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
 326         cgd = (struct ccb_getdev *)arg;
 327         if (periph == NULL) {
 328                 printf("chregister: periph was NULL!!\n");
 329                 return(CAM_REQ_CMP_ERR);
 330         }
 331
 332         if (cgd == NULL) {
 333                 printf("chregister: no getdev CCB, can't register device\n");
 334                 return(CAM_REQ_CMP_ERR);
 335         }
 336
 337         softc = (struct ch_softc *)malloc(sizeof(*softc),M_DEVBUF,M_NOWAIT);
 338
 339         if (softc == NULL) {
 340                 printf("chregister: Unable to probe new device. "
 341                        "Unable to allocate softc\n");
 342                 return(CAM_REQ_CMP_ERR);
 343         }
 344
 345         bzero(softc, sizeof(*softc));
 346         softc->state = CH_STATE_PROBE;
 347         periph->softc = softc;
 348         softc->quirks = CH_Q_NONE;
 349
 350         /*
 351          * Changers don't have a blocksize, and obviously don't support
 352          * tagged queueing.
 353          */
 354         cam_periph_unlock(periph);
 355         softc->device_stats = devstat_new_entry("ch",
 356                           periph->unit_number, 0,
 357                           DEVSTAT_NO_BLOCKSIZE | DEVSTAT_NO_ORDERED_TAGS,
 358                           SID_TYPE(&cgd->inq_data)| DEVSTAT_TYPE_IF_SCSI,
 359                           DEVSTAT_PRIORITY_OTHER);
 360
 361         /* Register the device */
 362         softc->dev = make_dev(&ch_cdevsw, periph->unit_number, UID_ROOT,
 363                               GID_OPERATOR, 0600, "%s%d", periph->periph_name,
 364                               periph->unit_number);
 365         cam_periph_lock(periph);
 366         softc->dev->si_drv1 = periph;
 367
 368         /*
 369          * Add an async callback so that we get
 370          * notified if this device goes away.
 371          */
 372         xpt_register_async(AC_LOST_DEVICE, chasync, periph, periph->path);
 373
 374         /*
 375          * Lock this periph until we are setup.
 376          * This first call can't block
 377          */
 378         (void)cam_periph_hold(periph, PRIBIO);
 379         xpt_schedule(periph, /*priority*/5);
 380
 381         return(CAM_REQ_CMP);
 382 }
 383
 384 static int
 385 chopen(struct cdev *dev, int flags, int fmt, struct thread *td)
 386 {
 387         struct cam_periph *periph;
 388         struct ch_softc *softc;
 389         int error;
 390
 391         periph = (struct cam_periph *)dev->si_drv1;
 392         if (cam_periph_acquire(periph) != CAM_REQ_CMP)
 393                 return (ENXIO);
 394
 395         softc = (struct ch_softc *)periph->softc;
 396
 397         cam_periph_lock(periph);
 398
 399         if (softc->flags & CH_FLAG_INVALID) {
 400                 cam_periph_unlock(periph);
 401                 cam_periph_release(periph);
 402                 return(ENXIO);
 403         }
 404
 405         if ((softc->flags & CH_FLAG_OPEN) == 0)
 406                 softc->flags |= CH_FLAG_OPEN;
 407         else
 408                 cam_periph_release(periph);
 409
 410         if ((error = cam_periph_hold(periph, PRIBIO | PCATCH)) != 0) {
 411                 cam_periph_unlock(periph);
 412                 cam_periph_release(periph);
 413                 return (error);
 414         }
 415
 416         /*
 417          * Load information about this changer device into the softc.
 418          */
 419         if ((error = chgetparams(periph)) != 0) {
 420                 softc->flags &= ~CH_FLAG_OPEN;
 421                 cam_periph_unlock(periph);
 422                 cam_periph_release(periph);
 423                 return(error);
 424         }
 425
 426         cam_periph_unhold(periph);
 427         cam_periph_unlock(periph);
 428
 429         return(error);
 430 }
 431
 432 static int
 433 chclose(struct cdev *dev, int flag, int fmt, struct thread *td)
 434 {
 435         struct  cam_periph *periph;
 436         struct  ch_softc *softc;
 437         int     error;
 438
 439         error = 0;
 440
 441         periph = (struct cam_periph *)dev->si_drv1;
 442         if (periph == NULL)
 443                 return(ENXIO);
 444
 445         softc = (struct ch_softc *)periph->softc;
 446
 447         cam_periph_lock(periph);
 448
 449         softc->flags &= ~CH_FLAG_OPEN;
 450
 451         cam_periph_unlock(periph);
 452         cam_periph_release(periph);
 453
 454         return(0);
 455 }
 456
 457 static void
 458 chstart(struct cam_periph *periph, union ccb *start_ccb)
 459 {
 460         struct ch_softc *softc;
 461
 462         softc = (struct ch_softc *)periph->softc;
 463
 464         switch (softc->state) {
 465         case CH_STATE_NORMAL:
 466         {
 467                 if (periph->immediate_priority <= periph->pinfo.priority){
 468                         start_ccb->ccb_h.ccb_state = CH_CCB_WAITING;
 469
 470                         SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
 471                                           periph_links.sle);
 472                         periph->immediate_priority = CAM_PRIORITY_NONE;
 473                         wakeup(&periph->ccb_list);
 474                 }
 475                 break;
 476         }
 477         case CH_STATE_PROBE:
 478         {
 479                 int mode_buffer_len;
 480                 void *mode_buffer;
 481
 482                 /*
 483                  * Include the block descriptor when calculating the mode
 484                  * buffer length,
 485                  */
 486                 mode_buffer_len = sizeof(struct scsi_mode_header_6) +
 487                                   sizeof(struct scsi_mode_blk_desc) +
 488                                  sizeof(struct page_element_address_assignment);
 489
 490                 mode_buffer = malloc(mode_buffer_len, M_SCSICH, M_NOWAIT);
 491
 492                 if (mode_buffer == NULL) {
 493                         printf("chstart: couldn't malloc mode sense data\n");
 494                         break;
 495                 }
 496                 bzero(mode_buffer, mode_buffer_len);
 497
 498                 /*
 499                  * Get the element address assignment page.
 500                  */
 501                 scsi_mode_sense(&start_ccb->csio,
 502                                 /* retries */ 1,
 503                                 /* cbfcnp */ chdone,
 504                                 /* tag_action */ MSG_SIMPLE_Q_TAG,
 505                                 /* dbd */ (softc->quirks & CH_Q_NO_DBD) ?
 506                                         FALSE : TRUE,
 507                                 /* page_code */ SMS_PAGE_CTRL_CURRENT,
 508                                 /* page */ CH_ELEMENT_ADDR_ASSIGN_PAGE,
 509                                 /* param_buf */ (u_int8_t *)mode_buffer,
 510                                 /* param_len */ mode_buffer_len,
 511                                 /* sense_len */ SSD_FULL_SIZE,
 512                                 /* timeout */ CH_TIMEOUT_MODE_SENSE);
 513
 514                 start_ccb->ccb_h.ccb_bp = NULL;
 515                 start_ccb->ccb_h.ccb_state = CH_CCB_PROBE;
 516                 xpt_action(start_ccb);
 517                 break;
 518         }
 519         }
 520 }
 521
 522 static void
 523 chdone(struct cam_periph *periph, union ccb *done_ccb)
 524 {
 525         struct ch_softc *softc;
 526         struct ccb_scsiio *csio;
 527
 528         softc = (struct ch_softc *)periph->softc;
 529         csio = &done_ccb->csio;
 530
 531         switch(done_ccb->ccb_h.ccb_state) {
 532         case CH_CCB_PROBE:
 533         {
 534                 struct scsi_mode_header_6 *mode_header;
 535                 struct page_element_address_assignment *ea;
 536                 char announce_buf[80];
 537
 538
 539                 mode_header = (struct scsi_mode_header_6 *)csio->data_ptr;
 540
 541                 ea = (struct page_element_address_assignment *)
 542                         find_mode_page_6(mode_header);
 543
 544                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP){
 545
 546                         softc->sc_firsts[CHET_MT] = scsi_2btoul(ea->mtea);
 547                         softc->sc_counts[CHET_MT] = scsi_2btoul(ea->nmte);
 548                         softc->sc_firsts[CHET_ST] = scsi_2btoul(ea->fsea);
 549                         softc->sc_counts[CHET_ST] = scsi_2btoul(ea->nse);
 550                         softc->sc_firsts[CHET_IE] = scsi_2btoul(ea->fieea);
 551                         softc->sc_counts[CHET_IE] = scsi_2btoul(ea->niee);
 552                         softc->sc_firsts[CHET_DT] = scsi_2btoul(ea->fdtea);
 553                         softc->sc_counts[CHET_DT] = scsi_2btoul(ea->ndte);
 554                         softc->sc_picker = softc->sc_firsts[CHET_MT];
 555
 556 #define PLURAL(c)       (c) == 1 ? "" : "s"
 557                         snprintf(announce_buf, sizeof(announce_buf),
 558                                 "%d slot%s, %d drive%s, "
 559                                 "%d picker%s, %d portal%s",
 560                                 softc->sc_counts[CHET_ST],
 561                                 PLURAL(softc->sc_counts[CHET_ST]),
 562                                 softc->sc_counts[CHET_DT],
 563                                 PLURAL(softc->sc_counts[CHET_DT]),
 564                                 softc->sc_counts[CHET_MT],
 565                                 PLURAL(softc->sc_counts[CHET_MT]),
 566                                 softc->sc_counts[CHET_IE],
 567                                 PLURAL(softc->sc_counts[CHET_IE]));
 568 #undef PLURAL
 569                 } else {
 570                         int error;
 571
 572                         error = cherror(done_ccb, CAM_RETRY_SELTO,
 573                                         SF_RETRY_UA | SF_NO_PRINT);
 574                         /*
 575                          * Retry any UNIT ATTENTION type errors.  They
 576                          * are expected at boot.
 577                          */
 578                         if (error == ERESTART) {
 579                                 /*
 580                                  * A retry was scheuled, so
 581                                  * just return.
 582                                  */
 583                                 return;
 584                         } else if (error != 0) {
 585                                 int retry_scheduled;
 586                                 struct scsi_mode_sense_6 *sms;
 587
 588                                 sms = (struct scsi_mode_sense_6 *)
 589                                         done_ccb->csio.cdb_io.cdb_bytes;
 590
 591                                 /*
 592                                  * Check to see if block descriptors were
 593                                  * disabled.  Some devices don't like that.
 594                                  * We're taking advantage of the fact that
 595                                  * the first few bytes of the 6 and 10 byte
 596                                  * mode sense commands are the same.  If
 597                                  * block descriptors were disabled, enable
 598                                  * them and re-send the command.
 599                                  */
 600                                 if (sms->byte2 & SMS_DBD) {
 601                                         sms->byte2 &= ~SMS_DBD;
 602                                         xpt_action(done_ccb);
 603                                         softc->quirks |= CH_Q_NO_DBD;
 604                                         retry_scheduled = 1;
 605                                 } else
 606                                         retry_scheduled = 0;
 607
 608                                 /* Don't wedge this device's queue */
 609                                 cam_release_devq(done_ccb->ccb_h.path,
 610                                                  /*relsim_flags*/0,
 611                                                  /*reduction*/0,
 612                                                  /*timeout*/0,
 613                                                  /*getcount_only*/0);
 614
 615                                 if (retry_scheduled)
 616                                         return;
 617
 618                                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK)
 619                                     == CAM_SCSI_STATUS_ERROR)
 620                                         scsi_sense_print(&done_ccb->csio);
 621                                 else {
 622                                         xpt_print(periph->path,
 623                                             "got CAM status %#x\n",
 624                                             done_ccb->ccb_h.status);
 625                                 }
 626                                 xpt_print(periph->path, "fatal error, failed "
 627                                     "to attach to device\n");
 628
 629                                 cam_periph_invalidate(periph);
 630
 631                                 announce_buf[0] = '\0';
 632                         }
 633                 }
 634                 if (announce_buf[0] != '\0')
 635                         xpt_announce_periph(periph, announce_buf);
 636                 softc->state = CH_STATE_NORMAL;
 637                 free(mode_header, M_SCSICH);
 638                 /*
 639                  * Since our peripheral may be invalidated by an error
 640                  * above or an external event, we must release our CCB
 641                  * before releasing the probe lock on the peripheral.
 642                  * The peripheral will only go away once the last lock
 643                  * is removed, and we need it around for the CCB release
 644                  * operation.
 645                  */
 646                 xpt_release_ccb(done_ccb);
 647                 cam_periph_unhold(periph);
 648                 return;
 649         }
 650         case CH_CCB_WAITING:
 651         {
 652                 /* Caller will release the CCB */
 653                 wakeup(&done_ccb->ccb_h.cbfcnp);
 654                 return;
 655         }
 656         default:
 657                 break;
 658         }
 659         xpt_release_ccb(done_ccb);
 660 }
 661
 662 static int
 663 cherror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
 664 {
 665         struct ch_softc *softc;
 666         struct cam_periph *periph;
 667
 668         periph = xpt_path_periph(ccb->ccb_h.path);
 669         softc = (struct ch_softc *)periph->softc;
 670
 671         return (cam_periph_error(ccb, cam_flags, sense_flags,
 672                                  &softc->saved_ccb));
 673 }
 674
 675 static int
 676 chioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 677 {
 678         struct cam_periph *periph;
 679         struct ch_softc *softc;
 680         int error;
 681
 682         periph = (struct cam_periph *)dev->si_drv1;
 683         if (periph == NULL)
 684                 return(ENXIO);
 685
 686         cam_periph_lock(periph);
 687         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering chioctl\n"));
 688
 689         softc = (struct ch_softc *)periph->softc;
 690
 691         error = 0;
 692
 693         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
 694                   ("trying to do ioctl %#lx\n", cmd));
 695
 696         /*
 697          * If this command can change the device's state, we must
 698          * have the device open for writing.
 699          */
 700         switch (cmd) {
 701         case CHIOGPICKER:
 702         case CHIOGPARAMS:
 703         case CHIOGSTATUS:
 704                 break;
 705
 706         default:
 707                 if ((flag & FWRITE) == 0) {
 708                         cam_periph_unlock(periph);
 709                         return (EBADF);
 710                 }
 711         }
 712
 713         switch (cmd) {
 714         case CHIOMOVE:
 715                 error = chmove(periph, (struct changer_move *)addr);
 716                 break;
 717
 718         case CHIOEXCHANGE:
 719                 error = chexchange(periph, (struct changer_exchange *)addr);
 720                 break;
 721
 722         case CHIOPOSITION:
 723                 error = chposition(periph, (struct changer_position *)addr);
 724                 break;
 725
 726         case CHIOGPICKER:
 727                 *(int *)addr = softc->sc_picker - softc->sc_firsts[CHET_MT];
 728                 break;
 729
 730         case CHIOSPICKER:
 731         {
 732                 int new_picker = *(int *)addr;
 733
 734                 if (new_picker > (softc->sc_counts[CHET_MT] - 1)) {
 735                         error = EINVAL;
 736                         break;
 737                 }
 738                 softc->sc_picker = softc->sc_firsts[CHET_MT] + new_picker;
 739                 break;
 740         }
 741         case CHIOGPARAMS:
 742         {
 743                 struct changer_params *cp = (struct changer_params *)addr;
 744
 745                 cp->cp_npickers = softc->sc_counts[CHET_MT];
 746                 cp->cp_nslots = softc->sc_counts[CHET_ST];
 747                 cp->cp_nportals = softc->sc_counts[CHET_IE];
 748                 cp->cp_ndrives = softc->sc_counts[CHET_DT];
 749                 break;
 750         }
 751         case CHIOIELEM:
 752                 error = chielem(periph, *(unsigned int *)addr);
 753                 break;
 754
 755         case CHIOGSTATUS:
 756         {
 757                 error = chgetelemstatus(periph,
 758                                (struct changer_element_status_request *) addr);
 759                 break;
 760         }
 761
 762         case CHIOSETVOLTAG:
 763         {
 764                 error = chsetvoltag(periph,
 765                                     (struct changer_set_voltag_request *) addr);
 766                 break;
 767         }
 768
 769         /* Implement prevent/allow? */
 770
 771         default:
 772                 error = cam_periph_ioctl(periph, cmd, addr, cherror);
 773                 break;
 774         }
 775
 776         cam_periph_unlock(periph);
 777         return (error);
 778 }
 779
 780 static int
 781 chmove(struct cam_periph *periph, struct changer_move *cm)
 782 {
 783         struct ch_softc *softc;
 784         u_int16_t fromelem, toelem;
 785         union ccb *ccb;
 786         int error;
 787
 788         error = 0;
 789         softc = (struct ch_softc *)periph->softc;
 790
 791         /*
 792          * Check arguments.
 793          */
 794         if ((cm->cm_fromtype > CHET_DT) || (cm->cm_totype > CHET_DT))
 795                 return (EINVAL);
 796         if ((cm->cm_fromunit > (softc->sc_counts[cm->cm_fromtype] - 1)) ||
 797             (cm->cm_tounit > (softc->sc_counts[cm->cm_totype] - 1)))
 798                 return (ENODEV);
 799
 800         /*
 801          * Check the request against the changer's capabilities.
 802          */
 803         if ((softc->sc_movemask[cm->cm_fromtype] & (1 << cm->cm_totype)) == 0)
 804                 return (ENODEV);
 805
 806         /*
 807          * Calculate the source and destination elements.
 808          */
 809         fromelem = softc->sc_firsts[cm->cm_fromtype] + cm->cm_fromunit;
 810         toelem = softc->sc_firsts[cm->cm_totype] + cm->cm_tounit;
 811
 812         ccb = cam_periph_getccb(periph, /*priority*/ 1);
 813
 814         scsi_move_medium(&ccb->csio,
 815                          /* retries */ 1,
 816                          /* cbfcnp */ chdone,
 817                          /* tag_action */ MSG_SIMPLE_Q_TAG,
 818                          /* tea */ softc->sc_picker,
 819                          /* src */ fromelem,
 820                          /* dst */ toelem,
 821                          /* invert */ (cm->cm_flags & CM_INVERT) ? TRUE : FALSE,
 822                          /* sense_len */ SSD_FULL_SIZE,
 823                          /* timeout */ CH_TIMEOUT_MOVE_MEDIUM);
 824
 825         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/CAM_RETRY_SELTO,
 826                                   /*sense_flags*/ SF_RETRY_UA,
 827                                   softc->device_stats);
 828
 829         xpt_release_ccb(ccb);
 830
 831         return(error);
 832 }
 833
 834 static int
 835 chexchange(struct cam_periph *periph, struct changer_exchange *ce)
 836 {
 837         struct ch_softc *softc;
 838         u_int16_t src, dst1, dst2;
 839         union ccb *ccb;
 840         int error;
 841
 842         error = 0;
 843         softc = (struct ch_softc *)periph->softc;
 844         /*
 845          * Check arguments.
 846          */
 847         if ((ce->ce_srctype > CHET_DT) || (ce->ce_fdsttype > CHET_DT) ||
 848             (ce->ce_sdsttype > CHET_DT))
 849                 return (EINVAL);
 850         if ((ce->ce_srcunit > (softc->sc_counts[ce->ce_srctype] - 1)) ||
 851             (ce->ce_fdstunit > (softc->sc_counts[ce->ce_fdsttype] - 1)) ||
 852             (ce->ce_sdstunit > (softc->sc_counts[ce->ce_sdsttype] - 1)))
 853                 return (ENODEV);
 854
 855         /*
 856          * Check the request against the changer's capabilities.
 857          */
 858         if (((softc->sc_exchangemask[ce->ce_srctype] &
 859              (1 << ce->ce_fdsttype)) == 0) ||
 860             ((softc->sc_exchangemask[ce->ce_fdsttype] &
 861              (1 << ce->ce_sdsttype)) == 0))
 862                 return (ENODEV);
 863
 864         /*
 865          * Calculate the source and destination elements.
 866          */
 867         src = softc->sc_firsts[ce->ce_srctype] + ce->ce_srcunit;
 868         dst1 = softc->sc_firsts[ce->ce_fdsttype] + ce->ce_fdstunit;
 869         dst2 = softc->sc_firsts[ce->ce_sdsttype] + ce->ce_sdstunit;
 870
 871         ccb = cam_periph_getccb(periph, /*priority*/ 1);
 872
 873         scsi_exchange_medium(&ccb->csio,
 874                              /* retries */ 1,
 875                              /* cbfcnp */ chdone,
 876                              /* tag_action */ MSG_SIMPLE_Q_TAG,
 877                              /* tea */ softc->sc_picker,
 878                              /* src */ src,
 879                              /* dst1 */ dst1,
 880                              /* dst2 */ dst2,
 881                              /* invert1 */ (ce->ce_flags & CE_INVERT1) ?
 882                                            TRUE : FALSE,
 883                              /* invert2 */ (ce->ce_flags & CE_INVERT2) ?
 884                                            TRUE : FALSE,
 885                              /* sense_len */ SSD_FULL_SIZE,
 886                              /* timeout */ CH_TIMEOUT_EXCHANGE_MEDIUM);
 887
 888         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/CAM_RETRY_SELTO,
 889                                   /*sense_flags*/ SF_RETRY_UA,
 890                                   softc->device_stats);
 891
 892         xpt_release_ccb(ccb);
 893
 894         return(error);
 895 }
 896
 897 static int
 898 chposition(struct cam_periph *periph, struct changer_position *cp)
 899 {
 900         struct ch_softc *softc;
 901         u_int16_t dst;
 902         union ccb *ccb;
 903         int error;
 904
 905         error = 0;
 906         softc = (struct ch_softc *)periph->softc;
 907
 908         /*
 909          * Check arguments.
 910          */
 911         if (cp->cp_type > CHET_DT)
 912                 return (EINVAL);
 913         if (cp->cp_unit > (softc->sc_counts[cp->cp_type] - 1))
 914                 return (ENODEV);
 915
 916         /*
 917          * Calculate the destination element.
 918          */
 919         dst = softc->sc_firsts[cp->cp_type] + cp->cp_unit;
 920
 921         ccb = cam_periph_getccb(periph, /*priority*/ 1);
 922
 923         scsi_position_to_element(&ccb->csio,
 924                                  /* retries */ 1,
 925                                  /* cbfcnp */ chdone,
 926                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
 927                                  /* tea */ softc->sc_picker,
 928                                  /* dst */ dst,
 929                                  /* invert */ (cp->cp_flags & CP_INVERT) ?
 930                                               TRUE : FALSE,
 931                                  /* sense_len */ SSD_FULL_SIZE,
 932                                  /* timeout */ CH_TIMEOUT_POSITION_TO_ELEMENT);
 933
 934         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
 935                                   /*sense_flags*/ SF_RETRY_UA,
 936                                   softc->device_stats);
 937
 938         xpt_release_ccb(ccb);
 939
 940         return(error);
 941 }
 942
 943 /*
 944  * Copy a volume tag to a volume_tag struct, converting SCSI byte order
 945  * to host native byte order in the volume serial number.  The volume
 946  * label as returned by the changer is transferred to user mode as
 947  * nul-terminated string.  Volume labels are truncated at the first
 948  * space, as suggested by SCSI-2.
 949  */
 950 static  void
 951 copy_voltag(struct changer_voltag *uvoltag, struct volume_tag *voltag)
 952 {
 953         int i;
 954         for (i=0; i<CH_VOLTAG_MAXLEN; i++) {
 955                 char c = voltag->vif[i];
 956                 if (c && c != ' ')
 957                         uvoltag->cv_volid[i] = c;
 958                 else
 959                         break;
 960         }
 961         uvoltag->cv_serial = scsi_2btoul(voltag->vsn);
 962 }
 963
 964 /*
 965  * Copy an an element status descriptor to a user-mode
 966  * changer_element_status structure.
 967  */
 968
 969 static  void
 970 copy_element_status(struct ch_softc *softc,
 971                     u_int16_t flags,
 972                     struct read_element_status_descriptor *desc,
 973                     struct changer_element_status *ces)
 974 {
 975         u_int16_t eaddr = scsi_2btoul(desc->eaddr);
 976         u_int16_t et;
 977
 978         ces->ces_int_addr = eaddr;
 979         /* set up logical address in element status */
 980         for (et = CHET_MT; et <= CHET_DT; et++) {
 981                 if ((softc->sc_firsts[et] <= eaddr)
 982                     && ((softc->sc_firsts[et] + softc->sc_counts[et])
 983                         > eaddr)) {
 984                         ces->ces_addr = eaddr - softc->sc_firsts[et];
 985                         ces->ces_type = et;
 986                         break;
 987                 }
 988         }
 989
 990         ces->ces_flags = desc->flags1;
 991
 992         ces->ces_sensecode = desc->sense_code;
 993         ces->ces_sensequal = desc->sense_qual;
 994
 995         if (desc->flags2 & READ_ELEMENT_STATUS_INVERT)
 996                 ces->ces_flags |= CES_INVERT;
 997
 998         if (desc->flags2 & READ_ELEMENT_STATUS_SVALID) {
 999
1000                 eaddr = scsi_2btoul(desc->ssea);
1001
1002                 /* convert source address to logical format */
1003                 for (et = CHET_MT; et <= CHET_DT; et++) {
1004                         if ((softc->sc_firsts[et] <= eaddr)
1005                             && ((softc->sc_firsts[et] + softc->sc_counts[et])
1006                                 > eaddr)) {
1007                                 ces->ces_source_addr =
1008                                         eaddr - softc->sc_firsts[et];
1009                                 ces->ces_source_type = et;
1010                                 ces->ces_flags |= CES_SOURCE_VALID;
1011                                 break;
1012                         }
1013                 }
1014
1015                 if (!(ces->ces_flags & CES_SOURCE_VALID))
1016                         printf("ch: warning: could not map element source "
1017                                "address %ud to a valid element type\n",
1018                                eaddr);
1019         }
1020
1021
1022         if (flags & READ_ELEMENT_STATUS_PVOLTAG)
1023                 copy_voltag(&(ces->ces_pvoltag), &(desc->pvoltag));
1024         if (flags & READ_ELEMENT_STATUS_AVOLTAG)
1025                 copy_voltag(&(ces->ces_avoltag), &(desc->avoltag));
1026
1027         if (desc->dt_scsi_flags & READ_ELEMENT_STATUS_DT_IDVALID) {
1028                 ces->ces_flags |= CES_SCSIID_VALID;
1029                 ces->ces_scsi_id = desc->dt_scsi_addr;
1030         }
1031
1032         if (desc->dt_scsi_addr & READ_ELEMENT_STATUS_DT_LUVALID) {
1033                 ces->ces_flags |= CES_LUN_VALID;
1034                 ces->ces_scsi_lun =
1035                         desc->dt_scsi_flags & READ_ELEMENT_STATUS_DT_LUNMASK;
1036         }
1037 }
1038
1039 static int
1040 chgetelemstatus(struct cam_periph *periph,
1041                 struct changer_element_status_request *cesr)
1042 {
1043         struct read_element_status_header *st_hdr;
1044         struct read_element_status_page_header *pg_hdr;
1045         struct read_element_status_descriptor *desc;
1046         caddr_t data = NULL;
1047         size_t size, desclen;
1048         int avail, i, error = 0;
1049         struct changer_element_status *user_data = NULL;
1050         struct ch_softc *softc;
1051         union ccb *ccb;
1052         int chet = cesr->cesr_element_type;
1053         int want_voltags = (cesr->cesr_flags & CESR_VOLTAGS) ? 1 : 0;
1054
1055         softc = (struct ch_softc *)periph->softc;
1056
1057         /* perform argument checking */
1058
1059         /*
1060          * Perform a range check on the cesr_element_{base,count}
1061          * request argument fields.
1062          */
1063         if ((softc->sc_counts[chet] - cesr->cesr_element_base) <= 0
1064             || (cesr->cesr_element_base + cesr->cesr_element_count)
1065                 > softc->sc_counts[chet])
1066                 return (EINVAL);
1067
1068         /*
1069          * Request one descriptor for the given element type.  This
1070          * is used to determine the size of the descriptor so that
1071          * we can allocate enough storage for all of them.  We assume
1072          * that the first one can fit into 1k.
1073          */
1074         cam_periph_unlock(periph);
1075         data = (caddr_t)malloc(1024, M_DEVBUF, M_WAITOK);
1076
1077         cam_periph_lock(periph);
1078         ccb = cam_periph_getccb(periph, /*priority*/ 1);
1079
1080         scsi_read_element_status(&ccb->csio,
1081                                  /* retries */ 1,
1082                                  /* cbfcnp */ chdone,
1083                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
1084                                  /* voltag */ want_voltags,
1085                                  /* sea */ softc->sc_firsts[chet],
1086                                  /* count */ 1,
1087                                  /* data_ptr */ data,
1088                                  /* dxfer_len */ 1024,
1089                                  /* sense_len */ SSD_FULL_SIZE,
1090                                  /* timeout */ CH_TIMEOUT_READ_ELEMENT_STATUS);
1091
1092         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1093                                   /*sense_flags*/ SF_RETRY_UA,
1094                                   softc->device_stats);
1095
1096         if (error)
1097                 goto done;
1098         cam_periph_unlock(periph);
1099
1100         st_hdr = (struct read_element_status_header *)data;
1101         pg_hdr = (struct read_element_status_page_header *)((uintptr_t)st_hdr +
1102                   sizeof(struct read_element_status_header));
1103         desclen = scsi_2btoul(pg_hdr->edl);
1104
1105         size = sizeof(struct read_element_status_header) +
1106                sizeof(struct read_element_status_page_header) +
1107                (desclen * cesr->cesr_element_count);
1108
1109         /*
1110          * Reallocate storage for descriptors and get them from the
1111          * device.
1112          */
1113         free(data, M_DEVBUF);
1114         data = (caddr_t)malloc(size, M_DEVBUF, M_WAITOK);
1115
1116         cam_periph_lock(periph);
1117         scsi_read_element_status(&ccb->csio,
1118                                  /* retries */ 1,
1119                                  /* cbfcnp */ chdone,
1120                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
1121                                  /* voltag */ want_voltags,
1122                                  /* sea */ softc->sc_firsts[chet]
1123                                  + cesr->cesr_element_base,
1124                                  /* count */ cesr->cesr_element_count,
1125                                  /* data_ptr */ data,
1126                                  /* dxfer_len */ size,
1127                                  /* sense_len */ SSD_FULL_SIZE,
1128                                  /* timeout */ CH_TIMEOUT_READ_ELEMENT_STATUS);
1129
1130         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1131                                   /*sense_flags*/ SF_RETRY_UA,
1132                                   softc->device_stats);
1133
1134         if (error)
1135                 goto done;
1136         cam_periph_unlock(periph);
1137
1138         /*
1139          * Fill in the user status array.
1140          */
1141         st_hdr = (struct read_element_status_header *)data;
1142         pg_hdr = (struct read_element_status_page_header *)((uintptr_t)st_hdr +
1143                   sizeof(struct read_element_status_header));
1144         avail = scsi_2btoul(st_hdr->count);
1145
1146         if (avail != cesr->cesr_element_count) {
1147                 xpt_print(periph->path,
1148                     "warning, READ ELEMENT STATUS avail != count\n");
1149         }
1150
1151         user_data = (struct changer_element_status *)
1152                 malloc(avail * sizeof(struct changer_element_status),
1153                        M_DEVBUF, M_WAITOK | M_ZERO);
1154
1155         desc = (struct read_element_status_descriptor *)((uintptr_t)data +
1156                 sizeof(struct read_element_status_header) +
1157                 sizeof(struct read_element_status_page_header));
1158         /*
1159          * Set up the individual element status structures
1160          */
1161         for (i = 0; i < avail; ++i) {
1162                 struct changer_element_status *ces = &(user_data[i]);
1163
1164                 copy_element_status(softc, pg_hdr->flags, desc, ces);
1165
1166                 desc = (struct read_element_status_descriptor *)
1167                        ((uintptr_t)desc + desclen);
1168         }
1169
1170         /* Copy element status structures out to userspace. */
1171         error = copyout(user_data,
1172                         cesr->cesr_element_status,
1173                         avail * sizeof(struct changer_element_status));
1174         cam_periph_lock(periph);
1175
1176  done:
1177         xpt_release_ccb(ccb);
1178
1179         if (data != NULL)
1180                 free(data, M_DEVBUF);
1181         if (user_data != NULL)
1182                 free(user_data, M_DEVBUF);
1183
1184         return (error);
1185 }
1186
1187 static int
1188 chielem(struct cam_periph *periph,
1189         unsigned int timeout)
1190 {
1191         union ccb *ccb;
1192         struct ch_softc *softc;
1193         int error;
1194
1195         if (!timeout) {
1196                 timeout = CH_TIMEOUT_INITIALIZE_ELEMENT_STATUS;
1197         } else {
1198                 timeout *= 1000;
1199         }
1200
1201         error = 0;
1202         softc = (struct ch_softc *)periph->softc;
1203
1204         ccb = cam_periph_getccb(periph, /*priority*/ 1);
1205
1206         scsi_initialize_element_status(&ccb->csio,
1207                                       /* retries */ 1,
1208                                       /* cbfcnp */ chdone,
1209                                       /* tag_action */ MSG_SIMPLE_Q_TAG,
1210                                       /* sense_len */ SSD_FULL_SIZE,
1211                                       /* timeout */ timeout);
1212
1213         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1214                                   /*sense_flags*/ SF_RETRY_UA,
1215                                   softc->device_stats);
1216
1217         xpt_release_ccb(ccb);
1218
1219         return(error);
1220 }
1221
1222 static int
1223 chsetvoltag(struct cam_periph *periph,
1224             struct changer_set_voltag_request *csvr)
1225 {
1226         union ccb *ccb;
1227         struct ch_softc *softc;
1228         u_int16_t ea;
1229         u_int8_t sac;
1230         struct scsi_send_volume_tag_parameters ssvtp;
1231         int error;
1232         int i;
1233
1234         error = 0;
1235         softc = (struct ch_softc *)periph->softc;
1236
1237         bzero(&ssvtp, sizeof(ssvtp));
1238         for (i=0; i<sizeof(ssvtp.vitf); i++) {
1239                 ssvtp.vitf[i] = ' ';
1240         }
1241
1242         /*
1243          * Check arguments.
1244          */
1245         if (csvr->csvr_type > CHET_DT)
1246                 return EINVAL;
1247         if (csvr->csvr_addr > (softc->sc_counts[csvr->csvr_type] - 1))
1248                 return ENODEV;
1249
1250         ea = softc->sc_firsts[csvr->csvr_type] + csvr->csvr_addr;
1251
1252         if (csvr->csvr_flags & CSVR_ALTERNATE) {
1253                 switch (csvr->csvr_flags & CSVR_MODE_MASK) {
1254                 case CSVR_MODE_SET:
1255                         sac = SEND_VOLUME_TAG_ASSERT_ALTERNATE;
1256                         break;
1257                 case CSVR_MODE_REPLACE:
1258                         sac = SEND_VOLUME_TAG_REPLACE_ALTERNATE;
1259                         break;
1260                 case CSVR_MODE_CLEAR:
1261                         sac = SEND_VOLUME_TAG_UNDEFINED_ALTERNATE;
1262                         break;
1263                 default:
1264                         error = EINVAL;
1265                         goto out;
1266                 }
1267         } else {
1268                 switch (csvr->csvr_flags & CSVR_MODE_MASK) {
1269                 case CSVR_MODE_SET:
1270                         sac = SEND_VOLUME_TAG_ASSERT_PRIMARY;
1271                         break;
1272                 case CSVR_MODE_REPLACE:
1273                         sac = SEND_VOLUME_TAG_REPLACE_PRIMARY;
1274                         break;
1275                 case CSVR_MODE_CLEAR:
1276                         sac = SEND_VOLUME_TAG_UNDEFINED_PRIMARY;
1277                         break;
1278                 default:
1279                         error = EINVAL;
1280                         goto out;
1281                 }
1282         }
1283
1284         memcpy(ssvtp.vitf, csvr->csvr_voltag.cv_volid,
1285                min(strlen(csvr->csvr_voltag.cv_volid), sizeof(ssvtp.vitf)));
1286         scsi_ulto2b(csvr->csvr_voltag.cv_serial, ssvtp.minvsn);
1287
1288         ccb = cam_periph_getccb(periph, /*priority*/ 1);
1289
1290         scsi_send_volume_tag(&ccb->csio,
1291                              /* retries */ 1,
1292                              /* cbfcnp */ chdone,
1293                              /* tag_action */ MSG_SIMPLE_Q_TAG,
1294                              /* element_address */ ea,
1295                              /* send_action_code */ sac,
1296                              /* parameters */ &ssvtp,
1297                              /* sense_len */ SSD_FULL_SIZE,
1298                              /* timeout */ CH_TIMEOUT_SEND_VOLTAG);
1299
1300         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1301                                   /*sense_flags*/ SF_RETRY_UA,
1302                                   softc->device_stats);
1303
1304         xpt_release_ccb(ccb);
1305
1306  out:
1307         return error;
1308 }
1309
1310 static int
1311 chgetparams(struct cam_periph *periph)
1312 {
1313         union ccb *ccb;
1314         struct ch_softc *softc;
1315         void *mode_buffer;
1316         int mode_buffer_len;
1317         struct page_element_address_assignment *ea;
1318         struct page_device_capabilities *cap;
1319         int error, from, dbd;
1320         u_int8_t *moves, *exchanges;
1321
1322         error = 0;
1323
1324         softc = (struct ch_softc *)periph->softc;
1325
1326         ccb = cam_periph_getccb(periph, /*priority*/ 1);
1327
1328         /*
1329          * The scsi_mode_sense_data structure is just a convenience
1330          * structure that allows us to easily calculate the worst-case
1331          * storage size of the mode sense buffer.
1332          */
1333         mode_buffer_len = sizeof(struct scsi_mode_sense_data);
1334
1335         mode_buffer = malloc(mode_buffer_len, M_SCSICH, M_NOWAIT);
1336
1337         if (mode_buffer == NULL) {
1338                 printf("chgetparams: couldn't malloc mode sense data\n");
1339                 return(ENOSPC);
1340         }
1341
1342         bzero(mode_buffer, mode_buffer_len);
1343
1344         if (softc->quirks & CH_Q_NO_DBD)
1345                 dbd = FALSE;
1346         else
1347                 dbd = TRUE;
1348
1349         /*
1350          * Get the element address assignment page.
1351          */
1352         scsi_mode_sense(&ccb->csio,
1353                         /* retries */ 1,
1354                         /* cbfcnp */ chdone,
1355                         /* tag_action */ MSG_SIMPLE_Q_TAG,
1356                         /* dbd */ dbd,
1357                         /* page_code */ SMS_PAGE_CTRL_CURRENT,
1358                         /* page */ CH_ELEMENT_ADDR_ASSIGN_PAGE,
1359                         /* param_buf */ (u_int8_t *)mode_buffer,
1360                         /* param_len */ mode_buffer_len,
1361                         /* sense_len */ SSD_FULL_SIZE,
1362                         /* timeout */ CH_TIMEOUT_MODE_SENSE);
1363
1364         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1365                                   /* sense_flags */ SF_RETRY_UA|SF_NO_PRINT,
1366                                   softc->device_stats);
1367
1368         if (error) {
1369                 if (dbd) {
1370                         struct scsi_mode_sense_6 *sms;
1371
1372                         sms = (struct scsi_mode_sense_6 *)
1373                                 ccb->csio.cdb_io.cdb_bytes;
1374
1375                         sms->byte2 &= ~SMS_DBD;
1376                         error = cam_periph_runccb(ccb, cherror,
1377                                                   /*cam_flags*/ CAM_RETRY_SELTO,
1378                                                   /*sense_flags*/ SF_RETRY_UA,
1379                                                   softc->device_stats);
1380                 } else {
1381                         /*
1382                          * Since we disabled sense printing above, print
1383                          * out the sense here since we got an error.
1384                          */
1385                         scsi_sense_print(&ccb->csio);
1386                 }
1387
1388                 if (error) {
1389                         xpt_print(periph->path,
1390                             "chgetparams: error getting element "
1391                             "address page\n");
1392                         xpt_release_ccb(ccb);
1393                         free(mode_buffer, M_SCSICH);
1394                         return(error);
1395                 }
1396         }
1397
1398         ea = (struct page_element_address_assignment *)
1399                 find_mode_page_6((struct scsi_mode_header_6 *)mode_buffer);
1400
1401         softc->sc_firsts[CHET_MT] = scsi_2btoul(ea->mtea);
1402         softc->sc_counts[CHET_MT] = scsi_2btoul(ea->nmte);
1403         softc->sc_firsts[CHET_ST] = scsi_2btoul(ea->fsea);
1404         softc->sc_counts[CHET_ST] = scsi_2btoul(ea->nse);
1405         softc->sc_firsts[CHET_IE] = scsi_2btoul(ea->fieea);
1406         softc->sc_counts[CHET_IE] = scsi_2btoul(ea->niee);
1407         softc->sc_firsts[CHET_DT] = scsi_2btoul(ea->fdtea);
1408         softc->sc_counts[CHET_DT] = scsi_2btoul(ea->ndte);
1409
1410         bzero(mode_buffer, mode_buffer_len);
1411
1412         /*
1413          * Now get the device capabilities page.
1414          */
1415         scsi_mode_sense(&ccb->csio,
1416                         /* retries */ 1,
1417                         /* cbfcnp */ chdone,
1418                         /* tag_action */ MSG_SIMPLE_Q_TAG,
1419                         /* dbd */ dbd,
1420                         /* page_code */ SMS_PAGE_CTRL_CURRENT,
1421                         /* page */ CH_DEVICE_CAP_PAGE,
1422                         /* param_buf */ (u_int8_t *)mode_buffer,
1423                         /* param_len */ mode_buffer_len,
1424                         /* sense_len */ SSD_FULL_SIZE,
1425                         /* timeout */ CH_TIMEOUT_MODE_SENSE);
1426
1427         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1428                                   /* sense_flags */ SF_RETRY_UA | SF_NO_PRINT,
1429                                   softc->device_stats);
1430
1431         if (error) {
1432                 if (dbd) {
1433                         struct scsi_mode_sense_6 *sms;
1434
1435                         sms = (struct scsi_mode_sense_6 *)
1436                                 ccb->csio.cdb_io.cdb_bytes;
1437
1438                         sms->byte2 &= ~SMS_DBD;
1439                         error = cam_periph_runccb(ccb, cherror,
1440                                                   /*cam_flags*/ CAM_RETRY_SELTO,
1441                                                   /*sense_flags*/ SF_RETRY_UA,
1442                                                   softc->device_stats);
1443                 } else {
1444                         /*
1445                          * Since we disabled sense printing above, print
1446                          * out the sense here since we got an error.
1447                          */
1448                         scsi_sense_print(&ccb->csio);
1449                 }
1450
1451                 if (error) {
1452                         xpt_print(periph->path,
1453                             "chgetparams: error getting device "
1454                             "capabilities page\n");
1455                         xpt_release_ccb(ccb);
1456                         free(mode_buffer, M_SCSICH);
1457                         return(error);
1458                 }
1459         }
1460
1461         xpt_release_ccb(ccb);
1462
1463         cap = (struct page_device_capabilities *)
1464                 find_mode_page_6((struct scsi_mode_header_6 *)mode_buffer);
1465
1466         bzero(softc->sc_movemask, sizeof(softc->sc_movemask));
1467         bzero(softc->sc_exchangemask, sizeof(softc->sc_exchangemask));
1468         moves = cap->move_from;
1469         exchanges = cap->exchange_with;
1470         for (from = CHET_MT; from <= CHET_MAX; ++from) {
1471                 softc->sc_movemask[from] = moves[from];
1472                 softc->sc_exchangemask[from] = exchanges[from];
1473         }
1474
1475         free(mode_buffer, M_SCSICH);
1476
1477         return(error);
1478 }
1479
1480 void
1481 scsi_move_medium(struct ccb_scsiio *csio, u_int32_t retries,
1482                  void (*cbfcnp)(struct cam_periph *, union ccb *),
1483                  u_int8_t tag_action, u_int32_t tea, u_int32_t src,
1484                  u_int32_t dst, int invert, u_int8_t sense_len,
1485                  u_int32_t timeout)
1486 {
1487         struct scsi_move_medium *scsi_cmd;
1488
1489         scsi_cmd = (struct scsi_move_medium *)&csio->cdb_io.cdb_bytes;
1490         bzero(scsi_cmd, sizeof(*scsi_cmd));
1491
1492         scsi_cmd->opcode = MOVE_MEDIUM;
1493
1494         scsi_ulto2b(tea, scsi_cmd->tea);
1495         scsi_ulto2b(src, scsi_cmd->src);
1496         scsi_ulto2b(dst, scsi_cmd->dst);
1497
1498         if (invert)
1499                 scsi_cmd->invert |= MOVE_MEDIUM_INVERT;
1500
1501         cam_fill_csio(csio,
1502                       retries,
1503                       cbfcnp,
1504                       /*flags*/ CAM_DIR_NONE,
1505                       tag_action,
1506                       /*data_ptr*/ NULL,
1507                       /*dxfer_len*/ 0,
1508                       sense_len,
1509                       sizeof(*scsi_cmd),
1510                       timeout);
1511 }
1512
1513 void
1514 scsi_exchange_medium(struct ccb_scsiio *csio, u_int32_t retries,
1515                      void (*cbfcnp)(struct cam_periph *, union ccb *),
1516                      u_int8_t tag_action, u_int32_t tea, u_int32_t src,
1517                      u_int32_t dst1, u_int32_t dst2, int invert1,
1518                      int invert2, u_int8_t sense_len, u_int32_t timeout)
1519 {
1520         struct scsi_exchange_medium *scsi_cmd;
1521
1522         scsi_cmd = (struct scsi_exchange_medium *)&csio->cdb_io.cdb_bytes;
1523         bzero(scsi_cmd, sizeof(*scsi_cmd));
1524
1525         scsi_cmd->opcode = EXCHANGE_MEDIUM;
1526
1527         scsi_ulto2b(tea, scsi_cmd->tea);
1528         scsi_ulto2b(src, scsi_cmd->src);
1529         scsi_ulto2b(dst1, scsi_cmd->fdst);
1530         scsi_ulto2b(dst2, scsi_cmd->sdst);
1531
1532         if (invert1)
1533                 scsi_cmd->invert |= EXCHANGE_MEDIUM_INV1;
1534
1535         if (invert2)
1536                 scsi_cmd->invert |= EXCHANGE_MEDIUM_INV2;
1537
1538         cam_fill_csio(csio,
1539                       retries,
1540                       cbfcnp,
1541                       /*flags*/ CAM_DIR_NONE,
1542                       tag_action,
1543                       /*data_ptr*/ NULL,
1544                       /*dxfer_len*/ 0,
1545                       sense_len,
1546                       sizeof(*scsi_cmd),
1547                       timeout);
1548 }
1549
1550 void
1551 scsi_position_to_element(struct ccb_scsiio *csio, u_int32_t retries,
1552                          void (*cbfcnp)(struct cam_periph *, union ccb *),
1553                          u_int8_t tag_action, u_int32_t tea, u_int32_t dst,
1554                          int invert, u_int8_t sense_len, u_int32_t timeout)
1555 {
1556         struct scsi_position_to_element *scsi_cmd;
1557
1558         scsi_cmd = (struct scsi_position_to_element *)&csio->cdb_io.cdb_bytes;
1559         bzero(scsi_cmd, sizeof(*scsi_cmd));
1560
1561         scsi_cmd->opcode = POSITION_TO_ELEMENT;
1562
1563         scsi_ulto2b(tea, scsi_cmd->tea);
1564         scsi_ulto2b(dst, scsi_cmd->dst);
1565
1566         if (invert)
1567                 scsi_cmd->invert |= POSITION_TO_ELEMENT_INVERT;
1568
1569         cam_fill_csio(csio,
1570                       retries,
1571                       cbfcnp,
1572                       /*flags*/ CAM_DIR_NONE,
1573                       tag_action,
1574                       /*data_ptr*/ NULL,
1575                       /*dxfer_len*/ 0,
1576                       sense_len,
1577                       sizeof(*scsi_cmd),
1578                       timeout);
1579 }
1580
1581 void
1582 scsi_read_element_status(struct ccb_scsiio *csio, u_int32_t retries,
1583                          void (*cbfcnp)(struct cam_periph *, union ccb *),
1584                          u_int8_t tag_action, int voltag, u_int32_t sea,
1585                          u_int32_t count, u_int8_t *data_ptr,
1586                          u_int32_t dxfer_len, u_int8_t sense_len,
1587                          u_int32_t timeout)
1588 {
1589         struct scsi_read_element_status *scsi_cmd;
1590
1591         scsi_cmd = (struct scsi_read_element_status *)&csio->cdb_io.cdb_bytes;
1592         bzero(scsi_cmd, sizeof(*scsi_cmd));
1593
1594         scsi_cmd->opcode = READ_ELEMENT_STATUS;
1595
1596         scsi_ulto2b(sea, scsi_cmd->sea);
1597         scsi_ulto2b(count, scsi_cmd->count);
1598         scsi_ulto3b(dxfer_len, scsi_cmd->len);
1599
1600         if (voltag)
1601                 scsi_cmd->byte2 |= READ_ELEMENT_STATUS_VOLTAG;
1602
1603         cam_fill_csio(csio,
1604                       retries,
1605                       cbfcnp,
1606                       /*flags*/ CAM_DIR_IN,
1607                       tag_action,
1608                       data_ptr,
1609                       dxfer_len,
1610                       sense_len,
1611                       sizeof(*scsi_cmd),
1612                       timeout);
1613 }
1614
1615 void
1616 scsi_initialize_element_status(struct ccb_scsiio *csio, u_int32_t retries,
1617                                void (*cbfcnp)(struct cam_periph *, union ccb *),
1618                                u_int8_t tag_action, u_int8_t sense_len,
1619                                u_int32_t timeout)
1620 {
1621         struct scsi_initialize_element_status *scsi_cmd;
1622
1623         scsi_cmd = (struct scsi_initialize_element_status *)
1624                     &csio->cdb_io.cdb_bytes;
1625         bzero(scsi_cmd, sizeof(*scsi_cmd));
1626
1627         scsi_cmd->opcode = INITIALIZE_ELEMENT_STATUS;
1628
1629         cam_fill_csio(csio,
1630                       retries,
1631                       cbfcnp,
1632                       /*flags*/ CAM_DIR_NONE,
1633                       tag_action,
1634                       /* data_ptr */ NULL,
1635                       /* dxfer_len */ 0,
1636                       sense_len,
1637                       sizeof(*scsi_cmd),
1638                       timeout);
1639 }
1640
1641 void
1642 scsi_send_volume_tag(struct ccb_scsiio *csio, u_int32_t retries,
1643                      void (*cbfcnp)(struct cam_periph *, union ccb *),
1644                      u_int8_t tag_action,
1645                      u_int16_t element_address,
1646                      u_int8_t send_action_code,
1647                      struct scsi_send_volume_tag_parameters *parameters,
1648                      u_int8_t sense_len, u_int32_t timeout)
1649 {
1650         struct scsi_send_volume_tag *scsi_cmd;
1651
1652         scsi_cmd = (struct scsi_send_volume_tag *) &csio->cdb_io.cdb_bytes;
1653         bzero(scsi_cmd, sizeof(*scsi_cmd));
1654
1655         scsi_cmd->opcode = SEND_VOLUME_TAG;
1656         scsi_ulto2b(element_address, scsi_cmd->ea);
1657         scsi_cmd->sac = send_action_code;
1658         scsi_ulto2b(sizeof(*parameters), scsi_cmd->pll);
1659
1660         cam_fill_csio(csio,
1661                       retries,
1662                       cbfcnp,
1663                       /*flags*/ CAM_DIR_OUT,
1664                       tag_action,
1665                       /* data_ptr */ (u_int8_t *) parameters,
1666                       sizeof(*parameters),
1667                       sense_len,
1668                       sizeof(*scsi_cmd),
1669                       timeout);
1670 }