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