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freebsd-dev/sys/dev/sound/pcm/sound.c
Alexander Motin 5525b53de5 Do not handle MOD_SHUTDOWN equally to MOD_UNLOAD in sound kernel module. 
MOD_SHUTDOWN is not an end of existence, and there is a life after it.
In particular, code previously called on MOD_SHUTDOWN grabbed lock and
deallocated unit numbering. That caused infinite wait loop if snd_uaudio
tried to destroy its PCM device after that point.

MFC after:	3 days
2012-02-14 09:19:30 +00:00

1438 lines
32 KiB
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/*-
* Copyright (c) 2005-2009 Ariff Abdullah <ariff@FreeBSD.org>
* Portions Copyright (c) Ryan Beasley <ryan.beasley@gmail.com> - GSoC 2006
* Copyright (c) 1999 Cameron Grant <cg@FreeBSD.org>
* Copyright (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.
*/
#ifdef HAVE_KERNEL_OPTION_HEADERS
#include "opt_snd.h"
#endif
#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/pcm/sndstat.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;
int snd_unit = -1;
TUNABLE_INT("hw.snd.default_unit", &snd_unit);
static int snd_unit_auto = -1;
TUNABLE_INT("hw.snd.default_auto", &snd_unit_auto);
SYSCTL_INT(_hw_snd, OID_AUTO, default_auto, CTLFLAG_RW,
&snd_unit_auto, 0, "assign default unit to a newly attached device");
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 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(SNDSTAT_PREPARE_PCM_ARGS)
{
SNDSTAT_PREPARE_PCM_BEGIN();
SNDSTAT_PREPARE_PCM_END();
}
void *
snd_mtxcreate(const char *desc, const char *type)
{
struct mtx *m;
m = malloc(sizeof(*m), M_DEVBUF, M_WAITOK | M_ZERO);
mtx_init(m, desc, type, MTX_DEF);
return m;
}
void
snd_mtxfree(void *m)
{
struct mtx *mtx = m;
mtx_destroy(mtx);
free(mtx, M_DEVBUF);
}
void
snd_mtxassert(void *m)
{
#ifdef INVARIANTS
struct mtx *mtx = m;
mtx_assert(mtx, MA_OWNED);
#endif
}
int
snd_setup_intr(device_t dev, struct resource *res, int flags, driver_intr_t hand, void *param, void **cookiep)
{
struct snddev_info *d;
flags &= INTR_MPSAFE;
flags |= INTR_TYPE_AV;
d = device_get_softc(dev);
if (d != NULL && (flags & INTR_MPSAFE))
d->flags |= SD_F_MPSAFE;
return bus_setup_intr(dev, res, flags,
#if __FreeBSD_version >= 700031
NULL,
#endif
hand, param, cookiep);
}
static void
pcm_clonereset(struct snddev_info *d)
{
int cmax;
PCM_BUSYASSERT(d);
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);
}
int
pcm_setvchans(struct snddev_info *d, int direction, int newcnt, int num)
{
struct pcm_channel *c, *ch, *nch;
struct pcmchan_caps *caps;
int i, err, vcnt;
PCM_BUSYASSERT(d);
if ((direction == PCMDIR_PLAY && d->playcount < 1) ||
(direction == PCMDIR_REC && d->reccount < 1))
return (ENODEV);
if (!(d->flags & SD_F_AUTOVCHAN))
return (EINVAL);
if (newcnt < 0 || newcnt > SND_MAXVCHANS)
return (E2BIG);
if (direction == PCMDIR_PLAY)
vcnt = d->pvchancount;
else if (direction == PCMDIR_REC)
vcnt = d->rvchancount;
else
return (EINVAL);
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 */
ch = NULL;
CHN_FOREACH(c, d, channels.pcm) {
CHN_LOCK(c);
if (c->direction == direction &&
((c->flags & CHN_F_HAS_VCHAN) || (vcnt == 0 &&
c->refcount < 1 &&
!(c->flags & (CHN_F_BUSY | CHN_F_VIRTUAL))))) {
/*
* Reuse hw channel with vchans already
* created.
*/
if (c->flags & CHN_F_HAS_VCHAN) {
ch = c;
break;
}
/*
* No vchans ever created, look for
* channels with supported formats.
*/
caps = chn_getcaps(c);
if (caps == NULL) {
CHN_UNLOCK(c);
continue;
}
for (i = 0; caps->fmtlist[i] != 0; i++) {
if (caps->fmtlist[i] & AFMT_CONVERTIBLE)
break;
}
if (caps->fmtlist[i] != 0) {
ch = c;
break;
}
}
CHN_UNLOCK(c);
}
if (ch == NULL)
return (EBUSY);
ch->flags |= CHN_F_BUSY;
err = 0;
while (err == 0 && newcnt > vcnt) {
err = vchan_create(ch, 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)
ch->flags &= ~CHN_F_BUSY;
CHN_UNLOCK(ch);
if (err != 0)
return (err);
else
pcm_clonereset(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 (vcnt == 1 && c->refcount > 0) {
CHN_UNLOCK(ch);
break;
}
if (!(ch->flags & CHN_F_BUSY) &&
ch->refcount < 1) {
err = vchan_destroy(ch);
if (err == 0)
vcnt--;
} else
CHN_UNLOCK(ch);
if (vcnt == newcnt)
break;
}
CHN_UNLOCK(c);
break;
}
pcm_clonereset(d);
}
return (0);
}
/* return error status and a locked channel */
int
pcm_chnalloc(struct snddev_info *d, struct pcm_channel **ch, int direction,
pid_t pid, char *comm, int devunit)
{
struct pcm_channel *c;
int err, vchancount, vchan_num;
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));
PCM_BUSYASSERT(d);
/* 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 (ENOTSUP);
break;
case SND_DEV_DSPHW_REC:
case SND_DEV_DSPHW_VREC:
if (direction != PCMDIR_REC)
return (ENOTSUP);
break;
default:
if (!(direction == PCMDIR_PLAY ||
direction == PCMDIR_REC))
return (ENOTSUP);
break;
}
}
*ch = NULL;
vchan_num = 0;
vchancount = (direction == PCMDIR_PLAY) ? d->pvchancount :
d->rvchancount;
retry_chnalloc:
err = ENOTSUP;
/* scan for a free channel */
CHN_FOREACH(c, d, channels.pcm) {
CHN_LOCK(c);
if (devunit == -1 && c->direction == direction &&
(c->flags & CHN_F_VIRTUAL)) {
if (vchancount < snd_maxautovchans &&
vchan_num < CHN_CHAN(c)) {
CHN_UNLOCK(c);
goto vchan_alloc;
}
vchan_num++;
}
if (c->direction == direction && !(c->flags & CHN_F_BUSY) &&
(devunit == -1 || devunit == -2 || c->unit == devunit)) {
c->flags |= CHN_F_BUSY;
c->pid = pid;
strlcpy(c->comm, (comm != NULL) ? comm :
CHN_COMM_UNKNOWN, sizeof(c->comm));
*ch = c;
return (0);
} else if (c->unit == devunit) {
if (c->direction != direction)
err = ENOTSUP;
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);
}
if (devunit == -2)
return (err);
vchan_alloc:
/* no channel available */
if (devunit == -1 || snd_unit2d(devunit) == SND_DEV_DSPHW_VPLAY ||
snd_unit2d(devunit) == SND_DEV_DSPHW_VREC) {
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)
{
PCM_BUSYASSERT(c->parentsnddev);
CHN_LOCKASSERT(c);
c->flags &= ~CHN_F_BUSY;
c->pid = -1;
strlcpy(c->comm, CHN_COMM_UNUSED, sizeof(c->comm));
CHN_UNLOCK(c);
return (0);
}
int
pcm_chnref(struct pcm_channel *c, int ref)
{
PCM_BUSYASSERT(c->parentsnddev);
CHN_LOCKASSERT(c);
c->refcount += ref;
return (c->refcount);
}
int
pcm_inprog(struct snddev_info *d, int delta)
{
PCM_LOCKASSERT(d);
d->inprog += delta;
return (d->inprog);
}
static void
pcm_setmaxautovchans(struct snddev_info *d, int num)
{
PCM_BUSYASSERT(d);
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_clonereset(d);
}
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, 0, req);
if (error == 0 && req->newptr != NULL) {
d = devclass_get_softc(pcm_devclass, unit);
if (!PCM_REGISTERED(d) || CHN_EMPTY(d, channels.pcm))
return EINVAL;
snd_unit = unit;
snd_unit_auto = 0;
}
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");
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, 0, 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 (!PCM_REGISTERED(d))
continue;
PCM_ACQUIRE_QUICK(d);
pcm_setmaxautovchans(d, v);
PCM_RELEASE_QUICK(d);
}
}
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];
PCM_BUSYASSERT(d);
PCM_LOCKASSERT(d);
KASSERT(num >= -1, ("invalid num=%d", num));
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:
return (NULL);
}
chan = (num == -1) ? 0 : num;
if (*pnum >= max || chan >= max)
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);
return (NULL);
}
chan++;
if (chan >= max) {
device_printf(d->dev,
"chan=%d > %d\n", chan, max);
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);
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);
return (NULL);
}
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;
strlcpy(ch->comm, CHN_COMM_UNUSED, sizeof(ch->comm));
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);
PCM_LOCK(d);
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);
return (NULL);
}
return (ch);
}
int
pcm_chn_destroy(struct pcm_channel *ch)
{
struct snddev_info *d;
int err;
d = ch->parentsnddev;
PCM_BUSYASSERT(d);
err = chn_kill(ch);
if (err) {
device_printf(ch->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)
{
PCM_BUSYASSERT(d);
PCM_LOCKASSERT(d);
KASSERT(ch != NULL && (ch->direction == PCMDIR_PLAY ||
ch->direction == PCMDIR_REC), ("Invalid pcm channel"));
CHN_INSERT_SORT_ASCEND(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;
}
d->devcount++;
return (0);
}
int
pcm_chn_remove(struct snddev_info *d, struct pcm_channel *ch)
{
struct pcm_channel *tmp;
PCM_BUSYASSERT(d);
PCM_LOCKASSERT(d);
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;
}
d->devcount--;
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;
PCM_BUSYASSERT(d);
PCM_LOCK(d);
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);
PCM_UNLOCK(d);
return (ENODEV);
}
err = pcm_chn_add(d, ch);
PCM_UNLOCK(d);
if (err) {
device_printf(d->dev, "pcm_chn_add(%s) failed, err=%d\n",
ch->name, err);
pcm_chn_destroy(ch);
}
return (err);
}
static int
pcm_killchan(device_t dev)
{
struct snddev_info *d = device_get_softc(dev);
struct pcm_channel *ch;
int error;
PCM_BUSYASSERT(d);
ch = CHN_FIRST(d, channels.pcm);
PCM_LOCK(d);
error = pcm_chn_remove(d, ch);
PCM_UNLOCK(d);
if (error)
return (error);
return (pcm_chn_destroy(ch));
}
static int
pcm_best_unit(int old)
{
struct snddev_info *d;
int i, best, bestprio, prio;
best = -1;
bestprio = -100;
for (i = 0; pcm_devclass != NULL &&
i < devclass_get_maxunit(pcm_devclass); i++) {
d = devclass_get_softc(pcm_devclass, i);
if (!PCM_REGISTERED(d))
continue;
prio = 0;
if (d->playcount == 0)
prio -= 10;
if (d->reccount == 0)
prio -= 2;
if (prio > bestprio || (prio == bestprio && i == old)) {
best = i;
bestprio = prio;
}
}
return (best);
}
int
pcm_setstatus(device_t dev, char *str)
{
struct snddev_info *d = device_get_softc(dev);
PCM_BUSYASSERT(d);
if (d->playcount == 0 || d->reccount == 0)
d->flags |= SD_F_SIMPLEX;
if ((d->playcount > 0 || d->reccount > 0) &&
!(d->flags & SD_F_AUTOVCHAN)) {
d->flags |= SD_F_AUTOVCHAN;
vchan_initsys(dev);
}
pcm_setmaxautovchans(d, snd_maxautovchans);
strlcpy(d->status, str, SND_STATUSLEN);
PCM_LOCK(d);
/* Last stage, enable cloning. */
if (d->clones != NULL)
(void)snd_clone_enable(d->clones);
/* Done, we're ready.. */
d->flags |= SD_F_REGISTERED;
PCM_RELEASE(d);
PCM_UNLOCK(d);
if (snd_unit_auto < 0)
snd_unit_auto = (snd_unit < 0) ? 1 : 0;
if (snd_unit < 0 || snd_unit_auto > 1)
snd_unit = device_get_unit(dev);
else if (snd_unit_auto == 1)
snd_unit = pcm_best_unit(snd_unit);
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;
}
static int
sysctl_dev_pcm_bitperfect(SYSCTL_HANDLER_ARGS)
{
struct snddev_info *d;
int err, val;
d = oidp->oid_arg1;
if (!PCM_REGISTERED(d))
return (ENODEV);
PCM_LOCK(d);
PCM_WAIT(d);
val = (d->flags & SD_F_BITPERFECT) ? 1 : 0;
PCM_ACQUIRE(d);
PCM_UNLOCK(d);
err = sysctl_handle_int(oidp, &val, 0, req);
if (err == 0 && req->newptr != NULL) {
if (!(val == 0 || val == 1)) {
PCM_RELEASE_QUICK(d);
return (EINVAL);
}
PCM_LOCK(d);
d->flags &= ~SD_F_BITPERFECT;
d->flags |= (val != 0) ? SD_F_BITPERFECT : 0;
PCM_RELEASE(d);
PCM_UNLOCK(d);
} else
PCM_RELEASE_QUICK(d);
return (err);
}
#ifdef 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 (!PCM_REGISTERED(d) || d->clones == NULL)
return (ENODEV);
PCM_ACQUIRE_QUICK(d);
flags = snd_clone_getflags(d->clones);
err = sysctl_handle_int(oidp, &flags, 0, req);
if (err == 0 && req->newptr != NULL) {
if (flags & ~SND_CLONE_MASK)
err = EINVAL;
else
(void)snd_clone_setflags(d->clones, flags);
}
PCM_RELEASE_QUICK(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 (!PCM_REGISTERED(d) || d->clones == NULL)
return (ENODEV);
PCM_ACQUIRE_QUICK(d);
deadline = snd_clone_getdeadline(d->clones);
err = sysctl_handle_int(oidp, &deadline, 0, req);
if (err == 0 && req->newptr != NULL) {
if (deadline < 0)
err = EINVAL;
else
(void)snd_clone_setdeadline(d->clones, deadline);
}
PCM_RELEASE_QUICK(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 (!PCM_REGISTERED(d) || d->clones == NULL)
return (ENODEV);
val = 0;
err = sysctl_handle_int(oidp, &val, 0, req);
if (err == 0 && req->newptr != NULL && val != 0) {
PCM_ACQUIRE_QUICK(d);
val = snd_clone_gc(d->clones);
PCM_RELEASE_QUICK(d);
if (bootverbose != 0 || snd_verbose > 3)
device_printf(d->dev, "clone gc: pruned=%d\n", val);
}
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, 0, 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 (!PCM_REGISTERED(d) || d->clones == NULL)
continue;
PCM_ACQUIRE_QUICK(d);
val = snd_clone_gc(d->clones);
PCM_RELEASE_QUICK(d);
if (bootverbose != 0 || snd_verbose > 3)
device_printf(d->dev, "clone gc: pruned=%d\n",
val);
}
}
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;
int i;
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->dev = dev;
d->lock = snd_mtxcreate(device_get_nameunit(dev), "sound cdev");
cv_init(&d->cv, device_get_nameunit(dev));
PCM_ACQUIRE_QUICK(d);
dsp_cdevinfo_init(d);
#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
i = 0;
if (resource_int_value(device_get_name(dev), device_get_unit(dev),
"vpc", &i) != 0 || i != 0)
d->flags |= SD_F_VPC;
if (resource_int_value(device_get_name(dev), device_get_unit(dev),
"bitperfect", &i) == 0 && i != 0)
d->flags |= SD_F_BITPERFECT;
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 initialization through
* pcm_setstatus().
*/
d->clones = snd_clone_create(SND_U_MASK | SND_D_MASK, PCMMAXCLONE,
SND_CLONE_DEADLINE_DEFAULT, SND_CLONE_WAITOK |
SND_CLONE_GC_ENABLE | SND_CLONE_GC_UNREF |
SND_CLONE_GC_LASTREF | SND_CLONE_GC_EXPIRED);
if (bootverbose != 0 || snd_verbose > 3) {
device_printf(dev,
"clone manager: deadline=%dms flags=0x%08x\n",
snd_clone_getdeadline(d->clones),
snd_clone_getflags(d->clones));
}
CHN_INIT(d, channels.pcm);
CHN_INIT(d, channels.pcm.busy);
CHN_INIT(d, channels.pcm.opened);
/* XXX This is incorrect, but lets play along for now. */
if ((numplay == 0 || numrec == 0) && numplay != numrec)
d->flags |= SD_F_SIMPLEX;
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_UINT(device_get_sysctl_ctx(dev),
SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
OID_AUTO, "buffersize", CTLFLAG_RD, &d->bufsz, 0, "allocated buffer size");
SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
"bitperfect", CTLTYPE_INT | CTLFLAG_RW, d, sizeof(d),
sysctl_dev_pcm_bitperfect, "I",
"bit-perfect playback/recording (0=disable, 1=enable)");
#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
if (numplay > 0 || numrec > 0) {
d->flags |= SD_F_AUTOVCHAN;
vchan_initsys(dev);
}
if (d->flags & SD_F_EQ)
feeder_eq_initsys(dev);
sndstat_register(dev, d->status, sndstat_prepare_pcm);
return 0;
}
int
pcm_unregister(device_t dev)
{
struct snddev_info *d;
struct pcm_channel *ch;
struct thread *td;
td = curthread;
d = device_get_softc(dev);
if (!PCM_ALIVE(d)) {
device_printf(dev, "unregister: device not configured\n");
return (0);
}
if (sndstat_acquire(td) != 0) {
device_printf(dev, "unregister: sndstat busy\n");
return (EBUSY);
}
PCM_LOCK(d);
PCM_WAIT(d);
if (d->inprog != 0) {
device_printf(dev, "unregister: operation in progress\n");
PCM_UNLOCK(d);
sndstat_release(td);
return (EBUSY);
}
PCM_ACQUIRE(d);
PCM_UNLOCK(d);
CHN_FOREACH(ch, d, channels.pcm) {
CHN_LOCK(ch);
if (ch->refcount > 0) {
device_printf(dev,
"unregister: channel %s busy (pid %d)\n",
ch->name, ch->pid);
CHN_UNLOCK(ch);
PCM_RELEASE_QUICK(d);
sndstat_release(td);
return (EBUSY);
}
CHN_UNLOCK(ch);
}
if (d->clones != NULL) {
if (snd_clone_busy(d->clones) != 0) {
device_printf(dev, "unregister: clone busy\n");
PCM_RELEASE_QUICK(d);
sndstat_release(td);
return (EBUSY);
} else {
PCM_LOCK(d);
(void)snd_clone_disable(d->clones);
PCM_UNLOCK(d);
}
}
if (mixer_uninit(dev) == EBUSY) {
device_printf(dev, "unregister: mixer busy\n");
PCM_LOCK(d);
if (d->clones != NULL)
(void)snd_clone_enable(d->clones);
PCM_RELEASE(d);
PCM_UNLOCK(d);
sndstat_release(td);
return (EBUSY);
}
PCM_LOCK(d);
d->flags |= SD_F_DYING;
d->flags &= ~SD_F_REGISTERED;
PCM_UNLOCK(d);
/*
* No lock being held, so this thing can be flushed without
* stucking into devdrn oblivion.
*/
if (d->clones != NULL) {
snd_clone_destroy(d->clones);
d->clones = NULL;
}
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;
}
while (!CHN_EMPTY(d, channels.pcm))
pcm_killchan(dev);
dsp_cdevinfo_flush(d);
PCM_LOCK(d);
PCM_RELEASE(d);
cv_destroy(&d->cv);
PCM_UNLOCK(d);
snd_mtxfree(d->lock);
sndstat_unregister(dev);
sndstat_release(td);
if (snd_unit == device_get_unit(dev)) {
snd_unit = pcm_best_unit(-1);
if (snd_unit_auto == 0)
snd_unit_auto = 1;
}
return (0);
}
/************************************************************************/
/**
* @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 char si_license[] = "BSD";
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;
strlcpy(si->license, si_license, sizeof(si->license));
/*
* 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));
j = 0;
for (i = 0; pcm_devclass != NULL &&
i < devclass_get_maxunit(pcm_devclass); i++) {
d = devclass_get_softc(pcm_devclass, i);
if (!PCM_REGISTERED(d))
continue;
/* XXX Need Giant magic entry ??? */
/* See note in function's docblock */
PCM_UNLOCKASSERT(d);
PCM_LOCK(d);
si->numaudios += d->devcount;
++ncards;
CHN_FOREACH(c, d, channels.pcm) {
CHN_UNLOCKASSERT(c);
CHN_LOCK(c);
if (c->flags & CHN_F_BUSY)
si->openedaudio[j / intnbits] |=
(1 << (j % intnbits));
CHN_UNLOCK(c);
j++;
}
PCM_UNLOCK(d);
}
si->numaudioengines = si->numaudios;
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;
}
int
sound_oss_card_info(oss_card_info *si)
{
struct snddev_info *d;
int i, ncards;
ncards = 0;
for (i = 0; pcm_devclass != NULL &&
i < devclass_get_maxunit(pcm_devclass); i++) {
d = devclass_get_softc(pcm_devclass, i);
if (!PCM_REGISTERED(d))
continue;
if (ncards++ != si->card)
continue;
PCM_UNLOCKASSERT(d);
PCM_LOCK(d);
strlcpy(si->shortname, device_get_nameunit(d->dev),
sizeof(si->shortname));
strlcpy(si->longname, device_get_desc(d->dev),
sizeof(si->longname));
strlcpy(si->hw_info, d->status, sizeof(si->hw_info));
si->intr_count = si->ack_count = 0;
PCM_UNLOCK(d);
return (0);
}
return (ENXIO);
}
/************************************************************************/
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:
ret = sndstat_acquire(curthread);
if (ret != 0)
break;
if (pcmsg_unrhdr != NULL) {
delete_unrhdr(pcmsg_unrhdr);
pcmsg_unrhdr = NULL;
}
break;
case MOD_SHUTDOWN:
break;
default:
ret = ENOTSUP;
}
return ret;
#endif
}
DEV_MODULE(sound, sound_modevent, NULL);
MODULE_VERSION(sound, SOUND_MODVER);
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