st.c revision 1.107
1 /* $NetBSD: st.c,v 1.107 1998/12/08 00:19:27 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 (at) tfs.com) 41 * for TRW Financial Systems for use under the MACH(2.5) operating system. 42 * 43 * TRW Financial Systems, in accordance with their agreement with Carnegie 44 * Mellon University, makes this software available to CMU to distribute 45 * or use in any manner that they see fit as long as this message is kept with 46 * the software. For this reason TFS also grants any other persons or 47 * organisations permission to use or modify this software. 48 * 49 * TFS supplies this software to be publicly redistributed 50 * on the understanding that TFS is not responsible for the correct 51 * functioning of this software in any circumstances. 52 * 53 * Ported to run under 386BSD by Julian Elischer (julian (at) tfs.com) Sept 1992 54 * major changes by Julian Elischer (julian (at) jules.dialix.oz.au) May 1993 55 * 56 * A lot of rewhacking done by mjacob (mjacob (at) nas.nasa.gov). 57 */ 58 59 #include "opt_scsi.h" 60 #include "rnd.h" 61 62 #include <sys/types.h> 63 #include <sys/param.h> 64 #include <sys/systm.h> 65 #include <sys/fcntl.h> 66 #include <sys/errno.h> 67 #include <sys/ioctl.h> 68 #include <sys/malloc.h> 69 #include <sys/buf.h> 70 #include <sys/proc.h> 71 #include <sys/user.h> 72 #include <sys/mtio.h> 73 #include <sys/device.h> 74 #include <sys/conf.h> 75 #if NRND > 0 76 #include <sys/rnd.h> 77 #endif 78 79 #include <dev/scsipi/scsipi_all.h> 80 #include <dev/scsipi/scsi_all.h> 81 #include <dev/scsipi/scsi_tape.h> 82 #include <dev/scsipi/scsiconf.h> 83 84 /* Defines for device specific stuff */ 85 #define DEF_FIXED_BSIZE 512 86 #define ST_RETRIES 4 /* only on non IO commands */ 87 88 #define STMODE(z) ( minor(z) & 0x03) 89 #define STDSTY(z) ((minor(z) >> 2) & 0x03) 90 #define STUNIT(z) ((minor(z) >> 4) ) 91 92 #define NORMAL_MODE 0 93 #define NOREW_MODE 1 94 #define EJECT_MODE 2 95 #define CTRL_MODE 3 96 97 #define FALSE 0 98 #define TRUE 1 99 100 #define ST_IO_TIME (3 * 60 * 1000) /* 3 minutes */ 101 #define ST_CTL_TIME (30 * 1000) /* 30 seconds */ 102 #define ST_SPC_TIME (4 * 60 * 60 * 1000) /* 4 hours */ 103 104 /* 105 * Define various devices that we know mis-behave in some way, 106 * and note how they are bad, so we can correct for them 107 */ 108 struct modes { 109 u_int quirks; /* same definitions as in quirkdata */ 110 int blksize; 111 u_int8_t density; 112 }; 113 114 struct quirkdata { 115 u_int quirks; 116 #define ST_Q_FORCE_BLKSIZE 0x0001 117 #define ST_Q_SENSE_HELP 0x0002 /* must do READ for good MODE SENSE */ 118 #define ST_Q_IGNORE_LOADS 0x0004 119 #define ST_Q_BLKSIZE 0x0008 /* variable-block media_blksize > 0 */ 120 #define ST_Q_UNIMODAL 0x0010 /* unimode drive rejects mode select */ 121 u_int page_0_size; 122 #define MAX_PAGE_0_SIZE 64 123 struct modes modes[4]; 124 }; 125 126 struct st_quirk_inquiry_pattern { 127 struct scsipi_inquiry_pattern pattern; 128 struct quirkdata quirkdata; 129 }; 130 131 struct st_quirk_inquiry_pattern st_quirk_patterns[] = { 132 {{T_SEQUENTIAL, T_REMOV, 133 " ", " ", " "}, {0, 0, { 134 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 135 {ST_Q_FORCE_BLKSIZE, 512, QIC_24}, /* minor 4-7 */ 136 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_1600}, /* minor 8-11 */ 137 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_6250} /* minor 12-15 */ 138 }}}, 139 {{T_SEQUENTIAL, T_REMOV, 140 "TANDBERG", " TDC 3600 ", ""}, {0, 12, { 141 {0, 0, 0}, /* minor 0-3 */ 142 {ST_Q_FORCE_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 143 {0, 0, QIC_150}, /* minor 8-11 */ 144 {0, 0, QIC_120} /* minor 12-15 */ 145 }}}, 146 {{T_SEQUENTIAL, T_REMOV, 147 "TANDBERG", " TDC 3800 ", ""}, {0, 0, { 148 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 149 {0, 0, QIC_525}, /* minor 4-7 */ 150 {0, 0, QIC_150}, /* minor 8-11 */ 151 {0, 0, QIC_120} /* minor 12-15 */ 152 }}}, 153 /* 154 * 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; 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 if ((error = scsipi_adapter_addref(sc_link)) != 0) 588 return (error); 589 590 /* 591 * clear any latched errors. 592 */ 593 st->mt_resid = 0; 594 st->mt_erreg = 0; 595 596 /* 597 * Catch any unit attention errors. 598 */ 599 error = scsipi_test_unit_ready(sc_link, SCSI_IGNORE_MEDIA_CHANGE | 600 (stmode == CTRL_MODE ? SCSI_SILENT : 0)); 601 if (error && stmode != CTRL_MODE) { 602 goto bad; 603 } 604 sc_link->flags |= SDEV_OPEN; /* unit attn are now errors */ 605 606 /* 607 * If the mode is 3 (e.g. minor = 3,7,11,15) then the device has 608 * been opened to set defaults and perform other, usually non-I/O 609 * related, operations. In this case, do a quick check to see 610 * whether the unit actually had a tape loaded (this will be known 611 * as to whether or not we got a NOT READY for the above 612 * unit attention). If a tape is there, go do a mount sequence. 613 */ 614 if (stmode == CTRL_MODE && st->mt_erreg == SKEY_NOT_READY) { 615 return (0); 616 } 617 618 /* 619 * If it's a different mode, or if the media has been 620 * invalidated, unmount the tape from the previous 621 * session but continue with open processing 622 */ 623 if (st->last_dsty != dsty || !(sc_link->flags & SDEV_MEDIA_LOADED)) 624 st_unmount(st, NOEJECT); 625 626 /* 627 * If we are not mounted, then we should start a new 628 * mount session. 629 */ 630 if (!(st->flags & ST_MOUNTED)) { 631 st_mount_tape(dev, flags); 632 st->last_dsty = dsty; 633 } 634 635 SC_DEBUG(sc_link, SDEV_DB2, ("open complete\n")); 636 return (0); 637 638 bad: 639 st_unmount(st, NOEJECT); 640 scsipi_adapter_delref(sc_link); 641 sc_link->flags &= ~SDEV_OPEN; 642 return (error); 643 } 644 645 /* 646 * close the device.. only called if we are the LAST 647 * occurence of an open device 648 */ 649 int 650 stclose(dev, flags, mode, p) 651 dev_t dev; 652 int flags; 653 int mode; 654 struct proc *p; 655 { 656 int stxx, error = 0; 657 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 658 659 SC_DEBUG(st->sc_link, SDEV_DB1, ("closing\n")); 660 661 /* 662 * Make sure that a tape opened in write-only mode will have 663 * file marks written on it when closed, even if not written to. 664 * 665 * This is for SUN compatibility. Actually, the Sun way of 666 * things is to: 667 * 668 * only write filemarks if there are fmks to be written and 669 * - open for write (possibly read/write) 670 * - the last operation was a write 671 * or: 672 * - opened for wronly 673 * - no data was written (including filemarks) 674 */ 675 676 stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); 677 if (((flags & FWRITE) && stxx == ST_WRITTEN) || 678 ((flags & O_ACCMODE) == FWRITE && stxx == 0)) { 679 int nm; 680 error = st_check_eod(st, FALSE, &nm, 0); 681 } 682 683 switch (STMODE(dev)) { 684 case NORMAL_MODE: 685 st_unmount(st, NOEJECT); 686 break; 687 case NOREW_MODE: 688 case CTRL_MODE: 689 /* 690 * Leave mounted unless media seems to have been removed. 691 * 692 * Otherwise, if we're to terminate a tape with more than one 693 * filemark [ and because we're not rewinding here ], backspace 694 * one filemark so that later appends will see an unbroken 695 * sequence of: 696 * 697 * file - FMK - file - FMK ... file - FMK FMK (EOM) 698 */ 699 if (!(st->sc_link->flags & SDEV_MEDIA_LOADED)) { 700 st_unmount(st, NOEJECT); 701 } else if (error == 0) { 702 /* 703 * ST_WRITTEN was preserved from above. 704 * 705 * All we need to know here is: 706 * 707 * Were we writing this tape and was the last 708 * operation a write? 709 * 710 * Are there supposed to be 2FM at EOD? 711 * 712 * If both statements are true, then we backspace 713 * one filemark. 714 */ 715 stxx |= (st->flags & ST_2FM_AT_EOD); 716 if ((flags & FWRITE) != 0 && 717 (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { 718 error = st_space(st, -1, SP_FILEMARKS, 0); 719 } 720 } 721 break; 722 case EJECT_MODE: 723 st_unmount(st, EJECT); 724 break; 725 } 726 727 scsipi_wait_drain(st->sc_link); 728 729 scsipi_adapter_delref(st->sc_link); 730 st->sc_link->flags &= ~SDEV_OPEN; 731 732 return (error); 733 } 734 735 /* 736 * Start a new mount session. 737 * Copy in all the default parameters from the selected device mode. 738 * and try guess any that seem to be defaulted. 739 */ 740 int 741 st_mount_tape(dev, flags) 742 dev_t dev; 743 int flags; 744 { 745 int unit; 746 u_int dsty; 747 struct st_softc *st; 748 struct scsipi_link *sc_link; 749 int error = 0; 750 751 unit = STUNIT(dev); 752 dsty = STDSTY(dev); 753 st = st_cd.cd_devs[unit]; 754 sc_link = st->sc_link; 755 756 if (st->flags & ST_MOUNTED) 757 return (0); 758 759 SC_DEBUG(sc_link, SDEV_DB1, ("mounting\n ")); 760 st->flags |= ST_NEW_MOUNT; 761 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 762 /* 763 * If the media is new, then make sure we give it a chance to 764 * to do a 'load' instruction. (We assume it is new.) 765 */ 766 if ((error = st_load(st, LD_LOAD, 0)) != 0) 767 return (error); 768 /* 769 * Throw another dummy instruction to catch 770 * 'Unit attention' errors. Many drives give 771 * these after doing a Load instruction (with 772 * the MEDIUM MAY HAVE CHANGED asc/ascq). 773 */ 774 scsipi_test_unit_ready(sc_link, SCSI_SILENT); /* XXX */ 775 776 /* 777 * Some devices can't tell you much until they have been 778 * asked to look at the media. This quirk does this. 779 */ 780 if (st->quirks & ST_Q_SENSE_HELP) 781 if ((error = st_touch_tape(st)) != 0) 782 return (error); 783 /* 784 * Load the physical device parameters 785 * loads: blkmin, blkmax 786 */ 787 if ((error = st_read_block_limits(st, 0)) != 0) 788 return (error); 789 /* 790 * Load the media dependent parameters 791 * includes: media_blksize,media_density,numblks 792 * As we have a tape in, it should be reflected here. 793 * If not you may need the "quirk" above. 794 */ 795 if ((error = st_mode_sense(st, 0)) != 0) 796 return (error); 797 /* 798 * If we have gained a permanent density from somewhere, 799 * then use it in preference to the one supplied by 800 * default by the driver. 801 */ 802 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 803 st->density = st->modes[dsty].density; 804 else 805 st->density = st->media_density; 806 /* 807 * If we have gained a permanent blocksize 808 * then use it in preference to the one supplied by 809 * default by the driver. 810 */ 811 st->flags &= ~ST_FIXEDBLOCKS; 812 if (st->modeflags[dsty] & 813 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 814 st->blksize = st->modes[dsty].blksize; 815 if (st->blksize) 816 st->flags |= ST_FIXEDBLOCKS; 817 } else { 818 if ((error = st_decide_mode(st, FALSE)) != 0) 819 return (error); 820 } 821 if ((error = st_mode_select(st, 0)) != 0) { 822 printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); 823 return (error); 824 } 825 scsipi_prevent(sc_link, PR_PREVENT, 826 SCSI_IGNORE_ILLEGAL_REQUEST | SCSI_IGNORE_NOT_READY); 827 st->flags &= ~ST_NEW_MOUNT; 828 st->flags |= ST_MOUNTED; 829 sc_link->flags |= SDEV_MEDIA_LOADED; /* move earlier? */ 830 831 return (0); 832 } 833 834 /* 835 * End the present mount session. 836 * Rewind, and optionally eject the tape. 837 * Reset various flags to indicate that all new 838 * operations require another mount operation 839 */ 840 void 841 st_unmount(st, eject) 842 struct st_softc *st; 843 boolean eject; 844 { 845 struct scsipi_link *sc_link = st->sc_link; 846 int nmarks; 847 848 if (!(st->flags & ST_MOUNTED)) 849 return; 850 SC_DEBUG(sc_link, SDEV_DB1, ("unmounting\n")); 851 st_check_eod(st, FALSE, &nmarks, SCSI_IGNORE_NOT_READY); 852 st_rewind(st, 0, SCSI_IGNORE_NOT_READY); 853 scsipi_prevent(sc_link, PR_ALLOW, 854 SCSI_IGNORE_ILLEGAL_REQUEST | SCSI_IGNORE_NOT_READY); 855 if (eject) 856 st_load(st, LD_UNLOAD, SCSI_IGNORE_NOT_READY); 857 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 858 sc_link->flags &= ~SDEV_MEDIA_LOADED; 859 } 860 861 /* 862 * Given all we know about the device, media, mode, 'quirks' and 863 * initial operation, make a decision as to how we should be set 864 * to run (regarding blocking and EOD marks) 865 */ 866 int 867 st_decide_mode(st, first_read) 868 struct st_softc *st; 869 boolean first_read; 870 { 871 #ifdef SCSIDEBUG 872 struct scsipi_link *sc_link = st->sc_link; 873 #endif 874 875 SC_DEBUG(sc_link, SDEV_DB2, ("starting block mode decision\n")); 876 877 /* 878 * If the drive can only handle fixed-length blocks and only at 879 * one size, perhaps we should just do that. 880 */ 881 if (st->blkmin && (st->blkmin == st->blkmax)) { 882 st->flags |= ST_FIXEDBLOCKS; 883 st->blksize = st->blkmin; 884 SC_DEBUG(sc_link, SDEV_DB3, 885 ("blkmin == blkmax of %d\n", st->blkmin)); 886 goto done; 887 } 888 /* 889 * If the tape density mandates (or even suggests) use of fixed 890 * or variable-length blocks, comply. 891 */ 892 switch (st->density) { 893 case HALFINCH_800: 894 case HALFINCH_1600: 895 case HALFINCH_6250: 896 case DDS: 897 st->flags &= ~ST_FIXEDBLOCKS; 898 st->blksize = 0; 899 SC_DEBUG(sc_link, SDEV_DB3, ("density specified variable\n")); 900 goto done; 901 case QIC_11: 902 case QIC_24: 903 case QIC_120: 904 case QIC_150: 905 case QIC_525: 906 case QIC_1320: 907 st->flags |= ST_FIXEDBLOCKS; 908 if (st->media_blksize > 0) 909 st->blksize = st->media_blksize; 910 else 911 st->blksize = DEF_FIXED_BSIZE; 912 SC_DEBUG(sc_link, SDEV_DB3, ("density specified fixed\n")); 913 goto done; 914 } 915 /* 916 * If we're about to read the tape, perhaps we should choose 917 * fixed or variable-length blocks and block size according to 918 * what the drive found on the tape. 919 */ 920 if (first_read && 921 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 922 (st->media_blksize == DEF_FIXED_BSIZE) || 923 (st->media_blksize == 1024))) { 924 if (st->media_blksize > 0) 925 st->flags |= ST_FIXEDBLOCKS; 926 else 927 st->flags &= ~ST_FIXEDBLOCKS; 928 st->blksize = st->media_blksize; 929 SC_DEBUG(sc_link, SDEV_DB3, 930 ("Used media_blksize of %d\n", st->media_blksize)); 931 goto done; 932 } 933 /* 934 * We're getting no hints from any direction. Choose variable- 935 * length blocks arbitrarily. 936 */ 937 st->flags &= ~ST_FIXEDBLOCKS; 938 st->blksize = 0; 939 SC_DEBUG(sc_link, SDEV_DB3, 940 ("Give up and default to variable mode\n")); 941 942 done: 943 /* 944 * Decide whether or not to write two file marks to signify end- 945 * of-data. Make the decision as a function of density. If 946 * the decision is not to use a second file mark, the SCSI BLANK 947 * CHECK condition code will be recognized as end-of-data when 948 * first read. 949 * (I think this should be a by-product of fixed/variable..julian) 950 */ 951 switch (st->density) { 952 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 953 case QIC_11: 954 case QIC_24: 955 case QIC_120: 956 case QIC_150: 957 case QIC_525: 958 case QIC_1320: 959 st->flags &= ~ST_2FM_AT_EOD; 960 break; 961 default: 962 st->flags |= ST_2FM_AT_EOD; 963 } 964 return (0); 965 } 966 967 /* 968 * Actually translate the requested transfer into 969 * one the physical driver can understand 970 * The transfer is described by a buf and will include 971 * only one physical transfer. 972 */ 973 void 974 ststrategy(bp) 975 struct buf *bp; 976 { 977 struct st_softc *st = st_cd.cd_devs[STUNIT(bp->b_dev)]; 978 struct buf *dp; 979 int s; 980 981 SC_DEBUG(st->sc_link, SDEV_DB1, 982 ("ststrategy %ld bytes @ blk %d\n", bp->b_bcount, bp->b_blkno)); 983 /* 984 * If it's a null transfer, return immediatly 985 */ 986 if (bp->b_bcount == 0) 987 goto done; 988 /* 989 * Odd sized request on fixed drives are verboten 990 */ 991 if (st->flags & ST_FIXEDBLOCKS) { 992 if (bp->b_bcount % st->blksize) { 993 printf("%s: bad request, must be multiple of %d\n", 994 st->sc_dev.dv_xname, st->blksize); 995 bp->b_error = EIO; 996 goto bad; 997 } 998 } 999 /* 1000 * as are out-of-range requests on variable drives. 1001 */ 1002 else if (bp->b_bcount < st->blkmin || 1003 (st->blkmax && bp->b_bcount > st->blkmax)) { 1004 printf("%s: bad request, must be between %d and %d\n", 1005 st->sc_dev.dv_xname, st->blkmin, st->blkmax); 1006 bp->b_error = EIO; 1007 goto bad; 1008 } 1009 s = splbio(); 1010 1011 /* 1012 * Place it in the queue of activities for this tape 1013 * at the end (a bit silly because we only have on user.. 1014 * (but it could fork())) 1015 */ 1016 dp = &st->buf_queue; 1017 bp->b_actf = NULL; 1018 bp->b_actb = dp->b_actb; 1019 *dp->b_actb = bp; 1020 dp->b_actb = &bp->b_actf; 1021 1022 /* 1023 * Tell the device to get going on the transfer if it's 1024 * not doing anything, otherwise just wait for completion 1025 * (All a bit silly if we're only allowing 1 open but..) 1026 */ 1027 ststart(st); 1028 1029 splx(s); 1030 return; 1031 bad: 1032 bp->b_flags |= B_ERROR; 1033 done: 1034 /* 1035 * Correctly set the buf to indicate a completed xfer 1036 */ 1037 bp->b_resid = bp->b_bcount; 1038 biodone(bp); 1039 return; 1040 } 1041 1042 /* 1043 * ststart looks to see if there is a buf waiting for the device 1044 * and that the device is not already busy. If both are true, 1045 * It dequeues the buf and creates a scsi command to perform the 1046 * transfer required. The transfer request will call scsipi_done 1047 * on completion, which will in turn call this routine again 1048 * so that the next queued transfer is performed. 1049 * The bufs are queued by the strategy routine (ststrategy) 1050 * 1051 * This routine is also called after other non-queued requests 1052 * have been made of the scsi driver, to ensure that the queue 1053 * continues to be drained. 1054 * ststart() is called at splbio 1055 */ 1056 void 1057 ststart(v) 1058 void *v; 1059 { 1060 struct st_softc *st = v; 1061 struct scsipi_link *sc_link = st->sc_link; 1062 register struct buf *bp, *dp; 1063 struct scsi_rw_tape cmd; 1064 int flags; 1065 1066 SC_DEBUG(sc_link, SDEV_DB2, ("ststart ")); 1067 /* 1068 * See if there is a buf to do and we are not already 1069 * doing one 1070 */ 1071 while (sc_link->openings > 0) { 1072 /* if a special awaits, let it proceed first */ 1073 if (sc_link->flags & SDEV_WAITING) { 1074 sc_link->flags &= ~SDEV_WAITING; 1075 wakeup((caddr_t)sc_link); 1076 return; 1077 } 1078 1079 dp = &st->buf_queue; 1080 if ((bp = dp->b_actf) == NULL) 1081 return; 1082 if ((dp = bp->b_actf) != NULL) 1083 dp->b_actb = bp->b_actb; 1084 else 1085 st->buf_queue.b_actb = bp->b_actb; 1086 *bp->b_actb = dp; 1087 1088 /* 1089 * if the device has been unmounted byt the user 1090 * then throw away all requests until done 1091 */ 1092 if (!(st->flags & ST_MOUNTED) || 1093 !(sc_link->flags & SDEV_MEDIA_LOADED)) { 1094 /* make sure that one implies the other.. */ 1095 sc_link->flags &= ~SDEV_MEDIA_LOADED; 1096 bp->b_flags |= B_ERROR; 1097 bp->b_error = EIO; 1098 bp->b_resid = bp->b_bcount; 1099 biodone(bp); 1100 continue; 1101 } 1102 /* 1103 * only FIXEDBLOCK devices have pending I/O or space operations. 1104 */ 1105 if (st->flags & ST_FIXEDBLOCKS) { 1106 /* 1107 * If we are at a filemark but have not reported it yet 1108 * then we should report it now 1109 */ 1110 if (st->flags & ST_AT_FILEMARK) { 1111 if ((bp->b_flags & B_READ) == B_WRITE) { 1112 /* 1113 * Handling of ST_AT_FILEMARK in 1114 * st_space will fill in the right file 1115 * mark count. 1116 * Back up over filemark 1117 */ 1118 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1119 bp->b_flags |= B_ERROR; 1120 bp->b_error = EIO; 1121 biodone(bp); 1122 continue; 1123 } 1124 } else { 1125 bp->b_resid = bp->b_bcount; 1126 bp->b_error = 0; 1127 bp->b_flags &= ~B_ERROR; 1128 st->flags &= ~ST_AT_FILEMARK; 1129 biodone(bp); 1130 continue; /* seek more work */ 1131 } 1132 } 1133 } 1134 /* 1135 * If we are at EOM but have not reported it 1136 * yet then we should report it now. 1137 */ 1138 if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { 1139 bp->b_resid = bp->b_bcount; 1140 if (st->flags & ST_EIO_PENDING) { 1141 bp->b_error = EIO; 1142 bp->b_flags |= B_ERROR; 1143 } 1144 st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); 1145 biodone(bp); 1146 continue; /* seek more work */ 1147 } 1148 1149 /* 1150 * Fill out the scsi command 1151 */ 1152 bzero(&cmd, sizeof(cmd)); 1153 if ((bp->b_flags & B_READ) == B_WRITE) { 1154 cmd.opcode = WRITE; 1155 st->flags &= ~ST_FM_WRITTEN; 1156 flags = SCSI_DATA_OUT; 1157 } else { 1158 cmd.opcode = READ; 1159 flags = SCSI_DATA_IN; 1160 } 1161 1162 /* 1163 * Handle "fixed-block-mode" tape drives by using the 1164 * block count instead of the length. 1165 */ 1166 if (st->flags & ST_FIXEDBLOCKS) { 1167 cmd.byte2 |= SRW_FIXED; 1168 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1169 } else 1170 _lto3b(bp->b_bcount, cmd.len); 1171 1172 /* 1173 * go ask the adapter to do all this for us 1174 */ 1175 if (scsipi_command(sc_link, 1176 (struct scsipi_generic *)&cmd, sizeof(cmd), 1177 (u_char *)bp->b_data, bp->b_bcount, 1178 0, ST_IO_TIME, bp, flags | SCSI_NOSLEEP)) 1179 printf("%s: not queued\n", st->sc_dev.dv_xname); 1180 } /* go back and see if we can cram more work in.. */ 1181 } 1182 1183 void 1184 stdone(xs) 1185 struct scsipi_xfer *xs; 1186 { 1187 1188 if (xs->bp != NULL) { 1189 struct st_softc *st = xs->sc_link->device_softc; 1190 if ((xs->bp->b_flags & B_READ) == B_WRITE) { 1191 st->flags |= ST_WRITTEN; 1192 } else { 1193 st->flags &= ~ST_WRITTEN; 1194 } 1195 #if NRND > 0 1196 rnd_add_uint32(&st->rnd_source, xs->bp->b_blkno); 1197 #endif 1198 } 1199 } 1200 1201 int 1202 stread(dev, uio, iomode) 1203 dev_t dev; 1204 struct uio *uio; 1205 int iomode; 1206 { 1207 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1208 1209 return (physio(ststrategy, NULL, dev, B_READ, 1210 st->sc_link->adapter->scsipi_minphys, uio)); 1211 } 1212 1213 int 1214 stwrite(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_WRITE, 1222 st->sc_link->adapter->scsipi_minphys, uio)); 1223 } 1224 1225 /* 1226 * Perform special action on behalf of the user; 1227 * knows about the internals of this device 1228 */ 1229 int 1230 stioctl(dev, cmd, arg, flag, p) 1231 dev_t dev; 1232 u_long cmd; 1233 caddr_t arg; 1234 int flag; 1235 struct proc *p; 1236 { 1237 int error = 0; 1238 int unit; 1239 int number, nmarks, dsty; 1240 int flags; 1241 struct st_softc *st; 1242 int hold_blksize; 1243 u_int8_t hold_density; 1244 struct mtop *mt = (struct mtop *) arg; 1245 1246 /* 1247 * Find the device that the user is talking about 1248 */ 1249 flags = 0; /* give error messages, act on errors etc. */ 1250 unit = STUNIT(dev); 1251 dsty = STDSTY(dev); 1252 st = st_cd.cd_devs[unit]; 1253 hold_blksize = st->blksize; 1254 hold_density = st->density; 1255 1256 switch ((u_int) cmd) { 1257 1258 case MTIOCGET: { 1259 struct mtget *g = (struct mtget *) arg; 1260 /* 1261 * (to get the current state of READONLY) 1262 */ 1263 error = st_mode_sense(st, SCSI_SILENT); 1264 if (error) 1265 break; 1266 SC_DEBUG(st->sc_link, SDEV_DB1, ("[ioctl: get status]\n")); 1267 bzero(g, sizeof(struct mtget)); 1268 g->mt_type = 0x7; /* Ultrix compat *//*? */ 1269 g->mt_blksiz = st->blksize; 1270 g->mt_density = st->density; 1271 g->mt_mblksiz[0] = st->modes[0].blksize; 1272 g->mt_mblksiz[1] = st->modes[1].blksize; 1273 g->mt_mblksiz[2] = st->modes[2].blksize; 1274 g->mt_mblksiz[3] = st->modes[3].blksize; 1275 g->mt_mdensity[0] = st->modes[0].density; 1276 g->mt_mdensity[1] = st->modes[1].density; 1277 g->mt_mdensity[2] = st->modes[2].density; 1278 g->mt_mdensity[3] = st->modes[3].density; 1279 if (st->flags & ST_READONLY) 1280 g->mt_dsreg |= MT_DS_RDONLY; 1281 if (st->flags & ST_MOUNTED) 1282 g->mt_dsreg |= MT_DS_MOUNTED; 1283 g->mt_resid = st->mt_resid; 1284 g->mt_erreg = st->mt_erreg; 1285 /* 1286 * clear latched errors. 1287 */ 1288 st->mt_resid = 0; 1289 st->mt_erreg = 0; 1290 break; 1291 } 1292 case MTIOCTOP: { 1293 1294 SC_DEBUG(st->sc_link, SDEV_DB1, 1295 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1296 mt->mt_count)); 1297 1298 /* compat: in U*x it is a short */ 1299 number = mt->mt_count; 1300 switch ((short) (mt->mt_op)) { 1301 case MTWEOF: /* write an end-of-file record */ 1302 error = st_write_filemarks(st, number, flags); 1303 break; 1304 case MTBSF: /* backward space file */ 1305 number = -number; 1306 case MTFSF: /* forward space file */ 1307 error = st_check_eod(st, FALSE, &nmarks, flags); 1308 if (!error) 1309 error = st_space(st, number - nmarks, 1310 SP_FILEMARKS, flags); 1311 break; 1312 case MTBSR: /* backward space record */ 1313 number = -number; 1314 case MTFSR: /* forward space record */ 1315 error = st_check_eod(st, TRUE, &nmarks, flags); 1316 if (!error) 1317 error = st_space(st, number, SP_BLKS, flags); 1318 break; 1319 case MTREW: /* rewind */ 1320 error = st_rewind(st, 0, flags); 1321 break; 1322 case MTOFFL: /* rewind and put the drive offline */ 1323 st_unmount(st, EJECT); 1324 break; 1325 case MTNOP: /* no operation, sets status only */ 1326 break; 1327 case MTRETEN: /* retension the tape */ 1328 error = st_load(st, LD_RETENSION, flags); 1329 if (!error) 1330 error = st_load(st, LD_LOAD, flags); 1331 break; 1332 case MTEOM: /* forward space to end of media */ 1333 error = st_check_eod(st, FALSE, &nmarks, flags); 1334 if (!error) 1335 error = st_space(st, 1, SP_EOM, flags); 1336 break; 1337 case MTCACHE: /* enable controller cache */ 1338 st->flags &= ~ST_DONTBUFFER; 1339 goto try_new_value; 1340 case MTNOCACHE: /* disable controller cache */ 1341 st->flags |= ST_DONTBUFFER; 1342 goto try_new_value; 1343 case MTERASE: /* erase volume */ 1344 error = st_erase(st, number, flags); 1345 break; 1346 case MTSETBSIZ: /* Set block size for device */ 1347 #ifdef NOTYET 1348 if (!(st->flags & ST_NEW_MOUNT)) { 1349 uprintf("re-mount tape before changing blocksize"); 1350 error = EINVAL; 1351 break; 1352 } 1353 #endif 1354 if (number == 0) 1355 st->flags &= ~ST_FIXEDBLOCKS; 1356 else { 1357 if ((st->blkmin || st->blkmax) && 1358 (number < st->blkmin || 1359 number > st->blkmax)) { 1360 error = EINVAL; 1361 break; 1362 } 1363 st->flags |= ST_FIXEDBLOCKS; 1364 } 1365 st->blksize = number; 1366 st->flags |= ST_BLOCK_SET; /*XXX */ 1367 goto try_new_value; 1368 1369 case MTSETDNSTY: /* Set density for device and mode */ 1370 /* 1371 * Any number >= 0 and <= 0xff is legal. Numbers 1372 * above 0x80 are 'vendor unique'. 1373 */ 1374 if (number < 0 || number > 255) { 1375 error = EINVAL; 1376 break; 1377 } else 1378 st->density = number; 1379 goto try_new_value; 1380 1381 case MTCMPRESS: 1382 error = st_cmprss(st, number); 1383 break; 1384 1385 case MTEWARN: 1386 if (number) 1387 st->flags |= ST_EARLYWARN; 1388 else 1389 st->flags &= ~ST_EARLYWARN; 1390 break; 1391 1392 default: 1393 error = EINVAL; 1394 } 1395 break; 1396 } 1397 case MTIOCIEOT: 1398 case MTIOCEEOT: 1399 break; 1400 1401 case MTIOCRDSPOS: 1402 error = st_rdpos(st, 0, (u_int32_t *) arg); 1403 break; 1404 1405 case MTIOCRDHPOS: 1406 error = st_rdpos(st, 1, (u_int32_t *) arg); 1407 break; 1408 1409 case MTIOCSLOCATE: 1410 error = st_setpos(st, 0, (u_int32_t *) arg); 1411 break; 1412 1413 case MTIOCHLOCATE: 1414 error = st_setpos(st, 1, (u_int32_t *) arg); 1415 break; 1416 1417 1418 default: 1419 error = scsipi_do_ioctl(st->sc_link, dev, cmd, arg, 1420 flag, p); 1421 break; 1422 } 1423 return (error); 1424 /*-----------------------------*/ 1425 try_new_value: 1426 /* 1427 * Check that the mode being asked for is aggreeable to the 1428 * drive. If not, put it back the way it was. 1429 */ 1430 if ((error = st_mode_select(st, 0)) != 0) {/* put it back as it was */ 1431 printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); 1432 st->density = hold_density; 1433 st->blksize = hold_blksize; 1434 if (st->blksize) 1435 st->flags |= ST_FIXEDBLOCKS; 1436 else 1437 st->flags &= ~ST_FIXEDBLOCKS; 1438 return (error); 1439 } 1440 /* 1441 * As the drive liked it, if we are setting a new default, 1442 * set it into the structures as such. 1443 * 1444 * The means for deciding this are not finalised yet- but 1445 * if the device was opened in Control Mode, the values 1446 * are persistent now across mounts. 1447 */ 1448 if (STMODE(dev) == CTRL_MODE) { 1449 switch ((short) (mt->mt_op)) { 1450 case MTSETBSIZ: 1451 st->modes[dsty].blksize = st->blksize; 1452 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1453 break; 1454 case MTSETDNSTY: 1455 st->modes[dsty].density = st->density; 1456 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1457 break; 1458 } 1459 } 1460 return (0); 1461 } 1462 1463 /* 1464 * Do a synchronous read. 1465 */ 1466 int 1467 st_read(st, buf, size, flags) 1468 struct st_softc *st; 1469 int size; 1470 int flags; 1471 char *buf; 1472 { 1473 struct scsi_rw_tape cmd; 1474 1475 /* 1476 * If it's a null transfer, return immediatly 1477 */ 1478 if (size == 0) 1479 return (0); 1480 bzero(&cmd, sizeof(cmd)); 1481 cmd.opcode = READ; 1482 if (st->flags & ST_FIXEDBLOCKS) { 1483 cmd.byte2 |= SRW_FIXED; 1484 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1485 cmd.len); 1486 } else 1487 _lto3b(size, cmd.len); 1488 return (scsipi_command(st->sc_link, 1489 (struct scsipi_generic *)&cmd, sizeof(cmd), 1490 (u_char *)buf, size, 0, ST_IO_TIME, NULL, flags | SCSI_DATA_IN)); 1491 } 1492 1493 /* 1494 * Ask the drive what it's min and max blk sizes are. 1495 */ 1496 int 1497 st_read_block_limits(st, flags) 1498 struct st_softc *st; 1499 int flags; 1500 { 1501 struct scsi_block_limits cmd; 1502 struct scsi_block_limits_data block_limits; 1503 struct scsipi_link *sc_link = st->sc_link; 1504 int error; 1505 1506 /* 1507 * First check if we have it all loaded 1508 */ 1509 if ((sc_link->flags & SDEV_MEDIA_LOADED)) 1510 return (0); 1511 1512 /* 1513 * do a 'Read Block Limits' 1514 */ 1515 bzero(&cmd, sizeof(cmd)); 1516 cmd.opcode = READ_BLOCK_LIMITS; 1517 1518 /* 1519 * do the command, update the global values 1520 */ 1521 error = scsipi_command(sc_link, (struct scsipi_generic *)&cmd, 1522 sizeof(cmd), (u_char *)&block_limits, sizeof(block_limits), 1523 ST_RETRIES, ST_CTL_TIME, NULL, flags | SCSI_DATA_IN); 1524 if (error) 1525 return (error); 1526 1527 st->blkmin = _2btol(block_limits.min_length); 1528 st->blkmax = _3btol(block_limits.max_length); 1529 1530 SC_DEBUG(sc_link, SDEV_DB3, 1531 ("(%d <= blksize <= %d)\n", st->blkmin, st->blkmax)); 1532 return (0); 1533 } 1534 1535 /* 1536 * Get the scsi driver to send a full inquiry to the 1537 * device and use the results to fill out the global 1538 * parameter structure. 1539 * 1540 * called from: 1541 * attach 1542 * open 1543 * ioctl (to reset original blksize) 1544 */ 1545 int 1546 st_mode_sense(st, flags) 1547 struct st_softc *st; 1548 int flags; 1549 { 1550 u_int scsipi_sense_len; 1551 int error; 1552 struct scsi_mode_sense cmd; 1553 struct scsipi_sense { 1554 struct scsi_mode_header header; 1555 struct scsi_blk_desc blk_desc; 1556 u_char sense_data[MAX_PAGE_0_SIZE]; 1557 } scsipi_sense; 1558 struct scsipi_link *sc_link = st->sc_link; 1559 1560 scsipi_sense_len = 12 + st->page_0_size; 1561 1562 /* 1563 * Set up a mode sense 1564 */ 1565 bzero(&cmd, sizeof(cmd)); 1566 cmd.opcode = SCSI_MODE_SENSE; 1567 cmd.length = scsipi_sense_len; 1568 1569 /* 1570 * do the command, but we don't need the results 1571 * just print them for our interest's sake, if asked, 1572 * or if we need it as a template for the mode select 1573 * store it away. 1574 */ 1575 error = scsipi_command(sc_link, (struct scsipi_generic *)&cmd, 1576 sizeof(cmd), (u_char *)&scsipi_sense, scsipi_sense_len, 1577 ST_RETRIES, ST_CTL_TIME, NULL, flags | SCSI_DATA_IN); 1578 if (error) 1579 return (error); 1580 1581 st->numblks = _3btol(scsipi_sense.blk_desc.nblocks); 1582 st->media_blksize = _3btol(scsipi_sense.blk_desc.blklen); 1583 st->media_density = scsipi_sense.blk_desc.density; 1584 if (scsipi_sense.header.dev_spec & SMH_DSP_WRITE_PROT) 1585 st->flags |= ST_READONLY; 1586 else 1587 st->flags &= ~ST_READONLY; 1588 SC_DEBUG(sc_link, SDEV_DB3, 1589 ("density code 0x%x, %d-byte blocks, write-%s, ", 1590 st->media_density, st->media_blksize, 1591 st->flags & ST_READONLY ? "protected" : "enabled")); 1592 SC_DEBUG(sc_link, SDEV_DB3, 1593 ("%sbuffered\n", 1594 scsipi_sense.header.dev_spec & SMH_DSP_BUFF_MODE ? "" : "un")); 1595 if (st->page_0_size) 1596 bcopy(scsipi_sense.sense_data, st->sense_data, 1597 st->page_0_size); 1598 sc_link->flags |= SDEV_MEDIA_LOADED; 1599 return (0); 1600 } 1601 1602 /* 1603 * Send a filled out parameter structure to the drive to 1604 * set it into the desire modes etc. 1605 */ 1606 int 1607 st_mode_select(st, flags) 1608 struct st_softc *st; 1609 int flags; 1610 { 1611 u_int scsi_select_len; 1612 struct scsi_mode_select cmd; 1613 struct scsi_select { 1614 struct scsi_mode_header header; 1615 struct scsi_blk_desc blk_desc; 1616 u_char sense_data[MAX_PAGE_0_SIZE]; 1617 } scsi_select; 1618 struct scsipi_link *sc_link = st->sc_link; 1619 1620 scsi_select_len = 12 + st->page_0_size; 1621 1622 /* 1623 * This quirk deals with drives that have only one valid mode 1624 * and think this gives them license to reject all mode selects, 1625 * even if the selected mode is the one that is supported. 1626 */ 1627 if (st->quirks & ST_Q_UNIMODAL) { 1628 SC_DEBUG(sc_link, SDEV_DB3, 1629 ("not setting density 0x%x blksize 0x%x\n", 1630 st->density, st->blksize)); 1631 return (0); 1632 } 1633 1634 /* 1635 * Set up for a mode select 1636 */ 1637 bzero(&cmd, sizeof(cmd)); 1638 cmd.opcode = SCSI_MODE_SELECT; 1639 cmd.length = scsi_select_len; 1640 1641 bzero(&scsi_select, scsi_select_len); 1642 scsi_select.header.blk_desc_len = sizeof(struct scsi_blk_desc); 1643 scsi_select.header.dev_spec &= ~SMH_DSP_BUFF_MODE; 1644 scsi_select.blk_desc.density = st->density; 1645 if (st->flags & ST_DONTBUFFER) 1646 scsi_select.header.dev_spec |= SMH_DSP_BUFF_MODE_OFF; 1647 else 1648 scsi_select.header.dev_spec |= SMH_DSP_BUFF_MODE_ON; 1649 if (st->flags & ST_FIXEDBLOCKS) 1650 _lto3b(st->blksize, scsi_select.blk_desc.blklen); 1651 if (st->page_0_size) 1652 bcopy(st->sense_data, scsi_select.sense_data, st->page_0_size); 1653 1654 /* 1655 * do the command 1656 */ 1657 return (scsipi_command(sc_link, (struct scsipi_generic *)&cmd, 1658 sizeof(cmd), (u_char *)&scsi_select, scsi_select_len, 1659 ST_RETRIES, ST_CTL_TIME, NULL, flags | SCSI_DATA_OUT)); 1660 } 1661 1662 int 1663 st_cmprss(st, onoff) 1664 struct st_softc *st; 1665 int onoff; 1666 { 1667 u_int scsi_dlen; 1668 struct scsi_mode_select mcmd; 1669 struct scsi_mode_sense scmd; 1670 struct scsi_select { 1671 struct scsi_mode_header header; 1672 struct scsi_blk_desc blk_desc; 1673 u_char pdata[max(sizeof(struct scsi_tape_dev_conf_page), 1674 sizeof(struct scsi_tape_dev_compression_page))]; 1675 } scsi_pdata; 1676 struct scsi_tape_dev_conf_page *ptr; 1677 struct scsi_tape_dev_compression_page *cptr; 1678 struct scsipi_link *sc_link = st->sc_link; 1679 int error, ison, flags; 1680 1681 scsi_dlen = sizeof(scsi_pdata); 1682 bzero(&scsi_pdata, scsi_dlen); 1683 1684 /* 1685 * Set up for a mode sense. 1686 * Do DATA COMPRESSION page first. 1687 */ 1688 bzero(&scmd, sizeof(scmd)); 1689 scmd.opcode = SCSI_MODE_SENSE; 1690 scmd.page = SMS_PAGE_CTRL_CURRENT | 0xf; 1691 scmd.length = scsi_dlen; 1692 1693 flags = SCSI_SILENT; 1694 1695 /* 1696 * Do the MODE SENSE command... 1697 */ 1698 again: 1699 bzero(&scsi_pdata, scsi_dlen); 1700 error = scsipi_command(sc_link, 1701 (struct scsipi_generic *)&scmd, sizeof(scmd), 1702 (u_char *)&scsi_pdata, scsi_dlen, 1703 ST_RETRIES, ST_CTL_TIME, NULL, flags | SCSI_DATA_IN); 1704 1705 if (error) { 1706 if (scmd.byte2 != SMS_DBD) { 1707 scmd.byte2 = SMS_DBD; 1708 goto again; 1709 } 1710 /* 1711 * Try a different page? 1712 */ 1713 if (scmd.page == (SMS_PAGE_CTRL_CURRENT | 0xf)) { 1714 scmd.page = SMS_PAGE_CTRL_CURRENT | 0x10; 1715 scmd.byte2 = 0; 1716 goto again; 1717 } 1718 return (error); 1719 } 1720 1721 if (scsi_pdata.header.blk_desc_len) 1722 ptr = (struct scsi_tape_dev_conf_page *) scsi_pdata.pdata; 1723 else 1724 ptr = (struct scsi_tape_dev_conf_page *) &scsi_pdata.blk_desc; 1725 1726 if ((scmd.page & SMS_PAGE_CODE) == 0xf) { 1727 cptr = (struct scsi_tape_dev_compression_page *) ptr; 1728 ison = (cptr->dce_dcc & DCP_DCE) != 0; 1729 if (onoff) 1730 cptr->dce_dcc |= DCP_DCE; 1731 else 1732 cptr->dce_dcc &= ~DCP_DCE; 1733 cptr->pagecode &= ~0x80; 1734 } else { 1735 ison = (ptr->sel_comp_alg != 0); 1736 if (onoff) 1737 ptr->sel_comp_alg = 1; 1738 else 1739 ptr->sel_comp_alg = 0; 1740 ptr->pagecode &= ~0x80; 1741 ptr->byte2 = 0; 1742 ptr->active_partition = 0; 1743 ptr->wb_full_ratio = 0; 1744 ptr->rb_empty_ratio = 0; 1745 ptr->byte8 &= ~0x30; 1746 ptr->gap_size = 0; 1747 ptr->byte10 &= ~0xe7; 1748 ptr->ew_bufsize[0] = 0; 1749 ptr->ew_bufsize[1] = 0; 1750 ptr->ew_bufsize[2] = 0; 1751 ptr->reserved = 0; 1752 } 1753 onoff = onoff ? 1 : 0; 1754 /* 1755 * There might be a virtue in actually doing the MODE SELECTS, 1756 * but let's not clog the bus over it. 1757 */ 1758 if (onoff == ison) 1759 return (0); 1760 1761 /* 1762 * Set up for a mode select 1763 */ 1764 1765 scsi_pdata.header.data_length = 0; 1766 scsi_pdata.header.medium_type = 0; 1767 if ((st->flags & ST_DONTBUFFER) == 0) 1768 scsi_pdata.header.dev_spec = SMH_DSP_BUFF_MODE_ON; 1769 else 1770 scsi_pdata.header.dev_spec = 0; 1771 1772 bzero(&mcmd, sizeof(mcmd)); 1773 mcmd.opcode = SCSI_MODE_SELECT; 1774 mcmd.byte2 = SMS_PF; 1775 mcmd.length = scsi_dlen; 1776 if (scsi_pdata.header.blk_desc_len) { 1777 scsi_pdata.blk_desc.density = 0; 1778 scsi_pdata.blk_desc.nblocks[0] = 0; 1779 scsi_pdata.blk_desc.nblocks[1] = 0; 1780 scsi_pdata.blk_desc.nblocks[2] = 0; 1781 } 1782 1783 /* 1784 * Do the command 1785 */ 1786 error = scsipi_command(sc_link, 1787 (struct scsipi_generic *)&mcmd, sizeof(mcmd), 1788 (u_char *)&scsi_pdata, scsi_dlen, 1789 ST_RETRIES, ST_CTL_TIME, NULL, flags | SCSI_DATA_OUT); 1790 1791 if (error && (scmd.page & SMS_PAGE_CODE) == 0xf) { 1792 /* 1793 * Try DEVICE CONFIGURATION page. 1794 */ 1795 scmd.page = SMS_PAGE_CTRL_CURRENT | 0x10; 1796 goto again; 1797 } 1798 return (error); 1799 } 1800 /* 1801 * issue an erase command 1802 */ 1803 int 1804 st_erase(st, full, flags) 1805 struct st_softc *st; 1806 int full, flags; 1807 { 1808 int tmo; 1809 struct scsi_erase cmd; 1810 1811 /* 1812 * Full erase means set LONG bit in erase command, which asks 1813 * the drive to erase the entire unit. Without this bit, we're 1814 * asking the drive to write an erase gap. 1815 */ 1816 bzero(&cmd, sizeof(cmd)); 1817 cmd.opcode = ERASE; 1818 if (full) { 1819 cmd.byte2 = SE_IMMED|SE_LONG; 1820 tmo = ST_SPC_TIME; 1821 } else { 1822 tmo = ST_IO_TIME; 1823 cmd.byte2 = SE_IMMED; 1824 } 1825 1826 /* 1827 * XXX We always do this asynchronously, for now. How long should 1828 * we wait if we want to (eventually) to it synchronously? 1829 */ 1830 return (scsipi_command(st->sc_link, 1831 (struct scsipi_generic *)&cmd, sizeof(cmd), 1832 0, 0, ST_RETRIES, tmo, NULL, flags)); 1833 } 1834 1835 /* 1836 * skip N blocks/filemarks/seq filemarks/eom 1837 */ 1838 int 1839 st_space(st, number, what, flags) 1840 struct st_softc *st; 1841 u_int what; 1842 int flags; 1843 int number; 1844 { 1845 struct scsi_space cmd; 1846 int error; 1847 1848 switch (what) { 1849 case SP_BLKS: 1850 if (st->flags & ST_PER_ACTION) { 1851 if (number > 0) { 1852 st->flags &= ~ST_PER_ACTION; 1853 return (EIO); 1854 } else if (number < 0) { 1855 if (st->flags & ST_AT_FILEMARK) { 1856 /* 1857 * Handling of ST_AT_FILEMARK 1858 * in st_space will fill in the 1859 * right file mark count. 1860 */ 1861 error = st_space(st, 0, SP_FILEMARKS, 1862 flags); 1863 if (error) 1864 return (error); 1865 } 1866 if (st->flags & ST_BLANK_READ) { 1867 st->flags &= ~ST_BLANK_READ; 1868 return (EIO); 1869 } 1870 st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); 1871 } 1872 } 1873 break; 1874 case SP_FILEMARKS: 1875 if (st->flags & ST_EIO_PENDING) { 1876 if (number > 0) { 1877 /* pretend we just discovered the error */ 1878 st->flags &= ~ST_EIO_PENDING; 1879 return (EIO); 1880 } else if (number < 0) { 1881 /* back away from the error */ 1882 st->flags &= ~ST_EIO_PENDING; 1883 } 1884 } 1885 if (st->flags & ST_AT_FILEMARK) { 1886 st->flags &= ~ST_AT_FILEMARK; 1887 number--; 1888 } 1889 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 1890 /* back away from unwritten tape */ 1891 st->flags &= ~ST_BLANK_READ; 1892 number++; /* XXX dubious */ 1893 } 1894 break; 1895 case SP_EOM: 1896 if (st->flags & ST_EOM_PENDING) { 1897 /* we're already there */ 1898 st->flags &= ~ST_EOM_PENDING; 1899 return (0); 1900 } 1901 if (st->flags & ST_EIO_PENDING) { 1902 /* pretend we just discovered the error */ 1903 st->flags &= ~ST_EIO_PENDING; 1904 return (EIO); 1905 } 1906 if (st->flags & ST_AT_FILEMARK) 1907 st->flags &= ~ST_AT_FILEMARK; 1908 break; 1909 } 1910 if (number == 0) 1911 return (0); 1912 1913 bzero(&cmd, sizeof(cmd)); 1914 cmd.opcode = SPACE; 1915 cmd.byte2 = what; 1916 _lto3b(number, cmd.number); 1917 1918 return (scsipi_command(st->sc_link, 1919 (struct scsipi_generic *)&cmd, sizeof(cmd), 1920 0, 0, 0, ST_SPC_TIME, NULL, flags)); 1921 } 1922 1923 /* 1924 * write N filemarks 1925 */ 1926 int 1927 st_write_filemarks(st, number, flags) 1928 struct st_softc *st; 1929 int flags; 1930 int number; 1931 { 1932 struct scsi_write_filemarks cmd; 1933 1934 /* 1935 * It's hard to write a negative number of file marks. 1936 * Don't try. 1937 */ 1938 if (number < 0) 1939 return (EINVAL); 1940 switch (number) { 1941 case 0: /* really a command to sync the drive's buffers */ 1942 break; 1943 case 1: 1944 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 1945 st->flags &= ~ST_WRITTEN; 1946 else 1947 st->flags |= ST_FM_WRITTEN; 1948 st->flags &= ~ST_PER_ACTION; 1949 break; 1950 default: 1951 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 1952 } 1953 1954 bzero(&cmd, sizeof(cmd)); 1955 cmd.opcode = WRITE_FILEMARKS; 1956 _lto3b(number, cmd.number); 1957 1958 return (scsipi_command(st->sc_link, 1959 (struct scsipi_generic *)&cmd, sizeof(cmd), 1960 0, 0, 0, ST_IO_TIME * 4, NULL, flags)); 1961 } 1962 1963 /* 1964 * Make sure the right number of file marks is on tape if the 1965 * tape has been written. If the position argument is true, 1966 * leave the tape positioned where it was originally. 1967 * 1968 * nmarks returns the number of marks to skip (or, if position 1969 * true, which were skipped) to get back original position. 1970 */ 1971 int 1972 st_check_eod(st, position, nmarks, flags) 1973 struct st_softc *st; 1974 boolean position; 1975 int *nmarks; 1976 int flags; 1977 { 1978 int error; 1979 1980 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 1981 default: 1982 *nmarks = 0; 1983 return (0); 1984 case ST_WRITTEN: 1985 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 1986 *nmarks = 1; 1987 break; 1988 case ST_WRITTEN | ST_2FM_AT_EOD: 1989 *nmarks = 2; 1990 } 1991 error = st_write_filemarks(st, *nmarks, flags); 1992 if (position && !error) 1993 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 1994 return (error); 1995 } 1996 1997 /* 1998 * load/unload/retension 1999 */ 2000 int 2001 st_load(st, type, flags) 2002 struct st_softc *st; 2003 u_int type; 2004 int flags; 2005 { 2006 struct scsi_load cmd; 2007 2008 if (type != LD_LOAD) { 2009 int error; 2010 int nmarks; 2011 2012 error = st_check_eod(st, FALSE, &nmarks, flags); 2013 if (error) 2014 return (error); 2015 } 2016 if (st->quirks & ST_Q_IGNORE_LOADS) { 2017 if (type == LD_LOAD) { 2018 /* 2019 * If we ignore loads, at least we should try a rewind. 2020 */ 2021 return st_rewind(st, 0, flags); 2022 } 2023 return (0); 2024 } 2025 2026 bzero(&cmd, sizeof(cmd)); 2027 cmd.opcode = LOAD; 2028 cmd.how = type; 2029 2030 return (scsipi_command(st->sc_link, 2031 (struct scsipi_generic *)&cmd, sizeof(cmd), 2032 0, 0, ST_RETRIES, ST_SPC_TIME, NULL, flags)); 2033 } 2034 2035 /* 2036 * Rewind the device 2037 */ 2038 int 2039 st_rewind(st, immediate, flags) 2040 struct st_softc *st; 2041 u_int immediate; 2042 int flags; 2043 { 2044 struct scsi_rewind cmd; 2045 int error; 2046 int nmarks; 2047 2048 error = st_check_eod(st, FALSE, &nmarks, flags); 2049 if (error) 2050 return (error); 2051 st->flags &= ~ST_PER_ACTION; 2052 2053 bzero(&cmd, sizeof(cmd)); 2054 cmd.opcode = REWIND; 2055 cmd.byte2 = immediate; 2056 2057 return (scsipi_command(st->sc_link, 2058 (struct scsipi_generic *)&cmd, sizeof(cmd), 0, 0, ST_RETRIES, 2059 immediate ? ST_CTL_TIME: ST_SPC_TIME, NULL, flags)); 2060 } 2061 2062 int 2063 st_rdpos(st, hard, blkptr) 2064 struct st_softc *st; 2065 int hard; 2066 u_int32_t *blkptr; 2067 { 2068 int error; 2069 u_int8_t posdata[20]; 2070 struct scsi_tape_read_position cmd; 2071 2072 /* 2073 * First flush any pending writes... 2074 */ 2075 error = st_write_filemarks(st, 0, SCSI_SILENT); 2076 2077 /* 2078 * The latter case is for 'write protected' tapes 2079 * which are too stupid to recognize a zero count 2080 * for writing filemarks as a no-op. 2081 */ 2082 if (error != 0 && error != EACCES) 2083 return (error); 2084 2085 bzero(&cmd, sizeof(cmd)); 2086 bzero(&posdata, sizeof(posdata)); 2087 cmd.opcode = READ_POSITION; 2088 if (hard) 2089 cmd.byte1 = 1; 2090 2091 error = scsipi_command(st->sc_link, 2092 (struct scsipi_generic *)&cmd, sizeof(cmd), (u_char *)&posdata, 2093 sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, 2094 SCSI_SILENT | SCSI_DATA_IN); 2095 2096 if (error == 0) { 2097 #if 0 2098 printf("posdata:"); 2099 for (hard = 0; hard < sizeof(posdata); hard++) 2100 printf("%02x ", posdata[hard] & 0xff); 2101 printf("\n"); 2102 #endif 2103 if (posdata[0] & 0x4) /* Block Position Unknown */ 2104 error = EINVAL; 2105 else 2106 *blkptr = _4btol(&posdata[4]); 2107 } 2108 return (error); 2109 } 2110 2111 int 2112 st_setpos(st, hard, blkptr) 2113 struct st_softc *st; 2114 int hard; 2115 u_int32_t *blkptr; 2116 { 2117 int error; 2118 struct scsi_tape_locate cmd; 2119 2120 /* 2121 * First flush any pending writes. Strictly speaking, 2122 * we're not supposed to have to worry about this, 2123 * but let's be untrusting. 2124 */ 2125 error = st_write_filemarks(st, 0, SCSI_SILENT); 2126 2127 /* 2128 * The latter case is for 'write protected' tapes 2129 * which are too stupid to recognize a zero count 2130 * for writing filemarks as a no-op. 2131 */ 2132 if (error != 0 && error != EACCES) 2133 return (error); 2134 2135 bzero(&cmd, sizeof(cmd)); 2136 cmd.opcode = LOCATE; 2137 if (hard) 2138 cmd.byte2 = 1 << 2; 2139 _lto4b(*blkptr, cmd.blkaddr); 2140 error = scsipi_command(st->sc_link, 2141 (struct scsipi_generic *)&cmd, sizeof(cmd), 2142 NULL, 0, ST_RETRIES, ST_SPC_TIME, NULL, 0); 2143 /* 2144 * XXX: Note file && block number position now unknown (if 2145 * XXX: these things ever start being maintained in this driver) 2146 */ 2147 return (error); 2148 } 2149 2150 2151 /* 2152 * Look at the returned sense and act on the error and determine 2153 * the unix error number to pass back..., 0 (== report no error), 2154 * -1 = retry the operation, -2 continue error processing. 2155 */ 2156 int 2157 st_interpret_sense(xs) 2158 struct scsipi_xfer *xs; 2159 { 2160 struct scsipi_link *sc_link = xs->sc_link; 2161 struct scsipi_sense_data *sense = &xs->sense.scsi_sense; 2162 struct buf *bp = xs->bp; 2163 struct st_softc *st = sc_link->device_softc; 2164 int retval = SCSIRET_CONTINUE; 2165 int doprint = ((xs->flags & SCSI_SILENT) == 0); 2166 u_int8_t key; 2167 int32_t info; 2168 2169 /* 2170 * If it isn't a extended or extended/deferred error, let 2171 * the generic code handle it. 2172 */ 2173 if ((sense->error_code & SSD_ERRCODE) != 0x70 && 2174 (sense->error_code & SSD_ERRCODE) != 0x71) { /* DEFFERRED */ 2175 return (retval); 2176 } 2177 2178 if (sense->error_code & SSD_ERRCODE_VALID) 2179 info = _4btol(sense->info); 2180 else 2181 info = xs->datalen; /* bad choice if fixed blocks */ 2182 key = sense->flags & SSD_KEY; 2183 st->mt_erreg = key; 2184 st->mt_resid = (short) info; 2185 2186 /* 2187 * If the device is not open yet, let generic handle 2188 */ 2189 if ((sc_link->flags & SDEV_OPEN) == 0) { 2190 return (retval); 2191 } 2192 2193 2194 if (st->flags & ST_FIXEDBLOCKS) { 2195 xs->resid = info * st->blksize; 2196 if (sense->flags & SSD_EOM) { 2197 if ((st->flags & ST_EARLYWARN) == 0) 2198 st->flags |= ST_EIO_PENDING; 2199 st->flags |= ST_EOM_PENDING; 2200 if (bp) 2201 bp->b_resid = xs->resid; 2202 } 2203 if (sense->flags & SSD_FILEMARK) { 2204 st->flags |= ST_AT_FILEMARK; 2205 if (bp) 2206 bp->b_resid = xs->resid; 2207 } 2208 if (sense->flags & SSD_ILI) { 2209 st->flags |= ST_EIO_PENDING; 2210 if (bp) 2211 bp->b_resid = xs->resid; 2212 if (sense->error_code & SSD_ERRCODE_VALID && 2213 (xs->flags & SCSI_SILENT) == 0) 2214 printf("%s: block wrong size, %d blocks " 2215 "residual\n", st->sc_dev.dv_xname, info); 2216 2217 /* 2218 * This quirk code helps the drive read 2219 * the first tape block, regardless of 2220 * format. That is required for these 2221 * drives to return proper MODE SENSE 2222 * information. 2223 */ 2224 if ((st->quirks & ST_Q_SENSE_HELP) && 2225 !(sc_link->flags & SDEV_MEDIA_LOADED)) 2226 st->blksize -= 512; 2227 } 2228 /* 2229 * If data wanted and no data was tranfered, do it immediatly 2230 */ 2231 if (xs->datalen && xs->resid >= xs->datalen) { 2232 if (st->flags & ST_EIO_PENDING) 2233 return (EIO); 2234 if (st->flags & ST_AT_FILEMARK) { 2235 if (bp) 2236 bp->b_resid = xs->resid; 2237 return (SCSIRET_NOERROR); 2238 } 2239 } 2240 } else { /* must be variable mode */ 2241 if (sense->flags & SSD_EOM) { 2242 /* 2243 * The current semantics of this 2244 * driver requires EOM detection 2245 * to return EIO unless early 2246 * warning detection is enabled 2247 * for variable mode (this is always 2248 * on for fixed block mode). 2249 */ 2250 if (st->flags & ST_EARLYWARN) { 2251 st->flags |= ST_EOM_PENDING; 2252 retval = SCSIRET_NOERROR; 2253 } else { 2254 retval = EIO; 2255 } 2256 2257 /* 2258 * If it's an unadorned EOM detection, 2259 * suppress printing an error. 2260 */ 2261 if (key == SKEY_NO_SENSE) { 2262 doprint = 0; 2263 } 2264 } else if (sense->flags & SSD_FILEMARK) { 2265 retval = SCSIRET_NOERROR; 2266 } else if (sense->flags & SSD_ILI) { 2267 if (info < 0) { 2268 /* 2269 * The tape record was bigger than the read 2270 * we issued. 2271 */ 2272 if ((xs->flags & SCSI_SILENT) == 0) { 2273 printf("%s: %d-byte tape record too big" 2274 " for %d-byte user buffer\n", 2275 st->sc_dev.dv_xname, 2276 xs->datalen - info, xs->datalen); 2277 } 2278 retval = EIO; 2279 } else { 2280 retval = SCSIRET_NOERROR; 2281 } 2282 } 2283 xs->resid = info; 2284 if (bp) 2285 bp->b_resid = info; 2286 } 2287 2288 #ifndef SCSIDEBUG 2289 if (retval == SCSIRET_NOERROR && key == SKEY_NO_SENSE) { 2290 doprint = 0; 2291 } 2292 #endif 2293 if (key == SKEY_BLANK_CHECK) { 2294 /* 2295 * This quirk code helps the drive read the 2296 * first tape block, regardless of format. That 2297 * is required for these drives to return proper 2298 * MODE SENSE information. 2299 */ 2300 if ((st->quirks & ST_Q_SENSE_HELP) && 2301 !(sc_link->flags & SDEV_MEDIA_LOADED)) { 2302 /* still starting */ 2303 st->blksize -= 512; 2304 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 2305 st->flags |= ST_BLANK_READ; 2306 xs->resid = xs->datalen; 2307 if (bp) { 2308 bp->b_resid = xs->resid; 2309 /* return an EOF */ 2310 } 2311 retval = SCSIRET_NOERROR; 2312 } 2313 } 2314 #ifdef SCSIVERBOSE 2315 if (doprint) { 2316 scsipi_print_sense(xs, 0); 2317 } 2318 #else 2319 if (doprint) { 2320 xs->sc_link->sc_print_addr(xs->sc_link); 2321 printf("Sense Key 0x%02x", key); 2322 if ((sense->error_code & SSD_ERRCODE_VALID) != 0) { 2323 switch (key) { 2324 case SKEY_NOT_READY: 2325 case SKEY_ILLEGAL_REQUEST: 2326 case SKEY_UNIT_ATTENTION: 2327 case SKEY_WRITE_PROTECT: 2328 break; 2329 case SKEY_BLANK_CHECK: 2330 printf(", requested size: %d (decimal)", info); 2331 break; 2332 case SKEY_ABORTED_COMMAND: 2333 if (xs->retries) 2334 printf(", retrying"); 2335 printf(", cmd 0x%x, info 0x%x", 2336 xs->cmd->opcode, info); 2337 break; 2338 default: 2339 printf(", info = %d (decimal)", info); 2340 } 2341 } 2342 if (sense->extra_len != 0) { 2343 int n; 2344 printf(", data ="); 2345 for (n = 0; n < sense->extra_len; n++) 2346 printf(" %02x", sense->cmd_spec_info[n]); 2347 } 2348 printf("\n"); 2349 } 2350 #endif 2351 return (retval); 2352 } 2353 2354 /* 2355 * The quirk here is that the drive returns some value to st_mode_sense 2356 * incorrectly until the tape has actually passed by the head. 2357 * 2358 * The method is to set the drive to large fixed-block state (user-specified 2359 * density and 1024-byte blocks), then read and rewind to get it to sense the 2360 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 2361 * work, as a last resort, try variable- length blocks. The result will be 2362 * the ability to do an accurate st_mode_sense. 2363 * 2364 * We know we can do a rewind because we just did a load, which implies rewind. 2365 * Rewind seems preferable to space backward if we have a virgin tape. 2366 * 2367 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 2368 * error processing, both part of st_interpret_sense. 2369 */ 2370 int 2371 st_touch_tape(st) 2372 struct st_softc *st; 2373 { 2374 char *buf; 2375 int readsize; 2376 int error; 2377 2378 buf = malloc(1024, M_TEMP, M_NOWAIT); 2379 if (buf == NULL) 2380 return (ENOMEM); 2381 2382 if ((error = st_mode_sense(st, 0)) != 0) 2383 goto bad; 2384 st->blksize = 1024; 2385 do { 2386 switch (st->blksize) { 2387 case 512: 2388 case 1024: 2389 readsize = st->blksize; 2390 st->flags |= ST_FIXEDBLOCKS; 2391 break; 2392 default: 2393 readsize = 1; 2394 st->flags &= ~ST_FIXEDBLOCKS; 2395 } 2396 if ((error = st_mode_select(st, 0)) != 0) 2397 goto bad; 2398 st_read(st, buf, readsize, SCSI_SILENT); /* XXX */ 2399 if ((error = st_rewind(st, 0, 0)) != 0) { 2400 bad: free(buf, M_TEMP); 2401 return (error); 2402 } 2403 } while (readsize != 1 && readsize > st->blksize); 2404 2405 free(buf, M_TEMP); 2406 return (0); 2407 } 2408 2409 int 2410 stdump(dev, blkno, va, size) 2411 dev_t dev; 2412 daddr_t blkno; 2413 caddr_t va; 2414 size_t size; 2415 { 2416 2417 /* Not implemented. */ 2418 return (ENXIO); 2419 } 2420
Indexes created Sun Sep 21 20:09:37 GMT 2025