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