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 1.6 2003/08/07 21:16:44 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/stat.h>
  80 #include <sys/conf.h>
  81 #include <sys/buf.h>
  82 #include <sys/chio.h>
  83 #include <sys/errno.h>
  84 #include <sys/devicestat.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_bp          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         dev_t           dev;
 152
 153         int             sc_picker;      /* current picker */
 154
 155         /*
 156          * The following information is obtained from the
 157          * element address assignment page.
 158          */
 159         int             sc_firsts[4];   /* firsts, indexed by CHET_* */
 160         int             sc_counts[4];   /* counts, indexed by CHET_* */
 161
 162         /*
 163          * The following mask defines the legal combinations
 164          * of elements for the MOVE MEDIUM command.
 165          */
 166         u_int8_t        sc_movemask[4];
 167
 168         /*
 169          * As above, but for EXCHANGE MEDIUM.
 170          */
 171         u_int8_t        sc_exchangemask[4];
 172
 173         /*
 174          * Quirks; see below.  XXX KDM not implemented yet
 175          */
 176         int             sc_settledelay; /* delay for settle */
 177 };
 178
 179 #define CHUNIT(x)       (minor((x)))
 180 #define CH_CDEV_MAJOR   17
 181
 182 static  d_open_t        chopen;
 183 static  d_close_t       chclose;
 184 static  d_ioctl_t       chioctl;
 185 static  periph_init_t   chinit;
 186 static  periph_ctor_t   chregister;
 187 static  periph_oninv_t  choninvalidate;
 188 static  periph_dtor_t   chcleanup;
 189 static  periph_start_t  chstart;
 190 static  void            chasync(void *callback_arg, u_int32_t code,
 191                                 struct cam_path *path, void *arg);
 192 static  void            chdone(struct cam_periph *periph,
 193                                union ccb *done_ccb);
 194 static  int             cherror(union ccb *ccb, u_int32_t cam_flags,
 195                                 u_int32_t sense_flags);
 196 static  int             chmove(struct cam_periph *periph,
 197                                struct changer_move *cm);
 198 static  int             chexchange(struct cam_periph *periph,
 199                                    struct changer_exchange *ce);
 200 static  int             chposition(struct cam_periph *periph,
 201                                    struct changer_position *cp);
 202 static  int             chgetelemstatus(struct cam_periph *periph,
 203                                 struct changer_element_status_request *csr);
 204 static  int             chsetvoltag(struct cam_periph *periph,
 205                                     struct changer_set_voltag_request *csvr);
 206 static  int             chielem(struct cam_periph *periph,
 207                                 unsigned int timeout);
 208 static  int             chgetparams(struct cam_periph *periph);
 209
 210 static struct periph_driver chdriver =
 211 {
 212         chinit, "ch",
 213         TAILQ_HEAD_INITIALIZER(chdriver.units), /* generation */ 0
 214 };
 215
 216 DATA_SET(periphdriver_set, chdriver);
 217
 218 static struct cdevsw ch_cdevsw = {
 219         /* name */      "ch",
 220         /* maj */       CH_CDEV_MAJOR,
 221         /* flags */     0,
 222         /* port */      NULL,
 223         /* autoq */     0,
 224
 225         /* open */      chopen,
 226         /* close */     chclose,
 227         /* read */      noread,
 228         /* write */     nowrite,
 229         /* ioctl */     chioctl,
 230         /* poll */      nopoll,
 231         /* mmap */      nommap,
 232         /* strategy */  nostrategy,
 233         /* dump */      nodump,
 234         /* psize */     nopsize
 235 };
 236
 237 static struct extend_array *chperiphs;
 238
 239 void
 240 chinit(void)
 241 {
 242         cam_status status;
 243         struct cam_path *path;
 244
 245         /*
 246          * Create our extend array for storing the devices we attach to.
 247          */
 248         chperiphs = cam_extend_new();
 249         if (chperiphs == NULL) {
 250                 printf("ch: Failed to alloc extend array!\n");
 251                 return;
 252         }
 253
 254         /*
 255          * Install a global async callback.  This callback will
 256          * receive async callbacks like "new device found".
 257          */
 258         status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
 259                                  CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
 260
 261         if (status == CAM_REQ_CMP) {
 262                 struct ccb_setasync csa;
 263
 264                 xpt_setup_ccb(&csa.ccb_h, path, /*priority*/5);
 265                 csa.ccb_h.func_code = XPT_SASYNC_CB;
 266                 csa.event_enable = AC_FOUND_DEVICE;
 267                 csa.callback = chasync;
 268                 csa.callback_arg = NULL;
 269                 xpt_action((union ccb *)&csa);
 270                 status = csa.ccb_h.status;
 271                 xpt_free_path(path);
 272         }
 273
 274         if (status != CAM_REQ_CMP) {
 275                 printf("ch: Failed to attach master async callback "
 276                        "due to status 0x%x!\n", status);
 277         }
 278 }
 279
 280 static void
 281 choninvalidate(struct cam_periph *periph)
 282 {
 283         struct ch_softc *softc;
 284         struct ccb_setasync csa;
 285
 286         softc = (struct ch_softc *)periph->softc;
 287
 288         /*
 289          * De-register any async callbacks.
 290          */
 291         xpt_setup_ccb(&csa.ccb_h, periph->path,
 292                       /* priority */ 5);
 293         csa.ccb_h.func_code = XPT_SASYNC_CB;
 294         csa.event_enable = 0;
 295         csa.callback = chasync;
 296         csa.callback_arg = periph;
 297         xpt_action((union ccb *)&csa);
 298
 299         softc->flags |= CH_FLAG_INVALID;
 300
 301         xpt_print_path(periph->path);
 302         printf("lost device\n");
 303
 304 }
 305
 306 static void
 307 chcleanup(struct cam_periph *periph)
 308 {
 309         struct ch_softc *softc;
 310
 311         softc = (struct ch_softc *)periph->softc;
 312
 313         devstat_remove_entry(&softc->device_stats);
 314         destroy_dev(softc->dev);
 315         cam_extend_release(chperiphs, periph->unit_number);
 316         xpt_print_path(periph->path);
 317         printf("removing device entry\n");
 318         free(softc, M_DEVBUF);
 319 }
 320
 321 static void
 322 chasync(void *callback_arg, u_int32_t code, struct cam_path *path, void *arg)
 323 {
 324         struct cam_periph *periph;
 325
 326         periph = (struct cam_periph *)callback_arg;
 327
 328         switch(code) {
 329         case AC_FOUND_DEVICE:
 330         {
 331                 struct ccb_getdev *cgd;
 332                 cam_status status;
 333
 334                 cgd = (struct ccb_getdev *)arg;
 335
 336                 if (SID_TYPE(&cgd->inq_data)!= T_CHANGER)
 337                         break;
 338
 339                 /*
 340                  * Allocate a peripheral instance for
 341                  * this device and start the probe
 342                  * process.
 343                  */
 344                 status = cam_periph_alloc(chregister, choninvalidate,
 345                                           chcleanup, chstart, "ch",
 346                                           CAM_PERIPH_BIO, cgd->ccb_h.path,
 347                                           chasync, AC_FOUND_DEVICE, cgd);
 348
 349                 if (status != CAM_REQ_CMP
 350                  && status != CAM_REQ_INPROG)
 351                         printf("chasync: Unable to probe new device "
 352                                "due to status 0x%x\n", status);
 353
 354                 break;
 355
 356         }
 357         default:
 358                 cam_periph_async(periph, code, path, arg);
 359                 break;
 360         }
 361 }
 362
 363 static cam_status
 364 chregister(struct cam_periph *periph, void *arg)
 365 {
 366         struct ch_softc *softc;
 367         struct ccb_setasync csa;
 368         struct ccb_getdev *cgd;
 369
 370         cgd = (struct ccb_getdev *)arg;
 371         if (periph == NULL) {
 372                 printf("chregister: periph was NULL!!\n");
 373                 return(CAM_REQ_CMP_ERR);
 374         }
 375
 376         if (cgd == NULL) {
 377                 printf("chregister: no getdev CCB, can't register device\n");
 378                 return(CAM_REQ_CMP_ERR);
 379         }
 380
 381         softc = (struct ch_softc *)malloc(sizeof(*softc),M_DEVBUF,M_NOWAIT);
 382
 383         if (softc == NULL) {
 384                 printf("chregister: Unable to probe new device. "
 385                        "Unable to allocate softc\n");
 386                 return(CAM_REQ_CMP_ERR);
 387         }
 388
 389         bzero(softc, sizeof(*softc));
 390         softc->state = CH_STATE_PROBE;
 391         periph->softc = softc;
 392         cam_extend_set(chperiphs, periph->unit_number, periph);
 393         softc->quirks = CH_Q_NONE;
 394
 395         /*
 396          * Changers don't have a blocksize, and obviously don't support
 397          * tagged queueing.
 398          */
 399         devstat_add_entry(&softc->device_stats, "ch",
 400                           periph->unit_number, 0,
 401                           DEVSTAT_NO_BLOCKSIZE | DEVSTAT_NO_ORDERED_TAGS,
 402                           SID_TYPE(&cgd->inq_data)| DEVSTAT_TYPE_IF_SCSI,
 403                           DEVSTAT_PRIORITY_OTHER);
 404
 405         /* Register the device */
 406         softc->dev = make_dev(&ch_cdevsw, periph->unit_number, UID_ROOT,
 407                               GID_OPERATOR, 0600, "%s%d", periph->periph_name,
 408                               periph->unit_number);
 409
 410         /*
 411          * Add an async callback so that we get
 412          * notified if this device goes away.
 413          */
 414         xpt_setup_ccb(&csa.ccb_h, periph->path, /* priority */ 5);
 415         csa.ccb_h.func_code = XPT_SASYNC_CB;
 416         csa.event_enable = AC_LOST_DEVICE;
 417         csa.callback = chasync;
 418         csa.callback_arg = periph;
 419         xpt_action((union ccb *)&csa);
 420
 421         /*
 422          * Lock this peripheral until we are setup.
 423          * This first call can't block
 424          */
 425         (void)cam_periph_lock(periph, 0);
 426         xpt_schedule(periph, /*priority*/5);
 427
 428         return(CAM_REQ_CMP);
 429 }
 430
 431 static int
 432 chopen(dev_t dev, int flags, int fmt, struct thread *td)
 433 {
 434         struct cam_periph *periph;
 435         struct ch_softc *softc;
 436         int unit, error;
 437         int s;
 438
 439         unit = CHUNIT(dev);
 440         periph = cam_extend_get(chperiphs, unit);
 441
 442         if (periph == NULL)
 443                 return(ENXIO);
 444
 445         softc = (struct ch_softc *)periph->softc;
 446
 447         s = splsoftcam();
 448         if (softc->flags & CH_FLAG_INVALID) {
 449                 splx(s);
 450                 return(ENXIO);
 451         }
 452
 453         if ((error = cam_periph_lock(periph, PCATCH)) != 0) {
 454                 splx(s);
 455                 return (error);
 456         }
 457
 458         splx(s);
 459
 460         if ((softc->flags & CH_FLAG_OPEN) == 0) {
 461                 if (cam_periph_acquire(periph) != CAM_REQ_CMP)
 462                         return(ENXIO);
 463                 softc->flags |= CH_FLAG_OPEN;
 464         }
 465
 466         /*
 467          * Load information about this changer device into the softc.
 468          */
 469         if ((error = chgetparams(periph)) != 0) {
 470                 softc->flags &= ~CH_FLAG_OPEN;
 471                 cam_periph_unlock(periph);
 472                 cam_periph_release(periph);
 473                 return(error);
 474         }
 475
 476         cam_periph_unlock(periph);
 477
 478         return(error);
 479 }
 480
 481 static int
 482 chclose(dev_t dev, int flag, int fmt, struct thread *td)
 483 {
 484         struct  cam_periph *periph;
 485         struct  ch_softc *softc;
 486         int     unit, error;
 487
 488         error = 0;
 489
 490         unit = CHUNIT(dev);
 491         periph = cam_extend_get(chperiphs, unit);
 492         if (periph == NULL)
 493                 return(ENXIO);
 494
 495         softc = (struct ch_softc *)periph->softc;
 496
 497         if ((error = cam_periph_lock(periph, 0)) != 0)
 498                 return(error);
 499
 500         softc->flags &= ~CH_FLAG_OPEN;
 501
 502         cam_periph_unlock(periph);
 503         cam_periph_release(periph);
 504
 505         return(0);
 506 }
 507
 508 static void
 509 chstart(struct cam_periph *periph, union ccb *start_ccb)
 510 {
 511         struct ch_softc *softc;
 512         int s;
 513
 514         softc = (struct ch_softc *)periph->softc;
 515
 516         switch (softc->state) {
 517         case CH_STATE_NORMAL:
 518         {
 519                 s = splbio();
 520                 if (periph->immediate_priority <= periph->pinfo.priority){
 521                         start_ccb->ccb_h.ccb_state = CH_CCB_WAITING;
 522
 523                         SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
 524                                           periph_links.sle);
 525                         periph->immediate_priority = CAM_PRIORITY_NONE;
 526                         splx(s);
 527                         wakeup(&periph->ccb_list);
 528                 } else
 529                         splx(s);
 530                 break;
 531         }
 532         case CH_STATE_PROBE:
 533         {
 534                 int mode_buffer_len;
 535                 void *mode_buffer;
 536
 537                 /*
 538                  * Include the block descriptor when calculating the mode
 539                  * buffer length,
 540                  */
 541                 mode_buffer_len = sizeof(struct scsi_mode_header_6) +
 542                                   sizeof(struct scsi_mode_blk_desc) +
 543                                  sizeof(struct page_element_address_assignment);
 544
 545                 mode_buffer = malloc(mode_buffer_len, M_TEMP, M_NOWAIT);
 546
 547                 if (mode_buffer == NULL) {
 548                         printf("chstart: couldn't malloc mode sense data\n");
 549                         break;
 550                 }
 551                 bzero(mode_buffer, mode_buffer_len);
 552
 553                 /*
 554                  * Get the element address assignment page.
 555                  */
 556                 scsi_mode_sense(&start_ccb->csio,
 557                                 /* retries */ 1,
 558                                 /* cbfcnp */ chdone,
 559                                 /* tag_action */ MSG_SIMPLE_Q_TAG,
 560                                 /* dbd */ (softc->quirks & CH_Q_NO_DBD) ?
 561                                         FALSE : TRUE,
 562                                 /* page_code */ SMS_PAGE_CTRL_CURRENT,
 563                                 /* page */ CH_ELEMENT_ADDR_ASSIGN_PAGE,
 564                                 /* param_buf */ (u_int8_t *)mode_buffer,
 565                                 /* param_len */ mode_buffer_len,
 566                                 /* sense_len */ SSD_FULL_SIZE,
 567                                 /* timeout */ CH_TIMEOUT_MODE_SENSE);
 568
 569                 start_ccb->ccb_h.ccb_bp = NULL;
 570                 start_ccb->ccb_h.ccb_state = CH_CCB_PROBE;
 571                 xpt_action(start_ccb);
 572                 break;
 573         }
 574         }
 575 }
 576
 577 static void
 578 chdone(struct cam_periph *periph, union ccb *done_ccb)
 579 {
 580         struct ch_softc *softc;
 581         struct ccb_scsiio *csio;
 582
 583         softc = (struct ch_softc *)periph->softc;
 584         csio = &done_ccb->csio;
 585
 586         switch(done_ccb->ccb_h.ccb_state) {
 587         case CH_CCB_PROBE:
 588         {
 589                 struct scsi_mode_header_6 *mode_header;
 590                 struct page_element_address_assignment *ea;
 591                 char announce_buf[80];
 592
 593
 594                 mode_header = (struct scsi_mode_header_6 *)csio->data_ptr;
 595
 596                 ea = (struct page_element_address_assignment *)
 597                         find_mode_page_6(mode_header);
 598
 599                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP){
 600
 601                         softc->sc_firsts[CHET_MT] = scsi_2btoul(ea->mtea);
 602                         softc->sc_counts[CHET_MT] = scsi_2btoul(ea->nmte);
 603                         softc->sc_firsts[CHET_ST] = scsi_2btoul(ea->fsea);
 604                         softc->sc_counts[CHET_ST] = scsi_2btoul(ea->nse);
 605                         softc->sc_firsts[CHET_IE] = scsi_2btoul(ea->fieea);
 606                         softc->sc_counts[CHET_IE] = scsi_2btoul(ea->niee);
 607                         softc->sc_firsts[CHET_DT] = scsi_2btoul(ea->fdtea);
 608                         softc->sc_counts[CHET_DT] = scsi_2btoul(ea->ndte);
 609                         softc->sc_picker = softc->sc_firsts[CHET_MT];
 610
 611 #define PLURAL(c)       (c) == 1 ? "" : "s"
 612                         snprintf(announce_buf, sizeof(announce_buf),
 613                                 "%d slot%s, %d drive%s, "
 614                                 "%d picker%s, %d portal%s",
 615                                 softc->sc_counts[CHET_ST],
 616                                 PLURAL(softc->sc_counts[CHET_ST]),
 617                                 softc->sc_counts[CHET_DT],
 618                                 PLURAL(softc->sc_counts[CHET_DT]),
 619                                 softc->sc_counts[CHET_MT],
 620                                 PLURAL(softc->sc_counts[CHET_MT]),
 621                                 softc->sc_counts[CHET_IE],
 622                                 PLURAL(softc->sc_counts[CHET_IE]));
 623 #undef PLURAL
 624                 } else {
 625                         int error;
 626
 627                         error = cherror(done_ccb, 0, SF_RETRY_UA |
 628                                         SF_NO_PRINT | SF_RETRY_SELTO);
 629                         /*
 630                          * Retry any UNIT ATTENTION type errors.  They
 631                          * are expected at boot.
 632                          */
 633                         if (error == ERESTART) {
 634                                 /*
 635                                  * A retry was scheuled, so
 636                                  * just return.
 637                                  */
 638                                 return;
 639                         } else if (error != 0) {
 640                                 int retry_scheduled;
 641                                 struct scsi_mode_sense_6 *sms;
 642
 643                                 sms = (struct scsi_mode_sense_6 *)
 644                                         done_ccb->csio.cdb_io.cdb_bytes;
 645
 646                                 /*
 647                                  * Check to see if block descriptors were
 648                                  * disabled.  Some devices don't like that.
 649                                  * We're taking advantage of the fact that
 650                                  * the first few bytes of the 6 and 10 byte
 651                                  * mode sense commands are the same.  If
 652                                  * block descriptors were disabled, enable
 653                                  * them and re-send the command.
 654                                  */
 655                                 if (sms->byte2 & SMS_DBD) {
 656                                         sms->byte2 &= ~SMS_DBD;
 657                                         xpt_action(done_ccb);
 658                                         softc->quirks |= CH_Q_NO_DBD;
 659                                         retry_scheduled = 1;
 660                                 } else
 661                                         retry_scheduled = 0;
 662
 663                                 /* Don't wedge this device's queue */
 664                                 cam_release_devq(done_ccb->ccb_h.path,
 665                                                  /*relsim_flags*/0,
 666                                                  /*reduction*/0,
 667                                                  /*timeout*/0,
 668                                                  /*getcount_only*/0);
 669
 670                                 if (retry_scheduled)
 671                                         return;
 672
 673                                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK)
 674                                     == CAM_SCSI_STATUS_ERROR)
 675                                         scsi_sense_print(&done_ccb->csio);
 676                                 else {
 677                                         xpt_print_path(periph->path);
 678                                         printf("got CAM status %#x\n",
 679                                                done_ccb->ccb_h.status);
 680                                 }
 681                                 xpt_print_path(periph->path);
 682                                 printf("fatal error, failed to attach to"
 683                                        " device\n");
 684
 685                                 cam_periph_invalidate(periph);
 686
 687                                 announce_buf[0] = '\0';
 688                         }
 689                 }
 690                 if (announce_buf[0] != '\0')
 691                         xpt_announce_periph(periph, announce_buf);
 692                 softc->state = CH_STATE_NORMAL;
 693                 free(mode_header, M_TEMP);
 694                 /*
 695                  * Since our peripheral may be invalidated by an error
 696                  * above or an external event, we must release our CCB
 697                  * before releasing the probe lock on the peripheral.
 698                  * The peripheral will only go away once the last lock
 699                  * is removed, and we need it around for the CCB release
 700                  * operation.
 701                  */
 702                 xpt_release_ccb(done_ccb);
 703                 cam_periph_unlock(periph);
 704                 return;
 705         }
 706         case CH_CCB_WAITING:
 707         {
 708                 /* Caller will release the CCB */
 709                 wakeup(&done_ccb->ccb_h.cbfcnp);
 710                 return;
 711         }
 712         default:
 713                 break;
 714         }
 715         xpt_release_ccb(done_ccb);
 716 }
 717
 718 static int
 719 cherror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
 720 {
 721         struct ch_softc *softc;
 722         struct cam_periph *periph;
 723
 724         periph = xpt_path_periph(ccb->ccb_h.path);
 725         softc = (struct ch_softc *)periph->softc;
 726
 727         return (cam_periph_error(ccb, cam_flags, sense_flags,
 728                                  &softc->saved_ccb));
 729 }
 730
 731 static int
 732 chioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 733 {
 734         struct cam_periph *periph;
 735         struct ch_softc *softc;
 736         u_int8_t unit;
 737         int error;
 738
 739         unit = CHUNIT(dev);
 740
 741         periph = cam_extend_get(chperiphs, unit);
 742         if (periph == NULL)
 743                 return(ENXIO);
 744
 745         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering chioctl\n"));
 746
 747         softc = (struct ch_softc *)periph->softc;
 748
 749         error = 0;
 750
 751         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
 752                   ("trying to do ioctl %#lx\n", cmd));
 753
 754         /*
 755          * If this command can change the device's state, we must
 756          * have the device open for writing.
 757          */
 758         switch (cmd) {
 759         case CHIOGPICKER:
 760         case CHIOGPARAMS:
 761         case CHIOGSTATUS:
 762                 break;
 763
 764         default:
 765                 if ((flag & FWRITE) == 0)
 766                         return (EBADF);
 767         }
 768
 769         switch (cmd) {
 770         case CHIOMOVE:
 771                 error = chmove(periph, (struct changer_move *)addr);
 772                 break;
 773
 774         case CHIOEXCHANGE:
 775                 error = chexchange(periph, (struct changer_exchange *)addr);
 776                 break;
 777
 778         case CHIOPOSITION:
 779                 error = chposition(periph, (struct changer_position *)addr);
 780                 break;
 781
 782         case CHIOGPICKER:
 783                 *(int *)addr = softc->sc_picker - softc->sc_firsts[CHET_MT];
 784                 break;
 785
 786         case CHIOSPICKER:
 787         {
 788                 int new_picker = *(int *)addr;
 789
 790                 if (new_picker > (softc->sc_counts[CHET_MT] - 1))
 791                         return (EINVAL);
 792                 softc->sc_picker = softc->sc_firsts[CHET_MT] + new_picker;
 793                 break;
 794         }
 795         case CHIOGPARAMS:
 796         {
 797                 struct changer_params *cp = (struct changer_params *)addr;
 798
 799                 cp->cp_npickers = softc->sc_counts[CHET_MT];
 800                 cp->cp_nslots = softc->sc_counts[CHET_ST];
 801                 cp->cp_nportals = softc->sc_counts[CHET_IE];
 802                 cp->cp_ndrives = softc->sc_counts[CHET_DT];
 803                 break;
 804         }
 805         case CHIOIELEM:
 806                 error = chielem(periph, *(unsigned int *)addr);
 807                 break;
 808
 809         case CHIOGSTATUS:
 810         {
 811                 error = chgetelemstatus(periph,
 812                                (struct changer_element_status_request *) addr);
 813                 break;
 814         }
 815
 816         case CHIOSETVOLTAG:
 817         {
 818                 error = chsetvoltag(periph,
 819                                     (struct changer_set_voltag_request *) addr);
 820                 break;
 821         }
 822
 823         /* Implement prevent/allow? */
 824
 825         default:
 826                 error = cam_periph_ioctl(periph, cmd, addr, cherror);
 827                 break;
 828         }
 829
 830         return (error);
 831 }
 832
 833 static int
 834 chmove(struct cam_periph *periph, struct changer_move *cm)
 835 {
 836         struct ch_softc *softc;
 837         u_int16_t fromelem, toelem;
 838         union ccb *ccb;
 839         int error;
 840
 841         error = 0;
 842         softc = (struct ch_softc *)periph->softc;
 843
 844         /*
 845          * Check arguments.
 846          */
 847         if ((cm->cm_fromtype > CHET_DT) || (cm->cm_totype > CHET_DT))
 848                 return (EINVAL);
 849         if ((cm->cm_fromunit > (softc->sc_counts[cm->cm_fromtype] - 1)) ||
 850             (cm->cm_tounit > (softc->sc_counts[cm->cm_totype] - 1)))
 851                 return (ENODEV);
 852
 853         /*
 854          * Check the request against the changer's capabilities.
 855          */
 856         if ((softc->sc_movemask[cm->cm_fromtype] & (1 << cm->cm_totype)) == 0)
 857                 return (ENODEV);
 858
 859         /*
 860          * Calculate the source and destination elements.
 861          */
 862         fromelem = softc->sc_firsts[cm->cm_fromtype] + cm->cm_fromunit;
 863         toelem = softc->sc_firsts[cm->cm_totype] + cm->cm_tounit;
 864
 865         ccb = cam_periph_getccb(periph, /*priority*/ 1);
 866
 867         scsi_move_medium(&ccb->csio,
 868                          /* retries */ 1,
 869                          /* cbfcnp */ chdone,
 870                          /* tag_action */ MSG_SIMPLE_Q_TAG,
 871                          /* tea */ softc->sc_picker,
 872                          /* src */ fromelem,
 873                          /* dst */ toelem,
 874                          /* invert */ (cm->cm_flags & CM_INVERT) ? TRUE : FALSE,
 875                          /* sense_len */ SSD_FULL_SIZE,
 876                          /* timeout */ CH_TIMEOUT_MOVE_MEDIUM);
 877
 878         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/0,
 879                                   /*sense_flags*/ SF_RETRY_UA | SF_RETRY_SELTO,
 880                                   &softc->device_stats);
 881
 882         xpt_release_ccb(ccb);
 883
 884         return(error);
 885 }
 886
 887 static int
 888 chexchange(struct cam_periph *periph, struct changer_exchange *ce)
 889 {
 890         struct ch_softc *softc;
 891         u_int16_t src, dst1, dst2;
 892         union ccb *ccb;
 893         int error;
 894
 895         error = 0;
 896         softc = (struct ch_softc *)periph->softc;
 897         /*
 898          * Check arguments.
 899          */
 900         if ((ce->ce_srctype > CHET_DT) || (ce->ce_fdsttype > CHET_DT) ||
 901             (ce->ce_sdsttype > CHET_DT))
 902                 return (EINVAL);
 903         if ((ce->ce_srcunit > (softc->sc_counts[ce->ce_srctype] - 1)) ||
 904             (ce->ce_fdstunit > (softc->sc_counts[ce->ce_fdsttype] - 1)) ||
 905             (ce->ce_sdstunit > (softc->sc_counts[ce->ce_sdsttype] - 1)))
 906                 return (ENODEV);
 907
 908         /*
 909          * Check the request against the changer's capabilities.
 910          */
 911         if (((softc->sc_exchangemask[ce->ce_srctype] &
 912              (1 << ce->ce_fdsttype)) == 0) ||
 913             ((softc->sc_exchangemask[ce->ce_fdsttype] &
 914              (1 << ce->ce_sdsttype)) == 0))
 915                 return (ENODEV);
 916
 917         /*
 918          * Calculate the source and destination elements.
 919          */
 920         src = softc->sc_firsts[ce->ce_srctype] + ce->ce_srcunit;
 921         dst1 = softc->sc_firsts[ce->ce_fdsttype] + ce->ce_fdstunit;
 922         dst2 = softc->sc_firsts[ce->ce_sdsttype] + ce->ce_sdstunit;
 923
 924         ccb = cam_periph_getccb(periph, /*priority*/ 1);
 925
 926         scsi_exchange_medium(&ccb->csio,
 927                              /* retries */ 1,
 928                              /* cbfcnp */ chdone,
 929                              /* tag_action */ MSG_SIMPLE_Q_TAG,
 930                              /* tea */ softc->sc_picker,
 931                              /* src */ src,
 932                              /* dst1 */ dst1,
 933                              /* dst2 */ dst2,
 934                              /* invert1 */ (ce->ce_flags & CE_INVERT1) ?
 935                                            TRUE : FALSE,
 936                              /* invert2 */ (ce->ce_flags & CE_INVERT2) ?
 937                                            TRUE : FALSE,
 938                              /* sense_len */ SSD_FULL_SIZE,
 939                              /* timeout */ CH_TIMEOUT_EXCHANGE_MEDIUM);
 940
 941         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/0,
 942                                   /*sense_flags*/ SF_RETRY_UA | SF_RETRY_SELTO,
 943                                   &softc->device_stats);
 944
 945         xpt_release_ccb(ccb);
 946
 947         return(error);
 948 }
 949
 950 static int
 951 chposition(struct cam_periph *periph, struct changer_position *cp)
 952 {
 953         struct ch_softc *softc;
 954         u_int16_t dst;
 955         union ccb *ccb;
 956         int error;
 957
 958         error = 0;
 959         softc = (struct ch_softc *)periph->softc;
 960
 961         /*
 962          * Check arguments.
 963          */
 964         if (cp->cp_type > CHET_DT)
 965                 return (EINVAL);
 966         if (cp->cp_unit > (softc->sc_counts[cp->cp_type] - 1))
 967                 return (ENODEV);
 968
 969         /*
 970          * Calculate the destination element.
 971          */
 972         dst = softc->sc_firsts[cp->cp_type] + cp->cp_unit;
 973
 974         ccb = cam_periph_getccb(periph, /*priority*/ 1);
 975
 976         scsi_position_to_element(&ccb->csio,
 977                                  /* retries */ 1,
 978                                  /* cbfcnp */ chdone,
 979                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
 980                                  /* tea */ softc->sc_picker,
 981                                  /* dst */ dst,
 982                                  /* invert */ (cp->cp_flags & CP_INVERT) ?
 983                                               TRUE : FALSE,
 984                                  /* sense_len */ SSD_FULL_SIZE,
 985                                  /* timeout */ CH_TIMEOUT_POSITION_TO_ELEMENT);
 986
 987         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ 0,
 988                                   /*sense_flags*/ SF_RETRY_UA | SF_RETRY_SELTO,
 989                                   &softc->device_stats);
 990
 991         xpt_release_ccb(ccb);
 992
 993         return(error);
 994 }
 995
 996 /*
 997  * Copy a volume tag to a volume_tag struct, converting SCSI byte order
 998  * to host native byte order in the volume serial number.  The volume
 999  * label as returned by the changer is transferred to user mode as
1000  * nul-terminated string.  Volume labels are truncated at the first
1001  * space, as suggested by SCSI-2.
1002  */
1003 static  void
1004 copy_voltag(struct changer_voltag *uvoltag, struct volume_tag *voltag)
1005 {
1006         int i;
1007         for (i=0; i<CH_VOLTAG_MAXLEN; i++) {
1008                 char c = voltag->vif[i];
1009                 if (c && c != ' ')
1010                         uvoltag->cv_volid[i] = c;
1011                 else
1012                         break;
1013         }
1014         uvoltag->cv_serial = scsi_2btoul(voltag->vsn);
1015 }
1016
1017 /*
1018  * Copy an an element status descriptor to a user-mode
1019  * changer_element_status structure.
1020  */
1021
1022 static  void
1023 copy_element_status(struct ch_softc *softc,
1024                     u_int16_t flags,
1025                     struct read_element_status_descriptor *desc,
1026                     struct changer_element_status *ces)
1027 {
1028         u_int16_t eaddr = scsi_2btoul(desc->eaddr);
1029         u_int16_t et;
1030
1031         ces->ces_int_addr = eaddr;
1032         /* set up logical address in element status */
1033         for (et = CHET_MT; et <= CHET_DT; et++) {
1034                 if ((softc->sc_firsts[et] <= eaddr)
1035                     && ((softc->sc_firsts[et] + softc->sc_counts[et])
1036                         > eaddr)) {
1037                         ces->ces_addr = eaddr - softc->sc_firsts[et];
1038                         ces->ces_type = et;
1039                         break;
1040                 }
1041         }
1042
1043         ces->ces_flags = desc->flags1;
1044
1045         ces->ces_sensecode = desc->sense_code;
1046         ces->ces_sensequal = desc->sense_qual;
1047
1048         if (desc->flags2 & READ_ELEMENT_STATUS_INVERT)
1049                 ces->ces_flags |= CES_INVERT;
1050
1051         if (desc->flags2 & READ_ELEMENT_STATUS_SVALID) {
1052
1053                 eaddr = scsi_2btoul(desc->ssea);
1054
1055                 /* convert source address to logical format */
1056                 for (et = CHET_MT; et <= CHET_DT; et++) {
1057                         if ((softc->sc_firsts[et] <= eaddr)
1058                             && ((softc->sc_firsts[et] + softc->sc_counts[et])
1059                                 > eaddr)) {
1060                                 ces->ces_source_addr =
1061                                         eaddr - softc->sc_firsts[et];
1062                                 ces->ces_source_type = et;
1063                                 ces->ces_flags |= CES_SOURCE_VALID;
1064                                 break;
1065                         }
1066                 }
1067
1068                 if (!(ces->ces_flags & CES_SOURCE_VALID))
1069                         printf("ch: warning: could not map element source "
1070                                "address %ud to a valid element type\n",
1071                                eaddr);
1072         }
1073
1074
1075         if (flags & READ_ELEMENT_STATUS_PVOLTAG)
1076                 copy_voltag(&(ces->ces_pvoltag), &(desc->pvoltag));
1077         if (flags & READ_ELEMENT_STATUS_AVOLTAG)
1078                 copy_voltag(&(ces->ces_avoltag), &(desc->avoltag));
1079
1080         if (desc->dt_scsi_flags & READ_ELEMENT_STATUS_DT_IDVALID) {
1081                 ces->ces_flags |= CES_SCSIID_VALID;
1082                 ces->ces_scsi_id = desc->dt_scsi_addr;
1083         }
1084
1085         if (desc->dt_scsi_addr & READ_ELEMENT_STATUS_DT_LUVALID) {
1086                 ces->ces_flags |= CES_LUN_VALID;
1087                 ces->ces_scsi_lun =
1088                         desc->dt_scsi_flags & READ_ELEMENT_STATUS_DT_LUNMASK;
1089         }
1090 }
1091
1092 static int
1093 chgetelemstatus(struct cam_periph *periph,
1094                 struct changer_element_status_request *cesr)
1095 {
1096         struct read_element_status_header *st_hdr;
1097         struct read_element_status_page_header *pg_hdr;
1098         struct read_element_status_descriptor *desc;
1099         caddr_t data = NULL;
1100         size_t size, desclen;
1101         int avail, i, error = 0;
1102         struct changer_element_status *user_data = NULL;
1103         struct ch_softc *softc;
1104         union ccb *ccb;
1105         int chet = cesr->cesr_element_type;
1106         int want_voltags = (cesr->cesr_flags & CESR_VOLTAGS) ? 1 : 0;
1107
1108         softc = (struct ch_softc *)periph->softc;
1109
1110         /* perform argument checking */
1111
1112         /*
1113          * Perform a range check on the cesr_element_{base,count}
1114          * request argument fields.
1115          */
1116         if ((softc->sc_counts[chet] - cesr->cesr_element_base) <= 0
1117             || (cesr->cesr_element_base + cesr->cesr_element_count)
1118                 > softc->sc_counts[chet])
1119                 return (EINVAL);
1120
1121         /*
1122          * Request one descriptor for the given element type.  This
1123          * is used to determine the size of the descriptor so that
1124          * we can allocate enough storage for all of them.  We assume
1125          * that the first one can fit into 1k.
1126          */
1127         data = (caddr_t)malloc(1024, M_DEVBUF, M_WAITOK);
1128
1129         ccb = cam_periph_getccb(periph, /*priority*/ 1);
1130
1131         scsi_read_element_status(&ccb->csio,
1132                                  /* retries */ 1,
1133                                  /* cbfcnp */ chdone,
1134                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
1135                                  /* voltag */ want_voltags,
1136                                  /* sea */ softc->sc_firsts[chet],
1137                                  /* count */ 1,
1138                                  /* data_ptr */ data,
1139                                  /* dxfer_len */ 1024,
1140                                  /* sense_len */ SSD_FULL_SIZE,
1141                                  /* timeout */ CH_TIMEOUT_READ_ELEMENT_STATUS);
1142
1143         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ 0,
1144                                   /*sense_flags*/ SF_RETRY_UA | SF_RETRY_SELTO,
1145                                   &softc->device_stats);
1146
1147         if (error)
1148                 goto done;
1149
1150         st_hdr = (struct read_element_status_header *)data;
1151         pg_hdr = (struct read_element_status_page_header *)((uintptr_t)st_hdr +
1152                   sizeof(struct read_element_status_header));
1153         desclen = scsi_2btoul(pg_hdr->edl);
1154
1155         size = sizeof(struct read_element_status_header) +
1156                sizeof(struct read_element_status_page_header) +
1157                (desclen * cesr->cesr_element_count);
1158
1159         /*
1160          * Reallocate storage for descriptors and get them from the
1161          * device.
1162          */
1163         free(data, M_DEVBUF);
1164         data = (caddr_t)malloc(size, M_DEVBUF, M_WAITOK);
1165
1166         scsi_read_element_status(&ccb->csio,
1167                                  /* retries */ 1,
1168                                  /* cbfcnp */ chdone,
1169                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
1170                                  /* voltag */ want_voltags,
1171                                  /* sea */ softc->sc_firsts[chet]
1172                                  + cesr->cesr_element_base,
1173                                  /* count */ cesr->cesr_element_count,
1174                                  /* data_ptr */ data,
1175                                  /* dxfer_len */ size,
1176                                  /* sense_len */ SSD_FULL_SIZE,
1177                                  /* timeout */ CH_TIMEOUT_READ_ELEMENT_STATUS);
1178
1179         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ 0,
1180                                   /*sense_flags*/ SF_RETRY_UA | SF_RETRY_SELTO,
1181                                   &softc->device_stats);
1182
1183         if (error)
1184                 goto done;
1185
1186         /*
1187          * Fill in the user status array.
1188          */
1189         st_hdr = (struct read_element_status_header *)data;
1190         avail = scsi_2btoul(st_hdr->count);
1191
1192         if (avail != cesr->cesr_element_count) {
1193                 xpt_print_path(periph->path);
1194                 printf("warning, READ ELEMENT STATUS avail != count\n");
1195         }
1196
1197         user_data = (struct changer_element_status *)
1198                 malloc(avail * sizeof(struct changer_element_status),
1199                        M_DEVBUF, M_WAITOK | M_ZERO);
1200
1201         desc = (struct read_element_status_descriptor *)((uintptr_t)data +
1202                 sizeof(struct read_element_status_header) +
1203                 sizeof(struct read_element_status_page_header));
1204         /*
1205          * Set up the individual element status structures
1206          */
1207         for (i = 0; i < avail; ++i) {
1208                 struct changer_element_status *ces = &(user_data[i]);
1209
1210                 copy_element_status(softc, pg_hdr->flags, desc, ces);
1211
1212                 desc = (struct read_element_status_descriptor *)
1213                        ((uintptr_t)desc + desclen);
1214         }
1215
1216         /* Copy element status structures out to userspace. */
1217         error = copyout(user_data,
1218                         cesr->cesr_element_status,
1219                         avail * sizeof(struct changer_element_status));
1220
1221  done:
1222         xpt_release_ccb(ccb);
1223
1224         if (data != NULL)
1225                 free(data, M_DEVBUF);
1226         if (user_data != NULL)
1227                 free(user_data, M_DEVBUF);
1228
1229         return (error);
1230 }
1231
1232 static int
1233 chielem(struct cam_periph *periph,
1234         unsigned int timeout)
1235 {
1236         union ccb *ccb;
1237         struct ch_softc *softc;
1238         int error;
1239
1240         if (!timeout) {
1241                 timeout = CH_TIMEOUT_INITIALIZE_ELEMENT_STATUS;
1242         } else {
1243                 timeout *= 1000;
1244         }
1245
1246         error = 0;
1247         softc = (struct ch_softc *)periph->softc;
1248
1249         ccb = cam_periph_getccb(periph, /*priority*/ 1);
1250
1251         scsi_initialize_element_status(&ccb->csio,
1252                                       /* retries */ 1,
1253                                       /* cbfcnp */ chdone,
1254                                       /* tag_action */ MSG_SIMPLE_Q_TAG,
1255                                       /* sense_len */ SSD_FULL_SIZE,
1256                                       /* timeout */ timeout);
1257
1258         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ 0,
1259                                   /*sense_flags*/ SF_RETRY_UA | SF_RETRY_SELTO,
1260                                   &softc->device_stats);
1261
1262         xpt_release_ccb(ccb);
1263
1264         return(error);
1265 }
1266
1267 static int
1268 chsetvoltag(struct cam_periph *periph,
1269             struct changer_set_voltag_request *csvr)
1270 {
1271         union ccb *ccb;
1272         struct ch_softc *softc;
1273         u_int16_t ea;
1274         u_int8_t sac;
1275         struct scsi_send_volume_tag_parameters ssvtp;
1276         int error;
1277         int i;
1278
1279         error = 0;
1280         softc = (struct ch_softc *)periph->softc;
1281
1282         bzero(&ssvtp, sizeof(ssvtp));
1283         for (i=0; i<sizeof(ssvtp.vitf); i++) {
1284                 ssvtp.vitf[i] = ' ';
1285         }
1286
1287         /*
1288          * Check arguments.
1289          */
1290         if (csvr->csvr_type > CHET_DT)
1291                 return EINVAL;
1292         if (csvr->csvr_addr > (softc->sc_counts[csvr->csvr_type] - 1))
1293                 return ENODEV;
1294
1295         ea = softc->sc_firsts[csvr->csvr_type] + csvr->csvr_addr;
1296
1297         if (csvr->csvr_flags & CSVR_ALTERNATE) {
1298                 switch (csvr->csvr_flags & CSVR_MODE_MASK) {
1299                 case CSVR_MODE_SET:
1300                         sac = SEND_VOLUME_TAG_ASSERT_ALTERNATE;
1301                         break;
1302                 case CSVR_MODE_REPLACE:
1303                         sac = SEND_VOLUME_TAG_REPLACE_ALTERNATE;
1304                         break;
1305                 case CSVR_MODE_CLEAR:
1306                         sac = SEND_VOLUME_TAG_UNDEFINED_ALTERNATE;
1307                         break;
1308                 default:
1309                         error = EINVAL;
1310                         goto out;
1311                 }
1312         } else {
1313                 switch (csvr->csvr_flags & CSVR_MODE_MASK) {
1314                 case CSVR_MODE_SET:
1315                         sac = SEND_VOLUME_TAG_ASSERT_PRIMARY;
1316                         break;
1317                 case CSVR_MODE_REPLACE:
1318                         sac = SEND_VOLUME_TAG_REPLACE_PRIMARY;
1319                         break;
1320                 case CSVR_MODE_CLEAR:
1321                         sac = SEND_VOLUME_TAG_UNDEFINED_PRIMARY;
1322                         break;
1323                 default:
1324                         error = EINVAL;
1325                         goto out;
1326                 }
1327         }
1328
1329         memcpy(ssvtp.vitf, csvr->csvr_voltag.cv_volid,
1330                min(strlen(csvr->csvr_voltag.cv_volid), sizeof(ssvtp.vitf)));
1331         scsi_ulto2b(csvr->csvr_voltag.cv_serial, ssvtp.minvsn);
1332
1333         ccb = cam_periph_getccb(periph, /*priority*/ 1);
1334
1335         scsi_send_volume_tag(&ccb->csio,
1336                              /* retries */ 1,
1337                              /* cbfcnp */ chdone,
1338                              /* tag_action */ MSG_SIMPLE_Q_TAG,
1339                              /* element_address */ ea,
1340                              /* send_action_code */ sac,
1341                              /* parameters */ &ssvtp,
1342                              /* sense_len */ SSD_FULL_SIZE,
1343                              /* timeout */ CH_TIMEOUT_SEND_VOLTAG);
1344
1345         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ 0,
1346                                   /*sense_flags*/ SF_RETRY_UA | SF_RETRY_SELTO,
1347                                   &softc->device_stats);
1348
1349         xpt_release_ccb(ccb);
1350
1351  out:
1352         return error;
1353 }
1354
1355 static int
1356 chgetparams(struct cam_periph *periph)
1357 {
1358         union ccb *ccb;
1359         struct ch_softc *softc;
1360         void *mode_buffer;
1361         int mode_buffer_len;
1362         struct page_element_address_assignment *ea;
1363         struct page_device_capabilities *cap;
1364         int error, from, dbd;
1365         u_int8_t *moves, *exchanges;
1366
1367         error = 0;
1368
1369         softc = (struct ch_softc *)periph->softc;
1370
1371         ccb = cam_periph_getccb(periph, /*priority*/ 1);
1372
1373         /*
1374          * The scsi_mode_sense_data structure is just a convenience
1375          * structure that allows us to easily calculate the worst-case
1376          * storage size of the mode sense buffer.
1377          */
1378         mode_buffer_len = sizeof(struct scsi_mode_sense_data);
1379
1380         mode_buffer = malloc(mode_buffer_len, M_TEMP, M_NOWAIT);
1381
1382         if (mode_buffer == NULL) {
1383                 printf("chgetparams: couldn't malloc mode sense data\n");
1384                 return(ENOSPC);
1385         }
1386
1387         bzero(mode_buffer, mode_buffer_len);
1388
1389         if (softc->quirks & CH_Q_NO_DBD)
1390                 dbd = FALSE;
1391         else
1392                 dbd = TRUE;
1393
1394         /*
1395          * Get the element address assignment page.
1396          */
1397         scsi_mode_sense(&ccb->csio,
1398                         /* retries */ 1,
1399                         /* cbfcnp */ chdone,
1400                         /* tag_action */ MSG_SIMPLE_Q_TAG,
1401                         /* dbd */ dbd,
1402                         /* page_code */ SMS_PAGE_CTRL_CURRENT,
1403                         /* page */ CH_ELEMENT_ADDR_ASSIGN_PAGE,
1404                         /* param_buf */ (u_int8_t *)mode_buffer,
1405                         /* param_len */ mode_buffer_len,
1406                         /* sense_len */ SSD_FULL_SIZE,
1407                         /* timeout */ CH_TIMEOUT_MODE_SENSE);
1408
1409         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ 0,
1410                                   /* sense_flags */ SF_RETRY_UA |
1411                                   SF_NO_PRINT | SF_RETRY_SELTO,
1412                                   &softc->device_stats);
1413
1414         if (error) {
1415                 if (dbd) {
1416                         struct scsi_mode_sense_6 *sms;
1417
1418                         sms = (struct scsi_mode_sense_6 *)
1419                                 ccb->csio.cdb_io.cdb_bytes;
1420
1421                         sms->byte2 &= ~SMS_DBD;
1422                         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ 0,
1423                                                   /*sense_flags*/ SF_RETRY_UA |
1424                                                   SF_RETRY_SELTO,
1425                                                   &softc->device_stats);
1426                 } else {
1427                         /*
1428                          * Since we disabled sense printing above, print
1429                          * out the sense here since we got an error.
1430                          */
1431                         scsi_sense_print(&ccb->csio);
1432                 }
1433
1434                 if (error) {
1435                         xpt_print_path(periph->path);
1436                         printf("chgetparams: error getting element "
1437                                "address page\n");
1438                         xpt_release_ccb(ccb);
1439                         free(mode_buffer, M_TEMP);
1440                         return(error);
1441                 }
1442         }
1443
1444         ea = (struct page_element_address_assignment *)
1445                 find_mode_page_6((struct scsi_mode_header_6 *)mode_buffer);
1446
1447         softc->sc_firsts[CHET_MT] = scsi_2btoul(ea->mtea);
1448         softc->sc_counts[CHET_MT] = scsi_2btoul(ea->nmte);
1449         softc->sc_firsts[CHET_ST] = scsi_2btoul(ea->fsea);
1450         softc->sc_counts[CHET_ST] = scsi_2btoul(ea->nse);
1451         softc->sc_firsts[CHET_IE] = scsi_2btoul(ea->fieea);
1452         softc->sc_counts[CHET_IE] = scsi_2btoul(ea->niee);
1453         softc->sc_firsts[CHET_DT] = scsi_2btoul(ea->fdtea);
1454         softc->sc_counts[CHET_DT] = scsi_2btoul(ea->ndte);
1455
1456         bzero(mode_buffer, mode_buffer_len);
1457
1458         /*
1459          * Now get the device capabilities page.
1460          */
1461         scsi_mode_sense(&ccb->csio,
1462                         /* retries */ 1,
1463                         /* cbfcnp */ chdone,
1464                         /* tag_action */ MSG_SIMPLE_Q_TAG,
1465                         /* dbd */ dbd,
1466                         /* page_code */ SMS_PAGE_CTRL_CURRENT,
1467                         /* page */ CH_DEVICE_CAP_PAGE,
1468                         /* param_buf */ (u_int8_t *)mode_buffer,
1469                         /* param_len */ mode_buffer_len,
1470                         /* sense_len */ SSD_FULL_SIZE,
1471                         /* timeout */ CH_TIMEOUT_MODE_SENSE);
1472
1473         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ 0,
1474                                   /* sense_flags */ SF_RETRY_UA | SF_NO_PRINT |
1475                                   SF_RETRY_SELTO, &softc->device_stats);
1476
1477         if (error) {
1478                 if (dbd) {
1479                         struct scsi_mode_sense_6 *sms;
1480
1481                         sms = (struct scsi_mode_sense_6 *)
1482                                 ccb->csio.cdb_io.cdb_bytes;
1483
1484                         sms->byte2 &= ~SMS_DBD;
1485                         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ 0,
1486                                                   /*sense_flags*/ SF_RETRY_UA |
1487                                                   SF_RETRY_SELTO,
1488                                                   &softc->device_stats);
1489                 } else {
1490                         /*
1491                          * Since we disabled sense printing above, print
1492                          * out the sense here since we got an error.
1493                          */
1494                         scsi_sense_print(&ccb->csio);
1495                 }
1496
1497                 if (error) {
1498                         xpt_print_path(periph->path);
1499                         printf("chgetparams: error getting device "
1500                                "capabilities page\n");
1501                         xpt_release_ccb(ccb);
1502                         free(mode_buffer, M_TEMP);
1503                         return(error);
1504                 }
1505         }
1506
1507         xpt_release_ccb(ccb);
1508
1509         cap = (struct page_device_capabilities *)
1510                 find_mode_page_6((struct scsi_mode_header_6 *)mode_buffer);
1511
1512         bzero(softc->sc_movemask, sizeof(softc->sc_movemask));
1513         bzero(softc->sc_exchangemask, sizeof(softc->sc_exchangemask));
1514         moves = &cap->move_from_mt;
1515         exchanges = &cap->exchange_with_mt;
1516         for (from = CHET_MT; from <= CHET_DT; ++from) {
1517                 softc->sc_movemask[from] = moves[from];
1518                 softc->sc_exchangemask[from] = exchanges[from];
1519         }
1520
1521         free(mode_buffer, M_TEMP);
1522
1523         return(error);
1524 }
1525
1526 void
1527 scsi_move_medium(struct ccb_scsiio *csio, u_int32_t retries,
1528                  void (*cbfcnp)(struct cam_periph *, union ccb *),
1529                  u_int8_t tag_action, u_int32_t tea, u_int32_t src,
1530                  u_int32_t dst, int invert, u_int8_t sense_len,
1531                  u_int32_t timeout)
1532 {
1533         struct scsi_move_medium *scsi_cmd;
1534
1535         scsi_cmd = (struct scsi_move_medium *)&csio->cdb_io.cdb_bytes;
1536         bzero(scsi_cmd, sizeof(*scsi_cmd));
1537
1538         scsi_cmd->opcode = MOVE_MEDIUM;
1539
1540         scsi_ulto2b(tea, scsi_cmd->tea);
1541         scsi_ulto2b(src, scsi_cmd->src);
1542         scsi_ulto2b(dst, scsi_cmd->dst);
1543
1544         if (invert)
1545                 scsi_cmd->invert |= MOVE_MEDIUM_INVERT;
1546
1547         cam_fill_csio(csio,
1548                       retries,
1549                       cbfcnp,
1550                       /*flags*/ CAM_DIR_NONE,
1551                       tag_action,
1552                       /*data_ptr*/ NULL,
1553                       /*dxfer_len*/ 0,
1554                       sense_len,
1555                       sizeof(*scsi_cmd),
1556                       timeout);
1557 }
1558
1559 void
1560 scsi_exchange_medium(struct ccb_scsiio *csio, u_int32_t retries,
1561                      void (*cbfcnp)(struct cam_periph *, union ccb *),
1562                      u_int8_t tag_action, u_int32_t tea, u_int32_t src,
1563                      u_int32_t dst1, u_int32_t dst2, int invert1,
1564                      int invert2, u_int8_t sense_len, u_int32_t timeout)
1565 {
1566         struct scsi_exchange_medium *scsi_cmd;
1567
1568         scsi_cmd = (struct scsi_exchange_medium *)&csio->cdb_io.cdb_bytes;
1569         bzero(scsi_cmd, sizeof(*scsi_cmd));
1570
1571         scsi_cmd->opcode = EXCHANGE_MEDIUM;
1572
1573         scsi_ulto2b(tea, scsi_cmd->tea);
1574         scsi_ulto2b(src, scsi_cmd->src);
1575         scsi_ulto2b(dst1, scsi_cmd->fdst);
1576         scsi_ulto2b(dst2, scsi_cmd->sdst);
1577
1578         if (invert1)
1579                 scsi_cmd->invert |= EXCHANGE_MEDIUM_INV1;
1580
1581         if (invert2)
1582                 scsi_cmd->invert |= EXCHANGE_MEDIUM_INV2;
1583
1584         cam_fill_csio(csio,
1585                       retries,
1586                       cbfcnp,
1587                       /*flags*/ CAM_DIR_NONE,
1588                       tag_action,
1589                       /*data_ptr*/ NULL,
1590                       /*dxfer_len*/ 0,
1591                       sense_len,
1592                       sizeof(*scsi_cmd),
1593                       timeout);
1594 }
1595
1596 void
1597 scsi_position_to_element(struct ccb_scsiio *csio, u_int32_t retries,
1598                          void (*cbfcnp)(struct cam_periph *, union ccb *),
1599                          u_int8_t tag_action, u_int32_t tea, u_int32_t dst,
1600                          int invert, u_int8_t sense_len, u_int32_t timeout)
1601 {
1602         struct scsi_position_to_element *scsi_cmd;
1603
1604         scsi_cmd = (struct scsi_position_to_element *)&csio->cdb_io.cdb_bytes;
1605         bzero(scsi_cmd, sizeof(*scsi_cmd));
1606
1607         scsi_cmd->opcode = POSITION_TO_ELEMENT;
1608
1609         scsi_ulto2b(tea, scsi_cmd->tea);
1610         scsi_ulto2b(dst, scsi_cmd->dst);
1611
1612         if (invert)
1613                 scsi_cmd->invert |= POSITION_TO_ELEMENT_INVERT;
1614
1615         cam_fill_csio(csio,
1616                       retries,
1617                       cbfcnp,
1618                       /*flags*/ CAM_DIR_NONE,
1619                       tag_action,
1620                       /*data_ptr*/ NULL,
1621                       /*dxfer_len*/ 0,
1622                       sense_len,
1623                       sizeof(*scsi_cmd),
1624                       timeout);
1625 }
1626
1627 void
1628 scsi_read_element_status(struct ccb_scsiio *csio, u_int32_t retries,
1629                          void (*cbfcnp)(struct cam_periph *, union ccb *),
1630                          u_int8_t tag_action, int voltag, u_int32_t sea,
1631                          u_int32_t count, u_int8_t *data_ptr,
1632                          u_int32_t dxfer_len, u_int8_t sense_len,
1633                          u_int32_t timeout)
1634 {
1635         struct scsi_read_element_status *scsi_cmd;
1636
1637         scsi_cmd = (struct scsi_read_element_status *)&csio->cdb_io.cdb_bytes;
1638         bzero(scsi_cmd, sizeof(*scsi_cmd));
1639
1640         scsi_cmd->opcode = READ_ELEMENT_STATUS;
1641
1642         scsi_ulto2b(sea, scsi_cmd->sea);
1643         scsi_ulto2b(count, scsi_cmd->count);
1644         scsi_ulto3b(dxfer_len, scsi_cmd->len);
1645
1646         if (voltag)
1647                 scsi_cmd->byte2 |= READ_ELEMENT_STATUS_VOLTAG;
1648
1649         cam_fill_csio(csio,
1650                       retries,
1651                       cbfcnp,
1652                       /*flags*/ CAM_DIR_IN,
1653                       tag_action,
1654                       data_ptr,
1655                       dxfer_len,
1656                       sense_len,
1657                       sizeof(*scsi_cmd),
1658                       timeout);
1659 }
1660
1661 void
1662 scsi_initialize_element_status(struct ccb_scsiio *csio, u_int32_t retries,
1663                                void (*cbfcnp)(struct cam_periph *, union ccb *),
1664                                u_int8_t tag_action, u_int8_t sense_len,
1665                                u_int32_t timeout)
1666 {
1667         struct scsi_initialize_element_status *scsi_cmd;
1668
1669         scsi_cmd = (struct scsi_initialize_element_status *)
1670                     &csio->cdb_io.cdb_bytes;
1671         bzero(scsi_cmd, sizeof(*scsi_cmd));
1672
1673         scsi_cmd->opcode = INITIALIZE_ELEMENT_STATUS;
1674
1675         cam_fill_csio(csio,
1676                       retries,
1677                       cbfcnp,
1678                       /*flags*/ CAM_DIR_NONE,
1679                       tag_action,
1680                       /* data_ptr */ NULL,
1681                       /* dxfer_len */ 0,
1682                       sense_len,
1683                       sizeof(*scsi_cmd),
1684                       timeout);
1685 }
1686
1687 void
1688 scsi_send_volume_tag(struct ccb_scsiio *csio, u_int32_t retries,
1689                      void (*cbfcnp)(struct cam_periph *, union ccb *),
1690                      u_int8_t tag_action,
1691                      u_int16_t element_address,
1692                      u_int8_t send_action_code,
1693                      struct scsi_send_volume_tag_parameters *parameters,
1694                      u_int8_t sense_len, u_int32_t timeout)
1695 {
1696         struct scsi_send_volume_tag *scsi_cmd;
1697
1698         scsi_cmd = (struct scsi_send_volume_tag *) &csio->cdb_io.cdb_bytes;
1699         bzero(scsi_cmd, sizeof(*scsi_cmd));
1700
1701         scsi_cmd->opcode = SEND_VOLUME_TAG;
1702         scsi_ulto2b(element_address, scsi_cmd->ea);
1703         scsi_cmd->sac = send_action_code;
1704         scsi_ulto2b(sizeof(*parameters), scsi_cmd->pll);
1705
1706         cam_fill_csio(csio,
1707                       retries,
1708                       cbfcnp,
1709                       /*flags*/ CAM_DIR_OUT,
1710                       tag_action,
1711                       /* data_ptr */ (u_int8_t *) parameters,
1712                       sizeof(*parameters),
1713                       sense_len,
1714                       sizeof(*scsi_cmd),
1715                       timeout);
1716 }