1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 #ifndef __SOUND_PCM_H 3 #define __SOUND_PCM_H 4 5 /* 6 * Digital Audio (PCM) abstract layer 7 * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 8 * Abramo Bagnara <abramo@alsa-project.org> 9 */ 10 11 #include <sound/asound.h> 12 #include <sound/memalloc.h> 13 #include <sound/minors.h> 14 #include <linux/poll.h> 15 #include <linux/mm.h> 16 #include <linux/bitops.h> 17 #include <linux/pm_qos.h> 18 #include <linux/refcount.h> 19 20 #define snd_pcm_substream_chip(substream) ((substream)->private_data) 21 #define snd_pcm_chip(pcm) ((pcm)->private_data) 22 23 #if IS_ENABLED(CONFIG_SND_PCM_OSS) 24 #include <sound/pcm_oss.h> 25 #endif 26 27 /* 28 * Hardware (lowlevel) section 29 */ 30 31 struct snd_pcm_hardware { 32 unsigned int info; /* SNDRV_PCM_INFO_* */ 33 u64 formats; /* SNDRV_PCM_FMTBIT_* */ 34 unsigned int rates; /* SNDRV_PCM_RATE_* */ 35 unsigned int rate_min; /* min rate */ 36 unsigned int rate_max; /* max rate */ 37 unsigned int channels_min; /* min channels */ 38 unsigned int channels_max; /* max channels */ 39 size_t buffer_bytes_max; /* max buffer size */ 40 size_t period_bytes_min; /* min period size */ 41 size_t period_bytes_max; /* max period size */ 42 unsigned int periods_min; /* min # of periods */ 43 unsigned int periods_max; /* max # of periods */ 44 size_t fifo_size; /* fifo size in bytes */ 45 }; 46 47 struct snd_pcm_status64; 48 struct snd_pcm_substream; 49 50 struct snd_pcm_audio_tstamp_config; /* definitions further down */ 51 struct snd_pcm_audio_tstamp_report; 52 53 struct snd_pcm_ops { 54 int (*open)(struct snd_pcm_substream *substream); 55 int (*close)(struct snd_pcm_substream *substream); 56 int (*ioctl)(struct snd_pcm_substream * substream, 57 unsigned int cmd, void *arg); 58 int (*hw_params)(struct snd_pcm_substream *substream, 59 struct snd_pcm_hw_params *params); 60 int (*hw_free)(struct snd_pcm_substream *substream); 61 int (*prepare)(struct snd_pcm_substream *substream); 62 int (*trigger)(struct snd_pcm_substream *substream, int cmd); 63 int (*sync_stop)(struct snd_pcm_substream *substream); 64 snd_pcm_uframes_t (*pointer)(struct snd_pcm_substream *substream); 65 int (*get_time_info)(struct snd_pcm_substream *substream, 66 struct timespec64 *system_ts, struct timespec64 *audio_ts, 67 struct snd_pcm_audio_tstamp_config *audio_tstamp_config, 68 struct snd_pcm_audio_tstamp_report *audio_tstamp_report); 69 int (*fill_silence)(struct snd_pcm_substream *substream, int channel, 70 unsigned long pos, unsigned long bytes); 71 int (*copy_user)(struct snd_pcm_substream *substream, int channel, 72 unsigned long pos, void __user *buf, 73 unsigned long bytes); 74 int (*copy_kernel)(struct snd_pcm_substream *substream, int channel, 75 unsigned long pos, void *buf, unsigned long bytes); 76 struct page *(*page)(struct snd_pcm_substream *substream, 77 unsigned long offset); 78 int (*mmap)(struct snd_pcm_substream *substream, struct vm_area_struct *vma); 79 int (*ack)(struct snd_pcm_substream *substream); 80 }; 81 82 /* 83 * 84 */ 85 86 #if defined(CONFIG_SND_DYNAMIC_MINORS) 87 #define SNDRV_PCM_DEVICES (SNDRV_OS_MINORS-2) 88 #else 89 #define SNDRV_PCM_DEVICES 8 90 #endif 91 92 #define SNDRV_PCM_IOCTL1_RESET 0 93 /* 1 is absent slot. */ 94 #define SNDRV_PCM_IOCTL1_CHANNEL_INFO 2 95 /* 3 is absent slot. */ 96 #define SNDRV_PCM_IOCTL1_FIFO_SIZE 4 97 98 #define SNDRV_PCM_TRIGGER_STOP 0 99 #define SNDRV_PCM_TRIGGER_START 1 100 #define SNDRV_PCM_TRIGGER_PAUSE_PUSH 3 101 #define SNDRV_PCM_TRIGGER_PAUSE_RELEASE 4 102 #define SNDRV_PCM_TRIGGER_SUSPEND 5 103 #define SNDRV_PCM_TRIGGER_RESUME 6 104 #define SNDRV_PCM_TRIGGER_DRAIN 7 105 106 #define SNDRV_PCM_POS_XRUN ((snd_pcm_uframes_t)-1) 107 108 /* If you change this don't forget to change rates[] table in pcm_native.c */ 109 #define SNDRV_PCM_RATE_5512 (1U<<0) /* 5512Hz */ 110 #define SNDRV_PCM_RATE_8000 (1U<<1) /* 8000Hz */ 111 #define SNDRV_PCM_RATE_11025 (1U<<2) /* 11025Hz */ 112 #define SNDRV_PCM_RATE_16000 (1U<<3) /* 16000Hz */ 113 #define SNDRV_PCM_RATE_22050 (1U<<4) /* 22050Hz */ 114 #define SNDRV_PCM_RATE_32000 (1U<<5) /* 32000Hz */ 115 #define SNDRV_PCM_RATE_44100 (1U<<6) /* 44100Hz */ 116 #define SNDRV_PCM_RATE_48000 (1U<<7) /* 48000Hz */ 117 #define SNDRV_PCM_RATE_64000 (1U<<8) /* 64000Hz */ 118 #define SNDRV_PCM_RATE_88200 (1U<<9) /* 88200Hz */ 119 #define SNDRV_PCM_RATE_96000 (1U<<10) /* 96000Hz */ 120 #define SNDRV_PCM_RATE_176400 (1U<<11) /* 176400Hz */ 121 #define SNDRV_PCM_RATE_192000 (1U<<12) /* 192000Hz */ 122 #define SNDRV_PCM_RATE_352800 (1U<<13) /* 352800Hz */ 123 #define SNDRV_PCM_RATE_384000 (1U<<14) /* 384000Hz */ 124 125 #define SNDRV_PCM_RATE_CONTINUOUS (1U<<30) /* continuous range */ 126 #define SNDRV_PCM_RATE_KNOT (1U<<31) /* supports more non-continuos rates */ 127 128 #define SNDRV_PCM_RATE_8000_44100 (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|\ 129 SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|\ 130 SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100) 131 #define SNDRV_PCM_RATE_8000_48000 (SNDRV_PCM_RATE_8000_44100|SNDRV_PCM_RATE_48000) 132 #define SNDRV_PCM_RATE_8000_96000 (SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_64000|\ 133 SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000) 134 #define SNDRV_PCM_RATE_8000_192000 (SNDRV_PCM_RATE_8000_96000|SNDRV_PCM_RATE_176400|\ 135 SNDRV_PCM_RATE_192000) 136 #define SNDRV_PCM_RATE_8000_384000 (SNDRV_PCM_RATE_8000_192000|\ 137 SNDRV_PCM_RATE_352800|\ 138 SNDRV_PCM_RATE_384000) 139 #define _SNDRV_PCM_FMTBIT(fmt) (1ULL << (__force int)SNDRV_PCM_FORMAT_##fmt) 140 #define SNDRV_PCM_FMTBIT_S8 _SNDRV_PCM_FMTBIT(S8) 141 #define SNDRV_PCM_FMTBIT_U8 _SNDRV_PCM_FMTBIT(U8) 142 #define SNDRV_PCM_FMTBIT_S16_LE _SNDRV_PCM_FMTBIT(S16_LE) 143 #define SNDRV_PCM_FMTBIT_S16_BE _SNDRV_PCM_FMTBIT(S16_BE) 144 #define SNDRV_PCM_FMTBIT_U16_LE _SNDRV_PCM_FMTBIT(U16_LE) 145 #define SNDRV_PCM_FMTBIT_U16_BE _SNDRV_PCM_FMTBIT(U16_BE) 146 #define SNDRV_PCM_FMTBIT_S24_LE _SNDRV_PCM_FMTBIT(S24_LE) 147 #define SNDRV_PCM_FMTBIT_S24_BE _SNDRV_PCM_FMTBIT(S24_BE) 148 #define SNDRV_PCM_FMTBIT_U24_LE _SNDRV_PCM_FMTBIT(U24_LE) 149 #define SNDRV_PCM_FMTBIT_U24_BE _SNDRV_PCM_FMTBIT(U24_BE) 150 // For S32/U32 formats, 'msbits' hardware parameter is often used to deliver information about the 151 // available bit count in most significant bit. It's for the case of so-called 'left-justified' or 152 // `right-padding` sample which has less width than 32 bit. 153 #define SNDRV_PCM_FMTBIT_S32_LE _SNDRV_PCM_FMTBIT(S32_LE) 154 #define SNDRV_PCM_FMTBIT_S32_BE _SNDRV_PCM_FMTBIT(S32_BE) 155 #define SNDRV_PCM_FMTBIT_U32_LE _SNDRV_PCM_FMTBIT(U32_LE) 156 #define SNDRV_PCM_FMTBIT_U32_BE _SNDRV_PCM_FMTBIT(U32_BE) 157 #define SNDRV_PCM_FMTBIT_FLOAT_LE _SNDRV_PCM_FMTBIT(FLOAT_LE) 158 #define SNDRV_PCM_FMTBIT_FLOAT_BE _SNDRV_PCM_FMTBIT(FLOAT_BE) 159 #define SNDRV_PCM_FMTBIT_FLOAT64_LE _SNDRV_PCM_FMTBIT(FLOAT64_LE) 160 #define SNDRV_PCM_FMTBIT_FLOAT64_BE _SNDRV_PCM_FMTBIT(FLOAT64_BE) 161 #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE _SNDRV_PCM_FMTBIT(IEC958_SUBFRAME_LE) 162 #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE _SNDRV_PCM_FMTBIT(IEC958_SUBFRAME_BE) 163 #define SNDRV_PCM_FMTBIT_MU_LAW _SNDRV_PCM_FMTBIT(MU_LAW) 164 #define SNDRV_PCM_FMTBIT_A_LAW _SNDRV_PCM_FMTBIT(A_LAW) 165 #define SNDRV_PCM_FMTBIT_IMA_ADPCM _SNDRV_PCM_FMTBIT(IMA_ADPCM) 166 #define SNDRV_PCM_FMTBIT_MPEG _SNDRV_PCM_FMTBIT(MPEG) 167 #define SNDRV_PCM_FMTBIT_GSM _SNDRV_PCM_FMTBIT(GSM) 168 #define SNDRV_PCM_FMTBIT_S20_LE _SNDRV_PCM_FMTBIT(S20_LE) 169 #define SNDRV_PCM_FMTBIT_U20_LE _SNDRV_PCM_FMTBIT(U20_LE) 170 #define SNDRV_PCM_FMTBIT_S20_BE _SNDRV_PCM_FMTBIT(S20_BE) 171 #define SNDRV_PCM_FMTBIT_U20_BE _SNDRV_PCM_FMTBIT(U20_BE) 172 #define SNDRV_PCM_FMTBIT_SPECIAL _SNDRV_PCM_FMTBIT(SPECIAL) 173 #define SNDRV_PCM_FMTBIT_S24_3LE _SNDRV_PCM_FMTBIT(S24_3LE) 174 #define SNDRV_PCM_FMTBIT_U24_3LE _SNDRV_PCM_FMTBIT(U24_3LE) 175 #define SNDRV_PCM_FMTBIT_S24_3BE _SNDRV_PCM_FMTBIT(S24_3BE) 176 #define SNDRV_PCM_FMTBIT_U24_3BE _SNDRV_PCM_FMTBIT(U24_3BE) 177 #define SNDRV_PCM_FMTBIT_S20_3LE _SNDRV_PCM_FMTBIT(S20_3LE) 178 #define SNDRV_PCM_FMTBIT_U20_3LE _SNDRV_PCM_FMTBIT(U20_3LE) 179 #define SNDRV_PCM_FMTBIT_S20_3BE _SNDRV_PCM_FMTBIT(S20_3BE) 180 #define SNDRV_PCM_FMTBIT_U20_3BE _SNDRV_PCM_FMTBIT(U20_3BE) 181 #define SNDRV_PCM_FMTBIT_S18_3LE _SNDRV_PCM_FMTBIT(S18_3LE) 182 #define SNDRV_PCM_FMTBIT_U18_3LE _SNDRV_PCM_FMTBIT(U18_3LE) 183 #define SNDRV_PCM_FMTBIT_S18_3BE _SNDRV_PCM_FMTBIT(S18_3BE) 184 #define SNDRV_PCM_FMTBIT_U18_3BE _SNDRV_PCM_FMTBIT(U18_3BE) 185 #define SNDRV_PCM_FMTBIT_G723_24 _SNDRV_PCM_FMTBIT(G723_24) 186 #define SNDRV_PCM_FMTBIT_G723_24_1B _SNDRV_PCM_FMTBIT(G723_24_1B) 187 #define SNDRV_PCM_FMTBIT_G723_40 _SNDRV_PCM_FMTBIT(G723_40) 188 #define SNDRV_PCM_FMTBIT_G723_40_1B _SNDRV_PCM_FMTBIT(G723_40_1B) 189 #define SNDRV_PCM_FMTBIT_DSD_U8 _SNDRV_PCM_FMTBIT(DSD_U8) 190 #define SNDRV_PCM_FMTBIT_DSD_U16_LE _SNDRV_PCM_FMTBIT(DSD_U16_LE) 191 #define SNDRV_PCM_FMTBIT_DSD_U32_LE _SNDRV_PCM_FMTBIT(DSD_U32_LE) 192 #define SNDRV_PCM_FMTBIT_DSD_U16_BE _SNDRV_PCM_FMTBIT(DSD_U16_BE) 193 #define SNDRV_PCM_FMTBIT_DSD_U32_BE _SNDRV_PCM_FMTBIT(DSD_U32_BE) 194 195 #ifdef SNDRV_LITTLE_ENDIAN 196 #define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_LE 197 #define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_LE 198 #define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_LE 199 #define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_LE 200 #define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_LE 201 #define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_LE 202 #define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_LE 203 #define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_LE 204 #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE 205 #define SNDRV_PCM_FMTBIT_S20 SNDRV_PCM_FMTBIT_S20_LE 206 #define SNDRV_PCM_FMTBIT_U20 SNDRV_PCM_FMTBIT_U20_LE 207 #endif 208 #ifdef SNDRV_BIG_ENDIAN 209 #define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_BE 210 #define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_BE 211 #define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_BE 212 #define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_BE 213 #define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_BE 214 #define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_BE 215 #define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_BE 216 #define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_BE 217 #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE 218 #define SNDRV_PCM_FMTBIT_S20 SNDRV_PCM_FMTBIT_S20_BE 219 #define SNDRV_PCM_FMTBIT_U20 SNDRV_PCM_FMTBIT_U20_BE 220 #endif 221 222 struct snd_pcm_file { 223 struct snd_pcm_substream *substream; 224 int no_compat_mmap; 225 unsigned int user_pversion; /* supported protocol version */ 226 }; 227 228 struct snd_pcm_hw_rule; 229 typedef int (*snd_pcm_hw_rule_func_t)(struct snd_pcm_hw_params *params, 230 struct snd_pcm_hw_rule *rule); 231 232 struct snd_pcm_hw_rule { 233 unsigned int cond; 234 int var; 235 int deps[5]; 236 237 snd_pcm_hw_rule_func_t func; 238 void *private; 239 }; 240 241 struct snd_pcm_hw_constraints { 242 struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - 243 SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; 244 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - 245 SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1]; 246 unsigned int rules_num; 247 unsigned int rules_all; 248 struct snd_pcm_hw_rule *rules; 249 }; 250 251 static inline struct snd_mask *constrs_mask(struct snd_pcm_hw_constraints *constrs, 252 snd_pcm_hw_param_t var) 253 { 254 return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; 255 } 256 257 static inline struct snd_interval *constrs_interval(struct snd_pcm_hw_constraints *constrs, 258 snd_pcm_hw_param_t var) 259 { 260 return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; 261 } 262 263 struct snd_ratnum { 264 unsigned int num; 265 unsigned int den_min, den_max, den_step; 266 }; 267 268 struct snd_ratden { 269 unsigned int num_min, num_max, num_step; 270 unsigned int den; 271 }; 272 273 struct snd_pcm_hw_constraint_ratnums { 274 int nrats; 275 const struct snd_ratnum *rats; 276 }; 277 278 struct snd_pcm_hw_constraint_ratdens { 279 int nrats; 280 const struct snd_ratden *rats; 281 }; 282 283 struct snd_pcm_hw_constraint_list { 284 const unsigned int *list; 285 unsigned int count; 286 unsigned int mask; 287 }; 288 289 struct snd_pcm_hw_constraint_ranges { 290 unsigned int count; 291 const struct snd_interval *ranges; 292 unsigned int mask; 293 }; 294 295 /* 296 * userspace-provided audio timestamp config to kernel, 297 * structure is for internal use only and filled with dedicated unpack routine 298 */ 299 struct snd_pcm_audio_tstamp_config { 300 /* 5 of max 16 bits used */ 301 u32 type_requested:4; 302 u32 report_delay:1; /* add total delay to A/D or D/A */ 303 }; 304 305 static inline void snd_pcm_unpack_audio_tstamp_config(__u32 data, 306 struct snd_pcm_audio_tstamp_config *config) 307 { 308 config->type_requested = data & 0xF; 309 config->report_delay = (data >> 4) & 1; 310 } 311 312 /* 313 * kernel-provided audio timestamp report to user-space 314 * structure is for internal use only and read by dedicated pack routine 315 */ 316 struct snd_pcm_audio_tstamp_report { 317 /* 6 of max 16 bits used for bit-fields */ 318 319 /* for backwards compatibility */ 320 u32 valid:1; 321 322 /* actual type if hardware could not support requested timestamp */ 323 u32 actual_type:4; 324 325 /* accuracy represented in ns units */ 326 u32 accuracy_report:1; /* 0 if accuracy unknown, 1 if accuracy field is valid */ 327 u32 accuracy; /* up to 4.29s, will be packed in separate field */ 328 }; 329 330 static inline void snd_pcm_pack_audio_tstamp_report(__u32 *data, __u32 *accuracy, 331 const struct snd_pcm_audio_tstamp_report *report) 332 { 333 u32 tmp; 334 335 tmp = report->accuracy_report; 336 tmp <<= 4; 337 tmp |= report->actual_type; 338 tmp <<= 1; 339 tmp |= report->valid; 340 341 *data &= 0xffff; /* zero-clear MSBs */ 342 *data |= (tmp << 16); 343 *accuracy = report->accuracy; 344 } 345 346 347 struct snd_pcm_runtime { 348 /* -- Status -- */ 349 snd_pcm_state_t state; /* stream state */ 350 snd_pcm_state_t suspended_state; /* suspended stream state */ 351 struct snd_pcm_substream *trigger_master; 352 struct timespec64 trigger_tstamp; /* trigger timestamp */ 353 bool trigger_tstamp_latched; /* trigger timestamp latched in low-level driver/hardware */ 354 int overrange; 355 snd_pcm_uframes_t avail_max; 356 snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */ 357 snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time */ 358 unsigned long hw_ptr_jiffies; /* Time when hw_ptr is updated */ 359 unsigned long hw_ptr_buffer_jiffies; /* buffer time in jiffies */ 360 snd_pcm_sframes_t delay; /* extra delay; typically FIFO size */ 361 u64 hw_ptr_wrap; /* offset for hw_ptr due to boundary wrap-around */ 362 363 /* -- HW params -- */ 364 snd_pcm_access_t access; /* access mode */ 365 snd_pcm_format_t format; /* SNDRV_PCM_FORMAT_* */ 366 snd_pcm_subformat_t subformat; /* subformat */ 367 unsigned int rate; /* rate in Hz */ 368 unsigned int channels; /* channels */ 369 snd_pcm_uframes_t period_size; /* period size */ 370 unsigned int periods; /* periods */ 371 snd_pcm_uframes_t buffer_size; /* buffer size */ 372 snd_pcm_uframes_t min_align; /* Min alignment for the format */ 373 size_t byte_align; 374 unsigned int frame_bits; 375 unsigned int sample_bits; 376 unsigned int info; 377 unsigned int rate_num; 378 unsigned int rate_den; 379 unsigned int no_period_wakeup: 1; 380 381 /* -- SW params; see struct snd_pcm_sw_params for comments -- */ 382 int tstamp_mode; 383 unsigned int period_step; 384 snd_pcm_uframes_t start_threshold; 385 snd_pcm_uframes_t stop_threshold; 386 snd_pcm_uframes_t silence_threshold; 387 snd_pcm_uframes_t silence_size; 388 snd_pcm_uframes_t boundary; 389 390 /* internal data of auto-silencer */ 391 snd_pcm_uframes_t silence_start; /* starting pointer to silence area */ 392 snd_pcm_uframes_t silence_filled; /* already filled part of silence area */ 393 394 union snd_pcm_sync_id sync; /* hardware synchronization ID */ 395 396 /* -- mmap -- */ 397 struct snd_pcm_mmap_status *status; 398 struct snd_pcm_mmap_control *control; 399 400 /* -- locking / scheduling -- */ 401 snd_pcm_uframes_t twake; /* do transfer (!poll) wakeup if non-zero */ 402 wait_queue_head_t sleep; /* poll sleep */ 403 wait_queue_head_t tsleep; /* transfer sleep */ 404 struct snd_fasync *fasync; 405 bool stop_operating; /* sync_stop will be called */ 406 struct mutex buffer_mutex; /* protect for buffer changes */ 407 atomic_t buffer_accessing; /* >0: in r/w operation, <0: blocked */ 408 409 /* -- private section -- */ 410 void *private_data; 411 void (*private_free)(struct snd_pcm_runtime *runtime); 412 413 /* -- hardware description -- */ 414 struct snd_pcm_hardware hw; 415 struct snd_pcm_hw_constraints hw_constraints; 416 417 /* -- timer -- */ 418 unsigned int timer_resolution; /* timer resolution */ 419 int tstamp_type; /* timestamp type */ 420 421 /* -- DMA -- */ 422 unsigned char *dma_area; /* DMA area */ 423 dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */ 424 size_t dma_bytes; /* size of DMA area */ 425 426 struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */ 427 unsigned int buffer_changed:1; /* buffer allocation changed; set only in managed mode */ 428 429 /* -- audio timestamp config -- */ 430 struct snd_pcm_audio_tstamp_config audio_tstamp_config; 431 struct snd_pcm_audio_tstamp_report audio_tstamp_report; 432 struct timespec64 driver_tstamp; 433 434 #if IS_ENABLED(CONFIG_SND_PCM_OSS) 435 /* -- OSS things -- */ 436 struct snd_pcm_oss_runtime oss; 437 #endif 438 }; 439 440 struct snd_pcm_group { /* keep linked substreams */ 441 spinlock_t lock; 442 struct mutex mutex; 443 struct list_head substreams; 444 refcount_t refs; 445 }; 446 447 struct pid; 448 449 struct snd_pcm_substream { 450 struct snd_pcm *pcm; 451 struct snd_pcm_str *pstr; 452 void *private_data; /* copied from pcm->private_data */ 453 int number; 454 char name[32]; /* substream name */ 455 int stream; /* stream (direction) */ 456 struct pm_qos_request latency_pm_qos_req; /* pm_qos request */ 457 size_t buffer_bytes_max; /* limit ring buffer size */ 458 struct snd_dma_buffer dma_buffer; 459 size_t dma_max; 460 /* -- hardware operations -- */ 461 const struct snd_pcm_ops *ops; 462 /* -- runtime information -- */ 463 struct snd_pcm_runtime *runtime; 464 /* -- timer section -- */ 465 struct snd_timer *timer; /* timer */ 466 unsigned timer_running: 1; /* time is running */ 467 long wait_time; /* time in ms for R/W to wait for avail */ 468 /* -- next substream -- */ 469 struct snd_pcm_substream *next; 470 /* -- linked substreams -- */ 471 struct list_head link_list; /* linked list member */ 472 struct snd_pcm_group self_group; /* fake group for non linked substream (with substream lock inside) */ 473 struct snd_pcm_group *group; /* pointer to current group */ 474 /* -- assigned files -- */ 475 int ref_count; 476 atomic_t mmap_count; 477 unsigned int f_flags; 478 void (*pcm_release)(struct snd_pcm_substream *); 479 struct pid *pid; 480 #if IS_ENABLED(CONFIG_SND_PCM_OSS) 481 /* -- OSS things -- */ 482 struct snd_pcm_oss_substream oss; 483 #endif 484 #ifdef CONFIG_SND_VERBOSE_PROCFS 485 struct snd_info_entry *proc_root; 486 #endif /* CONFIG_SND_VERBOSE_PROCFS */ 487 /* misc flags */ 488 unsigned int hw_opened: 1; 489 unsigned int managed_buffer_alloc:1; 490 }; 491 492 #define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0) 493 494 495 struct snd_pcm_str { 496 int stream; /* stream (direction) */ 497 struct snd_pcm *pcm; 498 /* -- substreams -- */ 499 unsigned int substream_count; 500 unsigned int substream_opened; 501 struct snd_pcm_substream *substream; 502 #if IS_ENABLED(CONFIG_SND_PCM_OSS) 503 /* -- OSS things -- */ 504 struct snd_pcm_oss_stream oss; 505 #endif 506 #ifdef CONFIG_SND_VERBOSE_PROCFS 507 struct snd_info_entry *proc_root; 508 #ifdef CONFIG_SND_PCM_XRUN_DEBUG 509 unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */ 510 #endif 511 #endif 512 struct snd_kcontrol *chmap_kctl; /* channel-mapping controls */ 513 struct device dev; 514 }; 515 516 struct snd_pcm { 517 struct snd_card *card; 518 struct list_head list; 519 int device; /* device number */ 520 unsigned int info_flags; 521 unsigned short dev_class; 522 unsigned short dev_subclass; 523 char id[64]; 524 char name[80]; 525 struct snd_pcm_str streams[2]; 526 struct mutex open_mutex; 527 wait_queue_head_t open_wait; 528 void *private_data; 529 void (*private_free) (struct snd_pcm *pcm); 530 bool internal; /* pcm is for internal use only */ 531 bool nonatomic; /* whole PCM operations are in non-atomic context */ 532 bool no_device_suspend; /* don't invoke device PM suspend */ 533 #if IS_ENABLED(CONFIG_SND_PCM_OSS) 534 struct snd_pcm_oss oss; 535 #endif 536 }; 537 538 /* 539 * Registering 540 */ 541 542 extern const struct file_operations snd_pcm_f_ops[2]; 543 544 int snd_pcm_new(struct snd_card *card, const char *id, int device, 545 int playback_count, int capture_count, 546 struct snd_pcm **rpcm); 547 int snd_pcm_new_internal(struct snd_card *card, const char *id, int device, 548 int playback_count, int capture_count, 549 struct snd_pcm **rpcm); 550 int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count); 551 552 #if IS_ENABLED(CONFIG_SND_PCM_OSS) 553 struct snd_pcm_notify { 554 int (*n_register) (struct snd_pcm * pcm); 555 int (*n_disconnect) (struct snd_pcm * pcm); 556 int (*n_unregister) (struct snd_pcm * pcm); 557 struct list_head list; 558 }; 559 int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree); 560 #endif 561 562 /* 563 * Native I/O 564 */ 565 566 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info); 567 int snd_pcm_info_user(struct snd_pcm_substream *substream, 568 struct snd_pcm_info __user *info); 569 int snd_pcm_status64(struct snd_pcm_substream *substream, 570 struct snd_pcm_status64 *status); 571 int snd_pcm_start(struct snd_pcm_substream *substream); 572 int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t status); 573 int snd_pcm_drain_done(struct snd_pcm_substream *substream); 574 int snd_pcm_stop_xrun(struct snd_pcm_substream *substream); 575 #ifdef CONFIG_PM 576 int snd_pcm_suspend_all(struct snd_pcm *pcm); 577 #else 578 static inline int snd_pcm_suspend_all(struct snd_pcm *pcm) 579 { 580 return 0; 581 } 582 #endif 583 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg); 584 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file, 585 struct snd_pcm_substream **rsubstream); 586 void snd_pcm_release_substream(struct snd_pcm_substream *substream); 587 int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file, 588 struct snd_pcm_substream **rsubstream); 589 void snd_pcm_detach_substream(struct snd_pcm_substream *substream); 590 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area); 591 592 593 #ifdef CONFIG_SND_DEBUG 594 void snd_pcm_debug_name(struct snd_pcm_substream *substream, 595 char *name, size_t len); 596 #else 597 static inline void 598 snd_pcm_debug_name(struct snd_pcm_substream *substream, char *buf, size_t size) 599 { 600 *buf = 0; 601 } 602 #endif 603 604 /* 605 * PCM library 606 */ 607 608 /** 609 * snd_pcm_stream_linked - Check whether the substream is linked with others 610 * @substream: substream to check 611 * 612 * Return: true if the given substream is being linked with others 613 */ 614 static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream) 615 { 616 return substream->group != &substream->self_group; 617 } 618 619 void snd_pcm_stream_lock(struct snd_pcm_substream *substream); 620 void snd_pcm_stream_unlock(struct snd_pcm_substream *substream); 621 void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream); 622 void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream); 623 unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream); 624 unsigned long _snd_pcm_stream_lock_irqsave_nested(struct snd_pcm_substream *substream); 625 626 /** 627 * snd_pcm_stream_lock_irqsave - Lock the PCM stream 628 * @substream: PCM substream 629 * @flags: irq flags 630 * 631 * This locks the PCM stream like snd_pcm_stream_lock() but with the local 632 * IRQ (only when nonatomic is false). In nonatomic case, this is identical 633 * as snd_pcm_stream_lock(). 634 */ 635 #define snd_pcm_stream_lock_irqsave(substream, flags) \ 636 do { \ 637 typecheck(unsigned long, flags); \ 638 flags = _snd_pcm_stream_lock_irqsave(substream); \ 639 } while (0) 640 void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream, 641 unsigned long flags); 642 643 /** 644 * snd_pcm_stream_lock_irqsave_nested - Single-nested PCM stream locking 645 * @substream: PCM substream 646 * @flags: irq flags 647 * 648 * This locks the PCM stream like snd_pcm_stream_lock_irqsave() but with 649 * the single-depth lockdep subclass. 650 */ 651 #define snd_pcm_stream_lock_irqsave_nested(substream, flags) \ 652 do { \ 653 typecheck(unsigned long, flags); \ 654 flags = _snd_pcm_stream_lock_irqsave_nested(substream); \ 655 } while (0) 656 657 /** 658 * snd_pcm_group_for_each_entry - iterate over the linked substreams 659 * @s: the iterator 660 * @substream: the substream 661 * 662 * Iterate over the all linked substreams to the given @substream. 663 * When @substream isn't linked with any others, this gives returns @substream 664 * itself once. 665 */ 666 #define snd_pcm_group_for_each_entry(s, substream) \ 667 list_for_each_entry(s, &substream->group->substreams, link_list) 668 669 #define for_each_pcm_streams(stream) \ 670 for (stream = SNDRV_PCM_STREAM_PLAYBACK; \ 671 stream <= SNDRV_PCM_STREAM_LAST; \ 672 stream++) 673 674 /** 675 * snd_pcm_running - Check whether the substream is in a running state 676 * @substream: substream to check 677 * 678 * Return: true if the given substream is in the state RUNNING, or in the 679 * state DRAINING for playback. 680 */ 681 static inline int snd_pcm_running(struct snd_pcm_substream *substream) 682 { 683 return (substream->runtime->state == SNDRV_PCM_STATE_RUNNING || 684 (substream->runtime->state == SNDRV_PCM_STATE_DRAINING && 685 substream->stream == SNDRV_PCM_STREAM_PLAYBACK)); 686 } 687 688 /** 689 * __snd_pcm_set_state - Change the current PCM state 690 * @runtime: PCM runtime to set 691 * @state: the current state to set 692 * 693 * Call within the stream lock 694 */ 695 static inline void __snd_pcm_set_state(struct snd_pcm_runtime *runtime, 696 snd_pcm_state_t state) 697 { 698 runtime->state = state; 699 runtime->status->state = state; /* copy for mmap */ 700 } 701 702 /** 703 * bytes_to_samples - Unit conversion of the size from bytes to samples 704 * @runtime: PCM runtime instance 705 * @size: size in bytes 706 * 707 * Return: the size in samples 708 */ 709 static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size) 710 { 711 return size * 8 / runtime->sample_bits; 712 } 713 714 /** 715 * bytes_to_frames - Unit conversion of the size from bytes to frames 716 * @runtime: PCM runtime instance 717 * @size: size in bytes 718 * 719 * Return: the size in frames 720 */ 721 static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size) 722 { 723 return size * 8 / runtime->frame_bits; 724 } 725 726 /** 727 * samples_to_bytes - Unit conversion of the size from samples to bytes 728 * @runtime: PCM runtime instance 729 * @size: size in samples 730 * 731 * Return: the byte size 732 */ 733 static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size) 734 { 735 return size * runtime->sample_bits / 8; 736 } 737 738 /** 739 * frames_to_bytes - Unit conversion of the size from frames to bytes 740 * @runtime: PCM runtime instance 741 * @size: size in frames 742 * 743 * Return: the byte size 744 */ 745 static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size) 746 { 747 return size * runtime->frame_bits / 8; 748 } 749 750 /** 751 * frame_aligned - Check whether the byte size is aligned to frames 752 * @runtime: PCM runtime instance 753 * @bytes: size in bytes 754 * 755 * Return: true if aligned, or false if not 756 */ 757 static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes) 758 { 759 return bytes % runtime->byte_align == 0; 760 } 761 762 /** 763 * snd_pcm_lib_buffer_bytes - Get the buffer size of the current PCM in bytes 764 * @substream: PCM substream 765 * 766 * Return: buffer byte size 767 */ 768 static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream) 769 { 770 struct snd_pcm_runtime *runtime = substream->runtime; 771 return frames_to_bytes(runtime, runtime->buffer_size); 772 } 773 774 /** 775 * snd_pcm_lib_period_bytes - Get the period size of the current PCM in bytes 776 * @substream: PCM substream 777 * 778 * Return: period byte size 779 */ 780 static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream) 781 { 782 struct snd_pcm_runtime *runtime = substream->runtime; 783 return frames_to_bytes(runtime, runtime->period_size); 784 } 785 786 /** 787 * snd_pcm_playback_avail - Get the available (writable) space for playback 788 * @runtime: PCM runtime instance 789 * 790 * Result is between 0 ... (boundary - 1) 791 * 792 * Return: available frame size 793 */ 794 static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime) 795 { 796 snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr; 797 if (avail < 0) 798 avail += runtime->boundary; 799 else if ((snd_pcm_uframes_t) avail >= runtime->boundary) 800 avail -= runtime->boundary; 801 return avail; 802 } 803 804 /** 805 * snd_pcm_capture_avail - Get the available (readable) space for capture 806 * @runtime: PCM runtime instance 807 * 808 * Result is between 0 ... (boundary - 1) 809 * 810 * Return: available frame size 811 */ 812 static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime) 813 { 814 snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr; 815 if (avail < 0) 816 avail += runtime->boundary; 817 return avail; 818 } 819 820 /** 821 * snd_pcm_playback_hw_avail - Get the queued space for playback 822 * @runtime: PCM runtime instance 823 * 824 * Return: available frame size 825 */ 826 static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime) 827 { 828 return runtime->buffer_size - snd_pcm_playback_avail(runtime); 829 } 830 831 /** 832 * snd_pcm_capture_hw_avail - Get the free space for capture 833 * @runtime: PCM runtime instance 834 * 835 * Return: available frame size 836 */ 837 static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime) 838 { 839 return runtime->buffer_size - snd_pcm_capture_avail(runtime); 840 } 841 842 /** 843 * snd_pcm_playback_ready - check whether the playback buffer is available 844 * @substream: the pcm substream instance 845 * 846 * Checks whether enough free space is available on the playback buffer. 847 * 848 * Return: Non-zero if available, or zero if not. 849 */ 850 static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream) 851 { 852 struct snd_pcm_runtime *runtime = substream->runtime; 853 return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min; 854 } 855 856 /** 857 * snd_pcm_capture_ready - check whether the capture buffer is available 858 * @substream: the pcm substream instance 859 * 860 * Checks whether enough capture data is available on the capture buffer. 861 * 862 * Return: Non-zero if available, or zero if not. 863 */ 864 static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream) 865 { 866 struct snd_pcm_runtime *runtime = substream->runtime; 867 return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min; 868 } 869 870 /** 871 * snd_pcm_playback_data - check whether any data exists on the playback buffer 872 * @substream: the pcm substream instance 873 * 874 * Checks whether any data exists on the playback buffer. 875 * 876 * Return: Non-zero if any data exists, or zero if not. If stop_threshold 877 * is bigger or equal to boundary, then this function returns always non-zero. 878 */ 879 static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream) 880 { 881 struct snd_pcm_runtime *runtime = substream->runtime; 882 883 if (runtime->stop_threshold >= runtime->boundary) 884 return 1; 885 return snd_pcm_playback_avail(runtime) < runtime->buffer_size; 886 } 887 888 /** 889 * snd_pcm_playback_empty - check whether the playback buffer is empty 890 * @substream: the pcm substream instance 891 * 892 * Checks whether the playback buffer is empty. 893 * 894 * Return: Non-zero if empty, or zero if not. 895 */ 896 static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream) 897 { 898 struct snd_pcm_runtime *runtime = substream->runtime; 899 return snd_pcm_playback_avail(runtime) >= runtime->buffer_size; 900 } 901 902 /** 903 * snd_pcm_capture_empty - check whether the capture buffer is empty 904 * @substream: the pcm substream instance 905 * 906 * Checks whether the capture buffer is empty. 907 * 908 * Return: Non-zero if empty, or zero if not. 909 */ 910 static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream) 911 { 912 struct snd_pcm_runtime *runtime = substream->runtime; 913 return snd_pcm_capture_avail(runtime) == 0; 914 } 915 916 /** 917 * snd_pcm_trigger_done - Mark the master substream 918 * @substream: the pcm substream instance 919 * @master: the linked master substream 920 * 921 * When multiple substreams of the same card are linked and the hardware 922 * supports the single-shot operation, the driver calls this in the loop 923 * in snd_pcm_group_for_each_entry() for marking the substream as "done". 924 * Then most of trigger operations are performed only to the given master 925 * substream. 926 * 927 * The trigger_master mark is cleared at timestamp updates at the end 928 * of trigger operations. 929 */ 930 static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream, 931 struct snd_pcm_substream *master) 932 { 933 substream->runtime->trigger_master = master; 934 } 935 936 static inline int hw_is_mask(int var) 937 { 938 return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK && 939 var <= SNDRV_PCM_HW_PARAM_LAST_MASK; 940 } 941 942 static inline int hw_is_interval(int var) 943 { 944 return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL && 945 var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; 946 } 947 948 static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params, 949 snd_pcm_hw_param_t var) 950 { 951 return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; 952 } 953 954 static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params, 955 snd_pcm_hw_param_t var) 956 { 957 return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; 958 } 959 960 static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params, 961 snd_pcm_hw_param_t var) 962 { 963 return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; 964 } 965 966 static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params, 967 snd_pcm_hw_param_t var) 968 { 969 return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; 970 } 971 972 /** 973 * params_channels - Get the number of channels from the hw params 974 * @p: hw params 975 * 976 * Return: the number of channels 977 */ 978 static inline unsigned int params_channels(const struct snd_pcm_hw_params *p) 979 { 980 return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_CHANNELS)->min; 981 } 982 983 /** 984 * params_rate - Get the sample rate from the hw params 985 * @p: hw params 986 * 987 * Return: the sample rate 988 */ 989 static inline unsigned int params_rate(const struct snd_pcm_hw_params *p) 990 { 991 return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_RATE)->min; 992 } 993 994 /** 995 * params_period_size - Get the period size (in frames) from the hw params 996 * @p: hw params 997 * 998 * Return: the period size in frames 999 */ 1000 static inline unsigned int params_period_size(const struct snd_pcm_hw_params *p) 1001 { 1002 return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min; 1003 } 1004 1005 /** 1006 * params_periods - Get the number of periods from the hw params 1007 * @p: hw params 1008 * 1009 * Return: the number of periods 1010 */ 1011 static inline unsigned int params_periods(const struct snd_pcm_hw_params *p) 1012 { 1013 return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_PERIODS)->min; 1014 } 1015 1016 /** 1017 * params_buffer_size - Get the buffer size (in frames) from the hw params 1018 * @p: hw params 1019 * 1020 * Return: the buffer size in frames 1021 */ 1022 static inline unsigned int params_buffer_size(const struct snd_pcm_hw_params *p) 1023 { 1024 return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min; 1025 } 1026 1027 /** 1028 * params_buffer_bytes - Get the buffer size (in bytes) from the hw params 1029 * @p: hw params 1030 * 1031 * Return: the buffer size in bytes 1032 */ 1033 static inline unsigned int params_buffer_bytes(const struct snd_pcm_hw_params *p) 1034 { 1035 return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min; 1036 } 1037 1038 int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v); 1039 int snd_interval_list(struct snd_interval *i, unsigned int count, 1040 const unsigned int *list, unsigned int mask); 1041 int snd_interval_ranges(struct snd_interval *i, unsigned int count, 1042 const struct snd_interval *list, unsigned int mask); 1043 int snd_interval_ratnum(struct snd_interval *i, 1044 unsigned int rats_count, const struct snd_ratnum *rats, 1045 unsigned int *nump, unsigned int *denp); 1046 1047 void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params); 1048 void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var); 1049 1050 int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); 1051 1052 int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, 1053 u_int64_t mask); 1054 int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, 1055 unsigned int min, unsigned int max); 1056 int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var); 1057 int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, 1058 unsigned int cond, 1059 snd_pcm_hw_param_t var, 1060 const struct snd_pcm_hw_constraint_list *l); 1061 int snd_pcm_hw_constraint_ranges(struct snd_pcm_runtime *runtime, 1062 unsigned int cond, 1063 snd_pcm_hw_param_t var, 1064 const struct snd_pcm_hw_constraint_ranges *r); 1065 int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, 1066 unsigned int cond, 1067 snd_pcm_hw_param_t var, 1068 const struct snd_pcm_hw_constraint_ratnums *r); 1069 int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, 1070 unsigned int cond, 1071 snd_pcm_hw_param_t var, 1072 const struct snd_pcm_hw_constraint_ratdens *r); 1073 int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, 1074 unsigned int cond, 1075 unsigned int width, 1076 unsigned int msbits); 1077 int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, 1078 unsigned int cond, 1079 snd_pcm_hw_param_t var, 1080 unsigned long step); 1081 int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, 1082 unsigned int cond, 1083 snd_pcm_hw_param_t var); 1084 int snd_pcm_hw_rule_noresample(struct snd_pcm_runtime *runtime, 1085 unsigned int base_rate); 1086 int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, 1087 unsigned int cond, 1088 int var, 1089 snd_pcm_hw_rule_func_t func, void *private, 1090 int dep, ...); 1091 1092 /** 1093 * snd_pcm_hw_constraint_single() - Constrain parameter to a single value 1094 * @runtime: PCM runtime instance 1095 * @var: The hw_params variable to constrain 1096 * @val: The value to constrain to 1097 * 1098 * Return: Positive if the value is changed, zero if it's not changed, or a 1099 * negative error code. 1100 */ 1101 static inline int snd_pcm_hw_constraint_single( 1102 struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, 1103 unsigned int val) 1104 { 1105 return snd_pcm_hw_constraint_minmax(runtime, var, val, val); 1106 } 1107 1108 int snd_pcm_format_signed(snd_pcm_format_t format); 1109 int snd_pcm_format_unsigned(snd_pcm_format_t format); 1110 int snd_pcm_format_linear(snd_pcm_format_t format); 1111 int snd_pcm_format_little_endian(snd_pcm_format_t format); 1112 int snd_pcm_format_big_endian(snd_pcm_format_t format); 1113 #if 0 /* just for kernel-doc */ 1114 /** 1115 * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian 1116 * @format: the format to check 1117 * 1118 * Return: 1 if the given PCM format is CPU-endian, 0 if 1119 * opposite, or a negative error code if endian not specified. 1120 */ 1121 int snd_pcm_format_cpu_endian(snd_pcm_format_t format); 1122 #endif /* DocBook */ 1123 #ifdef SNDRV_LITTLE_ENDIAN 1124 #define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format) 1125 #else 1126 #define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format) 1127 #endif 1128 int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */ 1129 int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */ 1130 ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples); 1131 const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format); 1132 int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames); 1133 1134 void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, 1135 const struct snd_pcm_ops *ops); 1136 void snd_pcm_set_sync(struct snd_pcm_substream *substream); 1137 int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, 1138 unsigned int cmd, void *arg); 1139 void snd_pcm_period_elapsed_under_stream_lock(struct snd_pcm_substream *substream); 1140 void snd_pcm_period_elapsed(struct snd_pcm_substream *substream); 1141 snd_pcm_sframes_t __snd_pcm_lib_xfer(struct snd_pcm_substream *substream, 1142 void *buf, bool interleaved, 1143 snd_pcm_uframes_t frames, bool in_kernel); 1144 1145 static inline snd_pcm_sframes_t 1146 snd_pcm_lib_write(struct snd_pcm_substream *substream, 1147 const void __user *buf, snd_pcm_uframes_t frames) 1148 { 1149 return __snd_pcm_lib_xfer(substream, (void __force *)buf, true, frames, false); 1150 } 1151 1152 static inline snd_pcm_sframes_t 1153 snd_pcm_lib_read(struct snd_pcm_substream *substream, 1154 void __user *buf, snd_pcm_uframes_t frames) 1155 { 1156 return __snd_pcm_lib_xfer(substream, (void __force *)buf, true, frames, false); 1157 } 1158 1159 static inline snd_pcm_sframes_t 1160 snd_pcm_lib_writev(struct snd_pcm_substream *substream, 1161 void __user **bufs, snd_pcm_uframes_t frames) 1162 { 1163 return __snd_pcm_lib_xfer(substream, (void *)bufs, false, frames, false); 1164 } 1165 1166 static inline snd_pcm_sframes_t 1167 snd_pcm_lib_readv(struct snd_pcm_substream *substream, 1168 void __user **bufs, snd_pcm_uframes_t frames) 1169 { 1170 return __snd_pcm_lib_xfer(substream, (void *)bufs, false, frames, false); 1171 } 1172 1173 static inline snd_pcm_sframes_t 1174 snd_pcm_kernel_write(struct snd_pcm_substream *substream, 1175 const void *buf, snd_pcm_uframes_t frames) 1176 { 1177 return __snd_pcm_lib_xfer(substream, (void *)buf, true, frames, true); 1178 } 1179 1180 static inline snd_pcm_sframes_t 1181 snd_pcm_kernel_read(struct snd_pcm_substream *substream, 1182 void *buf, snd_pcm_uframes_t frames) 1183 { 1184 return __snd_pcm_lib_xfer(substream, buf, true, frames, true); 1185 } 1186 1187 static inline snd_pcm_sframes_t 1188 snd_pcm_kernel_writev(struct snd_pcm_substream *substream, 1189 void **bufs, snd_pcm_uframes_t frames) 1190 { 1191 return __snd_pcm_lib_xfer(substream, bufs, false, frames, true); 1192 } 1193 1194 static inline snd_pcm_sframes_t 1195 snd_pcm_kernel_readv(struct snd_pcm_substream *substream, 1196 void **bufs, snd_pcm_uframes_t frames) 1197 { 1198 return __snd_pcm_lib_xfer(substream, bufs, false, frames, true); 1199 } 1200 1201 int snd_pcm_hw_limit_rates(struct snd_pcm_hardware *hw); 1202 1203 static inline int 1204 snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime) 1205 { 1206 return snd_pcm_hw_limit_rates(&runtime->hw); 1207 } 1208 1209 unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate); 1210 unsigned int snd_pcm_rate_bit_to_rate(unsigned int rate_bit); 1211 unsigned int snd_pcm_rate_mask_intersect(unsigned int rates_a, 1212 unsigned int rates_b); 1213 unsigned int snd_pcm_rate_range_to_bits(unsigned int rate_min, 1214 unsigned int rate_max); 1215 1216 /** 1217 * snd_pcm_set_runtime_buffer - Set the PCM runtime buffer 1218 * @substream: PCM substream to set 1219 * @bufp: the buffer information, NULL to clear 1220 * 1221 * Copy the buffer information to runtime->dma_buffer when @bufp is non-NULL. 1222 * Otherwise it clears the current buffer information. 1223 */ 1224 static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream, 1225 struct snd_dma_buffer *bufp) 1226 { 1227 struct snd_pcm_runtime *runtime = substream->runtime; 1228 if (bufp) { 1229 runtime->dma_buffer_p = bufp; 1230 runtime->dma_area = bufp->area; 1231 runtime->dma_addr = bufp->addr; 1232 runtime->dma_bytes = bufp->bytes; 1233 } else { 1234 runtime->dma_buffer_p = NULL; 1235 runtime->dma_area = NULL; 1236 runtime->dma_addr = 0; 1237 runtime->dma_bytes = 0; 1238 } 1239 } 1240 1241 /** 1242 * snd_pcm_gettime - Fill the timespec64 depending on the timestamp mode 1243 * @runtime: PCM runtime instance 1244 * @tv: timespec64 to fill 1245 */ 1246 static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime, 1247 struct timespec64 *tv) 1248 { 1249 switch (runtime->tstamp_type) { 1250 case SNDRV_PCM_TSTAMP_TYPE_MONOTONIC: 1251 ktime_get_ts64(tv); 1252 break; 1253 case SNDRV_PCM_TSTAMP_TYPE_MONOTONIC_RAW: 1254 ktime_get_raw_ts64(tv); 1255 break; 1256 default: 1257 ktime_get_real_ts64(tv); 1258 break; 1259 } 1260 } 1261 1262 /* 1263 * Memory 1264 */ 1265 1266 void snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream); 1267 void snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm); 1268 void snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream, 1269 int type, struct device *data, 1270 size_t size, size_t max); 1271 void snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm, 1272 int type, void *data, 1273 size_t size, size_t max); 1274 int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size); 1275 int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream); 1276 1277 int snd_pcm_set_managed_buffer(struct snd_pcm_substream *substream, int type, 1278 struct device *data, size_t size, size_t max); 1279 int snd_pcm_set_managed_buffer_all(struct snd_pcm *pcm, int type, 1280 struct device *data, 1281 size_t size, size_t max); 1282 1283 /** 1284 * snd_pcm_set_fixed_buffer - Preallocate and set up the fixed size PCM buffer 1285 * @substream: the pcm substream instance 1286 * @type: DMA type (SNDRV_DMA_TYPE_*) 1287 * @data: DMA type dependent data 1288 * @size: the requested pre-allocation size in bytes 1289 * 1290 * This is a variant of snd_pcm_set_managed_buffer(), but this pre-allocates 1291 * only the given sized buffer and doesn't allow re-allocation nor dynamic 1292 * allocation of a larger buffer unlike the standard one. 1293 * The function may return -ENOMEM error, hence the caller must check it. 1294 * 1295 * Return: zero if successful, or a negative error code 1296 */ 1297 static inline int __must_check 1298 snd_pcm_set_fixed_buffer(struct snd_pcm_substream *substream, int type, 1299 struct device *data, size_t size) 1300 { 1301 return snd_pcm_set_managed_buffer(substream, type, data, size, 0); 1302 } 1303 1304 /** 1305 * snd_pcm_set_fixed_buffer_all - Preallocate and set up the fixed size PCM buffer 1306 * @pcm: the pcm instance 1307 * @type: DMA type (SNDRV_DMA_TYPE_*) 1308 * @data: DMA type dependent data 1309 * @size: the requested pre-allocation size in bytes 1310 * 1311 * Apply the set up of the fixed buffer via snd_pcm_set_fixed_buffer() for 1312 * all substream. If any of allocation fails, it returns -ENOMEM, hence the 1313 * caller must check the return value. 1314 * 1315 * Return: zero if successful, or a negative error code 1316 */ 1317 static inline int __must_check 1318 snd_pcm_set_fixed_buffer_all(struct snd_pcm *pcm, int type, 1319 struct device *data, size_t size) 1320 { 1321 return snd_pcm_set_managed_buffer_all(pcm, type, data, size, 0); 1322 } 1323 1324 int _snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream *substream, 1325 size_t size, gfp_t gfp_flags); 1326 int snd_pcm_lib_free_vmalloc_buffer(struct snd_pcm_substream *substream); 1327 struct page *snd_pcm_lib_get_vmalloc_page(struct snd_pcm_substream *substream, 1328 unsigned long offset); 1329 /** 1330 * snd_pcm_lib_alloc_vmalloc_buffer - allocate virtual DMA buffer 1331 * @substream: the substream to allocate the buffer to 1332 * @size: the requested buffer size, in bytes 1333 * 1334 * Allocates the PCM substream buffer using vmalloc(), i.e., the memory is 1335 * contiguous in kernel virtual space, but not in physical memory. Use this 1336 * if the buffer is accessed by kernel code but not by device DMA. 1337 * 1338 * Return: 1 if the buffer was changed, 0 if not changed, or a negative error 1339 * code. 1340 */ 1341 static inline int snd_pcm_lib_alloc_vmalloc_buffer 1342 (struct snd_pcm_substream *substream, size_t size) 1343 { 1344 return _snd_pcm_lib_alloc_vmalloc_buffer(substream, size, 1345 GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO); 1346 } 1347 1348 /** 1349 * snd_pcm_lib_alloc_vmalloc_32_buffer - allocate 32-bit-addressable buffer 1350 * @substream: the substream to allocate the buffer to 1351 * @size: the requested buffer size, in bytes 1352 * 1353 * This function works like snd_pcm_lib_alloc_vmalloc_buffer(), but uses 1354 * vmalloc_32(), i.e., the pages are allocated from 32-bit-addressable memory. 1355 * 1356 * Return: 1 if the buffer was changed, 0 if not changed, or a negative error 1357 * code. 1358 */ 1359 static inline int snd_pcm_lib_alloc_vmalloc_32_buffer 1360 (struct snd_pcm_substream *substream, size_t size) 1361 { 1362 return _snd_pcm_lib_alloc_vmalloc_buffer(substream, size, 1363 GFP_KERNEL | GFP_DMA32 | __GFP_ZERO); 1364 } 1365 1366 #define snd_pcm_get_dma_buf(substream) ((substream)->runtime->dma_buffer_p) 1367 1368 /** 1369 * snd_pcm_sgbuf_get_addr - Get the DMA address at the corresponding offset 1370 * @substream: PCM substream 1371 * @ofs: byte offset 1372 * 1373 * Return: DMA address 1374 */ 1375 static inline dma_addr_t 1376 snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs) 1377 { 1378 return snd_sgbuf_get_addr(snd_pcm_get_dma_buf(substream), ofs); 1379 } 1380 1381 /** 1382 * snd_pcm_sgbuf_get_chunk_size - Compute the max size that fits within the 1383 * contig. page from the given size 1384 * @substream: PCM substream 1385 * @ofs: byte offset 1386 * @size: byte size to examine 1387 * 1388 * Return: chunk size 1389 */ 1390 static inline unsigned int 1391 snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream, 1392 unsigned int ofs, unsigned int size) 1393 { 1394 return snd_sgbuf_get_chunk_size(snd_pcm_get_dma_buf(substream), ofs, size); 1395 } 1396 1397 /** 1398 * snd_pcm_mmap_data_open - increase the mmap counter 1399 * @area: VMA 1400 * 1401 * PCM mmap callback should handle this counter properly 1402 */ 1403 static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area) 1404 { 1405 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; 1406 atomic_inc(&substream->mmap_count); 1407 } 1408 1409 /** 1410 * snd_pcm_mmap_data_close - decrease the mmap counter 1411 * @area: VMA 1412 * 1413 * PCM mmap callback should handle this counter properly 1414 */ 1415 static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area) 1416 { 1417 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; 1418 atomic_dec(&substream->mmap_count); 1419 } 1420 1421 int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream, 1422 struct vm_area_struct *area); 1423 /* mmap for io-memory area */ 1424 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) 1425 #define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP 1426 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area); 1427 #else 1428 #define SNDRV_PCM_INFO_MMAP_IOMEM 0 1429 #define snd_pcm_lib_mmap_iomem NULL 1430 #endif 1431 1432 /** 1433 * snd_pcm_limit_isa_dma_size - Get the max size fitting with ISA DMA transfer 1434 * @dma: DMA number 1435 * @max: pointer to store the max size 1436 */ 1437 static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max) 1438 { 1439 *max = dma < 4 ? 64 * 1024 : 128 * 1024; 1440 } 1441 1442 /* 1443 * Misc 1444 */ 1445 1446 #define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\ 1447 (IEC958_AES1_CON_ORIGINAL<<8)|\ 1448 (IEC958_AES1_CON_PCM_CODER<<8)|\ 1449 (IEC958_AES3_CON_FS_48000<<24)) 1450 1451 const char *snd_pcm_format_name(snd_pcm_format_t format); 1452 1453 /** 1454 * snd_pcm_direction_name - Get a string naming the direction of a stream 1455 * @direction: Stream's direction, one of SNDRV_PCM_STREAM_XXX 1456 * 1457 * Returns a string naming the direction of the stream. 1458 */ 1459 static inline const char *snd_pcm_direction_name(int direction) 1460 { 1461 if (direction == SNDRV_PCM_STREAM_PLAYBACK) 1462 return "Playback"; 1463 else 1464 return "Capture"; 1465 } 1466 1467 /** 1468 * snd_pcm_stream_str - Get a string naming the direction of a stream 1469 * @substream: the pcm substream instance 1470 * 1471 * Return: A string naming the direction of the stream. 1472 */ 1473 static inline const char *snd_pcm_stream_str(struct snd_pcm_substream *substream) 1474 { 1475 return snd_pcm_direction_name(substream->stream); 1476 } 1477 1478 /* 1479 * PCM channel-mapping control API 1480 */ 1481 /* array element of channel maps */ 1482 struct snd_pcm_chmap_elem { 1483 unsigned char channels; 1484 unsigned char map[15]; 1485 }; 1486 1487 /* channel map information; retrieved via snd_kcontrol_chip() */ 1488 struct snd_pcm_chmap { 1489 struct snd_pcm *pcm; /* assigned PCM instance */ 1490 int stream; /* PLAYBACK or CAPTURE */ 1491 struct snd_kcontrol *kctl; 1492 const struct snd_pcm_chmap_elem *chmap; 1493 unsigned int max_channels; 1494 unsigned int channel_mask; /* optional: active channels bitmask */ 1495 void *private_data; /* optional: private data pointer */ 1496 }; 1497 1498 /** 1499 * snd_pcm_chmap_substream - get the PCM substream assigned to the given chmap info 1500 * @info: chmap information 1501 * @idx: the substream number index 1502 * 1503 * Return: the matched PCM substream, or NULL if not found 1504 */ 1505 static inline struct snd_pcm_substream * 1506 snd_pcm_chmap_substream(struct snd_pcm_chmap *info, unsigned int idx) 1507 { 1508 struct snd_pcm_substream *s; 1509 for (s = info->pcm->streams[info->stream].substream; s; s = s->next) 1510 if (s->number == idx) 1511 return s; 1512 return NULL; 1513 } 1514 1515 /* ALSA-standard channel maps (RL/RR prior to C/LFE) */ 1516 extern const struct snd_pcm_chmap_elem snd_pcm_std_chmaps[]; 1517 /* Other world's standard channel maps (C/LFE prior to RL/RR) */ 1518 extern const struct snd_pcm_chmap_elem snd_pcm_alt_chmaps[]; 1519 1520 /* bit masks to be passed to snd_pcm_chmap.channel_mask field */ 1521 #define SND_PCM_CHMAP_MASK_24 ((1U << 2) | (1U << 4)) 1522 #define SND_PCM_CHMAP_MASK_246 (SND_PCM_CHMAP_MASK_24 | (1U << 6)) 1523 #define SND_PCM_CHMAP_MASK_2468 (SND_PCM_CHMAP_MASK_246 | (1U << 8)) 1524 1525 int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream, 1526 const struct snd_pcm_chmap_elem *chmap, 1527 int max_channels, 1528 unsigned long private_value, 1529 struct snd_pcm_chmap **info_ret); 1530 1531 /** 1532 * pcm_format_to_bits - Strong-typed conversion of pcm_format to bitwise 1533 * @pcm_format: PCM format 1534 * 1535 * Return: 64bit mask corresponding to the given PCM format 1536 */ 1537 static inline u64 pcm_format_to_bits(snd_pcm_format_t pcm_format) 1538 { 1539 return 1ULL << (__force int) pcm_format; 1540 } 1541 1542 /** 1543 * pcm_for_each_format - helper to iterate for each format type 1544 * @f: the iterator variable in snd_pcm_format_t type 1545 */ 1546 #define pcm_for_each_format(f) \ 1547 for ((f) = SNDRV_PCM_FORMAT_FIRST; \ 1548 (__force int)(f) <= (__force int)SNDRV_PCM_FORMAT_LAST; \ 1549 (f) = (__force snd_pcm_format_t)((__force int)(f) + 1)) 1550 1551 /* printk helpers */ 1552 #define pcm_err(pcm, fmt, args...) \ 1553 dev_err((pcm)->card->dev, fmt, ##args) 1554 #define pcm_warn(pcm, fmt, args...) \ 1555 dev_warn((pcm)->card->dev, fmt, ##args) 1556 #define pcm_dbg(pcm, fmt, args...) \ 1557 dev_dbg((pcm)->card->dev, fmt, ##args) 1558 1559 struct snd_pcm_status64 { 1560 snd_pcm_state_t state; /* stream state */ 1561 u8 rsvd[4]; 1562 s64 trigger_tstamp_sec; /* time when stream was started/stopped/paused */ 1563 s64 trigger_tstamp_nsec; 1564 s64 tstamp_sec; /* reference timestamp */ 1565 s64 tstamp_nsec; 1566 snd_pcm_uframes_t appl_ptr; /* appl ptr */ 1567 snd_pcm_uframes_t hw_ptr; /* hw ptr */ 1568 snd_pcm_sframes_t delay; /* current delay in frames */ 1569 snd_pcm_uframes_t avail; /* number of frames available */ 1570 snd_pcm_uframes_t avail_max; /* max frames available on hw since last status */ 1571 snd_pcm_uframes_t overrange; /* count of ADC (capture) overrange detections from last status */ 1572 snd_pcm_state_t suspended_state; /* suspended stream state */ 1573 __u32 audio_tstamp_data; /* needed for 64-bit alignment, used for configs/report to/from userspace */ 1574 s64 audio_tstamp_sec; /* sample counter, wall clock, PHC or on-demand sync'ed */ 1575 s64 audio_tstamp_nsec; 1576 s64 driver_tstamp_sec; /* useful in case reference system tstamp is reported with delay */ 1577 s64 driver_tstamp_nsec; 1578 __u32 audio_tstamp_accuracy; /* in ns units, only valid if indicated in audio_tstamp_data */ 1579 unsigned char reserved[52-4*sizeof(s64)]; /* must be filled with zero */ 1580 }; 1581 1582 #define SNDRV_PCM_IOCTL_STATUS64 _IOR('A', 0x20, struct snd_pcm_status64) 1583 #define SNDRV_PCM_IOCTL_STATUS_EXT64 _IOWR('A', 0x24, struct snd_pcm_status64) 1584 1585 struct snd_pcm_status32 { 1586 snd_pcm_state_t state; /* stream state */ 1587 s32 trigger_tstamp_sec; /* time when stream was started/stopped/paused */ 1588 s32 trigger_tstamp_nsec; 1589 s32 tstamp_sec; /* reference timestamp */ 1590 s32 tstamp_nsec; 1591 u32 appl_ptr; /* appl ptr */ 1592 u32 hw_ptr; /* hw ptr */ 1593 s32 delay; /* current delay in frames */ 1594 u32 avail; /* number of frames available */ 1595 u32 avail_max; /* max frames available on hw since last status */ 1596 u32 overrange; /* count of ADC (capture) overrange detections from last status */ 1597 snd_pcm_state_t suspended_state; /* suspended stream state */ 1598 u32 audio_tstamp_data; /* needed for 64-bit alignment, used for configs/report to/from userspace */ 1599 s32 audio_tstamp_sec; /* sample counter, wall clock, PHC or on-demand sync'ed */ 1600 s32 audio_tstamp_nsec; 1601 s32 driver_tstamp_sec; /* useful in case reference system tstamp is reported with delay */ 1602 s32 driver_tstamp_nsec; 1603 u32 audio_tstamp_accuracy; /* in ns units, only valid if indicated in audio_tstamp_data */ 1604 unsigned char reserved[52-4*sizeof(s32)]; /* must be filled with zero */ 1605 }; 1606 1607 #define SNDRV_PCM_IOCTL_STATUS32 _IOR('A', 0x20, struct snd_pcm_status32) 1608 #define SNDRV_PCM_IOCTL_STATUS_EXT32 _IOWR('A', 0x24, struct snd_pcm_status32) 1609 1610 #endif /* __SOUND_PCM_H */ 1611