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freebsd-dev/sys/dev/sound/pcm/sound.c
Pedro F. Giffuni 718cf2ccb9 sys/dev: further adoption of SPDX licensing ID tags. 
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.
2017-11-27 14:52:40 +00:00

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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* 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;
static int snd_unit_auto = -1;
SYSCTL_INT(_hw_snd, OID_AUTO, default_auto, CTLFLAG_RWTUN,
&snd_unit_auto, 0, "assign default unit to a newly attached device");
int snd_maxautovchans = 16;
SYSCTL_NODE(_hw, OID_AUTO, snd, CTLFLAG_RD, 0, "Sound driver");
static void pcm_sysinit(device_t);
/*
* 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, NULL, 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_RWTUN | CTLFLAG_ANYBODY,
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_RWTUN,
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);
/* should only be called once */
if (d->flags & SD_F_REGISTERED)
return (EINVAL);
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;
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);
/*
* Create all sysctls once SD_F_REGISTERED is set else
* tunable sysctls won't work:
*/
pcm_sysinit(dev);
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_RWTUN,
0, sizeof(int), sysctl_hw_snd_clone_gc, "I",
"global clone garbage collector");
#endif
static void
pcm_sysinit(device_t dev)
{
struct snddev_info *d = device_get_softc(dev);
/* 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_RWTUN, 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_RWTUN, 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_RWTUN, 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_RWTUN, d, sizeof(d),
sysctl_dev_pcm_clone_gc, "I",
"clone garbage collector");
#endif
if (d->flags & SD_F_AUTOVCHAN)
vchan_initsys(dev);
if (d->flags & SD_F_EQ)
feeder_eq_initsys(dev);
}
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);
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");
if (numplay > 0 || numrec > 0)
d->flags |= SD_F_AUTOVCHAN;
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);
}
PCM_LOCK(d);
PCM_WAIT(d);
if (d->inprog != 0) {
device_printf(dev, "unregister: operation in progress\n");
PCM_UNLOCK(d);
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);
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);
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);
return (EBUSY);
}
/* remove /dev/sndstat entry first */
sndstat_unregister(dev);
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);
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:
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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