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freebsd-dev/sys/dev/sound/pcm/sound.h
Hans Petter Selasky cc1efc23c8 Implement a detaching flag for the sound(4) subsystem to take 
appropriate actions when we are trying to detach an audio device,
but cannot because someone is using it.

This avoids applications having to wait for the DSP read data
timeout before they receive any error indication.
Tested with virtual_oss(8).

Remove some unused definitions while at it.

PR:		194727
MFC after:	1 week
Sponsored by:	Mellanox Technologies
2020-03-04 17:23:20 +00:00

621 lines
19 KiB
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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2005-2009 Ariff Abdullah <ariff@FreeBSD.org>
* Copyright (c) 1999 Cameron Grant <cg@FreeBSD.org>
* Copyright (c) 1995 Hannu Savolainen
* 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.
*
* $FreeBSD$
*/
/*
* first, include kernel header files.
*/
#ifndef _OS_H_
#define _OS_H_
#ifdef _KERNEL
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/eventhandler.h>
#include <sys/ioccom.h>
#include <sys/filio.h>
#include <sys/sockio.h>
#include <sys/fcntl.h>
#include <sys/selinfo.h>
#include <sys/proc.h>
#include <sys/kernel.h> /* for DATA_SET */
#include <sys/module.h>
#include <sys/conf.h>
#include <sys/file.h>
#include <sys/uio.h>
#include <sys/syslog.h>
#include <sys/errno.h>
#include <sys/malloc.h>
#include <sys/bus.h>
#include <machine/resource.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <sys/limits.h>
#include <sys/mman.h>
#include <sys/poll.h>
#include <sys/sbuf.h>
#include <sys/soundcard.h>
#include <sys/sysctl.h>
#include <sys/kobj.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/condvar.h>
#ifndef KOBJMETHOD_END
#define KOBJMETHOD_END { NULL, NULL }
#endif
struct pcm_channel;
struct pcm_feeder;
struct snd_dbuf;
struct snd_mixer;
#include <dev/sound/pcm/buffer.h>
#include <dev/sound/pcm/matrix.h>
#include <dev/sound/pcm/matrix_map.h>
#include <dev/sound/pcm/channel.h>
#include <dev/sound/pcm/feeder.h>
#include <dev/sound/pcm/mixer.h>
#include <dev/sound/pcm/dsp.h>
#include <dev/sound/clone.h>
#include <dev/sound/unit.h>
#define PCM_SOFTC_SIZE (sizeof(struct snddev_info))
#define SND_STATUSLEN 64
#define SOUND_MODVER 5
#define SOUND_MINVER SOUND_MODVER
#define SOUND_PREFVER SOUND_MODVER
#define SOUND_MAXVER SOUND_MODVER
/*
* We're abusing the fact that MAXMINOR still have enough room
* for our bit twiddling and nobody ever need 512 unique soundcards,
* 32 unique device types and 1024 unique cloneable devices for the
* next 100 years...
*/
#define PCMMAXUNIT (snd_max_u())
#define PCMMAXDEV (snd_max_d())
#define PCMMAXCHAN (snd_max_c())
#define PCMMAXCLONE PCMMAXCHAN
#define PCMUNIT(x) (snd_unit2u(dev2unit(x)))
#define PCMDEV(x) (snd_unit2d(dev2unit(x)))
#define PCMCHAN(x) (snd_unit2c(dev2unit(x)))
/* XXX unit2minor compat */
#define PCMMINOR(x) (x)
/*
* By design, limit possible channels for each direction.
*/
#define SND_MAXHWCHAN 256
#define SND_MAXVCHANS SND_MAXHWCHAN
#define SD_F_SIMPLEX 0x00000001
#define SD_F_AUTOVCHAN 0x00000002
#define SD_F_SOFTPCMVOL 0x00000004
#define SD_F_DYING 0x00000008
#define SD_F_DETACHING 0x00000010
#define SD_F_BUSY 0x00000020
#define SD_F_MPSAFE 0x00000040
#define SD_F_REGISTERED 0x00000080
#define SD_F_BITPERFECT 0x00000100
#define SD_F_VPC 0x00000200 /* volume-per-channel */
#define SD_F_EQ 0x00000400 /* EQ */
#define SD_F_EQ_ENABLED 0x00000800 /* EQ enabled */
#define SD_F_EQ_BYPASSED 0x00001000 /* EQ bypassed */
#define SD_F_EQ_PC 0x00002000 /* EQ per-channel */
#define SD_F_EQ_DEFAULT (SD_F_EQ | SD_F_EQ_ENABLED)
#define SD_F_EQ_MASK (SD_F_EQ | SD_F_EQ_ENABLED | \
SD_F_EQ_BYPASSED | SD_F_EQ_PC)
#define SD_F_PRIO_RD 0x10000000
#define SD_F_PRIO_WR 0x20000000
#define SD_F_PRIO_SET (SD_F_PRIO_RD | SD_F_PRIO_WR)
#define SD_F_DIR_SET 0x40000000
#define SD_F_TRANSIENT 0xf0000000
#define SD_F_BITS "\020" \
"\001SIMPLEX" \
"\002AUTOVCHAN" \
"\003SOFTPCMVOL" \
"\004DYING" \
"\005DETACHING" \
"\006BUSY" \
"\007MPSAFE" \
"\010REGISTERED" \
"\011BITPERFECT" \
"\012VPC" \
"\013EQ" \
"\014EQ_ENABLED" \
"\015EQ_BYPASSED" \
"\016EQ_PC" \
"\035PRIO_RD" \
"\036PRIO_WR" \
"\037DIR_SET"
#define PCM_ALIVE(x) ((x) != NULL && (x)->lock != NULL && \
!((x)->flags & SD_F_DYING))
#define PCM_REGISTERED(x) (PCM_ALIVE(x) && \
((x)->flags & SD_F_REGISTERED))
#define PCM_DETACHING(x) ((x)->flags & SD_F_DETACHING)
/* many variables should be reduced to a range. Here define a macro */
#define RANGE(var, low, high) (var) = \
(((var)<(low))? (low) : ((var)>(high))? (high) : (var))
#define DSP_BUFFSIZE (8192)
/* make figuring out what a format is easier. got AFMT_STEREO already */
#define AFMT_32BIT (AFMT_S32_LE | AFMT_S32_BE | AFMT_U32_LE | AFMT_U32_BE)
#define AFMT_24BIT (AFMT_S24_LE | AFMT_S24_BE | AFMT_U24_LE | AFMT_U24_BE)
#define AFMT_16BIT (AFMT_S16_LE | AFMT_S16_BE | AFMT_U16_LE | AFMT_U16_BE)
#define AFMT_G711 (AFMT_MU_LAW | AFMT_A_LAW)
#define AFMT_8BIT (AFMT_G711 | AFMT_U8 | AFMT_S8)
#define AFMT_SIGNED (AFMT_S32_LE | AFMT_S32_BE | AFMT_S24_LE | AFMT_S24_BE | \
AFMT_S16_LE | AFMT_S16_BE | AFMT_S8)
#define AFMT_BIGENDIAN (AFMT_S32_BE | AFMT_U32_BE | AFMT_S24_BE | AFMT_U24_BE | \
AFMT_S16_BE | AFMT_U16_BE)
#define AFMT_CONVERTIBLE (AFMT_8BIT | AFMT_16BIT | AFMT_24BIT | \
AFMT_32BIT)
/* Supported vchan mixing formats */
#define AFMT_VCHAN (AFMT_CONVERTIBLE & ~AFMT_G711)
#define AFMT_PASSTHROUGH AFMT_AC3
#define AFMT_PASSTHROUGH_RATE 48000
#define AFMT_PASSTHROUGH_CHANNEL 2
#define AFMT_PASSTHROUGH_EXTCHANNEL 0
/*
* We're simply using unused, contiguous bits from various AFMT_ definitions.
* ~(0xb00ff7ff)
*/
#define AFMT_ENCODING_MASK 0xf00fffff
#define AFMT_CHANNEL_MASK 0x07f00000
#define AFMT_CHANNEL_SHIFT 20
#define AFMT_CHANNEL_MAX 0x7f
#define AFMT_EXTCHANNEL_MASK 0x08000000
#define AFMT_EXTCHANNEL_SHIFT 27
#define AFMT_EXTCHANNEL_MAX 1
#define AFMT_ENCODING(v) ((v) & AFMT_ENCODING_MASK)
#define AFMT_EXTCHANNEL(v) (((v) & AFMT_EXTCHANNEL_MASK) >> \
AFMT_EXTCHANNEL_SHIFT)
#define AFMT_CHANNEL(v) (((v) & AFMT_CHANNEL_MASK) >> \
AFMT_CHANNEL_SHIFT)
#define AFMT_BIT(v) (((v) & AFMT_32BIT) ? 32 : \
(((v) & AFMT_24BIT) ? 24 : \
((((v) & AFMT_16BIT) || \
((v) & AFMT_PASSTHROUGH)) ? 16 : 8)))
#define AFMT_BPS(v) (AFMT_BIT(v) >> 3)
#define AFMT_ALIGN(v) (AFMT_BPS(v) * AFMT_CHANNEL(v))
#define SND_FORMAT(f, c, e) (AFMT_ENCODING(f) | \
(((c) << AFMT_CHANNEL_SHIFT) & \
AFMT_CHANNEL_MASK) | \
(((e) << AFMT_EXTCHANNEL_SHIFT) & \
AFMT_EXTCHANNEL_MASK))
#define AFMT_U8_NE AFMT_U8
#define AFMT_S8_NE AFMT_S8
#define AFMT_SIGNED_NE (AFMT_S8_NE | AFMT_S16_NE | AFMT_S24_NE | AFMT_S32_NE)
#define AFMT_NE (AFMT_SIGNED_NE | AFMT_U8_NE | AFMT_U16_NE | \
AFMT_U24_NE | AFMT_U32_NE)
/*
* Minor numbers for the sound driver.
*
* Unfortunately Creative called the codec chip of SB as a DSP. For this
* reason the /dev/dsp is reserved for digitized audio use. There is a
* device for true DSP processors but it will be called something else.
* In v3.0 it's /dev/sndproc but this could be a temporary solution.
*/
#define SND_DEV_CTL 0 /* Control port /dev/mixer */
#define SND_DEV_SEQ 1 /* Sequencer /dev/sequencer */
#define SND_DEV_MIDIN 2 /* Raw midi access */
#define SND_DEV_DSP 3 /* Digitized voice /dev/dsp */
#define SND_DEV_AUDIO 4 /* Sparc compatible /dev/audio */
#define SND_DEV_DSP16 5 /* Like /dev/dsp but 16 bits/sample */
#define SND_DEV_STATUS 6 /* /dev/sndstat */
/* #7 not in use now. */
#define SND_DEV_SEQ2 8 /* /dev/sequencer, level 2 interface */
#define SND_DEV_SNDPROC 9 /* /dev/sndproc for programmable devices */
#define SND_DEV_PSS SND_DEV_SNDPROC /* ? */
#define SND_DEV_NORESET 10
#define SND_DEV_DSPHW_PLAY 11 /* specific playback channel */
#define SND_DEV_DSPHW_VPLAY 12 /* specific virtual playback channel */
#define SND_DEV_DSPHW_REC 13 /* specific record channel */
#define SND_DEV_DSPHW_VREC 14 /* specific virtual record channel */
#define SND_DEV_DSPHW_CD 15 /* s16le/stereo 44100Hz CD */
/*
* OSSv4 compatible device. For now, it serve no purpose and
* the cloning itself will forward the request to ordinary /dev/dsp
* instead.
*/
#define SND_DEV_DSP_MMAP 16 /* /dev/dsp_mmap */
#define SND_DEV_DSP_AC3 17 /* /dev/dsp_ac3 */
#define SND_DEV_DSP_MULTICH 18 /* /dev/dsp_multich */
#define SND_DEV_DSP_SPDIFOUT 19 /* /dev/dsp_spdifout */
#define SND_DEV_DSP_SPDIFIN 20 /* /dev/dsp_spdifin */
#define SND_DEV_LAST SND_DEV_DSP_SPDIFIN
#define SND_DEV_MAX PCMMAXDEV
#define DSP_DEFAULT_SPEED 8000
#define ON 1
#define OFF 0
extern int pcm_veto_load;
extern int snd_unit;
extern int snd_maxautovchans;
extern int snd_verbose;
extern devclass_t pcm_devclass;
extern struct unrhdr *pcmsg_unrhdr;
/*
* some macros for debugging purposes
* DDB/DEB to enable/disable debugging stuff
* BVDDB to enable debugging when bootverbose
*/
#define BVDDB(x) if (bootverbose) x
#ifndef DEB
#define DEB(x)
#endif
SYSCTL_DECL(_hw_snd);
int pcm_setvchans(struct snddev_info *d, int direction, int newcnt, int num);
int pcm_chnalloc(struct snddev_info *d, struct pcm_channel **ch, int direction,
pid_t pid, char *comm, int devunit);
int pcm_chnrelease(struct pcm_channel *c);
int pcm_chnref(struct pcm_channel *c, int ref);
int pcm_inprog(struct snddev_info *d, int delta);
struct pcm_channel *pcm_chn_create(struct snddev_info *d, struct pcm_channel *parent, kobj_class_t cls, int dir, int num, void *devinfo);
int pcm_chn_destroy(struct pcm_channel *ch);
int pcm_chn_add(struct snddev_info *d, struct pcm_channel *ch);
int pcm_chn_remove(struct snddev_info *d, struct pcm_channel *ch);
int pcm_addchan(device_t dev, int dir, kobj_class_t cls, void *devinfo);
unsigned int pcm_getbuffersize(device_t dev, unsigned int minbufsz, unsigned int deflt, unsigned int maxbufsz);
int pcm_register(device_t dev, void *devinfo, int numplay, int numrec);
int pcm_unregister(device_t dev);
int pcm_setstatus(device_t dev, char *str);
u_int32_t pcm_getflags(device_t dev);
void pcm_setflags(device_t dev, u_int32_t val);
void *pcm_getdevinfo(device_t dev);
int snd_setup_intr(device_t dev, struct resource *res, int flags,
driver_intr_t hand, void *param, void **cookiep);
void *snd_mtxcreate(const char *desc, const char *type);
void snd_mtxfree(void *m);
void snd_mtxassert(void *m);
#define snd_mtxlock(m) mtx_lock(m)
#define snd_mtxunlock(m) mtx_unlock(m)
typedef int (*sndstat_handler)(struct sbuf *s, device_t dev, int verbose);
int sndstat_register(device_t dev, char *str, sndstat_handler handler);
int sndstat_registerfile(char *str);
int sndstat_unregister(device_t dev);
int sndstat_unregisterfile(char *str);
#define SND_DECLARE_FILE(version) \
_SND_DECLARE_FILE(__LINE__, version)
#define _SND_DECLARE_FILE(uniq, version) \
__SND_DECLARE_FILE(uniq, version)
#define __SND_DECLARE_FILE(uniq, version) \
static char sndstat_vinfo[] = version; \
SYSINIT(sdf_ ## uniq, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, sndstat_registerfile, sndstat_vinfo); \
SYSUNINIT(sdf_ ## uniq, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, sndstat_unregisterfile, sndstat_vinfo);
/* usage of flags in device config entry (config file) */
#define DV_F_DRQ_MASK 0x00000007 /* mask for secondary drq */
#define DV_F_DUAL_DMA 0x00000010 /* set to use secondary dma channel */
/* ought to be made obsolete but still used by mss */
#define DV_F_DEV_MASK 0x0000ff00 /* force device type/class */
#define DV_F_DEV_SHIFT 8 /* force device type/class */
/*
* this is rather kludgey- we need to duplicate these struct def'ns from sound.c
* so that the macro versions of pcm_{,un}lock can dereference them.
* we also have to do this now makedev() has gone away.
*/
struct snddev_info {
struct {
struct {
SLIST_HEAD(, pcm_channel) head;
struct {
SLIST_HEAD(, pcm_channel) head;
} busy;
struct {
SLIST_HEAD(, pcm_channel) head;
} opened;
} pcm;
} channels;
TAILQ_HEAD(dsp_cdevinfo_linkhead, dsp_cdevinfo) dsp_cdevinfo_pool;
struct snd_clone *clones;
unsigned devcount, playcount, reccount, pvchancount, rvchancount ;
unsigned flags;
int inprog;
unsigned int bufsz;
void *devinfo;
device_t dev;
char status[SND_STATUSLEN];
struct mtx *lock;
struct cdev *mixer_dev;
uint32_t pvchanrate, pvchanformat;
uint32_t rvchanrate, rvchanformat;
int32_t eqpreamp;
struct sysctl_ctx_list play_sysctl_ctx, rec_sysctl_ctx;
struct sysctl_oid *play_sysctl_tree, *rec_sysctl_tree;
struct cv cv;
};
void sound_oss_sysinfo(oss_sysinfo *);
int sound_oss_card_info(oss_card_info *);
#define PCM_LOCKOWNED(d) mtx_owned((d)->lock)
#define PCM_LOCK(d) mtx_lock((d)->lock)
#define PCM_UNLOCK(d) mtx_unlock((d)->lock)
#define PCM_TRYLOCK(d) mtx_trylock((d)->lock)
#define PCM_LOCKASSERT(d) mtx_assert((d)->lock, MA_OWNED)
#define PCM_UNLOCKASSERT(d) mtx_assert((d)->lock, MA_NOTOWNED)
/*
* For PCM_[WAIT | ACQUIRE | RELEASE], be sure to surround these
* with PCM_LOCK/UNLOCK() sequence, or I'll come to gnaw upon you!
*/
#ifdef SND_DIAGNOSTIC
#define PCM_WAIT(x) do { \
if (!PCM_LOCKOWNED(x)) \
panic("%s(%d): [PCM WAIT] Mutex not owned!", \
__func__, __LINE__); \
while ((x)->flags & SD_F_BUSY) { \
if (snd_verbose > 3) \
device_printf((x)->dev, \
"%s(%d): [PCM WAIT] calling cv_wait().\n", \
__func__, __LINE__); \
cv_wait(&(x)->cv, (x)->lock); \
} \
} while (0)
#define PCM_ACQUIRE(x) do { \
if (!PCM_LOCKOWNED(x)) \
panic("%s(%d): [PCM ACQUIRE] Mutex not owned!", \
__func__, __LINE__); \
if ((x)->flags & SD_F_BUSY) \
panic("%s(%d): [PCM ACQUIRE] " \
"Trying to acquire BUSY cv!", __func__, __LINE__); \
(x)->flags |= SD_F_BUSY; \
} while (0)
#define PCM_RELEASE(x) do { \
if (!PCM_LOCKOWNED(x)) \
panic("%s(%d): [PCM RELEASE] Mutex not owned!", \
__func__, __LINE__); \
if ((x)->flags & SD_F_BUSY) { \
(x)->flags &= ~SD_F_BUSY; \
if ((x)->cv.cv_waiters != 0) { \
if ((x)->cv.cv_waiters > 1 && snd_verbose > 3) \
device_printf((x)->dev, \
"%s(%d): [PCM RELEASE] " \
"cv_waiters=%d > 1!\n", \
__func__, __LINE__, \
(x)->cv.cv_waiters); \
cv_broadcast(&(x)->cv); \
} \
} else \
panic("%s(%d): [PCM RELEASE] Releasing non-BUSY cv!", \
__func__, __LINE__); \
} while (0)
/* Quick version, for shorter path. */
#define PCM_ACQUIRE_QUICK(x) do { \
if (PCM_LOCKOWNED(x)) \
panic("%s(%d): [PCM ACQUIRE QUICK] Mutex owned!", \
__func__, __LINE__); \
PCM_LOCK(x); \
PCM_WAIT(x); \
PCM_ACQUIRE(x); \
PCM_UNLOCK(x); \
} while (0)
#define PCM_RELEASE_QUICK(x) do { \
if (PCM_LOCKOWNED(x)) \
panic("%s(%d): [PCM RELEASE QUICK] Mutex owned!", \
__func__, __LINE__); \
PCM_LOCK(x); \
PCM_RELEASE(x); \
PCM_UNLOCK(x); \
} while (0)
#define PCM_BUSYASSERT(x) do { \
if (!((x) != NULL && ((x)->flags & SD_F_BUSY))) \
panic("%s(%d): [PCM BUSYASSERT] " \
"Failed, snddev_info=%p", __func__, __LINE__, x); \
} while (0)
#define PCM_GIANT_ENTER(x) do { \
int _pcm_giant = 0; \
if (PCM_LOCKOWNED(x)) \
panic("%s(%d): [GIANT ENTER] PCM lock owned!", \
__func__, __LINE__); \
if (mtx_owned(&Giant) != 0 && snd_verbose > 3) \
device_printf((x)->dev, \
"%s(%d): [GIANT ENTER] Giant owned!\n", \
__func__, __LINE__); \
if (!((x)->flags & SD_F_MPSAFE) && mtx_owned(&Giant) == 0) \
do { \
mtx_lock(&Giant); \
_pcm_giant = 1; \
} while (0)
#define PCM_GIANT_EXIT(x) do { \
if (PCM_LOCKOWNED(x)) \
panic("%s(%d): [GIANT EXIT] PCM lock owned!", \
__func__, __LINE__); \
if (!(_pcm_giant == 0 || _pcm_giant == 1)) \
panic("%s(%d): [GIANT EXIT] _pcm_giant screwed!", \
__func__, __LINE__); \
if ((x)->flags & SD_F_MPSAFE) { \
if (_pcm_giant == 1) \
panic("%s(%d): [GIANT EXIT] MPSAFE Giant?", \
__func__, __LINE__); \
if (mtx_owned(&Giant) != 0 && snd_verbose > 3) \
device_printf((x)->dev, \
"%s(%d): [GIANT EXIT] Giant owned!\n", \
__func__, __LINE__); \
} \
if (_pcm_giant != 0) { \
if (mtx_owned(&Giant) == 0) \
panic("%s(%d): [GIANT EXIT] Giant not owned!", \
__func__, __LINE__); \
_pcm_giant = 0; \
mtx_unlock(&Giant); \
} \
} while (0)
#else /* SND_DIAGNOSTIC */
#define PCM_WAIT(x) do { \
PCM_LOCKASSERT(x); \
while ((x)->flags & SD_F_BUSY) \
cv_wait(&(x)->cv, (x)->lock); \
} while (0)
#define PCM_ACQUIRE(x) do { \
PCM_LOCKASSERT(x); \
KASSERT(!((x)->flags & SD_F_BUSY), \
("%s(%d): [PCM ACQUIRE] Trying to acquire BUSY cv!", \
__func__, __LINE__)); \
(x)->flags |= SD_F_BUSY; \
} while (0)
#define PCM_RELEASE(x) do { \
PCM_LOCKASSERT(x); \
KASSERT((x)->flags & SD_F_BUSY, \
("%s(%d): [PCM RELEASE] Releasing non-BUSY cv!", \
__func__, __LINE__)); \
(x)->flags &= ~SD_F_BUSY; \
if ((x)->cv.cv_waiters != 0) \
cv_broadcast(&(x)->cv); \
} while (0)
/* Quick version, for shorter path. */
#define PCM_ACQUIRE_QUICK(x) do { \
PCM_UNLOCKASSERT(x); \
PCM_LOCK(x); \
PCM_WAIT(x); \
PCM_ACQUIRE(x); \
PCM_UNLOCK(x); \
} while (0)
#define PCM_RELEASE_QUICK(x) do { \
PCM_UNLOCKASSERT(x); \
PCM_LOCK(x); \
PCM_RELEASE(x); \
PCM_UNLOCK(x); \
} while (0)
#define PCM_BUSYASSERT(x) KASSERT(x != NULL && \
((x)->flags & SD_F_BUSY), \
("%s(%d): [PCM BUSYASSERT] " \
"Failed, snddev_info=%p", \
__func__, __LINE__, x))
#define PCM_GIANT_ENTER(x) do { \
int _pcm_giant = 0; \
PCM_UNLOCKASSERT(x); \
if (!((x)->flags & SD_F_MPSAFE) && mtx_owned(&Giant) == 0) \
do { \
mtx_lock(&Giant); \
_pcm_giant = 1; \
} while (0)
#define PCM_GIANT_EXIT(x) do { \
PCM_UNLOCKASSERT(x); \
KASSERT(_pcm_giant == 0 || _pcm_giant == 1, \
("%s(%d): [GIANT EXIT] _pcm_giant screwed!", \
__func__, __LINE__)); \
KASSERT(!((x)->flags & SD_F_MPSAFE) || \
(((x)->flags & SD_F_MPSAFE) && _pcm_giant == 0), \
("%s(%d): [GIANT EXIT] MPSAFE Giant?", \
__func__, __LINE__)); \
if (_pcm_giant != 0) { \
mtx_assert(&Giant, MA_OWNED); \
_pcm_giant = 0; \
mtx_unlock(&Giant); \
} \
} while (0)
#endif /* !SND_DIAGNOSTIC */
#define PCM_GIANT_LEAVE(x) \
PCM_GIANT_EXIT(x); \
} while (0)
#ifdef KLD_MODULE
#define PCM_KLDSTRING(a) ("kld " # a)
#else
#define PCM_KLDSTRING(a) ""
#endif
#endif /* _KERNEL */
#endif /* _OS_H_ */
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