sys/bus/cam/scsi/scsi_sa.c

   1 /*
   2  * $FreeBSD: src/sys/cam/scsi/scsi_sa.c,v 1.45.2.13 2002/12/17 17:08:50 trhodes Exp $
   3  * $DragonFly: src/sys/bus/cam/scsi/scsi_sa.c,v 1.6 2003/07/21 05:50:24 dillon Exp $
   4  *
   5  * Implementation of SCSI Sequential Access Peripheral driver for CAM.
   6  *
   7  * Copyright (c) 1999, 2000 Matthew Jacob
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions, and the following disclaimer,
  15  *    without modification, immediately at the beginning of the file.
  16  * 2. The name of the author may not be used to endorse or promote products
  17  *    derived from this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  23  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  */
  32
  33 #include <sys/param.h>
  34 #include <sys/queue.h>
  35 #ifdef _KERNEL
  36 #include <sys/systm.h>
  37 #include <sys/kernel.h>
  38 #endif
  39 #include <sys/types.h>
  40 #include <sys/buf.h>
  41 #include <sys/malloc.h>
  42 #include <sys/mtio.h>
  43 #include <sys/conf.h>
  44 #include <sys/proc.h>
  45 #include <sys/buf2.h>
  46 #include <sys/devicestat.h>
  47 #include <machine/limits.h>
  48
  49 #ifndef _KERNEL
  50 #include <stdio.h>
  51 #include <string.h>
  52 #endif
  53
  54 #include <cam/cam.h>
  55 #include <cam/cam_ccb.h>
  56 #include <cam/cam_extend.h>
  57 #include <cam/cam_periph.h>
  58 #include <cam/cam_xpt_periph.h>
  59 #include <cam/cam_debug.h>
  60
  61 #include <cam/scsi/scsi_all.h>
  62 #include <cam/scsi/scsi_message.h>
  63 #include <cam/scsi/scsi_sa.h>
  64
  65 #ifdef _KERNEL
  66
  67 #include <opt_sa.h>
  68
  69 #ifndef SA_IO_TIMEOUT
  70 #define SA_IO_TIMEOUT           4
  71 #endif
  72 #ifndef SA_SPACE_TIMEOUT
  73 #define SA_SPACE_TIMEOUT        1 * 60
  74 #endif
  75 #ifndef SA_REWIND_TIMEOUT
  76 #define SA_REWIND_TIMEOUT       2 * 60
  77 #endif
  78 #ifndef SA_ERASE_TIMEOUT
  79 #define SA_ERASE_TIMEOUT        4 * 60
  80 #endif
  81
  82 #define SCSIOP_TIMEOUT          (60 * 1000)     /* not an option */
  83
  84 #define IO_TIMEOUT              (SA_IO_TIMEOUT * 60 * 1000)
  85 #define REWIND_TIMEOUT          (SA_REWIND_TIMEOUT * 60 * 1000)
  86 #define ERASE_TIMEOUT           (SA_ERASE_TIMEOUT * 60 * 1000)
  87 #define SPACE_TIMEOUT           (SA_SPACE_TIMEOUT * 60 * 1000)
  88
  89 /*
  90  * Additional options that can be set for config: SA_1FM_AT_EOT
  91  */
  92
  93 #ifndef UNUSED_PARAMETER
  94 #define UNUSED_PARAMETER(x)     x = x
  95 #endif
  96
  97 #define QFRLS(ccb)      \
  98         if (((ccb)->ccb_h.status & CAM_DEV_QFRZN) != 0) \
  99                 cam_release_devq((ccb)->ccb_h.path, 0, 0, 0, FALSE)
 100
 101 /*
 102  * Driver states
 103  */
 104
 105
 106 typedef enum {
 107         SA_STATE_NORMAL, SA_STATE_ABNORMAL
 108 } sa_state;
 109
 110 #define ccb_pflags      ppriv_field0
 111 #define ccb_bp          ppriv_ptr1
 112
 113 #define SA_CCB_BUFFER_IO        0x0
 114 #define SA_CCB_WAITING          0x1
 115 #define SA_CCB_TYPEMASK         0x1
 116 #define SA_POSITION_UPDATED     0x2
 117
 118 #define Set_CCB_Type(x, type)                           \
 119         x->ccb_h.ccb_pflags &= ~SA_CCB_TYPEMASK;        \
 120         x->ccb_h.ccb_pflags |= type
 121
 122 #define CCB_Type(x)     (x->ccb_h.ccb_pflags & SA_CCB_TYPEMASK)
 123
 124
 125
 126 typedef enum {
 127         SA_FLAG_OPEN            = 0x0001,
 128         SA_FLAG_FIXED           = 0x0002,
 129         SA_FLAG_TAPE_LOCKED     = 0x0004,
 130         SA_FLAG_TAPE_MOUNTED    = 0x0008,
 131         SA_FLAG_TAPE_WP         = 0x0010,
 132         SA_FLAG_TAPE_WRITTEN    = 0x0020,
 133         SA_FLAG_EOM_PENDING     = 0x0040,
 134         SA_FLAG_EIO_PENDING     = 0x0080,
 135         SA_FLAG_EOF_PENDING     = 0x0100,
 136         SA_FLAG_ERR_PENDING     = (SA_FLAG_EOM_PENDING|SA_FLAG_EIO_PENDING|
 137                                    SA_FLAG_EOF_PENDING),
 138         SA_FLAG_INVALID         = 0x0200,
 139         SA_FLAG_COMP_ENABLED    = 0x0400,
 140         SA_FLAG_COMP_SUPP       = 0x0800,
 141         SA_FLAG_COMP_UNSUPP     = 0x1000,
 142         SA_FLAG_TAPE_FROZEN     = 0x2000
 143 } sa_flags;
 144
 145 typedef enum {
 146         SA_MODE_REWIND          = 0x00,
 147         SA_MODE_NOREWIND        = 0x01,
 148         SA_MODE_OFFLINE         = 0x02
 149 } sa_mode;
 150
 151 typedef enum {
 152         SA_PARAM_NONE           = 0x00,
 153         SA_PARAM_BLOCKSIZE      = 0x01,
 154         SA_PARAM_DENSITY        = 0x02,
 155         SA_PARAM_COMPRESSION    = 0x04,
 156         SA_PARAM_BUFF_MODE      = 0x08,
 157         SA_PARAM_NUMBLOCKS      = 0x10,
 158         SA_PARAM_WP             = 0x20,
 159         SA_PARAM_SPEED          = 0x40,
 160         SA_PARAM_ALL            = 0x7f
 161 } sa_params;
 162
 163 typedef enum {
 164         SA_QUIRK_NONE           = 0x00,
 165         SA_QUIRK_NOCOMP         = 0x01, /* Can't deal with compression at all */
 166         SA_QUIRK_FIXED          = 0x02, /* Force fixed mode */
 167         SA_QUIRK_VARIABLE       = 0x04, /* Force variable mode */
 168         SA_QUIRK_2FM            = 0x08, /* Needs Two File Marks at EOD */
 169         SA_QUIRK_1FM            = 0x10, /* No more than 1 File Mark at EOD */
 170         SA_QUIRK_NODREAD        = 0x20, /* Don't try and dummy read density */
 171         SA_QUIRK_NO_MODESEL     = 0x40, /* Don't do mode select at all */
 172         SA_QUIRK_NO_CPAGE       = 0x80  /* Don't use DEVICE COMPRESSION page */
 173 } sa_quirks;
 174
 175 /* units are bits 4-7, 16-21 (1024 units) */
 176 #define SAUNIT(DEV) \
 177         (((minor(DEV) & 0xF0) >> 4) |  ((minor(DEV) & 0x3f0000) >> 16))
 178
 179 #define SAMODE(z) ((minor(z) & 0x3))
 180 #define SADENSITY(z) (((minor(z) >> 2) & 0x3))
 181 #define SA_IS_CTRL(z) (minor(z) & (1 << 29))
 182
 183 #define SA_NOT_CTLDEV   0
 184 #define SA_CTLDEV       1
 185
 186 #define SA_ATYPE_R      0
 187 #define SA_ATYPE_NR     1
 188 #define SA_ATYPE_ER     2
 189
 190 #define SAMINOR(ctl, unit, mode, access) \
 191         ((ctl << 29) | ((unit & 0x3f0) << 16) | ((unit & 0xf) << 4) | \
 192         (mode << 0x2) | (access & 0x3))
 193
 194 #define SA_NUM_MODES    4
 195 struct sa_devs {
 196         dev_t   ctl_dev;
 197         struct sa_mode_devs {
 198                 dev_t   r_dev;
 199                 dev_t   nr_dev;
 200                 dev_t   er_dev;
 201         } mode_devs[SA_NUM_MODES];
 202         dev_t   r_dev;
 203         dev_t   nr_dev;
 204         dev_t   er_dev;
 205 };
 206
 207 struct sa_softc {
 208         sa_state        state;
 209         sa_flags        flags;
 210         sa_quirks       quirks;
 211         struct          buf_queue_head buf_queue;
 212         int             queue_count;
 213         struct          devstat device_stats;
 214         struct sa_devs  devs;
 215         int             blk_gran;
 216         int             blk_mask;
 217         int             blk_shift;
 218         u_int32_t       max_blk;
 219         u_int32_t       min_blk;
 220         u_int32_t       comp_algorithm;
 221         u_int32_t       saved_comp_algorithm;
 222         u_int32_t       media_blksize;
 223         u_int32_t       last_media_blksize;
 224         u_int32_t       media_numblks;
 225         u_int8_t        media_density;
 226         u_int8_t        speed;
 227         u_int8_t        scsi_rev;
 228         u_int8_t        dsreg;          /* mtio mt_dsreg, redux */
 229         int             buffer_mode;
 230         int             filemarks;
 231         union           ccb saved_ccb;
 232         int             last_resid_was_io;
 233
 234         /*
 235          * Relative to BOT Location.
 236          */
 237         daddr_t         fileno;
 238         daddr_t         blkno;
 239
 240         /*
 241          * Latched Error Info
 242          */
 243         struct {
 244                 struct scsi_sense_data _last_io_sense;
 245                 u_int32_t _last_io_resid;
 246                 u_int8_t _last_io_cdb[CAM_MAX_CDBLEN];
 247                 struct scsi_sense_data _last_ctl_sense;
 248                 u_int32_t _last_ctl_resid;
 249                 u_int8_t _last_ctl_cdb[CAM_MAX_CDBLEN];
 250 #define last_io_sense   errinfo._last_io_sense
 251 #define last_io_resid   errinfo._last_io_resid
 252 #define last_io_cdb     errinfo._last_io_cdb
 253 #define last_ctl_sense  errinfo._last_ctl_sense
 254 #define last_ctl_resid  errinfo._last_ctl_resid
 255 #define last_ctl_cdb    errinfo._last_ctl_cdb
 256         } errinfo;
 257         /*
 258          * Misc other flags/state
 259          */
 260         u_int32_t
 261                                 : 31,
 262                 ctrl_mode       : 1;    /* control device open */
 263 };
 264
 265 struct sa_quirk_entry {
 266         struct scsi_inquiry_pattern inq_pat;    /* matching pattern */
 267         sa_quirks quirks;       /* specific quirk type */
 268         u_int32_t prefblk;      /* preferred blocksize when in fixed mode */
 269 };
 270
 271 static struct sa_quirk_entry sa_quirk_table[] =
 272 {
 273         {
 274                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "OnStream",
 275                   "ADR*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_NODREAD |
 276                    SA_QUIRK_1FM|SA_QUIRK_NO_MODESEL, 32768
 277         },
 278         {
 279                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
 280                   "Python 06408*", "*"}, SA_QUIRK_NODREAD, 0
 281         },
 282         {
 283                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
 284                   "Python 25601*", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_NODREAD, 0
 285         },
 286         {
 287                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
 288                   "Python*", "*"}, SA_QUIRK_NODREAD, 0
 289         },
 290         {
 291                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
 292                   "VIPER 150*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512
 293         },
 294         {
 295                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
 296                   "VIPER 2525 25462", "-011"},
 297                   SA_QUIRK_NOCOMP|SA_QUIRK_1FM|SA_QUIRK_NODREAD, 0
 298         },
 299         {
 300                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
 301                   "VIPER 2525*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 1024
 302         },
 303 #if     0
 304         {
 305                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
 306                   "C15*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_NO_CPAGE, 0,
 307         },
 308 #endif
 309         {
 310                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
 311                   "C56*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0
 312         },
 313         {
 314                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
 315                   "T20*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512
 316         },
 317         {
 318                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
 319                   "T4000*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512
 320         },
 321         {
 322                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
 323                   "HP-88780*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0
 324         },
 325         {
 326                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "KENNEDY",
 327                   "*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0
 328         },
 329         {
 330                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "M4 DATA",
 331                   "123107 SCSI*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0
 332         },
 333         {       /* jreynold@primenet.com */
 334                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "Seagate",
 335                 "STT8000N*", "*"}, SA_QUIRK_1FM, 0
 336         },
 337         {       /* mike@sentex.net */
 338                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "Seagate",
 339                 "STT20000*", "*"}, SA_QUIRK_1FM, 0
 340         },
 341         {
 342                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
 343                   " TDC 3600", "U07:"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512
 344         },
 345         {
 346                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
 347                   " TDC 3800", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512
 348         },
 349         {
 350                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
 351                   " TDC 4100", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512
 352         },
 353         {
 354                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
 355                   " TDC 4200", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512
 356         },
 357         {
 358                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
 359                   " SLR*", "*"}, SA_QUIRK_1FM, 0
 360         },
 361         {
 362                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "WANGTEK",
 363                   "5525ES*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512
 364         },
 365         {
 366                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "WANGTEK",
 367                   "51000*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 1024
 368         }
 369 };
 370
 371 static  d_open_t        saopen;
 372 static  d_close_t       saclose;
 373 static  d_strategy_t    sastrategy;
 374 static  d_ioctl_t       saioctl;
 375 static  periph_init_t   sainit;
 376 static  periph_ctor_t   saregister;
 377 static  periph_oninv_t  saoninvalidate;
 378 static  periph_dtor_t   sacleanup;
 379 static  periph_start_t  sastart;
 380 static  void            saasync(void *callback_arg, u_int32_t code,
 381                                 struct cam_path *path, void *arg);
 382 static  void            sadone(struct cam_periph *periph,
 383                                union ccb *start_ccb);
 384 static  int             saerror(union ccb *ccb, u_int32_t cam_flags,
 385                                 u_int32_t sense_flags);
 386 static int              samarkswanted(struct cam_periph *);
 387 static int              sacheckeod(struct cam_periph *periph);
 388 static int              sagetparams(struct cam_periph *periph,
 389                                     sa_params params_to_get,
 390                                     u_int32_t *blocksize, u_int8_t *density,
 391                                     u_int32_t *numblocks, int *buff_mode,
 392                                     u_int8_t *write_protect, u_int8_t *speed,
 393                                     int *comp_supported, int *comp_enabled,
 394                                     u_int32_t *comp_algorithm,
 395                                     sa_comp_t *comp_page);
 396 static int              sasetparams(struct cam_periph *periph,
 397                                     sa_params params_to_set,
 398                                     u_int32_t blocksize, u_int8_t density,
 399                                     u_int32_t comp_algorithm,
 400                                     u_int32_t sense_flags);
 401 static void             saprevent(struct cam_periph *periph, int action);
 402 static int              sarewind(struct cam_periph *periph);
 403 static int              saspace(struct cam_periph *periph, int count,
 404                                 scsi_space_code code);
 405 static int              samount(struct cam_periph *, int, dev_t);
 406 static int              saretension(struct cam_periph *periph);
 407 static int              sareservereleaseunit(struct cam_periph *periph,
 408                                              int reserve);
 409 static int              saloadunload(struct cam_periph *periph, int load);
 410 static int              saerase(struct cam_periph *periph, int longerase);
 411 static int              sawritefilemarks(struct cam_periph *periph,
 412                                          int nmarks, int setmarks);
 413 static int              sardpos(struct cam_periph *periph, int, u_int32_t *);
 414 static int              sasetpos(struct cam_periph *periph, int, u_int32_t *);
 415
 416
 417 static struct periph_driver sadriver =
 418 {
 419         sainit, "sa",
 420         TAILQ_HEAD_INITIALIZER(sadriver.units), /* generation */ 0
 421 };
 422
 423 DATA_SET(periphdriver_set, sadriver);
 424
 425 /* For 2.2-stable support */
 426 #ifndef D_TAPE
 427 #define D_TAPE 0
 428 #endif
 429
 430 #define SA_CDEV_MAJOR 14
 431
 432 static struct cdevsw sa_cdevsw = {
 433         /* name */      "sa",
 434         /* maj */       SA_CDEV_MAJOR,
 435         /* flags */     D_TAPE,
 436         /* port */      NULL,
 437         /* autoq */     0,
 438
 439         /* open */      saopen,
 440         /* close */     saclose,
 441         /* read */      physread,
 442         /* write */     physwrite,
 443         /* ioctl */     saioctl,
 444         /* poll */      nopoll,
 445         /* mmap */      nommap,
 446         /* strategy */  sastrategy,
 447         /* dump */      nodump,
 448         /* psize */     nopsize
 449 };
 450
 451 static struct extend_array *saperiphs;
 452
 453 static int
 454 saopen(dev_t dev, int flags, int fmt, struct thread *td)
 455 {
 456         struct cam_periph *periph;
 457         struct sa_softc *softc;
 458         int unit;
 459         int mode;
 460         int density;
 461         int error;
 462         int s;
 463
 464         unit = SAUNIT(dev);
 465         mode = SAMODE(dev);
 466         density = SADENSITY(dev);
 467
 468         s = splsoftcam();
 469         periph = cam_extend_get(saperiphs, unit);
 470         if (periph == NULL) {
 471                 (void) splx(s);
 472                 return (ENXIO);
 473         }
 474         softc = (struct sa_softc *)periph->softc;
 475         if ((error = cam_periph_lock(periph, PCATCH)) != 0) {
 476                 splx(s);
 477                 return (error);
 478         }
 479         splx(s);
 480
 481         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE|CAM_DEBUG_INFO,
 482             ("saopen(%d): dev=0x%x softc=0x%x\n", unit, unit, softc->flags));
 483
 484         if (cam_periph_acquire(periph) != CAM_REQ_CMP) {
 485                 cam_periph_unlock(periph);
 486                 return (ENXIO);
 487         }
 488         if (SA_IS_CTRL(dev)) {
 489                 softc->ctrl_mode = 1;
 490                 cam_periph_unlock(periph);
 491                 return (0);
 492         }
 493
 494
 495         if (softc->flags & SA_FLAG_OPEN) {
 496                 error = EBUSY;
 497         } else if (softc->flags & SA_FLAG_INVALID) {
 498                 error = ENXIO;
 499         } else {
 500                 /*
 501                  * The function samount ensures media is loaded and ready.
 502                  * It also does a device RESERVE if the tape isn't yet mounted.
 503                  */
 504                 error = samount(periph, flags, dev);
 505         }
 506
 507         if (error) {
 508                 cam_periph_release(periph);
 509         } else {
 510                 saprevent(periph, PR_PREVENT);
 511                 softc->flags |= SA_FLAG_OPEN;
 512         }
 513         cam_periph_unlock(periph);
 514         return (error);
 515 }
 516
 517 static int
 518 saclose(dev_t dev, int flag, int fmt, struct thread *td)
 519 {
 520         struct  cam_periph *periph;
 521         struct  sa_softc *softc;
 522         int     unit, mode, error, writing, tmp;
 523         int     closedbits = SA_FLAG_OPEN;
 524
 525         unit = SAUNIT(dev);
 526         mode = SAMODE(dev);
 527         periph = cam_extend_get(saperiphs, unit);
 528         if (periph == NULL)
 529                 return (ENXIO);
 530
 531         softc = (struct sa_softc *)periph->softc;
 532
 533         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE|CAM_DEBUG_INFO,
 534             ("saclose(%d): dev=0x%x softc=0x%x\n", unit, unit, softc->flags));
 535
 536
 537         if ((error = cam_periph_lock(periph, 0)) != 0) {
 538                 return (error);
 539         }
 540
 541         if (SA_IS_CTRL(dev)) {
 542                 softc->ctrl_mode = 0;
 543                 cam_periph_release(periph);
 544                 cam_periph_unlock(periph);
 545                 return (0);
 546         }
 547
 548         /*
 549          * Were we writing the tape?
 550          */
 551         writing = (softc->flags & SA_FLAG_TAPE_WRITTEN) != 0;
 552
 553         /*
 554          * See whether or not we need to write filemarks. If this
 555          * fails, we probably have to assume we've lost tape
 556          * position.
 557          */
 558         error = sacheckeod(periph);
 559         if (error) {
 560                 xpt_print_path(periph->path);
 561                 printf("failed to write terminating filemark(s)\n");
 562                 softc->flags |= SA_FLAG_TAPE_FROZEN;
 563         }
 564
 565         /*
 566          * Whatever we end up doing, allow users to eject tapes from here on.
 567          */
 568         saprevent(periph, PR_ALLOW);
 569
 570         /*
 571          * Decide how to end...
 572          */
 573         if ((softc->flags & SA_FLAG_TAPE_MOUNTED) == 0) {
 574                 closedbits |= SA_FLAG_TAPE_FROZEN;
 575         } else switch (mode) {
 576         case SA_MODE_OFFLINE:
 577                 /*
 578                  * An 'offline' close is an unconditional release of
 579                  * frozen && mount conditions, irrespective of whether
 580                  * these operations succeeded. The reason for this is
 581                  * to allow at least some kind of programmatic way
 582                  * around our state getting all fouled up. If somebody
 583                  * issues an 'offline' command, that will be allowed
 584                  * to clear state.
 585                  */
 586                 (void) sarewind(periph);
 587                 (void) saloadunload(periph, FALSE);
 588                 closedbits |= SA_FLAG_TAPE_MOUNTED|SA_FLAG_TAPE_FROZEN;
 589                 break;
 590         case SA_MODE_REWIND:
 591                 /*
 592                  * If the rewind fails, return an error- if anyone cares,
 593                  * but not overwriting any previous error.
 594                  *
 595                  * We don't clear the notion of mounted here, but we do
 596                  * clear the notion of frozen if we successfully rewound.
 597                  */
 598                 tmp = sarewind(periph);
 599                 if (tmp) {
 600                         if (error != 0)
 601                                 error = tmp;
 602                 } else {
 603                         closedbits |= SA_FLAG_TAPE_FROZEN;
 604                 }
 605                 break;
 606         case SA_MODE_NOREWIND:
 607                 /*
 608                  * If we're not rewinding/unloading the tape, find out
 609                  * whether we need to back up over one of two filemarks
 610                  * we wrote (if we wrote two filemarks) so that appends
 611                  * from this point on will be sane.
 612                  */
 613                 if (error == 0 && writing && (softc->quirks & SA_QUIRK_2FM)) {
 614                         tmp = saspace(periph, -1, SS_FILEMARKS);
 615                         if (tmp) {
 616                                 xpt_print_path(periph->path);
 617                                 printf("unable to backspace over one of double"
 618                                    " filemarks at end of tape\n");
 619                                 xpt_print_path(periph->path);
 620                                 printf("it is possible that this device"
 621                                    " needs a SA_QUIRK_1FM quirk set for it\n");
 622                                 softc->flags |= SA_FLAG_TAPE_FROZEN;
 623                         }
 624                 }
 625                 break;
 626         default:
 627                 xpt_print_path(periph->path);
 628                 panic("unknown mode 0x%x in saclose\n", mode);
 629                 /* NOTREACHED */
 630                 break;
 631         }
 632
 633         /*
 634          * We wish to note here that there are no more filemarks to be written.
 635          */
 636         softc->filemarks = 0;
 637         softc->flags &= ~SA_FLAG_TAPE_WRITTEN;
 638
 639         /*
 640          * And we are no longer open for business.
 641          */
 642         softc->flags &= ~closedbits;
 643
 644         /*
 645          * Inform users if tape state if frozen....
 646          */
 647         if (softc->flags & SA_FLAG_TAPE_FROZEN) {
 648                 xpt_print_path(periph->path);
 649                 printf("tape is now frozen- use an OFFLINE, REWIND or MTEOM "
 650                     "command to clear this state.\n");
 651         }
 652
 653         /* release the device if it is no longer mounted */
 654         if ((softc->flags & SA_FLAG_TAPE_MOUNTED) == 0)
 655                 sareservereleaseunit(periph, FALSE);
 656
 657         cam_periph_unlock(periph);
 658         cam_periph_release(periph);
 659
 660         return (error);
 661 }
 662
 663 /*
 664  * Actually translate the requested transfer into one the physical driver
 665  * can understand.  The transfer is described by a buf and will include
 666  * only one physical transfer.
 667  */
 668 static void
 669 sastrategy(struct buf *bp)
 670 {
 671         struct cam_periph *periph;
 672         struct sa_softc *softc;
 673         u_int  unit;
 674         int    s;
 675
 676         if (SA_IS_CTRL(bp->b_dev)) {
 677                 bp->b_error = EINVAL;
 678                 goto bad;
 679         }
 680         unit = SAUNIT(bp->b_dev);
 681         periph = cam_extend_get(saperiphs, unit);
 682         if (periph == NULL) {
 683                 bp->b_error = ENXIO;
 684                 goto bad;
 685         }
 686         softc = (struct sa_softc *)periph->softc;
 687
 688         s = splsoftcam();
 689
 690         if (softc->flags & SA_FLAG_INVALID) {
 691                 splx(s);
 692                 bp->b_error = ENXIO;
 693                 goto bad;
 694         }
 695
 696         if (softc->flags & SA_FLAG_TAPE_FROZEN) {
 697                 splx(s);
 698                 bp->b_error = EPERM;
 699                 goto bad;
 700         }
 701
 702         splx(s);
 703
 704         /*
 705          * If it's a null transfer, return immediatly
 706          */
 707         if (bp->b_bcount == 0)
 708                 goto done;
 709
 710         /* valid request?  */
 711         if (softc->flags & SA_FLAG_FIXED) {
 712                 /*
 713                  * Fixed block device.  The byte count must
 714                  * be a multiple of our block size.
 715                  */
 716                 if (((softc->blk_mask != ~0) &&
 717                     ((bp->b_bcount & softc->blk_mask) != 0)) ||
 718                     ((softc->blk_mask == ~0) &&
 719                     ((bp->b_bcount % softc->min_blk) != 0))) {
 720                         xpt_print_path(periph->path);
 721                         printf("Invalid request.  Fixed block device "
 722                                "requests must be a multiple "
 723                                "of %d bytes\n", softc->media_blksize);
 724                         bp->b_error = EINVAL;
 725                         goto bad;
 726                 }
 727         } else if ((bp->b_bcount > softc->max_blk) ||
 728                    (bp->b_bcount < softc->min_blk) ||
 729                    (bp->b_bcount & softc->blk_mask) != 0) {
 730
 731                 xpt_print_path(periph->path);
 732                 printf("Invalid request.  Variable block device "
 733                     "requests must be ");
 734                 if (softc->blk_mask != 0) {
 735                         printf("a multiple of %d ", (0x1 << softc->blk_gran));
 736                 }
 737                 printf("between %d and %d bytes\n", softc->min_blk,
 738                     softc->max_blk);
 739                 bp->b_error = EINVAL;
 740                 goto bad;
 741         }
 742
 743         /*
 744          * Mask interrupts so that the device cannot be invalidated until
 745          * after we are in the queue.  Otherwise, we might not properly
 746          * clean up one of the buffers.
 747          */
 748         s = splbio();
 749
 750         /*
 751          * Place it at the end of the queue.
 752          */
 753         bufq_insert_tail(&softc->buf_queue, bp);
 754
 755         softc->queue_count++;
 756         CAM_DEBUG(periph->path, CAM_DEBUG_INFO, ("sastrategy: enqueuing a %d "
 757             "%s byte %s queue count now %d\n", (int) bp->b_bcount,
 758              (softc->flags & SA_FLAG_FIXED)?  "fixed" : "variable",
 759              (bp->b_flags & B_READ)? "read" : "write", softc->queue_count));
 760
 761         splx(s);
 762
 763         /*
 764          * Schedule ourselves for performing the work.
 765          */
 766         xpt_schedule(periph, 1);
 767
 768         return;
 769 bad:
 770         bp->b_flags |= B_ERROR;
 771 done:
 772
 773         /*
 774          * Correctly set the buf to indicate a completed xfer
 775          */
 776         bp->b_resid = bp->b_bcount;
 777         biodone(bp);
 778 }
 779
 780 static int
 781 saioctl(dev_t dev, u_long cmd, caddr_t arg, int flag, struct thread *td)
 782 {
 783         struct cam_periph *periph;
 784         struct sa_softc *softc;
 785         scsi_space_code spaceop;
 786         int didlockperiph = 0;
 787         int s;
 788         int unit;
 789         int mode;
 790         int density;
 791         int error = 0;
 792
 793         unit = SAUNIT(dev);
 794         mode = SAMODE(dev);
 795         density = SADENSITY(dev);
 796         error = 0;              /* shut up gcc */
 797         spaceop = 0;            /* shut up gcc */
 798
 799         periph = cam_extend_get(saperiphs, unit);
 800         if (periph == NULL)
 801                 return (ENXIO);
 802
 803         softc = (struct sa_softc *)periph->softc;
 804
 805         /*
 806          * Check for control mode accesses. We allow MTIOCGET and
 807          * MTIOCERRSTAT (but need to be the only one open in order
 808          * to clear latched status), and MTSETBSIZE, MTSETDNSTY
 809          * and MTCOMP (but need to be the only one accessing this
 810          * device to run those).
 811          */
 812
 813         if (SA_IS_CTRL(dev)) {
 814                 switch (cmd) {
 815                 case MTIOCGETEOTMODEL:
 816                 case MTIOCGET:
 817                         break;
 818                 case MTIOCERRSTAT:
 819                         /*
 820                          * If the periph isn't already locked, lock it
 821                          * so our MTIOCERRSTAT can reset latched error stats.
 822                          *
 823                          * If the periph is already locked, skip it because
 824                          * we're just getting status and it'll be up to the
 825                          * other thread that has this device open to do
 826                          * an MTIOCERRSTAT that would clear latched status.
 827                          */
 828                         s = splsoftcam();
 829                         if ((periph->flags & CAM_PERIPH_LOCKED) == 0) {
 830                                 error = cam_periph_lock(periph, PCATCH);
 831                                 if (error != 0) {
 832                                         splx(s);
 833                                         return (error);
 834                                 }
 835                                 didlockperiph = 1;
 836                         }
 837                         break;
 838
 839                 case MTIOCSETEOTMODEL:
 840                 case MTSETBSIZ:
 841                 case MTSETDNSTY:
 842                 case MTCOMP:
 843                         /*
 844                          * We need to acquire the peripheral here rather
 845                          * than at open time because we are sharing writable
 846                          * access to data structures.
 847                          */
 848                         s = splsoftcam();
 849                         error = cam_periph_lock(periph, PCATCH);
 850                         if (error != 0) {
 851                                 splx(s);
 852                                 return (error);
 853                         }
 854                         didlockperiph = 1;
 855                         break;
 856
 857                 default:
 858                         return (EINVAL);
 859                 }
 860         }
 861
 862         /*
 863          * Find the device that the user is talking about
 864          */
 865         switch (cmd) {
 866         case MTIOCGET:
 867         {
 868                 struct mtget *g = (struct mtget *)arg;
 869
 870                 /*
 871                  * If this isn't the control mode device, actually go out
 872                  * and ask the drive again what it's set to.
 873                  */
 874                 if (!SA_IS_CTRL(dev)) {
 875                         u_int8_t write_protect;
 876                         int comp_enabled, comp_supported;
 877                         error = sagetparams(periph, SA_PARAM_ALL,
 878                             &softc->media_blksize, &softc->media_density,
 879                             &softc->media_numblks, &softc->buffer_mode,
 880                             &write_protect, &softc->speed, &comp_supported,
 881                             &comp_enabled, &softc->comp_algorithm, NULL);
 882                         if (error)
 883                                 break;
 884                         if (write_protect)
 885                                 softc->flags |= SA_FLAG_TAPE_WP;
 886                         else
 887                                 softc->flags &= ~SA_FLAG_TAPE_WP;
 888                         softc->flags &= ~(SA_FLAG_COMP_SUPP|
 889                             SA_FLAG_COMP_ENABLED|SA_FLAG_COMP_UNSUPP);
 890                         if (comp_supported) {
 891                                 if (softc->saved_comp_algorithm == 0)
 892                                         softc->saved_comp_algorithm =
 893                                             softc->comp_algorithm;
 894                                 softc->flags |= SA_FLAG_COMP_SUPP;
 895                                 if (comp_enabled)
 896                                         softc->flags |= SA_FLAG_COMP_ENABLED;
 897                         } else
 898                                 softc->flags |= SA_FLAG_COMP_UNSUPP;
 899                 }
 900                 bzero(g, sizeof(struct mtget));
 901                 g->mt_type = MT_ISAR;
 902                 if (softc->flags & SA_FLAG_COMP_UNSUPP) {
 903                         g->mt_comp = MT_COMP_UNSUPP;
 904                         g->mt_comp0 = MT_COMP_UNSUPP;
 905                         g->mt_comp1 = MT_COMP_UNSUPP;
 906                         g->mt_comp2 = MT_COMP_UNSUPP;
 907                         g->mt_comp3 = MT_COMP_UNSUPP;
 908                 } else {
 909                         if ((softc->flags & SA_FLAG_COMP_ENABLED) == 0) {
 910                                 g->mt_comp = MT_COMP_DISABLED;
 911                         } else {
 912                                 g->mt_comp = softc->comp_algorithm;
 913                         }
 914                         g->mt_comp0 = softc->comp_algorithm;
 915                         g->mt_comp1 = softc->comp_algorithm;
 916                         g->mt_comp2 = softc->comp_algorithm;
 917                         g->mt_comp3 = softc->comp_algorithm;
 918                 }
 919                 g->mt_density = softc->media_density;
 920                 g->mt_density0 = softc->media_density;
 921                 g->mt_density1 = softc->media_density;
 922                 g->mt_density2 = softc->media_density;
 923                 g->mt_density3 = softc->media_density;
 924                 g->mt_blksiz = softc->media_blksize;
 925                 g->mt_blksiz0 = softc->media_blksize;
 926                 g->mt_blksiz1 = softc->media_blksize;
 927                 g->mt_blksiz2 = softc->media_blksize;
 928                 g->mt_blksiz3 = softc->media_blksize;
 929                 g->mt_fileno = softc->fileno;
 930                 g->mt_blkno = softc->blkno;
 931                 g->mt_dsreg = (short) softc->dsreg;
 932                 /*
 933                  * Yes, we know that this is likely to overflow
 934                  */
 935                 if (softc->last_resid_was_io) {
 936                         if ((g->mt_resid = (short) softc->last_io_resid) != 0) {
 937                                 if (SA_IS_CTRL(dev) == 0 || didlockperiph) {
 938                                         softc->last_io_resid = 0;
 939                                 }
 940                         }
 941                 } else {
 942                         if ((g->mt_resid = (short)softc->last_ctl_resid) != 0) {
 943                                 if (SA_IS_CTRL(dev) == 0 || didlockperiph) {
 944                                         softc->last_ctl_resid = 0;
 945                                 }
 946                         }
 947                 }
 948                 error = 0;
 949                 break;
 950         }
 951         case MTIOCERRSTAT:
 952         {
 953                 struct scsi_tape_errors *sep =
 954                     &((union mterrstat *)arg)->scsi_errstat;
 955
 956                 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
 957                     ("saioctl: MTIOCERRSTAT\n"));
 958
 959                 bzero(sep, sizeof(*sep));
 960                 sep->io_resid = softc->last_io_resid;
 961                 bcopy((caddr_t) &softc->last_io_sense, sep->io_sense,
 962                     sizeof (sep->io_sense));
 963                 bcopy((caddr_t) &softc->last_io_cdb, sep->io_cdb,
 964                     sizeof (sep->io_cdb));
 965                 sep->ctl_resid = softc->last_ctl_resid;
 966                 bcopy((caddr_t) &softc->last_ctl_sense, sep->ctl_sense,
 967                     sizeof (sep->ctl_sense));
 968                 bcopy((caddr_t) &softc->last_ctl_cdb, sep->ctl_cdb,
 969                     sizeof (sep->ctl_cdb));
 970
 971                 if (SA_IS_CTRL(dev) == 0 || didlockperiph)
 972                         bzero((caddr_t) &softc->errinfo,
 973                             sizeof (softc->errinfo));
 974                 error = 0;
 975                 break;
 976         }
 977         case MTIOCTOP:
 978         {
 979                 struct mtop *mt;
 980                 int    count;
 981
 982                 mt = (struct mtop *)arg;
 983
 984                 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
 985                          ("saioctl: op=0x%x count=0x%x\n",
 986                           mt->mt_op, mt->mt_count));
 987
 988                 count = mt->mt_count;
 989                 switch (mt->mt_op) {
 990                 case MTWEOF:    /* write an end-of-file marker */
 991                         /*
 992                          * We don't need to clear the SA_FLAG_TAPE_WRITTEN
 993                          * flag because by keeping track of filemarks
 994                          * we have last written we know ehether or not
 995                          * we need to write more when we close the device.
 996                          */
 997                         error = sawritefilemarks(periph, count, FALSE);
 998                         break;
 999                 case MTWSS:     /* write a setmark */
1000                         error = sawritefilemarks(periph, count, TRUE);
1001                         break;
1002                 case MTBSR:     /* backward space record */
1003                 case MTFSR:     /* forward space record */
1004                 case MTBSF:     /* backward space file */
1005                 case MTFSF:     /* forward space file */
1006                 case MTBSS:     /* backward space setmark */
1007                 case MTFSS:     /* forward space setmark */
1008                 case MTEOD:     /* space to end of recorded medium */
1009                 {
1010                         int nmarks;
1011
1012                         spaceop = SS_FILEMARKS;
1013                         nmarks = softc->filemarks;
1014                         error = sacheckeod(periph);
1015                         if (error) {
1016                                 xpt_print_path(periph->path);
1017                                 printf("EOD check prior to spacing failed\n");
1018                                 softc->flags |= SA_FLAG_EIO_PENDING;
1019                                 break;
1020                         }
1021                         nmarks -= softc->filemarks;
1022                         switch(mt->mt_op) {
1023                         case MTBSR:
1024                                 count = -count;
1025                                 /* FALLTHROUGH */
1026                         case MTFSR:
1027                                 spaceop = SS_BLOCKS;
1028                                 break;
1029                         case MTBSF:
1030                                 count = -count;
1031                                 /* FALLTHROUGH */
1032                         case MTFSF:
1033                                 break;
1034                         case MTBSS:
1035                                 count = -count;
1036                                 /* FALLTHROUGH */
1037                         case MTFSS:
1038                                 spaceop = SS_SETMARKS;
1039                                 break;
1040                         case MTEOD:
1041                                 spaceop = SS_EOD;
1042                                 count = 0;
1043                                 nmarks = 0;
1044                                 break;
1045                         default:
1046                                 error = EINVAL;
1047                                 break;
1048                         }
1049                         if (error)
1050                                 break;
1051
1052                         nmarks = softc->filemarks;
1053                         /*
1054                          * XXX: Why are we checking again?
1055                          */
1056                         error = sacheckeod(periph);
1057                         if (error)
1058                                 break;
1059                         nmarks -= softc->filemarks;
1060                         error = saspace(periph, count - nmarks, spaceop);
1061                         /*
1062                          * At this point, clear that we've written the tape
1063                          * and that we've written any filemarks. We really
1064                          * don't know what the applications wishes to do next-
1065                          * the sacheckeod's will make sure we terminated the
1066                          * tape correctly if we'd been writing, but the next
1067                          * action the user application takes will set again
1068                          * whether we need to write filemarks.
1069                          */
1070                         softc->flags &=
1071                             ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
1072                         softc->filemarks = 0;
1073                         break;
1074                 }
1075                 case MTREW:     /* rewind */
1076                         (void) sacheckeod(periph);
1077                         error = sarewind(periph);
1078                         /* see above */
1079                         softc->flags &=
1080                             ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
1081                         softc->flags &= ~SA_FLAG_ERR_PENDING;
1082                         softc->filemarks = 0;
1083                         break;
1084                 case MTERASE:   /* erase */
1085                         error = saerase(periph, count);
1086                         softc->flags &=
1087                             ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
1088                         softc->flags &= ~SA_FLAG_ERR_PENDING;
1089                         break;
1090                 case MTRETENS:  /* re-tension tape */
1091                         error = saretension(periph);
1092                         softc->flags &=
1093                             ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
1094                         softc->flags &= ~SA_FLAG_ERR_PENDING;
1095                         break;
1096                 case MTOFFL:    /* rewind and put the drive offline */
1097
1098                         (void) sacheckeod(periph);
1099                         /* see above */
1100                         softc->flags &= ~SA_FLAG_TAPE_WRITTEN;
1101                         softc->filemarks = 0;
1102
1103                         error = sarewind(periph);
1104                         /* clear the frozen flag anyway */
1105                         softc->flags &= ~SA_FLAG_TAPE_FROZEN;
1106
1107                         /*
1108                          * Be sure to allow media removal before ejecting.
1109                          */
1110
1111                         saprevent(periph, PR_ALLOW);
1112                         if (error == 0) {
1113                                 error = saloadunload(periph, FALSE);
1114                                 if (error == 0) {
1115                                         softc->flags &= ~SA_FLAG_TAPE_MOUNTED;
1116                                 }
1117                         }
1118                         break;
1119
1120                 case MTNOP:     /* no operation, sets status only */
1121                 case MTCACHE:   /* enable controller cache */
1122                 case MTNOCACHE: /* disable controller cache */
1123                         error = 0;
1124                         break;
1125
1126                 case MTSETBSIZ: /* Set block size for device */
1127
1128                         error = sasetparams(periph, SA_PARAM_BLOCKSIZE, count,
1129                                             0, 0, 0);
1130                         if (error == 0) {
1131                                 softc->last_media_blksize =
1132                                     softc->media_blksize;
1133                                 softc->media_blksize = count;
1134                                 if (count) {
1135                                         softc->flags |= SA_FLAG_FIXED;
1136                                         if (powerof2(count)) {
1137                                                 softc->blk_shift =
1138                                                     ffs(count) - 1;
1139                                                 softc->blk_mask = count - 1;
1140                                         } else {
1141                                                 softc->blk_mask = ~0;
1142                                                 softc->blk_shift = 0;
1143                                         }
1144                                         /*
1145                                          * Make the user's desire 'persistent'.
1146                                          */
1147                                         softc->quirks &= ~SA_QUIRK_VARIABLE;
1148                                         softc->quirks |= SA_QUIRK_FIXED;
1149                                 } else {
1150                                         softc->flags &= ~SA_FLAG_FIXED;
1151                                         if (softc->max_blk == 0) {
1152                                                 softc->max_blk = ~0;
1153                                         }
1154                                         softc->blk_shift = 0;
1155                                         if (softc->blk_gran != 0) {
1156                                                 softc->blk_mask =
1157                                                     softc->blk_gran - 1;
1158                                         } else {
1159                                                 softc->blk_mask = 0;
1160                                         }
1161                                         /*
1162                                          * Make the user's desire 'persistent'.
1163                                          */
1164                                         softc->quirks |= SA_QUIRK_VARIABLE;
1165                                         softc->quirks &= ~SA_QUIRK_FIXED;
1166                                 }
1167                         }
1168                         break;
1169                 case MTSETDNSTY:        /* Set density for device and mode */
1170                         if (count > UCHAR_MAX) {
1171                                 error = EINVAL;
1172                                 break;
1173                         } else {
1174                                 error = sasetparams(periph, SA_PARAM_DENSITY,
1175                                                     0, count, 0, 0);
1176                         }
1177                         break;
1178                 case MTCOMP:    /* enable compression */
1179                         /*
1180                          * Some devices don't support compression, and
1181                          * don't like it if you ask them for the
1182                          * compression page.
1183                          */
1184                         if ((softc->quirks & SA_QUIRK_NOCOMP) ||
1185                             (softc->flags & SA_FLAG_COMP_UNSUPP)) {
1186                                 error = ENODEV;
1187                                 break;
1188                         }
1189                         error = sasetparams(periph, SA_PARAM_COMPRESSION,
1190                             0, 0, count, SF_NO_PRINT);
1191                         break;
1192                 default:
1193                         error = EINVAL;
1194                 }
1195                 break;
1196         }
1197         case MTIOCIEOT:
1198         case MTIOCEEOT:
1199                 error = 0;
1200                 break;
1201         case MTIOCRDSPOS:
1202                 error = sardpos(periph, 0, (u_int32_t *) arg);
1203                 break;
1204         case MTIOCRDHPOS:
1205                 error = sardpos(periph, 1, (u_int32_t *) arg);
1206                 break;
1207         case MTIOCSLOCATE:
1208                 error = sasetpos(periph, 0, (u_int32_t *) arg);
1209                 break;
1210         case MTIOCHLOCATE:
1211                 error = sasetpos(periph, 1, (u_int32_t *) arg);
1212                 break;
1213         case MTIOCGETEOTMODEL:
1214                 error = 0;
1215                 if (softc->quirks & SA_QUIRK_1FM)
1216                         mode = 1;
1217                 else
1218                         mode = 2;
1219                 *((u_int32_t *) arg) = mode;
1220                 break;
1221         case MTIOCSETEOTMODEL:
1222                 error = 0;
1223                 switch (*((u_int32_t *) arg)) {
1224                 case 1:
1225                         softc->quirks &= ~SA_QUIRK_2FM;
1226                         softc->quirks |= SA_QUIRK_1FM;
1227                         break;
1228                 case 2:
1229                         softc->quirks &= ~SA_QUIRK_1FM;
1230                         softc->quirks |= SA_QUIRK_2FM;
1231                         break;
1232                 default:
1233                         error = EINVAL;
1234                         break;
1235                 }
1236                 break;
1237         default:
1238                 error = cam_periph_ioctl(periph, cmd, arg, saerror);
1239                 break;
1240         }
1241
1242         /*
1243          * Check to see if we cleared a frozen state
1244          */
1245         if (error == 0 && (softc->flags & SA_FLAG_TAPE_FROZEN)) {
1246                 switch(cmd) {
1247                 case MTIOCRDSPOS:
1248                 case MTIOCRDHPOS:
1249                 case MTIOCSLOCATE:
1250                 case MTIOCHLOCATE:
1251                         softc->fileno = (daddr_t) -1;
1252                         softc->blkno = (daddr_t) -1;
1253                         softc->flags &= ~SA_FLAG_TAPE_FROZEN;
1254                         xpt_print_path(periph->path);
1255                         printf("tape state now unfrozen.\n");
1256                         break;
1257                 default:
1258                         break;
1259                 }
1260         }
1261         if (didlockperiph) {
1262                 cam_periph_unlock(periph);
1263         }
1264         return (error);
1265 }
1266
1267 static void
1268 sainit(void)
1269 {
1270         cam_status status;
1271         struct cam_path *path;
1272
1273         /*
1274          * Create our extend array for storing the devices we attach to.
1275          */
1276         saperiphs = cam_extend_new();
1277         if (saperiphs == NULL) {
1278                 printf("sa: Failed to alloc extend array!\n");
1279                 return;
1280         }
1281
1282         /*
1283          * Install a global async callback.
1284          */
1285         status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID,
1286                                  CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
1287
1288         if (status == CAM_REQ_CMP) {
1289                 /* Register the async callbacks of interrest */
1290                 struct ccb_setasync csa; /*
1291                                           * This is an immediate CCB,
1292                                           * so using the stack is OK
1293                                           */
1294                 xpt_setup_ccb(&csa.ccb_h, path, 5);
1295                 csa.ccb_h.func_code = XPT_SASYNC_CB;
1296                 csa.event_enable = AC_FOUND_DEVICE;
1297                 csa.callback = saasync;
1298                 csa.callback_arg = NULL;
1299                 xpt_action((union ccb *)&csa);
1300                 status = csa.ccb_h.status;
1301                 xpt_free_path(path);
1302         }
1303
1304         if (status != CAM_REQ_CMP) {
1305                 printf("sa: Failed to attach master async callback "
1306                        "due to status 0x%x!\n", status);
1307         }
1308 }
1309
1310 static void
1311 saoninvalidate(struct cam_periph *periph)
1312 {
1313         struct sa_softc *softc;
1314         struct buf *q_bp;
1315         struct ccb_setasync csa;
1316         int s;
1317
1318         softc = (struct sa_softc *)periph->softc;
1319
1320         /*
1321          * De-register any async callbacks.
1322          */
1323         xpt_setup_ccb(&csa.ccb_h, periph->path,
1324                       /* priority */ 5);
1325         csa.ccb_h.func_code = XPT_SASYNC_CB;
1326         csa.event_enable = 0;
1327         csa.callback = saasync;
1328         csa.callback_arg = periph;
1329         xpt_action((union ccb *)&csa);
1330
1331         softc->flags |= SA_FLAG_INVALID;
1332
1333         /*
1334          * Although the oninvalidate() routines are always called at
1335          * splsoftcam, we need to be at splbio() here to keep the buffer
1336          * queue from being modified while we traverse it.
1337          */
1338         s = splbio();
1339
1340         /*
1341          * Return all queued I/O with ENXIO.
1342          * XXX Handle any transactions queued to the card
1343          *     with XPT_ABORT_CCB.
1344          */
1345         while ((q_bp = bufq_first(&softc->buf_queue)) != NULL){
1346                 bufq_remove(&softc->buf_queue, q_bp);
1347                 q_bp->b_resid = q_bp->b_bcount;
1348                 q_bp->b_error = ENXIO;
1349                 q_bp->b_flags |= B_ERROR;
1350                 biodone(q_bp);
1351         }
1352         softc->queue_count = 0;
1353         splx(s);
1354
1355         xpt_print_path(periph->path);
1356         printf("lost device\n");
1357
1358 }
1359
1360 static void
1361 sacleanup(struct cam_periph *periph)
1362 {
1363         struct sa_softc *softc;
1364         int i;
1365
1366         softc = (struct sa_softc *)periph->softc;
1367
1368         devstat_remove_entry(&softc->device_stats);
1369
1370         destroy_dev(softc->devs.ctl_dev);
1371         destroy_dev(softc->devs.r_dev);
1372         destroy_dev(softc->devs.nr_dev);
1373         destroy_dev(softc->devs.er_dev);
1374
1375         for (i = 0; i < SA_NUM_MODES; i++) {
1376                 destroy_dev(softc->devs.mode_devs[i].r_dev);
1377                 destroy_dev(softc->devs.mode_devs[i].nr_dev);
1378                 destroy_dev(softc->devs.mode_devs[i].er_dev);
1379         }
1380
1381         cam_extend_release(saperiphs, periph->unit_number);
1382         xpt_print_path(periph->path);
1383         printf("removing device entry\n");
1384         free(softc, M_DEVBUF);
1385 }
1386
1387 static void
1388 saasync(void *callback_arg, u_int32_t code,
1389         struct cam_path *path, void *arg)
1390 {
1391         struct cam_periph *periph;
1392
1393         periph = (struct cam_periph *)callback_arg;
1394         switch (code) {
1395         case AC_FOUND_DEVICE:
1396         {
1397                 struct ccb_getdev *cgd;
1398                 cam_status status;
1399
1400                 cgd = (struct ccb_getdev *)arg;
1401                 if (cgd == NULL)
1402                         break;
1403
1404                 if (SID_TYPE(&cgd->inq_data) != T_SEQUENTIAL)
1405                         break;
1406
1407                 /*
1408                  * Allocate a peripheral instance for
1409                  * this device and start the probe
1410                  * process.
1411                  */
1412                 status = cam_periph_alloc(saregister, saoninvalidate,
1413                                           sacleanup, sastart,
1414                                           "sa", CAM_PERIPH_BIO, cgd->ccb_h.path,
1415                                           saasync, AC_FOUND_DEVICE, cgd);
1416
1417                 if (status != CAM_REQ_CMP
1418                  && status != CAM_REQ_INPROG)
1419                         printf("saasync: Unable to probe new device "
1420                                 "due to status 0x%x\n", status);
1421                 break;
1422         }
1423         default:
1424                 cam_periph_async(periph, code, path, arg);
1425                 break;
1426         }
1427 }
1428
1429 static cam_status
1430 saregister(struct cam_periph *periph, void *arg)
1431 {
1432         struct sa_softc *softc;
1433         struct ccb_setasync csa;
1434         struct ccb_getdev *cgd;
1435         caddr_t match;
1436         int i;
1437
1438         cgd = (struct ccb_getdev *)arg;
1439         if (periph == NULL) {
1440                 printf("saregister: periph was NULL!!\n");
1441                 return (CAM_REQ_CMP_ERR);
1442         }
1443
1444         if (cgd == NULL) {
1445                 printf("saregister: no getdev CCB, can't register device\n");
1446                 return (CAM_REQ_CMP_ERR);
1447         }
1448
1449         softc = (struct sa_softc *)malloc(sizeof (*softc), M_DEVBUF, M_NOWAIT);
1450         if (softc == NULL) {
1451                 printf("saregister: Unable to probe new device. "
1452                        "Unable to allocate softc\n");
1453                 return (CAM_REQ_CMP_ERR);
1454         }
1455
1456         bzero(softc, sizeof(*softc));
1457         softc->scsi_rev = SID_ANSI_REV(&cgd->inq_data);
1458         softc->state = SA_STATE_NORMAL;
1459         softc->fileno = (daddr_t) -1;
1460         softc->blkno = (daddr_t) -1;
1461
1462         bufq_init(&softc->buf_queue);
1463         periph->softc = softc;
1464         cam_extend_set(saperiphs, periph->unit_number, periph);
1465
1466         /*
1467          * See if this device has any quirks.
1468          */
1469         match = cam_quirkmatch((caddr_t)&cgd->inq_data,
1470                                (caddr_t)sa_quirk_table,
1471                                sizeof(sa_quirk_table)/sizeof(*sa_quirk_table),
1472                                sizeof(*sa_quirk_table), scsi_inquiry_match);
1473
1474         if (match != NULL) {
1475                 softc->quirks = ((struct sa_quirk_entry *)match)->quirks;
1476                 softc->last_media_blksize =
1477                     ((struct sa_quirk_entry *)match)->prefblk;
1478 #ifdef  CAMDEBUG
1479                 xpt_print_path(periph->path);
1480                 printf("found quirk entry %d\n", (int)
1481                     (((struct sa_quirk_entry *) match) - sa_quirk_table));
1482 #endif
1483         } else
1484                 softc->quirks = SA_QUIRK_NONE;
1485
1486         /*
1487          * The SA driver supports a blocksize, but we don't know the
1488          * blocksize until we media is inserted.  So, set a flag to
1489          * indicate that the blocksize is unavailable right now.
1490          */
1491         devstat_add_entry(&softc->device_stats, "sa", periph->unit_number, 0,
1492             DEVSTAT_BS_UNAVAILABLE, SID_TYPE(&cgd->inq_data) |
1493             DEVSTAT_TYPE_IF_SCSI, DEVSTAT_PRIORITY_TAPE);
1494
1495         softc->devs.ctl_dev = make_dev(&sa_cdevsw, SAMINOR(SA_CTLDEV,
1496             periph->unit_number, 0, SA_ATYPE_R), UID_ROOT, GID_OPERATOR,
1497             0660, "r%s%d.ctl", periph->periph_name, periph->unit_number);
1498
1499         softc->devs.r_dev = make_dev(&sa_cdevsw, SAMINOR(SA_NOT_CTLDEV,
1500             periph->unit_number, 0, SA_ATYPE_R), UID_ROOT, GID_OPERATOR,
1501             0660, "r%s%d", periph->periph_name, periph->unit_number);
1502
1503         softc->devs.nr_dev = make_dev(&sa_cdevsw, SAMINOR(SA_NOT_CTLDEV,
1504             periph->unit_number, 0, SA_ATYPE_NR), UID_ROOT, GID_OPERATOR,
1505             0660, "nr%s%d", periph->periph_name, periph->unit_number);
1506
1507         softc->devs.er_dev = make_dev(&sa_cdevsw, SAMINOR(SA_NOT_CTLDEV,
1508             periph->unit_number, 0, SA_ATYPE_ER), UID_ROOT, GID_OPERATOR,
1509             0660, "er%s%d", periph->periph_name, periph->unit_number);
1510
1511         for (i = 0; i < SA_NUM_MODES; i++) {
1512
1513                 softc->devs.mode_devs[i].r_dev = make_dev(&sa_cdevsw,
1514                     SAMINOR(SA_NOT_CTLDEV, periph->unit_number, i, SA_ATYPE_R),
1515                     UID_ROOT, GID_OPERATOR, 0660, "r%s%d.%d",
1516                     periph->periph_name, periph->unit_number, i);
1517
1518                 softc->devs.mode_devs[i].nr_dev = make_dev(&sa_cdevsw,
1519                     SAMINOR(SA_NOT_CTLDEV, periph->unit_number, i, SA_ATYPE_NR),
1520                     UID_ROOT, GID_OPERATOR, 0660, "nr%s%d.%d",
1521                     periph->periph_name, periph->unit_number, i);
1522
1523
1524                 softc->devs.mode_devs[i].er_dev = make_dev(&sa_cdevsw,
1525                     SAMINOR(SA_NOT_CTLDEV, periph->unit_number, i, SA_ATYPE_ER),
1526                     UID_ROOT, GID_OPERATOR, 0660, "er%s%d.%d",
1527                     periph->periph_name, periph->unit_number, i);
1528         }
1529
1530         /*
1531          * Add an async callback so that we get
1532          * notified if this device goes away.
1533          */
1534         xpt_setup_ccb(&csa.ccb_h, periph->path, /* priority */ 5);
1535         csa.ccb_h.func_code = XPT_SASYNC_CB;
1536         csa.event_enable = AC_LOST_DEVICE;
1537         csa.callback = saasync;
1538         csa.callback_arg = periph;
1539         xpt_action((union ccb *)&csa);
1540
1541         xpt_announce_periph(periph, NULL);
1542
1543         return (CAM_REQ_CMP);
1544 }
1545
1546 static void
1547 sastart(struct cam_periph *periph, union ccb *start_ccb)
1548 {
1549         struct sa_softc *softc;
1550
1551         softc = (struct sa_softc *)periph->softc;
1552
1553         CAM_DEBUG(periph->path, CAM_DEBUG_INFO, ("sastart"));
1554
1555
1556         switch (softc->state) {
1557         case SA_STATE_NORMAL:
1558         {
1559                 /* Pull a buffer from the queue and get going on it */
1560                 struct buf *bp;
1561                 int s;
1562
1563                 /*
1564                  * See if there is a buf with work for us to do..
1565                  */
1566                 s = splbio();
1567                 bp = bufq_first(&softc->buf_queue);
1568                 if (periph->immediate_priority <= periph->pinfo.priority) {
1569                         CAM_DEBUG_PRINT(CAM_DEBUG_SUBTRACE,
1570                                         ("queuing for immediate ccb\n"));
1571                         Set_CCB_Type(start_ccb, SA_CCB_WAITING);
1572                         SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
1573                                           periph_links.sle);
1574                         periph->immediate_priority = CAM_PRIORITY_NONE;
1575                         splx(s);
1576                         wakeup(&periph->ccb_list);
1577                 } else if (bp == NULL) {
1578                         splx(s);
1579                         xpt_release_ccb(start_ccb);
1580                 } else if ((softc->flags & SA_FLAG_ERR_PENDING) != 0) {
1581                         struct buf *done_bp;
1582 again:
1583                         softc->queue_count--;
1584                         bufq_remove(&softc->buf_queue, bp);
1585                         bp->b_resid = bp->b_bcount;
1586                         done_bp = bp;
1587                         if ((softc->flags & SA_FLAG_EOM_PENDING) != 0) {
1588                                 /*
1589                                  * We now just clear errors in this case
1590                                  * and let the residual be the notifier.
1591                                  */
1592                                 bp->b_error = 0;
1593                         } else if ((softc->flags & SA_FLAG_EOF_PENDING) != 0) {
1594                                 /*
1595                                  * This can only happen if we're reading
1596                                  * in fixed length mode. In this case,
1597                                  * we dump the rest of the list the
1598                                  * same way.
1599                                  */
1600                                 bp->b_error = 0;
1601                                 if (bufq_first(&softc->buf_queue) != NULL) {
1602                                         biodone(done_bp);
1603                                         goto again;
1604                                 }
1605                         } else if ((softc->flags & SA_FLAG_EIO_PENDING) != 0) {
1606                                 bp->b_error = EIO;
1607                                 bp->b_flags |= B_ERROR;
1608                         }
1609                         bp = bufq_first(&softc->buf_queue);
1610                         /*
1611                          * Only if we have no other buffers queued up
1612                          * do we clear the pending error flag.
1613                          */
1614                         if (bp == NULL)
1615                                 softc->flags &= ~SA_FLAG_ERR_PENDING;
1616                         CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
1617                             ("sastart- ERR_PENDING now 0x%x, bp is %sNULL, "
1618                             "%d more buffers queued up\n",
1619                             (softc->flags & SA_FLAG_ERR_PENDING),
1620                             (bp != NULL)? "not " : " ", softc->queue_count));
1621                         splx(s);
1622                         xpt_release_ccb(start_ccb);
1623                         biodone(done_bp);
1624                 } else {
1625                         u_int32_t length;
1626
1627                         bufq_remove(&softc->buf_queue, bp);
1628                         softc->queue_count--;
1629
1630                         if ((softc->flags & SA_FLAG_FIXED) != 0) {
1631                                 if (softc->blk_shift != 0) {
1632                                         length =
1633                                             bp->b_bcount >> softc->blk_shift;
1634                                 } else if (softc->media_blksize != 0) {
1635                                         length =
1636                                             bp->b_bcount / softc->media_blksize;
1637                                 } else {
1638                                         bp->b_error = EIO;
1639                                         xpt_print_path(periph->path);
1640                                         printf("zero blocksize for "
1641                                             "FIXED length writes?\n");
1642                                         splx(s);
1643                                         biodone(bp);
1644                                         break;
1645                                 }
1646                                 CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
1647                                     ("Fixed Record Count is %d\n", length));
1648                         } else {
1649                                 length = bp->b_bcount;
1650                                 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_INFO,
1651                                     ("Variable Record Count is %d\n", length));
1652                         }
1653                         devstat_start_transaction(&softc->device_stats);
1654                         /*
1655                          * Some people have theorized that we should
1656                          * suppress illegal length indication if we are
1657                          * running in variable block mode so that we don't
1658                          * have to request sense every time our requested
1659                          * block size is larger than the written block.
1660                          * The residual information from the ccb allows
1661                          * us to identify this situation anyway.  The only
1662                          * problem with this is that we will not get
1663                          * information about blocks that are larger than
1664                          * our read buffer unless we set the block size
1665                          * in the mode page to something other than 0.
1666                          *
1667                          * I believe that this is a non-issue. If user apps
1668                          * don't adjust their read size to match our record
1669                          * size, that's just life. Anyway, the typical usage
1670                          * would be to issue, e.g., 64KB reads and occasionally
1671                          * have to do deal with 512 byte or 1KB intermediate
1672                          * records.
1673                          */
1674                         softc->dsreg = (bp->b_flags & B_READ)?
1675                             MTIO_DSREG_RD : MTIO_DSREG_WR;
1676                         scsi_sa_read_write(&start_ccb->csio, 0, sadone,
1677                             MSG_SIMPLE_Q_TAG, (bp->b_flags & B_READ) != 0,
1678                             FALSE, (softc->flags & SA_FLAG_FIXED) != 0,
1679                             length, bp->b_data, bp->b_bcount, SSD_FULL_SIZE,
1680                             IO_TIMEOUT);
1681                         start_ccb->ccb_h.ccb_pflags &= ~SA_POSITION_UPDATED;
1682                         Set_CCB_Type(start_ccb, SA_CCB_BUFFER_IO);
1683                         start_ccb->ccb_h.ccb_bp = bp;
1684                         bp = bufq_first(&softc->buf_queue);
1685                         splx(s);
1686                         xpt_action(start_ccb);
1687                 }
1688
1689                 if (bp != NULL) {
1690                         /* Have more work to do, so ensure we stay scheduled */
1691                         xpt_schedule(periph, 1);
1692                 }
1693                 break;
1694         }
1695         case SA_STATE_ABNORMAL:
1696         default:
1697                 panic("state 0x%x in sastart", softc->state);
1698                 break;
1699         }
1700 }
1701
1702
1703 static void
1704 sadone(struct cam_periph *periph, union ccb *done_ccb)
1705 {
1706         struct sa_softc *softc;
1707         struct ccb_scsiio *csio;
1708
1709         softc = (struct sa_softc *)periph->softc;
1710         csio = &done_ccb->csio;
1711         switch (CCB_Type(csio)) {
1712         case SA_CCB_BUFFER_IO:
1713         {
1714                 struct buf *bp;
1715                 int error;
1716
1717                 softc->dsreg = MTIO_DSREG_REST;
1718                 bp = (struct buf *)done_ccb->ccb_h.ccb_bp;
1719                 error = 0;
1720                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
1721                         if ((error = saerror(done_ccb, 0, 0)) == ERESTART) {
1722                                 /*
1723                                  * A retry was scheduled, so just return.
1724                                  */
1725                                 return;
1726                         }
1727                 }
1728
1729                 if (error == EIO) {
1730                         int s;
1731                         struct buf *q_bp;
1732
1733                         /*
1734                          * Catastrophic error. Mark the tape as frozen
1735                          * (we no longer know tape position).
1736                          *
1737                          * Return all queued I/O with EIO, and unfreeze
1738                          * our queue so that future transactions that
1739                          * attempt to fix this problem can get to the
1740                          * device.
1741                          *
1742                          */
1743
1744                         s = splbio();
1745                         softc->flags |= SA_FLAG_TAPE_FROZEN;
1746                         while ((q_bp = bufq_first(&softc->buf_queue)) != NULL) {
1747                                 bufq_remove(&softc->buf_queue, q_bp);
1748                                 q_bp->b_resid = q_bp->b_bcount;
1749                                 q_bp->b_error = EIO;
1750                                 q_bp->b_flags |= B_ERROR;
1751                                 biodone(q_bp);
1752                         }
1753                         splx(s);
1754                 }
1755                 if (error != 0) {
1756                         bp->b_resid = bp->b_bcount;
1757                         bp->b_error = error;
1758                         bp->b_flags |= B_ERROR;
1759                         /*
1760                          * In the error case, position is updated in saerror.
1761                          */
1762                 } else {
1763                         bp->b_resid = csio->resid;
1764                         bp->b_error = 0;
1765                         if (csio->resid != 0) {
1766                                 bp->b_flags |= B_ERROR;
1767                         }
1768                         if ((bp->b_flags & B_READ) == 0) {
1769                                 softc->flags |= SA_FLAG_TAPE_WRITTEN;
1770                                 softc->filemarks = 0;
1771                         }
1772                         if (!(csio->ccb_h.ccb_pflags & SA_POSITION_UPDATED) &&
1773                             (softc->blkno != (daddr_t) -1)) {
1774                                 if ((softc->flags & SA_FLAG_FIXED) != 0) {
1775                                         u_int32_t l;
1776                                         if (softc->blk_shift != 0) {
1777                                                 l = bp->b_bcount >>
1778                                                         softc->blk_shift;
1779                                         } else {
1780                                                 l = bp->b_bcount /
1781                                                         softc->media_blksize;
1782                                         }
1783                                         softc->blkno += (daddr_t) l;
1784                                 } else {
1785                                         softc->blkno++;
1786                                 }
1787                         }
1788                 }
1789                 /*
1790                  * If we had an error (immediate or pending),
1791                  * release the device queue now.
1792                  */
1793                 if (error || (softc->flags & SA_FLAG_ERR_PENDING))
1794                         cam_release_devq(done_ccb->ccb_h.path, 0, 0, 0, 0);
1795 #ifdef  CAMDEBUG
1796                 if (error || bp->b_resid) {
1797                         CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
1798                                   ("error %d resid %ld count %ld\n", error,
1799                                   bp->b_resid, bp->b_bcount));
1800                 }
1801 #endif
1802                 devstat_end_transaction_buf(&softc->device_stats, bp);
1803                 biodone(bp);
1804                 break;
1805         }
1806         case SA_CCB_WAITING:
1807         {
1808                 /* Caller will release the CCB */
1809                 wakeup(&done_ccb->ccb_h.cbfcnp);
1810                 return;
1811         }
1812         }
1813         xpt_release_ccb(done_ccb);
1814 }
1815
1816 /*
1817  * Mount the tape (make sure it's ready for I/O).
1818  */
1819 static int
1820 samount(struct cam_periph *periph, int oflags, dev_t dev)
1821 {
1822         struct  sa_softc *softc;
1823         union   ccb *ccb;
1824         int     error;
1825
1826         /*
1827          * oflags can be checked for 'kind' of open (read-only check) - later
1828          * dev can be checked for a control-mode or compression open - later
1829          */
1830         UNUSED_PARAMETER(oflags);
1831         UNUSED_PARAMETER(dev);
1832
1833
1834         softc = (struct sa_softc *)periph->softc;
1835
1836         /*
1837          * This should determine if something has happend since the last
1838          * open/mount that would invalidate the mount. We do *not* want
1839          * to retry this command- we just want the status. But we only
1840          * do this if we're mounted already- if we're not mounted,
1841          * we don't care about the unit read state and can instead use
1842          * this opportunity to attempt to reserve the tape unit.
1843          */
1844
1845         if (softc->flags & SA_FLAG_TAPE_MOUNTED) {
1846                 ccb = cam_periph_getccb(periph, 1);
1847                 scsi_test_unit_ready(&ccb->csio, 0, sadone,
1848                     MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT);
1849                 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1850                     &softc->device_stats);
1851                 QFRLS(ccb);
1852                 if (error == ENXIO) {
1853                         softc->flags &= ~SA_FLAG_TAPE_MOUNTED;
1854                         scsi_test_unit_ready(&ccb->csio, 0, sadone,
1855                             MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT);
1856                         error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1857                             &softc->device_stats);
1858                         QFRLS(ccb);
1859                 } else if (error) {
1860                         /*
1861                          * We don't need to freeze the tape because we
1862                          * will now attempt to rewind/load it.
1863                          */
1864                         softc->flags &= ~SA_FLAG_TAPE_MOUNTED;
1865                         if (CAM_DEBUGGED(ccb->ccb_h.path, CAM_DEBUG_INFO)) {
1866                                 xpt_print_path(ccb->ccb_h.path);
1867                                 printf("error %d on TUR in samount\n", error);
1868                         }
1869                 }
1870         } else {
1871                 error = sareservereleaseunit(periph, TRUE);
1872                 if (error) {
1873                         return (error);
1874                 }
1875                 ccb = cam_periph_getccb(periph, 1);
1876                 scsi_test_unit_ready(&ccb->csio, 0, sadone,
1877                     MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT);
1878                 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1879                     &softc->device_stats);
1880                 QFRLS(ccb);
1881         }
1882
1883         if ((softc->flags & SA_FLAG_TAPE_MOUNTED) == 0) {
1884                 struct scsi_read_block_limits_data *rblim = NULL;
1885                 int comp_enabled, comp_supported;
1886                 u_int8_t write_protect, guessing = 0;
1887
1888                 /*
1889                  * Clear out old state.
1890                  */
1891                 softc->flags &= ~(SA_FLAG_TAPE_WP|SA_FLAG_TAPE_WRITTEN|
1892                                   SA_FLAG_ERR_PENDING|SA_FLAG_COMP_ENABLED|
1893                                   SA_FLAG_COMP_SUPP|SA_FLAG_COMP_UNSUPP);
1894                 softc->filemarks = 0;
1895
1896                 /*
1897                  * *Very* first off, make sure we're loaded to BOT.
1898                  */
1899                 scsi_load_unload(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, FALSE,
1900                     FALSE, FALSE, 1, SSD_FULL_SIZE, REWIND_TIMEOUT);
1901                 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1902                     &softc->device_stats);
1903                 QFRLS(ccb);
1904
1905                 /*
1906                  * In case this doesn't work, do a REWIND instead
1907                  */
1908                 if (error) {
1909                         scsi_rewind(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG,
1910                             FALSE, SSD_FULL_SIZE, REWIND_TIMEOUT);
1911                         error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1912                                 &softc->device_stats);
1913                         QFRLS(ccb);
1914                 }
1915                 if (error) {
1916                         xpt_release_ccb(ccb);
1917                         goto exit;
1918                 }
1919
1920                 /*
1921                  * Do a dummy test read to force access to the
1922                  * media so that the drive will really know what's
1923                  * there. We actually don't really care what the
1924                  * blocksize on tape is and don't expect to really
1925                  * read a full record.
1926                  */
1927                 rblim = (struct  scsi_read_block_limits_data *)
1928                     malloc(8192, M_TEMP, M_WAITOK);
1929                 if (rblim == NULL) {
1930                         xpt_print_path(ccb->ccb_h.path);
1931                         printf("no memory for test read\n");
1932                         xpt_release_ccb(ccb);
1933                         error = ENOMEM;
1934                         goto exit;
1935                 }
1936
1937                 if ((softc->quirks & SA_QUIRK_NODREAD) == 0) {
1938                         scsi_sa_read_write(&ccb->csio, 0, sadone,
1939                             MSG_SIMPLE_Q_TAG, 1, FALSE, 0, 8192,
1940                             (void *) rblim, 8192, SSD_FULL_SIZE,
1941                             IO_TIMEOUT);
1942                         (void) cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1943                             &softc->device_stats);
1944                         QFRLS(ccb);
1945                         scsi_rewind(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG,
1946                             FALSE, SSD_FULL_SIZE, REWIND_TIMEOUT);
1947                         error = cam_periph_runccb(ccb, saerror, 0,
1948                             SF_NO_PRINT | SF_RETRY_SELTO | SF_RETRY_UA,
1949                             &softc->device_stats);
1950                         QFRLS(ccb);
1951                         if (error) {
1952                                 xpt_print_path(ccb->ccb_h.path);
1953                                 printf("unable to rewind after test read\n");
1954                                 xpt_release_ccb(ccb);
1955                                 goto exit;
1956                         }
1957                 }
1958
1959                 /*
1960                  * Next off, determine block limits.
1961                  */
1962                 scsi_read_block_limits(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG,
1963                     rblim, SSD_FULL_SIZE, SCSIOP_TIMEOUT);
1964
1965                 error = cam_periph_runccb(ccb, saerror, 0,
1966                     SF_NO_PRINT | SF_RETRY_UA | SF_RETRY_SELTO,
1967                     &softc->device_stats);
1968                 QFRLS(ccb);
1969                 xpt_release_ccb(ccb);
1970
1971                 if (error != 0) {
1972                         /*
1973                          * If it's less than SCSI-2, READ BLOCK LIMITS is not
1974                          * a MANDATORY command. Anyway- it doesn't matter-
1975                          * we can proceed anyway.
1976                          */
1977                         softc->blk_gran = 0;
1978                         softc->max_blk = ~0;
1979                         softc->min_blk = 0;
1980                 } else {
1981                         if (softc->scsi_rev >= SCSI_REV_3) {
1982                                 softc->blk_gran = RBL_GRAN(rblim);
1983                         } else {
1984                                 softc->blk_gran = 0;
1985                         }
1986                         /*
1987                          * We take max_blk == min_blk to mean a default to
1988                          * fixed mode- but note that whatever we get out of
1989                          * sagetparams below will actually determine whether
1990                          * we are actually *in* fixed mode.
1991                          */
1992                         softc->max_blk = scsi_3btoul(rblim->maximum);
1993                         softc->min_blk = scsi_2btoul(rblim->minimum);
1994
1995
1996                 }
1997                 /*
1998                  * Next, perform a mode sense to determine
1999                  * current density, blocksize, compression etc.
2000                  */
2001                 error = sagetparams(periph, SA_PARAM_ALL,
2002                                     &softc->media_blksize,
2003                                     &softc->media_density,
2004                                     &softc->media_numblks,
2005                                     &softc->buffer_mode, &write_protect,
2006                                     &softc->speed, &comp_supported,
2007                                     &comp_enabled, &softc->comp_algorithm,
2008                                     NULL);
2009
2010                 if (error != 0) {
2011                         /*
2012                          * We could work a little harder here. We could
2013                          * adjust our attempts to get information. It
2014                          * might be an ancient tape drive. If someone
2015                          * nudges us, we'll do that.
2016                          */
2017                         goto exit;
2018                 }
2019
2020                 /*
2021                  * If no quirk has determined that this is a device that is
2022                  * preferred to be in fixed or variable mode, now is the time
2023                  * to find out.
2024                  */
2025                 if ((softc->quirks & (SA_QUIRK_FIXED|SA_QUIRK_VARIABLE)) == 0) {
2026                         guessing = 1;
2027                         /*
2028                          * This could be expensive to find out. Luckily we
2029                          * only need to do this once. If we start out in
2030                          * 'default' mode, try and set ourselves to one
2031                          * of the densities that would determine a wad
2032                          * of other stuff. Go from highest to lowest.
2033                          */
2034                         if (softc->media_density == SCSI_DEFAULT_DENSITY) {
2035                                 int i;
2036                                 static u_int8_t ctry[] = {
2037                                         SCSI_DENSITY_HALFINCH_PE,
2038                                         SCSI_DENSITY_HALFINCH_6250C,
2039                                         SCSI_DENSITY_HALFINCH_6250,
2040                                         SCSI_DENSITY_HALFINCH_1600,
2041                                         SCSI_DENSITY_HALFINCH_800,
2042                                         SCSI_DENSITY_QIC_4GB,
2043                                         SCSI_DENSITY_QIC_2GB,
2044                                         SCSI_DENSITY_QIC_525_320,
2045                                         SCSI_DENSITY_QIC_150,
2046                                         SCSI_DENSITY_QIC_120,
2047                                         SCSI_DENSITY_QIC_24,
2048                                         SCSI_DENSITY_QIC_11_9TRK,
2049                                         SCSI_DENSITY_QIC_11_4TRK,
2050                                         SCSI_DENSITY_QIC_1320,
2051                                         SCSI_DENSITY_QIC_3080,
2052                                         0
2053                                 };
2054                                 for (i = 0; ctry[i]; i++) {
2055                                         error = sasetparams(periph,
2056                                             SA_PARAM_DENSITY, 0, ctry[i],
2057                                             0, SF_NO_PRINT);
2058                                         if (error == 0) {
2059                                                 softc->media_density = ctry[i];
2060                                                 break;
2061                                         }
2062                                 }
2063                         }
2064                         switch (softc->media_density) {
2065                         case SCSI_DENSITY_QIC_11_4TRK:
2066                         case SCSI_DENSITY_QIC_11_9TRK:
2067                         case SCSI_DENSITY_QIC_24:
2068                         case SCSI_DENSITY_QIC_120:
2069                         case SCSI_DENSITY_QIC_150:
2070                         case SCSI_DENSITY_QIC_525_320:
2071                         case SCSI_DENSITY_QIC_1320:
2072                         case SCSI_DENSITY_QIC_3080:
2073                                 softc->quirks &= ~SA_QUIRK_2FM;
2074                                 softc->quirks |= SA_QUIRK_FIXED|SA_QUIRK_1FM;
2075                                 softc->last_media_blksize = 512;
2076                                 break;
2077                         case SCSI_DENSITY_QIC_4GB:
2078                         case SCSI_DENSITY_QIC_2GB:
2079                                 softc->quirks &= ~SA_QUIRK_2FM;
2080                                 softc->quirks |= SA_QUIRK_FIXED|SA_QUIRK_1FM;
2081                                 softc->last_media_blksize = 1024;
2082                                 break;
2083                         default:
2084                                 softc->last_media_blksize =
2085                                     softc->media_blksize;
2086                                 softc->quirks |= SA_QUIRK_VARIABLE;
2087                                 break;
2088                         }
2089                 }
2090
2091                 /*
2092                  * If no quirk has determined that this is a device that needs
2093                  * to have 2 Filemarks at EOD, now is the time to find out.
2094                  */
2095
2096                 if ((softc->quirks & SA_QUIRK_2FM) == 0) {
2097                         switch (softc->media_density) {
2098                         case SCSI_DENSITY_HALFINCH_800:
2099                         case SCSI_DENSITY_HALFINCH_1600:
2100                         case SCSI_DENSITY_HALFINCH_6250:
2101                         case SCSI_DENSITY_HALFINCH_6250C:
2102                         case SCSI_DENSITY_HALFINCH_PE:
2103                                 softc->quirks &= ~SA_QUIRK_1FM;
2104                                 softc->quirks |= SA_QUIRK_2FM;
2105                                 break;
2106                         default:
2107                                 break;
2108                         }
2109                 }
2110
2111                 /*
2112                  * Now validate that some info we got makes sense.
2113                  */
2114                 if ((softc->max_blk < softc->media_blksize) ||
2115                     (softc->min_blk > softc->media_blksize &&
2116                     softc->media_blksize)) {
2117                         xpt_print_path(ccb->ccb_h.path);
2118                         printf("BLOCK LIMITS (%d..%d) could not match current "
2119                             "block settings (%d)- adjusting\n", softc->min_blk,
2120                             softc->max_blk, softc->media_blksize);
2121                         softc->max_blk = softc->min_blk =
2122                             softc->media_blksize;
2123                 }
2124
2125                 /*
2126                  * Now put ourselves into the right frame of mind based
2127                  * upon quirks...
2128                  */
2129 tryagain:
2130                 /*
2131                  * If we want to be in FIXED mode and our current blocksize
2132                  * is not equal to our last blocksize (if nonzero), try and
2133                  * set ourselves to this last blocksize (as the 'preferred'
2134                  * block size).  The initial quirkmatch at registry sets the
2135                  * initial 'last' blocksize. If, for whatever reason, this
2136                  * 'last' blocksize is zero, set the blocksize to 512,
2137                  * or min_blk if that's larger.
2138                  */
2139                 if ((softc->quirks & SA_QUIRK_FIXED) &&
2140                     (softc->quirks & SA_QUIRK_NO_MODESEL) == 0 &&
2141                     (softc->media_blksize != softc->last_media_blksize)) {
2142                         softc->media_blksize = softc->last_media_blksize;
2143                         if (softc->media_blksize == 0) {
2144                                 softc->media_blksize = 512;
2145                                 if (softc->media_blksize < softc->min_blk) {
2146                                         softc->media_blksize = softc->min_blk;
2147                                 }
2148                         }
2149                         error = sasetparams(periph, SA_PARAM_BLOCKSIZE,
2150                             softc->media_blksize, 0, 0, SF_NO_PRINT);
2151                         if (error) {
2152                                 xpt_print_path(ccb->ccb_h.path);
2153                                 printf("unable to set fixed blocksize to %d\n",
2154                                      softc->media_blksize);
2155                                 goto exit;
2156                         }
2157                 }
2158
2159                 if ((softc->quirks & SA_QUIRK_VARIABLE) &&
2160                     (softc->media_blksize != 0)) {
2161                         softc->last_media_blksize = softc->media_blksize;
2162                         softc->media_blksize = 0;
2163                         error = sasetparams(periph, SA_PARAM_BLOCKSIZE,
2164                             0, 0, 0, SF_NO_PRINT);
2165                         if (error) {
2166                                 /*
2167                                  * If this fails and we were guessing, just
2168                                  * assume that we got it wrong and go try
2169                                  * fixed block mode. Don't even check against
2170                                  * density code at this point.
2171                                  */
2172                                 if (guessing) {
2173                                         softc->quirks &= ~SA_QUIRK_VARIABLE;
2174                                         softc->quirks |= SA_QUIRK_FIXED;
2175                                         if (softc->last_media_blksize == 0)
2176                                                 softc->last_media_blksize = 512;
2177                                         goto tryagain;
2178                                 }
2179                                 xpt_print_path(ccb->ccb_h.path);
2180                                 printf("unable to set variable blocksize\n");
2181                                 goto exit;
2182                         }
2183                 }
2184
2185                 /*
2186                  * Now that we have the current block size,
2187                  * set up some parameters for sastart's usage.
2188                  */
2189                 if (softc->media_blksize) {
2190                         softc->flags |= SA_FLAG_FIXED;
2191                         if (powerof2(softc->media_blksize)) {
2192                                 softc->blk_shift =
2193                                     ffs(softc->media_blksize) - 1;
2194                                 softc->blk_mask = softc->media_blksize - 1;
2195                         } else {
2196                                 softc->blk_mask = ~0;
2197                                 softc->blk_shift = 0;
2198                         }
2199                 } else {
2200                         /*
2201                          * The SCSI-3 spec allows 0 to mean "unspecified".
2202                          * The SCSI-1 spec allows 0 to mean 'infinite'.
2203                          *
2204                          * Either works here.
2205                          */
2206                         if (softc->max_blk == 0) {
2207                                 softc->max_blk = ~0;
2208                         }
2209                         softc->blk_shift = 0;
2210                         if (softc->blk_gran != 0) {
2211                                 softc->blk_mask = softc->blk_gran - 1;
2212                         } else {
2213                                 softc->blk_mask = 0;
2214                         }
2215                 }
2216
2217                 if (write_protect)
2218                         softc->flags |= SA_FLAG_TAPE_WP;
2219
2220                 if (comp_supported) {
2221                         if (softc->saved_comp_algorithm == 0)
2222                                 softc->saved_comp_algorithm =
2223                                     softc->comp_algorithm;
2224                         softc->flags |= SA_FLAG_COMP_SUPP;
2225                         if (comp_enabled)
2226                                 softc->flags |= SA_FLAG_COMP_ENABLED;
2227                 } else
2228                         softc->flags |= SA_FLAG_COMP_UNSUPP;
2229
2230                 if ((softc->buffer_mode == SMH_SA_BUF_MODE_NOBUF) &&
2231                     (softc->quirks & SA_QUIRK_NO_MODESEL) == 0) {
2232                         error = sasetparams(periph, SA_PARAM_BUFF_MODE, 0,
2233                             0, 0, SF_NO_PRINT);
2234                         if (error == 0) {
2235                                 softc->buffer_mode = SMH_SA_BUF_MODE_SIBUF;
2236                         } else {
2237                                 xpt_print_path(ccb->ccb_h.path);
2238                                 printf("unable to set buffered mode\n");
2239                         }
2240                         error = 0;      /* not an error */
2241                 }
2242
2243
2244                 if (error == 0) {
2245                         softc->flags |= SA_FLAG_TAPE_MOUNTED;
2246                 }
2247 exit:
2248                 if (rblim != NULL)
2249                         free(rblim, M_TEMP);
2250
2251                 if (error != 0) {
2252                         softc->dsreg = MTIO_DSREG_NIL;
2253                 } else {
2254                         softc->fileno = softc->blkno = 0;
2255                         softc->dsreg = MTIO_DSREG_REST;
2256                 }
2257 #ifdef  SA_1FM_AT_EOD
2258                 if ((softc->quirks & SA_QUIRK_2FM) == 0)
2259                         softc->quirks |= SA_QUIRK_1FM;
2260 #else
2261                 if ((softc->quirks & SA_QUIRK_1FM) == 0)
2262                         softc->quirks |= SA_QUIRK_2FM;
2263 #endif
2264         } else
2265                 xpt_release_ccb(ccb);
2266
2267         /*
2268          * If we return an error, we're not mounted any more,
2269          * so release any device reservation.
2270          */
2271         if (error != 0) {
2272                 (void) sareservereleaseunit(periph, FALSE);
2273         } else {
2274                 /*
2275                  * Clear I/O residual.
2276                  */
2277                 softc->last_io_resid = 0;
2278                 softc->last_ctl_resid = 0;
2279         }
2280         return (error);
2281 }
2282
2283 /*
2284  * How many filemarks do we need to write if we were to terminate the
2285  * tape session right now? Note that this can be a negative number
2286  */
2287
2288 static int
2289 samarkswanted(struct cam_periph *periph)
2290 {
2291         int     markswanted;
2292         struct  sa_softc *softc;
2293
2294         softc = (struct sa_softc *)periph->softc;
2295         markswanted = 0;
2296         if ((softc->flags & SA_FLAG_TAPE_WRITTEN) != 0) {
2297                 markswanted++;
2298                 if (softc->quirks & SA_QUIRK_2FM)
2299                         markswanted++;
2300         }
2301         markswanted -= softc->filemarks;
2302         return (markswanted);
2303 }
2304
2305 static int
2306 sacheckeod(struct cam_periph *periph)
2307 {
2308         int     error;
2309         int     markswanted;
2310         struct  sa_softc *softc;
2311
2312         softc = (struct sa_softc *)periph->softc;
2313         markswanted = samarkswanted(periph);
2314
2315         if (markswanted > 0) {
2316                 error = sawritefilemarks(periph, markswanted, FALSE);
2317         } else {
2318                 error = 0;
2319         }
2320         return (error);
2321 }
2322
2323 static int
2324 saerror(union ccb *ccb, u_int32_t cflgs, u_int32_t sflgs)
2325 {
2326         static const char *toobig =
2327             "%d-byte tape record bigger than supplied buffer\n";
2328         struct  cam_periph *periph;
2329         struct  sa_softc *softc;
2330         struct  ccb_scsiio *csio;
2331         struct  scsi_sense_data *sense;
2332         u_int32_t resid = 0;
2333         int32_t info = 0;
2334         cam_status status;
2335         int error_code, sense_key, asc, ascq, error, aqvalid;
2336
2337         periph = xpt_path_periph(ccb->ccb_h.path);
2338         softc = (struct sa_softc *)periph->softc;
2339         csio = &ccb->csio;
2340         sense = &csio->sense_data;
2341         scsi_extract_sense(sense, &error_code, &sense_key, &asc, &ascq);
2342         aqvalid = sense->extra_len >= 6;
2343         error = 0;
2344
2345         status = csio->ccb_h.status & CAM_STATUS_MASK;
2346
2347         /*
2348          * Calculate/latch up, any residuals... We do this in a funny 2-step
2349          * so we can print stuff here if we have CAM_DEBUG enabled for this
2350          * unit.
2351          */
2352         if (status == CAM_SCSI_STATUS_ERROR) {
2353                 if ((sense->error_code & SSD_ERRCODE_VALID) != 0) {
2354                         info = (int32_t) scsi_4btoul(sense->info);
2355                         resid = info;
2356                         if ((softc->flags & SA_FLAG_FIXED) != 0)
2357                                 resid *= softc->media_blksize;
2358                 } else {
2359                         resid = csio->dxfer_len;
2360                         info = resid;
2361                         if ((softc->flags & SA_FLAG_FIXED) != 0) {
2362                                 if (softc->media_blksize)
2363                                         info /= softc->media_blksize;
2364                         }
2365                 }
2366                 if (CCB_Type(csio) == SA_CCB_BUFFER_IO) {
2367                         bcopy((caddr_t) sense, (caddr_t) &softc->last_io_sense,
2368                             sizeof (struct scsi_sense_data));
2369                         bcopy(csio->cdb_io.cdb_bytes, softc->last_io_cdb,
2370                             (int) csio->cdb_len);
2371                         softc->last_io_resid = resid;
2372                         softc->last_resid_was_io = 1;
2373                 } else {
2374                         bcopy((caddr_t) sense, (caddr_t) &softc->last_ctl_sense,
2375                             sizeof (struct scsi_sense_data));
2376                         bcopy(csio->cdb_io.cdb_bytes, softc->last_ctl_cdb,
2377                             (int) csio->cdb_len);
2378                         softc->last_ctl_resid = resid;
2379                         softc->last_resid_was_io = 0;
2380                 }
2381                 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, ("CDB[0]=0x%x Key 0x%x "
2382                     "ASC/ASCQ 0x%x/0x%x CAM STATUS 0x%x flags 0x%x resid %d "
2383                     "dxfer_len %d\n", csio->cdb_io.cdb_bytes[0] & 0xff,
2384                     sense_key, asc, ascq, status,
2385                     sense->flags & ~SSD_KEY_RESERVED, resid, csio->dxfer_len));
2386         } else {
2387                 CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
2388                     ("Cam Status 0x%x\n", status));
2389         }
2390
2391         switch (status) {
2392         case CAM_REQ_CMP:
2393                 return (0);
2394         case CAM_SCSI_STATUS_ERROR:
2395                 /*
2396                  * If a read/write command, we handle it here.
2397                  */
2398                 if (CCB_Type(csio) != SA_CCB_WAITING) {
2399                         break;
2400                 }
2401                 /*
2402                  * If this was just EOM/EOP, Filemark, Setmark or ILI detected
2403                  * on a non read/write command, we assume it's not an error
2404                  * and propagate the residule and return.
2405                  */
2406                 if ((aqvalid && asc == 0 && ascq > 0 && ascq <= 5) ||
2407                     (aqvalid == 0 && sense_key == SSD_KEY_NO_SENSE)) {
2408                         csio->resid = resid;
2409                         QFRLS(ccb);
2410                         return (0);
2411                 }
2412                 /*
2413                  * Otherwise, we let the common code handle this.
2414                  */
2415                 return (cam_periph_error(ccb, cflgs, sflgs, &softc->saved_ccb));
2416
2417         /*
2418          * XXX: To Be Fixed
2419          * We cannot depend upon CAM honoring retry counts for these.
2420          */
2421         case CAM_SCSI_BUS_RESET:
2422         case CAM_BDR_SENT:
2423                 if (ccb->ccb_h.retry_count <= 0) {
2424                         return (EIO);
2425                         break;
2426                 }
2427                 /* FALLTHROUGH */
2428         default:
2429                 return (cam_periph_error(ccb, cflgs, sflgs, &softc->saved_ccb));
2430         }
2431
2432         /*
2433          * Handle filemark, end of tape, mismatched record sizes....
2434          * From this point out, we're only handling read/write cases.
2435          * Handle writes && reads differently.
2436          */
2437
2438         if (csio->cdb_io.cdb_bytes[0] == SA_WRITE) {
2439                 if (sense_key == SSD_KEY_VOLUME_OVERFLOW) {
2440                         csio->resid = resid;
2441                         error = ENOSPC;
2442                 } else if (sense->flags & SSD_EOM) {
2443                         softc->flags |= SA_FLAG_EOM_PENDING;
2444                         /*
2445                          * Grotesque as it seems, the few times
2446                          * I've actually seen a non-zero resid,
2447                          * the tape drive actually lied and had
2448                          * writtent all the data!.
2449                          */
2450                         csio->resid = 0;
2451                 }
2452         } else {
2453                 csio->resid = resid;
2454                 if (sense_key == SSD_KEY_BLANK_CHECK) {
2455                         if (softc->quirks & SA_QUIRK_1FM) {
2456                                 error = 0;
2457                                 softc->flags |= SA_FLAG_EOM_PENDING;
2458                         } else {
2459                                 error = EIO;
2460                         }
2461                 } else if (sense->flags & SSD_FILEMARK) {
2462                         if (softc->flags & SA_FLAG_FIXED) {
2463                                 error = -1;
2464                                 softc->flags |= SA_FLAG_EOF_PENDING;
2465                         }
2466                         /*
2467                          * Unconditionally, if we detected a filemark on a read,
2468                          * mark that we've run moved a file ahead.
2469                          */
2470                         if (softc->fileno != (daddr_t) -1) {
2471                                 softc->fileno++;
2472                                 softc->blkno = 0;
2473                                 csio->ccb_h.ccb_pflags |= SA_POSITION_UPDATED;
2474                         }
2475                 }
2476         }
2477
2478         /*
2479          * Incorrect Length usually applies to read, but can apply to writes.
2480          */
2481         if (error == 0 && (sense->flags & SSD_ILI)) {
2482                 if (info < 0) {
2483                         xpt_print_path(csio->ccb_h.path);
2484                         printf(toobig, csio->dxfer_len - info);
2485                         csio->resid = csio->dxfer_len;
2486                         error = EIO;
2487                 } else {
2488                         csio->resid = resid;
2489                         if (softc->flags & SA_FLAG_FIXED) {
2490                                 softc->flags |= SA_FLAG_EIO_PENDING;
2491                         }
2492                         /*
2493                          * Bump the block number if we hadn't seen a filemark.
2494                          * Do this independent of errors (we've moved anyway).
2495                          */
2496                         if ((sense->flags & SSD_FILEMARK) == 0) {
2497                                 if (softc->blkno != (daddr_t) -1) {
2498                                         softc->blkno++;
2499                                         csio->ccb_h.ccb_pflags |=
2500                                            SA_POSITION_UPDATED;
2501                                 }
2502                         }
2503                 }
2504         }
2505
2506         if (error <= 0) {
2507                 /*
2508                  * Unfreeze the queue if frozen as we're not returning anything
2509                  * to our waiters that would indicate an I/O error has occurred
2510                  * (yet).
2511                  */
2512                 QFRLS(ccb);
2513                 error = 0;
2514         }
2515         return (error);
2516 }
2517
2518 static int
2519 sagetparams(struct cam_periph *periph, sa_params params_to_get,
2520             u_int32_t *blocksize, u_int8_t *density, u_int32_t *numblocks,
2521             int *buff_mode, u_int8_t *write_protect, u_int8_t *speed,
2522             int *comp_supported, int *comp_enabled, u_int32_t *comp_algorithm,
2523             sa_comp_t *tcs)
2524 {
2525         union ccb *ccb;
2526         void *mode_buffer;
2527         struct scsi_mode_header_6 *mode_hdr;
2528         struct scsi_mode_blk_desc *mode_blk;
2529         int mode_buffer_len;
2530         struct sa_softc *softc;
2531         u_int8_t cpage;
2532         int error;
2533         cam_status status;
2534
2535         softc = (struct sa_softc *)periph->softc;
2536         ccb = cam_periph_getccb(periph, 1);
2537         if (softc->quirks & SA_QUIRK_NO_CPAGE)
2538                 cpage = SA_DEVICE_CONFIGURATION_PAGE;
2539         else
2540                 cpage = SA_DATA_COMPRESSION_PAGE;
2541
2542 retry:
2543         mode_buffer_len = sizeof(*mode_hdr) + sizeof(*mode_blk);
2544
2545         if (params_to_get & SA_PARAM_COMPRESSION) {
2546                 if (softc->quirks & SA_QUIRK_NOCOMP) {
2547                         *comp_supported = FALSE;
2548                         params_to_get &= ~SA_PARAM_COMPRESSION;
2549                 } else
2550                         mode_buffer_len += sizeof (sa_comp_t);
2551         }
2552
2553         mode_buffer = malloc(mode_buffer_len, M_TEMP, M_WAITOK);
2554         bzero(mode_buffer, mode_buffer_len);
2555         mode_hdr = (struct scsi_mode_header_6 *)mode_buffer;
2556         mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1];
2557
2558         /* it is safe to retry this */
2559         scsi_mode_sense(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, FALSE,
2560             SMS_PAGE_CTRL_CURRENT, (params_to_get & SA_PARAM_COMPRESSION) ?
2561             cpage : SMS_VENDOR_SPECIFIC_PAGE, mode_buffer, mode_buffer_len,
2562             SSD_FULL_SIZE, SCSIOP_TIMEOUT);
2563
2564         error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
2565             &softc->device_stats);
2566         QFRLS(ccb);
2567
2568         status = ccb->ccb_h.status & CAM_STATUS_MASK;
2569
2570         if (error == EINVAL && (params_to_get & SA_PARAM_COMPRESSION) != 0) {
2571                 /*
2572                  * Hmm. Let's see if we can try another page...
2573                  * If we've already done that, give up on compression
2574                  * for this device and remember this for the future
2575                  * and attempt the request without asking for compression
2576                  * info.
2577                  */
2578                 if (cpage == SA_DATA_COMPRESSION_PAGE) {
2579                         cpage = SA_DEVICE_CONFIGURATION_PAGE;
2580                         goto retry;
2581                 }
2582                 softc->quirks |= SA_QUIRK_NOCOMP;
2583                 free(mode_buffer, M_TEMP);
2584                 goto retry;
2585         } else if (status == CAM_SCSI_STATUS_ERROR) {
2586                 /* Tell the user about the fatal error. */
2587                 scsi_sense_print(&ccb->csio);
2588                 goto sagetparamsexit;
2589         }
2590
2591         /*
2592          * If the user only wants the compression information, and
2593          * the device doesn't send back the block descriptor, it's
2594          * no big deal.  If the user wants more than just
2595          * compression, though, and the device doesn't pass back the
2596          * block descriptor, we need to send another mode sense to
2597          * get the block descriptor.
2598          */
2599         if ((mode_hdr->blk_desc_len == 0) &&
2600             (params_to_get & SA_PARAM_COMPRESSION) &&
2601             (params_to_get & ~(SA_PARAM_COMPRESSION))) {
2602
2603                 /*
2604                  * Decrease the mode buffer length by the size of
2605                  * the compression page, to make sure the data
2606                  * there doesn't get overwritten.
2607                  */
2608                 mode_buffer_len -= sizeof (sa_comp_t);
2609
2610                 /*
2611                  * Now move the compression page that we presumably
2612                  * got back down the memory chunk a little bit so
2613                  * it doesn't get spammed.
2614                  */
2615                 bcopy(&mode_hdr[0], &mode_hdr[1], sizeof (sa_comp_t));
2616                 bzero(&mode_hdr[0], sizeof (mode_hdr[0]));
2617
2618                 /*
2619                  * Now, we issue another mode sense and just ask
2620                  * for the block descriptor, etc.
2621                  */
2622
2623                 scsi_mode_sense(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, FALSE,
2624                     SMS_PAGE_CTRL_CURRENT, SMS_VENDOR_SPECIFIC_PAGE,
2625                     mode_buffer, mode_buffer_len, SSD_FULL_SIZE,
2626                     SCSIOP_TIMEOUT);
2627
2628                 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
2629                     &softc->device_stats);
2630                 QFRLS(ccb);
2631
2632                 if (error != 0)
2633                         goto sagetparamsexit;
2634         }
2635
2636         if (params_to_get & SA_PARAM_BLOCKSIZE)
2637                 *blocksize = scsi_3btoul(mode_blk->blklen);
2638
2639         if (params_to_get & SA_PARAM_NUMBLOCKS)
2640                 *numblocks = scsi_3btoul(mode_blk->nblocks);
2641
2642         if (params_to_get & SA_PARAM_BUFF_MODE)
2643                 *buff_mode = mode_hdr->dev_spec & SMH_SA_BUF_MODE_MASK;
2644
2645         if (params_to_get & SA_PARAM_DENSITY)
2646                 *density = mode_blk->density;
2647
2648         if (params_to_get & SA_PARAM_WP)
2649                 *write_protect = (mode_hdr->dev_spec & SMH_SA_WP)? TRUE : FALSE;
2650
2651         if (params_to_get & SA_PARAM_SPEED)
2652                 *speed = mode_hdr->dev_spec & SMH_SA_SPEED_MASK;
2653
2654         if (params_to_get & SA_PARAM_COMPRESSION) {
2655                 sa_comp_t *ntcs = (sa_comp_t *) &mode_blk[1];
2656                 if (cpage == SA_DATA_COMPRESSION_PAGE) {
2657                         struct scsi_data_compression_page *cp = &ntcs->dcomp;
2658                         *comp_supported =
2659                             (cp->dce_and_dcc & SA_DCP_DCC)? TRUE : FALSE;
2660                         *comp_enabled =
2661                             (cp->dce_and_dcc & SA_DCP_DCE)? TRUE : FALSE;
2662                         *comp_algorithm = scsi_4btoul(cp->comp_algorithm);
2663                 } else {
2664                         struct scsi_dev_conf_page *cp = &ntcs->dconf;
2665                         /*
2666                          * We don't really know whether this device supports
2667                          * Data Compression if the the algorithm field is
2668                          * zero. Just say we do.
2669                          */
2670                         *comp_supported = TRUE;
2671                         *comp_enabled =
2672                             (cp->sel_comp_alg != SA_COMP_NONE)? TRUE : FALSE;
2673                         *comp_algorithm = cp->sel_comp_alg;
2674                 }
2675                 if (tcs != NULL)
2676                         bcopy(ntcs, tcs, sizeof (sa_comp_t));
2677         }
2678
2679         if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
2680                 int idx;
2681                 char *xyz = mode_buffer;
2682                 xpt_print_path(periph->path);
2683                 printf("Mode Sense Data=");
2684                 for (idx = 0; idx < mode_buffer_len; idx++)
2685                         printf(" 0x%02x", xyz[idx] & 0xff);
2686                 printf("\n");
2687         }
2688
2689 sagetparamsexit:
2690
2691         xpt_release_ccb(ccb);
2692         free(mode_buffer, M_TEMP);
2693         return (error);
2694 }
2695
2696 /*
2697  * The purpose of this function is to set one of four different parameters
2698  * for a tape drive:
2699  *      - blocksize
2700  *      - density
2701  *      - compression / compression algorithm
2702  *      - buffering mode
2703  *
2704  * The assumption is that this will be called from saioctl(), and therefore
2705  * from a process context.  Thus the waiting malloc calls below.  If that
2706  * assumption ever changes, the malloc calls should be changed to be
2707  * NOWAIT mallocs.
2708  *
2709  * Any or all of the four parameters may be set when this function is
2710  * called.  It should handle setting more than one parameter at once.
2711  */
2712 static int
2713 sasetparams(struct cam_periph *periph, sa_params params_to_set,
2714             u_int32_t blocksize, u_int8_t density, u_int32_t calg,
2715             u_int32_t sense_flags)
2716 {
2717         struct sa_softc *softc;
2718         u_int32_t current_blocksize;
2719         u_int32_t current_calg;
2720         u_int8_t current_density;
2721         u_int8_t current_speed;
2722         int comp_enabled, comp_supported;
2723         void *mode_buffer;
2724         int mode_buffer_len;
2725         struct scsi_mode_header_6 *mode_hdr;
2726         struct scsi_mode_blk_desc *mode_blk;
2727         sa_comp_t *ccomp, *cpage;
2728         int buff_mode;
2729         union ccb *ccb = NULL;
2730         int error;
2731
2732         softc = (struct sa_softc *)periph->softc;
2733
2734         ccomp = malloc(sizeof (sa_comp_t), M_TEMP, M_WAITOK);
2735
2736         /*
2737          * Since it doesn't make sense to set the number of blocks, or
2738          * write protection, we won't try to get the current value.  We
2739          * always want to get the blocksize, so we can set it back to the
2740          * proper value.
2741          */
2742         error = sagetparams(periph,
2743             params_to_set | SA_PARAM_BLOCKSIZE | SA_PARAM_SPEED,
2744             &current_blocksize, &current_density, NULL, &buff_mode, NULL,
2745             &current_speed, &comp_supported, &comp_enabled,
2746             &current_calg, ccomp);
2747
2748         if (error != 0) {
2749                 free(ccomp, M_TEMP);
2750                 return (error);
2751         }
2752
2753         mode_buffer_len = sizeof(*mode_hdr) + sizeof(*mode_blk);
2754         if (params_to_set & SA_PARAM_COMPRESSION)
2755                 mode_buffer_len += sizeof (sa_comp_t);
2756
2757         mode_buffer = malloc(mode_buffer_len, M_TEMP, M_WAITOK);
2758         bzero(mode_buffer, mode_buffer_len);
2759
2760         mode_hdr = (struct scsi_mode_header_6 *)mode_buffer;
2761         mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1];
2762
2763         ccb = cam_periph_getccb(periph, 1);
2764
2765 retry:
2766
2767         if (params_to_set & SA_PARAM_COMPRESSION) {
2768                 if (mode_blk) {
2769                         cpage = (sa_comp_t *)&mode_blk[1];
2770                 } else {
2771                         cpage = (sa_comp_t *)&mode_hdr[1];
2772                 }
2773                 bcopy(ccomp, cpage, sizeof (sa_comp_t));
2774                 cpage->hdr.pagecode &= ~0x80;
2775         } else
2776                 cpage = NULL;
2777
2778         /*
2779          * If the caller wants us to set the blocksize, use the one they
2780          * pass in.  Otherwise, use the blocksize we got back from the
2781          * mode select above.
2782          */
2783         if (mode_blk) {
2784                 if (params_to_set & SA_PARAM_BLOCKSIZE)
2785                         scsi_ulto3b(blocksize, mode_blk->blklen);
2786                 else
2787                         scsi_ulto3b(current_blocksize, mode_blk->blklen);
2788
2789                 /*
2790                  * Set density if requested, else preserve old density.
2791                  * SCSI_SAME_DENSITY only applies to SCSI-2 or better
2792                  * devices, else density we've latched up in our softc.
2793                  */
2794                 if (params_to_set & SA_PARAM_DENSITY) {
2795                         mode_blk->density = density;
2796                 } else if (softc->scsi_rev > SCSI_REV_CCS) {
2797                         mode_blk->density = SCSI_SAME_DENSITY;
2798                 } else {
2799                         mode_blk->density = softc->media_density;
2800                 }
2801         }
2802
2803         /*
2804          * For mode selects, these two fields must be zero.
2805          */
2806         mode_hdr->data_length = 0;
2807         mode_hdr->medium_type = 0;
2808
2809         /* set the speed to the current value */
2810         mode_hdr->dev_spec = current_speed;
2811
2812         /* set single-initiator buffering mode */
2813         mode_hdr->dev_spec |= SMH_SA_BUF_MODE_SIBUF;
2814
2815         if (mode_blk)
2816                 mode_hdr->blk_desc_len = sizeof(struct scsi_mode_blk_desc);
2817         else
2818                 mode_hdr->blk_desc_len = 0;
2819
2820         /*
2821          * First, if the user wants us to set the compression algorithm or
2822          * just turn compression on, check to make sure that this drive
2823          * supports compression.
2824          */
2825         if (params_to_set & SA_PARAM_COMPRESSION) {
2826                 /*
2827                  * If the compression algorithm is 0, disable compression.
2828                  * If the compression algorithm is non-zero, enable
2829                  * compression and set the compression type to the
2830                  * specified compression algorithm, unless the algorithm is
2831                  * MT_COMP_ENABLE.  In that case, we look at the
2832                  * compression algorithm that is currently set and if it is
2833                  * non-zero, we leave it as-is.  If it is zero, and we have
2834                  * saved a compression algorithm from a time when
2835                  * compression was enabled before, set the compression to
2836                  * the saved value.
2837                  */
2838                 switch (ccomp->hdr.pagecode & ~0x80) {
2839                 case SA_DATA_COMPRESSION_PAGE:
2840                 if (ccomp->dcomp.dce_and_dcc & SA_DCP_DCC) {
2841                         struct scsi_data_compression_page *dcp = &cpage->dcomp;
2842                         if (calg == 0) {
2843                                 /*
2844                                  * Disable compression, but leave the
2845                                  * decompression and the capability bit
2846                                  * alone.
2847                                  */
2848                                 dcp->dce_and_dcc = SA_DCP_DCC;
2849                                 dcp->dde_and_red |= SA_DCP_DDE;
2850                                 break;
2851                         }
2852                         /* enable compression && decompression */
2853                         dcp->dce_and_dcc = SA_DCP_DCE | SA_DCP_DCC;
2854                         dcp->dde_and_red |= SA_DCP_DDE;
2855                         /*
2856                          * If there, use compression algorithm from caller.
2857                          * Otherwise, if there's a saved compression algorithm
2858                          * and there is no current algorithm, use the saved
2859                          * algorithm. Else parrot back what we got and hope
2860                          * for the best.
2861                          */
2862                         if (calg != MT_COMP_ENABLE) {
2863                                 scsi_ulto4b(calg, dcp->comp_algorithm);
2864                                 scsi_ulto4b(calg, dcp->decomp_algorithm);
2865                         } else if (scsi_4btoul(dcp->comp_algorithm) == 0 &&
2866                             softc->saved_comp_algorithm != 0) {
2867                                 scsi_ulto4b(softc->saved_comp_algorithm,
2868                                     dcp->comp_algorithm);
2869                                 scsi_ulto4b(softc->saved_comp_algorithm,
2870                                     dcp->decomp_algorithm);
2871                         }
2872                         break;
2873                 }
2874                 case SA_DEVICE_CONFIGURATION_PAGE:
2875                 {
2876                         struct scsi_dev_conf_page *dcp = &cpage->dconf;
2877                         if (calg == 0) {
2878                                 dcp->sel_comp_alg = SA_COMP_NONE;
2879                                 break;
2880                         }
2881                         if (calg != MT_COMP_ENABLE) {
2882                                 dcp->sel_comp_alg = calg;
2883                         } else if (dcp->sel_comp_alg == SA_COMP_NONE &&
2884                             softc->saved_comp_algorithm != 0) {
2885                                 dcp->sel_comp_alg = softc->saved_comp_algorithm;
2886                         }
2887                         break;
2888                 }
2889                 default:
2890                         /*
2891                          * The drive doesn't seem to support compression,
2892                          * so turn off the set compression bit.
2893                          */
2894                         params_to_set &= ~SA_PARAM_COMPRESSION;
2895                         xpt_print_path(periph->path);
2896                         printf("device does not seem to support compression\n");
2897
2898                         /*
2899                          * If that was the only thing the user wanted us to set,
2900                          * clean up allocated resources and return with
2901                          * 'operation not supported'.
2902                          */
2903                         if (params_to_set == SA_PARAM_NONE) {
2904                                 free(mode_buffer, M_TEMP);
2905                                 xpt_release_ccb(ccb);
2906                                 return (ENODEV);
2907                         }
2908
2909                         /*
2910                          * That wasn't the only thing the user wanted us to set.
2911                          * So, decrease the stated mode buffer length by the
2912                          * size of the compression mode page.
2913                          */
2914                         mode_buffer_len -= sizeof(sa_comp_t);
2915                 }
2916         }
2917
2918         /* It is safe to retry this operation */
2919         scsi_mode_select(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG,
2920             (params_to_set & SA_PARAM_COMPRESSION)? TRUE : FALSE,
2921             FALSE, mode_buffer, mode_buffer_len, SSD_FULL_SIZE, SCSIOP_TIMEOUT);
2922
2923         error = cam_periph_runccb(ccb, saerror, 0,
2924             sense_flags, &softc->device_stats);
2925         QFRLS(ccb);
2926
2927         if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
2928                 int idx;
2929                 char *xyz = mode_buffer;
2930                 xpt_print_path(periph->path);
2931                 printf("Err%d, Mode Select Data=", error);
2932                 for (idx = 0; idx < mode_buffer_len; idx++)
2933                         printf(" 0x%02x", xyz[idx] & 0xff);
2934                 printf("\n");
2935         }
2936
2937
2938         if (error) {
2939                 /*
2940                  * If we can, try without setting density/blocksize.
2941                  */
2942                 if (mode_blk) {
2943                         if ((params_to_set &
2944                             (SA_PARAM_DENSITY|SA_PARAM_BLOCKSIZE)) == 0) {
2945                                 mode_blk = NULL;
2946                                 goto retry;
2947                         }
2948                 } else {
2949                         mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1];
2950                         cpage = (sa_comp_t *)&mode_blk[1];
2951                 }
2952
2953                 /*
2954                  * If we were setting the blocksize, and that failed, we
2955                  * want to set it to its original value.  If we weren't
2956                  * setting the blocksize, we don't want to change it.
2957                  */
2958                 scsi_ulto3b(current_blocksize, mode_blk->blklen);
2959
2960                 /*
2961                  * Set density if requested, else preserve old density.
2962                  * SCSI_SAME_DENSITY only applies to SCSI-2 or better
2963                  * devices, else density we've latched up in our softc.
2964                  */
2965                 if (params_to_set & SA_PARAM_DENSITY) {
2966                         mode_blk->density = current_density;
2967                 } else if (softc->scsi_rev > SCSI_REV_CCS) {
2968                         mode_blk->density = SCSI_SAME_DENSITY;
2969                 } else {
2970                         mode_blk->density = softc->media_density;
2971                 }
2972
2973                 if (params_to_set & SA_PARAM_COMPRESSION)
2974                         bcopy(ccomp, cpage, sizeof (sa_comp_t));
2975
2976                 /*
2977                  * The retry count is the only CCB field that might have been
2978                  * changed that we care about, so reset it back to 1.
2979                  */
2980                 ccb->ccb_h.retry_count = 1;
2981                 cam_periph_runccb(ccb, saerror, 0, sense_flags,
2982                     &softc->device_stats);
2983                 QFRLS(ccb);
2984         }
2985
2986         xpt_release_ccb(ccb);
2987
2988         if (ccomp != NULL)
2989                 free(ccomp, M_TEMP);
2990
2991         if (params_to_set & SA_PARAM_COMPRESSION) {
2992                 if (error) {
2993                         softc->flags &= ~SA_FLAG_COMP_ENABLED;
2994                         /*
2995                          * Even if we get an error setting compression,
2996                          * do not say that we don't support it. We could
2997                          * have been wrong, or it may be media specific.
2998                          *      softc->flags &= ~SA_FLAG_COMP_SUPP;
2999                          */
3000                         softc->saved_comp_algorithm = softc->comp_algorithm;
3001                         softc->comp_algorithm = 0;
3002                 } else {
3003                         softc->flags |= SA_FLAG_COMP_ENABLED;
3004                         softc->comp_algorithm = calg;
3005                 }
3006         }
3007
3008         free(mode_buffer, M_TEMP);
3009         return (error);
3010 }
3011
3012 static void
3013 saprevent(struct cam_periph *periph, int action)
3014 {
3015         struct  sa_softc *softc;
3016         union   ccb *ccb;
3017         int     error, sf;
3018
3019         softc = (struct sa_softc *)periph->softc;
3020
3021         if ((action == PR_ALLOW) && (softc->flags & SA_FLAG_TAPE_LOCKED) == 0)
3022                 return;
3023         if ((action == PR_PREVENT) && (softc->flags & SA_FLAG_TAPE_LOCKED) != 0)
3024                 return;
3025
3026         /*
3027          * We can be quiet about illegal requests.
3028          */
3029         if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
3030                 sf = 0;
3031         } else
3032                 sf = SF_QUIET_IR;
3033
3034         ccb = cam_periph_getccb(periph, 1);
3035
3036         /* It is safe to retry this operation */
3037         scsi_prevent(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, action,
3038             SSD_FULL_SIZE, SCSIOP_TIMEOUT);
3039
3040         error = cam_periph_runccb(ccb, saerror, 0, sf, &softc->device_stats);
3041         QFRLS(ccb);
3042         if (error == 0) {
3043                 if (action == PR_ALLOW)
3044                         softc->flags &= ~SA_FLAG_TAPE_LOCKED;
3045                 else
3046                         softc->flags |= SA_FLAG_TAPE_LOCKED;
3047         }
3048
3049         xpt_release_ccb(ccb);
3050 }
3051
3052 static int
3053 sarewind(struct cam_periph *periph)
3054 {
3055         union   ccb *ccb;
3056         struct  sa_softc *softc;
3057         int     error;
3058
3059         softc = (struct sa_softc *)periph->softc;
3060
3061         ccb = cam_periph_getccb(periph, 1);
3062
3063         /* It is safe to retry this operation */
3064         scsi_rewind(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, FALSE,
3065             SSD_FULL_SIZE, REWIND_TIMEOUT);
3066
3067         softc->dsreg = MTIO_DSREG_REW;
3068         error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats);
3069         softc->dsreg = MTIO_DSREG_REST;
3070
3071         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3072                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE);
3073
3074         xpt_release_ccb(ccb);
3075         if (error == 0)
3076                 softc->fileno = softc->blkno = (daddr_t) 0;
3077         else
3078                 softc->fileno = softc->blkno = (daddr_t) -1;
3079         return (error);
3080 }
3081
3082 static int
3083 saspace(struct cam_periph *periph, int count, scsi_space_code code)
3084 {
3085         union   ccb *ccb;
3086         struct  sa_softc *softc;
3087         int     error;
3088
3089         softc = (struct sa_softc *)periph->softc;
3090
3091         ccb = cam_periph_getccb(periph, 1);
3092
3093         /* This cannot be retried */
3094
3095         scsi_space(&ccb->csio, 0, sadone, MSG_SIMPLE_Q_TAG, code, count,
3096             SSD_FULL_SIZE, SPACE_TIMEOUT);
3097
3098         /*
3099          * Clear residual because we will be using it.
3100          */
3101         softc->last_ctl_resid = 0;
3102
3103         softc->dsreg = (count < 0)? MTIO_DSREG_REV : MTIO_DSREG_FWD;
3104         error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats);
3105         softc->dsreg = MTIO_DSREG_REST;
3106
3107         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3108                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE);
3109
3110         xpt_release_ccb(ccb);
3111
3112         /*
3113          * If a spacing operation has failed, we need to invalidate
3114          * this mount.
3115          *
3116          * If the spacing operation was setmarks or to end of recorded data,
3117          * we no longer know our relative position.
3118          *
3119          * If the spacing operations was spacing files in reverse, we
3120          * take account of the residual, but still check against less
3121          * than zero- if we've gone negative, we must have hit BOT.
3122          *
3123          * If the spacing operations was spacing records in reverse and
3124          * we have a residual, we've either hit BOT or hit a filemark.
3125          * In the former case, we know our new record number (0). In
3126          * the latter case, we have absolutely no idea what the real
3127          * record number is- we've stopped between the end of the last
3128          * record in the previous file and the filemark that stopped
3129          * our spacing backwards.
3130          */
3131         if (error) {
3132                 softc->fileno = softc->blkno = (daddr_t) -1;
3133         } else if (code == SS_SETMARKS || code == SS_EOD) {
3134                 softc->fileno = softc->blkno = (daddr_t) -1;
3135         } else if (code == SS_FILEMARKS && softc->fileno != (daddr_t) -1) {
3136                 softc->fileno += (count - softc->last_ctl_resid);
3137                 if (softc->fileno < 0)  /* we must of hit BOT */
3138                         softc->fileno = 0;
3139                 softc->blkno = 0;
3140         } else if (code == SS_BLOCKS && softc->blkno != (daddr_t) -1) {
3141                 softc->blkno += (count - softc->last_ctl_resid);
3142                 if (count < 0) {
3143                         if (softc->last_ctl_resid || softc->blkno < 0) {
3144                                 if (softc->fileno == 0) {
3145                                         softc->blkno = 0;
3146                                 } else {
3147                                         softc->blkno = (daddr_t) -1;
3148                                 }
3149                         }
3150                 }
3151         }
3152         return (error);
3153 }
3154
3155 static int
3156 sawritefilemarks(struct cam_periph *periph, int nmarks, int setmarks)
3157 {
3158         union   ccb *ccb;
3159         struct  sa_softc *softc;
3160         int     error, nwm = 0;
3161
3162         softc = (struct sa_softc *)periph->softc;
3163
3164         ccb = cam_periph_getccb(periph, 1);
3165         /*
3166          * Clear residual because we will be using it.
3167          */
3168         softc->last_ctl_resid = 0;
3169
3170         softc->dsreg = MTIO_DSREG_FMK;
3171         /* this *must* not be retried */
3172         scsi_write_filemarks(&ccb->csio, 0, sadone, MSG_SIMPLE_Q_TAG,
3173             FALSE, setmarks, nmarks, SSD_FULL_SIZE, IO_TIMEOUT);
3174         softc->dsreg = MTIO_DSREG_REST;
3175
3176
3177         error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats);
3178
3179         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3180                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE);
3181
3182         if (error == 0 && nmarks) {
3183                 struct sa_softc *softc = (struct sa_softc *)periph->softc;
3184                 nwm = nmarks - softc->last_ctl_resid;
3185                 softc->filemarks += nwm;
3186         }
3187
3188         xpt_release_ccb(ccb);
3189
3190         /*
3191          * Update relative positions (if we're doing that).
3192          */
3193         if (error) {
3194                 softc->fileno = softc->blkno = (daddr_t) -1;
3195         } else if (softc->fileno != (daddr_t) -1) {
3196                 softc->fileno += nwm;
3197                 softc->blkno = 0;
3198         }
3199         return (error);
3200 }
3201
3202 static int
3203 sardpos(struct cam_periph *periph, int hard, u_int32_t *blkptr)
3204 {
3205         struct scsi_tape_position_data loc;
3206         union ccb *ccb;
3207         struct sa_softc *softc = (struct sa_softc *)periph->softc;
3208         int error;
3209
3210         /*
3211          * We try and flush any buffered writes here if we were writing
3212          * and we're trying to get hardware block position. It eats
3213          * up performance substantially, but I'm wary of drive firmware.
3214          *
3215          * I think that *logical* block position is probably okay-
3216          * but hardware block position might have to wait for data
3217          * to hit media to be valid. Caveat Emptor.
3218          */
3219
3220         if (hard && (softc->flags & SA_FLAG_TAPE_WRITTEN)) {
3221                 error = sawritefilemarks(periph, 0, 0);
3222                 if (error && error != EACCES)
3223                         return (error);
3224         }
3225
3226         ccb = cam_periph_getccb(periph, 1);
3227         scsi_read_position(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG,
3228             hard, &loc, SSD_FULL_SIZE, SCSIOP_TIMEOUT);
3229         softc->dsreg = MTIO_DSREG_RBSY;
3230         error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats);
3231         softc->dsreg = MTIO_DSREG_REST;
3232         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3233                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, 0);
3234
3235         if (error == 0) {
3236                 if (loc.flags & SA_RPOS_UNCERTAIN) {
3237                         error = EINVAL;         /* nothing is certain */
3238                 } else {
3239                         *blkptr = scsi_4btoul(loc.firstblk);
3240                 }
3241         }
3242
3243         xpt_release_ccb(ccb);
3244         return (error);
3245 }
3246
3247 static int
3248 sasetpos(struct cam_periph *periph, int hard, u_int32_t *blkptr)
3249 {
3250         union ccb *ccb;
3251         struct sa_softc *softc;
3252         int error;
3253
3254         /*
3255          * We used to try and flush any buffered writes here.
3256          * Now we push this onto user applications to either
3257          * flush the pending writes themselves (via a zero count
3258          * WRITE FILEMARKS command) or they can trust their tape
3259          * drive to do this correctly for them.
3260          */
3261
3262         softc = (struct sa_softc *)periph->softc;
3263         ccb = cam_periph_getccb(periph, 1);
3264
3265
3266         scsi_set_position(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG,
3267             hard, *blkptr, SSD_FULL_SIZE, SPACE_TIMEOUT);
3268
3269
3270         softc->dsreg = MTIO_DSREG_POS;
3271         error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats);
3272         softc->dsreg = MTIO_DSREG_REST;
3273         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3274                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, 0);
3275         xpt_release_ccb(ccb);
3276         /*
3277          * Note relative file && block number position as now unknown.
3278          */
3279         softc->fileno = softc->blkno = (daddr_t) -1;
3280         return (error);
3281 }
3282
3283 static int
3284 saretension(struct cam_periph *periph)
3285 {
3286         union ccb *ccb;
3287         struct sa_softc *softc;
3288         int error;
3289
3290         softc = (struct sa_softc *)periph->softc;
3291
3292         ccb = cam_periph_getccb(periph, 1);
3293
3294         /* It is safe to retry this operation */
3295         scsi_load_unload(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, FALSE,
3296             FALSE, TRUE,  TRUE, SSD_FULL_SIZE, ERASE_TIMEOUT);
3297
3298         softc->dsreg = MTIO_DSREG_TEN;
3299         error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats);
3300         softc->dsreg = MTIO_DSREG_REST;
3301
3302         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3303                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE);
3304         xpt_release_ccb(ccb);
3305         if (error == 0)
3306                 softc->fileno = softc->blkno = (daddr_t) 0;
3307         else
3308                 softc->fileno = softc->blkno = (daddr_t) -1;
3309         return (error);
3310 }
3311
3312 static int
3313 sareservereleaseunit(struct cam_periph *periph, int reserve)
3314 {
3315         union ccb *ccb;
3316         struct sa_softc *softc;
3317         int error;
3318
3319         softc = (struct sa_softc *)periph->softc;
3320         ccb = cam_periph_getccb(periph,  1);
3321
3322         /* It is safe to retry this operation */
3323         scsi_reserve_release_unit(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG,
3324             FALSE,  0, SSD_FULL_SIZE,  SCSIOP_TIMEOUT, reserve);
3325         softc->dsreg = MTIO_DSREG_RBSY;
3326         error = cam_periph_runccb(ccb, saerror, 0,
3327             SF_RETRY_UA | SF_NO_PRINT, &softc->device_stats);
3328         softc->dsreg = MTIO_DSREG_REST;
3329         QFRLS(ccb);
3330         xpt_release_ccb(ccb);
3331
3332         /*
3333          * If the error was Illegal Request, then the device doesn't support
3334          * RESERVE/RELEASE. This is not an error.
3335          */
3336         if (error == EINVAL) {
3337                 error = 0;
3338         }
3339
3340         return (error);
3341 }
3342
3343 static int
3344 saloadunload(struct cam_periph *periph, int load)
3345 {
3346         union   ccb *ccb;
3347         struct  sa_softc *softc;
3348         int     error;
3349
3350         softc = (struct sa_softc *)periph->softc;
3351
3352         ccb = cam_periph_getccb(periph, 1);
3353
3354         /* It is safe to retry this operation */
3355         scsi_load_unload(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, FALSE,
3356             FALSE, FALSE, load, SSD_FULL_SIZE, REWIND_TIMEOUT);
3357
3358         softc->dsreg = (load)? MTIO_DSREG_LD : MTIO_DSREG_UNL;
3359         error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats);
3360         softc->dsreg = MTIO_DSREG_REST;
3361         QFRLS(ccb);
3362         xpt_release_ccb(ccb);
3363
3364         if (error || load == 0)
3365                 softc->fileno = softc->blkno = (daddr_t) -1;
3366         else if (error == 0)
3367                 softc->fileno = softc->blkno = (daddr_t) 0;
3368         return (error);
3369 }
3370
3371 static int
3372 saerase(struct cam_periph *periph, int longerase)
3373 {
3374
3375         union   ccb *ccb;
3376         struct  sa_softc *softc;
3377         int error;
3378
3379         softc = (struct sa_softc *)periph->softc;
3380
3381         ccb = cam_periph_getccb(periph, 1);
3382
3383         scsi_erase(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG, FALSE, longerase,
3384             SSD_FULL_SIZE, ERASE_TIMEOUT);
3385
3386         softc->dsreg = MTIO_DSREG_ZER;
3387         error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats);
3388         softc->dsreg = MTIO_DSREG_REST;
3389
3390         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3391                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE);
3392         xpt_release_ccb(ccb);
3393         return (error);
3394 }
3395
3396 #endif /* _KERNEL */
3397
3398 /*
3399  * Read tape block limits command.
3400  */
3401 void
3402 scsi_read_block_limits(struct ccb_scsiio *csio, u_int32_t retries,
3403                    void (*cbfcnp)(struct cam_periph *, union ccb *),
3404                    u_int8_t tag_action,
3405                    struct scsi_read_block_limits_data *rlimit_buf,
3406                    u_int8_t sense_len, u_int32_t timeout)
3407 {
3408         struct scsi_read_block_limits *scsi_cmd;
3409
3410         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_IN, tag_action,
3411              (u_int8_t *)rlimit_buf, sizeof(*rlimit_buf), sense_len,
3412              sizeof(*scsi_cmd), timeout);
3413
3414         scsi_cmd = (struct scsi_read_block_limits *)&csio->cdb_io.cdb_bytes;
3415         bzero(scsi_cmd, sizeof(*scsi_cmd));
3416         scsi_cmd->opcode = READ_BLOCK_LIMITS;
3417 }
3418
3419 void
3420 scsi_sa_read_write(struct ccb_scsiio *csio, u_int32_t retries,
3421                    void (*cbfcnp)(struct cam_periph *, union ccb *),
3422                    u_int8_t tag_action, int readop, int sli,
3423                    int fixed, u_int32_t length, u_int8_t *data_ptr,
3424                    u_int32_t dxfer_len, u_int8_t sense_len, u_int32_t timeout)
3425 {
3426         struct scsi_sa_rw *scsi_cmd;
3427
3428         scsi_cmd = (struct scsi_sa_rw *)&csio->cdb_io.cdb_bytes;
3429         scsi_cmd->opcode = readop ? SA_READ : SA_WRITE;
3430         scsi_cmd->sli_fixed = 0;
3431         if (sli && readop)
3432                 scsi_cmd->sli_fixed |= SAR_SLI;
3433         if (fixed)
3434                 scsi_cmd->sli_fixed |= SARW_FIXED;
3435         scsi_ulto3b(length, scsi_cmd->length);
3436         scsi_cmd->control = 0;
3437
3438         cam_fill_csio(csio, retries, cbfcnp, readop ? CAM_DIR_IN : CAM_DIR_OUT,
3439             tag_action, data_ptr, dxfer_len, sense_len,
3440             sizeof(*scsi_cmd), timeout);
3441 }
3442
3443 void
3444 scsi_load_unload(struct ccb_scsiio *csio, u_int32_t retries,
3445                  void (*cbfcnp)(struct cam_periph *, union ccb *),
3446                  u_int8_t tag_action, int immediate, int eot,
3447                  int reten, int load, u_int8_t sense_len,
3448                  u_int32_t timeout)
3449 {
3450         struct scsi_load_unload *scsi_cmd;
3451
3452         scsi_cmd = (struct scsi_load_unload *)&csio->cdb_io.cdb_bytes;
3453         bzero(scsi_cmd, sizeof(*scsi_cmd));
3454         scsi_cmd->opcode = LOAD_UNLOAD;
3455         if (immediate)
3456                 scsi_cmd->immediate = SLU_IMMED;
3457         if (eot)
3458                 scsi_cmd->eot_reten_load |= SLU_EOT;
3459         if (reten)
3460                 scsi_cmd->eot_reten_load |= SLU_RETEN;
3461         if (load)
3462                 scsi_cmd->eot_reten_load |= SLU_LOAD;
3463
3464         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action,
3465             NULL, 0, sense_len, sizeof(*scsi_cmd), timeout);
3466 }
3467
3468 void
3469 scsi_rewind(struct ccb_scsiio *csio, u_int32_t retries,
3470             void (*cbfcnp)(struct cam_periph *, union ccb *),
3471             u_int8_t tag_action, int immediate, u_int8_t sense_len,
3472             u_int32_t timeout)
3473 {
3474         struct scsi_rewind *scsi_cmd;
3475
3476         scsi_cmd = (struct scsi_rewind *)&csio->cdb_io.cdb_bytes;
3477         bzero(scsi_cmd, sizeof(*scsi_cmd));
3478         scsi_cmd->opcode = REWIND;
3479         if (immediate)
3480                 scsi_cmd->immediate = SREW_IMMED;
3481
3482         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
3483             0, sense_len, sizeof(*scsi_cmd), timeout);
3484 }
3485
3486 void
3487 scsi_space(struct ccb_scsiio *csio, u_int32_t retries,
3488            void (*cbfcnp)(struct cam_periph *, union ccb *),
3489            u_int8_t tag_action, scsi_space_code code,
3490            u_int32_t count, u_int8_t sense_len, u_int32_t timeout)
3491 {
3492         struct scsi_space *scsi_cmd;
3493
3494         scsi_cmd = (struct scsi_space *)&csio->cdb_io.cdb_bytes;
3495         scsi_cmd->opcode = SPACE;
3496         scsi_cmd->code = code;
3497         scsi_ulto3b(count, scsi_cmd->count);
3498         scsi_cmd->control = 0;
3499
3500         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
3501             0, sense_len, sizeof(*scsi_cmd), timeout);
3502 }
3503
3504 void
3505 scsi_write_filemarks(struct ccb_scsiio *csio, u_int32_t retries,
3506                      void (*cbfcnp)(struct cam_periph *, union ccb *),
3507                      u_int8_t tag_action, int immediate, int setmark,
3508                      u_int32_t num_marks, u_int8_t sense_len,
3509                      u_int32_t timeout)
3510 {
3511         struct scsi_write_filemarks *scsi_cmd;
3512
3513         scsi_cmd = (struct scsi_write_filemarks *)&csio->cdb_io.cdb_bytes;
3514         bzero(scsi_cmd, sizeof(*scsi_cmd));
3515         scsi_cmd->opcode = WRITE_FILEMARKS;
3516         if (immediate)
3517                 scsi_cmd->byte2 |= SWFMRK_IMMED;
3518         if (setmark)
3519                 scsi_cmd->byte2 |= SWFMRK_WSMK;
3520
3521         scsi_ulto3b(num_marks, scsi_cmd->num_marks);
3522
3523         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
3524             0, sense_len, sizeof(*scsi_cmd), timeout);
3525 }
3526
3527 /*
3528  * The reserve and release unit commands differ only by their opcodes.
3529  */
3530 void
3531 scsi_reserve_release_unit(struct ccb_scsiio *csio, u_int32_t retries,
3532                           void (*cbfcnp)(struct cam_periph *, union ccb *),
3533                           u_int8_t tag_action, int third_party,
3534                           int third_party_id, u_int8_t sense_len,
3535                           u_int32_t timeout, int reserve)
3536 {
3537         struct scsi_reserve_release_unit *scsi_cmd;
3538
3539         scsi_cmd = (struct scsi_reserve_release_unit *)&csio->cdb_io.cdb_bytes;
3540         bzero(scsi_cmd, sizeof(*scsi_cmd));
3541
3542         if (reserve)
3543                 scsi_cmd->opcode = RESERVE_UNIT;
3544         else
3545                 scsi_cmd->opcode = RELEASE_UNIT;
3546
3547         if (third_party) {
3548                 scsi_cmd->lun_thirdparty |= SRRU_3RD_PARTY;
3549                 scsi_cmd->lun_thirdparty |=
3550                         ((third_party_id << SRRU_3RD_SHAMT) & SRRU_3RD_MASK);
3551         }
3552
3553         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
3554             0, sense_len, sizeof(*scsi_cmd), timeout);
3555 }
3556
3557 void
3558 scsi_erase(struct ccb_scsiio *csio, u_int32_t retries,
3559            void (*cbfcnp)(struct cam_periph *, union ccb *),
3560            u_int8_t tag_action, int immediate, int long_erase,
3561            u_int8_t sense_len, u_int32_t timeout)
3562 {
3563         struct scsi_erase *scsi_cmd;
3564
3565         scsi_cmd = (struct scsi_erase *)&csio->cdb_io.cdb_bytes;
3566         bzero(scsi_cmd, sizeof(*scsi_cmd));
3567
3568         scsi_cmd->opcode = ERASE;
3569
3570         if (immediate)
3571                 scsi_cmd->lun_imm_long |= SE_IMMED;
3572
3573         if (long_erase)
3574                 scsi_cmd->lun_imm_long |= SE_LONG;
3575
3576         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
3577             0, sense_len, sizeof(*scsi_cmd), timeout);
3578 }
3579
3580 /*
3581  * Read Tape Position command.
3582  */
3583 void
3584 scsi_read_position(struct ccb_scsiio *csio, u_int32_t retries,
3585                    void (*cbfcnp)(struct cam_periph *, union ccb *),
3586                    u_int8_t tag_action, int hardsoft,
3587                    struct scsi_tape_position_data *sbp,
3588                    u_int8_t sense_len, u_int32_t timeout)
3589 {
3590         struct scsi_tape_read_position *scmd;
3591
3592         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_IN, tag_action,
3593             (u_int8_t *)sbp, sizeof (*sbp), sense_len, sizeof(*scmd), timeout);
3594         scmd = (struct scsi_tape_read_position *)&csio->cdb_io.cdb_bytes;
3595         bzero(scmd, sizeof(*scmd));
3596         scmd->opcode = READ_POSITION;
3597         scmd->byte1 = hardsoft;
3598 }
3599
3600 /*
3601  * Set Tape Position command.
3602  */
3603 void
3604 scsi_set_position(struct ccb_scsiio *csio, u_int32_t retries,
3605                    void (*cbfcnp)(struct cam_periph *, union ccb *),
3606                    u_int8_t tag_action, int hardsoft, u_int32_t blkno,
3607                    u_int8_t sense_len, u_int32_t timeout)
3608 {
3609         struct scsi_tape_locate *scmd;
3610
3611         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action,
3612             (u_int8_t *)NULL, 0, sense_len, sizeof(*scmd), timeout);
3613         scmd = (struct scsi_tape_locate *)&csio->cdb_io.cdb_bytes;
3614         bzero(scmd, sizeof(*scmd));
3615         scmd->opcode = LOCATE;
3616         if (hardsoft)
3617                 scmd->byte1 |= SA_SPOS_BT;
3618         scsi_ulto4b(blkno, scmd->blkaddr);
3619 }