1 #ifndef __SOUND_PCM_H 2 #define __SOUND_PCM_H 3 4 /* 5 * Digital Audio (PCM) abstract layer 6 * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 7 * Abramo Bagnara <abramo@alsa-project.org> 8 * 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or 13 * (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 23 * 24 */ 25 26 #include <sound/asound.h> 27 #include <sound/memalloc.h> 28 #include <sound/minors.h> 29 #include <linux/poll.h> 30 #include <linux/mm.h> 31 #include <linux/bitops.h> 32 #include <linux/pm_qos_params.h> 33 34 #define snd_pcm_substream_chip(substream) ((substream)->private_data) 35 #define snd_pcm_chip(pcm) ((pcm)->private_data) 36 37 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 38 #include "pcm_oss.h" 39 #endif 40 41 /* 42 * Hardware (lowlevel) section 43 */ 44 45 struct snd_pcm_hardware { 46 unsigned int info; /* SNDRV_PCM_INFO_* */ 47 u64 formats; /* SNDRV_PCM_FMTBIT_* */ 48 unsigned int rates; /* SNDRV_PCM_RATE_* */ 49 unsigned int rate_min; /* min rate */ 50 unsigned int rate_max; /* max rate */ 51 unsigned int channels_min; /* min channels */ 52 unsigned int channels_max; /* max channels */ 53 size_t buffer_bytes_max; /* max buffer size */ 54 size_t period_bytes_min; /* min period size */ 55 size_t period_bytes_max; /* max period size */ 56 unsigned int periods_min; /* min # of periods */ 57 unsigned int periods_max; /* max # of periods */ 58 size_t fifo_size; /* fifo size in bytes */ 59 }; 60 61 struct snd_pcm_substream; 62 63 struct snd_pcm_ops { 64 int (*open)(struct snd_pcm_substream *substream); 65 int (*close)(struct snd_pcm_substream *substream); 66 int (*ioctl)(struct snd_pcm_substream * substream, 67 unsigned int cmd, void *arg); 68 int (*hw_params)(struct snd_pcm_substream *substream, 69 struct snd_pcm_hw_params *params); 70 int (*hw_free)(struct snd_pcm_substream *substream); 71 int (*prepare)(struct snd_pcm_substream *substream); 72 int (*trigger)(struct snd_pcm_substream *substream, int cmd); 73 snd_pcm_uframes_t (*pointer)(struct snd_pcm_substream *substream); 74 int (*copy)(struct snd_pcm_substream *substream, int channel, 75 snd_pcm_uframes_t pos, 76 void __user *buf, snd_pcm_uframes_t count); 77 int (*silence)(struct snd_pcm_substream *substream, int channel, 78 snd_pcm_uframes_t pos, snd_pcm_uframes_t count); 79 struct page *(*page)(struct snd_pcm_substream *substream, 80 unsigned long offset); 81 int (*mmap)(struct snd_pcm_substream *substream, struct vm_area_struct *vma); 82 int (*ack)(struct snd_pcm_substream *substream); 83 }; 84 85 /* 86 * 87 */ 88 89 #if defined(CONFIG_SND_DYNAMIC_MINORS) 90 #define SNDRV_PCM_DEVICES (SNDRV_OS_MINORS-2) 91 #else 92 #define SNDRV_PCM_DEVICES 8 93 #endif 94 95 #define SNDRV_PCM_IOCTL1_FALSE ((void *)0) 96 #define SNDRV_PCM_IOCTL1_TRUE ((void *)1) 97 98 #define SNDRV_PCM_IOCTL1_RESET 0 99 #define SNDRV_PCM_IOCTL1_INFO 1 100 #define SNDRV_PCM_IOCTL1_CHANNEL_INFO 2 101 #define SNDRV_PCM_IOCTL1_GSTATE 3 102 #define SNDRV_PCM_IOCTL1_FIFO_SIZE 4 103 104 #define SNDRV_PCM_TRIGGER_STOP 0 105 #define SNDRV_PCM_TRIGGER_START 1 106 #define SNDRV_PCM_TRIGGER_PAUSE_PUSH 3 107 #define SNDRV_PCM_TRIGGER_PAUSE_RELEASE 4 108 #define SNDRV_PCM_TRIGGER_SUSPEND 5 109 #define SNDRV_PCM_TRIGGER_RESUME 6 110 111 #define SNDRV_PCM_POS_XRUN ((snd_pcm_uframes_t)-1) 112 113 /* If you change this don't forget to change rates[] table in pcm_native.c */ 114 #define SNDRV_PCM_RATE_5512 (1<<0) /* 5512Hz */ 115 #define SNDRV_PCM_RATE_8000 (1<<1) /* 8000Hz */ 116 #define SNDRV_PCM_RATE_11025 (1<<2) /* 11025Hz */ 117 #define SNDRV_PCM_RATE_16000 (1<<3) /* 16000Hz */ 118 #define SNDRV_PCM_RATE_22050 (1<<4) /* 22050Hz */ 119 #define SNDRV_PCM_RATE_32000 (1<<5) /* 32000Hz */ 120 #define SNDRV_PCM_RATE_44100 (1<<6) /* 44100Hz */ 121 #define SNDRV_PCM_RATE_48000 (1<<7) /* 48000Hz */ 122 #define SNDRV_PCM_RATE_64000 (1<<8) /* 64000Hz */ 123 #define SNDRV_PCM_RATE_88200 (1<<9) /* 88200Hz */ 124 #define SNDRV_PCM_RATE_96000 (1<<10) /* 96000Hz */ 125 #define SNDRV_PCM_RATE_176400 (1<<11) /* 176400Hz */ 126 #define SNDRV_PCM_RATE_192000 (1<<12) /* 192000Hz */ 127 128 #define SNDRV_PCM_RATE_CONTINUOUS (1<<30) /* continuous range */ 129 #define SNDRV_PCM_RATE_KNOT (1<<31) /* supports more non-continuos rates */ 130 131 #define SNDRV_PCM_RATE_8000_44100 (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|\ 132 SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|\ 133 SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100) 134 #define SNDRV_PCM_RATE_8000_48000 (SNDRV_PCM_RATE_8000_44100|SNDRV_PCM_RATE_48000) 135 #define SNDRV_PCM_RATE_8000_96000 (SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_64000|\ 136 SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000) 137 #define SNDRV_PCM_RATE_8000_192000 (SNDRV_PCM_RATE_8000_96000|SNDRV_PCM_RATE_176400|\ 138 SNDRV_PCM_RATE_192000) 139 #define SNDRV_PCM_FMTBIT_S8 (1ULL << SNDRV_PCM_FORMAT_S8) 140 #define SNDRV_PCM_FMTBIT_U8 (1ULL << SNDRV_PCM_FORMAT_U8) 141 #define SNDRV_PCM_FMTBIT_S16_LE (1ULL << SNDRV_PCM_FORMAT_S16_LE) 142 #define SNDRV_PCM_FMTBIT_S16_BE (1ULL << SNDRV_PCM_FORMAT_S16_BE) 143 #define SNDRV_PCM_FMTBIT_U16_LE (1ULL << SNDRV_PCM_FORMAT_U16_LE) 144 #define SNDRV_PCM_FMTBIT_U16_BE (1ULL << SNDRV_PCM_FORMAT_U16_BE) 145 #define SNDRV_PCM_FMTBIT_S24_LE (1ULL << SNDRV_PCM_FORMAT_S24_LE) 146 #define SNDRV_PCM_FMTBIT_S24_BE (1ULL << SNDRV_PCM_FORMAT_S24_BE) 147 #define SNDRV_PCM_FMTBIT_U24_LE (1ULL << SNDRV_PCM_FORMAT_U24_LE) 148 #define SNDRV_PCM_FMTBIT_U24_BE (1ULL << SNDRV_PCM_FORMAT_U24_BE) 149 #define SNDRV_PCM_FMTBIT_S32_LE (1ULL << SNDRV_PCM_FORMAT_S32_LE) 150 #define SNDRV_PCM_FMTBIT_S32_BE (1ULL << SNDRV_PCM_FORMAT_S32_BE) 151 #define SNDRV_PCM_FMTBIT_U32_LE (1ULL << SNDRV_PCM_FORMAT_U32_LE) 152 #define SNDRV_PCM_FMTBIT_U32_BE (1ULL << SNDRV_PCM_FORMAT_U32_BE) 153 #define SNDRV_PCM_FMTBIT_FLOAT_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT_LE) 154 #define SNDRV_PCM_FMTBIT_FLOAT_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT_BE) 155 #define SNDRV_PCM_FMTBIT_FLOAT64_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_LE) 156 #define SNDRV_PCM_FMTBIT_FLOAT64_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_BE) 157 #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE) 158 #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE) 159 #define SNDRV_PCM_FMTBIT_MU_LAW (1ULL << SNDRV_PCM_FORMAT_MU_LAW) 160 #define SNDRV_PCM_FMTBIT_A_LAW (1ULL << SNDRV_PCM_FORMAT_A_LAW) 161 #define SNDRV_PCM_FMTBIT_IMA_ADPCM (1ULL << SNDRV_PCM_FORMAT_IMA_ADPCM) 162 #define SNDRV_PCM_FMTBIT_MPEG (1ULL << SNDRV_PCM_FORMAT_MPEG) 163 #define SNDRV_PCM_FMTBIT_GSM (1ULL << SNDRV_PCM_FORMAT_GSM) 164 #define SNDRV_PCM_FMTBIT_SPECIAL (1ULL << SNDRV_PCM_FORMAT_SPECIAL) 165 #define SNDRV_PCM_FMTBIT_S24_3LE (1ULL << SNDRV_PCM_FORMAT_S24_3LE) 166 #define SNDRV_PCM_FMTBIT_U24_3LE (1ULL << SNDRV_PCM_FORMAT_U24_3LE) 167 #define SNDRV_PCM_FMTBIT_S24_3BE (1ULL << SNDRV_PCM_FORMAT_S24_3BE) 168 #define SNDRV_PCM_FMTBIT_U24_3BE (1ULL << SNDRV_PCM_FORMAT_U24_3BE) 169 #define SNDRV_PCM_FMTBIT_S20_3LE (1ULL << SNDRV_PCM_FORMAT_S20_3LE) 170 #define SNDRV_PCM_FMTBIT_U20_3LE (1ULL << SNDRV_PCM_FORMAT_U20_3LE) 171 #define SNDRV_PCM_FMTBIT_S20_3BE (1ULL << SNDRV_PCM_FORMAT_S20_3BE) 172 #define SNDRV_PCM_FMTBIT_U20_3BE (1ULL << SNDRV_PCM_FORMAT_U20_3BE) 173 #define SNDRV_PCM_FMTBIT_S18_3LE (1ULL << SNDRV_PCM_FORMAT_S18_3LE) 174 #define SNDRV_PCM_FMTBIT_U18_3LE (1ULL << SNDRV_PCM_FORMAT_U18_3LE) 175 #define SNDRV_PCM_FMTBIT_S18_3BE (1ULL << SNDRV_PCM_FORMAT_S18_3BE) 176 #define SNDRV_PCM_FMTBIT_U18_3BE (1ULL << SNDRV_PCM_FORMAT_U18_3BE) 177 178 #ifdef SNDRV_LITTLE_ENDIAN 179 #define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_LE 180 #define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_LE 181 #define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_LE 182 #define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_LE 183 #define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_LE 184 #define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_LE 185 #define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_LE 186 #define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_LE 187 #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE 188 #endif 189 #ifdef SNDRV_BIG_ENDIAN 190 #define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_BE 191 #define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_BE 192 #define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_BE 193 #define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_BE 194 #define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_BE 195 #define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_BE 196 #define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_BE 197 #define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_BE 198 #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE 199 #endif 200 201 struct snd_pcm_file { 202 struct snd_pcm_substream *substream; 203 int no_compat_mmap; 204 }; 205 206 struct snd_pcm_hw_rule; 207 typedef int (*snd_pcm_hw_rule_func_t)(struct snd_pcm_hw_params *params, 208 struct snd_pcm_hw_rule *rule); 209 210 struct snd_pcm_hw_rule { 211 unsigned int cond; 212 snd_pcm_hw_rule_func_t func; 213 int var; 214 int deps[4]; 215 void *private; 216 }; 217 218 struct snd_pcm_hw_constraints { 219 struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - 220 SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; 221 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - 222 SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1]; 223 unsigned int rules_num; 224 unsigned int rules_all; 225 struct snd_pcm_hw_rule *rules; 226 }; 227 228 static inline struct snd_mask *constrs_mask(struct snd_pcm_hw_constraints *constrs, 229 snd_pcm_hw_param_t var) 230 { 231 return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; 232 } 233 234 static inline struct snd_interval *constrs_interval(struct snd_pcm_hw_constraints *constrs, 235 snd_pcm_hw_param_t var) 236 { 237 return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; 238 } 239 240 struct snd_ratnum { 241 unsigned int num; 242 unsigned int den_min, den_max, den_step; 243 }; 244 245 struct snd_ratden { 246 unsigned int num_min, num_max, num_step; 247 unsigned int den; 248 }; 249 250 struct snd_pcm_hw_constraint_ratnums { 251 int nrats; 252 struct snd_ratnum *rats; 253 }; 254 255 struct snd_pcm_hw_constraint_ratdens { 256 int nrats; 257 struct snd_ratden *rats; 258 }; 259 260 struct snd_pcm_hw_constraint_list { 261 unsigned int count; 262 unsigned int *list; 263 unsigned int mask; 264 }; 265 266 struct snd_pcm_hwptr_log; 267 268 struct snd_pcm_runtime { 269 /* -- Status -- */ 270 struct snd_pcm_substream *trigger_master; 271 struct timespec trigger_tstamp; /* trigger timestamp */ 272 int overrange; 273 snd_pcm_uframes_t avail_max; 274 snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */ 275 snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time */ 276 unsigned long hw_ptr_jiffies; /* Time when hw_ptr is updated */ 277 snd_pcm_sframes_t delay; /* extra delay; typically FIFO size */ 278 279 /* -- HW params -- */ 280 snd_pcm_access_t access; /* access mode */ 281 snd_pcm_format_t format; /* SNDRV_PCM_FORMAT_* */ 282 snd_pcm_subformat_t subformat; /* subformat */ 283 unsigned int rate; /* rate in Hz */ 284 unsigned int channels; /* channels */ 285 snd_pcm_uframes_t period_size; /* period size */ 286 unsigned int periods; /* periods */ 287 snd_pcm_uframes_t buffer_size; /* buffer size */ 288 snd_pcm_uframes_t min_align; /* Min alignment for the format */ 289 size_t byte_align; 290 unsigned int frame_bits; 291 unsigned int sample_bits; 292 unsigned int info; 293 unsigned int rate_num; 294 unsigned int rate_den; 295 296 /* -- SW params -- */ 297 int tstamp_mode; /* mmap timestamp is updated */ 298 unsigned int period_step; 299 snd_pcm_uframes_t start_threshold; 300 snd_pcm_uframes_t stop_threshold; 301 snd_pcm_uframes_t silence_threshold; /* Silence filling happens when 302 noise is nearest than this */ 303 snd_pcm_uframes_t silence_size; /* Silence filling size */ 304 snd_pcm_uframes_t boundary; /* pointers wrap point */ 305 306 snd_pcm_uframes_t silence_start; /* starting pointer to silence area */ 307 snd_pcm_uframes_t silence_filled; /* size filled with silence */ 308 309 union snd_pcm_sync_id sync; /* hardware synchronization ID */ 310 311 /* -- mmap -- */ 312 struct snd_pcm_mmap_status *status; 313 struct snd_pcm_mmap_control *control; 314 315 /* -- locking / scheduling -- */ 316 unsigned int twake: 1; /* do transfer (!poll) wakeup */ 317 wait_queue_head_t sleep; /* poll sleep */ 318 wait_queue_head_t tsleep; /* transfer sleep */ 319 struct fasync_struct *fasync; 320 321 /* -- private section -- */ 322 void *private_data; 323 void (*private_free)(struct snd_pcm_runtime *runtime); 324 325 /* -- hardware description -- */ 326 struct snd_pcm_hardware hw; 327 struct snd_pcm_hw_constraints hw_constraints; 328 329 /* -- interrupt callbacks -- */ 330 void (*transfer_ack_begin)(struct snd_pcm_substream *substream); 331 void (*transfer_ack_end)(struct snd_pcm_substream *substream); 332 333 /* -- timer -- */ 334 unsigned int timer_resolution; /* timer resolution */ 335 int tstamp_type; /* timestamp type */ 336 337 /* -- DMA -- */ 338 unsigned char *dma_area; /* DMA area */ 339 dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */ 340 size_t dma_bytes; /* size of DMA area */ 341 342 struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */ 343 344 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 345 /* -- OSS things -- */ 346 struct snd_pcm_oss_runtime oss; 347 #endif 348 349 #ifdef CONFIG_SND_PCM_XRUN_DEBUG 350 struct snd_pcm_hwptr_log *hwptr_log; 351 #endif 352 }; 353 354 struct snd_pcm_group { /* keep linked substreams */ 355 spinlock_t lock; 356 struct list_head substreams; 357 int count; 358 }; 359 360 struct pid; 361 362 struct snd_pcm_substream { 363 struct snd_pcm *pcm; 364 struct snd_pcm_str *pstr; 365 void *private_data; /* copied from pcm->private_data */ 366 int number; 367 char name[32]; /* substream name */ 368 int stream; /* stream (direction) */ 369 struct pm_qos_request_list *latency_pm_qos_req; /* pm_qos request */ 370 size_t buffer_bytes_max; /* limit ring buffer size */ 371 struct snd_dma_buffer dma_buffer; 372 unsigned int dma_buf_id; 373 size_t dma_max; 374 /* -- hardware operations -- */ 375 struct snd_pcm_ops *ops; 376 /* -- runtime information -- */ 377 struct snd_pcm_runtime *runtime; 378 /* -- timer section -- */ 379 struct snd_timer *timer; /* timer */ 380 unsigned timer_running: 1; /* time is running */ 381 /* -- next substream -- */ 382 struct snd_pcm_substream *next; 383 /* -- linked substreams -- */ 384 struct list_head link_list; /* linked list member */ 385 struct snd_pcm_group self_group; /* fake group for non linked substream (with substream lock inside) */ 386 struct snd_pcm_group *group; /* pointer to current group */ 387 /* -- assigned files -- */ 388 void *file; 389 int ref_count; 390 atomic_t mmap_count; 391 unsigned int f_flags; 392 void (*pcm_release)(struct snd_pcm_substream *); 393 struct pid *pid; 394 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 395 /* -- OSS things -- */ 396 struct snd_pcm_oss_substream oss; 397 #endif 398 #ifdef CONFIG_SND_VERBOSE_PROCFS 399 struct snd_info_entry *proc_root; 400 struct snd_info_entry *proc_info_entry; 401 struct snd_info_entry *proc_hw_params_entry; 402 struct snd_info_entry *proc_sw_params_entry; 403 struct snd_info_entry *proc_status_entry; 404 struct snd_info_entry *proc_prealloc_entry; 405 struct snd_info_entry *proc_prealloc_max_entry; 406 #endif 407 /* misc flags */ 408 unsigned int hw_opened: 1; 409 }; 410 411 #define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0) 412 413 414 struct snd_pcm_str { 415 int stream; /* stream (direction) */ 416 struct snd_pcm *pcm; 417 /* -- substreams -- */ 418 unsigned int substream_count; 419 unsigned int substream_opened; 420 struct snd_pcm_substream *substream; 421 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 422 /* -- OSS things -- */ 423 struct snd_pcm_oss_stream oss; 424 #endif 425 #ifdef CONFIG_SND_VERBOSE_PROCFS 426 struct snd_info_entry *proc_root; 427 struct snd_info_entry *proc_info_entry; 428 #ifdef CONFIG_SND_PCM_XRUN_DEBUG 429 unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */ 430 struct snd_info_entry *proc_xrun_debug_entry; 431 #endif 432 #endif 433 }; 434 435 struct snd_pcm { 436 struct snd_card *card; 437 struct list_head list; 438 int device; /* device number */ 439 unsigned int info_flags; 440 unsigned short dev_class; 441 unsigned short dev_subclass; 442 char id[64]; 443 char name[80]; 444 struct snd_pcm_str streams[2]; 445 struct mutex open_mutex; 446 wait_queue_head_t open_wait; 447 void *private_data; 448 void (*private_free) (struct snd_pcm *pcm); 449 struct device *dev; /* actual hw device this belongs to */ 450 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 451 struct snd_pcm_oss oss; 452 #endif 453 }; 454 455 struct snd_pcm_notify { 456 int (*n_register) (struct snd_pcm * pcm); 457 int (*n_disconnect) (struct snd_pcm * pcm); 458 int (*n_unregister) (struct snd_pcm * pcm); 459 struct list_head list; 460 }; 461 462 /* 463 * Registering 464 */ 465 466 extern const struct file_operations snd_pcm_f_ops[2]; 467 468 int snd_pcm_new(struct snd_card *card, const char *id, int device, 469 int playback_count, int capture_count, 470 struct snd_pcm **rpcm); 471 int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count); 472 473 int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree); 474 475 /* 476 * Native I/O 477 */ 478 479 extern rwlock_t snd_pcm_link_rwlock; 480 481 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info); 482 int snd_pcm_info_user(struct snd_pcm_substream *substream, 483 struct snd_pcm_info __user *info); 484 int snd_pcm_status(struct snd_pcm_substream *substream, 485 struct snd_pcm_status *status); 486 int snd_pcm_start(struct snd_pcm_substream *substream); 487 int snd_pcm_stop(struct snd_pcm_substream *substream, int status); 488 int snd_pcm_drain_done(struct snd_pcm_substream *substream); 489 #ifdef CONFIG_PM 490 int snd_pcm_suspend(struct snd_pcm_substream *substream); 491 int snd_pcm_suspend_all(struct snd_pcm *pcm); 492 #endif 493 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg); 494 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file, 495 struct snd_pcm_substream **rsubstream); 496 void snd_pcm_release_substream(struct snd_pcm_substream *substream); 497 int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file, 498 struct snd_pcm_substream **rsubstream); 499 void snd_pcm_detach_substream(struct snd_pcm_substream *substream); 500 void snd_pcm_vma_notify_data(void *client, void *data); 501 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area); 502 503 /* 504 * PCM library 505 */ 506 507 static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream) 508 { 509 return substream->group != &substream->self_group; 510 } 511 512 static inline void snd_pcm_stream_lock(struct snd_pcm_substream *substream) 513 { 514 read_lock(&snd_pcm_link_rwlock); 515 spin_lock(&substream->self_group.lock); 516 } 517 518 static inline void snd_pcm_stream_unlock(struct snd_pcm_substream *substream) 519 { 520 spin_unlock(&substream->self_group.lock); 521 read_unlock(&snd_pcm_link_rwlock); 522 } 523 524 static inline void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream) 525 { 526 read_lock_irq(&snd_pcm_link_rwlock); 527 spin_lock(&substream->self_group.lock); 528 } 529 530 static inline void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream) 531 { 532 spin_unlock(&substream->self_group.lock); 533 read_unlock_irq(&snd_pcm_link_rwlock); 534 } 535 536 #define snd_pcm_stream_lock_irqsave(substream, flags) \ 537 do { \ 538 read_lock_irqsave(&snd_pcm_link_rwlock, (flags)); \ 539 spin_lock(&substream->self_group.lock); \ 540 } while (0) 541 542 #define snd_pcm_stream_unlock_irqrestore(substream, flags) \ 543 do { \ 544 spin_unlock(&substream->self_group.lock); \ 545 read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \ 546 } while (0) 547 548 #define snd_pcm_group_for_each_entry(s, substream) \ 549 list_for_each_entry(s, &substream->group->substreams, link_list) 550 551 static inline int snd_pcm_running(struct snd_pcm_substream *substream) 552 { 553 return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING || 554 (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING && 555 substream->stream == SNDRV_PCM_STREAM_PLAYBACK)); 556 } 557 558 static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size) 559 { 560 return size * 8 / runtime->sample_bits; 561 } 562 563 static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size) 564 { 565 return size * 8 / runtime->frame_bits; 566 } 567 568 static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size) 569 { 570 return size * runtime->sample_bits / 8; 571 } 572 573 static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size) 574 { 575 return size * runtime->frame_bits / 8; 576 } 577 578 static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes) 579 { 580 return bytes % runtime->byte_align == 0; 581 } 582 583 static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream) 584 { 585 struct snd_pcm_runtime *runtime = substream->runtime; 586 return frames_to_bytes(runtime, runtime->buffer_size); 587 } 588 589 static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream) 590 { 591 struct snd_pcm_runtime *runtime = substream->runtime; 592 return frames_to_bytes(runtime, runtime->period_size); 593 } 594 595 /* 596 * result is: 0 ... (boundary - 1) 597 */ 598 static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime) 599 { 600 snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr; 601 if (avail < 0) 602 avail += runtime->boundary; 603 else if ((snd_pcm_uframes_t) avail >= runtime->boundary) 604 avail -= runtime->boundary; 605 return avail; 606 } 607 608 /* 609 * result is: 0 ... (boundary - 1) 610 */ 611 static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime) 612 { 613 snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr; 614 if (avail < 0) 615 avail += runtime->boundary; 616 return avail; 617 } 618 619 static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime) 620 { 621 return runtime->buffer_size - snd_pcm_playback_avail(runtime); 622 } 623 624 static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime) 625 { 626 return runtime->buffer_size - snd_pcm_capture_avail(runtime); 627 } 628 629 /** 630 * snd_pcm_playback_ready - check whether the playback buffer is available 631 * @substream: the pcm substream instance 632 * 633 * Checks whether enough free space is available on the playback buffer. 634 * 635 * Returns non-zero if available, or zero if not. 636 */ 637 static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream) 638 { 639 struct snd_pcm_runtime *runtime = substream->runtime; 640 return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min; 641 } 642 643 /** 644 * snd_pcm_capture_ready - check whether the capture buffer is available 645 * @substream: the pcm substream instance 646 * 647 * Checks whether enough capture data is available on the capture buffer. 648 * 649 * Returns non-zero if available, or zero if not. 650 */ 651 static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream) 652 { 653 struct snd_pcm_runtime *runtime = substream->runtime; 654 return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min; 655 } 656 657 /** 658 * snd_pcm_playback_data - check whether any data exists on the playback buffer 659 * @substream: the pcm substream instance 660 * 661 * Checks whether any data exists on the playback buffer. If stop_threshold 662 * is bigger or equal to boundary, then this function returns always non-zero. 663 * 664 * Returns non-zero if exists, or zero if not. 665 */ 666 static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream) 667 { 668 struct snd_pcm_runtime *runtime = substream->runtime; 669 670 if (runtime->stop_threshold >= runtime->boundary) 671 return 1; 672 return snd_pcm_playback_avail(runtime) < runtime->buffer_size; 673 } 674 675 /** 676 * snd_pcm_playback_empty - check whether the playback buffer is empty 677 * @substream: the pcm substream instance 678 * 679 * Checks whether the playback buffer is empty. 680 * 681 * Returns non-zero if empty, or zero if not. 682 */ 683 static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream) 684 { 685 struct snd_pcm_runtime *runtime = substream->runtime; 686 return snd_pcm_playback_avail(runtime) >= runtime->buffer_size; 687 } 688 689 /** 690 * snd_pcm_capture_empty - check whether the capture buffer is empty 691 * @substream: the pcm substream instance 692 * 693 * Checks whether the capture buffer is empty. 694 * 695 * Returns non-zero if empty, or zero if not. 696 */ 697 static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream) 698 { 699 struct snd_pcm_runtime *runtime = substream->runtime; 700 return snd_pcm_capture_avail(runtime) == 0; 701 } 702 703 static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream, 704 struct snd_pcm_substream *master) 705 { 706 substream->runtime->trigger_master = master; 707 } 708 709 static inline int hw_is_mask(int var) 710 { 711 return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK && 712 var <= SNDRV_PCM_HW_PARAM_LAST_MASK; 713 } 714 715 static inline int hw_is_interval(int var) 716 { 717 return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL && 718 var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; 719 } 720 721 static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params, 722 snd_pcm_hw_param_t var) 723 { 724 return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; 725 } 726 727 static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params, 728 snd_pcm_hw_param_t var) 729 { 730 return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; 731 } 732 733 static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params, 734 snd_pcm_hw_param_t var) 735 { 736 return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; 737 } 738 739 static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params, 740 snd_pcm_hw_param_t var) 741 { 742 return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; 743 } 744 745 #define params_access(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_ACCESS)) 746 #define params_format(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_FORMAT)) 747 #define params_subformat(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_SUBFORMAT)) 748 #define params_channels(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min 749 #define params_rate(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_RATE)->min 750 #define params_period_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min 751 #define params_period_bytes(p) ((params_period_size(p)*snd_pcm_format_physical_width(params_format(p))*params_channels(p))/8) 752 #define params_periods(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIODS)->min 753 #define params_buffer_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min 754 #define params_buffer_bytes(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min 755 756 757 int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v); 758 void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); 759 void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); 760 void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, 761 unsigned int k, struct snd_interval *c); 762 void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, 763 const struct snd_interval *b, struct snd_interval *c); 764 int snd_interval_list(struct snd_interval *i, unsigned int count, unsigned int *list, unsigned int mask); 765 int snd_interval_ratnum(struct snd_interval *i, 766 unsigned int rats_count, struct snd_ratnum *rats, 767 unsigned int *nump, unsigned int *denp); 768 769 void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params); 770 void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var); 771 int snd_pcm_hw_params_choose(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); 772 773 int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); 774 775 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream); 776 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream); 777 778 int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, 779 u_int32_t mask); 780 int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, 781 u_int64_t mask); 782 int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, 783 unsigned int min, unsigned int max); 784 int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var); 785 int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, 786 unsigned int cond, 787 snd_pcm_hw_param_t var, 788 struct snd_pcm_hw_constraint_list *l); 789 int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, 790 unsigned int cond, 791 snd_pcm_hw_param_t var, 792 struct snd_pcm_hw_constraint_ratnums *r); 793 int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, 794 unsigned int cond, 795 snd_pcm_hw_param_t var, 796 struct snd_pcm_hw_constraint_ratdens *r); 797 int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, 798 unsigned int cond, 799 unsigned int width, 800 unsigned int msbits); 801 int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, 802 unsigned int cond, 803 snd_pcm_hw_param_t var, 804 unsigned long step); 805 int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, 806 unsigned int cond, 807 snd_pcm_hw_param_t var); 808 int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, 809 unsigned int cond, 810 int var, 811 snd_pcm_hw_rule_func_t func, void *private, 812 int dep, ...); 813 814 int snd_pcm_format_signed(snd_pcm_format_t format); 815 int snd_pcm_format_unsigned(snd_pcm_format_t format); 816 int snd_pcm_format_linear(snd_pcm_format_t format); 817 int snd_pcm_format_little_endian(snd_pcm_format_t format); 818 int snd_pcm_format_big_endian(snd_pcm_format_t format); 819 #if 0 /* just for DocBook */ 820 /** 821 * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian 822 * @format: the format to check 823 * 824 * Returns 1 if the given PCM format is CPU-endian, 0 if 825 * opposite, or a negative error code if endian not specified. 826 */ 827 int snd_pcm_format_cpu_endian(snd_pcm_format_t format); 828 #endif /* DocBook */ 829 #ifdef SNDRV_LITTLE_ENDIAN 830 #define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format) 831 #else 832 #define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format) 833 #endif 834 int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */ 835 int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */ 836 ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples); 837 const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format); 838 int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames); 839 snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian); 840 841 void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, struct snd_pcm_ops *ops); 842 void snd_pcm_set_sync(struct snd_pcm_substream *substream); 843 int snd_pcm_lib_interleave_len(struct snd_pcm_substream *substream); 844 int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, 845 unsigned int cmd, void *arg); 846 int snd_pcm_update_state(struct snd_pcm_substream *substream, 847 struct snd_pcm_runtime *runtime); 848 int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream); 849 int snd_pcm_playback_xrun_check(struct snd_pcm_substream *substream); 850 int snd_pcm_capture_xrun_check(struct snd_pcm_substream *substream); 851 int snd_pcm_playback_xrun_asap(struct snd_pcm_substream *substream); 852 int snd_pcm_capture_xrun_asap(struct snd_pcm_substream *substream); 853 void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr); 854 void snd_pcm_period_elapsed(struct snd_pcm_substream *substream); 855 snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, 856 const void __user *buf, 857 snd_pcm_uframes_t frames); 858 snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, 859 void __user *buf, snd_pcm_uframes_t frames); 860 snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, 861 void __user **bufs, snd_pcm_uframes_t frames); 862 snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, 863 void __user **bufs, snd_pcm_uframes_t frames); 864 865 extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates; 866 867 int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime); 868 unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate); 869 870 static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream, 871 struct snd_dma_buffer *bufp) 872 { 873 struct snd_pcm_runtime *runtime = substream->runtime; 874 if (bufp) { 875 runtime->dma_buffer_p = bufp; 876 runtime->dma_area = bufp->area; 877 runtime->dma_addr = bufp->addr; 878 runtime->dma_bytes = bufp->bytes; 879 } else { 880 runtime->dma_buffer_p = NULL; 881 runtime->dma_area = NULL; 882 runtime->dma_addr = 0; 883 runtime->dma_bytes = 0; 884 } 885 } 886 887 /* 888 * Timer interface 889 */ 890 891 void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream); 892 void snd_pcm_timer_init(struct snd_pcm_substream *substream); 893 void snd_pcm_timer_done(struct snd_pcm_substream *substream); 894 895 static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime, 896 struct timespec *tv) 897 { 898 if (runtime->tstamp_type == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC) 899 do_posix_clock_monotonic_gettime(tv); 900 else 901 getnstimeofday(tv); 902 } 903 904 /* 905 * Memory 906 */ 907 908 int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream); 909 int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm); 910 int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream, 911 int type, struct device *data, 912 size_t size, size_t max); 913 int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm, 914 int type, void *data, 915 size_t size, size_t max); 916 int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size); 917 int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream); 918 919 int _snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream *substream, 920 size_t size, gfp_t gfp_flags); 921 int snd_pcm_lib_free_vmalloc_buffer(struct snd_pcm_substream *substream); 922 struct page *snd_pcm_lib_get_vmalloc_page(struct snd_pcm_substream *substream, 923 unsigned long offset); 924 #if 0 /* for kernel-doc */ 925 /** 926 * snd_pcm_lib_alloc_vmalloc_buffer - allocate virtual DMA buffer 927 * @substream: the substream to allocate the buffer to 928 * @size: the requested buffer size, in bytes 929 * 930 * Allocates the PCM substream buffer using vmalloc(), i.e., the memory is 931 * contiguous in kernel virtual space, but not in physical memory. Use this 932 * if the buffer is accessed by kernel code but not by device DMA. 933 * 934 * Returns 1 if the buffer was changed, 0 if not changed, or a negative error 935 * code. 936 */ 937 static int snd_pcm_lib_alloc_vmalloc_buffer 938 (struct snd_pcm_substream *substream, size_t size); 939 /** 940 * snd_pcm_lib_alloc_vmalloc_32_buffer - allocate 32-bit-addressable buffer 941 * @substream: the substream to allocate the buffer to 942 * @size: the requested buffer size, in bytes 943 * 944 * This function works like snd_pcm_lib_alloc_vmalloc_buffer(), but uses 945 * vmalloc_32(), i.e., the pages are allocated from 32-bit-addressable memory. 946 */ 947 static int snd_pcm_lib_alloc_vmalloc_32_buffer 948 (struct snd_pcm_substream *substream, size_t size); 949 #endif 950 #define snd_pcm_lib_alloc_vmalloc_buffer(subs, size) \ 951 _snd_pcm_lib_alloc_vmalloc_buffer \ 952 (subs, size, GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO) 953 #define snd_pcm_lib_alloc_vmalloc_32_buffer(subs, size) \ 954 _snd_pcm_lib_alloc_vmalloc_buffer \ 955 (subs, size, GFP_KERNEL | GFP_DMA32 | __GFP_ZERO) 956 957 #ifdef CONFIG_SND_DMA_SGBUF 958 /* 959 * SG-buffer handling 960 */ 961 #define snd_pcm_substream_sgbuf(substream) \ 962 ((substream)->runtime->dma_buffer_p->private_data) 963 964 static inline dma_addr_t 965 snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs) 966 { 967 struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream); 968 return snd_sgbuf_get_addr(sg, ofs); 969 } 970 971 static inline void * 972 snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs) 973 { 974 struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream); 975 return snd_sgbuf_get_ptr(sg, ofs); 976 } 977 978 struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream, 979 unsigned long offset); 980 unsigned int snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream, 981 unsigned int ofs, unsigned int size); 982 983 #else /* !SND_DMA_SGBUF */ 984 /* 985 * fake using a continuous buffer 986 */ 987 static inline dma_addr_t 988 snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs) 989 { 990 return substream->runtime->dma_addr + ofs; 991 } 992 993 static inline void * 994 snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs) 995 { 996 return substream->runtime->dma_area + ofs; 997 } 998 999 #define snd_pcm_sgbuf_ops_page NULL 1000 1001 #define snd_pcm_sgbuf_get_chunk_size(subs, ofs, size) (size) 1002 1003 #endif /* SND_DMA_SGBUF */ 1004 1005 /* handle mmap counter - PCM mmap callback should handle this counter properly */ 1006 static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area) 1007 { 1008 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; 1009 atomic_inc(&substream->mmap_count); 1010 } 1011 1012 static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area) 1013 { 1014 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; 1015 atomic_dec(&substream->mmap_count); 1016 } 1017 1018 /* mmap for io-memory area */ 1019 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) 1020 #define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP 1021 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area); 1022 #else 1023 #define SNDRV_PCM_INFO_MMAP_IOMEM 0 1024 #define snd_pcm_lib_mmap_iomem NULL 1025 #endif 1026 1027 int snd_pcm_lib_mmap_noncached(struct snd_pcm_substream *substream, 1028 struct vm_area_struct *area); 1029 #define snd_pcm_lib_mmap_vmalloc snd_pcm_lib_mmap_noncached 1030 1031 static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max) 1032 { 1033 *max = dma < 4 ? 64 * 1024 : 128 * 1024; 1034 } 1035 1036 /* 1037 * Misc 1038 */ 1039 1040 #define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\ 1041 (IEC958_AES1_CON_ORIGINAL<<8)|\ 1042 (IEC958_AES1_CON_PCM_CODER<<8)|\ 1043 (IEC958_AES3_CON_FS_48000<<24)) 1044 1045 #define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime) 1046 1047 const char *snd_pcm_format_name(snd_pcm_format_t format); 1048 1049 #endif /* __SOUND_PCM_H */ 1050