1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2005-2009 Ariff Abdullah <ariff@FreeBSD.org> 5 * Portions Copyright (c) Ryan Beasley <ryan.beasley@gmail.com> - GSoC 2006 6 * Copyright (c) 1999 Cameron Grant <cg@FreeBSD.org> 7 * All rights reserved. 8 * Copyright (c) 2024-2025 The FreeBSD Foundation 9 * 10 * Portions of this software were developed by Christos Margiolis 11 * <christos@FreeBSD.org> under sponsorship from the FreeBSD Foundation. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 struct pcmchan_caps { 36 u_int32_t minspeed, maxspeed; 37 u_int32_t *fmtlist; 38 u_int32_t caps; 39 }; 40 41 struct pcmchan_matrix { 42 int id; 43 uint8_t channels, ext; 44 struct { 45 int type; 46 uint32_t members; 47 } map[SND_CHN_T_MAX + 1]; 48 uint32_t mask; 49 int8_t offset[SND_CHN_T_MAX]; 50 }; 51 52 /* Forward declarations */ 53 struct pcm_channel; 54 struct pcmchan_syncgroup; 55 struct pcmchan_syncmember; 56 57 extern struct mtx snd_pcm_syncgroups_mtx; 58 extern SLIST_HEAD(pcm_synclist, pcmchan_syncgroup) snd_pcm_syncgroups; 59 60 #define PCM_SG_LOCK() mtx_lock(&snd_pcm_syncgroups_mtx) 61 #define PCM_SG_TRYLOCK() mtx_trylock(&snd_pcm_syncgroups_mtx) 62 #define PCM_SG_UNLOCK() mtx_unlock(&snd_pcm_syncgroups_mtx) 63 #define PCM_SG_LOCKASSERT(arg) mtx_assert(&snd_pcm_syncgroups_mtx, arg) 64 65 /** 66 * @brief Specifies an audio device sync group 67 */ 68 struct pcmchan_syncgroup { 69 SLIST_ENTRY(pcmchan_syncgroup) link; 70 SLIST_HEAD(, pcmchan_syncmember) members; 71 int id; /**< Group identifier; set to address of group. */ 72 }; 73 74 /** 75 * @brief Specifies a container for members of a sync group 76 */ 77 struct pcmchan_syncmember { 78 SLIST_ENTRY(pcmchan_syncmember) link; 79 struct pcmchan_syncgroup *parent; /**< group head */ 80 struct pcm_channel *ch; 81 }; 82 83 #define CHN_NAMELEN 32 84 #define CHN_COMM_UNUSED "<UNUSED>" 85 #define CHN_COMM_UNKNOWN "<UNKNOWN>" 86 87 struct pcm_channel { 88 kobj_t methods; 89 90 pid_t pid; 91 struct pcm_feeder *feeder; 92 u_int32_t align; 93 94 int latency; 95 u_int32_t speed; 96 u_int32_t format; 97 u_int32_t flags; 98 u_int32_t feederflags; 99 u_int64_t blocks; 100 101 int direction; 102 unsigned int interrupts, xruns, feedcount; 103 unsigned int timeout; 104 struct snd_dbuf *bufhard, *bufsoft; 105 struct snddev_info *parentsnddev; 106 struct pcm_channel *parentchannel; 107 void *devinfo; 108 device_t dev; 109 int unit; 110 int type; 111 char name[CHN_NAMELEN]; 112 char comm[MAXCOMLEN + 1]; 113 struct mtx lock; 114 int trigger; 115 /** 116 * For interrupt manipulations. 117 */ 118 struct cv intr_cv; 119 /** 120 * Increment,decrement this around operations that temporarily yield 121 * lock. 122 */ 123 unsigned int inprog; 124 /* Incrememnt/decrement around cv_timedwait_sig() in chn_sleep(). */ 125 unsigned int sleeping; 126 /** 127 * Special channel operations should examine @c inprog after acquiring 128 * lock. If zero, operations may continue. Else, thread should 129 * wait on this cv for previous operation to finish. 130 */ 131 struct cv cv; 132 /** 133 * Low water mark for select()/poll(). 134 * 135 * This is initialized to the channel's fragment size, and will be 136 * overwritten if a new fragment size is set. Users may alter this 137 * value directly with the @c SNDCTL_DSP_LOW_WATER ioctl. 138 */ 139 unsigned int lw; 140 /** 141 * If part of a sync group, this will point to the syncmember 142 * container. 143 */ 144 struct pcmchan_syncmember *sm; 145 #ifdef OSSV4_EXPERIMENT 146 u_int16_t lpeak, rpeak; /**< Peak value from 0-32767. */ 147 #endif 148 149 struct { 150 SLIST_HEAD(, pcm_channel) head; 151 SLIST_ENTRY(pcm_channel) link; 152 struct { 153 SLIST_HEAD(, pcm_channel) head; 154 SLIST_ENTRY(pcm_channel) link; 155 } busy; 156 } children; 157 158 struct { 159 struct { 160 SLIST_ENTRY(pcm_channel) link; 161 struct { 162 SLIST_ENTRY(pcm_channel) link; 163 } busy; 164 struct { 165 SLIST_ENTRY(pcm_channel) link; 166 } opened; 167 struct { 168 SLIST_ENTRY(pcm_channel) link; 169 } primary; 170 } pcm; 171 } channels; 172 173 struct pcmchan_matrix matrix; 174 struct pcmchan_matrix matrix_scratch; 175 176 int16_t volume[SND_VOL_C_MAX][SND_CHN_T_VOL_MAX]; 177 int8_t muted[SND_VOL_C_MAX][SND_CHN_T_VOL_MAX]; 178 }; 179 180 #define CHN_HEAD(x, y) &(x)->y.head 181 #define CHN_INIT(x, y) SLIST_INIT(CHN_HEAD(x, y)) 182 #define CHN_LINK(y) y.link 183 #define CHN_EMPTY(x, y) SLIST_EMPTY(CHN_HEAD(x, y)) 184 #define CHN_FIRST(x, y) SLIST_FIRST(CHN_HEAD(x, y)) 185 #define CHN_NEXT(elm, list) SLIST_NEXT((elm), CHN_LINK(list)) 186 187 #define CHN_FOREACH(x, y, z) \ 188 SLIST_FOREACH(x, CHN_HEAD(y, z), CHN_LINK(z)) 189 190 #define CHN_FOREACH_SAFE(w, x, y, z) \ 191 SLIST_FOREACH_SAFE(w, CHN_HEAD(x, z), CHN_LINK(z), y) 192 193 #define CHN_INSERT_HEAD(x, y, z) \ 194 SLIST_INSERT_HEAD(CHN_HEAD(x, z), y, CHN_LINK(z)) 195 196 #define CHN_INSERT_AFTER(x, y, z) \ 197 SLIST_INSERT_AFTER(x, y, CHN_LINK(z)) 198 199 #define CHN_INSERT_HEAD_SAFE(x, y, z) do { \ 200 struct pcm_channel *t = NULL; \ 201 CHN_FOREACH(t, x, z) { \ 202 if (t == y) \ 203 break; \ 204 } \ 205 if (t != y) \ 206 CHN_INSERT_HEAD(x, y, z); \ 207 } while (0) 208 209 #define CHN_INSERT_AFTER_SAFE(w, x, y, z) do { \ 210 struct pcm_channel *t = NULL; \ 211 CHN_FOREACH(t, w, z) { \ 212 if (t == y) \ 213 break; \ 214 } \ 215 if (t != y) \ 216 CHN_INSERT_AFTER(x, y, z); \ 217 } while (0) 218 219 #define CHN_REMOVE(holder, elm, list) do { \ 220 if (CHN_FIRST(holder, list) == (elm)) { \ 221 SLIST_REMOVE_HEAD(CHN_HEAD(holder, list), CHN_LINK(list)); \ 222 } else { \ 223 struct pcm_channel *t = NULL; \ 224 CHN_FOREACH(t, holder, list) { \ 225 if (CHN_NEXT(t, list) == (elm)) { \ 226 SLIST_REMOVE_AFTER(t, CHN_LINK(list)); \ 227 break; \ 228 } \ 229 } \ 230 } \ 231 } while (0) 232 233 #define CHN_INSERT_SORT(w, x, y, z) do { \ 234 struct pcm_channel *t, *a = NULL; \ 235 CHN_FOREACH(t, x, z) { \ 236 if (((y)->type w t->type) || \ 237 (((y)->type == t->type) && ((y)->unit w t->unit))) \ 238 a = t; \ 239 else \ 240 break; \ 241 } \ 242 if (a != NULL) \ 243 CHN_INSERT_AFTER(a, y, z); \ 244 else \ 245 CHN_INSERT_HEAD(x, y, z); \ 246 } while (0) 247 248 #define CHN_INSERT_SORT_ASCEND(x, y, z) CHN_INSERT_SORT(>, x, y, z) 249 #define CHN_INSERT_SORT_DESCEND(x, y, z) CHN_INSERT_SORT(<, x, y, z) 250 251 #define CHN_BUF_PARENT(x, y) \ 252 (((x) != NULL && (x)->parentchannel != NULL && \ 253 (x)->parentchannel->bufhard != NULL) ? \ 254 (x)->parentchannel->bufhard : (y)) 255 256 #include "channel_if.h" 257 258 int chn_write(struct pcm_channel *c, struct uio *buf); 259 int chn_read(struct pcm_channel *c, struct uio *buf); 260 u_int32_t chn_start(struct pcm_channel *c, int force); 261 int chn_sync(struct pcm_channel *c, int threshold); 262 int chn_flush(struct pcm_channel *c); 263 int chn_polltrigger(struct pcm_channel *c); 264 int chn_poll(struct pcm_channel *c, int ev, struct thread *td); 265 266 char *chn_mkname(char *buf, size_t len, struct pcm_channel *c); 267 struct pcm_channel *chn_init(struct snddev_info *d, struct pcm_channel *parent, 268 kobj_class_t cls, int dir, void *devinfo); 269 void chn_kill(struct pcm_channel *c); 270 void chn_shutdown(struct pcm_channel *c); 271 int chn_release(struct pcm_channel *c); 272 int chn_reset(struct pcm_channel *c, u_int32_t fmt, u_int32_t spd); 273 int chn_setvolume_multi(struct pcm_channel *c, int vc, int left, int right, 274 int center); 275 int chn_setvolume_matrix(struct pcm_channel *c, int vc, int vt, int val); 276 int chn_getvolume_matrix(struct pcm_channel *c, int vc, int vt); 277 int chn_setmute_multi(struct pcm_channel *c, int vc, int mute); 278 int chn_setmute_matrix(struct pcm_channel *c, int vc, int vt, int mute); 279 int chn_getmute_matrix(struct pcm_channel *c, int vc, int vt); 280 void chn_vpc_reset(struct pcm_channel *c, int vc, int force); 281 int chn_setparam(struct pcm_channel *c, uint32_t format, uint32_t speed); 282 int chn_setspeed(struct pcm_channel *c, uint32_t speed); 283 int chn_setformat(struct pcm_channel *c, uint32_t format); 284 int chn_setblocksize(struct pcm_channel *c, int blkcnt, int blksz); 285 int chn_setlatency(struct pcm_channel *c, int latency); 286 void chn_syncstate(struct pcm_channel *c); 287 int chn_trigger(struct pcm_channel *c, int go); 288 int chn_getptr(struct pcm_channel *c); 289 struct pcmchan_caps *chn_getcaps(struct pcm_channel *c); 290 u_int32_t chn_getformats(struct pcm_channel *c); 291 292 struct pcmchan_matrix *chn_getmatrix(struct pcm_channel *); 293 int chn_setmatrix(struct pcm_channel *, struct pcmchan_matrix *); 294 295 int chn_oss_getorder(struct pcm_channel *, unsigned long long *); 296 int chn_oss_setorder(struct pcm_channel *, unsigned long long *); 297 int chn_oss_getmask(struct pcm_channel *, uint32_t *); 298 299 void chn_resetbuf(struct pcm_channel *c); 300 void chn_intr(struct pcm_channel *c); 301 int chn_abort(struct pcm_channel *c); 302 303 int chn_notify(struct pcm_channel *c, u_int32_t flags); 304 305 int chn_getrates(struct pcm_channel *c, int **rates); 306 int chn_syncdestroy(struct pcm_channel *c); 307 308 #ifdef OSSV4_EXPERIMENT 309 int chn_getpeaks(struct pcm_channel *c, int *lpeak, int *rpeak); 310 #endif 311 312 #define CHN_LOCKOWNED(c) mtx_owned(&(c)->lock) 313 #define CHN_LOCK(c) mtx_lock(&(c)->lock) 314 #define CHN_UNLOCK(c) mtx_unlock(&(c)->lock) 315 #define CHN_TRYLOCK(c) mtx_trylock(&(c)->lock) 316 #define CHN_LOCKASSERT(c) mtx_assert(&(c)->lock, MA_OWNED) 317 #define CHN_UNLOCKASSERT(c) mtx_assert(&(c)->lock, MA_NOTOWNED) 318 319 #define CHN_BROADCAST(x) cv_broadcastpri(x, PRIBIO) 320 321 int snd_fmtvalid(uint32_t fmt, uint32_t *fmtlist); 322 323 uint32_t snd_str2afmt(const char *); 324 uint32_t snd_afmt2str(uint32_t, char *, size_t); 325 326 #define AFMTSTR_LEN 16 327 328 extern int chn_latency; 329 extern int chn_latency_profile; 330 extern int report_soft_formats; 331 extern int report_soft_matrix; 332 333 enum { 334 PCMDIR_PLAY = 1, 335 PCMDIR_PLAY_VIRTUAL, 336 PCMDIR_REC, 337 PCMDIR_REC_VIRTUAL, 338 }; 339 340 #define PCMTRIG_START 1 341 #define PCMTRIG_EMLDMAWR 2 342 #define PCMTRIG_EMLDMARD 3 343 #define PCMTRIG_STOP 0 344 #define PCMTRIG_ABORT -1 345 346 #define PCMTRIG_COMMON(x) ((x) == PCMTRIG_START || \ 347 (x) == PCMTRIG_STOP || \ 348 (x) == PCMTRIG_ABORT) 349 350 #define CHN_F_CLOSING 0x00000001 /* a pending close */ 351 #define CHN_F_ABORTING 0x00000002 /* a pending abort */ 352 #define CHN_F_RUNNING 0x00000004 /* dma is running */ 353 #define CHN_F_TRIGGERED 0x00000008 354 #define CHN_F_NOTRIGGER 0x00000010 355 /* unused 0x00000020 */ 356 357 #define CHN_F_NBIO 0x00000040 /* do non-blocking i/o */ 358 #define CHN_F_MMAP 0x00000080 /* has been mmap()ed */ 359 360 #define CHN_F_BUSY 0x00000100 /* has been opened */ 361 #define CHN_F_DIRTY 0x00000200 /* need re-config */ 362 #define CHN_F_DEAD 0x00000400 /* too many errors, dead, mdk */ 363 /* unused 0x00000800 */ 364 365 #define CHN_F_HAS_SIZE 0x00001000 /* user set block size */ 366 #define CHN_F_HAS_VCHAN 0x00002000 /* vchan master */ 367 368 #define CHN_F_VCHAN_PASSTHROUGH 0x00004000 /* digital ac3/dts passthrough */ 369 #define CHN_F_VCHAN_ADAPTIVE 0x00008000 /* adaptive format/rate selection */ 370 #define CHN_F_VCHAN_DYNAMIC (CHN_F_VCHAN_PASSTHROUGH | CHN_F_VCHAN_ADAPTIVE) 371 372 #define CHN_F_VIRTUAL 0x10000000 /* not backed by hardware */ 373 #define CHN_F_BITPERFECT 0x20000000 /* un-cooked, Heh.. */ 374 #define CHN_F_PASSTHROUGH 0x40000000 /* passthrough re-config */ 375 #define CHN_F_EXCLUSIVE 0x80000000 /* exclusive access */ 376 377 #define CHN_F_BITS "\020" \ 378 "\001CLOSING" \ 379 "\002ABORTING" \ 380 "\003RUNNING" \ 381 "\004TRIGGERED" \ 382 "\005NOTRIGGER" \ 383 /* \006 */ \ 384 "\007NBIO" \ 385 "\010MMAP" \ 386 "\011BUSY" \ 387 "\012DIRTY" \ 388 "\013DEAD" \ 389 /* \014 */ \ 390 "\015HAS_SIZE" \ 391 "\016HAS_VCHAN" \ 392 "\017VCHAN_PASSTHROUGH" \ 393 "\020VCHAN_ADAPTIVE" \ 394 "\035VIRTUAL" \ 395 "\036BITPERFECT" \ 396 "\037PASSTHROUGH" \ 397 "\040EXCLUSIVE" 398 399 #define CHN_F_RESET (CHN_F_BUSY | CHN_F_DEAD | \ 400 CHN_F_VIRTUAL | CHN_F_HAS_VCHAN | \ 401 CHN_F_VCHAN_DYNAMIC | CHN_F_NBIO | \ 402 CHN_F_PASSTHROUGH | CHN_F_EXCLUSIVE) 403 404 #define CHN_F_MMAP_INVALID (CHN_F_DEAD | CHN_F_RUNNING) 405 406 407 408 #define CHN_N_RATE 0x00000001 409 #define CHN_N_FORMAT 0x00000002 410 #define CHN_N_VOLUME 0x00000004 411 #define CHN_N_BLOCKSIZE 0x00000008 412 #define CHN_N_TRIGGER 0x00000010 413 414 #define CHN_LATENCY_MIN 0 415 #define CHN_LATENCY_MAX 10 416 #define CHN_LATENCY_DEFAULT 2 /* 21.3ms total buffering */ 417 #define CHN_POLICY_MIN CHN_LATENCY_MIN 418 #define CHN_POLICY_MAX CHN_LATENCY_MAX 419 #define CHN_POLICY_DEFAULT CHN_LATENCY_DEFAULT 420 421 #define CHN_LATENCY_PROFILE_MIN 0 422 #define CHN_LATENCY_PROFILE_MAX 1 423 #define CHN_LATENCY_PROFILE_DEFAULT CHN_LATENCY_PROFILE_MAX 424 425 #define CHN_STARTED(c) ((c)->flags & CHN_F_TRIGGERED) 426 #define CHN_STOPPED(c) (!CHN_STARTED(c)) 427 #define CHN_DIRSTR(c) (((c)->direction == PCMDIR_PLAY) ? \ 428 "PCMDIR_PLAY" : "PCMDIR_REC") 429 #define CHN_BITPERFECT(c) ((c)->flags & CHN_F_BITPERFECT) 430 #define CHN_PASSTHROUGH(c) ((c)->flags & CHN_F_PASSTHROUGH) 431 432 #define CHN_TIMEOUT 5 433 #define CHN_TIMEOUT_MIN 1 434 #define CHN_TIMEOUT_MAX 10 435 436 /* 437 * This should be large enough to hold all pcm data between 438 * tsleeps in chn_{read,write} at the highest sample rate. 439 * (which is usually 48kHz * 16bit * stereo = 192000 bytes/sec) 440 */ 441 #define CHN_2NDBUFBLKSIZE (2 * 1024) 442 /* The total number of blocks per secondary bufhard. */ 443 #define CHN_2NDBUFBLKNUM (32) 444 /* The size of a whole secondary bufhard. */ 445 #define CHN_2NDBUFMAXSIZE (131072) 446 447 #define CHANNEL_DECLARE(name) static DEFINE_CLASS(name, name ## _methods, sizeof(struct kobj)) 448