2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2005-2009 Ariff Abdullah <ariff@FreeBSD.org>
5 * Copyright (c) 1999 Cameron Grant <cg@FreeBSD.org>
6 * Copyright (c) 1995 Hannu Savolainen
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * first, include kernel header files.
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/eventhandler.h>
44 #include <sys/ioccom.h>
45 #include <sys/filio.h>
46 #include <sys/sockio.h>
47 #include <sys/fcntl.h>
48 #include <sys/selinfo.h>
50 #include <sys/kernel.h> /* for DATA_SET */
51 #include <sys/module.h>
55 #include <sys/syslog.h>
56 #include <sys/errno.h>
57 #include <sys/malloc.h>
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 #define PCMMINOR(x) (x)
126 * By design, limit possible channels for each direction.
128 #define SND_MAXHWCHAN 256
129 #define SND_MAXVCHANS SND_MAXHWCHAN
131 #define SD_F_SIMPLEX 0x00000001
132 #define SD_F_AUTOVCHAN 0x00000002
133 #define SD_F_SOFTPCMVOL 0x00000004
134 #define SD_F_DYING 0x00000008
135 #define SD_F_DETACHING 0x00000010
136 #define SD_F_BUSY 0x00000020
137 #define SD_F_MPSAFE 0x00000040
138 #define SD_F_REGISTERED 0x00000080
139 #define SD_F_BITPERFECT 0x00000100
140 #define SD_F_VPC 0x00000200 /* volume-per-channel */
141 #define SD_F_EQ 0x00000400 /* EQ */
142 #define SD_F_EQ_ENABLED 0x00000800 /* EQ enabled */
143 #define SD_F_EQ_BYPASSED 0x00001000 /* EQ bypassed */
144 #define SD_F_EQ_PC 0x00002000 /* EQ per-channel */
146 #define SD_F_EQ_DEFAULT (SD_F_EQ | SD_F_EQ_ENABLED)
147 #define SD_F_EQ_MASK (SD_F_EQ | SD_F_EQ_ENABLED | \
148 SD_F_EQ_BYPASSED | SD_F_EQ_PC)
150 #define SD_F_PRIO_RD 0x10000000
151 #define SD_F_PRIO_WR 0x20000000
152 #define SD_F_PRIO_SET (SD_F_PRIO_RD | SD_F_PRIO_WR)
153 #define SD_F_DIR_SET 0x40000000
154 #define SD_F_TRANSIENT 0xf0000000
156 #define SD_F_BITS "\020" \
175 #define PCM_ALIVE(x) ((x) != NULL && (x)->lock != NULL && \
176 !((x)->flags & SD_F_DYING))
177 #define PCM_REGISTERED(x) (PCM_ALIVE(x) && \
178 ((x)->flags & SD_F_REGISTERED))
180 #define PCM_DETACHING(x) ((x)->flags & SD_F_DETACHING)
182 /* many variables should be reduced to a range. Here define a macro */
183 #define RANGE(var, low, high) (var) = \
184 (((var)<(low))? (low) : ((var)>(high))? (high) : (var))
185 #define DSP_BUFFSIZE (8192)
187 /* make figuring out what a format is easier. got AFMT_STEREO already */
188 #define AFMT_32BIT (AFMT_S32_LE | AFMT_S32_BE | AFMT_U32_LE | AFMT_U32_BE)
189 #define AFMT_24BIT (AFMT_S24_LE | AFMT_S24_BE | AFMT_U24_LE | AFMT_U24_BE)
190 #define AFMT_16BIT (AFMT_S16_LE | AFMT_S16_BE | AFMT_U16_LE | AFMT_U16_BE)
191 #define AFMT_G711 (AFMT_MU_LAW | AFMT_A_LAW)
192 #define AFMT_8BIT (AFMT_G711 | AFMT_U8 | AFMT_S8)
193 #define AFMT_SIGNED (AFMT_S32_LE | AFMT_S32_BE | AFMT_S24_LE | AFMT_S24_BE | \
194 AFMT_S16_LE | AFMT_S16_BE | AFMT_S8)
195 #define AFMT_BIGENDIAN (AFMT_S32_BE | AFMT_U32_BE | AFMT_S24_BE | AFMT_U24_BE | \
196 AFMT_S16_BE | AFMT_U16_BE)
198 #define AFMT_CONVERTIBLE (AFMT_8BIT | AFMT_16BIT | AFMT_24BIT | \
201 /* Supported vchan mixing formats */
202 #define AFMT_VCHAN (AFMT_CONVERTIBLE & ~AFMT_G711)
204 #define AFMT_PASSTHROUGH AFMT_AC3
205 #define AFMT_PASSTHROUGH_RATE 48000
206 #define AFMT_PASSTHROUGH_CHANNEL 2
207 #define AFMT_PASSTHROUGH_EXTCHANNEL 0
210 * We're simply using unused, contiguous bits from various AFMT_ definitions.
213 #define AFMT_ENCODING_MASK 0xf00fffff
214 #define AFMT_CHANNEL_MASK 0x07f00000
215 #define AFMT_CHANNEL_SHIFT 20
216 #define AFMT_CHANNEL_MAX 0x7f
217 #define AFMT_EXTCHANNEL_MASK 0x08000000
218 #define AFMT_EXTCHANNEL_SHIFT 27
219 #define AFMT_EXTCHANNEL_MAX 1
221 #define AFMT_ENCODING(v) ((v) & AFMT_ENCODING_MASK)
223 #define AFMT_EXTCHANNEL(v) (((v) & AFMT_EXTCHANNEL_MASK) >> \
224 AFMT_EXTCHANNEL_SHIFT)
226 #define AFMT_CHANNEL(v) (((v) & AFMT_CHANNEL_MASK) >> \
229 #define AFMT_BIT(v) (((v) & AFMT_32BIT) ? 32 : \
230 (((v) & AFMT_24BIT) ? 24 : \
231 ((((v) & AFMT_16BIT) || \
232 ((v) & AFMT_PASSTHROUGH)) ? 16 : 8)))
234 #define AFMT_BPS(v) (AFMT_BIT(v) >> 3)
235 #define AFMT_ALIGN(v) (AFMT_BPS(v) * AFMT_CHANNEL(v))
237 #define SND_FORMAT(f, c, e) (AFMT_ENCODING(f) | \
238 (((c) << AFMT_CHANNEL_SHIFT) & \
239 AFMT_CHANNEL_MASK) | \
240 (((e) << AFMT_EXTCHANNEL_SHIFT) & \
241 AFMT_EXTCHANNEL_MASK))
243 #define AFMT_U8_NE AFMT_U8
244 #define AFMT_S8_NE AFMT_S8
246 #define AFMT_SIGNED_NE (AFMT_S8_NE | AFMT_S16_NE | AFMT_S24_NE | AFMT_S32_NE)
248 #define AFMT_NE (AFMT_SIGNED_NE | AFMT_U8_NE | AFMT_U16_NE | \
249 AFMT_U24_NE | AFMT_U32_NE)
252 * Minor numbers for the sound driver.
254 * Unfortunately Creative called the codec chip of SB as a DSP. For this
255 * reason the /dev/dsp is reserved for digitized audio use. There is a
256 * device for true DSP processors but it will be called something else.
257 * In v3.0 it's /dev/sndproc but this could be a temporary solution.
260 #define SND_DEV_CTL 0 /* Control port /dev/mixer */
261 #define SND_DEV_SEQ 1 /* Sequencer /dev/sequencer */
262 #define SND_DEV_MIDIN 2 /* Raw midi access */
263 #define SND_DEV_DSP 3 /* Digitized voice /dev/dsp */
264 #define SND_DEV_AUDIO 4 /* Sparc compatible /dev/audio */
265 #define SND_DEV_DSP16 5 /* Like /dev/dsp but 16 bits/sample */
266 #define SND_DEV_STATUS 6 /* /dev/sndstat */
267 /* #7 not in use now. */
268 #define SND_DEV_SEQ2 8 /* /dev/sequencer, level 2 interface */
269 #define SND_DEV_SNDPROC 9 /* /dev/sndproc for programmable devices */
270 #define SND_DEV_PSS SND_DEV_SNDPROC /* ? */
271 #define SND_DEV_NORESET 10
273 #define SND_DEV_DSPHW_PLAY 11 /* specific playback channel */
274 #define SND_DEV_DSPHW_VPLAY 12 /* specific virtual playback channel */
275 #define SND_DEV_DSPHW_REC 13 /* specific record channel */
276 #define SND_DEV_DSPHW_VREC 14 /* specific virtual record channel */
278 #define SND_DEV_DSPHW_CD 15 /* s16le/stereo 44100Hz CD */
281 * OSSv4 compatible device. For now, it serve no purpose and
282 * the cloning itself will forward the request to ordinary /dev/dsp
285 #define SND_DEV_DSP_MMAP 16 /* /dev/dsp_mmap */
286 #define SND_DEV_DSP_AC3 17 /* /dev/dsp_ac3 */
287 #define SND_DEV_DSP_MULTICH 18 /* /dev/dsp_multich */
288 #define SND_DEV_DSP_SPDIFOUT 19 /* /dev/dsp_spdifout */
289 #define SND_DEV_DSP_SPDIFIN 20 /* /dev/dsp_spdifin */
291 #define SND_DEV_LAST SND_DEV_DSP_SPDIFIN
292 #define SND_DEV_MAX PCMMAXDEV
294 #define DSP_DEFAULT_SPEED 8000
299 extern int pcm_veto_load;
301 extern int snd_maxautovchans;
302 extern int snd_verbose;
303 extern devclass_t pcm_devclass;
304 extern struct unrhdr *pcmsg_unrhdr;
307 * some macros for debugging purposes
308 * DDB/DEB to enable/disable debugging stuff
309 * BVDDB to enable debugging when bootverbose
311 #define BVDDB(x) if (bootverbose) x
317 SYSCTL_DECL(_hw_snd);
319 int pcm_setvchans(struct snddev_info *d, int direction, int newcnt, int num);
320 int pcm_chnalloc(struct snddev_info *d, struct pcm_channel **ch, int direction,
321 pid_t pid, char *comm, int devunit);
322 int pcm_chnrelease(struct pcm_channel *c);
323 int pcm_chnref(struct pcm_channel *c, int ref);
324 int pcm_inprog(struct snddev_info *d, int delta);
326 struct pcm_channel *pcm_chn_create(struct snddev_info *d, struct pcm_channel *parent, kobj_class_t cls, int dir, int num, void *devinfo);
327 int pcm_chn_destroy(struct pcm_channel *ch);
328 int pcm_chn_add(struct snddev_info *d, struct pcm_channel *ch);
329 int pcm_chn_remove(struct snddev_info *d, struct pcm_channel *ch);
331 int pcm_addchan(device_t dev, int dir, kobj_class_t cls, void *devinfo);
332 unsigned int pcm_getbuffersize(device_t dev, unsigned int minbufsz, unsigned int deflt, unsigned int maxbufsz);
333 int pcm_register(device_t dev, void *devinfo, int numplay, int numrec);
334 int pcm_unregister(device_t dev);
335 int pcm_setstatus(device_t dev, char *str);
336 u_int32_t pcm_getflags(device_t dev);
337 void pcm_setflags(device_t dev, u_int32_t val);
338 void *pcm_getdevinfo(device_t dev);
340 int snd_setup_intr(device_t dev, struct resource *res, int flags,
341 driver_intr_t hand, void *param, void **cookiep);
343 void *snd_mtxcreate(const char *desc, const char *type);
344 void snd_mtxfree(void *m);
345 void snd_mtxassert(void *m);
346 #define snd_mtxlock(m) mtx_lock(m)
347 #define snd_mtxunlock(m) mtx_unlock(m)
349 typedef int (*sndstat_handler)(struct sbuf *s, device_t dev, int verbose);
350 int sndstat_register(device_t dev, char *str, sndstat_handler handler);
351 int sndstat_registerfile(char *str);
352 int sndstat_unregister(device_t dev);
353 int sndstat_unregisterfile(char *str);
355 #define SND_DECLARE_FILE(version) \
356 _SND_DECLARE_FILE(__LINE__, version)
358 #define _SND_DECLARE_FILE(uniq, version) \
359 __SND_DECLARE_FILE(uniq, version)
361 #define __SND_DECLARE_FILE(uniq, version) \
362 static char sndstat_vinfo[] = version; \
363 SYSINIT(sdf_ ## uniq, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, sndstat_registerfile, sndstat_vinfo); \
364 SYSUNINIT(sdf_ ## uniq, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, sndstat_unregisterfile, sndstat_vinfo);
366 /* usage of flags in device config entry (config file) */
367 #define DV_F_DRQ_MASK 0x00000007 /* mask for secondary drq */
368 #define DV_F_DUAL_DMA 0x00000010 /* set to use secondary dma channel */
370 /* ought to be made obsolete but still used by mss */
371 #define DV_F_DEV_MASK 0x0000ff00 /* force device type/class */
372 #define DV_F_DEV_SHIFT 8 /* force device type/class */
375 * this is rather kludgey- we need to duplicate these struct def'ns from sound.c
376 * so that the macro versions of pcm_{,un}lock can dereference them.
377 * we also have to do this now makedev() has gone away.
383 SLIST_HEAD(, pcm_channel) head;
385 SLIST_HEAD(, pcm_channel) head;
388 SLIST_HEAD(, pcm_channel) head;
392 TAILQ_HEAD(dsp_cdevinfo_linkhead, dsp_cdevinfo) dsp_cdevinfo_pool;
393 struct snd_clone *clones;
394 unsigned devcount, playcount, reccount, pvchancount, rvchancount ;
400 char status[SND_STATUSLEN];
402 struct cdev *mixer_dev;
403 uint32_t pvchanrate, pvchanformat;
404 uint32_t rvchanrate, rvchanformat;
406 struct sysctl_ctx_list play_sysctl_ctx, rec_sysctl_ctx;
407 struct sysctl_oid *play_sysctl_tree, *rec_sysctl_tree;
411 void sound_oss_sysinfo(oss_sysinfo *);
412 int sound_oss_card_info(oss_card_info *);
414 #define PCM_LOCKOWNED(d) mtx_owned((d)->lock)
415 #define PCM_LOCK(d) mtx_lock((d)->lock)
416 #define PCM_UNLOCK(d) mtx_unlock((d)->lock)
417 #define PCM_TRYLOCK(d) mtx_trylock((d)->lock)
418 #define PCM_LOCKASSERT(d) mtx_assert((d)->lock, MA_OWNED)
419 #define PCM_UNLOCKASSERT(d) mtx_assert((d)->lock, MA_NOTOWNED)
422 * For PCM_[WAIT | ACQUIRE | RELEASE], be sure to surround these
423 * with PCM_LOCK/UNLOCK() sequence, or I'll come to gnaw upon you!
425 #ifdef SND_DIAGNOSTIC
426 #define PCM_WAIT(x) do { \
427 if (!PCM_LOCKOWNED(x)) \
428 panic("%s(%d): [PCM WAIT] Mutex not owned!", \
429 __func__, __LINE__); \
430 while ((x)->flags & SD_F_BUSY) { \
431 if (snd_verbose > 3) \
432 device_printf((x)->dev, \
433 "%s(%d): [PCM WAIT] calling cv_wait().\n", \
434 __func__, __LINE__); \
435 cv_wait(&(x)->cv, (x)->lock); \
439 #define PCM_ACQUIRE(x) do { \
440 if (!PCM_LOCKOWNED(x)) \
441 panic("%s(%d): [PCM ACQUIRE] Mutex not owned!", \
442 __func__, __LINE__); \
443 if ((x)->flags & SD_F_BUSY) \
444 panic("%s(%d): [PCM ACQUIRE] " \
445 "Trying to acquire BUSY cv!", __func__, __LINE__); \
446 (x)->flags |= SD_F_BUSY; \
449 #define PCM_RELEASE(x) do { \
450 if (!PCM_LOCKOWNED(x)) \
451 panic("%s(%d): [PCM RELEASE] Mutex not owned!", \
452 __func__, __LINE__); \
453 if ((x)->flags & SD_F_BUSY) { \
454 (x)->flags &= ~SD_F_BUSY; \
455 if ((x)->cv.cv_waiters != 0) { \
456 if ((x)->cv.cv_waiters > 1 && snd_verbose > 3) \
457 device_printf((x)->dev, \
458 "%s(%d): [PCM RELEASE] " \
459 "cv_waiters=%d > 1!\n", \
460 __func__, __LINE__, \
461 (x)->cv.cv_waiters); \
462 cv_broadcast(&(x)->cv); \
465 panic("%s(%d): [PCM RELEASE] Releasing non-BUSY cv!", \
466 __func__, __LINE__); \
469 /* Quick version, for shorter path. */
470 #define PCM_ACQUIRE_QUICK(x) do { \
471 if (PCM_LOCKOWNED(x)) \
472 panic("%s(%d): [PCM ACQUIRE QUICK] Mutex owned!", \
473 __func__, __LINE__); \
480 #define PCM_RELEASE_QUICK(x) do { \
481 if (PCM_LOCKOWNED(x)) \
482 panic("%s(%d): [PCM RELEASE QUICK] Mutex owned!", \
483 __func__, __LINE__); \
489 #define PCM_BUSYASSERT(x) do { \
490 if (!((x) != NULL && ((x)->flags & SD_F_BUSY))) \
491 panic("%s(%d): [PCM BUSYASSERT] " \
492 "Failed, snddev_info=%p", __func__, __LINE__, x); \
495 #define PCM_GIANT_ENTER(x) do { \
496 int _pcm_giant = 0; \
497 if (PCM_LOCKOWNED(x)) \
498 panic("%s(%d): [GIANT ENTER] PCM lock owned!", \
499 __func__, __LINE__); \
500 if (mtx_owned(&Giant) != 0 && snd_verbose > 3) \
501 device_printf((x)->dev, \
502 "%s(%d): [GIANT ENTER] Giant owned!\n", \
503 __func__, __LINE__); \
504 if (!((x)->flags & SD_F_MPSAFE) && mtx_owned(&Giant) == 0) \
510 #define PCM_GIANT_EXIT(x) do { \
511 if (PCM_LOCKOWNED(x)) \
512 panic("%s(%d): [GIANT EXIT] PCM lock owned!", \
513 __func__, __LINE__); \
514 if (!(_pcm_giant == 0 || _pcm_giant == 1)) \
515 panic("%s(%d): [GIANT EXIT] _pcm_giant screwed!", \
516 __func__, __LINE__); \
517 if ((x)->flags & SD_F_MPSAFE) { \
518 if (_pcm_giant == 1) \
519 panic("%s(%d): [GIANT EXIT] MPSAFE Giant?", \
520 __func__, __LINE__); \
521 if (mtx_owned(&Giant) != 0 && snd_verbose > 3) \
522 device_printf((x)->dev, \
523 "%s(%d): [GIANT EXIT] Giant owned!\n", \
524 __func__, __LINE__); \
526 if (_pcm_giant != 0) { \
527 if (mtx_owned(&Giant) == 0) \
528 panic("%s(%d): [GIANT EXIT] Giant not owned!", \
529 __func__, __LINE__); \
531 mtx_unlock(&Giant); \
534 #else /* SND_DIAGNOSTIC */
535 #define PCM_WAIT(x) do { \
537 while ((x)->flags & SD_F_BUSY) \
538 cv_wait(&(x)->cv, (x)->lock); \
541 #define PCM_ACQUIRE(x) do { \
543 KASSERT(!((x)->flags & SD_F_BUSY), \
544 ("%s(%d): [PCM ACQUIRE] Trying to acquire BUSY cv!", \
545 __func__, __LINE__)); \
546 (x)->flags |= SD_F_BUSY; \
549 #define PCM_RELEASE(x) do { \
551 KASSERT((x)->flags & SD_F_BUSY, \
552 ("%s(%d): [PCM RELEASE] Releasing non-BUSY cv!", \
553 __func__, __LINE__)); \
554 (x)->flags &= ~SD_F_BUSY; \
555 if ((x)->cv.cv_waiters != 0) \
556 cv_broadcast(&(x)->cv); \
559 /* Quick version, for shorter path. */
560 #define PCM_ACQUIRE_QUICK(x) do { \
561 PCM_UNLOCKASSERT(x); \
568 #define PCM_RELEASE_QUICK(x) do { \
569 PCM_UNLOCKASSERT(x); \
575 #define PCM_BUSYASSERT(x) KASSERT(x != NULL && \
576 ((x)->flags & SD_F_BUSY), \
577 ("%s(%d): [PCM BUSYASSERT] " \
578 "Failed, snddev_info=%p", \
579 __func__, __LINE__, x))
581 #define PCM_GIANT_ENTER(x) do { \
582 int _pcm_giant = 0; \
583 PCM_UNLOCKASSERT(x); \
584 if (!((x)->flags & SD_F_MPSAFE) && mtx_owned(&Giant) == 0) \
590 #define PCM_GIANT_EXIT(x) do { \
591 PCM_UNLOCKASSERT(x); \
592 KASSERT(_pcm_giant == 0 || _pcm_giant == 1, \
593 ("%s(%d): [GIANT EXIT] _pcm_giant screwed!", \
594 __func__, __LINE__)); \
595 KASSERT(!((x)->flags & SD_F_MPSAFE) || \
596 (((x)->flags & SD_F_MPSAFE) && _pcm_giant == 0), \
597 ("%s(%d): [GIANT EXIT] MPSAFE Giant?", \
598 __func__, __LINE__)); \
599 if (_pcm_giant != 0) { \
600 mtx_assert(&Giant, MA_OWNED); \
602 mtx_unlock(&Giant); \
605 #endif /* !SND_DIAGNOSTIC */
607 #define PCM_GIANT_LEAVE(x) \
612 #define PCM_KLDSTRING(a) ("kld " # a)
614 #define PCM_KLDSTRING(a) ""