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 1.35 2008/05/18 20:30:20 pavalos 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);
 501                         cam_periph_unlock(periph);
 502                         return (0);
 503                 }
 504         }
 505
 506         if (error) {
 507                 cam_periph_unhold(periph);
 508                 cam_periph_unlock(periph);
 509                 cam_periph_release(periph);
 510                 return (error);
 511         }
 512
 513         saprevent(periph, PR_PREVENT);
 514         softc->flags |= SA_FLAG_OPEN;
 515
 516         cam_periph_unhold(periph);
 517         cam_periph_unlock(periph);
 518         return (error);
 519 }
 520
 521 static int
 522 saclose(struct dev_close_args *ap)
 523 {
 524         cdev_t dev = ap->a_head.a_dev;
 525         struct  cam_periph *periph;
 526         struct  sa_softc *softc;
 527         int     unit, mode, error, writing, tmp;
 528         int     closedbits = SA_FLAG_OPEN;
 529
 530         unit = SAUNIT(dev);
 531         mode = SAMODE(dev);
 532         periph = cam_extend_get(saperiphs, unit);
 533         if (periph == NULL)
 534                 return (ENXIO);
 535
 536         cam_periph_lock(periph);
 537
 538         softc = (struct sa_softc *)periph->softc;
 539
 540         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE|CAM_DEBUG_INFO,
 541             ("saclose(%d): dev=0x%x softc=0x%x\n", unit, unit, softc->flags));
 542
 543
 544         softc->open_rdonly = 0;
 545         if (SA_IS_CTRL(dev)) {
 546                 softc->ctrl_mode = 0;
 547                 cam_periph_unlock(periph);
 548                 cam_periph_release(periph);
 549                 return (0);
 550         }
 551
 552         if (softc->open_pending_mount) {
 553                 softc->flags &= ~SA_FLAG_OPEN;
 554                 softc->open_pending_mount = 0;
 555                 cam_periph_unlock(periph);
 556                 cam_periph_release(periph);
 557                 return (0);
 558         }
 559
 560         if ((error = cam_periph_hold(periph, 0)) != 0) {
 561                 cam_periph_unlock(periph);
 562                 return (error);
 563         }
 564
 565         /*
 566          * Were we writing the tape?
 567          */
 568         writing = (softc->flags & SA_FLAG_TAPE_WRITTEN) != 0;
 569
 570         /*
 571          * See whether or not we need to write filemarks. If this
 572          * fails, we probably have to assume we've lost tape
 573          * position.
 574          */
 575         error = sacheckeod(periph);
 576         if (error) {
 577                 xpt_print(periph->path,
 578                     "failed to write terminating filemark(s)\n");
 579                 softc->flags |= SA_FLAG_TAPE_FROZEN;
 580         }
 581
 582         /*
 583          * Whatever we end up doing, allow users to eject tapes from here on.
 584          */
 585         saprevent(periph, PR_ALLOW);
 586
 587         /*
 588          * Decide how to end...
 589          */
 590         if ((softc->flags & SA_FLAG_TAPE_MOUNTED) == 0) {
 591                 closedbits |= SA_FLAG_TAPE_FROZEN;
 592         } else switch (mode) {
 593         case SA_MODE_OFFLINE:
 594                 /*
 595                  * An 'offline' close is an unconditional release of
 596                  * frozen && mount conditions, irrespective of whether
 597                  * these operations succeeded. The reason for this is
 598                  * to allow at least some kind of programmatic way
 599                  * around our state getting all fouled up. If somebody
 600                  * issues an 'offline' command, that will be allowed
 601                  * to clear state.
 602                  */
 603                 sarewind(periph);
 604                 saloadunload(periph, FALSE);
 605                 closedbits |= SA_FLAG_TAPE_MOUNTED|SA_FLAG_TAPE_FROZEN;
 606                 break;
 607         case SA_MODE_REWIND:
 608                 /*
 609                  * If the rewind fails, return an error- if anyone cares,
 610                  * but not overwriting any previous error.
 611                  *
 612                  * We don't clear the notion of mounted here, but we do
 613                  * clear the notion of frozen if we successfully rewound.
 614                  */
 615                 tmp = sarewind(periph);
 616                 if (tmp) {
 617                         if (error != 0)
 618                                 error = tmp;
 619                 } else {
 620                         closedbits |= SA_FLAG_TAPE_FROZEN;
 621                 }
 622                 break;
 623         case SA_MODE_NOREWIND:
 624                 /*
 625                  * If we're not rewinding/unloading the tape, find out
 626                  * whether we need to back up over one of two filemarks
 627                  * we wrote (if we wrote two filemarks) so that appends
 628                  * from this point on will be sane.
 629                  */
 630                 if (error == 0 && writing && (softc->quirks & SA_QUIRK_2FM)) {
 631                         tmp = saspace(periph, -1, SS_FILEMARKS);
 632                         if (tmp) {
 633                                 xpt_print(periph->path, "unable to backspace "
 634                                     "over one of double filemarks at end of "
 635                                     "tape\n");
 636                                 xpt_print(periph->path, "it is possible that "
 637                                     "this device needs a SA_QUIRK_1FM quirk set"
 638                                     "for it\n");
 639                                 softc->flags |= SA_FLAG_TAPE_FROZEN;
 640                         }
 641                 }
 642                 break;
 643         default:
 644                 xpt_print(periph->path, "unknown mode 0x%x in saclose\n", mode);
 645                 /* NOTREACHED */
 646                 break;
 647         }
 648
 649         /*
 650          * We wish to note here that there are no more filemarks to be written.
 651          */
 652         softc->filemarks = 0;
 653         softc->flags &= ~SA_FLAG_TAPE_WRITTEN;
 654
 655         /*
 656          * And we are no longer open for business.
 657          */
 658         softc->flags &= ~closedbits;
 659
 660         /*
 661          * Inform users if tape state if frozen....
 662          */
 663         if (softc->flags & SA_FLAG_TAPE_FROZEN) {
 664                 xpt_print(periph->path, "tape is now frozen- use an OFFLINE, "
 665                     "REWIND or MTEOM command to clear this state.\n");
 666         }
 667
 668         /* release the device if it is no longer mounted */
 669         if ((softc->flags & SA_FLAG_TAPE_MOUNTED) == 0)
 670                 sareservereleaseunit(periph, FALSE);
 671
 672         cam_periph_unhold(periph);
 673         cam_periph_unlock(periph);
 674         cam_periph_release(periph);
 675
 676         return (error);
 677 }
 678
 679 /*
 680  * Actually translate the requested transfer into one the physical driver
 681  * can understand.  The transfer is described by a buf and will include
 682  * only one physical transfer.
 683  */
 684 static int
 685 sastrategy(struct dev_strategy_args *ap)
 686 {
 687         cdev_t dev = ap->a_head.a_dev;
 688         struct bio *bio = ap->a_bio;
 689         struct buf *bp = bio->bio_buf;
 690         struct cam_periph *periph;
 691         struct sa_softc *softc;
 692         u_int  unit;
 693
 694         if (SA_IS_CTRL(dev)) {
 695                 bp->b_error = EINVAL;
 696                 goto bad;
 697         }
 698         unit = SAUNIT(dev);
 699         periph = cam_extend_get(saperiphs, unit);
 700         if (periph == NULL) {
 701                 bp->b_error = ENXIO;
 702                 goto bad;
 703         }
 704         cam_periph_lock(periph);
 705
 706         softc = (struct sa_softc *)periph->softc;
 707
 708         if (softc->flags & SA_FLAG_INVALID) {
 709                 cam_periph_unlock(periph);
 710                 bp->b_error = ENXIO;
 711                 goto bad;
 712         }
 713
 714         if (softc->flags & SA_FLAG_TAPE_FROZEN) {
 715                 cam_periph_unlock(periph);
 716                 bp->b_error = EPERM;
 717                 goto bad;
 718         }
 719
 720         /*
 721          * This should actually never occur as the write(2)
 722          * system call traps attempts to write to a read-only
 723          * file descriptor.
 724          */
 725         if (bp->b_cmd == BUF_CMD_WRITE && softc->open_rdonly) {
 726                 cam_periph_unlock(periph);
 727                 bp->b_error = EBADF;
 728                 goto bad;
 729         }
 730
 731         if (softc->open_pending_mount) {
 732                 int error = samount(periph, 0, dev);
 733                 if (error) {
 734                         cam_periph_unlock(periph);
 735                         bp->b_error = ENXIO;
 736                         goto bad;
 737                 }
 738                 saprevent(periph, PR_PREVENT);
 739                 softc->open_pending_mount = 0;
 740         }
 741
 742         /*
 743          * If it's a null transfer, return immediately
 744          */
 745         if (bp->b_bcount == 0) {
 746                 cam_periph_unlock(periph);
 747                 goto done;
 748         }
 749
 750         /* valid request?  */
 751         if (softc->flags & SA_FLAG_FIXED) {
 752                 /*
 753                  * Fixed block device.  The byte count must
 754                  * be a multiple of our block size.
 755                  */
 756                 if (((softc->blk_mask != ~0) &&
 757                     ((bp->b_bcount & softc->blk_mask) != 0)) ||
 758                     ((softc->blk_mask == ~0) &&
 759                     ((bp->b_bcount % softc->min_blk) != 0))) {
 760                         xpt_print(periph->path, "Invalid request.  Fixed block "
 761                             "device requests must be a multiple of %d bytes\n",
 762                             softc->min_blk);
 763                         cam_periph_unlock(periph);
 764                         bp->b_error = EINVAL;
 765                         goto bad;
 766                 }
 767         } else if ((bp->b_bcount > softc->max_blk) ||
 768                    (bp->b_bcount < softc->min_blk) ||
 769                    (bp->b_bcount & softc->blk_mask) != 0) {
 770
 771                 xpt_print_path(periph->path);
 772                 kprintf("Invalid request.  Variable block "
 773                     "device requests must be ");
 774                 if (softc->blk_mask != 0) {
 775                         kprintf("a multiple of %d ", (0x1 << softc->blk_gran));
 776                 }
 777                 kprintf("between %d and %d bytes\n", softc->min_blk,
 778                     softc->max_blk);
 779                 cam_periph_unlock(periph);
 780                 bp->b_error = EINVAL;
 781                 goto bad;
 782         }
 783
 784         /*
 785          * Place it at the end of the queue.
 786          */
 787         bioq_insert_tail(&softc->bio_queue, bio);
 788         softc->queue_count++;
 789 #if     0
 790         CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
 791             ("sastrategy: queuing a %ld %s byte %s\n", bp->bio_bcount,
 792             (softc->flags & SA_FLAG_FIXED)?  "fixed" : "variable",
 793             (bp->bio_cmd == BIO_READ)? "read" : "write"));
 794 #endif
 795         if (softc->queue_count > 1) {
 796                 CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
 797                     ("sastrategy: queue count now %d\n", softc->queue_count));
 798         }
 799
 800         /*
 801          * Schedule ourselves for performing the work.
 802          */
 803         xpt_schedule(periph, 1);
 804         cam_periph_unlock(periph);
 805
 806         return(0);
 807 bad:
 808         bp->b_flags |= B_ERROR;
 809 done:
 810
 811         /*
 812          * Correctly set the buf to indicate a completed xfer
 813          */
 814         bp->b_resid = bp->b_bcount;
 815         biodone(bio);
 816         return(0);
 817 }
 818
 819
 820 #define PENDING_MOUNT_CHECK(softc, periph, dev)         \
 821         if (softc->open_pending_mount) {                \
 822                 error = samount(periph, 0, dev);        \
 823                 if (error) {                            \
 824                         break;                          \
 825                 }                                       \
 826                 saprevent(periph, PR_PREVENT);          \
 827                 softc->open_pending_mount = 0;          \
 828         }
 829
 830 static int
 831 saioctl(struct dev_ioctl_args *ap)
 832 {
 833         cdev_t dev = ap->a_head.a_dev;
 834         caddr_t addr = ap->a_data;
 835         struct cam_periph *periph;
 836         struct sa_softc *softc;
 837         scsi_space_code spaceop;
 838         int didlockperiph = 0;
 839         int unit;
 840         int mode;
 841         int error = 0;
 842
 843         unit = SAUNIT(dev);
 844         mode = SAMODE(dev);
 845         error = 0;              /* shut up gcc */
 846         spaceop = 0;            /* shut up gcc */
 847
 848         periph = cam_extend_get(saperiphs, unit);
 849         if (periph == NULL)
 850                 return (ENXIO);
 851
 852         cam_periph_lock(periph);
 853         softc = (struct sa_softc *)periph->softc;
 854
 855         /*
 856          * Check for control mode accesses. We allow MTIOCGET and
 857          * MTIOCERRSTAT (but need to be the only one open in order
 858          * to clear latched status), and MTSETBSIZE, MTSETDNSTY
 859          * and MTCOMP (but need to be the only one accessing this
 860          * device to run those).
 861          */
 862
 863         if (SA_IS_CTRL(dev)) {
 864                 switch (ap->a_cmd) {
 865                 case MTIOCGETEOTMODEL:
 866                 case MTIOCGET:
 867                         break;
 868                 case MTIOCERRSTAT:
 869                         /*
 870                          * If the periph isn't already locked, lock it
 871                          * so our MTIOCERRSTAT can reset latched error stats.
 872                          *
 873                          * If the periph is already locked, skip it because
 874                          * we're just getting status and it'll be up to the
 875                          * other thread that has this device open to do
 876                          * an MTIOCERRSTAT that would clear latched status.
 877                          */
 878                         if ((periph->flags & CAM_PERIPH_LOCKED) == 0) {
 879                                 error = cam_periph_hold(periph, PCATCH);
 880                                 if (error != 0) {
 881                                         return (error);
 882                                 }
 883                                 didlockperiph = 1;
 884                         }
 885                         break;
 886
 887                 case MTIOCTOP:
 888                 {
 889                         struct mtop *mt = (struct mtop *) addr;
 890
 891                         /*
 892                          * Check to make sure it's an OP we can perform
 893                          * with no media inserted.
 894                          */
 895                         switch (mt->mt_op) {
 896                         case MTSETBSIZ:
 897                         case MTSETDNSTY:
 898                         case MTCOMP:
 899                                 mt = NULL;
 900                                 /* FALLTHROUGH */
 901                         default:
 902                                 break;
 903                         }
 904                         if (mt != NULL) {
 905                                 break;
 906                         }
 907                         /* FALLTHROUGH */
 908                 }
 909                 case MTIOCSETEOTMODEL:
 910                         /*
 911                          * We need to acquire the peripheral here rather
 912                          * than at open time because we are sharing writable
 913                          * access to data structures.
 914                          */
 915                         error = cam_periph_hold(periph, PCATCH);
 916                         if (error != 0) {
 917                                 return (error);
 918                         }
 919                         didlockperiph = 1;
 920                         break;
 921
 922                 default:
 923                         return (EINVAL);
 924                 }
 925         }
 926
 927         /*
 928          * Find the device that the user is talking about
 929          */
 930         switch (ap->a_cmd) {
 931         case MTIOCGET:
 932         {
 933                 struct mtget *g = (struct mtget *)addr;
 934
 935                 /*
 936                  * If this isn't the control mode device, actually go out
 937                  * and ask the drive again what it's set to.
 938                  */
 939                 if (!SA_IS_CTRL(dev) && !softc->open_pending_mount) {
 940                         u_int8_t write_protect;
 941                         int comp_enabled, comp_supported;
 942                         error = sagetparams(periph, SA_PARAM_ALL,
 943                             &softc->media_blksize, &softc->media_density,
 944                             &softc->media_numblks, &softc->buffer_mode,
 945                             &write_protect, &softc->speed, &comp_supported,
 946                             &comp_enabled, &softc->comp_algorithm, NULL);
 947                         if (error)
 948                                 break;
 949                         if (write_protect)
 950                                 softc->flags |= SA_FLAG_TAPE_WP;
 951                         else
 952                                 softc->flags &= ~SA_FLAG_TAPE_WP;
 953                         softc->flags &= ~(SA_FLAG_COMP_SUPP|
 954                             SA_FLAG_COMP_ENABLED|SA_FLAG_COMP_UNSUPP);
 955                         if (comp_supported) {
 956                                 if (softc->saved_comp_algorithm == 0)
 957                                         softc->saved_comp_algorithm =
 958                                             softc->comp_algorithm;
 959                                 softc->flags |= SA_FLAG_COMP_SUPP;
 960                                 if (comp_enabled)
 961                                         softc->flags |= SA_FLAG_COMP_ENABLED;
 962                         } else
 963                                 softc->flags |= SA_FLAG_COMP_UNSUPP;
 964                 }
 965                 bzero(g, sizeof(struct mtget));
 966                 g->mt_type = MT_ISAR;
 967                 if (softc->flags & SA_FLAG_COMP_UNSUPP) {
 968                         g->mt_comp = MT_COMP_UNSUPP;
 969                         g->mt_comp0 = MT_COMP_UNSUPP;
 970                         g->mt_comp1 = MT_COMP_UNSUPP;
 971                         g->mt_comp2 = MT_COMP_UNSUPP;
 972                         g->mt_comp3 = MT_COMP_UNSUPP;
 973                 } else {
 974                         if ((softc->flags & SA_FLAG_COMP_ENABLED) == 0) {
 975                                 g->mt_comp = MT_COMP_DISABLED;
 976                         } else {
 977                                 g->mt_comp = softc->comp_algorithm;
 978                         }
 979                         g->mt_comp0 = softc->comp_algorithm;
 980                         g->mt_comp1 = softc->comp_algorithm;
 981                         g->mt_comp2 = softc->comp_algorithm;
 982                         g->mt_comp3 = softc->comp_algorithm;
 983                 }
 984                 g->mt_density = softc->media_density;
 985                 g->mt_density0 = softc->media_density;
 986                 g->mt_density1 = softc->media_density;
 987                 g->mt_density2 = softc->media_density;
 988                 g->mt_density3 = softc->media_density;
 989                 g->mt_blksiz = softc->media_blksize;
 990                 g->mt_blksiz0 = softc->media_blksize;
 991                 g->mt_blksiz1 = softc->media_blksize;
 992                 g->mt_blksiz2 = softc->media_blksize;
 993                 g->mt_blksiz3 = softc->media_blksize;
 994                 g->mt_fileno = softc->fileno;
 995                 g->mt_blkno = softc->blkno;
 996                 g->mt_dsreg = (short) softc->dsreg;
 997                 /*
 998                  * Yes, we know that this is likely to overflow
 999                  */
1000                 if (softc->last_resid_was_io) {
1001                         if ((g->mt_resid = (short) softc->last_io_resid) != 0) {
1002                                 if (SA_IS_CTRL(dev) == 0 || didlockperiph) {
1003                                         softc->last_io_resid = 0;
1004                                 }
1005                         }
1006                 } else {
1007                         if ((g->mt_resid = (short)softc->last_ctl_resid) != 0) {
1008                                 if (SA_IS_CTRL(dev) == 0 || didlockperiph) {
1009                                         softc->last_ctl_resid = 0;
1010                                 }
1011                         }
1012                 }
1013                 error = 0;
1014                 break;
1015         }
1016         case MTIOCERRSTAT:
1017         {
1018                 struct scsi_tape_errors *sep =
1019                     &((union mterrstat *)addr)->scsi_errstat;
1020
1021                 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
1022                     ("saioctl: MTIOCERRSTAT\n"));
1023
1024                 bzero(sep, sizeof(*sep));
1025                 sep->io_resid = softc->last_io_resid;
1026                 bcopy((caddr_t) &softc->last_io_sense, sep->io_sense,
1027                     sizeof (sep->io_sense));
1028                 bcopy((caddr_t) &softc->last_io_cdb, sep->io_cdb,
1029                     sizeof (sep->io_cdb));
1030                 sep->ctl_resid = softc->last_ctl_resid;
1031                 bcopy((caddr_t) &softc->last_ctl_sense, sep->ctl_sense,
1032                     sizeof (sep->ctl_sense));
1033                 bcopy((caddr_t) &softc->last_ctl_cdb, sep->ctl_cdb,
1034                     sizeof (sep->ctl_cdb));
1035
1036                 if ((SA_IS_CTRL(dev) == 0 && softc->open_pending_mount) ||
1037                     didlockperiph)
1038                         bzero((caddr_t) &softc->errinfo,
1039                             sizeof (softc->errinfo));
1040                 error = 0;
1041                 break;
1042         }
1043         case MTIOCTOP:
1044         {
1045                 struct mtop *mt;
1046                 int    count;
1047
1048                 PENDING_MOUNT_CHECK(softc, periph, dev);
1049
1050                 mt = (struct mtop *)addr;
1051
1052                 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
1053                          ("saioctl: op=0x%x count=0x%x\n",
1054                           mt->mt_op, mt->mt_count));
1055
1056                 count = mt->mt_count;
1057                 switch (mt->mt_op) {
1058                 case MTWEOF:    /* write an end-of-file marker */
1059                         /*
1060                          * We don't need to clear the SA_FLAG_TAPE_WRITTEN
1061                          * flag because by keeping track of filemarks
1062                          * we have last written we know ehether or not
1063                          * we need to write more when we close the device.
1064                          */
1065                         error = sawritefilemarks(periph, count, FALSE);
1066                         break;
1067                 case MTWSS:     /* write a setmark */
1068                         error = sawritefilemarks(periph, count, TRUE);
1069                         break;
1070                 case MTBSR:     /* backward space record */
1071                 case MTFSR:     /* forward space record */
1072                 case MTBSF:     /* backward space file */
1073                 case MTFSF:     /* forward space file */
1074                 case MTBSS:     /* backward space setmark */
1075                 case MTFSS:     /* forward space setmark */
1076                 case MTEOD:     /* space to end of recorded medium */
1077                 {
1078                         int nmarks;
1079
1080                         spaceop = SS_FILEMARKS;
1081                         nmarks = softc->filemarks;
1082                         error = sacheckeod(periph);
1083                         if (error) {
1084                                 xpt_print(periph->path,
1085                                     "EOD check prior to spacing failed\n");
1086                                 softc->flags |= SA_FLAG_EIO_PENDING;
1087                                 break;
1088                         }
1089                         nmarks -= softc->filemarks;
1090                         switch(mt->mt_op) {
1091                         case MTBSR:
1092                                 count = -count;
1093                                 /* FALLTHROUGH */
1094                         case MTFSR:
1095                                 spaceop = SS_BLOCKS;
1096                                 break;
1097                         case MTBSF:
1098                                 count = -count;
1099                                 /* FALLTHROUGH */
1100                         case MTFSF:
1101                                 break;
1102                         case MTBSS:
1103                                 count = -count;
1104                                 /* FALLTHROUGH */
1105                         case MTFSS:
1106                                 spaceop = SS_SETMARKS;
1107                                 break;
1108                         case MTEOD:
1109                                 spaceop = SS_EOD;
1110                                 count = 0;
1111                                 nmarks = 0;
1112                                 break;
1113                         default:
1114                                 error = EINVAL;
1115                                 break;
1116                         }
1117                         if (error)
1118                                 break;
1119
1120                         nmarks = softc->filemarks;
1121                         /*
1122                          * XXX: Why are we checking again?
1123                          */
1124                         error = sacheckeod(periph);
1125                         if (error)
1126                                 break;
1127                         nmarks -= softc->filemarks;
1128                         error = saspace(periph, count - nmarks, spaceop);
1129                         /*
1130                          * At this point, clear that we've written the tape
1131                          * and that we've written any filemarks. We really
1132                          * don't know what the applications wishes to do next-
1133                          * the sacheckeod's will make sure we terminated the
1134                          * tape correctly if we'd been writing, but the next
1135                          * action the user application takes will set again
1136                          * whether we need to write filemarks.
1137                          */
1138                         softc->flags &=
1139                             ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
1140                         softc->filemarks = 0;
1141                         break;
1142                 }
1143                 case MTREW:     /* rewind */
1144                         PENDING_MOUNT_CHECK(softc, periph, dev);
1145                         sacheckeod(periph);
1146                         error = sarewind(periph);
1147                         /* see above */
1148                         softc->flags &=
1149                             ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
1150                         softc->flags &= ~SA_FLAG_ERR_PENDING;
1151                         softc->filemarks = 0;
1152                         break;
1153                 case MTERASE:   /* erase */
1154                         PENDING_MOUNT_CHECK(softc, periph, dev);
1155                         error = saerase(periph, count);
1156                         softc->flags &=
1157                             ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
1158                         softc->flags &= ~SA_FLAG_ERR_PENDING;
1159                         break;
1160                 case MTRETENS:  /* re-tension tape */
1161                         PENDING_MOUNT_CHECK(softc, periph, dev);
1162                         error = saretension(periph);
1163                         softc->flags &=
1164                             ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
1165                         softc->flags &= ~SA_FLAG_ERR_PENDING;
1166                         break;
1167                 case MTOFFL:    /* rewind and put the drive offline */
1168
1169                         PENDING_MOUNT_CHECK(softc, periph, dev);
1170
1171                         sacheckeod(periph);
1172                         /* see above */
1173                         softc->flags &= ~SA_FLAG_TAPE_WRITTEN;
1174                         softc->filemarks = 0;
1175
1176                         error = sarewind(periph);
1177                         /* clear the frozen flag anyway */
1178                         softc->flags &= ~SA_FLAG_TAPE_FROZEN;
1179
1180                         /*
1181                          * Be sure to allow media removal before ejecting.
1182                          */
1183
1184                         saprevent(periph, PR_ALLOW);
1185                         if (error == 0) {
1186                                 error = saloadunload(periph, FALSE);
1187                                 if (error == 0) {
1188                                         softc->flags &= ~SA_FLAG_TAPE_MOUNTED;
1189                                 }
1190                         }
1191                         break;
1192
1193                 case MTNOP:     /* no operation, sets status only */
1194                 case MTCACHE:   /* enable controller cache */
1195                 case MTNOCACHE: /* disable controller cache */
1196                         error = 0;
1197                         break;
1198
1199                 case MTSETBSIZ: /* Set block size for device */
1200
1201                         PENDING_MOUNT_CHECK(softc, periph, dev);
1202
1203                         error = sasetparams(periph, SA_PARAM_BLOCKSIZE, count,
1204                                             0, 0, 0);
1205                         if (error == 0) {
1206                                 softc->last_media_blksize =
1207                                     softc->media_blksize;
1208                                 softc->media_blksize = count;
1209                                 if (count) {
1210                                         softc->flags |= SA_FLAG_FIXED;
1211                                         if (powerof2(count)) {
1212                                                 softc->blk_shift =
1213                                                     ffs(count) - 1;
1214                                                 softc->blk_mask = count - 1;
1215                                         } else {
1216                                                 softc->blk_mask = ~0;
1217                                                 softc->blk_shift = 0;
1218                                         }
1219                                         /*
1220                                          * Make the user's desire 'persistent'.
1221                                          */
1222                                         softc->quirks &= ~SA_QUIRK_VARIABLE;
1223                                         softc->quirks |= SA_QUIRK_FIXED;
1224                                 } else {
1225                                         softc->flags &= ~SA_FLAG_FIXED;
1226                                         if (softc->max_blk == 0) {
1227                                                 softc->max_blk = ~0;
1228                                         }
1229                                         softc->blk_shift = 0;
1230                                         if (softc->blk_gran != 0) {
1231                                                 softc->blk_mask =
1232                                                     softc->blk_gran - 1;
1233                                         } else {
1234                                                 softc->blk_mask = 0;
1235                                         }
1236                                         /*
1237                                          * Make the user's desire 'persistent'.
1238                                          */
1239                                         softc->quirks |= SA_QUIRK_VARIABLE;
1240                                         softc->quirks &= ~SA_QUIRK_FIXED;
1241                                 }
1242                         }
1243                         break;
1244                 case MTSETDNSTY:        /* Set density for device and mode */
1245                         PENDING_MOUNT_CHECK(softc, periph, dev);
1246
1247                         if (count > UCHAR_MAX) {
1248                                 error = EINVAL;
1249                                 break;
1250                         } else {
1251                                 error = sasetparams(periph, SA_PARAM_DENSITY,
1252                                                     0, count, 0, 0);
1253                         }
1254                         break;
1255                 case MTCOMP:    /* enable compression */
1256                         PENDING_MOUNT_CHECK(softc, periph, dev);
1257                         /*
1258                          * Some devices don't support compression, and
1259                          * don't like it if you ask them for the
1260                          * compression page.
1261                          */
1262                         if ((softc->quirks & SA_QUIRK_NOCOMP) ||
1263                             (softc->flags & SA_FLAG_COMP_UNSUPP)) {
1264                                 error = ENODEV;
1265                                 break;
1266                         }
1267                         error = sasetparams(periph, SA_PARAM_COMPRESSION,
1268                             0, 0, count, SF_NO_PRINT);
1269                         break;
1270                 default:
1271                         error = EINVAL;
1272                 }
1273                 break;
1274         }
1275         case MTIOCIEOT:
1276         case MTIOCEEOT:
1277                 error = 0;
1278                 break;
1279         case MTIOCRDSPOS:
1280                 PENDING_MOUNT_CHECK(softc, periph, dev);
1281                 error = sardpos(periph, 0, (u_int32_t *) addr);
1282                 break;
1283         case MTIOCRDHPOS:
1284                 PENDING_MOUNT_CHECK(softc, periph, dev);
1285                 error = sardpos(periph, 1, (u_int32_t *) addr);
1286                 break;
1287         case MTIOCSLOCATE:
1288                 PENDING_MOUNT_CHECK(softc, periph, dev);
1289                 error = sasetpos(periph, 0, (u_int32_t *) addr);
1290                 break;
1291         case MTIOCHLOCATE:
1292                 PENDING_MOUNT_CHECK(softc, periph, dev);
1293                 error = sasetpos(periph, 1, (u_int32_t *) addr);
1294                 break;
1295         case MTIOCGETEOTMODEL:
1296                 error = 0;
1297                 if (softc->quirks & SA_QUIRK_1FM)
1298                         mode = 1;
1299                 else
1300                         mode = 2;
1301                 *((u_int32_t *) addr) = mode;
1302                 break;
1303         case MTIOCSETEOTMODEL:
1304                 error = 0;
1305                 switch (*((u_int32_t *) addr)) {
1306                 case 1:
1307                         softc->quirks &= ~SA_QUIRK_2FM;
1308                         softc->quirks |= SA_QUIRK_1FM;
1309                         break;
1310                 case 2:
1311                         softc->quirks &= ~SA_QUIRK_1FM;
1312                         softc->quirks |= SA_QUIRK_2FM;
1313                         break;
1314                 default:
1315                         error = EINVAL;
1316                         break;
1317                 }
1318                 break;
1319         default:
1320                 error = cam_periph_ioctl(periph, ap->a_cmd, addr, saerror);
1321                 break;
1322         }
1323
1324         /*
1325          * Check to see if we cleared a frozen state
1326          */
1327         if (error == 0 && (softc->flags & SA_FLAG_TAPE_FROZEN)) {
1328                 switch(ap->a_cmd) {
1329                 case MTIOCRDSPOS:
1330                 case MTIOCRDHPOS:
1331                 case MTIOCSLOCATE:
1332                 case MTIOCHLOCATE:
1333                         softc->fileno = (daddr_t) -1;
1334                         softc->blkno = (daddr_t) -1;
1335                         softc->flags &= ~SA_FLAG_TAPE_FROZEN;
1336                         xpt_print(periph->path,
1337                             "tape state now unfrozen.\n");
1338                         break;
1339                 default:
1340                         break;
1341                 }
1342         }
1343         if (didlockperiph) {
1344                 cam_periph_unhold(periph);
1345         }
1346         cam_periph_unlock(periph);
1347         return (error);
1348 }
1349
1350 static void
1351 sainit(void)
1352 {
1353         cam_status status;
1354
1355         /*
1356          * Create our extend array for storing the devices we attach to.
1357          */
1358         saperiphs = cam_extend_new();
1359         if (saperiphs == NULL) {
1360                 kprintf("sa: Failed to alloc extend array!\n");
1361                 return;
1362         }
1363
1364         /*
1365          * Install a global async callback.
1366          */
1367         status = xpt_register_async(AC_FOUND_DEVICE, saasync, NULL, NULL);
1368
1369         if (status != CAM_REQ_CMP) {
1370                 kprintf("sa: Failed to attach master async callback "
1371                        "due to status 0x%x!\n", status);
1372         }
1373 }
1374
1375 static void
1376 saoninvalidate(struct cam_periph *periph)
1377 {
1378         struct sa_softc *softc;
1379         struct buf *q_bp;
1380         struct bio *q_bio;
1381
1382         softc = (struct sa_softc *)periph->softc;
1383
1384         /*
1385          * De-register any async callbacks.
1386          */
1387         xpt_register_async(0, saasync, periph, periph->path);
1388
1389         softc->flags |= SA_FLAG_INVALID;
1390
1391         /*
1392          * Return all queued I/O with ENXIO.
1393          * XXX Handle any transactions queued to the card
1394          *     with XPT_ABORT_CCB.
1395          */
1396         while ((q_bio = bioq_first(&softc->bio_queue)) != NULL){
1397                 bioq_remove(&softc->bio_queue, q_bio);
1398                 q_bp = q_bio->bio_buf;
1399                 q_bp->b_resid = q_bp->b_bcount;
1400                 q_bp->b_error = ENXIO;
1401                 q_bp->b_flags |= B_ERROR;
1402                 biodone(q_bio);
1403         }
1404         softc->queue_count = 0;
1405
1406         xpt_print(periph->path, "lost device\n");
1407
1408 }
1409
1410 static void
1411 sacleanup(struct cam_periph *periph)
1412 {
1413         struct sa_softc *softc;
1414
1415         softc = (struct sa_softc *)periph->softc;
1416
1417         devstat_remove_entry(&softc->device_stats);
1418
1419         cam_extend_release(saperiphs, periph->unit_number);
1420         xpt_print(periph->path, "removing device entry\n");
1421         dev_ops_remove(&sa_ops, SA_UNITMASK, SA_UNIT(periph->unit_number));
1422         kfree(softc, M_SCSISA);
1423 }
1424
1425 static void
1426 saasync(void *callback_arg, u_int32_t code,
1427         struct cam_path *path, void *arg)
1428 {
1429         struct cam_periph *periph;
1430
1431         periph = (struct cam_periph *)callback_arg;
1432         switch (code) {
1433         case AC_FOUND_DEVICE:
1434         {
1435                 struct ccb_getdev *cgd;
1436                 cam_status status;
1437
1438                 cgd = (struct ccb_getdev *)arg;
1439                 if (cgd == NULL)
1440                         break;
1441
1442                 if (SID_TYPE(&cgd->inq_data) != T_SEQUENTIAL)
1443                         break;
1444
1445                 /*
1446                  * Allocate a peripheral instance for
1447                  * this device and start the probe
1448                  * process.
1449                  */
1450                 status = cam_periph_alloc(saregister, saoninvalidate,
1451                                           sacleanup, sastart,
1452                                           "sa", CAM_PERIPH_BIO, cgd->ccb_h.path,
1453                                           saasync, AC_FOUND_DEVICE, cgd);
1454
1455                 if (status != CAM_REQ_CMP
1456                  && status != CAM_REQ_INPROG)
1457                         kprintf("saasync: Unable to probe new device "
1458                                 "due to status 0x%x\n", status);
1459                 break;
1460         }
1461         default:
1462                 cam_periph_async(periph, code, path, arg);
1463                 break;
1464         }
1465 }
1466
1467 static cam_status
1468 saregister(struct cam_periph *periph, void *arg)
1469 {
1470         struct sa_softc *softc;
1471         struct ccb_getdev *cgd;
1472         caddr_t match;
1473         int i;
1474
1475         cgd = (struct ccb_getdev *)arg;
1476         if (periph == NULL) {
1477                 kprintf("saregister: periph was NULL!!\n");
1478                 return (CAM_REQ_CMP_ERR);
1479         }
1480
1481         if (cgd == NULL) {
1482                 kprintf("saregister: no getdev CCB, can't register device\n");
1483                 return (CAM_REQ_CMP_ERR);
1484         }
1485
1486         softc = kmalloc(sizeof (*softc), M_SCSISA, M_INTWAIT | M_ZERO);
1487         softc->scsi_rev = SID_ANSI_REV(&cgd->inq_data);
1488         softc->state = SA_STATE_NORMAL;
1489         softc->fileno = (daddr_t) -1;
1490         softc->blkno = (daddr_t) -1;
1491
1492         bioq_init(&softc->bio_queue);
1493         periph->softc = softc;
1494         cam_extend_set(saperiphs, periph->unit_number, periph);
1495
1496         /*
1497          * See if this device has any quirks.
1498          */
1499         match = cam_quirkmatch((caddr_t)&cgd->inq_data,
1500                                (caddr_t)sa_quirk_table,
1501                                sizeof(sa_quirk_table)/sizeof(*sa_quirk_table),
1502                                sizeof(*sa_quirk_table), scsi_inquiry_match);
1503
1504         if (match != NULL) {
1505                 softc->quirks = ((struct sa_quirk_entry *)match)->quirks;
1506                 softc->last_media_blksize =
1507                     ((struct sa_quirk_entry *)match)->prefblk;
1508 #ifdef  CAMDEBUG
1509                 xpt_print(periph->path, "found quirk entry %d\n",
1510                     (int) (((struct sa_quirk_entry *) match) - sa_quirk_table));
1511 #endif
1512         } else
1513                 softc->quirks = SA_QUIRK_NONE;
1514
1515         /*
1516          * The SA driver supports a blocksize, but we don't know the
1517          * blocksize until we media is inserted.  So, set a flag to
1518          * indicate that the blocksize is unavailable right now.
1519          */
1520         cam_periph_unlock(periph);
1521         devstat_add_entry(&softc->device_stats, "sa", periph->unit_number, 0,
1522             DEVSTAT_BS_UNAVAILABLE, SID_TYPE(&cgd->inq_data) |
1523             DEVSTAT_TYPE_IF_SCSI, DEVSTAT_PRIORITY_TAPE);
1524
1525         dev_ops_add(&sa_ops, SA_UNITMASK, SA_UNIT(periph->unit_number));
1526         make_dev(&sa_ops, SAMINOR(SA_CTLDEV,
1527             periph->unit_number, 0, SA_ATYPE_R), UID_ROOT, GID_OPERATOR,
1528             0660, "%s%d.ctl", periph->periph_name, periph->unit_number);
1529
1530         make_dev(&sa_ops, SAMINOR(SA_NOT_CTLDEV,
1531             periph->unit_number, 0, SA_ATYPE_R), UID_ROOT, GID_OPERATOR,
1532             0660, "%s%d", periph->periph_name, periph->unit_number);
1533
1534         make_dev(&sa_ops, SAMINOR(SA_NOT_CTLDEV,
1535             periph->unit_number, 0, SA_ATYPE_NR), UID_ROOT, GID_OPERATOR,
1536             0660, "n%s%d", periph->periph_name, periph->unit_number);
1537
1538         make_dev(&sa_ops, SAMINOR(SA_NOT_CTLDEV,
1539             periph->unit_number, 0, SA_ATYPE_ER), UID_ROOT, GID_OPERATOR,
1540             0660, "e%s%d", periph->periph_name, periph->unit_number);
1541
1542         for (i = 0; i < SA_NUM_MODES; i++) {
1543
1544                 make_dev(&sa_ops,
1545                     SAMINOR(SA_NOT_CTLDEV, periph->unit_number, i, SA_ATYPE_R),
1546                     UID_ROOT, GID_OPERATOR, 0660, "%s%d.%d",
1547                     periph->periph_name, periph->unit_number, i);
1548
1549                 make_dev(&sa_ops,
1550                     SAMINOR(SA_NOT_CTLDEV, periph->unit_number, i, SA_ATYPE_NR),
1551                     UID_ROOT, GID_OPERATOR, 0660, "n%s%d.%d",
1552                     periph->periph_name, periph->unit_number, i);
1553
1554
1555                 make_dev(&sa_ops,
1556                     SAMINOR(SA_NOT_CTLDEV, periph->unit_number, i, SA_ATYPE_ER),
1557                     UID_ROOT, GID_OPERATOR, 0660, "e%s%d.%d",
1558                     periph->periph_name, periph->unit_number, i);
1559         }
1560         cam_periph_lock(periph);
1561
1562         /*
1563          * Add an async callback so that we get
1564          * notified if this device goes away.
1565          */
1566         xpt_register_async(AC_LOST_DEVICE, saasync, periph, periph->path);
1567
1568         xpt_announce_periph(periph, NULL);
1569
1570         return (CAM_REQ_CMP);
1571 }
1572
1573 static void
1574 sastart(struct cam_periph *periph, union ccb *start_ccb)
1575 {
1576         struct sa_softc *softc;
1577
1578         softc = (struct sa_softc *)periph->softc;
1579
1580         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("sastart\n"));
1581
1582
1583         switch (softc->state) {
1584         case SA_STATE_NORMAL:
1585         {
1586                 /* Pull a buffer from the queue and get going on it */
1587                 struct buf *bp;
1588                 struct bio *bio;
1589
1590                 /*
1591                  * See if there is a buf with work for us to do..
1592                  */
1593                 bio = bioq_first(&softc->bio_queue);
1594                 if (periph->immediate_priority <= periph->pinfo.priority) {
1595                         CAM_DEBUG_PRINT(CAM_DEBUG_SUBTRACE,
1596                                         ("queuing for immediate ccb\n"));
1597                         Set_CCB_Type(start_ccb, SA_CCB_WAITING);
1598                         SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
1599                                           periph_links.sle);
1600                         periph->immediate_priority = CAM_PRIORITY_NONE;
1601                         wakeup(&periph->ccb_list);
1602                 } else if (bio == NULL) {
1603                         xpt_release_ccb(start_ccb);
1604                 } else if ((softc->flags & SA_FLAG_ERR_PENDING) != 0) {
1605                         struct bio *done_bio;
1606 again:
1607                         softc->queue_count--;
1608                         bioq_remove(&softc->bio_queue, bio);
1609                         bp = bio->bio_buf;
1610                         bp->b_resid = bp->b_bcount;
1611                         done_bio = bio;
1612                         if ((softc->flags & SA_FLAG_EOM_PENDING) != 0) {
1613                                 /*
1614                                  * We now just clear errors in this case
1615                                  * and let the residual be the notifier.
1616                                  */
1617                                 bp->b_error = 0;
1618                         } else if ((softc->flags & SA_FLAG_EOF_PENDING) != 0) {
1619                                 /*
1620                                  * This can only happen if we're reading
1621                                  * in fixed length mode. In this case,
1622                                  * we dump the rest of the list the
1623                                  * same way.
1624                                  */
1625                                 bp->b_error = 0;
1626                                 if (bioq_first(&softc->bio_queue) != NULL) {
1627                                         biodone(done_bio);
1628                                         goto again;
1629                                 }
1630                         } else if ((softc->flags & SA_FLAG_EIO_PENDING) != 0) {
1631                                 bp->b_error = EIO;
1632                                 bp->b_flags |= B_ERROR;
1633                         }
1634                         bio = bioq_first(&softc->bio_queue);
1635                         /*
1636                          * Only if we have no other buffers queued up
1637                          * do we clear the pending error flag.
1638                          */
1639                         if (bio == NULL)
1640                                 softc->flags &= ~SA_FLAG_ERR_PENDING;
1641                         CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
1642                             ("sastart- ERR_PENDING now 0x%x, bio is %sNULL, "
1643                             "%d more buffers queued up\n",
1644                             (softc->flags & SA_FLAG_ERR_PENDING),
1645                             (bio != NULL)? "not " : " ", softc->queue_count));
1646                         xpt_release_ccb(start_ccb);
1647                         biodone(done_bio);
1648                 } else {
1649                         u_int32_t length;
1650
1651                         bioq_remove(&softc->bio_queue, bio);
1652                         bp = bio->bio_buf;
1653                         softc->queue_count--;
1654
1655                         if ((softc->flags & SA_FLAG_FIXED) != 0) {
1656                                 if (softc->blk_shift != 0) {
1657                                         length =
1658                                             bp->b_bcount >> softc->blk_shift;
1659                                 } else if (softc->media_blksize != 0) {
1660                                         length =
1661                                             bp->b_bcount / softc->media_blksize;
1662                                 } else {
1663                                         bp->b_error = EIO;
1664                                         xpt_print(periph->path, "zero blocksize"
1665                                             " for FIXED length writes?\n");
1666                                         biodone(bio);
1667                                         break;
1668                                 }
1669 #if     0
1670                                 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_INFO,
1671                                     ("issuing a %d fixed record %s\n",
1672                                     length,  (bp->bio_cmd == BIO_READ)? "read" :
1673                                     "write"));
1674 #endif
1675                         } else {
1676                                 length = bp->b_bcount;
1677 #if     0
1678                                 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_INFO,
1679                                     ("issuing a %d variable byte %s\n",
1680                                     length,  (bp->bio_cmd == BIO_READ)? "read" :
1681                                     "write"));
1682 #endif
1683                         }
1684                         devstat_start_transaction(&softc->device_stats);
1685                         /*
1686                          * Some people have theorized that we should
1687                          * suppress illegal length indication if we are
1688                          * running in variable block mode so that we don't
1689                          * have to request sense every time our requested
1690                          * block size is larger than the written block.
1691                          * The residual information from the ccb allows
1692                          * us to identify this situation anyway.  The only
1693                          * problem with this is that we will not get
1694                          * information about blocks that are larger than
1695                          * our read buffer unless we set the block size
1696                          * in the mode page to something other than 0.
1697                          *
1698                          * I believe that this is a non-issue. If user apps
1699                          * don't adjust their read size to match our record
1700                          * size, that's just life. Anyway, the typical usage
1701                          * would be to issue, e.g., 64KB reads and occasionally
1702                          * have to do deal with 512 byte or 1KB intermediate
1703                          * records.
1704                          */
1705                         softc->dsreg = (bp->b_cmd == BUF_CMD_READ) ?
1706                             MTIO_DSREG_RD : MTIO_DSREG_WR;
1707                         scsi_sa_read_write(&start_ccb->csio, 0, sadone,
1708                             MSG_SIMPLE_Q_TAG, (bp->b_cmd == BUF_CMD_READ) != 0,
1709                             FALSE, (softc->flags & SA_FLAG_FIXED) != 0,
1710                             length, bp->b_data, bp->b_bcount, SSD_FULL_SIZE,
1711                             IO_TIMEOUT);
1712                         start_ccb->ccb_h.ccb_pflags &= ~SA_POSITION_UPDATED;
1713                         Set_CCB_Type(start_ccb, SA_CCB_BUFFER_IO);
1714                         start_ccb->ccb_h.ccb_bio = bio;
1715                         bio = bioq_first(&softc->bio_queue);
1716                         xpt_action(start_ccb);
1717                 }
1718
1719                 if (bio != NULL) {
1720                         /* Have more work to do, so ensure we stay scheduled */
1721                         xpt_schedule(periph, 1);
1722                 }
1723                 break;
1724         }
1725         case SA_STATE_ABNORMAL:
1726         default:
1727                 panic("state 0x%x in sastart", softc->state);
1728                 break;
1729         }
1730 }
1731
1732
1733 static void
1734 sadone(struct cam_periph *periph, union ccb *done_ccb)
1735 {
1736         struct sa_softc *softc;
1737         struct ccb_scsiio *csio;
1738
1739         softc = (struct sa_softc *)periph->softc;
1740         csio = &done_ccb->csio;
1741         switch (CCB_Type(csio)) {
1742         case SA_CCB_BUFFER_IO:
1743         {
1744                 struct buf *bp;
1745                 struct bio *bio;
1746                 int error;
1747
1748                 softc->dsreg = MTIO_DSREG_REST;
1749                 bio = (struct bio *)done_ccb->ccb_h.ccb_bio;
1750                 bp = bio->bio_buf;
1751                 error = 0;
1752                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
1753                         if ((error = saerror(done_ccb, 0, 0)) == ERESTART) {
1754                                 /*
1755                                  * A retry was scheduled, so just return.
1756                                  */
1757                                 return;
1758                         }
1759                 }
1760
1761                 if (error == EIO) {
1762                         struct buf *q_bp;
1763                         struct bio *q_bio;
1764
1765                         /*
1766                          * Catastrophic error. Mark the tape as frozen
1767                          * (we no longer know tape position).
1768                          *
1769                          * Return all queued I/O with EIO, and unfreeze
1770                          * our queue so that future transactions that
1771                          * attempt to fix this problem can get to the
1772                          * device.
1773                          *
1774                          */
1775
1776                         softc->flags |= SA_FLAG_TAPE_FROZEN;
1777                         while ((q_bio = bioq_first(&softc->bio_queue)) != NULL) {
1778                                 bioq_remove(&softc->bio_queue, q_bio);
1779                                 q_bp = q_bio->bio_buf;
1780                                 q_bp->b_resid = q_bp->b_bcount;
1781                                 q_bp->b_error = EIO;
1782                                 q_bp->b_flags |= B_ERROR;
1783                                 biodone(q_bio);
1784                         }
1785                 }
1786                 if (error != 0) {
1787                         bp->b_resid = bp->b_bcount;
1788                         bp->b_error = error;
1789                         bp->b_flags |= B_ERROR;
1790                         /*
1791                          * In the error case, position is updated in saerror.
1792                          */
1793                 } else {
1794                         bp->b_resid = csio->resid;
1795                         bp->b_error = 0;
1796                         if (csio->resid != 0) {
1797                                 bp->b_flags |= B_ERROR;
1798                         }
1799                         if (bp->b_cmd != BUF_CMD_READ) {
1800                                 softc->flags |= SA_FLAG_TAPE_WRITTEN;
1801                                 softc->filemarks = 0;
1802                         }
1803                         if (!(csio->ccb_h.ccb_pflags & SA_POSITION_UPDATED) &&
1804                             (softc->blkno != (daddr_t) -1)) {
1805                                 if ((softc->flags & SA_FLAG_FIXED) != 0) {
1806                                         u_int32_t l;
1807                                         if (softc->blk_shift != 0) {
1808                                                 l = bp->b_bcount >>
1809                                                         softc->blk_shift;
1810                                         } else {
1811                                                 l = bp->b_bcount /
1812                                                         softc->media_blksize;
1813                                         }
1814                                         softc->blkno += (daddr_t) l;
1815                                 } else {
1816                                         softc->blkno++;
1817                                 }
1818                         }
1819                 }
1820                 /*
1821                  * If we had an error (immediate or pending),
1822                  * release the device queue now.
1823                  */
1824                 if (error || (softc->flags & SA_FLAG_ERR_PENDING))
1825                         cam_release_devq(done_ccb->ccb_h.path, 0, 0, 0, 0);
1826 #ifdef  CAMDEBUG
1827                 if (error || bp->b_resid) {
1828                         CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
1829                                   ("error %d resid %d count %d\n", error,
1830                                   bp->b_resid, bp->b_bcount));
1831                 }
1832 #endif
1833                 devstat_end_transaction_buf(&softc->device_stats, bp);
1834                 biodone(bio);
1835                 break;
1836         }
1837         case SA_CCB_WAITING:
1838         {
1839                 /* Caller will release the CCB */
1840                 wakeup(&done_ccb->ccb_h.cbfcnp);
1841                 return;
1842         }
1843         }
1844         xpt_release_ccb(done_ccb);
1845 }
1846
1847 /*
1848  * Mount the tape (make sure it's ready for I/O).
1849  */
1850 static int
1851 samount(struct cam_periph *periph, int oflags, cdev_t dev)
1852 {
1853         struct  sa_softc *softc;
1854         union   ccb *ccb;
1855         int     error;
1856
1857         /*
1858          * oflags can be checked for 'kind' of open (read-only check) - later
1859          * dev can be checked for a control-mode or compression open - later
1860          */
1861         UNUSED_PARAMETER(oflags);
1862         UNUSED_PARAMETER(dev);
1863
1864
1865         softc = (struct sa_softc *)periph->softc;
1866
1867         /*
1868          * This should determine if something has happend since the last
1869          * open/mount that would invalidate the mount. We do *not* want
1870          * to retry this command- we just want the status. But we only
1871          * do this if we're mounted already- if we're not mounted,
1872          * we don't care about the unit read state and can instead use
1873          * this opportunity to attempt to reserve the tape unit.
1874          */
1875
1876         if (softc->flags & SA_FLAG_TAPE_MOUNTED) {
1877                 ccb = cam_periph_getccb(periph, 1);
1878                 scsi_test_unit_ready(&ccb->csio, 0, sadone,
1879                     MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT);
1880                 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1881                     &softc->device_stats);
1882                 QFRLS(ccb);
1883                 if (error == ENXIO) {
1884                         softc->flags &= ~SA_FLAG_TAPE_MOUNTED;
1885                         scsi_test_unit_ready(&ccb->csio, 0, sadone,
1886                             MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT);
1887                         error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1888                             &softc->device_stats);
1889                         QFRLS(ccb);
1890                 } else if (error) {
1891                         /*
1892                          * We don't need to freeze the tape because we
1893                          * will now attempt to rewind/load it.
1894                          */
1895                         softc->flags &= ~SA_FLAG_TAPE_MOUNTED;
1896                         if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
1897                                 xpt_print(periph->path,
1898                                     "error %d on TUR in samount\n", error);
1899                         }
1900                 }
1901         } else {
1902                 error = sareservereleaseunit(periph, TRUE);
1903                 if (error) {
1904                         return (error);
1905                 }
1906                 ccb = cam_periph_getccb(periph, 1);
1907                 scsi_test_unit_ready(&ccb->csio, 0, sadone,
1908                     MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT);
1909                 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1910                     &softc->device_stats);
1911                 QFRLS(ccb);
1912         }
1913
1914         if ((softc->flags & SA_FLAG_TAPE_MOUNTED) == 0) {
1915                 struct scsi_read_block_limits_data *rblim = NULL;
1916                 int comp_enabled, comp_supported;
1917                 u_int8_t write_protect, guessing = 0;
1918
1919                 /*
1920                  * Clear out old state.
1921                  */
1922                 softc->flags &= ~(SA_FLAG_TAPE_WP|SA_FLAG_TAPE_WRITTEN|
1923                                   SA_FLAG_ERR_PENDING|SA_FLAG_COMP_ENABLED|
1924                                   SA_FLAG_COMP_SUPP|SA_FLAG_COMP_UNSUPP);
1925                 softc->filemarks = 0;
1926
1927                 /*
1928                  * *Very* first off, make sure we're loaded to BOT.
1929                  */
1930                 scsi_load_unload(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, FALSE,
1931                     FALSE, FALSE, 1, SSD_FULL_SIZE, REWIND_TIMEOUT);
1932                 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1933                     &softc->device_stats);
1934                 QFRLS(ccb);
1935
1936                 /*
1937                  * In case this doesn't work, do a REWIND instead
1938                  */
1939                 if (error) {
1940                         scsi_rewind(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG,
1941                             FALSE, SSD_FULL_SIZE, REWIND_TIMEOUT);
1942                         error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1943                                 &softc->device_stats);
1944                         QFRLS(ccb);
1945                 }
1946                 if (error) {
1947                         xpt_release_ccb(ccb);
1948                         goto exit;
1949                 }
1950
1951                 /*
1952                  * Do a dummy test read to force access to the
1953                  * media so that the drive will really know what's
1954                  * there. We actually don't really care what the
1955                  * blocksize on tape is and don't expect to really
1956                  * read a full record.
1957                  */
1958                 rblim = kmalloc(8192, M_SCSISA, M_INTWAIT);
1959
1960                 if ((softc->quirks & SA_QUIRK_NODREAD) == 0) {
1961                         scsi_sa_read_write(&ccb->csio, 0, sadone,
1962                             MSG_SIMPLE_Q_TAG, 1, FALSE, 0, 8192,
1963                             (void *) rblim, 8192, SSD_FULL_SIZE,
1964                             IO_TIMEOUT);
1965                         cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1966                             &softc->device_stats);
1967                         QFRLS(ccb);
1968                         scsi_rewind(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG,
1969                             FALSE, SSD_FULL_SIZE, REWIND_TIMEOUT);
1970                         error = cam_periph_runccb(ccb, saerror, CAM_RETRY_SELTO,
1971                             SF_NO_PRINT | SF_RETRY_UA,
1972                             &softc->device_stats);
1973                         QFRLS(ccb);
1974                         if (error) {
1975                                 xpt_print(periph->path,
1976                                     "unable to rewind after test read\n");
1977                                 xpt_release_ccb(ccb);
1978                                 goto exit;
1979                         }
1980                 }
1981
1982                 /*
1983                  * Next off, determine block limits.
1984                  */
1985                 scsi_read_block_limits(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG,
1986                     rblim, SSD_FULL_SIZE, SCSIOP_TIMEOUT);
1987
1988                 error = cam_periph_runccb(ccb, saerror, CAM_RETRY_SELTO,
1989                     SF_NO_PRINT | SF_RETRY_UA, &softc->device_stats);
1990
1991                 QFRLS(ccb);
1992                 xpt_release_ccb(ccb);
1993
1994                 if (error != 0) {
1995                         /*
1996                          * If it's less than SCSI-2, READ BLOCK LIMITS is not
1997                          * a MANDATORY command. Anyway- it doesn't matter-
1998                          * we can proceed anyway.
1999                          */
2000                         softc->blk_gran = 0;
2001                         softc->max_blk = ~0;
2002                         softc->min_blk = 0;
2003                 } else {
2004                         if (softc->scsi_rev >= SCSI_REV_SPC) {
2005                                 softc->blk_gran = RBL_GRAN(rblim);
2006                         } else {
2007                                 softc->blk_gran = 0;
2008                         }
2009                         /*
2010                          * We take max_blk == min_blk to mean a default to
2011                          * fixed mode- but note that whatever we get out of
2012                          * sagetparams below will actually determine whether
2013                          * we are actually *in* fixed mode.
2014                          */
2015                         softc->max_blk = scsi_3btoul(rblim->maximum);
2016                         softc->min_blk = scsi_2btoul(rblim->minimum);
2017
2018
2019                 }
2020                 /*
2021                  * Next, perform a mode sense to determine
2022                  * current density, blocksize, compression etc.
2023                  */
2024                 error = sagetparams(periph, SA_PARAM_ALL,
2025                                     &softc->media_blksize,
2026                                     &softc->media_density,
2027                                     &softc->media_numblks,
2028                                     &softc->buffer_mode, &write_protect,
2029                                     &softc->speed, &comp_supported,
2030                                     &comp_enabled, &softc->comp_algorithm,
2031                                     NULL);
2032
2033                 if (error != 0) {
2034                         /*
2035                          * We could work a little harder here. We could
2036                          * adjust our attempts to get information. It
2037                          * might be an ancient tape drive. If someone
2038                          * nudges us, we'll do that.
2039                          */
2040                         goto exit;
2041                 }
2042
2043                 /*
2044                  * If no quirk has determined that this is a device that is
2045                  * preferred to be in fixed or variable mode, now is the time
2046                  * to find out.
2047                  */
2048                 if ((softc->quirks & (SA_QUIRK_FIXED|SA_QUIRK_VARIABLE)) == 0) {
2049                         guessing = 1;
2050                         /*
2051                          * This could be expensive to find out. Luckily we
2052                          * only need to do this once. If we start out in
2053                          * 'default' mode, try and set ourselves to one
2054                          * of the densities that would determine a wad
2055                          * of other stuff. Go from highest to lowest.
2056                          */
2057                         if (softc->media_density == SCSI_DEFAULT_DENSITY) {
2058                                 int i;
2059                                 static u_int8_t ctry[] = {
2060                                         SCSI_DENSITY_HALFINCH_PE,
2061                                         SCSI_DENSITY_HALFINCH_6250C,
2062                                         SCSI_DENSITY_HALFINCH_6250,
2063                                         SCSI_DENSITY_HALFINCH_1600,
2064                                         SCSI_DENSITY_HALFINCH_800,
2065                                         SCSI_DENSITY_QIC_4GB,
2066                                         SCSI_DENSITY_QIC_2GB,
2067                                         SCSI_DENSITY_QIC_525_320,
2068                                         SCSI_DENSITY_QIC_150,
2069                                         SCSI_DENSITY_QIC_120,
2070                                         SCSI_DENSITY_QIC_24,
2071                                         SCSI_DENSITY_QIC_11_9TRK,
2072                                         SCSI_DENSITY_QIC_11_4TRK,
2073                                         SCSI_DENSITY_QIC_1320,
2074                                         SCSI_DENSITY_QIC_3080,
2075                                         0
2076                                 };
2077                                 for (i = 0; ctry[i]; i++) {
2078                                         error = sasetparams(periph,
2079                                             SA_PARAM_DENSITY, 0, ctry[i],
2080                                             0, SF_NO_PRINT);
2081                                         if (error == 0) {
2082                                                 softc->media_density = ctry[i];
2083                                                 break;
2084                                         }
2085                                 }
2086                         }
2087                         switch (softc->media_density) {
2088                         case SCSI_DENSITY_QIC_11_4TRK:
2089                         case SCSI_DENSITY_QIC_11_9TRK:
2090                         case SCSI_DENSITY_QIC_24:
2091                         case SCSI_DENSITY_QIC_120:
2092                         case SCSI_DENSITY_QIC_150:
2093                         case SCSI_DENSITY_QIC_525_320:
2094                         case SCSI_DENSITY_QIC_1320:
2095                         case SCSI_DENSITY_QIC_3080:
2096                                 softc->quirks &= ~SA_QUIRK_2FM;
2097                                 softc->quirks |= SA_QUIRK_FIXED|SA_QUIRK_1FM;
2098                                 softc->last_media_blksize = 512;
2099                                 break;
2100                         case SCSI_DENSITY_QIC_4GB:
2101                         case SCSI_DENSITY_QIC_2GB:
2102                                 softc->quirks &= ~SA_QUIRK_2FM;
2103                                 softc->quirks |= SA_QUIRK_FIXED|SA_QUIRK_1FM;
2104                                 softc->last_media_blksize = 1024;
2105                                 break;
2106                         default:
2107                                 softc->last_media_blksize =
2108                                     softc->media_blksize;
2109                                 softc->quirks |= SA_QUIRK_VARIABLE;
2110                                 break;
2111                         }
2112                 }
2113
2114                 /*
2115                  * If no quirk has determined that this is a device that needs
2116                  * to have 2 Filemarks at EOD, now is the time to find out.
2117                  */
2118
2119                 if ((softc->quirks & SA_QUIRK_2FM) == 0) {
2120                         switch (softc->media_density) {
2121                         case SCSI_DENSITY_HALFINCH_800:
2122                         case SCSI_DENSITY_HALFINCH_1600:
2123                         case SCSI_DENSITY_HALFINCH_6250:
2124                         case SCSI_DENSITY_HALFINCH_6250C:
2125                         case SCSI_DENSITY_HALFINCH_PE:
2126                                 softc->quirks &= ~SA_QUIRK_1FM;
2127                                 softc->quirks |= SA_QUIRK_2FM;
2128                                 break;
2129                         default:
2130                                 break;
2131                         }
2132                 }
2133
2134                 /*
2135                  * Now validate that some info we got makes sense.
2136                  */
2137                 if ((softc->max_blk < softc->media_blksize) ||
2138                     (softc->min_blk > softc->media_blksize &&
2139                     softc->media_blksize)) {
2140                         xpt_print(periph->path,
2141                             "BLOCK LIMITS (%d..%d) could not match current "
2142                             "block settings (%d)- adjusting\n", softc->min_blk,
2143                             softc->max_blk, softc->media_blksize);
2144                         softc->max_blk = softc->min_blk =
2145                             softc->media_blksize;
2146                 }
2147
2148                 /*
2149                  * Now put ourselves into the right frame of mind based
2150                  * upon quirks...
2151                  */
2152 tryagain:
2153                 /*
2154                  * If we want to be in FIXED mode and our current blocksize
2155                  * is not equal to our last blocksize (if nonzero), try and
2156                  * set ourselves to this last blocksize (as the 'preferred'
2157                  * block size).  The initial quirkmatch at registry sets the
2158                  * initial 'last' blocksize. If, for whatever reason, this
2159                  * 'last' blocksize is zero, set the blocksize to 512,
2160                  * or min_blk if that's larger.
2161                  */
2162                 if ((softc->quirks & SA_QUIRK_FIXED) &&
2163                     (softc->quirks & SA_QUIRK_NO_MODESEL) == 0 &&
2164                     (softc->media_blksize != softc->last_media_blksize)) {
2165                         softc->media_blksize = softc->last_media_blksize;
2166                         if (softc->media_blksize == 0) {
2167                                 softc->media_blksize = 512;
2168                                 if (softc->media_blksize < softc->min_blk) {
2169                                         softc->media_blksize = softc->min_blk;
2170                                 }
2171                         }
2172                         error = sasetparams(periph, SA_PARAM_BLOCKSIZE,
2173                             softc->media_blksize, 0, 0, SF_NO_PRINT);
2174                         if (error) {
2175                                 xpt_print(periph->path,
2176                                     "unable to set fixed blocksize to %d\n",
2177                                     softc->media_blksize);
2178                                 goto exit;
2179                         }
2180                 }
2181
2182                 if ((softc->quirks & SA_QUIRK_VARIABLE) &&
2183                     (softc->media_blksize != 0)) {
2184                         softc->last_media_blksize = softc->media_blksize;
2185                         softc->media_blksize = 0;
2186                         error = sasetparams(periph, SA_PARAM_BLOCKSIZE,
2187                             0, 0, 0, SF_NO_PRINT);
2188                         if (error) {
2189                                 /*
2190                                  * If this fails and we were guessing, just
2191                                  * assume that we got it wrong and go try
2192                                  * fixed block mode. Don't even check against
2193                                  * density code at this point.
2194                                  */
2195                                 if (guessing) {
2196                                         softc->quirks &= ~SA_QUIRK_VARIABLE;
2197                                         softc->quirks |= SA_QUIRK_FIXED;
2198                                         if (softc->last_media_blksize == 0)
2199                                                 softc->last_media_blksize = 512;
2200                                         goto tryagain;
2201                                 }
2202                                 xpt_print(periph->path,
2203                                     "unable to set variable blocksize\n");
2204                                 goto exit;
2205                         }
2206                 }
2207
2208                 /*
2209                  * Now that we have the current block size,
2210                  * set up some parameters for sastart's usage.
2211                  */
2212                 if (softc->media_blksize) {
2213                         softc->flags |= SA_FLAG_FIXED;
2214                         if (powerof2(softc->media_blksize)) {
2215                                 softc->blk_shift =
2216                                     ffs(softc->media_blksize) - 1;
2217                                 softc->blk_mask = softc->media_blksize - 1;
2218                         } else {
2219                                 softc->blk_mask = ~0;
2220                                 softc->blk_shift = 0;
2221                         }
2222                 } else {
2223                         /*
2224                          * The SCSI-3 spec allows 0 to mean "unspecified".
2225                          * The SCSI-1 spec allows 0 to mean 'infinite'.
2226                          *
2227                          * Either works here.
2228                          */
2229                         if (softc->max_blk == 0) {
2230                                 softc->max_blk = ~0;
2231                         }
2232                         softc->blk_shift = 0;
2233                         if (softc->blk_gran != 0) {
2234                                 softc->blk_mask = softc->blk_gran - 1;
2235                         } else {
2236                                 softc->blk_mask = 0;
2237                         }
2238                 }
2239
2240                 if (write_protect)
2241                         softc->flags |= SA_FLAG_TAPE_WP;
2242
2243                 if (comp_supported) {
2244                         if (softc->saved_comp_algorithm == 0)
2245                                 softc->saved_comp_algorithm =
2246                                     softc->comp_algorithm;
2247                         softc->flags |= SA_FLAG_COMP_SUPP;
2248                         if (comp_enabled)
2249                                 softc->flags |= SA_FLAG_COMP_ENABLED;
2250                 } else
2251                         softc->flags |= SA_FLAG_COMP_UNSUPP;
2252
2253                 if ((softc->buffer_mode == SMH_SA_BUF_MODE_NOBUF) &&
2254                     (softc->quirks & SA_QUIRK_NO_MODESEL) == 0) {
2255                         error = sasetparams(periph, SA_PARAM_BUFF_MODE, 0,
2256                             0, 0, SF_NO_PRINT);
2257                         if (error == 0) {
2258                                 softc->buffer_mode = SMH_SA_BUF_MODE_SIBUF;
2259                         } else {
2260                                 xpt_print(periph->path,
2261                                     "unable to set buffered mode\n");
2262                         }
2263                         error = 0;      /* not an error */
2264                 }
2265
2266
2267                 if (error == 0) {
2268                         softc->flags |= SA_FLAG_TAPE_MOUNTED;
2269                 }
2270 exit:
2271                 if (rblim != NULL)
2272                         kfree(rblim, M_SCSISA);
2273
2274                 if (error != 0) {
2275                         softc->dsreg = MTIO_DSREG_NIL;
2276                 } else {
2277                         softc->fileno = softc->blkno = 0;
2278                         softc->dsreg = MTIO_DSREG_REST;
2279                 }
2280 #ifdef  SA_1FM_AT_EOD
2281                 if ((softc->quirks & SA_QUIRK_2FM) == 0)
2282                         softc->quirks |= SA_QUIRK_1FM;
2283 #else
2284                 if ((softc->quirks & SA_QUIRK_1FM) == 0)
2285                         softc->quirks |= SA_QUIRK_2FM;
2286 #endif
2287         } else
2288                 xpt_release_ccb(ccb);
2289
2290         /*
2291          * If we return an error, we're not mounted any more,
2292          * so release any device reservation.
2293          */
2294         if (error != 0) {
2295                 sareservereleaseunit(periph, FALSE);
2296         } else {
2297                 /*
2298                  * Clear I/O residual.
2299                  */
2300                 softc->last_io_resid = 0;
2301                 softc->last_ctl_resid = 0;
2302         }
2303         return (error);
2304 }
2305
2306 /*
2307  * How many filemarks do we need to write if we were to terminate the
2308  * tape session right now? Note that this can be a negative number
2309  */
2310
2311 static int
2312 samarkswanted(struct cam_periph *periph)
2313 {
2314         int     markswanted;
2315         struct  sa_softc *softc;
2316
2317         softc = (struct sa_softc *)periph->softc;
2318         markswanted = 0;
2319         if ((softc->flags & SA_FLAG_TAPE_WRITTEN) != 0) {
2320                 markswanted++;
2321                 if (softc->quirks & SA_QUIRK_2FM)
2322                         markswanted++;
2323         }
2324         markswanted -= softc->filemarks;
2325         return (markswanted);
2326 }
2327
2328 static int
2329 sacheckeod(struct cam_periph *periph)
2330 {
2331         int     error;
2332         int     markswanted;
2333
2334         markswanted = samarkswanted(periph);
2335
2336         if (markswanted > 0) {
2337                 error = sawritefilemarks(periph, markswanted, FALSE);
2338         } else {
2339                 error = 0;
2340         }
2341         return (error);
2342 }
2343
2344 static int
2345 saerror(union ccb *ccb, u_int32_t cflgs, u_int32_t sflgs)
2346 {
2347         static const char *toobig =
2348             "%d-byte tape record bigger than supplied buffer\n";
2349         struct  cam_periph *periph;
2350         struct  sa_softc *softc;
2351         struct  ccb_scsiio *csio;
2352         struct  scsi_sense_data *sense;
2353         u_int32_t resid = 0;
2354         int32_t info = 0;
2355         cam_status status;
2356         int error_code, sense_key, asc, ascq, error, aqvalid;
2357
2358         periph = xpt_path_periph(ccb->ccb_h.path);
2359         softc = (struct sa_softc *)periph->softc;
2360         csio = &ccb->csio;
2361         sense = &csio->sense_data;
2362         scsi_extract_sense(sense, &error_code, &sense_key, &asc, &ascq);
2363         aqvalid = sense->extra_len >= 6;
2364         error = 0;
2365
2366         status = csio->ccb_h.status & CAM_STATUS_MASK;
2367
2368         /*
2369          * Calculate/latch up, any residuals... We do this in a funny 2-step
2370          * so we can print stuff here if we have CAM_DEBUG enabled for this
2371          * unit.
2372          */
2373         if (status == CAM_SCSI_STATUS_ERROR) {
2374                 if ((sense->error_code & SSD_ERRCODE_VALID) != 0) {
2375                         info = (int32_t) scsi_4btoul(sense->info);
2376                         resid = info;
2377                         if ((softc->flags & SA_FLAG_FIXED) != 0)
2378                                 resid *= softc->media_blksize;
2379                 } else {
2380                         resid = csio->dxfer_len;
2381                         info = resid;
2382                         if ((softc->flags & SA_FLAG_FIXED) != 0) {
2383                                 if (softc->media_blksize)
2384                                         info /= softc->media_blksize;
2385                         }
2386                 }
2387                 if (CCB_Type(csio) == SA_CCB_BUFFER_IO) {
2388                         bcopy((caddr_t) sense, (caddr_t) &softc->last_io_sense,
2389                             sizeof (struct scsi_sense_data));
2390                         bcopy(csio->cdb_io.cdb_bytes, softc->last_io_cdb,
2391                             (int) csio->cdb_len);
2392                         softc->last_io_resid = resid;
2393                         softc->last_resid_was_io = 1;
2394                 } else {
2395                         bcopy((caddr_t) sense, (caddr_t) &softc->last_ctl_sense,
2396                             sizeof (struct scsi_sense_data));
2397                         bcopy(csio->cdb_io.cdb_bytes, softc->last_ctl_cdb,
2398                             (int) csio->cdb_len);
2399                         softc->last_ctl_resid = resid;
2400                         softc->last_resid_was_io = 0;
2401                 }
2402                 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, ("CDB[0]=0x%x Key 0x%x "
2403                     "ASC/ASCQ 0x%x/0x%x CAM STATUS 0x%x flags 0x%x resid %d "
2404                     "dxfer_len %d\n", csio->cdb_io.cdb_bytes[0] & 0xff,
2405                     sense_key, asc, ascq, status,
2406                     sense->flags & ~SSD_KEY_RESERVED, resid, csio->dxfer_len));
2407         } else {
2408                 CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
2409                     ("Cam Status 0x%x\n", status));
2410         }
2411
2412         switch (status) {
2413         case CAM_REQ_CMP:
2414                 return (0);
2415         case CAM_SCSI_STATUS_ERROR:
2416                 /*
2417                  * If a read/write command, we handle it here.
2418                  */
2419                 if (CCB_Type(csio) != SA_CCB_WAITING) {
2420                         break;
2421                 }
2422                 /*
2423                  * If this was just EOM/EOP, Filemark, Setmark or ILI detected
2424                  * on a non read/write command, we assume it's not an error
2425                  * and propagate the residule and return.
2426                  */
2427                 if ((aqvalid && asc == 0 && ascq > 0 && ascq <= 5) ||
2428                     (aqvalid == 0 && sense_key == SSD_KEY_NO_SENSE)) {
2429                         csio->resid = resid;
2430                         QFRLS(ccb);
2431                         return (0);
2432                 }
2433                 /*
2434                  * Otherwise, we let the common code handle this.
2435                  */
2436                 return (cam_periph_error(ccb, cflgs, sflgs, &softc->saved_ccb));
2437
2438         /*
2439          * XXX: To Be Fixed
2440          * We cannot depend upon CAM honoring retry counts for these.
2441          */
2442         case CAM_SCSI_BUS_RESET:
2443         case CAM_BDR_SENT:
2444                 if (ccb->ccb_h.retry_count <= 0) {
2445                         return (EIO);
2446                 }
2447                 /* FALLTHROUGH */
2448         default:
2449                 return (cam_periph_error(ccb, cflgs, sflgs, &softc->saved_ccb));
2450         }
2451
2452         /*
2453          * Handle filemark, end of tape, mismatched record sizes....
2454          * From this point out, we're only handling read/write cases.
2455          * Handle writes && reads differently.
2456          */
2457
2458         if (csio->cdb_io.cdb_bytes[0] == SA_WRITE) {
2459                 if (sense_key == SSD_KEY_VOLUME_OVERFLOW) {
2460                         csio->resid = resid;
2461                         error = ENOSPC;
2462                 } else if (sense->flags & SSD_EOM) {
2463                         softc->flags |= SA_FLAG_EOM_PENDING;
2464                         /*
2465                          * Grotesque as it seems, the few times
2466                          * I've actually seen a non-zero resid,
2467                          * the tape drive actually lied and had
2468                          * written all the data!.
2469                          */
2470                         csio->resid = 0;
2471                 }
2472         } else {
2473                 csio->resid = resid;
2474                 if (sense_key == SSD_KEY_BLANK_CHECK) {
2475                         if (softc->quirks & SA_QUIRK_1FM) {
2476                                 error = 0;
2477                                 softc->flags |= SA_FLAG_EOM_PENDING;
2478                         } else {
2479                                 error = EIO;
2480                         }
2481                 } else if (sense->flags & SSD_FILEMARK) {
2482                         if (softc->flags & SA_FLAG_FIXED) {
2483                                 error = -1;
2484                                 softc->flags |= SA_FLAG_EOF_PENDING;
2485                         }
2486                         /*
2487                          * Unconditionally, if we detected a filemark on a read,
2488                          * mark that we've run moved a file ahead.
2489                          */
2490                         if (softc->fileno != (daddr_t) -1) {
2491                                 softc->fileno++;
2492                                 softc->blkno = 0;
2493                                 csio->ccb_h.ccb_pflags |= SA_POSITION_UPDATED;
2494                         }
2495                 }
2496         }
2497
2498         /*
2499          * Incorrect Length usually applies to read, but can apply to writes.
2500          */
2501         if (error == 0 && (sense->flags & SSD_ILI)) {
2502                 if (info < 0) {
2503                         xpt_print(csio->ccb_h.path, toobig,
2504                             csio->dxfer_len - info);
2505                         csio->resid = csio->dxfer_len;
2506                         error = EIO;
2507                 } else {
2508                         csio->resid = resid;
2509                         if (softc->flags & SA_FLAG_FIXED) {
2510                                 softc->flags |= SA_FLAG_EIO_PENDING;
2511                         }
2512                         /*
2513                          * Bump the block number if we hadn't seen a filemark.
2514                          * Do this independent of errors (we've moved anyway).
2515                          */
2516                         if ((sense->flags & SSD_FILEMARK) == 0) {
2517                                 if (softc->blkno != (daddr_t) -1) {
2518                                         softc->blkno++;
2519                                         csio->ccb_h.ccb_pflags |=
2520                                            SA_POSITION_UPDATED;
2521                                 }
2522                         }
2523                 }
2524         }
2525
2526         if (error <= 0) {
2527                 /*
2528                  * Unfreeze the queue if frozen as we're not returning anything
2529                  * to our waiters that would indicate an I/O error has occurred
2530                  * (yet).
2531                  */
2532                 QFRLS(ccb);
2533                 error = 0;
2534         }
2535         return (error);
2536 }
2537
2538 static int
2539 sagetparams(struct cam_periph *periph, sa_params params_to_get,
2540             u_int32_t *blocksize, u_int8_t *density, u_int32_t *numblocks,
2541             int *buff_mode, u_int8_t *write_protect, u_int8_t *speed,
2542             int *comp_supported, int *comp_enabled, u_int32_t *comp_algorithm,
2543             sa_comp_t *tcs)
2544 {
2545         union ccb *ccb;
2546         void *mode_buffer;
2547         struct scsi_mode_header_6 *mode_hdr;
2548         struct scsi_mode_blk_desc *mode_blk;
2549         int mode_buffer_len;
2550         struct sa_softc *softc;
2551         u_int8_t cpage;
2552         int error;
2553         cam_status status;
2554
2555         softc = (struct sa_softc *)periph->softc;
2556         ccb = cam_periph_getccb(periph, 1);
2557         if (softc->quirks & SA_QUIRK_NO_CPAGE)
2558                 cpage = SA_DEVICE_CONFIGURATION_PAGE;
2559         else
2560                 cpage = SA_DATA_COMPRESSION_PAGE;
2561
2562 retry:
2563         mode_buffer_len = sizeof(*mode_hdr) + sizeof(*mode_blk);
2564
2565         if (params_to_get & SA_PARAM_COMPRESSION) {
2566                 if (softc->quirks & SA_QUIRK_NOCOMP) {
2567                         *comp_supported = FALSE;
2568                         params_to_get &= ~SA_PARAM_COMPRESSION;
2569                 } else
2570                         mode_buffer_len += sizeof (sa_comp_t);
2571         }
2572
2573         mode_buffer = kmalloc(mode_buffer_len, M_SCSISA, M_INTWAIT | M_ZERO);
2574         mode_hdr = (struct scsi_mode_header_6 *)mode_buffer;
2575         mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1];
2576
2577         /* it is safe to retry this */
2578         scsi_mode_sense(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, FALSE,
2579             SMS_PAGE_CTRL_CURRENT, (params_to_get & SA_PARAM_COMPRESSION) ?
2580             cpage : SMS_VENDOR_SPECIFIC_PAGE, mode_buffer, mode_buffer_len,
2581             SSD_FULL_SIZE, SCSIOP_TIMEOUT);
2582
2583         error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
2584             &softc->device_stats);
2585         QFRLS(ccb);
2586
2587         status = ccb->ccb_h.status & CAM_STATUS_MASK;
2588
2589         if (error == EINVAL && (params_to_get & SA_PARAM_COMPRESSION) != 0) {
2590                 /*
2591                  * Hmm. Let's see if we can try another page...
2592                  * If we've already done that, give up on compression
2593                  * for this device and remember this for the future
2594                  * and attempt the request without asking for compression
2595                  * info.
2596                  */
2597                 if (cpage == SA_DATA_COMPRESSION_PAGE) {
2598                         cpage = SA_DEVICE_CONFIGURATION_PAGE;
2599                         goto retry;
2600                 }
2601                 softc->quirks |= SA_QUIRK_NOCOMP;
2602                 kfree(mode_buffer, M_SCSISA);
2603                 goto retry;
2604         } else if (status == CAM_SCSI_STATUS_ERROR) {
2605                 /* Tell the user about the fatal error. */
2606                 scsi_sense_print(&ccb->csio);
2607                 goto sagetparamsexit;
2608         }
2609
2610         /*
2611          * If the user only wants the compression information, and
2612          * the device doesn't send back the block descriptor, it's
2613          * no big deal.  If the user wants more than just
2614          * compression, though, and the device doesn't pass back the
2615          * block descriptor, we need to send another mode sense to
2616          * get the block descriptor.
2617          */
2618         if ((mode_hdr->blk_desc_len == 0) &&
2619             (params_to_get & SA_PARAM_COMPRESSION) &&
2620             (params_to_get & ~(SA_PARAM_COMPRESSION))) {
2621
2622                 /*
2623                  * Decrease the mode buffer length by the size of
2624                  * the compression page, to make sure the data
2625                  * there doesn't get overwritten.
2626                  */
2627                 mode_buffer_len -= sizeof (sa_comp_t);
2628
2629                 /*
2630                  * Now move the compression page that we presumably
2631                  * got back down the memory chunk a little bit so
2632                  * it doesn't get spammed.
2633                  */
2634                 bcopy(&mode_hdr[0], &mode_hdr[1], sizeof (sa_comp_t));
2635                 bzero(&mode_hdr[0], sizeof (mode_hdr[0]));
2636
2637                 /*
2638                  * Now, we issue another mode sense and just ask
2639                  * for the block descriptor, etc.
2640                  */
2641
2642                 scsi_mode_sense(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, FALSE,
2643                     SMS_PAGE_CTRL_CURRENT, SMS_VENDOR_SPECIFIC_PAGE,
2644                     mode_buffer, mode_buffer_len, SSD_FULL_SIZE,
2645                     SCSIOP_TIMEOUT);
2646
2647                 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
2648                     &softc->device_stats);
2649                 QFRLS(ccb);
2650
2651                 if (error != 0)
2652                         goto sagetparamsexit;
2653         }
2654
2655         if (params_to_get & SA_PARAM_BLOCKSIZE)
2656                 *blocksize = scsi_3btoul(mode_blk->blklen);
2657
2658         if (params_to_get & SA_PARAM_NUMBLOCKS)
2659                 *numblocks = scsi_3btoul(mode_blk->nblocks);
2660
2661         if (params_to_get & SA_PARAM_BUFF_MODE)
2662                 *buff_mode = mode_hdr->dev_spec & SMH_SA_BUF_MODE_MASK;
2663
2664         if (params_to_get & SA_PARAM_DENSITY)
2665                 *density = mode_blk->density;
2666
2667         if (params_to_get & SA_PARAM_WP)
2668                 *write_protect = (mode_hdr->dev_spec & SMH_SA_WP)? TRUE : FALSE;
2669
2670         if (params_to_get & SA_PARAM_SPEED)
2671                 *speed = mode_hdr->dev_spec & SMH_SA_SPEED_MASK;
2672
2673         if (params_to_get & SA_PARAM_COMPRESSION) {
2674                 sa_comp_t *ntcs = (sa_comp_t *) &mode_blk[1];
2675                 if (cpage == SA_DATA_COMPRESSION_PAGE) {
2676                         struct scsi_data_compression_page *cp = &ntcs->dcomp;
2677                         *comp_supported =
2678                             (cp->dce_and_dcc & SA_DCP_DCC)? TRUE : FALSE;
2679                         *comp_enabled =
2680                             (cp->dce_and_dcc & SA_DCP_DCE)? TRUE : FALSE;
2681                         *comp_algorithm = scsi_4btoul(cp->comp_algorithm);
2682                 } else {
2683                         struct scsi_dev_conf_page *cp = &ntcs->dconf;
2684                         /*
2685                          * We don't really know whether this device supports
2686                          * Data Compression if the the algorithm field is
2687                          * zero. Just say we do.
2688                          */
2689                         *comp_supported = TRUE;
2690                         *comp_enabled =
2691                             (cp->sel_comp_alg != SA_COMP_NONE)? TRUE : FALSE;
2692                         *comp_algorithm = cp->sel_comp_alg;
2693                 }
2694                 if (tcs != NULL)
2695                         bcopy(ntcs, tcs, sizeof (sa_comp_t));
2696         }
2697
2698         if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
2699                 int idx;
2700                 char *xyz = mode_buffer;
2701                 xpt_print_path(periph->path);
2702                 kprintf("Mode Sense Data=");
2703                 for (idx = 0; idx < mode_buffer_len; idx++)
2704                         kprintf(" 0x%02x", xyz[idx] & 0xff);
2705                 kprintf("\n");
2706         }
2707
2708 sagetparamsexit:
2709
2710         xpt_release_ccb(ccb);
2711         kfree(mode_buffer, M_SCSISA);
2712         return (error);
2713 }
2714
2715 /*
2716  * The purpose of this function is to set one of four different parameters
2717  * for a tape drive:
2718  *      - blocksize
2719  *      - density
2720  *      - compression / compression algorithm
2721  *      - buffering mode
2722  *
2723  * The assumption is that this will be called from saioctl(), and therefore
2724  * from a process context.  Thus the waiting malloc calls below.  If that
2725  * assumption ever changes, the malloc calls should be changed to be
2726  * NOWAIT mallocs.
2727  *
2728  * Any or all of the four parameters may be set when this function is
2729  * called.  It should handle setting more than one parameter at once.
2730  */
2731 static int
2732 sasetparams(struct cam_periph *periph, sa_params params_to_set,
2733             u_int32_t blocksize, u_int8_t density, u_int32_t calg,
2734             u_int32_t sense_flags)
2735 {
2736         struct sa_softc *softc;
2737         u_int32_t current_blocksize;
2738         u_int32_t current_calg;
2739         u_int8_t current_density;
2740         u_int8_t current_speed;
2741         int comp_enabled, comp_supported;
2742         void *mode_buffer;
2743         int mode_buffer_len;
2744         struct scsi_mode_header_6 *mode_hdr;
2745         struct scsi_mode_blk_desc *mode_blk;
2746         sa_comp_t *ccomp, *cpage;
2747         int buff_mode;
2748         union ccb *ccb = NULL;
2749         int error;
2750
2751         softc = (struct sa_softc *)periph->softc;
2752
2753         ccomp = kmalloc(sizeof (sa_comp_t), M_SCSISA, M_INTWAIT);
2754
2755         /*
2756          * Since it doesn't make sense to set the number of blocks, or
2757          * write protection, we won't try to get the current value.  We
2758          * always want to get the blocksize, so we can set it back to the
2759          * proper value.
2760          */
2761         error = sagetparams(periph,
2762             params_to_set | SA_PARAM_BLOCKSIZE | SA_PARAM_SPEED,
2763             &current_blocksize, &current_density, NULL, &buff_mode, NULL,
2764             &current_speed, &comp_supported, &comp_enabled,
2765             &current_calg, ccomp);
2766
2767         if (error != 0) {
2768                 kfree(ccomp, M_SCSISA);
2769                 return (error);
2770         }
2771
2772         mode_buffer_len = sizeof(*mode_hdr) + sizeof(*mode_blk);
2773         if (params_to_set & SA_PARAM_COMPRESSION)
2774                 mode_buffer_len += sizeof (sa_comp_t);
2775
2776         mode_buffer = kmalloc(mode_buffer_len, M_SCSISA, M_INTWAIT | M_ZERO);
2777
2778         mode_hdr = (struct scsi_mode_header_6 *)mode_buffer;
2779         mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1];
2780
2781         ccb = cam_periph_getccb(periph, 1);
2782
2783 retry:
2784
2785         if (params_to_set & SA_PARAM_COMPRESSION) {
2786                 if (mode_blk) {
2787                         cpage = (sa_comp_t *)&mode_blk[1];
2788                 } else {
2789                         cpage = (sa_comp_t *)&mode_hdr[1];
2790                 }
2791                 bcopy(ccomp, cpage, sizeof (sa_comp_t));
2792                 cpage->hdr.pagecode &= ~0x80;
2793         } else
2794                 cpage = NULL;
2795
2796         /*
2797          * If the caller wants us to set the blocksize, use the one they
2798          * pass in.  Otherwise, use the blocksize we got back from the
2799          * mode select above.
2800          */
2801         if (mode_blk) {
2802                 if (params_to_set & SA_PARAM_BLOCKSIZE)
2803                         scsi_ulto3b(blocksize, mode_blk->blklen);
2804                 else
2805                         scsi_ulto3b(current_blocksize, mode_blk->blklen);
2806
2807                 /*
2808                  * Set density if requested, else preserve old density.
2809                  * SCSI_SAME_DENSITY only applies to SCSI-2 or better
2810                  * devices, else density we've latched up in our softc.
2811                  */
2812                 if (params_to_set & SA_PARAM_DENSITY) {
2813                         mode_blk->density = density;
2814                 } else if (softc->scsi_rev > SCSI_REV_CCS) {
2815                         mode_blk->density = SCSI_SAME_DENSITY;
2816                 } else {
2817                         mode_blk->density = softc->media_density;
2818                 }
2819         }
2820
2821         /*
2822          * For mode selects, these two fields must be zero.
2823          */
2824         mode_hdr->data_length = 0;
2825         mode_hdr->medium_type = 0;
2826
2827         /* set the speed to the current value */
2828         mode_hdr->dev_spec = current_speed;
2829
2830         /* if set, set single-initiator buffering mode */
2831         if (softc->buffer_mode == SMH_SA_BUF_MODE_SIBUF) {
2832                 mode_hdr->dev_spec |= SMH_SA_BUF_MODE_SIBUF;
2833         }
2834
2835         if (mode_blk)
2836                 mode_hdr->blk_desc_len = sizeof(struct scsi_mode_blk_desc);
2837         else
2838                 mode_hdr->blk_desc_len = 0;
2839
2840         /*
2841          * First, if the user wants us to set the compression algorithm or
2842          * just turn compression on, check to make sure that this drive
2843          * supports compression.
2844          */
2845         if (params_to_set & SA_PARAM_COMPRESSION) {
2846                 /*
2847                  * If the compression algorithm is 0, disable compression.
2848                  * If the compression algorithm is non-zero, enable
2849                  * compression and set the compression type to the
2850                  * specified compression algorithm, unless the algorithm is
2851                  * MT_COMP_ENABLE.  In that case, we look at the
2852                  * compression algorithm that is currently set and if it is
2853                  * non-zero, we leave it as-is.  If it is zero, and we have
2854                  * saved a compression algorithm from a time when
2855                  * compression was enabled before, set the compression to
2856                  * the saved value.
2857                  */
2858                 switch (ccomp->hdr.pagecode & ~0x80) {
2859                 case SA_DEVICE_CONFIGURATION_PAGE:
2860                 {
2861                         struct scsi_dev_conf_page *dcp = &cpage->dconf;
2862                         if (calg == 0) {
2863                                 dcp->sel_comp_alg = SA_COMP_NONE;
2864                                 break;
2865                         }
2866                         if (calg != MT_COMP_ENABLE) {
2867                                 dcp->sel_comp_alg = calg;
2868                         } else if (dcp->sel_comp_alg == SA_COMP_NONE &&
2869                             softc->saved_comp_algorithm != 0) {
2870                                 dcp->sel_comp_alg = softc->saved_comp_algorithm;
2871                         }
2872                         break;
2873                 }
2874                 case SA_DATA_COMPRESSION_PAGE:
2875                 if (ccomp->dcomp.dce_and_dcc & SA_DCP_DCC) {
2876                         struct scsi_data_compression_page *dcp = &cpage->dcomp;
2877                         if (calg == 0) {
2878                                 /*
2879                                  * Disable compression, but leave the
2880                                  * decompression and the capability bit
2881                                  * alone.
2882                                  */
2883                                 dcp->dce_and_dcc = SA_DCP_DCC;
2884                                 dcp->dde_and_red |= SA_DCP_DDE;
2885                                 break;
2886                         }
2887                         /* enable compression && decompression */
2888                         dcp->dce_and_dcc = SA_DCP_DCE | SA_DCP_DCC;
2889                         dcp->dde_and_red |= SA_DCP_DDE;
2890                         /*
2891                          * If there, use compression algorithm from caller.
2892                          * Otherwise, if there's a saved compression algorithm
2893                          * and there is no current algorithm, use the saved
2894                          * algorithm. Else parrot back what we got and hope
2895                          * for the best.
2896                          */
2897                         if (calg != MT_COMP_ENABLE) {
2898                                 scsi_ulto4b(calg, dcp->comp_algorithm);
2899                                 scsi_ulto4b(calg, dcp->decomp_algorithm);
2900                         } else if (scsi_4btoul(dcp->comp_algorithm) == 0 &&
2901                             softc->saved_comp_algorithm != 0) {
2902                                 scsi_ulto4b(softc->saved_comp_algorithm,
2903                                     dcp->comp_algorithm);
2904                                 scsi_ulto4b(softc->saved_comp_algorithm,
2905                                     dcp->decomp_algorithm);
2906                         }
2907                         break;
2908                 }
2909                 /*
2910                  * Compression does not appear to be supported-
2911                  * at least via the DATA COMPRESSION page. It
2912                  * would be too much to ask us to believe that
2913                  * the page itself is supported, but incorrectly
2914                  * reports an ability to manipulate data compression,
2915                  * so we'll assume that this device doesn't support
2916                  * compression. We can just fall through for that.
2917                  */
2918                 /* FALLTHROUGH */
2919                 default:
2920                         /*
2921                          * The drive doesn't seem to support compression,
2922                          * so turn off the set compression bit.
2923                          */
2924                         params_to_set &= ~SA_PARAM_COMPRESSION;
2925                         xpt_print(periph->path,
2926                             "device does not seem to support compression\n");
2927
2928                         /*
2929                          * If that was the only thing the user wanted us to set,
2930                          * clean up allocated resources and return with
2931                          * 'operation not supported'.
2932                          */
2933                         if (params_to_set == SA_PARAM_NONE) {
2934                                 kfree(mode_buffer, M_SCSISA);
2935                                 xpt_release_ccb(ccb);
2936                                 return (ENODEV);
2937                         }
2938
2939                         /*
2940                          * That wasn't the only thing the user wanted us to set.
2941                          * So, decrease the stated mode buffer length by the
2942                          * size of the compression mode page.
2943                          */
2944                         mode_buffer_len -= sizeof(sa_comp_t);
2945                 }
2946         }
2947
2948         /* It is safe to retry this operation */
2949         scsi_mode_select(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG,
2950             (params_to_set & SA_PARAM_COMPRESSION)? TRUE : FALSE,
2951             FALSE, mode_buffer, mode_buffer_len, SSD_FULL_SIZE, SCSIOP_TIMEOUT);
2952
2953         error = cam_periph_runccb(ccb, saerror, 0,
2954             sense_flags, &softc->device_stats);
2955         QFRLS(ccb);
2956
2957         if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
2958                 int idx;
2959                 char *xyz = mode_buffer;
2960                 xpt_print_path(periph->path);
2961                 kprintf("Err%d, Mode Select Data=", error);
2962                 for (idx = 0; idx < mode_buffer_len; idx++)
2963                         kprintf(" 0x%02x", xyz[idx] & 0xff);
2964                 kprintf("\n");
2965         }
2966
2967
2968         if (error) {
2969                 /*
2970                  * If we can, try without setting density/blocksize.
2971                  */
2972                 if (mode_blk) {
2973                         if ((params_to_set &
2974                             (SA_PARAM_DENSITY|SA_PARAM_BLOCKSIZE)) == 0) {
2975                                 mode_blk = NULL;
2976                                 goto retry;
2977                         }
2978                 } else {
2979                         mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1];
2980                         cpage = (sa_comp_t *)&mode_blk[1];
2981                 }
2982
2983                 /*
2984                  * If we were setting the blocksize, and that failed, we
2985                  * want to set it to its original value.  If we weren't
2986                  * setting the blocksize, we don't want to change it.
2987                  */
2988                 scsi_ulto3b(current_blocksize, mode_blk->blklen);
2989
2990                 /*
2991                  * Set density if requested, else preserve old density.
2992                  * SCSI_SAME_DENSITY only applies to SCSI-2 or better
2993                  * devices, else density we've latched up in our softc.
2994                  */
2995                 if (params_to_set & SA_PARAM_DENSITY) {
2996                         mode_blk->density = current_density;
2997                 } else if (softc->scsi_rev > SCSI_REV_CCS) {
2998                         mode_blk->density = SCSI_SAME_DENSITY;
2999                 } else {
3000                         mode_blk->density = softc->media_density;
3001                 }
3002
3003                 if (params_to_set & SA_PARAM_COMPRESSION)
3004                         bcopy(ccomp, cpage, sizeof (sa_comp_t));
3005
3006                 /*
3007                  * The retry count is the only CCB field that might have been
3008                  * changed that we care about, so reset it back to 1.
3009                  */
3010                 ccb->ccb_h.retry_count = 1;
3011                 cam_periph_runccb(ccb, saerror, 0, sense_flags,
3012                     &softc->device_stats);
3013                 QFRLS(ccb);
3014         }
3015
3016         xpt_release_ccb(ccb);
3017
3018         if (ccomp != NULL)
3019                 kfree(ccomp, M_SCSISA);
3020
3021         if (params_to_set & SA_PARAM_COMPRESSION) {
3022                 if (error) {
3023                         softc->flags &= ~SA_FLAG_COMP_ENABLED;
3024                         /*
3025                          * Even if we get an error setting compression,
3026                          * do not say that we don't support it. We could
3027                          * have been wrong, or it may be media specific.
3028                          *      softc->flags &= ~SA_FLAG_COMP_SUPP;
3029                          */
3030                         softc->saved_comp_algorithm = softc->comp_algorithm;
3031                         softc->comp_algorithm = 0;
3032                 } else {
3033                         softc->flags |= SA_FLAG_COMP_ENABLED;
3034                         softc->comp_algorithm = calg;
3035                 }
3036         }
3037
3038         kfree(mode_buffer, M_SCSISA);
3039         return (error);
3040 }
3041
3042 static void
3043 saprevent(struct cam_periph *periph, int action)
3044 {
3045         struct  sa_softc *softc;
3046         union   ccb *ccb;
3047         int     error, sf;
3048
3049         softc = (struct sa_softc *)periph->softc;
3050
3051         if ((action == PR_ALLOW) && (softc->flags & SA_FLAG_TAPE_LOCKED) == 0)
3052                 return;
3053         if ((action == PR_PREVENT) && (softc->flags & SA_FLAG_TAPE_LOCKED) != 0)
3054                 return;
3055
3056         /*
3057          * We can be quiet about illegal requests.
3058          */
3059         if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
3060                 sf = 0;
3061         } else
3062                 sf = SF_QUIET_IR;
3063
3064         ccb = cam_periph_getccb(periph, 1);
3065
3066         /* It is safe to retry this operation */
3067         scsi_prevent(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, action,
3068             SSD_FULL_SIZE, SCSIOP_TIMEOUT);
3069
3070         error = cam_periph_runccb(ccb, saerror, 0, sf, &softc->device_stats);
3071         QFRLS(ccb);
3072         if (error == 0) {
3073                 if (action == PR_ALLOW)
3074                         softc->flags &= ~SA_FLAG_TAPE_LOCKED;
3075                 else
3076                         softc->flags |= SA_FLAG_TAPE_LOCKED;
3077         }
3078
3079         xpt_release_ccb(ccb);
3080 }
3081
3082 static int
3083 sarewind(struct cam_periph *periph)
3084 {
3085         union   ccb *ccb;
3086         struct  sa_softc *softc;
3087         int     error;
3088
3089         softc = (struct sa_softc *)periph->softc;
3090
3091         ccb = cam_periph_getccb(periph, 1);
3092
3093         /* It is safe to retry this operation */
3094         scsi_rewind(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, FALSE,
3095             SSD_FULL_SIZE, REWIND_TIMEOUT);
3096
3097         softc->dsreg = MTIO_DSREG_REW;
3098         error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats);
3099         softc->dsreg = MTIO_DSREG_REST;
3100
3101         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3102                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE);
3103
3104         xpt_release_ccb(ccb);
3105         if (error == 0)
3106                 softc->fileno = softc->blkno = (daddr_t) 0;
3107         else
3108                 softc->fileno = softc->blkno = (daddr_t) -1;
3109         return (error);
3110 }
3111
3112 static int
3113 saspace(struct cam_periph *periph, int count, scsi_space_code code)
3114 {
3115         union   ccb *ccb;
3116         struct  sa_softc *softc;
3117         int     error;
3118
3119         softc = (struct sa_softc *)periph->softc;
3120
3121         ccb = cam_periph_getccb(periph, 1);
3122
3123         /* This cannot be retried */
3124
3125         scsi_space(&ccb->csio, 0, sadone, MSG_SIMPLE_Q_TAG, code, count,
3126             SSD_FULL_SIZE, SPACE_TIMEOUT);
3127
3128         /*
3129          * Clear residual because we will be using it.
3130          */
3131         softc->last_ctl_resid = 0;
3132
3133         softc->dsreg = (count < 0)? MTIO_DSREG_REV : MTIO_DSREG_FWD;
3134         error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats);
3135         softc->dsreg = MTIO_DSREG_REST;
3136
3137         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3138                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE);
3139
3140         xpt_release_ccb(ccb);
3141
3142         /*
3143          * If a spacing operation has failed, we need to invalidate
3144          * this mount.
3145          *
3146          * If the spacing operation was setmarks or to end of recorded data,
3147          * we no longer know our relative position.
3148          *
3149          * If the spacing operations was spacing files in reverse, we
3150          * take account of the residual, but still check against less
3151          * than zero- if we've gone negative, we must have hit BOT.
3152          *
3153          * If the spacing operations was spacing records in reverse and
3154          * we have a residual, we've either hit BOT or hit a filemark.
3155          * In the former case, we know our new record number (0). In
3156          * the latter case, we have absolutely no idea what the real
3157          * record number is- we've stopped between the end of the last
3158          * record in the previous file and the filemark that stopped
3159          * our spacing backwards.
3160          */
3161         if (error) {
3162                 softc->fileno = softc->blkno = (daddr_t) -1;
3163         } else if (code == SS_SETMARKS || code == SS_EOD) {
3164                 softc->fileno = softc->blkno = (daddr_t) -1;
3165         } else if (code == SS_FILEMARKS && softc->fileno != (daddr_t) -1) {
3166                 softc->fileno += (count - softc->last_ctl_resid);
3167                 if (softc->fileno < 0)  /* we must of hit BOT */
3168                         softc->fileno = 0;
3169                 softc->blkno = 0;
3170         } else if (code == SS_BLOCKS && softc->blkno != (daddr_t) -1) {
3171                 softc->blkno += (count - softc->last_ctl_resid);
3172                 if (count < 0) {
3173                         if (softc->last_ctl_resid || softc->blkno < 0) {
3174                                 if (softc->fileno == 0) {
3175                                         softc->blkno = 0;
3176                                 } else {
3177                                         softc->blkno = (daddr_t) -1;
3178                                 }
3179                         }
3180                 }
3181         }
3182         return (error);
3183 }
3184
3185 static int
3186 sawritefilemarks(struct cam_periph *periph, int nmarks, int setmarks)
3187 {
3188         union   ccb *ccb;
3189         struct  sa_softc *softc;
3190         int     error, nwm = 0;
3191
3192         softc = (struct sa_softc *)periph->softc;
3193         if (softc->open_rdonly)
3194                 return (EBADF);
3195
3196         ccb = cam_periph_getccb(periph, 1);
3197         /*
3198          * Clear residual because we will be using it.
3199          */
3200         softc->last_ctl_resid = 0;
3201
3202         softc->dsreg = MTIO_DSREG_FMK;
3203         /* this *must* not be retried */
3204         scsi_write_filemarks(&ccb->csio, 0, sadone, MSG_SIMPLE_Q_TAG,
3205             FALSE, setmarks, nmarks, SSD_FULL_SIZE, IO_TIMEOUT);
3206         softc->dsreg = MTIO_DSREG_REST;
3207
3208
3209         error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats);
3210
3211         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3212                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE);
3213
3214         if (error == 0 && nmarks) {
3215                 struct sa_softc *softc = (struct sa_softc *)periph->softc;
3216                 nwm = nmarks - softc->last_ctl_resid;
3217                 softc->filemarks += nwm;
3218         }
3219
3220         xpt_release_ccb(ccb);
3221
3222         /*
3223          * Update relative positions (if we're doing that).
3224          */
3225         if (error) {
3226                 softc->fileno = softc->blkno = (daddr_t) -1;
3227         } else if (softc->fileno != (daddr_t) -1) {
3228                 softc->fileno += nwm;
3229                 softc->blkno = 0;
3230         }
3231         return (error);
3232 }
3233
3234 static int
3235 sardpos(struct cam_periph *periph, int hard, u_int32_t *blkptr)
3236 {
3237         struct scsi_tape_position_data loc;
3238         union ccb *ccb;
3239         struct sa_softc *softc = (struct sa_softc *)periph->softc;
3240         int error;
3241
3242         /*
3243          * We try and flush any buffered writes here if we were writing
3244          * and we're trying to get hardware block position. It eats
3245          * up performance substantially, but I'm wary of drive firmware.
3246          *
3247          * I think that *logical* block position is probably okay-
3248          * but hardware block position might have to wait for data
3249          * to hit media to be valid. Caveat Emptor.
3250          */
3251
3252         if (hard && (softc->flags & SA_FLAG_TAPE_WRITTEN)) {
3253                 error = sawritefilemarks(periph, 0, 0);
3254                 if (error && error != EACCES)
3255                         return (error);
3256         }
3257
3258         ccb = cam_periph_getccb(periph, 1);
3259         scsi_read_position(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG,
3260             hard, &loc, SSD_FULL_SIZE, SCSIOP_TIMEOUT);
3261         softc->dsreg = MTIO_DSREG_RBSY;
3262         error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats);
3263         softc->dsreg = MTIO_DSREG_REST;
3264         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3265                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, 0);
3266
3267         if (error == 0) {
3268                 if (loc.flags & SA_RPOS_UNCERTAIN) {
3269                         error = EINVAL;         /* nothing is certain */
3270                 } else {
3271                         *blkptr = scsi_4btoul(loc.firstblk);
3272                 }
3273         }
3274
3275         xpt_release_ccb(ccb);
3276         return (error);
3277 }
3278
3279 static int
3280 sasetpos(struct cam_periph *periph, int hard, u_int32_t *blkptr)
3281 {
3282         union ccb *ccb;
3283         struct sa_softc *softc;
3284         int error;
3285
3286         /*
3287          * We used to try and flush any buffered writes here.
3288          * Now we push this onto user applications to either
3289          * flush the pending writes themselves (via a zero count
3290          * WRITE FILEMARKS command) or they can trust their tape
3291          * drive to do this correctly for them.
3292          */
3293
3294         softc = (struct sa_softc *)periph->softc;
3295         ccb = cam_periph_getccb(periph, 1);
3296
3297
3298         scsi_set_position(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG,
3299             hard, *blkptr, SSD_FULL_SIZE, SPACE_TIMEOUT);
3300
3301
3302         softc->dsreg = MTIO_DSREG_POS;
3303         error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats);
3304         softc->dsreg = MTIO_DSREG_REST;
3305         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3306                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, 0);
3307         xpt_release_ccb(ccb);
3308         /*
3309          * Note relative file && block number position as now unknown.
3310          */
3311         softc->fileno = softc->blkno = (daddr_t) -1;
3312         return (error);
3313 }
3314
3315 static int
3316 saretension(struct cam_periph *periph)
3317 {
3318         union ccb *ccb;
3319         struct sa_softc *softc;
3320         int error;
3321
3322         softc = (struct sa_softc *)periph->softc;
3323
3324         ccb = cam_periph_getccb(periph, 1);
3325
3326         /* It is safe to retry this operation */
3327         scsi_load_unload(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, FALSE,
3328             FALSE, TRUE,  TRUE, SSD_FULL_SIZE, ERASE_TIMEOUT);
3329
3330         softc->dsreg = MTIO_DSREG_TEN;
3331         error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats);
3332         softc->dsreg = MTIO_DSREG_REST;
3333
3334         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3335                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE);
3336         xpt_release_ccb(ccb);
3337         if (error == 0)
3338                 softc->fileno = softc->blkno = (daddr_t) 0;
3339         else
3340                 softc->fileno = softc->blkno = (daddr_t) -1;
3341         return (error);
3342 }
3343
3344 static int
3345 sareservereleaseunit(struct cam_periph *periph, int reserve)
3346 {
3347         union ccb *ccb;
3348         struct sa_softc *softc;
3349         int error;
3350
3351         softc = (struct sa_softc *)periph->softc;
3352         ccb = cam_periph_getccb(periph,  1);
3353
3354         /* It is safe to retry this operation */
3355         scsi_reserve_release_unit(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG,
3356             FALSE,  0, SSD_FULL_SIZE,  SCSIOP_TIMEOUT, reserve);
3357         softc->dsreg = MTIO_DSREG_RBSY;
3358         error = cam_periph_runccb(ccb, saerror, 0,
3359             SF_RETRY_UA | SF_NO_PRINT, &softc->device_stats);
3360         softc->dsreg = MTIO_DSREG_REST;
3361         QFRLS(ccb);
3362         xpt_release_ccb(ccb);
3363
3364         /*
3365          * If the error was Illegal Request, then the device doesn't support
3366          * RESERVE/RELEASE. This is not an error.
3367          */
3368         if (error == EINVAL) {
3369                 error = 0;
3370         }
3371
3372         return (error);
3373 }
3374
3375 static int
3376 saloadunload(struct cam_periph *periph, int load)
3377 {
3378         union   ccb *ccb;
3379         struct  sa_softc *softc;
3380         int     error;
3381
3382         softc = (struct sa_softc *)periph->softc;
3383
3384         ccb = cam_periph_getccb(periph, 1);
3385
3386         /* It is safe to retry this operation */
3387         scsi_load_unload(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, FALSE,
3388             FALSE, FALSE, load, SSD_FULL_SIZE, REWIND_TIMEOUT);
3389
3390         softc->dsreg = (load)? MTIO_DSREG_LD : MTIO_DSREG_UNL;
3391         error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats);
3392         softc->dsreg = MTIO_DSREG_REST;
3393         QFRLS(ccb);
3394         xpt_release_ccb(ccb);
3395
3396         if (error || load == 0)
3397                 softc->fileno = softc->blkno = (daddr_t) -1;
3398         else if (error == 0)
3399                 softc->fileno = softc->blkno = (daddr_t) 0;
3400         return (error);
3401 }
3402
3403 static int
3404 saerase(struct cam_periph *periph, int longerase)
3405 {
3406
3407         union   ccb *ccb;
3408         struct  sa_softc *softc;
3409         int error;
3410
3411         softc = (struct sa_softc *)periph->softc;
3412         if (softc->open_rdonly)
3413                 return (EBADF);
3414
3415         ccb = cam_periph_getccb(periph, 1);
3416
3417         scsi_erase(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG, FALSE, longerase,
3418             SSD_FULL_SIZE, ERASE_TIMEOUT);
3419
3420         softc->dsreg = MTIO_DSREG_ZER;
3421         error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats);
3422         softc->dsreg = MTIO_DSREG_REST;
3423
3424         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3425                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE);
3426         xpt_release_ccb(ccb);
3427         return (error);
3428 }
3429
3430 #endif /* _KERNEL */
3431
3432 /*
3433  * Read tape block limits command.
3434  */
3435 void
3436 scsi_read_block_limits(struct ccb_scsiio *csio, u_int32_t retries,
3437                    void (*cbfcnp)(struct cam_periph *, union ccb *),
3438                    u_int8_t tag_action,
3439                    struct scsi_read_block_limits_data *rlimit_buf,
3440                    u_int8_t sense_len, u_int32_t timeout)
3441 {
3442         struct scsi_read_block_limits *scsi_cmd;
3443
3444         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_IN, tag_action,
3445              (u_int8_t *)rlimit_buf, sizeof(*rlimit_buf), sense_len,
3446              sizeof(*scsi_cmd), timeout);
3447
3448         scsi_cmd = (struct scsi_read_block_limits *)&csio->cdb_io.cdb_bytes;
3449         bzero(scsi_cmd, sizeof(*scsi_cmd));
3450         scsi_cmd->opcode = READ_BLOCK_LIMITS;
3451 }
3452
3453 void
3454 scsi_sa_read_write(struct ccb_scsiio *csio, u_int32_t retries,
3455                    void (*cbfcnp)(struct cam_periph *, union ccb *),
3456                    u_int8_t tag_action, int readop, int sli,
3457                    int fixed, u_int32_t length, u_int8_t *data_ptr,
3458                    u_int32_t dxfer_len, u_int8_t sense_len, u_int32_t timeout)
3459 {
3460         struct scsi_sa_rw *scsi_cmd;
3461
3462         scsi_cmd = (struct scsi_sa_rw *)&csio->cdb_io.cdb_bytes;
3463         scsi_cmd->opcode = readop ? SA_READ : SA_WRITE;
3464         scsi_cmd->sli_fixed = 0;
3465         if (sli && readop)
3466                 scsi_cmd->sli_fixed |= SAR_SLI;
3467         if (fixed)
3468                 scsi_cmd->sli_fixed |= SARW_FIXED;
3469         scsi_ulto3b(length, scsi_cmd->length);
3470         scsi_cmd->control = 0;
3471
3472         cam_fill_csio(csio, retries, cbfcnp, readop ? CAM_DIR_IN : CAM_DIR_OUT,
3473             tag_action, data_ptr, dxfer_len, sense_len,
3474             sizeof(*scsi_cmd), timeout);
3475 }
3476
3477 void
3478 scsi_load_unload(struct ccb_scsiio *csio, u_int32_t retries,
3479                  void (*cbfcnp)(struct cam_periph *, union ccb *),
3480                  u_int8_t tag_action, int immediate, int eot,
3481                  int reten, int load, u_int8_t sense_len,
3482                  u_int32_t timeout)
3483 {
3484         struct scsi_load_unload *scsi_cmd;
3485
3486         scsi_cmd = (struct scsi_load_unload *)&csio->cdb_io.cdb_bytes;
3487         bzero(scsi_cmd, sizeof(*scsi_cmd));
3488         scsi_cmd->opcode = LOAD_UNLOAD;
3489         if (immediate)
3490                 scsi_cmd->immediate = SLU_IMMED;
3491         if (eot)
3492                 scsi_cmd->eot_reten_load |= SLU_EOT;
3493         if (reten)
3494                 scsi_cmd->eot_reten_load |= SLU_RETEN;
3495         if (load)
3496                 scsi_cmd->eot_reten_load |= SLU_LOAD;
3497
3498         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action,
3499             NULL, 0, sense_len, sizeof(*scsi_cmd), timeout);
3500 }
3501
3502 void
3503 scsi_rewind(struct ccb_scsiio *csio, u_int32_t retries,
3504             void (*cbfcnp)(struct cam_periph *, union ccb *),
3505             u_int8_t tag_action, int immediate, u_int8_t sense_len,
3506             u_int32_t timeout)
3507 {
3508         struct scsi_rewind *scsi_cmd;
3509
3510         scsi_cmd = (struct scsi_rewind *)&csio->cdb_io.cdb_bytes;
3511         bzero(scsi_cmd, sizeof(*scsi_cmd));
3512         scsi_cmd->opcode = REWIND;
3513         if (immediate)
3514                 scsi_cmd->immediate = SREW_IMMED;
3515
3516         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
3517             0, sense_len, sizeof(*scsi_cmd), timeout);
3518 }
3519
3520 void
3521 scsi_space(struct ccb_scsiio *csio, u_int32_t retries,
3522            void (*cbfcnp)(struct cam_periph *, union ccb *),
3523            u_int8_t tag_action, scsi_space_code code,
3524            u_int32_t count, u_int8_t sense_len, u_int32_t timeout)
3525 {
3526         struct scsi_space *scsi_cmd;
3527
3528         scsi_cmd = (struct scsi_space *)&csio->cdb_io.cdb_bytes;
3529         scsi_cmd->opcode = SPACE;
3530         scsi_cmd->code = code;
3531         scsi_ulto3b(count, scsi_cmd->count);
3532         scsi_cmd->control = 0;
3533
3534         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
3535             0, sense_len, sizeof(*scsi_cmd), timeout);
3536 }
3537
3538 void
3539 scsi_write_filemarks(struct ccb_scsiio *csio, u_int32_t retries,
3540                      void (*cbfcnp)(struct cam_periph *, union ccb *),
3541                      u_int8_t tag_action, int immediate, int setmark,
3542                      u_int32_t num_marks, u_int8_t sense_len,
3543                      u_int32_t timeout)
3544 {
3545         struct scsi_write_filemarks *scsi_cmd;
3546
3547         scsi_cmd = (struct scsi_write_filemarks *)&csio->cdb_io.cdb_bytes;
3548         bzero(scsi_cmd, sizeof(*scsi_cmd));
3549         scsi_cmd->opcode = WRITE_FILEMARKS;
3550         if (immediate)
3551                 scsi_cmd->byte2 |= SWFMRK_IMMED;
3552         if (setmark)
3553                 scsi_cmd->byte2 |= SWFMRK_WSMK;
3554
3555         scsi_ulto3b(num_marks, scsi_cmd->num_marks);
3556
3557         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
3558             0, sense_len, sizeof(*scsi_cmd), timeout);
3559 }
3560
3561 /*
3562  * The reserve and release unit commands differ only by their opcodes.
3563  */
3564 void
3565 scsi_reserve_release_unit(struct ccb_scsiio *csio, u_int32_t retries,
3566                           void (*cbfcnp)(struct cam_periph *, union ccb *),
3567                           u_int8_t tag_action, int third_party,
3568                           int third_party_id, u_int8_t sense_len,
3569                           u_int32_t timeout, int reserve)
3570 {
3571         struct scsi_reserve_release_unit *scsi_cmd;
3572
3573         scsi_cmd = (struct scsi_reserve_release_unit *)&csio->cdb_io.cdb_bytes;
3574         bzero(scsi_cmd, sizeof(*scsi_cmd));
3575
3576         if (reserve)
3577                 scsi_cmd->opcode = RESERVE_UNIT;
3578         else
3579                 scsi_cmd->opcode = RELEASE_UNIT;
3580
3581         if (third_party) {
3582                 scsi_cmd->lun_thirdparty |= SRRU_3RD_PARTY;
3583                 scsi_cmd->lun_thirdparty |=
3584                         ((third_party_id << SRRU_3RD_SHAMT) & SRRU_3RD_MASK);
3585         }
3586
3587         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
3588             0, sense_len, sizeof(*scsi_cmd), timeout);
3589 }
3590
3591 void
3592 scsi_erase(struct ccb_scsiio *csio, u_int32_t retries,
3593            void (*cbfcnp)(struct cam_periph *, union ccb *),
3594            u_int8_t tag_action, int immediate, int long_erase,
3595            u_int8_t sense_len, u_int32_t timeout)
3596 {
3597         struct scsi_erase *scsi_cmd;
3598
3599         scsi_cmd = (struct scsi_erase *)&csio->cdb_io.cdb_bytes;
3600         bzero(scsi_cmd, sizeof(*scsi_cmd));
3601
3602         scsi_cmd->opcode = ERASE;
3603
3604         if (immediate)
3605                 scsi_cmd->lun_imm_long |= SE_IMMED;
3606
3607         if (long_erase)
3608                 scsi_cmd->lun_imm_long |= SE_LONG;
3609
3610         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
3611             0, sense_len, sizeof(*scsi_cmd), timeout);
3612 }
3613
3614 /*
3615  * Read Tape Position command.
3616  */
3617 void
3618 scsi_read_position(struct ccb_scsiio *csio, u_int32_t retries,
3619                    void (*cbfcnp)(struct cam_periph *, union ccb *),
3620                    u_int8_t tag_action, int hardsoft,
3621                    struct scsi_tape_position_data *sbp,
3622                    u_int8_t sense_len, u_int32_t timeout)
3623 {
3624         struct scsi_tape_read_position *scmd;
3625
3626         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_IN, tag_action,
3627             (u_int8_t *)sbp, sizeof (*sbp), sense_len, sizeof(*scmd), timeout);
3628         scmd = (struct scsi_tape_read_position *)&csio->cdb_io.cdb_bytes;
3629         bzero(scmd, sizeof(*scmd));
3630         scmd->opcode = READ_POSITION;
3631         scmd->byte1 = hardsoft;
3632 }
3633
3634 /*
3635  * Set Tape Position command.
3636  */
3637 void
3638 scsi_set_position(struct ccb_scsiio *csio, u_int32_t retries,
3639                    void (*cbfcnp)(struct cam_periph *, union ccb *),
3640                    u_int8_t tag_action, int hardsoft, u_int32_t blkno,
3641                    u_int8_t sense_len, u_int32_t timeout)
3642 {
3643         struct scsi_tape_locate *scmd;
3644
3645         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action,
3646             (u_int8_t *)NULL, 0, sense_len, sizeof(*scmd), timeout);
3647         scmd = (struct scsi_tape_locate *)&csio->cdb_io.cdb_bytes;
3648         bzero(scmd, sizeof(*scmd));
3649         scmd->opcode = LOCATE;
3650         if (hardsoft)
3651                 scmd->byte1 |= SA_SPOS_BT;
3652         scsi_ulto4b(blkno, scmd->blkaddr);
3653 }