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