1 /* 2 * $FreeBSD: src/sys/cam/scsi/scsi_sa.c,v 1.45.2.13 2002/12/17 17:08:50 trhodes Exp $ 3 * $DragonFly: src/sys/bus/cam/scsi/scsi_sa.c,v 1.36 2008/07/18 00:07:23 dillon Exp $ 4 * 5 * Implementation of SCSI Sequential Access Peripheral driver for CAM. 6 * 7 * Copyright (c) 1999, 2000 Matthew Jacob 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions, and the following disclaimer, 15 * without modification, immediately at the beginning of the file. 16 * 2. The name of the author may not be used to endorse or promote products 17 * derived from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 23 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 */ 32 33 #include <sys/param.h> 34 #include <sys/queue.h> 35 #ifdef _KERNEL 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #endif 39 #include <sys/types.h> 40 #ifdef _KERNEL 41 #include <sys/buf.h> 42 #include <sys/malloc.h> 43 #endif 44 #include <sys/mtio.h> 45 #include <sys/conf.h> 46 #ifdef _KERNEL 47 #include <sys/proc.h> 48 #include <sys/buf2.h> 49 #include <sys/thread2.h> 50 #endif 51 #include <sys/fcntl.h> 52 #include <sys/devicestat.h> 53 #include <machine/limits.h> 54 55 #ifndef _KERNEL 56 #include <stdio.h> 57 #include <string.h> 58 #endif 59 60 #include "../cam.h" 61 #include "../cam_ccb.h" 62 #include "../cam_extend.h" 63 #include "../cam_periph.h" 64 #include "../cam_xpt_periph.h" 65 #include "../cam_debug.h" 66 67 #include "scsi_all.h" 68 #include "scsi_message.h" 69 #include "scsi_sa.h" 70 71 #ifdef _KERNEL 72 73 #include <opt_sa.h> 74 75 #ifndef SA_IO_TIMEOUT 76 #define SA_IO_TIMEOUT 4 77 #endif 78 #ifndef SA_SPACE_TIMEOUT 79 #define SA_SPACE_TIMEOUT 1 * 60 80 #endif 81 #ifndef SA_REWIND_TIMEOUT 82 #define SA_REWIND_TIMEOUT 2 * 60 83 #endif 84 #ifndef SA_ERASE_TIMEOUT 85 #define SA_ERASE_TIMEOUT 4 * 60 86 #endif 87 88 #define SCSIOP_TIMEOUT (60 * 1000) /* not an option */ 89 90 #define IO_TIMEOUT (SA_IO_TIMEOUT * 60 * 1000) 91 #define REWIND_TIMEOUT (SA_REWIND_TIMEOUT * 60 * 1000) 92 #define ERASE_TIMEOUT (SA_ERASE_TIMEOUT * 60 * 1000) 93 #define SPACE_TIMEOUT (SA_SPACE_TIMEOUT * 60 * 1000) 94 95 /* 96 * Additional options that can be set for config: SA_1FM_AT_EOT 97 */ 98 99 #ifndef UNUSED_PARAMETER 100 #define UNUSED_PARAMETER(x) x = x 101 #endif 102 103 #define QFRLS(ccb) \ 104 if (((ccb)->ccb_h.status & CAM_DEV_QFRZN) != 0) \ 105 cam_release_devq((ccb)->ccb_h.path, 0, 0, 0, FALSE) 106 107 /* 108 * Driver states 109 */ 110 111 MALLOC_DEFINE(M_SCSISA, "SCSI sa", "SCSI sequential access buffers"); 112 113 typedef enum { 114 SA_STATE_NORMAL, SA_STATE_ABNORMAL 115 } sa_state; 116 117 #define ccb_pflags ppriv_field0 118 #define ccb_bio ppriv_ptr1 119 120 #define SA_CCB_BUFFER_IO 0x0 121 #define SA_CCB_WAITING 0x1 122 #define SA_CCB_TYPEMASK 0x1 123 #define SA_POSITION_UPDATED 0x2 124 125 #define Set_CCB_Type(x, type) \ 126 x->ccb_h.ccb_pflags &= ~SA_CCB_TYPEMASK; \ 127 x->ccb_h.ccb_pflags |= type 128 129 #define CCB_Type(x) (x->ccb_h.ccb_pflags & SA_CCB_TYPEMASK) 130 131 132 133 typedef enum { 134 SA_FLAG_OPEN = 0x0001, 135 SA_FLAG_FIXED = 0x0002, 136 SA_FLAG_TAPE_LOCKED = 0x0004, 137 SA_FLAG_TAPE_MOUNTED = 0x0008, 138 SA_FLAG_TAPE_WP = 0x0010, 139 SA_FLAG_TAPE_WRITTEN = 0x0020, 140 SA_FLAG_EOM_PENDING = 0x0040, 141 SA_FLAG_EIO_PENDING = 0x0080, 142 SA_FLAG_EOF_PENDING = 0x0100, 143 SA_FLAG_ERR_PENDING = (SA_FLAG_EOM_PENDING|SA_FLAG_EIO_PENDING| 144 SA_FLAG_EOF_PENDING), 145 SA_FLAG_INVALID = 0x0200, 146 SA_FLAG_COMP_ENABLED = 0x0400, 147 SA_FLAG_COMP_SUPP = 0x0800, 148 SA_FLAG_COMP_UNSUPP = 0x1000, 149 SA_FLAG_TAPE_FROZEN = 0x2000 150 } sa_flags; 151 152 typedef enum { 153 SA_MODE_REWIND = 0x00, 154 SA_MODE_NOREWIND = 0x01, 155 SA_MODE_OFFLINE = 0x02 156 } sa_mode; 157 158 typedef enum { 159 SA_PARAM_NONE = 0x00, 160 SA_PARAM_BLOCKSIZE = 0x01, 161 SA_PARAM_DENSITY = 0x02, 162 SA_PARAM_COMPRESSION = 0x04, 163 SA_PARAM_BUFF_MODE = 0x08, 164 SA_PARAM_NUMBLOCKS = 0x10, 165 SA_PARAM_WP = 0x20, 166 SA_PARAM_SPEED = 0x40, 167 SA_PARAM_ALL = 0x7f 168 } sa_params; 169 170 typedef enum { 171 SA_QUIRK_NONE = 0x00, 172 SA_QUIRK_NOCOMP = 0x01, /* Can't deal with compression at all */ 173 SA_QUIRK_FIXED = 0x02, /* Force fixed mode */ 174 SA_QUIRK_VARIABLE = 0x04, /* Force variable mode */ 175 SA_QUIRK_2FM = 0x08, /* Needs Two File Marks at EOD */ 176 SA_QUIRK_1FM = 0x10, /* No more than 1 File Mark at EOD */ 177 SA_QUIRK_NODREAD = 0x20, /* Don't try and dummy read density */ 178 SA_QUIRK_NO_MODESEL = 0x40, /* Don't do mode select at all */ 179 SA_QUIRK_NO_CPAGE = 0x80 /* Don't use DEVICE COMPRESSION page */ 180 } sa_quirks; 181 182 /* units are bits 4-7, 16-21 (1024 units) */ 183 #define SAUNIT(DEV) \ 184 (((minor(DEV) & 0xF0) >> 4) | ((minor(DEV) & 0x3f0000) >> 16)) 185 186 #define SAMODE(z) ((minor(z) & 0x3)) 187 #define SADENSITY(z) (((minor(z) >> 2) & 0x3)) 188 #define SA_IS_CTRL(z) (minor(z) & (1 << 29)) 189 190 #define SA_NOT_CTLDEV 0 191 #define SA_CTLDEV 1 192 193 #define SA_ATYPE_R 0 194 #define SA_ATYPE_NR 1 195 #define SA_ATYPE_ER 2 196 197 #define SAMINOR(ctl, unit, mode, access) \ 198 ((ctl << 29) | ((unit & 0x3f0) << 16) | ((unit & 0xf) << 4) | \ 199 (mode << 0x2) | (access & 0x3)) 200 201 #define SA_UNITMASK SAMINOR(0, -1, 0, 0) 202 #define SA_UNIT(unit) SAMINOR(0, unit, 0, 0) 203 204 #define SA_NUM_MODES 4 205 206 struct sa_softc { 207 sa_state state; 208 sa_flags flags; 209 sa_quirks quirks; 210 struct bio_queue_head bio_queue; 211 int queue_count; 212 struct devstat device_stats; 213 int blk_gran; 214 int blk_mask; 215 int blk_shift; 216 u_int32_t max_blk; 217 u_int32_t min_blk; 218 u_int32_t comp_algorithm; 219 u_int32_t saved_comp_algorithm; 220 u_int32_t media_blksize; 221 u_int32_t last_media_blksize; 222 u_int32_t media_numblks; 223 u_int8_t media_density; 224 u_int8_t speed; 225 u_int8_t scsi_rev; 226 u_int8_t dsreg; /* mtio mt_dsreg, redux */ 227 int buffer_mode; 228 int filemarks; 229 union ccb saved_ccb; 230 int last_resid_was_io; 231 232 /* 233 * Relative to BOT Location. 234 */ 235 daddr_t fileno; 236 daddr_t blkno; 237 238 /* 239 * Latched Error Info 240 */ 241 struct { 242 struct scsi_sense_data _last_io_sense; 243 u_int32_t _last_io_resid; 244 u_int8_t _last_io_cdb[CAM_MAX_CDBLEN]; 245 struct scsi_sense_data _last_ctl_sense; 246 u_int32_t _last_ctl_resid; 247 u_int8_t _last_ctl_cdb[CAM_MAX_CDBLEN]; 248 #define last_io_sense errinfo._last_io_sense 249 #define last_io_resid errinfo._last_io_resid 250 #define last_io_cdb errinfo._last_io_cdb 251 #define last_ctl_sense errinfo._last_ctl_sense 252 #define last_ctl_resid errinfo._last_ctl_resid 253 #define last_ctl_cdb errinfo._last_ctl_cdb 254 } errinfo; 255 /* 256 * Misc other flags/state 257 */ 258 u_int32_t 259 : 29, 260 open_rdonly : 1, /* open read-only */ 261 open_pending_mount : 1, /* open pending mount */ 262 ctrl_mode : 1; /* control device open */ 263 }; 264 265 struct sa_quirk_entry { 266 struct scsi_inquiry_pattern inq_pat; /* matching pattern */ 267 sa_quirks quirks; /* specific quirk type */ 268 u_int32_t prefblk; /* preferred blocksize when in fixed mode */ 269 }; 270 271 static struct sa_quirk_entry sa_quirk_table[] = 272 { 273 { 274 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "OnStream", 275 "ADR*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_NODREAD | 276 SA_QUIRK_1FM|SA_QUIRK_NO_MODESEL, 32768 277 }, 278 { 279 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE", 280 "Python 06408*", "*"}, SA_QUIRK_NODREAD, 0 281 }, 282 { 283 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE", 284 "Python 25601*", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_NODREAD, 0 285 }, 286 { 287 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE", 288 "Python*", "*"}, SA_QUIRK_NODREAD, 0 289 }, 290 { 291 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE", 292 "VIPER 150*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512 293 }, 294 { 295 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE", 296 "VIPER 2525 25462", "-011"}, 297 SA_QUIRK_NOCOMP|SA_QUIRK_1FM|SA_QUIRK_NODREAD, 0 298 }, 299 { 300 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE", 301 "VIPER 2525*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 1024 302 }, 303 #if 0 304 { 305 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP", 306 "C15*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_NO_CPAGE, 0, 307 }, 308 #endif 309 { 310 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP", 311 "C56*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0 312 }, 313 { 314 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP", 315 "T20*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512 316 }, 317 { 318 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP", 319 "T4000*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512 320 }, 321 { 322 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP", 323 "HP-88780*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0 324 }, 325 { 326 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "KENNEDY", 327 "*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0 328 }, 329 { 330 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "M4 DATA", 331 "123107 SCSI*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0 332 }, 333 { /* jreynold@primenet.com */ 334 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "Seagate", 335 "STT8000N*", "*"}, SA_QUIRK_1FM, 0 336 }, 337 { /* mike@sentex.net */ 338 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "Seagate", 339 "STT20000*", "*"}, SA_QUIRK_1FM, 0 340 }, 341 { 342 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG", 343 " TDC 3600", "U07:"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512 344 }, 345 { 346 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG", 347 " TDC 3800", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512 348 }, 349 { 350 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG", 351 " TDC 4100", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512 352 }, 353 { 354 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG", 355 " TDC 4200", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512 356 }, 357 { 358 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG", 359 " SLR*", "*"}, SA_QUIRK_1FM, 0 360 }, 361 { 362 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "WANGTEK", 363 "5525ES*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512 364 }, 365 { 366 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "WANGTEK", 367 "51000*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 1024 368 } 369 }; 370 371 static d_open_t saopen; 372 static d_close_t saclose; 373 static d_strategy_t sastrategy; 374 static d_ioctl_t saioctl; 375 static periph_init_t sainit; 376 static periph_ctor_t saregister; 377 static periph_oninv_t saoninvalidate; 378 static periph_dtor_t sacleanup; 379 static periph_start_t sastart; 380 static void saasync(void *callback_arg, u_int32_t code, 381 struct cam_path *path, void *arg); 382 static void sadone(struct cam_periph *periph, 383 union ccb *start_ccb); 384 static int saerror(union ccb *ccb, u_int32_t cam_flags, 385 u_int32_t sense_flags); 386 static int samarkswanted(struct cam_periph *); 387 static int sacheckeod(struct cam_periph *periph); 388 static int sagetparams(struct cam_periph *periph, 389 sa_params params_to_get, 390 u_int32_t *blocksize, u_int8_t *density, 391 u_int32_t *numblocks, int *buff_mode, 392 u_int8_t *write_protect, u_int8_t *speed, 393 int *comp_supported, int *comp_enabled, 394 u_int32_t *comp_algorithm, 395 sa_comp_t *comp_page); 396 static int sasetparams(struct cam_periph *periph, 397 sa_params params_to_set, 398 u_int32_t blocksize, u_int8_t density, 399 u_int32_t comp_algorithm, 400 u_int32_t sense_flags); 401 static void saprevent(struct cam_periph *periph, int action); 402 static int sarewind(struct cam_periph *periph); 403 static int saspace(struct cam_periph *periph, int count, 404 scsi_space_code code); 405 static int samount(struct cam_periph *, int, cdev_t); 406 static int saretension(struct cam_periph *periph); 407 static int sareservereleaseunit(struct cam_periph *periph, 408 int reserve); 409 static int saloadunload(struct cam_periph *periph, int load); 410 static int saerase(struct cam_periph *periph, int longerase); 411 static int sawritefilemarks(struct cam_periph *periph, 412 int nmarks, int setmarks); 413 static int sardpos(struct cam_periph *periph, int, u_int32_t *); 414 static int sasetpos(struct cam_periph *periph, int, u_int32_t *); 415 416 417 static struct periph_driver sadriver = 418 { 419 sainit, "sa", 420 TAILQ_HEAD_INITIALIZER(sadriver.units), /* generation */ 0 421 }; 422 423 PERIPHDRIVER_DECLARE(sa, sadriver); 424 425 /* For 2.2-stable support */ 426 #ifndef D_TAPE 427 #define D_TAPE 0 428 #endif 429 430 #define SA_CDEV_MAJOR 14 431 432 static struct dev_ops sa_ops = { 433 { "sa", SA_CDEV_MAJOR, D_TAPE }, 434 .d_open = saopen, 435 .d_close = saclose, 436 .d_read = physread, 437 .d_write = physwrite, 438 .d_ioctl = saioctl, 439 .d_strategy = sastrategy, 440 }; 441 442 static struct extend_array *saperiphs; 443 444 static int 445 saopen(struct dev_open_args *ap) 446 { 447 cdev_t dev = ap->a_head.a_dev; 448 struct cam_periph *periph; 449 struct sa_softc *softc; 450 int unit; 451 int error; 452 453 unit = SAUNIT(dev); 454 455 periph = cam_extend_get(saperiphs, unit); 456 if (cam_periph_acquire(periph) != CAM_REQ_CMP) { 457 return (ENXIO); 458 } 459 460 cam_periph_lock(periph); 461 462 softc = (struct sa_softc *)periph->softc; 463 464 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE|CAM_DEBUG_INFO, 465 ("saopen(%d): dev=0x%x softc=0x%x\n", unit, unit, softc->flags)); 466 467 if (SA_IS_CTRL(dev)) { 468 softc->ctrl_mode = 1; 469 cam_periph_unlock(periph); 470 return (0); 471 } 472 473 if ((error = cam_periph_hold(periph, PCATCH)) != 0) { 474 cam_periph_unlock(periph); 475 cam_periph_release(periph); 476 return (error); 477 } 478 479 if (softc->flags & SA_FLAG_OPEN) { 480 error = EBUSY; 481 } else if (softc->flags & SA_FLAG_INVALID) { 482 error = ENXIO; 483 } else { 484 /* 485 * Preserve whether this is a read_only open. 486 */ 487 softc->open_rdonly = (ap->a_oflags & O_RDWR) == O_RDONLY; 488 489 /* 490 * The function samount ensures media is loaded and ready. 491 * It also does a device RESERVE if the tape isn't yet mounted. 492 * 493 * If the mount fails and this was a non-blocking open, 494 * make this a 'open_pending_mount' action. 495 */ 496 error = samount(periph, ap->a_oflags, dev); 497 if (error && (ap->a_oflags & O_NONBLOCK)) { 498 softc->flags |= SA_FLAG_OPEN; 499 softc->open_pending_mount = 1; 500 cam_periph_unhold(periph, 1); 501 return (0); 502 } 503 } 504 505 if (error) { 506 cam_periph_unhold(periph, 1); 507 cam_periph_release(periph); 508 return (error); 509 } 510 511 saprevent(periph, PR_PREVENT); 512 softc->flags |= SA_FLAG_OPEN; 513 514 cam_periph_unhold(periph, 1); 515 return (error); 516 } 517 518 static int 519 saclose(struct dev_close_args *ap) 520 { 521 cdev_t dev = ap->a_head.a_dev; 522 struct cam_periph *periph; 523 struct sa_softc *softc; 524 int unit, mode, error, writing, tmp; 525 int closedbits = SA_FLAG_OPEN; 526 527 unit = SAUNIT(dev); 528 mode = SAMODE(dev); 529 periph = cam_extend_get(saperiphs, unit); 530 if (periph == NULL) 531 return (ENXIO); 532 533 cam_periph_lock(periph); 534 535 softc = (struct sa_softc *)periph->softc; 536 537 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE|CAM_DEBUG_INFO, 538 ("saclose(%d): dev=0x%x softc=0x%x\n", unit, unit, softc->flags)); 539 540 541 softc->open_rdonly = 0; 542 if (SA_IS_CTRL(dev)) { 543 softc->ctrl_mode = 0; 544 cam_periph_unlock(periph); 545 cam_periph_release(periph); 546 return (0); 547 } 548 549 if (softc->open_pending_mount) { 550 softc->flags &= ~SA_FLAG_OPEN; 551 softc->open_pending_mount = 0; 552 cam_periph_unlock(periph); 553 cam_periph_release(periph); 554 return (0); 555 } 556 557 if ((error = cam_periph_hold(periph, 0)) != 0) { 558 cam_periph_unlock(periph); 559 return (error); 560 } 561 562 /* 563 * Were we writing the tape? 564 */ 565 writing = (softc->flags & SA_FLAG_TAPE_WRITTEN) != 0; 566 567 /* 568 * See whether or not we need to write filemarks. If this 569 * fails, we probably have to assume we've lost tape 570 * position. 571 */ 572 error = sacheckeod(periph); 573 if (error) { 574 xpt_print(periph->path, 575 "failed to write terminating filemark(s)\n"); 576 softc->flags |= SA_FLAG_TAPE_FROZEN; 577 } 578 579 /* 580 * Whatever we end up doing, allow users to eject tapes from here on. 581 */ 582 saprevent(periph, PR_ALLOW); 583 584 /* 585 * Decide how to end... 586 */ 587 if ((softc->flags & SA_FLAG_TAPE_MOUNTED) == 0) { 588 closedbits |= SA_FLAG_TAPE_FROZEN; 589 } else switch (mode) { 590 case SA_MODE_OFFLINE: 591 /* 592 * An 'offline' close is an unconditional release of 593 * frozen && mount conditions, irrespective of whether 594 * these operations succeeded. The reason for this is 595 * to allow at least some kind of programmatic way 596 * around our state getting all fouled up. If somebody 597 * issues an 'offline' command, that will be allowed 598 * to clear state. 599 */ 600 sarewind(periph); 601 saloadunload(periph, FALSE); 602 closedbits |= SA_FLAG_TAPE_MOUNTED|SA_FLAG_TAPE_FROZEN; 603 break; 604 case SA_MODE_REWIND: 605 /* 606 * If the rewind fails, return an error- if anyone cares, 607 * but not overwriting any previous error. 608 * 609 * We don't clear the notion of mounted here, but we do 610 * clear the notion of frozen if we successfully rewound. 611 */ 612 tmp = sarewind(periph); 613 if (tmp) { 614 if (error != 0) 615 error = tmp; 616 } else { 617 closedbits |= SA_FLAG_TAPE_FROZEN; 618 } 619 break; 620 case SA_MODE_NOREWIND: 621 /* 622 * If we're not rewinding/unloading the tape, find out 623 * whether we need to back up over one of two filemarks 624 * we wrote (if we wrote two filemarks) so that appends 625 * from this point on will be sane. 626 */ 627 if (error == 0 && writing && (softc->quirks & SA_QUIRK_2FM)) { 628 tmp = saspace(periph, -1, SS_FILEMARKS); 629 if (tmp) { 630 xpt_print(periph->path, "unable to backspace " 631 "over one of double filemarks at end of " 632 "tape\n"); 633 xpt_print(periph->path, "it is possible that " 634 "this device needs a SA_QUIRK_1FM quirk set" 635 "for it\n"); 636 softc->flags |= SA_FLAG_TAPE_FROZEN; 637 } 638 } 639 break; 640 default: 641 xpt_print(periph->path, "unknown mode 0x%x in saclose\n", mode); 642 /* NOTREACHED */ 643 break; 644 } 645 646 /* 647 * We wish to note here that there are no more filemarks to be written. 648 */ 649 softc->filemarks = 0; 650 softc->flags &= ~SA_FLAG_TAPE_WRITTEN; 651 652 /* 653 * And we are no longer open for business. 654 */ 655 softc->flags &= ~closedbits; 656 657 /* 658 * Inform users if tape state if frozen.... 659 */ 660 if (softc->flags & SA_FLAG_TAPE_FROZEN) { 661 xpt_print(periph->path, "tape is now frozen- use an OFFLINE, " 662 "REWIND or MTEOM command to clear this state.\n"); 663 } 664 665 /* release the device if it is no longer mounted */ 666 if ((softc->flags & SA_FLAG_TAPE_MOUNTED) == 0) 667 sareservereleaseunit(periph, FALSE); 668 669 cam_periph_unhold(periph, 1); 670 cam_periph_release(periph); 671 672 return (error); 673 } 674 675 /* 676 * Actually translate the requested transfer into one the physical driver 677 * can understand. The transfer is described by a buf and will include 678 * only one physical transfer. 679 */ 680 static int 681 sastrategy(struct dev_strategy_args *ap) 682 { 683 cdev_t dev = ap->a_head.a_dev; 684 struct bio *bio = ap->a_bio; 685 struct buf *bp = bio->bio_buf; 686 struct cam_periph *periph; 687 struct sa_softc *softc; 688 u_int unit; 689 690 if (SA_IS_CTRL(dev)) { 691 bp->b_error = EINVAL; 692 goto bad; 693 } 694 unit = SAUNIT(dev); 695 periph = cam_extend_get(saperiphs, unit); 696 if (periph == NULL) { 697 bp->b_error = ENXIO; 698 goto bad; 699 } 700 cam_periph_lock(periph); 701 702 softc = (struct sa_softc *)periph->softc; 703 704 if (softc->flags & SA_FLAG_INVALID) { 705 cam_periph_unlock(periph); 706 bp->b_error = ENXIO; 707 goto bad; 708 } 709 710 if (softc->flags & SA_FLAG_TAPE_FROZEN) { 711 cam_periph_unlock(periph); 712 bp->b_error = EPERM; 713 goto bad; 714 } 715 716 /* 717 * This should actually never occur as the write(2) 718 * system call traps attempts to write to a read-only 719 * file descriptor. 720 */ 721 if (bp->b_cmd == BUF_CMD_WRITE && softc->open_rdonly) { 722 cam_periph_unlock(periph); 723 bp->b_error = EBADF; 724 goto bad; 725 } 726 727 if (softc->open_pending_mount) { 728 int error = samount(periph, 0, dev); 729 if (error) { 730 cam_periph_unlock(periph); 731 bp->b_error = ENXIO; 732 goto bad; 733 } 734 saprevent(periph, PR_PREVENT); 735 softc->open_pending_mount = 0; 736 } 737 738 /* 739 * If it's a null transfer, return immediately 740 */ 741 if (bp->b_bcount == 0) { 742 cam_periph_unlock(periph); 743 goto done; 744 } 745 746 /* valid request? */ 747 if (softc->flags & SA_FLAG_FIXED) { 748 /* 749 * Fixed block device. The byte count must 750 * be a multiple of our block size. 751 */ 752 if (((softc->blk_mask != ~0) && 753 ((bp->b_bcount & softc->blk_mask) != 0)) || 754 ((softc->blk_mask == ~0) && 755 ((bp->b_bcount % softc->min_blk) != 0))) { 756 xpt_print(periph->path, "Invalid request. Fixed block " 757 "device requests must be a multiple of %d bytes\n", 758 softc->min_blk); 759 cam_periph_unlock(periph); 760 bp->b_error = EINVAL; 761 goto bad; 762 } 763 } else if ((bp->b_bcount > softc->max_blk) || 764 (bp->b_bcount < softc->min_blk) || 765 (bp->b_bcount & softc->blk_mask) != 0) { 766 767 xpt_print_path(periph->path); 768 kprintf("Invalid request. Variable block " 769 "device requests must be "); 770 if (softc->blk_mask != 0) { 771 kprintf("a multiple of %d ", (0x1 << softc->blk_gran)); 772 } 773 kprintf("between %d and %d bytes\n", softc->min_blk, 774 softc->max_blk); 775 cam_periph_unlock(periph); 776 bp->b_error = EINVAL; 777 goto bad; 778 } 779 780 /* 781 * Place it at the end of the queue. 782 */ 783 bioq_insert_tail(&softc->bio_queue, bio); 784 softc->queue_count++; 785 #if 0 786 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 787 ("sastrategy: queuing a %ld %s byte %s\n", bp->bio_bcount, 788 (softc->flags & SA_FLAG_FIXED)? "fixed" : "variable", 789 (bp->bio_cmd == BIO_READ)? "read" : "write")); 790 #endif 791 if (softc->queue_count > 1) { 792 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 793 ("sastrategy: queue count now %d\n", softc->queue_count)); 794 } 795 796 /* 797 * Schedule ourselves for performing the work. 798 */ 799 xpt_schedule(periph, 1); 800 cam_periph_unlock(periph); 801 802 return(0); 803 bad: 804 bp->b_flags |= B_ERROR; 805 done: 806 807 /* 808 * Correctly set the buf to indicate a completed xfer 809 */ 810 bp->b_resid = bp->b_bcount; 811 biodone(bio); 812 return(0); 813 } 814 815 816 #define PENDING_MOUNT_CHECK(softc, periph, dev) \ 817 if (softc->open_pending_mount) { \ 818 error = samount(periph, 0, dev); \ 819 if (error) { \ 820 break; \ 821 } \ 822 saprevent(periph, PR_PREVENT); \ 823 softc->open_pending_mount = 0; \ 824 } 825 826 static int 827 saioctl(struct dev_ioctl_args *ap) 828 { 829 cdev_t dev = ap->a_head.a_dev; 830 caddr_t addr = ap->a_data; 831 struct cam_periph *periph; 832 struct sa_softc *softc; 833 scsi_space_code spaceop; 834 int didholdperiph = 0; 835 int unit; 836 int mode; 837 int error = 0; 838 839 unit = SAUNIT(dev); 840 mode = SAMODE(dev); 841 error = 0; /* shut up gcc */ 842 spaceop = 0; /* shut up gcc */ 843 844 periph = cam_extend_get(saperiphs, unit); 845 if (periph == NULL) 846 return (ENXIO); 847 848 cam_periph_lock(periph); 849 softc = (struct sa_softc *)periph->softc; 850 851 /* 852 * Check for control mode accesses. We allow MTIOCGET and 853 * MTIOCERRSTAT (but need to be the only one open in order 854 * to clear latched status), and MTSETBSIZE, MTSETDNSTY 855 * and MTCOMP (but need to be the only one accessing this 856 * device to run those). 857 */ 858 859 if (SA_IS_CTRL(dev)) { 860 switch (ap->a_cmd) { 861 case MTIOCGETEOTMODEL: 862 case MTIOCGET: 863 break; 864 case MTIOCERRSTAT: 865 /* 866 * If the periph isn't already locked, lock it 867 * so our MTIOCERRSTAT can reset latched error stats. 868 * 869 * If the periph is already locked, skip it because 870 * we're just getting status and it'll be up to the 871 * other thread that has this device open to do 872 * an MTIOCERRSTAT that would clear latched status. 873 */ 874 if ((periph->flags & CAM_PERIPH_LOCKED) == 0) { 875 error = cam_periph_hold(periph, PCATCH); 876 if (error != 0) { 877 return (error); 878 } 879 didholdperiph = 1; 880 } 881 break; 882 883 case MTIOCTOP: 884 { 885 struct mtop *mt = (struct mtop *) addr; 886 887 /* 888 * Check to make sure it's an OP we can perform 889 * with no media inserted. 890 */ 891 switch (mt->mt_op) { 892 case MTSETBSIZ: 893 case MTSETDNSTY: 894 case MTCOMP: 895 mt = NULL; 896 /* FALLTHROUGH */ 897 default: 898 break; 899 } 900 if (mt != NULL) { 901 break; 902 } 903 /* FALLTHROUGH */ 904 } 905 case MTIOCSETEOTMODEL: 906 /* 907 * We need to acquire the peripheral here rather 908 * than at open time because we are sharing writable 909 * access to data structures. 910 */ 911 error = cam_periph_hold(periph, PCATCH); 912 if (error != 0) { 913 return (error); 914 } 915 didholdperiph = 1; 916 break; 917 918 default: 919 return (EINVAL); 920 } 921 } 922 923 /* 924 * Find the device that the user is talking about 925 */ 926 switch (ap->a_cmd) { 927 case MTIOCGET: 928 { 929 struct mtget *g = (struct mtget *)addr; 930 931 /* 932 * If this isn't the control mode device, actually go out 933 * and ask the drive again what it's set to. 934 */ 935 if (!SA_IS_CTRL(dev) && !softc->open_pending_mount) { 936 u_int8_t write_protect = 0; /* silence gcc */ 937 int comp_enabled = 0; /* silence gcc */ 938 int comp_supported = 0; /* silence gcc */ 939 940 error = sagetparams(periph, SA_PARAM_ALL, 941 &softc->media_blksize, &softc->media_density, 942 &softc->media_numblks, &softc->buffer_mode, 943 &write_protect, &softc->speed, &comp_supported, 944 &comp_enabled, &softc->comp_algorithm, NULL); 945 if (error) 946 break; 947 if (write_protect) 948 softc->flags |= SA_FLAG_TAPE_WP; 949 else 950 softc->flags &= ~SA_FLAG_TAPE_WP; 951 softc->flags &= ~(SA_FLAG_COMP_SUPP| 952 SA_FLAG_COMP_ENABLED|SA_FLAG_COMP_UNSUPP); 953 if (comp_supported) { 954 if (softc->saved_comp_algorithm == 0) 955 softc->saved_comp_algorithm = 956 softc->comp_algorithm; 957 softc->flags |= SA_FLAG_COMP_SUPP; 958 if (comp_enabled) 959 softc->flags |= SA_FLAG_COMP_ENABLED; 960 } else 961 softc->flags |= SA_FLAG_COMP_UNSUPP; 962 } 963 bzero(g, sizeof(struct mtget)); 964 g->mt_type = MT_ISAR; 965 if (softc->flags & SA_FLAG_COMP_UNSUPP) { 966 g->mt_comp = MT_COMP_UNSUPP; 967 g->mt_comp0 = MT_COMP_UNSUPP; 968 g->mt_comp1 = MT_COMP_UNSUPP; 969 g->mt_comp2 = MT_COMP_UNSUPP; 970 g->mt_comp3 = MT_COMP_UNSUPP; 971 } else { 972 if ((softc->flags & SA_FLAG_COMP_ENABLED) == 0) { 973 g->mt_comp = MT_COMP_DISABLED; 974 } else { 975 g->mt_comp = softc->comp_algorithm; 976 } 977 g->mt_comp0 = softc->comp_algorithm; 978 g->mt_comp1 = softc->comp_algorithm; 979 g->mt_comp2 = softc->comp_algorithm; 980 g->mt_comp3 = softc->comp_algorithm; 981 } 982 g->mt_density = softc->media_density; 983 g->mt_density0 = softc->media_density; 984 g->mt_density1 = softc->media_density; 985 g->mt_density2 = softc->media_density; 986 g->mt_density3 = softc->media_density; 987 g->mt_blksiz = softc->media_blksize; 988 g->mt_blksiz0 = softc->media_blksize; 989 g->mt_blksiz1 = softc->media_blksize; 990 g->mt_blksiz2 = softc->media_blksize; 991 g->mt_blksiz3 = softc->media_blksize; 992 g->mt_fileno = softc->fileno; 993 g->mt_blkno = softc->blkno; 994 g->mt_dsreg = (short) softc->dsreg; 995 /* 996 * Yes, we know that this is likely to overflow 997 */ 998 if (softc->last_resid_was_io) { 999 if ((g->mt_resid = (short) softc->last_io_resid) != 0) { 1000 if (SA_IS_CTRL(dev) == 0 || didholdperiph) { 1001 softc->last_io_resid = 0; 1002 } 1003 } 1004 } else { 1005 if ((g->mt_resid = (short)softc->last_ctl_resid) != 0) { 1006 if (SA_IS_CTRL(dev) == 0 || didholdperiph) { 1007 softc->last_ctl_resid = 0; 1008 } 1009 } 1010 } 1011 error = 0; 1012 break; 1013 } 1014 case MTIOCERRSTAT: 1015 { 1016 struct scsi_tape_errors *sep = 1017 &((union mterrstat *)addr)->scsi_errstat; 1018 1019 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, 1020 ("saioctl: MTIOCERRSTAT\n")); 1021 1022 bzero(sep, sizeof(*sep)); 1023 sep->io_resid = softc->last_io_resid; 1024 bcopy((caddr_t) &softc->last_io_sense, sep->io_sense, 1025 sizeof (sep->io_sense)); 1026 bcopy((caddr_t) &softc->last_io_cdb, sep->io_cdb, 1027 sizeof (sep->io_cdb)); 1028 sep->ctl_resid = softc->last_ctl_resid; 1029 bcopy((caddr_t) &softc->last_ctl_sense, sep->ctl_sense, 1030 sizeof (sep->ctl_sense)); 1031 bcopy((caddr_t) &softc->last_ctl_cdb, sep->ctl_cdb, 1032 sizeof (sep->ctl_cdb)); 1033 1034 if ((SA_IS_CTRL(dev) == 0 && softc->open_pending_mount) || 1035 didholdperiph) 1036 bzero((caddr_t) &softc->errinfo, 1037 sizeof (softc->errinfo)); 1038 error = 0; 1039 break; 1040 } 1041 case MTIOCTOP: 1042 { 1043 struct mtop *mt; 1044 int count; 1045 1046 PENDING_MOUNT_CHECK(softc, periph, dev); 1047 1048 mt = (struct mtop *)addr; 1049 1050 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, 1051 ("saioctl: op=0x%x count=0x%x\n", 1052 mt->mt_op, mt->mt_count)); 1053 1054 count = mt->mt_count; 1055 switch (mt->mt_op) { 1056 case MTWEOF: /* write an end-of-file marker */ 1057 /* 1058 * We don't need to clear the SA_FLAG_TAPE_WRITTEN 1059 * flag because by keeping track of filemarks 1060 * we have last written we know ehether or not 1061 * we need to write more when we close the device. 1062 */ 1063 error = sawritefilemarks(periph, count, FALSE); 1064 break; 1065 case MTWSS: /* write a setmark */ 1066 error = sawritefilemarks(periph, count, TRUE); 1067 break; 1068 case MTBSR: /* backward space record */ 1069 case MTFSR: /* forward space record */ 1070 case MTBSF: /* backward space file */ 1071 case MTFSF: /* forward space file */ 1072 case MTBSS: /* backward space setmark */ 1073 case MTFSS: /* forward space setmark */ 1074 case MTEOD: /* space to end of recorded medium */ 1075 { 1076 int nmarks; 1077 1078 spaceop = SS_FILEMARKS; 1079 nmarks = softc->filemarks; 1080 error = sacheckeod(periph); 1081 if (error) { 1082 xpt_print(periph->path, 1083 "EOD check prior to spacing failed\n"); 1084 softc->flags |= SA_FLAG_EIO_PENDING; 1085 break; 1086 } 1087 nmarks -= softc->filemarks; 1088 switch(mt->mt_op) { 1089 case MTBSR: 1090 count = -count; 1091 /* FALLTHROUGH */ 1092 case MTFSR: 1093 spaceop = SS_BLOCKS; 1094 break; 1095 case MTBSF: 1096 count = -count; 1097 /* FALLTHROUGH */ 1098 case MTFSF: 1099 break; 1100 case MTBSS: 1101 count = -count; 1102 /* FALLTHROUGH */ 1103 case MTFSS: 1104 spaceop = SS_SETMARKS; 1105 break; 1106 case MTEOD: 1107 spaceop = SS_EOD; 1108 count = 0; 1109 nmarks = 0; 1110 break; 1111 default: 1112 error = EINVAL; 1113 break; 1114 } 1115 if (error) 1116 break; 1117 1118 nmarks = softc->filemarks; 1119 /* 1120 * XXX: Why are we checking again? 1121 */ 1122 error = sacheckeod(periph); 1123 if (error) 1124 break; 1125 nmarks -= softc->filemarks; 1126 error = saspace(periph, count - nmarks, spaceop); 1127 /* 1128 * At this point, clear that we've written the tape 1129 * and that we've written any filemarks. We really 1130 * don't know what the applications wishes to do next- 1131 * the sacheckeod's will make sure we terminated the 1132 * tape correctly if we'd been writing, but the next 1133 * action the user application takes will set again 1134 * whether we need to write filemarks. 1135 */ 1136 softc->flags &= 1137 ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN); 1138 softc->filemarks = 0; 1139 break; 1140 } 1141 case MTREW: /* rewind */ 1142 PENDING_MOUNT_CHECK(softc, periph, dev); 1143 sacheckeod(periph); 1144 error = sarewind(periph); 1145 /* see above */ 1146 softc->flags &= 1147 ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN); 1148 softc->flags &= ~SA_FLAG_ERR_PENDING; 1149 softc->filemarks = 0; 1150 break; 1151 case MTERASE: /* erase */ 1152 PENDING_MOUNT_CHECK(softc, periph, dev); 1153 error = saerase(periph, count); 1154 softc->flags &= 1155 ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN); 1156 softc->flags &= ~SA_FLAG_ERR_PENDING; 1157 break; 1158 case MTRETENS: /* re-tension tape */ 1159 PENDING_MOUNT_CHECK(softc, periph, dev); 1160 error = saretension(periph); 1161 softc->flags &= 1162 ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN); 1163 softc->flags &= ~SA_FLAG_ERR_PENDING; 1164 break; 1165 case MTOFFL: /* rewind and put the drive offline */ 1166 1167 PENDING_MOUNT_CHECK(softc, periph, dev); 1168 1169 sacheckeod(periph); 1170 /* see above */ 1171 softc->flags &= ~SA_FLAG_TAPE_WRITTEN; 1172 softc->filemarks = 0; 1173 1174 error = sarewind(periph); 1175 /* clear the frozen flag anyway */ 1176 softc->flags &= ~SA_FLAG_TAPE_FROZEN; 1177 1178 /* 1179 * Be sure to allow media removal before ejecting. 1180 */ 1181 1182 saprevent(periph, PR_ALLOW); 1183 if (error == 0) { 1184 error = saloadunload(periph, FALSE); 1185 if (error == 0) { 1186 softc->flags &= ~SA_FLAG_TAPE_MOUNTED; 1187 } 1188 } 1189 break; 1190 1191 case MTNOP: /* no operation, sets status only */ 1192 case MTCACHE: /* enable controller cache */ 1193 case MTNOCACHE: /* disable controller cache */ 1194 error = 0; 1195 break; 1196 1197 case MTSETBSIZ: /* Set block size for device */ 1198 1199 PENDING_MOUNT_CHECK(softc, periph, dev); 1200 1201 error = sasetparams(periph, SA_PARAM_BLOCKSIZE, count, 1202 0, 0, 0); 1203 if (error == 0) { 1204 softc->last_media_blksize = 1205 softc->media_blksize; 1206 softc->media_blksize = count; 1207 if (count) { 1208 softc->flags |= SA_FLAG_FIXED; 1209 if (powerof2(count)) { 1210 softc->blk_shift = 1211 ffs(count) - 1; 1212 softc->blk_mask = count - 1; 1213 } else { 1214 softc->blk_mask = ~0; 1215 softc->blk_shift = 0; 1216 } 1217 /* 1218 * Make the user's desire 'persistent'. 1219 */ 1220 softc->quirks &= ~SA_QUIRK_VARIABLE; 1221 softc->quirks |= SA_QUIRK_FIXED; 1222 } else { 1223 softc->flags &= ~SA_FLAG_FIXED; 1224 if (softc->max_blk == 0) { 1225 softc->max_blk = ~0; 1226 } 1227 softc->blk_shift = 0; 1228 if (softc->blk_gran != 0) { 1229 softc->blk_mask = 1230 softc->blk_gran - 1; 1231 } else { 1232 softc->blk_mask = 0; 1233 } 1234 /* 1235 * Make the user's desire 'persistent'. 1236 */ 1237 softc->quirks |= SA_QUIRK_VARIABLE; 1238 softc->quirks &= ~SA_QUIRK_FIXED; 1239 } 1240 } 1241 break; 1242 case MTSETDNSTY: /* Set density for device and mode */ 1243 PENDING_MOUNT_CHECK(softc, periph, dev); 1244 1245 if (count > UCHAR_MAX) { 1246 error = EINVAL; 1247 break; 1248 } else { 1249 error = sasetparams(periph, SA_PARAM_DENSITY, 1250 0, count, 0, 0); 1251 } 1252 break; 1253 case MTCOMP: /* enable compression */ 1254 PENDING_MOUNT_CHECK(softc, periph, dev); 1255 /* 1256 * Some devices don't support compression, and 1257 * don't like it if you ask them for the 1258 * compression page. 1259 */ 1260 if ((softc->quirks & SA_QUIRK_NOCOMP) || 1261 (softc->flags & SA_FLAG_COMP_UNSUPP)) { 1262 error = ENODEV; 1263 break; 1264 } 1265 error = sasetparams(periph, SA_PARAM_COMPRESSION, 1266 0, 0, count, SF_NO_PRINT); 1267 break; 1268 default: 1269 error = EINVAL; 1270 } 1271 break; 1272 } 1273 case MTIOCIEOT: 1274 case MTIOCEEOT: 1275 error = 0; 1276 break; 1277 case MTIOCRDSPOS: 1278 PENDING_MOUNT_CHECK(softc, periph, dev); 1279 error = sardpos(periph, 0, (u_int32_t *) addr); 1280 break; 1281 case MTIOCRDHPOS: 1282 PENDING_MOUNT_CHECK(softc, periph, dev); 1283 error = sardpos(periph, 1, (u_int32_t *) addr); 1284 break; 1285 case MTIOCSLOCATE: 1286 PENDING_MOUNT_CHECK(softc, periph, dev); 1287 error = sasetpos(periph, 0, (u_int32_t *) addr); 1288 break; 1289 case MTIOCHLOCATE: 1290 PENDING_MOUNT_CHECK(softc, periph, dev); 1291 error = sasetpos(periph, 1, (u_int32_t *) addr); 1292 break; 1293 case MTIOCGETEOTMODEL: 1294 error = 0; 1295 if (softc->quirks & SA_QUIRK_1FM) 1296 mode = 1; 1297 else 1298 mode = 2; 1299 *((u_int32_t *) addr) = mode; 1300 break; 1301 case MTIOCSETEOTMODEL: 1302 error = 0; 1303 switch (*((u_int32_t *) addr)) { 1304 case 1: 1305 softc->quirks &= ~SA_QUIRK_2FM; 1306 softc->quirks |= SA_QUIRK_1FM; 1307 break; 1308 case 2: 1309 softc->quirks &= ~SA_QUIRK_1FM; 1310 softc->quirks |= SA_QUIRK_2FM; 1311 break; 1312 default: 1313 error = EINVAL; 1314 break; 1315 } 1316 break; 1317 default: 1318 error = cam_periph_ioctl(periph, ap->a_cmd, addr, saerror); 1319 break; 1320 } 1321 1322 /* 1323 * Check to see if we cleared a frozen state 1324 */ 1325 if (error == 0 && (softc->flags & SA_FLAG_TAPE_FROZEN)) { 1326 switch(ap->a_cmd) { 1327 case MTIOCRDSPOS: 1328 case MTIOCRDHPOS: 1329 case MTIOCSLOCATE: 1330 case MTIOCHLOCATE: 1331 softc->fileno = (daddr_t) -1; 1332 softc->blkno = (daddr_t) -1; 1333 softc->flags &= ~SA_FLAG_TAPE_FROZEN; 1334 xpt_print(periph->path, 1335 "tape state now unfrozen.\n"); 1336 break; 1337 default: 1338 break; 1339 } 1340 } 1341 if (didholdperiph) 1342 cam_periph_unhold(periph, 1); 1343 else 1344 cam_periph_unlock(periph); 1345 return (error); 1346 } 1347 1348 static void 1349 sainit(void) 1350 { 1351 cam_status status; 1352 1353 /* 1354 * Create our extend array for storing the devices we attach to. 1355 */ 1356 saperiphs = cam_extend_new(); 1357 if (saperiphs == NULL) { 1358 kprintf("sa: Failed to alloc extend array!\n"); 1359 return; 1360 } 1361 1362 /* 1363 * Install a global async callback. 1364 */ 1365 status = xpt_register_async(AC_FOUND_DEVICE, saasync, NULL, NULL); 1366 1367 if (status != CAM_REQ_CMP) { 1368 kprintf("sa: Failed to attach master async callback " 1369 "due to status 0x%x!\n", status); 1370 } 1371 } 1372 1373 static void 1374 saoninvalidate(struct cam_periph *periph) 1375 { 1376 struct sa_softc *softc; 1377 struct buf *q_bp; 1378 struct bio *q_bio; 1379 1380 softc = (struct sa_softc *)periph->softc; 1381 1382 /* 1383 * De-register any async callbacks. 1384 */ 1385 xpt_register_async(0, saasync, periph, periph->path); 1386 1387 softc->flags |= SA_FLAG_INVALID; 1388 1389 /* 1390 * Return all queued I/O with ENXIO. 1391 * XXX Handle any transactions queued to the card 1392 * with XPT_ABORT_CCB. 1393 */ 1394 while ((q_bio = bioq_first(&softc->bio_queue)) != NULL){ 1395 bioq_remove(&softc->bio_queue, q_bio); 1396 q_bp = q_bio->bio_buf; 1397 q_bp->b_resid = q_bp->b_bcount; 1398 q_bp->b_error = ENXIO; 1399 q_bp->b_flags |= B_ERROR; 1400 biodone(q_bio); 1401 } 1402 softc->queue_count = 0; 1403 1404 xpt_print(periph->path, "lost device\n"); 1405 1406 } 1407 1408 static void 1409 sacleanup(struct cam_periph *periph) 1410 { 1411 struct sa_softc *softc; 1412 1413 softc = (struct sa_softc *)periph->softc; 1414 1415 devstat_remove_entry(&softc->device_stats); 1416 1417 cam_extend_release(saperiphs, periph->unit_number); 1418 xpt_print(periph->path, "removing device entry\n"); 1419 dev_ops_remove_minor(&sa_ops, /*SA_UNITMASK,*/ SA_UNIT(periph->unit_number)); 1420 kfree(softc, M_SCSISA); 1421 } 1422 1423 static void 1424 saasync(void *callback_arg, u_int32_t code, 1425 struct cam_path *path, void *arg) 1426 { 1427 struct cam_periph *periph; 1428 1429 periph = (struct cam_periph *)callback_arg; 1430 switch (code) { 1431 case AC_FOUND_DEVICE: 1432 { 1433 struct ccb_getdev *cgd; 1434 cam_status status; 1435 1436 cgd = (struct ccb_getdev *)arg; 1437 if (cgd == NULL) 1438 break; 1439 1440 if (SID_TYPE(&cgd->inq_data) != T_SEQUENTIAL) 1441 break; 1442 1443 /* 1444 * Allocate a peripheral instance for 1445 * this device and start the probe 1446 * process. 1447 */ 1448 status = cam_periph_alloc(saregister, saoninvalidate, 1449 sacleanup, sastart, 1450 "sa", CAM_PERIPH_BIO, cgd->ccb_h.path, 1451 saasync, AC_FOUND_DEVICE, cgd); 1452 1453 if (status != CAM_REQ_CMP 1454 && status != CAM_REQ_INPROG) 1455 kprintf("saasync: Unable to probe new device " 1456 "due to status 0x%x\n", status); 1457 break; 1458 } 1459 default: 1460 cam_periph_async(periph, code, path, arg); 1461 break; 1462 } 1463 } 1464 1465 static cam_status 1466 saregister(struct cam_periph *periph, void *arg) 1467 { 1468 struct sa_softc *softc; 1469 struct ccb_getdev *cgd; 1470 caddr_t match; 1471 int i; 1472 1473 cgd = (struct ccb_getdev *)arg; 1474 if (periph == NULL) { 1475 kprintf("saregister: periph was NULL!!\n"); 1476 return (CAM_REQ_CMP_ERR); 1477 } 1478 1479 if (cgd == NULL) { 1480 kprintf("saregister: no getdev CCB, can't register device\n"); 1481 return (CAM_REQ_CMP_ERR); 1482 } 1483 1484 softc = kmalloc(sizeof (*softc), M_SCSISA, M_INTWAIT | M_ZERO); 1485 softc->scsi_rev = SID_ANSI_REV(&cgd->inq_data); 1486 softc->state = SA_STATE_NORMAL; 1487 softc->fileno = (daddr_t) -1; 1488 softc->blkno = (daddr_t) -1; 1489 1490 bioq_init(&softc->bio_queue); 1491 periph->softc = softc; 1492 cam_extend_set(saperiphs, periph->unit_number, periph); 1493 1494 /* 1495 * See if this device has any quirks. 1496 */ 1497 match = cam_quirkmatch((caddr_t)&cgd->inq_data, 1498 (caddr_t)sa_quirk_table, 1499 sizeof(sa_quirk_table)/sizeof(*sa_quirk_table), 1500 sizeof(*sa_quirk_table), scsi_inquiry_match); 1501 1502 if (match != NULL) { 1503 softc->quirks = ((struct sa_quirk_entry *)match)->quirks; 1504 softc->last_media_blksize = 1505 ((struct sa_quirk_entry *)match)->prefblk; 1506 #ifdef CAMDEBUG 1507 xpt_print(periph->path, "found quirk entry %d\n", 1508 (int) (((struct sa_quirk_entry *) match) - sa_quirk_table)); 1509 #endif 1510 } else 1511 softc->quirks = SA_QUIRK_NONE; 1512 1513 /* 1514 * The SA driver supports a blocksize, but we don't know the 1515 * blocksize until we media is inserted. So, set a flag to 1516 * indicate that the blocksize is unavailable right now. 1517 */ 1518 cam_periph_unlock(periph); 1519 devstat_add_entry(&softc->device_stats, "sa", periph->unit_number, 0, 1520 DEVSTAT_BS_UNAVAILABLE, SID_TYPE(&cgd->inq_data) | 1521 DEVSTAT_TYPE_IF_SCSI, DEVSTAT_PRIORITY_TAPE); 1522 1523 make_dev(&sa_ops, SAMINOR(SA_CTLDEV, 1524 periph->unit_number, 0, SA_ATYPE_R), UID_ROOT, GID_OPERATOR, 1525 0660, "%s%d.ctl", periph->periph_name, periph->unit_number); 1526 1527 make_dev(&sa_ops, SAMINOR(SA_NOT_CTLDEV, 1528 periph->unit_number, 0, SA_ATYPE_R), UID_ROOT, GID_OPERATOR, 1529 0660, "%s%d", periph->periph_name, periph->unit_number); 1530 1531 make_dev(&sa_ops, SAMINOR(SA_NOT_CTLDEV, 1532 periph->unit_number, 0, SA_ATYPE_NR), UID_ROOT, GID_OPERATOR, 1533 0660, "n%s%d", periph->periph_name, periph->unit_number); 1534 1535 make_dev(&sa_ops, SAMINOR(SA_NOT_CTLDEV, 1536 periph->unit_number, 0, SA_ATYPE_ER), UID_ROOT, GID_OPERATOR, 1537 0660, "e%s%d", periph->periph_name, periph->unit_number); 1538 1539 for (i = 0; i < SA_NUM_MODES; i++) { 1540 1541 make_dev(&sa_ops, 1542 SAMINOR(SA_NOT_CTLDEV, periph->unit_number, i, SA_ATYPE_R), 1543 UID_ROOT, GID_OPERATOR, 0660, "%s%d.%d", 1544 periph->periph_name, periph->unit_number, i); 1545 1546 make_dev(&sa_ops, 1547 SAMINOR(SA_NOT_CTLDEV, periph->unit_number, i, SA_ATYPE_NR), 1548 UID_ROOT, GID_OPERATOR, 0660, "n%s%d.%d", 1549 periph->periph_name, periph->unit_number, i); 1550 1551 1552 make_dev(&sa_ops, 1553 SAMINOR(SA_NOT_CTLDEV, periph->unit_number, i, SA_ATYPE_ER), 1554 UID_ROOT, GID_OPERATOR, 0660, "e%s%d.%d", 1555 periph->periph_name, periph->unit_number, i); 1556 } 1557 cam_periph_lock(periph); 1558 1559 /* 1560 * Add an async callback so that we get 1561 * notified if this device goes away. 1562 */ 1563 xpt_register_async(AC_LOST_DEVICE, saasync, periph, periph->path); 1564 1565 xpt_announce_periph(periph, NULL); 1566 1567 return (CAM_REQ_CMP); 1568 } 1569 1570 static void 1571 sastart(struct cam_periph *periph, union ccb *start_ccb) 1572 { 1573 struct sa_softc *softc; 1574 1575 softc = (struct sa_softc *)periph->softc; 1576 1577 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("sastart\n")); 1578 1579 1580 switch (softc->state) { 1581 case SA_STATE_NORMAL: 1582 { 1583 /* Pull a buffer from the queue and get going on it */ 1584 struct buf *bp; 1585 struct bio *bio; 1586 1587 /* 1588 * See if there is a buf with work for us to do.. 1589 */ 1590 bio = bioq_first(&softc->bio_queue); 1591 if (periph->immediate_priority <= periph->pinfo.priority) { 1592 CAM_DEBUG_PRINT(CAM_DEBUG_SUBTRACE, 1593 ("queuing for immediate ccb\n")); 1594 Set_CCB_Type(start_ccb, SA_CCB_WAITING); 1595 SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h, 1596 periph_links.sle); 1597 periph->immediate_priority = CAM_PRIORITY_NONE; 1598 wakeup(&periph->ccb_list); 1599 } else if (bio == NULL) { 1600 xpt_release_ccb(start_ccb); 1601 } else if ((softc->flags & SA_FLAG_ERR_PENDING) != 0) { 1602 struct bio *done_bio; 1603 again: 1604 softc->queue_count--; 1605 bioq_remove(&softc->bio_queue, bio); 1606 bp = bio->bio_buf; 1607 bp->b_resid = bp->b_bcount; 1608 done_bio = bio; 1609 if ((softc->flags & SA_FLAG_EOM_PENDING) != 0) { 1610 /* 1611 * We now just clear errors in this case 1612 * and let the residual be the notifier. 1613 */ 1614 bp->b_error = 0; 1615 } else if ((softc->flags & SA_FLAG_EOF_PENDING) != 0) { 1616 /* 1617 * This can only happen if we're reading 1618 * in fixed length mode. In this case, 1619 * we dump the rest of the list the 1620 * same way. 1621 */ 1622 bp->b_error = 0; 1623 if (bioq_first(&softc->bio_queue) != NULL) { 1624 biodone(done_bio); 1625 goto again; 1626 } 1627 } else if ((softc->flags & SA_FLAG_EIO_PENDING) != 0) { 1628 bp->b_error = EIO; 1629 bp->b_flags |= B_ERROR; 1630 } 1631 bio = bioq_first(&softc->bio_queue); 1632 /* 1633 * Only if we have no other buffers queued up 1634 * do we clear the pending error flag. 1635 */ 1636 if (bio == NULL) 1637 softc->flags &= ~SA_FLAG_ERR_PENDING; 1638 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 1639 ("sastart- ERR_PENDING now 0x%x, bio is %sNULL, " 1640 "%d more buffers queued up\n", 1641 (softc->flags & SA_FLAG_ERR_PENDING), 1642 (bio != NULL)? "not " : " ", softc->queue_count)); 1643 xpt_release_ccb(start_ccb); 1644 biodone(done_bio); 1645 } else { 1646 u_int32_t length; 1647 1648 bioq_remove(&softc->bio_queue, bio); 1649 bp = bio->bio_buf; 1650 softc->queue_count--; 1651 1652 if ((softc->flags & SA_FLAG_FIXED) != 0) { 1653 if (softc->blk_shift != 0) { 1654 length = 1655 bp->b_bcount >> softc->blk_shift; 1656 } else if (softc->media_blksize != 0) { 1657 length = 1658 bp->b_bcount / softc->media_blksize; 1659 } else { 1660 bp->b_error = EIO; 1661 xpt_print(periph->path, "zero blocksize" 1662 " for FIXED length writes?\n"); 1663 biodone(bio); 1664 break; 1665 } 1666 #if 0 1667 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_INFO, 1668 ("issuing a %d fixed record %s\n", 1669 length, (bp->bio_cmd == BIO_READ)? "read" : 1670 "write")); 1671 #endif 1672 } else { 1673 length = bp->b_bcount; 1674 #if 0 1675 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_INFO, 1676 ("issuing a %d variable byte %s\n", 1677 length, (bp->bio_cmd == BIO_READ)? "read" : 1678 "write")); 1679 #endif 1680 } 1681 devstat_start_transaction(&softc->device_stats); 1682 /* 1683 * Some people have theorized that we should 1684 * suppress illegal length indication if we are 1685 * running in variable block mode so that we don't 1686 * have to request sense every time our requested 1687 * block size is larger than the written block. 1688 * The residual information from the ccb allows 1689 * us to identify this situation anyway. The only 1690 * problem with this is that we will not get 1691 * information about blocks that are larger than 1692 * our read buffer unless we set the block size 1693 * in the mode page to something other than 0. 1694 * 1695 * I believe that this is a non-issue. If user apps 1696 * don't adjust their read size to match our record 1697 * size, that's just life. Anyway, the typical usage 1698 * would be to issue, e.g., 64KB reads and occasionally 1699 * have to do deal with 512 byte or 1KB intermediate 1700 * records. 1701 */ 1702 softc->dsreg = (bp->b_cmd == BUF_CMD_READ) ? 1703 MTIO_DSREG_RD : MTIO_DSREG_WR; 1704 scsi_sa_read_write(&start_ccb->csio, 0, sadone, 1705 MSG_SIMPLE_Q_TAG, (bp->b_cmd == BUF_CMD_READ) != 0, 1706 FALSE, (softc->flags & SA_FLAG_FIXED) != 0, 1707 length, bp->b_data, bp->b_bcount, SSD_FULL_SIZE, 1708 IO_TIMEOUT); 1709 start_ccb->ccb_h.ccb_pflags &= ~SA_POSITION_UPDATED; 1710 Set_CCB_Type(start_ccb, SA_CCB_BUFFER_IO); 1711 start_ccb->ccb_h.ccb_bio = bio; 1712 bio = bioq_first(&softc->bio_queue); 1713 xpt_action(start_ccb); 1714 } 1715 1716 if (bio != NULL) { 1717 /* Have more work to do, so ensure we stay scheduled */ 1718 xpt_schedule(periph, 1); 1719 } 1720 break; 1721 } 1722 case SA_STATE_ABNORMAL: 1723 default: 1724 panic("state 0x%x in sastart", softc->state); 1725 break; 1726 } 1727 } 1728 1729 1730 static void 1731 sadone(struct cam_periph *periph, union ccb *done_ccb) 1732 { 1733 struct sa_softc *softc; 1734 struct ccb_scsiio *csio; 1735 1736 softc = (struct sa_softc *)periph->softc; 1737 csio = &done_ccb->csio; 1738 switch (CCB_Type(csio)) { 1739 case SA_CCB_BUFFER_IO: 1740 { 1741 struct buf *bp; 1742 struct bio *bio; 1743 int error; 1744 1745 softc->dsreg = MTIO_DSREG_REST; 1746 bio = (struct bio *)done_ccb->ccb_h.ccb_bio; 1747 bp = bio->bio_buf; 1748 error = 0; 1749 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 1750 if ((error = saerror(done_ccb, 0, 0)) == ERESTART) { 1751 /* 1752 * A retry was scheduled, so just return. 1753 */ 1754 return; 1755 } 1756 } 1757 1758 if (error == EIO) { 1759 struct buf *q_bp; 1760 struct bio *q_bio; 1761 1762 /* 1763 * Catastrophic error. Mark the tape as frozen 1764 * (we no longer know tape position). 1765 * 1766 * Return all queued I/O with EIO, and unfreeze 1767 * our queue so that future transactions that 1768 * attempt to fix this problem can get to the 1769 * device. 1770 * 1771 */ 1772 1773 softc->flags |= SA_FLAG_TAPE_FROZEN; 1774 while ((q_bio = bioq_first(&softc->bio_queue)) != NULL) { 1775 bioq_remove(&softc->bio_queue, q_bio); 1776 q_bp = q_bio->bio_buf; 1777 q_bp->b_resid = q_bp->b_bcount; 1778 q_bp->b_error = EIO; 1779 q_bp->b_flags |= B_ERROR; 1780 biodone(q_bio); 1781 } 1782 } 1783 if (error != 0) { 1784 bp->b_resid = bp->b_bcount; 1785 bp->b_error = error; 1786 bp->b_flags |= B_ERROR; 1787 /* 1788 * In the error case, position is updated in saerror. 1789 */ 1790 } else { 1791 bp->b_resid = csio->resid; 1792 bp->b_error = 0; 1793 if (csio->resid != 0) { 1794 bp->b_flags |= B_ERROR; 1795 } 1796 if (bp->b_cmd != BUF_CMD_READ) { 1797 softc->flags |= SA_FLAG_TAPE_WRITTEN; 1798 softc->filemarks = 0; 1799 } 1800 if (!(csio->ccb_h.ccb_pflags & SA_POSITION_UPDATED) && 1801 (softc->blkno != (daddr_t) -1)) { 1802 if ((softc->flags & SA_FLAG_FIXED) != 0) { 1803 u_int32_t l; 1804 if (softc->blk_shift != 0) { 1805 l = bp->b_bcount >> 1806 softc->blk_shift; 1807 } else { 1808 l = bp->b_bcount / 1809 softc->media_blksize; 1810 } 1811 softc->blkno += (daddr_t) l; 1812 } else { 1813 softc->blkno++; 1814 } 1815 } 1816 } 1817 /* 1818 * If we had an error (immediate or pending), 1819 * release the device queue now. 1820 */ 1821 if (error || (softc->flags & SA_FLAG_ERR_PENDING)) 1822 cam_release_devq(done_ccb->ccb_h.path, 0, 0, 0, 0); 1823 #ifdef CAMDEBUG 1824 if (error || bp->b_resid) { 1825 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 1826 ("error %d resid %d count %d\n", error, 1827 bp->b_resid, bp->b_bcount)); 1828 } 1829 #endif 1830 devstat_end_transaction_buf(&softc->device_stats, bp); 1831 biodone(bio); 1832 break; 1833 } 1834 case SA_CCB_WAITING: 1835 { 1836 /* Caller will release the CCB */ 1837 wakeup(&done_ccb->ccb_h.cbfcnp); 1838 return; 1839 } 1840 } 1841 xpt_release_ccb(done_ccb); 1842 } 1843 1844 /* 1845 * Mount the tape (make sure it's ready for I/O). 1846 */ 1847 static int 1848 samount(struct cam_periph *periph, int oflags, cdev_t dev) 1849 { 1850 struct sa_softc *softc; 1851 union ccb *ccb; 1852 int error; 1853 1854 /* 1855 * oflags can be checked for 'kind' of open (read-only check) - later 1856 * dev can be checked for a control-mode or compression open - later 1857 */ 1858 UNUSED_PARAMETER(oflags); 1859 UNUSED_PARAMETER(dev); 1860 1861 1862 softc = (struct sa_softc *)periph->softc; 1863 1864 /* 1865 * This should determine if something has happend since the last 1866 * open/mount that would invalidate the mount. We do *not* want 1867 * to retry this command- we just want the status. But we only 1868 * do this if we're mounted already- if we're not mounted, 1869 * we don't care about the unit read state and can instead use 1870 * this opportunity to attempt to reserve the tape unit. 1871 */ 1872 1873 if (softc->flags & SA_FLAG_TAPE_MOUNTED) { 1874 ccb = cam_periph_getccb(periph, 1); 1875 scsi_test_unit_ready(&ccb->csio, 0, sadone, 1876 MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT); 1877 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT, 1878 &softc->device_stats); 1879 QFRLS(ccb); 1880 if (error == ENXIO) { 1881 softc->flags &= ~SA_FLAG_TAPE_MOUNTED; 1882 scsi_test_unit_ready(&ccb->csio, 0, sadone, 1883 MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT); 1884 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT, 1885 &softc->device_stats); 1886 QFRLS(ccb); 1887 } else if (error) { 1888 /* 1889 * We don't need to freeze the tape because we 1890 * will now attempt to rewind/load it. 1891 */ 1892 softc->flags &= ~SA_FLAG_TAPE_MOUNTED; 1893 if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) { 1894 xpt_print(periph->path, 1895 "error %d on TUR in samount\n", error); 1896 } 1897 } 1898 } else { 1899 error = sareservereleaseunit(periph, TRUE); 1900 if (error) { 1901 return (error); 1902 } 1903 ccb = cam_periph_getccb(periph, 1); 1904 scsi_test_unit_ready(&ccb->csio, 0, sadone, 1905 MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT); 1906 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT, 1907 &softc->device_stats); 1908 QFRLS(ccb); 1909 } 1910 1911 if ((softc->flags & SA_FLAG_TAPE_MOUNTED) == 0) { 1912 struct scsi_read_block_limits_data *rblim = NULL; 1913 int comp_enabled = 0; /* silence gcc */ 1914 int comp_supported = 0; /* silence gcc */ 1915 u_int8_t write_protect = 0; /* silence gcc */ 1916 u_int8_t guessing = 0; 1917 1918 /* 1919 * Clear out old state. 1920 */ 1921 softc->flags &= ~(SA_FLAG_TAPE_WP|SA_FLAG_TAPE_WRITTEN| 1922 SA_FLAG_ERR_PENDING|SA_FLAG_COMP_ENABLED| 1923 SA_FLAG_COMP_SUPP|SA_FLAG_COMP_UNSUPP); 1924 softc->filemarks = 0; 1925 1926 /* 1927 * *Very* first off, make sure we're loaded to BOT. 1928 */ 1929 scsi_load_unload(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, FALSE, 1930 FALSE, FALSE, 1, SSD_FULL_SIZE, REWIND_TIMEOUT); 1931 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT, 1932 &softc->device_stats); 1933 QFRLS(ccb); 1934 1935 /* 1936 * In case this doesn't work, do a REWIND instead 1937 */ 1938 if (error) { 1939 scsi_rewind(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, 1940 FALSE, SSD_FULL_SIZE, REWIND_TIMEOUT); 1941 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT, 1942 &softc->device_stats); 1943 QFRLS(ccb); 1944 } 1945 if (error) { 1946 xpt_release_ccb(ccb); 1947 goto exit; 1948 } 1949 1950 /* 1951 * Do a dummy test read to force access to the 1952 * media so that the drive will really know what's 1953 * there. We actually don't really care what the 1954 * blocksize on tape is and don't expect to really 1955 * read a full record. 1956 */ 1957 rblim = kmalloc(8192, M_SCSISA, M_INTWAIT); 1958 1959 if ((softc->quirks & SA_QUIRK_NODREAD) == 0) { 1960 scsi_sa_read_write(&ccb->csio, 0, sadone, 1961 MSG_SIMPLE_Q_TAG, 1, FALSE, 0, 8192, 1962 (void *) rblim, 8192, SSD_FULL_SIZE, 1963 IO_TIMEOUT); 1964 cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT, 1965 &softc->device_stats); 1966 QFRLS(ccb); 1967 scsi_rewind(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG, 1968 FALSE, SSD_FULL_SIZE, REWIND_TIMEOUT); 1969 error = cam_periph_runccb(ccb, saerror, CAM_RETRY_SELTO, 1970 SF_NO_PRINT | SF_RETRY_UA, 1971 &softc->device_stats); 1972 QFRLS(ccb); 1973 if (error) { 1974 xpt_print(periph->path, 1975 "unable to rewind after test read\n"); 1976 xpt_release_ccb(ccb); 1977 goto exit; 1978 } 1979 } 1980 1981 /* 1982 * Next off, determine block limits. 1983 */ 1984 scsi_read_block_limits(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, 1985 rblim, SSD_FULL_SIZE, SCSIOP_TIMEOUT); 1986 1987 error = cam_periph_runccb(ccb, saerror, CAM_RETRY_SELTO, 1988 SF_NO_PRINT | SF_RETRY_UA, &softc->device_stats); 1989 1990 QFRLS(ccb); 1991 xpt_release_ccb(ccb); 1992 1993 if (error != 0) { 1994 /* 1995 * If it's less than SCSI-2, READ BLOCK LIMITS is not 1996 * a MANDATORY command. Anyway- it doesn't matter- 1997 * we can proceed anyway. 1998 */ 1999 softc->blk_gran = 0; 2000 softc->max_blk = ~0; 2001 softc->min_blk = 0; 2002 } else { 2003 if (softc->scsi_rev >= SCSI_REV_SPC) { 2004 softc->blk_gran = RBL_GRAN(rblim); 2005 } else { 2006 softc->blk_gran = 0; 2007 } 2008 /* 2009 * We take max_blk == min_blk to mean a default to 2010 * fixed mode- but note that whatever we get out of 2011 * sagetparams below will actually determine whether 2012 * we are actually *in* fixed mode. 2013 */ 2014 softc->max_blk = scsi_3btoul(rblim->maximum); 2015 softc->min_blk = scsi_2btoul(rblim->minimum); 2016 2017 2018 } 2019 /* 2020 * Next, perform a mode sense to determine 2021 * current density, blocksize, compression etc. 2022 */ 2023 error = sagetparams(periph, SA_PARAM_ALL, 2024 &softc->media_blksize, 2025 &softc->media_density, 2026 &softc->media_numblks, 2027 &softc->buffer_mode, &write_protect, 2028 &softc->speed, &comp_supported, 2029 &comp_enabled, &softc->comp_algorithm, 2030 NULL); 2031 2032 if (error != 0) { 2033 /* 2034 * We could work a little harder here. We could 2035 * adjust our attempts to get information. It 2036 * might be an ancient tape drive. If someone 2037 * nudges us, we'll do that. 2038 */ 2039 goto exit; 2040 } 2041 2042 /* 2043 * If no quirk has determined that this is a device that is 2044 * preferred to be in fixed or variable mode, now is the time 2045 * to find out. 2046 */ 2047 if ((softc->quirks & (SA_QUIRK_FIXED|SA_QUIRK_VARIABLE)) == 0) { 2048 guessing = 1; 2049 /* 2050 * This could be expensive to find out. Luckily we 2051 * only need to do this once. If we start out in 2052 * 'default' mode, try and set ourselves to one 2053 * of the densities that would determine a wad 2054 * of other stuff. Go from highest to lowest. 2055 */ 2056 if (softc->media_density == SCSI_DEFAULT_DENSITY) { 2057 int i; 2058 static u_int8_t ctry[] = { 2059 SCSI_DENSITY_HALFINCH_PE, 2060 SCSI_DENSITY_HALFINCH_6250C, 2061 SCSI_DENSITY_HALFINCH_6250, 2062 SCSI_DENSITY_HALFINCH_1600, 2063 SCSI_DENSITY_HALFINCH_800, 2064 SCSI_DENSITY_QIC_4GB, 2065 SCSI_DENSITY_QIC_2GB, 2066 SCSI_DENSITY_QIC_525_320, 2067 SCSI_DENSITY_QIC_150, 2068 SCSI_DENSITY_QIC_120, 2069 SCSI_DENSITY_QIC_24, 2070 SCSI_DENSITY_QIC_11_9TRK, 2071 SCSI_DENSITY_QIC_11_4TRK, 2072 SCSI_DENSITY_QIC_1320, 2073 SCSI_DENSITY_QIC_3080, 2074 0 2075 }; 2076 for (i = 0; ctry[i]; i++) { 2077 error = sasetparams(periph, 2078 SA_PARAM_DENSITY, 0, ctry[i], 2079 0, SF_NO_PRINT); 2080 if (error == 0) { 2081 softc->media_density = ctry[i]; 2082 break; 2083 } 2084 } 2085 } 2086 switch (softc->media_density) { 2087 case SCSI_DENSITY_QIC_11_4TRK: 2088 case SCSI_DENSITY_QIC_11_9TRK: 2089 case SCSI_DENSITY_QIC_24: 2090 case SCSI_DENSITY_QIC_120: 2091 case SCSI_DENSITY_QIC_150: 2092 case SCSI_DENSITY_QIC_525_320: 2093 case SCSI_DENSITY_QIC_1320: 2094 case SCSI_DENSITY_QIC_3080: 2095 softc->quirks &= ~SA_QUIRK_2FM; 2096 softc->quirks |= SA_QUIRK_FIXED|SA_QUIRK_1FM; 2097 softc->last_media_blksize = 512; 2098 break; 2099 case SCSI_DENSITY_QIC_4GB: 2100 case SCSI_DENSITY_QIC_2GB: 2101 softc->quirks &= ~SA_QUIRK_2FM; 2102 softc->quirks |= SA_QUIRK_FIXED|SA_QUIRK_1FM; 2103 softc->last_media_blksize = 1024; 2104 break; 2105 default: 2106 softc->last_media_blksize = 2107 softc->media_blksize; 2108 softc->quirks |= SA_QUIRK_VARIABLE; 2109 break; 2110 } 2111 } 2112 2113 /* 2114 * If no quirk has determined that this is a device that needs 2115 * to have 2 Filemarks at EOD, now is the time to find out. 2116 */ 2117 2118 if ((softc->quirks & SA_QUIRK_2FM) == 0) { 2119 switch (softc->media_density) { 2120 case SCSI_DENSITY_HALFINCH_800: 2121 case SCSI_DENSITY_HALFINCH_1600: 2122 case SCSI_DENSITY_HALFINCH_6250: 2123 case SCSI_DENSITY_HALFINCH_6250C: 2124 case SCSI_DENSITY_HALFINCH_PE: 2125 softc->quirks &= ~SA_QUIRK_1FM; 2126 softc->quirks |= SA_QUIRK_2FM; 2127 break; 2128 default: 2129 break; 2130 } 2131 } 2132 2133 /* 2134 * Now validate that some info we got makes sense. 2135 */ 2136 if ((softc->max_blk < softc->media_blksize) || 2137 (softc->min_blk > softc->media_blksize && 2138 softc->media_blksize)) { 2139 xpt_print(periph->path, 2140 "BLOCK LIMITS (%d..%d) could not match current " 2141 "block settings (%d)- adjusting\n", softc->min_blk, 2142 softc->max_blk, softc->media_blksize); 2143 softc->max_blk = softc->min_blk = 2144 softc->media_blksize; 2145 } 2146 2147 /* 2148 * Now put ourselves into the right frame of mind based 2149 * upon quirks... 2150 */ 2151 tryagain: 2152 /* 2153 * If we want to be in FIXED mode and our current blocksize 2154 * is not equal to our last blocksize (if nonzero), try and 2155 * set ourselves to this last blocksize (as the 'preferred' 2156 * block size). The initial quirkmatch at registry sets the 2157 * initial 'last' blocksize. If, for whatever reason, this 2158 * 'last' blocksize is zero, set the blocksize to 512, 2159 * or min_blk if that's larger. 2160 */ 2161 if ((softc->quirks & SA_QUIRK_FIXED) && 2162 (softc->quirks & SA_QUIRK_NO_MODESEL) == 0 && 2163 (softc->media_blksize != softc->last_media_blksize)) { 2164 softc->media_blksize = softc->last_media_blksize; 2165 if (softc->media_blksize == 0) { 2166 softc->media_blksize = 512; 2167 if (softc->media_blksize < softc->min_blk) { 2168 softc->media_blksize = softc->min_blk; 2169 } 2170 } 2171 error = sasetparams(periph, SA_PARAM_BLOCKSIZE, 2172 softc->media_blksize, 0, 0, SF_NO_PRINT); 2173 if (error) { 2174 xpt_print(periph->path, 2175 "unable to set fixed blocksize to %d\n", 2176 softc->media_blksize); 2177 goto exit; 2178 } 2179 } 2180 2181 if ((softc->quirks & SA_QUIRK_VARIABLE) && 2182 (softc->media_blksize != 0)) { 2183 softc->last_media_blksize = softc->media_blksize; 2184 softc->media_blksize = 0; 2185 error = sasetparams(periph, SA_PARAM_BLOCKSIZE, 2186 0, 0, 0, SF_NO_PRINT); 2187 if (error) { 2188 /* 2189 * If this fails and we were guessing, just 2190 * assume that we got it wrong and go try 2191 * fixed block mode. Don't even check against 2192 * density code at this point. 2193 */ 2194 if (guessing) { 2195 softc->quirks &= ~SA_QUIRK_VARIABLE; 2196 softc->quirks |= SA_QUIRK_FIXED; 2197 if (softc->last_media_blksize == 0) 2198 softc->last_media_blksize = 512; 2199 goto tryagain; 2200 } 2201 xpt_print(periph->path, 2202 "unable to set variable blocksize\n"); 2203 goto exit; 2204 } 2205 } 2206 2207 /* 2208 * Now that we have the current block size, 2209 * set up some parameters for sastart's usage. 2210 */ 2211 if (softc->media_blksize) { 2212 softc->flags |= SA_FLAG_FIXED; 2213 if (powerof2(softc->media_blksize)) { 2214 softc->blk_shift = 2215 ffs(softc->media_blksize) - 1; 2216 softc->blk_mask = softc->media_blksize - 1; 2217 } else { 2218 softc->blk_mask = ~0; 2219 softc->blk_shift = 0; 2220 } 2221 } else { 2222 /* 2223 * The SCSI-3 spec allows 0 to mean "unspecified". 2224 * The SCSI-1 spec allows 0 to mean 'infinite'. 2225 * 2226 * Either works here. 2227 */ 2228 if (softc->max_blk == 0) { 2229 softc->max_blk = ~0; 2230 } 2231 softc->blk_shift = 0; 2232 if (softc->blk_gran != 0) { 2233 softc->blk_mask = softc->blk_gran - 1; 2234 } else { 2235 softc->blk_mask = 0; 2236 } 2237 } 2238 2239 if (write_protect) 2240 softc->flags |= SA_FLAG_TAPE_WP; 2241 2242 if (comp_supported) { 2243 if (softc->saved_comp_algorithm == 0) 2244 softc->saved_comp_algorithm = 2245 softc->comp_algorithm; 2246 softc->flags |= SA_FLAG_COMP_SUPP; 2247 if (comp_enabled) 2248 softc->flags |= SA_FLAG_COMP_ENABLED; 2249 } else 2250 softc->flags |= SA_FLAG_COMP_UNSUPP; 2251 2252 if ((softc->buffer_mode == SMH_SA_BUF_MODE_NOBUF) && 2253 (softc->quirks & SA_QUIRK_NO_MODESEL) == 0) { 2254 error = sasetparams(periph, SA_PARAM_BUFF_MODE, 0, 2255 0, 0, SF_NO_PRINT); 2256 if (error == 0) { 2257 softc->buffer_mode = SMH_SA_BUF_MODE_SIBUF; 2258 } else { 2259 xpt_print(periph->path, 2260 "unable to set buffered mode\n"); 2261 } 2262 error = 0; /* not an error */ 2263 } 2264 2265 2266 if (error == 0) { 2267 softc->flags |= SA_FLAG_TAPE_MOUNTED; 2268 } 2269 exit: 2270 if (rblim != NULL) 2271 kfree(rblim, M_SCSISA); 2272 2273 if (error != 0) { 2274 softc->dsreg = MTIO_DSREG_NIL; 2275 } else { 2276 softc->fileno = softc->blkno = 0; 2277 softc->dsreg = MTIO_DSREG_REST; 2278 } 2279 #ifdef SA_1FM_AT_EOD 2280 if ((softc->quirks & SA_QUIRK_2FM) == 0) 2281 softc->quirks |= SA_QUIRK_1FM; 2282 #else 2283 if ((softc->quirks & SA_QUIRK_1FM) == 0) 2284 softc->quirks |= SA_QUIRK_2FM; 2285 #endif 2286 } else 2287 xpt_release_ccb(ccb); 2288 2289 /* 2290 * If we return an error, we're not mounted any more, 2291 * so release any device reservation. 2292 */ 2293 if (error != 0) { 2294 sareservereleaseunit(periph, FALSE); 2295 } else { 2296 /* 2297 * Clear I/O residual. 2298 */ 2299 softc->last_io_resid = 0; 2300 softc->last_ctl_resid = 0; 2301 } 2302 return (error); 2303 } 2304 2305 /* 2306 * How many filemarks do we need to write if we were to terminate the 2307 * tape session right now? Note that this can be a negative number 2308 */ 2309 2310 static int 2311 samarkswanted(struct cam_periph *periph) 2312 { 2313 int markswanted; 2314 struct sa_softc *softc; 2315 2316 softc = (struct sa_softc *)periph->softc; 2317 markswanted = 0; 2318 if ((softc->flags & SA_FLAG_TAPE_WRITTEN) != 0) { 2319 markswanted++; 2320 if (softc->quirks & SA_QUIRK_2FM) 2321 markswanted++; 2322 } 2323 markswanted -= softc->filemarks; 2324 return (markswanted); 2325 } 2326 2327 static int 2328 sacheckeod(struct cam_periph *periph) 2329 { 2330 int error; 2331 int markswanted; 2332 2333 markswanted = samarkswanted(periph); 2334 2335 if (markswanted > 0) { 2336 error = sawritefilemarks(periph, markswanted, FALSE); 2337 } else { 2338 error = 0; 2339 } 2340 return (error); 2341 } 2342 2343 static int 2344 saerror(union ccb *ccb, u_int32_t cflgs, u_int32_t sflgs) 2345 { 2346 static const char *toobig = 2347 "%d-byte tape record bigger than supplied buffer\n"; 2348 struct cam_periph *periph; 2349 struct sa_softc *softc; 2350 struct ccb_scsiio *csio; 2351 struct scsi_sense_data *sense; 2352 u_int32_t resid = 0; 2353 int32_t info = 0; 2354 cam_status status; 2355 int error_code, sense_key, asc, ascq, error, aqvalid; 2356 2357 periph = xpt_path_periph(ccb->ccb_h.path); 2358 softc = (struct sa_softc *)periph->softc; 2359 csio = &ccb->csio; 2360 sense = &csio->sense_data; 2361 scsi_extract_sense(sense, &error_code, &sense_key, &asc, &ascq); 2362 aqvalid = sense->extra_len >= 6; 2363 error = 0; 2364 2365 status = csio->ccb_h.status & CAM_STATUS_MASK; 2366 2367 /* 2368 * Calculate/latch up, any residuals... We do this in a funny 2-step 2369 * so we can print stuff here if we have CAM_DEBUG enabled for this 2370 * unit. 2371 */ 2372 if (status == CAM_SCSI_STATUS_ERROR) { 2373 if ((sense->error_code & SSD_ERRCODE_VALID) != 0) { 2374 info = (int32_t) scsi_4btoul(sense->info); 2375 resid = info; 2376 if ((softc->flags & SA_FLAG_FIXED) != 0) 2377 resid *= softc->media_blksize; 2378 } else { 2379 resid = csio->dxfer_len; 2380 info = resid; 2381 if ((softc->flags & SA_FLAG_FIXED) != 0) { 2382 if (softc->media_blksize) 2383 info /= softc->media_blksize; 2384 } 2385 } 2386 if (CCB_Type(csio) == SA_CCB_BUFFER_IO) { 2387 bcopy((caddr_t) sense, (caddr_t) &softc->last_io_sense, 2388 sizeof (struct scsi_sense_data)); 2389 bcopy(csio->cdb_io.cdb_bytes, softc->last_io_cdb, 2390 (int) csio->cdb_len); 2391 softc->last_io_resid = resid; 2392 softc->last_resid_was_io = 1; 2393 } else { 2394 bcopy((caddr_t) sense, (caddr_t) &softc->last_ctl_sense, 2395 sizeof (struct scsi_sense_data)); 2396 bcopy(csio->cdb_io.cdb_bytes, softc->last_ctl_cdb, 2397 (int) csio->cdb_len); 2398 softc->last_ctl_resid = resid; 2399 softc->last_resid_was_io = 0; 2400 } 2401 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, ("CDB[0]=0x%x Key 0x%x " 2402 "ASC/ASCQ 0x%x/0x%x CAM STATUS 0x%x flags 0x%x resid %d " 2403 "dxfer_len %d\n", csio->cdb_io.cdb_bytes[0] & 0xff, 2404 sense_key, asc, ascq, status, 2405 sense->flags & ~SSD_KEY_RESERVED, resid, csio->dxfer_len)); 2406 } else { 2407 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 2408 ("Cam Status 0x%x\n", status)); 2409 } 2410 2411 switch (status) { 2412 case CAM_REQ_CMP: 2413 return (0); 2414 case CAM_SCSI_STATUS_ERROR: 2415 /* 2416 * If a read/write command, we handle it here. 2417 */ 2418 if (CCB_Type(csio) != SA_CCB_WAITING) { 2419 break; 2420 } 2421 /* 2422 * If this was just EOM/EOP, Filemark, Setmark or ILI detected 2423 * on a non read/write command, we assume it's not an error 2424 * and propagate the residule and return. 2425 */ 2426 if ((aqvalid && asc == 0 && ascq > 0 && ascq <= 5) || 2427 (aqvalid == 0 && sense_key == SSD_KEY_NO_SENSE)) { 2428 csio->resid = resid; 2429 QFRLS(ccb); 2430 return (0); 2431 } 2432 /* 2433 * Otherwise, we let the common code handle this. 2434 */ 2435 return (cam_periph_error(ccb, cflgs, sflgs, &softc->saved_ccb)); 2436 2437 /* 2438 * XXX: To Be Fixed 2439 * We cannot depend upon CAM honoring retry counts for these. 2440 */ 2441 case CAM_SCSI_BUS_RESET: 2442 case CAM_BDR_SENT: 2443 if (ccb->ccb_h.retry_count <= 0) { 2444 return (EIO); 2445 } 2446 /* FALLTHROUGH */ 2447 default: 2448 return (cam_periph_error(ccb, cflgs, sflgs, &softc->saved_ccb)); 2449 } 2450 2451 /* 2452 * Handle filemark, end of tape, mismatched record sizes.... 2453 * From this point out, we're only handling read/write cases. 2454 * Handle writes && reads differently. 2455 */ 2456 2457 if (csio->cdb_io.cdb_bytes[0] == SA_WRITE) { 2458 if (sense_key == SSD_KEY_VOLUME_OVERFLOW) { 2459 csio->resid = resid; 2460 error = ENOSPC; 2461 } else if (sense->flags & SSD_EOM) { 2462 softc->flags |= SA_FLAG_EOM_PENDING; 2463 /* 2464 * Grotesque as it seems, the few times 2465 * I've actually seen a non-zero resid, 2466 * the tape drive actually lied and had 2467 * written all the data!. 2468 */ 2469 csio->resid = 0; 2470 } 2471 } else { 2472 csio->resid = resid; 2473 if (sense_key == SSD_KEY_BLANK_CHECK) { 2474 if (softc->quirks & SA_QUIRK_1FM) { 2475 error = 0; 2476 softc->flags |= SA_FLAG_EOM_PENDING; 2477 } else { 2478 error = EIO; 2479 } 2480 } else if (sense->flags & SSD_FILEMARK) { 2481 if (softc->flags & SA_FLAG_FIXED) { 2482 error = -1; 2483 softc->flags |= SA_FLAG_EOF_PENDING; 2484 } 2485 /* 2486 * Unconditionally, if we detected a filemark on a read, 2487 * mark that we've run moved a file ahead. 2488 */ 2489 if (softc->fileno != (daddr_t) -1) { 2490 softc->fileno++; 2491 softc->blkno = 0; 2492 csio->ccb_h.ccb_pflags |= SA_POSITION_UPDATED; 2493 } 2494 } 2495 } 2496 2497 /* 2498 * Incorrect Length usually applies to read, but can apply to writes. 2499 */ 2500 if (error == 0 && (sense->flags & SSD_ILI)) { 2501 if (info < 0) { 2502 xpt_print(csio->ccb_h.path, toobig, 2503 csio->dxfer_len - info); 2504 csio->resid = csio->dxfer_len; 2505 error = EIO; 2506 } else { 2507 csio->resid = resid; 2508 if (softc->flags & SA_FLAG_FIXED) { 2509 softc->flags |= SA_FLAG_EIO_PENDING; 2510 } 2511 /* 2512 * Bump the block number if we hadn't seen a filemark. 2513 * Do this independent of errors (we've moved anyway). 2514 */ 2515 if ((sense->flags & SSD_FILEMARK) == 0) { 2516 if (softc->blkno != (daddr_t) -1) { 2517 softc->blkno++; 2518 csio->ccb_h.ccb_pflags |= 2519 SA_POSITION_UPDATED; 2520 } 2521 } 2522 } 2523 } 2524 2525 if (error <= 0) { 2526 /* 2527 * Unfreeze the queue if frozen as we're not returning anything 2528 * to our waiters that would indicate an I/O error has occurred 2529 * (yet). 2530 */ 2531 QFRLS(ccb); 2532 error = 0; 2533 } 2534 return (error); 2535 } 2536 2537 static int 2538 sagetparams(struct cam_periph *periph, sa_params params_to_get, 2539 u_int32_t *blocksize, u_int8_t *density, u_int32_t *numblocks, 2540 int *buff_mode, u_int8_t *write_protect, u_int8_t *speed, 2541 int *comp_supported, int *comp_enabled, u_int32_t *comp_algorithm, 2542 sa_comp_t *tcs) 2543 { 2544 union ccb *ccb; 2545 void *mode_buffer; 2546 struct scsi_mode_header_6 *mode_hdr; 2547 struct scsi_mode_blk_desc *mode_blk; 2548 int mode_buffer_len; 2549 struct sa_softc *softc; 2550 u_int8_t cpage; 2551 int error; 2552 cam_status status; 2553 2554 softc = (struct sa_softc *)periph->softc; 2555 ccb = cam_periph_getccb(periph, 1); 2556 if (softc->quirks & SA_QUIRK_NO_CPAGE) 2557 cpage = SA_DEVICE_CONFIGURATION_PAGE; 2558 else 2559 cpage = SA_DATA_COMPRESSION_PAGE; 2560 2561 retry: 2562 mode_buffer_len = sizeof(*mode_hdr) + sizeof(*mode_blk); 2563 2564 if (params_to_get & SA_PARAM_COMPRESSION) { 2565 if (softc->quirks & SA_QUIRK_NOCOMP) { 2566 *comp_supported = FALSE; 2567 params_to_get &= ~SA_PARAM_COMPRESSION; 2568 } else 2569 mode_buffer_len += sizeof (sa_comp_t); 2570 } 2571 2572 mode_buffer = kmalloc(mode_buffer_len, M_SCSISA, M_INTWAIT | M_ZERO); 2573 mode_hdr = (struct scsi_mode_header_6 *)mode_buffer; 2574 mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1]; 2575 2576 /* it is safe to retry this */ 2577 scsi_mode_sense(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, FALSE, 2578 SMS_PAGE_CTRL_CURRENT, (params_to_get & SA_PARAM_COMPRESSION) ? 2579 cpage : SMS_VENDOR_SPECIFIC_PAGE, mode_buffer, mode_buffer_len, 2580 SSD_FULL_SIZE, SCSIOP_TIMEOUT); 2581 2582 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT, 2583 &softc->device_stats); 2584 QFRLS(ccb); 2585 2586 status = ccb->ccb_h.status & CAM_STATUS_MASK; 2587 2588 if (error == EINVAL && (params_to_get & SA_PARAM_COMPRESSION) != 0) { 2589 /* 2590 * Hmm. Let's see if we can try another page... 2591 * If we've already done that, give up on compression 2592 * for this device and remember this for the future 2593 * and attempt the request without asking for compression 2594 * info. 2595 */ 2596 if (cpage == SA_DATA_COMPRESSION_PAGE) { 2597 cpage = SA_DEVICE_CONFIGURATION_PAGE; 2598 goto retry; 2599 } 2600 softc->quirks |= SA_QUIRK_NOCOMP; 2601 kfree(mode_buffer, M_SCSISA); 2602 goto retry; 2603 } else if (status == CAM_SCSI_STATUS_ERROR) { 2604 /* Tell the user about the fatal error. */ 2605 scsi_sense_print(&ccb->csio); 2606 goto sagetparamsexit; 2607 } 2608 2609 /* 2610 * If the user only wants the compression information, and 2611 * the device doesn't send back the block descriptor, it's 2612 * no big deal. If the user wants more than just 2613 * compression, though, and the device doesn't pass back the 2614 * block descriptor, we need to send another mode sense to 2615 * get the block descriptor. 2616 */ 2617 if ((mode_hdr->blk_desc_len == 0) && 2618 (params_to_get & SA_PARAM_COMPRESSION) && 2619 (params_to_get & ~(SA_PARAM_COMPRESSION))) { 2620 2621 /* 2622 * Decrease the mode buffer length by the size of 2623 * the compression page, to make sure the data 2624 * there doesn't get overwritten. 2625 */ 2626 mode_buffer_len -= sizeof (sa_comp_t); 2627 2628 /* 2629 * Now move the compression page that we presumably 2630 * got back down the memory chunk a little bit so 2631 * it doesn't get spammed. 2632 */ 2633 bcopy(&mode_hdr[0], &mode_hdr[1], sizeof (sa_comp_t)); 2634 bzero(&mode_hdr[0], sizeof (mode_hdr[0])); 2635 2636 /* 2637 * Now, we issue another mode sense and just ask 2638 * for the block descriptor, etc. 2639 */ 2640 2641 scsi_mode_sense(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, FALSE, 2642 SMS_PAGE_CTRL_CURRENT, SMS_VENDOR_SPECIFIC_PAGE, 2643 mode_buffer, mode_buffer_len, SSD_FULL_SIZE, 2644 SCSIOP_TIMEOUT); 2645 2646 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT, 2647 &softc->device_stats); 2648 QFRLS(ccb); 2649 2650 if (error != 0) 2651 goto sagetparamsexit; 2652 } 2653 2654 if (params_to_get & SA_PARAM_BLOCKSIZE) 2655 *blocksize = scsi_3btoul(mode_blk->blklen); 2656 2657 if (params_to_get & SA_PARAM_NUMBLOCKS) 2658 *numblocks = scsi_3btoul(mode_blk->nblocks); 2659 2660 if (params_to_get & SA_PARAM_BUFF_MODE) 2661 *buff_mode = mode_hdr->dev_spec & SMH_SA_BUF_MODE_MASK; 2662 2663 if (params_to_get & SA_PARAM_DENSITY) 2664 *density = mode_blk->density; 2665 2666 if (params_to_get & SA_PARAM_WP) 2667 *write_protect = (mode_hdr->dev_spec & SMH_SA_WP)? TRUE : FALSE; 2668 2669 if (params_to_get & SA_PARAM_SPEED) 2670 *speed = mode_hdr->dev_spec & SMH_SA_SPEED_MASK; 2671 2672 if (params_to_get & SA_PARAM_COMPRESSION) { 2673 sa_comp_t *ntcs = (sa_comp_t *) &mode_blk[1]; 2674 if (cpage == SA_DATA_COMPRESSION_PAGE) { 2675 struct scsi_data_compression_page *cp = &ntcs->dcomp; 2676 *comp_supported = 2677 (cp->dce_and_dcc & SA_DCP_DCC)? TRUE : FALSE; 2678 *comp_enabled = 2679 (cp->dce_and_dcc & SA_DCP_DCE)? TRUE : FALSE; 2680 *comp_algorithm = scsi_4btoul(cp->comp_algorithm); 2681 } else { 2682 struct scsi_dev_conf_page *cp = &ntcs->dconf; 2683 /* 2684 * We don't really know whether this device supports 2685 * Data Compression if the the algorithm field is 2686 * zero. Just say we do. 2687 */ 2688 *comp_supported = TRUE; 2689 *comp_enabled = 2690 (cp->sel_comp_alg != SA_COMP_NONE)? TRUE : FALSE; 2691 *comp_algorithm = cp->sel_comp_alg; 2692 } 2693 if (tcs != NULL) 2694 bcopy(ntcs, tcs, sizeof (sa_comp_t)); 2695 } 2696 2697 if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) { 2698 int idx; 2699 char *xyz = mode_buffer; 2700 xpt_print_path(periph->path); 2701 kprintf("Mode Sense Data="); 2702 for (idx = 0; idx < mode_buffer_len; idx++) 2703 kprintf(" 0x%02x", xyz[idx] & 0xff); 2704 kprintf("\n"); 2705 } 2706 2707 sagetparamsexit: 2708 2709 xpt_release_ccb(ccb); 2710 kfree(mode_buffer, M_SCSISA); 2711 return (error); 2712 } 2713 2714 /* 2715 * The purpose of this function is to set one of four different parameters 2716 * for a tape drive: 2717 * - blocksize 2718 * - density 2719 * - compression / compression algorithm 2720 * - buffering mode 2721 * 2722 * The assumption is that this will be called from saioctl(), and therefore 2723 * from a process context. Thus the waiting malloc calls below. If that 2724 * assumption ever changes, the malloc calls should be changed to be 2725 * NOWAIT mallocs. 2726 * 2727 * Any or all of the four parameters may be set when this function is 2728 * called. It should handle setting more than one parameter at once. 2729 */ 2730 static int 2731 sasetparams(struct cam_periph *periph, sa_params params_to_set, 2732 u_int32_t blocksize, u_int8_t density, u_int32_t calg, 2733 u_int32_t sense_flags) 2734 { 2735 struct sa_softc *softc; 2736 u_int32_t current_blocksize = 0;/* silence gcc */ 2737 u_int32_t current_calg; 2738 u_int8_t current_density = 0; /* silence gcc */ 2739 u_int8_t current_speed = 0; /* silence gcc */ 2740 int comp_enabled, comp_supported; 2741 void *mode_buffer; 2742 int mode_buffer_len; 2743 struct scsi_mode_header_6 *mode_hdr; 2744 struct scsi_mode_blk_desc *mode_blk; 2745 sa_comp_t *ccomp, *cpage; 2746 int buff_mode; 2747 union ccb *ccb = NULL; 2748 int error; 2749 2750 softc = (struct sa_softc *)periph->softc; 2751 2752 ccomp = kmalloc(sizeof (sa_comp_t), M_SCSISA, M_INTWAIT); 2753 2754 /* 2755 * Since it doesn't make sense to set the number of blocks, or 2756 * write protection, we won't try to get the current value. We 2757 * always want to get the blocksize, so we can set it back to the 2758 * proper value. 2759 */ 2760 error = sagetparams(periph, 2761 params_to_set | SA_PARAM_BLOCKSIZE | SA_PARAM_SPEED, 2762 ¤t_blocksize, ¤t_density, NULL, &buff_mode, NULL, 2763 ¤t_speed, &comp_supported, &comp_enabled, 2764 ¤t_calg, ccomp); 2765 2766 if (error != 0) { 2767 kfree(ccomp, M_SCSISA); 2768 return (error); 2769 } 2770 2771 mode_buffer_len = sizeof(*mode_hdr) + sizeof(*mode_blk); 2772 if (params_to_set & SA_PARAM_COMPRESSION) 2773 mode_buffer_len += sizeof (sa_comp_t); 2774 2775 mode_buffer = kmalloc(mode_buffer_len, M_SCSISA, M_INTWAIT | M_ZERO); 2776 2777 mode_hdr = (struct scsi_mode_header_6 *)mode_buffer; 2778 mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1]; 2779 2780 ccb = cam_periph_getccb(periph, 1); 2781 2782 retry: 2783 2784 if (params_to_set & SA_PARAM_COMPRESSION) { 2785 if (mode_blk) { 2786 cpage = (sa_comp_t *)&mode_blk[1]; 2787 } else { 2788 cpage = (sa_comp_t *)&mode_hdr[1]; 2789 } 2790 bcopy(ccomp, cpage, sizeof (sa_comp_t)); 2791 cpage->hdr.pagecode &= ~0x80; 2792 } else 2793 cpage = NULL; 2794 2795 /* 2796 * If the caller wants us to set the blocksize, use the one they 2797 * pass in. Otherwise, use the blocksize we got back from the 2798 * mode select above. 2799 */ 2800 if (mode_blk) { 2801 if (params_to_set & SA_PARAM_BLOCKSIZE) 2802 scsi_ulto3b(blocksize, mode_blk->blklen); 2803 else 2804 scsi_ulto3b(current_blocksize, mode_blk->blklen); 2805 2806 /* 2807 * Set density if requested, else preserve old density. 2808 * SCSI_SAME_DENSITY only applies to SCSI-2 or better 2809 * devices, else density we've latched up in our softc. 2810 */ 2811 if (params_to_set & SA_PARAM_DENSITY) { 2812 mode_blk->density = density; 2813 } else if (softc->scsi_rev > SCSI_REV_CCS) { 2814 mode_blk->density = SCSI_SAME_DENSITY; 2815 } else { 2816 mode_blk->density = softc->media_density; 2817 } 2818 } 2819 2820 /* 2821 * For mode selects, these two fields must be zero. 2822 */ 2823 mode_hdr->data_length = 0; 2824 mode_hdr->medium_type = 0; 2825 2826 /* set the speed to the current value */ 2827 mode_hdr->dev_spec = current_speed; 2828 2829 /* if set, set single-initiator buffering mode */ 2830 if (softc->buffer_mode == SMH_SA_BUF_MODE_SIBUF) { 2831 mode_hdr->dev_spec |= SMH_SA_BUF_MODE_SIBUF; 2832 } 2833 2834 if (mode_blk) 2835 mode_hdr->blk_desc_len = sizeof(struct scsi_mode_blk_desc); 2836 else 2837 mode_hdr->blk_desc_len = 0; 2838 2839 /* 2840 * First, if the user wants us to set the compression algorithm or 2841 * just turn compression on, check to make sure that this drive 2842 * supports compression. 2843 */ 2844 if (params_to_set & SA_PARAM_COMPRESSION) { 2845 /* 2846 * If the compression algorithm is 0, disable compression. 2847 * If the compression algorithm is non-zero, enable 2848 * compression and set the compression type to the 2849 * specified compression algorithm, unless the algorithm is 2850 * MT_COMP_ENABLE. In that case, we look at the 2851 * compression algorithm that is currently set and if it is 2852 * non-zero, we leave it as-is. If it is zero, and we have 2853 * saved a compression algorithm from a time when 2854 * compression was enabled before, set the compression to 2855 * the saved value. 2856 */ 2857 switch (ccomp->hdr.pagecode & ~0x80) { 2858 case SA_DEVICE_CONFIGURATION_PAGE: 2859 { 2860 struct scsi_dev_conf_page *dcp = &cpage->dconf; 2861 if (calg == 0) { 2862 dcp->sel_comp_alg = SA_COMP_NONE; 2863 break; 2864 } 2865 if (calg != MT_COMP_ENABLE) { 2866 dcp->sel_comp_alg = calg; 2867 } else if (dcp->sel_comp_alg == SA_COMP_NONE && 2868 softc->saved_comp_algorithm != 0) { 2869 dcp->sel_comp_alg = softc->saved_comp_algorithm; 2870 } 2871 break; 2872 } 2873 case SA_DATA_COMPRESSION_PAGE: 2874 if (ccomp->dcomp.dce_and_dcc & SA_DCP_DCC) { 2875 struct scsi_data_compression_page *dcp = &cpage->dcomp; 2876 if (calg == 0) { 2877 /* 2878 * Disable compression, but leave the 2879 * decompression and the capability bit 2880 * alone. 2881 */ 2882 dcp->dce_and_dcc = SA_DCP_DCC; 2883 dcp->dde_and_red |= SA_DCP_DDE; 2884 break; 2885 } 2886 /* enable compression && decompression */ 2887 dcp->dce_and_dcc = SA_DCP_DCE | SA_DCP_DCC; 2888 dcp->dde_and_red |= SA_DCP_DDE; 2889 /* 2890 * If there, use compression algorithm from caller. 2891 * Otherwise, if there's a saved compression algorithm 2892 * and there is no current algorithm, use the saved 2893 * algorithm. Else parrot back what we got and hope 2894 * for the best. 2895 */ 2896 if (calg != MT_COMP_ENABLE) { 2897 scsi_ulto4b(calg, dcp->comp_algorithm); 2898 scsi_ulto4b(calg, dcp->decomp_algorithm); 2899 } else if (scsi_4btoul(dcp->comp_algorithm) == 0 && 2900 softc->saved_comp_algorithm != 0) { 2901 scsi_ulto4b(softc->saved_comp_algorithm, 2902 dcp->comp_algorithm); 2903 scsi_ulto4b(softc->saved_comp_algorithm, 2904 dcp->decomp_algorithm); 2905 } 2906 break; 2907 } 2908 /* 2909 * Compression does not appear to be supported- 2910 * at least via the DATA COMPRESSION page. It 2911 * would be too much to ask us to believe that 2912 * the page itself is supported, but incorrectly 2913 * reports an ability to manipulate data compression, 2914 * so we'll assume that this device doesn't support 2915 * compression. We can just fall through for that. 2916 */ 2917 /* FALLTHROUGH */ 2918 default: 2919 /* 2920 * The drive doesn't seem to support compression, 2921 * so turn off the set compression bit. 2922 */ 2923 params_to_set &= ~SA_PARAM_COMPRESSION; 2924 xpt_print(periph->path, 2925 "device does not seem to support compression\n"); 2926 2927 /* 2928 * If that was the only thing the user wanted us to set, 2929 * clean up allocated resources and return with 2930 * 'operation not supported'. 2931 */ 2932 if (params_to_set == SA_PARAM_NONE) { 2933 kfree(mode_buffer, M_SCSISA); 2934 xpt_release_ccb(ccb); 2935 return (ENODEV); 2936 } 2937 2938 /* 2939 * That wasn't the only thing the user wanted us to set. 2940 * So, decrease the stated mode buffer length by the 2941 * size of the compression mode page. 2942 */ 2943 mode_buffer_len -= sizeof(sa_comp_t); 2944 } 2945 } 2946 2947 /* It is safe to retry this operation */ 2948 scsi_mode_select(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, 2949 (params_to_set & SA_PARAM_COMPRESSION)? TRUE : FALSE, 2950 FALSE, mode_buffer, mode_buffer_len, SSD_FULL_SIZE, SCSIOP_TIMEOUT); 2951 2952 error = cam_periph_runccb(ccb, saerror, 0, 2953 sense_flags, &softc->device_stats); 2954 QFRLS(ccb); 2955 2956 if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) { 2957 int idx; 2958 char *xyz = mode_buffer; 2959 xpt_print_path(periph->path); 2960 kprintf("Err%d, Mode Select Data=", error); 2961 for (idx = 0; idx < mode_buffer_len; idx++) 2962 kprintf(" 0x%02x", xyz[idx] & 0xff); 2963 kprintf("\n"); 2964 } 2965 2966 2967 if (error) { 2968 /* 2969 * If we can, try without setting density/blocksize. 2970 */ 2971 if (mode_blk) { 2972 if ((params_to_set & 2973 (SA_PARAM_DENSITY|SA_PARAM_BLOCKSIZE)) == 0) { 2974 mode_blk = NULL; 2975 goto retry; 2976 } 2977 } else { 2978 mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1]; 2979 cpage = (sa_comp_t *)&mode_blk[1]; 2980 } 2981 2982 /* 2983 * If we were setting the blocksize, and that failed, we 2984 * want to set it to its original value. If we weren't 2985 * setting the blocksize, we don't want to change it. 2986 */ 2987 scsi_ulto3b(current_blocksize, mode_blk->blklen); 2988 2989 /* 2990 * Set density if requested, else preserve old density. 2991 * SCSI_SAME_DENSITY only applies to SCSI-2 or better 2992 * devices, else density we've latched up in our softc. 2993 */ 2994 if (params_to_set & SA_PARAM_DENSITY) { 2995 mode_blk->density = current_density; 2996 } else if (softc->scsi_rev > SCSI_REV_CCS) { 2997 mode_blk->density = SCSI_SAME_DENSITY; 2998 } else { 2999 mode_blk->density = softc->media_density; 3000 } 3001 3002 if (params_to_set & SA_PARAM_COMPRESSION) 3003 bcopy(ccomp, cpage, sizeof (sa_comp_t)); 3004 3005 /* 3006 * The retry count is the only CCB field that might have been 3007 * changed that we care about, so reset it back to 1. 3008 */ 3009 ccb->ccb_h.retry_count = 1; 3010 cam_periph_runccb(ccb, saerror, 0, sense_flags, 3011 &softc->device_stats); 3012 QFRLS(ccb); 3013 } 3014 3015 xpt_release_ccb(ccb); 3016 3017 if (ccomp != NULL) 3018 kfree(ccomp, M_SCSISA); 3019 3020 if (params_to_set & SA_PARAM_COMPRESSION) { 3021 if (error) { 3022 softc->flags &= ~SA_FLAG_COMP_ENABLED; 3023 /* 3024 * Even if we get an error setting compression, 3025 * do not say that we don't support it. We could 3026 * have been wrong, or it may be media specific. 3027 * softc->flags &= ~SA_FLAG_COMP_SUPP; 3028 */ 3029 softc->saved_comp_algorithm = softc->comp_algorithm; 3030 softc->comp_algorithm = 0; 3031 } else { 3032 softc->flags |= SA_FLAG_COMP_ENABLED; 3033 softc->comp_algorithm = calg; 3034 } 3035 } 3036 3037 kfree(mode_buffer, M_SCSISA); 3038 return (error); 3039 } 3040 3041 static void 3042 saprevent(struct cam_periph *periph, int action) 3043 { 3044 struct sa_softc *softc; 3045 union ccb *ccb; 3046 int error, sf; 3047 3048 softc = (struct sa_softc *)periph->softc; 3049 3050 if ((action == PR_ALLOW) && (softc->flags & SA_FLAG_TAPE_LOCKED) == 0) 3051 return; 3052 if ((action == PR_PREVENT) && (softc->flags & SA_FLAG_TAPE_LOCKED) != 0) 3053 return; 3054 3055 /* 3056 * We can be quiet about illegal requests. 3057 */ 3058 if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) { 3059 sf = 0; 3060 } else 3061 sf = SF_QUIET_IR; 3062 3063 ccb = cam_periph_getccb(periph, 1); 3064 3065 /* It is safe to retry this operation */ 3066 scsi_prevent(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, action, 3067 SSD_FULL_SIZE, SCSIOP_TIMEOUT); 3068 3069 error = cam_periph_runccb(ccb, saerror, 0, sf, &softc->device_stats); 3070 QFRLS(ccb); 3071 if (error == 0) { 3072 if (action == PR_ALLOW) 3073 softc->flags &= ~SA_FLAG_TAPE_LOCKED; 3074 else 3075 softc->flags |= SA_FLAG_TAPE_LOCKED; 3076 } 3077 3078 xpt_release_ccb(ccb); 3079 } 3080 3081 static int 3082 sarewind(struct cam_periph *periph) 3083 { 3084 union ccb *ccb; 3085 struct sa_softc *softc; 3086 int error; 3087 3088 softc = (struct sa_softc *)periph->softc; 3089 3090 ccb = cam_periph_getccb(periph, 1); 3091 3092 /* It is safe to retry this operation */ 3093 scsi_rewind(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, FALSE, 3094 SSD_FULL_SIZE, REWIND_TIMEOUT); 3095 3096 softc->dsreg = MTIO_DSREG_REW; 3097 error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats); 3098 softc->dsreg = MTIO_DSREG_REST; 3099 3100 if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 3101 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE); 3102 3103 xpt_release_ccb(ccb); 3104 if (error == 0) 3105 softc->fileno = softc->blkno = (daddr_t) 0; 3106 else 3107 softc->fileno = softc->blkno = (daddr_t) -1; 3108 return (error); 3109 } 3110 3111 static int 3112 saspace(struct cam_periph *periph, int count, scsi_space_code code) 3113 { 3114 union ccb *ccb; 3115 struct sa_softc *softc; 3116 int error; 3117 3118 softc = (struct sa_softc *)periph->softc; 3119 3120 ccb = cam_periph_getccb(periph, 1); 3121 3122 /* This cannot be retried */ 3123 3124 scsi_space(&ccb->csio, 0, sadone, MSG_SIMPLE_Q_TAG, code, count, 3125 SSD_FULL_SIZE, SPACE_TIMEOUT); 3126 3127 /* 3128 * Clear residual because we will be using it. 3129 */ 3130 softc->last_ctl_resid = 0; 3131 3132 softc->dsreg = (count < 0)? MTIO_DSREG_REV : MTIO_DSREG_FWD; 3133 error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats); 3134 softc->dsreg = MTIO_DSREG_REST; 3135 3136 if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 3137 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE); 3138 3139 xpt_release_ccb(ccb); 3140 3141 /* 3142 * If a spacing operation has failed, we need to invalidate 3143 * this mount. 3144 * 3145 * If the spacing operation was setmarks or to end of recorded data, 3146 * we no longer know our relative position. 3147 * 3148 * If the spacing operations was spacing files in reverse, we 3149 * take account of the residual, but still check against less 3150 * than zero- if we've gone negative, we must have hit BOT. 3151 * 3152 * If the spacing operations was spacing records in reverse and 3153 * we have a residual, we've either hit BOT or hit a filemark. 3154 * In the former case, we know our new record number (0). In 3155 * the latter case, we have absolutely no idea what the real 3156 * record number is- we've stopped between the end of the last 3157 * record in the previous file and the filemark that stopped 3158 * our spacing backwards. 3159 */ 3160 if (error) { 3161 softc->fileno = softc->blkno = (daddr_t) -1; 3162 } else if (code == SS_SETMARKS || code == SS_EOD) { 3163 softc->fileno = softc->blkno = (daddr_t) -1; 3164 } else if (code == SS_FILEMARKS && softc->fileno != (daddr_t) -1) { 3165 softc->fileno += (count - softc->last_ctl_resid); 3166 if (softc->fileno < 0) /* we must of hit BOT */ 3167 softc->fileno = 0; 3168 softc->blkno = 0; 3169 } else if (code == SS_BLOCKS && softc->blkno != (daddr_t) -1) { 3170 softc->blkno += (count - softc->last_ctl_resid); 3171 if (count < 0) { 3172 if (softc->last_ctl_resid || softc->blkno < 0) { 3173 if (softc->fileno == 0) { 3174 softc->blkno = 0; 3175 } else { 3176 softc->blkno = (daddr_t) -1; 3177 } 3178 } 3179 } 3180 } 3181 return (error); 3182 } 3183 3184 static int 3185 sawritefilemarks(struct cam_periph *periph, int nmarks, int setmarks) 3186 { 3187 union ccb *ccb; 3188 struct sa_softc *softc; 3189 int error, nwm = 0; 3190 3191 softc = (struct sa_softc *)periph->softc; 3192 if (softc->open_rdonly) 3193 return (EBADF); 3194 3195 ccb = cam_periph_getccb(periph, 1); 3196 /* 3197 * Clear residual because we will be using it. 3198 */ 3199 softc->last_ctl_resid = 0; 3200 3201 softc->dsreg = MTIO_DSREG_FMK; 3202 /* this *must* not be retried */ 3203 scsi_write_filemarks(&ccb->csio, 0, sadone, MSG_SIMPLE_Q_TAG, 3204 FALSE, setmarks, nmarks, SSD_FULL_SIZE, IO_TIMEOUT); 3205 softc->dsreg = MTIO_DSREG_REST; 3206 3207 3208 error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats); 3209 3210 if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 3211 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE); 3212 3213 if (error == 0 && nmarks) { 3214 struct sa_softc *softc = (struct sa_softc *)periph->softc; 3215 nwm = nmarks - softc->last_ctl_resid; 3216 softc->filemarks += nwm; 3217 } 3218 3219 xpt_release_ccb(ccb); 3220 3221 /* 3222 * Update relative positions (if we're doing that). 3223 */ 3224 if (error) { 3225 softc->fileno = softc->blkno = (daddr_t) -1; 3226 } else if (softc->fileno != (daddr_t) -1) { 3227 softc->fileno += nwm; 3228 softc->blkno = 0; 3229 } 3230 return (error); 3231 } 3232 3233 static int 3234 sardpos(struct cam_periph *periph, int hard, u_int32_t *blkptr) 3235 { 3236 struct scsi_tape_position_data loc; 3237 union ccb *ccb; 3238 struct sa_softc *softc = (struct sa_softc *)periph->softc; 3239 int error; 3240 3241 /* 3242 * We try and flush any buffered writes here if we were writing 3243 * and we're trying to get hardware block position. It eats 3244 * up performance substantially, but I'm wary of drive firmware. 3245 * 3246 * I think that *logical* block position is probably okay- 3247 * but hardware block position might have to wait for data 3248 * to hit media to be valid. Caveat Emptor. 3249 */ 3250 3251 if (hard && (softc->flags & SA_FLAG_TAPE_WRITTEN)) { 3252 error = sawritefilemarks(periph, 0, 0); 3253 if (error && error != EACCES) 3254 return (error); 3255 } 3256 3257 ccb = cam_periph_getccb(periph, 1); 3258 scsi_read_position(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG, 3259 hard, &loc, SSD_FULL_SIZE, SCSIOP_TIMEOUT); 3260 softc->dsreg = MTIO_DSREG_RBSY; 3261 error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats); 3262 softc->dsreg = MTIO_DSREG_REST; 3263 if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 3264 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, 0); 3265 3266 if (error == 0) { 3267 if (loc.flags & SA_RPOS_UNCERTAIN) { 3268 error = EINVAL; /* nothing is certain */ 3269 } else { 3270 *blkptr = scsi_4btoul(loc.firstblk); 3271 } 3272 } 3273 3274 xpt_release_ccb(ccb); 3275 return (error); 3276 } 3277 3278 static int 3279 sasetpos(struct cam_periph *periph, int hard, u_int32_t *blkptr) 3280 { 3281 union ccb *ccb; 3282 struct sa_softc *softc; 3283 int error; 3284 3285 /* 3286 * We used to try and flush any buffered writes here. 3287 * Now we push this onto user applications to either 3288 * flush the pending writes themselves (via a zero count 3289 * WRITE FILEMARKS command) or they can trust their tape 3290 * drive to do this correctly for them. 3291 */ 3292 3293 softc = (struct sa_softc *)periph->softc; 3294 ccb = cam_periph_getccb(periph, 1); 3295 3296 3297 scsi_set_position(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG, 3298 hard, *blkptr, SSD_FULL_SIZE, SPACE_TIMEOUT); 3299 3300 3301 softc->dsreg = MTIO_DSREG_POS; 3302 error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats); 3303 softc->dsreg = MTIO_DSREG_REST; 3304 if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 3305 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, 0); 3306 xpt_release_ccb(ccb); 3307 /* 3308 * Note relative file && block number position as now unknown. 3309 */ 3310 softc->fileno = softc->blkno = (daddr_t) -1; 3311 return (error); 3312 } 3313 3314 static int 3315 saretension(struct cam_periph *periph) 3316 { 3317 union ccb *ccb; 3318 struct sa_softc *softc; 3319 int error; 3320 3321 softc = (struct sa_softc *)periph->softc; 3322 3323 ccb = cam_periph_getccb(periph, 1); 3324 3325 /* It is safe to retry this operation */ 3326 scsi_load_unload(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, FALSE, 3327 FALSE, TRUE, TRUE, SSD_FULL_SIZE, ERASE_TIMEOUT); 3328 3329 softc->dsreg = MTIO_DSREG_TEN; 3330 error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats); 3331 softc->dsreg = MTIO_DSREG_REST; 3332 3333 if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 3334 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE); 3335 xpt_release_ccb(ccb); 3336 if (error == 0) 3337 softc->fileno = softc->blkno = (daddr_t) 0; 3338 else 3339 softc->fileno = softc->blkno = (daddr_t) -1; 3340 return (error); 3341 } 3342 3343 static int 3344 sareservereleaseunit(struct cam_periph *periph, int reserve) 3345 { 3346 union ccb *ccb; 3347 struct sa_softc *softc; 3348 int error; 3349 3350 softc = (struct sa_softc *)periph->softc; 3351 ccb = cam_periph_getccb(periph, 1); 3352 3353 /* It is safe to retry this operation */ 3354 scsi_reserve_release_unit(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, 3355 FALSE, 0, SSD_FULL_SIZE, SCSIOP_TIMEOUT, reserve); 3356 softc->dsreg = MTIO_DSREG_RBSY; 3357 error = cam_periph_runccb(ccb, saerror, 0, 3358 SF_RETRY_UA | SF_NO_PRINT, &softc->device_stats); 3359 softc->dsreg = MTIO_DSREG_REST; 3360 QFRLS(ccb); 3361 xpt_release_ccb(ccb); 3362 3363 /* 3364 * If the error was Illegal Request, then the device doesn't support 3365 * RESERVE/RELEASE. This is not an error. 3366 */ 3367 if (error == EINVAL) { 3368 error = 0; 3369 } 3370 3371 return (error); 3372 } 3373 3374 static int 3375 saloadunload(struct cam_periph *periph, int load) 3376 { 3377 union ccb *ccb; 3378 struct sa_softc *softc; 3379 int error; 3380 3381 softc = (struct sa_softc *)periph->softc; 3382 3383 ccb = cam_periph_getccb(periph, 1); 3384 3385 /* It is safe to retry this operation */ 3386 scsi_load_unload(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, FALSE, 3387 FALSE, FALSE, load, SSD_FULL_SIZE, REWIND_TIMEOUT); 3388 3389 softc->dsreg = (load)? MTIO_DSREG_LD : MTIO_DSREG_UNL; 3390 error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats); 3391 softc->dsreg = MTIO_DSREG_REST; 3392 QFRLS(ccb); 3393 xpt_release_ccb(ccb); 3394 3395 if (error || load == 0) 3396 softc->fileno = softc->blkno = (daddr_t) -1; 3397 else if (error == 0) 3398 softc->fileno = softc->blkno = (daddr_t) 0; 3399 return (error); 3400 } 3401 3402 static int 3403 saerase(struct cam_periph *periph, int longerase) 3404 { 3405 3406 union ccb *ccb; 3407 struct sa_softc *softc; 3408 int error; 3409 3410 softc = (struct sa_softc *)periph->softc; 3411 if (softc->open_rdonly) 3412 return (EBADF); 3413 3414 ccb = cam_periph_getccb(periph, 1); 3415 3416 scsi_erase(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG, FALSE, longerase, 3417 SSD_FULL_SIZE, ERASE_TIMEOUT); 3418 3419 softc->dsreg = MTIO_DSREG_ZER; 3420 error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats); 3421 softc->dsreg = MTIO_DSREG_REST; 3422 3423 if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 3424 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE); 3425 xpt_release_ccb(ccb); 3426 return (error); 3427 } 3428 3429 #endif /* _KERNEL */ 3430 3431 /* 3432 * Read tape block limits command. 3433 */ 3434 void 3435 scsi_read_block_limits(struct ccb_scsiio *csio, u_int32_t retries, 3436 void (*cbfcnp)(struct cam_periph *, union ccb *), 3437 u_int8_t tag_action, 3438 struct scsi_read_block_limits_data *rlimit_buf, 3439 u_int8_t sense_len, u_int32_t timeout) 3440 { 3441 struct scsi_read_block_limits *scsi_cmd; 3442 3443 cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_IN, tag_action, 3444 (u_int8_t *)rlimit_buf, sizeof(*rlimit_buf), sense_len, 3445 sizeof(*scsi_cmd), timeout); 3446 3447 scsi_cmd = (struct scsi_read_block_limits *)&csio->cdb_io.cdb_bytes; 3448 bzero(scsi_cmd, sizeof(*scsi_cmd)); 3449 scsi_cmd->opcode = READ_BLOCK_LIMITS; 3450 } 3451 3452 void 3453 scsi_sa_read_write(struct ccb_scsiio *csio, u_int32_t retries, 3454 void (*cbfcnp)(struct cam_periph *, union ccb *), 3455 u_int8_t tag_action, int readop, int sli, 3456 int fixed, u_int32_t length, u_int8_t *data_ptr, 3457 u_int32_t dxfer_len, u_int8_t sense_len, u_int32_t timeout) 3458 { 3459 struct scsi_sa_rw *scsi_cmd; 3460 3461 scsi_cmd = (struct scsi_sa_rw *)&csio->cdb_io.cdb_bytes; 3462 scsi_cmd->opcode = readop ? SA_READ : SA_WRITE; 3463 scsi_cmd->sli_fixed = 0; 3464 if (sli && readop) 3465 scsi_cmd->sli_fixed |= SAR_SLI; 3466 if (fixed) 3467 scsi_cmd->sli_fixed |= SARW_FIXED; 3468 scsi_ulto3b(length, scsi_cmd->length); 3469 scsi_cmd->control = 0; 3470 3471 cam_fill_csio(csio, retries, cbfcnp, readop ? CAM_DIR_IN : CAM_DIR_OUT, 3472 tag_action, data_ptr, dxfer_len, sense_len, 3473 sizeof(*scsi_cmd), timeout); 3474 } 3475 3476 void 3477 scsi_load_unload(struct ccb_scsiio *csio, u_int32_t retries, 3478 void (*cbfcnp)(struct cam_periph *, union ccb *), 3479 u_int8_t tag_action, int immediate, int eot, 3480 int reten, int load, u_int8_t sense_len, 3481 u_int32_t timeout) 3482 { 3483 struct scsi_load_unload *scsi_cmd; 3484 3485 scsi_cmd = (struct scsi_load_unload *)&csio->cdb_io.cdb_bytes; 3486 bzero(scsi_cmd, sizeof(*scsi_cmd)); 3487 scsi_cmd->opcode = LOAD_UNLOAD; 3488 if (immediate) 3489 scsi_cmd->immediate = SLU_IMMED; 3490 if (eot) 3491 scsi_cmd->eot_reten_load |= SLU_EOT; 3492 if (reten) 3493 scsi_cmd->eot_reten_load |= SLU_RETEN; 3494 if (load) 3495 scsi_cmd->eot_reten_load |= SLU_LOAD; 3496 3497 cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, 3498 NULL, 0, sense_len, sizeof(*scsi_cmd), timeout); 3499 } 3500 3501 void 3502 scsi_rewind(struct ccb_scsiio *csio, u_int32_t retries, 3503 void (*cbfcnp)(struct cam_periph *, union ccb *), 3504 u_int8_t tag_action, int immediate, u_int8_t sense_len, 3505 u_int32_t timeout) 3506 { 3507 struct scsi_rewind *scsi_cmd; 3508 3509 scsi_cmd = (struct scsi_rewind *)&csio->cdb_io.cdb_bytes; 3510 bzero(scsi_cmd, sizeof(*scsi_cmd)); 3511 scsi_cmd->opcode = REWIND; 3512 if (immediate) 3513 scsi_cmd->immediate = SREW_IMMED; 3514 3515 cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL, 3516 0, sense_len, sizeof(*scsi_cmd), timeout); 3517 } 3518 3519 void 3520 scsi_space(struct ccb_scsiio *csio, u_int32_t retries, 3521 void (*cbfcnp)(struct cam_periph *, union ccb *), 3522 u_int8_t tag_action, scsi_space_code code, 3523 u_int32_t count, u_int8_t sense_len, u_int32_t timeout) 3524 { 3525 struct scsi_space *scsi_cmd; 3526 3527 scsi_cmd = (struct scsi_space *)&csio->cdb_io.cdb_bytes; 3528 scsi_cmd->opcode = SPACE; 3529 scsi_cmd->code = code; 3530 scsi_ulto3b(count, scsi_cmd->count); 3531 scsi_cmd->control = 0; 3532 3533 cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL, 3534 0, sense_len, sizeof(*scsi_cmd), timeout); 3535 } 3536 3537 void 3538 scsi_write_filemarks(struct ccb_scsiio *csio, u_int32_t retries, 3539 void (*cbfcnp)(struct cam_periph *, union ccb *), 3540 u_int8_t tag_action, int immediate, int setmark, 3541 u_int32_t num_marks, u_int8_t sense_len, 3542 u_int32_t timeout) 3543 { 3544 struct scsi_write_filemarks *scsi_cmd; 3545 3546 scsi_cmd = (struct scsi_write_filemarks *)&csio->cdb_io.cdb_bytes; 3547 bzero(scsi_cmd, sizeof(*scsi_cmd)); 3548 scsi_cmd->opcode = WRITE_FILEMARKS; 3549 if (immediate) 3550 scsi_cmd->byte2 |= SWFMRK_IMMED; 3551 if (setmark) 3552 scsi_cmd->byte2 |= SWFMRK_WSMK; 3553 3554 scsi_ulto3b(num_marks, scsi_cmd->num_marks); 3555 3556 cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL, 3557 0, sense_len, sizeof(*scsi_cmd), timeout); 3558 } 3559 3560 /* 3561 * The reserve and release unit commands differ only by their opcodes. 3562 */ 3563 void 3564 scsi_reserve_release_unit(struct ccb_scsiio *csio, u_int32_t retries, 3565 void (*cbfcnp)(struct cam_periph *, union ccb *), 3566 u_int8_t tag_action, int third_party, 3567 int third_party_id, u_int8_t sense_len, 3568 u_int32_t timeout, int reserve) 3569 { 3570 struct scsi_reserve_release_unit *scsi_cmd; 3571 3572 scsi_cmd = (struct scsi_reserve_release_unit *)&csio->cdb_io.cdb_bytes; 3573 bzero(scsi_cmd, sizeof(*scsi_cmd)); 3574 3575 if (reserve) 3576 scsi_cmd->opcode = RESERVE_UNIT; 3577 else 3578 scsi_cmd->opcode = RELEASE_UNIT; 3579 3580 if (third_party) { 3581 scsi_cmd->lun_thirdparty |= SRRU_3RD_PARTY; 3582 scsi_cmd->lun_thirdparty |= 3583 ((third_party_id << SRRU_3RD_SHAMT) & SRRU_3RD_MASK); 3584 } 3585 3586 cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL, 3587 0, sense_len, sizeof(*scsi_cmd), timeout); 3588 } 3589 3590 void 3591 scsi_erase(struct ccb_scsiio *csio, u_int32_t retries, 3592 void (*cbfcnp)(struct cam_periph *, union ccb *), 3593 u_int8_t tag_action, int immediate, int long_erase, 3594 u_int8_t sense_len, u_int32_t timeout) 3595 { 3596 struct scsi_erase *scsi_cmd; 3597 3598 scsi_cmd = (struct scsi_erase *)&csio->cdb_io.cdb_bytes; 3599 bzero(scsi_cmd, sizeof(*scsi_cmd)); 3600 3601 scsi_cmd->opcode = ERASE; 3602 3603 if (immediate) 3604 scsi_cmd->lun_imm_long |= SE_IMMED; 3605 3606 if (long_erase) 3607 scsi_cmd->lun_imm_long |= SE_LONG; 3608 3609 cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL, 3610 0, sense_len, sizeof(*scsi_cmd), timeout); 3611 } 3612 3613 /* 3614 * Read Tape Position command. 3615 */ 3616 void 3617 scsi_read_position(struct ccb_scsiio *csio, u_int32_t retries, 3618 void (*cbfcnp)(struct cam_periph *, union ccb *), 3619 u_int8_t tag_action, int hardsoft, 3620 struct scsi_tape_position_data *sbp, 3621 u_int8_t sense_len, u_int32_t timeout) 3622 { 3623 struct scsi_tape_read_position *scmd; 3624 3625 cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_IN, tag_action, 3626 (u_int8_t *)sbp, sizeof (*sbp), sense_len, sizeof(*scmd), timeout); 3627 scmd = (struct scsi_tape_read_position *)&csio->cdb_io.cdb_bytes; 3628 bzero(scmd, sizeof(*scmd)); 3629 scmd->opcode = READ_POSITION; 3630 scmd->byte1 = hardsoft; 3631 } 3632 3633 /* 3634 * Set Tape Position command. 3635 */ 3636 void 3637 scsi_set_position(struct ccb_scsiio *csio, u_int32_t retries, 3638 void (*cbfcnp)(struct cam_periph *, union ccb *), 3639 u_int8_t tag_action, int hardsoft, u_int32_t blkno, 3640 u_int8_t sense_len, u_int32_t timeout) 3641 { 3642 struct scsi_tape_locate *scmd; 3643 3644 cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, 3645 NULL, 0, sense_len, sizeof(*scmd), timeout); 3646 scmd = (struct scsi_tape_locate *)&csio->cdb_io.cdb_bytes; 3647 bzero(scmd, sizeof(*scmd)); 3648 scmd->opcode = LOCATE; 3649 if (hardsoft) 3650 scmd->byte1 |= SA_SPOS_BT; 3651 scsi_ulto4b(blkno, scmd->blkaddr); 3652 } 3653