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 1.27 2008/05/18 20:30:20 pavalos 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_unlock(periph);
 428                 cam_periph_release(periph);
 429                 return(error);
 430         }
 431
 432         cam_periph_unhold(periph);
 433         cam_periph_unlock(periph);
 434
 435         return(error);
 436 }
 437
 438 static int
 439 chclose(struct dev_close_args *ap)
 440 {
 441         cdev_t dev = ap->a_head.a_dev;
 442         struct  cam_periph *periph;
 443         struct  ch_softc *softc;
 444         int     unit, error;
 445
 446         error = 0;
 447
 448         unit = CHUNIT(dev);
 449         periph = cam_extend_get(chperiphs, unit);
 450         if (periph == NULL)
 451                 return(ENXIO);
 452
 453         softc = (struct ch_softc *)periph->softc;
 454
 455         cam_periph_lock(periph);
 456
 457         softc->flags &= ~CH_FLAG_OPEN;
 458
 459         cam_periph_unlock(periph);
 460         cam_periph_release(periph);
 461
 462         return(0);
 463 }
 464
 465 static void
 466 chstart(struct cam_periph *periph, union ccb *start_ccb)
 467 {
 468         struct ch_softc *softc;
 469
 470         softc = (struct ch_softc *)periph->softc;
 471
 472         switch (softc->state) {
 473         case CH_STATE_NORMAL:
 474         {
 475                 if (periph->immediate_priority <= periph->pinfo.priority){
 476                         start_ccb->ccb_h.ccb_state = CH_CCB_WAITING;
 477
 478                         SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
 479                                           periph_links.sle);
 480                         periph->immediate_priority = CAM_PRIORITY_NONE;
 481                         wakeup(&periph->ccb_list);
 482                 }
 483                 break;
 484         }
 485         case CH_STATE_PROBE:
 486         {
 487                 int mode_buffer_len;
 488                 void *mode_buffer;
 489
 490                 /*
 491                  * Include the block descriptor when calculating the mode
 492                  * buffer length,
 493                  */
 494                 mode_buffer_len = sizeof(struct scsi_mode_header_6) +
 495                                   sizeof(struct scsi_mode_blk_desc) +
 496                                  sizeof(struct page_element_address_assignment);
 497
 498                 mode_buffer = kmalloc(mode_buffer_len, M_SCSICH, M_INTWAIT | M_ZERO);
 499                 /*
 500                  * Get the element address assignment page.
 501                  */
 502                 scsi_mode_sense(&start_ccb->csio,
 503                                 /* retries */ 1,
 504                                 /* cbfcnp */ chdone,
 505                                 /* tag_action */ MSG_SIMPLE_Q_TAG,
 506                                 /* dbd */ (softc->quirks & CH_Q_NO_DBD) ?
 507                                         FALSE : TRUE,
 508                                 /* page_code */ SMS_PAGE_CTRL_CURRENT,
 509                                 /* page */ CH_ELEMENT_ADDR_ASSIGN_PAGE,
 510                                 /* param_buf */ (u_int8_t *)mode_buffer,
 511                                 /* param_len */ mode_buffer_len,
 512                                 /* sense_len */ SSD_FULL_SIZE,
 513                                 /* timeout */ CH_TIMEOUT_MODE_SENSE);
 514
 515                 start_ccb->ccb_h.ccb_bio = NULL;
 516                 start_ccb->ccb_h.ccb_state = CH_CCB_PROBE;
 517                 xpt_action(start_ccb);
 518                 break;
 519         }
 520         }
 521 }
 522
 523 static void
 524 chdone(struct cam_periph *periph, union ccb *done_ccb)
 525 {
 526         struct ch_softc *softc;
 527         struct ccb_scsiio *csio;
 528
 529         softc = (struct ch_softc *)periph->softc;
 530         csio = &done_ccb->csio;
 531
 532         switch(done_ccb->ccb_h.ccb_state) {
 533         case CH_CCB_PROBE:
 534         {
 535                 struct scsi_mode_header_6 *mode_header;
 536                 struct page_element_address_assignment *ea;
 537                 char announce_buf[80];
 538
 539
 540                 mode_header = (struct scsi_mode_header_6 *)csio->data_ptr;
 541
 542                 ea = (struct page_element_address_assignment *)
 543                         find_mode_page_6(mode_header);
 544
 545                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP){
 546
 547                         softc->sc_firsts[CHET_MT] = scsi_2btoul(ea->mtea);
 548                         softc->sc_counts[CHET_MT] = scsi_2btoul(ea->nmte);
 549                         softc->sc_firsts[CHET_ST] = scsi_2btoul(ea->fsea);
 550                         softc->sc_counts[CHET_ST] = scsi_2btoul(ea->nse);
 551                         softc->sc_firsts[CHET_IE] = scsi_2btoul(ea->fieea);
 552                         softc->sc_counts[CHET_IE] = scsi_2btoul(ea->niee);
 553                         softc->sc_firsts[CHET_DT] = scsi_2btoul(ea->fdtea);
 554                         softc->sc_counts[CHET_DT] = scsi_2btoul(ea->ndte);
 555                         softc->sc_picker = softc->sc_firsts[CHET_MT];
 556
 557 #define PLURAL(c)       (c) == 1 ? "" : "s"
 558                         ksnprintf(announce_buf, sizeof(announce_buf),
 559                                 "%d slot%s, %d drive%s, "
 560                                 "%d picker%s, %d portal%s",
 561                                 softc->sc_counts[CHET_ST],
 562                                 PLURAL(softc->sc_counts[CHET_ST]),
 563                                 softc->sc_counts[CHET_DT],
 564                                 PLURAL(softc->sc_counts[CHET_DT]),
 565                                 softc->sc_counts[CHET_MT],
 566                                 PLURAL(softc->sc_counts[CHET_MT]),
 567                                 softc->sc_counts[CHET_IE],
 568                                 PLURAL(softc->sc_counts[CHET_IE]));
 569 #undef PLURAL
 570                 } else {
 571                         int error;
 572
 573                         error = cherror(done_ccb, CAM_RETRY_SELTO,
 574                                         SF_RETRY_UA | SF_NO_PRINT);
 575                         /*
 576                          * Retry any UNIT ATTENTION type errors.  They
 577                          * are expected at boot.
 578                          */
 579                         if (error == ERESTART) {
 580                                 /*
 581                                  * A retry was scheuled, so
 582                                  * just return.
 583                                  */
 584                                 return;
 585                         } else if (error != 0) {
 586                                 int retry_scheduled;
 587                                 struct scsi_mode_sense_6 *sms;
 588
 589                                 sms = (struct scsi_mode_sense_6 *)
 590                                         done_ccb->csio.cdb_io.cdb_bytes;
 591
 592                                 /*
 593                                  * Check to see if block descriptors were
 594                                  * disabled.  Some devices don't like that.
 595                                  * We're taking advantage of the fact that
 596                                  * the first few bytes of the 6 and 10 byte
 597                                  * mode sense commands are the same.  If
 598                                  * block descriptors were disabled, enable
 599                                  * them and re-send the command.
 600                                  */
 601                                 if (sms->byte2 & SMS_DBD) {
 602                                         sms->byte2 &= ~SMS_DBD;
 603                                         xpt_action(done_ccb);
 604                                         softc->quirks |= CH_Q_NO_DBD;
 605                                         retry_scheduled = 1;
 606                                 } else
 607                                         retry_scheduled = 0;
 608
 609                                 /* Don't wedge this device's queue */
 610                                 cam_release_devq(done_ccb->ccb_h.path,
 611                                                  /*relsim_flags*/0,
 612                                                  /*reduction*/0,
 613                                                  /*timeout*/0,
 614                                                  /*getcount_only*/0);
 615
 616                                 if (retry_scheduled)
 617                                         return;
 618
 619                                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK)
 620                                     == CAM_SCSI_STATUS_ERROR)
 621                                         scsi_sense_print(&done_ccb->csio);
 622                                 else {
 623                                         xpt_print(periph->path,
 624                                             "got CAM status %#x\n",
 625                                             done_ccb->ccb_h.status);
 626                                 }
 627                                 xpt_print(periph->path, "fatal error, failed "
 628                                     "to attach to device\n");
 629
 630                                 cam_periph_invalidate(periph);
 631
 632                                 announce_buf[0] = '\0';
 633                         }
 634                 }
 635                 if (announce_buf[0] != '\0')
 636                         xpt_announce_periph(periph, announce_buf);
 637                 softc->state = CH_STATE_NORMAL;
 638                 kfree(mode_header, M_SCSICH);
 639                 /*
 640                  * Since our peripheral may be invalidated by an error
 641                  * above or an external event, we must release our CCB
 642                  * before releasing the probe lock on the peripheral.
 643                  * The peripheral will only go away once the last lock
 644                  * is removed, and we need it around for the CCB release
 645                  * operation.
 646                  */
 647                 xpt_release_ccb(done_ccb);
 648                 cam_periph_unhold(periph);
 649                 return;
 650         }
 651         case CH_CCB_WAITING:
 652         {
 653                 /* Caller will release the CCB */
 654                 wakeup(&done_ccb->ccb_h.cbfcnp);
 655                 return;
 656         }
 657         default:
 658                 break;
 659         }
 660         xpt_release_ccb(done_ccb);
 661 }
 662
 663 static int
 664 cherror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
 665 {
 666         struct ch_softc *softc;
 667         struct cam_periph *periph;
 668
 669         periph = xpt_path_periph(ccb->ccb_h.path);
 670         softc = (struct ch_softc *)periph->softc;
 671
 672         return (cam_periph_error(ccb, cam_flags, sense_flags,
 673                                  &softc->saved_ccb));
 674 }
 675
 676 static int
 677 chioctl(struct dev_ioctl_args *ap)
 678 {
 679         cdev_t dev = ap->a_head.a_dev;
 680         caddr_t addr = ap->a_data;
 681         int flag = ap->a_fflag;
 682         struct cam_periph *periph;
 683         struct ch_softc *softc;
 684         u_int8_t unit;
 685         int error;
 686
 687         unit = CHUNIT(dev);
 688
 689         periph = cam_extend_get(chperiphs, unit);
 690         if (periph == NULL)
 691                 return(ENXIO);
 692
 693         cam_periph_lock(periph);
 694         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering chioctl\n"));
 695
 696         softc = (struct ch_softc *)periph->softc;
 697
 698         error = 0;
 699
 700         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
 701                   ("trying to do ioctl %#lx\n", ap->a_cmd));
 702
 703         /*
 704          * If this command can change the device's state, we must
 705          * have the device open for writing.
 706          */
 707         switch (ap->a_cmd) {
 708         case CHIOGPICKER:
 709         case CHIOGPARAMS:
 710         case CHIOGSTATUS:
 711                 break;
 712
 713         default:
 714                 if ((flag & FWRITE) == 0) {
 715                         cam_periph_unlock(periph);
 716                         return (EBADF);
 717                 }
 718         }
 719
 720         switch (ap->a_cmd) {
 721         case CHIOMOVE:
 722                 error = chmove(periph, (struct changer_move *)addr);
 723                 break;
 724
 725         case CHIOEXCHANGE:
 726                 error = chexchange(periph, (struct changer_exchange *)addr);
 727                 break;
 728
 729         case CHIOPOSITION:
 730                 error = chposition(periph, (struct changer_position *)addr);
 731                 break;
 732
 733         case CHIOGPICKER:
 734                 *(int *)addr = softc->sc_picker - softc->sc_firsts[CHET_MT];
 735                 break;
 736
 737         case CHIOSPICKER:
 738         {
 739                 int new_picker = *(int *)addr;
 740
 741                 if (new_picker > (softc->sc_counts[CHET_MT] - 1)) {
 742                         error = EINVAL;
 743                         break;
 744                 }
 745                 softc->sc_picker = softc->sc_firsts[CHET_MT] + new_picker;
 746                 break;
 747         }
 748         case CHIOGPARAMS:
 749         {
 750                 struct changer_params *cp = (struct changer_params *)addr;
 751
 752                 cp->cp_npickers = softc->sc_counts[CHET_MT];
 753                 cp->cp_nslots = softc->sc_counts[CHET_ST];
 754                 cp->cp_nportals = softc->sc_counts[CHET_IE];
 755                 cp->cp_ndrives = softc->sc_counts[CHET_DT];
 756                 break;
 757         }
 758         case CHIOIELEM:
 759                 error = chielem(periph, *(unsigned int *)addr);
 760                 break;
 761
 762         case CHIOGSTATUS:
 763         {
 764                 error = chgetelemstatus(periph,
 765                                (struct changer_element_status_request *) addr);
 766                 break;
 767         }
 768
 769         case CHIOSETVOLTAG:
 770         {
 771                 error = chsetvoltag(periph,
 772                                     (struct changer_set_voltag_request *) addr);
 773                 break;
 774         }
 775
 776         /* Implement prevent/allow? */
 777
 778         default:
 779                 error = cam_periph_ioctl(periph, ap->a_cmd, addr, cherror);
 780                 break;
 781         }
 782
 783         cam_periph_unlock(periph);
 784         return (error);
 785 }
 786
 787 static int
 788 chmove(struct cam_periph *periph, struct changer_move *cm)
 789 {
 790         struct ch_softc *softc;
 791         u_int16_t fromelem, toelem;
 792         union ccb *ccb;
 793         int error;
 794
 795         error = 0;
 796         softc = (struct ch_softc *)periph->softc;
 797
 798         /*
 799          * Check arguments.
 800          */
 801         if ((cm->cm_fromtype > CHET_DT) || (cm->cm_totype > CHET_DT))
 802                 return (EINVAL);
 803         if ((cm->cm_fromunit > (softc->sc_counts[cm->cm_fromtype] - 1)) ||
 804             (cm->cm_tounit > (softc->sc_counts[cm->cm_totype] - 1)))
 805                 return (ENODEV);
 806
 807         /*
 808          * Check the request against the changer's capabilities.
 809          */
 810         if ((softc->sc_movemask[cm->cm_fromtype] & (1 << cm->cm_totype)) == 0)
 811                 return (ENODEV);
 812
 813         /*
 814          * Calculate the source and destination elements.
 815          */
 816         fromelem = softc->sc_firsts[cm->cm_fromtype] + cm->cm_fromunit;
 817         toelem = softc->sc_firsts[cm->cm_totype] + cm->cm_tounit;
 818
 819         ccb = cam_periph_getccb(periph, /*priority*/ 1);
 820
 821         scsi_move_medium(&ccb->csio,
 822                          /* retries */ 1,
 823                          /* cbfcnp */ chdone,
 824                          /* tag_action */ MSG_SIMPLE_Q_TAG,
 825                          /* tea */ softc->sc_picker,
 826                          /* src */ fromelem,
 827                          /* dst */ toelem,
 828                          /* invert */ (cm->cm_flags & CM_INVERT) ? TRUE : FALSE,
 829                          /* sense_len */ SSD_FULL_SIZE,
 830                          /* timeout */ CH_TIMEOUT_MOVE_MEDIUM);
 831
 832         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/CAM_RETRY_SELTO,
 833                                   /*sense_flags*/ SF_RETRY_UA,
 834                                   &softc->device_stats);
 835
 836         xpt_release_ccb(ccb);
 837
 838         return(error);
 839 }
 840
 841 static int
 842 chexchange(struct cam_periph *periph, struct changer_exchange *ce)
 843 {
 844         struct ch_softc *softc;
 845         u_int16_t src, dst1, dst2;
 846         union ccb *ccb;
 847         int error;
 848
 849         error = 0;
 850         softc = (struct ch_softc *)periph->softc;
 851         /*
 852          * Check arguments.
 853          */
 854         if ((ce->ce_srctype > CHET_DT) || (ce->ce_fdsttype > CHET_DT) ||
 855             (ce->ce_sdsttype > CHET_DT))
 856                 return (EINVAL);
 857         if ((ce->ce_srcunit > (softc->sc_counts[ce->ce_srctype] - 1)) ||
 858             (ce->ce_fdstunit > (softc->sc_counts[ce->ce_fdsttype] - 1)) ||
 859             (ce->ce_sdstunit > (softc->sc_counts[ce->ce_sdsttype] - 1)))
 860                 return (ENODEV);
 861
 862         /*
 863          * Check the request against the changer's capabilities.
 864          */
 865         if (((softc->sc_exchangemask[ce->ce_srctype] &
 866              (1 << ce->ce_fdsttype)) == 0) ||
 867             ((softc->sc_exchangemask[ce->ce_fdsttype] &
 868              (1 << ce->ce_sdsttype)) == 0))
 869                 return (ENODEV);
 870
 871         /*
 872          * Calculate the source and destination elements.
 873          */
 874         src = softc->sc_firsts[ce->ce_srctype] + ce->ce_srcunit;
 875         dst1 = softc->sc_firsts[ce->ce_fdsttype] + ce->ce_fdstunit;
 876         dst2 = softc->sc_firsts[ce->ce_sdsttype] + ce->ce_sdstunit;
 877
 878         ccb = cam_periph_getccb(periph, /*priority*/ 1);
 879
 880         scsi_exchange_medium(&ccb->csio,
 881                              /* retries */ 1,
 882                              /* cbfcnp */ chdone,
 883                              /* tag_action */ MSG_SIMPLE_Q_TAG,
 884                              /* tea */ softc->sc_picker,
 885                              /* src */ src,
 886                              /* dst1 */ dst1,
 887                              /* dst2 */ dst2,
 888                              /* invert1 */ (ce->ce_flags & CE_INVERT1) ?
 889                                            TRUE : FALSE,
 890                              /* invert2 */ (ce->ce_flags & CE_INVERT2) ?
 891                                            TRUE : FALSE,
 892                              /* sense_len */ SSD_FULL_SIZE,
 893                              /* timeout */ CH_TIMEOUT_EXCHANGE_MEDIUM);
 894
 895         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/CAM_RETRY_SELTO,
 896                                   /*sense_flags*/ SF_RETRY_UA,
 897                                   &softc->device_stats);
 898
 899         xpt_release_ccb(ccb);
 900
 901         return(error);
 902 }
 903
 904 static int
 905 chposition(struct cam_periph *periph, struct changer_position *cp)
 906 {
 907         struct ch_softc *softc;
 908         u_int16_t dst;
 909         union ccb *ccb;
 910         int error;
 911
 912         error = 0;
 913         softc = (struct ch_softc *)periph->softc;
 914
 915         /*
 916          * Check arguments.
 917          */
 918         if (cp->cp_type > CHET_DT)
 919                 return (EINVAL);
 920         if (cp->cp_unit > (softc->sc_counts[cp->cp_type] - 1))
 921                 return (ENODEV);
 922
 923         /*
 924          * Calculate the destination element.
 925          */
 926         dst = softc->sc_firsts[cp->cp_type] + cp->cp_unit;
 927
 928         ccb = cam_periph_getccb(periph, /*priority*/ 1);
 929
 930         scsi_position_to_element(&ccb->csio,
 931                                  /* retries */ 1,
 932                                  /* cbfcnp */ chdone,
 933                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
 934                                  /* tea */ softc->sc_picker,
 935                                  /* dst */ dst,
 936                                  /* invert */ (cp->cp_flags & CP_INVERT) ?
 937                                               TRUE : FALSE,
 938                                  /* sense_len */ SSD_FULL_SIZE,
 939                                  /* timeout */ CH_TIMEOUT_POSITION_TO_ELEMENT);
 940
 941         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
 942                                   /*sense_flags*/ SF_RETRY_UA,
 943                                   &softc->device_stats);
 944
 945         xpt_release_ccb(ccb);
 946
 947         return(error);
 948 }
 949
 950 /*
 951  * Copy a volume tag to a volume_tag struct, converting SCSI byte order
 952  * to host native byte order in the volume serial number.  The volume
 953  * label as returned by the changer is transferred to user mode as
 954  * nul-terminated string.  Volume labels are truncated at the first
 955  * space, as suggested by SCSI-2.
 956  */
 957 static  void
 958 copy_voltag(struct changer_voltag *uvoltag, struct volume_tag *voltag)
 959 {
 960         int i;
 961         for (i=0; i<CH_VOLTAG_MAXLEN; i++) {
 962                 char c = voltag->vif[i];
 963                 if (c && c != ' ')
 964                         uvoltag->cv_volid[i] = c;
 965                 else
 966                         break;
 967         }
 968         uvoltag->cv_serial = scsi_2btoul(voltag->vsn);
 969 }
 970
 971 /*
 972  * Copy an an element status descriptor to a user-mode
 973  * changer_element_status structure.
 974  */
 975
 976 static  void
 977 copy_element_status(struct ch_softc *softc,
 978                     u_int16_t flags,
 979                     struct read_element_status_descriptor *desc,
 980                     struct changer_element_status *ces)
 981 {
 982         u_int16_t eaddr = scsi_2btoul(desc->eaddr);
 983         u_int16_t et;
 984
 985         ces->ces_int_addr = eaddr;
 986         /* set up logical address in element status */
 987         for (et = CHET_MT; et <= CHET_DT; et++) {
 988                 if ((softc->sc_firsts[et] <= eaddr)
 989                     && ((softc->sc_firsts[et] + softc->sc_counts[et])
 990                         > eaddr)) {
 991                         ces->ces_addr = eaddr - softc->sc_firsts[et];
 992                         ces->ces_type = et;
 993                         break;
 994                 }
 995         }
 996
 997         ces->ces_flags = desc->flags1;
 998
 999         ces->ces_sensecode = desc->sense_code;
1000         ces->ces_sensequal = desc->sense_qual;
1001
1002         if (desc->flags2 & READ_ELEMENT_STATUS_INVERT)
1003                 ces->ces_flags |= CES_INVERT;
1004
1005         if (desc->flags2 & READ_ELEMENT_STATUS_SVALID) {
1006
1007                 eaddr = scsi_2btoul(desc->ssea);
1008
1009                 /* convert source address to logical format */
1010                 for (et = CHET_MT; et <= CHET_DT; et++) {
1011                         if ((softc->sc_firsts[et] <= eaddr)
1012                             && ((softc->sc_firsts[et] + softc->sc_counts[et])
1013                                 > eaddr)) {
1014                                 ces->ces_source_addr =
1015                                         eaddr - softc->sc_firsts[et];
1016                                 ces->ces_source_type = et;
1017                                 ces->ces_flags |= CES_SOURCE_VALID;
1018                                 break;
1019                         }
1020                 }
1021
1022                 if (!(ces->ces_flags & CES_SOURCE_VALID))
1023                         kprintf("ch: warning: could not map element source "
1024                                "address %ud to a valid element type\n",
1025                                eaddr);
1026         }
1027
1028
1029         if (flags & READ_ELEMENT_STATUS_PVOLTAG)
1030                 copy_voltag(&(ces->ces_pvoltag), &(desc->pvoltag));
1031         if (flags & READ_ELEMENT_STATUS_AVOLTAG)
1032                 copy_voltag(&(ces->ces_avoltag), &(desc->avoltag));
1033
1034         if (desc->dt_scsi_flags & READ_ELEMENT_STATUS_DT_IDVALID) {
1035                 ces->ces_flags |= CES_SCSIID_VALID;
1036                 ces->ces_scsi_id = desc->dt_scsi_addr;
1037         }
1038
1039         if (desc->dt_scsi_addr & READ_ELEMENT_STATUS_DT_LUVALID) {
1040                 ces->ces_flags |= CES_LUN_VALID;
1041                 ces->ces_scsi_lun =
1042                         desc->dt_scsi_flags & READ_ELEMENT_STATUS_DT_LUNMASK;
1043         }
1044 }
1045
1046 static int
1047 chgetelemstatus(struct cam_periph *periph,
1048                 struct changer_element_status_request *cesr)
1049 {
1050         struct read_element_status_header *st_hdr;
1051         struct read_element_status_page_header *pg_hdr;
1052         struct read_element_status_descriptor *desc;
1053         caddr_t data = NULL;
1054         size_t size, desclen;
1055         int avail, i, error = 0;
1056         struct changer_element_status *user_data = NULL;
1057         struct ch_softc *softc;
1058         union ccb *ccb;
1059         int chet = cesr->cesr_element_type;
1060         int want_voltags = (cesr->cesr_flags & CESR_VOLTAGS) ? 1 : 0;
1061
1062         softc = (struct ch_softc *)periph->softc;
1063
1064         /* perform argument checking */
1065
1066         /*
1067          * Perform a range check on the cesr_element_{base,count}
1068          * request argument fields.
1069          */
1070         if ((softc->sc_counts[chet] - cesr->cesr_element_base) <= 0
1071             || (cesr->cesr_element_base + cesr->cesr_element_count)
1072                 > softc->sc_counts[chet])
1073                 return (EINVAL);
1074
1075         /*
1076          * Request one descriptor for the given element type.  This
1077          * is used to determine the size of the descriptor so that
1078          * we can allocate enough storage for all of them.  We assume
1079          * that the first one can fit into 1k.
1080          */
1081         cam_periph_unlock(periph);
1082         data = (caddr_t)kmalloc(1024, M_DEVBUF, M_INTWAIT);
1083
1084         cam_periph_lock(periph);
1085         ccb = cam_periph_getccb(periph, /*priority*/ 1);
1086
1087         scsi_read_element_status(&ccb->csio,
1088                                  /* retries */ 1,
1089                                  /* cbfcnp */ chdone,
1090                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
1091                                  /* voltag */ want_voltags,
1092                                  /* sea */ softc->sc_firsts[chet],
1093                                  /* count */ 1,
1094                                  /* data_ptr */ data,
1095                                  /* dxfer_len */ 1024,
1096                                  /* sense_len */ SSD_FULL_SIZE,
1097                                  /* timeout */ CH_TIMEOUT_READ_ELEMENT_STATUS);
1098
1099         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1100                                   /*sense_flags*/ SF_RETRY_UA,
1101                                   &softc->device_stats);
1102
1103         if (error)
1104                 goto done;
1105         cam_periph_unlock(periph);
1106
1107         st_hdr = (struct read_element_status_header *)data;
1108         pg_hdr = (struct read_element_status_page_header *)((uintptr_t)st_hdr +
1109                   sizeof(struct read_element_status_header));
1110         desclen = scsi_2btoul(pg_hdr->edl);
1111
1112         size = sizeof(struct read_element_status_header) +
1113                sizeof(struct read_element_status_page_header) +
1114                (desclen * cesr->cesr_element_count);
1115
1116         /*
1117          * Reallocate storage for descriptors and get them from the
1118          * device.
1119          */
1120         kfree(data, M_DEVBUF);
1121         data = (caddr_t)kmalloc(size, M_DEVBUF, M_INTWAIT);
1122
1123         cam_periph_lock(periph);
1124         scsi_read_element_status(&ccb->csio,
1125                                  /* retries */ 1,
1126                                  /* cbfcnp */ chdone,
1127                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
1128                                  /* voltag */ want_voltags,
1129                                  /* sea */ softc->sc_firsts[chet]
1130                                  + cesr->cesr_element_base,
1131                                  /* count */ cesr->cesr_element_count,
1132                                  /* data_ptr */ data,
1133                                  /* dxfer_len */ size,
1134                                  /* sense_len */ SSD_FULL_SIZE,
1135                                  /* timeout */ CH_TIMEOUT_READ_ELEMENT_STATUS);
1136
1137         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1138                                   /*sense_flags*/ SF_RETRY_UA,
1139                                   &softc->device_stats);
1140
1141         if (error)
1142                 goto done;
1143         cam_periph_unlock(periph);
1144
1145         /*
1146          * Fill in the user status array.
1147          */
1148         st_hdr = (struct read_element_status_header *)data;
1149         pg_hdr = (struct read_element_status_page_header *)((uintptr_t)st_hdr +
1150                   sizeof(struct read_element_status_header));
1151         avail = scsi_2btoul(st_hdr->count);
1152
1153         if (avail != cesr->cesr_element_count) {
1154                 xpt_print(periph->path,
1155                     "warning, READ ELEMENT STATUS avail != count\n");
1156         }
1157
1158         user_data = (struct changer_element_status *)
1159                 kmalloc(avail * sizeof(struct changer_element_status),
1160                        M_DEVBUF, M_INTWAIT | M_ZERO);
1161
1162         desc = (struct read_element_status_descriptor *)((uintptr_t)data +
1163                 sizeof(struct read_element_status_header) +
1164                 sizeof(struct read_element_status_page_header));
1165         /*
1166          * Set up the individual element status structures
1167          */
1168         for (i = 0; i < avail; ++i) {
1169                 struct changer_element_status *ces = &(user_data[i]);
1170
1171                 copy_element_status(softc, pg_hdr->flags, desc, ces);
1172
1173                 desc = (struct read_element_status_descriptor *)
1174                        ((uintptr_t)desc + desclen);
1175         }
1176
1177         /* Copy element status structures out to userspace. */
1178         error = copyout(user_data,
1179                         cesr->cesr_element_status,
1180                         avail * sizeof(struct changer_element_status));
1181         cam_periph_lock(periph);
1182
1183  done:
1184         xpt_release_ccb(ccb);
1185
1186         if (data != NULL)
1187                 kfree(data, M_DEVBUF);
1188         if (user_data != NULL)
1189                 kfree(user_data, M_DEVBUF);
1190
1191         return (error);
1192 }
1193
1194 static int
1195 chielem(struct cam_periph *periph,
1196         unsigned int timeout)
1197 {
1198         union ccb *ccb;
1199         struct ch_softc *softc;
1200         int error;
1201
1202         if (!timeout) {
1203                 timeout = CH_TIMEOUT_INITIALIZE_ELEMENT_STATUS;
1204         } else {
1205                 timeout *= 1000;
1206         }
1207
1208         error = 0;
1209         softc = (struct ch_softc *)periph->softc;
1210
1211         ccb = cam_periph_getccb(periph, /*priority*/ 1);
1212
1213         scsi_initialize_element_status(&ccb->csio,
1214                                       /* retries */ 1,
1215                                       /* cbfcnp */ chdone,
1216                                       /* tag_action */ MSG_SIMPLE_Q_TAG,
1217                                       /* sense_len */ SSD_FULL_SIZE,
1218                                       /* timeout */ timeout);
1219
1220         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1221                                   /*sense_flags*/ SF_RETRY_UA,
1222                                   &softc->device_stats);
1223
1224         xpt_release_ccb(ccb);
1225
1226         return(error);
1227 }
1228
1229 static int
1230 chsetvoltag(struct cam_periph *periph,
1231             struct changer_set_voltag_request *csvr)
1232 {
1233         union ccb *ccb;
1234         struct ch_softc *softc;
1235         u_int16_t ea;
1236         u_int8_t sac;
1237         struct scsi_send_volume_tag_parameters ssvtp;
1238         int error;
1239         int i;
1240
1241         error = 0;
1242         softc = (struct ch_softc *)periph->softc;
1243
1244         bzero(&ssvtp, sizeof(ssvtp));
1245         for (i=0; i<sizeof(ssvtp.vitf); i++) {
1246                 ssvtp.vitf[i] = ' ';
1247         }
1248
1249         /*
1250          * Check arguments.
1251          */
1252         if (csvr->csvr_type > CHET_DT)
1253                 return EINVAL;
1254         if (csvr->csvr_addr > (softc->sc_counts[csvr->csvr_type] - 1))
1255                 return ENODEV;
1256
1257         ea = softc->sc_firsts[csvr->csvr_type] + csvr->csvr_addr;
1258
1259         if (csvr->csvr_flags & CSVR_ALTERNATE) {
1260                 switch (csvr->csvr_flags & CSVR_MODE_MASK) {
1261                 case CSVR_MODE_SET:
1262                         sac = SEND_VOLUME_TAG_ASSERT_ALTERNATE;
1263                         break;
1264                 case CSVR_MODE_REPLACE:
1265                         sac = SEND_VOLUME_TAG_REPLACE_ALTERNATE;
1266                         break;
1267                 case CSVR_MODE_CLEAR:
1268                         sac = SEND_VOLUME_TAG_UNDEFINED_ALTERNATE;
1269                         break;
1270                 default:
1271                         error = EINVAL;
1272                         goto out;
1273                 }
1274         } else {
1275                 switch (csvr->csvr_flags & CSVR_MODE_MASK) {
1276                 case CSVR_MODE_SET:
1277                         sac = SEND_VOLUME_TAG_ASSERT_PRIMARY;
1278                         break;
1279                 case CSVR_MODE_REPLACE:
1280                         sac = SEND_VOLUME_TAG_REPLACE_PRIMARY;
1281                         break;
1282                 case CSVR_MODE_CLEAR:
1283                         sac = SEND_VOLUME_TAG_UNDEFINED_PRIMARY;
1284                         break;
1285                 default:
1286                         error = EINVAL;
1287                         goto out;
1288                 }
1289         }
1290
1291         memcpy(ssvtp.vitf, csvr->csvr_voltag.cv_volid,
1292                min(strlen(csvr->csvr_voltag.cv_volid), sizeof(ssvtp.vitf)));
1293         scsi_ulto2b(csvr->csvr_voltag.cv_serial, ssvtp.minvsn);
1294
1295         ccb = cam_periph_getccb(periph, /*priority*/ 1);
1296
1297         scsi_send_volume_tag(&ccb->csio,
1298                              /* retries */ 1,
1299                              /* cbfcnp */ chdone,
1300                              /* tag_action */ MSG_SIMPLE_Q_TAG,
1301                              /* element_address */ ea,
1302                              /* send_action_code */ sac,
1303                              /* parameters */ &ssvtp,
1304                              /* sense_len */ SSD_FULL_SIZE,
1305                              /* timeout */ CH_TIMEOUT_SEND_VOLTAG);
1306
1307         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1308                                   /*sense_flags*/ SF_RETRY_UA,
1309                                   &softc->device_stats);
1310
1311         xpt_release_ccb(ccb);
1312
1313  out:
1314         return error;
1315 }
1316
1317 static int
1318 chgetparams(struct cam_periph *periph)
1319 {
1320         union ccb *ccb;
1321         struct ch_softc *softc;
1322         void *mode_buffer;
1323         int mode_buffer_len;
1324         struct page_element_address_assignment *ea;
1325         struct page_device_capabilities *cap;
1326         int error, from, dbd;
1327         u_int8_t *moves, *exchanges;
1328
1329         error = 0;
1330
1331         softc = (struct ch_softc *)periph->softc;
1332
1333         ccb = cam_periph_getccb(periph, /*priority*/ 1);
1334
1335         /*
1336          * The scsi_mode_sense_data structure is just a convenience
1337          * structure that allows us to easily calculate the worst-case
1338          * storage size of the mode sense buffer.
1339          */
1340         mode_buffer_len = sizeof(struct scsi_mode_sense_data);
1341
1342         mode_buffer = kmalloc(mode_buffer_len, M_SCSICH, M_INTWAIT | M_ZERO);
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                         kfree(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                         kfree(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         kfree(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 }