1 /* 2 * Digital Audio (PCM) abstract layer 3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 4 * 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 * 20 */ 21 22 #include <linux/mm.h> 23 #include <linux/module.h> 24 #include <linux/file.h> 25 #include <linux/slab.h> 26 #include <linux/time.h> 27 #include <linux/pm_qos.h> 28 #include <linux/aio.h> 29 #include <linux/io.h> 30 #include <linux/dma-mapping.h> 31 #include <sound/core.h> 32 #include <sound/control.h> 33 #include <sound/info.h> 34 #include <sound/pcm.h> 35 #include <sound/pcm_params.h> 36 #include <sound/timer.h> 37 #include <sound/minors.h> 38 39 /* 40 * Compatibility 41 */ 42 43 struct snd_pcm_hw_params_old { 44 unsigned int flags; 45 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT - 46 SNDRV_PCM_HW_PARAM_ACCESS + 1]; 47 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME - 48 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1]; 49 unsigned int rmask; 50 unsigned int cmask; 51 unsigned int info; 52 unsigned int msbits; 53 unsigned int rate_num; 54 unsigned int rate_den; 55 snd_pcm_uframes_t fifo_size; 56 unsigned char reserved[64]; 57 }; 58 59 #ifdef CONFIG_SND_SUPPORT_OLD_API 60 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old) 61 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old) 62 63 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, 64 struct snd_pcm_hw_params_old __user * _oparams); 65 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, 66 struct snd_pcm_hw_params_old __user * _oparams); 67 #endif 68 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream); 69 70 /* 71 * 72 */ 73 74 static DEFINE_RWLOCK(snd_pcm_link_rwlock); 75 static DECLARE_RWSEM(snd_pcm_link_rwsem); 76 77 /** 78 * snd_pcm_stream_lock - Lock the PCM stream 79 * @substream: PCM substream 80 * 81 * This locks the PCM stream's spinlock or mutex depending on the nonatomic 82 * flag of the given substream. This also takes the global link rw lock 83 * (or rw sem), too, for avoiding the race with linked streams. 84 */ 85 void snd_pcm_stream_lock(struct snd_pcm_substream *substream) 86 { 87 if (substream->pcm->nonatomic) { 88 down_read(&snd_pcm_link_rwsem); 89 mutex_lock(&substream->self_group.mutex); 90 } else { 91 read_lock(&snd_pcm_link_rwlock); 92 spin_lock(&substream->self_group.lock); 93 } 94 } 95 EXPORT_SYMBOL_GPL(snd_pcm_stream_lock); 96 97 /** 98 * snd_pcm_stream_lock - Unlock the PCM stream 99 * @substream: PCM substream 100 * 101 * This unlocks the PCM stream that has been locked via snd_pcm_stream_lock(). 102 */ 103 void snd_pcm_stream_unlock(struct snd_pcm_substream *substream) 104 { 105 if (substream->pcm->nonatomic) { 106 mutex_unlock(&substream->self_group.mutex); 107 up_read(&snd_pcm_link_rwsem); 108 } else { 109 spin_unlock(&substream->self_group.lock); 110 read_unlock(&snd_pcm_link_rwlock); 111 } 112 } 113 EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock); 114 115 /** 116 * snd_pcm_stream_lock_irq - Lock the PCM stream 117 * @substream: PCM substream 118 * 119 * This locks the PCM stream like snd_pcm_stream_lock() and disables the local 120 * IRQ (only when nonatomic is false). In nonatomic case, this is identical 121 * as snd_pcm_stream_lock(). 122 */ 123 void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream) 124 { 125 if (!substream->pcm->nonatomic) 126 local_irq_disable(); 127 snd_pcm_stream_lock(substream); 128 } 129 EXPORT_SYMBOL_GPL(snd_pcm_stream_lock_irq); 130 131 /** 132 * snd_pcm_stream_unlock_irq - Unlock the PCM stream 133 * @substream: PCM substream 134 * 135 * This is a counter-part of snd_pcm_stream_lock_irq(). 136 */ 137 void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream) 138 { 139 snd_pcm_stream_unlock(substream); 140 if (!substream->pcm->nonatomic) 141 local_irq_enable(); 142 } 143 EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irq); 144 145 unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream) 146 { 147 unsigned long flags = 0; 148 if (!substream->pcm->nonatomic) 149 local_irq_save(flags); 150 snd_pcm_stream_lock(substream); 151 return flags; 152 } 153 EXPORT_SYMBOL_GPL(_snd_pcm_stream_lock_irqsave); 154 155 /** 156 * snd_pcm_stream_unlock_irqrestore - Unlock the PCM stream 157 * @substream: PCM substream 158 * @flags: irq flags 159 * 160 * This is a counter-part of snd_pcm_stream_lock_irqsave(). 161 */ 162 void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream, 163 unsigned long flags) 164 { 165 snd_pcm_stream_unlock(substream); 166 if (!substream->pcm->nonatomic) 167 local_irq_restore(flags); 168 } 169 EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irqrestore); 170 171 static inline mm_segment_t snd_enter_user(void) 172 { 173 mm_segment_t fs = get_fs(); 174 set_fs(get_ds()); 175 return fs; 176 } 177 178 static inline void snd_leave_user(mm_segment_t fs) 179 { 180 set_fs(fs); 181 } 182 183 184 185 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info) 186 { 187 struct snd_pcm_runtime *runtime; 188 struct snd_pcm *pcm = substream->pcm; 189 struct snd_pcm_str *pstr = substream->pstr; 190 191 memset(info, 0, sizeof(*info)); 192 info->card = pcm->card->number; 193 info->device = pcm->device; 194 info->stream = substream->stream; 195 info->subdevice = substream->number; 196 strlcpy(info->id, pcm->id, sizeof(info->id)); 197 strlcpy(info->name, pcm->name, sizeof(info->name)); 198 info->dev_class = pcm->dev_class; 199 info->dev_subclass = pcm->dev_subclass; 200 info->subdevices_count = pstr->substream_count; 201 info->subdevices_avail = pstr->substream_count - pstr->substream_opened; 202 strlcpy(info->subname, substream->name, sizeof(info->subname)); 203 runtime = substream->runtime; 204 /* AB: FIXME!!! This is definitely nonsense */ 205 if (runtime) { 206 info->sync = runtime->sync; 207 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info); 208 } 209 return 0; 210 } 211 212 int snd_pcm_info_user(struct snd_pcm_substream *substream, 213 struct snd_pcm_info __user * _info) 214 { 215 struct snd_pcm_info *info; 216 int err; 217 218 info = kmalloc(sizeof(*info), GFP_KERNEL); 219 if (! info) 220 return -ENOMEM; 221 err = snd_pcm_info(substream, info); 222 if (err >= 0) { 223 if (copy_to_user(_info, info, sizeof(*info))) 224 err = -EFAULT; 225 } 226 kfree(info); 227 return err; 228 } 229 230 static bool hw_support_mmap(struct snd_pcm_substream *substream) 231 { 232 if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_MMAP)) 233 return false; 234 /* check architectures that return -EINVAL from dma_mmap_coherent() */ 235 /* FIXME: this should be some global flag */ 236 #if defined(CONFIG_C6X) || defined(CONFIG_FRV) || defined(CONFIG_MN10300) ||\ 237 defined(CONFIG_PARISC) || defined(CONFIG_XTENSA) 238 if (!substream->ops->mmap && 239 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) 240 return false; 241 #endif 242 return true; 243 } 244 245 #undef RULES_DEBUG 246 247 #ifdef RULES_DEBUG 248 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v 249 static const char * const snd_pcm_hw_param_names[] = { 250 HW_PARAM(ACCESS), 251 HW_PARAM(FORMAT), 252 HW_PARAM(SUBFORMAT), 253 HW_PARAM(SAMPLE_BITS), 254 HW_PARAM(FRAME_BITS), 255 HW_PARAM(CHANNELS), 256 HW_PARAM(RATE), 257 HW_PARAM(PERIOD_TIME), 258 HW_PARAM(PERIOD_SIZE), 259 HW_PARAM(PERIOD_BYTES), 260 HW_PARAM(PERIODS), 261 HW_PARAM(BUFFER_TIME), 262 HW_PARAM(BUFFER_SIZE), 263 HW_PARAM(BUFFER_BYTES), 264 HW_PARAM(TICK_TIME), 265 }; 266 #endif 267 268 int snd_pcm_hw_refine(struct snd_pcm_substream *substream, 269 struct snd_pcm_hw_params *params) 270 { 271 unsigned int k; 272 struct snd_pcm_hardware *hw; 273 struct snd_interval *i = NULL; 274 struct snd_mask *m = NULL; 275 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints; 276 unsigned int rstamps[constrs->rules_num]; 277 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1]; 278 unsigned int stamp = 2; 279 int changed, again; 280 281 params->info = 0; 282 params->fifo_size = 0; 283 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS)) 284 params->msbits = 0; 285 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) { 286 params->rate_num = 0; 287 params->rate_den = 0; 288 } 289 290 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { 291 m = hw_param_mask(params, k); 292 if (snd_mask_empty(m)) 293 return -EINVAL; 294 if (!(params->rmask & (1 << k))) 295 continue; 296 #ifdef RULES_DEBUG 297 pr_debug("%s = ", snd_pcm_hw_param_names[k]); 298 pr_cont("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); 299 #endif 300 changed = snd_mask_refine(m, constrs_mask(constrs, k)); 301 #ifdef RULES_DEBUG 302 pr_cont("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); 303 #endif 304 if (changed) 305 params->cmask |= 1 << k; 306 if (changed < 0) 307 return changed; 308 } 309 310 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { 311 i = hw_param_interval(params, k); 312 if (snd_interval_empty(i)) 313 return -EINVAL; 314 if (!(params->rmask & (1 << k))) 315 continue; 316 #ifdef RULES_DEBUG 317 pr_debug("%s = ", snd_pcm_hw_param_names[k]); 318 if (i->empty) 319 pr_cont("empty"); 320 else 321 pr_cont("%c%u %u%c", 322 i->openmin ? '(' : '[', i->min, 323 i->max, i->openmax ? ')' : ']'); 324 pr_cont(" -> "); 325 #endif 326 changed = snd_interval_refine(i, constrs_interval(constrs, k)); 327 #ifdef RULES_DEBUG 328 if (i->empty) 329 pr_cont("empty\n"); 330 else 331 pr_cont("%c%u %u%c\n", 332 i->openmin ? '(' : '[', i->min, 333 i->max, i->openmax ? ')' : ']'); 334 #endif 335 if (changed) 336 params->cmask |= 1 << k; 337 if (changed < 0) 338 return changed; 339 } 340 341 for (k = 0; k < constrs->rules_num; k++) 342 rstamps[k] = 0; 343 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) 344 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0; 345 do { 346 again = 0; 347 for (k = 0; k < constrs->rules_num; k++) { 348 struct snd_pcm_hw_rule *r = &constrs->rules[k]; 349 unsigned int d; 350 int doit = 0; 351 if (r->cond && !(r->cond & params->flags)) 352 continue; 353 for (d = 0; r->deps[d] >= 0; d++) { 354 if (vstamps[r->deps[d]] > rstamps[k]) { 355 doit = 1; 356 break; 357 } 358 } 359 if (!doit) 360 continue; 361 #ifdef RULES_DEBUG 362 pr_debug("Rule %d [%p]: ", k, r->func); 363 if (r->var >= 0) { 364 pr_cont("%s = ", snd_pcm_hw_param_names[r->var]); 365 if (hw_is_mask(r->var)) { 366 m = hw_param_mask(params, r->var); 367 pr_cont("%x", *m->bits); 368 } else { 369 i = hw_param_interval(params, r->var); 370 if (i->empty) 371 pr_cont("empty"); 372 else 373 pr_cont("%c%u %u%c", 374 i->openmin ? '(' : '[', i->min, 375 i->max, i->openmax ? ')' : ']'); 376 } 377 } 378 #endif 379 changed = r->func(params, r); 380 #ifdef RULES_DEBUG 381 if (r->var >= 0) { 382 pr_cont(" -> "); 383 if (hw_is_mask(r->var)) 384 pr_cont("%x", *m->bits); 385 else { 386 if (i->empty) 387 pr_cont("empty"); 388 else 389 pr_cont("%c%u %u%c", 390 i->openmin ? '(' : '[', i->min, 391 i->max, i->openmax ? ')' : ']'); 392 } 393 } 394 pr_cont("\n"); 395 #endif 396 rstamps[k] = stamp; 397 if (changed && r->var >= 0) { 398 params->cmask |= (1 << r->var); 399 vstamps[r->var] = stamp; 400 again = 1; 401 } 402 if (changed < 0) 403 return changed; 404 stamp++; 405 } 406 } while (again); 407 if (!params->msbits) { 408 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); 409 if (snd_interval_single(i)) 410 params->msbits = snd_interval_value(i); 411 } 412 413 if (!params->rate_den) { 414 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); 415 if (snd_interval_single(i)) { 416 params->rate_num = snd_interval_value(i); 417 params->rate_den = 1; 418 } 419 } 420 421 hw = &substream->runtime->hw; 422 if (!params->info) { 423 params->info = hw->info & ~(SNDRV_PCM_INFO_FIFO_IN_FRAMES | 424 SNDRV_PCM_INFO_DRAIN_TRIGGER); 425 if (!hw_support_mmap(substream)) 426 params->info &= ~(SNDRV_PCM_INFO_MMAP | 427 SNDRV_PCM_INFO_MMAP_VALID); 428 } 429 if (!params->fifo_size) { 430 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 431 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 432 if (snd_mask_min(m) == snd_mask_max(m) && 433 snd_interval_min(i) == snd_interval_max(i)) { 434 changed = substream->ops->ioctl(substream, 435 SNDRV_PCM_IOCTL1_FIFO_SIZE, params); 436 if (changed < 0) 437 return changed; 438 } 439 } 440 params->rmask = 0; 441 return 0; 442 } 443 444 EXPORT_SYMBOL(snd_pcm_hw_refine); 445 446 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream, 447 struct snd_pcm_hw_params __user * _params) 448 { 449 struct snd_pcm_hw_params *params; 450 int err; 451 452 params = memdup_user(_params, sizeof(*params)); 453 if (IS_ERR(params)) 454 return PTR_ERR(params); 455 456 err = snd_pcm_hw_refine(substream, params); 457 if (copy_to_user(_params, params, sizeof(*params))) { 458 if (!err) 459 err = -EFAULT; 460 } 461 462 kfree(params); 463 return err; 464 } 465 466 static int period_to_usecs(struct snd_pcm_runtime *runtime) 467 { 468 int usecs; 469 470 if (! runtime->rate) 471 return -1; /* invalid */ 472 473 /* take 75% of period time as the deadline */ 474 usecs = (750000 / runtime->rate) * runtime->period_size; 475 usecs += ((750000 % runtime->rate) * runtime->period_size) / 476 runtime->rate; 477 478 return usecs; 479 } 480 481 static void snd_pcm_set_state(struct snd_pcm_substream *substream, int state) 482 { 483 snd_pcm_stream_lock_irq(substream); 484 if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED) 485 substream->runtime->status->state = state; 486 snd_pcm_stream_unlock_irq(substream); 487 } 488 489 static int snd_pcm_hw_params(struct snd_pcm_substream *substream, 490 struct snd_pcm_hw_params *params) 491 { 492 struct snd_pcm_runtime *runtime; 493 int err, usecs; 494 unsigned int bits; 495 snd_pcm_uframes_t frames; 496 497 if (PCM_RUNTIME_CHECK(substream)) 498 return -ENXIO; 499 runtime = substream->runtime; 500 snd_pcm_stream_lock_irq(substream); 501 switch (runtime->status->state) { 502 case SNDRV_PCM_STATE_OPEN: 503 case SNDRV_PCM_STATE_SETUP: 504 case SNDRV_PCM_STATE_PREPARED: 505 break; 506 default: 507 snd_pcm_stream_unlock_irq(substream); 508 return -EBADFD; 509 } 510 snd_pcm_stream_unlock_irq(substream); 511 #if IS_ENABLED(CONFIG_SND_PCM_OSS) 512 if (!substream->oss.oss) 513 #endif 514 if (atomic_read(&substream->mmap_count)) 515 return -EBADFD; 516 517 params->rmask = ~0U; 518 err = snd_pcm_hw_refine(substream, params); 519 if (err < 0) 520 goto _error; 521 522 err = snd_pcm_hw_params_choose(substream, params); 523 if (err < 0) 524 goto _error; 525 526 if (substream->ops->hw_params != NULL) { 527 err = substream->ops->hw_params(substream, params); 528 if (err < 0) 529 goto _error; 530 } 531 532 runtime->access = params_access(params); 533 runtime->format = params_format(params); 534 runtime->subformat = params_subformat(params); 535 runtime->channels = params_channels(params); 536 runtime->rate = params_rate(params); 537 runtime->period_size = params_period_size(params); 538 runtime->periods = params_periods(params); 539 runtime->buffer_size = params_buffer_size(params); 540 runtime->info = params->info; 541 runtime->rate_num = params->rate_num; 542 runtime->rate_den = params->rate_den; 543 runtime->no_period_wakeup = 544 (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) && 545 (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP); 546 547 bits = snd_pcm_format_physical_width(runtime->format); 548 runtime->sample_bits = bits; 549 bits *= runtime->channels; 550 runtime->frame_bits = bits; 551 frames = 1; 552 while (bits % 8 != 0) { 553 bits *= 2; 554 frames *= 2; 555 } 556 runtime->byte_align = bits / 8; 557 runtime->min_align = frames; 558 559 /* Default sw params */ 560 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; 561 runtime->period_step = 1; 562 runtime->control->avail_min = runtime->period_size; 563 runtime->start_threshold = 1; 564 runtime->stop_threshold = runtime->buffer_size; 565 runtime->silence_threshold = 0; 566 runtime->silence_size = 0; 567 runtime->boundary = runtime->buffer_size; 568 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size) 569 runtime->boundary *= 2; 570 571 snd_pcm_timer_resolution_change(substream); 572 snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP); 573 574 if (pm_qos_request_active(&substream->latency_pm_qos_req)) 575 pm_qos_remove_request(&substream->latency_pm_qos_req); 576 if ((usecs = period_to_usecs(runtime)) >= 0) 577 pm_qos_add_request(&substream->latency_pm_qos_req, 578 PM_QOS_CPU_DMA_LATENCY, usecs); 579 return 0; 580 _error: 581 /* hardware might be unusable from this time, 582 so we force application to retry to set 583 the correct hardware parameter settings */ 584 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN); 585 if (substream->ops->hw_free != NULL) 586 substream->ops->hw_free(substream); 587 return err; 588 } 589 590 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream, 591 struct snd_pcm_hw_params __user * _params) 592 { 593 struct snd_pcm_hw_params *params; 594 int err; 595 596 params = memdup_user(_params, sizeof(*params)); 597 if (IS_ERR(params)) 598 return PTR_ERR(params); 599 600 err = snd_pcm_hw_params(substream, params); 601 if (copy_to_user(_params, params, sizeof(*params))) { 602 if (!err) 603 err = -EFAULT; 604 } 605 606 kfree(params); 607 return err; 608 } 609 610 static int snd_pcm_hw_free(struct snd_pcm_substream *substream) 611 { 612 struct snd_pcm_runtime *runtime; 613 int result = 0; 614 615 if (PCM_RUNTIME_CHECK(substream)) 616 return -ENXIO; 617 runtime = substream->runtime; 618 snd_pcm_stream_lock_irq(substream); 619 switch (runtime->status->state) { 620 case SNDRV_PCM_STATE_SETUP: 621 case SNDRV_PCM_STATE_PREPARED: 622 break; 623 default: 624 snd_pcm_stream_unlock_irq(substream); 625 return -EBADFD; 626 } 627 snd_pcm_stream_unlock_irq(substream); 628 if (atomic_read(&substream->mmap_count)) 629 return -EBADFD; 630 if (substream->ops->hw_free) 631 result = substream->ops->hw_free(substream); 632 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN); 633 pm_qos_remove_request(&substream->latency_pm_qos_req); 634 return result; 635 } 636 637 static int snd_pcm_sw_params(struct snd_pcm_substream *substream, 638 struct snd_pcm_sw_params *params) 639 { 640 struct snd_pcm_runtime *runtime; 641 int err; 642 643 if (PCM_RUNTIME_CHECK(substream)) 644 return -ENXIO; 645 runtime = substream->runtime; 646 snd_pcm_stream_lock_irq(substream); 647 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 648 snd_pcm_stream_unlock_irq(substream); 649 return -EBADFD; 650 } 651 snd_pcm_stream_unlock_irq(substream); 652 653 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST) 654 return -EINVAL; 655 if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12) && 656 params->tstamp_type > SNDRV_PCM_TSTAMP_TYPE_LAST) 657 return -EINVAL; 658 if (params->avail_min == 0) 659 return -EINVAL; 660 if (params->silence_size >= runtime->boundary) { 661 if (params->silence_threshold != 0) 662 return -EINVAL; 663 } else { 664 if (params->silence_size > params->silence_threshold) 665 return -EINVAL; 666 if (params->silence_threshold > runtime->buffer_size) 667 return -EINVAL; 668 } 669 err = 0; 670 snd_pcm_stream_lock_irq(substream); 671 runtime->tstamp_mode = params->tstamp_mode; 672 if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12)) 673 runtime->tstamp_type = params->tstamp_type; 674 runtime->period_step = params->period_step; 675 runtime->control->avail_min = params->avail_min; 676 runtime->start_threshold = params->start_threshold; 677 runtime->stop_threshold = params->stop_threshold; 678 runtime->silence_threshold = params->silence_threshold; 679 runtime->silence_size = params->silence_size; 680 params->boundary = runtime->boundary; 681 if (snd_pcm_running(substream)) { 682 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 683 runtime->silence_size > 0) 684 snd_pcm_playback_silence(substream, ULONG_MAX); 685 err = snd_pcm_update_state(substream, runtime); 686 } 687 snd_pcm_stream_unlock_irq(substream); 688 return err; 689 } 690 691 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream, 692 struct snd_pcm_sw_params __user * _params) 693 { 694 struct snd_pcm_sw_params params; 695 int err; 696 if (copy_from_user(¶ms, _params, sizeof(params))) 697 return -EFAULT; 698 err = snd_pcm_sw_params(substream, ¶ms); 699 if (copy_to_user(_params, ¶ms, sizeof(params))) 700 return -EFAULT; 701 return err; 702 } 703 704 int snd_pcm_status(struct snd_pcm_substream *substream, 705 struct snd_pcm_status *status) 706 { 707 struct snd_pcm_runtime *runtime = substream->runtime; 708 709 snd_pcm_stream_lock_irq(substream); 710 status->state = runtime->status->state; 711 status->suspended_state = runtime->status->suspended_state; 712 if (status->state == SNDRV_PCM_STATE_OPEN) 713 goto _end; 714 status->trigger_tstamp = runtime->trigger_tstamp; 715 if (snd_pcm_running(substream)) { 716 snd_pcm_update_hw_ptr(substream); 717 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { 718 status->tstamp = runtime->status->tstamp; 719 status->audio_tstamp = 720 runtime->status->audio_tstamp; 721 goto _tstamp_end; 722 } 723 } else { 724 /* get tstamp only in fallback mode and only if enabled */ 725 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) 726 snd_pcm_gettime(runtime, &status->tstamp); 727 } 728 _tstamp_end: 729 status->appl_ptr = runtime->control->appl_ptr; 730 status->hw_ptr = runtime->status->hw_ptr; 731 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 732 status->avail = snd_pcm_playback_avail(runtime); 733 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING || 734 runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 735 status->delay = runtime->buffer_size - status->avail; 736 status->delay += runtime->delay; 737 } else 738 status->delay = 0; 739 } else { 740 status->avail = snd_pcm_capture_avail(runtime); 741 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) 742 status->delay = status->avail + runtime->delay; 743 else 744 status->delay = 0; 745 } 746 status->avail_max = runtime->avail_max; 747 status->overrange = runtime->overrange; 748 runtime->avail_max = 0; 749 runtime->overrange = 0; 750 _end: 751 snd_pcm_stream_unlock_irq(substream); 752 return 0; 753 } 754 755 static int snd_pcm_status_user(struct snd_pcm_substream *substream, 756 struct snd_pcm_status __user * _status) 757 { 758 struct snd_pcm_status status; 759 int res; 760 761 memset(&status, 0, sizeof(status)); 762 res = snd_pcm_status(substream, &status); 763 if (res < 0) 764 return res; 765 if (copy_to_user(_status, &status, sizeof(status))) 766 return -EFAULT; 767 return 0; 768 } 769 770 static int snd_pcm_channel_info(struct snd_pcm_substream *substream, 771 struct snd_pcm_channel_info * info) 772 { 773 struct snd_pcm_runtime *runtime; 774 unsigned int channel; 775 776 channel = info->channel; 777 runtime = substream->runtime; 778 snd_pcm_stream_lock_irq(substream); 779 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 780 snd_pcm_stream_unlock_irq(substream); 781 return -EBADFD; 782 } 783 snd_pcm_stream_unlock_irq(substream); 784 if (channel >= runtime->channels) 785 return -EINVAL; 786 memset(info, 0, sizeof(*info)); 787 info->channel = channel; 788 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info); 789 } 790 791 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream, 792 struct snd_pcm_channel_info __user * _info) 793 { 794 struct snd_pcm_channel_info info; 795 int res; 796 797 if (copy_from_user(&info, _info, sizeof(info))) 798 return -EFAULT; 799 res = snd_pcm_channel_info(substream, &info); 800 if (res < 0) 801 return res; 802 if (copy_to_user(_info, &info, sizeof(info))) 803 return -EFAULT; 804 return 0; 805 } 806 807 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream) 808 { 809 struct snd_pcm_runtime *runtime = substream->runtime; 810 if (runtime->trigger_master == NULL) 811 return; 812 if (runtime->trigger_master == substream) { 813 if (!runtime->trigger_tstamp_latched) 814 snd_pcm_gettime(runtime, &runtime->trigger_tstamp); 815 } else { 816 snd_pcm_trigger_tstamp(runtime->trigger_master); 817 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp; 818 } 819 runtime->trigger_master = NULL; 820 } 821 822 struct action_ops { 823 int (*pre_action)(struct snd_pcm_substream *substream, int state); 824 int (*do_action)(struct snd_pcm_substream *substream, int state); 825 void (*undo_action)(struct snd_pcm_substream *substream, int state); 826 void (*post_action)(struct snd_pcm_substream *substream, int state); 827 }; 828 829 /* 830 * this functions is core for handling of linked stream 831 * Note: the stream state might be changed also on failure 832 * Note2: call with calling stream lock + link lock 833 */ 834 static int snd_pcm_action_group(struct action_ops *ops, 835 struct snd_pcm_substream *substream, 836 int state, int do_lock) 837 { 838 struct snd_pcm_substream *s = NULL; 839 struct snd_pcm_substream *s1; 840 int res = 0, depth = 1; 841 842 snd_pcm_group_for_each_entry(s, substream) { 843 if (do_lock && s != substream) { 844 if (s->pcm->nonatomic) 845 mutex_lock_nested(&s->self_group.mutex, depth); 846 else 847 spin_lock_nested(&s->self_group.lock, depth); 848 depth++; 849 } 850 res = ops->pre_action(s, state); 851 if (res < 0) 852 goto _unlock; 853 } 854 snd_pcm_group_for_each_entry(s, substream) { 855 res = ops->do_action(s, state); 856 if (res < 0) { 857 if (ops->undo_action) { 858 snd_pcm_group_for_each_entry(s1, substream) { 859 if (s1 == s) /* failed stream */ 860 break; 861 ops->undo_action(s1, state); 862 } 863 } 864 s = NULL; /* unlock all */ 865 goto _unlock; 866 } 867 } 868 snd_pcm_group_for_each_entry(s, substream) { 869 ops->post_action(s, state); 870 } 871 _unlock: 872 if (do_lock) { 873 /* unlock streams */ 874 snd_pcm_group_for_each_entry(s1, substream) { 875 if (s1 != substream) { 876 if (s1->pcm->nonatomic) 877 mutex_unlock(&s1->self_group.mutex); 878 else 879 spin_unlock(&s1->self_group.lock); 880 } 881 if (s1 == s) /* end */ 882 break; 883 } 884 } 885 return res; 886 } 887 888 /* 889 * Note: call with stream lock 890 */ 891 static int snd_pcm_action_single(struct action_ops *ops, 892 struct snd_pcm_substream *substream, 893 int state) 894 { 895 int res; 896 897 res = ops->pre_action(substream, state); 898 if (res < 0) 899 return res; 900 res = ops->do_action(substream, state); 901 if (res == 0) 902 ops->post_action(substream, state); 903 else if (ops->undo_action) 904 ops->undo_action(substream, state); 905 return res; 906 } 907 908 /* 909 * Note: call with stream lock 910 */ 911 static int snd_pcm_action(struct action_ops *ops, 912 struct snd_pcm_substream *substream, 913 int state) 914 { 915 int res; 916 917 if (!snd_pcm_stream_linked(substream)) 918 return snd_pcm_action_single(ops, substream, state); 919 920 if (substream->pcm->nonatomic) { 921 if (!mutex_trylock(&substream->group->mutex)) { 922 mutex_unlock(&substream->self_group.mutex); 923 mutex_lock(&substream->group->mutex); 924 mutex_lock(&substream->self_group.mutex); 925 } 926 res = snd_pcm_action_group(ops, substream, state, 1); 927 mutex_unlock(&substream->group->mutex); 928 } else { 929 if (!spin_trylock(&substream->group->lock)) { 930 spin_unlock(&substream->self_group.lock); 931 spin_lock(&substream->group->lock); 932 spin_lock(&substream->self_group.lock); 933 } 934 res = snd_pcm_action_group(ops, substream, state, 1); 935 spin_unlock(&substream->group->lock); 936 } 937 return res; 938 } 939 940 /* 941 * Note: don't use any locks before 942 */ 943 static int snd_pcm_action_lock_irq(struct action_ops *ops, 944 struct snd_pcm_substream *substream, 945 int state) 946 { 947 int res; 948 949 snd_pcm_stream_lock_irq(substream); 950 res = snd_pcm_action(ops, substream, state); 951 snd_pcm_stream_unlock_irq(substream); 952 return res; 953 } 954 955 /* 956 */ 957 static int snd_pcm_action_nonatomic(struct action_ops *ops, 958 struct snd_pcm_substream *substream, 959 int state) 960 { 961 int res; 962 963 down_read(&snd_pcm_link_rwsem); 964 if (snd_pcm_stream_linked(substream)) 965 res = snd_pcm_action_group(ops, substream, state, 0); 966 else 967 res = snd_pcm_action_single(ops, substream, state); 968 up_read(&snd_pcm_link_rwsem); 969 return res; 970 } 971 972 /* 973 * start callbacks 974 */ 975 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state) 976 { 977 struct snd_pcm_runtime *runtime = substream->runtime; 978 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED) 979 return -EBADFD; 980 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 981 !snd_pcm_playback_data(substream)) 982 return -EPIPE; 983 runtime->trigger_tstamp_latched = false; 984 runtime->trigger_master = substream; 985 return 0; 986 } 987 988 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state) 989 { 990 if (substream->runtime->trigger_master != substream) 991 return 0; 992 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START); 993 } 994 995 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state) 996 { 997 if (substream->runtime->trigger_master == substream) 998 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); 999 } 1000 1001 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state) 1002 { 1003 struct snd_pcm_runtime *runtime = substream->runtime; 1004 snd_pcm_trigger_tstamp(substream); 1005 runtime->hw_ptr_jiffies = jiffies; 1006 runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) / 1007 runtime->rate; 1008 runtime->status->state = state; 1009 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 1010 runtime->silence_size > 0) 1011 snd_pcm_playback_silence(substream, ULONG_MAX); 1012 if (substream->timer) 1013 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART, 1014 &runtime->trigger_tstamp); 1015 } 1016 1017 static struct action_ops snd_pcm_action_start = { 1018 .pre_action = snd_pcm_pre_start, 1019 .do_action = snd_pcm_do_start, 1020 .undo_action = snd_pcm_undo_start, 1021 .post_action = snd_pcm_post_start 1022 }; 1023 1024 /** 1025 * snd_pcm_start - start all linked streams 1026 * @substream: the PCM substream instance 1027 * 1028 * Return: Zero if successful, or a negative error code. 1029 */ 1030 int snd_pcm_start(struct snd_pcm_substream *substream) 1031 { 1032 return snd_pcm_action(&snd_pcm_action_start, substream, 1033 SNDRV_PCM_STATE_RUNNING); 1034 } 1035 1036 /* 1037 * stop callbacks 1038 */ 1039 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state) 1040 { 1041 struct snd_pcm_runtime *runtime = substream->runtime; 1042 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 1043 return -EBADFD; 1044 runtime->trigger_master = substream; 1045 return 0; 1046 } 1047 1048 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state) 1049 { 1050 if (substream->runtime->trigger_master == substream && 1051 snd_pcm_running(substream)) 1052 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); 1053 return 0; /* unconditonally stop all substreams */ 1054 } 1055 1056 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state) 1057 { 1058 struct snd_pcm_runtime *runtime = substream->runtime; 1059 if (runtime->status->state != state) { 1060 snd_pcm_trigger_tstamp(substream); 1061 runtime->status->state = state; 1062 if (substream->timer) 1063 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP, 1064 &runtime->trigger_tstamp); 1065 } 1066 wake_up(&runtime->sleep); 1067 wake_up(&runtime->tsleep); 1068 } 1069 1070 static struct action_ops snd_pcm_action_stop = { 1071 .pre_action = snd_pcm_pre_stop, 1072 .do_action = snd_pcm_do_stop, 1073 .post_action = snd_pcm_post_stop 1074 }; 1075 1076 /** 1077 * snd_pcm_stop - try to stop all running streams in the substream group 1078 * @substream: the PCM substream instance 1079 * @state: PCM state after stopping the stream 1080 * 1081 * The state of each stream is then changed to the given state unconditionally. 1082 * 1083 * Return: Zero if successful, or a negative error code. 1084 */ 1085 int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state) 1086 { 1087 return snd_pcm_action(&snd_pcm_action_stop, substream, state); 1088 } 1089 1090 EXPORT_SYMBOL(snd_pcm_stop); 1091 1092 /** 1093 * snd_pcm_drain_done - stop the DMA only when the given stream is playback 1094 * @substream: the PCM substream 1095 * 1096 * After stopping, the state is changed to SETUP. 1097 * Unlike snd_pcm_stop(), this affects only the given stream. 1098 * 1099 * Return: Zero if succesful, or a negative error code. 1100 */ 1101 int snd_pcm_drain_done(struct snd_pcm_substream *substream) 1102 { 1103 return snd_pcm_action_single(&snd_pcm_action_stop, substream, 1104 SNDRV_PCM_STATE_SETUP); 1105 } 1106 1107 /** 1108 * snd_pcm_stop_xrun - stop the running streams as XRUN 1109 * @substream: the PCM substream instance 1110 * 1111 * This stops the given running substream (and all linked substreams) as XRUN. 1112 * Unlike snd_pcm_stop(), this function takes the substream lock by itself. 1113 * 1114 * Return: Zero if successful, or a negative error code. 1115 */ 1116 int snd_pcm_stop_xrun(struct snd_pcm_substream *substream) 1117 { 1118 unsigned long flags; 1119 int ret = 0; 1120 1121 snd_pcm_stream_lock_irqsave(substream, flags); 1122 if (snd_pcm_running(substream)) 1123 ret = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); 1124 snd_pcm_stream_unlock_irqrestore(substream, flags); 1125 return ret; 1126 } 1127 EXPORT_SYMBOL_GPL(snd_pcm_stop_xrun); 1128 1129 /* 1130 * pause callbacks 1131 */ 1132 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push) 1133 { 1134 struct snd_pcm_runtime *runtime = substream->runtime; 1135 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE)) 1136 return -ENOSYS; 1137 if (push) { 1138 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING) 1139 return -EBADFD; 1140 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED) 1141 return -EBADFD; 1142 runtime->trigger_master = substream; 1143 return 0; 1144 } 1145 1146 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push) 1147 { 1148 if (substream->runtime->trigger_master != substream) 1149 return 0; 1150 /* some drivers might use hw_ptr to recover from the pause - 1151 update the hw_ptr now */ 1152 if (push) 1153 snd_pcm_update_hw_ptr(substream); 1154 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by 1155 * a delta between the current jiffies, this gives a large enough 1156 * delta, effectively to skip the check once. 1157 */ 1158 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000; 1159 return substream->ops->trigger(substream, 1160 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH : 1161 SNDRV_PCM_TRIGGER_PAUSE_RELEASE); 1162 } 1163 1164 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push) 1165 { 1166 if (substream->runtime->trigger_master == substream) 1167 substream->ops->trigger(substream, 1168 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE : 1169 SNDRV_PCM_TRIGGER_PAUSE_PUSH); 1170 } 1171 1172 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push) 1173 { 1174 struct snd_pcm_runtime *runtime = substream->runtime; 1175 snd_pcm_trigger_tstamp(substream); 1176 if (push) { 1177 runtime->status->state = SNDRV_PCM_STATE_PAUSED; 1178 if (substream->timer) 1179 snd_timer_notify(substream->timer, 1180 SNDRV_TIMER_EVENT_MPAUSE, 1181 &runtime->trigger_tstamp); 1182 wake_up(&runtime->sleep); 1183 wake_up(&runtime->tsleep); 1184 } else { 1185 runtime->status->state = SNDRV_PCM_STATE_RUNNING; 1186 if (substream->timer) 1187 snd_timer_notify(substream->timer, 1188 SNDRV_TIMER_EVENT_MCONTINUE, 1189 &runtime->trigger_tstamp); 1190 } 1191 } 1192 1193 static struct action_ops snd_pcm_action_pause = { 1194 .pre_action = snd_pcm_pre_pause, 1195 .do_action = snd_pcm_do_pause, 1196 .undo_action = snd_pcm_undo_pause, 1197 .post_action = snd_pcm_post_pause 1198 }; 1199 1200 /* 1201 * Push/release the pause for all linked streams. 1202 */ 1203 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push) 1204 { 1205 return snd_pcm_action(&snd_pcm_action_pause, substream, push); 1206 } 1207 1208 #ifdef CONFIG_PM 1209 /* suspend */ 1210 1211 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state) 1212 { 1213 struct snd_pcm_runtime *runtime = substream->runtime; 1214 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1215 return -EBUSY; 1216 runtime->trigger_master = substream; 1217 return 0; 1218 } 1219 1220 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state) 1221 { 1222 struct snd_pcm_runtime *runtime = substream->runtime; 1223 if (runtime->trigger_master != substream) 1224 return 0; 1225 if (! snd_pcm_running(substream)) 1226 return 0; 1227 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); 1228 return 0; /* suspend unconditionally */ 1229 } 1230 1231 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state) 1232 { 1233 struct snd_pcm_runtime *runtime = substream->runtime; 1234 snd_pcm_trigger_tstamp(substream); 1235 runtime->status->suspended_state = runtime->status->state; 1236 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED; 1237 if (substream->timer) 1238 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND, 1239 &runtime->trigger_tstamp); 1240 wake_up(&runtime->sleep); 1241 wake_up(&runtime->tsleep); 1242 } 1243 1244 static struct action_ops snd_pcm_action_suspend = { 1245 .pre_action = snd_pcm_pre_suspend, 1246 .do_action = snd_pcm_do_suspend, 1247 .post_action = snd_pcm_post_suspend 1248 }; 1249 1250 /** 1251 * snd_pcm_suspend - trigger SUSPEND to all linked streams 1252 * @substream: the PCM substream 1253 * 1254 * After this call, all streams are changed to SUSPENDED state. 1255 * 1256 * Return: Zero if successful (or @substream is %NULL), or a negative error 1257 * code. 1258 */ 1259 int snd_pcm_suspend(struct snd_pcm_substream *substream) 1260 { 1261 int err; 1262 unsigned long flags; 1263 1264 if (! substream) 1265 return 0; 1266 1267 snd_pcm_stream_lock_irqsave(substream, flags); 1268 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0); 1269 snd_pcm_stream_unlock_irqrestore(substream, flags); 1270 return err; 1271 } 1272 1273 EXPORT_SYMBOL(snd_pcm_suspend); 1274 1275 /** 1276 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm 1277 * @pcm: the PCM instance 1278 * 1279 * After this call, all streams are changed to SUSPENDED state. 1280 * 1281 * Return: Zero if successful (or @pcm is %NULL), or a negative error code. 1282 */ 1283 int snd_pcm_suspend_all(struct snd_pcm *pcm) 1284 { 1285 struct snd_pcm_substream *substream; 1286 int stream, err = 0; 1287 1288 if (! pcm) 1289 return 0; 1290 1291 for (stream = 0; stream < 2; stream++) { 1292 for (substream = pcm->streams[stream].substream; 1293 substream; substream = substream->next) { 1294 /* FIXME: the open/close code should lock this as well */ 1295 if (substream->runtime == NULL) 1296 continue; 1297 err = snd_pcm_suspend(substream); 1298 if (err < 0 && err != -EBUSY) 1299 return err; 1300 } 1301 } 1302 return 0; 1303 } 1304 1305 EXPORT_SYMBOL(snd_pcm_suspend_all); 1306 1307 /* resume */ 1308 1309 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state) 1310 { 1311 struct snd_pcm_runtime *runtime = substream->runtime; 1312 if (!(runtime->info & SNDRV_PCM_INFO_RESUME)) 1313 return -ENOSYS; 1314 runtime->trigger_master = substream; 1315 return 0; 1316 } 1317 1318 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state) 1319 { 1320 struct snd_pcm_runtime *runtime = substream->runtime; 1321 if (runtime->trigger_master != substream) 1322 return 0; 1323 /* DMA not running previously? */ 1324 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING && 1325 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING || 1326 substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) 1327 return 0; 1328 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME); 1329 } 1330 1331 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state) 1332 { 1333 if (substream->runtime->trigger_master == substream && 1334 snd_pcm_running(substream)) 1335 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); 1336 } 1337 1338 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state) 1339 { 1340 struct snd_pcm_runtime *runtime = substream->runtime; 1341 snd_pcm_trigger_tstamp(substream); 1342 runtime->status->state = runtime->status->suspended_state; 1343 if (substream->timer) 1344 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME, 1345 &runtime->trigger_tstamp); 1346 } 1347 1348 static struct action_ops snd_pcm_action_resume = { 1349 .pre_action = snd_pcm_pre_resume, 1350 .do_action = snd_pcm_do_resume, 1351 .undo_action = snd_pcm_undo_resume, 1352 .post_action = snd_pcm_post_resume 1353 }; 1354 1355 static int snd_pcm_resume(struct snd_pcm_substream *substream) 1356 { 1357 struct snd_card *card = substream->pcm->card; 1358 int res; 1359 1360 snd_power_lock(card); 1361 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) 1362 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0); 1363 snd_power_unlock(card); 1364 return res; 1365 } 1366 1367 #else 1368 1369 static int snd_pcm_resume(struct snd_pcm_substream *substream) 1370 { 1371 return -ENOSYS; 1372 } 1373 1374 #endif /* CONFIG_PM */ 1375 1376 /* 1377 * xrun ioctl 1378 * 1379 * Change the RUNNING stream(s) to XRUN state. 1380 */ 1381 static int snd_pcm_xrun(struct snd_pcm_substream *substream) 1382 { 1383 struct snd_card *card = substream->pcm->card; 1384 struct snd_pcm_runtime *runtime = substream->runtime; 1385 int result; 1386 1387 snd_power_lock(card); 1388 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1389 result = snd_power_wait(card, SNDRV_CTL_POWER_D0); 1390 if (result < 0) 1391 goto _unlock; 1392 } 1393 1394 snd_pcm_stream_lock_irq(substream); 1395 switch (runtime->status->state) { 1396 case SNDRV_PCM_STATE_XRUN: 1397 result = 0; /* already there */ 1398 break; 1399 case SNDRV_PCM_STATE_RUNNING: 1400 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); 1401 break; 1402 default: 1403 result = -EBADFD; 1404 } 1405 snd_pcm_stream_unlock_irq(substream); 1406 _unlock: 1407 snd_power_unlock(card); 1408 return result; 1409 } 1410 1411 /* 1412 * reset ioctl 1413 */ 1414 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state) 1415 { 1416 struct snd_pcm_runtime *runtime = substream->runtime; 1417 switch (runtime->status->state) { 1418 case SNDRV_PCM_STATE_RUNNING: 1419 case SNDRV_PCM_STATE_PREPARED: 1420 case SNDRV_PCM_STATE_PAUSED: 1421 case SNDRV_PCM_STATE_SUSPENDED: 1422 return 0; 1423 default: 1424 return -EBADFD; 1425 } 1426 } 1427 1428 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state) 1429 { 1430 struct snd_pcm_runtime *runtime = substream->runtime; 1431 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL); 1432 if (err < 0) 1433 return err; 1434 runtime->hw_ptr_base = 0; 1435 runtime->hw_ptr_interrupt = runtime->status->hw_ptr - 1436 runtime->status->hw_ptr % runtime->period_size; 1437 runtime->silence_start = runtime->status->hw_ptr; 1438 runtime->silence_filled = 0; 1439 return 0; 1440 } 1441 1442 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state) 1443 { 1444 struct snd_pcm_runtime *runtime = substream->runtime; 1445 runtime->control->appl_ptr = runtime->status->hw_ptr; 1446 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 1447 runtime->silence_size > 0) 1448 snd_pcm_playback_silence(substream, ULONG_MAX); 1449 } 1450 1451 static struct action_ops snd_pcm_action_reset = { 1452 .pre_action = snd_pcm_pre_reset, 1453 .do_action = snd_pcm_do_reset, 1454 .post_action = snd_pcm_post_reset 1455 }; 1456 1457 static int snd_pcm_reset(struct snd_pcm_substream *substream) 1458 { 1459 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0); 1460 } 1461 1462 /* 1463 * prepare ioctl 1464 */ 1465 /* we use the second argument for updating f_flags */ 1466 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream, 1467 int f_flags) 1468 { 1469 struct snd_pcm_runtime *runtime = substream->runtime; 1470 if (runtime->status->state == SNDRV_PCM_STATE_OPEN || 1471 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED) 1472 return -EBADFD; 1473 if (snd_pcm_running(substream)) 1474 return -EBUSY; 1475 substream->f_flags = f_flags; 1476 return 0; 1477 } 1478 1479 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state) 1480 { 1481 int err; 1482 err = substream->ops->prepare(substream); 1483 if (err < 0) 1484 return err; 1485 return snd_pcm_do_reset(substream, 0); 1486 } 1487 1488 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state) 1489 { 1490 struct snd_pcm_runtime *runtime = substream->runtime; 1491 runtime->control->appl_ptr = runtime->status->hw_ptr; 1492 snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED); 1493 } 1494 1495 static struct action_ops snd_pcm_action_prepare = { 1496 .pre_action = snd_pcm_pre_prepare, 1497 .do_action = snd_pcm_do_prepare, 1498 .post_action = snd_pcm_post_prepare 1499 }; 1500 1501 /** 1502 * snd_pcm_prepare - prepare the PCM substream to be triggerable 1503 * @substream: the PCM substream instance 1504 * @file: file to refer f_flags 1505 * 1506 * Return: Zero if successful, or a negative error code. 1507 */ 1508 static int snd_pcm_prepare(struct snd_pcm_substream *substream, 1509 struct file *file) 1510 { 1511 int res; 1512 struct snd_card *card = substream->pcm->card; 1513 int f_flags; 1514 1515 if (file) 1516 f_flags = file->f_flags; 1517 else 1518 f_flags = substream->f_flags; 1519 1520 snd_power_lock(card); 1521 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) 1522 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare, 1523 substream, f_flags); 1524 snd_power_unlock(card); 1525 return res; 1526 } 1527 1528 /* 1529 * drain ioctl 1530 */ 1531 1532 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state) 1533 { 1534 struct snd_pcm_runtime *runtime = substream->runtime; 1535 switch (runtime->status->state) { 1536 case SNDRV_PCM_STATE_OPEN: 1537 case SNDRV_PCM_STATE_DISCONNECTED: 1538 case SNDRV_PCM_STATE_SUSPENDED: 1539 return -EBADFD; 1540 } 1541 runtime->trigger_master = substream; 1542 return 0; 1543 } 1544 1545 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state) 1546 { 1547 struct snd_pcm_runtime *runtime = substream->runtime; 1548 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 1549 switch (runtime->status->state) { 1550 case SNDRV_PCM_STATE_PREPARED: 1551 /* start playback stream if possible */ 1552 if (! snd_pcm_playback_empty(substream)) { 1553 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING); 1554 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING); 1555 } 1556 break; 1557 case SNDRV_PCM_STATE_RUNNING: 1558 runtime->status->state = SNDRV_PCM_STATE_DRAINING; 1559 break; 1560 case SNDRV_PCM_STATE_XRUN: 1561 runtime->status->state = SNDRV_PCM_STATE_SETUP; 1562 break; 1563 default: 1564 break; 1565 } 1566 } else { 1567 /* stop running stream */ 1568 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) { 1569 int new_state = snd_pcm_capture_avail(runtime) > 0 ? 1570 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP; 1571 snd_pcm_do_stop(substream, new_state); 1572 snd_pcm_post_stop(substream, new_state); 1573 } 1574 } 1575 1576 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING && 1577 runtime->trigger_master == substream && 1578 (runtime->hw.info & SNDRV_PCM_INFO_DRAIN_TRIGGER)) 1579 return substream->ops->trigger(substream, 1580 SNDRV_PCM_TRIGGER_DRAIN); 1581 1582 return 0; 1583 } 1584 1585 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state) 1586 { 1587 } 1588 1589 static struct action_ops snd_pcm_action_drain_init = { 1590 .pre_action = snd_pcm_pre_drain_init, 1591 .do_action = snd_pcm_do_drain_init, 1592 .post_action = snd_pcm_post_drain_init 1593 }; 1594 1595 static int snd_pcm_drop(struct snd_pcm_substream *substream); 1596 1597 /* 1598 * Drain the stream(s). 1599 * When the substream is linked, sync until the draining of all playback streams 1600 * is finished. 1601 * After this call, all streams are supposed to be either SETUP or DRAINING 1602 * (capture only) state. 1603 */ 1604 static int snd_pcm_drain(struct snd_pcm_substream *substream, 1605 struct file *file) 1606 { 1607 struct snd_card *card; 1608 struct snd_pcm_runtime *runtime; 1609 struct snd_pcm_substream *s; 1610 wait_queue_t wait; 1611 int result = 0; 1612 int nonblock = 0; 1613 1614 card = substream->pcm->card; 1615 runtime = substream->runtime; 1616 1617 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 1618 return -EBADFD; 1619 1620 snd_power_lock(card); 1621 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1622 result = snd_power_wait(card, SNDRV_CTL_POWER_D0); 1623 if (result < 0) { 1624 snd_power_unlock(card); 1625 return result; 1626 } 1627 } 1628 1629 if (file) { 1630 if (file->f_flags & O_NONBLOCK) 1631 nonblock = 1; 1632 } else if (substream->f_flags & O_NONBLOCK) 1633 nonblock = 1; 1634 1635 down_read(&snd_pcm_link_rwsem); 1636 snd_pcm_stream_lock_irq(substream); 1637 /* resume pause */ 1638 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) 1639 snd_pcm_pause(substream, 0); 1640 1641 /* pre-start/stop - all running streams are changed to DRAINING state */ 1642 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0); 1643 if (result < 0) 1644 goto unlock; 1645 /* in non-blocking, we don't wait in ioctl but let caller poll */ 1646 if (nonblock) { 1647 result = -EAGAIN; 1648 goto unlock; 1649 } 1650 1651 for (;;) { 1652 long tout; 1653 struct snd_pcm_runtime *to_check; 1654 if (signal_pending(current)) { 1655 result = -ERESTARTSYS; 1656 break; 1657 } 1658 /* find a substream to drain */ 1659 to_check = NULL; 1660 snd_pcm_group_for_each_entry(s, substream) { 1661 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK) 1662 continue; 1663 runtime = s->runtime; 1664 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 1665 to_check = runtime; 1666 break; 1667 } 1668 } 1669 if (!to_check) 1670 break; /* all drained */ 1671 init_waitqueue_entry(&wait, current); 1672 add_wait_queue(&to_check->sleep, &wait); 1673 snd_pcm_stream_unlock_irq(substream); 1674 up_read(&snd_pcm_link_rwsem); 1675 snd_power_unlock(card); 1676 if (runtime->no_period_wakeup) 1677 tout = MAX_SCHEDULE_TIMEOUT; 1678 else { 1679 tout = 10; 1680 if (runtime->rate) { 1681 long t = runtime->period_size * 2 / runtime->rate; 1682 tout = max(t, tout); 1683 } 1684 tout = msecs_to_jiffies(tout * 1000); 1685 } 1686 tout = schedule_timeout_interruptible(tout); 1687 snd_power_lock(card); 1688 down_read(&snd_pcm_link_rwsem); 1689 snd_pcm_stream_lock_irq(substream); 1690 remove_wait_queue(&to_check->sleep, &wait); 1691 if (card->shutdown) { 1692 result = -ENODEV; 1693 break; 1694 } 1695 if (tout == 0) { 1696 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1697 result = -ESTRPIPE; 1698 else { 1699 dev_dbg(substream->pcm->card->dev, 1700 "playback drain error (DMA or IRQ trouble?)\n"); 1701 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1702 result = -EIO; 1703 } 1704 break; 1705 } 1706 } 1707 1708 unlock: 1709 snd_pcm_stream_unlock_irq(substream); 1710 up_read(&snd_pcm_link_rwsem); 1711 snd_power_unlock(card); 1712 1713 return result; 1714 } 1715 1716 /* 1717 * drop ioctl 1718 * 1719 * Immediately put all linked substreams into SETUP state. 1720 */ 1721 static int snd_pcm_drop(struct snd_pcm_substream *substream) 1722 { 1723 struct snd_pcm_runtime *runtime; 1724 int result = 0; 1725 1726 if (PCM_RUNTIME_CHECK(substream)) 1727 return -ENXIO; 1728 runtime = substream->runtime; 1729 1730 if (runtime->status->state == SNDRV_PCM_STATE_OPEN || 1731 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED || 1732 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1733 return -EBADFD; 1734 1735 snd_pcm_stream_lock_irq(substream); 1736 /* resume pause */ 1737 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) 1738 snd_pcm_pause(substream, 0); 1739 1740 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1741 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */ 1742 snd_pcm_stream_unlock_irq(substream); 1743 1744 return result; 1745 } 1746 1747 1748 static bool is_pcm_file(struct file *file) 1749 { 1750 struct inode *inode = file_inode(file); 1751 unsigned int minor; 1752 1753 if (!S_ISCHR(inode->i_mode) || imajor(inode) != snd_major) 1754 return false; 1755 minor = iminor(inode); 1756 return snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) || 1757 snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE); 1758 } 1759 1760 /* 1761 * PCM link handling 1762 */ 1763 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd) 1764 { 1765 int res = 0; 1766 struct snd_pcm_file *pcm_file; 1767 struct snd_pcm_substream *substream1; 1768 struct snd_pcm_group *group; 1769 struct fd f = fdget(fd); 1770 1771 if (!f.file) 1772 return -EBADFD; 1773 if (!is_pcm_file(f.file)) { 1774 res = -EBADFD; 1775 goto _badf; 1776 } 1777 pcm_file = f.file->private_data; 1778 substream1 = pcm_file->substream; 1779 group = kmalloc(sizeof(*group), GFP_KERNEL); 1780 if (!group) { 1781 res = -ENOMEM; 1782 goto _nolock; 1783 } 1784 down_write(&snd_pcm_link_rwsem); 1785 write_lock_irq(&snd_pcm_link_rwlock); 1786 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN || 1787 substream->runtime->status->state != substream1->runtime->status->state || 1788 substream->pcm->nonatomic != substream1->pcm->nonatomic) { 1789 res = -EBADFD; 1790 goto _end; 1791 } 1792 if (snd_pcm_stream_linked(substream1)) { 1793 res = -EALREADY; 1794 goto _end; 1795 } 1796 if (!snd_pcm_stream_linked(substream)) { 1797 substream->group = group; 1798 group = NULL; 1799 spin_lock_init(&substream->group->lock); 1800 mutex_init(&substream->group->mutex); 1801 INIT_LIST_HEAD(&substream->group->substreams); 1802 list_add_tail(&substream->link_list, &substream->group->substreams); 1803 substream->group->count = 1; 1804 } 1805 list_add_tail(&substream1->link_list, &substream->group->substreams); 1806 substream->group->count++; 1807 substream1->group = substream->group; 1808 _end: 1809 write_unlock_irq(&snd_pcm_link_rwlock); 1810 up_write(&snd_pcm_link_rwsem); 1811 _nolock: 1812 snd_card_unref(substream1->pcm->card); 1813 kfree(group); 1814 _badf: 1815 fdput(f); 1816 return res; 1817 } 1818 1819 static void relink_to_local(struct snd_pcm_substream *substream) 1820 { 1821 substream->group = &substream->self_group; 1822 INIT_LIST_HEAD(&substream->self_group.substreams); 1823 list_add_tail(&substream->link_list, &substream->self_group.substreams); 1824 } 1825 1826 static int snd_pcm_unlink(struct snd_pcm_substream *substream) 1827 { 1828 struct snd_pcm_substream *s; 1829 int res = 0; 1830 1831 down_write(&snd_pcm_link_rwsem); 1832 write_lock_irq(&snd_pcm_link_rwlock); 1833 if (!snd_pcm_stream_linked(substream)) { 1834 res = -EALREADY; 1835 goto _end; 1836 } 1837 list_del(&substream->link_list); 1838 substream->group->count--; 1839 if (substream->group->count == 1) { /* detach the last stream, too */ 1840 snd_pcm_group_for_each_entry(s, substream) { 1841 relink_to_local(s); 1842 break; 1843 } 1844 kfree(substream->group); 1845 } 1846 relink_to_local(substream); 1847 _end: 1848 write_unlock_irq(&snd_pcm_link_rwlock); 1849 up_write(&snd_pcm_link_rwsem); 1850 return res; 1851 } 1852 1853 /* 1854 * hw configurator 1855 */ 1856 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params, 1857 struct snd_pcm_hw_rule *rule) 1858 { 1859 struct snd_interval t; 1860 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]), 1861 hw_param_interval_c(params, rule->deps[1]), &t); 1862 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1863 } 1864 1865 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params, 1866 struct snd_pcm_hw_rule *rule) 1867 { 1868 struct snd_interval t; 1869 snd_interval_div(hw_param_interval_c(params, rule->deps[0]), 1870 hw_param_interval_c(params, rule->deps[1]), &t); 1871 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1872 } 1873 1874 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params, 1875 struct snd_pcm_hw_rule *rule) 1876 { 1877 struct snd_interval t; 1878 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]), 1879 hw_param_interval_c(params, rule->deps[1]), 1880 (unsigned long) rule->private, &t); 1881 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1882 } 1883 1884 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params, 1885 struct snd_pcm_hw_rule *rule) 1886 { 1887 struct snd_interval t; 1888 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]), 1889 (unsigned long) rule->private, 1890 hw_param_interval_c(params, rule->deps[1]), &t); 1891 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1892 } 1893 1894 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params, 1895 struct snd_pcm_hw_rule *rule) 1896 { 1897 unsigned int k; 1898 struct snd_interval *i = hw_param_interval(params, rule->deps[0]); 1899 struct snd_mask m; 1900 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 1901 snd_mask_any(&m); 1902 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { 1903 int bits; 1904 if (! snd_mask_test(mask, k)) 1905 continue; 1906 bits = snd_pcm_format_physical_width(k); 1907 if (bits <= 0) 1908 continue; /* ignore invalid formats */ 1909 if ((unsigned)bits < i->min || (unsigned)bits > i->max) 1910 snd_mask_reset(&m, k); 1911 } 1912 return snd_mask_refine(mask, &m); 1913 } 1914 1915 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params, 1916 struct snd_pcm_hw_rule *rule) 1917 { 1918 struct snd_interval t; 1919 unsigned int k; 1920 t.min = UINT_MAX; 1921 t.max = 0; 1922 t.openmin = 0; 1923 t.openmax = 0; 1924 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { 1925 int bits; 1926 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k)) 1927 continue; 1928 bits = snd_pcm_format_physical_width(k); 1929 if (bits <= 0) 1930 continue; /* ignore invalid formats */ 1931 if (t.min > (unsigned)bits) 1932 t.min = bits; 1933 if (t.max < (unsigned)bits) 1934 t.max = bits; 1935 } 1936 t.integer = 1; 1937 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1938 } 1939 1940 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12 1941 #error "Change this table" 1942 #endif 1943 1944 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100, 1945 48000, 64000, 88200, 96000, 176400, 192000 }; 1946 1947 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = { 1948 .count = ARRAY_SIZE(rates), 1949 .list = rates, 1950 }; 1951 1952 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params, 1953 struct snd_pcm_hw_rule *rule) 1954 { 1955 struct snd_pcm_hardware *hw = rule->private; 1956 return snd_interval_list(hw_param_interval(params, rule->var), 1957 snd_pcm_known_rates.count, 1958 snd_pcm_known_rates.list, hw->rates); 1959 } 1960 1961 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params, 1962 struct snd_pcm_hw_rule *rule) 1963 { 1964 struct snd_interval t; 1965 struct snd_pcm_substream *substream = rule->private; 1966 t.min = 0; 1967 t.max = substream->buffer_bytes_max; 1968 t.openmin = 0; 1969 t.openmax = 0; 1970 t.integer = 1; 1971 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1972 } 1973 1974 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream) 1975 { 1976 struct snd_pcm_runtime *runtime = substream->runtime; 1977 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; 1978 int k, err; 1979 1980 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { 1981 snd_mask_any(constrs_mask(constrs, k)); 1982 } 1983 1984 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { 1985 snd_interval_any(constrs_interval(constrs, k)); 1986 } 1987 1988 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS)); 1989 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)); 1990 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)); 1991 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)); 1992 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS)); 1993 1994 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, 1995 snd_pcm_hw_rule_format, NULL, 1996 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1997 if (err < 0) 1998 return err; 1999 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 2000 snd_pcm_hw_rule_sample_bits, NULL, 2001 SNDRV_PCM_HW_PARAM_FORMAT, 2002 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 2003 if (err < 0) 2004 return err; 2005 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 2006 snd_pcm_hw_rule_div, NULL, 2007 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); 2008 if (err < 0) 2009 return err; 2010 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 2011 snd_pcm_hw_rule_mul, NULL, 2012 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); 2013 if (err < 0) 2014 return err; 2015 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 2016 snd_pcm_hw_rule_mulkdiv, (void*) 8, 2017 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 2018 if (err < 0) 2019 return err; 2020 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 2021 snd_pcm_hw_rule_mulkdiv, (void*) 8, 2022 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1); 2023 if (err < 0) 2024 return err; 2025 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 2026 snd_pcm_hw_rule_div, NULL, 2027 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 2028 if (err < 0) 2029 return err; 2030 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 2031 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 2032 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1); 2033 if (err < 0) 2034 return err; 2035 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 2036 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 2037 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1); 2038 if (err < 0) 2039 return err; 2040 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, 2041 snd_pcm_hw_rule_div, NULL, 2042 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 2043 if (err < 0) 2044 return err; 2045 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 2046 snd_pcm_hw_rule_div, NULL, 2047 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); 2048 if (err < 0) 2049 return err; 2050 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 2051 snd_pcm_hw_rule_mulkdiv, (void*) 8, 2052 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 2053 if (err < 0) 2054 return err; 2055 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 2056 snd_pcm_hw_rule_muldivk, (void*) 1000000, 2057 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); 2058 if (err < 0) 2059 return err; 2060 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 2061 snd_pcm_hw_rule_mul, NULL, 2062 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); 2063 if (err < 0) 2064 return err; 2065 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 2066 snd_pcm_hw_rule_mulkdiv, (void*) 8, 2067 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 2068 if (err < 0) 2069 return err; 2070 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 2071 snd_pcm_hw_rule_muldivk, (void*) 1000000, 2072 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); 2073 if (err < 0) 2074 return err; 2075 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 2076 snd_pcm_hw_rule_muldivk, (void*) 8, 2077 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 2078 if (err < 0) 2079 return err; 2080 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 2081 snd_pcm_hw_rule_muldivk, (void*) 8, 2082 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 2083 if (err < 0) 2084 return err; 2085 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 2086 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 2087 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); 2088 if (err < 0) 2089 return err; 2090 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME, 2091 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 2092 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); 2093 if (err < 0) 2094 return err; 2095 return 0; 2096 } 2097 2098 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream) 2099 { 2100 struct snd_pcm_runtime *runtime = substream->runtime; 2101 struct snd_pcm_hardware *hw = &runtime->hw; 2102 int err; 2103 unsigned int mask = 0; 2104 2105 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) 2106 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED; 2107 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) 2108 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED; 2109 if (hw_support_mmap(substream)) { 2110 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) 2111 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; 2112 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) 2113 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED; 2114 if (hw->info & SNDRV_PCM_INFO_COMPLEX) 2115 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX; 2116 } 2117 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask); 2118 if (err < 0) 2119 return err; 2120 2121 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats); 2122 if (err < 0) 2123 return err; 2124 2125 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD); 2126 if (err < 0) 2127 return err; 2128 2129 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, 2130 hw->channels_min, hw->channels_max); 2131 if (err < 0) 2132 return err; 2133 2134 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE, 2135 hw->rate_min, hw->rate_max); 2136 if (err < 0) 2137 return err; 2138 2139 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 2140 hw->period_bytes_min, hw->period_bytes_max); 2141 if (err < 0) 2142 return err; 2143 2144 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS, 2145 hw->periods_min, hw->periods_max); 2146 if (err < 0) 2147 return err; 2148 2149 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 2150 hw->period_bytes_min, hw->buffer_bytes_max); 2151 if (err < 0) 2152 return err; 2153 2154 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 2155 snd_pcm_hw_rule_buffer_bytes_max, substream, 2156 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1); 2157 if (err < 0) 2158 return err; 2159 2160 /* FIXME: remove */ 2161 if (runtime->dma_bytes) { 2162 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes); 2163 if (err < 0) 2164 return err; 2165 } 2166 2167 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) { 2168 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 2169 snd_pcm_hw_rule_rate, hw, 2170 SNDRV_PCM_HW_PARAM_RATE, -1); 2171 if (err < 0) 2172 return err; 2173 } 2174 2175 /* FIXME: this belong to lowlevel */ 2176 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE); 2177 2178 return 0; 2179 } 2180 2181 static void pcm_release_private(struct snd_pcm_substream *substream) 2182 { 2183 snd_pcm_unlink(substream); 2184 } 2185 2186 void snd_pcm_release_substream(struct snd_pcm_substream *substream) 2187 { 2188 substream->ref_count--; 2189 if (substream->ref_count > 0) 2190 return; 2191 2192 snd_pcm_drop(substream); 2193 if (substream->hw_opened) { 2194 if (substream->ops->hw_free != NULL) 2195 substream->ops->hw_free(substream); 2196 substream->ops->close(substream); 2197 substream->hw_opened = 0; 2198 } 2199 if (pm_qos_request_active(&substream->latency_pm_qos_req)) 2200 pm_qos_remove_request(&substream->latency_pm_qos_req); 2201 if (substream->pcm_release) { 2202 substream->pcm_release(substream); 2203 substream->pcm_release = NULL; 2204 } 2205 snd_pcm_detach_substream(substream); 2206 } 2207 2208 EXPORT_SYMBOL(snd_pcm_release_substream); 2209 2210 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, 2211 struct file *file, 2212 struct snd_pcm_substream **rsubstream) 2213 { 2214 struct snd_pcm_substream *substream; 2215 int err; 2216 2217 err = snd_pcm_attach_substream(pcm, stream, file, &substream); 2218 if (err < 0) 2219 return err; 2220 if (substream->ref_count > 1) { 2221 *rsubstream = substream; 2222 return 0; 2223 } 2224 2225 err = snd_pcm_hw_constraints_init(substream); 2226 if (err < 0) { 2227 pcm_dbg(pcm, "snd_pcm_hw_constraints_init failed\n"); 2228 goto error; 2229 } 2230 2231 if ((err = substream->ops->open(substream)) < 0) 2232 goto error; 2233 2234 substream->hw_opened = 1; 2235 2236 err = snd_pcm_hw_constraints_complete(substream); 2237 if (err < 0) { 2238 pcm_dbg(pcm, "snd_pcm_hw_constraints_complete failed\n"); 2239 goto error; 2240 } 2241 2242 *rsubstream = substream; 2243 return 0; 2244 2245 error: 2246 snd_pcm_release_substream(substream); 2247 return err; 2248 } 2249 2250 EXPORT_SYMBOL(snd_pcm_open_substream); 2251 2252 static int snd_pcm_open_file(struct file *file, 2253 struct snd_pcm *pcm, 2254 int stream) 2255 { 2256 struct snd_pcm_file *pcm_file; 2257 struct snd_pcm_substream *substream; 2258 int err; 2259 2260 err = snd_pcm_open_substream(pcm, stream, file, &substream); 2261 if (err < 0) 2262 return err; 2263 2264 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL); 2265 if (pcm_file == NULL) { 2266 snd_pcm_release_substream(substream); 2267 return -ENOMEM; 2268 } 2269 pcm_file->substream = substream; 2270 if (substream->ref_count == 1) { 2271 substream->file = pcm_file; 2272 substream->pcm_release = pcm_release_private; 2273 } 2274 file->private_data = pcm_file; 2275 2276 return 0; 2277 } 2278 2279 static int snd_pcm_playback_open(struct inode *inode, struct file *file) 2280 { 2281 struct snd_pcm *pcm; 2282 int err = nonseekable_open(inode, file); 2283 if (err < 0) 2284 return err; 2285 pcm = snd_lookup_minor_data(iminor(inode), 2286 SNDRV_DEVICE_TYPE_PCM_PLAYBACK); 2287 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK); 2288 if (pcm) 2289 snd_card_unref(pcm->card); 2290 return err; 2291 } 2292 2293 static int snd_pcm_capture_open(struct inode *inode, struct file *file) 2294 { 2295 struct snd_pcm *pcm; 2296 int err = nonseekable_open(inode, file); 2297 if (err < 0) 2298 return err; 2299 pcm = snd_lookup_minor_data(iminor(inode), 2300 SNDRV_DEVICE_TYPE_PCM_CAPTURE); 2301 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE); 2302 if (pcm) 2303 snd_card_unref(pcm->card); 2304 return err; 2305 } 2306 2307 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream) 2308 { 2309 int err; 2310 wait_queue_t wait; 2311 2312 if (pcm == NULL) { 2313 err = -ENODEV; 2314 goto __error1; 2315 } 2316 err = snd_card_file_add(pcm->card, file); 2317 if (err < 0) 2318 goto __error1; 2319 if (!try_module_get(pcm->card->module)) { 2320 err = -EFAULT; 2321 goto __error2; 2322 } 2323 init_waitqueue_entry(&wait, current); 2324 add_wait_queue(&pcm->open_wait, &wait); 2325 mutex_lock(&pcm->open_mutex); 2326 while (1) { 2327 err = snd_pcm_open_file(file, pcm, stream); 2328 if (err >= 0) 2329 break; 2330 if (err == -EAGAIN) { 2331 if (file->f_flags & O_NONBLOCK) { 2332 err = -EBUSY; 2333 break; 2334 } 2335 } else 2336 break; 2337 set_current_state(TASK_INTERRUPTIBLE); 2338 mutex_unlock(&pcm->open_mutex); 2339 schedule(); 2340 mutex_lock(&pcm->open_mutex); 2341 if (pcm->card->shutdown) { 2342 err = -ENODEV; 2343 break; 2344 } 2345 if (signal_pending(current)) { 2346 err = -ERESTARTSYS; 2347 break; 2348 } 2349 } 2350 remove_wait_queue(&pcm->open_wait, &wait); 2351 mutex_unlock(&pcm->open_mutex); 2352 if (err < 0) 2353 goto __error; 2354 return err; 2355 2356 __error: 2357 module_put(pcm->card->module); 2358 __error2: 2359 snd_card_file_remove(pcm->card, file); 2360 __error1: 2361 return err; 2362 } 2363 2364 static int snd_pcm_release(struct inode *inode, struct file *file) 2365 { 2366 struct snd_pcm *pcm; 2367 struct snd_pcm_substream *substream; 2368 struct snd_pcm_file *pcm_file; 2369 2370 pcm_file = file->private_data; 2371 substream = pcm_file->substream; 2372 if (snd_BUG_ON(!substream)) 2373 return -ENXIO; 2374 pcm = substream->pcm; 2375 mutex_lock(&pcm->open_mutex); 2376 snd_pcm_release_substream(substream); 2377 kfree(pcm_file); 2378 mutex_unlock(&pcm->open_mutex); 2379 wake_up(&pcm->open_wait); 2380 module_put(pcm->card->module); 2381 snd_card_file_remove(pcm->card, file); 2382 return 0; 2383 } 2384 2385 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream, 2386 snd_pcm_uframes_t frames) 2387 { 2388 struct snd_pcm_runtime *runtime = substream->runtime; 2389 snd_pcm_sframes_t appl_ptr; 2390 snd_pcm_sframes_t ret; 2391 snd_pcm_sframes_t hw_avail; 2392 2393 if (frames == 0) 2394 return 0; 2395 2396 snd_pcm_stream_lock_irq(substream); 2397 switch (runtime->status->state) { 2398 case SNDRV_PCM_STATE_PREPARED: 2399 break; 2400 case SNDRV_PCM_STATE_DRAINING: 2401 case SNDRV_PCM_STATE_RUNNING: 2402 if (snd_pcm_update_hw_ptr(substream) >= 0) 2403 break; 2404 /* Fall through */ 2405 case SNDRV_PCM_STATE_XRUN: 2406 ret = -EPIPE; 2407 goto __end; 2408 case SNDRV_PCM_STATE_SUSPENDED: 2409 ret = -ESTRPIPE; 2410 goto __end; 2411 default: 2412 ret = -EBADFD; 2413 goto __end; 2414 } 2415 2416 hw_avail = snd_pcm_playback_hw_avail(runtime); 2417 if (hw_avail <= 0) { 2418 ret = 0; 2419 goto __end; 2420 } 2421 if (frames > (snd_pcm_uframes_t)hw_avail) 2422 frames = hw_avail; 2423 appl_ptr = runtime->control->appl_ptr - frames; 2424 if (appl_ptr < 0) 2425 appl_ptr += runtime->boundary; 2426 runtime->control->appl_ptr = appl_ptr; 2427 ret = frames; 2428 __end: 2429 snd_pcm_stream_unlock_irq(substream); 2430 return ret; 2431 } 2432 2433 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream, 2434 snd_pcm_uframes_t frames) 2435 { 2436 struct snd_pcm_runtime *runtime = substream->runtime; 2437 snd_pcm_sframes_t appl_ptr; 2438 snd_pcm_sframes_t ret; 2439 snd_pcm_sframes_t hw_avail; 2440 2441 if (frames == 0) 2442 return 0; 2443 2444 snd_pcm_stream_lock_irq(substream); 2445 switch (runtime->status->state) { 2446 case SNDRV_PCM_STATE_PREPARED: 2447 case SNDRV_PCM_STATE_DRAINING: 2448 break; 2449 case SNDRV_PCM_STATE_RUNNING: 2450 if (snd_pcm_update_hw_ptr(substream) >= 0) 2451 break; 2452 /* Fall through */ 2453 case SNDRV_PCM_STATE_XRUN: 2454 ret = -EPIPE; 2455 goto __end; 2456 case SNDRV_PCM_STATE_SUSPENDED: 2457 ret = -ESTRPIPE; 2458 goto __end; 2459 default: 2460 ret = -EBADFD; 2461 goto __end; 2462 } 2463 2464 hw_avail = snd_pcm_capture_hw_avail(runtime); 2465 if (hw_avail <= 0) { 2466 ret = 0; 2467 goto __end; 2468 } 2469 if (frames > (snd_pcm_uframes_t)hw_avail) 2470 frames = hw_avail; 2471 appl_ptr = runtime->control->appl_ptr - frames; 2472 if (appl_ptr < 0) 2473 appl_ptr += runtime->boundary; 2474 runtime->control->appl_ptr = appl_ptr; 2475 ret = frames; 2476 __end: 2477 snd_pcm_stream_unlock_irq(substream); 2478 return ret; 2479 } 2480 2481 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream, 2482 snd_pcm_uframes_t frames) 2483 { 2484 struct snd_pcm_runtime *runtime = substream->runtime; 2485 snd_pcm_sframes_t appl_ptr; 2486 snd_pcm_sframes_t ret; 2487 snd_pcm_sframes_t avail; 2488 2489 if (frames == 0) 2490 return 0; 2491 2492 snd_pcm_stream_lock_irq(substream); 2493 switch (runtime->status->state) { 2494 case SNDRV_PCM_STATE_PREPARED: 2495 case SNDRV_PCM_STATE_PAUSED: 2496 break; 2497 case SNDRV_PCM_STATE_DRAINING: 2498 case SNDRV_PCM_STATE_RUNNING: 2499 if (snd_pcm_update_hw_ptr(substream) >= 0) 2500 break; 2501 /* Fall through */ 2502 case SNDRV_PCM_STATE_XRUN: 2503 ret = -EPIPE; 2504 goto __end; 2505 case SNDRV_PCM_STATE_SUSPENDED: 2506 ret = -ESTRPIPE; 2507 goto __end; 2508 default: 2509 ret = -EBADFD; 2510 goto __end; 2511 } 2512 2513 avail = snd_pcm_playback_avail(runtime); 2514 if (avail <= 0) { 2515 ret = 0; 2516 goto __end; 2517 } 2518 if (frames > (snd_pcm_uframes_t)avail) 2519 frames = avail; 2520 appl_ptr = runtime->control->appl_ptr + frames; 2521 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) 2522 appl_ptr -= runtime->boundary; 2523 runtime->control->appl_ptr = appl_ptr; 2524 ret = frames; 2525 __end: 2526 snd_pcm_stream_unlock_irq(substream); 2527 return ret; 2528 } 2529 2530 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream, 2531 snd_pcm_uframes_t frames) 2532 { 2533 struct snd_pcm_runtime *runtime = substream->runtime; 2534 snd_pcm_sframes_t appl_ptr; 2535 snd_pcm_sframes_t ret; 2536 snd_pcm_sframes_t avail; 2537 2538 if (frames == 0) 2539 return 0; 2540 2541 snd_pcm_stream_lock_irq(substream); 2542 switch (runtime->status->state) { 2543 case SNDRV_PCM_STATE_PREPARED: 2544 case SNDRV_PCM_STATE_DRAINING: 2545 case SNDRV_PCM_STATE_PAUSED: 2546 break; 2547 case SNDRV_PCM_STATE_RUNNING: 2548 if (snd_pcm_update_hw_ptr(substream) >= 0) 2549 break; 2550 /* Fall through */ 2551 case SNDRV_PCM_STATE_XRUN: 2552 ret = -EPIPE; 2553 goto __end; 2554 case SNDRV_PCM_STATE_SUSPENDED: 2555 ret = -ESTRPIPE; 2556 goto __end; 2557 default: 2558 ret = -EBADFD; 2559 goto __end; 2560 } 2561 2562 avail = snd_pcm_capture_avail(runtime); 2563 if (avail <= 0) { 2564 ret = 0; 2565 goto __end; 2566 } 2567 if (frames > (snd_pcm_uframes_t)avail) 2568 frames = avail; 2569 appl_ptr = runtime->control->appl_ptr + frames; 2570 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) 2571 appl_ptr -= runtime->boundary; 2572 runtime->control->appl_ptr = appl_ptr; 2573 ret = frames; 2574 __end: 2575 snd_pcm_stream_unlock_irq(substream); 2576 return ret; 2577 } 2578 2579 static int snd_pcm_hwsync(struct snd_pcm_substream *substream) 2580 { 2581 struct snd_pcm_runtime *runtime = substream->runtime; 2582 int err; 2583 2584 snd_pcm_stream_lock_irq(substream); 2585 switch (runtime->status->state) { 2586 case SNDRV_PCM_STATE_DRAINING: 2587 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 2588 goto __badfd; 2589 /* Fall through */ 2590 case SNDRV_PCM_STATE_RUNNING: 2591 if ((err = snd_pcm_update_hw_ptr(substream)) < 0) 2592 break; 2593 /* Fall through */ 2594 case SNDRV_PCM_STATE_PREPARED: 2595 case SNDRV_PCM_STATE_SUSPENDED: 2596 err = 0; 2597 break; 2598 case SNDRV_PCM_STATE_XRUN: 2599 err = -EPIPE; 2600 break; 2601 default: 2602 __badfd: 2603 err = -EBADFD; 2604 break; 2605 } 2606 snd_pcm_stream_unlock_irq(substream); 2607 return err; 2608 } 2609 2610 static int snd_pcm_delay(struct snd_pcm_substream *substream, 2611 snd_pcm_sframes_t __user *res) 2612 { 2613 struct snd_pcm_runtime *runtime = substream->runtime; 2614 int err; 2615 snd_pcm_sframes_t n = 0; 2616 2617 snd_pcm_stream_lock_irq(substream); 2618 switch (runtime->status->state) { 2619 case SNDRV_PCM_STATE_DRAINING: 2620 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 2621 goto __badfd; 2622 /* Fall through */ 2623 case SNDRV_PCM_STATE_RUNNING: 2624 if ((err = snd_pcm_update_hw_ptr(substream)) < 0) 2625 break; 2626 /* Fall through */ 2627 case SNDRV_PCM_STATE_PREPARED: 2628 case SNDRV_PCM_STATE_SUSPENDED: 2629 err = 0; 2630 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2631 n = snd_pcm_playback_hw_avail(runtime); 2632 else 2633 n = snd_pcm_capture_avail(runtime); 2634 n += runtime->delay; 2635 break; 2636 case SNDRV_PCM_STATE_XRUN: 2637 err = -EPIPE; 2638 break; 2639 default: 2640 __badfd: 2641 err = -EBADFD; 2642 break; 2643 } 2644 snd_pcm_stream_unlock_irq(substream); 2645 if (!err) 2646 if (put_user(n, res)) 2647 err = -EFAULT; 2648 return err; 2649 } 2650 2651 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream, 2652 struct snd_pcm_sync_ptr __user *_sync_ptr) 2653 { 2654 struct snd_pcm_runtime *runtime = substream->runtime; 2655 struct snd_pcm_sync_ptr sync_ptr; 2656 volatile struct snd_pcm_mmap_status *status; 2657 volatile struct snd_pcm_mmap_control *control; 2658 int err; 2659 2660 memset(&sync_ptr, 0, sizeof(sync_ptr)); 2661 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags))) 2662 return -EFAULT; 2663 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control))) 2664 return -EFAULT; 2665 status = runtime->status; 2666 control = runtime->control; 2667 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) { 2668 err = snd_pcm_hwsync(substream); 2669 if (err < 0) 2670 return err; 2671 } 2672 snd_pcm_stream_lock_irq(substream); 2673 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) 2674 control->appl_ptr = sync_ptr.c.control.appl_ptr; 2675 else 2676 sync_ptr.c.control.appl_ptr = control->appl_ptr; 2677 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) 2678 control->avail_min = sync_ptr.c.control.avail_min; 2679 else 2680 sync_ptr.c.control.avail_min = control->avail_min; 2681 sync_ptr.s.status.state = status->state; 2682 sync_ptr.s.status.hw_ptr = status->hw_ptr; 2683 sync_ptr.s.status.tstamp = status->tstamp; 2684 sync_ptr.s.status.suspended_state = status->suspended_state; 2685 snd_pcm_stream_unlock_irq(substream); 2686 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr))) 2687 return -EFAULT; 2688 return 0; 2689 } 2690 2691 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg) 2692 { 2693 struct snd_pcm_runtime *runtime = substream->runtime; 2694 int arg; 2695 2696 if (get_user(arg, _arg)) 2697 return -EFAULT; 2698 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST) 2699 return -EINVAL; 2700 runtime->tstamp_type = arg; 2701 return 0; 2702 } 2703 2704 static int snd_pcm_common_ioctl1(struct file *file, 2705 struct snd_pcm_substream *substream, 2706 unsigned int cmd, void __user *arg) 2707 { 2708 switch (cmd) { 2709 case SNDRV_PCM_IOCTL_PVERSION: 2710 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0; 2711 case SNDRV_PCM_IOCTL_INFO: 2712 return snd_pcm_info_user(substream, arg); 2713 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */ 2714 return 0; 2715 case SNDRV_PCM_IOCTL_TTSTAMP: 2716 return snd_pcm_tstamp(substream, arg); 2717 case SNDRV_PCM_IOCTL_HW_REFINE: 2718 return snd_pcm_hw_refine_user(substream, arg); 2719 case SNDRV_PCM_IOCTL_HW_PARAMS: 2720 return snd_pcm_hw_params_user(substream, arg); 2721 case SNDRV_PCM_IOCTL_HW_FREE: 2722 return snd_pcm_hw_free(substream); 2723 case SNDRV_PCM_IOCTL_SW_PARAMS: 2724 return snd_pcm_sw_params_user(substream, arg); 2725 case SNDRV_PCM_IOCTL_STATUS: 2726 return snd_pcm_status_user(substream, arg); 2727 case SNDRV_PCM_IOCTL_CHANNEL_INFO: 2728 return snd_pcm_channel_info_user(substream, arg); 2729 case SNDRV_PCM_IOCTL_PREPARE: 2730 return snd_pcm_prepare(substream, file); 2731 case SNDRV_PCM_IOCTL_RESET: 2732 return snd_pcm_reset(substream); 2733 case SNDRV_PCM_IOCTL_START: 2734 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING); 2735 case SNDRV_PCM_IOCTL_LINK: 2736 return snd_pcm_link(substream, (int)(unsigned long) arg); 2737 case SNDRV_PCM_IOCTL_UNLINK: 2738 return snd_pcm_unlink(substream); 2739 case SNDRV_PCM_IOCTL_RESUME: 2740 return snd_pcm_resume(substream); 2741 case SNDRV_PCM_IOCTL_XRUN: 2742 return snd_pcm_xrun(substream); 2743 case SNDRV_PCM_IOCTL_HWSYNC: 2744 return snd_pcm_hwsync(substream); 2745 case SNDRV_PCM_IOCTL_DELAY: 2746 return snd_pcm_delay(substream, arg); 2747 case SNDRV_PCM_IOCTL_SYNC_PTR: 2748 return snd_pcm_sync_ptr(substream, arg); 2749 #ifdef CONFIG_SND_SUPPORT_OLD_API 2750 case SNDRV_PCM_IOCTL_HW_REFINE_OLD: 2751 return snd_pcm_hw_refine_old_user(substream, arg); 2752 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD: 2753 return snd_pcm_hw_params_old_user(substream, arg); 2754 #endif 2755 case SNDRV_PCM_IOCTL_DRAIN: 2756 return snd_pcm_drain(substream, file); 2757 case SNDRV_PCM_IOCTL_DROP: 2758 return snd_pcm_drop(substream); 2759 case SNDRV_PCM_IOCTL_PAUSE: 2760 { 2761 int res; 2762 snd_pcm_stream_lock_irq(substream); 2763 res = snd_pcm_pause(substream, (int)(unsigned long)arg); 2764 snd_pcm_stream_unlock_irq(substream); 2765 return res; 2766 } 2767 } 2768 pcm_dbg(substream->pcm, "unknown ioctl = 0x%x\n", cmd); 2769 return -ENOTTY; 2770 } 2771 2772 static int snd_pcm_playback_ioctl1(struct file *file, 2773 struct snd_pcm_substream *substream, 2774 unsigned int cmd, void __user *arg) 2775 { 2776 if (snd_BUG_ON(!substream)) 2777 return -ENXIO; 2778 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) 2779 return -EINVAL; 2780 switch (cmd) { 2781 case SNDRV_PCM_IOCTL_WRITEI_FRAMES: 2782 { 2783 struct snd_xferi xferi; 2784 struct snd_xferi __user *_xferi = arg; 2785 struct snd_pcm_runtime *runtime = substream->runtime; 2786 snd_pcm_sframes_t result; 2787 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2788 return -EBADFD; 2789 if (put_user(0, &_xferi->result)) 2790 return -EFAULT; 2791 if (copy_from_user(&xferi, _xferi, sizeof(xferi))) 2792 return -EFAULT; 2793 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames); 2794 __put_user(result, &_xferi->result); 2795 return result < 0 ? result : 0; 2796 } 2797 case SNDRV_PCM_IOCTL_WRITEN_FRAMES: 2798 { 2799 struct snd_xfern xfern; 2800 struct snd_xfern __user *_xfern = arg; 2801 struct snd_pcm_runtime *runtime = substream->runtime; 2802 void __user **bufs; 2803 snd_pcm_sframes_t result; 2804 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2805 return -EBADFD; 2806 if (runtime->channels > 128) 2807 return -EINVAL; 2808 if (put_user(0, &_xfern->result)) 2809 return -EFAULT; 2810 if (copy_from_user(&xfern, _xfern, sizeof(xfern))) 2811 return -EFAULT; 2812 2813 bufs = memdup_user(xfern.bufs, 2814 sizeof(void *) * runtime->channels); 2815 if (IS_ERR(bufs)) 2816 return PTR_ERR(bufs); 2817 result = snd_pcm_lib_writev(substream, bufs, xfern.frames); 2818 kfree(bufs); 2819 __put_user(result, &_xfern->result); 2820 return result < 0 ? result : 0; 2821 } 2822 case SNDRV_PCM_IOCTL_REWIND: 2823 { 2824 snd_pcm_uframes_t frames; 2825 snd_pcm_uframes_t __user *_frames = arg; 2826 snd_pcm_sframes_t result; 2827 if (get_user(frames, _frames)) 2828 return -EFAULT; 2829 if (put_user(0, _frames)) 2830 return -EFAULT; 2831 result = snd_pcm_playback_rewind(substream, frames); 2832 __put_user(result, _frames); 2833 return result < 0 ? result : 0; 2834 } 2835 case SNDRV_PCM_IOCTL_FORWARD: 2836 { 2837 snd_pcm_uframes_t frames; 2838 snd_pcm_uframes_t __user *_frames = arg; 2839 snd_pcm_sframes_t result; 2840 if (get_user(frames, _frames)) 2841 return -EFAULT; 2842 if (put_user(0, _frames)) 2843 return -EFAULT; 2844 result = snd_pcm_playback_forward(substream, frames); 2845 __put_user(result, _frames); 2846 return result < 0 ? result : 0; 2847 } 2848 } 2849 return snd_pcm_common_ioctl1(file, substream, cmd, arg); 2850 } 2851 2852 static int snd_pcm_capture_ioctl1(struct file *file, 2853 struct snd_pcm_substream *substream, 2854 unsigned int cmd, void __user *arg) 2855 { 2856 if (snd_BUG_ON(!substream)) 2857 return -ENXIO; 2858 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE)) 2859 return -EINVAL; 2860 switch (cmd) { 2861 case SNDRV_PCM_IOCTL_READI_FRAMES: 2862 { 2863 struct snd_xferi xferi; 2864 struct snd_xferi __user *_xferi = arg; 2865 struct snd_pcm_runtime *runtime = substream->runtime; 2866 snd_pcm_sframes_t result; 2867 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2868 return -EBADFD; 2869 if (put_user(0, &_xferi->result)) 2870 return -EFAULT; 2871 if (copy_from_user(&xferi, _xferi, sizeof(xferi))) 2872 return -EFAULT; 2873 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames); 2874 __put_user(result, &_xferi->result); 2875 return result < 0 ? result : 0; 2876 } 2877 case SNDRV_PCM_IOCTL_READN_FRAMES: 2878 { 2879 struct snd_xfern xfern; 2880 struct snd_xfern __user *_xfern = arg; 2881 struct snd_pcm_runtime *runtime = substream->runtime; 2882 void *bufs; 2883 snd_pcm_sframes_t result; 2884 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2885 return -EBADFD; 2886 if (runtime->channels > 128) 2887 return -EINVAL; 2888 if (put_user(0, &_xfern->result)) 2889 return -EFAULT; 2890 if (copy_from_user(&xfern, _xfern, sizeof(xfern))) 2891 return -EFAULT; 2892 2893 bufs = memdup_user(xfern.bufs, 2894 sizeof(void *) * runtime->channels); 2895 if (IS_ERR(bufs)) 2896 return PTR_ERR(bufs); 2897 result = snd_pcm_lib_readv(substream, bufs, xfern.frames); 2898 kfree(bufs); 2899 __put_user(result, &_xfern->result); 2900 return result < 0 ? result : 0; 2901 } 2902 case SNDRV_PCM_IOCTL_REWIND: 2903 { 2904 snd_pcm_uframes_t frames; 2905 snd_pcm_uframes_t __user *_frames = arg; 2906 snd_pcm_sframes_t result; 2907 if (get_user(frames, _frames)) 2908 return -EFAULT; 2909 if (put_user(0, _frames)) 2910 return -EFAULT; 2911 result = snd_pcm_capture_rewind(substream, frames); 2912 __put_user(result, _frames); 2913 return result < 0 ? result : 0; 2914 } 2915 case SNDRV_PCM_IOCTL_FORWARD: 2916 { 2917 snd_pcm_uframes_t frames; 2918 snd_pcm_uframes_t __user *_frames = arg; 2919 snd_pcm_sframes_t result; 2920 if (get_user(frames, _frames)) 2921 return -EFAULT; 2922 if (put_user(0, _frames)) 2923 return -EFAULT; 2924 result = snd_pcm_capture_forward(substream, frames); 2925 __put_user(result, _frames); 2926 return result < 0 ? result : 0; 2927 } 2928 } 2929 return snd_pcm_common_ioctl1(file, substream, cmd, arg); 2930 } 2931 2932 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd, 2933 unsigned long arg) 2934 { 2935 struct snd_pcm_file *pcm_file; 2936 2937 pcm_file = file->private_data; 2938 2939 if (((cmd >> 8) & 0xff) != 'A') 2940 return -ENOTTY; 2941 2942 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd, 2943 (void __user *)arg); 2944 } 2945 2946 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd, 2947 unsigned long arg) 2948 { 2949 struct snd_pcm_file *pcm_file; 2950 2951 pcm_file = file->private_data; 2952 2953 if (((cmd >> 8) & 0xff) != 'A') 2954 return -ENOTTY; 2955 2956 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd, 2957 (void __user *)arg); 2958 } 2959 2960 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, 2961 unsigned int cmd, void *arg) 2962 { 2963 mm_segment_t fs; 2964 int result; 2965 2966 fs = snd_enter_user(); 2967 switch (substream->stream) { 2968 case SNDRV_PCM_STREAM_PLAYBACK: 2969 result = snd_pcm_playback_ioctl1(NULL, substream, cmd, 2970 (void __user *)arg); 2971 break; 2972 case SNDRV_PCM_STREAM_CAPTURE: 2973 result = snd_pcm_capture_ioctl1(NULL, substream, cmd, 2974 (void __user *)arg); 2975 break; 2976 default: 2977 result = -EINVAL; 2978 break; 2979 } 2980 snd_leave_user(fs); 2981 return result; 2982 } 2983 2984 EXPORT_SYMBOL(snd_pcm_kernel_ioctl); 2985 2986 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count, 2987 loff_t * offset) 2988 { 2989 struct snd_pcm_file *pcm_file; 2990 struct snd_pcm_substream *substream; 2991 struct snd_pcm_runtime *runtime; 2992 snd_pcm_sframes_t result; 2993 2994 pcm_file = file->private_data; 2995 substream = pcm_file->substream; 2996 if (PCM_RUNTIME_CHECK(substream)) 2997 return -ENXIO; 2998 runtime = substream->runtime; 2999 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 3000 return -EBADFD; 3001 if (!frame_aligned(runtime, count)) 3002 return -EINVAL; 3003 count = bytes_to_frames(runtime, count); 3004 result = snd_pcm_lib_read(substream, buf, count); 3005 if (result > 0) 3006 result = frames_to_bytes(runtime, result); 3007 return result; 3008 } 3009 3010 static ssize_t snd_pcm_write(struct file *file, const char __user *buf, 3011 size_t count, loff_t * offset) 3012 { 3013 struct snd_pcm_file *pcm_file; 3014 struct snd_pcm_substream *substream; 3015 struct snd_pcm_runtime *runtime; 3016 snd_pcm_sframes_t result; 3017 3018 pcm_file = file->private_data; 3019 substream = pcm_file->substream; 3020 if (PCM_RUNTIME_CHECK(substream)) 3021 return -ENXIO; 3022 runtime = substream->runtime; 3023 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 3024 return -EBADFD; 3025 if (!frame_aligned(runtime, count)) 3026 return -EINVAL; 3027 count = bytes_to_frames(runtime, count); 3028 result = snd_pcm_lib_write(substream, buf, count); 3029 if (result > 0) 3030 result = frames_to_bytes(runtime, result); 3031 return result; 3032 } 3033 3034 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov, 3035 unsigned long nr_segs, loff_t pos) 3036 3037 { 3038 struct snd_pcm_file *pcm_file; 3039 struct snd_pcm_substream *substream; 3040 struct snd_pcm_runtime *runtime; 3041 snd_pcm_sframes_t result; 3042 unsigned long i; 3043 void __user **bufs; 3044 snd_pcm_uframes_t frames; 3045 3046 pcm_file = iocb->ki_filp->private_data; 3047 substream = pcm_file->substream; 3048 if (PCM_RUNTIME_CHECK(substream)) 3049 return -ENXIO; 3050 runtime = substream->runtime; 3051 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 3052 return -EBADFD; 3053 if (nr_segs > 1024 || nr_segs != runtime->channels) 3054 return -EINVAL; 3055 if (!frame_aligned(runtime, iov->iov_len)) 3056 return -EINVAL; 3057 frames = bytes_to_samples(runtime, iov->iov_len); 3058 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL); 3059 if (bufs == NULL) 3060 return -ENOMEM; 3061 for (i = 0; i < nr_segs; ++i) 3062 bufs[i] = iov[i].iov_base; 3063 result = snd_pcm_lib_readv(substream, bufs, frames); 3064 if (result > 0) 3065 result = frames_to_bytes(runtime, result); 3066 kfree(bufs); 3067 return result; 3068 } 3069 3070 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov, 3071 unsigned long nr_segs, loff_t pos) 3072 { 3073 struct snd_pcm_file *pcm_file; 3074 struct snd_pcm_substream *substream; 3075 struct snd_pcm_runtime *runtime; 3076 snd_pcm_sframes_t result; 3077 unsigned long i; 3078 void __user **bufs; 3079 snd_pcm_uframes_t frames; 3080 3081 pcm_file = iocb->ki_filp->private_data; 3082 substream = pcm_file->substream; 3083 if (PCM_RUNTIME_CHECK(substream)) 3084 return -ENXIO; 3085 runtime = substream->runtime; 3086 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 3087 return -EBADFD; 3088 if (nr_segs > 128 || nr_segs != runtime->channels || 3089 !frame_aligned(runtime, iov->iov_len)) 3090 return -EINVAL; 3091 frames = bytes_to_samples(runtime, iov->iov_len); 3092 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL); 3093 if (bufs == NULL) 3094 return -ENOMEM; 3095 for (i = 0; i < nr_segs; ++i) 3096 bufs[i] = iov[i].iov_base; 3097 result = snd_pcm_lib_writev(substream, bufs, frames); 3098 if (result > 0) 3099 result = frames_to_bytes(runtime, result); 3100 kfree(bufs); 3101 return result; 3102 } 3103 3104 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait) 3105 { 3106 struct snd_pcm_file *pcm_file; 3107 struct snd_pcm_substream *substream; 3108 struct snd_pcm_runtime *runtime; 3109 unsigned int mask; 3110 snd_pcm_uframes_t avail; 3111 3112 pcm_file = file->private_data; 3113 3114 substream = pcm_file->substream; 3115 if (PCM_RUNTIME_CHECK(substream)) 3116 return -ENXIO; 3117 runtime = substream->runtime; 3118 3119 poll_wait(file, &runtime->sleep, wait); 3120 3121 snd_pcm_stream_lock_irq(substream); 3122 avail = snd_pcm_playback_avail(runtime); 3123 switch (runtime->status->state) { 3124 case SNDRV_PCM_STATE_RUNNING: 3125 case SNDRV_PCM_STATE_PREPARED: 3126 case SNDRV_PCM_STATE_PAUSED: 3127 if (avail >= runtime->control->avail_min) { 3128 mask = POLLOUT | POLLWRNORM; 3129 break; 3130 } 3131 /* Fall through */ 3132 case SNDRV_PCM_STATE_DRAINING: 3133 mask = 0; 3134 break; 3135 default: 3136 mask = POLLOUT | POLLWRNORM | POLLERR; 3137 break; 3138 } 3139 snd_pcm_stream_unlock_irq(substream); 3140 return mask; 3141 } 3142 3143 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait) 3144 { 3145 struct snd_pcm_file *pcm_file; 3146 struct snd_pcm_substream *substream; 3147 struct snd_pcm_runtime *runtime; 3148 unsigned int mask; 3149 snd_pcm_uframes_t avail; 3150 3151 pcm_file = file->private_data; 3152 3153 substream = pcm_file->substream; 3154 if (PCM_RUNTIME_CHECK(substream)) 3155 return -ENXIO; 3156 runtime = substream->runtime; 3157 3158 poll_wait(file, &runtime->sleep, wait); 3159 3160 snd_pcm_stream_lock_irq(substream); 3161 avail = snd_pcm_capture_avail(runtime); 3162 switch (runtime->status->state) { 3163 case SNDRV_PCM_STATE_RUNNING: 3164 case SNDRV_PCM_STATE_PREPARED: 3165 case SNDRV_PCM_STATE_PAUSED: 3166 if (avail >= runtime->control->avail_min) { 3167 mask = POLLIN | POLLRDNORM; 3168 break; 3169 } 3170 mask = 0; 3171 break; 3172 case SNDRV_PCM_STATE_DRAINING: 3173 if (avail > 0) { 3174 mask = POLLIN | POLLRDNORM; 3175 break; 3176 } 3177 /* Fall through */ 3178 default: 3179 mask = POLLIN | POLLRDNORM | POLLERR; 3180 break; 3181 } 3182 snd_pcm_stream_unlock_irq(substream); 3183 return mask; 3184 } 3185 3186 /* 3187 * mmap support 3188 */ 3189 3190 /* 3191 * Only on coherent architectures, we can mmap the status and the control records 3192 * for effcient data transfer. On others, we have to use HWSYNC ioctl... 3193 */ 3194 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) 3195 /* 3196 * mmap status record 3197 */ 3198 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area, 3199 struct vm_fault *vmf) 3200 { 3201 struct snd_pcm_substream *substream = area->vm_private_data; 3202 struct snd_pcm_runtime *runtime; 3203 3204 if (substream == NULL) 3205 return VM_FAULT_SIGBUS; 3206 runtime = substream->runtime; 3207 vmf->page = virt_to_page(runtime->status); 3208 get_page(vmf->page); 3209 return 0; 3210 } 3211 3212 static const struct vm_operations_struct snd_pcm_vm_ops_status = 3213 { 3214 .fault = snd_pcm_mmap_status_fault, 3215 }; 3216 3217 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, 3218 struct vm_area_struct *area) 3219 { 3220 long size; 3221 if (!(area->vm_flags & VM_READ)) 3222 return -EINVAL; 3223 size = area->vm_end - area->vm_start; 3224 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))) 3225 return -EINVAL; 3226 area->vm_ops = &snd_pcm_vm_ops_status; 3227 area->vm_private_data = substream; 3228 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; 3229 return 0; 3230 } 3231 3232 /* 3233 * mmap control record 3234 */ 3235 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area, 3236 struct vm_fault *vmf) 3237 { 3238 struct snd_pcm_substream *substream = area->vm_private_data; 3239 struct snd_pcm_runtime *runtime; 3240 3241 if (substream == NULL) 3242 return VM_FAULT_SIGBUS; 3243 runtime = substream->runtime; 3244 vmf->page = virt_to_page(runtime->control); 3245 get_page(vmf->page); 3246 return 0; 3247 } 3248 3249 static const struct vm_operations_struct snd_pcm_vm_ops_control = 3250 { 3251 .fault = snd_pcm_mmap_control_fault, 3252 }; 3253 3254 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, 3255 struct vm_area_struct *area) 3256 { 3257 long size; 3258 if (!(area->vm_flags & VM_READ)) 3259 return -EINVAL; 3260 size = area->vm_end - area->vm_start; 3261 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))) 3262 return -EINVAL; 3263 area->vm_ops = &snd_pcm_vm_ops_control; 3264 area->vm_private_data = substream; 3265 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; 3266 return 0; 3267 } 3268 #else /* ! coherent mmap */ 3269 /* 3270 * don't support mmap for status and control records. 3271 */ 3272 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, 3273 struct vm_area_struct *area) 3274 { 3275 return -ENXIO; 3276 } 3277 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, 3278 struct vm_area_struct *area) 3279 { 3280 return -ENXIO; 3281 } 3282 #endif /* coherent mmap */ 3283 3284 static inline struct page * 3285 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs) 3286 { 3287 void *vaddr = substream->runtime->dma_area + ofs; 3288 return virt_to_page(vaddr); 3289 } 3290 3291 /* 3292 * fault callback for mmapping a RAM page 3293 */ 3294 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area, 3295 struct vm_fault *vmf) 3296 { 3297 struct snd_pcm_substream *substream = area->vm_private_data; 3298 struct snd_pcm_runtime *runtime; 3299 unsigned long offset; 3300 struct page * page; 3301 size_t dma_bytes; 3302 3303 if (substream == NULL) 3304 return VM_FAULT_SIGBUS; 3305 runtime = substream->runtime; 3306 offset = vmf->pgoff << PAGE_SHIFT; 3307 dma_bytes = PAGE_ALIGN(runtime->dma_bytes); 3308 if (offset > dma_bytes - PAGE_SIZE) 3309 return VM_FAULT_SIGBUS; 3310 if (substream->ops->page) 3311 page = substream->ops->page(substream, offset); 3312 else 3313 page = snd_pcm_default_page_ops(substream, offset); 3314 if (!page) 3315 return VM_FAULT_SIGBUS; 3316 get_page(page); 3317 vmf->page = page; 3318 return 0; 3319 } 3320 3321 static const struct vm_operations_struct snd_pcm_vm_ops_data = { 3322 .open = snd_pcm_mmap_data_open, 3323 .close = snd_pcm_mmap_data_close, 3324 }; 3325 3326 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = { 3327 .open = snd_pcm_mmap_data_open, 3328 .close = snd_pcm_mmap_data_close, 3329 .fault = snd_pcm_mmap_data_fault, 3330 }; 3331 3332 /* 3333 * mmap the DMA buffer on RAM 3334 */ 3335 3336 /** 3337 * snd_pcm_lib_default_mmap - Default PCM data mmap function 3338 * @substream: PCM substream 3339 * @area: VMA 3340 * 3341 * This is the default mmap handler for PCM data. When mmap pcm_ops is NULL, 3342 * this function is invoked implicitly. 3343 */ 3344 int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream, 3345 struct vm_area_struct *area) 3346 { 3347 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; 3348 #ifdef CONFIG_GENERIC_ALLOCATOR 3349 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_IRAM) { 3350 area->vm_page_prot = pgprot_writecombine(area->vm_page_prot); 3351 return remap_pfn_range(area, area->vm_start, 3352 substream->dma_buffer.addr >> PAGE_SHIFT, 3353 area->vm_end - area->vm_start, area->vm_page_prot); 3354 } 3355 #endif /* CONFIG_GENERIC_ALLOCATOR */ 3356 #ifndef CONFIG_X86 /* for avoiding warnings arch/x86/mm/pat.c */ 3357 if (!substream->ops->page && 3358 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) 3359 return dma_mmap_coherent(substream->dma_buffer.dev.dev, 3360 area, 3361 substream->runtime->dma_area, 3362 substream->runtime->dma_addr, 3363 area->vm_end - area->vm_start); 3364 #endif /* CONFIG_X86 */ 3365 /* mmap with fault handler */ 3366 area->vm_ops = &snd_pcm_vm_ops_data_fault; 3367 return 0; 3368 } 3369 EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap); 3370 3371 /* 3372 * mmap the DMA buffer on I/O memory area 3373 */ 3374 #if SNDRV_PCM_INFO_MMAP_IOMEM 3375 /** 3376 * snd_pcm_lib_mmap_iomem - Default PCM data mmap function for I/O mem 3377 * @substream: PCM substream 3378 * @area: VMA 3379 * 3380 * When your hardware uses the iomapped pages as the hardware buffer and 3381 * wants to mmap it, pass this function as mmap pcm_ops. Note that this 3382 * is supposed to work only on limited architectures. 3383 */ 3384 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, 3385 struct vm_area_struct *area) 3386 { 3387 struct snd_pcm_runtime *runtime = substream->runtime;; 3388 3389 area->vm_page_prot = pgprot_noncached(area->vm_page_prot); 3390 return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes); 3391 } 3392 3393 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem); 3394 #endif /* SNDRV_PCM_INFO_MMAP */ 3395 3396 /* 3397 * mmap DMA buffer 3398 */ 3399 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, 3400 struct vm_area_struct *area) 3401 { 3402 struct snd_pcm_runtime *runtime; 3403 long size; 3404 unsigned long offset; 3405 size_t dma_bytes; 3406 int err; 3407 3408 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 3409 if (!(area->vm_flags & (VM_WRITE|VM_READ))) 3410 return -EINVAL; 3411 } else { 3412 if (!(area->vm_flags & VM_READ)) 3413 return -EINVAL; 3414 } 3415 runtime = substream->runtime; 3416 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 3417 return -EBADFD; 3418 if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) 3419 return -ENXIO; 3420 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || 3421 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) 3422 return -EINVAL; 3423 size = area->vm_end - area->vm_start; 3424 offset = area->vm_pgoff << PAGE_SHIFT; 3425 dma_bytes = PAGE_ALIGN(runtime->dma_bytes); 3426 if ((size_t)size > dma_bytes) 3427 return -EINVAL; 3428 if (offset > dma_bytes - size) 3429 return -EINVAL; 3430 3431 area->vm_ops = &snd_pcm_vm_ops_data; 3432 area->vm_private_data = substream; 3433 if (substream->ops->mmap) 3434 err = substream->ops->mmap(substream, area); 3435 else 3436 err = snd_pcm_lib_default_mmap(substream, area); 3437 if (!err) 3438 atomic_inc(&substream->mmap_count); 3439 return err; 3440 } 3441 3442 EXPORT_SYMBOL(snd_pcm_mmap_data); 3443 3444 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area) 3445 { 3446 struct snd_pcm_file * pcm_file; 3447 struct snd_pcm_substream *substream; 3448 unsigned long offset; 3449 3450 pcm_file = file->private_data; 3451 substream = pcm_file->substream; 3452 if (PCM_RUNTIME_CHECK(substream)) 3453 return -ENXIO; 3454 3455 offset = area->vm_pgoff << PAGE_SHIFT; 3456 switch (offset) { 3457 case SNDRV_PCM_MMAP_OFFSET_STATUS: 3458 if (pcm_file->no_compat_mmap) 3459 return -ENXIO; 3460 return snd_pcm_mmap_status(substream, file, area); 3461 case SNDRV_PCM_MMAP_OFFSET_CONTROL: 3462 if (pcm_file->no_compat_mmap) 3463 return -ENXIO; 3464 return snd_pcm_mmap_control(substream, file, area); 3465 default: 3466 return snd_pcm_mmap_data(substream, file, area); 3467 } 3468 return 0; 3469 } 3470 3471 static int snd_pcm_fasync(int fd, struct file * file, int on) 3472 { 3473 struct snd_pcm_file * pcm_file; 3474 struct snd_pcm_substream *substream; 3475 struct snd_pcm_runtime *runtime; 3476 3477 pcm_file = file->private_data; 3478 substream = pcm_file->substream; 3479 if (PCM_RUNTIME_CHECK(substream)) 3480 return -ENXIO; 3481 runtime = substream->runtime; 3482 return fasync_helper(fd, file, on, &runtime->fasync); 3483 } 3484 3485 /* 3486 * ioctl32 compat 3487 */ 3488 #ifdef CONFIG_COMPAT 3489 #include "pcm_compat.c" 3490 #else 3491 #define snd_pcm_ioctl_compat NULL 3492 #endif 3493 3494 /* 3495 * To be removed helpers to keep binary compatibility 3496 */ 3497 3498 #ifdef CONFIG_SND_SUPPORT_OLD_API 3499 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5)) 3500 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5)) 3501 3502 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params, 3503 struct snd_pcm_hw_params_old *oparams) 3504 { 3505 unsigned int i; 3506 3507 memset(params, 0, sizeof(*params)); 3508 params->flags = oparams->flags; 3509 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) 3510 params->masks[i].bits[0] = oparams->masks[i]; 3511 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals)); 3512 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask); 3513 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask); 3514 params->info = oparams->info; 3515 params->msbits = oparams->msbits; 3516 params->rate_num = oparams->rate_num; 3517 params->rate_den = oparams->rate_den; 3518 params->fifo_size = oparams->fifo_size; 3519 } 3520 3521 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams, 3522 struct snd_pcm_hw_params *params) 3523 { 3524 unsigned int i; 3525 3526 memset(oparams, 0, sizeof(*oparams)); 3527 oparams->flags = params->flags; 3528 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) 3529 oparams->masks[i] = params->masks[i].bits[0]; 3530 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals)); 3531 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask); 3532 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask); 3533 oparams->info = params->info; 3534 oparams->msbits = params->msbits; 3535 oparams->rate_num = params->rate_num; 3536 oparams->rate_den = params->rate_den; 3537 oparams->fifo_size = params->fifo_size; 3538 } 3539 3540 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, 3541 struct snd_pcm_hw_params_old __user * _oparams) 3542 { 3543 struct snd_pcm_hw_params *params; 3544 struct snd_pcm_hw_params_old *oparams = NULL; 3545 int err; 3546 3547 params = kmalloc(sizeof(*params), GFP_KERNEL); 3548 if (!params) 3549 return -ENOMEM; 3550 3551 oparams = memdup_user(_oparams, sizeof(*oparams)); 3552 if (IS_ERR(oparams)) { 3553 err = PTR_ERR(oparams); 3554 goto out; 3555 } 3556 snd_pcm_hw_convert_from_old_params(params, oparams); 3557 err = snd_pcm_hw_refine(substream, params); 3558 snd_pcm_hw_convert_to_old_params(oparams, params); 3559 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { 3560 if (!err) 3561 err = -EFAULT; 3562 } 3563 3564 kfree(oparams); 3565 out: 3566 kfree(params); 3567 return err; 3568 } 3569 3570 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, 3571 struct snd_pcm_hw_params_old __user * _oparams) 3572 { 3573 struct snd_pcm_hw_params *params; 3574 struct snd_pcm_hw_params_old *oparams = NULL; 3575 int err; 3576 3577 params = kmalloc(sizeof(*params), GFP_KERNEL); 3578 if (!params) 3579 return -ENOMEM; 3580 3581 oparams = memdup_user(_oparams, sizeof(*oparams)); 3582 if (IS_ERR(oparams)) { 3583 err = PTR_ERR(oparams); 3584 goto out; 3585 } 3586 snd_pcm_hw_convert_from_old_params(params, oparams); 3587 err = snd_pcm_hw_params(substream, params); 3588 snd_pcm_hw_convert_to_old_params(oparams, params); 3589 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { 3590 if (!err) 3591 err = -EFAULT; 3592 } 3593 3594 kfree(oparams); 3595 out: 3596 kfree(params); 3597 return err; 3598 } 3599 #endif /* CONFIG_SND_SUPPORT_OLD_API */ 3600 3601 #ifndef CONFIG_MMU 3602 static unsigned long snd_pcm_get_unmapped_area(struct file *file, 3603 unsigned long addr, 3604 unsigned long len, 3605 unsigned long pgoff, 3606 unsigned long flags) 3607 { 3608 struct snd_pcm_file *pcm_file = file->private_data; 3609 struct snd_pcm_substream *substream = pcm_file->substream; 3610 struct snd_pcm_runtime *runtime = substream->runtime; 3611 unsigned long offset = pgoff << PAGE_SHIFT; 3612 3613 switch (offset) { 3614 case SNDRV_PCM_MMAP_OFFSET_STATUS: 3615 return (unsigned long)runtime->status; 3616 case SNDRV_PCM_MMAP_OFFSET_CONTROL: 3617 return (unsigned long)runtime->control; 3618 default: 3619 return (unsigned long)runtime->dma_area + offset; 3620 } 3621 } 3622 #else 3623 # define snd_pcm_get_unmapped_area NULL 3624 #endif 3625 3626 /* 3627 * Register section 3628 */ 3629 3630 const struct file_operations snd_pcm_f_ops[2] = { 3631 { 3632 .owner = THIS_MODULE, 3633 .write = snd_pcm_write, 3634 .aio_write = snd_pcm_aio_write, 3635 .open = snd_pcm_playback_open, 3636 .release = snd_pcm_release, 3637 .llseek = no_llseek, 3638 .poll = snd_pcm_playback_poll, 3639 .unlocked_ioctl = snd_pcm_playback_ioctl, 3640 .compat_ioctl = snd_pcm_ioctl_compat, 3641 .mmap = snd_pcm_mmap, 3642 .fasync = snd_pcm_fasync, 3643 .get_unmapped_area = snd_pcm_get_unmapped_area, 3644 }, 3645 { 3646 .owner = THIS_MODULE, 3647 .read = snd_pcm_read, 3648 .aio_read = snd_pcm_aio_read, 3649 .open = snd_pcm_capture_open, 3650 .release = snd_pcm_release, 3651 .llseek = no_llseek, 3652 .poll = snd_pcm_capture_poll, 3653 .unlocked_ioctl = snd_pcm_capture_ioctl, 3654 .compat_ioctl = snd_pcm_ioctl_compat, 3655 .mmap = snd_pcm_mmap, 3656 .fasync = snd_pcm_fasync, 3657 .get_unmapped_area = snd_pcm_get_unmapped_area, 3658 } 3659 }; 3660