e4d5b2502d
when playing, if we stall for 1s with no data advancing, abort and mark the channel dead - fail all future operations
647 lines
18 KiB
C
647 lines
18 KiB
C
/*
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* Copyright (c) 1999 Cameron Grant <gandalf@vilnya.demon.co.uk>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/queue.h>
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#include <dev/sound/pcm/sound.h>
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#define OLDPCM_IOCTL
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static int getchns(snddev_info *d, int chan, pcm_channel **rdch, pcm_channel **wrch);
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static pcm_channel *
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allocchn(snddev_info *d, int direction)
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{
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pcm_channel *chns = (direction == PCMDIR_PLAY)? d->play : d->rec;
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int i, cnt = (direction == PCMDIR_PLAY)? d->playcount : d->reccount;
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for (i = 0; i < cnt; i++) {
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if (!(chns[i].flags & (CHN_F_BUSY | CHN_F_DEAD))) {
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chns[i].flags |= CHN_F_BUSY;
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return &chns[i];
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}
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}
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return NULL;
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}
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static int
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getchns(snddev_info *d, int chan, pcm_channel **rdch, pcm_channel **wrch)
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{
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KASSERT((d->flags & SD_F_PRIO_SET) != SD_F_PRIO_SET, \
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("getchns: read and write both prioritised"));
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if ((d->flags & SD_F_SIMPLEX) && (d->flags & SD_F_PRIO_SET)) {
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*rdch = (d->flags & SD_F_PRIO_RD)? d->arec[chan] : &d->fakechan;
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*wrch = (d->flags & SD_F_PRIO_WR)? d->aplay[chan] : &d->fakechan;
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d->fakechan.flags |= CHN_F_BUSY;
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} else {
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*rdch = d->arec[chan];
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*wrch = d->aplay[chan];
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}
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return 0;
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}
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static void
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setchns(snddev_info *d, int chan)
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{
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KASSERT((d->flags & SD_F_PRIO_SET) != SD_F_PRIO_SET, \
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("getchns: read and write both prioritised"));
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d->flags |= SD_F_DIR_SET;
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if (d->swap) d->swap(d->devinfo, (d->flags & SD_F_PRIO_WR)? PCMDIR_PLAY : PCMDIR_REC);
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}
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int
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dsp_open(snddev_info *d, int chan, int oflags, int devtype)
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{
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pcm_channel *rdch, *wrch;
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u_int32_t fmt;
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if (chan >= d->chancount) return ENODEV;
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if ((d->flags & SD_F_SIMPLEX) && (d->ref[chan] > 0)) return EBUSY;
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rdch = d->arec[chan];
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wrch = d->aplay[chan];
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if (oflags & FREAD) {
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if (rdch == NULL) {
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rdch = allocchn(d, PCMDIR_REC);
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if (!rdch) return EBUSY;
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} else return EBUSY;
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}
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if (oflags & FWRITE) {
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if (wrch == NULL) {
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wrch = allocchn(d, PCMDIR_PLAY);
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if (!wrch) {
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if (rdch && (oflags & FREAD))
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rdch->flags &= ~CHN_F_BUSY;
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return EBUSY;
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}
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} else return EBUSY;
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}
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d->aplay[chan] = wrch;
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d->arec[chan] = rdch;
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d->ref[chan]++;
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switch (devtype) {
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case SND_DEV_DSP16:
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fmt = AFMT_S16_LE;
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break;
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case SND_DEV_DSP:
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fmt = AFMT_U8;
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break;
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case SND_DEV_AUDIO:
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fmt = AFMT_MU_LAW;
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break;
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case SND_DEV_NORESET:
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fmt = 0;
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break;
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default:
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return ENXIO;
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}
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if (rdch && (oflags & FREAD)) {
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chn_reset(rdch, fmt);
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if (oflags & O_NONBLOCK) rdch->flags |= CHN_F_NBIO;
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}
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if (wrch && (oflags & FWRITE)) {
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chn_reset(wrch, fmt);
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if (oflags & O_NONBLOCK) wrch->flags |= CHN_F_NBIO;
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}
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return 0;
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}
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int
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dsp_close(snddev_info *d, int chan, int devtype)
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{
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pcm_channel *rdch, *wrch;
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d->ref[chan]--;
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if (d->ref[chan]) return 0;
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d->flags &= ~SD_F_TRANSIENT;
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rdch = d->arec[chan];
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wrch = d->aplay[chan];
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if (rdch) {
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chn_abort(rdch);
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rdch->flags &= ~(CHN_F_BUSY | CHN_F_RUNNING | CHN_F_MAPPED);
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chn_reset(rdch, 0);
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}
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if (wrch) {
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chn_flush(wrch);
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wrch->flags &= ~(CHN_F_BUSY | CHN_F_RUNNING | CHN_F_MAPPED);
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chn_reset(wrch, 0);
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}
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d->aplay[chan] = NULL;
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d->arec[chan] = NULL;
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return 0;
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}
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int
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dsp_read(snddev_info *d, int chan, struct uio *buf, int flag)
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{
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pcm_channel *rdch, *wrch;
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if (!(d->flags & SD_F_PRIO_SET)) d->flags |= SD_F_PRIO_RD;
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if (!(d->flags & SD_F_DIR_SET)) setchns(d, chan);
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getchns(d, chan, &rdch, &wrch);
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KASSERT(rdch, ("dsp_read: nonexistant channel"));
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KASSERT(rdch->flags & CHN_F_BUSY, ("dsp_read: nonbusy channel"));
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if (rdch->flags & (CHN_F_MAPPED | CHN_F_DEAD)) return EINVAL;
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if (!(rdch->flags & CHN_F_RUNNING))
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rdch->flags |= CHN_F_RUNNING;
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return chn_read(rdch, buf);
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}
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int
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dsp_write(snddev_info *d, int chan, struct uio *buf, int flag)
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{
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pcm_channel *rdch, *wrch;
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if (!(d->flags & SD_F_PRIO_SET)) d->flags |= SD_F_PRIO_WR;
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if (!(d->flags & SD_F_DIR_SET)) setchns(d, chan);
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getchns(d, chan, &rdch, &wrch);
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KASSERT(wrch, ("dsp_write: nonexistant channel"));
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KASSERT(wrch->flags & CHN_F_BUSY, ("dsp_write: nonbusy channel"));
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if (wrch->flags & (CHN_F_MAPPED | CHN_F_DEAD)) return EINVAL;
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if (!(wrch->flags & CHN_F_RUNNING))
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wrch->flags |= CHN_F_RUNNING;
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return chn_write(wrch, buf);
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}
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int
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dsp_ioctl(snddev_info *d, int chan, u_long cmd, caddr_t arg)
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{
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int ret = 0, *arg_i = (int *)arg;
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u_long s;
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pcm_channel *wrch = NULL, *rdch = NULL;
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rdch = d->arec[chan];
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wrch = d->aplay[chan];
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if (rdch && (rdch->flags & CHN_F_DEAD))
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rdch = NULL;
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if (wrch && (wrch->flags & CHN_F_DEAD))
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wrch = NULL;
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if (!(rdch || wrch))
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return EINVAL;
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/*
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* all routines are called with int. blocked. Make sure that
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* ints are re-enabled when calling slow or blocking functions!
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*/
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s = spltty();
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switch(cmd) {
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#ifdef OLDPCM_IOCTL
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/*
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* we start with the new ioctl interface.
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*/
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case AIONWRITE: /* how many bytes can write ? */
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if (wrch && wrch->buffer.dl)
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while (chn_wrfeed(wrch) > 0);
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*arg_i = wrch? wrch->buffer2nd.fl : 0;
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break;
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case AIOSSIZE: /* set the current blocksize */
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{
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struct snd_size *p = (struct snd_size *)arg;
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if (wrch)
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chn_setblocksize(wrch, 2, p->play_size);
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if (rdch)
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chn_setblocksize(rdch, 2, p->rec_size);
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}
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/* FALLTHROUGH */
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case AIOGSIZE: /* get the current blocksize */
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{
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struct snd_size *p = (struct snd_size *)arg;
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if (wrch) p->play_size = wrch->buffer2nd.blksz;
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if (rdch) p->rec_size = rdch->buffer2nd.blksz;
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}
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break;
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case AIOSFMT:
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{
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snd_chan_param *p = (snd_chan_param *)arg;
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if (wrch) {
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chn_setformat(wrch, p->play_format);
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chn_setspeed(wrch, p->play_rate);
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}
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if (rdch) {
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chn_setformat(rdch, p->rec_format);
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chn_setspeed(rdch, p->rec_rate);
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}
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}
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/* FALLTHROUGH */
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case AIOGFMT:
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{
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snd_chan_param *p = (snd_chan_param *)arg;
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p->play_rate = wrch? wrch->speed : 0;
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p->rec_rate = rdch? rdch->speed : 0;
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p->play_format = wrch? wrch->format : 0;
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p->rec_format = rdch? rdch->format : 0;
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}
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break;
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case AIOGCAP: /* get capabilities */
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{
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snd_capabilities *p = (snd_capabilities *)arg;
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pcmchan_caps *pcaps = NULL, *rcaps = NULL;
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if (rdch) rcaps = chn_getcaps(rdch);
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if (wrch) pcaps = chn_getcaps(wrch);
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p->rate_min = max(rcaps? rcaps->minspeed : 0,
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pcaps? pcaps->minspeed : 0);
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p->rate_max = min(rcaps? rcaps->maxspeed : 1000000,
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pcaps? pcaps->maxspeed : 1000000);
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p->bufsize = min(rdch? rdch->buffer2nd.bufsize : 1000000,
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wrch? wrch->buffer2nd.bufsize : 1000000);
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/* XXX bad on sb16 */
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p->formats = (rcaps? rcaps->formats : 0xffffffff) &
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(pcaps? pcaps->formats : 0xffffffff);
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if (rdch && wrch)
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p->formats |= (d->flags & SD_F_SIMPLEX)? 0 : AFMT_FULLDUPLEX;
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p->mixers = 1; /* default: one mixer */
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p->inputs = d->mixer.devs;
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p->left = p->right = 100;
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}
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break;
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case AIOSTOP:
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if (*arg_i == AIOSYNC_PLAY && wrch) *arg_i = chn_abort(wrch);
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else if (*arg_i == AIOSYNC_CAPTURE && rdch) *arg_i = chn_abort(rdch);
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else {
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printf("AIOSTOP: bad channel 0x%x\n", *arg_i);
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*arg_i = 0;
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}
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break;
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case AIOSYNC:
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printf("AIOSYNC chan 0x%03lx pos %lu unimplemented\n",
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((snd_sync_parm *)arg)->chan, ((snd_sync_parm *)arg)->pos);
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break;
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#endif
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/*
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* here follow the standard ioctls (filio.h etc.)
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*/
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case FIONREAD: /* get # bytes to read */
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if (rdch && rdch->buffer.dl)
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while (chn_rdfeed(rdch) > 0);
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*arg_i = rdch? rdch->buffer2nd.rl : 0;
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break;
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case FIOASYNC: /*set/clear async i/o */
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DEB( printf("FIOASYNC\n") ; )
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break;
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case SNDCTL_DSP_NONBLOCK:
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case FIONBIO: /* set/clear non-blocking i/o */
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if (rdch) rdch->flags &= ~CHN_F_NBIO;
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if (wrch) wrch->flags &= ~CHN_F_NBIO;
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if (*arg_i) {
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if (rdch) rdch->flags |= CHN_F_NBIO;
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if (wrch) wrch->flags |= CHN_F_NBIO;
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}
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break;
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/*
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* Finally, here is the linux-compatible ioctl interface
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*/
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#define THE_REAL_SNDCTL_DSP_GETBLKSIZE _IOWR('P', 4, int)
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case THE_REAL_SNDCTL_DSP_GETBLKSIZE:
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case SNDCTL_DSP_GETBLKSIZE:
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if (wrch)
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*arg_i = wrch->buffer2nd.blksz;
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else if (rdch)
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*arg_i = rdch->buffer2nd.blksz;
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else
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*arg_i = 0;
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break ;
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case SNDCTL_DSP_SETBLKSIZE:
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RANGE(*arg_i, 16, 65536);
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if (wrch) chn_setblocksize(wrch, 2, *arg_i);
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if (rdch) chn_setblocksize(rdch, 2, *arg_i);
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break;
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case SNDCTL_DSP_RESET:
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DEB(printf("dsp reset\n"));
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splx(s);
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if (wrch) chn_abort(wrch);
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if (rdch) chn_abort(rdch);
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break;
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case SNDCTL_DSP_SYNC:
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DEB(printf("dsp sync\n"));
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splx(s);
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if (wrch) chn_sync(wrch, wrch->buffer2nd.bufsize - 4);
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break;
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case SNDCTL_DSP_SPEED:
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splx(s);
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if (wrch)
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ret = chn_setspeed(wrch, *arg_i);
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if (rdch && ret == 0)
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ret = chn_setspeed(rdch, *arg_i);
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/* fallthru */
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case SOUND_PCM_READ_RATE:
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*arg_i = wrch? wrch->speed : rdch->speed;
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break;
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case SNDCTL_DSP_STEREO:
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splx(s);
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if (wrch)
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ret = chn_setformat(wrch, (wrch->format & ~AFMT_STEREO) |
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((*arg_i)? AFMT_STEREO : 0));
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if (rdch && ret == 0)
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ret = chn_setformat(rdch, (rdch->format & ~AFMT_STEREO) |
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((*arg_i)? AFMT_STEREO : 0));
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*arg_i = ((wrch? wrch->format : rdch->format) & AFMT_STEREO)? 1 : 0;
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break;
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case SOUND_PCM_WRITE_CHANNELS:
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/* case SNDCTL_DSP_CHANNELS: ( == SOUND_PCM_WRITE_CHANNELS) */
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splx(s);
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if (*arg_i == 1 || *arg_i == 2) {
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if (wrch)
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ret = chn_setformat(wrch, (wrch->format & ~AFMT_STEREO) |
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((*arg_i == 2)? AFMT_STEREO : 0));
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if (rdch && ret == 0)
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ret = chn_setformat(rdch, (rdch->format & ~AFMT_STEREO) |
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((*arg_i == 2)? AFMT_STEREO : 0));
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*arg_i = ((wrch? wrch->format : rdch->format) & AFMT_STEREO)? 2 : 1;
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} else
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*arg_i = 0;
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break;
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case SOUND_PCM_READ_CHANNELS:
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*arg_i = ((wrch? wrch->format : rdch->format) & AFMT_STEREO)? 2 : 1;
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break;
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case SNDCTL_DSP_GETFMTS: /* returns a mask of supported fmts */
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*arg_i = wrch? chn_getcaps(wrch)->formats : chn_getcaps(rdch)->formats;
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break ;
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case SNDCTL_DSP_SETFMT: /* sets _one_ format */
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splx(s);
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if (wrch)
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ret = chn_setformat(wrch, (*arg_i) | (wrch->format & AFMT_STEREO));
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if (rdch && ret == 0)
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ret = chn_setformat(rdch, (*arg_i) | (rdch->format & AFMT_STEREO));
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*arg_i = (wrch? wrch->format: rdch->format) & ~AFMT_STEREO;
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break;
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case SNDCTL_DSP_SUBDIVIDE:
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/* XXX watch out, this is RW! */
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printf("SNDCTL_DSP_SUBDIVIDE unimplemented\n");
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break;
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case SNDCTL_DSP_SETFRAGMENT:
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DEB(printf("SNDCTL_DSP_SETFRAGMENT 0x%08x\n", *(int *)arg));
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{
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pcm_channel *c = wrch? wrch : rdch;
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u_int32_t fragln = (*arg_i) & 0x0000ffff;
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u_int32_t maxfrags = ((*arg_i) & 0xffff0000) >> 16;
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u_int32_t fragsz;
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RANGE(fragln, 4, 16);
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fragsz = 1 << fragln;
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if (maxfrags == 0)
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maxfrags = CHN_2NDBUFMAXSIZE / fragsz;
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if (maxfrags < 2) {
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ret = EINVAL;
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break;
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}
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if (maxfrags * fragsz > CHN_2NDBUFMAXSIZE)
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maxfrags = CHN_2NDBUFMAXSIZE / fragsz;
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DEB(printf("SNDCTL_DSP_SETFRAGMENT %d frags, %d sz\n", maxfrags, fragsz));
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if (rdch)
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ret = chn_setblocksize(rdch, maxfrags, fragsz);
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if (wrch && ret == 0)
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ret = chn_setblocksize(wrch, maxfrags, fragsz);
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fragsz = c->buffer2nd.blksz;
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fragln = 0;
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while (fragsz > 1) {
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fragln++;
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fragsz >>= 1;
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}
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*arg_i = (c->buffer2nd.blkcnt << 16) | fragln;
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}
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break;
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|
|
|
case SNDCTL_DSP_GETISPACE: /* XXX Space for reading? Makes no sense... */
|
|
/* return the size of data available in the input queue */
|
|
{
|
|
audio_buf_info *a = (audio_buf_info *)arg;
|
|
if (rdch) {
|
|
snd_dbuf *b = &rdch->buffer;
|
|
snd_dbuf *bs = &rdch->buffer2nd;
|
|
if (b->dl && !(rdch->flags & CHN_F_MAPPED))
|
|
/*
|
|
* Suck up the secondary and DMA buffer.
|
|
* chn_rdfeed*() takes care of the alignment.
|
|
*/
|
|
while (chn_rdfeed(rdch) > 0);
|
|
a->bytes = bs->rl;
|
|
a->fragments = a->bytes / rdch->buffer2nd.blksz;
|
|
a->fragstotal = rdch->buffer2nd.blkcnt;
|
|
a->fragsize = rdch->buffer2nd.blksz;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case SNDCTL_DSP_GETOSPACE:
|
|
/* return space available in the output queue */
|
|
{
|
|
audio_buf_info *a = (audio_buf_info *)arg;
|
|
if (wrch) {
|
|
snd_dbuf *b = &wrch->buffer;
|
|
snd_dbuf *bs = &wrch->buffer2nd;
|
|
if (b->dl && !(wrch->flags & CHN_F_MAPPED)) {
|
|
/*
|
|
* Fill up the secondary and DMA buffer.
|
|
* chn_wrfeed*() takes care of the alignment.
|
|
* Check for underflow before writing into the buffers.
|
|
*/
|
|
chn_checkunderflow(wrch);
|
|
while (chn_wrfeed(wrch) > 0);
|
|
}
|
|
a->bytes = bs->fl;
|
|
a->fragments = a->bytes / wrch->buffer2nd.blksz;
|
|
a->fragstotal = wrch->buffer2nd.blkcnt;
|
|
a->fragsize = wrch->buffer2nd.blksz;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case SNDCTL_DSP_GETIPTR:
|
|
{
|
|
count_info *a = (count_info *)arg;
|
|
if (rdch) {
|
|
snd_dbuf *b = &rdch->buffer;
|
|
snd_dbuf *bs = &rdch->buffer2nd;
|
|
if (b->dl && !(rdch->flags & CHN_F_MAPPED))
|
|
/*
|
|
* Suck up the secondary and DMA buffer.
|
|
* chn_rdfeed*() takes care of the alignment.
|
|
*/
|
|
while (chn_rdfeed(rdch) > 0);
|
|
a->bytes = bs->total;
|
|
a->blocks = rdch->blocks;
|
|
a->ptr = bs->rp;
|
|
rdch->blocks = 0;
|
|
} else ret = EINVAL;
|
|
}
|
|
break;
|
|
|
|
case SNDCTL_DSP_GETOPTR:
|
|
{
|
|
count_info *a = (count_info *)arg;
|
|
if (wrch) {
|
|
snd_dbuf *b = &wrch->buffer;
|
|
snd_dbuf *bs = &wrch->buffer2nd;
|
|
if (b->dl && !(wrch->flags & CHN_F_MAPPED)) {
|
|
/*
|
|
* Fill up the secondary and DMA buffer.
|
|
* chn_wrfeed*() takes care of the alignment.
|
|
* Check for underflow before writing into the buffers.
|
|
*/
|
|
chn_checkunderflow(wrch);
|
|
while (chn_wrfeed(wrch) > 0);
|
|
}
|
|
a->bytes = bs->total;
|
|
a->blocks = wrch->blocks;
|
|
a->ptr = bs->rp;
|
|
wrch->blocks = 0;
|
|
} else ret = EINVAL;
|
|
}
|
|
break;
|
|
|
|
case SNDCTL_DSP_GETCAPS:
|
|
*arg_i = DSP_CAP_REALTIME | DSP_CAP_MMAP | DSP_CAP_TRIGGER;
|
|
if (rdch && wrch && !(d->flags & SD_F_SIMPLEX))
|
|
*arg_i |= DSP_CAP_DUPLEX;
|
|
break;
|
|
|
|
case SOUND_PCM_READ_BITS:
|
|
*arg_i = ((wrch? wrch->format : rdch->format) & AFMT_16BIT)? 16 : 8;
|
|
break;
|
|
|
|
case SNDCTL_DSP_SETTRIGGER:
|
|
if (rdch) {
|
|
rdch->flags &= ~(CHN_F_TRIGGERED | CHN_F_NOTRIGGER);
|
|
if (*arg_i & PCM_ENABLE_INPUT)
|
|
rdch->flags |= CHN_F_TRIGGERED;
|
|
else
|
|
rdch->flags |= CHN_F_NOTRIGGER;
|
|
chn_intr(rdch);
|
|
}
|
|
if (wrch) {
|
|
wrch->flags &= ~(CHN_F_TRIGGERED | CHN_F_NOTRIGGER);
|
|
if (*arg_i & PCM_ENABLE_OUTPUT)
|
|
wrch->flags |= CHN_F_TRIGGERED;
|
|
else
|
|
wrch->flags |= CHN_F_NOTRIGGER;
|
|
chn_intr(wrch);
|
|
}
|
|
break;
|
|
|
|
case SNDCTL_DSP_GETTRIGGER:
|
|
*arg_i = 0;
|
|
if (wrch && wrch->flags & CHN_F_TRIGGERED)
|
|
*arg_i |= PCM_ENABLE_OUTPUT;
|
|
if (rdch && rdch->flags & CHN_F_TRIGGERED)
|
|
*arg_i |= PCM_ENABLE_INPUT;
|
|
break;
|
|
|
|
case SNDCTL_DSP_GETODELAY:
|
|
if (wrch) {
|
|
snd_dbuf *b = &wrch->buffer;
|
|
if (b->dl) {
|
|
chn_checkunderflow(wrch);
|
|
if (!(wrch->flags & CHN_F_MAPPED))
|
|
while (chn_wrfeed(wrch) > 0);
|
|
}
|
|
*arg = b->total;
|
|
} else
|
|
ret = EINVAL;
|
|
break;
|
|
|
|
case SNDCTL_DSP_MAPINBUF:
|
|
case SNDCTL_DSP_MAPOUTBUF:
|
|
case SNDCTL_DSP_SETSYNCRO:
|
|
/* undocumented */
|
|
|
|
case SNDCTL_DSP_POST:
|
|
case SOUND_PCM_WRITE_FILTER:
|
|
case SOUND_PCM_READ_FILTER:
|
|
/* dunno what these do, don't sound important */
|
|
default:
|
|
DEB(printf("default ioctl chan%d fn 0x%08lx fail\n", chan, cmd));
|
|
ret = EINVAL;
|
|
break;
|
|
}
|
|
splx(s);
|
|
return ret;
|
|
}
|
|
|
|
int
|
|
dsp_poll(snddev_info *d, int chan, int events, struct proc *p)
|
|
{
|
|
int ret = 0, e;
|
|
pcm_channel *wrch = NULL, *rdch = NULL;
|
|
|
|
getchns(d, chan, &rdch, &wrch);
|
|
e = events & (POLLOUT | POLLWRNORM);
|
|
if (wrch && e) ret |= chn_poll(wrch, e, p);
|
|
e = events & (POLLIN | POLLRDNORM);
|
|
if (rdch && e) ret |= chn_poll(rdch, e, p);
|
|
return ret;
|
|
}
|
|
|
|
int
|
|
dsp_mmap(snddev_info *d, int chan, vm_offset_t offset, int nprot)
|
|
{
|
|
pcm_channel *wrch = NULL, *rdch = NULL, *c = NULL;
|
|
|
|
getchns(d, chan, &rdch, &wrch);
|
|
/* XXX this is broken by line 204 of vm/device_pager.c, so force write buffer */
|
|
if (1 || (wrch && (nprot & PROT_WRITE)))
|
|
c = wrch;
|
|
else if (rdch && (nprot & PROT_READ))
|
|
c = rdch;
|
|
if (c && (c->format == c->buffer.fmt)) {
|
|
c->flags |= CHN_F_MAPPED;
|
|
return atop(vtophys(c->buffer2nd.buf + offset));
|
|
} else
|
|
return -1;
|
|
}
|
|
|