1 /* $NetBSD: st.c,v 1.104 1998/09/11 20:10:15 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@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@tfs.com) Sept 1992 54 * major changes by Julian Elischer (julian@jules.dialix.oz.au) May 1993 55 * 56 * A lot of rewhacking done by mjacob (mjacob@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 * lacking a manual for the 4200, it's not clear what the 155 * specific density codes should be- the device is a 2.5GB 156 * capable QIC drive, those density codes aren't readily 157 * availabel. The 'default' will just have to do. 158 */ 159 {{T_SEQUENTIAL, T_REMOV, 160 "TANDBERG", " TDC 4200 ", ""}, {0, 0, { 161 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 162 {0, 0, QIC_525}, /* minor 4-7 */ 163 {0, 0, QIC_150}, /* minor 8-11 */ 164 {0, 0, QIC_120} /* minor 12-15 */ 165 }}}, 166 /* 167 * At least -005 and -007 need this. I'll assume they all do unless I 168 * hear otherwise. - mycroft, 31MAR1994 169 */ 170 {{T_SEQUENTIAL, T_REMOV, 171 "ARCHIVE ", "VIPER 2525 25462", ""}, {0, 0, { 172 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 173 {ST_Q_SENSE_HELP, 0, QIC_525}, /* minor 4-7 */ 174 {0, 0, QIC_150}, /* minor 8-11 */ 175 {0, 0, QIC_120} /* minor 12-15 */ 176 }}}, 177 /* 178 * One user reports that this works for his tape drive. It probably 179 * needs more work. - mycroft, 09APR1994 180 */ 181 {{T_SEQUENTIAL, T_REMOV, 182 "SANKYO ", "CP525 ", ""}, {0, 0, { 183 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 184 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 185 {0, 0, QIC_150}, /* minor 8-11 */ 186 {0, 0, QIC_120} /* minor 12-15 */ 187 }}}, 188 {{T_SEQUENTIAL, T_REMOV, 189 "ANRITSU ", "DMT780 ", ""}, {0, 0, { 190 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 191 {ST_Q_FORCE_BLKSIZE, 512, 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 "ARCHIVE ", "VIPER 150 21247", ""}, {0, 12, { 197 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 198 {0, 0, QIC_150}, /* minor 4-7 */ 199 {0, 0, QIC_120}, /* minor 8-11 */ 200 {0, 0, QIC_24} /* minor 12-15 */ 201 }}}, 202 {{T_SEQUENTIAL, T_REMOV, 203 "ARCHIVE ", "VIPER 150 21531", ""}, {0, 12, { 204 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 205 {0, 0, QIC_150}, /* minor 4-7 */ 206 {0, 0, QIC_120}, /* minor 8-11 */ 207 {0, 0, QIC_24} /* minor 12-15 */ 208 }}}, 209 {{T_SEQUENTIAL, T_REMOV, 210 "WANGTEK ", "5099ES SCSI", ""}, {0, 0, { 211 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 212 {0, 0, QIC_11}, /* minor 4-7 */ 213 {0, 0, QIC_24}, /* minor 8-11 */ 214 {0, 0, QIC_24} /* minor 12-15 */ 215 }}}, 216 {{T_SEQUENTIAL, T_REMOV, 217 "WANGTEK ", "5150ES SCSI", ""}, {0, 0, { 218 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 219 {0, 0, QIC_24}, /* minor 4-7 */ 220 {0, 0, QIC_120}, /* minor 8-11 */ 221 {0, 0, QIC_150} /* minor 12-15 */ 222 }}}, 223 {{T_SEQUENTIAL, T_REMOV, 224 "WANGTEK ", "5525ES SCSI REV7", ""}, {0, 0, { 225 {0, 0, 0}, /* minor 0-3 */ 226 {ST_Q_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 227 {0, 0, QIC_150}, /* minor 8-11 */ 228 {0, 0, QIC_120} /* minor 12-15 */ 229 }}}, 230 {{T_SEQUENTIAL, T_REMOV, 231 "WangDAT ", "Model 1300 ", ""}, {0, 0, { 232 {0, 0, 0}, /* minor 0-3 */ 233 {ST_Q_FORCE_BLKSIZE, 512, DDS}, /* minor 4-7 */ 234 {ST_Q_FORCE_BLKSIZE, 1024, DDS}, /* minor 8-11 */ 235 {ST_Q_FORCE_BLKSIZE, 0, DDS} /* minor 12-15 */ 236 }}}, 237 {{T_SEQUENTIAL, T_REMOV, 238 "EXABYTE ", "EXB-8200 ", "263H"}, {0, 5, { 239 {0, 0, 0}, /* minor 0-3 */ 240 {0, 0, 0}, /* minor 4-7 */ 241 {0, 0, 0}, /* minor 8-11 */ 242 {0, 0, 0} /* minor 12-15 */ 243 }}}, 244 {{T_SEQUENTIAL, T_REMOV, 245 "STK", "9490", ""}, 246 {ST_Q_FORCE_BLKSIZE|ST_Q_IGNORE_LOADS, 0, { 247 {0, 0, 0}, /* minor 0-3 */ 248 {0, 0, 0}, /* minor 4-7 */ 249 {0, 0, 0}, /* minor 8-11 */ 250 {0, 0, 0} /* minor 12-15 */ 251 }}}, 252 {{T_SEQUENTIAL, T_REMOV, 253 "STK", "SD-3", ""}, 254 {ST_Q_FORCE_BLKSIZE|ST_Q_IGNORE_LOADS, 0, { 255 {0, 0, 0}, /* minor 0-3 */ 256 {0, 0, 0}, /* minor 4-7 */ 257 {0, 0, 0}, /* minor 8-11 */ 258 {0, 0, 0} /* minor 12-15 */ 259 }}}, 260 {{T_SEQUENTIAL, T_REMOV, 261 "IBM", "03590", ""}, {ST_Q_IGNORE_LOADS, 0, { 262 {0, 0, 0}, /* minor 0-3 */ 263 {0, 0, 0}, /* minor 4-7 */ 264 {0, 0, 0}, /* minor 8-11 */ 265 {0, 0, 0} /* minor 12-15 */ 266 }}}, 267 {{T_SEQUENTIAL, T_REMOV, 268 "HP ", "T4000s ", ""}, {ST_Q_UNIMODAL, 0, { 269 {0, 0, QIC_3095}, /* minor 0-3 */ 270 {0, 0, QIC_3095}, /* minor 4-7 */ 271 {0, 0, QIC_3095}, /* minor 8-11 */ 272 {0, 0, QIC_3095}, /* minor 12-15 */ 273 }}}, 274 #if 0 275 {{T_SEQUENTIAL, T_REMOV, 276 "EXABYTE ", "EXB-8200 ", ""}, {0, 12, { 277 {0, 0, 0}, /* minor 0-3 */ 278 {0, 0, 0}, /* minor 4-7 */ 279 {0, 0, 0}, /* minor 8-11 */ 280 {0, 0, 0} /* minor 12-15 */ 281 }}}, 282 #endif 283 }; 284 285 #define NOEJECT 0 286 #define EJECT 1 287 288 struct st_softc { 289 struct device sc_dev; 290 /*--------------------present operating parameters, flags etc.---------------*/ 291 int flags; /* see below */ 292 u_int quirks; /* quirks for the open mode */ 293 int blksize; /* blksize we are using */ 294 u_int8_t density; /* present density */ 295 u_int page_0_size; /* size of page 0 data */ 296 u_int last_dsty; /* last density opened */ 297 short mt_resid; /* last (short) resid */ 298 short mt_erreg; /* last error (sense key) seen */ 299 /*--------------------device/scsi parameters---------------------------------*/ 300 struct scsipi_link *sc_link; /* our link to the adpter etc. */ 301 /*--------------------parameters reported by the device ---------------------*/ 302 int blkmin; /* min blk size */ 303 int blkmax; /* max blk size */ 304 struct quirkdata *quirkdata; /* if we have a rogue entry */ 305 /*--------------------parameters reported by the device for this media-------*/ 306 u_long numblks; /* nominal blocks capacity */ 307 int media_blksize; /* 0 if not ST_FIXEDBLOCKS */ 308 u_int8_t media_density; /* this is what it said when asked */ 309 /*--------------------quirks for the whole drive-----------------------------*/ 310 u_int drive_quirks; /* quirks of this drive */ 311 /*--------------------How we should set up when opening each minor device----*/ 312 struct modes modes[4]; /* plus more for each mode */ 313 u_int8_t modeflags[4]; /* flags for the modes */ 314 #define DENSITY_SET_BY_USER 0x01 315 #define DENSITY_SET_BY_QUIRK 0x02 316 #define BLKSIZE_SET_BY_USER 0x04 317 #define BLKSIZE_SET_BY_QUIRK 0x08 318 /*--------------------storage for sense data returned by the drive-----------*/ 319 u_char sense_data[MAX_PAGE_0_SIZE]; /* 320 * additional sense data needed 321 * for mode sense/select. 322 */ 323 struct buf buf_queue; /* the queue of pending IO */ 324 /* operations */ 325 #if NRND > 0 326 rndsource_element_t rnd_source; 327 #endif 328 }; 329 330 331 int stmatch __P((struct device *, struct cfdata *, void *)); 332 void stattach __P((struct device *, struct device *, void *)); 333 void st_identify_drive __P((struct st_softc *, 334 struct scsipi_inquiry_pattern *)); 335 void st_loadquirks __P((struct st_softc *)); 336 int st_mount_tape __P((dev_t, int)); 337 void st_unmount __P((struct st_softc *, boolean)); 338 int st_decide_mode __P((struct st_softc *, boolean)); 339 void ststart __P((void *)); 340 void stdone __P((struct scsipi_xfer *)); 341 int st_read __P((struct st_softc *, char *, int, int)); 342 int st_read_block_limits __P((struct st_softc *, int)); 343 int st_mode_sense __P((struct st_softc *, int)); 344 int st_mode_select __P((struct st_softc *, int)); 345 int st_cmprss __P((struct st_softc *, int)); 346 int st_space __P((struct st_softc *, int, u_int, int)); 347 int st_write_filemarks __P((struct st_softc *, int, int)); 348 int st_check_eod __P((struct st_softc *, boolean, int *, int)); 349 int st_load __P((struct st_softc *, u_int, int)); 350 int st_rewind __P((struct st_softc *, u_int, int)); 351 int st_interpret_sense __P((struct scsipi_xfer *)); 352 int st_touch_tape __P((struct st_softc *)); 353 int st_erase __P((struct st_softc *, int full, int flags)); 354 int st_rdpos __P((struct st_softc *, int, u_int32_t *)); 355 int st_setpos __P((struct st_softc *, int, u_int32_t *)); 356 357 struct cfattach st_ca = { 358 sizeof(struct st_softc), stmatch, stattach 359 }; 360 361 extern struct cfdriver st_cd; 362 363 struct scsipi_device st_switch = { 364 st_interpret_sense, 365 ststart, 366 NULL, 367 stdone 368 }; 369 370 #define ST_INFO_VALID 0x0001 371 #define ST_BLOCK_SET 0x0002 /* block size, mode set by ioctl */ 372 #define ST_WRITTEN 0x0004 /* data has been written, EOD needed */ 373 #define ST_FIXEDBLOCKS 0x0008 374 #define ST_AT_FILEMARK 0x0010 375 #define ST_EIO_PENDING 0x0020 /* error reporting deferred until next op */ 376 #define ST_NEW_MOUNT 0x0040 /* still need to decide mode */ 377 #define ST_READONLY 0x0080 /* st_mode_sense says write protected */ 378 #define ST_FM_WRITTEN 0x0100 /* 379 * EOF file mark written -- used with 380 * ~ST_WRITTEN to indicate that multiple file 381 * marks have been written 382 */ 383 #define ST_BLANK_READ 0x0200 /* BLANK CHECK encountered already */ 384 #define ST_2FM_AT_EOD 0x0400 /* write 2 file marks at EOD */ 385 #define ST_MOUNTED 0x0800 /* Device is presently mounted */ 386 #define ST_DONTBUFFER 0x1000 /* Disable buffering/caching */ 387 #define ST_EARLYWARN 0x2000 /* Do (deferred) EOM for variable mode */ 388 #define ST_EOM_PENDING 0x4000 /* EOM reporting deferred until next op */ 389 390 #define ST_PER_ACTION (ST_AT_FILEMARK | ST_EIO_PENDING | ST_EOM_PENDING | \ 391 ST_BLANK_READ) 392 #define ST_PER_MOUNT (ST_INFO_VALID | ST_BLOCK_SET | ST_WRITTEN | \ 393 ST_FIXEDBLOCKS | ST_READONLY | ST_FM_WRITTEN | \ 394 ST_2FM_AT_EOD | ST_PER_ACTION) 395 396 #if defined(ST_ENABLE_EARLYWARN) 397 #define ST_INIT_FLAGS ST_EARLYWARN 398 #else 399 #define ST_INIT_FLAGS 0 400 #endif 401 402 struct scsipi_inquiry_pattern st_patterns[] = { 403 {T_SEQUENTIAL, T_REMOV, 404 "", "", ""}, 405 }; 406 407 int 408 stmatch(parent, match, aux) 409 struct device *parent; 410 struct cfdata *match; 411 void *aux; 412 { 413 struct scsipibus_attach_args *sa = aux; 414 int priority; 415 416 (void)scsipi_inqmatch(&sa->sa_inqbuf, 417 (caddr_t)st_patterns, sizeof(st_patterns)/sizeof(st_patterns[0]), 418 sizeof(st_patterns[0]), &priority); 419 return (priority); 420 } 421 422 /* 423 * The routine called by the low level scsi routine when it discovers 424 * A device suitable for this driver 425 */ 426 void 427 stattach(parent, self, aux) 428 struct device *parent, *self; 429 void *aux; 430 { 431 struct st_softc *st = (void *)self; 432 struct scsipibus_attach_args *sa = aux; 433 struct scsipi_link *sc_link = sa->sa_sc_link; 434 435 SC_DEBUG(sc_link, SDEV_DB2, ("stattach: ")); 436 437 /* 438 * Store information needed to contact our base driver 439 */ 440 st->sc_link = sc_link; 441 sc_link->device = &st_switch; 442 sc_link->device_softc = st; 443 sc_link->openings = 1; 444 445 /* 446 * Set initial flags 447 */ 448 449 st->flags = ST_INIT_FLAGS; 450 451 /* 452 * Check if the drive is a known criminal and take 453 * Any steps needed to bring it into line 454 */ 455 st_identify_drive(st, &sa->sa_inqbuf); 456 /* 457 * Use the subdriver to request information regarding 458 * the drive. We cannot use interrupts yet, so the 459 * request must specify this. 460 */ 461 printf("\n"); 462 printf("%s: %s", st->sc_dev.dv_xname, st->quirkdata ? "rogue, " : ""); 463 if (scsipi_test_unit_ready(sc_link, 464 SCSI_AUTOCONF | SCSI_SILENT | SCSI_IGNORE_MEDIA_CHANGE) || 465 st_mode_sense(st, 466 SCSI_AUTOCONF | SCSI_SILENT | SCSI_IGNORE_MEDIA_CHANGE)) 467 printf("drive empty\n"); 468 else { 469 printf("density code 0x%x, ", st->media_density); 470 if (st->media_blksize > 0) 471 printf("%d-byte", st->media_blksize); 472 else 473 printf("variable"); 474 printf(" blocks, write-%s\n", 475 (st->flags & ST_READONLY) ? "protected" : "enabled"); 476 } 477 478 /* 479 * Set up the buf queue for this device 480 */ 481 st->buf_queue.b_active = 0; 482 st->buf_queue.b_actf = 0; 483 st->buf_queue.b_actb = &st->buf_queue.b_actf; 484 485 #if NRND > 0 486 rnd_attach_source(&st->rnd_source, st->sc_dev.dv_xname, RND_TYPE_TAPE); 487 #endif 488 } 489 490 /* 491 * Use the inquiry routine in 'scsi_base' to get drive info so we can 492 * Further tailor our behaviour. 493 */ 494 void 495 st_identify_drive(st, inqbuf) 496 struct st_softc *st; 497 struct scsipi_inquiry_pattern *inqbuf; 498 { 499 struct st_quirk_inquiry_pattern *finger; 500 int priority; 501 502 finger = (struct st_quirk_inquiry_pattern *)scsipi_inqmatch(inqbuf, 503 (caddr_t)st_quirk_patterns, 504 sizeof(st_quirk_patterns) / sizeof(st_quirk_patterns[0]), 505 sizeof(st_quirk_patterns[0]), &priority); 506 if (priority != 0) { 507 st->quirkdata = &finger->quirkdata; 508 st->drive_quirks = finger->quirkdata.quirks; 509 st->quirks = finger->quirkdata.quirks; /* start value */ 510 st->page_0_size = finger->quirkdata.page_0_size; 511 st_loadquirks(st); 512 } 513 } 514 515 /* 516 * initialise the subdevices to the default (QUIRK) state. 517 * this will remove any setting made by the system operator or previous 518 * operations. 519 */ 520 void 521 st_loadquirks(st) 522 struct st_softc *st; 523 { 524 int i; 525 struct modes *mode; 526 struct modes *mode2; 527 528 mode = st->quirkdata->modes; 529 mode2 = st->modes; 530 for (i = 0; i < 4; i++) { 531 bzero(mode2, sizeof(struct modes)); 532 st->modeflags[i] &= ~(BLKSIZE_SET_BY_QUIRK | 533 DENSITY_SET_BY_QUIRK | BLKSIZE_SET_BY_USER | 534 DENSITY_SET_BY_USER); 535 if ((mode->quirks | st->drive_quirks) & ST_Q_FORCE_BLKSIZE) { 536 mode2->blksize = mode->blksize; 537 st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; 538 } 539 if (mode->density) { 540 mode2->density = mode->density; 541 st->modeflags[i] |= DENSITY_SET_BY_QUIRK; 542 } 543 mode++; 544 mode2++; 545 } 546 } 547 548 /* 549 * open the device. 550 */ 551 int 552 stopen(dev, flags, mode, p) 553 dev_t dev; 554 int flags; 555 int mode; 556 struct proc *p; 557 { 558 int unit; 559 u_int stmode, dsty; 560 int error = 0; 561 struct st_softc *st; 562 struct scsipi_link *sc_link; 563 564 unit = STUNIT(dev); 565 if (unit >= st_cd.cd_ndevs) 566 return (ENXIO); 567 st = st_cd.cd_devs[unit]; 568 if (st == NULL) 569 return (ENXIO); 570 571 stmode = STMODE(dev); 572 dsty = STDSTY(dev); 573 sc_link = st->sc_link; 574 575 SC_DEBUG(sc_link, SDEV_DB1, ("open: dev=0x%x (unit %d (of %d))\n", dev, 576 unit, st_cd.cd_ndevs)); 577 578 579 /* 580 * Only allow one at a time 581 */ 582 if (sc_link->flags & SDEV_OPEN) { 583 printf("%s: already open\n", st->sc_dev.dv_xname); 584 return (EBUSY); 585 } 586 587 /* 588 * clear any latched errors. 589 */ 590 st->mt_resid = 0; 591 st->mt_erreg = 0; 592 593 /* 594 * Catch any unit attention errors. 595 */ 596 error = scsipi_test_unit_ready(sc_link, SCSI_IGNORE_MEDIA_CHANGE | 597 (stmode == CTRL_MODE ? SCSI_SILENT : 0)); 598 if (error && stmode != CTRL_MODE) { 599 goto bad; 600 } 601 sc_link->flags |= SDEV_OPEN; /* unit attn are now errors */ 602 603 /* 604 * If the mode is 3 (e.g. minor = 3,7,11,15) then the device has 605 * been opened to set defaults and perform other, usually non-I/O 606 * related, operations. In this case, do a quick check to see 607 * whether the unit actually had a tape loaded (this will be known 608 * as to whether or not we got a NOT READY for the above 609 * unit attention). If a tape is there, go do a mount sequence. 610 */ 611 if (stmode == CTRL_MODE && st->mt_erreg == SKEY_NOT_READY) { 612 return (0); 613 } 614 615 /* 616 * If it's a different mode, or if the media has been 617 * invalidated, unmount the tape from the previous 618 * session but continue with open processing 619 */ 620 if (st->last_dsty != dsty || !(sc_link->flags & SDEV_MEDIA_LOADED)) 621 st_unmount(st, NOEJECT); 622 623 /* 624 * If we are not mounted, then we should start a new 625 * mount session. 626 */ 627 if (!(st->flags & ST_MOUNTED)) { 628 st_mount_tape(dev, flags); 629 st->last_dsty = dsty; 630 } 631 632 SC_DEBUG(sc_link, SDEV_DB2, ("open complete\n")); 633 return (0); 634 635 bad: 636 st_unmount(st, NOEJECT); 637 sc_link->flags &= ~SDEV_OPEN; 638 return (error); 639 } 640 641 /* 642 * close the device.. only called if we are the LAST 643 * occurence of an open device 644 */ 645 int 646 stclose(dev, flags, mode, p) 647 dev_t dev; 648 int flags; 649 int mode; 650 struct proc *p; 651 { 652 int stxx, error = 0; 653 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 654 655 SC_DEBUG(st->sc_link, SDEV_DB1, ("closing\n")); 656 657 /* 658 * Make sure that a tape opened in write-only mode will have 659 * file marks written on it when closed, even if not written to. 660 * 661 * This is for SUN compatibility. Actually, the Sun way of 662 * things is to: 663 * 664 * only write filemarks if there are fmks to be written and 665 * - open for write (possibly read/write) 666 * - the last operation was a write 667 * or: 668 * - opened for wronly 669 * - no data was written (including filemarks) 670 */ 671 672 stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); 673 if (((flags & FWRITE) && stxx == ST_WRITTEN) || 674 ((flags & O_ACCMODE) == FWRITE && stxx == 0)) { 675 int nm; 676 error = st_check_eod(st, FALSE, &nm, 0); 677 } 678 679 switch (STMODE(dev)) { 680 case NORMAL_MODE: 681 st_unmount(st, NOEJECT); 682 break; 683 case NOREW_MODE: 684 case CTRL_MODE: 685 /* 686 * Leave mounted unless media seems to have been removed. 687 * 688 * Otherwise, if we're to terminate a tape with more than one 689 * filemark [ and because we're not rewinding here ], backspace 690 * one filemark so that later appends will see an unbroken 691 * sequence of: 692 * 693 * file - FMK - file - FMK ... file - FMK FMK (EOM) 694 */ 695 if (!(st->sc_link->flags & SDEV_MEDIA_LOADED)) { 696 st_unmount(st, NOEJECT); 697 } else if (error == 0) { 698 /* 699 * ST_WRITTEN was preserved from above. 700 * 701 * All we need to know here is: 702 * 703 * Were we writing this tape and was the last 704 * operation a write? 705 * 706 * Are there supposed to be 2FM at EOD? 707 * 708 * If both statements are true, then we backspace 709 * one filemark. 710 */ 711 stxx |= (st->flags & ST_2FM_AT_EOD); 712 if ((flags & FWRITE) != 0 && 713 (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { 714 error = st_space(st, -1, SP_FILEMARKS, 0); 715 } 716 } 717 break; 718 case EJECT_MODE: 719 st_unmount(st, EJECT); 720 break; 721 } 722 st->sc_link->flags &= ~SDEV_OPEN; 723 724 return (error); 725 } 726 727 /* 728 * Start a new mount session. 729 * Copy in all the default parameters from the selected device mode. 730 * and try guess any that seem to be defaulted. 731 */ 732 int 733 st_mount_tape(dev, flags) 734 dev_t dev; 735 int flags; 736 { 737 int unit; 738 u_int dsty; 739 struct st_softc *st; 740 struct scsipi_link *sc_link; 741 int error = 0; 742 743 unit = STUNIT(dev); 744 dsty = STDSTY(dev); 745 st = st_cd.cd_devs[unit]; 746 sc_link = st->sc_link; 747 748 if (st->flags & ST_MOUNTED) 749 return (0); 750 751 SC_DEBUG(sc_link, SDEV_DB1, ("mounting\n ")); 752 st->flags |= ST_NEW_MOUNT; 753 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 754 /* 755 * If the media is new, then make sure we give it a chance to 756 * to do a 'load' instruction. (We assume it is new.) 757 */ 758 if ((error = st_load(st, LD_LOAD, 0)) != 0) 759 return (error); 760 /* 761 * Throw another dummy instruction to catch 762 * 'Unit attention' errors. Many drives give 763 * these after doing a Load instruction (with 764 * the MEDIUM MAY HAVE CHANGED asc/ascq). 765 */ 766 scsipi_test_unit_ready(sc_link, SCSI_SILENT); /* XXX */ 767 768 /* 769 * Some devices can't tell you much until they have been 770 * asked to look at the media. This quirk does this. 771 */ 772 if (st->quirks & ST_Q_SENSE_HELP) 773 if ((error = st_touch_tape(st)) != 0) 774 return (error); 775 /* 776 * Load the physical device parameters 777 * loads: blkmin, blkmax 778 */ 779 if ((error = st_read_block_limits(st, 0)) != 0) 780 return (error); 781 /* 782 * Load the media dependent parameters 783 * includes: media_blksize,media_density,numblks 784 * As we have a tape in, it should be reflected here. 785 * If not you may need the "quirk" above. 786 */ 787 if ((error = st_mode_sense(st, 0)) != 0) 788 return (error); 789 /* 790 * If we have gained a permanent density from somewhere, 791 * then use it in preference to the one supplied by 792 * default by the driver. 793 */ 794 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 795 st->density = st->modes[dsty].density; 796 else 797 st->density = st->media_density; 798 /* 799 * If we have gained a permanent blocksize 800 * then use it in preference to the one supplied by 801 * default by the driver. 802 */ 803 st->flags &= ~ST_FIXEDBLOCKS; 804 if (st->modeflags[dsty] & 805 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 806 st->blksize = st->modes[dsty].blksize; 807 if (st->blksize) 808 st->flags |= ST_FIXEDBLOCKS; 809 } else { 810 if ((error = st_decide_mode(st, FALSE)) != 0) 811 return (error); 812 } 813 if ((error = st_mode_select(st, 0)) != 0) { 814 printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); 815 return (error); 816 } 817 scsipi_prevent(sc_link, PR_PREVENT, 818 SCSI_IGNORE_ILLEGAL_REQUEST | SCSI_IGNORE_NOT_READY); 819 st->flags &= ~ST_NEW_MOUNT; 820 st->flags |= ST_MOUNTED; 821 sc_link->flags |= SDEV_MEDIA_LOADED; /* move earlier? */ 822 823 return (0); 824 } 825 826 /* 827 * End the present mount session. 828 * Rewind, and optionally eject the tape. 829 * Reset various flags to indicate that all new 830 * operations require another mount operation 831 */ 832 void 833 st_unmount(st, eject) 834 struct st_softc *st; 835 boolean eject; 836 { 837 struct scsipi_link *sc_link = st->sc_link; 838 int nmarks; 839 840 if (!(st->flags & ST_MOUNTED)) 841 return; 842 SC_DEBUG(sc_link, SDEV_DB1, ("unmounting\n")); 843 st_check_eod(st, FALSE, &nmarks, SCSI_IGNORE_NOT_READY); 844 st_rewind(st, 0, SCSI_IGNORE_NOT_READY); 845 scsipi_prevent(sc_link, PR_ALLOW, 846 SCSI_IGNORE_ILLEGAL_REQUEST | SCSI_IGNORE_NOT_READY); 847 if (eject) 848 st_load(st, LD_UNLOAD, SCSI_IGNORE_NOT_READY); 849 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 850 sc_link->flags &= ~SDEV_MEDIA_LOADED; 851 } 852 853 /* 854 * Given all we know about the device, media, mode, 'quirks' and 855 * initial operation, make a decision as to how we should be set 856 * to run (regarding blocking and EOD marks) 857 */ 858 int 859 st_decide_mode(st, first_read) 860 struct st_softc *st; 861 boolean first_read; 862 { 863 #ifdef SCSIDEBUG 864 struct scsipi_link *sc_link = st->sc_link; 865 #endif 866 867 SC_DEBUG(sc_link, SDEV_DB2, ("starting block mode decision\n")); 868 869 /* 870 * If the drive can only handle fixed-length blocks and only at 871 * one size, perhaps we should just do that. 872 */ 873 if (st->blkmin && (st->blkmin == st->blkmax)) { 874 st->flags |= ST_FIXEDBLOCKS; 875 st->blksize = st->blkmin; 876 SC_DEBUG(sc_link, SDEV_DB3, 877 ("blkmin == blkmax of %d\n", st->blkmin)); 878 goto done; 879 } 880 /* 881 * If the tape density mandates (or even suggests) use of fixed 882 * or variable-length blocks, comply. 883 */ 884 switch (st->density) { 885 case HALFINCH_800: 886 case HALFINCH_1600: 887 case HALFINCH_6250: 888 case DDS: 889 st->flags &= ~ST_FIXEDBLOCKS; 890 st->blksize = 0; 891 SC_DEBUG(sc_link, SDEV_DB3, ("density specified variable\n")); 892 goto done; 893 case QIC_11: 894 case QIC_24: 895 case QIC_120: 896 case QIC_150: 897 case QIC_525: 898 case QIC_1320: 899 st->flags |= ST_FIXEDBLOCKS; 900 if (st->media_blksize > 0) 901 st->blksize = st->media_blksize; 902 else 903 st->blksize = DEF_FIXED_BSIZE; 904 SC_DEBUG(sc_link, SDEV_DB3, ("density specified fixed\n")); 905 goto done; 906 } 907 /* 908 * If we're about to read the tape, perhaps we should choose 909 * fixed or variable-length blocks and block size according to 910 * what the drive found on the tape. 911 */ 912 if (first_read && 913 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 914 (st->media_blksize == DEF_FIXED_BSIZE) || 915 (st->media_blksize == 1024))) { 916 if (st->media_blksize > 0) 917 st->flags |= ST_FIXEDBLOCKS; 918 else 919 st->flags &= ~ST_FIXEDBLOCKS; 920 st->blksize = st->media_blksize; 921 SC_DEBUG(sc_link, SDEV_DB3, 922 ("Used media_blksize of %d\n", st->media_blksize)); 923 goto done; 924 } 925 /* 926 * We're getting no hints from any direction. Choose variable- 927 * length blocks arbitrarily. 928 */ 929 st->flags &= ~ST_FIXEDBLOCKS; 930 st->blksize = 0; 931 SC_DEBUG(sc_link, SDEV_DB3, 932 ("Give up and default to variable mode\n")); 933 934 done: 935 /* 936 * Decide whether or not to write two file marks to signify end- 937 * of-data. Make the decision as a function of density. If 938 * the decision is not to use a second file mark, the SCSI BLANK 939 * CHECK condition code will be recognized as end-of-data when 940 * first read. 941 * (I think this should be a by-product of fixed/variable..julian) 942 */ 943 switch (st->density) { 944 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 945 case QIC_11: 946 case QIC_24: 947 case QIC_120: 948 case QIC_150: 949 case QIC_525: 950 case QIC_1320: 951 st->flags &= ~ST_2FM_AT_EOD; 952 break; 953 default: 954 st->flags |= ST_2FM_AT_EOD; 955 } 956 return (0); 957 } 958 959 /* 960 * Actually translate the requested transfer into 961 * one the physical driver can understand 962 * The transfer is described by a buf and will include 963 * only one physical transfer. 964 */ 965 void 966 ststrategy(bp) 967 struct buf *bp; 968 { 969 struct st_softc *st = st_cd.cd_devs[STUNIT(bp->b_dev)]; 970 struct buf *dp; 971 int s; 972 973 SC_DEBUG(st->sc_link, SDEV_DB1, 974 ("ststrategy %ld bytes @ blk %d\n", bp->b_bcount, bp->b_blkno)); 975 /* 976 * If it's a null transfer, return immediatly 977 */ 978 if (bp->b_bcount == 0) 979 goto done; 980 /* 981 * Odd sized request on fixed drives are verboten 982 */ 983 if (st->flags & ST_FIXEDBLOCKS) { 984 if (bp->b_bcount % st->blksize) { 985 printf("%s: bad request, must be multiple of %d\n", 986 st->sc_dev.dv_xname, st->blksize); 987 bp->b_error = EIO; 988 goto bad; 989 } 990 } 991 /* 992 * as are out-of-range requests on variable drives. 993 */ 994 else if (bp->b_bcount < st->blkmin || 995 (st->blkmax && bp->b_bcount > st->blkmax)) { 996 printf("%s: bad request, must be between %d and %d\n", 997 st->sc_dev.dv_xname, st->blkmin, st->blkmax); 998 bp->b_error = EIO; 999 goto bad; 1000 } 1001 s = splbio(); 1002 1003 /* 1004 * Place it in the queue of activities for this tape 1005 * at the end (a bit silly because we only have on user.. 1006 * (but it could fork())) 1007 */ 1008 dp = &st->buf_queue; 1009 bp->b_actf = NULL; 1010 bp->b_actb = dp->b_actb; 1011 *dp->b_actb = bp; 1012 dp->b_actb = &bp->b_actf; 1013 1014 /* 1015 * Tell the device to get going on the transfer if it's 1016 * not doing anything, otherwise just wait for completion 1017 * (All a bit silly if we're only allowing 1 open but..) 1018 */ 1019 ststart(st); 1020 1021 splx(s); 1022 return; 1023 bad: 1024 bp->b_flags |= B_ERROR; 1025 done: 1026 /* 1027 * Correctly set the buf to indicate a completed xfer 1028 */ 1029 bp->b_resid = bp->b_bcount; 1030 biodone(bp); 1031 return; 1032 } 1033 1034 /* 1035 * ststart looks to see if there is a buf waiting for the device 1036 * and that the device is not already busy. If both are true, 1037 * It dequeues the buf and creates a scsi command to perform the 1038 * transfer required. The transfer request will call scsipi_done 1039 * on completion, which will in turn call this routine again 1040 * so that the next queued transfer is performed. 1041 * The bufs are queued by the strategy routine (ststrategy) 1042 * 1043 * This routine is also called after other non-queued requests 1044 * have been made of the scsi driver, to ensure that the queue 1045 * continues to be drained. 1046 * ststart() is called at splbio 1047 */ 1048 void 1049 ststart(v) 1050 void *v; 1051 { 1052 struct st_softc *st = v; 1053 struct scsipi_link *sc_link = st->sc_link; 1054 register struct buf *bp, *dp; 1055 struct scsi_rw_tape cmd; 1056 int flags; 1057 1058 SC_DEBUG(sc_link, SDEV_DB2, ("ststart ")); 1059 /* 1060 * See if there is a buf to do and we are not already 1061 * doing one 1062 */ 1063 while (sc_link->openings > 0) { 1064 /* if a special awaits, let it proceed first */ 1065 if (sc_link->flags & SDEV_WAITING) { 1066 sc_link->flags &= ~SDEV_WAITING; 1067 wakeup((caddr_t)sc_link); 1068 return; 1069 } 1070 1071 dp = &st->buf_queue; 1072 if ((bp = dp->b_actf) == NULL) 1073 return; 1074 if ((dp = bp->b_actf) != NULL) 1075 dp->b_actb = bp->b_actb; 1076 else 1077 st->buf_queue.b_actb = bp->b_actb; 1078 *bp->b_actb = dp; 1079 1080 /* 1081 * if the device has been unmounted byt the user 1082 * then throw away all requests until done 1083 */ 1084 if (!(st->flags & ST_MOUNTED) || 1085 !(sc_link->flags & SDEV_MEDIA_LOADED)) { 1086 /* make sure that one implies the other.. */ 1087 sc_link->flags &= ~SDEV_MEDIA_LOADED; 1088 bp->b_flags |= B_ERROR; 1089 bp->b_error = EIO; 1090 bp->b_resid = bp->b_bcount; 1091 biodone(bp); 1092 continue; 1093 } 1094 /* 1095 * only FIXEDBLOCK devices have pending I/O or space operations. 1096 */ 1097 if (st->flags & ST_FIXEDBLOCKS) { 1098 /* 1099 * If we are at a filemark but have not reported it yet 1100 * then we should report it now 1101 */ 1102 if (st->flags & ST_AT_FILEMARK) { 1103 if ((bp->b_flags & B_READ) == B_WRITE) { 1104 /* 1105 * Handling of ST_AT_FILEMARK in 1106 * st_space will fill in the right file 1107 * mark count. 1108 * Back up over filemark 1109 */ 1110 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1111 bp->b_flags |= B_ERROR; 1112 bp->b_error = EIO; 1113 biodone(bp); 1114 continue; 1115 } 1116 } else { 1117 bp->b_resid = bp->b_bcount; 1118 bp->b_error = 0; 1119 bp->b_flags &= ~B_ERROR; 1120 st->flags &= ~ST_AT_FILEMARK; 1121 biodone(bp); 1122 continue; /* seek more work */ 1123 } 1124 } 1125 } 1126 /* 1127 * If we are at EOM but have not reported it 1128 * yet then we should report it now. 1129 */ 1130 if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { 1131 bp->b_resid = bp->b_bcount; 1132 if (st->flags & ST_EIO_PENDING) { 1133 bp->b_error = EIO; 1134 bp->b_flags |= B_ERROR; 1135 } 1136 st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); 1137 biodone(bp); 1138 continue; /* seek more work */ 1139 } 1140 1141 /* 1142 * Fill out the scsi command 1143 */ 1144 bzero(&cmd, sizeof(cmd)); 1145 if ((bp->b_flags & B_READ) == B_WRITE) { 1146 cmd.opcode = WRITE; 1147 st->flags &= ~ST_FM_WRITTEN; 1148 flags = SCSI_DATA_OUT; 1149 } else { 1150 cmd.opcode = READ; 1151 flags = SCSI_DATA_IN; 1152 } 1153 1154 /* 1155 * Handle "fixed-block-mode" tape drives by using the 1156 * block count instead of the length. 1157 */ 1158 if (st->flags & ST_FIXEDBLOCKS) { 1159 cmd.byte2 |= SRW_FIXED; 1160 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1161 } else 1162 _lto3b(bp->b_bcount, cmd.len); 1163 1164 /* 1165 * go ask the adapter to do all this for us 1166 */ 1167 if (scsipi_command(sc_link, 1168 (struct scsipi_generic *)&cmd, sizeof(cmd), 1169 (u_char *)bp->b_data, bp->b_bcount, 1170 0, ST_IO_TIME, bp, flags | SCSI_NOSLEEP)) 1171 printf("%s: not queued\n", st->sc_dev.dv_xname); 1172 } /* go back and see if we can cram more work in.. */ 1173 } 1174 1175 void 1176 stdone(xs) 1177 struct scsipi_xfer *xs; 1178 { 1179 1180 if (xs->bp != NULL) { 1181 struct st_softc *st = xs->sc_link->device_softc; 1182 if ((xs->bp->b_flags & B_READ) == B_WRITE) { 1183 st->flags |= ST_WRITTEN; 1184 } else { 1185 st->flags &= ~ST_WRITTEN; 1186 } 1187 #if NRND > 0 1188 rnd_add_uint32(&st->rnd_source, xs->bp->b_blkno); 1189 #endif 1190 } 1191 } 1192 1193 int 1194 stread(dev, uio, iomode) 1195 dev_t dev; 1196 struct uio *uio; 1197 int iomode; 1198 { 1199 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1200 1201 return (physio(ststrategy, NULL, dev, B_READ, 1202 st->sc_link->adapter->scsipi_minphys, uio)); 1203 } 1204 1205 int 1206 stwrite(dev, uio, iomode) 1207 dev_t dev; 1208 struct uio *uio; 1209 int iomode; 1210 { 1211 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1212 1213 return (physio(ststrategy, NULL, dev, B_WRITE, 1214 st->sc_link->adapter->scsipi_minphys, uio)); 1215 } 1216 1217 /* 1218 * Perform special action on behalf of the user; 1219 * knows about the internals of this device 1220 */ 1221 int 1222 stioctl(dev, cmd, arg, flag, p) 1223 dev_t dev; 1224 u_long cmd; 1225 caddr_t arg; 1226 int flag; 1227 struct proc *p; 1228 { 1229 int error = 0; 1230 int unit; 1231 int number, nmarks, dsty; 1232 int flags; 1233 struct st_softc *st; 1234 int hold_blksize; 1235 u_int8_t hold_density; 1236 struct mtop *mt = (struct mtop *) arg; 1237 1238 /* 1239 * Find the device that the user is talking about 1240 */ 1241 flags = 0; /* give error messages, act on errors etc. */ 1242 unit = STUNIT(dev); 1243 dsty = STDSTY(dev); 1244 st = st_cd.cd_devs[unit]; 1245 hold_blksize = st->blksize; 1246 hold_density = st->density; 1247 1248 switch ((u_int) cmd) { 1249 1250 case MTIOCGET: { 1251 struct mtget *g = (struct mtget *) arg; 1252 /* 1253 * (to get the current state of READONLY) 1254 */ 1255 error = st_mode_sense(st, SCSI_SILENT); 1256 if (error) 1257 break; 1258 SC_DEBUG(st->sc_link, SDEV_DB1, ("[ioctl: get status]\n")); 1259 bzero(g, sizeof(struct mtget)); 1260 g->mt_type = 0x7; /* Ultrix compat *//*? */ 1261 g->mt_blksiz = st->blksize; 1262 g->mt_density = st->density; 1263 g->mt_mblksiz[0] = st->modes[0].blksize; 1264 g->mt_mblksiz[1] = st->modes[1].blksize; 1265 g->mt_mblksiz[2] = st->modes[2].blksize; 1266 g->mt_mblksiz[3] = st->modes[3].blksize; 1267 g->mt_mdensity[0] = st->modes[0].density; 1268 g->mt_mdensity[1] = st->modes[1].density; 1269 g->mt_mdensity[2] = st->modes[2].density; 1270 g->mt_mdensity[3] = st->modes[3].density; 1271 if (st->flags & ST_READONLY) 1272 g->mt_dsreg |= MT_DS_RDONLY; 1273 if (st->flags & ST_MOUNTED) 1274 g->mt_dsreg |= MT_DS_MOUNTED; 1275 g->mt_resid = st->mt_resid; 1276 g->mt_erreg = st->mt_erreg; 1277 /* 1278 * clear latched errors. 1279 */ 1280 st->mt_resid = 0; 1281 st->mt_erreg = 0; 1282 break; 1283 } 1284 case MTIOCTOP: { 1285 1286 SC_DEBUG(st->sc_link, SDEV_DB1, 1287 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1288 mt->mt_count)); 1289 1290 /* compat: in U*x it is a short */ 1291 number = mt->mt_count; 1292 switch ((short) (mt->mt_op)) { 1293 case MTWEOF: /* write an end-of-file record */ 1294 error = st_write_filemarks(st, number, flags); 1295 break; 1296 case MTBSF: /* backward space file */ 1297 number = -number; 1298 case MTFSF: /* forward space file */ 1299 error = st_check_eod(st, FALSE, &nmarks, flags); 1300 if (!error) 1301 error = st_space(st, number - nmarks, 1302 SP_FILEMARKS, flags); 1303 break; 1304 case MTBSR: /* backward space record */ 1305 number = -number; 1306 case MTFSR: /* forward space record */ 1307 error = st_check_eod(st, TRUE, &nmarks, flags); 1308 if (!error) 1309 error = st_space(st, number, SP_BLKS, flags); 1310 break; 1311 case MTREW: /* rewind */ 1312 error = st_rewind(st, 0, flags); 1313 break; 1314 case MTOFFL: /* rewind and put the drive offline */ 1315 st_unmount(st, EJECT); 1316 break; 1317 case MTNOP: /* no operation, sets status only */ 1318 break; 1319 case MTRETEN: /* retension the tape */ 1320 error = st_load(st, LD_RETENSION, flags); 1321 if (!error) 1322 error = st_load(st, LD_LOAD, flags); 1323 break; 1324 case MTEOM: /* forward space to end of media */ 1325 error = st_check_eod(st, FALSE, &nmarks, flags); 1326 if (!error) 1327 error = st_space(st, 1, SP_EOM, flags); 1328 break; 1329 case MTCACHE: /* enable controller cache */ 1330 st->flags &= ~ST_DONTBUFFER; 1331 goto try_new_value; 1332 case MTNOCACHE: /* disable controller cache */ 1333 st->flags |= ST_DONTBUFFER; 1334 goto try_new_value; 1335 case MTERASE: /* erase volume */ 1336 error = st_erase(st, number, flags); 1337 break; 1338 case MTSETBSIZ: /* Set block size for device */ 1339 #ifdef NOTYET 1340 if (!(st->flags & ST_NEW_MOUNT)) { 1341 uprintf("re-mount tape before changing blocksize"); 1342 error = EINVAL; 1343 break; 1344 } 1345 #endif 1346 if (number == 0) 1347 st->flags &= ~ST_FIXEDBLOCKS; 1348 else { 1349 if ((st->blkmin || st->blkmax) && 1350 (number < st->blkmin || 1351 number > st->blkmax)) { 1352 error = EINVAL; 1353 break; 1354 } 1355 st->flags |= ST_FIXEDBLOCKS; 1356 } 1357 st->blksize = number; 1358 st->flags |= ST_BLOCK_SET; /*XXX */ 1359 goto try_new_value; 1360 1361 case MTSETDNSTY: /* Set density for device and mode */ 1362 /* 1363 * Any number >= 0 and <= 0xff is legal. Numbers 1364 * above 0x80 are 'vendor unique'. 1365 */ 1366 if (number < 0 || number > 255) { 1367 error = EINVAL; 1368 break; 1369 } else 1370 st->density = number; 1371 goto try_new_value; 1372 1373 case MTCMPRESS: 1374 error = st_cmprss(st, number); 1375 break; 1376 1377 case MTEWARN: 1378 if (number) 1379 st->flags |= ST_EARLYWARN; 1380 else 1381 st->flags &= ~ST_EARLYWARN; 1382 break; 1383 1384 default: 1385 error = EINVAL; 1386 } 1387 break; 1388 } 1389 case MTIOCIEOT: 1390 case MTIOCEEOT: 1391 break; 1392 1393 case MTIOCRDSPOS: 1394 error = st_rdpos(st, 0, (u_int32_t *) arg); 1395 break; 1396 1397 case MTIOCRDHPOS: 1398 error = st_rdpos(st, 1, (u_int32_t *) arg); 1399 break; 1400 1401 case MTIOCSLOCATE: 1402 error = st_setpos(st, 0, (u_int32_t *) arg); 1403 break; 1404 1405 case MTIOCHLOCATE: 1406 error = st_setpos(st, 1, (u_int32_t *) arg); 1407 break; 1408 1409 1410 default: 1411 error = scsipi_do_ioctl(st->sc_link, dev, cmd, arg, 1412 flag, p); 1413 break; 1414 } 1415 return (error); 1416 /*-----------------------------*/ 1417 try_new_value: 1418 /* 1419 * Check that the mode being asked for is aggreeable to the 1420 * drive. If not, put it back the way it was. 1421 */ 1422 if ((error = st_mode_select(st, 0)) != 0) {/* put it back as it was */ 1423 printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); 1424 st->density = hold_density; 1425 st->blksize = hold_blksize; 1426 if (st->blksize) 1427 st->flags |= ST_FIXEDBLOCKS; 1428 else 1429 st->flags &= ~ST_FIXEDBLOCKS; 1430 return (error); 1431 } 1432 /* 1433 * As the drive liked it, if we are setting a new default, 1434 * set it into the structures as such. 1435 * 1436 * The means for deciding this are not finalised yet- but 1437 * if the device was opened in Control Mode, the values 1438 * are persistent now across mounts. 1439 */ 1440 if (STMODE(dev) == CTRL_MODE) { 1441 switch ((short) (mt->mt_op)) { 1442 case MTSETBSIZ: 1443 st->modes[dsty].blksize = st->blksize; 1444 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1445 break; 1446 case MTSETDNSTY: 1447 st->modes[dsty].density = st->density; 1448 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1449 break; 1450 } 1451 } 1452 return (0); 1453 } 1454 1455 /* 1456 * Do a synchronous read. 1457 */ 1458 int 1459 st_read(st, buf, size, flags) 1460 struct st_softc *st; 1461 int size; 1462 int flags; 1463 char *buf; 1464 { 1465 struct scsi_rw_tape cmd; 1466 1467 /* 1468 * If it's a null transfer, return immediatly 1469 */ 1470 if (size == 0) 1471 return (0); 1472 bzero(&cmd, sizeof(cmd)); 1473 cmd.opcode = READ; 1474 if (st->flags & ST_FIXEDBLOCKS) { 1475 cmd.byte2 |= SRW_FIXED; 1476 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1477 cmd.len); 1478 } else 1479 _lto3b(size, cmd.len); 1480 return (scsipi_command(st->sc_link, 1481 (struct scsipi_generic *)&cmd, sizeof(cmd), 1482 (u_char *)buf, size, 0, ST_IO_TIME, NULL, flags | SCSI_DATA_IN)); 1483 } 1484 1485 /* 1486 * Ask the drive what it's min and max blk sizes are. 1487 */ 1488 int 1489 st_read_block_limits(st, flags) 1490 struct st_softc *st; 1491 int flags; 1492 { 1493 struct scsi_block_limits cmd; 1494 struct scsi_block_limits_data block_limits; 1495 struct scsipi_link *sc_link = st->sc_link; 1496 int error; 1497 1498 /* 1499 * First check if we have it all loaded 1500 */ 1501 if ((sc_link->flags & SDEV_MEDIA_LOADED)) 1502 return (0); 1503 1504 /* 1505 * do a 'Read Block Limits' 1506 */ 1507 bzero(&cmd, sizeof(cmd)); 1508 cmd.opcode = READ_BLOCK_LIMITS; 1509 1510 /* 1511 * do the command, update the global values 1512 */ 1513 error = scsipi_command(sc_link, (struct scsipi_generic *)&cmd, 1514 sizeof(cmd), (u_char *)&block_limits, sizeof(block_limits), 1515 ST_RETRIES, ST_CTL_TIME, NULL, flags | SCSI_DATA_IN); 1516 if (error) 1517 return (error); 1518 1519 st->blkmin = _2btol(block_limits.min_length); 1520 st->blkmax = _3btol(block_limits.max_length); 1521 1522 SC_DEBUG(sc_link, SDEV_DB3, 1523 ("(%d <= blksize <= %d)\n", st->blkmin, st->blkmax)); 1524 return (0); 1525 } 1526 1527 /* 1528 * Get the scsi driver to send a full inquiry to the 1529 * device and use the results to fill out the global 1530 * parameter structure. 1531 * 1532 * called from: 1533 * attach 1534 * open 1535 * ioctl (to reset original blksize) 1536 */ 1537 int 1538 st_mode_sense(st, flags) 1539 struct st_softc *st; 1540 int flags; 1541 { 1542 u_int scsipi_sense_len; 1543 int error; 1544 struct scsi_mode_sense cmd; 1545 struct scsipi_sense { 1546 struct scsi_mode_header header; 1547 struct scsi_blk_desc blk_desc; 1548 u_char sense_data[MAX_PAGE_0_SIZE]; 1549 } scsipi_sense; 1550 struct scsipi_link *sc_link = st->sc_link; 1551 1552 scsipi_sense_len = 12 + st->page_0_size; 1553 1554 /* 1555 * Set up a mode sense 1556 */ 1557 bzero(&cmd, sizeof(cmd)); 1558 cmd.opcode = SCSI_MODE_SENSE; 1559 cmd.length = scsipi_sense_len; 1560 1561 /* 1562 * do the command, but we don't need the results 1563 * just print them for our interest's sake, if asked, 1564 * or if we need it as a template for the mode select 1565 * store it away. 1566 */ 1567 error = scsipi_command(sc_link, (struct scsipi_generic *)&cmd, 1568 sizeof(cmd), (u_char *)&scsipi_sense, scsipi_sense_len, 1569 ST_RETRIES, ST_CTL_TIME, NULL, flags | SCSI_DATA_IN); 1570 if (error) 1571 return (error); 1572 1573 st->numblks = _3btol(scsipi_sense.blk_desc.nblocks); 1574 st->media_blksize = _3btol(scsipi_sense.blk_desc.blklen); 1575 st->media_density = scsipi_sense.blk_desc.density; 1576 if (scsipi_sense.header.dev_spec & SMH_DSP_WRITE_PROT) 1577 st->flags |= ST_READONLY; 1578 else 1579 st->flags &= ~ST_READONLY; 1580 SC_DEBUG(sc_link, SDEV_DB3, 1581 ("density code 0x%x, %d-byte blocks, write-%s, ", 1582 st->media_density, st->media_blksize, 1583 st->flags & ST_READONLY ? "protected" : "enabled")); 1584 SC_DEBUG(sc_link, SDEV_DB3, 1585 ("%sbuffered\n", 1586 scsipi_sense.header.dev_spec & SMH_DSP_BUFF_MODE ? "" : "un")); 1587 if (st->page_0_size) 1588 bcopy(scsipi_sense.sense_data, st->sense_data, 1589 st->page_0_size); 1590 sc_link->flags |= SDEV_MEDIA_LOADED; 1591 return (0); 1592 } 1593 1594 /* 1595 * Send a filled out parameter structure to the drive to 1596 * set it into the desire modes etc. 1597 */ 1598 int 1599 st_mode_select(st, flags) 1600 struct st_softc *st; 1601 int flags; 1602 { 1603 u_int scsi_select_len; 1604 struct scsi_mode_select cmd; 1605 struct scsi_select { 1606 struct scsi_mode_header header; 1607 struct scsi_blk_desc blk_desc; 1608 u_char sense_data[MAX_PAGE_0_SIZE]; 1609 } scsi_select; 1610 struct scsipi_link *sc_link = st->sc_link; 1611 1612 scsi_select_len = 12 + st->page_0_size; 1613 1614 /* 1615 * This quirk deals with drives that have only one valid mode 1616 * and think this gives them license to reject all mode selects, 1617 * even if the selected mode is the one that is supported. 1618 */ 1619 if (st->quirks & ST_Q_UNIMODAL) { 1620 SC_DEBUG(sc_link, SDEV_DB3, 1621 ("not setting density 0x%x blksize 0x%x\n", 1622 st->density, st->blksize)); 1623 return (0); 1624 } 1625 1626 /* 1627 * Set up for a mode select 1628 */ 1629 bzero(&cmd, sizeof(cmd)); 1630 cmd.opcode = SCSI_MODE_SELECT; 1631 cmd.length = scsi_select_len; 1632 1633 bzero(&scsi_select, scsi_select_len); 1634 scsi_select.header.blk_desc_len = sizeof(struct scsi_blk_desc); 1635 scsi_select.header.dev_spec &= ~SMH_DSP_BUFF_MODE; 1636 scsi_select.blk_desc.density = st->density; 1637 if (st->flags & ST_DONTBUFFER) 1638 scsi_select.header.dev_spec |= SMH_DSP_BUFF_MODE_OFF; 1639 else 1640 scsi_select.header.dev_spec |= SMH_DSP_BUFF_MODE_ON; 1641 if (st->flags & ST_FIXEDBLOCKS) 1642 _lto3b(st->blksize, scsi_select.blk_desc.blklen); 1643 if (st->page_0_size) 1644 bcopy(st->sense_data, scsi_select.sense_data, st->page_0_size); 1645 1646 /* 1647 * do the command 1648 */ 1649 return (scsipi_command(sc_link, (struct scsipi_generic *)&cmd, 1650 sizeof(cmd), (u_char *)&scsi_select, scsi_select_len, 1651 ST_RETRIES, ST_CTL_TIME, NULL, flags | SCSI_DATA_OUT)); 1652 } 1653 1654 int 1655 st_cmprss(st, onoff) 1656 struct st_softc *st; 1657 int onoff; 1658 { 1659 u_int scsi_dlen; 1660 struct scsi_mode_select mcmd; 1661 struct scsi_mode_sense scmd; 1662 struct scsi_select { 1663 struct scsi_mode_header header; 1664 struct scsi_blk_desc blk_desc; 1665 u_char pdata[max(sizeof(struct scsi_tape_dev_conf_page), 1666 sizeof(struct scsi_tape_dev_compression_page))]; 1667 } scsi_pdata; 1668 struct scsi_tape_dev_conf_page *ptr; 1669 struct scsi_tape_dev_compression_page *cptr; 1670 struct scsipi_link *sc_link = st->sc_link; 1671 int error, ison, flags; 1672 1673 scsi_dlen = sizeof(scsi_pdata); 1674 bzero(&scsi_pdata, scsi_dlen); 1675 1676 /* 1677 * Set up for a mode sense. 1678 * Do DATA COMPRESSION page first. 1679 */ 1680 bzero(&scmd, sizeof(scmd)); 1681 scmd.opcode = SCSI_MODE_SENSE; 1682 scmd.page = SMS_PAGE_CTRL_CURRENT | 0xf; 1683 scmd.length = scsi_dlen; 1684 1685 flags = SCSI_SILENT; 1686 1687 /* 1688 * Do the MODE SENSE command... 1689 */ 1690 again: 1691 bzero(&scsi_pdata, scsi_dlen); 1692 error = scsipi_command(sc_link, 1693 (struct scsipi_generic *)&scmd, sizeof(scmd), 1694 (u_char *)&scsi_pdata, scsi_dlen, 1695 ST_RETRIES, ST_CTL_TIME, NULL, flags | SCSI_DATA_IN); 1696 1697 if (error) { 1698 if (scmd.byte2 != SMS_DBD) { 1699 scmd.byte2 = SMS_DBD; 1700 goto again; 1701 } 1702 /* 1703 * Try a different page? 1704 */ 1705 if (scmd.page == (SMS_PAGE_CTRL_CURRENT | 0xf)) { 1706 scmd.page = SMS_PAGE_CTRL_CURRENT | 0x10; 1707 scmd.byte2 = 0; 1708 goto again; 1709 } 1710 return (error); 1711 } 1712 1713 if (scsi_pdata.header.blk_desc_len) 1714 ptr = (struct scsi_tape_dev_conf_page *) scsi_pdata.pdata; 1715 else 1716 ptr = (struct scsi_tape_dev_conf_page *) &scsi_pdata.blk_desc; 1717 1718 if ((scmd.page & SMS_PAGE_CODE) == 0xf) { 1719 cptr = (struct scsi_tape_dev_compression_page *) ptr; 1720 ison = (cptr->dce_dcc & DCP_DCE) != 0; 1721 if (onoff) 1722 cptr->dce_dcc |= DCP_DCE; 1723 else 1724 cptr->dce_dcc &= ~DCP_DCE; 1725 cptr->pagecode &= ~0x80; 1726 } else { 1727 ison = (ptr->sel_comp_alg != 0); 1728 if (onoff) 1729 ptr->sel_comp_alg = 1; 1730 else 1731 ptr->sel_comp_alg = 0; 1732 ptr->pagecode &= ~0x80; 1733 ptr->byte2 = 0; 1734 ptr->active_partition = 0; 1735 ptr->wb_full_ratio = 0; 1736 ptr->rb_empty_ratio = 0; 1737 ptr->byte8 &= ~0x30; 1738 ptr->gap_size = 0; 1739 ptr->byte10 &= ~0xe7; 1740 ptr->ew_bufsize[0] = 0; 1741 ptr->ew_bufsize[1] = 0; 1742 ptr->ew_bufsize[2] = 0; 1743 ptr->reserved = 0; 1744 } 1745 onoff = onoff ? 1 : 0; 1746 /* 1747 * There might be a virtue in actually doing the MODE SELECTS, 1748 * but let's not clog the bus over it. 1749 */ 1750 if (onoff == ison) 1751 return (0); 1752 1753 /* 1754 * Set up for a mode select 1755 */ 1756 1757 scsi_pdata.header.data_length = 0; 1758 scsi_pdata.header.medium_type = 0; 1759 if ((st->flags & ST_DONTBUFFER) == 0) 1760 scsi_pdata.header.dev_spec = SMH_DSP_BUFF_MODE_ON; 1761 else 1762 scsi_pdata.header.dev_spec = 0; 1763 1764 bzero(&mcmd, sizeof(mcmd)); 1765 mcmd.opcode = SCSI_MODE_SELECT; 1766 mcmd.byte2 = SMS_PF; 1767 mcmd.length = scsi_dlen; 1768 if (scsi_pdata.header.blk_desc_len) { 1769 scsi_pdata.blk_desc.density = 0; 1770 scsi_pdata.blk_desc.nblocks[0] = 0; 1771 scsi_pdata.blk_desc.nblocks[1] = 0; 1772 scsi_pdata.blk_desc.nblocks[2] = 0; 1773 } 1774 1775 /* 1776 * Do the command 1777 */ 1778 error = scsipi_command(sc_link, 1779 (struct scsipi_generic *)&mcmd, sizeof(mcmd), 1780 (u_char *)&scsi_pdata, scsi_dlen, 1781 ST_RETRIES, ST_CTL_TIME, NULL, flags | SCSI_DATA_OUT); 1782 1783 if (error && (scmd.page & SMS_PAGE_CODE) == 0xf) { 1784 /* 1785 * Try DEVICE CONFIGURATION page. 1786 */ 1787 scmd.page = SMS_PAGE_CTRL_CURRENT | 0x10; 1788 goto again; 1789 } 1790 return (error); 1791 } 1792 /* 1793 * issue an erase command 1794 */ 1795 int 1796 st_erase(st, full, flags) 1797 struct st_softc *st; 1798 int full, flags; 1799 { 1800 int tmo; 1801 struct scsi_erase cmd; 1802 1803 /* 1804 * Full erase means set LONG bit in erase command, which asks 1805 * the drive to erase the entire unit. Without this bit, we're 1806 * asking the drive to write an erase gap. 1807 */ 1808 bzero(&cmd, sizeof(cmd)); 1809 cmd.opcode = ERASE; 1810 if (full) { 1811 cmd.byte2 = SE_IMMED|SE_LONG; 1812 tmo = ST_SPC_TIME; 1813 } else { 1814 tmo = ST_IO_TIME; 1815 cmd.byte2 = SE_IMMED; 1816 } 1817 1818 /* 1819 * XXX We always do this asynchronously, for now. How long should 1820 * we wait if we want to (eventually) to it synchronously? 1821 */ 1822 return (scsipi_command(st->sc_link, 1823 (struct scsipi_generic *)&cmd, sizeof(cmd), 1824 0, 0, ST_RETRIES, tmo, NULL, flags)); 1825 } 1826 1827 /* 1828 * skip N blocks/filemarks/seq filemarks/eom 1829 */ 1830 int 1831 st_space(st, number, what, flags) 1832 struct st_softc *st; 1833 u_int what; 1834 int flags; 1835 int number; 1836 { 1837 struct scsi_space cmd; 1838 int error; 1839 1840 switch (what) { 1841 case SP_BLKS: 1842 if (st->flags & ST_PER_ACTION) { 1843 if (number > 0) { 1844 st->flags &= ~ST_PER_ACTION; 1845 return (EIO); 1846 } else if (number < 0) { 1847 if (st->flags & ST_AT_FILEMARK) { 1848 /* 1849 * Handling of ST_AT_FILEMARK 1850 * in st_space will fill in the 1851 * right file mark count. 1852 */ 1853 error = st_space(st, 0, SP_FILEMARKS, 1854 flags); 1855 if (error) 1856 return (error); 1857 } 1858 if (st->flags & ST_BLANK_READ) { 1859 st->flags &= ~ST_BLANK_READ; 1860 return (EIO); 1861 } 1862 st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); 1863 } 1864 } 1865 break; 1866 case SP_FILEMARKS: 1867 if (st->flags & ST_EIO_PENDING) { 1868 if (number > 0) { 1869 /* pretend we just discovered the error */ 1870 st->flags &= ~ST_EIO_PENDING; 1871 return (EIO); 1872 } else if (number < 0) { 1873 /* back away from the error */ 1874 st->flags &= ~ST_EIO_PENDING; 1875 } 1876 } 1877 if (st->flags & ST_AT_FILEMARK) { 1878 st->flags &= ~ST_AT_FILEMARK; 1879 number--; 1880 } 1881 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 1882 /* back away from unwritten tape */ 1883 st->flags &= ~ST_BLANK_READ; 1884 number++; /* XXX dubious */ 1885 } 1886 break; 1887 case SP_EOM: 1888 if (st->flags & ST_EOM_PENDING) { 1889 /* we're already there */ 1890 st->flags &= ~ST_EOM_PENDING; 1891 return (0); 1892 } 1893 if (st->flags & ST_EIO_PENDING) { 1894 /* pretend we just discovered the error */ 1895 st->flags &= ~ST_EIO_PENDING; 1896 return (EIO); 1897 } 1898 if (st->flags & ST_AT_FILEMARK) 1899 st->flags &= ~ST_AT_FILEMARK; 1900 break; 1901 } 1902 if (number == 0) 1903 return (0); 1904 1905 bzero(&cmd, sizeof(cmd)); 1906 cmd.opcode = SPACE; 1907 cmd.byte2 = what; 1908 _lto3b(number, cmd.number); 1909 1910 return (scsipi_command(st->sc_link, 1911 (struct scsipi_generic *)&cmd, sizeof(cmd), 1912 0, 0, 0, ST_SPC_TIME, NULL, flags)); 1913 } 1914 1915 /* 1916 * write N filemarks 1917 */ 1918 int 1919 st_write_filemarks(st, number, flags) 1920 struct st_softc *st; 1921 int flags; 1922 int number; 1923 { 1924 struct scsi_write_filemarks cmd; 1925 1926 /* 1927 * It's hard to write a negative number of file marks. 1928 * Don't try. 1929 */ 1930 if (number < 0) 1931 return (EINVAL); 1932 switch (number) { 1933 case 0: /* really a command to sync the drive's buffers */ 1934 break; 1935 case 1: 1936 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 1937 st->flags &= ~ST_WRITTEN; 1938 else 1939 st->flags |= ST_FM_WRITTEN; 1940 st->flags &= ~ST_PER_ACTION; 1941 break; 1942 default: 1943 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 1944 } 1945 1946 bzero(&cmd, sizeof(cmd)); 1947 cmd.opcode = WRITE_FILEMARKS; 1948 _lto3b(number, cmd.number); 1949 1950 return (scsipi_command(st->sc_link, 1951 (struct scsipi_generic *)&cmd, sizeof(cmd), 1952 0, 0, 0, ST_IO_TIME * 4, NULL, flags)); 1953 } 1954 1955 /* 1956 * Make sure the right number of file marks is on tape if the 1957 * tape has been written. If the position argument is true, 1958 * leave the tape positioned where it was originally. 1959 * 1960 * nmarks returns the number of marks to skip (or, if position 1961 * true, which were skipped) to get back original position. 1962 */ 1963 int 1964 st_check_eod(st, position, nmarks, flags) 1965 struct st_softc *st; 1966 boolean position; 1967 int *nmarks; 1968 int flags; 1969 { 1970 int error; 1971 1972 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 1973 default: 1974 *nmarks = 0; 1975 return (0); 1976 case ST_WRITTEN: 1977 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 1978 *nmarks = 1; 1979 break; 1980 case ST_WRITTEN | ST_2FM_AT_EOD: 1981 *nmarks = 2; 1982 } 1983 error = st_write_filemarks(st, *nmarks, flags); 1984 if (position && !error) 1985 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 1986 return (error); 1987 } 1988 1989 /* 1990 * load/unload/retension 1991 */ 1992 int 1993 st_load(st, type, flags) 1994 struct st_softc *st; 1995 u_int type; 1996 int flags; 1997 { 1998 struct scsi_load cmd; 1999 2000 if (type != LD_LOAD) { 2001 int error; 2002 int nmarks; 2003 2004 error = st_check_eod(st, FALSE, &nmarks, flags); 2005 if (error) 2006 return (error); 2007 } 2008 if (st->quirks & ST_Q_IGNORE_LOADS) { 2009 if (type == LD_LOAD) { 2010 /* 2011 * If we ignore loads, at least we should try a rewind. 2012 */ 2013 return st_rewind(st, 0, flags); 2014 } 2015 return (0); 2016 } 2017 2018 bzero(&cmd, sizeof(cmd)); 2019 cmd.opcode = LOAD; 2020 cmd.how = type; 2021 2022 return (scsipi_command(st->sc_link, 2023 (struct scsipi_generic *)&cmd, sizeof(cmd), 2024 0, 0, ST_RETRIES, ST_SPC_TIME, NULL, flags)); 2025 } 2026 2027 /* 2028 * Rewind the device 2029 */ 2030 int 2031 st_rewind(st, immediate, flags) 2032 struct st_softc *st; 2033 u_int immediate; 2034 int flags; 2035 { 2036 struct scsi_rewind cmd; 2037 int error; 2038 int nmarks; 2039 2040 error = st_check_eod(st, FALSE, &nmarks, flags); 2041 if (error) 2042 return (error); 2043 st->flags &= ~ST_PER_ACTION; 2044 2045 bzero(&cmd, sizeof(cmd)); 2046 cmd.opcode = REWIND; 2047 cmd.byte2 = immediate; 2048 2049 return (scsipi_command(st->sc_link, 2050 (struct scsipi_generic *)&cmd, sizeof(cmd), 0, 0, ST_RETRIES, 2051 immediate ? ST_CTL_TIME: ST_SPC_TIME, NULL, flags)); 2052 } 2053 2054 int 2055 st_rdpos(st, hard, blkptr) 2056 struct st_softc *st; 2057 int hard; 2058 u_int32_t *blkptr; 2059 { 2060 int error; 2061 u_int8_t posdata[20]; 2062 struct scsi_tape_read_position cmd; 2063 2064 /* 2065 * First flush any pending writes... 2066 */ 2067 error = st_write_filemarks(st, 0, SCSI_SILENT); 2068 2069 /* 2070 * The latter case is for 'write protected' tapes 2071 * which are too stupid to recognize a zero count 2072 * for writing filemarks as a no-op. 2073 */ 2074 if (error != 0 && error != EACCES) 2075 return (error); 2076 2077 bzero(&cmd, sizeof(cmd)); 2078 bzero(&posdata, sizeof(posdata)); 2079 cmd.opcode = READ_POSITION; 2080 if (hard) 2081 cmd.byte1 = 1; 2082 2083 error = scsipi_command(st->sc_link, 2084 (struct scsipi_generic *)&cmd, sizeof(cmd), (u_char *)&posdata, 2085 sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, 2086 SCSI_SILENT | SCSI_DATA_IN); 2087 2088 if (error == 0) { 2089 #if 0 2090 printf("posdata:"); 2091 for (hard = 0; hard < sizeof(posdata); hard++) 2092 printf("%02x ", posdata[hard] & 0xff); 2093 printf("\n"); 2094 #endif 2095 if (posdata[0] & 0x4) /* Block Position Unknown */ 2096 error = EINVAL; 2097 else 2098 *blkptr = _4btol(&posdata[4]); 2099 } 2100 return (error); 2101 } 2102 2103 int 2104 st_setpos(st, hard, blkptr) 2105 struct st_softc *st; 2106 int hard; 2107 u_int32_t *blkptr; 2108 { 2109 int error; 2110 struct scsi_tape_locate cmd; 2111 2112 /* 2113 * First flush any pending writes. Strictly speaking, 2114 * we're not supposed to have to worry about this, 2115 * but let's be untrusting. 2116 */ 2117 error = st_write_filemarks(st, 0, SCSI_SILENT); 2118 2119 /* 2120 * The latter case is for 'write protected' tapes 2121 * which are too stupid to recognize a zero count 2122 * for writing filemarks as a no-op. 2123 */ 2124 if (error != 0 && error != EACCES) 2125 return (error); 2126 2127 bzero(&cmd, sizeof(cmd)); 2128 cmd.opcode = LOCATE; 2129 if (hard) 2130 cmd.byte2 = 1 << 2; 2131 _lto4b(*blkptr, cmd.blkaddr); 2132 error = scsipi_command(st->sc_link, 2133 (struct scsipi_generic *)&cmd, sizeof(cmd), 2134 NULL, 0, ST_RETRIES, ST_SPC_TIME, NULL, 0); 2135 /* 2136 * XXX: Note file && block number position now unknown (if 2137 * XXX: these things ever start being maintained in this driver) 2138 */ 2139 return (error); 2140 } 2141 2142 2143 /* 2144 * Look at the returned sense and act on the error and determine 2145 * the unix error number to pass back..., 0 (== report no error), 2146 * -1 = retry the operation, -2 continue error processing. 2147 */ 2148 int 2149 st_interpret_sense(xs) 2150 struct scsipi_xfer *xs; 2151 { 2152 struct scsipi_link *sc_link = xs->sc_link; 2153 struct scsipi_sense_data *sense = &xs->sense.scsi_sense; 2154 struct buf *bp = xs->bp; 2155 struct st_softc *st = sc_link->device_softc; 2156 int retval = SCSIRET_CONTINUE; 2157 int doprint = ((xs->flags & SCSI_SILENT) == 0); 2158 u_int8_t key; 2159 int32_t info; 2160 2161 /* 2162 * If it isn't a extended or extended/deferred error, let 2163 * the generic code handle it. 2164 */ 2165 if ((sense->error_code & SSD_ERRCODE) != 0x70 && 2166 (sense->error_code & SSD_ERRCODE) != 0x71) { /* DEFFERRED */ 2167 return (retval); 2168 } 2169 2170 if (sense->error_code & SSD_ERRCODE_VALID) 2171 info = _4btol(sense->info); 2172 else 2173 info = xs->datalen; /* bad choice if fixed blocks */ 2174 key = sense->flags & SSD_KEY; 2175 st->mt_erreg = key; 2176 st->mt_resid = (short) info; 2177 2178 /* 2179 * If the device is not open yet, let generic handle 2180 */ 2181 if ((sc_link->flags & SDEV_OPEN) == 0) { 2182 return (retval); 2183 } 2184 2185 2186 if (st->flags & ST_FIXEDBLOCKS) { 2187 xs->resid = info * st->blksize; 2188 if (sense->flags & SSD_EOM) { 2189 if ((st->flags & ST_EARLYWARN) == 0) 2190 st->flags |= ST_EIO_PENDING; 2191 st->flags |= ST_EOM_PENDING; 2192 if (bp) 2193 bp->b_resid = xs->resid; 2194 } 2195 if (sense->flags & SSD_FILEMARK) { 2196 st->flags |= ST_AT_FILEMARK; 2197 if (bp) 2198 bp->b_resid = xs->resid; 2199 } 2200 if (sense->flags & SSD_ILI) { 2201 st->flags |= ST_EIO_PENDING; 2202 if (bp) 2203 bp->b_resid = xs->resid; 2204 if (sense->error_code & SSD_ERRCODE_VALID && 2205 (xs->flags & SCSI_SILENT) == 0) 2206 printf("%s: block wrong size, %d blocks " 2207 "residual\n", st->sc_dev.dv_xname, info); 2208 2209 /* 2210 * This quirk code helps the drive read 2211 * the first tape block, regardless of 2212 * format. That is required for these 2213 * drives to return proper MODE SENSE 2214 * information. 2215 */ 2216 if ((st->quirks & ST_Q_SENSE_HELP) && 2217 !(sc_link->flags & SDEV_MEDIA_LOADED)) 2218 st->blksize -= 512; 2219 } 2220 /* 2221 * If data wanted and no data was tranfered, do it immediatly 2222 */ 2223 if (xs->datalen && xs->resid >= xs->datalen) { 2224 if (st->flags & ST_EIO_PENDING) 2225 return (EIO); 2226 if (st->flags & ST_AT_FILEMARK) { 2227 if (bp) 2228 bp->b_resid = xs->resid; 2229 return (SCSIRET_NOERROR); 2230 } 2231 } 2232 } else { /* must be variable mode */ 2233 if (sense->flags & SSD_EOM) { 2234 /* 2235 * The current semantics of this 2236 * driver requires EOM detection 2237 * to return EIO unless early 2238 * warning detection is enabled 2239 * for variable mode (this is always 2240 * on for fixed block mode). 2241 */ 2242 if (st->flags & ST_EARLYWARN) { 2243 st->flags |= ST_EOM_PENDING; 2244 retval = SCSIRET_NOERROR; 2245 } else { 2246 retval = EIO; 2247 } 2248 2249 /* 2250 * If it's an unadorned EOM detection, 2251 * suppress printing an error. 2252 */ 2253 if (key == SKEY_NO_SENSE) { 2254 doprint = 0; 2255 } 2256 } else if (sense->flags & SSD_FILEMARK) { 2257 retval = SCSIRET_NOERROR; 2258 } else if (sense->flags & SSD_ILI) { 2259 if (info < 0) { 2260 /* 2261 * The tape record was bigger than the read 2262 * we issued. 2263 */ 2264 if ((xs->flags & SCSI_SILENT) == 0) { 2265 printf("%s: %d-byte tape record too big" 2266 " for %d-byte user buffer\n", 2267 st->sc_dev.dv_xname, 2268 xs->datalen - info, xs->datalen); 2269 } 2270 retval = EIO; 2271 } else { 2272 retval = SCSIRET_NOERROR; 2273 } 2274 } 2275 xs->resid = info; 2276 if (bp) 2277 bp->b_resid = info; 2278 } 2279 2280 #ifndef SCSIDEBUG 2281 if (retval == SCSIRET_NOERROR && key == SKEY_NO_SENSE) { 2282 doprint = 0; 2283 } 2284 #endif 2285 if (key == SKEY_BLANK_CHECK) { 2286 /* 2287 * This quirk code helps the drive read the 2288 * first tape block, regardless of format. That 2289 * is required for these drives to return proper 2290 * MODE SENSE information. 2291 */ 2292 if ((st->quirks & ST_Q_SENSE_HELP) && 2293 !(sc_link->flags & SDEV_MEDIA_LOADED)) { 2294 /* still starting */ 2295 st->blksize -= 512; 2296 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 2297 st->flags |= ST_BLANK_READ; 2298 xs->resid = xs->datalen; 2299 if (bp) { 2300 bp->b_resid = xs->resid; 2301 /* return an EOF */ 2302 } 2303 retval = SCSIRET_NOERROR; 2304 } 2305 } 2306 #ifdef SCSIVERBOSE 2307 if (doprint) { 2308 scsi_print_sense(xs, 0); 2309 } 2310 #else 2311 if (doprint) { 2312 xs->sc_link->sc_print_addr(xs->sc_link); 2313 printf("Sense Key 0x%02x", key); 2314 if ((sense->error_code & SSD_ERRCODE_VALID) != 0) { 2315 switch (key) { 2316 case SKEY_NOT_READY: 2317 case SKEY_ILLEGAL_REQUEST: 2318 case SKEY_UNIT_ATTENTION: 2319 case SKEY_WRITE_PROTECT: 2320 break; 2321 case SKEY_BLANK_CHECK: 2322 printf(", requested size: %d (decimal)", info); 2323 break; 2324 case SKEY_ABORTED_COMMAND: 2325 if (xs->retries) 2326 printf(", retrying"); 2327 printf(", cmd 0x%x, info 0x%x", 2328 xs->cmd->opcode, info); 2329 break; 2330 default: 2331 printf(", info = %d (decimal)", info); 2332 } 2333 } 2334 if (sense->extra_len != 0) { 2335 int n; 2336 printf(", data ="); 2337 for (n = 0; n < sense->extra_len; n++) 2338 printf(" %02x", sense->cmd_spec_info[n]); 2339 } 2340 printf("\n"); 2341 } 2342 #endif 2343 return (retval); 2344 } 2345 2346 /* 2347 * The quirk here is that the drive returns some value to st_mode_sense 2348 * incorrectly until the tape has actually passed by the head. 2349 * 2350 * The method is to set the drive to large fixed-block state (user-specified 2351 * density and 1024-byte blocks), then read and rewind to get it to sense the 2352 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 2353 * work, as a last resort, try variable- length blocks. The result will be 2354 * the ability to do an accurate st_mode_sense. 2355 * 2356 * We know we can do a rewind because we just did a load, which implies rewind. 2357 * Rewind seems preferable to space backward if we have a virgin tape. 2358 * 2359 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 2360 * error processing, both part of st_interpret_sense. 2361 */ 2362 int 2363 st_touch_tape(st) 2364 struct st_softc *st; 2365 { 2366 char *buf; 2367 int readsize; 2368 int error; 2369 2370 buf = malloc(1024, M_TEMP, M_NOWAIT); 2371 if (buf == NULL) 2372 return (ENOMEM); 2373 2374 if ((error = st_mode_sense(st, 0)) != 0) 2375 goto bad; 2376 st->blksize = 1024; 2377 do { 2378 switch (st->blksize) { 2379 case 512: 2380 case 1024: 2381 readsize = st->blksize; 2382 st->flags |= ST_FIXEDBLOCKS; 2383 break; 2384 default: 2385 readsize = 1; 2386 st->flags &= ~ST_FIXEDBLOCKS; 2387 } 2388 if ((error = st_mode_select(st, 0)) != 0) 2389 goto bad; 2390 st_read(st, buf, readsize, SCSI_SILENT); /* XXX */ 2391 if ((error = st_rewind(st, 0, 0)) != 0) { 2392 bad: free(buf, M_TEMP); 2393 return (error); 2394 } 2395 } while (readsize != 1 && readsize > st->blksize); 2396 2397 free(buf, M_TEMP); 2398 return (0); 2399 } 2400 2401 int 2402 stdump(dev, blkno, va, size) 2403 dev_t dev; 2404 daddr_t blkno; 2405 caddr_t va; 2406 size_t size; 2407 { 2408 2409 /* Not implemented. */ 2410 return (ENXIO); 2411 } 2412