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Diffstat (limited to 'sys/dev/sound/pcm/dsp.c')
-rw-r--r--sys/dev/sound/pcm/dsp.c341
1 files changed, 253 insertions, 88 deletions
diff --git a/sys/dev/sound/pcm/dsp.c b/sys/dev/sound/pcm/dsp.c
index aa6ad4a59778..62db4592f206 100644
--- a/sys/dev/sound/pcm/dsp.c
+++ b/sys/dev/sound/pcm/dsp.c
@@ -72,8 +72,6 @@ SYSCTL_INT(_hw_snd, OID_AUTO, basename_clone, CTLFLAG_RWTUN,
#define DSP_F_READ(x) ((x) & FREAD)
#define DSP_F_WRITE(x) ((x) & FWRITE)
-#define OLDPCM_IOCTL
-
static d_open_t dsp_open;
static d_read_t dsp_read;
static d_write_t dsp_write;
@@ -81,17 +79,19 @@ static d_ioctl_t dsp_ioctl;
static d_poll_t dsp_poll;
static d_mmap_t dsp_mmap;
static d_mmap_single_t dsp_mmap_single;
+static d_kqfilter_t dsp_kqfilter;
struct cdevsw dsp_cdevsw = {
- .d_version = D_VERSION,
- .d_open = dsp_open,
- .d_read = dsp_read,
- .d_write = dsp_write,
- .d_ioctl = dsp_ioctl,
- .d_poll = dsp_poll,
- .d_mmap = dsp_mmap,
- .d_mmap_single = dsp_mmap_single,
- .d_name = "dsp",
+ .d_version = D_VERSION,
+ .d_open = dsp_open,
+ .d_read = dsp_read,
+ .d_write = dsp_write,
+ .d_ioctl = dsp_ioctl,
+ .d_poll = dsp_poll,
+ .d_kqfilter = dsp_kqfilter,
+ .d_mmap = dsp_mmap,
+ .d_mmap_single = dsp_mmap_single,
+ .d_name = "dsp",
};
static eventhandler_tag dsp_ehtag = NULL;
@@ -299,7 +299,7 @@ dsp_close(void *data)
CHN_LOCK(rdch);
chn_abort(rdch); /* won't sleep */
rdch->flags &= ~(CHN_F_RUNNING | CHN_F_MMAP |
- CHN_F_DEAD | CHN_F_EXCLUSIVE);
+ CHN_F_DEAD | CHN_F_EXCLUSIVE | CHN_F_NBIO);
chn_reset(rdch, 0, 0);
chn_release(rdch);
if (rdch->flags & CHN_F_VIRTUAL) {
@@ -323,7 +323,7 @@ dsp_close(void *data)
CHN_LOCK(wrch);
chn_flush(wrch); /* may sleep */
wrch->flags &= ~(CHN_F_RUNNING | CHN_F_MMAP |
- CHN_F_DEAD | CHN_F_EXCLUSIVE);
+ CHN_F_DEAD | CHN_F_EXCLUSIVE | CHN_F_NBIO);
chn_reset(wrch, 0, 0);
chn_release(wrch);
if (wrch->flags & CHN_F_VIRTUAL) {
@@ -462,14 +462,9 @@ static __inline int
dsp_io_ops(struct dsp_cdevpriv *priv, struct uio *buf)
{
struct snddev_info *d;
- struct pcm_channel **ch;
+ struct pcm_channel *ch;
int (*chn_io)(struct pcm_channel *, struct uio *);
- int prio, ret;
- pid_t runpid;
-
- KASSERT(buf != NULL &&
- (buf->uio_rw == UIO_READ || buf->uio_rw == UIO_WRITE),
- ("%s(): io train wreck!", __func__));
+ int ret;
d = priv->sc;
if (!DSP_REGISTERED(d))
@@ -479,53 +474,39 @@ dsp_io_ops(struct dsp_cdevpriv *priv, struct uio *buf)
switch (buf->uio_rw) {
case UIO_READ:
- prio = FREAD;
- ch = &priv->rdch;
+ ch = priv->rdch;
chn_io = chn_read;
break;
case UIO_WRITE:
- prio = FWRITE;
- ch = &priv->wrch;
+ ch = priv->wrch;
chn_io = chn_write;
break;
- default:
- panic("invalid/corrupted uio direction: %d", buf->uio_rw);
- break;
}
-
- runpid = buf->uio_td->td_proc->p_pid;
-
- dsp_lock_chans(priv, prio);
-
- if (*ch == NULL || !((*ch)->flags & CHN_F_BUSY)) {
- if (priv->rdch != NULL || priv->wrch != NULL)
- dsp_unlock_chans(priv, prio);
+ if (ch == NULL) {
PCM_GIANT_EXIT(d);
- return (EBADF);
+ return (ENXIO);
}
+ CHN_LOCK(ch);
- if (((*ch)->flags & (CHN_F_MMAP | CHN_F_DEAD)) ||
- (((*ch)->flags & CHN_F_RUNNING) && (*ch)->pid != runpid)) {
- dsp_unlock_chans(priv, prio);
+ if (!(ch->flags & CHN_F_BUSY) ||
+ (ch->flags & (CHN_F_MMAP | CHN_F_DEAD))) {
+ CHN_UNLOCK(ch);
PCM_GIANT_EXIT(d);
- return (EINVAL);
- } else if (!((*ch)->flags & CHN_F_RUNNING)) {
- (*ch)->flags |= CHN_F_RUNNING;
- (*ch)->pid = runpid;
- }
+ return (ENXIO);
+ } else if (!(ch->flags & CHN_F_RUNNING))
+ ch->flags |= CHN_F_RUNNING;
/*
* chn_read/write must give up channel lock in order to copy bytes
* from/to userland, so up the "in progress" counter to make sure
* someone else doesn't come along and muss up the buffer.
*/
- ++(*ch)->inprog;
- ret = chn_io(*ch, buf);
- --(*ch)->inprog;
-
- CHN_BROADCAST(&(*ch)->cv);
+ ch->inprog++;
+ ret = chn_io(ch, buf);
+ ch->inprog--;
- dsp_unlock_chans(priv, prio);
+ CHN_BROADCAST(&ch->cv);
+ CHN_UNLOCK(ch);
PCM_GIANT_LEAVE(d);
@@ -671,6 +652,43 @@ dsp_ioctl_channel(struct dsp_cdevpriv *priv, struct pcm_channel *ch,
return (0);
}
+#ifdef COMPAT_FREEBSD32
+typedef struct _snd_chan_param32 {
+ uint32_t play_rate;
+ uint32_t rec_rate;
+ uint32_t play_format;
+ uint32_t rec_format;
+} snd_chan_param32;
+#define AIOGFMT32 _IOC_NEWTYPE(AIOGFMT, snd_chan_param32)
+#define AIOSFMT32 _IOC_NEWTYPE(AIOSFMT, snd_chan_param32)
+
+typedef struct _snd_capabilities32 {
+ uint32_t rate_min, rate_max;
+ uint32_t formats;
+ uint32_t bufsize;
+ uint32_t mixers;
+ uint32_t inputs;
+ uint16_t left, right;
+} snd_capabilities32;
+#define AIOGCAP32 _IOC_NEWTYPE(AIOGCAP, snd_capabilities32)
+
+typedef struct audio_errinfo32
+{
+ int32_t play_underruns;
+ int32_t rec_overruns;
+ uint32_t play_ptradjust;
+ uint32_t rec_ptradjust;
+ int32_t play_errorcount;
+ int32_t rec_errorcount;
+ int32_t play_lasterror;
+ int32_t rec_lasterror;
+ int32_t play_errorparm;
+ int32_t rec_errorparm;
+ int32_t filler[16];
+} audio_errinfo32;
+#define SNDCTL_DSP_GETERROR32 _IOC_NEWTYPE(SNDCTL_DSP_GETERROR, audio_errinfo32)
+#endif
+
static int
dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode,
struct thread *td)
@@ -769,10 +787,6 @@ dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode,
}
switch(cmd) {
-#ifdef OLDPCM_IOCTL
- /*
- * we start with the new ioctl interface.
- */
case AIONWRITE: /* how many bytes can write ? */
if (wrch) {
CHN_LOCK(wrch);
@@ -798,13 +812,13 @@ dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode,
if (wrch) {
CHN_LOCK(wrch);
chn_setblocksize(wrch, 2, p->play_size);
- p->play_size = sndbuf_getblksz(wrch->bufsoft);
+ p->play_size = wrch->bufsoft->blksz;
CHN_UNLOCK(wrch);
}
if (rdch) {
CHN_LOCK(rdch);
chn_setblocksize(rdch, 2, p->rec_size);
- p->rec_size = sndbuf_getblksz(rdch->bufsoft);
+ p->rec_size = rdch->bufsoft->blksz;
CHN_UNLOCK(rdch);
}
PCM_RELEASE_QUICK(d);
@@ -816,12 +830,12 @@ dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode,
if (wrch) {
CHN_LOCK(wrch);
- p->play_size = sndbuf_getblksz(wrch->bufsoft);
+ p->play_size = wrch->bufsoft->blksz;
CHN_UNLOCK(wrch);
}
if (rdch) {
CHN_LOCK(rdch);
- p->rec_size = sndbuf_getblksz(rdch->bufsoft);
+ p->rec_size = rdch->bufsoft->blksz;
CHN_UNLOCK(rdch);
}
}
@@ -829,9 +843,25 @@ dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode,
case AIOSFMT:
case AIOGFMT:
+#ifdef COMPAT_FREEBSD32
+ case AIOSFMT32:
+ case AIOGFMT32:
+#endif
{
snd_chan_param *p = (snd_chan_param *)arg;
+#ifdef COMPAT_FREEBSD32
+ snd_chan_param32 *p32 = (snd_chan_param32 *)arg;
+ snd_chan_param param;
+
+ if (cmd == AIOSFMT32) {
+ p = &param;
+ p->play_rate = p32->play_rate;
+ p->rec_rate = p32->rec_rate;
+ p->play_format = p32->play_format;
+ p->rec_format = p32->rec_format;
+ }
+#endif
if (cmd == AIOSFMT &&
((p->play_format != 0 && p->play_rate == 0) ||
(p->rec_format != 0 && p->rec_rate == 0))) {
@@ -872,15 +902,41 @@ dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode,
p->rec_format = 0;
}
PCM_RELEASE_QUICK(d);
+#ifdef COMPAT_FREEBSD32
+ if (cmd == AIOSFMT32 || cmd == AIOGFMT32) {
+ p32->play_rate = p->play_rate;
+ p32->rec_rate = p->rec_rate;
+ p32->play_format = p->play_format;
+ p32->rec_format = p->rec_format;
+ }
+#endif
}
break;
case AIOGCAP: /* get capabilities */
+#ifdef COMPAT_FREEBSD32
+ case AIOGCAP32:
+#endif
{
snd_capabilities *p = (snd_capabilities *)arg;
struct pcmchan_caps *pcaps = NULL, *rcaps = NULL;
struct cdev *pdev;
-
+#ifdef COMPAT_FREEBSD32
+ snd_capabilities32 *p32 = (snd_capabilities32 *)arg;
+ snd_capabilities capabilities;
+
+ if (cmd == AIOGCAP32) {
+ p = &capabilities;
+ p->rate_min = p32->rate_min;
+ p->rate_max = p32->rate_max;
+ p->formats = p32->formats;
+ p->bufsize = p32->bufsize;
+ p->mixers = p32->mixers;
+ p->inputs = p32->inputs;
+ p->left = p32->left;
+ p->right = p32->right;
+ }
+#endif
PCM_LOCK(d);
if (rdch) {
CHN_LOCK(rdch);
@@ -894,8 +950,8 @@ dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode,
pcaps? pcaps->minspeed : 0);
p->rate_max = min(rcaps? rcaps->maxspeed : 1000000,
pcaps? pcaps->maxspeed : 1000000);
- p->bufsize = min(rdch? sndbuf_getsize(rdch->bufsoft) : 1000000,
- wrch? sndbuf_getsize(wrch->bufsoft) : 1000000);
+ p->bufsize = min(rdch? rdch->bufsoft->bufsize : 1000000,
+ wrch? wrch->bufsoft->bufsize : 1000000);
/* XXX bad on sb16 */
p->formats = (rdch? chn_getformats(rdch) : 0xffffffff) &
(wrch? chn_getformats(wrch) : 0xffffffff);
@@ -913,6 +969,18 @@ dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode,
if (rdch)
CHN_UNLOCK(rdch);
PCM_UNLOCK(d);
+#ifdef COMPAT_FREEBSD32
+ if (cmd == AIOGCAP32) {
+ p32->rate_min = p->rate_min;
+ p32->rate_max = p->rate_max;
+ p32->formats = p->formats;
+ p32->bufsize = p->bufsize;
+ p32->mixers = p->mixers;
+ p32->inputs = p->inputs;
+ p32->left = p->left;
+ p32->right = p->right;
+ }
+#endif
}
break;
@@ -935,10 +1003,6 @@ dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode,
printf("AIOSYNC chan 0x%03lx pos %lu unimplemented\n",
((snd_sync_parm *)arg)->chan, ((snd_sync_parm *)arg)->pos);
break;
-#endif
- /*
- * here follow the standard ioctls (filio.h etc.)
- */
case FIONREAD: /* get # bytes to read */
if (rdch) {
CHN_LOCK(rdch);
@@ -977,16 +1041,11 @@ dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode,
}
break;
- /*
- * Finally, here is the linux-compatible ioctl interface
- */
-#define THE_REAL_SNDCTL_DSP_GETBLKSIZE _IOWR('P', 4, int)
- case THE_REAL_SNDCTL_DSP_GETBLKSIZE:
case SNDCTL_DSP_GETBLKSIZE:
chn = wrch ? wrch : rdch;
if (chn) {
CHN_LOCK(chn);
- *arg_i = sndbuf_getblksz(chn->bufsoft);
+ *arg_i = chn->bufsoft->blksz;
CHN_UNLOCK(chn);
} else {
*arg_i = 0;
@@ -1224,8 +1283,8 @@ dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode,
if (rdch) {
CHN_LOCK(rdch);
ret = chn_setblocksize(rdch, maxfrags, fragsz);
- r_maxfrags = sndbuf_getblkcnt(rdch->bufsoft);
- r_fragsz = sndbuf_getblksz(rdch->bufsoft);
+ r_maxfrags = rdch->bufsoft->blkcnt;
+ r_fragsz = rdch->bufsoft->blksz;
CHN_UNLOCK(rdch);
} else {
r_maxfrags = maxfrags;
@@ -1234,8 +1293,8 @@ dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode,
if (wrch && ret == 0) {
CHN_LOCK(wrch);
ret = chn_setblocksize(wrch, maxfrags, fragsz);
- maxfrags = sndbuf_getblkcnt(wrch->bufsoft);
- fragsz = sndbuf_getblksz(wrch->bufsoft);
+ maxfrags = wrch->bufsoft->blkcnt;
+ fragsz = wrch->bufsoft->blksz;
CHN_UNLOCK(wrch);
} else { /* use whatever came from the read channel */
maxfrags = r_maxfrags;
@@ -1261,9 +1320,9 @@ dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode,
CHN_LOCK(rdch);
a->bytes = sndbuf_getready(bs);
- a->fragments = a->bytes / sndbuf_getblksz(bs);
- a->fragstotal = sndbuf_getblkcnt(bs);
- a->fragsize = sndbuf_getblksz(bs);
+ a->fragments = a->bytes / bs->blksz;
+ a->fragstotal = bs->blkcnt;
+ a->fragsize = bs->blksz;
CHN_UNLOCK(rdch);
} else
ret = EINVAL;
@@ -1279,9 +1338,9 @@ dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode,
CHN_LOCK(wrch);
a->bytes = sndbuf_getfree(bs);
- a->fragments = a->bytes / sndbuf_getblksz(bs);
- a->fragstotal = sndbuf_getblkcnt(bs);
- a->fragsize = sndbuf_getblksz(bs);
+ a->fragments = a->bytes / bs->blksz;
+ a->fragstotal = bs->blkcnt;
+ a->fragsize = bs->blksz;
CHN_UNLOCK(wrch);
} else
ret = EINVAL;
@@ -1295,7 +1354,7 @@ dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode,
struct snd_dbuf *bs = rdch->bufsoft;
CHN_LOCK(rdch);
- a->bytes = sndbuf_gettotal(bs);
+ a->bytes = bs->total;
a->blocks = sndbuf_getblocks(bs) - rdch->blocks;
a->ptr = sndbuf_getfreeptr(bs);
rdch->blocks = sndbuf_getblocks(bs);
@@ -1312,7 +1371,7 @@ dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode,
struct snd_dbuf *bs = wrch->bufsoft;
CHN_LOCK(wrch);
- a->bytes = sndbuf_gettotal(bs);
+ a->bytes = bs->total;
a->blocks = sndbuf_getblocks(bs) - wrch->blocks;
a->ptr = sndbuf_getreadyptr(bs);
wrch->blocks = sndbuf_getblocks(bs);
@@ -1538,7 +1597,7 @@ dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode,
struct snd_dbuf *bs;
CHN_LOCK(wrch);
while (wrch->inprog != 0)
- cv_wait(&wrch->cv, wrch->lock);
+ cv_wait(&wrch->cv, &wrch->lock);
bs = wrch->bufsoft;
if ((bs->shadbuf != NULL) && (sndbuf_getready(bs) > 0)) {
bs->sl = sndbuf_getready(bs);
@@ -1562,7 +1621,7 @@ dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode,
struct snd_dbuf *bs;
CHN_LOCK(wrch);
while (wrch->inprog != 0)
- cv_wait(&wrch->cv, wrch->lock);
+ cv_wait(&wrch->cv, &wrch->lock);
bs = wrch->bufsoft;
if ((bs->shadbuf != NULL) && (bs->sl > 0)) {
sndbuf_softreset(bs);
@@ -1599,8 +1658,8 @@ dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode,
CHN_LOCK(chn);
bs = chn->bufsoft;
- oc->samples = sndbuf_gettotal(bs) / sndbuf_getalign(bs);
- oc->fifo_samples = sndbuf_getready(bs) / sndbuf_getalign(bs);
+ oc->samples = bs->total / bs->align;
+ oc->fifo_samples = sndbuf_getready(bs) / bs->align;
CHN_UNLOCK(chn);
}
break;
@@ -1635,6 +1694,9 @@ dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode,
break;
case SNDCTL_DSP_GETERROR:
+#ifdef COMPAT_FREEBSD32
+ case SNDCTL_DSP_GETERROR32:
+#endif
/*
* OSSv4 docs: "All errors and counters will automatically be
* cleared to zeroes after the call so each call will return only
@@ -1644,6 +1706,14 @@ dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode,
*/
{
audio_errinfo *ei = (audio_errinfo *)arg;
+#ifdef COMPAT_FREEBSD32
+ audio_errinfo errinfo;
+ audio_errinfo32 *ei32 = (audio_errinfo32 *)arg;
+
+ if (cmd == SNDCTL_DSP_GETERROR32) {
+ ei = &errinfo;
+ }
+#endif
bzero((void *)ei, sizeof(*ei));
@@ -1659,6 +1729,21 @@ dsp_ioctl(struct cdev *i_dev, u_long cmd, caddr_t arg, int mode,
rdch->xruns = 0;
CHN_UNLOCK(rdch);
}
+#ifdef COMPAT_FREEBSD32
+ if (cmd == SNDCTL_DSP_GETERROR32) {
+ bzero((void *)ei32, sizeof(*ei32));
+ ei32->play_underruns = ei->play_underruns;
+ ei32->rec_overruns = ei->rec_overruns;
+ ei32->play_ptradjust = ei->play_ptradjust;
+ ei32->rec_ptradjust = ei->rec_ptradjust;
+ ei32->play_errorcount = ei->play_errorcount;
+ ei32->rec_errorcount = ei->rec_errorcount;
+ ei32->play_lasterror = ei->play_lasterror;
+ ei32->rec_lasterror = ei->rec_lasterror;
+ ei32->play_errorparm = ei->play_errorparm;
+ ei32->rec_errorparm = ei->rec_errorparm;
+ }
+#endif
}
break;
@@ -1875,7 +1960,7 @@ dsp_mmap_single(struct cdev *i_dev, vm_ooffset_t *offset,
c = ((nprot & PROT_WRITE) != 0) ? wrch : rdch;
if (c == NULL || (c->flags & CHN_F_MMAP_INVALID) ||
- (*offset + size) > sndbuf_getallocsize(c->bufsoft) ||
+ (*offset + size) > c->bufsoft->allocsize ||
(wrch != NULL && (wrch->flags & CHN_F_MMAP_INVALID)) ||
(rdch != NULL && (rdch->flags & CHN_F_MMAP_INVALID))) {
dsp_unlock_chans(priv, FREAD | FWRITE);
@@ -2845,6 +2930,86 @@ dsp_oss_getchannelmask(struct pcm_channel *wrch, struct pcm_channel *rdch,
return (ret);
}
+static void
+dsp_kqdetach(struct knote *kn)
+{
+ struct pcm_channel *ch = kn->kn_hook;
+
+ if (ch == NULL)
+ return;
+ CHN_LOCK(ch);
+ knlist_remove(&ch->bufsoft->sel.si_note, kn, 1);
+ CHN_UNLOCK(ch);
+}
+
+static int
+dsp_kqevent(struct knote *kn, long hint)
+{
+ struct pcm_channel *ch = kn->kn_hook;
+
+ CHN_LOCKASSERT(ch);
+ if (ch->flags & CHN_F_DEAD) {
+ kn->kn_flags |= EV_EOF;
+ return (1);
+ }
+ kn->kn_data = 0;
+ if (chn_polltrigger(ch)) {
+ if (kn->kn_filter == EVFILT_READ)
+ kn->kn_data = sndbuf_getready(ch->bufsoft);
+ else
+ kn->kn_data = sndbuf_getfree(ch->bufsoft);
+ }
+
+ return (kn->kn_data > 0);
+}
+
+static const struct filterops dsp_filtops = {
+ .f_isfd = 1,
+ .f_detach = dsp_kqdetach,
+ .f_event = dsp_kqevent,
+};
+
+static int
+dsp_kqfilter(struct cdev *dev, struct knote *kn)
+{
+ struct dsp_cdevpriv *priv;
+ struct snddev_info *d;
+ struct pcm_channel *ch;
+ int err = 0;
+
+ if ((err = devfs_get_cdevpriv((void **)&priv)) != 0)
+ return (err);
+
+ d = priv->sc;
+ if (!DSP_REGISTERED(d))
+ return (EBADF);
+ PCM_GIANT_ENTER(d);
+ switch (kn->kn_filter) {
+ case EVFILT_READ:
+ ch = priv->rdch;
+ break;
+ case EVFILT_WRITE:
+ ch = priv->wrch;
+ break;
+ default:
+ kn->kn_hook = NULL;
+ err = EINVAL;
+ ch = NULL;
+ break;
+ }
+ if (ch != NULL) {
+ kn->kn_fop = &dsp_filtops;
+ CHN_LOCK(ch);
+ knlist_add(&ch->bufsoft->sel.si_note, kn, 1);
+ CHN_UNLOCK(ch);
+ kn->kn_hook = ch;
+ } else
+ err = EINVAL;
+ PCM_GIANT_LEAVE(d);
+
+ return (err);
+}
+
#ifdef OSSV4_EXPERIMENT
/**
* @brief Retrieve an audio device's label
generated by cgit v1.2.3 (git 2.25.1) at 2025-11-23 09:45:49 +0000