Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/sound/pcm/sound.h
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1 /*- 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 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 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. 15 * 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 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 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/ioccom.h> 42 #include <sys/filio.h> 43 #include <sys/sockio.h> 44 #include <sys/fcntl.h> 45 #include <sys/selinfo.h> 46 #include <sys/proc.h> 47 #include <sys/kernel.h> /* for DATA_SET */ 48 #include <sys/module.h> 49 #include <sys/conf.h> 50 #include <sys/file.h> 51 #include <sys/uio.h> 52 #include <sys/syslog.h> 53 #include <sys/errno.h> 54 #include <sys/malloc.h> 55 #include <sys/bus.h> 56 #if __FreeBSD_version < 500000 57 #include <sys/buf.h> 58 #endif 59 #include <machine/resource.h> 60 #include <machine/bus.h> 61 #include <sys/rman.h> 62 #include <sys/limits.h> 63 #include <sys/mman.h> 64 #include <sys/poll.h> 65 #include <sys/sbuf.h> 66 #include <sys/soundcard.h> 67 #include <sys/sysctl.h> 68 #include <sys/kobj.h> 69 #include <vm/vm.h> 70 #include <vm/pmap.h> 71 72 #include <sys/lock.h> 73 #include <sys/mutex.h> 74 #include <sys/condvar.h> 75 76 #ifndef KOBJMETHOD_END 77 #define KOBJMETHOD_END { NULL, NULL } 78 #endif 79 80 struct pcm_channel; 81 struct pcm_feeder; 82 struct snd_dbuf; 83 struct snd_mixer; 84 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> 94 95 #define PCM_SOFTC_SIZE (sizeof(struct snddev_info)) 96 97 #define SND_STATUSLEN 64 98 99 #define SOUND_MODVER 5 100 101 #define SOUND_MINVER SOUND_MODVER 102 #define SOUND_PREFVER SOUND_MODVER 103 #define SOUND_MAXVER SOUND_MODVER 104 105 /* 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 109 * next 100 years... 110 */ 111 112 #define PCMMAXUNIT (snd_max_u()) 113 #define PCMMAXDEV (snd_max_d()) 114 #define PCMMAXCHAN (snd_max_c()) 115 116 #define PCMMAXCLONE PCMMAXCHAN 117 118 #define PCMUNIT(x) (snd_unit2u(dev2unit(x))) 119 #define PCMDEV(x) (snd_unit2d(dev2unit(x))) 120 #define PCMCHAN(x) (snd_unit2c(dev2unit(x))) 121 122 /* XXX unit2minor compat */ 123 #if __FreeBSD_version >= 800062 124 #define PCMMINOR(x) (x) 125 #else 126 #define PCMMINOR(x) unit2minor(x) 127 #endif 128 129 /* 130 * By design, limit possible channels for each direction. 131 */ 132 #define SND_MAXHWCHAN 256 133 #define SND_MAXVCHANS SND_MAXHWCHAN 134 135 #define SD_F_SIMPLEX 0x00000001 136 #define SD_F_AUTOVCHAN 0x00000002 137 #define SD_F_SOFTPCMVOL 0x00000004 138 #define SD_F_DYING 0x00000008 139 #define SD_F_DETACHING 0x00000010 140 #define SD_F_BUSY 0x00000020 141 #define SD_F_MPSAFE 0x00000040 142 #define SD_F_REGISTERED 0x00000080 143 #define SD_F_BITPERFECT 0x00000100 144 #define SD_F_VPC 0x00000200 /* volume-per-channel */ 145 #define SD_F_EQ 0x00000400 /* EQ */ 146 #define SD_F_EQ_ENABLED 0x00000800 /* EQ enabled */ 147 #define SD_F_EQ_BYPASSED 0x00001000 /* EQ bypassed */ 148 #define SD_F_EQ_PC 0x00002000 /* EQ per-channel */ 149 150 #define SD_F_EQ_DEFAULT (SD_F_EQ | SD_F_EQ_ENABLED) 151 #define SD_F_EQ_MASK (SD_F_EQ | SD_F_EQ_ENABLED | \ 152 SD_F_EQ_BYPASSED | SD_F_EQ_PC) 153 154 #define SD_F_PRIO_RD 0x10000000 155 #define SD_F_PRIO_WR 0x20000000 156 #define SD_F_PRIO_SET (SD_F_PRIO_RD | SD_F_PRIO_WR) 157 #define SD_F_DIR_SET 0x40000000 158 #define SD_F_TRANSIENT 0xf0000000 159 160 #define SD_F_BITS "\020" \ 161 "\001SIMPLEX" \ 162 "\002AUTOVCHAN" \ 163 "\003SOFTPCMVOL" \ 164 "\004DYING" \ 165 "\005DETACHING" \ 166 "\006BUSY" \ 167 "\007MPSAFE" \ 168 "\010REGISTERED" \ 169 "\011BITPERFECT" \ 170 "\012VPC" \ 171 "\013EQ" \ 172 "\014EQ_ENABLED" \ 173 "\015EQ_BYPASSED" \ 174 "\016EQ_PC" \ 175 "\035PRIO_RD" \ 176 "\036PRIO_WR" \ 177 "\037DIR_SET" 178 179 #define PCM_ALIVE(x) ((x) != NULL && (x)->lock != NULL && \ 180 !((x)->flags & SD_F_DYING)) 181 #define PCM_REGISTERED(x) (PCM_ALIVE(x) && \ 182 ((x)->flags & SD_F_REGISTERED)) 183 184 #define PCM_DETACHING(x) ((x)->flags & SD_F_DETACHING) 185 186 /* many variables should be reduced to a range. Here define a macro */ 187 #define RANGE(var, low, high) (var) = \ 188 (((var)<(low))? (low) : ((var)>(high))? (high) : (var)) 189 #define DSP_BUFFSIZE (8192) 190 191 /* make figuring out what a format is easier. got AFMT_STEREO already */ 192 #define AFMT_32BIT (AFMT_S32_LE | AFMT_S32_BE | AFMT_U32_LE | AFMT_U32_BE) 193 #define AFMT_24BIT (AFMT_S24_LE | AFMT_S24_BE | AFMT_U24_LE | AFMT_U24_BE) 194 #define AFMT_16BIT (AFMT_S16_LE | AFMT_S16_BE | AFMT_U16_LE | AFMT_U16_BE) 195 #define AFMT_G711 (AFMT_MU_LAW | AFMT_A_LAW) 196 #define AFMT_8BIT (AFMT_G711 | AFMT_U8 | AFMT_S8) 197 #define AFMT_SIGNED (AFMT_S32_LE | AFMT_S32_BE | AFMT_S24_LE | AFMT_S24_BE | \ 198 AFMT_S16_LE | AFMT_S16_BE | AFMT_S8) 199 #define AFMT_BIGENDIAN (AFMT_S32_BE | AFMT_U32_BE | AFMT_S24_BE | AFMT_U24_BE | \ 200 AFMT_S16_BE | AFMT_U16_BE) 201 202 #define AFMT_CONVERTIBLE (AFMT_8BIT | AFMT_16BIT | AFMT_24BIT | \ 203 AFMT_32BIT) 204 205 /* Supported vchan mixing formats */ 206 #define AFMT_VCHAN (AFMT_CONVERTIBLE & ~AFMT_G711) 207 208 #define AFMT_PASSTHROUGH AFMT_AC3 209 #define AFMT_PASSTHROUGH_RATE 48000 210 #define AFMT_PASSTHROUGH_CHANNEL 2 211 #define AFMT_PASSTHROUGH_EXTCHANNEL 0 212 213 /* 214 * We're simply using unused, contiguous bits from various AFMT_ definitions. 215 * ~(0xb00ff7ff) 216 */ 217 #define AFMT_ENCODING_MASK 0xf00fffff 218 #define AFMT_CHANNEL_MASK 0x01f00000 219 #define AFMT_CHANNEL_SHIFT 20 220 #define AFMT_EXTCHANNEL_MASK 0x0e000000 221 #define AFMT_EXTCHANNEL_SHIFT 25 222 223 #define AFMT_ENCODING(v) ((v) & AFMT_ENCODING_MASK) 224 225 #define AFMT_EXTCHANNEL(v) (((v) & AFMT_EXTCHANNEL_MASK) >> \ 226 AFMT_EXTCHANNEL_SHIFT) 227 228 #define AFMT_CHANNEL(v) (((v) & AFMT_CHANNEL_MASK) >> \ 229 AFMT_CHANNEL_SHIFT) 230 231 #define AFMT_BIT(v) (((v) & AFMT_32BIT) ? 32 : \ 232 (((v) & AFMT_24BIT) ? 24 : \ 233 ((((v) & AFMT_16BIT) || \ 234 ((v) & AFMT_PASSTHROUGH)) ? 16 : 8))) 235 236 #define AFMT_BPS(v) (AFMT_BIT(v) >> 3) 237 #define AFMT_ALIGN(v) (AFMT_BPS(v) * AFMT_CHANNEL(v)) 238 239 #define SND_FORMAT(f, c, e) (AFMT_ENCODING(f) | \ 240 (((c) << AFMT_CHANNEL_SHIFT) & \ 241 AFMT_CHANNEL_MASK) | \ 242 (((e) << AFMT_EXTCHANNEL_SHIFT) & \ 243 AFMT_EXTCHANNEL_MASK)) 244 245 #define AFMT_U8_NE AFMT_U8 246 #define AFMT_S8_NE AFMT_S8 247 248 #define AFMT_SIGNED_NE (AFMT_S8_NE | AFMT_S16_NE | AFMT_S24_NE | AFMT_S32_NE) 249 250 #define AFMT_NE (AFMT_SIGNED_NE | AFMT_U8_NE | AFMT_U16_NE | \ 251 AFMT_U24_NE | AFMT_U32_NE) 252 253 /* 254 * Minor numbers for the sound driver. 255 * 256 * Unfortunately Creative called the codec chip of SB as a DSP. For this 257 * reason the /dev/dsp is reserved for digitized audio use. There is a 258 * device for true DSP processors but it will be called something else. 259 * In v3.0 it's /dev/sndproc but this could be a temporary solution. 260 */ 261 262 #define SND_DEV_CTL 0 /* Control port /dev/mixer */ 263 #define SND_DEV_SEQ 1 /* Sequencer /dev/sequencer */ 264 #define SND_DEV_MIDIN 2 /* Raw midi access */ 265 #define SND_DEV_DSP 3 /* Digitized voice /dev/dsp */ 266 #define SND_DEV_AUDIO 4 /* Sparc compatible /dev/audio */ 267 #define SND_DEV_DSP16 5 /* Like /dev/dsp but 16 bits/sample */ 268 #define SND_DEV_STATUS 6 /* /dev/sndstat */ 269 /* #7 not in use now. */ 270 #define SND_DEV_SEQ2 8 /* /dev/sequencer, level 2 interface */ 271 #define SND_DEV_SNDPROC 9 /* /dev/sndproc for programmable devices */ 272 #define SND_DEV_PSS SND_DEV_SNDPROC /* ? */ 273 #define SND_DEV_NORESET 10 274 275 #define SND_DEV_DSPHW_PLAY 11 /* specific playback channel */ 276 #define SND_DEV_DSPHW_VPLAY 12 /* specific virtual playback channel */ 277 #define SND_DEV_DSPHW_REC 13 /* specific record channel */ 278 #define SND_DEV_DSPHW_VREC 14 /* specific virtual record channel */ 279 280 #define SND_DEV_DSPHW_CD 15 /* s16le/stereo 44100Hz CD */ 281 282 /* 283 * OSSv4 compatible device. For now, it serve no purpose and 284 * the cloning itself will forward the request to ordinary /dev/dsp 285 * instead. 286 */ 287 #define SND_DEV_DSP_MMAP 16 /* /dev/dsp_mmap */ 288 #define SND_DEV_DSP_AC3 17 /* /dev/dsp_ac3 */ 289 #define SND_DEV_DSP_MULTICH 18 /* /dev/dsp_multich */ 290 #define SND_DEV_DSP_SPDIFOUT 19 /* /dev/dsp_spdifout */ 291 #define SND_DEV_DSP_SPDIFIN 20 /* /dev/dsp_spdifin */ 292 293 #define SND_DEV_LAST SND_DEV_DSP_SPDIFIN 294 #define SND_DEV_MAX PCMMAXDEV 295 296 #define DSP_DEFAULT_SPEED 8000 297 298 #define ON 1 299 #define OFF 0 300 301 extern int pcm_veto_load; 302 extern int snd_unit; 303 extern int snd_maxautovchans; 304 extern int snd_verbose; 305 extern devclass_t pcm_devclass; 306 extern struct unrhdr *pcmsg_unrhdr; 307 308 /* 309 * some macros for debugging purposes 310 * DDB/DEB to enable/disable debugging stuff 311 * BVDDB to enable debugging when bootverbose 312 */ 313 #define BVDDB(x) if (bootverbose) x 314 315 #ifndef DEB 316 #define DEB(x) 317 #endif 318 319 SYSCTL_DECL(_hw_snd); 320 321 int pcm_setvchans(struct snddev_info *d, int direction, int newcnt, int num); 322 int pcm_chnalloc(struct snddev_info *d, struct pcm_channel **ch, int direction, 323 pid_t pid, char *comm, int devunit); 324 int pcm_chnrelease(struct pcm_channel *c); 325 int pcm_chnref(struct pcm_channel *c, int ref); 326 int pcm_inprog(struct snddev_info *d, int delta); 327 328 struct pcm_channel *pcm_chn_create(struct snddev_info *d, struct pcm_channel *parent, kobj_class_t cls, int dir, int num, void *devinfo); 329 int pcm_chn_destroy(struct pcm_channel *ch); 330 int pcm_chn_add(struct snddev_info *d, struct pcm_channel *ch); 331 int pcm_chn_remove(struct snddev_info *d, struct pcm_channel *ch); 332 333 int pcm_addchan(device_t dev, int dir, kobj_class_t cls, void *devinfo); 334 unsigned int pcm_getbuffersize(device_t dev, unsigned int minbufsz, unsigned int deflt, unsigned int maxbufsz); 335 int pcm_register(device_t dev, void *devinfo, int numplay, int numrec); 336 int pcm_unregister(device_t dev); 337 int pcm_setstatus(device_t dev, char *str); 338 u_int32_t pcm_getflags(device_t dev); 339 void pcm_setflags(device_t dev, u_int32_t val); 340 void *pcm_getdevinfo(device_t dev); 341 342 343 int snd_setup_intr(device_t dev, struct resource *res, int flags, 344 driver_intr_t hand, void *param, void **cookiep); 345 346 void *snd_mtxcreate(const char *desc, const char *type); 347 void snd_mtxfree(void *m); 348 void snd_mtxassert(void *m); 349 #define snd_mtxlock(m) mtx_lock(m) 350 #define snd_mtxunlock(m) mtx_unlock(m) 351 352 typedef int (*sndstat_handler)(struct sbuf *s, device_t dev, int verbose); 353 int sndstat_acquire(struct thread *td); 354 int sndstat_release(struct thread *td); 355 int sndstat_register(device_t dev, char *str, sndstat_handler handler); 356 int sndstat_registerfile(char *str); 357 int sndstat_unregister(device_t dev); 358 int sndstat_unregisterfile(char *str); 359 360 #define SND_DECLARE_FILE(version) \ 361 _SND_DECLARE_FILE(__LINE__, version) 362 363 #define _SND_DECLARE_FILE(uniq, version) \ 364 __SND_DECLARE_FILE(uniq, version) 365 366 #define __SND_DECLARE_FILE(uniq, version) \ 367 static char sndstat_vinfo[] = version; \ 368 SYSINIT(sdf_ ## uniq, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, sndstat_registerfile, sndstat_vinfo); \ 369 SYSUNINIT(sdf_ ## uniq, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, sndstat_unregisterfile, sndstat_vinfo); 370 371 /* usage of flags in device config entry (config file) */ 372 #define DV_F_DRQ_MASK 0x00000007 /* mask for secondary drq */ 373 #define DV_F_DUAL_DMA 0x00000010 /* set to use secondary dma channel */ 374 375 /* ought to be made obsolete but still used by mss */ 376 #define DV_F_DEV_MASK 0x0000ff00 /* force device type/class */ 377 #define DV_F_DEV_SHIFT 8 /* force device type/class */ 378 379 /* 380 * this is rather kludgey- we need to duplicate these struct def'ns from sound.c 381 * so that the macro versions of pcm_{,un}lock can dereference them. 382 * we also have to do this now makedev() has gone away. 383 */ 384 385 struct snddev_info { 386 struct { 387 struct { 388 SLIST_HEAD(, pcm_channel) head; 389 struct { 390 SLIST_HEAD(, pcm_channel) head; 391 } busy; 392 struct { 393 SLIST_HEAD(, pcm_channel) head; 394 } opened; 395 } pcm; 396 } channels; 397 TAILQ_HEAD(dsp_cdevinfo_linkhead, dsp_cdevinfo) dsp_cdevinfo_pool; 398 struct snd_clone *clones; 399 unsigned devcount, playcount, reccount, pvchancount, rvchancount ; 400 unsigned flags; 401 int inprog; 402 unsigned int bufsz; 403 void *devinfo; 404 device_t dev; 405 char status[SND_STATUSLEN]; 406 struct mtx *lock; 407 struct cdev *mixer_dev; 408 uint32_t pvchanrate, pvchanformat; 409 uint32_t rvchanrate, rvchanformat; 410 int32_t eqpreamp; 411 struct sysctl_ctx_list play_sysctl_ctx, rec_sysctl_ctx; 412 struct sysctl_oid *play_sysctl_tree, *rec_sysctl_tree; 413 struct cv cv; 414 }; 415 416 void sound_oss_sysinfo(oss_sysinfo *); 417 int sound_oss_card_info(oss_card_info *); 418 419 #define PCM_LOCKOWNED(d) mtx_owned((d)->lock) 420 #define PCM_LOCK(d) mtx_lock((d)->lock) 421 #define PCM_UNLOCK(d) mtx_unlock((d)->lock) 422 #define PCM_TRYLOCK(d) mtx_trylock((d)->lock) 423 #define PCM_LOCKASSERT(d) mtx_assert((d)->lock, MA_OWNED) 424 #define PCM_UNLOCKASSERT(d) mtx_assert((d)->lock, MA_NOTOWNED) 425 426 /* 427 * For PCM_[WAIT | ACQUIRE | RELEASE], be sure to surround these 428 * with PCM_LOCK/UNLOCK() sequence, or I'll come to gnaw upon you! 429 */ 430 #ifdef SND_DIAGNOSTIC 431 #define PCM_WAIT(x) do { \ 432 if (!PCM_LOCKOWNED(x)) \ 433 panic("%s(%d): [PCM WAIT] Mutex not owned!", \ 434 __func__, __LINE__); \ 435 while ((x)->flags & SD_F_BUSY) { \ 436 if (snd_verbose > 3) \ 437 device_printf((x)->dev, \ 438 "%s(%d): [PCM WAIT] calling cv_wait().\n", \ 439 __func__, __LINE__); \ 440 cv_wait(&(x)->cv, (x)->lock); \ 441 } \ 442 } while (0) 443 444 #define PCM_ACQUIRE(x) do { \ 445 if (!PCM_LOCKOWNED(x)) \ 446 panic("%s(%d): [PCM ACQUIRE] Mutex not owned!", \ 447 __func__, __LINE__); \ 448 if ((x)->flags & SD_F_BUSY) \ 449 panic("%s(%d): [PCM ACQUIRE] " \ 450 "Trying to acquire BUSY cv!", __func__, __LINE__); \ 451 (x)->flags |= SD_F_BUSY; \ 452 } while (0) 453 454 #define PCM_RELEASE(x) do { \ 455 if (!PCM_LOCKOWNED(x)) \ 456 panic("%s(%d): [PCM RELEASE] Mutex not owned!", \ 457 __func__, __LINE__); \ 458 if ((x)->flags & SD_F_BUSY) { \ 459 (x)->flags &= ~SD_F_BUSY; \ 460 if ((x)->cv.cv_waiters != 0) { \ 461 if ((x)->cv.cv_waiters > 1 && snd_verbose > 3) \ 462 device_printf((x)->dev, \ 463 "%s(%d): [PCM RELEASE] " \ 464 "cv_waiters=%d > 1!\n", \ 465 __func__, __LINE__, \ 466 (x)->cv.cv_waiters); \ 467 cv_broadcast(&(x)->cv); \ 468 } \ 469 } else \ 470 panic("%s(%d): [PCM RELEASE] Releasing non-BUSY cv!", \ 471 __func__, __LINE__); \ 472 } while (0) 473 474 /* Quick version, for shorter path. */ 475 #define PCM_ACQUIRE_QUICK(x) do { \ 476 if (PCM_LOCKOWNED(x)) \ 477 panic("%s(%d): [PCM ACQUIRE QUICK] Mutex owned!", \ 478 __func__, __LINE__); \ 479 PCM_LOCK(x); \ 480 PCM_WAIT(x); \ 481 PCM_ACQUIRE(x); \ 482 PCM_UNLOCK(x); \ 483 } while (0) 484 485 #define PCM_RELEASE_QUICK(x) do { \ 486 if (PCM_LOCKOWNED(x)) \ 487 panic("%s(%d): [PCM RELEASE QUICK] Mutex owned!", \ 488 __func__, __LINE__); \ 489 PCM_LOCK(x); \ 490 PCM_RELEASE(x); \ 491 PCM_UNLOCK(x); \ 492 } while (0) 493 494 #define PCM_BUSYASSERT(x) do { \ 495 if (!((x) != NULL && ((x)->flags & SD_F_BUSY))) \ 496 panic("%s(%d): [PCM BUSYASSERT] " \ 497 "Failed, snddev_info=%p", __func__, __LINE__, x); \ 498 } while (0) 499 500 #define PCM_GIANT_ENTER(x) do { \ 501 int _pcm_giant = 0; \ 502 if (PCM_LOCKOWNED(x)) \ 503 panic("%s(%d): [GIANT ENTER] PCM lock owned!", \ 504 __func__, __LINE__); \ 505 if (mtx_owned(&Giant) != 0 && snd_verbose > 3) \ 506 device_printf((x)->dev, \ 507 "%s(%d): [GIANT ENTER] Giant owned!\n", \ 508 __func__, __LINE__); \ 509 if (!((x)->flags & SD_F_MPSAFE) && mtx_owned(&Giant) == 0) \ 510 do { \ 511 mtx_lock(&Giant); \ 512 _pcm_giant = 1; \ 513 } while (0) 514 515 #define PCM_GIANT_EXIT(x) do { \ 516 if (PCM_LOCKOWNED(x)) \ 517 panic("%s(%d): [GIANT EXIT] PCM lock owned!", \ 518 __func__, __LINE__); \ 519 if (!(_pcm_giant == 0 || _pcm_giant == 1)) \ 520 panic("%s(%d): [GIANT EXIT] _pcm_giant screwed!", \ 521 __func__, __LINE__); \ 522 if ((x)->flags & SD_F_MPSAFE) { \ 523 if (_pcm_giant == 1) \ 524 panic("%s(%d): [GIANT EXIT] MPSAFE Giant?", \ 525 __func__, __LINE__); \ 526 if (mtx_owned(&Giant) != 0 && snd_verbose > 3) \ 527 device_printf((x)->dev, \ 528 "%s(%d): [GIANT EXIT] Giant owned!\n", \ 529 __func__, __LINE__); \ 530 } \ 531 if (_pcm_giant != 0) { \ 532 if (mtx_owned(&Giant) == 0) \ 533 panic("%s(%d): [GIANT EXIT] Giant not owned!", \ 534 __func__, __LINE__); \ 535 _pcm_giant = 0; \ 536 mtx_unlock(&Giant); \ 537 } \ 538 } while (0) 539 #else /* SND_DIAGNOSTIC */ 540 #define PCM_WAIT(x) do { \ 541 PCM_LOCKASSERT(x); \ 542 while ((x)->flags & SD_F_BUSY) \ 543 cv_wait(&(x)->cv, (x)->lock); \ 544 } while (0) 545 546 #define PCM_ACQUIRE(x) do { \ 547 PCM_LOCKASSERT(x); \ 548 KASSERT(!((x)->flags & SD_F_BUSY), \ 549 ("%s(%d): [PCM ACQUIRE] Trying to acquire BUSY cv!", \ 550 __func__, __LINE__)); \ 551 (x)->flags |= SD_F_BUSY; \ 552 } while (0) 553 554 #define PCM_RELEASE(x) do { \ 555 PCM_LOCKASSERT(x); \ 556 KASSERT((x)->flags & SD_F_BUSY, \ 557 ("%s(%d): [PCM RELEASE] Releasing non-BUSY cv!", \ 558 __func__, __LINE__)); \ 559 (x)->flags &= ~SD_F_BUSY; \ 560 if ((x)->cv.cv_waiters != 0) \ 561 cv_broadcast(&(x)->cv); \ 562 } while (0) 563 564 /* Quick version, for shorter path. */ 565 #define PCM_ACQUIRE_QUICK(x) do { \ 566 PCM_UNLOCKASSERT(x); \ 567 PCM_LOCK(x); \ 568 PCM_WAIT(x); \ 569 PCM_ACQUIRE(x); \ 570 PCM_UNLOCK(x); \ 571 } while (0) 572 573 #define PCM_RELEASE_QUICK(x) do { \ 574 PCM_UNLOCKASSERT(x); \ 575 PCM_LOCK(x); \ 576 PCM_RELEASE(x); \ 577 PCM_UNLOCK(x); \ 578 } while (0) 579 580 #define PCM_BUSYASSERT(x) KASSERT(x != NULL && \ 581 ((x)->flags & SD_F_BUSY), \ 582 ("%s(%d): [PCM BUSYASSERT] " \ 583 "Failed, snddev_info=%p", \ 584 __func__, __LINE__, x)) 585 586 #define PCM_GIANT_ENTER(x) do { \ 587 int _pcm_giant = 0; \ 588 PCM_UNLOCKASSERT(x); \ 589 if (!((x)->flags & SD_F_MPSAFE) && mtx_owned(&Giant) == 0) \ 590 do { \ 591 mtx_lock(&Giant); \ 592 _pcm_giant = 1; \ 593 } while (0) 594 595 #define PCM_GIANT_EXIT(x) do { \ 596 PCM_UNLOCKASSERT(x); \ 597 KASSERT(_pcm_giant == 0 || _pcm_giant == 1, \ 598 ("%s(%d): [GIANT EXIT] _pcm_giant screwed!", \ 599 __func__, __LINE__)); \ 600 KASSERT(!((x)->flags & SD_F_MPSAFE) || \ 601 (((x)->flags & SD_F_MPSAFE) && _pcm_giant == 0), \ 602 ("%s(%d): [GIANT EXIT] MPSAFE Giant?", \ 603 __func__, __LINE__)); \ 604 if (_pcm_giant != 0) { \ 605 mtx_assert(&Giant, MA_OWNED); \ 606 _pcm_giant = 0; \ 607 mtx_unlock(&Giant); \ 608 } \ 609 } while (0) 610 #endif /* !SND_DIAGNOSTIC */ 611 612 #define PCM_GIANT_LEAVE(x) \ 613 PCM_GIANT_EXIT(x); \ 614 } while (0) 615 616 #ifdef KLD_MODULE 617 #define PCM_KLDSTRING(a) ("kld " # a) 618 #else 619 #define PCM_KLDSTRING(a) "" 620 #endif 621 622 #endif /* _KERNEL */ 623 624 #endif /* _OS_H_ */
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