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9c271f79d6
freebsd-skq/sys/dev/sound/pcm/sound.c
Ariff Abdullah 9c271f79d6 Insert NULL pointer checking around devclass_get_maxunit(pcm_devclass, ..) . 
Things can get ugly without it due to uninitialized class. RELENG_6 need
a simmilar, but different treatment as well.

err.. perhaps we should teach devclass_get_maxunit() to return -1 ?

MFC after:	1 day
2007-06-03 10:56:22 +00:00

1438 lines
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/*-
* Copyright (c) 1999 Cameron Grant <cg@freebsd.org>
* (C) 1997 Luigi Rizzo
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*/
#include <dev/sound/pcm/sound.h>
#include <dev/sound/pcm/ac97.h>
#include <dev/sound/pcm/vchan.h>
#include <dev/sound/pcm/dsp.h>
#include <dev/sound/version.h>
#include <sys/limits.h>
#include <sys/sysctl.h>
#include "feeder_if.h"
SND_DECLARE_FILE("$FreeBSD$");
devclass_t pcm_devclass;
int pcm_veto_load = 1;
#ifdef USING_DEVFS
int snd_unit = 0;
TUNABLE_INT("hw.snd.default_unit", &snd_unit);
#endif
int snd_maxautovchans = 16;
/* XXX: a tunable implies that we may need more than one sound channel before
the system can change a sysctl (/etc/sysctl.conf), do we really need
this? */
TUNABLE_INT("hw.snd.maxautovchans", &snd_maxautovchans);
SYSCTL_NODE(_hw, OID_AUTO, snd, CTLFLAG_RD, 0, "Sound driver");
/*
* XXX I've had enough with people not telling proper version/arch
* while reporting problems, not after 387397913213th questions/requests.
*/
static const char snd_driver_version[] =
__XSTRING(SND_DRV_VERSION)"/"MACHINE_ARCH;
SYSCTL_STRING(_hw_snd, OID_AUTO, version, CTLFLAG_RD, &snd_driver_version,
0, "Driver version/arch");
/**
* @brief Unit number allocator for syncgroup IDs
*/
struct unrhdr *pcmsg_unrhdr = NULL;
static int sndstat_prepare_pcm(struct sbuf *s, device_t dev, int verbose);
void *
snd_mtxcreate(const char *desc, const char *type)
{
#ifdef USING_MUTEX
struct mtx *m;
m = malloc(sizeof(*m), M_DEVBUF, M_WAITOK | M_ZERO);
mtx_init(m, desc, type, MTX_DEF);
return m;
#else
return (void *)0xcafebabe;
#endif
}
void
snd_mtxfree(void *m)
{
#ifdef USING_MUTEX
struct mtx *mtx = m;
/* mtx_assert(mtx, MA_OWNED); */
mtx_destroy(mtx);
free(mtx, M_DEVBUF);
#endif
}
void
snd_mtxassert(void *m)
{
#ifdef USING_MUTEX
#ifdef INVARIANTS
struct mtx *mtx = m;
mtx_assert(mtx, MA_OWNED);
#endif
#endif
}
/*
void
snd_mtxlock(void *m)
{
#ifdef USING_MUTEX
struct mtx *mtx = m;
mtx_lock(mtx);
#endif
}
void
snd_mtxunlock(void *m)
{
#ifdef USING_MUTEX
struct mtx *mtx = m;
mtx_unlock(mtx);
#endif
}
*/
int
snd_setup_intr(device_t dev, struct resource *res, int flags, driver_intr_t hand, void *param, void **cookiep)
{
#ifdef USING_MUTEX
flags &= INTR_MPSAFE;
flags |= INTR_TYPE_AV;
#else
flags = INTR_TYPE_AV;
#endif
return bus_setup_intr(dev, res, flags,
#if __FreeBSD_version >= 700031
NULL,
#endif
hand, param, cookiep);
}
#ifndef PCM_DEBUG_MTX
void
pcm_lock(struct snddev_info *d)
{
snd_mtxlock(d->lock);
}
void
pcm_unlock(struct snddev_info *d)
{
snd_mtxunlock(d->lock);
}
#endif
struct pcm_channel *
pcm_getfakechan(struct snddev_info *d)
{
return d->fakechan;
}
static void
pcm_clonereset(struct snddev_info *d)
{
int cmax;
snd_mtxassert(d->lock);
cmax = d->playcount + d->reccount - 1;
if (d->pvchancount > 0)
cmax += MAX(d->pvchancount, snd_maxautovchans) - 1;
if (d->rvchancount > 0)
cmax += MAX(d->rvchancount, snd_maxautovchans) - 1;
if (cmax > PCMMAXCLONE)
cmax = PCMMAXCLONE;
(void)snd_clone_gc(d->clones);
(void)snd_clone_setmaxunit(d->clones, cmax);
}
static int
pcm_setvchans(struct snddev_info *d, int direction, int newcnt, int num)
{
struct pcm_channel *c, *ch, *nch;
int err, vcnt;
err = 0;
pcm_inprog(d, 1);
if ((direction == PCMDIR_PLAY && d->playcount < 1) ||
(direction == PCMDIR_REC && d->reccount < 1)) {
err = ENODEV;
goto pcm_setvchans_out;
}
if (!(d->flags & SD_F_AUTOVCHAN)) {
err = EINVAL;
goto pcm_setvchans_out;
}
if (newcnt < 0 || newcnt > SND_MAXVCHANS) {
err = E2BIG;
goto pcm_setvchans_out;
}
if (direction == PCMDIR_PLAY)
vcnt = d->pvchancount;
else if (direction == PCMDIR_REC)
vcnt = d->rvchancount;
else {
err = EINVAL;
goto pcm_setvchans_out;
}
if (newcnt > vcnt) {
KASSERT(num == -1 ||
(num >= 0 && num < SND_MAXVCHANS && (newcnt - 1) == vcnt),
("bogus vchan_create() request num=%d newcnt=%d vcnt=%d",
num, newcnt, vcnt));
/* add new vchans - find a parent channel first */
CHN_FOREACH(c, d, channels.pcm) {
CHN_LOCK(c);
if (c->direction == direction &&
((c->flags & CHN_F_HAS_VCHAN) || (vcnt == 0 &&
!(c->flags & (CHN_F_BUSY | CHN_F_VIRTUAL)))))
goto pcm_setvchans_addok;
CHN_UNLOCK(c);
}
err = EBUSY;
goto pcm_setvchans_out;
pcm_setvchans_addok:
c->flags |= CHN_F_BUSY;
while (err == 0 && newcnt > vcnt) {
err = vchan_create(c, num);
if (err == 0)
vcnt++;
else if (err == E2BIG && newcnt > vcnt)
device_printf(d->dev,
"%s: err=%d Maximum channel reached.\n",
__func__, err);
}
if (vcnt == 0)
c->flags &= ~CHN_F_BUSY;
CHN_UNLOCK(c);
pcm_lock(d);
pcm_clonereset(d);
pcm_unlock(d);
} else if (newcnt < vcnt) {
KASSERT(num == -1,
("bogus vchan_destroy() request num=%d", num));
CHN_FOREACH(c, d, channels.pcm) {
CHN_LOCK(c);
if (c->direction != direction ||
CHN_EMPTY(c, children) ||
!(c->flags & CHN_F_HAS_VCHAN)) {
CHN_UNLOCK(c);
continue;
}
CHN_FOREACH_SAFE(ch, c, nch, children) {
CHN_LOCK(ch);
if (!(ch->flags & CHN_F_BUSY)) {
CHN_UNLOCK(ch);
CHN_UNLOCK(c);
err = vchan_destroy(ch);
CHN_LOCK(c);
if (err == 0)
vcnt--;
} else
CHN_UNLOCK(ch);
if (vcnt == newcnt) {
err = 0;
break;
}
}
CHN_UNLOCK(c);
break;
}
pcm_lock(d);
pcm_clonereset(d);
pcm_unlock(d);
}
pcm_setvchans_out:
pcm_inprog(d, -1);
return err;
}
/* return error status and a locked channel */
int
pcm_chnalloc(struct snddev_info *d, struct pcm_channel **ch, int direction,
pid_t pid, int devunit)
{
struct pcm_channel *c;
int err, vchancount;
KASSERT(d != NULL && ch != NULL && (devunit == -1 ||
!(devunit & ~(SND_U_MASK | SND_D_MASK | SND_C_MASK))) &&
(direction == PCMDIR_PLAY || direction == PCMDIR_REC),
("%s() invalid d=%p ch=%p direction=%d pid=%d devunit=%d",
__func__, d, ch, direction, pid, devunit));
/* Double check again. */
if (devunit != -1) {
switch (snd_unit2d(devunit)) {
case SND_DEV_DSPHW_PLAY:
case SND_DEV_DSPHW_VPLAY:
if (direction != PCMDIR_PLAY)
return (EOPNOTSUPP);
break;
case SND_DEV_DSPHW_REC:
case SND_DEV_DSPHW_VREC:
if (direction != PCMDIR_REC)
return (EOPNOTSUPP);
break;
default:
if (!(direction == PCMDIR_PLAY ||
direction == PCMDIR_REC))
return (EOPNOTSUPP);
break;
}
}
retry_chnalloc:
err = ENODEV;
/* scan for a free channel */
CHN_FOREACH(c, d, channels.pcm) {
CHN_LOCK(c);
if (c->direction == direction && !(c->flags & CHN_F_BUSY) &&
(devunit == -1 || devunit == -2 || c->unit == devunit)) {
c->flags |= CHN_F_BUSY;
c->pid = pid;
*ch = c;
return (0);
} else if (c->unit == devunit) {
if (c->direction != direction)
err = EOPNOTSUPP;
else if (c->flags & CHN_F_BUSY)
err = EBUSY;
else
err = EINVAL;
CHN_UNLOCK(c);
return (err);
} else if ((devunit == -1 || devunit == -2) &&
c->direction == direction && (c->flags & CHN_F_BUSY))
err = EBUSY;
CHN_UNLOCK(c);
}
/* no channel available */
if (devunit == -1 || (devunit != -2 &&
(snd_unit2d(devunit) == SND_DEV_DSPHW_VPLAY ||
snd_unit2d(devunit) == SND_DEV_DSPHW_VREC))) {
if (direction == PCMDIR_PLAY)
vchancount = d->pvchancount;
else
vchancount = d->rvchancount;
if (!(vchancount > 0 && vchancount < snd_maxautovchans) &&
(devunit == -1 || snd_unit2c(devunit) < snd_maxautovchans))
return (err);
err = pcm_setvchans(d, direction, vchancount + 1,
(devunit == -1) ? -1 : snd_unit2c(devunit));
if (err == 0) {
if (devunit == -1)
devunit = -2;
goto retry_chnalloc;
}
}
return (err);
}
/* release a locked channel and unlock it */
int
pcm_chnrelease(struct pcm_channel *c)
{
CHN_LOCKASSERT(c);
c->flags &= ~CHN_F_BUSY;
c->pid = -1;
CHN_UNLOCK(c);
return 0;
}
int
pcm_chnref(struct pcm_channel *c, int ref)
{
int r;
CHN_LOCKASSERT(c);
c->refcount += ref;
r = c->refcount;
return r;
}
int
pcm_inprog(struct snddev_info *d, int delta)
{
int r;
if (delta == 0)
return d->inprog;
/* backtrace(); */
pcm_lock(d);
d->inprog += delta;
r = d->inprog;
pcm_unlock(d);
return r;
}
static void
pcm_setmaxautovchans(struct snddev_info *d, int num)
{
if (num < 0)
return;
if (num >= 0 && d->pvchancount > num)
(void)pcm_setvchans(d, PCMDIR_PLAY, num, -1);
else if (num > 0 && d->pvchancount == 0)
(void)pcm_setvchans(d, PCMDIR_PLAY, 1, -1);
if (num >= 0 && d->rvchancount > num)
(void)pcm_setvchans(d, PCMDIR_REC, num, -1);
else if (num > 0 && d->rvchancount == 0)
(void)pcm_setvchans(d, PCMDIR_REC, 1, -1);
pcm_lock(d);
pcm_clonereset(d);
pcm_unlock(d);
}
#ifdef USING_DEVFS
static int
sysctl_hw_snd_default_unit(SYSCTL_HANDLER_ARGS)
{
struct snddev_info *d;
int error, unit;
unit = snd_unit;
error = sysctl_handle_int(oidp, &unit, sizeof(unit), req);
if (error == 0 && req->newptr != NULL) {
d = devclass_get_softc(pcm_devclass, unit);
if (d == NULL || CHN_EMPTY(d, channels.pcm))
return EINVAL;
snd_unit = unit;
}
return (error);
}
/* XXX: do we need a way to let the user change the default unit? */
SYSCTL_PROC(_hw_snd, OID_AUTO, default_unit, CTLTYPE_INT | CTLFLAG_RW,
0, sizeof(int), sysctl_hw_snd_default_unit, "I", "default sound device");
#endif
static int
sysctl_hw_snd_maxautovchans(SYSCTL_HANDLER_ARGS)
{
struct snddev_info *d;
int i, v, error;
v = snd_maxautovchans;
error = sysctl_handle_int(oidp, &v, sizeof(v), req);
if (error == 0 && req->newptr != NULL) {
if (v < 0)
v = 0;
if (v > SND_MAXVCHANS)
v = SND_MAXVCHANS;
snd_maxautovchans = v;
for (i = 0; pcm_devclass != NULL &&
i < devclass_get_maxunit(pcm_devclass); i++) {
d = devclass_get_softc(pcm_devclass, i);
if (d == NULL)
continue;
pcm_setmaxautovchans(d, v);
}
}
return (error);
}
SYSCTL_PROC(_hw_snd, OID_AUTO, maxautovchans, CTLTYPE_INT | CTLFLAG_RW,
0, sizeof(int), sysctl_hw_snd_maxautovchans, "I", "maximum virtual channel");
struct pcm_channel *
pcm_chn_create(struct snddev_info *d, struct pcm_channel *parent, kobj_class_t cls, int dir, int num, void *devinfo)
{
struct pcm_channel *ch;
int direction, err, rpnum, *pnum, max;
int udc, device, chan;
char *dirs, *devname, buf[CHN_NAMELEN];
KASSERT(num >= -1, ("invalid num=%d", num));
pcm_lock(d);
switch(dir) {
case PCMDIR_PLAY:
dirs = "play";
direction = PCMDIR_PLAY;
pnum = &d->playcount;
device = SND_DEV_DSPHW_PLAY;
max = SND_MAXHWCHAN;
break;
case PCMDIR_PLAY_VIRTUAL:
dirs = "virtual";
direction = PCMDIR_PLAY;
pnum = &d->pvchancount;
device = SND_DEV_DSPHW_VPLAY;
max = SND_MAXVCHANS;
break;
case PCMDIR_REC:
dirs = "record";
direction = PCMDIR_REC;
pnum = &d->reccount;
device = SND_DEV_DSPHW_REC;
max = SND_MAXHWCHAN;
break;
case PCMDIR_REC_VIRTUAL:
dirs = "virtual";
direction = PCMDIR_REC;
pnum = &d->rvchancount;
device = SND_DEV_DSPHW_VREC;
max = SND_MAXVCHANS;
break;
default:
pcm_unlock(d);
return NULL;
}
chan = (num == -1) ? 0 : num;
if (*pnum >= max || chan >= max) {
pcm_unlock(d);
return NULL;
}
rpnum = 0;
CHN_FOREACH(ch, d, channels.pcm) {
if (CHN_DEV(ch) != device)
continue;
if (chan == CHN_CHAN(ch)) {
if (num != -1) {
device_printf(d->dev,
"channel num=%d allocated!\n", chan);
pcm_unlock(d);
return NULL;
}
chan++;
if (chan >= max) {
device_printf(d->dev,
"chan=%d > %d\n", chan, max);
pcm_unlock(d);
return NULL;
}
}
rpnum++;
}
if (*pnum != rpnum) {
device_printf(d->dev,
"%s(): WARNING: pnum screwed : dirs=%s pnum=%d rpnum=%d\n",
__func__, dirs, *pnum, rpnum);
pcm_unlock(d);
return NULL;
}
udc = snd_mkunit(device_get_unit(d->dev), device, chan);
devname = dsp_unit2name(buf, sizeof(buf), udc);
if (devname == NULL) {
device_printf(d->dev,
"Failed to query device name udc=0x%08x\n", udc);
pcm_unlock(d);
return NULL;
}
(*pnum)++;
pcm_unlock(d);
ch = malloc(sizeof(*ch), M_DEVBUF, M_WAITOK | M_ZERO);
ch->methods = kobj_create(cls, M_DEVBUF, M_WAITOK | M_ZERO);
ch->unit = udc;
ch->pid = -1;
ch->parentsnddev = d;
ch->parentchannel = parent;
ch->dev = d->dev;
ch->trigger = PCMTRIG_STOP;
snprintf(ch->name, sizeof(ch->name), "%s:%s:%s",
device_get_nameunit(ch->dev), dirs, devname);
err = chn_init(ch, devinfo, dir, direction);
if (err) {
device_printf(d->dev, "chn_init(%s) failed: err = %d\n",
ch->name, err);
kobj_delete(ch->methods, M_DEVBUF);
free(ch, M_DEVBUF);
pcm_lock(d);
(*pnum)--;
pcm_unlock(d);
return NULL;
}
return ch;
}
int
pcm_chn_destroy(struct pcm_channel *ch)
{
struct snddev_info *d;
int err;
d = ch->parentsnddev;
err = chn_kill(ch);
if (err) {
device_printf(d->dev, "chn_kill(%s) failed, err = %d\n", ch->name, err);
return err;
}
kobj_delete(ch->methods, M_DEVBUF);
free(ch, M_DEVBUF);
return 0;
}
int
pcm_chn_add(struct snddev_info *d, struct pcm_channel *ch)
{
struct pcm_channel *tmp, *after;
int num;
pcm_lock(d);
KASSERT(ch != NULL && (ch->direction == PCMDIR_PLAY ||
ch->direction == PCMDIR_REC), ("Invalid pcm channel"));
after = NULL;
tmp = NULL;
num = 0;
/*
* Look for possible device collision.
*/
CHN_FOREACH(tmp, d, channels.pcm) {
if (tmp->unit == ch->unit) {
device_printf(d->dev, "%s(): Device collision "
"old=%p new=%p devunit=0x%08x\n",
__func__, tmp, ch, ch->unit);
pcm_unlock(d);
return ENODEV;
}
if (CHN_DEV(tmp) < CHN_DEV(ch)) {
if (num == 0)
after = tmp;
continue;
} else if (CHN_DEV(tmp) > CHN_DEV(ch))
break;
num++;
if (CHN_CHAN(tmp) < CHN_CHAN(ch))
after = tmp;
else if (CHN_CHAN(tmp) > CHN_CHAN(ch))
break;
}
if (after != NULL) {
CHN_INSERT_AFTER(after, ch, channels.pcm);
} else {
CHN_INSERT_HEAD(d, ch, channels.pcm);
}
d->devcount++;
pcm_unlock(d);
return 0;
}
int
pcm_chn_remove(struct snddev_info *d, struct pcm_channel *ch)
{
struct pcm_channel *tmp;
tmp = NULL;
CHN_FOREACH(tmp, d, channels.pcm) {
if (tmp == ch)
break;
}
if (tmp != ch)
return EINVAL;
CHN_REMOVE(d, ch, channels.pcm);
switch (CHN_DEV(ch)) {
case SND_DEV_DSPHW_PLAY:
d->playcount--;
break;
case SND_DEV_DSPHW_VPLAY:
d->pvchancount--;
break;
case SND_DEV_DSPHW_REC:
d->reccount--;
break;
case SND_DEV_DSPHW_VREC:
d->rvchancount--;
break;
default:
break;
}
return 0;
}
int
pcm_addchan(device_t dev, int dir, kobj_class_t cls, void *devinfo)
{
struct snddev_info *d = device_get_softc(dev);
struct pcm_channel *ch;
int err;
ch = pcm_chn_create(d, NULL, cls, dir, -1, devinfo);
if (!ch) {
device_printf(d->dev, "pcm_chn_create(%s, %d, %p) failed\n", cls->name, dir, devinfo);
return ENODEV;
}
err = pcm_chn_add(d, ch);
if (err) {
device_printf(d->dev, "pcm_chn_add(%s) failed, err=%d\n", ch->name, err);
pcm_chn_destroy(ch);
return err;
}
return err;
}
static int
pcm_killchan(device_t dev)
{
struct snddev_info *d = device_get_softc(dev);
struct pcm_channel *ch;
int error = 0;
ch = CHN_FIRST(d, channels.pcm);
error = pcm_chn_remove(d, ch);
if (error)
return (error);
return (pcm_chn_destroy(ch));
}
int
pcm_setstatus(device_t dev, char *str)
{
struct snddev_info *d = device_get_softc(dev);
pcm_setmaxautovchans(d, snd_maxautovchans);
pcm_lock(d);
strlcpy(d->status, str, SND_STATUSLEN);
/* Last stage, enable cloning. */
if (d->clones != NULL) {
(void)snd_clone_enable(d->clones);
}
pcm_unlock(d);
return 0;
}
uint32_t
pcm_getflags(device_t dev)
{
struct snddev_info *d = device_get_softc(dev);
return d->flags;
}
void
pcm_setflags(device_t dev, uint32_t val)
{
struct snddev_info *d = device_get_softc(dev);
d->flags = val;
}
void *
pcm_getdevinfo(device_t dev)
{
struct snddev_info *d = device_get_softc(dev);
return d->devinfo;
}
unsigned int
pcm_getbuffersize(device_t dev, unsigned int minbufsz, unsigned int deflt, unsigned int maxbufsz)
{
struct snddev_info *d = device_get_softc(dev);
int sz, x;
sz = 0;
if (resource_int_value(device_get_name(dev), device_get_unit(dev), "buffersize", &sz) == 0) {
x = sz;
RANGE(sz, minbufsz, maxbufsz);
if (x != sz)
device_printf(dev, "'buffersize=%d' hint is out of range (%d-%d), using %d\n", x, minbufsz, maxbufsz, sz);
x = minbufsz;
while (x < sz)
x <<= 1;
if (x > sz)
x >>= 1;
if (x != sz) {
device_printf(dev, "'buffersize=%d' hint is not a power of 2, using %d\n", sz, x);
sz = x;
}
} else {
sz = deflt;
}
d->bufsz = sz;
return sz;
}
#if defined(SND_DYNSYSCTL) && defined(SND_DEBUG)
static int
sysctl_dev_pcm_clone_flags(SYSCTL_HANDLER_ARGS)
{
struct snddev_info *d;
uint32_t flags;
int err;
d = oidp->oid_arg1;
if (d == NULL || d->clones == NULL)
return (ENODEV);
pcm_lock(d);
flags = snd_clone_getflags(d->clones);
pcm_unlock(d);
err = sysctl_handle_int(oidp, (int *)(&flags), sizeof(flags), req);
if (err == 0 && req->newptr != NULL) {
if ((flags & ~SND_CLONE_MASK))
err = EINVAL;
else {
pcm_lock(d);
(void)snd_clone_setflags(d->clones, flags);
pcm_unlock(d);
}
}
return (err);
}
static int
sysctl_dev_pcm_clone_deadline(SYSCTL_HANDLER_ARGS)
{
struct snddev_info *d;
int err, deadline;
d = oidp->oid_arg1;
if (d == NULL || d->clones == NULL)
return (ENODEV);
pcm_lock(d);
deadline = snd_clone_getdeadline(d->clones);
pcm_unlock(d);
err = sysctl_handle_int(oidp, &deadline, sizeof(deadline), req);
if (err == 0 && req->newptr != NULL) {
if (deadline < 0)
err = EINVAL;
else {
pcm_lock(d);
(void)snd_clone_setdeadline(d->clones, deadline);
pcm_unlock(d);
}
}
return (err);
}
static int
sysctl_dev_pcm_clone_gc(SYSCTL_HANDLER_ARGS)
{
struct snddev_info *d;
int err, val;
d = oidp->oid_arg1;
if (d == NULL || d->clones == NULL)
return (ENODEV);
val = 0;
err = sysctl_handle_int(oidp, &val, sizeof(val), req);
if (err == 0 && req->newptr != NULL && val != 0) {
pcm_lock(d);
(void)snd_clone_gc(d->clones);
pcm_unlock(d);
}
return (err);
}
static int
sysctl_hw_snd_clone_gc(SYSCTL_HANDLER_ARGS)
{
struct snddev_info *d;
int i, err, val;
val = 0;
err = sysctl_handle_int(oidp, &val, sizeof(val), req);
if (err == 0 && req->newptr != NULL && val != 0) {
for (i = 0; pcm_devclass != NULL &&
i < devclass_get_maxunit(pcm_devclass); i++) {
d = devclass_get_softc(pcm_devclass, i);
if (d == NULL || d->clones == NULL)
continue;
pcm_lock(d);
(void)snd_clone_gc(d->clones);
pcm_unlock(d);
}
}
return (err);
}
SYSCTL_PROC(_hw_snd, OID_AUTO, clone_gc, CTLTYPE_INT | CTLFLAG_RW,
0, sizeof(int), sysctl_hw_snd_clone_gc, "I",
"global clone garbage collector");
#endif
int
pcm_register(device_t dev, void *devinfo, int numplay, int numrec)
{
struct snddev_info *d;
if (pcm_veto_load) {
device_printf(dev, "disabled due to an error while initialising: %d\n", pcm_veto_load);
return EINVAL;
}
if (device_get_unit(dev) > PCMMAXUNIT) {
device_printf(dev, "PCMMAXUNIT reached : unit=%d > %d\n",
device_get_unit(dev), PCMMAXUNIT);
device_printf(dev,
"Use 'hw.snd.maxunit' tunable to raise the limit.\n");
return ENODEV;
}
d = device_get_softc(dev);
d->lock = snd_mtxcreate(device_get_nameunit(dev), "sound cdev");
#if 0
/*
* d->flags should be cleared by the allocator of the softc.
* We cannot clear this field here because several devices set
* this flag before calling pcm_register().
*/
d->flags = 0;
#endif
d->dev = dev;
d->devinfo = devinfo;
d->devcount = 0;
d->reccount = 0;
d->playcount = 0;
d->pvchancount = 0;
d->rvchancount = 0;
d->pvchanrate = 0;
d->pvchanformat = 0;
d->rvchanrate = 0;
d->rvchanformat = 0;
d->inprog = 0;
/*
* Create clone manager, disabled by default. Cloning will be
* enabled during final stage of driver iniialization through
* pcm_setstatus().
*/
d->clones = snd_clone_create(
#ifdef SND_DIAGNOSTIC
d->lock,
#endif
SND_U_MASK | SND_D_MASK, PCMMAXCLONE, SND_CLONE_DEADLINE_DEFAULT,
SND_CLONE_GC_ENABLE | SND_CLONE_GC_UNREF |
SND_CLONE_GC_LASTREF | SND_CLONE_GC_EXPIRED);
if (bootverbose != 0 || snd_verbose > 3) {
pcm_lock(d);
device_printf(dev,
"clone manager: deadline=%dms flags=0x%08x\n",
snd_clone_getdeadline(d->clones),
snd_clone_getflags(d->clones));
pcm_unlock(d);
}
CHN_INIT(d, channels.pcm);
CHN_INIT(d, channels.pcm.busy);
if ((numplay == 0 || numrec == 0) && numplay != numrec)
d->flags |= SD_F_SIMPLEX;
d->fakechan = fkchan_setup(dev);
chn_init(d->fakechan, NULL, 0, 0);
#ifdef SND_DYNSYSCTL
sysctl_ctx_init(&d->play_sysctl_ctx);
d->play_sysctl_tree = SYSCTL_ADD_NODE(&d->play_sysctl_ctx,
SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "play",
CTLFLAG_RD, 0, "playback channels node");
sysctl_ctx_init(&d->rec_sysctl_ctx);
d->rec_sysctl_tree = SYSCTL_ADD_NODE(&d->rec_sysctl_ctx,
SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "rec",
CTLFLAG_RD, 0, "record channels node");
/* XXX: an user should be able to set this with a control tool, the
sysadmin then needs min+max sysctls for this */
SYSCTL_ADD_INT(device_get_sysctl_ctx(dev),
SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
OID_AUTO, "buffersize", CTLFLAG_RD, &d->bufsz, 0, "allocated buffer size");
#ifdef SND_DEBUG
SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
"clone_flags", CTLTYPE_UINT | CTLFLAG_RW, d, sizeof(d),
sysctl_dev_pcm_clone_flags, "IU",
"clone flags");
SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
"clone_deadline", CTLTYPE_INT | CTLFLAG_RW, d, sizeof(d),
sysctl_dev_pcm_clone_deadline, "I",
"clone expiration deadline (ms)");
SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
"clone_gc", CTLTYPE_INT | CTLFLAG_RW, d, sizeof(d),
sysctl_dev_pcm_clone_gc, "I",
"clone garbage collector");
#endif
#endif
if (numplay > 0 || numrec > 0) {
d->flags |= SD_F_AUTOVCHAN;
vchan_initsys(dev);
}
sndstat_register(dev, d->status, sndstat_prepare_pcm);
return 0;
}
int
pcm_unregister(device_t dev)
{
struct snddev_info *d = device_get_softc(dev);
struct pcm_channel *ch;
struct thread *td;
int i;
td = curthread;
if (sndstat_acquire(td) != 0) {
device_printf(dev, "unregister: sndstat busy\n");
return EBUSY;
}
pcm_lock(d);
if (d->inprog) {
device_printf(dev, "unregister: operation in progress\n");
pcm_unlock(d);
sndstat_release(td);
return EBUSY;
}
CHN_FOREACH(ch, d, channels.pcm) {
if (ch->refcount > 0) {
device_printf(dev, "unregister: channel %s busy (pid %d)\n", ch->name, ch->pid);
pcm_unlock(d);
sndstat_release(td);
return EBUSY;
}
}
if (d->clones != NULL) {
if (snd_clone_busy(d->clones) != 0) {
device_printf(dev, "unregister: clone busy\n");
pcm_unlock(d);
sndstat_release(td);
return EBUSY;
} else
(void)snd_clone_disable(d->clones);
}
if (mixer_uninit(dev) == EBUSY) {
device_printf(dev, "unregister: mixer busy\n");
if (d->clones != NULL)
(void)snd_clone_enable(d->clones);
pcm_unlock(d);
sndstat_release(td);
return EBUSY;
}
if (d->clones != NULL) {
snd_clone_destroy(d->clones);
d->clones = NULL;
}
d->devcount = 0;
#ifdef SND_DYNSYSCTL
if (d->play_sysctl_tree != NULL) {
sysctl_ctx_free(&d->play_sysctl_ctx);
d->play_sysctl_tree = NULL;
}
if (d->rec_sysctl_tree != NULL) {
sysctl_ctx_free(&d->rec_sysctl_ctx);
d->rec_sysctl_tree = NULL;
}
#endif
while (!CHN_EMPTY(d, channels.pcm))
pcm_killchan(dev);
chn_kill(d->fakechan);
fkchan_kill(d->fakechan);
pcm_unlock(d);
snd_mtxfree(d->lock);
sndstat_unregister(dev);
sndstat_release(td);
if (snd_unit == device_get_unit(dev)) {
/*
* Reassign default unit to the next available dev.
*/
for (i = 0; pcm_devclass != NULL &&
i < devclass_get_maxunit(pcm_devclass); i++) {
if (device_get_unit(dev) == i ||
devclass_get_softc(pcm_devclass, i) == NULL)
continue;
snd_unit = i;
break;
}
}
return 0;
}
/************************************************************************/
static int
sndstat_prepare_pcm(struct sbuf *s, device_t dev, int verbose)
{
struct snddev_info *d;
struct pcm_channel *c;
struct pcm_feeder *f;
if (verbose < 1)
return 0;
d = device_get_softc(dev);
if (!d)
return ENXIO;
pcm_lock(d);
if (!CHN_EMPTY(d, channels.pcm)) {
sbuf_printf(s, " (%dp:%dv/%dr:%dv channels%s%s)",
d->playcount, d->pvchancount,
d->reccount, d->rvchancount,
(d->flags & SD_F_SIMPLEX)? "" : " duplex",
#ifdef USING_DEVFS
(device_get_unit(dev) == snd_unit)? " default" : ""
#else
""
#endif
);
if (verbose <= 1) {
pcm_unlock(d);
return 0;
}
CHN_FOREACH(c, d, channels.pcm) {
KASSERT(c->bufhard != NULL && c->bufsoft != NULL,
("hosed pcm channel setup"));
sbuf_printf(s, "\n\t");
/* it would be better to indent child channels */
sbuf_printf(s, "%s[%s]: ", c->parentchannel? c->parentchannel->name : "", c->name);
sbuf_printf(s, "spd %d", c->speed);
if (c->speed != sndbuf_getspd(c->bufhard))
sbuf_printf(s, "/%d", sndbuf_getspd(c->bufhard));
sbuf_printf(s, ", fmt 0x%08x", c->format);
if (c->format != sndbuf_getfmt(c->bufhard))
sbuf_printf(s, "/0x%08x", sndbuf_getfmt(c->bufhard));
sbuf_printf(s, ", flags 0x%08x, 0x%08x", c->flags, c->feederflags);
if (c->pid != -1)
sbuf_printf(s, ", pid %d", c->pid);
sbuf_printf(s, "\n\t");
sbuf_printf(s, "interrupts %d, ", c->interrupts);
if (c->direction == PCMDIR_REC)
sbuf_printf(s, "overruns %d, feed %u, hfree %d, sfree %d [b:%d/%d/%d|bs:%d/%d/%d]",
c->xruns, c->feedcount, sndbuf_getfree(c->bufhard), sndbuf_getfree(c->bufsoft),
sndbuf_getsize(c->bufhard), sndbuf_getblksz(c->bufhard),
sndbuf_getblkcnt(c->bufhard),
sndbuf_getsize(c->bufsoft), sndbuf_getblksz(c->bufsoft),
sndbuf_getblkcnt(c->bufsoft));
else
sbuf_printf(s, "underruns %d, feed %u, ready %d [b:%d/%d/%d|bs:%d/%d/%d]",
c->xruns, c->feedcount, sndbuf_getready(c->bufsoft),
sndbuf_getsize(c->bufhard), sndbuf_getblksz(c->bufhard),
sndbuf_getblkcnt(c->bufhard),
sndbuf_getsize(c->bufsoft), sndbuf_getblksz(c->bufsoft),
sndbuf_getblkcnt(c->bufsoft));
sbuf_printf(s, "\n\t");
sbuf_printf(s, "{%s}", (c->direction == PCMDIR_REC)? "hardware" : "userland");
sbuf_printf(s, " -> ");
f = c->feeder;
while (f->source != NULL)
f = f->source;
while (f != NULL) {
sbuf_printf(s, "%s", f->class->name);
if (f->desc->type == FEEDER_FMT)
sbuf_printf(s, "(0x%08x -> 0x%08x)", f->desc->in, f->desc->out);
if (f->desc->type == FEEDER_RATE)
sbuf_printf(s, "(%d -> %d)", FEEDER_GET(f, FEEDRATE_SRC), FEEDER_GET(f, FEEDRATE_DST));
if (f->desc->type == FEEDER_ROOT || f->desc->type == FEEDER_MIXER ||
f->desc->type == FEEDER_VOLUME)
sbuf_printf(s, "(0x%08x)", f->desc->out);
sbuf_printf(s, " -> ");
f = f->parent;
}
sbuf_printf(s, "{%s}", (c->direction == PCMDIR_REC)? "userland" : "hardware");
}
} else
sbuf_printf(s, " (mixer only)");
pcm_unlock(d);
return 0;
}
/************************************************************************/
#ifdef SND_DYNSYSCTL
int
sysctl_hw_snd_vchans(SYSCTL_HANDLER_ARGS)
{
struct snddev_info *d;
int direction, vchancount;
int err, newcnt;
d = devclass_get_softc(pcm_devclass, VCHAN_SYSCTL_UNIT(oidp->oid_arg1));
if (d == NULL)
return EINVAL;
switch (VCHAN_SYSCTL_DIR(oidp->oid_arg1)) {
case VCHAN_PLAY:
if (d->playcount < 1)
return ENODEV;
direction = PCMDIR_PLAY;
vchancount = d->pvchancount;
break;
case VCHAN_REC:
if (d->reccount < 1)
return ENODEV;
direction = PCMDIR_REC;
vchancount = d->rvchancount;
break;
default:
return EINVAL;
break;
}
newcnt = vchancount;
err = sysctl_handle_int(oidp, &newcnt, sizeof(newcnt), req);
if (err == 0 && req->newptr != NULL && vchancount != newcnt) {
if (newcnt < 0)
newcnt = 0;
if (newcnt > SND_MAXVCHANS)
newcnt = SND_MAXVCHANS;
err = pcm_setvchans(d, direction, newcnt, -1);
}
return err;
}
#endif
/************************************************************************/
/**
* @brief Handle OSSv4 SNDCTL_SYSINFO ioctl.
*
* @param si Pointer to oss_sysinfo struct where information about the
* sound subsystem will be written/copied.
*
* This routine returns information about the sound system, such as the
* current OSS version, number of audio, MIDI, and mixer drivers, etc.
* Also includes a bitmask showing which of the above types of devices
* are open (busy).
*
* @note
* Calling threads must not hold any snddev_info or pcm_channel locks.
*
* @author Ryan Beasley <ryanb@FreeBSD.org>
*/
void
sound_oss_sysinfo(oss_sysinfo *si)
{
static char si_product[] = "FreeBSD native OSS ABI";
static char si_version[] = __XSTRING(__FreeBSD_version);
static int intnbits = sizeof(int) * 8; /* Better suited as macro?
Must pester a C guru. */
struct snddev_info *d;
struct pcm_channel *c;
int i, j, ncards;
ncards = 0;
strlcpy(si->product, si_product, sizeof(si->product));
strlcpy(si->version, si_version, sizeof(si->version));
si->versionnum = SOUND_VERSION;
/*
* Iterate over PCM devices and their channels, gathering up data
* for the numaudios, ncards, and openedaudio fields.
*/
si->numaudios = 0;
bzero((void *)&si->openedaudio, sizeof(si->openedaudio));
if (pcm_devclass != NULL) {
j = 0;
for (i = 0; pcm_devclass != NULL &&
i < devclass_get_maxunit(pcm_devclass); i++) {
d = devclass_get_softc(pcm_devclass, i);
if (!d)
continue;
/* See note in function's docblock */
mtx_assert(d->lock, MA_NOTOWNED);
/* Increment device's "operations in progress" */
pcm_inprog(d, 1);
pcm_lock(d);
si->numaudios += d->devcount;
++ncards;
CHN_FOREACH(c, d, channels.pcm) {
mtx_assert(c->lock, MA_NOTOWNED);
CHN_LOCK(c);
if (c->flags & CHN_F_BUSY)
si->openedaudio[j / intnbits] |=
(1 << (j % intnbits));
CHN_UNLOCK(c);
j++;
}
pcm_unlock(d);
pcm_inprog(d, -1);
}
}
si->numsynths = 0; /* OSSv4 docs: this field is obsolete */
/**
* @todo Collect num{midis,timers}.
*
* Need access to sound/midi/midi.c::midistat_lock in order
* to safely touch midi_devices and get a head count of, well,
* MIDI devices. midistat_lock is a global static (i.e., local to
* midi.c), but midi_devices is a regular global; should the mutex
* be publicized, or is there another way to get this information?
*
* NB: MIDI/sequencer stuff is currently on hold.
*/
si->nummidis = 0;
si->numtimers = 0;
si->nummixers = mixer_count;
si->numcards = ncards;
/* OSSv4 docs: Intended only for test apps; API doesn't
really have much of a concept of cards. Shouldn't be
used by applications. */
/**
* @todo Fill in "busy devices" fields.
*
* si->openedmidi = " MIDI devices
*/
bzero((void *)&si->openedmidi, sizeof(si->openedmidi));
/*
* Si->filler is a reserved array, but according to docs each
* element should be set to -1.
*/
for (i = 0; i < sizeof(si->filler)/sizeof(si->filler[0]); i++)
si->filler[i] = -1;
}
/************************************************************************/
static int
sound_modevent(module_t mod, int type, void *data)
{
int ret;
#if 0
return (midi_modevent(mod, type, data));
#else
ret = 0;
switch(type) {
case MOD_LOAD:
pcmsg_unrhdr = new_unrhdr(1, INT_MAX, NULL);
break;
case MOD_UNLOAD:
case MOD_SHUTDOWN:
ret = sndstat_acquire(curthread);
if (ret != 0)
break;
if (pcmsg_unrhdr != NULL) {
delete_unrhdr(pcmsg_unrhdr);
pcmsg_unrhdr = NULL;
}
break;
default:
ret = EOPNOTSUPP;
}
return ret;
#endif
}
DEV_MODULE(sound, sound_modevent, NULL);
MODULE_VERSION(sound, SOUND_MODVER);
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