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 #include <machine/resource.h> 57 #include <machine/bus.h> 58 #include <sys/rman.h> 59 #include <sys/limits.h> 60 #include <sys/mman.h> 61 #include <sys/poll.h> 62 #include <sys/sbuf.h> 63 #include <sys/soundcard.h> 64 #include <sys/sysctl.h> 65 #include <sys/kobj.h> 66 #include <vm/vm.h> 67 #include <vm/pmap.h> 68 69 #include <sys/lock.h> 70 #include <sys/mutex.h> 71 #include <sys/condvar.h> 72 73 #ifndef KOBJMETHOD_END 74 #define KOBJMETHOD_END { NULL, NULL } 75 #endif 76 77 struct pcm_channel; 78 struct pcm_feeder; 79 struct snd_dbuf; 80 struct snd_mixer; 81 82 #include <dev/sound/pcm/buffer.h> 83 #include <dev/sound/pcm/matrix.h> 84 #include <dev/sound/pcm/matrix_map.h> 85 #include <dev/sound/pcm/channel.h> 86 #include <dev/sound/pcm/feeder.h> 87 #include <dev/sound/pcm/mixer.h> 88 #include <dev/sound/pcm/dsp.h> 89 #include <dev/sound/clone.h> 90 #include <dev/sound/unit.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 * We're abusing the fact that MAXMINOR still have enough room 104 * for our bit twiddling and nobody ever need 512 unique soundcards, 105 * 32 unique device types and 1024 unique cloneable devices for the 106 * next 100 years... 107 */ 108 109 #define PCMMAXUNIT (snd_max_u()) 110 #define PCMMAXDEV (snd_max_d()) 111 #define PCMMAXCHAN (snd_max_c()) 112 113 #define PCMMAXCLONE PCMMAXCHAN 114 115 #define PCMUNIT(x) (snd_unit2u(dev2unit(x))) 116 #define PCMDEV(x) (snd_unit2d(dev2unit(x))) 117 #define PCMCHAN(x) (snd_unit2c(dev2unit(x))) 118 119 /* XXX unit2minor compat */ 120 #define PCMMINOR(x) (x) 121 122 /* 123 * By design, limit possible channels for each direction. 124 */ 125 #define SND_MAXHWCHAN 256 126 #define SND_MAXVCHANS SND_MAXHWCHAN 127 128 #define SD_F_SIMPLEX 0x00000001 129 #define SD_F_AUTOVCHAN 0x00000002 130 #define SD_F_SOFTPCMVOL 0x00000004 131 #define SD_F_DYING 0x00000008 132 #define SD_F_DETACHING 0x00000010 133 #define SD_F_BUSY 0x00000020 134 #define SD_F_MPSAFE 0x00000040 135 #define SD_F_REGISTERED 0x00000080 136 #define SD_F_BITPERFECT 0x00000100 137 #define SD_F_VPC 0x00000200 /* volume-per-channel */ 138 #define SD_F_EQ 0x00000400 /* EQ */ 139 #define SD_F_EQ_ENABLED 0x00000800 /* EQ enabled */ 140 #define SD_F_EQ_BYPASSED 0x00001000 /* EQ bypassed */ 141 #define SD_F_EQ_PC 0x00002000 /* EQ per-channel */ 142 143 #define SD_F_EQ_DEFAULT (SD_F_EQ | SD_F_EQ_ENABLED) 144 #define SD_F_EQ_MASK (SD_F_EQ | SD_F_EQ_ENABLED | \ 145 SD_F_EQ_BYPASSED | SD_F_EQ_PC) 146 147 #define SD_F_PRIO_RD 0x10000000 148 #define SD_F_PRIO_WR 0x20000000 149 #define SD_F_PRIO_SET (SD_F_PRIO_RD | SD_F_PRIO_WR) 150 #define SD_F_DIR_SET 0x40000000 151 #define SD_F_TRANSIENT 0xf0000000 152 153 #define SD_F_BITS "\020" \ 154 "\001SIMPLEX" \ 155 "\002AUTOVCHAN" \ 156 "\003SOFTPCMVOL" \ 157 "\004DYING" \ 158 "\005DETACHING" \ 159 "\006BUSY" \ 160 "\007MPSAFE" \ 161 "\010REGISTERED" \ 162 "\011BITPERFECT" \ 163 "\012VPC" \ 164 "\013EQ" \ 165 "\014EQ_ENABLED" \ 166 "\015EQ_BYPASSED" \ 167 "\016EQ_PC" \ 168 "\035PRIO_RD" \ 169 "\036PRIO_WR" \ 170 "\037DIR_SET" 171 172 #define PCM_ALIVE(x) ((x) != NULL && (x)->lock != NULL && \ 173 !((x)->flags & SD_F_DYING)) 174 #define PCM_REGISTERED(x) (PCM_ALIVE(x) && \ 175 ((x)->flags & SD_F_REGISTERED)) 176 177 #define PCM_DETACHING(x) ((x)->flags & SD_F_DETACHING) 178 179 /* many variables should be reduced to a range. Here define a macro */ 180 #define RANGE(var, low, high) (var) = \ 181 (((var)<(low))? (low) : ((var)>(high))? (high) : (var)) 182 #define DSP_BUFFSIZE (8192) 183 184 /* make figuring out what a format is easier. got AFMT_STEREO already */ 185 #define AFMT_32BIT (AFMT_S32_LE | AFMT_S32_BE | AFMT_U32_LE | AFMT_U32_BE) 186 #define AFMT_24BIT (AFMT_S24_LE | AFMT_S24_BE | AFMT_U24_LE | AFMT_U24_BE) 187 #define AFMT_16BIT (AFMT_S16_LE | AFMT_S16_BE | AFMT_U16_LE | AFMT_U16_BE) 188 #define AFMT_G711 (AFMT_MU_LAW | AFMT_A_LAW) 189 #define AFMT_8BIT (AFMT_G711 | AFMT_U8 | AFMT_S8) 190 #define AFMT_SIGNED (AFMT_S32_LE | AFMT_S32_BE | AFMT_S24_LE | AFMT_S24_BE | \ 191 AFMT_S16_LE | AFMT_S16_BE | AFMT_S8) 192 #define AFMT_BIGENDIAN (AFMT_S32_BE | AFMT_U32_BE | AFMT_S24_BE | AFMT_U24_BE | \ 193 AFMT_S16_BE | AFMT_U16_BE) 194 195 #define AFMT_CONVERTIBLE (AFMT_8BIT | AFMT_16BIT | AFMT_24BIT | \ 196 AFMT_32BIT) 197 198 /* Supported vchan mixing formats */ 199 #define AFMT_VCHAN (AFMT_CONVERTIBLE & ~AFMT_G711) 200 201 #define AFMT_PASSTHROUGH AFMT_AC3 202 #define AFMT_PASSTHROUGH_RATE 48000 203 #define AFMT_PASSTHROUGH_CHANNEL 2 204 #define AFMT_PASSTHROUGH_EXTCHANNEL 0 205 206 /* 207 * We're simply using unused, contiguous bits from various AFMT_ definitions. 208 * ~(0xb00ff7ff) 209 */ 210 #define AFMT_ENCODING_MASK 0xf00fffff 211 #define AFMT_CHANNEL_MASK 0x07f00000 212 #define AFMT_CHANNEL_SHIFT 20 213 #define AFMT_CHANNEL_MAX 0x7f 214 #define AFMT_EXTCHANNEL_MASK 0x08000000 215 #define AFMT_EXTCHANNEL_SHIFT 27 216 #define AFMT_EXTCHANNEL_MAX 1 217 218 #define AFMT_ENCODING(v) ((v) & AFMT_ENCODING_MASK) 219 220 #define AFMT_EXTCHANNEL(v) (((v) & AFMT_EXTCHANNEL_MASK) >> \ 221 AFMT_EXTCHANNEL_SHIFT) 222 223 #define AFMT_CHANNEL(v) (((v) & AFMT_CHANNEL_MASK) >> \ 224 AFMT_CHANNEL_SHIFT) 225 226 #define AFMT_BIT(v) (((v) & AFMT_32BIT) ? 32 : \ 227 (((v) & AFMT_24BIT) ? 24 : \ 228 ((((v) & AFMT_16BIT) || \ 229 ((v) & AFMT_PASSTHROUGH)) ? 16 : 8))) 230 231 #define AFMT_BPS(v) (AFMT_BIT(v) >> 3) 232 #define AFMT_ALIGN(v) (AFMT_BPS(v) * AFMT_CHANNEL(v)) 233 234 #define SND_FORMAT(f, c, e) (AFMT_ENCODING(f) | \ 235 (((c) << AFMT_CHANNEL_SHIFT) & \ 236 AFMT_CHANNEL_MASK) | \ 237 (((e) << AFMT_EXTCHANNEL_SHIFT) & \ 238 AFMT_EXTCHANNEL_MASK)) 239 240 #define AFMT_U8_NE AFMT_U8 241 #define AFMT_S8_NE AFMT_S8 242 243 #define AFMT_SIGNED_NE (AFMT_S8_NE | AFMT_S16_NE | AFMT_S24_NE | AFMT_S32_NE) 244 245 #define AFMT_NE (AFMT_SIGNED_NE | AFMT_U8_NE | AFMT_U16_NE | \ 246 AFMT_U24_NE | AFMT_U32_NE) 247 248 /* 249 * Minor numbers for the sound driver. 250 * 251 * Unfortunately Creative called the codec chip of SB as a DSP. For this 252 * reason the /dev/dsp is reserved for digitized audio use. There is a 253 * device for true DSP processors but it will be called something else. 254 * In v3.0 it's /dev/sndproc but this could be a temporary solution. 255 */ 256 257 #define SND_DEV_CTL 0 /* Control port /dev/mixer */ 258 #define SND_DEV_SEQ 1 /* Sequencer /dev/sequencer */ 259 #define SND_DEV_MIDIN 2 /* Raw midi access */ 260 #define SND_DEV_DSP 3 /* Digitized voice /dev/dsp */ 261 #define SND_DEV_AUDIO 4 /* Sparc compatible /dev/audio */ 262 #define SND_DEV_DSP16 5 /* Like /dev/dsp but 16 bits/sample */ 263 #define SND_DEV_STATUS 6 /* /dev/sndstat */ 264 /* #7 not in use now. */ 265 #define SND_DEV_SEQ2 8 /* /dev/sequencer, level 2 interface */ 266 #define SND_DEV_SNDPROC 9 /* /dev/sndproc for programmable devices */ 267 #define SND_DEV_PSS SND_DEV_SNDPROC /* ? */ 268 #define SND_DEV_NORESET 10 269 270 #define SND_DEV_DSPHW_PLAY 11 /* specific playback channel */ 271 #define SND_DEV_DSPHW_VPLAY 12 /* specific virtual playback channel */ 272 #define SND_DEV_DSPHW_REC 13 /* specific record channel */ 273 #define SND_DEV_DSPHW_VREC 14 /* specific virtual record channel */ 274 275 #define SND_DEV_DSPHW_CD 15 /* s16le/stereo 44100Hz CD */ 276 277 /* 278 * OSSv4 compatible device. For now, it serve no purpose and 279 * the cloning itself will forward the request to ordinary /dev/dsp 280 * instead. 281 */ 282 #define SND_DEV_DSP_MMAP 16 /* /dev/dsp_mmap */ 283 #define SND_DEV_DSP_AC3 17 /* /dev/dsp_ac3 */ 284 #define SND_DEV_DSP_MULTICH 18 /* /dev/dsp_multich */ 285 #define SND_DEV_DSP_SPDIFOUT 19 /* /dev/dsp_spdifout */ 286 #define SND_DEV_DSP_SPDIFIN 20 /* /dev/dsp_spdifin */ 287 288 #define SND_DEV_LAST SND_DEV_DSP_SPDIFIN 289 #define SND_DEV_MAX PCMMAXDEV 290 291 #define DSP_DEFAULT_SPEED 8000 292 293 #define ON 1 294 #define OFF 0 295 296 extern int pcm_veto_load; 297 extern int snd_unit; 298 extern int snd_maxautovchans; 299 extern int snd_verbose; 300 extern devclass_t pcm_devclass; 301 extern struct unrhdr *pcmsg_unrhdr; 302 303 /* 304 * some macros for debugging purposes 305 * DDB/DEB to enable/disable debugging stuff 306 * BVDDB to enable debugging when bootverbose 307 */ 308 #define BVDDB(x) if (bootverbose) x 309 310 #ifndef DEB 311 #define DEB(x) 312 #endif 313 314 SYSCTL_DECL(_hw_snd); 315 316 int pcm_setvchans(struct snddev_info *d, int direction, int newcnt, int num); 317 int pcm_chnalloc(struct snddev_info *d, struct pcm_channel **ch, int direction, 318 pid_t pid, char *comm, int devunit); 319 int pcm_chnrelease(struct pcm_channel *c); 320 int pcm_chnref(struct pcm_channel *c, int ref); 321 int pcm_inprog(struct snddev_info *d, int delta); 322 323 struct pcm_channel *pcm_chn_create(struct snddev_info *d, struct pcm_channel *parent, kobj_class_t cls, int dir, int num, void *devinfo); 324 int pcm_chn_destroy(struct pcm_channel *ch); 325 int pcm_chn_add(struct snddev_info *d, struct pcm_channel *ch); 326 int pcm_chn_remove(struct snddev_info *d, struct pcm_channel *ch); 327 328 int pcm_addchan(device_t dev, int dir, kobj_class_t cls, void *devinfo); 329 unsigned int pcm_getbuffersize(device_t dev, unsigned int minbufsz, unsigned int deflt, unsigned int maxbufsz); 330 int pcm_register(device_t dev, void *devinfo, int numplay, int numrec); 331 int pcm_unregister(device_t dev); 332 int pcm_setstatus(device_t dev, char *str); 333 u_int32_t pcm_getflags(device_t dev); 334 void pcm_setflags(device_t dev, u_int32_t val); 335 void *pcm_getdevinfo(device_t dev); 336 337 338 int snd_setup_intr(device_t dev, struct resource *res, int flags, 339 driver_intr_t hand, void *param, void **cookiep); 340 341 void *snd_mtxcreate(const char *desc, const char *type); 342 void snd_mtxfree(void *m); 343 void snd_mtxassert(void *m); 344 #define snd_mtxlock(m) mtx_lock(m) 345 #define snd_mtxunlock(m) mtx_unlock(m) 346 347 typedef int (*sndstat_handler)(struct sbuf *s, device_t dev, int verbose); 348 int sndstat_register(device_t dev, char *str, sndstat_handler handler); 349 int sndstat_registerfile(char *str); 350 int sndstat_unregister(device_t dev); 351 int sndstat_unregisterfile(char *str); 352 353 #define SND_DECLARE_FILE(version) \ 354 _SND_DECLARE_FILE(__LINE__, version) 355 356 #define _SND_DECLARE_FILE(uniq, version) \ 357 __SND_DECLARE_FILE(uniq, version) 358 359 #define __SND_DECLARE_FILE(uniq, version) \ 360 static char sndstat_vinfo[] = version; \ 361 SYSINIT(sdf_ ## uniq, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, sndstat_registerfile, sndstat_vinfo); \ 362 SYSUNINIT(sdf_ ## uniq, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, sndstat_unregisterfile, sndstat_vinfo); 363 364 /* usage of flags in device config entry (config file) */ 365 #define DV_F_DRQ_MASK 0x00000007 /* mask for secondary drq */ 366 #define DV_F_DUAL_DMA 0x00000010 /* set to use secondary dma channel */ 367 368 /* ought to be made obsolete but still used by mss */ 369 #define DV_F_DEV_MASK 0x0000ff00 /* force device type/class */ 370 #define DV_F_DEV_SHIFT 8 /* force device type/class */ 371 372 /* 373 * this is rather kludgey- we need to duplicate these struct def'ns from sound.c 374 * so that the macro versions of pcm_{,un}lock can dereference them. 375 * we also have to do this now makedev() has gone away. 376 */ 377 378 struct snddev_info { 379 struct { 380 struct { 381 SLIST_HEAD(, pcm_channel) head; 382 struct { 383 SLIST_HEAD(, pcm_channel) head; 384 } busy; 385 struct { 386 SLIST_HEAD(, pcm_channel) head; 387 } opened; 388 } pcm; 389 } channels; 390 TAILQ_HEAD(dsp_cdevinfo_linkhead, dsp_cdevinfo) dsp_cdevinfo_pool; 391 struct snd_clone *clones; 392 unsigned devcount, playcount, reccount, pvchancount, rvchancount ; 393 unsigned flags; 394 int inprog; 395 unsigned int bufsz; 396 void *devinfo; 397 device_t dev; 398 char status[SND_STATUSLEN]; 399 struct mtx *lock; 400 struct cdev *mixer_dev; 401 uint32_t pvchanrate, pvchanformat; 402 uint32_t rvchanrate, rvchanformat; 403 int32_t eqpreamp; 404 struct sysctl_ctx_list play_sysctl_ctx, rec_sysctl_ctx; 405 struct sysctl_oid *play_sysctl_tree, *rec_sysctl_tree; 406 struct cv cv; 407 }; 408 409 void sound_oss_sysinfo(oss_sysinfo *); 410 int sound_oss_card_info(oss_card_info *); 411 412 #define PCM_LOCKOWNED(d) mtx_owned((d)->lock) 413 #define PCM_LOCK(d) mtx_lock((d)->lock) 414 #define PCM_UNLOCK(d) mtx_unlock((d)->lock) 415 #define PCM_TRYLOCK(d) mtx_trylock((d)->lock) 416 #define PCM_LOCKASSERT(d) mtx_assert((d)->lock, MA_OWNED) 417 #define PCM_UNLOCKASSERT(d) mtx_assert((d)->lock, MA_NOTOWNED) 418 419 /* 420 * For PCM_[WAIT | ACQUIRE | RELEASE], be sure to surround these 421 * with PCM_LOCK/UNLOCK() sequence, or I'll come to gnaw upon you! 422 */ 423 #ifdef SND_DIAGNOSTIC 424 #define PCM_WAIT(x) do { \ 425 if (!PCM_LOCKOWNED(x)) \ 426 panic("%s(%d): [PCM WAIT] Mutex not owned!", \ 427 __func__, __LINE__); \ 428 while ((x)->flags & SD_F_BUSY) { \ 429 if (snd_verbose > 3) \ 430 device_printf((x)->dev, \ 431 "%s(%d): [PCM WAIT] calling cv_wait().\n", \ 432 __func__, __LINE__); \ 433 cv_wait(&(x)->cv, (x)->lock); \ 434 } \ 435 } while (0) 436 437 #define PCM_ACQUIRE(x) do { \ 438 if (!PCM_LOCKOWNED(x)) \ 439 panic("%s(%d): [PCM ACQUIRE] Mutex not owned!", \ 440 __func__, __LINE__); \ 441 if ((x)->flags & SD_F_BUSY) \ 442 panic("%s(%d): [PCM ACQUIRE] " \ 443 "Trying to acquire BUSY cv!", __func__, __LINE__); \ 444 (x)->flags |= SD_F_BUSY; \ 445 } while (0) 446 447 #define PCM_RELEASE(x) do { \ 448 if (!PCM_LOCKOWNED(x)) \ 449 panic("%s(%d): [PCM RELEASE] Mutex not owned!", \ 450 __func__, __LINE__); \ 451 if ((x)->flags & SD_F_BUSY) { \ 452 (x)->flags &= ~SD_F_BUSY; \ 453 if ((x)->cv.cv_waiters != 0) { \ 454 if ((x)->cv.cv_waiters > 1 && snd_verbose > 3) \ 455 device_printf((x)->dev, \ 456 "%s(%d): [PCM RELEASE] " \ 457 "cv_waiters=%d > 1!\n", \ 458 __func__, __LINE__, \ 459 (x)->cv.cv_waiters); \ 460 cv_broadcast(&(x)->cv); \ 461 } \ 462 } else \ 463 panic("%s(%d): [PCM RELEASE] Releasing non-BUSY cv!", \ 464 __func__, __LINE__); \ 465 } while (0) 466 467 /* Quick version, for shorter path. */ 468 #define PCM_ACQUIRE_QUICK(x) do { \ 469 if (PCM_LOCKOWNED(x)) \ 470 panic("%s(%d): [PCM ACQUIRE QUICK] Mutex owned!", \ 471 __func__, __LINE__); \ 472 PCM_LOCK(x); \ 473 PCM_WAIT(x); \ 474 PCM_ACQUIRE(x); \ 475 PCM_UNLOCK(x); \ 476 } while (0) 477 478 #define PCM_RELEASE_QUICK(x) do { \ 479 if (PCM_LOCKOWNED(x)) \ 480 panic("%s(%d): [PCM RELEASE QUICK] Mutex owned!", \ 481 __func__, __LINE__); \ 482 PCM_LOCK(x); \ 483 PCM_RELEASE(x); \ 484 PCM_UNLOCK(x); \ 485 } while (0) 486 487 #define PCM_BUSYASSERT(x) do { \ 488 if (!((x) != NULL && ((x)->flags & SD_F_BUSY))) \ 489 panic("%s(%d): [PCM BUSYASSERT] " \ 490 "Failed, snddev_info=%p", __func__, __LINE__, x); \ 491 } while (0) 492 493 #define PCM_GIANT_ENTER(x) do { \ 494 int _pcm_giant = 0; \ 495 if (PCM_LOCKOWNED(x)) \ 496 panic("%s(%d): [GIANT ENTER] PCM lock owned!", \ 497 __func__, __LINE__); \ 498 if (mtx_owned(&Giant) != 0 && snd_verbose > 3) \ 499 device_printf((x)->dev, \ 500 "%s(%d): [GIANT ENTER] Giant owned!\n", \ 501 __func__, __LINE__); \ 502 if (!((x)->flags & SD_F_MPSAFE) && mtx_owned(&Giant) == 0) \ 503 do { \ 504 mtx_lock(&Giant); \ 505 _pcm_giant = 1; \ 506 } while (0) 507 508 #define PCM_GIANT_EXIT(x) do { \ 509 if (PCM_LOCKOWNED(x)) \ 510 panic("%s(%d): [GIANT EXIT] PCM lock owned!", \ 511 __func__, __LINE__); \ 512 if (!(_pcm_giant == 0 || _pcm_giant == 1)) \ 513 panic("%s(%d): [GIANT EXIT] _pcm_giant screwed!", \ 514 __func__, __LINE__); \ 515 if ((x)->flags & SD_F_MPSAFE) { \ 516 if (_pcm_giant == 1) \ 517 panic("%s(%d): [GIANT EXIT] MPSAFE Giant?", \ 518 __func__, __LINE__); \ 519 if (mtx_owned(&Giant) != 0 && snd_verbose > 3) \ 520 device_printf((x)->dev, \ 521 "%s(%d): [GIANT EXIT] Giant owned!\n", \ 522 __func__, __LINE__); \ 523 } \ 524 if (_pcm_giant != 0) { \ 525 if (mtx_owned(&Giant) == 0) \ 526 panic("%s(%d): [GIANT EXIT] Giant not owned!", \ 527 __func__, __LINE__); \ 528 _pcm_giant = 0; \ 529 mtx_unlock(&Giant); \ 530 } \ 531 } while (0) 532 #else /* SND_DIAGNOSTIC */ 533 #define PCM_WAIT(x) do { \ 534 PCM_LOCKASSERT(x); \ 535 while ((x)->flags & SD_F_BUSY) \ 536 cv_wait(&(x)->cv, (x)->lock); \ 537 } while (0) 538 539 #define PCM_ACQUIRE(x) do { \ 540 PCM_LOCKASSERT(x); \ 541 KASSERT(!((x)->flags & SD_F_BUSY), \ 542 ("%s(%d): [PCM ACQUIRE] Trying to acquire BUSY cv!", \ 543 __func__, __LINE__)); \ 544 (x)->flags |= SD_F_BUSY; \ 545 } while (0) 546 547 #define PCM_RELEASE(x) do { \ 548 PCM_LOCKASSERT(x); \ 549 KASSERT((x)->flags & SD_F_BUSY, \ 550 ("%s(%d): [PCM RELEASE] Releasing non-BUSY cv!", \ 551 __func__, __LINE__)); \ 552 (x)->flags &= ~SD_F_BUSY; \ 553 if ((x)->cv.cv_waiters != 0) \ 554 cv_broadcast(&(x)->cv); \ 555 } while (0) 556 557 /* Quick version, for shorter path. */ 558 #define PCM_ACQUIRE_QUICK(x) do { \ 559 PCM_UNLOCKASSERT(x); \ 560 PCM_LOCK(x); \ 561 PCM_WAIT(x); \ 562 PCM_ACQUIRE(x); \ 563 PCM_UNLOCK(x); \ 564 } while (0) 565 566 #define PCM_RELEASE_QUICK(x) do { \ 567 PCM_UNLOCKASSERT(x); \ 568 PCM_LOCK(x); \ 569 PCM_RELEASE(x); \ 570 PCM_UNLOCK(x); \ 571 } while (0) 572 573 #define PCM_BUSYASSERT(x) KASSERT(x != NULL && \ 574 ((x)->flags & SD_F_BUSY), \ 575 ("%s(%d): [PCM BUSYASSERT] " \ 576 "Failed, snddev_info=%p", \ 577 __func__, __LINE__, x)) 578 579 #define PCM_GIANT_ENTER(x) do { \ 580 int _pcm_giant = 0; \ 581 PCM_UNLOCKASSERT(x); \ 582 if (!((x)->flags & SD_F_MPSAFE) && mtx_owned(&Giant) == 0) \ 583 do { \ 584 mtx_lock(&Giant); \ 585 _pcm_giant = 1; \ 586 } while (0) 587 588 #define PCM_GIANT_EXIT(x) do { \ 589 PCM_UNLOCKASSERT(x); \ 590 KASSERT(_pcm_giant == 0 || _pcm_giant == 1, \ 591 ("%s(%d): [GIANT EXIT] _pcm_giant screwed!", \ 592 __func__, __LINE__)); \ 593 KASSERT(!((x)->flags & SD_F_MPSAFE) || \ 594 (((x)->flags & SD_F_MPSAFE) && _pcm_giant == 0), \ 595 ("%s(%d): [GIANT EXIT] MPSAFE Giant?", \ 596 __func__, __LINE__)); \ 597 if (_pcm_giant != 0) { \ 598 mtx_assert(&Giant, MA_OWNED); \ 599 _pcm_giant = 0; \ 600 mtx_unlock(&Giant); \ 601 } \ 602 } while (0) 603 #endif /* !SND_DIAGNOSTIC */ 604 605 #define PCM_GIANT_LEAVE(x) \ 606 PCM_GIANT_EXIT(x); \ 607 } while (0) 608 609 #ifdef KLD_MODULE 610 #define PCM_KLDSTRING(a) ("kld " # a) 611 #else 612 #define PCM_KLDSTRING(a) "" 613 #endif 614 615 #endif /* _KERNEL */ 616 617 #endif /* _OS_H_ */
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