sys/cam/scsi/scsi_cd.c

   1 /*-
   2  * Copyright (c) 1997 Justin T. Gibbs.
   3  * Copyright (c) 1997, 1998, 1999, 2000, 2001, 2002, 2003 Kenneth D. Merry.
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions, and the following disclaimer,
  11  *    without modification, immediately at the beginning of the file.
  12  * 2. The name of the author may not be used to endorse or promote products
  13  *    derived from this software without specific prior written permission.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  18  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  19  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  25  * SUCH DAMAGE.
  26  */
  27
  28 /*-
  29  * Portions of this driver taken from the original FreeBSD cd driver.
  30  * Written by Julian Elischer (julian@tfs.com)
  31  * for TRW Financial Systems for use under the MACH(2.5) operating system.
  32  *
  33  * TRW Financial Systems, in accordance with their agreement with Carnegie
  34  * Mellon University, makes this software available to CMU to distribute
  35  * or use in any manner that they see fit as long as this message is kept with
  36  * the software. For this reason TFS also grants any other persons or
  37  * organisations permission to use or modify this software.
  38  *
  39  * TFS supplies this software to be publicly redistributed
  40  * on the understanding that TFS is not responsible for the correct
  41  * functioning of this software in any circumstances.
  42  *
  43  * Ported to run under 386BSD by Julian Elischer (julian@tfs.com) Sept 1992
  44  *
  45  *      from: cd.c,v 1.83 1997/05/04 15:24:22 joerg Exp $
  46  */
  47
  48 #include <sys/cdefs.h>
  49 __FBSDID("$FreeBSD$");
  50
  51 #include "opt_cd.h"
  52
  53 #include <sys/param.h>
  54 #include <sys/systm.h>
  55 #include <sys/kernel.h>
  56 #include <sys/bio.h>
  57 #include <sys/conf.h>
  58 #include <sys/disk.h>
  59 #include <sys/malloc.h>
  60 #include <sys/cdio.h>
  61 #include <sys/cdrio.h>
  62 #include <sys/dvdio.h>
  63 #include <sys/devicestat.h>
  64 #include <sys/sysctl.h>
  65 #include <sys/taskqueue.h>
  66 #include <geom/geom_disk.h>
  67
  68 #include <cam/cam.h>
  69 #include <cam/cam_ccb.h>
  70 #include <cam/cam_periph.h>
  71 #include <cam/cam_xpt_periph.h>
  72 #include <cam/cam_queue.h>
  73 #include <cam/cam_sim.h>
  74
  75 #include <cam/scsi/scsi_message.h>
  76 #include <cam/scsi/scsi_da.h>
  77 #include <cam/scsi/scsi_cd.h>
  78
  79 #define LEADOUT         0xaa            /* leadout toc entry */
  80
  81 struct cd_params {
  82         u_int32_t blksize;
  83         u_long    disksize;
  84 };
  85
  86 typedef enum {
  87         CD_Q_NONE               = 0x00,
  88         CD_Q_NO_TOUCH           = 0x01,
  89         CD_Q_BCD_TRACKS         = 0x02,
  90         CD_Q_NO_CHANGER         = 0x04,
  91         CD_Q_CHANGER            = 0x08,
  92         CD_Q_10_BYTE_ONLY       = 0x10
  93 } cd_quirks;
  94
  95 typedef enum {
  96         CD_FLAG_INVALID         = 0x0001,
  97         CD_FLAG_NEW_DISC        = 0x0002,
  98         CD_FLAG_DISC_LOCKED     = 0x0004,
  99         CD_FLAG_DISC_REMOVABLE  = 0x0008,
 100         CD_FLAG_TAGGED_QUEUING  = 0x0010,
 101         CD_FLAG_CHANGER         = 0x0040,
 102         CD_FLAG_ACTIVE          = 0x0080,
 103         CD_FLAG_SCHED_ON_COMP   = 0x0100,
 104         CD_FLAG_RETRY_UA        = 0x0200,
 105         CD_FLAG_VALID_MEDIA     = 0x0400,
 106         CD_FLAG_VALID_TOC       = 0x0800,
 107         CD_FLAG_SCTX_INIT       = 0x1000,
 108         CD_FLAG_OPEN            = 0x2000
 109 } cd_flags;
 110
 111 typedef enum {
 112         CD_CCB_PROBE            = 0x01,
 113         CD_CCB_BUFFER_IO        = 0x02,
 114         CD_CCB_WAITING          = 0x03,
 115         CD_CCB_TYPE_MASK        = 0x0F,
 116         CD_CCB_RETRY_UA         = 0x10
 117 } cd_ccb_state;
 118
 119 typedef enum {
 120         CHANGER_TIMEOUT_SCHED           = 0x01,
 121         CHANGER_SHORT_TMOUT_SCHED       = 0x02,
 122         CHANGER_MANUAL_CALL             = 0x04,
 123         CHANGER_NEED_TIMEOUT            = 0x08
 124 } cd_changer_flags;
 125
 126 #define ccb_state ppriv_field0
 127 #define ccb_bp ppriv_ptr1
 128
 129 struct cd_tocdata {
 130         struct ioc_toc_header header;
 131         struct cd_toc_entry entries[100];
 132 };
 133
 134 struct cd_toc_single {
 135         struct ioc_toc_header header;
 136         struct cd_toc_entry entry;
 137 };
 138
 139 typedef enum {
 140         CD_STATE_PROBE,
 141         CD_STATE_NORMAL
 142 } cd_state;
 143
 144 struct cd_softc {
 145         cam_pinfo               pinfo;
 146         cd_state                state;
 147         volatile cd_flags       flags;
 148         struct bio_queue_head   bio_queue;
 149         LIST_HEAD(, ccb_hdr)    pending_ccbs;
 150         struct cd_params        params;
 151         union ccb               saved_ccb;
 152         cd_quirks               quirks;
 153         STAILQ_ENTRY(cd_softc)  changer_links;
 154         struct cdchanger        *changer;
 155         int                     bufs_left;
 156         struct cam_periph       *periph;
 157         int                     minimum_command_size;
 158         int                     outstanding_cmds;
 159         struct task             sysctl_task;
 160         struct sysctl_ctx_list  sysctl_ctx;
 161         struct sysctl_oid       *sysctl_tree;
 162         STAILQ_HEAD(, cd_mode_params)   mode_queue;
 163         struct cd_tocdata       toc;
 164         struct disk             *disk;
 165 };
 166
 167 struct cd_page_sizes {
 168         int page;
 169         int page_size;
 170 };
 171
 172 static struct cd_page_sizes cd_page_size_table[] =
 173 {
 174         { AUDIO_PAGE, sizeof(struct cd_audio_page)}
 175 };
 176
 177 struct cd_quirk_entry {
 178         struct scsi_inquiry_pattern inq_pat;
 179         cd_quirks quirks;
 180 };
 181
 182 /*
 183  * The changer quirk entries aren't strictly necessary.  Basically, what
 184  * they do is tell cdregister() up front that a device is a changer.
 185  * Otherwise, it will figure that fact out once it sees a LUN on the device
 186  * that is greater than 0.  If it is known up front that a device is a changer,
 187  * all I/O to the device will go through the changer scheduling routines, as
 188  * opposed to the "normal" CD code.
 189  *
 190  * NOTE ON 10_BYTE_ONLY quirks:  Any 10_BYTE_ONLY quirks MUST be because
 191  * your device hangs when it gets a 10 byte command.  Adding a quirk just
 192  * to get rid of the informative diagnostic message is not acceptable.  All
 193  * 10_BYTE_ONLY quirks must be documented in full in a PR (which should be
 194  * referenced in a comment along with the quirk) , and must be approved by
 195  * ken@FreeBSD.org.  Any quirks added that don't adhere to this policy may
 196  * be removed until the submitter can explain why they are needed.
 197  * 10_BYTE_ONLY quirks will be removed (as they will no longer be necessary)
 198  * when the CAM_NEW_TRAN_CODE work is done.
 199  */
 200 static struct cd_quirk_entry cd_quirk_table[] =
 201 {
 202         {
 203                 { T_CDROM, SIP_MEDIA_REMOVABLE, "NRC", "MBR-7", "*"},
 204                  /*quirks*/ CD_Q_CHANGER
 205         },
 206         {
 207                 { T_CDROM, SIP_MEDIA_REMOVABLE, "PIONEER", "CD-ROM DRM*",
 208                   "*"}, /* quirks */ CD_Q_CHANGER
 209         },
 210         {
 211                 { T_CDROM, SIP_MEDIA_REMOVABLE, "NAKAMICH", "MJ-*", "*"},
 212                  /* quirks */ CD_Q_CHANGER
 213         },
 214         {
 215                 { T_CDROM, SIP_MEDIA_REMOVABLE, "CHINON", "CD-ROM CDS-535","*"},
 216                 /* quirks */ CD_Q_BCD_TRACKS
 217         }
 218 };
 219
 220 static  disk_open_t     cdopen;
 221 static  disk_close_t    cdclose;
 222 static  disk_ioctl_t    cdioctl;
 223 static  disk_strategy_t cdstrategy;
 224
 225 static  periph_init_t   cdinit;
 226 static  periph_ctor_t   cdregister;
 227 static  periph_dtor_t   cdcleanup;
 228 static  periph_start_t  cdstart;
 229 static  periph_oninv_t  cdoninvalidate;
 230 static  void            cdasync(void *callback_arg, u_int32_t code,
 231                                 struct cam_path *path, void *arg);
 232 static  int             cdcmdsizesysctl(SYSCTL_HANDLER_ARGS);
 233 static  void            cdshorttimeout(void *arg);
 234 static  void            cdschedule(struct cam_periph *periph, int priority);
 235 static  void            cdrunchangerqueue(void *arg);
 236 static  void            cdchangerschedule(struct cd_softc *softc);
 237 static  int             cdrunccb(union ccb *ccb,
 238                                  int (*error_routine)(union ccb *ccb,
 239                                                       u_int32_t cam_flags,
 240                                                       u_int32_t sense_flags),
 241                                  u_int32_t cam_flags, u_int32_t sense_flags);
 242 static  union ccb       *cdgetccb(struct cam_periph *periph,
 243                                   u_int32_t priority);
 244 static  void            cddone(struct cam_periph *periph,
 245                                union ccb *start_ccb);
 246 static  union cd_pages  *cdgetpage(struct cd_mode_params *mode_params);
 247 static  int             cdgetpagesize(int page_num);
 248 static  void            cdprevent(struct cam_periph *periph, int action);
 249 static  int             cdcheckmedia(struct cam_periph *periph);
 250 static  int             cdsize(struct cam_periph *periph, u_int32_t *size);
 251 static  int             cd6byteworkaround(union ccb *ccb);
 252 static  int             cderror(union ccb *ccb, u_int32_t cam_flags,
 253                                 u_int32_t sense_flags);
 254 static  int             cdreadtoc(struct cam_periph *periph, u_int32_t mode,
 255                                   u_int32_t start, u_int8_t *data,
 256                                   u_int32_t len, u_int32_t sense_flags);
 257 static  int             cdgetmode(struct cam_periph *periph,
 258                                   struct cd_mode_params *data, u_int32_t page);
 259 static  int             cdsetmode(struct cam_periph *periph,
 260                                   struct cd_mode_params *data);
 261 static  int             cdplay(struct cam_periph *periph, u_int32_t blk,
 262                                u_int32_t len);
 263 static  int             cdreadsubchannel(struct cam_periph *periph,
 264                                          u_int32_t mode, u_int32_t format,
 265                                          int track,
 266                                          struct cd_sub_channel_info *data,
 267                                          u_int32_t len);
 268 static  int             cdplaymsf(struct cam_periph *periph, u_int32_t startm,
 269                                   u_int32_t starts, u_int32_t startf,
 270                                   u_int32_t endm, u_int32_t ends,
 271                                   u_int32_t endf);
 272 static  int             cdplaytracks(struct cam_periph *periph,
 273                                      u_int32_t strack, u_int32_t sindex,
 274                                      u_int32_t etrack, u_int32_t eindex);
 275 static  int             cdpause(struct cam_periph *periph, u_int32_t go);
 276 static  int             cdstopunit(struct cam_periph *periph, u_int32_t eject);
 277 static  int             cdstartunit(struct cam_periph *periph, int load);
 278 static  int             cdsetspeed(struct cam_periph *periph,
 279                                    u_int32_t rdspeed, u_int32_t wrspeed);
 280 static  int             cdreportkey(struct cam_periph *periph,
 281                                     struct dvd_authinfo *authinfo);
 282 static  int             cdsendkey(struct cam_periph *periph,
 283                                   struct dvd_authinfo *authinfo);
 284 static  int             cdreaddvdstructure(struct cam_periph *periph,
 285                                            struct dvd_struct *dvdstruct);
 286
 287 static struct periph_driver cddriver =
 288 {
 289         cdinit, "cd",
 290         TAILQ_HEAD_INITIALIZER(cddriver.units), /* generation */ 0
 291 };
 292
 293 PERIPHDRIVER_DECLARE(cd, cddriver);
 294
 295 #ifndef CD_DEFAULT_RETRY
 296 #define CD_DEFAULT_RETRY        4
 297 #endif
 298 #ifndef CHANGER_MIN_BUSY_SECONDS
 299 #define CHANGER_MIN_BUSY_SECONDS        5
 300 #endif
 301 #ifndef CHANGER_MAX_BUSY_SECONDS
 302 #define CHANGER_MAX_BUSY_SECONDS        15
 303 #endif
 304
 305 static int cd_retry_count = CD_DEFAULT_RETRY;
 306 static int changer_min_busy_seconds = CHANGER_MIN_BUSY_SECONDS;
 307 static int changer_max_busy_seconds = CHANGER_MAX_BUSY_SECONDS;
 308
 309 static SYSCTL_NODE(_kern_cam, OID_AUTO, cd, CTLFLAG_RD, 0, "CAM CDROM driver");
 310 static SYSCTL_NODE(_kern_cam_cd, OID_AUTO, changer, CTLFLAG_RD, 0,
 311     "CD Changer");
 312 SYSCTL_INT(_kern_cam_cd, OID_AUTO, retry_count, CTLFLAG_RW,
 313            &cd_retry_count, 0, "Normal I/O retry count");
 314 TUNABLE_INT("kern.cam.cd.retry_count", &cd_retry_count);
 315 SYSCTL_INT(_kern_cam_cd_changer, OID_AUTO, min_busy_seconds, CTLFLAG_RW,
 316            &changer_min_busy_seconds, 0, "Minimum changer scheduling quantum");
 317 TUNABLE_INT("kern.cam.cd.changer.min_busy_seconds", &changer_min_busy_seconds);
 318 SYSCTL_INT(_kern_cam_cd_changer, OID_AUTO, max_busy_seconds, CTLFLAG_RW,
 319            &changer_max_busy_seconds, 0, "Maximum changer scheduling quantum");
 320 TUNABLE_INT("kern.cam.cd.changer.max_busy_seconds", &changer_max_busy_seconds);
 321
 322 struct cdchanger {
 323         path_id_t                        path_id;
 324         target_id_t                      target_id;
 325         int                              num_devices;
 326         struct camq                      devq;
 327         struct timeval                   start_time;
 328         struct cd_softc                  *cur_device;
 329         struct callout                   short_handle;
 330         struct callout                   long_handle;
 331         volatile cd_changer_flags        flags;
 332         STAILQ_ENTRY(cdchanger)          changer_links;
 333         STAILQ_HEAD(chdevlist, cd_softc) chluns;
 334 };
 335
 336 static struct mtx changerq_mtx;
 337 static STAILQ_HEAD(changerlist, cdchanger) changerq;
 338 static int num_changers;
 339
 340 static MALLOC_DEFINE(M_SCSICD, "scsi_cd", "scsi_cd buffers");
 341
 342 static void
 343 cdinit(void)
 344 {
 345         cam_status status;
 346
 347         mtx_init(&changerq_mtx, "cdchangerq", "SCSI CD Changer List", MTX_DEF);
 348         STAILQ_INIT(&changerq);
 349
 350         /*
 351          * Install a global async callback.  This callback will
 352          * receive async callbacks like "new device found".
 353          */
 354         status = xpt_register_async(AC_FOUND_DEVICE, cdasync, NULL, NULL);
 355
 356         if (status != CAM_REQ_CMP) {
 357                 printf("cd: Failed to attach master async callback "
 358                        "due to status 0x%x!\n", status);
 359         }
 360 }
 361
 362 static void
 363 cdoninvalidate(struct cam_periph *periph)
 364 {
 365         struct cd_softc *softc;
 366
 367         softc = (struct cd_softc *)periph->softc;
 368
 369         /*
 370          * De-register any async callbacks.
 371          */
 372         xpt_register_async(0, cdasync, periph, periph->path);
 373
 374         softc->flags |= CD_FLAG_INVALID;
 375
 376         /*
 377          * Return all queued I/O with ENXIO.
 378          * XXX Handle any transactions queued to the card
 379          *     with XPT_ABORT_CCB.
 380          */
 381         bioq_flush(&softc->bio_queue, NULL, ENXIO);
 382
 383         /*
 384          * If this device is part of a changer, and it was scheduled
 385          * to run, remove it from the run queue since we just nuked
 386          * all of its scheduled I/O.
 387          */
 388         if ((softc->flags & CD_FLAG_CHANGER)
 389          && (softc->pinfo.index != CAM_UNQUEUED_INDEX))
 390                 camq_remove(&softc->changer->devq, softc->pinfo.index);
 391
 392         disk_gone(softc->disk);
 393         xpt_print(periph->path, "lost device\n");
 394 }
 395
 396 static void
 397 cdcleanup(struct cam_periph *periph)
 398 {
 399         struct cd_softc *softc;
 400
 401         softc = (struct cd_softc *)periph->softc;
 402
 403         xpt_print(periph->path, "removing device entry\n");
 404
 405         /*
 406          * In the queued, non-active case, the device in question
 407          * has already been removed from the changer run queue.  Since this
 408          * device is active, we need to de-activate it, and schedule
 409          * another device to run.  (if there is another one to run)
 410          */
 411         if ((softc->flags & CD_FLAG_CHANGER)
 412          && (softc->flags & CD_FLAG_ACTIVE)) {
 413
 414                 /*
 415                  * The purpose of the short timeout is soley to determine
 416                  * whether the current device has finished or not.  Well,
 417                  * since we're removing the active device, we know that it
 418                  * is finished.  So, get rid of the short timeout.
 419                  * Otherwise, if we're in the time period before the short
 420                  * timeout fires, and there are no other devices in the
 421                  * queue to run, there won't be any other device put in the
 422                  * active slot.  i.e., when we call cdrunchangerqueue()
 423                  * below, it won't do anything.  Then, when the short
 424                  * timeout fires, it'll look at the "current device", which
 425                  * we are free below, and possibly panic the kernel on a
 426                  * bogus pointer reference.
 427                  *
 428                  * The long timeout doesn't really matter, since we
 429                  * decrement the qfrozen_cnt to indicate that there is
 430                  * nothing in the active slot now.  Therefore, there won't
 431                  * be any bogus pointer references there.
 432                  */
 433                 if (softc->changer->flags & CHANGER_SHORT_TMOUT_SCHED) {
 434                         callout_stop(&softc->changer->short_handle);
 435                         softc->changer->flags &= ~CHANGER_SHORT_TMOUT_SCHED;
 436                 }
 437                 softc->changer->devq.qfrozen_cnt[0]--;
 438                 softc->changer->flags |= CHANGER_MANUAL_CALL;
 439                 cdrunchangerqueue(softc->changer);
 440         }
 441
 442         /*
 443          * If we're removing the last device on the changer, go ahead and
 444          * remove the changer device structure.
 445          */
 446         if ((softc->flags & CD_FLAG_CHANGER)
 447          && (--softc->changer->num_devices == 0)) {
 448
 449                 /*
 450                  * Theoretically, there shouldn't be any timeouts left, but
 451                  * I'm not completely sure that that will be the case.  So,
 452                  * it won't hurt to check and see if there are any left.
 453                  */
 454                 if (softc->changer->flags & CHANGER_TIMEOUT_SCHED) {
 455                         callout_stop(&softc->changer->long_handle);
 456                         softc->changer->flags &= ~CHANGER_TIMEOUT_SCHED;
 457                 }
 458
 459                 if (softc->changer->flags & CHANGER_SHORT_TMOUT_SCHED) {
 460                         callout_stop(&softc->changer->short_handle);
 461                         softc->changer->flags &= ~CHANGER_SHORT_TMOUT_SCHED;
 462                 }
 463
 464                 mtx_lock(&changerq_mtx);
 465                 STAILQ_REMOVE(&changerq, softc->changer, cdchanger,
 466                               changer_links);
 467                 num_changers--;
 468                 mtx_unlock(&changerq_mtx);
 469                 xpt_print(periph->path, "removing changer entry\n");
 470                 free(softc->changer, M_DEVBUF);
 471         }
 472         cam_periph_unlock(periph);
 473         if ((softc->flags & CD_FLAG_SCTX_INIT) != 0
 474             && sysctl_ctx_free(&softc->sysctl_ctx) != 0) {
 475                 xpt_print(periph->path, "can't remove sysctl context\n");
 476         }
 477
 478         disk_destroy(softc->disk);
 479         free(softc, M_DEVBUF);
 480         cam_periph_lock(periph);
 481 }
 482
 483 static void
 484 cdasync(void *callback_arg, u_int32_t code,
 485         struct cam_path *path, void *arg)
 486 {
 487         struct cam_periph *periph;
 488
 489         periph = (struct cam_periph *)callback_arg;
 490         switch (code) {
 491         case AC_FOUND_DEVICE:
 492         {
 493                 struct ccb_getdev *cgd;
 494                 cam_status status;
 495
 496                 cgd = (struct ccb_getdev *)arg;
 497                 if (cgd == NULL)
 498                         break;
 499
 500                 if (cgd->protocol != PROTO_SCSI)
 501                         break;
 502
 503                 if (SID_TYPE(&cgd->inq_data) != T_CDROM
 504                     && SID_TYPE(&cgd->inq_data) != T_WORM)
 505                         break;
 506
 507                 /*
 508                  * Allocate a peripheral instance for
 509                  * this device and start the probe
 510                  * process.
 511                  */
 512                 status = cam_periph_alloc(cdregister, cdoninvalidate,
 513                                           cdcleanup, cdstart,
 514                                           "cd", CAM_PERIPH_BIO,
 515                                           cgd->ccb_h.path, cdasync,
 516                                           AC_FOUND_DEVICE, cgd);
 517
 518                 if (status != CAM_REQ_CMP
 519                  && status != CAM_REQ_INPROG)
 520                         printf("cdasync: Unable to attach new device "
 521                                "due to status 0x%x\n", status);
 522
 523                 break;
 524         }
 525         case AC_SENT_BDR:
 526         case AC_BUS_RESET:
 527         {
 528                 struct cd_softc *softc;
 529                 struct ccb_hdr *ccbh;
 530
 531                 softc = (struct cd_softc *)periph->softc;
 532                 /*
 533                  * Don't fail on the expected unit attention
 534                  * that will occur.
 535                  */
 536                 softc->flags |= CD_FLAG_RETRY_UA;
 537                 LIST_FOREACH(ccbh, &softc->pending_ccbs, periph_links.le)
 538                         ccbh->ccb_state |= CD_CCB_RETRY_UA;
 539                 /* FALLTHROUGH */
 540         }
 541         default:
 542                 cam_periph_async(periph, code, path, arg);
 543                 break;
 544         }
 545 }
 546
 547 static void
 548 cdsysctlinit(void *context, int pending)
 549 {
 550         struct cam_periph *periph;
 551         struct cd_softc *softc;
 552         char tmpstr[80], tmpstr2[80];
 553
 554         periph = (struct cam_periph *)context;
 555         if (cam_periph_acquire(periph) != CAM_REQ_CMP)
 556                 return;
 557
 558         softc = (struct cd_softc *)periph->softc;
 559         snprintf(tmpstr, sizeof(tmpstr), "CAM CD unit %d", periph->unit_number);
 560         snprintf(tmpstr2, sizeof(tmpstr2), "%d", periph->unit_number);
 561
 562         sysctl_ctx_init(&softc->sysctl_ctx);
 563         softc->flags |= CD_FLAG_SCTX_INIT;
 564         softc->sysctl_tree = SYSCTL_ADD_NODE(&softc->sysctl_ctx,
 565                 SYSCTL_STATIC_CHILDREN(_kern_cam_cd), OID_AUTO,
 566                 tmpstr2, CTLFLAG_RD, 0, tmpstr);
 567
 568         if (softc->sysctl_tree == NULL) {
 569                 printf("cdsysctlinit: unable to allocate sysctl tree\n");
 570                 cam_periph_release(periph);
 571                 return;
 572         }
 573
 574         /*
 575          * Now register the sysctl handler, so the user can the value on
 576          * the fly.
 577          */
 578         SYSCTL_ADD_PROC(&softc->sysctl_ctx,SYSCTL_CHILDREN(softc->sysctl_tree),
 579                 OID_AUTO, "minimum_cmd_size", CTLTYPE_INT | CTLFLAG_RW,
 580                 &softc->minimum_command_size, 0, cdcmdsizesysctl, "I",
 581                 "Minimum CDB size");
 582
 583         cam_periph_release(periph);
 584 }
 585
 586 /*
 587  * We have a handler function for this so we can check the values when the
 588  * user sets them, instead of every time we look at them.
 589  */
 590 static int
 591 cdcmdsizesysctl(SYSCTL_HANDLER_ARGS)
 592 {
 593         int error, value;
 594
 595         value = *(int *)arg1;
 596
 597         error = sysctl_handle_int(oidp, &value, 0, req);
 598
 599         if ((error != 0)
 600          || (req->newptr == NULL))
 601                 return (error);
 602
 603         /*
 604          * The only real values we can have here are 6 or 10.  I don't
 605          * really forsee having 12 be an option at any time in the future.
 606          * So if the user sets something less than or equal to 6, we'll set
 607          * it to 6.  If he sets something greater than 6, we'll set it to 10.
 608          *
 609          * I suppose we could just return an error here for the wrong values,
 610          * but I don't think it's necessary to do so, as long as we can
 611          * determine the user's intent without too much trouble.
 612          */
 613         if (value < 6)
 614                 value = 6;
 615         else if (value > 6)
 616                 value = 10;
 617
 618         *(int *)arg1 = value;
 619
 620         return (0);
 621 }
 622
 623 static cam_status
 624 cdregister(struct cam_periph *periph, void *arg)
 625 {
 626         struct cd_softc *softc;
 627         struct ccb_pathinq cpi;
 628         struct ccb_getdev *cgd;
 629         char tmpstr[80];
 630         caddr_t match;
 631
 632         cgd = (struct ccb_getdev *)arg;
 633         if (periph == NULL) {
 634                 printf("cdregister: periph was NULL!!\n");
 635                 return(CAM_REQ_CMP_ERR);
 636         }
 637         if (cgd == NULL) {
 638                 printf("cdregister: no getdev CCB, can't register device\n");
 639                 return(CAM_REQ_CMP_ERR);
 640         }
 641
 642         softc = (struct cd_softc *)malloc(sizeof(*softc),M_DEVBUF,
 643             M_NOWAIT | M_ZERO);
 644         if (softc == NULL) {
 645                 printf("cdregister: Unable to probe new device. "
 646                        "Unable to allocate softc\n");
 647                 return(CAM_REQ_CMP_ERR);
 648         }
 649
 650         LIST_INIT(&softc->pending_ccbs);
 651         STAILQ_INIT(&softc->mode_queue);
 652         softc->state = CD_STATE_PROBE;
 653         bioq_init(&softc->bio_queue);
 654         if (SID_IS_REMOVABLE(&cgd->inq_data))
 655                 softc->flags |= CD_FLAG_DISC_REMOVABLE;
 656         if ((cgd->inq_data.flags & SID_CmdQue) != 0)
 657                 softc->flags |= CD_FLAG_TAGGED_QUEUING;
 658
 659         periph->softc = softc;
 660         softc->periph = periph;
 661
 662         /*
 663          * See if this device has any quirks.
 664          */
 665         match = cam_quirkmatch((caddr_t)&cgd->inq_data,
 666                                (caddr_t)cd_quirk_table,
 667                                sizeof(cd_quirk_table)/sizeof(*cd_quirk_table),
 668                                sizeof(*cd_quirk_table), scsi_inquiry_match);
 669
 670         if (match != NULL)
 671                 softc->quirks = ((struct cd_quirk_entry *)match)->quirks;
 672         else
 673                 softc->quirks = CD_Q_NONE;
 674
 675         /* Check if the SIM does not want 6 byte commands */
 676         bzero(&cpi, sizeof(cpi));
 677         xpt_setup_ccb(&cpi.ccb_h, periph->path, CAM_PRIORITY_NORMAL);
 678         cpi.ccb_h.func_code = XPT_PATH_INQ;
 679         xpt_action((union ccb *)&cpi);
 680         if (cpi.ccb_h.status == CAM_REQ_CMP && (cpi.hba_misc & PIM_NO_6_BYTE))
 681                 softc->quirks |= CD_Q_10_BYTE_ONLY;
 682
 683         TASK_INIT(&softc->sysctl_task, 0, cdsysctlinit, periph);
 684
 685         /* The default is 6 byte commands, unless quirked otherwise */
 686         if (softc->quirks & CD_Q_10_BYTE_ONLY)
 687                 softc->minimum_command_size = 10;
 688         else
 689                 softc->minimum_command_size = 6;
 690
 691         /*
 692          * Refcount and block open attempts until we are setup
 693          * Can't block
 694          */
 695         (void)cam_periph_hold(periph, PRIBIO);
 696         cam_periph_unlock(periph);
 697         /*
 698          * Load the user's default, if any.
 699          */
 700         snprintf(tmpstr, sizeof(tmpstr), "kern.cam.cd.%d.minimum_cmd_size",
 701                  periph->unit_number);
 702         TUNABLE_INT_FETCH(tmpstr, &softc->minimum_command_size);
 703
 704         /* 6 and 10 are the only permissible values here. */
 705         if (softc->minimum_command_size < 6)
 706                 softc->minimum_command_size = 6;
 707         else if (softc->minimum_command_size > 6)
 708                 softc->minimum_command_size = 10;
 709
 710         /*
 711          * We need to register the statistics structure for this device,
 712          * but we don't have the blocksize yet for it.  So, we register
 713          * the structure and indicate that we don't have the blocksize
 714          * yet.  Unlike other SCSI peripheral drivers, we explicitly set
 715          * the device type here to be CDROM, rather than just ORing in
 716          * the device type.  This is because this driver can attach to either
 717          * CDROM or WORM devices, and we want this peripheral driver to
 718          * show up in the devstat list as a CD peripheral driver, not a
 719          * WORM peripheral driver.  WORM drives will also have the WORM
 720          * driver attached to them.
 721          */
 722         softc->disk = disk_alloc();
 723         softc->disk->d_devstat = devstat_new_entry("cd",
 724                           periph->unit_number, 0,
 725                           DEVSTAT_BS_UNAVAILABLE,
 726                           DEVSTAT_TYPE_CDROM |
 727                           XPORT_DEVSTAT_TYPE(cpi.transport),
 728                           DEVSTAT_PRIORITY_CD);
 729         softc->disk->d_open = cdopen;
 730         softc->disk->d_close = cdclose;
 731         softc->disk->d_strategy = cdstrategy;
 732         softc->disk->d_ioctl = cdioctl;
 733         softc->disk->d_name = "cd";
 734         cam_strvis(softc->disk->d_descr, cgd->inq_data.vendor,
 735             sizeof(cgd->inq_data.vendor), sizeof(softc->disk->d_descr));
 736         strlcat(softc->disk->d_descr, " ", sizeof(softc->disk->d_descr));
 737         cam_strvis(&softc->disk->d_descr[strlen(softc->disk->d_descr)],
 738             cgd->inq_data.product, sizeof(cgd->inq_data.product),
 739             sizeof(softc->disk->d_descr) - strlen(softc->disk->d_descr));
 740         softc->disk->d_unit = periph->unit_number;
 741         softc->disk->d_drv1 = periph;
 742         if (cpi.maxio == 0)
 743                 softc->disk->d_maxsize = DFLTPHYS;      /* traditional default */
 744         else if (cpi.maxio > MAXPHYS)
 745                 softc->disk->d_maxsize = MAXPHYS;       /* for safety */
 746         else
 747                 softc->disk->d_maxsize = cpi.maxio;
 748         softc->disk->d_flags = 0;
 749         softc->disk->d_hba_vendor = cpi.hba_vendor;
 750         softc->disk->d_hba_device = cpi.hba_device;
 751         softc->disk->d_hba_subvendor = cpi.hba_subvendor;
 752         softc->disk->d_hba_subdevice = cpi.hba_subdevice;
 753         disk_create(softc->disk, DISK_VERSION);
 754         cam_periph_lock(periph);
 755
 756         /*
 757          * Add an async callback so that we get
 758          * notified if this device goes away.
 759          */
 760         xpt_register_async(AC_SENT_BDR | AC_BUS_RESET | AC_LOST_DEVICE,
 761                            cdasync, periph, periph->path);
 762
 763         /*
 764          * If the target lun is greater than 0, we most likely have a CD
 765          * changer device.  Check the quirk entries as well, though, just
 766          * in case someone has a CD tower with one lun per drive or
 767          * something like that.  Also, if we know up front that a
 768          * particular device is a changer, we can mark it as such starting
 769          * with lun 0, instead of lun 1.  It shouldn't be necessary to have
 770          * a quirk entry to define something as a changer, however.
 771          */
 772         if (((cgd->ccb_h.target_lun > 0)
 773           && ((softc->quirks & CD_Q_NO_CHANGER) == 0))
 774          || ((softc->quirks & CD_Q_CHANGER) != 0)) {
 775                 struct cdchanger *nchanger;
 776                 struct cam_periph *nperiph;
 777                 struct cam_path *path;
 778                 cam_status status;
 779                 int found;
 780
 781                 /* Set the changer flag in the current device's softc */
 782                 softc->flags |= CD_FLAG_CHANGER;
 783
 784                 /*
 785                  * Now, look around for an existing changer device with the
 786                  * same path and target ID as the current device.
 787                  */
 788                 mtx_lock(&changerq_mtx);
 789                 for (found = 0,
 790                      nchanger = (struct cdchanger *)STAILQ_FIRST(&changerq);
 791                      nchanger != NULL;
 792                      nchanger = STAILQ_NEXT(nchanger, changer_links)){
 793                         if ((nchanger->path_id == cgd->ccb_h.path_id)
 794                          && (nchanger->target_id == cgd->ccb_h.target_id)) {
 795                                 found = 1;
 796                                 break;
 797                         }
 798                 }
 799                 mtx_unlock(&changerq_mtx);
 800
 801                 /*
 802                  * If we found a matching entry, just add this device to
 803                  * the list of devices on this changer.
 804                  */
 805                 if (found == 1) {
 806                         struct chdevlist *chlunhead;
 807
 808                         chlunhead = &nchanger->chluns;
 809
 810                         /*
 811                          * XXX KDM look at consolidating this code with the
 812                          * code below in a separate function.
 813                          */
 814
 815                         /*
 816                          * Create a path with lun id 0, and see if we can
 817                          * find a matching device
 818                          */
 819                         status = xpt_create_path(&path, /*periph*/ periph,
 820                                                  cgd->ccb_h.path_id,
 821                                                  cgd->ccb_h.target_id, 0);
 822
 823                         if ((status == CAM_REQ_CMP)
 824                          && ((nperiph = cam_periph_find(path, "cd")) != NULL)){
 825                                 struct cd_softc *nsoftc;
 826
 827                                 nsoftc = (struct cd_softc *)nperiph->softc;
 828
 829                                 if ((nsoftc->flags & CD_FLAG_CHANGER) == 0){
 830                                         nsoftc->flags |= CD_FLAG_CHANGER;
 831                                         nchanger->num_devices++;
 832                                         if (camq_resize(&nchanger->devq,
 833                                            nchanger->num_devices)!=CAM_REQ_CMP){
 834                                                 printf("cdregister: "
 835                                                        "camq_resize "
 836                                                        "failed, changer "
 837                                                        "support may "
 838                                                        "be messed up\n");
 839                                         }
 840                                         nsoftc->changer = nchanger;
 841                                         nsoftc->pinfo.index =CAM_UNQUEUED_INDEX;
 842
 843                                         STAILQ_INSERT_TAIL(&nchanger->chluns,
 844                                                           nsoftc,changer_links);
 845                                 }
 846                                 xpt_free_path(path);
 847                         } else if (status == CAM_REQ_CMP)
 848                                 xpt_free_path(path);
 849                         else {
 850                                 printf("cdregister: unable to allocate path\n"
 851                                        "cdregister: changer support may be "
 852                                        "broken\n");
 853                         }
 854
 855                         nchanger->num_devices++;
 856
 857                         softc->changer = nchanger;
 858                         softc->pinfo.index = CAM_UNQUEUED_INDEX;
 859
 860                         if (camq_resize(&nchanger->devq,
 861                             nchanger->num_devices) != CAM_REQ_CMP) {
 862                                 printf("cdregister: camq_resize "
 863                                        "failed, changer support may "
 864                                        "be messed up\n");
 865                         }
 866
 867                         STAILQ_INSERT_TAIL(chlunhead, softc, changer_links);
 868                 }
 869                 /*
 870                  * In this case, we don't already have an entry for this
 871                  * particular changer, so we need to create one, add it to
 872                  * the queue, and queue this device on the list for this
 873                  * changer.  Before we queue this device, however, we need
 874                  * to search for lun id 0 on this target, and add it to the
 875                  * queue first, if it exists.  (and if it hasn't already
 876                  * been marked as part of the changer.)
 877                  */
 878                 else {
 879                         nchanger = malloc(sizeof(struct cdchanger),
 880                                 M_DEVBUF, M_NOWAIT | M_ZERO);
 881                         if (nchanger == NULL) {
 882                                 softc->flags &= ~CD_FLAG_CHANGER;
 883                                 printf("cdregister: unable to malloc "
 884                                        "changer structure\ncdregister: "
 885                                        "changer support disabled\n");
 886
 887                                 /*
 888                                  * Yes, gotos can be gross but in this case
 889                                  * I think it's justified..
 890                                  */
 891                                 goto cdregisterexit;
 892                         }
 893                         if (camq_init(&nchanger->devq, 1) != 0) {
 894                                 softc->flags &= ~CD_FLAG_CHANGER;
 895                                 printf("cdregister: changer support "
 896                                        "disabled\n");
 897                                 goto cdregisterexit;
 898                         }
 899
 900                         nchanger->path_id = cgd->ccb_h.path_id;
 901                         nchanger->target_id = cgd->ccb_h.target_id;
 902
 903                         /* this is superfluous, but it makes things clearer */
 904                         nchanger->num_devices = 0;
 905
 906                         STAILQ_INIT(&nchanger->chluns);
 907
 908                         callout_init_mtx(&nchanger->long_handle,
 909                             periph->sim->mtx, 0);
 910                         callout_init_mtx(&nchanger->short_handle,
 911                             periph->sim->mtx, 0);
 912
 913                         mtx_lock(&changerq_mtx);
 914                         num_changers++;
 915                         STAILQ_INSERT_TAIL(&changerq, nchanger,
 916                                            changer_links);
 917                         mtx_unlock(&changerq_mtx);
 918
 919                         /*
 920                          * Create a path with lun id 0, and see if we can
 921                          * find a matching device
 922                          */
 923                         status = xpt_create_path(&path, /*periph*/ periph,
 924                                                  cgd->ccb_h.path_id,
 925                                                  cgd->ccb_h.target_id, 0);
 926
 927                         /*
 928                          * If we were able to allocate the path, and if we
 929                          * find a matching device and it isn't already
 930                          * marked as part of a changer, then we add it to
 931                          * the current changer.
 932                          */
 933                         if ((status == CAM_REQ_CMP)
 934                          && ((nperiph = cam_periph_find(path, "cd")) != NULL)
 935                          && ((((struct cd_softc *)periph->softc)->flags &
 936                                CD_FLAG_CHANGER) == 0)) {
 937                                 struct cd_softc *nsoftc;
 938
 939                                 nsoftc = (struct cd_softc *)nperiph->softc;
 940
 941                                 nsoftc->flags |= CD_FLAG_CHANGER;
 942                                 nchanger->num_devices++;
 943                                 if (camq_resize(&nchanger->devq,
 944                                     nchanger->num_devices) != CAM_REQ_CMP) {
 945                                         printf("cdregister: camq_resize "
 946                                                "failed, changer support may "
 947                                                "be messed up\n");
 948                                 }
 949                                 nsoftc->changer = nchanger;
 950                                 nsoftc->pinfo.index = CAM_UNQUEUED_INDEX;
 951
 952                                 STAILQ_INSERT_TAIL(&nchanger->chluns,
 953                                                    nsoftc, changer_links);
 954                                 xpt_free_path(path);
 955                         } else if (status == CAM_REQ_CMP)
 956                                 xpt_free_path(path);
 957                         else {
 958                                 printf("cdregister: unable to allocate path\n"
 959                                        "cdregister: changer support may be "
 960                                        "broken\n");
 961                         }
 962
 963                         softc->changer = nchanger;
 964                         softc->pinfo.index = CAM_UNQUEUED_INDEX;
 965                         nchanger->num_devices++;
 966                         if (camq_resize(&nchanger->devq,
 967                             nchanger->num_devices) != CAM_REQ_CMP) {
 968                                 printf("cdregister: camq_resize "
 969                                        "failed, changer support may "
 970                                        "be messed up\n");
 971                         }
 972                         STAILQ_INSERT_TAIL(&nchanger->chluns, softc,
 973                                            changer_links);
 974                 }
 975         }
 976
 977 cdregisterexit:
 978
 979         if ((softc->flags & CD_FLAG_CHANGER) == 0)
 980                 xpt_schedule(periph, CAM_PRIORITY_DEV);
 981         else
 982                 cdschedule(periph, CAM_PRIORITY_DEV);
 983
 984         return(CAM_REQ_CMP);
 985 }
 986
 987 static int
 988 cdopen(struct disk *dp)
 989 {
 990         struct cam_periph *periph;
 991         struct cd_softc *softc;
 992         int error;
 993
 994         periph = (struct cam_periph *)dp->d_drv1;
 995         if (periph == NULL)
 996                 return (ENXIO);
 997
 998         softc = (struct cd_softc *)periph->softc;
 999
1000         if (cam_periph_acquire(periph) != CAM_REQ_CMP)
1001                 return(ENXIO);
1002
1003         cam_periph_lock(periph);
1004
1005         if (softc->flags & CD_FLAG_INVALID) {
1006                 cam_periph_unlock(periph);
1007                 cam_periph_release(periph);
1008                 return(ENXIO);
1009         }
1010
1011         if ((error = cam_periph_hold(periph, PRIBIO | PCATCH)) != 0) {
1012                 cam_periph_unlock(periph);
1013                 cam_periph_release(periph);
1014                 return (error);
1015         }
1016
1017         /*
1018          * Check for media, and set the appropriate flags.  We don't bail
1019          * if we don't have media, but then we don't allow anything but the
1020          * CDIOCEJECT/CDIOCCLOSE ioctls if there is no media.
1021          */
1022         cdcheckmedia(periph);
1023
1024         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("leaving cdopen\n"));
1025         cam_periph_unhold(periph);
1026
1027         /* Closes aren't symmetrical with opens, so fix up the refcounting. */
1028         if ((softc->flags & CD_FLAG_OPEN) == 0) {
1029                 softc->flags |= CD_FLAG_OPEN;
1030                 cam_periph_unlock(periph);
1031         } else {
1032                 cam_periph_unlock(periph);
1033                 cam_periph_release(periph);
1034         }
1035
1036         return (0);
1037 }
1038
1039 static int
1040 cdclose(struct disk *dp)
1041 {
1042         struct  cam_periph *periph;
1043         struct  cd_softc *softc;
1044
1045         periph = (struct cam_periph *)dp->d_drv1;
1046         if (periph == NULL)
1047                 return (ENXIO);
1048
1049         softc = (struct cd_softc *)periph->softc;
1050
1051         cam_periph_lock(periph);
1052         cam_periph_hold(periph, PRIBIO);
1053
1054         if ((softc->flags & CD_FLAG_DISC_REMOVABLE) != 0)
1055                 cdprevent(periph, PR_ALLOW);
1056
1057         /*
1058          * Since we're closing this CD, mark the blocksize as unavailable.
1059          * It will be marked as available when the CD is opened again.
1060          */
1061         softc->disk->d_devstat->flags |= DEVSTAT_BS_UNAVAILABLE;
1062
1063         /*
1064          * We'll check the media and toc again at the next open().
1065          */
1066         softc->flags &= ~(CD_FLAG_VALID_MEDIA|CD_FLAG_VALID_TOC|CD_FLAG_OPEN);
1067
1068         cam_periph_unhold(periph);
1069         cam_periph_unlock(periph);
1070         cam_periph_release(periph);
1071
1072         return (0);
1073 }
1074
1075 static void
1076 cdshorttimeout(void *arg)
1077 {
1078         struct cdchanger *changer;
1079
1080         changer = (struct cdchanger *)arg;
1081
1082         /* Always clear the short timeout flag, since that's what we're in */
1083         changer->flags &= ~CHANGER_SHORT_TMOUT_SCHED;
1084
1085         /*
1086          * Check to see if there is any more pending or outstanding I/O for
1087          * this device.  If not, move it out of the active slot.
1088          */
1089         if ((bioq_first(&changer->cur_device->bio_queue) == NULL)
1090          && (changer->cur_device->outstanding_cmds == 0)) {
1091                 changer->flags |= CHANGER_MANUAL_CALL;
1092                 cdrunchangerqueue(changer);
1093         }
1094 }
1095
1096 /*
1097  * This is a wrapper for xpt_schedule.  It only applies to changers.
1098  */
1099 static void
1100 cdschedule(struct cam_periph *periph, int priority)
1101 {
1102         struct cd_softc *softc;
1103
1104         softc = (struct cd_softc *)periph->softc;
1105
1106         /*
1107          * If this device isn't currently queued, and if it isn't
1108          * the active device, then we queue this device and run the
1109          * changer queue if there is no timeout scheduled to do it.
1110          * If this device is the active device, just schedule it
1111          * to run again.  If this device is queued, there should be
1112          * a timeout in place already that will make sure it runs.
1113          */
1114         if ((softc->pinfo.index == CAM_UNQUEUED_INDEX)
1115          && ((softc->flags & CD_FLAG_ACTIVE) == 0)) {
1116                 /*
1117                  * We don't do anything with the priority here.
1118                  * This is strictly a fifo queue.
1119                  */
1120                 softc->pinfo.priority = CAM_PRIORITY_NORMAL;
1121                 softc->pinfo.generation = ++softc->changer->devq.generation;
1122                 camq_insert(&softc->changer->devq, (cam_pinfo *)softc);
1123
1124                 /*
1125                  * Since we just put a device in the changer queue,
1126                  * check and see if there is a timeout scheduled for
1127                  * this changer.  If so, let the timeout handle
1128                  * switching this device into the active slot.  If
1129                  * not, manually call the timeout routine to
1130                  * bootstrap things.
1131                  */
1132                 if (((softc->changer->flags & CHANGER_TIMEOUT_SCHED)==0)
1133                  && ((softc->changer->flags & CHANGER_NEED_TIMEOUT)==0)
1134                  && ((softc->changer->flags & CHANGER_SHORT_TMOUT_SCHED)==0)){
1135                         softc->changer->flags |= CHANGER_MANUAL_CALL;
1136                         cdrunchangerqueue(softc->changer);
1137                 }
1138         } else if ((softc->flags & CD_FLAG_ACTIVE)
1139                 && ((softc->flags & CD_FLAG_SCHED_ON_COMP) == 0))
1140                 xpt_schedule(periph, priority);
1141 }
1142
1143 static void
1144 cdrunchangerqueue(void *arg)
1145 {
1146         struct cd_softc *softc;
1147         struct cdchanger *changer;
1148         int called_from_timeout;
1149
1150         changer = (struct cdchanger *)arg;
1151
1152         /*
1153          * If we have NOT been called from cdstrategy() or cddone(), and
1154          * instead from a timeout routine, go ahead and clear the
1155          * timeout flag.
1156          */
1157         if ((changer->flags & CHANGER_MANUAL_CALL) == 0) {
1158                 changer->flags &= ~CHANGER_TIMEOUT_SCHED;
1159                 called_from_timeout = 1;
1160         } else
1161                 called_from_timeout = 0;
1162
1163         /* Always clear the manual call flag */
1164         changer->flags &= ~CHANGER_MANUAL_CALL;
1165
1166         /* nothing to do if the queue is empty */
1167         if (changer->devq.entries <= 0) {
1168                 return;
1169         }
1170
1171         /*
1172          * If the changer queue is frozen, that means we have an active
1173          * device.
1174          */
1175         if (changer->devq.qfrozen_cnt[0] > 0) {
1176
1177                 /*
1178                  * We always need to reset the frozen count and clear the
1179                  * active flag.
1180                  */
1181                 changer->devq.qfrozen_cnt[0]--;
1182                 changer->cur_device->flags &= ~CD_FLAG_ACTIVE;
1183                 changer->cur_device->flags &= ~CD_FLAG_SCHED_ON_COMP;
1184
1185                 if (changer->cur_device->outstanding_cmds > 0) {
1186                         changer->cur_device->flags |= CD_FLAG_SCHED_ON_COMP;
1187                         changer->cur_device->bufs_left =
1188                                 changer->cur_device->outstanding_cmds;
1189                         if (called_from_timeout) {
1190                                 callout_reset(&changer->long_handle,
1191                                     changer_max_busy_seconds * hz,
1192                                     cdrunchangerqueue, changer);
1193                                 changer->flags |= CHANGER_TIMEOUT_SCHED;
1194                         }
1195                         return;
1196                 }
1197
1198                 /*
1199                  * Check to see whether the current device has any I/O left
1200                  * to do.  If so, requeue it at the end of the queue.  If
1201                  * not, there is no need to requeue it.
1202                  */
1203                 if (bioq_first(&changer->cur_device->bio_queue) != NULL) {
1204
1205                         changer->cur_device->pinfo.generation =
1206                                 ++changer->devq.generation;
1207                         camq_insert(&changer->devq,
1208                                 (cam_pinfo *)changer->cur_device);
1209                 }
1210         }
1211
1212         softc = (struct cd_softc *)camq_remove(&changer->devq, CAMQ_HEAD);
1213
1214         changer->cur_device = softc;
1215
1216         changer->devq.qfrozen_cnt[0]++;
1217         softc->flags |= CD_FLAG_ACTIVE;
1218
1219         /* Just in case this device is waiting */
1220         wakeup(&softc->changer);
1221         xpt_schedule(softc->periph, CAM_PRIORITY_NORMAL);
1222
1223         /*
1224          * Get rid of any pending timeouts, and set a flag to schedule new
1225          * ones so this device gets its full time quantum.
1226          */
1227         if (changer->flags & CHANGER_TIMEOUT_SCHED) {
1228                 callout_stop(&changer->long_handle);
1229                 changer->flags &= ~CHANGER_TIMEOUT_SCHED;
1230         }
1231
1232         if (changer->flags & CHANGER_SHORT_TMOUT_SCHED) {
1233                 callout_stop(&changer->short_handle);
1234                 changer->flags &= ~CHANGER_SHORT_TMOUT_SCHED;
1235         }
1236
1237         /*
1238          * We need to schedule timeouts, but we only do this after the
1239          * first transaction has completed.  This eliminates the changer
1240          * switch time.
1241          */
1242         changer->flags |= CHANGER_NEED_TIMEOUT;
1243 }
1244
1245 static void
1246 cdchangerschedule(struct cd_softc *softc)
1247 {
1248         struct cdchanger *changer;
1249
1250         changer = softc->changer;
1251
1252         /*
1253          * If this is a changer, and this is the current device,
1254          * and this device has at least the minimum time quantum to
1255          * run, see if we can switch it out.
1256          */
1257         if ((softc->flags & CD_FLAG_ACTIVE)
1258          && ((changer->flags & CHANGER_SHORT_TMOUT_SCHED) == 0)
1259          && ((changer->flags & CHANGER_NEED_TIMEOUT) == 0)) {
1260                 /*
1261                  * We try three things here.  The first is that we
1262                  * check to see whether the schedule on completion
1263                  * flag is set.  If it is, we decrement the number
1264                  * of buffers left, and if it's zero, we reschedule.
1265                  * Next, we check to see whether the pending buffer
1266                  * queue is empty and whether there are no
1267                  * outstanding transactions.  If so, we reschedule.
1268                  * Next, we see if the pending buffer queue is empty.
1269                  * If it is, we set the number of buffers left to
1270                  * the current active buffer count and set the
1271                  * schedule on complete flag.
1272                  */
1273                 if (softc->flags & CD_FLAG_SCHED_ON_COMP) {
1274                         if (--softc->bufs_left == 0) {
1275                                 softc->changer->flags |=
1276                                         CHANGER_MANUAL_CALL;
1277                                 softc->flags &= ~CD_FLAG_SCHED_ON_COMP;
1278                                 cdrunchangerqueue(softc->changer);
1279                         }
1280                 } else if ((bioq_first(&softc->bio_queue) == NULL)
1281                         && (softc->outstanding_cmds == 0)) {
1282                         softc->changer->flags |= CHANGER_MANUAL_CALL;
1283                         cdrunchangerqueue(softc->changer);
1284                 }
1285         } else if ((softc->changer->flags & CHANGER_NEED_TIMEOUT)
1286                 && (softc->flags & CD_FLAG_ACTIVE)) {
1287
1288                 /*
1289                  * Now that the first transaction to this
1290                  * particular device has completed, we can go ahead
1291                  * and schedule our timeouts.
1292                  */
1293                 if ((changer->flags & CHANGER_TIMEOUT_SCHED) == 0) {
1294                         callout_reset(&changer->long_handle,
1295                             changer_max_busy_seconds * hz,
1296                             cdrunchangerqueue, changer);
1297                         changer->flags |= CHANGER_TIMEOUT_SCHED;
1298                 } else
1299                         printf("cdchangerschedule: already have a long"
1300                                " timeout!\n");
1301
1302                 if ((changer->flags & CHANGER_SHORT_TMOUT_SCHED) == 0) {
1303                         callout_reset(&changer->short_handle,
1304                             changer_min_busy_seconds * hz,
1305                             cdshorttimeout, changer);
1306                         changer->flags |= CHANGER_SHORT_TMOUT_SCHED;
1307                 } else
1308                         printf("cdchangerschedule: already have a short "
1309                                "timeout!\n");
1310
1311                 /*
1312                  * We just scheduled timeouts, no need to schedule
1313                  * more.
1314                  */
1315                 changer->flags &= ~CHANGER_NEED_TIMEOUT;
1316
1317         }
1318 }
1319
1320 static int
1321 cdrunccb(union ccb *ccb, int (*error_routine)(union ccb *ccb,
1322                                               u_int32_t cam_flags,
1323                                               u_int32_t sense_flags),
1324          u_int32_t cam_flags, u_int32_t sense_flags)
1325 {
1326         struct cd_softc *softc;
1327         struct cam_periph *periph;
1328         int error;
1329
1330         periph = xpt_path_periph(ccb->ccb_h.path);
1331         softc = (struct cd_softc *)periph->softc;
1332
1333         error = cam_periph_runccb(ccb, error_routine, cam_flags, sense_flags,
1334                                   softc->disk->d_devstat);
1335
1336         if (softc->flags & CD_FLAG_CHANGER)
1337                 cdchangerschedule(softc);
1338
1339         return(error);
1340 }
1341
1342 static union ccb *
1343 cdgetccb(struct cam_periph *periph, u_int32_t priority)
1344 {
1345         struct cd_softc *softc;
1346
1347         softc = (struct cd_softc *)periph->softc;
1348
1349         if (softc->flags & CD_FLAG_CHANGER) {
1350                 /*
1351                  * This should work the first time this device is woken up,
1352                  * but just in case it doesn't, we use a while loop.
1353                  */
1354                 while ((softc->flags & CD_FLAG_ACTIVE) == 0) {
1355                         /*
1356                          * If this changer isn't already queued, queue it up.
1357                          */
1358                         if (softc->pinfo.index == CAM_UNQUEUED_INDEX) {
1359                                 softc->pinfo.priority = CAM_PRIORITY_NORMAL;
1360                                 softc->pinfo.generation =
1361                                         ++softc->changer->devq.generation;
1362                                 camq_insert(&softc->changer->devq,
1363                                             (cam_pinfo *)softc);
1364                         }
1365                         if (((softc->changer->flags & CHANGER_TIMEOUT_SCHED)==0)
1366                          && ((softc->changer->flags & CHANGER_NEED_TIMEOUT)==0)
1367                          && ((softc->changer->flags
1368                               & CHANGER_SHORT_TMOUT_SCHED)==0)) {
1369                                 softc->changer->flags |= CHANGER_MANUAL_CALL;
1370                                 cdrunchangerqueue(softc->changer);
1371                         } else
1372                                 msleep(&softc->changer, periph->sim->mtx,
1373                                     PRIBIO, "cgticb", 0);
1374                 }
1375         }
1376         return(cam_periph_getccb(periph, priority));
1377 }
1378
1379
1380 /*
1381  * Actually translate the requested transfer into one the physical driver
1382  * can understand.  The transfer is described by a buf and will include
1383  * only one physical transfer.
1384  */
1385 static void
1386 cdstrategy(struct bio *bp)
1387 {
1388         struct cam_periph *periph;
1389         struct cd_softc *softc;
1390
1391         periph = (struct cam_periph *)bp->bio_disk->d_drv1;
1392         if (periph == NULL) {
1393                 biofinish(bp, NULL, ENXIO);
1394                 return;
1395         }
1396
1397         cam_periph_lock(periph);
1398         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering cdstrategy\n"));
1399
1400         softc = (struct cd_softc *)periph->softc;
1401
1402         /*
1403          * If the device has been made invalid, error out
1404          */
1405         if ((softc->flags & CD_FLAG_INVALID)) {
1406                 cam_periph_unlock(periph);
1407                 biofinish(bp, NULL, ENXIO);
1408                 return;
1409         }
1410
1411         /*
1412          * If we don't have valid media, look for it before trying to
1413          * schedule the I/O.
1414          */
1415         if ((softc->flags & CD_FLAG_VALID_MEDIA) == 0) {
1416                 int error;
1417
1418                 error = cdcheckmedia(periph);
1419                 if (error != 0) {
1420                         cam_periph_unlock(periph);
1421                         biofinish(bp, NULL, error);
1422                         return;
1423                 }
1424         }
1425
1426         /*
1427          * Place it in the queue of disk activities for this disk
1428          */
1429         bioq_disksort(&softc->bio_queue, bp);
1430
1431         /*
1432          * Schedule ourselves for performing the work.  We do things
1433          * differently for changers.
1434          */
1435         if ((softc->flags & CD_FLAG_CHANGER) == 0)
1436                 xpt_schedule(periph, CAM_PRIORITY_NORMAL);
1437         else
1438                 cdschedule(periph, CAM_PRIORITY_NORMAL);
1439
1440         cam_periph_unlock(periph);
1441         return;
1442 }
1443
1444 static void
1445 cdstart(struct cam_periph *periph, union ccb *start_ccb)
1446 {
1447         struct cd_softc *softc;
1448         struct bio *bp;
1449         struct ccb_scsiio *csio;
1450         struct scsi_read_capacity_data *rcap;
1451
1452         softc = (struct cd_softc *)periph->softc;
1453
1454         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering cdstart\n"));
1455
1456         switch (softc->state) {
1457         case CD_STATE_NORMAL:
1458         {
1459                 bp = bioq_first(&softc->bio_queue);
1460                 if (periph->immediate_priority <= periph->pinfo.priority) {
1461                         start_ccb->ccb_h.ccb_state = CD_CCB_WAITING;
1462
1463                         SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
1464                                           periph_links.sle);
1465                         periph->immediate_priority = CAM_PRIORITY_NONE;
1466                         wakeup(&periph->ccb_list);
1467                 } else if (bp == NULL) {
1468                         xpt_release_ccb(start_ccb);
1469                 } else {
1470                         bioq_remove(&softc->bio_queue, bp);
1471
1472                         scsi_read_write(&start_ccb->csio,
1473                                         /*retries*/ cd_retry_count,
1474                                         /* cbfcnp */ cddone,
1475                                         MSG_SIMPLE_Q_TAG,
1476                                         /* read */bp->bio_cmd == BIO_READ,
1477                                         /* byte2 */ 0,
1478                                         /* minimum_cmd_size */ 10,
1479                                         /* lba */ bp->bio_offset /
1480                                           softc->params.blksize,
1481                                         bp->bio_bcount / softc->params.blksize,
1482                                         /* data_ptr */ bp->bio_data,
1483                                         /* dxfer_len */ bp->bio_bcount,
1484                                         /* sense_len */ SSD_FULL_SIZE,
1485                                         /* timeout */ 30000);
1486                         start_ccb->ccb_h.ccb_state = CD_CCB_BUFFER_IO;
1487
1488
1489                         LIST_INSERT_HEAD(&softc->pending_ccbs,
1490                                          &start_ccb->ccb_h, periph_links.le);
1491                         softc->outstanding_cmds++;
1492
1493                         /* We expect a unit attention from this device */
1494                         if ((softc->flags & CD_FLAG_RETRY_UA) != 0) {
1495                                 start_ccb->ccb_h.ccb_state |= CD_CCB_RETRY_UA;
1496                                 softc->flags &= ~CD_FLAG_RETRY_UA;
1497                         }
1498
1499                         start_ccb->ccb_h.ccb_bp = bp;
1500                         bp = bioq_first(&softc->bio_queue);
1501
1502                         xpt_action(start_ccb);
1503                 }
1504                 if (bp != NULL) {
1505                         /* Have more work to do, so ensure we stay scheduled */
1506                         xpt_schedule(periph, CAM_PRIORITY_NORMAL);
1507                 }
1508                 break;
1509         }
1510         case CD_STATE_PROBE:
1511         {
1512
1513                 rcap = (struct scsi_read_capacity_data *)malloc(sizeof(*rcap),
1514                     M_SCSICD, M_NOWAIT | M_ZERO);
1515                 if (rcap == NULL) {
1516                         xpt_print(periph->path,
1517                             "cdstart: Couldn't malloc read_capacity data\n");
1518                         /* cd_free_periph??? */
1519                         break;
1520                 }
1521                 csio = &start_ccb->csio;
1522                 scsi_read_capacity(csio,
1523                                    /*retries*/ cd_retry_count,
1524                                    cddone,
1525                                    MSG_SIMPLE_Q_TAG,
1526                                    rcap,
1527                                    SSD_FULL_SIZE,
1528                                    /*timeout*/20000);
1529                 start_ccb->ccb_h.ccb_bp = NULL;
1530                 start_ccb->ccb_h.ccb_state = CD_CCB_PROBE;
1531                 xpt_action(start_ccb);
1532                 break;
1533         }
1534         }
1535 }
1536
1537 static void
1538 cddone(struct cam_periph *periph, union ccb *done_ccb)
1539 {
1540         struct cd_softc *softc;
1541         struct ccb_scsiio *csio;
1542
1543         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering cddone\n"));
1544
1545         softc = (struct cd_softc *)periph->softc;
1546         csio = &done_ccb->csio;
1547
1548         switch (csio->ccb_h.ccb_state & CD_CCB_TYPE_MASK) {
1549         case CD_CCB_BUFFER_IO:
1550         {
1551                 struct bio      *bp;
1552                 int             error;
1553
1554                 bp = (struct bio *)done_ccb->ccb_h.ccb_bp;
1555                 error = 0;
1556
1557                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
1558                         int sf;
1559
1560                         if ((done_ccb->ccb_h.ccb_state & CD_CCB_RETRY_UA) != 0)
1561                                 sf = SF_RETRY_UA;
1562                         else
1563                                 sf = 0;
1564
1565                         error = cderror(done_ccb, CAM_RETRY_SELTO, sf);
1566                         if (error == ERESTART) {
1567                                 /*
1568                                  * A retry was scheuled, so
1569                                  * just return.
1570                                  */
1571                                 return;
1572                         }
1573                 }
1574
1575                 if (error != 0) {
1576                         xpt_print(periph->path,
1577                             "cddone: got error %#x back\n", error);
1578                         bioq_flush(&softc->bio_queue, NULL, EIO);
1579                         bp->bio_resid = bp->bio_bcount;
1580                         bp->bio_error = error;
1581                         bp->bio_flags |= BIO_ERROR;
1582                         if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
1583                                 cam_release_devq(done_ccb->ccb_h.path,
1584                                          /*relsim_flags*/0,
1585                                          /*reduction*/0,
1586                                          /*timeout*/0,
1587                                          /*getcount_only*/0);
1588
1589                 } else {
1590                         bp->bio_resid = csio->resid;
1591                         bp->bio_error = 0;
1592                         if (bp->bio_resid != 0) {
1593                                 /*
1594                                  * Short transfer ???
1595                                  * XXX: not sure this is correct for partial
1596                                  * transfers at EOM
1597                                  */
1598                                 bp->bio_flags |= BIO_ERROR;
1599                         }
1600                 }
1601
1602                 LIST_REMOVE(&done_ccb->ccb_h, periph_links.le);
1603                 softc->outstanding_cmds--;
1604
1605                 if (softc->flags & CD_FLAG_CHANGER)
1606                         cdchangerschedule(softc);
1607
1608                 biofinish(bp, NULL, 0);
1609                 break;
1610         }
1611         case CD_CCB_PROBE:
1612         {
1613                 struct     scsi_read_capacity_data *rdcap;
1614                 char       announce_buf[120]; /*
1615                                                * Currently (9/30/97) the
1616                                                * longest possible announce
1617                                                * buffer is 108 bytes, for the
1618                                                * first error case below.
1619                                                * That is 39 bytes for the
1620                                                * basic string, 16 bytes for the
1621                                                * biggest sense key (hardware
1622                                                * error), 52 bytes for the
1623                                                * text of the largest sense
1624                                                * qualifier valid for a CDROM,
1625                                                * (0x72, 0x03 or 0x04,
1626                                                * 0x03), and one byte for the
1627                                                * null terminating character.
1628                                                * To allow for longer strings,
1629                                                * the announce buffer is 120
1630                                                * bytes.
1631                                                */
1632                 struct     cd_params *cdp;
1633
1634                 cdp = &softc->params;
1635
1636                 rdcap = (struct scsi_read_capacity_data *)csio->data_ptr;
1637
1638                 cdp->disksize = scsi_4btoul (rdcap->addr) + 1;
1639                 cdp->blksize = scsi_4btoul (rdcap->length);
1640
1641                 if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) {
1642
1643                         snprintf(announce_buf, sizeof(announce_buf),
1644                                 "cd present [%lu x %lu byte records]",
1645                                 cdp->disksize, (u_long)cdp->blksize);
1646
1647                 } else {
1648                         int     error;
1649                         /*
1650                          * Retry any UNIT ATTENTION type errors.  They
1651                          * are expected at boot.
1652                          */
1653                         error = cderror(done_ccb, CAM_RETRY_SELTO,
1654                                         SF_RETRY_UA | SF_NO_PRINT);
1655                         if (error == ERESTART) {
1656                                 /*
1657                                  * A retry was scheuled, so
1658                                  * just return.
1659                                  */
1660                                 return;
1661                         } else if (error != 0) {
1662
1663                                 struct scsi_sense_data *sense;
1664                                 int asc, ascq;
1665                                 int sense_key, error_code;
1666                                 int have_sense;
1667                                 cam_status status;
1668                                 struct ccb_getdev cgd;
1669
1670                                 /* Don't wedge this device's queue */
1671                                 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
1672                                         cam_release_devq(done_ccb->ccb_h.path,
1673                                                  /*relsim_flags*/0,
1674                                                  /*reduction*/0,
1675                                                  /*timeout*/0,
1676                                                  /*getcount_only*/0);
1677
1678                                 status = done_ccb->ccb_h.status;
1679
1680                                 xpt_setup_ccb(&cgd.ccb_h,
1681                                               done_ccb->ccb_h.path,
1682                                               CAM_PRIORITY_NORMAL);
1683                                 cgd.ccb_h.func_code = XPT_GDEV_TYPE;
1684                                 xpt_action((union ccb *)&cgd);
1685
1686                                 if (((csio->ccb_h.flags & CAM_SENSE_PHYS) != 0)
1687                                  || ((csio->ccb_h.flags & CAM_SENSE_PTR) != 0)
1688                                  || ((status & CAM_AUTOSNS_VALID) == 0))
1689                                         have_sense = FALSE;
1690                                 else
1691                                         have_sense = TRUE;
1692
1693                                 if (have_sense) {
1694                                         sense = &csio->sense_data;
1695                                         scsi_extract_sense_len(sense,
1696                                             csio->sense_len - csio->sense_resid,
1697                                             &error_code, &sense_key, &asc,
1698                                             &ascq, /*show_errors*/ 1);
1699                                 }
1700                                 /*
1701                                  * Attach to anything that claims to be a
1702                                  * CDROM or WORM device, as long as it
1703                                  * doesn't return a "Logical unit not
1704                                  * supported" (0x25) error.
1705                                  */
1706                                 if ((have_sense) && (asc != 0x25)
1707                                  && (error_code == SSD_CURRENT_ERROR)) {
1708                                         const char *sense_key_desc;
1709                                         const char *asc_desc;
1710
1711                                         scsi_sense_desc(sense_key, asc, ascq,
1712                                                         &cgd.inq_data,
1713                                                         &sense_key_desc,
1714                                                         &asc_desc);
1715                                         snprintf(announce_buf,
1716                                             sizeof(announce_buf),
1717                                                 "Attempt to query device "
1718                                                 "size failed: %s, %s",
1719                                                 sense_key_desc,
1720                                                 asc_desc);
1721                                 } else if ((have_sense == 0)
1722                                       && ((status & CAM_STATUS_MASK) ==
1723                                            CAM_SCSI_STATUS_ERROR)
1724                                       && (csio->scsi_status ==
1725                                           SCSI_STATUS_BUSY)) {
1726                                         snprintf(announce_buf,
1727                                             sizeof(announce_buf),
1728                                             "Attempt to query device "
1729                                             "size failed: SCSI Status: %s",
1730                                             scsi_status_string(csio));
1731                                 } else if (SID_TYPE(&cgd.inq_data) == T_CDROM) {
1732                                         /*
1733                                          * We only print out an error for
1734                                          * CDROM type devices.  For WORM
1735                                          * devices, we don't print out an
1736                                          * error since a few WORM devices
1737                                          * don't support CDROM commands.
1738                                          * If we have sense information, go
1739                                          * ahead and print it out.
1740                                          * Otherwise, just say that we
1741                                          * couldn't attach.
1742                                          */
1743
1744                                         /*
1745                                          * Just print out the error, not
1746                                          * the full probe message, when we
1747                                          * don't attach.
1748                                          */
1749                                         if (have_sense)
1750                                                 scsi_sense_print(
1751                                                         &done_ccb->csio);
1752                                         else {
1753                                                 xpt_print(periph->path,
1754                                                     "got CAM status %#x\n",
1755                                                     done_ccb->ccb_h.status);
1756                                         }
1757                                         xpt_print(periph->path, "fatal error, "
1758                                             "failed to attach to device\n");
1759                                         /*
1760                                          * Invalidate this peripheral.
1761                                          */
1762                                         cam_periph_invalidate(periph);
1763
1764                                         announce_buf[0] = '\0';
1765                                 } else {
1766
1767                                         /*
1768                                          * Invalidate this peripheral.
1769                                          */
1770                                         cam_periph_invalidate(periph);
1771                                         announce_buf[0] = '\0';
1772                                 }
1773                         }
1774                 }
1775                 free(rdcap, M_SCSICD);
1776                 if (announce_buf[0] != '\0') {
1777                         xpt_announce_periph(periph, announce_buf);
1778                         if (softc->flags & CD_FLAG_CHANGER)
1779                                 cdchangerschedule(softc);
1780                         /*
1781                          * Create our sysctl variables, now that we know
1782                          * we have successfully attached.
1783                          */
1784                         taskqueue_enqueue(taskqueue_thread,&softc->sysctl_task);
1785                 }
1786                 softc->state = CD_STATE_NORMAL;
1787                 /*
1788                  * Since our peripheral may be invalidated by an error
1789                  * above or an external event, we must release our CCB
1790                  * before releasing the probe lock on the peripheral.
1791                  * The peripheral will only go away once the last lock
1792                  * is removed, and we need it around for the CCB release
1793                  * operation.
1794                  */
1795                 xpt_release_ccb(done_ccb);
1796                 cam_periph_unhold(periph);
1797                 return;
1798         }
1799         case CD_CCB_WAITING:
1800         {
1801                 /* Caller will release the CCB */
1802                 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
1803                           ("trying to wakeup ccbwait\n"));
1804
1805                 wakeup(&done_ccb->ccb_h.cbfcnp);
1806                 return;
1807         }
1808         default:
1809                 break;
1810         }
1811         xpt_release_ccb(done_ccb);
1812 }
1813
1814 static union cd_pages *
1815 cdgetpage(struct cd_mode_params *mode_params)
1816 {
1817         union cd_pages *page;
1818
1819         if (mode_params->cdb_size == 10)
1820                 page = (union cd_pages *)find_mode_page_10(
1821                         (struct scsi_mode_header_10 *)mode_params->mode_buf);
1822         else
1823                 page = (union cd_pages *)find_mode_page_6(
1824                         (struct scsi_mode_header_6 *)mode_params->mode_buf);
1825
1826         return (page);
1827 }
1828
1829 static int
1830 cdgetpagesize(int page_num)
1831 {
1832         int i;
1833
1834         for (i = 0; i < (sizeof(cd_page_size_table)/
1835              sizeof(cd_page_size_table[0])); i++) {
1836                 if (cd_page_size_table[i].page == page_num)
1837                         return (cd_page_size_table[i].page_size);
1838         }
1839
1840         return (-1);
1841 }
1842
1843 static int
1844 cdioctl(struct disk *dp, u_long cmd, void *addr, int flag, struct thread *td)
1845 {
1846
1847         struct  cam_periph *periph;
1848         struct  cd_softc *softc;
1849         int     nocopyout, error = 0;
1850
1851         periph = (struct cam_periph *)dp->d_drv1;
1852         if (periph == NULL)
1853                 return(ENXIO);
1854
1855         cam_periph_lock(periph);
1856         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering cdioctl\n"));
1857
1858         softc = (struct cd_softc *)periph->softc;
1859
1860         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
1861                   ("trying to do ioctl %#lx\n", cmd));
1862
1863         if ((error = cam_periph_hold(periph, PRIBIO | PCATCH)) != 0) {
1864                 cam_periph_unlock(periph);
1865                 cam_periph_release(periph);
1866                 return (error);
1867         }
1868
1869         /*
1870          * If we don't have media loaded, check for it.  If still don't
1871          * have media loaded, we can only do a load or eject.
1872          *
1873          * We only care whether media is loaded if this is a cd-specific ioctl
1874          * (thus the IOCGROUP check below).  Note that this will break if
1875          * anyone adds any ioctls into the switch statement below that don't
1876          * have their ioctl group set to 'c'.
1877          */
1878         if (((softc->flags & CD_FLAG_VALID_MEDIA) == 0)
1879          && ((cmd != CDIOCCLOSE)
1880           && (cmd != CDIOCEJECT))
1881          && (IOCGROUP(cmd) == 'c')) {
1882                 error = cdcheckmedia(periph);
1883                 if (error != 0) {
1884                         cam_periph_unhold(periph);
1885                         cam_periph_unlock(periph);
1886                         return (error);
1887                 }
1888         }
1889         /*
1890          * Drop the lock here so later mallocs can use WAITOK.  The periph
1891          * is essentially locked still with the cam_periph_hold call above.
1892          */
1893         cam_periph_unlock(periph);
1894
1895         nocopyout = 0;
1896         switch (cmd) {
1897
1898         case CDIOCPLAYTRACKS:
1899                 {
1900                         struct ioc_play_track *args
1901                             = (struct ioc_play_track *) addr;
1902                         struct cd_mode_params params;
1903                         union cd_pages *page;
1904
1905                         params.alloc_len = sizeof(union cd_mode_data_6_10);
1906                         params.mode_buf = malloc(params.alloc_len, M_SCSICD,
1907                                                  M_WAITOK | M_ZERO);
1908
1909                         cam_periph_lock(periph);
1910                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
1911                                   ("trying to do CDIOCPLAYTRACKS\n"));
1912
1913                         error = cdgetmode(periph, &params, AUDIO_PAGE);
1914                         if (error) {
1915                                 free(params.mode_buf, M_SCSICD);
1916                                 cam_periph_unlock(periph);
1917                                 break;
1918                         }
1919                         page = cdgetpage(&params);
1920
1921                         page->audio.flags &= ~CD_PA_SOTC;
1922                         page->audio.flags |= CD_PA_IMMED;
1923                         error = cdsetmode(periph, &params);
1924                         free(params.mode_buf, M_SCSICD);
1925                         if (error) {
1926                                 cam_periph_unlock(periph);
1927                                 break;
1928                         }
1929
1930                         /*
1931                          * This was originally implemented with the PLAY
1932                          * AUDIO TRACK INDEX command, but that command was
1933                          * deprecated after SCSI-2.  Most (all?) SCSI CDROM
1934                          * drives support it but ATAPI and ATAPI-derivative
1935                          * drives don't seem to support it.  So we keep a
1936                          * cache of the table of contents and translate
1937                          * track numbers to MSF format.
1938                          */
1939                         if (softc->flags & CD_FLAG_VALID_TOC) {
1940                                 union msf_lba *sentry, *eentry;
1941                                 int st, et;
1942
1943                                 if (args->end_track <
1944                                     softc->toc.header.ending_track + 1)
1945                                         args->end_track++;
1946                                 if (args->end_track >
1947                                     softc->toc.header.ending_track + 1)
1948                                         args->end_track =
1949                                             softc->toc.header.ending_track + 1;
1950                                 st = args->start_track -
1951                                         softc->toc.header.starting_track;
1952                                 et = args->end_track -
1953                                         softc->toc.header.starting_track;
1954                                 if ((st < 0)
1955                                  || (et < 0)
1956                                  || (st > (softc->toc.header.ending_track -
1957                                      softc->toc.header.starting_track))) {
1958                                         error = EINVAL;
1959                                         break;
1960                                 }
1961                                 sentry = &softc->toc.entries[st].addr;
1962                                 eentry = &softc->toc.entries[et].addr;
1963                                 error = cdplaymsf(periph,
1964                                                   sentry->msf.minute,
1965                                                   sentry->msf.second,
1966                                                   sentry->msf.frame,
1967                                                   eentry->msf.minute,
1968                                                   eentry->msf.second,
1969                                                   eentry->msf.frame);
1970                         } else {
1971                                 /*
1972                                  * If we don't have a valid TOC, try the
1973                                  * play track index command.  It is part of
1974                                  * the SCSI-2 spec, but was removed in the
1975                                  * MMC specs.  ATAPI and ATAPI-derived
1976                                  * drives don't support it.
1977                                  */
1978                                 if (softc->quirks & CD_Q_BCD_TRACKS) {
1979                                         args->start_track =
1980                                                 bin2bcd(args->start_track);
1981                                         args->end_track =
1982                                                 bin2bcd(args->end_track);
1983                                 }
1984                                 error = cdplaytracks(periph,
1985                                                      args->start_track,
1986                                                      args->start_index,
1987                                                      args->end_track,
1988                                                      args->end_index);
1989                         }
1990                         cam_periph_unlock(periph);
1991                 }
1992                 break;
1993         case CDIOCPLAYMSF:
1994                 {
1995                         struct ioc_play_msf *args
1996                                 = (struct ioc_play_msf *) addr;
1997                         struct cd_mode_params params;
1998                         union cd_pages *page;
1999
2000                         params.alloc_len = sizeof(union cd_mode_data_6_10);
2001                         params.mode_buf = malloc(params.alloc_len, M_SCSICD,
2002                                                  M_WAITOK | M_ZERO);
2003
2004                         cam_periph_lock(periph);
2005                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
2006                                   ("trying to do CDIOCPLAYMSF\n"));
2007
2008                         error = cdgetmode(periph, &params, AUDIO_PAGE);
2009                         if (error) {
2010                                 free(params.mode_buf, M_SCSICD);
2011                                 cam_periph_unlock(periph);
2012                                 break;
2013                         }
2014                         page = cdgetpage(&params);
2015
2016                         page->audio.flags &= ~CD_PA_SOTC;
2017                         page->audio.flags |= CD_PA_IMMED;
2018                         error = cdsetmode(periph, &params);
2019                         free(params.mode_buf, M_SCSICD);
2020                         if (error) {
2021                                 cam_periph_unlock(periph);
2022                                 break;
2023                         }
2024                         error = cdplaymsf(periph,
2025                                           args->start_m,
2026                                           args->start_s,
2027                                           args->start_f,
2028                                           args->end_m,
2029                                           args->end_s,
2030                                           args->end_f);
2031                         cam_periph_unlock(periph);
2032                 }
2033                 break;
2034         case CDIOCPLAYBLOCKS:
2035                 {
2036                         struct ioc_play_blocks *args
2037                                 = (struct ioc_play_blocks *) addr;
2038                         struct cd_mode_params params;
2039                         union cd_pages *page;
2040
2041                         params.alloc_len = sizeof(union cd_mode_data_6_10);
2042                         params.mode_buf = malloc(params.alloc_len, M_SCSICD,
2043                                                  M_WAITOK | M_ZERO);
2044
2045                         cam_periph_lock(periph);
2046                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
2047                                   ("trying to do CDIOCPLAYBLOCKS\n"));
2048
2049
2050                         error = cdgetmode(periph, &params, AUDIO_PAGE);
2051                         if (error) {
2052                                 free(params.mode_buf, M_SCSICD);
2053                                 cam_periph_unlock(periph);
2054                                 break;
2055                         }
2056                         page = cdgetpage(&params);
2057
2058                         page->audio.flags &= ~CD_PA_SOTC;
2059                         page->audio.flags |= CD_PA_IMMED;
2060                         error = cdsetmode(periph, &params);
2061                         free(params.mode_buf, M_SCSICD);
2062                         if (error) {
2063                                 cam_periph_unlock(periph);
2064                                 break;
2065                         }
2066                         error = cdplay(periph, args->blk, args->len);
2067                         cam_periph_unlock(periph);
2068                 }
2069                 break;
2070         case CDIOCREADSUBCHANNEL_SYSSPACE:
2071                 nocopyout = 1;
2072                 /* Fallthrough */
2073         case CDIOCREADSUBCHANNEL:
2074                 {
2075                         struct ioc_read_subchannel *args
2076                                 = (struct ioc_read_subchannel *) addr;
2077                         struct cd_sub_channel_info *data;
2078                         u_int32_t len = args->data_len;
2079
2080                         data = malloc(sizeof(struct cd_sub_channel_info),
2081                                       M_SCSICD, M_WAITOK | M_ZERO);
2082
2083                         cam_periph_lock(periph);
2084                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
2085                                   ("trying to do CDIOCREADSUBCHANNEL\n"));
2086
2087                         if ((len > sizeof(struct cd_sub_channel_info)) ||
2088                             (len < sizeof(struct cd_sub_channel_header))) {
2089                                 printf(
2090                                         "scsi_cd: cdioctl: "
2091                                         "cdioreadsubchannel: error, len=%d\n",
2092                                         len);
2093                                 error = EINVAL;
2094                                 free(data, M_SCSICD);
2095                                 cam_periph_unlock(periph);
2096                                 break;
2097                         }
2098
2099                         if (softc->quirks & CD_Q_BCD_TRACKS)
2100                                 args->track = bin2bcd(args->track);
2101
2102                         error = cdreadsubchannel(periph, args->address_format,
2103                                 args->data_format, args->track, data, len);
2104
2105                         if (error) {
2106                                 free(data, M_SCSICD);
2107                                 cam_periph_unlock(periph);
2108                                 break;
2109                         }
2110                         if (softc->quirks & CD_Q_BCD_TRACKS)
2111                                 data->what.track_info.track_number =
2112                                     bcd2bin(data->what.track_info.track_number);
2113                         len = min(len, ((data->header.data_len[0] << 8) +
2114                                 data->header.data_len[1] +
2115                                 sizeof(struct cd_sub_channel_header)));
2116                         cam_periph_unlock(periph);
2117                         if (nocopyout == 0) {
2118                                 if (copyout(data, args->data, len) != 0) {
2119                                         error = EFAULT;
2120                                 }
2121                         } else {
2122                                 bcopy(data, args->data, len);
2123                         }
2124                         free(data, M_SCSICD);
2125                 }
2126                 break;
2127
2128         case CDIOREADTOCHEADER:
2129                 {
2130                         struct ioc_toc_header *th;
2131
2132                         th = malloc(sizeof(struct ioc_toc_header), M_SCSICD,
2133                                     M_WAITOK | M_ZERO);
2134
2135                         cam_periph_lock(periph);
2136                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
2137                                   ("trying to do CDIOREADTOCHEADER\n"));
2138
2139                         error = cdreadtoc(periph, 0, 0, (u_int8_t *)th,
2140                                           sizeof (*th), /*sense_flags*/SF_NO_PRINT);
2141                         if (error) {
2142                                 free(th, M_SCSICD);
2143                                 cam_periph_unlock(periph);
2144                                 break;
2145                         }
2146                         if (softc->quirks & CD_Q_BCD_TRACKS) {
2147                                 /* we are going to have to convert the BCD
2148                                  * encoding on the cd to what is expected
2149                                  */
2150                                 th->starting_track =
2151                                         bcd2bin(th->starting_track);
2152                                 th->ending_track = bcd2bin(th->ending_track);
2153                         }
2154                         th->len = ntohs(th->len);
2155                         bcopy(th, addr, sizeof(*th));
2156                         free(th, M_SCSICD);
2157                         cam_periph_unlock(periph);
2158                 }
2159                 break;
2160         case CDIOREADTOCENTRYS:
2161                 {
2162                         struct cd_tocdata *data;
2163                         struct cd_toc_single *lead;
2164                         struct ioc_read_toc_entry *te =
2165                                 (struct ioc_read_toc_entry *) addr;
2166                         struct ioc_toc_header *th;
2167                         u_int32_t len, readlen, idx, num;
2168                         u_int32_t starting_track = te->starting_track;
2169
2170                         data = malloc(sizeof(*data), M_SCSICD, M_WAITOK | M_ZERO);
2171                         lead = malloc(sizeof(*lead), M_SCSICD, M_WAITOK | M_ZERO);
2172
2173                         cam_periph_lock(periph);
2174                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
2175                                   ("trying to do CDIOREADTOCENTRYS\n"));
2176
2177                         if (te->data_len < sizeof(struct cd_toc_entry)
2178                          || (te->data_len % sizeof(struct cd_toc_entry)) != 0
2179                          || (te->address_format != CD_MSF_FORMAT
2180                           && te->address_format != CD_LBA_FORMAT)) {
2181                                 error = EINVAL;
2182                                 printf("scsi_cd: error in readtocentries, "
2183                                        "returning EINVAL\n");
2184                                 free(data, M_SCSICD);
2185                                 free(lead, M_SCSICD);
2186                                 cam_periph_unlock(periph);
2187                                 break;
2188                         }
2189
2190                         th = &data->header;
2191                         error = cdreadtoc(periph, 0, 0, (u_int8_t *)th,
2192                                           sizeof (*th), /*sense_flags*/0);
2193                         if (error) {
2194                                 free(data, M_SCSICD);
2195                                 free(lead, M_SCSICD);
2196                                 cam_periph_unlock(periph);
2197                                 break;
2198                         }
2199
2200                         if (softc->quirks & CD_Q_BCD_TRACKS) {
2201                                 /* we are going to have to convert the BCD
2202                                  * encoding on the cd to what is expected
2203                                  */
2204                                 th->starting_track =
2205                                     bcd2bin(th->starting_track);
2206                                 th->ending_track = bcd2bin(th->ending_track);
2207                         }
2208
2209                         if (starting_track == 0)
2210                                 starting_track = th->starting_track;
2211                         else if (starting_track == LEADOUT)
2212                                 starting_track = th->ending_track + 1;
2213                         else if (starting_track < th->starting_track ||
2214                                  starting_track > th->ending_track + 1) {
2215                                 printf("scsi_cd: error in readtocentries, "
2216                                        "returning EINVAL\n");
2217                                 free(data, M_SCSICD);
2218                                 free(lead, M_SCSICD);
2219                                 cam_periph_unlock(periph);
2220                                 error = EINVAL;
2221                                 break;
2222                         }
2223
2224                         /* calculate reading length without leadout entry */
2225                         readlen = (th->ending_track - starting_track + 1) *
2226                                   sizeof(struct cd_toc_entry);
2227
2228                         /* and with leadout entry */
2229                         len = readlen + sizeof(struct cd_toc_entry);
2230                         if (te->data_len < len) {
2231                                 len = te->data_len;
2232                                 if (readlen > len)
2233                                         readlen = len;
2234                         }
2235                         if (len > sizeof(data->entries)) {
2236                                 printf("scsi_cd: error in readtocentries, "
2237                                        "returning EINVAL\n");
2238                                 error = EINVAL;
2239                                 free(data, M_SCSICD);
2240                                 free(lead, M_SCSICD);
2241                                 cam_periph_unlock(periph);
2242                                 break;
2243                         }
2244                         num = len / sizeof(struct cd_toc_entry);
2245
2246                         if (readlen > 0) {
2247                                 error = cdreadtoc(periph, te->address_format,
2248                                                   starting_track,
2249                                                   (u_int8_t *)data,
2250                                                   readlen + sizeof (*th),
2251                                                   /*sense_flags*/0);
2252                                 if (error) {
2253                                         free(data, M_SCSICD);
2254                                         free(lead, M_SCSICD);
2255                                         cam_periph_unlock(periph);
2256                                         break;
2257                                 }
2258                         }
2259
2260                         /* make leadout entry if needed */
2261                         idx = starting_track + num - 1;
2262                         if (softc->quirks & CD_Q_BCD_TRACKS)
2263                                 th->ending_track = bcd2bin(th->ending_track);
2264                         if (idx == th->ending_track + 1) {
2265                                 error = cdreadtoc(periph, te->address_format,
2266                                                   LEADOUT, (u_int8_t *)lead,
2267                                                   sizeof(*lead),
2268                                                   /*sense_flags*/0);
2269                                 if (error) {
2270                                         free(data, M_SCSICD);
2271                                         free(lead, M_SCSICD);
2272                                         cam_periph_unlock(periph);
2273                                         break;
2274                                 }
2275                                 data->entries[idx - starting_track] =
2276                                         lead->entry;
2277                         }
2278                         if (softc->quirks & CD_Q_BCD_TRACKS) {
2279                                 for (idx = 0; idx < num - 1; idx++) {
2280                                         data->entries[idx].track =
2281                                             bcd2bin(data->entries[idx].track);
2282                                 }
2283                         }
2284
2285                         cam_periph_unlock(periph);
2286                         error = copyout(data->entries, te->data, len);
2287                         free(data, M_SCSICD);
2288                         free(lead, M_SCSICD);
2289                 }
2290                 break;
2291         case CDIOREADTOCENTRY:
2292                 {
2293                         struct cd_toc_single *data;
2294                         struct ioc_read_toc_single_entry *te =
2295                                 (struct ioc_read_toc_single_entry *) addr;
2296                         struct ioc_toc_header *th;
2297                         u_int32_t track;
2298
2299                         data = malloc(sizeof(*data), M_SCSICD, M_WAITOK | M_ZERO);
2300
2301                         cam_periph_lock(periph);
2302                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
2303                                   ("trying to do CDIOREADTOCENTRY\n"));
2304
2305                         if (te->address_format != CD_MSF_FORMAT
2306                             && te->address_format != CD_LBA_FORMAT) {
2307                                 printf("error in readtocentry, "
2308                                        " returning EINVAL\n");
2309                                 free(data, M_SCSICD);
2310                                 error = EINVAL;
2311                                 cam_periph_unlock(periph);
2312                                 break;
2313                         }
2314
2315                         th = &data->header;
2316                         error = cdreadtoc(periph, 0, 0, (u_int8_t *)th,
2317                                           sizeof (*th), /*sense_flags*/0);
2318                         if (error) {
2319                                 free(data, M_SCSICD);
2320                                 cam_periph_unlock(periph);
2321                                 break;
2322                         }
2323
2324                         if (softc->quirks & CD_Q_BCD_TRACKS) {
2325                                 /* we are going to have to convert the BCD
2326                                  * encoding on the cd to what is expected
2327                                  */
2328                                 th->starting_track =
2329                                     bcd2bin(th->starting_track);
2330                                 th->ending_track = bcd2bin(th->ending_track);
2331                         }
2332                         track = te->track;
2333                         if (track == 0)
2334                                 track = th->starting_track;
2335                         else if (track == LEADOUT)
2336                                 /* OK */;
2337                         else if (track < th->starting_track ||
2338                                  track > th->ending_track + 1) {
2339                                 printf("error in readtocentry, "
2340                                        " returning EINVAL\n");
2341                                 free(data, M_SCSICD);
2342                                 error = EINVAL;
2343                                 cam_periph_unlock(periph);
2344                                 break;
2345                         }
2346
2347                         error = cdreadtoc(periph, te->address_format, track,
2348                                           (u_int8_t *)data, sizeof(*data),
2349                                           /*sense_flags*/0);
2350                         if (error) {
2351                                 free(data, M_SCSICD);
2352                                 cam_periph_unlock(periph);
2353                                 break;
2354                         }
2355
2356                         if (softc->quirks & CD_Q_BCD_TRACKS)
2357                                 data->entry.track = bcd2bin(data->entry.track);
2358                         bcopy(&data->entry, &te->entry,
2359                               sizeof(struct cd_toc_entry));
2360                         free(data, M_SCSICD);
2361                         cam_periph_unlock(periph);
2362                 }
2363                 break;
2364         case CDIOCSETPATCH:
2365                 {
2366                         struct ioc_patch *arg = (struct ioc_patch *)addr;
2367                         struct cd_mode_params params;
2368                         union cd_pages *page;
2369
2370                         params.alloc_len = sizeof(union cd_mode_data_6_10);
2371                         params.mode_buf = malloc(params.alloc_len, M_SCSICD,
2372                                                  M_WAITOK | M_ZERO);
2373
2374                         cam_periph_lock(periph);
2375                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
2376                                   ("trying to do CDIOCSETPATCH\n"));
2377
2378                         error = cdgetmode(periph, &params, AUDIO_PAGE);
2379                         if (error) {
2380                                 free(params.mode_buf, M_SCSICD);
2381                                 cam_periph_unlock(periph);
2382                                 break;
2383                         }
2384                         page = cdgetpage(&params);
2385
2386                         page->audio.port[LEFT_PORT].channels =
2387                                 arg->patch[0];
2388                         page->audio.port[RIGHT_PORT].channels =
2389                                 arg->patch[1];
2390                         page->audio.port[2].channels = arg->patch[2];
2391                         page->audio.port[3].channels = arg->patch[3];
2392                         error = cdsetmode(periph, &params);
2393                         free(params.mode_buf, M_SCSICD);
2394                         cam_periph_unlock(periph);
2395                 }
2396                 break;
2397         case CDIOCGETVOL:
2398                 {
2399                         struct ioc_vol *arg = (struct ioc_vol *) addr;
2400                         struct cd_mode_params params;
2401                         union cd_pages *page;
2402
2403                         params.alloc_len = sizeof(union cd_mode_data_6_10);
2404                         params.mode_buf = malloc(params.alloc_len, M_SCSICD,
2405                                                  M_WAITOK | M_ZERO);
2406
2407                         cam_periph_lock(periph);
2408                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
2409                                   ("trying to do CDIOCGETVOL\n"));
2410
2411                         error = cdgetmode(periph, &params, AUDIO_PAGE);
2412                         if (error) {
2413                                 free(params.mode_buf, M_SCSICD);
2414                                 cam_periph_unlock(periph);
2415                                 break;
2416                         }
2417                         page = cdgetpage(&params);
2418
2419                         arg->vol[LEFT_PORT] =
2420                                 page->audio.port[LEFT_PORT].volume;
2421                         arg->vol[RIGHT_PORT] =
2422                                 page->audio.port[RIGHT_PORT].volume;
2423                         arg->vol[2] = page->audio.port[2].volume;
2424                         arg->vol[3] = page->audio.port[3].volume;
2425                         free(params.mode_buf, M_SCSICD);
2426                         cam_periph_unlock(periph);
2427                 }
2428                 break;
2429         case CDIOCSETVOL:
2430                 {
2431                         struct ioc_vol *arg = (struct ioc_vol *) addr;
2432                         struct cd_mode_params params;
2433                         union cd_pages *page;
2434
2435                         params.alloc_len = sizeof(union cd_mode_data_6_10);
2436                         params.mode_buf = malloc(params.alloc_len, M_SCSICD,
2437                                                  M_WAITOK | M_ZERO);
2438
2439                         cam_periph_lock(periph);
2440                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
2441                                   ("trying to do CDIOCSETVOL\n"));
2442
2443                         error = cdgetmode(periph, &params, AUDIO_PAGE);
2444                         if (error) {
2445                                 free(params.mode_buf, M_SCSICD);
2446                                 cam_periph_unlock(periph);
2447                                 break;
2448                         }
2449                         page = cdgetpage(&params);
2450
2451                         page->audio.port[LEFT_PORT].channels = CHANNEL_0;
2452                         page->audio.port[LEFT_PORT].volume =
2453                                 arg->vol[LEFT_PORT];
2454                         page->audio.port[RIGHT_PORT].channels = CHANNEL_1;
2455                         page->audio.port[RIGHT_PORT].volume =
2456                                 arg->vol[RIGHT_PORT];
2457                         page->audio.port[2].volume = arg->vol[2];
2458                         page->audio.port[3].volume = arg->vol[3];
2459                         error = cdsetmode(periph, &params);
2460                         cam_periph_unlock(periph);
2461                         free(params.mode_buf, M_SCSICD);
2462                 }
2463                 break;
2464         case CDIOCSETMONO:
2465                 {
2466                         struct cd_mode_params params;
2467                         union cd_pages *page;
2468
2469                         params.alloc_len = sizeof(union cd_mode_data_6_10);
2470                         params.mode_buf = malloc(params.alloc_len, M_SCSICD,
2471                                                  M_WAITOK | M_ZERO);
2472
2473                         cam_periph_lock(periph);
2474                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
2475                                   ("trying to do CDIOCSETMONO\n"));
2476
2477                         error = cdgetmode(periph, &params, AUDIO_PAGE);
2478                         if (error) {
2479                                 free(params.mode_buf, M_SCSICD);
2480                                 cam_periph_unlock(periph);
2481                                 break;
2482                         }
2483                         page = cdgetpage(&params);
2484
2485                         page->audio.port[LEFT_PORT].channels =
2486                                 LEFT_CHANNEL | RIGHT_CHANNEL;
2487                         page->audio.port[RIGHT_PORT].channels =
2488                                 LEFT_CHANNEL | RIGHT_CHANNEL;
2489                         page->audio.port[2].channels = 0;
2490                         page->audio.port[3].channels = 0;
2491                         error = cdsetmode(periph, &params);
2492                         cam_periph_unlock(periph);
2493                         free(params.mode_buf, M_SCSICD);
2494                 }
2495                 break;
2496         case CDIOCSETSTEREO:
2497                 {
2498                         struct cd_mode_params params;
2499                         union cd_pages *page;
2500
2501                         params.alloc_len = sizeof(union cd_mode_data_6_10);
2502                         params.mode_buf = malloc(params.alloc_len, M_SCSICD,
2503                                                  M_WAITOK | M_ZERO);
2504
2505                         cam_periph_lock(periph);
2506                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
2507                                   ("trying to do CDIOCSETSTEREO\n"));
2508
2509                         error = cdgetmode(periph, &params, AUDIO_PAGE);
2510                         if (error) {
2511                                 free(params.mode_buf, M_SCSICD);
2512                                 cam_periph_unlock(periph);
2513                                 break;
2514                         }
2515                         page = cdgetpage(&params);
2516
2517                         page->audio.port[LEFT_PORT].channels =
2518                                 LEFT_CHANNEL;
2519                         page->audio.port[RIGHT_PORT].channels =
2520                                 RIGHT_CHANNEL;
2521                         page->audio.port[2].channels = 0;
2522                         page->audio.port[3].channels = 0;
2523                         error = cdsetmode(periph, &params);
2524                         free(params.mode_buf, M_SCSICD);
2525                         cam_periph_unlock(periph);
2526                 }
2527                 break;
2528         case CDIOCSETMUTE:
2529                 {
2530                         struct cd_mode_params params;
2531                         union cd_pages *page;
2532
2533                         params.alloc_len = sizeof(union cd_mode_data_6_10);
2534                         params.mode_buf = malloc(params.alloc_len, M_SCSICD,
2535                                                  M_WAITOK | M_ZERO);
2536
2537                         cam_periph_lock(periph);
2538                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
2539                                   ("trying to do CDIOCSETMUTE\n"));
2540
2541                         error = cdgetmode(periph, &params, AUDIO_PAGE);
2542                         if (error) {
2543                                 free(params.mode_buf, M_SCSICD);
2544                                 cam_periph_unlock(periph);
2545                                 break;
2546                         }
2547                         page = cdgetpage(&params);
2548
2549                         page->audio.port[LEFT_PORT].channels = 0;
2550                         page->audio.port[RIGHT_PORT].channels = 0;
2551                         page->audio.port[2].channels = 0;
2552                         page->audio.port[3].channels = 0;
2553                         error = cdsetmode(periph, &params);
2554                         free(params.mode_buf, M_SCSICD);
2555                         cam_periph_unlock(periph);
2556                 }
2557                 break;
2558         case CDIOCSETLEFT:
2559                 {
2560                         struct cd_mode_params params;
2561                         union cd_pages *page;
2562
2563                         params.alloc_len = sizeof(union cd_mode_data_6_10);
2564                         params.mode_buf = malloc(params.alloc_len, M_SCSICD,
2565                                                  M_WAITOK | M_ZERO);
2566
2567                         cam_periph_lock(periph);
2568                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
2569                                   ("trying to do CDIOCSETLEFT\n"));
2570
2571                         error = cdgetmode(periph, &params, AUDIO_PAGE);
2572                         if (error) {
2573                                 free(params.mode_buf, M_SCSICD);
2574                                 cam_periph_unlock(periph);
2575                                 break;
2576                         }
2577                         page = cdgetpage(&params);
2578
2579                         page->audio.port[LEFT_PORT].channels = LEFT_CHANNEL;
2580                         page->audio.port[RIGHT_PORT].channels = LEFT_CHANNEL;
2581                         page->audio.port[2].channels = 0;
2582                         page->audio.port[3].channels = 0;
2583                         error = cdsetmode(periph, &params);
2584                         free(params.mode_buf, M_SCSICD);
2585                         cam_periph_unlock(periph);
2586                 }
2587                 break;
2588         case CDIOCSETRIGHT:
2589                 {
2590                         struct cd_mode_params params;
2591                         union cd_pages *page;
2592
2593                         params.alloc_len = sizeof(union cd_mode_data_6_10);
2594                         params.mode_buf = malloc(params.alloc_len, M_SCSICD,
2595                                                  M_WAITOK | M_ZERO);
2596
2597                         cam_periph_lock(periph);
2598                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
2599                                   ("trying to do CDIOCSETRIGHT\n"));
2600
2601                         error = cdgetmode(periph, &params, AUDIO_PAGE);
2602                         if (error) {
2603                                 free(params.mode_buf, M_SCSICD);
2604                                 cam_periph_unlock(periph);
2605                                 break;
2606                         }
2607                         page = cdgetpage(&params);
2608
2609                         page->audio.port[LEFT_PORT].channels = RIGHT_CHANNEL;
2610                         page->audio.port[RIGHT_PORT].channels = RIGHT_CHANNEL;
2611                         page->audio.port[2].channels = 0;
2612                         page->audio.port[3].channels = 0;
2613                         error = cdsetmode(periph, &params);
2614                         free(params.mode_buf, M_SCSICD);
2615                         cam_periph_unlock(periph);
2616                 }
2617                 break;
2618         case CDIOCRESUME:
2619                 cam_periph_lock(periph);
2620                 error = cdpause(periph, 1);
2621                 cam_periph_unlock(periph);
2622                 break;
2623         case CDIOCPAUSE:
2624                 cam_periph_lock(periph);
2625                 error = cdpause(periph, 0);
2626                 cam_periph_unlock(periph);
2627                 break;
2628         case CDIOCSTART:
2629                 cam_periph_lock(periph);
2630                 error = cdstartunit(periph, 0);
2631                 cam_periph_unlock(periph);
2632                 break;
2633         case CDIOCCLOSE:
2634                 cam_periph_lock(periph);
2635                 error = cdstartunit(periph, 1);
2636                 cam_periph_unlock(periph);
2637                 break;
2638         case CDIOCSTOP:
2639                 cam_periph_lock(periph);
2640                 error = cdstopunit(periph, 0);
2641                 cam_periph_unlock(periph);
2642                 break;
2643         case CDIOCEJECT:
2644                 cam_periph_lock(periph);
2645                 error = cdstopunit(periph, 1);
2646                 cam_periph_unlock(periph);
2647                 break;
2648         case CDIOCALLOW:
2649                 cam_periph_lock(periph);
2650                 cdprevent(periph, PR_ALLOW);
2651                 cam_periph_unlock(periph);
2652                 break;
2653         case CDIOCPREVENT:
2654                 cam_periph_lock(periph);
2655                 cdprevent(periph, PR_PREVENT);
2656                 cam_periph_unlock(periph);
2657                 break;
2658         case CDIOCSETDEBUG:
2659                 /* sc_link->flags |= (SDEV_DB1 | SDEV_DB2); */
2660                 error = ENOTTY;
2661                 break;
2662         case CDIOCCLRDEBUG:
2663                 /* sc_link->flags &= ~(SDEV_DB1 | SDEV_DB2); */
2664                 error = ENOTTY;
2665                 break;
2666         case CDIOCRESET:
2667                 /* return (cd_reset(periph)); */
2668                 error = ENOTTY;
2669                 break;
2670         case CDRIOCREADSPEED:
2671                 cam_periph_lock(periph);
2672                 error = cdsetspeed(periph, *(u_int32_t *)addr, CDR_MAX_SPEED);
2673                 cam_periph_unlock(periph);
2674                 break;
2675         case CDRIOCWRITESPEED:
2676                 cam_periph_lock(periph);
2677                 error = cdsetspeed(periph, CDR_MAX_SPEED, *(u_int32_t *)addr);
2678                 cam_periph_unlock(periph);
2679                 break;
2680         case DVDIOCSENDKEY:
2681         case DVDIOCREPORTKEY: {
2682                 struct dvd_authinfo *authinfo;
2683
2684                 authinfo = (struct dvd_authinfo *)addr;
2685
2686                 if (cmd == DVDIOCREPORTKEY)
2687                         error = cdreportkey(periph, authinfo);
2688                 else
2689                         error = cdsendkey(periph, authinfo);
2690                 break;
2691                 }
2692         case DVDIOCREADSTRUCTURE: {
2693                 struct dvd_struct *dvdstruct;
2694
2695                 dvdstruct = (struct dvd_struct *)addr;
2696
2697                 error = cdreaddvdstructure(periph, dvdstruct);
2698
2699                 break;
2700         }
2701         default:
2702                 cam_periph_lock(periph);
2703                 error = cam_periph_ioctl(periph, cmd, addr, cderror);
2704                 cam_periph_unlock(periph);
2705                 break;
2706         }
2707
2708         cam_periph_lock(periph);
2709         cam_periph_unhold(periph);
2710
2711         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("leaving cdioctl\n"));
2712         if (error && bootverbose) {
2713                 printf("scsi_cd.c::ioctl cmd=%08lx error=%d\n", cmd, error);
2714         }
2715         cam_periph_unlock(periph);
2716
2717         return (error);
2718 }
2719
2720 static void
2721 cdprevent(struct cam_periph *periph, int action)
2722 {
2723         union   ccb *ccb;
2724         struct  cd_softc *softc;
2725         int     error;
2726
2727         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering cdprevent\n"));
2728
2729         softc = (struct cd_softc *)periph->softc;
2730
2731         if (((action == PR_ALLOW)
2732           && (softc->flags & CD_FLAG_DISC_LOCKED) == 0)
2733          || ((action == PR_PREVENT)
2734           && (softc->flags & CD_FLAG_DISC_LOCKED) != 0)) {
2735                 return;
2736         }
2737
2738         ccb = cdgetccb(periph, CAM_PRIORITY_NORMAL);
2739
2740         scsi_prevent(&ccb->csio,
2741                      /*retries*/ cd_retry_count,
2742                      cddone,
2743                      MSG_SIMPLE_Q_TAG,
2744                      action,
2745                      SSD_FULL_SIZE,
2746                      /* timeout */60000);
2747
2748         error = cdrunccb(ccb, cderror, /*cam_flags*/CAM_RETRY_SELTO,
2749                         /*sense_flags*/SF_RETRY_UA|SF_NO_PRINT);
2750
2751         xpt_release_ccb(ccb);
2752
2753         if (error == 0) {
2754                 if (action == PR_ALLOW)
2755                         softc->flags &= ~CD_FLAG_DISC_LOCKED;
2756                 else
2757                         softc->flags |= CD_FLAG_DISC_LOCKED;
2758         }
2759 }
2760
2761 /*
2762  * XXX: the disk media and sector size is only really able to change
2763  * XXX: while the device is closed.
2764  */
2765 static int
2766 cdcheckmedia(struct cam_periph *periph)
2767 {
2768         struct cd_softc *softc;
2769         struct ioc_toc_header *toch;
2770         struct cd_toc_single leadout;
2771         u_int32_t size, toclen;
2772         int error, num_entries, cdindex;
2773
2774         softc = (struct cd_softc *)periph->softc;
2775
2776         cdprevent(periph, PR_PREVENT);
2777         softc->disk->d_sectorsize = 2048;
2778         softc->disk->d_mediasize = 0;
2779
2780         /*
2781          * Get the disc size and block size.  If we can't get it, we don't
2782          * have media, most likely.
2783          */
2784         if ((error = cdsize(periph, &size)) != 0) {
2785                 softc->flags &= ~(CD_FLAG_VALID_MEDIA|CD_FLAG_VALID_TOC);
2786                 cdprevent(periph, PR_ALLOW);
2787                 return (error);
2788         } else {
2789                 softc->flags |= CD_FLAG_VALID_MEDIA;
2790                 softc->disk->d_sectorsize = softc->params.blksize;
2791                 softc->disk->d_mediasize =
2792                     (off_t)softc->params.blksize * softc->params.disksize;
2793         }
2794
2795         /*
2796          * Now we check the table of contents.  This (currently) is only
2797          * used for the CDIOCPLAYTRACKS ioctl.  It may be used later to do
2798          * things like present a separate entry in /dev for each track,
2799          * like that acd(4) driver does.
2800          */
2801         bzero(&softc->toc, sizeof(softc->toc));
2802         toch = &softc->toc.header;
2803         /*
2804          * We will get errors here for media that doesn't have a table of
2805          * contents.  According to the MMC-3 spec: "When a Read TOC/PMA/ATIP
2806          * command is presented for a DDCD/CD-R/RW media, where the first TOC
2807          * has not been recorded (no complete session) and the Format codes
2808          * 0000b, 0001b, or 0010b are specified, this command shall be rejected
2809          * with an INVALID FIELD IN CDB.  Devices that are not capable of
2810          * reading an incomplete session on DDC/CD-R/RW media shall report
2811          * CANNOT READ MEDIUM - INCOMPATIBLE FORMAT."
2812          *
2813          * So this isn't fatal if we can't read the table of contents, it
2814          * just means that the user won't be able to issue the play tracks
2815          * ioctl, and likely lots of other stuff won't work either.  They
2816          * need to burn the CD before we can do a whole lot with it.  So
2817          * we don't print anything here if we get an error back.
2818          */
2819         error = cdreadtoc(periph, 0, 0, (u_int8_t *)toch, sizeof(*toch),
2820                           SF_NO_PRINT);
2821         /*
2822          * Errors in reading the table of contents aren't fatal, we just
2823          * won't have a valid table of contents cached.
2824          */
2825         if (error != 0) {
2826                 error = 0;
2827                 bzero(&softc->toc, sizeof(softc->toc));
2828                 goto bailout;
2829         }
2830
2831         if (softc->quirks & CD_Q_BCD_TRACKS) {
2832                 toch->starting_track = bcd2bin(toch->starting_track);
2833                 toch->ending_track = bcd2bin(toch->ending_track);
2834         }
2835
2836         /* Number of TOC entries, plus leadout */
2837         num_entries = (toch->ending_track - toch->starting_track) + 2;
2838
2839         if (num_entries <= 0)
2840                 goto bailout;
2841
2842         toclen = num_entries * sizeof(struct cd_toc_entry);
2843
2844         error = cdreadtoc(periph, CD_MSF_FORMAT, toch->starting_track,
2845                           (u_int8_t *)&softc->toc, toclen + sizeof(*toch),
2846                           SF_NO_PRINT);
2847         if (error != 0) {
2848                 error = 0;
2849                 bzero(&softc->toc, sizeof(softc->toc));
2850                 goto bailout;
2851         }
2852
2853         if (softc->quirks & CD_Q_BCD_TRACKS) {
2854                 toch->starting_track = bcd2bin(toch->starting_track);
2855                 toch->ending_track = bcd2bin(toch->ending_track);
2856         }
2857         /*
2858          * XXX KDM is this necessary?  Probably only if the drive doesn't
2859          * return leadout information with the table of contents.
2860          */
2861         cdindex = toch->starting_track + num_entries -1;
2862         if (cdindex == toch->ending_track + 1) {
2863
2864                 error = cdreadtoc(periph, CD_MSF_FORMAT, LEADOUT,
2865                                   (u_int8_t *)&leadout, sizeof(leadout),
2866                                   SF_NO_PRINT);
2867                 if (error != 0) {
2868                         error = 0;
2869                         goto bailout;
2870                 }
2871                 softc->toc.entries[cdindex - toch->starting_track] =
2872                         leadout.entry;
2873         }
2874         if (softc->quirks & CD_Q_BCD_TRACKS) {
2875                 for (cdindex = 0; cdindex < num_entries - 1; cdindex++) {
2876                         softc->toc.entries[cdindex].track =
2877                                 bcd2bin(softc->toc.entries[cdindex].track);
2878                 }
2879         }
2880
2881         softc->flags |= CD_FLAG_VALID_TOC;
2882
2883 bailout:
2884
2885         /*
2886          * We unconditionally (re)set the blocksize each time the
2887          * CD device is opened.  This is because the CD can change,
2888          * and therefore the blocksize might change.
2889          * XXX problems here if some slice or partition is still
2890          * open with the old size?
2891          */
2892         if ((softc->disk->d_devstat->flags & DEVSTAT_BS_UNAVAILABLE) != 0)
2893                 softc->disk->d_devstat->flags &= ~DEVSTAT_BS_UNAVAILABLE;
2894         softc->disk->d_devstat->block_size = softc->params.blksize;
2895
2896         return (error);
2897 }
2898
2899 static int
2900 cdsize(struct cam_periph *periph, u_int32_t *size)
2901 {
2902         struct cd_softc *softc;
2903         union ccb *ccb;
2904         struct scsi_read_capacity_data *rcap_buf;
2905         int error;
2906
2907         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering cdsize\n"));
2908
2909         softc = (struct cd_softc *)periph->softc;
2910
2911         ccb = cdgetccb(periph, CAM_PRIORITY_NORMAL);
2912
2913         /* XXX Should be M_WAITOK */
2914         rcap_buf = malloc(sizeof(struct scsi_read_capacity_data),
2915                           M_SCSICD, M_NOWAIT | M_ZERO);
2916         if (rcap_buf == NULL)
2917                 return (ENOMEM);
2918
2919         scsi_read_capacity(&ccb->csio,
2920                            /*retries*/ cd_retry_count,
2921                            cddone,
2922                            MSG_SIMPLE_Q_TAG,
2923                            rcap_buf,
2924                            SSD_FULL_SIZE,
2925                            /* timeout */20000);
2926
2927         error = cdrunccb(ccb, cderror, /*cam_flags*/CAM_RETRY_SELTO,
2928                          /*sense_flags*/SF_RETRY_UA|SF_NO_PRINT);
2929
2930         xpt_release_ccb(ccb);
2931
2932         softc->params.disksize = scsi_4btoul(rcap_buf->addr) + 1;
2933         softc->params.blksize  = scsi_4btoul(rcap_buf->length);
2934         /* Make sure we got at least some block size. */
2935         if (error == 0 && softc->params.blksize == 0)
2936                 error = EIO;
2937         /*
2938          * SCSI-3 mandates that the reported blocksize shall be 2048.
2939          * Older drives sometimes report funny values, trim it down to
2940          * 2048, or other parts of the kernel will get confused.
2941          *
2942          * XXX we leave drives alone that might report 512 bytes, as
2943          * well as drives reporting more weird sizes like perhaps 4K.
2944          */
2945         if (softc->params.blksize > 2048 && softc->params.blksize <= 2352)
2946                 softc->params.blksize = 2048;
2947
2948         free(rcap_buf, M_SCSICD);
2949         *size = softc->params.disksize;
2950
2951         return (error);
2952
2953 }
2954
2955 static int
2956 cd6byteworkaround(union ccb *ccb)
2957 {
2958         u_int8_t *cdb;
2959         struct cam_periph *periph;
2960         struct cd_softc *softc;
2961         struct cd_mode_params *params;
2962         int frozen, found;
2963
2964         periph = xpt_path_periph(ccb->ccb_h.path);
2965         softc = (struct cd_softc *)periph->softc;
2966
2967         cdb = ccb->csio.cdb_io.cdb_bytes;
2968
2969         if ((ccb->ccb_h.flags & CAM_CDB_POINTER)
2970          || ((cdb[0] != MODE_SENSE_6)
2971           && (cdb[0] != MODE_SELECT_6)))
2972                 return (0);
2973
2974         /*
2975          * Because there is no convenient place to stash the overall
2976          * cd_mode_params structure pointer, we have to grab it like this.
2977          * This means that ALL MODE_SENSE and MODE_SELECT requests in the
2978          * cd(4) driver MUST go through cdgetmode() and cdsetmode()!
2979          *
2980          * XXX It would be nice if, at some point, we could increase the
2981          * number of available peripheral private pointers.  Both pointers
2982          * are currently used in most every peripheral driver.
2983          */
2984         found = 0;
2985
2986         STAILQ_FOREACH(params, &softc->mode_queue, links) {
2987                 if (params->mode_buf == ccb->csio.data_ptr) {
2988                         found = 1;
2989                         break;
2990                 }
2991         }
2992
2993         /*
2994          * This shouldn't happen.  All mode sense and mode select
2995          * operations in the cd(4) driver MUST go through cdgetmode() and
2996          * cdsetmode()!
2997          */
2998         if (found == 0) {
2999                 xpt_print(periph->path,
3000                     "mode buffer not found in mode queue!\n");
3001                 return (0);
3002         }
3003
3004         params->cdb_size = 10;
3005         softc->minimum_command_size = 10;
3006         xpt_print(ccb->ccb_h.path,
3007             "%s(6) failed, increasing minimum CDB size to 10 bytes\n",
3008             (cdb[0] == MODE_SENSE_6) ? "MODE_SENSE" : "MODE_SELECT");
3009
3010         if (cdb[0] == MODE_SENSE_6) {
3011                 struct scsi_mode_sense_10 ms10;
3012                 struct scsi_mode_sense_6 *ms6;
3013                 int len;
3014
3015                 ms6 = (struct scsi_mode_sense_6 *)cdb;
3016
3017                 bzero(&ms10, sizeof(ms10));
3018                 ms10.opcode = MODE_SENSE_10;
3019                 ms10.byte2 = ms6->byte2;
3020                 ms10.page = ms6->page;
3021
3022                 /*
3023                  * 10 byte mode header, block descriptor,
3024                  * sizeof(union cd_pages)
3025                  */
3026                 len = sizeof(struct cd_mode_data_10);
3027                 ccb->csio.dxfer_len = len;
3028
3029                 scsi_ulto2b(len, ms10.length);
3030                 ms10.control = ms6->control;
3031                 bcopy(&ms10, cdb, 10);
3032                 ccb->csio.cdb_len = 10;
3033         } else {
3034                 struct scsi_mode_select_10 ms10;
3035                 struct scsi_mode_select_6 *ms6;
3036                 struct scsi_mode_header_6 *header6;
3037                 struct scsi_mode_header_10 *header10;
3038                 struct scsi_mode_page_header *page_header;
3039                 int blk_desc_len, page_num, page_size, len;
3040
3041                 ms6 = (struct scsi_mode_select_6 *)cdb;
3042
3043                 bzero(&ms10, sizeof(ms10));
3044                 ms10.opcode = MODE_SELECT_10;
3045                 ms10.byte2 = ms6->byte2;
3046
3047                 header6 = (struct scsi_mode_header_6 *)params->mode_buf;
3048                 header10 = (struct scsi_mode_header_10 *)params->mode_buf;
3049
3050                 page_header = find_mode_page_6(header6);
3051                 page_num = page_header->page_code;
3052
3053                 blk_desc_len = header6->blk_desc_len;
3054
3055                 page_size = cdgetpagesize(page_num);
3056
3057                 if (page_size != (page_header->page_length +
3058                     sizeof(*page_header)))
3059                         page_size = page_header->page_length +
3060                                 sizeof(*page_header);
3061
3062                 len = sizeof(*header10) + blk_desc_len + page_size;
3063
3064                 len = min(params->alloc_len, len);
3065
3066                 /*
3067                  * Since the 6 byte parameter header is shorter than the 10
3068                  * byte parameter header, we need to copy the actual mode
3069                  * page data, and the block descriptor, if any, so things wind
3070                  * up in the right place.  The regions will overlap, but
3071                  * bcopy() does the right thing.
3072                  */
3073                 bcopy(params->mode_buf + sizeof(*header6),
3074                       params->mode_buf + sizeof(*header10),
3075                       len - sizeof(*header10));
3076
3077                 /* Make sure these fields are set correctly. */
3078                 scsi_ulto2b(0, header10->data_length);
3079                 header10->medium_type = 0;
3080                 scsi_ulto2b(blk_desc_len, header10->blk_desc_len);
3081
3082                 ccb->csio.dxfer_len = len;
3083
3084                 scsi_ulto2b(len, ms10.length);
3085                 ms10.control = ms6->control;
3086                 bcopy(&ms10, cdb, 10);
3087                 ccb->csio.cdb_len = 10;
3088         }
3089
3090         frozen = (ccb->ccb_h.status & CAM_DEV_QFRZN) != 0;
3091         ccb->ccb_h.status = CAM_REQUEUE_REQ;
3092         xpt_action(ccb);
3093         if (frozen) {
3094                 cam_release_devq(ccb->ccb_h.path,
3095                                  /*relsim_flags*/0,
3096                                  /*openings*/0,
3097                                  /*timeout*/0,
3098                                  /*getcount_only*/0);
3099         }
3100
3101         return (ERESTART);
3102 }
3103
3104 static int
3105 cderror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
3106 {
3107         struct cd_softc *softc;
3108         struct cam_periph *periph;
3109         int error;
3110
3111         periph = xpt_path_periph(ccb->ccb_h.path);
3112         softc = (struct cd_softc *)periph->softc;
3113
3114         error = 0;
3115
3116         /*
3117          * We use a status of CAM_REQ_INVALID as shorthand -- if a 6 byte
3118          * CDB comes back with this particular error, try transforming it
3119          * into the 10 byte version.
3120          */
3121         if ((ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_INVALID) {
3122                 error = cd6byteworkaround(ccb);
3123         } else if (((ccb->ccb_h.status & CAM_STATUS_MASK) ==
3124                      CAM_SCSI_STATUS_ERROR)
3125          && (ccb->ccb_h.status & CAM_AUTOSNS_VALID)
3126          && (ccb->csio.scsi_status == SCSI_STATUS_CHECK_COND)
3127          && ((ccb->ccb_h.flags & CAM_SENSE_PHYS) == 0)
3128          && ((ccb->ccb_h.flags & CAM_SENSE_PTR) == 0)) {
3129                 int sense_key, error_code, asc, ascq;
3130
3131                 scsi_extract_sense_len(&ccb->csio.sense_data,
3132                     ccb->csio.sense_len - ccb->csio.sense_resid, &error_code,
3133                     &sense_key, &asc, &ascq, /*show_errors*/ 1);
3134                 if (sense_key == SSD_KEY_ILLEGAL_REQUEST)
3135                         error = cd6byteworkaround(ccb);
3136         }
3137
3138         if (error == ERESTART)
3139                 return (error);
3140
3141         /*
3142          * XXX
3143          * Until we have a better way of doing pack validation,
3144          * don't treat UAs as errors.
3145          */
3146         sense_flags |= SF_RETRY_UA;
3147         return (cam_periph_error(ccb, cam_flags, sense_flags,
3148                                  &softc->saved_ccb));
3149 }
3150
3151 /*
3152  * Read table of contents
3153  */
3154 static int
3155 cdreadtoc(struct cam_periph *periph, u_int32_t mode, u_int32_t start,
3156           u_int8_t *data, u_int32_t len, u_int32_t sense_flags)
3157 {
3158         struct scsi_read_toc *scsi_cmd;
3159         u_int32_t ntoc;
3160         struct ccb_scsiio *csio;
3161         union ccb *ccb;
3162         int error;
3163
3164         ntoc = len;
3165         error = 0;
3166
3167         ccb = cdgetccb(periph, CAM_PRIORITY_NORMAL);
3168
3169         csio = &ccb->csio;
3170
3171         cam_fill_csio(csio,
3172                       /* retries */ cd_retry_count,
3173                       /* cbfcnp */ cddone,
3174                       /* flags */ CAM_DIR_IN,
3175                       /* tag_action */ MSG_SIMPLE_Q_TAG,
3176                       /* data_ptr */ data,
3177                       /* dxfer_len */ len,
3178                       /* sense_len */ SSD_FULL_SIZE,
3179                       sizeof(struct scsi_read_toc),
3180                       /* timeout */ 50000);
3181
3182         scsi_cmd = (struct scsi_read_toc *)&csio->cdb_io.cdb_bytes;
3183         bzero (scsi_cmd, sizeof(*scsi_cmd));
3184
3185         if (mode == CD_MSF_FORMAT)
3186                 scsi_cmd->byte2 |= CD_MSF;
3187         scsi_cmd->from_track = start;
3188         /* scsi_ulto2b(ntoc, (u_int8_t *)scsi_cmd->data_len); */
3189         scsi_cmd->data_len[0] = (ntoc) >> 8;
3190         scsi_cmd->data_len[1] = (ntoc) & 0xff;
3191
3192         scsi_cmd->op_code = READ_TOC;
3193
3194         error = cdrunccb(ccb, cderror, /*cam_flags*/CAM_RETRY_SELTO,
3195                          /*sense_flags*/SF_RETRY_UA | sense_flags);
3196
3197         xpt_release_ccb(ccb);
3198
3199         return(error);
3200 }
3201
3202 static int
3203 cdreadsubchannel(struct cam_periph *periph, u_int32_t mode,
3204                  u_int32_t format, int track,
3205                  struct cd_sub_channel_info *data, u_int32_t len)
3206 {
3207         struct scsi_read_subchannel *scsi_cmd;
3208         struct ccb_scsiio *csio;
3209         union ccb *ccb;
3210         int error;
3211
3212         error = 0;
3213
3214         ccb = cdgetccb(periph, CAM_PRIORITY_NORMAL);
3215
3216         csio = &ccb->csio;
3217
3218         cam_fill_csio(csio,
3219                       /* retries */ cd_retry_count,
3220                       /* cbfcnp */ cddone,
3221                       /* flags */ CAM_DIR_IN,
3222                       /* tag_action */ MSG_SIMPLE_Q_TAG,
3223                       /* data_ptr */ (u_int8_t *)data,
3224                       /* dxfer_len */ len,
3225                       /* sense_len */ SSD_FULL_SIZE,
3226                       sizeof(struct scsi_read_subchannel),
3227                       /* timeout */ 50000);
3228
3229         scsi_cmd = (struct scsi_read_subchannel *)&csio->cdb_io.cdb_bytes;
3230         bzero (scsi_cmd, sizeof(*scsi_cmd));
3231
3232         scsi_cmd->op_code = READ_SUBCHANNEL;
3233         if (mode == CD_MSF_FORMAT)
3234                 scsi_cmd->byte1 |= CD_MSF;
3235         scsi_cmd->byte2 = SRS_SUBQ;
3236         scsi_cmd->subchan_format = format;
3237         scsi_cmd->track = track;
3238         scsi_ulto2b(len, (u_int8_t *)scsi_cmd->data_len);
3239         scsi_cmd->control = 0;
3240
3241         error = cdrunccb(ccb, cderror, /*cam_flags*/CAM_RETRY_SELTO,
3242                          /*sense_flags*/SF_RETRY_UA);
3243
3244         xpt_release_ccb(ccb);
3245
3246         return(error);
3247 }
3248
3249
3250 /*
3251  * All MODE_SENSE requests in the cd(4) driver MUST go through this
3252  * routine.  See comments in cd6byteworkaround() for details.
3253  */
3254 static int
3255 cdgetmode(struct cam_periph *periph, struct cd_mode_params *data,
3256           u_int32_t page)
3257 {
3258         struct ccb_scsiio *csio;
3259         struct cd_softc *softc;
3260         union ccb *ccb;
3261         int param_len;
3262         int error;
3263
3264         softc = (struct cd_softc *)periph->softc;
3265
3266         ccb = cdgetccb(periph, CAM_PRIORITY_NORMAL);
3267
3268         csio = &ccb->csio;
3269
3270         data->cdb_size = softc->minimum_command_size;
3271         if (data->cdb_size < 10)
3272                 param_len = sizeof(struct cd_mode_data);
3273         else
3274                 param_len = sizeof(struct cd_mode_data_10);
3275
3276         /* Don't say we've got more room than we actually allocated */
3277         param_len = min(param_len, data->alloc_len);
3278
3279         scsi_mode_sense_len(csio,
3280                             /* retries */ cd_retry_count,
3281                             /* cbfcnp */ cddone,
3282                             /* tag_action */ MSG_SIMPLE_Q_TAG,
3283                             /* dbd */ 0,
3284                             /* page_code */ SMS_PAGE_CTRL_CURRENT,
3285                             /* page */ page,
3286                             /* param_buf */ data->mode_buf,
3287                             /* param_len */ param_len,
3288                             /* minimum_cmd_size */ softc->minimum_command_size,
3289                             /* sense_len */ SSD_FULL_SIZE,
3290                             /* timeout */ 50000);
3291
3292         /*
3293          * It would be nice not to have to do this, but there's no
3294          * available pointer in the CCB that would allow us to stuff the
3295          * mode params structure in there and retrieve it in
3296          * cd6byteworkaround(), so we can set the cdb size.  The cdb size
3297          * lets the caller know what CDB size we ended up using, so they
3298          * can find the actual mode page offset.
3299          */
3300         STAILQ_INSERT_TAIL(&softc->mode_queue, data, links);
3301
3302         error = cdrunccb(ccb, cderror, /*cam_flags*/CAM_RETRY_SELTO,
3303                          /*sense_flags*/SF_RETRY_UA);
3304
3305         xpt_release_ccb(ccb);
3306
3307         STAILQ_REMOVE(&softc->mode_queue, data, cd_mode_params, links);
3308
3309         /*
3310          * This is a bit of belt-and-suspenders checking, but if we run
3311          * into a situation where the target sends back multiple block
3312          * descriptors, we might not have enough space in the buffer to
3313          * see the whole mode page.  Better to return an error than
3314          * potentially access memory beyond our malloced region.
3315          */
3316         if (error == 0) {
3317                 u_int32_t data_len;
3318
3319                 if (data->cdb_size == 10) {
3320                         struct scsi_mode_header_10 *hdr10;
3321
3322                         hdr10 = (struct scsi_mode_header_10 *)data->mode_buf;
3323                         data_len = scsi_2btoul(hdr10->data_length);
3324                         data_len += sizeof(hdr10->data_length);
3325                 } else {
3326                         struct scsi_mode_header_6 *hdr6;
3327
3328                         hdr6 = (struct scsi_mode_header_6 *)data->mode_buf;
3329                         data_len = hdr6->data_length;
3330                         data_len += sizeof(hdr6->data_length);
3331                 }
3332
3333                 /*
3334                  * Complain if there is more mode data available than we
3335                  * allocated space for.  This could potentially happen if
3336                  * we miscalculated the page length for some reason, if the
3337                  * drive returns multiple block descriptors, or if it sets
3338                  * the data length incorrectly.
3339                  */
3340                 if (data_len > data->alloc_len) {
3341                         xpt_print(periph->path, "allocated modepage %d length "
3342                             "%d < returned length %d\n", page, data->alloc_len,
3343                             data_len);
3344                         error = ENOSPC;
3345                 }
3346         }
3347         return (error);
3348 }
3349
3350 /*
3351  * All MODE_SELECT requests in the cd(4) driver MUST go through this
3352  * routine.  See comments in cd6byteworkaround() for details.
3353  */
3354 static int
3355 cdsetmode(struct cam_periph *periph, struct cd_mode_params *data)
3356 {
3357         struct ccb_scsiio *csio;
3358         struct cd_softc *softc;
3359         union ccb *ccb;
3360         int cdb_size, param_len;
3361         int error;
3362
3363         softc = (struct cd_softc *)periph->softc;
3364
3365         ccb = cdgetccb(periph, CAM_PRIORITY_NORMAL);
3366
3367         csio = &ccb->csio;
3368
3369         error = 0;
3370
3371         /*
3372          * If the data is formatted for the 10 byte version of the mode
3373          * select parameter list, we need to use the 10 byte CDB.
3374          * Otherwise, we use whatever the stored minimum command size.
3375          */
3376         if (data->cdb_size == 10)
3377                 cdb_size = data->cdb_size;
3378         else
3379                 cdb_size = softc->minimum_command_size;
3380
3381         if (cdb_size >= 10) {
3382                 struct scsi_mode_header_10 *mode_header;
3383                 u_int32_t data_len;
3384
3385                 mode_header = (struct scsi_mode_header_10 *)data->mode_buf;
3386
3387                 data_len = scsi_2btoul(mode_header->data_length);
3388
3389                 scsi_ulto2b(0, mode_header->data_length);
3390                 /*
3391                  * SONY drives do not allow a mode select with a medium_type
3392                  * value that has just been returned by a mode sense; use a
3393                  * medium_type of 0 (Default) instead.
3394                  */
3395                 mode_header->medium_type = 0;
3396
3397                 /*
3398                  * Pass back whatever the drive passed to us, plus the size
3399                  * of the data length field.
3400                  */
3401                 param_len = data_len + sizeof(mode_header->data_length);
3402
3403         } else {
3404                 struct scsi_mode_header_6 *mode_header;
3405
3406                 mode_header = (struct scsi_mode_header_6 *)data->mode_buf;
3407
3408                 param_len = mode_header->data_length + 1;
3409
3410                 mode_header->data_length = 0;
3411                 /*
3412                  * SONY drives do not allow a mode select with a medium_type
3413                  * value that has just been returned by a mode sense; use a
3414                  * medium_type of 0 (Default) instead.
3415                  */
3416                 mode_header->medium_type = 0;
3417         }
3418
3419         /* Don't say we've got more room than we actually allocated */
3420         param_len = min(param_len, data->alloc_len);
3421
3422         scsi_mode_select_len(csio,
3423                              /* retries */ cd_retry_count,
3424                              /* cbfcnp */ cddone,
3425                              /* tag_action */ MSG_SIMPLE_Q_TAG,
3426                              /* scsi_page_fmt */ 1,
3427                              /* save_pages */ 0,
3428                              /* param_buf */ data->mode_buf,
3429                              /* param_len */ param_len,
3430                              /* minimum_cmd_size */ cdb_size,
3431                              /* sense_len */ SSD_FULL_SIZE,
3432                              /* timeout */ 50000);
3433
3434         /* See comments in cdgetmode() and cd6byteworkaround(). */
3435         STAILQ_INSERT_TAIL(&softc->mode_queue, data, links);
3436
3437         error = cdrunccb(ccb, cderror, /*cam_flags*/CAM_RETRY_SELTO,
3438                          /*sense_flags*/SF_RETRY_UA);
3439
3440         xpt_release_ccb(ccb);
3441
3442         STAILQ_REMOVE(&softc->mode_queue, data, cd_mode_params, links);
3443
3444         return (error);
3445 }
3446
3447
3448 static int
3449 cdplay(struct cam_periph *periph, u_int32_t blk, u_int32_t len)
3450 {
3451         struct ccb_scsiio *csio;
3452         union ccb *ccb;
3453         int error;
3454         u_int8_t cdb_len;
3455
3456         error = 0;
3457         ccb = cdgetccb(periph, CAM_PRIORITY_NORMAL);
3458         csio = &ccb->csio;
3459         /*
3460          * Use the smallest possible command to perform the operation.
3461          */
3462         if ((len & 0xffff0000) == 0) {
3463                 /*
3464                  * We can fit in a 10 byte cdb.
3465                  */
3466                 struct scsi_play_10 *scsi_cmd;
3467
3468                 scsi_cmd = (struct scsi_play_10 *)&csio->cdb_io.cdb_bytes;
3469                 bzero (scsi_cmd, sizeof(*scsi_cmd));
3470                 scsi_cmd->op_code = PLAY_10;
3471                 scsi_ulto4b(blk, (u_int8_t *)scsi_cmd->blk_addr);
3472                 scsi_ulto2b(len, (u_int8_t *)scsi_cmd->xfer_len);
3473                 cdb_len = sizeof(*scsi_cmd);
3474         } else  {
3475                 struct scsi_play_12 *scsi_cmd;
3476
3477                 scsi_cmd = (struct scsi_play_12 *)&csio->cdb_io.cdb_bytes;
3478                 bzero (scsi_cmd, sizeof(*scsi_cmd));
3479                 scsi_cmd->op_code = PLAY_12;
3480                 scsi_ulto4b(blk, (u_int8_t *)scsi_cmd->blk_addr);
3481                 scsi_ulto4b(len, (u_int8_t *)scsi_cmd->xfer_len);
3482                 cdb_len = sizeof(*scsi_cmd);
3483         }
3484         cam_fill_csio(csio,
3485                       /*retries*/ cd_retry_count,
3486                       cddone,
3487                       /*flags*/CAM_DIR_NONE,
3488                       MSG_SIMPLE_Q_TAG,
3489                       /*dataptr*/NULL,
3490                       /*datalen*/0,
3491                       /*sense_len*/SSD_FULL_SIZE,
3492                       cdb_len,
3493                       /*timeout*/50 * 1000);
3494
3495         error = cdrunccb(ccb, cderror, /*cam_flags*/CAM_RETRY_SELTO,
3496                          /*sense_flags*/SF_RETRY_UA);
3497
3498         xpt_release_ccb(ccb);
3499
3500         return(error);
3501 }
3502
3503 static int
3504 cdplaymsf(struct cam_periph *periph, u_int32_t startm, u_int32_t starts,
3505           u_int32_t startf, u_int32_t endm, u_int32_t ends, u_int32_t endf)
3506 {
3507         struct scsi_play_msf *scsi_cmd;
3508         struct ccb_scsiio *csio;
3509         union ccb *ccb;
3510         int error;
3511
3512         error = 0;
3513
3514         ccb = cdgetccb(periph, CAM_PRIORITY_NORMAL);
3515
3516         csio = &ccb->csio;
3517
3518         cam_fill_csio(csio,
3519                       /* retries */ cd_retry_count,
3520                       /* cbfcnp */ cddone,
3521                       /* flags */ CAM_DIR_NONE,
3522                       /* tag_action */ MSG_SIMPLE_Q_TAG,
3523                       /* data_ptr */ NULL,
3524                       /* dxfer_len */ 0,
3525                       /* sense_len */ SSD_FULL_SIZE,
3526                       sizeof(struct scsi_play_msf),
3527                       /* timeout */ 50000);
3528
3529         scsi_cmd = (struct scsi_play_msf *)&csio->cdb_io.cdb_bytes;
3530         bzero (scsi_cmd, sizeof(*scsi_cmd));
3531
3532         scsi_cmd->op_code = PLAY_MSF;
3533         scsi_cmd->start_m = startm;
3534         scsi_cmd->start_s = starts;
3535         scsi_cmd->start_f = startf;
3536         scsi_cmd->end_m = endm;
3537         scsi_cmd->end_s = ends;
3538         scsi_cmd->end_f = endf;
3539
3540         error = cdrunccb(ccb, cderror, /*cam_flags*/CAM_RETRY_SELTO,
3541                          /*sense_flags*/SF_RETRY_UA);
3542
3543         xpt_release_ccb(ccb);
3544
3545         return(error);
3546 }
3547
3548
3549 static int
3550 cdplaytracks(struct cam_periph *periph, u_int32_t strack, u_int32_t sindex,
3551              u_int32_t etrack, u_int32_t eindex)
3552 {
3553         struct scsi_play_track *scsi_cmd;
3554         struct ccb_scsiio *csio;
3555         union ccb *ccb;
3556         int error;
3557
3558         error = 0;
3559
3560         ccb = cdgetccb(periph, CAM_PRIORITY_NORMAL);
3561
3562         csio = &ccb->csio;
3563
3564         cam_fill_csio(csio,
3565                       /* retries */ cd_retry_count,
3566                       /* cbfcnp */ cddone,
3567                       /* flags */ CAM_DIR_NONE,
3568                       /* tag_action */ MSG_SIMPLE_Q_TAG,
3569                       /* data_ptr */ NULL,
3570                       /* dxfer_len */ 0,
3571                       /* sense_len */ SSD_FULL_SIZE,
3572                       sizeof(struct scsi_play_track),
3573                       /* timeout */ 50000);
3574
3575         scsi_cmd = (struct scsi_play_track *)&csio->cdb_io.cdb_bytes;
3576         bzero (scsi_cmd, sizeof(*scsi_cmd));
3577
3578         scsi_cmd->op_code = PLAY_TRACK;
3579         scsi_cmd->start_track = strack;
3580         scsi_cmd->start_index = sindex;
3581         scsi_cmd->end_track = etrack;
3582         scsi_cmd->end_index = eindex;
3583
3584         error = cdrunccb(ccb, cderror, /*cam_flags*/CAM_RETRY_SELTO,
3585                          /*sense_flags*/SF_RETRY_UA);
3586
3587         xpt_release_ccb(ccb);
3588
3589         return(error);
3590 }
3591
3592 static int
3593 cdpause(struct cam_periph *periph, u_int32_t go)
3594 {
3595         struct scsi_pause *scsi_cmd;
3596         struct ccb_scsiio *csio;
3597         union ccb *ccb;
3598         int error;
3599
3600         error = 0;
3601
3602         ccb = cdgetccb(periph, CAM_PRIORITY_NORMAL);
3603
3604         csio = &ccb->csio;
3605
3606         cam_fill_csio(csio,
3607                       /* retries */ cd_retry_count,
3608                       /* cbfcnp */ cddone,
3609                       /* flags */ CAM_DIR_NONE,
3610                       /* tag_action */ MSG_SIMPLE_Q_TAG,
3611                       /* data_ptr */ NULL,
3612                       /* dxfer_len */ 0,
3613                       /* sense_len */ SSD_FULL_SIZE,
3614                       sizeof(struct scsi_pause),
3615                       /* timeout */ 50000);
3616
3617         scsi_cmd = (struct scsi_pause *)&csio->cdb_io.cdb_bytes;
3618         bzero (scsi_cmd, sizeof(*scsi_cmd));
3619
3620         scsi_cmd->op_code = PAUSE;
3621         scsi_cmd->resume = go;
3622
3623         error = cdrunccb(ccb, cderror, /*cam_flags*/CAM_RETRY_SELTO,
3624                          /*sense_flags*/SF_RETRY_UA);
3625
3626         xpt_release_ccb(ccb);
3627
3628         return(error);
3629 }
3630
3631 static int
3632 cdstartunit(struct cam_periph *periph, int load)
3633 {
3634         union ccb *ccb;
3635         int error;
3636
3637         error = 0;
3638
3639         ccb = cdgetccb(periph, CAM_PRIORITY_NORMAL);
3640
3641         scsi_start_stop(&ccb->csio,
3642                         /* retries */ cd_retry_count,
3643                         /* cbfcnp */ cddone,
3644                         /* tag_action */ MSG_SIMPLE_Q_TAG,
3645                         /* start */ TRUE,
3646                         /* load_eject */ load,
3647                         /* immediate */ FALSE,
3648                         /* sense_len */ SSD_FULL_SIZE,
3649                         /* timeout */ 50000);
3650
3651         error = cdrunccb(ccb, cderror, /*cam_flags*/CAM_RETRY_SELTO,
3652                          /*sense_flags*/SF_RETRY_UA);
3653
3654         xpt_release_ccb(ccb);
3655
3656         return(error);
3657 }
3658
3659 static int
3660 cdstopunit(struct cam_periph *periph, u_int32_t eject)
3661 {
3662         union ccb *ccb;
3663         int error;
3664
3665         error = 0;
3666
3667         ccb = cdgetccb(periph, CAM_PRIORITY_NORMAL);
3668
3669         scsi_start_stop(&ccb->csio,
3670                         /* retries */ cd_retry_count,
3671                         /* cbfcnp */ cddone,
3672                         /* tag_action */ MSG_SIMPLE_Q_TAG,
3673                         /* start */ FALSE,
3674                         /* load_eject */ eject,
3675                         /* immediate */ FALSE,
3676                         /* sense_len */ SSD_FULL_SIZE,
3677                         /* timeout */ 50000);
3678
3679         error = cdrunccb(ccb, cderror, /*cam_flags*/CAM_RETRY_SELTO,
3680                          /*sense_flags*/SF_RETRY_UA);
3681
3682         xpt_release_ccb(ccb);
3683
3684         return(error);
3685 }
3686
3687 static int
3688 cdsetspeed(struct cam_periph *periph, u_int32_t rdspeed, u_int32_t wrspeed)
3689 {
3690         struct scsi_set_speed *scsi_cmd;
3691         struct ccb_scsiio *csio;
3692         union ccb *ccb;
3693         int error;
3694
3695         error = 0;
3696         ccb = cdgetccb(periph, CAM_PRIORITY_NORMAL);
3697         csio = &ccb->csio;
3698
3699         /* Preserve old behavior: units in multiples of CDROM speed */
3700         if (rdspeed < 177)
3701                 rdspeed *= 177;
3702         if (wrspeed < 177)
3703                 wrspeed *= 177;
3704
3705         cam_fill_csio(csio,
3706                       /* retries */ cd_retry_count,
3707                       /* cbfcnp */ cddone,
3708                       /* flags */ CAM_DIR_NONE,
3709                       /* tag_action */ MSG_SIMPLE_Q_TAG,
3710                       /* data_ptr */ NULL,
3711                       /* dxfer_len */ 0,
3712                       /* sense_len */ SSD_FULL_SIZE,
3713                       sizeof(struct scsi_set_speed),
3714                       /* timeout */ 50000);
3715
3716         scsi_cmd = (struct scsi_set_speed *)&csio->cdb_io.cdb_bytes;
3717         bzero(scsi_cmd, sizeof(*scsi_cmd));
3718
3719         scsi_cmd->opcode = SET_CD_SPEED;
3720         scsi_ulto2b(rdspeed, scsi_cmd->readspeed);
3721         scsi_ulto2b(wrspeed, scsi_cmd->writespeed);
3722
3723         error = cdrunccb(ccb, cderror, /*cam_flags*/CAM_RETRY_SELTO,
3724                          /*sense_flags*/SF_RETRY_UA);
3725
3726         xpt_release_ccb(ccb);
3727
3728         return(error);
3729 }
3730
3731 static int
3732 cdreportkey(struct cam_periph *periph, struct dvd_authinfo *authinfo)
3733 {
3734         union ccb *ccb;
3735         u_int8_t *databuf;
3736         u_int32_t lba;
3737         int error;
3738         int length;
3739
3740         error = 0;
3741         databuf = NULL;
3742         lba = 0;
3743
3744         switch (authinfo->format) {
3745         case DVD_REPORT_AGID:
3746                 length = sizeof(struct scsi_report_key_data_agid);
3747                 break;
3748         case DVD_REPORT_CHALLENGE:
3749                 length = sizeof(struct scsi_report_key_data_challenge);
3750                 break;
3751         case DVD_REPORT_KEY1:
3752                 length = sizeof(struct scsi_report_key_data_key1_key2);
3753                 break;
3754         case DVD_REPORT_TITLE_KEY:
3755                 length = sizeof(struct scsi_report_key_data_title);
3756                 /* The lba field is only set for the title key */
3757                 lba = authinfo->lba;
3758                 break;
3759         case DVD_REPORT_ASF:
3760                 length = sizeof(struct scsi_report_key_data_asf);
3761                 break;
3762         case DVD_REPORT_RPC:
3763                 length = sizeof(struct scsi_report_key_data_rpc);
3764                 break;
3765         case DVD_INVALIDATE_AGID:
3766                 length = 0;
3767                 break;
3768         default:
3769                 return (EINVAL);
3770         }
3771
3772         if (length != 0) {
3773                 databuf = malloc(length, M_DEVBUF, M_WAITOK | M_ZERO);
3774         } else
3775                 databuf = NULL;
3776
3777         cam_periph_lock(periph);
3778         ccb = cdgetccb(periph, CAM_PRIORITY_NORMAL);
3779
3780         scsi_report_key(&ccb->csio,
3781                         /* retries */ cd_retry_count,
3782                         /* cbfcnp */ cddone,
3783                         /* tag_action */ MSG_SIMPLE_Q_TAG,
3784                         /* lba */ lba,
3785                         /* agid */ authinfo->agid,
3786                         /* key_format */ authinfo->format,
3787                         /* data_ptr */ databuf,
3788                         /* dxfer_len */ length,
3789                         /* sense_len */ SSD_FULL_SIZE,
3790                         /* timeout */ 50000);
3791
3792         error = cdrunccb(ccb, cderror, /*cam_flags*/CAM_RETRY_SELTO,
3793                          /*sense_flags*/SF_RETRY_UA);
3794
3795         if (error != 0)
3796                 goto bailout;
3797
3798         if (ccb->csio.resid != 0) {
3799                 xpt_print(periph->path, "warning, residual for report key "
3800                     "command is %d\n", ccb->csio.resid);
3801         }
3802
3803         switch(authinfo->format) {
3804         case DVD_REPORT_AGID: {
3805                 struct scsi_report_key_data_agid *agid_data;
3806
3807                 agid_data = (struct scsi_report_key_data_agid *)databuf;
3808
3809                 authinfo->agid = (agid_data->agid & RKD_AGID_MASK) >>
3810                         RKD_AGID_SHIFT;
3811                 break;
3812         }
3813         case DVD_REPORT_CHALLENGE: {
3814                 struct scsi_report_key_data_challenge *chal_data;
3815
3816                 chal_data = (struct scsi_report_key_data_challenge *)databuf;
3817
3818                 bcopy(chal_data->challenge_key, authinfo->keychal,
3819                       min(sizeof(chal_data->challenge_key),
3820                           sizeof(authinfo->keychal)));
3821                 break;
3822         }
3823         case DVD_REPORT_KEY1: {
3824                 struct scsi_report_key_data_key1_key2 *key1_data;
3825
3826                 key1_data = (struct scsi_report_key_data_key1_key2 *)databuf;
3827
3828                 bcopy(key1_data->key1, authinfo->keychal,
3829                       min(sizeof(key1_data->key1), sizeof(authinfo->keychal)));
3830                 break;
3831         }
3832         case DVD_REPORT_TITLE_KEY: {
3833                 struct scsi_report_key_data_title *title_data;
3834
3835                 title_data = (struct scsi_report_key_data_title *)databuf;
3836
3837                 authinfo->cpm = (title_data->byte0 & RKD_TITLE_CPM) >>
3838                         RKD_TITLE_CPM_SHIFT;
3839                 authinfo->cp_sec = (title_data->byte0 & RKD_TITLE_CP_SEC) >>
3840                         RKD_TITLE_CP_SEC_SHIFT;
3841                 authinfo->cgms = (title_data->byte0 & RKD_TITLE_CMGS_MASK) >>
3842                         RKD_TITLE_CMGS_SHIFT;
3843                 bcopy(title_data->title_key, authinfo->keychal,
3844                       min(sizeof(title_data->title_key),
3845                           sizeof(authinfo->keychal)));
3846                 break;
3847         }
3848         case DVD_REPORT_ASF: {
3849                 struct scsi_report_key_data_asf *asf_data;
3850
3851                 asf_data = (struct scsi_report_key_data_asf *)databuf;
3852
3853                 authinfo->asf = asf_data->success & RKD_ASF_SUCCESS;
3854                 break;
3855         }
3856         case DVD_REPORT_RPC: {
3857                 struct scsi_report_key_data_rpc *rpc_data;
3858
3859                 rpc_data = (struct scsi_report_key_data_rpc *)databuf;
3860
3861                 authinfo->reg_type = (rpc_data->byte4 & RKD_RPC_TYPE_MASK) >>
3862                         RKD_RPC_TYPE_SHIFT;
3863                 authinfo->vend_rsts =
3864                         (rpc_data->byte4 & RKD_RPC_VENDOR_RESET_MASK) >>
3865                         RKD_RPC_VENDOR_RESET_SHIFT;
3866                 authinfo->user_rsts = rpc_data->byte4 & RKD_RPC_USER_RESET_MASK;
3867                 authinfo->region = rpc_data->region_mask;
3868                 authinfo->rpc_scheme = rpc_data->rpc_scheme1;
3869                 break;
3870         }
3871         case DVD_INVALIDATE_AGID:
3872                 break;
3873         default:
3874                 /* This should be impossible, since we checked above */
3875                 error = EINVAL;
3876                 goto bailout;
3877                 break; /* NOTREACHED */
3878         }
3879
3880 bailout:
3881         xpt_release_ccb(ccb);
3882         cam_periph_unlock(periph);
3883
3884         if (databuf != NULL)
3885                 free(databuf, M_DEVBUF);
3886
3887         return(error);
3888 }
3889
3890 static int
3891 cdsendkey(struct cam_periph *periph, struct dvd_authinfo *authinfo)
3892 {
3893         union ccb *ccb;
3894         u_int8_t *databuf;
3895         int length;
3896         int error;
3897
3898         error = 0;
3899         databuf = NULL;
3900
3901         switch(authinfo->format) {
3902         case DVD_SEND_CHALLENGE: {
3903                 struct scsi_report_key_data_challenge *challenge_data;
3904
3905                 length = sizeof(*challenge_data);
3906
3907                 challenge_data = malloc(length, M_DEVBUF, M_WAITOK | M_ZERO);
3908
3909                 databuf = (u_int8_t *)challenge_data;
3910
3911                 scsi_ulto2b(length - sizeof(challenge_data->data_len),
3912                             challenge_data->data_len);
3913
3914                 bcopy(authinfo->keychal, challenge_data->challenge_key,
3915                       min(sizeof(authinfo->keychal),
3916                           sizeof(challenge_data->challenge_key)));
3917                 break;
3918         }
3919         case DVD_SEND_KEY2: {
3920                 struct scsi_report_key_data_key1_key2 *key2_data;
3921
3922                 length = sizeof(*key2_data);
3923
3924                 key2_data = malloc(length, M_DEVBUF, M_WAITOK | M_ZERO);
3925
3926                 databuf = (u_int8_t *)key2_data;
3927
3928                 scsi_ulto2b(length - sizeof(key2_data->data_len),
3929                             key2_data->data_len);
3930
3931                 bcopy(authinfo->keychal, key2_data->key1,
3932                       min(sizeof(authinfo->keychal), sizeof(key2_data->key1)));
3933
3934                 break;
3935         }
3936         case DVD_SEND_RPC: {
3937                 struct scsi_send_key_data_rpc *rpc_data;
3938
3939                 length = sizeof(*rpc_data);
3940
3941                 rpc_data = malloc(length, M_DEVBUF, M_WAITOK | M_ZERO);
3942
3943                 databuf = (u_int8_t *)rpc_data;
3944
3945                 scsi_ulto2b(length - sizeof(rpc_data->data_len),
3946                             rpc_data->data_len);
3947
3948                 rpc_data->region_code = authinfo->region;
3949                 break;
3950         }
3951         default:
3952                 return (EINVAL);
3953         }
3954
3955         cam_periph_lock(periph);
3956         ccb = cdgetccb(periph, CAM_PRIORITY_NORMAL);
3957
3958         scsi_send_key(&ccb->csio,
3959                       /* retries */ cd_retry_count,
3960                       /* cbfcnp */ cddone,
3961                       /* tag_action */ MSG_SIMPLE_Q_TAG,
3962                       /* agid */ authinfo->agid,
3963                       /* key_format */ authinfo->format,
3964                       /* data_ptr */ databuf,
3965                       /* dxfer_len */ length,
3966                       /* sense_len */ SSD_FULL_SIZE,
3967                       /* timeout */ 50000);
3968
3969         error = cdrunccb(ccb, cderror, /*cam_flags*/CAM_RETRY_SELTO,
3970                          /*sense_flags*/SF_RETRY_UA);
3971
3972         xpt_release_ccb(ccb);
3973         cam_periph_unlock(periph);
3974
3975         if (databuf != NULL)
3976                 free(databuf, M_DEVBUF);
3977
3978         return(error);
3979 }
3980
3981 static int
3982 cdreaddvdstructure(struct cam_periph *periph, struct dvd_struct *dvdstruct)
3983 {
3984         union ccb *ccb;
3985         u_int8_t *databuf;
3986         u_int32_t address;
3987         int error;
3988         int length;
3989
3990         error = 0;
3991         databuf = NULL;
3992         /* The address is reserved for many of the formats */
3993         address = 0;
3994
3995         switch(dvdstruct->format) {
3996         case DVD_STRUCT_PHYSICAL:
3997                 length = sizeof(struct scsi_read_dvd_struct_data_physical);
3998                 break;
3999         case DVD_STRUCT_COPYRIGHT:
4000                 length = sizeof(struct scsi_read_dvd_struct_data_copyright);
4001                 break;
4002         case DVD_STRUCT_DISCKEY:
4003                 length = sizeof(struct scsi_read_dvd_struct_data_disc_key);
4004                 break;
4005         case DVD_STRUCT_BCA:
4006                 length = sizeof(struct scsi_read_dvd_struct_data_bca);
4007                 break;
4008         case DVD_STRUCT_MANUFACT:
4009                 length = sizeof(struct scsi_read_dvd_struct_data_manufacturer);
4010                 break;
4011         case DVD_STRUCT_CMI:
4012                 return (ENODEV);
4013         case DVD_STRUCT_PROTDISCID:
4014                 length = sizeof(struct scsi_read_dvd_struct_data_prot_discid);
4015                 break;
4016         case DVD_STRUCT_DISCKEYBLOCK:
4017                 length = sizeof(struct scsi_read_dvd_struct_data_disc_key_blk);
4018                 break;
4019         case DVD_STRUCT_DDS:
4020                 length = sizeof(struct scsi_read_dvd_struct_data_dds);
4021                 break;
4022         case DVD_STRUCT_MEDIUM_STAT:
4023                 length = sizeof(struct scsi_read_dvd_struct_data_medium_status);
4024                 break;
4025         case DVD_STRUCT_SPARE_AREA:
4026                 length = sizeof(struct scsi_read_dvd_struct_data_spare_area);
4027                 break;
4028         case DVD_STRUCT_RMD_LAST:
4029                 return (ENODEV);
4030         case DVD_STRUCT_RMD_RMA:
4031                 return (ENODEV);
4032         case DVD_STRUCT_PRERECORDED:
4033                 length = sizeof(struct scsi_read_dvd_struct_data_leadin);
4034                 break;
4035         case DVD_STRUCT_UNIQUEID:
4036                 length = sizeof(struct scsi_read_dvd_struct_data_disc_id);
4037                 break;
4038         case DVD_STRUCT_DCB:
4039                 return (ENODEV);
4040         case DVD_STRUCT_LIST:
4041                 /*
4042                  * This is the maximum allocation length for the READ DVD
4043                  * STRUCTURE command.  There's nothing in the MMC3 spec
4044                  * that indicates a limit in the amount of data that can
4045                  * be returned from this call, other than the limits
4046                  * imposed by the 2-byte length variables.
4047                  */
4048                 length = 65535;
4049                 break;
4050         default:
4051                 return (EINVAL);
4052         }
4053
4054         if (length != 0) {
4055                 databuf = malloc(length, M_DEVBUF, M_WAITOK | M_ZERO);
4056         } else
4057                 databuf = NULL;
4058
4059         cam_periph_lock(periph);
4060         ccb = cdgetccb(periph, CAM_PRIORITY_NORMAL);
4061
4062         scsi_read_dvd_structure(&ccb->csio,
4063                                 /* retries */ cd_retry_count,
4064                                 /* cbfcnp */ cddone,
4065                                 /* tag_action */ MSG_SIMPLE_Q_TAG,
4066                                 /* lba */ address,
4067                                 /* layer_number */ dvdstruct->layer_num,
4068                                 /* key_format */ dvdstruct->format,
4069                                 /* agid */ dvdstruct->agid,
4070                                 /* data_ptr */ databuf,
4071                                 /* dxfer_len */ length,
4072                                 /* sense_len */ SSD_FULL_SIZE,
4073                                 /* timeout */ 50000);
4074
4075         error = cdrunccb(ccb, cderror, /*cam_flags*/CAM_RETRY_SELTO,
4076                          /*sense_flags*/SF_RETRY_UA);
4077
4078         if (error != 0)
4079                 goto bailout;
4080
4081         switch(dvdstruct->format) {
4082         case DVD_STRUCT_PHYSICAL: {
4083                 struct scsi_read_dvd_struct_data_layer_desc *inlayer;
4084                 struct dvd_layer *outlayer;
4085                 struct scsi_read_dvd_struct_data_physical *phys_data;
4086
4087                 phys_data =
4088                         (struct scsi_read_dvd_struct_data_physical *)databuf;
4089                 inlayer = &phys_data->layer_desc;
4090                 outlayer = (struct dvd_layer *)&dvdstruct->data;
4091
4092                 dvdstruct->length = sizeof(*inlayer);
4093
4094                 outlayer->book_type = (inlayer->book_type_version &
4095                         RDSD_BOOK_TYPE_MASK) >> RDSD_BOOK_TYPE_SHIFT;
4096                 outlayer->book_version = (inlayer->book_type_version &
4097                         RDSD_BOOK_VERSION_MASK);
4098                 outlayer->disc_size = (inlayer->disc_size_max_rate &
4099                         RDSD_DISC_SIZE_MASK) >> RDSD_DISC_SIZE_SHIFT;
4100                 outlayer->max_rate = (inlayer->disc_size_max_rate &
4101                         RDSD_MAX_RATE_MASK);
4102                 outlayer->nlayers = (inlayer->layer_info &
4103                         RDSD_NUM_LAYERS_MASK) >> RDSD_NUM_LAYERS_SHIFT;
4104                 outlayer->track_path = (inlayer->layer_info &
4105                         RDSD_TRACK_PATH_MASK) >> RDSD_TRACK_PATH_SHIFT;
4106                 outlayer->layer_type = (inlayer->layer_info &
4107                         RDSD_LAYER_TYPE_MASK);
4108                 outlayer->linear_density = (inlayer->density &
4109                         RDSD_LIN_DENSITY_MASK) >> RDSD_LIN_DENSITY_SHIFT;
4110                 outlayer->track_density = (inlayer->density &
4111                         RDSD_TRACK_DENSITY_MASK);
4112                 outlayer->bca = (inlayer->bca & RDSD_BCA_MASK) >>
4113                         RDSD_BCA_SHIFT;
4114                 outlayer->start_sector = scsi_3btoul(inlayer->main_data_start);
4115                 outlayer->end_sector = scsi_3btoul(inlayer->main_data_end);
4116                 outlayer->end_sector_l0 =
4117                         scsi_3btoul(inlayer->end_sector_layer0);
4118                 break;
4119         }
4120         case DVD_STRUCT_COPYRIGHT: {
4121                 struct scsi_read_dvd_struct_data_copyright *copy_data;
4122
4123                 copy_data = (struct scsi_read_dvd_struct_data_copyright *)
4124                         databuf;
4125
4126                 dvdstruct->cpst = copy_data->cps_type;
4127                 dvdstruct->rmi = copy_data->region_info;
4128                 dvdstruct->length = 0;
4129
4130                 break;
4131         }
4132         default:
4133                 /*
4134                  * Tell the user what the overall length is, no matter
4135                  * what we can actually fit in the data buffer.
4136                  */
4137                 dvdstruct->length = length - ccb->csio.resid -
4138                         sizeof(struct scsi_read_dvd_struct_data_header);
4139
4140                 /*
4141                  * But only actually copy out the smaller of what we read
4142                  * in or what the structure can take.
4143                  */
4144                 bcopy(databuf + sizeof(struct scsi_read_dvd_struct_data_header),
4145                       dvdstruct->data,
4146                       min(sizeof(dvdstruct->data), dvdstruct->length));
4147                 break;
4148         }
4149
4150 bailout:
4151         xpt_release_ccb(ccb);
4152         cam_periph_unlock(periph);
4153
4154         if (databuf != NULL)
4155                 free(databuf, M_DEVBUF);
4156
4157         return(error);
4158 }
4159
4160 void
4161 scsi_report_key(struct ccb_scsiio *csio, u_int32_t retries,
4162                 void (*cbfcnp)(struct cam_periph *, union ccb *),
4163                 u_int8_t tag_action, u_int32_t lba, u_int8_t agid,
4164                 u_int8_t key_format, u_int8_t *data_ptr, u_int32_t dxfer_len,
4165                 u_int8_t sense_len, u_int32_t timeout)
4166 {
4167         struct scsi_report_key *scsi_cmd;
4168
4169         scsi_cmd = (struct scsi_report_key *)&csio->cdb_io.cdb_bytes;
4170         bzero(scsi_cmd, sizeof(*scsi_cmd));
4171         scsi_cmd->opcode = REPORT_KEY;
4172         scsi_ulto4b(lba, scsi_cmd->lba);
4173         scsi_ulto2b(dxfer_len, scsi_cmd->alloc_len);
4174         scsi_cmd->agid_keyformat = (agid << RK_KF_AGID_SHIFT) |
4175                 (key_format & RK_KF_KEYFORMAT_MASK);
4176
4177         cam_fill_csio(csio,
4178                       retries,
4179                       cbfcnp,
4180                       /*flags*/ (dxfer_len == 0) ? CAM_DIR_NONE : CAM_DIR_IN,
4181                       tag_action,
4182                       /*data_ptr*/ data_ptr,
4183                       /*dxfer_len*/ dxfer_len,
4184                       sense_len,
4185                       sizeof(*scsi_cmd),
4186                       timeout);
4187 }
4188
4189 void
4190 scsi_send_key(struct ccb_scsiio *csio, u_int32_t retries,
4191               void (*cbfcnp)(struct cam_periph *, union ccb *),
4192               u_int8_t tag_action, u_int8_t agid, u_int8_t key_format,
4193               u_int8_t *data_ptr, u_int32_t dxfer_len, u_int8_t sense_len,
4194               u_int32_t timeout)
4195 {
4196         struct scsi_send_key *scsi_cmd;
4197
4198         scsi_cmd = (struct scsi_send_key *)&csio->cdb_io.cdb_bytes;
4199         bzero(scsi_cmd, sizeof(*scsi_cmd));
4200         scsi_cmd->opcode = SEND_KEY;
4201
4202         scsi_ulto2b(dxfer_len, scsi_cmd->param_len);
4203         scsi_cmd->agid_keyformat = (agid << RK_KF_AGID_SHIFT) |
4204                 (key_format & RK_KF_KEYFORMAT_MASK);
4205
4206         cam_fill_csio(csio,
4207                       retries,
4208                       cbfcnp,
4209                       /*flags*/ CAM_DIR_OUT,
4210                       tag_action,
4211                       /*data_ptr*/ data_ptr,
4212                       /*dxfer_len*/ dxfer_len,
4213                       sense_len,
4214                       sizeof(*scsi_cmd),
4215                       timeout);
4216 }
4217
4218
4219 void
4220 scsi_read_dvd_structure(struct ccb_scsiio *csio, u_int32_t retries,
4221                         void (*cbfcnp)(struct cam_periph *, union ccb *),
4222                         u_int8_t tag_action, u_int32_t address,
4223                         u_int8_t layer_number, u_int8_t format, u_int8_t agid,
4224                         u_int8_t *data_ptr, u_int32_t dxfer_len,
4225                         u_int8_t sense_len, u_int32_t timeout)
4226 {
4227         struct scsi_read_dvd_structure *scsi_cmd;
4228
4229         scsi_cmd = (struct scsi_read_dvd_structure *)&csio->cdb_io.cdb_bytes;
4230         bzero(scsi_cmd, sizeof(*scsi_cmd));
4231         scsi_cmd->opcode = READ_DVD_STRUCTURE;
4232
4233         scsi_ulto4b(address, scsi_cmd->address);
4234         scsi_cmd->layer_number = layer_number;
4235         scsi_cmd->format = format;
4236         scsi_ulto2b(dxfer_len, scsi_cmd->alloc_len);
4237         /* The AGID is the top two bits of this byte */
4238         scsi_cmd->agid = agid << 6;
4239
4240         cam_fill_csio(csio,
4241                       retries,
4242                       cbfcnp,
4243                       /*flags*/ CAM_DIR_IN,
4244                       tag_action,
4245                       /*data_ptr*/ data_ptr,
4246                       /*dxfer_len*/ dxfer_len,
4247                       sense_len,
4248                       sizeof(*scsi_cmd),
4249                       timeout);
4250 }