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 #define SD_F_PRIO_SET (SD_F_PRIO_RD | SD_F_PRIO_WR) 130 #define SD_F_DIR_SET 0x40000000 131 #define SD_F_TRANSIENT 0xf0000000 132 133 #define SD_F_BITS "\020" \ 134 "\001SIMPLEX" \ 135 "\002AUTOVCHAN" \ 136 "\003SOFTPCMVOL" \ 137 "\004DYING" \ 138 "\005DETACHING" \ 139 "\006BUSY" \ 140 "\007MPSAFE" \ 141 "\010REGISTERED" \ 142 "\011BITPERFECT" \ 143 "\012VPC" \ 144 "\013EQ" \ 145 "\014EQ_ENABLED" \ 146 "\015EQ_BYPASSED" \ 147 "\016EQ_PC" \ 148 "\035PRIO_RD" \ 149 "\036PRIO_WR" \ 150 "\037DIR_SET" 151 152 #define PCM_ALIVE(x) ((x) != NULL && (x)->lock != NULL && \ 153 !((x)->flags & SD_F_DYING)) 154 #define PCM_REGISTERED(x) (PCM_ALIVE(x) && \ 155 ((x)->flags & SD_F_REGISTERED)) 156 157 #define PCM_DETACHING(x) ((x)->flags & SD_F_DETACHING) 158 159 #define PCM_CHANCOUNT(d) \ 160 (d->playcount + d->pvchancount + d->reccount + d->rvchancount) 161 162 /* many variables should be reduced to a range. Here define a macro */ 163 #define RANGE(var, low, high) (var) = \ 164 (((var)<(low))? (low) : ((var)>(high))? (high) : (var)) 165 #define DSP_BUFFSIZE (8192) 166 167 /* make figuring out what a format is easier. got AFMT_STEREO already */ 168 #define AFMT_32BIT (AFMT_S32_LE | AFMT_S32_BE | AFMT_U32_LE | AFMT_U32_BE) 169 #define AFMT_24BIT (AFMT_S24_LE | AFMT_S24_BE | AFMT_U24_LE | AFMT_U24_BE) 170 #define AFMT_16BIT (AFMT_S16_LE | AFMT_S16_BE | AFMT_U16_LE | AFMT_U16_BE) 171 #define AFMT_G711 (AFMT_MU_LAW | AFMT_A_LAW) 172 #define AFMT_8BIT (AFMT_G711 | AFMT_U8 | AFMT_S8) 173 #define AFMT_SIGNED (AFMT_S32_LE | AFMT_S32_BE | AFMT_S24_LE | AFMT_S24_BE | \ 174 AFMT_S16_LE | AFMT_S16_BE | AFMT_S8) 175 #define AFMT_BIGENDIAN (AFMT_S32_BE | AFMT_U32_BE | AFMT_S24_BE | AFMT_U24_BE | \ 176 AFMT_S16_BE | AFMT_U16_BE) 177 178 #define AFMT_CONVERTIBLE (AFMT_8BIT | AFMT_16BIT | AFMT_24BIT | \ 179 AFMT_32BIT) 180 181 /* Supported vchan mixing formats */ 182 #define AFMT_VCHAN (AFMT_CONVERTIBLE & ~AFMT_G711) 183 184 #define AFMT_PASSTHROUGH AFMT_AC3 185 #define AFMT_PASSTHROUGH_RATE 48000 186 #define AFMT_PASSTHROUGH_CHANNEL 2 187 #define AFMT_PASSTHROUGH_EXTCHANNEL 0 188 189 /* 190 * We're simply using unused, contiguous bits from various AFMT_ definitions. 191 * ~(0xb00ff7ff) 192 */ 193 #define AFMT_ENCODING_MASK 0xf00fffff 194 #define AFMT_CHANNEL_MASK 0x07f00000 195 #define AFMT_CHANNEL_SHIFT 20 196 #define AFMT_CHANNEL_MAX 0x7f 197 #define AFMT_EXTCHANNEL_MASK 0x08000000 198 #define AFMT_EXTCHANNEL_SHIFT 27 199 #define AFMT_EXTCHANNEL_MAX 1 200 201 #define AFMT_ENCODING(v) ((v) & AFMT_ENCODING_MASK) 202 203 #define AFMT_EXTCHANNEL(v) (((v) & AFMT_EXTCHANNEL_MASK) >> \ 204 AFMT_EXTCHANNEL_SHIFT) 205 206 #define AFMT_CHANNEL(v) (((v) & AFMT_CHANNEL_MASK) >> \ 207 AFMT_CHANNEL_SHIFT) 208 209 #define AFMT_BIT(v) (((v) & AFMT_32BIT) ? 32 : \ 210 (((v) & AFMT_24BIT) ? 24 : \ 211 ((((v) & AFMT_16BIT) || \ 212 ((v) & AFMT_PASSTHROUGH)) ? 16 : 8))) 213 214 #define AFMT_BPS(v) (AFMT_BIT(v) >> 3) 215 #define AFMT_ALIGN(v) (AFMT_BPS(v) * AFMT_CHANNEL(v)) 216 217 #define SND_FORMAT(f, c, e) (AFMT_ENCODING(f) | \ 218 (((c) << AFMT_CHANNEL_SHIFT) & \ 219 AFMT_CHANNEL_MASK) | \ 220 (((e) << AFMT_EXTCHANNEL_SHIFT) & \ 221 AFMT_EXTCHANNEL_MASK)) 222 223 #define AFMT_U8_NE AFMT_U8 224 #define AFMT_S8_NE AFMT_S8 225 226 #define AFMT_SIGNED_NE (AFMT_S8_NE | AFMT_S16_NE | AFMT_S24_NE | AFMT_S32_NE) 227 228 #define AFMT_NE (AFMT_SIGNED_NE | AFMT_U8_NE | AFMT_U16_NE | \ 229 AFMT_U24_NE | AFMT_U32_NE) 230 231 enum { 232 SND_DEV_CTL = 0, /* Control port /dev/mixer */ 233 SND_DEV_SEQ, /* Sequencer /dev/sequencer */ 234 SND_DEV_MIDIN, /* Raw midi access */ 235 SND_DEV_DSP, /* Digitized voice /dev/dsp */ 236 SND_DEV_STATUS, /* /dev/sndstat */ 237 SND_DEV_DSPHW_PLAY, /* specific playback channel */ 238 SND_DEV_DSPHW_VPLAY, /* specific virtual playback channel */ 239 SND_DEV_DSPHW_REC, /* specific record channel */ 240 SND_DEV_DSPHW_VREC, /* specific virtual record channel */ 241 }; 242 243 #define DSP_DEFAULT_SPEED 8000 244 245 #define ON 1 246 #define OFF 0 247 248 extern int pcm_veto_load; 249 extern int snd_unit; 250 extern int snd_verbose; 251 extern devclass_t pcm_devclass; 252 extern struct unrhdr *pcmsg_unrhdr; 253 254 /* 255 * some macros for debugging purposes 256 * DDB/DEB to enable/disable debugging stuff 257 * BVDDB to enable debugging when bootverbose 258 */ 259 #define BVDDB(x) if (bootverbose) x 260 261 #ifndef DEB 262 #define DEB(x) 263 #endif 264 265 SYSCTL_DECL(_hw_snd); 266 267 int pcm_chnalloc(struct snddev_info *d, struct pcm_channel **ch, int direction, 268 pid_t pid, char *comm); 269 270 void pcm_chn_add(struct snddev_info *d, struct pcm_channel *ch); 271 int pcm_chn_remove(struct snddev_info *d, struct pcm_channel *ch); 272 273 int pcm_addchan(device_t dev, int dir, kobj_class_t cls, void *devinfo); 274 unsigned int pcm_getbuffersize(device_t dev, unsigned int minbufsz, unsigned int deflt, unsigned int maxbufsz); 275 int pcm_register(device_t dev, void *devinfo, int numplay, int numrec); 276 int pcm_unregister(device_t dev); 277 int pcm_setstatus(device_t dev, char *str); 278 u_int32_t pcm_getflags(device_t dev); 279 void pcm_setflags(device_t dev, u_int32_t val); 280 void *pcm_getdevinfo(device_t dev); 281 282 int snd_setup_intr(device_t dev, struct resource *res, int flags, 283 driver_intr_t hand, void *param, void **cookiep); 284 285 void *snd_mtxcreate(const char *desc, const char *type); 286 void snd_mtxfree(void *m); 287 void snd_mtxassert(void *m); 288 #define snd_mtxlock(m) mtx_lock(m) 289 #define snd_mtxunlock(m) mtx_unlock(m) 290 291 int sndstat_register(device_t dev, char *str); 292 int sndstat_unregister(device_t dev); 293 294 /* These are the function codes assigned to the children of sound cards. */ 295 enum { 296 SCF_PCM, 297 SCF_MIDI, 298 SCF_SYNTH, 299 }; 300 301 /* 302 * This is the device information struct, used by a bridge device to pass the 303 * device function code to the children. 304 */ 305 struct sndcard_func { 306 int func; /* The function code. */ 307 void *varinfo; /* Bridge-specific information. */ 308 }; 309 310 /* 311 * this is rather kludgey- we need to duplicate these struct def'ns from sound.c 312 * so that the macro versions of pcm_{,un}lock can dereference them. 313 * we also have to do this now makedev() has gone away. 314 */ 315 316 struct snddev_info { 317 struct { 318 struct { 319 SLIST_HEAD(, pcm_channel) head; 320 struct { 321 SLIST_HEAD(, pcm_channel) head; 322 } busy; 323 struct { 324 SLIST_HEAD(, pcm_channel) head; 325 } opened; 326 } pcm; 327 } channels; 328 unsigned playcount, reccount, pvchancount, rvchancount; 329 unsigned flags; 330 unsigned int bufsz; 331 void *devinfo; 332 device_t dev; 333 char status[SND_STATUSLEN]; 334 struct mtx *lock; 335 struct cdev *mixer_dev; 336 struct cdev *dsp_dev; 337 uint32_t pvchanrate, pvchanformat; 338 uint32_t rvchanrate, rvchanformat; 339 int32_t eqpreamp; 340 struct sysctl_ctx_list play_sysctl_ctx, rec_sysctl_ctx; 341 struct sysctl_oid *play_sysctl_tree, *rec_sysctl_tree; 342 struct cv cv; 343 }; 344 345 void sound_oss_sysinfo(oss_sysinfo *); 346 int sound_oss_card_info(oss_card_info *); 347 348 #define PCM_MODE_MIXER 0x01 349 #define PCM_MODE_PLAY 0x02 350 #define PCM_MODE_REC 0x04 351 352 #define PCM_LOCKOWNED(d) mtx_owned((d)->lock) 353 #define PCM_LOCK(d) mtx_lock((d)->lock) 354 #define PCM_UNLOCK(d) mtx_unlock((d)->lock) 355 #define PCM_TRYLOCK(d) mtx_trylock((d)->lock) 356 #define PCM_LOCKASSERT(d) mtx_assert((d)->lock, MA_OWNED) 357 #define PCM_UNLOCKASSERT(d) mtx_assert((d)->lock, MA_NOTOWNED) 358 359 /* 360 * For PCM_[WAIT | ACQUIRE | RELEASE], be sure to surround these 361 * with PCM_LOCK/UNLOCK() sequence, or I'll come to gnaw upon you! 362 */ 363 #ifdef SND_DIAGNOSTIC 364 #define PCM_WAIT(x) do { \ 365 if (!PCM_LOCKOWNED(x)) \ 366 panic("%s(%d): [PCM WAIT] Mutex not owned!", \ 367 __func__, __LINE__); \ 368 while ((x)->flags & SD_F_BUSY) { \ 369 if (snd_verbose > 3) \ 370 device_printf((x)->dev, \ 371 "%s(%d): [PCM WAIT] calling cv_wait().\n", \ 372 __func__, __LINE__); \ 373 cv_wait(&(x)->cv, (x)->lock); \ 374 } \ 375 } while (0) 376 377 #define PCM_ACQUIRE(x) do { \ 378 if (!PCM_LOCKOWNED(x)) \ 379 panic("%s(%d): [PCM ACQUIRE] Mutex not owned!", \ 380 __func__, __LINE__); \ 381 if ((x)->flags & SD_F_BUSY) \ 382 panic("%s(%d): [PCM ACQUIRE] " \ 383 "Trying to acquire BUSY cv!", __func__, __LINE__); \ 384 (x)->flags |= SD_F_BUSY; \ 385 } while (0) 386 387 #define PCM_RELEASE(x) do { \ 388 if (!PCM_LOCKOWNED(x)) \ 389 panic("%s(%d): [PCM RELEASE] Mutex not owned!", \ 390 __func__, __LINE__); \ 391 if ((x)->flags & SD_F_BUSY) { \ 392 (x)->flags &= ~SD_F_BUSY; \ 393 if ((x)->cv.cv_waiters != 0) { \ 394 if ((x)->cv.cv_waiters > 1 && snd_verbose > 3) \ 395 device_printf((x)->dev, \ 396 "%s(%d): [PCM RELEASE] " \ 397 "cv_waiters=%d > 1!\n", \ 398 __func__, __LINE__, \ 399 (x)->cv.cv_waiters); \ 400 cv_broadcast(&(x)->cv); \ 401 } \ 402 } else \ 403 panic("%s(%d): [PCM RELEASE] Releasing non-BUSY cv!", \ 404 __func__, __LINE__); \ 405 } while (0) 406 407 /* Quick version, for shorter path. */ 408 #define PCM_ACQUIRE_QUICK(x) do { \ 409 if (PCM_LOCKOWNED(x)) \ 410 panic("%s(%d): [PCM ACQUIRE QUICK] Mutex owned!", \ 411 __func__, __LINE__); \ 412 PCM_LOCK(x); \ 413 PCM_WAIT(x); \ 414 PCM_ACQUIRE(x); \ 415 PCM_UNLOCK(x); \ 416 } while (0) 417 418 #define PCM_RELEASE_QUICK(x) do { \ 419 if (PCM_LOCKOWNED(x)) \ 420 panic("%s(%d): [PCM RELEASE QUICK] Mutex owned!", \ 421 __func__, __LINE__); \ 422 PCM_LOCK(x); \ 423 PCM_RELEASE(x); \ 424 PCM_UNLOCK(x); \ 425 } while (0) 426 427 #define PCM_BUSYASSERT(x) do { \ 428 if (!((x) != NULL && ((x)->flags & SD_F_BUSY))) \ 429 panic("%s(%d): [PCM BUSYASSERT] " \ 430 "Failed, snddev_info=%p", __func__, __LINE__, x); \ 431 } while (0) 432 433 #define PCM_GIANT_ENTER(x) do { \ 434 int _pcm_giant = 0; \ 435 if (PCM_LOCKOWNED(x)) \ 436 panic("%s(%d): [GIANT ENTER] PCM lock owned!", \ 437 __func__, __LINE__); \ 438 if (mtx_owned(&Giant) != 0 && snd_verbose > 3) \ 439 device_printf((x)->dev, \ 440 "%s(%d): [GIANT ENTER] Giant owned!\n", \ 441 __func__, __LINE__); \ 442 if (!((x)->flags & SD_F_MPSAFE) && mtx_owned(&Giant) == 0) \ 443 do { \ 444 mtx_lock(&Giant); \ 445 _pcm_giant = 1; \ 446 } while (0) 447 448 #define PCM_GIANT_EXIT(x) do { \ 449 if (PCM_LOCKOWNED(x)) \ 450 panic("%s(%d): [GIANT EXIT] PCM lock owned!", \ 451 __func__, __LINE__); \ 452 if (!(_pcm_giant == 0 || _pcm_giant == 1)) \ 453 panic("%s(%d): [GIANT EXIT] _pcm_giant screwed!", \ 454 __func__, __LINE__); \ 455 if ((x)->flags & SD_F_MPSAFE) { \ 456 if (_pcm_giant == 1) \ 457 panic("%s(%d): [GIANT EXIT] MPSAFE Giant?", \ 458 __func__, __LINE__); \ 459 if (mtx_owned(&Giant) != 0 && snd_verbose > 3) \ 460 device_printf((x)->dev, \ 461 "%s(%d): [GIANT EXIT] Giant owned!\n", \ 462 __func__, __LINE__); \ 463 } \ 464 if (_pcm_giant != 0) { \ 465 if (mtx_owned(&Giant) == 0) \ 466 panic("%s(%d): [GIANT EXIT] Giant not owned!", \ 467 __func__, __LINE__); \ 468 _pcm_giant = 0; \ 469 mtx_unlock(&Giant); \ 470 } \ 471 } while (0) 472 #else /* !SND_DIAGNOSTIC */ 473 #define PCM_WAIT(x) do { \ 474 PCM_LOCKASSERT(x); \ 475 while ((x)->flags & SD_F_BUSY) \ 476 cv_wait(&(x)->cv, (x)->lock); \ 477 } while (0) 478 479 #define PCM_ACQUIRE(x) do { \ 480 PCM_LOCKASSERT(x); \ 481 KASSERT(!((x)->flags & SD_F_BUSY), \ 482 ("%s(%d): [PCM ACQUIRE] Trying to acquire BUSY cv!", \ 483 __func__, __LINE__)); \ 484 (x)->flags |= SD_F_BUSY; \ 485 } while (0) 486 487 #define PCM_RELEASE(x) do { \ 488 PCM_LOCKASSERT(x); \ 489 KASSERT((x)->flags & SD_F_BUSY, \ 490 ("%s(%d): [PCM RELEASE] Releasing non-BUSY cv!", \ 491 __func__, __LINE__)); \ 492 (x)->flags &= ~SD_F_BUSY; \ 493 if ((x)->cv.cv_waiters != 0) \ 494 cv_broadcast(&(x)->cv); \ 495 } while (0) 496 497 /* Quick version, for shorter path. */ 498 #define PCM_ACQUIRE_QUICK(x) do { \ 499 PCM_UNLOCKASSERT(x); \ 500 PCM_LOCK(x); \ 501 PCM_WAIT(x); \ 502 PCM_ACQUIRE(x); \ 503 PCM_UNLOCK(x); \ 504 } while (0) 505 506 #define PCM_RELEASE_QUICK(x) do { \ 507 PCM_UNLOCKASSERT(x); \ 508 PCM_LOCK(x); \ 509 PCM_RELEASE(x); \ 510 PCM_UNLOCK(x); \ 511 } while (0) 512 513 #define PCM_BUSYASSERT(x) KASSERT(x != NULL && \ 514 ((x)->flags & SD_F_BUSY), \ 515 ("%s(%d): [PCM BUSYASSERT] " \ 516 "Failed, snddev_info=%p", \ 517 __func__, __LINE__, x)) 518 519 #define PCM_GIANT_ENTER(x) do { \ 520 int _pcm_giant = 0; \ 521 PCM_UNLOCKASSERT(x); \ 522 if (!((x)->flags & SD_F_MPSAFE) && mtx_owned(&Giant) == 0) \ 523 do { \ 524 mtx_lock(&Giant); \ 525 _pcm_giant = 1; \ 526 } while (0) 527 528 #define PCM_GIANT_EXIT(x) do { \ 529 PCM_UNLOCKASSERT(x); \ 530 KASSERT(_pcm_giant == 0 || _pcm_giant == 1, \ 531 ("%s(%d): [GIANT EXIT] _pcm_giant screwed!", \ 532 __func__, __LINE__)); \ 533 KASSERT(!((x)->flags & SD_F_MPSAFE) || \ 534 (((x)->flags & SD_F_MPSAFE) && _pcm_giant == 0), \ 535 ("%s(%d): [GIANT EXIT] MPSAFE Giant?", \ 536 __func__, __LINE__)); \ 537 if (_pcm_giant != 0) { \ 538 mtx_assert(&Giant, MA_OWNED); \ 539 _pcm_giant = 0; \ 540 mtx_unlock(&Giant); \ 541 } \ 542 } while (0) 543 #endif /* SND_DIAGNOSTIC */ 544 545 #define PCM_GIANT_LEAVE(x) \ 546 PCM_GIANT_EXIT(x); \ 547 } while (0) 548 549 #endif /* _KERNEL */ 550 551 #endif /* _OS_H_ */ 552