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 (cgd->protocol != PROTO_SCSI)
 291                         break;
 292
 293                 if (SID_TYPE(&cgd->inq_data)!= T_CHANGER)
 294                         break;
 295
 296                 /*
 297                  * Allocate a peripheral instance for
 298                  * this device and start the probe
 299                  * process.
 300                  */
 301                 status = cam_periph_alloc(chregister, choninvalidate,
 302                                           chcleanup, chstart, "ch",
 303                                           CAM_PERIPH_BIO, cgd->ccb_h.path,
 304                                           chasync, AC_FOUND_DEVICE, cgd);
 305
 306                 if (status != CAM_REQ_CMP
 307                  && status != CAM_REQ_INPROG)
 308                         printf("chasync: Unable to probe new device "
 309                                "due to status 0x%x\n", status);
 310
 311                 break;
 312
 313         }
 314         default:
 315                 cam_periph_async(periph, code, path, arg);
 316                 break;
 317         }
 318 }
 319
 320 static cam_status
 321 chregister(struct cam_periph *periph, void *arg)
 322 {
 323         struct ch_softc *softc;
 324         struct ccb_getdev *cgd;
 325         struct ccb_pathinq cpi;
 326
 327         cgd = (struct ccb_getdev *)arg;
 328         if (periph == NULL) {
 329                 printf("chregister: periph was NULL!!\n");
 330                 return(CAM_REQ_CMP_ERR);
 331         }
 332
 333         if (cgd == NULL) {
 334                 printf("chregister: no getdev CCB, can't register device\n");
 335                 return(CAM_REQ_CMP_ERR);
 336         }
 337
 338         softc = (struct ch_softc *)malloc(sizeof(*softc),M_DEVBUF,M_NOWAIT);
 339
 340         if (softc == NULL) {
 341                 printf("chregister: Unable to probe new device. "
 342                        "Unable to allocate softc\n");
 343                 return(CAM_REQ_CMP_ERR);
 344         }
 345
 346         bzero(softc, sizeof(*softc));
 347         softc->state = CH_STATE_PROBE;
 348         periph->softc = softc;
 349         softc->quirks = CH_Q_NONE;
 350
 351         bzero(&cpi, sizeof(cpi));
 352         xpt_setup_ccb(&cpi.ccb_h, periph->path, CAM_PRIORITY_NORMAL);
 353         cpi.ccb_h.func_code = XPT_PATH_INQ;
 354         xpt_action((union ccb *)&cpi);
 355
 356         /*
 357          * Changers don't have a blocksize, and obviously don't support
 358          * tagged queueing.
 359          */
 360         cam_periph_unlock(periph);
 361         softc->device_stats = devstat_new_entry("ch",
 362                           periph->unit_number, 0,
 363                           DEVSTAT_NO_BLOCKSIZE | DEVSTAT_NO_ORDERED_TAGS,
 364                           SID_TYPE(&cgd->inq_data) |
 365                           XPORT_DEVSTAT_TYPE(cpi.transport),
 366                           DEVSTAT_PRIORITY_OTHER);
 367
 368         /* Register the device */
 369         softc->dev = make_dev(&ch_cdevsw, periph->unit_number, UID_ROOT,
 370                               GID_OPERATOR, 0600, "%s%d", periph->periph_name,
 371                               periph->unit_number);
 372         cam_periph_lock(periph);
 373         softc->dev->si_drv1 = periph;
 374
 375         /*
 376          * Add an async callback so that we get
 377          * notified if this device goes away.
 378          */
 379         xpt_register_async(AC_LOST_DEVICE, chasync, periph, periph->path);
 380
 381         /*
 382          * Lock this periph until we are setup.
 383          * This first call can't block
 384          */
 385         (void)cam_periph_hold(periph, PRIBIO);
 386         xpt_schedule(periph, CAM_PRIORITY_DEV);
 387
 388         return(CAM_REQ_CMP);
 389 }
 390
 391 static int
 392 chopen(struct cdev *dev, int flags, int fmt, struct thread *td)
 393 {
 394         struct cam_periph *periph;
 395         struct ch_softc *softc;
 396         int error;
 397
 398         periph = (struct cam_periph *)dev->si_drv1;
 399         if (cam_periph_acquire(periph) != CAM_REQ_CMP)
 400                 return (ENXIO);
 401
 402         softc = (struct ch_softc *)periph->softc;
 403
 404         cam_periph_lock(periph);
 405
 406         if (softc->flags & CH_FLAG_INVALID) {
 407                 cam_periph_unlock(periph);
 408                 cam_periph_release(periph);
 409                 return(ENXIO);
 410         }
 411
 412         if ((softc->flags & CH_FLAG_OPEN) == 0)
 413                 softc->flags |= CH_FLAG_OPEN;
 414         else
 415                 cam_periph_release(periph);
 416
 417         if ((error = cam_periph_hold(periph, PRIBIO | PCATCH)) != 0) {
 418                 cam_periph_unlock(periph);
 419                 cam_periph_release(periph);
 420                 return (error);
 421         }
 422
 423         /*
 424          * Load information about this changer device into the softc.
 425          */
 426         if ((error = chgetparams(periph)) != 0) {
 427                 softc->flags &= ~CH_FLAG_OPEN;
 428                 cam_periph_unlock(periph);
 429                 cam_periph_release(periph);
 430                 return(error);
 431         }
 432
 433         cam_periph_unhold(periph);
 434         cam_periph_unlock(periph);
 435
 436         return(error);
 437 }
 438
 439 static int
 440 chclose(struct cdev *dev, int flag, int fmt, struct thread *td)
 441 {
 442         struct  cam_periph *periph;
 443         struct  ch_softc *softc;
 444         int     error;
 445
 446         error = 0;
 447
 448         periph = (struct cam_periph *)dev->si_drv1;
 449         if (periph == NULL)
 450                 return(ENXIO);
 451
 452         softc = (struct ch_softc *)periph->softc;
 453
 454         cam_periph_lock(periph);
 455
 456         softc->flags &= ~CH_FLAG_OPEN;
 457
 458         cam_periph_unlock(periph);
 459         cam_periph_release(periph);
 460
 461         return(0);
 462 }
 463
 464 static void
 465 chstart(struct cam_periph *periph, union ccb *start_ccb)
 466 {
 467         struct ch_softc *softc;
 468
 469         softc = (struct ch_softc *)periph->softc;
 470
 471         switch (softc->state) {
 472         case CH_STATE_NORMAL:
 473         {
 474                 if (periph->immediate_priority <= periph->pinfo.priority){
 475                         start_ccb->ccb_h.ccb_state = CH_CCB_WAITING;
 476
 477                         SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
 478                                           periph_links.sle);
 479                         periph->immediate_priority = CAM_PRIORITY_NONE;
 480                         wakeup(&periph->ccb_list);
 481                 }
 482                 break;
 483         }
 484         case CH_STATE_PROBE:
 485         {
 486                 int mode_buffer_len;
 487                 void *mode_buffer;
 488
 489                 /*
 490                  * Include the block descriptor when calculating the mode
 491                  * buffer length,
 492                  */
 493                 mode_buffer_len = sizeof(struct scsi_mode_header_6) +
 494                                   sizeof(struct scsi_mode_blk_desc) +
 495                                  sizeof(struct page_element_address_assignment);
 496
 497                 mode_buffer = malloc(mode_buffer_len, M_SCSICH, M_NOWAIT);
 498
 499                 if (mode_buffer == NULL) {
 500                         printf("chstart: couldn't malloc mode sense data\n");
 501                         break;
 502                 }
 503                 bzero(mode_buffer, mode_buffer_len);
 504
 505                 /*
 506                  * Get the element address assignment page.
 507                  */
 508                 scsi_mode_sense(&start_ccb->csio,
 509                                 /* retries */ 1,
 510                                 /* cbfcnp */ chdone,
 511                                 /* tag_action */ MSG_SIMPLE_Q_TAG,
 512                                 /* dbd */ (softc->quirks & CH_Q_NO_DBD) ?
 513                                         FALSE : TRUE,
 514                                 /* page_code */ SMS_PAGE_CTRL_CURRENT,
 515                                 /* page */ CH_ELEMENT_ADDR_ASSIGN_PAGE,
 516                                 /* param_buf */ (u_int8_t *)mode_buffer,
 517                                 /* param_len */ mode_buffer_len,
 518                                 /* sense_len */ SSD_FULL_SIZE,
 519                                 /* timeout */ CH_TIMEOUT_MODE_SENSE);
 520
 521                 start_ccb->ccb_h.ccb_bp = NULL;
 522                 start_ccb->ccb_h.ccb_state = CH_CCB_PROBE;
 523                 xpt_action(start_ccb);
 524                 break;
 525         }
 526         }
 527 }
 528
 529 static void
 530 chdone(struct cam_periph *periph, union ccb *done_ccb)
 531 {
 532         struct ch_softc *softc;
 533         struct ccb_scsiio *csio;
 534
 535         softc = (struct ch_softc *)periph->softc;
 536         csio = &done_ccb->csio;
 537
 538         switch(done_ccb->ccb_h.ccb_state) {
 539         case CH_CCB_PROBE:
 540         {
 541                 struct scsi_mode_header_6 *mode_header;
 542                 struct page_element_address_assignment *ea;
 543                 char announce_buf[80];
 544
 545
 546                 mode_header = (struct scsi_mode_header_6 *)csio->data_ptr;
 547
 548                 ea = (struct page_element_address_assignment *)
 549                         find_mode_page_6(mode_header);
 550
 551                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP){
 552
 553                         softc->sc_firsts[CHET_MT] = scsi_2btoul(ea->mtea);
 554                         softc->sc_counts[CHET_MT] = scsi_2btoul(ea->nmte);
 555                         softc->sc_firsts[CHET_ST] = scsi_2btoul(ea->fsea);
 556                         softc->sc_counts[CHET_ST] = scsi_2btoul(ea->nse);
 557                         softc->sc_firsts[CHET_IE] = scsi_2btoul(ea->fieea);
 558                         softc->sc_counts[CHET_IE] = scsi_2btoul(ea->niee);
 559                         softc->sc_firsts[CHET_DT] = scsi_2btoul(ea->fdtea);
 560                         softc->sc_counts[CHET_DT] = scsi_2btoul(ea->ndte);
 561                         softc->sc_picker = softc->sc_firsts[CHET_MT];
 562
 563 #define PLURAL(c)       (c) == 1 ? "" : "s"
 564                         snprintf(announce_buf, sizeof(announce_buf),
 565                                 "%d slot%s, %d drive%s, "
 566                                 "%d picker%s, %d portal%s",
 567                                 softc->sc_counts[CHET_ST],
 568                                 PLURAL(softc->sc_counts[CHET_ST]),
 569                                 softc->sc_counts[CHET_DT],
 570                                 PLURAL(softc->sc_counts[CHET_DT]),
 571                                 softc->sc_counts[CHET_MT],
 572                                 PLURAL(softc->sc_counts[CHET_MT]),
 573                                 softc->sc_counts[CHET_IE],
 574                                 PLURAL(softc->sc_counts[CHET_IE]));
 575 #undef PLURAL
 576                 } else {
 577                         int error;
 578
 579                         error = cherror(done_ccb, CAM_RETRY_SELTO,
 580                                         SF_RETRY_UA | SF_NO_PRINT);
 581                         /*
 582                          * Retry any UNIT ATTENTION type errors.  They
 583                          * are expected at boot.
 584                          */
 585                         if (error == ERESTART) {
 586                                 /*
 587                                  * A retry was scheuled, so
 588                                  * just return.
 589                                  */
 590                                 return;
 591                         } else if (error != 0) {
 592                                 int retry_scheduled;
 593                                 struct scsi_mode_sense_6 *sms;
 594
 595                                 sms = (struct scsi_mode_sense_6 *)
 596                                         done_ccb->csio.cdb_io.cdb_bytes;
 597
 598                                 /*
 599                                  * Check to see if block descriptors were
 600                                  * disabled.  Some devices don't like that.
 601                                  * We're taking advantage of the fact that
 602                                  * the first few bytes of the 6 and 10 byte
 603                                  * mode sense commands are the same.  If
 604                                  * block descriptors were disabled, enable
 605                                  * them and re-send the command.
 606                                  */
 607                                 if (sms->byte2 & SMS_DBD) {
 608                                         sms->byte2 &= ~SMS_DBD;
 609                                         xpt_action(done_ccb);
 610                                         softc->quirks |= CH_Q_NO_DBD;
 611                                         retry_scheduled = 1;
 612                                 } else
 613                                         retry_scheduled = 0;
 614
 615                                 /* Don't wedge this device's queue */
 616                                 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
 617                                         cam_release_devq(done_ccb->ccb_h.path,
 618                                                  /*relsim_flags*/0,
 619                                                  /*reduction*/0,
 620                                                  /*timeout*/0,
 621                                                  /*getcount_only*/0);
 622
 623                                 if (retry_scheduled)
 624                                         return;
 625
 626                                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK)
 627                                     == CAM_SCSI_STATUS_ERROR)
 628                                         scsi_sense_print(&done_ccb->csio);
 629                                 else {
 630                                         xpt_print(periph->path,
 631                                             "got CAM status %#x\n",
 632                                             done_ccb->ccb_h.status);
 633                                 }
 634                                 xpt_print(periph->path, "fatal error, failed "
 635                                     "to attach to device\n");
 636
 637                                 cam_periph_invalidate(periph);
 638
 639                                 announce_buf[0] = '\0';
 640                         }
 641                 }
 642                 if (announce_buf[0] != '\0')
 643                         xpt_announce_periph(periph, announce_buf);
 644                 softc->state = CH_STATE_NORMAL;
 645                 free(mode_header, M_SCSICH);
 646                 /*
 647                  * Since our peripheral may be invalidated by an error
 648                  * above or an external event, we must release our CCB
 649                  * before releasing the probe lock on the peripheral.
 650                  * The peripheral will only go away once the last lock
 651                  * is removed, and we need it around for the CCB release
 652                  * operation.
 653                  */
 654                 xpt_release_ccb(done_ccb);
 655                 cam_periph_unhold(periph);
 656                 return;
 657         }
 658         case CH_CCB_WAITING:
 659         {
 660                 /* Caller will release the CCB */
 661                 wakeup(&done_ccb->ccb_h.cbfcnp);
 662                 return;
 663         }
 664         default:
 665                 break;
 666         }
 667         xpt_release_ccb(done_ccb);
 668 }
 669
 670 static int
 671 cherror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
 672 {
 673         struct ch_softc *softc;
 674         struct cam_periph *periph;
 675
 676         periph = xpt_path_periph(ccb->ccb_h.path);
 677         softc = (struct ch_softc *)periph->softc;
 678
 679         return (cam_periph_error(ccb, cam_flags, sense_flags,
 680                                  &softc->saved_ccb));
 681 }
 682
 683 static int
 684 chioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 685 {
 686         struct cam_periph *periph;
 687         struct ch_softc *softc;
 688         int error;
 689
 690         periph = (struct cam_periph *)dev->si_drv1;
 691         if (periph == NULL)
 692                 return(ENXIO);
 693
 694         cam_periph_lock(periph);
 695         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering chioctl\n"));
 696
 697         softc = (struct ch_softc *)periph->softc;
 698
 699         error = 0;
 700
 701         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
 702                   ("trying to do ioctl %#lx\n", cmd));
 703
 704         /*
 705          * If this command can change the device's state, we must
 706          * have the device open for writing.
 707          */
 708         switch (cmd) {
 709         case CHIOGPICKER:
 710         case CHIOGPARAMS:
 711         case CHIOGSTATUS:
 712                 break;
 713
 714         default:
 715                 if ((flag & FWRITE) == 0) {
 716                         cam_periph_unlock(periph);
 717                         return (EBADF);
 718                 }
 719         }
 720
 721         switch (cmd) {
 722         case CHIOMOVE:
 723                 error = chmove(periph, (struct changer_move *)addr);
 724                 break;
 725
 726         case CHIOEXCHANGE:
 727                 error = chexchange(periph, (struct changer_exchange *)addr);
 728                 break;
 729
 730         case CHIOPOSITION:
 731                 error = chposition(periph, (struct changer_position *)addr);
 732                 break;
 733
 734         case CHIOGPICKER:
 735                 *(int *)addr = softc->sc_picker - softc->sc_firsts[CHET_MT];
 736                 break;
 737
 738         case CHIOSPICKER:
 739         {
 740                 int new_picker = *(int *)addr;
 741
 742                 if (new_picker > (softc->sc_counts[CHET_MT] - 1)) {
 743                         error = EINVAL;
 744                         break;
 745                 }
 746                 softc->sc_picker = softc->sc_firsts[CHET_MT] + new_picker;
 747                 break;
 748         }
 749         case CHIOGPARAMS:
 750         {
 751                 struct changer_params *cp = (struct changer_params *)addr;
 752
 753                 cp->cp_npickers = softc->sc_counts[CHET_MT];
 754                 cp->cp_nslots = softc->sc_counts[CHET_ST];
 755                 cp->cp_nportals = softc->sc_counts[CHET_IE];
 756                 cp->cp_ndrives = softc->sc_counts[CHET_DT];
 757                 break;
 758         }
 759         case CHIOIELEM:
 760                 error = chielem(periph, *(unsigned int *)addr);
 761                 break;
 762
 763         case CHIOGSTATUS:
 764         {
 765                 error = chgetelemstatus(periph,
 766                                (struct changer_element_status_request *) addr);
 767                 break;
 768         }
 769
 770         case CHIOSETVOLTAG:
 771         {
 772                 error = chsetvoltag(periph,
 773                                     (struct changer_set_voltag_request *) addr);
 774                 break;
 775         }
 776
 777         /* Implement prevent/allow? */
 778
 779         default:
 780                 error = cam_periph_ioctl(periph, cmd, addr, cherror);
 781                 break;
 782         }
 783
 784         cam_periph_unlock(periph);
 785         return (error);
 786 }
 787
 788 static int
 789 chmove(struct cam_periph *periph, struct changer_move *cm)
 790 {
 791         struct ch_softc *softc;
 792         u_int16_t fromelem, toelem;
 793         union ccb *ccb;
 794         int error;
 795
 796         error = 0;
 797         softc = (struct ch_softc *)periph->softc;
 798
 799         /*
 800          * Check arguments.
 801          */
 802         if ((cm->cm_fromtype > CHET_DT) || (cm->cm_totype > CHET_DT))
 803                 return (EINVAL);
 804         if ((cm->cm_fromunit > (softc->sc_counts[cm->cm_fromtype] - 1)) ||
 805             (cm->cm_tounit > (softc->sc_counts[cm->cm_totype] - 1)))
 806                 return (ENODEV);
 807
 808         /*
 809          * Check the request against the changer's capabilities.
 810          */
 811         if ((softc->sc_movemask[cm->cm_fromtype] & (1 << cm->cm_totype)) == 0)
 812                 return (ENODEV);
 813
 814         /*
 815          * Calculate the source and destination elements.
 816          */
 817         fromelem = softc->sc_firsts[cm->cm_fromtype] + cm->cm_fromunit;
 818         toelem = softc->sc_firsts[cm->cm_totype] + cm->cm_tounit;
 819
 820         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
 821
 822         scsi_move_medium(&ccb->csio,
 823                          /* retries */ 1,
 824                          /* cbfcnp */ chdone,
 825                          /* tag_action */ MSG_SIMPLE_Q_TAG,
 826                          /* tea */ softc->sc_picker,
 827                          /* src */ fromelem,
 828                          /* dst */ toelem,
 829                          /* invert */ (cm->cm_flags & CM_INVERT) ? TRUE : FALSE,
 830                          /* sense_len */ SSD_FULL_SIZE,
 831                          /* timeout */ CH_TIMEOUT_MOVE_MEDIUM);
 832
 833         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/CAM_RETRY_SELTO,
 834                                   /*sense_flags*/ SF_RETRY_UA,
 835                                   softc->device_stats);
 836
 837         xpt_release_ccb(ccb);
 838
 839         return(error);
 840 }
 841
 842 static int
 843 chexchange(struct cam_periph *periph, struct changer_exchange *ce)
 844 {
 845         struct ch_softc *softc;
 846         u_int16_t src, dst1, dst2;
 847         union ccb *ccb;
 848         int error;
 849
 850         error = 0;
 851         softc = (struct ch_softc *)periph->softc;
 852         /*
 853          * Check arguments.
 854          */
 855         if ((ce->ce_srctype > CHET_DT) || (ce->ce_fdsttype > CHET_DT) ||
 856             (ce->ce_sdsttype > CHET_DT))
 857                 return (EINVAL);
 858         if ((ce->ce_srcunit > (softc->sc_counts[ce->ce_srctype] - 1)) ||
 859             (ce->ce_fdstunit > (softc->sc_counts[ce->ce_fdsttype] - 1)) ||
 860             (ce->ce_sdstunit > (softc->sc_counts[ce->ce_sdsttype] - 1)))
 861                 return (ENODEV);
 862
 863         /*
 864          * Check the request against the changer's capabilities.
 865          */
 866         if (((softc->sc_exchangemask[ce->ce_srctype] &
 867              (1 << ce->ce_fdsttype)) == 0) ||
 868             ((softc->sc_exchangemask[ce->ce_fdsttype] &
 869              (1 << ce->ce_sdsttype)) == 0))
 870                 return (ENODEV);
 871
 872         /*
 873          * Calculate the source and destination elements.
 874          */
 875         src = softc->sc_firsts[ce->ce_srctype] + ce->ce_srcunit;
 876         dst1 = softc->sc_firsts[ce->ce_fdsttype] + ce->ce_fdstunit;
 877         dst2 = softc->sc_firsts[ce->ce_sdsttype] + ce->ce_sdstunit;
 878
 879         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
 880
 881         scsi_exchange_medium(&ccb->csio,
 882                              /* retries */ 1,
 883                              /* cbfcnp */ chdone,
 884                              /* tag_action */ MSG_SIMPLE_Q_TAG,
 885                              /* tea */ softc->sc_picker,
 886                              /* src */ src,
 887                              /* dst1 */ dst1,
 888                              /* dst2 */ dst2,
 889                              /* invert1 */ (ce->ce_flags & CE_INVERT1) ?
 890                                            TRUE : FALSE,
 891                              /* invert2 */ (ce->ce_flags & CE_INVERT2) ?
 892                                            TRUE : FALSE,
 893                              /* sense_len */ SSD_FULL_SIZE,
 894                              /* timeout */ CH_TIMEOUT_EXCHANGE_MEDIUM);
 895
 896         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/CAM_RETRY_SELTO,
 897                                   /*sense_flags*/ SF_RETRY_UA,
 898                                   softc->device_stats);
 899
 900         xpt_release_ccb(ccb);
 901
 902         return(error);
 903 }
 904
 905 static int
 906 chposition(struct cam_periph *periph, struct changer_position *cp)
 907 {
 908         struct ch_softc *softc;
 909         u_int16_t dst;
 910         union ccb *ccb;
 911         int error;
 912
 913         error = 0;
 914         softc = (struct ch_softc *)periph->softc;
 915
 916         /*
 917          * Check arguments.
 918          */
 919         if (cp->cp_type > CHET_DT)
 920                 return (EINVAL);
 921         if (cp->cp_unit > (softc->sc_counts[cp->cp_type] - 1))
 922                 return (ENODEV);
 923
 924         /*
 925          * Calculate the destination element.
 926          */
 927         dst = softc->sc_firsts[cp->cp_type] + cp->cp_unit;
 928
 929         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
 930
 931         scsi_position_to_element(&ccb->csio,
 932                                  /* retries */ 1,
 933                                  /* cbfcnp */ chdone,
 934                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
 935                                  /* tea */ softc->sc_picker,
 936                                  /* dst */ dst,
 937                                  /* invert */ (cp->cp_flags & CP_INVERT) ?
 938                                               TRUE : FALSE,
 939                                  /* sense_len */ SSD_FULL_SIZE,
 940                                  /* timeout */ CH_TIMEOUT_POSITION_TO_ELEMENT);
 941
 942         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
 943                                   /*sense_flags*/ SF_RETRY_UA,
 944                                   softc->device_stats);
 945
 946         xpt_release_ccb(ccb);
 947
 948         return(error);
 949 }
 950
 951 /*
 952  * Copy a volume tag to a volume_tag struct, converting SCSI byte order
 953  * to host native byte order in the volume serial number.  The volume
 954  * label as returned by the changer is transferred to user mode as
 955  * nul-terminated string.  Volume labels are truncated at the first
 956  * space, as suggested by SCSI-2.
 957  */
 958 static  void
 959 copy_voltag(struct changer_voltag *uvoltag, struct volume_tag *voltag)
 960 {
 961         int i;
 962         for (i=0; i<CH_VOLTAG_MAXLEN; i++) {
 963                 char c = voltag->vif[i];
 964                 if (c && c != ' ')
 965                         uvoltag->cv_volid[i] = c;
 966                 else
 967                         break;
 968         }
 969         uvoltag->cv_serial = scsi_2btoul(voltag->vsn);
 970 }
 971
 972 /*
 973  * Copy an an element status descriptor to a user-mode
 974  * changer_element_status structure.
 975  */
 976
 977 static  void
 978 copy_element_status(struct ch_softc *softc,
 979                     u_int16_t flags,
 980                     struct read_element_status_descriptor *desc,
 981                     struct changer_element_status *ces)
 982 {
 983         u_int16_t eaddr = scsi_2btoul(desc->eaddr);
 984         u_int16_t et;
 985
 986         ces->ces_int_addr = eaddr;
 987         /* set up logical address in element status */
 988         for (et = CHET_MT; et <= CHET_DT; et++) {
 989                 if ((softc->sc_firsts[et] <= eaddr)
 990                     && ((softc->sc_firsts[et] + softc->sc_counts[et])
 991                         > eaddr)) {
 992                         ces->ces_addr = eaddr - softc->sc_firsts[et];
 993                         ces->ces_type = et;
 994                         break;
 995                 }
 996         }
 997
 998         ces->ces_flags = desc->flags1;
 999
1000         ces->ces_sensecode = desc->sense_code;
1001         ces->ces_sensequal = desc->sense_qual;
1002
1003         if (desc->flags2 & READ_ELEMENT_STATUS_INVERT)
1004                 ces->ces_flags |= CES_INVERT;
1005
1006         if (desc->flags2 & READ_ELEMENT_STATUS_SVALID) {
1007
1008                 eaddr = scsi_2btoul(desc->ssea);
1009
1010                 /* convert source address to logical format */
1011                 for (et = CHET_MT; et <= CHET_DT; et++) {
1012                         if ((softc->sc_firsts[et] <= eaddr)
1013                             && ((softc->sc_firsts[et] + softc->sc_counts[et])
1014                                 > eaddr)) {
1015                                 ces->ces_source_addr =
1016                                         eaddr - softc->sc_firsts[et];
1017                                 ces->ces_source_type = et;
1018                                 ces->ces_flags |= CES_SOURCE_VALID;
1019                                 break;
1020                         }
1021                 }
1022
1023                 if (!(ces->ces_flags & CES_SOURCE_VALID))
1024                         printf("ch: warning: could not map element source "
1025                                "address %ud to a valid element type\n",
1026                                eaddr);
1027         }
1028
1029
1030         if (flags & READ_ELEMENT_STATUS_PVOLTAG)
1031                 copy_voltag(&(ces->ces_pvoltag), &(desc->pvoltag));
1032         if (flags & READ_ELEMENT_STATUS_AVOLTAG)
1033                 copy_voltag(&(ces->ces_avoltag), &(desc->avoltag));
1034
1035         if (desc->dt_scsi_flags & READ_ELEMENT_STATUS_DT_IDVALID) {
1036                 ces->ces_flags |= CES_SCSIID_VALID;
1037                 ces->ces_scsi_id = desc->dt_scsi_addr;
1038         }
1039
1040         if (desc->dt_scsi_addr & READ_ELEMENT_STATUS_DT_LUVALID) {
1041                 ces->ces_flags |= CES_LUN_VALID;
1042                 ces->ces_scsi_lun =
1043                         desc->dt_scsi_flags & READ_ELEMENT_STATUS_DT_LUNMASK;
1044         }
1045 }
1046
1047 static int
1048 chgetelemstatus(struct cam_periph *periph,
1049                 struct changer_element_status_request *cesr)
1050 {
1051         struct read_element_status_header *st_hdr;
1052         struct read_element_status_page_header *pg_hdr;
1053         struct read_element_status_descriptor *desc;
1054         caddr_t data = NULL;
1055         size_t size, desclen;
1056         int avail, i, error = 0;
1057         struct changer_element_status *user_data = NULL;
1058         struct ch_softc *softc;
1059         union ccb *ccb;
1060         int chet = cesr->cesr_element_type;
1061         int want_voltags = (cesr->cesr_flags & CESR_VOLTAGS) ? 1 : 0;
1062
1063         softc = (struct ch_softc *)periph->softc;
1064
1065         /* perform argument checking */
1066
1067         /*
1068          * Perform a range check on the cesr_element_{base,count}
1069          * request argument fields.
1070          */
1071         if ((softc->sc_counts[chet] - cesr->cesr_element_base) <= 0
1072             || (cesr->cesr_element_base + cesr->cesr_element_count)
1073                 > softc->sc_counts[chet])
1074                 return (EINVAL);
1075
1076         /*
1077          * Request one descriptor for the given element type.  This
1078          * is used to determine the size of the descriptor so that
1079          * we can allocate enough storage for all of them.  We assume
1080          * that the first one can fit into 1k.
1081          */
1082         cam_periph_unlock(periph);
1083         data = (caddr_t)malloc(1024, M_DEVBUF, M_WAITOK);
1084
1085         cam_periph_lock(periph);
1086         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
1087
1088         scsi_read_element_status(&ccb->csio,
1089                                  /* retries */ 1,
1090                                  /* cbfcnp */ chdone,
1091                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
1092                                  /* voltag */ want_voltags,
1093                                  /* sea */ softc->sc_firsts[chet],
1094                                  /* count */ 1,
1095                                  /* data_ptr */ data,
1096                                  /* dxfer_len */ 1024,
1097                                  /* sense_len */ SSD_FULL_SIZE,
1098                                  /* timeout */ CH_TIMEOUT_READ_ELEMENT_STATUS);
1099
1100         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1101                                   /*sense_flags*/ SF_RETRY_UA,
1102                                   softc->device_stats);
1103
1104         if (error)
1105                 goto done;
1106         cam_periph_unlock(periph);
1107
1108         st_hdr = (struct read_element_status_header *)data;
1109         pg_hdr = (struct read_element_status_page_header *)((uintptr_t)st_hdr +
1110                   sizeof(struct read_element_status_header));
1111         desclen = scsi_2btoul(pg_hdr->edl);
1112
1113         size = sizeof(struct read_element_status_header) +
1114                sizeof(struct read_element_status_page_header) +
1115                (desclen * cesr->cesr_element_count);
1116
1117         /*
1118          * Reallocate storage for descriptors and get them from the
1119          * device.
1120          */
1121         free(data, M_DEVBUF);
1122         data = (caddr_t)malloc(size, M_DEVBUF, M_WAITOK);
1123
1124         cam_periph_lock(periph);
1125         scsi_read_element_status(&ccb->csio,
1126                                  /* retries */ 1,
1127                                  /* cbfcnp */ chdone,
1128                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
1129                                  /* voltag */ want_voltags,
1130                                  /* sea */ softc->sc_firsts[chet]
1131                                  + cesr->cesr_element_base,
1132                                  /* count */ cesr->cesr_element_count,
1133                                  /* data_ptr */ data,
1134                                  /* dxfer_len */ size,
1135                                  /* sense_len */ SSD_FULL_SIZE,
1136                                  /* timeout */ CH_TIMEOUT_READ_ELEMENT_STATUS);
1137
1138         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1139                                   /*sense_flags*/ SF_RETRY_UA,
1140                                   softc->device_stats);
1141
1142         if (error)
1143                 goto done;
1144         cam_periph_unlock(periph);
1145
1146         /*
1147          * Fill in the user status array.
1148          */
1149         st_hdr = (struct read_element_status_header *)data;
1150         pg_hdr = (struct read_element_status_page_header *)((uintptr_t)st_hdr +
1151                   sizeof(struct read_element_status_header));
1152         avail = scsi_2btoul(st_hdr->count);
1153
1154         if (avail != cesr->cesr_element_count) {
1155                 xpt_print(periph->path,
1156                     "warning, READ ELEMENT STATUS avail != count\n");
1157         }
1158
1159         user_data = (struct changer_element_status *)
1160                 malloc(avail * sizeof(struct changer_element_status),
1161                        M_DEVBUF, M_WAITOK | M_ZERO);
1162
1163         desc = (struct read_element_status_descriptor *)((uintptr_t)data +
1164                 sizeof(struct read_element_status_header) +
1165                 sizeof(struct read_element_status_page_header));
1166         /*
1167          * Set up the individual element status structures
1168          */
1169         for (i = 0; i < avail; ++i) {
1170                 struct changer_element_status *ces = &(user_data[i]);
1171
1172                 copy_element_status(softc, pg_hdr->flags, desc, ces);
1173
1174                 desc = (struct read_element_status_descriptor *)
1175                        ((uintptr_t)desc + desclen);
1176         }
1177
1178         /* Copy element status structures out to userspace. */
1179         error = copyout(user_data,
1180                         cesr->cesr_element_status,
1181                         avail * sizeof(struct changer_element_status));
1182         cam_periph_lock(periph);
1183
1184  done:
1185         xpt_release_ccb(ccb);
1186
1187         if (data != NULL)
1188                 free(data, M_DEVBUF);
1189         if (user_data != NULL)
1190                 free(user_data, M_DEVBUF);
1191
1192         return (error);
1193 }
1194
1195 static int
1196 chielem(struct cam_periph *periph,
1197         unsigned int timeout)
1198 {
1199         union ccb *ccb;
1200         struct ch_softc *softc;
1201         int error;
1202
1203         if (!timeout) {
1204                 timeout = CH_TIMEOUT_INITIALIZE_ELEMENT_STATUS;
1205         } else {
1206                 timeout *= 1000;
1207         }
1208
1209         error = 0;
1210         softc = (struct ch_softc *)periph->softc;
1211
1212         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
1213
1214         scsi_initialize_element_status(&ccb->csio,
1215                                       /* retries */ 1,
1216                                       /* cbfcnp */ chdone,
1217                                       /* tag_action */ MSG_SIMPLE_Q_TAG,
1218                                       /* sense_len */ SSD_FULL_SIZE,
1219                                       /* timeout */ timeout);
1220
1221         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1222                                   /*sense_flags*/ SF_RETRY_UA,
1223                                   softc->device_stats);
1224
1225         xpt_release_ccb(ccb);
1226
1227         return(error);
1228 }
1229
1230 static int
1231 chsetvoltag(struct cam_periph *periph,
1232             struct changer_set_voltag_request *csvr)
1233 {
1234         union ccb *ccb;
1235         struct ch_softc *softc;
1236         u_int16_t ea;
1237         u_int8_t sac;
1238         struct scsi_send_volume_tag_parameters ssvtp;
1239         int error;
1240         int i;
1241
1242         error = 0;
1243         softc = (struct ch_softc *)periph->softc;
1244
1245         bzero(&ssvtp, sizeof(ssvtp));
1246         for (i=0; i<sizeof(ssvtp.vitf); i++) {
1247                 ssvtp.vitf[i] = ' ';
1248         }
1249
1250         /*
1251          * Check arguments.
1252          */
1253         if (csvr->csvr_type > CHET_DT)
1254                 return EINVAL;
1255         if (csvr->csvr_addr > (softc->sc_counts[csvr->csvr_type] - 1))
1256                 return ENODEV;
1257
1258         ea = softc->sc_firsts[csvr->csvr_type] + csvr->csvr_addr;
1259
1260         if (csvr->csvr_flags & CSVR_ALTERNATE) {
1261                 switch (csvr->csvr_flags & CSVR_MODE_MASK) {
1262                 case CSVR_MODE_SET:
1263                         sac = SEND_VOLUME_TAG_ASSERT_ALTERNATE;
1264                         break;
1265                 case CSVR_MODE_REPLACE:
1266                         sac = SEND_VOLUME_TAG_REPLACE_ALTERNATE;
1267                         break;
1268                 case CSVR_MODE_CLEAR:
1269                         sac = SEND_VOLUME_TAG_UNDEFINED_ALTERNATE;
1270                         break;
1271                 default:
1272                         error = EINVAL;
1273                         goto out;
1274                 }
1275         } else {
1276                 switch (csvr->csvr_flags & CSVR_MODE_MASK) {
1277                 case CSVR_MODE_SET:
1278                         sac = SEND_VOLUME_TAG_ASSERT_PRIMARY;
1279                         break;
1280                 case CSVR_MODE_REPLACE:
1281                         sac = SEND_VOLUME_TAG_REPLACE_PRIMARY;
1282                         break;
1283                 case CSVR_MODE_CLEAR:
1284                         sac = SEND_VOLUME_TAG_UNDEFINED_PRIMARY;
1285                         break;
1286                 default:
1287                         error = EINVAL;
1288                         goto out;
1289                 }
1290         }
1291
1292         memcpy(ssvtp.vitf, csvr->csvr_voltag.cv_volid,
1293                min(strlen(csvr->csvr_voltag.cv_volid), sizeof(ssvtp.vitf)));
1294         scsi_ulto2b(csvr->csvr_voltag.cv_serial, ssvtp.minvsn);
1295
1296         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
1297
1298         scsi_send_volume_tag(&ccb->csio,
1299                              /* retries */ 1,
1300                              /* cbfcnp */ chdone,
1301                              /* tag_action */ MSG_SIMPLE_Q_TAG,
1302                              /* element_address */ ea,
1303                              /* send_action_code */ sac,
1304                              /* parameters */ &ssvtp,
1305                              /* sense_len */ SSD_FULL_SIZE,
1306                              /* timeout */ CH_TIMEOUT_SEND_VOLTAG);
1307
1308         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1309                                   /*sense_flags*/ SF_RETRY_UA,
1310                                   softc->device_stats);
1311
1312         xpt_release_ccb(ccb);
1313
1314  out:
1315         return error;
1316 }
1317
1318 static int
1319 chgetparams(struct cam_periph *periph)
1320 {
1321         union ccb *ccb;
1322         struct ch_softc *softc;
1323         void *mode_buffer;
1324         int mode_buffer_len;
1325         struct page_element_address_assignment *ea;
1326         struct page_device_capabilities *cap;
1327         int error, from, dbd;
1328         u_int8_t *moves, *exchanges;
1329
1330         error = 0;
1331
1332         softc = (struct ch_softc *)periph->softc;
1333
1334         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
1335
1336         /*
1337          * The scsi_mode_sense_data structure is just a convenience
1338          * structure that allows us to easily calculate the worst-case
1339          * storage size of the mode sense buffer.
1340          */
1341         mode_buffer_len = sizeof(struct scsi_mode_sense_data);
1342
1343         mode_buffer = malloc(mode_buffer_len, M_SCSICH, M_NOWAIT);
1344
1345         if (mode_buffer == NULL) {
1346                 printf("chgetparams: couldn't malloc mode sense data\n");
1347                 return(ENOSPC);
1348         }
1349
1350         bzero(mode_buffer, mode_buffer_len);
1351
1352         if (softc->quirks & CH_Q_NO_DBD)
1353                 dbd = FALSE;
1354         else
1355                 dbd = TRUE;
1356
1357         /*
1358          * Get the element address assignment page.
1359          */
1360         scsi_mode_sense(&ccb->csio,
1361                         /* retries */ 1,
1362                         /* cbfcnp */ chdone,
1363                         /* tag_action */ MSG_SIMPLE_Q_TAG,
1364                         /* dbd */ dbd,
1365                         /* page_code */ SMS_PAGE_CTRL_CURRENT,
1366                         /* page */ CH_ELEMENT_ADDR_ASSIGN_PAGE,
1367                         /* param_buf */ (u_int8_t *)mode_buffer,
1368                         /* param_len */ mode_buffer_len,
1369                         /* sense_len */ SSD_FULL_SIZE,
1370                         /* timeout */ CH_TIMEOUT_MODE_SENSE);
1371
1372         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1373                                   /* sense_flags */ SF_RETRY_UA|SF_NO_PRINT,
1374                                   softc->device_stats);
1375
1376         if (error) {
1377                 if (dbd) {
1378                         struct scsi_mode_sense_6 *sms;
1379
1380                         sms = (struct scsi_mode_sense_6 *)
1381                                 ccb->csio.cdb_io.cdb_bytes;
1382
1383                         sms->byte2 &= ~SMS_DBD;
1384                         error = cam_periph_runccb(ccb, cherror,
1385                                                   /*cam_flags*/ CAM_RETRY_SELTO,
1386                                                   /*sense_flags*/ SF_RETRY_UA,
1387                                                   softc->device_stats);
1388                 } else {
1389                         /*
1390                          * Since we disabled sense printing above, print
1391                          * out the sense here since we got an error.
1392                          */
1393                         scsi_sense_print(&ccb->csio);
1394                 }
1395
1396                 if (error) {
1397                         xpt_print(periph->path,
1398                             "chgetparams: error getting element "
1399                             "address page\n");
1400                         xpt_release_ccb(ccb);
1401                         free(mode_buffer, M_SCSICH);
1402                         return(error);
1403                 }
1404         }
1405
1406         ea = (struct page_element_address_assignment *)
1407                 find_mode_page_6((struct scsi_mode_header_6 *)mode_buffer);
1408
1409         softc->sc_firsts[CHET_MT] = scsi_2btoul(ea->mtea);
1410         softc->sc_counts[CHET_MT] = scsi_2btoul(ea->nmte);
1411         softc->sc_firsts[CHET_ST] = scsi_2btoul(ea->fsea);
1412         softc->sc_counts[CHET_ST] = scsi_2btoul(ea->nse);
1413         softc->sc_firsts[CHET_IE] = scsi_2btoul(ea->fieea);
1414         softc->sc_counts[CHET_IE] = scsi_2btoul(ea->niee);
1415         softc->sc_firsts[CHET_DT] = scsi_2btoul(ea->fdtea);
1416         softc->sc_counts[CHET_DT] = scsi_2btoul(ea->ndte);
1417
1418         bzero(mode_buffer, mode_buffer_len);
1419
1420         /*
1421          * Now get the device capabilities page.
1422          */
1423         scsi_mode_sense(&ccb->csio,
1424                         /* retries */ 1,
1425                         /* cbfcnp */ chdone,
1426                         /* tag_action */ MSG_SIMPLE_Q_TAG,
1427                         /* dbd */ dbd,
1428                         /* page_code */ SMS_PAGE_CTRL_CURRENT,
1429                         /* page */ CH_DEVICE_CAP_PAGE,
1430                         /* param_buf */ (u_int8_t *)mode_buffer,
1431                         /* param_len */ mode_buffer_len,
1432                         /* sense_len */ SSD_FULL_SIZE,
1433                         /* timeout */ CH_TIMEOUT_MODE_SENSE);
1434
1435         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1436                                   /* sense_flags */ SF_RETRY_UA | SF_NO_PRINT,
1437                                   softc->device_stats);
1438
1439         if (error) {
1440                 if (dbd) {
1441                         struct scsi_mode_sense_6 *sms;
1442
1443                         sms = (struct scsi_mode_sense_6 *)
1444                                 ccb->csio.cdb_io.cdb_bytes;
1445
1446                         sms->byte2 &= ~SMS_DBD;
1447                         error = cam_periph_runccb(ccb, cherror,
1448                                                   /*cam_flags*/ CAM_RETRY_SELTO,
1449                                                   /*sense_flags*/ SF_RETRY_UA,
1450                                                   softc->device_stats);
1451                 } else {
1452                         /*
1453                          * Since we disabled sense printing above, print
1454                          * out the sense here since we got an error.
1455                          */
1456                         scsi_sense_print(&ccb->csio);
1457                 }
1458
1459                 if (error) {
1460                         xpt_print(periph->path,
1461                             "chgetparams: error getting device "
1462                             "capabilities page\n");
1463                         xpt_release_ccb(ccb);
1464                         free(mode_buffer, M_SCSICH);
1465                         return(error);
1466                 }
1467         }
1468
1469         xpt_release_ccb(ccb);
1470
1471         cap = (struct page_device_capabilities *)
1472                 find_mode_page_6((struct scsi_mode_header_6 *)mode_buffer);
1473
1474         bzero(softc->sc_movemask, sizeof(softc->sc_movemask));
1475         bzero(softc->sc_exchangemask, sizeof(softc->sc_exchangemask));
1476         moves = cap->move_from;
1477         exchanges = cap->exchange_with;
1478         for (from = CHET_MT; from <= CHET_MAX; ++from) {
1479                 softc->sc_movemask[from] = moves[from];
1480                 softc->sc_exchangemask[from] = exchanges[from];
1481         }
1482
1483         free(mode_buffer, M_SCSICH);
1484
1485         return(error);
1486 }
1487
1488 void
1489 scsi_move_medium(struct ccb_scsiio *csio, u_int32_t retries,
1490                  void (*cbfcnp)(struct cam_periph *, union ccb *),
1491                  u_int8_t tag_action, u_int32_t tea, u_int32_t src,
1492                  u_int32_t dst, int invert, u_int8_t sense_len,
1493                  u_int32_t timeout)
1494 {
1495         struct scsi_move_medium *scsi_cmd;
1496
1497         scsi_cmd = (struct scsi_move_medium *)&csio->cdb_io.cdb_bytes;
1498         bzero(scsi_cmd, sizeof(*scsi_cmd));
1499
1500         scsi_cmd->opcode = MOVE_MEDIUM;
1501
1502         scsi_ulto2b(tea, scsi_cmd->tea);
1503         scsi_ulto2b(src, scsi_cmd->src);
1504         scsi_ulto2b(dst, scsi_cmd->dst);
1505
1506         if (invert)
1507                 scsi_cmd->invert |= MOVE_MEDIUM_INVERT;
1508
1509         cam_fill_csio(csio,
1510                       retries,
1511                       cbfcnp,
1512                       /*flags*/ CAM_DIR_NONE,
1513                       tag_action,
1514                       /*data_ptr*/ NULL,
1515                       /*dxfer_len*/ 0,
1516                       sense_len,
1517                       sizeof(*scsi_cmd),
1518                       timeout);
1519 }
1520
1521 void
1522 scsi_exchange_medium(struct ccb_scsiio *csio, u_int32_t retries,
1523                      void (*cbfcnp)(struct cam_periph *, union ccb *),
1524                      u_int8_t tag_action, u_int32_t tea, u_int32_t src,
1525                      u_int32_t dst1, u_int32_t dst2, int invert1,
1526                      int invert2, u_int8_t sense_len, u_int32_t timeout)
1527 {
1528         struct scsi_exchange_medium *scsi_cmd;
1529
1530         scsi_cmd = (struct scsi_exchange_medium *)&csio->cdb_io.cdb_bytes;
1531         bzero(scsi_cmd, sizeof(*scsi_cmd));
1532
1533         scsi_cmd->opcode = EXCHANGE_MEDIUM;
1534
1535         scsi_ulto2b(tea, scsi_cmd->tea);
1536         scsi_ulto2b(src, scsi_cmd->src);
1537         scsi_ulto2b(dst1, scsi_cmd->fdst);
1538         scsi_ulto2b(dst2, scsi_cmd->sdst);
1539
1540         if (invert1)
1541                 scsi_cmd->invert |= EXCHANGE_MEDIUM_INV1;
1542
1543         if (invert2)
1544                 scsi_cmd->invert |= EXCHANGE_MEDIUM_INV2;
1545
1546         cam_fill_csio(csio,
1547                       retries,
1548                       cbfcnp,
1549                       /*flags*/ CAM_DIR_NONE,
1550                       tag_action,
1551                       /*data_ptr*/ NULL,
1552                       /*dxfer_len*/ 0,
1553                       sense_len,
1554                       sizeof(*scsi_cmd),
1555                       timeout);
1556 }
1557
1558 void
1559 scsi_position_to_element(struct ccb_scsiio *csio, u_int32_t retries,
1560                          void (*cbfcnp)(struct cam_periph *, union ccb *),
1561                          u_int8_t tag_action, u_int32_t tea, u_int32_t dst,
1562                          int invert, u_int8_t sense_len, u_int32_t timeout)
1563 {
1564         struct scsi_position_to_element *scsi_cmd;
1565
1566         scsi_cmd = (struct scsi_position_to_element *)&csio->cdb_io.cdb_bytes;
1567         bzero(scsi_cmd, sizeof(*scsi_cmd));
1568
1569         scsi_cmd->opcode = POSITION_TO_ELEMENT;
1570
1571         scsi_ulto2b(tea, scsi_cmd->tea);
1572         scsi_ulto2b(dst, scsi_cmd->dst);
1573
1574         if (invert)
1575                 scsi_cmd->invert |= POSITION_TO_ELEMENT_INVERT;
1576
1577         cam_fill_csio(csio,
1578                       retries,
1579                       cbfcnp,
1580                       /*flags*/ CAM_DIR_NONE,
1581                       tag_action,
1582                       /*data_ptr*/ NULL,
1583                       /*dxfer_len*/ 0,
1584                       sense_len,
1585                       sizeof(*scsi_cmd),
1586                       timeout);
1587 }
1588
1589 void
1590 scsi_read_element_status(struct ccb_scsiio *csio, u_int32_t retries,
1591                          void (*cbfcnp)(struct cam_periph *, union ccb *),
1592                          u_int8_t tag_action, int voltag, u_int32_t sea,
1593                          u_int32_t count, u_int8_t *data_ptr,
1594                          u_int32_t dxfer_len, u_int8_t sense_len,
1595                          u_int32_t timeout)
1596 {
1597         struct scsi_read_element_status *scsi_cmd;
1598
1599         scsi_cmd = (struct scsi_read_element_status *)&csio->cdb_io.cdb_bytes;
1600         bzero(scsi_cmd, sizeof(*scsi_cmd));
1601
1602         scsi_cmd->opcode = READ_ELEMENT_STATUS;
1603
1604         scsi_ulto2b(sea, scsi_cmd->sea);
1605         scsi_ulto2b(count, scsi_cmd->count);
1606         scsi_ulto3b(dxfer_len, scsi_cmd->len);
1607
1608         if (voltag)
1609                 scsi_cmd->byte2 |= READ_ELEMENT_STATUS_VOLTAG;
1610
1611         cam_fill_csio(csio,
1612                       retries,
1613                       cbfcnp,
1614                       /*flags*/ CAM_DIR_IN,
1615                       tag_action,
1616                       data_ptr,
1617                       dxfer_len,
1618                       sense_len,
1619                       sizeof(*scsi_cmd),
1620                       timeout);
1621 }
1622
1623 void
1624 scsi_initialize_element_status(struct ccb_scsiio *csio, u_int32_t retries,
1625                                void (*cbfcnp)(struct cam_periph *, union ccb *),
1626                                u_int8_t tag_action, u_int8_t sense_len,
1627                                u_int32_t timeout)
1628 {
1629         struct scsi_initialize_element_status *scsi_cmd;
1630
1631         scsi_cmd = (struct scsi_initialize_element_status *)
1632                     &csio->cdb_io.cdb_bytes;
1633         bzero(scsi_cmd, sizeof(*scsi_cmd));
1634
1635         scsi_cmd->opcode = INITIALIZE_ELEMENT_STATUS;
1636
1637         cam_fill_csio(csio,
1638                       retries,
1639                       cbfcnp,
1640                       /*flags*/ CAM_DIR_NONE,
1641                       tag_action,
1642                       /* data_ptr */ NULL,
1643                       /* dxfer_len */ 0,
1644                       sense_len,
1645                       sizeof(*scsi_cmd),
1646                       timeout);
1647 }
1648
1649 void
1650 scsi_send_volume_tag(struct ccb_scsiio *csio, u_int32_t retries,
1651                      void (*cbfcnp)(struct cam_periph *, union ccb *),
1652                      u_int8_t tag_action,
1653                      u_int16_t element_address,
1654                      u_int8_t send_action_code,
1655                      struct scsi_send_volume_tag_parameters *parameters,
1656                      u_int8_t sense_len, u_int32_t timeout)
1657 {
1658         struct scsi_send_volume_tag *scsi_cmd;
1659
1660         scsi_cmd = (struct scsi_send_volume_tag *) &csio->cdb_io.cdb_bytes;
1661         bzero(scsi_cmd, sizeof(*scsi_cmd));
1662
1663         scsi_cmd->opcode = SEND_VOLUME_TAG;
1664         scsi_ulto2b(element_address, scsi_cmd->ea);
1665         scsi_cmd->sac = send_action_code;
1666         scsi_ulto2b(sizeof(*parameters), scsi_cmd->pll);
1667
1668         cam_fill_csio(csio,
1669                       retries,
1670                       cbfcnp,
1671                       /*flags*/ CAM_DIR_OUT,
1672                       tag_action,
1673                       /* data_ptr */ (u_int8_t *) parameters,
1674                       sizeof(*parameters),
1675                       sense_len,
1676                       sizeof(*scsi_cmd),
1677                       timeout);
1678 }