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