sys/bus/cam/scsi/scsi_sa.c

   1 /*
   2  * $FreeBSD: src/sys/cam/scsi/scsi_sa.c,v 1.45.2.13 2002/12/17 17:08:50 trhodes Exp $
   3  * $DragonFly: src/sys/bus/cam/scsi/scsi_sa.c,v 1.11 2004/05/13 23:49:11 dillon Exp $
   4  *
   5  * Implementation of SCSI Sequential Access Peripheral driver for CAM.
   6  *
   7  * Copyright (c) 1999, 2000 Matthew Jacob
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions, and the following disclaimer,
  15  *    without modification, immediately at the beginning of the file.
  16  * 2. The name of the author may not be used to endorse or promote products
  17  *    derived from this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  23  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  */
  32
  33 #include <sys/param.h>
  34 #include <sys/queue.h>
  35 #ifdef _KERNEL
  36 #include <sys/systm.h>
  37 #include <sys/kernel.h>
  38 #endif
  39 #include <sys/types.h>
  40 #ifdef _KERNEL
  41 #include <sys/buf.h>
  42 #include <sys/malloc.h>
  43 #endif
  44 #include <sys/mtio.h>
  45 #include <sys/conf.h>
  46 #ifdef _KERNEL
  47 #include <sys/proc.h>
  48 #include <sys/buf2.h>
  49 #endif
  50 #include <sys/devicestat.h>
  51 #include <machine/limits.h>
  52
  53 #ifndef _KERNEL
  54 #include <stdio.h>
  55 #include <string.h>
  56 #endif
  57
  58 #include "../cam.h"
  59 #include "../cam_ccb.h"
  60 #include "../cam_extend.h"
  61 #include "../cam_periph.h"
  62 #include "../cam_xpt_periph.h"
  63 #include "../cam_debug.h"
  64
  65 #include "scsi_all.h"
  66 #include "scsi_message.h"
  67 #include "scsi_sa.h"
  68
  69 #ifdef _KERNEL
  70
  71 #include <opt_sa.h>
  72
  73 #ifndef SA_IO_TIMEOUT
  74 #define SA_IO_TIMEOUT           4
  75 #endif
  76 #ifndef SA_SPACE_TIMEOUT
  77 #define SA_SPACE_TIMEOUT        1 * 60
  78 #endif
  79 #ifndef SA_REWIND_TIMEOUT
  80 #define SA_REWIND_TIMEOUT       2 * 60
  81 #endif
  82 #ifndef SA_ERASE_TIMEOUT
  83 #define SA_ERASE_TIMEOUT        4 * 60
  84 #endif
  85
  86 #define SCSIOP_TIMEOUT          (60 * 1000)     /* not an option */
  87
  88 #define IO_TIMEOUT              (SA_IO_TIMEOUT * 60 * 1000)
  89 #define REWIND_TIMEOUT          (SA_REWIND_TIMEOUT * 60 * 1000)
  90 #define ERASE_TIMEOUT           (SA_ERASE_TIMEOUT * 60 * 1000)
  91 #define SPACE_TIMEOUT           (SA_SPACE_TIMEOUT * 60 * 1000)
  92
  93 /*
  94  * Additional options that can be set for config: SA_1FM_AT_EOT
  95  */
  96
  97 #ifndef UNUSED_PARAMETER
  98 #define UNUSED_PARAMETER(x)     x = x
  99 #endif
 100
 101 #define QFRLS(ccb)      \
 102         if (((ccb)->ccb_h.status & CAM_DEV_QFRZN) != 0) \
 103                 cam_release_devq((ccb)->ccb_h.path, 0, 0, 0, FALSE)
 104
 105 /*
 106  * Driver states
 107  */
 108
 109
 110 typedef enum {
 111         SA_STATE_NORMAL, SA_STATE_ABNORMAL
 112 } sa_state;
 113
 114 #define ccb_pflags      ppriv_field0
 115 #define ccb_bp          ppriv_ptr1
 116
 117 #define SA_CCB_BUFFER_IO        0x0
 118 #define SA_CCB_WAITING          0x1
 119 #define SA_CCB_TYPEMASK         0x1
 120 #define SA_POSITION_UPDATED     0x2
 121
 122 #define Set_CCB_Type(x, type)                           \
 123         x->ccb_h.ccb_pflags &= ~SA_CCB_TYPEMASK;        \
 124         x->ccb_h.ccb_pflags |= type
 125
 126 #define CCB_Type(x)     (x->ccb_h.ccb_pflags & SA_CCB_TYPEMASK)
 127
 128
 129
 130 typedef enum {
 131         SA_FLAG_OPEN            = 0x0001,
 132         SA_FLAG_FIXED           = 0x0002,
 133         SA_FLAG_TAPE_LOCKED     = 0x0004,
 134         SA_FLAG_TAPE_MOUNTED    = 0x0008,
 135         SA_FLAG_TAPE_WP         = 0x0010,
 136         SA_FLAG_TAPE_WRITTEN    = 0x0020,
 137         SA_FLAG_EOM_PENDING     = 0x0040,
 138         SA_FLAG_EIO_PENDING     = 0x0080,
 139         SA_FLAG_EOF_PENDING     = 0x0100,
 140         SA_FLAG_ERR_PENDING     = (SA_FLAG_EOM_PENDING|SA_FLAG_EIO_PENDING|
 141                                    SA_FLAG_EOF_PENDING),
 142         SA_FLAG_INVALID         = 0x0200,
 143         SA_FLAG_COMP_ENABLED    = 0x0400,
 144         SA_FLAG_COMP_SUPP       = 0x0800,
 145         SA_FLAG_COMP_UNSUPP     = 0x1000,
 146         SA_FLAG_TAPE_FROZEN     = 0x2000
 147 } sa_flags;
 148
 149 typedef enum {
 150         SA_MODE_REWIND          = 0x00,
 151         SA_MODE_NOREWIND        = 0x01,
 152         SA_MODE_OFFLINE         = 0x02
 153 } sa_mode;
 154
 155 typedef enum {
 156         SA_PARAM_NONE           = 0x00,
 157         SA_PARAM_BLOCKSIZE      = 0x01,
 158         SA_PARAM_DENSITY        = 0x02,
 159         SA_PARAM_COMPRESSION    = 0x04,
 160         SA_PARAM_BUFF_MODE      = 0x08,
 161         SA_PARAM_NUMBLOCKS      = 0x10,
 162         SA_PARAM_WP             = 0x20,
 163         SA_PARAM_SPEED          = 0x40,
 164         SA_PARAM_ALL            = 0x7f
 165 } sa_params;
 166
 167 typedef enum {
 168         SA_QUIRK_NONE           = 0x00,
 169         SA_QUIRK_NOCOMP         = 0x01, /* Can't deal with compression at all */
 170         SA_QUIRK_FIXED          = 0x02, /* Force fixed mode */
 171         SA_QUIRK_VARIABLE       = 0x04, /* Force variable mode */
 172         SA_QUIRK_2FM            = 0x08, /* Needs Two File Marks at EOD */
 173         SA_QUIRK_1FM            = 0x10, /* No more than 1 File Mark at EOD */
 174         SA_QUIRK_NODREAD        = 0x20, /* Don't try and dummy read density */
 175         SA_QUIRK_NO_MODESEL     = 0x40, /* Don't do mode select at all */
 176         SA_QUIRK_NO_CPAGE       = 0x80  /* Don't use DEVICE COMPRESSION page */
 177 } sa_quirks;
 178
 179 /* units are bits 4-7, 16-21 (1024 units) */
 180 #define SAUNIT(DEV) \
 181         (((minor(DEV) & 0xF0) >> 4) |  ((minor(DEV) & 0x3f0000) >> 16))
 182
 183 #define SAMODE(z) ((minor(z) & 0x3))
 184 #define SADENSITY(z) (((minor(z) >> 2) & 0x3))
 185 #define SA_IS_CTRL(z) (minor(z) & (1 << 29))
 186
 187 #define SA_NOT_CTLDEV   0
 188 #define SA_CTLDEV       1
 189
 190 #define SA_ATYPE_R      0
 191 #define SA_ATYPE_NR     1
 192 #define SA_ATYPE_ER     2
 193
 194 #define SAMINOR(ctl, unit, mode, access) \
 195         ((ctl << 29) | ((unit & 0x3f0) << 16) | ((unit & 0xf) << 4) | \
 196         (mode << 0x2) | (access & 0x3))
 197
 198 #define SA_NUM_MODES    4
 199 struct sa_devs {
 200         dev_t   ctl_dev;
 201         struct sa_mode_devs {
 202                 dev_t   r_dev;
 203                 dev_t   nr_dev;
 204                 dev_t   er_dev;
 205         } mode_devs[SA_NUM_MODES];
 206         dev_t   r_dev;
 207         dev_t   nr_dev;
 208         dev_t   er_dev;
 209 };
 210
 211 struct sa_softc {
 212         sa_state        state;
 213         sa_flags        flags;
 214         sa_quirks       quirks;
 215         struct          buf_queue_head buf_queue;
 216         int             queue_count;
 217         struct          devstat device_stats;
 218         struct sa_devs  devs;
 219         int             blk_gran;
 220         int             blk_mask;
 221         int             blk_shift;
 222         u_int32_t       max_blk;
 223         u_int32_t       min_blk;
 224         u_int32_t       comp_algorithm;
 225         u_int32_t       saved_comp_algorithm;
 226         u_int32_t       media_blksize;
 227         u_int32_t       last_media_blksize;
 228         u_int32_t       media_numblks;
 229         u_int8_t        media_density;
 230         u_int8_t        speed;
 231         u_int8_t        scsi_rev;
 232         u_int8_t        dsreg;          /* mtio mt_dsreg, redux */
 233         int             buffer_mode;
 234         int             filemarks;
 235         union           ccb saved_ccb;
 236         int             last_resid_was_io;
 237
 238         /*
 239          * Relative to BOT Location.
 240          */
 241         daddr_t         fileno;
 242         daddr_t         blkno;
 243
 244         /*
 245          * Latched Error Info
 246          */
 247         struct {
 248                 struct scsi_sense_data _last_io_sense;
 249                 u_int32_t _last_io_resid;
 250                 u_int8_t _last_io_cdb[CAM_MAX_CDBLEN];
 251                 struct scsi_sense_data _last_ctl_sense;
 252                 u_int32_t _last_ctl_resid;
 253                 u_int8_t _last_ctl_cdb[CAM_MAX_CDBLEN];
 254 #define last_io_sense   errinfo._last_io_sense
 255 #define last_io_resid   errinfo._last_io_resid
 256 #define last_io_cdb     errinfo._last_io_cdb
 257 #define last_ctl_sense  errinfo._last_ctl_sense
 258 #define last_ctl_resid  errinfo._last_ctl_resid
 259 #define last_ctl_cdb    errinfo._last_ctl_cdb
 260         } errinfo;
 261         /*
 262          * Misc other flags/state
 263          */
 264         u_int32_t
 265                                 : 31,
 266                 ctrl_mode       : 1;    /* control device open */
 267 };
 268
 269 struct sa_quirk_entry {
 270         struct scsi_inquiry_pattern inq_pat;    /* matching pattern */
 271         sa_quirks quirks;       /* specific quirk type */
 272         u_int32_t prefblk;      /* preferred blocksize when in fixed mode */
 273 };
 274
 275 static struct sa_quirk_entry sa_quirk_table[] =
 276 {
 277         {
 278                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "OnStream",
 279                   "ADR*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_NODREAD |
 280                    SA_QUIRK_1FM|SA_QUIRK_NO_MODESEL, 32768
 281         },
 282         {
 283                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
 284                   "Python 06408*", "*"}, SA_QUIRK_NODREAD, 0
 285         },
 286         {
 287                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
 288                   "Python 25601*", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_NODREAD, 0
 289         },
 290         {
 291                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
 292                   "Python*", "*"}, SA_QUIRK_NODREAD, 0
 293         },
 294         {
 295                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
 296                   "VIPER 150*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512
 297         },
 298         {
 299                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
 300                   "VIPER 2525 25462", "-011"},
 301                   SA_QUIRK_NOCOMP|SA_QUIRK_1FM|SA_QUIRK_NODREAD, 0
 302         },
 303         {
 304                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "ARCHIVE",
 305                   "VIPER 2525*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 1024
 306         },
 307 #if     0
 308         {
 309                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
 310                   "C15*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_NO_CPAGE, 0,
 311         },
 312 #endif
 313         {
 314                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
 315                   "C56*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0
 316         },
 317         {
 318                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
 319                   "T20*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512
 320         },
 321         {
 322                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
 323                   "T4000*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512
 324         },
 325         {
 326                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "HP",
 327                   "HP-88780*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0
 328         },
 329         {
 330                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "KENNEDY",
 331                   "*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0
 332         },
 333         {
 334                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "M4 DATA",
 335                   "123107 SCSI*", "*"}, SA_QUIRK_VARIABLE|SA_QUIRK_2FM, 0
 336         },
 337         {       /* jreynold@primenet.com */
 338                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "Seagate",
 339                 "STT8000N*", "*"}, SA_QUIRK_1FM, 0
 340         },
 341         {       /* mike@sentex.net */
 342                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "Seagate",
 343                 "STT20000*", "*"}, SA_QUIRK_1FM, 0
 344         },
 345         {
 346                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
 347                   " TDC 3600", "U07:"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512
 348         },
 349         {
 350                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
 351                   " TDC 3800", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512
 352         },
 353         {
 354                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
 355                   " TDC 4100", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512
 356         },
 357         {
 358                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
 359                   " TDC 4200", "*"}, SA_QUIRK_NOCOMP|SA_QUIRK_1FM, 512
 360         },
 361         {
 362                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
 363                   " SLR*", "*"}, SA_QUIRK_1FM, 0
 364         },
 365         {
 366                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "WANGTEK",
 367                   "5525ES*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 512
 368         },
 369         {
 370                 { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "WANGTEK",
 371                   "51000*", "*"}, SA_QUIRK_FIXED|SA_QUIRK_1FM, 1024
 372         }
 373 };
 374
 375 static  d_open_t        saopen;
 376 static  d_close_t       saclose;
 377 static  d_strategy_t    sastrategy;
 378 static  d_ioctl_t       saioctl;
 379 static  periph_init_t   sainit;
 380 static  periph_ctor_t   saregister;
 381 static  periph_oninv_t  saoninvalidate;
 382 static  periph_dtor_t   sacleanup;
 383 static  periph_start_t  sastart;
 384 static  void            saasync(void *callback_arg, u_int32_t code,
 385                                 struct cam_path *path, void *arg);
 386 static  void            sadone(struct cam_periph *periph,
 387                                union ccb *start_ccb);
 388 static  int             saerror(union ccb *ccb, u_int32_t cam_flags,
 389                                 u_int32_t sense_flags);
 390 static int              samarkswanted(struct cam_periph *);
 391 static int              sacheckeod(struct cam_periph *periph);
 392 static int              sagetparams(struct cam_periph *periph,
 393                                     sa_params params_to_get,
 394                                     u_int32_t *blocksize, u_int8_t *density,
 395                                     u_int32_t *numblocks, int *buff_mode,
 396                                     u_int8_t *write_protect, u_int8_t *speed,
 397                                     int *comp_supported, int *comp_enabled,
 398                                     u_int32_t *comp_algorithm,
 399                                     sa_comp_t *comp_page);
 400 static int              sasetparams(struct cam_periph *periph,
 401                                     sa_params params_to_set,
 402                                     u_int32_t blocksize, u_int8_t density,
 403                                     u_int32_t comp_algorithm,
 404                                     u_int32_t sense_flags);
 405 static void             saprevent(struct cam_periph *periph, int action);
 406 static int              sarewind(struct cam_periph *periph);
 407 static int              saspace(struct cam_periph *periph, int count,
 408                                 scsi_space_code code);
 409 static int              samount(struct cam_periph *, int, dev_t);
 410 static int              saretension(struct cam_periph *periph);
 411 static int              sareservereleaseunit(struct cam_periph *periph,
 412                                              int reserve);
 413 static int              saloadunload(struct cam_periph *periph, int load);
 414 static int              saerase(struct cam_periph *periph, int longerase);
 415 static int              sawritefilemarks(struct cam_periph *periph,
 416                                          int nmarks, int setmarks);
 417 static int              sardpos(struct cam_periph *periph, int, u_int32_t *);
 418 static int              sasetpos(struct cam_periph *periph, int, u_int32_t *);
 419
 420
 421 static struct periph_driver sadriver =
 422 {
 423         sainit, "sa",
 424         TAILQ_HEAD_INITIALIZER(sadriver.units), /* generation */ 0
 425 };
 426
 427 DATA_SET(periphdriver_set, sadriver);
 428
 429 /* For 2.2-stable support */
 430 #ifndef D_TAPE
 431 #define D_TAPE 0
 432 #endif
 433
 434 #define SA_CDEV_MAJOR 14
 435
 436 static struct cdevsw sa_cdevsw = {
 437         /* name */      "sa",
 438         /* maj */       SA_CDEV_MAJOR,
 439         /* flags */     D_TAPE,
 440         /* port */      NULL,
 441         /* clone */     NULL,
 442
 443         /* open */      saopen,
 444         /* close */     saclose,
 445         /* read */      physread,
 446         /* write */     physwrite,
 447         /* ioctl */     saioctl,
 448         /* poll */      nopoll,
 449         /* mmap */      nommap,
 450         /* strategy */  sastrategy,
 451         /* dump */      nodump,
 452         /* psize */     nopsize
 453 };
 454
 455 static struct extend_array *saperiphs;
 456
 457 static int
 458 saopen(dev_t dev, int flags, int fmt, struct thread *td)
 459 {
 460         struct cam_periph *periph;
 461         struct sa_softc *softc;
 462         int unit;
 463         int mode;
 464         int density;
 465         int error;
 466         int s;
 467
 468         unit = SAUNIT(dev);
 469         mode = SAMODE(dev);
 470         density = SADENSITY(dev);
 471
 472         s = splsoftcam();
 473         periph = cam_extend_get(saperiphs, unit);
 474         if (periph == NULL) {
 475                 (void) splx(s);
 476                 return (ENXIO);
 477         }
 478         softc = (struct sa_softc *)periph->softc;
 479         if ((error = cam_periph_lock(periph, PCATCH)) != 0) {
 480                 splx(s);
 481                 return (error);
 482         }
 483         splx(s);
 484
 485         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE|CAM_DEBUG_INFO,
 486             ("saopen(%d): dev=0x%x softc=0x%x\n", unit, unit, softc->flags));
 487
 488         if (cam_periph_acquire(periph) != CAM_REQ_CMP) {
 489                 cam_periph_unlock(periph);
 490                 return (ENXIO);
 491         }
 492         if (SA_IS_CTRL(dev)) {
 493                 softc->ctrl_mode = 1;
 494                 cam_periph_unlock(periph);
 495                 return (0);
 496         }
 497
 498
 499         if (softc->flags & SA_FLAG_OPEN) {
 500                 error = EBUSY;
 501         } else if (softc->flags & SA_FLAG_INVALID) {
 502                 error = ENXIO;
 503         } else {
 504                 /*
 505                  * The function samount ensures media is loaded and ready.
 506                  * It also does a device RESERVE if the tape isn't yet mounted.
 507                  */
 508                 error = samount(periph, flags, dev);
 509         }
 510
 511         if (error) {
 512                 cam_periph_release(periph);
 513         } else {
 514                 saprevent(periph, PR_PREVENT);
 515                 softc->flags |= SA_FLAG_OPEN;
 516         }
 517         cam_periph_unlock(periph);
 518         return (error);
 519 }
 520
 521 static int
 522 saclose(dev_t dev, int flag, int fmt, struct thread *td)
 523 {
 524         struct  cam_periph *periph;
 525         struct  sa_softc *softc;
 526         int     unit, mode, error, writing, tmp;
 527         int     closedbits = SA_FLAG_OPEN;
 528
 529         unit = SAUNIT(dev);
 530         mode = SAMODE(dev);
 531         periph = cam_extend_get(saperiphs, unit);
 532         if (periph == NULL)
 533                 return (ENXIO);
 534
 535         softc = (struct sa_softc *)periph->softc;
 536
 537         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE|CAM_DEBUG_INFO,
 538             ("saclose(%d): dev=0x%x softc=0x%x\n", unit, unit, softc->flags));
 539
 540
 541         if ((error = cam_periph_lock(periph, 0)) != 0) {
 542                 return (error);
 543         }
 544
 545         if (SA_IS_CTRL(dev)) {
 546                 softc->ctrl_mode = 0;
 547                 cam_periph_release(periph);
 548                 cam_periph_unlock(periph);
 549                 return (0);
 550         }
 551
 552         /*
 553          * Were we writing the tape?
 554          */
 555         writing = (softc->flags & SA_FLAG_TAPE_WRITTEN) != 0;
 556
 557         /*
 558          * See whether or not we need to write filemarks. If this
 559          * fails, we probably have to assume we've lost tape
 560          * position.
 561          */
 562         error = sacheckeod(periph);
 563         if (error) {
 564                 xpt_print_path(periph->path);
 565                 printf("failed to write terminating filemark(s)\n");
 566                 softc->flags |= SA_FLAG_TAPE_FROZEN;
 567         }
 568
 569         /*
 570          * Whatever we end up doing, allow users to eject tapes from here on.
 571          */
 572         saprevent(periph, PR_ALLOW);
 573
 574         /*
 575          * Decide how to end...
 576          */
 577         if ((softc->flags & SA_FLAG_TAPE_MOUNTED) == 0) {
 578                 closedbits |= SA_FLAG_TAPE_FROZEN;
 579         } else switch (mode) {
 580         case SA_MODE_OFFLINE:
 581                 /*
 582                  * An 'offline' close is an unconditional release of
 583                  * frozen && mount conditions, irrespective of whether
 584                  * these operations succeeded. The reason for this is
 585                  * to allow at least some kind of programmatic way
 586                  * around our state getting all fouled up. If somebody
 587                  * issues an 'offline' command, that will be allowed
 588                  * to clear state.
 589                  */
 590                 (void) sarewind(periph);
 591                 (void) saloadunload(periph, FALSE);
 592                 closedbits |= SA_FLAG_TAPE_MOUNTED|SA_FLAG_TAPE_FROZEN;
 593                 break;
 594         case SA_MODE_REWIND:
 595                 /*
 596                  * If the rewind fails, return an error- if anyone cares,
 597                  * but not overwriting any previous error.
 598                  *
 599                  * We don't clear the notion of mounted here, but we do
 600                  * clear the notion of frozen if we successfully rewound.
 601                  */
 602                 tmp = sarewind(periph);
 603                 if (tmp) {
 604                         if (error != 0)
 605                                 error = tmp;
 606                 } else {
 607                         closedbits |= SA_FLAG_TAPE_FROZEN;
 608                 }
 609                 break;
 610         case SA_MODE_NOREWIND:
 611                 /*
 612                  * If we're not rewinding/unloading the tape, find out
 613                  * whether we need to back up over one of two filemarks
 614                  * we wrote (if we wrote two filemarks) so that appends
 615                  * from this point on will be sane.
 616                  */
 617                 if (error == 0 && writing && (softc->quirks & SA_QUIRK_2FM)) {
 618                         tmp = saspace(periph, -1, SS_FILEMARKS);
 619                         if (tmp) {
 620                                 xpt_print_path(periph->path);
 621                                 printf("unable to backspace over one of double"
 622                                    " filemarks at end of tape\n");
 623                                 xpt_print_path(periph->path);
 624                                 printf("it is possible that this device"
 625                                    " needs a SA_QUIRK_1FM quirk set for it\n");
 626                                 softc->flags |= SA_FLAG_TAPE_FROZEN;
 627                         }
 628                 }
 629                 break;
 630         default:
 631                 xpt_print_path(periph->path);
 632                 panic("unknown mode 0x%x in saclose\n", mode);
 633                 /* NOTREACHED */
 634                 break;
 635         }
 636
 637         /*
 638          * We wish to note here that there are no more filemarks to be written.
 639          */
 640         softc->filemarks = 0;
 641         softc->flags &= ~SA_FLAG_TAPE_WRITTEN;
 642
 643         /*
 644          * And we are no longer open for business.
 645          */
 646         softc->flags &= ~closedbits;
 647
 648         /*
 649          * Inform users if tape state if frozen....
 650          */
 651         if (softc->flags & SA_FLAG_TAPE_FROZEN) {
 652                 xpt_print_path(periph->path);
 653                 printf("tape is now frozen- use an OFFLINE, REWIND or MTEOM "
 654                     "command to clear this state.\n");
 655         }
 656
 657         /* release the device if it is no longer mounted */
 658         if ((softc->flags & SA_FLAG_TAPE_MOUNTED) == 0)
 659                 sareservereleaseunit(periph, FALSE);
 660
 661         cam_periph_unlock(periph);
 662         cam_periph_release(periph);
 663
 664         return (error);
 665 }
 666
 667 /*
 668  * Actually translate the requested transfer into one the physical driver
 669  * can understand.  The transfer is described by a buf and will include
 670  * only one physical transfer.
 671  */
 672 static void
 673 sastrategy(struct buf *bp)
 674 {
 675         struct cam_periph *periph;
 676         struct sa_softc *softc;
 677         u_int  unit;
 678         int    s;
 679
 680         if (SA_IS_CTRL(bp->b_dev)) {
 681                 bp->b_error = EINVAL;
 682                 goto bad;
 683         }
 684         unit = SAUNIT(bp->b_dev);
 685         periph = cam_extend_get(saperiphs, unit);
 686         if (periph == NULL) {
 687                 bp->b_error = ENXIO;
 688                 goto bad;
 689         }
 690         softc = (struct sa_softc *)periph->softc;
 691
 692         s = splsoftcam();
 693
 694         if (softc->flags & SA_FLAG_INVALID) {
 695                 splx(s);
 696                 bp->b_error = ENXIO;
 697                 goto bad;
 698         }
 699
 700         if (softc->flags & SA_FLAG_TAPE_FROZEN) {
 701                 splx(s);
 702                 bp->b_error = EPERM;
 703                 goto bad;
 704         }
 705
 706         splx(s);
 707
 708         /*
 709          * If it's a null transfer, return immediatly
 710          */
 711         if (bp->b_bcount == 0)
 712                 goto done;
 713
 714         /* valid request?  */
 715         if (softc->flags & SA_FLAG_FIXED) {
 716                 /*
 717                  * Fixed block device.  The byte count must
 718                  * be a multiple of our block size.
 719                  */
 720                 if (((softc->blk_mask != ~0) &&
 721                     ((bp->b_bcount & softc->blk_mask) != 0)) ||
 722                     ((softc->blk_mask == ~0) &&
 723                     ((bp->b_bcount % softc->min_blk) != 0))) {
 724                         xpt_print_path(periph->path);
 725                         printf("Invalid request.  Fixed block device "
 726                                "requests must be a multiple "
 727                                "of %d bytes\n", softc->media_blksize);
 728                         bp->b_error = EINVAL;
 729                         goto bad;
 730                 }
 731         } else if ((bp->b_bcount > softc->max_blk) ||
 732                    (bp->b_bcount < softc->min_blk) ||
 733                    (bp->b_bcount & softc->blk_mask) != 0) {
 734
 735                 xpt_print_path(periph->path);
 736                 printf("Invalid request.  Variable block device "
 737                     "requests must be ");
 738                 if (softc->blk_mask != 0) {
 739                         printf("a multiple of %d ", (0x1 << softc->blk_gran));
 740                 }
 741                 printf("between %d and %d bytes\n", softc->min_blk,
 742                     softc->max_blk);
 743                 bp->b_error = EINVAL;
 744                 goto bad;
 745         }
 746
 747         /*
 748          * Mask interrupts so that the device cannot be invalidated until
 749          * after we are in the queue.  Otherwise, we might not properly
 750          * clean up one of the buffers.
 751          */
 752         s = splbio();
 753
 754         /*
 755          * Place it at the end of the queue.
 756          */
 757         bufq_insert_tail(&softc->buf_queue, bp);
 758
 759         softc->queue_count++;
 760         CAM_DEBUG(periph->path, CAM_DEBUG_INFO, ("sastrategy: enqueuing a %d "
 761             "%s byte %s queue count now %d\n", (int) bp->b_bcount,
 762              (softc->flags & SA_FLAG_FIXED)?  "fixed" : "variable",
 763              (bp->b_flags & B_READ)? "read" : "write", softc->queue_count));
 764
 765         splx(s);
 766
 767         /*
 768          * Schedule ourselves for performing the work.
 769          */
 770         xpt_schedule(periph, 1);
 771
 772         return;
 773 bad:
 774         bp->b_flags |= B_ERROR;
 775 done:
 776
 777         /*
 778          * Correctly set the buf to indicate a completed xfer
 779          */
 780         bp->b_resid = bp->b_bcount;
 781         biodone(bp);
 782 }
 783
 784 static int
 785 saioctl(dev_t dev, u_long cmd, caddr_t arg, int flag, struct thread *td)
 786 {
 787         struct cam_periph *periph;
 788         struct sa_softc *softc;
 789         scsi_space_code spaceop;
 790         int didlockperiph = 0;
 791         int s;
 792         int unit;
 793         int mode;
 794         int density;
 795         int error = 0;
 796
 797         unit = SAUNIT(dev);
 798         mode = SAMODE(dev);
 799         density = SADENSITY(dev);
 800         error = 0;              /* shut up gcc */
 801         spaceop = 0;            /* shut up gcc */
 802
 803         periph = cam_extend_get(saperiphs, unit);
 804         if (periph == NULL)
 805                 return (ENXIO);
 806
 807         softc = (struct sa_softc *)periph->softc;
 808
 809         /*
 810          * Check for control mode accesses. We allow MTIOCGET and
 811          * MTIOCERRSTAT (but need to be the only one open in order
 812          * to clear latched status), and MTSETBSIZE, MTSETDNSTY
 813          * and MTCOMP (but need to be the only one accessing this
 814          * device to run those).
 815          */
 816
 817         if (SA_IS_CTRL(dev)) {
 818                 switch (cmd) {
 819                 case MTIOCGETEOTMODEL:
 820                 case MTIOCGET:
 821                         break;
 822                 case MTIOCERRSTAT:
 823                         /*
 824                          * If the periph isn't already locked, lock it
 825                          * so our MTIOCERRSTAT can reset latched error stats.
 826                          *
 827                          * If the periph is already locked, skip it because
 828                          * we're just getting status and it'll be up to the
 829                          * other thread that has this device open to do
 830                          * an MTIOCERRSTAT that would clear latched status.
 831                          */
 832                         s = splsoftcam();
 833                         if ((periph->flags & CAM_PERIPH_LOCKED) == 0) {
 834                                 error = cam_periph_lock(periph, PCATCH);
 835                                 if (error != 0) {
 836                                         splx(s);
 837                                         return (error);
 838                                 }
 839                                 didlockperiph = 1;
 840                         }
 841                         break;
 842
 843                 case MTIOCSETEOTMODEL:
 844                 case MTSETBSIZ:
 845                 case MTSETDNSTY:
 846                 case MTCOMP:
 847                         /*
 848                          * We need to acquire the peripheral here rather
 849                          * than at open time because we are sharing writable
 850                          * access to data structures.
 851                          */
 852                         s = splsoftcam();
 853                         error = cam_periph_lock(periph, PCATCH);
 854                         if (error != 0) {
 855                                 splx(s);
 856                                 return (error);
 857                         }
 858                         didlockperiph = 1;
 859                         break;
 860
 861                 default:
 862                         return (EINVAL);
 863                 }
 864         }
 865
 866         /*
 867          * Find the device that the user is talking about
 868          */
 869         switch (cmd) {
 870         case MTIOCGET:
 871         {
 872                 struct mtget *g = (struct mtget *)arg;
 873
 874                 /*
 875                  * If this isn't the control mode device, actually go out
 876                  * and ask the drive again what it's set to.
 877                  */
 878                 if (!SA_IS_CTRL(dev)) {
 879                         u_int8_t write_protect;
 880                         int comp_enabled, comp_supported;
 881                         error = sagetparams(periph, SA_PARAM_ALL,
 882                             &softc->media_blksize, &softc->media_density,
 883                             &softc->media_numblks, &softc->buffer_mode,
 884                             &write_protect, &softc->speed, &comp_supported,
 885                             &comp_enabled, &softc->comp_algorithm, NULL);
 886                         if (error)
 887                                 break;
 888                         if (write_protect)
 889                                 softc->flags |= SA_FLAG_TAPE_WP;
 890                         else
 891                                 softc->flags &= ~SA_FLAG_TAPE_WP;
 892                         softc->flags &= ~(SA_FLAG_COMP_SUPP|
 893                             SA_FLAG_COMP_ENABLED|SA_FLAG_COMP_UNSUPP);
 894                         if (comp_supported) {
 895                                 if (softc->saved_comp_algorithm == 0)
 896                                         softc->saved_comp_algorithm =
 897                                             softc->comp_algorithm;
 898                                 softc->flags |= SA_FLAG_COMP_SUPP;
 899                                 if (comp_enabled)
 900                                         softc->flags |= SA_FLAG_COMP_ENABLED;
 901                         } else
 902                                 softc->flags |= SA_FLAG_COMP_UNSUPP;
 903                 }
 904                 bzero(g, sizeof(struct mtget));
 905                 g->mt_type = MT_ISAR;
 906                 if (softc->flags & SA_FLAG_COMP_UNSUPP) {
 907                         g->mt_comp = MT_COMP_UNSUPP;
 908                         g->mt_comp0 = MT_COMP_UNSUPP;
 909                         g->mt_comp1 = MT_COMP_UNSUPP;
 910                         g->mt_comp2 = MT_COMP_UNSUPP;
 911                         g->mt_comp3 = MT_COMP_UNSUPP;
 912                 } else {
 913                         if ((softc->flags & SA_FLAG_COMP_ENABLED) == 0) {
 914                                 g->mt_comp = MT_COMP_DISABLED;
 915                         } else {
 916                                 g->mt_comp = softc->comp_algorithm;
 917                         }
 918                         g->mt_comp0 = softc->comp_algorithm;
 919                         g->mt_comp1 = softc->comp_algorithm;
 920                         g->mt_comp2 = softc->comp_algorithm;
 921                         g->mt_comp3 = softc->comp_algorithm;
 922                 }
 923                 g->mt_density = softc->media_density;
 924                 g->mt_density0 = softc->media_density;
 925                 g->mt_density1 = softc->media_density;
 926                 g->mt_density2 = softc->media_density;
 927                 g->mt_density3 = softc->media_density;
 928                 g->mt_blksiz = softc->media_blksize;
 929                 g->mt_blksiz0 = softc->media_blksize;
 930                 g->mt_blksiz1 = softc->media_blksize;
 931                 g->mt_blksiz2 = softc->media_blksize;
 932                 g->mt_blksiz3 = softc->media_blksize;
 933                 g->mt_fileno = softc->fileno;
 934                 g->mt_blkno = softc->blkno;
 935                 g->mt_dsreg = (short) softc->dsreg;
 936                 /*
 937                  * Yes, we know that this is likely to overflow
 938                  */
 939                 if (softc->last_resid_was_io) {
 940                         if ((g->mt_resid = (short) softc->last_io_resid) != 0) {
 941                                 if (SA_IS_CTRL(dev) == 0 || didlockperiph) {
 942                                         softc->last_io_resid = 0;
 943                                 }
 944                         }
 945                 } else {
 946                         if ((g->mt_resid = (short)softc->last_ctl_resid) != 0) {
 947                                 if (SA_IS_CTRL(dev) == 0 || didlockperiph) {
 948                                         softc->last_ctl_resid = 0;
 949                                 }
 950                         }
 951                 }
 952                 error = 0;
 953                 break;
 954         }
 955         case MTIOCERRSTAT:
 956         {
 957                 struct scsi_tape_errors *sep =
 958                     &((union mterrstat *)arg)->scsi_errstat;
 959
 960                 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
 961                     ("saioctl: MTIOCERRSTAT\n"));
 962
 963                 bzero(sep, sizeof(*sep));
 964                 sep->io_resid = softc->last_io_resid;
 965                 bcopy((caddr_t) &softc->last_io_sense, sep->io_sense,
 966                     sizeof (sep->io_sense));
 967                 bcopy((caddr_t) &softc->last_io_cdb, sep->io_cdb,
 968                     sizeof (sep->io_cdb));
 969                 sep->ctl_resid = softc->last_ctl_resid;
 970                 bcopy((caddr_t) &softc->last_ctl_sense, sep->ctl_sense,
 971                     sizeof (sep->ctl_sense));
 972                 bcopy((caddr_t) &softc->last_ctl_cdb, sep->ctl_cdb,
 973                     sizeof (sep->ctl_cdb));
 974
 975                 if (SA_IS_CTRL(dev) == 0 || didlockperiph)
 976                         bzero((caddr_t) &softc->errinfo,
 977                             sizeof (softc->errinfo));
 978                 error = 0;
 979                 break;
 980         }
 981         case MTIOCTOP:
 982         {
 983                 struct mtop *mt;
 984                 int    count;
 985
 986                 mt = (struct mtop *)arg;
 987
 988                 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
 989                          ("saioctl: op=0x%x count=0x%x\n",
 990                           mt->mt_op, mt->mt_count));
 991
 992                 count = mt->mt_count;
 993                 switch (mt->mt_op) {
 994                 case MTWEOF:    /* write an end-of-file marker */
 995                         /*
 996                          * We don't need to clear the SA_FLAG_TAPE_WRITTEN
 997                          * flag because by keeping track of filemarks
 998                          * we have last written we know ehether or not
 999                          * we need to write more when we close the device.
1000                          */
1001                         error = sawritefilemarks(periph, count, FALSE);
1002                         break;
1003                 case MTWSS:     /* write a setmark */
1004                         error = sawritefilemarks(periph, count, TRUE);
1005                         break;
1006                 case MTBSR:     /* backward space record */
1007                 case MTFSR:     /* forward space record */
1008                 case MTBSF:     /* backward space file */
1009                 case MTFSF:     /* forward space file */
1010                 case MTBSS:     /* backward space setmark */
1011                 case MTFSS:     /* forward space setmark */
1012                 case MTEOD:     /* space to end of recorded medium */
1013                 {
1014                         int nmarks;
1015
1016                         spaceop = SS_FILEMARKS;
1017                         nmarks = softc->filemarks;
1018                         error = sacheckeod(periph);
1019                         if (error) {
1020                                 xpt_print_path(periph->path);
1021                                 printf("EOD check prior to spacing failed\n");
1022                                 softc->flags |= SA_FLAG_EIO_PENDING;
1023                                 break;
1024                         }
1025                         nmarks -= softc->filemarks;
1026                         switch(mt->mt_op) {
1027                         case MTBSR:
1028                                 count = -count;
1029                                 /* FALLTHROUGH */
1030                         case MTFSR:
1031                                 spaceop = SS_BLOCKS;
1032                                 break;
1033                         case MTBSF:
1034                                 count = -count;
1035                                 /* FALLTHROUGH */
1036                         case MTFSF:
1037                                 break;
1038                         case MTBSS:
1039                                 count = -count;
1040                                 /* FALLTHROUGH */
1041                         case MTFSS:
1042                                 spaceop = SS_SETMARKS;
1043                                 break;
1044                         case MTEOD:
1045                                 spaceop = SS_EOD;
1046                                 count = 0;
1047                                 nmarks = 0;
1048                                 break;
1049                         default:
1050                                 error = EINVAL;
1051                                 break;
1052                         }
1053                         if (error)
1054                                 break;
1055
1056                         nmarks = softc->filemarks;
1057                         /*
1058                          * XXX: Why are we checking again?
1059                          */
1060                         error = sacheckeod(periph);
1061                         if (error)
1062                                 break;
1063                         nmarks -= softc->filemarks;
1064                         error = saspace(periph, count - nmarks, spaceop);
1065                         /*
1066                          * At this point, clear that we've written the tape
1067                          * and that we've written any filemarks. We really
1068                          * don't know what the applications wishes to do next-
1069                          * the sacheckeod's will make sure we terminated the
1070                          * tape correctly if we'd been writing, but the next
1071                          * action the user application takes will set again
1072                          * whether we need to write filemarks.
1073                          */
1074                         softc->flags &=
1075                             ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
1076                         softc->filemarks = 0;
1077                         break;
1078                 }
1079                 case MTREW:     /* rewind */
1080                         (void) sacheckeod(periph);
1081                         error = sarewind(periph);
1082                         /* see above */
1083                         softc->flags &=
1084                             ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
1085                         softc->flags &= ~SA_FLAG_ERR_PENDING;
1086                         softc->filemarks = 0;
1087                         break;
1088                 case MTERASE:   /* erase */
1089                         error = saerase(periph, count);
1090                         softc->flags &=
1091                             ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
1092                         softc->flags &= ~SA_FLAG_ERR_PENDING;
1093                         break;
1094                 case MTRETENS:  /* re-tension tape */
1095                         error = saretension(periph);
1096                         softc->flags &=
1097                             ~(SA_FLAG_TAPE_WRITTEN|SA_FLAG_TAPE_FROZEN);
1098                         softc->flags &= ~SA_FLAG_ERR_PENDING;
1099                         break;
1100                 case MTOFFL:    /* rewind and put the drive offline */
1101
1102                         (void) sacheckeod(periph);
1103                         /* see above */
1104                         softc->flags &= ~SA_FLAG_TAPE_WRITTEN;
1105                         softc->filemarks = 0;
1106
1107                         error = sarewind(periph);
1108                         /* clear the frozen flag anyway */
1109                         softc->flags &= ~SA_FLAG_TAPE_FROZEN;
1110
1111                         /*
1112                          * Be sure to allow media removal before ejecting.
1113                          */
1114
1115                         saprevent(periph, PR_ALLOW);
1116                         if (error == 0) {
1117                                 error = saloadunload(periph, FALSE);
1118                                 if (error == 0) {
1119                                         softc->flags &= ~SA_FLAG_TAPE_MOUNTED;
1120                                 }
1121                         }
1122                         break;
1123
1124                 case MTNOP:     /* no operation, sets status only */
1125                 case MTCACHE:   /* enable controller cache */
1126                 case MTNOCACHE: /* disable controller cache */
1127                         error = 0;
1128                         break;
1129
1130                 case MTSETBSIZ: /* Set block size for device */
1131
1132                         error = sasetparams(periph, SA_PARAM_BLOCKSIZE, count,
1133                                             0, 0, 0);
1134                         if (error == 0) {
1135                                 softc->last_media_blksize =
1136                                     softc->media_blksize;
1137                                 softc->media_blksize = count;
1138                                 if (count) {
1139                                         softc->flags |= SA_FLAG_FIXED;
1140                                         if (powerof2(count)) {
1141                                                 softc->blk_shift =
1142                                                     ffs(count) - 1;
1143                                                 softc->blk_mask = count - 1;
1144                                         } else {
1145                                                 softc->blk_mask = ~0;
1146                                                 softc->blk_shift = 0;
1147                                         }
1148                                         /*
1149                                          * Make the user's desire 'persistent'.
1150                                          */
1151                                         softc->quirks &= ~SA_QUIRK_VARIABLE;
1152                                         softc->quirks |= SA_QUIRK_FIXED;
1153                                 } else {
1154                                         softc->flags &= ~SA_FLAG_FIXED;
1155                                         if (softc->max_blk == 0) {
1156                                                 softc->max_blk = ~0;
1157                                         }
1158                                         softc->blk_shift = 0;
1159                                         if (softc->blk_gran != 0) {
1160                                                 softc->blk_mask =
1161                                                     softc->blk_gran - 1;
1162                                         } else {
1163                                                 softc->blk_mask = 0;
1164                                         }
1165                                         /*
1166                                          * Make the user's desire 'persistent'.
1167                                          */
1168                                         softc->quirks |= SA_QUIRK_VARIABLE;
1169                                         softc->quirks &= ~SA_QUIRK_FIXED;
1170                                 }
1171                         }
1172                         break;
1173                 case MTSETDNSTY:        /* Set density for device and mode */
1174                         if (count > UCHAR_MAX) {
1175                                 error = EINVAL;
1176                                 break;
1177                         } else {
1178                                 error = sasetparams(periph, SA_PARAM_DENSITY,
1179                                                     0, count, 0, 0);
1180                         }
1181                         break;
1182                 case MTCOMP:    /* enable compression */
1183                         /*
1184                          * Some devices don't support compression, and
1185                          * don't like it if you ask them for the
1186                          * compression page.
1187                          */
1188                         if ((softc->quirks & SA_QUIRK_NOCOMP) ||
1189                             (softc->flags & SA_FLAG_COMP_UNSUPP)) {
1190                                 error = ENODEV;
1191                                 break;
1192                         }
1193                         error = sasetparams(periph, SA_PARAM_COMPRESSION,
1194                             0, 0, count, SF_NO_PRINT);
1195                         break;
1196                 default:
1197                         error = EINVAL;
1198                 }
1199                 break;
1200         }
1201         case MTIOCIEOT:
1202         case MTIOCEEOT:
1203                 error = 0;
1204                 break;
1205         case MTIOCRDSPOS:
1206                 error = sardpos(periph, 0, (u_int32_t *) arg);
1207                 break;
1208         case MTIOCRDHPOS:
1209                 error = sardpos(periph, 1, (u_int32_t *) arg);
1210                 break;
1211         case MTIOCSLOCATE:
1212                 error = sasetpos(periph, 0, (u_int32_t *) arg);
1213                 break;
1214         case MTIOCHLOCATE:
1215                 error = sasetpos(periph, 1, (u_int32_t *) arg);
1216                 break;
1217         case MTIOCGETEOTMODEL:
1218                 error = 0;
1219                 if (softc->quirks & SA_QUIRK_1FM)
1220                         mode = 1;
1221                 else
1222                         mode = 2;
1223                 *((u_int32_t *) arg) = mode;
1224                 break;
1225         case MTIOCSETEOTMODEL:
1226                 error = 0;
1227                 switch (*((u_int32_t *) arg)) {
1228                 case 1:
1229                         softc->quirks &= ~SA_QUIRK_2FM;
1230                         softc->quirks |= SA_QUIRK_1FM;
1231                         break;
1232                 case 2:
1233                         softc->quirks &= ~SA_QUIRK_1FM;
1234                         softc->quirks |= SA_QUIRK_2FM;
1235                         break;
1236                 default:
1237                         error = EINVAL;
1238                         break;
1239                 }
1240                 break;
1241         default:
1242                 error = cam_periph_ioctl(periph, cmd, arg, saerror);
1243                 break;
1244         }
1245
1246         /*
1247          * Check to see if we cleared a frozen state
1248          */
1249         if (error == 0 && (softc->flags & SA_FLAG_TAPE_FROZEN)) {
1250                 switch(cmd) {
1251                 case MTIOCRDSPOS:
1252                 case MTIOCRDHPOS:
1253                 case MTIOCSLOCATE:
1254                 case MTIOCHLOCATE:
1255                         softc->fileno = (daddr_t) -1;
1256                         softc->blkno = (daddr_t) -1;
1257                         softc->flags &= ~SA_FLAG_TAPE_FROZEN;
1258                         xpt_print_path(periph->path);
1259                         printf("tape state now unfrozen.\n");
1260                         break;
1261                 default:
1262                         break;
1263                 }
1264         }
1265         if (didlockperiph) {
1266                 cam_periph_unlock(periph);
1267         }
1268         return (error);
1269 }
1270
1271 static void
1272 sainit(void)
1273 {
1274         cam_status status;
1275         struct cam_path *path;
1276
1277         /*
1278          * Create our extend array for storing the devices we attach to.
1279          */
1280         saperiphs = cam_extend_new();
1281         if (saperiphs == NULL) {
1282                 printf("sa: Failed to alloc extend array!\n");
1283                 return;
1284         }
1285
1286         /*
1287          * Install a global async callback.
1288          */
1289         status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID,
1290                                  CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
1291
1292         if (status == CAM_REQ_CMP) {
1293                 /* Register the async callbacks of interrest */
1294                 struct ccb_setasync csa; /*
1295                                           * This is an immediate CCB,
1296                                           * so using the stack is OK
1297                                           */
1298                 xpt_setup_ccb(&csa.ccb_h, path, 5);
1299                 csa.ccb_h.func_code = XPT_SASYNC_CB;
1300                 csa.event_enable = AC_FOUND_DEVICE;
1301                 csa.callback = saasync;
1302                 csa.callback_arg = NULL;
1303                 xpt_action((union ccb *)&csa);
1304                 status = csa.ccb_h.status;
1305                 xpt_free_path(path);
1306         }
1307
1308         if (status != CAM_REQ_CMP) {
1309                 printf("sa: Failed to attach master async callback "
1310                        "due to status 0x%x!\n", status);
1311         }
1312 }
1313
1314 static void
1315 saoninvalidate(struct cam_periph *periph)
1316 {
1317         struct sa_softc *softc;
1318         struct buf *q_bp;
1319         struct ccb_setasync csa;
1320         int s;
1321
1322         softc = (struct sa_softc *)periph->softc;
1323
1324         /*
1325          * De-register any async callbacks.
1326          */
1327         xpt_setup_ccb(&csa.ccb_h, periph->path,
1328                       /* priority */ 5);
1329         csa.ccb_h.func_code = XPT_SASYNC_CB;
1330         csa.event_enable = 0;
1331         csa.callback = saasync;
1332         csa.callback_arg = periph;
1333         xpt_action((union ccb *)&csa);
1334
1335         softc->flags |= SA_FLAG_INVALID;
1336
1337         /*
1338          * Although the oninvalidate() routines are always called at
1339          * splsoftcam, we need to be at splbio() here to keep the buffer
1340          * queue from being modified while we traverse it.
1341          */
1342         s = splbio();
1343
1344         /*
1345          * Return all queued I/O with ENXIO.
1346          * XXX Handle any transactions queued to the card
1347          *     with XPT_ABORT_CCB.
1348          */
1349         while ((q_bp = bufq_first(&softc->buf_queue)) != NULL){
1350                 bufq_remove(&softc->buf_queue, q_bp);
1351                 q_bp->b_resid = q_bp->b_bcount;
1352                 q_bp->b_error = ENXIO;
1353                 q_bp->b_flags |= B_ERROR;
1354                 biodone(q_bp);
1355         }
1356         softc->queue_count = 0;
1357         splx(s);
1358
1359         xpt_print_path(periph->path);
1360         printf("lost device\n");
1361
1362 }
1363
1364 static void
1365 sacleanup(struct cam_periph *periph)
1366 {
1367         struct sa_softc *softc;
1368         int i;
1369
1370         softc = (struct sa_softc *)periph->softc;
1371
1372         devstat_remove_entry(&softc->device_stats);
1373
1374         destroy_dev(softc->devs.ctl_dev);
1375         destroy_dev(softc->devs.r_dev);
1376         destroy_dev(softc->devs.nr_dev);
1377         destroy_dev(softc->devs.er_dev);
1378
1379         for (i = 0; i < SA_NUM_MODES; i++) {
1380                 destroy_dev(softc->devs.mode_devs[i].r_dev);
1381                 destroy_dev(softc->devs.mode_devs[i].nr_dev);
1382                 destroy_dev(softc->devs.mode_devs[i].er_dev);
1383         }
1384
1385         cam_extend_release(saperiphs, periph->unit_number);
1386         xpt_print_path(periph->path);
1387         printf("removing device entry\n");
1388         free(softc, M_DEVBUF);
1389 }
1390
1391 static void
1392 saasync(void *callback_arg, u_int32_t code,
1393         struct cam_path *path, void *arg)
1394 {
1395         struct cam_periph *periph;
1396
1397         periph = (struct cam_periph *)callback_arg;
1398         switch (code) {
1399         case AC_FOUND_DEVICE:
1400         {
1401                 struct ccb_getdev *cgd;
1402                 cam_status status;
1403
1404                 cgd = (struct ccb_getdev *)arg;
1405                 if (cgd == NULL)
1406                         break;
1407
1408                 if (SID_TYPE(&cgd->inq_data) != T_SEQUENTIAL)
1409                         break;
1410
1411                 /*
1412                  * Allocate a peripheral instance for
1413                  * this device and start the probe
1414                  * process.
1415                  */
1416                 status = cam_periph_alloc(saregister, saoninvalidate,
1417                                           sacleanup, sastart,
1418                                           "sa", CAM_PERIPH_BIO, cgd->ccb_h.path,
1419                                           saasync, AC_FOUND_DEVICE, cgd);
1420
1421                 if (status != CAM_REQ_CMP
1422                  && status != CAM_REQ_INPROG)
1423                         printf("saasync: Unable to probe new device "
1424                                 "due to status 0x%x\n", status);
1425                 break;
1426         }
1427         default:
1428                 cam_periph_async(periph, code, path, arg);
1429                 break;
1430         }
1431 }
1432
1433 static cam_status
1434 saregister(struct cam_periph *periph, void *arg)
1435 {
1436         struct sa_softc *softc;
1437         struct ccb_setasync csa;
1438         struct ccb_getdev *cgd;
1439         caddr_t match;
1440         int i;
1441
1442         cgd = (struct ccb_getdev *)arg;
1443         if (periph == NULL) {
1444                 printf("saregister: periph was NULL!!\n");
1445                 return (CAM_REQ_CMP_ERR);
1446         }
1447
1448         if (cgd == NULL) {
1449                 printf("saregister: no getdev CCB, can't register device\n");
1450                 return (CAM_REQ_CMP_ERR);
1451         }
1452
1453         softc = malloc(sizeof (*softc), M_DEVBUF, M_INTWAIT | M_ZERO);
1454         softc->scsi_rev = SID_ANSI_REV(&cgd->inq_data);
1455         softc->state = SA_STATE_NORMAL;
1456         softc->fileno = (daddr_t) -1;
1457         softc->blkno = (daddr_t) -1;
1458
1459         bufq_init(&softc->buf_queue);
1460         periph->softc = softc;
1461         cam_extend_set(saperiphs, periph->unit_number, periph);
1462
1463         /*
1464          * See if this device has any quirks.
1465          */
1466         match = cam_quirkmatch((caddr_t)&cgd->inq_data,
1467                                (caddr_t)sa_quirk_table,
1468                                sizeof(sa_quirk_table)/sizeof(*sa_quirk_table),
1469                                sizeof(*sa_quirk_table), scsi_inquiry_match);
1470
1471         if (match != NULL) {
1472                 softc->quirks = ((struct sa_quirk_entry *)match)->quirks;
1473                 softc->last_media_blksize =
1474                     ((struct sa_quirk_entry *)match)->prefblk;
1475 #ifdef  CAMDEBUG
1476                 xpt_print_path(periph->path);
1477                 printf("found quirk entry %d\n", (int)
1478                     (((struct sa_quirk_entry *) match) - sa_quirk_table));
1479 #endif
1480         } else
1481                 softc->quirks = SA_QUIRK_NONE;
1482
1483         /*
1484          * The SA driver supports a blocksize, but we don't know the
1485          * blocksize until we media is inserted.  So, set a flag to
1486          * indicate that the blocksize is unavailable right now.
1487          */
1488         devstat_add_entry(&softc->device_stats, "sa", periph->unit_number, 0,
1489             DEVSTAT_BS_UNAVAILABLE, SID_TYPE(&cgd->inq_data) |
1490             DEVSTAT_TYPE_IF_SCSI, DEVSTAT_PRIORITY_TAPE);
1491
1492         softc->devs.ctl_dev = make_dev(&sa_cdevsw, SAMINOR(SA_CTLDEV,
1493             periph->unit_number, 0, SA_ATYPE_R), UID_ROOT, GID_OPERATOR,
1494             0660, "r%s%d.ctl", periph->periph_name, periph->unit_number);
1495
1496         softc->devs.r_dev = make_dev(&sa_cdevsw, SAMINOR(SA_NOT_CTLDEV,
1497             periph->unit_number, 0, SA_ATYPE_R), UID_ROOT, GID_OPERATOR,
1498             0660, "r%s%d", periph->periph_name, periph->unit_number);
1499
1500         softc->devs.nr_dev = make_dev(&sa_cdevsw, SAMINOR(SA_NOT_CTLDEV,
1501             periph->unit_number, 0, SA_ATYPE_NR), UID_ROOT, GID_OPERATOR,
1502             0660, "nr%s%d", periph->periph_name, periph->unit_number);
1503
1504         softc->devs.er_dev = make_dev(&sa_cdevsw, SAMINOR(SA_NOT_CTLDEV,
1505             periph->unit_number, 0, SA_ATYPE_ER), UID_ROOT, GID_OPERATOR,
1506             0660, "er%s%d", periph->periph_name, periph->unit_number);
1507
1508         for (i = 0; i < SA_NUM_MODES; i++) {
1509
1510                 softc->devs.mode_devs[i].r_dev = make_dev(&sa_cdevsw,
1511                     SAMINOR(SA_NOT_CTLDEV, periph->unit_number, i, SA_ATYPE_R),
1512                     UID_ROOT, GID_OPERATOR, 0660, "r%s%d.%d",
1513                     periph->periph_name, periph->unit_number, i);
1514
1515                 softc->devs.mode_devs[i].nr_dev = make_dev(&sa_cdevsw,
1516                     SAMINOR(SA_NOT_CTLDEV, periph->unit_number, i, SA_ATYPE_NR),
1517                     UID_ROOT, GID_OPERATOR, 0660, "nr%s%d.%d",
1518                     periph->periph_name, periph->unit_number, i);
1519
1520
1521                 softc->devs.mode_devs[i].er_dev = make_dev(&sa_cdevsw,
1522                     SAMINOR(SA_NOT_CTLDEV, periph->unit_number, i, SA_ATYPE_ER),
1523                     UID_ROOT, GID_OPERATOR, 0660, "er%s%d.%d",
1524                     periph->periph_name, periph->unit_number, i);
1525         }
1526
1527         /*
1528          * Add an async callback so that we get
1529          * notified if this device goes away.
1530          */
1531         xpt_setup_ccb(&csa.ccb_h, periph->path, /* priority */ 5);
1532         csa.ccb_h.func_code = XPT_SASYNC_CB;
1533         csa.event_enable = AC_LOST_DEVICE;
1534         csa.callback = saasync;
1535         csa.callback_arg = periph;
1536         xpt_action((union ccb *)&csa);
1537
1538         xpt_announce_periph(periph, NULL);
1539
1540         return (CAM_REQ_CMP);
1541 }
1542
1543 static void
1544 sastart(struct cam_periph *periph, union ccb *start_ccb)
1545 {
1546         struct sa_softc *softc;
1547
1548         softc = (struct sa_softc *)periph->softc;
1549
1550         CAM_DEBUG(periph->path, CAM_DEBUG_INFO, ("sastart"));
1551
1552
1553         switch (softc->state) {
1554         case SA_STATE_NORMAL:
1555         {
1556                 /* Pull a buffer from the queue and get going on it */
1557                 struct buf *bp;
1558                 int s;
1559
1560                 /*
1561                  * See if there is a buf with work for us to do..
1562                  */
1563                 s = splbio();
1564                 bp = bufq_first(&softc->buf_queue);
1565                 if (periph->immediate_priority <= periph->pinfo.priority) {
1566                         CAM_DEBUG_PRINT(CAM_DEBUG_SUBTRACE,
1567                                         ("queuing for immediate ccb\n"));
1568                         Set_CCB_Type(start_ccb, SA_CCB_WAITING);
1569                         SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
1570                                           periph_links.sle);
1571                         periph->immediate_priority = CAM_PRIORITY_NONE;
1572                         splx(s);
1573                         wakeup(&periph->ccb_list);
1574                 } else if (bp == NULL) {
1575                         splx(s);
1576                         xpt_release_ccb(start_ccb);
1577                 } else if ((softc->flags & SA_FLAG_ERR_PENDING) != 0) {
1578                         struct buf *done_bp;
1579 again:
1580                         softc->queue_count--;
1581                         bufq_remove(&softc->buf_queue, bp);
1582                         bp->b_resid = bp->b_bcount;
1583                         done_bp = bp;
1584                         if ((softc->flags & SA_FLAG_EOM_PENDING) != 0) {
1585                                 /*
1586                                  * We now just clear errors in this case
1587                                  * and let the residual be the notifier.
1588                                  */
1589                                 bp->b_error = 0;
1590                         } else if ((softc->flags & SA_FLAG_EOF_PENDING) != 0) {
1591                                 /*
1592                                  * This can only happen if we're reading
1593                                  * in fixed length mode. In this case,
1594                                  * we dump the rest of the list the
1595                                  * same way.
1596                                  */
1597                                 bp->b_error = 0;
1598                                 if (bufq_first(&softc->buf_queue) != NULL) {
1599                                         biodone(done_bp);
1600                                         goto again;
1601                                 }
1602                         } else if ((softc->flags & SA_FLAG_EIO_PENDING) != 0) {
1603                                 bp->b_error = EIO;
1604                                 bp->b_flags |= B_ERROR;
1605                         }
1606                         bp = bufq_first(&softc->buf_queue);
1607                         /*
1608                          * Only if we have no other buffers queued up
1609                          * do we clear the pending error flag.
1610                          */
1611                         if (bp == NULL)
1612                                 softc->flags &= ~SA_FLAG_ERR_PENDING;
1613                         CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
1614                             ("sastart- ERR_PENDING now 0x%x, bp is %sNULL, "
1615                             "%d more buffers queued up\n",
1616                             (softc->flags & SA_FLAG_ERR_PENDING),
1617                             (bp != NULL)? "not " : " ", softc->queue_count));
1618                         splx(s);
1619                         xpt_release_ccb(start_ccb);
1620                         biodone(done_bp);
1621                 } else {
1622                         u_int32_t length;
1623
1624                         bufq_remove(&softc->buf_queue, bp);
1625                         softc->queue_count--;
1626
1627                         if ((softc->flags & SA_FLAG_FIXED) != 0) {
1628                                 if (softc->blk_shift != 0) {
1629                                         length =
1630                                             bp->b_bcount >> softc->blk_shift;
1631                                 } else if (softc->media_blksize != 0) {
1632                                         length =
1633                                             bp->b_bcount / softc->media_blksize;
1634                                 } else {
1635                                         bp->b_error = EIO;
1636                                         xpt_print_path(periph->path);
1637                                         printf("zero blocksize for "
1638                                             "FIXED length writes?\n");
1639                                         splx(s);
1640                                         biodone(bp);
1641                                         break;
1642                                 }
1643                                 CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
1644                                     ("Fixed Record Count is %d\n", length));
1645                         } else {
1646                                 length = bp->b_bcount;
1647                                 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_INFO,
1648                                     ("Variable Record Count is %d\n", length));
1649                         }
1650                         devstat_start_transaction(&softc->device_stats);
1651                         /*
1652                          * Some people have theorized that we should
1653                          * suppress illegal length indication if we are
1654                          * running in variable block mode so that we don't
1655                          * have to request sense every time our requested
1656                          * block size is larger than the written block.
1657                          * The residual information from the ccb allows
1658                          * us to identify this situation anyway.  The only
1659                          * problem with this is that we will not get
1660                          * information about blocks that are larger than
1661                          * our read buffer unless we set the block size
1662                          * in the mode page to something other than 0.
1663                          *
1664                          * I believe that this is a non-issue. If user apps
1665                          * don't adjust their read size to match our record
1666                          * size, that's just life. Anyway, the typical usage
1667                          * would be to issue, e.g., 64KB reads and occasionally
1668                          * have to do deal with 512 byte or 1KB intermediate
1669                          * records.
1670                          */
1671                         softc->dsreg = (bp->b_flags & B_READ)?
1672                             MTIO_DSREG_RD : MTIO_DSREG_WR;
1673                         scsi_sa_read_write(&start_ccb->csio, 0, sadone,
1674                             MSG_SIMPLE_Q_TAG, (bp->b_flags & B_READ) != 0,
1675                             FALSE, (softc->flags & SA_FLAG_FIXED) != 0,
1676                             length, bp->b_data, bp->b_bcount, SSD_FULL_SIZE,
1677                             IO_TIMEOUT);
1678                         start_ccb->ccb_h.ccb_pflags &= ~SA_POSITION_UPDATED;
1679                         Set_CCB_Type(start_ccb, SA_CCB_BUFFER_IO);
1680                         start_ccb->ccb_h.ccb_bp = bp;
1681                         bp = bufq_first(&softc->buf_queue);
1682                         splx(s);
1683                         xpt_action(start_ccb);
1684                 }
1685
1686                 if (bp != NULL) {
1687                         /* Have more work to do, so ensure we stay scheduled */
1688                         xpt_schedule(periph, 1);
1689                 }
1690                 break;
1691         }
1692         case SA_STATE_ABNORMAL:
1693         default:
1694                 panic("state 0x%x in sastart", softc->state);
1695                 break;
1696         }
1697 }
1698
1699
1700 static void
1701 sadone(struct cam_periph *periph, union ccb *done_ccb)
1702 {
1703         struct sa_softc *softc;
1704         struct ccb_scsiio *csio;
1705
1706         softc = (struct sa_softc *)periph->softc;
1707         csio = &done_ccb->csio;
1708         switch (CCB_Type(csio)) {
1709         case SA_CCB_BUFFER_IO:
1710         {
1711                 struct buf *bp;
1712                 int error;
1713
1714                 softc->dsreg = MTIO_DSREG_REST;
1715                 bp = (struct buf *)done_ccb->ccb_h.ccb_bp;
1716                 error = 0;
1717                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
1718                         if ((error = saerror(done_ccb, 0, 0)) == ERESTART) {
1719                                 /*
1720                                  * A retry was scheduled, so just return.
1721                                  */
1722                                 return;
1723                         }
1724                 }
1725
1726                 if (error == EIO) {
1727                         int s;
1728                         struct buf *q_bp;
1729
1730                         /*
1731                          * Catastrophic error. Mark the tape as frozen
1732                          * (we no longer know tape position).
1733                          *
1734                          * Return all queued I/O with EIO, and unfreeze
1735                          * our queue so that future transactions that
1736                          * attempt to fix this problem can get to the
1737                          * device.
1738                          *
1739                          */
1740
1741                         s = splbio();
1742                         softc->flags |= SA_FLAG_TAPE_FROZEN;
1743                         while ((q_bp = bufq_first(&softc->buf_queue)) != NULL) {
1744                                 bufq_remove(&softc->buf_queue, q_bp);
1745                                 q_bp->b_resid = q_bp->b_bcount;
1746                                 q_bp->b_error = EIO;
1747                                 q_bp->b_flags |= B_ERROR;
1748                                 biodone(q_bp);
1749                         }
1750                         splx(s);
1751                 }
1752                 if (error != 0) {
1753                         bp->b_resid = bp->b_bcount;
1754                         bp->b_error = error;
1755                         bp->b_flags |= B_ERROR;
1756                         /*
1757                          * In the error case, position is updated in saerror.
1758                          */
1759                 } else {
1760                         bp->b_resid = csio->resid;
1761                         bp->b_error = 0;
1762                         if (csio->resid != 0) {
1763                                 bp->b_flags |= B_ERROR;
1764                         }
1765                         if ((bp->b_flags & B_READ) == 0) {
1766                                 softc->flags |= SA_FLAG_TAPE_WRITTEN;
1767                                 softc->filemarks = 0;
1768                         }
1769                         if (!(csio->ccb_h.ccb_pflags & SA_POSITION_UPDATED) &&
1770                             (softc->blkno != (daddr_t) -1)) {
1771                                 if ((softc->flags & SA_FLAG_FIXED) != 0) {
1772                                         u_int32_t l;
1773                                         if (softc->blk_shift != 0) {
1774                                                 l = bp->b_bcount >>
1775                                                         softc->blk_shift;
1776                                         } else {
1777                                                 l = bp->b_bcount /
1778                                                         softc->media_blksize;
1779                                         }
1780                                         softc->blkno += (daddr_t) l;
1781                                 } else {
1782                                         softc->blkno++;
1783                                 }
1784                         }
1785                 }
1786                 /*
1787                  * If we had an error (immediate or pending),
1788                  * release the device queue now.
1789                  */
1790                 if (error || (softc->flags & SA_FLAG_ERR_PENDING))
1791                         cam_release_devq(done_ccb->ccb_h.path, 0, 0, 0, 0);
1792 #ifdef  CAMDEBUG
1793                 if (error || bp->b_resid) {
1794                         CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
1795                                   ("error %d resid %ld count %ld\n", error,
1796                                   bp->b_resid, bp->b_bcount));
1797                 }
1798 #endif
1799                 devstat_end_transaction_buf(&softc->device_stats, bp);
1800                 biodone(bp);
1801                 break;
1802         }
1803         case SA_CCB_WAITING:
1804         {
1805                 /* Caller will release the CCB */
1806                 wakeup(&done_ccb->ccb_h.cbfcnp);
1807                 return;
1808         }
1809         }
1810         xpt_release_ccb(done_ccb);
1811 }
1812
1813 /*
1814  * Mount the tape (make sure it's ready for I/O).
1815  */
1816 static int
1817 samount(struct cam_periph *periph, int oflags, dev_t dev)
1818 {
1819         struct  sa_softc *softc;
1820         union   ccb *ccb;
1821         int     error;
1822
1823         /*
1824          * oflags can be checked for 'kind' of open (read-only check) - later
1825          * dev can be checked for a control-mode or compression open - later
1826          */
1827         UNUSED_PARAMETER(oflags);
1828         UNUSED_PARAMETER(dev);
1829
1830
1831         softc = (struct sa_softc *)periph->softc;
1832
1833         /*
1834          * This should determine if something has happend since the last
1835          * open/mount that would invalidate the mount. We do *not* want
1836          * to retry this command- we just want the status. But we only
1837          * do this if we're mounted already- if we're not mounted,
1838          * we don't care about the unit read state and can instead use
1839          * this opportunity to attempt to reserve the tape unit.
1840          */
1841
1842         if (softc->flags & SA_FLAG_TAPE_MOUNTED) {
1843                 ccb = cam_periph_getccb(periph, 1);
1844                 scsi_test_unit_ready(&ccb->csio, 0, sadone,
1845                     MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT);
1846                 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1847                     &softc->device_stats);
1848                 QFRLS(ccb);
1849                 if (error == ENXIO) {
1850                         softc->flags &= ~SA_FLAG_TAPE_MOUNTED;
1851                         scsi_test_unit_ready(&ccb->csio, 0, sadone,
1852                             MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT);
1853                         error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1854                             &softc->device_stats);
1855                         QFRLS(ccb);
1856                 } else if (error) {
1857                         /*
1858                          * We don't need to freeze the tape because we
1859                          * will now attempt to rewind/load it.
1860                          */
1861                         softc->flags &= ~SA_FLAG_TAPE_MOUNTED;
1862                         if (CAM_DEBUGGED(ccb->ccb_h.path, CAM_DEBUG_INFO)) {
1863                                 xpt_print_path(ccb->ccb_h.path);
1864                                 printf("error %d on TUR in samount\n", error);
1865                         }
1866                 }
1867         } else {
1868                 error = sareservereleaseunit(periph, TRUE);
1869                 if (error) {
1870                         return (error);
1871                 }
1872                 ccb = cam_periph_getccb(periph, 1);
1873                 scsi_test_unit_ready(&ccb->csio, 0, sadone,
1874                     MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, IO_TIMEOUT);
1875                 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1876                     &softc->device_stats);
1877                 QFRLS(ccb);
1878         }
1879
1880         if ((softc->flags & SA_FLAG_TAPE_MOUNTED) == 0) {
1881                 struct scsi_read_block_limits_data *rblim = NULL;
1882                 int comp_enabled, comp_supported;
1883                 u_int8_t write_protect, guessing = 0;
1884
1885                 /*
1886                  * Clear out old state.
1887                  */
1888                 softc->flags &= ~(SA_FLAG_TAPE_WP|SA_FLAG_TAPE_WRITTEN|
1889                                   SA_FLAG_ERR_PENDING|SA_FLAG_COMP_ENABLED|
1890                                   SA_FLAG_COMP_SUPP|SA_FLAG_COMP_UNSUPP);
1891                 softc->filemarks = 0;
1892
1893                 /*
1894                  * *Very* first off, make sure we're loaded to BOT.
1895                  */
1896                 scsi_load_unload(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, FALSE,
1897                     FALSE, FALSE, 1, SSD_FULL_SIZE, REWIND_TIMEOUT);
1898                 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1899                     &softc->device_stats);
1900                 QFRLS(ccb);
1901
1902                 /*
1903                  * In case this doesn't work, do a REWIND instead
1904                  */
1905                 if (error) {
1906                         scsi_rewind(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG,
1907                             FALSE, SSD_FULL_SIZE, REWIND_TIMEOUT);
1908                         error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1909                                 &softc->device_stats);
1910                         QFRLS(ccb);
1911                 }
1912                 if (error) {
1913                         xpt_release_ccb(ccb);
1914                         goto exit;
1915                 }
1916
1917                 /*
1918                  * Do a dummy test read to force access to the
1919                  * media so that the drive will really know what's
1920                  * there. We actually don't really care what the
1921                  * blocksize on tape is and don't expect to really
1922                  * read a full record.
1923                  */
1924                 rblim = malloc(8192, M_TEMP, M_INTWAIT);
1925
1926                 if ((softc->quirks & SA_QUIRK_NODREAD) == 0) {
1927                         scsi_sa_read_write(&ccb->csio, 0, sadone,
1928                             MSG_SIMPLE_Q_TAG, 1, FALSE, 0, 8192,
1929                             (void *) rblim, 8192, SSD_FULL_SIZE,
1930                             IO_TIMEOUT);
1931                         (void) cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
1932                             &softc->device_stats);
1933                         QFRLS(ccb);
1934                         scsi_rewind(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG,
1935                             FALSE, SSD_FULL_SIZE, REWIND_TIMEOUT);
1936                         error = cam_periph_runccb(ccb, saerror, 0,
1937                             SF_NO_PRINT | SF_RETRY_SELTO | SF_RETRY_UA,
1938                             &softc->device_stats);
1939                         QFRLS(ccb);
1940                         if (error) {
1941                                 xpt_print_path(ccb->ccb_h.path);
1942                                 printf("unable to rewind after test read\n");
1943                                 xpt_release_ccb(ccb);
1944                                 goto exit;
1945                         }
1946                 }
1947
1948                 /*
1949                  * Next off, determine block limits.
1950                  */
1951                 scsi_read_block_limits(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG,
1952                     rblim, SSD_FULL_SIZE, SCSIOP_TIMEOUT);
1953
1954                 error = cam_periph_runccb(ccb, saerror, 0,
1955                     SF_NO_PRINT | SF_RETRY_UA | SF_RETRY_SELTO,
1956                     &softc->device_stats);
1957                 QFRLS(ccb);
1958                 xpt_release_ccb(ccb);
1959
1960                 if (error != 0) {
1961                         /*
1962                          * If it's less than SCSI-2, READ BLOCK LIMITS is not
1963                          * a MANDATORY command. Anyway- it doesn't matter-
1964                          * we can proceed anyway.
1965                          */
1966                         softc->blk_gran = 0;
1967                         softc->max_blk = ~0;
1968                         softc->min_blk = 0;
1969                 } else {
1970                         if (softc->scsi_rev >= SCSI_REV_3) {
1971                                 softc->blk_gran = RBL_GRAN(rblim);
1972                         } else {
1973                                 softc->blk_gran = 0;
1974                         }
1975                         /*
1976                          * We take max_blk == min_blk to mean a default to
1977                          * fixed mode- but note that whatever we get out of
1978                          * sagetparams below will actually determine whether
1979                          * we are actually *in* fixed mode.
1980                          */
1981                         softc->max_blk = scsi_3btoul(rblim->maximum);
1982                         softc->min_blk = scsi_2btoul(rblim->minimum);
1983
1984
1985                 }
1986                 /*
1987                  * Next, perform a mode sense to determine
1988                  * current density, blocksize, compression etc.
1989                  */
1990                 error = sagetparams(periph, SA_PARAM_ALL,
1991                                     &softc->media_blksize,
1992                                     &softc->media_density,
1993                                     &softc->media_numblks,
1994                                     &softc->buffer_mode, &write_protect,
1995                                     &softc->speed, &comp_supported,
1996                                     &comp_enabled, &softc->comp_algorithm,
1997                                     NULL);
1998
1999                 if (error != 0) {
2000                         /*
2001                          * We could work a little harder here. We could
2002                          * adjust our attempts to get information. It
2003                          * might be an ancient tape drive. If someone
2004                          * nudges us, we'll do that.
2005                          */
2006                         goto exit;
2007                 }
2008
2009                 /*
2010                  * If no quirk has determined that this is a device that is
2011                  * preferred to be in fixed or variable mode, now is the time
2012                  * to find out.
2013                  */
2014                 if ((softc->quirks & (SA_QUIRK_FIXED|SA_QUIRK_VARIABLE)) == 0) {
2015                         guessing = 1;
2016                         /*
2017                          * This could be expensive to find out. Luckily we
2018                          * only need to do this once. If we start out in
2019                          * 'default' mode, try and set ourselves to one
2020                          * of the densities that would determine a wad
2021                          * of other stuff. Go from highest to lowest.
2022                          */
2023                         if (softc->media_density == SCSI_DEFAULT_DENSITY) {
2024                                 int i;
2025                                 static u_int8_t ctry[] = {
2026                                         SCSI_DENSITY_HALFINCH_PE,
2027                                         SCSI_DENSITY_HALFINCH_6250C,
2028                                         SCSI_DENSITY_HALFINCH_6250,
2029                                         SCSI_DENSITY_HALFINCH_1600,
2030                                         SCSI_DENSITY_HALFINCH_800,
2031                                         SCSI_DENSITY_QIC_4GB,
2032                                         SCSI_DENSITY_QIC_2GB,
2033                                         SCSI_DENSITY_QIC_525_320,
2034                                         SCSI_DENSITY_QIC_150,
2035                                         SCSI_DENSITY_QIC_120,
2036                                         SCSI_DENSITY_QIC_24,
2037                                         SCSI_DENSITY_QIC_11_9TRK,
2038                                         SCSI_DENSITY_QIC_11_4TRK,
2039                                         SCSI_DENSITY_QIC_1320,
2040                                         SCSI_DENSITY_QIC_3080,
2041                                         0
2042                                 };
2043                                 for (i = 0; ctry[i]; i++) {
2044                                         error = sasetparams(periph,
2045                                             SA_PARAM_DENSITY, 0, ctry[i],
2046                                             0, SF_NO_PRINT);
2047                                         if (error == 0) {
2048                                                 softc->media_density = ctry[i];
2049                                                 break;
2050                                         }
2051                                 }
2052                         }
2053                         switch (softc->media_density) {
2054                         case SCSI_DENSITY_QIC_11_4TRK:
2055                         case SCSI_DENSITY_QIC_11_9TRK:
2056                         case SCSI_DENSITY_QIC_24:
2057                         case SCSI_DENSITY_QIC_120:
2058                         case SCSI_DENSITY_QIC_150:
2059                         case SCSI_DENSITY_QIC_525_320:
2060                         case SCSI_DENSITY_QIC_1320:
2061                         case SCSI_DENSITY_QIC_3080:
2062                                 softc->quirks &= ~SA_QUIRK_2FM;
2063                                 softc->quirks |= SA_QUIRK_FIXED|SA_QUIRK_1FM;
2064                                 softc->last_media_blksize = 512;
2065                                 break;
2066                         case SCSI_DENSITY_QIC_4GB:
2067                         case SCSI_DENSITY_QIC_2GB:
2068                                 softc->quirks &= ~SA_QUIRK_2FM;
2069                                 softc->quirks |= SA_QUIRK_FIXED|SA_QUIRK_1FM;
2070                                 softc->last_media_blksize = 1024;
2071                                 break;
2072                         default:
2073                                 softc->last_media_blksize =
2074                                     softc->media_blksize;
2075                                 softc->quirks |= SA_QUIRK_VARIABLE;
2076                                 break;
2077                         }
2078                 }
2079
2080                 /*
2081                  * If no quirk has determined that this is a device that needs
2082                  * to have 2 Filemarks at EOD, now is the time to find out.
2083                  */
2084
2085                 if ((softc->quirks & SA_QUIRK_2FM) == 0) {
2086                         switch (softc->media_density) {
2087                         case SCSI_DENSITY_HALFINCH_800:
2088                         case SCSI_DENSITY_HALFINCH_1600:
2089                         case SCSI_DENSITY_HALFINCH_6250:
2090                         case SCSI_DENSITY_HALFINCH_6250C:
2091                         case SCSI_DENSITY_HALFINCH_PE:
2092                                 softc->quirks &= ~SA_QUIRK_1FM;
2093                                 softc->quirks |= SA_QUIRK_2FM;
2094                                 break;
2095                         default:
2096                                 break;
2097                         }
2098                 }
2099
2100                 /*
2101                  * Now validate that some info we got makes sense.
2102                  */
2103                 if ((softc->max_blk < softc->media_blksize) ||
2104                     (softc->min_blk > softc->media_blksize &&
2105                     softc->media_blksize)) {
2106                         xpt_print_path(ccb->ccb_h.path);
2107                         printf("BLOCK LIMITS (%d..%d) could not match current "
2108                             "block settings (%d)- adjusting\n", softc->min_blk,
2109                             softc->max_blk, softc->media_blksize);
2110                         softc->max_blk = softc->min_blk =
2111                             softc->media_blksize;
2112                 }
2113
2114                 /*
2115                  * Now put ourselves into the right frame of mind based
2116                  * upon quirks...
2117                  */
2118 tryagain:
2119                 /*
2120                  * If we want to be in FIXED mode and our current blocksize
2121                  * is not equal to our last blocksize (if nonzero), try and
2122                  * set ourselves to this last blocksize (as the 'preferred'
2123                  * block size).  The initial quirkmatch at registry sets the
2124                  * initial 'last' blocksize. If, for whatever reason, this
2125                  * 'last' blocksize is zero, set the blocksize to 512,
2126                  * or min_blk if that's larger.
2127                  */
2128                 if ((softc->quirks & SA_QUIRK_FIXED) &&
2129                     (softc->quirks & SA_QUIRK_NO_MODESEL) == 0 &&
2130                     (softc->media_blksize != softc->last_media_blksize)) {
2131                         softc->media_blksize = softc->last_media_blksize;
2132                         if (softc->media_blksize == 0) {
2133                                 softc->media_blksize = 512;
2134                                 if (softc->media_blksize < softc->min_blk) {
2135                                         softc->media_blksize = softc->min_blk;
2136                                 }
2137                         }
2138                         error = sasetparams(periph, SA_PARAM_BLOCKSIZE,
2139                             softc->media_blksize, 0, 0, SF_NO_PRINT);
2140                         if (error) {
2141                                 xpt_print_path(ccb->ccb_h.path);
2142                                 printf("unable to set fixed blocksize to %d\n",
2143                                      softc->media_blksize);
2144                                 goto exit;
2145                         }
2146                 }
2147
2148                 if ((softc->quirks & SA_QUIRK_VARIABLE) &&
2149                     (softc->media_blksize != 0)) {
2150                         softc->last_media_blksize = softc->media_blksize;
2151                         softc->media_blksize = 0;
2152                         error = sasetparams(periph, SA_PARAM_BLOCKSIZE,
2153                             0, 0, 0, SF_NO_PRINT);
2154                         if (error) {
2155                                 /*
2156                                  * If this fails and we were guessing, just
2157                                  * assume that we got it wrong and go try
2158                                  * fixed block mode. Don't even check against
2159                                  * density code at this point.
2160                                  */
2161                                 if (guessing) {
2162                                         softc->quirks &= ~SA_QUIRK_VARIABLE;
2163                                         softc->quirks |= SA_QUIRK_FIXED;
2164                                         if (softc->last_media_blksize == 0)
2165                                                 softc->last_media_blksize = 512;
2166                                         goto tryagain;
2167                                 }
2168                                 xpt_print_path(ccb->ccb_h.path);
2169                                 printf("unable to set variable blocksize\n");
2170                                 goto exit;
2171                         }
2172                 }
2173
2174                 /*
2175                  * Now that we have the current block size,
2176                  * set up some parameters for sastart's usage.
2177                  */
2178                 if (softc->media_blksize) {
2179                         softc->flags |= SA_FLAG_FIXED;
2180                         if (powerof2(softc->media_blksize)) {
2181                                 softc->blk_shift =
2182                                     ffs(softc->media_blksize) - 1;
2183                                 softc->blk_mask = softc->media_blksize - 1;
2184                         } else {
2185                                 softc->blk_mask = ~0;
2186                                 softc->blk_shift = 0;
2187                         }
2188                 } else {
2189                         /*
2190                          * The SCSI-3 spec allows 0 to mean "unspecified".
2191                          * The SCSI-1 spec allows 0 to mean 'infinite'.
2192                          *
2193                          * Either works here.
2194                          */
2195                         if (softc->max_blk == 0) {
2196                                 softc->max_blk = ~0;
2197                         }
2198                         softc->blk_shift = 0;
2199                         if (softc->blk_gran != 0) {
2200                                 softc->blk_mask = softc->blk_gran - 1;
2201                         } else {
2202                                 softc->blk_mask = 0;
2203                         }
2204                 }
2205
2206                 if (write_protect)
2207                         softc->flags |= SA_FLAG_TAPE_WP;
2208
2209                 if (comp_supported) {
2210                         if (softc->saved_comp_algorithm == 0)
2211                                 softc->saved_comp_algorithm =
2212                                     softc->comp_algorithm;
2213                         softc->flags |= SA_FLAG_COMP_SUPP;
2214                         if (comp_enabled)
2215                                 softc->flags |= SA_FLAG_COMP_ENABLED;
2216                 } else
2217                         softc->flags |= SA_FLAG_COMP_UNSUPP;
2218
2219                 if ((softc->buffer_mode == SMH_SA_BUF_MODE_NOBUF) &&
2220                     (softc->quirks & SA_QUIRK_NO_MODESEL) == 0) {
2221                         error = sasetparams(periph, SA_PARAM_BUFF_MODE, 0,
2222                             0, 0, SF_NO_PRINT);
2223                         if (error == 0) {
2224                                 softc->buffer_mode = SMH_SA_BUF_MODE_SIBUF;
2225                         } else {
2226                                 xpt_print_path(ccb->ccb_h.path);
2227                                 printf("unable to set buffered mode\n");
2228                         }
2229                         error = 0;      /* not an error */
2230                 }
2231
2232
2233                 if (error == 0) {
2234                         softc->flags |= SA_FLAG_TAPE_MOUNTED;
2235                 }
2236 exit:
2237                 if (rblim != NULL)
2238                         free(rblim, M_TEMP);
2239
2240                 if (error != 0) {
2241                         softc->dsreg = MTIO_DSREG_NIL;
2242                 } else {
2243                         softc->fileno = softc->blkno = 0;
2244                         softc->dsreg = MTIO_DSREG_REST;
2245                 }
2246 #ifdef  SA_1FM_AT_EOD
2247                 if ((softc->quirks & SA_QUIRK_2FM) == 0)
2248                         softc->quirks |= SA_QUIRK_1FM;
2249 #else
2250                 if ((softc->quirks & SA_QUIRK_1FM) == 0)
2251                         softc->quirks |= SA_QUIRK_2FM;
2252 #endif
2253         } else
2254                 xpt_release_ccb(ccb);
2255
2256         /*
2257          * If we return an error, we're not mounted any more,
2258          * so release any device reservation.
2259          */
2260         if (error != 0) {
2261                 (void) sareservereleaseunit(periph, FALSE);
2262         } else {
2263                 /*
2264                  * Clear I/O residual.
2265                  */
2266                 softc->last_io_resid = 0;
2267                 softc->last_ctl_resid = 0;
2268         }
2269         return (error);
2270 }
2271
2272 /*
2273  * How many filemarks do we need to write if we were to terminate the
2274  * tape session right now? Note that this can be a negative number
2275  */
2276
2277 static int
2278 samarkswanted(struct cam_periph *periph)
2279 {
2280         int     markswanted;
2281         struct  sa_softc *softc;
2282
2283         softc = (struct sa_softc *)periph->softc;
2284         markswanted = 0;
2285         if ((softc->flags & SA_FLAG_TAPE_WRITTEN) != 0) {
2286                 markswanted++;
2287                 if (softc->quirks & SA_QUIRK_2FM)
2288                         markswanted++;
2289         }
2290         markswanted -= softc->filemarks;
2291         return (markswanted);
2292 }
2293
2294 static int
2295 sacheckeod(struct cam_periph *periph)
2296 {
2297         int     error;
2298         int     markswanted;
2299         struct  sa_softc *softc;
2300
2301         softc = (struct sa_softc *)periph->softc;
2302         markswanted = samarkswanted(periph);
2303
2304         if (markswanted > 0) {
2305                 error = sawritefilemarks(periph, markswanted, FALSE);
2306         } else {
2307                 error = 0;
2308         }
2309         return (error);
2310 }
2311
2312 static int
2313 saerror(union ccb *ccb, u_int32_t cflgs, u_int32_t sflgs)
2314 {
2315         static const char *toobig =
2316             "%d-byte tape record bigger than supplied buffer\n";
2317         struct  cam_periph *periph;
2318         struct  sa_softc *softc;
2319         struct  ccb_scsiio *csio;
2320         struct  scsi_sense_data *sense;
2321         u_int32_t resid = 0;
2322         int32_t info = 0;
2323         cam_status status;
2324         int error_code, sense_key, asc, ascq, error, aqvalid;
2325
2326         periph = xpt_path_periph(ccb->ccb_h.path);
2327         softc = (struct sa_softc *)periph->softc;
2328         csio = &ccb->csio;
2329         sense = &csio->sense_data;
2330         scsi_extract_sense(sense, &error_code, &sense_key, &asc, &ascq);
2331         aqvalid = sense->extra_len >= 6;
2332         error = 0;
2333
2334         status = csio->ccb_h.status & CAM_STATUS_MASK;
2335
2336         /*
2337          * Calculate/latch up, any residuals... We do this in a funny 2-step
2338          * so we can print stuff here if we have CAM_DEBUG enabled for this
2339          * unit.
2340          */
2341         if (status == CAM_SCSI_STATUS_ERROR) {
2342                 if ((sense->error_code & SSD_ERRCODE_VALID) != 0) {
2343                         info = (int32_t) scsi_4btoul(sense->info);
2344                         resid = info;
2345                         if ((softc->flags & SA_FLAG_FIXED) != 0)
2346                                 resid *= softc->media_blksize;
2347                 } else {
2348                         resid = csio->dxfer_len;
2349                         info = resid;
2350                         if ((softc->flags & SA_FLAG_FIXED) != 0) {
2351                                 if (softc->media_blksize)
2352                                         info /= softc->media_blksize;
2353                         }
2354                 }
2355                 if (CCB_Type(csio) == SA_CCB_BUFFER_IO) {
2356                         bcopy((caddr_t) sense, (caddr_t) &softc->last_io_sense,
2357                             sizeof (struct scsi_sense_data));
2358                         bcopy(csio->cdb_io.cdb_bytes, softc->last_io_cdb,
2359                             (int) csio->cdb_len);
2360                         softc->last_io_resid = resid;
2361                         softc->last_resid_was_io = 1;
2362                 } else {
2363                         bcopy((caddr_t) sense, (caddr_t) &softc->last_ctl_sense,
2364                             sizeof (struct scsi_sense_data));
2365                         bcopy(csio->cdb_io.cdb_bytes, softc->last_ctl_cdb,
2366                             (int) csio->cdb_len);
2367                         softc->last_ctl_resid = resid;
2368                         softc->last_resid_was_io = 0;
2369                 }
2370                 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, ("CDB[0]=0x%x Key 0x%x "
2371                     "ASC/ASCQ 0x%x/0x%x CAM STATUS 0x%x flags 0x%x resid %d "
2372                     "dxfer_len %d\n", csio->cdb_io.cdb_bytes[0] & 0xff,
2373                     sense_key, asc, ascq, status,
2374                     sense->flags & ~SSD_KEY_RESERVED, resid, csio->dxfer_len));
2375         } else {
2376                 CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
2377                     ("Cam Status 0x%x\n", status));
2378         }
2379
2380         switch (status) {
2381         case CAM_REQ_CMP:
2382                 return (0);
2383         case CAM_SCSI_STATUS_ERROR:
2384                 /*
2385                  * If a read/write command, we handle it here.
2386                  */
2387                 if (CCB_Type(csio) != SA_CCB_WAITING) {
2388                         break;
2389                 }
2390                 /*
2391                  * If this was just EOM/EOP, Filemark, Setmark or ILI detected
2392                  * on a non read/write command, we assume it's not an error
2393                  * and propagate the residule and return.
2394                  */
2395                 if ((aqvalid && asc == 0 && ascq > 0 && ascq <= 5) ||
2396                     (aqvalid == 0 && sense_key == SSD_KEY_NO_SENSE)) {
2397                         csio->resid = resid;
2398                         QFRLS(ccb);
2399                         return (0);
2400                 }
2401                 /*
2402                  * Otherwise, we let the common code handle this.
2403                  */
2404                 return (cam_periph_error(ccb, cflgs, sflgs, &softc->saved_ccb));
2405
2406         /*
2407          * XXX: To Be Fixed
2408          * We cannot depend upon CAM honoring retry counts for these.
2409          */
2410         case CAM_SCSI_BUS_RESET:
2411         case CAM_BDR_SENT:
2412                 if (ccb->ccb_h.retry_count <= 0) {
2413                         return (EIO);
2414                         break;
2415                 }
2416                 /* FALLTHROUGH */
2417         default:
2418                 return (cam_periph_error(ccb, cflgs, sflgs, &softc->saved_ccb));
2419         }
2420
2421         /*
2422          * Handle filemark, end of tape, mismatched record sizes....
2423          * From this point out, we're only handling read/write cases.
2424          * Handle writes && reads differently.
2425          */
2426
2427         if (csio->cdb_io.cdb_bytes[0] == SA_WRITE) {
2428                 if (sense_key == SSD_KEY_VOLUME_OVERFLOW) {
2429                         csio->resid = resid;
2430                         error = ENOSPC;
2431                 } else if (sense->flags & SSD_EOM) {
2432                         softc->flags |= SA_FLAG_EOM_PENDING;
2433                         /*
2434                          * Grotesque as it seems, the few times
2435                          * I've actually seen a non-zero resid,
2436                          * the tape drive actually lied and had
2437                          * writtent all the data!.
2438                          */
2439                         csio->resid = 0;
2440                 }
2441         } else {
2442                 csio->resid = resid;
2443                 if (sense_key == SSD_KEY_BLANK_CHECK) {
2444                         if (softc->quirks & SA_QUIRK_1FM) {
2445                                 error = 0;
2446                                 softc->flags |= SA_FLAG_EOM_PENDING;
2447                         } else {
2448                                 error = EIO;
2449                         }
2450                 } else if (sense->flags & SSD_FILEMARK) {
2451                         if (softc->flags & SA_FLAG_FIXED) {
2452                                 error = -1;
2453                                 softc->flags |= SA_FLAG_EOF_PENDING;
2454                         }
2455                         /*
2456                          * Unconditionally, if we detected a filemark on a read,
2457                          * mark that we've run moved a file ahead.
2458                          */
2459                         if (softc->fileno != (daddr_t) -1) {
2460                                 softc->fileno++;
2461                                 softc->blkno = 0;
2462                                 csio->ccb_h.ccb_pflags |= SA_POSITION_UPDATED;
2463                         }
2464                 }
2465         }
2466
2467         /*
2468          * Incorrect Length usually applies to read, but can apply to writes.
2469          */
2470         if (error == 0 && (sense->flags & SSD_ILI)) {
2471                 if (info < 0) {
2472                         xpt_print_path(csio->ccb_h.path);
2473                         printf(toobig, csio->dxfer_len - info);
2474                         csio->resid = csio->dxfer_len;
2475                         error = EIO;
2476                 } else {
2477                         csio->resid = resid;
2478                         if (softc->flags & SA_FLAG_FIXED) {
2479                                 softc->flags |= SA_FLAG_EIO_PENDING;
2480                         }
2481                         /*
2482                          * Bump the block number if we hadn't seen a filemark.
2483                          * Do this independent of errors (we've moved anyway).
2484                          */
2485                         if ((sense->flags & SSD_FILEMARK) == 0) {
2486                                 if (softc->blkno != (daddr_t) -1) {
2487                                         softc->blkno++;
2488                                         csio->ccb_h.ccb_pflags |=
2489                                            SA_POSITION_UPDATED;
2490                                 }
2491                         }
2492                 }
2493         }
2494
2495         if (error <= 0) {
2496                 /*
2497                  * Unfreeze the queue if frozen as we're not returning anything
2498                  * to our waiters that would indicate an I/O error has occurred
2499                  * (yet).
2500                  */
2501                 QFRLS(ccb);
2502                 error = 0;
2503         }
2504         return (error);
2505 }
2506
2507 static int
2508 sagetparams(struct cam_periph *periph, sa_params params_to_get,
2509             u_int32_t *blocksize, u_int8_t *density, u_int32_t *numblocks,
2510             int *buff_mode, u_int8_t *write_protect, u_int8_t *speed,
2511             int *comp_supported, int *comp_enabled, u_int32_t *comp_algorithm,
2512             sa_comp_t *tcs)
2513 {
2514         union ccb *ccb;
2515         void *mode_buffer;
2516         struct scsi_mode_header_6 *mode_hdr;
2517         struct scsi_mode_blk_desc *mode_blk;
2518         int mode_buffer_len;
2519         struct sa_softc *softc;
2520         u_int8_t cpage;
2521         int error;
2522         cam_status status;
2523
2524         softc = (struct sa_softc *)periph->softc;
2525         ccb = cam_periph_getccb(periph, 1);
2526         if (softc->quirks & SA_QUIRK_NO_CPAGE)
2527                 cpage = SA_DEVICE_CONFIGURATION_PAGE;
2528         else
2529                 cpage = SA_DATA_COMPRESSION_PAGE;
2530
2531 retry:
2532         mode_buffer_len = sizeof(*mode_hdr) + sizeof(*mode_blk);
2533
2534         if (params_to_get & SA_PARAM_COMPRESSION) {
2535                 if (softc->quirks & SA_QUIRK_NOCOMP) {
2536                         *comp_supported = FALSE;
2537                         params_to_get &= ~SA_PARAM_COMPRESSION;
2538                 } else
2539                         mode_buffer_len += sizeof (sa_comp_t);
2540         }
2541
2542         mode_buffer = malloc(mode_buffer_len, M_TEMP, M_INTWAIT | M_ZERO);
2543         mode_hdr = (struct scsi_mode_header_6 *)mode_buffer;
2544         mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1];
2545
2546         /* it is safe to retry this */
2547         scsi_mode_sense(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, FALSE,
2548             SMS_PAGE_CTRL_CURRENT, (params_to_get & SA_PARAM_COMPRESSION) ?
2549             cpage : SMS_VENDOR_SPECIFIC_PAGE, mode_buffer, mode_buffer_len,
2550             SSD_FULL_SIZE, SCSIOP_TIMEOUT);
2551
2552         error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
2553             &softc->device_stats);
2554         QFRLS(ccb);
2555
2556         status = ccb->ccb_h.status & CAM_STATUS_MASK;
2557
2558         if (error == EINVAL && (params_to_get & SA_PARAM_COMPRESSION) != 0) {
2559                 /*
2560                  * Hmm. Let's see if we can try another page...
2561                  * If we've already done that, give up on compression
2562                  * for this device and remember this for the future
2563                  * and attempt the request without asking for compression
2564                  * info.
2565                  */
2566                 if (cpage == SA_DATA_COMPRESSION_PAGE) {
2567                         cpage = SA_DEVICE_CONFIGURATION_PAGE;
2568                         goto retry;
2569                 }
2570                 softc->quirks |= SA_QUIRK_NOCOMP;
2571                 free(mode_buffer, M_TEMP);
2572                 goto retry;
2573         } else if (status == CAM_SCSI_STATUS_ERROR) {
2574                 /* Tell the user about the fatal error. */
2575                 scsi_sense_print(&ccb->csio);
2576                 goto sagetparamsexit;
2577         }
2578
2579         /*
2580          * If the user only wants the compression information, and
2581          * the device doesn't send back the block descriptor, it's
2582          * no big deal.  If the user wants more than just
2583          * compression, though, and the device doesn't pass back the
2584          * block descriptor, we need to send another mode sense to
2585          * get the block descriptor.
2586          */
2587         if ((mode_hdr->blk_desc_len == 0) &&
2588             (params_to_get & SA_PARAM_COMPRESSION) &&
2589             (params_to_get & ~(SA_PARAM_COMPRESSION))) {
2590
2591                 /*
2592                  * Decrease the mode buffer length by the size of
2593                  * the compression page, to make sure the data
2594                  * there doesn't get overwritten.
2595                  */
2596                 mode_buffer_len -= sizeof (sa_comp_t);
2597
2598                 /*
2599                  * Now move the compression page that we presumably
2600                  * got back down the memory chunk a little bit so
2601                  * it doesn't get spammed.
2602                  */
2603                 bcopy(&mode_hdr[0], &mode_hdr[1], sizeof (sa_comp_t));
2604                 bzero(&mode_hdr[0], sizeof (mode_hdr[0]));
2605
2606                 /*
2607                  * Now, we issue another mode sense and just ask
2608                  * for the block descriptor, etc.
2609                  */
2610
2611                 scsi_mode_sense(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, FALSE,
2612                     SMS_PAGE_CTRL_CURRENT, SMS_VENDOR_SPECIFIC_PAGE,
2613                     mode_buffer, mode_buffer_len, SSD_FULL_SIZE,
2614                     SCSIOP_TIMEOUT);
2615
2616                 error = cam_periph_runccb(ccb, saerror, 0, SF_NO_PRINT,
2617                     &softc->device_stats);
2618                 QFRLS(ccb);
2619
2620                 if (error != 0)
2621                         goto sagetparamsexit;
2622         }
2623
2624         if (params_to_get & SA_PARAM_BLOCKSIZE)
2625                 *blocksize = scsi_3btoul(mode_blk->blklen);
2626
2627         if (params_to_get & SA_PARAM_NUMBLOCKS)
2628                 *numblocks = scsi_3btoul(mode_blk->nblocks);
2629
2630         if (params_to_get & SA_PARAM_BUFF_MODE)
2631                 *buff_mode = mode_hdr->dev_spec & SMH_SA_BUF_MODE_MASK;
2632
2633         if (params_to_get & SA_PARAM_DENSITY)
2634                 *density = mode_blk->density;
2635
2636         if (params_to_get & SA_PARAM_WP)
2637                 *write_protect = (mode_hdr->dev_spec & SMH_SA_WP)? TRUE : FALSE;
2638
2639         if (params_to_get & SA_PARAM_SPEED)
2640                 *speed = mode_hdr->dev_spec & SMH_SA_SPEED_MASK;
2641
2642         if (params_to_get & SA_PARAM_COMPRESSION) {
2643                 sa_comp_t *ntcs = (sa_comp_t *) &mode_blk[1];
2644                 if (cpage == SA_DATA_COMPRESSION_PAGE) {
2645                         struct scsi_data_compression_page *cp = &ntcs->dcomp;
2646                         *comp_supported =
2647                             (cp->dce_and_dcc & SA_DCP_DCC)? TRUE : FALSE;
2648                         *comp_enabled =
2649                             (cp->dce_and_dcc & SA_DCP_DCE)? TRUE : FALSE;
2650                         *comp_algorithm = scsi_4btoul(cp->comp_algorithm);
2651                 } else {
2652                         struct scsi_dev_conf_page *cp = &ntcs->dconf;
2653                         /*
2654                          * We don't really know whether this device supports
2655                          * Data Compression if the the algorithm field is
2656                          * zero. Just say we do.
2657                          */
2658                         *comp_supported = TRUE;
2659                         *comp_enabled =
2660                             (cp->sel_comp_alg != SA_COMP_NONE)? TRUE : FALSE;
2661                         *comp_algorithm = cp->sel_comp_alg;
2662                 }
2663                 if (tcs != NULL)
2664                         bcopy(ntcs, tcs, sizeof (sa_comp_t));
2665         }
2666
2667         if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
2668                 int idx;
2669                 char *xyz = mode_buffer;
2670                 xpt_print_path(periph->path);
2671                 printf("Mode Sense Data=");
2672                 for (idx = 0; idx < mode_buffer_len; idx++)
2673                         printf(" 0x%02x", xyz[idx] & 0xff);
2674                 printf("\n");
2675         }
2676
2677 sagetparamsexit:
2678
2679         xpt_release_ccb(ccb);
2680         free(mode_buffer, M_TEMP);
2681         return (error);
2682 }
2683
2684 /*
2685  * The purpose of this function is to set one of four different parameters
2686  * for a tape drive:
2687  *      - blocksize
2688  *      - density
2689  *      - compression / compression algorithm
2690  *      - buffering mode
2691  *
2692  * The assumption is that this will be called from saioctl(), and therefore
2693  * from a process context.  Thus the waiting malloc calls below.  If that
2694  * assumption ever changes, the malloc calls should be changed to be
2695  * NOWAIT mallocs.
2696  *
2697  * Any or all of the four parameters may be set when this function is
2698  * called.  It should handle setting more than one parameter at once.
2699  */
2700 static int
2701 sasetparams(struct cam_periph *periph, sa_params params_to_set,
2702             u_int32_t blocksize, u_int8_t density, u_int32_t calg,
2703             u_int32_t sense_flags)
2704 {
2705         struct sa_softc *softc;
2706         u_int32_t current_blocksize;
2707         u_int32_t current_calg;
2708         u_int8_t current_density;
2709         u_int8_t current_speed;
2710         int comp_enabled, comp_supported;
2711         void *mode_buffer;
2712         int mode_buffer_len;
2713         struct scsi_mode_header_6 *mode_hdr;
2714         struct scsi_mode_blk_desc *mode_blk;
2715         sa_comp_t *ccomp, *cpage;
2716         int buff_mode;
2717         union ccb *ccb = NULL;
2718         int error;
2719
2720         softc = (struct sa_softc *)periph->softc;
2721
2722         ccomp = malloc(sizeof (sa_comp_t), M_TEMP, M_INTWAIT);
2723
2724         /*
2725          * Since it doesn't make sense to set the number of blocks, or
2726          * write protection, we won't try to get the current value.  We
2727          * always want to get the blocksize, so we can set it back to the
2728          * proper value.
2729          */
2730         error = sagetparams(periph,
2731             params_to_set | SA_PARAM_BLOCKSIZE | SA_PARAM_SPEED,
2732             &current_blocksize, &current_density, NULL, &buff_mode, NULL,
2733             &current_speed, &comp_supported, &comp_enabled,
2734             &current_calg, ccomp);
2735
2736         if (error != 0) {
2737                 free(ccomp, M_TEMP);
2738                 return (error);
2739         }
2740
2741         mode_buffer_len = sizeof(*mode_hdr) + sizeof(*mode_blk);
2742         if (params_to_set & SA_PARAM_COMPRESSION)
2743                 mode_buffer_len += sizeof (sa_comp_t);
2744
2745         mode_buffer = malloc(mode_buffer_len, M_TEMP, M_INTWAIT | M_ZERO);
2746
2747         mode_hdr = (struct scsi_mode_header_6 *)mode_buffer;
2748         mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1];
2749
2750         ccb = cam_periph_getccb(periph, 1);
2751
2752 retry:
2753
2754         if (params_to_set & SA_PARAM_COMPRESSION) {
2755                 if (mode_blk) {
2756                         cpage = (sa_comp_t *)&mode_blk[1];
2757                 } else {
2758                         cpage = (sa_comp_t *)&mode_hdr[1];
2759                 }
2760                 bcopy(ccomp, cpage, sizeof (sa_comp_t));
2761                 cpage->hdr.pagecode &= ~0x80;
2762         } else
2763                 cpage = NULL;
2764
2765         /*
2766          * If the caller wants us to set the blocksize, use the one they
2767          * pass in.  Otherwise, use the blocksize we got back from the
2768          * mode select above.
2769          */
2770         if (mode_blk) {
2771                 if (params_to_set & SA_PARAM_BLOCKSIZE)
2772                         scsi_ulto3b(blocksize, mode_blk->blklen);
2773                 else
2774                         scsi_ulto3b(current_blocksize, mode_blk->blklen);
2775
2776                 /*
2777                  * Set density if requested, else preserve old density.
2778                  * SCSI_SAME_DENSITY only applies to SCSI-2 or better
2779                  * devices, else density we've latched up in our softc.
2780                  */
2781                 if (params_to_set & SA_PARAM_DENSITY) {
2782                         mode_blk->density = density;
2783                 } else if (softc->scsi_rev > SCSI_REV_CCS) {
2784                         mode_blk->density = SCSI_SAME_DENSITY;
2785                 } else {
2786                         mode_blk->density = softc->media_density;
2787                 }
2788         }
2789
2790         /*
2791          * For mode selects, these two fields must be zero.
2792          */
2793         mode_hdr->data_length = 0;
2794         mode_hdr->medium_type = 0;
2795
2796         /* set the speed to the current value */
2797         mode_hdr->dev_spec = current_speed;
2798
2799         /* set single-initiator buffering mode */
2800         mode_hdr->dev_spec |= SMH_SA_BUF_MODE_SIBUF;
2801
2802         if (mode_blk)
2803                 mode_hdr->blk_desc_len = sizeof(struct scsi_mode_blk_desc);
2804         else
2805                 mode_hdr->blk_desc_len = 0;
2806
2807         /*
2808          * First, if the user wants us to set the compression algorithm or
2809          * just turn compression on, check to make sure that this drive
2810          * supports compression.
2811          */
2812         if (params_to_set & SA_PARAM_COMPRESSION) {
2813                 /*
2814                  * If the compression algorithm is 0, disable compression.
2815                  * If the compression algorithm is non-zero, enable
2816                  * compression and set the compression type to the
2817                  * specified compression algorithm, unless the algorithm is
2818                  * MT_COMP_ENABLE.  In that case, we look at the
2819                  * compression algorithm that is currently set and if it is
2820                  * non-zero, we leave it as-is.  If it is zero, and we have
2821                  * saved a compression algorithm from a time when
2822                  * compression was enabled before, set the compression to
2823                  * the saved value.
2824                  */
2825                 switch (ccomp->hdr.pagecode & ~0x80) {
2826                 case SA_DATA_COMPRESSION_PAGE:
2827                 if (ccomp->dcomp.dce_and_dcc & SA_DCP_DCC) {
2828                         struct scsi_data_compression_page *dcp = &cpage->dcomp;
2829                         if (calg == 0) {
2830                                 /*
2831                                  * Disable compression, but leave the
2832                                  * decompression and the capability bit
2833                                  * alone.
2834                                  */
2835                                 dcp->dce_and_dcc = SA_DCP_DCC;
2836                                 dcp->dde_and_red |= SA_DCP_DDE;
2837                                 break;
2838                         }
2839                         /* enable compression && decompression */
2840                         dcp->dce_and_dcc = SA_DCP_DCE | SA_DCP_DCC;
2841                         dcp->dde_and_red |= SA_DCP_DDE;
2842                         /*
2843                          * If there, use compression algorithm from caller.
2844                          * Otherwise, if there's a saved compression algorithm
2845                          * and there is no current algorithm, use the saved
2846                          * algorithm. Else parrot back what we got and hope
2847                          * for the best.
2848                          */
2849                         if (calg != MT_COMP_ENABLE) {
2850                                 scsi_ulto4b(calg, dcp->comp_algorithm);
2851                                 scsi_ulto4b(calg, dcp->decomp_algorithm);
2852                         } else if (scsi_4btoul(dcp->comp_algorithm) == 0 &&
2853                             softc->saved_comp_algorithm != 0) {
2854                                 scsi_ulto4b(softc->saved_comp_algorithm,
2855                                     dcp->comp_algorithm);
2856                                 scsi_ulto4b(softc->saved_comp_algorithm,
2857                                     dcp->decomp_algorithm);
2858                         }
2859                         break;
2860                 }
2861                 case SA_DEVICE_CONFIGURATION_PAGE:
2862                 {
2863                         struct scsi_dev_conf_page *dcp = &cpage->dconf;
2864                         if (calg == 0) {
2865                                 dcp->sel_comp_alg = SA_COMP_NONE;
2866                                 break;
2867                         }
2868                         if (calg != MT_COMP_ENABLE) {
2869                                 dcp->sel_comp_alg = calg;
2870                         } else if (dcp->sel_comp_alg == SA_COMP_NONE &&
2871                             softc->saved_comp_algorithm != 0) {
2872                                 dcp->sel_comp_alg = softc->saved_comp_algorithm;
2873                         }
2874                         break;
2875                 }
2876                 default:
2877                         /*
2878                          * The drive doesn't seem to support compression,
2879                          * so turn off the set compression bit.
2880                          */
2881                         params_to_set &= ~SA_PARAM_COMPRESSION;
2882                         xpt_print_path(periph->path);
2883                         printf("device does not seem to support compression\n");
2884
2885                         /*
2886                          * If that was the only thing the user wanted us to set,
2887                          * clean up allocated resources and return with
2888                          * 'operation not supported'.
2889                          */
2890                         if (params_to_set == SA_PARAM_NONE) {
2891                                 free(mode_buffer, M_TEMP);
2892                                 xpt_release_ccb(ccb);
2893                                 return (ENODEV);
2894                         }
2895
2896                         /*
2897                          * That wasn't the only thing the user wanted us to set.
2898                          * So, decrease the stated mode buffer length by the
2899                          * size of the compression mode page.
2900                          */
2901                         mode_buffer_len -= sizeof(sa_comp_t);
2902                 }
2903         }
2904
2905         /* It is safe to retry this operation */
2906         scsi_mode_select(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG,
2907             (params_to_set & SA_PARAM_COMPRESSION)? TRUE : FALSE,
2908             FALSE, mode_buffer, mode_buffer_len, SSD_FULL_SIZE, SCSIOP_TIMEOUT);
2909
2910         error = cam_periph_runccb(ccb, saerror, 0,
2911             sense_flags, &softc->device_stats);
2912         QFRLS(ccb);
2913
2914         if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
2915                 int idx;
2916                 char *xyz = mode_buffer;
2917                 xpt_print_path(periph->path);
2918                 printf("Err%d, Mode Select Data=", error);
2919                 for (idx = 0; idx < mode_buffer_len; idx++)
2920                         printf(" 0x%02x", xyz[idx] & 0xff);
2921                 printf("\n");
2922         }
2923
2924
2925         if (error) {
2926                 /*
2927                  * If we can, try without setting density/blocksize.
2928                  */
2929                 if (mode_blk) {
2930                         if ((params_to_set &
2931                             (SA_PARAM_DENSITY|SA_PARAM_BLOCKSIZE)) == 0) {
2932                                 mode_blk = NULL;
2933                                 goto retry;
2934                         }
2935                 } else {
2936                         mode_blk = (struct scsi_mode_blk_desc *)&mode_hdr[1];
2937                         cpage = (sa_comp_t *)&mode_blk[1];
2938                 }
2939
2940                 /*
2941                  * If we were setting the blocksize, and that failed, we
2942                  * want to set it to its original value.  If we weren't
2943                  * setting the blocksize, we don't want to change it.
2944                  */
2945                 scsi_ulto3b(current_blocksize, mode_blk->blklen);
2946
2947                 /*
2948                  * Set density if requested, else preserve old density.
2949                  * SCSI_SAME_DENSITY only applies to SCSI-2 or better
2950                  * devices, else density we've latched up in our softc.
2951                  */
2952                 if (params_to_set & SA_PARAM_DENSITY) {
2953                         mode_blk->density = current_density;
2954                 } else if (softc->scsi_rev > SCSI_REV_CCS) {
2955                         mode_blk->density = SCSI_SAME_DENSITY;
2956                 } else {
2957                         mode_blk->density = softc->media_density;
2958                 }
2959
2960                 if (params_to_set & SA_PARAM_COMPRESSION)
2961                         bcopy(ccomp, cpage, sizeof (sa_comp_t));
2962
2963                 /*
2964                  * The retry count is the only CCB field that might have been
2965                  * changed that we care about, so reset it back to 1.
2966                  */
2967                 ccb->ccb_h.retry_count = 1;
2968                 cam_periph_runccb(ccb, saerror, 0, sense_flags,
2969                     &softc->device_stats);
2970                 QFRLS(ccb);
2971         }
2972
2973         xpt_release_ccb(ccb);
2974
2975         if (ccomp != NULL)
2976                 free(ccomp, M_TEMP);
2977
2978         if (params_to_set & SA_PARAM_COMPRESSION) {
2979                 if (error) {
2980                         softc->flags &= ~SA_FLAG_COMP_ENABLED;
2981                         /*
2982                          * Even if we get an error setting compression,
2983                          * do not say that we don't support it. We could
2984                          * have been wrong, or it may be media specific.
2985                          *      softc->flags &= ~SA_FLAG_COMP_SUPP;
2986                          */
2987                         softc->saved_comp_algorithm = softc->comp_algorithm;
2988                         softc->comp_algorithm = 0;
2989                 } else {
2990                         softc->flags |= SA_FLAG_COMP_ENABLED;
2991                         softc->comp_algorithm = calg;
2992                 }
2993         }
2994
2995         free(mode_buffer, M_TEMP);
2996         return (error);
2997 }
2998
2999 static void
3000 saprevent(struct cam_periph *periph, int action)
3001 {
3002         struct  sa_softc *softc;
3003         union   ccb *ccb;
3004         int     error, sf;
3005
3006         softc = (struct sa_softc *)periph->softc;
3007
3008         if ((action == PR_ALLOW) && (softc->flags & SA_FLAG_TAPE_LOCKED) == 0)
3009                 return;
3010         if ((action == PR_PREVENT) && (softc->flags & SA_FLAG_TAPE_LOCKED) != 0)
3011                 return;
3012
3013         /*
3014          * We can be quiet about illegal requests.
3015          */
3016         if (CAM_DEBUGGED(periph->path, CAM_DEBUG_INFO)) {
3017                 sf = 0;
3018         } else
3019                 sf = SF_QUIET_IR;
3020
3021         ccb = cam_periph_getccb(periph, 1);
3022
3023         /* It is safe to retry this operation */
3024         scsi_prevent(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, action,
3025             SSD_FULL_SIZE, SCSIOP_TIMEOUT);
3026
3027         error = cam_periph_runccb(ccb, saerror, 0, sf, &softc->device_stats);
3028         QFRLS(ccb);
3029         if (error == 0) {
3030                 if (action == PR_ALLOW)
3031                         softc->flags &= ~SA_FLAG_TAPE_LOCKED;
3032                 else
3033                         softc->flags |= SA_FLAG_TAPE_LOCKED;
3034         }
3035
3036         xpt_release_ccb(ccb);
3037 }
3038
3039 static int
3040 sarewind(struct cam_periph *periph)
3041 {
3042         union   ccb *ccb;
3043         struct  sa_softc *softc;
3044         int     error;
3045
3046         softc = (struct sa_softc *)periph->softc;
3047
3048         ccb = cam_periph_getccb(periph, 1);
3049
3050         /* It is safe to retry this operation */
3051         scsi_rewind(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG, FALSE,
3052             SSD_FULL_SIZE, REWIND_TIMEOUT);
3053
3054         softc->dsreg = MTIO_DSREG_REW;
3055         error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats);
3056         softc->dsreg = MTIO_DSREG_REST;
3057
3058         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3059                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE);
3060
3061         xpt_release_ccb(ccb);
3062         if (error == 0)
3063                 softc->fileno = softc->blkno = (daddr_t) 0;
3064         else
3065                 softc->fileno = softc->blkno = (daddr_t) -1;
3066         return (error);
3067 }
3068
3069 static int
3070 saspace(struct cam_periph *periph, int count, scsi_space_code code)
3071 {
3072         union   ccb *ccb;
3073         struct  sa_softc *softc;
3074         int     error;
3075
3076         softc = (struct sa_softc *)periph->softc;
3077
3078         ccb = cam_periph_getccb(periph, 1);
3079
3080         /* This cannot be retried */
3081
3082         scsi_space(&ccb->csio, 0, sadone, MSG_SIMPLE_Q_TAG, code, count,
3083             SSD_FULL_SIZE, SPACE_TIMEOUT);
3084
3085         /*
3086          * Clear residual because we will be using it.
3087          */
3088         softc->last_ctl_resid = 0;
3089
3090         softc->dsreg = (count < 0)? MTIO_DSREG_REV : MTIO_DSREG_FWD;
3091         error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats);
3092         softc->dsreg = MTIO_DSREG_REST;
3093
3094         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3095                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE);
3096
3097         xpt_release_ccb(ccb);
3098
3099         /*
3100          * If a spacing operation has failed, we need to invalidate
3101          * this mount.
3102          *
3103          * If the spacing operation was setmarks or to end of recorded data,
3104          * we no longer know our relative position.
3105          *
3106          * If the spacing operations was spacing files in reverse, we
3107          * take account of the residual, but still check against less
3108          * than zero- if we've gone negative, we must have hit BOT.
3109          *
3110          * If the spacing operations was spacing records in reverse and
3111          * we have a residual, we've either hit BOT or hit a filemark.
3112          * In the former case, we know our new record number (0). In
3113          * the latter case, we have absolutely no idea what the real
3114          * record number is- we've stopped between the end of the last
3115          * record in the previous file and the filemark that stopped
3116          * our spacing backwards.
3117          */
3118         if (error) {
3119                 softc->fileno = softc->blkno = (daddr_t) -1;
3120         } else if (code == SS_SETMARKS || code == SS_EOD) {
3121                 softc->fileno = softc->blkno = (daddr_t) -1;
3122         } else if (code == SS_FILEMARKS && softc->fileno != (daddr_t) -1) {
3123                 softc->fileno += (count - softc->last_ctl_resid);
3124                 if (softc->fileno < 0)  /* we must of hit BOT */
3125                         softc->fileno = 0;
3126                 softc->blkno = 0;
3127         } else if (code == SS_BLOCKS && softc->blkno != (daddr_t) -1) {
3128                 softc->blkno += (count - softc->last_ctl_resid);
3129                 if (count < 0) {
3130                         if (softc->last_ctl_resid || softc->blkno < 0) {
3131                                 if (softc->fileno == 0) {
3132                                         softc->blkno = 0;
3133                                 } else {
3134                                         softc->blkno = (daddr_t) -1;
3135                                 }
3136                         }
3137                 }
3138         }
3139         return (error);
3140 }
3141
3142 static int
3143 sawritefilemarks(struct cam_periph *periph, int nmarks, int setmarks)
3144 {
3145         union   ccb *ccb;
3146         struct  sa_softc *softc;
3147         int     error, nwm = 0;
3148
3149         softc = (struct sa_softc *)periph->softc;
3150
3151         ccb = cam_periph_getccb(periph, 1);
3152         /*
3153          * Clear residual because we will be using it.
3154          */
3155         softc->last_ctl_resid = 0;
3156
3157         softc->dsreg = MTIO_DSREG_FMK;
3158         /* this *must* not be retried */
3159         scsi_write_filemarks(&ccb->csio, 0, sadone, MSG_SIMPLE_Q_TAG,
3160             FALSE, setmarks, nmarks, SSD_FULL_SIZE, IO_TIMEOUT);
3161         softc->dsreg = MTIO_DSREG_REST;
3162
3163
3164         error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats);
3165
3166         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3167                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE);
3168
3169         if (error == 0 && nmarks) {
3170                 struct sa_softc *softc = (struct sa_softc *)periph->softc;
3171                 nwm = nmarks - softc->last_ctl_resid;
3172                 softc->filemarks += nwm;
3173         }
3174
3175         xpt_release_ccb(ccb);
3176
3177         /*
3178          * Update relative positions (if we're doing that).
3179          */
3180         if (error) {
3181                 softc->fileno = softc->blkno = (daddr_t) -1;
3182         } else if (softc->fileno != (daddr_t) -1) {
3183                 softc->fileno += nwm;
3184                 softc->blkno = 0;
3185         }
3186         return (error);
3187 }
3188
3189 static int
3190 sardpos(struct cam_periph *periph, int hard, u_int32_t *blkptr)
3191 {
3192         struct scsi_tape_position_data loc;
3193         union ccb *ccb;
3194         struct sa_softc *softc = (struct sa_softc *)periph->softc;
3195         int error;
3196
3197         /*
3198          * We try and flush any buffered writes here if we were writing
3199          * and we're trying to get hardware block position. It eats
3200          * up performance substantially, but I'm wary of drive firmware.
3201          *
3202          * I think that *logical* block position is probably okay-
3203          * but hardware block position might have to wait for data
3204          * to hit media to be valid. Caveat Emptor.
3205          */
3206
3207         if (hard && (softc->flags & SA_FLAG_TAPE_WRITTEN)) {
3208                 error = sawritefilemarks(periph, 0, 0);
3209                 if (error && error != EACCES)
3210                         return (error);
3211         }
3212
3213         ccb = cam_periph_getccb(periph, 1);
3214         scsi_read_position(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG,
3215             hard, &loc, SSD_FULL_SIZE, SCSIOP_TIMEOUT);
3216         softc->dsreg = MTIO_DSREG_RBSY;
3217         error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats);
3218         softc->dsreg = MTIO_DSREG_REST;
3219         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3220                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, 0);
3221
3222         if (error == 0) {
3223                 if (loc.flags & SA_RPOS_UNCERTAIN) {
3224                         error = EINVAL;         /* nothing is certain */
3225                 } else {
3226                         *blkptr = scsi_4btoul(loc.firstblk);
3227                 }
3228         }
3229
3230         xpt_release_ccb(ccb);
3231         return (error);
3232 }
3233
3234 static int
3235 sasetpos(struct cam_periph *periph, int hard, u_int32_t *blkptr)
3236 {
3237         union ccb *ccb;
3238         struct sa_softc *softc;
3239         int error;
3240
3241         /*
3242          * We used to try and flush any buffered writes here.
3243          * Now we push this onto user applications to either
3244          * flush the pending writes themselves (via a zero count
3245          * WRITE FILEMARKS command) or they can trust their tape
3246          * drive to do this correctly for them.
3247          */
3248
3249         softc = (struct sa_softc *)periph->softc;
3250         ccb = cam_periph_getccb(periph, 1);
3251
3252
3253         scsi_set_position(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG,
3254             hard, *blkptr, SSD_FULL_SIZE, SPACE_TIMEOUT);
3255
3256
3257         softc->dsreg = MTIO_DSREG_POS;
3258         error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats);
3259         softc->dsreg = MTIO_DSREG_REST;
3260         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3261                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, 0);
3262         xpt_release_ccb(ccb);
3263         /*
3264          * Note relative file && block number position as now unknown.
3265          */
3266         softc->fileno = softc->blkno = (daddr_t) -1;
3267         return (error);
3268 }
3269
3270 static int
3271 saretension(struct cam_periph *periph)
3272 {
3273         union ccb *ccb;
3274         struct sa_softc *softc;
3275         int error;
3276
3277         softc = (struct sa_softc *)periph->softc;
3278
3279         ccb = cam_periph_getccb(periph, 1);
3280
3281         /* It is safe to retry this operation */
3282         scsi_load_unload(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, FALSE,
3283             FALSE, TRUE,  TRUE, SSD_FULL_SIZE, ERASE_TIMEOUT);
3284
3285         softc->dsreg = MTIO_DSREG_TEN;
3286         error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats);
3287         softc->dsreg = MTIO_DSREG_REST;
3288
3289         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3290                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE);
3291         xpt_release_ccb(ccb);
3292         if (error == 0)
3293                 softc->fileno = softc->blkno = (daddr_t) 0;
3294         else
3295                 softc->fileno = softc->blkno = (daddr_t) -1;
3296         return (error);
3297 }
3298
3299 static int
3300 sareservereleaseunit(struct cam_periph *periph, int reserve)
3301 {
3302         union ccb *ccb;
3303         struct sa_softc *softc;
3304         int error;
3305
3306         softc = (struct sa_softc *)periph->softc;
3307         ccb = cam_periph_getccb(periph,  1);
3308
3309         /* It is safe to retry this operation */
3310         scsi_reserve_release_unit(&ccb->csio, 2, sadone, MSG_SIMPLE_Q_TAG,
3311             FALSE,  0, SSD_FULL_SIZE,  SCSIOP_TIMEOUT, reserve);
3312         softc->dsreg = MTIO_DSREG_RBSY;
3313         error = cam_periph_runccb(ccb, saerror, 0,
3314             SF_RETRY_UA | SF_NO_PRINT, &softc->device_stats);
3315         softc->dsreg = MTIO_DSREG_REST;
3316         QFRLS(ccb);
3317         xpt_release_ccb(ccb);
3318
3319         /*
3320          * If the error was Illegal Request, then the device doesn't support
3321          * RESERVE/RELEASE. This is not an error.
3322          */
3323         if (error == EINVAL) {
3324                 error = 0;
3325         }
3326
3327         return (error);
3328 }
3329
3330 static int
3331 saloadunload(struct cam_periph *periph, int load)
3332 {
3333         union   ccb *ccb;
3334         struct  sa_softc *softc;
3335         int     error;
3336
3337         softc = (struct sa_softc *)periph->softc;
3338
3339         ccb = cam_periph_getccb(periph, 1);
3340
3341         /* It is safe to retry this operation */
3342         scsi_load_unload(&ccb->csio, 5, sadone, MSG_SIMPLE_Q_TAG, FALSE,
3343             FALSE, FALSE, load, SSD_FULL_SIZE, REWIND_TIMEOUT);
3344
3345         softc->dsreg = (load)? MTIO_DSREG_LD : MTIO_DSREG_UNL;
3346         error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats);
3347         softc->dsreg = MTIO_DSREG_REST;
3348         QFRLS(ccb);
3349         xpt_release_ccb(ccb);
3350
3351         if (error || load == 0)
3352                 softc->fileno = softc->blkno = (daddr_t) -1;
3353         else if (error == 0)
3354                 softc->fileno = softc->blkno = (daddr_t) 0;
3355         return (error);
3356 }
3357
3358 static int
3359 saerase(struct cam_periph *periph, int longerase)
3360 {
3361
3362         union   ccb *ccb;
3363         struct  sa_softc *softc;
3364         int error;
3365
3366         softc = (struct sa_softc *)periph->softc;
3367
3368         ccb = cam_periph_getccb(periph, 1);
3369
3370         scsi_erase(&ccb->csio, 1, sadone, MSG_SIMPLE_Q_TAG, FALSE, longerase,
3371             SSD_FULL_SIZE, ERASE_TIMEOUT);
3372
3373         softc->dsreg = MTIO_DSREG_ZER;
3374         error = cam_periph_runccb(ccb, saerror, 0, 0, &softc->device_stats);
3375         softc->dsreg = MTIO_DSREG_REST;
3376
3377         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
3378                 cam_release_devq(ccb->ccb_h.path, 0, 0, 0, FALSE);
3379         xpt_release_ccb(ccb);
3380         return (error);
3381 }
3382
3383 #endif /* _KERNEL */
3384
3385 /*
3386  * Read tape block limits command.
3387  */
3388 void
3389 scsi_read_block_limits(struct ccb_scsiio *csio, u_int32_t retries,
3390                    void (*cbfcnp)(struct cam_periph *, union ccb *),
3391                    u_int8_t tag_action,
3392                    struct scsi_read_block_limits_data *rlimit_buf,
3393                    u_int8_t sense_len, u_int32_t timeout)
3394 {
3395         struct scsi_read_block_limits *scsi_cmd;
3396
3397         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_IN, tag_action,
3398              (u_int8_t *)rlimit_buf, sizeof(*rlimit_buf), sense_len,
3399              sizeof(*scsi_cmd), timeout);
3400
3401         scsi_cmd = (struct scsi_read_block_limits *)&csio->cdb_io.cdb_bytes;
3402         bzero(scsi_cmd, sizeof(*scsi_cmd));
3403         scsi_cmd->opcode = READ_BLOCK_LIMITS;
3404 }
3405
3406 void
3407 scsi_sa_read_write(struct ccb_scsiio *csio, u_int32_t retries,
3408                    void (*cbfcnp)(struct cam_periph *, union ccb *),
3409                    u_int8_t tag_action, int readop, int sli,
3410                    int fixed, u_int32_t length, u_int8_t *data_ptr,
3411                    u_int32_t dxfer_len, u_int8_t sense_len, u_int32_t timeout)
3412 {
3413         struct scsi_sa_rw *scsi_cmd;
3414
3415         scsi_cmd = (struct scsi_sa_rw *)&csio->cdb_io.cdb_bytes;
3416         scsi_cmd->opcode = readop ? SA_READ : SA_WRITE;
3417         scsi_cmd->sli_fixed = 0;
3418         if (sli && readop)
3419                 scsi_cmd->sli_fixed |= SAR_SLI;
3420         if (fixed)
3421                 scsi_cmd->sli_fixed |= SARW_FIXED;
3422         scsi_ulto3b(length, scsi_cmd->length);
3423         scsi_cmd->control = 0;
3424
3425         cam_fill_csio(csio, retries, cbfcnp, readop ? CAM_DIR_IN : CAM_DIR_OUT,
3426             tag_action, data_ptr, dxfer_len, sense_len,
3427             sizeof(*scsi_cmd), timeout);
3428 }
3429
3430 void
3431 scsi_load_unload(struct ccb_scsiio *csio, u_int32_t retries,
3432                  void (*cbfcnp)(struct cam_periph *, union ccb *),
3433                  u_int8_t tag_action, int immediate, int eot,
3434                  int reten, int load, u_int8_t sense_len,
3435                  u_int32_t timeout)
3436 {
3437         struct scsi_load_unload *scsi_cmd;
3438
3439         scsi_cmd = (struct scsi_load_unload *)&csio->cdb_io.cdb_bytes;
3440         bzero(scsi_cmd, sizeof(*scsi_cmd));
3441         scsi_cmd->opcode = LOAD_UNLOAD;
3442         if (immediate)
3443                 scsi_cmd->immediate = SLU_IMMED;
3444         if (eot)
3445                 scsi_cmd->eot_reten_load |= SLU_EOT;
3446         if (reten)
3447                 scsi_cmd->eot_reten_load |= SLU_RETEN;
3448         if (load)
3449                 scsi_cmd->eot_reten_load |= SLU_LOAD;
3450
3451         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action,
3452             NULL, 0, sense_len, sizeof(*scsi_cmd), timeout);
3453 }
3454
3455 void
3456 scsi_rewind(struct ccb_scsiio *csio, u_int32_t retries,
3457             void (*cbfcnp)(struct cam_periph *, union ccb *),
3458             u_int8_t tag_action, int immediate, u_int8_t sense_len,
3459             u_int32_t timeout)
3460 {
3461         struct scsi_rewind *scsi_cmd;
3462
3463         scsi_cmd = (struct scsi_rewind *)&csio->cdb_io.cdb_bytes;
3464         bzero(scsi_cmd, sizeof(*scsi_cmd));
3465         scsi_cmd->opcode = REWIND;
3466         if (immediate)
3467                 scsi_cmd->immediate = SREW_IMMED;
3468
3469         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
3470             0, sense_len, sizeof(*scsi_cmd), timeout);
3471 }
3472
3473 void
3474 scsi_space(struct ccb_scsiio *csio, u_int32_t retries,
3475            void (*cbfcnp)(struct cam_periph *, union ccb *),
3476            u_int8_t tag_action, scsi_space_code code,
3477            u_int32_t count, u_int8_t sense_len, u_int32_t timeout)
3478 {
3479         struct scsi_space *scsi_cmd;
3480
3481         scsi_cmd = (struct scsi_space *)&csio->cdb_io.cdb_bytes;
3482         scsi_cmd->opcode = SPACE;
3483         scsi_cmd->code = code;
3484         scsi_ulto3b(count, scsi_cmd->count);
3485         scsi_cmd->control = 0;
3486
3487         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
3488             0, sense_len, sizeof(*scsi_cmd), timeout);
3489 }
3490
3491 void
3492 scsi_write_filemarks(struct ccb_scsiio *csio, u_int32_t retries,
3493                      void (*cbfcnp)(struct cam_periph *, union ccb *),
3494                      u_int8_t tag_action, int immediate, int setmark,
3495                      u_int32_t num_marks, u_int8_t sense_len,
3496                      u_int32_t timeout)
3497 {
3498         struct scsi_write_filemarks *scsi_cmd;
3499
3500         scsi_cmd = (struct scsi_write_filemarks *)&csio->cdb_io.cdb_bytes;
3501         bzero(scsi_cmd, sizeof(*scsi_cmd));
3502         scsi_cmd->opcode = WRITE_FILEMARKS;
3503         if (immediate)
3504                 scsi_cmd->byte2 |= SWFMRK_IMMED;
3505         if (setmark)
3506                 scsi_cmd->byte2 |= SWFMRK_WSMK;
3507
3508         scsi_ulto3b(num_marks, scsi_cmd->num_marks);
3509
3510         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
3511             0, sense_len, sizeof(*scsi_cmd), timeout);
3512 }
3513
3514 /*
3515  * The reserve and release unit commands differ only by their opcodes.
3516  */
3517 void
3518 scsi_reserve_release_unit(struct ccb_scsiio *csio, u_int32_t retries,
3519                           void (*cbfcnp)(struct cam_periph *, union ccb *),
3520                           u_int8_t tag_action, int third_party,
3521                           int third_party_id, u_int8_t sense_len,
3522                           u_int32_t timeout, int reserve)
3523 {
3524         struct scsi_reserve_release_unit *scsi_cmd;
3525
3526         scsi_cmd = (struct scsi_reserve_release_unit *)&csio->cdb_io.cdb_bytes;
3527         bzero(scsi_cmd, sizeof(*scsi_cmd));
3528
3529         if (reserve)
3530                 scsi_cmd->opcode = RESERVE_UNIT;
3531         else
3532                 scsi_cmd->opcode = RELEASE_UNIT;
3533
3534         if (third_party) {
3535                 scsi_cmd->lun_thirdparty |= SRRU_3RD_PARTY;
3536                 scsi_cmd->lun_thirdparty |=
3537                         ((third_party_id << SRRU_3RD_SHAMT) & SRRU_3RD_MASK);
3538         }
3539
3540         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
3541             0, sense_len, sizeof(*scsi_cmd), timeout);
3542 }
3543
3544 void
3545 scsi_erase(struct ccb_scsiio *csio, u_int32_t retries,
3546            void (*cbfcnp)(struct cam_periph *, union ccb *),
3547            u_int8_t tag_action, int immediate, int long_erase,
3548            u_int8_t sense_len, u_int32_t timeout)
3549 {
3550         struct scsi_erase *scsi_cmd;
3551
3552         scsi_cmd = (struct scsi_erase *)&csio->cdb_io.cdb_bytes;
3553         bzero(scsi_cmd, sizeof(*scsi_cmd));
3554
3555         scsi_cmd->opcode = ERASE;
3556
3557         if (immediate)
3558                 scsi_cmd->lun_imm_long |= SE_IMMED;
3559
3560         if (long_erase)
3561                 scsi_cmd->lun_imm_long |= SE_LONG;
3562
3563         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action, NULL,
3564             0, sense_len, sizeof(*scsi_cmd), timeout);
3565 }
3566
3567 /*
3568  * Read Tape Position command.
3569  */
3570 void
3571 scsi_read_position(struct ccb_scsiio *csio, u_int32_t retries,
3572                    void (*cbfcnp)(struct cam_periph *, union ccb *),
3573                    u_int8_t tag_action, int hardsoft,
3574                    struct scsi_tape_position_data *sbp,
3575                    u_int8_t sense_len, u_int32_t timeout)
3576 {
3577         struct scsi_tape_read_position *scmd;
3578
3579         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_IN, tag_action,
3580             (u_int8_t *)sbp, sizeof (*sbp), sense_len, sizeof(*scmd), timeout);
3581         scmd = (struct scsi_tape_read_position *)&csio->cdb_io.cdb_bytes;
3582         bzero(scmd, sizeof(*scmd));
3583         scmd->opcode = READ_POSITION;
3584         scmd->byte1 = hardsoft;
3585 }
3586
3587 /*
3588  * Set Tape Position command.
3589  */
3590 void
3591 scsi_set_position(struct ccb_scsiio *csio, u_int32_t retries,
3592                    void (*cbfcnp)(struct cam_periph *, union ccb *),
3593                    u_int8_t tag_action, int hardsoft, u_int32_t blkno,
3594                    u_int8_t sense_len, u_int32_t timeout)
3595 {
3596         struct scsi_tape_locate *scmd;
3597
3598         cam_fill_csio(csio, retries, cbfcnp, CAM_DIR_NONE, tag_action,
3599             (u_int8_t *)NULL, 0, sense_len, sizeof(*scmd), timeout);
3600         scmd = (struct scsi_tape_locate *)&csio->cdb_io.cdb_bytes;
3601         bzero(scmd, sizeof(*scmd));
3602         scmd->opcode = LOCATE;
3603         if (hardsoft)
3604                 scmd->byte1 |= SA_SPOS_BT;
3605         scsi_ulto4b(blkno, scmd->blkaddr);
3606 }