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 /* 103 * By design, limit possible channels for each direction. 104 */ 105 #define SND_MAXHWCHAN 256 106 #define SND_MAXVCHANS SND_MAXHWCHAN 107 108 #define SD_F_SIMPLEX 0x00000001 109 #define SD_F_AUTOVCHAN 0x00000002 110 #define SD_F_SOFTPCMVOL 0x00000004 111 #define SD_F_DYING 0x00000008 112 #define SD_F_DETACHING 0x00000010 113 #define SD_F_BUSY 0x00000020 114 #define SD_F_MPSAFE 0x00000040 115 #define SD_F_REGISTERED 0x00000080 116 #define SD_F_BITPERFECT 0x00000100 117 #define SD_F_VPC 0x00000200 /* volume-per-channel */ 118 #define SD_F_EQ 0x00000400 /* EQ */ 119 #define SD_F_EQ_ENABLED 0x00000800 /* EQ enabled */ 120 #define SD_F_EQ_BYPASSED 0x00001000 /* EQ bypassed */ 121 #define SD_F_EQ_PC 0x00002000 /* EQ per-channel */ 122 123 #define SD_F_EQ_DEFAULT (SD_F_EQ | SD_F_EQ_ENABLED) 124 #define SD_F_EQ_MASK (SD_F_EQ | SD_F_EQ_ENABLED | \ 125 SD_F_EQ_BYPASSED | SD_F_EQ_PC) 126 127 #define SD_F_PRIO_RD 0x10000000 128 #define SD_F_PRIO_WR 0x20000000 129 130 #define SD_F_BITS "\020" \ 131 "\001SIMPLEX" \ 132 "\002AUTOVCHAN" \ 133 "\003SOFTPCMVOL" \ 134 "\004DYING" \ 135 "\005DETACHING" \ 136 "\006BUSY" \ 137 "\007MPSAFE" \ 138 "\010REGISTERED" \ 139 "\011BITPERFECT" \ 140 "\012VPC" \ 141 "\013EQ" \ 142 "\014EQ_ENABLED" \ 143 "\015EQ_BYPASSED" \ 144 "\016EQ_PC" \ 145 "\035PRIO_RD" \ 146 "\036PRIO_WR" 147 148 #define PCM_ALIVE(x) ((x) != NULL && (x)->lock != NULL && \ 149 !((x)->flags & SD_F_DYING)) 150 #define PCM_REGISTERED(x) (PCM_ALIVE(x) && \ 151 ((x)->flags & SD_F_REGISTERED)) 152 153 #define PCM_DETACHING(x) ((x)->flags & SD_F_DETACHING) 154 155 #define PCM_CHANCOUNT(d) \ 156 (d->playcount + d->pvchancount + d->reccount + d->rvchancount) 157 158 /* many variables should be reduced to a range. Here define a macro */ 159 #define RANGE(var, low, high) (var) = \ 160 (((var)<(low))? (low) : ((var)>(high))? (high) : (var)) 161 162 /* make figuring out what a format is easier. got AFMT_STEREO already */ 163 #define AFMT_32BIT (AFMT_S32_LE | AFMT_S32_BE | AFMT_U32_LE | AFMT_U32_BE) 164 #define AFMT_24BIT (AFMT_S24_LE | AFMT_S24_BE | AFMT_U24_LE | AFMT_U24_BE) 165 #define AFMT_16BIT (AFMT_S16_LE | AFMT_S16_BE | AFMT_U16_LE | AFMT_U16_BE) 166 #define AFMT_G711 (AFMT_MU_LAW | AFMT_A_LAW) 167 #define AFMT_8BIT (AFMT_G711 | AFMT_U8 | AFMT_S8) 168 #define AFMT_SIGNED (AFMT_S32_LE | AFMT_S32_BE | AFMT_S24_LE | AFMT_S24_BE | \ 169 AFMT_S16_LE | AFMT_S16_BE | AFMT_S8) 170 #define AFMT_BIGENDIAN (AFMT_S32_BE | AFMT_U32_BE | AFMT_S24_BE | AFMT_U24_BE | \ 171 AFMT_S16_BE | AFMT_U16_BE) 172 173 #define AFMT_CONVERTIBLE (AFMT_8BIT | AFMT_16BIT | AFMT_24BIT | \ 174 AFMT_32BIT) 175 176 /* Supported vchan mixing formats */ 177 #define AFMT_VCHAN (AFMT_CONVERTIBLE & ~AFMT_G711) 178 179 #define AFMT_PASSTHROUGH AFMT_AC3 180 #define AFMT_PASSTHROUGH_RATE 48000 181 #define AFMT_PASSTHROUGH_CHANNEL 2 182 #define AFMT_PASSTHROUGH_EXTCHANNEL 0 183 184 /* 185 * We're simply using unused, contiguous bits from various AFMT_ definitions. 186 * ~(0xb00ff7ff) 187 */ 188 #define AFMT_ENCODING_MASK 0xf00fffff 189 #define AFMT_CHANNEL_MASK 0x07f00000 190 #define AFMT_CHANNEL_SHIFT 20 191 #define AFMT_CHANNEL_MAX 0x7f 192 #define AFMT_EXTCHANNEL_MASK 0x08000000 193 #define AFMT_EXTCHANNEL_SHIFT 27 194 #define AFMT_EXTCHANNEL_MAX 1 195 196 #define AFMT_ENCODING(v) ((v) & AFMT_ENCODING_MASK) 197 198 #define AFMT_EXTCHANNEL(v) (((v) & AFMT_EXTCHANNEL_MASK) >> \ 199 AFMT_EXTCHANNEL_SHIFT) 200 201 #define AFMT_CHANNEL(v) (((v) & AFMT_CHANNEL_MASK) >> \ 202 AFMT_CHANNEL_SHIFT) 203 204 #define AFMT_BIT(v) (((v) & AFMT_32BIT) ? 32 : \ 205 (((v) & AFMT_24BIT) ? 24 : \ 206 ((((v) & AFMT_16BIT) || \ 207 ((v) & AFMT_PASSTHROUGH)) ? 16 : 8))) 208 209 #define AFMT_BPS(v) (AFMT_BIT(v) >> 3) 210 #define AFMT_ALIGN(v) (AFMT_BPS(v) * AFMT_CHANNEL(v)) 211 212 #define SND_FORMAT(f, c, e) (AFMT_ENCODING(f) | \ 213 (((c) << AFMT_CHANNEL_SHIFT) & \ 214 AFMT_CHANNEL_MASK) | \ 215 (((e) << AFMT_EXTCHANNEL_SHIFT) & \ 216 AFMT_EXTCHANNEL_MASK)) 217 218 #define AFMT_U8_NE AFMT_U8 219 #define AFMT_S8_NE AFMT_S8 220 221 #define AFMT_SIGNED_NE (AFMT_S8_NE | AFMT_S16_NE | AFMT_S24_NE | AFMT_S32_NE) 222 223 #define AFMT_NE (AFMT_SIGNED_NE | AFMT_U8_NE | AFMT_U16_NE | \ 224 AFMT_U24_NE | AFMT_U32_NE) 225 226 enum { 227 SND_DEV_CTL = 0, /* Control port /dev/mixer */ 228 SND_DEV_SEQ, /* Sequencer /dev/sequencer */ 229 SND_DEV_MIDIN, /* Raw midi access */ 230 SND_DEV_DSP, /* Digitized voice /dev/dsp */ 231 SND_DEV_STATUS, /* /dev/sndstat */ 232 SND_DEV_DSPHW_PLAY, /* specific playback channel */ 233 SND_DEV_DSPHW_VPLAY, /* specific virtual playback channel */ 234 SND_DEV_DSPHW_REC, /* specific record channel */ 235 SND_DEV_DSPHW_VREC, /* specific virtual record channel */ 236 }; 237 238 #define DSP_DEFAULT_SPEED 8000 239 240 extern int pcm_veto_load; 241 extern int snd_unit; 242 extern int snd_verbose; 243 extern devclass_t pcm_devclass; 244 extern struct unrhdr *pcmsg_unrhdr; 245 246 #ifndef DEB 247 #define DEB(x) 248 #endif 249 250 SYSCTL_DECL(_hw_snd); 251 252 int pcm_chnalloc(struct snddev_info *d, struct pcm_channel **ch, int direction, 253 pid_t pid, char *comm); 254 255 void pcm_chn_add(struct snddev_info *d, struct pcm_channel *ch); 256 int pcm_chn_remove(struct snddev_info *d, struct pcm_channel *ch); 257 258 int pcm_addchan(device_t dev, int dir, kobj_class_t cls, void *devinfo); 259 unsigned int pcm_getbuffersize(device_t dev, unsigned int minbufsz, unsigned int deflt, unsigned int maxbufsz); 260 int pcm_register(device_t dev, void *devinfo, int numplay, int numrec); 261 int pcm_unregister(device_t dev); 262 int pcm_setstatus(device_t dev, char *str); 263 u_int32_t pcm_getflags(device_t dev); 264 void pcm_setflags(device_t dev, u_int32_t val); 265 void *pcm_getdevinfo(device_t dev); 266 267 int snd_setup_intr(device_t dev, struct resource *res, int flags, 268 driver_intr_t hand, void *param, void **cookiep); 269 270 void *snd_mtxcreate(const char *desc, const char *type); 271 void snd_mtxfree(void *m); 272 void snd_mtxassert(void *m); 273 #define snd_mtxlock(m) mtx_lock(m) 274 #define snd_mtxunlock(m) mtx_unlock(m) 275 276 int sndstat_register(device_t dev, char *str); 277 int sndstat_unregister(device_t dev); 278 279 /* These are the function codes assigned to the children of sound cards. */ 280 enum { 281 SCF_PCM, 282 SCF_MIDI, 283 SCF_SYNTH, 284 }; 285 286 /* 287 * This is the device information struct, used by a bridge device to pass the 288 * device function code to the children. 289 */ 290 struct sndcard_func { 291 int func; /* The function code. */ 292 void *varinfo; /* Bridge-specific information. */ 293 }; 294 295 /* 296 * this is rather kludgey- we need to duplicate these struct def'ns from sound.c 297 * so that the macro versions of pcm_{,un}lock can dereference them. 298 * we also have to do this now makedev() has gone away. 299 */ 300 301 struct snddev_info { 302 struct { 303 struct { 304 SLIST_HEAD(, pcm_channel) head; 305 struct { 306 SLIST_HEAD(, pcm_channel) head; 307 } busy; 308 struct { 309 SLIST_HEAD(, pcm_channel) head; 310 } opened; 311 } pcm; 312 } channels; 313 unsigned playcount, reccount, pvchancount, rvchancount; 314 unsigned flags; 315 unsigned int bufsz; 316 void *devinfo; 317 device_t dev; 318 char status[SND_STATUSLEN]; 319 struct mtx *lock; 320 struct cdev *mixer_dev; 321 struct cdev *dsp_dev; 322 uint32_t pvchanrate, pvchanformat; 323 uint32_t rvchanrate, rvchanformat; 324 int32_t eqpreamp; 325 struct sysctl_ctx_list play_sysctl_ctx, rec_sysctl_ctx; 326 struct sysctl_oid *play_sysctl_tree, *rec_sysctl_tree; 327 struct cv cv; 328 }; 329 330 void sound_oss_sysinfo(oss_sysinfo *); 331 int sound_oss_card_info(oss_card_info *); 332 333 #define PCM_MODE_MIXER 0x01 334 #define PCM_MODE_PLAY 0x02 335 #define PCM_MODE_REC 0x04 336 337 #define PCM_LOCKOWNED(d) mtx_owned((d)->lock) 338 #define PCM_LOCK(d) mtx_lock((d)->lock) 339 #define PCM_UNLOCK(d) mtx_unlock((d)->lock) 340 #define PCM_TRYLOCK(d) mtx_trylock((d)->lock) 341 #define PCM_LOCKASSERT(d) mtx_assert((d)->lock, MA_OWNED) 342 #define PCM_UNLOCKASSERT(d) mtx_assert((d)->lock, MA_NOTOWNED) 343 344 /* 345 * For PCM_[WAIT | ACQUIRE | RELEASE], be sure to surround these 346 * with PCM_LOCK/UNLOCK() sequence, or I'll come to gnaw upon you! 347 */ 348 #ifdef SND_DIAGNOSTIC 349 #define PCM_WAIT(x) do { \ 350 if (!PCM_LOCKOWNED(x)) \ 351 panic("%s(%d): [PCM WAIT] Mutex not owned!", \ 352 __func__, __LINE__); \ 353 while ((x)->flags & SD_F_BUSY) { \ 354 if (snd_verbose > 3) \ 355 device_printf((x)->dev, \ 356 "%s(%d): [PCM WAIT] calling cv_wait().\n", \ 357 __func__, __LINE__); \ 358 cv_wait(&(x)->cv, (x)->lock); \ 359 } \ 360 } while (0) 361 362 #define PCM_ACQUIRE(x) do { \ 363 if (!PCM_LOCKOWNED(x)) \ 364 panic("%s(%d): [PCM ACQUIRE] Mutex not owned!", \ 365 __func__, __LINE__); \ 366 if ((x)->flags & SD_F_BUSY) \ 367 panic("%s(%d): [PCM ACQUIRE] " \ 368 "Trying to acquire BUSY cv!", __func__, __LINE__); \ 369 (x)->flags |= SD_F_BUSY; \ 370 } while (0) 371 372 #define PCM_RELEASE(x) do { \ 373 if (!PCM_LOCKOWNED(x)) \ 374 panic("%s(%d): [PCM RELEASE] Mutex not owned!", \ 375 __func__, __LINE__); \ 376 if ((x)->flags & SD_F_BUSY) { \ 377 (x)->flags &= ~SD_F_BUSY; \ 378 if ((x)->cv.cv_waiters != 0) { \ 379 if ((x)->cv.cv_waiters > 1 && snd_verbose > 3) \ 380 device_printf((x)->dev, \ 381 "%s(%d): [PCM RELEASE] " \ 382 "cv_waiters=%d > 1!\n", \ 383 __func__, __LINE__, \ 384 (x)->cv.cv_waiters); \ 385 cv_broadcast(&(x)->cv); \ 386 } \ 387 } else \ 388 panic("%s(%d): [PCM RELEASE] Releasing non-BUSY cv!", \ 389 __func__, __LINE__); \ 390 } while (0) 391 392 /* Quick version, for shorter path. */ 393 #define PCM_ACQUIRE_QUICK(x) do { \ 394 if (PCM_LOCKOWNED(x)) \ 395 panic("%s(%d): [PCM ACQUIRE QUICK] Mutex owned!", \ 396 __func__, __LINE__); \ 397 PCM_LOCK(x); \ 398 PCM_WAIT(x); \ 399 PCM_ACQUIRE(x); \ 400 PCM_UNLOCK(x); \ 401 } while (0) 402 403 #define PCM_RELEASE_QUICK(x) do { \ 404 if (PCM_LOCKOWNED(x)) \ 405 panic("%s(%d): [PCM RELEASE QUICK] Mutex owned!", \ 406 __func__, __LINE__); \ 407 PCM_LOCK(x); \ 408 PCM_RELEASE(x); \ 409 PCM_UNLOCK(x); \ 410 } while (0) 411 412 #define PCM_BUSYASSERT(x) do { \ 413 if (!((x) != NULL && ((x)->flags & SD_F_BUSY))) \ 414 panic("%s(%d): [PCM BUSYASSERT] " \ 415 "Failed, snddev_info=%p", __func__, __LINE__, x); \ 416 } while (0) 417 418 #define PCM_GIANT_ENTER(x) do { \ 419 int _pcm_giant = 0; \ 420 if (PCM_LOCKOWNED(x)) \ 421 panic("%s(%d): [GIANT ENTER] PCM lock owned!", \ 422 __func__, __LINE__); \ 423 if (mtx_owned(&Giant) != 0 && snd_verbose > 3) \ 424 device_printf((x)->dev, \ 425 "%s(%d): [GIANT ENTER] Giant owned!\n", \ 426 __func__, __LINE__); \ 427 if (!((x)->flags & SD_F_MPSAFE) && mtx_owned(&Giant) == 0) \ 428 do { \ 429 mtx_lock(&Giant); \ 430 _pcm_giant = 1; \ 431 } while (0) 432 433 #define PCM_GIANT_EXIT(x) do { \ 434 if (PCM_LOCKOWNED(x)) \ 435 panic("%s(%d): [GIANT EXIT] PCM lock owned!", \ 436 __func__, __LINE__); \ 437 if (!(_pcm_giant == 0 || _pcm_giant == 1)) \ 438 panic("%s(%d): [GIANT EXIT] _pcm_giant screwed!", \ 439 __func__, __LINE__); \ 440 if ((x)->flags & SD_F_MPSAFE) { \ 441 if (_pcm_giant == 1) \ 442 panic("%s(%d): [GIANT EXIT] MPSAFE Giant?", \ 443 __func__, __LINE__); \ 444 if (mtx_owned(&Giant) != 0 && snd_verbose > 3) \ 445 device_printf((x)->dev, \ 446 "%s(%d): [GIANT EXIT] Giant owned!\n", \ 447 __func__, __LINE__); \ 448 } \ 449 if (_pcm_giant != 0) { \ 450 if (mtx_owned(&Giant) == 0) \ 451 panic("%s(%d): [GIANT EXIT] Giant not owned!", \ 452 __func__, __LINE__); \ 453 _pcm_giant = 0; \ 454 mtx_unlock(&Giant); \ 455 } \ 456 } while (0) 457 #else /* !SND_DIAGNOSTIC */ 458 #define PCM_WAIT(x) do { \ 459 PCM_LOCKASSERT(x); \ 460 while ((x)->flags & SD_F_BUSY) \ 461 cv_wait(&(x)->cv, (x)->lock); \ 462 } while (0) 463 464 #define PCM_ACQUIRE(x) do { \ 465 PCM_LOCKASSERT(x); \ 466 KASSERT(!((x)->flags & SD_F_BUSY), \ 467 ("%s(%d): [PCM ACQUIRE] Trying to acquire BUSY cv!", \ 468 __func__, __LINE__)); \ 469 (x)->flags |= SD_F_BUSY; \ 470 } while (0) 471 472 #define PCM_RELEASE(x) do { \ 473 PCM_LOCKASSERT(x); \ 474 KASSERT((x)->flags & SD_F_BUSY, \ 475 ("%s(%d): [PCM RELEASE] Releasing non-BUSY cv!", \ 476 __func__, __LINE__)); \ 477 (x)->flags &= ~SD_F_BUSY; \ 478 if ((x)->cv.cv_waiters != 0) \ 479 cv_broadcast(&(x)->cv); \ 480 } while (0) 481 482 /* Quick version, for shorter path. */ 483 #define PCM_ACQUIRE_QUICK(x) do { \ 484 PCM_UNLOCKASSERT(x); \ 485 PCM_LOCK(x); \ 486 PCM_WAIT(x); \ 487 PCM_ACQUIRE(x); \ 488 PCM_UNLOCK(x); \ 489 } while (0) 490 491 #define PCM_RELEASE_QUICK(x) do { \ 492 PCM_UNLOCKASSERT(x); \ 493 PCM_LOCK(x); \ 494 PCM_RELEASE(x); \ 495 PCM_UNLOCK(x); \ 496 } while (0) 497 498 #define PCM_BUSYASSERT(x) KASSERT(x != NULL && \ 499 ((x)->flags & SD_F_BUSY), \ 500 ("%s(%d): [PCM BUSYASSERT] " \ 501 "Failed, snddev_info=%p", \ 502 __func__, __LINE__, x)) 503 504 #define PCM_GIANT_ENTER(x) do { \ 505 int _pcm_giant = 0; \ 506 PCM_UNLOCKASSERT(x); \ 507 if (!((x)->flags & SD_F_MPSAFE) && mtx_owned(&Giant) == 0) \ 508 do { \ 509 mtx_lock(&Giant); \ 510 _pcm_giant = 1; \ 511 } while (0) 512 513 #define PCM_GIANT_EXIT(x) do { \ 514 PCM_UNLOCKASSERT(x); \ 515 KASSERT(_pcm_giant == 0 || _pcm_giant == 1, \ 516 ("%s(%d): [GIANT EXIT] _pcm_giant screwed!", \ 517 __func__, __LINE__)); \ 518 KASSERT(!((x)->flags & SD_F_MPSAFE) || \ 519 (((x)->flags & SD_F_MPSAFE) && _pcm_giant == 0), \ 520 ("%s(%d): [GIANT EXIT] MPSAFE Giant?", \ 521 __func__, __LINE__)); \ 522 if (_pcm_giant != 0) { \ 523 mtx_assert(&Giant, MA_OWNED); \ 524 _pcm_giant = 0; \ 525 mtx_unlock(&Giant); \ 526 } \ 527 } while (0) 528 #endif /* SND_DIAGNOSTIC */ 529 530 #define PCM_GIANT_LEAVE(x) \ 531 PCM_GIANT_EXIT(x); \ 532 } while (0) 533 534 #endif /* _KERNEL */ 535 536 #endif /* _OS_H_ */ 537