1 /* $NetBSD: st.c,v 1.114 1999/09/30 22:57:55 thorpej 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, 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, 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 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE) || 465 st_mode_sense(st, 466 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_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, 487 RND_TYPE_TAPE, 0); 488 #endif 489 } 490 491 /* 492 * Use the inquiry routine in 'scsi_base' to get drive info so we can 493 * Further tailor our behaviour. 494 */ 495 void 496 st_identify_drive(st, inqbuf) 497 struct st_softc *st; 498 struct scsipi_inquiry_pattern *inqbuf; 499 { 500 struct st_quirk_inquiry_pattern *finger; 501 int priority; 502 503 finger = (struct st_quirk_inquiry_pattern *)scsipi_inqmatch(inqbuf, 504 (caddr_t)st_quirk_patterns, 505 sizeof(st_quirk_patterns) / sizeof(st_quirk_patterns[0]), 506 sizeof(st_quirk_patterns[0]), &priority); 507 if (priority != 0) { 508 st->quirkdata = &finger->quirkdata; 509 st->drive_quirks = finger->quirkdata.quirks; 510 st->quirks = finger->quirkdata.quirks; /* start value */ 511 st->page_0_size = finger->quirkdata.page_0_size; 512 st_loadquirks(st); 513 } 514 } 515 516 /* 517 * initialise the subdevices to the default (QUIRK) state. 518 * this will remove any setting made by the system operator or previous 519 * operations. 520 */ 521 void 522 st_loadquirks(st) 523 struct st_softc *st; 524 { 525 int i; 526 struct modes *mode; 527 struct modes *mode2; 528 529 mode = st->quirkdata->modes; 530 mode2 = st->modes; 531 for (i = 0; i < 4; i++) { 532 bzero(mode2, sizeof(struct modes)); 533 st->modeflags[i] &= ~(BLKSIZE_SET_BY_QUIRK | 534 DENSITY_SET_BY_QUIRK | BLKSIZE_SET_BY_USER | 535 DENSITY_SET_BY_USER); 536 if ((mode->quirks | st->drive_quirks) & ST_Q_FORCE_BLKSIZE) { 537 mode2->blksize = mode->blksize; 538 st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; 539 } 540 if (mode->density) { 541 mode2->density = mode->density; 542 st->modeflags[i] |= DENSITY_SET_BY_QUIRK; 543 } 544 mode++; 545 mode2++; 546 } 547 } 548 549 /* 550 * open the device. 551 */ 552 int 553 stopen(dev, flags, mode, p) 554 dev_t dev; 555 int flags; 556 int mode; 557 struct proc *p; 558 { 559 int unit; 560 u_int stmode, dsty; 561 int error; 562 struct st_softc *st; 563 struct scsipi_link *sc_link; 564 565 unit = STUNIT(dev); 566 if (unit >= st_cd.cd_ndevs) 567 return (ENXIO); 568 st = st_cd.cd_devs[unit]; 569 if (st == NULL) 570 return (ENXIO); 571 572 stmode = STMODE(dev); 573 dsty = STDSTY(dev); 574 sc_link = st->sc_link; 575 576 SC_DEBUG(sc_link, SDEV_DB1, ("open: dev=0x%x (unit %d (of %d))\n", dev, 577 unit, st_cd.cd_ndevs)); 578 579 580 /* 581 * Only allow one at a time 582 */ 583 if (sc_link->flags & SDEV_OPEN) { 584 printf("%s: already open\n", st->sc_dev.dv_xname); 585 return (EBUSY); 586 } 587 588 if ((error = scsipi_adapter_addref(sc_link)) != 0) 589 return (error); 590 591 /* 592 * clear any latched errors. 593 */ 594 st->mt_resid = 0; 595 st->mt_erreg = 0; 596 597 /* 598 * Catch any unit attention errors. 599 */ 600 error = scsipi_test_unit_ready(sc_link, XS_CTL_IGNORE_MEDIA_CHANGE | 601 (stmode == CTRL_MODE ? XS_CTL_SILENT : 0)); 602 if (error && stmode != CTRL_MODE) { 603 goto bad; 604 } 605 sc_link->flags |= SDEV_OPEN; /* unit attn are now errors */ 606 607 /* 608 * If the mode is 3 (e.g. minor = 3,7,11,15) then the device has 609 * been opened to set defaults and perform other, usually non-I/O 610 * related, operations. In this case, do a quick check to see 611 * whether the unit actually had a tape loaded (this will be known 612 * as to whether or not we got a NOT READY for the above 613 * unit attention). If a tape is there, go do a mount sequence. 614 */ 615 if (stmode == CTRL_MODE && st->mt_erreg == SKEY_NOT_READY) { 616 return (0); 617 } 618 619 /* 620 * If it's a different mode, or if the media has been 621 * invalidated, unmount the tape from the previous 622 * session but continue with open processing 623 */ 624 if (st->last_dsty != dsty || !(sc_link->flags & SDEV_MEDIA_LOADED)) 625 st_unmount(st, NOEJECT); 626 627 /* 628 * If we are not mounted, then we should start a new 629 * mount session. 630 */ 631 if (!(st->flags & ST_MOUNTED)) { 632 st_mount_tape(dev, flags); 633 st->last_dsty = dsty; 634 } 635 636 SC_DEBUG(sc_link, SDEV_DB2, ("open complete\n")); 637 return (0); 638 639 bad: 640 st_unmount(st, NOEJECT); 641 scsipi_adapter_delref(sc_link); 642 sc_link->flags &= ~SDEV_OPEN; 643 return (error); 644 } 645 646 /* 647 * close the device.. only called if we are the LAST 648 * occurence of an open device 649 */ 650 int 651 stclose(dev, flags, mode, p) 652 dev_t dev; 653 int flags; 654 int mode; 655 struct proc *p; 656 { 657 int stxx, error = 0; 658 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 659 660 SC_DEBUG(st->sc_link, SDEV_DB1, ("closing\n")); 661 662 /* 663 * Make sure that a tape opened in write-only mode will have 664 * file marks written on it when closed, even if not written to. 665 * 666 * This is for SUN compatibility. Actually, the Sun way of 667 * things is to: 668 * 669 * only write filemarks if there are fmks to be written and 670 * - open for write (possibly read/write) 671 * - the last operation was a write 672 * or: 673 * - opened for wronly 674 * - no data was written (including filemarks) 675 */ 676 677 stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); 678 if (((flags & FWRITE) && stxx == ST_WRITTEN) || 679 ((flags & O_ACCMODE) == FWRITE && stxx == 0)) { 680 int nm; 681 error = st_check_eod(st, FALSE, &nm, 0); 682 } 683 684 switch (STMODE(dev)) { 685 case NORMAL_MODE: 686 st_unmount(st, NOEJECT); 687 break; 688 case NOREW_MODE: 689 case CTRL_MODE: 690 /* 691 * Leave mounted unless media seems to have been removed. 692 * 693 * Otherwise, if we're to terminate a tape with more than one 694 * filemark [ and because we're not rewinding here ], backspace 695 * one filemark so that later appends will see an unbroken 696 * sequence of: 697 * 698 * file - FMK - file - FMK ... file - FMK FMK (EOM) 699 */ 700 if (!(st->sc_link->flags & SDEV_MEDIA_LOADED)) { 701 st_unmount(st, NOEJECT); 702 } else if (error == 0) { 703 /* 704 * ST_WRITTEN was preserved from above. 705 * 706 * All we need to know here is: 707 * 708 * Were we writing this tape and was the last 709 * operation a write? 710 * 711 * Are there supposed to be 2FM at EOD? 712 * 713 * If both statements are true, then we backspace 714 * one filemark. 715 */ 716 stxx |= (st->flags & ST_2FM_AT_EOD); 717 if ((flags & FWRITE) != 0 && 718 (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { 719 error = st_space(st, -1, SP_FILEMARKS, 0); 720 } 721 } 722 break; 723 case EJECT_MODE: 724 st_unmount(st, EJECT); 725 break; 726 } 727 728 scsipi_wait_drain(st->sc_link); 729 730 scsipi_adapter_delref(st->sc_link); 731 st->sc_link->flags &= ~SDEV_OPEN; 732 733 return (error); 734 } 735 736 /* 737 * Start a new mount session. 738 * Copy in all the default parameters from the selected device mode. 739 * and try guess any that seem to be defaulted. 740 */ 741 int 742 st_mount_tape(dev, flags) 743 dev_t dev; 744 int flags; 745 { 746 int unit; 747 u_int dsty; 748 struct st_softc *st; 749 struct scsipi_link *sc_link; 750 int error = 0; 751 752 unit = STUNIT(dev); 753 dsty = STDSTY(dev); 754 st = st_cd.cd_devs[unit]; 755 sc_link = st->sc_link; 756 757 if (st->flags & ST_MOUNTED) 758 return (0); 759 760 SC_DEBUG(sc_link, SDEV_DB1, ("mounting\n ")); 761 st->flags |= ST_NEW_MOUNT; 762 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 763 /* 764 * If the media is new, then make sure we give it a chance to 765 * to do a 'load' instruction. (We assume it is new.) 766 */ 767 if ((error = st_load(st, LD_LOAD, 0)) != 0) 768 return (error); 769 /* 770 * Throw another dummy instruction to catch 771 * 'Unit attention' errors. Many drives give 772 * these after doing a Load instruction (with 773 * the MEDIUM MAY HAVE CHANGED asc/ascq). 774 */ 775 scsipi_test_unit_ready(sc_link, XS_CTL_SILENT); /* XXX */ 776 777 /* 778 * Some devices can't tell you much until they have been 779 * asked to look at the media. This quirk does this. 780 */ 781 if (st->quirks & ST_Q_SENSE_HELP) 782 if ((error = st_touch_tape(st)) != 0) 783 return (error); 784 /* 785 * Load the physical device parameters 786 * loads: blkmin, blkmax 787 */ 788 if ((error = st_read_block_limits(st, 0)) != 0) 789 return (error); 790 /* 791 * Load the media dependent parameters 792 * includes: media_blksize,media_density,numblks 793 * As we have a tape in, it should be reflected here. 794 * If not you may need the "quirk" above. 795 */ 796 if ((error = st_mode_sense(st, 0)) != 0) 797 return (error); 798 /* 799 * If we have gained a permanent density from somewhere, 800 * then use it in preference to the one supplied by 801 * default by the driver. 802 */ 803 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 804 st->density = st->modes[dsty].density; 805 else 806 st->density = st->media_density; 807 /* 808 * If we have gained a permanent blocksize 809 * then use it in preference to the one supplied by 810 * default by the driver. 811 */ 812 st->flags &= ~ST_FIXEDBLOCKS; 813 if (st->modeflags[dsty] & 814 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 815 st->blksize = st->modes[dsty].blksize; 816 if (st->blksize) 817 st->flags |= ST_FIXEDBLOCKS; 818 } else { 819 if ((error = st_decide_mode(st, FALSE)) != 0) 820 return (error); 821 } 822 if ((error = st_mode_select(st, 0)) != 0) { 823 printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); 824 return (error); 825 } 826 scsipi_prevent(sc_link, PR_PREVENT, 827 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 828 st->flags &= ~ST_NEW_MOUNT; 829 st->flags |= ST_MOUNTED; 830 sc_link->flags |= SDEV_MEDIA_LOADED; /* move earlier? */ 831 832 return (0); 833 } 834 835 /* 836 * End the present mount session. 837 * Rewind, and optionally eject the tape. 838 * Reset various flags to indicate that all new 839 * operations require another mount operation 840 */ 841 void 842 st_unmount(st, eject) 843 struct st_softc *st; 844 boolean eject; 845 { 846 struct scsipi_link *sc_link = st->sc_link; 847 int nmarks; 848 849 if (!(st->flags & ST_MOUNTED)) 850 return; 851 SC_DEBUG(sc_link, SDEV_DB1, ("unmounting\n")); 852 st_check_eod(st, FALSE, &nmarks, XS_CTL_IGNORE_NOT_READY); 853 st_rewind(st, 0, XS_CTL_IGNORE_NOT_READY); 854 scsipi_prevent(sc_link, PR_ALLOW, 855 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 856 if (eject) 857 st_load(st, LD_UNLOAD, XS_CTL_IGNORE_NOT_READY); 858 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 859 sc_link->flags &= ~SDEV_MEDIA_LOADED; 860 } 861 862 /* 863 * Given all we know about the device, media, mode, 'quirks' and 864 * initial operation, make a decision as to how we should be set 865 * to run (regarding blocking and EOD marks) 866 */ 867 int 868 st_decide_mode(st, first_read) 869 struct st_softc *st; 870 boolean first_read; 871 { 872 #ifdef SCSIDEBUG 873 struct scsipi_link *sc_link = st->sc_link; 874 #endif 875 876 SC_DEBUG(sc_link, SDEV_DB2, ("starting block mode decision\n")); 877 878 /* 879 * If the drive can only handle fixed-length blocks and only at 880 * one size, perhaps we should just do that. 881 */ 882 if (st->blkmin && (st->blkmin == st->blkmax)) { 883 st->flags |= ST_FIXEDBLOCKS; 884 st->blksize = st->blkmin; 885 SC_DEBUG(sc_link, SDEV_DB3, 886 ("blkmin == blkmax of %d\n", st->blkmin)); 887 goto done; 888 } 889 /* 890 * If the tape density mandates (or even suggests) use of fixed 891 * or variable-length blocks, comply. 892 */ 893 switch (st->density) { 894 case HALFINCH_800: 895 case HALFINCH_1600: 896 case HALFINCH_6250: 897 case DDS: 898 st->flags &= ~ST_FIXEDBLOCKS; 899 st->blksize = 0; 900 SC_DEBUG(sc_link, SDEV_DB3, ("density specified variable\n")); 901 goto done; 902 case QIC_11: 903 case QIC_24: 904 case QIC_120: 905 case QIC_150: 906 case QIC_525: 907 case QIC_1320: 908 st->flags |= ST_FIXEDBLOCKS; 909 if (st->media_blksize > 0) 910 st->blksize = st->media_blksize; 911 else 912 st->blksize = DEF_FIXED_BSIZE; 913 SC_DEBUG(sc_link, SDEV_DB3, ("density specified fixed\n")); 914 goto done; 915 } 916 /* 917 * If we're about to read the tape, perhaps we should choose 918 * fixed or variable-length blocks and block size according to 919 * what the drive found on the tape. 920 */ 921 if (first_read && 922 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 923 (st->media_blksize == DEF_FIXED_BSIZE) || 924 (st->media_blksize == 1024))) { 925 if (st->media_blksize > 0) 926 st->flags |= ST_FIXEDBLOCKS; 927 else 928 st->flags &= ~ST_FIXEDBLOCKS; 929 st->blksize = st->media_blksize; 930 SC_DEBUG(sc_link, SDEV_DB3, 931 ("Used media_blksize of %d\n", st->media_blksize)); 932 goto done; 933 } 934 /* 935 * We're getting no hints from any direction. Choose variable- 936 * length blocks arbitrarily. 937 */ 938 st->flags &= ~ST_FIXEDBLOCKS; 939 st->blksize = 0; 940 SC_DEBUG(sc_link, SDEV_DB3, 941 ("Give up and default to variable mode\n")); 942 943 done: 944 /* 945 * Decide whether or not to write two file marks to signify end- 946 * of-data. Make the decision as a function of density. If 947 * the decision is not to use a second file mark, the SCSI BLANK 948 * CHECK condition code will be recognized as end-of-data when 949 * first read. 950 * (I think this should be a by-product of fixed/variable..julian) 951 */ 952 switch (st->density) { 953 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 954 case QIC_11: 955 case QIC_24: 956 case QIC_120: 957 case QIC_150: 958 case QIC_525: 959 case QIC_1320: 960 st->flags &= ~ST_2FM_AT_EOD; 961 break; 962 default: 963 st->flags |= ST_2FM_AT_EOD; 964 } 965 return (0); 966 } 967 968 /* 969 * Actually translate the requested transfer into 970 * one the physical driver can understand 971 * The transfer is described by a buf and will include 972 * only one physical transfer. 973 */ 974 void 975 ststrategy(bp) 976 struct buf *bp; 977 { 978 struct st_softc *st = st_cd.cd_devs[STUNIT(bp->b_dev)]; 979 struct buf *dp; 980 int s; 981 982 SC_DEBUG(st->sc_link, SDEV_DB1, 983 ("ststrategy %ld bytes @ blk %d\n", bp->b_bcount, bp->b_blkno)); 984 /* 985 * If it's a null transfer, return immediatly 986 */ 987 if (bp->b_bcount == 0) 988 goto done; 989 990 /* If offset is negative, error */ 991 if (bp->b_blkno < 0) { 992 bp->b_error = EINVAL; 993 goto bad; 994 } 995 996 /* 997 * Odd sized request on fixed drives are verboten 998 */ 999 if (st->flags & ST_FIXEDBLOCKS) { 1000 if (bp->b_bcount % st->blksize) { 1001 printf("%s: bad request, must be multiple of %d\n", 1002 st->sc_dev.dv_xname, st->blksize); 1003 bp->b_error = EIO; 1004 goto bad; 1005 } 1006 } 1007 /* 1008 * as are out-of-range requests on variable drives. 1009 */ 1010 else if (bp->b_bcount < st->blkmin || 1011 (st->blkmax && bp->b_bcount > st->blkmax)) { 1012 printf("%s: bad request, must be between %d and %d\n", 1013 st->sc_dev.dv_xname, st->blkmin, st->blkmax); 1014 bp->b_error = EIO; 1015 goto bad; 1016 } 1017 s = splbio(); 1018 1019 /* 1020 * Place it in the queue of activities for this tape 1021 * at the end (a bit silly because we only have on user.. 1022 * (but it could fork())) 1023 */ 1024 dp = &st->buf_queue; 1025 bp->b_actf = NULL; 1026 bp->b_actb = dp->b_actb; 1027 *dp->b_actb = bp; 1028 dp->b_actb = &bp->b_actf; 1029 1030 /* 1031 * Tell the device to get going on the transfer if it's 1032 * not doing anything, otherwise just wait for completion 1033 * (All a bit silly if we're only allowing 1 open but..) 1034 */ 1035 ststart(st); 1036 1037 splx(s); 1038 return; 1039 bad: 1040 bp->b_flags |= B_ERROR; 1041 done: 1042 /* 1043 * Correctly set the buf to indicate a completed xfer 1044 */ 1045 bp->b_resid = bp->b_bcount; 1046 biodone(bp); 1047 return; 1048 } 1049 1050 /* 1051 * ststart looks to see if there is a buf waiting for the device 1052 * and that the device is not already busy. If both are true, 1053 * It dequeues the buf and creates a scsi command to perform the 1054 * transfer required. The transfer request will call scsipi_done 1055 * on completion, which will in turn call this routine again 1056 * so that the next queued transfer is performed. 1057 * The bufs are queued by the strategy routine (ststrategy) 1058 * 1059 * This routine is also called after other non-queued requests 1060 * have been made of the scsi driver, to ensure that the queue 1061 * continues to be drained. 1062 * ststart() is called at splbio 1063 */ 1064 void 1065 ststart(v) 1066 void *v; 1067 { 1068 struct st_softc *st = v; 1069 struct scsipi_link *sc_link = st->sc_link; 1070 register struct buf *bp, *dp; 1071 struct scsi_rw_tape cmd; 1072 int flags, error; 1073 1074 SC_DEBUG(sc_link, SDEV_DB2, ("ststart ")); 1075 /* 1076 * See if there is a buf to do and we are not already 1077 * doing one 1078 */ 1079 while (sc_link->active < sc_link->openings) { 1080 /* if a special awaits, let it proceed first */ 1081 if (sc_link->flags & SDEV_WAITING) { 1082 sc_link->flags &= ~SDEV_WAITING; 1083 wakeup((caddr_t)sc_link); 1084 return; 1085 } 1086 1087 dp = &st->buf_queue; 1088 if ((bp = dp->b_actf) == NULL) 1089 return; 1090 if ((dp = bp->b_actf) != NULL) 1091 dp->b_actb = bp->b_actb; 1092 else 1093 st->buf_queue.b_actb = bp->b_actb; 1094 *bp->b_actb = dp; 1095 1096 /* 1097 * if the device has been unmounted bye the user 1098 * then throw away all requests until done 1099 */ 1100 if (!(st->flags & ST_MOUNTED) || 1101 !(sc_link->flags & SDEV_MEDIA_LOADED)) { 1102 /* make sure that one implies the other.. */ 1103 sc_link->flags &= ~SDEV_MEDIA_LOADED; 1104 bp->b_flags |= B_ERROR; 1105 bp->b_error = EIO; 1106 bp->b_resid = bp->b_bcount; 1107 biodone(bp); 1108 continue; 1109 } 1110 /* 1111 * only FIXEDBLOCK devices have pending I/O or space operations. 1112 */ 1113 if (st->flags & ST_FIXEDBLOCKS) { 1114 /* 1115 * If we are at a filemark but have not reported it yet 1116 * then we should report it now 1117 */ 1118 if (st->flags & ST_AT_FILEMARK) { 1119 if ((bp->b_flags & B_READ) == B_WRITE) { 1120 /* 1121 * Handling of ST_AT_FILEMARK in 1122 * st_space will fill in the right file 1123 * mark count. 1124 * Back up over filemark 1125 */ 1126 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1127 bp->b_flags |= B_ERROR; 1128 bp->b_error = EIO; 1129 biodone(bp); 1130 continue; 1131 } 1132 } else { 1133 bp->b_resid = bp->b_bcount; 1134 bp->b_error = 0; 1135 bp->b_flags &= ~B_ERROR; 1136 st->flags &= ~ST_AT_FILEMARK; 1137 biodone(bp); 1138 continue; /* seek more work */ 1139 } 1140 } 1141 } 1142 /* 1143 * If we are at EOM but have not reported it 1144 * yet then we should report it now. 1145 */ 1146 if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { 1147 bp->b_resid = bp->b_bcount; 1148 if (st->flags & ST_EIO_PENDING) { 1149 bp->b_error = EIO; 1150 bp->b_flags |= B_ERROR; 1151 } 1152 st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); 1153 biodone(bp); 1154 continue; /* seek more work */ 1155 } 1156 1157 /* 1158 * Fill out the scsi command 1159 */ 1160 bzero(&cmd, sizeof(cmd)); 1161 if ((bp->b_flags & B_READ) == B_WRITE) { 1162 cmd.opcode = WRITE; 1163 st->flags &= ~ST_FM_WRITTEN; 1164 flags = XS_CTL_DATA_OUT; 1165 } else { 1166 cmd.opcode = READ; 1167 flags = XS_CTL_DATA_IN; 1168 } 1169 1170 /* 1171 * Handle "fixed-block-mode" tape drives by using the 1172 * block count instead of the length. 1173 */ 1174 if (st->flags & ST_FIXEDBLOCKS) { 1175 cmd.byte2 |= SRW_FIXED; 1176 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1177 } else 1178 _lto3b(bp->b_bcount, cmd.len); 1179 1180 /* 1181 * go ask the adapter to do all this for us 1182 * XXX Really need NOSLEEP? 1183 */ 1184 error = scsipi_command(sc_link, 1185 (struct scsipi_generic *)&cmd, sizeof(cmd), 1186 (u_char *)bp->b_data, bp->b_bcount, 1187 0, ST_IO_TIME, bp, flags | XS_CTL_NOSLEEP | XS_CTL_ASYNC); 1188 if (error) { 1189 printf("%s: not queued, error %d\n", 1190 st->sc_dev.dv_xname, error); 1191 } 1192 } /* go back and see if we can cram more work in.. */ 1193 } 1194 1195 void 1196 stdone(xs) 1197 struct scsipi_xfer *xs; 1198 { 1199 1200 if (xs->bp != NULL) { 1201 struct st_softc *st = xs->sc_link->device_softc; 1202 if ((xs->bp->b_flags & B_READ) == B_WRITE) { 1203 st->flags |= ST_WRITTEN; 1204 } else { 1205 st->flags &= ~ST_WRITTEN; 1206 } 1207 #if NRND > 0 1208 rnd_add_uint32(&st->rnd_source, xs->bp->b_blkno); 1209 #endif 1210 } 1211 } 1212 1213 int 1214 stread(dev, uio, iomode) 1215 dev_t dev; 1216 struct uio *uio; 1217 int iomode; 1218 { 1219 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1220 1221 return (physio(ststrategy, NULL, dev, B_READ, 1222 st->sc_link->adapter->scsipi_minphys, uio)); 1223 } 1224 1225 int 1226 stwrite(dev, uio, iomode) 1227 dev_t dev; 1228 struct uio *uio; 1229 int iomode; 1230 { 1231 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1232 1233 return (physio(ststrategy, NULL, dev, B_WRITE, 1234 st->sc_link->adapter->scsipi_minphys, uio)); 1235 } 1236 1237 /* 1238 * Perform special action on behalf of the user; 1239 * knows about the internals of this device 1240 */ 1241 int 1242 stioctl(dev, cmd, arg, flag, p) 1243 dev_t dev; 1244 u_long cmd; 1245 caddr_t arg; 1246 int flag; 1247 struct proc *p; 1248 { 1249 int error = 0; 1250 int unit; 1251 int number, nmarks, dsty; 1252 int flags; 1253 struct st_softc *st; 1254 int hold_blksize; 1255 u_int8_t hold_density; 1256 struct mtop *mt = (struct mtop *) arg; 1257 1258 /* 1259 * Find the device that the user is talking about 1260 */ 1261 flags = 0; /* give error messages, act on errors etc. */ 1262 unit = STUNIT(dev); 1263 dsty = STDSTY(dev); 1264 st = st_cd.cd_devs[unit]; 1265 hold_blksize = st->blksize; 1266 hold_density = st->density; 1267 1268 switch ((u_int) cmd) { 1269 1270 case MTIOCGET: { 1271 struct mtget *g = (struct mtget *) arg; 1272 /* 1273 * (to get the current state of READONLY) 1274 */ 1275 error = st_mode_sense(st, XS_CTL_SILENT); 1276 if (error) 1277 break; 1278 SC_DEBUG(st->sc_link, SDEV_DB1, ("[ioctl: get status]\n")); 1279 bzero(g, sizeof(struct mtget)); 1280 g->mt_type = 0x7; /* Ultrix compat *//*? */ 1281 g->mt_blksiz = st->blksize; 1282 g->mt_density = st->density; 1283 g->mt_mblksiz[0] = st->modes[0].blksize; 1284 g->mt_mblksiz[1] = st->modes[1].blksize; 1285 g->mt_mblksiz[2] = st->modes[2].blksize; 1286 g->mt_mblksiz[3] = st->modes[3].blksize; 1287 g->mt_mdensity[0] = st->modes[0].density; 1288 g->mt_mdensity[1] = st->modes[1].density; 1289 g->mt_mdensity[2] = st->modes[2].density; 1290 g->mt_mdensity[3] = st->modes[3].density; 1291 if (st->flags & ST_READONLY) 1292 g->mt_dsreg |= MT_DS_RDONLY; 1293 if (st->flags & ST_MOUNTED) 1294 g->mt_dsreg |= MT_DS_MOUNTED; 1295 g->mt_resid = st->mt_resid; 1296 g->mt_erreg = st->mt_erreg; 1297 /* 1298 * clear latched errors. 1299 */ 1300 st->mt_resid = 0; 1301 st->mt_erreg = 0; 1302 break; 1303 } 1304 case MTIOCTOP: { 1305 1306 SC_DEBUG(st->sc_link, SDEV_DB1, 1307 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1308 mt->mt_count)); 1309 1310 /* compat: in U*x it is a short */ 1311 number = mt->mt_count; 1312 switch ((short) (mt->mt_op)) { 1313 case MTWEOF: /* write an end-of-file record */ 1314 error = st_write_filemarks(st, number, flags); 1315 break; 1316 case MTBSF: /* backward space file */ 1317 number = -number; 1318 case MTFSF: /* forward space file */ 1319 error = st_check_eod(st, FALSE, &nmarks, flags); 1320 if (!error) 1321 error = st_space(st, number - nmarks, 1322 SP_FILEMARKS, flags); 1323 break; 1324 case MTBSR: /* backward space record */ 1325 number = -number; 1326 case MTFSR: /* forward space record */ 1327 error = st_check_eod(st, TRUE, &nmarks, flags); 1328 if (!error) 1329 error = st_space(st, number, SP_BLKS, flags); 1330 break; 1331 case MTREW: /* rewind */ 1332 error = st_rewind(st, 0, flags); 1333 break; 1334 case MTOFFL: /* rewind and put the drive offline */ 1335 st_unmount(st, EJECT); 1336 break; 1337 case MTNOP: /* no operation, sets status only */ 1338 break; 1339 case MTRETEN: /* retension the tape */ 1340 error = st_load(st, LD_RETENSION, flags); 1341 if (!error) 1342 error = st_load(st, LD_LOAD, flags); 1343 break; 1344 case MTEOM: /* forward space to end of media */ 1345 error = st_check_eod(st, FALSE, &nmarks, flags); 1346 if (!error) 1347 error = st_space(st, 1, SP_EOM, flags); 1348 break; 1349 case MTCACHE: /* enable controller cache */ 1350 st->flags &= ~ST_DONTBUFFER; 1351 goto try_new_value; 1352 case MTNOCACHE: /* disable controller cache */ 1353 st->flags |= ST_DONTBUFFER; 1354 goto try_new_value; 1355 case MTERASE: /* erase volume */ 1356 error = st_erase(st, number, flags); 1357 break; 1358 case MTSETBSIZ: /* Set block size for device */ 1359 #ifdef NOTYET 1360 if (!(st->flags & ST_NEW_MOUNT)) { 1361 uprintf("re-mount tape before changing blocksize"); 1362 error = EINVAL; 1363 break; 1364 } 1365 #endif 1366 if (number == 0) 1367 st->flags &= ~ST_FIXEDBLOCKS; 1368 else { 1369 if ((st->blkmin || st->blkmax) && 1370 (number < st->blkmin || 1371 number > st->blkmax)) { 1372 error = EINVAL; 1373 break; 1374 } 1375 st->flags |= ST_FIXEDBLOCKS; 1376 } 1377 st->blksize = number; 1378 st->flags |= ST_BLOCK_SET; /*XXX */ 1379 goto try_new_value; 1380 1381 case MTSETDNSTY: /* Set density for device and mode */ 1382 /* 1383 * Any number >= 0 and <= 0xff is legal. Numbers 1384 * above 0x80 are 'vendor unique'. 1385 */ 1386 if (number < 0 || number > 255) { 1387 error = EINVAL; 1388 break; 1389 } else 1390 st->density = number; 1391 goto try_new_value; 1392 1393 case MTCMPRESS: 1394 error = st_cmprss(st, number); 1395 break; 1396 1397 case MTEWARN: 1398 if (number) 1399 st->flags |= ST_EARLYWARN; 1400 else 1401 st->flags &= ~ST_EARLYWARN; 1402 break; 1403 1404 default: 1405 error = EINVAL; 1406 } 1407 break; 1408 } 1409 case MTIOCIEOT: 1410 case MTIOCEEOT: 1411 break; 1412 1413 case MTIOCRDSPOS: 1414 error = st_rdpos(st, 0, (u_int32_t *) arg); 1415 break; 1416 1417 case MTIOCRDHPOS: 1418 error = st_rdpos(st, 1, (u_int32_t *) arg); 1419 break; 1420 1421 case MTIOCSLOCATE: 1422 error = st_setpos(st, 0, (u_int32_t *) arg); 1423 break; 1424 1425 case MTIOCHLOCATE: 1426 error = st_setpos(st, 1, (u_int32_t *) arg); 1427 break; 1428 1429 1430 default: 1431 error = scsipi_do_ioctl(st->sc_link, dev, cmd, arg, 1432 flag, p); 1433 break; 1434 } 1435 return (error); 1436 /*-----------------------------*/ 1437 try_new_value: 1438 /* 1439 * Check that the mode being asked for is aggreeable to the 1440 * drive. If not, put it back the way it was. 1441 */ 1442 if ((error = st_mode_select(st, 0)) != 0) {/* put it back as it was */ 1443 printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); 1444 st->density = hold_density; 1445 st->blksize = hold_blksize; 1446 if (st->blksize) 1447 st->flags |= ST_FIXEDBLOCKS; 1448 else 1449 st->flags &= ~ST_FIXEDBLOCKS; 1450 return (error); 1451 } 1452 /* 1453 * As the drive liked it, if we are setting a new default, 1454 * set it into the structures as such. 1455 * 1456 * The means for deciding this are not finalised yet- but 1457 * if the device was opened in Control Mode, the values 1458 * are persistent now across mounts. 1459 */ 1460 if (STMODE(dev) == CTRL_MODE) { 1461 switch ((short) (mt->mt_op)) { 1462 case MTSETBSIZ: 1463 st->modes[dsty].blksize = st->blksize; 1464 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1465 break; 1466 case MTSETDNSTY: 1467 st->modes[dsty].density = st->density; 1468 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1469 break; 1470 } 1471 } 1472 return (0); 1473 } 1474 1475 /* 1476 * Do a synchronous read. 1477 */ 1478 int 1479 st_read(st, buf, size, flags) 1480 struct st_softc *st; 1481 int size; 1482 int flags; 1483 char *buf; 1484 { 1485 struct scsi_rw_tape cmd; 1486 1487 /* 1488 * If it's a null transfer, return immediatly 1489 */ 1490 if (size == 0) 1491 return (0); 1492 bzero(&cmd, sizeof(cmd)); 1493 cmd.opcode = READ; 1494 if (st->flags & ST_FIXEDBLOCKS) { 1495 cmd.byte2 |= SRW_FIXED; 1496 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1497 cmd.len); 1498 } else 1499 _lto3b(size, cmd.len); 1500 return (scsipi_command(st->sc_link, 1501 (struct scsipi_generic *)&cmd, sizeof(cmd), 1502 (u_char *)buf, size, 0, ST_IO_TIME, NULL, flags | XS_CTL_DATA_IN)); 1503 } 1504 1505 /* 1506 * Ask the drive what it's min and max blk sizes are. 1507 */ 1508 int 1509 st_read_block_limits(st, flags) 1510 struct st_softc *st; 1511 int flags; 1512 { 1513 struct scsi_block_limits cmd; 1514 struct scsi_block_limits_data block_limits; 1515 struct scsipi_link *sc_link = st->sc_link; 1516 int error; 1517 1518 /* 1519 * First check if we have it all loaded 1520 */ 1521 if ((sc_link->flags & SDEV_MEDIA_LOADED)) 1522 return (0); 1523 1524 /* 1525 * do a 'Read Block Limits' 1526 */ 1527 bzero(&cmd, sizeof(cmd)); 1528 cmd.opcode = READ_BLOCK_LIMITS; 1529 1530 /* 1531 * do the command, update the global values 1532 */ 1533 error = scsipi_command(sc_link, (struct scsipi_generic *)&cmd, 1534 sizeof(cmd), (u_char *)&block_limits, sizeof(block_limits), 1535 ST_RETRIES, ST_CTL_TIME, NULL, flags | XS_CTL_DATA_IN); 1536 if (error) 1537 return (error); 1538 1539 st->blkmin = _2btol(block_limits.min_length); 1540 st->blkmax = _3btol(block_limits.max_length); 1541 1542 SC_DEBUG(sc_link, SDEV_DB3, 1543 ("(%d <= blksize <= %d)\n", st->blkmin, st->blkmax)); 1544 return (0); 1545 } 1546 1547 /* 1548 * Get the scsi driver to send a full inquiry to the 1549 * device and use the results to fill out the global 1550 * parameter structure. 1551 * 1552 * called from: 1553 * attach 1554 * open 1555 * ioctl (to reset original blksize) 1556 */ 1557 int 1558 st_mode_sense(st, flags) 1559 struct st_softc *st; 1560 int flags; 1561 { 1562 u_int scsipi_sense_len; 1563 int error; 1564 struct scsi_mode_sense cmd; 1565 struct scsipi_sense { 1566 struct scsi_mode_header header; 1567 struct scsi_blk_desc blk_desc; 1568 u_char sense_data[MAX_PAGE_0_SIZE]; 1569 } scsipi_sense; 1570 struct scsipi_link *sc_link = st->sc_link; 1571 1572 scsipi_sense_len = 12 + st->page_0_size; 1573 1574 /* 1575 * Set up a mode sense 1576 */ 1577 bzero(&cmd, sizeof(cmd)); 1578 cmd.opcode = SCSI_MODE_SENSE; 1579 cmd.length = scsipi_sense_len; 1580 1581 /* 1582 * do the command, but we don't need the results 1583 * just print them for our interest's sake, if asked, 1584 * or if we need it as a template for the mode select 1585 * store it away. 1586 */ 1587 error = scsipi_command(sc_link, (struct scsipi_generic *)&cmd, 1588 sizeof(cmd), (u_char *)&scsipi_sense, scsipi_sense_len, 1589 ST_RETRIES, ST_CTL_TIME, NULL, flags | XS_CTL_DATA_IN); 1590 if (error) 1591 return (error); 1592 1593 st->numblks = _3btol(scsipi_sense.blk_desc.nblocks); 1594 st->media_blksize = _3btol(scsipi_sense.blk_desc.blklen); 1595 st->media_density = scsipi_sense.blk_desc.density; 1596 if (scsipi_sense.header.dev_spec & SMH_DSP_WRITE_PROT) 1597 st->flags |= ST_READONLY; 1598 else 1599 st->flags &= ~ST_READONLY; 1600 SC_DEBUG(sc_link, SDEV_DB3, 1601 ("density code 0x%x, %d-byte blocks, write-%s, ", 1602 st->media_density, st->media_blksize, 1603 st->flags & ST_READONLY ? "protected" : "enabled")); 1604 SC_DEBUG(sc_link, SDEV_DB3, 1605 ("%sbuffered\n", 1606 scsipi_sense.header.dev_spec & SMH_DSP_BUFF_MODE ? "" : "un")); 1607 if (st->page_0_size) 1608 bcopy(scsipi_sense.sense_data, st->sense_data, 1609 st->page_0_size); 1610 sc_link->flags |= SDEV_MEDIA_LOADED; 1611 return (0); 1612 } 1613 1614 /* 1615 * Send a filled out parameter structure to the drive to 1616 * set it into the desire modes etc. 1617 */ 1618 int 1619 st_mode_select(st, flags) 1620 struct st_softc *st; 1621 int flags; 1622 { 1623 u_int scsi_select_len; 1624 struct scsi_mode_select cmd; 1625 struct scsi_select { 1626 struct scsi_mode_header header; 1627 struct scsi_blk_desc blk_desc; 1628 u_char sense_data[MAX_PAGE_0_SIZE]; 1629 } scsi_select; 1630 struct scsipi_link *sc_link = st->sc_link; 1631 1632 scsi_select_len = 12 + st->page_0_size; 1633 1634 /* 1635 * This quirk deals with drives that have only one valid mode 1636 * and think this gives them license to reject all mode selects, 1637 * even if the selected mode is the one that is supported. 1638 */ 1639 if (st->quirks & ST_Q_UNIMODAL) { 1640 SC_DEBUG(sc_link, SDEV_DB3, 1641 ("not setting density 0x%x blksize 0x%x\n", 1642 st->density, st->blksize)); 1643 return (0); 1644 } 1645 1646 /* 1647 * Set up for a mode select 1648 */ 1649 bzero(&cmd, sizeof(cmd)); 1650 cmd.opcode = SCSI_MODE_SELECT; 1651 cmd.length = scsi_select_len; 1652 1653 bzero(&scsi_select, scsi_select_len); 1654 scsi_select.header.blk_desc_len = sizeof(struct scsi_blk_desc); 1655 scsi_select.header.dev_spec &= ~SMH_DSP_BUFF_MODE; 1656 scsi_select.blk_desc.density = st->density; 1657 if (st->flags & ST_DONTBUFFER) 1658 scsi_select.header.dev_spec |= SMH_DSP_BUFF_MODE_OFF; 1659 else 1660 scsi_select.header.dev_spec |= SMH_DSP_BUFF_MODE_ON; 1661 if (st->flags & ST_FIXEDBLOCKS) 1662 _lto3b(st->blksize, scsi_select.blk_desc.blklen); 1663 if (st->page_0_size) 1664 bcopy(st->sense_data, scsi_select.sense_data, st->page_0_size); 1665 1666 /* 1667 * do the command 1668 */ 1669 return (scsipi_command(sc_link, (struct scsipi_generic *)&cmd, 1670 sizeof(cmd), (u_char *)&scsi_select, scsi_select_len, 1671 ST_RETRIES, ST_CTL_TIME, NULL, flags | XS_CTL_DATA_OUT)); 1672 } 1673 1674 int 1675 st_cmprss(st, onoff) 1676 struct st_softc *st; 1677 int onoff; 1678 { 1679 u_int scsi_dlen; 1680 struct scsi_mode_select mcmd; 1681 struct scsi_mode_sense scmd; 1682 struct scsi_select { 1683 struct scsi_mode_header header; 1684 struct scsi_blk_desc blk_desc; 1685 u_char pdata[max(sizeof(struct scsi_tape_dev_conf_page), 1686 sizeof(struct scsi_tape_dev_compression_page))]; 1687 } scsi_pdata; 1688 struct scsi_tape_dev_conf_page *ptr; 1689 struct scsi_tape_dev_compression_page *cptr; 1690 struct scsipi_link *sc_link = st->sc_link; 1691 int error, ison, flags; 1692 1693 scsi_dlen = sizeof(scsi_pdata); 1694 bzero(&scsi_pdata, scsi_dlen); 1695 1696 /* 1697 * Set up for a mode sense. 1698 * Do DATA COMPRESSION page first. 1699 */ 1700 bzero(&scmd, sizeof(scmd)); 1701 scmd.opcode = SCSI_MODE_SENSE; 1702 scmd.page = SMS_PAGE_CTRL_CURRENT | 0xf; 1703 scmd.length = scsi_dlen; 1704 1705 flags = XS_CTL_SILENT; 1706 1707 /* 1708 * Do the MODE SENSE command... 1709 */ 1710 again: 1711 bzero(&scsi_pdata, scsi_dlen); 1712 error = scsipi_command(sc_link, 1713 (struct scsipi_generic *)&scmd, sizeof(scmd), 1714 (u_char *)&scsi_pdata, scsi_dlen, 1715 ST_RETRIES, ST_CTL_TIME, NULL, flags | XS_CTL_DATA_IN); 1716 1717 if (error) { 1718 if (scmd.byte2 != SMS_DBD) { 1719 scmd.byte2 = SMS_DBD; 1720 goto again; 1721 } 1722 /* 1723 * Try a different page? 1724 */ 1725 if (scmd.page == (SMS_PAGE_CTRL_CURRENT | 0xf)) { 1726 scmd.page = SMS_PAGE_CTRL_CURRENT | 0x10; 1727 scmd.byte2 = 0; 1728 goto again; 1729 } 1730 return (error); 1731 } 1732 1733 if (scsi_pdata.header.blk_desc_len) 1734 ptr = (struct scsi_tape_dev_conf_page *) scsi_pdata.pdata; 1735 else 1736 ptr = (struct scsi_tape_dev_conf_page *) &scsi_pdata.blk_desc; 1737 1738 if ((scmd.page & SMS_PAGE_CODE) == 0xf) { 1739 cptr = (struct scsi_tape_dev_compression_page *) ptr; 1740 ison = (cptr->dce_dcc & DCP_DCE) != 0; 1741 if (onoff) 1742 cptr->dce_dcc |= DCP_DCE; 1743 else 1744 cptr->dce_dcc &= ~DCP_DCE; 1745 cptr->pagecode &= ~0x80; 1746 } else { 1747 ison = (ptr->sel_comp_alg != 0); 1748 if (onoff) 1749 ptr->sel_comp_alg = 1; 1750 else 1751 ptr->sel_comp_alg = 0; 1752 ptr->pagecode &= ~0x80; 1753 ptr->byte2 = 0; 1754 ptr->active_partition = 0; 1755 ptr->wb_full_ratio = 0; 1756 ptr->rb_empty_ratio = 0; 1757 ptr->byte8 &= ~0x30; 1758 ptr->gap_size = 0; 1759 ptr->byte10 &= ~0xe7; 1760 ptr->ew_bufsize[0] = 0; 1761 ptr->ew_bufsize[1] = 0; 1762 ptr->ew_bufsize[2] = 0; 1763 ptr->reserved = 0; 1764 } 1765 onoff = onoff ? 1 : 0; 1766 /* 1767 * There might be a virtue in actually doing the MODE SELECTS, 1768 * but let's not clog the bus over it. 1769 */ 1770 if (onoff == ison) 1771 return (0); 1772 1773 /* 1774 * Set up for a mode select 1775 */ 1776 1777 scsi_pdata.header.data_length = 0; 1778 scsi_pdata.header.medium_type = 0; 1779 if ((st->flags & ST_DONTBUFFER) == 0) 1780 scsi_pdata.header.dev_spec = SMH_DSP_BUFF_MODE_ON; 1781 else 1782 scsi_pdata.header.dev_spec = 0; 1783 1784 bzero(&mcmd, sizeof(mcmd)); 1785 mcmd.opcode = SCSI_MODE_SELECT; 1786 mcmd.byte2 = SMS_PF; 1787 mcmd.length = scsi_dlen; 1788 if (scsi_pdata.header.blk_desc_len) { 1789 scsi_pdata.blk_desc.density = 0; 1790 scsi_pdata.blk_desc.nblocks[0] = 0; 1791 scsi_pdata.blk_desc.nblocks[1] = 0; 1792 scsi_pdata.blk_desc.nblocks[2] = 0; 1793 } 1794 1795 /* 1796 * Do the command 1797 */ 1798 error = scsipi_command(sc_link, 1799 (struct scsipi_generic *)&mcmd, sizeof(mcmd), 1800 (u_char *)&scsi_pdata, scsi_dlen, 1801 ST_RETRIES, ST_CTL_TIME, NULL, flags | XS_CTL_DATA_OUT); 1802 1803 if (error && (scmd.page & SMS_PAGE_CODE) == 0xf) { 1804 /* 1805 * Try DEVICE CONFIGURATION page. 1806 */ 1807 scmd.page = SMS_PAGE_CTRL_CURRENT | 0x10; 1808 goto again; 1809 } 1810 return (error); 1811 } 1812 /* 1813 * issue an erase command 1814 */ 1815 int 1816 st_erase(st, full, flags) 1817 struct st_softc *st; 1818 int full, flags; 1819 { 1820 int tmo; 1821 struct scsi_erase cmd; 1822 1823 /* 1824 * Full erase means set LONG bit in erase command, which asks 1825 * the drive to erase the entire unit. Without this bit, we're 1826 * asking the drive to write an erase gap. 1827 */ 1828 bzero(&cmd, sizeof(cmd)); 1829 cmd.opcode = ERASE; 1830 if (full) { 1831 cmd.byte2 = SE_IMMED|SE_LONG; 1832 tmo = ST_SPC_TIME; 1833 } else { 1834 tmo = ST_IO_TIME; 1835 cmd.byte2 = SE_IMMED; 1836 } 1837 1838 /* 1839 * XXX We always do this asynchronously, for now. How long should 1840 * we wait if we want to (eventually) to it synchronously? 1841 */ 1842 return (scsipi_command(st->sc_link, 1843 (struct scsipi_generic *)&cmd, sizeof(cmd), 1844 0, 0, ST_RETRIES, tmo, NULL, flags)); 1845 } 1846 1847 /* 1848 * skip N blocks/filemarks/seq filemarks/eom 1849 */ 1850 int 1851 st_space(st, number, what, flags) 1852 struct st_softc *st; 1853 u_int what; 1854 int flags; 1855 int number; 1856 { 1857 struct scsi_space cmd; 1858 int error; 1859 1860 switch (what) { 1861 case SP_BLKS: 1862 if (st->flags & ST_PER_ACTION) { 1863 if (number > 0) { 1864 st->flags &= ~ST_PER_ACTION; 1865 return (EIO); 1866 } else if (number < 0) { 1867 if (st->flags & ST_AT_FILEMARK) { 1868 /* 1869 * Handling of ST_AT_FILEMARK 1870 * in st_space will fill in the 1871 * right file mark count. 1872 */ 1873 error = st_space(st, 0, SP_FILEMARKS, 1874 flags); 1875 if (error) 1876 return (error); 1877 } 1878 if (st->flags & ST_BLANK_READ) { 1879 st->flags &= ~ST_BLANK_READ; 1880 return (EIO); 1881 } 1882 st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); 1883 } 1884 } 1885 break; 1886 case SP_FILEMARKS: 1887 if (st->flags & ST_EIO_PENDING) { 1888 if (number > 0) { 1889 /* pretend we just discovered the error */ 1890 st->flags &= ~ST_EIO_PENDING; 1891 return (EIO); 1892 } else if (number < 0) { 1893 /* back away from the error */ 1894 st->flags &= ~ST_EIO_PENDING; 1895 } 1896 } 1897 if (st->flags & ST_AT_FILEMARK) { 1898 st->flags &= ~ST_AT_FILEMARK; 1899 number--; 1900 } 1901 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 1902 /* back away from unwritten tape */ 1903 st->flags &= ~ST_BLANK_READ; 1904 number++; /* XXX dubious */ 1905 } 1906 break; 1907 case SP_EOM: 1908 if (st->flags & ST_EOM_PENDING) { 1909 /* we're already there */ 1910 st->flags &= ~ST_EOM_PENDING; 1911 return (0); 1912 } 1913 if (st->flags & ST_EIO_PENDING) { 1914 /* pretend we just discovered the error */ 1915 st->flags &= ~ST_EIO_PENDING; 1916 return (EIO); 1917 } 1918 if (st->flags & ST_AT_FILEMARK) 1919 st->flags &= ~ST_AT_FILEMARK; 1920 break; 1921 } 1922 if (number == 0) 1923 return (0); 1924 1925 bzero(&cmd, sizeof(cmd)); 1926 cmd.opcode = SPACE; 1927 cmd.byte2 = what; 1928 _lto3b(number, cmd.number); 1929 1930 return (scsipi_command(st->sc_link, 1931 (struct scsipi_generic *)&cmd, sizeof(cmd), 1932 0, 0, 0, ST_SPC_TIME, NULL, flags)); 1933 } 1934 1935 /* 1936 * write N filemarks 1937 */ 1938 int 1939 st_write_filemarks(st, number, flags) 1940 struct st_softc *st; 1941 int flags; 1942 int number; 1943 { 1944 struct scsi_write_filemarks cmd; 1945 1946 /* 1947 * It's hard to write a negative number of file marks. 1948 * Don't try. 1949 */ 1950 if (number < 0) 1951 return (EINVAL); 1952 switch (number) { 1953 case 0: /* really a command to sync the drive's buffers */ 1954 break; 1955 case 1: 1956 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 1957 st->flags &= ~ST_WRITTEN; 1958 else 1959 st->flags |= ST_FM_WRITTEN; 1960 st->flags &= ~ST_PER_ACTION; 1961 break; 1962 default: 1963 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 1964 } 1965 1966 bzero(&cmd, sizeof(cmd)); 1967 cmd.opcode = WRITE_FILEMARKS; 1968 _lto3b(number, cmd.number); 1969 1970 return (scsipi_command(st->sc_link, 1971 (struct scsipi_generic *)&cmd, sizeof(cmd), 1972 0, 0, 0, ST_IO_TIME * 4, NULL, flags)); 1973 } 1974 1975 /* 1976 * Make sure the right number of file marks is on tape if the 1977 * tape has been written. If the position argument is true, 1978 * leave the tape positioned where it was originally. 1979 * 1980 * nmarks returns the number of marks to skip (or, if position 1981 * true, which were skipped) to get back original position. 1982 */ 1983 int 1984 st_check_eod(st, position, nmarks, flags) 1985 struct st_softc *st; 1986 boolean position; 1987 int *nmarks; 1988 int flags; 1989 { 1990 int error; 1991 1992 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 1993 default: 1994 *nmarks = 0; 1995 return (0); 1996 case ST_WRITTEN: 1997 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 1998 *nmarks = 1; 1999 break; 2000 case ST_WRITTEN | ST_2FM_AT_EOD: 2001 *nmarks = 2; 2002 } 2003 error = st_write_filemarks(st, *nmarks, flags); 2004 if (position && !error) 2005 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 2006 return (error); 2007 } 2008 2009 /* 2010 * load/unload/retension 2011 */ 2012 int 2013 st_load(st, type, flags) 2014 struct st_softc *st; 2015 u_int type; 2016 int flags; 2017 { 2018 int error; 2019 struct scsi_load cmd; 2020 2021 if (type != LD_LOAD) { 2022 int nmarks; 2023 2024 error = st_check_eod(st, FALSE, &nmarks, flags); 2025 if (error) { 2026 printf("%s: failed to write closing filemarks at " 2027 "unload, errno=%d\n", st->sc_dev.dv_xname, error); 2028 return (error); 2029 } 2030 } 2031 if (st->quirks & ST_Q_IGNORE_LOADS) { 2032 if (type == LD_LOAD) { 2033 /* 2034 * If we ignore loads, at least we should try a rewind. 2035 */ 2036 return st_rewind(st, 0, flags); 2037 } 2038 /* otherwise, we should do what's asked of us */ 2039 } 2040 2041 bzero(&cmd, sizeof(cmd)); 2042 cmd.opcode = LOAD; 2043 cmd.how = type; 2044 2045 error = scsipi_command(st->sc_link, 2046 (struct scsipi_generic *)&cmd, sizeof(cmd), 2047 0, 0, ST_RETRIES, ST_SPC_TIME, NULL, flags); 2048 if (error) { 2049 printf("%s: error %d in st_load (op %d)\n", 2050 st->sc_dev.dv_xname, error, type); 2051 } 2052 return (error); 2053 } 2054 2055 /* 2056 * Rewind the device 2057 */ 2058 int 2059 st_rewind(st, immediate, flags) 2060 struct st_softc *st; 2061 u_int immediate; 2062 int flags; 2063 { 2064 struct scsi_rewind cmd; 2065 int error; 2066 int nmarks; 2067 2068 error = st_check_eod(st, FALSE, &nmarks, flags); 2069 if (error) { 2070 printf("%s: failed to write closing filemarks at " 2071 "rewind, errno=%d\n", st->sc_dev.dv_xname, error); 2072 return (error); 2073 } 2074 st->flags &= ~ST_PER_ACTION; 2075 2076 bzero(&cmd, sizeof(cmd)); 2077 cmd.opcode = REWIND; 2078 cmd.byte2 = immediate; 2079 2080 error = scsipi_command(st->sc_link, 2081 (struct scsipi_generic *)&cmd, sizeof(cmd), 0, 0, ST_RETRIES, 2082 immediate ? ST_CTL_TIME: ST_SPC_TIME, NULL, flags); 2083 if (error) { 2084 printf("%s: error %d trying to rewind\n", 2085 st->sc_dev.dv_xname, error); 2086 } 2087 return (error); 2088 } 2089 2090 int 2091 st_rdpos(st, hard, blkptr) 2092 struct st_softc *st; 2093 int hard; 2094 u_int32_t *blkptr; 2095 { 2096 int error; 2097 u_int8_t posdata[20]; 2098 struct scsi_tape_read_position cmd; 2099 2100 /* 2101 * First flush any pending writes... 2102 */ 2103 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 2104 2105 /* 2106 * The latter case is for 'write protected' tapes 2107 * which are too stupid to recognize a zero count 2108 * for writing filemarks as a no-op. 2109 */ 2110 if (error != 0 && error != EACCES && error != EROFS) 2111 return (error); 2112 2113 bzero(&cmd, sizeof(cmd)); 2114 bzero(&posdata, sizeof(posdata)); 2115 cmd.opcode = READ_POSITION; 2116 if (hard) 2117 cmd.byte1 = 1; 2118 2119 error = scsipi_command(st->sc_link, 2120 (struct scsipi_generic *)&cmd, sizeof(cmd), (u_char *)&posdata, 2121 sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, 2122 XS_CTL_SILENT | XS_CTL_DATA_IN); 2123 2124 if (error == 0) { 2125 #if 0 2126 printf("posdata:"); 2127 for (hard = 0; hard < sizeof(posdata); hard++) 2128 printf("%02x ", posdata[hard] & 0xff); 2129 printf("\n"); 2130 #endif 2131 if (posdata[0] & 0x4) /* Block Position Unknown */ 2132 error = EINVAL; 2133 else 2134 *blkptr = _4btol(&posdata[4]); 2135 } 2136 return (error); 2137 } 2138 2139 int 2140 st_setpos(st, hard, blkptr) 2141 struct st_softc *st; 2142 int hard; 2143 u_int32_t *blkptr; 2144 { 2145 int error; 2146 struct scsi_tape_locate cmd; 2147 2148 /* 2149 * First flush any pending writes. Strictly speaking, 2150 * we're not supposed to have to worry about this, 2151 * but let's be untrusting. 2152 */ 2153 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 2154 2155 /* 2156 * The latter case is for 'write protected' tapes 2157 * which are too stupid to recognize a zero count 2158 * for writing filemarks as a no-op. 2159 */ 2160 if (error != 0 && error != EACCES && error != EROFS) 2161 return (error); 2162 2163 bzero(&cmd, sizeof(cmd)); 2164 cmd.opcode = LOCATE; 2165 if (hard) 2166 cmd.byte2 = 1 << 2; 2167 _lto4b(*blkptr, cmd.blkaddr); 2168 error = scsipi_command(st->sc_link, 2169 (struct scsipi_generic *)&cmd, sizeof(cmd), 2170 NULL, 0, ST_RETRIES, ST_SPC_TIME, NULL, 0); 2171 /* 2172 * XXX: Note file && block number position now unknown (if 2173 * XXX: these things ever start being maintained in this driver) 2174 */ 2175 return (error); 2176 } 2177 2178 2179 /* 2180 * Look at the returned sense and act on the error and determine 2181 * the unix error number to pass back..., 0 (== report no error), 2182 * -1 = retry the operation, -2 continue error processing. 2183 */ 2184 int 2185 st_interpret_sense(xs) 2186 struct scsipi_xfer *xs; 2187 { 2188 struct scsipi_link *sc_link = xs->sc_link; 2189 struct scsipi_sense_data *sense = &xs->sense.scsi_sense; 2190 struct buf *bp = xs->bp; 2191 struct st_softc *st = sc_link->device_softc; 2192 int retval = SCSIRET_CONTINUE; 2193 int doprint = ((xs->xs_control & XS_CTL_SILENT) == 0); 2194 u_int8_t key; 2195 int32_t info; 2196 2197 /* 2198 * If it isn't a extended or extended/deferred error, let 2199 * the generic code handle it. 2200 */ 2201 if ((sense->error_code & SSD_ERRCODE) != 0x70 && 2202 (sense->error_code & SSD_ERRCODE) != 0x71) { /* DEFFERRED */ 2203 return (retval); 2204 } 2205 2206 if (sense->error_code & SSD_ERRCODE_VALID) 2207 info = _4btol(sense->info); 2208 else 2209 info = xs->datalen; /* bad choice if fixed blocks */ 2210 key = sense->flags & SSD_KEY; 2211 st->mt_erreg = key; 2212 st->mt_resid = (short) info; 2213 2214 /* 2215 * If the device is not open yet, let generic handle 2216 */ 2217 if ((sc_link->flags & SDEV_OPEN) == 0) { 2218 return (retval); 2219 } 2220 2221 2222 if (st->flags & ST_FIXEDBLOCKS) { 2223 xs->resid = info * st->blksize; 2224 if (sense->flags & SSD_EOM) { 2225 if ((st->flags & ST_EARLYWARN) == 0) 2226 st->flags |= ST_EIO_PENDING; 2227 st->flags |= ST_EOM_PENDING; 2228 if (bp) 2229 bp->b_resid = xs->resid; 2230 } 2231 if (sense->flags & SSD_FILEMARK) { 2232 st->flags |= ST_AT_FILEMARK; 2233 if (bp) 2234 bp->b_resid = xs->resid; 2235 } 2236 if (sense->flags & SSD_ILI) { 2237 st->flags |= ST_EIO_PENDING; 2238 if (bp) 2239 bp->b_resid = xs->resid; 2240 if (sense->error_code & SSD_ERRCODE_VALID && 2241 (xs->xs_control & XS_CTL_SILENT) == 0) 2242 printf("%s: block wrong size, %d blocks " 2243 "residual\n", st->sc_dev.dv_xname, info); 2244 2245 /* 2246 * This quirk code helps the drive read 2247 * the first tape block, regardless of 2248 * format. That is required for these 2249 * drives to return proper MODE SENSE 2250 * information. 2251 */ 2252 if ((st->quirks & ST_Q_SENSE_HELP) && 2253 !(sc_link->flags & SDEV_MEDIA_LOADED)) 2254 st->blksize -= 512; 2255 } 2256 /* 2257 * If data wanted and no data was tranfered, do it immediatly 2258 */ 2259 if (xs->datalen && xs->resid >= xs->datalen) { 2260 if (st->flags & ST_EIO_PENDING) 2261 return (EIO); 2262 if (st->flags & ST_AT_FILEMARK) { 2263 if (bp) 2264 bp->b_resid = xs->resid; 2265 return (SCSIRET_NOERROR); 2266 } 2267 } 2268 } else { /* must be variable mode */ 2269 if (sense->flags & SSD_EOM) { 2270 /* 2271 * The current semantics of this 2272 * driver requires EOM detection 2273 * to return EIO unless early 2274 * warning detection is enabled 2275 * for variable mode (this is always 2276 * on for fixed block mode). 2277 */ 2278 if (st->flags & ST_EARLYWARN) { 2279 st->flags |= ST_EOM_PENDING; 2280 retval = SCSIRET_NOERROR; 2281 } else { 2282 retval = EIO; 2283 } 2284 2285 /* 2286 * If it's an unadorned EOM detection, 2287 * suppress printing an error. 2288 */ 2289 if (key == SKEY_NO_SENSE) { 2290 doprint = 0; 2291 } 2292 } else if (sense->flags & SSD_FILEMARK) { 2293 retval = SCSIRET_NOERROR; 2294 } else if (sense->flags & SSD_ILI) { 2295 if (info < 0) { 2296 /* 2297 * The tape record was bigger than the read 2298 * we issued. 2299 */ 2300 if ((xs->xs_control & XS_CTL_SILENT) == 0) { 2301 printf("%s: %d-byte tape record too big" 2302 " for %d-byte user buffer\n", 2303 st->sc_dev.dv_xname, 2304 xs->datalen - info, xs->datalen); 2305 } 2306 retval = EIO; 2307 } else { 2308 retval = SCSIRET_NOERROR; 2309 } 2310 } 2311 xs->resid = info; 2312 if (bp) 2313 bp->b_resid = info; 2314 } 2315 2316 #ifndef SCSIDEBUG 2317 if (retval == SCSIRET_NOERROR && key == SKEY_NO_SENSE) { 2318 doprint = 0; 2319 } 2320 #endif 2321 if (key == SKEY_BLANK_CHECK) { 2322 /* 2323 * This quirk code helps the drive read the 2324 * first tape block, regardless of format. That 2325 * is required for these drives to return proper 2326 * MODE SENSE information. 2327 */ 2328 if ((st->quirks & ST_Q_SENSE_HELP) && 2329 !(sc_link->flags & SDEV_MEDIA_LOADED)) { 2330 /* still starting */ 2331 st->blksize -= 512; 2332 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 2333 st->flags |= ST_BLANK_READ; 2334 xs->resid = xs->datalen; 2335 if (bp) { 2336 bp->b_resid = xs->resid; 2337 /* return an EOF */ 2338 } 2339 retval = SCSIRET_NOERROR; 2340 } 2341 } 2342 #ifdef SCSIVERBOSE 2343 if (doprint) { 2344 scsipi_print_sense(xs, 0); 2345 } 2346 #else 2347 if (doprint) { 2348 xs->sc_link->sc_print_addr(xs->sc_link); 2349 printf("Sense Key 0x%02x", key); 2350 if ((sense->error_code & SSD_ERRCODE_VALID) != 0) { 2351 switch (key) { 2352 case SKEY_NOT_READY: 2353 case SKEY_ILLEGAL_REQUEST: 2354 case SKEY_UNIT_ATTENTION: 2355 case SKEY_WRITE_PROTECT: 2356 break; 2357 case SKEY_BLANK_CHECK: 2358 printf(", requested size: %d (decimal)", info); 2359 break; 2360 case SKEY_ABORTED_COMMAND: 2361 if (xs->retries) 2362 printf(", retrying"); 2363 printf(", cmd 0x%x, info 0x%x", 2364 xs->cmd->opcode, info); 2365 break; 2366 default: 2367 printf(", info = %d (decimal)", info); 2368 } 2369 } 2370 if (sense->extra_len != 0) { 2371 int n; 2372 printf(", data ="); 2373 for (n = 0; n < sense->extra_len; n++) 2374 printf(" %02x", sense->cmd_spec_info[n]); 2375 } 2376 printf("\n"); 2377 } 2378 #endif 2379 return (retval); 2380 } 2381 2382 /* 2383 * The quirk here is that the drive returns some value to st_mode_sense 2384 * incorrectly until the tape has actually passed by the head. 2385 * 2386 * The method is to set the drive to large fixed-block state (user-specified 2387 * density and 1024-byte blocks), then read and rewind to get it to sense the 2388 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 2389 * work, as a last resort, try variable- length blocks. The result will be 2390 * the ability to do an accurate st_mode_sense. 2391 * 2392 * We know we can do a rewind because we just did a load, which implies rewind. 2393 * Rewind seems preferable to space backward if we have a virgin tape. 2394 * 2395 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 2396 * error processing, both part of st_interpret_sense. 2397 */ 2398 int 2399 st_touch_tape(st) 2400 struct st_softc *st; 2401 { 2402 char *buf; 2403 int readsize; 2404 int error; 2405 2406 buf = malloc(1024, M_TEMP, M_NOWAIT); 2407 if (buf == NULL) 2408 return (ENOMEM); 2409 2410 if ((error = st_mode_sense(st, 0)) != 0) 2411 goto bad; 2412 st->blksize = 1024; 2413 do { 2414 switch (st->blksize) { 2415 case 512: 2416 case 1024: 2417 readsize = st->blksize; 2418 st->flags |= ST_FIXEDBLOCKS; 2419 break; 2420 default: 2421 readsize = 1; 2422 st->flags &= ~ST_FIXEDBLOCKS; 2423 } 2424 if ((error = st_mode_select(st, 0)) != 0) 2425 goto bad; 2426 st_read(st, buf, readsize, XS_CTL_SILENT); /* XXX */ 2427 if ((error = st_rewind(st, 0, 0)) != 0) { 2428 bad: free(buf, M_TEMP); 2429 return (error); 2430 } 2431 } while (readsize != 1 && readsize > st->blksize); 2432 2433 free(buf, M_TEMP); 2434 return (0); 2435 } 2436 2437 int 2438 stdump(dev, blkno, va, size) 2439 dev_t dev; 2440 daddr_t blkno; 2441 caddr_t va; 2442 size_t size; 2443 { 2444 2445 /* Not implemented. */ 2446 return (ENXIO); 2447 } 2448