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  */
  29 /*
  30  * Derived from the NetBSD SCSI changer driver.
  31  *
  32  *      $NetBSD: ch.c,v 1.32 1998/01/12 09:49:12 thorpej Exp $
  33  *
  34  */
  35 /*
  36  * Copyright (c) 1996, 1997 Jason R. Thorpe <thorpej@and.com>
  37  * All rights reserved.
  38  *
  39  * Partially based on an autochanger driver written by Stefan Grefen
  40  * and on an autochanger driver written by the Systems Programming Group
  41  * at the University of Utah Computer Science Department.
  42  *
  43  * Redistribution and use in source and binary forms, with or without
  44  * modification, are permitted provided that the following conditions
  45  * are met:
  46  * 1. Redistributions of source code must retain the above copyright
  47  *    notice, this list of conditions and the following disclaimer.
  48  * 2. Redistributions in binary form must reproduce the above copyright
  49  *    notice, this list of conditions and the following disclaimer in the
  50  *    documentation and/or other materials provided with the distribution.
  51  * 3. All advertising materials mentioning features or use of this software
  52  *    must display the following acknowledgements:
  53  *      This product includes software developed by Jason R. Thorpe
  54  *      for And Communications, http://www.and.com/
  55  * 4. The name of the author may not be used to endorse or promote products
  56  *    derived from this software without specific prior written permission.
  57  *
  58  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  59  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  60  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  61  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  62  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  63  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  64  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  65  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  66  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  67  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  68  * SUCH DAMAGE.
  69  */
  70
  71 #include <sys/param.h>
  72 #include <sys/queue.h>
  73 #include <sys/systm.h>
  74 #include <sys/kernel.h>
  75 #include <sys/types.h>
  76 #include <sys/malloc.h>
  77 #include <sys/fcntl.h>
  78 #include <sys/conf.h>
  79 #include <sys/buf.h>
  80 #include <sys/chio.h>
  81 #include <sys/errno.h>
  82 #include <sys/devicestat.h>
  83
  84 #include "../cam.h"
  85 #include "../cam_ccb.h"
  86 #include "../cam_extend.h"
  87 #include "../cam_periph.h"
  88 #include "../cam_xpt_periph.h"
  89 #include "../cam_queue.h"
  90 #include "../cam_debug.h"
  91
  92 #include "scsi_all.h"
  93 #include "scsi_message.h"
  94 #include "scsi_ch.h"
  95
  96 /*
  97  * Timeout definitions for various changer related commands.  They may
  98  * be too short for some devices (especially the timeout for INITIALIZE
  99  * ELEMENT STATUS).
 100  */
 101
 102 static const u_int32_t  CH_TIMEOUT_MODE_SENSE                = 6000;
 103 static const u_int32_t  CH_TIMEOUT_MOVE_MEDIUM               = 100000;
 104 static const u_int32_t  CH_TIMEOUT_EXCHANGE_MEDIUM           = 100000;
 105 static const u_int32_t  CH_TIMEOUT_POSITION_TO_ELEMENT       = 100000;
 106 static const u_int32_t  CH_TIMEOUT_READ_ELEMENT_STATUS       = 10000;
 107 static const u_int32_t  CH_TIMEOUT_SEND_VOLTAG               = 10000;
 108 static const u_int32_t  CH_TIMEOUT_INITIALIZE_ELEMENT_STATUS = 500000;
 109
 110 typedef enum {
 111         CH_FLAG_INVALID         = 0x001,
 112         CH_FLAG_OPEN            = 0x002
 113 } ch_flags;
 114
 115 typedef enum {
 116         CH_STATE_PROBE,
 117         CH_STATE_NORMAL
 118 } ch_state;
 119
 120 typedef enum {
 121         CH_CCB_POLLED,
 122         CH_CCB_PROBE,
 123         CH_CCB_WAITING
 124 } ch_ccb_types;
 125
 126 typedef enum {
 127         CH_Q_NONE       = 0x00,
 128         CH_Q_NO_DBD     = 0x01
 129 } ch_quirks;
 130
 131 #define ccb_state       ppriv_field0
 132 #define ccb_bio         ppriv_ptr1
 133
 134 struct scsi_mode_sense_data {
 135         struct scsi_mode_header_6 header;
 136         struct scsi_mode_blk_desc blk_desc;
 137         union {
 138                 struct page_element_address_assignment ea;
 139                 struct page_transport_geometry_parameters tg;
 140                 struct page_device_capabilities cap;
 141         } pages;
 142 };
 143
 144 struct ch_softc {
 145         ch_flags        flags;
 146         ch_state        state;
 147         ch_quirks       quirks;
 148         union ccb       saved_ccb;
 149         struct devstat  device_stats;
 150
 151         int             sc_picker;      /* current picker */
 152
 153         /*
 154          * The following information is obtained from the
 155          * element address assignment page.
 156          */
 157         int             sc_firsts[CHET_MAX + 1];        /* firsts */
 158         int             sc_counts[CHET_MAX + 1];        /* counts */
 159
 160         /*
 161          * The following mask defines the legal combinations
 162          * of elements for the MOVE MEDIUM command.
 163          */
 164         u_int8_t        sc_movemask[CHET_MAX + 1];
 165
 166         /*
 167          * As above, but for EXCHANGE MEDIUM.
 168          */
 169         u_int8_t        sc_exchangemask[CHET_MAX + 1];
 170
 171         /*
 172          * Quirks; see below.  XXX KDM not implemented yet
 173          */
 174         int             sc_settledelay; /* delay for settle */
 175 };
 176
 177 #define CHUNIT(x)       (minor((x)))
 178
 179 static  d_open_t        chopen;
 180 static  d_close_t       chclose;
 181 static  d_ioctl_t       chioctl;
 182 static  periph_init_t   chinit;
 183 static  periph_ctor_t   chregister;
 184 static  periph_oninv_t  choninvalidate;
 185 static  periph_dtor_t   chcleanup;
 186 static  periph_start_t  chstart;
 187 static  void            chasync(void *callback_arg, u_int32_t code,
 188                                 struct cam_path *path, void *arg);
 189 static  void            chdone(struct cam_periph *periph,
 190                                union ccb *done_ccb);
 191 static  int             cherror(union ccb *ccb, u_int32_t cam_flags,
 192                                 u_int32_t sense_flags);
 193 static  int             chmove(struct cam_periph *periph,
 194                                struct changer_move *cm);
 195 static  int             chexchange(struct cam_periph *periph,
 196                                    struct changer_exchange *ce);
 197 static  int             chposition(struct cam_periph *periph,
 198                                    struct changer_position *cp);
 199 static  int             chgetelemstatus(struct cam_periph *periph,
 200                                 struct changer_element_status_request *csr);
 201 static  int             chsetvoltag(struct cam_periph *periph,
 202                                     struct changer_set_voltag_request *csvr);
 203 static  int             chielem(struct cam_periph *periph,
 204                                 unsigned int timeout);
 205 static  int             chgetparams(struct cam_periph *periph);
 206
 207 static struct periph_driver chdriver =
 208 {
 209         chinit, "ch",
 210         TAILQ_HEAD_INITIALIZER(chdriver.units), /* generation */ 0
 211 };
 212
 213 PERIPHDRIVER_DECLARE(ch, chdriver);
 214
 215 static struct dev_ops ch_ops = {
 216         { "ch", 0, 0 },
 217         .d_open = chopen,
 218         .d_close = chclose,
 219         .d_ioctl = chioctl
 220 };
 221
 222 static struct extend_array *chperiphs;
 223
 224 MALLOC_DEFINE(M_SCSICH, "scsi_ch", "scsi_ch buffers");
 225
 226 static void
 227 chinit(void)
 228 {
 229         cam_status status;
 230
 231         /*
 232          * Create our extend array for storing the devices we attach to.
 233          */
 234         chperiphs = cam_extend_new();
 235         if (chperiphs == NULL) {
 236                 kprintf("ch: Failed to alloc extend array!\n");
 237                 return;
 238         }
 239
 240         /*
 241          * Install a global async callback.  This callback will
 242          * receive async callbacks like "new device found".
 243          */
 244         status = xpt_register_async(AC_FOUND_DEVICE, chasync, NULL, NULL);
 245
 246         if (status != CAM_REQ_CMP) {
 247                 kprintf("ch: Failed to attach master async callback "
 248                        "due to status 0x%x!\n", status);
 249         }
 250 }
 251
 252 static void
 253 choninvalidate(struct cam_periph *periph)
 254 {
 255         struct ch_softc *softc;
 256
 257         softc = (struct ch_softc *)periph->softc;
 258
 259         /*
 260          * De-register any async callbacks.
 261          */
 262         xpt_register_async(0, chasync, periph, periph->path);
 263
 264         softc->flags |= CH_FLAG_INVALID;
 265
 266         xpt_print(periph->path, "lost device\n");
 267
 268 }
 269
 270 static void
 271 chcleanup(struct cam_periph *periph)
 272 {
 273         struct ch_softc *softc;
 274
 275         softc = (struct ch_softc *)periph->softc;
 276
 277         devstat_remove_entry(&softc->device_stats);
 278         cam_extend_release(chperiphs, periph->unit_number);
 279         xpt_print(periph->path, "removing device entry\n");
 280         dev_ops_remove_minor(&ch_ops, periph->unit_number);
 281         kfree(softc, M_DEVBUF);
 282 }
 283
 284 static void
 285 chasync(void *callback_arg, u_int32_t code, struct cam_path *path, void *arg)
 286 {
 287         struct cam_periph *periph;
 288
 289         periph = (struct cam_periph *)callback_arg;
 290
 291         switch(code) {
 292         case AC_FOUND_DEVICE:
 293         {
 294                 struct ccb_getdev *cgd;
 295                 cam_status status;
 296
 297                 cgd = (struct ccb_getdev *)arg;
 298                 if (cgd == NULL)
 299                         break;
 300
 301                 if (SID_TYPE(&cgd->inq_data)!= T_CHANGER)
 302                         break;
 303
 304                 /*
 305                  * Allocate a peripheral instance for
 306                  * this device and start the probe
 307                  * process.
 308                  */
 309                 status = cam_periph_alloc(chregister, choninvalidate,
 310                                           chcleanup, chstart, "ch",
 311                                           CAM_PERIPH_BIO, cgd->ccb_h.path,
 312                                           chasync, AC_FOUND_DEVICE, cgd);
 313
 314                 if (status != CAM_REQ_CMP
 315                  && status != CAM_REQ_INPROG)
 316                         kprintf("chasync: Unable to probe new device "
 317                                "due to status 0x%x\n", status);
 318
 319                 break;
 320
 321         }
 322         default:
 323                 cam_periph_async(periph, code, path, arg);
 324                 break;
 325         }
 326 }
 327
 328 static cam_status
 329 chregister(struct cam_periph *periph, void *arg)
 330 {
 331         struct ch_softc *softc;
 332         struct ccb_getdev *cgd;
 333
 334         cgd = (struct ccb_getdev *)arg;
 335         if (periph == NULL) {
 336                 kprintf("chregister: periph was NULL!!\n");
 337                 return(CAM_REQ_CMP_ERR);
 338         }
 339
 340         if (cgd == NULL) {
 341                 kprintf("chregister: no getdev CCB, can't register device\n");
 342                 return(CAM_REQ_CMP_ERR);
 343         }
 344
 345         softc = kmalloc(sizeof(*softc), M_DEVBUF, M_INTWAIT | M_ZERO);
 346         softc->state = CH_STATE_PROBE;
 347         periph->softc = softc;
 348         cam_extend_set(chperiphs, periph->unit_number, periph);
 349         softc->quirks = CH_Q_NONE;
 350
 351         /*
 352          * Changers don't have a blocksize, and obviously don't support
 353          * tagged queueing.
 354          */
 355         cam_periph_unlock(periph);
 356         devstat_add_entry(&softc->device_stats, "ch",
 357                           periph->unit_number, 0,
 358                           DEVSTAT_NO_BLOCKSIZE | DEVSTAT_NO_ORDERED_TAGS,
 359                           SID_TYPE(&cgd->inq_data)| DEVSTAT_TYPE_IF_SCSI,
 360                           DEVSTAT_PRIORITY_OTHER);
 361
 362         /* Register the device */
 363         make_dev(&ch_ops, periph->unit_number, UID_ROOT,
 364                   GID_OPERATOR, 0600, "%s%d", periph->periph_name,
 365                   periph->unit_number);
 366         cam_periph_lock(periph);
 367
 368         /*
 369          * Add an async callback so that we get
 370          * notified if this device goes away.
 371          */
 372         xpt_register_async(AC_LOST_DEVICE, chasync, periph, periph->path);
 373
 374         /*
 375          * Lock this periph until we are setup.
 376          * This first call can't block
 377          */
 378         cam_periph_hold(periph, 0);
 379         xpt_schedule(periph, /*priority*/5);
 380
 381         return(CAM_REQ_CMP);
 382 }
 383
 384 static int
 385 chopen(struct dev_open_args *ap)
 386 {
 387         cdev_t dev = ap->a_head.a_dev;
 388         struct cam_periph *periph;
 389         struct ch_softc *softc;
 390         int unit, error;
 391
 392         unit = CHUNIT(dev);
 393         periph = cam_extend_get(chperiphs, unit);
 394
 395         if (cam_periph_acquire(periph) != CAM_REQ_CMP)
 396                 return (ENXIO);
 397
 398         softc = (struct ch_softc *)periph->softc;
 399
 400         cam_periph_lock(periph);
 401
 402         if (softc->flags & CH_FLAG_INVALID) {
 403                 cam_periph_unlock(periph);
 404                 cam_periph_release(periph);
 405                 return(ENXIO);
 406         }
 407
 408         if ((softc->flags & CH_FLAG_OPEN) == 0)
 409                 softc->flags |= CH_FLAG_OPEN;
 410         else
 411                 cam_periph_release(periph);
 412
 413         if ((error = cam_periph_hold(periph, PCATCH)) != 0) {
 414                 cam_periph_unlock(periph);
 415                 cam_periph_release(periph);
 416                 return (error);
 417         }
 418
 419         /*
 420          * Load information about this changer device into the softc.
 421          */
 422         if ((error = chgetparams(periph)) != 0) {
 423                 softc->flags &= ~CH_FLAG_OPEN;
 424                 cam_periph_unhold(periph, 1);
 425                 cam_periph_release(periph);
 426         } else {
 427                 cam_periph_unhold(periph, 1);
 428         }
 429
 430         return(error);
 431 }
 432
 433 static int
 434 chclose(struct dev_close_args *ap)
 435 {
 436         cdev_t dev = ap->a_head.a_dev;
 437         struct  cam_periph *periph;
 438         struct  ch_softc *softc;
 439         int     unit;
 440
 441         unit = CHUNIT(dev);
 442         periph = cam_extend_get(chperiphs, unit);
 443         if (periph == NULL)
 444                 return(ENXIO);
 445
 446         softc = (struct ch_softc *)periph->softc;
 447
 448         cam_periph_lock(periph);
 449
 450         softc->flags &= ~CH_FLAG_OPEN;
 451
 452         cam_periph_unlock(periph);
 453         cam_periph_release(periph);
 454
 455         return(0);
 456 }
 457
 458 static void
 459 chstart(struct cam_periph *periph, union ccb *start_ccb)
 460 {
 461         struct ch_softc *softc;
 462
 463         softc = (struct ch_softc *)periph->softc;
 464
 465         switch (softc->state) {
 466         case CH_STATE_NORMAL:
 467         {
 468                 if (periph->immediate_priority <= periph->pinfo.priority){
 469                         start_ccb->ccb_h.ccb_state = CH_CCB_WAITING;
 470
 471                         SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
 472                                           periph_links.sle);
 473                         periph->immediate_priority = CAM_PRIORITY_NONE;
 474                         wakeup(&periph->ccb_list);
 475                 }
 476                 break;
 477         }
 478         case CH_STATE_PROBE:
 479         {
 480                 int mode_buffer_len;
 481                 void *mode_buffer;
 482
 483                 /*
 484                  * Include the block descriptor when calculating the mode
 485                  * buffer length,
 486                  */
 487                 mode_buffer_len = sizeof(struct scsi_mode_header_6) +
 488                                   sizeof(struct scsi_mode_blk_desc) +
 489                                  sizeof(struct page_element_address_assignment);
 490
 491                 mode_buffer = kmalloc(mode_buffer_len, M_SCSICH, M_INTWAIT | M_ZERO);
 492                 /*
 493                  * Get the element address assignment page.
 494                  */
 495                 scsi_mode_sense(&start_ccb->csio,
 496                                 /* retries */ 1,
 497                                 /* cbfcnp */ chdone,
 498                                 /* tag_action */ MSG_SIMPLE_Q_TAG,
 499                                 /* dbd */ (softc->quirks & CH_Q_NO_DBD) ?
 500                                         FALSE : TRUE,
 501                                 /* page_code */ SMS_PAGE_CTRL_CURRENT,
 502                                 /* page */ CH_ELEMENT_ADDR_ASSIGN_PAGE,
 503                                 /* param_buf */ (u_int8_t *)mode_buffer,
 504                                 /* param_len */ mode_buffer_len,
 505                                 /* sense_len */ SSD_FULL_SIZE,
 506                                 /* timeout */ CH_TIMEOUT_MODE_SENSE);
 507
 508                 start_ccb->ccb_h.ccb_bio = NULL;
 509                 start_ccb->ccb_h.ccb_state = CH_CCB_PROBE;
 510                 xpt_action(start_ccb);
 511                 break;
 512         }
 513         }
 514 }
 515
 516 static void
 517 chdone(struct cam_periph *periph, union ccb *done_ccb)
 518 {
 519         struct ch_softc *softc;
 520         struct ccb_scsiio *csio;
 521
 522         softc = (struct ch_softc *)periph->softc;
 523         csio = &done_ccb->csio;
 524
 525         switch(done_ccb->ccb_h.ccb_state) {
 526         case CH_CCB_POLLED:
 527                 /* Caller releases ccb */
 528                 wakeup(&done_ccb->ccb_h.cbfcnp);
 529                 return;
 530         case CH_CCB_PROBE:
 531         {
 532                 struct scsi_mode_header_6 *mode_header;
 533                 struct page_element_address_assignment *ea;
 534                 char announce_buf[80];
 535
 536
 537                 mode_header = (struct scsi_mode_header_6 *)csio->data_ptr;
 538
 539                 ea = (struct page_element_address_assignment *)
 540                         find_mode_page_6(mode_header);
 541
 542                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP){
 543
 544                         softc->sc_firsts[CHET_MT] = scsi_2btoul(ea->mtea);
 545                         softc->sc_counts[CHET_MT] = scsi_2btoul(ea->nmte);
 546                         softc->sc_firsts[CHET_ST] = scsi_2btoul(ea->fsea);
 547                         softc->sc_counts[CHET_ST] = scsi_2btoul(ea->nse);
 548                         softc->sc_firsts[CHET_IE] = scsi_2btoul(ea->fieea);
 549                         softc->sc_counts[CHET_IE] = scsi_2btoul(ea->niee);
 550                         softc->sc_firsts[CHET_DT] = scsi_2btoul(ea->fdtea);
 551                         softc->sc_counts[CHET_DT] = scsi_2btoul(ea->ndte);
 552                         softc->sc_picker = softc->sc_firsts[CHET_MT];
 553
 554 #define PLURAL(c)       (c) == 1 ? "" : "s"
 555                         ksnprintf(announce_buf, sizeof(announce_buf),
 556                                 "%d slot%s, %d drive%s, "
 557                                 "%d picker%s, %d portal%s",
 558                                 softc->sc_counts[CHET_ST],
 559                                 PLURAL(softc->sc_counts[CHET_ST]),
 560                                 softc->sc_counts[CHET_DT],
 561                                 PLURAL(softc->sc_counts[CHET_DT]),
 562                                 softc->sc_counts[CHET_MT],
 563                                 PLURAL(softc->sc_counts[CHET_MT]),
 564                                 softc->sc_counts[CHET_IE],
 565                                 PLURAL(softc->sc_counts[CHET_IE]));
 566 #undef PLURAL
 567                 } else {
 568                         int error;
 569
 570                         error = cherror(done_ccb, CAM_RETRY_SELTO,
 571                                         SF_RETRY_UA | SF_NO_PRINT);
 572                         /*
 573                          * Retry any UNIT ATTENTION type errors.  They
 574                          * are expected at boot.
 575                          */
 576                         if (error == ERESTART) {
 577                                 /*
 578                                  * A retry was scheuled, so
 579                                  * just return.
 580                                  */
 581                                 return;
 582                         } else if (error != 0) {
 583                                 int retry_scheduled;
 584                                 struct scsi_mode_sense_6 *sms;
 585
 586                                 sms = (struct scsi_mode_sense_6 *)
 587                                         done_ccb->csio.cdb_io.cdb_bytes;
 588
 589                                 /*
 590                                  * Check to see if block descriptors were
 591                                  * disabled.  Some devices don't like that.
 592                                  * We're taking advantage of the fact that
 593                                  * the first few bytes of the 6 and 10 byte
 594                                  * mode sense commands are the same.  If
 595                                  * block descriptors were disabled, enable
 596                                  * them and re-send the command.
 597                                  */
 598                                 if (sms->byte2 & SMS_DBD) {
 599                                         sms->byte2 &= ~SMS_DBD;
 600                                         xpt_action(done_ccb);
 601                                         softc->quirks |= CH_Q_NO_DBD;
 602                                         retry_scheduled = 1;
 603                                 } else
 604                                         retry_scheduled = 0;
 605
 606                                 /* Don't wedge this device's queue */
 607                                 cam_release_devq(done_ccb->ccb_h.path,
 608                                                  /*relsim_flags*/0,
 609                                                  /*reduction*/0,
 610                                                  /*timeout*/0,
 611                                                  /*getcount_only*/0);
 612
 613                                 if (retry_scheduled)
 614                                         return;
 615
 616                                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK)
 617                                     == CAM_SCSI_STATUS_ERROR)
 618                                         scsi_sense_print(&done_ccb->csio);
 619                                 else {
 620                                         xpt_print(periph->path,
 621                                             "got CAM status %#x\n",
 622                                             done_ccb->ccb_h.status);
 623                                 }
 624                                 xpt_print(periph->path, "fatal error, failed "
 625                                     "to attach to device\n");
 626
 627                                 cam_periph_invalidate(periph);
 628
 629                                 announce_buf[0] = '\0';
 630                         }
 631                 }
 632                 if (announce_buf[0] != '\0')
 633                         xpt_announce_periph(periph, announce_buf);
 634                 softc->state = CH_STATE_NORMAL;
 635                 kfree(mode_header, M_SCSICH);
 636                 /*
 637                  * Since our peripheral may be invalidated by an error
 638                  * above or an external event, we must release our CCB
 639                  * before releasing the probe lock on the peripheral.
 640                  * The peripheral will only go away once the last lock
 641                  * is removed, and we need it around for the CCB release
 642                  * operation.
 643                  */
 644                 xpt_release_ccb(done_ccb);
 645                 cam_periph_unhold(periph, 0);
 646                 return;
 647         }
 648         case CH_CCB_WAITING:
 649         {
 650                 /* Caller will release the CCB */
 651                 wakeup(&done_ccb->ccb_h.cbfcnp);
 652                 return;
 653         }
 654         default:
 655                 break;
 656         }
 657         xpt_release_ccb(done_ccb);
 658 }
 659
 660 static int
 661 cherror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
 662 {
 663         struct ch_softc *softc;
 664         struct cam_periph *periph;
 665
 666         periph = xpt_path_periph(ccb->ccb_h.path);
 667         softc = (struct ch_softc *)periph->softc;
 668
 669         return (cam_periph_error(ccb, cam_flags, sense_flags,
 670                                  &softc->saved_ccb));
 671 }
 672
 673 static int
 674 chioctl(struct dev_ioctl_args *ap)
 675 {
 676         cdev_t dev = ap->a_head.a_dev;
 677         caddr_t addr = ap->a_data;
 678         int flag = ap->a_fflag;
 679         struct cam_periph *periph;
 680         struct ch_softc *softc;
 681         u_int8_t unit;
 682         int error;
 683
 684         unit = CHUNIT(dev);
 685
 686         periph = cam_extend_get(chperiphs, unit);
 687         if (periph == NULL)
 688                 return(ENXIO);
 689
 690         cam_periph_lock(periph);
 691         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering chioctl\n"));
 692
 693         softc = (struct ch_softc *)periph->softc;
 694
 695         error = 0;
 696
 697         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
 698                   ("trying to do ioctl %#lx\n", ap->a_cmd));
 699
 700         /*
 701          * If this command can change the device's state, we must
 702          * have the device open for writing.
 703          */
 704         switch (ap->a_cmd) {
 705         case CHIOGPICKER:
 706         case CHIOGPARAMS:
 707         case CHIOGSTATUS:
 708                 break;
 709
 710         default:
 711                 if ((flag & FWRITE) == 0) {
 712                         cam_periph_unlock(periph);
 713                         return (EBADF);
 714                 }
 715         }
 716
 717         switch (ap->a_cmd) {
 718         case CHIOMOVE:
 719                 error = chmove(periph, (struct changer_move *)addr);
 720                 break;
 721
 722         case CHIOEXCHANGE:
 723                 error = chexchange(periph, (struct changer_exchange *)addr);
 724                 break;
 725
 726         case CHIOPOSITION:
 727                 error = chposition(periph, (struct changer_position *)addr);
 728                 break;
 729
 730         case CHIOGPICKER:
 731                 *(int *)addr = softc->sc_picker - softc->sc_firsts[CHET_MT];
 732                 break;
 733
 734         case CHIOSPICKER:
 735         {
 736                 int new_picker = *(int *)addr;
 737
 738                 if (new_picker > (softc->sc_counts[CHET_MT] - 1)) {
 739                         error = EINVAL;
 740                         break;
 741                 }
 742                 softc->sc_picker = softc->sc_firsts[CHET_MT] + new_picker;
 743                 break;
 744         }
 745         case CHIOGPARAMS:
 746         {
 747                 struct changer_params *cp = (struct changer_params *)addr;
 748
 749                 cp->cp_npickers = softc->sc_counts[CHET_MT];
 750                 cp->cp_nslots = softc->sc_counts[CHET_ST];
 751                 cp->cp_nportals = softc->sc_counts[CHET_IE];
 752                 cp->cp_ndrives = softc->sc_counts[CHET_DT];
 753                 break;
 754         }
 755         case CHIOIELEM:
 756                 error = chielem(periph, *(unsigned int *)addr);
 757                 break;
 758
 759         case CHIOGSTATUS:
 760         {
 761                 error = chgetelemstatus(periph,
 762                                (struct changer_element_status_request *) addr);
 763                 break;
 764         }
 765
 766         case CHIOSETVOLTAG:
 767         {
 768                 error = chsetvoltag(periph,
 769                                     (struct changer_set_voltag_request *) addr);
 770                 break;
 771         }
 772
 773         /* Implement prevent/allow? */
 774
 775         default:
 776                 error = cam_periph_ioctl(periph, ap->a_cmd, addr, cherror);
 777                 break;
 778         }
 779
 780         cam_periph_unlock(periph);
 781         return (error);
 782 }
 783
 784 static int
 785 chmove(struct cam_periph *periph, struct changer_move *cm)
 786 {
 787         struct ch_softc *softc;
 788         u_int16_t fromelem, toelem;
 789         union ccb *ccb;
 790         int error;
 791
 792         error = 0;
 793         softc = (struct ch_softc *)periph->softc;
 794
 795         /*
 796          * Check arguments.
 797          */
 798         if ((cm->cm_fromtype > CHET_DT) || (cm->cm_totype > CHET_DT))
 799                 return (EINVAL);
 800         if ((cm->cm_fromunit > (softc->sc_counts[cm->cm_fromtype] - 1)) ||
 801             (cm->cm_tounit > (softc->sc_counts[cm->cm_totype] - 1)))
 802                 return (ENODEV);
 803
 804         /*
 805          * Check the request against the changer's capabilities.
 806          */
 807         if ((softc->sc_movemask[cm->cm_fromtype] & (1 << cm->cm_totype)) == 0)
 808                 return (ENODEV);
 809
 810         /*
 811          * Calculate the source and destination elements.
 812          */
 813         fromelem = softc->sc_firsts[cm->cm_fromtype] + cm->cm_fromunit;
 814         toelem = softc->sc_firsts[cm->cm_totype] + cm->cm_tounit;
 815
 816         ccb = cam_periph_getccb(periph, /*priority*/ 1);
 817         ccb->ccb_h.ccb_state = CH_CCB_POLLED;
 818
 819         scsi_move_medium(&ccb->csio,
 820                          /* retries */ 1,
 821                          /* cbfcnp */ chdone,
 822                          /* tag_action */ MSG_SIMPLE_Q_TAG,
 823                          /* tea */ softc->sc_picker,
 824                          /* src */ fromelem,
 825                          /* dst */ toelem,
 826                          /* invert */ (cm->cm_flags & CM_INVERT) ? TRUE : FALSE,
 827                          /* sense_len */ SSD_FULL_SIZE,
 828                          /* timeout */ CH_TIMEOUT_MOVE_MEDIUM);
 829
 830         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/CAM_RETRY_SELTO,
 831                                   /*sense_flags*/ SF_RETRY_UA,
 832                                   &softc->device_stats);
 833
 834         xpt_release_ccb(ccb);
 835
 836         return(error);
 837 }
 838
 839 static int
 840 chexchange(struct cam_periph *periph, struct changer_exchange *ce)
 841 {
 842         struct ch_softc *softc;
 843         u_int16_t src, dst1, dst2;
 844         union ccb *ccb;
 845         int error;
 846
 847         error = 0;
 848         softc = (struct ch_softc *)periph->softc;
 849         /*
 850          * Check arguments.
 851          */
 852         if ((ce->ce_srctype > CHET_DT) || (ce->ce_fdsttype > CHET_DT) ||
 853             (ce->ce_sdsttype > CHET_DT))
 854                 return (EINVAL);
 855         if ((ce->ce_srcunit > (softc->sc_counts[ce->ce_srctype] - 1)) ||
 856             (ce->ce_fdstunit > (softc->sc_counts[ce->ce_fdsttype] - 1)) ||
 857             (ce->ce_sdstunit > (softc->sc_counts[ce->ce_sdsttype] - 1)))
 858                 return (ENODEV);
 859
 860         /*
 861          * Check the request against the changer's capabilities.
 862          */
 863         if (((softc->sc_exchangemask[ce->ce_srctype] &
 864              (1 << ce->ce_fdsttype)) == 0) ||
 865             ((softc->sc_exchangemask[ce->ce_fdsttype] &
 866              (1 << ce->ce_sdsttype)) == 0))
 867                 return (ENODEV);
 868
 869         /*
 870          * Calculate the source and destination elements.
 871          */
 872         src = softc->sc_firsts[ce->ce_srctype] + ce->ce_srcunit;
 873         dst1 = softc->sc_firsts[ce->ce_fdsttype] + ce->ce_fdstunit;
 874         dst2 = softc->sc_firsts[ce->ce_sdsttype] + ce->ce_sdstunit;
 875
 876         ccb = cam_periph_getccb(periph, /*priority*/ 1);
 877         ccb->ccb_h.ccb_state = CH_CCB_POLLED;
 878
 879         scsi_exchange_medium(&ccb->csio,
 880                              /* retries */ 1,
 881                              /* cbfcnp */ chdone,
 882                              /* tag_action */ MSG_SIMPLE_Q_TAG,
 883                              /* tea */ softc->sc_picker,
 884                              /* src */ src,
 885                              /* dst1 */ dst1,
 886                              /* dst2 */ dst2,
 887                              /* invert1 */ (ce->ce_flags & CE_INVERT1) ?
 888                                            TRUE : FALSE,
 889                              /* invert2 */ (ce->ce_flags & CE_INVERT2) ?
 890                                            TRUE : FALSE,
 891                              /* sense_len */ SSD_FULL_SIZE,
 892                              /* timeout */ CH_TIMEOUT_EXCHANGE_MEDIUM);
 893
 894         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/CAM_RETRY_SELTO,
 895                                   /*sense_flags*/ SF_RETRY_UA,
 896                                   &softc->device_stats);
 897
 898         xpt_release_ccb(ccb);
 899
 900         return(error);
 901 }
 902
 903 static int
 904 chposition(struct cam_periph *periph, struct changer_position *cp)
 905 {
 906         struct ch_softc *softc;
 907         u_int16_t dst;
 908         union ccb *ccb;
 909         int error;
 910
 911         error = 0;
 912         softc = (struct ch_softc *)periph->softc;
 913
 914         /*
 915          * Check arguments.
 916          */
 917         if (cp->cp_type > CHET_DT)
 918                 return (EINVAL);
 919         if (cp->cp_unit > (softc->sc_counts[cp->cp_type] - 1))
 920                 return (ENODEV);
 921
 922         /*
 923          * Calculate the destination element.
 924          */
 925         dst = softc->sc_firsts[cp->cp_type] + cp->cp_unit;
 926
 927         ccb = cam_periph_getccb(periph, /*priority*/ 1);
 928         ccb->ccb_h.ccb_state = CH_CCB_POLLED;
 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         ccb->ccb_h.ccb_state = CH_CCB_POLLED;
1087
1088         scsi_read_element_status(&ccb->csio,
1089                                  /* retries */ 1,
1090                                  /* cbfcnp */ chdone,
1091                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
1092                                  /* voltag */ want_voltags,
1093                                  /* sea */ softc->sc_firsts[chet],
1094                                  /* count */ 1,
1095                                  /* data_ptr */ data,
1096                                  /* dxfer_len */ 1024,
1097                                  /* sense_len */ SSD_FULL_SIZE,
1098                                  /* timeout */ CH_TIMEOUT_READ_ELEMENT_STATUS);
1099
1100         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1101                                   /*sense_flags*/ SF_RETRY_UA,
1102                                   &softc->device_stats);
1103
1104         if (error)
1105                 goto done;
1106         cam_periph_unlock(periph);
1107
1108         st_hdr = (struct read_element_status_header *)data;
1109         pg_hdr = (struct read_element_status_page_header *)((uintptr_t)st_hdr +
1110                   sizeof(struct read_element_status_header));
1111         desclen = scsi_2btoul(pg_hdr->edl);
1112
1113         size = sizeof(struct read_element_status_header) +
1114                sizeof(struct read_element_status_page_header) +
1115                (desclen * cesr->cesr_element_count);
1116
1117         /*
1118          * Reallocate storage for descriptors and get them from the
1119          * device.
1120          */
1121         kfree(data, M_DEVBUF);
1122         data = (caddr_t)kmalloc(size, M_DEVBUF, M_INTWAIT);
1123
1124         cam_periph_lock(periph);
1125         scsi_read_element_status(&ccb->csio,
1126                                  /* retries */ 1,
1127                                  /* cbfcnp */ chdone,
1128                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
1129                                  /* voltag */ want_voltags,
1130                                  /* sea */ softc->sc_firsts[chet]
1131                                  + cesr->cesr_element_base,
1132                                  /* count */ cesr->cesr_element_count,
1133                                  /* data_ptr */ data,
1134                                  /* dxfer_len */ size,
1135                                  /* sense_len */ SSD_FULL_SIZE,
1136                                  /* timeout */ CH_TIMEOUT_READ_ELEMENT_STATUS);
1137
1138         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1139                                   /*sense_flags*/ SF_RETRY_UA,
1140                                   &softc->device_stats);
1141
1142         if (error)
1143                 goto done;
1144         cam_periph_unlock(periph);
1145
1146         /*
1147          * Fill in the user status array.
1148          */
1149         st_hdr = (struct read_element_status_header *)data;
1150         pg_hdr = (struct read_element_status_page_header *)((uintptr_t)st_hdr +
1151                   sizeof(struct read_element_status_header));
1152         avail = scsi_2btoul(st_hdr->count);
1153
1154         if (avail != cesr->cesr_element_count) {
1155                 xpt_print(periph->path,
1156                     "warning, READ ELEMENT STATUS avail != count\n");
1157         }
1158
1159         user_data = (struct changer_element_status *)
1160                 kmalloc(avail * sizeof(struct changer_element_status),
1161                        M_DEVBUF, M_INTWAIT | M_ZERO);
1162
1163         desc = (struct read_element_status_descriptor *)((uintptr_t)data +
1164                 sizeof(struct read_element_status_header) +
1165                 sizeof(struct read_element_status_page_header));
1166         /*
1167          * Set up the individual element status structures
1168          */
1169         for (i = 0; i < avail; ++i) {
1170                 struct changer_element_status *ces = &(user_data[i]);
1171
1172                 copy_element_status(softc, pg_hdr->flags, desc, ces);
1173
1174                 desc = (struct read_element_status_descriptor *)
1175                        ((uintptr_t)desc + desclen);
1176         }
1177
1178         /* Copy element status structures out to userspace. */
1179         error = copyout(user_data,
1180                         cesr->cesr_element_status,
1181                         avail * sizeof(struct changer_element_status));
1182         cam_periph_lock(periph);
1183
1184  done:
1185         xpt_release_ccb(ccb);
1186
1187         if (data != NULL)
1188                 kfree(data, M_DEVBUF);
1189         if (user_data != NULL)
1190                 kfree(user_data, M_DEVBUF);
1191
1192         return (error);
1193 }
1194
1195 static int
1196 chielem(struct cam_periph *periph,
1197         unsigned int timeout)
1198 {
1199         union ccb *ccb;
1200         struct ch_softc *softc;
1201         int error;
1202
1203         if (!timeout) {
1204                 timeout = CH_TIMEOUT_INITIALIZE_ELEMENT_STATUS;
1205         } else {
1206                 timeout *= 1000;
1207         }
1208
1209         error = 0;
1210         softc = (struct ch_softc *)periph->softc;
1211
1212         ccb = cam_periph_getccb(periph, /*priority*/ 1);
1213         ccb->ccb_h.ccb_state = CH_CCB_POLLED;
1214
1215         scsi_initialize_element_status(&ccb->csio,
1216                                       /* retries */ 1,
1217                                       /* cbfcnp */ chdone,
1218                                       /* tag_action */ MSG_SIMPLE_Q_TAG,
1219                                       /* sense_len */ SSD_FULL_SIZE,
1220                                       /* timeout */ timeout);
1221
1222         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1223                                   /*sense_flags*/ SF_RETRY_UA,
1224                                   &softc->device_stats);
1225
1226         xpt_release_ccb(ccb);
1227
1228         return(error);
1229 }
1230
1231 static int
1232 chsetvoltag(struct cam_periph *periph,
1233             struct changer_set_voltag_request *csvr)
1234 {
1235         union ccb *ccb;
1236         struct ch_softc *softc;
1237         u_int16_t ea;
1238         u_int8_t sac;
1239         struct scsi_send_volume_tag_parameters ssvtp;
1240         int error;
1241         int i;
1242
1243         error = 0;
1244         softc = (struct ch_softc *)periph->softc;
1245
1246         bzero(&ssvtp, sizeof(ssvtp));
1247         for (i=0; i<sizeof(ssvtp.vitf); i++) {
1248                 ssvtp.vitf[i] = ' ';
1249         }
1250
1251         /*
1252          * Check arguments.
1253          */
1254         if (csvr->csvr_type > CHET_DT)
1255                 return EINVAL;
1256         if (csvr->csvr_addr > (softc->sc_counts[csvr->csvr_type] - 1))
1257                 return ENODEV;
1258
1259         ea = softc->sc_firsts[csvr->csvr_type] + csvr->csvr_addr;
1260
1261         if (csvr->csvr_flags & CSVR_ALTERNATE) {
1262                 switch (csvr->csvr_flags & CSVR_MODE_MASK) {
1263                 case CSVR_MODE_SET:
1264                         sac = SEND_VOLUME_TAG_ASSERT_ALTERNATE;
1265                         break;
1266                 case CSVR_MODE_REPLACE:
1267                         sac = SEND_VOLUME_TAG_REPLACE_ALTERNATE;
1268                         break;
1269                 case CSVR_MODE_CLEAR:
1270                         sac = SEND_VOLUME_TAG_UNDEFINED_ALTERNATE;
1271                         break;
1272                 default:
1273                         error = EINVAL;
1274                         goto out;
1275                 }
1276         } else {
1277                 switch (csvr->csvr_flags & CSVR_MODE_MASK) {
1278                 case CSVR_MODE_SET:
1279                         sac = SEND_VOLUME_TAG_ASSERT_PRIMARY;
1280                         break;
1281                 case CSVR_MODE_REPLACE:
1282                         sac = SEND_VOLUME_TAG_REPLACE_PRIMARY;
1283                         break;
1284                 case CSVR_MODE_CLEAR:
1285                         sac = SEND_VOLUME_TAG_UNDEFINED_PRIMARY;
1286                         break;
1287                 default:
1288                         error = EINVAL;
1289                         goto out;
1290                 }
1291         }
1292
1293         memcpy(ssvtp.vitf, csvr->csvr_voltag.cv_volid,
1294                min(strlen(csvr->csvr_voltag.cv_volid), sizeof(ssvtp.vitf)));
1295         scsi_ulto2b(csvr->csvr_voltag.cv_serial, ssvtp.minvsn);
1296
1297         ccb = cam_periph_getccb(periph, /*priority*/ 1);
1298         ccb->ccb_h.ccb_state = CH_CCB_POLLED;
1299
1300         scsi_send_volume_tag(&ccb->csio,
1301                              /* retries */ 1,
1302                              /* cbfcnp */ chdone,
1303                              /* tag_action */ MSG_SIMPLE_Q_TAG,
1304                              /* element_address */ ea,
1305                              /* send_action_code */ sac,
1306                              /* parameters */ &ssvtp,
1307                              /* sense_len */ SSD_FULL_SIZE,
1308                              /* timeout */ CH_TIMEOUT_SEND_VOLTAG);
1309
1310         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1311                                   /*sense_flags*/ SF_RETRY_UA,
1312                                   &softc->device_stats);
1313
1314         xpt_release_ccb(ccb);
1315
1316  out:
1317         return error;
1318 }
1319
1320 static int
1321 chgetparams(struct cam_periph *periph)
1322 {
1323         union ccb *ccb;
1324         struct ch_softc *softc;
1325         void *mode_buffer;
1326         int mode_buffer_len;
1327         struct page_element_address_assignment *ea;
1328         struct page_device_capabilities *cap;
1329         int error, from, dbd;
1330         u_int8_t *moves, *exchanges;
1331
1332         error = 0;
1333
1334         softc = (struct ch_softc *)periph->softc;
1335
1336         ccb = cam_periph_getccb(periph, /*priority*/ 1);
1337         ccb->ccb_h.ccb_state = CH_CCB_POLLED;
1338
1339         /*
1340          * The scsi_mode_sense_data structure is just a convenience
1341          * structure that allows us to easily calculate the worst-case
1342          * storage size of the mode sense buffer.
1343          */
1344         mode_buffer_len = sizeof(struct scsi_mode_sense_data);
1345
1346         mode_buffer = kmalloc(mode_buffer_len, M_SCSICH, M_INTWAIT | M_ZERO);
1347
1348         if (softc->quirks & CH_Q_NO_DBD)
1349                 dbd = FALSE;
1350         else
1351                 dbd = TRUE;
1352
1353         /*
1354          * Get the element address assignment page.
1355          */
1356         scsi_mode_sense(&ccb->csio,
1357                         /* retries */ 1,
1358                         /* cbfcnp */ chdone,
1359                         /* tag_action */ MSG_SIMPLE_Q_TAG,
1360                         /* dbd */ dbd,
1361                         /* page_code */ SMS_PAGE_CTRL_CURRENT,
1362                         /* page */ CH_ELEMENT_ADDR_ASSIGN_PAGE,
1363                         /* param_buf */ (u_int8_t *)mode_buffer,
1364                         /* param_len */ mode_buffer_len,
1365                         /* sense_len */ SSD_FULL_SIZE,
1366                         /* timeout */ CH_TIMEOUT_MODE_SENSE);
1367
1368         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1369                                   /* sense_flags */ SF_RETRY_UA|SF_NO_PRINT,
1370                                   &softc->device_stats);
1371
1372         if (error) {
1373                 if (dbd) {
1374                         struct scsi_mode_sense_6 *sms;
1375
1376                         sms = (struct scsi_mode_sense_6 *)
1377                                 ccb->csio.cdb_io.cdb_bytes;
1378
1379                         sms->byte2 &= ~SMS_DBD;
1380                         error = cam_periph_runccb(ccb, cherror,
1381                                                   /*cam_flags*/ CAM_RETRY_SELTO,
1382                                                   /*sense_flags*/ SF_RETRY_UA,
1383                                                   &softc->device_stats);
1384                 } else {
1385                         /*
1386                          * Since we disabled sense printing above, print
1387                          * out the sense here since we got an error.
1388                          */
1389                         scsi_sense_print(&ccb->csio);
1390                 }
1391
1392                 if (error) {
1393                         xpt_print(periph->path,
1394                             "chgetparams: error getting element "
1395                             "address page\n");
1396                         xpt_release_ccb(ccb);
1397                         kfree(mode_buffer, M_SCSICH);
1398                         return(error);
1399                 }
1400         }
1401
1402         ea = (struct page_element_address_assignment *)
1403                 find_mode_page_6((struct scsi_mode_header_6 *)mode_buffer);
1404
1405         softc->sc_firsts[CHET_MT] = scsi_2btoul(ea->mtea);
1406         softc->sc_counts[CHET_MT] = scsi_2btoul(ea->nmte);
1407         softc->sc_firsts[CHET_ST] = scsi_2btoul(ea->fsea);
1408         softc->sc_counts[CHET_ST] = scsi_2btoul(ea->nse);
1409         softc->sc_firsts[CHET_IE] = scsi_2btoul(ea->fieea);
1410         softc->sc_counts[CHET_IE] = scsi_2btoul(ea->niee);
1411         softc->sc_firsts[CHET_DT] = scsi_2btoul(ea->fdtea);
1412         softc->sc_counts[CHET_DT] = scsi_2btoul(ea->ndte);
1413
1414         bzero(mode_buffer, mode_buffer_len);
1415
1416         /*
1417          * Now get the device capabilities page.
1418          */
1419         scsi_mode_sense(&ccb->csio,
1420                         /* retries */ 1,
1421                         /* cbfcnp */ chdone,
1422                         /* tag_action */ MSG_SIMPLE_Q_TAG,
1423                         /* dbd */ dbd,
1424                         /* page_code */ SMS_PAGE_CTRL_CURRENT,
1425                         /* page */ CH_DEVICE_CAP_PAGE,
1426                         /* param_buf */ (u_int8_t *)mode_buffer,
1427                         /* param_len */ mode_buffer_len,
1428                         /* sense_len */ SSD_FULL_SIZE,
1429                         /* timeout */ CH_TIMEOUT_MODE_SENSE);
1430
1431         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1432                                   /* sense_flags */ SF_RETRY_UA | SF_NO_PRINT,
1433                                   &softc->device_stats);
1434
1435         if (error) {
1436                 if (dbd) {
1437                         struct scsi_mode_sense_6 *sms;
1438
1439                         sms = (struct scsi_mode_sense_6 *)
1440                                 ccb->csio.cdb_io.cdb_bytes;
1441
1442                         sms->byte2 &= ~SMS_DBD;
1443                         error = cam_periph_runccb(ccb, cherror,
1444                                                   /*cam_flags*/ CAM_RETRY_SELTO,
1445                                                   /*sense_flags*/ SF_RETRY_UA,
1446                                                   &softc->device_stats);
1447                 } else {
1448                         /*
1449                          * Since we disabled sense printing above, print
1450                          * out the sense here since we got an error.
1451                          */
1452                         scsi_sense_print(&ccb->csio);
1453                 }
1454
1455                 if (error) {
1456                         xpt_print(periph->path,
1457                             "chgetparams: error getting device "
1458                             "capabilities page\n");
1459                         xpt_release_ccb(ccb);
1460                         kfree(mode_buffer, M_SCSICH);
1461                         return(error);
1462                 }
1463         }
1464
1465         xpt_release_ccb(ccb);
1466
1467         cap = (struct page_device_capabilities *)
1468                 find_mode_page_6((struct scsi_mode_header_6 *)mode_buffer);
1469
1470         bzero(softc->sc_movemask, sizeof(softc->sc_movemask));
1471         bzero(softc->sc_exchangemask, sizeof(softc->sc_exchangemask));
1472         moves = cap->move_from;
1473         exchanges = cap->exchange_with;
1474         for (from = CHET_MT; from <= CHET_MAX; ++from) {
1475                 softc->sc_movemask[from] = moves[from];
1476                 softc->sc_exchangemask[from] = exchanges[from];
1477         }
1478
1479         kfree(mode_buffer, M_SCSICH);
1480
1481         return(error);
1482 }
1483
1484 void
1485 scsi_move_medium(struct ccb_scsiio *csio, u_int32_t retries,
1486                  void (*cbfcnp)(struct cam_periph *, union ccb *),
1487                  u_int8_t tag_action, u_int32_t tea, u_int32_t src,
1488                  u_int32_t dst, int invert, u_int8_t sense_len,
1489                  u_int32_t timeout)
1490 {
1491         struct scsi_move_medium *scsi_cmd;
1492
1493         scsi_cmd = (struct scsi_move_medium *)&csio->cdb_io.cdb_bytes;
1494         bzero(scsi_cmd, sizeof(*scsi_cmd));
1495
1496         scsi_cmd->opcode = MOVE_MEDIUM;
1497
1498         scsi_ulto2b(tea, scsi_cmd->tea);
1499         scsi_ulto2b(src, scsi_cmd->src);
1500         scsi_ulto2b(dst, scsi_cmd->dst);
1501
1502         if (invert)
1503                 scsi_cmd->invert |= MOVE_MEDIUM_INVERT;
1504
1505         cam_fill_csio(csio,
1506                       retries,
1507                       cbfcnp,
1508                       /*flags*/ CAM_DIR_NONE,
1509                       tag_action,
1510                       /*data_ptr*/ NULL,
1511                       /*dxfer_len*/ 0,
1512                       sense_len,
1513                       sizeof(*scsi_cmd),
1514                       timeout);
1515 }
1516
1517 void
1518 scsi_exchange_medium(struct ccb_scsiio *csio, u_int32_t retries,
1519                      void (*cbfcnp)(struct cam_periph *, union ccb *),
1520                      u_int8_t tag_action, u_int32_t tea, u_int32_t src,
1521                      u_int32_t dst1, u_int32_t dst2, int invert1,
1522                      int invert2, u_int8_t sense_len, u_int32_t timeout)
1523 {
1524         struct scsi_exchange_medium *scsi_cmd;
1525
1526         scsi_cmd = (struct scsi_exchange_medium *)&csio->cdb_io.cdb_bytes;
1527         bzero(scsi_cmd, sizeof(*scsi_cmd));
1528
1529         scsi_cmd->opcode = EXCHANGE_MEDIUM;
1530
1531         scsi_ulto2b(tea, scsi_cmd->tea);
1532         scsi_ulto2b(src, scsi_cmd->src);
1533         scsi_ulto2b(dst1, scsi_cmd->fdst);
1534         scsi_ulto2b(dst2, scsi_cmd->sdst);
1535
1536         if (invert1)
1537                 scsi_cmd->invert |= EXCHANGE_MEDIUM_INV1;
1538
1539         if (invert2)
1540                 scsi_cmd->invert |= EXCHANGE_MEDIUM_INV2;
1541
1542         cam_fill_csio(csio,
1543                       retries,
1544                       cbfcnp,
1545                       /*flags*/ CAM_DIR_NONE,
1546                       tag_action,
1547                       /*data_ptr*/ NULL,
1548                       /*dxfer_len*/ 0,
1549                       sense_len,
1550                       sizeof(*scsi_cmd),
1551                       timeout);
1552 }
1553
1554 void
1555 scsi_position_to_element(struct ccb_scsiio *csio, u_int32_t retries,
1556                          void (*cbfcnp)(struct cam_periph *, union ccb *),
1557                          u_int8_t tag_action, u_int32_t tea, u_int32_t dst,
1558                          int invert, u_int8_t sense_len, u_int32_t timeout)
1559 {
1560         struct scsi_position_to_element *scsi_cmd;
1561
1562         scsi_cmd = (struct scsi_position_to_element *)&csio->cdb_io.cdb_bytes;
1563         bzero(scsi_cmd, sizeof(*scsi_cmd));
1564
1565         scsi_cmd->opcode = POSITION_TO_ELEMENT;
1566
1567         scsi_ulto2b(tea, scsi_cmd->tea);
1568         scsi_ulto2b(dst, scsi_cmd->dst);
1569
1570         if (invert)
1571                 scsi_cmd->invert |= POSITION_TO_ELEMENT_INVERT;
1572
1573         cam_fill_csio(csio,
1574                       retries,
1575                       cbfcnp,
1576                       /*flags*/ CAM_DIR_NONE,
1577                       tag_action,
1578                       /*data_ptr*/ NULL,
1579                       /*dxfer_len*/ 0,
1580                       sense_len,
1581                       sizeof(*scsi_cmd),
1582                       timeout);
1583 }
1584
1585 void
1586 scsi_read_element_status(struct ccb_scsiio *csio, u_int32_t retries,
1587                          void (*cbfcnp)(struct cam_periph *, union ccb *),
1588                          u_int8_t tag_action, int voltag, u_int32_t sea,
1589                          u_int32_t count, u_int8_t *data_ptr,
1590                          u_int32_t dxfer_len, u_int8_t sense_len,
1591                          u_int32_t timeout)
1592 {
1593         struct scsi_read_element_status *scsi_cmd;
1594
1595         scsi_cmd = (struct scsi_read_element_status *)&csio->cdb_io.cdb_bytes;
1596         bzero(scsi_cmd, sizeof(*scsi_cmd));
1597
1598         scsi_cmd->opcode = READ_ELEMENT_STATUS;
1599
1600         scsi_ulto2b(sea, scsi_cmd->sea);
1601         scsi_ulto2b(count, scsi_cmd->count);
1602         scsi_ulto3b(dxfer_len, scsi_cmd->len);
1603
1604         if (voltag)
1605                 scsi_cmd->byte2 |= READ_ELEMENT_STATUS_VOLTAG;
1606
1607         cam_fill_csio(csio,
1608                       retries,
1609                       cbfcnp,
1610                       /*flags*/ CAM_DIR_IN,
1611                       tag_action,
1612                       data_ptr,
1613                       dxfer_len,
1614                       sense_len,
1615                       sizeof(*scsi_cmd),
1616                       timeout);
1617 }
1618
1619 void
1620 scsi_initialize_element_status(struct ccb_scsiio *csio, u_int32_t retries,
1621                                void (*cbfcnp)(struct cam_periph *, union ccb *),
1622                                u_int8_t tag_action, u_int8_t sense_len,
1623                                u_int32_t timeout)
1624 {
1625         struct scsi_initialize_element_status *scsi_cmd;
1626
1627         scsi_cmd = (struct scsi_initialize_element_status *)
1628                     &csio->cdb_io.cdb_bytes;
1629         bzero(scsi_cmd, sizeof(*scsi_cmd));
1630
1631         scsi_cmd->opcode = INITIALIZE_ELEMENT_STATUS;
1632
1633         cam_fill_csio(csio,
1634                       retries,
1635                       cbfcnp,
1636                       /*flags*/ CAM_DIR_NONE,
1637                       tag_action,
1638                       /* data_ptr */ NULL,
1639                       /* dxfer_len */ 0,
1640                       sense_len,
1641                       sizeof(*scsi_cmd),
1642                       timeout);
1643 }
1644
1645 void
1646 scsi_send_volume_tag(struct ccb_scsiio *csio, u_int32_t retries,
1647                      void (*cbfcnp)(struct cam_periph *, union ccb *),
1648                      u_int8_t tag_action,
1649                      u_int16_t element_address,
1650                      u_int8_t send_action_code,
1651                      struct scsi_send_volume_tag_parameters *parameters,
1652                      u_int8_t sense_len, u_int32_t timeout)
1653 {
1654         struct scsi_send_volume_tag *scsi_cmd;
1655
1656         scsi_cmd = (struct scsi_send_volume_tag *) &csio->cdb_io.cdb_bytes;
1657         bzero(scsi_cmd, sizeof(*scsi_cmd));
1658
1659         scsi_cmd->opcode = SEND_VOLUME_TAG;
1660         scsi_ulto2b(element_address, scsi_cmd->ea);
1661         scsi_cmd->sac = send_action_code;
1662         scsi_ulto2b(sizeof(*parameters), scsi_cmd->pll);
1663
1664         cam_fill_csio(csio,
1665                       retries,
1666                       cbfcnp,
1667                       /*flags*/ CAM_DIR_OUT,
1668                       tag_action,
1669                       /* data_ptr */ (u_int8_t *) parameters,
1670                       sizeof(*parameters),
1671                       sense_len,
1672                       sizeof(*scsi_cmd),
1673                       timeout);
1674 }