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_takefirst(&softc->bio_queue)) != NULL) {
1388                 q_bp = q_bio->bio_buf;
1389                 q_bp->b_resid = q_bp->b_bcount;
1390                 q_bp->b_error = ENXIO;
1391                 q_bp->b_flags |= B_ERROR;
1392                 biodone(q_bio);
1393         }
1394         softc->queue_count = 0;
1395
1396         xpt_print(periph->path, "lost device\n");
1397
1398 }
1399
1400 static void
1401 sacleanup(struct cam_periph *periph)
1402 {
1403         struct sa_softc *softc;
1404
1405         softc = (struct sa_softc *)periph->softc;
1406
1407         devstat_remove_entry(&softc->device_stats);
1408
1409         cam_extend_release(saperiphs, periph->unit_number);
1410         xpt_print(periph->path, "removing device entry\n");
1411         dev_ops_remove_minor(&sa_ops, /*SA_UNITMASK,*/ SA_UNIT(periph->unit_number));
1412         kfree(softc, M_SCSISA);
1413 }
1414
1415 static void
1416 saasync(void *callback_arg, u_int32_t code,
1417         struct cam_path *path, void *arg)
1418 {
1419         struct cam_periph *periph;
1420
1421         periph = (struct cam_periph *)callback_arg;
1422         switch (code) {
1423         case AC_FOUND_DEVICE:
1424         {
1425                 struct ccb_getdev *cgd;
1426                 cam_status status;
1427
1428                 cgd = (struct ccb_getdev *)arg;
1429                 if (cgd == NULL)
1430                         break;
1431
1432                 if (SID_TYPE(&cgd->inq_data) != T_SEQUENTIAL)
1433                         break;
1434
1435                 /*
1436                  * Allocate a peripheral instance for
1437                  * this device and start the probe
1438                  * process.
1439                  */
1440                 status = cam_periph_alloc(saregister, saoninvalidate,
1441                                           sacleanup, sastart,
1442                                           "sa", CAM_PERIPH_BIO, cgd->ccb_h.path,
1443                                           saasync, AC_FOUND_DEVICE, cgd);
1444
1445                 if (status != CAM_REQ_CMP
1446                  && status != CAM_REQ_INPROG)
1447                         kprintf("saasync: Unable to probe new device "
1448                                 "due to status 0x%x\n", status);
1449                 break;
1450         }
1451         default:
1452                 cam_periph_async(periph, code, path, arg);
1453                 break;
1454         }
1455 }
1456
1457 static cam_status
1458 saregister(struct cam_periph *periph, void *arg)
1459 {
1460         struct sa_softc *softc;
1461         struct ccb_getdev *cgd;
1462         caddr_t match;
1463         int i;
1464
1465         cgd = (struct ccb_getdev *)arg;
1466         if (periph == NULL) {
1467                 kprintf("saregister: periph was NULL!!\n");
1468                 return (CAM_REQ_CMP_ERR);
1469         }
1470
1471         if (cgd == NULL) {
1472                 kprintf("saregister: no getdev CCB, can't register device\n");
1473                 return (CAM_REQ_CMP_ERR);
1474         }
1475
1476         softc = kmalloc(sizeof (*softc), M_SCSISA, M_INTWAIT | M_ZERO);
1477         softc->scsi_rev = SID_ANSI_REV(&cgd->inq_data);
1478         softc->state = SA_STATE_NORMAL;
1479         softc->fileno = (daddr_t) -1;
1480         softc->blkno = (daddr_t) -1;
1481
1482         bioq_init(&softc->bio_queue);
1483         periph->softc = softc;
1484         cam_extend_set(saperiphs, periph->unit_number, periph);
1485
1486         /*
1487          * See if this device has any quirks.
1488          */
1489         match = cam_quirkmatch((caddr_t)&cgd->inq_data,
1490                                (caddr_t)sa_quirk_table,
1491                                NELEM(sa_quirk_table),
1492                                sizeof(*sa_quirk_table), scsi_inquiry_match);
1493
1494         if (match != NULL) {
1495                 softc->quirks = ((struct sa_quirk_entry *)match)->quirks;
1496                 softc->last_media_blksize =
1497                     ((struct sa_quirk_entry *)match)->prefblk;
1498 #ifdef  CAMDEBUG
1499                 xpt_print(periph->path, "found quirk entry %d\n",
1500                     (int) (((struct sa_quirk_entry *) match) - sa_quirk_table));
1501 #endif
1502         } else
1503                 softc->quirks = SA_QUIRK_NONE;
1504
1505         /*
1506          * The SA driver supports a blocksize, but we don't know the
1507          * blocksize until we media is inserted.  So, set a flag to
1508          * indicate that the blocksize is unavailable right now.
1509          */
1510         cam_periph_unlock(periph);
1511         devstat_add_entry(&softc->device_stats, "sa", periph->unit_number, 0,
1512             DEVSTAT_BS_UNAVAILABLE, SID_TYPE(&cgd->inq_data) |
1513             DEVSTAT_TYPE_IF_SCSI, DEVSTAT_PRIORITY_TAPE);
1514
1515         make_dev(&sa_ops, SAMINOR(SA_CTLDEV,
1516             periph->unit_number, 0, SA_ATYPE_R), UID_ROOT, GID_OPERATOR,
1517             0660, "%s%d.ctl", periph->periph_name, periph->unit_number);
1518
1519         make_dev(&sa_ops, SAMINOR(SA_NOT_CTLDEV,
1520             periph->unit_number, 0, SA_ATYPE_R), UID_ROOT, GID_OPERATOR,
1521             0660, "%s%d", periph->periph_name, periph->unit_number);
1522
1523         make_dev(&sa_ops, SAMINOR(SA_NOT_CTLDEV,
1524             periph->unit_number, 0, SA_ATYPE_NR), UID_ROOT, GID_OPERATOR,
1525             0660, "n%s%d", periph->periph_name, periph->unit_number);
1526
1527         make_dev(&sa_ops, SAMINOR(SA_NOT_CTLDEV,
1528             periph->unit_number, 0, SA_ATYPE_ER), UID_ROOT, GID_OPERATOR,
1529             0660, "e%s%d", periph->periph_name, periph->unit_number);
1530
1531         for (i = 0; i < SA_NUM_MODES; i++) {
1532
1533                 make_dev(&sa_ops,
1534                     SAMINOR(SA_NOT_CTLDEV, periph->unit_number, i, SA_ATYPE_R),
1535                     UID_ROOT, GID_OPERATOR, 0660, "%s%d.%d",
1536                     periph->periph_name, periph->unit_number, i);
1537
1538                 make_dev(&sa_ops,
1539                     SAMINOR(SA_NOT_CTLDEV, periph->unit_number, i, SA_ATYPE_NR),
1540                     UID_ROOT, GID_OPERATOR, 0660, "n%s%d.%d",
1541                     periph->periph_name, periph->unit_number, i);
1542
1543
1544                 make_dev(&sa_ops,
1545                     SAMINOR(SA_NOT_CTLDEV, periph->unit_number, i, SA_ATYPE_ER),
1546                     UID_ROOT, GID_OPERATOR, 0660, "e%s%d.%d",
1547                     periph->periph_name, periph->unit_number, i);
1548         }
1549         cam_periph_lock(periph);
1550
1551         /*
1552          * Add an async callback so that we get
1553          * notified if this device goes away.
1554          */
1555         xpt_register_async(AC_LOST_DEVICE, saasync, periph, periph->path);
1556
1557         xpt_announce_periph(periph, NULL);
1558
1559         return (CAM_REQ_CMP);
1560 }
1561
1562 static void
1563 sastart(struct cam_periph *periph, union ccb *start_ccb)
1564 {
1565         struct sa_softc *softc;
1566
1567         softc = (struct sa_softc *)periph->softc;
1568
1569         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("sastart\n"));
1570
1571
1572         switch (softc->state) {
1573         case SA_STATE_NORMAL:
1574         {
1575                 /* Pull a buffer from the queue and get going on it */
1576                 struct buf *bp;
1577                 struct bio *bio;
1578
1579                 /*
1580                  * See if there is a buf with work for us to do..
1581                  */
1582                 bio = bioq_first(&softc->bio_queue);
1583                 if (periph->immediate_priority <= periph->pinfo.priority) {
1584                         CAM_DEBUG_PRINT(CAM_DEBUG_SUBTRACE,
1585                                         ("queuing for immediate ccb\n"));
1586                         Set_CCB_Type(start_ccb, SA_CCB_WAITING);
1587                         SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
1588                                           periph_links.sle);
1589                         periph->immediate_priority = CAM_PRIORITY_NONE;
1590                         wakeup(&periph->ccb_list);
1591                 } else if (bio == NULL) {
1592                         xpt_release_ccb(start_ccb);
1593                 } else if ((softc->flags & SA_FLAG_ERR_PENDING) != 0) {
1594                         struct bio *done_bio;
1595 again:
1596                         softc->queue_count--;
1597                         bioq_remove(&softc->bio_queue, bio);
1598                         bp = bio->bio_buf;
1599                         bp->b_resid = bp->b_bcount;
1600                         done_bio = bio;
1601                         if ((softc->flags & SA_FLAG_EOM_PENDING) != 0) {
1602                                 /*
1603                                  * We now just clear errors in this case
1604                                  * and let the residual be the notifier.
1605                                  */
1606                                 bp->b_error = 0;
1607                         } else if ((softc->flags & SA_FLAG_EOF_PENDING) != 0) {
1608                                 /*
1609                                  * This can only happen if we're reading
1610                                  * in fixed length mode. In this case,
1611                                  * we dump the rest of the list the
1612                                  * same way.
1613                                  */
1614                                 bp->b_error = 0;
1615                                 if (bioq_first(&softc->bio_queue) != NULL) {
1616                                         biodone(done_bio);
1617                                         goto again;
1618                                 }
1619                         } else if ((softc->flags & SA_FLAG_EIO_PENDING) != 0) {
1620                                 bp->b_error = EIO;
1621                                 bp->b_flags |= B_ERROR;
1622                         }
1623                         bio = bioq_first(&softc->bio_queue);
1624                         /*
1625                          * Only if we have no other buffers queued up
1626                          * do we clear the pending error flag.
1627                          */
1628                         if (bio == NULL)
1629                                 softc->flags &= ~SA_FLAG_ERR_PENDING;
1630                         CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
1631                             ("sastart- ERR_PENDING now 0x%x, bio is %sNULL, "
1632                             "%d more buffers queued up\n",
1633                             (softc->flags & SA_FLAG_ERR_PENDING),
1634                             (bio != NULL)? "not " : " ", softc->queue_count));
1635                         xpt_release_ccb(start_ccb);
1636                         biodone(done_bio);
1637                 } else {
1638                         u_int32_t length;
1639
1640                         bioq_remove(&softc->bio_queue, bio);
1641                         bp = bio->bio_buf;
1642                         softc->queue_count--;
1643
1644                         if ((softc->flags & SA_FLAG_FIXED) != 0) {
1645                                 if (softc->blk_shift != 0) {
1646                                         length =
1647                                             bp->b_bcount >> softc->blk_shift;
1648                                 } else if (softc->media_blksize != 0) {
1649                                         length =
1650                                             bp->b_bcount / softc->media_blksize;
1651                                 } else {
1652                                         bp->b_error = EIO;
1653                                         xpt_print(periph->path, "zero blocksize"
1654                                             " for FIXED length writes?\n");
1655                                         biodone(bio);
1656                                         break;
1657                                 }
1658 #if     0
1659                                 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_INFO,
1660                                     ("issuing a %d fixed record %s\n",
1661                                     length,  (bp->bio_cmd == BIO_READ)? "read" :
1662                                     "write"));
1663 #endif
1664                         } else {
1665                                 length = bp->b_bcount;
1666 #if     0
1667                                 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_INFO,
1668                                     ("issuing a %d variable byte %s\n",
1669                                     length,  (bp->bio_cmd == BIO_READ)? "read" :
1670                                     "write"));
1671 #endif
1672                         }
1673                         devstat_start_transaction(&softc->device_stats);
1674                         /*
1675                          * Some people have theorized that we should
1676                          * suppress illegal length indication if we are
1677                          * running in variable block mode so that we don't
1678                          * have to request sense every time our requested
1679                          * block size is larger than the written block.
1680                          * The residual information from the ccb allows
1681                          * us to identify this situation anyway.  The only
1682                          * problem with this is that we will not get
1683                          * information about blocks that are larger than
1684                          * our read buffer unless we set the block size
1685                          * in the mode page to something other than 0.
1686                          *
1687                          * I believe that this is a non-issue. If user apps
1688                          * don't adjust their read size to match our record
1689                          * size, that's just life. Anyway, the typical usage
1690                          * would be to issue, e.g., 64KB reads and occasionally
1691                          * have to do deal with 512 byte or 1KB intermediate
1692                          * records.
1693                          */
1694                         softc->dsreg = (bp->b_cmd == BUF_CMD_READ) ?
1695                             MTIO_DSREG_RD : MTIO_DSREG_WR;
1696                         scsi_sa_read_write(&start_ccb->csio, 0, sadone,
1697                             MSG_SIMPLE_Q_TAG, (bp->b_cmd == BUF_CMD_READ) != 0,
1698                             FALSE, (softc->flags & SA_FLAG_FIXED) != 0,
1699                             length, bp->b_data, bp->b_bcount, SSD_FULL_SIZE,
1700                             IO_TIMEOUT);
1701                         start_ccb->ccb_h.ccb_pflags &= ~SA_POSITION_UPDATED;
1702                         Set_CCB_Type(start_ccb, SA_CCB_BUFFER_IO);
1703                         start_ccb->ccb_h.ccb_bio = bio;
1704                         bio = bioq_first(&softc->bio_queue);
1705                         xpt_action(start_ccb);
1706                 }
1707
1708                 if (bio != NULL) {
1709                         /* Have more work to do, so ensure we stay scheduled */
1710                         xpt_schedule(periph, 1);
1711                 }
1712                 break;
1713         }
1714         case SA_STATE_ABNORMAL:
1715         default:
1716                 panic("state 0x%x in sastart", softc->state);
1717                 break;
1718         }
1719 }
1720
1721
1722 static void
1723 sadone(struct cam_periph *periph, union ccb *done_ccb)
1724 {
1725         struct sa_softc *softc;
1726         struct ccb_scsiio *csio;
1727
1728         softc = (struct sa_softc *)periph->softc;
1729         csio = &done_ccb->csio;
1730         switch (CCB_Type(csio)) {
1731         case SA_CCB_BUFFER_IO:
1732         {
1733                 struct buf *bp;
1734                 struct bio *bio;
1735                 int error;
1736
1737                 softc->dsreg = MTIO_DSREG_REST;
1738                 bio = (struct bio *)done_ccb->ccb_h.ccb_bio;
1739                 bp = bio->bio_buf;
1740                 error = 0;
1741                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
1742                         if ((error = saerror(done_ccb, 0, 0)) == ERESTART) {
1743                                 /*
1744                                  * A retry was scheduled, so just return.
1745                                  */
1746                                 return;
1747                         }
1748                 }
1749
1750                 if (error == EIO) {
1751                         struct buf *q_bp;
1752                         struct bio *q_bio;
1753
1754                         /*
1755                          * Catastrophic error. Mark the tape as frozen
1756                          * (we no longer know tape position).
1757                          *
1758                          * Return all queued I/O with EIO, and unfreeze
1759                          * our queue so that future transactions that
1760                          * attempt to fix this problem can get to the
1761                          * device.
1762                          *
1763                          */
1764
1765                         softc->flags |= SA_FLAG_TAPE_FROZEN;
1766                         while ((q_bio = bioq_takefirst(&softc->bio_queue)) != NULL) {
1767                                 q_bp = q_bio->bio_buf;
1768                                 q_bp->b_resid = q_bp->b_bcount;
1769                                 q_bp->b_error = EIO;
1770                                 q_bp->b_flags |= B_ERROR;
1771                                 biodone(q_bio);
1772                         }
1773                 }
1774                 if (error != 0) {
1775                         bp->b_resid = bp->b_bcount;
1776                         bp->b_error = error;
1777                         bp->b_flags |= B_ERROR;
1778                         /*
1779                          * In the error case, position is updated in saerror.
1780                          */
1781                 } else {
1782                         bp->b_resid = csio->resid;
1783                         bp->b_error = 0;
1784                         if (csio->resid != 0) {
1785                                 bp->b_flags |= B_ERROR;
1786                         }
1787                         if (bp->b_cmd != BUF_CMD_READ) {
1788                                 softc->flags |= SA_FLAG_TAPE_WRITTEN;
1789                                 softc->filemarks = 0;
1790                         }
1791                         if (!(csio->ccb_h.ccb_pflags & SA_POSITION_UPDATED) &&
1792                             (softc->blkno != (daddr_t) -1)) {
1793                                 if ((softc->flags & SA_FLAG_FIXED) != 0) {
1794                                         u_int32_t l;
1795                                         if (softc->blk_shift != 0) {
1796                                                 l = bp->b_bcount >>
1797                                                         softc->blk_shift;
1798                                         } else {
1799                                                 l = bp->b_bcount /
1800                                                         softc->media_blksize;
1801                                         }
1802                                         softc->blkno += (daddr_t) l;
1803                                 } else {
1804                                         softc->blkno++;
1805                                 }
1806                         }
1807                 }
1808                 /*
1809                  * If we had an error (immediate or pending),
1810                  * release the device queue now.
1811                  */
1812                 if (error || (softc->flags & SA_FLAG_ERR_PENDING))
1813                         cam_release_devq(done_ccb->ccb_h.path, 0, 0, 0, 0);
1814 #ifdef  CAMDEBUG
1815                 if (error || bp->b_resid) {
1816                         CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
1817                                   ("error %d resid %d count %d\n", error,
1818                                   bp->b_resid, bp->b_bcount));
1819                 }
1820 #endif
1821                 devstat_end_transaction_buf(&softc->device_stats, bp);
1822                 biodone(bio);
1823                 break;
1824         }
1825         case SA_CCB_WAITING:
1826         {
1827                 /* Caller will release the CCB */
1828                 wakeup(&done_ccb->ccb_h.cbfcnp);
1829                 return;
1830         }
1831         }
1832         xpt_release_ccb(done_ccb);
1833 }
1834
1835 /*
1836  * Mount the tape (make sure it's ready for I/O).
1837  *
1838  * oflags can be checked for 'kind' of open (read-only check) - later
1839  * dev can be checked for a control-mode or compression open - later
1840  */
1841 static int
1842 samount(struct cam_periph *periph, __unused int oflags, __unused cdev_t dev)
1843 {
1844         struct  sa_softc *softc;
1845         union   ccb *ccb;
1846         int     error;
1847
1848         softc = (struct sa_softc *)periph->softc;
1849
1850         /*
1851          * This should determine if something has happend since the last
1852          * open/mount that would invalidate the mount. We do *not* want
1853          * to retry this command- we just want the status. But we only
1854          * do this if we're mounted already- if we're not mounted,
1855          * we don't care about the unit read state and can instead use
1856          * this opportunity to attempt to reserve the tape unit.
1857          */
1858
1859         if (softc->flags & SA_FLAG_TAPE_MOUNTED) {
1860                 ccb = cam_periph_getccb(periph, 1);
1861                 scsi_test_unit_ready(&ccb->csio, 0, sadone,
1862                     MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT);
1863                 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1864                     &softc->device_stats);
1865                 QFRLS(ccb);
1866                 if (error == ENXIO) {
1867                         softc->flags &= ~SA_FLAG_TAPE_MOUNTED;
1868                         scsi_test_unit_ready(&ccb->csio, 0, sadone,
1869                             MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT);
1870                         error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1871                             &softc->device_stats);
1872                         QFRLS(ccb);
1873                 } else if (error) {
1874                         /*
1875                          * We don't need to freeze the tape because we
1876                          * will now attempt to rewind/load it.
1877                          */
1878                         softc->flags &= ~SA_FLAG_TAPE_MOUNTED;
1879                         if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
1880                                 xpt_print(periph->path,
1881                                     "error %d on TUR in samount\n", error);
1882                         }
1883                 }
1884         } else {
1885                 error = sareservereleaseunit(periph, TRUE);
1886                 if (error) {
1887                         return (error);
1888                 }
1889                 ccb = cam_periph_getccb(periph, 1);
1890                 scsi_test_unit_ready(&ccb->csio, 0, sadone,
1891                     MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT);
1892                 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1893                     &softc->device_stats);
1894                 QFRLS(ccb);
1895         }
1896
1897         if ((softc->flags & SA_FLAG_TAPE_MOUNTED) == 0) {
1898                 struct scsi_read_block_limits_data *rblim = NULL;
1899                 int comp_enabled = 0;           /* silence gcc */
1900                 int comp_supported = 0;         /* silence gcc */
1901                 u_int8_t write_protect = 0;     /* silence gcc */
1902                 u_int8_t guessing = 0;
1903
1904                 /*
1905                  * Clear out old state.
1906                  */
1907                 softc->flags &= ~(SA_FLAG_TAPE_WP|SA_FLAG_TAPE_WRITTEN|
1908                                   SA_FLAG_ERR_PENDING|SA_FLAG_COMP_ENABLED|
1909                                   SA_FLAG_COMP_SUPP|SA_FLAG_COMP_UNSUPP);
1910                 softc->filemarks = 0;
1911
1912                 /*
1913                  * *Very* first off, make sure we're loaded to BOT.
1914                  */
1915                 scsi_load_unload(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, FALSE,
1916                     FALSE, FALSE, 1, SSD_FULL_SIZE, REWIND_TIMEOUT);
1917                 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1918                     &softc->device_stats);
1919                 QFRLS(ccb);
1920
1921                 /*
1922                  * In case this doesn't work, do a REWIND instead
1923                  */
1924                 if (error) {
1925                         scsi_rewind(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG,
1926                             FALSE, SSD_FULL_SIZE, REWIND_TIMEOUT);
1927                         error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1928                                 &softc->device_stats);
1929                         QFRLS(ccb);
1930                 }
1931                 if (error) {
1932                         xpt_release_ccb(ccb);
1933                         goto exit;
1934                 }
1935
1936                 /*
1937                  * Do a dummy test read to force access to the
1938                  * media so that the drive will really know what's
1939                  * there. We actually don't really care what the
1940                  * blocksize on tape is and don't expect to really
1941                  * read a full record.
1942                  */
1943                 rblim = kmalloc(8192, M_SCSISA, M_INTWAIT);
1944
1945                 if ((softc->quirks & SA_QUIRK_NODREAD) == 0) {
1946                         scsi_sa_read_write(&ccb->csio, 0, sadone,
1947                             MSG_SIMPLE_Q_TAG, 1, FALSE, 0, 8192,
1948                             (void *) rblim, 8192, SSD_FULL_SIZE,
1949                             IO_TIMEOUT);
1950                         cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1951                             &softc->device_stats);
1952                         QFRLS(ccb);
1953                         scsi_rewind(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG,
1954                             FALSE, SSD_FULL_SIZE, REWIND_TIMEOUT);
1955                         error = cam_periph_runccb(ccb, saerror, CAM_RETRY_SELTO,
1956                             SF_NO_PRINT | SF_RETRY_UA,
1957                             &softc->device_stats);
1958                         QFRLS(ccb);
1959                         if (error) {
1960                                 xpt_print(periph->path,
1961                                     "unable to rewind after test read\n");
1962                                 xpt_release_ccb(ccb);
1963                                 goto exit;
1964                         }
1965                 }
1966
1967                 /*
1968                  * Next off, determine block limits.
1969                  */
1970                 scsi_read_block_limits(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG,
1971                     rblim, SSD_FULL_SIZE, SCSIOP_TIMEOUT);
1972
1973                 error = cam_periph_runccb(ccb, saerror, CAM_RETRY_SELTO,
1974                     SF_NO_PRINT | SF_RETRY_UA, &softc->device_stats);
1975
1976                 QFRLS(ccb);
1977                 xpt_release_ccb(ccb);
1978
1979                 if (error != 0) {
1980                         /*
1981                          * If it's less than SCSI-2, READ BLOCK LIMITS is not
1982                          * a MANDATORY command. Anyway- it doesn't matter-
1983                          * we can proceed anyway.
1984                          */
1985                         softc->blk_gran = 0;
1986                         softc->max_blk = ~0;
1987                         softc->min_blk = 0;
1988                 } else {
1989                         if (softc->scsi_rev >= SCSI_REV_SPC) {
1990                                 softc->blk_gran = RBL_GRAN(rblim);
1991                         } else {
1992                                 softc->blk_gran = 0;
1993                         }
1994                         /*
1995                          * We take max_blk == min_blk to mean a default to
1996                          * fixed mode- but note that whatever we get out of
1997                          * sagetparams below will actually determine whether
1998                          * we are actually *in* fixed mode.
1999                          */
2000                         softc->max_blk = scsi_3btoul(rblim->maximum);
2001                         softc->min_blk = scsi_2btoul(rblim->minimum);
2002
2003
2004                 }
2005                 /*
2006                  * Next, perform a mode sense to determine
2007                  * current density, blocksize, compression etc.
2008                  */
2009                 error = sagetparams(periph, SA_PARAM_ALL,
2010                                     &softc->media_blksize,
2011                                     &softc->media_density,
2012                                     &softc->media_numblks,
2013                                     &softc->buffer_mode, &write_protect,
2014                                     &softc->speed, &comp_supported,
2015                                     &comp_enabled, &softc->comp_algorithm,
2016                                     NULL);
2017
2018                 if (error != 0) {
2019                         /*
2020                          * We could work a little harder here. We could
2021                          * adjust our attempts to get information. It
2022                          * might be an ancient tape drive. If someone
2023                          * nudges us, we'll do that.
2024                          */
2025                         goto exit;
2026                 }
2027
2028                 /*
2029                  * If no quirk has determined that this is a device that is
2030                  * preferred to be in fixed or variable mode, now is the time
2031                  * to find out.
2032                  */
2033                 if ((softc->quirks & (SA_QUIRK_FIXED|SA_QUIRK_VARIABLE)) == 0) {
2034                         guessing = 1;
2035                         /*
2036                          * This could be expensive to find out. Luckily we
2037                          * only need to do this once. If we start out in
2038                          * 'default' mode, try and set ourselves to one
2039                          * of the densities that would determine a wad
2040                          * of other stuff. Go from highest to lowest.
2041                          */
2042                         if (softc->media_density == SCSI_DEFAULT_DENSITY) {
2043                                 int i;
2044                                 static u_int8_t ctry[] = {
2045                                         SCSI_DENSITY_HALFINCH_PE,
2046                                         SCSI_DENSITY_HALFINCH_6250C,
2047                                         SCSI_DENSITY_HALFINCH_6250,
2048                                         SCSI_DENSITY_HALFINCH_1600,
2049                                         SCSI_DENSITY_HALFINCH_800,
2050                                         SCSI_DENSITY_QIC_4GB,
2051                                         SCSI_DENSITY_QIC_2GB,
2052                                         SCSI_DENSITY_QIC_525_320,
2053                                         SCSI_DENSITY_QIC_150,
2054                                         SCSI_DENSITY_QIC_120,
2055                                         SCSI_DENSITY_QIC_24,
2056                                         SCSI_DENSITY_QIC_11_9TRK,
2057                                         SCSI_DENSITY_QIC_11_4TRK,
2058                                         SCSI_DENSITY_QIC_1320,
2059                                         SCSI_DENSITY_QIC_3080,
2060                                         0
2061                                 };
2062                                 for (i = 0; ctry[i]; i++) {
2063                                         error = sasetparams(periph,
2064                                             SA_PARAM_DENSITY, 0, ctry[i],
2065                                             0, SF_NO_PRINT);
2066                                         if (error == 0) {
2067                                                 softc->media_density = ctry[i];
2068                                                 break;
2069                                         }
2070                                 }
2071                         }
2072                         switch (softc->media_density) {
2073                         case SCSI_DENSITY_QIC_11_4TRK:
2074                         case SCSI_DENSITY_QIC_11_9TRK:
2075                         case SCSI_DENSITY_QIC_24:
2076                         case SCSI_DENSITY_QIC_120:
2077                         case SCSI_DENSITY_QIC_150:
2078                         case SCSI_DENSITY_QIC_525_320:
2079                         case SCSI_DENSITY_QIC_1320:
2080                         case SCSI_DENSITY_QIC_3080:
2081                                 softc->quirks &= ~SA_QUIRK_2FM;
2082                                 softc->quirks |= SA_QUIRK_FIXED|SA_QUIRK_1FM;
2083                                 softc->last_media_blksize = 512;
2084                                 break;
2085                         case SCSI_DENSITY_QIC_4GB:
2086                         case SCSI_DENSITY_QIC_2GB:
2087                                 softc->quirks &= ~SA_QUIRK_2FM;
2088                                 softc->quirks |= SA_QUIRK_FIXED|SA_QUIRK_1FM;
2089                                 softc->last_media_blksize = 1024;
2090                                 break;
2091                         default:
2092                                 softc->last_media_blksize =
2093                                     softc->media_blksize;
2094                                 softc->quirks |= SA_QUIRK_VARIABLE;
2095                                 break;
2096                         }
2097                 }
2098
2099                 /*
2100                  * If no quirk has determined that this is a device that needs
2101                  * to have 2 Filemarks at EOD, now is the time to find out.
2102                  */
2103
2104                 if ((softc->quirks & SA_QUIRK_2FM) == 0) {
2105                         switch (softc->media_density) {
2106                         case SCSI_DENSITY_HALFINCH_800:
2107                         case SCSI_DENSITY_HALFINCH_1600:
2108                         case SCSI_DENSITY_HALFINCH_6250:
2109                         case SCSI_DENSITY_HALFINCH_6250C:
2110                         case SCSI_DENSITY_HALFINCH_PE:
2111                                 softc->quirks &= ~SA_QUIRK_1FM;
2112                                 softc->quirks |= SA_QUIRK_2FM;
2113                                 break;
2114                         default:
2115                                 break;
2116                         }
2117                 }
2118
2119                 /*
2120                  * Now validate that some info we got makes sense.
2121                  */
2122                 if ((softc->max_blk < softc->media_blksize) ||
2123                     (softc->min_blk > softc->media_blksize &&
2124                     softc->media_blksize)) {
2125                         xpt_print(periph->path,
2126                             "BLOCK LIMITS (%d..%d) could not match current "
2127                             "block settings (%d)- adjusting\n", softc->min_blk,
2128                             softc->max_blk, softc->media_blksize);
2129                         softc->max_blk = softc->min_blk =
2130                             softc->media_blksize;
2131                 }
2132
2133                 /*
2134                  * Now put ourselves into the right frame of mind based
2135                  * upon quirks...
2136                  */
2137 tryagain:
2138                 /*
2139                  * If we want to be in FIXED mode and our current blocksize
2140                  * is not equal to our last blocksize (if nonzero), try and
2141                  * set ourselves to this last blocksize (as the 'preferred'
2142                  * block size).  The initial quirkmatch at registry sets the
2143                  * initial 'last' blocksize. If, for whatever reason, this
2144                  * 'last' blocksize is zero, set the blocksize to 512,
2145                  * or min_blk if that's larger.
2146                  */
2147                 if ((softc->quirks & SA_QUIRK_FIXED) &&
2148                     (softc->quirks & SA_QUIRK_NO_MODESEL) == 0 &&
2149                     (softc->media_blksize != softc->last_media_blksize)) {
2150                         softc->media_blksize = softc->last_media_blksize;
2151                         if (softc->media_blksize == 0) {
2152                                 softc->media_blksize = 512;
2153                                 if (softc->media_blksize < softc->min_blk) {
2154                                         softc->media_blksize = softc->min_blk;
2155                                 }
2156                         }
2157                         error = sasetparams(periph, SA_PARAM_BLOCKSIZE,
2158                             softc->media_blksize, 0, 0, SF_NO_PRINT);
2159                         if (error) {
2160                                 xpt_print(periph->path,
2161                                     "unable to set fixed blocksize to %d\n",
2162                                     softc->media_blksize);
2163                                 goto exit;
2164                         }
2165                 }
2166
2167                 if ((softc->quirks & SA_QUIRK_VARIABLE) &&
2168                     (softc->media_blksize != 0)) {
2169                         softc->last_media_blksize = softc->media_blksize;
2170                         softc->media_blksize = 0;
2171                         error = sasetparams(periph, SA_PARAM_BLOCKSIZE,
2172                             0, 0, 0, SF_NO_PRINT);
2173                         if (error) {
2174                                 /*
2175                                  * If this fails and we were guessing, just
2176                                  * assume that we got it wrong and go try
2177                                  * fixed block mode. Don't even check against
2178                                  * density code at this point.
2179                                  */
2180                                 if (guessing) {
2181                                         softc->quirks &= ~SA_QUIRK_VARIABLE;
2182                                         softc->quirks |= SA_QUIRK_FIXED;
2183                                         if (softc->last_media_blksize == 0)
2184                                                 softc->last_media_blksize = 512;
2185                                         goto tryagain;
2186                                 }
2187                                 xpt_print(periph->path,
2188                                     "unable to set variable blocksize\n");
2189                                 goto exit;
2190                         }
2191                 }
2192
2193                 /*
2194                  * Now that we have the current block size,
2195                  * set up some parameters for sastart's usage.
2196                  */
2197                 if (softc->media_blksize) {
2198                         softc->flags |= SA_FLAG_FIXED;
2199                         if (powerof2(softc->media_blksize)) {
2200                                 softc->blk_shift =
2201                                     ffs(softc->media_blksize) - 1;
2202                                 softc->blk_mask = softc->media_blksize - 1;
2203                         } else {
2204                                 softc->blk_mask = ~0;
2205                                 softc->blk_shift = 0;
2206                         }
2207                 } else {
2208                         /*
2209                          * The SCSI-3 spec allows 0 to mean "unspecified".
2210                          * The SCSI-1 spec allows 0 to mean 'infinite'.
2211                          *
2212                          * Either works here.
2213                          */
2214                         if (softc->max_blk == 0) {
2215                                 softc->max_blk = ~0;
2216                         }
2217                         softc->blk_shift = 0;
2218                         if (softc->blk_gran != 0) {
2219                                 softc->blk_mask = softc->blk_gran - 1;
2220                         } else {
2221                                 softc->blk_mask = 0;
2222                         }
2223                 }
2224
2225                 if (write_protect)
2226                         softc->flags |= SA_FLAG_TAPE_WP;
2227
2228                 if (comp_supported) {
2229                         if (softc->saved_comp_algorithm == 0)
2230                                 softc->saved_comp_algorithm =
2231                                     softc->comp_algorithm;
2232                         softc->flags |= SA_FLAG_COMP_SUPP;
2233                         if (comp_enabled)
2234                                 softc->flags |= SA_FLAG_COMP_ENABLED;
2235                 } else
2236                         softc->flags |= SA_FLAG_COMP_UNSUPP;
2237
2238                 if ((softc->buffer_mode == SMH_SA_BUF_MODE_NOBUF) &&
2239                     (softc->quirks & SA_QUIRK_NO_MODESEL) == 0) {
2240                         error = sasetparams(periph, SA_PARAM_BUFF_MODE, 0,
2241                             0, 0, SF_NO_PRINT);
2242                         if (error == 0) {
2243                                 softc->buffer_mode = SMH_SA_BUF_MODE_SIBUF;
2244                         } else {
2245                                 xpt_print(periph->path,
2246                                     "unable to set buffered mode\n");
2247                         }
2248                         error = 0;      /* not an error */
2249                 }
2250
2251
2252                 if (error == 0) {
2253                         softc->flags |= SA_FLAG_TAPE_MOUNTED;
2254                 }
2255 exit:
2256                 if (rblim != NULL)
2257                         kfree(rblim, M_SCSISA);
2258
2259                 if (error != 0) {
2260                         softc->dsreg = MTIO_DSREG_NIL;
2261                 } else {
2262                         softc->fileno = softc->blkno = 0;
2263                         softc->dsreg = MTIO_DSREG_REST;
2264                 }
2265 #ifdef  SA_1FM_AT_EOD
2266                 if ((softc->quirks & SA_QUIRK_2FM) == 0)
2267                         softc->quirks |= SA_QUIRK_1FM;
2268 #else
2269                 if ((softc->quirks & SA_QUIRK_1FM) == 0)
2270                         softc->quirks |= SA_QUIRK_2FM;
2271 #endif
2272         } else
2273                 xpt_release_ccb(ccb);
2274
2275         /*
2276          * If we return an error, we're not mounted any more,
2277          * so release any device reservation.
2278          */
2279         if (error != 0) {
2280                 sareservereleaseunit(periph, FALSE);
2281         } else {
2282                 /*
2283                  * Clear I/O residual.
2284                  */
2285                 softc->last_io_resid = 0;
2286                 softc->last_ctl_resid = 0;
2287         }
2288         return (error);
2289 }
2290
2291 /*
2292  * How many filemarks do we need to write if we were to terminate the
2293  * tape session right now? Note that this can be a negative number
2294  */
2295
2296 static int
2297 samarkswanted(struct cam_periph *periph)
2298 {
2299         int     markswanted;
2300         struct  sa_softc *softc;
2301
2302         softc = (struct sa_softc *)periph->softc;
2303         markswanted = 0;
2304         if ((softc->flags & SA_FLAG_TAPE_WRITTEN) != 0) {
2305                 markswanted++;
2306                 if (softc->quirks & SA_QUIRK_2FM)
2307                         markswanted++;
2308         }
2309         markswanted -= softc->filemarks;
2310         return (markswanted);
2311 }
2312
2313 static int
2314 sacheckeod(struct cam_periph *periph)
2315 {
2316         int     error;
2317         int     markswanted;
2318
2319         markswanted = samarkswanted(periph);
2320
2321         if (markswanted > 0) {
2322                 error = sawritefilemarks(periph, markswanted, FALSE);
2323         } else {
2324                 error = 0;
2325         }
2326         return (error);
2327 }
2328
2329 static int
2330 saerror(union ccb *ccb, u_int32_t cflgs, u_int32_t sflgs)
2331 {
2332         static const char *toobig =
2333             "%d-byte tape record bigger than supplied buffer\n";
2334         struct  cam_periph *periph;
2335         struct  sa_softc *softc;
2336         struct  ccb_scsiio *csio;
2337         struct  scsi_sense_data *sense;
2338         u_int32_t resid = 0;
2339         int32_t info = 0;
2340         cam_status status;
2341         int error_code, sense_key, asc, ascq, error, aqvalid;
2342
2343         periph = xpt_path_periph(ccb->ccb_h.path);
2344         softc = (struct sa_softc *)periph->softc;
2345         csio = &ccb->csio;
2346         sense = &csio->sense_data;
2347         scsi_extract_sense(sense, &error_code, &sense_key, &asc, &ascq);
2348         aqvalid = sense->extra_len >= 6;
2349         error = 0;
2350
2351         status = csio->ccb_h.status & CAM_STATUS_MASK;
2352
2353         /*
2354          * Calculate/latch up, any residuals... We do this in a funny 2-step
2355          * so we can print stuff here if we have CAM_DEBUG enabled for this
2356          * unit.
2357          */
2358         if (status == CAM_SCSI_STATUS_ERROR) {
2359                 if ((sense->error_code & SSD_ERRCODE_VALID) != 0) {
2360                         info = (int32_t) scsi_4btoul(sense->info);
2361                         resid = info;
2362                         if ((softc->flags & SA_FLAG_FIXED) != 0)
2363                                 resid *= softc->media_blksize;
2364                 } else {
2365                         resid = csio->dxfer_len;
2366                         info = resid;
2367                         if ((softc->flags & SA_FLAG_FIXED) != 0) {
2368                                 if (softc->media_blksize)
2369                                         info /= softc->media_blksize;
2370                         }
2371                 }
2372                 if (CCB_Type(csio) == SA_CCB_BUFFER_IO) {
2373                         bcopy((caddr_t) sense, (caddr_t) &softc->last_io_sense,
2374                             sizeof (struct scsi_sense_data));
2375                         bcopy(csio->cdb_io.cdb_bytes, softc->last_io_cdb,
2376                             (int) csio->cdb_len);
2377                         softc->last_io_resid = resid;
2378                         softc->last_resid_was_io = 1;
2379                 } else {
2380                         bcopy((caddr_t) sense, (caddr_t) &softc->last_ctl_sense,
2381                             sizeof (struct scsi_sense_data));
2382                         bcopy(csio->cdb_io.cdb_bytes, softc->last_ctl_cdb,
2383                             (int) csio->cdb_len);
2384                         softc->last_ctl_resid = resid;
2385                         softc->last_resid_was_io = 0;
2386                 }
2387                 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, ("CDB[0]=0x%x Key 0x%x "
2388                     "ASC/ASCQ 0x%x/0x%x CAM STATUS 0x%x flags 0x%x resid %d "
2389                     "dxfer_len %d\n", csio->cdb_io.cdb_bytes[0] & 0xff,
2390                     sense_key, asc, ascq, status,
2391                     sense->flags & ~SSD_KEY_RESERVED, resid, csio->dxfer_len));
2392         } else {
2393                 CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
2394                     ("Cam Status 0x%x\n", status));
2395         }
2396
2397         switch (status) {
2398         case CAM_REQ_CMP:
2399                 return (0);
2400         case CAM_SCSI_STATUS_ERROR:
2401                 /*
2402                  * If a read/write command, we handle it here.
2403                  */
2404                 if (CCB_Type(csio) != SA_CCB_WAITING) {
2405                         break;
2406                 }
2407                 /*
2408                  * If this was just EOM/EOP, Filemark, Setmark or ILI detected
2409                  * on a non read/write command, we assume it's not an error
2410                  * and propagate the residule and return.
2411                  */
2412                 if ((aqvalid && asc == 0 && ascq > 0 && ascq <= 5) ||
2413                     (aqvalid == 0 && sense_key == SSD_KEY_NO_SENSE)) {
2414                         csio->resid = resid;
2415                         QFRLS(ccb);
2416                         return (0);
2417                 }
2418                 /*
2419                  * Otherwise, we let the common code handle this.
2420                  */
2421                 return (cam_periph_error(ccb, cflgs, sflgs, &softc->saved_ccb));
2422
2423         /*
2424          * XXX: To Be Fixed
2425          * We cannot depend upon CAM honoring retry counts for these.
2426          */
2427         case CAM_SCSI_BUS_RESET:
2428         case CAM_BDR_SENT:
2429                 if (ccb->ccb_h.retry_count <= 0) {
2430                         return (EIO);
2431                 }
2432                 /* FALLTHROUGH */
2433         default:
2434                 return (cam_periph_error(ccb, cflgs, sflgs, &softc->saved_ccb));
2435         }
2436
2437         /*
2438          * Handle filemark, end of tape, mismatched record sizes....
2439          * From this point out, we're only handling read/write cases.
2440          * Handle writes && reads differently.
2441          */
2442
2443         if (csio->cdb_io.cdb_bytes[0] == SA_WRITE) {
2444                 if (sense_key == SSD_KEY_VOLUME_OVERFLOW) {
2445                         csio->resid = resid;
2446                         error = ENOSPC;
2447                 } else if (sense->flags & SSD_EOM) {
2448                         softc->flags |= SA_FLAG_EOM_PENDING;
2449                         /*
2450                          * Grotesque as it seems, the few times
2451                          * I've actually seen a non-zero resid,
2452                          * the tape drive actually lied and had
2453                          * written all the data!.
2454                          */
2455                         csio->resid = 0;
2456                 }
2457         } else {
2458                 csio->resid = resid;
2459                 if (sense_key == SSD_KEY_BLANK_CHECK) {
2460                         if (softc->quirks & SA_QUIRK_1FM) {
2461                                 error = 0;
2462                                 softc->flags |= SA_FLAG_EOM_PENDING;
2463                         } else {
2464                                 error = EIO;
2465                         }
2466                 } else if (sense->flags & SSD_FILEMARK) {
2467                         if (softc->flags & SA_FLAG_FIXED) {
2468                                 error = -1;
2469                                 softc->flags |= SA_FLAG_EOF_PENDING;
2470                         }
2471                         /*
2472                          * Unconditionally, if we detected a filemark on a read,
2473                          * mark that we've run moved a file ahead.
2474                          */
2475                         if (softc->fileno != (daddr_t) -1) {
2476                                 softc->fileno++;
2477                                 softc->blkno = 0;
2478                                 csio->ccb_h.ccb_pflags |= SA_POSITION_UPDATED;
2479                         }
2480                 }
2481         }
2482
2483         /*
2484          * Incorrect Length usually applies to read, but can apply to writes.
2485          */
2486         if (error == 0 && (sense->flags & SSD_ILI)) {
2487                 if (info < 0) {
2488                         xpt_print(csio->ccb_h.path, toobig,
2489                             csio->dxfer_len - info);
2490                         csio->resid = csio->dxfer_len;
2491                         error = EIO;
2492                 } else {
2493                         csio->resid = resid;
2494                         if (softc->flags & SA_FLAG_FIXED) {
2495                                 softc->flags |= SA_FLAG_EIO_PENDING;
2496                         }
2497                         /*
2498                          * Bump the block number if we hadn't seen a filemark.
2499                          * Do this independent of errors (we've moved anyway).
2500                          */
2501                         if ((sense->flags & SSD_FILEMARK) == 0) {
2502                                 if (softc->blkno != (daddr_t) -1) {
2503                                         softc->blkno++;
2504                                         csio->ccb_h.ccb_pflags |=
2505                                            SA_POSITION_UPDATED;
2506                                 }
2507                         }
2508                 }
2509         }
2510
2511         if (error <= 0) {
2512                 /*
2513                  * Unfreeze the queue if frozen as we're not returning anything
2514                  * to our waiters that would indicate an I/O error has occurred
2515                  * (yet).
2516                  */
2517                 QFRLS(ccb);
2518                 error = 0;
2519         }
2520         return (error);
2521 }
2522
2523 static int
2524 sagetparams(struct cam_periph *periph, sa_params params_to_get,
2525             u_int32_t *blocksize, u_int8_t *density, u_int32_t *numblocks,
2526             int *buff_mode, u_int8_t *write_protect, u_int8_t *speed,
2527             int *comp_supported, int *comp_enabled, u_int32_t *comp_algorithm,
2528             sa_comp_t *tcs)
2529 {
2530         union ccb *ccb;
2531         void *mode_buffer;
2532         struct scsi_mode_header_6 *mode_hdr;
2533         struct scsi_mode_blk_desc *mode_blk;
2534         int mode_buffer_len;
2535         struct sa_softc *softc;
2536         u_int8_t cpage;
2537         int error;
2538         cam_status status;
2539
2540         softc = (struct sa_softc *)periph->softc;
2541         ccb = cam_periph_getccb(periph, 1);
2542         if (softc->quirks & SA_QUIRK_NO_CPAGE)
2543                 cpage = SA_DEVICE_CONFIGURATION_PAGE;
2544         else
2545                 cpage = SA_DATA_COMPRESSION_PAGE;
2546
2547 retry:
2548         mode_buffer_len = sizeof(*mode_hdr) + sizeof(*mode_blk);
2549
2550         if (params_to_get & SA_PARAM_COMPRESSION) {
2551                 if (softc->quirks & SA_QUIRK_NOCOMP) {
2552                         *comp_supported = FALSE;
2553                         params_to_get &= ~SA_PARAM_COMPRESSION;
2554                 } else
2555                         mode_buffer_len += sizeof (sa_comp_t);
2556         }
2557
2558         mode_buffer = kmalloc(mode_buffer_len, M_SCSISA, M_INTWAIT | M_ZERO);
2559         mode_hdr = (struct scsi_mode_header_6 *)mode_buffer;
2560         mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1];
2561
2562         /* it is safe to retry this */
2563         scsi_mode_sense(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, FALSE,
2564             SMS_PAGE_CTRL_CURRENT, (params_to_get & SA_PARAM_COMPRESSION) ?
2565             cpage : SMS_VENDOR_SPECIFIC_PAGE, mode_buffer, mode_buffer_len,
2566             SSD_FULL_SIZE, SCSIOP_TIMEOUT);
2567
2568         error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
2569             &softc->device_stats);
2570         QFRLS(ccb);
2571
2572         status = ccb->ccb_h.status & CAM_STATUS_MASK;
2573
2574         if (error == EINVAL && (params_to_get & SA_PARAM_COMPRESSION) != 0) {
2575                 /*
2576                  * Hmm. Let's see if we can try another page...
2577                  * If we've already done that, give up on compression
2578                  * for this device and remember this for the future
2579                  * and attempt the request without asking for compression
2580                  * info.
2581                  */
2582                 if (cpage == SA_DATA_COMPRESSION_PAGE) {
2583                         cpage = SA_DEVICE_CONFIGURATION_PAGE;
2584                         goto retry;
2585                 }
2586                 softc->quirks |= SA_QUIRK_NOCOMP;
2587                 kfree(mode_buffer, M_SCSISA);
2588                 goto retry;
2589         } else if (status == CAM_SCSI_STATUS_ERROR) {
2590                 /* Tell the user about the fatal error. */
2591                 scsi_sense_print(&ccb->csio);
2592                 goto sagetparamsexit;
2593         }
2594
2595         /*
2596          * If the user only wants the compression information, and
2597          * the device doesn't send back the block descriptor, it's
2598          * no big deal.  If the user wants more than just
2599          * compression, though, and the device doesn't pass back the
2600          * block descriptor, we need to send another mode sense to
2601          * get the block descriptor.
2602          */
2603         if ((mode_hdr->blk_desc_len == 0) &&
2604             (params_to_get & SA_PARAM_COMPRESSION) &&
2605             (params_to_get & ~(SA_PARAM_COMPRESSION))) {
2606
2607                 /*
2608                  * Decrease the mode buffer length by the size of
2609                  * the compression page, to make sure the data
2610                  * there doesn't get overwritten.
2611                  */
2612                 mode_buffer_len -= sizeof (sa_comp_t);
2613
2614                 /*
2615                  * Now move the compression page that we presumably
2616                  * got back down the memory chunk a little bit so
2617                  * it doesn't get spammed.
2618                  */
2619                 bcopy(&mode_hdr[0], &mode_hdr[1], sizeof (sa_comp_t));
2620                 bzero(&mode_hdr[0], sizeof (mode_hdr[0]));
2621
2622                 /*
2623                  * Now, we issue another mode sense and just ask
2624                  * for the block descriptor, etc.
2625                  */
2626
2627                 scsi_mode_sense(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, FALSE,
2628                     SMS_PAGE_CTRL_CURRENT, SMS_VENDOR_SPECIFIC_PAGE,
2629                     mode_buffer, mode_buffer_len, SSD_FULL_SIZE,
2630                     SCSIOP_TIMEOUT);
2631
2632                 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
2633                     &softc->device_stats);
2634                 QFRLS(ccb);
2635
2636                 if (error != 0)
2637                         goto sagetparamsexit;
2638         }
2639
2640         if (params_to_get & SA_PARAM_BLOCKSIZE)
2641                 *blocksize = scsi_3btoul(mode_blk->blklen);
2642
2643         if (params_to_get & SA_PARAM_NUMBLOCKS)
2644                 *numblocks = scsi_3btoul(mode_blk->nblocks);
2645
2646         if (params_to_get & SA_PARAM_BUFF_MODE)
2647                 *buff_mode = mode_hdr->dev_spec & SMH_SA_BUF_MODE_MASK;
2648
2649         if (params_to_get & SA_PARAM_DENSITY)
2650                 *density = mode_blk->density;
2651
2652         if (params_to_get & SA_PARAM_WP)
2653                 *write_protect = (mode_hdr->dev_spec & SMH_SA_WP)? TRUE : FALSE;
2654
2655         if (params_to_get & SA_PARAM_SPEED)
2656                 *speed = mode_hdr->dev_spec & SMH_SA_SPEED_MASK;
2657
2658         if (params_to_get & SA_PARAM_COMPRESSION) {
2659                 sa_comp_t *ntcs = (sa_comp_t *) &mode_blk[1];
2660                 if (cpage == SA_DATA_COMPRESSION_PAGE) {
2661                         struct scsi_data_compression_page *cp = &ntcs->dcomp;
2662                         *comp_supported =
2663                             (cp->dce_and_dcc & SA_DCP_DCC)? TRUE : FALSE;
2664                         *comp_enabled =
2665                             (cp->dce_and_dcc & SA_DCP_DCE)? TRUE : FALSE;
2666                         *comp_algorithm = scsi_4btoul(cp->comp_algorithm);
2667                 } else {
2668                         struct scsi_dev_conf_page *cp = &ntcs->dconf;
2669                         /*
2670                          * We don't really know whether this device supports
2671                          * Data Compression if the the algorithm field is
2672                          * zero. Just say we do.
2673                          */
2674                         *comp_supported = TRUE;
2675                         *comp_enabled =
2676                             (cp->sel_comp_alg != SA_COMP_NONE)? TRUE : FALSE;
2677                         *comp_algorithm = cp->sel_comp_alg;
2678                 }
2679                 if (tcs != NULL)
2680                         bcopy(ntcs, tcs, sizeof (sa_comp_t));
2681         }
2682
2683         if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
2684                 int idx;
2685                 char *xyz = mode_buffer;
2686                 xpt_print_path(periph->path);
2687                 kprintf("Mode Sense Data=");
2688                 for (idx = 0; idx < mode_buffer_len; idx++)
2689                         kprintf(" 0x%02x", xyz[idx] & 0xff);
2690                 kprintf("\n");
2691         }
2692
2693 sagetparamsexit:
2694
2695         xpt_release_ccb(ccb);
2696         kfree(mode_buffer, M_SCSISA);
2697         return (error);
2698 }
2699
2700 /*
2701  * The purpose of this function is to set one of four different parameters
2702  * for a tape drive:
2703  *      - blocksize
2704  *      - density
2705  *      - compression / compression algorithm
2706  *      - buffering mode
2707  *
2708  * The assumption is that this will be called from saioctl(), and therefore
2709  * from a process context.  Thus the waiting malloc calls below.  If that
2710  * assumption ever changes, the malloc calls should be changed to be
2711  * NOWAIT mallocs.
2712  *
2713  * Any or all of the four parameters may be set when this function is
2714  * called.  It should handle setting more than one parameter at once.
2715  */
2716 static int
2717 sasetparams(struct cam_periph *periph, sa_params params_to_set,
2718             u_int32_t blocksize, u_int8_t density, u_int32_t calg,
2719             u_int32_t sense_flags)
2720 {
2721         struct sa_softc *softc;
2722         u_int32_t current_blocksize = 0;/* silence gcc */
2723         u_int32_t current_calg;
2724         u_int8_t current_density = 0;   /* silence gcc */
2725         u_int8_t current_speed = 0;     /* silence gcc */
2726         int comp_enabled, comp_supported;
2727         void *mode_buffer;
2728         int mode_buffer_len;
2729         struct scsi_mode_header_6 *mode_hdr;
2730         struct scsi_mode_blk_desc *mode_blk;
2731         sa_comp_t *ccomp, *cpage;
2732         int buff_mode;
2733         union ccb *ccb = NULL;
2734         int error;
2735
2736         softc = (struct sa_softc *)periph->softc;
2737
2738         ccomp = kmalloc(sizeof (sa_comp_t), M_SCSISA, M_INTWAIT);
2739
2740         /*
2741          * Since it doesn't make sense to set the number of blocks, or
2742          * write protection, we won't try to get the current value.  We
2743          * always want to get the blocksize, so we can set it back to the
2744          * proper value.
2745          */
2746         error = sagetparams(periph,
2747             params_to_set | SA_PARAM_BLOCKSIZE | SA_PARAM_SPEED,
2748             &current_blocksize, &current_density, NULL, &buff_mode, NULL,
2749             &current_speed, &comp_supported, &comp_enabled,
2750             &current_calg, ccomp);
2751
2752         if (error != 0) {
2753                 kfree(ccomp, M_SCSISA);
2754                 return (error);
2755         }
2756
2757         mode_buffer_len = sizeof(*mode_hdr) + sizeof(*mode_blk);
2758         if (params_to_set & SA_PARAM_COMPRESSION)
2759                 mode_buffer_len += sizeof (sa_comp_t);
2760
2761         mode_buffer = kmalloc(mode_buffer_len, M_SCSISA, M_INTWAIT | M_ZERO);
2762
2763         mode_hdr = (struct scsi_mode_header_6 *)mode_buffer;
2764         mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1];
2765
2766         ccb = cam_periph_getccb(periph, 1);
2767
2768 retry:
2769
2770         if (params_to_set & SA_PARAM_COMPRESSION) {
2771                 if (mode_blk) {
2772                         cpage = (sa_comp_t *)&mode_blk[1];
2773                 } else {
2774                         cpage = (sa_comp_t *)&mode_hdr[1];
2775                 }
2776                 bcopy(ccomp, cpage, sizeof (sa_comp_t));
2777                 cpage->hdr.pagecode &= ~0x80;
2778         } else
2779                 cpage = NULL;
2780
2781         /*
2782          * If the caller wants us to set the blocksize, use the one they
2783          * pass in.  Otherwise, use the blocksize we got back from the
2784          * mode select above.
2785          */
2786         if (mode_blk) {
2787                 if (params_to_set & SA_PARAM_BLOCKSIZE)
2788                         scsi_ulto3b(blocksize, mode_blk->blklen);
2789                 else
2790                         scsi_ulto3b(current_blocksize, mode_blk->blklen);
2791
2792                 /*
2793                  * Set density if requested, else preserve old density.
2794                  * SCSI_SAME_DENSITY only applies to SCSI-2 or better
2795                  * devices, else density we've latched up in our softc.
2796                  */
2797                 if (params_to_set & SA_PARAM_DENSITY) {
2798                         mode_blk->density = density;
2799                 } else if (softc->scsi_rev > SCSI_REV_CCS) {
2800                         mode_blk->density = SCSI_SAME_DENSITY;
2801                 } else {
2802                         mode_blk->density = softc->media_density;
2803                 }
2804         }
2805
2806         /*
2807          * For mode selects, these two fields must be zero.
2808          */
2809         mode_hdr->data_length = 0;
2810         mode_hdr->medium_type = 0;
2811
2812         /* set the speed to the current value */
2813         mode_hdr->dev_spec = current_speed;
2814
2815         /* if set, set single-initiator buffering mode */
2816         if (softc->buffer_mode == SMH_SA_BUF_MODE_SIBUF) {
2817                 mode_hdr->dev_spec |= SMH_SA_BUF_MODE_SIBUF;
2818         }
2819
2820         if (mode_blk)
2821                 mode_hdr->blk_desc_len = sizeof(struct scsi_mode_blk_desc);
2822         else
2823                 mode_hdr->blk_desc_len = 0;
2824
2825         /*
2826          * First, if the user wants us to set the compression algorithm or
2827          * just turn compression on, check to make sure that this drive
2828          * supports compression.
2829          */
2830         if (params_to_set & SA_PARAM_COMPRESSION) {
2831                 /*
2832                  * If the compression algorithm is 0, disable compression.
2833                  * If the compression algorithm is non-zero, enable
2834                  * compression and set the compression type to the
2835                  * specified compression algorithm, unless the algorithm is
2836                  * MT_COMP_ENABLE.  In that case, we look at the
2837                  * compression algorithm that is currently set and if it is
2838                  * non-zero, we leave it as-is.  If it is zero, and we have
2839                  * saved a compression algorithm from a time when
2840                  * compression was enabled before, set the compression to
2841                  * the saved value.
2842                  */
2843                 switch (ccomp->hdr.pagecode & ~0x80) {
2844                 case SA_DEVICE_CONFIGURATION_PAGE:
2845                 {
2846                         struct scsi_dev_conf_page *dcp = &cpage->dconf;
2847                         if (calg == 0) {
2848                                 dcp->sel_comp_alg = SA_COMP_NONE;
2849                                 break;
2850                         }
2851                         if (calg != MT_COMP_ENABLE) {
2852                                 dcp->sel_comp_alg = calg;
2853                         } else if (dcp->sel_comp_alg == SA_COMP_NONE &&
2854                             softc->saved_comp_algorithm != 0) {
2855                                 dcp->sel_comp_alg = softc->saved_comp_algorithm;
2856                         }
2857                         break;
2858                 }
2859                 case SA_DATA_COMPRESSION_PAGE:
2860                 if (ccomp->dcomp.dce_and_dcc & SA_DCP_DCC) {
2861                         struct scsi_data_compression_page *dcp = &cpage->dcomp;
2862                         if (calg == 0) {
2863                                 /*
2864                                  * Disable compression, but leave the
2865                                  * decompression and the capability bit
2866                                  * alone.
2867                                  */
2868                                 dcp->dce_and_dcc = SA_DCP_DCC;
2869                                 dcp->dde_and_red |= SA_DCP_DDE;
2870                                 break;
2871                         }
2872                         /* enable compression && decompression */
2873                         dcp->dce_and_dcc = SA_DCP_DCE | SA_DCP_DCC;
2874                         dcp->dde_and_red |= SA_DCP_DDE;
2875                         /*
2876                          * If there, use compression algorithm from caller.
2877                          * Otherwise, if there's a saved compression algorithm
2878                          * and there is no current algorithm, use the saved
2879                          * algorithm. Else parrot back what we got and hope
2880                          * for the best.
2881                          */
2882                         if (calg != MT_COMP_ENABLE) {
2883                                 scsi_ulto4b(calg, dcp->comp_algorithm);
2884                                 scsi_ulto4b(calg, dcp->decomp_algorithm);
2885                         } else if (scsi_4btoul(dcp->comp_algorithm) == 0 &&
2886                             softc->saved_comp_algorithm != 0) {
2887                                 scsi_ulto4b(softc->saved_comp_algorithm,
2888                                     dcp->comp_algorithm);
2889                                 scsi_ulto4b(softc->saved_comp_algorithm,
2890                                     dcp->decomp_algorithm);
2891                         }
2892                         break;
2893                 }
2894                 /*
2895                  * Compression does not appear to be supported-
2896                  * at least via the DATA COMPRESSION page. It
2897                  * would be too much to ask us to believe that
2898                  * the page itself is supported, but incorrectly
2899                  * reports an ability to manipulate data compression,
2900                  * so we'll assume that this device doesn't support
2901                  * compression. We can just fall through for that.
2902                  */
2903                 /* FALLTHROUGH */
2904                 default:
2905                         /*
2906                          * The drive doesn't seem to support compression,
2907                          * so turn off the set compression bit.
2908                          */
2909                         params_to_set &= ~SA_PARAM_COMPRESSION;
2910                         xpt_print(periph->path,
2911                             "device does not seem to support compression\n");
2912
2913                         /*
2914                          * If that was the only thing the user wanted us to set,
2915                          * clean up allocated resources and return with
2916                          * 'operation not supported'.
2917                          */
2918                         if (params_to_set == SA_PARAM_NONE) {
2919                                 kfree(mode_buffer, M_SCSISA);
2920                                 xpt_release_ccb(ccb);
2921                                 return (ENODEV);
2922                         }
2923
2924                         /*
2925                          * That wasn't the only thing the user wanted us to set.
2926                          * So, decrease the stated mode buffer length by the
2927                          * size of the compression mode page.
2928                          */
2929                         mode_buffer_len -= sizeof(sa_comp_t);
2930                 }
2931         }
2932
2933         /* It is safe to retry this operation */
2934         scsi_mode_select(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG,
2935             (params_to_set & SA_PARAM_COMPRESSION)? TRUE : FALSE,
2936             FALSE, mode_buffer, mode_buffer_len, SSD_FULL_SIZE, SCSIOP_TIMEOUT);
2937
2938         error = cam_periph_runccb(ccb, saerror, 0,
2939             sense_flags, &softc->device_stats);
2940         QFRLS(ccb);
2941
2942         if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
2943                 int idx;
2944                 char *xyz = mode_buffer;
2945                 xpt_print_path(periph->path);
2946                 kprintf("Err%d, Mode Select Data=", error);
2947                 for (idx = 0; idx < mode_buffer_len; idx++)
2948                         kprintf(" 0x%02x", xyz[idx] & 0xff);
2949                 kprintf("\n");
2950         }
2951
2952
2953         if (error) {
2954                 /*
2955                  * If we can, try without setting density/blocksize.
2956                  */
2957                 if (mode_blk) {
2958                         if ((params_to_set &
2959                             (SA_PARAM_DENSITY|SA_PARAM_BLOCKSIZE)) == 0) {
2960                                 mode_blk = NULL;
2961                                 goto retry;
2962                         }
2963                 } else {
2964                         mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1];
2965                         cpage = (sa_comp_t *)&mode_blk[1];
2966                 }
2967
2968                 /*
2969                  * If we were setting the blocksize, and that failed, we
2970                  * want to set it to its original value.  If we weren't
2971                  * setting the blocksize, we don't want to change it.
2972                  */
2973                 scsi_ulto3b(current_blocksize, mode_blk->blklen);
2974
2975                 /*
2976                  * Set density if requested, else preserve old density.
2977                  * SCSI_SAME_DENSITY only applies to SCSI-2 or better
2978                  * devices, else density we've latched up in our softc.
2979                  */
2980                 if (params_to_set & SA_PARAM_DENSITY) {
2981                         mode_blk->density = current_density;
2982                 } else if (softc->scsi_rev > SCSI_REV_CCS) {
2983                         mode_blk->density = SCSI_SAME_DENSITY;
2984                 } else {
2985                         mode_blk->density = softc->media_density;
2986                 }
2987
2988                 if (params_to_set & SA_PARAM_COMPRESSION)
2989                         bcopy(ccomp, cpage, sizeof (sa_comp_t));
2990
2991                 /*
2992                  * The retry count is the only CCB field that might have been
2993                  * changed that we care about, so reset it back to 1.
2994                  */
2995                 ccb->ccb_h.retry_count = 1;
2996                 cam_periph_runccb(ccb, saerror, 0, sense_flags,
2997                     &softc->device_stats);
2998                 QFRLS(ccb);
2999         }
3000
3001         xpt_release_ccb(ccb);
3002
3003         if (ccomp != NULL)
3004                 kfree(ccomp, M_SCSISA);
3005
3006         if (params_to_set & SA_PARAM_COMPRESSION) {
3007                 if (error) {
3008                         softc->flags &= ~SA_FLAG_COMP_ENABLED;
3009                         /*
3010                          * Even if we get an error setting compression,
3011                          * do not say that we don't support it. We could
3012                          * have been wrong, or it may be media specific.
3013                          *      softc->flags &= ~SA_FLAG_COMP_SUPP;
3014                          */
3015                         softc->saved_comp_algorithm = softc->comp_algorithm;
3016                         softc->comp_algorithm = 0;
3017                 } else {
3018                         softc->flags |= SA_FLAG_COMP_ENABLED;
3019                         softc->comp_algorithm = calg;
3020                 }
3021         }
3022
3023         kfree(mode_buffer, M_SCSISA);
3024         return (error);
3025 }
3026
3027 static void
3028 saprevent(struct cam_periph *periph, int action)
3029 {
3030         struct  sa_softc *softc;
3031         union   ccb *ccb;
3032         int     error, sf;
3033
3034         softc = (struct sa_softc *)periph->softc;
3035
3036         if ((action == PR_ALLOW) && (softc->flags & SA_FLAG_TAPE_LOCKED) == 0)
3037                 return;
3038         if ((action == PR_PREVENT) && (softc->flags & SA_FLAG_TAPE_LOCKED) != 0)
3039                 return;
3040
3041         /*
3042          * We can be quiet about illegal requests.
3043          */
3044         if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
3045                 sf = 0;
3046         } else
3047                 sf = SF_QUIET_IR;
3048
3049         ccb = cam_periph_getccb(periph, 1);
3050
3051         /* It is safe to retry this operation */
3052         scsi_prevent(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, action,
3053             SSD_FULL_SIZE, SCSIOP_TIMEOUT);
3054
3055         error = cam_periph_runccb(ccb, saerror, 0, sf, &softc->device_stats);
3056         QFRLS(ccb);
3057         if (error == 0) {
3058                 if (action == PR_ALLOW)
3059                         softc->flags &= ~SA_FLAG_TAPE_LOCKED;
3060                 else
3061                         softc->flags |= SA_FLAG_TAPE_LOCKED;
3062         }
3063
3064         xpt_release_ccb(ccb);
3065 }
3066
3067 static int
3068 sarewind(struct cam_periph *periph)
3069 {
3070         union   ccb *ccb;
3071         struct  sa_softc *softc;
3072         int     error;
3073
3074         softc = (struct sa_softc *)periph->softc;
3075
3076         ccb = cam_periph_getccb(periph, 1);
3077
3078         /* It is safe to retry this operation */
3079         scsi_rewind(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, FALSE,
3080             SSD_FULL_SIZE, REWIND_TIMEOUT);
3081
3082         softc->dsreg = MTIO_DSREG_REW;
3083         error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats);
3084         softc->dsreg = MTIO_DSREG_REST;
3085
3086         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3087                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE);
3088
3089         xpt_release_ccb(ccb);
3090         if (error == 0)
3091                 softc->fileno = softc->blkno = (daddr_t) 0;
3092         else
3093                 softc->fileno = softc->blkno = (daddr_t) -1;
3094         return (error);
3095 }
3096
3097 static int
3098 saspace(struct cam_periph *periph, int count, scsi_space_code code)
3099 {
3100         union   ccb *ccb;
3101         struct  sa_softc *softc;
3102         int     error;
3103
3104         softc = (struct sa_softc *)periph->softc;
3105
3106         ccb = cam_periph_getccb(periph, 1);
3107
3108         /* This cannot be retried */
3109
3110         scsi_space(&ccb->csio, 0, sadone, MSG_SIMPLE_Q_TAG, code, count,
3111             SSD_FULL_SIZE, SPACE_TIMEOUT);
3112
3113         /*
3114          * Clear residual because we will be using it.
3115          */
3116         softc->last_ctl_resid = 0;
3117
3118         softc->dsreg = (count < 0)? MTIO_DSREG_REV : MTIO_DSREG_FWD;
3119         error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats);
3120         softc->dsreg = MTIO_DSREG_REST;
3121
3122         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3123                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE);
3124
3125         xpt_release_ccb(ccb);
3126
3127         /*
3128          * If a spacing operation has failed, we need to invalidate
3129          * this mount.
3130          *
3131          * If the spacing operation was setmarks or to end of recorded data,
3132          * we no longer know our relative position.
3133          *
3134          * If the spacing operations was spacing files in reverse, we
3135          * take account of the residual, but still check against less
3136          * than zero- if we've gone negative, we must have hit BOT.
3137          *
3138          * If the spacing operations was spacing records in reverse and
3139          * we have a residual, we've either hit BOT or hit a filemark.
3140          * In the former case, we know our new record number (0). In
3141          * the latter case, we have absolutely no idea what the real
3142          * record number is- we've stopped between the end of the last
3143          * record in the previous file and the filemark that stopped
3144          * our spacing backwards.
3145          */
3146         if (error) {
3147                 softc->fileno = softc->blkno = (daddr_t) -1;
3148         } else if (code == SS_SETMARKS || code == SS_EOD) {
3149                 softc->fileno = softc->blkno = (daddr_t) -1;
3150         } else if (code == SS_FILEMARKS && softc->fileno != (daddr_t) -1) {
3151                 softc->fileno += (count - softc->last_ctl_resid);
3152                 if (softc->fileno < 0)  /* we must of hit BOT */
3153                         softc->fileno = 0;
3154                 softc->blkno = 0;
3155         } else if (code == SS_BLOCKS && softc->blkno != (daddr_t) -1) {
3156                 softc->blkno += (count - softc->last_ctl_resid);
3157                 if (count < 0) {
3158                         if (softc->last_ctl_resid || softc->blkno < 0) {
3159                                 if (softc->fileno == 0) {
3160                                         softc->blkno = 0;
3161                                 } else {
3162                                         softc->blkno = (daddr_t) -1;
3163                                 }
3164                         }
3165                 }
3166         }
3167         return (error);
3168 }
3169
3170 static int
3171 sawritefilemarks(struct cam_periph *periph, int nmarks, int setmarks)
3172 {
3173         union   ccb *ccb;
3174         struct  sa_softc *softc;
3175         int     error, nwm = 0;
3176
3177         softc = (struct sa_softc *)periph->softc;
3178         if (softc->open_rdonly)
3179                 return (EBADF);
3180
3181         ccb = cam_periph_getccb(periph, 1);
3182         /*
3183          * Clear residual because we will be using it.
3184          */
3185         softc->last_ctl_resid = 0;
3186
3187         softc->dsreg = MTIO_DSREG_FMK;
3188         /* this *must* not be retried */
3189         scsi_write_filemarks(&ccb->csio, 0, sadone, MSG_SIMPLE_Q_TAG,
3190             FALSE, setmarks, nmarks, SSD_FULL_SIZE, IO_TIMEOUT);
3191         softc->dsreg = MTIO_DSREG_REST;
3192
3193
3194         error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats);
3195
3196         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3197                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE);
3198
3199         if (error == 0 && nmarks) {
3200                 struct sa_softc *softc = (struct sa_softc *)periph->softc;
3201                 nwm = nmarks - softc->last_ctl_resid;
3202                 softc->filemarks += nwm;
3203         }
3204
3205         xpt_release_ccb(ccb);
3206
3207         /*
3208          * Update relative positions (if we're doing that).
3209          */
3210         if (error) {
3211                 softc->fileno = softc->blkno = (daddr_t) -1;
3212         } else if (softc->fileno != (daddr_t) -1) {
3213                 softc->fileno += nwm;
3214                 softc->blkno = 0;
3215         }
3216         return (error);
3217 }
3218
3219 static int
3220 sardpos(struct cam_periph *periph, int hard, u_int32_t *blkptr)
3221 {
3222         struct scsi_tape_position_data loc;
3223         union ccb *ccb;
3224         struct sa_softc *softc = (struct sa_softc *)periph->softc;
3225         int error;
3226
3227         /*
3228          * We try and flush any buffered writes here if we were writing
3229          * and we're trying to get hardware block position. It eats
3230          * up performance substantially, but I'm wary of drive firmware.
3231          *
3232          * I think that *logical* block position is probably okay-
3233          * but hardware block position might have to wait for data
3234          * to hit media to be valid. Caveat Emptor.
3235          */
3236
3237         if (hard && (softc->flags & SA_FLAG_TAPE_WRITTEN)) {
3238                 error = sawritefilemarks(periph, 0, 0);
3239                 if (error && error != EACCES)
3240                         return (error);
3241         }
3242
3243         ccb = cam_periph_getccb(periph, 1);
3244         scsi_read_position(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG,
3245             hard, &loc, SSD_FULL_SIZE, SCSIOP_TIMEOUT);
3246         softc->dsreg = MTIO_DSREG_RBSY;
3247         error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats);
3248         softc->dsreg = MTIO_DSREG_REST;
3249         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3250                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, 0);
3251
3252         if (error == 0) {
3253                 if (loc.flags & SA_RPOS_UNCERTAIN) {
3254                         error = EINVAL;         /* nothing is certain */
3255                 } else {
3256                         *blkptr = scsi_4btoul(loc.firstblk);
3257                 }
3258         }
3259
3260         xpt_release_ccb(ccb);
3261         return (error);
3262 }
3263
3264 static int
3265 sasetpos(struct cam_periph *periph, int hard, u_int32_t *blkptr)
3266 {
3267         union ccb *ccb;
3268         struct sa_softc *softc;
3269         int error;
3270
3271         /*
3272          * We used to try and flush any buffered writes here.
3273          * Now we push this onto user applications to either
3274          * flush the pending writes themselves (via a zero count
3275          * WRITE FILEMARKS command) or they can trust their tape
3276          * drive to do this correctly for them.
3277          */
3278
3279         softc = (struct sa_softc *)periph->softc;
3280         ccb = cam_periph_getccb(periph, 1);
3281
3282
3283         scsi_set_position(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG,
3284             hard, *blkptr, SSD_FULL_SIZE, SPACE_TIMEOUT);
3285
3286
3287         softc->dsreg = MTIO_DSREG_POS;
3288         error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats);
3289         softc->dsreg = MTIO_DSREG_REST;
3290         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3291                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, 0);
3292         xpt_release_ccb(ccb);
3293         /*
3294          * Note relative file && block number position as now unknown.
3295          */
3296         softc->fileno = softc->blkno = (daddr_t) -1;
3297         return (error);
3298 }
3299
3300 static int
3301 saretension(struct cam_periph *periph)
3302 {
3303         union ccb *ccb;
3304         struct sa_softc *softc;
3305         int error;
3306
3307         softc = (struct sa_softc *)periph->softc;
3308
3309         ccb = cam_periph_getccb(periph, 1);
3310
3311         /* It is safe to retry this operation */
3312         scsi_load_unload(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, FALSE,
3313             FALSE, TRUE,  TRUE, SSD_FULL_SIZE, ERASE_TIMEOUT);
3314
3315         softc->dsreg = MTIO_DSREG_TEN;
3316         error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats);
3317         softc->dsreg = MTIO_DSREG_REST;
3318
3319         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3320                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE);
3321         xpt_release_ccb(ccb);
3322         if (error == 0)
3323                 softc->fileno = softc->blkno = (daddr_t) 0;
3324         else
3325                 softc->fileno = softc->blkno = (daddr_t) -1;
3326         return (error);
3327 }
3328
3329 static int
3330 sareservereleaseunit(struct cam_periph *periph, int reserve)
3331 {
3332         union ccb *ccb;
3333         struct sa_softc *softc;
3334         int error;
3335
3336         softc = (struct sa_softc *)periph->softc;
3337         ccb = cam_periph_getccb(periph,  1);
3338
3339         /* It is safe to retry this operation */
3340         scsi_reserve_release_unit(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG,
3341             FALSE,  0, SSD_FULL_SIZE,  SCSIOP_TIMEOUT, reserve);
3342         softc->dsreg = MTIO_DSREG_RBSY;
3343         error = cam_periph_runccb(ccb, saerror, 0,
3344             SF_RETRY_UA | SF_NO_PRINT, &softc->device_stats);
3345         softc->dsreg = MTIO_DSREG_REST;
3346         QFRLS(ccb);
3347         xpt_release_ccb(ccb);
3348
3349         /*
3350          * If the error was Illegal Request, then the device doesn't support
3351          * RESERVE/RELEASE. This is not an error.
3352          */
3353         if (error == EINVAL) {
3354                 error = 0;
3355         }
3356
3357         return (error);
3358 }
3359
3360 static int
3361 saloadunload(struct cam_periph *periph, int load)
3362 {
3363         union   ccb *ccb;
3364         struct  sa_softc *softc;
3365         int     error;
3366
3367         softc = (struct sa_softc *)periph->softc;
3368
3369         ccb = cam_periph_getccb(periph, 1);
3370
3371         /* It is safe to retry this operation */
3372         scsi_load_unload(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, FALSE,
3373             FALSE, FALSE, load, SSD_FULL_SIZE, REWIND_TIMEOUT);
3374
3375         softc->dsreg = (load)? MTIO_DSREG_LD : MTIO_DSREG_UNL;
3376         error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats);
3377         softc->dsreg = MTIO_DSREG_REST;
3378         QFRLS(ccb);
3379         xpt_release_ccb(ccb);
3380
3381         if (error || load == 0)
3382                 softc->fileno = softc->blkno = (daddr_t) -1;
3383         else if (error == 0)
3384                 softc->fileno = softc->blkno = (daddr_t) 0;
3385         return (error);
3386 }
3387
3388 static int
3389 saerase(struct cam_periph *periph, int longerase)
3390 {
3391
3392         union   ccb *ccb;
3393         struct  sa_softc *softc;
3394         int error;
3395
3396         softc = (struct sa_softc *)periph->softc;
3397         if (softc->open_rdonly)
3398                 return (EBADF);
3399
3400         ccb = cam_periph_getccb(periph, 1);
3401
3402         scsi_erase(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG, FALSE, longerase,
3403             SSD_FULL_SIZE, ERASE_TIMEOUT);
3404
3405         softc->dsreg = MTIO_DSREG_ZER;
3406         error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats);
3407         softc->dsreg = MTIO_DSREG_REST;
3408
3409         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3410                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE);
3411         xpt_release_ccb(ccb);
3412         return (error);
3413 }
3414
3415 #endif /* _KERNEL */
3416
3417 /*
3418  * Read tape block limits command.
3419  */
3420 void
3421 scsi_read_block_limits(struct ccb_scsiio *csio, u_int32_t retries,
3422                    void (*cbfcnp)(struct cam_periph *, union ccb *),
3423                    u_int8_t tag_action,
3424                    struct scsi_read_block_limits_data *rlimit_buf,
3425                    u_int8_t sense_len, u_int32_t timeout)
3426 {
3427         struct scsi_read_block_limits *scsi_cmd;
3428
3429         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_IN, tag_action,
3430              (u_int8_t *)rlimit_buf, sizeof(*rlimit_buf), sense_len,
3431              sizeof(*scsi_cmd), timeout);
3432
3433         scsi_cmd = (struct scsi_read_block_limits *)&csio->cdb_io.cdb_bytes;
3434         bzero(scsi_cmd, sizeof(*scsi_cmd));
3435         scsi_cmd->opcode = READ_BLOCK_LIMITS;
3436 }
3437
3438 void
3439 scsi_sa_read_write(struct ccb_scsiio *csio, u_int32_t retries,
3440                    void (*cbfcnp)(struct cam_periph *, union ccb *),
3441                    u_int8_t tag_action, int readop, int sli,
3442                    int fixed, u_int32_t length, u_int8_t *data_ptr,
3443                    u_int32_t dxfer_len, u_int8_t sense_len, u_int32_t timeout)
3444 {
3445         struct scsi_sa_rw *scsi_cmd;
3446
3447         scsi_cmd = (struct scsi_sa_rw *)&csio->cdb_io.cdb_bytes;
3448         scsi_cmd->opcode = readop ? SA_READ : SA_WRITE;
3449         scsi_cmd->sli_fixed = 0;
3450         if (sli && readop)
3451                 scsi_cmd->sli_fixed |= SAR_SLI;
3452         if (fixed)
3453                 scsi_cmd->sli_fixed |= SARW_FIXED;
3454         scsi_ulto3b(length, scsi_cmd->length);
3455         scsi_cmd->control = 0;
3456
3457         cam_fill_csio(csio, retries, cbfcnp, readop ? CAM_DIR_IN : CAM_DIR_OUT,
3458             tag_action, data_ptr, dxfer_len, sense_len,
3459             sizeof(*scsi_cmd), timeout);
3460 }
3461
3462 void
3463 scsi_load_unload(struct ccb_scsiio *csio, u_int32_t retries,
3464                  void (*cbfcnp)(struct cam_periph *, union ccb *),
3465                  u_int8_t tag_action, int immediate, int eot,
3466                  int reten, int load, u_int8_t sense_len,
3467                  u_int32_t timeout)
3468 {
3469         struct scsi_load_unload *scsi_cmd;
3470
3471         scsi_cmd = (struct scsi_load_unload *)&csio->cdb_io.cdb_bytes;
3472         bzero(scsi_cmd, sizeof(*scsi_cmd));
3473         scsi_cmd->opcode = LOAD_UNLOAD;
3474         if (immediate)
3475                 scsi_cmd->immediate = SLU_IMMED;
3476         if (eot)
3477                 scsi_cmd->eot_reten_load |= SLU_EOT;
3478         if (reten)
3479                 scsi_cmd->eot_reten_load |= SLU_RETEN;
3480         if (load)
3481                 scsi_cmd->eot_reten_load |= SLU_LOAD;
3482
3483         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action,
3484             NULL, 0, sense_len, sizeof(*scsi_cmd), timeout);
3485 }
3486
3487 void
3488 scsi_rewind(struct ccb_scsiio *csio, u_int32_t retries,
3489             void (*cbfcnp)(struct cam_periph *, union ccb *),
3490             u_int8_t tag_action, int immediate, u_int8_t sense_len,
3491             u_int32_t timeout)
3492 {
3493         struct scsi_rewind *scsi_cmd;
3494
3495         scsi_cmd = (struct scsi_rewind *)&csio->cdb_io.cdb_bytes;
3496         bzero(scsi_cmd, sizeof(*scsi_cmd));
3497         scsi_cmd->opcode = REWIND;
3498         if (immediate)
3499                 scsi_cmd->immediate = SREW_IMMED;
3500
3501         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
3502             0, sense_len, sizeof(*scsi_cmd), timeout);
3503 }
3504
3505 void
3506 scsi_space(struct ccb_scsiio *csio, u_int32_t retries,
3507            void (*cbfcnp)(struct cam_periph *, union ccb *),
3508            u_int8_t tag_action, scsi_space_code code,
3509            u_int32_t count, u_int8_t sense_len, u_int32_t timeout)
3510 {
3511         struct scsi_space *scsi_cmd;
3512
3513         scsi_cmd = (struct scsi_space *)&csio->cdb_io.cdb_bytes;
3514         scsi_cmd->opcode = SPACE;
3515         scsi_cmd->code = code;
3516         scsi_ulto3b(count, scsi_cmd->count);
3517         scsi_cmd->control = 0;
3518
3519         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
3520             0, sense_len, sizeof(*scsi_cmd), timeout);
3521 }
3522
3523 void
3524 scsi_write_filemarks(struct ccb_scsiio *csio, u_int32_t retries,
3525                      void (*cbfcnp)(struct cam_periph *, union ccb *),
3526                      u_int8_t tag_action, int immediate, int setmark,
3527                      u_int32_t num_marks, u_int8_t sense_len,
3528                      u_int32_t timeout)
3529 {
3530         struct scsi_write_filemarks *scsi_cmd;
3531
3532         scsi_cmd = (struct scsi_write_filemarks *)&csio->cdb_io.cdb_bytes;
3533         bzero(scsi_cmd, sizeof(*scsi_cmd));
3534         scsi_cmd->opcode = WRITE_FILEMARKS;
3535         if (immediate)
3536                 scsi_cmd->byte2 |= SWFMRK_IMMED;
3537         if (setmark)
3538                 scsi_cmd->byte2 |= SWFMRK_WSMK;
3539
3540         scsi_ulto3b(num_marks, scsi_cmd->num_marks);
3541
3542         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
3543             0, sense_len, sizeof(*scsi_cmd), timeout);
3544 }
3545
3546 /*
3547  * The reserve and release unit commands differ only by their opcodes.
3548  */
3549 void
3550 scsi_reserve_release_unit(struct ccb_scsiio *csio, u_int32_t retries,
3551                           void (*cbfcnp)(struct cam_periph *, union ccb *),
3552                           u_int8_t tag_action, int third_party,
3553                           int third_party_id, u_int8_t sense_len,
3554                           u_int32_t timeout, int reserve)
3555 {
3556         struct scsi_reserve_release_unit *scsi_cmd;
3557
3558         scsi_cmd = (struct scsi_reserve_release_unit *)&csio->cdb_io.cdb_bytes;
3559         bzero(scsi_cmd, sizeof(*scsi_cmd));
3560
3561         if (reserve)
3562                 scsi_cmd->opcode = RESERVE_UNIT;
3563         else
3564                 scsi_cmd->opcode = RELEASE_UNIT;
3565
3566         if (third_party) {
3567                 scsi_cmd->lun_thirdparty |= SRRU_3RD_PARTY;
3568                 scsi_cmd->lun_thirdparty |=
3569                         ((third_party_id << SRRU_3RD_SHAMT) & SRRU_3RD_MASK);
3570         }
3571
3572         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
3573             0, sense_len, sizeof(*scsi_cmd), timeout);
3574 }
3575
3576 void
3577 scsi_erase(struct ccb_scsiio *csio, u_int32_t retries,
3578            void (*cbfcnp)(struct cam_periph *, union ccb *),
3579            u_int8_t tag_action, int immediate, int long_erase,
3580            u_int8_t sense_len, u_int32_t timeout)
3581 {
3582         struct scsi_erase *scsi_cmd;
3583
3584         scsi_cmd = (struct scsi_erase *)&csio->cdb_io.cdb_bytes;
3585         bzero(scsi_cmd, sizeof(*scsi_cmd));
3586
3587         scsi_cmd->opcode = ERASE;
3588
3589         if (immediate)
3590                 scsi_cmd->lun_imm_long |= SE_IMMED;
3591
3592         if (long_erase)
3593                 scsi_cmd->lun_imm_long |= SE_LONG;
3594
3595         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
3596             0, sense_len, sizeof(*scsi_cmd), timeout);
3597 }
3598
3599 /*
3600  * Read Tape Position command.
3601  */
3602 void
3603 scsi_read_position(struct ccb_scsiio *csio, u_int32_t retries,
3604                    void (*cbfcnp)(struct cam_periph *, union ccb *),
3605                    u_int8_t tag_action, int hardsoft,
3606                    struct scsi_tape_position_data *sbp,
3607                    u_int8_t sense_len, u_int32_t timeout)
3608 {
3609         struct scsi_tape_read_position *scmd;
3610
3611         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_IN, tag_action,
3612             (u_int8_t *)sbp, sizeof (*sbp), sense_len, sizeof(*scmd), timeout);
3613         scmd = (struct scsi_tape_read_position *)&csio->cdb_io.cdb_bytes;
3614         bzero(scmd, sizeof(*scmd));
3615         scmd->opcode = READ_POSITION;
3616         scmd->byte1 = hardsoft;
3617 }
3618
3619 /*
3620  * Set Tape Position command.
3621  */
3622 void
3623 scsi_set_position(struct ccb_scsiio *csio, u_int32_t retries,
3624                    void (*cbfcnp)(struct cam_periph *, union ccb *),
3625                    u_int8_t tag_action, int hardsoft, u_int32_t blkno,
3626                    u_int8_t sense_len, u_int32_t timeout)
3627 {
3628         struct scsi_tape_locate *scmd;
3629
3630         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action,
3631             NULL, 0, sense_len, sizeof(*scmd), timeout);
3632         scmd = (struct scsi_tape_locate *)&csio->cdb_io.cdb_bytes;
3633         bzero(scmd, sizeof(*scmd));
3634         scmd->opcode = LOCATE;
3635         if (hardsoft)
3636                 scmd->byte1 |= SA_SPOS_BT;
3637         scsi_ulto4b(blkno, scmd->blkaddr);
3638 }