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 #define SNDRV_PCM_FMTBIT_G723_24 (1ULL << SNDRV_PCM_FORMAT_G723_24) 178 #define SNDRV_PCM_FMTBIT_G723_24_1B (1ULL << SNDRV_PCM_FORMAT_G723_24_1B) 179 #define SNDRV_PCM_FMTBIT_G723_40 (1ULL << SNDRV_PCM_FORMAT_G723_40) 180 #define SNDRV_PCM_FMTBIT_G723_40_1B (1ULL << SNDRV_PCM_FORMAT_G723_40_1B) 181 182 #ifdef SNDRV_LITTLE_ENDIAN 183 #define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_LE 184 #define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_LE 185 #define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_LE 186 #define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_LE 187 #define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_LE 188 #define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_LE 189 #define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_LE 190 #define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_LE 191 #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE 192 #endif 193 #ifdef SNDRV_BIG_ENDIAN 194 #define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_BE 195 #define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_BE 196 #define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_BE 197 #define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_BE 198 #define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_BE 199 #define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_BE 200 #define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_BE 201 #define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_BE 202 #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE 203 #endif 204 205 struct snd_pcm_file { 206 struct snd_pcm_substream *substream; 207 int no_compat_mmap; 208 }; 209 210 struct snd_pcm_hw_rule; 211 typedef int (*snd_pcm_hw_rule_func_t)(struct snd_pcm_hw_params *params, 212 struct snd_pcm_hw_rule *rule); 213 214 struct snd_pcm_hw_rule { 215 unsigned int cond; 216 snd_pcm_hw_rule_func_t func; 217 int var; 218 int deps[4]; 219 void *private; 220 }; 221 222 struct snd_pcm_hw_constraints { 223 struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - 224 SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; 225 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - 226 SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1]; 227 unsigned int rules_num; 228 unsigned int rules_all; 229 struct snd_pcm_hw_rule *rules; 230 }; 231 232 static inline struct snd_mask *constrs_mask(struct snd_pcm_hw_constraints *constrs, 233 snd_pcm_hw_param_t var) 234 { 235 return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; 236 } 237 238 static inline struct snd_interval *constrs_interval(struct snd_pcm_hw_constraints *constrs, 239 snd_pcm_hw_param_t var) 240 { 241 return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; 242 } 243 244 struct snd_ratnum { 245 unsigned int num; 246 unsigned int den_min, den_max, den_step; 247 }; 248 249 struct snd_ratden { 250 unsigned int num_min, num_max, num_step; 251 unsigned int den; 252 }; 253 254 struct snd_pcm_hw_constraint_ratnums { 255 int nrats; 256 struct snd_ratnum *rats; 257 }; 258 259 struct snd_pcm_hw_constraint_ratdens { 260 int nrats; 261 struct snd_ratden *rats; 262 }; 263 264 struct snd_pcm_hw_constraint_list { 265 unsigned int count; 266 unsigned int *list; 267 unsigned int mask; 268 }; 269 270 struct snd_pcm_hwptr_log; 271 272 struct snd_pcm_runtime { 273 /* -- Status -- */ 274 struct snd_pcm_substream *trigger_master; 275 struct timespec trigger_tstamp; /* trigger timestamp */ 276 int overrange; 277 snd_pcm_uframes_t avail_max; 278 snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */ 279 snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time */ 280 unsigned long hw_ptr_jiffies; /* Time when hw_ptr is updated */ 281 unsigned long hw_ptr_buffer_jiffies; /* buffer time in jiffies */ 282 snd_pcm_sframes_t delay; /* extra delay; typically FIFO size */ 283 284 /* -- HW params -- */ 285 snd_pcm_access_t access; /* access mode */ 286 snd_pcm_format_t format; /* SNDRV_PCM_FORMAT_* */ 287 snd_pcm_subformat_t subformat; /* subformat */ 288 unsigned int rate; /* rate in Hz */ 289 unsigned int channels; /* channels */ 290 snd_pcm_uframes_t period_size; /* period size */ 291 unsigned int periods; /* periods */ 292 snd_pcm_uframes_t buffer_size; /* buffer size */ 293 snd_pcm_uframes_t min_align; /* Min alignment for the format */ 294 size_t byte_align; 295 unsigned int frame_bits; 296 unsigned int sample_bits; 297 unsigned int info; 298 unsigned int rate_num; 299 unsigned int rate_den; 300 301 /* -- SW params -- */ 302 int tstamp_mode; /* mmap timestamp is updated */ 303 unsigned int period_step; 304 snd_pcm_uframes_t start_threshold; 305 snd_pcm_uframes_t stop_threshold; 306 snd_pcm_uframes_t silence_threshold; /* Silence filling happens when 307 noise is nearest than this */ 308 snd_pcm_uframes_t silence_size; /* Silence filling size */ 309 snd_pcm_uframes_t boundary; /* pointers wrap point */ 310 311 snd_pcm_uframes_t silence_start; /* starting pointer to silence area */ 312 snd_pcm_uframes_t silence_filled; /* size filled with silence */ 313 314 union snd_pcm_sync_id sync; /* hardware synchronization ID */ 315 316 /* -- mmap -- */ 317 struct snd_pcm_mmap_status *status; 318 struct snd_pcm_mmap_control *control; 319 320 /* -- locking / scheduling -- */ 321 snd_pcm_uframes_t twake; /* do transfer (!poll) wakeup if non-zero */ 322 wait_queue_head_t sleep; /* poll sleep */ 323 wait_queue_head_t tsleep; /* transfer sleep */ 324 struct fasync_struct *fasync; 325 326 /* -- private section -- */ 327 void *private_data; 328 void (*private_free)(struct snd_pcm_runtime *runtime); 329 330 /* -- hardware description -- */ 331 struct snd_pcm_hardware hw; 332 struct snd_pcm_hw_constraints hw_constraints; 333 334 /* -- interrupt callbacks -- */ 335 void (*transfer_ack_begin)(struct snd_pcm_substream *substream); 336 void (*transfer_ack_end)(struct snd_pcm_substream *substream); 337 338 /* -- timer -- */ 339 unsigned int timer_resolution; /* timer resolution */ 340 int tstamp_type; /* timestamp type */ 341 342 /* -- DMA -- */ 343 unsigned char *dma_area; /* DMA area */ 344 dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */ 345 size_t dma_bytes; /* size of DMA area */ 346 347 struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */ 348 349 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 350 /* -- OSS things -- */ 351 struct snd_pcm_oss_runtime oss; 352 #endif 353 354 #ifdef CONFIG_SND_PCM_XRUN_DEBUG 355 struct snd_pcm_hwptr_log *hwptr_log; 356 #endif 357 }; 358 359 struct snd_pcm_group { /* keep linked substreams */ 360 spinlock_t lock; 361 struct list_head substreams; 362 int count; 363 }; 364 365 struct pid; 366 367 struct snd_pcm_substream { 368 struct snd_pcm *pcm; 369 struct snd_pcm_str *pstr; 370 void *private_data; /* copied from pcm->private_data */ 371 int number; 372 char name[32]; /* substream name */ 373 int stream; /* stream (direction) */ 374 struct pm_qos_request_list latency_pm_qos_req; /* pm_qos request */ 375 size_t buffer_bytes_max; /* limit ring buffer size */ 376 struct snd_dma_buffer dma_buffer; 377 unsigned int dma_buf_id; 378 size_t dma_max; 379 /* -- hardware operations -- */ 380 struct snd_pcm_ops *ops; 381 /* -- runtime information -- */ 382 struct snd_pcm_runtime *runtime; 383 /* -- timer section -- */ 384 struct snd_timer *timer; /* timer */ 385 unsigned timer_running: 1; /* time is running */ 386 /* -- next substream -- */ 387 struct snd_pcm_substream *next; 388 /* -- linked substreams -- */ 389 struct list_head link_list; /* linked list member */ 390 struct snd_pcm_group self_group; /* fake group for non linked substream (with substream lock inside) */ 391 struct snd_pcm_group *group; /* pointer to current group */ 392 /* -- assigned files -- */ 393 void *file; 394 int ref_count; 395 atomic_t mmap_count; 396 unsigned int f_flags; 397 void (*pcm_release)(struct snd_pcm_substream *); 398 struct pid *pid; 399 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 400 /* -- OSS things -- */ 401 struct snd_pcm_oss_substream oss; 402 #endif 403 #ifdef CONFIG_SND_VERBOSE_PROCFS 404 struct snd_info_entry *proc_root; 405 struct snd_info_entry *proc_info_entry; 406 struct snd_info_entry *proc_hw_params_entry; 407 struct snd_info_entry *proc_sw_params_entry; 408 struct snd_info_entry *proc_status_entry; 409 struct snd_info_entry *proc_prealloc_entry; 410 struct snd_info_entry *proc_prealloc_max_entry; 411 #endif 412 /* misc flags */ 413 unsigned int hw_opened: 1; 414 }; 415 416 #define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0) 417 418 419 struct snd_pcm_str { 420 int stream; /* stream (direction) */ 421 struct snd_pcm *pcm; 422 /* -- substreams -- */ 423 unsigned int substream_count; 424 unsigned int substream_opened; 425 struct snd_pcm_substream *substream; 426 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 427 /* -- OSS things -- */ 428 struct snd_pcm_oss_stream oss; 429 #endif 430 #ifdef CONFIG_SND_VERBOSE_PROCFS 431 struct snd_info_entry *proc_root; 432 struct snd_info_entry *proc_info_entry; 433 #ifdef CONFIG_SND_PCM_XRUN_DEBUG 434 unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */ 435 struct snd_info_entry *proc_xrun_debug_entry; 436 #endif 437 #endif 438 }; 439 440 struct snd_pcm { 441 struct snd_card *card; 442 struct list_head list; 443 int device; /* device number */ 444 unsigned int info_flags; 445 unsigned short dev_class; 446 unsigned short dev_subclass; 447 char id[64]; 448 char name[80]; 449 struct snd_pcm_str streams[2]; 450 struct mutex open_mutex; 451 wait_queue_head_t open_wait; 452 void *private_data; 453 void (*private_free) (struct snd_pcm *pcm); 454 struct device *dev; /* actual hw device this belongs to */ 455 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 456 struct snd_pcm_oss oss; 457 #endif 458 }; 459 460 struct snd_pcm_notify { 461 int (*n_register) (struct snd_pcm * pcm); 462 int (*n_disconnect) (struct snd_pcm * pcm); 463 int (*n_unregister) (struct snd_pcm * pcm); 464 struct list_head list; 465 }; 466 467 /* 468 * Registering 469 */ 470 471 extern const struct file_operations snd_pcm_f_ops[2]; 472 473 int snd_pcm_new(struct snd_card *card, const char *id, int device, 474 int playback_count, int capture_count, 475 struct snd_pcm **rpcm); 476 int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count); 477 478 int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree); 479 480 /* 481 * Native I/O 482 */ 483 484 extern rwlock_t snd_pcm_link_rwlock; 485 486 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info); 487 int snd_pcm_info_user(struct snd_pcm_substream *substream, 488 struct snd_pcm_info __user *info); 489 int snd_pcm_status(struct snd_pcm_substream *substream, 490 struct snd_pcm_status *status); 491 int snd_pcm_start(struct snd_pcm_substream *substream); 492 int snd_pcm_stop(struct snd_pcm_substream *substream, int status); 493 int snd_pcm_drain_done(struct snd_pcm_substream *substream); 494 #ifdef CONFIG_PM 495 int snd_pcm_suspend(struct snd_pcm_substream *substream); 496 int snd_pcm_suspend_all(struct snd_pcm *pcm); 497 #endif 498 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg); 499 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file, 500 struct snd_pcm_substream **rsubstream); 501 void snd_pcm_release_substream(struct snd_pcm_substream *substream); 502 int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file, 503 struct snd_pcm_substream **rsubstream); 504 void snd_pcm_detach_substream(struct snd_pcm_substream *substream); 505 void snd_pcm_vma_notify_data(void *client, void *data); 506 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area); 507 508 /* 509 * PCM library 510 */ 511 512 static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream) 513 { 514 return substream->group != &substream->self_group; 515 } 516 517 static inline void snd_pcm_stream_lock(struct snd_pcm_substream *substream) 518 { 519 read_lock(&snd_pcm_link_rwlock); 520 spin_lock(&substream->self_group.lock); 521 } 522 523 static inline void snd_pcm_stream_unlock(struct snd_pcm_substream *substream) 524 { 525 spin_unlock(&substream->self_group.lock); 526 read_unlock(&snd_pcm_link_rwlock); 527 } 528 529 static inline void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream) 530 { 531 read_lock_irq(&snd_pcm_link_rwlock); 532 spin_lock(&substream->self_group.lock); 533 } 534 535 static inline void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream) 536 { 537 spin_unlock(&substream->self_group.lock); 538 read_unlock_irq(&snd_pcm_link_rwlock); 539 } 540 541 #define snd_pcm_stream_lock_irqsave(substream, flags) \ 542 do { \ 543 read_lock_irqsave(&snd_pcm_link_rwlock, (flags)); \ 544 spin_lock(&substream->self_group.lock); \ 545 } while (0) 546 547 #define snd_pcm_stream_unlock_irqrestore(substream, flags) \ 548 do { \ 549 spin_unlock(&substream->self_group.lock); \ 550 read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \ 551 } while (0) 552 553 #define snd_pcm_group_for_each_entry(s, substream) \ 554 list_for_each_entry(s, &substream->group->substreams, link_list) 555 556 static inline int snd_pcm_running(struct snd_pcm_substream *substream) 557 { 558 return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING || 559 (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING && 560 substream->stream == SNDRV_PCM_STREAM_PLAYBACK)); 561 } 562 563 static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size) 564 { 565 return size * 8 / runtime->sample_bits; 566 } 567 568 static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size) 569 { 570 return size * 8 / runtime->frame_bits; 571 } 572 573 static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size) 574 { 575 return size * runtime->sample_bits / 8; 576 } 577 578 static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size) 579 { 580 return size * runtime->frame_bits / 8; 581 } 582 583 static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes) 584 { 585 return bytes % runtime->byte_align == 0; 586 } 587 588 static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream) 589 { 590 struct snd_pcm_runtime *runtime = substream->runtime; 591 return frames_to_bytes(runtime, runtime->buffer_size); 592 } 593 594 static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream) 595 { 596 struct snd_pcm_runtime *runtime = substream->runtime; 597 return frames_to_bytes(runtime, runtime->period_size); 598 } 599 600 /* 601 * result is: 0 ... (boundary - 1) 602 */ 603 static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime) 604 { 605 snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr; 606 if (avail < 0) 607 avail += runtime->boundary; 608 else if ((snd_pcm_uframes_t) avail >= runtime->boundary) 609 avail -= runtime->boundary; 610 return avail; 611 } 612 613 /* 614 * result is: 0 ... (boundary - 1) 615 */ 616 static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime) 617 { 618 snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr; 619 if (avail < 0) 620 avail += runtime->boundary; 621 return avail; 622 } 623 624 static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime) 625 { 626 return runtime->buffer_size - snd_pcm_playback_avail(runtime); 627 } 628 629 static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime) 630 { 631 return runtime->buffer_size - snd_pcm_capture_avail(runtime); 632 } 633 634 /** 635 * snd_pcm_playback_ready - check whether the playback buffer is available 636 * @substream: the pcm substream instance 637 * 638 * Checks whether enough free space is available on the playback buffer. 639 * 640 * Returns non-zero if available, or zero if not. 641 */ 642 static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream) 643 { 644 struct snd_pcm_runtime *runtime = substream->runtime; 645 return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min; 646 } 647 648 /** 649 * snd_pcm_capture_ready - check whether the capture buffer is available 650 * @substream: the pcm substream instance 651 * 652 * Checks whether enough capture data is available on the capture buffer. 653 * 654 * Returns non-zero if available, or zero if not. 655 */ 656 static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream) 657 { 658 struct snd_pcm_runtime *runtime = substream->runtime; 659 return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min; 660 } 661 662 /** 663 * snd_pcm_playback_data - check whether any data exists on the playback buffer 664 * @substream: the pcm substream instance 665 * 666 * Checks whether any data exists on the playback buffer. If stop_threshold 667 * is bigger or equal to boundary, then this function returns always non-zero. 668 * 669 * Returns non-zero if exists, or zero if not. 670 */ 671 static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream) 672 { 673 struct snd_pcm_runtime *runtime = substream->runtime; 674 675 if (runtime->stop_threshold >= runtime->boundary) 676 return 1; 677 return snd_pcm_playback_avail(runtime) < runtime->buffer_size; 678 } 679 680 /** 681 * snd_pcm_playback_empty - check whether the playback buffer is empty 682 * @substream: the pcm substream instance 683 * 684 * Checks whether the playback buffer is empty. 685 * 686 * Returns non-zero if empty, or zero if not. 687 */ 688 static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream) 689 { 690 struct snd_pcm_runtime *runtime = substream->runtime; 691 return snd_pcm_playback_avail(runtime) >= runtime->buffer_size; 692 } 693 694 /** 695 * snd_pcm_capture_empty - check whether the capture buffer is empty 696 * @substream: the pcm substream instance 697 * 698 * Checks whether the capture buffer is empty. 699 * 700 * Returns non-zero if empty, or zero if not. 701 */ 702 static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream) 703 { 704 struct snd_pcm_runtime *runtime = substream->runtime; 705 return snd_pcm_capture_avail(runtime) == 0; 706 } 707 708 static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream, 709 struct snd_pcm_substream *master) 710 { 711 substream->runtime->trigger_master = master; 712 } 713 714 static inline int hw_is_mask(int var) 715 { 716 return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK && 717 var <= SNDRV_PCM_HW_PARAM_LAST_MASK; 718 } 719 720 static inline int hw_is_interval(int var) 721 { 722 return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL && 723 var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; 724 } 725 726 static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params, 727 snd_pcm_hw_param_t var) 728 { 729 return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; 730 } 731 732 static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params, 733 snd_pcm_hw_param_t var) 734 { 735 return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; 736 } 737 738 static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params, 739 snd_pcm_hw_param_t var) 740 { 741 return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; 742 } 743 744 static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params, 745 snd_pcm_hw_param_t var) 746 { 747 return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; 748 } 749 750 #define params_access(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_ACCESS)) 751 #define params_format(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_FORMAT)) 752 #define params_subformat(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_SUBFORMAT)) 753 #define params_channels(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min 754 #define params_rate(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_RATE)->min 755 #define params_period_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min 756 #define params_period_bytes(p) ((params_period_size(p)*snd_pcm_format_physical_width(params_format(p))*params_channels(p))/8) 757 #define params_periods(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIODS)->min 758 #define params_buffer_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min 759 #define params_buffer_bytes(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min 760 761 762 int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v); 763 void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); 764 void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); 765 void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, 766 unsigned int k, struct snd_interval *c); 767 void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, 768 const struct snd_interval *b, struct snd_interval *c); 769 int snd_interval_list(struct snd_interval *i, unsigned int count, unsigned int *list, unsigned int mask); 770 int snd_interval_ratnum(struct snd_interval *i, 771 unsigned int rats_count, struct snd_ratnum *rats, 772 unsigned int *nump, unsigned int *denp); 773 774 void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params); 775 void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var); 776 int snd_pcm_hw_params_choose(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); 777 778 int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); 779 780 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream); 781 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream); 782 783 int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, 784 u_int32_t mask); 785 int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, 786 u_int64_t mask); 787 int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, 788 unsigned int min, unsigned int max); 789 int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var); 790 int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, 791 unsigned int cond, 792 snd_pcm_hw_param_t var, 793 struct snd_pcm_hw_constraint_list *l); 794 int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, 795 unsigned int cond, 796 snd_pcm_hw_param_t var, 797 struct snd_pcm_hw_constraint_ratnums *r); 798 int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, 799 unsigned int cond, 800 snd_pcm_hw_param_t var, 801 struct snd_pcm_hw_constraint_ratdens *r); 802 int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, 803 unsigned int cond, 804 unsigned int width, 805 unsigned int msbits); 806 int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, 807 unsigned int cond, 808 snd_pcm_hw_param_t var, 809 unsigned long step); 810 int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, 811 unsigned int cond, 812 snd_pcm_hw_param_t var); 813 int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, 814 unsigned int cond, 815 int var, 816 snd_pcm_hw_rule_func_t func, void *private, 817 int dep, ...); 818 819 int snd_pcm_format_signed(snd_pcm_format_t format); 820 int snd_pcm_format_unsigned(snd_pcm_format_t format); 821 int snd_pcm_format_linear(snd_pcm_format_t format); 822 int snd_pcm_format_little_endian(snd_pcm_format_t format); 823 int snd_pcm_format_big_endian(snd_pcm_format_t format); 824 #if 0 /* just for DocBook */ 825 /** 826 * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian 827 * @format: the format to check 828 * 829 * Returns 1 if the given PCM format is CPU-endian, 0 if 830 * opposite, or a negative error code if endian not specified. 831 */ 832 int snd_pcm_format_cpu_endian(snd_pcm_format_t format); 833 #endif /* DocBook */ 834 #ifdef SNDRV_LITTLE_ENDIAN 835 #define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format) 836 #else 837 #define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format) 838 #endif 839 int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */ 840 int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */ 841 ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples); 842 const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format); 843 int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames); 844 snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian); 845 846 void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, struct snd_pcm_ops *ops); 847 void snd_pcm_set_sync(struct snd_pcm_substream *substream); 848 int snd_pcm_lib_interleave_len(struct snd_pcm_substream *substream); 849 int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, 850 unsigned int cmd, void *arg); 851 int snd_pcm_update_state(struct snd_pcm_substream *substream, 852 struct snd_pcm_runtime *runtime); 853 int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream); 854 int snd_pcm_playback_xrun_check(struct snd_pcm_substream *substream); 855 int snd_pcm_capture_xrun_check(struct snd_pcm_substream *substream); 856 int snd_pcm_playback_xrun_asap(struct snd_pcm_substream *substream); 857 int snd_pcm_capture_xrun_asap(struct snd_pcm_substream *substream); 858 void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr); 859 void snd_pcm_period_elapsed(struct snd_pcm_substream *substream); 860 snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, 861 const void __user *buf, 862 snd_pcm_uframes_t frames); 863 snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, 864 void __user *buf, snd_pcm_uframes_t frames); 865 snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, 866 void __user **bufs, snd_pcm_uframes_t frames); 867 snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, 868 void __user **bufs, snd_pcm_uframes_t frames); 869 870 extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates; 871 872 int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime); 873 unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate); 874 875 static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream, 876 struct snd_dma_buffer *bufp) 877 { 878 struct snd_pcm_runtime *runtime = substream->runtime; 879 if (bufp) { 880 runtime->dma_buffer_p = bufp; 881 runtime->dma_area = bufp->area; 882 runtime->dma_addr = bufp->addr; 883 runtime->dma_bytes = bufp->bytes; 884 } else { 885 runtime->dma_buffer_p = NULL; 886 runtime->dma_area = NULL; 887 runtime->dma_addr = 0; 888 runtime->dma_bytes = 0; 889 } 890 } 891 892 /* 893 * Timer interface 894 */ 895 896 void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream); 897 void snd_pcm_timer_init(struct snd_pcm_substream *substream); 898 void snd_pcm_timer_done(struct snd_pcm_substream *substream); 899 900 static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime, 901 struct timespec *tv) 902 { 903 if (runtime->tstamp_type == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC) 904 do_posix_clock_monotonic_gettime(tv); 905 else 906 getnstimeofday(tv); 907 } 908 909 /* 910 * Memory 911 */ 912 913 int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream); 914 int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm); 915 int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream, 916 int type, struct device *data, 917 size_t size, size_t max); 918 int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm, 919 int type, void *data, 920 size_t size, size_t max); 921 int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size); 922 int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream); 923 924 int _snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream *substream, 925 size_t size, gfp_t gfp_flags); 926 int snd_pcm_lib_free_vmalloc_buffer(struct snd_pcm_substream *substream); 927 struct page *snd_pcm_lib_get_vmalloc_page(struct snd_pcm_substream *substream, 928 unsigned long offset); 929 #if 0 /* for kernel-doc */ 930 /** 931 * snd_pcm_lib_alloc_vmalloc_buffer - allocate virtual DMA buffer 932 * @substream: the substream to allocate the buffer to 933 * @size: the requested buffer size, in bytes 934 * 935 * Allocates the PCM substream buffer using vmalloc(), i.e., the memory is 936 * contiguous in kernel virtual space, but not in physical memory. Use this 937 * if the buffer is accessed by kernel code but not by device DMA. 938 * 939 * Returns 1 if the buffer was changed, 0 if not changed, or a negative error 940 * code. 941 */ 942 static int snd_pcm_lib_alloc_vmalloc_buffer 943 (struct snd_pcm_substream *substream, size_t size); 944 /** 945 * snd_pcm_lib_alloc_vmalloc_32_buffer - allocate 32-bit-addressable buffer 946 * @substream: the substream to allocate the buffer to 947 * @size: the requested buffer size, in bytes 948 * 949 * This function works like snd_pcm_lib_alloc_vmalloc_buffer(), but uses 950 * vmalloc_32(), i.e., the pages are allocated from 32-bit-addressable memory. 951 */ 952 static int snd_pcm_lib_alloc_vmalloc_32_buffer 953 (struct snd_pcm_substream *substream, size_t size); 954 #endif 955 #define snd_pcm_lib_alloc_vmalloc_buffer(subs, size) \ 956 _snd_pcm_lib_alloc_vmalloc_buffer \ 957 (subs, size, GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO) 958 #define snd_pcm_lib_alloc_vmalloc_32_buffer(subs, size) \ 959 _snd_pcm_lib_alloc_vmalloc_buffer \ 960 (subs, size, GFP_KERNEL | GFP_DMA32 | __GFP_ZERO) 961 962 #ifdef CONFIG_SND_DMA_SGBUF 963 /* 964 * SG-buffer handling 965 */ 966 #define snd_pcm_substream_sgbuf(substream) \ 967 ((substream)->runtime->dma_buffer_p->private_data) 968 969 static inline dma_addr_t 970 snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs) 971 { 972 struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream); 973 return snd_sgbuf_get_addr(sg, ofs); 974 } 975 976 static inline void * 977 snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs) 978 { 979 struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream); 980 return snd_sgbuf_get_ptr(sg, ofs); 981 } 982 983 struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream, 984 unsigned long offset); 985 unsigned int snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream, 986 unsigned int ofs, unsigned int size); 987 988 #else /* !SND_DMA_SGBUF */ 989 /* 990 * fake using a continuous buffer 991 */ 992 static inline dma_addr_t 993 snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs) 994 { 995 return substream->runtime->dma_addr + ofs; 996 } 997 998 static inline void * 999 snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs) 1000 { 1001 return substream->runtime->dma_area + ofs; 1002 } 1003 1004 #define snd_pcm_sgbuf_ops_page NULL 1005 1006 #define snd_pcm_sgbuf_get_chunk_size(subs, ofs, size) (size) 1007 1008 #endif /* SND_DMA_SGBUF */ 1009 1010 /* handle mmap counter - PCM mmap callback should handle this counter properly */ 1011 static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area) 1012 { 1013 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; 1014 atomic_inc(&substream->mmap_count); 1015 } 1016 1017 static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area) 1018 { 1019 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; 1020 atomic_dec(&substream->mmap_count); 1021 } 1022 1023 /* mmap for io-memory area */ 1024 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) 1025 #define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP 1026 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area); 1027 #else 1028 #define SNDRV_PCM_INFO_MMAP_IOMEM 0 1029 #define snd_pcm_lib_mmap_iomem NULL 1030 #endif 1031 1032 int snd_pcm_lib_mmap_noncached(struct snd_pcm_substream *substream, 1033 struct vm_area_struct *area); 1034 #define snd_pcm_lib_mmap_vmalloc snd_pcm_lib_mmap_noncached 1035 1036 static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max) 1037 { 1038 *max = dma < 4 ? 64 * 1024 : 128 * 1024; 1039 } 1040 1041 /* 1042 * Misc 1043 */ 1044 1045 #define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\ 1046 (IEC958_AES1_CON_ORIGINAL<<8)|\ 1047 (IEC958_AES1_CON_PCM_CODER<<8)|\ 1048 (IEC958_AES3_CON_FS_48000<<24)) 1049 1050 #define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime) 1051 1052 const char *snd_pcm_format_name(snd_pcm_format_t format); 1053 1054 #endif /* __SOUND_PCM_H */ 1055