sys/cam/scsi/scsi_sa.c

   1 /*-
   2  * Implementation of SCSI Sequential Access Peripheral driver for CAM.
   3  *
   4  * Copyright (c) 1999, 2000 Matthew Jacob
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions, and the following disclaimer,
  12  *    without modification, immediately at the beginning of the file.
  13  * 2. The name of the author may not be used to endorse or promote products
  14  *    derived from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  20  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 #include <sys/cdefs.h>
  30 __FBSDID("$FreeBSD$");
  31
  32 #include <sys/param.h>
  33 #include <sys/queue.h>
  34 #ifdef _KERNEL
  35 #include <sys/systm.h>
  36 #include <sys/kernel.h>
  37 #endif
  38 #include <sys/types.h>
  39 #include <sys/time.h>
  40 #include <sys/bio.h>
  41 #include <sys/limits.h>
  42 #include <sys/malloc.h>
  43 #include <sys/mtio.h>
  44 #ifdef _KERNEL
  45 #include <sys/conf.h>
  46 #endif
  47 #include <sys/fcntl.h>
  48 #include <sys/devicestat.h>
  49
  50 #ifndef _KERNEL
  51 #include <stdio.h>
  52 #include <string.h>
  53 #endif
  54
  55 #include <cam/cam.h>
  56 #include <cam/cam_ccb.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 static MALLOC_DEFINE(M_SCSISA, "SCSI sa", "SCSI sequential access buffers");
 106
 107 typedef enum {
 108         SA_STATE_NORMAL, SA_STATE_ABNORMAL
 109 } sa_state;
 110
 111 #define ccb_pflags      ppriv_field0
 112 #define ccb_bp          ppriv_ptr1
 113
 114 #define SA_CCB_BUFFER_IO        0x0
 115 #define SA_CCB_WAITING          0x1
 116 #define SA_CCB_TYPEMASK         0x1
 117 #define SA_POSITION_UPDATED     0x2
 118
 119 #define Set_CCB_Type(x, type)                           \
 120         x->ccb_h.ccb_pflags &= ~SA_CCB_TYPEMASK;        \
 121         x->ccb_h.ccb_pflags |= type
 122
 123 #define CCB_Type(x)     (x->ccb_h.ccb_pflags & SA_CCB_TYPEMASK)
 124
 125
 126
 127 typedef enum {
 128         SA_FLAG_OPEN            = 0x0001,
 129         SA_FLAG_FIXED           = 0x0002,
 130         SA_FLAG_TAPE_LOCKED     = 0x0004,
 131         SA_FLAG_TAPE_MOUNTED    = 0x0008,
 132         SA_FLAG_TAPE_WP         = 0x0010,
 133         SA_FLAG_TAPE_WRITTEN    = 0x0020,
 134         SA_FLAG_EOM_PENDING     = 0x0040,
 135         SA_FLAG_EIO_PENDING     = 0x0080,
 136         SA_FLAG_EOF_PENDING     = 0x0100,
 137         SA_FLAG_ERR_PENDING     = (SA_FLAG_EOM_PENDING|SA_FLAG_EIO_PENDING|
 138                                    SA_FLAG_EOF_PENDING),
 139         SA_FLAG_INVALID         = 0x0200,
 140         SA_FLAG_COMP_ENABLED    = 0x0400,
 141         SA_FLAG_COMP_SUPP       = 0x0800,
 142         SA_FLAG_COMP_UNSUPP     = 0x1000,
 143         SA_FLAG_TAPE_FROZEN     = 0x2000
 144 } sa_flags;
 145
 146 typedef enum {
 147         SA_MODE_REWIND          = 0x00,
 148         SA_MODE_NOREWIND        = 0x01,
 149         SA_MODE_OFFLINE         = 0x02
 150 } sa_mode;
 151
 152 typedef enum {
 153         SA_PARAM_NONE           = 0x00,
 154         SA_PARAM_BLOCKSIZE      = 0x01,
 155         SA_PARAM_DENSITY        = 0x02,
 156         SA_PARAM_COMPRESSION    = 0x04,
 157         SA_PARAM_BUFF_MODE      = 0x08,
 158         SA_PARAM_NUMBLOCKS      = 0x10,
 159         SA_PARAM_WP             = 0x20,
 160         SA_PARAM_SPEED          = 0x40,
 161         SA_PARAM_ALL            = 0x7f
 162 } sa_params;
 163
 164 typedef enum {
 165         SA_QUIRK_NONE           = 0x00,
 166         SA_QUIRK_NOCOMP         = 0x01, /* Can't deal with compression at all */
 167         SA_QUIRK_FIXED          = 0x02, /* Force fixed mode */
 168         SA_QUIRK_VARIABLE       = 0x04, /* Force variable mode */
 169         SA_QUIRK_2FM            = 0x08, /* Needs Two File Marks at EOD */
 170         SA_QUIRK_1FM            = 0x10, /* No more than 1 File Mark at EOD */
 171         SA_QUIRK_NODREAD        = 0x20, /* Don't try and dummy read density */
 172         SA_QUIRK_NO_MODESEL     = 0x40, /* Don't do mode select at all */
 173         SA_QUIRK_NO_CPAGE       = 0x80  /* Don't use DEVICE COMPRESSION page */
 174 } sa_quirks;
 175
 176 #define SAMODE(z)       (dev2unit(z) & 0x3)
 177 #define SADENSITY(z)    ((dev2unit(z) >> 2) & 0x3)
 178 #define SA_IS_CTRL(z)   (dev2unit(z) & (1 << 4))
 179
 180 #define SA_NOT_CTLDEV   0
 181 #define SA_CTLDEV       1
 182
 183 #define SA_ATYPE_R      0
 184 #define SA_ATYPE_NR     1
 185 #define SA_ATYPE_ER     2
 186
 187 #define SAMINOR(ctl, mode, access) \
 188         ((ctl << 4) | (mode << 2) | (access & 0x3))
 189
 190 #define SA_NUM_MODES    4
 191 struct sa_devs {
 192         struct cdev *ctl_dev;
 193         struct sa_mode_devs {
 194                 struct cdev *r_dev;
 195                 struct cdev *nr_dev;
 196                 struct cdev *er_dev;
 197         } mode_devs[SA_NUM_MODES];
 198 };
 199
 200 struct sa_softc {
 201         sa_state        state;
 202         sa_flags        flags;
 203         sa_quirks       quirks;
 204         struct          bio_queue_head bio_queue;
 205         int             queue_count;
 206         struct          devstat *device_stats;
 207         struct sa_devs  devs;
 208         int             blk_gran;
 209         int             blk_mask;
 210         int             blk_shift;
 211         u_int32_t       max_blk;
 212         u_int32_t       min_blk;
 213         u_int32_t       comp_algorithm;
 214         u_int32_t       saved_comp_algorithm;
 215         u_int32_t       media_blksize;
 216         u_int32_t       last_media_blksize;
 217         u_int32_t       media_numblks;
 218         u_int8_t        media_density;
 219         u_int8_t        speed;
 220         u_int8_t        scsi_rev;
 221         u_int8_t        dsreg;          /* mtio mt_dsreg, redux */
 222         int             buffer_mode;
 223         int             filemarks;
 224         union           ccb saved_ccb;
 225         int             last_resid_was_io;
 226
 227         /*
 228          * Relative to BOT Location.
 229          */
 230         daddr_t         fileno;
 231         daddr_t         blkno;
 232
 233         /*
 234          * Latched Error Info
 235          */
 236         struct {
 237                 struct scsi_sense_data _last_io_sense;
 238                 u_int64_t _last_io_resid;
 239                 u_int8_t _last_io_cdb[CAM_MAX_CDBLEN];
 240                 struct scsi_sense_data _last_ctl_sense;
 241                 u_int64_t _last_ctl_resid;
 242                 u_int8_t _last_ctl_cdb[CAM_MAX_CDBLEN];
 243 #define last_io_sense   errinfo._last_io_sense
 244 #define last_io_resid   errinfo._last_io_resid
 245 #define last_io_cdb     errinfo._last_io_cdb
 246 #define last_ctl_sense  errinfo._last_ctl_sense
 247 #define last_ctl_resid  errinfo._last_ctl_resid
 248 #define last_ctl_cdb    errinfo._last_ctl_cdb
 249         } errinfo;
 250         /*
 251          * Misc other flags/state
 252          */
 253         u_int32_t
 254                                         : 29,
 255                 open_rdonly             : 1,    /* open read-only */
 256                 open_pending_mount      : 1,    /* open pending mount */
 257                 ctrl_mode               : 1;    /* control device open */
 258 };
 259
 260 struct sa_quirk_entry {
 261         struct scsi_inquiry_pattern inq_pat;    /* matching pattern */
 262         sa_quirks quirks;       /* specific quirk type */
 263         u_int32_t prefblk;      /* preferred blocksize when in fixed mode */
 264 };
 265
 266 static struct sa_quirk_entry sa_quirk_table[] =
 267 {
 268         {
 269                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "OnStream",
 270                   "ADR*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_NODREAD |
 271                    SA_QUIRK_1FM|SA_QUIRK_NO_MODESEL, 32768
 272         },
 273         {
 274                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
 275                   "Python 06408*", "*"}, SA_QUIRK_NODREAD, 0
 276         },
 277         {
 278                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
 279                   "Python 25601*", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_NODREAD, 0
 280         },
 281         {
 282                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
 283                   "Python*", "*"}, SA_QUIRK_NODREAD, 0
 284         },
 285         {
 286                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
 287                   "VIPER 150*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512
 288         },
 289         {
 290                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
 291                   "VIPER 2525 25462", "-011"},
 292                   SA_QUIRK_NOCOMP|SA_QUIRK_1FM|SA_QUIRK_NODREAD, 0
 293         },
 294         {
 295                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
 296                   "VIPER 2525*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 1024
 297         },
 298 #if     0
 299         {
 300                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
 301                   "C15*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_NO_CPAGE, 0,
 302         },
 303 #endif
 304         {
 305                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
 306                   "C56*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0
 307         },
 308         {
 309                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
 310                   "T20*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512
 311         },
 312         {
 313                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
 314                   "T4000*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512
 315         },
 316         {
 317                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
 318                   "HP-88780*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0
 319         },
 320         {
 321                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "KENNEDY",
 322                   "*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0
 323         },
 324         {
 325                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "M4 DATA",
 326                   "123107 SCSI*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0
 327         },
 328         {       /* jreynold@primenet.com */
 329                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "Seagate",
 330                 "STT8000N*", "*"}, SA_QUIRK_1FM, 0
 331         },
 332         {       /* mike@sentex.net */
 333                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "Seagate",
 334                 "STT20000*", "*"}, SA_QUIRK_1FM, 0
 335         },
 336         {
 337                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "SEAGATE",
 338                 "DAT    06241-XXX", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0
 339         },
 340         {
 341                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
 342                   " TDC 3600", "U07:"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512
 343         },
 344         {
 345                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
 346                   " TDC 3800", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512
 347         },
 348         {
 349                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
 350                   " TDC 4100", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512
 351         },
 352         {
 353                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
 354                   " TDC 4200", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512
 355         },
 356         {
 357                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
 358                   " SLR*", "*"}, SA_QUIRK_1FM, 0
 359         },
 360         {
 361                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "WANGTEK",
 362                   "5525ES*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512
 363         },
 364         {
 365                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "WANGTEK",
 366                   "51000*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 1024
 367         }
 368 };
 369
 370 static  d_open_t        saopen;
 371 static  d_close_t       saclose;
 372 static  d_strategy_t    sastrategy;
 373 static  d_ioctl_t       saioctl;
 374 static  periph_init_t   sainit;
 375 static  periph_ctor_t   saregister;
 376 static  periph_oninv_t  saoninvalidate;
 377 static  periph_dtor_t   sacleanup;
 378 static  periph_start_t  sastart;
 379 static  void            saasync(void *callback_arg, u_int32_t code,
 380                                 struct cam_path *path, void *arg);
 381 static  void            sadone(struct cam_periph *periph,
 382                                union ccb *start_ccb);
 383 static  int             saerror(union ccb *ccb, u_int32_t cam_flags,
 384                                 u_int32_t sense_flags);
 385 static int              samarkswanted(struct cam_periph *);
 386 static int              sacheckeod(struct cam_periph *periph);
 387 static int              sagetparams(struct cam_periph *periph,
 388                                     sa_params params_to_get,
 389                                     u_int32_t *blocksize, u_int8_t *density,
 390                                     u_int32_t *numblocks, int *buff_mode,
 391                                     u_int8_t *write_protect, u_int8_t *speed,
 392                                     int *comp_supported, int *comp_enabled,
 393                                     u_int32_t *comp_algorithm,
 394                                     sa_comp_t *comp_page);
 395 static int              sasetparams(struct cam_periph *periph,
 396                                     sa_params params_to_set,
 397                                     u_int32_t blocksize, u_int8_t density,
 398                                     u_int32_t comp_algorithm,
 399                                     u_int32_t sense_flags);
 400 static void             saprevent(struct cam_periph *periph, int action);
 401 static int              sarewind(struct cam_periph *periph);
 402 static int              saspace(struct cam_periph *periph, int count,
 403                                 scsi_space_code code);
 404 static int              samount(struct cam_periph *, int, struct cdev *);
 405 static int              saretension(struct cam_periph *periph);
 406 static int              sareservereleaseunit(struct cam_periph *periph,
 407                                              int reserve);
 408 static int              saloadunload(struct cam_periph *periph, int load);
 409 static int              saerase(struct cam_periph *periph, int longerase);
 410 static int              sawritefilemarks(struct cam_periph *periph,
 411                                          int nmarks, int setmarks);
 412 static int              sardpos(struct cam_periph *periph, int, u_int32_t *);
 413 static int              sasetpos(struct cam_periph *periph, int, u_int32_t *);
 414
 415
 416 static struct periph_driver sadriver =
 417 {
 418         sainit, "sa",
 419         TAILQ_HEAD_INITIALIZER(sadriver.units), /* generation */ 0
 420 };
 421
 422 PERIPHDRIVER_DECLARE(sa, sadriver);
 423
 424 /* For 2.2-stable support */
 425 #ifndef D_TAPE
 426 #define D_TAPE 0
 427 #endif
 428
 429
 430 static struct cdevsw sa_cdevsw = {
 431         .d_version =    D_VERSION,
 432         .d_open =       saopen,
 433         .d_close =      saclose,
 434         .d_read =       physread,
 435         .d_write =      physwrite,
 436         .d_ioctl =      saioctl,
 437         .d_strategy =   sastrategy,
 438         .d_name =       "sa",
 439         .d_flags =      D_TAPE | D_NEEDGIANT,
 440 };
 441
 442 static int
 443 saopen(struct cdev *dev, int flags, int fmt, struct thread *td)
 444 {
 445         struct cam_periph *periph;
 446         struct sa_softc *softc;
 447         int error;
 448
 449         periph = (struct cam_periph *)dev->si_drv1;
 450         if (cam_periph_acquire(periph) != CAM_REQ_CMP) {
 451                 return (ENXIO);
 452         }
 453
 454         cam_periph_lock(periph);
 455
 456         softc = (struct sa_softc *)periph->softc;
 457
 458         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE|CAM_DEBUG_INFO,
 459             ("saopen(%s): softc=0x%x\n", devtoname(dev), softc->flags));
 460
 461         if (SA_IS_CTRL(dev)) {
 462                 softc->ctrl_mode = 1;
 463                 cam_periph_unlock(periph);
 464                 return (0);
 465         }
 466
 467         if ((error = cam_periph_hold(periph, PRIBIO|PCATCH)) != 0) {
 468                 cam_periph_unlock(periph);
 469                 cam_periph_release(periph);
 470                 return (error);
 471         }
 472
 473         if (softc->flags & SA_FLAG_OPEN) {
 474                 error = EBUSY;
 475         } else if (softc->flags & SA_FLAG_INVALID) {
 476                 error = ENXIO;
 477         } else {
 478                 /*
 479                  * Preserve whether this is a read_only open.
 480                  */
 481                 softc->open_rdonly = (flags & O_RDWR) == O_RDONLY;
 482
 483                 /*
 484                  * The function samount ensures media is loaded and ready.
 485                  * It also does a device RESERVE if the tape isn't yet mounted.
 486                  *
 487                  * If the mount fails and this was a non-blocking open,
 488                  * make this a 'open_pending_mount' action.
 489                  */
 490                 error = samount(periph, flags, dev);
 491                 if (error && (flags & O_NONBLOCK)) {
 492                         softc->flags |= SA_FLAG_OPEN;
 493                         softc->open_pending_mount = 1;
 494                         cam_periph_unhold(periph);
 495                         cam_periph_unlock(periph);
 496                         return (0);
 497                 }
 498         }
 499
 500         if (error) {
 501                 cam_periph_unhold(periph);
 502                 cam_periph_unlock(periph);
 503                 cam_periph_release(periph);
 504                 return (error);
 505         }
 506
 507         saprevent(periph, PR_PREVENT);
 508         softc->flags |= SA_FLAG_OPEN;
 509
 510         cam_periph_unhold(periph);
 511         cam_periph_unlock(periph);
 512         return (error);
 513 }
 514
 515 static int
 516 saclose(struct cdev *dev, int flag, int fmt, struct thread *td)
 517 {
 518         struct  cam_periph *periph;
 519         struct  sa_softc *softc;
 520         int     mode, error, writing, tmp;
 521         int     closedbits = SA_FLAG_OPEN;
 522
 523         mode = SAMODE(dev);
 524         periph = (struct cam_periph *)dev->si_drv1;
 525         if (periph == NULL)
 526                 return (ENXIO);
 527
 528         cam_periph_lock(periph);
 529
 530         softc = (struct sa_softc *)periph->softc;
 531
 532         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE|CAM_DEBUG_INFO,
 533             ("saclose(%s): softc=0x%x\n", devtoname(dev), softc->flags));
 534
 535
 536         softc->open_rdonly = 0;
 537         if (SA_IS_CTRL(dev)) {
 538                 softc->ctrl_mode = 0;
 539                 cam_periph_unlock(periph);
 540                 cam_periph_release(periph);
 541                 return (0);
 542         }
 543
 544         if (softc->open_pending_mount) {
 545                 softc->flags &= ~SA_FLAG_OPEN;
 546                 softc->open_pending_mount = 0;
 547                 cam_periph_unlock(periph);
 548                 cam_periph_release(periph);
 549                 return (0);
 550         }
 551
 552         if ((error = cam_periph_hold(periph, PRIBIO)) != 0) {
 553                 cam_periph_unlock(periph);
 554                 return (error);
 555         }
 556
 557         /*
 558          * Were we writing the tape?
 559          */
 560         writing = (softc->flags & SA_FLAG_TAPE_WRITTEN) != 0;
 561
 562         /*
 563          * See whether or not we need to write filemarks. If this
 564          * fails, we probably have to assume we've lost tape
 565          * position.
 566          */
 567         error = sacheckeod(periph);
 568         if (error) {
 569                 xpt_print(periph->path,
 570                     "failed to write terminating filemark(s)\n");
 571                 softc->flags |= SA_FLAG_TAPE_FROZEN;
 572         }
 573
 574         /*
 575          * Whatever we end up doing, allow users to eject tapes from here on.
 576          */
 577         saprevent(periph, PR_ALLOW);
 578
 579         /*
 580          * Decide how to end...
 581          */
 582         if ((softc->flags & SA_FLAG_TAPE_MOUNTED) == 0) {
 583                 closedbits |= SA_FLAG_TAPE_FROZEN;
 584         } else switch (mode) {
 585         case SA_MODE_OFFLINE:
 586                 /*
 587                  * An 'offline' close is an unconditional release of
 588                  * frozen && mount conditions, irrespective of whether
 589                  * these operations succeeded. The reason for this is
 590                  * to allow at least some kind of programmatic way
 591                  * around our state getting all fouled up. If somebody
 592                  * issues an 'offline' command, that will be allowed
 593                  * to clear state.
 594                  */
 595                 (void) sarewind(periph);
 596                 (void) saloadunload(periph, FALSE);
 597                 closedbits |= SA_FLAG_TAPE_MOUNTED|SA_FLAG_TAPE_FROZEN;
 598                 break;
 599         case SA_MODE_REWIND:
 600                 /*
 601                  * If the rewind fails, return an error- if anyone cares,
 602                  * but not overwriting any previous error.
 603                  *
 604                  * We don't clear the notion of mounted here, but we do
 605                  * clear the notion of frozen if we successfully rewound.
 606                  */
 607                 tmp = sarewind(periph);
 608                 if (tmp) {
 609                         if (error != 0)
 610                                 error = tmp;
 611                 } else {
 612                         closedbits |= SA_FLAG_TAPE_FROZEN;
 613                 }
 614                 break;
 615         case SA_MODE_NOREWIND:
 616                 /*
 617                  * If we're not rewinding/unloading the tape, find out
 618                  * whether we need to back up over one of two filemarks
 619                  * we wrote (if we wrote two filemarks) so that appends
 620                  * from this point on will be sane.
 621                  */
 622                 if (error == 0 && writing && (softc->quirks & SA_QUIRK_2FM)) {
 623                         tmp = saspace(periph, -1, SS_FILEMARKS);
 624                         if (tmp) {
 625                                 xpt_print(periph->path, "unable to backspace "
 626                                     "over one of double filemarks at end of "
 627                                     "tape\n");
 628                                 xpt_print(periph->path, "it is possible that "
 629                                     "this device needs a SA_QUIRK_1FM quirk set"
 630                                     "for it\n");
 631                                 softc->flags |= SA_FLAG_TAPE_FROZEN;
 632                         }
 633                 }
 634                 break;
 635         default:
 636                 xpt_print(periph->path, "unknown mode 0x%x in saclose\n", mode);
 637                 /* NOTREACHED */
 638                 break;
 639         }
 640
 641         /*
 642          * We wish to note here that there are no more filemarks to be written.
 643          */
 644         softc->filemarks = 0;
 645         softc->flags &= ~SA_FLAG_TAPE_WRITTEN;
 646
 647         /*
 648          * And we are no longer open for business.
 649          */
 650         softc->flags &= ~closedbits;
 651
 652         /*
 653          * Inform users if tape state if frozen....
 654          */
 655         if (softc->flags & SA_FLAG_TAPE_FROZEN) {
 656                 xpt_print(periph->path, "tape is now frozen- use an OFFLINE, "
 657                     "REWIND or MTEOM command to clear this state.\n");
 658         }
 659
 660         /* release the device if it is no longer mounted */
 661         if ((softc->flags & SA_FLAG_TAPE_MOUNTED) == 0)
 662                 sareservereleaseunit(periph, FALSE);
 663
 664         cam_periph_unhold(periph);
 665         cam_periph_unlock(periph);
 666         cam_periph_release(periph);
 667
 668         return (error);
 669 }
 670
 671 /*
 672  * Actually translate the requested transfer into one the physical driver
 673  * can understand.  The transfer is described by a buf and will include
 674  * only one physical transfer.
 675  */
 676 static void
 677 sastrategy(struct bio *bp)
 678 {
 679         struct cam_periph *periph;
 680         struct sa_softc *softc;
 681
 682         bp->bio_resid = bp->bio_bcount;
 683         if (SA_IS_CTRL(bp->bio_dev)) {
 684                 biofinish(bp, NULL, EINVAL);
 685                 return;
 686         }
 687         periph = (struct cam_periph *)bp->bio_dev->si_drv1;
 688         if (periph == NULL) {
 689                 biofinish(bp, NULL, ENXIO);
 690                 return;
 691         }
 692         cam_periph_lock(periph);
 693
 694         softc = (struct sa_softc *)periph->softc;
 695
 696         if (softc->flags & SA_FLAG_INVALID) {
 697                 cam_periph_unlock(periph);
 698                 biofinish(bp, NULL, ENXIO);
 699                 return;
 700         }
 701
 702         if (softc->flags & SA_FLAG_TAPE_FROZEN) {
 703                 cam_periph_unlock(periph);
 704                 biofinish(bp, NULL, EPERM);
 705                 return;
 706         }
 707
 708         /*
 709          * This should actually never occur as the write(2)
 710          * system call traps attempts to write to a read-only
 711          * file descriptor.
 712          */
 713         if (bp->bio_cmd == BIO_WRITE && softc->open_rdonly) {
 714                 cam_periph_unlock(periph);
 715                 biofinish(bp, NULL, EBADF);
 716                 return;
 717         }
 718
 719         if (softc->open_pending_mount) {
 720                 int error = samount(periph, 0, bp->bio_dev);
 721                 if (error) {
 722                         cam_periph_unlock(periph);
 723                         biofinish(bp, NULL, ENXIO);
 724                         return;
 725                 }
 726                 saprevent(periph, PR_PREVENT);
 727                 softc->open_pending_mount = 0;
 728         }
 729
 730
 731         /*
 732          * If it's a null transfer, return immediately
 733          */
 734         if (bp->bio_bcount == 0) {
 735                 cam_periph_unlock(periph);
 736                 biodone(bp);
 737                 return;
 738         }
 739
 740         /* valid request?  */
 741         if (softc->flags & SA_FLAG_FIXED) {
 742                 /*
 743                  * Fixed block device.  The byte count must
 744                  * be a multiple of our block size.
 745                  */
 746                 if (((softc->blk_mask != ~0) &&
 747                     ((bp->bio_bcount & softc->blk_mask) != 0)) ||
 748                     ((softc->blk_mask == ~0) &&
 749                     ((bp->bio_bcount % softc->min_blk) != 0))) {
 750                         xpt_print(periph->path, "Invalid request.  Fixed block "
 751                             "device requests must be a multiple of %d bytes\n",
 752                             softc->min_blk);
 753                         cam_periph_unlock(periph);
 754                         biofinish(bp, NULL, EINVAL);
 755                         return;
 756                 }
 757         } else if ((bp->bio_bcount > softc->max_blk) ||
 758                    (bp->bio_bcount < softc->min_blk) ||
 759                    (bp->bio_bcount & softc->blk_mask) != 0) {
 760
 761                 xpt_print_path(periph->path);
 762                 printf("Invalid request.  Variable block "
 763                     "device requests must be ");
 764                 if (softc->blk_mask != 0) {
 765                         printf("a multiple of %d ", (0x1 << softc->blk_gran));
 766                 }
 767                 printf("between %d and %d bytes\n", softc->min_blk,
 768                     softc->max_blk);
 769                 cam_periph_unlock(periph);
 770                 biofinish(bp, NULL, EINVAL);
 771                 return;
 772         }
 773
 774         /*
 775          * Place it at the end of the queue.
 776          */
 777         bioq_insert_tail(&softc->bio_queue, bp);
 778         softc->queue_count++;
 779 #if     0
 780         CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
 781             ("sastrategy: queuing a %ld %s byte %s\n", bp->bio_bcount,
 782             (softc->flags & SA_FLAG_FIXED)?  "fixed" : "variable",
 783             (bp->bio_cmd == BIO_READ)? "read" : "write"));
 784 #endif
 785         if (softc->queue_count > 1) {
 786                 CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
 787                     ("sastrategy: queue count now %d\n", softc->queue_count));
 788         }
 789
 790         /*
 791          * Schedule ourselves for performing the work.
 792          */
 793         xpt_schedule(periph, CAM_PRIORITY_NORMAL);
 794         cam_periph_unlock(periph);
 795
 796         return;
 797 }
 798
 799
 800 #define PENDING_MOUNT_CHECK(softc, periph, dev)         \
 801         if (softc->open_pending_mount) {                \
 802                 error = samount(periph, 0, dev);        \
 803                 if (error) {                            \
 804                         break;                          \
 805                 }                                       \
 806                 saprevent(periph, PR_PREVENT);          \
 807                 softc->open_pending_mount = 0;          \
 808         }
 809
 810 static int
 811 saioctl(struct cdev *dev, u_long cmd, caddr_t arg, int flag, struct thread *td)
 812 {
 813         struct cam_periph *periph;
 814         struct sa_softc *softc;
 815         scsi_space_code spaceop;
 816         int didlockperiph = 0;
 817         int mode;
 818         int error = 0;
 819
 820         mode = SAMODE(dev);
 821         error = 0;              /* shut up gcc */
 822         spaceop = 0;            /* shut up gcc */
 823
 824         periph = (struct cam_periph *)dev->si_drv1;
 825         if (periph == NULL)
 826                 return (ENXIO);
 827
 828         cam_periph_lock(periph);
 829         softc = (struct sa_softc *)periph->softc;
 830
 831         /*
 832          * Check for control mode accesses. We allow MTIOCGET and
 833          * MTIOCERRSTAT (but need to be the only one open in order
 834          * to clear latched status), and MTSETBSIZE, MTSETDNSTY
 835          * and MTCOMP (but need to be the only one accessing this
 836          * device to run those).
 837          */
 838
 839         if (SA_IS_CTRL(dev)) {
 840                 switch (cmd) {
 841                 case MTIOCGETEOTMODEL:
 842                 case MTIOCGET:
 843                         break;
 844                 case MTIOCERRSTAT:
 845                         /*
 846                          * If the periph isn't already locked, lock it
 847                          * so our MTIOCERRSTAT can reset latched error stats.
 848                          *
 849                          * If the periph is already locked, skip it because
 850                          * we're just getting status and it'll be up to the
 851                          * other thread that has this device open to do
 852                          * an MTIOCERRSTAT that would clear latched status.
 853                          */
 854                         if ((periph->flags & CAM_PERIPH_LOCKED) == 0) {
 855                                 error = cam_periph_hold(periph, PRIBIO|PCATCH);
 856                                 if (error != 0) {
 857                                         cam_periph_unlock(periph);
 858                                         return (error);
 859                                 }
 860                                 didlockperiph = 1;
 861                         }
 862                         break;
 863
 864                 case MTIOCTOP:
 865                 {
 866                         struct mtop *mt = (struct mtop *) arg;
 867
 868                         /*
 869                          * Check to make sure it's an OP we can perform
 870                          * with no media inserted.
 871                          */
 872                         switch (mt->mt_op) {
 873                         case MTSETBSIZ:
 874                         case MTSETDNSTY:
 875                         case MTCOMP:
 876                                 mt = NULL;
 877                                 /* FALLTHROUGH */
 878                         default:
 879                                 break;
 880                         }
 881                         if (mt != NULL) {
 882                                 break;
 883                         }
 884                         /* FALLTHROUGH */
 885                 }
 886                 case MTIOCSETEOTMODEL:
 887                         /*
 888                          * We need to acquire the peripheral here rather
 889                          * than at open time because we are sharing writable
 890                          * access to data structures.
 891                          */
 892                         error = cam_periph_hold(periph, PRIBIO|PCATCH);
 893                         if (error != 0) {
 894                                 cam_periph_unlock(periph);
 895                                 return (error);
 896                         }
 897                         didlockperiph = 1;
 898                         break;
 899
 900                 default:
 901                         cam_periph_unlock(periph);
 902                         return (EINVAL);
 903                 }
 904         }
 905
 906         /*
 907          * Find the device that the user is talking about
 908          */
 909         switch (cmd) {
 910         case MTIOCGET:
 911         {
 912                 struct mtget *g = (struct mtget *)arg;
 913
 914                 /*
 915                  * If this isn't the control mode device, actually go out
 916                  * and ask the drive again what it's set to.
 917                  */
 918                 if (!SA_IS_CTRL(dev) && !softc->open_pending_mount) {
 919                         u_int8_t write_protect;
 920                         int comp_enabled, comp_supported;
 921                         error = sagetparams(periph, SA_PARAM_ALL,
 922                             &softc->media_blksize, &softc->media_density,
 923                             &softc->media_numblks, &softc->buffer_mode,
 924                             &write_protect, &softc->speed, &comp_supported,
 925                             &comp_enabled, &softc->comp_algorithm, NULL);
 926                         if (error)
 927                                 break;
 928                         if (write_protect)
 929                                 softc->flags |= SA_FLAG_TAPE_WP;
 930                         else
 931                                 softc->flags &= ~SA_FLAG_TAPE_WP;
 932                         softc->flags &= ~(SA_FLAG_COMP_SUPP|
 933                             SA_FLAG_COMP_ENABLED|SA_FLAG_COMP_UNSUPP);
 934                         if (comp_supported) {
 935                                 if (softc->saved_comp_algorithm == 0)
 936                                         softc->saved_comp_algorithm =
 937                                             softc->comp_algorithm;
 938                                 softc->flags |= SA_FLAG_COMP_SUPP;
 939                                 if (comp_enabled)
 940                                         softc->flags |= SA_FLAG_COMP_ENABLED;
 941                         } else
 942                                 softc->flags |= SA_FLAG_COMP_UNSUPP;
 943                 }
 944                 bzero(g, sizeof(struct mtget));
 945                 g->mt_type = MT_ISAR;
 946                 if (softc->flags & SA_FLAG_COMP_UNSUPP) {
 947                         g->mt_comp = MT_COMP_UNSUPP;
 948                         g->mt_comp0 = MT_COMP_UNSUPP;
 949                         g->mt_comp1 = MT_COMP_UNSUPP;
 950                         g->mt_comp2 = MT_COMP_UNSUPP;
 951                         g->mt_comp3 = MT_COMP_UNSUPP;
 952                 } else {
 953                         if ((softc->flags & SA_FLAG_COMP_ENABLED) == 0) {
 954                                 g->mt_comp = MT_COMP_DISABLED;
 955                         } else {
 956                                 g->mt_comp = softc->comp_algorithm;
 957                         }
 958                         g->mt_comp0 = softc->comp_algorithm;
 959                         g->mt_comp1 = softc->comp_algorithm;
 960                         g->mt_comp2 = softc->comp_algorithm;
 961                         g->mt_comp3 = softc->comp_algorithm;
 962                 }
 963                 g->mt_density = softc->media_density;
 964                 g->mt_density0 = softc->media_density;
 965                 g->mt_density1 = softc->media_density;
 966                 g->mt_density2 = softc->media_density;
 967                 g->mt_density3 = softc->media_density;
 968                 g->mt_blksiz = softc->media_blksize;
 969                 g->mt_blksiz0 = softc->media_blksize;
 970                 g->mt_blksiz1 = softc->media_blksize;
 971                 g->mt_blksiz2 = softc->media_blksize;
 972                 g->mt_blksiz3 = softc->media_blksize;
 973                 g->mt_fileno = softc->fileno;
 974                 g->mt_blkno = softc->blkno;
 975                 g->mt_dsreg = (short) softc->dsreg;
 976                 /*
 977                  * Yes, we know that this is likely to overflow
 978                  */
 979                 if (softc->last_resid_was_io) {
 980                         if ((g->mt_resid = (short) softc->last_io_resid) != 0) {
 981                                 if (SA_IS_CTRL(dev) == 0 || didlockperiph) {
 982                                         softc->last_io_resid = 0;
 983                                 }
 984                         }
 985                 } else {
 986                         if ((g->mt_resid = (short)softc->last_ctl_resid) != 0) {
 987                                 if (SA_IS_CTRL(dev) == 0 || didlockperiph) {
 988                                         softc->last_ctl_resid = 0;
 989                                 }
 990                         }
 991                 }
 992                 error = 0;
 993                 break;
 994         }
 995         case MTIOCERRSTAT:
 996         {
 997                 struct scsi_tape_errors *sep =
 998                     &((union mterrstat *)arg)->scsi_errstat;
 999
1000                 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
1001                     ("saioctl: MTIOCERRSTAT\n"));
1002
1003                 bzero(sep, sizeof(*sep));
1004                 sep->io_resid = softc->last_io_resid;
1005                 bcopy((caddr_t) &softc->last_io_sense, sep->io_sense,
1006                     sizeof (sep->io_sense));
1007                 bcopy((caddr_t) &softc->last_io_cdb, sep->io_cdb,
1008                     sizeof (sep->io_cdb));
1009                 sep->ctl_resid = softc->last_ctl_resid;
1010                 bcopy((caddr_t) &softc->last_ctl_sense, sep->ctl_sense,
1011                     sizeof (sep->ctl_sense));
1012                 bcopy((caddr_t) &softc->last_ctl_cdb, sep->ctl_cdb,
1013                     sizeof (sep->ctl_cdb));
1014
1015                 if ((SA_IS_CTRL(dev) == 0 && softc->open_pending_mount) ||
1016                     didlockperiph)
1017                         bzero((caddr_t) &softc->errinfo,
1018                             sizeof (softc->errinfo));
1019                 error = 0;
1020                 break;
1021         }
1022         case MTIOCTOP:
1023         {
1024                 struct mtop *mt;
1025                 int    count;
1026
1027                 PENDING_MOUNT_CHECK(softc, periph, dev);
1028
1029                 mt = (struct mtop *)arg;
1030
1031
1032                 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
1033                          ("saioctl: op=0x%x count=0x%x\n",
1034                           mt->mt_op, mt->mt_count));
1035
1036                 count = mt->mt_count;
1037                 switch (mt->mt_op) {
1038                 case MTWEOF:    /* write an end-of-file marker */
1039                         /*
1040                          * We don't need to clear the SA_FLAG_TAPE_WRITTEN
1041                          * flag because by keeping track of filemarks
1042                          * we have last written we know ehether or not
1043                          * we need to write more when we close the device.
1044                          */
1045                         error = sawritefilemarks(periph, count, FALSE);
1046                         break;
1047                 case MTWSS:     /* write a setmark */
1048                         error = sawritefilemarks(periph, count, TRUE);
1049                         break;
1050                 case MTBSR:     /* backward space record */
1051                 case MTFSR:     /* forward space record */
1052                 case MTBSF:     /* backward space file */
1053                 case MTFSF:     /* forward space file */
1054                 case MTBSS:     /* backward space setmark */
1055                 case MTFSS:     /* forward space setmark */
1056                 case MTEOD:     /* space to end of recorded medium */
1057                 {
1058                         int nmarks;
1059
1060                         spaceop = SS_FILEMARKS;
1061                         nmarks = softc->filemarks;
1062                         error = sacheckeod(periph);
1063                         if (error) {
1064                                 xpt_print(periph->path,
1065                                     "EOD check prior to spacing failed\n");
1066                                 softc->flags |= SA_FLAG_EIO_PENDING;
1067                                 break;
1068                         }
1069                         nmarks -= softc->filemarks;
1070                         switch(mt->mt_op) {
1071                         case MTBSR:
1072                                 count = -count;
1073                                 /* FALLTHROUGH */
1074                         case MTFSR:
1075                                 spaceop = SS_BLOCKS;
1076                                 break;
1077                         case MTBSF:
1078                                 count = -count;
1079                                 /* FALLTHROUGH */
1080                         case MTFSF:
1081                                 break;
1082                         case MTBSS:
1083                                 count = -count;
1084                                 /* FALLTHROUGH */
1085                         case MTFSS:
1086                                 spaceop = SS_SETMARKS;
1087                                 break;
1088                         case MTEOD:
1089                                 spaceop = SS_EOD;
1090                                 count = 0;
1091                                 nmarks = 0;
1092                                 break;
1093                         default:
1094                                 error = EINVAL;
1095                                 break;
1096                         }
1097                         if (error)
1098                                 break;
1099
1100                         nmarks = softc->filemarks;
1101                         /*
1102                          * XXX: Why are we checking again?
1103                          */
1104                         error = sacheckeod(periph);
1105                         if (error)
1106                                 break;
1107                         nmarks -= softc->filemarks;
1108                         error = saspace(periph, count - nmarks, spaceop);
1109                         /*
1110                          * At this point, clear that we've written the tape
1111                          * and that we've written any filemarks. We really
1112                          * don't know what the applications wishes to do next-
1113                          * the sacheckeod's will make sure we terminated the
1114                          * tape correctly if we'd been writing, but the next
1115                          * action the user application takes will set again
1116                          * whether we need to write filemarks.
1117                          */
1118                         softc->flags &=
1119                             ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
1120                         softc->filemarks = 0;
1121                         break;
1122                 }
1123                 case MTREW:     /* rewind */
1124                         PENDING_MOUNT_CHECK(softc, periph, dev);
1125                         (void) sacheckeod(periph);
1126                         error = sarewind(periph);
1127                         /* see above */
1128                         softc->flags &=
1129                             ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
1130                         softc->flags &= ~SA_FLAG_ERR_PENDING;
1131                         softc->filemarks = 0;
1132                         break;
1133                 case MTERASE:   /* erase */
1134                         PENDING_MOUNT_CHECK(softc, periph, dev);
1135                         error = saerase(periph, count);
1136                         softc->flags &=
1137                             ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
1138                         softc->flags &= ~SA_FLAG_ERR_PENDING;
1139                         break;
1140                 case MTRETENS:  /* re-tension tape */
1141                         PENDING_MOUNT_CHECK(softc, periph, dev);
1142                         error = saretension(periph);
1143                         softc->flags &=
1144                             ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
1145                         softc->flags &= ~SA_FLAG_ERR_PENDING;
1146                         break;
1147                 case MTOFFL:    /* rewind and put the drive offline */
1148
1149                         PENDING_MOUNT_CHECK(softc, periph, dev);
1150
1151                         (void) sacheckeod(periph);
1152                         /* see above */
1153                         softc->flags &= ~SA_FLAG_TAPE_WRITTEN;
1154                         softc->filemarks = 0;
1155
1156                         error = sarewind(periph);
1157                         /* clear the frozen flag anyway */
1158                         softc->flags &= ~SA_FLAG_TAPE_FROZEN;
1159
1160                         /*
1161                          * Be sure to allow media removal before ejecting.
1162                          */
1163
1164                         saprevent(periph, PR_ALLOW);
1165                         if (error == 0) {
1166                                 error = saloadunload(periph, FALSE);
1167                                 if (error == 0) {
1168                                         softc->flags &= ~SA_FLAG_TAPE_MOUNTED;
1169                                 }
1170                         }
1171                         break;
1172
1173                 case MTNOP:     /* no operation, sets status only */
1174                 case MTCACHE:   /* enable controller cache */
1175                 case MTNOCACHE: /* disable controller cache */
1176                         error = 0;
1177                         break;
1178
1179                 case MTSETBSIZ: /* Set block size for device */
1180
1181                         PENDING_MOUNT_CHECK(softc, periph, dev);
1182
1183                         error = sasetparams(periph, SA_PARAM_BLOCKSIZE, count,
1184                                             0, 0, 0);
1185                         if (error == 0) {
1186                                 softc->last_media_blksize =
1187                                     softc->media_blksize;
1188                                 softc->media_blksize = count;
1189                                 if (count) {
1190                                         softc->flags |= SA_FLAG_FIXED;
1191                                         if (powerof2(count)) {
1192                                                 softc->blk_shift =
1193                                                     ffs(count) - 1;
1194                                                 softc->blk_mask = count - 1;
1195                                         } else {
1196                                                 softc->blk_mask = ~0;
1197                                                 softc->blk_shift = 0;
1198                                         }
1199                                         /*
1200                                          * Make the user's desire 'persistent'.
1201                                          */
1202                                         softc->quirks &= ~SA_QUIRK_VARIABLE;
1203                                         softc->quirks |= SA_QUIRK_FIXED;
1204                                 } else {
1205                                         softc->flags &= ~SA_FLAG_FIXED;
1206                                         if (softc->max_blk == 0) {
1207                                                 softc->max_blk = ~0;
1208                                         }
1209                                         softc->blk_shift = 0;
1210                                         if (softc->blk_gran != 0) {
1211                                                 softc->blk_mask =
1212                                                     softc->blk_gran - 1;
1213                                         } else {
1214                                                 softc->blk_mask = 0;
1215                                         }
1216                                         /*
1217                                          * Make the user's desire 'persistent'.
1218                                          */
1219                                         softc->quirks |= SA_QUIRK_VARIABLE;
1220                                         softc->quirks &= ~SA_QUIRK_FIXED;
1221                                 }
1222                         }
1223                         break;
1224                 case MTSETDNSTY:        /* Set density for device and mode */
1225                         PENDING_MOUNT_CHECK(softc, periph, dev);
1226
1227                         if (count > UCHAR_MAX) {
1228                                 error = EINVAL;
1229                                 break;
1230                         } else {
1231                                 error = sasetparams(periph, SA_PARAM_DENSITY,
1232                                                     0, count, 0, 0);
1233                         }
1234                         break;
1235                 case MTCOMP:    /* enable compression */
1236                         PENDING_MOUNT_CHECK(softc, periph, dev);
1237                         /*
1238                          * Some devices don't support compression, and
1239                          * don't like it if you ask them for the
1240                          * compression page.
1241                          */
1242                         if ((softc->quirks & SA_QUIRK_NOCOMP) ||
1243                             (softc->flags & SA_FLAG_COMP_UNSUPP)) {
1244                                 error = ENODEV;
1245                                 break;
1246                         }
1247                         error = sasetparams(periph, SA_PARAM_COMPRESSION,
1248                             0, 0, count, SF_NO_PRINT);
1249                         break;
1250                 default:
1251                         error = EINVAL;
1252                 }
1253                 break;
1254         }
1255         case MTIOCIEOT:
1256         case MTIOCEEOT:
1257                 error = 0;
1258                 break;
1259         case MTIOCRDSPOS:
1260                 PENDING_MOUNT_CHECK(softc, periph, dev);
1261                 error = sardpos(periph, 0, (u_int32_t *) arg);
1262                 break;
1263         case MTIOCRDHPOS:
1264                 PENDING_MOUNT_CHECK(softc, periph, dev);
1265                 error = sardpos(periph, 1, (u_int32_t *) arg);
1266                 break;
1267         case MTIOCSLOCATE:
1268                 PENDING_MOUNT_CHECK(softc, periph, dev);
1269                 error = sasetpos(periph, 0, (u_int32_t *) arg);
1270                 break;
1271         case MTIOCHLOCATE:
1272                 PENDING_MOUNT_CHECK(softc, periph, dev);
1273                 error = sasetpos(periph, 1, (u_int32_t *) arg);
1274                 break;
1275         case MTIOCGETEOTMODEL:
1276                 error = 0;
1277                 if (softc->quirks & SA_QUIRK_1FM)
1278                         mode = 1;
1279                 else
1280                         mode = 2;
1281                 *((u_int32_t *) arg) = mode;
1282                 break;
1283         case MTIOCSETEOTMODEL:
1284                 error = 0;
1285                 switch (*((u_int32_t *) arg)) {
1286                 case 1:
1287                         softc->quirks &= ~SA_QUIRK_2FM;
1288                         softc->quirks |= SA_QUIRK_1FM;
1289                         break;
1290                 case 2:
1291                         softc->quirks &= ~SA_QUIRK_1FM;
1292                         softc->quirks |= SA_QUIRK_2FM;
1293                         break;
1294                 default:
1295                         error = EINVAL;
1296                         break;
1297                 }
1298                 break;
1299         default:
1300                 error = cam_periph_ioctl(periph, cmd, arg, saerror);
1301                 break;
1302         }
1303
1304         /*
1305          * Check to see if we cleared a frozen state
1306          */
1307         if (error == 0 && (softc->flags & SA_FLAG_TAPE_FROZEN)) {
1308                 switch(cmd) {
1309                 case MTIOCRDSPOS:
1310                 case MTIOCRDHPOS:
1311                 case MTIOCSLOCATE:
1312                 case MTIOCHLOCATE:
1313                         softc->fileno = (daddr_t) -1;
1314                         softc->blkno = (daddr_t) -1;
1315                         softc->flags &= ~SA_FLAG_TAPE_FROZEN;
1316                         xpt_print(periph->path,
1317                             "tape state now unfrozen.\n");
1318                         break;
1319                 default:
1320                         break;
1321                 }
1322         }
1323         if (didlockperiph) {
1324                 cam_periph_unhold(periph);
1325         }
1326         cam_periph_unlock(periph);
1327         return (error);
1328 }
1329
1330 static void
1331 sainit(void)
1332 {
1333         cam_status status;
1334
1335         /*
1336          * Install a global async callback.
1337          */
1338         status = xpt_register_async(AC_FOUND_DEVICE, saasync, NULL, NULL);
1339
1340         if (status != CAM_REQ_CMP) {
1341                 printf("sa: Failed to attach master async callback "
1342                        "due to status 0x%x!\n", status);
1343         }
1344 }
1345
1346 static void
1347 saoninvalidate(struct cam_periph *periph)
1348 {
1349         struct sa_softc *softc;
1350
1351         softc = (struct sa_softc *)periph->softc;
1352
1353         /*
1354          * De-register any async callbacks.
1355          */
1356         xpt_register_async(0, saasync, periph, periph->path);
1357
1358         softc->flags |= SA_FLAG_INVALID;
1359
1360         /*
1361          * Return all queued I/O with ENXIO.
1362          * XXX Handle any transactions queued to the card
1363          *     with XPT_ABORT_CCB.
1364          */
1365         bioq_flush(&softc->bio_queue, NULL, ENXIO);
1366         softc->queue_count = 0;
1367
1368         xpt_print(periph->path, "lost device\n");
1369
1370 }
1371
1372 static void
1373 sacleanup(struct cam_periph *periph)
1374 {
1375         struct sa_softc *softc;
1376         int i;
1377
1378         softc = (struct sa_softc *)periph->softc;
1379
1380         xpt_print(periph->path, "removing device entry\n");
1381         devstat_remove_entry(softc->device_stats);
1382         cam_periph_unlock(periph);
1383         destroy_dev(softc->devs.ctl_dev);
1384         for (i = 0; i < SA_NUM_MODES; i++) {
1385                 destroy_dev(softc->devs.mode_devs[i].r_dev);
1386                 destroy_dev(softc->devs.mode_devs[i].nr_dev);
1387                 destroy_dev(softc->devs.mode_devs[i].er_dev);
1388         }
1389         cam_periph_lock(periph);
1390         free(softc, M_SCSISA);
1391 }
1392
1393 static void
1394 saasync(void *callback_arg, u_int32_t code,
1395         struct cam_path *path, void *arg)
1396 {
1397         struct cam_periph *periph;
1398
1399         periph = (struct cam_periph *)callback_arg;
1400         switch (code) {
1401         case AC_FOUND_DEVICE:
1402         {
1403                 struct ccb_getdev *cgd;
1404                 cam_status status;
1405
1406                 cgd = (struct ccb_getdev *)arg;
1407                 if (cgd == NULL)
1408                         break;
1409
1410                 if (cgd->protocol != PROTO_SCSI)
1411                         break;
1412
1413                 if (SID_TYPE(&cgd->inq_data) != T_SEQUENTIAL)
1414                         break;
1415
1416                 /*
1417                  * Allocate a peripheral instance for
1418                  * this device and start the probe
1419                  * process.
1420                  */
1421                 status = cam_periph_alloc(saregister, saoninvalidate,
1422                                           sacleanup, sastart,
1423                                           "sa", CAM_PERIPH_BIO, cgd->ccb_h.path,
1424                                           saasync, AC_FOUND_DEVICE, cgd);
1425
1426                 if (status != CAM_REQ_CMP
1427                  && status != CAM_REQ_INPROG)
1428                         printf("saasync: Unable to probe new device "
1429                                 "due to status 0x%x\n", status);
1430                 break;
1431         }
1432         default:
1433                 cam_periph_async(periph, code, path, arg);
1434                 break;
1435         }
1436 }
1437
1438 static cam_status
1439 saregister(struct cam_periph *periph, void *arg)
1440 {
1441         struct sa_softc *softc;
1442         struct ccb_getdev *cgd;
1443         struct ccb_pathinq cpi;
1444         caddr_t match;
1445         int i;
1446
1447         cgd = (struct ccb_getdev *)arg;
1448         if (cgd == NULL) {
1449                 printf("saregister: no getdev CCB, can't register device\n");
1450                 return (CAM_REQ_CMP_ERR);
1451         }
1452
1453         softc = (struct sa_softc *)
1454             malloc(sizeof (*softc), M_SCSISA, M_NOWAIT | M_ZERO);
1455         if (softc == NULL) {
1456                 printf("saregister: Unable to probe new device. "
1457                        "Unable to allocate softc\n");
1458                 return (CAM_REQ_CMP_ERR);
1459         }
1460         softc->scsi_rev = SID_ANSI_REV(&cgd->inq_data);
1461         softc->state = SA_STATE_NORMAL;
1462         softc->fileno = (daddr_t) -1;
1463         softc->blkno = (daddr_t) -1;
1464
1465         bioq_init(&softc->bio_queue);
1466         periph->softc = softc;
1467
1468         /*
1469          * See if this device has any quirks.
1470          */
1471         match = cam_quirkmatch((caddr_t)&cgd->inq_data,
1472                                (caddr_t)sa_quirk_table,
1473                                sizeof(sa_quirk_table)/sizeof(*sa_quirk_table),
1474                                sizeof(*sa_quirk_table), scsi_inquiry_match);
1475
1476         if (match != NULL) {
1477                 softc->quirks = ((struct sa_quirk_entry *)match)->quirks;
1478                 softc->last_media_blksize =
1479                     ((struct sa_quirk_entry *)match)->prefblk;
1480         } else
1481                 softc->quirks = SA_QUIRK_NONE;
1482
1483         bzero(&cpi, sizeof(cpi));
1484         xpt_setup_ccb(&cpi.ccb_h, periph->path, CAM_PRIORITY_NORMAL);
1485         cpi.ccb_h.func_code = XPT_PATH_INQ;
1486         xpt_action((union ccb *)&cpi);
1487
1488         /*
1489          * The SA driver supports a blocksize, but we don't know the
1490          * blocksize until we media is inserted.  So, set a flag to
1491          * indicate that the blocksize is unavailable right now.
1492          */
1493         cam_periph_unlock(periph);
1494         softc->device_stats = devstat_new_entry("sa", periph->unit_number, 0,
1495             DEVSTAT_BS_UNAVAILABLE, SID_TYPE(&cgd->inq_data) |
1496             XPORT_DEVSTAT_TYPE(cpi.transport), DEVSTAT_PRIORITY_TAPE);
1497
1498         softc->devs.ctl_dev = make_dev(&sa_cdevsw, SAMINOR(SA_CTLDEV,
1499             0, SA_ATYPE_R), UID_ROOT, GID_OPERATOR,
1500             0660, "%s%d.ctl", periph->periph_name, periph->unit_number);
1501         softc->devs.ctl_dev->si_drv1 = periph;
1502
1503         for (i = 0; i < SA_NUM_MODES; i++) {
1504
1505                 softc->devs.mode_devs[i].r_dev = make_dev(&sa_cdevsw,
1506                     SAMINOR(SA_NOT_CTLDEV, i, SA_ATYPE_R),
1507                     UID_ROOT, GID_OPERATOR, 0660, "%s%d.%d",
1508                     periph->periph_name, periph->unit_number, i);
1509                 softc->devs.mode_devs[i].r_dev->si_drv1 = periph;
1510
1511                 softc->devs.mode_devs[i].nr_dev = make_dev(&sa_cdevsw,
1512                     SAMINOR(SA_NOT_CTLDEV, i, SA_ATYPE_NR),
1513                     UID_ROOT, GID_OPERATOR, 0660, "n%s%d.%d",
1514                     periph->periph_name, periph->unit_number, i);
1515                 softc->devs.mode_devs[i].nr_dev->si_drv1 = periph;
1516
1517                 softc->devs.mode_devs[i].er_dev = make_dev(&sa_cdevsw,
1518                     SAMINOR(SA_NOT_CTLDEV, i, SA_ATYPE_ER),
1519                     UID_ROOT, GID_OPERATOR, 0660, "e%s%d.%d",
1520                     periph->periph_name, periph->unit_number, i);
1521                 softc->devs.mode_devs[i].er_dev->si_drv1 = periph;
1522
1523                 /*
1524                  * Make the (well known) aliases for the first mode.
1525                  */
1526                 if (i == 0) {
1527                         struct cdev *alias;
1528
1529                         alias = make_dev_alias(softc->devs.mode_devs[i].r_dev,
1530                            "%s%d", periph->periph_name, periph->unit_number);
1531                         alias->si_drv1 = periph;
1532                         alias = make_dev_alias(softc->devs.mode_devs[i].nr_dev,
1533                             "n%s%d", periph->periph_name, periph->unit_number);
1534                         alias->si_drv1 = periph;
1535                         alias = make_dev_alias(softc->devs.mode_devs[i].er_dev,
1536                             "e%s%d", periph->periph_name, periph->unit_number);
1537                         alias->si_drv1 = periph;
1538                 }
1539         }
1540         cam_periph_lock(periph);
1541
1542         /*
1543          * Add an async callback so that we get
1544          * notified if this device goes away.
1545          */
1546         xpt_register_async(AC_LOST_DEVICE, saasync, periph, periph->path);
1547
1548         xpt_announce_periph(periph, NULL);
1549
1550         return (CAM_REQ_CMP);
1551 }
1552
1553 static void
1554 sastart(struct cam_periph *periph, union ccb *start_ccb)
1555 {
1556         struct sa_softc *softc;
1557
1558         softc = (struct sa_softc *)periph->softc;
1559
1560         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("sastart\n"));
1561
1562
1563         switch (softc->state) {
1564         case SA_STATE_NORMAL:
1565         {
1566                 /* Pull a buffer from the queue and get going on it */
1567                 struct bio *bp;
1568
1569                 /*
1570                  * See if there is a buf with work for us to do..
1571                  */
1572                 bp = bioq_first(&softc->bio_queue);
1573                 if (periph->immediate_priority <= periph->pinfo.priority) {
1574                         CAM_DEBUG_PRINT(CAM_DEBUG_SUBTRACE,
1575                                         ("queuing for immediate ccb\n"));
1576                         Set_CCB_Type(start_ccb, SA_CCB_WAITING);
1577                         SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
1578                                           periph_links.sle);
1579                         periph->immediate_priority = CAM_PRIORITY_NONE;
1580                         wakeup(&periph->ccb_list);
1581                 } else if (bp == NULL) {
1582                         xpt_release_ccb(start_ccb);
1583                 } else if ((softc->flags & SA_FLAG_ERR_PENDING) != 0) {
1584                         struct bio *done_bp;
1585 again:
1586                         softc->queue_count--;
1587                         bioq_remove(&softc->bio_queue, bp);
1588                         bp->bio_resid = bp->bio_bcount;
1589                         done_bp = bp;
1590                         if ((softc->flags & SA_FLAG_EOM_PENDING) != 0) {
1591                                 /*
1592                                  * We now just clear errors in this case
1593                                  * and let the residual be the notifier.
1594                                  */
1595                                 bp->bio_error = 0;
1596                         } else if ((softc->flags & SA_FLAG_EOF_PENDING) != 0) {
1597                                 /*
1598                                  * This can only happen if we're reading
1599                                  * in fixed length mode. In this case,
1600                                  * we dump the rest of the list the
1601                                  * same way.
1602                                  */
1603                                 bp->bio_error = 0;
1604                                 if (bioq_first(&softc->bio_queue) != NULL) {
1605                                         biodone(done_bp);
1606                                         goto again;
1607                                 }
1608                         } else if ((softc->flags & SA_FLAG_EIO_PENDING) != 0) {
1609                                 bp->bio_error = EIO;
1610                                 bp->bio_flags |= BIO_ERROR;
1611                         }
1612                         bp = bioq_first(&softc->bio_queue);
1613                         /*
1614                          * Only if we have no other buffers queued up
1615                          * do we clear the pending error flag.
1616                          */
1617                         if (bp == NULL)
1618                                 softc->flags &= ~SA_FLAG_ERR_PENDING;
1619                         CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
1620                             ("sastart- ERR_PENDING now 0x%x, bp is %sNULL, "
1621                             "%d more buffers queued up\n",
1622                             (softc->flags & SA_FLAG_ERR_PENDING),
1623                             (bp != NULL)? "not " : " ", softc->queue_count));
1624                         xpt_release_ccb(start_ccb);
1625                         biodone(done_bp);
1626                 } else {
1627                         u_int32_t length;
1628
1629                         bioq_remove(&softc->bio_queue, bp);
1630                         softc->queue_count--;
1631
1632                         if ((softc->flags & SA_FLAG_FIXED) != 0) {
1633                                 if (softc->blk_shift != 0) {
1634                                         length =
1635                                             bp->bio_bcount >> softc->blk_shift;
1636                                 } else if (softc->media_blksize != 0) {
1637                                         length = bp->bio_bcount /
1638                                             softc->media_blksize;
1639                                 } else {
1640                                         bp->bio_error = EIO;
1641                                         xpt_print(periph->path, "zero blocksize"
1642                                             " for FIXED length writes?\n");
1643                                         biodone(bp);
1644                                         break;
1645                                 }
1646 #if     0
1647                                 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_INFO,
1648                                     ("issuing a %d fixed record %s\n",
1649                                     length,  (bp->bio_cmd == BIO_READ)? "read" :
1650                                     "write"));
1651 #endif
1652                         } else {
1653                                 length = bp->bio_bcount;
1654 #if     0
1655                                 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_INFO,
1656                                     ("issuing a %d variable byte %s\n",
1657                                     length,  (bp->bio_cmd == BIO_READ)? "read" :
1658                                     "write"));
1659 #endif
1660                         }
1661                         devstat_start_transaction_bio(softc->device_stats, bp);
1662                         /*
1663                          * Some people have theorized that we should
1664                          * suppress illegal length indication if we are
1665                          * running in variable block mode so that we don't
1666                          * have to request sense every time our requested
1667                          * block size is larger than the written block.
1668                          * The residual information from the ccb allows
1669                          * us to identify this situation anyway.  The only
1670                          * problem with this is that we will not get
1671                          * information about blocks that are larger than
1672                          * our read buffer unless we set the block size
1673                          * in the mode page to something other than 0.
1674                          *
1675                          * I believe that this is a non-issue. If user apps
1676                          * don't adjust their read size to match our record
1677                          * size, that's just life. Anyway, the typical usage
1678                          * would be to issue, e.g., 64KB reads and occasionally
1679                          * have to do deal with 512 byte or 1KB intermediate
1680                          * records.
1681                          */
1682                         softc->dsreg = (bp->bio_cmd == BIO_READ)?
1683                             MTIO_DSREG_RD : MTIO_DSREG_WR;
1684                         scsi_sa_read_write(&start_ccb->csio, 0, sadone,
1685                             MSG_SIMPLE_Q_TAG, (bp->bio_cmd == BIO_READ),
1686                             FALSE, (softc->flags & SA_FLAG_FIXED) != 0,
1687                             length, bp->bio_data, bp->bio_bcount, SSD_FULL_SIZE,
1688                             IO_TIMEOUT);
1689                         start_ccb->ccb_h.ccb_pflags &= ~SA_POSITION_UPDATED;
1690                         Set_CCB_Type(start_ccb, SA_CCB_BUFFER_IO);
1691                         start_ccb->ccb_h.ccb_bp = bp;
1692                         bp = bioq_first(&softc->bio_queue);
1693                         xpt_action(start_ccb);
1694                 }
1695
1696                 if (bp != NULL) {
1697                         /* Have more work to do, so ensure we stay scheduled */
1698                         xpt_schedule(periph, CAM_PRIORITY_NORMAL);
1699                 }
1700                 break;
1701         }
1702         case SA_STATE_ABNORMAL:
1703         default:
1704                 panic("state 0x%x in sastart", softc->state);
1705                 break;
1706         }
1707 }
1708
1709
1710 static void
1711 sadone(struct cam_periph *periph, union ccb *done_ccb)
1712 {
1713         struct sa_softc *softc;
1714         struct ccb_scsiio *csio;
1715
1716         softc = (struct sa_softc *)periph->softc;
1717         csio = &done_ccb->csio;
1718         switch (CCB_Type(csio)) {
1719         case SA_CCB_BUFFER_IO:
1720         {
1721                 struct bio *bp;
1722                 int error;
1723
1724                 softc->dsreg = MTIO_DSREG_REST;
1725                 bp = (struct bio *)done_ccb->ccb_h.ccb_bp;
1726                 error = 0;
1727                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
1728                         if ((error = saerror(done_ccb, 0, 0)) == ERESTART) {
1729                                 /*
1730                                  * A retry was scheduled, so just return.
1731                                  */
1732                                 return;
1733                         }
1734                 }
1735
1736                 if (error == EIO) {
1737
1738                         /*
1739                          * Catastrophic error. Mark the tape as frozen
1740                          * (we no longer know tape position).
1741                          *
1742                          * Return all queued I/O with EIO, and unfreeze
1743                          * our queue so that future transactions that
1744                          * attempt to fix this problem can get to the
1745                          * device.
1746                          *
1747                          */
1748
1749                         softc->flags |= SA_FLAG_TAPE_FROZEN;
1750                         bioq_flush(&softc->bio_queue, NULL, EIO);
1751                 }
1752                 if (error != 0) {
1753                         bp->bio_resid = bp->bio_bcount;
1754                         bp->bio_error = error;
1755                         bp->bio_flags |= BIO_ERROR;
1756                         /*
1757                          * In the error case, position is updated in saerror.
1758                          */
1759                 } else {
1760                         bp->bio_resid = csio->resid;
1761                         bp->bio_error = 0;
1762                         if (csio->resid != 0) {
1763                                 bp->bio_flags |= BIO_ERROR;
1764                         }
1765                         if (bp->bio_cmd == BIO_WRITE) {
1766                                 softc->flags |= SA_FLAG_TAPE_WRITTEN;
1767                                 softc->filemarks = 0;
1768                         }
1769                         if (!(csio->ccb_h.ccb_pflags & SA_POSITION_UPDATED) &&
1770                             (softc->blkno != (daddr_t) -1)) {
1771                                 if ((softc->flags & SA_FLAG_FIXED) != 0) {
1772                                         u_int32_t l;
1773                                         if (softc->blk_shift != 0) {
1774                                                 l = bp->bio_bcount >>
1775                                                         softc->blk_shift;
1776                                         } else {
1777                                                 l = bp->bio_bcount /
1778                                                         softc->media_blksize;
1779                                         }
1780                                         softc->blkno += (daddr_t) l;
1781                                 } else {
1782                                         softc->blkno++;
1783                                 }
1784                         }
1785                 }
1786                 /*
1787                  * If we had an error (immediate or pending),
1788                  * release the device queue now.
1789                  */
1790                 if (error || (softc->flags & SA_FLAG_ERR_PENDING))
1791                         cam_release_devq(done_ccb->ccb_h.path, 0, 0, 0, 0);
1792                 if (error || bp->bio_resid) {
1793                         CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
1794                                   ("error %d resid %ld count %ld\n", error,
1795                                   bp->bio_resid, bp->bio_bcount));
1796                 }
1797                 biofinish(bp, softc->device_stats, 0);
1798                 break;
1799         }
1800         case SA_CCB_WAITING:
1801         {
1802                 /* Caller will release the CCB */
1803                 wakeup(&done_ccb->ccb_h.cbfcnp);
1804                 return;
1805         }
1806         }
1807         xpt_release_ccb(done_ccb);
1808 }
1809
1810 /*
1811  * Mount the tape (make sure it's ready for I/O).
1812  */
1813 static int
1814 samount(struct cam_periph *periph, int oflags, struct cdev *dev)
1815 {
1816         struct  sa_softc *softc;
1817         union   ccb *ccb;
1818         int     error;
1819
1820         /*
1821          * oflags can be checked for 'kind' of open (read-only check) - later
1822          * dev can be checked for a control-mode or compression open - later
1823          */
1824         UNUSED_PARAMETER(oflags);
1825         UNUSED_PARAMETER(dev);
1826
1827
1828         softc = (struct sa_softc *)periph->softc;
1829
1830         /*
1831          * This should determine if something has happend since the last
1832          * open/mount that would invalidate the mount. We do *not* want
1833          * to retry this command- we just want the status. But we only
1834          * do this if we're mounted already- if we're not mounted,
1835          * we don't care about the unit read state and can instead use
1836          * this opportunity to attempt to reserve the tape unit.
1837          */
1838
1839         if (softc->flags & SA_FLAG_TAPE_MOUNTED) {
1840                 ccb = cam_periph_getccb(periph, 1);
1841                 scsi_test_unit_ready(&ccb->csio, 0, sadone,
1842                     MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT);
1843                 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1844                     softc->device_stats);
1845                 if (error == ENXIO) {
1846                         softc->flags &= ~SA_FLAG_TAPE_MOUNTED;
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                 } else if (error) {
1852                         /*
1853                          * We don't need to freeze the tape because we
1854                          * will now attempt to rewind/load it.
1855                          */
1856                         softc->flags &= ~SA_FLAG_TAPE_MOUNTED;
1857                         if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
1858                                 xpt_print(periph->path,
1859                                     "error %d on TUR in samount\n", error);
1860                         }
1861                 }
1862         } else {
1863                 error = sareservereleaseunit(periph, TRUE);
1864                 if (error) {
1865                         return (error);
1866                 }
1867                 ccb = cam_periph_getccb(periph, 1);
1868                 scsi_test_unit_ready(&ccb->csio, 0, sadone,
1869                     MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT);
1870                 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1871                     softc->device_stats);
1872         }
1873
1874         if ((softc->flags & SA_FLAG_TAPE_MOUNTED) == 0) {
1875                 struct scsi_read_block_limits_data *rblim = NULL;
1876                 int comp_enabled, comp_supported;
1877                 u_int8_t write_protect, guessing = 0;
1878
1879                 /*
1880                  * Clear out old state.
1881                  */
1882                 softc->flags &= ~(SA_FLAG_TAPE_WP|SA_FLAG_TAPE_WRITTEN|
1883                                   SA_FLAG_ERR_PENDING|SA_FLAG_COMP_ENABLED|
1884                                   SA_FLAG_COMP_SUPP|SA_FLAG_COMP_UNSUPP);
1885                 softc->filemarks = 0;
1886
1887                 /*
1888                  * *Very* first off, make sure we're loaded to BOT.
1889                  */
1890                 scsi_load_unload(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, FALSE,
1891                     FALSE, FALSE, 1, SSD_FULL_SIZE, REWIND_TIMEOUT);
1892                 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1893                     softc->device_stats);
1894
1895                 /*
1896                  * In case this doesn't work, do a REWIND instead
1897                  */
1898                 if (error) {
1899                         scsi_rewind(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG,
1900                             FALSE, SSD_FULL_SIZE, REWIND_TIMEOUT);
1901                         error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1902                                 softc->device_stats);
1903                 }
1904                 if (error) {
1905                         xpt_release_ccb(ccb);
1906                         goto exit;
1907                 }
1908
1909                 /*
1910                  * Do a dummy test read to force access to the
1911                  * media so that the drive will really know what's
1912                  * there. We actually don't really care what the
1913                  * blocksize on tape is and don't expect to really
1914                  * read a full record.
1915                  */
1916                 rblim = (struct  scsi_read_block_limits_data *)
1917                     malloc(8192, M_SCSISA, M_NOWAIT);
1918                 if (rblim == NULL) {
1919                         xpt_print(periph->path, "no memory for test read\n");
1920                         xpt_release_ccb(ccb);
1921                         error = ENOMEM;
1922                         goto exit;
1923                 }
1924
1925                 if ((softc->quirks & SA_QUIRK_NODREAD) == 0) {
1926                         scsi_sa_read_write(&ccb->csio, 0, sadone,
1927                             MSG_SIMPLE_Q_TAG, 1, FALSE, 0, 8192,
1928                             (void *) rblim, 8192, SSD_FULL_SIZE,
1929                             IO_TIMEOUT);
1930                         (void) cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1931                             softc->device_stats);
1932                         scsi_rewind(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG,
1933                             FALSE, SSD_FULL_SIZE, REWIND_TIMEOUT);
1934                         error = cam_periph_runccb(ccb, saerror, CAM_RETRY_SELTO,
1935                             SF_NO_PRINT | SF_RETRY_UA,
1936                             softc->device_stats);
1937                         if (error) {
1938                                 xpt_print(periph->path,
1939                                     "unable to rewind after test read\n");
1940                                 xpt_release_ccb(ccb);
1941                                 goto exit;
1942                         }
1943                 }
1944
1945                 /*
1946                  * Next off, determine block limits.
1947                  */
1948                 scsi_read_block_limits(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG,
1949                     rblim, SSD_FULL_SIZE, SCSIOP_TIMEOUT);
1950
1951                 error = cam_periph_runccb(ccb, saerror, CAM_RETRY_SELTO,
1952                     SF_NO_PRINT | SF_RETRY_UA, softc->device_stats);
1953
1954                 xpt_release_ccb(ccb);
1955
1956                 if (error != 0) {
1957                         /*
1958                          * If it's less than SCSI-2, READ BLOCK LIMITS is not
1959                          * a MANDATORY command. Anyway- it doesn't matter-
1960                          * we can proceed anyway.
1961                          */
1962                         softc->blk_gran = 0;
1963                         softc->max_blk = ~0;
1964                         softc->min_blk = 0;
1965                 } else {
1966                         if (softc->scsi_rev >= SCSI_REV_SPC) {
1967                                 softc->blk_gran = RBL_GRAN(rblim);
1968                         } else {
1969                                 softc->blk_gran = 0;
1970                         }
1971                         /*
1972                          * We take max_blk == min_blk to mean a default to
1973                          * fixed mode- but note that whatever we get out of
1974                          * sagetparams below will actually determine whether
1975                          * we are actually *in* fixed mode.
1976                          */
1977                         softc->max_blk = scsi_3btoul(rblim->maximum);
1978                         softc->min_blk = scsi_2btoul(rblim->minimum);
1979
1980
1981                 }
1982                 /*
1983                  * Next, perform a mode sense to determine
1984                  * current density, blocksize, compression etc.
1985                  */
1986                 error = sagetparams(periph, SA_PARAM_ALL,
1987                                     &softc->media_blksize,
1988                                     &softc->media_density,
1989                                     &softc->media_numblks,
1990                                     &softc->buffer_mode, &write_protect,
1991                                     &softc->speed, &comp_supported,
1992                                     &comp_enabled, &softc->comp_algorithm,
1993                                     NULL);
1994
1995                 if (error != 0) {
1996                         /*
1997                          * We could work a little harder here. We could
1998                          * adjust our attempts to get information. It
1999                          * might be an ancient tape drive. If someone
2000                          * nudges us, we'll do that.
2001                          */
2002                         goto exit;
2003                 }
2004
2005                 /*
2006                  * If no quirk has determined that this is a device that is
2007                  * preferred to be in fixed or variable mode, now is the time
2008                  * to find out.
2009                  */
2010                 if ((softc->quirks & (SA_QUIRK_FIXED|SA_QUIRK_VARIABLE)) == 0) {
2011                         guessing = 1;
2012                         /*
2013                          * This could be expensive to find out. Luckily we
2014                          * only need to do this once. If we start out in
2015                          * 'default' mode, try and set ourselves to one
2016                          * of the densities that would determine a wad
2017                          * of other stuff. Go from highest to lowest.
2018                          */
2019                         if (softc->media_density == SCSI_DEFAULT_DENSITY) {
2020                                 int i;
2021                                 static u_int8_t ctry[] = {
2022                                         SCSI_DENSITY_HALFINCH_PE,
2023                                         SCSI_DENSITY_HALFINCH_6250C,
2024                                         SCSI_DENSITY_HALFINCH_6250,
2025                                         SCSI_DENSITY_HALFINCH_1600,
2026                                         SCSI_DENSITY_HALFINCH_800,
2027                                         SCSI_DENSITY_QIC_4GB,
2028                                         SCSI_DENSITY_QIC_2GB,
2029                                         SCSI_DENSITY_QIC_525_320,
2030                                         SCSI_DENSITY_QIC_150,
2031                                         SCSI_DENSITY_QIC_120,
2032                                         SCSI_DENSITY_QIC_24,
2033                                         SCSI_DENSITY_QIC_11_9TRK,
2034                                         SCSI_DENSITY_QIC_11_4TRK,
2035                                         SCSI_DENSITY_QIC_1320,
2036                                         SCSI_DENSITY_QIC_3080,
2037                                         0
2038                                 };
2039                                 for (i = 0; ctry[i]; i++) {
2040                                         error = sasetparams(periph,
2041                                             SA_PARAM_DENSITY, 0, ctry[i],
2042                                             0, SF_NO_PRINT);
2043                                         if (error == 0) {
2044                                                 softc->media_density = ctry[i];
2045                                                 break;
2046                                         }
2047                                 }
2048                         }
2049                         switch (softc->media_density) {
2050                         case SCSI_DENSITY_QIC_11_4TRK:
2051                         case SCSI_DENSITY_QIC_11_9TRK:
2052                         case SCSI_DENSITY_QIC_24:
2053                         case SCSI_DENSITY_QIC_120:
2054                         case SCSI_DENSITY_QIC_150:
2055                         case SCSI_DENSITY_QIC_525_320:
2056                         case SCSI_DENSITY_QIC_1320:
2057                         case SCSI_DENSITY_QIC_3080:
2058                                 softc->quirks &= ~SA_QUIRK_2FM;
2059                                 softc->quirks |= SA_QUIRK_FIXED|SA_QUIRK_1FM;
2060                                 softc->last_media_blksize = 512;
2061                                 break;
2062                         case SCSI_DENSITY_QIC_4GB:
2063                         case SCSI_DENSITY_QIC_2GB:
2064                                 softc->quirks &= ~SA_QUIRK_2FM;
2065                                 softc->quirks |= SA_QUIRK_FIXED|SA_QUIRK_1FM;
2066                                 softc->last_media_blksize = 1024;
2067                                 break;
2068                         default:
2069                                 softc->last_media_blksize =
2070                                     softc->media_blksize;
2071                                 softc->quirks |= SA_QUIRK_VARIABLE;
2072                                 break;
2073                         }
2074                 }
2075
2076                 /*
2077                  * If no quirk has determined that this is a device that needs
2078                  * to have 2 Filemarks at EOD, now is the time to find out.
2079                  */
2080
2081                 if ((softc->quirks & SA_QUIRK_2FM) == 0) {
2082                         switch (softc->media_density) {
2083                         case SCSI_DENSITY_HALFINCH_800:
2084                         case SCSI_DENSITY_HALFINCH_1600:
2085                         case SCSI_DENSITY_HALFINCH_6250:
2086                         case SCSI_DENSITY_HALFINCH_6250C:
2087                         case SCSI_DENSITY_HALFINCH_PE:
2088                                 softc->quirks &= ~SA_QUIRK_1FM;
2089                                 softc->quirks |= SA_QUIRK_2FM;
2090                                 break;
2091                         default:
2092                                 break;
2093                         }
2094                 }
2095
2096                 /*
2097                  * Now validate that some info we got makes sense.
2098                  */
2099                 if ((softc->max_blk < softc->media_blksize) ||
2100                     (softc->min_blk > softc->media_blksize &&
2101                     softc->media_blksize)) {
2102                         xpt_print(periph->path,
2103                             "BLOCK LIMITS (%d..%d) could not match current "
2104                             "block settings (%d)- adjusting\n", softc->min_blk,
2105                             softc->max_blk, softc->media_blksize);
2106                         softc->max_blk = softc->min_blk =
2107                             softc->media_blksize;
2108                 }
2109
2110                 /*
2111                  * Now put ourselves into the right frame of mind based
2112                  * upon quirks...
2113                  */
2114 tryagain:
2115                 /*
2116                  * If we want to be in FIXED mode and our current blocksize
2117                  * is not equal to our last blocksize (if nonzero), try and
2118                  * set ourselves to this last blocksize (as the 'preferred'
2119                  * block size).  The initial quirkmatch at registry sets the
2120                  * initial 'last' blocksize. If, for whatever reason, this
2121                  * 'last' blocksize is zero, set the blocksize to 512,
2122                  * or min_blk if that's larger.
2123                  */
2124                 if ((softc->quirks & SA_QUIRK_FIXED) &&
2125                     (softc->quirks & SA_QUIRK_NO_MODESEL) == 0 &&
2126                     (softc->media_blksize != softc->last_media_blksize)) {
2127                         softc->media_blksize = softc->last_media_blksize;
2128                         if (softc->media_blksize == 0) {
2129                                 softc->media_blksize = 512;
2130                                 if (softc->media_blksize < softc->min_blk) {
2131                                         softc->media_blksize = softc->min_blk;
2132                                 }
2133                         }
2134                         error = sasetparams(periph, SA_PARAM_BLOCKSIZE,
2135                             softc->media_blksize, 0, 0, SF_NO_PRINT);
2136                         if (error) {
2137                                 xpt_print(periph->path,
2138                                     "unable to set fixed blocksize to %d\n",
2139                                     softc->media_blksize);
2140                                 goto exit;
2141                         }
2142                 }
2143
2144                 if ((softc->quirks & SA_QUIRK_VARIABLE) &&
2145                     (softc->media_blksize != 0)) {
2146                         softc->last_media_blksize = softc->media_blksize;
2147                         softc->media_blksize = 0;
2148                         error = sasetparams(periph, SA_PARAM_BLOCKSIZE,
2149                             0, 0, 0, SF_NO_PRINT);
2150                         if (error) {
2151                                 /*
2152                                  * If this fails and we were guessing, just
2153                                  * assume that we got it wrong and go try
2154                                  * fixed block mode. Don't even check against
2155                                  * density code at this point.
2156                                  */
2157                                 if (guessing) {
2158                                         softc->quirks &= ~SA_QUIRK_VARIABLE;
2159                                         softc->quirks |= SA_QUIRK_FIXED;
2160                                         if (softc->last_media_blksize == 0)
2161                                                 softc->last_media_blksize = 512;
2162                                         goto tryagain;
2163                                 }
2164                                 xpt_print(periph->path,
2165                                     "unable to set variable blocksize\n");
2166                                 goto exit;
2167                         }
2168                 }
2169
2170                 /*
2171                  * Now that we have the current block size,
2172                  * set up some parameters for sastart's usage.
2173                  */
2174                 if (softc->media_blksize) {
2175                         softc->flags |= SA_FLAG_FIXED;
2176                         if (powerof2(softc->media_blksize)) {
2177                                 softc->blk_shift =
2178                                     ffs(softc->media_blksize) - 1;
2179                                 softc->blk_mask = softc->media_blksize - 1;
2180                         } else {
2181                                 softc->blk_mask = ~0;
2182                                 softc->blk_shift = 0;
2183                         }
2184                 } else {
2185                         /*
2186                          * The SCSI-3 spec allows 0 to mean "unspecified".
2187                          * The SCSI-1 spec allows 0 to mean 'infinite'.
2188                          *
2189                          * Either works here.
2190                          */
2191                         if (softc->max_blk == 0) {
2192                                 softc->max_blk = ~0;
2193                         }
2194                         softc->blk_shift = 0;
2195                         if (softc->blk_gran != 0) {
2196                                 softc->blk_mask = softc->blk_gran - 1;
2197                         } else {
2198                                 softc->blk_mask = 0;
2199                         }
2200                 }
2201
2202                 if (write_protect)
2203                         softc->flags |= SA_FLAG_TAPE_WP;
2204
2205                 if (comp_supported) {
2206                         if (softc->saved_comp_algorithm == 0)
2207                                 softc->saved_comp_algorithm =
2208                                     softc->comp_algorithm;
2209                         softc->flags |= SA_FLAG_COMP_SUPP;
2210                         if (comp_enabled)
2211                                 softc->flags |= SA_FLAG_COMP_ENABLED;
2212                 } else
2213                         softc->flags |= SA_FLAG_COMP_UNSUPP;
2214
2215                 if ((softc->buffer_mode == SMH_SA_BUF_MODE_NOBUF) &&
2216                     (softc->quirks & SA_QUIRK_NO_MODESEL) == 0) {
2217                         error = sasetparams(periph, SA_PARAM_BUFF_MODE, 0,
2218                             0, 0, SF_NO_PRINT);
2219                         if (error == 0) {
2220                                 softc->buffer_mode = SMH_SA_BUF_MODE_SIBUF;
2221                         } else {
2222                                 xpt_print(periph->path,
2223                                     "unable to set buffered mode\n");
2224                         }
2225                         error = 0;      /* not an error */
2226                 }
2227
2228
2229                 if (error == 0) {
2230                         softc->flags |= SA_FLAG_TAPE_MOUNTED;
2231                 }
2232 exit:
2233                 if (rblim != NULL)
2234                         free(rblim, M_SCSISA);
2235
2236                 if (error != 0) {
2237                         softc->dsreg = MTIO_DSREG_NIL;
2238                 } else {
2239                         softc->fileno = softc->blkno = 0;
2240                         softc->dsreg = MTIO_DSREG_REST;
2241                 }
2242 #ifdef  SA_1FM_AT_EOD
2243                 if ((softc->quirks & SA_QUIRK_2FM) == 0)
2244                         softc->quirks |= SA_QUIRK_1FM;
2245 #else
2246                 if ((softc->quirks & SA_QUIRK_1FM) == 0)
2247                         softc->quirks |= SA_QUIRK_2FM;
2248 #endif
2249         } else
2250                 xpt_release_ccb(ccb);
2251
2252         /*
2253          * If we return an error, we're not mounted any more,
2254          * so release any device reservation.
2255          */
2256         if (error != 0) {
2257                 (void) sareservereleaseunit(periph, FALSE);
2258         } else {
2259                 /*
2260                  * Clear I/O residual.
2261                  */
2262                 softc->last_io_resid = 0;
2263                 softc->last_ctl_resid = 0;
2264         }
2265         return (error);
2266 }
2267
2268 /*
2269  * How many filemarks do we need to write if we were to terminate the
2270  * tape session right now? Note that this can be a negative number
2271  */
2272
2273 static int
2274 samarkswanted(struct cam_periph *periph)
2275 {
2276         int     markswanted;
2277         struct  sa_softc *softc;
2278
2279         softc = (struct sa_softc *)periph->softc;
2280         markswanted = 0;
2281         if ((softc->flags & SA_FLAG_TAPE_WRITTEN) != 0) {
2282                 markswanted++;
2283                 if (softc->quirks & SA_QUIRK_2FM)
2284                         markswanted++;
2285         }
2286         markswanted -= softc->filemarks;
2287         return (markswanted);
2288 }
2289
2290 static int
2291 sacheckeod(struct cam_periph *periph)
2292 {
2293         int     error;
2294         int     markswanted;
2295
2296         markswanted = samarkswanted(periph);
2297
2298         if (markswanted > 0) {
2299                 error = sawritefilemarks(periph, markswanted, FALSE);
2300         } else {
2301                 error = 0;
2302         }
2303         return (error);
2304 }
2305
2306 static int
2307 saerror(union ccb *ccb, u_int32_t cflgs, u_int32_t sflgs)
2308 {
2309         static const char *toobig =
2310             "%d-byte tape record bigger than supplied buffer\n";
2311         struct  cam_periph *periph;
2312         struct  sa_softc *softc;
2313         struct  ccb_scsiio *csio;
2314         struct  scsi_sense_data *sense;
2315         uint64_t resid = 0;
2316         int64_t info = 0;
2317         cam_status status;
2318         int error_code, sense_key, asc, ascq, error, aqvalid, stream_valid;
2319         int sense_len;
2320         uint8_t stream_bits;
2321
2322         periph = xpt_path_periph(ccb->ccb_h.path);
2323         softc = (struct sa_softc *)periph->softc;
2324         csio = &ccb->csio;
2325         sense = &csio->sense_data;
2326         sense_len = csio->sense_len - csio->sense_resid;
2327         scsi_extract_sense_len(sense, sense_len, &error_code, &sense_key,
2328             &asc, &ascq, /*show_errors*/ 1);
2329         if (asc != -1 && ascq != -1)
2330                 aqvalid = 1;
2331         else
2332                 aqvalid = 0;
2333         if (scsi_get_stream_info(sense, sense_len, NULL, &stream_bits) == 0)
2334                 stream_valid = 1;
2335         else
2336                 stream_valid = 0;
2337         error = 0;
2338
2339         status = csio->ccb_h.status & CAM_STATUS_MASK;
2340
2341         /*
2342          * Calculate/latch up, any residuals... We do this in a funny 2-step
2343          * so we can print stuff here if we have CAM_DEBUG enabled for this
2344          * unit.
2345          */
2346         if (status == CAM_SCSI_STATUS_ERROR) {
2347                 if (scsi_get_sense_info(sense, sense_len, SSD_DESC_INFO, &resid,
2348                                         &info) == 0) {
2349                         if ((softc->flags & SA_FLAG_FIXED) != 0)
2350                                 resid *= softc->media_blksize;
2351                 } else {
2352                         resid = csio->dxfer_len;
2353                         info = resid;
2354                         if ((softc->flags & SA_FLAG_FIXED) != 0) {
2355                                 if (softc->media_blksize)
2356                                         info /= softc->media_blksize;
2357                         }
2358                 }
2359                 if (CCB_Type(csio) == SA_CCB_BUFFER_IO) {
2360                         bcopy((caddr_t) sense, (caddr_t) &softc->last_io_sense,
2361                             sizeof (struct scsi_sense_data));
2362                         bcopy(csio->cdb_io.cdb_bytes, softc->last_io_cdb,
2363                             (int) csio->cdb_len);
2364                         softc->last_io_resid = resid;
2365                         softc->last_resid_was_io = 1;
2366                 } else {
2367                         bcopy((caddr_t) sense, (caddr_t) &softc->last_ctl_sense,
2368                             sizeof (struct scsi_sense_data));
2369                         bcopy(csio->cdb_io.cdb_bytes, softc->last_ctl_cdb,
2370                             (int) csio->cdb_len);
2371                         softc->last_ctl_resid = resid;
2372                         softc->last_resid_was_io = 0;
2373                 }
2374                 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, ("CDB[0]=0x%x Key 0x%x "
2375                     "ASC/ASCQ 0x%x/0x%x CAM STATUS 0x%x flags 0x%x resid %jd "
2376                     "dxfer_len %d\n", csio->cdb_io.cdb_bytes[0] & 0xff,
2377                     sense_key, asc, ascq, status,
2378                     (stream_valid) ? stream_bits : 0, (intmax_t)resid,
2379                     csio->dxfer_len));
2380         } else {
2381                 CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
2382                     ("Cam Status 0x%x\n", status));
2383         }
2384
2385         switch (status) {
2386         case CAM_REQ_CMP:
2387                 return (0);
2388         case CAM_SCSI_STATUS_ERROR:
2389                 /*
2390                  * If a read/write command, we handle it here.
2391                  */
2392                 if (CCB_Type(csio) != SA_CCB_WAITING) {
2393                         break;
2394                 }
2395                 /*
2396                  * If this was just EOM/EOP, Filemark, Setmark or ILI detected
2397                  * on a non read/write command, we assume it's not an error
2398                  * and propagate the residule and return.
2399                  */
2400                 if ((aqvalid && asc == 0 && ascq > 0 && ascq <= 5) ||
2401                     (aqvalid == 0 && sense_key == SSD_KEY_NO_SENSE)) {
2402                         csio->resid = resid;
2403                         QFRLS(ccb);
2404                         return (0);
2405                 }
2406                 /*
2407                  * Otherwise, we let the common code handle this.
2408                  */
2409                 return (cam_periph_error(ccb, cflgs, sflgs, &softc->saved_ccb));
2410
2411         /*
2412          * XXX: To Be Fixed
2413          * We cannot depend upon CAM honoring retry counts for these.
2414          */
2415         case CAM_SCSI_BUS_RESET:
2416         case CAM_BDR_SENT:
2417                 if (ccb->ccb_h.retry_count <= 0) {
2418                         return (EIO);
2419                 }
2420                 /* FALLTHROUGH */
2421         default:
2422                 return (cam_periph_error(ccb, cflgs, sflgs, &softc->saved_ccb));
2423         }
2424
2425         /*
2426          * Handle filemark, end of tape, mismatched record sizes....
2427          * From this point out, we're only handling read/write cases.
2428          * Handle writes && reads differently.
2429          */
2430
2431         if (csio->cdb_io.cdb_bytes[0] == SA_WRITE) {
2432                 if (sense_key == SSD_KEY_VOLUME_OVERFLOW) {
2433                         csio->resid = resid;
2434                         error = ENOSPC;
2435                 } else if ((stream_valid != 0) && (stream_bits & SSD_EOM)) {
2436                         softc->flags |= SA_FLAG_EOM_PENDING;
2437                         /*
2438                          * Grotesque as it seems, the few times
2439                          * I've actually seen a non-zero resid,
2440                          * the tape drive actually lied and had
2441                          * written all the data!.
2442                          */
2443                         csio->resid = 0;
2444                 }
2445         } else {
2446                 csio->resid = resid;
2447                 if (sense_key == SSD_KEY_BLANK_CHECK) {
2448                         if (softc->quirks & SA_QUIRK_1FM) {
2449                                 error = 0;
2450                                 softc->flags |= SA_FLAG_EOM_PENDING;
2451                         } else {
2452                                 error = EIO;
2453                         }
2454                 } else if ((stream_valid != 0) && (stream_bits & SSD_FILEMARK)){
2455                         if (softc->flags & SA_FLAG_FIXED) {
2456                                 error = -1;
2457                                 softc->flags |= SA_FLAG_EOF_PENDING;
2458                         }
2459                         /*
2460                          * Unconditionally, if we detected a filemark on a read,
2461                          * mark that we've run moved a file ahead.
2462                          */
2463                         if (softc->fileno != (daddr_t) -1) {
2464                                 softc->fileno++;
2465                                 softc->blkno = 0;
2466                                 csio->ccb_h.ccb_pflags |= SA_POSITION_UPDATED;
2467                         }
2468                 }
2469         }
2470
2471         /*
2472          * Incorrect Length usually applies to read, but can apply to writes.
2473          */
2474         if (error == 0 && (stream_valid != 0) && (stream_bits & SSD_ILI)) {
2475                 if (info < 0) {
2476                         xpt_print(csio->ccb_h.path, toobig,
2477                             csio->dxfer_len - info);
2478                         csio->resid = csio->dxfer_len;
2479                         error = EIO;
2480                 } else {
2481                         csio->resid = resid;
2482                         if (softc->flags & SA_FLAG_FIXED) {
2483                                 softc->flags |= SA_FLAG_EIO_PENDING;
2484                         }
2485                         /*
2486                          * Bump the block number if we hadn't seen a filemark.
2487                          * Do this independent of errors (we've moved anyway).
2488                          */
2489                         if ((stream_valid == 0) ||
2490                             (stream_bits & SSD_FILEMARK) == 0) {
2491                                 if (softc->blkno != (daddr_t) -1) {
2492                                         softc->blkno++;
2493                                         csio->ccb_h.ccb_pflags |=
2494                                            SA_POSITION_UPDATED;
2495                                 }
2496                         }
2497                 }
2498         }
2499
2500         if (error <= 0) {
2501                 /*
2502                  * Unfreeze the queue if frozen as we're not returning anything
2503                  * to our waiters that would indicate an I/O error has occurred
2504                  * (yet).
2505                  */
2506                 QFRLS(ccb);
2507                 error = 0;
2508         }
2509         return (error);
2510 }
2511
2512 static int
2513 sagetparams(struct cam_periph *periph, sa_params params_to_get,
2514             u_int32_t *blocksize, u_int8_t *density, u_int32_t *numblocks,
2515             int *buff_mode, u_int8_t *write_protect, u_int8_t *speed,
2516             int *comp_supported, int *comp_enabled, u_int32_t *comp_algorithm,
2517             sa_comp_t *tcs)
2518 {
2519         union ccb *ccb;
2520         void *mode_buffer;
2521         struct scsi_mode_header_6 *mode_hdr;
2522         struct scsi_mode_blk_desc *mode_blk;
2523         int mode_buffer_len;
2524         struct sa_softc *softc;
2525         u_int8_t cpage;
2526         int error;
2527         cam_status status;
2528
2529         softc = (struct sa_softc *)periph->softc;
2530         ccb = cam_periph_getccb(periph, 1);
2531         if (softc->quirks & SA_QUIRK_NO_CPAGE)
2532                 cpage = SA_DEVICE_CONFIGURATION_PAGE;
2533         else
2534                 cpage = SA_DATA_COMPRESSION_PAGE;
2535
2536 retry:
2537         mode_buffer_len = sizeof(*mode_hdr) + sizeof(*mode_blk);
2538
2539         if (params_to_get & SA_PARAM_COMPRESSION) {
2540                 if (softc->quirks & SA_QUIRK_NOCOMP) {
2541                         *comp_supported = FALSE;
2542                         params_to_get &= ~SA_PARAM_COMPRESSION;
2543                 } else
2544                         mode_buffer_len += sizeof (sa_comp_t);
2545         }
2546
2547         /* XXX Fix M_NOWAIT */
2548         mode_buffer = malloc(mode_buffer_len, M_SCSISA, M_NOWAIT | M_ZERO);
2549         if (mode_buffer == NULL) {
2550                 xpt_release_ccb(ccb);
2551                 return (ENOMEM);
2552         }
2553         mode_hdr = (struct scsi_mode_header_6 *)mode_buffer;
2554         mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1];
2555
2556         /* it is safe to retry this */
2557         scsi_mode_sense(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, FALSE,
2558             SMS_PAGE_CTRL_CURRENT, (params_to_get & SA_PARAM_COMPRESSION) ?
2559             cpage : SMS_VENDOR_SPECIFIC_PAGE, mode_buffer, mode_buffer_len,
2560             SSD_FULL_SIZE, SCSIOP_TIMEOUT);
2561
2562         error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
2563             softc->device_stats);
2564
2565         status = ccb->ccb_h.status & CAM_STATUS_MASK;
2566
2567         if (error == EINVAL && (params_to_get & SA_PARAM_COMPRESSION) != 0) {
2568                 /*
2569                  * Hmm. Let's see if we can try another page...
2570                  * If we've already done that, give up on compression
2571                  * for this device and remember this for the future
2572                  * and attempt the request without asking for compression
2573                  * info.
2574                  */
2575                 if (cpage == SA_DATA_COMPRESSION_PAGE) {
2576                         cpage = SA_DEVICE_CONFIGURATION_PAGE;
2577                         goto retry;
2578                 }
2579                 softc->quirks |= SA_QUIRK_NOCOMP;
2580                 free(mode_buffer, M_SCSISA);
2581                 goto retry;
2582         } else if (status == CAM_SCSI_STATUS_ERROR) {
2583                 /* Tell the user about the fatal error. */
2584                 scsi_sense_print(&ccb->csio);
2585                 goto sagetparamsexit;
2586         }
2587
2588         /*
2589          * If the user only wants the compression information, and
2590          * the device doesn't send back the block descriptor, it's
2591          * no big deal.  If the user wants more than just
2592          * compression, though, and the device doesn't pass back the
2593          * block descriptor, we need to send another mode sense to
2594          * get the block descriptor.
2595          */
2596         if ((mode_hdr->blk_desc_len == 0) &&
2597             (params_to_get & SA_PARAM_COMPRESSION) &&
2598             (params_to_get & ~(SA_PARAM_COMPRESSION))) {
2599
2600                 /*
2601                  * Decrease the mode buffer length by the size of
2602                  * the compression page, to make sure the data
2603                  * there doesn't get overwritten.
2604                  */
2605                 mode_buffer_len -= sizeof (sa_comp_t);
2606
2607                 /*
2608                  * Now move the compression page that we presumably
2609                  * got back down the memory chunk a little bit so
2610                  * it doesn't get spammed.
2611                  */
2612                 bcopy(&mode_hdr[0], &mode_hdr[1], sizeof (sa_comp_t));
2613                 bzero(&mode_hdr[0], sizeof (mode_hdr[0]));
2614
2615                 /*
2616                  * Now, we issue another mode sense and just ask
2617                  * for the block descriptor, etc.
2618                  */
2619
2620                 scsi_mode_sense(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, FALSE,
2621                     SMS_PAGE_CTRL_CURRENT, SMS_VENDOR_SPECIFIC_PAGE,
2622                     mode_buffer, mode_buffer_len, SSD_FULL_SIZE,
2623                     SCSIOP_TIMEOUT);
2624
2625                 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
2626                     softc->device_stats);
2627
2628                 if (error != 0)
2629                         goto sagetparamsexit;
2630         }
2631
2632         if (params_to_get & SA_PARAM_BLOCKSIZE)
2633                 *blocksize = scsi_3btoul(mode_blk->blklen);
2634
2635         if (params_to_get & SA_PARAM_NUMBLOCKS)
2636                 *numblocks = scsi_3btoul(mode_blk->nblocks);
2637
2638         if (params_to_get & SA_PARAM_BUFF_MODE)
2639                 *buff_mode = mode_hdr->dev_spec & SMH_SA_BUF_MODE_MASK;
2640
2641         if (params_to_get & SA_PARAM_DENSITY)
2642                 *density = mode_blk->density;
2643
2644         if (params_to_get & SA_PARAM_WP)
2645                 *write_protect = (mode_hdr->dev_spec & SMH_SA_WP)? TRUE : FALSE;
2646
2647         if (params_to_get & SA_PARAM_SPEED)
2648                 *speed = mode_hdr->dev_spec & SMH_SA_SPEED_MASK;
2649
2650         if (params_to_get & SA_PARAM_COMPRESSION) {
2651                 sa_comp_t *ntcs = (sa_comp_t *) &mode_blk[1];
2652                 if (cpage == SA_DATA_COMPRESSION_PAGE) {
2653                         struct scsi_data_compression_page *cp = &ntcs->dcomp;
2654                         *comp_supported =
2655                             (cp->dce_and_dcc & SA_DCP_DCC)? TRUE : FALSE;
2656                         *comp_enabled =
2657                             (cp->dce_and_dcc & SA_DCP_DCE)? TRUE : FALSE;
2658                         *comp_algorithm = scsi_4btoul(cp->comp_algorithm);
2659                 } else {
2660                         struct scsi_dev_conf_page *cp = &ntcs->dconf;
2661                         /*
2662                          * We don't really know whether this device supports
2663                          * Data Compression if the algorithm field is
2664                          * zero. Just say we do.
2665                          */
2666                         *comp_supported = TRUE;
2667                         *comp_enabled =
2668                             (cp->sel_comp_alg != SA_COMP_NONE)? TRUE : FALSE;
2669                         *comp_algorithm = cp->sel_comp_alg;
2670                 }
2671                 if (tcs != NULL)
2672                         bcopy(ntcs, tcs, sizeof (sa_comp_t));
2673         }
2674
2675         if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
2676                 int idx;
2677                 char *xyz = mode_buffer;
2678                 xpt_print_path(periph->path);
2679                 printf("Mode Sense Data=");
2680                 for (idx = 0; idx < mode_buffer_len; idx++)
2681                         printf(" 0x%02x", xyz[idx] & 0xff);
2682                 printf("\n");
2683         }
2684
2685 sagetparamsexit:
2686
2687         xpt_release_ccb(ccb);
2688         free(mode_buffer, M_SCSISA);
2689         return (error);
2690 }
2691
2692 /*
2693  * The purpose of this function is to set one of four different parameters
2694  * for a tape drive:
2695  *      - blocksize
2696  *      - density
2697  *      - compression / compression algorithm
2698  *      - buffering mode
2699  *
2700  * The assumption is that this will be called from saioctl(), and therefore
2701  * from a process context.  Thus the waiting malloc calls below.  If that
2702  * assumption ever changes, the malloc calls should be changed to be
2703  * NOWAIT mallocs.
2704  *
2705  * Any or all of the four parameters may be set when this function is
2706  * called.  It should handle setting more than one parameter at once.
2707  */
2708 static int
2709 sasetparams(struct cam_periph *periph, sa_params params_to_set,
2710             u_int32_t blocksize, u_int8_t density, u_int32_t calg,
2711             u_int32_t sense_flags)
2712 {
2713         struct sa_softc *softc;
2714         u_int32_t current_blocksize;
2715         u_int32_t current_calg;
2716         u_int8_t current_density;
2717         u_int8_t current_speed;
2718         int comp_enabled, comp_supported;
2719         void *mode_buffer;
2720         int mode_buffer_len;
2721         struct scsi_mode_header_6 *mode_hdr;
2722         struct scsi_mode_blk_desc *mode_blk;
2723         sa_comp_t *ccomp, *cpage;
2724         int buff_mode;
2725         union ccb *ccb = NULL;
2726         int error;
2727
2728         softc = (struct sa_softc *)periph->softc;
2729
2730         ccomp = malloc(sizeof (sa_comp_t), M_SCSISA, M_NOWAIT);
2731         if (ccomp == NULL)
2732                 return (ENOMEM);
2733
2734         /*
2735          * Since it doesn't make sense to set the number of blocks, or
2736          * write protection, we won't try to get the current value.  We
2737          * always want to get the blocksize, so we can set it back to the
2738          * proper value.
2739          */
2740         error = sagetparams(periph,
2741             params_to_set | SA_PARAM_BLOCKSIZE | SA_PARAM_SPEED,
2742             &current_blocksize, &current_density, NULL, &buff_mode, NULL,
2743             &current_speed, &comp_supported, &comp_enabled,
2744             &current_calg, ccomp);
2745
2746         if (error != 0) {
2747                 free(ccomp, M_SCSISA);
2748                 return (error);
2749         }
2750
2751         mode_buffer_len = sizeof(*mode_hdr) + sizeof(*mode_blk);
2752         if (params_to_set & SA_PARAM_COMPRESSION)
2753                 mode_buffer_len += sizeof (sa_comp_t);
2754
2755         mode_buffer = malloc(mode_buffer_len, M_SCSISA, M_NOWAIT | M_ZERO);
2756         if (mode_buffer == NULL) {
2757                 free(ccomp, M_SCSISA);
2758                 return (ENOMEM);
2759         }
2760
2761         mode_hdr = (struct scsi_mode_header_6 *)mode_buffer;
2762         mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1];
2763
2764         ccb = cam_periph_getccb(periph, 1);
2765
2766 retry:
2767
2768         if (params_to_set & SA_PARAM_COMPRESSION) {
2769                 if (mode_blk) {
2770                         cpage = (sa_comp_t *)&mode_blk[1];
2771                 } else {
2772                         cpage = (sa_comp_t *)&mode_hdr[1];
2773                 }
2774                 bcopy(ccomp, cpage, sizeof (sa_comp_t));
2775                 cpage->hdr.pagecode &= ~0x80;
2776         } else
2777                 cpage = NULL;
2778
2779         /*
2780          * If the caller wants us to set the blocksize, use the one they
2781          * pass in.  Otherwise, use the blocksize we got back from the
2782          * mode select above.
2783          */
2784         if (mode_blk) {
2785                 if (params_to_set & SA_PARAM_BLOCKSIZE)
2786                         scsi_ulto3b(blocksize, mode_blk->blklen);
2787                 else
2788                         scsi_ulto3b(current_blocksize, mode_blk->blklen);
2789
2790                 /*
2791                  * Set density if requested, else preserve old density.
2792                  * SCSI_SAME_DENSITY only applies to SCSI-2 or better
2793                  * devices, else density we've latched up in our softc.
2794                  */
2795                 if (params_to_set & SA_PARAM_DENSITY) {
2796                         mode_blk->density = density;
2797                 } else if (softc->scsi_rev > SCSI_REV_CCS) {
2798                         mode_blk->density = SCSI_SAME_DENSITY;
2799                 } else {
2800                         mode_blk->density = softc->media_density;
2801                 }
2802         }
2803
2804         /*
2805          * For mode selects, these two fields must be zero.
2806          */
2807         mode_hdr->data_length = 0;
2808         mode_hdr->medium_type = 0;
2809
2810         /* set the speed to the current value */
2811         mode_hdr->dev_spec = current_speed;
2812
2813         /* if set, set single-initiator buffering mode */
2814         if (softc->buffer_mode == SMH_SA_BUF_MODE_SIBUF) {
2815                 mode_hdr->dev_spec |= SMH_SA_BUF_MODE_SIBUF;
2816         }
2817
2818         if (mode_blk)
2819                 mode_hdr->blk_desc_len = sizeof(struct scsi_mode_blk_desc);
2820         else
2821                 mode_hdr->blk_desc_len = 0;
2822
2823         /*
2824          * First, if the user wants us to set the compression algorithm or
2825          * just turn compression on, check to make sure that this drive
2826          * supports compression.
2827          */
2828         if (params_to_set & SA_PARAM_COMPRESSION) {
2829                 /*
2830                  * If the compression algorithm is 0, disable compression.
2831                  * If the compression algorithm is non-zero, enable
2832                  * compression and set the compression type to the
2833                  * specified compression algorithm, unless the algorithm is
2834                  * MT_COMP_ENABLE.  In that case, we look at the
2835                  * compression algorithm that is currently set and if it is
2836                  * non-zero, we leave it as-is.  If it is zero, and we have
2837                  * saved a compression algorithm from a time when
2838                  * compression was enabled before, set the compression to
2839                  * the saved value.
2840                  */
2841                 switch (ccomp->hdr.pagecode & ~0x80) {
2842                 case SA_DEVICE_CONFIGURATION_PAGE:
2843                 {
2844                         struct scsi_dev_conf_page *dcp = &cpage->dconf;
2845                         if (calg == 0) {
2846                                 dcp->sel_comp_alg = SA_COMP_NONE;
2847                                 break;
2848                         }
2849                         if (calg != MT_COMP_ENABLE) {
2850                                 dcp->sel_comp_alg = calg;
2851                         } else if (dcp->sel_comp_alg == SA_COMP_NONE &&
2852                             softc->saved_comp_algorithm != 0) {
2853                                 dcp->sel_comp_alg = softc->saved_comp_algorithm;
2854                         }
2855                         break;
2856                 }
2857                 case SA_DATA_COMPRESSION_PAGE:
2858                 if (ccomp->dcomp.dce_and_dcc & SA_DCP_DCC) {
2859                         struct scsi_data_compression_page *dcp = &cpage->dcomp;
2860                         if (calg == 0) {
2861                                 /*
2862                                  * Disable compression, but leave the
2863                                  * decompression and the capability bit
2864                                  * alone.
2865                                  */
2866                                 dcp->dce_and_dcc = SA_DCP_DCC;
2867                                 dcp->dde_and_red |= SA_DCP_DDE;
2868                                 break;
2869                         }
2870                         /* enable compression && decompression */
2871                         dcp->dce_and_dcc = SA_DCP_DCE | SA_DCP_DCC;
2872                         dcp->dde_and_red |= SA_DCP_DDE;
2873                         /*
2874                          * If there, use compression algorithm from caller.
2875                          * Otherwise, if there's a saved compression algorithm
2876                          * and there is no current algorithm, use the saved
2877                          * algorithm. Else parrot back what we got and hope
2878                          * for the best.
2879                          */
2880                         if (calg != MT_COMP_ENABLE) {
2881                                 scsi_ulto4b(calg, dcp->comp_algorithm);
2882                                 scsi_ulto4b(calg, dcp->decomp_algorithm);
2883                         } else if (scsi_4btoul(dcp->comp_algorithm) == 0 &&
2884                             softc->saved_comp_algorithm != 0) {
2885                                 scsi_ulto4b(softc->saved_comp_algorithm,
2886                                     dcp->comp_algorithm);
2887                                 scsi_ulto4b(softc->saved_comp_algorithm,
2888                                     dcp->decomp_algorithm);
2889                         }
2890                         break;
2891                 }
2892                 /*
2893                  * Compression does not appear to be supported-
2894                  * at least via the DATA COMPRESSION page. It
2895                  * would be too much to ask us to believe that
2896                  * the page itself is supported, but incorrectly
2897                  * reports an ability to manipulate data compression,
2898                  * so we'll assume that this device doesn't support
2899                  * compression. We can just fall through for that.
2900                  */
2901                 /* FALLTHROUGH */
2902                 default:
2903                         /*
2904                          * The drive doesn't seem to support compression,
2905                          * so turn off the set compression bit.
2906                          */
2907                         params_to_set &= ~SA_PARAM_COMPRESSION;
2908                         xpt_print(periph->path,
2909                             "device does not seem to support compression\n");
2910
2911                         /*
2912                          * If that was the only thing the user wanted us to set,
2913                          * clean up allocated resources and return with
2914                          * 'operation not supported'.
2915                          */
2916                         if (params_to_set == SA_PARAM_NONE) {
2917                                 free(mode_buffer, M_SCSISA);
2918                                 xpt_release_ccb(ccb);
2919                                 return (ENODEV);
2920                         }
2921
2922                         /*
2923                          * That wasn't the only thing the user wanted us to set.
2924                          * So, decrease the stated mode buffer length by the
2925                          * size of the compression mode page.
2926                          */
2927                         mode_buffer_len -= sizeof(sa_comp_t);
2928                 }
2929         }
2930
2931         /* It is safe to retry this operation */
2932         scsi_mode_select(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG,
2933             (params_to_set & SA_PARAM_COMPRESSION)? TRUE : FALSE,
2934             FALSE, mode_buffer, mode_buffer_len, SSD_FULL_SIZE, SCSIOP_TIMEOUT);
2935
2936         error = cam_periph_runccb(ccb, saerror, 0,
2937             sense_flags, softc->device_stats);
2938
2939         if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
2940                 int idx;
2941                 char *xyz = mode_buffer;
2942                 xpt_print_path(periph->path);
2943                 printf("Err%d, Mode Select Data=", error);
2944                 for (idx = 0; idx < mode_buffer_len; idx++)
2945                         printf(" 0x%02x", xyz[idx] & 0xff);
2946                 printf("\n");
2947         }
2948
2949
2950         if (error) {
2951                 /*
2952                  * If we can, try without setting density/blocksize.
2953                  */
2954                 if (mode_blk) {
2955                         if ((params_to_set &
2956                             (SA_PARAM_DENSITY|SA_PARAM_BLOCKSIZE)) == 0) {
2957                                 mode_blk = NULL;
2958                                 goto retry;
2959                         }
2960                 } else {
2961                         mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1];
2962                         cpage = (sa_comp_t *)&mode_blk[1];
2963                 }
2964
2965                 /*
2966                  * If we were setting the blocksize, and that failed, we
2967                  * want to set it to its original value.  If we weren't
2968                  * setting the blocksize, we don't want to change it.
2969                  */
2970                 scsi_ulto3b(current_blocksize, mode_blk->blklen);
2971
2972                 /*
2973                  * Set density if requested, else preserve old density.
2974                  * SCSI_SAME_DENSITY only applies to SCSI-2 or better
2975                  * devices, else density we've latched up in our softc.
2976                  */
2977                 if (params_to_set & SA_PARAM_DENSITY) {
2978                         mode_blk->density = current_density;
2979                 } else if (softc->scsi_rev > SCSI_REV_CCS) {
2980                         mode_blk->density = SCSI_SAME_DENSITY;
2981                 } else {
2982                         mode_blk->density = softc->media_density;
2983                 }
2984
2985                 if (params_to_set & SA_PARAM_COMPRESSION)
2986                         bcopy(ccomp, cpage, sizeof (sa_comp_t));
2987
2988                 /*
2989                  * The retry count is the only CCB field that might have been
2990                  * changed that we care about, so reset it back to 1.
2991                  */
2992                 ccb->ccb_h.retry_count = 1;
2993                 cam_periph_runccb(ccb, saerror, 0, sense_flags,
2994                     softc->device_stats);
2995         }
2996
2997         xpt_release_ccb(ccb);
2998
2999         if (ccomp != NULL)
3000                 free(ccomp, M_SCSISA);
3001
3002         if (params_to_set & SA_PARAM_COMPRESSION) {
3003                 if (error) {
3004                         softc->flags &= ~SA_FLAG_COMP_ENABLED;
3005                         /*
3006                          * Even if we get an error setting compression,
3007                          * do not say that we don't support it. We could
3008                          * have been wrong, or it may be media specific.
3009                          *      softc->flags &= ~SA_FLAG_COMP_SUPP;
3010                          */
3011                         softc->saved_comp_algorithm = softc->comp_algorithm;
3012                         softc->comp_algorithm = 0;
3013                 } else {
3014                         softc->flags |= SA_FLAG_COMP_ENABLED;
3015                         softc->comp_algorithm = calg;
3016                 }
3017         }
3018
3019         free(mode_buffer, M_SCSISA);
3020         return (error);
3021 }
3022
3023 static void
3024 saprevent(struct cam_periph *periph, int action)
3025 {
3026         struct  sa_softc *softc;
3027         union   ccb *ccb;
3028         int     error, sf;
3029
3030         softc = (struct sa_softc *)periph->softc;
3031
3032         if ((action == PR_ALLOW) && (softc->flags & SA_FLAG_TAPE_LOCKED) == 0)
3033                 return;
3034         if ((action == PR_PREVENT) && (softc->flags & SA_FLAG_TAPE_LOCKED) != 0)
3035                 return;
3036
3037         /*
3038          * We can be quiet about illegal requests.
3039          */
3040         if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
3041                 sf = 0;
3042         } else
3043                 sf = SF_QUIET_IR;
3044
3045         ccb = cam_periph_getccb(periph, 1);
3046
3047         /* It is safe to retry this operation */
3048         scsi_prevent(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, action,
3049             SSD_FULL_SIZE, SCSIOP_TIMEOUT);
3050
3051         error = cam_periph_runccb(ccb, saerror, 0, sf, softc->device_stats);
3052         if (error == 0) {
3053                 if (action == PR_ALLOW)
3054                         softc->flags &= ~SA_FLAG_TAPE_LOCKED;
3055                 else
3056                         softc->flags |= SA_FLAG_TAPE_LOCKED;
3057         }
3058
3059         xpt_release_ccb(ccb);
3060 }
3061
3062 static int
3063 sarewind(struct cam_periph *periph)
3064 {
3065         union   ccb *ccb;
3066         struct  sa_softc *softc;
3067         int     error;
3068
3069         softc = (struct sa_softc *)periph->softc;
3070
3071         ccb = cam_periph_getccb(periph, 1);
3072
3073         /* It is safe to retry this operation */
3074         scsi_rewind(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, FALSE,
3075             SSD_FULL_SIZE, REWIND_TIMEOUT);
3076
3077         softc->dsreg = MTIO_DSREG_REW;
3078         error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
3079         softc->dsreg = MTIO_DSREG_REST;
3080
3081         xpt_release_ccb(ccb);
3082         if (error == 0)
3083                 softc->fileno = softc->blkno = (daddr_t) 0;
3084         else
3085                 softc->fileno = softc->blkno = (daddr_t) -1;
3086         return (error);
3087 }
3088
3089 static int
3090 saspace(struct cam_periph *periph, int count, scsi_space_code code)
3091 {
3092         union   ccb *ccb;
3093         struct  sa_softc *softc;
3094         int     error;
3095
3096         softc = (struct sa_softc *)periph->softc;
3097
3098         ccb = cam_periph_getccb(periph, 1);
3099
3100         /* This cannot be retried */
3101
3102         scsi_space(&ccb->csio, 0, sadone, MSG_SIMPLE_Q_TAG, code, count,
3103             SSD_FULL_SIZE, SPACE_TIMEOUT);
3104
3105         /*
3106          * Clear residual because we will be using it.
3107          */
3108         softc->last_ctl_resid = 0;
3109
3110         softc->dsreg = (count < 0)? MTIO_DSREG_REV : MTIO_DSREG_FWD;
3111         error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
3112         softc->dsreg = MTIO_DSREG_REST;
3113
3114         xpt_release_ccb(ccb);
3115
3116         /*
3117          * If a spacing operation has failed, we need to invalidate
3118          * this mount.
3119          *
3120          * If the spacing operation was setmarks or to end of recorded data,
3121          * we no longer know our relative position.
3122          *
3123          * If the spacing operations was spacing files in reverse, we
3124          * take account of the residual, but still check against less
3125          * than zero- if we've gone negative, we must have hit BOT.
3126          *
3127          * If the spacing operations was spacing records in reverse and
3128          * we have a residual, we've either hit BOT or hit a filemark.
3129          * In the former case, we know our new record number (0). In
3130          * the latter case, we have absolutely no idea what the real
3131          * record number is- we've stopped between the end of the last
3132          * record in the previous file and the filemark that stopped
3133          * our spacing backwards.
3134          */
3135         if (error) {
3136                 softc->fileno = softc->blkno = (daddr_t) -1;
3137         } else if (code == SS_SETMARKS || code == SS_EOD) {
3138                 softc->fileno = softc->blkno = (daddr_t) -1;
3139         } else if (code == SS_FILEMARKS && softc->fileno != (daddr_t) -1) {
3140                 softc->fileno += (count - softc->last_ctl_resid);
3141                 if (softc->fileno < 0)  /* we must of hit BOT */
3142                         softc->fileno = 0;
3143                 softc->blkno = 0;
3144         } else if (code == SS_BLOCKS && softc->blkno != (daddr_t) -1) {
3145                 softc->blkno += (count - softc->last_ctl_resid);
3146                 if (count < 0) {
3147                         if (softc->last_ctl_resid || softc->blkno < 0) {
3148                                 if (softc->fileno == 0) {
3149                                         softc->blkno = 0;
3150                                 } else {
3151                                         softc->blkno = (daddr_t) -1;
3152                                 }
3153                         }
3154                 }
3155         }
3156         return (error);
3157 }
3158
3159 static int
3160 sawritefilemarks(struct cam_periph *periph, int nmarks, int setmarks)
3161 {
3162         union   ccb *ccb;
3163         struct  sa_softc *softc;
3164         int     error, nwm = 0;
3165
3166         softc = (struct sa_softc *)periph->softc;
3167         if (softc->open_rdonly)
3168                 return (EBADF);
3169
3170         ccb = cam_periph_getccb(periph, 1);
3171         /*
3172          * Clear residual because we will be using it.
3173          */
3174         softc->last_ctl_resid = 0;
3175
3176         softc->dsreg = MTIO_DSREG_FMK;
3177         /* this *must* not be retried */
3178         scsi_write_filemarks(&ccb->csio, 0, sadone, MSG_SIMPLE_Q_TAG,
3179             FALSE, setmarks, nmarks, SSD_FULL_SIZE, IO_TIMEOUT);
3180         softc->dsreg = MTIO_DSREG_REST;
3181
3182
3183         error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
3184
3185         if (error == 0 && nmarks) {
3186                 struct sa_softc *softc = (struct sa_softc *)periph->softc;
3187                 nwm = nmarks - softc->last_ctl_resid;
3188                 softc->filemarks += nwm;
3189         }
3190
3191         xpt_release_ccb(ccb);
3192
3193         /*
3194          * Update relative positions (if we're doing that).
3195          */
3196         if (error) {
3197                 softc->fileno = softc->blkno = (daddr_t) -1;
3198         } else if (softc->fileno != (daddr_t) -1) {
3199                 softc->fileno += nwm;
3200                 softc->blkno = 0;
3201         }
3202         return (error);
3203 }
3204
3205 static int
3206 sardpos(struct cam_periph *periph, int hard, u_int32_t *blkptr)
3207 {
3208         struct scsi_tape_position_data loc;
3209         union ccb *ccb;
3210         struct sa_softc *softc = (struct sa_softc *)periph->softc;
3211         int error;
3212
3213         /*
3214          * We try and flush any buffered writes here if we were writing
3215          * and we're trying to get hardware block position. It eats
3216          * up performance substantially, but I'm wary of drive firmware.
3217          *
3218          * I think that *logical* block position is probably okay-
3219          * but hardware block position might have to wait for data
3220          * to hit media to be valid. Caveat Emptor.
3221          */
3222
3223         if (hard && (softc->flags & SA_FLAG_TAPE_WRITTEN)) {
3224                 error = sawritefilemarks(periph, 0, 0);
3225                 if (error && error != EACCES)
3226                         return (error);
3227         }
3228
3229         ccb = cam_periph_getccb(periph, 1);
3230         scsi_read_position(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG,
3231             hard, &loc, SSD_FULL_SIZE, SCSIOP_TIMEOUT);
3232         softc->dsreg = MTIO_DSREG_RBSY;
3233         error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
3234         softc->dsreg = MTIO_DSREG_REST;
3235
3236         if (error == 0) {
3237                 if (loc.flags & SA_RPOS_UNCERTAIN) {
3238                         error = EINVAL;         /* nothing is certain */
3239                 } else {
3240                         *blkptr = scsi_4btoul(loc.firstblk);
3241                 }
3242         }
3243
3244         xpt_release_ccb(ccb);
3245         return (error);
3246 }
3247
3248 static int
3249 sasetpos(struct cam_periph *periph, int hard, u_int32_t *blkptr)
3250 {
3251         union ccb *ccb;
3252         struct sa_softc *softc;
3253         int error;
3254
3255         /*
3256          * We used to try and flush any buffered writes here.
3257          * Now we push this onto user applications to either
3258          * flush the pending writes themselves (via a zero count
3259          * WRITE FILEMARKS command) or they can trust their tape
3260          * drive to do this correctly for them.
3261          */
3262
3263         softc = (struct sa_softc *)periph->softc;
3264         ccb = cam_periph_getccb(periph, 1);
3265
3266
3267         scsi_set_position(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG,
3268             hard, *blkptr, SSD_FULL_SIZE, SPACE_TIMEOUT);
3269
3270
3271         softc->dsreg = MTIO_DSREG_POS;
3272         error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
3273         softc->dsreg = MTIO_DSREG_REST;
3274         xpt_release_ccb(ccb);
3275         /*
3276          * Note relative file && block number position as now unknown.
3277          */
3278         softc->fileno = softc->blkno = (daddr_t) -1;
3279         return (error);
3280 }
3281
3282 static int
3283 saretension(struct cam_periph *periph)
3284 {
3285         union ccb *ccb;
3286         struct sa_softc *softc;
3287         int error;
3288
3289         softc = (struct sa_softc *)periph->softc;
3290
3291         ccb = cam_periph_getccb(periph, 1);
3292
3293         /* It is safe to retry this operation */
3294         scsi_load_unload(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, FALSE,
3295             FALSE, TRUE,  TRUE, SSD_FULL_SIZE, ERASE_TIMEOUT);
3296
3297         softc->dsreg = MTIO_DSREG_TEN;
3298         error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
3299         softc->dsreg = MTIO_DSREG_REST;
3300
3301         xpt_release_ccb(ccb);
3302         if (error == 0)
3303                 softc->fileno = softc->blkno = (daddr_t) 0;
3304         else
3305                 softc->fileno = softc->blkno = (daddr_t) -1;
3306         return (error);
3307 }
3308
3309 static int
3310 sareservereleaseunit(struct cam_periph *periph, int reserve)
3311 {
3312         union ccb *ccb;
3313         struct sa_softc *softc;
3314         int error;
3315
3316         softc = (struct sa_softc *)periph->softc;
3317         ccb = cam_periph_getccb(periph,  1);
3318
3319         /* It is safe to retry this operation */
3320         scsi_reserve_release_unit(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG,
3321             FALSE,  0, SSD_FULL_SIZE,  SCSIOP_TIMEOUT, reserve);
3322         softc->dsreg = MTIO_DSREG_RBSY;
3323         error = cam_periph_runccb(ccb, saerror, 0,
3324             SF_RETRY_UA | SF_NO_PRINT, softc->device_stats);
3325         softc->dsreg = MTIO_DSREG_REST;
3326         xpt_release_ccb(ccb);
3327
3328         /*
3329          * If the error was Illegal Request, then the device doesn't support
3330          * RESERVE/RELEASE. This is not an error.
3331          */
3332         if (error == EINVAL) {
3333                 error = 0;
3334         }
3335
3336         return (error);
3337 }
3338
3339 static int
3340 saloadunload(struct cam_periph *periph, int load)
3341 {
3342         union   ccb *ccb;
3343         struct  sa_softc *softc;
3344         int     error;
3345
3346         softc = (struct sa_softc *)periph->softc;
3347
3348         ccb = cam_periph_getccb(periph, 1);
3349
3350         /* It is safe to retry this operation */
3351         scsi_load_unload(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, FALSE,
3352             FALSE, FALSE, load, SSD_FULL_SIZE, REWIND_TIMEOUT);
3353
3354         softc->dsreg = (load)? MTIO_DSREG_LD : MTIO_DSREG_UNL;
3355         error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
3356         softc->dsreg = MTIO_DSREG_REST;
3357         xpt_release_ccb(ccb);
3358
3359         if (error || load == 0)
3360                 softc->fileno = softc->blkno = (daddr_t) -1;
3361         else if (error == 0)
3362                 softc->fileno = softc->blkno = (daddr_t) 0;
3363         return (error);
3364 }
3365
3366 static int
3367 saerase(struct cam_periph *periph, int longerase)
3368 {
3369
3370         union   ccb *ccb;
3371         struct  sa_softc *softc;
3372         int error;
3373
3374         softc = (struct sa_softc *)periph->softc;
3375         if (softc->open_rdonly)
3376                 return (EBADF);
3377
3378         ccb = cam_periph_getccb(periph, 1);
3379
3380         scsi_erase(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG, FALSE, longerase,
3381             SSD_FULL_SIZE, ERASE_TIMEOUT);
3382
3383         softc->dsreg = MTIO_DSREG_ZER;
3384         error = cam_periph_runccb(ccb, saerror, 0, 0, softc->device_stats);
3385         softc->dsreg = MTIO_DSREG_REST;
3386
3387         xpt_release_ccb(ccb);
3388         return (error);
3389 }
3390
3391 #endif /* _KERNEL */
3392
3393 /*
3394  * Read tape block limits command.
3395  */
3396 void
3397 scsi_read_block_limits(struct ccb_scsiio *csio, u_int32_t retries,
3398                    void (*cbfcnp)(struct cam_periph *, union ccb *),
3399                    u_int8_t tag_action,
3400                    struct scsi_read_block_limits_data *rlimit_buf,
3401                    u_int8_t sense_len, u_int32_t timeout)
3402 {
3403         struct scsi_read_block_limits *scsi_cmd;
3404
3405         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_IN, tag_action,
3406              (u_int8_t *)rlimit_buf, sizeof(*rlimit_buf), sense_len,
3407              sizeof(*scsi_cmd), timeout);
3408
3409         scsi_cmd = (struct scsi_read_block_limits *)&csio->cdb_io.cdb_bytes;
3410         bzero(scsi_cmd, sizeof(*scsi_cmd));
3411         scsi_cmd->opcode = READ_BLOCK_LIMITS;
3412 }
3413
3414 void
3415 scsi_sa_read_write(struct ccb_scsiio *csio, u_int32_t retries,
3416                    void (*cbfcnp)(struct cam_periph *, union ccb *),
3417                    u_int8_t tag_action, int readop, int sli,
3418                    int fixed, u_int32_t length, u_int8_t *data_ptr,
3419                    u_int32_t dxfer_len, u_int8_t sense_len, u_int32_t timeout)
3420 {
3421         struct scsi_sa_rw *scsi_cmd;
3422
3423         scsi_cmd = (struct scsi_sa_rw *)&csio->cdb_io.cdb_bytes;
3424         scsi_cmd->opcode = readop ? SA_READ : SA_WRITE;
3425         scsi_cmd->sli_fixed = 0;
3426         if (sli && readop)
3427                 scsi_cmd->sli_fixed |= SAR_SLI;
3428         if (fixed)
3429                 scsi_cmd->sli_fixed |= SARW_FIXED;
3430         scsi_ulto3b(length, scsi_cmd->length);
3431         scsi_cmd->control = 0;
3432
3433         cam_fill_csio(csio, retries, cbfcnp, readop ? CAM_DIR_IN : CAM_DIR_OUT,
3434             tag_action, data_ptr, dxfer_len, sense_len,
3435             sizeof(*scsi_cmd), timeout);
3436 }
3437
3438 void
3439 scsi_load_unload(struct ccb_scsiio *csio, u_int32_t retries,
3440                  void (*cbfcnp)(struct cam_periph *, union ccb *),
3441                  u_int8_t tag_action, int immediate, int eot,
3442                  int reten, int load, u_int8_t sense_len,
3443                  u_int32_t timeout)
3444 {
3445         struct scsi_load_unload *scsi_cmd;
3446
3447         scsi_cmd = (struct scsi_load_unload *)&csio->cdb_io.cdb_bytes;
3448         bzero(scsi_cmd, sizeof(*scsi_cmd));
3449         scsi_cmd->opcode = LOAD_UNLOAD;
3450         if (immediate)
3451                 scsi_cmd->immediate = SLU_IMMED;
3452         if (eot)
3453                 scsi_cmd->eot_reten_load |= SLU_EOT;
3454         if (reten)
3455                 scsi_cmd->eot_reten_load |= SLU_RETEN;
3456         if (load)
3457                 scsi_cmd->eot_reten_load |= SLU_LOAD;
3458
3459         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action,
3460             NULL, 0, sense_len, sizeof(*scsi_cmd), timeout);
3461 }
3462
3463 void
3464 scsi_rewind(struct ccb_scsiio *csio, u_int32_t retries,
3465             void (*cbfcnp)(struct cam_periph *, union ccb *),
3466             u_int8_t tag_action, int immediate, u_int8_t sense_len,
3467             u_int32_t timeout)
3468 {
3469         struct scsi_rewind *scsi_cmd;
3470
3471         scsi_cmd = (struct scsi_rewind *)&csio->cdb_io.cdb_bytes;
3472         bzero(scsi_cmd, sizeof(*scsi_cmd));
3473         scsi_cmd->opcode = REWIND;
3474         if (immediate)
3475                 scsi_cmd->immediate = SREW_IMMED;
3476
3477         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
3478             0, sense_len, sizeof(*scsi_cmd), timeout);
3479 }
3480
3481 void
3482 scsi_space(struct ccb_scsiio *csio, u_int32_t retries,
3483            void (*cbfcnp)(struct cam_periph *, union ccb *),
3484            u_int8_t tag_action, scsi_space_code code,
3485            u_int32_t count, u_int8_t sense_len, u_int32_t timeout)
3486 {
3487         struct scsi_space *scsi_cmd;
3488
3489         scsi_cmd = (struct scsi_space *)&csio->cdb_io.cdb_bytes;
3490         scsi_cmd->opcode = SPACE;
3491         scsi_cmd->code = code;
3492         scsi_ulto3b(count, scsi_cmd->count);
3493         scsi_cmd->control = 0;
3494
3495         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
3496             0, sense_len, sizeof(*scsi_cmd), timeout);
3497 }
3498
3499 void
3500 scsi_write_filemarks(struct ccb_scsiio *csio, u_int32_t retries,
3501                      void (*cbfcnp)(struct cam_periph *, union ccb *),
3502                      u_int8_t tag_action, int immediate, int setmark,
3503                      u_int32_t num_marks, u_int8_t sense_len,
3504                      u_int32_t timeout)
3505 {
3506         struct scsi_write_filemarks *scsi_cmd;
3507
3508         scsi_cmd = (struct scsi_write_filemarks *)&csio->cdb_io.cdb_bytes;
3509         bzero(scsi_cmd, sizeof(*scsi_cmd));
3510         scsi_cmd->opcode = WRITE_FILEMARKS;
3511         if (immediate)
3512                 scsi_cmd->byte2 |= SWFMRK_IMMED;
3513         if (setmark)
3514                 scsi_cmd->byte2 |= SWFMRK_WSMK;
3515
3516         scsi_ulto3b(num_marks, scsi_cmd->num_marks);
3517
3518         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
3519             0, sense_len, sizeof(*scsi_cmd), timeout);
3520 }
3521
3522 /*
3523  * The reserve and release unit commands differ only by their opcodes.
3524  */
3525 void
3526 scsi_reserve_release_unit(struct ccb_scsiio *csio, u_int32_t retries,
3527                           void (*cbfcnp)(struct cam_periph *, union ccb *),
3528                           u_int8_t tag_action, int third_party,
3529                           int third_party_id, u_int8_t sense_len,
3530                           u_int32_t timeout, int reserve)
3531 {
3532         struct scsi_reserve_release_unit *scsi_cmd;
3533
3534         scsi_cmd = (struct scsi_reserve_release_unit *)&csio->cdb_io.cdb_bytes;
3535         bzero(scsi_cmd, sizeof(*scsi_cmd));
3536
3537         if (reserve)
3538                 scsi_cmd->opcode = RESERVE_UNIT;
3539         else
3540                 scsi_cmd->opcode = RELEASE_UNIT;
3541
3542         if (third_party) {
3543                 scsi_cmd->lun_thirdparty |= SRRU_3RD_PARTY;
3544                 scsi_cmd->lun_thirdparty |=
3545                         ((third_party_id << SRRU_3RD_SHAMT) & SRRU_3RD_MASK);
3546         }
3547
3548         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
3549             0, sense_len, sizeof(*scsi_cmd), timeout);
3550 }
3551
3552 void
3553 scsi_erase(struct ccb_scsiio *csio, u_int32_t retries,
3554            void (*cbfcnp)(struct cam_periph *, union ccb *),
3555            u_int8_t tag_action, int immediate, int long_erase,
3556            u_int8_t sense_len, u_int32_t timeout)
3557 {
3558         struct scsi_erase *scsi_cmd;
3559
3560         scsi_cmd = (struct scsi_erase *)&csio->cdb_io.cdb_bytes;
3561         bzero(scsi_cmd, sizeof(*scsi_cmd));
3562
3563         scsi_cmd->opcode = ERASE;
3564
3565         if (immediate)
3566                 scsi_cmd->lun_imm_long |= SE_IMMED;
3567
3568         if (long_erase)
3569                 scsi_cmd->lun_imm_long |= SE_LONG;
3570
3571         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
3572             0, sense_len, sizeof(*scsi_cmd), timeout);
3573 }
3574
3575 /*
3576  * Read Tape Position command.
3577  */
3578 void
3579 scsi_read_position(struct ccb_scsiio *csio, u_int32_t retries,
3580                    void (*cbfcnp)(struct cam_periph *, union ccb *),
3581                    u_int8_t tag_action, int hardsoft,
3582                    struct scsi_tape_position_data *sbp,
3583                    u_int8_t sense_len, u_int32_t timeout)
3584 {
3585         struct scsi_tape_read_position *scmd;
3586
3587         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_IN, tag_action,
3588             (u_int8_t *)sbp, sizeof (*sbp), sense_len, sizeof(*scmd), timeout);
3589         scmd = (struct scsi_tape_read_position *)&csio->cdb_io.cdb_bytes;
3590         bzero(scmd, sizeof(*scmd));
3591         scmd->opcode = READ_POSITION;
3592         scmd->byte1 = hardsoft;
3593 }
3594
3595 /*
3596  * Set Tape Position command.
3597  */
3598 void
3599 scsi_set_position(struct ccb_scsiio *csio, u_int32_t retries,
3600                    void (*cbfcnp)(struct cam_periph *, union ccb *),
3601                    u_int8_t tag_action, int hardsoft, u_int32_t blkno,
3602                    u_int8_t sense_len, u_int32_t timeout)
3603 {
3604         struct scsi_tape_locate *scmd;
3605
3606         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action,
3607             (u_int8_t *)NULL, 0, sense_len, sizeof(*scmd), timeout);
3608         scmd = (struct scsi_tape_locate *)&csio->cdb_io.cdb_bytes;
3609         bzero(scmd, sizeof(*scmd));
3610         scmd->opcode = LOCATE;
3611         if (hardsoft)
3612                 scmd->byte1 |= SA_SPOS_BT;
3613         scsi_ulto4b(blkno, scmd->blkaddr);
3614 }