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 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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 * $FreeBSD$ 31 */ 32 33 /* 34 * first, include kernel header files. 35 */ 36 37 #ifndef _OS_H_ 38 #define _OS_H_ 39 40 #ifdef _KERNEL 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/ioccom.h> 44 #include <sys/filio.h> 45 #include <sys/sockio.h> 46 #include <sys/fcntl.h> 47 #include <sys/selinfo.h> 48 #include <sys/proc.h> 49 #include <sys/kernel.h> /* for DATA_SET */ 50 #include <sys/module.h> 51 #include <sys/conf.h> 52 #include <sys/file.h> 53 #include <sys/uio.h> 54 #include <sys/syslog.h> 55 #include <sys/errno.h> 56 #include <sys/malloc.h> 57 #include <sys/bus.h> 58 #include <machine/resource.h> 59 #include <machine/bus.h> 60 #include <sys/rman.h> 61 #include <sys/limits.h> 62 #include <sys/mman.h> 63 #include <sys/poll.h> 64 #include <sys/sbuf.h> 65 #include <sys/soundcard.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 #include <dev/sound/clone.h> 92 #include <dev/sound/unit.h> 93 94 #define PCM_SOFTC_SIZE (sizeof(struct snddev_info)) 95 96 #define SND_STATUSLEN 64 97 98 #define SOUND_MODVER 5 99 100 #define SOUND_MINVER SOUND_MODVER 101 #define SOUND_PREFVER SOUND_MODVER 102 #define SOUND_MAXVER SOUND_MODVER 103 104 /* 105 * We're abusing the fact that MAXMINOR still have enough room 106 * for our bit twiddling and nobody ever need 512 unique soundcards, 107 * 32 unique device types and 1024 unique cloneable devices for the 108 * next 100 years... 109 */ 110 111 #define PCMMAXUNIT (snd_max_u()) 112 #define PCMMAXDEV (snd_max_d()) 113 #define PCMMAXCHAN (snd_max_c()) 114 115 #define PCMMAXCLONE PCMMAXCHAN 116 117 #define PCMUNIT(x) (snd_unit2u(dev2unit(x))) 118 #define PCMDEV(x) (snd_unit2d(dev2unit(x))) 119 #define PCMCHAN(x) (snd_unit2c(dev2unit(x))) 120 121 /* XXX unit2minor compat */ 122 #define PCMMINOR(x) (x) 123 124 /* 125 * By design, limit possible channels for each direction. 126 */ 127 #define SND_MAXHWCHAN 256 128 #define SND_MAXVCHANS SND_MAXHWCHAN 129 130 #define SD_F_SIMPLEX 0x00000001 131 #define SD_F_AUTOVCHAN 0x00000002 132 #define SD_F_SOFTPCMVOL 0x00000004 133 #define SD_F_DYING 0x00000008 134 #define SD_F_DETACHING 0x00000010 135 #define SD_F_BUSY 0x00000020 136 #define SD_F_MPSAFE 0x00000040 137 #define SD_F_REGISTERED 0x00000080 138 #define SD_F_BITPERFECT 0x00000100 139 #define SD_F_VPC 0x00000200 /* volume-per-channel */ 140 #define SD_F_EQ 0x00000400 /* EQ */ 141 #define SD_F_EQ_ENABLED 0x00000800 /* EQ enabled */ 142 #define SD_F_EQ_BYPASSED 0x00001000 /* EQ bypassed */ 143 #define SD_F_EQ_PC 0x00002000 /* EQ per-channel */ 144 145 #define SD_F_EQ_DEFAULT (SD_F_EQ | SD_F_EQ_ENABLED) 146 #define SD_F_EQ_MASK (SD_F_EQ | SD_F_EQ_ENABLED | \ 147 SD_F_EQ_BYPASSED | SD_F_EQ_PC) 148 149 #define SD_F_PRIO_RD 0x10000000 150 #define SD_F_PRIO_WR 0x20000000 151 #define SD_F_PRIO_SET (SD_F_PRIO_RD | SD_F_PRIO_WR) 152 #define SD_F_DIR_SET 0x40000000 153 #define SD_F_TRANSIENT 0xf0000000 154 155 #define SD_F_BITS "\020" \ 156 "\001SIMPLEX" \ 157 "\002AUTOVCHAN" \ 158 "\003SOFTPCMVOL" \ 159 "\004DYING" \ 160 "\005DETACHING" \ 161 "\006BUSY" \ 162 "\007MPSAFE" \ 163 "\010REGISTERED" \ 164 "\011BITPERFECT" \ 165 "\012VPC" \ 166 "\013EQ" \ 167 "\014EQ_ENABLED" \ 168 "\015EQ_BYPASSED" \ 169 "\016EQ_PC" \ 170 "\035PRIO_RD" \ 171 "\036PRIO_WR" \ 172 "\037DIR_SET" 173 174 #define PCM_ALIVE(x) ((x) != NULL && (x)->lock != NULL && \ 175 !((x)->flags & SD_F_DYING)) 176 #define PCM_REGISTERED(x) (PCM_ALIVE(x) && \ 177 ((x)->flags & SD_F_REGISTERED)) 178 179 #define PCM_DETACHING(x) ((x)->flags & SD_F_DETACHING) 180 181 /* many variables should be reduced to a range. Here define a macro */ 182 #define RANGE(var, low, high) (var) = \ 183 (((var)<(low))? (low) : ((var)>(high))? (high) : (var)) 184 #define DSP_BUFFSIZE (8192) 185 186 /* make figuring out what a format is easier. got AFMT_STEREO already */ 187 #define AFMT_32BIT (AFMT_S32_LE | AFMT_S32_BE | AFMT_U32_LE | AFMT_U32_BE) 188 #define AFMT_24BIT (AFMT_S24_LE | AFMT_S24_BE | AFMT_U24_LE | AFMT_U24_BE) 189 #define AFMT_16BIT (AFMT_S16_LE | AFMT_S16_BE | AFMT_U16_LE | AFMT_U16_BE) 190 #define AFMT_G711 (AFMT_MU_LAW | AFMT_A_LAW) 191 #define AFMT_8BIT (AFMT_G711 | AFMT_U8 | AFMT_S8) 192 #define AFMT_SIGNED (AFMT_S32_LE | AFMT_S32_BE | AFMT_S24_LE | AFMT_S24_BE | \ 193 AFMT_S16_LE | AFMT_S16_BE | AFMT_S8) 194 #define AFMT_BIGENDIAN (AFMT_S32_BE | AFMT_U32_BE | AFMT_S24_BE | AFMT_U24_BE | \ 195 AFMT_S16_BE | AFMT_U16_BE) 196 197 #define AFMT_CONVERTIBLE (AFMT_8BIT | AFMT_16BIT | AFMT_24BIT | \ 198 AFMT_32BIT) 199 200 /* Supported vchan mixing formats */ 201 #define AFMT_VCHAN (AFMT_CONVERTIBLE & ~AFMT_G711) 202 203 #define AFMT_PASSTHROUGH AFMT_AC3 204 #define AFMT_PASSTHROUGH_RATE 48000 205 #define AFMT_PASSTHROUGH_CHANNEL 2 206 #define AFMT_PASSTHROUGH_EXTCHANNEL 0 207 208 /* 209 * We're simply using unused, contiguous bits from various AFMT_ definitions. 210 * ~(0xb00ff7ff) 211 */ 212 #define AFMT_ENCODING_MASK 0xf00fffff 213 #define AFMT_CHANNEL_MASK 0x07f00000 214 #define AFMT_CHANNEL_SHIFT 20 215 #define AFMT_CHANNEL_MAX 0x7f 216 #define AFMT_EXTCHANNEL_MASK 0x08000000 217 #define AFMT_EXTCHANNEL_SHIFT 27 218 #define AFMT_EXTCHANNEL_MAX 1 219 220 #define AFMT_ENCODING(v) ((v) & AFMT_ENCODING_MASK) 221 222 #define AFMT_EXTCHANNEL(v) (((v) & AFMT_EXTCHANNEL_MASK) >> \ 223 AFMT_EXTCHANNEL_SHIFT) 224 225 #define AFMT_CHANNEL(v) (((v) & AFMT_CHANNEL_MASK) >> \ 226 AFMT_CHANNEL_SHIFT) 227 228 #define AFMT_BIT(v) (((v) & AFMT_32BIT) ? 32 : \ 229 (((v) & AFMT_24BIT) ? 24 : \ 230 ((((v) & AFMT_16BIT) || \ 231 ((v) & AFMT_PASSTHROUGH)) ? 16 : 8))) 232 233 #define AFMT_BPS(v) (AFMT_BIT(v) >> 3) 234 #define AFMT_ALIGN(v) (AFMT_BPS(v) * AFMT_CHANNEL(v)) 235 236 #define SND_FORMAT(f, c, e) (AFMT_ENCODING(f) | \ 237 (((c) << AFMT_CHANNEL_SHIFT) & \ 238 AFMT_CHANNEL_MASK) | \ 239 (((e) << AFMT_EXTCHANNEL_SHIFT) & \ 240 AFMT_EXTCHANNEL_MASK)) 241 242 #define AFMT_U8_NE AFMT_U8 243 #define AFMT_S8_NE AFMT_S8 244 245 #define AFMT_SIGNED_NE (AFMT_S8_NE | AFMT_S16_NE | AFMT_S24_NE | AFMT_S32_NE) 246 247 #define AFMT_NE (AFMT_SIGNED_NE | AFMT_U8_NE | AFMT_U16_NE | \ 248 AFMT_U24_NE | AFMT_U32_NE) 249 250 /* 251 * Minor numbers for the sound driver. 252 * 253 * Unfortunately Creative called the codec chip of SB as a DSP. For this 254 * reason the /dev/dsp is reserved for digitized audio use. There is a 255 * device for true DSP processors but it will be called something else. 256 * In v3.0 it's /dev/sndproc but this could be a temporary solution. 257 */ 258 259 #define SND_DEV_CTL 0 /* Control port /dev/mixer */ 260 #define SND_DEV_SEQ 1 /* Sequencer /dev/sequencer */ 261 #define SND_DEV_MIDIN 2 /* Raw midi access */ 262 #define SND_DEV_DSP 3 /* Digitized voice /dev/dsp */ 263 #define SND_DEV_AUDIO 4 /* Sparc compatible /dev/audio */ 264 #define SND_DEV_DSP16 5 /* Like /dev/dsp but 16 bits/sample */ 265 #define SND_DEV_STATUS 6 /* /dev/sndstat */ 266 /* #7 not in use now. */ 267 #define SND_DEV_SEQ2 8 /* /dev/sequencer, level 2 interface */ 268 #define SND_DEV_SNDPROC 9 /* /dev/sndproc for programmable devices */ 269 #define SND_DEV_PSS SND_DEV_SNDPROC /* ? */ 270 #define SND_DEV_NORESET 10 271 272 #define SND_DEV_DSPHW_PLAY 11 /* specific playback channel */ 273 #define SND_DEV_DSPHW_VPLAY 12 /* specific virtual playback channel */ 274 #define SND_DEV_DSPHW_REC 13 /* specific record channel */ 275 #define SND_DEV_DSPHW_VREC 14 /* specific virtual record channel */ 276 277 #define SND_DEV_DSPHW_CD 15 /* s16le/stereo 44100Hz CD */ 278 279 /* 280 * OSSv4 compatible device. For now, it serve no purpose and 281 * the cloning itself will forward the request to ordinary /dev/dsp 282 * instead. 283 */ 284 #define SND_DEV_DSP_MMAP 16 /* /dev/dsp_mmap */ 285 #define SND_DEV_DSP_AC3 17 /* /dev/dsp_ac3 */ 286 #define SND_DEV_DSP_MULTICH 18 /* /dev/dsp_multich */ 287 #define SND_DEV_DSP_SPDIFOUT 19 /* /dev/dsp_spdifout */ 288 #define SND_DEV_DSP_SPDIFIN 20 /* /dev/dsp_spdifin */ 289 290 #define SND_DEV_LAST SND_DEV_DSP_SPDIFIN 291 #define SND_DEV_MAX PCMMAXDEV 292 293 #define DSP_DEFAULT_SPEED 8000 294 295 #define ON 1 296 #define OFF 0 297 298 extern int pcm_veto_load; 299 extern int snd_unit; 300 extern int snd_maxautovchans; 301 extern int snd_verbose; 302 extern devclass_t pcm_devclass; 303 extern struct unrhdr *pcmsg_unrhdr; 304 305 /* 306 * some macros for debugging purposes 307 * DDB/DEB to enable/disable debugging stuff 308 * BVDDB to enable debugging when bootverbose 309 */ 310 #define BVDDB(x) if (bootverbose) x 311 312 #ifndef DEB 313 #define DEB(x) 314 #endif 315 316 SYSCTL_DECL(_hw_snd); 317 318 int pcm_setvchans(struct snddev_info *d, int direction, int newcnt, int num); 319 int pcm_chnalloc(struct snddev_info *d, struct pcm_channel **ch, int direction, 320 pid_t pid, char *comm, int devunit); 321 int pcm_chnrelease(struct pcm_channel *c); 322 int pcm_chnref(struct pcm_channel *c, int ref); 323 int pcm_inprog(struct snddev_info *d, int delta); 324 325 struct pcm_channel *pcm_chn_create(struct snddev_info *d, struct pcm_channel *parent, kobj_class_t cls, int dir, int num, void *devinfo); 326 int pcm_chn_destroy(struct pcm_channel *ch); 327 int pcm_chn_add(struct snddev_info *d, struct pcm_channel *ch); 328 int pcm_chn_remove(struct snddev_info *d, struct pcm_channel *ch); 329 330 int pcm_addchan(device_t dev, int dir, kobj_class_t cls, void *devinfo); 331 unsigned int pcm_getbuffersize(device_t dev, unsigned int minbufsz, unsigned int deflt, unsigned int maxbufsz); 332 int pcm_register(device_t dev, void *devinfo, int numplay, int numrec); 333 int pcm_unregister(device_t dev); 334 int pcm_setstatus(device_t dev, char *str); 335 u_int32_t pcm_getflags(device_t dev); 336 void pcm_setflags(device_t dev, u_int32_t val); 337 void *pcm_getdevinfo(device_t dev); 338 339 340 int snd_setup_intr(device_t dev, struct resource *res, int flags, 341 driver_intr_t hand, void *param, void **cookiep); 342 343 void *snd_mtxcreate(const char *desc, const char *type); 344 void snd_mtxfree(void *m); 345 void snd_mtxassert(void *m); 346 #define snd_mtxlock(m) mtx_lock(m) 347 #define snd_mtxunlock(m) mtx_unlock(m) 348 349 typedef int (*sndstat_handler)(struct sbuf *s, device_t dev, int verbose); 350 int sndstat_register(device_t dev, char *str, sndstat_handler handler); 351 int sndstat_registerfile(char *str); 352 int sndstat_unregister(device_t dev); 353 int sndstat_unregisterfile(char *str); 354 355 #define SND_DECLARE_FILE(version) \ 356 _SND_DECLARE_FILE(__LINE__, version) 357 358 #define _SND_DECLARE_FILE(uniq, version) \ 359 __SND_DECLARE_FILE(uniq, version) 360 361 #define __SND_DECLARE_FILE(uniq, version) \ 362 static char sndstat_vinfo[] = version; \ 363 SYSINIT(sdf_ ## uniq, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, sndstat_registerfile, sndstat_vinfo); \ 364 SYSUNINIT(sdf_ ## uniq, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, sndstat_unregisterfile, sndstat_vinfo); 365 366 /* usage of flags in device config entry (config file) */ 367 #define DV_F_DRQ_MASK 0x00000007 /* mask for secondary drq */ 368 #define DV_F_DUAL_DMA 0x00000010 /* set to use secondary dma channel */ 369 370 /* ought to be made obsolete but still used by mss */ 371 #define DV_F_DEV_MASK 0x0000ff00 /* force device type/class */ 372 #define DV_F_DEV_SHIFT 8 /* force device type/class */ 373 374 /* 375 * this is rather kludgey- we need to duplicate these struct def'ns from sound.c 376 * so that the macro versions of pcm_{,un}lock can dereference them. 377 * we also have to do this now makedev() has gone away. 378 */ 379 380 struct snddev_info { 381 struct { 382 struct { 383 SLIST_HEAD(, pcm_channel) head; 384 struct { 385 SLIST_HEAD(, pcm_channel) head; 386 } busy; 387 struct { 388 SLIST_HEAD(, pcm_channel) head; 389 } opened; 390 } pcm; 391 } channels; 392 TAILQ_HEAD(dsp_cdevinfo_linkhead, dsp_cdevinfo) dsp_cdevinfo_pool; 393 struct snd_clone *clones; 394 unsigned devcount, playcount, reccount, pvchancount, rvchancount ; 395 unsigned flags; 396 int inprog; 397 unsigned int bufsz; 398 void *devinfo; 399 device_t dev; 400 char status[SND_STATUSLEN]; 401 struct mtx *lock; 402 struct cdev *mixer_dev; 403 uint32_t pvchanrate, pvchanformat; 404 uint32_t rvchanrate, rvchanformat; 405 int32_t eqpreamp; 406 struct sysctl_ctx_list play_sysctl_ctx, rec_sysctl_ctx; 407 struct sysctl_oid *play_sysctl_tree, *rec_sysctl_tree; 408 struct cv cv; 409 }; 410 411 void sound_oss_sysinfo(oss_sysinfo *); 412 int sound_oss_card_info(oss_card_info *); 413 414 #define PCM_LOCKOWNED(d) mtx_owned((d)->lock) 415 #define PCM_LOCK(d) mtx_lock((d)->lock) 416 #define PCM_UNLOCK(d) mtx_unlock((d)->lock) 417 #define PCM_TRYLOCK(d) mtx_trylock((d)->lock) 418 #define PCM_LOCKASSERT(d) mtx_assert((d)->lock, MA_OWNED) 419 #define PCM_UNLOCKASSERT(d) mtx_assert((d)->lock, MA_NOTOWNED) 420 421 /* 422 * For PCM_[WAIT | ACQUIRE | RELEASE], be sure to surround these 423 * with PCM_LOCK/UNLOCK() sequence, or I'll come to gnaw upon you! 424 */ 425 #ifdef SND_DIAGNOSTIC 426 #define PCM_WAIT(x) do { \ 427 if (!PCM_LOCKOWNED(x)) \ 428 panic("%s(%d): [PCM WAIT] Mutex not owned!", \ 429 __func__, __LINE__); \ 430 while ((x)->flags & SD_F_BUSY) { \ 431 if (snd_verbose > 3) \ 432 device_printf((x)->dev, \ 433 "%s(%d): [PCM WAIT] calling cv_wait().\n", \ 434 __func__, __LINE__); \ 435 cv_wait(&(x)->cv, (x)->lock); \ 436 } \ 437 } while (0) 438 439 #define PCM_ACQUIRE(x) do { \ 440 if (!PCM_LOCKOWNED(x)) \ 441 panic("%s(%d): [PCM ACQUIRE] Mutex not owned!", \ 442 __func__, __LINE__); \ 443 if ((x)->flags & SD_F_BUSY) \ 444 panic("%s(%d): [PCM ACQUIRE] " \ 445 "Trying to acquire BUSY cv!", __func__, __LINE__); \ 446 (x)->flags |= SD_F_BUSY; \ 447 } while (0) 448 449 #define PCM_RELEASE(x) do { \ 450 if (!PCM_LOCKOWNED(x)) \ 451 panic("%s(%d): [PCM RELEASE] Mutex not owned!", \ 452 __func__, __LINE__); \ 453 if ((x)->flags & SD_F_BUSY) { \ 454 (x)->flags &= ~SD_F_BUSY; \ 455 if ((x)->cv.cv_waiters != 0) { \ 456 if ((x)->cv.cv_waiters > 1 && snd_verbose > 3) \ 457 device_printf((x)->dev, \ 458 "%s(%d): [PCM RELEASE] " \ 459 "cv_waiters=%d > 1!\n", \ 460 __func__, __LINE__, \ 461 (x)->cv.cv_waiters); \ 462 cv_broadcast(&(x)->cv); \ 463 } \ 464 } else \ 465 panic("%s(%d): [PCM RELEASE] Releasing non-BUSY cv!", \ 466 __func__, __LINE__); \ 467 } while (0) 468 469 /* Quick version, for shorter path. */ 470 #define PCM_ACQUIRE_QUICK(x) do { \ 471 if (PCM_LOCKOWNED(x)) \ 472 panic("%s(%d): [PCM ACQUIRE QUICK] Mutex owned!", \ 473 __func__, __LINE__); \ 474 PCM_LOCK(x); \ 475 PCM_WAIT(x); \ 476 PCM_ACQUIRE(x); \ 477 PCM_UNLOCK(x); \ 478 } while (0) 479 480 #define PCM_RELEASE_QUICK(x) do { \ 481 if (PCM_LOCKOWNED(x)) \ 482 panic("%s(%d): [PCM RELEASE QUICK] Mutex owned!", \ 483 __func__, __LINE__); \ 484 PCM_LOCK(x); \ 485 PCM_RELEASE(x); \ 486 PCM_UNLOCK(x); \ 487 } while (0) 488 489 #define PCM_BUSYASSERT(x) do { \ 490 if (!((x) != NULL && ((x)->flags & SD_F_BUSY))) \ 491 panic("%s(%d): [PCM BUSYASSERT] " \ 492 "Failed, snddev_info=%p", __func__, __LINE__, x); \ 493 } while (0) 494 495 #define PCM_GIANT_ENTER(x) do { \ 496 int _pcm_giant = 0; \ 497 if (PCM_LOCKOWNED(x)) \ 498 panic("%s(%d): [GIANT ENTER] PCM lock owned!", \ 499 __func__, __LINE__); \ 500 if (mtx_owned(&Giant) != 0 && snd_verbose > 3) \ 501 device_printf((x)->dev, \ 502 "%s(%d): [GIANT ENTER] Giant owned!\n", \ 503 __func__, __LINE__); \ 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 if (PCM_LOCKOWNED(x)) \ 512 panic("%s(%d): [GIANT EXIT] PCM lock owned!", \ 513 __func__, __LINE__); \ 514 if (!(_pcm_giant == 0 || _pcm_giant == 1)) \ 515 panic("%s(%d): [GIANT EXIT] _pcm_giant screwed!", \ 516 __func__, __LINE__); \ 517 if ((x)->flags & SD_F_MPSAFE) { \ 518 if (_pcm_giant == 1) \ 519 panic("%s(%d): [GIANT EXIT] MPSAFE Giant?", \ 520 __func__, __LINE__); \ 521 if (mtx_owned(&Giant) != 0 && snd_verbose > 3) \ 522 device_printf((x)->dev, \ 523 "%s(%d): [GIANT EXIT] Giant owned!\n", \ 524 __func__, __LINE__); \ 525 } \ 526 if (_pcm_giant != 0) { \ 527 if (mtx_owned(&Giant) == 0) \ 528 panic("%s(%d): [GIANT EXIT] Giant not owned!", \ 529 __func__, __LINE__); \ 530 _pcm_giant = 0; \ 531 mtx_unlock(&Giant); \ 532 } \ 533 } while (0) 534 #else /* SND_DIAGNOSTIC */ 535 #define PCM_WAIT(x) do { \ 536 PCM_LOCKASSERT(x); \ 537 while ((x)->flags & SD_F_BUSY) \ 538 cv_wait(&(x)->cv, (x)->lock); \ 539 } while (0) 540 541 #define PCM_ACQUIRE(x) do { \ 542 PCM_LOCKASSERT(x); \ 543 KASSERT(!((x)->flags & SD_F_BUSY), \ 544 ("%s(%d): [PCM ACQUIRE] Trying to acquire BUSY cv!", \ 545 __func__, __LINE__)); \ 546 (x)->flags |= SD_F_BUSY; \ 547 } while (0) 548 549 #define PCM_RELEASE(x) do { \ 550 PCM_LOCKASSERT(x); \ 551 KASSERT((x)->flags & SD_F_BUSY, \ 552 ("%s(%d): [PCM RELEASE] Releasing non-BUSY cv!", \ 553 __func__, __LINE__)); \ 554 (x)->flags &= ~SD_F_BUSY; \ 555 if ((x)->cv.cv_waiters != 0) \ 556 cv_broadcast(&(x)->cv); \ 557 } while (0) 558 559 /* Quick version, for shorter path. */ 560 #define PCM_ACQUIRE_QUICK(x) do { \ 561 PCM_UNLOCKASSERT(x); \ 562 PCM_LOCK(x); \ 563 PCM_WAIT(x); \ 564 PCM_ACQUIRE(x); \ 565 PCM_UNLOCK(x); \ 566 } while (0) 567 568 #define PCM_RELEASE_QUICK(x) do { \ 569 PCM_UNLOCKASSERT(x); \ 570 PCM_LOCK(x); \ 571 PCM_RELEASE(x); \ 572 PCM_UNLOCK(x); \ 573 } while (0) 574 575 #define PCM_BUSYASSERT(x) KASSERT(x != NULL && \ 576 ((x)->flags & SD_F_BUSY), \ 577 ("%s(%d): [PCM BUSYASSERT] " \ 578 "Failed, snddev_info=%p", \ 579 __func__, __LINE__, x)) 580 581 #define PCM_GIANT_ENTER(x) do { \ 582 int _pcm_giant = 0; \ 583 PCM_UNLOCKASSERT(x); \ 584 if (!((x)->flags & SD_F_MPSAFE) && mtx_owned(&Giant) == 0) \ 585 do { \ 586 mtx_lock(&Giant); \ 587 _pcm_giant = 1; \ 588 } while (0) 589 590 #define PCM_GIANT_EXIT(x) do { \ 591 PCM_UNLOCKASSERT(x); \ 592 KASSERT(_pcm_giant == 0 || _pcm_giant == 1, \ 593 ("%s(%d): [GIANT EXIT] _pcm_giant screwed!", \ 594 __func__, __LINE__)); \ 595 KASSERT(!((x)->flags & SD_F_MPSAFE) || \ 596 (((x)->flags & SD_F_MPSAFE) && _pcm_giant == 0), \ 597 ("%s(%d): [GIANT EXIT] MPSAFE Giant?", \ 598 __func__, __LINE__)); \ 599 if (_pcm_giant != 0) { \ 600 mtx_assert(&Giant, MA_OWNED); \ 601 _pcm_giant = 0; \ 602 mtx_unlock(&Giant); \ 603 } \ 604 } while (0) 605 #endif /* !SND_DIAGNOSTIC */ 606 607 #define PCM_GIANT_LEAVE(x) \ 608 PCM_GIANT_EXIT(x); \ 609 } while (0) 610 611 #ifdef KLD_MODULE 612 #define PCM_KLDSTRING(a) ("kld " # a) 613 #else 614 #define PCM_KLDSTRING(a) "" 615 #endif 616 617 #endif /* _KERNEL */ 618 619 #endif /* _OS_H_ */
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