1 /* $NetBSD: st.c,v 1.120 2000/02/21 05:11:09 mjacob Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Charles M. Hannum. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Originally written by Julian Elischer (julian@tfs.com) 41 * for TRW Financial Systems for use under the MACH(2.5) operating system. 42 * 43 * TRW Financial Systems, in accordance with their agreement with Carnegie 44 * Mellon University, makes this software available to CMU to distribute 45 * or use in any manner that they see fit as long as this message is kept with 46 * the software. For this reason TFS also grants any other persons or 47 * organisations permission to use or modify this software. 48 * 49 * TFS supplies this software to be publicly redistributed 50 * on the understanding that TFS is not responsible for the correct 51 * functioning of this software in any circumstances. 52 * 53 * Ported to run under 386BSD by Julian Elischer (julian@tfs.com) Sept 1992 54 * major changes by Julian Elischer (julian@jules.dialix.oz.au) May 1993 55 * 56 * A lot of rewhacking done by mjacob (mjacob@nas.nasa.gov). 57 */ 58 59 #include "opt_scsi.h" 60 #include "rnd.h" 61 62 #include <sys/types.h> 63 #include <sys/param.h> 64 #include <sys/systm.h> 65 #include <sys/fcntl.h> 66 #include <sys/errno.h> 67 #include <sys/ioctl.h> 68 #include <sys/malloc.h> 69 #include <sys/buf.h> 70 #include <sys/proc.h> 71 #include <sys/user.h> 72 #include <sys/mtio.h> 73 #include <sys/device.h> 74 #include <sys/conf.h> 75 #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 u_int page_0_size; 127 #define MAX_PAGE_0_SIZE 64 128 struct modes modes[4]; 129 }; 130 131 struct st_quirk_inquiry_pattern { 132 struct scsipi_inquiry_pattern pattern; 133 struct quirkdata quirkdata; 134 }; 135 136 struct st_quirk_inquiry_pattern st_quirk_patterns[] = { 137 {{T_SEQUENTIAL, T_REMOV, 138 " ", " ", " "}, {0, 0, { 139 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 140 {ST_Q_FORCE_BLKSIZE, 512, QIC_24}, /* minor 4-7 */ 141 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_1600}, /* minor 8-11 */ 142 {ST_Q_FORCE_BLKSIZE, 0, HALFINCH_6250} /* minor 12-15 */ 143 }}}, 144 {{T_SEQUENTIAL, T_REMOV, 145 "TANDBERG", " TDC 3600 ", ""}, {0, 12, { 146 {0, 0, 0}, /* minor 0-3 */ 147 {ST_Q_FORCE_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 148 {0, 0, QIC_150}, /* minor 8-11 */ 149 {0, 0, QIC_120} /* minor 12-15 */ 150 }}}, 151 {{T_SEQUENTIAL, T_REMOV, 152 "TANDBERG", " TDC 3800 ", ""}, {0, 0, { 153 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 154 {0, 0, QIC_525}, /* minor 4-7 */ 155 {0, 0, QIC_150}, /* minor 8-11 */ 156 {0, 0, QIC_120} /* minor 12-15 */ 157 }}}, 158 /* 159 * lacking a manual for the 4200, it's not clear what the 160 * specific density codes should be- the device is a 2.5GB 161 * capable QIC drive, those density codes aren't readily 162 * availabel. The 'default' will just have to do. 163 */ 164 {{T_SEQUENTIAL, T_REMOV, 165 "TANDBERG", " TDC 4200 ", ""}, {0, 0, { 166 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 167 {0, 0, QIC_525}, /* minor 4-7 */ 168 {0, 0, QIC_150}, /* minor 8-11 */ 169 {0, 0, QIC_120} /* minor 12-15 */ 170 }}}, 171 /* 172 * At least -005 and -007 need this. I'll assume they all do unless I 173 * hear otherwise. - mycroft, 31MAR1994 174 */ 175 {{T_SEQUENTIAL, T_REMOV, 176 "ARCHIVE ", "VIPER 2525 25462", ""}, {0, 0, { 177 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 178 {ST_Q_SENSE_HELP, 0, QIC_525}, /* minor 4-7 */ 179 {0, 0, QIC_150}, /* minor 8-11 */ 180 {0, 0, QIC_120} /* minor 12-15 */ 181 }}}, 182 /* 183 * One user reports that this works for his tape drive. It probably 184 * needs more work. - mycroft, 09APR1994 185 */ 186 {{T_SEQUENTIAL, T_REMOV, 187 "SANKYO ", "CP525 ", ""}, {0, 0, { 188 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 189 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 190 {0, 0, QIC_150}, /* minor 8-11 */ 191 {0, 0, QIC_120} /* minor 12-15 */ 192 }}}, 193 {{T_SEQUENTIAL, T_REMOV, 194 "ANRITSU ", "DMT780 ", ""}, {0, 0, { 195 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 196 {ST_Q_FORCE_BLKSIZE, 512, QIC_525}, /* minor 4-7 */ 197 {0, 0, QIC_150}, /* minor 8-11 */ 198 {0, 0, QIC_120} /* minor 12-15 */ 199 }}}, 200 {{T_SEQUENTIAL, T_REMOV, 201 "ARCHIVE ", "VIPER 150 21247", ""}, {0, 12, { 202 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 203 {0, 0, QIC_150}, /* minor 4-7 */ 204 {0, 0, QIC_120}, /* minor 8-11 */ 205 {0, 0, QIC_24} /* minor 12-15 */ 206 }}}, 207 {{T_SEQUENTIAL, T_REMOV, 208 "ARCHIVE ", "VIPER 150 21531", ""}, {0, 12, { 209 {ST_Q_SENSE_HELP, 0, 0}, /* minor 0-3 */ 210 {0, 0, QIC_150}, /* minor 4-7 */ 211 {0, 0, QIC_120}, /* minor 8-11 */ 212 {0, 0, QIC_24} /* minor 12-15 */ 213 }}}, 214 {{T_SEQUENTIAL, T_REMOV, 215 "WANGTEK ", "5099ES SCSI", ""}, {0, 0, { 216 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 217 {0, 0, QIC_11}, /* minor 4-7 */ 218 {0, 0, QIC_24}, /* minor 8-11 */ 219 {0, 0, QIC_24} /* minor 12-15 */ 220 }}}, 221 {{T_SEQUENTIAL, T_REMOV, 222 "WANGTEK ", "5150ES SCSI", ""}, {0, 0, { 223 {ST_Q_FORCE_BLKSIZE, 512, 0}, /* minor 0-3 */ 224 {0, 0, QIC_24}, /* minor 4-7 */ 225 {0, 0, QIC_120}, /* minor 8-11 */ 226 {0, 0, QIC_150} /* minor 12-15 */ 227 }}}, 228 {{T_SEQUENTIAL, T_REMOV, 229 "WANGTEK ", "5525ES SCSI REV7", ""}, {0, 0, { 230 {0, 0, 0}, /* minor 0-3 */ 231 {ST_Q_BLKSIZE, 0, QIC_525}, /* minor 4-7 */ 232 {0, 0, QIC_150}, /* minor 8-11 */ 233 {0, 0, QIC_120} /* minor 12-15 */ 234 }}}, 235 {{T_SEQUENTIAL, T_REMOV, 236 "WangDAT ", "Model 1300 ", ""}, {0, 0, { 237 {0, 0, 0}, /* minor 0-3 */ 238 {ST_Q_FORCE_BLKSIZE, 512, DDS}, /* minor 4-7 */ 239 {ST_Q_FORCE_BLKSIZE, 1024, DDS}, /* minor 8-11 */ 240 {ST_Q_FORCE_BLKSIZE, 0, DDS} /* minor 12-15 */ 241 }}}, 242 {{T_SEQUENTIAL, T_REMOV, 243 "EXABYTE ", "EXB-8200 ", "263H"}, {0, 5, { 244 {0, 0, 0}, /* minor 0-3 */ 245 {0, 0, 0}, /* minor 4-7 */ 246 {0, 0, 0}, /* minor 8-11 */ 247 {0, 0, 0} /* minor 12-15 */ 248 }}}, 249 {{T_SEQUENTIAL, T_REMOV, 250 "STK", "9490", ""}, 251 {ST_Q_FORCE_BLKSIZE, 0, { 252 {0, 0, 0}, /* minor 0-3 */ 253 {0, 0, 0}, /* minor 4-7 */ 254 {0, 0, 0}, /* minor 8-11 */ 255 {0, 0, 0} /* minor 12-15 */ 256 }}}, 257 {{T_SEQUENTIAL, T_REMOV, 258 "STK", "SD-3", ""}, 259 {ST_Q_FORCE_BLKSIZE, 0, { 260 {0, 0, 0}, /* minor 0-3 */ 261 {0, 0, 0}, /* minor 4-7 */ 262 {0, 0, 0}, /* minor 8-11 */ 263 {0, 0, 0} /* minor 12-15 */ 264 }}}, 265 {{T_SEQUENTIAL, T_REMOV, 266 "IBM", "03590", ""}, {ST_Q_IGNORE_LOADS, 0, { 267 {0, 0, 0}, /* minor 0-3 */ 268 {0, 0, 0}, /* minor 4-7 */ 269 {0, 0, 0}, /* minor 8-11 */ 270 {0, 0, 0} /* minor 12-15 */ 271 }}}, 272 {{T_SEQUENTIAL, T_REMOV, 273 "HP ", "T4000s ", ""}, {ST_Q_UNIMODAL, 0, { 274 {0, 0, QIC_3095}, /* minor 0-3 */ 275 {0, 0, QIC_3095}, /* minor 4-7 */ 276 {0, 0, QIC_3095}, /* minor 8-11 */ 277 {0, 0, QIC_3095}, /* minor 12-15 */ 278 }}}, 279 #if 0 280 {{T_SEQUENTIAL, T_REMOV, 281 "EXABYTE ", "EXB-8200 ", ""}, {0, 12, { 282 {0, 0, 0}, /* minor 0-3 */ 283 {0, 0, 0}, /* minor 4-7 */ 284 {0, 0, 0}, /* minor 8-11 */ 285 {0, 0, 0} /* minor 12-15 */ 286 }}}, 287 #endif 288 {{T_SEQUENTIAL, T_REMOV, 289 "TEAC ", "MT-2ST/N50 ", ""}, {ST_Q_IGNORE_LOADS, 0, { 290 {0, 0, 0}, /* minor 0-3 */ 291 {0, 0, 0}, /* minor 4-7 */ 292 {0, 0, 0}, /* minor 8-11 */ 293 {0, 0, 0} /* minor 12-15 */ 294 }}}, 295 }; 296 297 #define NOEJECT 0 298 #define EJECT 1 299 300 struct st_softc { 301 struct device sc_dev; 302 /*--------------------present operating parameters, flags etc.---------------*/ 303 int flags; /* see below */ 304 u_int quirks; /* quirks for the open mode */ 305 int blksize; /* blksize we are using */ 306 u_int8_t density; /* present density */ 307 u_int page_0_size; /* size of page 0 data */ 308 u_int last_dsty; /* last density opened */ 309 short mt_resid; /* last (short) resid */ 310 short mt_erreg; /* last error (sense key) seen */ 311 #define mt_key mt_erreg 312 u_int8_t asc; /* last asc code seen */ 313 u_int8_t ascq; /* last asc code seen */ 314 /*--------------------device/scsi parameters---------------------------------*/ 315 struct scsipi_link *sc_link; /* our link to the adpter etc. */ 316 /*--------------------parameters reported by the device ---------------------*/ 317 int blkmin; /* min blk size */ 318 int blkmax; /* max blk size */ 319 struct quirkdata *quirkdata; /* if we have a rogue entry */ 320 /*--------------------parameters reported by the device for this media-------*/ 321 u_long numblks; /* nominal blocks capacity */ 322 int media_blksize; /* 0 if not ST_FIXEDBLOCKS */ 323 u_int8_t media_density; /* this is what it said when asked */ 324 /*--------------------quirks for the whole drive-----------------------------*/ 325 u_int drive_quirks; /* quirks of this drive */ 326 /*--------------------How we should set up when opening each minor device----*/ 327 struct modes modes[4]; /* plus more for each mode */ 328 u_int8_t modeflags[4]; /* flags for the modes */ 329 #define DENSITY_SET_BY_USER 0x01 330 #define DENSITY_SET_BY_QUIRK 0x02 331 #define BLKSIZE_SET_BY_USER 0x04 332 #define BLKSIZE_SET_BY_QUIRK 0x08 333 /*--------------------storage for sense data returned by the drive-----------*/ 334 u_char sense_data[MAX_PAGE_0_SIZE]; /* 335 * additional sense data needed 336 * for mode sense/select. 337 */ 338 struct buf_queue buf_queue; /* the queue of pending IO */ 339 /* operations */ 340 #if NRND > 0 341 rndsource_element_t rnd_source; 342 #endif 343 }; 344 345 346 int stmatch __P((struct device *, struct cfdata *, void *)); 347 void stattach __P((struct device *, struct device *, void *)); 348 void st_identify_drive __P((struct st_softc *, 349 struct scsipi_inquiry_pattern *)); 350 void st_loadquirks __P((struct st_softc *)); 351 int st_mount_tape __P((dev_t, int)); 352 void st_unmount __P((struct st_softc *, boolean)); 353 int st_decide_mode __P((struct st_softc *, boolean)); 354 void ststart __P((void *)); 355 void stdone __P((struct scsipi_xfer *)); 356 int st_read __P((struct st_softc *, char *, int, int)); 357 int st_read_block_limits __P((struct st_softc *, int)); 358 int st_mode_sense __P((struct st_softc *, int)); 359 int st_mode_select __P((struct st_softc *, int)); 360 int st_cmprss __P((struct st_softc *, int)); 361 int st_space __P((struct st_softc *, int, u_int, int)); 362 int st_write_filemarks __P((struct st_softc *, int, int)); 363 int st_check_eod __P((struct st_softc *, boolean, int *, int)); 364 int st_load __P((struct st_softc *, u_int, int)); 365 int st_rewind __P((struct st_softc *, u_int, int)); 366 int st_interpret_sense __P((struct scsipi_xfer *)); 367 int st_touch_tape __P((struct st_softc *)); 368 int st_erase __P((struct st_softc *, int full, int flags)); 369 int st_rdpos __P((struct st_softc *, int, u_int32_t *)); 370 int st_setpos __P((struct st_softc *, int, u_int32_t *)); 371 372 struct cfattach st_ca = { 373 sizeof(struct st_softc), stmatch, stattach 374 }; 375 376 extern struct cfdriver st_cd; 377 378 struct scsipi_device st_switch = { 379 st_interpret_sense, 380 ststart, 381 NULL, 382 stdone 383 }; 384 385 #define ST_INFO_VALID 0x0001 386 #define ST_BLOCK_SET 0x0002 /* block size, mode set by ioctl */ 387 #define ST_WRITTEN 0x0004 /* data has been written, EOD needed */ 388 #define ST_FIXEDBLOCKS 0x0008 389 #define ST_AT_FILEMARK 0x0010 390 #define ST_EIO_PENDING 0x0020 /* error reporting deferred until next op */ 391 #define ST_NEW_MOUNT 0x0040 /* still need to decide mode */ 392 #define ST_READONLY 0x0080 /* st_mode_sense says write protected */ 393 #define ST_FM_WRITTEN 0x0100 /* 394 * EOF file mark written -- used with 395 * ~ST_WRITTEN to indicate that multiple file 396 * marks have been written 397 */ 398 #define ST_BLANK_READ 0x0200 /* BLANK CHECK encountered already */ 399 #define ST_2FM_AT_EOD 0x0400 /* write 2 file marks at EOD */ 400 #define ST_MOUNTED 0x0800 /* Device is presently mounted */ 401 #define ST_DONTBUFFER 0x1000 /* Disable buffering/caching */ 402 #define ST_EARLYWARN 0x2000 /* Do (deferred) EOM for variable mode */ 403 #define ST_EOM_PENDING 0x4000 /* EOM reporting deferred until next op */ 404 405 #define ST_PER_ACTION (ST_AT_FILEMARK | ST_EIO_PENDING | ST_EOM_PENDING | \ 406 ST_BLANK_READ) 407 #define ST_PER_MOUNT (ST_INFO_VALID | ST_BLOCK_SET | ST_WRITTEN | \ 408 ST_FIXEDBLOCKS | ST_READONLY | ST_FM_WRITTEN | \ 409 ST_2FM_AT_EOD | ST_PER_ACTION) 410 411 #if defined(ST_ENABLE_EARLYWARN) 412 #define ST_INIT_FLAGS ST_EARLYWARN 413 #else 414 #define ST_INIT_FLAGS 0 415 #endif 416 417 struct scsipi_inquiry_pattern st_patterns[] = { 418 {T_SEQUENTIAL, T_REMOV, 419 "", "", ""}, 420 }; 421 422 int 423 stmatch(parent, match, aux) 424 struct device *parent; 425 struct cfdata *match; 426 void *aux; 427 { 428 struct scsipibus_attach_args *sa = aux; 429 int priority; 430 431 (void)scsipi_inqmatch(&sa->sa_inqbuf, 432 (caddr_t)st_patterns, sizeof(st_patterns)/sizeof(st_patterns[0]), 433 sizeof(st_patterns[0]), &priority); 434 return (priority); 435 } 436 437 /* 438 * The routine called by the low level scsi routine when it discovers 439 * A device suitable for this driver 440 */ 441 void 442 stattach(parent, self, aux) 443 struct device *parent, *self; 444 void *aux; 445 { 446 struct st_softc *st = (void *)self; 447 struct scsipibus_attach_args *sa = aux; 448 struct scsipi_link *sc_link = sa->sa_sc_link; 449 450 SC_DEBUG(sc_link, SDEV_DB2, ("stattach: ")); 451 452 /* 453 * Store information needed to contact our base driver 454 */ 455 st->sc_link = sc_link; 456 sc_link->device = &st_switch; 457 sc_link->device_softc = st; 458 sc_link->openings = 1; 459 460 /* 461 * Set initial flags 462 */ 463 464 st->flags = ST_INIT_FLAGS; 465 466 /* 467 * Check if the drive is a known criminal and take 468 * Any steps needed to bring it into line 469 */ 470 st_identify_drive(st, &sa->sa_inqbuf); 471 /* 472 * Use the subdriver to request information regarding 473 * the drive. We cannot use interrupts yet, so the 474 * request must specify this. 475 */ 476 printf("\n"); 477 printf("%s: %s", st->sc_dev.dv_xname, st->quirkdata ? "rogue, " : ""); 478 if (scsipi_test_unit_ready(sc_link, 479 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE) || 480 st_mode_sense(st, 481 XS_CTL_DISCOVERY | XS_CTL_SILENT | XS_CTL_IGNORE_MEDIA_CHANGE)) 482 printf("drive empty\n"); 483 else { 484 printf("density code 0x%x, ", st->media_density); 485 if (st->media_blksize > 0) 486 printf("%d-byte", st->media_blksize); 487 else 488 printf("variable"); 489 printf(" blocks, write-%s\n", 490 (st->flags & ST_READONLY) ? "protected" : "enabled"); 491 } 492 493 /* 494 * Set up the buf queue for this device 495 */ 496 BUFQ_INIT(&st->buf_queue); 497 498 #if NRND > 0 499 rnd_attach_source(&st->rnd_source, st->sc_dev.dv_xname, 500 RND_TYPE_TAPE, 0); 501 #endif 502 } 503 504 /* 505 * Use the inquiry routine in 'scsi_base' to get drive info so we can 506 * Further tailor our behaviour. 507 */ 508 void 509 st_identify_drive(st, inqbuf) 510 struct st_softc *st; 511 struct scsipi_inquiry_pattern *inqbuf; 512 { 513 struct st_quirk_inquiry_pattern *finger; 514 int priority; 515 516 finger = (struct st_quirk_inquiry_pattern *)scsipi_inqmatch(inqbuf, 517 (caddr_t)st_quirk_patterns, 518 sizeof(st_quirk_patterns) / sizeof(st_quirk_patterns[0]), 519 sizeof(st_quirk_patterns[0]), &priority); 520 if (priority != 0) { 521 st->quirkdata = &finger->quirkdata; 522 st->drive_quirks = finger->quirkdata.quirks; 523 st->quirks = finger->quirkdata.quirks; /* start value */ 524 st->page_0_size = finger->quirkdata.page_0_size; 525 st_loadquirks(st); 526 } 527 } 528 529 /* 530 * initialise the subdevices to the default (QUIRK) state. 531 * this will remove any setting made by the system operator or previous 532 * operations. 533 */ 534 void 535 st_loadquirks(st) 536 struct st_softc *st; 537 { 538 int i; 539 struct modes *mode; 540 struct modes *mode2; 541 542 mode = st->quirkdata->modes; 543 mode2 = st->modes; 544 for (i = 0; i < 4; i++) { 545 bzero(mode2, sizeof(struct modes)); 546 st->modeflags[i] &= ~(BLKSIZE_SET_BY_QUIRK | 547 DENSITY_SET_BY_QUIRK | BLKSIZE_SET_BY_USER | 548 DENSITY_SET_BY_USER); 549 if ((mode->quirks | st->drive_quirks) & ST_Q_FORCE_BLKSIZE) { 550 mode2->blksize = mode->blksize; 551 st->modeflags[i] |= BLKSIZE_SET_BY_QUIRK; 552 } 553 if (mode->density) { 554 mode2->density = mode->density; 555 st->modeflags[i] |= DENSITY_SET_BY_QUIRK; 556 } 557 mode++; 558 mode2++; 559 } 560 } 561 562 /* 563 * open the device. 564 */ 565 int 566 stopen(dev, flags, mode, p) 567 dev_t dev; 568 int flags; 569 int mode; 570 struct proc *p; 571 { 572 u_int stmode, dsty; 573 int error, sflags, unit, tries, ntries; 574 struct st_softc *st; 575 struct scsipi_link *sc_link; 576 577 unit = STUNIT(dev); 578 if (unit >= st_cd.cd_ndevs) 579 return (ENXIO); 580 st = st_cd.cd_devs[unit]; 581 if (st == NULL) 582 return (ENXIO); 583 584 stmode = STMODE(dev); 585 dsty = STDSTY(dev); 586 sc_link = st->sc_link; 587 588 SC_DEBUG(sc_link, SDEV_DB1, ("open: dev=0x%x (unit %d (of %d))\n", dev, 589 unit, st_cd.cd_ndevs)); 590 591 592 /* 593 * Only allow one at a time 594 */ 595 if (sc_link->flags & SDEV_OPEN) { 596 printf("%s: already open\n", st->sc_dev.dv_xname); 597 return (EBUSY); 598 } 599 600 if ((error = scsipi_adapter_addref(sc_link)) != 0) 601 return (error); 602 603 /* 604 * clear any latched errors. 605 */ 606 st->mt_resid = 0; 607 st->mt_erreg = 0; 608 st->asc = 0; 609 st->ascq = 0; 610 611 /* 612 * Catch any unit attention errors. Be silent about this 613 * unless we're already mounted. We ignore media change 614 * if we're in control mode or not mounted yet. 615 */ 616 if ((st->flags & ST_MOUNTED) == 0 || stmode == CTRL_MODE) { 617 #ifdef SCSIDEBUG 618 sflags = XS_CTL_IGNORE_MEDIA_CHANGE; 619 #else 620 sflags = XS_CTL_SILENT|XS_CTL_IGNORE_MEDIA_CHANGE; 621 #endif 622 } else 623 sflags = 0; 624 625 /* 626 * If we're already mounted or we aren't configured for 627 * a mount delay, only try a test unit ready once. Otherwise, 628 * try up to ST_MOUNT_DELAY times with a rest interval of 629 * one second between each try. 630 */ 631 632 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0) { 633 ntries = 1; 634 } else { 635 ntries = ST_MOUNT_DELAY; 636 } 637 638 for (error = tries = 0; tries < ntries; tries++) { 639 int slpintr, oflags; 640 641 /* 642 * If we had no error, or we're opening the control mode 643 * device, we jump out right away. 644 */ 645 646 error = scsipi_test_unit_ready(sc_link, sflags); 647 if (error == 0 || stmode == CTRL_MODE) { 648 break; 649 } 650 651 /* 652 * We had an error. 653 * 654 * If we're already mounted or we aren't configured for 655 * a mount delay, or the error isn't a NOT READY error, 656 * skip to the error exit now. 657 */ 658 if ((st->flags & ST_MOUNTED) || ST_MOUNT_DELAY == 0 || 659 (st->mt_key != SKEY_NOT_READY)) { 660 goto bad; 661 } 662 663 /* 664 * clear any latched errors. 665 */ 666 st->mt_resid = 0; 667 st->mt_erreg = 0; 668 st->asc = 0; 669 st->ascq = 0; 670 671 /* 672 * Fake that we have the device open so 673 * we block other apps from getting in. 674 */ 675 676 oflags = sc_link->flags; 677 sc_link->flags |= SDEV_OPEN; 678 679 slpintr = tsleep(&lbolt, PUSER|PCATCH, "stload", 0); 680 681 sc_link->flags = oflags; /* restore flags */ 682 683 if (slpintr) { 684 goto bad; 685 } 686 } 687 688 689 /* 690 * If the mode is 3 (e.g. minor = 3,7,11,15) then the device has 691 * been opened to set defaults and perform other, usually non-I/O 692 * related, operations. In this case, do a quick check to see 693 * whether the unit actually had a tape loaded (this will be known 694 * as to whether or not we got a NOT READY for the above 695 * unit attention). If a tape is there, go do a mount sequence. 696 */ 697 if (stmode == CTRL_MODE && st->mt_key == SKEY_NOT_READY) { 698 sc_link->flags |= SDEV_OPEN; 699 return (0); 700 } 701 702 /* 703 * If we get this far and had an error set, that means we failed 704 * to pass the 'test unit ready' test for the non-controlmode device, 705 * so we bounce the open. 706 */ 707 708 if (error) 709 return (error); 710 711 /* 712 * Else, we're now committed to saying we're open. 713 */ 714 715 sc_link->flags |= SDEV_OPEN; /* unit attn are now errors */ 716 717 /* 718 * If it's a different mode, or if the media has been 719 * invalidated, unmount the tape from the previous 720 * session but continue with open processing 721 */ 722 if (st->last_dsty != dsty || !(sc_link->flags & SDEV_MEDIA_LOADED)) 723 st_unmount(st, NOEJECT); 724 725 /* 726 * If we are not mounted, then we should start a new 727 * mount session. 728 */ 729 if (!(st->flags & ST_MOUNTED)) { 730 st_mount_tape(dev, flags); 731 st->last_dsty = dsty; 732 } 733 734 SC_DEBUG(sc_link, SDEV_DB2, ("open complete\n")); 735 return (0); 736 737 bad: 738 st_unmount(st, NOEJECT); 739 scsipi_adapter_delref(sc_link); 740 sc_link->flags &= ~SDEV_OPEN; 741 return (error); 742 } 743 744 /* 745 * close the device.. only called if we are the LAST 746 * occurence of an open device 747 */ 748 int 749 stclose(dev, flags, mode, p) 750 dev_t dev; 751 int flags; 752 int mode; 753 struct proc *p; 754 { 755 int stxx, error = 0; 756 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 757 758 SC_DEBUG(st->sc_link, SDEV_DB1, ("closing\n")); 759 760 /* 761 * Make sure that a tape opened in write-only mode will have 762 * file marks written on it when closed, even if not written to. 763 * 764 * This is for SUN compatibility. Actually, the Sun way of 765 * things is to: 766 * 767 * only write filemarks if there are fmks to be written and 768 * - open for write (possibly read/write) 769 * - the last operation was a write 770 * or: 771 * - opened for wronly 772 * - no data was written (including filemarks) 773 */ 774 775 stxx = st->flags & (ST_WRITTEN | ST_FM_WRITTEN); 776 if (((flags & FWRITE) && stxx == ST_WRITTEN) || 777 ((flags & O_ACCMODE) == FWRITE && stxx == 0)) { 778 int nm; 779 error = st_check_eod(st, FALSE, &nm, 0); 780 } 781 782 switch (STMODE(dev)) { 783 case NORMAL_MODE: 784 st_unmount(st, NOEJECT); 785 break; 786 case NOREW_MODE: 787 case CTRL_MODE: 788 /* 789 * Leave mounted unless media seems to have been removed. 790 * 791 * Otherwise, if we're to terminate a tape with more than one 792 * filemark [ and because we're not rewinding here ], backspace 793 * one filemark so that later appends will see an unbroken 794 * sequence of: 795 * 796 * file - FMK - file - FMK ... file - FMK FMK (EOM) 797 */ 798 if (!(st->sc_link->flags & SDEV_MEDIA_LOADED)) { 799 st_unmount(st, NOEJECT); 800 } else if (error == 0) { 801 /* 802 * ST_WRITTEN was preserved from above. 803 * 804 * All we need to know here is: 805 * 806 * Were we writing this tape and was the last 807 * operation a write? 808 * 809 * Are there supposed to be 2FM at EOD? 810 * 811 * If both statements are true, then we backspace 812 * one filemark. 813 */ 814 stxx |= (st->flags & ST_2FM_AT_EOD); 815 if ((flags & FWRITE) != 0 && 816 (stxx == (ST_2FM_AT_EOD|ST_WRITTEN))) { 817 error = st_space(st, -1, SP_FILEMARKS, 0); 818 } 819 } 820 break; 821 case EJECT_MODE: 822 st_unmount(st, EJECT); 823 break; 824 } 825 826 scsipi_wait_drain(st->sc_link); 827 828 scsipi_adapter_delref(st->sc_link); 829 st->sc_link->flags &= ~SDEV_OPEN; 830 831 return (error); 832 } 833 834 /* 835 * Start a new mount session. 836 * Copy in all the default parameters from the selected device mode. 837 * and try guess any that seem to be defaulted. 838 */ 839 int 840 st_mount_tape(dev, flags) 841 dev_t dev; 842 int flags; 843 { 844 int unit; 845 u_int dsty; 846 struct st_softc *st; 847 struct scsipi_link *sc_link; 848 int error = 0; 849 850 unit = STUNIT(dev); 851 dsty = STDSTY(dev); 852 st = st_cd.cd_devs[unit]; 853 sc_link = st->sc_link; 854 855 if (st->flags & ST_MOUNTED) 856 return (0); 857 858 SC_DEBUG(sc_link, SDEV_DB1, ("mounting\n ")); 859 st->flags |= ST_NEW_MOUNT; 860 st->quirks = st->drive_quirks | st->modes[dsty].quirks; 861 /* 862 * If the media is new, then make sure we give it a chance to 863 * to do a 'load' instruction. (We assume it is new.) 864 */ 865 if ((error = st_load(st, LD_LOAD, XS_CTL_SILENT)) != 0) 866 return (error); 867 /* 868 * Throw another dummy instruction to catch 869 * 'Unit attention' errors. Many drives give 870 * these after doing a Load instruction (with 871 * the MEDIUM MAY HAVE CHANGED asc/ascq). 872 */ 873 scsipi_test_unit_ready(sc_link, XS_CTL_SILENT); /* XXX */ 874 875 /* 876 * Some devices can't tell you much until they have been 877 * asked to look at the media. This quirk does this. 878 */ 879 if (st->quirks & ST_Q_SENSE_HELP) 880 if ((error = st_touch_tape(st)) != 0) 881 return (error); 882 /* 883 * Load the physical device parameters 884 * loads: blkmin, blkmax 885 */ 886 if ((error = st_read_block_limits(st, 0)) != 0) 887 return (error); 888 /* 889 * Load the media dependent parameters 890 * includes: media_blksize,media_density,numblks 891 * As we have a tape in, it should be reflected here. 892 * If not you may need the "quirk" above. 893 */ 894 if ((error = st_mode_sense(st, 0)) != 0) 895 return (error); 896 /* 897 * If we have gained a permanent density from somewhere, 898 * then use it in preference to the one supplied by 899 * default by the driver. 900 */ 901 if (st->modeflags[dsty] & (DENSITY_SET_BY_QUIRK | DENSITY_SET_BY_USER)) 902 st->density = st->modes[dsty].density; 903 else 904 st->density = st->media_density; 905 /* 906 * If we have gained a permanent blocksize 907 * then use it in preference to the one supplied by 908 * default by the driver. 909 */ 910 st->flags &= ~ST_FIXEDBLOCKS; 911 if (st->modeflags[dsty] & 912 (BLKSIZE_SET_BY_QUIRK | BLKSIZE_SET_BY_USER)) { 913 st->blksize = st->modes[dsty].blksize; 914 if (st->blksize) 915 st->flags |= ST_FIXEDBLOCKS; 916 } else { 917 if ((error = st_decide_mode(st, FALSE)) != 0) 918 return (error); 919 } 920 if ((error = st_mode_select(st, 0)) != 0) { 921 printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); 922 return (error); 923 } 924 scsipi_prevent(sc_link, PR_PREVENT, 925 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 926 st->flags &= ~ST_NEW_MOUNT; 927 st->flags |= ST_MOUNTED; 928 sc_link->flags |= SDEV_MEDIA_LOADED; /* move earlier? */ 929 930 return (0); 931 } 932 933 /* 934 * End the present mount session. 935 * Rewind, and optionally eject the tape. 936 * Reset various flags to indicate that all new 937 * operations require another mount operation 938 */ 939 void 940 st_unmount(st, eject) 941 struct st_softc *st; 942 boolean eject; 943 { 944 struct scsipi_link *sc_link = st->sc_link; 945 int nmarks; 946 947 if (!(st->flags & ST_MOUNTED)) 948 return; 949 SC_DEBUG(sc_link, SDEV_DB1, ("unmounting\n")); 950 st_check_eod(st, FALSE, &nmarks, XS_CTL_IGNORE_NOT_READY); 951 st_rewind(st, 0, XS_CTL_IGNORE_NOT_READY); 952 scsipi_prevent(sc_link, PR_ALLOW, 953 XS_CTL_IGNORE_ILLEGAL_REQUEST | XS_CTL_IGNORE_NOT_READY); 954 if (eject) 955 st_load(st, LD_UNLOAD, XS_CTL_IGNORE_NOT_READY); 956 st->flags &= ~(ST_MOUNTED | ST_NEW_MOUNT); 957 sc_link->flags &= ~SDEV_MEDIA_LOADED; 958 } 959 960 /* 961 * Given all we know about the device, media, mode, 'quirks' and 962 * initial operation, make a decision as to how we should be set 963 * to run (regarding blocking and EOD marks) 964 */ 965 int 966 st_decide_mode(st, first_read) 967 struct st_softc *st; 968 boolean first_read; 969 { 970 #ifdef SCSIDEBUG 971 struct scsipi_link *sc_link = st->sc_link; 972 #endif 973 974 SC_DEBUG(sc_link, SDEV_DB2, ("starting block mode decision\n")); 975 976 /* 977 * If the drive can only handle fixed-length blocks and only at 978 * one size, perhaps we should just do that. 979 */ 980 if (st->blkmin && (st->blkmin == st->blkmax)) { 981 st->flags |= ST_FIXEDBLOCKS; 982 st->blksize = st->blkmin; 983 SC_DEBUG(sc_link, SDEV_DB3, 984 ("blkmin == blkmax of %d\n", st->blkmin)); 985 goto done; 986 } 987 /* 988 * If the tape density mandates (or even suggests) use of fixed 989 * or variable-length blocks, comply. 990 */ 991 switch (st->density) { 992 case HALFINCH_800: 993 case HALFINCH_1600: 994 case HALFINCH_6250: 995 case DDS: 996 st->flags &= ~ST_FIXEDBLOCKS; 997 st->blksize = 0; 998 SC_DEBUG(sc_link, SDEV_DB3, ("density specified variable\n")); 999 goto done; 1000 case QIC_11: 1001 case QIC_24: 1002 case QIC_120: 1003 case QIC_150: 1004 case QIC_525: 1005 case QIC_1320: 1006 case QIC_3095: 1007 case QIC_3220: 1008 st->flags |= ST_FIXEDBLOCKS; 1009 if (st->media_blksize > 0) 1010 st->blksize = st->media_blksize; 1011 else 1012 st->blksize = DEF_FIXED_BSIZE; 1013 SC_DEBUG(sc_link, SDEV_DB3, ("density specified fixed\n")); 1014 goto done; 1015 } 1016 /* 1017 * If we're about to read the tape, perhaps we should choose 1018 * fixed or variable-length blocks and block size according to 1019 * what the drive found on the tape. 1020 */ 1021 if (first_read && 1022 (!(st->quirks & ST_Q_BLKSIZE) || (st->media_blksize == 0) || 1023 (st->media_blksize == DEF_FIXED_BSIZE) || 1024 (st->media_blksize == 1024))) { 1025 if (st->media_blksize > 0) 1026 st->flags |= ST_FIXEDBLOCKS; 1027 else 1028 st->flags &= ~ST_FIXEDBLOCKS; 1029 st->blksize = st->media_blksize; 1030 SC_DEBUG(sc_link, SDEV_DB3, 1031 ("Used media_blksize of %d\n", st->media_blksize)); 1032 goto done; 1033 } 1034 /* 1035 * We're getting no hints from any direction. Choose variable- 1036 * length blocks arbitrarily. 1037 */ 1038 st->flags &= ~ST_FIXEDBLOCKS; 1039 st->blksize = 0; 1040 SC_DEBUG(sc_link, SDEV_DB3, 1041 ("Give up and default to variable mode\n")); 1042 1043 done: 1044 /* 1045 * Decide whether or not to write two file marks to signify end- 1046 * of-data. Make the decision as a function of density. If 1047 * the decision is not to use a second file mark, the SCSI BLANK 1048 * CHECK condition code will be recognized as end-of-data when 1049 * first read. 1050 * (I think this should be a by-product of fixed/variable..julian) 1051 */ 1052 switch (st->density) { 1053 /* case 8 mm: What is the SCSI density code for 8 mm, anyway? */ 1054 case QIC_11: 1055 case QIC_24: 1056 case QIC_120: 1057 case QIC_150: 1058 case QIC_525: 1059 case QIC_1320: 1060 case QIC_3095: 1061 case QIC_3220: 1062 st->flags &= ~ST_2FM_AT_EOD; 1063 break; 1064 default: 1065 st->flags |= ST_2FM_AT_EOD; 1066 } 1067 return (0); 1068 } 1069 1070 /* 1071 * Actually translate the requested transfer into 1072 * one the physical driver can understand 1073 * The transfer is described by a buf and will include 1074 * only one physical transfer. 1075 */ 1076 void 1077 ststrategy(bp) 1078 struct buf *bp; 1079 { 1080 struct st_softc *st = st_cd.cd_devs[STUNIT(bp->b_dev)]; 1081 int s; 1082 1083 SC_DEBUG(st->sc_link, SDEV_DB1, 1084 ("ststrategy %ld bytes @ blk %d\n", bp->b_bcount, bp->b_blkno)); 1085 /* 1086 * If it's a null transfer, return immediatly 1087 */ 1088 if (bp->b_bcount == 0) 1089 goto done; 1090 1091 /* If offset is negative, error */ 1092 if (bp->b_blkno < 0) { 1093 bp->b_error = EINVAL; 1094 goto bad; 1095 } 1096 1097 /* 1098 * Odd sized request on fixed drives are verboten 1099 */ 1100 if (st->flags & ST_FIXEDBLOCKS) { 1101 if (bp->b_bcount % st->blksize) { 1102 printf("%s: bad request, must be multiple of %d\n", 1103 st->sc_dev.dv_xname, st->blksize); 1104 bp->b_error = EIO; 1105 goto bad; 1106 } 1107 } 1108 /* 1109 * as are out-of-range requests on variable drives. 1110 */ 1111 else if (bp->b_bcount < st->blkmin || 1112 (st->blkmax && bp->b_bcount > st->blkmax)) { 1113 printf("%s: bad request, must be between %d and %d\n", 1114 st->sc_dev.dv_xname, st->blkmin, st->blkmax); 1115 bp->b_error = EIO; 1116 goto bad; 1117 } 1118 s = splbio(); 1119 1120 /* 1121 * Place it in the queue of activities for this tape 1122 * at the end (a bit silly because we only have on user.. 1123 * (but it could fork())) 1124 */ 1125 BUFQ_INSERT_TAIL(&st->buf_queue, bp); 1126 1127 /* 1128 * Tell the device to get going on the transfer if it's 1129 * not doing anything, otherwise just wait for completion 1130 * (All a bit silly if we're only allowing 1 open but..) 1131 */ 1132 ststart(st); 1133 1134 splx(s); 1135 return; 1136 bad: 1137 bp->b_flags |= B_ERROR; 1138 done: 1139 /* 1140 * Correctly set the buf to indicate a completed xfer 1141 */ 1142 bp->b_resid = bp->b_bcount; 1143 biodone(bp); 1144 return; 1145 } 1146 1147 /* 1148 * ststart looks to see if there is a buf waiting for the device 1149 * and that the device is not already busy. If both are true, 1150 * It dequeues the buf and creates a scsi command to perform the 1151 * transfer required. The transfer request will call scsipi_done 1152 * on completion, which will in turn call this routine again 1153 * so that the next queued transfer is performed. 1154 * The bufs are queued by the strategy routine (ststrategy) 1155 * 1156 * This routine is also called after other non-queued requests 1157 * have been made of the scsi driver, to ensure that the queue 1158 * continues to be drained. 1159 * ststart() is called at splbio 1160 */ 1161 void 1162 ststart(v) 1163 void *v; 1164 { 1165 struct st_softc *st = v; 1166 struct scsipi_link *sc_link = st->sc_link; 1167 register struct buf *bp; 1168 struct scsi_rw_tape cmd; 1169 int flags, error; 1170 1171 SC_DEBUG(sc_link, SDEV_DB2, ("ststart ")); 1172 /* 1173 * See if there is a buf to do and we are not already 1174 * doing one 1175 */ 1176 while (sc_link->active < sc_link->openings) { 1177 /* if a special awaits, let it proceed first */ 1178 if (sc_link->flags & SDEV_WAITING) { 1179 sc_link->flags &= ~SDEV_WAITING; 1180 wakeup((caddr_t)sc_link); 1181 return; 1182 } 1183 1184 if ((bp = BUFQ_FIRST(&st->buf_queue)) == NULL) 1185 return; 1186 BUFQ_REMOVE(&st->buf_queue, bp); 1187 1188 /* 1189 * If the device has been unmounted by the user 1190 * then throw away all requests until done. 1191 */ 1192 if (!(st->flags & ST_MOUNTED) || 1193 !(sc_link->flags & SDEV_MEDIA_LOADED)) { 1194 /* make sure that one implies the other.. */ 1195 sc_link->flags &= ~SDEV_MEDIA_LOADED; 1196 bp->b_flags |= B_ERROR; 1197 bp->b_error = EIO; 1198 bp->b_resid = bp->b_bcount; 1199 biodone(bp); 1200 continue; 1201 } 1202 /* 1203 * only FIXEDBLOCK devices have pending I/O or space operations. 1204 */ 1205 if (st->flags & ST_FIXEDBLOCKS) { 1206 /* 1207 * If we are at a filemark but have not reported it yet 1208 * then we should report it now 1209 */ 1210 if (st->flags & ST_AT_FILEMARK) { 1211 if ((bp->b_flags & B_READ) == B_WRITE) { 1212 /* 1213 * Handling of ST_AT_FILEMARK in 1214 * st_space will fill in the right file 1215 * mark count. 1216 * Back up over filemark 1217 */ 1218 if (st_space(st, 0, SP_FILEMARKS, 0)) { 1219 bp->b_flags |= B_ERROR; 1220 bp->b_error = EIO; 1221 biodone(bp); 1222 continue; 1223 } 1224 } else { 1225 bp->b_resid = bp->b_bcount; 1226 bp->b_error = 0; 1227 bp->b_flags &= ~B_ERROR; 1228 st->flags &= ~ST_AT_FILEMARK; 1229 biodone(bp); 1230 continue; /* seek more work */ 1231 } 1232 } 1233 } 1234 /* 1235 * If we are at EOM but have not reported it 1236 * yet then we should report it now. 1237 */ 1238 if (st->flags & (ST_EOM_PENDING|ST_EIO_PENDING)) { 1239 bp->b_resid = bp->b_bcount; 1240 if (st->flags & ST_EIO_PENDING) { 1241 bp->b_error = EIO; 1242 bp->b_flags |= B_ERROR; 1243 } 1244 st->flags &= ~(ST_EOM_PENDING|ST_EIO_PENDING); 1245 biodone(bp); 1246 continue; /* seek more work */ 1247 } 1248 1249 /* 1250 * Fill out the scsi command 1251 */ 1252 bzero(&cmd, sizeof(cmd)); 1253 if ((bp->b_flags & B_READ) == B_WRITE) { 1254 cmd.opcode = WRITE; 1255 st->flags &= ~ST_FM_WRITTEN; 1256 flags = XS_CTL_DATA_OUT; 1257 } else { 1258 cmd.opcode = READ; 1259 flags = XS_CTL_DATA_IN; 1260 } 1261 1262 /* 1263 * Handle "fixed-block-mode" tape drives by using the 1264 * block count instead of the length. 1265 */ 1266 if (st->flags & ST_FIXEDBLOCKS) { 1267 cmd.byte2 |= SRW_FIXED; 1268 _lto3b(bp->b_bcount / st->blksize, cmd.len); 1269 } else 1270 _lto3b(bp->b_bcount, cmd.len); 1271 1272 /* 1273 * go ask the adapter to do all this for us 1274 * XXX Really need NOSLEEP? 1275 */ 1276 error = scsipi_command(sc_link, 1277 (struct scsipi_generic *)&cmd, sizeof(cmd), 1278 (u_char *)bp->b_data, bp->b_bcount, 1279 0, ST_IO_TIME, bp, flags | XS_CTL_NOSLEEP | XS_CTL_ASYNC); 1280 if (error) { 1281 printf("%s: not queued, error %d\n", 1282 st->sc_dev.dv_xname, error); 1283 } 1284 } /* go back and see if we can cram more work in.. */ 1285 } 1286 1287 void 1288 stdone(xs) 1289 struct scsipi_xfer *xs; 1290 { 1291 1292 if (xs->bp != NULL) { 1293 struct st_softc *st = xs->sc_link->device_softc; 1294 if ((xs->bp->b_flags & B_READ) == B_WRITE) { 1295 st->flags |= ST_WRITTEN; 1296 } else { 1297 st->flags &= ~ST_WRITTEN; 1298 } 1299 #if NRND > 0 1300 rnd_add_uint32(&st->rnd_source, xs->bp->b_blkno); 1301 #endif 1302 } 1303 } 1304 1305 int 1306 stread(dev, uio, iomode) 1307 dev_t dev; 1308 struct uio *uio; 1309 int iomode; 1310 { 1311 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1312 1313 return (physio(ststrategy, NULL, dev, B_READ, 1314 st->sc_link->adapter->scsipi_minphys, uio)); 1315 } 1316 1317 int 1318 stwrite(dev, uio, iomode) 1319 dev_t dev; 1320 struct uio *uio; 1321 int iomode; 1322 { 1323 struct st_softc *st = st_cd.cd_devs[STUNIT(dev)]; 1324 1325 return (physio(ststrategy, NULL, dev, B_WRITE, 1326 st->sc_link->adapter->scsipi_minphys, uio)); 1327 } 1328 1329 /* 1330 * Perform special action on behalf of the user; 1331 * knows about the internals of this device 1332 */ 1333 int 1334 stioctl(dev, cmd, arg, flag, p) 1335 dev_t dev; 1336 u_long cmd; 1337 caddr_t arg; 1338 int flag; 1339 struct proc *p; 1340 { 1341 int error = 0; 1342 int unit; 1343 int number, nmarks, dsty; 1344 int flags; 1345 struct st_softc *st; 1346 int hold_blksize; 1347 u_int8_t hold_density; 1348 struct mtop *mt = (struct mtop *) arg; 1349 1350 /* 1351 * Find the device that the user is talking about 1352 */ 1353 flags = 0; /* give error messages, act on errors etc. */ 1354 unit = STUNIT(dev); 1355 dsty = STDSTY(dev); 1356 st = st_cd.cd_devs[unit]; 1357 hold_blksize = st->blksize; 1358 hold_density = st->density; 1359 1360 switch ((u_int) cmd) { 1361 1362 case MTIOCGET: { 1363 struct mtget *g = (struct mtget *) arg; 1364 /* 1365 * (to get the current state of READONLY) 1366 */ 1367 error = st_mode_sense(st, XS_CTL_SILENT); 1368 if (error) 1369 break; 1370 SC_DEBUG(st->sc_link, SDEV_DB1, ("[ioctl: get status]\n")); 1371 bzero(g, sizeof(struct mtget)); 1372 g->mt_type = 0x7; /* Ultrix compat *//*? */ 1373 g->mt_blksiz = st->blksize; 1374 g->mt_density = st->density; 1375 g->mt_mblksiz[0] = st->modes[0].blksize; 1376 g->mt_mblksiz[1] = st->modes[1].blksize; 1377 g->mt_mblksiz[2] = st->modes[2].blksize; 1378 g->mt_mblksiz[3] = st->modes[3].blksize; 1379 g->mt_mdensity[0] = st->modes[0].density; 1380 g->mt_mdensity[1] = st->modes[1].density; 1381 g->mt_mdensity[2] = st->modes[2].density; 1382 g->mt_mdensity[3] = st->modes[3].density; 1383 if (st->flags & ST_READONLY) 1384 g->mt_dsreg |= MT_DS_RDONLY; 1385 if (st->flags & ST_MOUNTED) 1386 g->mt_dsreg |= MT_DS_MOUNTED; 1387 g->mt_resid = st->mt_resid; 1388 g->mt_erreg = st->mt_erreg; 1389 /* 1390 * clear latched errors. 1391 */ 1392 st->mt_resid = 0; 1393 st->mt_erreg = 0; 1394 st->asc = 0; 1395 st->ascq = 0; 1396 break; 1397 } 1398 case MTIOCTOP: { 1399 1400 SC_DEBUG(st->sc_link, SDEV_DB1, 1401 ("[ioctl: op=0x%x count=0x%x]\n", mt->mt_op, 1402 mt->mt_count)); 1403 1404 /* compat: in U*x it is a short */ 1405 number = mt->mt_count; 1406 switch ((short) (mt->mt_op)) { 1407 case MTWEOF: /* write an end-of-file record */ 1408 error = st_write_filemarks(st, number, flags); 1409 break; 1410 case MTBSF: /* backward space file */ 1411 number = -number; 1412 case MTFSF: /* forward space file */ 1413 error = st_check_eod(st, FALSE, &nmarks, flags); 1414 if (!error) 1415 error = st_space(st, number - nmarks, 1416 SP_FILEMARKS, flags); 1417 break; 1418 case MTBSR: /* backward space record */ 1419 number = -number; 1420 case MTFSR: /* forward space record */ 1421 error = st_check_eod(st, TRUE, &nmarks, flags); 1422 if (!error) 1423 error = st_space(st, number, SP_BLKS, flags); 1424 break; 1425 case MTREW: /* rewind */ 1426 error = st_rewind(st, 0, flags); 1427 break; 1428 case MTOFFL: /* rewind and put the drive offline */ 1429 st_unmount(st, EJECT); 1430 break; 1431 case MTNOP: /* no operation, sets status only */ 1432 break; 1433 case MTRETEN: /* retension the tape */ 1434 error = st_load(st, LD_RETENSION, flags); 1435 if (!error) 1436 error = st_load(st, LD_LOAD, flags); 1437 break; 1438 case MTEOM: /* forward space to end of media */ 1439 error = st_check_eod(st, FALSE, &nmarks, flags); 1440 if (!error) 1441 error = st_space(st, 1, SP_EOM, flags); 1442 break; 1443 case MTCACHE: /* enable controller cache */ 1444 st->flags &= ~ST_DONTBUFFER; 1445 goto try_new_value; 1446 case MTNOCACHE: /* disable controller cache */ 1447 st->flags |= ST_DONTBUFFER; 1448 goto try_new_value; 1449 case MTERASE: /* erase volume */ 1450 error = st_erase(st, number, flags); 1451 break; 1452 case MTSETBSIZ: /* Set block size for device */ 1453 #ifdef NOTYET 1454 if (!(st->flags & ST_NEW_MOUNT)) { 1455 uprintf("re-mount tape before changing blocksize"); 1456 error = EINVAL; 1457 break; 1458 } 1459 #endif 1460 if (number == 0) 1461 st->flags &= ~ST_FIXEDBLOCKS; 1462 else { 1463 if ((st->blkmin || st->blkmax) && 1464 (number < st->blkmin || 1465 number > st->blkmax)) { 1466 error = EINVAL; 1467 break; 1468 } 1469 st->flags |= ST_FIXEDBLOCKS; 1470 } 1471 st->blksize = number; 1472 st->flags |= ST_BLOCK_SET; /*XXX */ 1473 goto try_new_value; 1474 1475 case MTSETDNSTY: /* Set density for device and mode */ 1476 /* 1477 * Any number >= 0 and <= 0xff is legal. Numbers 1478 * above 0x80 are 'vendor unique'. 1479 */ 1480 if (number < 0 || number > 255) { 1481 error = EINVAL; 1482 break; 1483 } else 1484 st->density = number; 1485 goto try_new_value; 1486 1487 case MTCMPRESS: 1488 error = st_cmprss(st, number); 1489 break; 1490 1491 case MTEWARN: 1492 if (number) 1493 st->flags |= ST_EARLYWARN; 1494 else 1495 st->flags &= ~ST_EARLYWARN; 1496 break; 1497 1498 default: 1499 error = EINVAL; 1500 } 1501 break; 1502 } 1503 case MTIOCIEOT: 1504 case MTIOCEEOT: 1505 break; 1506 1507 case MTIOCRDSPOS: 1508 error = st_rdpos(st, 0, (u_int32_t *) arg); 1509 break; 1510 1511 case MTIOCRDHPOS: 1512 error = st_rdpos(st, 1, (u_int32_t *) arg); 1513 break; 1514 1515 case MTIOCSLOCATE: 1516 error = st_setpos(st, 0, (u_int32_t *) arg); 1517 break; 1518 1519 case MTIOCHLOCATE: 1520 error = st_setpos(st, 1, (u_int32_t *) arg); 1521 break; 1522 1523 1524 default: 1525 error = scsipi_do_ioctl(st->sc_link, dev, cmd, arg, 1526 flag, p); 1527 break; 1528 } 1529 return (error); 1530 /*-----------------------------*/ 1531 try_new_value: 1532 /* 1533 * Check that the mode being asked for is aggreeable to the 1534 * drive. If not, put it back the way it was. 1535 */ 1536 if ((error = st_mode_select(st, 0)) != 0) {/* put it back as it was */ 1537 printf("%s: cannot set selected mode\n", st->sc_dev.dv_xname); 1538 st->density = hold_density; 1539 st->blksize = hold_blksize; 1540 if (st->blksize) 1541 st->flags |= ST_FIXEDBLOCKS; 1542 else 1543 st->flags &= ~ST_FIXEDBLOCKS; 1544 return (error); 1545 } 1546 /* 1547 * As the drive liked it, if we are setting a new default, 1548 * set it into the structures as such. 1549 * 1550 * The means for deciding this are not finalised yet- but 1551 * if the device was opened in Control Mode, the values 1552 * are persistent now across mounts. 1553 */ 1554 if (STMODE(dev) == CTRL_MODE) { 1555 switch ((short) (mt->mt_op)) { 1556 case MTSETBSIZ: 1557 st->modes[dsty].blksize = st->blksize; 1558 st->modeflags[dsty] |= BLKSIZE_SET_BY_USER; 1559 break; 1560 case MTSETDNSTY: 1561 st->modes[dsty].density = st->density; 1562 st->modeflags[dsty] |= DENSITY_SET_BY_USER; 1563 break; 1564 } 1565 } 1566 return (0); 1567 } 1568 1569 /* 1570 * Do a synchronous read. 1571 */ 1572 int 1573 st_read(st, buf, size, flags) 1574 struct st_softc *st; 1575 int size; 1576 int flags; 1577 char *buf; 1578 { 1579 struct scsi_rw_tape cmd; 1580 1581 /* 1582 * If it's a null transfer, return immediatly 1583 */ 1584 if (size == 0) 1585 return (0); 1586 bzero(&cmd, sizeof(cmd)); 1587 cmd.opcode = READ; 1588 if (st->flags & ST_FIXEDBLOCKS) { 1589 cmd.byte2 |= SRW_FIXED; 1590 _lto3b(size / (st->blksize ? st->blksize : DEF_FIXED_BSIZE), 1591 cmd.len); 1592 } else 1593 _lto3b(size, cmd.len); 1594 return (scsipi_command(st->sc_link, 1595 (struct scsipi_generic *)&cmd, sizeof(cmd), 1596 (u_char *)buf, size, 0, ST_IO_TIME, NULL, flags | XS_CTL_DATA_IN)); 1597 } 1598 1599 /* 1600 * Ask the drive what it's min and max blk sizes are. 1601 */ 1602 int 1603 st_read_block_limits(st, flags) 1604 struct st_softc *st; 1605 int flags; 1606 { 1607 struct scsi_block_limits cmd; 1608 struct scsi_block_limits_data block_limits; 1609 struct scsipi_link *sc_link = st->sc_link; 1610 int error; 1611 1612 /* 1613 * First check if we have it all loaded 1614 */ 1615 if ((sc_link->flags & SDEV_MEDIA_LOADED)) 1616 return (0); 1617 1618 /* 1619 * do a 'Read Block Limits' 1620 */ 1621 bzero(&cmd, sizeof(cmd)); 1622 cmd.opcode = READ_BLOCK_LIMITS; 1623 1624 /* 1625 * do the command, update the global values 1626 */ 1627 error = scsipi_command(sc_link, (struct scsipi_generic *)&cmd, 1628 sizeof(cmd), (u_char *)&block_limits, sizeof(block_limits), 1629 ST_RETRIES, ST_CTL_TIME, NULL, flags | XS_CTL_DATA_IN); 1630 if (error) 1631 return (error); 1632 1633 st->blkmin = _2btol(block_limits.min_length); 1634 st->blkmax = _3btol(block_limits.max_length); 1635 1636 SC_DEBUG(sc_link, SDEV_DB3, 1637 ("(%d <= blksize <= %d)\n", st->blkmin, st->blkmax)); 1638 return (0); 1639 } 1640 1641 /* 1642 * Get the scsi driver to send a full inquiry to the 1643 * device and use the results to fill out the global 1644 * parameter structure. 1645 * 1646 * called from: 1647 * attach 1648 * open 1649 * ioctl (to reset original blksize) 1650 */ 1651 int 1652 st_mode_sense(st, flags) 1653 struct st_softc *st; 1654 int flags; 1655 { 1656 u_int scsipi_sense_len; 1657 int error; 1658 struct scsi_mode_sense cmd; 1659 struct scsipi_sense { 1660 struct scsi_mode_header header; 1661 struct scsi_blk_desc blk_desc; 1662 u_char sense_data[MAX_PAGE_0_SIZE]; 1663 } scsipi_sense; 1664 struct scsipi_link *sc_link = st->sc_link; 1665 1666 scsipi_sense_len = 12 + st->page_0_size; 1667 1668 /* 1669 * Set up a mode sense 1670 */ 1671 bzero(&cmd, sizeof(cmd)); 1672 cmd.opcode = SCSI_MODE_SENSE; 1673 cmd.length = scsipi_sense_len; 1674 1675 /* 1676 * do the command, but we don't need the results 1677 * just print them for our interest's sake, if asked, 1678 * or if we need it as a template for the mode select 1679 * store it away. 1680 */ 1681 error = scsipi_command(sc_link, (struct scsipi_generic *)&cmd, 1682 sizeof(cmd), (u_char *)&scsipi_sense, scsipi_sense_len, 1683 ST_RETRIES, ST_CTL_TIME, NULL, flags | XS_CTL_DATA_IN); 1684 if (error) 1685 return (error); 1686 1687 st->numblks = _3btol(scsipi_sense.blk_desc.nblocks); 1688 st->media_blksize = _3btol(scsipi_sense.blk_desc.blklen); 1689 st->media_density = scsipi_sense.blk_desc.density; 1690 if (scsipi_sense.header.dev_spec & SMH_DSP_WRITE_PROT) 1691 st->flags |= ST_READONLY; 1692 else 1693 st->flags &= ~ST_READONLY; 1694 SC_DEBUG(sc_link, SDEV_DB3, 1695 ("density code 0x%x, %d-byte blocks, write-%s, ", 1696 st->media_density, st->media_blksize, 1697 st->flags & ST_READONLY ? "protected" : "enabled")); 1698 SC_DEBUG(sc_link, SDEV_DB3, 1699 ("%sbuffered\n", 1700 scsipi_sense.header.dev_spec & SMH_DSP_BUFF_MODE ? "" : "un")); 1701 if (st->page_0_size) 1702 bcopy(scsipi_sense.sense_data, st->sense_data, 1703 st->page_0_size); 1704 sc_link->flags |= SDEV_MEDIA_LOADED; 1705 return (0); 1706 } 1707 1708 /* 1709 * Send a filled out parameter structure to the drive to 1710 * set it into the desire modes etc. 1711 */ 1712 int 1713 st_mode_select(st, flags) 1714 struct st_softc *st; 1715 int flags; 1716 { 1717 u_int scsi_select_len; 1718 struct scsi_mode_select cmd; 1719 struct scsi_select { 1720 struct scsi_mode_header header; 1721 struct scsi_blk_desc blk_desc; 1722 u_char sense_data[MAX_PAGE_0_SIZE]; 1723 } scsi_select; 1724 struct scsipi_link *sc_link = st->sc_link; 1725 1726 scsi_select_len = 12 + st->page_0_size; 1727 1728 /* 1729 * This quirk deals with drives that have only one valid mode 1730 * and think this gives them license to reject all mode selects, 1731 * even if the selected mode is the one that is supported. 1732 */ 1733 if (st->quirks & ST_Q_UNIMODAL) { 1734 SC_DEBUG(sc_link, SDEV_DB3, 1735 ("not setting density 0x%x blksize 0x%x\n", 1736 st->density, st->blksize)); 1737 return (0); 1738 } 1739 1740 /* 1741 * Set up for a mode select 1742 */ 1743 bzero(&cmd, sizeof(cmd)); 1744 cmd.opcode = SCSI_MODE_SELECT; 1745 cmd.length = scsi_select_len; 1746 1747 bzero(&scsi_select, scsi_select_len); 1748 scsi_select.header.blk_desc_len = sizeof(struct scsi_blk_desc); 1749 scsi_select.header.dev_spec &= ~SMH_DSP_BUFF_MODE; 1750 scsi_select.blk_desc.density = st->density; 1751 if (st->flags & ST_DONTBUFFER) 1752 scsi_select.header.dev_spec |= SMH_DSP_BUFF_MODE_OFF; 1753 else 1754 scsi_select.header.dev_spec |= SMH_DSP_BUFF_MODE_ON; 1755 if (st->flags & ST_FIXEDBLOCKS) 1756 _lto3b(st->blksize, scsi_select.blk_desc.blklen); 1757 if (st->page_0_size) 1758 bcopy(st->sense_data, scsi_select.sense_data, st->page_0_size); 1759 1760 /* 1761 * do the command 1762 */ 1763 return (scsipi_command(sc_link, (struct scsipi_generic *)&cmd, 1764 sizeof(cmd), (u_char *)&scsi_select, scsi_select_len, 1765 ST_RETRIES, ST_CTL_TIME, NULL, flags | XS_CTL_DATA_OUT)); 1766 } 1767 1768 int 1769 st_cmprss(st, onoff) 1770 struct st_softc *st; 1771 int onoff; 1772 { 1773 u_int scsi_dlen; 1774 struct scsi_mode_select mcmd; 1775 struct scsi_mode_sense scmd; 1776 struct scsi_select { 1777 struct scsi_mode_header header; 1778 struct scsi_blk_desc blk_desc; 1779 u_char pdata[max(sizeof(struct scsi_tape_dev_conf_page), 1780 sizeof(struct scsi_tape_dev_compression_page))]; 1781 } scsi_pdata; 1782 struct scsi_tape_dev_conf_page *ptr; 1783 struct scsi_tape_dev_compression_page *cptr; 1784 struct scsipi_link *sc_link = st->sc_link; 1785 int error, ison, flags; 1786 1787 scsi_dlen = sizeof(scsi_pdata); 1788 bzero(&scsi_pdata, scsi_dlen); 1789 1790 /* 1791 * Set up for a mode sense. 1792 * Do DATA COMPRESSION page first. 1793 */ 1794 bzero(&scmd, sizeof(scmd)); 1795 scmd.opcode = SCSI_MODE_SENSE; 1796 scmd.page = SMS_PAGE_CTRL_CURRENT | 0xf; 1797 scmd.length = scsi_dlen; 1798 1799 flags = XS_CTL_SILENT; 1800 1801 /* 1802 * Do the MODE SENSE command... 1803 */ 1804 again: 1805 bzero(&scsi_pdata, scsi_dlen); 1806 error = scsipi_command(sc_link, 1807 (struct scsipi_generic *)&scmd, sizeof(scmd), 1808 (u_char *)&scsi_pdata, scsi_dlen, 1809 ST_RETRIES, ST_CTL_TIME, NULL, flags | XS_CTL_DATA_IN); 1810 1811 if (error) { 1812 if (scmd.byte2 != SMS_DBD) { 1813 scmd.byte2 = SMS_DBD; 1814 goto again; 1815 } 1816 /* 1817 * Try a different page? 1818 */ 1819 if (scmd.page == (SMS_PAGE_CTRL_CURRENT | 0xf)) { 1820 scmd.page = SMS_PAGE_CTRL_CURRENT | 0x10; 1821 scmd.byte2 = 0; 1822 goto again; 1823 } 1824 return (error); 1825 } 1826 1827 if (scsi_pdata.header.blk_desc_len) 1828 ptr = (struct scsi_tape_dev_conf_page *) scsi_pdata.pdata; 1829 else 1830 ptr = (struct scsi_tape_dev_conf_page *) &scsi_pdata.blk_desc; 1831 1832 if ((scmd.page & SMS_PAGE_CODE) == 0xf) { 1833 cptr = (struct scsi_tape_dev_compression_page *) ptr; 1834 ison = (cptr->dce_dcc & DCP_DCE) != 0; 1835 if (onoff) 1836 cptr->dce_dcc |= DCP_DCE; 1837 else 1838 cptr->dce_dcc &= ~DCP_DCE; 1839 cptr->pagecode &= ~0x80; 1840 } else { 1841 ison = (ptr->sel_comp_alg != 0); 1842 if (onoff) 1843 ptr->sel_comp_alg = 1; 1844 else 1845 ptr->sel_comp_alg = 0; 1846 ptr->pagecode &= ~0x80; 1847 ptr->byte2 = 0; 1848 ptr->active_partition = 0; 1849 ptr->wb_full_ratio = 0; 1850 ptr->rb_empty_ratio = 0; 1851 ptr->byte8 &= ~0x30; 1852 ptr->gap_size = 0; 1853 ptr->byte10 &= ~0xe7; 1854 ptr->ew_bufsize[0] = 0; 1855 ptr->ew_bufsize[1] = 0; 1856 ptr->ew_bufsize[2] = 0; 1857 ptr->reserved = 0; 1858 } 1859 onoff = onoff ? 1 : 0; 1860 /* 1861 * There might be a virtue in actually doing the MODE SELECTS, 1862 * but let's not clog the bus over it. 1863 */ 1864 if (onoff == ison) 1865 return (0); 1866 1867 /* 1868 * Set up for a mode select 1869 */ 1870 1871 scsi_pdata.header.data_length = 0; 1872 scsi_pdata.header.medium_type = 0; 1873 if ((st->flags & ST_DONTBUFFER) == 0) 1874 scsi_pdata.header.dev_spec = SMH_DSP_BUFF_MODE_ON; 1875 else 1876 scsi_pdata.header.dev_spec = 0; 1877 1878 bzero(&mcmd, sizeof(mcmd)); 1879 mcmd.opcode = SCSI_MODE_SELECT; 1880 mcmd.byte2 = SMS_PF; 1881 mcmd.length = scsi_dlen; 1882 if (scsi_pdata.header.blk_desc_len) { 1883 scsi_pdata.blk_desc.density = 0; 1884 scsi_pdata.blk_desc.nblocks[0] = 0; 1885 scsi_pdata.blk_desc.nblocks[1] = 0; 1886 scsi_pdata.blk_desc.nblocks[2] = 0; 1887 } 1888 1889 /* 1890 * Do the command 1891 */ 1892 error = scsipi_command(sc_link, 1893 (struct scsipi_generic *)&mcmd, sizeof(mcmd), 1894 (u_char *)&scsi_pdata, scsi_dlen, 1895 ST_RETRIES, ST_CTL_TIME, NULL, flags | XS_CTL_DATA_OUT); 1896 1897 if (error && (scmd.page & SMS_PAGE_CODE) == 0xf) { 1898 /* 1899 * Try DEVICE CONFIGURATION page. 1900 */ 1901 scmd.page = SMS_PAGE_CTRL_CURRENT | 0x10; 1902 goto again; 1903 } 1904 return (error); 1905 } 1906 /* 1907 * issue an erase command 1908 */ 1909 int 1910 st_erase(st, full, flags) 1911 struct st_softc *st; 1912 int full, flags; 1913 { 1914 int tmo; 1915 struct scsi_erase cmd; 1916 1917 /* 1918 * Full erase means set LONG bit in erase command, which asks 1919 * the drive to erase the entire unit. Without this bit, we're 1920 * asking the drive to write an erase gap. 1921 */ 1922 bzero(&cmd, sizeof(cmd)); 1923 cmd.opcode = ERASE; 1924 if (full) { 1925 cmd.byte2 = SE_IMMED|SE_LONG; 1926 tmo = ST_SPC_TIME; 1927 } else { 1928 tmo = ST_IO_TIME; 1929 cmd.byte2 = SE_IMMED; 1930 } 1931 1932 /* 1933 * XXX We always do this asynchronously, for now. How long should 1934 * we wait if we want to (eventually) to it synchronously? 1935 */ 1936 return (scsipi_command(st->sc_link, 1937 (struct scsipi_generic *)&cmd, sizeof(cmd), 1938 0, 0, ST_RETRIES, tmo, NULL, flags)); 1939 } 1940 1941 /* 1942 * skip N blocks/filemarks/seq filemarks/eom 1943 */ 1944 int 1945 st_space(st, number, what, flags) 1946 struct st_softc *st; 1947 u_int what; 1948 int flags; 1949 int number; 1950 { 1951 struct scsi_space cmd; 1952 int error; 1953 1954 switch (what) { 1955 case SP_BLKS: 1956 if (st->flags & ST_PER_ACTION) { 1957 if (number > 0) { 1958 st->flags &= ~ST_PER_ACTION; 1959 return (EIO); 1960 } else if (number < 0) { 1961 if (st->flags & ST_AT_FILEMARK) { 1962 /* 1963 * Handling of ST_AT_FILEMARK 1964 * in st_space will fill in the 1965 * right file mark count. 1966 */ 1967 error = st_space(st, 0, SP_FILEMARKS, 1968 flags); 1969 if (error) 1970 return (error); 1971 } 1972 if (st->flags & ST_BLANK_READ) { 1973 st->flags &= ~ST_BLANK_READ; 1974 return (EIO); 1975 } 1976 st->flags &= ~(ST_EIO_PENDING|ST_EOM_PENDING); 1977 } 1978 } 1979 break; 1980 case SP_FILEMARKS: 1981 if (st->flags & ST_EIO_PENDING) { 1982 if (number > 0) { 1983 /* pretend we just discovered the error */ 1984 st->flags &= ~ST_EIO_PENDING; 1985 return (EIO); 1986 } else if (number < 0) { 1987 /* back away from the error */ 1988 st->flags &= ~ST_EIO_PENDING; 1989 } 1990 } 1991 if (st->flags & ST_AT_FILEMARK) { 1992 st->flags &= ~ST_AT_FILEMARK; 1993 number--; 1994 } 1995 if ((st->flags & ST_BLANK_READ) && (number < 0)) { 1996 /* back away from unwritten tape */ 1997 st->flags &= ~ST_BLANK_READ; 1998 number++; /* XXX dubious */ 1999 } 2000 break; 2001 case SP_EOM: 2002 if (st->flags & ST_EOM_PENDING) { 2003 /* we're already there */ 2004 st->flags &= ~ST_EOM_PENDING; 2005 return (0); 2006 } 2007 if (st->flags & ST_EIO_PENDING) { 2008 /* pretend we just discovered the error */ 2009 st->flags &= ~ST_EIO_PENDING; 2010 return (EIO); 2011 } 2012 if (st->flags & ST_AT_FILEMARK) 2013 st->flags &= ~ST_AT_FILEMARK; 2014 break; 2015 } 2016 if (number == 0) 2017 return (0); 2018 2019 bzero(&cmd, sizeof(cmd)); 2020 cmd.opcode = SPACE; 2021 cmd.byte2 = what; 2022 _lto3b(number, cmd.number); 2023 2024 return (scsipi_command(st->sc_link, 2025 (struct scsipi_generic *)&cmd, sizeof(cmd), 2026 0, 0, 0, ST_SPC_TIME, NULL, flags)); 2027 } 2028 2029 /* 2030 * write N filemarks 2031 */ 2032 int 2033 st_write_filemarks(st, number, flags) 2034 struct st_softc *st; 2035 int flags; 2036 int number; 2037 { 2038 struct scsi_write_filemarks cmd; 2039 2040 /* 2041 * It's hard to write a negative number of file marks. 2042 * Don't try. 2043 */ 2044 if (number < 0) 2045 return (EINVAL); 2046 switch (number) { 2047 case 0: /* really a command to sync the drive's buffers */ 2048 break; 2049 case 1: 2050 if (st->flags & ST_FM_WRITTEN) /* already have one down */ 2051 st->flags &= ~ST_WRITTEN; 2052 else 2053 st->flags |= ST_FM_WRITTEN; 2054 st->flags &= ~ST_PER_ACTION; 2055 break; 2056 default: 2057 st->flags &= ~(ST_PER_ACTION | ST_WRITTEN); 2058 } 2059 2060 bzero(&cmd, sizeof(cmd)); 2061 cmd.opcode = WRITE_FILEMARKS; 2062 _lto3b(number, cmd.number); 2063 2064 return (scsipi_command(st->sc_link, 2065 (struct scsipi_generic *)&cmd, sizeof(cmd), 2066 0, 0, 0, ST_IO_TIME * 4, NULL, flags)); 2067 } 2068 2069 /* 2070 * Make sure the right number of file marks is on tape if the 2071 * tape has been written. If the position argument is true, 2072 * leave the tape positioned where it was originally. 2073 * 2074 * nmarks returns the number of marks to skip (or, if position 2075 * true, which were skipped) to get back original position. 2076 */ 2077 int 2078 st_check_eod(st, position, nmarks, flags) 2079 struct st_softc *st; 2080 boolean position; 2081 int *nmarks; 2082 int flags; 2083 { 2084 int error; 2085 2086 switch (st->flags & (ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD)) { 2087 default: 2088 *nmarks = 0; 2089 return (0); 2090 case ST_WRITTEN: 2091 case ST_WRITTEN | ST_FM_WRITTEN | ST_2FM_AT_EOD: 2092 *nmarks = 1; 2093 break; 2094 case ST_WRITTEN | ST_2FM_AT_EOD: 2095 *nmarks = 2; 2096 } 2097 error = st_write_filemarks(st, *nmarks, flags); 2098 if (position && !error) 2099 error = st_space(st, -*nmarks, SP_FILEMARKS, flags); 2100 return (error); 2101 } 2102 2103 /* 2104 * load/unload/retension 2105 */ 2106 int 2107 st_load(st, type, flags) 2108 struct st_softc *st; 2109 u_int type; 2110 int flags; 2111 { 2112 int error; 2113 struct scsi_load cmd; 2114 2115 if (type != LD_LOAD) { 2116 int nmarks; 2117 2118 error = st_check_eod(st, FALSE, &nmarks, flags); 2119 if (error) { 2120 printf("%s: failed to write closing filemarks at " 2121 "unload, errno=%d\n", st->sc_dev.dv_xname, error); 2122 return (error); 2123 } 2124 } 2125 if (st->quirks & ST_Q_IGNORE_LOADS) { 2126 if (type == LD_LOAD) { 2127 /* 2128 * If we ignore loads, at least we should try a rewind. 2129 */ 2130 return st_rewind(st, 0, flags); 2131 } 2132 /* otherwise, we should do what's asked of us */ 2133 } 2134 2135 bzero(&cmd, sizeof(cmd)); 2136 cmd.opcode = LOAD; 2137 cmd.how = type; 2138 2139 error = scsipi_command(st->sc_link, 2140 (struct scsipi_generic *)&cmd, sizeof(cmd), 2141 0, 0, ST_RETRIES, ST_SPC_TIME, NULL, flags); 2142 if (error) { 2143 printf("%s: error %d in st_load (op %d)\n", 2144 st->sc_dev.dv_xname, error, type); 2145 } 2146 return (error); 2147 } 2148 2149 /* 2150 * Rewind the device 2151 */ 2152 int 2153 st_rewind(st, immediate, flags) 2154 struct st_softc *st; 2155 u_int immediate; 2156 int flags; 2157 { 2158 struct scsi_rewind cmd; 2159 int error; 2160 int nmarks; 2161 2162 error = st_check_eod(st, FALSE, &nmarks, flags); 2163 if (error) { 2164 printf("%s: failed to write closing filemarks at " 2165 "rewind, errno=%d\n", st->sc_dev.dv_xname, error); 2166 return (error); 2167 } 2168 st->flags &= ~ST_PER_ACTION; 2169 2170 bzero(&cmd, sizeof(cmd)); 2171 cmd.opcode = REWIND; 2172 cmd.byte2 = immediate; 2173 2174 error = scsipi_command(st->sc_link, 2175 (struct scsipi_generic *)&cmd, sizeof(cmd), 0, 0, ST_RETRIES, 2176 immediate ? ST_CTL_TIME: ST_SPC_TIME, NULL, flags); 2177 if (error) { 2178 printf("%s: error %d trying to rewind\n", 2179 st->sc_dev.dv_xname, error); 2180 } 2181 return (error); 2182 } 2183 2184 int 2185 st_rdpos(st, hard, blkptr) 2186 struct st_softc *st; 2187 int hard; 2188 u_int32_t *blkptr; 2189 { 2190 int error; 2191 u_int8_t posdata[20]; 2192 struct scsi_tape_read_position cmd; 2193 2194 /* 2195 * First flush any pending writes... 2196 */ 2197 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 2198 2199 /* 2200 * The latter case is for 'write protected' tapes 2201 * which are too stupid to recognize a zero count 2202 * for writing filemarks as a no-op. 2203 */ 2204 if (error != 0 && error != EACCES && error != EROFS) 2205 return (error); 2206 2207 bzero(&cmd, sizeof(cmd)); 2208 bzero(&posdata, sizeof(posdata)); 2209 cmd.opcode = READ_POSITION; 2210 if (hard) 2211 cmd.byte1 = 1; 2212 2213 error = scsipi_command(st->sc_link, 2214 (struct scsipi_generic *)&cmd, sizeof(cmd), (u_char *)&posdata, 2215 sizeof(posdata), ST_RETRIES, ST_CTL_TIME, NULL, 2216 XS_CTL_SILENT | XS_CTL_DATA_IN); 2217 2218 if (error == 0) { 2219 #if 0 2220 printf("posdata:"); 2221 for (hard = 0; hard < sizeof(posdata); hard++) 2222 printf("%02x ", posdata[hard] & 0xff); 2223 printf("\n"); 2224 #endif 2225 if (posdata[0] & 0x4) /* Block Position Unknown */ 2226 error = EINVAL; 2227 else 2228 *blkptr = _4btol(&posdata[4]); 2229 } 2230 return (error); 2231 } 2232 2233 int 2234 st_setpos(st, hard, blkptr) 2235 struct st_softc *st; 2236 int hard; 2237 u_int32_t *blkptr; 2238 { 2239 int error; 2240 struct scsi_tape_locate cmd; 2241 2242 /* 2243 * First flush any pending writes. Strictly speaking, 2244 * we're not supposed to have to worry about this, 2245 * but let's be untrusting. 2246 */ 2247 error = st_write_filemarks(st, 0, XS_CTL_SILENT); 2248 2249 /* 2250 * The latter case is for 'write protected' tapes 2251 * which are too stupid to recognize a zero count 2252 * for writing filemarks as a no-op. 2253 */ 2254 if (error != 0 && error != EACCES && error != EROFS) 2255 return (error); 2256 2257 bzero(&cmd, sizeof(cmd)); 2258 cmd.opcode = LOCATE; 2259 if (hard) 2260 cmd.byte2 = 1 << 2; 2261 _lto4b(*blkptr, cmd.blkaddr); 2262 error = scsipi_command(st->sc_link, 2263 (struct scsipi_generic *)&cmd, sizeof(cmd), 2264 NULL, 0, ST_RETRIES, ST_SPC_TIME, NULL, 0); 2265 /* 2266 * XXX: Note file && block number position now unknown (if 2267 * XXX: these things ever start being maintained in this driver) 2268 */ 2269 return (error); 2270 } 2271 2272 2273 /* 2274 * Look at the returned sense and act on the error and determine 2275 * the unix error number to pass back..., 0 (== report no error), 2276 * -1 = retry the operation, -2 continue error processing. 2277 */ 2278 int 2279 st_interpret_sense(xs) 2280 struct scsipi_xfer *xs; 2281 { 2282 struct scsipi_link *sc_link = xs->sc_link; 2283 struct scsipi_sense_data *sense = &xs->sense.scsi_sense; 2284 struct buf *bp = xs->bp; 2285 struct st_softc *st = sc_link->device_softc; 2286 int retval = SCSIRET_CONTINUE; 2287 int doprint = ((xs->xs_control & XS_CTL_SILENT) == 0); 2288 u_int8_t key; 2289 int32_t info; 2290 2291 /* 2292 * If it isn't a extended or extended/deferred error, let 2293 * the generic code handle it. 2294 */ 2295 if ((sense->error_code & SSD_ERRCODE) != 0x70 && 2296 (sense->error_code & SSD_ERRCODE) != 0x71) { /* DEFFERRED */ 2297 return (retval); 2298 } 2299 2300 if (sense->error_code & SSD_ERRCODE_VALID) 2301 info = _4btol(sense->info); 2302 else 2303 info = xs->datalen; /* bad choice if fixed blocks */ 2304 key = sense->flags & SSD_KEY; 2305 st->mt_erreg = key; 2306 st->asc = sense->add_sense_code; 2307 st->ascq = sense->add_sense_code_qual; 2308 st->mt_resid = (short) info; 2309 2310 /* 2311 * If the device is not open yet, let generic handle 2312 */ 2313 if ((sc_link->flags & SDEV_OPEN) == 0) { 2314 return (retval); 2315 } 2316 2317 2318 if (st->flags & ST_FIXEDBLOCKS) { 2319 xs->resid = info * st->blksize; 2320 if (sense->flags & SSD_EOM) { 2321 if ((st->flags & ST_EARLYWARN) == 0) 2322 st->flags |= ST_EIO_PENDING; 2323 st->flags |= ST_EOM_PENDING; 2324 if (bp) 2325 bp->b_resid = xs->resid; 2326 } 2327 if (sense->flags & SSD_FILEMARK) { 2328 st->flags |= ST_AT_FILEMARK; 2329 if (bp) 2330 bp->b_resid = xs->resid; 2331 } 2332 if (sense->flags & SSD_ILI) { 2333 st->flags |= ST_EIO_PENDING; 2334 if (bp) 2335 bp->b_resid = xs->resid; 2336 if (sense->error_code & SSD_ERRCODE_VALID && 2337 (xs->xs_control & XS_CTL_SILENT) == 0) 2338 printf("%s: block wrong size, %d blocks " 2339 "residual\n", st->sc_dev.dv_xname, info); 2340 2341 /* 2342 * This quirk code helps the drive read 2343 * the first tape block, regardless of 2344 * format. That is required for these 2345 * drives to return proper MODE SENSE 2346 * information. 2347 */ 2348 if ((st->quirks & ST_Q_SENSE_HELP) && 2349 !(sc_link->flags & SDEV_MEDIA_LOADED)) 2350 st->blksize -= 512; 2351 } 2352 /* 2353 * If data wanted and no data was tranfered, do it immediatly 2354 */ 2355 if (xs->datalen && xs->resid >= xs->datalen) { 2356 if (st->flags & ST_EIO_PENDING) 2357 return (EIO); 2358 if (st->flags & ST_AT_FILEMARK) { 2359 if (bp) 2360 bp->b_resid = xs->resid; 2361 return (SCSIRET_NOERROR); 2362 } 2363 } 2364 } else { /* must be variable mode */ 2365 if (sense->flags & SSD_EOM) { 2366 /* 2367 * The current semantics of this 2368 * driver requires EOM detection 2369 * to return EIO unless early 2370 * warning detection is enabled 2371 * for variable mode (this is always 2372 * on for fixed block mode). 2373 */ 2374 if (st->flags & ST_EARLYWARN) { 2375 st->flags |= ST_EOM_PENDING; 2376 retval = SCSIRET_NOERROR; 2377 } else { 2378 retval = EIO; 2379 } 2380 2381 /* 2382 * If it's an unadorned EOM detection, 2383 * suppress printing an error. 2384 */ 2385 if (key == SKEY_NO_SENSE) { 2386 doprint = 0; 2387 } 2388 } else if (sense->flags & SSD_FILEMARK) { 2389 retval = SCSIRET_NOERROR; 2390 } else if (sense->flags & SSD_ILI) { 2391 if (info < 0) { 2392 /* 2393 * The tape record was bigger than the read 2394 * we issued. 2395 */ 2396 if ((xs->xs_control & XS_CTL_SILENT) == 0) { 2397 printf("%s: %d-byte tape record too big" 2398 " for %d-byte user buffer\n", 2399 st->sc_dev.dv_xname, 2400 xs->datalen - info, xs->datalen); 2401 } 2402 retval = EIO; 2403 } else { 2404 retval = SCSIRET_NOERROR; 2405 } 2406 } 2407 xs->resid = info; 2408 if (bp) 2409 bp->b_resid = info; 2410 } 2411 2412 #ifndef SCSIDEBUG 2413 if (retval == SCSIRET_NOERROR && key == SKEY_NO_SENSE) { 2414 doprint = 0; 2415 } 2416 #endif 2417 if (key == SKEY_BLANK_CHECK) { 2418 /* 2419 * This quirk code helps the drive read the 2420 * first tape block, regardless of format. That 2421 * is required for these drives to return proper 2422 * MODE SENSE information. 2423 */ 2424 if ((st->quirks & ST_Q_SENSE_HELP) && 2425 !(sc_link->flags & SDEV_MEDIA_LOADED)) { 2426 /* still starting */ 2427 st->blksize -= 512; 2428 } else if (!(st->flags & (ST_2FM_AT_EOD | ST_BLANK_READ))) { 2429 st->flags |= ST_BLANK_READ; 2430 xs->resid = xs->datalen; 2431 if (bp) { 2432 bp->b_resid = xs->resid; 2433 /* return an EOF */ 2434 } 2435 retval = SCSIRET_NOERROR; 2436 } 2437 } 2438 #ifdef SCSIVERBOSE 2439 if (doprint) { 2440 scsipi_print_sense(xs, 0); 2441 } 2442 #else 2443 if (doprint) { 2444 xs->sc_link->sc_print_addr(xs->sc_link); 2445 printf("Sense Key 0x%02x", key); 2446 if ((sense->error_code & SSD_ERRCODE_VALID) != 0) { 2447 switch (key) { 2448 case SKEY_NOT_READY: 2449 case SKEY_ILLEGAL_REQUEST: 2450 case SKEY_UNIT_ATTENTION: 2451 case SKEY_WRITE_PROTECT: 2452 break; 2453 case SKEY_BLANK_CHECK: 2454 printf(", requested size: %d (decimal)", info); 2455 break; 2456 case SKEY_ABORTED_COMMAND: 2457 if (xs->retries) 2458 printf(", retrying"); 2459 printf(", cmd 0x%x, info 0x%x", 2460 xs->cmd->opcode, info); 2461 break; 2462 default: 2463 printf(", info = %d (decimal)", info); 2464 } 2465 } 2466 if (sense->extra_len != 0) { 2467 int n; 2468 printf(", data ="); 2469 for (n = 0; n < sense->extra_len; n++) 2470 printf(" %02x", sense->cmd_spec_info[n]); 2471 } 2472 printf("\n"); 2473 } 2474 #endif 2475 return (retval); 2476 } 2477 2478 /* 2479 * The quirk here is that the drive returns some value to st_mode_sense 2480 * incorrectly until the tape has actually passed by the head. 2481 * 2482 * The method is to set the drive to large fixed-block state (user-specified 2483 * density and 1024-byte blocks), then read and rewind to get it to sense the 2484 * tape. If that doesn't work, try 512-byte fixed blocks. If that doesn't 2485 * work, as a last resort, try variable- length blocks. The result will be 2486 * the ability to do an accurate st_mode_sense. 2487 * 2488 * We know we can do a rewind because we just did a load, which implies rewind. 2489 * Rewind seems preferable to space backward if we have a virgin tape. 2490 * 2491 * The rest of the code for this quirk is in ILI processing and BLANK CHECK 2492 * error processing, both part of st_interpret_sense. 2493 */ 2494 int 2495 st_touch_tape(st) 2496 struct st_softc *st; 2497 { 2498 char *buf; 2499 int readsize; 2500 int error; 2501 2502 buf = malloc(1024, M_TEMP, M_NOWAIT); 2503 if (buf == NULL) 2504 return (ENOMEM); 2505 2506 if ((error = st_mode_sense(st, 0)) != 0) 2507 goto bad; 2508 st->blksize = 1024; 2509 do { 2510 switch (st->blksize) { 2511 case 512: 2512 case 1024: 2513 readsize = st->blksize; 2514 st->flags |= ST_FIXEDBLOCKS; 2515 break; 2516 default: 2517 readsize = 1; 2518 st->flags &= ~ST_FIXEDBLOCKS; 2519 } 2520 if ((error = st_mode_select(st, 0)) != 0) 2521 goto bad; 2522 st_read(st, buf, readsize, XS_CTL_SILENT); /* XXX */ 2523 if ((error = st_rewind(st, 0, 0)) != 0) { 2524 bad: free(buf, M_TEMP); 2525 return (error); 2526 } 2527 } while (readsize != 1 && readsize > st->blksize); 2528 2529 free(buf, M_TEMP); 2530 return (0); 2531 } 2532 2533 int 2534 stdump(dev, blkno, va, size) 2535 dev_t dev; 2536 daddr_t blkno; 2537 caddr_t va; 2538 size_t size; 2539 { 2540 2541 /* Not implemented. */ 2542 return (ENXIO); 2543 } 2544