st.c revision 1.128
1 /* $NetBSD: st.c,v 1.128 2000/11/02 13:12:58 pk 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_link *sc_link; /* our link to the adapter 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((dev_t, int)); 367 void st_unmount __P((struct st_softc *, boolean)); 368 int st_decide_mode __P((struct st_softc *, boolean)); 369 void ststart __P((void *)); 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 struct scsipi_device 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_link *sc_link = sa->sa_sc_link; 464 465 SC_DEBUG(sc_link, SDEV_DB2, ("stattach: ")); 466 467 /* 468 * Store information needed to contact our base driver 469 */ 470 st->sc_link = sc_link; 471 sc_link->device = &st_switch; 472 sc_link->device_softc = st; 473 sc_link->openings = 1; 474 475 /* 476 * Set initial flags 477 */ 478 479 st->flags = ST_INIT_FLAGS; 480 481 /* 482 * Check if the drive is a known criminal and take 483 * Any steps needed to bring it into line 484 */ 485 st_identify_drive(st, &sa->sa_inqbuf); 486 /* 487 * Use the subdriver to request information regarding 488 * the drive. We cannot use interrupts yet, so the 489 * request must specify this. 490 */ 491 printf("\n"); 492 printf("%s: %s", st->sc_dev.dv_xname, st->quirkdata ? "rogue, " : ""); 493 if (scsipi_test_unit_ready(sc_link, 494 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE) || 495 st_mode_sense(st, 496 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE)) 497 printf("drive empty\n"); 498 else { 499 printf("density code %d, ", st->media_density); 500 if (st->media_blksize > 0) 501 printf("%d-byte", st->media_blksize); 502 else 503 printf("variable"); 504 printf(" blocks, write-%s\n", 505 (st->flags & ST_READONLY) ? "protected" : "enabled"); 506 } 507 508 /* 509 * Set up the buf queue for this device 510 */ 511 BUFQ_INIT(&st->buf_queue); 512 513 #if NRND > 0 514 rnd_attach_source(&st->rnd_source, st->sc_dev.dv_xname, 515 RND_TYPE_TAPE, 0); 516 #endif 517 } 518 519 /* 520 * Use the inquiry routine in 'scsi_base' to get drive info so we can 521 * Further tailor our behaviour. 522 */ 523 void 524 st_identify_drive(st, inqbuf) 525 struct st_softc *st; 526 struct scsipi_inquiry_pattern *inqbuf; 527 { 528 struct st_quirk_inquiry_pattern *finger; 529 int priority; 530 531 finger = (struct st_quirk_inquiry_pattern *)scsipi_inqmatch(inqbuf, 532 (caddr_t)st_quirk_patterns, 533 sizeof(st_quirk_patterns) / sizeof(st_quirk_patterns[0]), 534 sizeof(st_quirk_patterns[0]), &priority); 535 if (priority != 0) { 536 st->quirkdata = &finger->quirkdata; 537 st->drive_quirks = finger->quirkdata.quirks; 538 st->quirks = finger->quirkdata.quirks; /* start value */ 539 st->page_0_size = finger->quirkdata.page_0_size; 540 st_loadquirks(st); 541 } 542 } 543 544 /* 545 * initialise the subdevices to the default (QUIRK) state. 546 * this will remove any setting made by the system operator or previous 547 * operations. 548 */ 549 void 550 st_loadquirks(st) 551 struct st_softc *st; 552 { 553 int i; 554 struct modes *mode; 555 struct modes *mode2; 556 557 mode = st->quirkdata->modes; 558 mode2 = st->modes; 559 for (i = 0; i < 4; i++) { 560 bzero(mode2, sizeof(struct modes)); 561 st->modeflags[i] &= ~(BLKSIZE_SET_BY_QUIRK | 562 DENSITY_SET_BY_QUIRK | BLKSIZE_SET_BY_USER | 563 DENSITY_SET_BY_USER); 564 if ((mode->quirks | st->drive_quirks) & ST_Q_FORCE_BLKSIZE) { 565 mode2->blksize = mode->blksize; 566 st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; 567 } 568 if (mode->density) { 569 mode2->density = mode->density; 570 st->modeflags[i] |= DENSITY_SET_BY_QUIRK; 571 } 572 mode2->quirks |= mode->quirks; 573 mode++; 574 mode2++; 575 } 576 } 577 578 /* 579 * open the device. 580 */ 581 int 582 stopen(dev, flags, mode, p) 583 dev_t dev; 584 int flags; 585 int mode; 586 struct proc *p; 587 { 588 u_int stmode, dsty; 589 int error, sflags, unit, tries, ntries; 590 struct st_softc *st; 591 struct scsipi_link *sc_link; 592 593 unit = STUNIT(dev); 594 if (unit >= st_cd.cd_ndevs) 595 return (ENXIO); 596 st = st_cd.cd_devs[unit]; 597 if (st == NULL) 598 return (ENXIO); 599 600 stmode = STMODE(dev); 601 dsty = STDSTY(dev); 602 sc_link = st->sc_link; 603 604 SC_DEBUG(sc_link, SDEV_DB1, ("open: dev=0x%x (unit %d (of %d))\n", dev, 605 unit, st_cd.cd_ndevs)); 606 607 608 /* 609 * Only allow one at a time 610 */ 611 if (sc_link->flags & SDEV_OPEN) { 612 printf("%s: already open\n", st->sc_dev.dv_xname); 613 return (EBUSY); 614 } 615 616 if ((error = scsipi_adapter_addref(sc_link)) != 0) 617 return (error); 618 619 /* 620 * clear any latched errors. 621 */ 622 st->mt_resid = 0; 623 st->mt_erreg = 0; 624 st->asc = 0; 625 st->ascq = 0; 626 627 /* 628 * Catch any unit attention errors. Be silent about this 629 * unless we're already mounted. We ignore media change 630 * if we're in control mode or not mounted yet. 631 */ 632 if ((st->flags & ST_MOUNTED) == 0 || stmode == CTRL_MODE) { 633 #ifdef SCSIDEBUG 634 sflags = XS_CTL_IGNORE_MEDIA_CHANGE; 635 #else 636 sflags = XS_CTL_SILENT|XS_CTL_IGNORE_MEDIA_CHANGE; 637 #endif 638 } else 639 sflags = 0; 640 641 /* 642 * If we're already mounted or we aren't configured for 643 * a mount delay, only try a test unit ready once. Otherwise, 644 * try up to ST_MOUNT_DELAY times with a rest interval of 645 * one second between each try. 646 */ 647 648 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0) { 649 ntries = 1; 650 } else { 651 ntries = ST_MOUNT_DELAY; 652 } 653 654 for (error = tries = 0; tries < ntries; tries++) { 655 int slpintr, oflags; 656 657 /* 658 * If we had no error, or we're opening the control mode 659 * device, we jump out right away. 660 */ 661 662 error = scsipi_test_unit_ready(sc_link, sflags); 663 if (error == 0 || stmode == CTRL_MODE) { 664 break; 665 } 666 667 /* 668 * We had an error. 669 * 670 * If we're already mounted or we aren't configured for 671 * a mount delay, or the error isn't a NOT READY error, 672 * skip to the error exit now. 673 */ 674 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0 || 675 (st->mt_key != SKEY_NOT_READY)) { 676 goto bad; 677 } 678 679 /* 680 * clear any latched errors. 681 */ 682 st->mt_resid = 0; 683 st->mt_erreg = 0; 684 st->asc = 0; 685 st->ascq = 0; 686 687 /* 688 * Fake that we have the device open so 689 * we block other apps from getting in. 690 */ 691 692 oflags = sc_link->flags; 693 sc_link->flags |= SDEV_OPEN; 694 695 slpintr = tsleep(&lbolt, PUSER|PCATCH, "stload", 0); 696 697 sc_link->flags = oflags; /* restore flags */ 698 699 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 sc_link->flags |= SDEV_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 sc_link->flags |= SDEV_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 || !(sc_link->flags & SDEV_MEDIA_LOADED)) 739 st_unmount(st, NOEJECT); 740 741 /* 742 * If we are not mounted, then we should start a new 743 * mount session. 744 */ 745 if (!(st->flags & ST_MOUNTED)) { 746 st_mount_tape(dev, flags); 747 st->last_dsty = dsty; 748 } 749 750 SC_DEBUG(sc_link, SDEV_DB2, ("open complete\n")); 751 return (0); 752 753 bad: 754 st_unmount(st, NOEJECT); 755 scsipi_adapter_delref(sc_link); 756 sc_link->flags &= ~SDEV_OPEN; 757 return (error); 758 } 759 760 /* 761 * close the device.. only called if we are the LAST 762 * occurence of an open device 763 */ 764 int 765 stclose(dev, flags, mode, p) 766 dev_t dev; 767 int flags; 768 int mode; 769 struct proc *p; 770 { 771 int stxx, error = 0; 772 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 773 774 SC_DEBUG(st->sc_link, SDEV_DB1, ("closing\n")); 775 776 /* 777 * Make sure that a tape opened in write-only mode will have 778 * file marks written on it when closed, even if not written to. 779 * 780 * This is for SUN compatibility. Actually, the Sun way of 781 * things is to: 782 * 783 * only write filemarks if there are fmks to be written and 784 * - open for write (possibly read/write) 785 * - the last operation was a write 786 * or: 787 * - opened for wronly 788 * - no data was written (including filemarks) 789 */ 790 791 stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); 792 if (((flags & FWRITE) && stxx == ST_WRITTEN) || 793 ((flags & O_ACCMODE) == FWRITE && stxx == 0)) { 794 int nm; 795 error = st_check_eod(st, FALSE, &nm, 0); 796 } 797 798 switch (STMODE(dev)) { 799 case NORMAL_MODE: 800 st_unmount(st, NOEJECT); 801 break; 802 case NOREW_MODE: 803 case CTRL_MODE: 804 /* 805 * Leave mounted unless media seems to have been removed. 806 * 807 * Otherwise, if we're to terminate a tape with more than one 808 * filemark [ and because we're not rewinding here ], backspace 809 * one filemark so that later appends will see an unbroken 810 * sequence of: 811 * 812 * file - FMK - file - FMK ... file - FMK FMK (EOM) 813 */ 814 if (!(st->sc_link->flags & SDEV_MEDIA_LOADED)) { 815 st_unmount(st, NOEJECT); 816 } else if (error == 0) { 817 /* 818 * ST_WRITTEN was preserved from above. 819 * 820 * All we need to know here is: 821 * 822 * Were we writing this tape and was the last 823 * operation a write? 824 * 825 * Are there supposed to be 2FM at EOD? 826 * 827 * If both statements are true, then we backspace 828 * one filemark. 829 */ 830 stxx |= (st->flags & ST_2FM_AT_EOD); 831 if ((flags & FWRITE) != 0 && 832 (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { 833 error = st_space(st, -1, SP_FILEMARKS, 0); 834 } 835 } 836 break; 837 case EJECT_MODE: 838 st_unmount(st, EJECT); 839 break; 840 } 841 842 scsipi_wait_drain(st->sc_link); 843 844 scsipi_adapter_delref(st->sc_link); 845 st->sc_link->flags &= ~SDEV_OPEN; 846 847 return (error); 848 } 849 850 /* 851 * Start a new mount session. 852 * Copy in all the default parameters from the selected device mode. 853 * and try guess any that seem to be defaulted. 854 */ 855 int 856 st_mount_tape(dev, flags) 857 dev_t dev; 858 int flags; 859 { 860 int unit; 861 u_int dsty; 862 struct st_softc *st; 863 struct scsipi_link *sc_link; 864 int error = 0; 865 866 unit = STUNIT(dev); 867 dsty = STDSTY(dev); 868 st = st_cd.cd_devs[unit]; 869 sc_link = st->sc_link; 870 871 if (st->flags & ST_MOUNTED) 872 return (0); 873 874 SC_DEBUG(sc_link, SDEV_DB1, ("mounting\n ")); 875 st->flags |= ST_NEW_MOUNT; 876 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 877 /* 878 * If the media is new, then make sure we give it a chance to 879 * to do a 'load' instruction. (We assume it is new.) 880 */ 881 if ((error = st_load(st, LD_LOAD, XS_CTL_SILENT)) != 0) 882 return (error); 883 /* 884 * Throw another dummy instruction to catch 885 * 'Unit attention' errors. Many drives give 886 * these after doing a Load instruction (with 887 * the MEDIUM MAY HAVE CHANGED asc/ascq). 888 */ 889 scsipi_test_unit_ready(sc_link, XS_CTL_SILENT); /* XXX */ 890 891 /* 892 * Some devices can't tell you much until they have been 893 * asked to look at the media. This quirk does this. 894 */ 895 if (st->quirks & ST_Q_SENSE_HELP) 896 if ((error = st_touch_tape(st)) != 0) 897 return (error); 898 /* 899 * Load the physical device parameters 900 * loads: blkmin, blkmax 901 */ 902 if ((error = st_read_block_limits(st, 0)) != 0) 903 return (error); 904 /* 905 * Load the media dependent parameters 906 * includes: media_blksize,media_density,numblks 907 * As we have a tape in, it should be reflected here. 908 * If not you may need the "quirk" above. 909 */ 910 if ((error = st_mode_sense(st, 0)) != 0) 911 return (error); 912 /* 913 * If we have gained a permanent density from somewhere, 914 * then use it in preference to the one supplied by 915 * default by the driver. 916 */ 917 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 918 st->density = st->modes[dsty].density; 919 else 920 st->density = st->media_density; 921 /* 922 * If we have gained a permanent blocksize 923 * then use it in preference to the one supplied by 924 * default by the driver. 925 */ 926 st->flags &= ~ST_FIXEDBLOCKS; 927 if (st->modeflags[dsty] & 928 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 929 st->blksize = st->modes[dsty].blksize; 930 if (st->blksize) 931 st->flags |= ST_FIXEDBLOCKS; 932 } else { 933 if ((error = st_decide_mode(st, FALSE)) != 0) 934 return (error); 935 } 936 if ((error = st_mode_select(st, 0)) != 0) { 937 printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); 938 return (error); 939 } 940 if (!(st->quirks & ST_Q_NOPREVENT)) { 941 scsipi_prevent(sc_link, PR_PREVENT, 942 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 943 } 944 st->flags &= ~ST_NEW_MOUNT; 945 st->flags |= ST_MOUNTED; 946 sc_link->flags |= SDEV_MEDIA_LOADED; /* move earlier? */ 947 948 return (0); 949 } 950 951 /* 952 * End the present mount session. 953 * Rewind, and optionally eject the tape. 954 * Reset various flags to indicate that all new 955 * operations require another mount operation 956 */ 957 void 958 st_unmount(st, eject) 959 struct st_softc *st; 960 boolean eject; 961 { 962 struct scsipi_link *sc_link = st->sc_link; 963 int nmarks; 964 965 if (!(st->flags & ST_MOUNTED)) 966 return; 967 SC_DEBUG(sc_link, SDEV_DB1, ("unmounting\n")); 968 st_check_eod(st, FALSE, &nmarks, XS_CTL_IGNORE_NOT_READY); 969 st_rewind(st, 0, XS_CTL_IGNORE_NOT_READY); 970 scsipi_prevent(sc_link, PR_ALLOW, 971 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 972 if (eject) 973 st_load(st, LD_UNLOAD, XS_CTL_IGNORE_NOT_READY); 974 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 975 sc_link->flags &= ~SDEV_MEDIA_LOADED; 976 } 977 978 /* 979 * Given all we know about the device, media, mode, 'quirks' and 980 * initial operation, make a decision as to how we should be set 981 * to run (regarding blocking and EOD marks) 982 */ 983 int 984 st_decide_mode(st, first_read) 985 struct st_softc *st; 986 boolean first_read; 987 { 988 #ifdef SCSIDEBUG 989 struct scsipi_link *sc_link = st->sc_link; 990 #endif 991 992 SC_DEBUG(sc_link, SDEV_DB2, ("starting block mode decision\n")); 993 994 /* 995 * If the drive can only handle fixed-length blocks and only at 996 * one size, perhaps we should just do that. 997 */ 998 if (st->blkmin && (st->blkmin == st->blkmax)) { 999 st->flags |= ST_FIXEDBLOCKS; 1000 st->blksize = st->blkmin; 1001 SC_DEBUG(sc_link, SDEV_DB3, 1002 ("blkmin == blkmax of %d\n", st->blkmin)); 1003 goto done; 1004 } 1005 /* 1006 * If the tape density mandates (or even suggests) use of fixed 1007 * or variable-length blocks, comply. 1008 */ 1009 switch (st->density) { 1010 case HALFINCH_800: 1011 case HALFINCH_1600: 1012 case HALFINCH_6250: 1013 case DDS: 1014 st->flags &= ~ST_FIXEDBLOCKS; 1015 st->blksize = 0; 1016 SC_DEBUG(sc_link, SDEV_DB3, ("density specified variable\n")); 1017 goto done; 1018 case QIC_11: 1019 case QIC_24: 1020 case QIC_120: 1021 case QIC_150: 1022 case QIC_525: 1023 case QIC_1320: 1024 case QIC_3095: 1025 case QIC_3220: 1026 st->flags |= ST_FIXEDBLOCKS; 1027 if (st->media_blksize > 0) 1028 st->blksize = st->media_blksize; 1029 else 1030 st->blksize = DEF_FIXED_BSIZE; 1031 SC_DEBUG(sc_link, SDEV_DB3, ("density specified fixed\n")); 1032 goto done; 1033 } 1034 /* 1035 * If we're about to read the tape, perhaps we should choose 1036 * fixed or variable-length blocks and block size according to 1037 * what the drive found on the tape. 1038 */ 1039 if (first_read && 1040 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 1041 (st->media_blksize == DEF_FIXED_BSIZE) || 1042 (st->media_blksize == 1024))) { 1043 if (st->media_blksize > 0) 1044 st->flags |= ST_FIXEDBLOCKS; 1045 else 1046 st->flags &= ~ST_FIXEDBLOCKS; 1047 st->blksize = st->media_blksize; 1048 SC_DEBUG(sc_link, SDEV_DB3, 1049 ("Used media_blksize of %d\n", st->media_blksize)); 1050 goto done; 1051 } 1052 /* 1053 * We're getting no hints from any direction. Choose variable- 1054 * length blocks arbitrarily. 1055 */ 1056 st->flags &= ~ST_FIXEDBLOCKS; 1057 st->blksize = 0; 1058 SC_DEBUG(sc_link, SDEV_DB3, 1059 ("Give up and default to variable mode\n")); 1060 1061 done: 1062 /* 1063 * Decide whether or not to write two file marks to signify end- 1064 * of-data. Make the decision as a function of density. If 1065 * the decision is not to use a second file mark, the SCSI BLANK 1066 * CHECK condition code will be recognized as end-of-data when 1067 * first read. 1068 * (I think this should be a by-product of fixed/variable..julian) 1069 */ 1070 switch (st->density) { 1071 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 1072 case QIC_11: 1073 case QIC_24: 1074 case QIC_120: 1075 case QIC_150: 1076 case QIC_525: 1077 case QIC_1320: 1078 case QIC_3095: 1079 case QIC_3220: 1080 st->flags &= ~ST_2FM_AT_EOD; 1081 break; 1082 default: 1083 st->flags |= ST_2FM_AT_EOD; 1084 } 1085 return (0); 1086 } 1087 1088 /* 1089 * Actually translate the requested transfer into 1090 * one the physical driver can understand 1091 * The transfer is described by a buf and will include 1092 * only one physical transfer. 1093 */ 1094 void 1095 ststrategy(bp) 1096 struct buf *bp; 1097 { 1098 struct st_softc *st = st_cd.cd_devs[STUNIT(bp->b_dev)]; 1099 int s; 1100 1101 SC_DEBUG(st->sc_link, SDEV_DB1, 1102 ("ststrategy %ld bytes @ blk %d\n", bp->b_bcount, bp->b_blkno)); 1103 /* 1104 * If it's a null transfer, return immediatly 1105 */ 1106 if (bp->b_bcount == 0) 1107 goto done; 1108 1109 /* If offset is negative, error */ 1110 if (bp->b_blkno < 0) { 1111 bp->b_error = EINVAL; 1112 goto bad; 1113 } 1114 1115 /* 1116 * Odd sized request on fixed drives are verboten 1117 */ 1118 if (st->flags & ST_FIXEDBLOCKS) { 1119 if (bp->b_bcount % st->blksize) { 1120 printf("%s: bad request, must be multiple of %d\n", 1121 st->sc_dev.dv_xname, st->blksize); 1122 bp->b_error = EIO; 1123 goto bad; 1124 } 1125 } 1126 /* 1127 * as are out-of-range requests on variable drives. 1128 */ 1129 else if (bp->b_bcount < st->blkmin || 1130 (st->blkmax && bp->b_bcount > st->blkmax)) { 1131 printf("%s: bad request, must be between %d and %d\n", 1132 st->sc_dev.dv_xname, st->blkmin, st->blkmax); 1133 bp->b_error = EIO; 1134 goto bad; 1135 } 1136 s = splbio(); 1137 1138 /* 1139 * Place it in the queue of activities for this tape 1140 * at the end (a bit silly because we only have on user.. 1141 * (but it could fork())) 1142 */ 1143 BUFQ_INSERT_TAIL(&st->buf_queue, bp); 1144 1145 /* 1146 * Tell the device to get going on the transfer if it's 1147 * not doing anything, otherwise just wait for completion 1148 * (All a bit silly if we're only allowing 1 open but..) 1149 */ 1150 ststart(st); 1151 1152 splx(s); 1153 return; 1154 bad: 1155 bp->b_flags |= B_ERROR; 1156 done: 1157 /* 1158 * Correctly set the buf to indicate a completed xfer 1159 */ 1160 bp->b_resid = bp->b_bcount; 1161 biodone(bp); 1162 return; 1163 } 1164 1165 /* 1166 * ststart looks to see if there is a buf waiting for the device 1167 * and that the device is not already busy. If both are true, 1168 * It dequeues the buf and creates a scsi command to perform the 1169 * transfer required. The transfer request will call scsipi_done 1170 * on completion, which will in turn call this routine again 1171 * so that the next queued transfer is performed. 1172 * The bufs are queued by the strategy routine (ststrategy) 1173 * 1174 * This routine is also called after other non-queued requests 1175 * have been made of the scsi driver, to ensure that the queue 1176 * continues to be drained. 1177 * ststart() is called at splbio 1178 */ 1179 void 1180 ststart(v) 1181 void *v; 1182 { 1183 struct st_softc *st = v; 1184 struct scsipi_link *sc_link = st->sc_link; 1185 struct buf *bp; 1186 struct scsi_rw_tape cmd; 1187 int flags, error; 1188 1189 SC_DEBUG(sc_link, SDEV_DB2, ("ststart ")); 1190 /* 1191 * See if there is a buf to do and we are not already 1192 * doing one 1193 */ 1194 while (sc_link->active < sc_link->openings) { 1195 /* if a special awaits, let it proceed first */ 1196 if (sc_link->flags & SDEV_WAITING) { 1197 sc_link->flags &= ~SDEV_WAITING; 1198 wakeup((caddr_t)sc_link); 1199 return; 1200 } 1201 1202 if ((bp = BUFQ_FIRST(&st->buf_queue)) == NULL) 1203 return; 1204 BUFQ_REMOVE(&st->buf_queue, bp); 1205 1206 /* 1207 * If the device has been unmounted by the user 1208 * then throw away all requests until done. 1209 */ 1210 if (!(st->flags & ST_MOUNTED) || 1211 !(sc_link->flags & SDEV_MEDIA_LOADED)) { 1212 /* make sure that one implies the other.. */ 1213 sc_link->flags &= ~SDEV_MEDIA_LOADED; 1214 bp->b_flags |= B_ERROR; 1215 bp->b_error = EIO; 1216 bp->b_resid = bp->b_bcount; 1217 biodone(bp); 1218 continue; 1219 } 1220 /* 1221 * only FIXEDBLOCK devices have pending I/O or space operations. 1222 */ 1223 if (st->flags & ST_FIXEDBLOCKS) { 1224 /* 1225 * If we are at a filemark but have not reported it yet 1226 * then we should report it now 1227 */ 1228 if (st->flags & ST_AT_FILEMARK) { 1229 if ((bp->b_flags & B_READ) == B_WRITE) { 1230 /* 1231 * Handling of ST_AT_FILEMARK in 1232 * st_space will fill in the right file 1233 * mark count. 1234 * Back up over filemark 1235 */ 1236 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1237 bp->b_flags |= B_ERROR; 1238 bp->b_error = EIO; 1239 biodone(bp); 1240 continue; 1241 } 1242 } else { 1243 bp->b_resid = bp->b_bcount; 1244 bp->b_error = 0; 1245 bp->b_flags &= ~B_ERROR; 1246 st->flags &= ~ST_AT_FILEMARK; 1247 biodone(bp); 1248 continue; /* seek more work */ 1249 } 1250 } 1251 } 1252 /* 1253 * If we are at EOM but have not reported it 1254 * yet then we should report it now. 1255 */ 1256 if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { 1257 bp->b_resid = bp->b_bcount; 1258 if (st->flags & ST_EIO_PENDING) { 1259 bp->b_error = EIO; 1260 bp->b_flags |= B_ERROR; 1261 } 1262 st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); 1263 biodone(bp); 1264 continue; /* seek more work */ 1265 } 1266 1267 /* 1268 * Fill out the scsi command 1269 */ 1270 bzero(&cmd, sizeof(cmd)); 1271 if ((bp->b_flags & B_READ) == B_WRITE) { 1272 cmd.opcode = WRITE; 1273 st->flags &= ~ST_FM_WRITTEN; 1274 flags = XS_CTL_DATA_OUT; 1275 } else { 1276 cmd.opcode = READ; 1277 flags = XS_CTL_DATA_IN; 1278 } 1279 1280 /* 1281 * Handle "fixed-block-mode" tape drives by using the 1282 * block count instead of the length. 1283 */ 1284 if (st->flags & ST_FIXEDBLOCKS) { 1285 cmd.byte2 |= SRW_FIXED; 1286 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1287 } else 1288 _lto3b(bp->b_bcount, cmd.len); 1289 1290 /* 1291 * go ask the adapter to do all this for us 1292 * XXX Really need NOSLEEP? 1293 */ 1294 error = scsipi_command(sc_link, 1295 (struct scsipi_generic *)&cmd, sizeof(cmd), 1296 (u_char *)bp->b_data, bp->b_bcount, 1297 0, ST_IO_TIME, bp, flags | XS_CTL_NOSLEEP | XS_CTL_ASYNC); 1298 if (error) { 1299 printf("%s: not queued, error %d\n", 1300 st->sc_dev.dv_xname, error); 1301 } 1302 } /* go back and see if we can cram more work in.. */ 1303 } 1304 1305 void 1306 stdone(xs) 1307 struct scsipi_xfer *xs; 1308 { 1309 1310 if (xs->bp != NULL) { 1311 struct st_softc *st = xs->sc_link->device_softc; 1312 if ((xs->bp->b_flags & B_READ) == B_WRITE) { 1313 st->flags |= ST_WRITTEN; 1314 } else { 1315 st->flags &= ~ST_WRITTEN; 1316 } 1317 #if NRND > 0 1318 rnd_add_uint32(&st->rnd_source, xs->bp->b_blkno); 1319 #endif 1320 } 1321 } 1322 1323 int 1324 stread(dev, uio, iomode) 1325 dev_t dev; 1326 struct uio *uio; 1327 int iomode; 1328 { 1329 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1330 1331 return (physio(ststrategy, NULL, dev, B_READ, 1332 st->sc_link->adapter->scsipi_minphys, uio)); 1333 } 1334 1335 int 1336 stwrite(dev, uio, iomode) 1337 dev_t dev; 1338 struct uio *uio; 1339 int iomode; 1340 { 1341 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1342 1343 return (physio(ststrategy, NULL, dev, B_WRITE, 1344 st->sc_link->adapter->scsipi_minphys, uio)); 1345 } 1346 1347 /* 1348 * Perform special action on behalf of the user; 1349 * knows about the internals of this device 1350 */ 1351 int 1352 stioctl(dev, cmd, arg, flag, p) 1353 dev_t dev; 1354 u_long cmd; 1355 caddr_t arg; 1356 int flag; 1357 struct proc *p; 1358 { 1359 int error = 0; 1360 int unit; 1361 int number, nmarks, dsty; 1362 int flags; 1363 struct st_softc *st; 1364 int hold_blksize; 1365 u_int8_t hold_density; 1366 struct mtop *mt = (struct mtop *) arg; 1367 1368 /* 1369 * Find the device that the user is talking about 1370 */ 1371 flags = 0; /* give error messages, act on errors etc. */ 1372 unit = STUNIT(dev); 1373 dsty = STDSTY(dev); 1374 st = st_cd.cd_devs[unit]; 1375 hold_blksize = st->blksize; 1376 hold_density = st->density; 1377 1378 switch ((u_int) cmd) { 1379 1380 case MTIOCGET: { 1381 struct mtget *g = (struct mtget *) arg; 1382 /* 1383 * (to get the current state of READONLY) 1384 */ 1385 error = st_mode_sense(st, XS_CTL_SILENT); 1386 if (error) 1387 break; 1388 SC_DEBUG(st->sc_link, SDEV_DB1, ("[ioctl: get status]\n")); 1389 bzero(g, sizeof(struct mtget)); 1390 g->mt_type = 0x7; /* Ultrix compat *//*? */ 1391 g->mt_blksiz = st->blksize; 1392 g->mt_density = st->density; 1393 g->mt_mblksiz[0] = st->modes[0].blksize; 1394 g->mt_mblksiz[1] = st->modes[1].blksize; 1395 g->mt_mblksiz[2] = st->modes[2].blksize; 1396 g->mt_mblksiz[3] = st->modes[3].blksize; 1397 g->mt_mdensity[0] = st->modes[0].density; 1398 g->mt_mdensity[1] = st->modes[1].density; 1399 g->mt_mdensity[2] = st->modes[2].density; 1400 g->mt_mdensity[3] = st->modes[3].density; 1401 if (st->flags & ST_READONLY) 1402 g->mt_dsreg |= MT_DS_RDONLY; 1403 if (st->flags & ST_MOUNTED) 1404 g->mt_dsreg |= MT_DS_MOUNTED; 1405 g->mt_resid = st->mt_resid; 1406 g->mt_erreg = st->mt_erreg; 1407 /* 1408 * clear latched errors. 1409 */ 1410 st->mt_resid = 0; 1411 st->mt_erreg = 0; 1412 st->asc = 0; 1413 st->ascq = 0; 1414 break; 1415 } 1416 case MTIOCTOP: { 1417 1418 SC_DEBUG(st->sc_link, SDEV_DB1, 1419 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1420 mt->mt_count)); 1421 1422 /* compat: in U*x it is a short */ 1423 number = mt->mt_count; 1424 switch ((short) (mt->mt_op)) { 1425 case MTWEOF: /* write an end-of-file record */ 1426 error = st_write_filemarks(st, number, flags); 1427 break; 1428 case MTBSF: /* backward space file */ 1429 number = -number; 1430 case MTFSF: /* forward space file */ 1431 error = st_check_eod(st, FALSE, &nmarks, flags); 1432 if (!error) 1433 error = st_space(st, number - nmarks, 1434 SP_FILEMARKS, flags); 1435 break; 1436 case MTBSR: /* backward space record */ 1437 number = -number; 1438 case MTFSR: /* forward space record */ 1439 error = st_check_eod(st, TRUE, &nmarks, flags); 1440 if (!error) 1441 error = st_space(st, number, SP_BLKS, flags); 1442 break; 1443 case MTREW: /* rewind */ 1444 error = st_rewind(st, 0, flags); 1445 break; 1446 case MTOFFL: /* rewind and put the drive offline */ 1447 st_unmount(st, EJECT); 1448 break; 1449 case MTNOP: /* no operation, sets status only */ 1450 break; 1451 case MTRETEN: /* retension the tape */ 1452 error = st_load(st, LD_RETENSION, flags); 1453 if (!error) 1454 error = st_load(st, LD_LOAD, flags); 1455 break; 1456 case MTEOM: /* forward space to end of media */ 1457 error = st_check_eod(st, FALSE, &nmarks, flags); 1458 if (!error) 1459 error = st_space(st, 1, SP_EOM, flags); 1460 break; 1461 case MTCACHE: /* enable controller cache */ 1462 st->flags &= ~ST_DONTBUFFER; 1463 goto try_new_value; 1464 case MTNOCACHE: /* disable controller cache */ 1465 st->flags |= ST_DONTBUFFER; 1466 goto try_new_value; 1467 case MTERASE: /* erase volume */ 1468 error = st_erase(st, number, flags); 1469 break; 1470 case MTSETBSIZ: /* Set block size for device */ 1471 #ifdef NOTYET 1472 if (!(st->flags & ST_NEW_MOUNT)) { 1473 uprintf("re-mount tape before changing blocksize"); 1474 error = EINVAL; 1475 break; 1476 } 1477 #endif 1478 if (number == 0) 1479 st->flags &= ~ST_FIXEDBLOCKS; 1480 else { 1481 if ((st->blkmin || st->blkmax) && 1482 (number < st->blkmin || 1483 number > st->blkmax)) { 1484 error = EINVAL; 1485 break; 1486 } 1487 st->flags |= ST_FIXEDBLOCKS; 1488 } 1489 st->blksize = number; 1490 st->flags |= ST_BLOCK_SET; /*XXX */ 1491 goto try_new_value; 1492 1493 case MTSETDNSTY: /* Set density for device and mode */ 1494 /* 1495 * Any number >= 0 and <= 0xff is legal. Numbers 1496 * above 0x80 are 'vendor unique'. 1497 */ 1498 if (number < 0 || number > 255) { 1499 error = EINVAL; 1500 break; 1501 } else 1502 st->density = number; 1503 goto try_new_value; 1504 1505 case MTCMPRESS: 1506 error = st_cmprss(st, number); 1507 break; 1508 1509 case MTEWARN: 1510 if (number) 1511 st->flags |= ST_EARLYWARN; 1512 else 1513 st->flags &= ~ST_EARLYWARN; 1514 break; 1515 1516 default: 1517 error = EINVAL; 1518 } 1519 break; 1520 } 1521 case MTIOCIEOT: 1522 case MTIOCEEOT: 1523 break; 1524 1525 case MTIOCRDSPOS: 1526 error = st_rdpos(st, 0, (u_int32_t *) arg); 1527 break; 1528 1529 case MTIOCRDHPOS: 1530 error = st_rdpos(st, 1, (u_int32_t *) arg); 1531 break; 1532 1533 case MTIOCSLOCATE: 1534 error = st_setpos(st, 0, (u_int32_t *) arg); 1535 break; 1536 1537 case MTIOCHLOCATE: 1538 error = st_setpos(st, 1, (u_int32_t *) arg); 1539 break; 1540 1541 1542 default: 1543 error = scsipi_do_ioctl(st->sc_link, dev, cmd, arg, 1544 flag, p); 1545 break; 1546 } 1547 return (error); 1548 /*-----------------------------*/ 1549 try_new_value: 1550 /* 1551 * Check that the mode being asked for is aggreeable to the 1552 * drive. If not, put it back the way it was. 1553 */ 1554 if ((error = st_mode_select(st, 0)) != 0) {/* put it back as it was */ 1555 printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); 1556 st->density = hold_density; 1557 st->blksize = hold_blksize; 1558 if (st->blksize) 1559 st->flags |= ST_FIXEDBLOCKS; 1560 else 1561 st->flags &= ~ST_FIXEDBLOCKS; 1562 return (error); 1563 } 1564 /* 1565 * As the drive liked it, if we are setting a new default, 1566 * set it into the structures as such. 1567 * 1568 * The means for deciding this are not finalised yet- but 1569 * if the device was opened in Control Mode, the values 1570 * are persistent now across mounts. 1571 */ 1572 if (STMODE(dev) == CTRL_MODE) { 1573 switch ((short) (mt->mt_op)) { 1574 case MTSETBSIZ: 1575 st->modes[dsty].blksize = st->blksize; 1576 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1577 break; 1578 case MTSETDNSTY: 1579 st->modes[dsty].density = st->density; 1580 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1581 break; 1582 } 1583 } 1584 return (0); 1585 } 1586 1587 /* 1588 * Do a synchronous read. 1589 */ 1590 int 1591 st_read(st, buf, size, flags) 1592 struct st_softc *st; 1593 int size; 1594 int flags; 1595 char *buf; 1596 { 1597 struct scsi_rw_tape cmd; 1598 1599 /* 1600 * If it's a null transfer, return immediatly 1601 */ 1602 if (size == 0) 1603 return (0); 1604 bzero(&cmd, sizeof(cmd)); 1605 cmd.opcode = READ; 1606 if (st->flags & ST_FIXEDBLOCKS) { 1607 cmd.byte2 |= SRW_FIXED; 1608 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1609 cmd.len); 1610 } else 1611 _lto3b(size, cmd.len); 1612 return (scsipi_command(st->sc_link, 1613 (struct scsipi_generic *)&cmd, sizeof(cmd), 1614 (u_char *)buf, size, 0, ST_IO_TIME, NULL, flags | XS_CTL_DATA_IN)); 1615 } 1616 1617 /* 1618 * Ask the drive what it's min and max blk sizes are. 1619 */ 1620 int 1621 st_read_block_limits(st, flags) 1622 struct st_softc *st; 1623 int flags; 1624 { 1625 struct scsi_block_limits cmd; 1626 struct scsi_block_limits_data block_limits; 1627 struct scsipi_link *sc_link = st->sc_link; 1628 int error; 1629 1630 /* 1631 * do a 'Read Block Limits' 1632 */ 1633 bzero(&cmd, sizeof(cmd)); 1634 cmd.opcode = READ_BLOCK_LIMITS; 1635 1636 /* 1637 * do the command, update the global values 1638 */ 1639 error = scsipi_command(sc_link, (struct scsipi_generic *)&cmd, 1640 sizeof(cmd), (u_char *)&block_limits, sizeof(block_limits), 1641 ST_RETRIES, ST_CTL_TIME, NULL, 1642 flags | XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); 1643 if (error) 1644 return (error); 1645 1646 st->blkmin = _2btol(block_limits.min_length); 1647 st->blkmax = _3btol(block_limits.max_length); 1648 1649 SC_DEBUG(sc_link, SDEV_DB3, 1650 ("(%d <= blksize <= %d)\n", st->blkmin, st->blkmax)); 1651 return (0); 1652 } 1653 1654 /* 1655 * Get the scsi driver to send a full inquiry to the 1656 * device and use the results to fill out the global 1657 * parameter structure. 1658 * 1659 * called from: 1660 * attach 1661 * open 1662 * ioctl (to reset original blksize) 1663 */ 1664 int 1665 st_mode_sense(st, flags) 1666 struct st_softc *st; 1667 int flags; 1668 { 1669 u_int scsipi_sense_len; 1670 int error; 1671 struct scsi_mode_sense cmd; 1672 struct scsipi_sense { 1673 struct scsi_mode_header header; 1674 struct scsi_blk_desc blk_desc; 1675 u_char sense_data[MAX_PAGE_0_SIZE]; 1676 } scsipi_sense; 1677 struct scsipi_link *sc_link = st->sc_link; 1678 1679 scsipi_sense_len = 12 + st->page_0_size; 1680 1681 /* 1682 * Set up a mode sense 1683 */ 1684 bzero(&cmd, sizeof(cmd)); 1685 cmd.opcode = SCSI_MODE_SENSE; 1686 cmd.length = scsipi_sense_len; 1687 1688 /* 1689 * do the command, but we don't need the results 1690 * just print them for our interest's sake, if asked, 1691 * or if we need it as a template for the mode select 1692 * store it away. 1693 */ 1694 error = scsipi_command(sc_link, (struct scsipi_generic *)&cmd, 1695 sizeof(cmd), (u_char *)&scsipi_sense, scsipi_sense_len, 1696 ST_RETRIES, ST_CTL_TIME, NULL, 1697 flags | XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); 1698 if (error) 1699 return (error); 1700 1701 st->numblks = _3btol(scsipi_sense.blk_desc.nblocks); 1702 st->media_blksize = _3btol(scsipi_sense.blk_desc.blklen); 1703 st->media_density = scsipi_sense.blk_desc.density; 1704 if (scsipi_sense.header.dev_spec & SMH_DSP_WRITE_PROT) 1705 st->flags |= ST_READONLY; 1706 else 1707 st->flags &= ~ST_READONLY; 1708 SC_DEBUG(sc_link, SDEV_DB3, 1709 ("density code %d, %d-byte blocks, write-%s, ", 1710 st->media_density, st->media_blksize, 1711 st->flags & ST_READONLY ? "protected" : "enabled")); 1712 SC_DEBUG(sc_link, SDEV_DB3, 1713 ("%sbuffered\n", 1714 scsipi_sense.header.dev_spec & SMH_DSP_BUFF_MODE ? "" : "un")); 1715 if (st->page_0_size) 1716 bcopy(scsipi_sense.sense_data, st->sense_data, 1717 st->page_0_size); 1718 sc_link->flags |= SDEV_MEDIA_LOADED; 1719 return (0); 1720 } 1721 1722 /* 1723 * Send a filled out parameter structure to the drive to 1724 * set it into the desire modes etc. 1725 */ 1726 int 1727 st_mode_select(st, flags) 1728 struct st_softc *st; 1729 int flags; 1730 { 1731 u_int scsi_select_len; 1732 struct scsi_mode_select cmd; 1733 struct scsi_select { 1734 struct scsi_mode_header header; 1735 struct scsi_blk_desc blk_desc; 1736 u_char sense_data[MAX_PAGE_0_SIZE]; 1737 } scsi_select; 1738 struct scsipi_link *sc_link = st->sc_link; 1739 1740 scsi_select_len = 12 + st->page_0_size; 1741 1742 /* 1743 * This quirk deals with drives that have only one valid mode 1744 * and think this gives them license to reject all mode selects, 1745 * even if the selected mode is the one that is supported. 1746 */ 1747 if (st->quirks & ST_Q_UNIMODAL) { 1748 SC_DEBUG(sc_link, SDEV_DB3, 1749 ("not setting density 0x%x blksize 0x%x\n", 1750 st->density, st->blksize)); 1751 return (0); 1752 } 1753 1754 /* 1755 * Set up for a mode select 1756 */ 1757 bzero(&cmd, sizeof(cmd)); 1758 cmd.opcode = SCSI_MODE_SELECT; 1759 cmd.length = scsi_select_len; 1760 1761 bzero(&scsi_select, scsi_select_len); 1762 scsi_select.header.blk_desc_len = sizeof(struct scsi_blk_desc); 1763 scsi_select.header.dev_spec &= ~SMH_DSP_BUFF_MODE; 1764 scsi_select.blk_desc.density = st->density; 1765 if (st->flags & ST_DONTBUFFER) 1766 scsi_select.header.dev_spec |= SMH_DSP_BUFF_MODE_OFF; 1767 else 1768 scsi_select.header.dev_spec |= SMH_DSP_BUFF_MODE_ON; 1769 if (st->flags & ST_FIXEDBLOCKS) 1770 _lto3b(st->blksize, scsi_select.blk_desc.blklen); 1771 if (st->page_0_size) 1772 bcopy(st->sense_data, scsi_select.sense_data, st->page_0_size); 1773 1774 /* 1775 * do the command 1776 */ 1777 return (scsipi_command(sc_link, (struct scsipi_generic *)&cmd, 1778 sizeof(cmd), (u_char *)&scsi_select, scsi_select_len, 1779 ST_RETRIES, ST_CTL_TIME, NULL, 1780 flags | XS_CTL_DATA_OUT | XS_CTL_DATA_ONSTACK)); 1781 } 1782 1783 int 1784 st_cmprss(st, onoff) 1785 struct st_softc *st; 1786 int onoff; 1787 { 1788 u_int scsi_dlen; 1789 struct scsi_mode_select mcmd; 1790 struct scsi_mode_sense scmd; 1791 struct scsi_select { 1792 struct scsi_mode_header header; 1793 struct scsi_blk_desc blk_desc; 1794 u_char pdata[max(sizeof(struct scsi_tape_dev_conf_page), 1795 sizeof(struct scsi_tape_dev_compression_page))]; 1796 } scsi_pdata; 1797 struct scsi_tape_dev_conf_page *ptr; 1798 struct scsi_tape_dev_compression_page *cptr; 1799 struct scsipi_link *sc_link = st->sc_link; 1800 int error, ison, flags; 1801 1802 scsi_dlen = sizeof(scsi_pdata); 1803 bzero(&scsi_pdata, scsi_dlen); 1804 1805 /* 1806 * Set up for a mode sense. 1807 * Do DATA COMPRESSION page first. 1808 */ 1809 bzero(&scmd, sizeof(scmd)); 1810 scmd.opcode = SCSI_MODE_SENSE; 1811 scmd.page = SMS_PAGE_CTRL_CURRENT | 0xf; 1812 scmd.length = scsi_dlen; 1813 1814 flags = XS_CTL_SILENT; 1815 1816 /* 1817 * Do the MODE SENSE command... 1818 */ 1819 again: 1820 bzero(&scsi_pdata, scsi_dlen); 1821 error = scsipi_command(sc_link, 1822 (struct scsipi_generic *)&scmd, sizeof(scmd), 1823 (u_char *)&scsi_pdata, scsi_dlen, 1824 ST_RETRIES, ST_CTL_TIME, NULL, 1825 flags | XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); 1826 1827 if (error) { 1828 if (scmd.byte2 != SMS_DBD) { 1829 scmd.byte2 = SMS_DBD; 1830 goto again; 1831 } 1832 /* 1833 * Try a different page? 1834 */ 1835 if (scmd.page == (SMS_PAGE_CTRL_CURRENT | 0xf)) { 1836 scmd.page = SMS_PAGE_CTRL_CURRENT | 0x10; 1837 scmd.byte2 = 0; 1838 goto again; 1839 } 1840 return (error); 1841 } 1842 1843 if (scsi_pdata.header.blk_desc_len) 1844 ptr = (struct scsi_tape_dev_conf_page *) scsi_pdata.pdata; 1845 else 1846 ptr = (struct scsi_tape_dev_conf_page *) &scsi_pdata.blk_desc; 1847 1848 if ((scmd.page & SMS_PAGE_CODE) == 0xf) { 1849 cptr = (struct scsi_tape_dev_compression_page *) ptr; 1850 ison = (cptr->dce_dcc & DCP_DCE) != 0; 1851 if (onoff) 1852 cptr->dce_dcc |= DCP_DCE; 1853 else 1854 cptr->dce_dcc &= ~DCP_DCE; 1855 cptr->pagecode &= ~0x80; 1856 } else { 1857 ison = (ptr->sel_comp_alg != 0); 1858 if (onoff) 1859 ptr->sel_comp_alg = 1; 1860 else 1861 ptr->sel_comp_alg = 0; 1862 ptr->pagecode &= ~0x80; 1863 ptr->byte2 = 0; 1864 ptr->active_partition = 0; 1865 ptr->wb_full_ratio = 0; 1866 ptr->rb_empty_ratio = 0; 1867 ptr->byte8 &= ~0x30; 1868 ptr->gap_size = 0; 1869 ptr->byte10 &= ~0xe7; 1870 ptr->ew_bufsize[0] = 0; 1871 ptr->ew_bufsize[1] = 0; 1872 ptr->ew_bufsize[2] = 0; 1873 ptr->reserved = 0; 1874 } 1875 onoff = onoff ? 1 : 0; 1876 /* 1877 * There might be a virtue in actually doing the MODE SELECTS, 1878 * but let's not clog the bus over it. 1879 */ 1880 if (onoff == ison) 1881 return (0); 1882 1883 /* 1884 * Set up for a mode select 1885 */ 1886 1887 scsi_pdata.header.data_length = 0; 1888 scsi_pdata.header.medium_type = 0; 1889 if ((st->flags & ST_DONTBUFFER) == 0) 1890 scsi_pdata.header.dev_spec = SMH_DSP_BUFF_MODE_ON; 1891 else 1892 scsi_pdata.header.dev_spec = 0; 1893 1894 bzero(&mcmd, sizeof(mcmd)); 1895 mcmd.opcode = SCSI_MODE_SELECT; 1896 mcmd.byte2 = SMS_PF; 1897 mcmd.length = scsi_dlen; 1898 if (scsi_pdata.header.blk_desc_len) { 1899 scsi_pdata.blk_desc.density = 0; 1900 scsi_pdata.blk_desc.nblocks[0] = 0; 1901 scsi_pdata.blk_desc.nblocks[1] = 0; 1902 scsi_pdata.blk_desc.nblocks[2] = 0; 1903 } 1904 1905 /* 1906 * Do the command 1907 */ 1908 error = scsipi_command(sc_link, 1909 (struct scsipi_generic *)&mcmd, sizeof(mcmd), 1910 (u_char *)&scsi_pdata, scsi_dlen, 1911 ST_RETRIES, ST_CTL_TIME, NULL, 1912 flags | XS_CTL_DATA_OUT | XS_CTL_DATA_ONSTACK); 1913 1914 if (error && (scmd.page & SMS_PAGE_CODE) == 0xf) { 1915 /* 1916 * Try DEVICE CONFIGURATION page. 1917 */ 1918 scmd.page = SMS_PAGE_CTRL_CURRENT | 0x10; 1919 goto again; 1920 } 1921 return (error); 1922 } 1923 /* 1924 * issue an erase command 1925 */ 1926 int 1927 st_erase(st, full, flags) 1928 struct st_softc *st; 1929 int full, flags; 1930 { 1931 int tmo; 1932 struct scsi_erase cmd; 1933 1934 /* 1935 * Full erase means set LONG bit in erase command, which asks 1936 * the drive to erase the entire unit. Without this bit, we're 1937 * asking the drive to write an erase gap. 1938 */ 1939 bzero(&cmd, sizeof(cmd)); 1940 cmd.opcode = ERASE; 1941 if (full) { 1942 cmd.byte2 = SE_IMMED|SE_LONG; 1943 tmo = ST_SPC_TIME; 1944 } else { 1945 tmo = ST_IO_TIME; 1946 cmd.byte2 = SE_IMMED; 1947 } 1948 1949 /* 1950 * XXX We always do this asynchronously, for now. How long should 1951 * we wait if we want to (eventually) to it synchronously? 1952 */ 1953 return (scsipi_command(st->sc_link, 1954 (struct scsipi_generic *)&cmd, sizeof(cmd), 1955 0, 0, ST_RETRIES, tmo, NULL, flags)); 1956 } 1957 1958 /* 1959 * skip N blocks/filemarks/seq filemarks/eom 1960 */ 1961 int 1962 st_space(st, number, what, flags) 1963 struct st_softc *st; 1964 u_int what; 1965 int flags; 1966 int number; 1967 { 1968 struct scsi_space cmd; 1969 int error; 1970 1971 switch (what) { 1972 case SP_BLKS: 1973 if (st->flags & ST_PER_ACTION) { 1974 if (number > 0) { 1975 st->flags &= ~ST_PER_ACTION; 1976 return (EIO); 1977 } else if (number < 0) { 1978 if (st->flags & ST_AT_FILEMARK) { 1979 /* 1980 * Handling of ST_AT_FILEMARK 1981 * in st_space will fill in the 1982 * right file mark count. 1983 */ 1984 error = st_space(st, 0, SP_FILEMARKS, 1985 flags); 1986 if (error) 1987 return (error); 1988 } 1989 if (st->flags & ST_BLANK_READ) { 1990 st->flags &= ~ST_BLANK_READ; 1991 return (EIO); 1992 } 1993 st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); 1994 } 1995 } 1996 break; 1997 case SP_FILEMARKS: 1998 if (st->flags & ST_EIO_PENDING) { 1999 if (number > 0) { 2000 /* pretend we just discovered the error */ 2001 st->flags &= ~ST_EIO_PENDING; 2002 return (EIO); 2003 } else if (number < 0) { 2004 /* back away from the error */ 2005 st->flags &= ~ST_EIO_PENDING; 2006 } 2007 } 2008 if (st->flags & ST_AT_FILEMARK) { 2009 st->flags &= ~ST_AT_FILEMARK; 2010 number--; 2011 } 2012 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 2013 /* back away from unwritten tape */ 2014 st->flags &= ~ST_BLANK_READ; 2015 number++; /* XXX dubious */ 2016 } 2017 break; 2018 case SP_EOM: 2019 if (st->flags & ST_EOM_PENDING) { 2020 /* we're already there */ 2021 st->flags &= ~ST_EOM_PENDING; 2022 return (0); 2023 } 2024 if (st->flags & ST_EIO_PENDING) { 2025 /* pretend we just discovered the error */ 2026 st->flags &= ~ST_EIO_PENDING; 2027 return (EIO); 2028 } 2029 if (st->flags & ST_AT_FILEMARK) 2030 st->flags &= ~ST_AT_FILEMARK; 2031 break; 2032 } 2033 if (number == 0) 2034 return (0); 2035 2036 bzero(&cmd, sizeof(cmd)); 2037 cmd.opcode = SPACE; 2038 cmd.byte2 = what; 2039 _lto3b(number, cmd.number); 2040 2041 return (scsipi_command(st->sc_link, 2042 (struct scsipi_generic *)&cmd, sizeof(cmd), 2043 0, 0, 0, ST_SPC_TIME, NULL, flags)); 2044 } 2045 2046 /* 2047 * write N filemarks 2048 */ 2049 int 2050 st_write_filemarks(st, number, flags) 2051 struct st_softc *st; 2052 int flags; 2053 int number; 2054 { 2055 struct scsi_write_filemarks cmd; 2056 2057 /* 2058 * It's hard to write a negative number of file marks. 2059 * Don't try. 2060 */ 2061 if (number < 0) 2062 return (EINVAL); 2063 switch (number) { 2064 case 0: /* really a command to sync the drive's buffers */ 2065 break; 2066 case 1: 2067 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 2068 st->flags &= ~ST_WRITTEN; 2069 else 2070 st->flags |= ST_FM_WRITTEN; 2071 st->flags &= ~ST_PER_ACTION; 2072 break; 2073 default: 2074 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 2075 } 2076 2077 bzero(&cmd, sizeof(cmd)); 2078 cmd.opcode = WRITE_FILEMARKS; 2079 _lto3b(number, cmd.number); 2080 2081 return (scsipi_command(st->sc_link, 2082 (struct scsipi_generic *)&cmd, sizeof(cmd), 2083 0, 0, 0, ST_IO_TIME * 4, NULL, flags)); 2084 } 2085 2086 /* 2087 * Make sure the right number of file marks is on tape if the 2088 * tape has been written. If the position argument is true, 2089 * leave the tape positioned where it was originally. 2090 * 2091 * nmarks returns the number of marks to skip (or, if position 2092 * true, which were skipped) to get back original position. 2093 */ 2094 int 2095 st_check_eod(st, position, nmarks, flags) 2096 struct st_softc *st; 2097 boolean position; 2098 int *nmarks; 2099 int flags; 2100 { 2101 int error; 2102 2103 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 2104 default: 2105 *nmarks = 0; 2106 return (0); 2107 case ST_WRITTEN: 2108 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 2109 *nmarks = 1; 2110 break; 2111 case ST_WRITTEN | ST_2FM_AT_EOD: 2112 *nmarks = 2; 2113 } 2114 error = st_write_filemarks(st, *nmarks, flags); 2115 if (position && !error) 2116 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 2117 return (error); 2118 } 2119 2120 /* 2121 * load/unload/retension 2122 */ 2123 int 2124 st_load(st, type, flags) 2125 struct st_softc *st; 2126 u_int type; 2127 int flags; 2128 { 2129 int error; 2130 struct scsi_load cmd; 2131 2132 if (type != LD_LOAD) { 2133 int nmarks; 2134 2135 error = st_check_eod(st, FALSE, &nmarks, flags); 2136 if (error) { 2137 printf("%s: failed to write closing filemarks at " 2138 "unload, errno=%d\n", st->sc_dev.dv_xname, error); 2139 return (error); 2140 } 2141 } 2142 if (st->quirks & ST_Q_IGNORE_LOADS) { 2143 if (type == LD_LOAD) { 2144 /* 2145 * If we ignore loads, at least we should try a rewind. 2146 */ 2147 return st_rewind(st, 0, flags); 2148 } 2149 /* otherwise, we should do what's asked of us */ 2150 } 2151 2152 bzero(&cmd, sizeof(cmd)); 2153 cmd.opcode = LOAD; 2154 cmd.how = type; 2155 2156 error = scsipi_command(st->sc_link, 2157 (struct scsipi_generic *)&cmd, sizeof(cmd), 2158 0, 0, ST_RETRIES, ST_SPC_TIME, NULL, flags); 2159 if (error) { 2160 printf("%s: error %d in st_load (op %d)\n", 2161 st->sc_dev.dv_xname, error, type); 2162 } 2163 return (error); 2164 } 2165 2166 /* 2167 * Rewind the device 2168 */ 2169 int 2170 st_rewind(st, immediate, flags) 2171 struct st_softc *st; 2172 u_int immediate; 2173 int flags; 2174 { 2175 struct scsi_rewind cmd; 2176 int error; 2177 int nmarks; 2178 2179 error = st_check_eod(st, FALSE, &nmarks, flags); 2180 if (error) { 2181 printf("%s: failed to write closing filemarks at " 2182 "rewind, errno=%d\n", st->sc_dev.dv_xname, error); 2183 return (error); 2184 } 2185 st->flags &= ~ST_PER_ACTION; 2186 2187 bzero(&cmd, sizeof(cmd)); 2188 cmd.opcode = REWIND; 2189 cmd.byte2 = immediate; 2190 2191 error = scsipi_command(st->sc_link, 2192 (struct scsipi_generic *)&cmd, sizeof(cmd), 0, 0, ST_RETRIES, 2193 immediate ? ST_CTL_TIME: ST_SPC_TIME, NULL, flags); 2194 if (error) { 2195 printf("%s: error %d trying to rewind\n", 2196 st->sc_dev.dv_xname, error); 2197 } 2198 return (error); 2199 } 2200 2201 int 2202 st_rdpos(st, hard, blkptr) 2203 struct st_softc *st; 2204 int hard; 2205 u_int32_t *blkptr; 2206 { 2207 int error; 2208 u_int8_t posdata[20]; 2209 struct scsi_tape_read_position cmd; 2210 2211 /* 2212 * First flush any pending writes... 2213 */ 2214 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 2215 2216 /* 2217 * The latter case is for 'write protected' tapes 2218 * which are too stupid to recognize a zero count 2219 * for writing filemarks as a no-op. 2220 */ 2221 if (error != 0 && error != EACCES && error != EROFS) 2222 return (error); 2223 2224 bzero(&cmd, sizeof(cmd)); 2225 bzero(&posdata, sizeof(posdata)); 2226 cmd.opcode = READ_POSITION; 2227 if (hard) 2228 cmd.byte1 = 1; 2229 2230 error = scsipi_command(st->sc_link, 2231 (struct scsipi_generic *)&cmd, sizeof(cmd), (u_char *)&posdata, 2232 sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, 2233 XS_CTL_SILENT | XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); 2234 2235 if (error == 0) { 2236 #if 0 2237 printf("posdata:"); 2238 for (hard = 0; hard < sizeof(posdata); hard++) 2239 printf("%02x ", posdata[hard] & 0xff); 2240 printf("\n"); 2241 #endif 2242 if (posdata[0] & 0x4) /* Block Position Unknown */ 2243 error = EINVAL; 2244 else 2245 *blkptr = _4btol(&posdata[4]); 2246 } 2247 return (error); 2248 } 2249 2250 int 2251 st_setpos(st, hard, blkptr) 2252 struct st_softc *st; 2253 int hard; 2254 u_int32_t *blkptr; 2255 { 2256 int error; 2257 struct scsi_tape_locate cmd; 2258 2259 /* 2260 * First flush any pending writes. Strictly speaking, 2261 * we're not supposed to have to worry about this, 2262 * but let's be untrusting. 2263 */ 2264 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 2265 2266 /* 2267 * The latter case is for 'write protected' tapes 2268 * which are too stupid to recognize a zero count 2269 * for writing filemarks as a no-op. 2270 */ 2271 if (error != 0 && error != EACCES && error != EROFS) 2272 return (error); 2273 2274 bzero(&cmd, sizeof(cmd)); 2275 cmd.opcode = LOCATE; 2276 if (hard) 2277 cmd.byte2 = 1 << 2; 2278 _lto4b(*blkptr, cmd.blkaddr); 2279 error = scsipi_command(st->sc_link, 2280 (struct scsipi_generic *)&cmd, sizeof(cmd), 2281 NULL, 0, ST_RETRIES, ST_SPC_TIME, NULL, 0); 2282 /* 2283 * XXX: Note file && block number position now unknown (if 2284 * XXX: these things ever start being maintained in this driver) 2285 */ 2286 return (error); 2287 } 2288 2289 2290 /* 2291 * Look at the returned sense and act on the error and determine 2292 * the unix error number to pass back..., 0 (== report no error), 2293 * -1 = retry the operation, -2 continue error processing. 2294 */ 2295 int 2296 st_interpret_sense(xs) 2297 struct scsipi_xfer *xs; 2298 { 2299 struct scsipi_link *sc_link = xs->sc_link; 2300 struct scsipi_sense_data *sense = &xs->sense.scsi_sense; 2301 struct buf *bp = xs->bp; 2302 struct st_softc *st = sc_link->device_softc; 2303 int retval = SCSIRET_CONTINUE; 2304 int doprint = ((xs->xs_control & XS_CTL_SILENT) == 0); 2305 u_int8_t key; 2306 int32_t info; 2307 2308 /* 2309 * If it isn't a extended or extended/deferred error, let 2310 * the generic code handle it. 2311 */ 2312 if ((sense->error_code & SSD_ERRCODE) != 0x70 && 2313 (sense->error_code & SSD_ERRCODE) != 0x71) { /* DEFFERRED */ 2314 return (retval); 2315 } 2316 2317 if (sense->error_code & SSD_ERRCODE_VALID) 2318 info = _4btol(sense->info); 2319 else 2320 info = xs->datalen; /* bad choice if fixed blocks */ 2321 key = sense->flags & SSD_KEY; 2322 st->mt_erreg = key; 2323 st->asc = sense->add_sense_code; 2324 st->ascq = sense->add_sense_code_qual; 2325 st->mt_resid = (short) info; 2326 2327 /* 2328 * If the device is not open yet, let generic handle 2329 */ 2330 if ((sc_link->flags & SDEV_OPEN) == 0) { 2331 return (retval); 2332 } 2333 2334 2335 if (st->flags & ST_FIXEDBLOCKS) { 2336 xs->resid = info * st->blksize; 2337 if (sense->flags & SSD_EOM) { 2338 if ((st->flags & ST_EARLYWARN) == 0) 2339 st->flags |= ST_EIO_PENDING; 2340 st->flags |= ST_EOM_PENDING; 2341 if (bp) 2342 bp->b_resid = xs->resid; 2343 } 2344 if (sense->flags & SSD_FILEMARK) { 2345 st->flags |= ST_AT_FILEMARK; 2346 if (bp) 2347 bp->b_resid = xs->resid; 2348 } 2349 if (sense->flags & SSD_ILI) { 2350 st->flags |= ST_EIO_PENDING; 2351 if (bp) 2352 bp->b_resid = xs->resid; 2353 if (sense->error_code & SSD_ERRCODE_VALID && 2354 (xs->xs_control & XS_CTL_SILENT) == 0) 2355 printf("%s: block wrong size, %d blocks " 2356 "residual\n", st->sc_dev.dv_xname, info); 2357 2358 /* 2359 * This quirk code helps the drive read 2360 * the first tape block, regardless of 2361 * format. That is required for these 2362 * drives to return proper MODE SENSE 2363 * information. 2364 */ 2365 if ((st->quirks & ST_Q_SENSE_HELP) && 2366 !(sc_link->flags & SDEV_MEDIA_LOADED)) 2367 st->blksize -= 512; 2368 } 2369 /* 2370 * If data wanted and no data was tranfered, do it immediatly 2371 */ 2372 if (xs->datalen && xs->resid >= xs->datalen) { 2373 if (st->flags & ST_EIO_PENDING) 2374 return (EIO); 2375 if (st->flags & ST_AT_FILEMARK) { 2376 if (bp) 2377 bp->b_resid = xs->resid; 2378 return (SCSIRET_NOERROR); 2379 } 2380 } 2381 } else { /* must be variable mode */ 2382 if (sense->flags & SSD_EOM) { 2383 /* 2384 * The current semantics of this 2385 * driver requires EOM detection 2386 * to return EIO unless early 2387 * warning detection is enabled 2388 * for variable mode (this is always 2389 * on for fixed block mode). 2390 */ 2391 if (st->flags & ST_EARLYWARN) { 2392 st->flags |= ST_EOM_PENDING; 2393 retval = SCSIRET_NOERROR; 2394 } else { 2395 retval = EIO; 2396 } 2397 2398 /* 2399 * If it's an unadorned EOM detection, 2400 * suppress printing an error. 2401 */ 2402 if (key == SKEY_NO_SENSE) { 2403 doprint = 0; 2404 } 2405 } else if (sense->flags & SSD_FILEMARK) { 2406 retval = SCSIRET_NOERROR; 2407 } else if (sense->flags & SSD_ILI) { 2408 if (info < 0) { 2409 /* 2410 * The tape record was bigger than the read 2411 * we issued. 2412 */ 2413 if ((xs->xs_control & XS_CTL_SILENT) == 0) { 2414 printf("%s: %d-byte tape record too big" 2415 " for %d-byte user buffer\n", 2416 st->sc_dev.dv_xname, 2417 xs->datalen - info, xs->datalen); 2418 } 2419 retval = EIO; 2420 } else { 2421 retval = SCSIRET_NOERROR; 2422 } 2423 } 2424 xs->resid = info; 2425 if (bp) 2426 bp->b_resid = info; 2427 } 2428 2429 #ifndef SCSIDEBUG 2430 if (retval == SCSIRET_NOERROR && key == SKEY_NO_SENSE) { 2431 doprint = 0; 2432 } 2433 #endif 2434 if (key == SKEY_BLANK_CHECK) { 2435 /* 2436 * This quirk code helps the drive read the 2437 * first tape block, regardless of format. That 2438 * is required for these drives to return proper 2439 * MODE SENSE information. 2440 */ 2441 if ((st->quirks & ST_Q_SENSE_HELP) && 2442 !(sc_link->flags & SDEV_MEDIA_LOADED)) { 2443 /* still starting */ 2444 st->blksize -= 512; 2445 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 2446 st->flags |= ST_BLANK_READ; 2447 xs->resid = xs->datalen; 2448 if (bp) { 2449 bp->b_resid = xs->resid; 2450 /* return an EOF */ 2451 } 2452 retval = SCSIRET_NOERROR; 2453 } 2454 } 2455 2456 /* 2457 * If generic sense processing will continue, we should not 2458 * print sense info here. 2459 */ 2460 if (retval == SCSIRET_CONTINUE) 2461 doprint = 0; 2462 2463 if (doprint) { 2464 #ifdef SCSIVERBOSE 2465 scsipi_print_sense(xs, 0); 2466 #else 2467 xs->sc_link->sc_print_addr(xs->sc_link); 2468 printf("Sense Key 0x%02x", key); 2469 if ((sense->error_code & SSD_ERRCODE_VALID) != 0) { 2470 switch (key) { 2471 case SKEY_NOT_READY: 2472 case SKEY_ILLEGAL_REQUEST: 2473 case SKEY_UNIT_ATTENTION: 2474 case SKEY_WRITE_PROTECT: 2475 break; 2476 case SKEY_BLANK_CHECK: 2477 printf(", requested size: %d (decimal)", info); 2478 break; 2479 case SKEY_ABORTED_COMMAND: 2480 if (xs->retries) 2481 printf(", retrying"); 2482 printf(", cmd 0x%x, info 0x%x", 2483 xs->cmd->opcode, info); 2484 break; 2485 default: 2486 printf(", info = %d (decimal)", info); 2487 } 2488 } 2489 if (sense->extra_len != 0) { 2490 int n; 2491 printf(", data ="); 2492 for (n = 0; n < sense->extra_len; n++) 2493 printf(" %02x", sense->cmd_spec_info[n]); 2494 } 2495 printf("\n"); 2496 #endif 2497 } 2498 return (retval); 2499 } 2500 2501 /* 2502 * The quirk here is that the drive returns some value to st_mode_sense 2503 * incorrectly until the tape has actually passed by the head. 2504 * 2505 * The method is to set the drive to large fixed-block state (user-specified 2506 * density and 1024-byte blocks), then read and rewind to get it to sense the 2507 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 2508 * work, as a last resort, try variable- length blocks. The result will be 2509 * the ability to do an accurate st_mode_sense. 2510 * 2511 * We know we can do a rewind because we just did a load, which implies rewind. 2512 * Rewind seems preferable to space backward if we have a virgin tape. 2513 * 2514 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 2515 * error processing, both part of st_interpret_sense. 2516 */ 2517 int 2518 st_touch_tape(st) 2519 struct st_softc *st; 2520 { 2521 char *buf; 2522 int readsize; 2523 int error; 2524 2525 buf = malloc(1024, M_TEMP, M_NOWAIT); 2526 if (buf == NULL) 2527 return (ENOMEM); 2528 2529 if ((error = st_mode_sense(st, 0)) != 0) 2530 goto bad; 2531 st->blksize = 1024; 2532 do { 2533 switch (st->blksize) { 2534 case 512: 2535 case 1024: 2536 readsize = st->blksize; 2537 st->flags |= ST_FIXEDBLOCKS; 2538 break; 2539 default: 2540 readsize = 1; 2541 st->flags &= ~ST_FIXEDBLOCKS; 2542 } 2543 if ((error = st_mode_select(st, 0)) != 0) { 2544 /* 2545 * The device did not agree with the proposed 2546 * block size. If we exhausted our options, 2547 * return failure, else try another. 2548 */ 2549 if (readsize == 1) 2550 goto bad; 2551 st->blksize -= 512; 2552 continue; 2553 } 2554 st_read(st, buf, readsize, XS_CTL_SILENT); /* XXX */ 2555 if ((error = st_rewind(st, 0, 0)) != 0) { 2556 bad: free(buf, M_TEMP); 2557 return (error); 2558 } 2559 } while (readsize != 1 && readsize > st->blksize); 2560 2561 free(buf, M_TEMP); 2562 return (0); 2563 } 2564 2565 int 2566 stdump(dev, blkno, va, size) 2567 dev_t dev; 2568 daddr_t blkno; 2569 caddr_t va; 2570 size_t size; 2571 { 2572 2573 /* Not implemented. */ 2574 return (ENXIO); 2575 } 2576
Indexes created Sun Sep 21 20:09:37 GMT 2025