2 * Copyright (c) 2005-2009 Ariff Abdullah <ariff@FreeBSD.org>
3 * Copyright (c) 1999 Cameron Grant <cg@FreeBSD.org>
4 * Copyright (c) 1995 Hannu Savolainen
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * first, include kernel header files.
39 #include <sys/param.h>
40 #include <sys/systm.h>
41 #include <sys/ioccom.h>
42 #include <sys/filio.h>
43 #include <sys/sockio.h>
44 #include <sys/fcntl.h>
45 #include <sys/selinfo.h>
47 #include <sys/kernel.h> /* for DATA_SET */
48 #include <sys/module.h>
52 #include <sys/syslog.h>
53 #include <sys/errno.h>
54 #include <sys/malloc.h>
56 #if __FreeBSD_version < 500000
59 #include <machine/resource.h>
60 #include <machine/bus.h>
62 #include <sys/limits.h>
66 #include <sys/soundcard.h>
67 #include <sys/sysctl.h>
73 #include <sys/mutex.h>
74 #include <sys/condvar.h>
76 #ifndef KOBJMETHOD_END
77 #define KOBJMETHOD_END { NULL, NULL }
85 #include <dev/sound/pcm/buffer.h>
86 #include <dev/sound/pcm/matrix.h>
87 #include <dev/sound/pcm/matrix_map.h>
88 #include <dev/sound/pcm/channel.h>
89 #include <dev/sound/pcm/feeder.h>
90 #include <dev/sound/pcm/mixer.h>
91 #include <dev/sound/pcm/dsp.h>
92 #include <dev/sound/clone.h>
93 #include <dev/sound/unit.h>
95 #define PCM_SOFTC_SIZE (sizeof(struct snddev_info))
97 #define SND_STATUSLEN 64
99 #define SOUND_MODVER 5
101 #define SOUND_MINVER SOUND_MODVER
102 #define SOUND_PREFVER SOUND_MODVER
103 #define SOUND_MAXVER SOUND_MODVER
106 * We're abusing the fact that MAXMINOR still have enough room
107 * for our bit twiddling and nobody ever need 512 unique soundcards,
108 * 32 unique device types and 1024 unique cloneable devices for the
112 #define PCMMAXUNIT (snd_max_u())
113 #define PCMMAXDEV (snd_max_d())
114 #define PCMMAXCHAN (snd_max_c())
116 #define PCMMAXCLONE PCMMAXCHAN
118 #define PCMUNIT(x) (snd_unit2u(dev2unit(x)))
119 #define PCMDEV(x) (snd_unit2d(dev2unit(x)))
120 #define PCMCHAN(x) (snd_unit2c(dev2unit(x)))
122 /* XXX unit2minor compat */
123 #if __FreeBSD_version >= 800062
124 #define PCMMINOR(x) (x)
126 #define PCMMINOR(x) unit2minor(x)
130 * By design, limit possible channels for each direction.
132 #define SND_MAXHWCHAN 256
133 #define SND_MAXVCHANS SND_MAXHWCHAN
135 #define SD_F_SIMPLEX 0x00000001
136 #define SD_F_AUTOVCHAN 0x00000002
137 #define SD_F_SOFTPCMVOL 0x00000004
139 * Obsolete due to better matrixing
142 #define SD_F_PSWAPLR 0x00000008
143 #define SD_F_RSWAPLR 0x00000010
145 #define SD_F_DYING 0x00000008
146 #define SD_F_SUICIDE 0x00000010
147 #define SD_F_BUSY 0x00000020
148 #define SD_F_MPSAFE 0x00000040
149 #define SD_F_REGISTERED 0x00000080
150 #define SD_F_BITPERFECT 0x00000100
151 #define SD_F_VPC 0x00000200 /* volume-per-channel */
152 #define SD_F_EQ 0x00000400 /* EQ */
153 #define SD_F_EQ_ENABLED 0x00000800 /* EQ enabled */
154 #define SD_F_EQ_BYPASSED 0x00001000 /* EQ bypassed */
155 #define SD_F_EQ_PC 0x00002000 /* EQ per-channel */
157 #define SD_F_EQ_DEFAULT (SD_F_EQ | SD_F_EQ_ENABLED)
158 #define SD_F_EQ_MASK (SD_F_EQ | SD_F_EQ_ENABLED | \
159 SD_F_EQ_BYPASSED | SD_F_EQ_PC)
161 #define SD_F_PRIO_RD 0x10000000
162 #define SD_F_PRIO_WR 0x20000000
163 #define SD_F_PRIO_SET (SD_F_PRIO_RD | SD_F_PRIO_WR)
164 #define SD_F_DIR_SET 0x40000000
165 #define SD_F_TRANSIENT 0xf0000000
167 #define SD_F_BITS "\020" \
186 #define PCM_ALIVE(x) ((x) != NULL && (x)->lock != NULL && \
187 !((x)->flags & SD_F_DYING))
188 #define PCM_REGISTERED(x) (PCM_ALIVE(x) && \
189 ((x)->flags & SD_F_REGISTERED))
191 /* many variables should be reduced to a range. Here define a macro */
192 #define RANGE(var, low, high) (var) = \
193 (((var)<(low))? (low) : ((var)>(high))? (high) : (var))
194 #define DSP_BUFFSIZE (8192)
196 /* make figuring out what a format is easier. got AFMT_STEREO already */
197 #define AFMT_32BIT (AFMT_S32_LE | AFMT_S32_BE | AFMT_U32_LE | AFMT_U32_BE)
198 #define AFMT_24BIT (AFMT_S24_LE | AFMT_S24_BE | AFMT_U24_LE | AFMT_U24_BE)
199 #define AFMT_16BIT (AFMT_S16_LE | AFMT_S16_BE | AFMT_U16_LE | AFMT_U16_BE)
200 #define AFMT_G711 (AFMT_MU_LAW | AFMT_A_LAW)
201 #define AFMT_8BIT (AFMT_G711 | AFMT_U8 | AFMT_S8)
202 #define AFMT_SIGNED (AFMT_S32_LE | AFMT_S32_BE | AFMT_S24_LE | AFMT_S24_BE | \
203 AFMT_S16_LE | AFMT_S16_BE | AFMT_S8)
204 #define AFMT_BIGENDIAN (AFMT_S32_BE | AFMT_U32_BE | AFMT_S24_BE | AFMT_U24_BE | \
205 AFMT_S16_BE | AFMT_U16_BE)
207 #define AFMT_CONVERTIBLE (AFMT_8BIT | AFMT_16BIT | AFMT_24BIT | \
210 /* Supported vchan mixing formats */
211 #define AFMT_VCHAN (AFMT_CONVERTIBLE & ~AFMT_G711)
213 #define AFMT_PASSTHROUGH AFMT_AC3
214 #define AFMT_PASSTHROUGH_RATE 48000
215 #define AFMT_PASSTHROUGH_CHANNEL 2
216 #define AFMT_PASSTHROUGH_EXTCHANNEL 0
219 * We're simply using unused, contiguous bits from various AFMT_ definitions.
222 #define AFMT_ENCODING_MASK 0xf00fffff
223 #define AFMT_CHANNEL_MASK 0x01f00000
224 #define AFMT_CHANNEL_SHIFT 20
225 #define AFMT_EXTCHANNEL_MASK 0x0e000000
226 #define AFMT_EXTCHANNEL_SHIFT 25
228 #define AFMT_ENCODING(v) ((v) & AFMT_ENCODING_MASK)
230 #define AFMT_EXTCHANNEL(v) (((v) & AFMT_EXTCHANNEL_MASK) >> \
231 AFMT_EXTCHANNEL_SHIFT)
233 #define AFMT_CHANNEL(v) (((v) & AFMT_CHANNEL_MASK) >> \
236 #define AFMT_BIT(v) (((v) & AFMT_32BIT) ? 32 : \
237 (((v) & AFMT_24BIT) ? 24 : \
238 ((((v) & AFMT_16BIT) || \
239 ((v) & AFMT_PASSTHROUGH)) ? 16 : 8)))
241 #define AFMT_BPS(v) (AFMT_BIT(v) >> 3)
242 #define AFMT_ALIGN(v) (AFMT_BPS(v) * AFMT_CHANNEL(v))
244 #define SND_FORMAT(f, c, e) (AFMT_ENCODING(f) | \
245 (((c) << AFMT_CHANNEL_SHIFT) & \
246 AFMT_CHANNEL_MASK) | \
247 (((e) << AFMT_EXTCHANNEL_SHIFT) & \
248 AFMT_EXTCHANNEL_MASK))
250 #define AFMT_U8_NE AFMT_U8
251 #define AFMT_S8_NE AFMT_S8
253 #define AFMT_SIGNED_NE (AFMT_S8_NE | AFMT_S16_NE | AFMT_S24_NE | AFMT_S32_NE)
255 #define AFMT_NE (AFMT_SIGNED_NE | AFMT_U8_NE | AFMT_U16_NE | \
256 AFMT_U24_NE | AFMT_U32_NE)
259 * Minor numbers for the sound driver.
261 * Unfortunately Creative called the codec chip of SB as a DSP. For this
262 * reason the /dev/dsp is reserved for digitized audio use. There is a
263 * device for true DSP processors but it will be called something else.
264 * In v3.0 it's /dev/sndproc but this could be a temporary solution.
267 #define SND_DEV_CTL 0 /* Control port /dev/mixer */
268 #define SND_DEV_SEQ 1 /* Sequencer /dev/sequencer */
269 #define SND_DEV_MIDIN 2 /* Raw midi access */
270 #define SND_DEV_DSP 3 /* Digitized voice /dev/dsp */
271 #define SND_DEV_AUDIO 4 /* Sparc compatible /dev/audio */
272 #define SND_DEV_DSP16 5 /* Like /dev/dsp but 16 bits/sample */
273 #define SND_DEV_STATUS 6 /* /dev/sndstat */
274 /* #7 not in use now. */
275 #define SND_DEV_SEQ2 8 /* /dev/sequencer, level 2 interface */
276 #define SND_DEV_SNDPROC 9 /* /dev/sndproc for programmable devices */
277 #define SND_DEV_PSS SND_DEV_SNDPROC /* ? */
278 #define SND_DEV_NORESET 10
280 #define SND_DEV_DSPHW_PLAY 11 /* specific playback channel */
281 #define SND_DEV_DSPHW_VPLAY 12 /* specific virtual playback channel */
282 #define SND_DEV_DSPHW_REC 13 /* specific record channel */
283 #define SND_DEV_DSPHW_VREC 14 /* specific virtual record channel */
285 #define SND_DEV_DSPHW_CD 15 /* s16le/stereo 44100Hz CD */
288 * OSSv4 compatible device. For now, it serve no purpose and
289 * the cloning itself will forward the request to ordinary /dev/dsp
292 #define SND_DEV_DSP_MMAP 16 /* /dev/dsp_mmap */
293 #define SND_DEV_DSP_AC3 17 /* /dev/dsp_ac3 */
294 #define SND_DEV_DSP_MULTICH 18 /* /dev/dsp_multich */
295 #define SND_DEV_DSP_SPDIFOUT 19 /* /dev/dsp_spdifout */
296 #define SND_DEV_DSP_SPDIFIN 20 /* /dev/dsp_spdifin */
298 #define SND_DEV_LAST SND_DEV_DSP_SPDIFIN
299 #define SND_DEV_MAX PCMMAXDEV
301 #define DSP_DEFAULT_SPEED 8000
306 extern int pcm_veto_load;
308 extern int snd_maxautovchans;
309 extern int snd_verbose;
310 extern devclass_t pcm_devclass;
311 extern struct unrhdr *pcmsg_unrhdr;
314 * some macros for debugging purposes
315 * DDB/DEB to enable/disable debugging stuff
316 * BVDDB to enable debugging when bootverbose
318 #define BVDDB(x) if (bootverbose) x
324 SYSCTL_DECL(_hw_snd);
326 int pcm_setvchans(struct snddev_info *d, int direction, int newcnt, int num);
327 int pcm_chnalloc(struct snddev_info *d, struct pcm_channel **ch, int direction,
328 pid_t pid, char *comm, int devunit);
329 int pcm_chnrelease(struct pcm_channel *c);
330 int pcm_chnref(struct pcm_channel *c, int ref);
331 int pcm_inprog(struct snddev_info *d, int delta);
333 struct pcm_channel *pcm_chn_create(struct snddev_info *d, struct pcm_channel *parent, kobj_class_t cls, int dir, int num, void *devinfo);
334 int pcm_chn_destroy(struct pcm_channel *ch);
335 int pcm_chn_add(struct snddev_info *d, struct pcm_channel *ch);
336 int pcm_chn_remove(struct snddev_info *d, struct pcm_channel *ch);
338 int pcm_addchan(device_t dev, int dir, kobj_class_t cls, void *devinfo);
339 unsigned int pcm_getbuffersize(device_t dev, unsigned int minbufsz, unsigned int deflt, unsigned int maxbufsz);
340 int pcm_register(device_t dev, void *devinfo, int numplay, int numrec);
341 int pcm_unregister(device_t dev);
342 int pcm_setstatus(device_t dev, char *str);
343 u_int32_t pcm_getflags(device_t dev);
344 void pcm_setflags(device_t dev, u_int32_t val);
345 void *pcm_getdevinfo(device_t dev);
348 int snd_setup_intr(device_t dev, struct resource *res, int flags,
349 driver_intr_t hand, void *param, void **cookiep);
351 void *snd_mtxcreate(const char *desc, const char *type);
352 void snd_mtxfree(void *m);
353 void snd_mtxassert(void *m);
354 #define snd_mtxlock(m) mtx_lock(m)
355 #define snd_mtxunlock(m) mtx_unlock(m)
357 typedef int (*sndstat_handler)(struct sbuf *s, device_t dev, int verbose);
358 int sndstat_acquire(struct thread *td);
359 int sndstat_release(struct thread *td);
360 int sndstat_register(device_t dev, char *str, sndstat_handler handler);
361 int sndstat_registerfile(char *str);
362 int sndstat_unregister(device_t dev);
363 int sndstat_unregisterfile(char *str);
365 #define SND_DECLARE_FILE(version) \
366 _SND_DECLARE_FILE(__LINE__, version)
368 #define _SND_DECLARE_FILE(uniq, version) \
369 __SND_DECLARE_FILE(uniq, version)
371 #define __SND_DECLARE_FILE(uniq, version) \
372 static char sndstat_vinfo[] = version; \
373 SYSINIT(sdf_ ## uniq, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, sndstat_registerfile, sndstat_vinfo); \
374 SYSUNINIT(sdf_ ## uniq, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, sndstat_unregisterfile, sndstat_vinfo);
376 /* usage of flags in device config entry (config file) */
377 #define DV_F_DRQ_MASK 0x00000007 /* mask for secondary drq */
378 #define DV_F_DUAL_DMA 0x00000010 /* set to use secondary dma channel */
380 /* ought to be made obsolete but still used by mss */
381 #define DV_F_DEV_MASK 0x0000ff00 /* force device type/class */
382 #define DV_F_DEV_SHIFT 8 /* force device type/class */
385 * this is rather kludgey- we need to duplicate these struct def'ns from sound.c
386 * so that the macro versions of pcm_{,un}lock can dereference them.
387 * we also have to do this now makedev() has gone away.
393 SLIST_HEAD(, pcm_channel) head;
395 SLIST_HEAD(, pcm_channel) head;
398 SLIST_HEAD(, pcm_channel) head;
402 TAILQ_HEAD(dsp_cdevinfo_linkhead, dsp_cdevinfo) dsp_cdevinfo_pool;
403 struct snd_clone *clones;
404 unsigned devcount, playcount, reccount, pvchancount, rvchancount ;
410 char status[SND_STATUSLEN];
412 struct cdev *mixer_dev;
413 uint32_t pvchanrate, pvchanformat;
414 uint32_t rvchanrate, rvchanformat;
416 struct sysctl_ctx_list play_sysctl_ctx, rec_sysctl_ctx;
417 struct sysctl_oid *play_sysctl_tree, *rec_sysctl_tree;
421 void sound_oss_sysinfo(oss_sysinfo *);
422 int sound_oss_card_info(oss_card_info *);
424 #define PCM_LOCKOWNED(d) mtx_owned((d)->lock)
425 #define PCM_LOCK(d) mtx_lock((d)->lock)
426 #define PCM_UNLOCK(d) mtx_unlock((d)->lock)
427 #define PCM_TRYLOCK(d) mtx_trylock((d)->lock)
428 #define PCM_LOCKASSERT(d) mtx_assert((d)->lock, MA_OWNED)
429 #define PCM_UNLOCKASSERT(d) mtx_assert((d)->lock, MA_NOTOWNED)
432 * For PCM_[WAIT | ACQUIRE | RELEASE], be sure to surround these
433 * with PCM_LOCK/UNLOCK() sequence, or I'll come to gnaw upon you!
435 #ifdef SND_DIAGNOSTIC
436 #define PCM_WAIT(x) do { \
437 if (!PCM_LOCKOWNED(x)) \
438 panic("%s(%d): [PCM WAIT] Mutex not owned!", \
439 __func__, __LINE__); \
440 while ((x)->flags & SD_F_BUSY) { \
441 if (snd_verbose > 3) \
442 device_printf((x)->dev, \
443 "%s(%d): [PCM WAIT] calling cv_wait().\n", \
444 __func__, __LINE__); \
445 cv_wait(&(x)->cv, (x)->lock); \
449 #define PCM_ACQUIRE(x) do { \
450 if (!PCM_LOCKOWNED(x)) \
451 panic("%s(%d): [PCM ACQUIRE] Mutex not owned!", \
452 __func__, __LINE__); \
453 if ((x)->flags & SD_F_BUSY) \
454 panic("%s(%d): [PCM ACQUIRE] " \
455 "Trying to acquire BUSY cv!", __func__, __LINE__); \
456 (x)->flags |= SD_F_BUSY; \
459 #define PCM_RELEASE(x) do { \
460 if (!PCM_LOCKOWNED(x)) \
461 panic("%s(%d): [PCM RELEASE] Mutex not owned!", \
462 __func__, __LINE__); \
463 if ((x)->flags & SD_F_BUSY) { \
464 (x)->flags &= ~SD_F_BUSY; \
465 if ((x)->cv.cv_waiters != 0) { \
466 if ((x)->cv.cv_waiters > 1 && snd_verbose > 3) \
467 device_printf((x)->dev, \
468 "%s(%d): [PCM RELEASE] " \
469 "cv_waiters=%d > 1!\n", \
470 __func__, __LINE__, \
471 (x)->cv.cv_waiters); \
472 cv_broadcast(&(x)->cv); \
475 panic("%s(%d): [PCM RELEASE] Releasing non-BUSY cv!", \
476 __func__, __LINE__); \
479 /* Quick version, for shorter path. */
480 #define PCM_ACQUIRE_QUICK(x) do { \
481 if (PCM_LOCKOWNED(x)) \
482 panic("%s(%d): [PCM ACQUIRE QUICK] Mutex owned!", \
483 __func__, __LINE__); \
490 #define PCM_RELEASE_QUICK(x) do { \
491 if (PCM_LOCKOWNED(x)) \
492 panic("%s(%d): [PCM RELEASE QUICK] Mutex owned!", \
493 __func__, __LINE__); \
499 #define PCM_BUSYASSERT(x) do { \
500 if (!((x) != NULL && ((x)->flags & SD_F_BUSY))) \
501 panic("%s(%d): [PCM BUSYASSERT] " \
502 "Failed, snddev_info=%p", __func__, __LINE__, x); \
505 #define PCM_GIANT_ENTER(x) do { \
506 int _pcm_giant = 0; \
507 if (PCM_LOCKOWNED(x)) \
508 panic("%s(%d): [GIANT ENTER] PCM lock owned!", \
509 __func__, __LINE__); \
510 if (mtx_owned(&Giant) != 0 && snd_verbose > 3) \
511 device_printf((x)->dev, \
512 "%s(%d): [GIANT ENTER] Giant owned!\n", \
513 __func__, __LINE__); \
514 if (!((x)->flags & SD_F_MPSAFE) && mtx_owned(&Giant) == 0) \
520 #define PCM_GIANT_EXIT(x) do { \
521 if (PCM_LOCKOWNED(x)) \
522 panic("%s(%d): [GIANT EXIT] PCM lock owned!", \
523 __func__, __LINE__); \
524 if (!(_pcm_giant == 0 || _pcm_giant == 1)) \
525 panic("%s(%d): [GIANT EXIT] _pcm_giant screwed!", \
526 __func__, __LINE__); \
527 if ((x)->flags & SD_F_MPSAFE) { \
528 if (_pcm_giant == 1) \
529 panic("%s(%d): [GIANT EXIT] MPSAFE Giant?", \
530 __func__, __LINE__); \
531 if (mtx_owned(&Giant) != 0 && snd_verbose > 3) \
532 device_printf((x)->dev, \
533 "%s(%d): [GIANT EXIT] Giant owned!\n", \
534 __func__, __LINE__); \
536 if (_pcm_giant != 0) { \
537 if (mtx_owned(&Giant) == 0) \
538 panic("%s(%d): [GIANT EXIT] Giant not owned!", \
539 __func__, __LINE__); \
541 mtx_unlock(&Giant); \
544 #else /* SND_DIAGNOSTIC */
545 #define PCM_WAIT(x) do { \
547 while ((x)->flags & SD_F_BUSY) \
548 cv_wait(&(x)->cv, (x)->lock); \
551 #define PCM_ACQUIRE(x) do { \
553 KASSERT(!((x)->flags & SD_F_BUSY), \
554 ("%s(%d): [PCM ACQUIRE] Trying to acquire BUSY cv!", \
555 __func__, __LINE__)); \
556 (x)->flags |= SD_F_BUSY; \
559 #define PCM_RELEASE(x) do { \
561 KASSERT((x)->flags & SD_F_BUSY, \
562 ("%s(%d): [PCM RELEASE] Releasing non-BUSY cv!", \
563 __func__, __LINE__)); \
564 (x)->flags &= ~SD_F_BUSY; \
565 if ((x)->cv.cv_waiters != 0) \
566 cv_broadcast(&(x)->cv); \
569 /* Quick version, for shorter path. */
570 #define PCM_ACQUIRE_QUICK(x) do { \
571 PCM_UNLOCKASSERT(x); \
578 #define PCM_RELEASE_QUICK(x) do { \
579 PCM_UNLOCKASSERT(x); \
585 #define PCM_BUSYASSERT(x) KASSERT(x != NULL && \
586 ((x)->flags & SD_F_BUSY), \
587 ("%s(%d): [PCM BUSYASSERT] " \
588 "Failed, snddev_info=%p", \
589 __func__, __LINE__, x))
591 #define PCM_GIANT_ENTER(x) do { \
592 int _pcm_giant = 0; \
593 PCM_UNLOCKASSERT(x); \
594 if (!((x)->flags & SD_F_MPSAFE) && mtx_owned(&Giant) == 0) \
600 #define PCM_GIANT_EXIT(x) do { \
601 PCM_UNLOCKASSERT(x); \
602 KASSERT(_pcm_giant == 0 || _pcm_giant == 1, \
603 ("%s(%d): [GIANT EXIT] _pcm_giant screwed!", \
604 __func__, __LINE__)); \
605 KASSERT(!((x)->flags & SD_F_MPSAFE) || \
606 (((x)->flags & SD_F_MPSAFE) && _pcm_giant == 0), \
607 ("%s(%d): [GIANT EXIT] MPSAFE Giant?", \
608 __func__, __LINE__)); \
609 if (_pcm_giant != 0) { \
610 mtx_assert(&Giant, MA_OWNED); \
612 mtx_unlock(&Giant); \
615 #endif /* !SND_DIAGNOSTIC */
617 #define PCM_GIANT_LEAVE(x) \
622 #define PCM_KLDSTRING(a) ("kld " # a)
624 #define PCM_KLDSTRING(a) ""