1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 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 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 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. 17 * 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 28 * SUCH DAMAGE. 29 */ 30 31 /* 32 * first, include kernel header files. 33 */ 34 35 #ifndef _OS_H_ 36 #define _OS_H_ 37 38 #ifdef _KERNEL 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/eventhandler.h> 42 #include <sys/ioccom.h> 43 #include <sys/filio.h> 44 #include <sys/sockio.h> 45 #include <sys/fcntl.h> 46 #include <sys/selinfo.h> 47 #include <sys/proc.h> 48 #include <sys/kernel.h> /* for DATA_SET */ 49 #include <sys/module.h> 50 #include <sys/conf.h> 51 #include <sys/file.h> 52 #include <sys/uio.h> 53 #include <sys/syslog.h> 54 #include <sys/errno.h> 55 #include <sys/malloc.h> 56 #include <sys/bus.h> 57 #include <machine/resource.h> 58 #include <machine/bus.h> 59 #include <sys/rman.h> 60 #include <sys/limits.h> 61 #include <sys/mman.h> 62 #include <sys/poll.h> 63 #include <sys/sbuf.h> 64 #include <sys/soundcard.h> 65 #include <sys/sndstat.h> 66 #include <sys/sysctl.h> 67 #include <sys/kobj.h> 68 #include <vm/vm.h> 69 #include <vm/pmap.h> 70 71 #include <sys/lock.h> 72 #include <sys/mutex.h> 73 #include <sys/condvar.h> 74 75 #ifndef KOBJMETHOD_END 76 #define KOBJMETHOD_END { NULL, NULL } 77 #endif 78 79 struct pcm_channel; 80 struct pcm_feeder; 81 struct snd_dbuf; 82 struct snd_mixer; 83 84 #include <dev/sound/pcm/buffer.h> 85 #include <dev/sound/pcm/matrix.h> 86 #include <dev/sound/pcm/matrix_map.h> 87 #include <dev/sound/pcm/channel.h> 88 #include <dev/sound/pcm/feeder.h> 89 #include <dev/sound/pcm/mixer.h> 90 #include <dev/sound/pcm/dsp.h> 91 92 #define PCM_SOFTC_SIZE (sizeof(struct snddev_info)) 93 94 #define SND_STATUSLEN 64 95 96 #define SOUND_MODVER 5 97 98 #define SOUND_MINVER SOUND_MODVER 99 #define SOUND_PREFVER SOUND_MODVER 100 #define SOUND_MAXVER SOUND_MODVER 101 102 #define SND_MAXVCHANS 256 103 104 #define SD_F_SIMPLEX 0x00000001 105 #define SD_F_AUTOVCHAN 0x00000002 106 #define SD_F_SOFTPCMVOL 0x00000004 107 #define SD_F_DYING 0x00000008 108 #define SD_F_DETACHING 0x00000010 109 #define SD_F_BUSY 0x00000020 110 #define SD_F_MPSAFE 0x00000040 111 #define SD_F_REGISTERED 0x00000080 112 #define SD_F_BITPERFECT 0x00000100 113 #define SD_F_VPC 0x00000200 /* volume-per-channel */ 114 #define SD_F_EQ 0x00000400 /* EQ */ 115 #define SD_F_EQ_ENABLED 0x00000800 /* EQ enabled */ 116 #define SD_F_EQ_BYPASSED 0x00001000 /* EQ bypassed */ 117 #define SD_F_EQ_PC 0x00002000 /* EQ per-channel */ 118 119 #define SD_F_EQ_DEFAULT (SD_F_EQ | SD_F_EQ_ENABLED) 120 #define SD_F_EQ_MASK (SD_F_EQ | SD_F_EQ_ENABLED | \ 121 SD_F_EQ_BYPASSED | SD_F_EQ_PC) 122 123 #define SD_F_PRIO_RD 0x10000000 124 #define SD_F_PRIO_WR 0x20000000 125 126 #define SD_F_BITS "\020" \ 127 "\001SIMPLEX" \ 128 "\002AUTOVCHAN" \ 129 "\003SOFTPCMVOL" \ 130 "\004DYING" \ 131 "\005DETACHING" \ 132 "\006BUSY" \ 133 "\007MPSAFE" \ 134 "\010REGISTERED" \ 135 "\011BITPERFECT" \ 136 "\012VPC" \ 137 "\013EQ" \ 138 "\014EQ_ENABLED" \ 139 "\015EQ_BYPASSED" \ 140 "\016EQ_PC" \ 141 "\035PRIO_RD" \ 142 "\036PRIO_WR" 143 144 #define PCM_ALIVE(x) ((x) != NULL && (x)->lock != NULL && \ 145 !((x)->flags & SD_F_DYING)) 146 #define PCM_REGISTERED(x) (PCM_ALIVE(x) && \ 147 ((x)->flags & SD_F_REGISTERED)) 148 149 #define PCM_DETACHING(x) ((x)->flags & SD_F_DETACHING) 150 151 #define PCM_CHANCOUNT(d) \ 152 (d->playcount + d->pvchancount + d->reccount + d->rvchancount) 153 154 /* many variables should be reduced to a range. Here define a macro */ 155 #define RANGE(var, low, high) (var) = \ 156 (((var)<(low))? (low) : ((var)>(high))? (high) : (var)) 157 158 /* make figuring out what a format is easier. got AFMT_STEREO already */ 159 #define AFMT_32BIT (AFMT_S32_LE | AFMT_S32_BE | AFMT_U32_LE | AFMT_U32_BE) 160 #define AFMT_24BIT (AFMT_S24_LE | AFMT_S24_BE | AFMT_U24_LE | AFMT_U24_BE) 161 #define AFMT_16BIT (AFMT_S16_LE | AFMT_S16_BE | AFMT_U16_LE | AFMT_U16_BE) 162 #define AFMT_G711 (AFMT_MU_LAW | AFMT_A_LAW) 163 #define AFMT_8BIT (AFMT_G711 | AFMT_U8 | AFMT_S8) 164 #define AFMT_SIGNED (AFMT_S32_LE | AFMT_S32_BE | AFMT_S24_LE | AFMT_S24_BE | \ 165 AFMT_S16_LE | AFMT_S16_BE | AFMT_S8) 166 #define AFMT_BIGENDIAN (AFMT_S32_BE | AFMT_U32_BE | AFMT_S24_BE | AFMT_U24_BE | \ 167 AFMT_S16_BE | AFMT_U16_BE) 168 169 #define AFMT_CONVERTIBLE (AFMT_8BIT | AFMT_16BIT | AFMT_24BIT | \ 170 AFMT_32BIT) 171 172 /* Supported vchan mixing formats */ 173 #define AFMT_VCHAN (AFMT_CONVERTIBLE & ~AFMT_G711) 174 175 #define AFMT_PASSTHROUGH AFMT_AC3 176 #define AFMT_PASSTHROUGH_RATE 48000 177 #define AFMT_PASSTHROUGH_CHANNEL 2 178 #define AFMT_PASSTHROUGH_EXTCHANNEL 0 179 180 /* 181 * We're simply using unused, contiguous bits from various AFMT_ definitions. 182 * ~(0xb00ff7ff) 183 */ 184 #define AFMT_ENCODING_MASK 0xf00fffff 185 #define AFMT_CHANNEL_MASK 0x07f00000 186 #define AFMT_CHANNEL_SHIFT 20 187 #define AFMT_CHANNEL_MAX 0x7f 188 #define AFMT_EXTCHANNEL_MASK 0x08000000 189 #define AFMT_EXTCHANNEL_SHIFT 27 190 #define AFMT_EXTCHANNEL_MAX 1 191 192 #define AFMT_ENCODING(v) ((v) & AFMT_ENCODING_MASK) 193 194 #define AFMT_EXTCHANNEL(v) (((v) & AFMT_EXTCHANNEL_MASK) >> \ 195 AFMT_EXTCHANNEL_SHIFT) 196 197 #define AFMT_CHANNEL(v) (((v) & AFMT_CHANNEL_MASK) >> \ 198 AFMT_CHANNEL_SHIFT) 199 200 #define AFMT_BIT(v) (((v) & AFMT_32BIT) ? 32 : \ 201 (((v) & AFMT_24BIT) ? 24 : \ 202 ((((v) & AFMT_16BIT) || \ 203 ((v) & AFMT_PASSTHROUGH)) ? 16 : 8))) 204 205 #define AFMT_BPS(v) (AFMT_BIT(v) >> 3) 206 #define AFMT_ALIGN(v) (AFMT_BPS(v) * AFMT_CHANNEL(v)) 207 208 #define SND_FORMAT(f, c, e) (AFMT_ENCODING(f) | \ 209 (((c) << AFMT_CHANNEL_SHIFT) & \ 210 AFMT_CHANNEL_MASK) | \ 211 (((e) << AFMT_EXTCHANNEL_SHIFT) & \ 212 AFMT_EXTCHANNEL_MASK)) 213 214 #define AFMT_U8_NE AFMT_U8 215 #define AFMT_S8_NE AFMT_S8 216 217 #define AFMT_SIGNED_NE (AFMT_S8_NE | AFMT_S16_NE | AFMT_S24_NE | AFMT_S32_NE) 218 219 #define AFMT_NE (AFMT_SIGNED_NE | AFMT_U8_NE | AFMT_U16_NE | \ 220 AFMT_U24_NE | AFMT_U32_NE) 221 222 enum { 223 SND_DEV_CTL = 0, /* Control port /dev/mixer */ 224 SND_DEV_SEQ, /* Sequencer /dev/sequencer */ 225 SND_DEV_MIDIN, /* Raw midi access */ 226 SND_DEV_DSP, /* Digitized voice /dev/dsp */ 227 SND_DEV_STATUS, /* /dev/sndstat */ 228 SND_DEV_DSPHW_PLAY, /* specific playback channel */ 229 SND_DEV_DSPHW_VPLAY, /* specific virtual playback channel */ 230 SND_DEV_DSPHW_REC, /* specific record channel */ 231 SND_DEV_DSPHW_VREC, /* specific virtual record channel */ 232 }; 233 234 #define DSP_DEFAULT_SPEED 8000 235 236 extern int pcm_veto_load; 237 extern int snd_unit; 238 extern int snd_verbose; 239 extern devclass_t pcm_devclass; 240 extern struct unrhdr *pcmsg_unrhdr; 241 242 #ifndef DEB 243 #define DEB(x) 244 #endif 245 246 SYSCTL_DECL(_hw_snd); 247 248 int pcm_chnalloc(struct snddev_info *d, struct pcm_channel **ch, int direction, 249 pid_t pid, char *comm); 250 251 int pcm_addchan(device_t dev, int dir, kobj_class_t cls, void *devinfo); 252 unsigned int pcm_getbuffersize(device_t dev, unsigned int minbufsz, unsigned int deflt, unsigned int maxbufsz); 253 int pcm_register(device_t dev, void *devinfo, int numplay, int numrec); 254 int pcm_unregister(device_t dev); 255 int pcm_setstatus(device_t dev, char *str); 256 u_int32_t pcm_getflags(device_t dev); 257 void pcm_setflags(device_t dev, u_int32_t val); 258 void *pcm_getdevinfo(device_t dev); 259 260 int snd_setup_intr(device_t dev, struct resource *res, int flags, 261 driver_intr_t hand, void *param, void **cookiep); 262 263 void *snd_mtxcreate(const char *desc, const char *type); 264 void snd_mtxfree(void *m); 265 void snd_mtxassert(void *m); 266 #define snd_mtxlock(m) mtx_lock(m) 267 #define snd_mtxunlock(m) mtx_unlock(m) 268 269 int sndstat_register(device_t dev, char *str); 270 int sndstat_unregister(device_t dev); 271 272 /* These are the function codes assigned to the children of sound cards. */ 273 enum { 274 SCF_PCM, 275 SCF_MIDI, 276 SCF_SYNTH, 277 }; 278 279 /* 280 * This is the device information struct, used by a bridge device to pass the 281 * device function code to the children. 282 */ 283 struct sndcard_func { 284 int func; /* The function code. */ 285 void *varinfo; /* Bridge-specific information. */ 286 }; 287 288 /* 289 * this is rather kludgey- we need to duplicate these struct def'ns from sound.c 290 * so that the macro versions of pcm_{,un}lock can dereference them. 291 * we also have to do this now makedev() has gone away. 292 */ 293 294 struct snddev_info { 295 struct { 296 struct { 297 SLIST_HEAD(, pcm_channel) head; 298 struct { 299 SLIST_HEAD(, pcm_channel) head; 300 } busy; 301 struct { 302 SLIST_HEAD(, pcm_channel) head; 303 } opened; 304 } pcm; 305 } channels; 306 unsigned playcount, reccount, pvchancount, rvchancount; 307 unsigned flags; 308 unsigned int bufsz; 309 void *devinfo; 310 device_t dev; 311 char status[SND_STATUSLEN]; 312 struct mtx *lock; 313 struct cdev *mixer_dev; 314 struct cdev *dsp_dev; 315 uint32_t pvchanrate, pvchanformat; 316 uint32_t rvchanrate, rvchanformat; 317 int32_t eqpreamp; 318 struct sysctl_ctx_list play_sysctl_ctx, rec_sysctl_ctx; 319 struct sysctl_oid *play_sysctl_tree, *rec_sysctl_tree; 320 struct cv cv; 321 struct unrhdr *p_unr; 322 struct unrhdr *vp_unr; 323 struct unrhdr *r_unr; 324 struct unrhdr *vr_unr; 325 }; 326 327 void sound_oss_sysinfo(oss_sysinfo *); 328 int sound_oss_card_info(oss_card_info *); 329 330 #define PCM_MODE_MIXER 0x01 331 #define PCM_MODE_PLAY 0x02 332 #define PCM_MODE_REC 0x04 333 334 #define PCM_LOCKOWNED(d) mtx_owned((d)->lock) 335 #define PCM_LOCK(d) mtx_lock((d)->lock) 336 #define PCM_UNLOCK(d) mtx_unlock((d)->lock) 337 #define PCM_TRYLOCK(d) mtx_trylock((d)->lock) 338 #define PCM_LOCKASSERT(d) mtx_assert((d)->lock, MA_OWNED) 339 #define PCM_UNLOCKASSERT(d) mtx_assert((d)->lock, MA_NOTOWNED) 340 341 /* 342 * For PCM_[WAIT | ACQUIRE | RELEASE], be sure to surround these 343 * with PCM_LOCK/UNLOCK() sequence, or I'll come to gnaw upon you! 344 */ 345 #ifdef SND_DIAGNOSTIC 346 #define PCM_WAIT(x) do { \ 347 if (!PCM_LOCKOWNED(x)) \ 348 panic("%s(%d): [PCM WAIT] Mutex not owned!", \ 349 __func__, __LINE__); \ 350 while ((x)->flags & SD_F_BUSY) { \ 351 if (snd_verbose > 3) \ 352 device_printf((x)->dev, \ 353 "%s(%d): [PCM WAIT] calling cv_wait().\n", \ 354 __func__, __LINE__); \ 355 cv_wait(&(x)->cv, (x)->lock); \ 356 } \ 357 } while (0) 358 359 #define PCM_ACQUIRE(x) do { \ 360 if (!PCM_LOCKOWNED(x)) \ 361 panic("%s(%d): [PCM ACQUIRE] Mutex not owned!", \ 362 __func__, __LINE__); \ 363 if ((x)->flags & SD_F_BUSY) \ 364 panic("%s(%d): [PCM ACQUIRE] " \ 365 "Trying to acquire BUSY cv!", __func__, __LINE__); \ 366 (x)->flags |= SD_F_BUSY; \ 367 } while (0) 368 369 #define PCM_RELEASE(x) do { \ 370 if (!PCM_LOCKOWNED(x)) \ 371 panic("%s(%d): [PCM RELEASE] Mutex not owned!", \ 372 __func__, __LINE__); \ 373 if ((x)->flags & SD_F_BUSY) { \ 374 (x)->flags &= ~SD_F_BUSY; \ 375 if ((x)->cv.cv_waiters != 0) { \ 376 if ((x)->cv.cv_waiters > 1 && snd_verbose > 3) \ 377 device_printf((x)->dev, \ 378 "%s(%d): [PCM RELEASE] " \ 379 "cv_waiters=%d > 1!\n", \ 380 __func__, __LINE__, \ 381 (x)->cv.cv_waiters); \ 382 cv_broadcast(&(x)->cv); \ 383 } \ 384 } else \ 385 panic("%s(%d): [PCM RELEASE] Releasing non-BUSY cv!", \ 386 __func__, __LINE__); \ 387 } while (0) 388 389 /* Quick version, for shorter path. */ 390 #define PCM_ACQUIRE_QUICK(x) do { \ 391 if (PCM_LOCKOWNED(x)) \ 392 panic("%s(%d): [PCM ACQUIRE QUICK] Mutex owned!", \ 393 __func__, __LINE__); \ 394 PCM_LOCK(x); \ 395 PCM_WAIT(x); \ 396 PCM_ACQUIRE(x); \ 397 PCM_UNLOCK(x); \ 398 } while (0) 399 400 #define PCM_RELEASE_QUICK(x) do { \ 401 if (PCM_LOCKOWNED(x)) \ 402 panic("%s(%d): [PCM RELEASE QUICK] Mutex owned!", \ 403 __func__, __LINE__); \ 404 PCM_LOCK(x); \ 405 PCM_RELEASE(x); \ 406 PCM_UNLOCK(x); \ 407 } while (0) 408 409 #define PCM_BUSYASSERT(x) do { \ 410 if (!((x) != NULL && ((x)->flags & SD_F_BUSY))) \ 411 panic("%s(%d): [PCM BUSYASSERT] " \ 412 "Failed, snddev_info=%p", __func__, __LINE__, x); \ 413 } while (0) 414 415 #define PCM_GIANT_ENTER(x) do { \ 416 int _pcm_giant = 0; \ 417 if (PCM_LOCKOWNED(x)) \ 418 panic("%s(%d): [GIANT ENTER] PCM lock owned!", \ 419 __func__, __LINE__); \ 420 if (mtx_owned(&Giant) != 0 && snd_verbose > 3) \ 421 device_printf((x)->dev, \ 422 "%s(%d): [GIANT ENTER] Giant owned!\n", \ 423 __func__, __LINE__); \ 424 if (!((x)->flags & SD_F_MPSAFE) && mtx_owned(&Giant) == 0) \ 425 do { \ 426 mtx_lock(&Giant); \ 427 _pcm_giant = 1; \ 428 } while (0) 429 430 #define PCM_GIANT_EXIT(x) do { \ 431 if (PCM_LOCKOWNED(x)) \ 432 panic("%s(%d): [GIANT EXIT] PCM lock owned!", \ 433 __func__, __LINE__); \ 434 if (!(_pcm_giant == 0 || _pcm_giant == 1)) \ 435 panic("%s(%d): [GIANT EXIT] _pcm_giant screwed!", \ 436 __func__, __LINE__); \ 437 if ((x)->flags & SD_F_MPSAFE) { \ 438 if (_pcm_giant == 1) \ 439 panic("%s(%d): [GIANT EXIT] MPSAFE Giant?", \ 440 __func__, __LINE__); \ 441 if (mtx_owned(&Giant) != 0 && snd_verbose > 3) \ 442 device_printf((x)->dev, \ 443 "%s(%d): [GIANT EXIT] Giant owned!\n", \ 444 __func__, __LINE__); \ 445 } \ 446 if (_pcm_giant != 0) { \ 447 if (mtx_owned(&Giant) == 0) \ 448 panic("%s(%d): [GIANT EXIT] Giant not owned!", \ 449 __func__, __LINE__); \ 450 _pcm_giant = 0; \ 451 mtx_unlock(&Giant); \ 452 } \ 453 } while (0) 454 #else /* !SND_DIAGNOSTIC */ 455 #define PCM_WAIT(x) do { \ 456 PCM_LOCKASSERT(x); \ 457 while ((x)->flags & SD_F_BUSY) \ 458 cv_wait(&(x)->cv, (x)->lock); \ 459 } while (0) 460 461 #define PCM_ACQUIRE(x) do { \ 462 PCM_LOCKASSERT(x); \ 463 KASSERT(!((x)->flags & SD_F_BUSY), \ 464 ("%s(%d): [PCM ACQUIRE] Trying to acquire BUSY cv!", \ 465 __func__, __LINE__)); \ 466 (x)->flags |= SD_F_BUSY; \ 467 } while (0) 468 469 #define PCM_RELEASE(x) do { \ 470 PCM_LOCKASSERT(x); \ 471 KASSERT((x)->flags & SD_F_BUSY, \ 472 ("%s(%d): [PCM RELEASE] Releasing non-BUSY cv!", \ 473 __func__, __LINE__)); \ 474 (x)->flags &= ~SD_F_BUSY; \ 475 if ((x)->cv.cv_waiters != 0) \ 476 cv_broadcast(&(x)->cv); \ 477 } while (0) 478 479 /* Quick version, for shorter path. */ 480 #define PCM_ACQUIRE_QUICK(x) do { \ 481 PCM_UNLOCKASSERT(x); \ 482 PCM_LOCK(x); \ 483 PCM_WAIT(x); \ 484 PCM_ACQUIRE(x); \ 485 PCM_UNLOCK(x); \ 486 } while (0) 487 488 #define PCM_RELEASE_QUICK(x) do { \ 489 PCM_UNLOCKASSERT(x); \ 490 PCM_LOCK(x); \ 491 PCM_RELEASE(x); \ 492 PCM_UNLOCK(x); \ 493 } while (0) 494 495 #define PCM_BUSYASSERT(x) KASSERT(x != NULL && \ 496 ((x)->flags & SD_F_BUSY), \ 497 ("%s(%d): [PCM BUSYASSERT] " \ 498 "Failed, snddev_info=%p", \ 499 __func__, __LINE__, x)) 500 501 #define PCM_GIANT_ENTER(x) do { \ 502 int _pcm_giant = 0; \ 503 PCM_UNLOCKASSERT(x); \ 504 if (!((x)->flags & SD_F_MPSAFE) && mtx_owned(&Giant) == 0) \ 505 do { \ 506 mtx_lock(&Giant); \ 507 _pcm_giant = 1; \ 508 } while (0) 509 510 #define PCM_GIANT_EXIT(x) do { \ 511 PCM_UNLOCKASSERT(x); \ 512 KASSERT(_pcm_giant == 0 || _pcm_giant == 1, \ 513 ("%s(%d): [GIANT EXIT] _pcm_giant screwed!", \ 514 __func__, __LINE__)); \ 515 KASSERT(!((x)->flags & SD_F_MPSAFE) || \ 516 (((x)->flags & SD_F_MPSAFE) && _pcm_giant == 0), \ 517 ("%s(%d): [GIANT EXIT] MPSAFE Giant?", \ 518 __func__, __LINE__)); \ 519 if (_pcm_giant != 0) { \ 520 mtx_assert(&Giant, MA_OWNED); \ 521 _pcm_giant = 0; \ 522 mtx_unlock(&Giant); \ 523 } \ 524 } while (0) 525 #endif /* SND_DIAGNOSTIC */ 526 527 #define PCM_GIANT_LEAVE(x) \ 528 PCM_GIANT_EXIT(x); \ 529 } while (0) 530 531 #endif /* _KERNEL */ 532 533 #endif /* _OS_H_ */ 534