1 /* 2 * $FreeBSD: src/sys/cam/scsi/scsi_sa.c,v 1.45.2.13 2002/12/17 17:08:50 trhodes Exp $ 3 * $DragonFly: src/sys/bus/cam/scsi/scsi_sa.c,v 1.35 2008/05/18 20:30:20 pavalos Exp $ 4 * 5 * Implementation of SCSI Sequential Access Peripheral driver for CAM. 6 * 7 * Copyright (c) 1999, 2000 Matthew Jacob 8 * All rights reserved. 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 * without modification, immediately at the beginning of the file. 16 * 2. The name of the author may not be used to endorse or promote products 17 * derived from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 23 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 */ 32 33 #include <sys/param.h> 34 #include <sys/queue.h> 35 #ifdef _KERNEL 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #endif 39 #include <sys/types.h> 40 #ifdef _KERNEL 41 #include <sys/buf.h> 42 #include <sys/malloc.h> 43 #endif 44 #include <sys/mtio.h> 45 #include <sys/conf.h> 46 #ifdef _KERNEL 47 #include <sys/proc.h> 48 #include <sys/buf2.h> 49 #include <sys/thread2.h> 50 #endif 51 #include <sys/fcntl.h> 52 #include <sys/devicestat.h> 53 #include <machine/limits.h> 54 55 #ifndef _KERNEL 56 #include <stdio.h> 57 #include <string.h> 58 #endif 59 60 #include "../cam.h" 61 #include "../cam_ccb.h" 62 #include "../cam_extend.h" 63 #include "../cam_periph.h" 64 #include "../cam_xpt_periph.h" 65 #include "../cam_debug.h" 66 67 #include "scsi_all.h" 68 #include "scsi_message.h" 69 #include "scsi_sa.h" 70 71 #ifdef _KERNEL 72 73 #include <opt_sa.h> 74 75 #ifndef SA_IO_TIMEOUT 76 #define SA_IO_TIMEOUT 4 77 #endif 78 #ifndef SA_SPACE_TIMEOUT 79 #define SA_SPACE_TIMEOUT 1 * 60 80 #endif 81 #ifndef SA_REWIND_TIMEOUT 82 #define SA_REWIND_TIMEOUT 2 * 60 83 #endif 84 #ifndef SA_ERASE_TIMEOUT 85 #define SA_ERASE_TIMEOUT 4 * 60 86 #endif 87 88 #define SCSIOP_TIMEOUT (60 * 1000) /* not an option */ 89 90 #define IO_TIMEOUT (SA_IO_TIMEOUT * 60 * 1000) 91 #define REWIND_TIMEOUT (SA_REWIND_TIMEOUT * 60 * 1000) 92 #define ERASE_TIMEOUT (SA_ERASE_TIMEOUT * 60 * 1000) 93 #define SPACE_TIMEOUT (SA_SPACE_TIMEOUT * 60 * 1000) 94 95 /* 96 * Additional options that can be set for config: SA_1FM_AT_EOT 97 */ 98 99 #ifndef UNUSED_PARAMETER 100 #define UNUSED_PARAMETER(x) x = x 101 #endif 102 103 #define QFRLS(ccb) \ 104 if (((ccb)->ccb_h.status & CAM_DEV_QFRZN) != 0) \ 105 cam_release_devq((ccb)->ccb_h.path, 0, 0, 0, FALSE) 106 107 /* 108 * Driver states 109 */ 110 111 MALLOC_DEFINE(M_SCSISA, "SCSI sa", "SCSI sequential access buffers"); 112 113 typedef enum { 114 SA_STATE_NORMAL, SA_STATE_ABNORMAL 115 } sa_state; 116 117 #define ccb_pflags ppriv_field0 118 #define ccb_bio ppriv_ptr1 119 120 #define SA_CCB_BUFFER_IO 0x0 121 #define SA_CCB_WAITING 0x1 122 #define SA_CCB_TYPEMASK 0x1 123 #define SA_POSITION_UPDATED 0x2 124 125 #define Set_CCB_Type(x, type) \ 126 x->ccb_h.ccb_pflags &= ~SA_CCB_TYPEMASK; \ 127 x->ccb_h.ccb_pflags |= type 128 129 #define CCB_Type(x) (x->ccb_h.ccb_pflags & SA_CCB_TYPEMASK) 130 131 132 133 typedef enum { 134 SA_FLAG_OPEN = 0x0001, 135 SA_FLAG_FIXED = 0x0002, 136 SA_FLAG_TAPE_LOCKED = 0x0004, 137 SA_FLAG_TAPE_MOUNTED = 0x0008, 138 SA_FLAG_TAPE_WP = 0x0010, 139 SA_FLAG_TAPE_WRITTEN = 0x0020, 140 SA_FLAG_EOM_PENDING = 0x0040, 141 SA_FLAG_EIO_PENDING = 0x0080, 142 SA_FLAG_EOF_PENDING = 0x0100, 143 SA_FLAG_ERR_PENDING = (SA_FLAG_EOM_PENDING|SA_FLAG_EIO_PENDING| 144 SA_FLAG_EOF_PENDING), 145 SA_FLAG_INVALID = 0x0200, 146 SA_FLAG_COMP_ENABLED = 0x0400, 147 SA_FLAG_COMP_SUPP = 0x0800, 148 SA_FLAG_COMP_UNSUPP = 0x1000, 149 SA_FLAG_TAPE_FROZEN = 0x2000 150 } sa_flags; 151 152 typedef enum { 153 SA_MODE_REWIND = 0x00, 154 SA_MODE_NOREWIND = 0x01, 155 SA_MODE_OFFLINE = 0x02 156 } sa_mode; 157 158 typedef enum { 159 SA_PARAM_NONE = 0x00, 160 SA_PARAM_BLOCKSIZE = 0x01, 161 SA_PARAM_DENSITY = 0x02, 162 SA_PARAM_COMPRESSION = 0x04, 163 SA_PARAM_BUFF_MODE = 0x08, 164 SA_PARAM_NUMBLOCKS = 0x10, 165 SA_PARAM_WP = 0x20, 166 SA_PARAM_SPEED = 0x40, 167 SA_PARAM_ALL = 0x7f 168 } sa_params; 169 170 typedef enum { 171 SA_QUIRK_NONE = 0x00, 172 SA_QUIRK_NOCOMP = 0x01, /* Can't deal with compression at all */ 173 SA_QUIRK_FIXED = 0x02, /* Force fixed mode */ 174 SA_QUIRK_VARIABLE = 0x04, /* Force variable mode */ 175 SA_QUIRK_2FM = 0x08, /* Needs Two File Marks at EOD */ 176 SA_QUIRK_1FM = 0x10, /* No more than 1 File Mark at EOD */ 177 SA_QUIRK_NODREAD = 0x20, /* Don't try and dummy read density */ 178 SA_QUIRK_NO_MODESEL = 0x40, /* Don't do mode select at all */ 179 SA_QUIRK_NO_CPAGE = 0x80 /* Don't use DEVICE COMPRESSION page */ 180 } sa_quirks; 181 182 /* units are bits 4-7, 16-21 (1024 units) */ 183 #define SAUNIT(DEV) \ 184 (((minor(DEV) & 0xF0) >> 4) | ((minor(DEV) & 0x3f0000) >> 16)) 185 186 #define SAMODE(z) ((minor(z) & 0x3)) 187 #define SADENSITY(z) (((minor(z) >> 2) & 0x3)) 188 #define SA_IS_CTRL(z) (minor(z) & (1 << 29)) 189 190 #define SA_NOT_CTLDEV 0 191 #define SA_CTLDEV 1 192 193 #define SA_ATYPE_R 0 194 #define SA_ATYPE_NR 1 195 #define SA_ATYPE_ER 2 196 197 #define SAMINOR(ctl, unit, mode, access) \ 198 ((ctl << 29) | ((unit & 0x3f0) << 16) | ((unit & 0xf) << 4) | \ 199 (mode << 0x2) | (access & 0x3)) 200 201 #define SA_UNITMASK SAMINOR(0, -1, 0, 0) 202 #define SA_UNIT(unit) SAMINOR(0, unit, 0, 0) 203 204 #define SA_NUM_MODES 4 205 206 struct sa_softc { 207 sa_state state; 208 sa_flags flags; 209 sa_quirks quirks; 210 struct bio_queue_head bio_queue; 211 int queue_count; 212 struct devstat device_stats; 213 int blk_gran; 214 int blk_mask; 215 int blk_shift; 216 u_int32_t max_blk; 217 u_int32_t min_blk; 218 u_int32_t comp_algorithm; 219 u_int32_t saved_comp_algorithm; 220 u_int32_t media_blksize; 221 u_int32_t last_media_blksize; 222 u_int32_t media_numblks; 223 u_int8_t media_density; 224 u_int8_t speed; 225 u_int8_t scsi_rev; 226 u_int8_t dsreg; /* mtio mt_dsreg, redux */ 227 int buffer_mode; 228 int filemarks; 229 union ccb saved_ccb; 230 int last_resid_was_io; 231 232 /* 233 * Relative to BOT Location. 234 */ 235 daddr_t fileno; 236 daddr_t blkno; 237 238 /* 239 * Latched Error Info 240 */ 241 struct { 242 struct scsi_sense_data _last_io_sense; 243 u_int32_t _last_io_resid; 244 u_int8_t _last_io_cdb[CAM_MAX_CDBLEN]; 245 struct scsi_sense_data _last_ctl_sense; 246 u_int32_t _last_ctl_resid; 247 u_int8_t _last_ctl_cdb[CAM_MAX_CDBLEN]; 248 #define last_io_sense errinfo._last_io_sense 249 #define last_io_resid errinfo._last_io_resid 250 #define last_io_cdb errinfo._last_io_cdb 251 #define last_ctl_sense errinfo._last_ctl_sense 252 #define last_ctl_resid errinfo._last_ctl_resid 253 #define last_ctl_cdb errinfo._last_ctl_cdb 254 } errinfo; 255 /* 256 * Misc other flags/state 257 */ 258 u_int32_t 259 : 29, 260 open_rdonly : 1, /* open read-only */ 261 open_pending_mount : 1, /* open pending mount */ 262 ctrl_mode : 1; /* control device open */ 263 }; 264 265 struct sa_quirk_entry { 266 struct scsi_inquiry_pattern inq_pat; /* matching pattern */ 267 sa_quirks quirks; /* specific quirk type */ 268 u_int32_t prefblk; /* preferred blocksize when in fixed mode */ 269 }; 270 271 static struct sa_quirk_entry sa_quirk_table[] = 272 { 273 { 274 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "OnStream", 275 "ADR*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_NODREAD | 276 SA_QUIRK_1FM|SA_QUIRK_NO_MODESEL, 32768 277 }, 278 { 279 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE", 280 "Python 06408*", "*"}, SA_QUIRK_NODREAD, 0 281 }, 282 { 283 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE", 284 "Python 25601*", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_NODREAD, 0 285 }, 286 { 287 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE", 288 "Python*", "*"}, SA_QUIRK_NODREAD, 0 289 }, 290 { 291 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE", 292 "VIPER 150*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512 293 }, 294 { 295 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE", 296 "VIPER 2525 25462", "-011"}, 297 SA_QUIRK_NOCOMP|SA_QUIRK_1FM|SA_QUIRK_NODREAD, 0 298 }, 299 { 300 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE", 301 "VIPER 2525*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 1024 302 }, 303 #if 0 304 { 305 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP", 306 "C15*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_NO_CPAGE, 0, 307 }, 308 #endif 309 { 310 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP", 311 "C56*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0 312 }, 313 { 314 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP", 315 "T20*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512 316 }, 317 { 318 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP", 319 "T4000*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512 320 }, 321 { 322 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP", 323 "HP-88780*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0 324 }, 325 { 326 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "KENNEDY", 327 "*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0 328 }, 329 { 330 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "M4 DATA", 331 "123107 SCSI*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0 332 }, 333 { /* jreynold@primenet.com */ 334 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "Seagate", 335 "STT8000N*", "*"}, SA_QUIRK_1FM, 0 336 }, 337 { /* mike@sentex.net */ 338 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "Seagate", 339 "STT20000*", "*"}, SA_QUIRK_1FM, 0 340 }, 341 { 342 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG", 343 " TDC 3600", "U07:"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512 344 }, 345 { 346 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG", 347 " TDC 3800", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512 348 }, 349 { 350 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG", 351 " TDC 4100", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512 352 }, 353 { 354 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG", 355 " TDC 4200", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512 356 }, 357 { 358 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG", 359 " SLR*", "*"}, SA_QUIRK_1FM, 0 360 }, 361 { 362 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "WANGTEK", 363 "5525ES*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512 364 }, 365 { 366 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "WANGTEK", 367 "51000*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 1024 368 } 369 }; 370 371 static d_open_t saopen; 372 static d_close_t saclose; 373 static d_strategy_t sastrategy; 374 static d_ioctl_t saioctl; 375 static periph_init_t sainit; 376 static periph_ctor_t saregister; 377 static periph_oninv_t saoninvalidate; 378 static periph_dtor_t sacleanup; 379 static periph_start_t sastart; 380 static void saasync(void *callback_arg, u_int32_t code, 381 struct cam_path *path, void *arg); 382 static void sadone(struct cam_periph *periph, 383 union ccb *start_ccb); 384 static int saerror(union ccb *ccb, u_int32_t cam_flags, 385 u_int32_t sense_flags); 386 static int samarkswanted(struct cam_periph *); 387 static int sacheckeod(struct cam_periph *periph); 388 static int sagetparams(struct cam_periph *periph, 389 sa_params params_to_get, 390 u_int32_t *blocksize, u_int8_t *density, 391 u_int32_t *numblocks, int *buff_mode, 392 u_int8_t *write_protect, u_int8_t *speed, 393 int *comp_supported, int *comp_enabled, 394 u_int32_t *comp_algorithm, 395 sa_comp_t *comp_page); 396 static int sasetparams(struct cam_periph *periph, 397 sa_params params_to_set, 398 u_int32_t blocksize, u_int8_t density, 399 u_int32_t comp_algorithm, 400 u_int32_t sense_flags); 401 static void saprevent(struct cam_periph *periph, int action); 402 static int sarewind(struct cam_periph *periph); 403 static int saspace(struct cam_periph *periph, int count, 404 scsi_space_code code); 405 static int samount(struct cam_periph *, int, cdev_t); 406 static int saretension(struct cam_periph *periph); 407 static int sareservereleaseunit(struct cam_periph *periph, 408 int reserve); 409 static int saloadunload(struct cam_periph *periph, int load); 410 static int saerase(struct cam_periph *periph, int longerase); 411 static int sawritefilemarks(struct cam_periph *periph, 412 int nmarks, int setmarks); 413 static int sardpos(struct cam_periph *periph, int, u_int32_t *); 414 static int sasetpos(struct cam_periph *periph, int, u_int32_t *); 415 416 417 static struct periph_driver sadriver = 418 { 419 sainit, "sa", 420 TAILQ_HEAD_INITIALIZER(sadriver.units), /* generation */ 0 421 }; 422 423 PERIPHDRIVER_DECLARE(sa, sadriver); 424 425 /* For 2.2-stable support */ 426 #ifndef D_TAPE 427 #define D_TAPE 0 428 #endif 429 430 #define SA_CDEV_MAJOR 14 431 432 static struct dev_ops sa_ops = { 433 { "sa", SA_CDEV_MAJOR, D_TAPE }, 434 .d_open = saopen, 435 .d_close = saclose, 436 .d_read = physread, 437 .d_write = physwrite, 438 .d_ioctl = saioctl, 439 .d_strategy = sastrategy, 440 }; 441 442 static struct extend_array *saperiphs; 443 444 static int 445 saopen(struct dev_open_args *ap) 446 { 447 cdev_t dev = ap->a_head.a_dev; 448 struct cam_periph *periph; 449 struct sa_softc *softc; 450 int unit; 451 int error; 452 453 unit = SAUNIT(dev); 454 455 periph = cam_extend_get(saperiphs, unit); 456 if (cam_periph_acquire(periph) != CAM_REQ_CMP) { 457 return (ENXIO); 458 } 459 460 cam_periph_lock(periph); 461 462 softc = (struct sa_softc *)periph->softc; 463 464 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE|CAM_DEBUG_INFO, 465 ("saopen(%d): dev=0x%x softc=0x%x\n", unit, unit, softc->flags)); 466 467 if (SA_IS_CTRL(dev)) { 468 softc->ctrl_mode = 1; 469 cam_periph_unlock(periph); 470 return (0); 471 } 472 473 if ((error = cam_periph_hold(periph, PCATCH)) != 0) { 474 cam_periph_unlock(periph); 475 cam_periph_release(periph); 476 return (error); 477 } 478 479 if (softc->flags & SA_FLAG_OPEN) { 480 error = EBUSY; 481 } else if (softc->flags & SA_FLAG_INVALID) { 482 error = ENXIO; 483 } else { 484 /* 485 * Preserve whether this is a read_only open. 486 */ 487 softc->open_rdonly = (ap->a_oflags & O_RDWR) == O_RDONLY; 488 489 /* 490 * The function samount ensures media is loaded and ready. 491 * It also does a device RESERVE if the tape isn't yet mounted. 492 * 493 * If the mount fails and this was a non-blocking open, 494 * make this a 'open_pending_mount' action. 495 */ 496 error = samount(periph, ap->a_oflags, dev); 497 if (error && (ap->a_oflags & O_NONBLOCK)) { 498 softc->flags |= SA_FLAG_OPEN; 499 softc->open_pending_mount = 1; 500 cam_periph_unhold(periph); 501 cam_periph_unlock(periph); 502 return (0); 503 } 504 } 505 506 if (error) { 507 cam_periph_unhold(periph); 508 cam_periph_unlock(periph); 509 cam_periph_release(periph); 510 return (error); 511 } 512 513 saprevent(periph, PR_PREVENT); 514 softc->flags |= SA_FLAG_OPEN; 515 516 cam_periph_unhold(periph); 517 cam_periph_unlock(periph); 518 return (error); 519 } 520 521 static int 522 saclose(struct dev_close_args *ap) 523 { 524 cdev_t dev = ap->a_head.a_dev; 525 struct cam_periph *periph; 526 struct sa_softc *softc; 527 int unit, mode, error, writing, tmp; 528 int closedbits = SA_FLAG_OPEN; 529 530 unit = SAUNIT(dev); 531 mode = SAMODE(dev); 532 periph = cam_extend_get(saperiphs, unit); 533 if (periph == NULL) 534 return (ENXIO); 535 536 cam_periph_lock(periph); 537 538 softc = (struct sa_softc *)periph->softc; 539 540 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE|CAM_DEBUG_INFO, 541 ("saclose(%d): dev=0x%x softc=0x%x\n", unit, unit, softc->flags)); 542 543 544 softc->open_rdonly = 0; 545 if (SA_IS_CTRL(dev)) { 546 softc->ctrl_mode = 0; 547 cam_periph_unlock(periph); 548 cam_periph_release(periph); 549 return (0); 550 } 551 552 if (softc->open_pending_mount) { 553 softc->flags &= ~SA_FLAG_OPEN; 554 softc->open_pending_mount = 0; 555 cam_periph_unlock(periph); 556 cam_periph_release(periph); 557 return (0); 558 } 559 560 if ((error = cam_periph_hold(periph, 0)) != 0) { 561 cam_periph_unlock(periph); 562 return (error); 563 } 564 565 /* 566 * Were we writing the tape? 567 */ 568 writing = (softc->flags & SA_FLAG_TAPE_WRITTEN) != 0; 569 570 /* 571 * See whether or not we need to write filemarks. If this 572 * fails, we probably have to assume we've lost tape 573 * position. 574 */ 575 error = sacheckeod(periph); 576 if (error) { 577 xpt_print(periph->path, 578 "failed to write terminating filemark(s)\n"); 579 softc->flags |= SA_FLAG_TAPE_FROZEN; 580 } 581 582 /* 583 * Whatever we end up doing, allow users to eject tapes from here on. 584 */ 585 saprevent(periph, PR_ALLOW); 586 587 /* 588 * Decide how to end... 589 */ 590 if ((softc->flags & SA_FLAG_TAPE_MOUNTED) == 0) { 591 closedbits |= SA_FLAG_TAPE_FROZEN; 592 } else switch (mode) { 593 case SA_MODE_OFFLINE: 594 /* 595 * An 'offline' close is an unconditional release of 596 * frozen && mount conditions, irrespective of whether 597 * these operations succeeded. The reason for this is 598 * to allow at least some kind of programmatic way 599 * around our state getting all fouled up. If somebody 600 * issues an 'offline' command, that will be allowed 601 * to clear state. 602 */ 603 sarewind(periph); 604 saloadunload(periph, FALSE); 605 closedbits |= SA_FLAG_TAPE_MOUNTED|SA_FLAG_TAPE_FROZEN; 606 break; 607 case SA_MODE_REWIND: 608 /* 609 * If the rewind fails, return an error- if anyone cares, 610 * but not overwriting any previous error. 611 * 612 * We don't clear the notion of mounted here, but we do 613 * clear the notion of frozen if we successfully rewound. 614 */ 615 tmp = sarewind(periph); 616 if (tmp) { 617 if (error != 0) 618 error = tmp; 619 } else { 620 closedbits |= SA_FLAG_TAPE_FROZEN; 621 } 622 break; 623 case SA_MODE_NOREWIND: 624 /* 625 * If we're not rewinding/unloading the tape, find out 626 * whether we need to back up over one of two filemarks 627 * we wrote (if we wrote two filemarks) so that appends 628 * from this point on will be sane. 629 */ 630 if (error == 0 && writing && (softc->quirks & SA_QUIRK_2FM)) { 631 tmp = saspace(periph, -1, SS_FILEMARKS); 632 if (tmp) { 633 xpt_print(periph->path, "unable to backspace " 634 "over one of double filemarks at end of " 635 "tape\n"); 636 xpt_print(periph->path, "it is possible that " 637 "this device needs a SA_QUIRK_1FM quirk set" 638 "for it\n"); 639 softc->flags |= SA_FLAG_TAPE_FROZEN; 640 } 641 } 642 break; 643 default: 644 xpt_print(periph->path, "unknown mode 0x%x in saclose\n", mode); 645 /* NOTREACHED */ 646 break; 647 } 648 649 /* 650 * We wish to note here that there are no more filemarks to be written. 651 */ 652 softc->filemarks = 0; 653 softc->flags &= ~SA_FLAG_TAPE_WRITTEN; 654 655 /* 656 * And we are no longer open for business. 657 */ 658 softc->flags &= ~closedbits; 659 660 /* 661 * Inform users if tape state if frozen.... 662 */ 663 if (softc->flags & SA_FLAG_TAPE_FROZEN) { 664 xpt_print(periph->path, "tape is now frozen- use an OFFLINE, " 665 "REWIND or MTEOM command to clear this state.\n"); 666 } 667 668 /* release the device if it is no longer mounted */ 669 if ((softc->flags & SA_FLAG_TAPE_MOUNTED) == 0) 670 sareservereleaseunit(periph, FALSE); 671 672 cam_periph_unhold(periph); 673 cam_periph_unlock(periph); 674 cam_periph_release(periph); 675 676 return (error); 677 } 678 679 /* 680 * Actually translate the requested transfer into one the physical driver 681 * can understand. The transfer is described by a buf and will include 682 * only one physical transfer. 683 */ 684 static int 685 sastrategy(struct dev_strategy_args *ap) 686 { 687 cdev_t dev = ap->a_head.a_dev; 688 struct bio *bio = ap->a_bio; 689 struct buf *bp = bio->bio_buf; 690 struct cam_periph *periph; 691 struct sa_softc *softc; 692 u_int unit; 693 694 if (SA_IS_CTRL(dev)) { 695 bp->b_error = EINVAL; 696 goto bad; 697 } 698 unit = SAUNIT(dev); 699 periph = cam_extend_get(saperiphs, unit); 700 if (periph == NULL) { 701 bp->b_error = ENXIO; 702 goto bad; 703 } 704 cam_periph_lock(periph); 705 706 softc = (struct sa_softc *)periph->softc; 707 708 if (softc->flags & SA_FLAG_INVALID) { 709 cam_periph_unlock(periph); 710 bp->b_error = ENXIO; 711 goto bad; 712 } 713 714 if (softc->flags & SA_FLAG_TAPE_FROZEN) { 715 cam_periph_unlock(periph); 716 bp->b_error = EPERM; 717 goto bad; 718 } 719 720 /* 721 * This should actually never occur as the write(2) 722 * system call traps attempts to write to a read-only 723 * file descriptor. 724 */ 725 if (bp->b_cmd == BUF_CMD_WRITE && softc->open_rdonly) { 726 cam_periph_unlock(periph); 727 bp->b_error = EBADF; 728 goto bad; 729 } 730 731 if (softc->open_pending_mount) { 732 int error = samount(periph, 0, dev); 733 if (error) { 734 cam_periph_unlock(periph); 735 bp->b_error = ENXIO; 736 goto bad; 737 } 738 saprevent(periph, PR_PREVENT); 739 softc->open_pending_mount = 0; 740 } 741 742 /* 743 * If it's a null transfer, return immediately 744 */ 745 if (bp->b_bcount == 0) { 746 cam_periph_unlock(periph); 747 goto done; 748 } 749 750 /* valid request? */ 751 if (softc->flags & SA_FLAG_FIXED) { 752 /* 753 * Fixed block device. The byte count must 754 * be a multiple of our block size. 755 */ 756 if (((softc->blk_mask != ~0) && 757 ((bp->b_bcount & softc->blk_mask) != 0)) || 758 ((softc->blk_mask == ~0) && 759 ((bp->b_bcount % softc->min_blk) != 0))) { 760 xpt_print(periph->path, "Invalid request. Fixed block " 761 "device requests must be a multiple of %d bytes\n", 762 softc->min_blk); 763 cam_periph_unlock(periph); 764 bp->b_error = EINVAL; 765 goto bad; 766 } 767 } else if ((bp->b_bcount > softc->max_blk) || 768 (bp->b_bcount < softc->min_blk) || 769 (bp->b_bcount & softc->blk_mask) != 0) { 770 771 xpt_print_path(periph->path); 772 kprintf("Invalid request. Variable block " 773 "device requests must be "); 774 if (softc->blk_mask != 0) { 775 kprintf("a multiple of %d ", (0x1 << softc->blk_gran)); 776 } 777 kprintf("between %d and %d bytes\n", softc->min_blk, 778 softc->max_blk); 779 cam_periph_unlock(periph); 780 bp->b_error = EINVAL; 781 goto bad; 782 } 783 784 /* 785 * Place it at the end of the queue. 786 */ 787 bioq_insert_tail(&softc->bio_queue, bio); 788 softc->queue_count++; 789 #if 0 790 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 791 ("sastrategy: queuing a %ld %s byte %s\n", bp->bio_bcount, 792 (softc->flags & SA_FLAG_FIXED)? "fixed" : "variable", 793 (bp->bio_cmd == BIO_READ)? "read" : "write")); 794 #endif 795 if (softc->queue_count > 1) { 796 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 797 ("sastrategy: queue count now %d\n", softc->queue_count)); 798 } 799 800 /* 801 * Schedule ourselves for performing the work. 802 */ 803 xpt_schedule(periph, 1); 804 cam_periph_unlock(periph); 805 806 return(0); 807 bad: 808 bp->b_flags |= B_ERROR; 809 done: 810 811 /* 812 * Correctly set the buf to indicate a completed xfer 813 */ 814 bp->b_resid = bp->b_bcount; 815 biodone(bio); 816 return(0); 817 } 818 819 820 #define PENDING_MOUNT_CHECK(softc, periph, dev) \ 821 if (softc->open_pending_mount) { \ 822 error = samount(periph, 0, dev); \ 823 if (error) { \ 824 break; \ 825 } \ 826 saprevent(periph, PR_PREVENT); \ 827 softc->open_pending_mount = 0; \ 828 } 829 830 static int 831 saioctl(struct dev_ioctl_args *ap) 832 { 833 cdev_t dev = ap->a_head.a_dev; 834 caddr_t addr = ap->a_data; 835 struct cam_periph *periph; 836 struct sa_softc *softc; 837 scsi_space_code spaceop; 838 int didlockperiph = 0; 839 int unit; 840 int mode; 841 int error = 0; 842 843 unit = SAUNIT(dev); 844 mode = SAMODE(dev); 845 error = 0; /* shut up gcc */ 846 spaceop = 0; /* shut up gcc */ 847 848 periph = cam_extend_get(saperiphs, unit); 849 if (periph == NULL) 850 return (ENXIO); 851 852 cam_periph_lock(periph); 853 softc = (struct sa_softc *)periph->softc; 854 855 /* 856 * Check for control mode accesses. We allow MTIOCGET and 857 * MTIOCERRSTAT (but need to be the only one open in order 858 * to clear latched status), and MTSETBSIZE, MTSETDNSTY 859 * and MTCOMP (but need to be the only one accessing this 860 * device to run those). 861 */ 862 863 if (SA_IS_CTRL(dev)) { 864 switch (ap->a_cmd) { 865 case MTIOCGETEOTMODEL: 866 case MTIOCGET: 867 break; 868 case MTIOCERRSTAT: 869 /* 870 * If the periph isn't already locked, lock it 871 * so our MTIOCERRSTAT can reset latched error stats. 872 * 873 * If the periph is already locked, skip it because 874 * we're just getting status and it'll be up to the 875 * other thread that has this device open to do 876 * an MTIOCERRSTAT that would clear latched status. 877 */ 878 if ((periph->flags & CAM_PERIPH_LOCKED) == 0) { 879 error = cam_periph_hold(periph, PCATCH); 880 if (error != 0) { 881 return (error); 882 } 883 didlockperiph = 1; 884 } 885 break; 886 887 case MTIOCTOP: 888 { 889 struct mtop *mt = (struct mtop *) addr; 890 891 /* 892 * Check to make sure it's an OP we can perform 893 * with no media inserted. 894 */ 895 switch (mt->mt_op) { 896 case MTSETBSIZ: 897 case MTSETDNSTY: 898 case MTCOMP: 899 mt = NULL; 900 /* FALLTHROUGH */ 901 default: 902 break; 903 } 904 if (mt != NULL) { 905 break; 906 } 907 /* FALLTHROUGH */ 908 } 909 case MTIOCSETEOTMODEL: 910 /* 911 * We need to acquire the peripheral here rather 912 * than at open time because we are sharing writable 913 * access to data structures. 914 */ 915 error = cam_periph_hold(periph, PCATCH); 916 if (error != 0) { 917 return (error); 918 } 919 didlockperiph = 1; 920 break; 921 922 default: 923 return (EINVAL); 924 } 925 } 926 927 /* 928 * Find the device that the user is talking about 929 */ 930 switch (ap->a_cmd) { 931 case MTIOCGET: 932 { 933 struct mtget *g = (struct mtget *)addr; 934 935 /* 936 * If this isn't the control mode device, actually go out 937 * and ask the drive again what it's set to. 938 */ 939 if (!SA_IS_CTRL(dev) && !softc->open_pending_mount) { 940 u_int8_t write_protect; 941 int comp_enabled, comp_supported; 942 error = sagetparams(periph, SA_PARAM_ALL, 943 &softc->media_blksize, &softc->media_density, 944 &softc->media_numblks, &softc->buffer_mode, 945 &write_protect, &softc->speed, &comp_supported, 946 &comp_enabled, &softc->comp_algorithm, NULL); 947 if (error) 948 break; 949 if (write_protect) 950 softc->flags |= SA_FLAG_TAPE_WP; 951 else 952 softc->flags &= ~SA_FLAG_TAPE_WP; 953 softc->flags &= ~(SA_FLAG_COMP_SUPP| 954 SA_FLAG_COMP_ENABLED|SA_FLAG_COMP_UNSUPP); 955 if (comp_supported) { 956 if (softc->saved_comp_algorithm == 0) 957 softc->saved_comp_algorithm = 958 softc->comp_algorithm; 959 softc->flags |= SA_FLAG_COMP_SUPP; 960 if (comp_enabled) 961 softc->flags |= SA_FLAG_COMP_ENABLED; 962 } else 963 softc->flags |= SA_FLAG_COMP_UNSUPP; 964 } 965 bzero(g, sizeof(struct mtget)); 966 g->mt_type = MT_ISAR; 967 if (softc->flags & SA_FLAG_COMP_UNSUPP) { 968 g->mt_comp = MT_COMP_UNSUPP; 969 g->mt_comp0 = MT_COMP_UNSUPP; 970 g->mt_comp1 = MT_COMP_UNSUPP; 971 g->mt_comp2 = MT_COMP_UNSUPP; 972 g->mt_comp3 = MT_COMP_UNSUPP; 973 } else { 974 if ((softc->flags & SA_FLAG_COMP_ENABLED) == 0) { 975 g->mt_comp = MT_COMP_DISABLED; 976 } else { 977 g->mt_comp = softc->comp_algorithm; 978 } 979 g->mt_comp0 = softc->comp_algorithm; 980 g->mt_comp1 = softc->comp_algorithm; 981 g->mt_comp2 = softc->comp_algorithm; 982 g->mt_comp3 = softc->comp_algorithm; 983 } 984 g->mt_density = softc->media_density; 985 g->mt_density0 = softc->media_density; 986 g->mt_density1 = softc->media_density; 987 g->mt_density2 = softc->media_density; 988 g->mt_density3 = softc->media_density; 989 g->mt_blksiz = softc->media_blksize; 990 g->mt_blksiz0 = softc->media_blksize; 991 g->mt_blksiz1 = softc->media_blksize; 992 g->mt_blksiz2 = softc->media_blksize; 993 g->mt_blksiz3 = softc->media_blksize; 994 g->mt_fileno = softc->fileno; 995 g->mt_blkno = softc->blkno; 996 g->mt_dsreg = (short) softc->dsreg; 997 /* 998 * Yes, we know that this is likely to overflow 999 */ 1000 if (softc->last_resid_was_io) { 1001 if ((g->mt_resid = (short) softc->last_io_resid) != 0) { 1002 if (SA_IS_CTRL(dev) == 0 || didlockperiph) { 1003 softc->last_io_resid = 0; 1004 } 1005 } 1006 } else { 1007 if ((g->mt_resid = (short)softc->last_ctl_resid) != 0) { 1008 if (SA_IS_CTRL(dev) == 0 || didlockperiph) { 1009 softc->last_ctl_resid = 0; 1010 } 1011 } 1012 } 1013 error = 0; 1014 break; 1015 } 1016 case MTIOCERRSTAT: 1017 { 1018 struct scsi_tape_errors *sep = 1019 &((union mterrstat *)addr)->scsi_errstat; 1020 1021 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, 1022 ("saioctl: MTIOCERRSTAT\n")); 1023 1024 bzero(sep, sizeof(*sep)); 1025 sep->io_resid = softc->last_io_resid; 1026 bcopy((caddr_t) &softc->last_io_sense, sep->io_sense, 1027 sizeof (sep->io_sense)); 1028 bcopy((caddr_t) &softc->last_io_cdb, sep->io_cdb, 1029 sizeof (sep->io_cdb)); 1030 sep->ctl_resid = softc->last_ctl_resid; 1031 bcopy((caddr_t) &softc->last_ctl_sense, sep->ctl_sense, 1032 sizeof (sep->ctl_sense)); 1033 bcopy((caddr_t) &softc->last_ctl_cdb, sep->ctl_cdb, 1034 sizeof (sep->ctl_cdb)); 1035 1036 if ((SA_IS_CTRL(dev) == 0 && softc->open_pending_mount) || 1037 didlockperiph) 1038 bzero((caddr_t) &softc->errinfo, 1039 sizeof (softc->errinfo)); 1040 error = 0; 1041 break; 1042 } 1043 case MTIOCTOP: 1044 { 1045 struct mtop *mt; 1046 int count; 1047 1048 PENDING_MOUNT_CHECK(softc, periph, dev); 1049 1050 mt = (struct mtop *)addr; 1051 1052 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, 1053 ("saioctl: op=0x%x count=0x%x\n", 1054 mt->mt_op, mt->mt_count)); 1055 1056 count = mt->mt_count; 1057 switch (mt->mt_op) { 1058 case MTWEOF: /* write an end-of-file marker */ 1059 /* 1060 * We don't need to clear the SA_FLAG_TAPE_WRITTEN 1061 * flag because by keeping track of filemarks 1062 * we have last written we know ehether or not 1063 * we need to write more when we close the device. 1064 */ 1065 error = sawritefilemarks(periph, count, FALSE); 1066 break; 1067 case MTWSS: /* write a setmark */ 1068 error = sawritefilemarks(periph, count, TRUE); 1069 break; 1070 case MTBSR: /* backward space record */ 1071 case MTFSR: /* forward space record */ 1072 case MTBSF: /* backward space file */ 1073 case MTFSF: /* forward space file */ 1074 case MTBSS: /* backward space setmark */ 1075 case MTFSS: /* forward space setmark */ 1076 case MTEOD: /* space to end of recorded medium */ 1077 { 1078 int nmarks; 1079 1080 spaceop = SS_FILEMARKS; 1081 nmarks = softc->filemarks; 1082 error = sacheckeod(periph); 1083 if (error) { 1084 xpt_print(periph->path, 1085 "EOD check prior to spacing failed\n"); 1086 softc->flags |= SA_FLAG_EIO_PENDING; 1087 break; 1088 } 1089 nmarks -= softc->filemarks; 1090 switch(mt->mt_op) { 1091 case MTBSR: 1092 count = -count; 1093 /* FALLTHROUGH */ 1094 case MTFSR: 1095 spaceop = SS_BLOCKS; 1096 break; 1097 case MTBSF: 1098 count = -count; 1099 /* FALLTHROUGH */ 1100 case MTFSF: 1101 break; 1102 case MTBSS: 1103 count = -count; 1104 /* FALLTHROUGH */ 1105 case MTFSS: 1106 spaceop = SS_SETMARKS; 1107 break; 1108 case MTEOD: 1109 spaceop = SS_EOD; 1110 count = 0; 1111 nmarks = 0; 1112 break; 1113 default: 1114 error = EINVAL; 1115 break; 1116 } 1117 if (error) 1118 break; 1119 1120 nmarks = softc->filemarks; 1121 /* 1122 * XXX: Why are we checking again? 1123 */ 1124 error = sacheckeod(periph); 1125 if (error) 1126 break; 1127 nmarks -= softc->filemarks; 1128 error = saspace(periph, count - nmarks, spaceop); 1129 /* 1130 * At this point, clear that we've written the tape 1131 * and that we've written any filemarks. We really 1132 * don't know what the applications wishes to do next- 1133 * the sacheckeod's will make sure we terminated the 1134 * tape correctly if we'd been writing, but the next 1135 * action the user application takes will set again 1136 * whether we need to write filemarks. 1137 */ 1138 softc->flags &= 1139 ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN); 1140 softc->filemarks = 0; 1141 break; 1142 } 1143 case MTREW: /* rewind */ 1144 PENDING_MOUNT_CHECK(softc, periph, dev); 1145 sacheckeod(periph); 1146 error = sarewind(periph); 1147 /* see above */ 1148 softc->flags &= 1149 ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN); 1150 softc->flags &= ~SA_FLAG_ERR_PENDING; 1151 softc->filemarks = 0; 1152 break; 1153 case MTERASE: /* erase */ 1154 PENDING_MOUNT_CHECK(softc, periph, dev); 1155 error = saerase(periph, count); 1156 softc->flags &= 1157 ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN); 1158 softc->flags &= ~SA_FLAG_ERR_PENDING; 1159 break; 1160 case MTRETENS: /* re-tension tape */ 1161 PENDING_MOUNT_CHECK(softc, periph, dev); 1162 error = saretension(periph); 1163 softc->flags &= 1164 ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN); 1165 softc->flags &= ~SA_FLAG_ERR_PENDING; 1166 break; 1167 case MTOFFL: /* rewind and put the drive offline */ 1168 1169 PENDING_MOUNT_CHECK(softc, periph, dev); 1170 1171 sacheckeod(periph); 1172 /* see above */ 1173 softc->flags &= ~SA_FLAG_TAPE_WRITTEN; 1174 softc->filemarks = 0; 1175 1176 error = sarewind(periph); 1177 /* clear the frozen flag anyway */ 1178 softc->flags &= ~SA_FLAG_TAPE_FROZEN; 1179 1180 /* 1181 * Be sure to allow media removal before ejecting. 1182 */ 1183 1184 saprevent(periph, PR_ALLOW); 1185 if (error == 0) { 1186 error = saloadunload(periph, FALSE); 1187 if (error == 0) { 1188 softc->flags &= ~SA_FLAG_TAPE_MOUNTED; 1189 } 1190 } 1191 break; 1192 1193 case MTNOP: /* no operation, sets status only */ 1194 case MTCACHE: /* enable controller cache */ 1195 case MTNOCACHE: /* disable controller cache */ 1196 error = 0; 1197 break; 1198 1199 case MTSETBSIZ: /* Set block size for device */ 1200 1201 PENDING_MOUNT_CHECK(softc, periph, dev); 1202 1203 error = sasetparams(periph, SA_PARAM_BLOCKSIZE, count, 1204 0, 0, 0); 1205 if (error == 0) { 1206 softc->last_media_blksize = 1207 softc->media_blksize; 1208 softc->media_blksize = count; 1209 if (count) { 1210 softc->flags |= SA_FLAG_FIXED; 1211 if (powerof2(count)) { 1212 softc->blk_shift = 1213 ffs(count) - 1; 1214 softc->blk_mask = count - 1; 1215 } else { 1216 softc->blk_mask = ~0; 1217 softc->blk_shift = 0; 1218 } 1219 /* 1220 * Make the user's desire 'persistent'. 1221 */ 1222 softc->quirks &= ~SA_QUIRK_VARIABLE; 1223 softc->quirks |= SA_QUIRK_FIXED; 1224 } else { 1225 softc->flags &= ~SA_FLAG_FIXED; 1226 if (softc->max_blk == 0) { 1227 softc->max_blk = ~0; 1228 } 1229 softc->blk_shift = 0; 1230 if (softc->blk_gran != 0) { 1231 softc->blk_mask = 1232 softc->blk_gran - 1; 1233 } else { 1234 softc->blk_mask = 0; 1235 } 1236 /* 1237 * Make the user's desire 'persistent'. 1238 */ 1239 softc->quirks |= SA_QUIRK_VARIABLE; 1240 softc->quirks &= ~SA_QUIRK_FIXED; 1241 } 1242 } 1243 break; 1244 case MTSETDNSTY: /* Set density for device and mode */ 1245 PENDING_MOUNT_CHECK(softc, periph, dev); 1246 1247 if (count > UCHAR_MAX) { 1248 error = EINVAL; 1249 break; 1250 } else { 1251 error = sasetparams(periph, SA_PARAM_DENSITY, 1252 0, count, 0, 0); 1253 } 1254 break; 1255 case MTCOMP: /* enable compression */ 1256 PENDING_MOUNT_CHECK(softc, periph, dev); 1257 /* 1258 * Some devices don't support compression, and 1259 * don't like it if you ask them for the 1260 * compression page. 1261 */ 1262 if ((softc->quirks & SA_QUIRK_NOCOMP) || 1263 (softc->flags & SA_FLAG_COMP_UNSUPP)) { 1264 error = ENODEV; 1265 break; 1266 } 1267 error = sasetparams(periph, SA_PARAM_COMPRESSION, 1268 0, 0, count, SF_NO_PRINT); 1269 break; 1270 default: 1271 error = EINVAL; 1272 } 1273 break; 1274 } 1275 case MTIOCIEOT: 1276 case MTIOCEEOT: 1277 error = 0; 1278 break; 1279 case MTIOCRDSPOS: 1280 PENDING_MOUNT_CHECK(softc, periph, dev); 1281 error = sardpos(periph, 0, (u_int32_t *) addr); 1282 break; 1283 case MTIOCRDHPOS: 1284 PENDING_MOUNT_CHECK(softc, periph, dev); 1285 error = sardpos(periph, 1, (u_int32_t *) addr); 1286 break; 1287 case MTIOCSLOCATE: 1288 PENDING_MOUNT_CHECK(softc, periph, dev); 1289 error = sasetpos(periph, 0, (u_int32_t *) addr); 1290 break; 1291 case MTIOCHLOCATE: 1292 PENDING_MOUNT_CHECK(softc, periph, dev); 1293 error = sasetpos(periph, 1, (u_int32_t *) addr); 1294 break; 1295 case MTIOCGETEOTMODEL: 1296 error = 0; 1297 if (softc->quirks & SA_QUIRK_1FM) 1298 mode = 1; 1299 else 1300 mode = 2; 1301 *((u_int32_t *) addr) = mode; 1302 break; 1303 case MTIOCSETEOTMODEL: 1304 error = 0; 1305 switch (*((u_int32_t *) addr)) { 1306 case 1: 1307 softc->quirks &= ~SA_QUIRK_2FM; 1308 softc->quirks |= SA_QUIRK_1FM; 1309 break; 1310 case 2: 1311 softc->quirks &= ~SA_QUIRK_1FM; 1312 softc->quirks |= SA_QUIRK_2FM; 1313 break; 1314 default: 1315 error = EINVAL; 1316 break; 1317 } 1318 break; 1319 default: 1320 error = cam_periph_ioctl(periph, ap->a_cmd, addr, saerror); 1321 break; 1322 } 1323 1324 /* 1325 * Check to see if we cleared a frozen state 1326 */ 1327 if (error == 0 && (softc->flags & SA_FLAG_TAPE_FROZEN)) { 1328 switch(ap->a_cmd) { 1329 case MTIOCRDSPOS: 1330 case MTIOCRDHPOS: 1331 case MTIOCSLOCATE: 1332 case MTIOCHLOCATE: 1333 softc->fileno = (daddr_t) -1; 1334 softc->blkno = (daddr_t) -1; 1335 softc->flags &= ~SA_FLAG_TAPE_FROZEN; 1336 xpt_print(periph->path, 1337 "tape state now unfrozen.\n"); 1338 break; 1339 default: 1340 break; 1341 } 1342 } 1343 if (didlockperiph) { 1344 cam_periph_unhold(periph); 1345 } 1346 cam_periph_unlock(periph); 1347 return (error); 1348 } 1349 1350 static void 1351 sainit(void) 1352 { 1353 cam_status status; 1354 1355 /* 1356 * Create our extend array for storing the devices we attach to. 1357 */ 1358 saperiphs = cam_extend_new(); 1359 if (saperiphs == NULL) { 1360 kprintf("sa: Failed to alloc extend array!\n"); 1361 return; 1362 } 1363 1364 /* 1365 * Install a global async callback. 1366 */ 1367 status = xpt_register_async(AC_FOUND_DEVICE, saasync, NULL, NULL); 1368 1369 if (status != CAM_REQ_CMP) { 1370 kprintf("sa: Failed to attach master async callback " 1371 "due to status 0x%x!\n", status); 1372 } 1373 } 1374 1375 static void 1376 saoninvalidate(struct cam_periph *periph) 1377 { 1378 struct sa_softc *softc; 1379 struct buf *q_bp; 1380 struct bio *q_bio; 1381 1382 softc = (struct sa_softc *)periph->softc; 1383 1384 /* 1385 * De-register any async callbacks. 1386 */ 1387 xpt_register_async(0, saasync, periph, periph->path); 1388 1389 softc->flags |= SA_FLAG_INVALID; 1390 1391 /* 1392 * Return all queued I/O with ENXIO. 1393 * XXX Handle any transactions queued to the card 1394 * with XPT_ABORT_CCB. 1395 */ 1396 while ((q_bio = bioq_first(&softc->bio_queue)) != NULL){ 1397 bioq_remove(&softc->bio_queue, q_bio); 1398 q_bp = q_bio->bio_buf; 1399 q_bp->b_resid = q_bp->b_bcount; 1400 q_bp->b_error = ENXIO; 1401 q_bp->b_flags |= B_ERROR; 1402 biodone(q_bio); 1403 } 1404 softc->queue_count = 0; 1405 1406 xpt_print(periph->path, "lost device\n"); 1407 1408 } 1409 1410 static void 1411 sacleanup(struct cam_periph *periph) 1412 { 1413 struct sa_softc *softc; 1414 1415 softc = (struct sa_softc *)periph->softc; 1416 1417 devstat_remove_entry(&softc->device_stats); 1418 1419 cam_extend_release(saperiphs, periph->unit_number); 1420 xpt_print(periph->path, "removing device entry\n"); 1421 dev_ops_remove(&sa_ops, SA_UNITMASK, SA_UNIT(periph->unit_number)); 1422 kfree(softc, M_SCSISA); 1423 } 1424 1425 static void 1426 saasync(void *callback_arg, u_int32_t code, 1427 struct cam_path *path, void *arg) 1428 { 1429 struct cam_periph *periph; 1430 1431 periph = (struct cam_periph *)callback_arg; 1432 switch (code) { 1433 case AC_FOUND_DEVICE: 1434 { 1435 struct ccb_getdev *cgd; 1436 cam_status status; 1437 1438 cgd = (struct ccb_getdev *)arg; 1439 if (cgd == NULL) 1440 break; 1441 1442 if (SID_TYPE(&cgd->inq_data) != T_SEQUENTIAL) 1443 break; 1444 1445 /* 1446 * Allocate a peripheral instance for 1447 * this device and start the probe 1448 * process. 1449 */ 1450 status = cam_periph_alloc(saregister, saoninvalidate, 1451 sacleanup, sastart, 1452 "sa", CAM_PERIPH_BIO, cgd->ccb_h.path, 1453 saasync, AC_FOUND_DEVICE, cgd); 1454 1455 if (status != CAM_REQ_CMP 1456 && status != CAM_REQ_INPROG) 1457 kprintf("saasync: Unable to probe new device " 1458 "due to status 0x%x\n", status); 1459 break; 1460 } 1461 default: 1462 cam_periph_async(periph, code, path, arg); 1463 break; 1464 } 1465 } 1466 1467 static cam_status 1468 saregister(struct cam_periph *periph, void *arg) 1469 { 1470 struct sa_softc *softc; 1471 struct ccb_getdev *cgd; 1472 caddr_t match; 1473 int i; 1474 1475 cgd = (struct ccb_getdev *)arg; 1476 if (periph == NULL) { 1477 kprintf("saregister: periph was NULL!!\n"); 1478 return (CAM_REQ_CMP_ERR); 1479 } 1480 1481 if (cgd == NULL) { 1482 kprintf("saregister: no getdev CCB, can't register device\n"); 1483 return (CAM_REQ_CMP_ERR); 1484 } 1485 1486 softc = kmalloc(sizeof (*softc), M_SCSISA, M_INTWAIT | M_ZERO); 1487 softc->scsi_rev = SID_ANSI_REV(&cgd->inq_data); 1488 softc->state = SA_STATE_NORMAL; 1489 softc->fileno = (daddr_t) -1; 1490 softc->blkno = (daddr_t) -1; 1491 1492 bioq_init(&softc->bio_queue); 1493 periph->softc = softc; 1494 cam_extend_set(saperiphs, periph->unit_number, periph); 1495 1496 /* 1497 * See if this device has any quirks. 1498 */ 1499 match = cam_quirkmatch((caddr_t)&cgd->inq_data, 1500 (caddr_t)sa_quirk_table, 1501 sizeof(sa_quirk_table)/sizeof(*sa_quirk_table), 1502 sizeof(*sa_quirk_table), scsi_inquiry_match); 1503 1504 if (match != NULL) { 1505 softc->quirks = ((struct sa_quirk_entry *)match)->quirks; 1506 softc->last_media_blksize = 1507 ((struct sa_quirk_entry *)match)->prefblk; 1508 #ifdef CAMDEBUG 1509 xpt_print(periph->path, "found quirk entry %d\n", 1510 (int) (((struct sa_quirk_entry *) match) - sa_quirk_table)); 1511 #endif 1512 } else 1513 softc->quirks = SA_QUIRK_NONE; 1514 1515 /* 1516 * The SA driver supports a blocksize, but we don't know the 1517 * blocksize until we media is inserted. So, set a flag to 1518 * indicate that the blocksize is unavailable right now. 1519 */ 1520 cam_periph_unlock(periph); 1521 devstat_add_entry(&softc->device_stats, "sa", periph->unit_number, 0, 1522 DEVSTAT_BS_UNAVAILABLE, SID_TYPE(&cgd->inq_data) | 1523 DEVSTAT_TYPE_IF_SCSI, DEVSTAT_PRIORITY_TAPE); 1524 1525 dev_ops_add(&sa_ops, SA_UNITMASK, SA_UNIT(periph->unit_number)); 1526 make_dev(&sa_ops, SAMINOR(SA_CTLDEV, 1527 periph->unit_number, 0, SA_ATYPE_R), UID_ROOT, GID_OPERATOR, 1528 0660, "%s%d.ctl", periph->periph_name, periph->unit_number); 1529 1530 make_dev(&sa_ops, SAMINOR(SA_NOT_CTLDEV, 1531 periph->unit_number, 0, SA_ATYPE_R), UID_ROOT, GID_OPERATOR, 1532 0660, "%s%d", periph->periph_name, periph->unit_number); 1533 1534 make_dev(&sa_ops, SAMINOR(SA_NOT_CTLDEV, 1535 periph->unit_number, 0, SA_ATYPE_NR), UID_ROOT, GID_OPERATOR, 1536 0660, "n%s%d", periph->periph_name, periph->unit_number); 1537 1538 make_dev(&sa_ops, SAMINOR(SA_NOT_CTLDEV, 1539 periph->unit_number, 0, SA_ATYPE_ER), UID_ROOT, GID_OPERATOR, 1540 0660, "e%s%d", periph->periph_name, periph->unit_number); 1541 1542 for (i = 0; i < SA_NUM_MODES; i++) { 1543 1544 make_dev(&sa_ops, 1545 SAMINOR(SA_NOT_CTLDEV, periph->unit_number, i, SA_ATYPE_R), 1546 UID_ROOT, GID_OPERATOR, 0660, "%s%d.%d", 1547 periph->periph_name, periph->unit_number, i); 1548 1549 make_dev(&sa_ops, 1550 SAMINOR(SA_NOT_CTLDEV, periph->unit_number, i, SA_ATYPE_NR), 1551 UID_ROOT, GID_OPERATOR, 0660, "n%s%d.%d", 1552 periph->periph_name, periph->unit_number, i); 1553 1554 1555 make_dev(&sa_ops, 1556 SAMINOR(SA_NOT_CTLDEV, periph->unit_number, i, SA_ATYPE_ER), 1557 UID_ROOT, GID_OPERATOR, 0660, "e%s%d.%d", 1558 periph->periph_name, periph->unit_number, i); 1559 } 1560 cam_periph_lock(periph); 1561 1562 /* 1563 * Add an async callback so that we get 1564 * notified if this device goes away. 1565 */ 1566 xpt_register_async(AC_LOST_DEVICE, saasync, periph, periph->path); 1567 1568 xpt_announce_periph(periph, NULL); 1569 1570 return (CAM_REQ_CMP); 1571 } 1572 1573 static void 1574 sastart(struct cam_periph *periph, union ccb *start_ccb) 1575 { 1576 struct sa_softc *softc; 1577 1578 softc = (struct sa_softc *)periph->softc; 1579 1580 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("sastart\n")); 1581 1582 1583 switch (softc->state) { 1584 case SA_STATE_NORMAL: 1585 { 1586 /* Pull a buffer from the queue and get going on it */ 1587 struct buf *bp; 1588 struct bio *bio; 1589 1590 /* 1591 * See if there is a buf with work for us to do.. 1592 */ 1593 bio = bioq_first(&softc->bio_queue); 1594 if (periph->immediate_priority <= periph->pinfo.priority) { 1595 CAM_DEBUG_PRINT(CAM_DEBUG_SUBTRACE, 1596 ("queuing for immediate ccb\n")); 1597 Set_CCB_Type(start_ccb, SA_CCB_WAITING); 1598 SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h, 1599 periph_links.sle); 1600 periph->immediate_priority = CAM_PRIORITY_NONE; 1601 wakeup(&periph->ccb_list); 1602 } else if (bio == NULL) { 1603 xpt_release_ccb(start_ccb); 1604 } else if ((softc->flags & SA_FLAG_ERR_PENDING) != 0) { 1605 struct bio *done_bio; 1606 again: 1607 softc->queue_count--; 1608 bioq_remove(&softc->bio_queue, bio); 1609 bp = bio->bio_buf; 1610 bp->b_resid = bp->b_bcount; 1611 done_bio = bio; 1612 if ((softc->flags & SA_FLAG_EOM_PENDING) != 0) { 1613 /* 1614 * We now just clear errors in this case 1615 * and let the residual be the notifier. 1616 */ 1617 bp->b_error = 0; 1618 } else if ((softc->flags & SA_FLAG_EOF_PENDING) != 0) { 1619 /* 1620 * This can only happen if we're reading 1621 * in fixed length mode. In this case, 1622 * we dump the rest of the list the 1623 * same way. 1624 */ 1625 bp->b_error = 0; 1626 if (bioq_first(&softc->bio_queue) != NULL) { 1627 biodone(done_bio); 1628 goto again; 1629 } 1630 } else if ((softc->flags & SA_FLAG_EIO_PENDING) != 0) { 1631 bp->b_error = EIO; 1632 bp->b_flags |= B_ERROR; 1633 } 1634 bio = bioq_first(&softc->bio_queue); 1635 /* 1636 * Only if we have no other buffers queued up 1637 * do we clear the pending error flag. 1638 */ 1639 if (bio == NULL) 1640 softc->flags &= ~SA_FLAG_ERR_PENDING; 1641 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 1642 ("sastart- ERR_PENDING now 0x%x, bio is %sNULL, " 1643 "%d more buffers queued up\n", 1644 (softc->flags & SA_FLAG_ERR_PENDING), 1645 (bio != NULL)? "not " : " ", softc->queue_count)); 1646 xpt_release_ccb(start_ccb); 1647 biodone(done_bio); 1648 } else { 1649 u_int32_t length; 1650 1651 bioq_remove(&softc->bio_queue, bio); 1652 bp = bio->bio_buf; 1653 softc->queue_count--; 1654 1655 if ((softc->flags & SA_FLAG_FIXED) != 0) { 1656 if (softc->blk_shift != 0) { 1657 length = 1658 bp->b_bcount >> softc->blk_shift; 1659 } else if (softc->media_blksize != 0) { 1660 length = 1661 bp->b_bcount / softc->media_blksize; 1662 } else { 1663 bp->b_error = EIO; 1664 xpt_print(periph->path, "zero blocksize" 1665 " for FIXED length writes?\n"); 1666 biodone(bio); 1667 break; 1668 } 1669 #if 0 1670 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_INFO, 1671 ("issuing a %d fixed record %s\n", 1672 length, (bp->bio_cmd == BIO_READ)? "read" : 1673 "write")); 1674 #endif 1675 } else { 1676 length = bp->b_bcount; 1677 #if 0 1678 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_INFO, 1679 ("issuing a %d variable byte %s\n", 1680 length, (bp->bio_cmd == BIO_READ)? "read" : 1681 "write")); 1682 #endif 1683 } 1684 devstat_start_transaction(&softc->device_stats); 1685 /* 1686 * Some people have theorized that we should 1687 * suppress illegal length indication if we are 1688 * running in variable block mode so that we don't 1689 * have to request sense every time our requested 1690 * block size is larger than the written block. 1691 * The residual information from the ccb allows 1692 * us to identify this situation anyway. The only 1693 * problem with this is that we will not get 1694 * information about blocks that are larger than 1695 * our read buffer unless we set the block size 1696 * in the mode page to something other than 0. 1697 * 1698 * I believe that this is a non-issue. If user apps 1699 * don't adjust their read size to match our record 1700 * size, that's just life. Anyway, the typical usage 1701 * would be to issue, e.g., 64KB reads and occasionally 1702 * have to do deal with 512 byte or 1KB intermediate 1703 * records. 1704 */ 1705 softc->dsreg = (bp->b_cmd == BUF_CMD_READ) ? 1706 MTIO_DSREG_RD : MTIO_DSREG_WR; 1707 scsi_sa_read_write(&start_ccb->csio, 0, sadone, 1708 MSG_SIMPLE_Q_TAG, (bp->b_cmd == BUF_CMD_READ) != 0, 1709 FALSE, (softc->flags & SA_FLAG_FIXED) != 0, 1710 length, bp->b_data, bp->b_bcount, SSD_FULL_SIZE, 1711 IO_TIMEOUT); 1712 start_ccb->ccb_h.ccb_pflags &= ~SA_POSITION_UPDATED; 1713 Set_CCB_Type(start_ccb, SA_CCB_BUFFER_IO); 1714 start_ccb->ccb_h.ccb_bio = bio; 1715 bio = bioq_first(&softc->bio_queue); 1716 xpt_action(start_ccb); 1717 } 1718 1719 if (bio != NULL) { 1720 /* Have more work to do, so ensure we stay scheduled */ 1721 xpt_schedule(periph, 1); 1722 } 1723 break; 1724 } 1725 case SA_STATE_ABNORMAL: 1726 default: 1727 panic("state 0x%x in sastart", softc->state); 1728 break; 1729 } 1730 } 1731 1732 1733 static void 1734 sadone(struct cam_periph *periph, union ccb *done_ccb) 1735 { 1736 struct sa_softc *softc; 1737 struct ccb_scsiio *csio; 1738 1739 softc = (struct sa_softc *)periph->softc; 1740 csio = &done_ccb->csio; 1741 switch (CCB_Type(csio)) { 1742 case SA_CCB_BUFFER_IO: 1743 { 1744 struct buf *bp; 1745 struct bio *bio; 1746 int error; 1747 1748 softc->dsreg = MTIO_DSREG_REST; 1749 bio = (struct bio *)done_ccb->ccb_h.ccb_bio; 1750 bp = bio->bio_buf; 1751 error = 0; 1752 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 1753 if ((error = saerror(done_ccb, 0, 0)) == ERESTART) { 1754 /* 1755 * A retry was scheduled, so just return. 1756 */ 1757 return; 1758 } 1759 } 1760 1761 if (error == EIO) { 1762 struct buf *q_bp; 1763 struct bio *q_bio; 1764 1765 /* 1766 * Catastrophic error. Mark the tape as frozen 1767 * (we no longer know tape position). 1768 * 1769 * Return all queued I/O with EIO, and unfreeze 1770 * our queue so that future transactions that 1771 * attempt to fix this problem can get to the 1772 * device. 1773 * 1774 */ 1775 1776 softc->flags |= SA_FLAG_TAPE_FROZEN; 1777 while ((q_bio = bioq_first(&softc->bio_queue)) != NULL) { 1778 bioq_remove(&softc->bio_queue, q_bio); 1779 q_bp = q_bio->bio_buf; 1780 q_bp->b_resid = q_bp->b_bcount; 1781 q_bp->b_error = EIO; 1782 q_bp->b_flags |= B_ERROR; 1783 biodone(q_bio); 1784 } 1785 } 1786 if (error != 0) { 1787 bp->b_resid = bp->b_bcount; 1788 bp->b_error = error; 1789 bp->b_flags |= B_ERROR; 1790 /* 1791 * In the error case, position is updated in saerror. 1792 */ 1793 } else { 1794 bp->b_resid = csio->resid; 1795 bp->b_error = 0; 1796 if (csio->resid != 0) { 1797 bp->b_flags |= B_ERROR; 1798 } 1799 if (bp->b_cmd != BUF_CMD_READ) { 1800 softc->flags |= SA_FLAG_TAPE_WRITTEN; 1801 softc->filemarks = 0; 1802 } 1803 if (!(csio->ccb_h.ccb_pflags & SA_POSITION_UPDATED) && 1804 (softc->blkno != (daddr_t) -1)) { 1805 if ((softc->flags & SA_FLAG_FIXED) != 0) { 1806 u_int32_t l; 1807 if (softc->blk_shift != 0) { 1808 l = bp->b_bcount >> 1809 softc->blk_shift; 1810 } else { 1811 l = bp->b_bcount / 1812 softc->media_blksize; 1813 } 1814 softc->blkno += (daddr_t) l; 1815 } else { 1816 softc->blkno++; 1817 } 1818 } 1819 } 1820 /* 1821 * If we had an error (immediate or pending), 1822 * release the device queue now. 1823 */ 1824 if (error || (softc->flags & SA_FLAG_ERR_PENDING)) 1825 cam_release_devq(done_ccb->ccb_h.path, 0, 0, 0, 0); 1826 #ifdef CAMDEBUG 1827 if (error || bp->b_resid) { 1828 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 1829 ("error %d resid %d count %d\n", error, 1830 bp->b_resid, bp->b_bcount)); 1831 } 1832 #endif 1833 devstat_end_transaction_buf(&softc->device_stats, bp); 1834 biodone(bio); 1835 break; 1836 } 1837 case SA_CCB_WAITING: 1838 { 1839 /* Caller will release the CCB */ 1840 wakeup(&done_ccb->ccb_h.cbfcnp); 1841 return; 1842 } 1843 } 1844 xpt_release_ccb(done_ccb); 1845 } 1846 1847 /* 1848 * Mount the tape (make sure it's ready for I/O). 1849 */ 1850 static int 1851 samount(struct cam_periph *periph, int oflags, cdev_t dev) 1852 { 1853 struct sa_softc *softc; 1854 union ccb *ccb; 1855 int error; 1856 1857 /* 1858 * oflags can be checked for 'kind' of open (read-only check) - later 1859 * dev can be checked for a control-mode or compression open - later 1860 */ 1861 UNUSED_PARAMETER(oflags); 1862 UNUSED_PARAMETER(dev); 1863 1864 1865 softc = (struct sa_softc *)periph->softc; 1866 1867 /* 1868 * This should determine if something has happend since the last 1869 * open/mount that would invalidate the mount. We do *not* want 1870 * to retry this command- we just want the status. But we only 1871 * do this if we're mounted already- if we're not mounted, 1872 * we don't care about the unit read state and can instead use 1873 * this opportunity to attempt to reserve the tape unit. 1874 */ 1875 1876 if (softc->flags & SA_FLAG_TAPE_MOUNTED) { 1877 ccb = cam_periph_getccb(periph, 1); 1878 scsi_test_unit_ready(&ccb->csio, 0, sadone, 1879 MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT); 1880 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT, 1881 &softc->device_stats); 1882 QFRLS(ccb); 1883 if (error == ENXIO) { 1884 softc->flags &= ~SA_FLAG_TAPE_MOUNTED; 1885 scsi_test_unit_ready(&ccb->csio, 0, sadone, 1886 MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT); 1887 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT, 1888 &softc->device_stats); 1889 QFRLS(ccb); 1890 } else if (error) { 1891 /* 1892 * We don't need to freeze the tape because we 1893 * will now attempt to rewind/load it. 1894 */ 1895 softc->flags &= ~SA_FLAG_TAPE_MOUNTED; 1896 if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) { 1897 xpt_print(periph->path, 1898 "error %d on TUR in samount\n", error); 1899 } 1900 } 1901 } else { 1902 error = sareservereleaseunit(periph, TRUE); 1903 if (error) { 1904 return (error); 1905 } 1906 ccb = cam_periph_getccb(periph, 1); 1907 scsi_test_unit_ready(&ccb->csio, 0, sadone, 1908 MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT); 1909 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT, 1910 &softc->device_stats); 1911 QFRLS(ccb); 1912 } 1913 1914 if ((softc->flags & SA_FLAG_TAPE_MOUNTED) == 0) { 1915 struct scsi_read_block_limits_data *rblim = NULL; 1916 int comp_enabled, comp_supported; 1917 u_int8_t write_protect, guessing = 0; 1918 1919 /* 1920 * Clear out old state. 1921 */ 1922 softc->flags &= ~(SA_FLAG_TAPE_WP|SA_FLAG_TAPE_WRITTEN| 1923 SA_FLAG_ERR_PENDING|SA_FLAG_COMP_ENABLED| 1924 SA_FLAG_COMP_SUPP|SA_FLAG_COMP_UNSUPP); 1925 softc->filemarks = 0; 1926 1927 /* 1928 * *Very* first off, make sure we're loaded to BOT. 1929 */ 1930 scsi_load_unload(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, FALSE, 1931 FALSE, FALSE, 1, SSD_FULL_SIZE, REWIND_TIMEOUT); 1932 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT, 1933 &softc->device_stats); 1934 QFRLS(ccb); 1935 1936 /* 1937 * In case this doesn't work, do a REWIND instead 1938 */ 1939 if (error) { 1940 scsi_rewind(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, 1941 FALSE, SSD_FULL_SIZE, REWIND_TIMEOUT); 1942 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT, 1943 &softc->device_stats); 1944 QFRLS(ccb); 1945 } 1946 if (error) { 1947 xpt_release_ccb(ccb); 1948 goto exit; 1949 } 1950 1951 /* 1952 * Do a dummy test read to force access to the 1953 * media so that the drive will really know what's 1954 * there. We actually don't really care what the 1955 * blocksize on tape is and don't expect to really 1956 * read a full record. 1957 */ 1958 rblim = kmalloc(8192, M_SCSISA, M_INTWAIT); 1959 1960 if ((softc->quirks & SA_QUIRK_NODREAD) == 0) { 1961 scsi_sa_read_write(&ccb->csio, 0, sadone, 1962 MSG_SIMPLE_Q_TAG, 1, FALSE, 0, 8192, 1963 (void *) rblim, 8192, SSD_FULL_SIZE, 1964 IO_TIMEOUT); 1965 cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT, 1966 &softc->device_stats); 1967 QFRLS(ccb); 1968 scsi_rewind(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG, 1969 FALSE, SSD_FULL_SIZE, REWIND_TIMEOUT); 1970 error = cam_periph_runccb(ccb, saerror, CAM_RETRY_SELTO, 1971 SF_NO_PRINT | SF_RETRY_UA, 1972 &softc->device_stats); 1973 QFRLS(ccb); 1974 if (error) { 1975 xpt_print(periph->path, 1976 "unable to rewind after test read\n"); 1977 xpt_release_ccb(ccb); 1978 goto exit; 1979 } 1980 } 1981 1982 /* 1983 * Next off, determine block limits. 1984 */ 1985 scsi_read_block_limits(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, 1986 rblim, SSD_FULL_SIZE, SCSIOP_TIMEOUT); 1987 1988 error = cam_periph_runccb(ccb, saerror, CAM_RETRY_SELTO, 1989 SF_NO_PRINT | SF_RETRY_UA, &softc->device_stats); 1990 1991 QFRLS(ccb); 1992 xpt_release_ccb(ccb); 1993 1994 if (error != 0) { 1995 /* 1996 * If it's less than SCSI-2, READ BLOCK LIMITS is not 1997 * a MANDATORY command. Anyway- it doesn't matter- 1998 * we can proceed anyway. 1999 */ 2000 softc->blk_gran = 0; 2001 softc->max_blk = ~0; 2002 softc->min_blk = 0; 2003 } else { 2004 if (softc->scsi_rev >= SCSI_REV_SPC) { 2005 softc->blk_gran = RBL_GRAN(rblim); 2006 } else { 2007 softc->blk_gran = 0; 2008 } 2009 /* 2010 * We take max_blk == min_blk to mean a default to 2011 * fixed mode- but note that whatever we get out of 2012 * sagetparams below will actually determine whether 2013 * we are actually *in* fixed mode. 2014 */ 2015 softc->max_blk = scsi_3btoul(rblim->maximum); 2016 softc->min_blk = scsi_2btoul(rblim->minimum); 2017 2018 2019 } 2020 /* 2021 * Next, perform a mode sense to determine 2022 * current density, blocksize, compression etc. 2023 */ 2024 error = sagetparams(periph, SA_PARAM_ALL, 2025 &softc->media_blksize, 2026 &softc->media_density, 2027 &softc->media_numblks, 2028 &softc->buffer_mode, &write_protect, 2029 &softc->speed, &comp_supported, 2030 &comp_enabled, &softc->comp_algorithm, 2031 NULL); 2032 2033 if (error != 0) { 2034 /* 2035 * We could work a little harder here. We could 2036 * adjust our attempts to get information. It 2037 * might be an ancient tape drive. If someone 2038 * nudges us, we'll do that. 2039 */ 2040 goto exit; 2041 } 2042 2043 /* 2044 * If no quirk has determined that this is a device that is 2045 * preferred to be in fixed or variable mode, now is the time 2046 * to find out. 2047 */ 2048 if ((softc->quirks & (SA_QUIRK_FIXED|SA_QUIRK_VARIABLE)) == 0) { 2049 guessing = 1; 2050 /* 2051 * This could be expensive to find out. Luckily we 2052 * only need to do this once. If we start out in 2053 * 'default' mode, try and set ourselves to one 2054 * of the densities that would determine a wad 2055 * of other stuff. Go from highest to lowest. 2056 */ 2057 if (softc->media_density == SCSI_DEFAULT_DENSITY) { 2058 int i; 2059 static u_int8_t ctry[] = { 2060 SCSI_DENSITY_HALFINCH_PE, 2061 SCSI_DENSITY_HALFINCH_6250C, 2062 SCSI_DENSITY_HALFINCH_6250, 2063 SCSI_DENSITY_HALFINCH_1600, 2064 SCSI_DENSITY_HALFINCH_800, 2065 SCSI_DENSITY_QIC_4GB, 2066 SCSI_DENSITY_QIC_2GB, 2067 SCSI_DENSITY_QIC_525_320, 2068 SCSI_DENSITY_QIC_150, 2069 SCSI_DENSITY_QIC_120, 2070 SCSI_DENSITY_QIC_24, 2071 SCSI_DENSITY_QIC_11_9TRK, 2072 SCSI_DENSITY_QIC_11_4TRK, 2073 SCSI_DENSITY_QIC_1320, 2074 SCSI_DENSITY_QIC_3080, 2075 0 2076 }; 2077 for (i = 0; ctry[i]; i++) { 2078 error = sasetparams(periph, 2079 SA_PARAM_DENSITY, 0, ctry[i], 2080 0, SF_NO_PRINT); 2081 if (error == 0) { 2082 softc->media_density = ctry[i]; 2083 break; 2084 } 2085 } 2086 } 2087 switch (softc->media_density) { 2088 case SCSI_DENSITY_QIC_11_4TRK: 2089 case SCSI_DENSITY_QIC_11_9TRK: 2090 case SCSI_DENSITY_QIC_24: 2091 case SCSI_DENSITY_QIC_120: 2092 case SCSI_DENSITY_QIC_150: 2093 case SCSI_DENSITY_QIC_525_320: 2094 case SCSI_DENSITY_QIC_1320: 2095 case SCSI_DENSITY_QIC_3080: 2096 softc->quirks &= ~SA_QUIRK_2FM; 2097 softc->quirks |= SA_QUIRK_FIXED|SA_QUIRK_1FM; 2098 softc->last_media_blksize = 512; 2099 break; 2100 case SCSI_DENSITY_QIC_4GB: 2101 case SCSI_DENSITY_QIC_2GB: 2102 softc->quirks &= ~SA_QUIRK_2FM; 2103 softc->quirks |= SA_QUIRK_FIXED|SA_QUIRK_1FM; 2104 softc->last_media_blksize = 1024; 2105 break; 2106 default: 2107 softc->last_media_blksize = 2108 softc->media_blksize; 2109 softc->quirks |= SA_QUIRK_VARIABLE; 2110 break; 2111 } 2112 } 2113 2114 /* 2115 * If no quirk has determined that this is a device that needs 2116 * to have 2 Filemarks at EOD, now is the time to find out. 2117 */ 2118 2119 if ((softc->quirks & SA_QUIRK_2FM) == 0) { 2120 switch (softc->media_density) { 2121 case SCSI_DENSITY_HALFINCH_800: 2122 case SCSI_DENSITY_HALFINCH_1600: 2123 case SCSI_DENSITY_HALFINCH_6250: 2124 case SCSI_DENSITY_HALFINCH_6250C: 2125 case SCSI_DENSITY_HALFINCH_PE: 2126 softc->quirks &= ~SA_QUIRK_1FM; 2127 softc->quirks |= SA_QUIRK_2FM; 2128 break; 2129 default: 2130 break; 2131 } 2132 } 2133 2134 /* 2135 * Now validate that some info we got makes sense. 2136 */ 2137 if ((softc->max_blk < softc->media_blksize) || 2138 (softc->min_blk > softc->media_blksize && 2139 softc->media_blksize)) { 2140 xpt_print(periph->path, 2141 "BLOCK LIMITS (%d..%d) could not match current " 2142 "block settings (%d)- adjusting\n", softc->min_blk, 2143 softc->max_blk, softc->media_blksize); 2144 softc->max_blk = softc->min_blk = 2145 softc->media_blksize; 2146 } 2147 2148 /* 2149 * Now put ourselves into the right frame of mind based 2150 * upon quirks... 2151 */ 2152 tryagain: 2153 /* 2154 * If we want to be in FIXED mode and our current blocksize 2155 * is not equal to our last blocksize (if nonzero), try and 2156 * set ourselves to this last blocksize (as the 'preferred' 2157 * block size). The initial quirkmatch at registry sets the 2158 * initial 'last' blocksize. If, for whatever reason, this 2159 * 'last' blocksize is zero, set the blocksize to 512, 2160 * or min_blk if that's larger. 2161 */ 2162 if ((softc->quirks & SA_QUIRK_FIXED) && 2163 (softc->quirks & SA_QUIRK_NO_MODESEL) == 0 && 2164 (softc->media_blksize != softc->last_media_blksize)) { 2165 softc->media_blksize = softc->last_media_blksize; 2166 if (softc->media_blksize == 0) { 2167 softc->media_blksize = 512; 2168 if (softc->media_blksize < softc->min_blk) { 2169 softc->media_blksize = softc->min_blk; 2170 } 2171 } 2172 error = sasetparams(periph, SA_PARAM_BLOCKSIZE, 2173 softc->media_blksize, 0, 0, SF_NO_PRINT); 2174 if (error) { 2175 xpt_print(periph->path, 2176 "unable to set fixed blocksize to %d\n", 2177 softc->media_blksize); 2178 goto exit; 2179 } 2180 } 2181 2182 if ((softc->quirks & SA_QUIRK_VARIABLE) && 2183 (softc->media_blksize != 0)) { 2184 softc->last_media_blksize = softc->media_blksize; 2185 softc->media_blksize = 0; 2186 error = sasetparams(periph, SA_PARAM_BLOCKSIZE, 2187 0, 0, 0, SF_NO_PRINT); 2188 if (error) { 2189 /* 2190 * If this fails and we were guessing, just 2191 * assume that we got it wrong and go try 2192 * fixed block mode. Don't even check against 2193 * density code at this point. 2194 */ 2195 if (guessing) { 2196 softc->quirks &= ~SA_QUIRK_VARIABLE; 2197 softc->quirks |= SA_QUIRK_FIXED; 2198 if (softc->last_media_blksize == 0) 2199 softc->last_media_blksize = 512; 2200 goto tryagain; 2201 } 2202 xpt_print(periph->path, 2203 "unable to set variable blocksize\n"); 2204 goto exit; 2205 } 2206 } 2207 2208 /* 2209 * Now that we have the current block size, 2210 * set up some parameters for sastart's usage. 2211 */ 2212 if (softc->media_blksize) { 2213 softc->flags |= SA_FLAG_FIXED; 2214 if (powerof2(softc->media_blksize)) { 2215 softc->blk_shift = 2216 ffs(softc->media_blksize) - 1; 2217 softc->blk_mask = softc->media_blksize - 1; 2218 } else { 2219 softc->blk_mask = ~0; 2220 softc->blk_shift = 0; 2221 } 2222 } else { 2223 /* 2224 * The SCSI-3 spec allows 0 to mean "unspecified". 2225 * The SCSI-1 spec allows 0 to mean 'infinite'. 2226 * 2227 * Either works here. 2228 */ 2229 if (softc->max_blk == 0) { 2230 softc->max_blk = ~0; 2231 } 2232 softc->blk_shift = 0; 2233 if (softc->blk_gran != 0) { 2234 softc->blk_mask = softc->blk_gran - 1; 2235 } else { 2236 softc->blk_mask = 0; 2237 } 2238 } 2239 2240 if (write_protect) 2241 softc->flags |= SA_FLAG_TAPE_WP; 2242 2243 if (comp_supported) { 2244 if (softc->saved_comp_algorithm == 0) 2245 softc->saved_comp_algorithm = 2246 softc->comp_algorithm; 2247 softc->flags |= SA_FLAG_COMP_SUPP; 2248 if (comp_enabled) 2249 softc->flags |= SA_FLAG_COMP_ENABLED; 2250 } else 2251 softc->flags |= SA_FLAG_COMP_UNSUPP; 2252 2253 if ((softc->buffer_mode == SMH_SA_BUF_MODE_NOBUF) && 2254 (softc->quirks & SA_QUIRK_NO_MODESEL) == 0) { 2255 error = sasetparams(periph, SA_PARAM_BUFF_MODE, 0, 2256 0, 0, SF_NO_PRINT); 2257 if (error == 0) { 2258 softc->buffer_mode = SMH_SA_BUF_MODE_SIBUF; 2259 } else { 2260 xpt_print(periph->path, 2261 "unable to set buffered mode\n"); 2262 } 2263 error = 0; /* not an error */ 2264 } 2265 2266 2267 if (error == 0) { 2268 softc->flags |= SA_FLAG_TAPE_MOUNTED; 2269 } 2270 exit: 2271 if (rblim != NULL) 2272 kfree(rblim, M_SCSISA); 2273 2274 if (error != 0) { 2275 softc->dsreg = MTIO_DSREG_NIL; 2276 } else { 2277 softc->fileno = softc->blkno = 0; 2278 softc->dsreg = MTIO_DSREG_REST; 2279 } 2280 #ifdef SA_1FM_AT_EOD 2281 if ((softc->quirks & SA_QUIRK_2FM) == 0) 2282 softc->quirks |= SA_QUIRK_1FM; 2283 #else 2284 if ((softc->quirks & SA_QUIRK_1FM) == 0) 2285 softc->quirks |= SA_QUIRK_2FM; 2286 #endif 2287 } else 2288 xpt_release_ccb(ccb); 2289 2290 /* 2291 * If we return an error, we're not mounted any more, 2292 * so release any device reservation. 2293 */ 2294 if (error != 0) { 2295 sareservereleaseunit(periph, FALSE); 2296 } else { 2297 /* 2298 * Clear I/O residual. 2299 */ 2300 softc->last_io_resid = 0; 2301 softc->last_ctl_resid = 0; 2302 } 2303 return (error); 2304 } 2305 2306 /* 2307 * How many filemarks do we need to write if we were to terminate the 2308 * tape session right now? Note that this can be a negative number 2309 */ 2310 2311 static int 2312 samarkswanted(struct cam_periph *periph) 2313 { 2314 int markswanted; 2315 struct sa_softc *softc; 2316 2317 softc = (struct sa_softc *)periph->softc; 2318 markswanted = 0; 2319 if ((softc->flags & SA_FLAG_TAPE_WRITTEN) != 0) { 2320 markswanted++; 2321 if (softc->quirks & SA_QUIRK_2FM) 2322 markswanted++; 2323 } 2324 markswanted -= softc->filemarks; 2325 return (markswanted); 2326 } 2327 2328 static int 2329 sacheckeod(struct cam_periph *periph) 2330 { 2331 int error; 2332 int markswanted; 2333 2334 markswanted = samarkswanted(periph); 2335 2336 if (markswanted > 0) { 2337 error = sawritefilemarks(periph, markswanted, FALSE); 2338 } else { 2339 error = 0; 2340 } 2341 return (error); 2342 } 2343 2344 static int 2345 saerror(union ccb *ccb, u_int32_t cflgs, u_int32_t sflgs) 2346 { 2347 static const char *toobig = 2348 "%d-byte tape record bigger than supplied buffer\n"; 2349 struct cam_periph *periph; 2350 struct sa_softc *softc; 2351 struct ccb_scsiio *csio; 2352 struct scsi_sense_data *sense; 2353 u_int32_t resid = 0; 2354 int32_t info = 0; 2355 cam_status status; 2356 int error_code, sense_key, asc, ascq, error, aqvalid; 2357 2358 periph = xpt_path_periph(ccb->ccb_h.path); 2359 softc = (struct sa_softc *)periph->softc; 2360 csio = &ccb->csio; 2361 sense = &csio->sense_data; 2362 scsi_extract_sense(sense, &error_code, &sense_key, &asc, &ascq); 2363 aqvalid = sense->extra_len >= 6; 2364 error = 0; 2365 2366 status = csio->ccb_h.status & CAM_STATUS_MASK; 2367 2368 /* 2369 * Calculate/latch up, any residuals... We do this in a funny 2-step 2370 * so we can print stuff here if we have CAM_DEBUG enabled for this 2371 * unit. 2372 */ 2373 if (status == CAM_SCSI_STATUS_ERROR) { 2374 if ((sense->error_code & SSD_ERRCODE_VALID) != 0) { 2375 info = (int32_t) scsi_4btoul(sense->info); 2376 resid = info; 2377 if ((softc->flags & SA_FLAG_FIXED) != 0) 2378 resid *= softc->media_blksize; 2379 } else { 2380 resid = csio->dxfer_len; 2381 info = resid; 2382 if ((softc->flags & SA_FLAG_FIXED) != 0) { 2383 if (softc->media_blksize) 2384 info /= softc->media_blksize; 2385 } 2386 } 2387 if (CCB_Type(csio) == SA_CCB_BUFFER_IO) { 2388 bcopy((caddr_t) sense, (caddr_t) &softc->last_io_sense, 2389 sizeof (struct scsi_sense_data)); 2390 bcopy(csio->cdb_io.cdb_bytes, softc->last_io_cdb, 2391 (int) csio->cdb_len); 2392 softc->last_io_resid = resid; 2393 softc->last_resid_was_io = 1; 2394 } else { 2395 bcopy((caddr_t) sense, (caddr_t) &softc->last_ctl_sense, 2396 sizeof (struct scsi_sense_data)); 2397 bcopy(csio->cdb_io.cdb_bytes, softc->last_ctl_cdb, 2398 (int) csio->cdb_len); 2399 softc->last_ctl_resid = resid; 2400 softc->last_resid_was_io = 0; 2401 } 2402 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, ("CDB[0]=0x%x Key 0x%x " 2403 "ASC/ASCQ 0x%x/0x%x CAM STATUS 0x%x flags 0x%x resid %d " 2404 "dxfer_len %d\n", csio->cdb_io.cdb_bytes[0] & 0xff, 2405 sense_key, asc, ascq, status, 2406 sense->flags & ~SSD_KEY_RESERVED, resid, csio->dxfer_len)); 2407 } else { 2408 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 2409 ("Cam Status 0x%x\n", status)); 2410 } 2411 2412 switch (status) { 2413 case CAM_REQ_CMP: 2414 return (0); 2415 case CAM_SCSI_STATUS_ERROR: 2416 /* 2417 * If a read/write command, we handle it here. 2418 */ 2419 if (CCB_Type(csio) != SA_CCB_WAITING) { 2420 break; 2421 } 2422 /* 2423 * If this was just EOM/EOP, Filemark, Setmark or ILI detected 2424 * on a non read/write command, we assume it's not an error 2425 * and propagate the residule and return. 2426 */ 2427 if ((aqvalid && asc == 0 && ascq > 0 && ascq <= 5) || 2428 (aqvalid == 0 && sense_key == SSD_KEY_NO_SENSE)) { 2429 csio->resid = resid; 2430 QFRLS(ccb); 2431 return (0); 2432 } 2433 /* 2434 * Otherwise, we let the common code handle this. 2435 */ 2436 return (cam_periph_error(ccb, cflgs, sflgs, &softc->saved_ccb)); 2437 2438 /* 2439 * XXX: To Be Fixed 2440 * We cannot depend upon CAM honoring retry counts for these. 2441 */ 2442 case CAM_SCSI_BUS_RESET: 2443 case CAM_BDR_SENT: 2444 if (ccb->ccb_h.retry_count <= 0) { 2445 return (EIO); 2446 } 2447 /* FALLTHROUGH */ 2448 default: 2449 return (cam_periph_error(ccb, cflgs, sflgs, &softc->saved_ccb)); 2450 } 2451 2452 /* 2453 * Handle filemark, end of tape, mismatched record sizes.... 2454 * From this point out, we're only handling read/write cases. 2455 * Handle writes && reads differently. 2456 */ 2457 2458 if (csio->cdb_io.cdb_bytes[0] == SA_WRITE) { 2459 if (sense_key == SSD_KEY_VOLUME_OVERFLOW) { 2460 csio->resid = resid; 2461 error = ENOSPC; 2462 } else if (sense->flags & SSD_EOM) { 2463 softc->flags |= SA_FLAG_EOM_PENDING; 2464 /* 2465 * Grotesque as it seems, the few times 2466 * I've actually seen a non-zero resid, 2467 * the tape drive actually lied and had 2468 * written all the data!. 2469 */ 2470 csio->resid = 0; 2471 } 2472 } else { 2473 csio->resid = resid; 2474 if (sense_key == SSD_KEY_BLANK_CHECK) { 2475 if (softc->quirks & SA_QUIRK_1FM) { 2476 error = 0; 2477 softc->flags |= SA_FLAG_EOM_PENDING; 2478 } else { 2479 error = EIO; 2480 } 2481 } else if (sense->flags & SSD_FILEMARK) { 2482 if (softc->flags & SA_FLAG_FIXED) { 2483 error = -1; 2484 softc->flags |= SA_FLAG_EOF_PENDING; 2485 } 2486 /* 2487 * Unconditionally, if we detected a filemark on a read, 2488 * mark that we've run moved a file ahead. 2489 */ 2490 if (softc->fileno != (daddr_t) -1) { 2491 softc->fileno++; 2492 softc->blkno = 0; 2493 csio->ccb_h.ccb_pflags |= SA_POSITION_UPDATED; 2494 } 2495 } 2496 } 2497 2498 /* 2499 * Incorrect Length usually applies to read, but can apply to writes. 2500 */ 2501 if (error == 0 && (sense->flags & SSD_ILI)) { 2502 if (info < 0) { 2503 xpt_print(csio->ccb_h.path, toobig, 2504 csio->dxfer_len - info); 2505 csio->resid = csio->dxfer_len; 2506 error = EIO; 2507 } else { 2508 csio->resid = resid; 2509 if (softc->flags & SA_FLAG_FIXED) { 2510 softc->flags |= SA_FLAG_EIO_PENDING; 2511 } 2512 /* 2513 * Bump the block number if we hadn't seen a filemark. 2514 * Do this independent of errors (we've moved anyway). 2515 */ 2516 if ((sense->flags & SSD_FILEMARK) == 0) { 2517 if (softc->blkno != (daddr_t) -1) { 2518 softc->blkno++; 2519 csio->ccb_h.ccb_pflags |= 2520 SA_POSITION_UPDATED; 2521 } 2522 } 2523 } 2524 } 2525 2526 if (error <= 0) { 2527 /* 2528 * Unfreeze the queue if frozen as we're not returning anything 2529 * to our waiters that would indicate an I/O error has occurred 2530 * (yet). 2531 */ 2532 QFRLS(ccb); 2533 error = 0; 2534 } 2535 return (error); 2536 } 2537 2538 static int 2539 sagetparams(struct cam_periph *periph, sa_params params_to_get, 2540 u_int32_t *blocksize, u_int8_t *density, u_int32_t *numblocks, 2541 int *buff_mode, u_int8_t *write_protect, u_int8_t *speed, 2542 int *comp_supported, int *comp_enabled, u_int32_t *comp_algorithm, 2543 sa_comp_t *tcs) 2544 { 2545 union ccb *ccb; 2546 void *mode_buffer; 2547 struct scsi_mode_header_6 *mode_hdr; 2548 struct scsi_mode_blk_desc *mode_blk; 2549 int mode_buffer_len; 2550 struct sa_softc *softc; 2551 u_int8_t cpage; 2552 int error; 2553 cam_status status; 2554 2555 softc = (struct sa_softc *)periph->softc; 2556 ccb = cam_periph_getccb(periph, 1); 2557 if (softc->quirks & SA_QUIRK_NO_CPAGE) 2558 cpage = SA_DEVICE_CONFIGURATION_PAGE; 2559 else 2560 cpage = SA_DATA_COMPRESSION_PAGE; 2561 2562 retry: 2563 mode_buffer_len = sizeof(*mode_hdr) + sizeof(*mode_blk); 2564 2565 if (params_to_get & SA_PARAM_COMPRESSION) { 2566 if (softc->quirks & SA_QUIRK_NOCOMP) { 2567 *comp_supported = FALSE; 2568 params_to_get &= ~SA_PARAM_COMPRESSION; 2569 } else 2570 mode_buffer_len += sizeof (sa_comp_t); 2571 } 2572 2573 mode_buffer = kmalloc(mode_buffer_len, M_SCSISA, M_INTWAIT | M_ZERO); 2574 mode_hdr = (struct scsi_mode_header_6 *)mode_buffer; 2575 mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1]; 2576 2577 /* it is safe to retry this */ 2578 scsi_mode_sense(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, FALSE, 2579 SMS_PAGE_CTRL_CURRENT, (params_to_get & SA_PARAM_COMPRESSION) ? 2580 cpage : SMS_VENDOR_SPECIFIC_PAGE, mode_buffer, mode_buffer_len, 2581 SSD_FULL_SIZE, SCSIOP_TIMEOUT); 2582 2583 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT, 2584 &softc->device_stats); 2585 QFRLS(ccb); 2586 2587 status = ccb->ccb_h.status & CAM_STATUS_MASK; 2588 2589 if (error == EINVAL && (params_to_get & SA_PARAM_COMPRESSION) != 0) { 2590 /* 2591 * Hmm. Let's see if we can try another page... 2592 * If we've already done that, give up on compression 2593 * for this device and remember this for the future 2594 * and attempt the request without asking for compression 2595 * info. 2596 */ 2597 if (cpage == SA_DATA_COMPRESSION_PAGE) { 2598 cpage = SA_DEVICE_CONFIGURATION_PAGE; 2599 goto retry; 2600 } 2601 softc->quirks |= SA_QUIRK_NOCOMP; 2602 kfree(mode_buffer, M_SCSISA); 2603 goto retry; 2604 } else if (status == CAM_SCSI_STATUS_ERROR) { 2605 /* Tell the user about the fatal error. */ 2606 scsi_sense_print(&ccb->csio); 2607 goto sagetparamsexit; 2608 } 2609 2610 /* 2611 * If the user only wants the compression information, and 2612 * the device doesn't send back the block descriptor, it's 2613 * no big deal. If the user wants more than just 2614 * compression, though, and the device doesn't pass back the 2615 * block descriptor, we need to send another mode sense to 2616 * get the block descriptor. 2617 */ 2618 if ((mode_hdr->blk_desc_len == 0) && 2619 (params_to_get & SA_PARAM_COMPRESSION) && 2620 (params_to_get & ~(SA_PARAM_COMPRESSION))) { 2621 2622 /* 2623 * Decrease the mode buffer length by the size of 2624 * the compression page, to make sure the data 2625 * there doesn't get overwritten. 2626 */ 2627 mode_buffer_len -= sizeof (sa_comp_t); 2628 2629 /* 2630 * Now move the compression page that we presumably 2631 * got back down the memory chunk a little bit so 2632 * it doesn't get spammed. 2633 */ 2634 bcopy(&mode_hdr[0], &mode_hdr[1], sizeof (sa_comp_t)); 2635 bzero(&mode_hdr[0], sizeof (mode_hdr[0])); 2636 2637 /* 2638 * Now, we issue another mode sense and just ask 2639 * for the block descriptor, etc. 2640 */ 2641 2642 scsi_mode_sense(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, FALSE, 2643 SMS_PAGE_CTRL_CURRENT, SMS_VENDOR_SPECIFIC_PAGE, 2644 mode_buffer, mode_buffer_len, SSD_FULL_SIZE, 2645 SCSIOP_TIMEOUT); 2646 2647 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT, 2648 &softc->device_stats); 2649 QFRLS(ccb); 2650 2651 if (error != 0) 2652 goto sagetparamsexit; 2653 } 2654 2655 if (params_to_get & SA_PARAM_BLOCKSIZE) 2656 *blocksize = scsi_3btoul(mode_blk->blklen); 2657 2658 if (params_to_get & SA_PARAM_NUMBLOCKS) 2659 *numblocks = scsi_3btoul(mode_blk->nblocks); 2660 2661 if (params_to_get & SA_PARAM_BUFF_MODE) 2662 *buff_mode = mode_hdr->dev_spec & SMH_SA_BUF_MODE_MASK; 2663 2664 if (params_to_get & SA_PARAM_DENSITY) 2665 *density = mode_blk->density; 2666 2667 if (params_to_get & SA_PARAM_WP) 2668 *write_protect = (mode_hdr->dev_spec & SMH_SA_WP)? TRUE : FALSE; 2669 2670 if (params_to_get & SA_PARAM_SPEED) 2671 *speed = mode_hdr->dev_spec & SMH_SA_SPEED_MASK; 2672 2673 if (params_to_get & SA_PARAM_COMPRESSION) { 2674 sa_comp_t *ntcs = (sa_comp_t *) &mode_blk[1]; 2675 if (cpage == SA_DATA_COMPRESSION_PAGE) { 2676 struct scsi_data_compression_page *cp = &ntcs->dcomp; 2677 *comp_supported = 2678 (cp->dce_and_dcc & SA_DCP_DCC)? TRUE : FALSE; 2679 *comp_enabled = 2680 (cp->dce_and_dcc & SA_DCP_DCE)? TRUE : FALSE; 2681 *comp_algorithm = scsi_4btoul(cp->comp_algorithm); 2682 } else { 2683 struct scsi_dev_conf_page *cp = &ntcs->dconf; 2684 /* 2685 * We don't really know whether this device supports 2686 * Data Compression if the the algorithm field is 2687 * zero. Just say we do. 2688 */ 2689 *comp_supported = TRUE; 2690 *comp_enabled = 2691 (cp->sel_comp_alg != SA_COMP_NONE)? TRUE : FALSE; 2692 *comp_algorithm = cp->sel_comp_alg; 2693 } 2694 if (tcs != NULL) 2695 bcopy(ntcs, tcs, sizeof (sa_comp_t)); 2696 } 2697 2698 if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) { 2699 int idx; 2700 char *xyz = mode_buffer; 2701 xpt_print_path(periph->path); 2702 kprintf("Mode Sense Data="); 2703 for (idx = 0; idx < mode_buffer_len; idx++) 2704 kprintf(" 0x%02x", xyz[idx] & 0xff); 2705 kprintf("\n"); 2706 } 2707 2708 sagetparamsexit: 2709 2710 xpt_release_ccb(ccb); 2711 kfree(mode_buffer, M_SCSISA); 2712 return (error); 2713 } 2714 2715 /* 2716 * The purpose of this function is to set one of four different parameters 2717 * for a tape drive: 2718 * - blocksize 2719 * - density 2720 * - compression / compression algorithm 2721 * - buffering mode 2722 * 2723 * The assumption is that this will be called from saioctl(), and therefore 2724 * from a process context. Thus the waiting malloc calls below. If that 2725 * assumption ever changes, the malloc calls should be changed to be 2726 * NOWAIT mallocs. 2727 * 2728 * Any or all of the four parameters may be set when this function is 2729 * called. It should handle setting more than one parameter at once. 2730 */ 2731 static int 2732 sasetparams(struct cam_periph *periph, sa_params params_to_set, 2733 u_int32_t blocksize, u_int8_t density, u_int32_t calg, 2734 u_int32_t sense_flags) 2735 { 2736 struct sa_softc *softc; 2737 u_int32_t current_blocksize; 2738 u_int32_t current_calg; 2739 u_int8_t current_density; 2740 u_int8_t current_speed; 2741 int comp_enabled, comp_supported; 2742 void *mode_buffer; 2743 int mode_buffer_len; 2744 struct scsi_mode_header_6 *mode_hdr; 2745 struct scsi_mode_blk_desc *mode_blk; 2746 sa_comp_t *ccomp, *cpage; 2747 int buff_mode; 2748 union ccb *ccb = NULL; 2749 int error; 2750 2751 softc = (struct sa_softc *)periph->softc; 2752 2753 ccomp = kmalloc(sizeof (sa_comp_t), M_SCSISA, M_INTWAIT); 2754 2755 /* 2756 * Since it doesn't make sense to set the number of blocks, or 2757 * write protection, we won't try to get the current value. We 2758 * always want to get the blocksize, so we can set it back to the 2759 * proper value. 2760 */ 2761 error = sagetparams(periph, 2762 params_to_set | SA_PARAM_BLOCKSIZE | SA_PARAM_SPEED, 2763 ¤t_blocksize, ¤t_density, NULL, &buff_mode, NULL, 2764 ¤t_speed, &comp_supported, &comp_enabled, 2765 ¤t_calg, ccomp); 2766 2767 if (error != 0) { 2768 kfree(ccomp, M_SCSISA); 2769 return (error); 2770 } 2771 2772 mode_buffer_len = sizeof(*mode_hdr) + sizeof(*mode_blk); 2773 if (params_to_set & SA_PARAM_COMPRESSION) 2774 mode_buffer_len += sizeof (sa_comp_t); 2775 2776 mode_buffer = kmalloc(mode_buffer_len, M_SCSISA, M_INTWAIT | M_ZERO); 2777 2778 mode_hdr = (struct scsi_mode_header_6 *)mode_buffer; 2779 mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1]; 2780 2781 ccb = cam_periph_getccb(periph, 1); 2782 2783 retry: 2784 2785 if (params_to_set & SA_PARAM_COMPRESSION) { 2786 if (mode_blk) { 2787 cpage = (sa_comp_t *)&mode_blk[1]; 2788 } else { 2789 cpage = (sa_comp_t *)&mode_hdr[1]; 2790 } 2791 bcopy(ccomp, cpage, sizeof (sa_comp_t)); 2792 cpage->hdr.pagecode &= ~0x80; 2793 } else 2794 cpage = NULL; 2795 2796 /* 2797 * If the caller wants us to set the blocksize, use the one they 2798 * pass in. Otherwise, use the blocksize we got back from the 2799 * mode select above. 2800 */ 2801 if (mode_blk) { 2802 if (params_to_set & SA_PARAM_BLOCKSIZE) 2803 scsi_ulto3b(blocksize, mode_blk->blklen); 2804 else 2805 scsi_ulto3b(current_blocksize, mode_blk->blklen); 2806 2807 /* 2808 * Set density if requested, else preserve old density. 2809 * SCSI_SAME_DENSITY only applies to SCSI-2 or better 2810 * devices, else density we've latched up in our softc. 2811 */ 2812 if (params_to_set & SA_PARAM_DENSITY) { 2813 mode_blk->density = density; 2814 } else if (softc->scsi_rev > SCSI_REV_CCS) { 2815 mode_blk->density = SCSI_SAME_DENSITY; 2816 } else { 2817 mode_blk->density = softc->media_density; 2818 } 2819 } 2820 2821 /* 2822 * For mode selects, these two fields must be zero. 2823 */ 2824 mode_hdr->data_length = 0; 2825 mode_hdr->medium_type = 0; 2826 2827 /* set the speed to the current value */ 2828 mode_hdr->dev_spec = current_speed; 2829 2830 /* if set, set single-initiator buffering mode */ 2831 if (softc->buffer_mode == SMH_SA_BUF_MODE_SIBUF) { 2832 mode_hdr->dev_spec |= SMH_SA_BUF_MODE_SIBUF; 2833 } 2834 2835 if (mode_blk) 2836 mode_hdr->blk_desc_len = sizeof(struct scsi_mode_blk_desc); 2837 else 2838 mode_hdr->blk_desc_len = 0; 2839 2840 /* 2841 * First, if the user wants us to set the compression algorithm or 2842 * just turn compression on, check to make sure that this drive 2843 * supports compression. 2844 */ 2845 if (params_to_set & SA_PARAM_COMPRESSION) { 2846 /* 2847 * If the compression algorithm is 0, disable compression. 2848 * If the compression algorithm is non-zero, enable 2849 * compression and set the compression type to the 2850 * specified compression algorithm, unless the algorithm is 2851 * MT_COMP_ENABLE. In that case, we look at the 2852 * compression algorithm that is currently set and if it is 2853 * non-zero, we leave it as-is. If it is zero, and we have 2854 * saved a compression algorithm from a time when 2855 * compression was enabled before, set the compression to 2856 * the saved value. 2857 */ 2858 switch (ccomp->hdr.pagecode & ~0x80) { 2859 case SA_DEVICE_CONFIGURATION_PAGE: 2860 { 2861 struct scsi_dev_conf_page *dcp = &cpage->dconf; 2862 if (calg == 0) { 2863 dcp->sel_comp_alg = SA_COMP_NONE; 2864 break; 2865 } 2866 if (calg != MT_COMP_ENABLE) { 2867 dcp->sel_comp_alg = calg; 2868 } else if (dcp->sel_comp_alg == SA_COMP_NONE && 2869 softc->saved_comp_algorithm != 0) { 2870 dcp->sel_comp_alg = softc->saved_comp_algorithm; 2871 } 2872 break; 2873 } 2874 case SA_DATA_COMPRESSION_PAGE: 2875 if (ccomp->dcomp.dce_and_dcc & SA_DCP_DCC) { 2876 struct scsi_data_compression_page *dcp = &cpage->dcomp; 2877 if (calg == 0) { 2878 /* 2879 * Disable compression, but leave the 2880 * decompression and the capability bit 2881 * alone. 2882 */ 2883 dcp->dce_and_dcc = SA_DCP_DCC; 2884 dcp->dde_and_red |= SA_DCP_DDE; 2885 break; 2886 } 2887 /* enable compression && decompression */ 2888 dcp->dce_and_dcc = SA_DCP_DCE | SA_DCP_DCC; 2889 dcp->dde_and_red |= SA_DCP_DDE; 2890 /* 2891 * If there, use compression algorithm from caller. 2892 * Otherwise, if there's a saved compression algorithm 2893 * and there is no current algorithm, use the saved 2894 * algorithm. Else parrot back what we got and hope 2895 * for the best. 2896 */ 2897 if (calg != MT_COMP_ENABLE) { 2898 scsi_ulto4b(calg, dcp->comp_algorithm); 2899 scsi_ulto4b(calg, dcp->decomp_algorithm); 2900 } else if (scsi_4btoul(dcp->comp_algorithm) == 0 && 2901 softc->saved_comp_algorithm != 0) { 2902 scsi_ulto4b(softc->saved_comp_algorithm, 2903 dcp->comp_algorithm); 2904 scsi_ulto4b(softc->saved_comp_algorithm, 2905 dcp->decomp_algorithm); 2906 } 2907 break; 2908 } 2909 /* 2910 * Compression does not appear to be supported- 2911 * at least via the DATA COMPRESSION page. It 2912 * would be too much to ask us to believe that 2913 * the page itself is supported, but incorrectly 2914 * reports an ability to manipulate data compression, 2915 * so we'll assume that this device doesn't support 2916 * compression. We can just fall through for that. 2917 */ 2918 /* FALLTHROUGH */ 2919 default: 2920 /* 2921 * The drive doesn't seem to support compression, 2922 * so turn off the set compression bit. 2923 */ 2924 params_to_set &= ~SA_PARAM_COMPRESSION; 2925 xpt_print(periph->path, 2926 "device does not seem to support compression\n"); 2927 2928 /* 2929 * If that was the only thing the user wanted us to set, 2930 * clean up allocated resources and return with 2931 * 'operation not supported'. 2932 */ 2933 if (params_to_set == SA_PARAM_NONE) { 2934 kfree(mode_buffer, M_SCSISA); 2935 xpt_release_ccb(ccb); 2936 return (ENODEV); 2937 } 2938 2939 /* 2940 * That wasn't the only thing the user wanted us to set. 2941 * So, decrease the stated mode buffer length by the 2942 * size of the compression mode page. 2943 */ 2944 mode_buffer_len -= sizeof(sa_comp_t); 2945 } 2946 } 2947 2948 /* It is safe to retry this operation */ 2949 scsi_mode_select(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, 2950 (params_to_set & SA_PARAM_COMPRESSION)? TRUE : FALSE, 2951 FALSE, mode_buffer, mode_buffer_len, SSD_FULL_SIZE, SCSIOP_TIMEOUT); 2952 2953 error = cam_periph_runccb(ccb, saerror, 0, 2954 sense_flags, &softc->device_stats); 2955 QFRLS(ccb); 2956 2957 if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) { 2958 int idx; 2959 char *xyz = mode_buffer; 2960 xpt_print_path(periph->path); 2961 kprintf("Err%d, Mode Select Data=", error); 2962 for (idx = 0; idx < mode_buffer_len; idx++) 2963 kprintf(" 0x%02x", xyz[idx] & 0xff); 2964 kprintf("\n"); 2965 } 2966 2967 2968 if (error) { 2969 /* 2970 * If we can, try without setting density/blocksize. 2971 */ 2972 if (mode_blk) { 2973 if ((params_to_set & 2974 (SA_PARAM_DENSITY|SA_PARAM_BLOCKSIZE)) == 0) { 2975 mode_blk = NULL; 2976 goto retry; 2977 } 2978 } else { 2979 mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1]; 2980 cpage = (sa_comp_t *)&mode_blk[1]; 2981 } 2982 2983 /* 2984 * If we were setting the blocksize, and that failed, we 2985 * want to set it to its original value. If we weren't 2986 * setting the blocksize, we don't want to change it. 2987 */ 2988 scsi_ulto3b(current_blocksize, mode_blk->blklen); 2989 2990 /* 2991 * Set density if requested, else preserve old density. 2992 * SCSI_SAME_DENSITY only applies to SCSI-2 or better 2993 * devices, else density we've latched up in our softc. 2994 */ 2995 if (params_to_set & SA_PARAM_DENSITY) { 2996 mode_blk->density = current_density; 2997 } else if (softc->scsi_rev > SCSI_REV_CCS) { 2998 mode_blk->density = SCSI_SAME_DENSITY; 2999 } else { 3000 mode_blk->density = softc->media_density; 3001 } 3002 3003 if (params_to_set & SA_PARAM_COMPRESSION) 3004 bcopy(ccomp, cpage, sizeof (sa_comp_t)); 3005 3006 /* 3007 * The retry count is the only CCB field that might have been 3008 * changed that we care about, so reset it back to 1. 3009 */ 3010 ccb->ccb_h.retry_count = 1; 3011 cam_periph_runccb(ccb, saerror, 0, sense_flags, 3012 &softc->device_stats); 3013 QFRLS(ccb); 3014 } 3015 3016 xpt_release_ccb(ccb); 3017 3018 if (ccomp != NULL) 3019 kfree(ccomp, M_SCSISA); 3020 3021 if (params_to_set & SA_PARAM_COMPRESSION) { 3022 if (error) { 3023 softc->flags &= ~SA_FLAG_COMP_ENABLED; 3024 /* 3025 * Even if we get an error setting compression, 3026 * do not say that we don't support it. We could 3027 * have been wrong, or it may be media specific. 3028 * softc->flags &= ~SA_FLAG_COMP_SUPP; 3029 */ 3030 softc->saved_comp_algorithm = softc->comp_algorithm; 3031 softc->comp_algorithm = 0; 3032 } else { 3033 softc->flags |= SA_FLAG_COMP_ENABLED; 3034 softc->comp_algorithm = calg; 3035 } 3036 } 3037 3038 kfree(mode_buffer, M_SCSISA); 3039 return (error); 3040 } 3041 3042 static void 3043 saprevent(struct cam_periph *periph, int action) 3044 { 3045 struct sa_softc *softc; 3046 union ccb *ccb; 3047 int error, sf; 3048 3049 softc = (struct sa_softc *)periph->softc; 3050 3051 if ((action == PR_ALLOW) && (softc->flags & SA_FLAG_TAPE_LOCKED) == 0) 3052 return; 3053 if ((action == PR_PREVENT) && (softc->flags & SA_FLAG_TAPE_LOCKED) != 0) 3054 return; 3055 3056 /* 3057 * We can be quiet about illegal requests. 3058 */ 3059 if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) { 3060 sf = 0; 3061 } else 3062 sf = SF_QUIET_IR; 3063 3064 ccb = cam_periph_getccb(periph, 1); 3065 3066 /* It is safe to retry this operation */ 3067 scsi_prevent(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, action, 3068 SSD_FULL_SIZE, SCSIOP_TIMEOUT); 3069 3070 error = cam_periph_runccb(ccb, saerror, 0, sf, &softc->device_stats); 3071 QFRLS(ccb); 3072 if (error == 0) { 3073 if (action == PR_ALLOW) 3074 softc->flags &= ~SA_FLAG_TAPE_LOCKED; 3075 else 3076 softc->flags |= SA_FLAG_TAPE_LOCKED; 3077 } 3078 3079 xpt_release_ccb(ccb); 3080 } 3081 3082 static int 3083 sarewind(struct cam_periph *periph) 3084 { 3085 union ccb *ccb; 3086 struct sa_softc *softc; 3087 int error; 3088 3089 softc = (struct sa_softc *)periph->softc; 3090 3091 ccb = cam_periph_getccb(periph, 1); 3092 3093 /* It is safe to retry this operation */ 3094 scsi_rewind(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, FALSE, 3095 SSD_FULL_SIZE, REWIND_TIMEOUT); 3096 3097 softc->dsreg = MTIO_DSREG_REW; 3098 error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats); 3099 softc->dsreg = MTIO_DSREG_REST; 3100 3101 if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 3102 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE); 3103 3104 xpt_release_ccb(ccb); 3105 if (error == 0) 3106 softc->fileno = softc->blkno = (daddr_t) 0; 3107 else 3108 softc->fileno = softc->blkno = (daddr_t) -1; 3109 return (error); 3110 } 3111 3112 static int 3113 saspace(struct cam_periph *periph, int count, scsi_space_code code) 3114 { 3115 union ccb *ccb; 3116 struct sa_softc *softc; 3117 int error; 3118 3119 softc = (struct sa_softc *)periph->softc; 3120 3121 ccb = cam_periph_getccb(periph, 1); 3122 3123 /* This cannot be retried */ 3124 3125 scsi_space(&ccb->csio, 0, sadone, MSG_SIMPLE_Q_TAG, code, count, 3126 SSD_FULL_SIZE, SPACE_TIMEOUT); 3127 3128 /* 3129 * Clear residual because we will be using it. 3130 */ 3131 softc->last_ctl_resid = 0; 3132 3133 softc->dsreg = (count < 0)? MTIO_DSREG_REV : MTIO_DSREG_FWD; 3134 error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats); 3135 softc->dsreg = MTIO_DSREG_REST; 3136 3137 if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 3138 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE); 3139 3140 xpt_release_ccb(ccb); 3141 3142 /* 3143 * If a spacing operation has failed, we need to invalidate 3144 * this mount. 3145 * 3146 * If the spacing operation was setmarks or to end of recorded data, 3147 * we no longer know our relative position. 3148 * 3149 * If the spacing operations was spacing files in reverse, we 3150 * take account of the residual, but still check against less 3151 * than zero- if we've gone negative, we must have hit BOT. 3152 * 3153 * If the spacing operations was spacing records in reverse and 3154 * we have a residual, we've either hit BOT or hit a filemark. 3155 * In the former case, we know our new record number (0). In 3156 * the latter case, we have absolutely no idea what the real 3157 * record number is- we've stopped between the end of the last 3158 * record in the previous file and the filemark that stopped 3159 * our spacing backwards. 3160 */ 3161 if (error) { 3162 softc->fileno = softc->blkno = (daddr_t) -1; 3163 } else if (code == SS_SETMARKS || code == SS_EOD) { 3164 softc->fileno = softc->blkno = (daddr_t) -1; 3165 } else if (code == SS_FILEMARKS && softc->fileno != (daddr_t) -1) { 3166 softc->fileno += (count - softc->last_ctl_resid); 3167 if (softc->fileno < 0) /* we must of hit BOT */ 3168 softc->fileno = 0; 3169 softc->blkno = 0; 3170 } else if (code == SS_BLOCKS && softc->blkno != (daddr_t) -1) { 3171 softc->blkno += (count - softc->last_ctl_resid); 3172 if (count < 0) { 3173 if (softc->last_ctl_resid || softc->blkno < 0) { 3174 if (softc->fileno == 0) { 3175 softc->blkno = 0; 3176 } else { 3177 softc->blkno = (daddr_t) -1; 3178 } 3179 } 3180 } 3181 } 3182 return (error); 3183 } 3184 3185 static int 3186 sawritefilemarks(struct cam_periph *periph, int nmarks, int setmarks) 3187 { 3188 union ccb *ccb; 3189 struct sa_softc *softc; 3190 int error, nwm = 0; 3191 3192 softc = (struct sa_softc *)periph->softc; 3193 if (softc->open_rdonly) 3194 return (EBADF); 3195 3196 ccb = cam_periph_getccb(periph, 1); 3197 /* 3198 * Clear residual because we will be using it. 3199 */ 3200 softc->last_ctl_resid = 0; 3201 3202 softc->dsreg = MTIO_DSREG_FMK; 3203 /* this *must* not be retried */ 3204 scsi_write_filemarks(&ccb->csio, 0, sadone, MSG_SIMPLE_Q_TAG, 3205 FALSE, setmarks, nmarks, SSD_FULL_SIZE, IO_TIMEOUT); 3206 softc->dsreg = MTIO_DSREG_REST; 3207 3208 3209 error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats); 3210 3211 if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 3212 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE); 3213 3214 if (error == 0 && nmarks) { 3215 struct sa_softc *softc = (struct sa_softc *)periph->softc; 3216 nwm = nmarks - softc->last_ctl_resid; 3217 softc->filemarks += nwm; 3218 } 3219 3220 xpt_release_ccb(ccb); 3221 3222 /* 3223 * Update relative positions (if we're doing that). 3224 */ 3225 if (error) { 3226 softc->fileno = softc->blkno = (daddr_t) -1; 3227 } else if (softc->fileno != (daddr_t) -1) { 3228 softc->fileno += nwm; 3229 softc->blkno = 0; 3230 } 3231 return (error); 3232 } 3233 3234 static int 3235 sardpos(struct cam_periph *periph, int hard, u_int32_t *blkptr) 3236 { 3237 struct scsi_tape_position_data loc; 3238 union ccb *ccb; 3239 struct sa_softc *softc = (struct sa_softc *)periph->softc; 3240 int error; 3241 3242 /* 3243 * We try and flush any buffered writes here if we were writing 3244 * and we're trying to get hardware block position. It eats 3245 * up performance substantially, but I'm wary of drive firmware. 3246 * 3247 * I think that *logical* block position is probably okay- 3248 * but hardware block position might have to wait for data 3249 * to hit media to be valid. Caveat Emptor. 3250 */ 3251 3252 if (hard && (softc->flags & SA_FLAG_TAPE_WRITTEN)) { 3253 error = sawritefilemarks(periph, 0, 0); 3254 if (error && error != EACCES) 3255 return (error); 3256 } 3257 3258 ccb = cam_periph_getccb(periph, 1); 3259 scsi_read_position(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG, 3260 hard, &loc, SSD_FULL_SIZE, SCSIOP_TIMEOUT); 3261 softc->dsreg = MTIO_DSREG_RBSY; 3262 error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats); 3263 softc->dsreg = MTIO_DSREG_REST; 3264 if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 3265 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, 0); 3266 3267 if (error == 0) { 3268 if (loc.flags & SA_RPOS_UNCERTAIN) { 3269 error = EINVAL; /* nothing is certain */ 3270 } else { 3271 *blkptr = scsi_4btoul(loc.firstblk); 3272 } 3273 } 3274 3275 xpt_release_ccb(ccb); 3276 return (error); 3277 } 3278 3279 static int 3280 sasetpos(struct cam_periph *periph, int hard, u_int32_t *blkptr) 3281 { 3282 union ccb *ccb; 3283 struct sa_softc *softc; 3284 int error; 3285 3286 /* 3287 * We used to try and flush any buffered writes here. 3288 * Now we push this onto user applications to either 3289 * flush the pending writes themselves (via a zero count 3290 * WRITE FILEMARKS command) or they can trust their tape 3291 * drive to do this correctly for them. 3292 */ 3293 3294 softc = (struct sa_softc *)periph->softc; 3295 ccb = cam_periph_getccb(periph, 1); 3296 3297 3298 scsi_set_position(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG, 3299 hard, *blkptr, SSD_FULL_SIZE, SPACE_TIMEOUT); 3300 3301 3302 softc->dsreg = MTIO_DSREG_POS; 3303 error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats); 3304 softc->dsreg = MTIO_DSREG_REST; 3305 if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 3306 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, 0); 3307 xpt_release_ccb(ccb); 3308 /* 3309 * Note relative file && block number position as now unknown. 3310 */ 3311 softc->fileno = softc->blkno = (daddr_t) -1; 3312 return (error); 3313 } 3314 3315 static int 3316 saretension(struct cam_periph *periph) 3317 { 3318 union ccb *ccb; 3319 struct sa_softc *softc; 3320 int error; 3321 3322 softc = (struct sa_softc *)periph->softc; 3323 3324 ccb = cam_periph_getccb(periph, 1); 3325 3326 /* It is safe to retry this operation */ 3327 scsi_load_unload(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, FALSE, 3328 FALSE, TRUE, TRUE, SSD_FULL_SIZE, ERASE_TIMEOUT); 3329 3330 softc->dsreg = MTIO_DSREG_TEN; 3331 error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats); 3332 softc->dsreg = MTIO_DSREG_REST; 3333 3334 if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 3335 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE); 3336 xpt_release_ccb(ccb); 3337 if (error == 0) 3338 softc->fileno = softc->blkno = (daddr_t) 0; 3339 else 3340 softc->fileno = softc->blkno = (daddr_t) -1; 3341 return (error); 3342 } 3343 3344 static int 3345 sareservereleaseunit(struct cam_periph *periph, int reserve) 3346 { 3347 union ccb *ccb; 3348 struct sa_softc *softc; 3349 int error; 3350 3351 softc = (struct sa_softc *)periph->softc; 3352 ccb = cam_periph_getccb(periph, 1); 3353 3354 /* It is safe to retry this operation */ 3355 scsi_reserve_release_unit(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, 3356 FALSE, 0, SSD_FULL_SIZE, SCSIOP_TIMEOUT, reserve); 3357 softc->dsreg = MTIO_DSREG_RBSY; 3358 error = cam_periph_runccb(ccb, saerror, 0, 3359 SF_RETRY_UA | SF_NO_PRINT, &softc->device_stats); 3360 softc->dsreg = MTIO_DSREG_REST; 3361 QFRLS(ccb); 3362 xpt_release_ccb(ccb); 3363 3364 /* 3365 * If the error was Illegal Request, then the device doesn't support 3366 * RESERVE/RELEASE. This is not an error. 3367 */ 3368 if (error == EINVAL) { 3369 error = 0; 3370 } 3371 3372 return (error); 3373 } 3374 3375 static int 3376 saloadunload(struct cam_periph *periph, int load) 3377 { 3378 union ccb *ccb; 3379 struct sa_softc *softc; 3380 int error; 3381 3382 softc = (struct sa_softc *)periph->softc; 3383 3384 ccb = cam_periph_getccb(periph, 1); 3385 3386 /* It is safe to retry this operation */ 3387 scsi_load_unload(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, FALSE, 3388 FALSE, FALSE, load, SSD_FULL_SIZE, REWIND_TIMEOUT); 3389 3390 softc->dsreg = (load)? MTIO_DSREG_LD : MTIO_DSREG_UNL; 3391 error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats); 3392 softc->dsreg = MTIO_DSREG_REST; 3393 QFRLS(ccb); 3394 xpt_release_ccb(ccb); 3395 3396 if (error || load == 0) 3397 softc->fileno = softc->blkno = (daddr_t) -1; 3398 else if (error == 0) 3399 softc->fileno = softc->blkno = (daddr_t) 0; 3400 return (error); 3401 } 3402 3403 static int 3404 saerase(struct cam_periph *periph, int longerase) 3405 { 3406 3407 union ccb *ccb; 3408 struct sa_softc *softc; 3409 int error; 3410 3411 softc = (struct sa_softc *)periph->softc; 3412 if (softc->open_rdonly) 3413 return (EBADF); 3414 3415 ccb = cam_periph_getccb(periph, 1); 3416 3417 scsi_erase(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG, FALSE, longerase, 3418 SSD_FULL_SIZE, ERASE_TIMEOUT); 3419 3420 softc->dsreg = MTIO_DSREG_ZER; 3421 error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats); 3422 softc->dsreg = MTIO_DSREG_REST; 3423 3424 if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 3425 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE); 3426 xpt_release_ccb(ccb); 3427 return (error); 3428 } 3429 3430 #endif /* _KERNEL */ 3431 3432 /* 3433 * Read tape block limits command. 3434 */ 3435 void 3436 scsi_read_block_limits(struct ccb_scsiio *csio, u_int32_t retries, 3437 void (*cbfcnp)(struct cam_periph *, union ccb *), 3438 u_int8_t tag_action, 3439 struct scsi_read_block_limits_data *rlimit_buf, 3440 u_int8_t sense_len, u_int32_t timeout) 3441 { 3442 struct scsi_read_block_limits *scsi_cmd; 3443 3444 cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_IN, tag_action, 3445 (u_int8_t *)rlimit_buf, sizeof(*rlimit_buf), sense_len, 3446 sizeof(*scsi_cmd), timeout); 3447 3448 scsi_cmd = (struct scsi_read_block_limits *)&csio->cdb_io.cdb_bytes; 3449 bzero(scsi_cmd, sizeof(*scsi_cmd)); 3450 scsi_cmd->opcode = READ_BLOCK_LIMITS; 3451 } 3452 3453 void 3454 scsi_sa_read_write(struct ccb_scsiio *csio, u_int32_t retries, 3455 void (*cbfcnp)(struct cam_periph *, union ccb *), 3456 u_int8_t tag_action, int readop, int sli, 3457 int fixed, u_int32_t length, u_int8_t *data_ptr, 3458 u_int32_t dxfer_len, u_int8_t sense_len, u_int32_t timeout) 3459 { 3460 struct scsi_sa_rw *scsi_cmd; 3461 3462 scsi_cmd = (struct scsi_sa_rw *)&csio->cdb_io.cdb_bytes; 3463 scsi_cmd->opcode = readop ? SA_READ : SA_WRITE; 3464 scsi_cmd->sli_fixed = 0; 3465 if (sli && readop) 3466 scsi_cmd->sli_fixed |= SAR_SLI; 3467 if (fixed) 3468 scsi_cmd->sli_fixed |= SARW_FIXED; 3469 scsi_ulto3b(length, scsi_cmd->length); 3470 scsi_cmd->control = 0; 3471 3472 cam_fill_csio(csio, retries, cbfcnp, readop ? CAM_DIR_IN : CAM_DIR_OUT, 3473 tag_action, data_ptr, dxfer_len, sense_len, 3474 sizeof(*scsi_cmd), timeout); 3475 } 3476 3477 void 3478 scsi_load_unload(struct ccb_scsiio *csio, u_int32_t retries, 3479 void (*cbfcnp)(struct cam_periph *, union ccb *), 3480 u_int8_t tag_action, int immediate, int eot, 3481 int reten, int load, u_int8_t sense_len, 3482 u_int32_t timeout) 3483 { 3484 struct scsi_load_unload *scsi_cmd; 3485 3486 scsi_cmd = (struct scsi_load_unload *)&csio->cdb_io.cdb_bytes; 3487 bzero(scsi_cmd, sizeof(*scsi_cmd)); 3488 scsi_cmd->opcode = LOAD_UNLOAD; 3489 if (immediate) 3490 scsi_cmd->immediate = SLU_IMMED; 3491 if (eot) 3492 scsi_cmd->eot_reten_load |= SLU_EOT; 3493 if (reten) 3494 scsi_cmd->eot_reten_load |= SLU_RETEN; 3495 if (load) 3496 scsi_cmd->eot_reten_load |= SLU_LOAD; 3497 3498 cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, 3499 NULL, 0, sense_len, sizeof(*scsi_cmd), timeout); 3500 } 3501 3502 void 3503 scsi_rewind(struct ccb_scsiio *csio, u_int32_t retries, 3504 void (*cbfcnp)(struct cam_periph *, union ccb *), 3505 u_int8_t tag_action, int immediate, u_int8_t sense_len, 3506 u_int32_t timeout) 3507 { 3508 struct scsi_rewind *scsi_cmd; 3509 3510 scsi_cmd = (struct scsi_rewind *)&csio->cdb_io.cdb_bytes; 3511 bzero(scsi_cmd, sizeof(*scsi_cmd)); 3512 scsi_cmd->opcode = REWIND; 3513 if (immediate) 3514 scsi_cmd->immediate = SREW_IMMED; 3515 3516 cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL, 3517 0, sense_len, sizeof(*scsi_cmd), timeout); 3518 } 3519 3520 void 3521 scsi_space(struct ccb_scsiio *csio, u_int32_t retries, 3522 void (*cbfcnp)(struct cam_periph *, union ccb *), 3523 u_int8_t tag_action, scsi_space_code code, 3524 u_int32_t count, u_int8_t sense_len, u_int32_t timeout) 3525 { 3526 struct scsi_space *scsi_cmd; 3527 3528 scsi_cmd = (struct scsi_space *)&csio->cdb_io.cdb_bytes; 3529 scsi_cmd->opcode = SPACE; 3530 scsi_cmd->code = code; 3531 scsi_ulto3b(count, scsi_cmd->count); 3532 scsi_cmd->control = 0; 3533 3534 cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL, 3535 0, sense_len, sizeof(*scsi_cmd), timeout); 3536 } 3537 3538 void 3539 scsi_write_filemarks(struct ccb_scsiio *csio, u_int32_t retries, 3540 void (*cbfcnp)(struct cam_periph *, union ccb *), 3541 u_int8_t tag_action, int immediate, int setmark, 3542 u_int32_t num_marks, u_int8_t sense_len, 3543 u_int32_t timeout) 3544 { 3545 struct scsi_write_filemarks *scsi_cmd; 3546 3547 scsi_cmd = (struct scsi_write_filemarks *)&csio->cdb_io.cdb_bytes; 3548 bzero(scsi_cmd, sizeof(*scsi_cmd)); 3549 scsi_cmd->opcode = WRITE_FILEMARKS; 3550 if (immediate) 3551 scsi_cmd->byte2 |= SWFMRK_IMMED; 3552 if (setmark) 3553 scsi_cmd->byte2 |= SWFMRK_WSMK; 3554 3555 scsi_ulto3b(num_marks, scsi_cmd->num_marks); 3556 3557 cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL, 3558 0, sense_len, sizeof(*scsi_cmd), timeout); 3559 } 3560 3561 /* 3562 * The reserve and release unit commands differ only by their opcodes. 3563 */ 3564 void 3565 scsi_reserve_release_unit(struct ccb_scsiio *csio, u_int32_t retries, 3566 void (*cbfcnp)(struct cam_periph *, union ccb *), 3567 u_int8_t tag_action, int third_party, 3568 int third_party_id, u_int8_t sense_len, 3569 u_int32_t timeout, int reserve) 3570 { 3571 struct scsi_reserve_release_unit *scsi_cmd; 3572 3573 scsi_cmd = (struct scsi_reserve_release_unit *)&csio->cdb_io.cdb_bytes; 3574 bzero(scsi_cmd, sizeof(*scsi_cmd)); 3575 3576 if (reserve) 3577 scsi_cmd->opcode = RESERVE_UNIT; 3578 else 3579 scsi_cmd->opcode = RELEASE_UNIT; 3580 3581 if (third_party) { 3582 scsi_cmd->lun_thirdparty |= SRRU_3RD_PARTY; 3583 scsi_cmd->lun_thirdparty |= 3584 ((third_party_id << SRRU_3RD_SHAMT) & SRRU_3RD_MASK); 3585 } 3586 3587 cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL, 3588 0, sense_len, sizeof(*scsi_cmd), timeout); 3589 } 3590 3591 void 3592 scsi_erase(struct ccb_scsiio *csio, u_int32_t retries, 3593 void (*cbfcnp)(struct cam_periph *, union ccb *), 3594 u_int8_t tag_action, int immediate, int long_erase, 3595 u_int8_t sense_len, u_int32_t timeout) 3596 { 3597 struct scsi_erase *scsi_cmd; 3598 3599 scsi_cmd = (struct scsi_erase *)&csio->cdb_io.cdb_bytes; 3600 bzero(scsi_cmd, sizeof(*scsi_cmd)); 3601 3602 scsi_cmd->opcode = ERASE; 3603 3604 if (immediate) 3605 scsi_cmd->lun_imm_long |= SE_IMMED; 3606 3607 if (long_erase) 3608 scsi_cmd->lun_imm_long |= SE_LONG; 3609 3610 cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL, 3611 0, sense_len, sizeof(*scsi_cmd), timeout); 3612 } 3613 3614 /* 3615 * Read Tape Position command. 3616 */ 3617 void 3618 scsi_read_position(struct ccb_scsiio *csio, u_int32_t retries, 3619 void (*cbfcnp)(struct cam_periph *, union ccb *), 3620 u_int8_t tag_action, int hardsoft, 3621 struct scsi_tape_position_data *sbp, 3622 u_int8_t sense_len, u_int32_t timeout) 3623 { 3624 struct scsi_tape_read_position *scmd; 3625 3626 cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_IN, tag_action, 3627 (u_int8_t *)sbp, sizeof (*sbp), sense_len, sizeof(*scmd), timeout); 3628 scmd = (struct scsi_tape_read_position *)&csio->cdb_io.cdb_bytes; 3629 bzero(scmd, sizeof(*scmd)); 3630 scmd->opcode = READ_POSITION; 3631 scmd->byte1 = hardsoft; 3632 } 3633 3634 /* 3635 * Set Tape Position command. 3636 */ 3637 void 3638 scsi_set_position(struct ccb_scsiio *csio, u_int32_t retries, 3639 void (*cbfcnp)(struct cam_periph *, union ccb *), 3640 u_int8_t tag_action, int hardsoft, u_int32_t blkno, 3641 u_int8_t sense_len, u_int32_t timeout) 3642 { 3643 struct scsi_tape_locate *scmd; 3644 3645 cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, 3646 (u_int8_t *)NULL, 0, sense_len, sizeof(*scmd), timeout); 3647 scmd = (struct scsi_tape_locate *)&csio->cdb_io.cdb_bytes; 3648 bzero(scmd, sizeof(*scmd)); 3649 scmd->opcode = LOCATE; 3650 if (hardsoft) 3651 scmd->byte1 |= SA_SPOS_BT; 3652 scsi_ulto4b(blkno, scmd->blkaddr); 3653 } 3654