st.c revision 1.114.2.4
1 /* $NetBSD: st.c,v 1.114.2.4 2000/11/20 09:59:29 bouyer 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 #include <sys/kernel.h> 76 #if NRND > 0 77 #include <sys/rnd.h> 78 #endif 79 80 #include <dev/scsipi/scsipi_all.h> 81 #include <dev/scsipi/scsi_all.h> 82 #include <dev/scsipi/scsi_tape.h> 83 #include <dev/scsipi/scsiconf.h> 84 85 /* Defines for device specific stuff */ 86 #define DEF_FIXED_BSIZE 512 87 #define ST_RETRIES 4 /* only on non IO commands */ 88 89 #define STMODE(z) ( minor(z) & 0x03) 90 #define STDSTY(z) ((minor(z) >> 2) & 0x03) 91 #define STUNIT(z) ((minor(z) >> 4) ) 92 93 #define NORMAL_MODE 0 94 #define NOREW_MODE 1 95 #define EJECT_MODE 2 96 #define CTRL_MODE 3 97 98 #define FALSE 0 99 #define TRUE 1 100 101 #define ST_IO_TIME (3 * 60 * 1000) /* 3 minutes */ 102 #define ST_CTL_TIME (30 * 1000) /* 30 seconds */ 103 #define ST_SPC_TIME (4 * 60 * 60 * 1000) /* 4 hours */ 104 105 #ifndef ST_MOUNT_DELAY 106 #define ST_MOUNT_DELAY 0 107 #endif 108 109 /* 110 * Define various devices that we know mis-behave in some way, 111 * and note how they are bad, so we can correct for them 112 */ 113 struct modes { 114 u_int quirks; /* same definitions as in quirkdata */ 115 int blksize; 116 u_int8_t density; 117 }; 118 119 struct quirkdata { 120 u_int quirks; 121 #define ST_Q_FORCE_BLKSIZE 0x0001 122 #define ST_Q_SENSE_HELP 0x0002 /* must do READ for good MODE SENSE */ 123 #define ST_Q_IGNORE_LOADS 0x0004 124 #define ST_Q_BLKSIZE 0x0008 /* variable-block media_blksize > 0 */ 125 #define ST_Q_UNIMODAL 0x0010 /* unimode drive rejects mode select */ 126 #define ST_Q_NOPREVENT 0x0020 /* does not support PREVENT */ 127 u_int page_0_size; 128 #define MAX_PAGE_0_SIZE 64 129 struct modes modes[4]; 130 }; 131 132 struct st_quirk_inquiry_pattern { 133 struct scsipi_inquiry_pattern pattern; 134 struct quirkdata quirkdata; 135 }; 136 137 struct st_quirk_inquiry_pattern st_quirk_patterns[] = { 138 {{T_SEQUENTIAL, T_REMOV, 139 " ", " ", " "}, {0, 0, { 140 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 141 {ST_Q_FORCE_BLKSIZE, 512, QIC_24}, /* minor 4-7 */ 142 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_1600}, /* minor 8-11 */ 143 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_6250} /* minor 12-15 */ 144 }}}, 145 {{T_SEQUENTIAL, T_REMOV, 146 "TANDBERG", " TDC 3600 ", ""}, {0, 12, { 147 {0, 0, 0}, /* minor 0-3 */ 148 {ST_Q_FORCE_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 149 {0, 0, QIC_150}, /* minor 8-11 */ 150 {0, 0, QIC_120} /* minor 12-15 */ 151 }}}, 152 {{T_SEQUENTIAL, T_REMOV, 153 "TANDBERG", " TDC 3800 ", ""}, {0, 0, { 154 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 155 {0, 0, QIC_525}, /* minor 4-7 */ 156 {0, 0, QIC_150}, /* minor 8-11 */ 157 {0, 0, QIC_120} /* minor 12-15 */ 158 }}}, 159 /* 160 * lacking a manual for the 4200, it's not clear what the 161 * specific density codes should be- the device is a 2.5GB 162 * capable QIC drive, those density codes aren't readily 163 * availabel. The 'default' will just have to do. 164 */ 165 {{T_SEQUENTIAL, T_REMOV, 166 "TANDBERG", " TDC 4200 ", ""}, {0, 0, { 167 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 168 {0, 0, QIC_525}, /* minor 4-7 */ 169 {0, 0, QIC_150}, /* minor 8-11 */ 170 {0, 0, QIC_120} /* minor 12-15 */ 171 }}}, 172 /* 173 * At least -005 and -007 need this. I'll assume they all do unless I 174 * hear otherwise. - mycroft, 31MAR1994 175 */ 176 {{T_SEQUENTIAL, T_REMOV, 177 "ARCHIVE ", "VIPER 2525 25462", ""}, {0, 0, { 178 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 179 {ST_Q_SENSE_HELP, 0, QIC_525}, /* minor 4-7 */ 180 {0, 0, QIC_150}, /* minor 8-11 */ 181 {0, 0, QIC_120} /* minor 12-15 */ 182 }}}, 183 /* 184 * One user reports that this works for his tape drive. It probably 185 * needs more work. - mycroft, 09APR1994 186 */ 187 {{T_SEQUENTIAL, T_REMOV, 188 "SANKYO ", "CP525 ", ""}, {0, 0, { 189 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 190 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 191 {0, 0, QIC_150}, /* minor 8-11 */ 192 {0, 0, QIC_120} /* minor 12-15 */ 193 }}}, 194 {{T_SEQUENTIAL, T_REMOV, 195 "ANRITSU ", "DMT780 ", ""}, {0, 0, { 196 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 197 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 198 {0, 0, QIC_150}, /* minor 8-11 */ 199 {0, 0, QIC_120} /* minor 12-15 */ 200 }}}, 201 {{T_SEQUENTIAL, T_REMOV, 202 "ARCHIVE ", "VIPER 150 21247", ""}, {0, 12, { 203 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 204 {0, 0, QIC_150}, /* minor 4-7 */ 205 {0, 0, QIC_120}, /* minor 8-11 */ 206 {0, 0, QIC_24} /* minor 12-15 */ 207 }}}, 208 {{T_SEQUENTIAL, T_REMOV, 209 "ARCHIVE ", "VIPER 150 21531", ""}, {0, 12, { 210 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 211 {0, 0, QIC_150}, /* minor 4-7 */ 212 {0, 0, QIC_120}, /* minor 8-11 */ 213 {0, 0, QIC_24} /* minor 12-15 */ 214 }}}, 215 {{T_SEQUENTIAL, T_REMOV, 216 "WANGTEK ", "5099ES SCSI", ""}, {0, 0, { 217 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 218 {0, 0, QIC_11}, /* minor 4-7 */ 219 {0, 0, QIC_24}, /* minor 8-11 */ 220 {0, 0, QIC_24} /* minor 12-15 */ 221 }}}, 222 {{T_SEQUENTIAL, T_REMOV, 223 "WANGTEK ", "5150ES SCSI", ""}, {0, 0, { 224 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 225 {0, 0, QIC_24}, /* minor 4-7 */ 226 {0, 0, QIC_120}, /* minor 8-11 */ 227 {0, 0, QIC_150} /* minor 12-15 */ 228 }}}, 229 {{T_SEQUENTIAL, T_REMOV, 230 "WANGTEK ", "5525ES SCSI REV7", ""}, {0, 0, { 231 {0, 0, 0}, /* minor 0-3 */ 232 {ST_Q_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 233 {0, 0, QIC_150}, /* minor 8-11 */ 234 {0, 0, QIC_120} /* minor 12-15 */ 235 }}}, 236 {{T_SEQUENTIAL, T_REMOV, 237 "WangDAT ", "Model 1300 ", ""}, {0, 0, { 238 {0, 0, 0}, /* minor 0-3 */ 239 {ST_Q_FORCE_BLKSIZE, 512, DDS}, /* minor 4-7 */ 240 {ST_Q_FORCE_BLKSIZE, 1024, DDS}, /* minor 8-11 */ 241 {ST_Q_FORCE_BLKSIZE, 0, DDS} /* minor 12-15 */ 242 }}}, 243 {{T_SEQUENTIAL, T_REMOV, 244 "EXABYTE ", "EXB-8200 ", "263H"}, {0, 5, { 245 {0, 0, 0}, /* minor 0-3 */ 246 {0, 0, 0}, /* minor 4-7 */ 247 {0, 0, 0}, /* minor 8-11 */ 248 {0, 0, 0} /* minor 12-15 */ 249 }}}, 250 {{T_SEQUENTIAL, T_REMOV, 251 "STK", "9490", ""}, 252 {ST_Q_FORCE_BLKSIZE, 0, { 253 {0, 0, 0}, /* minor 0-3 */ 254 {0, 0, 0}, /* minor 4-7 */ 255 {0, 0, 0}, /* minor 8-11 */ 256 {0, 0, 0} /* minor 12-15 */ 257 }}}, 258 {{T_SEQUENTIAL, T_REMOV, 259 "STK", "SD-3", ""}, 260 {ST_Q_FORCE_BLKSIZE, 0, { 261 {0, 0, 0}, /* minor 0-3 */ 262 {0, 0, 0}, /* minor 4-7 */ 263 {0, 0, 0}, /* minor 8-11 */ 264 {0, 0, 0} /* minor 12-15 */ 265 }}}, 266 {{T_SEQUENTIAL, T_REMOV, 267 "IBM", "03590", ""}, {ST_Q_IGNORE_LOADS, 0, { 268 {0, 0, 0}, /* minor 0-3 */ 269 {0, 0, 0}, /* minor 4-7 */ 270 {0, 0, 0}, /* minor 8-11 */ 271 {0, 0, 0} /* minor 12-15 */ 272 }}}, 273 {{T_SEQUENTIAL, T_REMOV, 274 "HP ", "T4000s ", ""}, {ST_Q_UNIMODAL, 0, { 275 {0, 0, QIC_3095}, /* minor 0-3 */ 276 {0, 0, QIC_3095}, /* minor 4-7 */ 277 {0, 0, QIC_3095}, /* minor 8-11 */ 278 {0, 0, QIC_3095}, /* minor 12-15 */ 279 }}}, 280 #if 0 281 {{T_SEQUENTIAL, T_REMOV, 282 "EXABYTE ", "EXB-8200 ", ""}, {0, 12, { 283 {0, 0, 0}, /* minor 0-3 */ 284 {0, 0, 0}, /* minor 4-7 */ 285 {0, 0, 0}, /* minor 8-11 */ 286 {0, 0, 0} /* minor 12-15 */ 287 }}}, 288 #endif 289 {{T_SEQUENTIAL, T_REMOV, 290 "TEAC ", "MT-2ST/N50 ", ""}, {ST_Q_IGNORE_LOADS, 0, { 291 {0, 0, 0}, /* minor 0-3 */ 292 {0, 0, 0}, /* minor 4-7 */ 293 {0, 0, 0}, /* minor 8-11 */ 294 {0, 0, 0} /* minor 12-15 */ 295 }}}, 296 {{T_SEQUENTIAL, T_REMOV, 297 "OnStream", "ADR50 Drive", ""}, {ST_Q_UNIMODAL, 0, { 298 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 299 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 4-7 */ 300 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 8-11 */ 301 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 12-15 */ 302 }}}, 303 {{T_SEQUENTIAL, T_REMOV, 304 "NCR H621", "0-STD-03-46F880 ", ""}, {ST_Q_NOPREVENT, 0, { 305 {0, 0, 0}, /* minor 0-3 */ 306 {0, 0, 0}, /* minor 4-7 */ 307 {0, 0, 0}, /* minor 8-11 */ 308 {0, 0, 0} /* minor 12-15 */ 309 }}}, 310 }; 311 312 #define NOEJECT 0 313 #define EJECT 1 314 315 struct st_softc { 316 struct device sc_dev; 317 /*--------------------present operating parameters, flags etc.---------------*/ 318 int flags; /* see below */ 319 u_int quirks; /* quirks for the open mode */ 320 int blksize; /* blksize we are using */ 321 u_int8_t density; /* present density */ 322 u_int page_0_size; /* size of page 0 data */ 323 u_int last_dsty; /* last density opened */ 324 short mt_resid; /* last (short) resid */ 325 short mt_erreg; /* last error (sense key) seen */ 326 #define mt_key mt_erreg 327 u_int8_t asc; /* last asc code seen */ 328 u_int8_t ascq; /* last asc code seen */ 329 /*--------------------device/scsi parameters---------------------------------*/ 330 struct scsipi_periph *sc_periph;/* our link to the adpter etc. */ 331 /*--------------------parameters reported by the device ---------------------*/ 332 int blkmin; /* min blk size */ 333 int blkmax; /* max blk size */ 334 struct quirkdata *quirkdata; /* if we have a rogue entry */ 335 /*--------------------parameters reported by the device for this media-------*/ 336 u_long numblks; /* nominal blocks capacity */ 337 int media_blksize; /* 0 if not ST_FIXEDBLOCKS */ 338 u_int8_t media_density; /* this is what it said when asked */ 339 /*--------------------quirks for the whole drive-----------------------------*/ 340 u_int drive_quirks; /* quirks of this drive */ 341 /*--------------------How we should set up when opening each minor device----*/ 342 struct modes modes[4]; /* plus more for each mode */ 343 u_int8_t modeflags[4]; /* flags for the modes */ 344 #define DENSITY_SET_BY_USER 0x01 345 #define DENSITY_SET_BY_QUIRK 0x02 346 #define BLKSIZE_SET_BY_USER 0x04 347 #define BLKSIZE_SET_BY_QUIRK 0x08 348 /*--------------------storage for sense data returned by the drive-----------*/ 349 u_char sense_data[MAX_PAGE_0_SIZE]; /* 350 * additional sense data needed 351 * for mode sense/select. 352 */ 353 struct buf_queue buf_queue; /* the queue of pending IO */ 354 /* operations */ 355 #if NRND > 0 356 rndsource_element_t rnd_source; 357 #endif 358 }; 359 360 361 int stmatch __P((struct device *, struct cfdata *, void *)); 362 void stattach __P((struct device *, struct device *, void *)); 363 void st_identify_drive __P((struct st_softc *, 364 struct scsipi_inquiry_pattern *)); 365 void st_loadquirks __P((struct st_softc *)); 366 int st_mount_tape __P((struct st_softc *, int, int)); 367 void st_unmount __P((struct st_softc *, boolean)); 368 int st_decide_mode __P((struct st_softc *, boolean)); 369 void ststart __P((struct scsipi_periph *)); 370 void stdone __P((struct scsipi_xfer *)); 371 int st_read __P((struct st_softc *, char *, int, int)); 372 int st_read_block_limits __P((struct st_softc *, int)); 373 int st_mode_sense __P((struct st_softc *, int)); 374 int st_mode_select __P((struct st_softc *, int)); 375 int st_cmprss __P((struct st_softc *, int)); 376 int st_space __P((struct st_softc *, int, u_int, int)); 377 int st_write_filemarks __P((struct st_softc *, int, int)); 378 int st_check_eod __P((struct st_softc *, boolean, int *, int)); 379 int st_load __P((struct st_softc *, u_int, int)); 380 int st_rewind __P((struct st_softc *, u_int, int)); 381 int st_interpret_sense __P((struct scsipi_xfer *)); 382 int st_touch_tape __P((struct st_softc *)); 383 int st_erase __P((struct st_softc *, int full, int flags)); 384 int st_rdpos __P((struct st_softc *, int, u_int32_t *)); 385 int st_setpos __P((struct st_softc *, int, u_int32_t *)); 386 387 struct cfattach st_ca = { 388 sizeof(struct st_softc), stmatch, stattach 389 }; 390 391 extern struct cfdriver st_cd; 392 393 const struct scsipi_periphsw st_switch = { 394 st_interpret_sense, 395 ststart, 396 NULL, 397 stdone 398 }; 399 400 #define ST_INFO_VALID 0x0001 401 #define ST_BLOCK_SET 0x0002 /* block size, mode set by ioctl */ 402 #define ST_WRITTEN 0x0004 /* data has been written, EOD needed */ 403 #define ST_FIXEDBLOCKS 0x0008 404 #define ST_AT_FILEMARK 0x0010 405 #define ST_EIO_PENDING 0x0020 /* error reporting deferred until next op */ 406 #define ST_NEW_MOUNT 0x0040 /* still need to decide mode */ 407 #define ST_READONLY 0x0080 /* st_mode_sense says write protected */ 408 #define ST_FM_WRITTEN 0x0100 /* 409 * EOF file mark written -- used with 410 * ~ST_WRITTEN to indicate that multiple file 411 * marks have been written 412 */ 413 #define ST_BLANK_READ 0x0200 /* BLANK CHECK encountered already */ 414 #define ST_2FM_AT_EOD 0x0400 /* write 2 file marks at EOD */ 415 #define ST_MOUNTED 0x0800 /* Device is presently mounted */ 416 #define ST_DONTBUFFER 0x1000 /* Disable buffering/caching */ 417 #define ST_EARLYWARN 0x2000 /* Do (deferred) EOM for variable mode */ 418 #define ST_EOM_PENDING 0x4000 /* EOM reporting deferred until next op */ 419 420 #define ST_PER_ACTION (ST_AT_FILEMARK | ST_EIO_PENDING | ST_EOM_PENDING | \ 421 ST_BLANK_READ) 422 #define ST_PER_MOUNT (ST_INFO_VALID | ST_BLOCK_SET | ST_WRITTEN | \ 423 ST_FIXEDBLOCKS | ST_READONLY | ST_FM_WRITTEN | \ 424 ST_2FM_AT_EOD | ST_PER_ACTION) 425 426 #if defined(ST_ENABLE_EARLYWARN) 427 #define ST_INIT_FLAGS ST_EARLYWARN 428 #else 429 #define ST_INIT_FLAGS 0 430 #endif 431 432 struct scsipi_inquiry_pattern st_patterns[] = { 433 {T_SEQUENTIAL, T_REMOV, 434 "", "", ""}, 435 }; 436 437 int 438 stmatch(parent, match, aux) 439 struct device *parent; 440 struct cfdata *match; 441 void *aux; 442 { 443 struct scsipibus_attach_args *sa = aux; 444 int priority; 445 446 (void)scsipi_inqmatch(&sa->sa_inqbuf, 447 (caddr_t)st_patterns, sizeof(st_patterns)/sizeof(st_patterns[0]), 448 sizeof(st_patterns[0]), &priority); 449 return (priority); 450 } 451 452 /* 453 * The routine called by the low level scsi routine when it discovers 454 * A device suitable for this driver 455 */ 456 void 457 stattach(parent, self, aux) 458 struct device *parent, *self; 459 void *aux; 460 { 461 struct st_softc *st = (void *)self; 462 struct scsipibus_attach_args *sa = aux; 463 struct scsipi_periph *periph = sa->sa_periph; 464 465 SC_DEBUG(periph, SCSIPI_DB2, ("stattach: ")); 466 467 /* 468 * Store information needed to contact our base driver 469 */ 470 st->sc_periph = periph; 471 periph->periph_dev = &st->sc_dev; 472 periph->periph_switch = &st_switch; 473 474 /* 475 * Set initial flags 476 */ 477 478 st->flags = ST_INIT_FLAGS; 479 480 /* 481 * Check if the drive is a known criminal and take 482 * Any steps needed to bring it into line 483 */ 484 st_identify_drive(st, &sa->sa_inqbuf); 485 /* 486 * Use the subdriver to request information regarding 487 * the drive. We cannot use interrupts yet, so the 488 * request must specify this. 489 */ 490 printf("\n"); 491 printf("%s: %s", st->sc_dev.dv_xname, st->quirkdata ? "rogue, " : ""); 492 if (scsipi_test_unit_ready(periph, 493 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE) || 494 st_mode_sense(st, 495 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE)) 496 printf("drive empty\n"); 497 else { 498 printf("density code %d, ", st->media_density); 499 if (st->media_blksize > 0) 500 printf("%d-byte", st->media_blksize); 501 else 502 printf("variable"); 503 printf(" blocks, write-%s\n", 504 (st->flags & ST_READONLY) ? "protected" : "enabled"); 505 } 506 507 /* 508 * Set up the buf queue for this device 509 */ 510 BUFQ_INIT(&st->buf_queue); 511 512 #if NRND > 0 513 rnd_attach_source(&st->rnd_source, st->sc_dev.dv_xname, 514 RND_TYPE_TAPE, 0); 515 #endif 516 } 517 518 /* 519 * Use the inquiry routine in 'scsi_base' to get drive info so we can 520 * Further tailor our behaviour. 521 */ 522 void 523 st_identify_drive(st, inqbuf) 524 struct st_softc *st; 525 struct scsipi_inquiry_pattern *inqbuf; 526 { 527 struct st_quirk_inquiry_pattern *finger; 528 int priority; 529 530 finger = (struct st_quirk_inquiry_pattern *)scsipi_inqmatch(inqbuf, 531 (caddr_t)st_quirk_patterns, 532 sizeof(st_quirk_patterns) / sizeof(st_quirk_patterns[0]), 533 sizeof(st_quirk_patterns[0]), &priority); 534 if (priority != 0) { 535 st->quirkdata = &finger->quirkdata; 536 st->drive_quirks = finger->quirkdata.quirks; 537 st->quirks = finger->quirkdata.quirks; /* start value */ 538 st->page_0_size = finger->quirkdata.page_0_size; 539 st_loadquirks(st); 540 } 541 } 542 543 /* 544 * initialise the subdevices to the default (QUIRK) state. 545 * this will remove any setting made by the system operator or previous 546 * operations. 547 */ 548 void 549 st_loadquirks(st) 550 struct st_softc *st; 551 { 552 int i; 553 struct modes *mode; 554 struct modes *mode2; 555 556 mode = st->quirkdata->modes; 557 mode2 = st->modes; 558 for (i = 0; i < 4; i++) { 559 bzero(mode2, sizeof(struct modes)); 560 st->modeflags[i] &= ~(BLKSIZE_SET_BY_QUIRK | 561 DENSITY_SET_BY_QUIRK | BLKSIZE_SET_BY_USER | 562 DENSITY_SET_BY_USER); 563 if ((mode->quirks | st->drive_quirks) & ST_Q_FORCE_BLKSIZE) { 564 mode2->blksize = mode->blksize; 565 st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; 566 } 567 if (mode->density) { 568 mode2->density = mode->density; 569 st->modeflags[i] |= DENSITY_SET_BY_QUIRK; 570 } 571 mode++; 572 mode2++; 573 } 574 } 575 576 /* 577 * open the device. 578 */ 579 int 580 stopen(dev, flags, mode, p) 581 dev_t dev; 582 int flags; 583 int mode; 584 struct proc *p; 585 { 586 u_int stmode, dsty; 587 int error, sflags, unit, tries, ntries; 588 struct st_softc *st; 589 struct scsipi_periph *periph; 590 struct scsipi_adapter *adapt; 591 592 unit = STUNIT(dev); 593 if (unit >= st_cd.cd_ndevs) 594 return (ENXIO); 595 st = st_cd.cd_devs[unit]; 596 if (st == NULL) 597 return (ENXIO); 598 599 stmode = STMODE(dev); 600 dsty = STDSTY(dev); 601 602 periph = st->sc_periph; 603 adapt = periph->periph_channel->chan_adapter; 604 605 SC_DEBUG(periph, SCSIPI_DB1, ("open: dev=0x%x (unit %d (of %d))\n", dev, 606 unit, st_cd.cd_ndevs)); 607 608 609 /* 610 * Only allow one at a time 611 */ 612 if (periph->periph_flags & PERIPH_OPEN) { 613 printf("%s: already open\n", st->sc_dev.dv_xname); 614 return (EBUSY); 615 } 616 617 if ((error = scsipi_adapter_addref(adapt)) != 0) 618 return (error); 619 620 /* 621 * clear any latched errors. 622 */ 623 st->mt_resid = 0; 624 st->mt_erreg = 0; 625 st->asc = 0; 626 st->ascq = 0; 627 628 /* 629 * Catch any unit attention errors. Be silent about this 630 * unless we're already mounted. We ignore media change 631 * if we're in control mode or not mounted yet. 632 */ 633 if ((st->flags & ST_MOUNTED) == 0 || stmode == CTRL_MODE) { 634 #ifdef SCSIDEBUG 635 sflags = XS_CTL_IGNORE_MEDIA_CHANGE; 636 #else 637 sflags = XS_CTL_SILENT|XS_CTL_IGNORE_MEDIA_CHANGE; 638 #endif 639 } else 640 sflags = 0; 641 642 /* 643 * If we're already mounted or we aren't configured for 644 * a mount delay, only try a test unit ready once. Otherwise, 645 * try up to ST_MOUNT_DELAY times with a rest interval of 646 * one second between each try. 647 */ 648 649 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0) { 650 ntries = 1; 651 } else { 652 ntries = ST_MOUNT_DELAY; 653 } 654 655 for (error = tries = 0; tries < ntries; tries++) { 656 int slpintr, oflags; 657 658 /* 659 * If we had no error, or we're opening the control mode 660 * device, we jump out right away. 661 */ 662 663 error = scsipi_test_unit_ready(periph, sflags); 664 if (error == 0 || stmode == CTRL_MODE) { 665 break; 666 } 667 668 /* 669 * We had an error. 670 * 671 * If we're already mounted or we aren't configured for 672 * a mount delay, or the error isn't a NOT READY error, 673 * skip to the error exit now. 674 */ 675 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0 || 676 (st->mt_key != SKEY_NOT_READY)) { 677 goto bad; 678 } 679 680 /* 681 * clear any latched errors. 682 */ 683 st->mt_resid = 0; 684 st->mt_erreg = 0; 685 st->asc = 0; 686 st->ascq = 0; 687 688 /* 689 * Fake that we have the device open so 690 * we block other apps from getting in. 691 */ 692 693 oflags = periph->periph_flags; 694 periph->periph_flags |= PERIPH_OPEN; 695 696 slpintr = tsleep(&lbolt, PUSER|PCATCH, "stload", 0); 697 698 periph->periph_flags = oflags; /* restore flags */ 699 if (slpintr) { 700 goto bad; 701 } 702 } 703 704 705 /* 706 * If the mode is 3 (e.g. minor = 3,7,11,15) then the device has 707 * been opened to set defaults and perform other, usually non-I/O 708 * related, operations. In this case, do a quick check to see 709 * whether the unit actually had a tape loaded (this will be known 710 * as to whether or not we got a NOT READY for the above 711 * unit attention). If a tape is there, go do a mount sequence. 712 */ 713 if (stmode == CTRL_MODE && st->mt_key == SKEY_NOT_READY) { 714 periph->periph_flags |= PERIPH_OPEN; 715 return (0); 716 } 717 718 /* 719 * If we get this far and had an error set, that means we failed 720 * to pass the 'test unit ready' test for the non-controlmode device, 721 * so we bounce the open. 722 */ 723 724 if (error) 725 return (error); 726 727 /* 728 * Else, we're now committed to saying we're open. 729 */ 730 731 periph->periph_flags |= PERIPH_OPEN; /* unit attn are now errors */ 732 733 /* 734 * If it's a different mode, or if the media has been 735 * invalidated, unmount the tape from the previous 736 * session but continue with open processing 737 */ 738 if (st->last_dsty != dsty || 739 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 740 st_unmount(st, NOEJECT); 741 742 /* 743 * If we are not mounted, then we should start a new 744 * mount session. 745 */ 746 if ((st->flags & ST_MOUNTED) == 0) { 747 st_mount_tape(st, dsty, flags); 748 st->last_dsty = dsty; 749 } 750 751 SC_DEBUG(periph, SCSIPI_DB2, ("open complete\n")); 752 return (0); 753 754 bad: 755 st_unmount(st, NOEJECT); 756 scsipi_adapter_delref(adapt); 757 periph->periph_flags &= ~PERIPH_OPEN; 758 return (error); 759 } 760 761 /* 762 * close the device.. only called if we are the LAST 763 * occurence of an open device 764 */ 765 int 766 stclose(dev, flags, mode, p) 767 dev_t dev; 768 int flags; 769 int mode; 770 struct proc *p; 771 { 772 int stxx, error = 0; 773 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 774 struct scsipi_periph *periph = st->sc_periph; 775 struct scsipi_adapter *adapt = periph->periph_channel->chan_adapter; 776 777 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("closing\n")); 778 779 /* 780 * Make sure that a tape opened in write-only mode will have 781 * file marks written on it when closed, even if not written to. 782 * 783 * This is for SUN compatibility. Actually, the Sun way of 784 * things is to: 785 * 786 * only write filemarks if there are fmks to be written and 787 * - open for write (possibly read/write) 788 * - the last operation was a write 789 * or: 790 * - opened for wronly 791 * - no data was written (including filemarks) 792 */ 793 794 stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); 795 if (((flags & FWRITE) && stxx == ST_WRITTEN) || 796 ((flags & O_ACCMODE) == FWRITE && stxx == 0)) { 797 int nm; 798 error = st_check_eod(st, FALSE, &nm, 0); 799 } 800 801 switch (STMODE(dev)) { 802 case NORMAL_MODE: 803 st_unmount(st, NOEJECT); 804 break; 805 case NOREW_MODE: 806 case CTRL_MODE: 807 /* 808 * Leave mounted unless media seems to have been removed. 809 * 810 * Otherwise, if we're to terminate a tape with more than one 811 * filemark [ and because we're not rewinding here ], backspace 812 * one filemark so that later appends will see an unbroken 813 * sequence of: 814 * 815 * file - FMK - file - FMK ... file - FMK FMK (EOM) 816 */ 817 if ((periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 818 st_unmount(st, NOEJECT); 819 } else if (error == 0) { 820 /* 821 * ST_WRITTEN was preserved from above. 822 * 823 * All we need to know here is: 824 * 825 * Were we writing this tape and was the last 826 * operation a write? 827 * 828 * Are there supposed to be 2FM at EOD? 829 * 830 * If both statements are true, then we backspace 831 * one filemark. 832 */ 833 stxx |= (st->flags & ST_2FM_AT_EOD); 834 if ((flags & FWRITE) != 0 && 835 (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { 836 error = st_space(st, -1, SP_FILEMARKS, 0); 837 } 838 } 839 break; 840 case EJECT_MODE: 841 st_unmount(st, EJECT); 842 break; 843 } 844 845 scsipi_wait_drain(periph); 846 847 scsipi_adapter_delref(adapt); 848 periph->periph_flags &= ~PERIPH_OPEN; 849 850 return (error); 851 } 852 853 /* 854 * Start a new mount session. 855 * Copy in all the default parameters from the selected device mode. 856 * and try guess any that seem to be defaulted. 857 */ 858 int 859 st_mount_tape(st, dsty, flags) 860 struct st_softc *st; 861 int dsty, flags; 862 { 863 struct scsipi_periph *periph = st->sc_periph; 864 int error = 0; 865 866 if (st->flags & ST_MOUNTED) 867 return (0); 868 869 SC_DEBUG(periph, SCSIPI_DB1, ("mounting\n ")); 870 st->flags |= ST_NEW_MOUNT; 871 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 872 /* 873 * If the media is new, then make sure we give it a chance to 874 * to do a 'load' instruction. (We assume it is new.) 875 */ 876 if ((error = st_load(st, LD_LOAD, XS_CTL_SILENT)) != 0) 877 return (error); 878 /* 879 * Throw another dummy instruction to catch 880 * 'Unit attention' errors. Many drives give 881 * these after doing a Load instruction (with 882 * the MEDIUM MAY HAVE CHANGED asc/ascq). 883 */ 884 scsipi_test_unit_ready(periph, XS_CTL_SILENT); /* XXX */ 885 886 /* 887 * Some devices can't tell you much until they have been 888 * asked to look at the media. This quirk does this. 889 */ 890 if (st->quirks & ST_Q_SENSE_HELP) 891 if ((error = st_touch_tape(st)) != 0) 892 return (error); 893 /* 894 * Load the physical device parameters 895 * loads: blkmin, blkmax 896 */ 897 if ((error = st_read_block_limits(st, 0)) != 0) 898 return (error); 899 /* 900 * Load the media dependent parameters 901 * includes: media_blksize,media_density,numblks 902 * As we have a tape in, it should be reflected here. 903 * If not you may need the "quirk" above. 904 */ 905 if ((error = st_mode_sense(st, 0)) != 0) 906 return (error); 907 /* 908 * If we have gained a permanent density from somewhere, 909 * then use it in preference to the one supplied by 910 * default by the driver. 911 */ 912 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 913 st->density = st->modes[dsty].density; 914 else 915 st->density = st->media_density; 916 /* 917 * If we have gained a permanent blocksize 918 * then use it in preference to the one supplied by 919 * default by the driver. 920 */ 921 st->flags &= ~ST_FIXEDBLOCKS; 922 if (st->modeflags[dsty] & 923 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 924 st->blksize = st->modes[dsty].blksize; 925 if (st->blksize) 926 st->flags |= ST_FIXEDBLOCKS; 927 } else { 928 if ((error = st_decide_mode(st, FALSE)) != 0) 929 return (error); 930 } 931 if ((error = st_mode_select(st, 0)) != 0) { 932 printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); 933 return (error); 934 } 935 if (!(st->quirks & ST_Q_NOPREVENT)) { 936 scsipi_prevent(periph, PR_PREVENT, 937 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 938 } 939 st->flags &= ~ST_NEW_MOUNT; 940 st->flags |= ST_MOUNTED; 941 periph->periph_flags |= PERIPH_MEDIA_LOADED; /* move earlier? */ 942 943 return (0); 944 } 945 946 /* 947 * End the present mount session. 948 * Rewind, and optionally eject the tape. 949 * Reset various flags to indicate that all new 950 * operations require another mount operation 951 */ 952 void 953 st_unmount(st, eject) 954 struct st_softc *st; 955 boolean eject; 956 { 957 struct scsipi_periph *periph = st->sc_periph; 958 int nmarks; 959 960 if ((st->flags & ST_MOUNTED) == 0) 961 return; 962 SC_DEBUG(periph, SCSIPI_DB1, ("unmounting\n")); 963 st_check_eod(st, FALSE, &nmarks, XS_CTL_IGNORE_NOT_READY); 964 st_rewind(st, 0, XS_CTL_IGNORE_NOT_READY); 965 scsipi_prevent(periph, PR_ALLOW, 966 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 967 if (eject) 968 st_load(st, LD_UNLOAD, XS_CTL_IGNORE_NOT_READY); 969 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 970 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 971 } 972 973 /* 974 * Given all we know about the device, media, mode, 'quirks' and 975 * initial operation, make a decision as to how we should be set 976 * to run (regarding blocking and EOD marks) 977 */ 978 int 979 st_decide_mode(st, first_read) 980 struct st_softc *st; 981 boolean first_read; 982 { 983 984 SC_DEBUG(st->sc_periph, SCSIPI_DB2, ("starting block mode decision\n")); 985 986 /* 987 * If the drive can only handle fixed-length blocks and only at 988 * one size, perhaps we should just do that. 989 */ 990 if (st->blkmin && (st->blkmin == st->blkmax)) { 991 st->flags |= ST_FIXEDBLOCKS; 992 st->blksize = st->blkmin; 993 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 994 ("blkmin == blkmax of %d\n", st->blkmin)); 995 goto done; 996 } 997 /* 998 * If the tape density mandates (or even suggests) use of fixed 999 * or variable-length blocks, comply. 1000 */ 1001 switch (st->density) { 1002 case HALFINCH_800: 1003 case HALFINCH_1600: 1004 case HALFINCH_6250: 1005 case DDS: 1006 st->flags &= ~ST_FIXEDBLOCKS; 1007 st->blksize = 0; 1008 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1009 ("density specified variable\n")); 1010 goto done; 1011 case QIC_11: 1012 case QIC_24: 1013 case QIC_120: 1014 case QIC_150: 1015 case QIC_525: 1016 case QIC_1320: 1017 case QIC_3095: 1018 case QIC_3220: 1019 st->flags |= ST_FIXEDBLOCKS; 1020 if (st->media_blksize > 0) 1021 st->blksize = st->media_blksize; 1022 else 1023 st->blksize = DEF_FIXED_BSIZE; 1024 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1025 ("density specified fixed\n")); 1026 goto done; 1027 } 1028 /* 1029 * If we're about to read the tape, perhaps we should choose 1030 * fixed or variable-length blocks and block size according to 1031 * what the drive found on the tape. 1032 */ 1033 if (first_read && 1034 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 1035 (st->media_blksize == DEF_FIXED_BSIZE) || 1036 (st->media_blksize == 1024))) { 1037 if (st->media_blksize > 0) 1038 st->flags |= ST_FIXEDBLOCKS; 1039 else 1040 st->flags &= ~ST_FIXEDBLOCKS; 1041 st->blksize = st->media_blksize; 1042 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1043 ("Used media_blksize of %d\n", st->media_blksize)); 1044 goto done; 1045 } 1046 /* 1047 * We're getting no hints from any direction. Choose variable- 1048 * length blocks arbitrarily. 1049 */ 1050 st->flags &= ~ST_FIXEDBLOCKS; 1051 st->blksize = 0; 1052 SC_DEBUG(st->sc_periph, SCSIPI_DB3, 1053 ("Give up and default to variable mode\n")); 1054 1055 done: 1056 /* 1057 * Decide whether or not to write two file marks to signify end- 1058 * of-data. Make the decision as a function of density. If 1059 * the decision is not to use a second file mark, the SCSI BLANK 1060 * CHECK condition code will be recognized as end-of-data when 1061 * first read. 1062 * (I think this should be a by-product of fixed/variable..julian) 1063 */ 1064 switch (st->density) { 1065 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 1066 case QIC_11: 1067 case QIC_24: 1068 case QIC_120: 1069 case QIC_150: 1070 case QIC_525: 1071 case QIC_1320: 1072 case QIC_3095: 1073 case QIC_3220: 1074 st->flags &= ~ST_2FM_AT_EOD; 1075 break; 1076 default: 1077 st->flags |= ST_2FM_AT_EOD; 1078 } 1079 return (0); 1080 } 1081 1082 /* 1083 * Actually translate the requested transfer into 1084 * one the physical driver can understand 1085 * The transfer is described by a buf and will include 1086 * only one physical transfer. 1087 */ 1088 void 1089 ststrategy(bp) 1090 struct buf *bp; 1091 { 1092 struct st_softc *st = st_cd.cd_devs[STUNIT(bp->b_dev)]; 1093 int s; 1094 1095 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1096 ("ststrategy %ld bytes @ blk %d\n", bp->b_bcount, bp->b_blkno)); 1097 /* 1098 * If it's a null transfer, return immediatly 1099 */ 1100 if (bp->b_bcount == 0) 1101 goto done; 1102 1103 /* If offset is negative, error */ 1104 if (bp->b_blkno < 0) { 1105 bp->b_error = EINVAL; 1106 goto bad; 1107 } 1108 1109 /* 1110 * Odd sized request on fixed drives are verboten 1111 */ 1112 if (st->flags & ST_FIXEDBLOCKS) { 1113 if (bp->b_bcount % st->blksize) { 1114 printf("%s: bad request, must be multiple of %d\n", 1115 st->sc_dev.dv_xname, st->blksize); 1116 bp->b_error = EIO; 1117 goto bad; 1118 } 1119 } 1120 /* 1121 * as are out-of-range requests on variable drives. 1122 */ 1123 else if (bp->b_bcount < st->blkmin || 1124 (st->blkmax && bp->b_bcount > st->blkmax)) { 1125 printf("%s: bad request, must be between %d and %d\n", 1126 st->sc_dev.dv_xname, st->blkmin, st->blkmax); 1127 bp->b_error = EIO; 1128 goto bad; 1129 } 1130 s = splbio(); 1131 1132 /* 1133 * Place it in the queue of activities for this tape 1134 * at the end (a bit silly because we only have on user.. 1135 * (but it could fork())) 1136 */ 1137 BUFQ_INSERT_TAIL(&st->buf_queue, bp); 1138 1139 /* 1140 * Tell the device to get going on the transfer if it's 1141 * not doing anything, otherwise just wait for completion 1142 * (All a bit silly if we're only allowing 1 open but..) 1143 */ 1144 ststart(st->sc_periph); 1145 1146 splx(s); 1147 return; 1148 bad: 1149 bp->b_flags |= B_ERROR; 1150 done: 1151 /* 1152 * Correctly set the buf to indicate a completed xfer 1153 */ 1154 bp->b_resid = bp->b_bcount; 1155 biodone(bp); 1156 return; 1157 } 1158 1159 /* 1160 * ststart looks to see if there is a buf waiting for the device 1161 * and that the device is not already busy. If both are true, 1162 * It dequeues the buf and creates a scsi command to perform the 1163 * transfer required. The transfer request will call scsipi_done 1164 * on completion, which will in turn call this routine again 1165 * so that the next queued transfer is performed. 1166 * The bufs are queued by the strategy routine (ststrategy) 1167 * 1168 * This routine is also called after other non-queued requests 1169 * have been made of the scsi driver, to ensure that the queue 1170 * continues to be drained. 1171 * ststart() is called at splbio 1172 */ 1173 void 1174 ststart(periph) 1175 struct scsipi_periph *periph; 1176 { 1177 struct st_softc *st = (void *)periph->periph_dev; 1178 struct buf *bp; 1179 struct scsi_rw_tape cmd; 1180 int flags, error; 1181 1182 SC_DEBUG(periph, SCSIPI_DB2, ("ststart ")); 1183 /* 1184 * See if there is a buf to do and we are not already 1185 * doing one 1186 */ 1187 while (periph->periph_active < periph->periph_openings) { 1188 /* if a special awaits, let it proceed first */ 1189 if (periph->periph_flags & PERIPH_WAITING) { 1190 periph->periph_flags &= ~PERIPH_WAITING; 1191 wakeup((caddr_t)periph); 1192 return; 1193 } 1194 1195 if ((bp = BUFQ_FIRST(&st->buf_queue)) == NULL) 1196 return; 1197 BUFQ_REMOVE(&st->buf_queue, bp); 1198 1199 /* 1200 * If the device has been unmounted by the user 1201 * then throw away all requests until done. 1202 */ 1203 if ((st->flags & ST_MOUNTED) == 0 || 1204 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 1205 /* make sure that one implies the other.. */ 1206 periph->periph_flags &= ~PERIPH_MEDIA_LOADED; 1207 bp->b_flags |= B_ERROR; 1208 bp->b_error = EIO; 1209 bp->b_resid = bp->b_bcount; 1210 biodone(bp); 1211 continue; 1212 } 1213 /* 1214 * only FIXEDBLOCK devices have pending I/O or space operations. 1215 */ 1216 if (st->flags & ST_FIXEDBLOCKS) { 1217 /* 1218 * If we are at a filemark but have not reported it yet 1219 * then we should report it now 1220 */ 1221 if (st->flags & ST_AT_FILEMARK) { 1222 if ((bp->b_flags & B_READ) == B_WRITE) { 1223 /* 1224 * Handling of ST_AT_FILEMARK in 1225 * st_space will fill in the right file 1226 * mark count. 1227 * Back up over filemark 1228 */ 1229 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1230 bp->b_flags |= B_ERROR; 1231 bp->b_error = EIO; 1232 biodone(bp); 1233 continue; 1234 } 1235 } else { 1236 bp->b_resid = bp->b_bcount; 1237 bp->b_error = 0; 1238 bp->b_flags &= ~B_ERROR; 1239 st->flags &= ~ST_AT_FILEMARK; 1240 biodone(bp); 1241 continue; /* seek more work */ 1242 } 1243 } 1244 } 1245 /* 1246 * If we are at EOM but have not reported it 1247 * yet then we should report it now. 1248 */ 1249 if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { 1250 bp->b_resid = bp->b_bcount; 1251 if (st->flags & ST_EIO_PENDING) { 1252 bp->b_error = EIO; 1253 bp->b_flags |= B_ERROR; 1254 } 1255 st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); 1256 biodone(bp); 1257 continue; /* seek more work */ 1258 } 1259 1260 /* 1261 * Fill out the scsi command 1262 */ 1263 bzero(&cmd, sizeof(cmd)); 1264 flags = XS_CTL_NOSLEEP | XS_CTL_ASYNC; 1265 if ((bp->b_flags & B_READ) == B_WRITE) { 1266 cmd.opcode = WRITE; 1267 st->flags &= ~ST_FM_WRITTEN; 1268 flags |= XS_CTL_DATA_OUT; 1269 } else { 1270 cmd.opcode = READ; 1271 flags |= XS_CTL_DATA_IN; 1272 } 1273 1274 /* 1275 * Handle "fixed-block-mode" tape drives by using the 1276 * block count instead of the length. 1277 */ 1278 if (st->flags & ST_FIXEDBLOCKS) { 1279 cmd.byte2 |= SRW_FIXED; 1280 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1281 } else 1282 _lto3b(bp->b_bcount, cmd.len); 1283 1284 /* 1285 * go ask the adapter to do all this for us 1286 */ 1287 error = scsipi_command(periph, 1288 (struct scsipi_generic *)&cmd, sizeof(cmd), 1289 (u_char *)bp->b_data, bp->b_bcount, 1290 0, ST_IO_TIME, bp, flags); 1291 if (error) { 1292 printf("%s: not queued, error %d\n", 1293 st->sc_dev.dv_xname, error); 1294 } 1295 } /* go back and see if we can cram more work in.. */ 1296 } 1297 1298 void 1299 stdone(xs) 1300 struct scsipi_xfer *xs; 1301 { 1302 struct st_softc *st = (void *)xs->xs_periph->periph_dev; 1303 1304 if (xs->bp != NULL) { 1305 if ((xs->bp->b_flags & B_READ) == B_WRITE) { 1306 st->flags |= ST_WRITTEN; 1307 } else { 1308 st->flags &= ~ST_WRITTEN; 1309 } 1310 #if NRND > 0 1311 rnd_add_uint32(&st->rnd_source, xs->bp->b_blkno); 1312 #endif 1313 } 1314 } 1315 1316 int 1317 stread(dev, uio, iomode) 1318 dev_t dev; 1319 struct uio *uio; 1320 int iomode; 1321 { 1322 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1323 1324 return (physio(ststrategy, NULL, dev, B_READ, 1325 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1326 } 1327 1328 int 1329 stwrite(dev, uio, iomode) 1330 dev_t dev; 1331 struct uio *uio; 1332 int iomode; 1333 { 1334 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1335 1336 return (physio(ststrategy, NULL, dev, B_WRITE, 1337 st->sc_periph->periph_channel->chan_adapter->adapt_minphys, uio)); 1338 } 1339 1340 /* 1341 * Perform special action on behalf of the user; 1342 * knows about the internals of this device 1343 */ 1344 int 1345 stioctl(dev, cmd, arg, flag, p) 1346 dev_t dev; 1347 u_long cmd; 1348 caddr_t arg; 1349 int flag; 1350 struct proc *p; 1351 { 1352 int error = 0; 1353 int unit; 1354 int number, nmarks, dsty; 1355 int flags; 1356 struct st_softc *st; 1357 int hold_blksize; 1358 u_int8_t hold_density; 1359 struct mtop *mt = (struct mtop *) arg; 1360 1361 /* 1362 * Find the device that the user is talking about 1363 */ 1364 flags = 0; /* give error messages, act on errors etc. */ 1365 unit = STUNIT(dev); 1366 dsty = STDSTY(dev); 1367 st = st_cd.cd_devs[unit]; 1368 hold_blksize = st->blksize; 1369 hold_density = st->density; 1370 1371 switch ((u_int) cmd) { 1372 1373 case MTIOCGET: { 1374 struct mtget *g = (struct mtget *) arg; 1375 /* 1376 * (to get the current state of READONLY) 1377 */ 1378 error = st_mode_sense(st, XS_CTL_SILENT); 1379 if (error) 1380 break; 1381 SC_DEBUG(st->sc_periph, SCSIPI_DB1, ("[ioctl: get status]\n")); 1382 bzero(g, sizeof(struct mtget)); 1383 g->mt_type = 0x7; /* Ultrix compat *//*? */ 1384 g->mt_blksiz = st->blksize; 1385 g->mt_density = st->density; 1386 g->mt_mblksiz[0] = st->modes[0].blksize; 1387 g->mt_mblksiz[1] = st->modes[1].blksize; 1388 g->mt_mblksiz[2] = st->modes[2].blksize; 1389 g->mt_mblksiz[3] = st->modes[3].blksize; 1390 g->mt_mdensity[0] = st->modes[0].density; 1391 g->mt_mdensity[1] = st->modes[1].density; 1392 g->mt_mdensity[2] = st->modes[2].density; 1393 g->mt_mdensity[3] = st->modes[3].density; 1394 if (st->flags & ST_READONLY) 1395 g->mt_dsreg |= MT_DS_RDONLY; 1396 if (st->flags & ST_MOUNTED) 1397 g->mt_dsreg |= MT_DS_MOUNTED; 1398 g->mt_resid = st->mt_resid; 1399 g->mt_erreg = st->mt_erreg; 1400 /* 1401 * clear latched errors. 1402 */ 1403 st->mt_resid = 0; 1404 st->mt_erreg = 0; 1405 st->asc = 0; 1406 st->ascq = 0; 1407 break; 1408 } 1409 case MTIOCTOP: { 1410 1411 SC_DEBUG(st->sc_periph, SCSIPI_DB1, 1412 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1413 mt->mt_count)); 1414 1415 /* compat: in U*x it is a short */ 1416 number = mt->mt_count; 1417 switch ((short) (mt->mt_op)) { 1418 case MTWEOF: /* write an end-of-file record */ 1419 error = st_write_filemarks(st, number, flags); 1420 break; 1421 case MTBSF: /* backward space file */ 1422 number = -number; 1423 case MTFSF: /* forward space file */ 1424 error = st_check_eod(st, FALSE, &nmarks, flags); 1425 if (!error) 1426 error = st_space(st, number - nmarks, 1427 SP_FILEMARKS, flags); 1428 break; 1429 case MTBSR: /* backward space record */ 1430 number = -number; 1431 case MTFSR: /* forward space record */ 1432 error = st_check_eod(st, TRUE, &nmarks, flags); 1433 if (!error) 1434 error = st_space(st, number, SP_BLKS, flags); 1435 break; 1436 case MTREW: /* rewind */ 1437 error = st_rewind(st, 0, flags); 1438 break; 1439 case MTOFFL: /* rewind and put the drive offline */ 1440 st_unmount(st, EJECT); 1441 break; 1442 case MTNOP: /* no operation, sets status only */ 1443 break; 1444 case MTRETEN: /* retension the tape */ 1445 error = st_load(st, LD_RETENSION, flags); 1446 if (!error) 1447 error = st_load(st, LD_LOAD, flags); 1448 break; 1449 case MTEOM: /* forward space to end of media */ 1450 error = st_check_eod(st, FALSE, &nmarks, flags); 1451 if (!error) 1452 error = st_space(st, 1, SP_EOM, flags); 1453 break; 1454 case MTCACHE: /* enable controller cache */ 1455 st->flags &= ~ST_DONTBUFFER; 1456 goto try_new_value; 1457 case MTNOCACHE: /* disable controller cache */ 1458 st->flags |= ST_DONTBUFFER; 1459 goto try_new_value; 1460 case MTERASE: /* erase volume */ 1461 error = st_erase(st, number, flags); 1462 break; 1463 case MTSETBSIZ: /* Set block size for device */ 1464 #ifdef NOTYET 1465 if (!(st->flags & ST_NEW_MOUNT)) { 1466 uprintf("re-mount tape before changing blocksize"); 1467 error = EINVAL; 1468 break; 1469 } 1470 #endif 1471 if (number == 0) 1472 st->flags &= ~ST_FIXEDBLOCKS; 1473 else { 1474 if ((st->blkmin || st->blkmax) && 1475 (number < st->blkmin || 1476 number > st->blkmax)) { 1477 error = EINVAL; 1478 break; 1479 } 1480 st->flags |= ST_FIXEDBLOCKS; 1481 } 1482 st->blksize = number; 1483 st->flags |= ST_BLOCK_SET; /*XXX */ 1484 goto try_new_value; 1485 1486 case MTSETDNSTY: /* Set density for device and mode */ 1487 /* 1488 * Any number >= 0 and <= 0xff is legal. Numbers 1489 * above 0x80 are 'vendor unique'. 1490 */ 1491 if (number < 0 || number > 255) { 1492 error = EINVAL; 1493 break; 1494 } else 1495 st->density = number; 1496 goto try_new_value; 1497 1498 case MTCMPRESS: 1499 error = st_cmprss(st, number); 1500 break; 1501 1502 case MTEWARN: 1503 if (number) 1504 st->flags |= ST_EARLYWARN; 1505 else 1506 st->flags &= ~ST_EARLYWARN; 1507 break; 1508 1509 default: 1510 error = EINVAL; 1511 } 1512 break; 1513 } 1514 case MTIOCIEOT: 1515 case MTIOCEEOT: 1516 break; 1517 1518 case MTIOCRDSPOS: 1519 error = st_rdpos(st, 0, (u_int32_t *) arg); 1520 break; 1521 1522 case MTIOCRDHPOS: 1523 error = st_rdpos(st, 1, (u_int32_t *) arg); 1524 break; 1525 1526 case MTIOCSLOCATE: 1527 error = st_setpos(st, 0, (u_int32_t *) arg); 1528 break; 1529 1530 case MTIOCHLOCATE: 1531 error = st_setpos(st, 1, (u_int32_t *) arg); 1532 break; 1533 1534 1535 default: 1536 error = scsipi_do_ioctl(st->sc_periph, dev, cmd, arg, 1537 flag, p); 1538 break; 1539 } 1540 return (error); 1541 /*-----------------------------*/ 1542 try_new_value: 1543 /* 1544 * Check that the mode being asked for is aggreeable to the 1545 * drive. If not, put it back the way it was. 1546 */ 1547 if ((error = st_mode_select(st, 0)) != 0) {/* put it back as it was */ 1548 printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); 1549 st->density = hold_density; 1550 st->blksize = hold_blksize; 1551 if (st->blksize) 1552 st->flags |= ST_FIXEDBLOCKS; 1553 else 1554 st->flags &= ~ST_FIXEDBLOCKS; 1555 return (error); 1556 } 1557 /* 1558 * As the drive liked it, if we are setting a new default, 1559 * set it into the structures as such. 1560 * 1561 * The means for deciding this are not finalised yet- but 1562 * if the device was opened in Control Mode, the values 1563 * are persistent now across mounts. 1564 */ 1565 if (STMODE(dev) == CTRL_MODE) { 1566 switch ((short) (mt->mt_op)) { 1567 case MTSETBSIZ: 1568 st->modes[dsty].blksize = st->blksize; 1569 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1570 break; 1571 case MTSETDNSTY: 1572 st->modes[dsty].density = st->density; 1573 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1574 break; 1575 } 1576 } 1577 return (0); 1578 } 1579 1580 /* 1581 * Do a synchronous read. 1582 */ 1583 int 1584 st_read(st, buf, size, flags) 1585 struct st_softc *st; 1586 int size; 1587 int flags; 1588 char *buf; 1589 { 1590 struct scsi_rw_tape cmd; 1591 1592 /* 1593 * If it's a null transfer, return immediatly 1594 */ 1595 if (size == 0) 1596 return (0); 1597 bzero(&cmd, sizeof(cmd)); 1598 cmd.opcode = READ; 1599 if (st->flags & ST_FIXEDBLOCKS) { 1600 cmd.byte2 |= SRW_FIXED; 1601 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1602 cmd.len); 1603 } else 1604 _lto3b(size, cmd.len); 1605 return (scsipi_command(st->sc_periph, 1606 (struct scsipi_generic *)&cmd, sizeof(cmd), 1607 (u_char *)buf, size, 0, ST_IO_TIME, NULL, flags | XS_CTL_DATA_IN)); 1608 } 1609 1610 /* 1611 * Ask the drive what it's min and max blk sizes are. 1612 */ 1613 int 1614 st_read_block_limits(st, flags) 1615 struct st_softc *st; 1616 int flags; 1617 { 1618 struct scsi_block_limits cmd; 1619 struct scsi_block_limits_data block_limits; 1620 struct scsipi_periph *periph = st->sc_periph; 1621 int error; 1622 1623 /* 1624 * First check if we have it all loaded 1625 */ 1626 if ((periph->periph_flags & PERIPH_MEDIA_LOADED)) 1627 return (0); 1628 1629 /* 1630 * do a 'Read Block Limits' 1631 */ 1632 bzero(&cmd, sizeof(cmd)); 1633 cmd.opcode = READ_BLOCK_LIMITS; 1634 1635 /* 1636 * do the command, update the global values 1637 */ 1638 error = scsipi_command(periph, (struct scsipi_generic *)&cmd, 1639 sizeof(cmd), (u_char *)&block_limits, sizeof(block_limits), 1640 ST_RETRIES, ST_CTL_TIME, NULL, 1641 flags | XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); 1642 if (error) 1643 return (error); 1644 1645 st->blkmin = _2btol(block_limits.min_length); 1646 st->blkmax = _3btol(block_limits.max_length); 1647 1648 SC_DEBUG(periph, SCSIPI_DB3, 1649 ("(%d <= blksize <= %d)\n", st->blkmin, st->blkmax)); 1650 return (0); 1651 } 1652 1653 /* 1654 * Get the scsi driver to send a full inquiry to the 1655 * device and use the results to fill out the global 1656 * parameter structure. 1657 * 1658 * called from: 1659 * attach 1660 * open 1661 * ioctl (to reset original blksize) 1662 */ 1663 int 1664 st_mode_sense(st, flags) 1665 struct st_softc *st; 1666 int flags; 1667 { 1668 u_int scsipi_sense_len; 1669 int error; 1670 struct scsi_mode_sense cmd; 1671 struct scsipi_sense { 1672 struct scsi_mode_header header; 1673 struct scsi_blk_desc blk_desc; 1674 u_char sense_data[MAX_PAGE_0_SIZE]; 1675 } scsipi_sense; 1676 struct scsipi_periph *periph = st->sc_periph; 1677 1678 scsipi_sense_len = 12 + st->page_0_size; 1679 1680 /* 1681 * Set up a mode sense 1682 */ 1683 bzero(&cmd, sizeof(cmd)); 1684 cmd.opcode = SCSI_MODE_SENSE; 1685 cmd.length = scsipi_sense_len; 1686 1687 /* 1688 * do the command, but we don't need the results 1689 * just print them for our interest's sake, if asked, 1690 * or if we need it as a template for the mode select 1691 * store it away. 1692 */ 1693 error = scsipi_command(periph, (struct scsipi_generic *)&cmd, 1694 sizeof(cmd), (u_char *)&scsipi_sense, scsipi_sense_len, 1695 ST_RETRIES, ST_CTL_TIME, NULL, 1696 flags | XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); 1697 if (error) 1698 return (error); 1699 1700 st->numblks = _3btol(scsipi_sense.blk_desc.nblocks); 1701 st->media_blksize = _3btol(scsipi_sense.blk_desc.blklen); 1702 st->media_density = scsipi_sense.blk_desc.density; 1703 if (scsipi_sense.header.dev_spec & SMH_DSP_WRITE_PROT) 1704 st->flags |= ST_READONLY; 1705 else 1706 st->flags &= ~ST_READONLY; 1707 SC_DEBUG(periph, SCSIPI_DB3, 1708 ("density code %d, %d-byte blocks, write-%s, ", 1709 st->media_density, st->media_blksize, 1710 st->flags & ST_READONLY ? "protected" : "enabled")); 1711 SC_DEBUG(periph, SCSIPI_DB3, 1712 ("%sbuffered\n", 1713 scsipi_sense.header.dev_spec & SMH_DSP_BUFF_MODE ? "" : "un")); 1714 if (st->page_0_size) 1715 bcopy(scsipi_sense.sense_data, st->sense_data, 1716 st->page_0_size); 1717 periph->periph_flags |= PERIPH_MEDIA_LOADED; 1718 return (0); 1719 } 1720 1721 /* 1722 * Send a filled out parameter structure to the drive to 1723 * set it into the desire modes etc. 1724 */ 1725 int 1726 st_mode_select(st, flags) 1727 struct st_softc *st; 1728 int flags; 1729 { 1730 u_int scsi_select_len; 1731 struct scsi_mode_select cmd; 1732 struct scsi_select { 1733 struct scsi_mode_header header; 1734 struct scsi_blk_desc blk_desc; 1735 u_char sense_data[MAX_PAGE_0_SIZE]; 1736 } scsi_select; 1737 struct scsipi_periph *periph = st->sc_periph; 1738 1739 scsi_select_len = 12 + st->page_0_size; 1740 1741 /* 1742 * This quirk deals with drives that have only one valid mode 1743 * and think this gives them license to reject all mode selects, 1744 * even if the selected mode is the one that is supported. 1745 */ 1746 if (st->quirks & ST_Q_UNIMODAL) { 1747 SC_DEBUG(periph, SCSIPI_DB3, 1748 ("not setting density 0x%x blksize 0x%x\n", 1749 st->density, st->blksize)); 1750 return (0); 1751 } 1752 1753 /* 1754 * Set up for a mode select 1755 */ 1756 bzero(&cmd, sizeof(cmd)); 1757 cmd.opcode = SCSI_MODE_SELECT; 1758 cmd.length = scsi_select_len; 1759 1760 bzero(&scsi_select, scsi_select_len); 1761 scsi_select.header.blk_desc_len = sizeof(struct scsi_blk_desc); 1762 scsi_select.header.dev_spec &= ~SMH_DSP_BUFF_MODE; 1763 scsi_select.blk_desc.density = st->density; 1764 if (st->flags & ST_DONTBUFFER) 1765 scsi_select.header.dev_spec |= SMH_DSP_BUFF_MODE_OFF; 1766 else 1767 scsi_select.header.dev_spec |= SMH_DSP_BUFF_MODE_ON; 1768 if (st->flags & ST_FIXEDBLOCKS) 1769 _lto3b(st->blksize, scsi_select.blk_desc.blklen); 1770 if (st->page_0_size) 1771 bcopy(st->sense_data, scsi_select.sense_data, st->page_0_size); 1772 1773 /* 1774 * do the command 1775 */ 1776 return (scsipi_command(periph, (struct scsipi_generic *)&cmd, 1777 sizeof(cmd), (u_char *)&scsi_select, scsi_select_len, 1778 ST_RETRIES, ST_CTL_TIME, NULL, 1779 flags | XS_CTL_DATA_OUT | XS_CTL_DATA_ONSTACK)); 1780 } 1781 1782 int 1783 st_cmprss(st, onoff) 1784 struct st_softc *st; 1785 int onoff; 1786 { 1787 u_int scsi_dlen; 1788 struct scsi_mode_select mcmd; 1789 struct scsi_mode_sense scmd; 1790 struct scsi_select { 1791 struct scsi_mode_header header; 1792 struct scsi_blk_desc blk_desc; 1793 u_char pdata[max(sizeof(struct scsi_tape_dev_conf_page), 1794 sizeof(struct scsi_tape_dev_compression_page))]; 1795 } scsi_pdata; 1796 struct scsi_tape_dev_conf_page *ptr; 1797 struct scsi_tape_dev_compression_page *cptr; 1798 struct scsipi_periph *periph = st->sc_periph; 1799 int error, ison, flags; 1800 1801 scsi_dlen = sizeof(scsi_pdata); 1802 bzero(&scsi_pdata, scsi_dlen); 1803 1804 /* 1805 * Set up for a mode sense. 1806 * Do DATA COMPRESSION page first. 1807 */ 1808 bzero(&scmd, sizeof(scmd)); 1809 scmd.opcode = SCSI_MODE_SENSE; 1810 scmd.page = SMS_PAGE_CTRL_CURRENT | 0xf; 1811 scmd.length = scsi_dlen; 1812 1813 flags = XS_CTL_SILENT; 1814 1815 /* 1816 * Do the MODE SENSE command... 1817 */ 1818 again: 1819 bzero(&scsi_pdata, scsi_dlen); 1820 error = scsipi_command(periph, 1821 (struct scsipi_generic *)&scmd, sizeof(scmd), 1822 (u_char *)&scsi_pdata, scsi_dlen, 1823 ST_RETRIES, ST_CTL_TIME, NULL, 1824 flags | XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); 1825 1826 if (error) { 1827 if (scmd.byte2 != SMS_DBD) { 1828 scmd.byte2 = SMS_DBD; 1829 goto again; 1830 } 1831 /* 1832 * Try a different page? 1833 */ 1834 if (scmd.page == (SMS_PAGE_CTRL_CURRENT | 0xf)) { 1835 scmd.page = SMS_PAGE_CTRL_CURRENT | 0x10; 1836 scmd.byte2 = 0; 1837 goto again; 1838 } 1839 return (error); 1840 } 1841 1842 if (scsi_pdata.header.blk_desc_len) 1843 ptr = (struct scsi_tape_dev_conf_page *) scsi_pdata.pdata; 1844 else 1845 ptr = (struct scsi_tape_dev_conf_page *) &scsi_pdata.blk_desc; 1846 1847 if ((scmd.page & SMS_PAGE_CODE) == 0xf) { 1848 cptr = (struct scsi_tape_dev_compression_page *) ptr; 1849 ison = (cptr->dce_dcc & DCP_DCE) != 0; 1850 if (onoff) 1851 cptr->dce_dcc |= DCP_DCE; 1852 else 1853 cptr->dce_dcc &= ~DCP_DCE; 1854 cptr->pagecode &= ~0x80; 1855 } else { 1856 ison = (ptr->sel_comp_alg != 0); 1857 if (onoff) 1858 ptr->sel_comp_alg = 1; 1859 else 1860 ptr->sel_comp_alg = 0; 1861 ptr->pagecode &= ~0x80; 1862 ptr->byte2 = 0; 1863 ptr->active_partition = 0; 1864 ptr->wb_full_ratio = 0; 1865 ptr->rb_empty_ratio = 0; 1866 ptr->byte8 &= ~0x30; 1867 ptr->gap_size = 0; 1868 ptr->byte10 &= ~0xe7; 1869 ptr->ew_bufsize[0] = 0; 1870 ptr->ew_bufsize[1] = 0; 1871 ptr->ew_bufsize[2] = 0; 1872 ptr->reserved = 0; 1873 } 1874 onoff = onoff ? 1 : 0; 1875 /* 1876 * There might be a virtue in actually doing the MODE SELECTS, 1877 * but let's not clog the bus over it. 1878 */ 1879 if (onoff == ison) 1880 return (0); 1881 1882 /* 1883 * Set up for a mode select 1884 */ 1885 1886 scsi_pdata.header.data_length = 0; 1887 scsi_pdata.header.medium_type = 0; 1888 if ((st->flags & ST_DONTBUFFER) == 0) 1889 scsi_pdata.header.dev_spec = SMH_DSP_BUFF_MODE_ON; 1890 else 1891 scsi_pdata.header.dev_spec = 0; 1892 1893 bzero(&mcmd, sizeof(mcmd)); 1894 mcmd.opcode = SCSI_MODE_SELECT; 1895 mcmd.byte2 = SMS_PF; 1896 mcmd.length = scsi_dlen; 1897 if (scsi_pdata.header.blk_desc_len) { 1898 scsi_pdata.blk_desc.density = 0; 1899 scsi_pdata.blk_desc.nblocks[0] = 0; 1900 scsi_pdata.blk_desc.nblocks[1] = 0; 1901 scsi_pdata.blk_desc.nblocks[2] = 0; 1902 } 1903 1904 /* 1905 * Do the command 1906 */ 1907 error = scsipi_command(periph, 1908 (struct scsipi_generic *)&mcmd, sizeof(mcmd), 1909 (u_char *)&scsi_pdata, scsi_dlen, 1910 ST_RETRIES, ST_CTL_TIME, NULL, 1911 flags | XS_CTL_DATA_OUT | XS_CTL_DATA_ONSTACK); 1912 1913 if (error && (scmd.page & SMS_PAGE_CODE) == 0xf) { 1914 /* 1915 * Try DEVICE CONFIGURATION page. 1916 */ 1917 scmd.page = SMS_PAGE_CTRL_CURRENT | 0x10; 1918 goto again; 1919 } 1920 return (error); 1921 } 1922 /* 1923 * issue an erase command 1924 */ 1925 int 1926 st_erase(st, full, flags) 1927 struct st_softc *st; 1928 int full, flags; 1929 { 1930 int tmo; 1931 struct scsi_erase cmd; 1932 1933 /* 1934 * Full erase means set LONG bit in erase command, which asks 1935 * the drive to erase the entire unit. Without this bit, we're 1936 * asking the drive to write an erase gap. 1937 */ 1938 bzero(&cmd, sizeof(cmd)); 1939 cmd.opcode = ERASE; 1940 if (full) { 1941 cmd.byte2 = SE_IMMED|SE_LONG; 1942 tmo = ST_SPC_TIME; 1943 } else { 1944 tmo = ST_IO_TIME; 1945 cmd.byte2 = SE_IMMED; 1946 } 1947 1948 /* 1949 * XXX We always do this asynchronously, for now. How long should 1950 * we wait if we want to (eventually) to it synchronously? 1951 */ 1952 return (scsipi_command(st->sc_periph, 1953 (struct scsipi_generic *)&cmd, sizeof(cmd), 1954 0, 0, ST_RETRIES, tmo, NULL, flags)); 1955 } 1956 1957 /* 1958 * skip N blocks/filemarks/seq filemarks/eom 1959 */ 1960 int 1961 st_space(st, number, what, flags) 1962 struct st_softc *st; 1963 u_int what; 1964 int flags; 1965 int number; 1966 { 1967 struct scsi_space cmd; 1968 int error; 1969 1970 switch (what) { 1971 case SP_BLKS: 1972 if (st->flags & ST_PER_ACTION) { 1973 if (number > 0) { 1974 st->flags &= ~ST_PER_ACTION; 1975 return (EIO); 1976 } else if (number < 0) { 1977 if (st->flags & ST_AT_FILEMARK) { 1978 /* 1979 * Handling of ST_AT_FILEMARK 1980 * in st_space will fill in the 1981 * right file mark count. 1982 */ 1983 error = st_space(st, 0, SP_FILEMARKS, 1984 flags); 1985 if (error) 1986 return (error); 1987 } 1988 if (st->flags & ST_BLANK_READ) { 1989 st->flags &= ~ST_BLANK_READ; 1990 return (EIO); 1991 } 1992 st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); 1993 } 1994 } 1995 break; 1996 case SP_FILEMARKS: 1997 if (st->flags & ST_EIO_PENDING) { 1998 if (number > 0) { 1999 /* pretend we just discovered the error */ 2000 st->flags &= ~ST_EIO_PENDING; 2001 return (EIO); 2002 } else if (number < 0) { 2003 /* back away from the error */ 2004 st->flags &= ~ST_EIO_PENDING; 2005 } 2006 } 2007 if (st->flags & ST_AT_FILEMARK) { 2008 st->flags &= ~ST_AT_FILEMARK; 2009 number--; 2010 } 2011 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 2012 /* back away from unwritten tape */ 2013 st->flags &= ~ST_BLANK_READ; 2014 number++; /* XXX dubious */ 2015 } 2016 break; 2017 case SP_EOM: 2018 if (st->flags & ST_EOM_PENDING) { 2019 /* we're already there */ 2020 st->flags &= ~ST_EOM_PENDING; 2021 return (0); 2022 } 2023 if (st->flags & ST_EIO_PENDING) { 2024 /* pretend we just discovered the error */ 2025 st->flags &= ~ST_EIO_PENDING; 2026 return (EIO); 2027 } 2028 if (st->flags & ST_AT_FILEMARK) 2029 st->flags &= ~ST_AT_FILEMARK; 2030 break; 2031 } 2032 if (number == 0) 2033 return (0); 2034 2035 bzero(&cmd, sizeof(cmd)); 2036 cmd.opcode = SPACE; 2037 cmd.byte2 = what; 2038 _lto3b(number, cmd.number); 2039 2040 return (scsipi_command(st->sc_periph, 2041 (struct scsipi_generic *)&cmd, sizeof(cmd), 2042 0, 0, 0, ST_SPC_TIME, NULL, flags)); 2043 } 2044 2045 /* 2046 * write N filemarks 2047 */ 2048 int 2049 st_write_filemarks(st, number, flags) 2050 struct st_softc *st; 2051 int flags; 2052 int number; 2053 { 2054 struct scsi_write_filemarks cmd; 2055 2056 /* 2057 * It's hard to write a negative number of file marks. 2058 * Don't try. 2059 */ 2060 if (number < 0) 2061 return (EINVAL); 2062 switch (number) { 2063 case 0: /* really a command to sync the drive's buffers */ 2064 break; 2065 case 1: 2066 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 2067 st->flags &= ~ST_WRITTEN; 2068 else 2069 st->flags |= ST_FM_WRITTEN; 2070 st->flags &= ~ST_PER_ACTION; 2071 break; 2072 default: 2073 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 2074 } 2075 2076 bzero(&cmd, sizeof(cmd)); 2077 cmd.opcode = WRITE_FILEMARKS; 2078 _lto3b(number, cmd.number); 2079 2080 return (scsipi_command(st->sc_periph, 2081 (struct scsipi_generic *)&cmd, sizeof(cmd), 2082 0, 0, 0, ST_IO_TIME * 4, NULL, flags)); 2083 } 2084 2085 /* 2086 * Make sure the right number of file marks is on tape if the 2087 * tape has been written. If the position argument is true, 2088 * leave the tape positioned where it was originally. 2089 * 2090 * nmarks returns the number of marks to skip (or, if position 2091 * true, which were skipped) to get back original position. 2092 */ 2093 int 2094 st_check_eod(st, position, nmarks, flags) 2095 struct st_softc *st; 2096 boolean position; 2097 int *nmarks; 2098 int flags; 2099 { 2100 int error; 2101 2102 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 2103 default: 2104 *nmarks = 0; 2105 return (0); 2106 case ST_WRITTEN: 2107 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 2108 *nmarks = 1; 2109 break; 2110 case ST_WRITTEN | ST_2FM_AT_EOD: 2111 *nmarks = 2; 2112 } 2113 error = st_write_filemarks(st, *nmarks, flags); 2114 if (position && !error) 2115 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 2116 return (error); 2117 } 2118 2119 /* 2120 * load/unload/retension 2121 */ 2122 int 2123 st_load(st, type, flags) 2124 struct st_softc *st; 2125 u_int type; 2126 int flags; 2127 { 2128 int error; 2129 struct scsi_load cmd; 2130 2131 if (type != LD_LOAD) { 2132 int nmarks; 2133 2134 error = st_check_eod(st, FALSE, &nmarks, flags); 2135 if (error) { 2136 printf("%s: failed to write closing filemarks at " 2137 "unload, errno=%d\n", st->sc_dev.dv_xname, error); 2138 return (error); 2139 } 2140 } 2141 if (st->quirks & ST_Q_IGNORE_LOADS) { 2142 if (type == LD_LOAD) { 2143 /* 2144 * If we ignore loads, at least we should try a rewind. 2145 */ 2146 return st_rewind(st, 0, flags); 2147 } 2148 /* otherwise, we should do what's asked of us */ 2149 } 2150 2151 bzero(&cmd, sizeof(cmd)); 2152 cmd.opcode = LOAD; 2153 cmd.how = type; 2154 2155 error = scsipi_command(st->sc_periph, 2156 (struct scsipi_generic *)&cmd, sizeof(cmd), 2157 0, 0, ST_RETRIES, ST_SPC_TIME, NULL, flags); 2158 if (error) { 2159 printf("%s: error %d in st_load (op %d)\n", 2160 st->sc_dev.dv_xname, error, type); 2161 } 2162 return (error); 2163 } 2164 2165 /* 2166 * Rewind the device 2167 */ 2168 int 2169 st_rewind(st, immediate, flags) 2170 struct st_softc *st; 2171 u_int immediate; 2172 int flags; 2173 { 2174 struct scsi_rewind cmd; 2175 int error; 2176 int nmarks; 2177 2178 error = st_check_eod(st, FALSE, &nmarks, flags); 2179 if (error) { 2180 printf("%s: failed to write closing filemarks at " 2181 "rewind, errno=%d\n", st->sc_dev.dv_xname, error); 2182 return (error); 2183 } 2184 st->flags &= ~ST_PER_ACTION; 2185 2186 bzero(&cmd, sizeof(cmd)); 2187 cmd.opcode = REWIND; 2188 cmd.byte2 = immediate; 2189 2190 error = scsipi_command(st->sc_periph, 2191 (struct scsipi_generic *)&cmd, sizeof(cmd), 0, 0, ST_RETRIES, 2192 immediate ? ST_CTL_TIME: ST_SPC_TIME, NULL, flags); 2193 if (error) { 2194 printf("%s: error %d trying to rewind\n", 2195 st->sc_dev.dv_xname, error); 2196 } 2197 return (error); 2198 } 2199 2200 int 2201 st_rdpos(st, hard, blkptr) 2202 struct st_softc *st; 2203 int hard; 2204 u_int32_t *blkptr; 2205 { 2206 int error; 2207 u_int8_t posdata[20]; 2208 struct scsi_tape_read_position cmd; 2209 2210 /* 2211 * First flush any pending writes... 2212 */ 2213 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 2214 2215 /* 2216 * The latter case is for 'write protected' tapes 2217 * which are too stupid to recognize a zero count 2218 * for writing filemarks as a no-op. 2219 */ 2220 if (error != 0 && error != EACCES && error != EROFS) 2221 return (error); 2222 2223 bzero(&cmd, sizeof(cmd)); 2224 bzero(&posdata, sizeof(posdata)); 2225 cmd.opcode = READ_POSITION; 2226 if (hard) 2227 cmd.byte1 = 1; 2228 2229 error = scsipi_command(st->sc_periph, 2230 (struct scsipi_generic *)&cmd, sizeof(cmd), (u_char *)&posdata, 2231 sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, 2232 XS_CTL_SILENT | XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); 2233 2234 if (error == 0) { 2235 #if 0 2236 printf("posdata:"); 2237 for (hard = 0; hard < sizeof(posdata); hard++) 2238 printf("%02x ", posdata[hard] & 0xff); 2239 printf("\n"); 2240 #endif 2241 if (posdata[0] & 0x4) /* Block Position Unknown */ 2242 error = EINVAL; 2243 else 2244 *blkptr = _4btol(&posdata[4]); 2245 } 2246 return (error); 2247 } 2248 2249 int 2250 st_setpos(st, hard, blkptr) 2251 struct st_softc *st; 2252 int hard; 2253 u_int32_t *blkptr; 2254 { 2255 int error; 2256 struct scsi_tape_locate cmd; 2257 2258 /* 2259 * First flush any pending writes. Strictly speaking, 2260 * we're not supposed to have to worry about this, 2261 * but let's be untrusting. 2262 */ 2263 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 2264 2265 /* 2266 * The latter case is for 'write protected' tapes 2267 * which are too stupid to recognize a zero count 2268 * for writing filemarks as a no-op. 2269 */ 2270 if (error != 0 && error != EACCES && error != EROFS) 2271 return (error); 2272 2273 bzero(&cmd, sizeof(cmd)); 2274 cmd.opcode = LOCATE; 2275 if (hard) 2276 cmd.byte2 = 1 << 2; 2277 _lto4b(*blkptr, cmd.blkaddr); 2278 error = scsipi_command(st->sc_periph, 2279 (struct scsipi_generic *)&cmd, sizeof(cmd), 2280 NULL, 0, ST_RETRIES, ST_SPC_TIME, NULL, 0); 2281 /* 2282 * XXX: Note file && block number position now unknown (if 2283 * XXX: these things ever start being maintained in this driver) 2284 */ 2285 return (error); 2286 } 2287 2288 2289 /* 2290 * Look at the returned sense and act on the error and determine 2291 * the unix error number to pass back..., 0 (== report no error), 2292 * -1 = retry the operation, -2 continue error processing. 2293 */ 2294 int 2295 st_interpret_sense(xs) 2296 struct scsipi_xfer *xs; 2297 { 2298 struct scsipi_periph *periph = xs->xs_periph; 2299 struct scsipi_sense_data *sense = &xs->sense.scsi_sense; 2300 struct buf *bp = xs->bp; 2301 struct st_softc *st = (void *)periph->periph_dev; 2302 int retval = EJUSTRETURN; 2303 int doprint = ((xs->xs_control & XS_CTL_SILENT) == 0); 2304 u_int8_t key; 2305 int32_t info; 2306 2307 /* 2308 * If it isn't a extended or extended/deferred error, let 2309 * the generic code handle it. 2310 */ 2311 if ((sense->error_code & SSD_ERRCODE) != 0x70 && 2312 (sense->error_code & SSD_ERRCODE) != 0x71) { /* DEFFERRED */ 2313 return (retval); 2314 } 2315 2316 if (sense->error_code & SSD_ERRCODE_VALID) 2317 info = _4btol(sense->info); 2318 else 2319 info = xs->datalen; /* bad choice if fixed blocks */ 2320 key = sense->flags & SSD_KEY; 2321 st->mt_erreg = key; 2322 st->asc = sense->add_sense_code; 2323 st->ascq = sense->add_sense_code_qual; 2324 st->mt_resid = (short) info; 2325 2326 /* 2327 * If the device is not open yet, let generic handle 2328 */ 2329 if ((periph->periph_flags & PERIPH_OPEN) == 0) { 2330 return (retval); 2331 } 2332 2333 2334 if (st->flags & ST_FIXEDBLOCKS) { 2335 xs->resid = info * st->blksize; 2336 if (sense->flags & SSD_EOM) { 2337 if ((st->flags & ST_EARLYWARN) == 0) 2338 st->flags |= ST_EIO_PENDING; 2339 st->flags |= ST_EOM_PENDING; 2340 if (bp) 2341 bp->b_resid = xs->resid; 2342 } 2343 if (sense->flags & SSD_FILEMARK) { 2344 st->flags |= ST_AT_FILEMARK; 2345 if (bp) 2346 bp->b_resid = xs->resid; 2347 } 2348 if (sense->flags & SSD_ILI) { 2349 st->flags |= ST_EIO_PENDING; 2350 if (bp) 2351 bp->b_resid = xs->resid; 2352 if (sense->error_code & SSD_ERRCODE_VALID && 2353 (xs->xs_control & XS_CTL_SILENT) == 0) 2354 printf("%s: block wrong size, %d blocks " 2355 "residual\n", st->sc_dev.dv_xname, info); 2356 2357 /* 2358 * This quirk code helps the drive read 2359 * the first tape block, regardless of 2360 * format. That is required for these 2361 * drives to return proper MODE SENSE 2362 * information. 2363 */ 2364 if ((st->quirks & ST_Q_SENSE_HELP) && 2365 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) 2366 st->blksize -= 512; 2367 } 2368 /* 2369 * If data wanted and no data was tranfered, do it immediatly 2370 */ 2371 if (xs->datalen && xs->resid >= xs->datalen) { 2372 if (st->flags & ST_EIO_PENDING) 2373 return (EIO); 2374 if (st->flags & ST_AT_FILEMARK) { 2375 if (bp) 2376 bp->b_resid = xs->resid; 2377 return (0); 2378 } 2379 } 2380 } else { /* must be variable mode */ 2381 if (sense->flags & SSD_EOM) { 2382 /* 2383 * The current semantics of this 2384 * driver requires EOM detection 2385 * to return EIO unless early 2386 * warning detection is enabled 2387 * for variable mode (this is always 2388 * on for fixed block mode). 2389 */ 2390 if (st->flags & ST_EARLYWARN) { 2391 st->flags |= ST_EOM_PENDING; 2392 retval = 0; 2393 } else { 2394 retval = EIO; 2395 } 2396 2397 /* 2398 * If it's an unadorned EOM detection, 2399 * suppress printing an error. 2400 */ 2401 if (key == SKEY_NO_SENSE) { 2402 doprint = 0; 2403 } 2404 } else if (sense->flags & SSD_FILEMARK) { 2405 retval = 0; 2406 } else if (sense->flags & SSD_ILI) { 2407 if (info < 0) { 2408 /* 2409 * The tape record was bigger than the read 2410 * we issued. 2411 */ 2412 if ((xs->xs_control & XS_CTL_SILENT) == 0) { 2413 printf("%s: %d-byte tape record too big" 2414 " for %d-byte user buffer\n", 2415 st->sc_dev.dv_xname, 2416 xs->datalen - info, xs->datalen); 2417 } 2418 retval = EIO; 2419 } else { 2420 retval = 0; 2421 } 2422 } 2423 xs->resid = info; 2424 if (bp) 2425 bp->b_resid = info; 2426 } 2427 2428 #ifdef SCSIPI_DEBUG 2429 if (retval == 0 && key == SKEY_NO_SENSE) 2430 doprint = 0; 2431 #endif 2432 if (key == SKEY_BLANK_CHECK) { 2433 /* 2434 * This quirk code helps the drive read the 2435 * first tape block, regardless of format. That 2436 * is required for these drives to return proper 2437 * MODE SENSE information. 2438 */ 2439 if ((st->quirks & ST_Q_SENSE_HELP) && 2440 (periph->periph_flags & PERIPH_MEDIA_LOADED) == 0) { 2441 /* still starting */ 2442 st->blksize -= 512; 2443 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 2444 st->flags |= ST_BLANK_READ; 2445 xs->resid = xs->datalen; 2446 if (bp) { 2447 bp->b_resid = xs->resid; 2448 /* return an EOF */ 2449 } 2450 retval = 0; 2451 } 2452 } 2453 #ifdef SCSIVERBOSE 2454 if (doprint) { 2455 scsipi_print_sense(xs, 0); 2456 } 2457 #else 2458 if (doprint) { 2459 scsipi_printaddr(periph); 2460 printf("Sense Key 0x%02x", key); 2461 if ((sense->error_code & SSD_ERRCODE_VALID) != 0) { 2462 switch (key) { 2463 case SKEY_NOT_READY: 2464 case SKEY_ILLEGAL_REQUEST: 2465 case SKEY_UNIT_ATTENTION: 2466 case SKEY_WRITE_PROTECT: 2467 break; 2468 case SKEY_BLANK_CHECK: 2469 printf(", requested size: %d (decimal)", info); 2470 break; 2471 case SKEY_ABORTED_COMMAND: 2472 if (xs->retries) 2473 printf(", retrying"); 2474 printf(", cmd 0x%x, info 0x%x", 2475 xs->cmd->opcode, info); 2476 break; 2477 default: 2478 printf(", info = %d (decimal)", info); 2479 } 2480 } 2481 if (sense->extra_len != 0) { 2482 int n; 2483 printf(", data ="); 2484 for (n = 0; n < sense->extra_len; n++) 2485 printf(" %02x", sense->cmd_spec_info[n]); 2486 } 2487 printf("\n"); 2488 } 2489 #endif 2490 return (retval); 2491 } 2492 2493 /* 2494 * The quirk here is that the drive returns some value to st_mode_sense 2495 * incorrectly until the tape has actually passed by the head. 2496 * 2497 * The method is to set the drive to large fixed-block state (user-specified 2498 * density and 1024-byte blocks), then read and rewind to get it to sense the 2499 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 2500 * work, as a last resort, try variable- length blocks. The result will be 2501 * the ability to do an accurate st_mode_sense. 2502 * 2503 * We know we can do a rewind because we just did a load, which implies rewind. 2504 * Rewind seems preferable to space backward if we have a virgin tape. 2505 * 2506 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 2507 * error processing, both part of st_interpret_sense. 2508 */ 2509 int 2510 st_touch_tape(st) 2511 struct st_softc *st; 2512 { 2513 char *buf; 2514 int readsize; 2515 int error; 2516 2517 buf = malloc(1024, M_TEMP, M_NOWAIT); 2518 if (buf == NULL) 2519 return (ENOMEM); 2520 2521 if ((error = st_mode_sense(st, 0)) != 0) 2522 goto bad; 2523 st->blksize = 1024; 2524 do { 2525 switch (st->blksize) { 2526 case 512: 2527 case 1024: 2528 readsize = st->blksize; 2529 st->flags |= ST_FIXEDBLOCKS; 2530 break; 2531 default: 2532 readsize = 1; 2533 st->flags &= ~ST_FIXEDBLOCKS; 2534 } 2535 if ((error = st_mode_select(st, 0)) != 0) 2536 goto bad; 2537 st_read(st, buf, readsize, XS_CTL_SILENT); /* XXX */ 2538 if ((error = st_rewind(st, 0, 0)) != 0) { 2539 bad: free(buf, M_TEMP); 2540 return (error); 2541 } 2542 } while (readsize != 1 && readsize > st->blksize); 2543 2544 free(buf, M_TEMP); 2545 return (0); 2546 } 2547 2548 int 2549 stdump(dev, blkno, va, size) 2550 dev_t dev; 2551 daddr_t blkno; 2552 caddr_t va; 2553 size_t size; 2554 { 2555 2556 /* Not implemented. */ 2557 return (ENXIO); 2558 } 2559
Indexes created Sat Sep 27 22:09:54 GMT 2025