sys/bus/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  * $FreeBSD: src/sys/cam/scsi/scsi_ch.c,v 1.20.2.2 2000/10/31 08:09:49 dwmalone Exp $
  28  * $DragonFly: src/sys/bus/cam/scsi/scsi_ch.c,v 1.28 2008/07/18 00:07:23 dillon Exp $
  29  */
  30 /*
  31  * Derived from the NetBSD SCSI changer driver.
  32  *
  33  *      $NetBSD: ch.c,v 1.32 1998/01/12 09:49:12 thorpej Exp $
  34  *
  35  */
  36 /*
  37  * Copyright (c) 1996, 1997 Jason R. Thorpe <thorpej@and.com>
  38  * All rights reserved.
  39  *
  40  * Partially based on an autochanger driver written by Stefan Grefen
  41  * and on an autochanger driver written by the Systems Programming Group
  42  * at the University of Utah Computer Science Department.
  43  *
  44  * Redistribution and use in source and binary forms, with or without
  45  * modification, are permitted provided that the following conditions
  46  * are met:
  47  * 1. Redistributions of source code must retain the above copyright
  48  *    notice, this list of conditions and the following disclaimer.
  49  * 2. Redistributions in binary form must reproduce the above copyright
  50  *    notice, this list of conditions and the following disclaimer in the
  51  *    documentation and/or other materials provided with the distribution.
  52  * 3. All advertising materials mentioning features or use of this software
  53  *    must display the following acknowledgements:
  54  *      This product includes software developed by Jason R. Thorpe
  55  *      for And Communications, http://www.and.com/
  56  * 4. The name of the author may not be used to endorse or promote products
  57  *    derived from this software without specific prior written permission.
  58  *
  59  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  60  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  61  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  62  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  63  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  64  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  65  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  66  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  67  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  68  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  69  * SUCH DAMAGE.
  70  */
  71
  72 #include <sys/param.h>
  73 #include <sys/queue.h>
  74 #include <sys/systm.h>
  75 #include <sys/kernel.h>
  76 #include <sys/types.h>
  77 #include <sys/malloc.h>
  78 #include <sys/fcntl.h>
  79 #include <sys/conf.h>
  80 #include <sys/buf.h>
  81 #include <sys/chio.h>
  82 #include <sys/errno.h>
  83 #include <sys/devicestat.h>
  84 #include <sys/thread2.h>
  85
  86 #include "../cam.h"
  87 #include "../cam_ccb.h"
  88 #include "../cam_extend.h"
  89 #include "../cam_periph.h"
  90 #include "../cam_xpt_periph.h"
  91 #include "../cam_queue.h"
  92 #include "../cam_debug.h"
  93
  94 #include "scsi_all.h"
  95 #include "scsi_message.h"
  96 #include "scsi_ch.h"
  97
  98 /*
  99  * Timeout definitions for various changer related commands.  They may
 100  * be too short for some devices (especially the timeout for INITIALIZE
 101  * ELEMENT STATUS).
 102  */
 103
 104 static const u_int32_t  CH_TIMEOUT_MODE_SENSE                = 6000;
 105 static const u_int32_t  CH_TIMEOUT_MOVE_MEDIUM               = 100000;
 106 static const u_int32_t  CH_TIMEOUT_EXCHANGE_MEDIUM           = 100000;
 107 static const u_int32_t  CH_TIMEOUT_POSITION_TO_ELEMENT       = 100000;
 108 static const u_int32_t  CH_TIMEOUT_READ_ELEMENT_STATUS       = 10000;
 109 static const u_int32_t  CH_TIMEOUT_SEND_VOLTAG               = 10000;
 110 static const u_int32_t  CH_TIMEOUT_INITIALIZE_ELEMENT_STATUS = 500000;
 111
 112 typedef enum {
 113         CH_FLAG_INVALID         = 0x001,
 114         CH_FLAG_OPEN            = 0x002
 115 } ch_flags;
 116
 117 typedef enum {
 118         CH_STATE_PROBE,
 119         CH_STATE_NORMAL
 120 } ch_state;
 121
 122 typedef enum {
 123         CH_CCB_PROBE,
 124         CH_CCB_WAITING
 125 } ch_ccb_types;
 126
 127 typedef enum {
 128         CH_Q_NONE       = 0x00,
 129         CH_Q_NO_DBD     = 0x01
 130 } ch_quirks;
 131
 132 #define ccb_state       ppriv_field0
 133 #define ccb_bio         ppriv_ptr1
 134
 135 struct scsi_mode_sense_data {
 136         struct scsi_mode_header_6 header;
 137         struct scsi_mode_blk_desc blk_desc;
 138         union {
 139                 struct page_element_address_assignment ea;
 140                 struct page_transport_geometry_parameters tg;
 141                 struct page_device_capabilities cap;
 142         } pages;
 143 };
 144
 145 struct ch_softc {
 146         ch_flags        flags;
 147         ch_state        state;
 148         ch_quirks       quirks;
 149         union ccb       saved_ccb;
 150         struct devstat  device_stats;
 151
 152         int             sc_picker;      /* current picker */
 153
 154         /*
 155          * The following information is obtained from the
 156          * element address assignment page.
 157          */
 158         int             sc_firsts[CHET_MAX + 1];        /* firsts */
 159         int             sc_counts[CHET_MAX + 1];        /* counts */
 160
 161         /*
 162          * The following mask defines the legal combinations
 163          * of elements for the MOVE MEDIUM command.
 164          */
 165         u_int8_t        sc_movemask[CHET_MAX + 1];
 166
 167         /*
 168          * As above, but for EXCHANGE MEDIUM.
 169          */
 170         u_int8_t        sc_exchangemask[CHET_MAX + 1];
 171
 172         /*
 173          * Quirks; see below.  XXX KDM not implemented yet
 174          */
 175         int             sc_settledelay; /* delay for settle */
 176 };
 177
 178 #define CHUNIT(x)       (minor((x)))
 179 #define CH_CDEV_MAJOR   17
 180
 181 static  d_open_t        chopen;
 182 static  d_close_t       chclose;
 183 static  d_ioctl_t       chioctl;
 184 static  periph_init_t   chinit;
 185 static  periph_ctor_t   chregister;
 186 static  periph_oninv_t  choninvalidate;
 187 static  periph_dtor_t   chcleanup;
 188 static  periph_start_t  chstart;
 189 static  void            chasync(void *callback_arg, u_int32_t code,
 190                                 struct cam_path *path, void *arg);
 191 static  void            chdone(struct cam_periph *periph,
 192                                union ccb *done_ccb);
 193 static  int             cherror(union ccb *ccb, u_int32_t cam_flags,
 194                                 u_int32_t sense_flags);
 195 static  int             chmove(struct cam_periph *periph,
 196                                struct changer_move *cm);
 197 static  int             chexchange(struct cam_periph *periph,
 198                                    struct changer_exchange *ce);
 199 static  int             chposition(struct cam_periph *periph,
 200                                    struct changer_position *cp);
 201 static  int             chgetelemstatus(struct cam_periph *periph,
 202                                 struct changer_element_status_request *csr);
 203 static  int             chsetvoltag(struct cam_periph *periph,
 204                                     struct changer_set_voltag_request *csvr);
 205 static  int             chielem(struct cam_periph *periph,
 206                                 unsigned int timeout);
 207 static  int             chgetparams(struct cam_periph *periph);
 208
 209 static struct periph_driver chdriver =
 210 {
 211         chinit, "ch",
 212         TAILQ_HEAD_INITIALIZER(chdriver.units), /* generation */ 0
 213 };
 214
 215 PERIPHDRIVER_DECLARE(ch, chdriver);
 216
 217 static struct dev_ops ch_ops = {
 218         { "ch", CH_CDEV_MAJOR, 0 },
 219         .d_open = chopen,
 220         .d_close = chclose,
 221         .d_ioctl = chioctl
 222 };
 223
 224 static struct extend_array *chperiphs;
 225
 226 MALLOC_DEFINE(M_SCSICH, "scsi_ch", "scsi_ch buffers");
 227
 228 static void
 229 chinit(void)
 230 {
 231         cam_status status;
 232
 233         /*
 234          * Create our extend array for storing the devices we attach to.
 235          */
 236         chperiphs = cam_extend_new();
 237         if (chperiphs == NULL) {
 238                 kprintf("ch: Failed to alloc extend array!\n");
 239                 return;
 240         }
 241
 242         /*
 243          * Install a global async callback.  This callback will
 244          * receive async callbacks like "new device found".
 245          */
 246         status = xpt_register_async(AC_FOUND_DEVICE, chasync, NULL, NULL);
 247
 248         if (status != CAM_REQ_CMP) {
 249                 kprintf("ch: Failed to attach master async callback "
 250                        "due to status 0x%x!\n", status);
 251         }
 252 }
 253
 254 static void
 255 choninvalidate(struct cam_periph *periph)
 256 {
 257         struct ch_softc *softc;
 258
 259         softc = (struct ch_softc *)periph->softc;
 260
 261         /*
 262          * De-register any async callbacks.
 263          */
 264         xpt_register_async(0, chasync, periph, periph->path);
 265
 266         softc->flags |= CH_FLAG_INVALID;
 267
 268         xpt_print(periph->path, "lost device\n");
 269
 270 }
 271
 272 static void
 273 chcleanup(struct cam_periph *periph)
 274 {
 275         struct ch_softc *softc;
 276
 277         softc = (struct ch_softc *)periph->softc;
 278
 279         devstat_remove_entry(&softc->device_stats);
 280         cam_extend_release(chperiphs, periph->unit_number);
 281         xpt_print(periph->path, "removing device entry\n");
 282         dev_ops_remove(&ch_ops, -1, periph->unit_number);
 283         kfree(softc, M_DEVBUF);
 284 }
 285
 286 static void
 287 chasync(void *callback_arg, u_int32_t code, struct cam_path *path, void *arg)
 288 {
 289         struct cam_periph *periph;
 290
 291         periph = (struct cam_periph *)callback_arg;
 292
 293         switch(code) {
 294         case AC_FOUND_DEVICE:
 295         {
 296                 struct ccb_getdev *cgd;
 297                 cam_status status;
 298
 299                 cgd = (struct ccb_getdev *)arg;
 300                 if (cgd == NULL)
 301                         break;
 302
 303                 if (SID_TYPE(&cgd->inq_data)!= T_CHANGER)
 304                         break;
 305
 306                 /*
 307                  * Allocate a peripheral instance for
 308                  * this device and start the probe
 309                  * process.
 310                  */
 311                 status = cam_periph_alloc(chregister, choninvalidate,
 312                                           chcleanup, chstart, "ch",
 313                                           CAM_PERIPH_BIO, cgd->ccb_h.path,
 314                                           chasync, AC_FOUND_DEVICE, cgd);
 315
 316                 if (status != CAM_REQ_CMP
 317                  && status != CAM_REQ_INPROG)
 318                         kprintf("chasync: Unable to probe new device "
 319                                "due to status 0x%x\n", status);
 320
 321                 break;
 322
 323         }
 324         default:
 325                 cam_periph_async(periph, code, path, arg);
 326                 break;
 327         }
 328 }
 329
 330 static cam_status
 331 chregister(struct cam_periph *periph, void *arg)
 332 {
 333         struct ch_softc *softc;
 334         struct ccb_getdev *cgd;
 335
 336         cgd = (struct ccb_getdev *)arg;
 337         if (periph == NULL) {
 338                 kprintf("chregister: periph was NULL!!\n");
 339                 return(CAM_REQ_CMP_ERR);
 340         }
 341
 342         if (cgd == NULL) {
 343                 kprintf("chregister: no getdev CCB, can't register device\n");
 344                 return(CAM_REQ_CMP_ERR);
 345         }
 346
 347         softc = kmalloc(sizeof(*softc), M_DEVBUF, M_INTWAIT | M_ZERO);
 348         softc->state = CH_STATE_PROBE;
 349         periph->softc = softc;
 350         cam_extend_set(chperiphs, periph->unit_number, periph);
 351         softc->quirks = CH_Q_NONE;
 352
 353         /*
 354          * Changers don't have a blocksize, and obviously don't support
 355          * tagged queueing.
 356          */
 357         cam_periph_unlock(periph);
 358         devstat_add_entry(&softc->device_stats, "ch",
 359                           periph->unit_number, 0,
 360                           DEVSTAT_NO_BLOCKSIZE | DEVSTAT_NO_ORDERED_TAGS,
 361                           SID_TYPE(&cgd->inq_data)| DEVSTAT_TYPE_IF_SCSI,
 362                           DEVSTAT_PRIORITY_OTHER);
 363
 364         /* Register the device */
 365         dev_ops_add(&ch_ops, -1, periph->unit_number);
 366         make_dev(&ch_ops, periph->unit_number, UID_ROOT,
 367                   GID_OPERATOR, 0600, "%s%d", periph->periph_name,
 368                   periph->unit_number);
 369         cam_periph_lock(periph);
 370
 371         /*
 372          * Add an async callback so that we get
 373          * notified if this device goes away.
 374          */
 375         xpt_register_async(AC_LOST_DEVICE, chasync, periph, periph->path);
 376
 377         /*
 378          * Lock this periph until we are setup.
 379          * This first call can't block
 380          */
 381         cam_periph_hold(periph, 0);
 382         xpt_schedule(periph, /*priority*/5);
 383
 384         return(CAM_REQ_CMP);
 385 }
 386
 387 static int
 388 chopen(struct dev_open_args *ap)
 389 {
 390         cdev_t dev = ap->a_head.a_dev;
 391         struct cam_periph *periph;
 392         struct ch_softc *softc;
 393         int unit, error;
 394
 395         unit = CHUNIT(dev);
 396         periph = cam_extend_get(chperiphs, unit);
 397
 398         if (cam_periph_acquire(periph) != CAM_REQ_CMP)
 399                 return (ENXIO);
 400
 401         softc = (struct ch_softc *)periph->softc;
 402
 403         cam_periph_lock(periph);
 404
 405         if (softc->flags & CH_FLAG_INVALID) {
 406                 cam_periph_unlock(periph);
 407                 cam_periph_release(periph);
 408                 return(ENXIO);
 409         }
 410
 411         if ((softc->flags & CH_FLAG_OPEN) == 0)
 412                 softc->flags |= CH_FLAG_OPEN;
 413         else
 414                 cam_periph_release(periph);
 415
 416         if ((error = cam_periph_hold(periph, PCATCH)) != 0) {
 417                 cam_periph_unlock(periph);
 418                 cam_periph_release(periph);
 419                 return (error);
 420         }
 421
 422         /*
 423          * Load information about this changer device into the softc.
 424          */
 425         if ((error = chgetparams(periph)) != 0) {
 426                 softc->flags &= ~CH_FLAG_OPEN;
 427                 cam_periph_unhold(periph, 1);
 428                 cam_periph_release(periph);
 429         } else {
 430                 cam_periph_unhold(periph, 1);
 431         }
 432
 433         return(error);
 434 }
 435
 436 static int
 437 chclose(struct dev_close_args *ap)
 438 {
 439         cdev_t dev = ap->a_head.a_dev;
 440         struct  cam_periph *periph;
 441         struct  ch_softc *softc;
 442         int     unit, error;
 443
 444         error = 0;
 445
 446         unit = CHUNIT(dev);
 447         periph = cam_extend_get(chperiphs, unit);
 448         if (periph == NULL)
 449                 return(ENXIO);
 450
 451         softc = (struct ch_softc *)periph->softc;
 452
 453         cam_periph_lock(periph);
 454
 455         softc->flags &= ~CH_FLAG_OPEN;
 456
 457         cam_periph_unlock(periph);
 458         cam_periph_release(periph);
 459
 460         return(0);
 461 }
 462
 463 static void
 464 chstart(struct cam_periph *periph, union ccb *start_ccb)
 465 {
 466         struct ch_softc *softc;
 467
 468         softc = (struct ch_softc *)periph->softc;
 469
 470         switch (softc->state) {
 471         case CH_STATE_NORMAL:
 472         {
 473                 if (periph->immediate_priority <= periph->pinfo.priority){
 474                         start_ccb->ccb_h.ccb_state = CH_CCB_WAITING;
 475
 476                         SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
 477                                           periph_links.sle);
 478                         periph->immediate_priority = CAM_PRIORITY_NONE;
 479                         wakeup(&periph->ccb_list);
 480                 }
 481                 break;
 482         }
 483         case CH_STATE_PROBE:
 484         {
 485                 int mode_buffer_len;
 486                 void *mode_buffer;
 487
 488                 /*
 489                  * Include the block descriptor when calculating the mode
 490                  * buffer length,
 491                  */
 492                 mode_buffer_len = sizeof(struct scsi_mode_header_6) +
 493                                   sizeof(struct scsi_mode_blk_desc) +
 494                                  sizeof(struct page_element_address_assignment);
 495
 496                 mode_buffer = kmalloc(mode_buffer_len, M_SCSICH, M_INTWAIT | M_ZERO);
 497                 /*
 498                  * Get the element address assignment page.
 499                  */
 500                 scsi_mode_sense(&start_ccb->csio,
 501                                 /* retries */ 1,
 502                                 /* cbfcnp */ chdone,
 503                                 /* tag_action */ MSG_SIMPLE_Q_TAG,
 504                                 /* dbd */ (softc->quirks & CH_Q_NO_DBD) ?
 505                                         FALSE : TRUE,
 506                                 /* page_code */ SMS_PAGE_CTRL_CURRENT,
 507                                 /* page */ CH_ELEMENT_ADDR_ASSIGN_PAGE,
 508                                 /* param_buf */ (u_int8_t *)mode_buffer,
 509                                 /* param_len */ mode_buffer_len,
 510                                 /* sense_len */ SSD_FULL_SIZE,
 511                                 /* timeout */ CH_TIMEOUT_MODE_SENSE);
 512
 513                 start_ccb->ccb_h.ccb_bio = NULL;
 514                 start_ccb->ccb_h.ccb_state = CH_CCB_PROBE;
 515                 xpt_action(start_ccb);
 516                 break;
 517         }
 518         }
 519 }
 520
 521 static void
 522 chdone(struct cam_periph *periph, union ccb *done_ccb)
 523 {
 524         struct ch_softc *softc;
 525         struct ccb_scsiio *csio;
 526
 527         softc = (struct ch_softc *)periph->softc;
 528         csio = &done_ccb->csio;
 529
 530         switch(done_ccb->ccb_h.ccb_state) {
 531         case CH_CCB_PROBE:
 532         {
 533                 struct scsi_mode_header_6 *mode_header;
 534                 struct page_element_address_assignment *ea;
 535                 char announce_buf[80];
 536
 537
 538                 mode_header = (struct scsi_mode_header_6 *)csio->data_ptr;
 539
 540                 ea = (struct page_element_address_assignment *)
 541                         find_mode_page_6(mode_header);
 542
 543                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP){
 544
 545                         softc->sc_firsts[CHET_MT] = scsi_2btoul(ea->mtea);
 546                         softc->sc_counts[CHET_MT] = scsi_2btoul(ea->nmte);
 547                         softc->sc_firsts[CHET_ST] = scsi_2btoul(ea->fsea);
 548                         softc->sc_counts[CHET_ST] = scsi_2btoul(ea->nse);
 549                         softc->sc_firsts[CHET_IE] = scsi_2btoul(ea->fieea);
 550                         softc->sc_counts[CHET_IE] = scsi_2btoul(ea->niee);
 551                         softc->sc_firsts[CHET_DT] = scsi_2btoul(ea->fdtea);
 552                         softc->sc_counts[CHET_DT] = scsi_2btoul(ea->ndte);
 553                         softc->sc_picker = softc->sc_firsts[CHET_MT];
 554
 555 #define PLURAL(c)       (c) == 1 ? "" : "s"
 556                         ksnprintf(announce_buf, sizeof(announce_buf),
 557                                 "%d slot%s, %d drive%s, "
 558                                 "%d picker%s, %d portal%s",
 559                                 softc->sc_counts[CHET_ST],
 560                                 PLURAL(softc->sc_counts[CHET_ST]),
 561                                 softc->sc_counts[CHET_DT],
 562                                 PLURAL(softc->sc_counts[CHET_DT]),
 563                                 softc->sc_counts[CHET_MT],
 564                                 PLURAL(softc->sc_counts[CHET_MT]),
 565                                 softc->sc_counts[CHET_IE],
 566                                 PLURAL(softc->sc_counts[CHET_IE]));
 567 #undef PLURAL
 568                 } else {
 569                         int error;
 570
 571                         error = cherror(done_ccb, CAM_RETRY_SELTO,
 572                                         SF_RETRY_UA | SF_NO_PRINT);
 573                         /*
 574                          * Retry any UNIT ATTENTION type errors.  They
 575                          * are expected at boot.
 576                          */
 577                         if (error == ERESTART) {
 578                                 /*
 579                                  * A retry was scheuled, so
 580                                  * just return.
 581                                  */
 582                                 return;
 583                         } else if (error != 0) {
 584                                 int retry_scheduled;
 585                                 struct scsi_mode_sense_6 *sms;
 586
 587                                 sms = (struct scsi_mode_sense_6 *)
 588                                         done_ccb->csio.cdb_io.cdb_bytes;
 589
 590                                 /*
 591                                  * Check to see if block descriptors were
 592                                  * disabled.  Some devices don't like that.
 593                                  * We're taking advantage of the fact that
 594                                  * the first few bytes of the 6 and 10 byte
 595                                  * mode sense commands are the same.  If
 596                                  * block descriptors were disabled, enable
 597                                  * them and re-send the command.
 598                                  */
 599                                 if (sms->byte2 & SMS_DBD) {
 600                                         sms->byte2 &= ~SMS_DBD;
 601                                         xpt_action(done_ccb);
 602                                         softc->quirks |= CH_Q_NO_DBD;
 603                                         retry_scheduled = 1;
 604                                 } else
 605                                         retry_scheduled = 0;
 606
 607                                 /* Don't wedge this device's queue */
 608                                 cam_release_devq(done_ccb->ccb_h.path,
 609                                                  /*relsim_flags*/0,
 610                                                  /*reduction*/0,
 611                                                  /*timeout*/0,
 612                                                  /*getcount_only*/0);
 613
 614                                 if (retry_scheduled)
 615                                         return;
 616
 617                                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK)
 618                                     == CAM_SCSI_STATUS_ERROR)
 619                                         scsi_sense_print(&done_ccb->csio);
 620                                 else {
 621                                         xpt_print(periph->path,
 622                                             "got CAM status %#x\n",
 623                                             done_ccb->ccb_h.status);
 624                                 }
 625                                 xpt_print(periph->path, "fatal error, failed "
 626                                     "to attach to device\n");
 627
 628                                 cam_periph_invalidate(periph);
 629
 630                                 announce_buf[0] = '\0';
 631                         }
 632                 }
 633                 if (announce_buf[0] != '\0')
 634                         xpt_announce_periph(periph, announce_buf);
 635                 softc->state = CH_STATE_NORMAL;
 636                 kfree(mode_header, M_SCSICH);
 637                 /*
 638                  * Since our peripheral may be invalidated by an error
 639                  * above or an external event, we must release our CCB
 640                  * before releasing the probe lock on the peripheral.
 641                  * The peripheral will only go away once the last lock
 642                  * is removed, and we need it around for the CCB release
 643                  * operation.
 644                  */
 645                 xpt_release_ccb(done_ccb);
 646                 cam_periph_unhold(periph, 0);
 647                 return;
 648         }
 649         case CH_CCB_WAITING:
 650         {
 651                 /* Caller will release the CCB */
 652                 wakeup(&done_ccb->ccb_h.cbfcnp);
 653                 return;
 654         }
 655         default:
 656                 break;
 657         }
 658         xpt_release_ccb(done_ccb);
 659 }
 660
 661 static int
 662 cherror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
 663 {
 664         struct ch_softc *softc;
 665         struct cam_periph *periph;
 666
 667         periph = xpt_path_periph(ccb->ccb_h.path);
 668         softc = (struct ch_softc *)periph->softc;
 669
 670         return (cam_periph_error(ccb, cam_flags, sense_flags,
 671                                  &softc->saved_ccb));
 672 }
 673
 674 static int
 675 chioctl(struct dev_ioctl_args *ap)
 676 {
 677         cdev_t dev = ap->a_head.a_dev;
 678         caddr_t addr = ap->a_data;
 679         int flag = ap->a_fflag;
 680         struct cam_periph *periph;
 681         struct ch_softc *softc;
 682         u_int8_t unit;
 683         int error;
 684
 685         unit = CHUNIT(dev);
 686
 687         periph = cam_extend_get(chperiphs, unit);
 688         if (periph == NULL)
 689                 return(ENXIO);
 690
 691         cam_periph_lock(periph);
 692         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering chioctl\n"));
 693
 694         softc = (struct ch_softc *)periph->softc;
 695
 696         error = 0;
 697
 698         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
 699                   ("trying to do ioctl %#lx\n", ap->a_cmd));
 700
 701         /*
 702          * If this command can change the device's state, we must
 703          * have the device open for writing.
 704          */
 705         switch (ap->a_cmd) {
 706         case CHIOGPICKER:
 707         case CHIOGPARAMS:
 708         case CHIOGSTATUS:
 709                 break;
 710
 711         default:
 712                 if ((flag & FWRITE) == 0) {
 713                         cam_periph_unlock(periph);
 714                         return (EBADF);
 715                 }
 716         }
 717
 718         switch (ap->a_cmd) {
 719         case CHIOMOVE:
 720                 error = chmove(periph, (struct changer_move *)addr);
 721                 break;
 722
 723         case CHIOEXCHANGE:
 724                 error = chexchange(periph, (struct changer_exchange *)addr);
 725                 break;
 726
 727         case CHIOPOSITION:
 728                 error = chposition(periph, (struct changer_position *)addr);
 729                 break;
 730
 731         case CHIOGPICKER:
 732                 *(int *)addr = softc->sc_picker - softc->sc_firsts[CHET_MT];
 733                 break;
 734
 735         case CHIOSPICKER:
 736         {
 737                 int new_picker = *(int *)addr;
 738
 739                 if (new_picker > (softc->sc_counts[CHET_MT] - 1)) {
 740                         error = EINVAL;
 741                         break;
 742                 }
 743                 softc->sc_picker = softc->sc_firsts[CHET_MT] + new_picker;
 744                 break;
 745         }
 746         case CHIOGPARAMS:
 747         {
 748                 struct changer_params *cp = (struct changer_params *)addr;
 749
 750                 cp->cp_npickers = softc->sc_counts[CHET_MT];
 751                 cp->cp_nslots = softc->sc_counts[CHET_ST];
 752                 cp->cp_nportals = softc->sc_counts[CHET_IE];
 753                 cp->cp_ndrives = softc->sc_counts[CHET_DT];
 754                 break;
 755         }
 756         case CHIOIELEM:
 757                 error = chielem(periph, *(unsigned int *)addr);
 758                 break;
 759
 760         case CHIOGSTATUS:
 761         {
 762                 error = chgetelemstatus(periph,
 763                                (struct changer_element_status_request *) addr);
 764                 break;
 765         }
 766
 767         case CHIOSETVOLTAG:
 768         {
 769                 error = chsetvoltag(periph,
 770                                     (struct changer_set_voltag_request *) addr);
 771                 break;
 772         }
 773
 774         /* Implement prevent/allow? */
 775
 776         default:
 777                 error = cam_periph_ioctl(periph, ap->a_cmd, addr, cherror);
 778                 break;
 779         }
 780
 781         cam_periph_unlock(periph);
 782         return (error);
 783 }
 784
 785 static int
 786 chmove(struct cam_periph *periph, struct changer_move *cm)
 787 {
 788         struct ch_softc *softc;
 789         u_int16_t fromelem, toelem;
 790         union ccb *ccb;
 791         int error;
 792
 793         error = 0;
 794         softc = (struct ch_softc *)periph->softc;
 795
 796         /*
 797          * Check arguments.
 798          */
 799         if ((cm->cm_fromtype > CHET_DT) || (cm->cm_totype > CHET_DT))
 800                 return (EINVAL);
 801         if ((cm->cm_fromunit > (softc->sc_counts[cm->cm_fromtype] - 1)) ||
 802             (cm->cm_tounit > (softc->sc_counts[cm->cm_totype] - 1)))
 803                 return (ENODEV);
 804
 805         /*
 806          * Check the request against the changer's capabilities.
 807          */
 808         if ((softc->sc_movemask[cm->cm_fromtype] & (1 << cm->cm_totype)) == 0)
 809                 return (ENODEV);
 810
 811         /*
 812          * Calculate the source and destination elements.
 813          */
 814         fromelem = softc->sc_firsts[cm->cm_fromtype] + cm->cm_fromunit;
 815         toelem = softc->sc_firsts[cm->cm_totype] + cm->cm_tounit;
 816
 817         ccb = cam_periph_getccb(periph, /*priority*/ 1);
 818
 819         scsi_move_medium(&ccb->csio,
 820                          /* retries */ 1,
 821                          /* cbfcnp */ chdone,
 822                          /* tag_action */ MSG_SIMPLE_Q_TAG,
 823                          /* tea */ softc->sc_picker,
 824                          /* src */ fromelem,
 825                          /* dst */ toelem,
 826                          /* invert */ (cm->cm_flags & CM_INVERT) ? TRUE : FALSE,
 827                          /* sense_len */ SSD_FULL_SIZE,
 828                          /* timeout */ CH_TIMEOUT_MOVE_MEDIUM);
 829
 830         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/CAM_RETRY_SELTO,
 831                                   /*sense_flags*/ SF_RETRY_UA,
 832                                   &softc->device_stats);
 833
 834         xpt_release_ccb(ccb);
 835
 836         return(error);
 837 }
 838
 839 static int
 840 chexchange(struct cam_periph *periph, struct changer_exchange *ce)
 841 {
 842         struct ch_softc *softc;
 843         u_int16_t src, dst1, dst2;
 844         union ccb *ccb;
 845         int error;
 846
 847         error = 0;
 848         softc = (struct ch_softc *)periph->softc;
 849         /*
 850          * Check arguments.
 851          */
 852         if ((ce->ce_srctype > CHET_DT) || (ce->ce_fdsttype > CHET_DT) ||
 853             (ce->ce_sdsttype > CHET_DT))
 854                 return (EINVAL);
 855         if ((ce->ce_srcunit > (softc->sc_counts[ce->ce_srctype] - 1)) ||
 856             (ce->ce_fdstunit > (softc->sc_counts[ce->ce_fdsttype] - 1)) ||
 857             (ce->ce_sdstunit > (softc->sc_counts[ce->ce_sdsttype] - 1)))
 858                 return (ENODEV);
 859
 860         /*
 861          * Check the request against the changer's capabilities.
 862          */
 863         if (((softc->sc_exchangemask[ce->ce_srctype] &
 864              (1 << ce->ce_fdsttype)) == 0) ||
 865             ((softc->sc_exchangemask[ce->ce_fdsttype] &
 866              (1 << ce->ce_sdsttype)) == 0))
 867                 return (ENODEV);
 868
 869         /*
 870          * Calculate the source and destination elements.
 871          */
 872         src = softc->sc_firsts[ce->ce_srctype] + ce->ce_srcunit;
 873         dst1 = softc->sc_firsts[ce->ce_fdsttype] + ce->ce_fdstunit;
 874         dst2 = softc->sc_firsts[ce->ce_sdsttype] + ce->ce_sdstunit;
 875
 876         ccb = cam_periph_getccb(periph, /*priority*/ 1);
 877
 878         scsi_exchange_medium(&ccb->csio,
 879                              /* retries */ 1,
 880                              /* cbfcnp */ chdone,
 881                              /* tag_action */ MSG_SIMPLE_Q_TAG,
 882                              /* tea */ softc->sc_picker,
 883                              /* src */ src,
 884                              /* dst1 */ dst1,
 885                              /* dst2 */ dst2,
 886                              /* invert1 */ (ce->ce_flags & CE_INVERT1) ?
 887                                            TRUE : FALSE,
 888                              /* invert2 */ (ce->ce_flags & CE_INVERT2) ?
 889                                            TRUE : FALSE,
 890                              /* sense_len */ SSD_FULL_SIZE,
 891                              /* timeout */ CH_TIMEOUT_EXCHANGE_MEDIUM);
 892
 893         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/CAM_RETRY_SELTO,
 894                                   /*sense_flags*/ SF_RETRY_UA,
 895                                   &softc->device_stats);
 896
 897         xpt_release_ccb(ccb);
 898
 899         return(error);
 900 }
 901
 902 static int
 903 chposition(struct cam_periph *periph, struct changer_position *cp)
 904 {
 905         struct ch_softc *softc;
 906         u_int16_t dst;
 907         union ccb *ccb;
 908         int error;
 909
 910         error = 0;
 911         softc = (struct ch_softc *)periph->softc;
 912
 913         /*
 914          * Check arguments.
 915          */
 916         if (cp->cp_type > CHET_DT)
 917                 return (EINVAL);
 918         if (cp->cp_unit > (softc->sc_counts[cp->cp_type] - 1))
 919                 return (ENODEV);
 920
 921         /*
 922          * Calculate the destination element.
 923          */
 924         dst = softc->sc_firsts[cp->cp_type] + cp->cp_unit;
 925
 926         ccb = cam_periph_getccb(periph, /*priority*/ 1);
 927
 928         scsi_position_to_element(&ccb->csio,
 929                                  /* retries */ 1,
 930                                  /* cbfcnp */ chdone,
 931                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
 932                                  /* tea */ softc->sc_picker,
 933                                  /* dst */ dst,
 934                                  /* invert */ (cp->cp_flags & CP_INVERT) ?
 935                                               TRUE : FALSE,
 936                                  /* sense_len */ SSD_FULL_SIZE,
 937                                  /* timeout */ CH_TIMEOUT_POSITION_TO_ELEMENT);
 938
 939         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
 940                                   /*sense_flags*/ SF_RETRY_UA,
 941                                   &softc->device_stats);
 942
 943         xpt_release_ccb(ccb);
 944
 945         return(error);
 946 }
 947
 948 /*
 949  * Copy a volume tag to a volume_tag struct, converting SCSI byte order
 950  * to host native byte order in the volume serial number.  The volume
 951  * label as returned by the changer is transferred to user mode as
 952  * nul-terminated string.  Volume labels are truncated at the first
 953  * space, as suggested by SCSI-2.
 954  */
 955 static  void
 956 copy_voltag(struct changer_voltag *uvoltag, struct volume_tag *voltag)
 957 {
 958         int i;
 959         for (i=0; i<CH_VOLTAG_MAXLEN; i++) {
 960                 char c = voltag->vif[i];
 961                 if (c && c != ' ')
 962                         uvoltag->cv_volid[i] = c;
 963                 else
 964                         break;
 965         }
 966         uvoltag->cv_serial = scsi_2btoul(voltag->vsn);
 967 }
 968
 969 /*
 970  * Copy an an element status descriptor to a user-mode
 971  * changer_element_status structure.
 972  */
 973
 974 static  void
 975 copy_element_status(struct ch_softc *softc,
 976                     u_int16_t flags,
 977                     struct read_element_status_descriptor *desc,
 978                     struct changer_element_status *ces)
 979 {
 980         u_int16_t eaddr = scsi_2btoul(desc->eaddr);
 981         u_int16_t et;
 982
 983         ces->ces_int_addr = eaddr;
 984         /* set up logical address in element status */
 985         for (et = CHET_MT; et <= CHET_DT; et++) {
 986                 if ((softc->sc_firsts[et] <= eaddr)
 987                     && ((softc->sc_firsts[et] + softc->sc_counts[et])
 988                         > eaddr)) {
 989                         ces->ces_addr = eaddr - softc->sc_firsts[et];
 990                         ces->ces_type = et;
 991                         break;
 992                 }
 993         }
 994
 995         ces->ces_flags = desc->flags1;
 996
 997         ces->ces_sensecode = desc->sense_code;
 998         ces->ces_sensequal = desc->sense_qual;
 999
1000         if (desc->flags2 & READ_ELEMENT_STATUS_INVERT)
1001                 ces->ces_flags |= CES_INVERT;
1002
1003         if (desc->flags2 & READ_ELEMENT_STATUS_SVALID) {
1004
1005                 eaddr = scsi_2btoul(desc->ssea);
1006
1007                 /* convert source address to logical format */
1008                 for (et = CHET_MT; et <= CHET_DT; et++) {
1009                         if ((softc->sc_firsts[et] <= eaddr)
1010                             && ((softc->sc_firsts[et] + softc->sc_counts[et])
1011                                 > eaddr)) {
1012                                 ces->ces_source_addr =
1013                                         eaddr - softc->sc_firsts[et];
1014                                 ces->ces_source_type = et;
1015                                 ces->ces_flags |= CES_SOURCE_VALID;
1016                                 break;
1017                         }
1018                 }
1019
1020                 if (!(ces->ces_flags & CES_SOURCE_VALID))
1021                         kprintf("ch: warning: could not map element source "
1022                                "address %ud to a valid element type\n",
1023                                eaddr);
1024         }
1025
1026
1027         if (flags & READ_ELEMENT_STATUS_PVOLTAG)
1028                 copy_voltag(&(ces->ces_pvoltag), &(desc->pvoltag));
1029         if (flags & READ_ELEMENT_STATUS_AVOLTAG)
1030                 copy_voltag(&(ces->ces_avoltag), &(desc->avoltag));
1031
1032         if (desc->dt_scsi_flags & READ_ELEMENT_STATUS_DT_IDVALID) {
1033                 ces->ces_flags |= CES_SCSIID_VALID;
1034                 ces->ces_scsi_id = desc->dt_scsi_addr;
1035         }
1036
1037         if (desc->dt_scsi_addr & READ_ELEMENT_STATUS_DT_LUVALID) {
1038                 ces->ces_flags |= CES_LUN_VALID;
1039                 ces->ces_scsi_lun =
1040                         desc->dt_scsi_flags & READ_ELEMENT_STATUS_DT_LUNMASK;
1041         }
1042 }
1043
1044 static int
1045 chgetelemstatus(struct cam_periph *periph,
1046                 struct changer_element_status_request *cesr)
1047 {
1048         struct read_element_status_header *st_hdr;
1049         struct read_element_status_page_header *pg_hdr;
1050         struct read_element_status_descriptor *desc;
1051         caddr_t data = NULL;
1052         size_t size, desclen;
1053         int avail, i, error = 0;
1054         struct changer_element_status *user_data = NULL;
1055         struct ch_softc *softc;
1056         union ccb *ccb;
1057         int chet = cesr->cesr_element_type;
1058         int want_voltags = (cesr->cesr_flags & CESR_VOLTAGS) ? 1 : 0;
1059
1060         softc = (struct ch_softc *)periph->softc;
1061
1062         /* perform argument checking */
1063
1064         /*
1065          * Perform a range check on the cesr_element_{base,count}
1066          * request argument fields.
1067          */
1068         if ((softc->sc_counts[chet] - cesr->cesr_element_base) <= 0
1069             || (cesr->cesr_element_base + cesr->cesr_element_count)
1070                 > softc->sc_counts[chet])
1071                 return (EINVAL);
1072
1073         /*
1074          * Request one descriptor for the given element type.  This
1075          * is used to determine the size of the descriptor so that
1076          * we can allocate enough storage for all of them.  We assume
1077          * that the first one can fit into 1k.
1078          */
1079         cam_periph_unlock(periph);
1080         data = (caddr_t)kmalloc(1024, M_DEVBUF, M_INTWAIT);
1081
1082         cam_periph_lock(periph);
1083         ccb = cam_periph_getccb(periph, /*priority*/ 1);
1084
1085         scsi_read_element_status(&ccb->csio,
1086                                  /* retries */ 1,
1087                                  /* cbfcnp */ chdone,
1088                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
1089                                  /* voltag */ want_voltags,
1090                                  /* sea */ softc->sc_firsts[chet],
1091                                  /* count */ 1,
1092                                  /* data_ptr */ data,
1093                                  /* dxfer_len */ 1024,
1094                                  /* sense_len */ SSD_FULL_SIZE,
1095                                  /* timeout */ CH_TIMEOUT_READ_ELEMENT_STATUS);
1096
1097         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1098                                   /*sense_flags*/ SF_RETRY_UA,
1099                                   &softc->device_stats);
1100
1101         if (error)
1102                 goto done;
1103         cam_periph_unlock(periph);
1104
1105         st_hdr = (struct read_element_status_header *)data;
1106         pg_hdr = (struct read_element_status_page_header *)((uintptr_t)st_hdr +
1107                   sizeof(struct read_element_status_header));
1108         desclen = scsi_2btoul(pg_hdr->edl);
1109
1110         size = sizeof(struct read_element_status_header) +
1111                sizeof(struct read_element_status_page_header) +
1112                (desclen * cesr->cesr_element_count);
1113
1114         /*
1115          * Reallocate storage for descriptors and get them from the
1116          * device.
1117          */
1118         kfree(data, M_DEVBUF);
1119         data = (caddr_t)kmalloc(size, M_DEVBUF, M_INTWAIT);
1120
1121         cam_periph_lock(periph);
1122         scsi_read_element_status(&ccb->csio,
1123                                  /* retries */ 1,
1124                                  /* cbfcnp */ chdone,
1125                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
1126                                  /* voltag */ want_voltags,
1127                                  /* sea */ softc->sc_firsts[chet]
1128                                  + cesr->cesr_element_base,
1129                                  /* count */ cesr->cesr_element_count,
1130                                  /* data_ptr */ data,
1131                                  /* dxfer_len */ size,
1132                                  /* sense_len */ SSD_FULL_SIZE,
1133                                  /* timeout */ CH_TIMEOUT_READ_ELEMENT_STATUS);
1134
1135         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1136                                   /*sense_flags*/ SF_RETRY_UA,
1137                                   &softc->device_stats);
1138
1139         if (error)
1140                 goto done;
1141         cam_periph_unlock(periph);
1142
1143         /*
1144          * Fill in the user status array.
1145          */
1146         st_hdr = (struct read_element_status_header *)data;
1147         pg_hdr = (struct read_element_status_page_header *)((uintptr_t)st_hdr +
1148                   sizeof(struct read_element_status_header));
1149         avail = scsi_2btoul(st_hdr->count);
1150
1151         if (avail != cesr->cesr_element_count) {
1152                 xpt_print(periph->path,
1153                     "warning, READ ELEMENT STATUS avail != count\n");
1154         }
1155
1156         user_data = (struct changer_element_status *)
1157                 kmalloc(avail * sizeof(struct changer_element_status),
1158                        M_DEVBUF, M_INTWAIT | M_ZERO);
1159
1160         desc = (struct read_element_status_descriptor *)((uintptr_t)data +
1161                 sizeof(struct read_element_status_header) +
1162                 sizeof(struct read_element_status_page_header));
1163         /*
1164          * Set up the individual element status structures
1165          */
1166         for (i = 0; i < avail; ++i) {
1167                 struct changer_element_status *ces = &(user_data[i]);
1168
1169                 copy_element_status(softc, pg_hdr->flags, desc, ces);
1170
1171                 desc = (struct read_element_status_descriptor *)
1172                        ((uintptr_t)desc + desclen);
1173         }
1174
1175         /* Copy element status structures out to userspace. */
1176         error = copyout(user_data,
1177                         cesr->cesr_element_status,
1178                         avail * sizeof(struct changer_element_status));
1179         cam_periph_lock(periph);
1180
1181  done:
1182         xpt_release_ccb(ccb);
1183
1184         if (data != NULL)
1185                 kfree(data, M_DEVBUF);
1186         if (user_data != NULL)
1187                 kfree(user_data, M_DEVBUF);
1188
1189         return (error);
1190 }
1191
1192 static int
1193 chielem(struct cam_periph *periph,
1194         unsigned int timeout)
1195 {
1196         union ccb *ccb;
1197         struct ch_softc *softc;
1198         int error;
1199
1200         if (!timeout) {
1201                 timeout = CH_TIMEOUT_INITIALIZE_ELEMENT_STATUS;
1202         } else {
1203                 timeout *= 1000;
1204         }
1205
1206         error = 0;
1207         softc = (struct ch_softc *)periph->softc;
1208
1209         ccb = cam_periph_getccb(periph, /*priority*/ 1);
1210
1211         scsi_initialize_element_status(&ccb->csio,
1212                                       /* retries */ 1,
1213                                       /* cbfcnp */ chdone,
1214                                       /* tag_action */ MSG_SIMPLE_Q_TAG,
1215                                       /* sense_len */ SSD_FULL_SIZE,
1216                                       /* timeout */ timeout);
1217
1218         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1219                                   /*sense_flags*/ SF_RETRY_UA,
1220                                   &softc->device_stats);
1221
1222         xpt_release_ccb(ccb);
1223
1224         return(error);
1225 }
1226
1227 static int
1228 chsetvoltag(struct cam_periph *periph,
1229             struct changer_set_voltag_request *csvr)
1230 {
1231         union ccb *ccb;
1232         struct ch_softc *softc;
1233         u_int16_t ea;
1234         u_int8_t sac;
1235         struct scsi_send_volume_tag_parameters ssvtp;
1236         int error;
1237         int i;
1238
1239         error = 0;
1240         softc = (struct ch_softc *)periph->softc;
1241
1242         bzero(&ssvtp, sizeof(ssvtp));
1243         for (i=0; i<sizeof(ssvtp.vitf); i++) {
1244                 ssvtp.vitf[i] = ' ';
1245         }
1246
1247         /*
1248          * Check arguments.
1249          */
1250         if (csvr->csvr_type > CHET_DT)
1251                 return EINVAL;
1252         if (csvr->csvr_addr > (softc->sc_counts[csvr->csvr_type] - 1))
1253                 return ENODEV;
1254
1255         ea = softc->sc_firsts[csvr->csvr_type] + csvr->csvr_addr;
1256
1257         if (csvr->csvr_flags & CSVR_ALTERNATE) {
1258                 switch (csvr->csvr_flags & CSVR_MODE_MASK) {
1259                 case CSVR_MODE_SET:
1260                         sac = SEND_VOLUME_TAG_ASSERT_ALTERNATE;
1261                         break;
1262                 case CSVR_MODE_REPLACE:
1263                         sac = SEND_VOLUME_TAG_REPLACE_ALTERNATE;
1264                         break;
1265                 case CSVR_MODE_CLEAR:
1266                         sac = SEND_VOLUME_TAG_UNDEFINED_ALTERNATE;
1267                         break;
1268                 default:
1269                         error = EINVAL;
1270                         goto out;
1271                 }
1272         } else {
1273                 switch (csvr->csvr_flags & CSVR_MODE_MASK) {
1274                 case CSVR_MODE_SET:
1275                         sac = SEND_VOLUME_TAG_ASSERT_PRIMARY;
1276                         break;
1277                 case CSVR_MODE_REPLACE:
1278                         sac = SEND_VOLUME_TAG_REPLACE_PRIMARY;
1279                         break;
1280                 case CSVR_MODE_CLEAR:
1281                         sac = SEND_VOLUME_TAG_UNDEFINED_PRIMARY;
1282                         break;
1283                 default:
1284                         error = EINVAL;
1285                         goto out;
1286                 }
1287         }
1288
1289         memcpy(ssvtp.vitf, csvr->csvr_voltag.cv_volid,
1290                min(strlen(csvr->csvr_voltag.cv_volid), sizeof(ssvtp.vitf)));
1291         scsi_ulto2b(csvr->csvr_voltag.cv_serial, ssvtp.minvsn);
1292
1293         ccb = cam_periph_getccb(periph, /*priority*/ 1);
1294
1295         scsi_send_volume_tag(&ccb->csio,
1296                              /* retries */ 1,
1297                              /* cbfcnp */ chdone,
1298                              /* tag_action */ MSG_SIMPLE_Q_TAG,
1299                              /* element_address */ ea,
1300                              /* send_action_code */ sac,
1301                              /* parameters */ &ssvtp,
1302                              /* sense_len */ SSD_FULL_SIZE,
1303                              /* timeout */ CH_TIMEOUT_SEND_VOLTAG);
1304
1305         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1306                                   /*sense_flags*/ SF_RETRY_UA,
1307                                   &softc->device_stats);
1308
1309         xpt_release_ccb(ccb);
1310
1311  out:
1312         return error;
1313 }
1314
1315 static int
1316 chgetparams(struct cam_periph *periph)
1317 {
1318         union ccb *ccb;
1319         struct ch_softc *softc;
1320         void *mode_buffer;
1321         int mode_buffer_len;
1322         struct page_element_address_assignment *ea;
1323         struct page_device_capabilities *cap;
1324         int error, from, dbd;
1325         u_int8_t *moves, *exchanges;
1326
1327         error = 0;
1328
1329         softc = (struct ch_softc *)periph->softc;
1330
1331         ccb = cam_periph_getccb(periph, /*priority*/ 1);
1332
1333         /*
1334          * The scsi_mode_sense_data structure is just a convenience
1335          * structure that allows us to easily calculate the worst-case
1336          * storage size of the mode sense buffer.
1337          */
1338         mode_buffer_len = sizeof(struct scsi_mode_sense_data);
1339
1340         mode_buffer = kmalloc(mode_buffer_len, M_SCSICH, M_INTWAIT | M_ZERO);
1341
1342         if (softc->quirks & CH_Q_NO_DBD)
1343                 dbd = FALSE;
1344         else
1345                 dbd = TRUE;
1346
1347         /*
1348          * Get the element address assignment page.
1349          */
1350         scsi_mode_sense(&ccb->csio,
1351                         /* retries */ 1,
1352                         /* cbfcnp */ chdone,
1353                         /* tag_action */ MSG_SIMPLE_Q_TAG,
1354                         /* dbd */ dbd,
1355                         /* page_code */ SMS_PAGE_CTRL_CURRENT,
1356                         /* page */ CH_ELEMENT_ADDR_ASSIGN_PAGE,
1357                         /* param_buf */ (u_int8_t *)mode_buffer,
1358                         /* param_len */ mode_buffer_len,
1359                         /* sense_len */ SSD_FULL_SIZE,
1360                         /* timeout */ CH_TIMEOUT_MODE_SENSE);
1361
1362         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1363                                   /* sense_flags */ SF_RETRY_UA|SF_NO_PRINT,
1364                                   &softc->device_stats);
1365
1366         if (error) {
1367                 if (dbd) {
1368                         struct scsi_mode_sense_6 *sms;
1369
1370                         sms = (struct scsi_mode_sense_6 *)
1371                                 ccb->csio.cdb_io.cdb_bytes;
1372
1373                         sms->byte2 &= ~SMS_DBD;
1374                         error = cam_periph_runccb(ccb, cherror,
1375                                                   /*cam_flags*/ CAM_RETRY_SELTO,
1376                                                   /*sense_flags*/ SF_RETRY_UA,
1377                                                   &softc->device_stats);
1378                 } else {
1379                         /*
1380                          * Since we disabled sense printing above, print
1381                          * out the sense here since we got an error.
1382                          */
1383                         scsi_sense_print(&ccb->csio);
1384                 }
1385
1386                 if (error) {
1387                         xpt_print(periph->path,
1388                             "chgetparams: error getting element "
1389                             "address page\n");
1390                         xpt_release_ccb(ccb);
1391                         kfree(mode_buffer, M_SCSICH);
1392                         return(error);
1393                 }
1394         }
1395
1396         ea = (struct page_element_address_assignment *)
1397                 find_mode_page_6((struct scsi_mode_header_6 *)mode_buffer);
1398
1399         softc->sc_firsts[CHET_MT] = scsi_2btoul(ea->mtea);
1400         softc->sc_counts[CHET_MT] = scsi_2btoul(ea->nmte);
1401         softc->sc_firsts[CHET_ST] = scsi_2btoul(ea->fsea);
1402         softc->sc_counts[CHET_ST] = scsi_2btoul(ea->nse);
1403         softc->sc_firsts[CHET_IE] = scsi_2btoul(ea->fieea);
1404         softc->sc_counts[CHET_IE] = scsi_2btoul(ea->niee);
1405         softc->sc_firsts[CHET_DT] = scsi_2btoul(ea->fdtea);
1406         softc->sc_counts[CHET_DT] = scsi_2btoul(ea->ndte);
1407
1408         bzero(mode_buffer, mode_buffer_len);
1409
1410         /*
1411          * Now get the device capabilities page.
1412          */
1413         scsi_mode_sense(&ccb->csio,
1414                         /* retries */ 1,
1415                         /* cbfcnp */ chdone,
1416                         /* tag_action */ MSG_SIMPLE_Q_TAG,
1417                         /* dbd */ dbd,
1418                         /* page_code */ SMS_PAGE_CTRL_CURRENT,
1419                         /* page */ CH_DEVICE_CAP_PAGE,
1420                         /* param_buf */ (u_int8_t *)mode_buffer,
1421                         /* param_len */ mode_buffer_len,
1422                         /* sense_len */ SSD_FULL_SIZE,
1423                         /* timeout */ CH_TIMEOUT_MODE_SENSE);
1424
1425         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1426                                   /* sense_flags */ SF_RETRY_UA | SF_NO_PRINT,
1427                                   &softc->device_stats);
1428
1429         if (error) {
1430                 if (dbd) {
1431                         struct scsi_mode_sense_6 *sms;
1432
1433                         sms = (struct scsi_mode_sense_6 *)
1434                                 ccb->csio.cdb_io.cdb_bytes;
1435
1436                         sms->byte2 &= ~SMS_DBD;
1437                         error = cam_periph_runccb(ccb, cherror,
1438                                                   /*cam_flags*/ CAM_RETRY_SELTO,
1439                                                   /*sense_flags*/ SF_RETRY_UA,
1440                                                   &softc->device_stats);
1441                 } else {
1442                         /*
1443                          * Since we disabled sense printing above, print
1444                          * out the sense here since we got an error.
1445                          */
1446                         scsi_sense_print(&ccb->csio);
1447                 }
1448
1449                 if (error) {
1450                         xpt_print(periph->path,
1451                             "chgetparams: error getting device "
1452                             "capabilities page\n");
1453                         xpt_release_ccb(ccb);
1454                         kfree(mode_buffer, M_SCSICH);
1455                         return(error);
1456                 }
1457         }
1458
1459         xpt_release_ccb(ccb);
1460
1461         cap = (struct page_device_capabilities *)
1462                 find_mode_page_6((struct scsi_mode_header_6 *)mode_buffer);
1463
1464         bzero(softc->sc_movemask, sizeof(softc->sc_movemask));
1465         bzero(softc->sc_exchangemask, sizeof(softc->sc_exchangemask));
1466         moves = cap->move_from;
1467         exchanges = cap->exchange_with;
1468         for (from = CHET_MT; from <= CHET_MAX; ++from) {
1469                 softc->sc_movemask[from] = moves[from];
1470                 softc->sc_exchangemask[from] = exchanges[from];
1471         }
1472
1473         kfree(mode_buffer, M_SCSICH);
1474
1475         return(error);
1476 }
1477
1478 void
1479 scsi_move_medium(struct ccb_scsiio *csio, u_int32_t retries,
1480                  void (*cbfcnp)(struct cam_periph *, union ccb *),
1481                  u_int8_t tag_action, u_int32_t tea, u_int32_t src,
1482                  u_int32_t dst, int invert, u_int8_t sense_len,
1483                  u_int32_t timeout)
1484 {
1485         struct scsi_move_medium *scsi_cmd;
1486
1487         scsi_cmd = (struct scsi_move_medium *)&csio->cdb_io.cdb_bytes;
1488         bzero(scsi_cmd, sizeof(*scsi_cmd));
1489
1490         scsi_cmd->opcode = MOVE_MEDIUM;
1491
1492         scsi_ulto2b(tea, scsi_cmd->tea);
1493         scsi_ulto2b(src, scsi_cmd->src);
1494         scsi_ulto2b(dst, scsi_cmd->dst);
1495
1496         if (invert)
1497                 scsi_cmd->invert |= MOVE_MEDIUM_INVERT;
1498
1499         cam_fill_csio(csio,
1500                       retries,
1501                       cbfcnp,
1502                       /*flags*/ CAM_DIR_NONE,
1503                       tag_action,
1504                       /*data_ptr*/ NULL,
1505                       /*dxfer_len*/ 0,
1506                       sense_len,
1507                       sizeof(*scsi_cmd),
1508                       timeout);
1509 }
1510
1511 void
1512 scsi_exchange_medium(struct ccb_scsiio *csio, u_int32_t retries,
1513                      void (*cbfcnp)(struct cam_periph *, union ccb *),
1514                      u_int8_t tag_action, u_int32_t tea, u_int32_t src,
1515                      u_int32_t dst1, u_int32_t dst2, int invert1,
1516                      int invert2, u_int8_t sense_len, u_int32_t timeout)
1517 {
1518         struct scsi_exchange_medium *scsi_cmd;
1519
1520         scsi_cmd = (struct scsi_exchange_medium *)&csio->cdb_io.cdb_bytes;
1521         bzero(scsi_cmd, sizeof(*scsi_cmd));
1522
1523         scsi_cmd->opcode = EXCHANGE_MEDIUM;
1524
1525         scsi_ulto2b(tea, scsi_cmd->tea);
1526         scsi_ulto2b(src, scsi_cmd->src);
1527         scsi_ulto2b(dst1, scsi_cmd->fdst);
1528         scsi_ulto2b(dst2, scsi_cmd->sdst);
1529
1530         if (invert1)
1531                 scsi_cmd->invert |= EXCHANGE_MEDIUM_INV1;
1532
1533         if (invert2)
1534                 scsi_cmd->invert |= EXCHANGE_MEDIUM_INV2;
1535
1536         cam_fill_csio(csio,
1537                       retries,
1538                       cbfcnp,
1539                       /*flags*/ CAM_DIR_NONE,
1540                       tag_action,
1541                       /*data_ptr*/ NULL,
1542                       /*dxfer_len*/ 0,
1543                       sense_len,
1544                       sizeof(*scsi_cmd),
1545                       timeout);
1546 }
1547
1548 void
1549 scsi_position_to_element(struct ccb_scsiio *csio, u_int32_t retries,
1550                          void (*cbfcnp)(struct cam_periph *, union ccb *),
1551                          u_int8_t tag_action, u_int32_t tea, u_int32_t dst,
1552                          int invert, u_int8_t sense_len, u_int32_t timeout)
1553 {
1554         struct scsi_position_to_element *scsi_cmd;
1555
1556         scsi_cmd = (struct scsi_position_to_element *)&csio->cdb_io.cdb_bytes;
1557         bzero(scsi_cmd, sizeof(*scsi_cmd));
1558
1559         scsi_cmd->opcode = POSITION_TO_ELEMENT;
1560
1561         scsi_ulto2b(tea, scsi_cmd->tea);
1562         scsi_ulto2b(dst, scsi_cmd->dst);
1563
1564         if (invert)
1565                 scsi_cmd->invert |= POSITION_TO_ELEMENT_INVERT;
1566
1567         cam_fill_csio(csio,
1568                       retries,
1569                       cbfcnp,
1570                       /*flags*/ CAM_DIR_NONE,
1571                       tag_action,
1572                       /*data_ptr*/ NULL,
1573                       /*dxfer_len*/ 0,
1574                       sense_len,
1575                       sizeof(*scsi_cmd),
1576                       timeout);
1577 }
1578
1579 void
1580 scsi_read_element_status(struct ccb_scsiio *csio, u_int32_t retries,
1581                          void (*cbfcnp)(struct cam_periph *, union ccb *),
1582                          u_int8_t tag_action, int voltag, u_int32_t sea,
1583                          u_int32_t count, u_int8_t *data_ptr,
1584                          u_int32_t dxfer_len, u_int8_t sense_len,
1585                          u_int32_t timeout)
1586 {
1587         struct scsi_read_element_status *scsi_cmd;
1588
1589         scsi_cmd = (struct scsi_read_element_status *)&csio->cdb_io.cdb_bytes;
1590         bzero(scsi_cmd, sizeof(*scsi_cmd));
1591
1592         scsi_cmd->opcode = READ_ELEMENT_STATUS;
1593
1594         scsi_ulto2b(sea, scsi_cmd->sea);
1595         scsi_ulto2b(count, scsi_cmd->count);
1596         scsi_ulto3b(dxfer_len, scsi_cmd->len);
1597
1598         if (voltag)
1599                 scsi_cmd->byte2 |= READ_ELEMENT_STATUS_VOLTAG;
1600
1601         cam_fill_csio(csio,
1602                       retries,
1603                       cbfcnp,
1604                       /*flags*/ CAM_DIR_IN,
1605                       tag_action,
1606                       data_ptr,
1607                       dxfer_len,
1608                       sense_len,
1609                       sizeof(*scsi_cmd),
1610                       timeout);
1611 }
1612
1613 void
1614 scsi_initialize_element_status(struct ccb_scsiio *csio, u_int32_t retries,
1615                                void (*cbfcnp)(struct cam_periph *, union ccb *),
1616                                u_int8_t tag_action, u_int8_t sense_len,
1617                                u_int32_t timeout)
1618 {
1619         struct scsi_initialize_element_status *scsi_cmd;
1620
1621         scsi_cmd = (struct scsi_initialize_element_status *)
1622                     &csio->cdb_io.cdb_bytes;
1623         bzero(scsi_cmd, sizeof(*scsi_cmd));
1624
1625         scsi_cmd->opcode = INITIALIZE_ELEMENT_STATUS;
1626
1627         cam_fill_csio(csio,
1628                       retries,
1629                       cbfcnp,
1630                       /*flags*/ CAM_DIR_NONE,
1631                       tag_action,
1632                       /* data_ptr */ NULL,
1633                       /* dxfer_len */ 0,
1634                       sense_len,
1635                       sizeof(*scsi_cmd),
1636                       timeout);
1637 }
1638
1639 void
1640 scsi_send_volume_tag(struct ccb_scsiio *csio, u_int32_t retries,
1641                      void (*cbfcnp)(struct cam_periph *, union ccb *),
1642                      u_int8_t tag_action,
1643                      u_int16_t element_address,
1644                      u_int8_t send_action_code,
1645                      struct scsi_send_volume_tag_parameters *parameters,
1646                      u_int8_t sense_len, u_int32_t timeout)
1647 {
1648         struct scsi_send_volume_tag *scsi_cmd;
1649
1650         scsi_cmd = (struct scsi_send_volume_tag *) &csio->cdb_io.cdb_bytes;
1651         bzero(scsi_cmd, sizeof(*scsi_cmd));
1652
1653         scsi_cmd->opcode = SEND_VOLUME_TAG;
1654         scsi_ulto2b(element_address, scsi_cmd->ea);
1655         scsi_cmd->sac = send_action_code;
1656         scsi_ulto2b(sizeof(*parameters), scsi_cmd->pll);
1657
1658         cam_fill_csio(csio,
1659                       retries,
1660                       cbfcnp,
1661                       /*flags*/ CAM_DIR_OUT,
1662                       tag_action,
1663                       /* data_ptr */ (u_int8_t *) parameters,
1664                       sizeof(*parameters),
1665                       sense_len,
1666                       sizeof(*scsi_cmd),
1667                       timeout);
1668 }