sys/dev/sound/pcm/channel.h

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   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  *
   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 struct pcmchan_caps {
  34         u_int32_t minspeed, maxspeed;
  35         u_int32_t *fmtlist;
  36         u_int32_t caps;
  37 };
  38
  39 struct pcmchan_matrix {
  40         int id;
  41         uint8_t channels, ext;
  42         struct {
  43                 int type;
  44                 uint32_t members;
  45         } map[SND_CHN_T_MAX + 1];
  46         uint32_t mask;
  47         int8_t offset[SND_CHN_T_MAX];
  48 };
  49
  50 /* Forward declarations */
  51 struct pcm_channel;
  52 struct pcmchan_syncgroup;
  53 struct pcmchan_syncmember;
  54
  55 extern struct mtx snd_pcm_syncgroups_mtx;
  56 extern SLIST_HEAD(pcm_synclist, pcmchan_syncgroup) snd_pcm_syncgroups;
  57
  58 #define PCM_SG_LOCK()       mtx_lock(&snd_pcm_syncgroups_mtx)
  59 #define PCM_SG_TRYLOCK()    mtx_trylock(&snd_pcm_syncgroups_mtx)
  60 #define PCM_SG_UNLOCK()     mtx_unlock(&snd_pcm_syncgroups_mtx)
  61 #define PCM_SG_LOCKASSERT(arg)  mtx_assert(&snd_pcm_syncgroups_mtx, arg)
  62
  63 /**
  64  * @brief Specifies an audio device sync group
  65  */
  66 struct pcmchan_syncgroup {
  67         SLIST_ENTRY(pcmchan_syncgroup) link;
  68         SLIST_HEAD(, pcmchan_syncmember) members;
  69         int id; /**< Group identifier; set to address of group. */
  70 };
  71
  72 /**
  73  * @brief Specifies a container for members of a sync group
  74  */
  75 struct pcmchan_syncmember {
  76         SLIST_ENTRY(pcmchan_syncmember) link;
  77         struct pcmchan_syncgroup *parent; /**< group head */
  78         struct pcm_channel *ch;
  79 };
  80
  81 #define CHN_NAMELEN             32
  82 #define CHN_COMM_UNUSED         "<UNUSED>"
  83 #define CHN_COMM_UNKNOWN        "<UNKNOWN>"
  84
  85 struct pcm_channel {
  86         kobj_t methods;
  87
  88         pid_t pid;
  89         int refcount;
  90         struct pcm_feeder *feeder;
  91         u_int32_t align;
  92
  93         int latency;
  94         u_int32_t speed;
  95         u_int32_t format;
  96         u_int32_t flags;
  97         u_int32_t feederflags;
  98         u_int64_t blocks;
  99
 100         int direction;
 101         unsigned int interrupts, xruns, feedcount;
 102         unsigned int timeout;
 103         struct snd_dbuf *bufhard, *bufsoft;
 104         struct snddev_info *parentsnddev;
 105         struct pcm_channel *parentchannel;
 106         void *devinfo;
 107         device_t dev;
 108         int unit;
 109         char name[CHN_NAMELEN];
 110         char comm[MAXCOMLEN + 1];
 111         struct mtx *lock;
 112         int trigger;
 113         /**
 114          * For interrupt manipulations.
 115          */
 116         struct cv intr_cv;
 117         /**
 118          * Increment,decrement this around operations that temporarily yield
 119          * lock.
 120          */
 121         unsigned int inprog;
 122         /**
 123          * Special channel operations should examine @c inprog after acquiring
 124          * lock.  If zero, operations may continue.  Else, thread should
 125          * wait on this cv for previous operation to finish.
 126          */
 127         struct cv cv;
 128         /**
 129          * Low water mark for select()/poll().
 130          *
 131          * This is initialized to the channel's fragment size, and will be
 132          * overwritten if a new fragment size is set.  Users may alter this
 133          * value directly with the @c SNDCTL_DSP_LOW_WATER ioctl.
 134          */
 135         unsigned int lw;
 136         /**
 137          * If part of a sync group, this will point to the syncmember
 138          * container.
 139          */
 140         struct pcmchan_syncmember *sm;
 141 #ifdef OSSV4_EXPERIMENT
 142         u_int16_t lpeak, rpeak; /**< Peak value from 0-32767. */
 143 #endif
 144
 145         struct {
 146                 SLIST_HEAD(, pcm_channel) head;
 147                 SLIST_ENTRY(pcm_channel) link;
 148                 struct {
 149                         SLIST_HEAD(, pcm_channel) head;
 150                         SLIST_ENTRY(pcm_channel) link;
 151                 } busy;
 152         } children;
 153
 154         struct {
 155                 struct {
 156                         SLIST_ENTRY(pcm_channel) link;
 157                         struct {
 158                                 SLIST_ENTRY(pcm_channel) link;
 159                         } busy;
 160                         struct {
 161                                 SLIST_ENTRY(pcm_channel) link;
 162                         } opened;
 163                 } pcm;
 164         } channels;
 165
 166         struct pcmchan_matrix matrix;
 167         struct pcmchan_matrix matrix_scratch;
 168
 169         int volume[SND_VOL_C_MAX][SND_CHN_T_VOL_MAX];
 170
 171         void *data1, *data2;
 172 };
 173
 174 #define CHN_HEAD(x, y)                  &(x)->y.head
 175 #define CHN_INIT(x, y)                  SLIST_INIT(CHN_HEAD(x, y))
 176 #define CHN_LINK(y)                     y.link
 177 #define CHN_EMPTY(x, y)                 SLIST_EMPTY(CHN_HEAD(x, y))
 178 #define CHN_FIRST(x, y)                 SLIST_FIRST(CHN_HEAD(x, y))
 179
 180 #define CHN_FOREACH(x, y, z)                                            \
 181         SLIST_FOREACH(x, CHN_HEAD(y, z), CHN_LINK(z))
 182
 183 #define CHN_FOREACH_SAFE(w, x, y, z)                                    \
 184         SLIST_FOREACH_SAFE(w, CHN_HEAD(x, z), CHN_LINK(z), y)
 185
 186 #define CHN_INSERT_HEAD(x, y, z)                                        \
 187         SLIST_INSERT_HEAD(CHN_HEAD(x, z), y, CHN_LINK(z))
 188
 189 #define CHN_INSERT_AFTER(x, y, z)                                       \
 190         SLIST_INSERT_AFTER(x, y, CHN_LINK(z))
 191
 192 #define CHN_REMOVE(x, y, z)                                             \
 193         SLIST_REMOVE(CHN_HEAD(x, z), y, pcm_channel, CHN_LINK(z))
 194
 195 #define CHN_INSERT_HEAD_SAFE(x, y, z)           do {                    \
 196         struct pcm_channel *t = NULL;                                   \
 197         CHN_FOREACH(t, x, z) {                                          \
 198                 if (t == y)                                             \
 199                         break;                                          \
 200         }                                                               \
 201         if (t != y)                                                     \
 202                 CHN_INSERT_HEAD(x, y, z);                               \
 203 } while (0)
 204
 205 #define CHN_INSERT_AFTER_SAFE(w, x, y, z)       do {                    \
 206         struct pcm_channel *t = NULL;                                   \
 207         CHN_FOREACH(t, w, z) {                                          \
 208                 if (t == y)                                             \
 209                         break;                                          \
 210         }                                                               \
 211         if (t != y)                                                     \
 212                 CHN_INSERT_AFTER(x, y, z);                              \
 213 } while (0)
 214
 215 #define CHN_REMOVE_SAFE(x, y, z)                do {                    \
 216         struct pcm_channel *t = NULL;                                   \
 217         CHN_FOREACH(t, x, z) {                                          \
 218                 if (t == y)                                             \
 219                         break;                                          \
 220         }                                                               \
 221         if (t == y)                                                     \
 222                 CHN_REMOVE(x, y, z);                                    \
 223 } while (0)
 224
 225 #define CHN_INSERT_SORT(w, x, y, z)             do {                    \
 226         struct pcm_channel *t, *a = NULL;                               \
 227         CHN_FOREACH(t, x, z) {                                          \
 228                 if ((y)->unit w t->unit)                                \
 229                         a = t;                                          \
 230                 else                                                    \
 231                         break;                                          \
 232         }                                                               \
 233         if (a != NULL)                                                  \
 234                 CHN_INSERT_AFTER(a, y, z);                              \
 235         else                                                            \
 236                 CHN_INSERT_HEAD(x, y, z);                               \
 237 } while (0)
 238
 239 #define CHN_INSERT_SORT_ASCEND(x, y, z)         CHN_INSERT_SORT(>, x, y, z)
 240 #define CHN_INSERT_SORT_DESCEND(x, y, z)        CHN_INSERT_SORT(<, x, y, z)
 241
 242 #define CHN_UNIT(x)     (snd_unit2u((x)->unit))
 243 #define CHN_DEV(x)      (snd_unit2d((x)->unit))
 244 #define CHN_CHAN(x)     (snd_unit2c((x)->unit))
 245
 246 #define CHN_BUF_PARENT(x, y)                                            \
 247         (((x) != NULL && (x)->parentchannel != NULL &&                  \
 248         (x)->parentchannel->bufhard != NULL) ?                          \
 249         (x)->parentchannel->bufhard : (y))
 250
 251 #define CHN_BROADCAST(x)        do {                                    \
 252         if ((x)->cv_waiters != 0)                                       \
 253                 cv_broadcastpri(x, PRIBIO);                             \
 254 } while (0)
 255
 256 #include "channel_if.h"
 257
 258 int chn_reinit(struct pcm_channel *c);
 259 int chn_write(struct pcm_channel *c, struct uio *buf);
 260 int chn_read(struct pcm_channel *c, struct uio *buf);
 261 u_int32_t chn_start(struct pcm_channel *c, int force);
 262 int chn_sync(struct pcm_channel *c, int threshold);
 263 int chn_flush(struct pcm_channel *c);
 264 int chn_poll(struct pcm_channel *c, int ev, struct thread *td);
 265
 266 int chn_init(struct pcm_channel *c, void *devinfo, int dir, int direction);
 267 int chn_kill(struct pcm_channel *c);
 268 int chn_reset(struct pcm_channel *c, u_int32_t fmt, u_int32_t spd);
 269 int chn_setvolume(struct pcm_channel *c, int left, int right);
 270 int chn_setvolume_multi(struct pcm_channel *c, int vc, int left, int right,
 271     int center);
 272 int chn_setvolume_matrix(struct pcm_channel *c, int vc, int vt, int val);
 273 int chn_getvolume_matrix(struct pcm_channel *c, int vc, int vt);
 274 void chn_vpc_reset(struct pcm_channel *c, int vc, int force);
 275 int chn_setparam(struct pcm_channel *c, uint32_t format, uint32_t speed);
 276 int chn_setspeed(struct pcm_channel *c, uint32_t speed);
 277 int chn_setformat(struct pcm_channel *c, uint32_t format);
 278 int chn_setblocksize(struct pcm_channel *c, int blkcnt, int blksz);
 279 int chn_setlatency(struct pcm_channel *c, int latency);
 280 void chn_syncstate(struct pcm_channel *c);
 281 int chn_trigger(struct pcm_channel *c, int go);
 282 int chn_getptr(struct pcm_channel *c);
 283 struct pcmchan_caps *chn_getcaps(struct pcm_channel *c);
 284 u_int32_t chn_getformats(struct pcm_channel *c);
 285
 286 struct pcmchan_matrix *chn_getmatrix(struct pcm_channel *);
 287 int chn_setmatrix(struct pcm_channel *, struct pcmchan_matrix *);
 288
 289 int chn_oss_getorder(struct pcm_channel *, unsigned long long *);
 290 int chn_oss_setorder(struct pcm_channel *, unsigned long long *);
 291 int chn_oss_getmask(struct pcm_channel *, uint32_t *);
 292
 293 void chn_resetbuf(struct pcm_channel *c);
 294 void chn_intr_locked(struct pcm_channel *c);
 295 void chn_intr(struct pcm_channel *c);
 296 int chn_abort(struct pcm_channel *c);
 297
 298 int chn_notify(struct pcm_channel *c, u_int32_t flags);
 299
 300 int chn_getrates(struct pcm_channel *c, int **rates);
 301 int chn_syncdestroy(struct pcm_channel *c);
 302
 303 #define CHN_SETVOLUME(...)              chn_setvolume_matrix(__VA_ARGS__)
 304 #if defined(SND_DIAGNOSTIC) || defined(INVARIANTS)
 305 #define CHN_GETVOLUME(...)              chn_getvolume_matrix(__VA_ARGS__)
 306 #else
 307 #define CHN_GETVOLUME(x, y, z)          ((x)->volume[y][z])
 308 #endif
 309
 310 #ifdef OSSV4_EXPERIMENT
 311 int chn_getpeaks(struct pcm_channel *c, int *lpeak, int *rpeak);
 312 #endif
 313
 314 #define CHN_LOCKOWNED(c)        mtx_owned((c)->lock)
 315 #define CHN_LOCK(c)             mtx_lock((c)->lock)
 316 #define CHN_UNLOCK(c)           mtx_unlock((c)->lock)
 317 #define CHN_TRYLOCK(c)          mtx_trylock((c)->lock)
 318 #define CHN_LOCKASSERT(c)       mtx_assert((c)->lock, MA_OWNED)
 319 #define CHN_UNLOCKASSERT(c)     mtx_assert((c)->lock, MA_NOTOWNED)
 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
 329 extern int chn_latency;
 330 extern int chn_latency_profile;
 331 extern int report_soft_formats;
 332 extern int report_soft_matrix;
 333
 334 #define PCMDIR_PLAY             1
 335 #define PCMDIR_PLAY_VIRTUAL     2
 336 #define PCMDIR_REC              -1
 337 #define PCMDIR_REC_VIRTUAL      -2
 338
 339 #define PCMTRIG_START 1
 340 #define PCMTRIG_EMLDMAWR 2
 341 #define PCMTRIG_EMLDMARD 3
 342 #define PCMTRIG_STOP 0
 343 #define PCMTRIG_ABORT -1
 344
 345 #define PCMTRIG_COMMON(x)       ((x) == PCMTRIG_START ||                \
 346                                  (x) == PCMTRIG_STOP ||                 \
 347                                  (x) == PCMTRIG_ABORT)
 348
 349 #define CHN_F_CLOSING           0x00000001  /* a pending close */
 350 #define CHN_F_ABORTING          0x00000002  /* a pending abort */
 351 #define CHN_F_RUNNING           0x00000004  /* dma is running */
 352 #define CHN_F_TRIGGERED         0x00000008
 353 #define CHN_F_NOTRIGGER         0x00000010
 354 #define CHN_F_SLEEPING          0x00000020
 355
 356 #define CHN_F_NBIO              0x00000040  /* do non-blocking i/o */
 357 #define CHN_F_MMAP              0x00000080  /* has been mmap()ed */
 358
 359 #define CHN_F_BUSY              0x00000100  /* has been opened  */
 360 #define CHN_F_DIRTY             0x00000200  /* need re-config */
 361 #define CHN_F_DEAD              0x00000400  /* too many errors, dead, mdk */
 362 #define CHN_F_SILENCE           0x00000800  /* silence, nil, null, yada */
 363
 364 #define CHN_F_HAS_SIZE          0x00001000  /* user set block size */
 365 #define CHN_F_HAS_VCHAN         0x00002000  /* vchan master */
 366
 367 #define CHN_F_VCHAN_PASSTHROUGH 0x00004000  /* digital ac3/dts passthrough */
 368 #define CHN_F_VCHAN_ADAPTIVE    0x00008000  /* adaptive format/rate selection */
 369 #define CHN_F_VCHAN_DYNAMIC     (CHN_F_VCHAN_PASSTHROUGH | CHN_F_VCHAN_ADAPTIVE)
 370
 371 #define CHN_F_VIRTUAL           0x10000000  /* not backed by hardware */
 372 #define CHN_F_BITPERFECT        0x20000000  /* un-cooked, Heh.. */
 373 #define CHN_F_PASSTHROUGH       0x40000000  /* passthrough re-config */
 374 #define CHN_F_EXCLUSIVE         0x80000000  /* exclusive access */
 375
 376 #define CHN_F_BITS              "\020"                                  \
 377                                 "\001CLOSING"                           \
 378                                 "\002ABORTING"                          \
 379                                 "\003RUNNING"                           \
 380                                 "\004TRIGGERED"                         \
 381                                 "\005NOTRIGGER"                         \
 382                                 "\006SLEEPING"                          \
 383                                 "\007NBIO"                              \
 384                                 "\010MMAP"                              \
 385                                 "\011BUSY"                              \
 386                                 "\012DIRTY"                             \
 387                                 "\013DEAD"                              \
 388                                 "\014SILENCE"                           \
 389                                 "\015HAS_SIZE"                          \
 390                                 "\016HAS_VCHAN"                         \
 391                                 "\017VCHAN_PASSTHROUGH"                 \
 392                                 "\020VCHAN_ADAPTIVE"                    \
 393                                 "\035VIRTUAL"                           \
 394                                 "\036BITPERFECT"                        \
 395                                 "\037PASSTHROUGH"                       \
 396                                 "\040EXCLUSIVE"
 397
 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 |                  \
 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     5
 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))