sys/bus/cam/scsi/scsi_sa.c

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