ? SCSI_SILENT : 0)); 585 if (error && stmode != CTRL_MODE) { 586 goto bad; 587 } 588 sc_link->flags |= SDEV_OPEN; /* unit attn are now errors */ 589 590 /* 591 * If the mode is 3 (e.g. minor = 3,7,11,15) then the device has 592 * been opened to set defaults and perform other, usually non-I/O 593 * related, operations. In this case, do a quick check to see 594 * whether the unit actually had a tape loaded (this will be known 595 * as to whether or not we got a NOT READY for the above 596 * unit attention). If a tape is there, go do a mount sequence. 597 */ 598 if (stmode == CTRL_MODE && st->mt_erreg == SKEY_NOT_READY) { 599 return (0); 600 } 601 602 /* 603 * If it's a different mode, or if the media has been 604 * invalidated, unmount the tape from the previous 605 * session but continue with open processing 606 */ 607 if (st->last_dsty != dsty || !(sc_link->flags & SDEV_MEDIA_LOADED)) 608 st_unmount(st, NOEJECT); 609 610 /* 611 * If we are not mounted, then we should start a new 612 * mount session. 613 */ 614 if (!(st->flags & ST_MOUNTED)) { 615 st_mount_tape(dev, flags); 616 st->last_dsty = dsty; 617 } 618 619 SC_DEBUG(sc_link, SDEV_DB2, ("open complete\n")); 620 return (0); 621 622 bad: 623 st_unmount(st, NOEJECT); 624 sc_link->flags &= ~SDEV_OPEN; 625 return (error); 626 } 627 628 /* 629 * close the device.. only called if we are the LAST 630 * occurence of an open device 631 */ 632 int 633 stclose(dev, flags, mode, p) 634 dev_t dev; 635 int flags; 636 int mode; 637 struct proc *p; 638 { 639 int stxx, error = 0; 640 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 641 642 SC_DEBUG(st->sc_link, SDEV_DB1, ("closing\n")); 643 644 /* 645 * Make sure that a tape opened in write-only mode will have 646 * file marks written on it when closed, even if not written to. 647 * 648 * This is for SUN compatibility. Actually, the Sun way of 649 * things is to: 650 * 651 * only write filemarks if there are fmks to be written and 652 * - open for write (possibly read/write) 653 * - the last operation was a write 654 * or: 655 * - opened for wronly 656 * - no data was written (including filemarks) 657 */ 658 659 stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); 660 if (((flags & FWRITE) && stxx == ST_WRITTEN) || 661 ((flags & O_ACCMODE) == FWRITE && stxx == 0)) { 662 int nm; 663 error = st_check_eod(st, FALSE, &nm, 0); 664 } 665 666 switch (STMODE(dev)) { 667 case NORMAL_MODE: 668 st_unmount(st, NOEJECT); 669 break; 670 case NOREW_MODE: 671 case CTRL_MODE: 672 /* 673 * Leave mounted unless media seems to have been removed. 674 * 675 * Otherwise, if we're to terminate a tape with more than one 676 * filemark [ and because we're not rewinding here ], backspace 677 * one filemark so that later appends will see an unbroken 678 * sequence of: 679 * 680 * file - FMK - file - FMK ... file - FMK FMK (EOM) 681 */ 682 if (!(st->sc_link->flags & SDEV_MEDIA_LOADED)) { 683 st_unmount(st, NOEJECT); 684 } else if (error == 0) { 685 /* 686 * ST_WRITTEN was preserved from above. 687 * 688 * All we need to know here is: 689 * 690 * Were we writing this tape and was the last 691 * operation a write? 692 * 693 * Are there supposed to be 2FM at EOD? 694 * 695 * If both statements are true, then we backspace 696 * one filemark. 697 */ 698 stxx |= (st->flags & ST_2FM_AT_EOD); 699 if ((flags & FWRITE) != 0 && 700 (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { 701 error = st_space(st, -1, SP_FILEMARKS, 0); 702 } 703 } 704 break; 705 case EJECT_MODE: 706 st_unmount(st, EJECT); 707 break; 708 } 709 st->sc_link->flags &= ~SDEV_OPEN; 710 711 return (error); 712 } 713 714 /* 715 * Start a new mount session. 716 * Copy in all the default parameters from the selected device mode. 717 * and try guess any that seem to be defaulted. 718 */ 719 int 720 st_mount_tape(dev, flags) 721 dev_t dev; 722 int flags; 723 { 724 int unit; 725 u_int dsty; 726 struct st_softc *st; 727 struct scsipi_link *sc_link; 728 int error = 0; 729 730 unit = STUNIT(dev); 731 dsty = STDSTY(dev); 732 st = st_cd.cd_devs[unit]; 733 sc_link = st->sc_link; 734 735 if (st->flags & ST_MOUNTED) 736 return (0); 737 738 SC_DEBUG(sc_link, SDEV_DB1, ("mounting\n ")); 739 st->flags |= ST_NEW_MOUNT; 740 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 741 /* 742 * If the media is new, then make sure we give it a chance to 743 * to do a 'load' instruction. (We assume it is new.) 744 */ 745 if ((error = st_load(st, LD_LOAD, 0)) != 0) 746 return (error); 747 /* 748 * Throw another dummy instruction to catch 749 * 'Unit attention' errors. Many drives give 750 * these after doing a Load instruction (with 751 * the MEDIUM MAY HAVE CHANGED asc/ascq). 752 */ 753 scsipi_test_unit_ready(sc_link, SCSI_SILENT); /* XXX */ 754 755 /* 756 * Some devices can't tell you much until they have been 757 * asked to look at the media. This quirk does this. 758 */ 759 if (st->quirks & ST_Q_SENSE_HELP) 760 if ((error = st_touch_tape(st)) != 0) 761 return (error); 762 /* 763 * Load the physical device parameters 764 * loads: blkmin, blkmax 765 */ 766 if ((error = st_read_block_limits(st, 0)) != 0) 767 return (error); 768 /* 769 * Load the media dependent parameters 770 * includes: media_blksize,media_density,numblks 771 * As we have a tape in, it should be reflected here. 772 * If not you may need the "quirk" above. 773 */ 774 if ((error = st_mode_sense(st, 0)) != 0) 775 return (error); 776 /* 777 * If we have gained a permanent density from somewhere, 778 * then use it in preference to the one supplied by 779 * default by the driver. 780 */ 781 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 782 st->density = st->modes[dsty].density; 783 else 784 st->density = st->media_density; 785 /* 786 * If we have gained a permanent blocksize 787 * then use it in preference to the one supplied by 788 * default by the driver. 789 */ 790 st->flags &= ~ST_FIXEDBLOCKS; 791 if (st->modeflags[dsty] & 792 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 793 st->blksize = st->modes[dsty].blksize; 794 if (st->blksize) 795 st->flags |= ST_FIXEDBLOCKS; 796 } else { 797 if ((error = st_decide_mode(st, FALSE)) != 0) 798 return (error); 799 } 800 if ((error = st_mode_select(st, 0)) != 0) { 801 printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); 802 return (error); 803 } 804 scsipi_prevent(sc_link, PR_PREVENT, 805 SCSI_IGNORE_ILLEGAL_REQUEST | SCSI_IGNORE_NOT_READY); 806 st->flags &= ~ST_NEW_MOUNT; 807 st->flags |= ST_MOUNTED; 808 sc_link->flags |= SDEV_MEDIA_LOADED; /* move earlier? */ 809 810 return (0); 811 } 812 813 /* 814 * End the present mount session. 815 * Rewind, and optionally eject the tape. 816 * Reset various flags to indicate that all new 817 * operations require another mount operation 818 */ 819 void 820 st_unmount(st, eject) 821 struct st_softc *st; 822 boolean eject; 823 { 824 struct scsipi_link *sc_link = st->sc_link; 825 int nmarks; 826 827 if (!(st->flags & ST_MOUNTED)) 828 return; 829 SC_DEBUG(sc_link, SDEV_DB1, ("unmounting\n")); 830 st_check_eod(st, FALSE, &nmarks, SCSI_IGNORE_NOT_READY); 831 st_rewind(st, 0, SCSI_IGNORE_NOT_READY); 832 scsipi_prevent(sc_link, PR_ALLOW, 833 SCSI_IGNORE_ILLEGAL_REQUEST | SCSI_IGNORE_NOT_READY); 834 if (eject) 835 st_load(st, LD_UNLOAD, SCSI_IGNORE_NOT_READY); 836 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 837 sc_link->flags &= ~SDEV_MEDIA_LOADED; 838 } 839 840 /* 841 * Given all we know about the device, media, mode, 'quirks' and 842 * initial operation, make a decision as to how we should be set 843 * to run (regarding blocking and EOD marks) 844 */ 845 int 846 st_decide_mode(st, first_read) 847 struct st_softc *st; 848 boolean first_read; 849 { 850 #ifdef SCSIDEBUG 851 struct scsipi_link *sc_link = st->sc_link; 852 #endif 853 854 SC_DEBUG(sc_link, SDEV_DB2, ("starting block mode decision\n")); 855 856 /* 857 * If the drive can only handle fixed-length blocks and only at 858 * one size, perhaps we should just do that. 859 */ 860 if (st->blkmin && (st->blkmin == st->blkmax)) { 861 st->flags |= ST_FIXEDBLOCKS; 862 st->blksize = st->blkmin; 863 SC_DEBUG(sc_link, SDEV_DB3, 864 ("blkmin == blkmax of %d\n", st->blkmin)); 865 goto done; 866 } 867 /* 868 * If the tape density mandates (or even suggests) use of fixed 869 * or variable-length blocks, comply. 870 */ 871 switch (st->density) { 872 case HALFINCH_800: 873 case HALFINCH_1600: 874 case HALFINCH_6250: 875 case DDS: 876 st->flags &= ~ST_FIXEDBLOCKS; 877 st->blksize = 0; 878 SC_DEBUG(sc_link, SDEV_DB3, ("density specified variable\n")); 879 goto done; 880 case QIC_11: 881 case QIC_24: 882 case QIC_120: 883 case QIC_150: 884 case QIC_525: 885 case QIC_1320: 886 st->flags |= ST_FIXEDBLOCKS; 887 if (st->media_blksize > 0) 888 st->blksize = st->media_blksize; 889 else 890 st->blksize = DEF_FIXED_BSIZE; 891 SC_DEBUG(sc_link, SDEV_DB3, ("density specified fixed\n")); 892 goto done; 893 } 894 /* 895 * If we're about to read the tape, perhaps we should choose 896 * fixed or variable-length blocks and block size according to 897 * what the drive found on the tape. 898 */ 899 if (first_read && 900 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 901 (st->media_blksize == DEF_FIXED_BSIZE) || 902 (st->media_blksize == 1024))) { 903 if (st->media_blksize > 0) 904 st->flags |= ST_FIXEDBLOCKS; 905 else 906 st->flags &= ~ST_FIXEDBLOCKS; 907 st->blksize = st->media_blksize; 908 SC_DEBUG(sc_link, SDEV_DB3, 909 ("Used media_blksize of %d\n", st->media_blksize)); 910 goto done; 911 } 912 /* 913 * We're getting no hints from any direction. Choose variable- 914 * length blocks arbitrarily. 915 */ 916 st->flags &= ~ST_FIXEDBLOCKS; 917 st->blksize = 0; 918 SC_DEBUG(sc_link, SDEV_DB3, 919 ("Give up and default to variable mode\n")); 920 921 done: 922 /* 923 * Decide whether or not to write two file marks to signify end- 924 * of-data. Make the decision as a function of density. If 925 * the decision is not to use a second file mark, the SCSI BLANK 926 * CHECK condition code will be recognized as end-of-data when 927 * first read. 928 * (I think this should be a by-product of fixed/variable..julian) 929 */ 930 switch (st->density) { 931 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 932 case QIC_11: 933 case QIC_24: 934 case QIC_120: 935 case QIC_150: 936 case QIC_525: 937 case QIC_1320: 938 st->flags &= ~ST_2FM_AT_EOD; 939 break; 940 default: 941 st->flags |= ST_2FM_AT_EOD; 942 } 943 return (0); 944 } 945 946 /* 947 * Actually translate the requested transfer into 948 * one the physical driver can understand 949 * The transfer is described by a buf and will include 950 * only one physical transfer. 951 */ 952 void 953 ststrategy(bp) 954 struct buf *bp; 955 { 956 struct st_softc *st = st_cd.cd_devs[STUNIT(bp->b_dev)]; 957 struct buf *dp; 958 int s; 959 960 SC_DEBUG(st->sc_link, SDEV_DB1, 961 ("ststrategy %ld bytes @ blk %d\n", bp->b_bcount, bp->b_blkno)); 962 /* 963 * If it's a null transfer, return immediatly 964 */ 965 if (bp->b_bcount == 0) 966 goto done; 967 /* 968 * Odd sized request on fixed drives are verboten 969 */ 970 if (st->flags & ST_FIXEDBLOCKS) { 971 if (bp->b_bcount % st->blksize) { 972 printf("%s: bad request, must be multiple of %d\n", 973 st->sc_dev.dv_xname, st->blksize); 974 bp->b_error = EIO; 975 goto bad; 976 } 977 } 978 /* 979 * as are out-of-range requests on variable drives. 980 */ 981 else if (bp->b_bcount < st->blkmin || 982 (st->blkmax && bp->b_bcount > st->blkmax)) { 983 printf("%s: bad request, must be between %d and %d\n", 984 st->sc_dev.dv_xname, st->blkmin, st->blkmax); 985 bp->b_error = EIO; 986 goto bad; 987 } 988 s = splbio(); 989 990 /* 991 * Place it in the queue of activities for this tape 992 * at the end (a bit silly because we only have on user.. 993 * (but it could fork())) 994 */ 995 dp = &st->buf_queue; 996 bp->b_actf = NULL; 997 bp->b_actb = dp->b_actb; 998 *dp->b_actb = bp; 999 dp->b_actb = &bp->b_actf; 1000 1001 /* 1002 * Tell the device to get going on the transfer if it's 1003 * not doing anything, otherwise just wait for completion 1004 * (All a bit silly if we're only allowing 1 open but..) 1005 */ 1006 ststart(st); 1007 1008 splx(s); 1009 return; 1010 bad: 1011 bp->b_flags |= B_ERROR; 1012 done: 1013 /* 1014 * Correctly set the buf to indicate a completed xfer 1015 */ 1016 bp->b_resid = bp->b_bcount; 1017 biodone(bp); 1018 return; 1019 } 1020 1021 /* 1022 * ststart looks to see if there is a buf waiting for the device 1023 * and that the device is not already busy. If both are true, 1024 * It dequeues the buf and creates a scsi command to perform the 1025 * transfer required. The transfer request will call scsipi_done 1026 * on completion, which will in turn call this routine again 1027 * so that the next queued transfer is performed. 1028 * The bufs are queued by the strategy routine (ststrategy) 1029 * 1030 * This routine is also called after other non-queued requests 1031 * have been made of the scsi driver, to ensure that the queue 1032 * continues to be drained. 1033 * ststart() is called at splbio 1034 */ 1035 void 1036 ststart(v) 1037 void *v; 1038 { 1039 struct st_softc *st = v; 1040 struct scsipi_link *sc_link = st->sc_link; 1041 register struct buf *bp, *dp; 1042 struct scsi_rw_tape cmd; 1043 int flags; 1044 1045 SC_DEBUG(sc_link, SDEV_DB2, ("ststart ")); 1046 /* 1047 * See if there is a buf to do and we are not already 1048 * doing one 1049 */ 1050 while (sc_link->openings > 0) { 1051 /* if a special awaits, let it proceed first */ 1052 if (sc_link->flags & SDEV_WAITING) { 1053 sc_link->flags &= ~SDEV_WAITING; 1054 wakeup((caddr_t)sc_link); 1055 return; 1056 } 1057 1058 dp = &st->buf_queue; 1059 if ((bp = dp->b_actf) == NULL) 1060 return; 1061 if ((dp = bp->b_actf) != NULL) 1062 dp->b_actb = bp->b_actb; 1063 else 1064 st->buf_queue.b_actb = bp->b_actb; 1065 *bp->b_actb = dp; 1066 1067 /* 1068 * if the device has been unmounted byt the user 1069 * then throw away all requests until done 1070 */ 1071 if (!(st->flags & ST_MOUNTED) || 1072 !(sc_link->flags & SDEV_MEDIA_LOADED)) { 1073 /* make sure that one implies the other.. */ 1074 sc_link->flags &= ~SDEV_MEDIA_LOADED; 1075 bp->b_flags |= B_ERROR; 1076 bp->b_error = EIO; 1077 bp->b_resid = bp->b_bcount; 1078 biodone(bp); 1079 continue; 1080 } 1081 /* 1082 * only FIXEDBLOCK devices have pending I/O or space operations. 1083 */ 1084 if (st->flags & ST_FIXEDBLOCKS) { 1085 /* 1086 * If we are at a filemark but have not reported it yet 1087 * then we should report it now 1088 */ 1089 if (st->flags & ST_AT_FILEMARK) { 1090 if ((bp->b_flags & B_READ) == B_WRITE) { 1091 /* 1092 * Handling of ST_AT_FILEMARK in 1093 * st_space will fill in the right file 1094 * mark count. 1095 * Back up over filemark 1096 */ 1097 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1098 bp->b_flags |= B_ERROR; 1099 bp->b_error = EIO; 1100 biodone(bp); 1101 continue; 1102 } 1103 } else { 1104 bp->b_resid = bp->b_bcount; 1105 bp->b_error = 0; 1106 bp->b_flags &= ~B_ERROR; 1107 st->flags &= ~ST_AT_FILEMARK; 1108 biodone(bp); 1109 continue; /* seek more work */ 1110 } 1111 } 1112 } 1113 /* 1114 * If we are at EOM but have not reported it 1115 * yet then we should report it now. 1116 */ 1117 if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { 1118 bp->b_resid = bp->b_bcount; 1119 if (st->flags & ST_EIO_PENDING) { 1120 bp->b_error = EIO; 1121 bp->b_flags |= B_ERROR; 1122 } 1123 st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); 1124 biodone(bp); 1125 continue; /* seek more work */ 1126 } 1127 1128 /* 1129 * Fill out the scsi command 1130 */ 1131 bzero(&cmd, sizeof(cmd)); 1132 if ((bp->b_flags & B_READ) == B_WRITE) { 1133 cmd.opcode = WRITE; 1134 st->flags &= ~ST_FM_WRITTEN; 1135 flags = SCSI_DATA_OUT; 1136 } else { 1137 cmd.opcode = READ; 1138 flags = SCSI_DATA_IN; 1139 } 1140 1141 /* 1142 * Handle "fixed-block-mode" tape drives by using the 1143 * block count instead of the length. 1144 */ 1145 if (st->flags & ST_FIXEDBLOCKS) { 1146 cmd.byte2 |= SRW_FIXED; 1147 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1148 } else 1149 _lto3b(bp->b_bcount, cmd.len); 1150 1151 /* 1152 * go ask the adapter to do all this for us 1153 */ 1154 if (scsipi_command(sc_link, 1155 (struct scsipi_generic *)&cmd, sizeof(cmd), 1156 (u_char *)bp->b_data, bp->b_bcount, 1157 0, ST_IO_TIME, bp, flags | SCSI_NOSLEEP)) 1158 printf("%s: not queued\n", st->sc_dev.dv_xname); 1159 } /* go back and see if we can cram more work in.. */ 1160 } 1161 1162 void 1163 stdone(xs) 1164 struct scsipi_xfer *xs; 1165 { 1166 1167 if (xs->bp != NULL) { 1168 struct st_softc *st = xs->sc_link->device_softc; 1169 if ((xs->bp->b_flags & B_READ) == B_WRITE) { 1170 st->flags |= ST_WRITTEN; 1171 } else { 1172 st->flags &= ~ST_WRITTEN; 1173 } 1174 #if NRND > 0 1175 rnd_add_uint32(&st->rnd_source, xs->bp->b_blkno); 1176 #endif 1177 } 1178 } 1179 1180 int 1181 stread(dev, uio, iomode) 1182 dev_t dev; 1183 struct uio *uio; 1184 int iomode; 1185 { 1186 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1187 1188 return (physio(ststrategy, NULL, dev, B_READ, 1189 st->sc_link->adapter->scsipi_minphys, uio)); 1190 } 1191 1192 int 1193 stwrite(dev, uio, iomode) 1194 dev_t dev; 1195 struct uio *uio; 1196 int iomode; 1197 { 1198 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1199 1200 return (physio(ststrategy, NULL, dev, B_WRITE, 1201 st->sc_link->adapter->scsipi_minphys, uio)); 1202 } 1203 1204 /* 1205 * Perform special action on behalf of the user; 1206 * knows about the internals of this device 1207 */ 1208 int 1209 stioctl(dev, cmd, arg, flag, p) 1210 dev_t dev; 1211 u_long cmd; 1212 caddr_t arg; 1213 int flag; 1214 struct proc *p; 1215 { 1216 int error = 0; 1217 int unit; 1218 int number, nmarks, dsty; 1219 int flags; 1220 struct st_softc *st; 1221 int hold_blksize; 1222 u_int8_t hold_density; 1223 struct mtop *mt = (struct mtop *) arg; 1224 1225 /* 1226 * Find the device that the user is talking about 1227 */ 1228 flags = 0; /* give error messages, act on errors etc. */ 1229 unit = STUNIT(dev); 1230 dsty = STDSTY(dev); 1231 st = st_cd.cd_devs[unit]; 1232 hold_blksize = st->blksize; 1233 hold_density = st->density; 1234 1235 switch ((u_int) cmd) { 1236 1237 case MTIOCGET: { 1238 struct mtget *g = (struct mtget *) arg; 1239 /* 1240 * (to get the current state of READONLY) 1241 */ 1242 error = st_mode_sense(st, SCSI_SILENT); 1243 if (error) 1244 break; 1245 SC_DEBUG(st->sc_link, SDEV_DB1, ("[ioctl: get status]\n")); 1246 bzero(g, sizeof(struct mtget)); 1247 g->mt_type = 0x7; /* Ultrix compat *//*? */ 1248 g->mt_blksiz = st->blksize; 1249 g->mt_density = st->density; 1250 g->mt_mblksiz[0] = st->modes[0].blksize; 1251 g->mt_mblksiz[1] = st->modes[1].blksize; 1252 g->mt_mblksiz[2] = st->modes[2].blksize; 1253 g->mt_mblksiz[3] = st->modes[3].blksize; 1254 g->mt_mdensity[0] = st->modes[0].density; 1255 g->mt_mdensity[1] = st->modes[1].density; 1256 g->mt_mdensity[2] = st->modes[2].density; 1257 g->mt_mdensity[3] = st->modes[3].density; 1258 if (st->flags & ST_READONLY) 1259 g->mt_dsreg |= MT_DS_RDONLY; 1260 if (st->flags & ST_MOUNTED) 1261 g->mt_dsreg |= MT_DS_MOUNTED; 1262 g->mt_resid = st->mt_resid; 1263 g->mt_erreg = st->mt_erreg; 1264 /* 1265 * clear latched errors. 1266 */ 1267 st->mt_resid = 0; 1268 st->mt_erreg = 0; 1269 break; 1270 } 1271 case MTIOCTOP: { 1272 1273 SC_DEBUG(st->sc_link, SDEV_DB1, 1274 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1275 mt->mt_count)); 1276 1277 /* compat: in U*x it is a short */ 1278 number = mt->mt_count; 1279 switch ((short) (mt->mt_op)) { 1280 case MTWEOF: /* write an end-of-file record */ 1281 error = st_write_filemarks(st, number, flags); 1282 break; 1283 case MTBSF: /* backward space file */ 1284 number = -number; 1285 case MTFSF: /* forward space file */ 1286 error = st_check_eod(st, FALSE, &nmarks, flags); 1287 if (!error) 1288 error = st_space(st, number - nmarks, 1289 SP_FILEMARKS, flags); 1290 break; 1291 case MTBSR: /* backward space record */ 1292 number = -number; 1293 case MTFSR: /* forward space record */ 1294 error = st_check_eod(st, TRUE, &nmarks, flags); 1295 if (!error) 1296 error = st_space(st, number, SP_BLKS, flags); 1297 break; 1298 case MTREW: /* rewind */ 1299 error = st_rewind(st, 0, flags); 1300 break; 1301 case MTOFFL: /* rewind and put the drive offline */ 1302 st_unmount(st, EJECT); 1303 break; 1304 case MTNOP: /* no operation, sets status only */ 1305 break; 1306 case MTRETEN: /* retension the tape */ 1307 error = st_load(st, LD_RETENSION, flags); 1308 if (!error) 1309 error = st_load(st, LD_LOAD, flags); 1310 break; 1311 case MTEOM: /* forward space to end of media */ 1312 error = st_check_eod(st, FALSE, &nmarks, flags); 1313 if (!error) 1314 error = st_space(st, 1, SP_EOM, flags); 1315 break; 1316 case MTCACHE: /* enable controller cache */ 1317 st->flags &= ~ST_DONTBUFFER; 1318 goto try_new_value; 1319 case MTNOCACHE: /* disable controller cache */ 1320 st->flags |= ST_DONTBUFFER; 1321 goto try_new_value; 1322 case MTERASE: /* erase volume */ 1323 error = st_erase(st, number, flags); 1324 break; 1325 case MTSETBSIZ: /* Set block size for device */ 1326 #ifdef NOTYET 1327 if (!(st->flags & ST_NEW_MOUNT)) { 1328 uprintf("re-mount tape before changing blocksize"); 1329 error = EINVAL; 1330 break; 1331 } 1332 #endif 1333 if (number == 0) 1334 st->flags &= ~ST_FIXEDBLOCKS; 1335 else { 1336 if ((st->blkmin || st->blkmax) && 1337 (number < st->blkmin || 1338 number > st->blkmax)) { 1339 error = EINVAL; 1340 break; 1341 } 1342 st->flags |= ST_FIXEDBLOCKS; 1343 } 1344 st->blksize = number; 1345 st->flags |= ST_BLOCK_SET; /*XXX */ 1346 goto try_new_value; 1347 1348 case MTSETDNSTY: /* Set density for device and mode */ 1349 /* 1350 * Any number >= 0 and <= 0xff is legal. Numbers 1351 * above 0x80 are 'vendor unique'. 1352 */ 1353 if (number < 0 || number > 255) { 1354 error = EINVAL; 1355 break; 1356 } else 1357 st->density = number; 1358 goto try_new_value; 1359 1360 case MTCMPRESS: 1361 error = st_cmprss(st, number); 1362 break; 1363 1364 case MTEWARN: 1365 if (number) 1366 st->flags |= ST_EARLYWARN; 1367 else 1368 st->flags &= ~ST_EARLYWARN; 1369 break; 1370 1371 default: 1372 error = EINVAL; 1373 } 1374 break; 1375 } 1376 case MTIOCIEOT: 1377 case MTIOCEEOT: 1378 break; 1379 1380 case MTIOCRDSPOS: 1381 error = st_rdpos(st, 0, (u_int32_t *) arg); 1382 break; 1383 1384 case MTIOCRDHPOS: 1385 error = st_rdpos(st, 1, (u_int32_t *) arg); 1386 break; 1387 1388 case MTIOCSLOCATE: 1389 error = st_setpos(st, 0, (u_int32_t *) arg); 1390 break; 1391 1392 case MTIOCHLOCATE: 1393 error = st_setpos(st, 1, (u_int32_t *) arg); 1394 break; 1395 1396 1397 default: 1398 error = scsipi_do_ioctl(st->sc_link, dev, cmd, arg, 1399 flag, p); 1400 break; 1401 } 1402 return (error); 1403 /*-----------------------------*/ 1404 try_new_value: 1405 /* 1406 * Check that the mode being asked for is aggreeable to the 1407 * drive. If not, put it back the way it was. 1408 */ 1409 if ((error = st_mode_select(st, 0)) != 0) {/* put it back as it was */ 1410 printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); 1411 st->density = hold_density; 1412 st->blksize = hold_blksize; 1413 if (st->blksize) 1414 st->flags |= ST_FIXEDBLOCKS; 1415 else 1416 st->flags &= ~ST_FIXEDBLOCKS; 1417 return (error); 1418 } 1419 /* 1420 * As the drive liked it, if we are setting a new default, 1421 * set it into the structures as such. 1422 * 1423 * The means for deciding this are not finalised yet- but 1424 * if the device was opened in Control Mode, the values 1425 * are persistent now across mounts. 1426 */ 1427 if (STMODE(dev) == CTRL_MODE) { 1428 switch ((short) (mt->mt_op)) { 1429 case MTSETBSIZ: 1430 st->modes[dsty].blksize = st->blksize; 1431 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1432 break; 1433 case MTSETDNSTY: 1434 st->modes[dsty].density = st->density; 1435 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1436 break; 1437 } 1438 } 1439 return (0); 1440 } 1441 1442 /* 1443 * Do a synchronous read. 1444 */ 1445 int 1446 st_read(st, buf, size, flags) 1447 struct st_softc *st; 1448 int size; 1449 int flags; 1450 char *buf; 1451 { 1452 struct scsi_rw_tape cmd; 1453 1454 /* 1455 * If it's a null transfer, return immediatly 1456 */ 1457 if (size == 0) 1458 return (0); 1459 bzero(&cmd, sizeof(cmd)); 1460 cmd.opcode = READ; 1461 if (st->flags & ST_FIXEDBLOCKS) { 1462 cmd.byte2 |= SRW_FIXED; 1463 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1464 cmd.len); 1465 } else 1466 _lto3b(size, cmd.len); 1467 return (scsipi_command(st->sc_link, 1468 (struct scsipi_generic *)&cmd, sizeof(cmd), 1469 (u_char *)buf, size, 0, ST_IO_TIME, NULL, flags | SCSI_DATA_IN)); 1470 } 1471 1472 /* 1473 * Ask the drive what it's min and max blk sizes are. 1474 */ 1475 int 1476 st_read_block_limits(st, flags) 1477 struct st_softc *st; 1478 int flags; 1479 { 1480 struct scsi_block_limits cmd; 1481 struct scsi_block_limits_data block_limits; 1482 struct scsipi_link *sc_link = st->sc_link; 1483 int error; 1484 1485 /* 1486 * First check if we have it all loaded 1487 */ 1488 if ((sc_link->flags & SDEV_MEDIA_LOADED)) 1489 return (0); 1490 1491 /* 1492 * do a 'Read Block Limits' 1493 */ 1494 bzero(&cmd, sizeof(cmd)); 1495 cmd.opcode = READ_BLOCK_LIMITS; 1496 1497 /* 1498 * do the command, update the global values 1499 */ 1500 error = scsipi_command(sc_link, (struct scsipi_generic *)&cmd, 1501 sizeof(cmd), (u_char *)&block_limits, sizeof(block_limits), 1502 ST_RETRIES, ST_CTL_TIME, NULL, flags | SCSI_DATA_IN); 1503 if (error) 1504 return (error); 1505 1506 st->blkmin = _2btol(block_limits.min_length); 1507 st->blkmax = _3btol(block_limits.max_length); 1508 1509 SC_DEBUG(sc_link, SDEV_DB3, 1510 ("(%d <= blksize <= %d)\n", st->blkmin, st->blkmax)); 1511 return (0); 1512 } 1513 1514 /* 1515 * Get the scsi driver to send a full inquiry to the 1516 * device and use the results to fill out the global 1517 * parameter structure. 1518 * 1519 * called from: 1520 * attach 1521 * open 1522 * ioctl (to reset original blksize) 1523 */ 1524 int 1525 st_mode_sense(st, flags) 1526 struct st_softc *st; 1527 int flags; 1528 { 1529 u_int scsipi_sense_len; 1530 int error; 1531 struct scsi_mode_sense cmd; 1532 struct scsipi_sense { 1533 struct scsi_mode_header header; 1534 struct scsi_blk_desc blk_desc; 1535 u_char sense_data[MAX_PAGE_0_SIZE]; 1536 } scsipi_sense; 1537 struct scsipi_link *sc_link = st->sc_link; 1538 1539 scsipi_sense_len = 12 + st->page_0_size; 1540 1541 /* 1542 * Set up a mode sense 1543 */ 1544 bzero(&cmd, sizeof(cmd)); 1545 cmd.opcode = SCSI_MODE_SENSE; 1546 cmd.length = scsipi_sense_len; 1547 1548 /* 1549 * do the command, but we don't need the results 1550 * just print them for our interest's sake, if asked, 1551 * or if we need it as a template for the mode select 1552 * store it away. 1553 */ 1554 error = scsipi_command(sc_link, (struct scsipi_generic *)&cmd, 1555 sizeof(cmd), (u_char *)&scsipi_sense, scsipi_sense_len, 1556 ST_RETRIES, ST_CTL_TIME, NULL, flags | SCSI_DATA_IN); 1557 if (error) 1558 return (error); 1559 1560 st->numblks = _3btol(scsipi_sense.blk_desc.nblocks); 1561 st->media_blksize = _3btol(scsipi_sense.blk_desc.blklen); 1562 st->media_density = scsipi_sense.blk_desc.density; 1563 if (scsipi_sense.header.dev_spec & SMH_DSP_WRITE_PROT) 1564 st->flags |= ST_READONLY; 1565 else 1566 st->flags &= ~ST_READONLY; 1567 SC_DEBUG(sc_link, SDEV_DB3, 1568 ("density code 0x%x, %d-byte blocks, write-%s, ", 1569 st->media_density, st->media_blksize, 1570 st->flags & ST_READONLY ? "protected" : "enabled")); 1571 SC_DEBUG(sc_link, SDEV_DB3, 1572 ("%sbuffered\n", 1573 scsipi_sense.header.dev_spec & SMH_DSP_BUFF_MODE ? "" : "un")); 1574 if (st->page_0_size) 1575 bcopy(scsipi_sense.sense_data, st->sense_data, 1576 st->page_0_size); 1577 sc_link->flags |= SDEV_MEDIA_LOADED; 1578 return (0); 1579 } 1580 1581 /* 1582 * Send a filled out parameter structure to the drive to 1583 * set it into the desire modes etc. 1584 */ 1585 int 1586 st_mode_select(st, flags) 1587 struct st_softc *st; 1588 int flags; 1589 { 1590 u_int scsi_select_len; 1591 struct scsi_mode_select cmd; 1592 struct scsi_select { 1593 struct scsi_mode_header header; 1594 struct scsi_blk_desc blk_desc; 1595 u_char sense_data[MAX_PAGE_0_SIZE]; 1596 } scsi_select; 1597 struct scsipi_link *sc_link = st->sc_link; 1598 1599 scsi_select_len = 12 + st->page_0_size; 1600 1601 /* 1602 * This quirk deals with drives that have only one valid mode 1603 * and think this gives them license to reject all mode selects, 1604 * even if the selected mode is the one that is supported. 1605 */ 1606 if (st->quirks & ST_Q_UNIMODAL) { 1607 SC_DEBUG(sc_link, SDEV_DB3, 1608 ("not setting density 0x%x blksize 0x%x\n", 1609 st->density, st->blksize)); 1610 return (0); 1611 } 1612 1613 /* 1614 * Set up for a mode select 1615 */ 1616 bzero(&cmd, sizeof(cmd)); 1617 cmd.opcode = SCSI_MODE_SELECT; 1618 cmd.length = scsi_select_len; 1619 1620 bzero(&scsi_select, scsi_select_len); 1621 scsi_select.header.blk_desc_len = sizeof(struct scsi_blk_desc); 1622 scsi_select.header.dev_spec &= ~SMH_DSP_BUFF_MODE; 1623 scsi_select.blk_desc.density = st->density; 1624 if (st->flags & ST_DONTBUFFER) 1625 scsi_select.header.dev_spec |= SMH_DSP_BUFF_MODE_OFF; 1626 else 1627 scsi_select.header.dev_spec |= SMH_DSP_BUFF_MODE_ON; 1628 if (st->flags & ST_FIXEDBLOCKS) 1629 _lto3b(st->blksize, scsi_select.blk_desc.blklen); 1630 if (st->page_0_size) 1631 bcopy(st->sense_data, scsi_select.sense_data, st->page_0_size); 1632 1633 /* 1634 * do the command 1635 */ 1636 return (scsipi_command(sc_link, (struct scsipi_generic *)&cmd, 1637 sizeof(cmd), (u_char *)&scsi_select, scsi_select_len, 1638 ST_RETRIES, ST_CTL_TIME, NULL, flags | SCSI_DATA_OUT)); 1639 } 1640 1641 int 1642 st_cmprss(st, onoff) 1643 struct st_softc *st; 1644 int onoff; 1645 { 1646 u_int scsi_dlen; 1647 struct scsi_mode_select mcmd; 1648 struct scsi_mode_sense scmd; 1649 struct scsi_select { 1650 struct scsi_mode_header header; 1651 struct scsi_blk_desc blk_desc; 1652 u_char pdata[max(sizeof(struct scsi_tape_dev_conf_page), 1653 sizeof(struct scsi_tape_dev_compression_page))]; 1654 } scsi_pdata; 1655 struct scsi_tape_dev_conf_page *ptr; 1656 struct scsi_tape_dev_compression_page *cptr; 1657 struct scsipi_link *sc_link = st->sc_link; 1658 int error, ison, flags; 1659 1660 scsi_dlen = sizeof(scsi_pdata); 1661 bzero(&scsi_pdata, scsi_dlen); 1662 1663 /* 1664 * Set up for a mode sense. 1665 * Do DATA COMPRESSION page first. 1666 */ 1667 bzero(&scmd, sizeof(scmd)); 1668 scmd.opcode = SCSI_MODE_SENSE; 1669 scmd.page = SMS_PAGE_CTRL_CURRENT | 0xf; 1670 scmd.length = scsi_dlen; 1671 1672 flags = SCSI_SILENT; 1673 1674 /* 1675 * Do the MODE SENSE command... 1676 */ 1677 again: 1678 bzero(&scsi_pdata, scsi_dlen); 1679 error = scsipi_command(sc_link, 1680 (struct scsipi_generic *)&scmd, sizeof(scmd), 1681 (u_char *)&scsi_pdata, scsi_dlen, 1682 ST_RETRIES, ST_CTL_TIME, NULL, flags | SCSI_DATA_IN); 1683 1684 if (error) { 1685 if (scmd.byte2 != SMS_DBD) { 1686 scmd.byte2 = SMS_DBD; 1687 goto again; 1688 } 1689 /* 1690 * Try a different page? 1691 */ 1692 if (scmd.page == (SMS_PAGE_CTRL_CURRENT | 0xf)) { 1693 scmd.page = SMS_PAGE_CTRL_CURRENT | 0x10; 1694 scmd.byte2 = 0; 1695 goto again; 1696 } 1697 return (error); 1698 } 1699 1700 if (scsi_pdata.header.blk_desc_len) 1701 ptr = (struct scsi_tape_dev_conf_page *) scsi_pdata.pdata; 1702 else 1703 ptr = (struct scsi_tape_dev_conf_page *) &scsi_pdata.blk_desc; 1704 1705 if ((scmd.page & SMS_PAGE_CODE) == 0xf) { 1706 cptr = (struct scsi_tape_dev_compression_page *) ptr; 1707 ison = (cptr->dce_dcc & DCP_DCE) != 0; 1708 if (onoff) 1709 cptr->dce_dcc |= DCP_DCE; 1710 else 1711 cptr->dce_dcc &= ~DCP_DCE; 1712 cptr->pagecode &= ~0x80; 1713 } else { 1714 ison = (ptr->sel_comp_alg != 0); 1715 if (onoff) 1716 ptr->sel_comp_alg = 1; 1717 else 1718 ptr->sel_comp_alg = 0; 1719 ptr->pagecode &= ~0x80; 1720 ptr->byte2 = 0; 1721 ptr->active_partition = 0; 1722 ptr->wb_full_ratio = 0; 1723 ptr->rb_empty_ratio = 0; 1724 ptr->byte8 &= ~0x30; 1725 ptr->gap_size = 0; 1726 ptr->byte10 &= ~0xe7; 1727 ptr->ew_bufsize[0] = 0; 1728 ptr->ew_bufsize[1] = 0; 1729 ptr->ew_bufsize[2] = 0; 1730 ptr->reserved = 0; 1731 } 1732 onoff = onoff ? 1 : 0; 1733 /* 1734 * There might be a virtue in actually doing the MODE SELECTS, 1735 * but let's not clog the bus over it. 1736 */ 1737 if (onoff == ison) 1738 return (0); 1739 1740 /* 1741 * Set up for a mode select 1742 */ 1743 1744 scsi_pdata.header.data_length = 0; 1745 scsi_pdata.header.medium_type = 0; 1746 if ((st->flags & ST_DONTBUFFER) == 0) 1747 scsi_pdata.header.dev_spec = SMH_DSP_BUFF_MODE_ON; 1748 else 1749 scsi_pdata.header.dev_spec = 0; 1750 1751 bzero(&mcmd, sizeof(mcmd)); 1752 mcmd.opcode = SCSI_MODE_SELECT; 1753 mcmd.byte2 = SMS_PF; 1754 mcmd.length = scsi_dlen; 1755 if (scsi_pdata.header.blk_desc_len) { 1756 scsi_pdata.blk_desc.density = 0; 1757 scsi_pdata.blk_desc.nblocks[0] = 0; 1758 scsi_pdata.blk_desc.nblocks[1] = 0; 1759 scsi_pdata.blk_desc.nblocks[2] = 0; 1760 } 1761 1762 /* 1763 * Do the command 1764 */ 1765 error = scsipi_command(sc_link, 1766 (struct scsipi_generic *)&mcmd, sizeof(mcmd), 1767 (u_char *)&scsi_pdata, scsi_dlen, 1768 ST_RETRIES, ST_CTL_TIME, NULL, flags | SCSI_DATA_OUT); 1769 1770 if (error && (scmd.page & SMS_PAGE_CODE) == 0xf) { 1771 /* 1772 * Try DEVICE CONFIGURATION page. 1773 */ 1774 scmd.page = SMS_PAGE_CTRL_CURRENT | 0x10; 1775 goto again; 1776 } 1777 return (error); 1778 } 1779 /* 1780 * issue an erase command 1781 */ 1782 int 1783 st_erase(st, full, flags) 1784 struct st_softc *st; 1785 int full, flags; 1786 { 1787 int tmo; 1788 struct scsi_erase cmd; 1789 1790 /* 1791 * Full erase means set LONG bit in erase command, which asks 1792 * the drive to erase the entire unit. Without this bit, we're 1793 * asking the drive to write an erase gap. 1794 */ 1795 bzero(&cmd, sizeof(cmd)); 1796 cmd.opcode = ERASE; 1797 if (full) { 1798 cmd.byte2 = SE_IMMED|SE_LONG; 1799 tmo = ST_SPC_TIME; 1800 } else { 1801 tmo = ST_IO_TIME; 1802 cmd.byte2 = SE_IMMED; 1803 } 1804 1805 /* 1806 * XXX We always do this asynchronously, for now. How long should 1807 * we wait if we want to (eventually) to it synchronously? 1808 */ 1809 return (scsipi_command(st->sc_link, 1810 (struct scsipi_generic *)&cmd, sizeof(cmd), 1811 0, 0, ST_RETRIES, tmo, NULL, flags)); 1812 } 1813 1814 /* 1815 * skip N blocks/filemarks/seq filemarks/eom 1816 */ 1817 int 1818 st_space(st, number, what, flags) 1819 struct st_softc *st; 1820 u_int what; 1821 int flags; 1822 int number; 1823 { 1824 struct scsi_space cmd; 1825 int error; 1826 1827 switch (what) { 1828 case SP_BLKS: 1829 if (st->flags & ST_PER_ACTION) { 1830 if (number > 0) { 1831 st->flags &= ~ST_PER_ACTION; 1832 return (EIO); 1833 } else if (number < 0) { 1834 if (st->flags & ST_AT_FILEMARK) { 1835 /* 1836 * Handling of ST_AT_FILEMARK 1837 * in st_space will fill in the 1838 * right file mark count. 1839 */ 1840 error = st_space(st, 0, SP_FILEMARKS, 1841 flags); 1842 if (error) 1843 return (error); 1844 } 1845 if (st->flags & ST_BLANK_READ) { 1846 st->flags &= ~ST_BLANK_READ; 1847 return (EIO); 1848 } 1849 st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); 1850 } 1851 } 1852 break; 1853 case SP_FILEMARKS: 1854 if (st->flags & ST_EIO_PENDING) { 1855 if (number > 0) { 1856 /* pretend we just discovered the error */ 1857 st->flags &= ~ST_EIO_PENDING; 1858 return (EIO); 1859 } else if (number < 0) { 1860 /* back away from the error */ 1861 st->flags &= ~ST_EIO_PENDING; 1862 } 1863 } 1864 if (st->flags & ST_AT_FILEMARK) { 1865 st->flags &= ~ST_AT_FILEMARK; 1866 number--; 1867 } 1868 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 1869 /* back away from unwritten tape */ 1870 st->flags &= ~ST_BLANK_READ; 1871 number++; /* XXX dubious */ 1872 } 1873 break; 1874 case SP_EOM: 1875 if (st->flags & ST_EOM_PENDING) { 1876 /* we're already there */ 1877 st->flags &= ~ST_EOM_PENDING; 1878 return (0); 1879 } 1880 if (st->flags & ST_EIO_PENDING) { 1881 /* pretend we just discovered the error */ 1882 st->flags &= ~ST_EIO_PENDING; 1883 return (EIO); 1884 } 1885 if (st->flags & ST_AT_FILEMARK) 1886 st->flags &= ~ST_AT_FILEMARK; 1887 break; 1888 } 1889 if (number == 0) 1890 return (0); 1891 1892 bzero(&cmd, sizeof(cmd)); 1893 cmd.opcode = SPACE; 1894 cmd.byte2 = what; 1895 _lto3b(number, cmd.number); 1896 1897 return (scsipi_command(st->sc_link, 1898 (struct scsipi_generic *)&cmd, sizeof(cmd), 1899 0, 0, 0, ST_SPC_TIME, NULL, flags)); 1900 } 1901 1902 /* 1903 * write N filemarks 1904 */ 1905 int 1906 st_write_filemarks(st, number, flags) 1907 struct st_softc *st; 1908 int flags; 1909 int number; 1910 { 1911 struct scsi_write_filemarks cmd; 1912 1913 /* 1914 * It's hard to write a negative number of file marks. 1915 * Don't try. 1916 */ 1917 if (number < 0) 1918 return (EINVAL); 1919 switch (number) { 1920 case 0: /* really a command to sync the drive's buffers */ 1921 break; 1922 case 1: 1923 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 1924 st->flags &= ~ST_WRITTEN; 1925 else 1926 st->flags |= ST_FM_WRITTEN; 1927 st->flags &= ~ST_PER_ACTION; 1928 break; 1929 default: 1930 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 1931 } 1932 1933 bzero(&cmd, sizeof(cmd)); 1934 cmd.opcode = WRITE_FILEMARKS; 1935 _lto3b(number, cmd.number); 1936 1937 return (scsipi_command(st->sc_link, 1938 (struct scsipi_generic *)&cmd, sizeof(cmd), 1939 0, 0, 0, ST_IO_TIME * 4, NULL, flags)); 1940 } 1941 1942 /* 1943 * Make sure the right number of file marks is on tape if the 1944 * tape has been written. If the position argument is true, 1945 * leave the tape positioned where it was originally. 1946 * 1947 * nmarks returns the number of marks to skip (or, if position 1948 * true, which were skipped) to get back original position. 1949 */ 1950 int 1951 st_check_eod(st, position, nmarks, flags) 1952 struct st_softc *st; 1953 boolean position; 1954 int *nmarks; 1955 int flags; 1956 { 1957 int error; 1958 1959 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 1960 default: 1961 *nmarks = 0; 1962 return (0); 1963 case ST_WRITTEN: 1964 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 1965 *nmarks = 1; 1966 break; 1967 case ST_WRITTEN | ST_2FM_AT_EOD: 1968 *nmarks = 2; 1969 } 1970 error = st_write_filemarks(st, *nmarks, flags); 1971 if (position && !error) 1972 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 1973 return (error); 1974 } 1975 1976 /* 1977 * load/unload/retension 1978 */ 1979 int 1980 st_load(st, type, flags) 1981 struct st_softc *st; 1982 u_int type; 1983 int flags; 1984 { 1985 struct scsi_load cmd; 1986 1987 if (type != LD_LOAD) { 1988 int error; 1989 int nmarks; 1990 1991 error = st_check_eod(st, FALSE, &nmarks, flags); 1992 if (error) 1993 return (error); 1994 } 1995 if (st->quirks & ST_Q_IGNORE_LOADS) { 1996 if (type == LD_LOAD) { 1997 /* 1998 * If we ignore loads, at least we should try a rewind. 1999 */ 2000 return st_rewind(st, 0, flags); 2001 } 2002 return (0); 2003 } 2004 2005 bzero(&cmd, sizeof(cmd)); 2006 cmd.opcode = LOAD; 2007 cmd.how = type; 2008 2009 return (scsipi_command(st->sc_link, 2010 (struct scsipi_generic *)&cmd, sizeof(cmd), 2011 0, 0, ST_RETRIES, ST_SPC_TIME, NULL, flags)); 2012 } 2013 2014 /* 2015 * Rewind the device 2016 */ 2017 int 2018 st_rewind(st, immediate, flags) 2019 struct st_softc *st; 2020 u_int immediate; 2021 int flags; 2022 { 2023 struct scsi_rewind cmd; 2024 int error; 2025 int nmarks; 2026 2027 error = st_check_eod(st, FALSE, &nmarks, flags); 2028 if (error) 2029 return (error); 2030 st->flags &= ~ST_PER_ACTION; 2031 2032 bzero(&cmd, sizeof(cmd)); 2033 cmd.opcode = REWIND; 2034 cmd.byte2 = immediate; 2035 2036 return (scsipi_command(st->sc_link, 2037 (struct scsipi_generic *)&cmd, sizeof(cmd), 0, 0, ST_RETRIES, 2038 immediate ? ST_CTL_TIME: ST_SPC_TIME, NULL, flags)); 2039 } 2040 2041 int 2042 st_rdpos(st, hard, blkptr) 2043 struct st_softc *st; 2044 int hard; 2045 u_int32_t *blkptr; 2046 { 2047 int error; 2048 u_int8_t posdata[20]; 2049 struct scsi_tape_read_position cmd; 2050 2051 /* 2052 * First flush any pending writes... 2053 */ 2054 error = st_write_filemarks(st, 0, SCSI_SILENT); 2055 2056 /* 2057 * The latter case is for 'write protected' tapes 2058 * which are too stupid to recognize a zero count 2059 * for writing filemarks as a no-op. 2060 */ 2061 if (error != 0 && error != EACCES) 2062 return (error); 2063 2064 bzero(&cmd, sizeof(cmd)); 2065 bzero(&posdata, sizeof(posdata)); 2066 cmd.opcode = READ_POSITION; 2067 if (hard) 2068 cmd.byte1 = 1; 2069 2070 error = scsipi_command(st->sc_link, 2071 (struct scsipi_generic *)&cmd, sizeof(cmd), (u_char *)&posdata, 2072 sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, 2073 SCSI_SILENT | SCSI_DATA_IN); 2074 2075 if (error == 0) { 2076 #if 0 2077 printf("posdata:"); 2078 for (hard = 0; hard < sizeof(posdata); hard++) 2079 printf("%02x ", posdata[hard] & 0xff); 2080 printf("\n"); 2081 #endif 2082 if (posdata[0] & 0x4) /* Block Position Unknown */ 2083 error = EINVAL; 2084 else 2085 *blkptr = _4btol(&posdata[4]); 2086 } 2087 return (error); 2088 } 2089 2090 int 2091 st_setpos(st, hard, blkptr) 2092 struct st_softc *st; 2093 int hard; 2094 u_int32_t *blkptr; 2095 { 2096 int error; 2097 struct scsi_tape_locate cmd; 2098 2099 /* 2100 * First flush any pending writes. Strictly speaking, 2101 * we're not supposed to have to worry about this, 2102 * but let's be untrusting. 2103 */ 2104 error = st_write_filemarks(st, 0, SCSI_SILENT); 2105 2106 /* 2107 * The latter case is for 'write protected' tapes 2108 * which are too stupid to recognize a zero count 2109 * for writing filemarks as a no-op. 2110 */ 2111 if (error != 0 && error != EACCES) 2112 return (error); 2113 2114 bzero(&cmd, sizeof(cmd)); 2115 cmd.opcode = LOCATE; 2116 if (hard) 2117 cmd.byte2 = 1 << 2; 2118 _lto4b(*blkptr, cmd.blkaddr); 2119 error = scsipi_command(st->sc_link, 2120 (struct scsipi_generic *)&cmd, sizeof(cmd), 2121 NULL, 0, ST_RETRIES, ST_SPC_TIME, NULL, 0); 2122 /* 2123 * XXX: Note file && block number position now unknown (if 2124 * XXX: these things ever start being maintained in this driver) 2125 */ 2126 return (error); 2127 } 2128 2129 2130 /* 2131 * Look at the returned sense and act on the error and determine 2132 * the unix error number to pass back..., 0 (== report no error), 2133 * -1 = retry the operation, -2 continue error processing. 2134 */ 2135 int 2136 st_interpret_sense(xs) 2137 struct scsipi_xfer *xs; 2138 { 2139 struct scsipi_link *sc_link = xs->sc_link; 2140 struct scsipi_sense_data *sense = &xs->sense.scsi_sense; 2141 struct buf *bp = xs->bp; 2142 struct st_softc *st = sc_link->device_softc; 2143 int retval = SCSIRET_CONTINUE; 2144 int doprint = ((xs->flags & SCSI_SILENT) == 0); 2145 u_int8_t key; 2146 int32_t info; 2147 2148 /* 2149 * If it isn't a extended or extended/deferred error, let 2150 * the generic code handle it. 2151 */ 2152 if ((sense->error_code & SSD_ERRCODE) != 0x70 && 2153 (sense->error_code & SSD_ERRCODE) != 0x71) { /* DEFFERRED */ 2154 return (retval); 2155 } 2156 2157 if (sense->error_code & SSD_ERRCODE_VALID) 2158 info = _4btol(sense->info); 2159 else 2160 info = xs->datalen; /* bad choice if fixed blocks */ 2161 key = sense->flags & SSD_KEY; 2162 st->mt_erreg = key; 2163 st->mt_resid = (short) info; 2164 2165 /* 2166 * If the device is not open yet, let generic handle 2167 */ 2168 if ((sc_link->flags & SDEV_OPEN) == 0) { 2169 return (retval); 2170 } 2171 2172 2173 if (st->flags & ST_FIXEDBLOCKS) { 2174 xs->resid = info * st->blksize; 2175 if (sense->flags & SSD_EOM) { 2176 if ((st->flags & ST_EARLYWARN) == 0) 2177 st->flags |= ST_EIO_PENDING; 2178 st->flags |= ST_EOM_PENDING; 2179 if (bp) 2180 bp->b_resid = xs->resid; 2181 } 2182 if (sense->flags & SSD_FILEMARK) { 2183 st->flags |= ST_AT_FILEMARK; 2184 if (bp) 2185 bp->b_resid = xs->resid; 2186 } 2187 if (sense->flags & SSD_ILI) { 2188 st->flags |= ST_EIO_PENDING; 2189 if (bp) 2190 bp->b_resid = xs->resid; 2191 if (sense->error_code & SSD_ERRCODE_VALID && 2192 (xs->flags & SCSI_SILENT) == 0) 2193 printf("%s: block wrong size, %d blocks " 2194 "residual\n", st->sc_dev.dv_xname, info); 2195 2196 /* 2197 * This quirk code helps the drive read 2198 * the first tape block, regardless of 2199 * format. That is required for these 2200 * drives to return proper MODE SENSE 2201 * information. 2202 */ 2203 if ((st->quirks & ST_Q_SENSE_HELP) && 2204 !(sc_link->flags & SDEV_MEDIA_LOADED)) 2205 st->blksize -= 512; 2206 } 2207 /* 2208 * If data wanted and no data was tranfered, do it immediatly 2209 */ 2210 if (xs->datalen && xs->resid >= xs->datalen) { 2211 if (st->flags & ST_EIO_PENDING) 2212 return (EIO); 2213 if (st->flags & ST_AT_FILEMARK) { 2214 if (bp) 2215 bp->b_resid = xs->resid; 2216 return (SCSIRET_NOERROR); 2217 } 2218 } 2219 } else { /* must be variable mode */ 2220 if (sense->flags & SSD_EOM) { 2221 /* 2222 * The current semantics of this 2223 * driver requires EOM detection 2224 * to return EIO unless early 2225 * warning detection is enabled 2226 * for variable mode (this is always 2227 * on for fixed block mode). 2228 */ 2229 if (st->flags & ST_EARLYWARN) { 2230 st->flags |= ST_EOM_PENDING; 2231 retval = SCSIRET_NOERROR; 2232 } else { 2233 retval = EIO; 2234 } 2235 2236 /* 2237 * If it's an unadorned EOM detection, 2238 * suppress printing an error. 2239 */ 2240 if (key == SKEY_NO_SENSE) { 2241 doprint = 0; 2242 } 2243 } else if (sense->flags & SSD_FILEMARK) { 2244 retval = SCSIRET_NOERROR; 2245 } else if (sense->flags & SSD_ILI) { 2246 if (info < 0) { 2247 /* 2248 * The tape record was bigger than the read 2249 * we issued. 2250 */ 2251 if ((xs->flags & SCSI_SILENT) == 0) { 2252 printf("%s: %d-byte tape record too big" 2253 " for %d-byte user buffer\n", 2254 st->sc_dev.dv_xname, 2255 xs->datalen - info, xs->datalen); 2256 } 2257 retval = EIO; 2258 } else { 2259 retval = SCSIRET_NOERROR; 2260 } 2261 } 2262 xs->resid = info; 2263 if (bp) 2264 bp->b_resid = info; 2265 } 2266 2267 #ifndef SCSIDEBUG 2268 if (retval == SCSIRET_NOERROR && key == SKEY_NO_SENSE) { 2269 doprint = 0; 2270 } 2271 #endif 2272 if (key == SKEY_BLANK_CHECK) { 2273 /* 2274 * This quirk code helps the drive read the 2275 * first tape block, regardless of format. That 2276 * is required for these drives to return proper 2277 * MODE SENSE information. 2278 */ 2279 if ((st->quirks & ST_Q_SENSE_HELP) && 2280 !(sc_link->flags & SDEV_MEDIA_LOADED)) { 2281 /* still starting */ 2282 st->blksize -= 512; 2283 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 2284 st->flags |= ST_BLANK_READ; 2285 xs->resid = xs->datalen; 2286 if (bp) { 2287 bp->b_resid = xs->resid; 2288 /* return an EOF */ 2289 } 2290 retval = SCSIRET_NOERROR; 2291 } 2292 } 2293 #ifdef SCSIVERBOSE 2294 if (doprint) { 2295 scsi_print_sense(xs, 0); 2296 } 2297 #else 2298 if (doprint) { 2299 xs->sc_link->sc_print_addr(xs->sc_link); 2300 printf("Sense Key 0x%02x", key); 2301 if ((sense->error_code & SSD_ERRCODE_VALID) != 0) { 2302 switch (key) { 2303 case SKEY_NOT_READY: 2304 case SKEY_ILLEGAL_REQUEST: 2305 case SKEY_UNIT_ATTENTION: 2306 case SKEY_WRITE_PROTECT: 2307 break; 2308 case SKEY_BLANK_CHECK: 2309 printf(", requested size: %d (decimal)", info); 2310 break; 2311 case SKEY_ABORTED_COMMAND: 2312 if (xs->retries) 2313 printf(", retrying"); 2314 printf(", cmd 0x%x, info 0x%x", 2315 xs->cmd->opcode, info); 2316 break; 2317 default: 2318 printf(", info = %d (decimal)", info); 2319 } 2320 } 2321 if (sense->extra_len != 0) { 2322 int n; 2323 printf(", data ="); 2324 for (n = 0; n < sense->extra_len; n++) 2325 printf(" %02x", sense->cmd_spec_info[n]); 2326 } 2327 printf("\n"); 2328 } 2329 #endif 2330 return (retval); 2331 } 2332 2333 /* 2334 * The quirk here is that the drive returns some value to st_mode_sense 2335 * incorrectly until the tape has actually passed by the head. 2336 * 2337 * The method is to set the drive to large fixed-block state (user-specified 2338 * density and 1024-byte blocks), then read and rewind to get it to sense the 2339 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 2340 * work, as a last resort, try variable- length blocks. The result will be 2341 * the ability to do an accurate st_mode_sense. 2342 * 2343 * We know we can do a rewind because we just did a load, which implies rewind. 2344 * Rewind seems preferable to space backward if we have a virgin tape. 2345 * 2346 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 2347 * error processing, both part of st_interpret_sense. 2348 */ 2349 int 2350 st_touch_tape(st) 2351 struct st_softc *st; 2352 { 2353 char *buf; 2354 int readsize; 2355 int error; 2356 2357 buf = malloc(1024, M_TEMP, M_NOWAIT); 2358 if (buf == NULL) 2359 return (ENOMEM); 2360 2361 if ((error = st_mode_sense(st, 0)) != 0) 2362 goto bad; 2363 st->blksize = 1024; 2364 do { 2365 switch (st->blksize) { 2366 case 512: 2367 case 1024: 2368 readsize = st->blksize; 2369 st->flags |= ST_FIXEDBLOCKS; 2370 break; 2371 default: 2372 readsize = 1; 2373 st->flags &= ~ST_FIXEDBLOCKS; 2374 } 2375 if ((error = st_mode_select(st, 0)) != 0) 2376 goto bad; 2377 st_read(st, buf, readsize, SCSI_SILENT); /* XXX */ 2378 if ((error = st_rewind(st, 0, 0)) != 0) { 2379 bad: free(buf, M_TEMP); 2380 return (error); 2381 } 2382 } while (readsize != 1 && readsize > st->blksize); 2383 2384 free(buf, M_TEMP); 2385 return (0); 2386 } 2387 2388 int 2389 stdump(dev, blkno, va, size) 2390 dev_t dev; 2391 daddr_t blkno; 2392 caddr_t va; 2393 size_t size; 2394 { 2395 2396 /* Not implemented. */ 2397 return (ENXIO); 2398 } 2399
Indexes created Mon Sep 22 13:09:51 GMT 2025