sys/cam/scsi/scsi_sa.c

   1 /*-
   2  * Implementation of SCSI Sequential Access Peripheral driver for CAM.
   3  *
   4  * Copyright (c) 1999, 2000 Matthew Jacob
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions, and the following disclaimer,
  12  *    without modification, immediately at the beginning of the file.
  13  * 2. The name of the author may not be used to endorse or promote products
  14  *    derived from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  20  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 #include <sys/cdefs.h>
  30 __FBSDID("$FreeBSD$");
  31
  32 #include <sys/param.h>
  33 #include <sys/queue.h>
  34 #ifdef _KERNEL
  35 #include <sys/systm.h>
  36 #include <sys/kernel.h>
  37 #endif
  38 #include <sys/types.h>
  39 #include <sys/time.h>
  40 #include <sys/bio.h>
  41 #include <sys/limits.h>
  42 #include <sys/malloc.h>
  43 #include <sys/mtio.h>
  44 #ifdef _KERNEL
  45 #include <sys/conf.h>
  46 #endif
  47 #include <sys/fcntl.h>
  48 #include <sys/devicestat.h>
  49
  50 #ifndef _KERNEL
  51 #include <stdio.h>
  52 #include <string.h>
  53 #endif
  54
  55 #include <cam/cam.h>
  56 #include <cam/cam_ccb.h>
  57 #include <cam/cam_periph.h>
  58 #include <cam/cam_xpt_periph.h>
  59 #include <cam/cam_debug.h>
  60
  61 #include <cam/scsi/scsi_all.h>
  62 #include <cam/scsi/scsi_message.h>
  63 #include <cam/scsi/scsi_sa.h>
  64
  65 #ifdef _KERNEL
  66
  67 #include <opt_sa.h>
  68
  69 #ifndef SA_IO_TIMEOUT
  70 #define SA_IO_TIMEOUT           4
  71 #endif
  72 #ifndef SA_SPACE_TIMEOUT
  73 #define SA_SPACE_TIMEOUT        1 * 60
  74 #endif
  75 #ifndef SA_REWIND_TIMEOUT
  76 #define SA_REWIND_TIMEOUT       2 * 60
  77 #endif
  78 #ifndef SA_ERASE_TIMEOUT
  79 #define SA_ERASE_TIMEOUT        4 * 60
  80 #endif
  81
  82 #define SCSIOP_TIMEOUT          (60 * 1000)     /* not an option */
  83
  84 #define IO_TIMEOUT              (SA_IO_TIMEOUT * 60 * 1000)
  85 #define REWIND_TIMEOUT          (SA_REWIND_TIMEOUT * 60 * 1000)
  86 #define ERASE_TIMEOUT           (SA_ERASE_TIMEOUT * 60 * 1000)
  87 #define SPACE_TIMEOUT           (SA_SPACE_TIMEOUT * 60 * 1000)
  88
  89 /*
  90  * Additional options that can be set for config: SA_1FM_AT_EOT
  91  */
  92
  93 #ifndef UNUSED_PARAMETER
  94 #define UNUSED_PARAMETER(x)     x = x
  95 #endif
  96
  97 #define QFRLS(ccb)      \
  98         if (((ccb)->ccb_h.status & CAM_DEV_QFRZN) != 0) \
  99                 cam_release_devq((ccb)->ccb_h.path, 0, 0, 0, FALSE)
 100
 101 /*
 102  * Driver states
 103  */
 104
 105 MALLOC_DEFINE(M_SCSISA, "SCSI sa", "SCSI sequential access buffers");
 106
 107 typedef enum {
 108         SA_STATE_NORMAL, SA_STATE_ABNORMAL
 109 } sa_state;
 110
 111 #define ccb_pflags      ppriv_field0
 112 #define ccb_bp          ppriv_ptr1
 113
 114 #define SA_CCB_BUFFER_IO        0x0
 115 #define SA_CCB_WAITING          0x1
 116 #define SA_CCB_TYPEMASK         0x1
 117 #define SA_POSITION_UPDATED     0x2
 118
 119 #define Set_CCB_Type(x, type)                           \
 120         x->ccb_h.ccb_pflags &= ~SA_CCB_TYPEMASK;        \
 121         x->ccb_h.ccb_pflags |= type
 122
 123 #define CCB_Type(x)     (x->ccb_h.ccb_pflags & SA_CCB_TYPEMASK)
 124
 125
 126
 127 typedef enum {
 128         SA_FLAG_OPEN            = 0x0001,
 129         SA_FLAG_FIXED           = 0x0002,
 130         SA_FLAG_TAPE_LOCKED     = 0x0004,
 131         SA_FLAG_TAPE_MOUNTED    = 0x0008,
 132         SA_FLAG_TAPE_WP         = 0x0010,
 133         SA_FLAG_TAPE_WRITTEN    = 0x0020,
 134         SA_FLAG_EOM_PENDING     = 0x0040,
 135         SA_FLAG_EIO_PENDING     = 0x0080,
 136         SA_FLAG_EOF_PENDING     = 0x0100,
 137         SA_FLAG_ERR_PENDING     = (SA_FLAG_EOM_PENDING|SA_FLAG_EIO_PENDING|
 138                                    SA_FLAG_EOF_PENDING),
 139         SA_FLAG_INVALID         = 0x0200,
 140         SA_FLAG_COMP_ENABLED    = 0x0400,
 141         SA_FLAG_COMP_SUPP       = 0x0800,
 142         SA_FLAG_COMP_UNSUPP     = 0x1000,
 143         SA_FLAG_TAPE_FROZEN     = 0x2000
 144 } sa_flags;
 145
 146 typedef enum {
 147         SA_MODE_REWIND          = 0x00,
 148         SA_MODE_NOREWIND        = 0x01,
 149         SA_MODE_OFFLINE         = 0x02
 150 } sa_mode;
 151
 152 typedef enum {
 153         SA_PARAM_NONE           = 0x00,
 154         SA_PARAM_BLOCKSIZE      = 0x01,
 155         SA_PARAM_DENSITY        = 0x02,
 156         SA_PARAM_COMPRESSION    = 0x04,
 157         SA_PARAM_BUFF_MODE      = 0x08,
 158         SA_PARAM_NUMBLOCKS      = 0x10,
 159         SA_PARAM_WP             = 0x20,
 160         SA_PARAM_SPEED          = 0x40,
 161         SA_PARAM_ALL            = 0x7f
 162 } sa_params;
 163
 164 typedef enum {
 165         SA_QUIRK_NONE           = 0x00,
 166         SA_QUIRK_NOCOMP         = 0x01, /* Can't deal with compression at all */
 167         SA_QUIRK_FIXED          = 0x02, /* Force fixed mode */
 168         SA_QUIRK_VARIABLE       = 0x04, /* Force variable mode */
 169         SA_QUIRK_2FM            = 0x08, /* Needs Two File Marks at EOD */
 170         SA_QUIRK_1FM            = 0x10, /* No more than 1 File Mark at EOD */
 171         SA_QUIRK_NODREAD        = 0x20, /* Don't try and dummy read density */
 172         SA_QUIRK_NO_MODESEL     = 0x40, /* Don't do mode select at all */
 173         SA_QUIRK_NO_CPAGE       = 0x80  /* Don't use DEVICE COMPRESSION page */
 174 } sa_quirks;
 175
 176 /* units are bits 4-7, 16-21 (1024 units) */
 177 #define SAUNIT(DEV) \
 178         (((dev2unit(DEV) & 0xF0) >> 4) |  ((dev2unit(DEV) & 0x3f0000) >> 16))
 179
 180 #define SAMODE(z) ((dev2unit(z) & 0x3))
 181 #define SADENSITY(z) (((dev2unit(z) >> 2) & 0x3))
 182 #define SA_IS_CTRL(z) (dev2unit(z) & (1 << 29))
 183
 184 #define SA_NOT_CTLDEV   0
 185 #define SA_CTLDEV       1
 186
 187 #define SA_ATYPE_R      0
 188 #define SA_ATYPE_NR     1
 189 #define SA_ATYPE_ER     2
 190
 191 #define SAMINOR(ctl, unit, mode, access) \
 192         ((ctl << 29) | ((unit & 0x3f0) << 16) | ((unit & 0xf) << 4) | \
 193         (mode << 0x2) | (access & 0x3))
 194
 195 #define SA_NUM_MODES    4
 196 struct sa_devs {
 197         struct cdev *ctl_dev;
 198         struct sa_mode_devs {
 199                 struct cdev *r_dev;
 200                 struct cdev *nr_dev;
 201                 struct cdev *er_dev;
 202         } mode_devs[SA_NUM_MODES];
 203 };
 204
 205 struct sa_softc {
 206         sa_state        state;
 207         sa_flags        flags;
 208         sa_quirks       quirks;
 209         struct          bio_queue_head bio_queue;
 210         int             queue_count;
 211         struct          devstat *device_stats;
 212         struct sa_devs  devs;
 213         int             blk_gran;
 214         int             blk_mask;
 215         int             blk_shift;
 216         u_int32_t       max_blk;
 217         u_int32_t       min_blk;
 218         u_int32_t       comp_algorithm;
 219         u_int32_t       saved_comp_algorithm;
 220         u_int32_t       media_blksize;
 221         u_int32_t       last_media_blksize;
 222         u_int32_t       media_numblks;
 223         u_int8_t        media_density;
 224         u_int8_t        speed;
 225         u_int8_t        scsi_rev;
 226         u_int8_t        dsreg;          /* mtio mt_dsreg, redux */
 227         int             buffer_mode;
 228         int             filemarks;
 229         union           ccb saved_ccb;
 230         int             last_resid_was_io;
 231
 232         /*
 233          * Relative to BOT Location.
 234          */
 235         daddr_t         fileno;
 236         daddr_t         blkno;
 237
 238         /*
 239          * Latched Error Info
 240          */
 241         struct {
 242                 struct scsi_sense_data _last_io_sense;
 243                 u_int32_t _last_io_resid;
 244                 u_int8_t _last_io_cdb[CAM_MAX_CDBLEN];
 245                 struct scsi_sense_data _last_ctl_sense;
 246                 u_int32_t _last_ctl_resid;
 247                 u_int8_t _last_ctl_cdb[CAM_MAX_CDBLEN];
 248 #define last_io_sense   errinfo._last_io_sense
 249 #define last_io_resid   errinfo._last_io_resid
 250 #define last_io_cdb     errinfo._last_io_cdb
 251 #define last_ctl_sense  errinfo._last_ctl_sense
 252 #define last_ctl_resid  errinfo._last_ctl_resid
 253 #define last_ctl_cdb    errinfo._last_ctl_cdb
 254         } errinfo;
 255         /*
 256          * Misc other flags/state
 257          */
 258         u_int32_t
 259                                         : 29,
 260                 open_rdonly             : 1,    /* open read-only */
 261                 open_pending_mount      : 1,    /* open pending mount */
 262                 ctrl_mode               : 1;    /* control device open */
 263 };
 264
 265 struct sa_quirk_entry {
 266         struct scsi_inquiry_pattern inq_pat;    /* matching pattern */
 267         sa_quirks quirks;       /* specific quirk type */
 268         u_int32_t prefblk;      /* preferred blocksize when in fixed mode */
 269 };
 270
 271 static struct sa_quirk_entry sa_quirk_table[] =
 272 {
 273         {
 274                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "OnStream",
 275                   "ADR*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_NODREAD |
 276                    SA_QUIRK_1FM|SA_QUIRK_NO_MODESEL, 32768
 277         },
 278         {
 279                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
 280                   "Python 06408*", "*"}, SA_QUIRK_NODREAD, 0
 281         },
 282         {
 283                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
 284                   "Python 25601*", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_NODREAD, 0
 285         },
 286         {
 287                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
 288                   "Python*", "*"}, SA_QUIRK_NODREAD, 0
 289         },
 290         {
 291                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
 292                   "VIPER 150*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512
 293         },
 294         {
 295                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
 296                   "VIPER 2525 25462", "-011"},
 297                   SA_QUIRK_NOCOMP|SA_QUIRK_1FM|SA_QUIRK_NODREAD, 0
 298         },
 299         {
 300                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
 301                   "VIPER 2525*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 1024
 302         },
 303 #if     0
 304         {
 305                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
 306                   "C15*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_NO_CPAGE, 0,
 307         },
 308 #endif
 309         {
 310                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
 311                   "C56*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0
 312         },
 313         {
 314                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
 315                   "T20*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512
 316         },
 317         {
 318                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
 319                   "T4000*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512
 320         },
 321         {
 322                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
 323                   "HP-88780*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0
 324         },
 325         {
 326                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "KENNEDY",
 327                   "*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0
 328         },
 329         {
 330                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "M4 DATA",
 331                   "123107 SCSI*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0
 332         },
 333         {       /* jreynold@primenet.com */
 334                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "Seagate",
 335                 "STT8000N*", "*"}, SA_QUIRK_1FM, 0
 336         },
 337         {       /* mike@sentex.net */
 338                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "Seagate",
 339                 "STT20000*", "*"}, SA_QUIRK_1FM, 0
 340         },
 341         {
 342                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
 343                   " TDC 3600", "U07:"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512
 344         },
 345         {
 346                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
 347                   " TDC 3800", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512
 348         },
 349         {
 350                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
 351                   " TDC 4100", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512
 352         },
 353         {
 354                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
 355                   " TDC 4200", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512
 356         },
 357         {
 358                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
 359                   " SLR*", "*"}, SA_QUIRK_1FM, 0
 360         },
 361         {
 362                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "WANGTEK",
 363                   "5525ES*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512
 364         },
 365         {
 366                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "WANGTEK",
 367                   "51000*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 1024
 368         }
 369 };
 370
 371 static  d_open_t        saopen;
 372 static  d_close_t       saclose;
 373 static  d_strategy_t    sastrategy;
 374 static  d_ioctl_t       saioctl;
 375 static  periph_init_t   sainit;
 376 static  periph_ctor_t   saregister;
 377 static  periph_oninv_t  saoninvalidate;
 378 static  periph_dtor_t   sacleanup;
 379 static  periph_start_t  sastart;
 380 static  void            saasync(void *callback_arg, u_int32_t code,
 381                                 struct cam_path *path, void *arg);
 382 static  void            sadone(struct cam_periph *periph,
 383                                union ccb *start_ccb);
 384 static  int             saerror(union ccb *ccb, u_int32_t cam_flags,
 385                                 u_int32_t sense_flags);
 386 static int              samarkswanted(struct cam_periph *);
 387 static int              sacheckeod(struct cam_periph *periph);
 388 static int              sagetparams(struct cam_periph *periph,
 389                                     sa_params params_to_get,
 390                                     u_int32_t *blocksize, u_int8_t *density,
 391                                     u_int32_t *numblocks, int *buff_mode,
 392                                     u_int8_t *write_protect, u_int8_t *speed,
 393                                     int *comp_supported, int *comp_enabled,
 394                                     u_int32_t *comp_algorithm,
 395                                     sa_comp_t *comp_page);
 396 static int              sasetparams(struct cam_periph *periph,
 397                                     sa_params params_to_set,
 398                                     u_int32_t blocksize, u_int8_t density,
 399                                     u_int32_t comp_algorithm,
 400                                     u_int32_t sense_flags);
 401 static void             saprevent(struct cam_periph *periph, int action);
 402 static int              sarewind(struct cam_periph *periph);
 403 static int              saspace(struct cam_periph *periph, int count,
 404                                 scsi_space_code code);
 405 static int              samount(struct cam_periph *, int, struct cdev *);
 406 static int              saretension(struct cam_periph *periph);
 407 static int              sareservereleaseunit(struct cam_periph *periph,
 408                                              int reserve);
 409 static int              saloadunload(struct cam_periph *periph, int load);
 410 static int              saerase(struct cam_periph *periph, int longerase);
 411 static int              sawritefilemarks(struct cam_periph *periph,
 412                                          int nmarks, int setmarks);
 413 static int              sardpos(struct cam_periph *periph, int, u_int32_t *);
 414 static int              sasetpos(struct cam_periph *periph, int, u_int32_t *);
 415
 416
 417 static struct periph_driver sadriver =
 418 {
 419         sainit, "sa",
 420         TAILQ_HEAD_INITIALIZER(sadriver.units), /* generation */ 0
 421 };
 422
 423 PERIPHDRIVER_DECLARE(sa, sadriver);
 424
 425 /* For 2.2-stable support */
 426 #ifndef D_TAPE
 427 #define D_TAPE 0
 428 #endif
 429
 430
 431 static struct cdevsw sa_cdevsw = {
 432         .d_version =    D_VERSION,
 433         .d_open =       saopen,
 434         .d_close =      saclose,
 435         .d_read =       physread,
 436         .d_write =      physwrite,
 437         .d_ioctl =      saioctl,
 438         .d_strategy =   sastrategy,
 439         .d_name =       "sa",
 440         .d_flags =      D_TAPE | D_NEEDGIANT,
 441 };
 442
 443 static int
 444 saopen(struct cdev *dev, int flags, int fmt, struct thread *td)
 445 {
 446         struct cam_periph *periph;
 447         struct sa_softc *softc;
 448         int unit;
 449         int error;
 450
 451         unit = SAUNIT(dev);
 452
 453         periph = (struct cam_periph *)dev->si_drv1;
 454         if (cam_periph_acquire(periph) != CAM_REQ_CMP) {
 455                 return (ENXIO);
 456         }
 457
 458         cam_periph_lock(periph);
 459
 460         softc = (struct sa_softc *)periph->softc;
 461
 462         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE|CAM_DEBUG_INFO,
 463             ("saopen(%d): dev=0x%x softc=0x%x\n", unit, unit, softc->flags));
 464
 465         if (SA_IS_CTRL(dev)) {
 466                 softc->ctrl_mode = 1;
 467                 cam_periph_unlock(periph);
 468                 return (0);
 469         }
 470
 471         if ((error = cam_periph_hold(periph, PRIBIO|PCATCH)) != 0) {
 472                 cam_periph_unlock(periph);
 473                 cam_periph_release(periph);
 474                 return (error);
 475         }
 476
 477         if (softc->flags & SA_FLAG_OPEN) {
 478                 error = EBUSY;
 479         } else if (softc->flags & SA_FLAG_INVALID) {
 480                 error = ENXIO;
 481         } else {
 482                 /*
 483                  * Preserve whether this is a read_only open.
 484                  */
 485                 softc->open_rdonly = (flags & O_RDWR) == O_RDONLY;
 486
 487                 /*
 488                  * The function samount ensures media is loaded and ready.
 489                  * It also does a device RESERVE if the tape isn't yet mounted.
 490                  *
 491                  * If the mount fails and this was a non-blocking open,
 492                  * make this a 'open_pending_mount' action.
 493                  */
 494                 error = samount(periph, flags, dev);
 495                 if (error && (flags & O_NONBLOCK)) {
 496                         softc->flags |= SA_FLAG_OPEN;
 497                         softc->open_pending_mount = 1;
 498                         cam_periph_unhold(periph);
 499                         cam_periph_unlock(periph);
 500                         return (0);
 501                 }
 502         }
 503
 504         if (error) {
 505                 cam_periph_unhold(periph);
 506                 cam_periph_unlock(periph);
 507                 cam_periph_release(periph);
 508                 return (error);
 509         }
 510
 511         saprevent(periph, PR_PREVENT);
 512         softc->flags |= SA_FLAG_OPEN;
 513
 514         cam_periph_unhold(periph);
 515         cam_periph_unlock(periph);
 516         return (error);
 517 }
 518
 519 static int
 520 saclose(struct cdev *dev, int flag, int fmt, struct thread *td)
 521 {
 522         struct  cam_periph *periph;
 523         struct  sa_softc *softc;
 524         int     unit, mode, error, writing, tmp;
 525         int     closedbits = SA_FLAG_OPEN;
 526
 527         unit = SAUNIT(dev);
 528         mode = SAMODE(dev);
 529         periph = (struct cam_periph *)dev->si_drv1;
 530         if (periph == NULL)
 531                 return (ENXIO);
 532
 533         cam_periph_lock(periph);
 534
 535         softc = (struct sa_softc *)periph->softc;
 536
 537         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE|CAM_DEBUG_INFO,
 538             ("saclose(%d): dev=0x%x softc=0x%x\n", unit, unit, softc->flags));
 539
 540
 541         softc->open_rdonly = 0;
 542         if (SA_IS_CTRL(dev)) {
 543                 softc->ctrl_mode = 0;
 544                 cam_periph_unlock(periph);
 545                 cam_periph_release(periph);
 546                 return (0);
 547         }
 548
 549         if (softc->open_pending_mount) {
 550                 softc->flags &= ~SA_FLAG_OPEN;
 551                 softc->open_pending_mount = 0;
 552                 cam_periph_unlock(periph);
 553                 cam_periph_release(periph);
 554                 return (0);
 555         }
 556
 557         if ((error = cam_periph_hold(periph, PRIBIO)) != 0) {
 558                 cam_periph_unlock(periph);
 559                 return (error);
 560         }
 561
 562         /*
 563          * Were we writing the tape?
 564          */
 565         writing = (softc->flags & SA_FLAG_TAPE_WRITTEN) != 0;
 566
 567         /*
 568          * See whether or not we need to write filemarks. If this
 569          * fails, we probably have to assume we've lost tape
 570          * position.
 571          */
 572         error = sacheckeod(periph);
 573         if (error) {
 574                 xpt_print(periph->path,
 575                     "failed to write terminating filemark(s)\n");
 576                 softc->flags |= SA_FLAG_TAPE_FROZEN;
 577         }
 578
 579         /*
 580          * Whatever we end up doing, allow users to eject tapes from here on.
 581          */
 582         saprevent(periph, PR_ALLOW);
 583
 584         /*
 585          * Decide how to end...
 586          */
 587         if ((softc->flags & SA_FLAG_TAPE_MOUNTED) == 0) {
 588                 closedbits |= SA_FLAG_TAPE_FROZEN;
 589         } else switch (mode) {
 590         case SA_MODE_OFFLINE:
 591                 /*
 592                  * An 'offline' close is an unconditional release of
 593                  * frozen && mount conditions, irrespective of whether
 594                  * these operations succeeded. The reason for this is
 595                  * to allow at least some kind of programmatic way
 596                  * around our state getting all fouled up. If somebody
 597                  * issues an 'offline' command, that will be allowed
 598                  * to clear state.
 599                  */
 600                 (void) sarewind(periph);
 601                 (void) saloadunload(periph, FALSE);
 602                 closedbits |= SA_FLAG_TAPE_MOUNTED|SA_FLAG_TAPE_FROZEN;
 603                 break;
 604         case SA_MODE_REWIND:
 605                 /*
 606                  * If the rewind fails, return an error- if anyone cares,
 607                  * but not overwriting any previous error.
 608                  *
 609                  * We don't clear the notion of mounted here, but we do
 610                  * clear the notion of frozen if we successfully rewound.
 611                  */
 612                 tmp = sarewind(periph);
 613                 if (tmp) {
 614                         if (error != 0)
 615                                 error = tmp;
 616                 } else {
 617                         closedbits |= SA_FLAG_TAPE_FROZEN;
 618                 }
 619                 break;
 620         case SA_MODE_NOREWIND:
 621                 /*
 622                  * If we're not rewinding/unloading the tape, find out
 623                  * whether we need to back up over one of two filemarks
 624                  * we wrote (if we wrote two filemarks) so that appends
 625                  * from this point on will be sane.
 626                  */
 627                 if (error == 0 && writing && (softc->quirks & SA_QUIRK_2FM)) {
 628                         tmp = saspace(periph, -1, SS_FILEMARKS);
 629                         if (tmp) {
 630                                 xpt_print(periph->path, "unable to backspace "
 631                                     "over one of double filemarks at end of "
 632                                     "tape\n");
 633                                 xpt_print(periph->path, "it is possible that "
 634                                     "this device needs a SA_QUIRK_1FM quirk set"
 635                                     "for it\n");
 636                                 softc->flags |= SA_FLAG_TAPE_FROZEN;
 637                         }
 638                 }
 639                 break;
 640         default:
 641                 xpt_print(periph->path, "unknown mode 0x%x in saclose\n", mode);
 642                 /* NOTREACHED */
 643                 break;
 644         }
 645
 646         /*
 647          * We wish to note here that there are no more filemarks to be written.
 648          */
 649         softc->filemarks = 0;
 650         softc->flags &= ~SA_FLAG_TAPE_WRITTEN;
 651
 652         /*
 653          * And we are no longer open for business.
 654          */
 655         softc->flags &= ~closedbits;
 656
 657         /*
 658          * Inform users if tape state if frozen....
 659          */
 660         if (softc->flags & SA_FLAG_TAPE_FROZEN) {
 661                 xpt_print(periph->path, "tape is now frozen- use an OFFLINE, "
 662                     "REWIND or MTEOM command to clear this state.\n");
 663         }
 664
 665         /* release the device if it is no longer mounted */
 666         if ((softc->flags & SA_FLAG_TAPE_MOUNTED) == 0)
 667                 sareservereleaseunit(periph, FALSE);
 668
 669         cam_periph_unhold(periph);
 670         cam_periph_unlock(periph);
 671         cam_periph_release(periph);
 672
 673         return (error);
 674 }
 675
 676 /*
 677  * Actually translate the requested transfer into one the physical driver
 678  * can understand.  The transfer is described by a buf and will include
 679  * only one physical transfer.
 680  */
 681 static void
 682 sastrategy(struct bio *bp)
 683 {
 684         struct cam_periph *periph;
 685         struct sa_softc *softc;
 686
 687         bp->bio_resid = bp->bio_bcount;
 688         if (SA_IS_CTRL(bp->bio_dev)) {
 689                 biofinish(bp, NULL, EINVAL);
 690                 return;
 691         }
 692         periph = (struct cam_periph *)bp->bio_dev->si_drv1;
 693         if (periph == NULL) {
 694                 biofinish(bp, NULL, ENXIO);
 695                 return;
 696         }
 697         cam_periph_lock(periph);
 698
 699         softc = (struct sa_softc *)periph->softc;
 700
 701         if (softc->flags & SA_FLAG_INVALID) {
 702                 cam_periph_unlock(periph);
 703                 biofinish(bp, NULL, ENXIO);
 704                 return;
 705         }
 706
 707         if (softc->flags & SA_FLAG_TAPE_FROZEN) {
 708                 cam_periph_unlock(periph);
 709                 biofinish(bp, NULL, EPERM);
 710                 return;
 711         }
 712
 713         /*
 714          * This should actually never occur as the write(2)
 715          * system call traps attempts to write to a read-only
 716          * file descriptor.
 717          */
 718         if (bp->bio_cmd == BIO_WRITE && softc->open_rdonly) {
 719                 cam_periph_unlock(periph);
 720                 biofinish(bp, NULL, EBADF);
 721                 return;
 722         }
 723
 724         if (softc->open_pending_mount) {
 725                 int error = samount(periph, 0, bp->bio_dev);
 726                 if (error) {
 727                         cam_periph_unlock(periph);
 728                         biofinish(bp, NULL, ENXIO);
 729                         return;
 730                 }
 731                 saprevent(periph, PR_PREVENT);
 732                 softc->open_pending_mount = 0;
 733         }
 734
 735
 736         /*
 737          * If it's a null transfer, return immediately
 738          */
 739         if (bp->bio_bcount == 0) {
 740                 cam_periph_unlock(periph);
 741                 biodone(bp);
 742                 return;
 743         }
 744
 745         /* valid request?  */
 746         if (softc->flags & SA_FLAG_FIXED) {
 747                 /*
 748                  * Fixed block device.  The byte count must
 749                  * be a multiple of our block size.
 750                  */
 751                 if (((softc->blk_mask != ~0) &&
 752                     ((bp->bio_bcount & softc->blk_mask) != 0)) ||
 753                     ((softc->blk_mask == ~0) &&
 754                     ((bp->bio_bcount % softc->min_blk) != 0))) {
 755                         xpt_print(periph->path, "Invalid request.  Fixed block "
 756                             "device requests must be a multiple of %d bytes\n",
 757                             softc->min_blk);
 758                         cam_periph_unlock(periph);
 759                         biofinish(bp, NULL, EINVAL);
 760                         return;
 761                 }
 762         } else if ((bp->bio_bcount > softc->max_blk) ||
 763                    (bp->bio_bcount < softc->min_blk) ||
 764                    (bp->bio_bcount & softc->blk_mask) != 0) {
 765
 766                 xpt_print_path(periph->path);
 767                 printf("Invalid request.  Variable block "
 768                     "device requests must be ");
 769                 if (softc->blk_mask != 0) {
 770                         printf("a multiple of %d ", (0x1 << softc->blk_gran));
 771                 }
 772                 printf("between %d and %d bytes\n", softc->min_blk,
 773                     softc->max_blk);
 774                 cam_periph_unlock(periph);
 775                 biofinish(bp, NULL, EINVAL);
 776                 return;
 777         }
 778
 779         /*
 780          * Place it at the end of the queue.
 781          */
 782         bioq_insert_tail(&softc->bio_queue, bp);
 783         softc->queue_count++;
 784 #if     0
 785         CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
 786             ("sastrategy: queuing a %ld %s byte %s\n", bp->bio_bcount,
 787             (softc->flags & SA_FLAG_FIXED)?  "fixed" : "variable",
 788             (bp->bio_cmd == BIO_READ)? "read" : "write"));
 789 #endif
 790         if (softc->queue_count > 1) {
 791                 CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
 792                     ("sastrategy: queue count now %d\n", softc->queue_count));
 793         }
 794
 795         /*
 796          * Schedule ourselves for performing the work.
 797          */
 798         xpt_schedule(periph, 1);
 799         cam_periph_unlock(periph);
 800
 801         return;
 802 }
 803
 804
 805 #define PENDING_MOUNT_CHECK(softc, periph, dev)         \
 806         if (softc->open_pending_mount) {                \
 807                 error = samount(periph, 0, dev);        \
 808                 if (error) {                            \
 809                         break;                          \
 810                 }                                       \
 811                 saprevent(periph, PR_PREVENT);          \
 812                 softc->open_pending_mount = 0;          \
 813         }
 814
 815 static int
 816 saioctl(struct cdev *dev, u_long cmd, caddr_t arg, int flag, struct thread *td)
 817 {
 818         struct cam_periph *periph;
 819         struct sa_softc *softc;
 820         scsi_space_code spaceop;
 821         int didlockperiph = 0;
 822         int mode;
 823         int error = 0;
 824
 825         mode = SAMODE(dev);
 826         error = 0;              /* shut up gcc */
 827         spaceop = 0;            /* shut up gcc */
 828
 829         periph = (struct cam_periph *)dev->si_drv1;
 830         if (periph == NULL)
 831                 return (ENXIO);
 832
 833         cam_periph_lock(periph);
 834         softc = (struct sa_softc *)periph->softc;
 835
 836         /*
 837          * Check for control mode accesses. We allow MTIOCGET and
 838          * MTIOCERRSTAT (but need to be the only one open in order
 839          * to clear latched status), and MTSETBSIZE, MTSETDNSTY
 840          * and MTCOMP (but need to be the only one accessing this
 841          * device to run those).
 842          */
 843
 844         if (SA_IS_CTRL(dev)) {
 845                 switch (cmd) {
 846                 case MTIOCGETEOTMODEL:
 847                 case MTIOCGET:
 848                         break;
 849                 case MTIOCERRSTAT:
 850                         /*
 851                          * If the periph isn't already locked, lock it
 852                          * so our MTIOCERRSTAT can reset latched error stats.
 853                          *
 854                          * If the periph is already locked, skip it because
 855                          * we're just getting status and it'll be up to the
 856                          * other thread that has this device open to do
 857                          * an MTIOCERRSTAT that would clear latched status.
 858                          */
 859                         if ((periph->flags & CAM_PERIPH_LOCKED) == 0) {
 860                                 error = cam_periph_hold(periph, PRIBIO|PCATCH);
 861                                  if (error != 0)
 862                                         return (error);
 863                                 didlockperiph = 1;
 864                         }
 865                         break;
 866
 867                 case MTIOCTOP:
 868                 {
 869                         struct mtop *mt = (struct mtop *) arg;
 870
 871                         /*
 872                          * Check to make sure it's an OP we can perform
 873                          * with no media inserted.
 874                          */
 875                         switch (mt->mt_op) {
 876                         case MTSETBSIZ:
 877                         case MTSETDNSTY:
 878                         case MTCOMP:
 879                                 mt = NULL;
 880                                 /* FALLTHROUGH */
 881                         default:
 882                                 break;
 883                         }
 884                         if (mt != NULL) {
 885                                 break;
 886                         }
 887                         /* FALLTHROUGH */
 888                 }
 889                 case MTIOCSETEOTMODEL:
 890                         /*
 891                          * We need to acquire the peripheral here rather
 892                          * than at open time because we are sharing writable
 893                          * access to data structures.
 894                          */
 895                         error = cam_periph_hold(periph, PRIBIO|PCATCH);
 896                         if (error != 0)
 897                                 return (error);
 898                         didlockperiph = 1;
 899                         break;
 900
 901                 default:
 902                         return (EINVAL);
 903                 }
 904         }
 905
 906         /*
 907          * Find the device that the user is talking about
 908          */
 909         switch (cmd) {
 910         case MTIOCGET:
 911         {
 912                 struct mtget *g = (struct mtget *)arg;
 913
 914                 /*
 915                  * If this isn't the control mode device, actually go out
 916                  * and ask the drive again what it's set to.
 917                  */
 918                 if (!SA_IS_CTRL(dev) && !softc->open_pending_mount) {
 919                         u_int8_t write_protect;
 920                         int comp_enabled, comp_supported;
 921                         error = sagetparams(periph, SA_PARAM_ALL,
 922                             &softc->media_blksize, &softc->media_density,
 923                             &softc->media_numblks, &softc->buffer_mode,
 924                             &write_protect, &softc->speed, &comp_supported,
 925                             &comp_enabled, &softc->comp_algorithm, NULL);
 926                         if (error)
 927                                 break;
 928                         if (write_protect)
 929                                 softc->flags |= SA_FLAG_TAPE_WP;
 930                         else
 931                                 softc->flags &= ~SA_FLAG_TAPE_WP;
 932                         softc->flags &= ~(SA_FLAG_COMP_SUPP|
 933                             SA_FLAG_COMP_ENABLED|SA_FLAG_COMP_UNSUPP);
 934                         if (comp_supported) {
 935                                 if (softc->saved_comp_algorithm == 0)
 936                                         softc->saved_comp_algorithm =
 937                                             softc->comp_algorithm;
 938                                 softc->flags |= SA_FLAG_COMP_SUPP;
 939                                 if (comp_enabled)
 940                                         softc->flags |= SA_FLAG_COMP_ENABLED;
 941                         } else
 942                                 softc->flags |= SA_FLAG_COMP_UNSUPP;
 943                 }
 944                 bzero(g, sizeof(struct mtget));
 945                 g->mt_type = MT_ISAR;
 946                 if (softc->flags & SA_FLAG_COMP_UNSUPP) {
 947                         g->mt_comp = MT_COMP_UNSUPP;
 948                         g->mt_comp0 = MT_COMP_UNSUPP;
 949                         g->mt_comp1 = MT_COMP_UNSUPP;
 950                         g->mt_comp2 = MT_COMP_UNSUPP;
 951                         g->mt_comp3 = MT_COMP_UNSUPP;
 952                 } else {
 953                         if ((softc->flags & SA_FLAG_COMP_ENABLED) == 0) {
 954                                 g->mt_comp = MT_COMP_DISABLED;
 955                         } else {
 956                                 g->mt_comp = softc->comp_algorithm;
 957                         }
 958                         g->mt_comp0 = softc->comp_algorithm;
 959                         g->mt_comp1 = softc->comp_algorithm;
 960                         g->mt_comp2 = softc->comp_algorithm;
 961                         g->mt_comp3 = softc->comp_algorithm;
 962                 }
 963                 g->mt_density = softc->media_density;
 964                 g->mt_density0 = softc->media_density;
 965                 g->mt_density1 = softc->media_density;
 966                 g->mt_density2 = softc->media_density;
 967                 g->mt_density3 = softc->media_density;
 968                 g->mt_blksiz = softc->media_blksize;
 969                 g->mt_blksiz0 = softc->media_blksize;
 970                 g->mt_blksiz1 = softc->media_blksize;
 971                 g->mt_blksiz2 = softc->media_blksize;
 972                 g->mt_blksiz3 = softc->media_blksize;
 973                 g->mt_fileno = softc->fileno;
 974                 g->mt_blkno = softc->blkno;
 975                 g->mt_dsreg = (short) softc->dsreg;
 976                 /*
 977                  * Yes, we know that this is likely to overflow
 978                  */
 979                 if (softc->last_resid_was_io) {
 980                         if ((g->mt_resid = (short) softc->last_io_resid) != 0) {
 981                                 if (SA_IS_CTRL(dev) == 0 || didlockperiph) {
 982                                         softc->last_io_resid = 0;
 983                                 }
 984                         }
 985                 } else {
 986                         if ((g->mt_resid = (short)softc->last_ctl_resid) != 0) {
 987                                 if (SA_IS_CTRL(dev) == 0 || didlockperiph) {
 988                                         softc->last_ctl_resid = 0;
 989                                 }
 990                         }
 991                 }
 992                 error = 0;
 993                 break;
 994         }
 995         case MTIOCERRSTAT:
 996         {
 997                 struct scsi_tape_errors *sep =
 998                     &((union mterrstat *)arg)->scsi_errstat;
 999
1000                 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
1001                     ("saioctl: MTIOCERRSTAT\n"));
1002
1003                 bzero(sep, sizeof(*sep));
1004                 sep->io_resid = softc->last_io_resid;
1005                 bcopy((caddr_t) &softc->last_io_sense, sep->io_sense,
1006                     sizeof (sep->io_sense));
1007                 bcopy((caddr_t) &softc->last_io_cdb, sep->io_cdb,
1008                     sizeof (sep->io_cdb));
1009                 sep->ctl_resid = softc->last_ctl_resid;
1010                 bcopy((caddr_t) &softc->last_ctl_sense, sep->ctl_sense,
1011                     sizeof (sep->ctl_sense));
1012                 bcopy((caddr_t) &softc->last_ctl_cdb, sep->ctl_cdb,
1013                     sizeof (sep->ctl_cdb));
1014
1015                 if ((SA_IS_CTRL(dev) == 0 && softc->open_pending_mount) ||
1016                     didlockperiph)
1017                         bzero((caddr_t) &softc->errinfo,
1018                             sizeof (softc->errinfo));
1019                 error = 0;
1020                 break;
1021         }
1022         case MTIOCTOP:
1023         {
1024                 struct mtop *mt;
1025                 int    count;
1026
1027                 PENDING_MOUNT_CHECK(softc, periph, dev);
1028
1029                 mt = (struct mtop *)arg;
1030
1031
1032                 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
1033                          ("saioctl: op=0x%x count=0x%x\n",
1034                           mt->mt_op, mt->mt_count));
1035
1036                 count = mt->mt_count;
1037                 switch (mt->mt_op) {
1038                 case MTWEOF:    /* write an end-of-file marker */
1039                         /*
1040                          * We don't need to clear the SA_FLAG_TAPE_WRITTEN
1041                          * flag because by keeping track of filemarks
1042                          * we have last written we know ehether or not
1043                          * we need to write more when we close the device.
1044                          */
1045                         error = sawritefilemarks(periph, count, FALSE);
1046                         break;
1047                 case MTWSS:     /* write a setmark */
1048                         error = sawritefilemarks(periph, count, TRUE);
1049                         break;
1050                 case MTBSR:     /* backward space record */
1051                 case MTFSR:     /* forward space record */
1052                 case MTBSF:     /* backward space file */
1053                 case MTFSF:     /* forward space file */
1054                 case MTBSS:     /* backward space setmark */
1055                 case MTFSS:     /* forward space setmark */
1056                 case MTEOD:     /* space to end of recorded medium */
1057                 {
1058                         int nmarks;
1059
1060                         spaceop = SS_FILEMARKS;
1061                         nmarks = softc->filemarks;
1062                         error = sacheckeod(periph);
1063                         if (error) {
1064                                 xpt_print(periph->path,
1065                                     "EOD check prior to spacing failed\n");
1066                                 softc->flags |= SA_FLAG_EIO_PENDING;
1067                                 break;
1068                         }
1069                         nmarks -= softc->filemarks;
1070                         switch(mt->mt_op) {
1071                         case MTBSR:
1072                                 count = -count;
1073                                 /* FALLTHROUGH */
1074                         case MTFSR:
1075                                 spaceop = SS_BLOCKS;
1076                                 break;
1077                         case MTBSF:
1078                                 count = -count;
1079                                 /* FALLTHROUGH */
1080                         case MTFSF:
1081                                 break;
1082                         case MTBSS:
1083                                 count = -count;
1084                                 /* FALLTHROUGH */
1085                         case MTFSS:
1086                                 spaceop = SS_SETMARKS;
1087                                 break;
1088                         case MTEOD:
1089                                 spaceop = SS_EOD;
1090                                 count = 0;
1091                                 nmarks = 0;
1092                                 break;
1093                         default:
1094                                 error = EINVAL;
1095                                 break;
1096                         }
1097                         if (error)
1098                                 break;
1099
1100                         nmarks = softc->filemarks;
1101                         /*
1102                          * XXX: Why are we checking again?
1103                          */
1104                         error = sacheckeod(periph);
1105                         if (error)
1106                                 break;
1107                         nmarks -= softc->filemarks;
1108                         error = saspace(periph, count - nmarks, spaceop);
1109                         /*
1110                          * At this point, clear that we've written the tape
1111                          * and that we've written any filemarks. We really
1112                          * don't know what the applications wishes to do next-
1113                          * the sacheckeod's will make sure we terminated the
1114                          * tape correctly if we'd been writing, but the next
1115                          * action the user application takes will set again
1116                          * whether we need to write filemarks.
1117                          */
1118                         softc->flags &=
1119                             ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
1120                         softc->filemarks = 0;
1121                         break;
1122                 }
1123                 case MTREW:     /* rewind */
1124                         PENDING_MOUNT_CHECK(softc, periph, dev);
1125                         (void) sacheckeod(periph);
1126                         error = sarewind(periph);
1127                         /* see above */
1128                         softc->flags &=
1129                             ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
1130                         softc->flags &= ~SA_FLAG_ERR_PENDING;
1131                         softc->filemarks = 0;
1132                         break;
1133                 case MTERASE:   /* erase */
1134                         PENDING_MOUNT_CHECK(softc, periph, dev);
1135                         error = saerase(periph, count);
1136                         softc->flags &=
1137                             ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
1138                         softc->flags &= ~SA_FLAG_ERR_PENDING;
1139                         break;
1140                 case MTRETENS:  /* re-tension tape */
1141                         PENDING_MOUNT_CHECK(softc, periph, dev);
1142                         error = saretension(periph);
1143                         softc->flags &=
1144                             ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
1145                         softc->flags &= ~SA_FLAG_ERR_PENDING;
1146                         break;
1147                 case MTOFFL:    /* rewind and put the drive offline */
1148
1149                         PENDING_MOUNT_CHECK(softc, periph, dev);
1150
1151                         (void) sacheckeod(periph);
1152                         /* see above */
1153                         softc->flags &= ~SA_FLAG_TAPE_WRITTEN;
1154                         softc->filemarks = 0;
1155
1156                         error = sarewind(periph);
1157                         /* clear the frozen flag anyway */
1158                         softc->flags &= ~SA_FLAG_TAPE_FROZEN;
1159
1160                         /*
1161                          * Be sure to allow media removal before ejecting.
1162                          */
1163
1164                         saprevent(periph, PR_ALLOW);
1165                         if (error == 0) {
1166                                 error = saloadunload(periph, FALSE);
1167                                 if (error == 0) {
1168                                         softc->flags &= ~SA_FLAG_TAPE_MOUNTED;
1169                                 }
1170                         }
1171                         break;
1172
1173                 case MTNOP:     /* no operation, sets status only */
1174                 case MTCACHE:   /* enable controller cache */
1175                 case MTNOCACHE: /* disable controller cache */
1176                         error = 0;
1177                         break;
1178
1179                 case MTSETBSIZ: /* Set block size for device */
1180
1181                         PENDING_MOUNT_CHECK(softc, periph, dev);
1182
1183                         error = sasetparams(periph, SA_PARAM_BLOCKSIZE, count,
1184                                             0, 0, 0);
1185                         if (error == 0) {
1186                                 softc->last_media_blksize =
1187                                     softc->media_blksize;
1188                                 softc->media_blksize = count;
1189                                 if (count) {
1190                                         softc->flags |= SA_FLAG_FIXED;
1191                                         if (powerof2(count)) {
1192                                                 softc->blk_shift =
1193                                                     ffs(count) - 1;
1194                                                 softc->blk_mask = count - 1;
1195                                         } else {
1196                                                 softc->blk_mask = ~0;
1197                                                 softc->blk_shift = 0;
1198                                         }
1199                                         /*
1200                                          * Make the user's desire 'persistent'.
1201                                          */
1202                                         softc->quirks &= ~SA_QUIRK_VARIABLE;
1203                                         softc->quirks |= SA_QUIRK_FIXED;
1204                                 } else {
1205                                         softc->flags &= ~SA_FLAG_FIXED;
1206                                         if (softc->max_blk == 0) {
1207                                                 softc->max_blk = ~0;
1208                                         }
1209                                         softc->blk_shift = 0;
1210                                         if (softc->blk_gran != 0) {
1211                                                 softc->blk_mask =
1212                                                     softc->blk_gran - 1;
1213                                         } else {
1214                                                 softc->blk_mask = 0;
1215                                         }
1216                                         /*
1217                                          * Make the user's desire 'persistent'.
1218                                          */
1219                                         softc->quirks |= SA_QUIRK_VARIABLE;
1220                                         softc->quirks &= ~SA_QUIRK_FIXED;
1221                                 }
1222                         }
1223                         break;
1224                 case MTSETDNSTY:        /* Set density for device and mode */
1225                         PENDING_MOUNT_CHECK(softc, periph, dev);
1226
1227                         if (count > UCHAR_MAX) {
1228                                 error = EINVAL;
1229                                 break;
1230                         } else {
1231                                 error = sasetparams(periph, SA_PARAM_DENSITY,
1232                                                     0, count, 0, 0);
1233                         }
1234                         break;
1235                 case MTCOMP:    /* enable compression */
1236                         PENDING_MOUNT_CHECK(softc, periph, dev);
1237                         /*
1238                          * Some devices don't support compression, and
1239                          * don't like it if you ask them for the
1240                          * compression page.
1241                          */
1242                         if ((softc->quirks & SA_QUIRK_NOCOMP) ||
1243                             (softc->flags & SA_FLAG_COMP_UNSUPP)) {
1244                                 error = ENODEV;
1245                                 break;
1246                         }
1247                         error = sasetparams(periph, SA_PARAM_COMPRESSION,
1248                             0, 0, count, SF_NO_PRINT);
1249                         break;
1250                 default:
1251                         error = EINVAL;
1252                 }
1253                 break;
1254         }
1255         case MTIOCIEOT:
1256         case MTIOCEEOT:
1257                 error = 0;
1258                 break;
1259         case MTIOCRDSPOS:
1260                 PENDING_MOUNT_CHECK(softc, periph, dev);
1261                 error = sardpos(periph, 0, (u_int32_t *) arg);
1262                 break;
1263         case MTIOCRDHPOS:
1264                 PENDING_MOUNT_CHECK(softc, periph, dev);
1265                 error = sardpos(periph, 1, (u_int32_t *) arg);
1266                 break;
1267         case MTIOCSLOCATE:
1268                 PENDING_MOUNT_CHECK(softc, periph, dev);
1269                 error = sasetpos(periph, 0, (u_int32_t *) arg);
1270                 break;
1271         case MTIOCHLOCATE:
1272                 PENDING_MOUNT_CHECK(softc, periph, dev);
1273                 error = sasetpos(periph, 1, (u_int32_t *) arg);
1274                 break;
1275         case MTIOCGETEOTMODEL:
1276                 error = 0;
1277                 if (softc->quirks & SA_QUIRK_1FM)
1278                         mode = 1;
1279                 else
1280                         mode = 2;
1281                 *((u_int32_t *) arg) = mode;
1282                 break;
1283         case MTIOCSETEOTMODEL:
1284                 error = 0;
1285                 switch (*((u_int32_t *) arg)) {
1286                 case 1:
1287                         softc->quirks &= ~SA_QUIRK_2FM;
1288                         softc->quirks |= SA_QUIRK_1FM;
1289                         break;
1290                 case 2:
1291                         softc->quirks &= ~SA_QUIRK_1FM;
1292                         softc->quirks |= SA_QUIRK_2FM;
1293                         break;
1294                 default:
1295                         error = EINVAL;
1296                         break;
1297                 }
1298                 break;
1299         default:
1300                 error = cam_periph_ioctl(periph, cmd, arg, saerror);
1301                 break;
1302         }
1303
1304         /*
1305          * Check to see if we cleared a frozen state
1306          */
1307         if (error == 0 && (softc->flags & SA_FLAG_TAPE_FROZEN)) {
1308                 switch(cmd) {
1309                 case MTIOCRDSPOS:
1310                 case MTIOCRDHPOS:
1311                 case MTIOCSLOCATE:
1312                 case MTIOCHLOCATE:
1313                         softc->fileno = (daddr_t) -1;
1314                         softc->blkno = (daddr_t) -1;
1315                         softc->flags &= ~SA_FLAG_TAPE_FROZEN;
1316                         xpt_print(periph->path,
1317                             "tape state now unfrozen.\n");
1318                         break;
1319                 default:
1320                         break;
1321                 }
1322         }
1323         if (didlockperiph) {
1324                 cam_periph_unhold(periph);
1325         }
1326         cam_periph_unlock(periph);
1327         return (error);
1328 }
1329
1330 static void
1331 sainit(void)
1332 {
1333         cam_status status;
1334
1335         /*
1336          * Install a global async callback.
1337          */
1338         status = xpt_register_async(AC_FOUND_DEVICE, saasync, NULL, NULL);
1339
1340         if (status != CAM_REQ_CMP) {
1341                 printf("sa: Failed to attach master async callback "
1342                        "due to status 0x%x!\n", status);
1343         }
1344 }
1345
1346 static void
1347 saoninvalidate(struct cam_periph *periph)
1348 {
1349         struct sa_softc *softc;
1350
1351         softc = (struct sa_softc *)periph->softc;
1352
1353         /*
1354          * De-register any async callbacks.
1355          */
1356         xpt_register_async(0, saasync, periph, periph->path);
1357
1358         softc->flags |= SA_FLAG_INVALID;
1359
1360         /*
1361          * Return all queued I/O with ENXIO.
1362          * XXX Handle any transactions queued to the card
1363          *     with XPT_ABORT_CCB.
1364          */
1365         bioq_flush(&softc->bio_queue, NULL, ENXIO);
1366         softc->queue_count = 0;
1367
1368         xpt_print(periph->path, "lost device\n");
1369
1370 }
1371
1372 static void
1373 sacleanup(struct cam_periph *periph)
1374 {
1375         struct sa_softc *softc;
1376         int i;
1377
1378         softc = (struct sa_softc *)periph->softc;
1379
1380         devstat_remove_entry(softc->device_stats);
1381
1382         destroy_dev(softc->devs.ctl_dev);
1383
1384         for (i = 0; i < SA_NUM_MODES; i++) {
1385                 destroy_dev(softc->devs.mode_devs[i].r_dev);
1386                 destroy_dev(softc->devs.mode_devs[i].nr_dev);
1387                 destroy_dev(softc->devs.mode_devs[i].er_dev);
1388         }
1389
1390         xpt_print(periph->path, "removing device entry\n");
1391         free(softc, M_SCSISA);
1392 }
1393
1394 static void
1395 saasync(void *callback_arg, u_int32_t code,
1396         struct cam_path *path, void *arg)
1397 {
1398         struct cam_periph *periph;
1399
1400         periph = (struct cam_periph *)callback_arg;
1401         switch (code) {
1402         case AC_FOUND_DEVICE:
1403         {
1404                 struct ccb_getdev *cgd;
1405                 cam_status status;
1406
1407                 cgd = (struct ccb_getdev *)arg;
1408                 if (cgd == NULL)
1409                         break;
1410
1411                 if (SID_TYPE(&cgd->inq_data) != T_SEQUENTIAL)
1412                         break;
1413
1414                 /*
1415                  * Allocate a peripheral instance for
1416                  * this device and start the probe
1417                  * process.
1418                  */
1419                 status = cam_periph_alloc(saregister, saoninvalidate,
1420                                           sacleanup, sastart,
1421                                           "sa", CAM_PERIPH_BIO, cgd->ccb_h.path,
1422                                           saasync, AC_FOUND_DEVICE, cgd);
1423
1424                 if (status != CAM_REQ_CMP
1425                  && status != CAM_REQ_INPROG)
1426                         printf("saasync: Unable to probe new device "
1427                                 "due to status 0x%x\n", status);
1428                 break;
1429         }
1430         default:
1431                 cam_periph_async(periph, code, path, arg);
1432                 break;
1433         }
1434 }
1435
1436 static cam_status
1437 saregister(struct cam_periph *periph, void *arg)
1438 {
1439         struct sa_softc *softc;
1440         struct ccb_getdev *cgd;
1441         caddr_t match;
1442         int i;
1443
1444         cgd = (struct ccb_getdev *)arg;
1445         if (periph == NULL) {
1446                 printf("saregister: periph was NULL!!\n");
1447                 return (CAM_REQ_CMP_ERR);
1448         }
1449
1450         if (cgd == NULL) {
1451                 printf("saregister: no getdev CCB, can't register device\n");
1452                 return (CAM_REQ_CMP_ERR);
1453         }
1454
1455         softc = (struct sa_softc *)
1456             malloc(sizeof (*softc), M_SCSISA, M_NOWAIT | M_ZERO);
1457         if (softc == NULL) {
1458                 printf("saregister: Unable to probe new device. "
1459                        "Unable to allocate softc\n");
1460                 return (CAM_REQ_CMP_ERR);
1461         }
1462         softc->scsi_rev = SID_ANSI_REV(&cgd->inq_data);
1463         softc->state = SA_STATE_NORMAL;
1464         softc->fileno = (daddr_t) -1;
1465         softc->blkno = (daddr_t) -1;
1466
1467         bioq_init(&softc->bio_queue);
1468         periph->softc = softc;
1469
1470         /*
1471          * See if this device has any quirks.
1472          */
1473         match = cam_quirkmatch((caddr_t)&cgd->inq_data,
1474                                (caddr_t)sa_quirk_table,
1475                                sizeof(sa_quirk_table)/sizeof(*sa_quirk_table),
1476                                sizeof(*sa_quirk_table), scsi_inquiry_match);
1477
1478         if (match != NULL) {
1479                 softc->quirks = ((struct sa_quirk_entry *)match)->quirks;
1480                 softc->last_media_blksize =
1481                     ((struct sa_quirk_entry *)match)->prefblk;
1482 #ifdef  CAMDEBUG
1483                 xpt_print(periph->path, "found quirk entry %d\n",
1484                     (int) (((struct sa_quirk_entry *) match) - sa_quirk_table));
1485 #endif
1486         } else
1487                 softc->quirks = SA_QUIRK_NONE;
1488
1489         /*
1490          * The SA driver supports a blocksize, but we don't know the
1491          * blocksize until we media is inserted.  So, set a flag to
1492          * indicate that the blocksize is unavailable right now.
1493          */
1494         cam_periph_unlock(periph);
1495         softc->device_stats = devstat_new_entry("sa", periph->unit_number, 0,
1496             DEVSTAT_BS_UNAVAILABLE, SID_TYPE(&cgd->inq_data) |
1497             DEVSTAT_TYPE_IF_SCSI, DEVSTAT_PRIORITY_TAPE);
1498
1499         softc->devs.ctl_dev = make_dev(&sa_cdevsw, SAMINOR(SA_CTLDEV,
1500             periph->unit_number, 0, SA_ATYPE_R), UID_ROOT, GID_OPERATOR,
1501             0660, "%s%d.ctl", periph->periph_name, periph->unit_number);
1502         softc->devs.ctl_dev->si_drv1 = periph;
1503
1504         for (i = 0; i < SA_NUM_MODES; i++) {
1505
1506                 softc->devs.mode_devs[i].r_dev = make_dev(&sa_cdevsw,
1507                     SAMINOR(SA_NOT_CTLDEV, periph->unit_number, i, SA_ATYPE_R),
1508                     UID_ROOT, GID_OPERATOR, 0660, "%s%d.%d",
1509                     periph->periph_name, periph->unit_number, i);
1510                 softc->devs.mode_devs[i].r_dev->si_drv1 = periph;
1511
1512                 softc->devs.mode_devs[i].nr_dev = make_dev(&sa_cdevsw,
1513                     SAMINOR(SA_NOT_CTLDEV, periph->unit_number, i, SA_ATYPE_NR),
1514                     UID_ROOT, GID_OPERATOR, 0660, "n%s%d.%d",
1515                     periph->periph_name, periph->unit_number, i);
1516                 softc->devs.mode_devs[i].nr_dev->si_drv1 = periph;
1517
1518                 softc->devs.mode_devs[i].er_dev = make_dev(&sa_cdevsw,
1519                     SAMINOR(SA_NOT_CTLDEV, periph->unit_number, i, SA_ATYPE_ER),
1520                     UID_ROOT, GID_OPERATOR, 0660, "e%s%d.%d",
1521                     periph->periph_name, periph->unit_number, i);
1522                 softc->devs.mode_devs[i].er_dev->si_drv1 = periph;
1523
1524                 /*
1525                  * Make the (well known) aliases for the first mode.
1526                  */
1527                 if (i == 0) {
1528                         struct cdev *alias;
1529
1530                         alias = make_dev_alias(softc->devs.mode_devs[i].r_dev,
1531                            "%s%d", periph->periph_name, periph->unit_number);
1532                         alias->si_drv1 = periph;
1533                         alias = make_dev_alias(softc->devs.mode_devs[i].nr_dev,
1534                             "n%s%d", periph->periph_name, periph->unit_number);
1535                         alias->si_drv1 = periph;
1536                         alias = make_dev_alias(softc->devs.mode_devs[i].er_dev,
1537                             "e%s%d", periph->periph_name, periph->unit_number);
1538                         alias->si_drv1 = periph;
1539                 }
1540         }
1541         cam_periph_lock(periph);
1542
1543         /*
1544          * Add an async callback so that we get
1545          * notified if this device goes away.
1546          */
1547         xpt_register_async(AC_LOST_DEVICE, saasync, periph, periph->path);
1548
1549         xpt_announce_periph(periph, NULL);
1550
1551         return (CAM_REQ_CMP);
1552 }
1553
1554 static void
1555 sastart(struct cam_periph *periph, union ccb *start_ccb)
1556 {
1557         struct sa_softc *softc;
1558
1559         softc = (struct sa_softc *)periph->softc;
1560
1561         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("sastart\n"));
1562
1563
1564         switch (softc->state) {
1565         case SA_STATE_NORMAL:
1566         {
1567                 /* Pull a buffer from the queue and get going on it */
1568                 struct bio *bp;
1569
1570                 /*
1571                  * See if there is a buf with work for us to do..
1572                  */
1573                 bp = bioq_first(&softc->bio_queue);
1574                 if (periph->immediate_priority <= periph->pinfo.priority) {
1575                         CAM_DEBUG_PRINT(CAM_DEBUG_SUBTRACE,
1576                                         ("queuing for immediate ccb\n"));
1577                         Set_CCB_Type(start_ccb, SA_CCB_WAITING);
1578                         SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
1579                                           periph_links.sle);
1580                         periph->immediate_priority = CAM_PRIORITY_NONE;
1581                         wakeup(&periph->ccb_list);
1582                 } else if (bp == NULL) {
1583                         xpt_release_ccb(start_ccb);
1584                 } else if ((softc->flags & SA_FLAG_ERR_PENDING) != 0) {
1585                         struct bio *done_bp;
1586 again:
1587                         softc->queue_count--;
1588                         bioq_remove(&softc->bio_queue, bp);
1589                         bp->bio_resid = bp->bio_bcount;
1590                         done_bp = bp;
1591                         if ((softc->flags & SA_FLAG_EOM_PENDING) != 0) {
1592                                 /*
1593                                  * We now just clear errors in this case
1594                                  * and let the residual be the notifier.
1595                                  */
1596                                 bp->bio_error = 0;
1597                         } else if ((softc->flags & SA_FLAG_EOF_PENDING) != 0) {
1598                                 /*
1599                                  * This can only happen if we're reading
1600                                  * in fixed length mode. In this case,
1601                                  * we dump the rest of the list the
1602                                  * same way.
1603                                  */
1604                                 bp->bio_error = 0;
1605                                 if (bioq_first(&softc->bio_queue) != NULL) {
1606                                         biodone(done_bp);
1607                                         goto again;
1608                                 }
1609                         } else if ((softc->flags & SA_FLAG_EIO_PENDING) != 0) {
1610                                 bp->bio_error = EIO;
1611                                 bp->bio_flags |= BIO_ERROR;
1612                         }
1613                         bp = bioq_first(&softc->bio_queue);
1614                         /*
1615                          * Only if we have no other buffers queued up
1616                          * do we clear the pending error flag.
1617                          */
1618                         if (bp == NULL)
1619                                 softc->flags &= ~SA_FLAG_ERR_PENDING;
1620                         CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
1621                             ("sastart- ERR_PENDING now 0x%x, bp is %sNULL, "
1622                             "%d more buffers queued up\n",
1623                             (softc->flags & SA_FLAG_ERR_PENDING),
1624                             (bp != NULL)? "not " : " ", softc->queue_count));
1625                         xpt_release_ccb(start_ccb);
1626                         biodone(done_bp);
1627                 } else {
1628                         u_int32_t length;
1629
1630                         bioq_remove(&softc->bio_queue, bp);
1631                         softc->queue_count--;
1632
1633                         if ((softc->flags & SA_FLAG_FIXED) != 0) {
1634                                 if (softc->blk_shift != 0) {
1635                                         length =
1636                                             bp->bio_bcount >> softc->blk_shift;
1637                                 } else if (softc->media_blksize != 0) {
1638                                         length = bp->bio_bcount /
1639                                             softc->media_blksize;
1640                                 } else {
1641                                         bp->bio_error = EIO;
1642                                         xpt_print(periph->path, "zero blocksize"
1643                                             " for FIXED length writes?\n");
1644                                         biodone(bp);
1645                                         break;
1646                                 }
1647 #if     0
1648                                 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_INFO,
1649                                     ("issuing a %d fixed record %s\n",
1650                                     length,  (bp->bio_cmd == BIO_READ)? "read" :
1651                                     "write"));
1652 #endif
1653                         } else {
1654                                 length = bp->bio_bcount;
1655 #if     0
1656                                 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_INFO,
1657                                     ("issuing a %d variable byte %s\n",
1658                                     length,  (bp->bio_cmd == BIO_READ)? "read" :
1659                                     "write"));
1660 #endif
1661                         }
1662                         devstat_start_transaction_bio(softc->device_stats, bp);
1663                         /*
1664                          * Some people have theorized that we should
1665                          * suppress illegal length indication if we are
1666                          * running in variable block mode so that we don't
1667                          * have to request sense every time our requested
1668                          * block size is larger than the written block.
1669                          * The residual information from the ccb allows
1670                          * us to identify this situation anyway.  The only
1671                          * problem with this is that we will not get
1672                          * information about blocks that are larger than
1673                          * our read buffer unless we set the block size
1674                          * in the mode page to something other than 0.
1675                          *
1676                          * I believe that this is a non-issue. If user apps
1677                          * don't adjust their read size to match our record
1678                          * size, that's just life. Anyway, the typical usage
1679                          * would be to issue, e.g., 64KB reads and occasionally
1680                          * have to do deal with 512 byte or 1KB intermediate
1681                          * records.
1682                          */
1683                         softc->dsreg = (bp->bio_cmd == BIO_READ)?
1684                             MTIO_DSREG_RD : MTIO_DSREG_WR;
1685                         scsi_sa_read_write(&start_ccb->csio, 0, sadone,
1686                             MSG_SIMPLE_Q_TAG, (bp->bio_cmd == BIO_READ),
1687                             FALSE, (softc->flags & SA_FLAG_FIXED) != 0,
1688                             length, bp->bio_data, bp->bio_bcount, SSD_FULL_SIZE,
1689                             IO_TIMEOUT);
1690                         start_ccb->ccb_h.ccb_pflags &= ~SA_POSITION_UPDATED;
1691                         Set_CCB_Type(start_ccb, SA_CCB_BUFFER_IO);
1692                         start_ccb->ccb_h.ccb_bp = bp;
1693                         bp = bioq_first(&softc->bio_queue);
1694                         xpt_action(start_ccb);
1695                 }
1696
1697                 if (bp != NULL) {
1698                         /* Have more work to do, so ensure we stay scheduled */
1699                         xpt_schedule(periph, 1);
1700                 }
1701                 break;
1702         }
1703         case SA_STATE_ABNORMAL:
1704         default:
1705                 panic("state 0x%x in sastart", softc->state);
1706                 break;
1707         }
1708 }
1709
1710
1711 static void
1712 sadone(struct cam_periph *periph, union ccb *done_ccb)
1713 {
1714         struct sa_softc *softc;
1715         struct ccb_scsiio *csio;
1716
1717         softc = (struct sa_softc *)periph->softc;
1718         csio = &done_ccb->csio;
1719         switch (CCB_Type(csio)) {
1720         case SA_CCB_BUFFER_IO:
1721         {
1722                 struct bio *bp;
1723                 int error;
1724
1725                 softc->dsreg = MTIO_DSREG_REST;
1726                 bp = (struct bio *)done_ccb->ccb_h.ccb_bp;
1727                 error = 0;
1728                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
1729                         if ((error = saerror(done_ccb, 0, 0)) == ERESTART) {
1730                                 /*
1731                                  * A retry was scheduled, so just return.
1732                                  */
1733                                 return;
1734                         }
1735                 }
1736
1737                 if (error == EIO) {
1738
1739                         /*
1740                          * Catastrophic error. Mark the tape as frozen
1741                          * (we no longer know tape position).
1742                          *
1743                          * Return all queued I/O with EIO, and unfreeze
1744                          * our queue so that future transactions that
1745                          * attempt to fix this problem can get to the
1746                          * device.
1747                          *
1748                          */
1749
1750                         softc->flags |= SA_FLAG_TAPE_FROZEN;
1751                         bioq_flush(&softc->bio_queue, NULL, EIO);
1752                 }
1753                 if (error != 0) {
1754                         bp->bio_resid = bp->bio_bcount;
1755                         bp->bio_error = error;
1756                         bp->bio_flags |= BIO_ERROR;
1757                         /*
1758                          * In the error case, position is updated in saerror.
1759                          */
1760                 } else {
1761                         bp->bio_resid = csio->resid;
1762                         bp->bio_error = 0;
1763                         if (csio->resid != 0) {
1764                                 bp->bio_flags |= BIO_ERROR;
1765                         }
1766                         if (bp->bio_cmd == BIO_WRITE) {
1767                                 softc->flags |= SA_FLAG_TAPE_WRITTEN;
1768                                 softc->filemarks = 0;
1769                         }
1770                         if (!(csio->ccb_h.ccb_pflags & SA_POSITION_UPDATED) &&
1771                             (softc->blkno != (daddr_t) -1)) {
1772                                 if ((softc->flags & SA_FLAG_FIXED) != 0) {
1773                                         u_int32_t l;
1774                                         if (softc->blk_shift != 0) {
1775                                                 l = bp->bio_bcount >>
1776                                                         softc->blk_shift;
1777                                         } else {
1778                                                 l = bp->bio_bcount /
1779                                                         softc->media_blksize;
1780                                         }
1781                                         softc->blkno += (daddr_t) l;
1782                                 } else {
1783                                         softc->blkno++;
1784                                 }
1785                         }
1786                 }
1787                 /*
1788                  * If we had an error (immediate or pending),
1789                  * release the device queue now.
1790                  */
1791                 if (error || (softc->flags & SA_FLAG_ERR_PENDING))
1792                         cam_release_devq(done_ccb->ccb_h.path, 0, 0, 0, 0);
1793 #ifdef  CAMDEBUG
1794                 if (error || bp->bio_resid) {
1795                         CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
1796                                   ("error %d resid %ld count %ld\n", error,
1797                                   bp->bio_resid, bp->bio_bcount));
1798                 }
1799 #endif
1800                 biofinish(bp, softc->device_stats, 0);
1801                 break;
1802         }
1803         case SA_CCB_WAITING:
1804         {
1805                 /* Caller will release the CCB */
1806                 wakeup(&done_ccb->ccb_h.cbfcnp);
1807                 return;
1808         }
1809         }
1810         xpt_release_ccb(done_ccb);
1811 }
1812
1813 /*
1814  * Mount the tape (make sure it's ready for I/O).
1815  */
1816 static int
1817 samount(struct cam_periph *periph, int oflags, struct cdev *dev)
1818 {
1819         struct  sa_softc *softc;
1820         union   ccb *ccb;
1821         int     error;
1822
1823         /*
1824          * oflags can be checked for 'kind' of open (read-only check) - later
1825          * dev can be checked for a control-mode or compression open - later
1826          */
1827         UNUSED_PARAMETER(oflags);
1828         UNUSED_PARAMETER(dev);
1829
1830
1831         softc = (struct sa_softc *)periph->softc;
1832
1833         /*
1834          * This should determine if something has happend since the last
1835          * open/mount that would invalidate the mount. We do *not* want
1836          * to retry this command- we just want the status. But we only
1837          * do this if we're mounted already- if we're not mounted,
1838          * we don't care about the unit read state and can instead use
1839          * this opportunity to attempt to reserve the tape unit.
1840          */
1841
1842         if (softc->flags & SA_FLAG_TAPE_MOUNTED) {
1843                 ccb = cam_periph_getccb(periph, 1);
1844                 scsi_test_unit_ready(&ccb->csio, 0, sadone,
1845                     MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT);
1846                 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1847                     softc->device_stats);
1848                 QFRLS(ccb);
1849                 if (error == ENXIO) {
1850                         softc->flags &= ~SA_FLAG_TAPE_MOUNTED;
1851                         scsi_test_unit_ready(&ccb->csio, 0, sadone,
1852                             MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT);
1853                         error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1854                             softc->device_stats);
1855                         QFRLS(ccb);
1856                 } else if (error) {
1857                         /*
1858                          * We don't need to freeze the tape because we
1859                          * will now attempt to rewind/load it.
1860                          */
1861                         softc->flags &= ~SA_FLAG_TAPE_MOUNTED;
1862                         if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
1863                                 xpt_print(periph->path,
1864                                     "error %d on TUR in samount\n", error);
1865                         }
1866                 }
1867         } else {
1868                 error = sareservereleaseunit(periph, TRUE);
1869                 if (error) {
1870                         return (error);
1871                 }
1872                 ccb = cam_periph_getccb(periph, 1);
1873                 scsi_test_unit_ready(&ccb->csio, 0, sadone,
1874                     MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT);
1875                 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1876                     softc->device_stats);
1877                 QFRLS(ccb);
1878         }
1879
1880         if ((softc->flags & SA_FLAG_TAPE_MOUNTED) == 0) {
1881                 struct scsi_read_block_limits_data *rblim = NULL;
1882                 int comp_enabled, comp_supported;
1883                 u_int8_t write_protect, guessing = 0;
1884
1885                 /*
1886                  * Clear out old state.
1887                  */
1888                 softc->flags &= ~(SA_FLAG_TAPE_WP|SA_FLAG_TAPE_WRITTEN|
1889                                   SA_FLAG_ERR_PENDING|SA_FLAG_COMP_ENABLED|
1890                                   SA_FLAG_COMP_SUPP|SA_FLAG_COMP_UNSUPP);
1891                 softc->filemarks = 0;
1892
1893                 /*
1894                  * *Very* first off, make sure we're loaded to BOT.
1895                  */
1896                 scsi_load_unload(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, FALSE,
1897                     FALSE, FALSE, 1, SSD_FULL_SIZE, REWIND_TIMEOUT);
1898                 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1899                     softc->device_stats);
1900                 QFRLS(ccb);
1901
1902                 /*
1903                  * In case this doesn't work, do a REWIND instead
1904                  */
1905                 if (error) {
1906                         scsi_rewind(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG,
1907                             FALSE, SSD_FULL_SIZE, REWIND_TIMEOUT);
1908                         error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1909                                 softc->device_stats);
1910                         QFRLS(ccb);
1911                 }
1912                 if (error) {
1913                         xpt_release_ccb(ccb);
1914                         goto exit;
1915                 }
1916
1917                 /*
1918                  * Do a dummy test read to force access to the
1919                  * media so that the drive will really know what's
1920                  * there. We actually don't really care what the
1921                  * blocksize on tape is and don't expect to really
1922                  * read a full record.
1923                  */
1924                 rblim = (struct  scsi_read_block_limits_data *)
1925                     malloc(8192, M_SCSISA, M_NOWAIT);
1926                 if (rblim == NULL) {
1927                         xpt_print(periph->path, "no memory for test read\n");
1928                         xpt_release_ccb(ccb);
1929                         error = ENOMEM;
1930                         goto exit;
1931                 }
1932
1933                 if ((softc->quirks & SA_QUIRK_NODREAD) == 0) {
1934                         scsi_sa_read_write(&ccb->csio, 0, sadone,
1935                             MSG_SIMPLE_Q_TAG, 1, FALSE, 0, 8192,
1936                             (void *) rblim, 8192, SSD_FULL_SIZE,
1937                             IO_TIMEOUT);
1938                         (void) cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1939                             softc->device_stats);
1940                         QFRLS(ccb);
1941                         scsi_rewind(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG,
1942                             FALSE, SSD_FULL_SIZE, REWIND_TIMEOUT);
1943                         error = cam_periph_runccb(ccb, saerror, CAM_RETRY_SELTO,
1944                             SF_NO_PRINT | SF_RETRY_UA,
1945                             softc->device_stats);
1946                         QFRLS(ccb);
1947                         if (error) {
1948                                 xpt_print(periph->path,
1949                                     "unable to rewind after test read\n");
1950                                 xpt_release_ccb(ccb);
1951                                 goto exit;
1952                         }
1953                 }
1954
1955                 /*
1956                  * Next off, determine block limits.
1957                  */
1958                 scsi_read_block_limits(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG,
1959                     rblim, SSD_FULL_SIZE, SCSIOP_TIMEOUT);
1960
1961                 error = cam_periph_runccb(ccb, saerror, CAM_RETRY_SELTO,
1962                     SF_NO_PRINT | SF_RETRY_UA, softc->device_stats);
1963
1964                 QFRLS(ccb);
1965                 xpt_release_ccb(ccb);
1966
1967                 if (error != 0) {
1968                         /*
1969                          * If it's less than SCSI-2, READ BLOCK LIMITS is not
1970                          * a MANDATORY command. Anyway- it doesn't matter-
1971                          * we can proceed anyway.
1972                          */
1973                         softc->blk_gran = 0;
1974                         softc->max_blk = ~0;
1975                         softc->min_blk = 0;
1976                 } else {
1977                         if (softc->scsi_rev >= SCSI_REV_SPC) {
1978                                 softc->blk_gran = RBL_GRAN(rblim);
1979                         } else {
1980                                 softc->blk_gran = 0;
1981                         }
1982                         /*
1983                          * We take max_blk == min_blk to mean a default to
1984                          * fixed mode- but note that whatever we get out of
1985                          * sagetparams below will actually determine whether
1986                          * we are actually *in* fixed mode.
1987                          */
1988                         softc->max_blk = scsi_3btoul(rblim->maximum);
1989                         softc->min_blk = scsi_2btoul(rblim->minimum);
1990
1991
1992                 }
1993                 /*
1994                  * Next, perform a mode sense to determine
1995                  * current density, blocksize, compression etc.
1996                  */
1997                 error = sagetparams(periph, SA_PARAM_ALL,
1998                                     &softc->media_blksize,
1999                                     &softc->media_density,
2000                                     &softc->media_numblks,
2001                                     &softc->buffer_mode, &write_protect,
2002                                     &softc->speed, &comp_supported,
2003                                     &comp_enabled, &softc->comp_algorithm,
2004                                     NULL);
2005
2006                 if (error != 0) {
2007                         /*
2008                          * We could work a little harder here. We could
2009                          * adjust our attempts to get information. It
2010                          * might be an ancient tape drive. If someone
2011                          * nudges us, we'll do that.
2012                          */
2013                         goto exit;
2014                 }
2015
2016                 /*
2017                  * If no quirk has determined that this is a device that is
2018                  * preferred to be in fixed or variable mode, now is the time
2019                  * to find out.
2020                  */
2021                 if ((softc->quirks & (SA_QUIRK_FIXED|SA_QUIRK_VARIABLE)) == 0) {
2022                         guessing = 1;
2023                         /*
2024                          * This could be expensive to find out. Luckily we
2025                          * only need to do this once. If we start out in
2026                          * 'default' mode, try and set ourselves to one
2027                          * of the densities that would determine a wad
2028                          * of other stuff. Go from highest to lowest.
2029                          */
2030                         if (softc->media_density == SCSI_DEFAULT_DENSITY) {
2031                                 int i;
2032                                 static u_int8_t ctry[] = {
2033                                         SCSI_DENSITY_HALFINCH_PE,
2034                                         SCSI_DENSITY_HALFINCH_6250C,
2035                                         SCSI_DENSITY_HALFINCH_6250,
2036                                         SCSI_DENSITY_HALFINCH_1600,
2037                                         SCSI_DENSITY_HALFINCH_800,
2038                                         SCSI_DENSITY_QIC_4GB,
2039                                         SCSI_DENSITY_QIC_2GB,
2040                                         SCSI_DENSITY_QIC_525_320,
2041                                         SCSI_DENSITY_QIC_150,
2042                                         SCSI_DENSITY_QIC_120,
2043                                         SCSI_DENSITY_QIC_24,
2044                                         SCSI_DENSITY_QIC_11_9TRK,
2045                                         SCSI_DENSITY_QIC_11_4TRK,
2046                                         SCSI_DENSITY_QIC_1320,
2047                                         SCSI_DENSITY_QIC_3080,
2048                                         0
2049                                 };
2050                                 for (i = 0; ctry[i]; i++) {
2051                                         error = sasetparams(periph,
2052                                             SA_PARAM_DENSITY, 0, ctry[i],
2053                                             0, SF_NO_PRINT);
2054                                         if (error == 0) {
2055                                                 softc->media_density = ctry[i];
2056                                                 break;
2057                                         }
2058                                 }
2059                         }
2060                         switch (softc->media_density) {
2061                         case SCSI_DENSITY_QIC_11_4TRK:
2062                         case SCSI_DENSITY_QIC_11_9TRK:
2063                         case SCSI_DENSITY_QIC_24:
2064                         case SCSI_DENSITY_QIC_120:
2065                         case SCSI_DENSITY_QIC_150:
2066                         case SCSI_DENSITY_QIC_525_320:
2067                         case SCSI_DENSITY_QIC_1320:
2068                         case SCSI_DENSITY_QIC_3080:
2069                                 softc->quirks &= ~SA_QUIRK_2FM;
2070                                 softc->quirks |= SA_QUIRK_FIXED|SA_QUIRK_1FM;
2071                                 softc->last_media_blksize = 512;
2072                                 break;
2073                         case SCSI_DENSITY_QIC_4GB:
2074                         case SCSI_DENSITY_QIC_2GB:
2075                                 softc->quirks &= ~SA_QUIRK_2FM;
2076                                 softc->quirks |= SA_QUIRK_FIXED|SA_QUIRK_1FM;
2077                                 softc->last_media_blksize = 1024;
2078                                 break;
2079                         default:
2080                                 softc->last_media_blksize =
2081                                     softc->media_blksize;
2082                                 softc->quirks |= SA_QUIRK_VARIABLE;
2083                                 break;
2084                         }
2085                 }
2086
2087                 /*
2088                  * If no quirk has determined that this is a device that needs
2089                  * to have 2 Filemarks at EOD, now is the time to find out.
2090                  */
2091
2092                 if ((softc->quirks & SA_QUIRK_2FM) == 0) {
2093                         switch (softc->media_density) {
2094                         case SCSI_DENSITY_HALFINCH_800:
2095                         case SCSI_DENSITY_HALFINCH_1600:
2096                         case SCSI_DENSITY_HALFINCH_6250:
2097                         case SCSI_DENSITY_HALFINCH_6250C:
2098                         case SCSI_DENSITY_HALFINCH_PE:
2099                                 softc->quirks &= ~SA_QUIRK_1FM;
2100                                 softc->quirks |= SA_QUIRK_2FM;
2101                                 break;
2102                         default:
2103                                 break;
2104                         }
2105                 }
2106
2107                 /*
2108                  * Now validate that some info we got makes sense.
2109                  */
2110                 if ((softc->max_blk < softc->media_blksize) ||
2111                     (softc->min_blk > softc->media_blksize &&
2112                     softc->media_blksize)) {
2113                         xpt_print(periph->path,
2114                             "BLOCK LIMITS (%d..%d) could not match current "
2115                             "block settings (%d)- adjusting\n", softc->min_blk,
2116                             softc->max_blk, softc->media_blksize);
2117                         softc->max_blk = softc->min_blk =
2118                             softc->media_blksize;
2119                 }
2120
2121                 /*
2122                  * Now put ourselves into the right frame of mind based
2123                  * upon quirks...
2124                  */
2125 tryagain:
2126                 /*
2127                  * If we want to be in FIXED mode and our current blocksize
2128                  * is not equal to our last blocksize (if nonzero), try and
2129                  * set ourselves to this last blocksize (as the 'preferred'
2130                  * block size).  The initial quirkmatch at registry sets the
2131                  * initial 'last' blocksize. If, for whatever reason, this
2132                  * 'last' blocksize is zero, set the blocksize to 512,
2133                  * or min_blk if that's larger.
2134                  */
2135                 if ((softc->quirks & SA_QUIRK_FIXED) &&
2136                     (softc->quirks & SA_QUIRK_NO_MODESEL) == 0 &&
2137                     (softc->media_blksize != softc->last_media_blksize)) {
2138                         softc->media_blksize = softc->last_media_blksize;
2139                         if (softc->media_blksize == 0) {
2140                                 softc->media_blksize = 512;
2141                                 if (softc->media_blksize < softc->min_blk) {
2142                                         softc->media_blksize = softc->min_blk;
2143                                 }
2144                         }
2145                         error = sasetparams(periph, SA_PARAM_BLOCKSIZE,
2146                             softc->media_blksize, 0, 0, SF_NO_PRINT);
2147                         if (error) {
2148                                 xpt_print(periph->path,
2149                                     "unable to set fixed blocksize to %d\n",
2150                                     softc->media_blksize);
2151                                 goto exit;
2152                         }
2153                 }
2154
2155                 if ((softc->quirks & SA_QUIRK_VARIABLE) &&
2156                     (softc->media_blksize != 0)) {
2157                         softc->last_media_blksize = softc->media_blksize;
2158                         softc->media_blksize = 0;
2159                         error = sasetparams(periph, SA_PARAM_BLOCKSIZE,
2160                             0, 0, 0, SF_NO_PRINT);
2161                         if (error) {
2162                                 /*
2163                                  * If this fails and we were guessing, just
2164                                  * assume that we got it wrong and go try
2165                                  * fixed block mode. Don't even check against
2166                                  * density code at this point.
2167                                  */
2168                                 if (guessing) {
2169                                         softc->quirks &= ~SA_QUIRK_VARIABLE;
2170                                         softc->quirks |= SA_QUIRK_FIXED;
2171                                         if (softc->last_media_blksize == 0)
2172                                                 softc->last_media_blksize = 512;
2173                                         goto tryagain;
2174                                 }
2175                                 xpt_print(periph->path,
2176                                     "unable to set variable blocksize\n");
2177                                 goto exit;
2178                         }
2179                 }
2180
2181                 /*
2182                  * Now that we have the current block size,
2183                  * set up some parameters for sastart's usage.
2184                  */
2185                 if (softc->media_blksize) {
2186                         softc->flags |= SA_FLAG_FIXED;
2187                         if (powerof2(softc->media_blksize)) {
2188                                 softc->blk_shift =
2189                                     ffs(softc->media_blksize) - 1;
2190                                 softc->blk_mask = softc->media_blksize - 1;
2191                         } else {
2192                                 softc->blk_mask = ~0;
2193                                 softc->blk_shift = 0;
2194                         }
2195                 } else {
2196                         /*
2197                          * The SCSI-3 spec allows 0 to mean "unspecified".
2198                          * The SCSI-1 spec allows 0 to mean 'infinite'.
2199                          *
2200                          * Either works here.
2201                          */
2202                         if (softc->max_blk == 0) {
2203                                 softc->max_blk = ~0;
2204                         }
2205                         softc->blk_shift = 0;
2206                         if (softc->blk_gran != 0) {
2207                                 softc->blk_mask = softc->blk_gran - 1;
2208                         } else {
2209                                 softc->blk_mask = 0;
2210                         }
2211                 }
2212
2213                 if (write_protect)
2214                         softc->flags |= SA_FLAG_TAPE_WP;
2215
2216                 if (comp_supported) {
2217                         if (softc->saved_comp_algorithm == 0)
2218                                 softc->saved_comp_algorithm =
2219                                     softc->comp_algorithm;
2220                         softc->flags |= SA_FLAG_COMP_SUPP;
2221                         if (comp_enabled)
2222                                 softc->flags |= SA_FLAG_COMP_ENABLED;
2223                 } else
2224                         softc->flags |= SA_FLAG_COMP_UNSUPP;
2225
2226                 if ((softc->buffer_mode == SMH_SA_BUF_MODE_NOBUF) &&
2227                     (softc->quirks & SA_QUIRK_NO_MODESEL) == 0) {
2228                         error = sasetparams(periph, SA_PARAM_BUFF_MODE, 0,
2229                             0, 0, SF_NO_PRINT);
2230                         if (error == 0) {
2231                                 softc->buffer_mode = SMH_SA_BUF_MODE_SIBUF;
2232                         } else {
2233                                 xpt_print(periph->path,
2234                                     "unable to set buffered mode\n");
2235                         }
2236                         error = 0;      /* not an error */
2237                 }
2238
2239
2240                 if (error == 0) {
2241                         softc->flags |= SA_FLAG_TAPE_MOUNTED;
2242                 }
2243 exit:
2244                 if (rblim != NULL)
2245                         free(rblim, M_SCSISA);
2246
2247                 if (error != 0) {
2248                         softc->dsreg = MTIO_DSREG_NIL;
2249                 } else {
2250                         softc->fileno = softc->blkno = 0;
2251                         softc->dsreg = MTIO_DSREG_REST;
2252                 }
2253 #ifdef  SA_1FM_AT_EOD
2254                 if ((softc->quirks & SA_QUIRK_2FM) == 0)
2255                         softc->quirks |= SA_QUIRK_1FM;
2256 #else
2257                 if ((softc->quirks & SA_QUIRK_1FM) == 0)
2258                         softc->quirks |= SA_QUIRK_2FM;
2259 #endif
2260         } else
2261                 xpt_release_ccb(ccb);
2262
2263         /*
2264          * If we return an error, we're not mounted any more,
2265          * so release any device reservation.
2266          */
2267         if (error != 0) {
2268                 (void) sareservereleaseunit(periph, FALSE);
2269         } else {
2270                 /*
2271                  * Clear I/O residual.
2272                  */
2273                 softc->last_io_resid = 0;
2274                 softc->last_ctl_resid = 0;
2275         }
2276         return (error);
2277 }
2278
2279 /*
2280  * How many filemarks do we need to write if we were to terminate the
2281  * tape session right now? Note that this can be a negative number
2282  */
2283
2284 static int
2285 samarkswanted(struct cam_periph *periph)
2286 {
2287         int     markswanted;
2288         struct  sa_softc *softc;
2289
2290         softc = (struct sa_softc *)periph->softc;
2291         markswanted = 0;
2292         if ((softc->flags & SA_FLAG_TAPE_WRITTEN) != 0) {
2293                 markswanted++;
2294                 if (softc->quirks & SA_QUIRK_2FM)
2295                         markswanted++;
2296         }
2297         markswanted -= softc->filemarks;
2298         return (markswanted);
2299 }
2300
2301 static int
2302 sacheckeod(struct cam_periph *periph)
2303 {
2304         int     error;
2305         int     markswanted;
2306
2307         markswanted = samarkswanted(periph);
2308
2309         if (markswanted > 0) {
2310                 error = sawritefilemarks(periph, markswanted, FALSE);
2311         } else {
2312                 error = 0;
2313         }
2314         return (error);
2315 }
2316
2317 static int
2318 saerror(union ccb *ccb, u_int32_t cflgs, u_int32_t sflgs)
2319 {
2320         static const char *toobig =
2321             "%d-byte tape record bigger than supplied buffer\n";
2322         struct  cam_periph *periph;
2323         struct  sa_softc *softc;
2324         struct  ccb_scsiio *csio;
2325         struct  scsi_sense_data *sense;
2326         u_int32_t resid = 0;
2327         int32_t info = 0;
2328         cam_status status;
2329         int error_code, sense_key, asc, ascq, error, aqvalid;
2330
2331         periph = xpt_path_periph(ccb->ccb_h.path);
2332         softc = (struct sa_softc *)periph->softc;
2333         csio = &ccb->csio;
2334         sense = &csio->sense_data;
2335         scsi_extract_sense(sense, &error_code, &sense_key, &asc, &ascq);
2336         aqvalid = sense->extra_len >= 6;
2337         error = 0;
2338
2339         status = csio->ccb_h.status & CAM_STATUS_MASK;
2340
2341         /*
2342          * Calculate/latch up, any residuals... We do this in a funny 2-step
2343          * so we can print stuff here if we have CAM_DEBUG enabled for this
2344          * unit.
2345          */
2346         if (status == CAM_SCSI_STATUS_ERROR) {
2347                 if ((sense->error_code & SSD_ERRCODE_VALID) != 0) {
2348                         info = (int32_t) scsi_4btoul(sense->info);
2349                         resid = info;
2350                         if ((softc->flags & SA_FLAG_FIXED) != 0)
2351                                 resid *= softc->media_blksize;
2352                 } else {
2353                         resid = csio->dxfer_len;
2354                         info = resid;
2355                         if ((softc->flags & SA_FLAG_FIXED) != 0) {
2356                                 if (softc->media_blksize)
2357                                         info /= softc->media_blksize;
2358                         }
2359                 }
2360                 if (CCB_Type(csio) == SA_CCB_BUFFER_IO) {
2361                         bcopy((caddr_t) sense, (caddr_t) &softc->last_io_sense,
2362                             sizeof (struct scsi_sense_data));
2363                         bcopy(csio->cdb_io.cdb_bytes, softc->last_io_cdb,
2364                             (int) csio->cdb_len);
2365                         softc->last_io_resid = resid;
2366                         softc->last_resid_was_io = 1;
2367                 } else {
2368                         bcopy((caddr_t) sense, (caddr_t) &softc->last_ctl_sense,
2369                             sizeof (struct scsi_sense_data));
2370                         bcopy(csio->cdb_io.cdb_bytes, softc->last_ctl_cdb,
2371                             (int) csio->cdb_len);
2372                         softc->last_ctl_resid = resid;
2373                         softc->last_resid_was_io = 0;
2374                 }
2375                 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, ("CDB[0]=0x%x Key 0x%x "
2376                     "ASC/ASCQ 0x%x/0x%x CAM STATUS 0x%x flags 0x%x resid %d "
2377                     "dxfer_len %d\n", csio->cdb_io.cdb_bytes[0] & 0xff,
2378                     sense_key, asc, ascq, status,
2379                     sense->flags & ~SSD_KEY_RESERVED, resid, csio->dxfer_len));
2380         } else {
2381                 CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
2382                     ("Cam Status 0x%x\n", status));
2383         }
2384
2385         switch (status) {
2386         case CAM_REQ_CMP:
2387                 return (0);
2388         case CAM_SCSI_STATUS_ERROR:
2389                 /*
2390                  * If a read/write command, we handle it here.
2391                  */
2392                 if (CCB_Type(csio) != SA_CCB_WAITING) {
2393                         break;
2394                 }
2395                 /*
2396                  * If this was just EOM/EOP, Filemark, Setmark or ILI detected
2397                  * on a non read/write command, we assume it's not an error
2398                  * and propagate the residule and return.
2399                  */
2400                 if ((aqvalid && asc == 0 && ascq > 0 && ascq <= 5) ||
2401                     (aqvalid == 0 && sense_key == SSD_KEY_NO_SENSE)) {
2402                         csio->resid = resid;
2403                         QFRLS(ccb);
2404                         return (0);
2405                 }
2406                 /*
2407                  * Otherwise, we let the common code handle this.
2408                  */
2409                 return (cam_periph_error(ccb, cflgs, sflgs, &softc->saved_ccb));
2410
2411         /*
2412          * XXX: To Be Fixed
2413          * We cannot depend upon CAM honoring retry counts for these.
2414          */
2415         case CAM_SCSI_BUS_RESET:
2416         case CAM_BDR_SENT:
2417                 if (ccb->ccb_h.retry_count <= 0) {
2418                         return (EIO);
2419                 }
2420                 /* FALLTHROUGH */
2421         default:
2422                 return (cam_periph_error(ccb, cflgs, sflgs, &softc->saved_ccb));
2423         }
2424
2425         /*
2426          * Handle filemark, end of tape, mismatched record sizes....
2427          * From this point out, we're only handling read/write cases.
2428          * Handle writes && reads differently.
2429          */
2430
2431         if (csio->cdb_io.cdb_bytes[0] == SA_WRITE) {
2432                 if (sense_key == SSD_KEY_VOLUME_OVERFLOW) {
2433                         csio->resid = resid;
2434                         error = ENOSPC;
2435                 } else if (sense->flags & SSD_EOM) {
2436                         softc->flags |= SA_FLAG_EOM_PENDING;
2437                         /*
2438                          * Grotesque as it seems, the few times
2439                          * I've actually seen a non-zero resid,
2440                          * the tape drive actually lied and had
2441                          * written all the data!.
2442                          */
2443                         csio->resid = 0;
2444                 }
2445         } else {
2446                 csio->resid = resid;
2447                 if (sense_key == SSD_KEY_BLANK_CHECK) {
2448                         if (softc->quirks & SA_QUIRK_1FM) {
2449                                 error = 0;
2450                                 softc->flags |= SA_FLAG_EOM_PENDING;
2451                         } else {
2452                                 error = EIO;
2453                         }
2454                 } else if (sense->flags & SSD_FILEMARK) {
2455                         if (softc->flags & SA_FLAG_FIXED) {
2456                                 error = -1;
2457                                 softc->flags |= SA_FLAG_EOF_PENDING;
2458                         }
2459                         /*
2460                          * Unconditionally, if we detected a filemark on a read,
2461                          * mark that we've run moved a file ahead.
2462                          */
2463                         if (softc->fileno != (daddr_t) -1) {
2464                                 softc->fileno++;
2465                                 softc->blkno = 0;
2466                                 csio->ccb_h.ccb_pflags |= SA_POSITION_UPDATED;
2467                         }
2468                 }
2469         }
2470
2471         /*
2472          * Incorrect Length usually applies to read, but can apply to writes.
2473          */
2474         if (error == 0 && (sense->flags & SSD_ILI)) {
2475                 if (info < 0) {
2476                         xpt_print(csio->ccb_h.path, toobig,
2477                             csio->dxfer_len - info);
2478                         csio->resid = csio->dxfer_len;
2479                         error = EIO;
2480                 } else {
2481                         csio->resid = resid;
2482                         if (softc->flags & SA_FLAG_FIXED) {
2483                                 softc->flags |= SA_FLAG_EIO_PENDING;
2484                         }
2485                         /*
2486                          * Bump the block number if we hadn't seen a filemark.
2487                          * Do this independent of errors (we've moved anyway).
2488                          */
2489                         if ((sense->flags & SSD_FILEMARK) == 0) {
2490                                 if (softc->blkno != (daddr_t) -1) {
2491                                         softc->blkno++;
2492                                         csio->ccb_h.ccb_pflags |=
2493                                            SA_POSITION_UPDATED;
2494                                 }
2495                         }
2496                 }
2497         }
2498
2499         if (error <= 0) {
2500                 /*
2501                  * Unfreeze the queue if frozen as we're not returning anything
2502                  * to our waiters that would indicate an I/O error has occurred
2503                  * (yet).
2504                  */
2505                 QFRLS(ccb);
2506                 error = 0;
2507         }
2508         return (error);
2509 }
2510
2511 static int
2512 sagetparams(struct cam_periph *periph, sa_params params_to_get,
2513             u_int32_t *blocksize, u_int8_t *density, u_int32_t *numblocks,
2514             int *buff_mode, u_int8_t *write_protect, u_int8_t *speed,
2515             int *comp_supported, int *comp_enabled, u_int32_t *comp_algorithm,
2516             sa_comp_t *tcs)
2517 {
2518         union ccb *ccb;
2519         void *mode_buffer;
2520         struct scsi_mode_header_6 *mode_hdr;
2521         struct scsi_mode_blk_desc *mode_blk;
2522         int mode_buffer_len;
2523         struct sa_softc *softc;
2524         u_int8_t cpage;
2525         int error;
2526         cam_status status;
2527
2528         softc = (struct sa_softc *)periph->softc;
2529         ccb = cam_periph_getccb(periph, 1);
2530         if (softc->quirks & SA_QUIRK_NO_CPAGE)
2531                 cpage = SA_DEVICE_CONFIGURATION_PAGE;
2532         else
2533                 cpage = SA_DATA_COMPRESSION_PAGE;
2534
2535 retry:
2536         mode_buffer_len = sizeof(*mode_hdr) + sizeof(*mode_blk);
2537
2538         if (params_to_get & SA_PARAM_COMPRESSION) {
2539                 if (softc->quirks & SA_QUIRK_NOCOMP) {
2540                         *comp_supported = FALSE;
2541                         params_to_get &= ~SA_PARAM_COMPRESSION;
2542                 } else
2543                         mode_buffer_len += sizeof (sa_comp_t);
2544         }
2545
2546         /* XXX Fix M_NOWAIT */
2547         mode_buffer = malloc(mode_buffer_len, M_SCSISA, M_NOWAIT | M_ZERO);
2548         if (mode_buffer == NULL) {
2549                 xpt_release_ccb(ccb);
2550                 return (ENOMEM);
2551         }
2552         mode_hdr = (struct scsi_mode_header_6 *)mode_buffer;
2553         mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1];
2554
2555         /* it is safe to retry this */
2556         scsi_mode_sense(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, FALSE,
2557             SMS_PAGE_CTRL_CURRENT, (params_to_get & SA_PARAM_COMPRESSION) ?
2558             cpage : SMS_VENDOR_SPECIFIC_PAGE, mode_buffer, mode_buffer_len,
2559             SSD_FULL_SIZE, SCSIOP_TIMEOUT);
2560
2561         error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
2562             softc->device_stats);
2563         QFRLS(ccb);
2564
2565         status = ccb->ccb_h.status & CAM_STATUS_MASK;
2566
2567         if (error == EINVAL && (params_to_get & SA_PARAM_COMPRESSION) != 0) {
2568                 /*
2569                  * Hmm. Let's see if we can try another page...
2570                  * If we've already done that, give up on compression
2571                  * for this device and remember this for the future
2572                  * and attempt the request without asking for compression
2573                  * info.
2574                  */
2575                 if (cpage == SA_DATA_COMPRESSION_PAGE) {
2576                         cpage = SA_DEVICE_CONFIGURATION_PAGE;
2577                         goto retry;
2578                 }
2579                 softc->quirks |= SA_QUIRK_NOCOMP;
2580                 free(mode_buffer, M_SCSISA);
2581                 goto retry;
2582         } else if (status == CAM_SCSI_STATUS_ERROR) {
2583                 /* Tell the user about the fatal error. */
2584                 scsi_sense_print(&ccb->csio);
2585                 goto sagetparamsexit;
2586         }
2587
2588         /*
2589          * If the user only wants the compression information, and
2590          * the device doesn't send back the block descriptor, it's
2591          * no big deal.  If the user wants more than just
2592          * compression, though, and the device doesn't pass back the
2593          * block descriptor, we need to send another mode sense to
2594          * get the block descriptor.
2595          */
2596         if ((mode_hdr->blk_desc_len == 0) &&
2597             (params_to_get & SA_PARAM_COMPRESSION) &&
2598             (params_to_get & ~(SA_PARAM_COMPRESSION))) {
2599
2600                 /*
2601                  * Decrease the mode buffer length by the size of
2602                  * the compression page, to make sure the data
2603                  * there doesn't get overwritten.
2604                  */
2605                 mode_buffer_len -= sizeof (sa_comp_t);
2606
2607                 /*
2608                  * Now move the compression page that we presumably
2609                  * got back down the memory chunk a little bit so
2610                  * it doesn't get spammed.
2611                  */
2612                 bcopy(&mode_hdr[0], &mode_hdr[1], sizeof (sa_comp_t));
2613                 bzero(&mode_hdr[0], sizeof (mode_hdr[0]));
2614
2615                 /*
2616                  * Now, we issue another mode sense and just ask
2617                  * for the block descriptor, etc.
2618                  */
2619
2620                 scsi_mode_sense(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, FALSE,
2621                     SMS_PAGE_CTRL_CURRENT, SMS_VENDOR_SPECIFIC_PAGE,
2622                     mode_buffer, mode_buffer_len, SSD_FULL_SIZE,
2623                     SCSIOP_TIMEOUT);
2624
2625                 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
2626                     softc->device_stats);
2627                 QFRLS(ccb);
2628
2629                 if (error != 0)
2630                         goto sagetparamsexit;
2631         }
2632
2633         if (params_to_get & SA_PARAM_BLOCKSIZE)
2634                 *blocksize = scsi_3btoul(mode_blk->blklen);
2635
2636         if (params_to_get & SA_PARAM_NUMBLOCKS)
2637                 *numblocks = scsi_3btoul(mode_blk->nblocks);
2638
2639         if (params_to_get & SA_PARAM_BUFF_MODE)
2640                 *buff_mode = mode_hdr->dev_spec & SMH_SA_BUF_MODE_MASK;
2641
2642         if (params_to_get & SA_PARAM_DENSITY)
2643                 *density = mode_blk->density;
2644
2645         if (params_to_get & SA_PARAM_WP)
2646                 *write_protect = (mode_hdr->dev_spec & SMH_SA_WP)? TRUE : FALSE;
2647
2648         if (params_to_get & SA_PARAM_SPEED)
2649                 *speed = mode_hdr->dev_spec & SMH_SA_SPEED_MASK;
2650
2651         if (params_to_get & SA_PARAM_COMPRESSION) {
2652                 sa_comp_t *ntcs = (sa_comp_t *) &mode_blk[1];
2653                 if (cpage == SA_DATA_COMPRESSION_PAGE) {
2654                         struct scsi_data_compression_page *cp = &ntcs->dcomp;
2655                         *comp_supported =
2656                             (cp->dce_and_dcc & SA_DCP_DCC)? TRUE : FALSE;
2657                         *comp_enabled =
2658                             (cp->dce_and_dcc & SA_DCP_DCE)? TRUE : FALSE;
2659                         *comp_algorithm = scsi_4btoul(cp->comp_algorithm);
2660                 } else {
2661                         struct scsi_dev_conf_page *cp = &ntcs->dconf;
2662                         /*
2663                          * We don't really know whether this device supports
2664                          * Data Compression if the the algorithm field is
2665                          * zero. Just say we do.
2666                          */
2667                         *comp_supported = TRUE;
2668                         *comp_enabled =
2669                             (cp->sel_comp_alg != SA_COMP_NONE)? TRUE : FALSE;
2670                         *comp_algorithm = cp->sel_comp_alg;
2671                 }
2672                 if (tcs != NULL)
2673                         bcopy(ntcs, tcs, sizeof (sa_comp_t));
2674         }
2675
2676         if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
2677                 int idx;
2678                 char *xyz = mode_buffer;
2679                 xpt_print_path(periph->path);
2680                 printf("Mode Sense Data=");
2681                 for (idx = 0; idx < mode_buffer_len; idx++)
2682                         printf(" 0x%02x", xyz[idx] & 0xff);
2683                 printf("\n");
2684         }
2685
2686 sagetparamsexit:
2687
2688         xpt_release_ccb(ccb);
2689         free(mode_buffer, M_SCSISA);
2690         return (error);
2691 }
2692
2693 /*
2694  * The purpose of this function is to set one of four different parameters
2695  * for a tape drive:
2696  *      - blocksize
2697  *      - density
2698  *      - compression / compression algorithm
2699  *      - buffering mode
2700  *
2701  * The assumption is that this will be called from saioctl(), and therefore
2702  * from a process context.  Thus the waiting malloc calls below.  If that
2703  * assumption ever changes, the malloc calls should be changed to be
2704  * NOWAIT mallocs.
2705  *
2706  * Any or all of the four parameters may be set when this function is
2707  * called.  It should handle setting more than one parameter at once.
2708  */
2709 static int
2710 sasetparams(struct cam_periph *periph, sa_params params_to_set,
2711             u_int32_t blocksize, u_int8_t density, u_int32_t calg,
2712             u_int32_t sense_flags)
2713 {
2714         struct sa_softc *softc;
2715         u_int32_t current_blocksize;
2716         u_int32_t current_calg;
2717         u_int8_t current_density;
2718         u_int8_t current_speed;
2719         int comp_enabled, comp_supported;
2720         void *mode_buffer;
2721         int mode_buffer_len;
2722         struct scsi_mode_header_6 *mode_hdr;
2723         struct scsi_mode_blk_desc *mode_blk;
2724         sa_comp_t *ccomp, *cpage;
2725         int buff_mode;
2726         union ccb *ccb = NULL;
2727         int error;
2728
2729         softc = (struct sa_softc *)periph->softc;
2730
2731         ccomp = malloc(sizeof (sa_comp_t), M_SCSISA, M_NOWAIT);
2732         if (ccomp == NULL)
2733                 return (ENOMEM);
2734
2735         /*
2736          * Since it doesn't make sense to set the number of blocks, or
2737          * write protection, we won't try to get the current value.  We
2738          * always want to get the blocksize, so we can set it back to the
2739          * proper value.
2740          */
2741         error = sagetparams(periph,
2742             params_to_set | SA_PARAM_BLOCKSIZE | SA_PARAM_SPEED,
2743             &current_blocksize, &current_density, NULL, &buff_mode, NULL,
2744             &current_speed, &comp_supported, &comp_enabled,
2745             &current_calg, ccomp);
2746
2747         if (error != 0) {
2748                 free(ccomp, M_SCSISA);
2749                 return (error);
2750         }
2751
2752         mode_buffer_len = sizeof(*mode_hdr) + sizeof(*mode_blk);
2753         if (params_to_set & SA_PARAM_COMPRESSION)
2754                 mode_buffer_len += sizeof (sa_comp_t);
2755
2756         mode_buffer = malloc(mode_buffer_len, M_SCSISA, M_NOWAIT | M_ZERO);
2757         if (mode_buffer == NULL) {
2758                 free(ccomp, M_SCSISA);
2759                 return (ENOMEM);
2760         }
2761
2762         mode_hdr = (struct scsi_mode_header_6 *)mode_buffer;
2763         mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1];
2764
2765         ccb = cam_periph_getccb(periph, 1);
2766
2767 retry:
2768
2769         if (params_to_set & SA_PARAM_COMPRESSION) {
2770                 if (mode_blk) {
2771                         cpage = (sa_comp_t *)&mode_blk[1];
2772                 } else {
2773                         cpage = (sa_comp_t *)&mode_hdr[1];
2774                 }
2775                 bcopy(ccomp, cpage, sizeof (sa_comp_t));
2776                 cpage->hdr.pagecode &= ~0x80;
2777         } else
2778                 cpage = NULL;
2779
2780         /*
2781          * If the caller wants us to set the blocksize, use the one they
2782          * pass in.  Otherwise, use the blocksize we got back from the
2783          * mode select above.
2784          */
2785         if (mode_blk) {
2786                 if (params_to_set & SA_PARAM_BLOCKSIZE)
2787                         scsi_ulto3b(blocksize, mode_blk->blklen);
2788                 else
2789                         scsi_ulto3b(current_blocksize, mode_blk->blklen);
2790
2791                 /*
2792                  * Set density if requested, else preserve old density.
2793                  * SCSI_SAME_DENSITY only applies to SCSI-2 or better
2794                  * devices, else density we've latched up in our softc.
2795                  */
2796                 if (params_to_set & SA_PARAM_DENSITY) {
2797                         mode_blk->density = density;
2798                 } else if (softc->scsi_rev > SCSI_REV_CCS) {
2799                         mode_blk->density = SCSI_SAME_DENSITY;
2800                 } else {
2801                         mode_blk->density = softc->media_density;
2802                 }
2803         }
2804
2805         /*
2806          * For mode selects, these two fields must be zero.
2807          */
2808         mode_hdr->data_length = 0;
2809         mode_hdr->medium_type = 0;
2810
2811         /* set the speed to the current value */
2812         mode_hdr->dev_spec = current_speed;
2813
2814         /* if set, set single-initiator buffering mode */
2815         if (softc->buffer_mode == SMH_SA_BUF_MODE_SIBUF) {
2816                 mode_hdr->dev_spec |= SMH_SA_BUF_MODE_SIBUF;
2817         }
2818
2819         if (mode_blk)
2820                 mode_hdr->blk_desc_len = sizeof(struct scsi_mode_blk_desc);
2821         else
2822                 mode_hdr->blk_desc_len = 0;
2823
2824         /*
2825          * First, if the user wants us to set the compression algorithm or
2826          * just turn compression on, check to make sure that this drive
2827          * supports compression.
2828          */
2829         if (params_to_set & SA_PARAM_COMPRESSION) {
2830                 /*
2831                  * If the compression algorithm is 0, disable compression.
2832                  * If the compression algorithm is non-zero, enable
2833                  * compression and set the compression type to the
2834                  * specified compression algorithm, unless the algorithm is
2835                  * MT_COMP_ENABLE.  In that case, we look at the
2836                  * compression algorithm that is currently set and if it is
2837                  * non-zero, we leave it as-is.  If it is zero, and we have
2838                  * saved a compression algorithm from a time when
2839                  * compression was enabled before, set the compression to
2840                  * the saved value.
2841                  */
2842                 switch (ccomp->hdr.pagecode & ~0x80) {
2843                 case SA_DEVICE_CONFIGURATION_PAGE:
2844                 {
2845                         struct scsi_dev_conf_page *dcp = &cpage->dconf;
2846                         if (calg == 0) {
2847                                 dcp->sel_comp_alg = SA_COMP_NONE;
2848                                 break;
2849                         }
2850                         if (calg != MT_COMP_ENABLE) {
2851                                 dcp->sel_comp_alg = calg;
2852                         } else if (dcp->sel_comp_alg == SA_COMP_NONE &&
2853                             softc->saved_comp_algorithm != 0) {
2854                                 dcp->sel_comp_alg = softc->saved_comp_algorithm;
2855                         }
2856                         break;
2857                 }
2858                 case SA_DATA_COMPRESSION_PAGE:
2859                 if (ccomp->dcomp.dce_and_dcc & SA_DCP_DCC) {
2860                         struct scsi_data_compression_page *dcp = &cpage->dcomp;
2861                         if (calg == 0) {
2862                                 /*
2863                                  * Disable compression, but leave the
2864                                  * decompression and the capability bit
2865                                  * alone.
2866                                  */
2867                                 dcp->dce_and_dcc = SA_DCP_DCC;
2868                                 dcp->dde_and_red |= SA_DCP_DDE;
2869                                 break;
2870                         }
2871                         /* enable compression && decompression */
2872                         dcp->dce_and_dcc = SA_DCP_DCE | SA_DCP_DCC;
2873                         dcp->dde_and_red |= SA_DCP_DDE;
2874                         /*
2875                          * If there, use compression algorithm from caller.
2876                          * Otherwise, if there's a saved compression algorithm
2877                          * and there is no current algorithm, use the saved
2878                          * algorithm. Else parrot back what we got and hope
2879                          * for the best.
2880                          */
2881                         if (calg != MT_COMP_ENABLE) {
2882                                 scsi_ulto4b(calg, dcp->comp_algorithm);
2883                                 scsi_ulto4b(calg, dcp->decomp_algorithm);
2884                         } else if (scsi_4btoul(dcp->comp_algorithm) == 0 &&
2885                             softc->saved_comp_algorithm != 0) {
2886                                 scsi_ulto4b(softc->saved_comp_algorithm,
2887                                     dcp->comp_algorithm);
2888                                 scsi_ulto4b(softc->saved_comp_algorithm,
2889                                     dcp->decomp_algorithm);
2890                         }
2891                         break;
2892                 }
2893                 /*
2894                  * Compression does not appear to be supported-
2895                  * at least via the DATA COMPRESSION page. It
2896                  * would be too much to ask us to believe that
2897                  * the page itself is supported, but incorrectly
2898                  * reports an ability to manipulate data compression,
2899                  * so we'll assume that this device doesn't support
2900                  * compression. We can just fall through for that.
2901                  */
2902                 /* FALLTHROUGH */
2903                 default:
2904                         /*
2905                          * The drive doesn't seem to support compression,
2906                          * so turn off the set compression bit.
2907                          */
2908                         params_to_set &= ~SA_PARAM_COMPRESSION;
2909                         xpt_print(periph->path,
2910                             "device does not seem to support compression\n");
2911
2912                         /*
2913                          * If that was the only thing the user wanted us to set,
2914                          * clean up allocated resources and return with
2915                          * 'operation not supported'.
2916                          */
2917                         if (params_to_set == SA_PARAM_NONE) {
2918                                 free(mode_buffer, M_SCSISA);
2919                                 xpt_release_ccb(ccb);
2920                                 return (ENODEV);
2921                         }
2922
2923                         /*
2924                          * That wasn't the only thing the user wanted us to set.
2925                          * So, decrease the stated mode buffer length by the
2926                          * size of the compression mode page.
2927                          */
2928                         mode_buffer_len -= sizeof(sa_comp_t);
2929                 }
2930         }
2931
2932         /* It is safe to retry this operation */
2933         scsi_mode_select(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG,
2934             (params_to_set & SA_PARAM_COMPRESSION)? TRUE : FALSE,
2935             FALSE, mode_buffer, mode_buffer_len, SSD_FULL_SIZE, SCSIOP_TIMEOUT);
2936
2937         error = cam_periph_runccb(ccb, saerror, 0,
2938             sense_flags, softc->device_stats);
2939         QFRLS(ccb);
2940
2941         if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
2942                 int idx;
2943                 char *xyz = mode_buffer;
2944                 xpt_print_path(periph->path);
2945                 printf("Err%d, Mode Select Data=", error);
2946                 for (idx = 0; idx < mode_buffer_len; idx++)
2947                         printf(" 0x%02x", xyz[idx] & 0xff);
2948                 printf("\n");
2949         }
2950
2951
2952         if (error) {
2953                 /*
2954                  * If we can, try without setting density/blocksize.
2955                  */
2956                 if (mode_blk) {
2957                         if ((params_to_set &
2958                             (SA_PARAM_DENSITY|SA_PARAM_BLOCKSIZE)) == 0) {
2959                                 mode_blk = NULL;
2960                                 goto retry;
2961                         }
2962                 } else {
2963                         mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1];
2964                         cpage = (sa_comp_t *)&mode_blk[1];
2965                 }
2966
2967                 /*
2968                  * If we were setting the blocksize, and that failed, we
2969                  * want to set it to its original value.  If we weren't
2970                  * setting the blocksize, we don't want to change it.
2971                  */
2972                 scsi_ulto3b(current_blocksize, mode_blk->blklen);
2973
2974                 /*
2975                  * Set density if requested, else preserve old density.
2976                  * SCSI_SAME_DENSITY only applies to SCSI-2 or better
2977                  * devices, else density we've latched up in our softc.
2978                  */
2979                 if (params_to_set & SA_PARAM_DENSITY) {
2980                         mode_blk->density = current_density;
2981                 } else if (softc->scsi_rev > SCSI_REV_CCS) {
2982                         mode_blk->density = SCSI_SAME_DENSITY;
2983                 } else {
2984                         mode_blk->density = softc->media_density;
2985                 }
2986
2987                 if (params_to_set & SA_PARAM_COMPRESSION)
2988                         bcopy(ccomp, cpage, sizeof (sa_comp_t));
2989
2990                 /*
2991                  * The retry count is the only CCB field that might have been
2992                  * changed that we care about, so reset it back to 1.
2993                  */
2994                 ccb->ccb_h.retry_count = 1;
2995                 cam_periph_runccb(ccb, saerror, 0, sense_flags,
2996                     softc->device_stats);
2997                 QFRLS(ccb);
2998         }
2999
3000         xpt_release_ccb(ccb);
3001
3002         if (ccomp != NULL)
3003                 free(ccomp, M_SCSISA);
3004
3005         if (params_to_set & SA_PARAM_COMPRESSION) {
3006                 if (error) {
3007                         softc->flags &= ~SA_FLAG_COMP_ENABLED;
3008                         /*
3009                          * Even if we get an error setting compression,
3010                          * do not say that we don't support it. We could
3011                          * have been wrong, or it may be media specific.
3012                          *      softc->flags &= ~SA_FLAG_COMP_SUPP;
3013                          */
3014                         softc->saved_comp_algorithm = softc->comp_algorithm;
3015                         softc->comp_algorithm = 0;
3016                 } else {
3017                         softc->flags |= SA_FLAG_COMP_ENABLED;
3018                         softc->comp_algorithm = calg;
3019                 }
3020         }
3021
3022         free(mode_buffer, M_SCSISA);
3023         return (error);
3024 }
3025
3026 static void
3027 saprevent(struct cam_periph *periph, int action)
3028 {
3029         struct  sa_softc *softc;
3030         union   ccb *ccb;
3031         int     error, sf;
3032
3033         softc = (struct sa_softc *)periph->softc;
3034
3035         if ((action == PR_ALLOW) && (softc->flags & SA_FLAG_TAPE_LOCKED) == 0)
3036                 return;
3037         if ((action == PR_PREVENT) && (softc->flags & SA_FLAG_TAPE_LOCKED) != 0)
3038                 return;
3039
3040         /*
3041          * We can be quiet about illegal requests.
3042          */
3043         if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
3044                 sf = 0;
3045         } else
3046                 sf = SF_QUIET_IR;
3047
3048         ccb = cam_periph_getccb(periph, 1);
3049
3050         /* It is safe to retry this operation */
3051         scsi_prevent(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, action,
3052             SSD_FULL_SIZE, SCSIOP_TIMEOUT);
3053
3054         error = cam_periph_runccb(ccb, saerror, 0, sf, softc->device_stats);
3055         QFRLS(ccb);
3056         if (error == 0) {
3057                 if (action == PR_ALLOW)
3058                         softc->flags &= ~SA_FLAG_TAPE_LOCKED;
3059                 else
3060                         softc->flags |= SA_FLAG_TAPE_LOCKED;
3061         }
3062
3063         xpt_release_ccb(ccb);
3064 }
3065
3066 static int
3067 sarewind(struct cam_periph *periph)
3068 {
3069         union   ccb *ccb;
3070         struct  sa_softc *softc;
3071         int     error;
3072
3073         softc = (struct sa_softc *)periph->softc;
3074
3075         ccb = cam_periph_getccb(periph, 1);
3076
3077         /* It is safe to retry this operation */
3078         scsi_rewind(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, FALSE,
3079             SSD_FULL_SIZE, REWIND_TIMEOUT);
3080
3081         softc->dsreg = MTIO_DSREG_REW;
3082         error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
3083         softc->dsreg = MTIO_DSREG_REST;
3084
3085         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3086                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE);
3087
3088         xpt_release_ccb(ccb);
3089         if (error == 0)
3090                 softc->fileno = softc->blkno = (daddr_t) 0;
3091         else
3092                 softc->fileno = softc->blkno = (daddr_t) -1;
3093         return (error);
3094 }
3095
3096 static int
3097 saspace(struct cam_periph *periph, int count, scsi_space_code code)
3098 {
3099         union   ccb *ccb;
3100         struct  sa_softc *softc;
3101         int     error;
3102
3103         softc = (struct sa_softc *)periph->softc;
3104
3105         ccb = cam_periph_getccb(periph, 1);
3106
3107         /* This cannot be retried */
3108
3109         scsi_space(&ccb->csio, 0, sadone, MSG_SIMPLE_Q_TAG, code, count,
3110             SSD_FULL_SIZE, SPACE_TIMEOUT);
3111
3112         /*
3113          * Clear residual because we will be using it.
3114          */
3115         softc->last_ctl_resid = 0;
3116
3117         softc->dsreg = (count < 0)? MTIO_DSREG_REV : MTIO_DSREG_FWD;
3118         error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
3119         softc->dsreg = MTIO_DSREG_REST;
3120
3121         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3122                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE);
3123
3124         xpt_release_ccb(ccb);
3125
3126         /*
3127          * If a spacing operation has failed, we need to invalidate
3128          * this mount.
3129          *
3130          * If the spacing operation was setmarks or to end of recorded data,
3131          * we no longer know our relative position.
3132          *
3133          * If the spacing operations was spacing files in reverse, we
3134          * take account of the residual, but still check against less
3135          * than zero- if we've gone negative, we must have hit BOT.
3136          *
3137          * If the spacing operations was spacing records in reverse and
3138          * we have a residual, we've either hit BOT or hit a filemark.
3139          * In the former case, we know our new record number (0). In
3140          * the latter case, we have absolutely no idea what the real
3141          * record number is- we've stopped between the end of the last
3142          * record in the previous file and the filemark that stopped
3143          * our spacing backwards.
3144          */
3145         if (error) {
3146                 softc->fileno = softc->blkno = (daddr_t) -1;
3147         } else if (code == SS_SETMARKS || code == SS_EOD) {
3148                 softc->fileno = softc->blkno = (daddr_t) -1;
3149         } else if (code == SS_FILEMARKS && softc->fileno != (daddr_t) -1) {
3150                 softc->fileno += (count - softc->last_ctl_resid);
3151                 if (softc->fileno < 0)  /* we must of hit BOT */
3152                         softc->fileno = 0;
3153                 softc->blkno = 0;
3154         } else if (code == SS_BLOCKS && softc->blkno != (daddr_t) -1) {
3155                 softc->blkno += (count - softc->last_ctl_resid);
3156                 if (count < 0) {
3157                         if (softc->last_ctl_resid || softc->blkno < 0) {
3158                                 if (softc->fileno == 0) {
3159                                         softc->blkno = 0;
3160                                 } else {
3161                                         softc->blkno = (daddr_t) -1;
3162                                 }
3163                         }
3164                 }
3165         }
3166         return (error);
3167 }
3168
3169 static int
3170 sawritefilemarks(struct cam_periph *periph, int nmarks, int setmarks)
3171 {
3172         union   ccb *ccb;
3173         struct  sa_softc *softc;
3174         int     error, nwm = 0;
3175
3176         softc = (struct sa_softc *)periph->softc;
3177         if (softc->open_rdonly)
3178                 return (EBADF);
3179
3180         ccb = cam_periph_getccb(periph, 1);
3181         /*
3182          * Clear residual because we will be using it.
3183          */
3184         softc->last_ctl_resid = 0;
3185
3186         softc->dsreg = MTIO_DSREG_FMK;
3187         /* this *must* not be retried */
3188         scsi_write_filemarks(&ccb->csio, 0, sadone, MSG_SIMPLE_Q_TAG,
3189             FALSE, setmarks, nmarks, SSD_FULL_SIZE, IO_TIMEOUT);
3190         softc->dsreg = MTIO_DSREG_REST;
3191
3192
3193         error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
3194
3195         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3196                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE);
3197
3198         if (error == 0 && nmarks) {
3199                 struct sa_softc *softc = (struct sa_softc *)periph->softc;
3200                 nwm = nmarks - softc->last_ctl_resid;
3201                 softc->filemarks += nwm;
3202         }
3203
3204         xpt_release_ccb(ccb);
3205
3206         /*
3207          * Update relative positions (if we're doing that).
3208          */
3209         if (error) {
3210                 softc->fileno = softc->blkno = (daddr_t) -1;
3211         } else if (softc->fileno != (daddr_t) -1) {
3212                 softc->fileno += nwm;
3213                 softc->blkno = 0;
3214         }
3215         return (error);
3216 }
3217
3218 static int
3219 sardpos(struct cam_periph *periph, int hard, u_int32_t *blkptr)
3220 {
3221         struct scsi_tape_position_data loc;
3222         union ccb *ccb;
3223         struct sa_softc *softc = (struct sa_softc *)periph->softc;
3224         int error;
3225
3226         /*
3227          * We try and flush any buffered writes here if we were writing
3228          * and we're trying to get hardware block position. It eats
3229          * up performance substantially, but I'm wary of drive firmware.
3230          *
3231          * I think that *logical* block position is probably okay-
3232          * but hardware block position might have to wait for data
3233          * to hit media to be valid. Caveat Emptor.
3234          */
3235
3236         if (hard && (softc->flags & SA_FLAG_TAPE_WRITTEN)) {
3237                 error = sawritefilemarks(periph, 0, 0);
3238                 if (error && error != EACCES)
3239                         return (error);
3240         }
3241
3242         ccb = cam_periph_getccb(periph, 1);
3243         scsi_read_position(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG,
3244             hard, &loc, SSD_FULL_SIZE, SCSIOP_TIMEOUT);
3245         softc->dsreg = MTIO_DSREG_RBSY;
3246         error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
3247         softc->dsreg = MTIO_DSREG_REST;
3248         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3249                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, 0);
3250
3251         if (error == 0) {
3252                 if (loc.flags & SA_RPOS_UNCERTAIN) {
3253                         error = EINVAL;         /* nothing is certain */
3254                 } else {
3255                         *blkptr = scsi_4btoul(loc.firstblk);
3256                 }
3257         }
3258
3259         xpt_release_ccb(ccb);
3260         return (error);
3261 }
3262
3263 static int
3264 sasetpos(struct cam_periph *periph, int hard, u_int32_t *blkptr)
3265 {
3266         union ccb *ccb;
3267         struct sa_softc *softc;
3268         int error;
3269
3270         /*
3271          * We used to try and flush any buffered writes here.
3272          * Now we push this onto user applications to either
3273          * flush the pending writes themselves (via a zero count
3274          * WRITE FILEMARKS command) or they can trust their tape
3275          * drive to do this correctly for them.
3276          */
3277
3278         softc = (struct sa_softc *)periph->softc;
3279         ccb = cam_periph_getccb(periph, 1);
3280
3281
3282         scsi_set_position(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG,
3283             hard, *blkptr, SSD_FULL_SIZE, SPACE_TIMEOUT);
3284
3285
3286         softc->dsreg = MTIO_DSREG_POS;
3287         error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
3288         softc->dsreg = MTIO_DSREG_REST;
3289         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3290                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, 0);
3291         xpt_release_ccb(ccb);
3292         /*
3293          * Note relative file && block number position as now unknown.
3294          */
3295         softc->fileno = softc->blkno = (daddr_t) -1;
3296         return (error);
3297 }
3298
3299 static int
3300 saretension(struct cam_periph *periph)
3301 {
3302         union ccb *ccb;
3303         struct sa_softc *softc;
3304         int error;
3305
3306         softc = (struct sa_softc *)periph->softc;
3307
3308         ccb = cam_periph_getccb(periph, 1);
3309
3310         /* It is safe to retry this operation */
3311         scsi_load_unload(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, FALSE,
3312             FALSE, TRUE,  TRUE, SSD_FULL_SIZE, ERASE_TIMEOUT);
3313
3314         softc->dsreg = MTIO_DSREG_TEN;
3315         error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
3316         softc->dsreg = MTIO_DSREG_REST;
3317
3318         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3319                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE);
3320         xpt_release_ccb(ccb);
3321         if (error == 0)
3322                 softc->fileno = softc->blkno = (daddr_t) 0;
3323         else
3324                 softc->fileno = softc->blkno = (daddr_t) -1;
3325         return (error);
3326 }
3327
3328 static int
3329 sareservereleaseunit(struct cam_periph *periph, int reserve)
3330 {
3331         union ccb *ccb;
3332         struct sa_softc *softc;
3333         int error;
3334
3335         softc = (struct sa_softc *)periph->softc;
3336         ccb = cam_periph_getccb(periph,  1);
3337
3338         /* It is safe to retry this operation */
3339         scsi_reserve_release_unit(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG,
3340             FALSE,  0, SSD_FULL_SIZE,  SCSIOP_TIMEOUT, reserve);
3341         softc->dsreg = MTIO_DSREG_RBSY;
3342         error = cam_periph_runccb(ccb, saerror, 0,
3343             SF_RETRY_UA | SF_NO_PRINT, softc->device_stats);
3344         softc->dsreg = MTIO_DSREG_REST;
3345         QFRLS(ccb);
3346         xpt_release_ccb(ccb);
3347
3348         /*
3349          * If the error was Illegal Request, then the device doesn't support
3350          * RESERVE/RELEASE. This is not an error.
3351          */
3352         if (error == EINVAL) {
3353                 error = 0;
3354         }
3355
3356         return (error);
3357 }
3358
3359 static int
3360 saloadunload(struct cam_periph *periph, int load)
3361 {
3362         union   ccb *ccb;
3363         struct  sa_softc *softc;
3364         int     error;
3365
3366         softc = (struct sa_softc *)periph->softc;
3367
3368         ccb = cam_periph_getccb(periph, 1);
3369
3370         /* It is safe to retry this operation */
3371         scsi_load_unload(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, FALSE,
3372             FALSE, FALSE, load, SSD_FULL_SIZE, REWIND_TIMEOUT);
3373
3374         softc->dsreg = (load)? MTIO_DSREG_LD : MTIO_DSREG_UNL;
3375         error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
3376         softc->dsreg = MTIO_DSREG_REST;
3377         QFRLS(ccb);
3378         xpt_release_ccb(ccb);
3379
3380         if (error || load == 0)
3381                 softc->fileno = softc->blkno = (daddr_t) -1;
3382         else if (error == 0)
3383                 softc->fileno = softc->blkno = (daddr_t) 0;
3384         return (error);
3385 }
3386
3387 static int
3388 saerase(struct cam_periph *periph, int longerase)
3389 {
3390
3391         union   ccb *ccb;
3392         struct  sa_softc *softc;
3393         int error;
3394
3395         softc = (struct sa_softc *)periph->softc;
3396         if (softc->open_rdonly)
3397                 return (EBADF);
3398
3399         ccb = cam_periph_getccb(periph, 1);
3400
3401         scsi_erase(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG, FALSE, longerase,
3402             SSD_FULL_SIZE, ERASE_TIMEOUT);
3403
3404         softc->dsreg = MTIO_DSREG_ZER;
3405         error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
3406         softc->dsreg = MTIO_DSREG_REST;
3407
3408         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3409                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE);
3410         xpt_release_ccb(ccb);
3411         return (error);
3412 }
3413
3414 #endif /* _KERNEL */
3415
3416 /*
3417  * Read tape block limits command.
3418  */
3419 void
3420 scsi_read_block_limits(struct ccb_scsiio *csio, u_int32_t retries,
3421                    void (*cbfcnp)(struct cam_periph *, union ccb *),
3422                    u_int8_t tag_action,
3423                    struct scsi_read_block_limits_data *rlimit_buf,
3424                    u_int8_t sense_len, u_int32_t timeout)
3425 {
3426         struct scsi_read_block_limits *scsi_cmd;
3427
3428         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_IN, tag_action,
3429              (u_int8_t *)rlimit_buf, sizeof(*rlimit_buf), sense_len,
3430              sizeof(*scsi_cmd), timeout);
3431
3432         scsi_cmd = (struct scsi_read_block_limits *)&csio->cdb_io.cdb_bytes;
3433         bzero(scsi_cmd, sizeof(*scsi_cmd));
3434         scsi_cmd->opcode = READ_BLOCK_LIMITS;
3435 }
3436
3437 void
3438 scsi_sa_read_write(struct ccb_scsiio *csio, u_int32_t retries,
3439                    void (*cbfcnp)(struct cam_periph *, union ccb *),
3440                    u_int8_t tag_action, int readop, int sli,
3441                    int fixed, u_int32_t length, u_int8_t *data_ptr,
3442                    u_int32_t dxfer_len, u_int8_t sense_len, u_int32_t timeout)
3443 {
3444         struct scsi_sa_rw *scsi_cmd;
3445
3446         scsi_cmd = (struct scsi_sa_rw *)&csio->cdb_io.cdb_bytes;
3447         scsi_cmd->opcode = readop ? SA_READ : SA_WRITE;
3448         scsi_cmd->sli_fixed = 0;
3449         if (sli && readop)
3450                 scsi_cmd->sli_fixed |= SAR_SLI;
3451         if (fixed)
3452                 scsi_cmd->sli_fixed |= SARW_FIXED;
3453         scsi_ulto3b(length, scsi_cmd->length);
3454         scsi_cmd->control = 0;
3455
3456         cam_fill_csio(csio, retries, cbfcnp, readop ? CAM_DIR_IN : CAM_DIR_OUT,
3457             tag_action, data_ptr, dxfer_len, sense_len,
3458             sizeof(*scsi_cmd), timeout);
3459 }
3460
3461 void
3462 scsi_load_unload(struct ccb_scsiio *csio, u_int32_t retries,
3463                  void (*cbfcnp)(struct cam_periph *, union ccb *),
3464                  u_int8_t tag_action, int immediate, int eot,
3465                  int reten, int load, u_int8_t sense_len,
3466                  u_int32_t timeout)
3467 {
3468         struct scsi_load_unload *scsi_cmd;
3469
3470         scsi_cmd = (struct scsi_load_unload *)&csio->cdb_io.cdb_bytes;
3471         bzero(scsi_cmd, sizeof(*scsi_cmd));
3472         scsi_cmd->opcode = LOAD_UNLOAD;
3473         if (immediate)
3474                 scsi_cmd->immediate = SLU_IMMED;
3475         if (eot)
3476                 scsi_cmd->eot_reten_load |= SLU_EOT;
3477         if (reten)
3478                 scsi_cmd->eot_reten_load |= SLU_RETEN;
3479         if (load)
3480                 scsi_cmd->eot_reten_load |= SLU_LOAD;
3481
3482         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action,
3483             NULL, 0, sense_len, sizeof(*scsi_cmd), timeout);
3484 }
3485
3486 void
3487 scsi_rewind(struct ccb_scsiio *csio, u_int32_t retries,
3488             void (*cbfcnp)(struct cam_periph *, union ccb *),
3489             u_int8_t tag_action, int immediate, u_int8_t sense_len,
3490             u_int32_t timeout)
3491 {
3492         struct scsi_rewind *scsi_cmd;
3493
3494         scsi_cmd = (struct scsi_rewind *)&csio->cdb_io.cdb_bytes;
3495         bzero(scsi_cmd, sizeof(*scsi_cmd));
3496         scsi_cmd->opcode = REWIND;
3497         if (immediate)
3498                 scsi_cmd->immediate = SREW_IMMED;
3499
3500         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
3501             0, sense_len, sizeof(*scsi_cmd), timeout);
3502 }
3503
3504 void
3505 scsi_space(struct ccb_scsiio *csio, u_int32_t retries,
3506            void (*cbfcnp)(struct cam_periph *, union ccb *),
3507            u_int8_t tag_action, scsi_space_code code,
3508            u_int32_t count, u_int8_t sense_len, u_int32_t timeout)
3509 {
3510         struct scsi_space *scsi_cmd;
3511
3512         scsi_cmd = (struct scsi_space *)&csio->cdb_io.cdb_bytes;
3513         scsi_cmd->opcode = SPACE;
3514         scsi_cmd->code = code;
3515         scsi_ulto3b(count, scsi_cmd->count);
3516         scsi_cmd->control = 0;
3517
3518         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
3519             0, sense_len, sizeof(*scsi_cmd), timeout);
3520 }
3521
3522 void
3523 scsi_write_filemarks(struct ccb_scsiio *csio, u_int32_t retries,
3524                      void (*cbfcnp)(struct cam_periph *, union ccb *),
3525                      u_int8_t tag_action, int immediate, int setmark,
3526                      u_int32_t num_marks, u_int8_t sense_len,
3527                      u_int32_t timeout)
3528 {
3529         struct scsi_write_filemarks *scsi_cmd;
3530
3531         scsi_cmd = (struct scsi_write_filemarks *)&csio->cdb_io.cdb_bytes;
3532         bzero(scsi_cmd, sizeof(*scsi_cmd));
3533         scsi_cmd->opcode = WRITE_FILEMARKS;
3534         if (immediate)
3535                 scsi_cmd->byte2 |= SWFMRK_IMMED;
3536         if (setmark)
3537                 scsi_cmd->byte2 |= SWFMRK_WSMK;
3538
3539         scsi_ulto3b(num_marks, scsi_cmd->num_marks);
3540
3541         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
3542             0, sense_len, sizeof(*scsi_cmd), timeout);
3543 }
3544
3545 /*
3546  * The reserve and release unit commands differ only by their opcodes.
3547  */
3548 void
3549 scsi_reserve_release_unit(struct ccb_scsiio *csio, u_int32_t retries,
3550                           void (*cbfcnp)(struct cam_periph *, union ccb *),
3551                           u_int8_t tag_action, int third_party,
3552                           int third_party_id, u_int8_t sense_len,
3553                           u_int32_t timeout, int reserve)
3554 {
3555         struct scsi_reserve_release_unit *scsi_cmd;
3556
3557         scsi_cmd = (struct scsi_reserve_release_unit *)&csio->cdb_io.cdb_bytes;
3558         bzero(scsi_cmd, sizeof(*scsi_cmd));
3559
3560         if (reserve)
3561                 scsi_cmd->opcode = RESERVE_UNIT;
3562         else
3563                 scsi_cmd->opcode = RELEASE_UNIT;
3564
3565         if (third_party) {
3566                 scsi_cmd->lun_thirdparty |= SRRU_3RD_PARTY;
3567                 scsi_cmd->lun_thirdparty |=
3568                         ((third_party_id << SRRU_3RD_SHAMT) & SRRU_3RD_MASK);
3569         }
3570
3571         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
3572             0, sense_len, sizeof(*scsi_cmd), timeout);
3573 }
3574
3575 void
3576 scsi_erase(struct ccb_scsiio *csio, u_int32_t retries,
3577            void (*cbfcnp)(struct cam_periph *, union ccb *),
3578            u_int8_t tag_action, int immediate, int long_erase,
3579            u_int8_t sense_len, u_int32_t timeout)
3580 {
3581         struct scsi_erase *scsi_cmd;
3582
3583         scsi_cmd = (struct scsi_erase *)&csio->cdb_io.cdb_bytes;
3584         bzero(scsi_cmd, sizeof(*scsi_cmd));
3585
3586         scsi_cmd->opcode = ERASE;
3587
3588         if (immediate)
3589                 scsi_cmd->lun_imm_long |= SE_IMMED;
3590
3591         if (long_erase)
3592                 scsi_cmd->lun_imm_long |= SE_LONG;
3593
3594         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
3595             0, sense_len, sizeof(*scsi_cmd), timeout);
3596 }
3597
3598 /*
3599  * Read Tape Position command.
3600  */
3601 void
3602 scsi_read_position(struct ccb_scsiio *csio, u_int32_t retries,
3603                    void (*cbfcnp)(struct cam_periph *, union ccb *),
3604                    u_int8_t tag_action, int hardsoft,
3605                    struct scsi_tape_position_data *sbp,
3606                    u_int8_t sense_len, u_int32_t timeout)
3607 {
3608         struct scsi_tape_read_position *scmd;
3609
3610         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_IN, tag_action,
3611             (u_int8_t *)sbp, sizeof (*sbp), sense_len, sizeof(*scmd), timeout);
3612         scmd = (struct scsi_tape_read_position *)&csio->cdb_io.cdb_bytes;
3613         bzero(scmd, sizeof(*scmd));
3614         scmd->opcode = READ_POSITION;
3615         scmd->byte1 = hardsoft;
3616 }
3617
3618 /*
3619  * Set Tape Position command.
3620  */
3621 void
3622 scsi_set_position(struct ccb_scsiio *csio, u_int32_t retries,
3623                    void (*cbfcnp)(struct cam_periph *, union ccb *),
3624                    u_int8_t tag_action, int hardsoft, u_int32_t blkno,
3625                    u_int8_t sense_len, u_int32_t timeout)
3626 {
3627         struct scsi_tape_locate *scmd;
3628
3629         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action,
3630             (u_int8_t *)NULL, 0, sense_len, sizeof(*scmd), timeout);
3631         scmd = (struct scsi_tape_locate *)&csio->cdb_io.cdb_bytes;
3632         bzero(scmd, sizeof(*scmd));
3633         scmd->opcode = LOCATE;
3634         if (hardsoft)
3635                 scmd->byte1 |= SA_SPOS_BT;
3636         scsi_ulto4b(blkno, scmd->blkaddr);
3637 }