sys/bus/cam/scsi/scsi_sa.c

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