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 unsigned int no_period_wakeup: 1; 301 302 /* -- SW params -- */ 303 int tstamp_mode; /* mmap timestamp is updated */ 304 unsigned int period_step; 305 snd_pcm_uframes_t start_threshold; 306 snd_pcm_uframes_t stop_threshold; 307 snd_pcm_uframes_t silence_threshold; /* Silence filling happens when 308 noise is nearest than this */ 309 snd_pcm_uframes_t silence_size; /* Silence filling size */ 310 snd_pcm_uframes_t boundary; /* pointers wrap point */ 311 312 snd_pcm_uframes_t silence_start; /* starting pointer to silence area */ 313 snd_pcm_uframes_t silence_filled; /* size filled with silence */ 314 315 union snd_pcm_sync_id sync; /* hardware synchronization ID */ 316 317 /* -- mmap -- */ 318 struct snd_pcm_mmap_status *status; 319 struct snd_pcm_mmap_control *control; 320 321 /* -- locking / scheduling -- */ 322 snd_pcm_uframes_t twake; /* do transfer (!poll) wakeup if non-zero */ 323 wait_queue_head_t sleep; /* poll sleep */ 324 wait_queue_head_t tsleep; /* transfer sleep */ 325 struct fasync_struct *fasync; 326 327 /* -- private section -- */ 328 void *private_data; 329 void (*private_free)(struct snd_pcm_runtime *runtime); 330 331 /* -- hardware description -- */ 332 struct snd_pcm_hardware hw; 333 struct snd_pcm_hw_constraints hw_constraints; 334 335 /* -- interrupt callbacks -- */ 336 void (*transfer_ack_begin)(struct snd_pcm_substream *substream); 337 void (*transfer_ack_end)(struct snd_pcm_substream *substream); 338 339 /* -- timer -- */ 340 unsigned int timer_resolution; /* timer resolution */ 341 int tstamp_type; /* timestamp type */ 342 343 /* -- DMA -- */ 344 unsigned char *dma_area; /* DMA area */ 345 dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */ 346 size_t dma_bytes; /* size of DMA area */ 347 348 struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */ 349 350 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 351 /* -- OSS things -- */ 352 struct snd_pcm_oss_runtime oss; 353 #endif 354 355 #ifdef CONFIG_SND_PCM_XRUN_DEBUG 356 struct snd_pcm_hwptr_log *hwptr_log; 357 #endif 358 }; 359 360 struct snd_pcm_group { /* keep linked substreams */ 361 spinlock_t lock; 362 struct list_head substreams; 363 int count; 364 }; 365 366 struct pid; 367 368 struct snd_pcm_substream { 369 struct snd_pcm *pcm; 370 struct snd_pcm_str *pstr; 371 void *private_data; /* copied from pcm->private_data */ 372 int number; 373 char name[32]; /* substream name */ 374 int stream; /* stream (direction) */ 375 struct pm_qos_request_list latency_pm_qos_req; /* pm_qos request */ 376 size_t buffer_bytes_max; /* limit ring buffer size */ 377 struct snd_dma_buffer dma_buffer; 378 unsigned int dma_buf_id; 379 size_t dma_max; 380 /* -- hardware operations -- */ 381 struct snd_pcm_ops *ops; 382 /* -- runtime information -- */ 383 struct snd_pcm_runtime *runtime; 384 /* -- timer section -- */ 385 struct snd_timer *timer; /* timer */ 386 unsigned timer_running: 1; /* time is running */ 387 /* -- next substream -- */ 388 struct snd_pcm_substream *next; 389 /* -- linked substreams -- */ 390 struct list_head link_list; /* linked list member */ 391 struct snd_pcm_group self_group; /* fake group for non linked substream (with substream lock inside) */ 392 struct snd_pcm_group *group; /* pointer to current group */ 393 /* -- assigned files -- */ 394 void *file; 395 int ref_count; 396 atomic_t mmap_count; 397 unsigned int f_flags; 398 void (*pcm_release)(struct snd_pcm_substream *); 399 struct pid *pid; 400 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 401 /* -- OSS things -- */ 402 struct snd_pcm_oss_substream oss; 403 #endif 404 #ifdef CONFIG_SND_VERBOSE_PROCFS 405 struct snd_info_entry *proc_root; 406 struct snd_info_entry *proc_info_entry; 407 struct snd_info_entry *proc_hw_params_entry; 408 struct snd_info_entry *proc_sw_params_entry; 409 struct snd_info_entry *proc_status_entry; 410 struct snd_info_entry *proc_prealloc_entry; 411 struct snd_info_entry *proc_prealloc_max_entry; 412 #endif 413 /* misc flags */ 414 unsigned int hw_opened: 1; 415 }; 416 417 #define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0) 418 419 420 struct snd_pcm_str { 421 int stream; /* stream (direction) */ 422 struct snd_pcm *pcm; 423 /* -- substreams -- */ 424 unsigned int substream_count; 425 unsigned int substream_opened; 426 struct snd_pcm_substream *substream; 427 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 428 /* -- OSS things -- */ 429 struct snd_pcm_oss_stream oss; 430 #endif 431 #ifdef CONFIG_SND_VERBOSE_PROCFS 432 struct snd_info_entry *proc_root; 433 struct snd_info_entry *proc_info_entry; 434 #ifdef CONFIG_SND_PCM_XRUN_DEBUG 435 unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */ 436 struct snd_info_entry *proc_xrun_debug_entry; 437 #endif 438 #endif 439 }; 440 441 struct snd_pcm { 442 struct snd_card *card; 443 struct list_head list; 444 int device; /* device number */ 445 unsigned int info_flags; 446 unsigned short dev_class; 447 unsigned short dev_subclass; 448 char id[64]; 449 char name[80]; 450 struct snd_pcm_str streams[2]; 451 struct mutex open_mutex; 452 wait_queue_head_t open_wait; 453 void *private_data; 454 void (*private_free) (struct snd_pcm *pcm); 455 struct device *dev; /* actual hw device this belongs to */ 456 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 457 struct snd_pcm_oss oss; 458 #endif 459 }; 460 461 struct snd_pcm_notify { 462 int (*n_register) (struct snd_pcm * pcm); 463 int (*n_disconnect) (struct snd_pcm * pcm); 464 int (*n_unregister) (struct snd_pcm * pcm); 465 struct list_head list; 466 }; 467 468 /* 469 * Registering 470 */ 471 472 extern const struct file_operations snd_pcm_f_ops[2]; 473 474 int snd_pcm_new(struct snd_card *card, const char *id, int device, 475 int playback_count, int capture_count, 476 struct snd_pcm **rpcm); 477 int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count); 478 479 int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree); 480 481 /* 482 * Native I/O 483 */ 484 485 extern rwlock_t snd_pcm_link_rwlock; 486 487 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info); 488 int snd_pcm_info_user(struct snd_pcm_substream *substream, 489 struct snd_pcm_info __user *info); 490 int snd_pcm_status(struct snd_pcm_substream *substream, 491 struct snd_pcm_status *status); 492 int snd_pcm_start(struct snd_pcm_substream *substream); 493 int snd_pcm_stop(struct snd_pcm_substream *substream, int status); 494 int snd_pcm_drain_done(struct snd_pcm_substream *substream); 495 #ifdef CONFIG_PM 496 int snd_pcm_suspend(struct snd_pcm_substream *substream); 497 int snd_pcm_suspend_all(struct snd_pcm *pcm); 498 #endif 499 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg); 500 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file, 501 struct snd_pcm_substream **rsubstream); 502 void snd_pcm_release_substream(struct snd_pcm_substream *substream); 503 int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file, 504 struct snd_pcm_substream **rsubstream); 505 void snd_pcm_detach_substream(struct snd_pcm_substream *substream); 506 void snd_pcm_vma_notify_data(void *client, void *data); 507 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area); 508 509 /* 510 * PCM library 511 */ 512 513 static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream) 514 { 515 return substream->group != &substream->self_group; 516 } 517 518 static inline void snd_pcm_stream_lock(struct snd_pcm_substream *substream) 519 { 520 read_lock(&snd_pcm_link_rwlock); 521 spin_lock(&substream->self_group.lock); 522 } 523 524 static inline void snd_pcm_stream_unlock(struct snd_pcm_substream *substream) 525 { 526 spin_unlock(&substream->self_group.lock); 527 read_unlock(&snd_pcm_link_rwlock); 528 } 529 530 static inline void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream) 531 { 532 read_lock_irq(&snd_pcm_link_rwlock); 533 spin_lock(&substream->self_group.lock); 534 } 535 536 static inline void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream) 537 { 538 spin_unlock(&substream->self_group.lock); 539 read_unlock_irq(&snd_pcm_link_rwlock); 540 } 541 542 #define snd_pcm_stream_lock_irqsave(substream, flags) \ 543 do { \ 544 read_lock_irqsave(&snd_pcm_link_rwlock, (flags)); \ 545 spin_lock(&substream->self_group.lock); \ 546 } while (0) 547 548 #define snd_pcm_stream_unlock_irqrestore(substream, flags) \ 549 do { \ 550 spin_unlock(&substream->self_group.lock); \ 551 read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \ 552 } while (0) 553 554 #define snd_pcm_group_for_each_entry(s, substream) \ 555 list_for_each_entry(s, &substream->group->substreams, link_list) 556 557 static inline int snd_pcm_running(struct snd_pcm_substream *substream) 558 { 559 return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING || 560 (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING && 561 substream->stream == SNDRV_PCM_STREAM_PLAYBACK)); 562 } 563 564 static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size) 565 { 566 return size * 8 / runtime->sample_bits; 567 } 568 569 static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size) 570 { 571 return size * 8 / runtime->frame_bits; 572 } 573 574 static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size) 575 { 576 return size * runtime->sample_bits / 8; 577 } 578 579 static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size) 580 { 581 return size * runtime->frame_bits / 8; 582 } 583 584 static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes) 585 { 586 return bytes % runtime->byte_align == 0; 587 } 588 589 static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream) 590 { 591 struct snd_pcm_runtime *runtime = substream->runtime; 592 return frames_to_bytes(runtime, runtime->buffer_size); 593 } 594 595 static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream) 596 { 597 struct snd_pcm_runtime *runtime = substream->runtime; 598 return frames_to_bytes(runtime, runtime->period_size); 599 } 600 601 /* 602 * result is: 0 ... (boundary - 1) 603 */ 604 static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime) 605 { 606 snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr; 607 if (avail < 0) 608 avail += runtime->boundary; 609 else if ((snd_pcm_uframes_t) avail >= runtime->boundary) 610 avail -= runtime->boundary; 611 return avail; 612 } 613 614 /* 615 * result is: 0 ... (boundary - 1) 616 */ 617 static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime) 618 { 619 snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr; 620 if (avail < 0) 621 avail += runtime->boundary; 622 return avail; 623 } 624 625 static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime) 626 { 627 return runtime->buffer_size - snd_pcm_playback_avail(runtime); 628 } 629 630 static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime) 631 { 632 return runtime->buffer_size - snd_pcm_capture_avail(runtime); 633 } 634 635 /** 636 * snd_pcm_playback_ready - check whether the playback buffer is available 637 * @substream: the pcm substream instance 638 * 639 * Checks whether enough free space is available on the playback buffer. 640 * 641 * Returns non-zero if available, or zero if not. 642 */ 643 static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream) 644 { 645 struct snd_pcm_runtime *runtime = substream->runtime; 646 return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min; 647 } 648 649 /** 650 * snd_pcm_capture_ready - check whether the capture buffer is available 651 * @substream: the pcm substream instance 652 * 653 * Checks whether enough capture data is available on the capture buffer. 654 * 655 * Returns non-zero if available, or zero if not. 656 */ 657 static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream) 658 { 659 struct snd_pcm_runtime *runtime = substream->runtime; 660 return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min; 661 } 662 663 /** 664 * snd_pcm_playback_data - check whether any data exists on the playback buffer 665 * @substream: the pcm substream instance 666 * 667 * Checks whether any data exists on the playback buffer. If stop_threshold 668 * is bigger or equal to boundary, then this function returns always non-zero. 669 * 670 * Returns non-zero if exists, or zero if not. 671 */ 672 static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream) 673 { 674 struct snd_pcm_runtime *runtime = substream->runtime; 675 676 if (runtime->stop_threshold >= runtime->boundary) 677 return 1; 678 return snd_pcm_playback_avail(runtime) < runtime->buffer_size; 679 } 680 681 /** 682 * snd_pcm_playback_empty - check whether the playback buffer is empty 683 * @substream: the pcm substream instance 684 * 685 * Checks whether the playback buffer is empty. 686 * 687 * Returns non-zero if empty, or zero if not. 688 */ 689 static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream) 690 { 691 struct snd_pcm_runtime *runtime = substream->runtime; 692 return snd_pcm_playback_avail(runtime) >= runtime->buffer_size; 693 } 694 695 /** 696 * snd_pcm_capture_empty - check whether the capture buffer is empty 697 * @substream: the pcm substream instance 698 * 699 * Checks whether the capture buffer is empty. 700 * 701 * Returns non-zero if empty, or zero if not. 702 */ 703 static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream) 704 { 705 struct snd_pcm_runtime *runtime = substream->runtime; 706 return snd_pcm_capture_avail(runtime) == 0; 707 } 708 709 static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream, 710 struct snd_pcm_substream *master) 711 { 712 substream->runtime->trigger_master = master; 713 } 714 715 static inline int hw_is_mask(int var) 716 { 717 return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK && 718 var <= SNDRV_PCM_HW_PARAM_LAST_MASK; 719 } 720 721 static inline int hw_is_interval(int var) 722 { 723 return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL && 724 var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; 725 } 726 727 static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params, 728 snd_pcm_hw_param_t var) 729 { 730 return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; 731 } 732 733 static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params, 734 snd_pcm_hw_param_t var) 735 { 736 return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; 737 } 738 739 static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params, 740 snd_pcm_hw_param_t var) 741 { 742 return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; 743 } 744 745 static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params, 746 snd_pcm_hw_param_t var) 747 { 748 return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; 749 } 750 751 #define params_access(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_ACCESS)) 752 #define params_format(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_FORMAT)) 753 #define params_subformat(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_SUBFORMAT)) 754 #define params_channels(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min 755 #define params_rate(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_RATE)->min 756 #define params_period_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min 757 #define params_period_bytes(p) ((params_period_size(p)*snd_pcm_format_physical_width(params_format(p))*params_channels(p))/8) 758 #define params_periods(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIODS)->min 759 #define params_buffer_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min 760 #define params_buffer_bytes(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min 761 762 763 int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v); 764 void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); 765 void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); 766 void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, 767 unsigned int k, struct snd_interval *c); 768 void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, 769 const struct snd_interval *b, struct snd_interval *c); 770 int snd_interval_list(struct snd_interval *i, unsigned int count, unsigned int *list, unsigned int mask); 771 int snd_interval_ratnum(struct snd_interval *i, 772 unsigned int rats_count, struct snd_ratnum *rats, 773 unsigned int *nump, unsigned int *denp); 774 775 void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params); 776 void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var); 777 int snd_pcm_hw_params_choose(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); 778 779 int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); 780 781 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream); 782 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream); 783 784 int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, 785 u_int32_t mask); 786 int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, 787 u_int64_t mask); 788 int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, 789 unsigned int min, unsigned int max); 790 int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var); 791 int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, 792 unsigned int cond, 793 snd_pcm_hw_param_t var, 794 struct snd_pcm_hw_constraint_list *l); 795 int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, 796 unsigned int cond, 797 snd_pcm_hw_param_t var, 798 struct snd_pcm_hw_constraint_ratnums *r); 799 int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, 800 unsigned int cond, 801 snd_pcm_hw_param_t var, 802 struct snd_pcm_hw_constraint_ratdens *r); 803 int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, 804 unsigned int cond, 805 unsigned int width, 806 unsigned int msbits); 807 int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, 808 unsigned int cond, 809 snd_pcm_hw_param_t var, 810 unsigned long step); 811 int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, 812 unsigned int cond, 813 snd_pcm_hw_param_t var); 814 int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, 815 unsigned int cond, 816 int var, 817 snd_pcm_hw_rule_func_t func, void *private, 818 int dep, ...); 819 820 int snd_pcm_format_signed(snd_pcm_format_t format); 821 int snd_pcm_format_unsigned(snd_pcm_format_t format); 822 int snd_pcm_format_linear(snd_pcm_format_t format); 823 int snd_pcm_format_little_endian(snd_pcm_format_t format); 824 int snd_pcm_format_big_endian(snd_pcm_format_t format); 825 #if 0 /* just for DocBook */ 826 /** 827 * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian 828 * @format: the format to check 829 * 830 * Returns 1 if the given PCM format is CPU-endian, 0 if 831 * opposite, or a negative error code if endian not specified. 832 */ 833 int snd_pcm_format_cpu_endian(snd_pcm_format_t format); 834 #endif /* DocBook */ 835 #ifdef SNDRV_LITTLE_ENDIAN 836 #define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format) 837 #else 838 #define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format) 839 #endif 840 int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */ 841 int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */ 842 ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples); 843 const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format); 844 int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames); 845 snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian); 846 847 void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, struct snd_pcm_ops *ops); 848 void snd_pcm_set_sync(struct snd_pcm_substream *substream); 849 int snd_pcm_lib_interleave_len(struct snd_pcm_substream *substream); 850 int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, 851 unsigned int cmd, void *arg); 852 int snd_pcm_update_state(struct snd_pcm_substream *substream, 853 struct snd_pcm_runtime *runtime); 854 int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream); 855 int snd_pcm_playback_xrun_check(struct snd_pcm_substream *substream); 856 int snd_pcm_capture_xrun_check(struct snd_pcm_substream *substream); 857 int snd_pcm_playback_xrun_asap(struct snd_pcm_substream *substream); 858 int snd_pcm_capture_xrun_asap(struct snd_pcm_substream *substream); 859 void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr); 860 void snd_pcm_period_elapsed(struct snd_pcm_substream *substream); 861 snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, 862 const void __user *buf, 863 snd_pcm_uframes_t frames); 864 snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, 865 void __user *buf, snd_pcm_uframes_t frames); 866 snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, 867 void __user **bufs, snd_pcm_uframes_t frames); 868 snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, 869 void __user **bufs, snd_pcm_uframes_t frames); 870 871 extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates; 872 873 int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime); 874 unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate); 875 876 static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream, 877 struct snd_dma_buffer *bufp) 878 { 879 struct snd_pcm_runtime *runtime = substream->runtime; 880 if (bufp) { 881 runtime->dma_buffer_p = bufp; 882 runtime->dma_area = bufp->area; 883 runtime->dma_addr = bufp->addr; 884 runtime->dma_bytes = bufp->bytes; 885 } else { 886 runtime->dma_buffer_p = NULL; 887 runtime->dma_area = NULL; 888 runtime->dma_addr = 0; 889 runtime->dma_bytes = 0; 890 } 891 } 892 893 /* 894 * Timer interface 895 */ 896 897 void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream); 898 void snd_pcm_timer_init(struct snd_pcm_substream *substream); 899 void snd_pcm_timer_done(struct snd_pcm_substream *substream); 900 901 static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime, 902 struct timespec *tv) 903 { 904 if (runtime->tstamp_type == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC) 905 do_posix_clock_monotonic_gettime(tv); 906 else 907 getnstimeofday(tv); 908 } 909 910 /* 911 * Memory 912 */ 913 914 int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream); 915 int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm); 916 int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream, 917 int type, struct device *data, 918 size_t size, size_t max); 919 int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm, 920 int type, void *data, 921 size_t size, size_t max); 922 int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size); 923 int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream); 924 925 int _snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream *substream, 926 size_t size, gfp_t gfp_flags); 927 int snd_pcm_lib_free_vmalloc_buffer(struct snd_pcm_substream *substream); 928 struct page *snd_pcm_lib_get_vmalloc_page(struct snd_pcm_substream *substream, 929 unsigned long offset); 930 #if 0 /* for kernel-doc */ 931 /** 932 * snd_pcm_lib_alloc_vmalloc_buffer - allocate virtual DMA buffer 933 * @substream: the substream to allocate the buffer to 934 * @size: the requested buffer size, in bytes 935 * 936 * Allocates the PCM substream buffer using vmalloc(), i.e., the memory is 937 * contiguous in kernel virtual space, but not in physical memory. Use this 938 * if the buffer is accessed by kernel code but not by device DMA. 939 * 940 * Returns 1 if the buffer was changed, 0 if not changed, or a negative error 941 * code. 942 */ 943 static int snd_pcm_lib_alloc_vmalloc_buffer 944 (struct snd_pcm_substream *substream, size_t size); 945 /** 946 * snd_pcm_lib_alloc_vmalloc_32_buffer - allocate 32-bit-addressable buffer 947 * @substream: the substream to allocate the buffer to 948 * @size: the requested buffer size, in bytes 949 * 950 * This function works like snd_pcm_lib_alloc_vmalloc_buffer(), but uses 951 * vmalloc_32(), i.e., the pages are allocated from 32-bit-addressable memory. 952 */ 953 static int snd_pcm_lib_alloc_vmalloc_32_buffer 954 (struct snd_pcm_substream *substream, size_t size); 955 #endif 956 #define snd_pcm_lib_alloc_vmalloc_buffer(subs, size) \ 957 _snd_pcm_lib_alloc_vmalloc_buffer \ 958 (subs, size, GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO) 959 #define snd_pcm_lib_alloc_vmalloc_32_buffer(subs, size) \ 960 _snd_pcm_lib_alloc_vmalloc_buffer \ 961 (subs, size, GFP_KERNEL | GFP_DMA32 | __GFP_ZERO) 962 963 #ifdef CONFIG_SND_DMA_SGBUF 964 /* 965 * SG-buffer handling 966 */ 967 #define snd_pcm_substream_sgbuf(substream) \ 968 ((substream)->runtime->dma_buffer_p->private_data) 969 970 static inline dma_addr_t 971 snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs) 972 { 973 struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream); 974 return snd_sgbuf_get_addr(sg, ofs); 975 } 976 977 static inline void * 978 snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs) 979 { 980 struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream); 981 return snd_sgbuf_get_ptr(sg, ofs); 982 } 983 984 struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream, 985 unsigned long offset); 986 unsigned int snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream, 987 unsigned int ofs, unsigned int size); 988 989 #else /* !SND_DMA_SGBUF */ 990 /* 991 * fake using a continuous buffer 992 */ 993 static inline dma_addr_t 994 snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs) 995 { 996 return substream->runtime->dma_addr + ofs; 997 } 998 999 static inline void * 1000 snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs) 1001 { 1002 return substream->runtime->dma_area + ofs; 1003 } 1004 1005 #define snd_pcm_sgbuf_ops_page NULL 1006 1007 #define snd_pcm_sgbuf_get_chunk_size(subs, ofs, size) (size) 1008 1009 #endif /* SND_DMA_SGBUF */ 1010 1011 /* handle mmap counter - PCM mmap callback should handle this counter properly */ 1012 static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area) 1013 { 1014 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; 1015 atomic_inc(&substream->mmap_count); 1016 } 1017 1018 static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area) 1019 { 1020 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; 1021 atomic_dec(&substream->mmap_count); 1022 } 1023 1024 /* mmap for io-memory area */ 1025 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) 1026 #define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP 1027 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area); 1028 #else 1029 #define SNDRV_PCM_INFO_MMAP_IOMEM 0 1030 #define snd_pcm_lib_mmap_iomem NULL 1031 #endif 1032 1033 int snd_pcm_lib_mmap_noncached(struct snd_pcm_substream *substream, 1034 struct vm_area_struct *area); 1035 #define snd_pcm_lib_mmap_vmalloc snd_pcm_lib_mmap_noncached 1036 1037 static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max) 1038 { 1039 *max = dma < 4 ? 64 * 1024 : 128 * 1024; 1040 } 1041 1042 /* 1043 * Misc 1044 */ 1045 1046 #define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\ 1047 (IEC958_AES1_CON_ORIGINAL<<8)|\ 1048 (IEC958_AES1_CON_PCM_CODER<<8)|\ 1049 (IEC958_AES3_CON_FS_48000<<24)) 1050 1051 #define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime) 1052 1053 const char *snd_pcm_format_name(snd_pcm_format_t format); 1054 1055 #endif /* __SOUND_PCM_H */ 1056