sys/cam/scsi/scsi_sa.c

   1 /*-
   2  * Implementation of SCSI Sequential Access Peripheral driver for CAM.
   3  *
   4  * Copyright (c) 1999, 2000 Matthew Jacob
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions, and the following disclaimer,
  12  *    without modification, immediately at the beginning of the file.
  13  * 2. The name of the author may not be used to endorse or promote products
  14  *    derived from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  20  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 #include <sys/cdefs.h>
  30 __FBSDID("$FreeBSD$");
  31
  32 #include <sys/param.h>
  33 #include <sys/queue.h>
  34 #ifdef _KERNEL
  35 #include <sys/systm.h>
  36 #include <sys/kernel.h>
  37 #endif
  38 #include <sys/types.h>
  39 #include <sys/time.h>
  40 #include <sys/bio.h>
  41 #include <sys/limits.h>
  42 #include <sys/malloc.h>
  43 #include <sys/mtio.h>
  44 #ifdef _KERNEL
  45 #include <sys/conf.h>
  46 #endif
  47 #include <sys/fcntl.h>
  48 #include <sys/devicestat.h>
  49
  50 #ifndef _KERNEL
  51 #include <stdio.h>
  52 #include <string.h>
  53 #endif
  54
  55 #include <cam/cam.h>
  56 #include <cam/cam_ccb.h>
  57 #include <cam/cam_periph.h>
  58 #include <cam/cam_xpt_periph.h>
  59 #include <cam/cam_debug.h>
  60
  61 #include <cam/scsi/scsi_all.h>
  62 #include <cam/scsi/scsi_message.h>
  63 #include <cam/scsi/scsi_sa.h>
  64
  65 #ifdef _KERNEL
  66
  67 #include <opt_sa.h>
  68
  69 #ifndef SA_IO_TIMEOUT
  70 #define SA_IO_TIMEOUT           4
  71 #endif
  72 #ifndef SA_SPACE_TIMEOUT
  73 #define SA_SPACE_TIMEOUT        1 * 60
  74 #endif
  75 #ifndef SA_REWIND_TIMEOUT
  76 #define SA_REWIND_TIMEOUT       2 * 60
  77 #endif
  78 #ifndef SA_ERASE_TIMEOUT
  79 #define SA_ERASE_TIMEOUT        4 * 60
  80 #endif
  81
  82 #define SCSIOP_TIMEOUT          (60 * 1000)     /* not an option */
  83
  84 #define IO_TIMEOUT              (SA_IO_TIMEOUT * 60 * 1000)
  85 #define REWIND_TIMEOUT          (SA_REWIND_TIMEOUT * 60 * 1000)
  86 #define ERASE_TIMEOUT           (SA_ERASE_TIMEOUT * 60 * 1000)
  87 #define SPACE_TIMEOUT           (SA_SPACE_TIMEOUT * 60 * 1000)
  88
  89 /*
  90  * Additional options that can be set for config: SA_1FM_AT_EOT
  91  */
  92
  93 #ifndef UNUSED_PARAMETER
  94 #define UNUSED_PARAMETER(x)     x = x
  95 #endif
  96
  97 #define QFRLS(ccb)      \
  98         if (((ccb)->ccb_h.status & CAM_DEV_QFRZN) != 0) \
  99                 cam_release_devq((ccb)->ccb_h.path, 0, 0, 0, FALSE)
 100
 101 /*
 102  * Driver states
 103  */
 104
 105 MALLOC_DEFINE(M_SCSISA, "SCSI sa", "SCSI sequential access buffers");
 106
 107 typedef enum {
 108         SA_STATE_NORMAL, SA_STATE_ABNORMAL
 109 } sa_state;
 110
 111 #define ccb_pflags      ppriv_field0
 112 #define ccb_bp          ppriv_ptr1
 113
 114 #define SA_CCB_BUFFER_IO        0x0
 115 #define SA_CCB_WAITING          0x1
 116 #define SA_CCB_TYPEMASK         0x1
 117 #define SA_POSITION_UPDATED     0x2
 118
 119 #define Set_CCB_Type(x, type)                           \
 120         x->ccb_h.ccb_pflags &= ~SA_CCB_TYPEMASK;        \
 121         x->ccb_h.ccb_pflags |= type
 122
 123 #define CCB_Type(x)     (x->ccb_h.ccb_pflags & SA_CCB_TYPEMASK)
 124
 125
 126
 127 typedef enum {
 128         SA_FLAG_OPEN            = 0x0001,
 129         SA_FLAG_FIXED           = 0x0002,
 130         SA_FLAG_TAPE_LOCKED     = 0x0004,
 131         SA_FLAG_TAPE_MOUNTED    = 0x0008,
 132         SA_FLAG_TAPE_WP         = 0x0010,
 133         SA_FLAG_TAPE_WRITTEN    = 0x0020,
 134         SA_FLAG_EOM_PENDING     = 0x0040,
 135         SA_FLAG_EIO_PENDING     = 0x0080,
 136         SA_FLAG_EOF_PENDING     = 0x0100,
 137         SA_FLAG_ERR_PENDING     = (SA_FLAG_EOM_PENDING|SA_FLAG_EIO_PENDING|
 138                                    SA_FLAG_EOF_PENDING),
 139         SA_FLAG_INVALID         = 0x0200,
 140         SA_FLAG_COMP_ENABLED    = 0x0400,
 141         SA_FLAG_COMP_SUPP       = 0x0800,
 142         SA_FLAG_COMP_UNSUPP     = 0x1000,
 143         SA_FLAG_TAPE_FROZEN     = 0x2000
 144 } sa_flags;
 145
 146 typedef enum {
 147         SA_MODE_REWIND          = 0x00,
 148         SA_MODE_NOREWIND        = 0x01,
 149         SA_MODE_OFFLINE         = 0x02
 150 } sa_mode;
 151
 152 typedef enum {
 153         SA_PARAM_NONE           = 0x00,
 154         SA_PARAM_BLOCKSIZE      = 0x01,
 155         SA_PARAM_DENSITY        = 0x02,
 156         SA_PARAM_COMPRESSION    = 0x04,
 157         SA_PARAM_BUFF_MODE      = 0x08,
 158         SA_PARAM_NUMBLOCKS      = 0x10,
 159         SA_PARAM_WP             = 0x20,
 160         SA_PARAM_SPEED          = 0x40,
 161         SA_PARAM_ALL            = 0x7f
 162 } sa_params;
 163
 164 typedef enum {
 165         SA_QUIRK_NONE           = 0x00,
 166         SA_QUIRK_NOCOMP         = 0x01, /* Can't deal with compression at all */
 167         SA_QUIRK_FIXED          = 0x02, /* Force fixed mode */
 168         SA_QUIRK_VARIABLE       = 0x04, /* Force variable mode */
 169         SA_QUIRK_2FM            = 0x08, /* Needs Two File Marks at EOD */
 170         SA_QUIRK_1FM            = 0x10, /* No more than 1 File Mark at EOD */
 171         SA_QUIRK_NODREAD        = 0x20, /* Don't try and dummy read density */
 172         SA_QUIRK_NO_MODESEL     = 0x40, /* Don't do mode select at all */
 173         SA_QUIRK_NO_CPAGE       = 0x80  /* Don't use DEVICE COMPRESSION page */
 174 } sa_quirks;
 175
 176 #define SAMODE(z)       (dev2unit(z) & 0x3)
 177 #define SADENSITY(z)    ((dev2unit(z) >> 2) & 0x3)
 178 #define SA_IS_CTRL(z)   (dev2unit(z) & (1 << 4))
 179
 180 #define SA_NOT_CTLDEV   0
 181 #define SA_CTLDEV       1
 182
 183 #define SA_ATYPE_R      0
 184 #define SA_ATYPE_NR     1
 185 #define SA_ATYPE_ER     2
 186
 187 #define SAMINOR(ctl, mode, access) \
 188         ((ctl << 4) | (mode << 2) | (access & 0x3))
 189
 190 #define SA_NUM_MODES    4
 191 struct sa_devs {
 192         struct cdev *ctl_dev;
 193         struct sa_mode_devs {
 194                 struct cdev *r_dev;
 195                 struct cdev *nr_dev;
 196                 struct cdev *er_dev;
 197         } mode_devs[SA_NUM_MODES];
 198 };
 199
 200 struct sa_softc {
 201         sa_state        state;
 202         sa_flags        flags;
 203         sa_quirks       quirks;
 204         struct          bio_queue_head bio_queue;
 205         int             queue_count;
 206         struct          devstat *device_stats;
 207         struct sa_devs  devs;
 208         int             blk_gran;
 209         int             blk_mask;
 210         int             blk_shift;
 211         u_int32_t       max_blk;
 212         u_int32_t       min_blk;
 213         u_int32_t       comp_algorithm;
 214         u_int32_t       saved_comp_algorithm;
 215         u_int32_t       media_blksize;
 216         u_int32_t       last_media_blksize;
 217         u_int32_t       media_numblks;
 218         u_int8_t        media_density;
 219         u_int8_t        speed;
 220         u_int8_t        scsi_rev;
 221         u_int8_t        dsreg;          /* mtio mt_dsreg, redux */
 222         int             buffer_mode;
 223         int             filemarks;
 224         union           ccb saved_ccb;
 225         int             last_resid_was_io;
 226
 227         /*
 228          * Relative to BOT Location.
 229          */
 230         daddr_t         fileno;
 231         daddr_t         blkno;
 232
 233         /*
 234          * Latched Error Info
 235          */
 236         struct {
 237                 struct scsi_sense_data _last_io_sense;
 238                 u_int64_t _last_io_resid;
 239                 u_int8_t _last_io_cdb[CAM_MAX_CDBLEN];
 240                 struct scsi_sense_data _last_ctl_sense;
 241                 u_int64_t _last_ctl_resid;
 242                 u_int8_t _last_ctl_cdb[CAM_MAX_CDBLEN];
 243 #define last_io_sense   errinfo._last_io_sense
 244 #define last_io_resid   errinfo._last_io_resid
 245 #define last_io_cdb     errinfo._last_io_cdb
 246 #define last_ctl_sense  errinfo._last_ctl_sense
 247 #define last_ctl_resid  errinfo._last_ctl_resid
 248 #define last_ctl_cdb    errinfo._last_ctl_cdb
 249         } errinfo;
 250         /*
 251          * Misc other flags/state
 252          */
 253         u_int32_t
 254                                         : 29,
 255                 open_rdonly             : 1,    /* open read-only */
 256                 open_pending_mount      : 1,    /* open pending mount */
 257                 ctrl_mode               : 1;    /* control device open */
 258 };
 259
 260 struct sa_quirk_entry {
 261         struct scsi_inquiry_pattern inq_pat;    /* matching pattern */
 262         sa_quirks quirks;       /* specific quirk type */
 263         u_int32_t prefblk;      /* preferred blocksize when in fixed mode */
 264 };
 265
 266 static struct sa_quirk_entry sa_quirk_table[] =
 267 {
 268         {
 269                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "OnStream",
 270                   "ADR*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_NODREAD |
 271                    SA_QUIRK_1FM|SA_QUIRK_NO_MODESEL, 32768
 272         },
 273         {
 274                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
 275                   "Python 06408*", "*"}, SA_QUIRK_NODREAD, 0
 276         },
 277         {
 278                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
 279                   "Python 25601*", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_NODREAD, 0
 280         },
 281         {
 282                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
 283                   "Python*", "*"}, SA_QUIRK_NODREAD, 0
 284         },
 285         {
 286                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
 287                   "VIPER 150*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512
 288         },
 289         {
 290                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
 291                   "VIPER 2525 25462", "-011"},
 292                   SA_QUIRK_NOCOMP|SA_QUIRK_1FM|SA_QUIRK_NODREAD, 0
 293         },
 294         {
 295                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
 296                   "VIPER 2525*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 1024
 297         },
 298 #if     0
 299         {
 300                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
 301                   "C15*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_NO_CPAGE, 0,
 302         },
 303 #endif
 304         {
 305                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
 306                   "C56*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0
 307         },
 308         {
 309                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
 310                   "T20*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512
 311         },
 312         {
 313                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
 314                   "T4000*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512
 315         },
 316         {
 317                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
 318                   "HP-88780*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0
 319         },
 320         {
 321                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "KENNEDY",
 322                   "*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0
 323         },
 324         {
 325                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "M4 DATA",
 326                   "123107 SCSI*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0
 327         },
 328         {       /* jreynold@primenet.com */
 329                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "Seagate",
 330                 "STT8000N*", "*"}, SA_QUIRK_1FM, 0
 331         },
 332         {       /* mike@sentex.net */
 333                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "Seagate",
 334                 "STT20000*", "*"}, SA_QUIRK_1FM, 0
 335         },
 336         {
 337                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
 338                   " TDC 3600", "U07:"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512
 339         },
 340         {
 341                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
 342                   " TDC 3800", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512
 343         },
 344         {
 345                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
 346                   " TDC 4100", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512
 347         },
 348         {
 349                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
 350                   " TDC 4200", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512
 351         },
 352         {
 353                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
 354                   " SLR*", "*"}, SA_QUIRK_1FM, 0
 355         },
 356         {
 357                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "WANGTEK",
 358                   "5525ES*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512
 359         },
 360         {
 361                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "WANGTEK",
 362                   "51000*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 1024
 363         }
 364 };
 365
 366 static  d_open_t        saopen;
 367 static  d_close_t       saclose;
 368 static  d_strategy_t    sastrategy;
 369 static  d_ioctl_t       saioctl;
 370 static  periph_init_t   sainit;
 371 static  periph_ctor_t   saregister;
 372 static  periph_oninv_t  saoninvalidate;
 373 static  periph_dtor_t   sacleanup;
 374 static  periph_start_t  sastart;
 375 static  void            saasync(void *callback_arg, u_int32_t code,
 376                                 struct cam_path *path, void *arg);
 377 static  void            sadone(struct cam_periph *periph,
 378                                union ccb *start_ccb);
 379 static  int             saerror(union ccb *ccb, u_int32_t cam_flags,
 380                                 u_int32_t sense_flags);
 381 static int              samarkswanted(struct cam_periph *);
 382 static int              sacheckeod(struct cam_periph *periph);
 383 static int              sagetparams(struct cam_periph *periph,
 384                                     sa_params params_to_get,
 385                                     u_int32_t *blocksize, u_int8_t *density,
 386                                     u_int32_t *numblocks, int *buff_mode,
 387                                     u_int8_t *write_protect, u_int8_t *speed,
 388                                     int *comp_supported, int *comp_enabled,
 389                                     u_int32_t *comp_algorithm,
 390                                     sa_comp_t *comp_page);
 391 static int              sasetparams(struct cam_periph *periph,
 392                                     sa_params params_to_set,
 393                                     u_int32_t blocksize, u_int8_t density,
 394                                     u_int32_t comp_algorithm,
 395                                     u_int32_t sense_flags);
 396 static void             saprevent(struct cam_periph *periph, int action);
 397 static int              sarewind(struct cam_periph *periph);
 398 static int              saspace(struct cam_periph *periph, int count,
 399                                 scsi_space_code code);
 400 static int              samount(struct cam_periph *, int, struct cdev *);
 401 static int              saretension(struct cam_periph *periph);
 402 static int              sareservereleaseunit(struct cam_periph *periph,
 403                                              int reserve);
 404 static int              saloadunload(struct cam_periph *periph, int load);
 405 static int              saerase(struct cam_periph *periph, int longerase);
 406 static int              sawritefilemarks(struct cam_periph *periph,
 407                                          int nmarks, int setmarks);
 408 static int              sardpos(struct cam_periph *periph, int, u_int32_t *);
 409 static int              sasetpos(struct cam_periph *periph, int, u_int32_t *);
 410
 411
 412 static struct periph_driver sadriver =
 413 {
 414         sainit, "sa",
 415         TAILQ_HEAD_INITIALIZER(sadriver.units), /* generation */ 0
 416 };
 417
 418 PERIPHDRIVER_DECLARE(sa, sadriver);
 419
 420 /* For 2.2-stable support */
 421 #ifndef D_TAPE
 422 #define D_TAPE 0
 423 #endif
 424
 425
 426 static struct cdevsw sa_cdevsw = {
 427         .d_version =    D_VERSION,
 428         .d_open =       saopen,
 429         .d_close =      saclose,
 430         .d_read =       physread,
 431         .d_write =      physwrite,
 432         .d_ioctl =      saioctl,
 433         .d_strategy =   sastrategy,
 434         .d_name =       "sa",
 435         .d_flags =      D_TAPE | D_NEEDGIANT,
 436 };
 437
 438 static int
 439 saopen(struct cdev *dev, int flags, int fmt, struct thread *td)
 440 {
 441         struct cam_periph *periph;
 442         struct sa_softc *softc;
 443         int error;
 444
 445         periph = (struct cam_periph *)dev->si_drv1;
 446         if (cam_periph_acquire(periph) != CAM_REQ_CMP) {
 447                 return (ENXIO);
 448         }
 449
 450         cam_periph_lock(periph);
 451
 452         softc = (struct sa_softc *)periph->softc;
 453
 454         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE|CAM_DEBUG_INFO,
 455             ("saopen(%s): softc=0x%x\n", devtoname(dev), softc->flags));
 456
 457         if (SA_IS_CTRL(dev)) {
 458                 softc->ctrl_mode = 1;
 459                 cam_periph_unlock(periph);
 460                 return (0);
 461         }
 462
 463         if ((error = cam_periph_hold(periph, PRIBIO|PCATCH)) != 0) {
 464                 cam_periph_unlock(periph);
 465                 cam_periph_release(periph);
 466                 return (error);
 467         }
 468
 469         if (softc->flags & SA_FLAG_OPEN) {
 470                 error = EBUSY;
 471         } else if (softc->flags & SA_FLAG_INVALID) {
 472                 error = ENXIO;
 473         } else {
 474                 /*
 475                  * Preserve whether this is a read_only open.
 476                  */
 477                 softc->open_rdonly = (flags & O_RDWR) == O_RDONLY;
 478
 479                 /*
 480                  * The function samount ensures media is loaded and ready.
 481                  * It also does a device RESERVE if the tape isn't yet mounted.
 482                  *
 483                  * If the mount fails and this was a non-blocking open,
 484                  * make this a 'open_pending_mount' action.
 485                  */
 486                 error = samount(periph, flags, dev);
 487                 if (error && (flags & O_NONBLOCK)) {
 488                         softc->flags |= SA_FLAG_OPEN;
 489                         softc->open_pending_mount = 1;
 490                         cam_periph_unhold(periph);
 491                         cam_periph_unlock(periph);
 492                         return (0);
 493                 }
 494         }
 495
 496         if (error) {
 497                 cam_periph_unhold(periph);
 498                 cam_periph_unlock(periph);
 499                 cam_periph_release(periph);
 500                 return (error);
 501         }
 502
 503         saprevent(periph, PR_PREVENT);
 504         softc->flags |= SA_FLAG_OPEN;
 505
 506         cam_periph_unhold(periph);
 507         cam_periph_unlock(periph);
 508         return (error);
 509 }
 510
 511 static int
 512 saclose(struct cdev *dev, int flag, int fmt, struct thread *td)
 513 {
 514         struct  cam_periph *periph;
 515         struct  sa_softc *softc;
 516         int     mode, error, writing, tmp;
 517         int     closedbits = SA_FLAG_OPEN;
 518
 519         mode = SAMODE(dev);
 520         periph = (struct cam_periph *)dev->si_drv1;
 521         if (periph == NULL)
 522                 return (ENXIO);
 523
 524         cam_periph_lock(periph);
 525
 526         softc = (struct sa_softc *)periph->softc;
 527
 528         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE|CAM_DEBUG_INFO,
 529             ("saclose(%s): softc=0x%x\n", devtoname(dev), softc->flags));
 530
 531
 532         softc->open_rdonly = 0;
 533         if (SA_IS_CTRL(dev)) {
 534                 softc->ctrl_mode = 0;
 535                 cam_periph_unlock(periph);
 536                 cam_periph_release(periph);
 537                 return (0);
 538         }
 539
 540         if (softc->open_pending_mount) {
 541                 softc->flags &= ~SA_FLAG_OPEN;
 542                 softc->open_pending_mount = 0;
 543                 cam_periph_unlock(periph);
 544                 cam_periph_release(periph);
 545                 return (0);
 546         }
 547
 548         if ((error = cam_periph_hold(periph, PRIBIO)) != 0) {
 549                 cam_periph_unlock(periph);
 550                 return (error);
 551         }
 552
 553         /*
 554          * Were we writing the tape?
 555          */
 556         writing = (softc->flags & SA_FLAG_TAPE_WRITTEN) != 0;
 557
 558         /*
 559          * See whether or not we need to write filemarks. If this
 560          * fails, we probably have to assume we've lost tape
 561          * position.
 562          */
 563         error = sacheckeod(periph);
 564         if (error) {
 565                 xpt_print(periph->path,
 566                     "failed to write terminating filemark(s)\n");
 567                 softc->flags |= SA_FLAG_TAPE_FROZEN;
 568         }
 569
 570         /*
 571          * Whatever we end up doing, allow users to eject tapes from here on.
 572          */
 573         saprevent(periph, PR_ALLOW);
 574
 575         /*
 576          * Decide how to end...
 577          */
 578         if ((softc->flags & SA_FLAG_TAPE_MOUNTED) == 0) {
 579                 closedbits |= SA_FLAG_TAPE_FROZEN;
 580         } else switch (mode) {
 581         case SA_MODE_OFFLINE:
 582                 /*
 583                  * An 'offline' close is an unconditional release of
 584                  * frozen && mount conditions, irrespective of whether
 585                  * these operations succeeded. The reason for this is
 586                  * to allow at least some kind of programmatic way
 587                  * around our state getting all fouled up. If somebody
 588                  * issues an 'offline' command, that will be allowed
 589                  * to clear state.
 590                  */
 591                 (void) sarewind(periph);
 592                 (void) saloadunload(periph, FALSE);
 593                 closedbits |= SA_FLAG_TAPE_MOUNTED|SA_FLAG_TAPE_FROZEN;
 594                 break;
 595         case SA_MODE_REWIND:
 596                 /*
 597                  * If the rewind fails, return an error- if anyone cares,
 598                  * but not overwriting any previous error.
 599                  *
 600                  * We don't clear the notion of mounted here, but we do
 601                  * clear the notion of frozen if we successfully rewound.
 602                  */
 603                 tmp = sarewind(periph);
 604                 if (tmp) {
 605                         if (error != 0)
 606                                 error = tmp;
 607                 } else {
 608                         closedbits |= SA_FLAG_TAPE_FROZEN;
 609                 }
 610                 break;
 611         case SA_MODE_NOREWIND:
 612                 /*
 613                  * If we're not rewinding/unloading the tape, find out
 614                  * whether we need to back up over one of two filemarks
 615                  * we wrote (if we wrote two filemarks) so that appends
 616                  * from this point on will be sane.
 617                  */
 618                 if (error == 0 && writing && (softc->quirks & SA_QUIRK_2FM)) {
 619                         tmp = saspace(periph, -1, SS_FILEMARKS);
 620                         if (tmp) {
 621                                 xpt_print(periph->path, "unable to backspace "
 622                                     "over one of double filemarks at end of "
 623                                     "tape\n");
 624                                 xpt_print(periph->path, "it is possible that "
 625                                     "this device needs a SA_QUIRK_1FM quirk set"
 626                                     "for it\n");
 627                                 softc->flags |= SA_FLAG_TAPE_FROZEN;
 628                         }
 629                 }
 630                 break;
 631         default:
 632                 xpt_print(periph->path, "unknown mode 0x%x in saclose\n", mode);
 633                 /* NOTREACHED */
 634                 break;
 635         }
 636
 637         /*
 638          * We wish to note here that there are no more filemarks to be written.
 639          */
 640         softc->filemarks = 0;
 641         softc->flags &= ~SA_FLAG_TAPE_WRITTEN;
 642
 643         /*
 644          * And we are no longer open for business.
 645          */
 646         softc->flags &= ~closedbits;
 647
 648         /*
 649          * Inform users if tape state if frozen....
 650          */
 651         if (softc->flags & SA_FLAG_TAPE_FROZEN) {
 652                 xpt_print(periph->path, "tape is now frozen- use an OFFLINE, "
 653                     "REWIND or MTEOM command to clear this state.\n");
 654         }
 655
 656         /* release the device if it is no longer mounted */
 657         if ((softc->flags & SA_FLAG_TAPE_MOUNTED) == 0)
 658                 sareservereleaseunit(periph, FALSE);
 659
 660         cam_periph_unhold(periph);
 661         cam_periph_unlock(periph);
 662         cam_periph_release(periph);
 663
 664         return (error);
 665 }
 666
 667 /*
 668  * Actually translate the requested transfer into one the physical driver
 669  * can understand.  The transfer is described by a buf and will include
 670  * only one physical transfer.
 671  */
 672 static void
 673 sastrategy(struct bio *bp)
 674 {
 675         struct cam_periph *periph;
 676         struct sa_softc *softc;
 677
 678         bp->bio_resid = bp->bio_bcount;
 679         if (SA_IS_CTRL(bp->bio_dev)) {
 680                 biofinish(bp, NULL, EINVAL);
 681                 return;
 682         }
 683         periph = (struct cam_periph *)bp->bio_dev->si_drv1;
 684         if (periph == NULL) {
 685                 biofinish(bp, NULL, ENXIO);
 686                 return;
 687         }
 688         cam_periph_lock(periph);
 689
 690         softc = (struct sa_softc *)periph->softc;
 691
 692         if (softc->flags & SA_FLAG_INVALID) {
 693                 cam_periph_unlock(periph);
 694                 biofinish(bp, NULL, ENXIO);
 695                 return;
 696         }
 697
 698         if (softc->flags & SA_FLAG_TAPE_FROZEN) {
 699                 cam_periph_unlock(periph);
 700                 biofinish(bp, NULL, EPERM);
 701                 return;
 702         }
 703
 704         /*
 705          * This should actually never occur as the write(2)
 706          * system call traps attempts to write to a read-only
 707          * file descriptor.
 708          */
 709         if (bp->bio_cmd == BIO_WRITE && softc->open_rdonly) {
 710                 cam_periph_unlock(periph);
 711                 biofinish(bp, NULL, EBADF);
 712                 return;
 713         }
 714
 715         if (softc->open_pending_mount) {
 716                 int error = samount(periph, 0, bp->bio_dev);
 717                 if (error) {
 718                         cam_periph_unlock(periph);
 719                         biofinish(bp, NULL, ENXIO);
 720                         return;
 721                 }
 722                 saprevent(periph, PR_PREVENT);
 723                 softc->open_pending_mount = 0;
 724         }
 725
 726
 727         /*
 728          * If it's a null transfer, return immediately
 729          */
 730         if (bp->bio_bcount == 0) {
 731                 cam_periph_unlock(periph);
 732                 biodone(bp);
 733                 return;
 734         }
 735
 736         /* valid request?  */
 737         if (softc->flags & SA_FLAG_FIXED) {
 738                 /*
 739                  * Fixed block device.  The byte count must
 740                  * be a multiple of our block size.
 741                  */
 742                 if (((softc->blk_mask != ~0) &&
 743                     ((bp->bio_bcount & softc->blk_mask) != 0)) ||
 744                     ((softc->blk_mask == ~0) &&
 745                     ((bp->bio_bcount % softc->min_blk) != 0))) {
 746                         xpt_print(periph->path, "Invalid request.  Fixed block "
 747                             "device requests must be a multiple of %d bytes\n",
 748                             softc->min_blk);
 749                         cam_periph_unlock(periph);
 750                         biofinish(bp, NULL, EINVAL);
 751                         return;
 752                 }
 753         } else if ((bp->bio_bcount > softc->max_blk) ||
 754                    (bp->bio_bcount < softc->min_blk) ||
 755                    (bp->bio_bcount & softc->blk_mask) != 0) {
 756
 757                 xpt_print_path(periph->path);
 758                 printf("Invalid request.  Variable block "
 759                     "device requests must be ");
 760                 if (softc->blk_mask != 0) {
 761                         printf("a multiple of %d ", (0x1 << softc->blk_gran));
 762                 }
 763                 printf("between %d and %d bytes\n", softc->min_blk,
 764                     softc->max_blk);
 765                 cam_periph_unlock(periph);
 766                 biofinish(bp, NULL, EINVAL);
 767                 return;
 768         }
 769
 770         /*
 771          * Place it at the end of the queue.
 772          */
 773         bioq_insert_tail(&softc->bio_queue, bp);
 774         softc->queue_count++;
 775 #if     0
 776         CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
 777             ("sastrategy: queuing a %ld %s byte %s\n", bp->bio_bcount,
 778             (softc->flags & SA_FLAG_FIXED)?  "fixed" : "variable",
 779             (bp->bio_cmd == BIO_READ)? "read" : "write"));
 780 #endif
 781         if (softc->queue_count > 1) {
 782                 CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
 783                     ("sastrategy: queue count now %d\n", softc->queue_count));
 784         }
 785
 786         /*
 787          * Schedule ourselves for performing the work.
 788          */
 789         xpt_schedule(periph, CAM_PRIORITY_NORMAL);
 790         cam_periph_unlock(periph);
 791
 792         return;
 793 }
 794
 795
 796 #define PENDING_MOUNT_CHECK(softc, periph, dev)         \
 797         if (softc->open_pending_mount) {                \
 798                 error = samount(periph, 0, dev);        \
 799                 if (error) {                            \
 800                         break;                          \
 801                 }                                       \
 802                 saprevent(periph, PR_PREVENT);          \
 803                 softc->open_pending_mount = 0;          \
 804         }
 805
 806 static int
 807 saioctl(struct cdev *dev, u_long cmd, caddr_t arg, int flag, struct thread *td)
 808 {
 809         struct cam_periph *periph;
 810         struct sa_softc *softc;
 811         scsi_space_code spaceop;
 812         int didlockperiph = 0;
 813         int mode;
 814         int error = 0;
 815
 816         mode = SAMODE(dev);
 817         error = 0;              /* shut up gcc */
 818         spaceop = 0;            /* shut up gcc */
 819
 820         periph = (struct cam_periph *)dev->si_drv1;
 821         if (periph == NULL)
 822                 return (ENXIO);
 823
 824         cam_periph_lock(periph);
 825         softc = (struct sa_softc *)periph->softc;
 826
 827         /*
 828          * Check for control mode accesses. We allow MTIOCGET and
 829          * MTIOCERRSTAT (but need to be the only one open in order
 830          * to clear latched status), and MTSETBSIZE, MTSETDNSTY
 831          * and MTCOMP (but need to be the only one accessing this
 832          * device to run those).
 833          */
 834
 835         if (SA_IS_CTRL(dev)) {
 836                 switch (cmd) {
 837                 case MTIOCGETEOTMODEL:
 838                 case MTIOCGET:
 839                         break;
 840                 case MTIOCERRSTAT:
 841                         /*
 842                          * If the periph isn't already locked, lock it
 843                          * so our MTIOCERRSTAT can reset latched error stats.
 844                          *
 845                          * If the periph is already locked, skip it because
 846                          * we're just getting status and it'll be up to the
 847                          * other thread that has this device open to do
 848                          * an MTIOCERRSTAT that would clear latched status.
 849                          */
 850                         if ((periph->flags & CAM_PERIPH_LOCKED) == 0) {
 851                                 error = cam_periph_hold(periph, PRIBIO|PCATCH);
 852                                 if (error != 0) {
 853                                         cam_periph_unlock(periph);
 854                                         return (error);
 855                                 }
 856                                 didlockperiph = 1;
 857                         }
 858                         break;
 859
 860                 case MTIOCTOP:
 861                 {
 862                         struct mtop *mt = (struct mtop *) arg;
 863
 864                         /*
 865                          * Check to make sure it's an OP we can perform
 866                          * with no media inserted.
 867                          */
 868                         switch (mt->mt_op) {
 869                         case MTSETBSIZ:
 870                         case MTSETDNSTY:
 871                         case MTCOMP:
 872                                 mt = NULL;
 873                                 /* FALLTHROUGH */
 874                         default:
 875                                 break;
 876                         }
 877                         if (mt != NULL) {
 878                                 break;
 879                         }
 880                         /* FALLTHROUGH */
 881                 }
 882                 case MTIOCSETEOTMODEL:
 883                         /*
 884                          * We need to acquire the peripheral here rather
 885                          * than at open time because we are sharing writable
 886                          * access to data structures.
 887                          */
 888                         error = cam_periph_hold(periph, PRIBIO|PCATCH);
 889                         if (error != 0) {
 890                                 cam_periph_unlock(periph);
 891                                 return (error);
 892                         }
 893                         didlockperiph = 1;
 894                         break;
 895
 896                 default:
 897                         cam_periph_unlock(periph);
 898                         return (EINVAL);
 899                 }
 900         }
 901
 902         /*
 903          * Find the device that the user is talking about
 904          */
 905         switch (cmd) {
 906         case MTIOCGET:
 907         {
 908                 struct mtget *g = (struct mtget *)arg;
 909
 910                 /*
 911                  * If this isn't the control mode device, actually go out
 912                  * and ask the drive again what it's set to.
 913                  */
 914                 if (!SA_IS_CTRL(dev) && !softc->open_pending_mount) {
 915                         u_int8_t write_protect;
 916                         int comp_enabled, comp_supported;
 917                         error = sagetparams(periph, SA_PARAM_ALL,
 918                             &softc->media_blksize, &softc->media_density,
 919                             &softc->media_numblks, &softc->buffer_mode,
 920                             &write_protect, &softc->speed, &comp_supported,
 921                             &comp_enabled, &softc->comp_algorithm, NULL);
 922                         if (error)
 923                                 break;
 924                         if (write_protect)
 925                                 softc->flags |= SA_FLAG_TAPE_WP;
 926                         else
 927                                 softc->flags &= ~SA_FLAG_TAPE_WP;
 928                         softc->flags &= ~(SA_FLAG_COMP_SUPP|
 929                             SA_FLAG_COMP_ENABLED|SA_FLAG_COMP_UNSUPP);
 930                         if (comp_supported) {
 931                                 if (softc->saved_comp_algorithm == 0)
 932                                         softc->saved_comp_algorithm =
 933                                             softc->comp_algorithm;
 934                                 softc->flags |= SA_FLAG_COMP_SUPP;
 935                                 if (comp_enabled)
 936                                         softc->flags |= SA_FLAG_COMP_ENABLED;
 937                         } else
 938                                 softc->flags |= SA_FLAG_COMP_UNSUPP;
 939                 }
 940                 bzero(g, sizeof(struct mtget));
 941                 g->mt_type = MT_ISAR;
 942                 if (softc->flags & SA_FLAG_COMP_UNSUPP) {
 943                         g->mt_comp = MT_COMP_UNSUPP;
 944                         g->mt_comp0 = MT_COMP_UNSUPP;
 945                         g->mt_comp1 = MT_COMP_UNSUPP;
 946                         g->mt_comp2 = MT_COMP_UNSUPP;
 947                         g->mt_comp3 = MT_COMP_UNSUPP;
 948                 } else {
 949                         if ((softc->flags & SA_FLAG_COMP_ENABLED) == 0) {
 950                                 g->mt_comp = MT_COMP_DISABLED;
 951                         } else {
 952                                 g->mt_comp = softc->comp_algorithm;
 953                         }
 954                         g->mt_comp0 = softc->comp_algorithm;
 955                         g->mt_comp1 = softc->comp_algorithm;
 956                         g->mt_comp2 = softc->comp_algorithm;
 957                         g->mt_comp3 = softc->comp_algorithm;
 958                 }
 959                 g->mt_density = softc->media_density;
 960                 g->mt_density0 = softc->media_density;
 961                 g->mt_density1 = softc->media_density;
 962                 g->mt_density2 = softc->media_density;
 963                 g->mt_density3 = softc->media_density;
 964                 g->mt_blksiz = softc->media_blksize;
 965                 g->mt_blksiz0 = softc->media_blksize;
 966                 g->mt_blksiz1 = softc->media_blksize;
 967                 g->mt_blksiz2 = softc->media_blksize;
 968                 g->mt_blksiz3 = softc->media_blksize;
 969                 g->mt_fileno = softc->fileno;
 970                 g->mt_blkno = softc->blkno;
 971                 g->mt_dsreg = (short) softc->dsreg;
 972                 /*
 973                  * Yes, we know that this is likely to overflow
 974                  */
 975                 if (softc->last_resid_was_io) {
 976                         if ((g->mt_resid = (short) softc->last_io_resid) != 0) {
 977                                 if (SA_IS_CTRL(dev) == 0 || didlockperiph) {
 978                                         softc->last_io_resid = 0;
 979                                 }
 980                         }
 981                 } else {
 982                         if ((g->mt_resid = (short)softc->last_ctl_resid) != 0) {
 983                                 if (SA_IS_CTRL(dev) == 0 || didlockperiph) {
 984                                         softc->last_ctl_resid = 0;
 985                                 }
 986                         }
 987                 }
 988                 error = 0;
 989                 break;
 990         }
 991         case MTIOCERRSTAT:
 992         {
 993                 struct scsi_tape_errors *sep =
 994                     &((union mterrstat *)arg)->scsi_errstat;
 995
 996                 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
 997                     ("saioctl: MTIOCERRSTAT\n"));
 998
 999                 bzero(sep, sizeof(*sep));
1000                 sep->io_resid = softc->last_io_resid;
1001                 bcopy((caddr_t) &softc->last_io_sense, sep->io_sense,
1002                     sizeof (sep->io_sense));
1003                 bcopy((caddr_t) &softc->last_io_cdb, sep->io_cdb,
1004                     sizeof (sep->io_cdb));
1005                 sep->ctl_resid = softc->last_ctl_resid;
1006                 bcopy((caddr_t) &softc->last_ctl_sense, sep->ctl_sense,
1007                     sizeof (sep->ctl_sense));
1008                 bcopy((caddr_t) &softc->last_ctl_cdb, sep->ctl_cdb,
1009                     sizeof (sep->ctl_cdb));
1010
1011                 if ((SA_IS_CTRL(dev) == 0 && softc->open_pending_mount) ||
1012                     didlockperiph)
1013                         bzero((caddr_t) &softc->errinfo,
1014                             sizeof (softc->errinfo));
1015                 error = 0;
1016                 break;
1017         }
1018         case MTIOCTOP:
1019         {
1020                 struct mtop *mt;
1021                 int    count;
1022
1023                 PENDING_MOUNT_CHECK(softc, periph, dev);
1024
1025                 mt = (struct mtop *)arg;
1026
1027
1028                 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
1029                          ("saioctl: op=0x%x count=0x%x\n",
1030                           mt->mt_op, mt->mt_count));
1031
1032                 count = mt->mt_count;
1033                 switch (mt->mt_op) {
1034                 case MTWEOF:    /* write an end-of-file marker */
1035                         /*
1036                          * We don't need to clear the SA_FLAG_TAPE_WRITTEN
1037                          * flag because by keeping track of filemarks
1038                          * we have last written we know ehether or not
1039                          * we need to write more when we close the device.
1040                          */
1041                         error = sawritefilemarks(periph, count, FALSE);
1042                         break;
1043                 case MTWSS:     /* write a setmark */
1044                         error = sawritefilemarks(periph, count, TRUE);
1045                         break;
1046                 case MTBSR:     /* backward space record */
1047                 case MTFSR:     /* forward space record */
1048                 case MTBSF:     /* backward space file */
1049                 case MTFSF:     /* forward space file */
1050                 case MTBSS:     /* backward space setmark */
1051                 case MTFSS:     /* forward space setmark */
1052                 case MTEOD:     /* space to end of recorded medium */
1053                 {
1054                         int nmarks;
1055
1056                         spaceop = SS_FILEMARKS;
1057                         nmarks = softc->filemarks;
1058                         error = sacheckeod(periph);
1059                         if (error) {
1060                                 xpt_print(periph->path,
1061                                     "EOD check prior to spacing failed\n");
1062                                 softc->flags |= SA_FLAG_EIO_PENDING;
1063                                 break;
1064                         }
1065                         nmarks -= softc->filemarks;
1066                         switch(mt->mt_op) {
1067                         case MTBSR:
1068                                 count = -count;
1069                                 /* FALLTHROUGH */
1070                         case MTFSR:
1071                                 spaceop = SS_BLOCKS;
1072                                 break;
1073                         case MTBSF:
1074                                 count = -count;
1075                                 /* FALLTHROUGH */
1076                         case MTFSF:
1077                                 break;
1078                         case MTBSS:
1079                                 count = -count;
1080                                 /* FALLTHROUGH */
1081                         case MTFSS:
1082                                 spaceop = SS_SETMARKS;
1083                                 break;
1084                         case MTEOD:
1085                                 spaceop = SS_EOD;
1086                                 count = 0;
1087                                 nmarks = 0;
1088                                 break;
1089                         default:
1090                                 error = EINVAL;
1091                                 break;
1092                         }
1093                         if (error)
1094                                 break;
1095
1096                         nmarks = softc->filemarks;
1097                         /*
1098                          * XXX: Why are we checking again?
1099                          */
1100                         error = sacheckeod(periph);
1101                         if (error)
1102                                 break;
1103                         nmarks -= softc->filemarks;
1104                         error = saspace(periph, count - nmarks, spaceop);
1105                         /*
1106                          * At this point, clear that we've written the tape
1107                          * and that we've written any filemarks. We really
1108                          * don't know what the applications wishes to do next-
1109                          * the sacheckeod's will make sure we terminated the
1110                          * tape correctly if we'd been writing, but the next
1111                          * action the user application takes will set again
1112                          * whether we need to write filemarks.
1113                          */
1114                         softc->flags &=
1115                             ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
1116                         softc->filemarks = 0;
1117                         break;
1118                 }
1119                 case MTREW:     /* rewind */
1120                         PENDING_MOUNT_CHECK(softc, periph, dev);
1121                         (void) sacheckeod(periph);
1122                         error = sarewind(periph);
1123                         /* see above */
1124                         softc->flags &=
1125                             ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
1126                         softc->flags &= ~SA_FLAG_ERR_PENDING;
1127                         softc->filemarks = 0;
1128                         break;
1129                 case MTERASE:   /* erase */
1130                         PENDING_MOUNT_CHECK(softc, periph, dev);
1131                         error = saerase(periph, count);
1132                         softc->flags &=
1133                             ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
1134                         softc->flags &= ~SA_FLAG_ERR_PENDING;
1135                         break;
1136                 case MTRETENS:  /* re-tension tape */
1137                         PENDING_MOUNT_CHECK(softc, periph, dev);
1138                         error = saretension(periph);
1139                         softc->flags &=
1140                             ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
1141                         softc->flags &= ~SA_FLAG_ERR_PENDING;
1142                         break;
1143                 case MTOFFL:    /* rewind and put the drive offline */
1144
1145                         PENDING_MOUNT_CHECK(softc, periph, dev);
1146
1147                         (void) sacheckeod(periph);
1148                         /* see above */
1149                         softc->flags &= ~SA_FLAG_TAPE_WRITTEN;
1150                         softc->filemarks = 0;
1151
1152                         error = sarewind(periph);
1153                         /* clear the frozen flag anyway */
1154                         softc->flags &= ~SA_FLAG_TAPE_FROZEN;
1155
1156                         /*
1157                          * Be sure to allow media removal before ejecting.
1158                          */
1159
1160                         saprevent(periph, PR_ALLOW);
1161                         if (error == 0) {
1162                                 error = saloadunload(periph, FALSE);
1163                                 if (error == 0) {
1164                                         softc->flags &= ~SA_FLAG_TAPE_MOUNTED;
1165                                 }
1166                         }
1167                         break;
1168
1169                 case MTNOP:     /* no operation, sets status only */
1170                 case MTCACHE:   /* enable controller cache */
1171                 case MTNOCACHE: /* disable controller cache */
1172                         error = 0;
1173                         break;
1174
1175                 case MTSETBSIZ: /* Set block size for device */
1176
1177                         PENDING_MOUNT_CHECK(softc, periph, dev);
1178
1179                         error = sasetparams(periph, SA_PARAM_BLOCKSIZE, count,
1180                                             0, 0, 0);
1181                         if (error == 0) {
1182                                 softc->last_media_blksize =
1183                                     softc->media_blksize;
1184                                 softc->media_blksize = count;
1185                                 if (count) {
1186                                         softc->flags |= SA_FLAG_FIXED;
1187                                         if (powerof2(count)) {
1188                                                 softc->blk_shift =
1189                                                     ffs(count) - 1;
1190                                                 softc->blk_mask = count - 1;
1191                                         } else {
1192                                                 softc->blk_mask = ~0;
1193                                                 softc->blk_shift = 0;
1194                                         }
1195                                         /*
1196                                          * Make the user's desire 'persistent'.
1197                                          */
1198                                         softc->quirks &= ~SA_QUIRK_VARIABLE;
1199                                         softc->quirks |= SA_QUIRK_FIXED;
1200                                 } else {
1201                                         softc->flags &= ~SA_FLAG_FIXED;
1202                                         if (softc->max_blk == 0) {
1203                                                 softc->max_blk = ~0;
1204                                         }
1205                                         softc->blk_shift = 0;
1206                                         if (softc->blk_gran != 0) {
1207                                                 softc->blk_mask =
1208                                                     softc->blk_gran - 1;
1209                                         } else {
1210                                                 softc->blk_mask = 0;
1211                                         }
1212                                         /*
1213                                          * Make the user's desire 'persistent'.
1214                                          */
1215                                         softc->quirks |= SA_QUIRK_VARIABLE;
1216                                         softc->quirks &= ~SA_QUIRK_FIXED;
1217                                 }
1218                         }
1219                         break;
1220                 case MTSETDNSTY:        /* Set density for device and mode */
1221                         PENDING_MOUNT_CHECK(softc, periph, dev);
1222
1223                         if (count > UCHAR_MAX) {
1224                                 error = EINVAL;
1225                                 break;
1226                         } else {
1227                                 error = sasetparams(periph, SA_PARAM_DENSITY,
1228                                                     0, count, 0, 0);
1229                         }
1230                         break;
1231                 case MTCOMP:    /* enable compression */
1232                         PENDING_MOUNT_CHECK(softc, periph, dev);
1233                         /*
1234                          * Some devices don't support compression, and
1235                          * don't like it if you ask them for the
1236                          * compression page.
1237                          */
1238                         if ((softc->quirks & SA_QUIRK_NOCOMP) ||
1239                             (softc->flags & SA_FLAG_COMP_UNSUPP)) {
1240                                 error = ENODEV;
1241                                 break;
1242                         }
1243                         error = sasetparams(periph, SA_PARAM_COMPRESSION,
1244                             0, 0, count, SF_NO_PRINT);
1245                         break;
1246                 default:
1247                         error = EINVAL;
1248                 }
1249                 break;
1250         }
1251         case MTIOCIEOT:
1252         case MTIOCEEOT:
1253                 error = 0;
1254                 break;
1255         case MTIOCRDSPOS:
1256                 PENDING_MOUNT_CHECK(softc, periph, dev);
1257                 error = sardpos(periph, 0, (u_int32_t *) arg);
1258                 break;
1259         case MTIOCRDHPOS:
1260                 PENDING_MOUNT_CHECK(softc, periph, dev);
1261                 error = sardpos(periph, 1, (u_int32_t *) arg);
1262                 break;
1263         case MTIOCSLOCATE:
1264                 PENDING_MOUNT_CHECK(softc, periph, dev);
1265                 error = sasetpos(periph, 0, (u_int32_t *) arg);
1266                 break;
1267         case MTIOCHLOCATE:
1268                 PENDING_MOUNT_CHECK(softc, periph, dev);
1269                 error = sasetpos(periph, 1, (u_int32_t *) arg);
1270                 break;
1271         case MTIOCGETEOTMODEL:
1272                 error = 0;
1273                 if (softc->quirks & SA_QUIRK_1FM)
1274                         mode = 1;
1275                 else
1276                         mode = 2;
1277                 *((u_int32_t *) arg) = mode;
1278                 break;
1279         case MTIOCSETEOTMODEL:
1280                 error = 0;
1281                 switch (*((u_int32_t *) arg)) {
1282                 case 1:
1283                         softc->quirks &= ~SA_QUIRK_2FM;
1284                         softc->quirks |= SA_QUIRK_1FM;
1285                         break;
1286                 case 2:
1287                         softc->quirks &= ~SA_QUIRK_1FM;
1288                         softc->quirks |= SA_QUIRK_2FM;
1289                         break;
1290                 default:
1291                         error = EINVAL;
1292                         break;
1293                 }
1294                 break;
1295         default:
1296                 error = cam_periph_ioctl(periph, cmd, arg, saerror);
1297                 break;
1298         }
1299
1300         /*
1301          * Check to see if we cleared a frozen state
1302          */
1303         if (error == 0 && (softc->flags & SA_FLAG_TAPE_FROZEN)) {
1304                 switch(cmd) {
1305                 case MTIOCRDSPOS:
1306                 case MTIOCRDHPOS:
1307                 case MTIOCSLOCATE:
1308                 case MTIOCHLOCATE:
1309                         softc->fileno = (daddr_t) -1;
1310                         softc->blkno = (daddr_t) -1;
1311                         softc->flags &= ~SA_FLAG_TAPE_FROZEN;
1312                         xpt_print(periph->path,
1313                             "tape state now unfrozen.\n");
1314                         break;
1315                 default:
1316                         break;
1317                 }
1318         }
1319         if (didlockperiph) {
1320                 cam_periph_unhold(periph);
1321         }
1322         cam_periph_unlock(periph);
1323         return (error);
1324 }
1325
1326 static void
1327 sainit(void)
1328 {
1329         cam_status status;
1330
1331         /*
1332          * Install a global async callback.
1333          */
1334         status = xpt_register_async(AC_FOUND_DEVICE, saasync, NULL, NULL);
1335
1336         if (status != CAM_REQ_CMP) {
1337                 printf("sa: Failed to attach master async callback "
1338                        "due to status 0x%x!\n", status);
1339         }
1340 }
1341
1342 static void
1343 saoninvalidate(struct cam_periph *periph)
1344 {
1345         struct sa_softc *softc;
1346
1347         softc = (struct sa_softc *)periph->softc;
1348
1349         /*
1350          * De-register any async callbacks.
1351          */
1352         xpt_register_async(0, saasync, periph, periph->path);
1353
1354         softc->flags |= SA_FLAG_INVALID;
1355
1356         /*
1357          * Return all queued I/O with ENXIO.
1358          * XXX Handle any transactions queued to the card
1359          *     with XPT_ABORT_CCB.
1360          */
1361         bioq_flush(&softc->bio_queue, NULL, ENXIO);
1362         softc->queue_count = 0;
1363
1364         xpt_print(periph->path, "lost device\n");
1365
1366 }
1367
1368 static void
1369 sacleanup(struct cam_periph *periph)
1370 {
1371         struct sa_softc *softc;
1372         int i;
1373
1374         softc = (struct sa_softc *)periph->softc;
1375
1376         xpt_print(periph->path, "removing device entry\n");
1377         devstat_remove_entry(softc->device_stats);
1378         cam_periph_unlock(periph);
1379         destroy_dev(softc->devs.ctl_dev);
1380         for (i = 0; i < SA_NUM_MODES; i++) {
1381                 destroy_dev(softc->devs.mode_devs[i].r_dev);
1382                 destroy_dev(softc->devs.mode_devs[i].nr_dev);
1383                 destroy_dev(softc->devs.mode_devs[i].er_dev);
1384         }
1385         cam_periph_lock(periph);
1386         free(softc, M_SCSISA);
1387 }
1388
1389 static void
1390 saasync(void *callback_arg, u_int32_t code,
1391         struct cam_path *path, void *arg)
1392 {
1393         struct cam_periph *periph;
1394
1395         periph = (struct cam_periph *)callback_arg;
1396         switch (code) {
1397         case AC_FOUND_DEVICE:
1398         {
1399                 struct ccb_getdev *cgd;
1400                 cam_status status;
1401
1402                 cgd = (struct ccb_getdev *)arg;
1403                 if (cgd == NULL)
1404                         break;
1405
1406                 if (cgd->protocol != PROTO_SCSI)
1407                         break;
1408
1409                 if (SID_TYPE(&cgd->inq_data) != T_SEQUENTIAL)
1410                         break;
1411
1412                 /*
1413                  * Allocate a peripheral instance for
1414                  * this device and start the probe
1415                  * process.
1416                  */
1417                 status = cam_periph_alloc(saregister, saoninvalidate,
1418                                           sacleanup, sastart,
1419                                           "sa", CAM_PERIPH_BIO, cgd->ccb_h.path,
1420                                           saasync, AC_FOUND_DEVICE, cgd);
1421
1422                 if (status != CAM_REQ_CMP
1423                  && status != CAM_REQ_INPROG)
1424                         printf("saasync: Unable to probe new device "
1425                                 "due to status 0x%x\n", status);
1426                 break;
1427         }
1428         default:
1429                 cam_periph_async(periph, code, path, arg);
1430                 break;
1431         }
1432 }
1433
1434 static cam_status
1435 saregister(struct cam_periph *periph, void *arg)
1436 {
1437         struct sa_softc *softc;
1438         struct ccb_getdev *cgd;
1439         struct ccb_pathinq cpi;
1440         caddr_t match;
1441         int i;
1442
1443         cgd = (struct ccb_getdev *)arg;
1444         if (periph == NULL) {
1445                 printf("saregister: periph was NULL!!\n");
1446                 return (CAM_REQ_CMP_ERR);
1447         }
1448
1449         if (cgd == NULL) {
1450                 printf("saregister: no getdev CCB, can't register device\n");
1451                 return (CAM_REQ_CMP_ERR);
1452         }
1453
1454         softc = (struct sa_softc *)
1455             malloc(sizeof (*softc), M_SCSISA, M_NOWAIT | M_ZERO);
1456         if (softc == NULL) {
1457                 printf("saregister: Unable to probe new device. "
1458                        "Unable to allocate softc\n");
1459                 return (CAM_REQ_CMP_ERR);
1460         }
1461         softc->scsi_rev = SID_ANSI_REV(&cgd->inq_data);
1462         softc->state = SA_STATE_NORMAL;
1463         softc->fileno = (daddr_t) -1;
1464         softc->blkno = (daddr_t) -1;
1465
1466         bioq_init(&softc->bio_queue);
1467         periph->softc = softc;
1468
1469         /*
1470          * See if this device has any quirks.
1471          */
1472         match = cam_quirkmatch((caddr_t)&cgd->inq_data,
1473                                (caddr_t)sa_quirk_table,
1474                                sizeof(sa_quirk_table)/sizeof(*sa_quirk_table),
1475                                sizeof(*sa_quirk_table), scsi_inquiry_match);
1476
1477         if (match != NULL) {
1478                 softc->quirks = ((struct sa_quirk_entry *)match)->quirks;
1479                 softc->last_media_blksize =
1480                     ((struct sa_quirk_entry *)match)->prefblk;
1481 #ifdef  CAMDEBUG
1482                 xpt_print(periph->path, "found quirk entry %d\n",
1483                     (int) (((struct sa_quirk_entry *) match) - sa_quirk_table));
1484 #endif
1485         } else
1486                 softc->quirks = SA_QUIRK_NONE;
1487
1488         bzero(&cpi, sizeof(cpi));
1489         xpt_setup_ccb(&cpi.ccb_h, periph->path, CAM_PRIORITY_NORMAL);
1490         cpi.ccb_h.func_code = XPT_PATH_INQ;
1491         xpt_action((union ccb *)&cpi);
1492
1493         /*
1494          * The SA driver supports a blocksize, but we don't know the
1495          * blocksize until we media is inserted.  So, set a flag to
1496          * indicate that the blocksize is unavailable right now.
1497          */
1498         cam_periph_unlock(periph);
1499         softc->device_stats = devstat_new_entry("sa", periph->unit_number, 0,
1500             DEVSTAT_BS_UNAVAILABLE, SID_TYPE(&cgd->inq_data) |
1501             XPORT_DEVSTAT_TYPE(cpi.transport), DEVSTAT_PRIORITY_TAPE);
1502
1503         softc->devs.ctl_dev = make_dev(&sa_cdevsw, SAMINOR(SA_CTLDEV,
1504             0, SA_ATYPE_R), UID_ROOT, GID_OPERATOR,
1505             0660, "%s%d.ctl", periph->periph_name, periph->unit_number);
1506         softc->devs.ctl_dev->si_drv1 = periph;
1507
1508         for (i = 0; i < SA_NUM_MODES; i++) {
1509
1510                 softc->devs.mode_devs[i].r_dev = make_dev(&sa_cdevsw,
1511                     SAMINOR(SA_NOT_CTLDEV, i, SA_ATYPE_R),
1512                     UID_ROOT, GID_OPERATOR, 0660, "%s%d.%d",
1513                     periph->periph_name, periph->unit_number, i);
1514                 softc->devs.mode_devs[i].r_dev->si_drv1 = periph;
1515
1516                 softc->devs.mode_devs[i].nr_dev = make_dev(&sa_cdevsw,
1517                     SAMINOR(SA_NOT_CTLDEV, i, SA_ATYPE_NR),
1518                     UID_ROOT, GID_OPERATOR, 0660, "n%s%d.%d",
1519                     periph->periph_name, periph->unit_number, i);
1520                 softc->devs.mode_devs[i].nr_dev->si_drv1 = periph;
1521
1522                 softc->devs.mode_devs[i].er_dev = make_dev(&sa_cdevsw,
1523                     SAMINOR(SA_NOT_CTLDEV, i, SA_ATYPE_ER),
1524                     UID_ROOT, GID_OPERATOR, 0660, "e%s%d.%d",
1525                     periph->periph_name, periph->unit_number, i);
1526                 softc->devs.mode_devs[i].er_dev->si_drv1 = periph;
1527
1528                 /*
1529                  * Make the (well known) aliases for the first mode.
1530                  */
1531                 if (i == 0) {
1532                         struct cdev *alias;
1533
1534                         alias = make_dev_alias(softc->devs.mode_devs[i].r_dev,
1535                            "%s%d", periph->periph_name, periph->unit_number);
1536                         alias->si_drv1 = periph;
1537                         alias = make_dev_alias(softc->devs.mode_devs[i].nr_dev,
1538                             "n%s%d", periph->periph_name, periph->unit_number);
1539                         alias->si_drv1 = periph;
1540                         alias = make_dev_alias(softc->devs.mode_devs[i].er_dev,
1541                             "e%s%d", periph->periph_name, periph->unit_number);
1542                         alias->si_drv1 = periph;
1543                 }
1544         }
1545         cam_periph_lock(periph);
1546
1547         /*
1548          * Add an async callback so that we get
1549          * notified if this device goes away.
1550          */
1551         xpt_register_async(AC_LOST_DEVICE, saasync, periph, periph->path);
1552
1553         xpt_announce_periph(periph, NULL);
1554
1555         return (CAM_REQ_CMP);
1556 }
1557
1558 static void
1559 sastart(struct cam_periph *periph, union ccb *start_ccb)
1560 {
1561         struct sa_softc *softc;
1562
1563         softc = (struct sa_softc *)periph->softc;
1564
1565         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("sastart\n"));
1566
1567
1568         switch (softc->state) {
1569         case SA_STATE_NORMAL:
1570         {
1571                 /* Pull a buffer from the queue and get going on it */
1572                 struct bio *bp;
1573
1574                 /*
1575                  * See if there is a buf with work for us to do..
1576                  */
1577                 bp = bioq_first(&softc->bio_queue);
1578                 if (periph->immediate_priority <= periph->pinfo.priority) {
1579                         CAM_DEBUG_PRINT(CAM_DEBUG_SUBTRACE,
1580                                         ("queuing for immediate ccb\n"));
1581                         Set_CCB_Type(start_ccb, SA_CCB_WAITING);
1582                         SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
1583                                           periph_links.sle);
1584                         periph->immediate_priority = CAM_PRIORITY_NONE;
1585                         wakeup(&periph->ccb_list);
1586                 } else if (bp == NULL) {
1587                         xpt_release_ccb(start_ccb);
1588                 } else if ((softc->flags & SA_FLAG_ERR_PENDING) != 0) {
1589                         struct bio *done_bp;
1590 again:
1591                         softc->queue_count--;
1592                         bioq_remove(&softc->bio_queue, bp);
1593                         bp->bio_resid = bp->bio_bcount;
1594                         done_bp = bp;
1595                         if ((softc->flags & SA_FLAG_EOM_PENDING) != 0) {
1596                                 /*
1597                                  * We now just clear errors in this case
1598                                  * and let the residual be the notifier.
1599                                  */
1600                                 bp->bio_error = 0;
1601                         } else if ((softc->flags & SA_FLAG_EOF_PENDING) != 0) {
1602                                 /*
1603                                  * This can only happen if we're reading
1604                                  * in fixed length mode. In this case,
1605                                  * we dump the rest of the list the
1606                                  * same way.
1607                                  */
1608                                 bp->bio_error = 0;
1609                                 if (bioq_first(&softc->bio_queue) != NULL) {
1610                                         biodone(done_bp);
1611                                         goto again;
1612                                 }
1613                         } else if ((softc->flags & SA_FLAG_EIO_PENDING) != 0) {
1614                                 bp->bio_error = EIO;
1615                                 bp->bio_flags |= BIO_ERROR;
1616                         }
1617                         bp = bioq_first(&softc->bio_queue);
1618                         /*
1619                          * Only if we have no other buffers queued up
1620                          * do we clear the pending error flag.
1621                          */
1622                         if (bp == NULL)
1623                                 softc->flags &= ~SA_FLAG_ERR_PENDING;
1624                         CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
1625                             ("sastart- ERR_PENDING now 0x%x, bp is %sNULL, "
1626                             "%d more buffers queued up\n",
1627                             (softc->flags & SA_FLAG_ERR_PENDING),
1628                             (bp != NULL)? "not " : " ", softc->queue_count));
1629                         xpt_release_ccb(start_ccb);
1630                         biodone(done_bp);
1631                 } else {
1632                         u_int32_t length;
1633
1634                         bioq_remove(&softc->bio_queue, bp);
1635                         softc->queue_count--;
1636
1637                         if ((softc->flags & SA_FLAG_FIXED) != 0) {
1638                                 if (softc->blk_shift != 0) {
1639                                         length =
1640                                             bp->bio_bcount >> softc->blk_shift;
1641                                 } else if (softc->media_blksize != 0) {
1642                                         length = bp->bio_bcount /
1643                                             softc->media_blksize;
1644                                 } else {
1645                                         bp->bio_error = EIO;
1646                                         xpt_print(periph->path, "zero blocksize"
1647                                             " for FIXED length writes?\n");
1648                                         biodone(bp);
1649                                         break;
1650                                 }
1651 #if     0
1652                                 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_INFO,
1653                                     ("issuing a %d fixed record %s\n",
1654                                     length,  (bp->bio_cmd == BIO_READ)? "read" :
1655                                     "write"));
1656 #endif
1657                         } else {
1658                                 length = bp->bio_bcount;
1659 #if     0
1660                                 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_INFO,
1661                                     ("issuing a %d variable byte %s\n",
1662                                     length,  (bp->bio_cmd == BIO_READ)? "read" :
1663                                     "write"));
1664 #endif
1665                         }
1666                         devstat_start_transaction_bio(softc->device_stats, bp);
1667                         /*
1668                          * Some people have theorized that we should
1669                          * suppress illegal length indication if we are
1670                          * running in variable block mode so that we don't
1671                          * have to request sense every time our requested
1672                          * block size is larger than the written block.
1673                          * The residual information from the ccb allows
1674                          * us to identify this situation anyway.  The only
1675                          * problem with this is that we will not get
1676                          * information about blocks that are larger than
1677                          * our read buffer unless we set the block size
1678                          * in the mode page to something other than 0.
1679                          *
1680                          * I believe that this is a non-issue. If user apps
1681                          * don't adjust their read size to match our record
1682                          * size, that's just life. Anyway, the typical usage
1683                          * would be to issue, e.g., 64KB reads and occasionally
1684                          * have to do deal with 512 byte or 1KB intermediate
1685                          * records.
1686                          */
1687                         softc->dsreg = (bp->bio_cmd == BIO_READ)?
1688                             MTIO_DSREG_RD : MTIO_DSREG_WR;
1689                         scsi_sa_read_write(&start_ccb->csio, 0, sadone,
1690                             MSG_SIMPLE_Q_TAG, (bp->bio_cmd == BIO_READ),
1691                             FALSE, (softc->flags & SA_FLAG_FIXED) != 0,
1692                             length, bp->bio_data, bp->bio_bcount, SSD_FULL_SIZE,
1693                             IO_TIMEOUT);
1694                         start_ccb->ccb_h.ccb_pflags &= ~SA_POSITION_UPDATED;
1695                         Set_CCB_Type(start_ccb, SA_CCB_BUFFER_IO);
1696                         start_ccb->ccb_h.ccb_bp = bp;
1697                         bp = bioq_first(&softc->bio_queue);
1698                         xpt_action(start_ccb);
1699                 }
1700
1701                 if (bp != NULL) {
1702                         /* Have more work to do, so ensure we stay scheduled */
1703                         xpt_schedule(periph, CAM_PRIORITY_NORMAL);
1704                 }
1705                 break;
1706         }
1707         case SA_STATE_ABNORMAL:
1708         default:
1709                 panic("state 0x%x in sastart", softc->state);
1710                 break;
1711         }
1712 }
1713
1714
1715 static void
1716 sadone(struct cam_periph *periph, union ccb *done_ccb)
1717 {
1718         struct sa_softc *softc;
1719         struct ccb_scsiio *csio;
1720
1721         softc = (struct sa_softc *)periph->softc;
1722         csio = &done_ccb->csio;
1723         switch (CCB_Type(csio)) {
1724         case SA_CCB_BUFFER_IO:
1725         {
1726                 struct bio *bp;
1727                 int error;
1728
1729                 softc->dsreg = MTIO_DSREG_REST;
1730                 bp = (struct bio *)done_ccb->ccb_h.ccb_bp;
1731                 error = 0;
1732                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
1733                         if ((error = saerror(done_ccb, 0, 0)) == ERESTART) {
1734                                 /*
1735                                  * A retry was scheduled, so just return.
1736                                  */
1737                                 return;
1738                         }
1739                 }
1740
1741                 if (error == EIO) {
1742
1743                         /*
1744                          * Catastrophic error. Mark the tape as frozen
1745                          * (we no longer know tape position).
1746                          *
1747                          * Return all queued I/O with EIO, and unfreeze
1748                          * our queue so that future transactions that
1749                          * attempt to fix this problem can get to the
1750                          * device.
1751                          *
1752                          */
1753
1754                         softc->flags |= SA_FLAG_TAPE_FROZEN;
1755                         bioq_flush(&softc->bio_queue, NULL, EIO);
1756                 }
1757                 if (error != 0) {
1758                         bp->bio_resid = bp->bio_bcount;
1759                         bp->bio_error = error;
1760                         bp->bio_flags |= BIO_ERROR;
1761                         /*
1762                          * In the error case, position is updated in saerror.
1763                          */
1764                 } else {
1765                         bp->bio_resid = csio->resid;
1766                         bp->bio_error = 0;
1767                         if (csio->resid != 0) {
1768                                 bp->bio_flags |= BIO_ERROR;
1769                         }
1770                         if (bp->bio_cmd == BIO_WRITE) {
1771                                 softc->flags |= SA_FLAG_TAPE_WRITTEN;
1772                                 softc->filemarks = 0;
1773                         }
1774                         if (!(csio->ccb_h.ccb_pflags & SA_POSITION_UPDATED) &&
1775                             (softc->blkno != (daddr_t) -1)) {
1776                                 if ((softc->flags & SA_FLAG_FIXED) != 0) {
1777                                         u_int32_t l;
1778                                         if (softc->blk_shift != 0) {
1779                                                 l = bp->bio_bcount >>
1780                                                         softc->blk_shift;
1781                                         } else {
1782                                                 l = bp->bio_bcount /
1783                                                         softc->media_blksize;
1784                                         }
1785                                         softc->blkno += (daddr_t) l;
1786                                 } else {
1787                                         softc->blkno++;
1788                                 }
1789                         }
1790                 }
1791                 /*
1792                  * If we had an error (immediate or pending),
1793                  * release the device queue now.
1794                  */
1795                 if (error || (softc->flags & SA_FLAG_ERR_PENDING))
1796                         cam_release_devq(done_ccb->ccb_h.path, 0, 0, 0, 0);
1797 #ifdef  CAMDEBUG
1798                 if (error || bp->bio_resid) {
1799                         CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
1800                                   ("error %d resid %ld count %ld\n", error,
1801                                   bp->bio_resid, bp->bio_bcount));
1802                 }
1803 #endif
1804                 biofinish(bp, softc->device_stats, 0);
1805                 break;
1806         }
1807         case SA_CCB_WAITING:
1808         {
1809                 /* Caller will release the CCB */
1810                 wakeup(&done_ccb->ccb_h.cbfcnp);
1811                 return;
1812         }
1813         }
1814         xpt_release_ccb(done_ccb);
1815 }
1816
1817 /*
1818  * Mount the tape (make sure it's ready for I/O).
1819  */
1820 static int
1821 samount(struct cam_periph *periph, int oflags, struct cdev *dev)
1822 {
1823         struct  sa_softc *softc;
1824         union   ccb *ccb;
1825         int     error;
1826
1827         /*
1828          * oflags can be checked for 'kind' of open (read-only check) - later
1829          * dev can be checked for a control-mode or compression open - later
1830          */
1831         UNUSED_PARAMETER(oflags);
1832         UNUSED_PARAMETER(dev);
1833
1834
1835         softc = (struct sa_softc *)periph->softc;
1836
1837         /*
1838          * This should determine if something has happend since the last
1839          * open/mount that would invalidate the mount. We do *not* want
1840          * to retry this command- we just want the status. But we only
1841          * do this if we're mounted already- if we're not mounted,
1842          * we don't care about the unit read state and can instead use
1843          * this opportunity to attempt to reserve the tape unit.
1844          */
1845
1846         if (softc->flags & SA_FLAG_TAPE_MOUNTED) {
1847                 ccb = cam_periph_getccb(periph, 1);
1848                 scsi_test_unit_ready(&ccb->csio, 0, sadone,
1849                     MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT);
1850                 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1851                     softc->device_stats);
1852                 QFRLS(ccb);
1853                 if (error == ENXIO) {
1854                         softc->flags &= ~SA_FLAG_TAPE_MOUNTED;
1855                         scsi_test_unit_ready(&ccb->csio, 0, sadone,
1856                             MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT);
1857                         error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1858                             softc->device_stats);
1859                         QFRLS(ccb);
1860                 } else if (error) {
1861                         /*
1862                          * We don't need to freeze the tape because we
1863                          * will now attempt to rewind/load it.
1864                          */
1865                         softc->flags &= ~SA_FLAG_TAPE_MOUNTED;
1866                         if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
1867                                 xpt_print(periph->path,
1868                                     "error %d on TUR in samount\n", error);
1869                         }
1870                 }
1871         } else {
1872                 error = sareservereleaseunit(periph, TRUE);
1873                 if (error) {
1874                         return (error);
1875                 }
1876                 ccb = cam_periph_getccb(periph, 1);
1877                 scsi_test_unit_ready(&ccb->csio, 0, sadone,
1878                     MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT);
1879                 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1880                     softc->device_stats);
1881                 QFRLS(ccb);
1882         }
1883
1884         if ((softc->flags & SA_FLAG_TAPE_MOUNTED) == 0) {
1885                 struct scsi_read_block_limits_data *rblim = NULL;
1886                 int comp_enabled, comp_supported;
1887                 u_int8_t write_protect, guessing = 0;
1888
1889                 /*
1890                  * Clear out old state.
1891                  */
1892                 softc->flags &= ~(SA_FLAG_TAPE_WP|SA_FLAG_TAPE_WRITTEN|
1893                                   SA_FLAG_ERR_PENDING|SA_FLAG_COMP_ENABLED|
1894                                   SA_FLAG_COMP_SUPP|SA_FLAG_COMP_UNSUPP);
1895                 softc->filemarks = 0;
1896
1897                 /*
1898                  * *Very* first off, make sure we're loaded to BOT.
1899                  */
1900                 scsi_load_unload(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, FALSE,
1901                     FALSE, FALSE, 1, SSD_FULL_SIZE, REWIND_TIMEOUT);
1902                 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1903                     softc->device_stats);
1904                 QFRLS(ccb);
1905
1906                 /*
1907                  * In case this doesn't work, do a REWIND instead
1908                  */
1909                 if (error) {
1910                         scsi_rewind(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG,
1911                             FALSE, SSD_FULL_SIZE, REWIND_TIMEOUT);
1912                         error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1913                                 softc->device_stats);
1914                         QFRLS(ccb);
1915                 }
1916                 if (error) {
1917                         xpt_release_ccb(ccb);
1918                         goto exit;
1919                 }
1920
1921                 /*
1922                  * Do a dummy test read to force access to the
1923                  * media so that the drive will really know what's
1924                  * there. We actually don't really care what the
1925                  * blocksize on tape is and don't expect to really
1926                  * read a full record.
1927                  */
1928                 rblim = (struct  scsi_read_block_limits_data *)
1929                     malloc(8192, M_SCSISA, M_NOWAIT);
1930                 if (rblim == NULL) {
1931                         xpt_print(periph->path, "no memory for test read\n");
1932                         xpt_release_ccb(ccb);
1933                         error = ENOMEM;
1934                         goto exit;
1935                 }
1936
1937                 if ((softc->quirks & SA_QUIRK_NODREAD) == 0) {
1938                         scsi_sa_read_write(&ccb->csio, 0, sadone,
1939                             MSG_SIMPLE_Q_TAG, 1, FALSE, 0, 8192,
1940                             (void *) rblim, 8192, SSD_FULL_SIZE,
1941                             IO_TIMEOUT);
1942                         (void) cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1943                             softc->device_stats);
1944                         QFRLS(ccb);
1945                         scsi_rewind(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG,
1946                             FALSE, SSD_FULL_SIZE, REWIND_TIMEOUT);
1947                         error = cam_periph_runccb(ccb, saerror, CAM_RETRY_SELTO,
1948                             SF_NO_PRINT | SF_RETRY_UA,
1949                             softc->device_stats);
1950                         QFRLS(ccb);
1951                         if (error) {
1952                                 xpt_print(periph->path,
1953                                     "unable to rewind after test read\n");
1954                                 xpt_release_ccb(ccb);
1955                                 goto exit;
1956                         }
1957                 }
1958
1959                 /*
1960                  * Next off, determine block limits.
1961                  */
1962                 scsi_read_block_limits(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG,
1963                     rblim, SSD_FULL_SIZE, SCSIOP_TIMEOUT);
1964
1965                 error = cam_periph_runccb(ccb, saerror, CAM_RETRY_SELTO,
1966                     SF_NO_PRINT | SF_RETRY_UA, softc->device_stats);
1967
1968                 QFRLS(ccb);
1969                 xpt_release_ccb(ccb);
1970
1971                 if (error != 0) {
1972                         /*
1973                          * If it's less than SCSI-2, READ BLOCK LIMITS is not
1974                          * a MANDATORY command. Anyway- it doesn't matter-
1975                          * we can proceed anyway.
1976                          */
1977                         softc->blk_gran = 0;
1978                         softc->max_blk = ~0;
1979                         softc->min_blk = 0;
1980                 } else {
1981                         if (softc->scsi_rev >= SCSI_REV_SPC) {
1982                                 softc->blk_gran = RBL_GRAN(rblim);
1983                         } else {
1984                                 softc->blk_gran = 0;
1985                         }
1986                         /*
1987                          * We take max_blk == min_blk to mean a default to
1988                          * fixed mode- but note that whatever we get out of
1989                          * sagetparams below will actually determine whether
1990                          * we are actually *in* fixed mode.
1991                          */
1992                         softc->max_blk = scsi_3btoul(rblim->maximum);
1993                         softc->min_blk = scsi_2btoul(rblim->minimum);
1994
1995
1996                 }
1997                 /*
1998                  * Next, perform a mode sense to determine
1999                  * current density, blocksize, compression etc.
2000                  */
2001                 error = sagetparams(periph, SA_PARAM_ALL,
2002                                     &softc->media_blksize,
2003                                     &softc->media_density,
2004                                     &softc->media_numblks,
2005                                     &softc->buffer_mode, &write_protect,
2006                                     &softc->speed, &comp_supported,
2007                                     &comp_enabled, &softc->comp_algorithm,
2008                                     NULL);
2009
2010                 if (error != 0) {
2011                         /*
2012                          * We could work a little harder here. We could
2013                          * adjust our attempts to get information. It
2014                          * might be an ancient tape drive. If someone
2015                          * nudges us, we'll do that.
2016                          */
2017                         goto exit;
2018                 }
2019
2020                 /*
2021                  * If no quirk has determined that this is a device that is
2022                  * preferred to be in fixed or variable mode, now is the time
2023                  * to find out.
2024                  */
2025                 if ((softc->quirks & (SA_QUIRK_FIXED|SA_QUIRK_VARIABLE)) == 0) {
2026                         guessing = 1;
2027                         /*
2028                          * This could be expensive to find out. Luckily we
2029                          * only need to do this once. If we start out in
2030                          * 'default' mode, try and set ourselves to one
2031                          * of the densities that would determine a wad
2032                          * of other stuff. Go from highest to lowest.
2033                          */
2034                         if (softc->media_density == SCSI_DEFAULT_DENSITY) {
2035                                 int i;
2036                                 static u_int8_t ctry[] = {
2037                                         SCSI_DENSITY_HALFINCH_PE,
2038                                         SCSI_DENSITY_HALFINCH_6250C,
2039                                         SCSI_DENSITY_HALFINCH_6250,
2040                                         SCSI_DENSITY_HALFINCH_1600,
2041                                         SCSI_DENSITY_HALFINCH_800,
2042                                         SCSI_DENSITY_QIC_4GB,
2043                                         SCSI_DENSITY_QIC_2GB,
2044                                         SCSI_DENSITY_QIC_525_320,
2045                                         SCSI_DENSITY_QIC_150,
2046                                         SCSI_DENSITY_QIC_120,
2047                                         SCSI_DENSITY_QIC_24,
2048                                         SCSI_DENSITY_QIC_11_9TRK,
2049                                         SCSI_DENSITY_QIC_11_4TRK,
2050                                         SCSI_DENSITY_QIC_1320,
2051                                         SCSI_DENSITY_QIC_3080,
2052                                         0
2053                                 };
2054                                 for (i = 0; ctry[i]; i++) {
2055                                         error = sasetparams(periph,
2056                                             SA_PARAM_DENSITY, 0, ctry[i],
2057                                             0, SF_NO_PRINT);
2058                                         if (error == 0) {
2059                                                 softc->media_density = ctry[i];
2060                                                 break;
2061                                         }
2062                                 }
2063                         }
2064                         switch (softc->media_density) {
2065                         case SCSI_DENSITY_QIC_11_4TRK:
2066                         case SCSI_DENSITY_QIC_11_9TRK:
2067                         case SCSI_DENSITY_QIC_24:
2068                         case SCSI_DENSITY_QIC_120:
2069                         case SCSI_DENSITY_QIC_150:
2070                         case SCSI_DENSITY_QIC_525_320:
2071                         case SCSI_DENSITY_QIC_1320:
2072                         case SCSI_DENSITY_QIC_3080:
2073                                 softc->quirks &= ~SA_QUIRK_2FM;
2074                                 softc->quirks |= SA_QUIRK_FIXED|SA_QUIRK_1FM;
2075                                 softc->last_media_blksize = 512;
2076                                 break;
2077                         case SCSI_DENSITY_QIC_4GB:
2078                         case SCSI_DENSITY_QIC_2GB:
2079                                 softc->quirks &= ~SA_QUIRK_2FM;
2080                                 softc->quirks |= SA_QUIRK_FIXED|SA_QUIRK_1FM;
2081                                 softc->last_media_blksize = 1024;
2082                                 break;
2083                         default:
2084                                 softc->last_media_blksize =
2085                                     softc->media_blksize;
2086                                 softc->quirks |= SA_QUIRK_VARIABLE;
2087                                 break;
2088                         }
2089                 }
2090
2091                 /*
2092                  * If no quirk has determined that this is a device that needs
2093                  * to have 2 Filemarks at EOD, now is the time to find out.
2094                  */
2095
2096                 if ((softc->quirks & SA_QUIRK_2FM) == 0) {
2097                         switch (softc->media_density) {
2098                         case SCSI_DENSITY_HALFINCH_800:
2099                         case SCSI_DENSITY_HALFINCH_1600:
2100                         case SCSI_DENSITY_HALFINCH_6250:
2101                         case SCSI_DENSITY_HALFINCH_6250C:
2102                         case SCSI_DENSITY_HALFINCH_PE:
2103                                 softc->quirks &= ~SA_QUIRK_1FM;
2104                                 softc->quirks |= SA_QUIRK_2FM;
2105                                 break;
2106                         default:
2107                                 break;
2108                         }
2109                 }
2110
2111                 /*
2112                  * Now validate that some info we got makes sense.
2113                  */
2114                 if ((softc->max_blk < softc->media_blksize) ||
2115                     (softc->min_blk > softc->media_blksize &&
2116                     softc->media_blksize)) {
2117                         xpt_print(periph->path,
2118                             "BLOCK LIMITS (%d..%d) could not match current "
2119                             "block settings (%d)- adjusting\n", softc->min_blk,
2120                             softc->max_blk, softc->media_blksize);
2121                         softc->max_blk = softc->min_blk =
2122                             softc->media_blksize;
2123                 }
2124
2125                 /*
2126                  * Now put ourselves into the right frame of mind based
2127                  * upon quirks...
2128                  */
2129 tryagain:
2130                 /*
2131                  * If we want to be in FIXED mode and our current blocksize
2132                  * is not equal to our last blocksize (if nonzero), try and
2133                  * set ourselves to this last blocksize (as the 'preferred'
2134                  * block size).  The initial quirkmatch at registry sets the
2135                  * initial 'last' blocksize. If, for whatever reason, this
2136                  * 'last' blocksize is zero, set the blocksize to 512,
2137                  * or min_blk if that's larger.
2138                  */
2139                 if ((softc->quirks & SA_QUIRK_FIXED) &&
2140                     (softc->quirks & SA_QUIRK_NO_MODESEL) == 0 &&
2141                     (softc->media_blksize != softc->last_media_blksize)) {
2142                         softc->media_blksize = softc->last_media_blksize;
2143                         if (softc->media_blksize == 0) {
2144                                 softc->media_blksize = 512;
2145                                 if (softc->media_blksize < softc->min_blk) {
2146                                         softc->media_blksize = softc->min_blk;
2147                                 }
2148                         }
2149                         error = sasetparams(periph, SA_PARAM_BLOCKSIZE,
2150                             softc->media_blksize, 0, 0, SF_NO_PRINT);
2151                         if (error) {
2152                                 xpt_print(periph->path,
2153                                     "unable to set fixed blocksize to %d\n",
2154                                     softc->media_blksize);
2155                                 goto exit;
2156                         }
2157                 }
2158
2159                 if ((softc->quirks & SA_QUIRK_VARIABLE) &&
2160                     (softc->media_blksize != 0)) {
2161                         softc->last_media_blksize = softc->media_blksize;
2162                         softc->media_blksize = 0;
2163                         error = sasetparams(periph, SA_PARAM_BLOCKSIZE,
2164                             0, 0, 0, SF_NO_PRINT);
2165                         if (error) {
2166                                 /*
2167                                  * If this fails and we were guessing, just
2168                                  * assume that we got it wrong and go try
2169                                  * fixed block mode. Don't even check against
2170                                  * density code at this point.
2171                                  */
2172                                 if (guessing) {
2173                                         softc->quirks &= ~SA_QUIRK_VARIABLE;
2174                                         softc->quirks |= SA_QUIRK_FIXED;
2175                                         if (softc->last_media_blksize == 0)
2176                                                 softc->last_media_blksize = 512;
2177                                         goto tryagain;
2178                                 }
2179                                 xpt_print(periph->path,
2180                                     "unable to set variable blocksize\n");
2181                                 goto exit;
2182                         }
2183                 }
2184
2185                 /*
2186                  * Now that we have the current block size,
2187                  * set up some parameters for sastart's usage.
2188                  */
2189                 if (softc->media_blksize) {
2190                         softc->flags |= SA_FLAG_FIXED;
2191                         if (powerof2(softc->media_blksize)) {
2192                                 softc->blk_shift =
2193                                     ffs(softc->media_blksize) - 1;
2194                                 softc->blk_mask = softc->media_blksize - 1;
2195                         } else {
2196                                 softc->blk_mask = ~0;
2197                                 softc->blk_shift = 0;
2198                         }
2199                 } else {
2200                         /*
2201                          * The SCSI-3 spec allows 0 to mean "unspecified".
2202                          * The SCSI-1 spec allows 0 to mean 'infinite'.
2203                          *
2204                          * Either works here.
2205                          */
2206                         if (softc->max_blk == 0) {
2207                                 softc->max_blk = ~0;
2208                         }
2209                         softc->blk_shift = 0;
2210                         if (softc->blk_gran != 0) {
2211                                 softc->blk_mask = softc->blk_gran - 1;
2212                         } else {
2213                                 softc->blk_mask = 0;
2214                         }
2215                 }
2216
2217                 if (write_protect)
2218                         softc->flags |= SA_FLAG_TAPE_WP;
2219
2220                 if (comp_supported) {
2221                         if (softc->saved_comp_algorithm == 0)
2222                                 softc->saved_comp_algorithm =
2223                                     softc->comp_algorithm;
2224                         softc->flags |= SA_FLAG_COMP_SUPP;
2225                         if (comp_enabled)
2226                                 softc->flags |= SA_FLAG_COMP_ENABLED;
2227                 } else
2228                         softc->flags |= SA_FLAG_COMP_UNSUPP;
2229
2230                 if ((softc->buffer_mode == SMH_SA_BUF_MODE_NOBUF) &&
2231                     (softc->quirks & SA_QUIRK_NO_MODESEL) == 0) {
2232                         error = sasetparams(periph, SA_PARAM_BUFF_MODE, 0,
2233                             0, 0, SF_NO_PRINT);
2234                         if (error == 0) {
2235                                 softc->buffer_mode = SMH_SA_BUF_MODE_SIBUF;
2236                         } else {
2237                                 xpt_print(periph->path,
2238                                     "unable to set buffered mode\n");
2239                         }
2240                         error = 0;      /* not an error */
2241                 }
2242
2243
2244                 if (error == 0) {
2245                         softc->flags |= SA_FLAG_TAPE_MOUNTED;
2246                 }
2247 exit:
2248                 if (rblim != NULL)
2249                         free(rblim, M_SCSISA);
2250
2251                 if (error != 0) {
2252                         softc->dsreg = MTIO_DSREG_NIL;
2253                 } else {
2254                         softc->fileno = softc->blkno = 0;
2255                         softc->dsreg = MTIO_DSREG_REST;
2256                 }
2257 #ifdef  SA_1FM_AT_EOD
2258                 if ((softc->quirks & SA_QUIRK_2FM) == 0)
2259                         softc->quirks |= SA_QUIRK_1FM;
2260 #else
2261                 if ((softc->quirks & SA_QUIRK_1FM) == 0)
2262                         softc->quirks |= SA_QUIRK_2FM;
2263 #endif
2264         } else
2265                 xpt_release_ccb(ccb);
2266
2267         /*
2268          * If we return an error, we're not mounted any more,
2269          * so release any device reservation.
2270          */
2271         if (error != 0) {
2272                 (void) sareservereleaseunit(periph, FALSE);
2273         } else {
2274                 /*
2275                  * Clear I/O residual.
2276                  */
2277                 softc->last_io_resid = 0;
2278                 softc->last_ctl_resid = 0;
2279         }
2280         return (error);
2281 }
2282
2283 /*
2284  * How many filemarks do we need to write if we were to terminate the
2285  * tape session right now? Note that this can be a negative number
2286  */
2287
2288 static int
2289 samarkswanted(struct cam_periph *periph)
2290 {
2291         int     markswanted;
2292         struct  sa_softc *softc;
2293
2294         softc = (struct sa_softc *)periph->softc;
2295         markswanted = 0;
2296         if ((softc->flags & SA_FLAG_TAPE_WRITTEN) != 0) {
2297                 markswanted++;
2298                 if (softc->quirks & SA_QUIRK_2FM)
2299                         markswanted++;
2300         }
2301         markswanted -= softc->filemarks;
2302         return (markswanted);
2303 }
2304
2305 static int
2306 sacheckeod(struct cam_periph *periph)
2307 {
2308         int     error;
2309         int     markswanted;
2310
2311         markswanted = samarkswanted(periph);
2312
2313         if (markswanted > 0) {
2314                 error = sawritefilemarks(periph, markswanted, FALSE);
2315         } else {
2316                 error = 0;
2317         }
2318         return (error);
2319 }
2320
2321 static int
2322 saerror(union ccb *ccb, u_int32_t cflgs, u_int32_t sflgs)
2323 {
2324         static const char *toobig =
2325             "%d-byte tape record bigger than supplied buffer\n";
2326         struct  cam_periph *periph;
2327         struct  sa_softc *softc;
2328         struct  ccb_scsiio *csio;
2329         struct  scsi_sense_data *sense;
2330         uint64_t resid = 0;
2331         int64_t info = 0;
2332         cam_status status;
2333         int error_code, sense_key, asc, ascq, error, aqvalid, stream_valid;
2334         int sense_len;
2335         uint8_t stream_bits;
2336
2337         periph = xpt_path_periph(ccb->ccb_h.path);
2338         softc = (struct sa_softc *)periph->softc;
2339         csio = &ccb->csio;
2340         sense = &csio->sense_data;
2341         sense_len = csio->sense_len - csio->sense_resid;
2342         scsi_extract_sense_len(sense, sense_len, &error_code, &sense_key,
2343             &asc, &ascq, /*show_errors*/ 1);
2344         if (asc != -1 && ascq != -1)
2345                 aqvalid = 1;
2346         else
2347                 aqvalid = 0;
2348         if (scsi_get_stream_info(sense, sense_len, NULL, &stream_bits) == 0)
2349                 stream_valid = 1;
2350         else
2351                 stream_valid = 0;
2352         error = 0;
2353
2354         status = csio->ccb_h.status & CAM_STATUS_MASK;
2355
2356         /*
2357          * Calculate/latch up, any residuals... We do this in a funny 2-step
2358          * so we can print stuff here if we have CAM_DEBUG enabled for this
2359          * unit.
2360          */
2361         if (status == CAM_SCSI_STATUS_ERROR) {
2362                 if (scsi_get_sense_info(sense, sense_len, SSD_DESC_INFO, &resid,
2363                                         &info) == 0) {
2364                         if ((softc->flags & SA_FLAG_FIXED) != 0)
2365                                 resid *= softc->media_blksize;
2366                 } else {
2367                         resid = csio->dxfer_len;
2368                         info = resid;
2369                         if ((softc->flags & SA_FLAG_FIXED) != 0) {
2370                                 if (softc->media_blksize)
2371                                         info /= softc->media_blksize;
2372                         }
2373                 }
2374                 if (CCB_Type(csio) == SA_CCB_BUFFER_IO) {
2375                         bcopy((caddr_t) sense, (caddr_t) &softc->last_io_sense,
2376                             sizeof (struct scsi_sense_data));
2377                         bcopy(csio->cdb_io.cdb_bytes, softc->last_io_cdb,
2378                             (int) csio->cdb_len);
2379                         softc->last_io_resid = resid;
2380                         softc->last_resid_was_io = 1;
2381                 } else {
2382                         bcopy((caddr_t) sense, (caddr_t) &softc->last_ctl_sense,
2383                             sizeof (struct scsi_sense_data));
2384                         bcopy(csio->cdb_io.cdb_bytes, softc->last_ctl_cdb,
2385                             (int) csio->cdb_len);
2386                         softc->last_ctl_resid = resid;
2387                         softc->last_resid_was_io = 0;
2388                 }
2389                 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, ("CDB[0]=0x%x Key 0x%x "
2390                     "ASC/ASCQ 0x%x/0x%x CAM STATUS 0x%x flags 0x%x resid %jd "
2391                     "dxfer_len %d\n", csio->cdb_io.cdb_bytes[0] & 0xff,
2392                     sense_key, asc, ascq, status,
2393                     (stream_valid) ? stream_bits : 0, (intmax_t)resid,
2394                     csio->dxfer_len));
2395         } else {
2396                 CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
2397                     ("Cam Status 0x%x\n", status));
2398         }
2399
2400         switch (status) {
2401         case CAM_REQ_CMP:
2402                 return (0);
2403         case CAM_SCSI_STATUS_ERROR:
2404                 /*
2405                  * If a read/write command, we handle it here.
2406                  */
2407                 if (CCB_Type(csio) != SA_CCB_WAITING) {
2408                         break;
2409                 }
2410                 /*
2411                  * If this was just EOM/EOP, Filemark, Setmark or ILI detected
2412                  * on a non read/write command, we assume it's not an error
2413                  * and propagate the residule and return.
2414                  */
2415                 if ((aqvalid && asc == 0 && ascq > 0 && ascq <= 5) ||
2416                     (aqvalid == 0 && sense_key == SSD_KEY_NO_SENSE)) {
2417                         csio->resid = resid;
2418                         QFRLS(ccb);
2419                         return (0);
2420                 }
2421                 /*
2422                  * Otherwise, we let the common code handle this.
2423                  */
2424                 return (cam_periph_error(ccb, cflgs, sflgs, &softc->saved_ccb));
2425
2426         /*
2427          * XXX: To Be Fixed
2428          * We cannot depend upon CAM honoring retry counts for these.
2429          */
2430         case CAM_SCSI_BUS_RESET:
2431         case CAM_BDR_SENT:
2432                 if (ccb->ccb_h.retry_count <= 0) {
2433                         return (EIO);
2434                 }
2435                 /* FALLTHROUGH */
2436         default:
2437                 return (cam_periph_error(ccb, cflgs, sflgs, &softc->saved_ccb));
2438         }
2439
2440         /*
2441          * Handle filemark, end of tape, mismatched record sizes....
2442          * From this point out, we're only handling read/write cases.
2443          * Handle writes && reads differently.
2444          */
2445
2446         if (csio->cdb_io.cdb_bytes[0] == SA_WRITE) {
2447                 if (sense_key == SSD_KEY_VOLUME_OVERFLOW) {
2448                         csio->resid = resid;
2449                         error = ENOSPC;
2450                 } else if ((stream_valid != 0) && (stream_bits & SSD_EOM)) {
2451                         softc->flags |= SA_FLAG_EOM_PENDING;
2452                         /*
2453                          * Grotesque as it seems, the few times
2454                          * I've actually seen a non-zero resid,
2455                          * the tape drive actually lied and had
2456                          * written all the data!.
2457                          */
2458                         csio->resid = 0;
2459                 }
2460         } else {
2461                 csio->resid = resid;
2462                 if (sense_key == SSD_KEY_BLANK_CHECK) {
2463                         if (softc->quirks & SA_QUIRK_1FM) {
2464                                 error = 0;
2465                                 softc->flags |= SA_FLAG_EOM_PENDING;
2466                         } else {
2467                                 error = EIO;
2468                         }
2469                 } else if ((stream_valid != 0) && (stream_bits & SSD_FILEMARK)){
2470                         if (softc->flags & SA_FLAG_FIXED) {
2471                                 error = -1;
2472                                 softc->flags |= SA_FLAG_EOF_PENDING;
2473                         }
2474                         /*
2475                          * Unconditionally, if we detected a filemark on a read,
2476                          * mark that we've run moved a file ahead.
2477                          */
2478                         if (softc->fileno != (daddr_t) -1) {
2479                                 softc->fileno++;
2480                                 softc->blkno = 0;
2481                                 csio->ccb_h.ccb_pflags |= SA_POSITION_UPDATED;
2482                         }
2483                 }
2484         }
2485
2486         /*
2487          * Incorrect Length usually applies to read, but can apply to writes.
2488          */
2489         if (error == 0 && (stream_valid != 0) && (stream_bits & SSD_ILI)) {
2490                 if (info < 0) {
2491                         xpt_print(csio->ccb_h.path, toobig,
2492                             csio->dxfer_len - info);
2493                         csio->resid = csio->dxfer_len;
2494                         error = EIO;
2495                 } else {
2496                         csio->resid = resid;
2497                         if (softc->flags & SA_FLAG_FIXED) {
2498                                 softc->flags |= SA_FLAG_EIO_PENDING;
2499                         }
2500                         /*
2501                          * Bump the block number if we hadn't seen a filemark.
2502                          * Do this independent of errors (we've moved anyway).
2503                          */
2504                         if ((stream_valid == 0) ||
2505                             (stream_bits & SSD_FILEMARK) == 0) {
2506                                 if (softc->blkno != (daddr_t) -1) {
2507                                         softc->blkno++;
2508                                         csio->ccb_h.ccb_pflags |=
2509                                            SA_POSITION_UPDATED;
2510                                 }
2511                         }
2512                 }
2513         }
2514
2515         if (error <= 0) {
2516                 /*
2517                  * Unfreeze the queue if frozen as we're not returning anything
2518                  * to our waiters that would indicate an I/O error has occurred
2519                  * (yet).
2520                  */
2521                 QFRLS(ccb);
2522                 error = 0;
2523         }
2524         return (error);
2525 }
2526
2527 static int
2528 sagetparams(struct cam_periph *periph, sa_params params_to_get,
2529             u_int32_t *blocksize, u_int8_t *density, u_int32_t *numblocks,
2530             int *buff_mode, u_int8_t *write_protect, u_int8_t *speed,
2531             int *comp_supported, int *comp_enabled, u_int32_t *comp_algorithm,
2532             sa_comp_t *tcs)
2533 {
2534         union ccb *ccb;
2535         void *mode_buffer;
2536         struct scsi_mode_header_6 *mode_hdr;
2537         struct scsi_mode_blk_desc *mode_blk;
2538         int mode_buffer_len;
2539         struct sa_softc *softc;
2540         u_int8_t cpage;
2541         int error;
2542         cam_status status;
2543
2544         softc = (struct sa_softc *)periph->softc;
2545         ccb = cam_periph_getccb(periph, 1);
2546         if (softc->quirks & SA_QUIRK_NO_CPAGE)
2547                 cpage = SA_DEVICE_CONFIGURATION_PAGE;
2548         else
2549                 cpage = SA_DATA_COMPRESSION_PAGE;
2550
2551 retry:
2552         mode_buffer_len = sizeof(*mode_hdr) + sizeof(*mode_blk);
2553
2554         if (params_to_get & SA_PARAM_COMPRESSION) {
2555                 if (softc->quirks & SA_QUIRK_NOCOMP) {
2556                         *comp_supported = FALSE;
2557                         params_to_get &= ~SA_PARAM_COMPRESSION;
2558                 } else
2559                         mode_buffer_len += sizeof (sa_comp_t);
2560         }
2561
2562         /* XXX Fix M_NOWAIT */
2563         mode_buffer = malloc(mode_buffer_len, M_SCSISA, M_NOWAIT | M_ZERO);
2564         if (mode_buffer == NULL) {
2565                 xpt_release_ccb(ccb);
2566                 return (ENOMEM);
2567         }
2568         mode_hdr = (struct scsi_mode_header_6 *)mode_buffer;
2569         mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1];
2570
2571         /* it is safe to retry this */
2572         scsi_mode_sense(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, FALSE,
2573             SMS_PAGE_CTRL_CURRENT, (params_to_get & SA_PARAM_COMPRESSION) ?
2574             cpage : SMS_VENDOR_SPECIFIC_PAGE, mode_buffer, mode_buffer_len,
2575             SSD_FULL_SIZE, SCSIOP_TIMEOUT);
2576
2577         error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
2578             softc->device_stats);
2579         QFRLS(ccb);
2580
2581         status = ccb->ccb_h.status & CAM_STATUS_MASK;
2582
2583         if (error == EINVAL && (params_to_get & SA_PARAM_COMPRESSION) != 0) {
2584                 /*
2585                  * Hmm. Let's see if we can try another page...
2586                  * If we've already done that, give up on compression
2587                  * for this device and remember this for the future
2588                  * and attempt the request without asking for compression
2589                  * info.
2590                  */
2591                 if (cpage == SA_DATA_COMPRESSION_PAGE) {
2592                         cpage = SA_DEVICE_CONFIGURATION_PAGE;
2593                         goto retry;
2594                 }
2595                 softc->quirks |= SA_QUIRK_NOCOMP;
2596                 free(mode_buffer, M_SCSISA);
2597                 goto retry;
2598         } else if (status == CAM_SCSI_STATUS_ERROR) {
2599                 /* Tell the user about the fatal error. */
2600                 scsi_sense_print(&ccb->csio);
2601                 goto sagetparamsexit;
2602         }
2603
2604         /*
2605          * If the user only wants the compression information, and
2606          * the device doesn't send back the block descriptor, it's
2607          * no big deal.  If the user wants more than just
2608          * compression, though, and the device doesn't pass back the
2609          * block descriptor, we need to send another mode sense to
2610          * get the block descriptor.
2611          */
2612         if ((mode_hdr->blk_desc_len == 0) &&
2613             (params_to_get & SA_PARAM_COMPRESSION) &&
2614             (params_to_get & ~(SA_PARAM_COMPRESSION))) {
2615
2616                 /*
2617                  * Decrease the mode buffer length by the size of
2618                  * the compression page, to make sure the data
2619                  * there doesn't get overwritten.
2620                  */
2621                 mode_buffer_len -= sizeof (sa_comp_t);
2622
2623                 /*
2624                  * Now move the compression page that we presumably
2625                  * got back down the memory chunk a little bit so
2626                  * it doesn't get spammed.
2627                  */
2628                 bcopy(&mode_hdr[0], &mode_hdr[1], sizeof (sa_comp_t));
2629                 bzero(&mode_hdr[0], sizeof (mode_hdr[0]));
2630
2631                 /*
2632                  * Now, we issue another mode sense and just ask
2633                  * for the block descriptor, etc.
2634                  */
2635
2636                 scsi_mode_sense(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, FALSE,
2637                     SMS_PAGE_CTRL_CURRENT, SMS_VENDOR_SPECIFIC_PAGE,
2638                     mode_buffer, mode_buffer_len, SSD_FULL_SIZE,
2639                     SCSIOP_TIMEOUT);
2640
2641                 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
2642                     softc->device_stats);
2643                 QFRLS(ccb);
2644
2645                 if (error != 0)
2646                         goto sagetparamsexit;
2647         }
2648
2649         if (params_to_get & SA_PARAM_BLOCKSIZE)
2650                 *blocksize = scsi_3btoul(mode_blk->blklen);
2651
2652         if (params_to_get & SA_PARAM_NUMBLOCKS)
2653                 *numblocks = scsi_3btoul(mode_blk->nblocks);
2654
2655         if (params_to_get & SA_PARAM_BUFF_MODE)
2656                 *buff_mode = mode_hdr->dev_spec & SMH_SA_BUF_MODE_MASK;
2657
2658         if (params_to_get & SA_PARAM_DENSITY)
2659                 *density = mode_blk->density;
2660
2661         if (params_to_get & SA_PARAM_WP)
2662                 *write_protect = (mode_hdr->dev_spec & SMH_SA_WP)? TRUE : FALSE;
2663
2664         if (params_to_get & SA_PARAM_SPEED)
2665                 *speed = mode_hdr->dev_spec & SMH_SA_SPEED_MASK;
2666
2667         if (params_to_get & SA_PARAM_COMPRESSION) {
2668                 sa_comp_t *ntcs = (sa_comp_t *) &mode_blk[1];
2669                 if (cpage == SA_DATA_COMPRESSION_PAGE) {
2670                         struct scsi_data_compression_page *cp = &ntcs->dcomp;
2671                         *comp_supported =
2672                             (cp->dce_and_dcc & SA_DCP_DCC)? TRUE : FALSE;
2673                         *comp_enabled =
2674                             (cp->dce_and_dcc & SA_DCP_DCE)? TRUE : FALSE;
2675                         *comp_algorithm = scsi_4btoul(cp->comp_algorithm);
2676                 } else {
2677                         struct scsi_dev_conf_page *cp = &ntcs->dconf;
2678                         /*
2679                          * We don't really know whether this device supports
2680                          * Data Compression if the algorithm field is
2681                          * zero. Just say we do.
2682                          */
2683                         *comp_supported = TRUE;
2684                         *comp_enabled =
2685                             (cp->sel_comp_alg != SA_COMP_NONE)? TRUE : FALSE;
2686                         *comp_algorithm = cp->sel_comp_alg;
2687                 }
2688                 if (tcs != NULL)
2689                         bcopy(ntcs, tcs, sizeof (sa_comp_t));
2690         }
2691
2692         if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
2693                 int idx;
2694                 char *xyz = mode_buffer;
2695                 xpt_print_path(periph->path);
2696                 printf("Mode Sense Data=");
2697                 for (idx = 0; idx < mode_buffer_len; idx++)
2698                         printf(" 0x%02x", xyz[idx] & 0xff);
2699                 printf("\n");
2700         }
2701
2702 sagetparamsexit:
2703
2704         xpt_release_ccb(ccb);
2705         free(mode_buffer, M_SCSISA);
2706         return (error);
2707 }
2708
2709 /*
2710  * The purpose of this function is to set one of four different parameters
2711  * for a tape drive:
2712  *      - blocksize
2713  *      - density
2714  *      - compression / compression algorithm
2715  *      - buffering mode
2716  *
2717  * The assumption is that this will be called from saioctl(), and therefore
2718  * from a process context.  Thus the waiting malloc calls below.  If that
2719  * assumption ever changes, the malloc calls should be changed to be
2720  * NOWAIT mallocs.
2721  *
2722  * Any or all of the four parameters may be set when this function is
2723  * called.  It should handle setting more than one parameter at once.
2724  */
2725 static int
2726 sasetparams(struct cam_periph *periph, sa_params params_to_set,
2727             u_int32_t blocksize, u_int8_t density, u_int32_t calg,
2728             u_int32_t sense_flags)
2729 {
2730         struct sa_softc *softc;
2731         u_int32_t current_blocksize;
2732         u_int32_t current_calg;
2733         u_int8_t current_density;
2734         u_int8_t current_speed;
2735         int comp_enabled, comp_supported;
2736         void *mode_buffer;
2737         int mode_buffer_len;
2738         struct scsi_mode_header_6 *mode_hdr;
2739         struct scsi_mode_blk_desc *mode_blk;
2740         sa_comp_t *ccomp, *cpage;
2741         int buff_mode;
2742         union ccb *ccb = NULL;
2743         int error;
2744
2745         softc = (struct sa_softc *)periph->softc;
2746
2747         ccomp = malloc(sizeof (sa_comp_t), M_SCSISA, M_NOWAIT);
2748         if (ccomp == NULL)
2749                 return (ENOMEM);
2750
2751         /*
2752          * Since it doesn't make sense to set the number of blocks, or
2753          * write protection, we won't try to get the current value.  We
2754          * always want to get the blocksize, so we can set it back to the
2755          * proper value.
2756          */
2757         error = sagetparams(periph,
2758             params_to_set | SA_PARAM_BLOCKSIZE | SA_PARAM_SPEED,
2759             &current_blocksize, &current_density, NULL, &buff_mode, NULL,
2760             &current_speed, &comp_supported, &comp_enabled,
2761             &current_calg, ccomp);
2762
2763         if (error != 0) {
2764                 free(ccomp, M_SCSISA);
2765                 return (error);
2766         }
2767
2768         mode_buffer_len = sizeof(*mode_hdr) + sizeof(*mode_blk);
2769         if (params_to_set & SA_PARAM_COMPRESSION)
2770                 mode_buffer_len += sizeof (sa_comp_t);
2771
2772         mode_buffer = malloc(mode_buffer_len, M_SCSISA, M_NOWAIT | M_ZERO);
2773         if (mode_buffer == NULL) {
2774                 free(ccomp, M_SCSISA);
2775                 return (ENOMEM);
2776         }
2777
2778         mode_hdr = (struct scsi_mode_header_6 *)mode_buffer;
2779         mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1];
2780
2781         ccb = cam_periph_getccb(periph, 1);
2782
2783 retry:
2784
2785         if (params_to_set & SA_PARAM_COMPRESSION) {
2786                 if (mode_blk) {
2787                         cpage = (sa_comp_t *)&mode_blk[1];
2788                 } else {
2789                         cpage = (sa_comp_t *)&mode_hdr[1];
2790                 }
2791                 bcopy(ccomp, cpage, sizeof (sa_comp_t));
2792                 cpage->hdr.pagecode &= ~0x80;
2793         } else
2794                 cpage = NULL;
2795
2796         /*
2797          * If the caller wants us to set the blocksize, use the one they
2798          * pass in.  Otherwise, use the blocksize we got back from the
2799          * mode select above.
2800          */
2801         if (mode_blk) {
2802                 if (params_to_set & SA_PARAM_BLOCKSIZE)
2803                         scsi_ulto3b(blocksize, mode_blk->blklen);
2804                 else
2805                         scsi_ulto3b(current_blocksize, mode_blk->blklen);
2806
2807                 /*
2808                  * Set density if requested, else preserve old density.
2809                  * SCSI_SAME_DENSITY only applies to SCSI-2 or better
2810                  * devices, else density we've latched up in our softc.
2811                  */
2812                 if (params_to_set & SA_PARAM_DENSITY) {
2813                         mode_blk->density = density;
2814                 } else if (softc->scsi_rev > SCSI_REV_CCS) {
2815                         mode_blk->density = SCSI_SAME_DENSITY;
2816                 } else {
2817                         mode_blk->density = softc->media_density;
2818                 }
2819         }
2820
2821         /*
2822          * For mode selects, these two fields must be zero.
2823          */
2824         mode_hdr->data_length = 0;
2825         mode_hdr->medium_type = 0;
2826
2827         /* set the speed to the current value */
2828         mode_hdr->dev_spec = current_speed;
2829
2830         /* if set, set single-initiator buffering mode */
2831         if (softc->buffer_mode == SMH_SA_BUF_MODE_SIBUF) {
2832                 mode_hdr->dev_spec |= SMH_SA_BUF_MODE_SIBUF;
2833         }
2834
2835         if (mode_blk)
2836                 mode_hdr->blk_desc_len = sizeof(struct scsi_mode_blk_desc);
2837         else
2838                 mode_hdr->blk_desc_len = 0;
2839
2840         /*
2841          * First, if the user wants us to set the compression algorithm or
2842          * just turn compression on, check to make sure that this drive
2843          * supports compression.
2844          */
2845         if (params_to_set & SA_PARAM_COMPRESSION) {
2846                 /*
2847                  * If the compression algorithm is 0, disable compression.
2848                  * If the compression algorithm is non-zero, enable
2849                  * compression and set the compression type to the
2850                  * specified compression algorithm, unless the algorithm is
2851                  * MT_COMP_ENABLE.  In that case, we look at the
2852                  * compression algorithm that is currently set and if it is
2853                  * non-zero, we leave it as-is.  If it is zero, and we have
2854                  * saved a compression algorithm from a time when
2855                  * compression was enabled before, set the compression to
2856                  * the saved value.
2857                  */
2858                 switch (ccomp->hdr.pagecode & ~0x80) {
2859                 case SA_DEVICE_CONFIGURATION_PAGE:
2860                 {
2861                         struct scsi_dev_conf_page *dcp = &cpage->dconf;
2862                         if (calg == 0) {
2863                                 dcp->sel_comp_alg = SA_COMP_NONE;
2864                                 break;
2865                         }
2866                         if (calg != MT_COMP_ENABLE) {
2867                                 dcp->sel_comp_alg = calg;
2868                         } else if (dcp->sel_comp_alg == SA_COMP_NONE &&
2869                             softc->saved_comp_algorithm != 0) {
2870                                 dcp->sel_comp_alg = softc->saved_comp_algorithm;
2871                         }
2872                         break;
2873                 }
2874                 case SA_DATA_COMPRESSION_PAGE:
2875                 if (ccomp->dcomp.dce_and_dcc & SA_DCP_DCC) {
2876                         struct scsi_data_compression_page *dcp = &cpage->dcomp;
2877                         if (calg == 0) {
2878                                 /*
2879                                  * Disable compression, but leave the
2880                                  * decompression and the capability bit
2881                                  * alone.
2882                                  */
2883                                 dcp->dce_and_dcc = SA_DCP_DCC;
2884                                 dcp->dde_and_red |= SA_DCP_DDE;
2885                                 break;
2886                         }
2887                         /* enable compression && decompression */
2888                         dcp->dce_and_dcc = SA_DCP_DCE | SA_DCP_DCC;
2889                         dcp->dde_and_red |= SA_DCP_DDE;
2890                         /*
2891                          * If there, use compression algorithm from caller.
2892                          * Otherwise, if there's a saved compression algorithm
2893                          * and there is no current algorithm, use the saved
2894                          * algorithm. Else parrot back what we got and hope
2895                          * for the best.
2896                          */
2897                         if (calg != MT_COMP_ENABLE) {
2898                                 scsi_ulto4b(calg, dcp->comp_algorithm);
2899                                 scsi_ulto4b(calg, dcp->decomp_algorithm);
2900                         } else if (scsi_4btoul(dcp->comp_algorithm) == 0 &&
2901                             softc->saved_comp_algorithm != 0) {
2902                                 scsi_ulto4b(softc->saved_comp_algorithm,
2903                                     dcp->comp_algorithm);
2904                                 scsi_ulto4b(softc->saved_comp_algorithm,
2905                                     dcp->decomp_algorithm);
2906                         }
2907                         break;
2908                 }
2909                 /*
2910                  * Compression does not appear to be supported-
2911                  * at least via the DATA COMPRESSION page. It
2912                  * would be too much to ask us to believe that
2913                  * the page itself is supported, but incorrectly
2914                  * reports an ability to manipulate data compression,
2915                  * so we'll assume that this device doesn't support
2916                  * compression. We can just fall through for that.
2917                  */
2918                 /* FALLTHROUGH */
2919                 default:
2920                         /*
2921                          * The drive doesn't seem to support compression,
2922                          * so turn off the set compression bit.
2923                          */
2924                         params_to_set &= ~SA_PARAM_COMPRESSION;
2925                         xpt_print(periph->path,
2926                             "device does not seem to support compression\n");
2927
2928                         /*
2929                          * If that was the only thing the user wanted us to set,
2930                          * clean up allocated resources and return with
2931                          * 'operation not supported'.
2932                          */
2933                         if (params_to_set == SA_PARAM_NONE) {
2934                                 free(mode_buffer, M_SCSISA);
2935                                 xpt_release_ccb(ccb);
2936                                 return (ENODEV);
2937                         }
2938
2939                         /*
2940                          * That wasn't the only thing the user wanted us to set.
2941                          * So, decrease the stated mode buffer length by the
2942                          * size of the compression mode page.
2943                          */
2944                         mode_buffer_len -= sizeof(sa_comp_t);
2945                 }
2946         }
2947
2948         /* It is safe to retry this operation */
2949         scsi_mode_select(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG,
2950             (params_to_set & SA_PARAM_COMPRESSION)? TRUE : FALSE,
2951             FALSE, mode_buffer, mode_buffer_len, SSD_FULL_SIZE, SCSIOP_TIMEOUT);
2952
2953         error = cam_periph_runccb(ccb, saerror, 0,
2954             sense_flags, softc->device_stats);
2955         QFRLS(ccb);
2956
2957         if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
2958                 int idx;
2959                 char *xyz = mode_buffer;
2960                 xpt_print_path(periph->path);
2961                 printf("Err%d, Mode Select Data=", error);
2962                 for (idx = 0; idx < mode_buffer_len; idx++)
2963                         printf(" 0x%02x", xyz[idx] & 0xff);
2964                 printf("\n");
2965         }
2966
2967
2968         if (error) {
2969                 /*
2970                  * If we can, try without setting density/blocksize.
2971                  */
2972                 if (mode_blk) {
2973                         if ((params_to_set &
2974                             (SA_PARAM_DENSITY|SA_PARAM_BLOCKSIZE)) == 0) {
2975                                 mode_blk = NULL;
2976                                 goto retry;
2977                         }
2978                 } else {
2979                         mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1];
2980                         cpage = (sa_comp_t *)&mode_blk[1];
2981                 }
2982
2983                 /*
2984                  * If we were setting the blocksize, and that failed, we
2985                  * want to set it to its original value.  If we weren't
2986                  * setting the blocksize, we don't want to change it.
2987                  */
2988                 scsi_ulto3b(current_blocksize, mode_blk->blklen);
2989
2990                 /*
2991                  * Set density if requested, else preserve old density.
2992                  * SCSI_SAME_DENSITY only applies to SCSI-2 or better
2993                  * devices, else density we've latched up in our softc.
2994                  */
2995                 if (params_to_set & SA_PARAM_DENSITY) {
2996                         mode_blk->density = current_density;
2997                 } else if (softc->scsi_rev > SCSI_REV_CCS) {
2998                         mode_blk->density = SCSI_SAME_DENSITY;
2999                 } else {
3000                         mode_blk->density = softc->media_density;
3001                 }
3002
3003                 if (params_to_set & SA_PARAM_COMPRESSION)
3004                         bcopy(ccomp, cpage, sizeof (sa_comp_t));
3005
3006                 /*
3007                  * The retry count is the only CCB field that might have been
3008                  * changed that we care about, so reset it back to 1.
3009                  */
3010                 ccb->ccb_h.retry_count = 1;
3011                 cam_periph_runccb(ccb, saerror, 0, sense_flags,
3012                     softc->device_stats);
3013                 QFRLS(ccb);
3014         }
3015
3016         xpt_release_ccb(ccb);
3017
3018         if (ccomp != NULL)
3019                 free(ccomp, M_SCSISA);
3020
3021         if (params_to_set & SA_PARAM_COMPRESSION) {
3022                 if (error) {
3023                         softc->flags &= ~SA_FLAG_COMP_ENABLED;
3024                         /*
3025                          * Even if we get an error setting compression,
3026                          * do not say that we don't support it. We could
3027                          * have been wrong, or it may be media specific.
3028                          *      softc->flags &= ~SA_FLAG_COMP_SUPP;
3029                          */
3030                         softc->saved_comp_algorithm = softc->comp_algorithm;
3031                         softc->comp_algorithm = 0;
3032                 } else {
3033                         softc->flags |= SA_FLAG_COMP_ENABLED;
3034                         softc->comp_algorithm = calg;
3035                 }
3036         }
3037
3038         free(mode_buffer, M_SCSISA);
3039         return (error);
3040 }
3041
3042 static void
3043 saprevent(struct cam_periph *periph, int action)
3044 {
3045         struct  sa_softc *softc;
3046         union   ccb *ccb;
3047         int     error, sf;
3048
3049         softc = (struct sa_softc *)periph->softc;
3050
3051         if ((action == PR_ALLOW) && (softc->flags & SA_FLAG_TAPE_LOCKED) == 0)
3052                 return;
3053         if ((action == PR_PREVENT) && (softc->flags & SA_FLAG_TAPE_LOCKED) != 0)
3054                 return;
3055
3056         /*
3057          * We can be quiet about illegal requests.
3058          */
3059         if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
3060                 sf = 0;
3061         } else
3062                 sf = SF_QUIET_IR;
3063
3064         ccb = cam_periph_getccb(periph, 1);
3065
3066         /* It is safe to retry this operation */
3067         scsi_prevent(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, action,
3068             SSD_FULL_SIZE, SCSIOP_TIMEOUT);
3069
3070         error = cam_periph_runccb(ccb, saerror, 0, sf, softc->device_stats);
3071         QFRLS(ccb);
3072         if (error == 0) {
3073                 if (action == PR_ALLOW)
3074                         softc->flags &= ~SA_FLAG_TAPE_LOCKED;
3075                 else
3076                         softc->flags |= SA_FLAG_TAPE_LOCKED;
3077         }
3078
3079         xpt_release_ccb(ccb);
3080 }
3081
3082 static int
3083 sarewind(struct cam_periph *periph)
3084 {
3085         union   ccb *ccb;
3086         struct  sa_softc *softc;
3087         int     error;
3088
3089         softc = (struct sa_softc *)periph->softc;
3090
3091         ccb = cam_periph_getccb(periph, 1);
3092
3093         /* It is safe to retry this operation */
3094         scsi_rewind(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, FALSE,
3095             SSD_FULL_SIZE, REWIND_TIMEOUT);
3096
3097         softc->dsreg = MTIO_DSREG_REW;
3098         error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
3099         softc->dsreg = MTIO_DSREG_REST;
3100
3101         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3102                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE);
3103
3104         xpt_release_ccb(ccb);
3105         if (error == 0)
3106                 softc->fileno = softc->blkno = (daddr_t) 0;
3107         else
3108                 softc->fileno = softc->blkno = (daddr_t) -1;
3109         return (error);
3110 }
3111
3112 static int
3113 saspace(struct cam_periph *periph, int count, scsi_space_code code)
3114 {
3115         union   ccb *ccb;
3116         struct  sa_softc *softc;
3117         int     error;
3118
3119         softc = (struct sa_softc *)periph->softc;
3120
3121         ccb = cam_periph_getccb(periph, 1);
3122
3123         /* This cannot be retried */
3124
3125         scsi_space(&ccb->csio, 0, sadone, MSG_SIMPLE_Q_TAG, code, count,
3126             SSD_FULL_SIZE, SPACE_TIMEOUT);
3127
3128         /*
3129          * Clear residual because we will be using it.
3130          */
3131         softc->last_ctl_resid = 0;
3132
3133         softc->dsreg = (count < 0)? MTIO_DSREG_REV : MTIO_DSREG_FWD;
3134         error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
3135         softc->dsreg = MTIO_DSREG_REST;
3136
3137         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3138                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE);
3139
3140         xpt_release_ccb(ccb);
3141
3142         /*
3143          * If a spacing operation has failed, we need to invalidate
3144          * this mount.
3145          *
3146          * If the spacing operation was setmarks or to end of recorded data,
3147          * we no longer know our relative position.
3148          *
3149          * If the spacing operations was spacing files in reverse, we
3150          * take account of the residual, but still check against less
3151          * than zero- if we've gone negative, we must have hit BOT.
3152          *
3153          * If the spacing operations was spacing records in reverse and
3154          * we have a residual, we've either hit BOT or hit a filemark.
3155          * In the former case, we know our new record number (0). In
3156          * the latter case, we have absolutely no idea what the real
3157          * record number is- we've stopped between the end of the last
3158          * record in the previous file and the filemark that stopped
3159          * our spacing backwards.
3160          */
3161         if (error) {
3162                 softc->fileno = softc->blkno = (daddr_t) -1;
3163         } else if (code == SS_SETMARKS || code == SS_EOD) {
3164                 softc->fileno = softc->blkno = (daddr_t) -1;
3165         } else if (code == SS_FILEMARKS && softc->fileno != (daddr_t) -1) {
3166                 softc->fileno += (count - softc->last_ctl_resid);
3167                 if (softc->fileno < 0)  /* we must of hit BOT */
3168                         softc->fileno = 0;
3169                 softc->blkno = 0;
3170         } else if (code == SS_BLOCKS && softc->blkno != (daddr_t) -1) {
3171                 softc->blkno += (count - softc->last_ctl_resid);
3172                 if (count < 0) {
3173                         if (softc->last_ctl_resid || softc->blkno < 0) {
3174                                 if (softc->fileno == 0) {
3175                                         softc->blkno = 0;
3176                                 } else {
3177                                         softc->blkno = (daddr_t) -1;
3178                                 }
3179                         }
3180                 }
3181         }
3182         return (error);
3183 }
3184
3185 static int
3186 sawritefilemarks(struct cam_periph *periph, int nmarks, int setmarks)
3187 {
3188         union   ccb *ccb;
3189         struct  sa_softc *softc;
3190         int     error, nwm = 0;
3191
3192         softc = (struct sa_softc *)periph->softc;
3193         if (softc->open_rdonly)
3194                 return (EBADF);
3195
3196         ccb = cam_periph_getccb(periph, 1);
3197         /*
3198          * Clear residual because we will be using it.
3199          */
3200         softc->last_ctl_resid = 0;
3201
3202         softc->dsreg = MTIO_DSREG_FMK;
3203         /* this *must* not be retried */
3204         scsi_write_filemarks(&ccb->csio, 0, sadone, MSG_SIMPLE_Q_TAG,
3205             FALSE, setmarks, nmarks, SSD_FULL_SIZE, IO_TIMEOUT);
3206         softc->dsreg = MTIO_DSREG_REST;
3207
3208
3209         error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
3210
3211         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3212                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE);
3213
3214         if (error == 0 && nmarks) {
3215                 struct sa_softc *softc = (struct sa_softc *)periph->softc;
3216                 nwm = nmarks - softc->last_ctl_resid;
3217                 softc->filemarks += nwm;
3218         }
3219
3220         xpt_release_ccb(ccb);
3221
3222         /*
3223          * Update relative positions (if we're doing that).
3224          */
3225         if (error) {
3226                 softc->fileno = softc->blkno = (daddr_t) -1;
3227         } else if (softc->fileno != (daddr_t) -1) {
3228                 softc->fileno += nwm;
3229                 softc->blkno = 0;
3230         }
3231         return (error);
3232 }
3233
3234 static int
3235 sardpos(struct cam_periph *periph, int hard, u_int32_t *blkptr)
3236 {
3237         struct scsi_tape_position_data loc;
3238         union ccb *ccb;
3239         struct sa_softc *softc = (struct sa_softc *)periph->softc;
3240         int error;
3241
3242         /*
3243          * We try and flush any buffered writes here if we were writing
3244          * and we're trying to get hardware block position. It eats
3245          * up performance substantially, but I'm wary of drive firmware.
3246          *
3247          * I think that *logical* block position is probably okay-
3248          * but hardware block position might have to wait for data
3249          * to hit media to be valid. Caveat Emptor.
3250          */
3251
3252         if (hard && (softc->flags & SA_FLAG_TAPE_WRITTEN)) {
3253                 error = sawritefilemarks(periph, 0, 0);
3254                 if (error && error != EACCES)
3255                         return (error);
3256         }
3257
3258         ccb = cam_periph_getccb(periph, 1);
3259         scsi_read_position(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG,
3260             hard, &loc, SSD_FULL_SIZE, SCSIOP_TIMEOUT);
3261         softc->dsreg = MTIO_DSREG_RBSY;
3262         error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
3263         softc->dsreg = MTIO_DSREG_REST;
3264         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3265                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, 0);
3266
3267         if (error == 0) {
3268                 if (loc.flags & SA_RPOS_UNCERTAIN) {
3269                         error = EINVAL;         /* nothing is certain */
3270                 } else {
3271                         *blkptr = scsi_4btoul(loc.firstblk);
3272                 }
3273         }
3274
3275         xpt_release_ccb(ccb);
3276         return (error);
3277 }
3278
3279 static int
3280 sasetpos(struct cam_periph *periph, int hard, u_int32_t *blkptr)
3281 {
3282         union ccb *ccb;
3283         struct sa_softc *softc;
3284         int error;
3285
3286         /*
3287          * We used to try and flush any buffered writes here.
3288          * Now we push this onto user applications to either
3289          * flush the pending writes themselves (via a zero count
3290          * WRITE FILEMARKS command) or they can trust their tape
3291          * drive to do this correctly for them.
3292          */
3293
3294         softc = (struct sa_softc *)periph->softc;
3295         ccb = cam_periph_getccb(periph, 1);
3296
3297
3298         scsi_set_position(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG,
3299             hard, *blkptr, SSD_FULL_SIZE, SPACE_TIMEOUT);
3300
3301
3302         softc->dsreg = MTIO_DSREG_POS;
3303         error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
3304         softc->dsreg = MTIO_DSREG_REST;
3305         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3306                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, 0);
3307         xpt_release_ccb(ccb);
3308         /*
3309          * Note relative file && block number position as now unknown.
3310          */
3311         softc->fileno = softc->blkno = (daddr_t) -1;
3312         return (error);
3313 }
3314
3315 static int
3316 saretension(struct cam_periph *periph)
3317 {
3318         union ccb *ccb;
3319         struct sa_softc *softc;
3320         int error;
3321
3322         softc = (struct sa_softc *)periph->softc;
3323
3324         ccb = cam_periph_getccb(periph, 1);
3325
3326         /* It is safe to retry this operation */
3327         scsi_load_unload(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, FALSE,
3328             FALSE, TRUE,  TRUE, SSD_FULL_SIZE, ERASE_TIMEOUT);
3329
3330         softc->dsreg = MTIO_DSREG_TEN;
3331         error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
3332         softc->dsreg = MTIO_DSREG_REST;
3333
3334         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3335                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE);
3336         xpt_release_ccb(ccb);
3337         if (error == 0)
3338                 softc->fileno = softc->blkno = (daddr_t) 0;
3339         else
3340                 softc->fileno = softc->blkno = (daddr_t) -1;
3341         return (error);
3342 }
3343
3344 static int
3345 sareservereleaseunit(struct cam_periph *periph, int reserve)
3346 {
3347         union ccb *ccb;
3348         struct sa_softc *softc;
3349         int error;
3350
3351         softc = (struct sa_softc *)periph->softc;
3352         ccb = cam_periph_getccb(periph,  1);
3353
3354         /* It is safe to retry this operation */
3355         scsi_reserve_release_unit(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG,
3356             FALSE,  0, SSD_FULL_SIZE,  SCSIOP_TIMEOUT, reserve);
3357         softc->dsreg = MTIO_DSREG_RBSY;
3358         error = cam_periph_runccb(ccb, saerror, 0,
3359             SF_RETRY_UA | SF_NO_PRINT, softc->device_stats);
3360         softc->dsreg = MTIO_DSREG_REST;
3361         QFRLS(ccb);
3362         xpt_release_ccb(ccb);
3363
3364         /*
3365          * If the error was Illegal Request, then the device doesn't support
3366          * RESERVE/RELEASE. This is not an error.
3367          */
3368         if (error == EINVAL) {
3369                 error = 0;
3370         }
3371
3372         return (error);
3373 }
3374
3375 static int
3376 saloadunload(struct cam_periph *periph, int load)
3377 {
3378         union   ccb *ccb;
3379         struct  sa_softc *softc;
3380         int     error;
3381
3382         softc = (struct sa_softc *)periph->softc;
3383
3384         ccb = cam_periph_getccb(periph, 1);
3385
3386         /* It is safe to retry this operation */
3387         scsi_load_unload(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, FALSE,
3388             FALSE, FALSE, load, SSD_FULL_SIZE, REWIND_TIMEOUT);
3389
3390         softc->dsreg = (load)? MTIO_DSREG_LD : MTIO_DSREG_UNL;
3391         error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
3392         softc->dsreg = MTIO_DSREG_REST;
3393         QFRLS(ccb);
3394         xpt_release_ccb(ccb);
3395
3396         if (error || load == 0)
3397                 softc->fileno = softc->blkno = (daddr_t) -1;
3398         else if (error == 0)
3399                 softc->fileno = softc->blkno = (daddr_t) 0;
3400         return (error);
3401 }
3402
3403 static int
3404 saerase(struct cam_periph *periph, int longerase)
3405 {
3406
3407         union   ccb *ccb;
3408         struct  sa_softc *softc;
3409         int error;
3410
3411         softc = (struct sa_softc *)periph->softc;
3412         if (softc->open_rdonly)
3413                 return (EBADF);
3414
3415         ccb = cam_periph_getccb(periph, 1);
3416
3417         scsi_erase(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG, FALSE, longerase,
3418             SSD_FULL_SIZE, ERASE_TIMEOUT);
3419
3420         softc->dsreg = MTIO_DSREG_ZER;
3421         error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
3422         softc->dsreg = MTIO_DSREG_REST;
3423
3424         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3425                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE);
3426         xpt_release_ccb(ccb);
3427         return (error);
3428 }
3429
3430 #endif /* _KERNEL */
3431
3432 /*
3433  * Read tape block limits command.
3434  */
3435 void
3436 scsi_read_block_limits(struct ccb_scsiio *csio, u_int32_t retries,
3437                    void (*cbfcnp)(struct cam_periph *, union ccb *),
3438                    u_int8_t tag_action,
3439                    struct scsi_read_block_limits_data *rlimit_buf,
3440                    u_int8_t sense_len, u_int32_t timeout)
3441 {
3442         struct scsi_read_block_limits *scsi_cmd;
3443
3444         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_IN, tag_action,
3445              (u_int8_t *)rlimit_buf, sizeof(*rlimit_buf), sense_len,
3446              sizeof(*scsi_cmd), timeout);
3447
3448         scsi_cmd = (struct scsi_read_block_limits *)&csio->cdb_io.cdb_bytes;
3449         bzero(scsi_cmd, sizeof(*scsi_cmd));
3450         scsi_cmd->opcode = READ_BLOCK_LIMITS;
3451 }
3452
3453 void
3454 scsi_sa_read_write(struct ccb_scsiio *csio, u_int32_t retries,
3455                    void (*cbfcnp)(struct cam_periph *, union ccb *),
3456                    u_int8_t tag_action, int readop, int sli,
3457                    int fixed, u_int32_t length, u_int8_t *data_ptr,
3458                    u_int32_t dxfer_len, u_int8_t sense_len, u_int32_t timeout)
3459 {
3460         struct scsi_sa_rw *scsi_cmd;
3461
3462         scsi_cmd = (struct scsi_sa_rw *)&csio->cdb_io.cdb_bytes;
3463         scsi_cmd->opcode = readop ? SA_READ : SA_WRITE;
3464         scsi_cmd->sli_fixed = 0;
3465         if (sli && readop)
3466                 scsi_cmd->sli_fixed |= SAR_SLI;
3467         if (fixed)
3468                 scsi_cmd->sli_fixed |= SARW_FIXED;
3469         scsi_ulto3b(length, scsi_cmd->length);
3470         scsi_cmd->control = 0;
3471
3472         cam_fill_csio(csio, retries, cbfcnp, readop ? CAM_DIR_IN : CAM_DIR_OUT,
3473             tag_action, data_ptr, dxfer_len, sense_len,
3474             sizeof(*scsi_cmd), timeout);
3475 }
3476
3477 void
3478 scsi_load_unload(struct ccb_scsiio *csio, u_int32_t retries,
3479                  void (*cbfcnp)(struct cam_periph *, union ccb *),
3480                  u_int8_t tag_action, int immediate, int eot,
3481                  int reten, int load, u_int8_t sense_len,
3482                  u_int32_t timeout)
3483 {
3484         struct scsi_load_unload *scsi_cmd;
3485
3486         scsi_cmd = (struct scsi_load_unload *)&csio->cdb_io.cdb_bytes;
3487         bzero(scsi_cmd, sizeof(*scsi_cmd));
3488         scsi_cmd->opcode = LOAD_UNLOAD;
3489         if (immediate)
3490                 scsi_cmd->immediate = SLU_IMMED;
3491         if (eot)
3492                 scsi_cmd->eot_reten_load |= SLU_EOT;
3493         if (reten)
3494                 scsi_cmd->eot_reten_load |= SLU_RETEN;
3495         if (load)
3496                 scsi_cmd->eot_reten_load |= SLU_LOAD;
3497
3498         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action,
3499             NULL, 0, sense_len, sizeof(*scsi_cmd), timeout);
3500 }
3501
3502 void
3503 scsi_rewind(struct ccb_scsiio *csio, u_int32_t retries,
3504             void (*cbfcnp)(struct cam_periph *, union ccb *),
3505             u_int8_t tag_action, int immediate, u_int8_t sense_len,
3506             u_int32_t timeout)
3507 {
3508         struct scsi_rewind *scsi_cmd;
3509
3510         scsi_cmd = (struct scsi_rewind *)&csio->cdb_io.cdb_bytes;
3511         bzero(scsi_cmd, sizeof(*scsi_cmd));
3512         scsi_cmd->opcode = REWIND;
3513         if (immediate)
3514                 scsi_cmd->immediate = SREW_IMMED;
3515
3516         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
3517             0, sense_len, sizeof(*scsi_cmd), timeout);
3518 }
3519
3520 void
3521 scsi_space(struct ccb_scsiio *csio, u_int32_t retries,
3522            void (*cbfcnp)(struct cam_periph *, union ccb *),
3523            u_int8_t tag_action, scsi_space_code code,
3524            u_int32_t count, u_int8_t sense_len, u_int32_t timeout)
3525 {
3526         struct scsi_space *scsi_cmd;
3527
3528         scsi_cmd = (struct scsi_space *)&csio->cdb_io.cdb_bytes;
3529         scsi_cmd->opcode = SPACE;
3530         scsi_cmd->code = code;
3531         scsi_ulto3b(count, scsi_cmd->count);
3532         scsi_cmd->control = 0;
3533
3534         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
3535             0, sense_len, sizeof(*scsi_cmd), timeout);
3536 }
3537
3538 void
3539 scsi_write_filemarks(struct ccb_scsiio *csio, u_int32_t retries,
3540                      void (*cbfcnp)(struct cam_periph *, union ccb *),
3541                      u_int8_t tag_action, int immediate, int setmark,
3542                      u_int32_t num_marks, u_int8_t sense_len,
3543                      u_int32_t timeout)
3544 {
3545         struct scsi_write_filemarks *scsi_cmd;
3546
3547         scsi_cmd = (struct scsi_write_filemarks *)&csio->cdb_io.cdb_bytes;
3548         bzero(scsi_cmd, sizeof(*scsi_cmd));
3549         scsi_cmd->opcode = WRITE_FILEMARKS;
3550         if (immediate)
3551                 scsi_cmd->byte2 |= SWFMRK_IMMED;
3552         if (setmark)
3553                 scsi_cmd->byte2 |= SWFMRK_WSMK;
3554
3555         scsi_ulto3b(num_marks, scsi_cmd->num_marks);
3556
3557         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
3558             0, sense_len, sizeof(*scsi_cmd), timeout);
3559 }
3560
3561 /*
3562  * The reserve and release unit commands differ only by their opcodes.
3563  */
3564 void
3565 scsi_reserve_release_unit(struct ccb_scsiio *csio, u_int32_t retries,
3566                           void (*cbfcnp)(struct cam_periph *, union ccb *),
3567                           u_int8_t tag_action, int third_party,
3568                           int third_party_id, u_int8_t sense_len,
3569                           u_int32_t timeout, int reserve)
3570 {
3571         struct scsi_reserve_release_unit *scsi_cmd;
3572
3573         scsi_cmd = (struct scsi_reserve_release_unit *)&csio->cdb_io.cdb_bytes;
3574         bzero(scsi_cmd, sizeof(*scsi_cmd));
3575
3576         if (reserve)
3577                 scsi_cmd->opcode = RESERVE_UNIT;
3578         else
3579                 scsi_cmd->opcode = RELEASE_UNIT;
3580
3581         if (third_party) {
3582                 scsi_cmd->lun_thirdparty |= SRRU_3RD_PARTY;
3583                 scsi_cmd->lun_thirdparty |=
3584                         ((third_party_id << SRRU_3RD_SHAMT) & SRRU_3RD_MASK);
3585         }
3586
3587         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
3588             0, sense_len, sizeof(*scsi_cmd), timeout);
3589 }
3590
3591 void
3592 scsi_erase(struct ccb_scsiio *csio, u_int32_t retries,
3593            void (*cbfcnp)(struct cam_periph *, union ccb *),
3594            u_int8_t tag_action, int immediate, int long_erase,
3595            u_int8_t sense_len, u_int32_t timeout)
3596 {
3597         struct scsi_erase *scsi_cmd;
3598
3599         scsi_cmd = (struct scsi_erase *)&csio->cdb_io.cdb_bytes;
3600         bzero(scsi_cmd, sizeof(*scsi_cmd));
3601
3602         scsi_cmd->opcode = ERASE;
3603
3604         if (immediate)
3605                 scsi_cmd->lun_imm_long |= SE_IMMED;
3606
3607         if (long_erase)
3608                 scsi_cmd->lun_imm_long |= SE_LONG;
3609
3610         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
3611             0, sense_len, sizeof(*scsi_cmd), timeout);
3612 }
3613
3614 /*
3615  * Read Tape Position command.
3616  */
3617 void
3618 scsi_read_position(struct ccb_scsiio *csio, u_int32_t retries,
3619                    void (*cbfcnp)(struct cam_periph *, union ccb *),
3620                    u_int8_t tag_action, int hardsoft,
3621                    struct scsi_tape_position_data *sbp,
3622                    u_int8_t sense_len, u_int32_t timeout)
3623 {
3624         struct scsi_tape_read_position *scmd;
3625
3626         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_IN, tag_action,
3627             (u_int8_t *)sbp, sizeof (*sbp), sense_len, sizeof(*scmd), timeout);
3628         scmd = (struct scsi_tape_read_position *)&csio->cdb_io.cdb_bytes;
3629         bzero(scmd, sizeof(*scmd));
3630         scmd->opcode = READ_POSITION;
3631         scmd->byte1 = hardsoft;
3632 }
3633
3634 /*
3635  * Set Tape Position command.
3636  */
3637 void
3638 scsi_set_position(struct ccb_scsiio *csio, u_int32_t retries,
3639                    void (*cbfcnp)(struct cam_periph *, union ccb *),
3640                    u_int8_t tag_action, int hardsoft, u_int32_t blkno,
3641                    u_int8_t sense_len, u_int32_t timeout)
3642 {
3643         struct scsi_tape_locate *scmd;
3644
3645         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action,
3646             (u_int8_t *)NULL, 0, sense_len, sizeof(*scmd), timeout);
3647         scmd = (struct scsi_tape_locate *)&csio->cdb_io.cdb_bytes;
3648         bzero(scmd, sizeof(*scmd));
3649         scmd->opcode = LOCATE;
3650         if (hardsoft)
3651                 scmd->byte1 |= SA_SPOS_BT;
3652         scsi_ulto4b(blkno, scmd->blkaddr);
3653 }