/*      $OpenBSD: cd.c,v 1.267 2025/11/23 10:32:47 sf Exp $     */
/*      $NetBSD: cd.c,v 1.100 1997/04/02 02:29:30 mycroft Exp $ */

/*
 * Copyright (c) 1994, 1995, 1997 Charles M. Hannum.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Charles M. Hannum.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * Originally written by Julian Elischer (julian@tfs.com)
 * for TRW Financial Systems for use under the MACH(2.5) operating system.
 *
 * TRW Financial Systems, in accordance with their agreement with Carnegie
 * Mellon University, makes this software available to CMU to distribute
 * or use in any manner that they see fit as long as this message is kept with
 * the software. For this reason TFS also grants any other persons or
 * organisations permission to use or modify this software.
 *
 * TFS supplies this software to be publicly redistributed
 * on the understanding that TFS is not responsible for the correct
 * functioning of this software in any circumstances.
 *
 * Ported to run under 386BSD by Julian Elischer (julian@tfs.com) Sept 1992
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/timeout.h>
#include <sys/fcntl.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/mtio.h>
#include <sys/buf.h>
#include <sys/uio.h>
#include <sys/malloc.h>
#include <sys/pool.h>
#include <sys/errno.h>
#include <sys/device.h>
#include <sys/disklabel.h>
#include <sys/disk.h>
#include <sys/cdio.h>
#include <sys/conf.h>
#include <sys/scsiio.h>
#include <sys/dkio.h>
#include <sys/vnode.h>

#include <scsi/scsi_all.h>
#include <scsi/cd.h>
#include <scsi/scsi_debug.h>
#include <scsi/scsi_disk.h>     /* rw_10 and start_stop come from there */
#include <scsi/scsiconf.h>


#include <ufs/ffs/fs.h>         /* for BBSIZE and SBSIZE */

#define CDOUTSTANDING   4

#define MAXTRACK        99
#define CD_FRAMES       75
#define CD_SECS         60

struct cd_toc {
        struct ioc_toc_header header;
        struct cd_toc_entry entries[MAXTRACK+1];        /* One extra for the */
                                                        /* leadout */
};

int     cdmatch(struct device *, void *, void *);
void    cdattach(struct device *, struct device *, void *);
int     cdactivate(struct device *, int);
int     cddetach(struct device *, int);

struct cd_softc {
        struct device            sc_dev;
        struct disk              sc_dk;

        int                      sc_flags;
#define CDF_DYING       0x40            /* dying, when deactivated */
        struct scsi_link        *sc_link;       /* contains targ, lun, etc. */
        struct cd_parms {
                u_int32_t secsize;
                u_int64_t disksize;     /* total number sectors */
        }                        params;
        struct bufq              sc_bufq;
        struct scsi_xshandler    sc_xsh;
};

void    cdstart(struct scsi_xfer *);
void    cd_buf_done(struct scsi_xfer *);
int     cd_cmd_rw6(struct scsi_generic *, int, u_int64_t, u_int32_t);
int     cd_cmd_rw10(struct scsi_generic *, int, u_int64_t, u_int32_t);
int     cd_cmd_rw12(struct scsi_generic *, int, u_int64_t, u_int32_t);
void    cdminphys(struct buf *);
int     cdgetdisklabel(dev_t, struct cd_softc *, struct disklabel *, int);
int     cd_setchan(struct cd_softc *, int, int, int, int, int);
int     cd_getvol(struct cd_softc *cd, struct ioc_vol *, int);
int     cd_setvol(struct cd_softc *, const struct ioc_vol *, int);
int     cd_load_unload(struct cd_softc *, int, int);
int     cd_set_pa_immed(struct cd_softc *, int);
int     cd_play(struct cd_softc *, int, int);
int     cd_play_tracks(struct cd_softc *, int, int, int, int);
int     cd_play_msf(struct cd_softc *, int, int, int, int, int, int);
int     cd_pause(struct cd_softc *, int);
int     cd_reset(struct cd_softc *);
int     cd_read_subchannel(struct cd_softc *, int, int, int,
            struct cd_sub_channel_info *, int );
int     cd_read_toc(struct cd_softc *, int, int, void *, int, int);
int     cd_get_parms(struct cd_softc *, int);
int     cd_load_toc(struct cd_softc *, struct cd_toc *, int);
int     cd_interpret_sense(struct scsi_xfer *);
u_int64_t cd_size(struct scsi_link *, int, u_int32_t *);

int     dvd_auth(struct cd_softc *, union dvd_authinfo *);
int     dvd_read_physical(struct cd_softc *, union dvd_struct *);
int     dvd_read_copyright(struct cd_softc *, union dvd_struct *);
int     dvd_read_disckey(struct cd_softc *, union dvd_struct *);
int     dvd_read_bca(struct cd_softc *, union dvd_struct *);
int     dvd_read_manufact(struct cd_softc *, union dvd_struct *);
int     dvd_read_struct(struct cd_softc *, union dvd_struct *);

#if defined(__macppc__)
int     cd_eject(void);
#endif /* __macppc__ */

const struct cfattach cd_ca = {
        sizeof(struct cd_softc), cdmatch, cdattach,
        cddetach, cdactivate
};

struct cfdriver cd_cd = {
        NULL, "cd", DV_DISK, CD_COCOVM
};

const struct scsi_inquiry_pattern cd_patterns[] = {
        {T_CDROM, T_REMOV,
         "",         "",                 ""},
        {T_CDROM, T_FIXED,
         "",         "",                 ""},
        {T_WORM, T_REMOV,
         "",         "",                 ""},
        {T_WORM, T_FIXED,
         "",         "",                 ""},
        {T_DIRECT, T_REMOV,
         "NEC                 CD-ROM DRIVE:260", "", ""},
#if 0
        {T_CDROM, T_REMOV, /* more luns */
         "PIONEER ", "CD-ROM DRM-600  ", ""},
#endif /* 0 */
};

#define cdlookup(unit) (struct cd_softc *)disk_lookup(&cd_cd, (unit))

int
cdmatch(struct device *parent, void *match, void *aux)
{
        struct scsi_attach_args         *sa = aux;
        struct scsi_inquiry_data        *inq = &sa->sa_sc_link->inqdata;
        int                              priority;

        scsi_inqmatch(inq, cd_patterns, nitems(cd_patterns),
            sizeof(cd_patterns[0]), &priority);

        return priority;
}

/*
 * The routine called by the low level scsi routine when it discovers
 * A device suitable for this driver
 */
void
cdattach(struct device *parent, struct device *self, void *aux)
{
        struct cd_softc                 *sc = (struct cd_softc *)self;
        struct scsi_attach_args         *sa = aux;
        struct scsi_link                *link = sa->sa_sc_link;

        SC_DEBUG(link, SDEV_DB2, ("cdattach:\n"));

        /*
         * Store information needed to contact our base driver
         */
        sc->sc_link = link;
        link->interpret_sense = cd_interpret_sense;
        link->device_softc = sc;
        if (link->openings > CDOUTSTANDING)
                link->openings = CDOUTSTANDING;

        /*
         * Initialize disk structures.
         */
        sc->sc_dk.dk_name = sc->sc_dev.dv_xname;
        bufq_init(&sc->sc_bufq, BUFQ_DEFAULT);

        printf("\n");

        scsi_xsh_set(&sc->sc_xsh, link, cdstart);

        /* Attach disk. */
        sc->sc_dk.dk_flags = DKF_NOLABELREAD;
        disk_attach(&sc->sc_dev, &sc->sc_dk);
}


int
cdactivate(struct device *self, int act)
{
        struct cd_softc *sc = (struct cd_softc *)self;

        switch (act) {
        case DVACT_RESUME:
                /*
                 * When resuming, hardware may have forgotten we locked it. So
                 * if there are any open partitions, lock the CD.
                 */
                if (sc->sc_dk.dk_openmask != 0)
                        scsi_prevent(sc->sc_link, PR_PREVENT,
                            SCSI_IGNORE_ILLEGAL_REQUEST |
                            SCSI_IGNORE_MEDIA_CHANGE |
                            SCSI_SILENT | SCSI_AUTOCONF);
                break;
        case DVACT_DEACTIVATE:
                SET(sc->sc_flags, CDF_DYING);
                scsi_xsh_del(&sc->sc_xsh);
                break;
        }
        return 0;
}

int
cddetach(struct device *self, int flags)
{
        struct cd_softc *sc = (struct cd_softc *)self;

        bufq_drain(&sc->sc_bufq);

        disk_gone(cdopen, self->dv_unit);

        /* Detach disk. */
        bufq_destroy(&sc->sc_bufq);
        disk_detach(&sc->sc_dk);

        return 0;
}

/*
 * Open the device. Make sure the partition info is as up-to-date as can be.
 */
int
cdopen(dev_t dev, int flag, int fmt, struct proc *p)
{
        struct scsi_link        *link;
        struct cd_softc         *sc;
        int                      error = 0, part, rawopen, unit;

        unit = DISKUNIT(dev);
        part = DISKPART(dev);

        rawopen = (part == RAW_PART) && (fmt == S_IFCHR);

        sc = cdlookup(unit);
        if (sc == NULL)
                return ENXIO;
        if (ISSET(sc->sc_flags, CDF_DYING)) {
                device_unref(&sc->sc_dev);
                return ENXIO;
        }

        link = sc->sc_link;
        SC_DEBUG(link, SDEV_DB1,
            ("cdopen: dev=0x%x (unit %d (of %d), partition %d)\n", dev, unit,
            cd_cd.cd_ndevs, part));

        if ((error = disk_lock(&sc->sc_dk)) != 0) {
                device_unref(&sc->sc_dev);
                return error;
        }

        if (sc->sc_dk.dk_openmask != 0) {
                /*
                 * If any partition is open, but the disk has been invalidated,
                 * disallow further opens.
                 */
                if (!ISSET(link->flags, SDEV_MEDIA_LOADED)) {
                        if (rawopen)
                                goto out;
                        error = EIO;
                        goto bad;
                }
        } else {
                /*
                 * Check that it is still responding and ok.  Drive can be in
                 * progress of loading media so use increased retries number
                 * and don't ignore NOT_READY.
                 */

                /* Use cd_interpret_sense() now. */
                SET(link->flags, SDEV_OPEN);

                error = scsi_test_unit_ready(link, TEST_READY_RETRIES,
                    (rawopen ? SCSI_SILENT : 0) | SCSI_IGNORE_ILLEGAL_REQUEST |
                    SCSI_IGNORE_MEDIA_CHANGE);

                /* Start the cd spinning if necessary. */
                if (error == EIO)
                        error = scsi_start(link, SSS_START,
                            SCSI_IGNORE_ILLEGAL_REQUEST |
                            SCSI_IGNORE_MEDIA_CHANGE | SCSI_SILENT);

                if (error) {
                        if (rawopen) {
                                error = 0;
                                goto out;
                        } else
                                goto bad;
                }

                /* Lock the cd in. */
                error = scsi_prevent(link, PR_PREVENT,
                    SCSI_IGNORE_ILLEGAL_REQUEST | SCSI_IGNORE_MEDIA_CHANGE |
                    SCSI_SILENT);
                if (error)
                        goto bad;

                /* Load the physical device parameters. */
                SET(link->flags, SDEV_MEDIA_LOADED);
                if (cd_get_parms(sc, (rawopen ? SCSI_SILENT : 0) |
                    SCSI_IGNORE_ILLEGAL_REQUEST | SCSI_IGNORE_MEDIA_CHANGE)) {
                        CLR(link->flags, SDEV_MEDIA_LOADED);
                        error = ENXIO;
                        goto bad;
                }
                SC_DEBUG(link, SDEV_DB3, ("Params loaded\n"));

                /* Fabricate a disk label. */
                cdgetdisklabel(dev, sc, sc->sc_dk.dk_label, 0);
                SC_DEBUG(link, SDEV_DB3, ("Disklabel fabricated\n"));
        }

out:
        if ((error = disk_openpart(&sc->sc_dk, part, fmt, 1)) != 0)
                goto bad;

        SET(link->flags, SDEV_OPEN);
        SC_DEBUG(link, SDEV_DB3, ("open complete\n"));

        /* It's OK to fall through because dk_openmask is now non-zero. */
bad:
        if (sc->sc_dk.dk_openmask == 0) {
                scsi_prevent(link, PR_ALLOW,
                    SCSI_IGNORE_ILLEGAL_REQUEST | SCSI_IGNORE_MEDIA_CHANGE |
                    SCSI_SILENT);
                CLR(link->flags, SDEV_OPEN | SDEV_MEDIA_LOADED);
        }

        disk_unlock(&sc->sc_dk);
        device_unref(&sc->sc_dev);
        return error;
}

/*
 * Close the device. Only called if we are the last occurrence of an open
 * device.
 */
int
cdclose(dev_t dev, int flag, int fmt, struct proc *p)
{
        struct cd_softc         *sc;
        int                      part = DISKPART(dev);

        sc = cdlookup(DISKUNIT(dev));
        if (sc == NULL)
                return ENXIO;
        if (ISSET(sc->sc_flags, CDF_DYING)) {
                device_unref(&sc->sc_dev);
                return ENXIO;
        }

        disk_lock_nointr(&sc->sc_dk);

        disk_closepart(&sc->sc_dk, part, fmt);

        if (sc->sc_dk.dk_openmask == 0) {
                /* XXXX Must wait for I/O to complete! */

                scsi_prevent(sc->sc_link, PR_ALLOW,
                    SCSI_IGNORE_ILLEGAL_REQUEST | SCSI_IGNORE_NOT_READY |
                    SCSI_SILENT);
                CLR(sc->sc_link->flags, SDEV_OPEN | SDEV_MEDIA_LOADED);

                if (ISSET(sc->sc_link->flags, SDEV_EJECTING)) {
                        scsi_start(sc->sc_link, SSS_STOP|SSS_LOEJ, 0);

                        CLR(sc->sc_link->flags, SDEV_EJECTING);
                }

                scsi_xsh_del(&sc->sc_xsh);
        }

        disk_unlock(&sc->sc_dk);

        device_unref(&sc->sc_dev);
        return 0;
}

/*
 * Actually translate the requested transfer into one the physical driver can
 * understand.  The transfer is described by a buf and will include only one
 * physical transfer.
 */
void
cdstrategy(struct buf *bp)
{
        struct cd_softc         *sc;
        int                      s;

        sc = cdlookup(DISKUNIT(bp->b_dev));
        if (sc == NULL) {
                bp->b_error = ENXIO;
                goto bad;
        }
        if (ISSET(sc->sc_flags, CDF_DYING)) {
                bp->b_error = ENXIO;
                goto bad;
        }

        SC_DEBUG(sc->sc_link, SDEV_DB2, ("cdstrategy: %ld bytes @ blk %lld\n",
            bp->b_bcount, (long long)bp->b_blkno));
        /*
         * If the device has been made invalid, error out
         * maybe the media changed, or no media loaded
         */
        if (!ISSET(sc->sc_link->flags, SDEV_MEDIA_LOADED)) {
                bp->b_error = EIO;
                goto bad;
        }

        /* Validate the request. */
        if (bounds_check_with_label(bp, sc->sc_dk.dk_label) == -1)
                goto done;

        /* Place it in the queue of disk activities for this disk. */
        bufq_queue(&sc->sc_bufq, bp);

        /*
         * Tell the device to get going on the transfer if it's
         * not doing anything, otherwise just wait for completion
         */
        scsi_xsh_add(&sc->sc_xsh);

        device_unref(&sc->sc_dev);
        return;

bad:
        SET(bp->b_flags, B_ERROR);
        bp->b_resid = bp->b_bcount;
done:
        s = splbio();
        biodone(bp);
        splx(s);
        if (sc != NULL)
                device_unref(&sc->sc_dev);
}

int
cd_cmd_rw6(struct scsi_generic *generic, int read, u_int64_t secno,
    u_int32_t nsecs)
{
        struct scsi_rw *cmd = (struct scsi_rw *)generic;

        cmd->opcode = read ? READ_COMMAND : WRITE_COMMAND;
        _lto3b(secno, cmd->addr);
        cmd->length = nsecs & 0xff;

        return sizeof(*cmd);
}

int
cd_cmd_rw10(struct scsi_generic *generic, int read, u_int64_t secno,
    u_int32_t nsecs)
{
        struct scsi_rw_10 *cmd = (struct scsi_rw_10 *)generic;

        cmd->opcode = read ? READ_10 : WRITE_10;
        _lto4b(secno, cmd->addr);
        _lto2b(nsecs, cmd->length);

        return sizeof(*cmd);
}

int
cd_cmd_rw12(struct scsi_generic *generic, int read, u_int64_t secno,
    u_int32_t nsecs)
{
        struct scsi_rw_12 *cmd = (struct scsi_rw_12 *)generic;

        cmd->opcode = read ? READ_12 : WRITE_12;
        _lto4b(secno, cmd->addr);
        _lto4b(nsecs, cmd->length);

        return sizeof(*cmd);
}

/*
 * cdstart looks to see if there is a buf waiting for the device
 * and that the device is not already busy. If both are true,
 * It dequeues the buf and creates a scsi command to perform the
 * transfer in the buf. The transfer request will call scsi_done
 * on completion, which will in turn call this routine again
 * so that the next queued transfer is performed.
 * The bufs are queued by the strategy routine (cdstrategy)
 *
 * This routine is also called after other non-queued requests
 * have been made of the scsi driver, to ensure that the queue
 * continues to be drained.
 *
 * must be called at the correct (highish) spl level
 * cdstart() is called at splbio from cdstrategy and scsi_done
 */
void
cdstart(struct scsi_xfer *xs)
{
        struct scsi_link        *link = xs->sc_link;
        struct cd_softc         *sc = link->device_softc;
        struct buf              *bp;
        struct partition        *p;
        u_int64_t                secno;
        u_int32_t                nsecs;
        int                      read;

        SC_DEBUG(link, SDEV_DB2, ("cdstart\n"));

        if (ISSET(sc->sc_flags, CDF_DYING)) {
                scsi_xs_put(xs);
                return;
        }

        if (!ISSET(link->flags, SDEV_MEDIA_LOADED)) {
                bufq_drain(&sc->sc_bufq);
                scsi_xs_put(xs);
                return;
        }

        bp = bufq_dequeue(&sc->sc_bufq);
        if (bp == NULL) {
                scsi_xs_put(xs);
                return;
        }
        read = ISSET(bp->b_flags, B_READ);

        SET(xs->flags, (read ? SCSI_DATA_IN : SCSI_DATA_OUT));
        xs->timeout = 30000;
        xs->data = bp->b_data;
        xs->datalen = bp->b_bcount;
        xs->done = cd_buf_done;
        xs->cookie = bp;
        xs->bp = bp;

        p = &sc->sc_dk.dk_label->d_partitions[DISKPART(bp->b_dev)];
        secno = DL_GETPOFFSET(p) + DL_BLKTOSEC(sc->sc_dk.dk_label, bp->b_blkno);
        nsecs = howmany(bp->b_bcount, sc->sc_dk.dk_label->d_secsize);

        if (!ISSET(link->flags, SDEV_ATAPI | SDEV_UMASS) &&
            (SID_ANSII_REV(&link->inqdata) < SCSI_REV_2) &&
            ((secno & 0x1fffff) == secno) &&
            ((nsecs & 0xff) == nsecs))
                xs->cmdlen = cd_cmd_rw6(&xs->cmd, read, secno, nsecs);
        else if (((secno & 0xffffffff) == secno) &&
            ((nsecs & 0xffff) == nsecs))
                xs->cmdlen = cd_cmd_rw10(&xs->cmd, read, secno, nsecs);
        else
                xs->cmdlen = cd_cmd_rw12(&xs->cmd, read, secno, nsecs);

        disk_busy(&sc->sc_dk);
        scsi_xs_exec(xs);

        /* Move onto the next io. */
        if (bufq_peek(&sc->sc_bufq))
                scsi_xsh_add(&sc->sc_xsh);
}

void
cd_buf_done(struct scsi_xfer *xs)
{
        struct cd_softc         *sc = xs->sc_link->device_softc;
        struct buf              *bp = xs->cookie;
        int                      error, s;

        switch (xs->error) {
        case XS_NOERROR:
                bp->b_error = 0;
                CLR(bp->b_flags, B_ERROR);
                bp->b_resid = xs->resid;
                break;

        case XS_SENSE:
        case XS_SHORTSENSE:
                SC_DEBUG_SENSE(xs);
                error = cd_interpret_sense(xs);
                if (error == 0) {
                        bp->b_error = 0;
                        CLR(bp->b_flags, B_ERROR);
                        bp->b_resid = xs->resid;
                        break;
                }
                if (error != ERESTART)
                        xs->retries = 0;
                goto retry;

        case XS_BUSY:
                if (xs->retries) {
                        if (scsi_delay(xs, 1) != ERESTART)
                                xs->retries = 0;
                }
                goto retry;

        case XS_TIMEOUT:
retry:
                if (xs->retries--) {
                        scsi_xs_exec(xs);
                        return;
                }
                /* FALLTHROUGH */

        default:
                bp->b_error = EIO;
                SET(bp->b_flags, B_ERROR);
                bp->b_resid = bp->b_bcount;
                break;
        }

        disk_unbusy(&sc->sc_dk, bp->b_bcount - xs->resid, bp->b_blkno,
            bp->b_flags & B_READ);

        s = splbio();
        biodone(bp);
        splx(s);
        scsi_xs_put(xs);
}

void
cdminphys(struct buf *bp)
{
        struct scsi_link        *link;
        struct cd_softc         *sc;
        long                     max;

        sc = cdlookup(DISKUNIT(bp->b_dev));
        if (sc == NULL)
                return;
        link = sc->sc_link;

        /*
         * If the device is ancient, we want to make sure that
         * the transfer fits into a 6-byte cdb.
         *
         * XXX Note that the SCSI-I spec says that 256-block transfers
         * are allowed in a 6-byte read/write, and are specified
         * by setting the "length" to 0.  However, we're conservative
         * here, allowing only 255-block transfers in case an
         * ancient device gets confused by length == 0.  A length of 0
         * in a 10-byte read/write actually means 0 blocks.
         */
        if (!ISSET(link->flags, SDEV_ATAPI | SDEV_UMASS) &&
            SID_ANSII_REV(&link->inqdata) < SCSI_REV_2) {
                max = sc->sc_dk.dk_label->d_secsize * 0xff;

                if (bp->b_bcount > max)
                        bp->b_bcount = max;
        }

        if (link->bus->sb_adapter->dev_minphys != NULL)
                (*link->bus->sb_adapter->dev_minphys)(bp, link);
        else
                minphys(bp);

        device_unref(&sc->sc_dev);
}

int
cdread(dev_t dev, struct uio *uio, int ioflag)
{
        return physio(cdstrategy, dev, B_READ, cdminphys, uio);
}

int
cdwrite(dev_t dev, struct uio *uio, int ioflag)
{
        return physio(cdstrategy, dev, B_WRITE, cdminphys, uio);
}

/*
 * Perform special action on behalf of the user.
 * Knows about the internals of this device
 */
int
cdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p)
{
        struct cd_softc         *sc;
        struct disklabel        *lp;
        int                      part = DISKPART(dev);
        int                      error = 0;

        sc = cdlookup(DISKUNIT(dev));
        if (sc == NULL)
                return ENXIO;
        if (ISSET(sc->sc_flags, CDF_DYING)) {
                device_unref(&sc->sc_dev);
                return ENXIO;
        }

        SC_DEBUG(sc->sc_link, SDEV_DB2, ("cdioctl 0x%lx\n", cmd));

        /*
         * If the device is not valid.. abandon ship
         */
        if (!ISSET(sc->sc_link->flags, SDEV_MEDIA_LOADED)) {
                switch (cmd) {
                case DIOCLOCK:
                case DIOCEJECT:
                case SCIOCIDENTIFY:
                case SCIOCCOMMAND:
                case SCIOCDEBUG:
                case CDIOCLOADUNLOAD:
                case SCIOCRESET:
                case CDIOCGETVOL:
                case CDIOCSETVOL:
                case CDIOCSETMONO:
                case CDIOCSETSTEREO:
                case CDIOCSETMUTE:
                case CDIOCSETLEFT:
                case CDIOCSETRIGHT:
                case CDIOCCLOSE:
                case CDIOCEJECT:
                case CDIOCALLOW:
                case CDIOCPREVENT:
                case CDIOCSETDEBUG:
                case CDIOCCLRDEBUG:
                case CDIOCRESET:
                case DVD_AUTH:
                case DVD_READ_STRUCT:
                case MTIOCTOP:
                        if (part == RAW_PART)
                                break;
                /* FALLTHROUGH */
                default:
                        if (!ISSET(sc->sc_link->flags, SDEV_OPEN))
                                error = ENODEV;
                        else
                                error = EIO;
                        goto exit;
                }
        }

        switch (cmd) {
        case DIOCRLDINFO:
                lp = malloc(sizeof(*lp), M_TEMP, M_WAITOK);
                cdgetdisklabel(dev, sc, lp, 0);
                memcpy(sc->sc_dk.dk_label, lp, sizeof(*lp));
                free(lp, M_TEMP, sizeof(*lp));
                break;

        case DIOCGPDINFO:
                cdgetdisklabel(dev, sc, (struct disklabel *)addr, 1);
                break;

        case DIOCGDINFO:
                *(struct disklabel *)addr = *(sc->sc_dk.dk_label);
                break;

        case DIOCGPART:
                ((struct partinfo *)addr)->disklab = sc->sc_dk.dk_label;
                ((struct partinfo *)addr)->part =
                    &sc->sc_dk.dk_label->d_partitions[DISKPART(dev)];
                break;

        case DIOCWDINFO:
        case DIOCSDINFO:
                if (!ISSET(flag, FWRITE)) {
                        error = EBADF;
                        break;
                }

                if ((error = disk_lock(&sc->sc_dk)) != 0)
                        break;

                error = setdisklabel(sc->sc_dk.dk_label,
                    (struct disklabel *)addr, sc->sc_dk.dk_openmask);
                if (error == 0) {
                }

                disk_unlock(&sc->sc_dk);
                break;

        case CDIOCPLAYTRACKS: {
                struct ioc_play_track *args = (struct ioc_play_track *)addr;

                if ((error = cd_set_pa_immed(sc, 0)) != 0)
                        break;
                error = cd_play_tracks(sc, args->start_track,
                    args->start_index, args->end_track, args->end_index);
                break;
        }
        case CDIOCPLAYMSF: {
                struct ioc_play_msf *args = (struct ioc_play_msf *)addr;

                if ((error = cd_set_pa_immed(sc, 0)) != 0)
                        break;
                error = cd_play_msf(sc, args->start_m, args->start_s,
                    args->start_f, args->end_m, args->end_s, args->end_f);
                break;
        }
        case CDIOCPLAYBLOCKS: {
                struct ioc_play_blocks *args = (struct ioc_play_blocks *)addr;

                if ((error = cd_set_pa_immed(sc, 0)) != 0)
                        break;
                error = cd_play(sc, args->blk, args->len);
                break;
        }
        case CDIOCREADSUBCHANNEL: {
                struct ioc_read_subchannel *args =
                    (struct ioc_read_subchannel *)addr;
                struct cd_sub_channel_info *data;
                int len = args->data_len;

                if (len > sizeof(*data) ||
                    len < sizeof(struct cd_sub_channel_header)) {
                        error = EINVAL;
                        break;
                }
                data = dma_alloc(sizeof(*data), PR_WAITOK);
                error = cd_read_subchannel(sc, args->address_format,
                    args->data_format, args->track, data, len);
                if (error) {
                        dma_free(data, sizeof(*data));
                        break;
                }
                len = min(len, _2btol(data->header.data_len) +
                    sizeof(struct cd_sub_channel_header));
                error = copyout(data, args->data, len);
                dma_free(data, sizeof(*data));
                break;
        }
        case CDIOREADTOCHEADER: {
                struct ioc_toc_header *th;

                th = dma_alloc(sizeof(*th), PR_WAITOK);
                if ((error = cd_read_toc(sc, 0, 0, th, sizeof(*th), 0)) != 0) {
                        dma_free(th, sizeof(*th));
                        break;
                }
                if (ISSET(sc->sc_link->quirks, ADEV_LITTLETOC))
                        th->len = letoh16(th->len);
                else
                        th->len = betoh16(th->len);
                if (th->len > 0)
                        memcpy(addr, th, sizeof(*th));
                else
                        error = EIO;
                dma_free(th, sizeof(*th));
                break;
        }
        case CDIOREADTOCENTRYS: {
                struct cd_toc *toc;
                struct ioc_read_toc_entry *te =
                    (struct ioc_read_toc_entry *)addr;
                struct ioc_toc_header *th;
                struct cd_toc_entry *cte;
                int len = te->data_len;
                int ntracks;

                toc = dma_alloc(sizeof(*toc), PR_WAITOK | PR_ZERO);

                th = &toc->header;

                if (len > sizeof(toc->entries) ||
                    len < sizeof(struct cd_toc_entry)) {
                        dma_free(toc, sizeof(*toc));
                        error = EINVAL;
                        break;
                }
                error = cd_read_toc(sc, te->address_format, te->starting_track,
                    toc, len + sizeof(struct ioc_toc_header), 0);
                if (error) {
                        dma_free(toc, sizeof(*toc));
                        break;
                }
                if (te->address_format == CD_LBA_FORMAT)
                        for (ntracks =
                            th->ending_track - th->starting_track + 1;
                            ntracks >= 0; ntracks--) {
                                cte = &toc->entries[ntracks];
                                cte->addr_type = CD_LBA_FORMAT;
                                if (ISSET(sc->sc_link->quirks,
                                    ADEV_LITTLETOC)) {
#if BYTE_ORDER == BIG_ENDIAN
                                        swap16_multi((u_int16_t *)&cte->addr,
                                            sizeof(cte->addr) / 2);
#endif /* BYTE_ORDER == BIG_ENDIAN */
                                } else
                                        cte->addr.lba = betoh32(cte->addr.lba);
                        }
                if (ISSET(sc->sc_link->quirks, ADEV_LITTLETOC)) {
                        th->len = letoh16(th->len);
                } else
                        th->len = betoh16(th->len);
                len = min(len, th->len - (sizeof(th->starting_track) +
                    sizeof(th->ending_track)));

                error = copyout(toc->entries, te->data, len);
                dma_free(toc, sizeof(*toc));
                break;
        }
        case CDIOREADMSADDR: {
                struct cd_toc *toc;
                int sessno = *(int *)addr;
                struct cd_toc_entry *cte;

                if (sessno != 0) {
                        error = EINVAL;
                        break;
                }

                toc = dma_alloc(sizeof(*toc), PR_WAITOK | PR_ZERO);

                error = cd_read_toc(sc, 0, 0, toc,
                    sizeof(struct ioc_toc_header) + sizeof(struct cd_toc_entry),
                    0x40 /* control word for "get MS info" */);

                if (error) {
                        dma_free(toc, sizeof(*toc));
                        break;
                }

                cte = &toc->entries[0];
                if (ISSET(sc->sc_link->quirks, ADEV_LITTLETOC)) {
#if BYTE_ORDER == BIG_ENDIAN
                        swap16_multi((u_int16_t *)&cte->addr,
                            sizeof(cte->addr) / 2);
#endif /* BYTE_ORDER == BIG_ENDIAN */
                } else
                        cte->addr.lba = betoh32(cte->addr.lba);
                if (ISSET(sc->sc_link->quirks, ADEV_LITTLETOC))
                        toc->header.len = letoh16(toc->header.len);
                else
                        toc->header.len = betoh16(toc->header.len);

                *(int *)addr = (toc->header.len >= 10 && cte->track > 1) ?
                        cte->addr.lba : 0;
                dma_free(toc, sizeof(*toc));
                break;
        }
        case CDIOCSETPATCH: {
                struct ioc_patch *arg = (struct ioc_patch *)addr;

                error = cd_setchan(sc, arg->patch[0], arg->patch[1],
                    arg->patch[2], arg->patch[3], 0);
                break;
        }
        case CDIOCGETVOL: {
                struct ioc_vol *arg = (struct ioc_vol *)addr;

                error = cd_getvol(sc, arg, 0);
                break;
        }
        case CDIOCSETVOL: {
                struct ioc_vol *arg = (struct ioc_vol *)addr;

                error = cd_setvol(sc, arg, 0);
                break;
        }

        case CDIOCSETMONO:
                error = cd_setchan(sc, BOTH_CHANNEL, BOTH_CHANNEL, MUTE_CHANNEL,
                    MUTE_CHANNEL, 0);
                break;

        case CDIOCSETSTEREO:
                error = cd_setchan(sc, LEFT_CHANNEL, RIGHT_CHANNEL,
                    MUTE_CHANNEL, MUTE_CHANNEL, 0);
                break;

        case CDIOCSETMUTE:
                error = cd_setchan(sc, MUTE_CHANNEL, MUTE_CHANNEL, MUTE_CHANNEL,
                    MUTE_CHANNEL, 0);
                break;

        case CDIOCSETLEFT:
                error = cd_setchan(sc, LEFT_CHANNEL, LEFT_CHANNEL, MUTE_CHANNEL,
                    MUTE_CHANNEL, 0);
                break;

        case CDIOCSETRIGHT:
                error = cd_setchan(sc, RIGHT_CHANNEL, RIGHT_CHANNEL,
                    MUTE_CHANNEL, MUTE_CHANNEL, 0);
                break;

        case CDIOCRESUME:
                error = cd_pause(sc, 1);
                break;

        case CDIOCPAUSE:
                error = cd_pause(sc, 0);
                break;
        case CDIOCSTART:
                error = scsi_start(sc->sc_link, SSS_START, 0);
                break;

        case CDIOCSTOP:
                error = scsi_start(sc->sc_link, SSS_STOP, 0);
                break;

close_tray:
        case CDIOCCLOSE:
                error = scsi_start(sc->sc_link, SSS_START|SSS_LOEJ,
                    SCSI_IGNORE_NOT_READY | SCSI_IGNORE_MEDIA_CHANGE);
                break;

        case MTIOCTOP:
                if (((struct mtop *)addr)->mt_op == MTRETEN)
                        goto close_tray;
                if (((struct mtop *)addr)->mt_op != MTOFFL) {
                        error = EIO;
                        break;
                }
                /* FALLTHROUGH */
        case CDIOCEJECT: /* FALLTHROUGH */
        case DIOCEJECT:
                SET(sc->sc_link->flags, SDEV_EJECTING);
                break;
        case CDIOCALLOW:
                error = scsi_prevent(sc->sc_link, PR_ALLOW, 0);
                break;
        case CDIOCPREVENT:
                error = scsi_prevent(sc->sc_link, PR_PREVENT, 0);
                break;
        case DIOCLOCK:
                error = scsi_prevent(sc->sc_link,
                    (*(int *)addr) ? PR_PREVENT : PR_ALLOW, 0);
                break;
        case CDIOCSETDEBUG:
                SET(sc->sc_link->flags, SDEV_DB1 | SDEV_DB2);
                break;
        case CDIOCCLRDEBUG:
                CLR(sc->sc_link->flags, SDEV_DB1 | SDEV_DB2);
                break;
        case CDIOCRESET:
        case SCIOCRESET:
                error = cd_reset(sc);
                break;
        case CDIOCLOADUNLOAD: {
                struct ioc_load_unload *args = (struct ioc_load_unload *)addr;

                error = cd_load_unload(sc, args->options, args->slot);
                break;
        }

        case DVD_AUTH:
                error = dvd_auth(sc, (union dvd_authinfo *)addr);
                break;
        case DVD_READ_STRUCT:
                error = dvd_read_struct(sc, (union dvd_struct *)addr);
                break;
        default:
                if (DISKPART(dev) != RAW_PART) {
                        error = ENOTTY;
                        break;
                }
                error = scsi_do_ioctl(sc->sc_link, cmd, addr, flag);
                break;
        }

exit:

        device_unref(&sc->sc_dev);
        return error;
}

/*
 * Load the label information on the named device
 * Actually fabricate a disklabel
 *
 * EVENTUALLY take information about different
 * data tracks from the TOC and put it in the disklabel
 */
int
cdgetdisklabel(dev_t dev, struct cd_softc *sc, struct disklabel *lp,
    int spoofonly)
{
        struct cd_toc           *toc;
        int                      tocidx, n, audioonly = 1;

        bzero(lp, sizeof(struct disklabel));

        lp->d_secsize = sc->params.secsize;
        lp->d_ntracks = 1;
        lp->d_nsectors = 100;
        lp->d_secpercyl = 100;
        lp->d_ncylinders = (sc->params.disksize / 100) + 1;

        if (ISSET(sc->sc_link->flags, SDEV_ATAPI)) {
                strncpy(lp->d_typename, "ATAPI CD-ROM", sizeof(lp->d_typename));
                lp->d_type = DTYPE_ATAPI;
        } else {
                strncpy(lp->d_typename, "SCSI CD-ROM", sizeof(lp->d_typename));
                lp->d_type = DTYPE_SCSI;
        }

        strncpy(lp->d_packname, "fictitious", sizeof(lp->d_packname));
        DL_SETDSIZE(lp, sc->params.disksize);
        lp->d_version = 1;

        lp->d_magic = DISKMAGIC;
        lp->d_magic2 = DISKMAGIC;
        lp->d_checksum = dkcksum(lp);

        toc = dma_alloc(sizeof(*toc), PR_WAITOK | PR_ZERO);
        if (cd_load_toc(sc, toc, CD_LBA_FORMAT)) {
                audioonly = 0; /* No valid TOC found == not an audio CD. */
                goto done;
        }

        n = toc->header.ending_track - toc->header.starting_track + 1;
        for (tocidx = 0; tocidx < n; tocidx++)
                if (toc->entries[tocidx].control & 4) {
                        audioonly = 0; /* Found a non-audio track. */
                        goto done;
                }

done:
        dma_free(toc, sizeof(*toc));

        if (audioonly)
                return 0;
        return readdisklabel(DISKLABELDEV(dev), cdstrategy, lp, spoofonly);
}

int
cd_setchan(struct cd_softc *sc, int p0, int p1, int p2, int p3, int flags)
{
        union scsi_mode_sense_buf       *data;
        struct cd_audio_page            *audio = NULL;
        int                              error, big;

        data = dma_alloc(sizeof(*data), PR_NOWAIT);
        if (data == NULL)
                return ENOMEM;

        error = scsi_do_mode_sense(sc->sc_link, AUDIO_PAGE, data,
            (void **)&audio, sizeof(*audio), flags, &big);
        if (error == 0 && audio == NULL)
                error = EIO;

        if (error == 0) {
                audio->port[LEFT_PORT].channels = p0;
                audio->port[RIGHT_PORT].channels = p1;
                audio->port[2].channels = p2;
                audio->port[3].channels = p3;
                if (big)
                        error = scsi_mode_select_big(sc->sc_link, SMS_PF,
                            &data->hdr_big, flags, 20000);
                else
                        error = scsi_mode_select(sc->sc_link, SMS_PF,
                            &data->hdr, flags, 20000);
        }

        dma_free(data, sizeof(*data));
        return error;
}

int
cd_getvol(struct cd_softc *sc, struct ioc_vol *arg, int flags)
{
        union scsi_mode_sense_buf       *data;
        struct cd_audio_page            *audio = NULL;
        int                              big, error;

        data = dma_alloc(sizeof(*data), PR_NOWAIT);
        if (data == NULL)
                return ENOMEM;

        error = scsi_do_mode_sense(sc->sc_link, AUDIO_PAGE, data,
            (void **)&audio, sizeof(*audio), flags, &big);
        if (error == 0 && audio == NULL)
                error = EIO;

        if (error == 0) {
                arg->vol[0] = audio->port[0].volume;
                arg->vol[1] = audio->port[1].volume;
                arg->vol[2] = audio->port[2].volume;
                arg->vol[3] = audio->port[3].volume;
        }

        dma_free(data, sizeof(*data));
        return 0;
}

int
cd_setvol(struct cd_softc *sc, const struct ioc_vol *arg, int flags)
{
        union scsi_mode_sense_buf       *data;
        struct cd_audio_page            *audio = NULL;
        u_int8_t                         mask_volume[4];
        int                              error, big;

        data = dma_alloc(sizeof(*data), PR_NOWAIT);
        if (data == NULL)
                return ENOMEM;

        error = scsi_do_mode_sense(sc->sc_link,
            AUDIO_PAGE | SMS_PAGE_CTRL_CHANGEABLE, data, (void **)&audio,
            sizeof(*audio), flags, &big);
        if (error == 0 && audio == NULL)
                error = EIO;
        if (error != 0) {
                dma_free(data, sizeof(*data));
                return error;
        }

        mask_volume[0] = audio->port[0].volume;
        mask_volume[1] = audio->port[1].volume;
        mask_volume[2] = audio->port[2].volume;
        mask_volume[3] = audio->port[3].volume;

        error = scsi_do_mode_sense(sc->sc_link, AUDIO_PAGE, data,
            (void **)&audio, sizeof(*audio), flags, &big);
        if (error == 0 && audio == NULL)
                error = EIO;
        if (error != 0) {
                dma_free(data, sizeof(*data));
                return error;
        }

        audio->port[0].volume = arg->vol[0] & mask_volume[0];
        audio->port[1].volume = arg->vol[1] & mask_volume[1];
        audio->port[2].volume = arg->vol[2] & mask_volume[2];
        audio->port[3].volume = arg->vol[3] & mask_volume[3];

        if (big)
                error = scsi_mode_select_big(sc->sc_link, SMS_PF,
                    &data->hdr_big, flags, 20000);
        else
                error = scsi_mode_select(sc->sc_link, SMS_PF,
                    &data->hdr, flags, 20000);

        dma_free(data, sizeof(*data));
        return error;
}

int
cd_load_unload(struct cd_softc *sc, int options, int slot)
{
        struct scsi_load_unload         *cmd;
        struct scsi_xfer                *xs;
        int                              error;

        xs = scsi_xs_get(sc->sc_link, 0);
        if (xs == NULL)
                return ENOMEM;
        xs->cmdlen = sizeof(*cmd);
        xs->timeout = 200000;

        cmd = (struct scsi_load_unload *)&xs->cmd;
        cmd->opcode = LOAD_UNLOAD;
        cmd->options = options;    /* ioctl uses ATAPI values */
        cmd->slot = slot;

        error = scsi_xs_sync(xs);
        scsi_xs_put(xs);

        return error;
}

int
cd_set_pa_immed(struct cd_softc *sc, int flags)
{
        union scsi_mode_sense_buf       *data;
        struct cd_audio_page            *audio = NULL;
        int                              error, oflags, big;

        if (ISSET(sc->sc_link->flags, SDEV_ATAPI))
                /* XXX Noop? */
                return 0;

        data = dma_alloc(sizeof(*data), PR_NOWAIT);
        if (data == NULL)
                return ENOMEM;

        error = scsi_do_mode_sense(sc->sc_link, AUDIO_PAGE, data,
            (void **)&audio, sizeof(*audio), flags, &big);
        if (error == 0 && audio == NULL)
                error = EIO;

        if (error == 0) {
                oflags = audio->flags;
                CLR(audio->flags, CD_PA_SOTC);
                SET(audio->flags, CD_PA_IMMED);
                if (audio->flags != oflags) {
                        if (big)
                                error = scsi_mode_select_big(sc->sc_link,
                                    SMS_PF, &data->hdr_big, flags, 20000);
                        else
                                error = scsi_mode_select(sc->sc_link, SMS_PF,
                                    &data->hdr, flags, 20000);
                }
        }

        dma_free(data, sizeof(*data));
        return error;
}

/*
 * Get scsi driver to send a "start playing" command
 */
int
cd_play(struct cd_softc *sc, int secno, int nsecs)
{
        struct scsi_play        *cmd;
        struct scsi_xfer        *xs;
        int                      error;

        xs = scsi_xs_get(sc->sc_link, 0);
        if (xs == NULL)
                return ENOMEM;
        xs->cmdlen = sizeof(*cmd);
        xs->timeout = 200000;

        cmd = (struct scsi_play *)&xs->cmd;
        cmd->opcode = PLAY;
        _lto4b(secno, cmd->blk_addr);
        _lto2b(nsecs, cmd->xfer_len);

        error = scsi_xs_sync(xs);
        scsi_xs_put(xs);

        return error;
}

/*
 * Get scsi driver to send a "start playing" command
 */
int
cd_play_tracks(struct cd_softc *sc, int strack, int sindex, int etrack,
    int eindex)
{
        struct cd_toc           *toc;
        int                      error;
        u_char                   endf, ends, endm;

        if (!etrack)
                return EIO;
        if (strack > etrack)
                return EINVAL;

        toc = dma_alloc(sizeof(*toc), PR_WAITOK | PR_ZERO);

        if ((error = cd_load_toc(sc, toc, CD_MSF_FORMAT)) != 0)
                goto done;

        if (++etrack > (toc->header.ending_track+1))
                etrack = toc->header.ending_track+1;

        strack -= toc->header.starting_track;
        etrack -= toc->header.starting_track;
        if (strack < 0) {
                error = EINVAL;
                goto done;
        }

        /*
         * The track ends one frame before the next begins.  The last track
         * is taken care of by the leadoff track.
         */
        endm = toc->entries[etrack].addr.msf.minute;
        ends = toc->entries[etrack].addr.msf.second;
        endf = toc->entries[etrack].addr.msf.frame;
        if (endf-- == 0) {
                endf = CD_FRAMES - 1;
                if (ends-- == 0) {
                        ends = CD_SECS - 1;
                        if (endm-- == 0) {
                                error = EINVAL;
                                goto done;
                        }
                }
        }

        error = cd_play_msf(sc, toc->entries[strack].addr.msf.minute,
            toc->entries[strack].addr.msf.second,
            toc->entries[strack].addr.msf.frame,
            endm, ends, endf);

done:
        dma_free(toc, sizeof(*toc));
        return error;
}

/*
 * Get scsi driver to send a "play msf" command
 */
int
cd_play_msf(struct cd_softc *sc, int startm, int starts, int startf, int endm,
    int ends, int endf)
{
        struct scsi_play_msf            *cmd;
        struct scsi_xfer                *xs;
        int                              error;

        xs = scsi_xs_get(sc->sc_link, 0);
        if (xs == NULL)
                return ENOMEM;
        xs->cmdlen = sizeof(*cmd);
        xs->timeout = 20000;

        cmd = (struct scsi_play_msf *)&xs->cmd;
        cmd->opcode = PLAY_MSF;
        cmd->start_m = startm;
        cmd->start_s = starts;
        cmd->start_f = startf;
        cmd->end_m = endm;
        cmd->end_s = ends;
        cmd->end_f = endf;

        error = scsi_xs_sync(xs);
        scsi_xs_put(xs);

        return error;
}

/*
 * Get scsi driver to send a "start up" command
 */
int
cd_pause(struct cd_softc *sc, int go)
{
        struct scsi_pause               *cmd;
        struct scsi_xfer                *xs;
        int                              error;

        xs = scsi_xs_get(sc->sc_link, 0);
        if (xs == NULL)
                return ENOMEM;
        xs->cmdlen = sizeof(*cmd);
        xs->timeout = 2000;

        cmd = (struct scsi_pause *)&xs->cmd;
        cmd->opcode = PAUSE;
        cmd->resume = go;

        error = scsi_xs_sync(xs);
        scsi_xs_put(xs);

        return error;
}

/*
 * Get scsi driver to send a "RESET" command
 */
int
cd_reset(struct cd_softc *sc)
{
        struct scsi_xfer                *xs;
        int                              error;

        xs = scsi_xs_get(sc->sc_link, SCSI_RESET);
        if (xs == NULL)
                return ENOMEM;

        xs->timeout = 2000;

        error = scsi_xs_sync(xs);
        scsi_xs_put(xs);

        return error;
}

/*
 * Read subchannel
 */
int
cd_read_subchannel(struct cd_softc *sc, int mode, int format, int track,
    struct cd_sub_channel_info *data, int len)
{
        struct scsi_read_subchannel     *cmd;
        struct scsi_xfer                *xs;
        int                              error;

        xs = scsi_xs_get(sc->sc_link, SCSI_DATA_IN | SCSI_SILENT);
        if (xs == NULL)
                return ENOMEM;
        xs->cmdlen = sizeof(*cmd);
        xs->data = (void *)data;
        xs->datalen = len;
        xs->timeout = 5000;

        cmd = (struct scsi_read_subchannel *)&xs->cmd;
        cmd->opcode = READ_SUBCHANNEL;
        if (mode == CD_MSF_FORMAT)
                SET(cmd->byte2, CD_MSF);
        cmd->byte3 = SRS_SUBQ;
        cmd->subchan_format = format;
        cmd->track = track;
        _lto2b(len, cmd->data_len);

        error = scsi_xs_sync(xs);
        scsi_xs_put(xs);

        return error;
}

/*
 * Read table of contents
 */
int
cd_read_toc(struct cd_softc *sc, int mode, int start, void *data, int len,
    int control)
{
        struct scsi_read_toc            *cmd;
        struct scsi_xfer                *xs;
        int                              error;

        xs = scsi_xs_get(sc->sc_link, SCSI_DATA_IN |
            SCSI_IGNORE_ILLEGAL_REQUEST);
        if (xs == NULL)
                return ENOMEM;
        xs->cmdlen = sizeof(*cmd);
        xs->data = data;
        xs->datalen = len;
        xs->timeout = 5000;

        bzero(data, len);

        cmd = (struct scsi_read_toc *)&xs->cmd;
        cmd->opcode = READ_TOC;

        if (mode == CD_MSF_FORMAT)
                SET(cmd->byte2, CD_MSF);
        cmd->from_track = start;
        _lto2b(len, cmd->data_len);
        cmd->control = control;

        error = scsi_xs_sync(xs);
        scsi_xs_put(xs);

        return error;
}

int
cd_load_toc(struct cd_softc *sc, struct cd_toc *toc, int fmt)
{
        int     n, len, error;

        error = cd_read_toc(sc, 0, 0, toc, sizeof(toc->header), 0);

        if (error == 0) {
                if (toc->header.ending_track < toc->header.starting_track)
                        return EIO;
                /* +2 to account for leading out track. */
                n = toc->header.ending_track - toc->header.starting_track + 2;
                len = n * sizeof(struct cd_toc_entry) + sizeof(toc->header);
                error = cd_read_toc(sc, fmt, 0, toc, len, 0);
        }

        return error;
}


/*
 * Get the scsi driver to send a full inquiry to the device and use the
 * results to fill out the disk parameter structure.
 */
int
cd_get_parms(struct cd_softc *sc, int flags)
{
        /* Reasonable defaults for drives that don't support READ_CAPACITY */
        sc->params.secsize = 2048;
        sc->params.disksize = 400000;

        if (ISSET(sc->sc_link->quirks, ADEV_NOCAPACITY))
                return 0;

        sc->params.disksize = cd_size(sc->sc_link, flags, &sc->params.secsize);

        if ((sc->params.secsize < 512) ||
            ((sc->params.secsize & 511) != 0))
                sc->params.secsize = 2048;      /* some drives lie ! */

        if (sc->params.disksize < 100)
                sc->params.disksize = 400000;

        return 0;
}

daddr_t
cdsize(dev_t dev)
{
        /* CD-ROMs are read-only. */
        return -1;
}

int
cddump(dev_t dev, daddr_t blkno, caddr_t va, size_t size)
{
        /* Not implemented. */
        return ENXIO;
}

#define dvd_copy_key(dst, src)          memcpy((dst), (src), DVD_KEY_SIZE)
#define dvd_copy_challenge(dst, src)    memcpy((dst), (src), DVD_CHALLENGE_SIZE)

#define DVD_AUTH_BUFSIZE                20

int
dvd_auth(struct cd_softc *sc, union dvd_authinfo *a)
{
        struct scsi_generic     *cmd;
        struct scsi_xfer        *xs;
        u_int8_t                *buf;
        int                      error;

        buf = dma_alloc(DVD_AUTH_BUFSIZE, PR_WAITOK | PR_ZERO);
        if (buf == NULL)
                return ENOMEM;

        xs = scsi_xs_get(sc->sc_link, 0);
        if (xs == NULL) {
                error = ENOMEM;
                goto done;
        }
        xs->cmdlen = sizeof(*cmd);
        xs->timeout = 30000;
        xs->data = buf;

        cmd = &xs->cmd;

        switch (a->type) {
        case DVD_LU_SEND_AGID:
                cmd->opcode = GPCMD_REPORT_KEY;
                cmd->bytes[8] = 8;
                cmd->bytes[9] = 0 | (0 << 6);
                xs->datalen = 8;
                SET(xs->flags, SCSI_DATA_IN);

                error = scsi_xs_sync(xs);
                scsi_xs_put(xs);

                if (error == 0)
                        a->lsa.agid = buf[7] >> 6;
                break;

        case DVD_LU_SEND_CHALLENGE:
                cmd->opcode = GPCMD_REPORT_KEY;
                cmd->bytes[8] = 16;
                cmd->bytes[9] = 1 | (a->lsc.agid << 6);
                xs->datalen = 16;
                SET(xs->flags, SCSI_DATA_IN);

                error = scsi_xs_sync(xs);
                scsi_xs_put(xs);
                if (error == 0)
                        dvd_copy_challenge(a->lsc.chal, &buf[4]);
                break;

        case DVD_LU_SEND_KEY1:
                cmd->opcode = GPCMD_REPORT_KEY;
                cmd->bytes[8] = 12;
                cmd->bytes[9] = 2 | (a->lsk.agid << 6);
                xs->datalen = 12;
                SET(xs->flags, SCSI_DATA_IN);

                error = scsi_xs_sync(xs);
                scsi_xs_put(xs);

                if (error == 0)
                        dvd_copy_key(a->lsk.key, &buf[4]);
                break;

        case DVD_LU_SEND_TITLE_KEY:
                cmd->opcode = GPCMD_REPORT_KEY;
                _lto4b(a->lstk.lba, &cmd->bytes[1]);
                cmd->bytes[8] = 12;
                cmd->bytes[9] = 4 | (a->lstk.agid << 6);
                xs->datalen = 12;
                SET(xs->flags, SCSI_DATA_IN);

                error = scsi_xs_sync(xs);
                scsi_xs_put(xs);

                if (error == 0) {
                        a->lstk.cpm = (buf[4] >> 7) & 1;
                        a->lstk.cp_sec = (buf[4] >> 6) & 1;
                        a->lstk.cgms = (buf[4] >> 4) & 3;
                        dvd_copy_key(a->lstk.title_key, &buf[5]);
                }
                break;

        case DVD_LU_SEND_ASF:
                cmd->opcode = GPCMD_REPORT_KEY;
                cmd->bytes[8] = 8;
                cmd->bytes[9] = 5 | (a->lsasf.agid << 6);
                xs->datalen = 8;
                SET(xs->flags, SCSI_DATA_IN);

                error = scsi_xs_sync(xs);
                scsi_xs_put(xs);

                if (error == 0)
                        a->lsasf.asf = buf[7] & 1;
                break;

        case DVD_HOST_SEND_CHALLENGE:
                cmd->opcode = GPCMD_SEND_KEY;
                cmd->bytes[8] = 16;
                cmd->bytes[9] = 1 | (a->hsc.agid << 6);
                buf[1] = 14;
                dvd_copy_challenge(&buf[4], a->hsc.chal);
                xs->datalen = 16;
                SET(xs->flags, SCSI_DATA_OUT);

                error = scsi_xs_sync(xs);
                scsi_xs_put(xs);

                if (error == 0)
                        a->type = DVD_LU_SEND_KEY1;
                break;

        case DVD_HOST_SEND_KEY2:
                cmd->opcode = GPCMD_SEND_KEY;
                cmd->bytes[8] = 12;
                cmd->bytes[9] = 3 | (a->hsk.agid << 6);
                buf[1] = 10;
                dvd_copy_key(&buf[4], a->hsk.key);
                xs->datalen = 12;
                SET(xs->flags, SCSI_DATA_OUT);

                error = scsi_xs_sync(xs);
                scsi_xs_put(xs);

                if (error == 0)
                        a->type = DVD_AUTH_ESTABLISHED;
                else
                        a->type = DVD_AUTH_FAILURE;
                break;

        case DVD_INVALIDATE_AGID:
                cmd->opcode = GPCMD_REPORT_KEY;
                cmd->bytes[9] = 0x3f | (a->lsa.agid << 6);
                xs->data = NULL;

                error = scsi_xs_sync(xs);
                scsi_xs_put(xs);
                break;

        case DVD_LU_SEND_RPC_STATE:
                cmd->opcode = GPCMD_REPORT_KEY;
                cmd->bytes[8] = 8;
                cmd->bytes[9] = 8 | (0 << 6);
                xs->datalen = 8;
                SET(xs->flags, SCSI_DATA_IN);

                error = scsi_xs_sync(xs);
                scsi_xs_put(xs);

                if (error == 0) {
                        a->lrpcs.type = (buf[4] >> 6) & 3;
                        a->lrpcs.vra = (buf[4] >> 3) & 7;
                        a->lrpcs.ucca = (buf[4]) & 7;
                        a->lrpcs.region_mask = buf[5];
                        a->lrpcs.rpc_scheme = buf[6];
                }
                break;

        case DVD_HOST_SEND_RPC_STATE:
                cmd->opcode = GPCMD_SEND_KEY;
                cmd->bytes[8] = 8;
                cmd->bytes[9] = 6 | (0 << 6);
                buf[1] = 6;
                buf[4] = a->hrpcs.pdrc;
                xs->datalen = 8;
                SET(xs->flags, SCSI_DATA_OUT);

                error = scsi_xs_sync(xs);
                scsi_xs_put(xs);
                break;

        default:
                scsi_xs_put(xs);
                error = ENOTTY;
                break;
        }
done:
        dma_free(buf, DVD_AUTH_BUFSIZE);
        return error;
}

#define DVD_READ_PHYSICAL_BUFSIZE (4 + 4 * 20)
int
dvd_read_physical(struct cd_softc *sc, union dvd_struct *s)
{
        struct scsi_generic             *cmd;
        struct dvd_layer                *layer;
        struct scsi_xfer                *xs;
        u_int8_t                        *buf, *bufp;
        int                              error, i;

        buf = dma_alloc(DVD_READ_PHYSICAL_BUFSIZE, PR_WAITOK | PR_ZERO);
        if (buf == NULL)
                return ENOMEM;

        xs = scsi_xs_get(sc->sc_link, SCSI_DATA_IN);
        if (xs == NULL) {
                error = ENOMEM;
                goto done;
        }
        xs->cmdlen = sizeof(*cmd);
        xs->data = buf;
        xs->datalen = DVD_READ_PHYSICAL_BUFSIZE;
        xs->timeout = 30000;

        cmd = &xs->cmd;
        cmd->opcode = GPCMD_READ_DVD_STRUCTURE;
        cmd->bytes[6] = s->type;
        _lto2b(xs->datalen, &cmd->bytes[7]);

        cmd->bytes[5] = s->physical.layer_num;

        error = scsi_xs_sync(xs);
        scsi_xs_put(xs);

        if (error == 0) {
                for (i = 0, bufp = &buf[4], layer = &s->physical.layer[0];
                    i < 4; i++, bufp += 20, layer++) {
                        bzero(layer, sizeof(*layer));
                        layer->book_version = bufp[0] & 0xf;
                        layer->book_type = bufp[0] >> 4;
                        layer->min_rate = bufp[1] & 0xf;
                        layer->disc_size = bufp[1] >> 4;
                        layer->layer_type = bufp[2] & 0xf;
                        layer->track_path = (bufp[2] >> 4) & 1;
                        layer->nlayers = (bufp[2] >> 5) & 3;
                        layer->track_density = bufp[3] & 0xf;
                        layer->linear_density = bufp[3] >> 4;
                        layer->start_sector = _4btol(&bufp[4]);
                        layer->end_sector = _4btol(&bufp[8]);
                        layer->end_sector_l0 = _4btol(&bufp[12]);
                        layer->bca = bufp[16] >> 7;
                }
        }
done:
        dma_free(buf, DVD_READ_PHYSICAL_BUFSIZE);
        return error;
}

#define DVD_READ_COPYRIGHT_BUFSIZE      8
int
dvd_read_copyright(struct cd_softc *sc, union dvd_struct *s)
{
        struct scsi_generic             *cmd;
        struct scsi_xfer                *xs;
        u_int8_t                        *buf;
        int                              error;

        buf = dma_alloc(DVD_READ_COPYRIGHT_BUFSIZE, PR_WAITOK | PR_ZERO);
        if (buf == NULL)
                return ENOMEM;

        xs = scsi_xs_get(sc->sc_link, SCSI_DATA_IN);
        if (xs == NULL) {
                error = ENOMEM;
                goto done;
        }
        xs->cmdlen = sizeof(*cmd);
        xs->data = buf;
        xs->datalen = DVD_READ_COPYRIGHT_BUFSIZE;
        xs->timeout = 30000;

        cmd = &xs->cmd;
        cmd->opcode = GPCMD_READ_DVD_STRUCTURE;
        cmd->bytes[6] = s->type;
        _lto2b(xs->datalen, &cmd->bytes[7]);

        cmd->bytes[5] = s->copyright.layer_num;

        error = scsi_xs_sync(xs);
        scsi_xs_put(xs);

        if (error == 0) {
                s->copyright.cpst = buf[4];
                s->copyright.rmi = buf[5];
        }
done:
        dma_free(buf, DVD_READ_COPYRIGHT_BUFSIZE);
        return error;
}

int
dvd_read_disckey(struct cd_softc *sc, union dvd_struct *s)
{
        struct scsi_read_dvd_structure_data     *buf;
        struct scsi_read_dvd_structure          *cmd;
        struct scsi_xfer                        *xs;
        int                                      error;

        buf = dma_alloc(sizeof(*buf), PR_WAITOK | PR_ZERO);
        if (buf == NULL)
                return ENOMEM;

        xs = scsi_xs_get(sc->sc_link, SCSI_DATA_IN);
        if (xs == NULL) {
                error = ENOMEM;
                goto done;
        }
        xs->cmdlen = sizeof(*cmd);
        xs->data = (void *)buf;
        xs->datalen = sizeof(*buf);
        xs->timeout = 30000;

        cmd = (struct scsi_read_dvd_structure *)&xs->cmd;
        cmd->opcode = GPCMD_READ_DVD_STRUCTURE;
        cmd->format = s->type;
        cmd->agid = s->disckey.agid << 6;
        _lto2b(xs->datalen, cmd->length);

        error = scsi_xs_sync(xs);
        scsi_xs_put(xs);

        if (error == 0)
                memcpy(s->disckey.value, buf->data, sizeof(s->disckey.value));
done:
        dma_free(buf, sizeof(*buf));
        return error;
}

#define DVD_READ_BCA_BUFLEN (4 + 188)

int
dvd_read_bca(struct cd_softc *sc, union dvd_struct *s)
{
        struct scsi_generic             *cmd;
        struct scsi_xfer                *xs;
        u_int8_t                        *buf;
        int                              error;

        buf = dma_alloc(DVD_READ_BCA_BUFLEN, PR_WAITOK | PR_ZERO);
        if (buf == NULL)
                return ENOMEM;

        xs = scsi_xs_get(sc->sc_link, SCSI_DATA_IN);
        if (xs == NULL) {
                error = ENOMEM;
                goto done;
        }
        xs->cmdlen = sizeof(*cmd);
        xs->data = buf;
        xs->datalen = DVD_READ_BCA_BUFLEN;
        xs->timeout = 30000;

        cmd = &xs->cmd;
        cmd->opcode = GPCMD_READ_DVD_STRUCTURE;
        cmd->bytes[6] = s->type;
        _lto2b(xs->datalen, &cmd->bytes[7]);

        error = scsi_xs_sync(xs);
        scsi_xs_put(xs);

        if (error == 0) {
                s->bca.len = _2btol(&buf[0]);
                if (s->bca.len < 12 || s->bca.len > 188)
                        return EIO;
                memcpy(s->bca.value, &buf[4], s->bca.len);
        }
done:
        dma_free(buf, DVD_READ_BCA_BUFLEN);
        return error;
}

int
dvd_read_manufact(struct cd_softc *sc, union dvd_struct *s)
{
        struct scsi_read_dvd_structure_data     *buf;
        struct scsi_read_dvd_structure          *cmd;
        struct scsi_xfer                        *xs;
        int                                      error;

        buf = dma_alloc(sizeof(*buf), PR_WAITOK | PR_ZERO);
        if (buf == NULL)
                return ENOMEM;

        xs = scsi_xs_get(sc->sc_link, SCSI_DATA_IN);
        if (xs == NULL) {
                error = ENOMEM;
                goto done;
        }
        xs->cmdlen = sizeof(*cmd);
        xs->data = (void *)buf;
        xs->datalen = sizeof(*buf);
        xs->timeout = 30000;

        cmd = (struct scsi_read_dvd_structure *)&xs->cmd;
        cmd->opcode = GPCMD_READ_DVD_STRUCTURE;
        cmd->format = s->type;
        _lto2b(xs->datalen, cmd->length);

        error = scsi_xs_sync(xs);
        scsi_xs_put(xs);

        if (error == 0) {
                s->manufact.len = _2btol(buf->len);
                if (s->manufact.len >= 0 && s->manufact.len <= 2048)
                        memcpy(s->manufact.value, buf->data, s->manufact.len);
                else
                        error = EIO;
        }
done:
        dma_free(buf, sizeof(*buf));
        return error;
}

int
dvd_read_struct(struct cd_softc *sc, union dvd_struct *s)
{
        switch (s->type) {
        case DVD_STRUCT_PHYSICAL:
                return dvd_read_physical(sc, s);
        case DVD_STRUCT_COPYRIGHT:
                return dvd_read_copyright(sc, s);
        case DVD_STRUCT_DISCKEY:
                return dvd_read_disckey(sc, s);
        case DVD_STRUCT_BCA:
                return dvd_read_bca(sc, s);
        case DVD_STRUCT_MANUFACT:
                return dvd_read_manufact(sc, s);
        default:
                return EINVAL;
        }
}

int
cd_interpret_sense(struct scsi_xfer *xs)
{
        struct scsi_sense_data          *sense = &xs->sense;
        struct scsi_link                *link = xs->sc_link;
        u_int8_t                         skey = sense->flags & SSD_KEY;
        u_int8_t                         serr = sense->error_code & SSD_ERRCODE;

        if (!ISSET(link->flags, SDEV_OPEN) ||
            (serr != SSD_ERRCODE_CURRENT && serr != SSD_ERRCODE_DEFERRED))
                return scsi_interpret_sense(xs);

        /*
         * We do custom processing in cd for the unit becoming ready
         * case.  We do not allow xs->retries to be decremented on the
         * "Unit Becoming Ready" case. This is because CD drives
         * report "Unit Becoming Ready" when loading media and can
         * take a long time.  Rather than having a massive timeout for
         * all operations (which would cause other problems), we allow
         * operations to wait (but be interruptible with Ctrl-C)
         * forever as long as the drive is reporting that it is
         * becoming ready.  All other cases of not being ready are
         * handled by the default handler.
         */
        switch(skey) {
        case SKEY_NOT_READY:
                if (ISSET(xs->flags, SCSI_IGNORE_NOT_READY))
                        return 0;
                if (ASC_ASCQ(sense) == SENSE_NOT_READY_BECOMING_READY) {
                        SC_DEBUG(link, SDEV_DB1, ("not ready: busy (%#x)\n",
                            sense->add_sense_code_qual));
                        /* don't count this as a retry */
                        xs->retries++;
                        return scsi_delay(xs, 1);
                }
                break;
                /* XXX more to come here for a few other cases */
        default:
                break;
        }
        return scsi_interpret_sense(xs);
}

/*
 * Find out from the device what its capacity is.
 */
u_int64_t
cd_size(struct scsi_link *link, int flags, u_int32_t *blksize)
{
        struct scsi_read_cap_data_16    *rdcap16;
        struct scsi_read_cap_data       *rdcap;
        u_int64_t                        max_addr;
        int                              error;

        if (blksize != NULL)
                *blksize = 0;

        CLR(flags, SCSI_IGNORE_ILLEGAL_REQUEST);

        /*
         * Start with a READ CAPACITY(10).
         */
        rdcap = dma_alloc(sizeof(*rdcap), ((flags & SCSI_NOSLEEP) ?
            PR_NOWAIT : PR_WAITOK) | PR_ZERO);
        if (rdcap == NULL)
                return 0;

        error = scsi_read_cap_10(link, rdcap, flags);
        if (error) {
                dma_free(rdcap, sizeof(*rdcap));
                return 0;
        }

        max_addr = _4btol(rdcap->addr);
        if (blksize != NULL)
                *blksize = _4btol(rdcap->length);
        dma_free(rdcap, sizeof(*rdcap));

        /*
         * pre-SPC (i.e. pre-SCSI-3) devices reporting less than 2^32-1 sectors
         * can stop here.
         */
        if (SID_ANSII_REV(&link->inqdata) < SCSI_REV_SPC &&
            max_addr != 0xffffffff)
                goto exit;

        rdcap16 = dma_alloc(sizeof(*rdcap16), ((flags & SCSI_NOSLEEP) ?
            PR_NOWAIT : PR_WAITOK) | PR_ZERO);
        if (rdcap16 == NULL)
                goto exit;

        error = scsi_read_cap_16(link, rdcap16, flags);
        if (error) {
                dma_free(rdcap16, sizeof(*rdcap16));
                goto exit;
        }

        max_addr = _8btol(rdcap16->addr);
        if (blksize != NULL)
                *blksize = _4btol(rdcap16->length);
        /* XXX The other READ CAPACITY(16) info could be stored away. */
        dma_free(rdcap16, sizeof(*rdcap16));

        return max_addr + 1;

exit:
        /* Return READ CAPACITY 10 values. */
        if (max_addr != 0xffffffff)
                return max_addr + 1;
        else if (blksize != NULL)
                *blksize = 0;
        return 0;
}

#if defined(__macppc__)
int
cd_eject(void)
{
        struct cd_softc                 *sc;
        int                              error = 0;

        if (cd_cd.cd_ndevs == 0 || (sc = cd_cd.cd_devs[0]) == NULL)
                return ENXIO;

        if ((error = disk_lock(&sc->sc_dk)) != 0)
                return error;

        if (sc->sc_dk.dk_openmask == 0) {
                SET(sc->sc_link->flags, SDEV_EJECTING);

                scsi_prevent(sc->sc_link, PR_ALLOW,
                    SCSI_IGNORE_ILLEGAL_REQUEST | SCSI_IGNORE_NOT_READY |
                    SCSI_SILENT | SCSI_IGNORE_MEDIA_CHANGE);
                CLR(sc->sc_link->flags, SDEV_MEDIA_LOADED);

                scsi_start(sc->sc_link, SSS_STOP|SSS_LOEJ, 0);

                CLR(sc->sc_link->flags, SDEV_EJECTING);
        }
        disk_unlock(&sc->sc_dk);

        return error;
}
#endif /* __macppc__ */