sys/cam/scsi/scsi_ch.c

   1 /*-
   2  * Copyright (c) 1997 Justin T. Gibbs.
   3  * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry.
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions, and the following disclaimer,
  11  *    without modification, immediately at the beginning of the file.
  12  * 2. The name of the author may not be used to endorse or promote products
  13  *    derived from this software without specific prior written permission.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  18  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  19  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  25  * SUCH DAMAGE.
  26  */
  27
  28 /*
  29  * Derived from the NetBSD SCSI changer driver.
  30  *
  31  *      $NetBSD: ch.c,v 1.32 1998/01/12 09:49:12 thorpej Exp $
  32  *
  33  */
  34 /*-
  35  * Copyright (c) 1996, 1997 Jason R. Thorpe <thorpej@and.com>
  36  * All rights reserved.
  37  *
  38  * Partially based on an autochanger driver written by Stefan Grefen
  39  * and on an autochanger driver written by the Systems Programming Group
  40  * at the University of Utah Computer Science Department.
  41  *
  42  * Redistribution and use in source and binary forms, with or without
  43  * modification, are permitted provided that the following conditions
  44  * are met:
  45  * 1. Redistributions of source code must retain the above copyright
  46  *    notice, this list of conditions and the following disclaimer.
  47  * 2. Redistributions in binary form must reproduce the above copyright
  48  *    notice, this list of conditions and the following disclaimer in the
  49  *    documentation and/or other materials provided with the distribution.
  50  * 3. All advertising materials mentioning features or use of this software
  51  *    must display the following acknowledgements:
  52  *      This product includes software developed by Jason R. Thorpe
  53  *      for And Communications, http://www.and.com/
  54  * 4. The name of the author may not be used to endorse or promote products
  55  *    derived from this software without specific prior written permission.
  56  *
  57  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  58  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  59  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  60  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  61  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  62  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  63  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  64  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  65  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  66  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  67  * SUCH DAMAGE.
  68  */
  69
  70 #include <sys/cdefs.h>
  71 __FBSDID("$FreeBSD$");
  72
  73 #include <sys/param.h>
  74 #include <sys/queue.h>
  75 #include <sys/systm.h>
  76 #include <sys/kernel.h>
  77 #include <sys/types.h>
  78 #include <sys/malloc.h>
  79 #include <sys/fcntl.h>
  80 #include <sys/conf.h>
  81 #include <sys/chio.h>
  82 #include <sys/errno.h>
  83 #include <sys/devicestat.h>
  84
  85 #include <cam/cam.h>
  86 #include <cam/cam_ccb.h>
  87 #include <cam/cam_periph.h>
  88 #include <cam/cam_xpt_periph.h>
  89 #include <cam/cam_debug.h>
  90
  91 #include <cam/scsi/scsi_all.h>
  92 #include <cam/scsi/scsi_message.h>
  93 #include <cam/scsi/scsi_ch.h>
  94
  95 /*
  96  * Timeout definitions for various changer related commands.  They may
  97  * be too short for some devices (especially the timeout for INITIALIZE
  98  * ELEMENT STATUS).
  99  */
 100
 101 static const u_int32_t  CH_TIMEOUT_MODE_SENSE                = 6000;
 102 static const u_int32_t  CH_TIMEOUT_MOVE_MEDIUM               = 100000;
 103 static const u_int32_t  CH_TIMEOUT_EXCHANGE_MEDIUM           = 100000;
 104 static const u_int32_t  CH_TIMEOUT_POSITION_TO_ELEMENT       = 100000;
 105 static const u_int32_t  CH_TIMEOUT_READ_ELEMENT_STATUS       = 10000;
 106 static const u_int32_t  CH_TIMEOUT_SEND_VOLTAG               = 10000;
 107 static const u_int32_t  CH_TIMEOUT_INITIALIZE_ELEMENT_STATUS = 500000;
 108
 109 typedef enum {
 110         CH_FLAG_INVALID         = 0x001,
 111         CH_FLAG_OPEN            = 0x002
 112 } ch_flags;
 113
 114 typedef enum {
 115         CH_STATE_PROBE,
 116         CH_STATE_NORMAL
 117 } ch_state;
 118
 119 typedef enum {
 120         CH_CCB_PROBE,
 121         CH_CCB_WAITING
 122 } ch_ccb_types;
 123
 124 typedef enum {
 125         CH_Q_NONE       = 0x00,
 126         CH_Q_NO_DBD     = 0x01
 127 } ch_quirks;
 128
 129 #define ccb_state       ppriv_field0
 130 #define ccb_bp          ppriv_ptr1
 131
 132 struct scsi_mode_sense_data {
 133         struct scsi_mode_header_6 header;
 134         struct scsi_mode_blk_desc blk_desc;
 135         union {
 136                 struct page_element_address_assignment ea;
 137                 struct page_transport_geometry_parameters tg;
 138                 struct page_device_capabilities cap;
 139         } pages;
 140 };
 141
 142 struct ch_softc {
 143         ch_flags        flags;
 144         ch_state        state;
 145         ch_quirks       quirks;
 146         union ccb       saved_ccb;
 147         struct devstat  *device_stats;
 148         struct cdev *dev;
 149
 150         int             sc_picker;      /* current picker */
 151
 152         /*
 153          * The following information is obtained from the
 154          * element address assignment page.
 155          */
 156         int             sc_firsts[CHET_MAX + 1];        /* firsts */
 157         int             sc_counts[CHET_MAX + 1];        /* counts */
 158
 159         /*
 160          * The following mask defines the legal combinations
 161          * of elements for the MOVE MEDIUM command.
 162          */
 163         u_int8_t        sc_movemask[CHET_MAX + 1];
 164
 165         /*
 166          * As above, but for EXCHANGE MEDIUM.
 167          */
 168         u_int8_t        sc_exchangemask[CHET_MAX + 1];
 169
 170         /*
 171          * Quirks; see below.  XXX KDM not implemented yet
 172          */
 173         int             sc_settledelay; /* delay for settle */
 174 };
 175
 176 static  d_open_t        chopen;
 177 static  d_close_t       chclose;
 178 static  d_ioctl_t       chioctl;
 179 static  periph_init_t   chinit;
 180 static  periph_ctor_t   chregister;
 181 static  periph_oninv_t  choninvalidate;
 182 static  periph_dtor_t   chcleanup;
 183 static  periph_start_t  chstart;
 184 static  void            chasync(void *callback_arg, u_int32_t code,
 185                                 struct cam_path *path, void *arg);
 186 static  void            chdone(struct cam_periph *periph,
 187                                union ccb *done_ccb);
 188 static  int             cherror(union ccb *ccb, u_int32_t cam_flags,
 189                                 u_int32_t sense_flags);
 190 static  int             chmove(struct cam_periph *periph,
 191                                struct changer_move *cm);
 192 static  int             chexchange(struct cam_periph *periph,
 193                                    struct changer_exchange *ce);
 194 static  int             chposition(struct cam_periph *periph,
 195                                    struct changer_position *cp);
 196 static  int             chgetelemstatus(struct cam_periph *periph,
 197                                 struct changer_element_status_request *csr);
 198 static  int             chsetvoltag(struct cam_periph *periph,
 199                                     struct changer_set_voltag_request *csvr);
 200 static  int             chielem(struct cam_periph *periph,
 201                                 unsigned int timeout);
 202 static  int             chgetparams(struct cam_periph *periph);
 203
 204 static struct periph_driver chdriver =
 205 {
 206         chinit, "ch",
 207         TAILQ_HEAD_INITIALIZER(chdriver.units), /* generation */ 0
 208 };
 209
 210 PERIPHDRIVER_DECLARE(ch, chdriver);
 211
 212 static struct cdevsw ch_cdevsw = {
 213         .d_version =    D_VERSION,
 214         .d_flags =      0,
 215         .d_open =       chopen,
 216         .d_close =      chclose,
 217         .d_ioctl =      chioctl,
 218         .d_name =       "ch",
 219 };
 220
 221 MALLOC_DEFINE(M_SCSICH, "scsi_ch", "scsi_ch buffers");
 222
 223 static void
 224 chinit(void)
 225 {
 226         cam_status status;
 227
 228         /*
 229          * Install a global async callback.  This callback will
 230          * receive async callbacks like "new device found".
 231          */
 232         status = xpt_register_async(AC_FOUND_DEVICE, chasync, NULL, NULL);
 233
 234         if (status != CAM_REQ_CMP) {
 235                 printf("ch: Failed to attach master async callback "
 236                        "due to status 0x%x!\n", status);
 237         }
 238 }
 239
 240 static void
 241 choninvalidate(struct cam_periph *periph)
 242 {
 243         struct ch_softc *softc;
 244
 245         softc = (struct ch_softc *)periph->softc;
 246
 247         /*
 248          * De-register any async callbacks.
 249          */
 250         xpt_register_async(0, chasync, periph, periph->path);
 251
 252         softc->flags |= CH_FLAG_INVALID;
 253
 254         xpt_print(periph->path, "lost device\n");
 255
 256 }
 257
 258 static void
 259 chcleanup(struct cam_periph *periph)
 260 {
 261         struct ch_softc *softc;
 262
 263         softc = (struct ch_softc *)periph->softc;
 264
 265         xpt_print(periph->path, "removing device entry\n");
 266         devstat_remove_entry(softc->device_stats);
 267         cam_periph_unlock(periph);
 268         destroy_dev(softc->dev);
 269         cam_periph_lock(periph);
 270         free(softc, M_DEVBUF);
 271 }
 272
 273 static void
 274 chasync(void *callback_arg, u_int32_t code, struct cam_path *path, void *arg)
 275 {
 276         struct cam_periph *periph;
 277
 278         periph = (struct cam_periph *)callback_arg;
 279
 280         switch(code) {
 281         case AC_FOUND_DEVICE:
 282         {
 283                 struct ccb_getdev *cgd;
 284                 cam_status status;
 285
 286                 cgd = (struct ccb_getdev *)arg;
 287                 if (cgd == NULL)
 288                         break;
 289
 290                 if (SID_TYPE(&cgd->inq_data)!= T_CHANGER)
 291                         break;
 292
 293                 /*
 294                  * Allocate a peripheral instance for
 295                  * this device and start the probe
 296                  * process.
 297                  */
 298                 status = cam_periph_alloc(chregister, choninvalidate,
 299                                           chcleanup, chstart, "ch",
 300                                           CAM_PERIPH_BIO, cgd->ccb_h.path,
 301                                           chasync, AC_FOUND_DEVICE, cgd);
 302
 303                 if (status != CAM_REQ_CMP
 304                  && status != CAM_REQ_INPROG)
 305                         printf("chasync: Unable to probe new device "
 306                                "due to status 0x%x\n", status);
 307
 308                 break;
 309
 310         }
 311         default:
 312                 cam_periph_async(periph, code, path, arg);
 313                 break;
 314         }
 315 }
 316
 317 static cam_status
 318 chregister(struct cam_periph *periph, void *arg)
 319 {
 320         struct ch_softc *softc;
 321         struct ccb_getdev *cgd;
 322
 323         cgd = (struct ccb_getdev *)arg;
 324         if (periph == NULL) {
 325                 printf("chregister: periph was NULL!!\n");
 326                 return(CAM_REQ_CMP_ERR);
 327         }
 328
 329         if (cgd == NULL) {
 330                 printf("chregister: no getdev CCB, can't register device\n");
 331                 return(CAM_REQ_CMP_ERR);
 332         }
 333
 334         softc = (struct ch_softc *)malloc(sizeof(*softc),M_DEVBUF,M_NOWAIT);
 335
 336         if (softc == NULL) {
 337                 printf("chregister: Unable to probe new device. "
 338                        "Unable to allocate softc\n");
 339                 return(CAM_REQ_CMP_ERR);
 340         }
 341
 342         bzero(softc, sizeof(*softc));
 343         softc->state = CH_STATE_PROBE;
 344         periph->softc = softc;
 345         softc->quirks = CH_Q_NONE;
 346
 347         /*
 348          * Changers don't have a blocksize, and obviously don't support
 349          * tagged queueing.
 350          */
 351         cam_periph_unlock(periph);
 352         softc->device_stats = devstat_new_entry("ch",
 353                           periph->unit_number, 0,
 354                           DEVSTAT_NO_BLOCKSIZE | DEVSTAT_NO_ORDERED_TAGS,
 355                           SID_TYPE(&cgd->inq_data)| DEVSTAT_TYPE_IF_SCSI,
 356                           DEVSTAT_PRIORITY_OTHER);
 357
 358         /* Register the device */
 359         softc->dev = make_dev(&ch_cdevsw, periph->unit_number, UID_ROOT,
 360                               GID_OPERATOR, 0600, "%s%d", periph->periph_name,
 361                               periph->unit_number);
 362         cam_periph_lock(periph);
 363         softc->dev->si_drv1 = periph;
 364
 365         /*
 366          * Add an async callback so that we get
 367          * notified if this device goes away.
 368          */
 369         xpt_register_async(AC_LOST_DEVICE, chasync, periph, periph->path);
 370
 371         /*
 372          * Lock this periph until we are setup.
 373          * This first call can't block
 374          */
 375         (void)cam_periph_hold(periph, PRIBIO);
 376         xpt_schedule(periph, /*priority*/5);
 377
 378         return(CAM_REQ_CMP);
 379 }
 380
 381 static int
 382 chopen(struct cdev *dev, int flags, int fmt, struct thread *td)
 383 {
 384         struct cam_periph *periph;
 385         struct ch_softc *softc;
 386         int error;
 387
 388         periph = (struct cam_periph *)dev->si_drv1;
 389         if (cam_periph_acquire(periph) != CAM_REQ_CMP)
 390                 return (ENXIO);
 391
 392         softc = (struct ch_softc *)periph->softc;
 393
 394         cam_periph_lock(periph);
 395
 396         if (softc->flags & CH_FLAG_INVALID) {
 397                 cam_periph_unlock(periph);
 398                 cam_periph_release(periph);
 399                 return(ENXIO);
 400         }
 401
 402         if ((softc->flags & CH_FLAG_OPEN) == 0)
 403                 softc->flags |= CH_FLAG_OPEN;
 404         else
 405                 cam_periph_release(periph);
 406
 407         if ((error = cam_periph_hold(periph, PRIBIO | PCATCH)) != 0) {
 408                 cam_periph_unlock(periph);
 409                 cam_periph_release(periph);
 410                 return (error);
 411         }
 412
 413         /*
 414          * Load information about this changer device into the softc.
 415          */
 416         if ((error = chgetparams(periph)) != 0) {
 417                 softc->flags &= ~CH_FLAG_OPEN;
 418                 cam_periph_unlock(periph);
 419                 cam_periph_release(periph);
 420                 return(error);
 421         }
 422
 423         cam_periph_unhold(periph);
 424         cam_periph_unlock(periph);
 425
 426         return(error);
 427 }
 428
 429 static int
 430 chclose(struct cdev *dev, int flag, int fmt, struct thread *td)
 431 {
 432         struct  cam_periph *periph;
 433         struct  ch_softc *softc;
 434         int     error;
 435
 436         error = 0;
 437
 438         periph = (struct cam_periph *)dev->si_drv1;
 439         if (periph == NULL)
 440                 return(ENXIO);
 441
 442         softc = (struct ch_softc *)periph->softc;
 443
 444         cam_periph_lock(periph);
 445
 446         softc->flags &= ~CH_FLAG_OPEN;
 447
 448         cam_periph_unlock(periph);
 449         cam_periph_release(periph);
 450
 451         return(0);
 452 }
 453
 454 static void
 455 chstart(struct cam_periph *periph, union ccb *start_ccb)
 456 {
 457         struct ch_softc *softc;
 458
 459         softc = (struct ch_softc *)periph->softc;
 460
 461         switch (softc->state) {
 462         case CH_STATE_NORMAL:
 463         {
 464                 if (periph->immediate_priority <= periph->pinfo.priority){
 465                         start_ccb->ccb_h.ccb_state = CH_CCB_WAITING;
 466
 467                         SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
 468                                           periph_links.sle);
 469                         periph->immediate_priority = CAM_PRIORITY_NONE;
 470                         wakeup(&periph->ccb_list);
 471                 }
 472                 break;
 473         }
 474         case CH_STATE_PROBE:
 475         {
 476                 int mode_buffer_len;
 477                 void *mode_buffer;
 478
 479                 /*
 480                  * Include the block descriptor when calculating the mode
 481                  * buffer length,
 482                  */
 483                 mode_buffer_len = sizeof(struct scsi_mode_header_6) +
 484                                   sizeof(struct scsi_mode_blk_desc) +
 485                                  sizeof(struct page_element_address_assignment);
 486
 487                 mode_buffer = malloc(mode_buffer_len, M_SCSICH, M_NOWAIT);
 488
 489                 if (mode_buffer == NULL) {
 490                         printf("chstart: couldn't malloc mode sense data\n");
 491                         break;
 492                 }
 493                 bzero(mode_buffer, mode_buffer_len);
 494
 495                 /*
 496                  * Get the element address assignment page.
 497                  */
 498                 scsi_mode_sense(&start_ccb->csio,
 499                                 /* retries */ 1,
 500                                 /* cbfcnp */ chdone,
 501                                 /* tag_action */ MSG_SIMPLE_Q_TAG,
 502                                 /* dbd */ (softc->quirks & CH_Q_NO_DBD) ?
 503                                         FALSE : TRUE,
 504                                 /* page_code */ SMS_PAGE_CTRL_CURRENT,
 505                                 /* page */ CH_ELEMENT_ADDR_ASSIGN_PAGE,
 506                                 /* param_buf */ (u_int8_t *)mode_buffer,
 507                                 /* param_len */ mode_buffer_len,
 508                                 /* sense_len */ SSD_FULL_SIZE,
 509                                 /* timeout */ CH_TIMEOUT_MODE_SENSE);
 510
 511                 start_ccb->ccb_h.ccb_bp = NULL;
 512                 start_ccb->ccb_h.ccb_state = CH_CCB_PROBE;
 513                 xpt_action(start_ccb);
 514                 break;
 515         }
 516         }
 517 }
 518
 519 static void
 520 chdone(struct cam_periph *periph, union ccb *done_ccb)
 521 {
 522         struct ch_softc *softc;
 523         struct ccb_scsiio *csio;
 524
 525         softc = (struct ch_softc *)periph->softc;
 526         csio = &done_ccb->csio;
 527
 528         switch(done_ccb->ccb_h.ccb_state) {
 529         case CH_CCB_PROBE:
 530         {
 531                 struct scsi_mode_header_6 *mode_header;
 532                 struct page_element_address_assignment *ea;
 533                 char announce_buf[80];
 534
 535
 536                 mode_header = (struct scsi_mode_header_6 *)csio->data_ptr;
 537
 538                 ea = (struct page_element_address_assignment *)
 539                         find_mode_page_6(mode_header);
 540
 541                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP){
 542
 543                         softc->sc_firsts[CHET_MT] = scsi_2btoul(ea->mtea);
 544                         softc->sc_counts[CHET_MT] = scsi_2btoul(ea->nmte);
 545                         softc->sc_firsts[CHET_ST] = scsi_2btoul(ea->fsea);
 546                         softc->sc_counts[CHET_ST] = scsi_2btoul(ea->nse);
 547                         softc->sc_firsts[CHET_IE] = scsi_2btoul(ea->fieea);
 548                         softc->sc_counts[CHET_IE] = scsi_2btoul(ea->niee);
 549                         softc->sc_firsts[CHET_DT] = scsi_2btoul(ea->fdtea);
 550                         softc->sc_counts[CHET_DT] = scsi_2btoul(ea->ndte);
 551                         softc->sc_picker = softc->sc_firsts[CHET_MT];
 552
 553 #define PLURAL(c)       (c) == 1 ? "" : "s"
 554                         snprintf(announce_buf, sizeof(announce_buf),
 555                                 "%d slot%s, %d drive%s, "
 556                                 "%d picker%s, %d portal%s",
 557                                 softc->sc_counts[CHET_ST],
 558                                 PLURAL(softc->sc_counts[CHET_ST]),
 559                                 softc->sc_counts[CHET_DT],
 560                                 PLURAL(softc->sc_counts[CHET_DT]),
 561                                 softc->sc_counts[CHET_MT],
 562                                 PLURAL(softc->sc_counts[CHET_MT]),
 563                                 softc->sc_counts[CHET_IE],
 564                                 PLURAL(softc->sc_counts[CHET_IE]));
 565 #undef PLURAL
 566                 } else {
 567                         int error;
 568
 569                         error = cherror(done_ccb, CAM_RETRY_SELTO,
 570                                         SF_RETRY_UA | SF_NO_PRINT);
 571                         /*
 572                          * Retry any UNIT ATTENTION type errors.  They
 573                          * are expected at boot.
 574                          */
 575                         if (error == ERESTART) {
 576                                 /*
 577                                  * A retry was scheuled, so
 578                                  * just return.
 579                                  */
 580                                 return;
 581                         } else if (error != 0) {
 582                                 int retry_scheduled;
 583                                 struct scsi_mode_sense_6 *sms;
 584
 585                                 sms = (struct scsi_mode_sense_6 *)
 586                                         done_ccb->csio.cdb_io.cdb_bytes;
 587
 588                                 /*
 589                                  * Check to see if block descriptors were
 590                                  * disabled.  Some devices don't like that.
 591                                  * We're taking advantage of the fact that
 592                                  * the first few bytes of the 6 and 10 byte
 593                                  * mode sense commands are the same.  If
 594                                  * block descriptors were disabled, enable
 595                                  * them and re-send the command.
 596                                  */
 597                                 if (sms->byte2 & SMS_DBD) {
 598                                         sms->byte2 &= ~SMS_DBD;
 599                                         xpt_action(done_ccb);
 600                                         softc->quirks |= CH_Q_NO_DBD;
 601                                         retry_scheduled = 1;
 602                                 } else
 603                                         retry_scheduled = 0;
 604
 605                                 /* Don't wedge this device's queue */
 606                                 cam_release_devq(done_ccb->ccb_h.path,
 607                                                  /*relsim_flags*/0,
 608                                                  /*reduction*/0,
 609                                                  /*timeout*/0,
 610                                                  /*getcount_only*/0);
 611
 612                                 if (retry_scheduled)
 613                                         return;
 614
 615                                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK)
 616                                     == CAM_SCSI_STATUS_ERROR)
 617                                         scsi_sense_print(&done_ccb->csio);
 618                                 else {
 619                                         xpt_print(periph->path,
 620                                             "got CAM status %#x\n",
 621                                             done_ccb->ccb_h.status);
 622                                 }
 623                                 xpt_print(periph->path, "fatal error, failed "
 624                                     "to attach to device\n");
 625
 626                                 cam_periph_invalidate(periph);
 627
 628                                 announce_buf[0] = '\0';
 629                         }
 630                 }
 631                 if (announce_buf[0] != '\0')
 632                         xpt_announce_periph(periph, announce_buf);
 633                 softc->state = CH_STATE_NORMAL;
 634                 free(mode_header, M_SCSICH);
 635                 /*
 636                  * Since our peripheral may be invalidated by an error
 637                  * above or an external event, we must release our CCB
 638                  * before releasing the probe lock on the peripheral.
 639                  * The peripheral will only go away once the last lock
 640                  * is removed, and we need it around for the CCB release
 641                  * operation.
 642                  */
 643                 xpt_release_ccb(done_ccb);
 644                 cam_periph_unhold(periph);
 645                 return;
 646         }
 647         case CH_CCB_WAITING:
 648         {
 649                 /* Caller will release the CCB */
 650                 wakeup(&done_ccb->ccb_h.cbfcnp);
 651                 return;
 652         }
 653         default:
 654                 break;
 655         }
 656         xpt_release_ccb(done_ccb);
 657 }
 658
 659 static int
 660 cherror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
 661 {
 662         struct ch_softc *softc;
 663         struct cam_periph *periph;
 664
 665         periph = xpt_path_periph(ccb->ccb_h.path);
 666         softc = (struct ch_softc *)periph->softc;
 667
 668         return (cam_periph_error(ccb, cam_flags, sense_flags,
 669                                  &softc->saved_ccb));
 670 }
 671
 672 static int
 673 chioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 674 {
 675         struct cam_periph *periph;
 676         struct ch_softc *softc;
 677         int error;
 678
 679         periph = (struct cam_periph *)dev->si_drv1;
 680         if (periph == NULL)
 681                 return(ENXIO);
 682
 683         cam_periph_lock(periph);
 684         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering chioctl\n"));
 685
 686         softc = (struct ch_softc *)periph->softc;
 687
 688         error = 0;
 689
 690         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
 691                   ("trying to do ioctl %#lx\n", cmd));
 692
 693         /*
 694          * If this command can change the device's state, we must
 695          * have the device open for writing.
 696          */
 697         switch (cmd) {
 698         case CHIOGPICKER:
 699         case CHIOGPARAMS:
 700         case CHIOGSTATUS:
 701                 break;
 702
 703         default:
 704                 if ((flag & FWRITE) == 0) {
 705                         cam_periph_unlock(periph);
 706                         return (EBADF);
 707                 }
 708         }
 709
 710         switch (cmd) {
 711         case CHIOMOVE:
 712                 error = chmove(periph, (struct changer_move *)addr);
 713                 break;
 714
 715         case CHIOEXCHANGE:
 716                 error = chexchange(periph, (struct changer_exchange *)addr);
 717                 break;
 718
 719         case CHIOPOSITION:
 720                 error = chposition(periph, (struct changer_position *)addr);
 721                 break;
 722
 723         case CHIOGPICKER:
 724                 *(int *)addr = softc->sc_picker - softc->sc_firsts[CHET_MT];
 725                 break;
 726
 727         case CHIOSPICKER:
 728         {
 729                 int new_picker = *(int *)addr;
 730
 731                 if (new_picker > (softc->sc_counts[CHET_MT] - 1)) {
 732                         error = EINVAL;
 733                         break;
 734                 }
 735                 softc->sc_picker = softc->sc_firsts[CHET_MT] + new_picker;
 736                 break;
 737         }
 738         case CHIOGPARAMS:
 739         {
 740                 struct changer_params *cp = (struct changer_params *)addr;
 741
 742                 cp->cp_npickers = softc->sc_counts[CHET_MT];
 743                 cp->cp_nslots = softc->sc_counts[CHET_ST];
 744                 cp->cp_nportals = softc->sc_counts[CHET_IE];
 745                 cp->cp_ndrives = softc->sc_counts[CHET_DT];
 746                 break;
 747         }
 748         case CHIOIELEM:
 749                 error = chielem(periph, *(unsigned int *)addr);
 750                 break;
 751
 752         case CHIOGSTATUS:
 753         {
 754                 error = chgetelemstatus(periph,
 755                                (struct changer_element_status_request *) addr);
 756                 break;
 757         }
 758
 759         case CHIOSETVOLTAG:
 760         {
 761                 error = chsetvoltag(periph,
 762                                     (struct changer_set_voltag_request *) addr);
 763                 break;
 764         }
 765
 766         /* Implement prevent/allow? */
 767
 768         default:
 769                 error = cam_periph_ioctl(periph, cmd, addr, cherror);
 770                 break;
 771         }
 772
 773         cam_periph_unlock(periph);
 774         return (error);
 775 }
 776
 777 static int
 778 chmove(struct cam_periph *periph, struct changer_move *cm)
 779 {
 780         struct ch_softc *softc;
 781         u_int16_t fromelem, toelem;
 782         union ccb *ccb;
 783         int error;
 784
 785         error = 0;
 786         softc = (struct ch_softc *)periph->softc;
 787
 788         /*
 789          * Check arguments.
 790          */
 791         if ((cm->cm_fromtype > CHET_DT) || (cm->cm_totype > CHET_DT))
 792                 return (EINVAL);
 793         if ((cm->cm_fromunit > (softc->sc_counts[cm->cm_fromtype] - 1)) ||
 794             (cm->cm_tounit > (softc->sc_counts[cm->cm_totype] - 1)))
 795                 return (ENODEV);
 796
 797         /*
 798          * Check the request against the changer's capabilities.
 799          */
 800         if ((softc->sc_movemask[cm->cm_fromtype] & (1 << cm->cm_totype)) == 0)
 801                 return (ENODEV);
 802
 803         /*
 804          * Calculate the source and destination elements.
 805          */
 806         fromelem = softc->sc_firsts[cm->cm_fromtype] + cm->cm_fromunit;
 807         toelem = softc->sc_firsts[cm->cm_totype] + cm->cm_tounit;
 808
 809         ccb = cam_periph_getccb(periph, /*priority*/ 1);
 810
 811         scsi_move_medium(&ccb->csio,
 812                          /* retries */ 1,
 813                          /* cbfcnp */ chdone,
 814                          /* tag_action */ MSG_SIMPLE_Q_TAG,
 815                          /* tea */ softc->sc_picker,
 816                          /* src */ fromelem,
 817                          /* dst */ toelem,
 818                          /* invert */ (cm->cm_flags & CM_INVERT) ? TRUE : FALSE,
 819                          /* sense_len */ SSD_FULL_SIZE,
 820                          /* timeout */ CH_TIMEOUT_MOVE_MEDIUM);
 821
 822         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/CAM_RETRY_SELTO,
 823                                   /*sense_flags*/ SF_RETRY_UA,
 824                                   softc->device_stats);
 825
 826         xpt_release_ccb(ccb);
 827
 828         return(error);
 829 }
 830
 831 static int
 832 chexchange(struct cam_periph *periph, struct changer_exchange *ce)
 833 {
 834         struct ch_softc *softc;
 835         u_int16_t src, dst1, dst2;
 836         union ccb *ccb;
 837         int error;
 838
 839         error = 0;
 840         softc = (struct ch_softc *)periph->softc;
 841         /*
 842          * Check arguments.
 843          */
 844         if ((ce->ce_srctype > CHET_DT) || (ce->ce_fdsttype > CHET_DT) ||
 845             (ce->ce_sdsttype > CHET_DT))
 846                 return (EINVAL);
 847         if ((ce->ce_srcunit > (softc->sc_counts[ce->ce_srctype] - 1)) ||
 848             (ce->ce_fdstunit > (softc->sc_counts[ce->ce_fdsttype] - 1)) ||
 849             (ce->ce_sdstunit > (softc->sc_counts[ce->ce_sdsttype] - 1)))
 850                 return (ENODEV);
 851
 852         /*
 853          * Check the request against the changer's capabilities.
 854          */
 855         if (((softc->sc_exchangemask[ce->ce_srctype] &
 856              (1 << ce->ce_fdsttype)) == 0) ||
 857             ((softc->sc_exchangemask[ce->ce_fdsttype] &
 858              (1 << ce->ce_sdsttype)) == 0))
 859                 return (ENODEV);
 860
 861         /*
 862          * Calculate the source and destination elements.
 863          */
 864         src = softc->sc_firsts[ce->ce_srctype] + ce->ce_srcunit;
 865         dst1 = softc->sc_firsts[ce->ce_fdsttype] + ce->ce_fdstunit;
 866         dst2 = softc->sc_firsts[ce->ce_sdsttype] + ce->ce_sdstunit;
 867
 868         ccb = cam_periph_getccb(periph, /*priority*/ 1);
 869
 870         scsi_exchange_medium(&ccb->csio,
 871                              /* retries */ 1,
 872                              /* cbfcnp */ chdone,
 873                              /* tag_action */ MSG_SIMPLE_Q_TAG,
 874                              /* tea */ softc->sc_picker,
 875                              /* src */ src,
 876                              /* dst1 */ dst1,
 877                              /* dst2 */ dst2,
 878                              /* invert1 */ (ce->ce_flags & CE_INVERT1) ?
 879                                            TRUE : FALSE,
 880                              /* invert2 */ (ce->ce_flags & CE_INVERT2) ?
 881                                            TRUE : FALSE,
 882                              /* sense_len */ SSD_FULL_SIZE,
 883                              /* timeout */ CH_TIMEOUT_EXCHANGE_MEDIUM);
 884
 885         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/CAM_RETRY_SELTO,
 886                                   /*sense_flags*/ SF_RETRY_UA,
 887                                   softc->device_stats);
 888
 889         xpt_release_ccb(ccb);
 890
 891         return(error);
 892 }
 893
 894 static int
 895 chposition(struct cam_periph *periph, struct changer_position *cp)
 896 {
 897         struct ch_softc *softc;
 898         u_int16_t dst;
 899         union ccb *ccb;
 900         int error;
 901
 902         error = 0;
 903         softc = (struct ch_softc *)periph->softc;
 904
 905         /*
 906          * Check arguments.
 907          */
 908         if (cp->cp_type > CHET_DT)
 909                 return (EINVAL);
 910         if (cp->cp_unit > (softc->sc_counts[cp->cp_type] - 1))
 911                 return (ENODEV);
 912
 913         /*
 914          * Calculate the destination element.
 915          */
 916         dst = softc->sc_firsts[cp->cp_type] + cp->cp_unit;
 917
 918         ccb = cam_periph_getccb(periph, /*priority*/ 1);
 919
 920         scsi_position_to_element(&ccb->csio,
 921                                  /* retries */ 1,
 922                                  /* cbfcnp */ chdone,
 923                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
 924                                  /* tea */ softc->sc_picker,
 925                                  /* dst */ dst,
 926                                  /* invert */ (cp->cp_flags & CP_INVERT) ?
 927                                               TRUE : FALSE,
 928                                  /* sense_len */ SSD_FULL_SIZE,
 929                                  /* timeout */ CH_TIMEOUT_POSITION_TO_ELEMENT);
 930
 931         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
 932                                   /*sense_flags*/ SF_RETRY_UA,
 933                                   softc->device_stats);
 934
 935         xpt_release_ccb(ccb);
 936
 937         return(error);
 938 }
 939
 940 /*
 941  * Copy a volume tag to a volume_tag struct, converting SCSI byte order
 942  * to host native byte order in the volume serial number.  The volume
 943  * label as returned by the changer is transferred to user mode as
 944  * nul-terminated string.  Volume labels are truncated at the first
 945  * space, as suggested by SCSI-2.
 946  */
 947 static  void
 948 copy_voltag(struct changer_voltag *uvoltag, struct volume_tag *voltag)
 949 {
 950         int i;
 951         for (i=0; i<CH_VOLTAG_MAXLEN; i++) {
 952                 char c = voltag->vif[i];
 953                 if (c && c != ' ')
 954                         uvoltag->cv_volid[i] = c;
 955                 else
 956                         break;
 957         }
 958         uvoltag->cv_serial = scsi_2btoul(voltag->vsn);
 959 }
 960
 961 /*
 962  * Copy an an element status descriptor to a user-mode
 963  * changer_element_status structure.
 964  */
 965
 966 static  void
 967 copy_element_status(struct ch_softc *softc,
 968                     u_int16_t flags,
 969                     struct read_element_status_descriptor *desc,
 970                     struct changer_element_status *ces)
 971 {
 972         u_int16_t eaddr = scsi_2btoul(desc->eaddr);
 973         u_int16_t et;
 974
 975         ces->ces_int_addr = eaddr;
 976         /* set up logical address in element status */
 977         for (et = CHET_MT; et <= CHET_DT; et++) {
 978                 if ((softc->sc_firsts[et] <= eaddr)
 979                     && ((softc->sc_firsts[et] + softc->sc_counts[et])
 980                         > eaddr)) {
 981                         ces->ces_addr = eaddr - softc->sc_firsts[et];
 982                         ces->ces_type = et;
 983                         break;
 984                 }
 985         }
 986
 987         ces->ces_flags = desc->flags1;
 988
 989         ces->ces_sensecode = desc->sense_code;
 990         ces->ces_sensequal = desc->sense_qual;
 991
 992         if (desc->flags2 & READ_ELEMENT_STATUS_INVERT)
 993                 ces->ces_flags |= CES_INVERT;
 994
 995         if (desc->flags2 & READ_ELEMENT_STATUS_SVALID) {
 996
 997                 eaddr = scsi_2btoul(desc->ssea);
 998
 999                 /* convert source address to logical format */
1000                 for (et = CHET_MT; et <= CHET_DT; et++) {
1001                         if ((softc->sc_firsts[et] <= eaddr)
1002                             && ((softc->sc_firsts[et] + softc->sc_counts[et])
1003                                 > eaddr)) {
1004                                 ces->ces_source_addr =
1005                                         eaddr - softc->sc_firsts[et];
1006                                 ces->ces_source_type = et;
1007                                 ces->ces_flags |= CES_SOURCE_VALID;
1008                                 break;
1009                         }
1010                 }
1011
1012                 if (!(ces->ces_flags & CES_SOURCE_VALID))
1013                         printf("ch: warning: could not map element source "
1014                                "address %ud to a valid element type\n",
1015                                eaddr);
1016         }
1017
1018
1019         if (flags & READ_ELEMENT_STATUS_PVOLTAG)
1020                 copy_voltag(&(ces->ces_pvoltag), &(desc->pvoltag));
1021         if (flags & READ_ELEMENT_STATUS_AVOLTAG)
1022                 copy_voltag(&(ces->ces_avoltag), &(desc->avoltag));
1023
1024         if (desc->dt_scsi_flags & READ_ELEMENT_STATUS_DT_IDVALID) {
1025                 ces->ces_flags |= CES_SCSIID_VALID;
1026                 ces->ces_scsi_id = desc->dt_scsi_addr;
1027         }
1028
1029         if (desc->dt_scsi_addr & READ_ELEMENT_STATUS_DT_LUVALID) {
1030                 ces->ces_flags |= CES_LUN_VALID;
1031                 ces->ces_scsi_lun =
1032                         desc->dt_scsi_flags & READ_ELEMENT_STATUS_DT_LUNMASK;
1033         }
1034 }
1035
1036 static int
1037 chgetelemstatus(struct cam_periph *periph,
1038                 struct changer_element_status_request *cesr)
1039 {
1040         struct read_element_status_header *st_hdr;
1041         struct read_element_status_page_header *pg_hdr;
1042         struct read_element_status_descriptor *desc;
1043         caddr_t data = NULL;
1044         size_t size, desclen;
1045         int avail, i, error = 0;
1046         struct changer_element_status *user_data = NULL;
1047         struct ch_softc *softc;
1048         union ccb *ccb;
1049         int chet = cesr->cesr_element_type;
1050         int want_voltags = (cesr->cesr_flags & CESR_VOLTAGS) ? 1 : 0;
1051
1052         softc = (struct ch_softc *)periph->softc;
1053
1054         /* perform argument checking */
1055
1056         /*
1057          * Perform a range check on the cesr_element_{base,count}
1058          * request argument fields.
1059          */
1060         if ((softc->sc_counts[chet] - cesr->cesr_element_base) <= 0
1061             || (cesr->cesr_element_base + cesr->cesr_element_count)
1062                 > softc->sc_counts[chet])
1063                 return (EINVAL);
1064
1065         /*
1066          * Request one descriptor for the given element type.  This
1067          * is used to determine the size of the descriptor so that
1068          * we can allocate enough storage for all of them.  We assume
1069          * that the first one can fit into 1k.
1070          */
1071         cam_periph_unlock(periph);
1072         data = (caddr_t)malloc(1024, M_DEVBUF, M_WAITOK);
1073
1074         cam_periph_lock(periph);
1075         ccb = cam_periph_getccb(periph, /*priority*/ 1);
1076
1077         scsi_read_element_status(&ccb->csio,
1078                                  /* retries */ 1,
1079                                  /* cbfcnp */ chdone,
1080                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
1081                                  /* voltag */ want_voltags,
1082                                  /* sea */ softc->sc_firsts[chet],
1083                                  /* count */ 1,
1084                                  /* data_ptr */ data,
1085                                  /* dxfer_len */ 1024,
1086                                  /* sense_len */ SSD_FULL_SIZE,
1087                                  /* timeout */ CH_TIMEOUT_READ_ELEMENT_STATUS);
1088
1089         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1090                                   /*sense_flags*/ SF_RETRY_UA,
1091                                   softc->device_stats);
1092
1093         if (error)
1094                 goto done;
1095         cam_periph_unlock(periph);
1096
1097         st_hdr = (struct read_element_status_header *)data;
1098         pg_hdr = (struct read_element_status_page_header *)((uintptr_t)st_hdr +
1099                   sizeof(struct read_element_status_header));
1100         desclen = scsi_2btoul(pg_hdr->edl);
1101
1102         size = sizeof(struct read_element_status_header) +
1103                sizeof(struct read_element_status_page_header) +
1104                (desclen * cesr->cesr_element_count);
1105
1106         /*
1107          * Reallocate storage for descriptors and get them from the
1108          * device.
1109          */
1110         free(data, M_DEVBUF);
1111         data = (caddr_t)malloc(size, M_DEVBUF, M_WAITOK);
1112
1113         cam_periph_lock(periph);
1114         scsi_read_element_status(&ccb->csio,
1115                                  /* retries */ 1,
1116                                  /* cbfcnp */ chdone,
1117                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
1118                                  /* voltag */ want_voltags,
1119                                  /* sea */ softc->sc_firsts[chet]
1120                                  + cesr->cesr_element_base,
1121                                  /* count */ cesr->cesr_element_count,
1122                                  /* data_ptr */ data,
1123                                  /* dxfer_len */ size,
1124                                  /* sense_len */ SSD_FULL_SIZE,
1125                                  /* timeout */ CH_TIMEOUT_READ_ELEMENT_STATUS);
1126
1127         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1128                                   /*sense_flags*/ SF_RETRY_UA,
1129                                   softc->device_stats);
1130
1131         if (error)
1132                 goto done;
1133         cam_periph_unlock(periph);
1134
1135         /*
1136          * Fill in the user status array.
1137          */
1138         st_hdr = (struct read_element_status_header *)data;
1139         pg_hdr = (struct read_element_status_page_header *)((uintptr_t)st_hdr +
1140                   sizeof(struct read_element_status_header));
1141         avail = scsi_2btoul(st_hdr->count);
1142
1143         if (avail != cesr->cesr_element_count) {
1144                 xpt_print(periph->path,
1145                     "warning, READ ELEMENT STATUS avail != count\n");
1146         }
1147
1148         user_data = (struct changer_element_status *)
1149                 malloc(avail * sizeof(struct changer_element_status),
1150                        M_DEVBUF, M_WAITOK | M_ZERO);
1151
1152         desc = (struct read_element_status_descriptor *)((uintptr_t)data +
1153                 sizeof(struct read_element_status_header) +
1154                 sizeof(struct read_element_status_page_header));
1155         /*
1156          * Set up the individual element status structures
1157          */
1158         for (i = 0; i < avail; ++i) {
1159                 struct changer_element_status *ces = &(user_data[i]);
1160
1161                 copy_element_status(softc, pg_hdr->flags, desc, ces);
1162
1163                 desc = (struct read_element_status_descriptor *)
1164                        ((uintptr_t)desc + desclen);
1165         }
1166
1167         /* Copy element status structures out to userspace. */
1168         error = copyout(user_data,
1169                         cesr->cesr_element_status,
1170                         avail * sizeof(struct changer_element_status));
1171         cam_periph_lock(periph);
1172
1173  done:
1174         xpt_release_ccb(ccb);
1175
1176         if (data != NULL)
1177                 free(data, M_DEVBUF);
1178         if (user_data != NULL)
1179                 free(user_data, M_DEVBUF);
1180
1181         return (error);
1182 }
1183
1184 static int
1185 chielem(struct cam_periph *periph,
1186         unsigned int timeout)
1187 {
1188         union ccb *ccb;
1189         struct ch_softc *softc;
1190         int error;
1191
1192         if (!timeout) {
1193                 timeout = CH_TIMEOUT_INITIALIZE_ELEMENT_STATUS;
1194         } else {
1195                 timeout *= 1000;
1196         }
1197
1198         error = 0;
1199         softc = (struct ch_softc *)periph->softc;
1200
1201         ccb = cam_periph_getccb(periph, /*priority*/ 1);
1202
1203         scsi_initialize_element_status(&ccb->csio,
1204                                       /* retries */ 1,
1205                                       /* cbfcnp */ chdone,
1206                                       /* tag_action */ MSG_SIMPLE_Q_TAG,
1207                                       /* sense_len */ SSD_FULL_SIZE,
1208                                       /* timeout */ timeout);
1209
1210         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1211                                   /*sense_flags*/ SF_RETRY_UA,
1212                                   softc->device_stats);
1213
1214         xpt_release_ccb(ccb);
1215
1216         return(error);
1217 }
1218
1219 static int
1220 chsetvoltag(struct cam_periph *periph,
1221             struct changer_set_voltag_request *csvr)
1222 {
1223         union ccb *ccb;
1224         struct ch_softc *softc;
1225         u_int16_t ea;
1226         u_int8_t sac;
1227         struct scsi_send_volume_tag_parameters ssvtp;
1228         int error;
1229         int i;
1230
1231         error = 0;
1232         softc = (struct ch_softc *)periph->softc;
1233
1234         bzero(&ssvtp, sizeof(ssvtp));
1235         for (i=0; i<sizeof(ssvtp.vitf); i++) {
1236                 ssvtp.vitf[i] = ' ';
1237         }
1238
1239         /*
1240          * Check arguments.
1241          */
1242         if (csvr->csvr_type > CHET_DT)
1243                 return EINVAL;
1244         if (csvr->csvr_addr > (softc->sc_counts[csvr->csvr_type] - 1))
1245                 return ENODEV;
1246
1247         ea = softc->sc_firsts[csvr->csvr_type] + csvr->csvr_addr;
1248
1249         if (csvr->csvr_flags & CSVR_ALTERNATE) {
1250                 switch (csvr->csvr_flags & CSVR_MODE_MASK) {
1251                 case CSVR_MODE_SET:
1252                         sac = SEND_VOLUME_TAG_ASSERT_ALTERNATE;
1253                         break;
1254                 case CSVR_MODE_REPLACE:
1255                         sac = SEND_VOLUME_TAG_REPLACE_ALTERNATE;
1256                         break;
1257                 case CSVR_MODE_CLEAR:
1258                         sac = SEND_VOLUME_TAG_UNDEFINED_ALTERNATE;
1259                         break;
1260                 default:
1261                         error = EINVAL;
1262                         goto out;
1263                 }
1264         } else {
1265                 switch (csvr->csvr_flags & CSVR_MODE_MASK) {
1266                 case CSVR_MODE_SET:
1267                         sac = SEND_VOLUME_TAG_ASSERT_PRIMARY;
1268                         break;
1269                 case CSVR_MODE_REPLACE:
1270                         sac = SEND_VOLUME_TAG_REPLACE_PRIMARY;
1271                         break;
1272                 case CSVR_MODE_CLEAR:
1273                         sac = SEND_VOLUME_TAG_UNDEFINED_PRIMARY;
1274                         break;
1275                 default:
1276                         error = EINVAL;
1277                         goto out;
1278                 }
1279         }
1280
1281         memcpy(ssvtp.vitf, csvr->csvr_voltag.cv_volid,
1282                min(strlen(csvr->csvr_voltag.cv_volid), sizeof(ssvtp.vitf)));
1283         scsi_ulto2b(csvr->csvr_voltag.cv_serial, ssvtp.minvsn);
1284
1285         ccb = cam_periph_getccb(periph, /*priority*/ 1);
1286
1287         scsi_send_volume_tag(&ccb->csio,
1288                              /* retries */ 1,
1289                              /* cbfcnp */ chdone,
1290                              /* tag_action */ MSG_SIMPLE_Q_TAG,
1291                              /* element_address */ ea,
1292                              /* send_action_code */ sac,
1293                              /* parameters */ &ssvtp,
1294                              /* sense_len */ SSD_FULL_SIZE,
1295                              /* timeout */ CH_TIMEOUT_SEND_VOLTAG);
1296
1297         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1298                                   /*sense_flags*/ SF_RETRY_UA,
1299                                   softc->device_stats);
1300
1301         xpt_release_ccb(ccb);
1302
1303  out:
1304         return error;
1305 }
1306
1307 static int
1308 chgetparams(struct cam_periph *periph)
1309 {
1310         union ccb *ccb;
1311         struct ch_softc *softc;
1312         void *mode_buffer;
1313         int mode_buffer_len;
1314         struct page_element_address_assignment *ea;
1315         struct page_device_capabilities *cap;
1316         int error, from, dbd;
1317         u_int8_t *moves, *exchanges;
1318
1319         error = 0;
1320
1321         softc = (struct ch_softc *)periph->softc;
1322
1323         ccb = cam_periph_getccb(periph, /*priority*/ 1);
1324
1325         /*
1326          * The scsi_mode_sense_data structure is just a convenience
1327          * structure that allows us to easily calculate the worst-case
1328          * storage size of the mode sense buffer.
1329          */
1330         mode_buffer_len = sizeof(struct scsi_mode_sense_data);
1331
1332         mode_buffer = malloc(mode_buffer_len, M_SCSICH, M_NOWAIT);
1333
1334         if (mode_buffer == NULL) {
1335                 printf("chgetparams: couldn't malloc mode sense data\n");
1336                 return(ENOSPC);
1337         }
1338
1339         bzero(mode_buffer, mode_buffer_len);
1340
1341         if (softc->quirks & CH_Q_NO_DBD)
1342                 dbd = FALSE;
1343         else
1344                 dbd = TRUE;
1345
1346         /*
1347          * Get the element address assignment page.
1348          */
1349         scsi_mode_sense(&ccb->csio,
1350                         /* retries */ 1,
1351                         /* cbfcnp */ chdone,
1352                         /* tag_action */ MSG_SIMPLE_Q_TAG,
1353                         /* dbd */ dbd,
1354                         /* page_code */ SMS_PAGE_CTRL_CURRENT,
1355                         /* page */ CH_ELEMENT_ADDR_ASSIGN_PAGE,
1356                         /* param_buf */ (u_int8_t *)mode_buffer,
1357                         /* param_len */ mode_buffer_len,
1358                         /* sense_len */ SSD_FULL_SIZE,
1359                         /* timeout */ CH_TIMEOUT_MODE_SENSE);
1360
1361         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1362                                   /* sense_flags */ SF_RETRY_UA|SF_NO_PRINT,
1363                                   softc->device_stats);
1364
1365         if (error) {
1366                 if (dbd) {
1367                         struct scsi_mode_sense_6 *sms;
1368
1369                         sms = (struct scsi_mode_sense_6 *)
1370                                 ccb->csio.cdb_io.cdb_bytes;
1371
1372                         sms->byte2 &= ~SMS_DBD;
1373                         error = cam_periph_runccb(ccb, cherror,
1374                                                   /*cam_flags*/ CAM_RETRY_SELTO,
1375                                                   /*sense_flags*/ SF_RETRY_UA,
1376                                                   softc->device_stats);
1377                 } else {
1378                         /*
1379                          * Since we disabled sense printing above, print
1380                          * out the sense here since we got an error.
1381                          */
1382                         scsi_sense_print(&ccb->csio);
1383                 }
1384
1385                 if (error) {
1386                         xpt_print(periph->path,
1387                             "chgetparams: error getting element "
1388                             "address page\n");
1389                         xpt_release_ccb(ccb);
1390                         free(mode_buffer, M_SCSICH);
1391                         return(error);
1392                 }
1393         }
1394
1395         ea = (struct page_element_address_assignment *)
1396                 find_mode_page_6((struct scsi_mode_header_6 *)mode_buffer);
1397
1398         softc->sc_firsts[CHET_MT] = scsi_2btoul(ea->mtea);
1399         softc->sc_counts[CHET_MT] = scsi_2btoul(ea->nmte);
1400         softc->sc_firsts[CHET_ST] = scsi_2btoul(ea->fsea);
1401         softc->sc_counts[CHET_ST] = scsi_2btoul(ea->nse);
1402         softc->sc_firsts[CHET_IE] = scsi_2btoul(ea->fieea);
1403         softc->sc_counts[CHET_IE] = scsi_2btoul(ea->niee);
1404         softc->sc_firsts[CHET_DT] = scsi_2btoul(ea->fdtea);
1405         softc->sc_counts[CHET_DT] = scsi_2btoul(ea->ndte);
1406
1407         bzero(mode_buffer, mode_buffer_len);
1408
1409         /*
1410          * Now get the device capabilities page.
1411          */
1412         scsi_mode_sense(&ccb->csio,
1413                         /* retries */ 1,
1414                         /* cbfcnp */ chdone,
1415                         /* tag_action */ MSG_SIMPLE_Q_TAG,
1416                         /* dbd */ dbd,
1417                         /* page_code */ SMS_PAGE_CTRL_CURRENT,
1418                         /* page */ CH_DEVICE_CAP_PAGE,
1419                         /* param_buf */ (u_int8_t *)mode_buffer,
1420                         /* param_len */ mode_buffer_len,
1421                         /* sense_len */ SSD_FULL_SIZE,
1422                         /* timeout */ CH_TIMEOUT_MODE_SENSE);
1423
1424         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1425                                   /* sense_flags */ SF_RETRY_UA | SF_NO_PRINT,
1426                                   softc->device_stats);
1427
1428         if (error) {
1429                 if (dbd) {
1430                         struct scsi_mode_sense_6 *sms;
1431
1432                         sms = (struct scsi_mode_sense_6 *)
1433                                 ccb->csio.cdb_io.cdb_bytes;
1434
1435                         sms->byte2 &= ~SMS_DBD;
1436                         error = cam_periph_runccb(ccb, cherror,
1437                                                   /*cam_flags*/ CAM_RETRY_SELTO,
1438                                                   /*sense_flags*/ SF_RETRY_UA,
1439                                                   softc->device_stats);
1440                 } else {
1441                         /*
1442                          * Since we disabled sense printing above, print
1443                          * out the sense here since we got an error.
1444                          */
1445                         scsi_sense_print(&ccb->csio);
1446                 }
1447
1448                 if (error) {
1449                         xpt_print(periph->path,
1450                             "chgetparams: error getting device "
1451                             "capabilities page\n");
1452                         xpt_release_ccb(ccb);
1453                         free(mode_buffer, M_SCSICH);
1454                         return(error);
1455                 }
1456         }
1457
1458         xpt_release_ccb(ccb);
1459
1460         cap = (struct page_device_capabilities *)
1461                 find_mode_page_6((struct scsi_mode_header_6 *)mode_buffer);
1462
1463         bzero(softc->sc_movemask, sizeof(softc->sc_movemask));
1464         bzero(softc->sc_exchangemask, sizeof(softc->sc_exchangemask));
1465         moves = cap->move_from;
1466         exchanges = cap->exchange_with;
1467         for (from = CHET_MT; from <= CHET_MAX; ++from) {
1468                 softc->sc_movemask[from] = moves[from];
1469                 softc->sc_exchangemask[from] = exchanges[from];
1470         }
1471
1472         free(mode_buffer, M_SCSICH);
1473
1474         return(error);
1475 }
1476
1477 void
1478 scsi_move_medium(struct ccb_scsiio *csio, u_int32_t retries,
1479                  void (*cbfcnp)(struct cam_periph *, union ccb *),
1480                  u_int8_t tag_action, u_int32_t tea, u_int32_t src,
1481                  u_int32_t dst, int invert, u_int8_t sense_len,
1482                  u_int32_t timeout)
1483 {
1484         struct scsi_move_medium *scsi_cmd;
1485
1486         scsi_cmd = (struct scsi_move_medium *)&csio->cdb_io.cdb_bytes;
1487         bzero(scsi_cmd, sizeof(*scsi_cmd));
1488
1489         scsi_cmd->opcode = MOVE_MEDIUM;
1490
1491         scsi_ulto2b(tea, scsi_cmd->tea);
1492         scsi_ulto2b(src, scsi_cmd->src);
1493         scsi_ulto2b(dst, scsi_cmd->dst);
1494
1495         if (invert)
1496                 scsi_cmd->invert |= MOVE_MEDIUM_INVERT;
1497
1498         cam_fill_csio(csio,
1499                       retries,
1500                       cbfcnp,
1501                       /*flags*/ CAM_DIR_NONE,
1502                       tag_action,
1503                       /*data_ptr*/ NULL,
1504                       /*dxfer_len*/ 0,
1505                       sense_len,
1506                       sizeof(*scsi_cmd),
1507                       timeout);
1508 }
1509
1510 void
1511 scsi_exchange_medium(struct ccb_scsiio *csio, u_int32_t retries,
1512                      void (*cbfcnp)(struct cam_periph *, union ccb *),
1513                      u_int8_t tag_action, u_int32_t tea, u_int32_t src,
1514                      u_int32_t dst1, u_int32_t dst2, int invert1,
1515                      int invert2, u_int8_t sense_len, u_int32_t timeout)
1516 {
1517         struct scsi_exchange_medium *scsi_cmd;
1518
1519         scsi_cmd = (struct scsi_exchange_medium *)&csio->cdb_io.cdb_bytes;
1520         bzero(scsi_cmd, sizeof(*scsi_cmd));
1521
1522         scsi_cmd->opcode = EXCHANGE_MEDIUM;
1523
1524         scsi_ulto2b(tea, scsi_cmd->tea);
1525         scsi_ulto2b(src, scsi_cmd->src);
1526         scsi_ulto2b(dst1, scsi_cmd->fdst);
1527         scsi_ulto2b(dst2, scsi_cmd->sdst);
1528
1529         if (invert1)
1530                 scsi_cmd->invert |= EXCHANGE_MEDIUM_INV1;
1531
1532         if (invert2)
1533                 scsi_cmd->invert |= EXCHANGE_MEDIUM_INV2;
1534
1535         cam_fill_csio(csio,
1536                       retries,
1537                       cbfcnp,
1538                       /*flags*/ CAM_DIR_NONE,
1539                       tag_action,
1540                       /*data_ptr*/ NULL,
1541                       /*dxfer_len*/ 0,
1542                       sense_len,
1543                       sizeof(*scsi_cmd),
1544                       timeout);
1545 }
1546
1547 void
1548 scsi_position_to_element(struct ccb_scsiio *csio, u_int32_t retries,
1549                          void (*cbfcnp)(struct cam_periph *, union ccb *),
1550                          u_int8_t tag_action, u_int32_t tea, u_int32_t dst,
1551                          int invert, u_int8_t sense_len, u_int32_t timeout)
1552 {
1553         struct scsi_position_to_element *scsi_cmd;
1554
1555         scsi_cmd = (struct scsi_position_to_element *)&csio->cdb_io.cdb_bytes;
1556         bzero(scsi_cmd, sizeof(*scsi_cmd));
1557
1558         scsi_cmd->opcode = POSITION_TO_ELEMENT;
1559
1560         scsi_ulto2b(tea, scsi_cmd->tea);
1561         scsi_ulto2b(dst, scsi_cmd->dst);
1562
1563         if (invert)
1564                 scsi_cmd->invert |= POSITION_TO_ELEMENT_INVERT;
1565
1566         cam_fill_csio(csio,
1567                       retries,
1568                       cbfcnp,
1569                       /*flags*/ CAM_DIR_NONE,
1570                       tag_action,
1571                       /*data_ptr*/ NULL,
1572                       /*dxfer_len*/ 0,
1573                       sense_len,
1574                       sizeof(*scsi_cmd),
1575                       timeout);
1576 }
1577
1578 void
1579 scsi_read_element_status(struct ccb_scsiio *csio, u_int32_t retries,
1580                          void (*cbfcnp)(struct cam_periph *, union ccb *),
1581                          u_int8_t tag_action, int voltag, u_int32_t sea,
1582                          u_int32_t count, u_int8_t *data_ptr,
1583                          u_int32_t dxfer_len, u_int8_t sense_len,
1584                          u_int32_t timeout)
1585 {
1586         struct scsi_read_element_status *scsi_cmd;
1587
1588         scsi_cmd = (struct scsi_read_element_status *)&csio->cdb_io.cdb_bytes;
1589         bzero(scsi_cmd, sizeof(*scsi_cmd));
1590
1591         scsi_cmd->opcode = READ_ELEMENT_STATUS;
1592
1593         scsi_ulto2b(sea, scsi_cmd->sea);
1594         scsi_ulto2b(count, scsi_cmd->count);
1595         scsi_ulto3b(dxfer_len, scsi_cmd->len);
1596
1597         if (voltag)
1598                 scsi_cmd->byte2 |= READ_ELEMENT_STATUS_VOLTAG;
1599
1600         cam_fill_csio(csio,
1601                       retries,
1602                       cbfcnp,
1603                       /*flags*/ CAM_DIR_IN,
1604                       tag_action,
1605                       data_ptr,
1606                       dxfer_len,
1607                       sense_len,
1608                       sizeof(*scsi_cmd),
1609                       timeout);
1610 }
1611
1612 void
1613 scsi_initialize_element_status(struct ccb_scsiio *csio, u_int32_t retries,
1614                                void (*cbfcnp)(struct cam_periph *, union ccb *),
1615                                u_int8_t tag_action, u_int8_t sense_len,
1616                                u_int32_t timeout)
1617 {
1618         struct scsi_initialize_element_status *scsi_cmd;
1619
1620         scsi_cmd = (struct scsi_initialize_element_status *)
1621                     &csio->cdb_io.cdb_bytes;
1622         bzero(scsi_cmd, sizeof(*scsi_cmd));
1623
1624         scsi_cmd->opcode = INITIALIZE_ELEMENT_STATUS;
1625
1626         cam_fill_csio(csio,
1627                       retries,
1628                       cbfcnp,
1629                       /*flags*/ CAM_DIR_NONE,
1630                       tag_action,
1631                       /* data_ptr */ NULL,
1632                       /* dxfer_len */ 0,
1633                       sense_len,
1634                       sizeof(*scsi_cmd),
1635                       timeout);
1636 }
1637
1638 void
1639 scsi_send_volume_tag(struct ccb_scsiio *csio, u_int32_t retries,
1640                      void (*cbfcnp)(struct cam_periph *, union ccb *),
1641                      u_int8_t tag_action,
1642                      u_int16_t element_address,
1643                      u_int8_t send_action_code,
1644                      struct scsi_send_volume_tag_parameters *parameters,
1645                      u_int8_t sense_len, u_int32_t timeout)
1646 {
1647         struct scsi_send_volume_tag *scsi_cmd;
1648
1649         scsi_cmd = (struct scsi_send_volume_tag *) &csio->cdb_io.cdb_bytes;
1650         bzero(scsi_cmd, sizeof(*scsi_cmd));
1651
1652         scsi_cmd->opcode = SEND_VOLUME_TAG;
1653         scsi_ulto2b(element_address, scsi_cmd->ea);
1654         scsi_cmd->sac = send_action_code;
1655         scsi_ulto2b(sizeof(*parameters), scsi_cmd->pll);
1656
1657         cam_fill_csio(csio,
1658                       retries,
1659                       cbfcnp,
1660                       /*flags*/ CAM_DIR_OUT,
1661                       tag_action,
1662                       /* data_ptr */ (u_int8_t *) parameters,
1663                       sizeof(*parameters),
1664                       sense_len,
1665                       sizeof(*scsi_cmd),
1666                       timeout);
1667 }