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          * Load the user's default, if any.
 692          */
 693         snprintf(tmpstr, sizeof(tmpstr), "kern.cam.cd.%d.minimum_cmd_size",
 694                  periph->unit_number);
 695         TUNABLE_INT_FETCH(tmpstr, &softc->minimum_command_size);
 696
 697         /* 6 and 10 are the only permissible values here. */
 698         if (softc->minimum_command_size < 6)
 699                 softc->minimum_command_size = 6;
 700         else if (softc->minimum_command_size > 6)
 701                 softc->minimum_command_size = 10;
 702
 703         /*
 704          * We need to register the statistics structure for this device,
 705          * but we don't have the blocksize yet for it.  So, we register
 706          * the structure and indicate that we don't have the blocksize
 707          * yet.  Unlike other SCSI peripheral drivers, we explicitly set
 708          * the device type here to be CDROM, rather than just ORing in
 709          * the device type.  This is because this driver can attach to either
 710          * CDROM or WORM devices, and we want this peripheral driver to
 711          * show up in the devstat list as a CD peripheral driver, not a
 712          * WORM peripheral driver.  WORM drives will also have the WORM
 713          * driver attached to them.
 714          */
 715         cam_periph_unlock(periph);
 716         softc->disk = disk_alloc();
 717         softc->disk->d_devstat = devstat_new_entry("cd",
 718                           periph->unit_number, 0,
 719                           DEVSTAT_BS_UNAVAILABLE,
 720                           DEVSTAT_TYPE_CDROM | DEVSTAT_TYPE_IF_SCSI,
 721                           DEVSTAT_PRIORITY_CD);
 722         softc->disk->d_open = cdopen;
 723         softc->disk->d_close = cdclose;
 724         softc->disk->d_strategy = cdstrategy;
 725         softc->disk->d_ioctl = cdioctl;
 726         softc->disk->d_name = "cd";
 727         softc->disk->d_unit = periph->unit_number;
 728         softc->disk->d_drv1 = periph;
 729         if (cpi.maxio == 0)
 730                 softc->disk->d_maxsize = DFLTPHYS;      /* traditional default */
 731         else if (cpi.maxio > MAXPHYS)
 732                 softc->disk->d_maxsize = MAXPHYS;       /* for safety */
 733         else
 734                 softc->disk->d_maxsize = cpi.maxio;
 735         softc->disk->d_flags = 0;
 736         disk_create(softc->disk, DISK_VERSION);
 737         cam_periph_lock(periph);
 738
 739         /*
 740          * Add an async callback so that we get
 741          * notified if this device goes away.
 742          */
 743         xpt_register_async(AC_SENT_BDR | AC_BUS_RESET | AC_LOST_DEVICE,
 744                            cdasync, periph, periph->path);
 745
 746         /*
 747          * If the target lun is greater than 0, we most likely have a CD
 748          * changer device.  Check the quirk entries as well, though, just
 749          * in case someone has a CD tower with one lun per drive or
 750          * something like that.  Also, if we know up front that a
 751          * particular device is a changer, we can mark it as such starting
 752          * with lun 0, instead of lun 1.  It shouldn't be necessary to have
 753          * a quirk entry to define something as a changer, however.
 754          */
 755         if (((cgd->ccb_h.target_lun > 0)
 756           && ((softc->quirks & CD_Q_NO_CHANGER) == 0))
 757          || ((softc->quirks & CD_Q_CHANGER) != 0)) {
 758                 struct cdchanger *nchanger;
 759                 struct cam_periph *nperiph;
 760                 struct cam_path *path;
 761                 cam_status status;
 762                 int found;
 763
 764                 /* Set the changer flag in the current device's softc */
 765                 softc->flags |= CD_FLAG_CHANGER;
 766
 767                 /*
 768                  * Now, look around for an existing changer device with the
 769                  * same path and target ID as the current device.
 770                  */
 771                 mtx_lock(&changerq_mtx);
 772                 for (found = 0,
 773                      nchanger = (struct cdchanger *)STAILQ_FIRST(&changerq);
 774                      nchanger != NULL;
 775                      nchanger = STAILQ_NEXT(nchanger, changer_links)){
 776                         if ((nchanger->path_id == cgd->ccb_h.path_id)
 777                          && (nchanger->target_id == cgd->ccb_h.target_id)) {
 778                                 found = 1;
 779                                 break;
 780                         }
 781                 }
 782                 mtx_unlock(&changerq_mtx);
 783
 784                 /*
 785                  * If we found a matching entry, just add this device to
 786                  * the list of devices on this changer.
 787                  */
 788                 if (found == 1) {
 789                         struct chdevlist *chlunhead;
 790
 791                         chlunhead = &nchanger->chluns;
 792
 793                         /*
 794                          * XXX KDM look at consolidating this code with the
 795                          * code below in a separate function.
 796                          */
 797
 798                         /*
 799                          * Create a path with lun id 0, and see if we can
 800                          * find a matching device
 801                          */
 802                         status = xpt_create_path(&path, /*periph*/ periph,
 803                                                  cgd->ccb_h.path_id,
 804                                                  cgd->ccb_h.target_id, 0);
 805
 806                         if ((status == CAM_REQ_CMP)
 807                          && ((nperiph = cam_periph_find(path, "cd")) != NULL)){
 808                                 struct cd_softc *nsoftc;
 809
 810                                 nsoftc = (struct cd_softc *)nperiph->softc;
 811
 812                                 if ((nsoftc->flags & CD_FLAG_CHANGER) == 0){
 813                                         nsoftc->flags |= CD_FLAG_CHANGER;
 814                                         nchanger->num_devices++;
 815                                         if (camq_resize(&nchanger->devq,
 816                                            nchanger->num_devices)!=CAM_REQ_CMP){
 817                                                 printf("cdregister: "
 818                                                        "camq_resize "
 819                                                        "failed, changer "
 820                                                        "support may "
 821                                                        "be messed up\n");
 822                                         }
 823                                         nsoftc->changer = nchanger;
 824                                         nsoftc->pinfo.index =CAM_UNQUEUED_INDEX;
 825
 826                                         STAILQ_INSERT_TAIL(&nchanger->chluns,
 827                                                           nsoftc,changer_links);
 828                                 }
 829                                 xpt_free_path(path);
 830                         } else if (status == CAM_REQ_CMP)
 831                                 xpt_free_path(path);
 832                         else {
 833                                 printf("cdregister: unable to allocate path\n"
 834                                        "cdregister: changer support may be "
 835                                        "broken\n");
 836                         }
 837
 838                         nchanger->num_devices++;
 839
 840                         softc->changer = nchanger;
 841                         softc->pinfo.index = CAM_UNQUEUED_INDEX;
 842
 843                         if (camq_resize(&nchanger->devq,
 844                             nchanger->num_devices) != CAM_REQ_CMP) {
 845                                 printf("cdregister: camq_resize "
 846                                        "failed, changer support may "
 847                                        "be messed up\n");
 848                         }
 849
 850                         STAILQ_INSERT_TAIL(chlunhead, softc, changer_links);
 851                 }
 852                 /*
 853                  * In this case, we don't already have an entry for this
 854                  * particular changer, so we need to create one, add it to
 855                  * the queue, and queue this device on the list for this
 856                  * changer.  Before we queue this device, however, we need
 857                  * to search for lun id 0 on this target, and add it to the
 858                  * queue first, if it exists.  (and if it hasn't already
 859                  * been marked as part of the changer.)
 860                  */
 861                 else {
 862                         nchanger = malloc(sizeof(struct cdchanger),
 863                                 M_DEVBUF, M_NOWAIT | M_ZERO);
 864                         if (nchanger == NULL) {
 865                                 softc->flags &= ~CD_FLAG_CHANGER;
 866                                 printf("cdregister: unable to malloc "
 867                                        "changer structure\ncdregister: "
 868                                        "changer support disabled\n");
 869
 870                                 /*
 871                                  * Yes, gotos can be gross but in this case
 872                                  * I think it's justified..
 873                                  */
 874                                 goto cdregisterexit;
 875                         }
 876                         if (camq_init(&nchanger->devq, 1) != 0) {
 877                                 softc->flags &= ~CD_FLAG_CHANGER;
 878                                 printf("cdregister: changer support "
 879                                        "disabled\n");
 880                                 goto cdregisterexit;
 881                         }
 882
 883                         nchanger->path_id = cgd->ccb_h.path_id;
 884                         nchanger->target_id = cgd->ccb_h.target_id;
 885
 886                         /* this is superfluous, but it makes things clearer */
 887                         nchanger->num_devices = 0;
 888
 889                         STAILQ_INIT(&nchanger->chluns);
 890
 891                         callout_init_mtx(&nchanger->long_handle,
 892                             periph->sim->mtx, 0);
 893                         callout_init_mtx(&nchanger->short_handle,
 894                             periph->sim->mtx, 0);
 895
 896                         mtx_lock(&changerq_mtx);
 897                         num_changers++;
 898                         STAILQ_INSERT_TAIL(&changerq, nchanger,
 899                                            changer_links);
 900                         mtx_unlock(&changerq_mtx);
 901
 902                         /*
 903                          * Create a path with lun id 0, and see if we can
 904                          * find a matching device
 905                          */
 906                         status = xpt_create_path(&path, /*periph*/ periph,
 907                                                  cgd->ccb_h.path_id,
 908                                                  cgd->ccb_h.target_id, 0);
 909
 910                         /*
 911                          * If we were able to allocate the path, and if we
 912                          * find a matching device and it isn't already
 913                          * marked as part of a changer, then we add it to
 914                          * the current changer.
 915                          */
 916                         if ((status == CAM_REQ_CMP)
 917                          && ((nperiph = cam_periph_find(path, "cd")) != NULL)
 918                          && ((((struct cd_softc *)periph->softc)->flags &
 919                                CD_FLAG_CHANGER) == 0)) {
 920                                 struct cd_softc *nsoftc;
 921
 922                                 nsoftc = (struct cd_softc *)nperiph->softc;
 923
 924                                 nsoftc->flags |= CD_FLAG_CHANGER;
 925                                 nchanger->num_devices++;
 926                                 if (camq_resize(&nchanger->devq,
 927                                     nchanger->num_devices) != CAM_REQ_CMP) {
 928                                         printf("cdregister: camq_resize "
 929                                                "failed, changer support may "
 930                                                "be messed up\n");
 931                                 }
 932                                 nsoftc->changer = nchanger;
 933                                 nsoftc->pinfo.index = CAM_UNQUEUED_INDEX;
 934
 935                                 STAILQ_INSERT_TAIL(&nchanger->chluns,
 936                                                    nsoftc, changer_links);
 937                                 xpt_free_path(path);
 938                         } else if (status == CAM_REQ_CMP)
 939                                 xpt_free_path(path);
 940                         else {
 941                                 printf("cdregister: unable to allocate path\n"
 942                                        "cdregister: changer support may be "
 943                                        "broken\n");
 944                         }
 945
 946                         softc->changer = nchanger;
 947                         softc->pinfo.index = CAM_UNQUEUED_INDEX;
 948                         nchanger->num_devices++;
 949                         if (camq_resize(&nchanger->devq,
 950                             nchanger->num_devices) != CAM_REQ_CMP) {
 951                                 printf("cdregister: camq_resize "
 952                                        "failed, changer support may "
 953                                        "be messed up\n");
 954                         }
 955                         STAILQ_INSERT_TAIL(&nchanger->chluns, softc,
 956                                            changer_links);
 957                 }
 958         }
 959
 960 cdregisterexit:
 961
 962         /*
 963          * Refcount and block open attempts until we are setup
 964          * Can't block
 965          */
 966         (void)cam_periph_hold(periph, PRIBIO);
 967
 968         if ((softc->flags & CD_FLAG_CHANGER) == 0)
 969                 xpt_schedule(periph, CAM_PRIORITY_DEV);
 970         else
 971                 cdschedule(periph, CAM_PRIORITY_DEV);
 972
 973         return(CAM_REQ_CMP);
 974 }
 975
 976 static int
 977 cdopen(struct disk *dp)
 978 {
 979         struct cam_periph *periph;
 980         struct cd_softc *softc;
 981         int error;
 982
 983         periph = (struct cam_periph *)dp->d_drv1;
 984         if (periph == NULL)
 985                 return (ENXIO);
 986
 987         softc = (struct cd_softc *)periph->softc;
 988
 989         if (cam_periph_acquire(periph) != CAM_REQ_CMP)
 990                 return(ENXIO);
 991
 992         cam_periph_lock(periph);
 993
 994         if (softc->flags & CD_FLAG_INVALID) {
 995                 cam_periph_unlock(periph);
 996                 cam_periph_release(periph);
 997                 return(ENXIO);
 998         }
 999
1000         if ((error = cam_periph_hold(periph, PRIBIO | PCATCH)) != 0) {
1001                 cam_periph_unlock(periph);
1002                 cam_periph_release(periph);
1003                 return (error);
1004         }
1005
1006         /*
1007          * Check for media, and set the appropriate flags.  We don't bail
1008          * if we don't have media, but then we don't allow anything but the
1009          * CDIOCEJECT/CDIOCCLOSE ioctls if there is no media.
1010          */
1011         cdcheckmedia(periph);
1012
1013         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("leaving cdopen\n"));
1014         cam_periph_unhold(periph);
1015
1016         /* Closes aren't symmetrical with opens, so fix up the refcounting. */
1017         if ((softc->flags & CD_FLAG_OPEN) == 0) {
1018                 softc->flags |= CD_FLAG_OPEN;
1019                 cam_periph_unlock(periph);
1020         } else {
1021                 cam_periph_unlock(periph);
1022                 cam_periph_release(periph);
1023         }
1024
1025         return (0);
1026 }
1027
1028 static int
1029 cdclose(struct disk *dp)
1030 {
1031         struct  cam_periph *periph;
1032         struct  cd_softc *softc;
1033
1034         periph = (struct cam_periph *)dp->d_drv1;
1035         if (periph == NULL)
1036                 return (ENXIO);
1037
1038         softc = (struct cd_softc *)periph->softc;
1039
1040         cam_periph_lock(periph);
1041         cam_periph_hold(periph, PRIBIO);
1042
1043         if ((softc->flags & CD_FLAG_DISC_REMOVABLE) != 0)
1044                 cdprevent(periph, PR_ALLOW);
1045
1046         /*
1047          * Since we're closing this CD, mark the blocksize as unavailable.
1048          * It will be marked as available when the CD is opened again.
1049          */
1050         softc->disk->d_devstat->flags |= DEVSTAT_BS_UNAVAILABLE;
1051
1052         /*
1053          * We'll check the media and toc again at the next open().
1054          */
1055         softc->flags &= ~(CD_FLAG_VALID_MEDIA|CD_FLAG_VALID_TOC|CD_FLAG_OPEN);
1056
1057         cam_periph_unhold(periph);
1058         cam_periph_unlock(periph);
1059         cam_periph_release(periph);
1060
1061         return (0);
1062 }
1063
1064 static void
1065 cdshorttimeout(void *arg)
1066 {
1067         struct cdchanger *changer;
1068
1069         changer = (struct cdchanger *)arg;
1070
1071         /* Always clear the short timeout flag, since that's what we're in */
1072         changer->flags &= ~CHANGER_SHORT_TMOUT_SCHED;
1073
1074         /*
1075          * Check to see if there is any more pending or outstanding I/O for
1076          * this device.  If not, move it out of the active slot.
1077          */
1078         if ((bioq_first(&changer->cur_device->bio_queue) == NULL)
1079          && (changer->cur_device->outstanding_cmds == 0)) {
1080                 changer->flags |= CHANGER_MANUAL_CALL;
1081                 cdrunchangerqueue(changer);
1082         }
1083 }
1084
1085 /*
1086  * This is a wrapper for xpt_schedule.  It only applies to changers.
1087  */
1088 static void
1089 cdschedule(struct cam_periph *periph, int priority)
1090 {
1091         struct cd_softc *softc;
1092
1093         softc = (struct cd_softc *)periph->softc;
1094
1095         /*
1096          * If this device isn't currently queued, and if it isn't
1097          * the active device, then we queue this device and run the
1098          * changer queue if there is no timeout scheduled to do it.
1099          * If this device is the active device, just schedule it
1100          * to run again.  If this device is queued, there should be
1101          * a timeout in place already that will make sure it runs.
1102          */
1103         if ((softc->pinfo.index == CAM_UNQUEUED_INDEX)
1104          && ((softc->flags & CD_FLAG_ACTIVE) == 0)) {
1105                 /*
1106                  * We don't do anything with the priority here.
1107                  * This is strictly a fifo queue.
1108                  */
1109                 softc->pinfo.priority = CAM_PRIORITY_NORMAL;
1110                 softc->pinfo.generation = ++softc->changer->devq.generation;
1111                 camq_insert(&softc->changer->devq, (cam_pinfo *)softc);
1112
1113                 /*
1114                  * Since we just put a device in the changer queue,
1115                  * check and see if there is a timeout scheduled for
1116                  * this changer.  If so, let the timeout handle
1117                  * switching this device into the active slot.  If
1118                  * not, manually call the timeout routine to
1119                  * bootstrap things.
1120                  */
1121                 if (((softc->changer->flags & CHANGER_TIMEOUT_SCHED)==0)
1122                  && ((softc->changer->flags & CHANGER_NEED_TIMEOUT)==0)
1123                  && ((softc->changer->flags & CHANGER_SHORT_TMOUT_SCHED)==0)){
1124                         softc->changer->flags |= CHANGER_MANUAL_CALL;
1125                         cdrunchangerqueue(softc->changer);
1126                 }
1127         } else if ((softc->flags & CD_FLAG_ACTIVE)
1128                 && ((softc->flags & CD_FLAG_SCHED_ON_COMP) == 0))
1129                 xpt_schedule(periph, priority);
1130 }
1131
1132 static void
1133 cdrunchangerqueue(void *arg)
1134 {
1135         struct cd_softc *softc;
1136         struct cdchanger *changer;
1137         int called_from_timeout;
1138
1139         changer = (struct cdchanger *)arg;
1140
1141         /*
1142          * If we have NOT been called from cdstrategy() or cddone(), and
1143          * instead from a timeout routine, go ahead and clear the
1144          * timeout flag.
1145          */
1146         if ((changer->flags & CHANGER_MANUAL_CALL) == 0) {
1147                 changer->flags &= ~CHANGER_TIMEOUT_SCHED;
1148                 called_from_timeout = 1;
1149         } else
1150                 called_from_timeout = 0;
1151
1152         /* Always clear the manual call flag */
1153         changer->flags &= ~CHANGER_MANUAL_CALL;
1154
1155         /* nothing to do if the queue is empty */
1156         if (changer->devq.entries <= 0) {
1157                 return;
1158         }
1159
1160         /*
1161          * If the changer queue is frozen, that means we have an active
1162          * device.
1163          */
1164         if (changer->devq.qfrozen_cnt[0] > 0) {
1165
1166                 /*
1167                  * We always need to reset the frozen count and clear the
1168                  * active flag.
1169                  */
1170                 changer->devq.qfrozen_cnt[0]--;
1171                 changer->cur_device->flags &= ~CD_FLAG_ACTIVE;
1172                 changer->cur_device->flags &= ~CD_FLAG_SCHED_ON_COMP;
1173
1174                 if (changer->cur_device->outstanding_cmds > 0) {
1175                         changer->cur_device->flags |= CD_FLAG_SCHED_ON_COMP;
1176                         changer->cur_device->bufs_left =
1177                                 changer->cur_device->outstanding_cmds;
1178                         if (called_from_timeout) {
1179                                 callout_reset(&changer->long_handle,
1180                                     changer_max_busy_seconds * hz,
1181                                     cdrunchangerqueue, changer);
1182                                 changer->flags |= CHANGER_TIMEOUT_SCHED;
1183                         }
1184                         return;
1185                 }
1186
1187                 /*
1188                  * Check to see whether the current device has any I/O left
1189                  * to do.  If so, requeue it at the end of the queue.  If
1190                  * not, there is no need to requeue it.
1191                  */
1192                 if (bioq_first(&changer->cur_device->bio_queue) != NULL) {
1193
1194                         changer->cur_device->pinfo.generation =
1195                                 ++changer->devq.generation;
1196                         camq_insert(&changer->devq,
1197                                 (cam_pinfo *)changer->cur_device);
1198                 }
1199         }
1200
1201         softc = (struct cd_softc *)camq_remove(&changer->devq, CAMQ_HEAD);
1202
1203         changer->cur_device = softc;
1204
1205         changer->devq.qfrozen_cnt[0]++;
1206         softc->flags |= CD_FLAG_ACTIVE;
1207
1208         /* Just in case this device is waiting */
1209         wakeup(&softc->changer);
1210         xpt_schedule(softc->periph, CAM_PRIORITY_NORMAL);
1211
1212         /*
1213          * Get rid of any pending timeouts, and set a flag to schedule new
1214          * ones so this device gets its full time quantum.
1215          */
1216         if (changer->flags & CHANGER_TIMEOUT_SCHED) {
1217                 callout_stop(&changer->long_handle);
1218                 changer->flags &= ~CHANGER_TIMEOUT_SCHED;
1219         }
1220
1221         if (changer->flags & CHANGER_SHORT_TMOUT_SCHED) {
1222                 callout_stop(&changer->short_handle);
1223                 changer->flags &= ~CHANGER_SHORT_TMOUT_SCHED;
1224         }
1225
1226         /*
1227          * We need to schedule timeouts, but we only do this after the
1228          * first transaction has completed.  This eliminates the changer
1229          * switch time.
1230          */
1231         changer->flags |= CHANGER_NEED_TIMEOUT;
1232 }
1233
1234 static void
1235 cdchangerschedule(struct cd_softc *softc)
1236 {
1237         struct cdchanger *changer;
1238
1239         changer = softc->changer;
1240
1241         /*
1242          * If this is a changer, and this is the current device,
1243          * and this device has at least the minimum time quantum to
1244          * run, see if we can switch it out.
1245          */
1246         if ((softc->flags & CD_FLAG_ACTIVE)
1247          && ((changer->flags & CHANGER_SHORT_TMOUT_SCHED) == 0)
1248          && ((changer->flags & CHANGER_NEED_TIMEOUT) == 0)) {
1249                 /*
1250                  * We try three things here.  The first is that we
1251                  * check to see whether the schedule on completion
1252                  * flag is set.  If it is, we decrement the number
1253                  * of buffers left, and if it's zero, we reschedule.
1254                  * Next, we check to see whether the pending buffer
1255                  * queue is empty and whether there are no
1256                  * outstanding transactions.  If so, we reschedule.
1257                  * Next, we see if the pending buffer queue is empty.
1258                  * If it is, we set the number of buffers left to
1259                  * the current active buffer count and set the
1260                  * schedule on complete flag.
1261                  */
1262                 if (softc->flags & CD_FLAG_SCHED_ON_COMP) {
1263                         if (--softc->bufs_left == 0) {
1264                                 softc->changer->flags |=
1265                                         CHANGER_MANUAL_CALL;
1266                                 softc->flags &= ~CD_FLAG_SCHED_ON_COMP;
1267                                 cdrunchangerqueue(softc->changer);
1268                         }
1269                 } else if ((bioq_first(&softc->bio_queue) == NULL)
1270                         && (softc->outstanding_cmds == 0)) {
1271                         softc->changer->flags |= CHANGER_MANUAL_CALL;
1272                         cdrunchangerqueue(softc->changer);
1273                 }
1274         } else if ((softc->changer->flags & CHANGER_NEED_TIMEOUT)
1275                 && (softc->flags & CD_FLAG_ACTIVE)) {
1276
1277                 /*
1278                  * Now that the first transaction to this
1279                  * particular device has completed, we can go ahead
1280                  * and schedule our timeouts.
1281                  */
1282                 if ((changer->flags & CHANGER_TIMEOUT_SCHED) == 0) {
1283                         callout_reset(&changer->long_handle,
1284                             changer_max_busy_seconds * hz,
1285                             cdrunchangerqueue, changer);
1286                         changer->flags |= CHANGER_TIMEOUT_SCHED;
1287                 } else
1288                         printf("cdchangerschedule: already have a long"
1289                                " timeout!\n");
1290
1291                 if ((changer->flags & CHANGER_SHORT_TMOUT_SCHED) == 0) {
1292                         callout_reset(&changer->short_handle,
1293                             changer_min_busy_seconds * hz,
1294                             cdshorttimeout, changer);
1295                         changer->flags |= CHANGER_SHORT_TMOUT_SCHED;
1296                 } else
1297                         printf("cdchangerschedule: already have a short "
1298                                "timeout!\n");
1299
1300                 /*
1301                  * We just scheduled timeouts, no need to schedule
1302                  * more.
1303                  */
1304                 changer->flags &= ~CHANGER_NEED_TIMEOUT;
1305
1306         }
1307 }
1308
1309 static int
1310 cdrunccb(union ccb *ccb, int (*error_routine)(union ccb *ccb,
1311                                               u_int32_t cam_flags,
1312                                               u_int32_t sense_flags),
1313          u_int32_t cam_flags, u_int32_t sense_flags)
1314 {
1315         struct cd_softc *softc;
1316         struct cam_periph *periph;
1317         int error;
1318
1319         periph = xpt_path_periph(ccb->ccb_h.path);
1320         softc = (struct cd_softc *)periph->softc;
1321
1322         error = cam_periph_runccb(ccb, error_routine, cam_flags, sense_flags,
1323                                   softc->disk->d_devstat);
1324
1325         if (softc->flags & CD_FLAG_CHANGER)
1326                 cdchangerschedule(softc);
1327
1328         return(error);
1329 }
1330
1331 static union ccb *
1332 cdgetccb(struct cam_periph *periph, u_int32_t priority)
1333 {
1334         struct cd_softc *softc;
1335
1336         softc = (struct cd_softc *)periph->softc;
1337
1338         if (softc->flags & CD_FLAG_CHANGER) {
1339                 /*
1340                  * This should work the first time this device is woken up,
1341                  * but just in case it doesn't, we use a while loop.
1342                  */
1343                 while ((softc->flags & CD_FLAG_ACTIVE) == 0) {
1344                         /*
1345                          * If this changer isn't already queued, queue it up.
1346                          */
1347                         if (softc->pinfo.index == CAM_UNQUEUED_INDEX) {
1348                                 softc->pinfo.priority = CAM_PRIORITY_NORMAL;
1349                                 softc->pinfo.generation =
1350                                         ++softc->changer->devq.generation;
1351                                 camq_insert(&softc->changer->devq,
1352                                             (cam_pinfo *)softc);
1353                         }
1354                         if (((softc->changer->flags & CHANGER_TIMEOUT_SCHED)==0)
1355                          && ((softc->changer->flags & CHANGER_NEED_TIMEOUT)==0)
1356                          && ((softc->changer->flags
1357                               & CHANGER_SHORT_TMOUT_SCHED)==0)) {
1358                                 softc->changer->flags |= CHANGER_MANUAL_CALL;
1359                                 cdrunchangerqueue(softc->changer);
1360                         } else
1361                                 msleep(&softc->changer, periph->sim->mtx,
1362                                     PRIBIO, "cgticb", 0);
1363                 }
1364         }
1365         return(cam_periph_getccb(periph, priority));
1366 }
1367
1368
1369 /*
1370  * Actually translate the requested transfer into one the physical driver
1371  * can understand.  The transfer is described by a buf and will include
1372  * only one physical transfer.
1373  */
1374 static void
1375 cdstrategy(struct bio *bp)
1376 {
1377         struct cam_periph *periph;
1378         struct cd_softc *softc;
1379
1380         periph = (struct cam_periph *)bp->bio_disk->d_drv1;
1381         if (periph == NULL) {
1382                 biofinish(bp, NULL, ENXIO);
1383                 return;
1384         }
1385
1386         cam_periph_lock(periph);
1387         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering cdstrategy\n"));
1388
1389         softc = (struct cd_softc *)periph->softc;
1390
1391         /*
1392          * If the device has been made invalid, error out
1393          */
1394         if ((softc->flags & CD_FLAG_INVALID)) {
1395                 cam_periph_unlock(periph);
1396                 biofinish(bp, NULL, ENXIO);
1397                 return;
1398         }
1399
1400         /*
1401          * If we don't have valid media, look for it before trying to
1402          * schedule the I/O.
1403          */
1404         if ((softc->flags & CD_FLAG_VALID_MEDIA) == 0) {
1405                 int error;
1406
1407                 error = cdcheckmedia(periph);
1408                 if (error != 0) {
1409                         cam_periph_unlock(periph);
1410                         biofinish(bp, NULL, error);
1411                         return;
1412                 }
1413         }
1414
1415         /*
1416          * Place it in the queue of disk activities for this disk
1417          */
1418         bioq_disksort(&softc->bio_queue, bp);
1419
1420         /*
1421          * Schedule ourselves for performing the work.  We do things
1422          * differently for changers.
1423          */
1424         if ((softc->flags & CD_FLAG_CHANGER) == 0)
1425                 xpt_schedule(periph, CAM_PRIORITY_NORMAL);
1426         else
1427                 cdschedule(periph, CAM_PRIORITY_NORMAL);
1428
1429         cam_periph_unlock(periph);
1430         return;
1431 }
1432
1433 static void
1434 cdstart(struct cam_periph *periph, union ccb *start_ccb)
1435 {
1436         struct cd_softc *softc;
1437         struct bio *bp;
1438         struct ccb_scsiio *csio;
1439         struct scsi_read_capacity_data *rcap;
1440
1441         softc = (struct cd_softc *)periph->softc;
1442
1443         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering cdstart\n"));
1444
1445         switch (softc->state) {
1446         case CD_STATE_NORMAL:
1447         {
1448                 bp = bioq_first(&softc->bio_queue);
1449                 if (periph->immediate_priority <= periph->pinfo.priority) {
1450                         start_ccb->ccb_h.ccb_state = CD_CCB_WAITING;
1451
1452                         SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
1453                                           periph_links.sle);
1454                         periph->immediate_priority = CAM_PRIORITY_NONE;
1455                         wakeup(&periph->ccb_list);
1456                 } else if (bp == NULL) {
1457                         xpt_release_ccb(start_ccb);
1458                 } else {
1459                         bioq_remove(&softc->bio_queue, bp);
1460
1461                         scsi_read_write(&start_ccb->csio,
1462                                         /*retries*/ cd_retry_count,
1463                                         /* cbfcnp */ cddone,
1464                                         MSG_SIMPLE_Q_TAG,
1465                                         /* read */bp->bio_cmd == BIO_READ,
1466                                         /* byte2 */ 0,
1467                                         /* minimum_cmd_size */ 10,
1468                                         /* lba */ bp->bio_offset /
1469                                           softc->params.blksize,
1470                                         bp->bio_bcount / softc->params.blksize,
1471                                         /* data_ptr */ bp->bio_data,
1472                                         /* dxfer_len */ bp->bio_bcount,
1473                                         /* sense_len */ SSD_FULL_SIZE,
1474                                         /* timeout */ 30000);
1475                         start_ccb->ccb_h.ccb_state = CD_CCB_BUFFER_IO;
1476
1477
1478                         LIST_INSERT_HEAD(&softc->pending_ccbs,
1479                                          &start_ccb->ccb_h, periph_links.le);
1480                         softc->outstanding_cmds++;
1481
1482                         /* We expect a unit attention from this device */
1483                         if ((softc->flags & CD_FLAG_RETRY_UA) != 0) {
1484                                 start_ccb->ccb_h.ccb_state |= CD_CCB_RETRY_UA;
1485                                 softc->flags &= ~CD_FLAG_RETRY_UA;
1486                         }
1487
1488                         start_ccb->ccb_h.ccb_bp = bp;
1489                         bp = bioq_first(&softc->bio_queue);
1490
1491                         xpt_action(start_ccb);
1492                 }
1493                 if (bp != NULL) {
1494                         /* Have more work to do, so ensure we stay scheduled */
1495                         xpt_schedule(periph, CAM_PRIORITY_NORMAL);
1496                 }
1497                 break;
1498         }
1499         case CD_STATE_PROBE:
1500         {
1501
1502                 rcap = (struct scsi_read_capacity_data *)malloc(sizeof(*rcap),
1503                     M_SCSICD, M_NOWAIT | M_ZERO);
1504                 if (rcap == NULL) {
1505                         xpt_print(periph->path,
1506                             "cdstart: Couldn't malloc read_capacity data\n");
1507                         /* cd_free_periph??? */
1508                         break;
1509                 }
1510                 csio = &start_ccb->csio;
1511                 scsi_read_capacity(csio,
1512                                    /*retries*/ cd_retry_count,
1513                                    cddone,
1514                                    MSG_SIMPLE_Q_TAG,
1515                                    rcap,
1516                                    SSD_FULL_SIZE,
1517                                    /*timeout*/20000);
1518                 start_ccb->ccb_h.ccb_bp = NULL;
1519                 start_ccb->ccb_h.ccb_state = CD_CCB_PROBE;
1520                 xpt_action(start_ccb);
1521                 break;
1522         }
1523         }
1524 }
1525
1526 static void
1527 cddone(struct cam_periph *periph, union ccb *done_ccb)
1528 {
1529         struct cd_softc *softc;
1530         struct ccb_scsiio *csio;
1531
1532         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering cddone\n"));
1533
1534         softc = (struct cd_softc *)periph->softc;
1535         csio = &done_ccb->csio;
1536
1537         switch (csio->ccb_h.ccb_state & CD_CCB_TYPE_MASK) {
1538         case CD_CCB_BUFFER_IO:
1539         {
1540                 struct bio      *bp;
1541                 int             error;
1542
1543                 bp = (struct bio *)done_ccb->ccb_h.ccb_bp;
1544                 error = 0;
1545
1546                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
1547                         int sf;
1548
1549                         if ((done_ccb->ccb_h.ccb_state & CD_CCB_RETRY_UA) != 0)
1550                                 sf = SF_RETRY_UA;
1551                         else
1552                                 sf = 0;
1553
1554                         error = cderror(done_ccb, CAM_RETRY_SELTO, sf);
1555                         if (error == ERESTART) {
1556                                 /*
1557                                  * A retry was scheuled, so
1558                                  * just return.
1559                                  */
1560                                 return;
1561                         }
1562                 }
1563
1564                 if (error != 0) {
1565                         xpt_print(periph->path,
1566                             "cddone: got error %#x back\n", error);
1567                         bioq_flush(&softc->bio_queue, NULL, EIO);
1568                         bp->bio_resid = bp->bio_bcount;
1569                         bp->bio_error = error;
1570                         bp->bio_flags |= BIO_ERROR;
1571                         if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
1572                                 cam_release_devq(done_ccb->ccb_h.path,
1573                                          /*relsim_flags*/0,
1574                                          /*reduction*/0,
1575                                          /*timeout*/0,
1576                                          /*getcount_only*/0);
1577
1578                 } else {
1579                         bp->bio_resid = csio->resid;
1580                         bp->bio_error = 0;
1581                         if (bp->bio_resid != 0) {
1582                                 /*
1583                                  * Short transfer ???
1584                                  * XXX: not sure this is correct for partial
1585                                  * transfers at EOM
1586                                  */
1587                                 bp->bio_flags |= BIO_ERROR;
1588                         }
1589                 }
1590
1591                 LIST_REMOVE(&done_ccb->ccb_h, periph_links.le);
1592                 softc->outstanding_cmds--;
1593
1594                 if (softc->flags & CD_FLAG_CHANGER)
1595                         cdchangerschedule(softc);
1596
1597                 biofinish(bp, NULL, 0);
1598                 break;
1599         }
1600         case CD_CCB_PROBE:
1601         {
1602                 struct     scsi_read_capacity_data *rdcap;
1603                 char       announce_buf[120]; /*
1604                                                * Currently (9/30/97) the
1605                                                * longest possible announce
1606                                                * buffer is 108 bytes, for the
1607                                                * first error case below.
1608                                                * That is 39 bytes for the
1609                                                * basic string, 16 bytes for the
1610                                                * biggest sense key (hardware
1611                                                * error), 52 bytes for the
1612                                                * text of the largest sense
1613                                                * qualifier valid for a CDROM,
1614                                                * (0x72, 0x03 or 0x04,
1615                                                * 0x03), and one byte for the
1616                                                * null terminating character.
1617                                                * To allow for longer strings,
1618                                                * the announce buffer is 120
1619                                                * bytes.
1620                                                */
1621                 struct     cd_params *cdp;
1622
1623                 cdp = &softc->params;
1624
1625                 rdcap = (struct scsi_read_capacity_data *)csio->data_ptr;
1626
1627                 cdp->disksize = scsi_4btoul (rdcap->addr) + 1;
1628                 cdp->blksize = scsi_4btoul (rdcap->length);
1629
1630                 if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) {
1631
1632                         snprintf(announce_buf, sizeof(announce_buf),
1633                                 "cd present [%lu x %lu byte records]",
1634                                 cdp->disksize, (u_long)cdp->blksize);
1635
1636                 } else {
1637                         int     error;
1638                         /*
1639                          * Retry any UNIT ATTENTION type errors.  They
1640                          * are expected at boot.
1641                          */
1642                         error = cderror(done_ccb, CAM_RETRY_SELTO,
1643                                         SF_RETRY_UA | SF_NO_PRINT);
1644                         if (error == ERESTART) {
1645                                 /*
1646                                  * A retry was scheuled, so
1647                                  * just return.
1648                                  */
1649                                 return;
1650                         } else if (error != 0) {
1651
1652                                 struct scsi_sense_data *sense;
1653                                 int asc, ascq;
1654                                 int sense_key, error_code;
1655                                 int have_sense;
1656                                 cam_status status;
1657                                 struct ccb_getdev cgd;
1658
1659                                 /* Don't wedge this device's queue */
1660                                 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
1661                                         cam_release_devq(done_ccb->ccb_h.path,
1662                                                  /*relsim_flags*/0,
1663                                                  /*reduction*/0,
1664                                                  /*timeout*/0,
1665                                                  /*getcount_only*/0);
1666
1667                                 status = done_ccb->ccb_h.status;
1668
1669                                 xpt_setup_ccb(&cgd.ccb_h,
1670                                               done_ccb->ccb_h.path,
1671                                               CAM_PRIORITY_NORMAL);
1672                                 cgd.ccb_h.func_code = XPT_GDEV_TYPE;
1673                                 xpt_action((union ccb *)&cgd);
1674
1675                                 if (((csio->ccb_h.flags & CAM_SENSE_PHYS) != 0)
1676                                  || ((csio->ccb_h.flags & CAM_SENSE_PTR) != 0)
1677                                  || ((status & CAM_AUTOSNS_VALID) == 0))
1678                                         have_sense = FALSE;
1679                                 else
1680                                         have_sense = TRUE;
1681
1682                                 if (have_sense) {
1683                                         sense = &csio->sense_data;
1684                                         scsi_extract_sense(sense, &error_code,
1685                                                            &sense_key,
1686                                                            &asc, &ascq);
1687                                 }
1688                                 /*
1689                                  * Attach to anything that claims to be a
1690                                  * CDROM or WORM device, as long as it
1691                                  * doesn't return a "Logical unit not
1692                                  * supported" (0x25) error.
1693                                  */
1694                                 if ((have_sense) && (asc != 0x25)
1695                                  && (error_code == SSD_CURRENT_ERROR)) {
1696                                         const char *sense_key_desc;
1697                                         const char *asc_desc;
1698
1699                                         scsi_sense_desc(sense_key, asc, ascq,
1700                                                         &cgd.inq_data,
1701                                                         &sense_key_desc,
1702                                                         &asc_desc);
1703                                         snprintf(announce_buf,
1704                                             sizeof(announce_buf),
1705                                                 "Attempt to query device "
1706                                                 "size failed: %s, %s",
1707                                                 sense_key_desc,
1708                                                 asc_desc);
1709                                 } else if ((have_sense == 0)
1710                                       && ((status & CAM_STATUS_MASK) ==
1711                                            CAM_SCSI_STATUS_ERROR)
1712                                       && (csio->scsi_status ==
1713                                           SCSI_STATUS_BUSY)) {
1714                                         snprintf(announce_buf,
1715                                             sizeof(announce_buf),
1716                                             "Attempt to query device "
1717                                             "size failed: SCSI Status: %s",
1718                                             scsi_status_string(csio));
1719                                 } else if (SID_TYPE(&cgd.inq_data) == T_CDROM) {
1720                                         /*
1721                                          * We only print out an error for
1722                                          * CDROM type devices.  For WORM
1723                                          * devices, we don't print out an
1724                                          * error since a few WORM devices
1725                                          * don't support CDROM commands.
1726                                          * If we have sense information, go
1727                                          * ahead and print it out.
1728                                          * Otherwise, just say that we
1729                                          * couldn't attach.
1730                                          */
1731
1732                                         /*
1733                                          * Just print out the error, not
1734                                          * the full probe message, when we
1735                                          * don't attach.
1736                                          */
1737                                         if (have_sense)
1738                                                 scsi_sense_print(
1739                                                         &done_ccb->csio);
1740                                         else {
1741                                                 xpt_print(periph->path,
1742                                                     "got CAM status %#x\n",
1743                                                     done_ccb->ccb_h.status);
1744                                         }
1745                                         xpt_print(periph->path, "fatal error, "
1746                                             "failed to attach to device\n");
1747                                         /*
1748                                          * Invalidate this peripheral.
1749                                          */
1750                                         cam_periph_invalidate(periph);
1751
1752                                         announce_buf[0] = '\0';
1753                                 } else {
1754
1755                                         /*
1756                                          * Invalidate this peripheral.
1757                                          */
1758                                         cam_periph_invalidate(periph);
1759                                         announce_buf[0] = '\0';
1760                                 }
1761                         }
1762                 }
1763                 free(rdcap, M_SCSICD);
1764                 if (announce_buf[0] != '\0') {
1765                         xpt_announce_periph(periph, announce_buf);
1766                         if (softc->flags & CD_FLAG_CHANGER)
1767                                 cdchangerschedule(softc);
1768                         /*
1769                          * Create our sysctl variables, now that we know
1770                          * we have successfully attached.
1771                          */
1772                         taskqueue_enqueue(taskqueue_thread,&softc->sysctl_task);
1773                 }
1774                 softc->state = CD_STATE_NORMAL;
1775                 /*
1776                  * Since our peripheral may be invalidated by an error
1777                  * above or an external event, we must release our CCB
1778                  * before releasing the probe lock on the peripheral.
1779                  * The peripheral will only go away once the last lock
1780                  * is removed, and we need it around for the CCB release
1781                  * operation.
1782                  */
1783                 xpt_release_ccb(done_ccb);
1784                 cam_periph_unhold(periph);
1785                 return;
1786         }
1787         case CD_CCB_WAITING:
1788         {
1789                 /* Caller will release the CCB */
1790                 CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
1791                           ("trying to wakeup ccbwait\n"));
1792
1793                 wakeup(&done_ccb->ccb_h.cbfcnp);
1794                 return;
1795         }
1796         default:
1797                 break;
1798         }
1799         xpt_release_ccb(done_ccb);
1800 }
1801
1802 static union cd_pages *
1803 cdgetpage(struct cd_mode_params *mode_params)
1804 {
1805         union cd_pages *page;
1806
1807         if (mode_params->cdb_size == 10)
1808                 page = (union cd_pages *)find_mode_page_10(
1809                         (struct scsi_mode_header_10 *)mode_params->mode_buf);
1810         else
1811                 page = (union cd_pages *)find_mode_page_6(
1812                         (struct scsi_mode_header_6 *)mode_params->mode_buf);
1813
1814         return (page);
1815 }
1816
1817 static int
1818 cdgetpagesize(int page_num)
1819 {
1820         int i;
1821
1822         for (i = 0; i < (sizeof(cd_page_size_table)/
1823              sizeof(cd_page_size_table[0])); i++) {
1824                 if (cd_page_size_table[i].page == page_num)
1825                         return (cd_page_size_table[i].page_size);
1826         }
1827
1828         return (-1);
1829 }
1830
1831 static int
1832 cdioctl(struct disk *dp, u_long cmd, void *addr, int flag, struct thread *td)
1833 {
1834
1835         struct  cam_periph *periph;
1836         struct  cd_softc *softc;
1837         int     nocopyout, error = 0;
1838
1839         periph = (struct cam_periph *)dp->d_drv1;
1840         if (periph == NULL)
1841                 return(ENXIO);
1842
1843         cam_periph_lock(periph);
1844         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering cdioctl\n"));
1845
1846         softc = (struct cd_softc *)periph->softc;
1847
1848         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
1849                   ("trying to do ioctl %#lx\n", cmd));
1850
1851         if ((error = cam_periph_hold(periph, PRIBIO | PCATCH)) != 0) {
1852                 cam_periph_unlock(periph);
1853                 cam_periph_release(periph);
1854                 return (error);
1855         }
1856
1857         /*
1858          * If we don't have media loaded, check for it.  If still don't
1859          * have media loaded, we can only do a load or eject.
1860          *
1861          * We only care whether media is loaded if this is a cd-specific ioctl
1862          * (thus the IOCGROUP check below).  Note that this will break if
1863          * anyone adds any ioctls into the switch statement below that don't
1864          * have their ioctl group set to 'c'.
1865          */
1866         if (((softc->flags & CD_FLAG_VALID_MEDIA) == 0)
1867          && ((cmd != CDIOCCLOSE)
1868           && (cmd != CDIOCEJECT))
1869          && (IOCGROUP(cmd) == 'c')) {
1870                 error = cdcheckmedia(periph);
1871                 if (error != 0) {
1872                         cam_periph_unhold(periph);
1873                         cam_periph_unlock(periph);
1874                         return (error);
1875                 }
1876         }
1877         /*
1878          * Drop the lock here so later mallocs can use WAITOK.  The periph
1879          * is essentially locked still with the cam_periph_hold call above.
1880          */
1881         cam_periph_unlock(periph);
1882
1883         nocopyout = 0;
1884         switch (cmd) {
1885
1886         case CDIOCPLAYTRACKS:
1887                 {
1888                         struct ioc_play_track *args
1889                             = (struct ioc_play_track *) addr;
1890                         struct cd_mode_params params;
1891                         union cd_pages *page;
1892
1893                         params.alloc_len = sizeof(union cd_mode_data_6_10);
1894                         params.mode_buf = malloc(params.alloc_len, M_SCSICD,
1895                                                  M_WAITOK | M_ZERO);
1896
1897                         cam_periph_lock(periph);
1898                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
1899                                   ("trying to do CDIOCPLAYTRACKS\n"));
1900
1901                         error = cdgetmode(periph, &params, AUDIO_PAGE);
1902                         if (error) {
1903                                 free(params.mode_buf, M_SCSICD);
1904                                 cam_periph_unlock(periph);
1905                                 break;
1906                         }
1907                         page = cdgetpage(&params);
1908
1909                         page->audio.flags &= ~CD_PA_SOTC;
1910                         page->audio.flags |= CD_PA_IMMED;
1911                         error = cdsetmode(periph, &params);
1912                         free(params.mode_buf, M_SCSICD);
1913                         if (error) {
1914                                 cam_periph_unlock(periph);
1915                                 break;
1916                         }
1917
1918                         /*
1919                          * This was originally implemented with the PLAY
1920                          * AUDIO TRACK INDEX command, but that command was
1921                          * deprecated after SCSI-2.  Most (all?) SCSI CDROM
1922                          * drives support it but ATAPI and ATAPI-derivative
1923                          * drives don't seem to support it.  So we keep a
1924                          * cache of the table of contents and translate
1925                          * track numbers to MSF format.
1926                          */
1927                         if (softc->flags & CD_FLAG_VALID_TOC) {
1928                                 union msf_lba *sentry, *eentry;
1929                                 int st, et;
1930
1931                                 if (args->end_track <
1932                                     softc->toc.header.ending_track + 1)
1933                                         args->end_track++;
1934                                 if (args->end_track >
1935                                     softc->toc.header.ending_track + 1)
1936                                         args->end_track =
1937                                             softc->toc.header.ending_track + 1;
1938                                 st = args->start_track -
1939                                         softc->toc.header.starting_track;
1940                                 et = args->end_track -
1941                                         softc->toc.header.starting_track;
1942                                 if ((st < 0)
1943                                  || (et < 0)
1944                                  || (st > (softc->toc.header.ending_track -
1945                                      softc->toc.header.starting_track))) {
1946                                         error = EINVAL;
1947                                         break;
1948                                 }
1949                                 sentry = &softc->toc.entries[st].addr;
1950                                 eentry = &softc->toc.entries[et].addr;
1951                                 error = cdplaymsf(periph,
1952                                                   sentry->msf.minute,
1953                                                   sentry->msf.second,
1954                                                   sentry->msf.frame,
1955                                                   eentry->msf.minute,
1956                                                   eentry->msf.second,
1957                                                   eentry->msf.frame);
1958                         } else {
1959                                 /*
1960                                  * If we don't have a valid TOC, try the
1961                                  * play track index command.  It is part of
1962                                  * the SCSI-2 spec, but was removed in the
1963                                  * MMC specs.  ATAPI and ATAPI-derived
1964                                  * drives don't support it.
1965                                  */
1966                                 if (softc->quirks & CD_Q_BCD_TRACKS) {
1967                                         args->start_track =
1968                                                 bin2bcd(args->start_track);
1969                                         args->end_track =
1970                                                 bin2bcd(args->end_track);
1971                                 }
1972                                 error = cdplaytracks(periph,
1973                                                      args->start_track,
1974                                                      args->start_index,
1975                                                      args->end_track,
1976                                                      args->end_index);
1977                         }
1978                         cam_periph_unlock(periph);
1979                 }
1980                 break;
1981         case CDIOCPLAYMSF:
1982                 {
1983                         struct ioc_play_msf *args
1984                                 = (struct ioc_play_msf *) addr;
1985                         struct cd_mode_params params;
1986                         union cd_pages *page;
1987
1988                         params.alloc_len = sizeof(union cd_mode_data_6_10);
1989                         params.mode_buf = malloc(params.alloc_len, M_SCSICD,
1990                                                  M_WAITOK | M_ZERO);
1991
1992                         cam_periph_lock(periph);
1993                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
1994                                   ("trying to do CDIOCPLAYMSF\n"));
1995
1996                         error = cdgetmode(periph, &params, AUDIO_PAGE);
1997                         if (error) {
1998                                 free(params.mode_buf, M_SCSICD);
1999                                 cam_periph_unlock(periph);
2000                                 break;
2001                         }
2002                         page = cdgetpage(&params);
2003
2004                         page->audio.flags &= ~CD_PA_SOTC;
2005                         page->audio.flags |= CD_PA_IMMED;
2006                         error = cdsetmode(periph, &params);
2007                         free(params.mode_buf, M_SCSICD);
2008                         if (error) {
2009                                 cam_periph_unlock(periph);
2010                                 break;
2011                         }
2012                         error = cdplaymsf(periph,
2013                                           args->start_m,
2014                                           args->start_s,
2015                                           args->start_f,
2016                                           args->end_m,
2017                                           args->end_s,
2018                                           args->end_f);
2019                         cam_periph_unlock(periph);
2020                 }
2021                 break;
2022         case CDIOCPLAYBLOCKS:
2023                 {
2024                         struct ioc_play_blocks *args
2025                                 = (struct ioc_play_blocks *) addr;
2026                         struct cd_mode_params params;
2027                         union cd_pages *page;
2028
2029                         params.alloc_len = sizeof(union cd_mode_data_6_10);
2030                         params.mode_buf = malloc(params.alloc_len, M_SCSICD,
2031                                                  M_WAITOK | M_ZERO);
2032
2033                         cam_periph_lock(periph);
2034                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
2035                                   ("trying to do CDIOCPLAYBLOCKS\n"));
2036
2037
2038                         error = cdgetmode(periph, &params, AUDIO_PAGE);
2039                         if (error) {
2040                                 free(params.mode_buf, M_SCSICD);
2041                                 cam_periph_unlock(periph);
2042                                 break;
2043                         }
2044                         page = cdgetpage(&params);
2045
2046                         page->audio.flags &= ~CD_PA_SOTC;
2047                         page->audio.flags |= CD_PA_IMMED;
2048                         error = cdsetmode(periph, &params);
2049                         free(params.mode_buf, M_SCSICD);
2050                         if (error) {
2051                                 cam_periph_unlock(periph);
2052                                 break;
2053                         }
2054                         error = cdplay(periph, args->blk, args->len);
2055                         cam_periph_unlock(periph);
2056                 }
2057                 break;
2058         case CDIOCREADSUBCHANNEL_SYSSPACE:
2059                 nocopyout = 1;
2060                 /* Fallthrough */
2061         case CDIOCREADSUBCHANNEL:
2062                 {
2063                         struct ioc_read_subchannel *args
2064                                 = (struct ioc_read_subchannel *) addr;
2065                         struct cd_sub_channel_info *data;
2066                         u_int32_t len = args->data_len;
2067
2068                         data = malloc(sizeof(struct cd_sub_channel_info),
2069                                       M_SCSICD, M_WAITOK | M_ZERO);
2070
2071                         cam_periph_lock(periph);
2072                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
2073                                   ("trying to do CDIOCREADSUBCHANNEL\n"));
2074
2075                         if ((len > sizeof(struct cd_sub_channel_info)) ||
2076                             (len < sizeof(struct cd_sub_channel_header))) {
2077                                 printf(
2078                                         "scsi_cd: cdioctl: "
2079                                         "cdioreadsubchannel: error, len=%d\n",
2080                                         len);
2081                                 error = EINVAL;
2082                                 free(data, M_SCSICD);
2083                                 cam_periph_unlock(periph);
2084                                 break;
2085                         }
2086
2087                         if (softc->quirks & CD_Q_BCD_TRACKS)
2088                                 args->track = bin2bcd(args->track);
2089
2090                         error = cdreadsubchannel(periph, args->address_format,
2091                                 args->data_format, args->track, data, len);
2092
2093                         if (error) {
2094                                 free(data, M_SCSICD);
2095                                 cam_periph_unlock(periph);
2096                                 break;
2097                         }
2098                         if (softc->quirks & CD_Q_BCD_TRACKS)
2099                                 data->what.track_info.track_number =
2100                                     bcd2bin(data->what.track_info.track_number);
2101                         len = min(len, ((data->header.data_len[0] << 8) +
2102                                 data->header.data_len[1] +
2103                                 sizeof(struct cd_sub_channel_header)));
2104                         cam_periph_unlock(periph);
2105                         if (nocopyout == 0) {
2106                                 if (copyout(data, args->data, len) != 0) {
2107                                         error = EFAULT;
2108                                 }
2109                         } else {
2110                                 bcopy(data, args->data, len);
2111                         }
2112                         free(data, M_SCSICD);
2113                 }
2114                 break;
2115
2116         case CDIOREADTOCHEADER:
2117                 {
2118                         struct ioc_toc_header *th;
2119
2120                         th = malloc(sizeof(struct ioc_toc_header), M_SCSICD,
2121                                     M_WAITOK | M_ZERO);
2122
2123                         cam_periph_lock(periph);
2124                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
2125                                   ("trying to do CDIOREADTOCHEADER\n"));
2126
2127                         error = cdreadtoc(periph, 0, 0, (u_int8_t *)th,
2128                                           sizeof (*th), /*sense_flags*/0);
2129                         if (error) {
2130                                 free(th, M_SCSICD);
2131                                 cam_periph_unlock(periph);
2132                                 break;
2133                         }
2134                         if (softc->quirks & CD_Q_BCD_TRACKS) {
2135                                 /* we are going to have to convert the BCD
2136                                  * encoding on the cd to what is expected
2137                                  */
2138                                 th->starting_track =
2139                                         bcd2bin(th->starting_track);
2140                                 th->ending_track = bcd2bin(th->ending_track);
2141                         }
2142                         th->len = ntohs(th->len);
2143                         bcopy(th, addr, sizeof(*th));
2144                         free(th, M_SCSICD);
2145                         cam_periph_unlock(periph);
2146                 }
2147                 break;
2148         case CDIOREADTOCENTRYS:
2149                 {
2150                         struct cd_tocdata *data;
2151                         struct cd_toc_single *lead;
2152                         struct ioc_read_toc_entry *te =
2153                                 (struct ioc_read_toc_entry *) addr;
2154                         struct ioc_toc_header *th;
2155                         u_int32_t len, readlen, idx, num;
2156                         u_int32_t starting_track = te->starting_track;
2157
2158                         data = malloc(sizeof(*data), M_SCSICD, M_WAITOK | M_ZERO);
2159                         lead = malloc(sizeof(*lead), M_SCSICD, M_WAITOK | M_ZERO);
2160
2161                         cam_periph_lock(periph);
2162                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
2163                                   ("trying to do CDIOREADTOCENTRYS\n"));
2164
2165                         if (te->data_len < sizeof(struct cd_toc_entry)
2166                          || (te->data_len % sizeof(struct cd_toc_entry)) != 0
2167                          || (te->address_format != CD_MSF_FORMAT
2168                           && te->address_format != CD_LBA_FORMAT)) {
2169                                 error = EINVAL;
2170                                 printf("scsi_cd: error in readtocentries, "
2171                                        "returning EINVAL\n");
2172                                 free(data, M_SCSICD);
2173                                 free(lead, M_SCSICD);
2174                                 cam_periph_unlock(periph);
2175                                 break;
2176                         }
2177
2178                         th = &data->header;
2179                         error = cdreadtoc(periph, 0, 0, (u_int8_t *)th,
2180                                           sizeof (*th), /*sense_flags*/0);
2181                         if (error) {
2182                                 free(data, M_SCSICD);
2183                                 free(lead, M_SCSICD);
2184                                 cam_periph_unlock(periph);
2185                                 break;
2186                         }
2187
2188                         if (softc->quirks & CD_Q_BCD_TRACKS) {
2189                                 /* we are going to have to convert the BCD
2190                                  * encoding on the cd to what is expected
2191                                  */
2192                                 th->starting_track =
2193                                     bcd2bin(th->starting_track);
2194                                 th->ending_track = bcd2bin(th->ending_track);
2195                         }
2196
2197                         if (starting_track == 0)
2198                                 starting_track = th->starting_track;
2199                         else if (starting_track == LEADOUT)
2200                                 starting_track = th->ending_track + 1;
2201                         else if (starting_track < th->starting_track ||
2202                                  starting_track > th->ending_track + 1) {
2203                                 printf("scsi_cd: error in readtocentries, "
2204                                        "returning EINVAL\n");
2205                                 free(data, M_SCSICD);
2206                                 free(lead, M_SCSICD);
2207                                 cam_periph_unlock(periph);
2208                                 error = EINVAL;
2209                                 break;
2210                         }
2211
2212                         /* calculate reading length without leadout entry */
2213                         readlen = (th->ending_track - starting_track + 1) *
2214                                   sizeof(struct cd_toc_entry);
2215
2216                         /* and with leadout entry */
2217                         len = readlen + sizeof(struct cd_toc_entry);
2218                         if (te->data_len < len) {
2219                                 len = te->data_len;
2220                                 if (readlen > len)
2221                                         readlen = len;
2222                         }
2223                         if (len > sizeof(data->entries)) {
2224                                 printf("scsi_cd: error in readtocentries, "
2225                                        "returning EINVAL\n");
2226                                 error = EINVAL;
2227                                 free(data, M_SCSICD);
2228                                 free(lead, M_SCSICD);
2229                                 cam_periph_unlock(periph);
2230                                 break;
2231                         }
2232                         num = len / sizeof(struct cd_toc_entry);
2233
2234                         if (readlen > 0) {
2235                                 error = cdreadtoc(periph, te->address_format,
2236                                                   starting_track,
2237                                                   (u_int8_t *)data,
2238                                                   readlen + sizeof (*th),
2239                                                   /*sense_flags*/0);
2240                                 if (error) {
2241                                         free(data, M_SCSICD);
2242                                         free(lead, M_SCSICD);
2243                                         cam_periph_unlock(periph);
2244                                         break;
2245                                 }
2246                         }
2247
2248                         /* make leadout entry if needed */
2249                         idx = starting_track + num - 1;
2250                         if (softc->quirks & CD_Q_BCD_TRACKS)
2251                                 th->ending_track = bcd2bin(th->ending_track);
2252                         if (idx == th->ending_track + 1) {
2253                                 error = cdreadtoc(periph, te->address_format,
2254                                                   LEADOUT, (u_int8_t *)lead,
2255                                                   sizeof(*lead),
2256                                                   /*sense_flags*/0);
2257                                 if (error) {
2258                                         free(data, M_SCSICD);
2259                                         free(lead, M_SCSICD);
2260                                         cam_periph_unlock(periph);
2261                                         break;
2262                                 }
2263                                 data->entries[idx - starting_track] =
2264                                         lead->entry;
2265                         }
2266                         if (softc->quirks & CD_Q_BCD_TRACKS) {
2267                                 for (idx = 0; idx < num - 1; idx++) {
2268                                         data->entries[idx].track =
2269                                             bcd2bin(data->entries[idx].track);
2270                                 }
2271                         }
2272
2273                         cam_periph_unlock(periph);
2274                         error = copyout(data->entries, te->data, len);
2275                         free(data, M_SCSICD);
2276                         free(lead, M_SCSICD);
2277                 }
2278                 break;
2279         case CDIOREADTOCENTRY:
2280                 {
2281                         struct cd_toc_single *data;
2282                         struct ioc_read_toc_single_entry *te =
2283                                 (struct ioc_read_toc_single_entry *) addr;
2284                         struct ioc_toc_header *th;
2285                         u_int32_t track;
2286
2287                         data = malloc(sizeof(*data), M_SCSICD, M_WAITOK | M_ZERO);
2288
2289                         cam_periph_lock(periph);
2290                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
2291                                   ("trying to do CDIOREADTOCENTRY\n"));
2292
2293                         if (te->address_format != CD_MSF_FORMAT
2294                             && te->address_format != CD_LBA_FORMAT) {
2295                                 printf("error in readtocentry, "
2296                                        " returning EINVAL\n");
2297                                 free(data, M_SCSICD);
2298                                 error = EINVAL;
2299                                 cam_periph_unlock(periph);
2300                                 break;
2301                         }
2302
2303                         th = &data->header;
2304                         error = cdreadtoc(periph, 0, 0, (u_int8_t *)th,
2305                                           sizeof (*th), /*sense_flags*/0);
2306                         if (error) {
2307                                 free(data, M_SCSICD);
2308                                 cam_periph_unlock(periph);
2309                                 break;
2310                         }
2311
2312                         if (softc->quirks & CD_Q_BCD_TRACKS) {
2313                                 /* we are going to have to convert the BCD
2314                                  * encoding on the cd to what is expected
2315                                  */
2316                                 th->starting_track =
2317                                     bcd2bin(th->starting_track);
2318                                 th->ending_track = bcd2bin(th->ending_track);
2319                         }
2320                         track = te->track;
2321                         if (track == 0)
2322                                 track = th->starting_track;
2323                         else if (track == LEADOUT)
2324                                 /* OK */;
2325                         else if (track < th->starting_track ||
2326                                  track > th->ending_track + 1) {
2327                                 printf("error in readtocentry, "
2328                                        " returning EINVAL\n");
2329                                 free(data, M_SCSICD);
2330                                 error = EINVAL;
2331                                 cam_periph_unlock(periph);
2332                                 break;
2333                         }
2334
2335                         error = cdreadtoc(periph, te->address_format, track,
2336                                           (u_int8_t *)data, sizeof(*data),
2337                                           /*sense_flags*/0);
2338                         if (error) {
2339                                 free(data, M_SCSICD);
2340                                 cam_periph_unlock(periph);
2341                                 break;
2342                         }
2343
2344                         if (softc->quirks & CD_Q_BCD_TRACKS)
2345                                 data->entry.track = bcd2bin(data->entry.track);
2346                         bcopy(&data->entry, &te->entry,
2347                               sizeof(struct cd_toc_entry));
2348                         free(data, M_SCSICD);
2349                         cam_periph_unlock(periph);
2350                 }
2351                 break;
2352         case CDIOCSETPATCH:
2353                 {
2354                         struct ioc_patch *arg = (struct ioc_patch *)addr;
2355                         struct cd_mode_params params;
2356                         union cd_pages *page;
2357
2358                         params.alloc_len = sizeof(union cd_mode_data_6_10);
2359                         params.mode_buf = malloc(params.alloc_len, M_SCSICD,
2360                                                  M_WAITOK | M_ZERO);
2361
2362                         cam_periph_lock(periph);
2363                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
2364                                   ("trying to do CDIOCSETPATCH\n"));
2365
2366                         error = cdgetmode(periph, &params, AUDIO_PAGE);
2367                         if (error) {
2368                                 free(params.mode_buf, M_SCSICD);
2369                                 cam_periph_unlock(periph);
2370                                 break;
2371                         }
2372                         page = cdgetpage(&params);
2373
2374                         page->audio.port[LEFT_PORT].channels =
2375                                 arg->patch[0];
2376                         page->audio.port[RIGHT_PORT].channels =
2377                                 arg->patch[1];
2378                         page->audio.port[2].channels = arg->patch[2];
2379                         page->audio.port[3].channels = arg->patch[3];
2380                         error = cdsetmode(periph, &params);
2381                         free(params.mode_buf, M_SCSICD);
2382                         cam_periph_unlock(periph);
2383                 }
2384                 break;
2385         case CDIOCGETVOL:
2386                 {
2387                         struct ioc_vol *arg = (struct ioc_vol *) addr;
2388                         struct cd_mode_params params;
2389                         union cd_pages *page;
2390
2391                         params.alloc_len = sizeof(union cd_mode_data_6_10);
2392                         params.mode_buf = malloc(params.alloc_len, M_SCSICD,
2393                                                  M_WAITOK | M_ZERO);
2394
2395                         cam_periph_lock(periph);
2396                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
2397                                   ("trying to do CDIOCGETVOL\n"));
2398
2399                         error = cdgetmode(periph, &params, AUDIO_PAGE);
2400                         if (error) {
2401                                 free(params.mode_buf, M_SCSICD);
2402                                 cam_periph_unlock(periph);
2403                                 break;
2404                         }
2405                         page = cdgetpage(&params);
2406
2407                         arg->vol[LEFT_PORT] =
2408                                 page->audio.port[LEFT_PORT].volume;
2409                         arg->vol[RIGHT_PORT] =
2410                                 page->audio.port[RIGHT_PORT].volume;
2411                         arg->vol[2] = page->audio.port[2].volume;
2412                         arg->vol[3] = page->audio.port[3].volume;
2413                         free(params.mode_buf, M_SCSICD);
2414                         cam_periph_unlock(periph);
2415                 }
2416                 break;
2417         case CDIOCSETVOL:
2418                 {
2419                         struct ioc_vol *arg = (struct ioc_vol *) addr;
2420                         struct cd_mode_params params;
2421                         union cd_pages *page;
2422
2423                         params.alloc_len = sizeof(union cd_mode_data_6_10);
2424                         params.mode_buf = malloc(params.alloc_len, M_SCSICD,
2425                                                  M_WAITOK | M_ZERO);
2426
2427                         cam_periph_lock(periph);
2428                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
2429                                   ("trying to do CDIOCSETVOL\n"));
2430
2431                         error = cdgetmode(periph, &params, AUDIO_PAGE);
2432                         if (error) {
2433                                 free(params.mode_buf, M_SCSICD);
2434                                 cam_periph_unlock(periph);
2435                                 break;
2436                         }
2437                         page = cdgetpage(&params);
2438
2439                         page->audio.port[LEFT_PORT].channels = CHANNEL_0;
2440                         page->audio.port[LEFT_PORT].volume =
2441                                 arg->vol[LEFT_PORT];
2442                         page->audio.port[RIGHT_PORT].channels = CHANNEL_1;
2443                         page->audio.port[RIGHT_PORT].volume =
2444                                 arg->vol[RIGHT_PORT];
2445                         page->audio.port[2].volume = arg->vol[2];
2446                         page->audio.port[3].volume = arg->vol[3];
2447                         error = cdsetmode(periph, &params);
2448                         cam_periph_unlock(periph);
2449                         free(params.mode_buf, M_SCSICD);
2450                 }
2451                 break;
2452         case CDIOCSETMONO:
2453                 {
2454                         struct cd_mode_params params;
2455                         union cd_pages *page;
2456
2457                         params.alloc_len = sizeof(union cd_mode_data_6_10);
2458                         params.mode_buf = malloc(params.alloc_len, M_SCSICD,
2459                                                  M_WAITOK | M_ZERO);
2460
2461                         cam_periph_lock(periph);
2462                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
2463                                   ("trying to do CDIOCSETMONO\n"));
2464
2465                         error = cdgetmode(periph, &params, AUDIO_PAGE);
2466                         if (error) {
2467                                 free(params.mode_buf, M_SCSICD);
2468                                 cam_periph_unlock(periph);
2469                                 break;
2470                         }
2471                         page = cdgetpage(&params);
2472
2473                         page->audio.port[LEFT_PORT].channels =
2474                                 LEFT_CHANNEL | RIGHT_CHANNEL;
2475                         page->audio.port[RIGHT_PORT].channels =
2476                                 LEFT_CHANNEL | RIGHT_CHANNEL;
2477                         page->audio.port[2].channels = 0;
2478                         page->audio.port[3].channels = 0;
2479                         error = cdsetmode(periph, &params);
2480                         cam_periph_unlock(periph);
2481                         free(params.mode_buf, M_SCSICD);
2482                 }
2483                 break;
2484         case CDIOCSETSTEREO:
2485                 {
2486                         struct cd_mode_params params;
2487                         union cd_pages *page;
2488
2489                         params.alloc_len = sizeof(union cd_mode_data_6_10);
2490                         params.mode_buf = malloc(params.alloc_len, M_SCSICD,
2491                                                  M_WAITOK | M_ZERO);
2492
2493                         cam_periph_lock(periph);
2494                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
2495                                   ("trying to do CDIOCSETSTEREO\n"));
2496
2497                         error = cdgetmode(periph, &params, AUDIO_PAGE);
2498                         if (error) {
2499                                 free(params.mode_buf, M_SCSICD);
2500                                 cam_periph_unlock(periph);
2501                                 break;
2502                         }
2503                         page = cdgetpage(&params);
2504
2505                         page->audio.port[LEFT_PORT].channels =
2506                                 LEFT_CHANNEL;
2507                         page->audio.port[RIGHT_PORT].channels =
2508                                 RIGHT_CHANNEL;
2509                         page->audio.port[2].channels = 0;
2510                         page->audio.port[3].channels = 0;
2511                         error = cdsetmode(periph, &params);
2512                         free(params.mode_buf, M_SCSICD);
2513                         cam_periph_unlock(periph);
2514                 }
2515                 break;
2516         case CDIOCSETMUTE:
2517                 {
2518                         struct cd_mode_params params;
2519                         union cd_pages *page;
2520
2521                         params.alloc_len = sizeof(union cd_mode_data_6_10);
2522                         params.mode_buf = malloc(params.alloc_len, M_SCSICD,
2523                                                  M_WAITOK | M_ZERO);
2524
2525                         cam_periph_lock(periph);
2526                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
2527                                   ("trying to do CDIOCSETMUTE\n"));
2528
2529                         error = cdgetmode(periph, &params, AUDIO_PAGE);
2530                         if (error) {
2531                                 free(params.mode_buf, M_SCSICD);
2532                                 cam_periph_unlock(periph);
2533                                 break;
2534                         }
2535                         page = cdgetpage(&params);
2536
2537                         page->audio.port[LEFT_PORT].channels = 0;
2538                         page->audio.port[RIGHT_PORT].channels = 0;
2539                         page->audio.port[2].channels = 0;
2540                         page->audio.port[3].channels = 0;
2541                         error = cdsetmode(periph, &params);
2542                         free(params.mode_buf, M_SCSICD);
2543                         cam_periph_unlock(periph);
2544                 }
2545                 break;
2546         case CDIOCSETLEFT:
2547                 {
2548                         struct cd_mode_params params;
2549                         union cd_pages *page;
2550
2551                         params.alloc_len = sizeof(union cd_mode_data_6_10);
2552                         params.mode_buf = malloc(params.alloc_len, M_SCSICD,
2553                                                  M_WAITOK | M_ZERO);
2554
2555                         cam_periph_lock(periph);
2556                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
2557                                   ("trying to do CDIOCSETLEFT\n"));
2558
2559                         error = cdgetmode(periph, &params, AUDIO_PAGE);
2560                         if (error) {
2561                                 free(params.mode_buf, M_SCSICD);
2562                                 cam_periph_unlock(periph);
2563                                 break;
2564                         }
2565                         page = cdgetpage(&params);
2566
2567                         page->audio.port[LEFT_PORT].channels = LEFT_CHANNEL;
2568                         page->audio.port[RIGHT_PORT].channels = LEFT_CHANNEL;
2569                         page->audio.port[2].channels = 0;
2570                         page->audio.port[3].channels = 0;
2571                         error = cdsetmode(periph, &params);
2572                         free(params.mode_buf, M_SCSICD);
2573                         cam_periph_unlock(periph);
2574                 }
2575                 break;
2576         case CDIOCSETRIGHT:
2577                 {
2578                         struct cd_mode_params params;
2579                         union cd_pages *page;
2580
2581                         params.alloc_len = sizeof(union cd_mode_data_6_10);
2582                         params.mode_buf = malloc(params.alloc_len, M_SCSICD,
2583                                                  M_WAITOK | M_ZERO);
2584
2585                         cam_periph_lock(periph);
2586                         CAM_DEBUG(periph->path, CAM_DEBUG_SUBTRACE,
2587                                   ("trying to do CDIOCSETRIGHT\n"));
2588
2589                         error = cdgetmode(periph, &params, AUDIO_PAGE);
2590                         if (error) {
2591                                 free(params.mode_buf, M_SCSICD);
2592                                 cam_periph_unlock(periph);
2593                                 break;
2594                         }
2595                         page = cdgetpage(&params);
2596
2597                         page->audio.port[LEFT_PORT].channels = RIGHT_CHANNEL;
2598                         page->audio.port[RIGHT_PORT].channels = RIGHT_CHANNEL;
2599                         page->audio.port[2].channels = 0;
2600                         page->audio.port[3].channels = 0;
2601                         error = cdsetmode(periph, &params);
2602                         free(params.mode_buf, M_SCSICD);
2603                         cam_periph_unlock(periph);
2604                 }
2605                 break;
2606         case CDIOCRESUME:
2607                 cam_periph_lock(periph);
2608                 error = cdpause(periph, 1);
2609                 cam_periph_unlock(periph);
2610                 break;
2611         case CDIOCPAUSE:
2612                 cam_periph_lock(periph);
2613                 error = cdpause(periph, 0);
2614                 cam_periph_unlock(periph);
2615                 break;
2616         case CDIOCSTART:
2617                 cam_periph_lock(periph);
2618                 error = cdstartunit(periph, 0);
2619                 cam_periph_unlock(periph);
2620                 break;
2621         case CDIOCCLOSE:
2622                 cam_periph_lock(periph);
2623                 error = cdstartunit(periph, 1);
2624                 cam_periph_unlock(periph);
2625                 break;
2626         case CDIOCSTOP:
2627                 cam_periph_lock(periph);
2628                 error = cdstopunit(periph, 0);
2629                 cam_periph_unlock(periph);
2630                 break;
2631         case CDIOCEJECT:
2632                 cam_periph_lock(periph);
2633                 error = cdstopunit(periph, 1);
2634                 cam_periph_unlock(periph);
2635                 break;
2636         case CDIOCALLOW:
2637                 cam_periph_lock(periph);
2638                 cdprevent(periph, PR_ALLOW);
2639                 cam_periph_unlock(periph);
2640                 break;
2641         case CDIOCPREVENT:
2642                 cam_periph_lock(periph);
2643                 cdprevent(periph, PR_PREVENT);
2644                 cam_periph_unlock(periph);
2645                 break;
2646         case CDIOCSETDEBUG:
2647                 /* sc_link->flags |= (SDEV_DB1 | SDEV_DB2); */
2648                 error = ENOTTY;
2649                 break;
2650         case CDIOCCLRDEBUG:
2651                 /* sc_link->flags &= ~(SDEV_DB1 | SDEV_DB2); */
2652                 error = ENOTTY;
2653                 break;
2654         case CDIOCRESET:
2655                 /* return (cd_reset(periph)); */
2656                 error = ENOTTY;
2657                 break;
2658         case CDRIOCREADSPEED:
2659                 cam_periph_lock(periph);
2660                 error = cdsetspeed(periph, *(u_int32_t *)addr, CDR_MAX_SPEED);
2661                 cam_periph_unlock(periph);
2662                 break;
2663         case CDRIOCWRITESPEED:
2664                 cam_periph_lock(periph);
2665                 error = cdsetspeed(periph, CDR_MAX_SPEED, *(u_int32_t *)addr);
2666                 cam_periph_unlock(periph);
2667                 break;
2668         case DVDIOCSENDKEY:
2669         case DVDIOCREPORTKEY: {
2670                 struct dvd_authinfo *authinfo;
2671
2672                 authinfo = (struct dvd_authinfo *)addr;
2673
2674                 cam_periph_lock(periph);
2675                 if (cmd == DVDIOCREPORTKEY)
2676                         error = cdreportkey(periph, authinfo);
2677                 else
2678                         error = cdsendkey(periph, authinfo);
2679                 cam_periph_unlock(periph);
2680                 break;
2681                 }
2682         case DVDIOCREADSTRUCTURE: {
2683                 struct dvd_struct *dvdstruct;
2684
2685                 dvdstruct = (struct dvd_struct *)addr;
2686
2687                 cam_periph_lock(periph);
2688                 error = cdreaddvdstructure(periph, dvdstruct);
2689                 cam_periph_unlock(periph);
2690
2691                 break;
2692         }
2693         default:
2694                 cam_periph_lock(periph);
2695                 error = cam_periph_ioctl(periph, cmd, addr, cderror);
2696                 cam_periph_unlock(periph);
2697                 break;
2698         }
2699
2700         cam_periph_lock(periph);
2701         cam_periph_unhold(periph);
2702
2703         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("leaving cdioctl\n"));
2704         if (error && bootverbose) {
2705                 printf("scsi_cd.c::ioctl cmd=%08lx error=%d\n", cmd, error);
2706         }
2707         cam_periph_unlock(periph);
2708
2709         return (error);
2710 }
2711
2712 static void
2713 cdprevent(struct cam_periph *periph, int action)
2714 {
2715         union   ccb *ccb;
2716         struct  cd_softc *softc;
2717         int     error;
2718
2719         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering cdprevent\n"));
2720
2721         softc = (struct cd_softc *)periph->softc;
2722
2723         if (((action == PR_ALLOW)
2724           && (softc->flags & CD_FLAG_DISC_LOCKED) == 0)
2725          || ((action == PR_PREVENT)
2726           && (softc->flags & CD_FLAG_DISC_LOCKED) != 0)) {
2727                 return;
2728         }
2729
2730         ccb = cdgetccb(periph, CAM_PRIORITY_NORMAL);
2731
2732         scsi_prevent(&ccb->csio,
2733                      /*retries*/ cd_retry_count,
2734                      cddone,
2735                      MSG_SIMPLE_Q_TAG,
2736                      action,
2737                      SSD_FULL_SIZE,
2738                      /* timeout */60000);
2739
2740         error = cdrunccb(ccb, cderror, /*cam_flags*/CAM_RETRY_SELTO,
2741                         /*sense_flags*/SF_RETRY_UA|SF_NO_PRINT);
2742
2743         xpt_release_ccb(ccb);
2744
2745         if (error == 0) {
2746                 if (action == PR_ALLOW)
2747                         softc->flags &= ~CD_FLAG_DISC_LOCKED;
2748                 else
2749                         softc->flags |= CD_FLAG_DISC_LOCKED;
2750         }
2751 }
2752
2753 /*
2754  * XXX: the disk media and sector size is only really able to change
2755  * XXX: while the device is closed.
2756  */
2757 static int
2758 cdcheckmedia(struct cam_periph *periph)
2759 {
2760         struct cd_softc *softc;
2761         struct ioc_toc_header *toch;
2762         struct cd_toc_single leadout;
2763         u_int32_t size, toclen;
2764         int error, num_entries, cdindex;
2765
2766         softc = (struct cd_softc *)periph->softc;
2767
2768         cdprevent(periph, PR_PREVENT);
2769         softc->disk->d_sectorsize = 2048;
2770         softc->disk->d_mediasize = 0;
2771
2772         /*
2773          * Get the disc size and block size.  If we can't get it, we don't
2774          * have media, most likely.
2775          */
2776         if ((error = cdsize(periph, &size)) != 0) {
2777                 softc->flags &= ~(CD_FLAG_VALID_MEDIA|CD_FLAG_VALID_TOC);
2778                 cdprevent(periph, PR_ALLOW);
2779                 return (error);
2780         } else {
2781                 softc->flags |= CD_FLAG_VALID_MEDIA;
2782                 softc->disk->d_sectorsize = softc->params.blksize;
2783                 softc->disk->d_mediasize =
2784                     (off_t)softc->params.blksize * softc->params.disksize;
2785         }
2786
2787         /*
2788          * Now we check the table of contents.  This (currently) is only
2789          * used for the CDIOCPLAYTRACKS ioctl.  It may be used later to do
2790          * things like present a separate entry in /dev for each track,
2791          * like that acd(4) driver does.
2792          */
2793         bzero(&softc->toc, sizeof(softc->toc));
2794         toch = &softc->toc.header;
2795         /*
2796          * We will get errors here for media that doesn't have a table of
2797          * contents.  According to the MMC-3 spec: "When a Read TOC/PMA/ATIP
2798          * command is presented for a DDCD/CD-R/RW media, where the first TOC
2799          * has not been recorded (no complete session) and the Format codes
2800          * 0000b, 0001b, or 0010b are specified, this command shall be rejected
2801          * with an INVALID FIELD IN CDB.  Devices that are not capable of
2802          * reading an incomplete session on DDC/CD-R/RW media shall report
2803          * CANNOT READ MEDIUM - INCOMPATIBLE FORMAT."
2804          *
2805          * So this isn't fatal if we can't read the table of contents, it
2806          * just means that the user won't be able to issue the play tracks
2807          * ioctl, and likely lots of other stuff won't work either.  They
2808          * need to burn the CD before we can do a whole lot with it.  So
2809          * we don't print anything here if we get an error back.
2810          */
2811         error = cdreadtoc(periph, 0, 0, (u_int8_t *)toch, sizeof(*toch),
2812                           SF_NO_PRINT);
2813         /*
2814          * Errors in reading the table of contents aren't fatal, we just
2815          * won't have a valid table of contents cached.
2816          */
2817         if (error != 0) {
2818                 error = 0;
2819                 bzero(&softc->toc, sizeof(softc->toc));
2820                 goto bailout;
2821         }
2822
2823         if (softc->quirks & CD_Q_BCD_TRACKS) {
2824                 toch->starting_track = bcd2bin(toch->starting_track);
2825                 toch->ending_track = bcd2bin(toch->ending_track);
2826         }
2827
2828         /* Number of TOC entries, plus leadout */
2829         num_entries = (toch->ending_track - toch->starting_track) + 2;
2830
2831         if (num_entries <= 0)
2832                 goto bailout;
2833
2834         toclen = num_entries * sizeof(struct cd_toc_entry);
2835
2836         error = cdreadtoc(periph, CD_MSF_FORMAT, toch->starting_track,
2837                           (u_int8_t *)&softc->toc, toclen + sizeof(*toch),
2838                           SF_NO_PRINT);
2839         if (error != 0) {
2840                 error = 0;
2841                 bzero(&softc->toc, sizeof(softc->toc));
2842                 goto bailout;
2843         }
2844
2845         if (softc->quirks & CD_Q_BCD_TRACKS) {
2846                 toch->starting_track = bcd2bin(toch->starting_track);
2847                 toch->ending_track = bcd2bin(toch->ending_track);
2848         }
2849         /*
2850          * XXX KDM is this necessary?  Probably only if the drive doesn't
2851          * return leadout information with the table of contents.
2852          */
2853         cdindex = toch->starting_track + num_entries -1;
2854         if (cdindex == toch->ending_track + 1) {
2855
2856                 error = cdreadtoc(periph, CD_MSF_FORMAT, LEADOUT,
2857                                   (u_int8_t *)&leadout, sizeof(leadout),
2858                                   SF_NO_PRINT);
2859                 if (error != 0) {
2860                         error = 0;
2861                         goto bailout;
2862                 }
2863                 softc->toc.entries[cdindex - toch->starting_track] =
2864                         leadout.entry;
2865         }
2866         if (softc->quirks & CD_Q_BCD_TRACKS) {
2867                 for (cdindex = 0; cdindex < num_entries - 1; cdindex++) {
2868                         softc->toc.entries[cdindex].track =
2869                                 bcd2bin(softc->toc.entries[cdindex].track);
2870                 }
2871         }
2872
2873         softc->flags |= CD_FLAG_VALID_TOC;
2874
2875 bailout:
2876
2877         /*
2878          * We unconditionally (re)set the blocksize each time the
2879          * CD device is opened.  This is because the CD can change,
2880          * and therefore the blocksize might change.
2881          * XXX problems here if some slice or partition is still
2882          * open with the old size?
2883          */
2884         if ((softc->disk->d_devstat->flags & DEVSTAT_BS_UNAVAILABLE) != 0)
2885                 softc->disk->d_devstat->flags &= ~DEVSTAT_BS_UNAVAILABLE;
2886         softc->disk->d_devstat->block_size = softc->params.blksize;
2887
2888         return (error);
2889 }
2890
2891 static int
2892 cdsize(struct cam_periph *periph, u_int32_t *size)
2893 {
2894         struct cd_softc *softc;
2895         union ccb *ccb;
2896         struct scsi_read_capacity_data *rcap_buf;
2897         int error;
2898
2899         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering cdsize\n"));
2900
2901         softc = (struct cd_softc *)periph->softc;
2902
2903         ccb = cdgetccb(periph, CAM_PRIORITY_NORMAL);
2904
2905         /* XXX Should be M_WAITOK */
2906         rcap_buf = malloc(sizeof(struct scsi_read_capacity_data),
2907                           M_SCSICD, M_NOWAIT | M_ZERO);
2908         if (rcap_buf == NULL)
2909                 return (ENOMEM);
2910
2911         scsi_read_capacity(&ccb->csio,
2912                            /*retries*/ cd_retry_count,
2913                            cddone,
2914                            MSG_SIMPLE_Q_TAG,
2915                            rcap_buf,
2916                            SSD_FULL_SIZE,
2917                            /* timeout */20000);
2918
2919         error = cdrunccb(ccb, cderror, /*cam_flags*/CAM_RETRY_SELTO,
2920                          /*sense_flags*/SF_RETRY_UA|SF_NO_PRINT);
2921
2922         xpt_release_ccb(ccb);
2923
2924         softc->params.disksize = scsi_4btoul(rcap_buf->addr) + 1;
2925         softc->params.blksize  = scsi_4btoul(rcap_buf->length);
2926         /* Make sure we got at least some block size. */
2927         if (error == 0 && softc->params.blksize == 0)
2928                 error = EIO;
2929         /*
2930          * SCSI-3 mandates that the reported blocksize shall be 2048.
2931          * Older drives sometimes report funny values, trim it down to
2932          * 2048, or other parts of the kernel will get confused.
2933          *
2934          * XXX we leave drives alone that might report 512 bytes, as
2935          * well as drives reporting more weird sizes like perhaps 4K.
2936          */
2937         if (softc->params.blksize > 2048 && softc->params.blksize <= 2352)
2938                 softc->params.blksize = 2048;
2939
2940         free(rcap_buf, M_SCSICD);
2941         *size = softc->params.disksize;
2942
2943         return (error);
2944
2945 }
2946
2947 static int
2948 cd6byteworkaround(union ccb *ccb)
2949 {
2950         u_int8_t *cdb;
2951         struct cam_periph *periph;
2952         struct cd_softc *softc;
2953         struct cd_mode_params *params;
2954         int frozen, found;
2955
2956         periph = xpt_path_periph(ccb->ccb_h.path);
2957         softc = (struct cd_softc *)periph->softc;
2958
2959         cdb = ccb->csio.cdb_io.cdb_bytes;
2960
2961         if ((ccb->ccb_h.flags & CAM_CDB_POINTER)
2962          || ((cdb[0] != MODE_SENSE_6)
2963           && (cdb[0] != MODE_SELECT_6)))
2964                 return (0);
2965
2966         /*
2967          * Because there is no convenient place to stash the overall
2968          * cd_mode_params structure pointer, we have to grab it like this.
2969          * This means that ALL MODE_SENSE and MODE_SELECT requests in the
2970          * cd(4) driver MUST go through cdgetmode() and cdsetmode()!
2971          *
2972          * XXX It would be nice if, at some point, we could increase the
2973          * number of available peripheral private pointers.  Both pointers
2974          * are currently used in most every peripheral driver.
2975          */
2976         found = 0;
2977
2978         STAILQ_FOREACH(params, &softc->mode_queue, links) {
2979                 if (params->mode_buf == ccb->csio.data_ptr) {
2980                         found = 1;
2981                         break;
2982                 }
2983         }
2984
2985         /*
2986          * This shouldn't happen.  All mode sense and mode select
2987          * operations in the cd(4) driver MUST go through cdgetmode() and
2988          * cdsetmode()!
2989          */
2990         if (found == 0) {
2991                 xpt_print(periph->path,
2992                     "mode buffer not found in mode queue!\n");
2993                 return (0);
2994         }
2995
2996         params->cdb_size = 10;
2997         softc->minimum_command_size = 10;
2998         xpt_print(ccb->ccb_h.path,
2999             "%s(6) failed, increasing minimum CDB size to 10 bytes\n",
3000             (cdb[0] == MODE_SENSE_6) ? "MODE_SENSE" : "MODE_SELECT");
3001
3002         if (cdb[0] == MODE_SENSE_6) {
3003                 struct scsi_mode_sense_10 ms10;
3004                 struct scsi_mode_sense_6 *ms6;
3005                 int len;
3006
3007                 ms6 = (struct scsi_mode_sense_6 *)cdb;
3008
3009                 bzero(&ms10, sizeof(ms10));
3010                 ms10.opcode = MODE_SENSE_10;
3011                 ms10.byte2 = ms6->byte2;
3012                 ms10.page = ms6->page;
3013
3014                 /*
3015                  * 10 byte mode header, block descriptor,
3016                  * sizeof(union cd_pages)
3017                  */
3018                 len = sizeof(struct cd_mode_data_10);
3019                 ccb->csio.dxfer_len = len;
3020
3021                 scsi_ulto2b(len, ms10.length);
3022                 ms10.control = ms6->control;
3023                 bcopy(&ms10, cdb, 10);
3024                 ccb->csio.cdb_len = 10;
3025         } else {
3026                 struct scsi_mode_select_10 ms10;
3027                 struct scsi_mode_select_6 *ms6;
3028                 struct scsi_mode_header_6 *header6;
3029                 struct scsi_mode_header_10 *header10;
3030                 struct scsi_mode_page_header *page_header;
3031                 int blk_desc_len, page_num, page_size, len;
3032
3033                 ms6 = (struct scsi_mode_select_6 *)cdb;
3034
3035                 bzero(&ms10, sizeof(ms10));
3036                 ms10.opcode = MODE_SELECT_10;
3037                 ms10.byte2 = ms6->byte2;
3038
3039                 header6 = (struct scsi_mode_header_6 *)params->mode_buf;
3040                 header10 = (struct scsi_mode_header_10 *)params->mode_buf;
3041
3042                 page_header = find_mode_page_6(header6);
3043                 page_num = page_header->page_code;
3044
3045                 blk_desc_len = header6->blk_desc_len;
3046
3047                 page_size = cdgetpagesize(page_num);
3048
3049                 if (page_size != (page_header->page_length +
3050                     sizeof(*page_header)))
3051                         page_size = page_header->page_length +
3052                                 sizeof(*page_header);
3053
3054                 len = sizeof(*header10) + blk_desc_len + page_size;
3055
3056                 len = min(params->alloc_len, len);
3057
3058                 /*
3059                  * Since the 6 byte parameter header is shorter than the 10
3060                  * byte parameter header, we need to copy the actual mode
3061                  * page data, and the block descriptor, if any, so things wind
3062                  * up in the right place.  The regions will overlap, but
3063                  * bcopy() does the right thing.
3064                  */
3065                 bcopy(params->mode_buf + sizeof(*header6),
3066                       params->mode_buf + sizeof(*header10),
3067                       len - sizeof(*header10));
3068
3069                 /* Make sure these fields are set correctly. */
3070                 scsi_ulto2b(0, header10->data_length);
3071                 header10->medium_type = 0;
3072                 scsi_ulto2b(blk_desc_len, header10->blk_desc_len);
3073
3074                 ccb->csio.dxfer_len = len;
3075
3076                 scsi_ulto2b(len, ms10.length);
3077                 ms10.control = ms6->control;
3078                 bcopy(&ms10, cdb, 10);
3079                 ccb->csio.cdb_len = 10;
3080         }
3081
3082         frozen = (ccb->ccb_h.status & CAM_DEV_QFRZN) != 0;
3083         ccb->ccb_h.status = CAM_REQUEUE_REQ;
3084         xpt_action(ccb);
3085         if (frozen) {
3086                 cam_release_devq(ccb->ccb_h.path,
3087                                  /*relsim_flags*/0,
3088                                  /*openings*/0,
3089                                  /*timeout*/0,
3090                                  /*getcount_only*/0);
3091         }
3092
3093         return (ERESTART);
3094 }
3095
3096 static int
3097 cderror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
3098 {
3099         struct cd_softc *softc;
3100         struct cam_periph *periph;
3101         int error;
3102
3103         periph = xpt_path_periph(ccb->ccb_h.path);
3104         softc = (struct cd_softc *)periph->softc;
3105
3106         error = 0;
3107
3108         /*
3109          * We use a status of CAM_REQ_INVALID as shorthand -- if a 6 byte
3110          * CDB comes back with this particular error, try transforming it
3111          * into the 10 byte version.
3112          */
3113         if ((ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_INVALID) {
3114                 error = cd6byteworkaround(ccb);
3115         } else if (((ccb->ccb_h.status & CAM_STATUS_MASK) ==
3116                      CAM_SCSI_STATUS_ERROR)
3117          && (ccb->ccb_h.status & CAM_AUTOSNS_VALID)
3118          && (ccb->csio.scsi_status == SCSI_STATUS_CHECK_COND)
3119          && ((ccb->ccb_h.flags & CAM_SENSE_PHYS) == 0)
3120          && ((ccb->ccb_h.flags & CAM_SENSE_PTR) == 0)) {
3121                 int sense_key, error_code, asc, ascq;
3122
3123                 scsi_extract_sense(&ccb->csio.sense_data,
3124                                    &error_code, &sense_key, &asc, &ascq);
3125                 if (sense_key == SSD_KEY_ILLEGAL_REQUEST)
3126                         error = cd6byteworkaround(ccb);
3127         }
3128
3129         if (error == ERESTART)
3130                 return (error);
3131
3132         /*
3133          * XXX
3134          * Until we have a better way of doing pack validation,
3135          * don't treat UAs as errors.
3136          */
3137         sense_flags |= SF_RETRY_UA;
3138         return (cam_periph_error(ccb, cam_flags, sense_flags,
3139                                  &softc->saved_ccb));
3140 }
3141
3142 /*
3143  * Read table of contents
3144  */
3145 static int
3146 cdreadtoc(struct cam_periph *periph, u_int32_t mode, u_int32_t start,
3147           u_int8_t *data, u_int32_t len, u_int32_t sense_flags)
3148 {
3149         struct scsi_read_toc *scsi_cmd;
3150         u_int32_t ntoc;
3151         struct ccb_scsiio *csio;
3152         union ccb *ccb;
3153         int error;
3154
3155         ntoc = len;
3156         error = 0;
3157
3158         ccb = cdgetccb(periph, CAM_PRIORITY_NORMAL);
3159
3160         csio = &ccb->csio;
3161
3162         cam_fill_csio(csio,
3163                       /* retries */ cd_retry_count,
3164                       /* cbfcnp */ cddone,
3165                       /* flags */ CAM_DIR_IN,
3166                       /* tag_action */ MSG_SIMPLE_Q_TAG,
3167                       /* data_ptr */ data,
3168                       /* dxfer_len */ len,
3169                       /* sense_len */ SSD_FULL_SIZE,
3170                       sizeof(struct scsi_read_toc),
3171                       /* timeout */ 50000);
3172
3173         scsi_cmd = (struct scsi_read_toc *)&csio->cdb_io.cdb_bytes;
3174         bzero (scsi_cmd, sizeof(*scsi_cmd));
3175
3176         if (mode == CD_MSF_FORMAT)
3177                 scsi_cmd->byte2 |= CD_MSF;
3178         scsi_cmd->from_track = start;
3179         /* scsi_ulto2b(ntoc, (u_int8_t *)scsi_cmd->data_len); */
3180         scsi_cmd->data_len[0] = (ntoc) >> 8;
3181         scsi_cmd->data_len[1] = (ntoc) & 0xff;
3182
3183         scsi_cmd->op_code = READ_TOC;
3184
3185         error = cdrunccb(ccb, cderror, /*cam_flags*/CAM_RETRY_SELTO,
3186                          /*sense_flags*/SF_RETRY_UA | sense_flags);
3187
3188         xpt_release_ccb(ccb);
3189
3190         return(error);
3191 }
3192
3193 static int
3194 cdreadsubchannel(struct cam_periph *periph, u_int32_t mode,
3195                  u_int32_t format, int track,
3196                  struct cd_sub_channel_info *data, u_int32_t len)
3197 {
3198         struct scsi_read_subchannel *scsi_cmd;
3199         struct ccb_scsiio *csio;
3200         union ccb *ccb;
3201         int error;
3202
3203         error = 0;
3204
3205         ccb = cdgetccb(periph, CAM_PRIORITY_NORMAL);
3206
3207         csio = &ccb->csio;
3208
3209         cam_fill_csio(csio,
3210                       /* retries */ cd_retry_count,
3211                       /* cbfcnp */ cddone,
3212                       /* flags */ CAM_DIR_IN,
3213                       /* tag_action */ MSG_SIMPLE_Q_TAG,
3214                       /* data_ptr */ (u_int8_t *)data,
3215                       /* dxfer_len */ len,
3216                       /* sense_len */ SSD_FULL_SIZE,
3217                       sizeof(struct scsi_read_subchannel),
3218                       /* timeout */ 50000);
3219
3220         scsi_cmd = (struct scsi_read_subchannel *)&csio->cdb_io.cdb_bytes;
3221         bzero (scsi_cmd, sizeof(*scsi_cmd));
3222
3223         scsi_cmd->op_code = READ_SUBCHANNEL;
3224         if (mode == CD_MSF_FORMAT)
3225                 scsi_cmd->byte1 |= CD_MSF;
3226         scsi_cmd->byte2 = SRS_SUBQ;
3227         scsi_cmd->subchan_format = format;
3228         scsi_cmd->track = track;
3229         scsi_ulto2b(len, (u_int8_t *)scsi_cmd->data_len);
3230         scsi_cmd->control = 0;
3231
3232         error = cdrunccb(ccb, cderror, /*cam_flags*/CAM_RETRY_SELTO,
3233                          /*sense_flags*/SF_RETRY_UA);
3234
3235         xpt_release_ccb(ccb);
3236
3237         return(error);
3238 }
3239
3240
3241 /*
3242  * All MODE_SENSE requests in the cd(4) driver MUST go through this
3243  * routine.  See comments in cd6byteworkaround() for details.
3244  */
3245 static int
3246 cdgetmode(struct cam_periph *periph, struct cd_mode_params *data,
3247           u_int32_t page)
3248 {
3249         struct ccb_scsiio *csio;
3250         struct cd_softc *softc;
3251         union ccb *ccb;
3252         int param_len;
3253         int error;
3254
3255         softc = (struct cd_softc *)periph->softc;
3256
3257         ccb = cdgetccb(periph, CAM_PRIORITY_NORMAL);
3258
3259         csio = &ccb->csio;
3260
3261         data->cdb_size = softc->minimum_command_size;
3262         if (data->cdb_size < 10)
3263                 param_len = sizeof(struct cd_mode_data);
3264         else
3265                 param_len = sizeof(struct cd_mode_data_10);
3266
3267         /* Don't say we've got more room than we actually allocated */
3268         param_len = min(param_len, data->alloc_len);
3269
3270         scsi_mode_sense_len(csio,
3271                             /* retries */ cd_retry_count,
3272                             /* cbfcnp */ cddone,
3273                             /* tag_action */ MSG_SIMPLE_Q_TAG,
3274                             /* dbd */ 0,
3275                             /* page_code */ SMS_PAGE_CTRL_CURRENT,
3276                             /* page */ page,
3277                             /* param_buf */ data->mode_buf,
3278                             /* param_len */ param_len,
3279                             /* minimum_cmd_size */ softc->minimum_command_size,
3280                             /* sense_len */ SSD_FULL_SIZE,
3281                             /* timeout */ 50000);
3282
3283         /*
3284          * It would be nice not to have to do this, but there's no
3285          * available pointer in the CCB that would allow us to stuff the
3286          * mode params structure in there and retrieve it in
3287          * cd6byteworkaround(), so we can set the cdb size.  The cdb size
3288          * lets the caller know what CDB size we ended up using, so they
3289          * can find the actual mode page offset.
3290          */
3291         STAILQ_INSERT_TAIL(&softc->mode_queue, data, links);
3292
3293         error = cdrunccb(ccb, cderror, /*cam_flags*/CAM_RETRY_SELTO,
3294                          /*sense_flags*/SF_RETRY_UA);
3295
3296         xpt_release_ccb(ccb);
3297
3298         STAILQ_REMOVE(&softc->mode_queue, data, cd_mode_params, links);
3299
3300         /*
3301          * This is a bit of belt-and-suspenders checking, but if we run
3302          * into a situation where the target sends back multiple block
3303          * descriptors, we might not have enough space in the buffer to
3304          * see the whole mode page.  Better to return an error than
3305          * potentially access memory beyond our malloced region.
3306          */
3307         if (error == 0) {
3308                 u_int32_t data_len;
3309
3310                 if (data->cdb_size == 10) {
3311                         struct scsi_mode_header_10 *hdr10;
3312
3313                         hdr10 = (struct scsi_mode_header_10 *)data->mode_buf;
3314                         data_len = scsi_2btoul(hdr10->data_length);
3315                         data_len += sizeof(hdr10->data_length);
3316                 } else {
3317                         struct scsi_mode_header_6 *hdr6;
3318
3319                         hdr6 = (struct scsi_mode_header_6 *)data->mode_buf;
3320                         data_len = hdr6->data_length;
3321                         data_len += sizeof(hdr6->data_length);
3322                 }
3323
3324                 /*
3325                  * Complain if there is more mode data available than we
3326                  * allocated space for.  This could potentially happen if
3327                  * we miscalculated the page length for some reason, if the
3328                  * drive returns multiple block descriptors, or if it sets
3329                  * the data length incorrectly.
3330                  */
3331                 if (data_len > data->alloc_len) {
3332                         xpt_print(periph->path, "allocated modepage %d length "
3333                             "%d < returned length %d\n", page, data->alloc_len,
3334                             data_len);
3335                         error = ENOSPC;
3336                 }
3337         }
3338         return (error);
3339 }
3340
3341 /*
3342  * All MODE_SELECT requests in the cd(4) driver MUST go through this
3343  * routine.  See comments in cd6byteworkaround() for details.
3344  */
3345 static int
3346 cdsetmode(struct cam_periph *periph, struct cd_mode_params *data)
3347 {
3348         struct ccb_scsiio *csio;
3349         struct cd_softc *softc;
3350         union ccb *ccb;
3351         int cdb_size, param_len;
3352         int error;
3353
3354         softc = (struct cd_softc *)periph->softc;
3355
3356         ccb = cdgetccb(periph, CAM_PRIORITY_NORMAL);
3357
3358         csio = &ccb->csio;
3359
3360         error = 0;
3361
3362         /*
3363          * If the data is formatted for the 10 byte version of the mode
3364          * select parameter list, we need to use the 10 byte CDB.
3365          * Otherwise, we use whatever the stored minimum command size.
3366          */
3367         if (data->cdb_size == 10)
3368                 cdb_size = data->cdb_size;
3369         else
3370                 cdb_size = softc->minimum_command_size;
3371
3372         if (cdb_size >= 10) {
3373                 struct scsi_mode_header_10 *mode_header;
3374                 u_int32_t data_len;
3375
3376                 mode_header = (struct scsi_mode_header_10 *)data->mode_buf;
3377
3378                 data_len = scsi_2btoul(mode_header->data_length);
3379
3380                 scsi_ulto2b(0, mode_header->data_length);
3381                 /*
3382                  * SONY drives do not allow a mode select with a medium_type
3383                  * value that has just been returned by a mode sense; use a
3384                  * medium_type of 0 (Default) instead.
3385                  */
3386                 mode_header->medium_type = 0;
3387
3388                 /*
3389                  * Pass back whatever the drive passed to us, plus the size
3390                  * of the data length field.
3391                  */
3392                 param_len = data_len + sizeof(mode_header->data_length);
3393
3394         } else {
3395                 struct scsi_mode_header_6 *mode_header;
3396
3397                 mode_header = (struct scsi_mode_header_6 *)data->mode_buf;
3398
3399                 param_len = mode_header->data_length + 1;
3400
3401                 mode_header->data_length = 0;
3402                 /*
3403                  * SONY drives do not allow a mode select with a medium_type
3404                  * value that has just been returned by a mode sense; use a
3405                  * medium_type of 0 (Default) instead.
3406                  */
3407                 mode_header->medium_type = 0;
3408         }
3409
3410         /* Don't say we've got more room than we actually allocated */
3411         param_len = min(param_len, data->alloc_len);
3412
3413         scsi_mode_select_len(csio,
3414                              /* retries */ cd_retry_count,
3415                              /* cbfcnp */ cddone,
3416                              /* tag_action */ MSG_SIMPLE_Q_TAG,
3417                              /* scsi_page_fmt */ 1,
3418                              /* save_pages */ 0,
3419                              /* param_buf */ data->mode_buf,
3420                              /* param_len */ param_len,
3421                              /* minimum_cmd_size */ cdb_size,
3422                              /* sense_len */ SSD_FULL_SIZE,
3423                              /* timeout */ 50000);
3424
3425         /* See comments in cdgetmode() and cd6byteworkaround(). */
3426         STAILQ_INSERT_TAIL(&softc->mode_queue, data, links);
3427
3428         error = cdrunccb(ccb, cderror, /*cam_flags*/CAM_RETRY_SELTO,
3429                          /*sense_flags*/SF_RETRY_UA);
3430
3431         xpt_release_ccb(ccb);
3432
3433         STAILQ_REMOVE(&softc->mode_queue, data, cd_mode_params, links);
3434
3435         return (error);
3436 }
3437
3438
3439 static int
3440 cdplay(struct cam_periph *periph, u_int32_t blk, u_int32_t len)
3441 {
3442         struct ccb_scsiio *csio;
3443         union ccb *ccb;
3444         int error;
3445         u_int8_t cdb_len;
3446
3447         error = 0;
3448         ccb = cdgetccb(periph, CAM_PRIORITY_NORMAL);
3449         csio = &ccb->csio;
3450         /*
3451          * Use the smallest possible command to perform the operation.
3452          */
3453         if ((len & 0xffff0000) == 0) {
3454                 /*
3455                  * We can fit in a 10 byte cdb.
3456                  */
3457                 struct scsi_play_10 *scsi_cmd;
3458
3459                 scsi_cmd = (struct scsi_play_10 *)&csio->cdb_io.cdb_bytes;
3460                 bzero (scsi_cmd, sizeof(*scsi_cmd));
3461                 scsi_cmd->op_code = PLAY_10;
3462                 scsi_ulto4b(blk, (u_int8_t *)scsi_cmd->blk_addr);
3463                 scsi_ulto2b(len, (u_int8_t *)scsi_cmd->xfer_len);
3464                 cdb_len = sizeof(*scsi_cmd);
3465         } else  {
3466                 struct scsi_play_12 *scsi_cmd;
3467
3468                 scsi_cmd = (struct scsi_play_12 *)&csio->cdb_io.cdb_bytes;
3469                 bzero (scsi_cmd, sizeof(*scsi_cmd));
3470                 scsi_cmd->op_code = PLAY_12;
3471                 scsi_ulto4b(blk, (u_int8_t *)scsi_cmd->blk_addr);
3472                 scsi_ulto4b(len, (u_int8_t *)scsi_cmd->xfer_len);
3473                 cdb_len = sizeof(*scsi_cmd);
3474         }
3475         cam_fill_csio(csio,
3476                       /*retries*/ cd_retry_count,
3477                       cddone,
3478                       /*flags*/CAM_DIR_NONE,
3479                       MSG_SIMPLE_Q_TAG,
3480                       /*dataptr*/NULL,
3481                       /*datalen*/0,
3482                       /*sense_len*/SSD_FULL_SIZE,
3483                       cdb_len,
3484                       /*timeout*/50 * 1000);
3485
3486         error = cdrunccb(ccb, cderror, /*cam_flags*/CAM_RETRY_SELTO,
3487                          /*sense_flags*/SF_RETRY_UA);
3488
3489         xpt_release_ccb(ccb);
3490
3491         return(error);
3492 }
3493
3494 static int
3495 cdplaymsf(struct cam_periph *periph, u_int32_t startm, u_int32_t starts,
3496           u_int32_t startf, u_int32_t endm, u_int32_t ends, u_int32_t endf)
3497 {
3498         struct scsi_play_msf *scsi_cmd;
3499         struct ccb_scsiio *csio;
3500         union ccb *ccb;
3501         int error;
3502
3503         error = 0;
3504
3505         ccb = cdgetccb(periph, CAM_PRIORITY_NORMAL);
3506
3507         csio = &ccb->csio;
3508
3509         cam_fill_csio(csio,
3510                       /* retries */ cd_retry_count,
3511                       /* cbfcnp */ cddone,
3512                       /* flags */ CAM_DIR_NONE,
3513                       /* tag_action */ MSG_SIMPLE_Q_TAG,
3514                       /* data_ptr */ NULL,
3515                       /* dxfer_len */ 0,
3516                       /* sense_len */ SSD_FULL_SIZE,
3517                       sizeof(struct scsi_play_msf),
3518                       /* timeout */ 50000);
3519
3520         scsi_cmd = (struct scsi_play_msf *)&csio->cdb_io.cdb_bytes;
3521         bzero (scsi_cmd, sizeof(*scsi_cmd));
3522
3523         scsi_cmd->op_code = PLAY_MSF;
3524         scsi_cmd->start_m = startm;
3525         scsi_cmd->start_s = starts;
3526         scsi_cmd->start_f = startf;
3527         scsi_cmd->end_m = endm;
3528         scsi_cmd->end_s = ends;
3529         scsi_cmd->end_f = endf;
3530
3531         error = cdrunccb(ccb, cderror, /*cam_flags*/CAM_RETRY_SELTO,
3532                          /*sense_flags*/SF_RETRY_UA);
3533
3534         xpt_release_ccb(ccb);
3535
3536         return(error);
3537 }
3538
3539
3540 static int
3541 cdplaytracks(struct cam_periph *periph, u_int32_t strack, u_int32_t sindex,
3542              u_int32_t etrack, u_int32_t eindex)
3543 {
3544         struct scsi_play_track *scsi_cmd;
3545         struct ccb_scsiio *csio;
3546         union ccb *ccb;
3547         int error;
3548
3549         error = 0;
3550
3551         ccb = cdgetccb(periph, CAM_PRIORITY_NORMAL);
3552
3553         csio = &ccb->csio;
3554
3555         cam_fill_csio(csio,
3556                       /* retries */ cd_retry_count,
3557                       /* cbfcnp */ cddone,
3558                       /* flags */ CAM_DIR_NONE,
3559                       /* tag_action */ MSG_SIMPLE_Q_TAG,
3560                       /* data_ptr */ NULL,
3561                       /* dxfer_len */ 0,
3562                       /* sense_len */ SSD_FULL_SIZE,
3563                       sizeof(struct scsi_play_track),
3564                       /* timeout */ 50000);
3565
3566         scsi_cmd = (struct scsi_play_track *)&csio->cdb_io.cdb_bytes;
3567         bzero (scsi_cmd, sizeof(*scsi_cmd));
3568
3569         scsi_cmd->op_code = PLAY_TRACK;
3570         scsi_cmd->start_track = strack;
3571         scsi_cmd->start_index = sindex;
3572         scsi_cmd->end_track = etrack;
3573         scsi_cmd->end_index = eindex;
3574
3575         error = cdrunccb(ccb, cderror, /*cam_flags*/CAM_RETRY_SELTO,
3576                          /*sense_flags*/SF_RETRY_UA);
3577
3578         xpt_release_ccb(ccb);
3579
3580         return(error);
3581 }
3582
3583 static int
3584 cdpause(struct cam_periph *periph, u_int32_t go)
3585 {
3586         struct scsi_pause *scsi_cmd;
3587         struct ccb_scsiio *csio;
3588         union ccb *ccb;
3589         int error;
3590
3591         error = 0;
3592
3593         ccb = cdgetccb(periph, CAM_PRIORITY_NORMAL);
3594
3595         csio = &ccb->csio;
3596
3597         cam_fill_csio(csio,
3598                       /* retries */ cd_retry_count,
3599                       /* cbfcnp */ cddone,
3600                       /* flags */ CAM_DIR_NONE,
3601                       /* tag_action */ MSG_SIMPLE_Q_TAG,
3602                       /* data_ptr */ NULL,
3603                       /* dxfer_len */ 0,
3604                       /* sense_len */ SSD_FULL_SIZE,
3605                       sizeof(struct scsi_pause),
3606                       /* timeout */ 50000);
3607
3608         scsi_cmd = (struct scsi_pause *)&csio->cdb_io.cdb_bytes;
3609         bzero (scsi_cmd, sizeof(*scsi_cmd));
3610
3611         scsi_cmd->op_code = PAUSE;
3612         scsi_cmd->resume = go;
3613
3614         error = cdrunccb(ccb, cderror, /*cam_flags*/CAM_RETRY_SELTO,
3615                          /*sense_flags*/SF_RETRY_UA);
3616
3617         xpt_release_ccb(ccb);
3618
3619         return(error);
3620 }
3621
3622 static int
3623 cdstartunit(struct cam_periph *periph, int load)
3624 {
3625         union ccb *ccb;
3626         int error;
3627
3628         error = 0;
3629
3630         ccb = cdgetccb(periph, CAM_PRIORITY_NORMAL);
3631
3632         scsi_start_stop(&ccb->csio,
3633                         /* retries */ cd_retry_count,
3634                         /* cbfcnp */ cddone,
3635                         /* tag_action */ MSG_SIMPLE_Q_TAG,
3636                         /* start */ TRUE,
3637                         /* load_eject */ load,
3638                         /* immediate */ FALSE,
3639                         /* sense_len */ SSD_FULL_SIZE,
3640                         /* timeout */ 50000);
3641
3642         error = cdrunccb(ccb, cderror, /*cam_flags*/CAM_RETRY_SELTO,
3643                          /*sense_flags*/SF_RETRY_UA);
3644
3645         xpt_release_ccb(ccb);
3646
3647         return(error);
3648 }
3649
3650 static int
3651 cdstopunit(struct cam_periph *periph, u_int32_t eject)
3652 {
3653         union ccb *ccb;
3654         int error;
3655
3656         error = 0;
3657
3658         ccb = cdgetccb(periph, CAM_PRIORITY_NORMAL);
3659
3660         scsi_start_stop(&ccb->csio,
3661                         /* retries */ cd_retry_count,
3662                         /* cbfcnp */ cddone,
3663                         /* tag_action */ MSG_SIMPLE_Q_TAG,
3664                         /* start */ FALSE,
3665                         /* load_eject */ eject,
3666                         /* immediate */ FALSE,
3667                         /* sense_len */ SSD_FULL_SIZE,
3668                         /* timeout */ 50000);
3669
3670         error = cdrunccb(ccb, cderror, /*cam_flags*/CAM_RETRY_SELTO,
3671                          /*sense_flags*/SF_RETRY_UA);
3672
3673         xpt_release_ccb(ccb);
3674
3675         return(error);
3676 }
3677
3678 static int
3679 cdsetspeed(struct cam_periph *periph, u_int32_t rdspeed, u_int32_t wrspeed)
3680 {
3681         struct scsi_set_speed *scsi_cmd;
3682         struct ccb_scsiio *csio;
3683         union ccb *ccb;
3684         int error;
3685
3686         error = 0;
3687         ccb = cdgetccb(periph, CAM_PRIORITY_NORMAL);
3688         csio = &ccb->csio;
3689
3690         /* Preserve old behavior: units in multiples of CDROM speed */
3691         if (rdspeed < 177)
3692                 rdspeed *= 177;
3693         if (wrspeed < 177)
3694                 wrspeed *= 177;
3695
3696         cam_fill_csio(csio,
3697                       /* retries */ cd_retry_count,
3698                       /* cbfcnp */ cddone,
3699                       /* flags */ CAM_DIR_NONE,
3700                       /* tag_action */ MSG_SIMPLE_Q_TAG,
3701                       /* data_ptr */ NULL,
3702                       /* dxfer_len */ 0,
3703                       /* sense_len */ SSD_FULL_SIZE,
3704                       sizeof(struct scsi_set_speed),
3705                       /* timeout */ 50000);
3706
3707         scsi_cmd = (struct scsi_set_speed *)&csio->cdb_io.cdb_bytes;
3708         bzero(scsi_cmd, sizeof(*scsi_cmd));
3709
3710         scsi_cmd->opcode = SET_CD_SPEED;
3711         scsi_ulto2b(rdspeed, scsi_cmd->readspeed);
3712         scsi_ulto2b(wrspeed, scsi_cmd->writespeed);
3713
3714         error = cdrunccb(ccb, cderror, /*cam_flags*/CAM_RETRY_SELTO,
3715                          /*sense_flags*/SF_RETRY_UA);
3716
3717         xpt_release_ccb(ccb);
3718
3719         return(error);
3720 }
3721
3722 static int
3723 cdreportkey(struct cam_periph *periph, struct dvd_authinfo *authinfo)
3724 {
3725         union ccb *ccb;
3726         u_int8_t *databuf;
3727         u_int32_t lba;
3728         int error;
3729         int length;
3730
3731         error = 0;
3732         databuf = NULL;
3733         lba = 0;
3734
3735         ccb = cdgetccb(periph, CAM_PRIORITY_NORMAL);
3736
3737         switch (authinfo->format) {
3738         case DVD_REPORT_AGID:
3739                 length = sizeof(struct scsi_report_key_data_agid);
3740                 break;
3741         case DVD_REPORT_CHALLENGE:
3742                 length = sizeof(struct scsi_report_key_data_challenge);
3743                 break;
3744         case DVD_REPORT_KEY1:
3745                 length = sizeof(struct scsi_report_key_data_key1_key2);
3746                 break;
3747         case DVD_REPORT_TITLE_KEY:
3748                 length = sizeof(struct scsi_report_key_data_title);
3749                 /* The lba field is only set for the title key */
3750                 lba = authinfo->lba;
3751                 break;
3752         case DVD_REPORT_ASF:
3753                 length = sizeof(struct scsi_report_key_data_asf);
3754                 break;
3755         case DVD_REPORT_RPC:
3756                 length = sizeof(struct scsi_report_key_data_rpc);
3757                 break;
3758         case DVD_INVALIDATE_AGID:
3759                 length = 0;
3760                 break;
3761         default:
3762                 error = EINVAL;
3763                 goto bailout;
3764                 break; /* NOTREACHED */
3765         }
3766
3767         if (length != 0) {
3768                 databuf = malloc(length, M_DEVBUF, M_WAITOK | M_ZERO);
3769         } else
3770                 databuf = NULL;
3771
3772
3773         scsi_report_key(&ccb->csio,
3774                         /* retries */ cd_retry_count,
3775                         /* cbfcnp */ cddone,
3776                         /* tag_action */ MSG_SIMPLE_Q_TAG,
3777                         /* lba */ lba,
3778                         /* agid */ authinfo->agid,
3779                         /* key_format */ authinfo->format,
3780                         /* data_ptr */ databuf,
3781                         /* dxfer_len */ length,
3782                         /* sense_len */ SSD_FULL_SIZE,
3783                         /* timeout */ 50000);
3784
3785         error = cdrunccb(ccb, cderror, /*cam_flags*/CAM_RETRY_SELTO,
3786                          /*sense_flags*/SF_RETRY_UA);
3787
3788         if (error != 0)
3789                 goto bailout;
3790
3791         if (ccb->csio.resid != 0) {
3792                 xpt_print(periph->path, "warning, residual for report key "
3793                     "command is %d\n", ccb->csio.resid);
3794         }
3795
3796         switch(authinfo->format) {
3797         case DVD_REPORT_AGID: {
3798                 struct scsi_report_key_data_agid *agid_data;
3799
3800                 agid_data = (struct scsi_report_key_data_agid *)databuf;
3801
3802                 authinfo->agid = (agid_data->agid & RKD_AGID_MASK) >>
3803                         RKD_AGID_SHIFT;
3804                 break;
3805         }
3806         case DVD_REPORT_CHALLENGE: {
3807                 struct scsi_report_key_data_challenge *chal_data;
3808
3809                 chal_data = (struct scsi_report_key_data_challenge *)databuf;
3810
3811                 bcopy(chal_data->challenge_key, authinfo->keychal,
3812                       min(sizeof(chal_data->challenge_key),
3813                           sizeof(authinfo->keychal)));
3814                 break;
3815         }
3816         case DVD_REPORT_KEY1: {
3817                 struct scsi_report_key_data_key1_key2 *key1_data;
3818
3819                 key1_data = (struct scsi_report_key_data_key1_key2 *)databuf;
3820
3821                 bcopy(key1_data->key1, authinfo->keychal,
3822                       min(sizeof(key1_data->key1), sizeof(authinfo->keychal)));
3823                 break;
3824         }
3825         case DVD_REPORT_TITLE_KEY: {
3826                 struct scsi_report_key_data_title *title_data;
3827
3828                 title_data = (struct scsi_report_key_data_title *)databuf;
3829
3830                 authinfo->cpm = (title_data->byte0 & RKD_TITLE_CPM) >>
3831                         RKD_TITLE_CPM_SHIFT;
3832                 authinfo->cp_sec = (title_data->byte0 & RKD_TITLE_CP_SEC) >>
3833                         RKD_TITLE_CP_SEC_SHIFT;
3834                 authinfo->cgms = (title_data->byte0 & RKD_TITLE_CMGS_MASK) >>
3835                         RKD_TITLE_CMGS_SHIFT;
3836                 bcopy(title_data->title_key, authinfo->keychal,
3837                       min(sizeof(title_data->title_key),
3838                           sizeof(authinfo->keychal)));
3839                 break;
3840         }
3841         case DVD_REPORT_ASF: {
3842                 struct scsi_report_key_data_asf *asf_data;
3843
3844                 asf_data = (struct scsi_report_key_data_asf *)databuf;
3845
3846                 authinfo->asf = asf_data->success & RKD_ASF_SUCCESS;
3847                 break;
3848         }
3849         case DVD_REPORT_RPC: {
3850                 struct scsi_report_key_data_rpc *rpc_data;
3851
3852                 rpc_data = (struct scsi_report_key_data_rpc *)databuf;
3853
3854                 authinfo->reg_type = (rpc_data->byte4 & RKD_RPC_TYPE_MASK) >>
3855                         RKD_RPC_TYPE_SHIFT;
3856                 authinfo->vend_rsts =
3857                         (rpc_data->byte4 & RKD_RPC_VENDOR_RESET_MASK) >>
3858                         RKD_RPC_VENDOR_RESET_SHIFT;
3859                 authinfo->user_rsts = rpc_data->byte4 & RKD_RPC_USER_RESET_MASK;
3860                 authinfo->region = rpc_data->region_mask;
3861                 authinfo->rpc_scheme = rpc_data->rpc_scheme1;
3862                 break;
3863         }
3864         case DVD_INVALIDATE_AGID:
3865                 break;
3866         default:
3867                 /* This should be impossible, since we checked above */
3868                 error = EINVAL;
3869                 goto bailout;
3870                 break; /* NOTREACHED */
3871         }
3872 bailout:
3873         if (databuf != NULL)
3874                 free(databuf, M_DEVBUF);
3875
3876         xpt_release_ccb(ccb);
3877
3878         return(error);
3879 }
3880
3881 static int
3882 cdsendkey(struct cam_periph *periph, struct dvd_authinfo *authinfo)
3883 {
3884         union ccb *ccb;
3885         u_int8_t *databuf;
3886         int length;
3887         int error;
3888
3889         error = 0;
3890         databuf = NULL;
3891
3892         ccb = cdgetccb(periph, CAM_PRIORITY_NORMAL);
3893
3894         switch(authinfo->format) {
3895         case DVD_SEND_CHALLENGE: {
3896                 struct scsi_report_key_data_challenge *challenge_data;
3897
3898                 length = sizeof(*challenge_data);
3899
3900                 challenge_data = malloc(length, M_DEVBUF, M_WAITOK | M_ZERO);
3901
3902                 databuf = (u_int8_t *)challenge_data;
3903
3904                 scsi_ulto2b(length - sizeof(challenge_data->data_len),
3905                             challenge_data->data_len);
3906
3907                 bcopy(authinfo->keychal, challenge_data->challenge_key,
3908                       min(sizeof(authinfo->keychal),
3909                           sizeof(challenge_data->challenge_key)));
3910                 break;
3911         }
3912         case DVD_SEND_KEY2: {
3913                 struct scsi_report_key_data_key1_key2 *key2_data;
3914
3915                 length = sizeof(*key2_data);
3916
3917                 key2_data = malloc(length, M_DEVBUF, M_WAITOK | M_ZERO);
3918
3919                 databuf = (u_int8_t *)key2_data;
3920
3921                 scsi_ulto2b(length - sizeof(key2_data->data_len),
3922                             key2_data->data_len);
3923
3924                 bcopy(authinfo->keychal, key2_data->key1,
3925                       min(sizeof(authinfo->keychal), sizeof(key2_data->key1)));
3926
3927                 break;
3928         }
3929         case DVD_SEND_RPC: {
3930                 struct scsi_send_key_data_rpc *rpc_data;
3931
3932                 length = sizeof(*rpc_data);
3933
3934                 rpc_data = malloc(length, M_DEVBUF, M_WAITOK | M_ZERO);
3935
3936                 databuf = (u_int8_t *)rpc_data;
3937
3938                 scsi_ulto2b(length - sizeof(rpc_data->data_len),
3939                             rpc_data->data_len);
3940
3941                 rpc_data->region_code = authinfo->region;
3942                 break;
3943         }
3944         default:
3945                 error = EINVAL;
3946                 goto bailout;
3947                 break; /* NOTREACHED */
3948         }
3949
3950         scsi_send_key(&ccb->csio,
3951                       /* retries */ cd_retry_count,
3952                       /* cbfcnp */ cddone,
3953                       /* tag_action */ MSG_SIMPLE_Q_TAG,
3954                       /* agid */ authinfo->agid,
3955                       /* key_format */ authinfo->format,
3956                       /* data_ptr */ databuf,
3957                       /* dxfer_len */ length,
3958                       /* sense_len */ SSD_FULL_SIZE,
3959                       /* timeout */ 50000);
3960
3961         error = cdrunccb(ccb, cderror, /*cam_flags*/CAM_RETRY_SELTO,
3962                          /*sense_flags*/SF_RETRY_UA);
3963
3964 bailout:
3965
3966         if (databuf != NULL)
3967                 free(databuf, M_DEVBUF);
3968
3969         xpt_release_ccb(ccb);
3970
3971         return(error);
3972 }
3973
3974 static int
3975 cdreaddvdstructure(struct cam_periph *periph, struct dvd_struct *dvdstruct)
3976 {
3977         union ccb *ccb;
3978         u_int8_t *databuf;
3979         u_int32_t address;
3980         int error;
3981         int length;
3982
3983         error = 0;
3984         databuf = NULL;
3985         /* The address is reserved for many of the formats */
3986         address = 0;
3987
3988         ccb = cdgetccb(periph, CAM_PRIORITY_NORMAL);
3989
3990         switch(dvdstruct->format) {
3991         case DVD_STRUCT_PHYSICAL:
3992                 length = sizeof(struct scsi_read_dvd_struct_data_physical);
3993                 break;
3994         case DVD_STRUCT_COPYRIGHT:
3995                 length = sizeof(struct scsi_read_dvd_struct_data_copyright);
3996                 break;
3997         case DVD_STRUCT_DISCKEY:
3998                 length = sizeof(struct scsi_read_dvd_struct_data_disc_key);
3999                 break;
4000         case DVD_STRUCT_BCA:
4001                 length = sizeof(struct scsi_read_dvd_struct_data_bca);
4002                 break;
4003         case DVD_STRUCT_MANUFACT:
4004                 length = sizeof(struct scsi_read_dvd_struct_data_manufacturer);
4005                 break;
4006         case DVD_STRUCT_CMI:
4007                 error = ENODEV;
4008                 goto bailout;
4009 #ifdef notyet
4010                 length = sizeof(struct scsi_read_dvd_struct_data_copy_manage);
4011                 address = dvdstruct->address;
4012 #endif
4013                 break; /* NOTREACHED */
4014         case DVD_STRUCT_PROTDISCID:
4015                 length = sizeof(struct scsi_read_dvd_struct_data_prot_discid);
4016                 break;
4017         case DVD_STRUCT_DISCKEYBLOCK:
4018                 length = sizeof(struct scsi_read_dvd_struct_data_disc_key_blk);
4019                 break;
4020         case DVD_STRUCT_DDS:
4021                 length = sizeof(struct scsi_read_dvd_struct_data_dds);
4022                 break;
4023         case DVD_STRUCT_MEDIUM_STAT:
4024                 length = sizeof(struct scsi_read_dvd_struct_data_medium_status);
4025                 break;
4026         case DVD_STRUCT_SPARE_AREA:
4027                 length = sizeof(struct scsi_read_dvd_struct_data_spare_area);
4028                 break;
4029         case DVD_STRUCT_RMD_LAST:
4030                 error = ENODEV;
4031                 goto bailout;
4032 #ifdef notyet
4033                 length = sizeof(struct scsi_read_dvd_struct_data_rmd_borderout);
4034                 address = dvdstruct->address;
4035 #endif
4036                 break; /* NOTREACHED */
4037         case DVD_STRUCT_RMD_RMA:
4038                 error = ENODEV;
4039                 goto bailout;
4040 #ifdef notyet
4041                 length = sizeof(struct scsi_read_dvd_struct_data_rmd);
4042                 address = dvdstruct->address;
4043 #endif
4044                 break; /* NOTREACHED */
4045         case DVD_STRUCT_PRERECORDED:
4046                 length = sizeof(struct scsi_read_dvd_struct_data_leadin);
4047                 break;
4048         case DVD_STRUCT_UNIQUEID:
4049                 length = sizeof(struct scsi_read_dvd_struct_data_disc_id);
4050                 break;
4051         case DVD_STRUCT_DCB:
4052                 error = ENODEV;
4053                 goto bailout;
4054 #ifdef notyet
4055                 length = sizeof(struct scsi_read_dvd_struct_data_dcb);
4056                 address = dvdstruct->address;
4057 #endif
4058                 break; /* NOTREACHED */
4059         case DVD_STRUCT_LIST:
4060                 /*
4061                  * This is the maximum allocation length for the READ DVD
4062                  * STRUCTURE command.  There's nothing in the MMC3 spec
4063                  * that indicates a limit in the amount of data that can
4064                  * be returned from this call, other than the limits
4065                  * imposed by the 2-byte length variables.
4066                  */
4067                 length = 65535;
4068                 break;
4069         default:
4070                 error = EINVAL;
4071                 goto bailout;
4072                 break; /* NOTREACHED */
4073         }
4074
4075         if (length != 0) {
4076                 databuf = malloc(length, M_DEVBUF, M_WAITOK | M_ZERO);
4077         } else
4078                 databuf = NULL;
4079
4080         scsi_read_dvd_structure(&ccb->csio,
4081                                 /* retries */ cd_retry_count,
4082                                 /* cbfcnp */ cddone,
4083                                 /* tag_action */ MSG_SIMPLE_Q_TAG,
4084                                 /* lba */ address,
4085                                 /* layer_number */ dvdstruct->layer_num,
4086                                 /* key_format */ dvdstruct->format,
4087                                 /* agid */ dvdstruct->agid,
4088                                 /* data_ptr */ databuf,
4089                                 /* dxfer_len */ length,
4090                                 /* sense_len */ SSD_FULL_SIZE,
4091                                 /* timeout */ 50000);
4092
4093         error = cdrunccb(ccb, cderror, /*cam_flags*/CAM_RETRY_SELTO,
4094                          /*sense_flags*/SF_RETRY_UA);
4095
4096         if (error != 0)
4097                 goto bailout;
4098
4099         switch(dvdstruct->format) {
4100         case DVD_STRUCT_PHYSICAL: {
4101                 struct scsi_read_dvd_struct_data_layer_desc *inlayer;
4102                 struct dvd_layer *outlayer;
4103                 struct scsi_read_dvd_struct_data_physical *phys_data;
4104
4105                 phys_data =
4106                         (struct scsi_read_dvd_struct_data_physical *)databuf;
4107                 inlayer = &phys_data->layer_desc;
4108                 outlayer = (struct dvd_layer *)&dvdstruct->data;
4109
4110                 dvdstruct->length = sizeof(*inlayer);
4111
4112                 outlayer->book_type = (inlayer->book_type_version &
4113                         RDSD_BOOK_TYPE_MASK) >> RDSD_BOOK_TYPE_SHIFT;
4114                 outlayer->book_version = (inlayer->book_type_version &
4115                         RDSD_BOOK_VERSION_MASK);
4116                 outlayer->disc_size = (inlayer->disc_size_max_rate &
4117                         RDSD_DISC_SIZE_MASK) >> RDSD_DISC_SIZE_SHIFT;
4118                 outlayer->max_rate = (inlayer->disc_size_max_rate &
4119                         RDSD_MAX_RATE_MASK);
4120                 outlayer->nlayers = (inlayer->layer_info &
4121                         RDSD_NUM_LAYERS_MASK) >> RDSD_NUM_LAYERS_SHIFT;
4122                 outlayer->track_path = (inlayer->layer_info &
4123                         RDSD_TRACK_PATH_MASK) >> RDSD_TRACK_PATH_SHIFT;
4124                 outlayer->layer_type = (inlayer->layer_info &
4125                         RDSD_LAYER_TYPE_MASK);
4126                 outlayer->linear_density = (inlayer->density &
4127                         RDSD_LIN_DENSITY_MASK) >> RDSD_LIN_DENSITY_SHIFT;
4128                 outlayer->track_density = (inlayer->density &
4129                         RDSD_TRACK_DENSITY_MASK);
4130                 outlayer->bca = (inlayer->bca & RDSD_BCA_MASK) >>
4131                         RDSD_BCA_SHIFT;
4132                 outlayer->start_sector = scsi_3btoul(inlayer->main_data_start);
4133                 outlayer->end_sector = scsi_3btoul(inlayer->main_data_end);
4134                 outlayer->end_sector_l0 =
4135                         scsi_3btoul(inlayer->end_sector_layer0);
4136                 break;
4137         }
4138         case DVD_STRUCT_COPYRIGHT: {
4139                 struct scsi_read_dvd_struct_data_copyright *copy_data;
4140
4141                 copy_data = (struct scsi_read_dvd_struct_data_copyright *)
4142                         databuf;
4143
4144                 dvdstruct->cpst = copy_data->cps_type;
4145                 dvdstruct->rmi = copy_data->region_info;
4146                 dvdstruct->length = 0;
4147
4148                 break;
4149         }
4150         default:
4151                 /*
4152                  * Tell the user what the overall length is, no matter
4153                  * what we can actually fit in the data buffer.
4154                  */
4155                 dvdstruct->length = length - ccb->csio.resid -
4156                         sizeof(struct scsi_read_dvd_struct_data_header);
4157
4158                 /*
4159                  * But only actually copy out the smaller of what we read
4160                  * in or what the structure can take.
4161                  */
4162                 bcopy(databuf + sizeof(struct scsi_read_dvd_struct_data_header),
4163                       dvdstruct->data,
4164                       min(sizeof(dvdstruct->data), dvdstruct->length));
4165                 break;
4166         }
4167 bailout:
4168
4169         if (databuf != NULL)
4170                 free(databuf, M_DEVBUF);
4171
4172         xpt_release_ccb(ccb);
4173
4174         return(error);
4175 }
4176
4177 void
4178 scsi_report_key(struct ccb_scsiio *csio, u_int32_t retries,
4179                 void (*cbfcnp)(struct cam_periph *, union ccb *),
4180                 u_int8_t tag_action, u_int32_t lba, u_int8_t agid,
4181                 u_int8_t key_format, u_int8_t *data_ptr, u_int32_t dxfer_len,
4182                 u_int8_t sense_len, u_int32_t timeout)
4183 {
4184         struct scsi_report_key *scsi_cmd;
4185
4186         scsi_cmd = (struct scsi_report_key *)&csio->cdb_io.cdb_bytes;
4187         bzero(scsi_cmd, sizeof(*scsi_cmd));
4188         scsi_cmd->opcode = REPORT_KEY;
4189         scsi_ulto4b(lba, scsi_cmd->lba);
4190         scsi_ulto2b(dxfer_len, scsi_cmd->alloc_len);
4191         scsi_cmd->agid_keyformat = (agid << RK_KF_AGID_SHIFT) |
4192                 (key_format & RK_KF_KEYFORMAT_MASK);
4193
4194         cam_fill_csio(csio,
4195                       retries,
4196                       cbfcnp,
4197                       /*flags*/ (dxfer_len == 0) ? CAM_DIR_NONE : CAM_DIR_IN,
4198                       tag_action,
4199                       /*data_ptr*/ data_ptr,
4200                       /*dxfer_len*/ dxfer_len,
4201                       sense_len,
4202                       sizeof(*scsi_cmd),
4203                       timeout);
4204 }
4205
4206 void
4207 scsi_send_key(struct ccb_scsiio *csio, u_int32_t retries,
4208               void (*cbfcnp)(struct cam_periph *, union ccb *),
4209               u_int8_t tag_action, u_int8_t agid, u_int8_t key_format,
4210               u_int8_t *data_ptr, u_int32_t dxfer_len, u_int8_t sense_len,
4211               u_int32_t timeout)
4212 {
4213         struct scsi_send_key *scsi_cmd;
4214
4215         scsi_cmd = (struct scsi_send_key *)&csio->cdb_io.cdb_bytes;
4216         bzero(scsi_cmd, sizeof(*scsi_cmd));
4217         scsi_cmd->opcode = SEND_KEY;
4218
4219         scsi_ulto2b(dxfer_len, scsi_cmd->param_len);
4220         scsi_cmd->agid_keyformat = (agid << RK_KF_AGID_SHIFT) |
4221                 (key_format & RK_KF_KEYFORMAT_MASK);
4222
4223         cam_fill_csio(csio,
4224                       retries,
4225                       cbfcnp,
4226                       /*flags*/ CAM_DIR_OUT,
4227                       tag_action,
4228                       /*data_ptr*/ data_ptr,
4229                       /*dxfer_len*/ dxfer_len,
4230                       sense_len,
4231                       sizeof(*scsi_cmd),
4232                       timeout);
4233 }
4234
4235
4236 void
4237 scsi_read_dvd_structure(struct ccb_scsiio *csio, u_int32_t retries,
4238                         void (*cbfcnp)(struct cam_periph *, union ccb *),
4239                         u_int8_t tag_action, u_int32_t address,
4240                         u_int8_t layer_number, u_int8_t format, u_int8_t agid,
4241                         u_int8_t *data_ptr, u_int32_t dxfer_len,
4242                         u_int8_t sense_len, u_int32_t timeout)
4243 {
4244         struct scsi_read_dvd_structure *scsi_cmd;
4245
4246         scsi_cmd = (struct scsi_read_dvd_structure *)&csio->cdb_io.cdb_bytes;
4247         bzero(scsi_cmd, sizeof(*scsi_cmd));
4248         scsi_cmd->opcode = READ_DVD_STRUCTURE;
4249
4250         scsi_ulto4b(address, scsi_cmd->address);
4251         scsi_cmd->layer_number = layer_number;
4252         scsi_cmd->format = format;
4253         scsi_ulto2b(dxfer_len, scsi_cmd->alloc_len);
4254         /* The AGID is the top two bits of this byte */
4255         scsi_cmd->agid = agid << 6;
4256
4257         cam_fill_csio(csio,
4258                       retries,
4259                       cbfcnp,
4260                       /*flags*/ CAM_DIR_IN,
4261                       tag_action,
4262                       /*data_ptr*/ data_ptr,
4263                       /*dxfer_len*/ dxfer_len,
4264                       sense_len,
4265                       sizeof(*scsi_cmd),
4266                       timeout);
4267 }