scsi_sa.c revision 273736
1/*- 2 * Implementation of SCSI Sequential Access Peripheral driver for CAM. 3 * 4 * Copyright (c) 1999, 2000 Matthew Jacob 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions, and the following disclaimer, 12 * without modification, immediately at the beginning of the file. 13 * 2. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 20 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29#include <sys/cdefs.h> 30__FBSDID("$FreeBSD: stable/10/sys/cam/scsi/scsi_sa.c 273736 2014-10-27 14:38:00Z hselasky $"); 31 32#include <sys/param.h> 33#include <sys/queue.h> 34#ifdef _KERNEL 35#include <sys/systm.h> 36#include <sys/kernel.h> 37#endif 38#include <sys/types.h> 39#include <sys/time.h> 40#include <sys/bio.h> 41#include <sys/limits.h> 42#include <sys/malloc.h> 43#include <sys/mtio.h> 44#ifdef _KERNEL 45#include <sys/conf.h> 46#include <sys/sysctl.h> 47#include <sys/taskqueue.h> 48#endif 49#include <sys/fcntl.h> 50#include <sys/devicestat.h> 51 52#ifndef _KERNEL 53#include <stdio.h> 54#include <string.h> 55#endif 56 57#include <cam/cam.h> 58#include <cam/cam_ccb.h> 59#include <cam/cam_periph.h> 60#include <cam/cam_xpt_periph.h> 61#include <cam/cam_debug.h> 62 63#include <cam/scsi/scsi_all.h> 64#include <cam/scsi/scsi_message.h> 65#include <cam/scsi/scsi_sa.h> 66 67#ifdef _KERNEL 68 69#include <opt_sa.h> 70 71#ifndef SA_IO_TIMEOUT 72#define SA_IO_TIMEOUT 4 73#endif 74#ifndef SA_SPACE_TIMEOUT 75#define SA_SPACE_TIMEOUT 1 * 60 76#endif 77#ifndef SA_REWIND_TIMEOUT 78#define SA_REWIND_TIMEOUT 2 * 60 79#endif 80#ifndef SA_ERASE_TIMEOUT 81#define SA_ERASE_TIMEOUT 4 * 60 82#endif 83 84#define SCSIOP_TIMEOUT (60 * 1000) /* not an option */ 85 86#define IO_TIMEOUT (SA_IO_TIMEOUT * 60 * 1000) 87#define REWIND_TIMEOUT (SA_REWIND_TIMEOUT * 60 * 1000) 88#define ERASE_TIMEOUT (SA_ERASE_TIMEOUT * 60 * 1000) 89#define SPACE_TIMEOUT (SA_SPACE_TIMEOUT * 60 * 1000) 90 91/* 92 * Additional options that can be set for config: SA_1FM_AT_EOT 93 */ 94 95#ifndef UNUSED_PARAMETER 96#define UNUSED_PARAMETER(x) x = x 97#endif 98 99#define QFRLS(ccb) \ 100 if (((ccb)->ccb_h.status & CAM_DEV_QFRZN) != 0) \ 101 cam_release_devq((ccb)->ccb_h.path, 0, 0, 0, FALSE) 102 103/* 104 * Driver states 105 */ 106 107static MALLOC_DEFINE(M_SCSISA, "SCSI sa", "SCSI sequential access buffers"); 108 109typedef enum { 110 SA_STATE_NORMAL, SA_STATE_ABNORMAL 111} sa_state; 112 113#define ccb_pflags ppriv_field0 114#define ccb_bp ppriv_ptr1 115 116/* bits in ccb_pflags */ 117#define SA_POSITION_UPDATED 0x1 118 119 120typedef enum { 121 SA_FLAG_OPEN = 0x0001, 122 SA_FLAG_FIXED = 0x0002, 123 SA_FLAG_TAPE_LOCKED = 0x0004, 124 SA_FLAG_TAPE_MOUNTED = 0x0008, 125 SA_FLAG_TAPE_WP = 0x0010, 126 SA_FLAG_TAPE_WRITTEN = 0x0020, 127 SA_FLAG_EOM_PENDING = 0x0040, 128 SA_FLAG_EIO_PENDING = 0x0080, 129 SA_FLAG_EOF_PENDING = 0x0100, 130 SA_FLAG_ERR_PENDING = (SA_FLAG_EOM_PENDING|SA_FLAG_EIO_PENDING| 131 SA_FLAG_EOF_PENDING), 132 SA_FLAG_INVALID = 0x0200, 133 SA_FLAG_COMP_ENABLED = 0x0400, 134 SA_FLAG_COMP_SUPP = 0x0800, 135 SA_FLAG_COMP_UNSUPP = 0x1000, 136 SA_FLAG_TAPE_FROZEN = 0x2000 137} sa_flags; 138 139typedef enum { 140 SA_MODE_REWIND = 0x00, 141 SA_MODE_NOREWIND = 0x01, 142 SA_MODE_OFFLINE = 0x02 143} sa_mode; 144 145typedef enum { 146 SA_PARAM_NONE = 0x00, 147 SA_PARAM_BLOCKSIZE = 0x01, 148 SA_PARAM_DENSITY = 0x02, 149 SA_PARAM_COMPRESSION = 0x04, 150 SA_PARAM_BUFF_MODE = 0x08, 151 SA_PARAM_NUMBLOCKS = 0x10, 152 SA_PARAM_WP = 0x20, 153 SA_PARAM_SPEED = 0x40, 154 SA_PARAM_ALL = 0x7f 155} sa_params; 156 157typedef enum { 158 SA_QUIRK_NONE = 0x00, 159 SA_QUIRK_NOCOMP = 0x01, /* Can't deal with compression at all */ 160 SA_QUIRK_FIXED = 0x02, /* Force fixed mode */ 161 SA_QUIRK_VARIABLE = 0x04, /* Force variable mode */ 162 SA_QUIRK_2FM = 0x08, /* Needs Two File Marks at EOD */ 163 SA_QUIRK_1FM = 0x10, /* No more than 1 File Mark at EOD */ 164 SA_QUIRK_NODREAD = 0x20, /* Don't try and dummy read density */ 165 SA_QUIRK_NO_MODESEL = 0x40, /* Don't do mode select at all */ 166 SA_QUIRK_NO_CPAGE = 0x80 /* Don't use DEVICE COMPRESSION page */ 167} sa_quirks; 168 169#define SA_QUIRK_BIT_STRING \ 170 "\020" \ 171 "\001NOCOMP" \ 172 "\002FIXED" \ 173 "\003VARIABLE" \ 174 "\0042FM" \ 175 "\0051FM" \ 176 "\006NODREAD" \ 177 "\007NO_MODESEL" \ 178 "\010NO_CPAGE" 179 180#define SAMODE(z) (dev2unit(z) & 0x3) 181#define SADENSITY(z) ((dev2unit(z) >> 2) & 0x3) 182#define SA_IS_CTRL(z) (dev2unit(z) & (1 << 4)) 183 184#define SA_NOT_CTLDEV 0 185#define SA_CTLDEV 1 186 187#define SA_ATYPE_R 0 188#define SA_ATYPE_NR 1 189#define SA_ATYPE_ER 2 190 191#define SAMINOR(ctl, mode, access) \ 192 ((ctl << 4) | (mode << 2) | (access & 0x3)) 193 194#define SA_NUM_MODES 4 195struct sa_devs { 196 struct cdev *ctl_dev; 197 struct sa_mode_devs { 198 struct cdev *r_dev; 199 struct cdev *nr_dev; 200 struct cdev *er_dev; 201 } mode_devs[SA_NUM_MODES]; 202}; 203 204struct sa_softc { 205 sa_state state; 206 sa_flags flags; 207 sa_quirks quirks; 208 u_int si_flags; 209 struct bio_queue_head bio_queue; 210 int queue_count; 211 struct devstat *device_stats; 212 struct sa_devs devs; 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 maxio; 219 u_int32_t cpi_maxio; 220 int allow_io_split; 221 u_int32_t comp_algorithm; 222 u_int32_t saved_comp_algorithm; 223 u_int32_t media_blksize; 224 u_int32_t last_media_blksize; 225 u_int32_t media_numblks; 226 u_int8_t media_density; 227 u_int8_t speed; 228 u_int8_t scsi_rev; 229 u_int8_t dsreg; /* mtio mt_dsreg, redux */ 230 int buffer_mode; 231 int filemarks; 232 union ccb saved_ccb; 233 int last_resid_was_io; 234 235 /* 236 * Relative to BOT Location. 237 */ 238 daddr_t fileno; 239 daddr_t blkno; 240 241 /* 242 * Latched Error Info 243 */ 244 struct { 245 struct scsi_sense_data _last_io_sense; 246 u_int64_t _last_io_resid; 247 u_int8_t _last_io_cdb[CAM_MAX_CDBLEN]; 248 struct scsi_sense_data _last_ctl_sense; 249 u_int64_t _last_ctl_resid; 250 u_int8_t _last_ctl_cdb[CAM_MAX_CDBLEN]; 251#define last_io_sense errinfo._last_io_sense 252#define last_io_resid errinfo._last_io_resid 253#define last_io_cdb errinfo._last_io_cdb 254#define last_ctl_sense errinfo._last_ctl_sense 255#define last_ctl_resid errinfo._last_ctl_resid 256#define last_ctl_cdb errinfo._last_ctl_cdb 257 } errinfo; 258 /* 259 * Misc other flags/state 260 */ 261 u_int32_t 262 : 29, 263 open_rdonly : 1, /* open read-only */ 264 open_pending_mount : 1, /* open pending mount */ 265 ctrl_mode : 1; /* control device open */ 266 267 struct task sysctl_task; 268 struct sysctl_ctx_list sysctl_ctx; 269 struct sysctl_oid *sysctl_tree; 270}; 271 272struct sa_quirk_entry { 273 struct scsi_inquiry_pattern inq_pat; /* matching pattern */ 274 sa_quirks quirks; /* specific quirk type */ 275 u_int32_t prefblk; /* preferred blocksize when in fixed mode */ 276}; 277 278static struct sa_quirk_entry sa_quirk_table[] = 279{ 280 { 281 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "OnStream", 282 "ADR*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_NODREAD | 283 SA_QUIRK_1FM|SA_QUIRK_NO_MODESEL, 32768 284 }, 285 { 286 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE", 287 "Python 06408*", "*"}, SA_QUIRK_NODREAD, 0 288 }, 289 { 290 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE", 291 "Python 25601*", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_NODREAD, 0 292 }, 293 { 294 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE", 295 "Python*", "*"}, SA_QUIRK_NODREAD, 0 296 }, 297 { 298 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE", 299 "VIPER 150*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512 300 }, 301 { 302 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE", 303 "VIPER 2525 25462", "-011"}, 304 SA_QUIRK_NOCOMP|SA_QUIRK_1FM|SA_QUIRK_NODREAD, 0 305 }, 306 { 307 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE", 308 "VIPER 2525*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 1024 309 }, 310#if 0 311 { 312 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP", 313 "C15*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_NO_CPAGE, 0, 314 }, 315#endif 316 { 317 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP", 318 "C56*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0 319 }, 320 { 321 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP", 322 "T20*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512 323 }, 324 { 325 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP", 326 "T4000*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512 327 }, 328 { 329 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP", 330 "HP-88780*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0 331 }, 332 { 333 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "KENNEDY", 334 "*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0 335 }, 336 { 337 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "M4 DATA", 338 "123107 SCSI*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0 339 }, 340 { /* jreynold@primenet.com */ 341 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "Seagate", 342 "STT8000N*", "*"}, SA_QUIRK_1FM, 0 343 }, 344 { /* mike@sentex.net */ 345 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "Seagate", 346 "STT20000*", "*"}, SA_QUIRK_1FM, 0 347 }, 348 { 349 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "SEAGATE", 350 "DAT 06241-XXX", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0 351 }, 352 { 353 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG", 354 " TDC 3600", "U07:"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512 355 }, 356 { 357 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG", 358 " TDC 3800", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512 359 }, 360 { 361 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG", 362 " TDC 4100", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512 363 }, 364 { 365 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG", 366 " TDC 4200", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512 367 }, 368 { 369 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG", 370 " SLR*", "*"}, SA_QUIRK_1FM, 0 371 }, 372 { 373 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "WANGTEK", 374 "5525ES*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512 375 }, 376 { 377 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "WANGTEK", 378 "51000*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 1024 379 } 380}; 381 382static d_open_t saopen; 383static d_close_t saclose; 384static d_strategy_t sastrategy; 385static d_ioctl_t saioctl; 386static periph_init_t sainit; 387static periph_ctor_t saregister; 388static periph_oninv_t saoninvalidate; 389static periph_dtor_t sacleanup; 390static periph_start_t sastart; 391static void saasync(void *callback_arg, u_int32_t code, 392 struct cam_path *path, void *arg); 393static void sadone(struct cam_periph *periph, 394 union ccb *start_ccb); 395static int saerror(union ccb *ccb, u_int32_t cam_flags, 396 u_int32_t sense_flags); 397static int samarkswanted(struct cam_periph *); 398static int sacheckeod(struct cam_periph *periph); 399static int sagetparams(struct cam_periph *periph, 400 sa_params params_to_get, 401 u_int32_t *blocksize, u_int8_t *density, 402 u_int32_t *numblocks, int *buff_mode, 403 u_int8_t *write_protect, u_int8_t *speed, 404 int *comp_supported, int *comp_enabled, 405 u_int32_t *comp_algorithm, 406 sa_comp_t *comp_page); 407static int sasetparams(struct cam_periph *periph, 408 sa_params params_to_set, 409 u_int32_t blocksize, u_int8_t density, 410 u_int32_t comp_algorithm, 411 u_int32_t sense_flags); 412static void saprevent(struct cam_periph *periph, int action); 413static int sarewind(struct cam_periph *periph); 414static int saspace(struct cam_periph *periph, int count, 415 scsi_space_code code); 416static int samount(struct cam_periph *, int, struct cdev *); 417static int saretension(struct cam_periph *periph); 418static int sareservereleaseunit(struct cam_periph *periph, 419 int reserve); 420static int saloadunload(struct cam_periph *periph, int load); 421static int saerase(struct cam_periph *periph, int longerase); 422static int sawritefilemarks(struct cam_periph *periph, 423 int nmarks, int setmarks); 424static int sardpos(struct cam_periph *periph, int, u_int32_t *); 425static int sasetpos(struct cam_periph *periph, int, u_int32_t *); 426 427 428#ifndef SA_DEFAULT_IO_SPLIT 429#define SA_DEFAULT_IO_SPLIT 0 430#endif 431 432static int sa_allow_io_split = SA_DEFAULT_IO_SPLIT; 433 434/* 435 * Tunable to allow the user to set a global allow_io_split value. Note 436 * that this WILL GO AWAY in FreeBSD 11.0. Silently splitting the I/O up 437 * is bad behavior, because it hides the true tape block size from the 438 * application. 439 */ 440TUNABLE_INT("kern.cam.sa.allow_io_split", &sa_allow_io_split); 441static SYSCTL_NODE(_kern_cam, OID_AUTO, sa, CTLFLAG_RD, 0, 442 "CAM Sequential Access Tape Driver"); 443 444static struct periph_driver sadriver = 445{ 446 sainit, "sa", 447 TAILQ_HEAD_INITIALIZER(sadriver.units), /* generation */ 0 448}; 449 450PERIPHDRIVER_DECLARE(sa, sadriver); 451 452/* For 2.2-stable support */ 453#ifndef D_TAPE 454#define D_TAPE 0 455#endif 456 457 458static struct cdevsw sa_cdevsw = { 459 .d_version = D_VERSION, 460 .d_open = saopen, 461 .d_close = saclose, 462 .d_read = physread, 463 .d_write = physwrite, 464 .d_ioctl = saioctl, 465 .d_strategy = sastrategy, 466 .d_name = "sa", 467 .d_flags = D_TAPE, 468}; 469 470static int 471saopen(struct cdev *dev, int flags, int fmt, struct thread *td) 472{ 473 struct cam_periph *periph; 474 struct sa_softc *softc; 475 int error; 476 477 periph = (struct cam_periph *)dev->si_drv1; 478 if (cam_periph_acquire(periph) != CAM_REQ_CMP) { 479 return (ENXIO); 480 } 481 482 cam_periph_lock(periph); 483 484 softc = (struct sa_softc *)periph->softc; 485 486 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE|CAM_DEBUG_INFO, 487 ("saopen(%s): softc=0x%x\n", devtoname(dev), softc->flags)); 488 489 if (SA_IS_CTRL(dev)) { 490 softc->ctrl_mode = 1; 491 cam_periph_unlock(periph); 492 return (0); 493 } 494 495 if ((error = cam_periph_hold(periph, PRIBIO|PCATCH)) != 0) { 496 cam_periph_unlock(periph); 497 cam_periph_release(periph); 498 return (error); 499 } 500 501 if (softc->flags & SA_FLAG_OPEN) { 502 error = EBUSY; 503 } else if (softc->flags & SA_FLAG_INVALID) { 504 error = ENXIO; 505 } else { 506 /* 507 * Preserve whether this is a read_only open. 508 */ 509 softc->open_rdonly = (flags & O_RDWR) == O_RDONLY; 510 511 /* 512 * The function samount ensures media is loaded and ready. 513 * It also does a device RESERVE if the tape isn't yet mounted. 514 * 515 * If the mount fails and this was a non-blocking open, 516 * make this a 'open_pending_mount' action. 517 */ 518 error = samount(periph, flags, dev); 519 if (error && (flags & O_NONBLOCK)) { 520 softc->flags |= SA_FLAG_OPEN; 521 softc->open_pending_mount = 1; 522 cam_periph_unhold(periph); 523 cam_periph_unlock(periph); 524 return (0); 525 } 526 } 527 528 if (error) { 529 cam_periph_unhold(periph); 530 cam_periph_unlock(periph); 531 cam_periph_release(periph); 532 return (error); 533 } 534 535 saprevent(periph, PR_PREVENT); 536 softc->flags |= SA_FLAG_OPEN; 537 538 cam_periph_unhold(periph); 539 cam_periph_unlock(periph); 540 return (error); 541} 542 543static int 544saclose(struct cdev *dev, int flag, int fmt, struct thread *td) 545{ 546 struct cam_periph *periph; 547 struct sa_softc *softc; 548 int mode, error, writing, tmp; 549 int closedbits = SA_FLAG_OPEN; 550 551 mode = SAMODE(dev); 552 periph = (struct cam_periph *)dev->si_drv1; 553 if (periph == NULL) 554 return (ENXIO); 555 556 cam_periph_lock(periph); 557 558 softc = (struct sa_softc *)periph->softc; 559 560 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE|CAM_DEBUG_INFO, 561 ("saclose(%s): softc=0x%x\n", devtoname(dev), softc->flags)); 562 563 564 softc->open_rdonly = 0; 565 if (SA_IS_CTRL(dev)) { 566 softc->ctrl_mode = 0; 567 cam_periph_unlock(periph); 568 cam_periph_release(periph); 569 return (0); 570 } 571 572 if (softc->open_pending_mount) { 573 softc->flags &= ~SA_FLAG_OPEN; 574 softc->open_pending_mount = 0; 575 cam_periph_unlock(periph); 576 cam_periph_release(periph); 577 return (0); 578 } 579 580 if ((error = cam_periph_hold(periph, PRIBIO)) != 0) { 581 cam_periph_unlock(periph); 582 return (error); 583 } 584 585 /* 586 * Were we writing the tape? 587 */ 588 writing = (softc->flags & SA_FLAG_TAPE_WRITTEN) != 0; 589 590 /* 591 * See whether or not we need to write filemarks. If this 592 * fails, we probably have to assume we've lost tape 593 * position. 594 */ 595 error = sacheckeod(periph); 596 if (error) { 597 xpt_print(periph->path, 598 "failed to write terminating filemark(s)\n"); 599 softc->flags |= SA_FLAG_TAPE_FROZEN; 600 } 601 602 /* 603 * Whatever we end up doing, allow users to eject tapes from here on. 604 */ 605 saprevent(periph, PR_ALLOW); 606 607 /* 608 * Decide how to end... 609 */ 610 if ((softc->flags & SA_FLAG_TAPE_MOUNTED) == 0) { 611 closedbits |= SA_FLAG_TAPE_FROZEN; 612 } else switch (mode) { 613 case SA_MODE_OFFLINE: 614 /* 615 * An 'offline' close is an unconditional release of 616 * frozen && mount conditions, irrespective of whether 617 * these operations succeeded. The reason for this is 618 * to allow at least some kind of programmatic way 619 * around our state getting all fouled up. If somebody 620 * issues an 'offline' command, that will be allowed 621 * to clear state. 622 */ 623 (void) sarewind(periph); 624 (void) saloadunload(periph, FALSE); 625 closedbits |= SA_FLAG_TAPE_MOUNTED|SA_FLAG_TAPE_FROZEN; 626 break; 627 case SA_MODE_REWIND: 628 /* 629 * If the rewind fails, return an error- if anyone cares, 630 * but not overwriting any previous error. 631 * 632 * We don't clear the notion of mounted here, but we do 633 * clear the notion of frozen if we successfully rewound. 634 */ 635 tmp = sarewind(periph); 636 if (tmp) { 637 if (error != 0) 638 error = tmp; 639 } else { 640 closedbits |= SA_FLAG_TAPE_FROZEN; 641 } 642 break; 643 case SA_MODE_NOREWIND: 644 /* 645 * If we're not rewinding/unloading the tape, find out 646 * whether we need to back up over one of two filemarks 647 * we wrote (if we wrote two filemarks) so that appends 648 * from this point on will be sane. 649 */ 650 if (error == 0 && writing && (softc->quirks & SA_QUIRK_2FM)) { 651 tmp = saspace(periph, -1, SS_FILEMARKS); 652 if (tmp) { 653 xpt_print(periph->path, "unable to backspace " 654 "over one of double filemarks at end of " 655 "tape\n"); 656 xpt_print(periph->path, "it is possible that " 657 "this device needs a SA_QUIRK_1FM quirk set" 658 "for it\n"); 659 softc->flags |= SA_FLAG_TAPE_FROZEN; 660 } 661 } 662 break; 663 default: 664 xpt_print(periph->path, "unknown mode 0x%x in saclose\n", mode); 665 /* NOTREACHED */ 666 break; 667 } 668 669 /* 670 * We wish to note here that there are no more filemarks to be written. 671 */ 672 softc->filemarks = 0; 673 softc->flags &= ~SA_FLAG_TAPE_WRITTEN; 674 675 /* 676 * And we are no longer open for business. 677 */ 678 softc->flags &= ~closedbits; 679 680 /* 681 * Inform users if tape state if frozen.... 682 */ 683 if (softc->flags & SA_FLAG_TAPE_FROZEN) { 684 xpt_print(periph->path, "tape is now frozen- use an OFFLINE, " 685 "REWIND or MTEOM command to clear this state.\n"); 686 } 687 688 /* release the device if it is no longer mounted */ 689 if ((softc->flags & SA_FLAG_TAPE_MOUNTED) == 0) 690 sareservereleaseunit(periph, FALSE); 691 692 cam_periph_unhold(periph); 693 cam_periph_unlock(periph); 694 cam_periph_release(periph); 695 696 return (error); 697} 698 699/* 700 * Actually translate the requested transfer into one the physical driver 701 * can understand. The transfer is described by a buf and will include 702 * only one physical transfer. 703 */ 704static void 705sastrategy(struct bio *bp) 706{ 707 struct cam_periph *periph; 708 struct sa_softc *softc; 709 710 bp->bio_resid = bp->bio_bcount; 711 if (SA_IS_CTRL(bp->bio_dev)) { 712 biofinish(bp, NULL, EINVAL); 713 return; 714 } 715 periph = (struct cam_periph *)bp->bio_dev->si_drv1; 716 if (periph == NULL) { 717 biofinish(bp, NULL, ENXIO); 718 return; 719 } 720 cam_periph_lock(periph); 721 722 softc = (struct sa_softc *)periph->softc; 723 724 if (softc->flags & SA_FLAG_INVALID) { 725 cam_periph_unlock(periph); 726 biofinish(bp, NULL, ENXIO); 727 return; 728 } 729 730 if (softc->flags & SA_FLAG_TAPE_FROZEN) { 731 cam_periph_unlock(periph); 732 biofinish(bp, NULL, EPERM); 733 return; 734 } 735 736 /* 737 * This should actually never occur as the write(2) 738 * system call traps attempts to write to a read-only 739 * file descriptor. 740 */ 741 if (bp->bio_cmd == BIO_WRITE && softc->open_rdonly) { 742 cam_periph_unlock(periph); 743 biofinish(bp, NULL, EBADF); 744 return; 745 } 746 747 if (softc->open_pending_mount) { 748 int error = samount(periph, 0, bp->bio_dev); 749 if (error) { 750 cam_periph_unlock(periph); 751 biofinish(bp, NULL, ENXIO); 752 return; 753 } 754 saprevent(periph, PR_PREVENT); 755 softc->open_pending_mount = 0; 756 } 757 758 759 /* 760 * If it's a null transfer, return immediately 761 */ 762 if (bp->bio_bcount == 0) { 763 cam_periph_unlock(periph); 764 biodone(bp); 765 return; 766 } 767 768 /* valid request? */ 769 if (softc->flags & SA_FLAG_FIXED) { 770 /* 771 * Fixed block device. The byte count must 772 * be a multiple of our block size. 773 */ 774 if (((softc->blk_mask != ~0) && 775 ((bp->bio_bcount & softc->blk_mask) != 0)) || 776 ((softc->blk_mask == ~0) && 777 ((bp->bio_bcount % softc->min_blk) != 0))) { 778 xpt_print(periph->path, "Invalid request. Fixed block " 779 "device requests must be a multiple of %d bytes\n", 780 softc->min_blk); 781 cam_periph_unlock(periph); 782 biofinish(bp, NULL, EINVAL); 783 return; 784 } 785 } else if ((bp->bio_bcount > softc->max_blk) || 786 (bp->bio_bcount < softc->min_blk) || 787 (bp->bio_bcount & softc->blk_mask) != 0) { 788 789 xpt_print_path(periph->path); 790 printf("Invalid request. Variable block " 791 "device requests must be "); 792 if (softc->blk_mask != 0) { 793 printf("a multiple of %d ", (0x1 << softc->blk_gran)); 794 } 795 printf("between %d and %d bytes\n", softc->min_blk, 796 softc->max_blk); 797 cam_periph_unlock(periph); 798 biofinish(bp, NULL, EINVAL); 799 return; 800 } 801 802 /* 803 * Place it at the end of the queue. 804 */ 805 bioq_insert_tail(&softc->bio_queue, bp); 806 softc->queue_count++; 807#if 0 808 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 809 ("sastrategy: queuing a %ld %s byte %s\n", bp->bio_bcount, 810 (softc->flags & SA_FLAG_FIXED)? "fixed" : "variable", 811 (bp->bio_cmd == BIO_READ)? "read" : "write")); 812#endif 813 if (softc->queue_count > 1) { 814 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 815 ("sastrategy: queue count now %d\n", softc->queue_count)); 816 } 817 818 /* 819 * Schedule ourselves for performing the work. 820 */ 821 xpt_schedule(periph, CAM_PRIORITY_NORMAL); 822 cam_periph_unlock(periph); 823 824 return; 825} 826 827 828#define PENDING_MOUNT_CHECK(softc, periph, dev) \ 829 if (softc->open_pending_mount) { \ 830 error = samount(periph, 0, dev); \ 831 if (error) { \ 832 break; \ 833 } \ 834 saprevent(periph, PR_PREVENT); \ 835 softc->open_pending_mount = 0; \ 836 } 837 838static int 839saioctl(struct cdev *dev, u_long cmd, caddr_t arg, int flag, struct thread *td) 840{ 841 struct cam_periph *periph; 842 struct sa_softc *softc; 843 scsi_space_code spaceop; 844 int didlockperiph = 0; 845 int mode; 846 int error = 0; 847 848 mode = SAMODE(dev); 849 error = 0; /* shut up gcc */ 850 spaceop = 0; /* shut up gcc */ 851 852 periph = (struct cam_periph *)dev->si_drv1; 853 if (periph == NULL) 854 return (ENXIO); 855 856 cam_periph_lock(periph); 857 softc = (struct sa_softc *)periph->softc; 858 859 /* 860 * Check for control mode accesses. We allow MTIOCGET and 861 * MTIOCERRSTAT (but need to be the only one open in order 862 * to clear latched status), and MTSETBSIZE, MTSETDNSTY 863 * and MTCOMP (but need to be the only one accessing this 864 * device to run those). 865 */ 866 867 if (SA_IS_CTRL(dev)) { 868 switch (cmd) { 869 case MTIOCGETEOTMODEL: 870 case MTIOCGET: 871 break; 872 case MTIOCERRSTAT: 873 /* 874 * If the periph isn't already locked, lock it 875 * so our MTIOCERRSTAT can reset latched error stats. 876 * 877 * If the periph is already locked, skip it because 878 * we're just getting status and it'll be up to the 879 * other thread that has this device open to do 880 * an MTIOCERRSTAT that would clear latched status. 881 */ 882 if ((periph->flags & CAM_PERIPH_LOCKED) == 0) { 883 error = cam_periph_hold(periph, PRIBIO|PCATCH); 884 if (error != 0) { 885 cam_periph_unlock(periph); 886 return (error); 887 } 888 didlockperiph = 1; 889 } 890 break; 891 892 case MTIOCTOP: 893 { 894 struct mtop *mt = (struct mtop *) arg; 895 896 /* 897 * Check to make sure it's an OP we can perform 898 * with no media inserted. 899 */ 900 switch (mt->mt_op) { 901 case MTSETBSIZ: 902 case MTSETDNSTY: 903 case MTCOMP: 904 mt = NULL; 905 /* FALLTHROUGH */ 906 default: 907 break; 908 } 909 if (mt != NULL) { 910 break; 911 } 912 /* FALLTHROUGH */ 913 } 914 case MTIOCSETEOTMODEL: 915 /* 916 * We need to acquire the peripheral here rather 917 * than at open time because we are sharing writable 918 * access to data structures. 919 */ 920 error = cam_periph_hold(periph, PRIBIO|PCATCH); 921 if (error != 0) { 922 cam_periph_unlock(periph); 923 return (error); 924 } 925 didlockperiph = 1; 926 break; 927 928 default: 929 cam_periph_unlock(periph); 930 return (EINVAL); 931 } 932 } 933 934 /* 935 * Find the device that the user is talking about 936 */ 937 switch (cmd) { 938 case MTIOCGET: 939 { 940 struct mtget *g = (struct mtget *)arg; 941 942 /* 943 * If this isn't the control mode device, actually go out 944 * and ask the drive again what it's set to. 945 */ 946 if (!SA_IS_CTRL(dev) && !softc->open_pending_mount) { 947 u_int8_t write_protect; 948 int comp_enabled, comp_supported; 949 error = sagetparams(periph, SA_PARAM_ALL, 950 &softc->media_blksize, &softc->media_density, 951 &softc->media_numblks, &softc->buffer_mode, 952 &write_protect, &softc->speed, &comp_supported, 953 &comp_enabled, &softc->comp_algorithm, NULL); 954 if (error) 955 break; 956 if (write_protect) 957 softc->flags |= SA_FLAG_TAPE_WP; 958 else 959 softc->flags &= ~SA_FLAG_TAPE_WP; 960 softc->flags &= ~(SA_FLAG_COMP_SUPP| 961 SA_FLAG_COMP_ENABLED|SA_FLAG_COMP_UNSUPP); 962 if (comp_supported) { 963 if (softc->saved_comp_algorithm == 0) 964 softc->saved_comp_algorithm = 965 softc->comp_algorithm; 966 softc->flags |= SA_FLAG_COMP_SUPP; 967 if (comp_enabled) 968 softc->flags |= SA_FLAG_COMP_ENABLED; 969 } else 970 softc->flags |= SA_FLAG_COMP_UNSUPP; 971 } 972 bzero(g, sizeof(struct mtget)); 973 g->mt_type = MT_ISAR; 974 if (softc->flags & SA_FLAG_COMP_UNSUPP) { 975 g->mt_comp = MT_COMP_UNSUPP; 976 g->mt_comp0 = MT_COMP_UNSUPP; 977 g->mt_comp1 = MT_COMP_UNSUPP; 978 g->mt_comp2 = MT_COMP_UNSUPP; 979 g->mt_comp3 = MT_COMP_UNSUPP; 980 } else { 981 if ((softc->flags & SA_FLAG_COMP_ENABLED) == 0) { 982 g->mt_comp = MT_COMP_DISABLED; 983 } else { 984 g->mt_comp = softc->comp_algorithm; 985 } 986 g->mt_comp0 = softc->comp_algorithm; 987 g->mt_comp1 = softc->comp_algorithm; 988 g->mt_comp2 = softc->comp_algorithm; 989 g->mt_comp3 = softc->comp_algorithm; 990 } 991 g->mt_density = softc->media_density; 992 g->mt_density0 = softc->media_density; 993 g->mt_density1 = softc->media_density; 994 g->mt_density2 = softc->media_density; 995 g->mt_density3 = softc->media_density; 996 g->mt_blksiz = softc->media_blksize; 997 g->mt_blksiz0 = softc->media_blksize; 998 g->mt_blksiz1 = softc->media_blksize; 999 g->mt_blksiz2 = softc->media_blksize; 1000 g->mt_blksiz3 = softc->media_blksize; 1001 g->mt_fileno = softc->fileno; 1002 g->mt_blkno = softc->blkno; 1003 g->mt_dsreg = (short) softc->dsreg; 1004 /* 1005 * Yes, we know that this is likely to overflow 1006 */ 1007 if (softc->last_resid_was_io) { 1008 if ((g->mt_resid = (short) softc->last_io_resid) != 0) { 1009 if (SA_IS_CTRL(dev) == 0 || didlockperiph) { 1010 softc->last_io_resid = 0; 1011 } 1012 } 1013 } else { 1014 if ((g->mt_resid = (short)softc->last_ctl_resid) != 0) { 1015 if (SA_IS_CTRL(dev) == 0 || didlockperiph) { 1016 softc->last_ctl_resid = 0; 1017 } 1018 } 1019 } 1020 error = 0; 1021 break; 1022 } 1023 case MTIOCERRSTAT: 1024 { 1025 struct scsi_tape_errors *sep = 1026 &((union mterrstat *)arg)->scsi_errstat; 1027 1028 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, 1029 ("saioctl: MTIOCERRSTAT\n")); 1030 1031 bzero(sep, sizeof(*sep)); 1032 sep->io_resid = softc->last_io_resid; 1033 bcopy((caddr_t) &softc->last_io_sense, sep->io_sense, 1034 sizeof (sep->io_sense)); 1035 bcopy((caddr_t) &softc->last_io_cdb, sep->io_cdb, 1036 sizeof (sep->io_cdb)); 1037 sep->ctl_resid = softc->last_ctl_resid; 1038 bcopy((caddr_t) &softc->last_ctl_sense, sep->ctl_sense, 1039 sizeof (sep->ctl_sense)); 1040 bcopy((caddr_t) &softc->last_ctl_cdb, sep->ctl_cdb, 1041 sizeof (sep->ctl_cdb)); 1042 1043 if ((SA_IS_CTRL(dev) == 0 && softc->open_pending_mount) || 1044 didlockperiph) 1045 bzero((caddr_t) &softc->errinfo, 1046 sizeof (softc->errinfo)); 1047 error = 0; 1048 break; 1049 } 1050 case MTIOCTOP: 1051 { 1052 struct mtop *mt; 1053 int count; 1054 1055 PENDING_MOUNT_CHECK(softc, periph, dev); 1056 1057 mt = (struct mtop *)arg; 1058 1059 1060 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, 1061 ("saioctl: op=0x%x count=0x%x\n", 1062 mt->mt_op, mt->mt_count)); 1063 1064 count = mt->mt_count; 1065 switch (mt->mt_op) { 1066 case MTWEOF: /* write an end-of-file marker */ 1067 /* 1068 * We don't need to clear the SA_FLAG_TAPE_WRITTEN 1069 * flag because by keeping track of filemarks 1070 * we have last written we know ehether or not 1071 * we need to write more when we close the device. 1072 */ 1073 error = sawritefilemarks(periph, count, FALSE); 1074 break; 1075 case MTWSS: /* write a setmark */ 1076 error = sawritefilemarks(periph, count, TRUE); 1077 break; 1078 case MTBSR: /* backward space record */ 1079 case MTFSR: /* forward space record */ 1080 case MTBSF: /* backward space file */ 1081 case MTFSF: /* forward space file */ 1082 case MTBSS: /* backward space setmark */ 1083 case MTFSS: /* forward space setmark */ 1084 case MTEOD: /* space to end of recorded medium */ 1085 { 1086 int nmarks; 1087 1088 spaceop = SS_FILEMARKS; 1089 nmarks = softc->filemarks; 1090 error = sacheckeod(periph); 1091 if (error) { 1092 xpt_print(periph->path, 1093 "EOD check prior to spacing failed\n"); 1094 softc->flags |= SA_FLAG_EIO_PENDING; 1095 break; 1096 } 1097 nmarks -= softc->filemarks; 1098 switch(mt->mt_op) { 1099 case MTBSR: 1100 count = -count; 1101 /* FALLTHROUGH */ 1102 case MTFSR: 1103 spaceop = SS_BLOCKS; 1104 break; 1105 case MTBSF: 1106 count = -count; 1107 /* FALLTHROUGH */ 1108 case MTFSF: 1109 break; 1110 case MTBSS: 1111 count = -count; 1112 /* FALLTHROUGH */ 1113 case MTFSS: 1114 spaceop = SS_SETMARKS; 1115 break; 1116 case MTEOD: 1117 spaceop = SS_EOD; 1118 count = 0; 1119 nmarks = 0; 1120 break; 1121 default: 1122 error = EINVAL; 1123 break; 1124 } 1125 if (error) 1126 break; 1127 1128 nmarks = softc->filemarks; 1129 /* 1130 * XXX: Why are we checking again? 1131 */ 1132 error = sacheckeod(periph); 1133 if (error) 1134 break; 1135 nmarks -= softc->filemarks; 1136 error = saspace(periph, count - nmarks, spaceop); 1137 /* 1138 * At this point, clear that we've written the tape 1139 * and that we've written any filemarks. We really 1140 * don't know what the applications wishes to do next- 1141 * the sacheckeod's will make sure we terminated the 1142 * tape correctly if we'd been writing, but the next 1143 * action the user application takes will set again 1144 * whether we need to write filemarks. 1145 */ 1146 softc->flags &= 1147 ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN); 1148 softc->filemarks = 0; 1149 break; 1150 } 1151 case MTREW: /* rewind */ 1152 PENDING_MOUNT_CHECK(softc, periph, dev); 1153 (void) sacheckeod(periph); 1154 error = sarewind(periph); 1155 /* see above */ 1156 softc->flags &= 1157 ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN); 1158 softc->flags &= ~SA_FLAG_ERR_PENDING; 1159 softc->filemarks = 0; 1160 break; 1161 case MTERASE: /* erase */ 1162 PENDING_MOUNT_CHECK(softc, periph, dev); 1163 error = saerase(periph, count); 1164 softc->flags &= 1165 ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN); 1166 softc->flags &= ~SA_FLAG_ERR_PENDING; 1167 break; 1168 case MTRETENS: /* re-tension tape */ 1169 PENDING_MOUNT_CHECK(softc, periph, dev); 1170 error = saretension(periph); 1171 softc->flags &= 1172 ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN); 1173 softc->flags &= ~SA_FLAG_ERR_PENDING; 1174 break; 1175 case MTOFFL: /* rewind and put the drive offline */ 1176 1177 PENDING_MOUNT_CHECK(softc, periph, dev); 1178 1179 (void) sacheckeod(periph); 1180 /* see above */ 1181 softc->flags &= ~SA_FLAG_TAPE_WRITTEN; 1182 softc->filemarks = 0; 1183 1184 error = sarewind(periph); 1185 /* clear the frozen flag anyway */ 1186 softc->flags &= ~SA_FLAG_TAPE_FROZEN; 1187 1188 /* 1189 * Be sure to allow media removal before ejecting. 1190 */ 1191 1192 saprevent(periph, PR_ALLOW); 1193 if (error == 0) { 1194 error = saloadunload(periph, FALSE); 1195 if (error == 0) { 1196 softc->flags &= ~SA_FLAG_TAPE_MOUNTED; 1197 } 1198 } 1199 break; 1200 1201 case MTNOP: /* no operation, sets status only */ 1202 case MTCACHE: /* enable controller cache */ 1203 case MTNOCACHE: /* disable controller cache */ 1204 error = 0; 1205 break; 1206 1207 case MTSETBSIZ: /* Set block size for device */ 1208 1209 PENDING_MOUNT_CHECK(softc, periph, dev); 1210 1211 error = sasetparams(periph, SA_PARAM_BLOCKSIZE, count, 1212 0, 0, 0); 1213 if (error == 0) { 1214 softc->last_media_blksize = 1215 softc->media_blksize; 1216 softc->media_blksize = count; 1217 if (count) { 1218 softc->flags |= SA_FLAG_FIXED; 1219 if (powerof2(count)) { 1220 softc->blk_shift = 1221 ffs(count) - 1; 1222 softc->blk_mask = count - 1; 1223 } else { 1224 softc->blk_mask = ~0; 1225 softc->blk_shift = 0; 1226 } 1227 /* 1228 * Make the user's desire 'persistent'. 1229 */ 1230 softc->quirks &= ~SA_QUIRK_VARIABLE; 1231 softc->quirks |= SA_QUIRK_FIXED; 1232 } else { 1233 softc->flags &= ~SA_FLAG_FIXED; 1234 if (softc->max_blk == 0) { 1235 softc->max_blk = ~0; 1236 } 1237 softc->blk_shift = 0; 1238 if (softc->blk_gran != 0) { 1239 softc->blk_mask = 1240 softc->blk_gran - 1; 1241 } else { 1242 softc->blk_mask = 0; 1243 } 1244 /* 1245 * Make the user's desire 'persistent'. 1246 */ 1247 softc->quirks |= SA_QUIRK_VARIABLE; 1248 softc->quirks &= ~SA_QUIRK_FIXED; 1249 } 1250 } 1251 break; 1252 case MTSETDNSTY: /* Set density for device and mode */ 1253 PENDING_MOUNT_CHECK(softc, periph, dev); 1254 1255 if (count > UCHAR_MAX) { 1256 error = EINVAL; 1257 break; 1258 } else { 1259 error = sasetparams(periph, SA_PARAM_DENSITY, 1260 0, count, 0, 0); 1261 } 1262 break; 1263 case MTCOMP: /* enable compression */ 1264 PENDING_MOUNT_CHECK(softc, periph, dev); 1265 /* 1266 * Some devices don't support compression, and 1267 * don't like it if you ask them for the 1268 * compression page. 1269 */ 1270 if ((softc->quirks & SA_QUIRK_NOCOMP) || 1271 (softc->flags & SA_FLAG_COMP_UNSUPP)) { 1272 error = ENODEV; 1273 break; 1274 } 1275 error = sasetparams(periph, SA_PARAM_COMPRESSION, 1276 0, 0, count, SF_NO_PRINT); 1277 break; 1278 default: 1279 error = EINVAL; 1280 } 1281 break; 1282 } 1283 case MTIOCIEOT: 1284 case MTIOCEEOT: 1285 error = 0; 1286 break; 1287 case MTIOCRDSPOS: 1288 PENDING_MOUNT_CHECK(softc, periph, dev); 1289 error = sardpos(periph, 0, (u_int32_t *) arg); 1290 break; 1291 case MTIOCRDHPOS: 1292 PENDING_MOUNT_CHECK(softc, periph, dev); 1293 error = sardpos(periph, 1, (u_int32_t *) arg); 1294 break; 1295 case MTIOCSLOCATE: 1296 PENDING_MOUNT_CHECK(softc, periph, dev); 1297 error = sasetpos(periph, 0, (u_int32_t *) arg); 1298 break; 1299 case MTIOCHLOCATE: 1300 PENDING_MOUNT_CHECK(softc, periph, dev); 1301 error = sasetpos(periph, 1, (u_int32_t *) arg); 1302 break; 1303 case MTIOCGETEOTMODEL: 1304 error = 0; 1305 if (softc->quirks & SA_QUIRK_1FM) 1306 mode = 1; 1307 else 1308 mode = 2; 1309 *((u_int32_t *) arg) = mode; 1310 break; 1311 case MTIOCSETEOTMODEL: 1312 error = 0; 1313 switch (*((u_int32_t *) arg)) { 1314 case 1: 1315 softc->quirks &= ~SA_QUIRK_2FM; 1316 softc->quirks |= SA_QUIRK_1FM; 1317 break; 1318 case 2: 1319 softc->quirks &= ~SA_QUIRK_1FM; 1320 softc->quirks |= SA_QUIRK_2FM; 1321 break; 1322 default: 1323 error = EINVAL; 1324 break; 1325 } 1326 break; 1327 default: 1328 error = cam_periph_ioctl(periph, cmd, arg, saerror); 1329 break; 1330 } 1331 1332 /* 1333 * Check to see if we cleared a frozen state 1334 */ 1335 if (error == 0 && (softc->flags & SA_FLAG_TAPE_FROZEN)) { 1336 switch(cmd) { 1337 case MTIOCRDSPOS: 1338 case MTIOCRDHPOS: 1339 case MTIOCSLOCATE: 1340 case MTIOCHLOCATE: 1341 softc->fileno = (daddr_t) -1; 1342 softc->blkno = (daddr_t) -1; 1343 softc->flags &= ~SA_FLAG_TAPE_FROZEN; 1344 xpt_print(periph->path, 1345 "tape state now unfrozen.\n"); 1346 break; 1347 default: 1348 break; 1349 } 1350 } 1351 if (didlockperiph) { 1352 cam_periph_unhold(periph); 1353 } 1354 cam_periph_unlock(periph); 1355 return (error); 1356} 1357 1358static void 1359sainit(void) 1360{ 1361 cam_status status; 1362 1363 /* 1364 * Install a global async callback. 1365 */ 1366 status = xpt_register_async(AC_FOUND_DEVICE, saasync, NULL, NULL); 1367 1368 if (status != CAM_REQ_CMP) { 1369 printf("sa: Failed to attach master async callback " 1370 "due to status 0x%x!\n", status); 1371 } 1372} 1373 1374static void 1375saoninvalidate(struct cam_periph *periph) 1376{ 1377 struct sa_softc *softc; 1378 1379 softc = (struct sa_softc *)periph->softc; 1380 1381 /* 1382 * De-register any async callbacks. 1383 */ 1384 xpt_register_async(0, saasync, periph, periph->path); 1385 1386 softc->flags |= SA_FLAG_INVALID; 1387 1388 /* 1389 * Return all queued I/O with ENXIO. 1390 * XXX Handle any transactions queued to the card 1391 * with XPT_ABORT_CCB. 1392 */ 1393 bioq_flush(&softc->bio_queue, NULL, ENXIO); 1394 softc->queue_count = 0; 1395} 1396 1397static void 1398sacleanup(struct cam_periph *periph) 1399{ 1400 struct sa_softc *softc; 1401 int i; 1402 1403 softc = (struct sa_softc *)periph->softc; 1404 1405 devstat_remove_entry(softc->device_stats); 1406 cam_periph_unlock(periph); 1407 destroy_dev(softc->devs.ctl_dev); 1408 for (i = 0; i < SA_NUM_MODES; i++) { 1409 destroy_dev(softc->devs.mode_devs[i].r_dev); 1410 destroy_dev(softc->devs.mode_devs[i].nr_dev); 1411 destroy_dev(softc->devs.mode_devs[i].er_dev); 1412 } 1413 cam_periph_lock(periph); 1414 free(softc, M_SCSISA); 1415} 1416 1417static void 1418saasync(void *callback_arg, u_int32_t code, 1419 struct cam_path *path, void *arg) 1420{ 1421 struct cam_periph *periph; 1422 1423 periph = (struct cam_periph *)callback_arg; 1424 switch (code) { 1425 case AC_FOUND_DEVICE: 1426 { 1427 struct ccb_getdev *cgd; 1428 cam_status status; 1429 1430 cgd = (struct ccb_getdev *)arg; 1431 if (cgd == NULL) 1432 break; 1433 1434 if (cgd->protocol != PROTO_SCSI) 1435 break; 1436 1437 if (SID_TYPE(&cgd->inq_data) != T_SEQUENTIAL) 1438 break; 1439 1440 /* 1441 * Allocate a peripheral instance for 1442 * this device and start the probe 1443 * process. 1444 */ 1445 status = cam_periph_alloc(saregister, saoninvalidate, 1446 sacleanup, sastart, 1447 "sa", CAM_PERIPH_BIO, path, 1448 saasync, AC_FOUND_DEVICE, cgd); 1449 1450 if (status != CAM_REQ_CMP 1451 && status != CAM_REQ_INPROG) 1452 printf("saasync: Unable to probe new device " 1453 "due to status 0x%x\n", status); 1454 break; 1455 } 1456 default: 1457 cam_periph_async(periph, code, path, arg); 1458 break; 1459 } 1460} 1461 1462static void 1463sasysctlinit(void *context, int pending) 1464{ 1465 struct cam_periph *periph; 1466 struct sa_softc *softc; 1467 char tmpstr[80], tmpstr2[80]; 1468 1469 periph = (struct cam_periph *)context; 1470 /* 1471 * If the periph is invalid, no need to setup the sysctls. 1472 */ 1473 if (periph->flags & CAM_PERIPH_INVALID) 1474 goto bailout; 1475 1476 softc = (struct sa_softc *)periph->softc; 1477 1478 snprintf(tmpstr, sizeof(tmpstr), "CAM SA unit %d", periph->unit_number); 1479 snprintf(tmpstr2, sizeof(tmpstr2), "%u", periph->unit_number); 1480 1481 sysctl_ctx_init(&softc->sysctl_ctx); 1482 softc->sysctl_tree = SYSCTL_ADD_NODE(&softc->sysctl_ctx, 1483 SYSCTL_STATIC_CHILDREN(_kern_cam_sa), OID_AUTO, tmpstr2, 1484 CTLFLAG_RD, 0, tmpstr); 1485 if (softc->sysctl_tree == NULL) 1486 goto bailout; 1487 1488 SYSCTL_ADD_INT(&softc->sysctl_ctx, SYSCTL_CHILDREN(softc->sysctl_tree), 1489 OID_AUTO, "allow_io_split", CTLFLAG_RDTUN | CTLFLAG_NOFETCH, 1490 &softc->allow_io_split, 0, "Allow Splitting I/O"); 1491 SYSCTL_ADD_INT(&softc->sysctl_ctx, SYSCTL_CHILDREN(softc->sysctl_tree), 1492 OID_AUTO, "maxio", CTLFLAG_RD, 1493 &softc->maxio, 0, "Maximum I/O size"); 1494 SYSCTL_ADD_INT(&softc->sysctl_ctx, SYSCTL_CHILDREN(softc->sysctl_tree), 1495 OID_AUTO, "cpi_maxio", CTLFLAG_RD, 1496 &softc->cpi_maxio, 0, "Maximum Controller I/O size"); 1497 1498bailout: 1499 /* 1500 * Release the reference that was held when this task was enqueued. 1501 */ 1502 cam_periph_release(periph); 1503} 1504 1505static cam_status 1506saregister(struct cam_periph *periph, void *arg) 1507{ 1508 struct sa_softc *softc; 1509 struct ccb_getdev *cgd; 1510 struct ccb_pathinq cpi; 1511 caddr_t match; 1512 char tmpstr[80]; 1513 int i; 1514 1515 cgd = (struct ccb_getdev *)arg; 1516 if (cgd == NULL) { 1517 printf("saregister: no getdev CCB, can't register device\n"); 1518 return (CAM_REQ_CMP_ERR); 1519 } 1520 1521 softc = (struct sa_softc *) 1522 malloc(sizeof (*softc), M_SCSISA, M_NOWAIT | M_ZERO); 1523 if (softc == NULL) { 1524 printf("saregister: Unable to probe new device. " 1525 "Unable to allocate softc\n"); 1526 return (CAM_REQ_CMP_ERR); 1527 } 1528 softc->scsi_rev = SID_ANSI_REV(&cgd->inq_data); 1529 softc->state = SA_STATE_NORMAL; 1530 softc->fileno = (daddr_t) -1; 1531 softc->blkno = (daddr_t) -1; 1532 1533 bioq_init(&softc->bio_queue); 1534 periph->softc = softc; 1535 1536 /* 1537 * See if this device has any quirks. 1538 */ 1539 match = cam_quirkmatch((caddr_t)&cgd->inq_data, 1540 (caddr_t)sa_quirk_table, 1541 sizeof(sa_quirk_table)/sizeof(*sa_quirk_table), 1542 sizeof(*sa_quirk_table), scsi_inquiry_match); 1543 1544 if (match != NULL) { 1545 softc->quirks = ((struct sa_quirk_entry *)match)->quirks; 1546 softc->last_media_blksize = 1547 ((struct sa_quirk_entry *)match)->prefblk; 1548 } else 1549 softc->quirks = SA_QUIRK_NONE; 1550 1551 bzero(&cpi, sizeof(cpi)); 1552 xpt_setup_ccb(&cpi.ccb_h, periph->path, CAM_PRIORITY_NORMAL); 1553 cpi.ccb_h.func_code = XPT_PATH_INQ; 1554 xpt_action((union ccb *)&cpi); 1555 1556 /* 1557 * The SA driver supports a blocksize, but we don't know the 1558 * blocksize until we media is inserted. So, set a flag to 1559 * indicate that the blocksize is unavailable right now. 1560 */ 1561 cam_periph_unlock(periph); 1562 softc->device_stats = devstat_new_entry("sa", periph->unit_number, 0, 1563 DEVSTAT_BS_UNAVAILABLE, SID_TYPE(&cgd->inq_data) | 1564 XPORT_DEVSTAT_TYPE(cpi.transport), DEVSTAT_PRIORITY_TAPE); 1565 1566 /* 1567 * Load the default value that is either compiled in, or loaded 1568 * in the global kern.cam.sa.allow_io_split tunable. 1569 */ 1570 softc->allow_io_split = sa_allow_io_split; 1571 1572 /* 1573 * Load a per-instance tunable, if it exists. NOTE that this 1574 * tunable WILL GO AWAY in FreeBSD 11.0. 1575 */ 1576 snprintf(tmpstr, sizeof(tmpstr), "kern.cam.sa.%u.allow_io_split", 1577 periph->unit_number); 1578 TUNABLE_INT_FETCH(tmpstr, &softc->allow_io_split); 1579 1580 /* 1581 * If maxio isn't set, we fall back to DFLTPHYS. Otherwise we take 1582 * the smaller of cpi.maxio or MAXPHYS. 1583 */ 1584 if (cpi.maxio == 0) 1585 softc->maxio = DFLTPHYS; 1586 else if (cpi.maxio > MAXPHYS) 1587 softc->maxio = MAXPHYS; 1588 else 1589 softc->maxio = cpi.maxio; 1590 1591 /* 1592 * Record the controller's maximum I/O size so we can report it to 1593 * the user later. 1594 */ 1595 softc->cpi_maxio = cpi.maxio; 1596 1597 /* 1598 * By default we tell physio that we do not want our I/O split. 1599 * The user needs to have a 1:1 mapping between the size of his 1600 * write to a tape character device and the size of the write 1601 * that actually goes down to the drive. 1602 */ 1603 if (softc->allow_io_split == 0) 1604 softc->si_flags = SI_NOSPLIT; 1605 else 1606 softc->si_flags = 0; 1607 1608 TASK_INIT(&softc->sysctl_task, 0, sasysctlinit, periph); 1609 1610 /* 1611 * If the SIM supports unmapped I/O, let physio know that we can 1612 * handle unmapped buffers. 1613 */ 1614 if (cpi.hba_misc & PIM_UNMAPPED) 1615 softc->si_flags |= SI_UNMAPPED; 1616 1617 softc->devs.ctl_dev = make_dev(&sa_cdevsw, SAMINOR(SA_CTLDEV, 1618 0, SA_ATYPE_R), UID_ROOT, GID_OPERATOR, 1619 0660, "%s%d.ctl", periph->periph_name, periph->unit_number); 1620 softc->devs.ctl_dev->si_drv1 = periph; 1621 softc->devs.ctl_dev->si_iosize_max = softc->maxio; 1622 softc->devs.ctl_dev->si_flags |= softc->si_flags; 1623 1624 for (i = 0; i < SA_NUM_MODES; i++) { 1625 1626 softc->devs.mode_devs[i].r_dev = make_dev(&sa_cdevsw, 1627 SAMINOR(SA_NOT_CTLDEV, i, SA_ATYPE_R), 1628 UID_ROOT, GID_OPERATOR, 0660, "%s%d.%d", 1629 periph->periph_name, periph->unit_number, i); 1630 softc->devs.mode_devs[i].r_dev->si_drv1 = periph; 1631 softc->devs.mode_devs[i].r_dev->si_iosize_max = softc->maxio; 1632 softc->devs.mode_devs[i].r_dev->si_flags |= softc->si_flags; 1633 1634 softc->devs.mode_devs[i].nr_dev = make_dev(&sa_cdevsw, 1635 SAMINOR(SA_NOT_CTLDEV, i, SA_ATYPE_NR), 1636 UID_ROOT, GID_OPERATOR, 0660, "n%s%d.%d", 1637 periph->periph_name, periph->unit_number, i); 1638 softc->devs.mode_devs[i].nr_dev->si_drv1 = periph; 1639 softc->devs.mode_devs[i].nr_dev->si_iosize_max = softc->maxio; 1640 softc->devs.mode_devs[i].nr_dev->si_flags |= softc->si_flags; 1641 1642 softc->devs.mode_devs[i].er_dev = make_dev(&sa_cdevsw, 1643 SAMINOR(SA_NOT_CTLDEV, i, SA_ATYPE_ER), 1644 UID_ROOT, GID_OPERATOR, 0660, "e%s%d.%d", 1645 periph->periph_name, periph->unit_number, i); 1646 softc->devs.mode_devs[i].er_dev->si_drv1 = periph; 1647 softc->devs.mode_devs[i].er_dev->si_iosize_max = softc->maxio; 1648 softc->devs.mode_devs[i].er_dev->si_flags |= softc->si_flags; 1649 1650 /* 1651 * Make the (well known) aliases for the first mode. 1652 */ 1653 if (i == 0) { 1654 struct cdev *alias; 1655 1656 alias = make_dev_alias(softc->devs.mode_devs[i].r_dev, 1657 "%s%d", periph->periph_name, periph->unit_number); 1658 alias->si_drv1 = periph; 1659 alias->si_iosize_max = softc->maxio; 1660 alias->si_flags |= softc->si_flags; 1661 1662 alias = make_dev_alias(softc->devs.mode_devs[i].nr_dev, 1663 "n%s%d", periph->periph_name, periph->unit_number); 1664 alias->si_drv1 = periph; 1665 alias->si_iosize_max = softc->maxio; 1666 alias->si_flags |= softc->si_flags; 1667 1668 alias = make_dev_alias(softc->devs.mode_devs[i].er_dev, 1669 "e%s%d", periph->periph_name, periph->unit_number); 1670 alias->si_drv1 = periph; 1671 alias->si_iosize_max = softc->maxio; 1672 alias->si_flags |= softc->si_flags; 1673 } 1674 } 1675 cam_periph_lock(periph); 1676 1677 /* 1678 * Bump the peripheral refcount for the sysctl thread, in case we 1679 * get invalidated before the thread has a chance to run. 1680 */ 1681 cam_periph_acquire(periph); 1682 taskqueue_enqueue(taskqueue_thread, &softc->sysctl_task); 1683 1684 /* 1685 * Add an async callback so that we get 1686 * notified if this device goes away. 1687 */ 1688 xpt_register_async(AC_LOST_DEVICE, saasync, periph, periph->path); 1689 1690 xpt_announce_periph(periph, NULL); 1691 xpt_announce_quirks(periph, softc->quirks, SA_QUIRK_BIT_STRING); 1692 1693 return (CAM_REQ_CMP); 1694} 1695 1696static void 1697sastart(struct cam_periph *periph, union ccb *start_ccb) 1698{ 1699 struct sa_softc *softc; 1700 1701 softc = (struct sa_softc *)periph->softc; 1702 1703 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("sastart\n")); 1704 1705 1706 switch (softc->state) { 1707 case SA_STATE_NORMAL: 1708 { 1709 /* Pull a buffer from the queue and get going on it */ 1710 struct bio *bp; 1711 1712 /* 1713 * See if there is a buf with work for us to do.. 1714 */ 1715 bp = bioq_first(&softc->bio_queue); 1716 if (bp == NULL) { 1717 xpt_release_ccb(start_ccb); 1718 } else if ((softc->flags & SA_FLAG_ERR_PENDING) != 0) { 1719 struct bio *done_bp; 1720again: 1721 softc->queue_count--; 1722 bioq_remove(&softc->bio_queue, bp); 1723 bp->bio_resid = bp->bio_bcount; 1724 done_bp = bp; 1725 if ((softc->flags & SA_FLAG_EOM_PENDING) != 0) { 1726 /* 1727 * We now just clear errors in this case 1728 * and let the residual be the notifier. 1729 */ 1730 bp->bio_error = 0; 1731 } else if ((softc->flags & SA_FLAG_EOF_PENDING) != 0) { 1732 /* 1733 * This can only happen if we're reading 1734 * in fixed length mode. In this case, 1735 * we dump the rest of the list the 1736 * same way. 1737 */ 1738 bp->bio_error = 0; 1739 if (bioq_first(&softc->bio_queue) != NULL) { 1740 biodone(done_bp); 1741 goto again; 1742 } 1743 } else if ((softc->flags & SA_FLAG_EIO_PENDING) != 0) { 1744 bp->bio_error = EIO; 1745 bp->bio_flags |= BIO_ERROR; 1746 } 1747 bp = bioq_first(&softc->bio_queue); 1748 /* 1749 * Only if we have no other buffers queued up 1750 * do we clear the pending error flag. 1751 */ 1752 if (bp == NULL) 1753 softc->flags &= ~SA_FLAG_ERR_PENDING; 1754 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 1755 ("sastart- ERR_PENDING now 0x%x, bp is %sNULL, " 1756 "%d more buffers queued up\n", 1757 (softc->flags & SA_FLAG_ERR_PENDING), 1758 (bp != NULL)? "not " : " ", softc->queue_count)); 1759 xpt_release_ccb(start_ccb); 1760 biodone(done_bp); 1761 } else { 1762 u_int32_t length; 1763 1764 bioq_remove(&softc->bio_queue, bp); 1765 softc->queue_count--; 1766 1767 if ((softc->flags & SA_FLAG_FIXED) != 0) { 1768 if (softc->blk_shift != 0) { 1769 length = 1770 bp->bio_bcount >> softc->blk_shift; 1771 } else if (softc->media_blksize != 0) { 1772 length = bp->bio_bcount / 1773 softc->media_blksize; 1774 } else { 1775 bp->bio_error = EIO; 1776 xpt_print(periph->path, "zero blocksize" 1777 " for FIXED length writes?\n"); 1778 biodone(bp); 1779 break; 1780 } 1781#if 0 1782 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_INFO, 1783 ("issuing a %d fixed record %s\n", 1784 length, (bp->bio_cmd == BIO_READ)? "read" : 1785 "write")); 1786#endif 1787 } else { 1788 length = bp->bio_bcount; 1789#if 0 1790 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_INFO, 1791 ("issuing a %d variable byte %s\n", 1792 length, (bp->bio_cmd == BIO_READ)? "read" : 1793 "write")); 1794#endif 1795 } 1796 devstat_start_transaction_bio(softc->device_stats, bp); 1797 /* 1798 * Some people have theorized that we should 1799 * suppress illegal length indication if we are 1800 * running in variable block mode so that we don't 1801 * have to request sense every time our requested 1802 * block size is larger than the written block. 1803 * The residual information from the ccb allows 1804 * us to identify this situation anyway. The only 1805 * problem with this is that we will not get 1806 * information about blocks that are larger than 1807 * our read buffer unless we set the block size 1808 * in the mode page to something other than 0. 1809 * 1810 * I believe that this is a non-issue. If user apps 1811 * don't adjust their read size to match our record 1812 * size, that's just life. Anyway, the typical usage 1813 * would be to issue, e.g., 64KB reads and occasionally 1814 * have to do deal with 512 byte or 1KB intermediate 1815 * records. 1816 */ 1817 softc->dsreg = (bp->bio_cmd == BIO_READ)? 1818 MTIO_DSREG_RD : MTIO_DSREG_WR; 1819 scsi_sa_read_write(&start_ccb->csio, 0, sadone, 1820 MSG_SIMPLE_Q_TAG, (bp->bio_cmd == BIO_READ ? 1821 SCSI_RW_READ : SCSI_RW_WRITE) | 1822 ((bp->bio_flags & BIO_UNMAPPED) != 0 ? 1823 SCSI_RW_BIO : 0), FALSE, 1824 (softc->flags & SA_FLAG_FIXED) != 0, length, 1825 (bp->bio_flags & BIO_UNMAPPED) != 0 ? (void *)bp : 1826 bp->bio_data, bp->bio_bcount, SSD_FULL_SIZE, 1827 IO_TIMEOUT); 1828 start_ccb->ccb_h.ccb_pflags &= ~SA_POSITION_UPDATED; 1829 start_ccb->ccb_h.ccb_bp = bp; 1830 bp = bioq_first(&softc->bio_queue); 1831 xpt_action(start_ccb); 1832 } 1833 1834 if (bp != NULL) { 1835 /* Have more work to do, so ensure we stay scheduled */ 1836 xpt_schedule(periph, CAM_PRIORITY_NORMAL); 1837 } 1838 break; 1839 } 1840 case SA_STATE_ABNORMAL: 1841 default: 1842 panic("state 0x%x in sastart", softc->state); 1843 break; 1844 } 1845} 1846 1847 1848static void 1849sadone(struct cam_periph *periph, union ccb *done_ccb) 1850{ 1851 struct sa_softc *softc; 1852 struct ccb_scsiio *csio; 1853 struct bio *bp; 1854 int error; 1855 1856 softc = (struct sa_softc *)periph->softc; 1857 csio = &done_ccb->csio; 1858 1859 softc->dsreg = MTIO_DSREG_REST; 1860 bp = (struct bio *)done_ccb->ccb_h.ccb_bp; 1861 error = 0; 1862 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 1863 if ((error = saerror(done_ccb, 0, 0)) == ERESTART) { 1864 /* 1865 * A retry was scheduled, so just return. 1866 */ 1867 return; 1868 } 1869 } 1870 1871 if (error == EIO) { 1872 1873 /* 1874 * Catastrophic error. Mark the tape as frozen 1875 * (we no longer know tape position). 1876 * 1877 * Return all queued I/O with EIO, and unfreeze 1878 * our queue so that future transactions that 1879 * attempt to fix this problem can get to the 1880 * device. 1881 * 1882 */ 1883 1884 softc->flags |= SA_FLAG_TAPE_FROZEN; 1885 bioq_flush(&softc->bio_queue, NULL, EIO); 1886 } 1887 if (error != 0) { 1888 bp->bio_resid = bp->bio_bcount; 1889 bp->bio_error = error; 1890 bp->bio_flags |= BIO_ERROR; 1891 /* 1892 * In the error case, position is updated in saerror. 1893 */ 1894 } else { 1895 bp->bio_resid = csio->resid; 1896 bp->bio_error = 0; 1897 if (csio->resid != 0) { 1898 bp->bio_flags |= BIO_ERROR; 1899 } 1900 if (bp->bio_cmd == BIO_WRITE) { 1901 softc->flags |= SA_FLAG_TAPE_WRITTEN; 1902 softc->filemarks = 0; 1903 } 1904 if (!(csio->ccb_h.ccb_pflags & SA_POSITION_UPDATED) && 1905 (softc->blkno != (daddr_t) -1)) { 1906 if ((softc->flags & SA_FLAG_FIXED) != 0) { 1907 u_int32_t l; 1908 if (softc->blk_shift != 0) { 1909 l = bp->bio_bcount >> 1910 softc->blk_shift; 1911 } else { 1912 l = bp->bio_bcount / 1913 softc->media_blksize; 1914 } 1915 softc->blkno += (daddr_t) l; 1916 } else { 1917 softc->blkno++; 1918 } 1919 } 1920 } 1921 /* 1922 * If we had an error (immediate or pending), 1923 * release the device queue now. 1924 */ 1925 if (error || (softc->flags & SA_FLAG_ERR_PENDING)) 1926 cam_release_devq(done_ccb->ccb_h.path, 0, 0, 0, 0); 1927 if (error || bp->bio_resid) { 1928 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 1929 ("error %d resid %ld count %ld\n", error, 1930 bp->bio_resid, bp->bio_bcount)); 1931 } 1932 biofinish(bp, softc->device_stats, 0); 1933 xpt_release_ccb(done_ccb); 1934} 1935 1936/* 1937 * Mount the tape (make sure it's ready for I/O). 1938 */ 1939static int 1940samount(struct cam_periph *periph, int oflags, struct cdev *dev) 1941{ 1942 struct sa_softc *softc; 1943 union ccb *ccb; 1944 int error; 1945 1946 /* 1947 * oflags can be checked for 'kind' of open (read-only check) - later 1948 * dev can be checked for a control-mode or compression open - later 1949 */ 1950 UNUSED_PARAMETER(oflags); 1951 UNUSED_PARAMETER(dev); 1952 1953 1954 softc = (struct sa_softc *)periph->softc; 1955 1956 /* 1957 * This should determine if something has happend since the last 1958 * open/mount that would invalidate the mount. We do *not* want 1959 * to retry this command- we just want the status. But we only 1960 * do this if we're mounted already- if we're not mounted, 1961 * we don't care about the unit read state and can instead use 1962 * this opportunity to attempt to reserve the tape unit. 1963 */ 1964 1965 if (softc->flags & SA_FLAG_TAPE_MOUNTED) { 1966 ccb = cam_periph_getccb(periph, 1); 1967 scsi_test_unit_ready(&ccb->csio, 0, sadone, 1968 MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT); 1969 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT, 1970 softc->device_stats); 1971 if (error == ENXIO) { 1972 softc->flags &= ~SA_FLAG_TAPE_MOUNTED; 1973 scsi_test_unit_ready(&ccb->csio, 0, sadone, 1974 MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT); 1975 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT, 1976 softc->device_stats); 1977 } else if (error) { 1978 /* 1979 * We don't need to freeze the tape because we 1980 * will now attempt to rewind/load it. 1981 */ 1982 softc->flags &= ~SA_FLAG_TAPE_MOUNTED; 1983 if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) { 1984 xpt_print(periph->path, 1985 "error %d on TUR in samount\n", error); 1986 } 1987 } 1988 } else { 1989 error = sareservereleaseunit(periph, TRUE); 1990 if (error) { 1991 return (error); 1992 } 1993 ccb = cam_periph_getccb(periph, 1); 1994 scsi_test_unit_ready(&ccb->csio, 0, sadone, 1995 MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT); 1996 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT, 1997 softc->device_stats); 1998 } 1999 2000 if ((softc->flags & SA_FLAG_TAPE_MOUNTED) == 0) { 2001 struct scsi_read_block_limits_data *rblim = NULL; 2002 int comp_enabled, comp_supported; 2003 u_int8_t write_protect, guessing = 0; 2004 2005 /* 2006 * Clear out old state. 2007 */ 2008 softc->flags &= ~(SA_FLAG_TAPE_WP|SA_FLAG_TAPE_WRITTEN| 2009 SA_FLAG_ERR_PENDING|SA_FLAG_COMP_ENABLED| 2010 SA_FLAG_COMP_SUPP|SA_FLAG_COMP_UNSUPP); 2011 softc->filemarks = 0; 2012 2013 /* 2014 * *Very* first off, make sure we're loaded to BOT. 2015 */ 2016 scsi_load_unload(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, FALSE, 2017 FALSE, FALSE, 1, SSD_FULL_SIZE, REWIND_TIMEOUT); 2018 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT, 2019 softc->device_stats); 2020 2021 /* 2022 * In case this doesn't work, do a REWIND instead 2023 */ 2024 if (error) { 2025 scsi_rewind(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, 2026 FALSE, SSD_FULL_SIZE, REWIND_TIMEOUT); 2027 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT, 2028 softc->device_stats); 2029 } 2030 if (error) { 2031 xpt_release_ccb(ccb); 2032 goto exit; 2033 } 2034 2035 /* 2036 * Do a dummy test read to force access to the 2037 * media so that the drive will really know what's 2038 * there. We actually don't really care what the 2039 * blocksize on tape is and don't expect to really 2040 * read a full record. 2041 */ 2042 rblim = (struct scsi_read_block_limits_data *) 2043 malloc(8192, M_SCSISA, M_NOWAIT); 2044 if (rblim == NULL) { 2045 xpt_print(periph->path, "no memory for test read\n"); 2046 xpt_release_ccb(ccb); 2047 error = ENOMEM; 2048 goto exit; 2049 } 2050 2051 if ((softc->quirks & SA_QUIRK_NODREAD) == 0) { 2052 scsi_sa_read_write(&ccb->csio, 0, sadone, 2053 MSG_SIMPLE_Q_TAG, 1, FALSE, 0, 8192, 2054 (void *) rblim, 8192, SSD_FULL_SIZE, 2055 IO_TIMEOUT); 2056 (void) cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT, 2057 softc->device_stats); 2058 scsi_rewind(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG, 2059 FALSE, SSD_FULL_SIZE, REWIND_TIMEOUT); 2060 error = cam_periph_runccb(ccb, saerror, CAM_RETRY_SELTO, 2061 SF_NO_PRINT | SF_RETRY_UA, 2062 softc->device_stats); 2063 if (error) { 2064 xpt_print(periph->path, 2065 "unable to rewind after test read\n"); 2066 xpt_release_ccb(ccb); 2067 goto exit; 2068 } 2069 } 2070 2071 /* 2072 * Next off, determine block limits. 2073 */ 2074 scsi_read_block_limits(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, 2075 rblim, SSD_FULL_SIZE, SCSIOP_TIMEOUT); 2076 2077 error = cam_periph_runccb(ccb, saerror, CAM_RETRY_SELTO, 2078 SF_NO_PRINT | SF_RETRY_UA, softc->device_stats); 2079 2080 xpt_release_ccb(ccb); 2081 2082 if (error != 0) { 2083 /* 2084 * If it's less than SCSI-2, READ BLOCK LIMITS is not 2085 * a MANDATORY command. Anyway- it doesn't matter- 2086 * we can proceed anyway. 2087 */ 2088 softc->blk_gran = 0; 2089 softc->max_blk = ~0; 2090 softc->min_blk = 0; 2091 } else { 2092 if (softc->scsi_rev >= SCSI_REV_SPC) { 2093 softc->blk_gran = RBL_GRAN(rblim); 2094 } else { 2095 softc->blk_gran = 0; 2096 } 2097 /* 2098 * We take max_blk == min_blk to mean a default to 2099 * fixed mode- but note that whatever we get out of 2100 * sagetparams below will actually determine whether 2101 * we are actually *in* fixed mode. 2102 */ 2103 softc->max_blk = scsi_3btoul(rblim->maximum); 2104 softc->min_blk = scsi_2btoul(rblim->minimum); 2105 2106 2107 } 2108 /* 2109 * Next, perform a mode sense to determine 2110 * current density, blocksize, compression etc. 2111 */ 2112 error = sagetparams(periph, SA_PARAM_ALL, 2113 &softc->media_blksize, 2114 &softc->media_density, 2115 &softc->media_numblks, 2116 &softc->buffer_mode, &write_protect, 2117 &softc->speed, &comp_supported, 2118 &comp_enabled, &softc->comp_algorithm, 2119 NULL); 2120 2121 if (error != 0) { 2122 /* 2123 * We could work a little harder here. We could 2124 * adjust our attempts to get information. It 2125 * might be an ancient tape drive. If someone 2126 * nudges us, we'll do that. 2127 */ 2128 goto exit; 2129 } 2130 2131 /* 2132 * If no quirk has determined that this is a device that is 2133 * preferred to be in fixed or variable mode, now is the time 2134 * to find out. 2135 */ 2136 if ((softc->quirks & (SA_QUIRK_FIXED|SA_QUIRK_VARIABLE)) == 0) { 2137 guessing = 1; 2138 /* 2139 * This could be expensive to find out. Luckily we 2140 * only need to do this once. If we start out in 2141 * 'default' mode, try and set ourselves to one 2142 * of the densities that would determine a wad 2143 * of other stuff. Go from highest to lowest. 2144 */ 2145 if (softc->media_density == SCSI_DEFAULT_DENSITY) { 2146 int i; 2147 static u_int8_t ctry[] = { 2148 SCSI_DENSITY_HALFINCH_PE, 2149 SCSI_DENSITY_HALFINCH_6250C, 2150 SCSI_DENSITY_HALFINCH_6250, 2151 SCSI_DENSITY_HALFINCH_1600, 2152 SCSI_DENSITY_HALFINCH_800, 2153 SCSI_DENSITY_QIC_4GB, 2154 SCSI_DENSITY_QIC_2GB, 2155 SCSI_DENSITY_QIC_525_320, 2156 SCSI_DENSITY_QIC_150, 2157 SCSI_DENSITY_QIC_120, 2158 SCSI_DENSITY_QIC_24, 2159 SCSI_DENSITY_QIC_11_9TRK, 2160 SCSI_DENSITY_QIC_11_4TRK, 2161 SCSI_DENSITY_QIC_1320, 2162 SCSI_DENSITY_QIC_3080, 2163 0 2164 }; 2165 for (i = 0; ctry[i]; i++) { 2166 error = sasetparams(periph, 2167 SA_PARAM_DENSITY, 0, ctry[i], 2168 0, SF_NO_PRINT); 2169 if (error == 0) { 2170 softc->media_density = ctry[i]; 2171 break; 2172 } 2173 } 2174 } 2175 switch (softc->media_density) { 2176 case SCSI_DENSITY_QIC_11_4TRK: 2177 case SCSI_DENSITY_QIC_11_9TRK: 2178 case SCSI_DENSITY_QIC_24: 2179 case SCSI_DENSITY_QIC_120: 2180 case SCSI_DENSITY_QIC_150: 2181 case SCSI_DENSITY_QIC_525_320: 2182 case SCSI_DENSITY_QIC_1320: 2183 case SCSI_DENSITY_QIC_3080: 2184 softc->quirks &= ~SA_QUIRK_2FM; 2185 softc->quirks |= SA_QUIRK_FIXED|SA_QUIRK_1FM; 2186 softc->last_media_blksize = 512; 2187 break; 2188 case SCSI_DENSITY_QIC_4GB: 2189 case SCSI_DENSITY_QIC_2GB: 2190 softc->quirks &= ~SA_QUIRK_2FM; 2191 softc->quirks |= SA_QUIRK_FIXED|SA_QUIRK_1FM; 2192 softc->last_media_blksize = 1024; 2193 break; 2194 default: 2195 softc->last_media_blksize = 2196 softc->media_blksize; 2197 softc->quirks |= SA_QUIRK_VARIABLE; 2198 break; 2199 } 2200 } 2201 2202 /* 2203 * If no quirk has determined that this is a device that needs 2204 * to have 2 Filemarks at EOD, now is the time to find out. 2205 */ 2206 2207 if ((softc->quirks & SA_QUIRK_2FM) == 0) { 2208 switch (softc->media_density) { 2209 case SCSI_DENSITY_HALFINCH_800: 2210 case SCSI_DENSITY_HALFINCH_1600: 2211 case SCSI_DENSITY_HALFINCH_6250: 2212 case SCSI_DENSITY_HALFINCH_6250C: 2213 case SCSI_DENSITY_HALFINCH_PE: 2214 softc->quirks &= ~SA_QUIRK_1FM; 2215 softc->quirks |= SA_QUIRK_2FM; 2216 break; 2217 default: 2218 break; 2219 } 2220 } 2221 2222 /* 2223 * Now validate that some info we got makes sense. 2224 */ 2225 if ((softc->max_blk < softc->media_blksize) || 2226 (softc->min_blk > softc->media_blksize && 2227 softc->media_blksize)) { 2228 xpt_print(periph->path, 2229 "BLOCK LIMITS (%d..%d) could not match current " 2230 "block settings (%d)- adjusting\n", softc->min_blk, 2231 softc->max_blk, softc->media_blksize); 2232 softc->max_blk = softc->min_blk = 2233 softc->media_blksize; 2234 } 2235 2236 /* 2237 * Now put ourselves into the right frame of mind based 2238 * upon quirks... 2239 */ 2240tryagain: 2241 /* 2242 * If we want to be in FIXED mode and our current blocksize 2243 * is not equal to our last blocksize (if nonzero), try and 2244 * set ourselves to this last blocksize (as the 'preferred' 2245 * block size). The initial quirkmatch at registry sets the 2246 * initial 'last' blocksize. If, for whatever reason, this 2247 * 'last' blocksize is zero, set the blocksize to 512, 2248 * or min_blk if that's larger. 2249 */ 2250 if ((softc->quirks & SA_QUIRK_FIXED) && 2251 (softc->quirks & SA_QUIRK_NO_MODESEL) == 0 && 2252 (softc->media_blksize != softc->last_media_blksize)) { 2253 softc->media_blksize = softc->last_media_blksize; 2254 if (softc->media_blksize == 0) { 2255 softc->media_blksize = 512; 2256 if (softc->media_blksize < softc->min_blk) { 2257 softc->media_blksize = softc->min_blk; 2258 } 2259 } 2260 error = sasetparams(periph, SA_PARAM_BLOCKSIZE, 2261 softc->media_blksize, 0, 0, SF_NO_PRINT); 2262 if (error) { 2263 xpt_print(periph->path, 2264 "unable to set fixed blocksize to %d\n", 2265 softc->media_blksize); 2266 goto exit; 2267 } 2268 } 2269 2270 if ((softc->quirks & SA_QUIRK_VARIABLE) && 2271 (softc->media_blksize != 0)) { 2272 softc->last_media_blksize = softc->media_blksize; 2273 softc->media_blksize = 0; 2274 error = sasetparams(periph, SA_PARAM_BLOCKSIZE, 2275 0, 0, 0, SF_NO_PRINT); 2276 if (error) { 2277 /* 2278 * If this fails and we were guessing, just 2279 * assume that we got it wrong and go try 2280 * fixed block mode. Don't even check against 2281 * density code at this point. 2282 */ 2283 if (guessing) { 2284 softc->quirks &= ~SA_QUIRK_VARIABLE; 2285 softc->quirks |= SA_QUIRK_FIXED; 2286 if (softc->last_media_blksize == 0) 2287 softc->last_media_blksize = 512; 2288 goto tryagain; 2289 } 2290 xpt_print(periph->path, 2291 "unable to set variable blocksize\n"); 2292 goto exit; 2293 } 2294 } 2295 2296 /* 2297 * Now that we have the current block size, 2298 * set up some parameters for sastart's usage. 2299 */ 2300 if (softc->media_blksize) { 2301 softc->flags |= SA_FLAG_FIXED; 2302 if (powerof2(softc->media_blksize)) { 2303 softc->blk_shift = 2304 ffs(softc->media_blksize) - 1; 2305 softc->blk_mask = softc->media_blksize - 1; 2306 } else { 2307 softc->blk_mask = ~0; 2308 softc->blk_shift = 0; 2309 } 2310 } else { 2311 /* 2312 * The SCSI-3 spec allows 0 to mean "unspecified". 2313 * The SCSI-1 spec allows 0 to mean 'infinite'. 2314 * 2315 * Either works here. 2316 */ 2317 if (softc->max_blk == 0) { 2318 softc->max_blk = ~0; 2319 } 2320 softc->blk_shift = 0; 2321 if (softc->blk_gran != 0) { 2322 softc->blk_mask = softc->blk_gran - 1; 2323 } else { 2324 softc->blk_mask = 0; 2325 } 2326 } 2327 2328 if (write_protect) 2329 softc->flags |= SA_FLAG_TAPE_WP; 2330 2331 if (comp_supported) { 2332 if (softc->saved_comp_algorithm == 0) 2333 softc->saved_comp_algorithm = 2334 softc->comp_algorithm; 2335 softc->flags |= SA_FLAG_COMP_SUPP; 2336 if (comp_enabled) 2337 softc->flags |= SA_FLAG_COMP_ENABLED; 2338 } else 2339 softc->flags |= SA_FLAG_COMP_UNSUPP; 2340 2341 if ((softc->buffer_mode == SMH_SA_BUF_MODE_NOBUF) && 2342 (softc->quirks & SA_QUIRK_NO_MODESEL) == 0) { 2343 error = sasetparams(periph, SA_PARAM_BUFF_MODE, 0, 2344 0, 0, SF_NO_PRINT); 2345 if (error == 0) { 2346 softc->buffer_mode = SMH_SA_BUF_MODE_SIBUF; 2347 } else { 2348 xpt_print(periph->path, 2349 "unable to set buffered mode\n"); 2350 } 2351 error = 0; /* not an error */ 2352 } 2353 2354 2355 if (error == 0) { 2356 softc->flags |= SA_FLAG_TAPE_MOUNTED; 2357 } 2358exit: 2359 if (rblim != NULL) 2360 free(rblim, M_SCSISA); 2361 2362 if (error != 0) { 2363 softc->dsreg = MTIO_DSREG_NIL; 2364 } else { 2365 softc->fileno = softc->blkno = 0; 2366 softc->dsreg = MTIO_DSREG_REST; 2367 } 2368#ifdef SA_1FM_AT_EOD 2369 if ((softc->quirks & SA_QUIRK_2FM) == 0) 2370 softc->quirks |= SA_QUIRK_1FM; 2371#else 2372 if ((softc->quirks & SA_QUIRK_1FM) == 0) 2373 softc->quirks |= SA_QUIRK_2FM; 2374#endif 2375 } else 2376 xpt_release_ccb(ccb); 2377 2378 /* 2379 * If we return an error, we're not mounted any more, 2380 * so release any device reservation. 2381 */ 2382 if (error != 0) { 2383 (void) sareservereleaseunit(periph, FALSE); 2384 } else { 2385 /* 2386 * Clear I/O residual. 2387 */ 2388 softc->last_io_resid = 0; 2389 softc->last_ctl_resid = 0; 2390 } 2391 return (error); 2392} 2393 2394/* 2395 * How many filemarks do we need to write if we were to terminate the 2396 * tape session right now? Note that this can be a negative number 2397 */ 2398 2399static int 2400samarkswanted(struct cam_periph *periph) 2401{ 2402 int markswanted; 2403 struct sa_softc *softc; 2404 2405 softc = (struct sa_softc *)periph->softc; 2406 markswanted = 0; 2407 if ((softc->flags & SA_FLAG_TAPE_WRITTEN) != 0) { 2408 markswanted++; 2409 if (softc->quirks & SA_QUIRK_2FM) 2410 markswanted++; 2411 } 2412 markswanted -= softc->filemarks; 2413 return (markswanted); 2414} 2415 2416static int 2417sacheckeod(struct cam_periph *periph) 2418{ 2419 int error; 2420 int markswanted; 2421 2422 markswanted = samarkswanted(periph); 2423 2424 if (markswanted > 0) { 2425 error = sawritefilemarks(periph, markswanted, FALSE); 2426 } else { 2427 error = 0; 2428 } 2429 return (error); 2430} 2431 2432static int 2433saerror(union ccb *ccb, u_int32_t cflgs, u_int32_t sflgs) 2434{ 2435 static const char *toobig = 2436 "%d-byte tape record bigger than supplied buffer\n"; 2437 struct cam_periph *periph; 2438 struct sa_softc *softc; 2439 struct ccb_scsiio *csio; 2440 struct scsi_sense_data *sense; 2441 uint64_t resid = 0; 2442 int64_t info = 0; 2443 cam_status status; 2444 int error_code, sense_key, asc, ascq, error, aqvalid, stream_valid; 2445 int sense_len; 2446 uint8_t stream_bits; 2447 2448 periph = xpt_path_periph(ccb->ccb_h.path); 2449 softc = (struct sa_softc *)periph->softc; 2450 csio = &ccb->csio; 2451 sense = &csio->sense_data; 2452 sense_len = csio->sense_len - csio->sense_resid; 2453 scsi_extract_sense_len(sense, sense_len, &error_code, &sense_key, 2454 &asc, &ascq, /*show_errors*/ 1); 2455 if (asc != -1 && ascq != -1) 2456 aqvalid = 1; 2457 else 2458 aqvalid = 0; 2459 if (scsi_get_stream_info(sense, sense_len, NULL, &stream_bits) == 0) 2460 stream_valid = 1; 2461 else 2462 stream_valid = 0; 2463 error = 0; 2464 2465 status = csio->ccb_h.status & CAM_STATUS_MASK; 2466 2467 /* 2468 * Calculate/latch up, any residuals... We do this in a funny 2-step 2469 * so we can print stuff here if we have CAM_DEBUG enabled for this 2470 * unit. 2471 */ 2472 if (status == CAM_SCSI_STATUS_ERROR) { 2473 if (scsi_get_sense_info(sense, sense_len, SSD_DESC_INFO, &resid, 2474 &info) == 0) { 2475 if ((softc->flags & SA_FLAG_FIXED) != 0) 2476 resid *= softc->media_blksize; 2477 } else { 2478 resid = csio->dxfer_len; 2479 info = resid; 2480 if ((softc->flags & SA_FLAG_FIXED) != 0) { 2481 if (softc->media_blksize) 2482 info /= softc->media_blksize; 2483 } 2484 } 2485 if (csio->cdb_io.cdb_bytes[0] == SA_READ || 2486 csio->cdb_io.cdb_bytes[0] == SA_WRITE) { 2487 bcopy((caddr_t) sense, (caddr_t) &softc->last_io_sense, 2488 sizeof (struct scsi_sense_data)); 2489 bcopy(csio->cdb_io.cdb_bytes, softc->last_io_cdb, 2490 (int) csio->cdb_len); 2491 softc->last_io_resid = resid; 2492 softc->last_resid_was_io = 1; 2493 } else { 2494 bcopy((caddr_t) sense, (caddr_t) &softc->last_ctl_sense, 2495 sizeof (struct scsi_sense_data)); 2496 bcopy(csio->cdb_io.cdb_bytes, softc->last_ctl_cdb, 2497 (int) csio->cdb_len); 2498 softc->last_ctl_resid = resid; 2499 softc->last_resid_was_io = 0; 2500 } 2501 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, ("CDB[0]=0x%x Key 0x%x " 2502 "ASC/ASCQ 0x%x/0x%x CAM STATUS 0x%x flags 0x%x resid %jd " 2503 "dxfer_len %d\n", csio->cdb_io.cdb_bytes[0] & 0xff, 2504 sense_key, asc, ascq, status, 2505 (stream_valid) ? stream_bits : 0, (intmax_t)resid, 2506 csio->dxfer_len)); 2507 } else { 2508 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 2509 ("Cam Status 0x%x\n", status)); 2510 } 2511 2512 switch (status) { 2513 case CAM_REQ_CMP: 2514 return (0); 2515 case CAM_SCSI_STATUS_ERROR: 2516 /* 2517 * If a read/write command, we handle it here. 2518 */ 2519 if (csio->cdb_io.cdb_bytes[0] == SA_READ || 2520 csio->cdb_io.cdb_bytes[0] == SA_WRITE) { 2521 break; 2522 } 2523 /* 2524 * If this was just EOM/EOP, Filemark, Setmark or ILI detected 2525 * on a non read/write command, we assume it's not an error 2526 * and propagate the residule and return. 2527 */ 2528 if ((aqvalid && asc == 0 && ascq > 0 && ascq <= 5) || 2529 (aqvalid == 0 && sense_key == SSD_KEY_NO_SENSE)) { 2530 csio->resid = resid; 2531 QFRLS(ccb); 2532 return (0); 2533 } 2534 /* 2535 * Otherwise, we let the common code handle this. 2536 */ 2537 return (cam_periph_error(ccb, cflgs, sflgs, &softc->saved_ccb)); 2538 2539 /* 2540 * XXX: To Be Fixed 2541 * We cannot depend upon CAM honoring retry counts for these. 2542 */ 2543 case CAM_SCSI_BUS_RESET: 2544 case CAM_BDR_SENT: 2545 if (ccb->ccb_h.retry_count <= 0) { 2546 return (EIO); 2547 } 2548 /* FALLTHROUGH */ 2549 default: 2550 return (cam_periph_error(ccb, cflgs, sflgs, &softc->saved_ccb)); 2551 } 2552 2553 /* 2554 * Handle filemark, end of tape, mismatched record sizes.... 2555 * From this point out, we're only handling read/write cases. 2556 * Handle writes && reads differently. 2557 */ 2558 2559 if (csio->cdb_io.cdb_bytes[0] == SA_WRITE) { 2560 if (sense_key == SSD_KEY_VOLUME_OVERFLOW) { 2561 csio->resid = resid; 2562 error = ENOSPC; 2563 } else if ((stream_valid != 0) && (stream_bits & SSD_EOM)) { 2564 softc->flags |= SA_FLAG_EOM_PENDING; 2565 /* 2566 * Grotesque as it seems, the few times 2567 * I've actually seen a non-zero resid, 2568 * the tape drive actually lied and had 2569 * written all the data!. 2570 */ 2571 csio->resid = 0; 2572 } 2573 } else { 2574 csio->resid = resid; 2575 if (sense_key == SSD_KEY_BLANK_CHECK) { 2576 if (softc->quirks & SA_QUIRK_1FM) { 2577 error = 0; 2578 softc->flags |= SA_FLAG_EOM_PENDING; 2579 } else { 2580 error = EIO; 2581 } 2582 } else if ((stream_valid != 0) && (stream_bits & SSD_FILEMARK)){ 2583 if (softc->flags & SA_FLAG_FIXED) { 2584 error = -1; 2585 softc->flags |= SA_FLAG_EOF_PENDING; 2586 } 2587 /* 2588 * Unconditionally, if we detected a filemark on a read, 2589 * mark that we've run moved a file ahead. 2590 */ 2591 if (softc->fileno != (daddr_t) -1) { 2592 softc->fileno++; 2593 softc->blkno = 0; 2594 csio->ccb_h.ccb_pflags |= SA_POSITION_UPDATED; 2595 } 2596 } 2597 } 2598 2599 /* 2600 * Incorrect Length usually applies to read, but can apply to writes. 2601 */ 2602 if (error == 0 && (stream_valid != 0) && (stream_bits & SSD_ILI)) { 2603 if (info < 0) { 2604 xpt_print(csio->ccb_h.path, toobig, 2605 csio->dxfer_len - info); 2606 csio->resid = csio->dxfer_len; 2607 error = EIO; 2608 } else { 2609 csio->resid = resid; 2610 if (softc->flags & SA_FLAG_FIXED) { 2611 softc->flags |= SA_FLAG_EIO_PENDING; 2612 } 2613 /* 2614 * Bump the block number if we hadn't seen a filemark. 2615 * Do this independent of errors (we've moved anyway). 2616 */ 2617 if ((stream_valid == 0) || 2618 (stream_bits & SSD_FILEMARK) == 0) { 2619 if (softc->blkno != (daddr_t) -1) { 2620 softc->blkno++; 2621 csio->ccb_h.ccb_pflags |= 2622 SA_POSITION_UPDATED; 2623 } 2624 } 2625 } 2626 } 2627 2628 if (error <= 0) { 2629 /* 2630 * Unfreeze the queue if frozen as we're not returning anything 2631 * to our waiters that would indicate an I/O error has occurred 2632 * (yet). 2633 */ 2634 QFRLS(ccb); 2635 error = 0; 2636 } 2637 return (error); 2638} 2639 2640static int 2641sagetparams(struct cam_periph *periph, sa_params params_to_get, 2642 u_int32_t *blocksize, u_int8_t *density, u_int32_t *numblocks, 2643 int *buff_mode, u_int8_t *write_protect, u_int8_t *speed, 2644 int *comp_supported, int *comp_enabled, u_int32_t *comp_algorithm, 2645 sa_comp_t *tcs) 2646{ 2647 union ccb *ccb; 2648 void *mode_buffer; 2649 struct scsi_mode_header_6 *mode_hdr; 2650 struct scsi_mode_blk_desc *mode_blk; 2651 int mode_buffer_len; 2652 struct sa_softc *softc; 2653 u_int8_t cpage; 2654 int error; 2655 cam_status status; 2656 2657 softc = (struct sa_softc *)periph->softc; 2658 ccb = cam_periph_getccb(periph, 1); 2659 if (softc->quirks & SA_QUIRK_NO_CPAGE) 2660 cpage = SA_DEVICE_CONFIGURATION_PAGE; 2661 else 2662 cpage = SA_DATA_COMPRESSION_PAGE; 2663 2664retry: 2665 mode_buffer_len = sizeof(*mode_hdr) + sizeof(*mode_blk); 2666 2667 if (params_to_get & SA_PARAM_COMPRESSION) { 2668 if (softc->quirks & SA_QUIRK_NOCOMP) { 2669 *comp_supported = FALSE; 2670 params_to_get &= ~SA_PARAM_COMPRESSION; 2671 } else 2672 mode_buffer_len += sizeof (sa_comp_t); 2673 } 2674 2675 /* XXX Fix M_NOWAIT */ 2676 mode_buffer = malloc(mode_buffer_len, M_SCSISA, M_NOWAIT | M_ZERO); 2677 if (mode_buffer == NULL) { 2678 xpt_release_ccb(ccb); 2679 return (ENOMEM); 2680 } 2681 mode_hdr = (struct scsi_mode_header_6 *)mode_buffer; 2682 mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1]; 2683 2684 /* it is safe to retry this */ 2685 scsi_mode_sense(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, FALSE, 2686 SMS_PAGE_CTRL_CURRENT, (params_to_get & SA_PARAM_COMPRESSION) ? 2687 cpage : SMS_VENDOR_SPECIFIC_PAGE, mode_buffer, mode_buffer_len, 2688 SSD_FULL_SIZE, SCSIOP_TIMEOUT); 2689 2690 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT, 2691 softc->device_stats); 2692 2693 status = ccb->ccb_h.status & CAM_STATUS_MASK; 2694 2695 if (error == EINVAL && (params_to_get & SA_PARAM_COMPRESSION) != 0) { 2696 /* 2697 * Hmm. Let's see if we can try another page... 2698 * If we've already done that, give up on compression 2699 * for this device and remember this for the future 2700 * and attempt the request without asking for compression 2701 * info. 2702 */ 2703 if (cpage == SA_DATA_COMPRESSION_PAGE) { 2704 cpage = SA_DEVICE_CONFIGURATION_PAGE; 2705 goto retry; 2706 } 2707 softc->quirks |= SA_QUIRK_NOCOMP; 2708 free(mode_buffer, M_SCSISA); 2709 goto retry; 2710 } else if (status == CAM_SCSI_STATUS_ERROR) { 2711 /* Tell the user about the fatal error. */ 2712 scsi_sense_print(&ccb->csio); 2713 goto sagetparamsexit; 2714 } 2715 2716 /* 2717 * If the user only wants the compression information, and 2718 * the device doesn't send back the block descriptor, it's 2719 * no big deal. If the user wants more than just 2720 * compression, though, and the device doesn't pass back the 2721 * block descriptor, we need to send another mode sense to 2722 * get the block descriptor. 2723 */ 2724 if ((mode_hdr->blk_desc_len == 0) && 2725 (params_to_get & SA_PARAM_COMPRESSION) && 2726 (params_to_get & ~(SA_PARAM_COMPRESSION))) { 2727 2728 /* 2729 * Decrease the mode buffer length by the size of 2730 * the compression page, to make sure the data 2731 * there doesn't get overwritten. 2732 */ 2733 mode_buffer_len -= sizeof (sa_comp_t); 2734 2735 /* 2736 * Now move the compression page that we presumably 2737 * got back down the memory chunk a little bit so 2738 * it doesn't get spammed. 2739 */ 2740 bcopy(&mode_hdr[0], &mode_hdr[1], sizeof (sa_comp_t)); 2741 bzero(&mode_hdr[0], sizeof (mode_hdr[0])); 2742 2743 /* 2744 * Now, we issue another mode sense and just ask 2745 * for the block descriptor, etc. 2746 */ 2747 2748 scsi_mode_sense(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, FALSE, 2749 SMS_PAGE_CTRL_CURRENT, SMS_VENDOR_SPECIFIC_PAGE, 2750 mode_buffer, mode_buffer_len, SSD_FULL_SIZE, 2751 SCSIOP_TIMEOUT); 2752 2753 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT, 2754 softc->device_stats); 2755 2756 if (error != 0) 2757 goto sagetparamsexit; 2758 } 2759 2760 if (params_to_get & SA_PARAM_BLOCKSIZE) 2761 *blocksize = scsi_3btoul(mode_blk->blklen); 2762 2763 if (params_to_get & SA_PARAM_NUMBLOCKS) 2764 *numblocks = scsi_3btoul(mode_blk->nblocks); 2765 2766 if (params_to_get & SA_PARAM_BUFF_MODE) 2767 *buff_mode = mode_hdr->dev_spec & SMH_SA_BUF_MODE_MASK; 2768 2769 if (params_to_get & SA_PARAM_DENSITY) 2770 *density = mode_blk->density; 2771 2772 if (params_to_get & SA_PARAM_WP) 2773 *write_protect = (mode_hdr->dev_spec & SMH_SA_WP)? TRUE : FALSE; 2774 2775 if (params_to_get & SA_PARAM_SPEED) 2776 *speed = mode_hdr->dev_spec & SMH_SA_SPEED_MASK; 2777 2778 if (params_to_get & SA_PARAM_COMPRESSION) { 2779 sa_comp_t *ntcs = (sa_comp_t *) &mode_blk[1]; 2780 if (cpage == SA_DATA_COMPRESSION_PAGE) { 2781 struct scsi_data_compression_page *cp = &ntcs->dcomp; 2782 *comp_supported = 2783 (cp->dce_and_dcc & SA_DCP_DCC)? TRUE : FALSE; 2784 *comp_enabled = 2785 (cp->dce_and_dcc & SA_DCP_DCE)? TRUE : FALSE; 2786 *comp_algorithm = scsi_4btoul(cp->comp_algorithm); 2787 } else { 2788 struct scsi_dev_conf_page *cp = &ntcs->dconf; 2789 /* 2790 * We don't really know whether this device supports 2791 * Data Compression if the algorithm field is 2792 * zero. Just say we do. 2793 */ 2794 *comp_supported = TRUE; 2795 *comp_enabled = 2796 (cp->sel_comp_alg != SA_COMP_NONE)? TRUE : FALSE; 2797 *comp_algorithm = cp->sel_comp_alg; 2798 } 2799 if (tcs != NULL) 2800 bcopy(ntcs, tcs, sizeof (sa_comp_t)); 2801 } 2802 2803 if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) { 2804 int idx; 2805 char *xyz = mode_buffer; 2806 xpt_print_path(periph->path); 2807 printf("Mode Sense Data="); 2808 for (idx = 0; idx < mode_buffer_len; idx++) 2809 printf(" 0x%02x", xyz[idx] & 0xff); 2810 printf("\n"); 2811 } 2812 2813sagetparamsexit: 2814 2815 xpt_release_ccb(ccb); 2816 free(mode_buffer, M_SCSISA); 2817 return (error); 2818} 2819 2820/* 2821 * The purpose of this function is to set one of four different parameters 2822 * for a tape drive: 2823 * - blocksize 2824 * - density 2825 * - compression / compression algorithm 2826 * - buffering mode 2827 * 2828 * The assumption is that this will be called from saioctl(), and therefore 2829 * from a process context. Thus the waiting malloc calls below. If that 2830 * assumption ever changes, the malloc calls should be changed to be 2831 * NOWAIT mallocs. 2832 * 2833 * Any or all of the four parameters may be set when this function is 2834 * called. It should handle setting more than one parameter at once. 2835 */ 2836static int 2837sasetparams(struct cam_periph *periph, sa_params params_to_set, 2838 u_int32_t blocksize, u_int8_t density, u_int32_t calg, 2839 u_int32_t sense_flags) 2840{ 2841 struct sa_softc *softc; 2842 u_int32_t current_blocksize; 2843 u_int32_t current_calg; 2844 u_int8_t current_density; 2845 u_int8_t current_speed; 2846 int comp_enabled, comp_supported; 2847 void *mode_buffer; 2848 int mode_buffer_len; 2849 struct scsi_mode_header_6 *mode_hdr; 2850 struct scsi_mode_blk_desc *mode_blk; 2851 sa_comp_t *ccomp, *cpage; 2852 int buff_mode; 2853 union ccb *ccb = NULL; 2854 int error; 2855 2856 softc = (struct sa_softc *)periph->softc; 2857 2858 ccomp = malloc(sizeof (sa_comp_t), M_SCSISA, M_NOWAIT); 2859 if (ccomp == NULL) 2860 return (ENOMEM); 2861 2862 /* 2863 * Since it doesn't make sense to set the number of blocks, or 2864 * write protection, we won't try to get the current value. We 2865 * always want to get the blocksize, so we can set it back to the 2866 * proper value. 2867 */ 2868 error = sagetparams(periph, 2869 params_to_set | SA_PARAM_BLOCKSIZE | SA_PARAM_SPEED, 2870 ¤t_blocksize, ¤t_density, NULL, &buff_mode, NULL, 2871 ¤t_speed, &comp_supported, &comp_enabled, 2872 ¤t_calg, ccomp); 2873 2874 if (error != 0) { 2875 free(ccomp, M_SCSISA); 2876 return (error); 2877 } 2878 2879 mode_buffer_len = sizeof(*mode_hdr) + sizeof(*mode_blk); 2880 if (params_to_set & SA_PARAM_COMPRESSION) 2881 mode_buffer_len += sizeof (sa_comp_t); 2882 2883 mode_buffer = malloc(mode_buffer_len, M_SCSISA, M_NOWAIT | M_ZERO); 2884 if (mode_buffer == NULL) { 2885 free(ccomp, M_SCSISA); 2886 return (ENOMEM); 2887 } 2888 2889 mode_hdr = (struct scsi_mode_header_6 *)mode_buffer; 2890 mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1]; 2891 2892 ccb = cam_periph_getccb(periph, 1); 2893 2894retry: 2895 2896 if (params_to_set & SA_PARAM_COMPRESSION) { 2897 if (mode_blk) { 2898 cpage = (sa_comp_t *)&mode_blk[1]; 2899 } else { 2900 cpage = (sa_comp_t *)&mode_hdr[1]; 2901 } 2902 bcopy(ccomp, cpage, sizeof (sa_comp_t)); 2903 cpage->hdr.pagecode &= ~0x80; 2904 } else 2905 cpage = NULL; 2906 2907 /* 2908 * If the caller wants us to set the blocksize, use the one they 2909 * pass in. Otherwise, use the blocksize we got back from the 2910 * mode select above. 2911 */ 2912 if (mode_blk) { 2913 if (params_to_set & SA_PARAM_BLOCKSIZE) 2914 scsi_ulto3b(blocksize, mode_blk->blklen); 2915 else 2916 scsi_ulto3b(current_blocksize, mode_blk->blklen); 2917 2918 /* 2919 * Set density if requested, else preserve old density. 2920 * SCSI_SAME_DENSITY only applies to SCSI-2 or better 2921 * devices, else density we've latched up in our softc. 2922 */ 2923 if (params_to_set & SA_PARAM_DENSITY) { 2924 mode_blk->density = density; 2925 } else if (softc->scsi_rev > SCSI_REV_CCS) { 2926 mode_blk->density = SCSI_SAME_DENSITY; 2927 } else { 2928 mode_blk->density = softc->media_density; 2929 } 2930 } 2931 2932 /* 2933 * For mode selects, these two fields must be zero. 2934 */ 2935 mode_hdr->data_length = 0; 2936 mode_hdr->medium_type = 0; 2937 2938 /* set the speed to the current value */ 2939 mode_hdr->dev_spec = current_speed; 2940 2941 /* if set, set single-initiator buffering mode */ 2942 if (softc->buffer_mode == SMH_SA_BUF_MODE_SIBUF) { 2943 mode_hdr->dev_spec |= SMH_SA_BUF_MODE_SIBUF; 2944 } 2945 2946 if (mode_blk) 2947 mode_hdr->blk_desc_len = sizeof(struct scsi_mode_blk_desc); 2948 else 2949 mode_hdr->blk_desc_len = 0; 2950 2951 /* 2952 * First, if the user wants us to set the compression algorithm or 2953 * just turn compression on, check to make sure that this drive 2954 * supports compression. 2955 */ 2956 if (params_to_set & SA_PARAM_COMPRESSION) { 2957 /* 2958 * If the compression algorithm is 0, disable compression. 2959 * If the compression algorithm is non-zero, enable 2960 * compression and set the compression type to the 2961 * specified compression algorithm, unless the algorithm is 2962 * MT_COMP_ENABLE. In that case, we look at the 2963 * compression algorithm that is currently set and if it is 2964 * non-zero, we leave it as-is. If it is zero, and we have 2965 * saved a compression algorithm from a time when 2966 * compression was enabled before, set the compression to 2967 * the saved value. 2968 */ 2969 switch (ccomp->hdr.pagecode & ~0x80) { 2970 case SA_DEVICE_CONFIGURATION_PAGE: 2971 { 2972 struct scsi_dev_conf_page *dcp = &cpage->dconf; 2973 if (calg == 0) { 2974 dcp->sel_comp_alg = SA_COMP_NONE; 2975 break; 2976 } 2977 if (calg != MT_COMP_ENABLE) { 2978 dcp->sel_comp_alg = calg; 2979 } else if (dcp->sel_comp_alg == SA_COMP_NONE && 2980 softc->saved_comp_algorithm != 0) { 2981 dcp->sel_comp_alg = softc->saved_comp_algorithm; 2982 } 2983 break; 2984 } 2985 case SA_DATA_COMPRESSION_PAGE: 2986 if (ccomp->dcomp.dce_and_dcc & SA_DCP_DCC) { 2987 struct scsi_data_compression_page *dcp = &cpage->dcomp; 2988 if (calg == 0) { 2989 /* 2990 * Disable compression, but leave the 2991 * decompression and the capability bit 2992 * alone. 2993 */ 2994 dcp->dce_and_dcc = SA_DCP_DCC; 2995 dcp->dde_and_red |= SA_DCP_DDE; 2996 break; 2997 } 2998 /* enable compression && decompression */ 2999 dcp->dce_and_dcc = SA_DCP_DCE | SA_DCP_DCC; 3000 dcp->dde_and_red |= SA_DCP_DDE; 3001 /* 3002 * If there, use compression algorithm from caller. 3003 * Otherwise, if there's a saved compression algorithm 3004 * and there is no current algorithm, use the saved 3005 * algorithm. Else parrot back what we got and hope 3006 * for the best. 3007 */ 3008 if (calg != MT_COMP_ENABLE) { 3009 scsi_ulto4b(calg, dcp->comp_algorithm); 3010 scsi_ulto4b(calg, dcp->decomp_algorithm); 3011 } else if (scsi_4btoul(dcp->comp_algorithm) == 0 && 3012 softc->saved_comp_algorithm != 0) { 3013 scsi_ulto4b(softc->saved_comp_algorithm, 3014 dcp->comp_algorithm); 3015 scsi_ulto4b(softc->saved_comp_algorithm, 3016 dcp->decomp_algorithm); 3017 } 3018 break; 3019 } 3020 /* 3021 * Compression does not appear to be supported- 3022 * at least via the DATA COMPRESSION page. It 3023 * would be too much to ask us to believe that 3024 * the page itself is supported, but incorrectly 3025 * reports an ability to manipulate data compression, 3026 * so we'll assume that this device doesn't support 3027 * compression. We can just fall through for that. 3028 */ 3029 /* FALLTHROUGH */ 3030 default: 3031 /* 3032 * The drive doesn't seem to support compression, 3033 * so turn off the set compression bit. 3034 */ 3035 params_to_set &= ~SA_PARAM_COMPRESSION; 3036 xpt_print(periph->path, 3037 "device does not seem to support compression\n"); 3038 3039 /* 3040 * If that was the only thing the user wanted us to set, 3041 * clean up allocated resources and return with 3042 * 'operation not supported'. 3043 */ 3044 if (params_to_set == SA_PARAM_NONE) { 3045 free(mode_buffer, M_SCSISA); 3046 xpt_release_ccb(ccb); 3047 return (ENODEV); 3048 } 3049 3050 /* 3051 * That wasn't the only thing the user wanted us to set. 3052 * So, decrease the stated mode buffer length by the 3053 * size of the compression mode page. 3054 */ 3055 mode_buffer_len -= sizeof(sa_comp_t); 3056 } 3057 } 3058 3059 /* It is safe to retry this operation */ 3060 scsi_mode_select(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, 3061 (params_to_set & SA_PARAM_COMPRESSION)? TRUE : FALSE, 3062 FALSE, mode_buffer, mode_buffer_len, SSD_FULL_SIZE, SCSIOP_TIMEOUT); 3063 3064 error = cam_periph_runccb(ccb, saerror, 0, 3065 sense_flags, softc->device_stats); 3066 3067 if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) { 3068 int idx; 3069 char *xyz = mode_buffer; 3070 xpt_print_path(periph->path); 3071 printf("Err%d, Mode Select Data=", error); 3072 for (idx = 0; idx < mode_buffer_len; idx++) 3073 printf(" 0x%02x", xyz[idx] & 0xff); 3074 printf("\n"); 3075 } 3076 3077 3078 if (error) { 3079 /* 3080 * If we can, try without setting density/blocksize. 3081 */ 3082 if (mode_blk) { 3083 if ((params_to_set & 3084 (SA_PARAM_DENSITY|SA_PARAM_BLOCKSIZE)) == 0) { 3085 mode_blk = NULL; 3086 goto retry; 3087 } 3088 } else { 3089 mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1]; 3090 cpage = (sa_comp_t *)&mode_blk[1]; 3091 } 3092 3093 /* 3094 * If we were setting the blocksize, and that failed, we 3095 * want to set it to its original value. If we weren't 3096 * setting the blocksize, we don't want to change it. 3097 */ 3098 scsi_ulto3b(current_blocksize, mode_blk->blklen); 3099 3100 /* 3101 * Set density if requested, else preserve old density. 3102 * SCSI_SAME_DENSITY only applies to SCSI-2 or better 3103 * devices, else density we've latched up in our softc. 3104 */ 3105 if (params_to_set & SA_PARAM_DENSITY) { 3106 mode_blk->density = current_density; 3107 } else if (softc->scsi_rev > SCSI_REV_CCS) { 3108 mode_blk->density = SCSI_SAME_DENSITY; 3109 } else { 3110 mode_blk->density = softc->media_density; 3111 } 3112 3113 if (params_to_set & SA_PARAM_COMPRESSION) 3114 bcopy(ccomp, cpage, sizeof (sa_comp_t)); 3115 3116 /* 3117 * The retry count is the only CCB field that might have been 3118 * changed that we care about, so reset it back to 1. 3119 */ 3120 ccb->ccb_h.retry_count = 1; 3121 cam_periph_runccb(ccb, saerror, 0, sense_flags, 3122 softc->device_stats); 3123 } 3124 3125 xpt_release_ccb(ccb); 3126 3127 if (ccomp != NULL) 3128 free(ccomp, M_SCSISA); 3129 3130 if (params_to_set & SA_PARAM_COMPRESSION) { 3131 if (error) { 3132 softc->flags &= ~SA_FLAG_COMP_ENABLED; 3133 /* 3134 * Even if we get an error setting compression, 3135 * do not say that we don't support it. We could 3136 * have been wrong, or it may be media specific. 3137 * softc->flags &= ~SA_FLAG_COMP_SUPP; 3138 */ 3139 softc->saved_comp_algorithm = softc->comp_algorithm; 3140 softc->comp_algorithm = 0; 3141 } else { 3142 softc->flags |= SA_FLAG_COMP_ENABLED; 3143 softc->comp_algorithm = calg; 3144 } 3145 } 3146 3147 free(mode_buffer, M_SCSISA); 3148 return (error); 3149} 3150 3151static void 3152saprevent(struct cam_periph *periph, int action) 3153{ 3154 struct sa_softc *softc; 3155 union ccb *ccb; 3156 int error, sf; 3157 3158 softc = (struct sa_softc *)periph->softc; 3159 3160 if ((action == PR_ALLOW) && (softc->flags & SA_FLAG_TAPE_LOCKED) == 0) 3161 return; 3162 if ((action == PR_PREVENT) && (softc->flags & SA_FLAG_TAPE_LOCKED) != 0) 3163 return; 3164 3165 /* 3166 * We can be quiet about illegal requests. 3167 */ 3168 if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) { 3169 sf = 0; 3170 } else 3171 sf = SF_QUIET_IR; 3172 3173 ccb = cam_periph_getccb(periph, 1); 3174 3175 /* It is safe to retry this operation */ 3176 scsi_prevent(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, action, 3177 SSD_FULL_SIZE, SCSIOP_TIMEOUT); 3178 3179 error = cam_periph_runccb(ccb, saerror, 0, sf, softc->device_stats); 3180 if (error == 0) { 3181 if (action == PR_ALLOW) 3182 softc->flags &= ~SA_FLAG_TAPE_LOCKED; 3183 else 3184 softc->flags |= SA_FLAG_TAPE_LOCKED; 3185 } 3186 3187 xpt_release_ccb(ccb); 3188} 3189 3190static int 3191sarewind(struct cam_periph *periph) 3192{ 3193 union ccb *ccb; 3194 struct sa_softc *softc; 3195 int error; 3196 3197 softc = (struct sa_softc *)periph->softc; 3198 3199 ccb = cam_periph_getccb(periph, 1); 3200 3201 /* It is safe to retry this operation */ 3202 scsi_rewind(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, FALSE, 3203 SSD_FULL_SIZE, REWIND_TIMEOUT); 3204 3205 softc->dsreg = MTIO_DSREG_REW; 3206 error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats); 3207 softc->dsreg = MTIO_DSREG_REST; 3208 3209 xpt_release_ccb(ccb); 3210 if (error == 0) 3211 softc->fileno = softc->blkno = (daddr_t) 0; 3212 else 3213 softc->fileno = softc->blkno = (daddr_t) -1; 3214 return (error); 3215} 3216 3217static int 3218saspace(struct cam_periph *periph, int count, scsi_space_code code) 3219{ 3220 union ccb *ccb; 3221 struct sa_softc *softc; 3222 int error; 3223 3224 softc = (struct sa_softc *)periph->softc; 3225 3226 ccb = cam_periph_getccb(periph, 1); 3227 3228 /* This cannot be retried */ 3229 3230 scsi_space(&ccb->csio, 0, sadone, MSG_SIMPLE_Q_TAG, code, count, 3231 SSD_FULL_SIZE, SPACE_TIMEOUT); 3232 3233 /* 3234 * Clear residual because we will be using it. 3235 */ 3236 softc->last_ctl_resid = 0; 3237 3238 softc->dsreg = (count < 0)? MTIO_DSREG_REV : MTIO_DSREG_FWD; 3239 error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats); 3240 softc->dsreg = MTIO_DSREG_REST; 3241 3242 xpt_release_ccb(ccb); 3243 3244 /* 3245 * If a spacing operation has failed, we need to invalidate 3246 * this mount. 3247 * 3248 * If the spacing operation was setmarks or to end of recorded data, 3249 * we no longer know our relative position. 3250 * 3251 * If the spacing operations was spacing files in reverse, we 3252 * take account of the residual, but still check against less 3253 * than zero- if we've gone negative, we must have hit BOT. 3254 * 3255 * If the spacing operations was spacing records in reverse and 3256 * we have a residual, we've either hit BOT or hit a filemark. 3257 * In the former case, we know our new record number (0). In 3258 * the latter case, we have absolutely no idea what the real 3259 * record number is- we've stopped between the end of the last 3260 * record in the previous file and the filemark that stopped 3261 * our spacing backwards. 3262 */ 3263 if (error) { 3264 softc->fileno = softc->blkno = (daddr_t) -1; 3265 } else if (code == SS_SETMARKS || code == SS_EOD) { 3266 softc->fileno = softc->blkno = (daddr_t) -1; 3267 } else if (code == SS_FILEMARKS && softc->fileno != (daddr_t) -1) { 3268 softc->fileno += (count - softc->last_ctl_resid); 3269 if (softc->fileno < 0) /* we must of hit BOT */ 3270 softc->fileno = 0; 3271 softc->blkno = 0; 3272 } else if (code == SS_BLOCKS && softc->blkno != (daddr_t) -1) { 3273 softc->blkno += (count - softc->last_ctl_resid); 3274 if (count < 0) { 3275 if (softc->last_ctl_resid || softc->blkno < 0) { 3276 if (softc->fileno == 0) { 3277 softc->blkno = 0; 3278 } else { 3279 softc->blkno = (daddr_t) -1; 3280 } 3281 } 3282 } 3283 } 3284 return (error); 3285} 3286 3287static int 3288sawritefilemarks(struct cam_periph *periph, int nmarks, int setmarks) 3289{ 3290 union ccb *ccb; 3291 struct sa_softc *softc; 3292 int error, nwm = 0; 3293 3294 softc = (struct sa_softc *)periph->softc; 3295 if (softc->open_rdonly) 3296 return (EBADF); 3297 3298 ccb = cam_periph_getccb(periph, 1); 3299 /* 3300 * Clear residual because we will be using it. 3301 */ 3302 softc->last_ctl_resid = 0; 3303 3304 softc->dsreg = MTIO_DSREG_FMK; 3305 /* this *must* not be retried */ 3306 scsi_write_filemarks(&ccb->csio, 0, sadone, MSG_SIMPLE_Q_TAG, 3307 FALSE, setmarks, nmarks, SSD_FULL_SIZE, IO_TIMEOUT); 3308 softc->dsreg = MTIO_DSREG_REST; 3309 3310 3311 error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats); 3312 3313 if (error == 0 && nmarks) { 3314 struct sa_softc *softc = (struct sa_softc *)periph->softc; 3315 nwm = nmarks - softc->last_ctl_resid; 3316 softc->filemarks += nwm; 3317 } 3318 3319 xpt_release_ccb(ccb); 3320 3321 /* 3322 * Update relative positions (if we're doing that). 3323 */ 3324 if (error) { 3325 softc->fileno = softc->blkno = (daddr_t) -1; 3326 } else if (softc->fileno != (daddr_t) -1) { 3327 softc->fileno += nwm; 3328 softc->blkno = 0; 3329 } 3330 return (error); 3331} 3332 3333static int 3334sardpos(struct cam_periph *periph, int hard, u_int32_t *blkptr) 3335{ 3336 struct scsi_tape_position_data loc; 3337 union ccb *ccb; 3338 struct sa_softc *softc = (struct sa_softc *)periph->softc; 3339 int error; 3340 3341 /* 3342 * We try and flush any buffered writes here if we were writing 3343 * and we're trying to get hardware block position. It eats 3344 * up performance substantially, but I'm wary of drive firmware. 3345 * 3346 * I think that *logical* block position is probably okay- 3347 * but hardware block position might have to wait for data 3348 * to hit media to be valid. Caveat Emptor. 3349 */ 3350 3351 if (hard && (softc->flags & SA_FLAG_TAPE_WRITTEN)) { 3352 error = sawritefilemarks(periph, 0, 0); 3353 if (error && error != EACCES) 3354 return (error); 3355 } 3356 3357 ccb = cam_periph_getccb(periph, 1); 3358 scsi_read_position(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG, 3359 hard, &loc, SSD_FULL_SIZE, SCSIOP_TIMEOUT); 3360 softc->dsreg = MTIO_DSREG_RBSY; 3361 error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats); 3362 softc->dsreg = MTIO_DSREG_REST; 3363 3364 if (error == 0) { 3365 if (loc.flags & SA_RPOS_UNCERTAIN) { 3366 error = EINVAL; /* nothing is certain */ 3367 } else { 3368 *blkptr = scsi_4btoul(loc.firstblk); 3369 } 3370 } 3371 3372 xpt_release_ccb(ccb); 3373 return (error); 3374} 3375 3376static int 3377sasetpos(struct cam_periph *periph, int hard, u_int32_t *blkptr) 3378{ 3379 union ccb *ccb; 3380 struct sa_softc *softc; 3381 int error; 3382 3383 /* 3384 * We used to try and flush any buffered writes here. 3385 * Now we push this onto user applications to either 3386 * flush the pending writes themselves (via a zero count 3387 * WRITE FILEMARKS command) or they can trust their tape 3388 * drive to do this correctly for them. 3389 */ 3390 3391 softc = (struct sa_softc *)periph->softc; 3392 ccb = cam_periph_getccb(periph, 1); 3393 3394 3395 scsi_set_position(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG, 3396 hard, *blkptr, SSD_FULL_SIZE, SPACE_TIMEOUT); 3397 3398 3399 softc->dsreg = MTIO_DSREG_POS; 3400 error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats); 3401 softc->dsreg = MTIO_DSREG_REST; 3402 xpt_release_ccb(ccb); 3403 /* 3404 * Note relative file && block number position as now unknown. 3405 */ 3406 softc->fileno = softc->blkno = (daddr_t) -1; 3407 return (error); 3408} 3409 3410static int 3411saretension(struct cam_periph *periph) 3412{ 3413 union ccb *ccb; 3414 struct sa_softc *softc; 3415 int error; 3416 3417 softc = (struct sa_softc *)periph->softc; 3418 3419 ccb = cam_periph_getccb(periph, 1); 3420 3421 /* It is safe to retry this operation */ 3422 scsi_load_unload(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, FALSE, 3423 FALSE, TRUE, TRUE, SSD_FULL_SIZE, ERASE_TIMEOUT); 3424 3425 softc->dsreg = MTIO_DSREG_TEN; 3426 error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats); 3427 softc->dsreg = MTIO_DSREG_REST; 3428 3429 xpt_release_ccb(ccb); 3430 if (error == 0) 3431 softc->fileno = softc->blkno = (daddr_t) 0; 3432 else 3433 softc->fileno = softc->blkno = (daddr_t) -1; 3434 return (error); 3435} 3436 3437static int 3438sareservereleaseunit(struct cam_periph *periph, int reserve) 3439{ 3440 union ccb *ccb; 3441 struct sa_softc *softc; 3442 int error; 3443 3444 softc = (struct sa_softc *)periph->softc; 3445 ccb = cam_periph_getccb(periph, 1); 3446 3447 /* It is safe to retry this operation */ 3448 scsi_reserve_release_unit(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, 3449 FALSE, 0, SSD_FULL_SIZE, SCSIOP_TIMEOUT, reserve); 3450 softc->dsreg = MTIO_DSREG_RBSY; 3451 error = cam_periph_runccb(ccb, saerror, 0, 3452 SF_RETRY_UA | SF_NO_PRINT, softc->device_stats); 3453 softc->dsreg = MTIO_DSREG_REST; 3454 xpt_release_ccb(ccb); 3455 3456 /* 3457 * If the error was Illegal Request, then the device doesn't support 3458 * RESERVE/RELEASE. This is not an error. 3459 */ 3460 if (error == EINVAL) { 3461 error = 0; 3462 } 3463 3464 return (error); 3465} 3466 3467static int 3468saloadunload(struct cam_periph *periph, int load) 3469{ 3470 union ccb *ccb; 3471 struct sa_softc *softc; 3472 int error; 3473 3474 softc = (struct sa_softc *)periph->softc; 3475 3476 ccb = cam_periph_getccb(periph, 1); 3477 3478 /* It is safe to retry this operation */ 3479 scsi_load_unload(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, FALSE, 3480 FALSE, FALSE, load, SSD_FULL_SIZE, REWIND_TIMEOUT); 3481 3482 softc->dsreg = (load)? MTIO_DSREG_LD : MTIO_DSREG_UNL; 3483 error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats); 3484 softc->dsreg = MTIO_DSREG_REST; 3485 xpt_release_ccb(ccb); 3486 3487 if (error || load == 0) 3488 softc->fileno = softc->blkno = (daddr_t) -1; 3489 else if (error == 0) 3490 softc->fileno = softc->blkno = (daddr_t) 0; 3491 return (error); 3492} 3493 3494static int 3495saerase(struct cam_periph *periph, int longerase) 3496{ 3497 3498 union ccb *ccb; 3499 struct sa_softc *softc; 3500 int error; 3501 3502 softc = (struct sa_softc *)periph->softc; 3503 if (softc->open_rdonly) 3504 return (EBADF); 3505 3506 ccb = cam_periph_getccb(periph, 1); 3507 3508 scsi_erase(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG, FALSE, longerase, 3509 SSD_FULL_SIZE, ERASE_TIMEOUT); 3510 3511 softc->dsreg = MTIO_DSREG_ZER; 3512 error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats); 3513 softc->dsreg = MTIO_DSREG_REST; 3514 3515 xpt_release_ccb(ccb); 3516 return (error); 3517} 3518 3519#endif /* _KERNEL */ 3520 3521/* 3522 * Read tape block limits command. 3523 */ 3524void 3525scsi_read_block_limits(struct ccb_scsiio *csio, u_int32_t retries, 3526 void (*cbfcnp)(struct cam_periph *, union ccb *), 3527 u_int8_t tag_action, 3528 struct scsi_read_block_limits_data *rlimit_buf, 3529 u_int8_t sense_len, u_int32_t timeout) 3530{ 3531 struct scsi_read_block_limits *scsi_cmd; 3532 3533 cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_IN, tag_action, 3534 (u_int8_t *)rlimit_buf, sizeof(*rlimit_buf), sense_len, 3535 sizeof(*scsi_cmd), timeout); 3536 3537 scsi_cmd = (struct scsi_read_block_limits *)&csio->cdb_io.cdb_bytes; 3538 bzero(scsi_cmd, sizeof(*scsi_cmd)); 3539 scsi_cmd->opcode = READ_BLOCK_LIMITS; 3540} 3541 3542void 3543scsi_sa_read_write(struct ccb_scsiio *csio, u_int32_t retries, 3544 void (*cbfcnp)(struct cam_periph *, union ccb *), 3545 u_int8_t tag_action, int readop, int sli, 3546 int fixed, u_int32_t length, u_int8_t *data_ptr, 3547 u_int32_t dxfer_len, u_int8_t sense_len, u_int32_t timeout) 3548{ 3549 struct scsi_sa_rw *scsi_cmd; 3550 int read; 3551 3552 read = (readop & SCSI_RW_DIRMASK) == SCSI_RW_READ; 3553 3554 scsi_cmd = (struct scsi_sa_rw *)&csio->cdb_io.cdb_bytes; 3555 scsi_cmd->opcode = read ? SA_READ : SA_WRITE; 3556 scsi_cmd->sli_fixed = 0; 3557 if (sli && read) 3558 scsi_cmd->sli_fixed |= SAR_SLI; 3559 if (fixed) 3560 scsi_cmd->sli_fixed |= SARW_FIXED; 3561 scsi_ulto3b(length, scsi_cmd->length); 3562 scsi_cmd->control = 0; 3563 3564 cam_fill_csio(csio, retries, cbfcnp, (read ? CAM_DIR_IN : CAM_DIR_OUT) | 3565 ((readop & SCSI_RW_BIO) != 0 ? CAM_DATA_BIO : 0), 3566 tag_action, data_ptr, dxfer_len, sense_len, 3567 sizeof(*scsi_cmd), timeout); 3568} 3569 3570void 3571scsi_load_unload(struct ccb_scsiio *csio, u_int32_t retries, 3572 void (*cbfcnp)(struct cam_periph *, union ccb *), 3573 u_int8_t tag_action, int immediate, int eot, 3574 int reten, int load, u_int8_t sense_len, 3575 u_int32_t timeout) 3576{ 3577 struct scsi_load_unload *scsi_cmd; 3578 3579 scsi_cmd = (struct scsi_load_unload *)&csio->cdb_io.cdb_bytes; 3580 bzero(scsi_cmd, sizeof(*scsi_cmd)); 3581 scsi_cmd->opcode = LOAD_UNLOAD; 3582 if (immediate) 3583 scsi_cmd->immediate = SLU_IMMED; 3584 if (eot) 3585 scsi_cmd->eot_reten_load |= SLU_EOT; 3586 if (reten) 3587 scsi_cmd->eot_reten_load |= SLU_RETEN; 3588 if (load) 3589 scsi_cmd->eot_reten_load |= SLU_LOAD; 3590 3591 cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, 3592 NULL, 0, sense_len, sizeof(*scsi_cmd), timeout); 3593} 3594 3595void 3596scsi_rewind(struct ccb_scsiio *csio, u_int32_t retries, 3597 void (*cbfcnp)(struct cam_periph *, union ccb *), 3598 u_int8_t tag_action, int immediate, u_int8_t sense_len, 3599 u_int32_t timeout) 3600{ 3601 struct scsi_rewind *scsi_cmd; 3602 3603 scsi_cmd = (struct scsi_rewind *)&csio->cdb_io.cdb_bytes; 3604 bzero(scsi_cmd, sizeof(*scsi_cmd)); 3605 scsi_cmd->opcode = REWIND; 3606 if (immediate) 3607 scsi_cmd->immediate = SREW_IMMED; 3608 3609 cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL, 3610 0, sense_len, sizeof(*scsi_cmd), timeout); 3611} 3612 3613void 3614scsi_space(struct ccb_scsiio *csio, u_int32_t retries, 3615 void (*cbfcnp)(struct cam_periph *, union ccb *), 3616 u_int8_t tag_action, scsi_space_code code, 3617 u_int32_t count, u_int8_t sense_len, u_int32_t timeout) 3618{ 3619 struct scsi_space *scsi_cmd; 3620 3621 scsi_cmd = (struct scsi_space *)&csio->cdb_io.cdb_bytes; 3622 scsi_cmd->opcode = SPACE; 3623 scsi_cmd->code = code; 3624 scsi_ulto3b(count, scsi_cmd->count); 3625 scsi_cmd->control = 0; 3626 3627 cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL, 3628 0, sense_len, sizeof(*scsi_cmd), timeout); 3629} 3630 3631void 3632scsi_write_filemarks(struct ccb_scsiio *csio, u_int32_t retries, 3633 void (*cbfcnp)(struct cam_periph *, union ccb *), 3634 u_int8_t tag_action, int immediate, int setmark, 3635 u_int32_t num_marks, u_int8_t sense_len, 3636 u_int32_t timeout) 3637{ 3638 struct scsi_write_filemarks *scsi_cmd; 3639 3640 scsi_cmd = (struct scsi_write_filemarks *)&csio->cdb_io.cdb_bytes; 3641 bzero(scsi_cmd, sizeof(*scsi_cmd)); 3642 scsi_cmd->opcode = WRITE_FILEMARKS; 3643 if (immediate) 3644 scsi_cmd->byte2 |= SWFMRK_IMMED; 3645 if (setmark) 3646 scsi_cmd->byte2 |= SWFMRK_WSMK; 3647 3648 scsi_ulto3b(num_marks, scsi_cmd->num_marks); 3649 3650 cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL, 3651 0, sense_len, sizeof(*scsi_cmd), timeout); 3652} 3653 3654/* 3655 * The reserve and release unit commands differ only by their opcodes. 3656 */ 3657void 3658scsi_reserve_release_unit(struct ccb_scsiio *csio, u_int32_t retries, 3659 void (*cbfcnp)(struct cam_periph *, union ccb *), 3660 u_int8_t tag_action, int third_party, 3661 int third_party_id, u_int8_t sense_len, 3662 u_int32_t timeout, int reserve) 3663{ 3664 struct scsi_reserve_release_unit *scsi_cmd; 3665 3666 scsi_cmd = (struct scsi_reserve_release_unit *)&csio->cdb_io.cdb_bytes; 3667 bzero(scsi_cmd, sizeof(*scsi_cmd)); 3668 3669 if (reserve) 3670 scsi_cmd->opcode = RESERVE_UNIT; 3671 else 3672 scsi_cmd->opcode = RELEASE_UNIT; 3673 3674 if (third_party) { 3675 scsi_cmd->lun_thirdparty |= SRRU_3RD_PARTY; 3676 scsi_cmd->lun_thirdparty |= 3677 ((third_party_id << SRRU_3RD_SHAMT) & SRRU_3RD_MASK); 3678 } 3679 3680 cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL, 3681 0, sense_len, sizeof(*scsi_cmd), timeout); 3682} 3683 3684void 3685scsi_erase(struct ccb_scsiio *csio, u_int32_t retries, 3686 void (*cbfcnp)(struct cam_periph *, union ccb *), 3687 u_int8_t tag_action, int immediate, int long_erase, 3688 u_int8_t sense_len, u_int32_t timeout) 3689{ 3690 struct scsi_erase *scsi_cmd; 3691 3692 scsi_cmd = (struct scsi_erase *)&csio->cdb_io.cdb_bytes; 3693 bzero(scsi_cmd, sizeof(*scsi_cmd)); 3694 3695 scsi_cmd->opcode = ERASE; 3696 3697 if (immediate) 3698 scsi_cmd->lun_imm_long |= SE_IMMED; 3699 3700 if (long_erase) 3701 scsi_cmd->lun_imm_long |= SE_LONG; 3702 3703 cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL, 3704 0, sense_len, sizeof(*scsi_cmd), timeout); 3705} 3706 3707/* 3708 * Read Tape Position command. 3709 */ 3710void 3711scsi_read_position(struct ccb_scsiio *csio, u_int32_t retries, 3712 void (*cbfcnp)(struct cam_periph *, union ccb *), 3713 u_int8_t tag_action, int hardsoft, 3714 struct scsi_tape_position_data *sbp, 3715 u_int8_t sense_len, u_int32_t timeout) 3716{ 3717 struct scsi_tape_read_position *scmd; 3718 3719 cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_IN, tag_action, 3720 (u_int8_t *)sbp, sizeof (*sbp), sense_len, sizeof(*scmd), timeout); 3721 scmd = (struct scsi_tape_read_position *)&csio->cdb_io.cdb_bytes; 3722 bzero(scmd, sizeof(*scmd)); 3723 scmd->opcode = READ_POSITION; 3724 scmd->byte1 = hardsoft; 3725} 3726 3727/* 3728 * Set Tape Position command. 3729 */ 3730void 3731scsi_set_position(struct ccb_scsiio *csio, u_int32_t retries, 3732 void (*cbfcnp)(struct cam_periph *, union ccb *), 3733 u_int8_t tag_action, int hardsoft, u_int32_t blkno, 3734 u_int8_t sense_len, u_int32_t timeout) 3735{ 3736 struct scsi_tape_locate *scmd; 3737 3738 cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, 3739 (u_int8_t *)NULL, 0, sense_len, sizeof(*scmd), timeout); 3740 scmd = (struct scsi_tape_locate *)&csio->cdb_io.cdb_bytes; 3741 bzero(scmd, sizeof(*scmd)); 3742 scmd->opcode = LOCATE; 3743 if (hardsoft) 3744 scmd->byte1 |= SA_SPOS_BT; 3745 scsi_ulto4b(blkno, scmd->blkaddr); 3746} 3747