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 } else { 1556 runtime->status->state = SNDRV_PCM_STATE_SETUP; 1557 } 1558 break; 1559 case SNDRV_PCM_STATE_RUNNING: 1560 runtime->status->state = SNDRV_PCM_STATE_DRAINING; 1561 break; 1562 case SNDRV_PCM_STATE_XRUN: 1563 runtime->status->state = SNDRV_PCM_STATE_SETUP; 1564 break; 1565 default: 1566 break; 1567 } 1568 } else { 1569 /* stop running stream */ 1570 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) { 1571 int new_state = snd_pcm_capture_avail(runtime) > 0 ? 1572 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP; 1573 snd_pcm_do_stop(substream, new_state); 1574 snd_pcm_post_stop(substream, new_state); 1575 } 1576 } 1577 1578 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING && 1579 runtime->trigger_master == substream && 1580 (runtime->hw.info & SNDRV_PCM_INFO_DRAIN_TRIGGER)) 1581 return substream->ops->trigger(substream, 1582 SNDRV_PCM_TRIGGER_DRAIN); 1583 1584 return 0; 1585 } 1586 1587 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state) 1588 { 1589 } 1590 1591 static struct action_ops snd_pcm_action_drain_init = { 1592 .pre_action = snd_pcm_pre_drain_init, 1593 .do_action = snd_pcm_do_drain_init, 1594 .post_action = snd_pcm_post_drain_init 1595 }; 1596 1597 static int snd_pcm_drop(struct snd_pcm_substream *substream); 1598 1599 /* 1600 * Drain the stream(s). 1601 * When the substream is linked, sync until the draining of all playback streams 1602 * is finished. 1603 * After this call, all streams are supposed to be either SETUP or DRAINING 1604 * (capture only) state. 1605 */ 1606 static int snd_pcm_drain(struct snd_pcm_substream *substream, 1607 struct file *file) 1608 { 1609 struct snd_card *card; 1610 struct snd_pcm_runtime *runtime; 1611 struct snd_pcm_substream *s; 1612 wait_queue_t wait; 1613 int result = 0; 1614 int nonblock = 0; 1615 1616 card = substream->pcm->card; 1617 runtime = substream->runtime; 1618 1619 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 1620 return -EBADFD; 1621 1622 snd_power_lock(card); 1623 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1624 result = snd_power_wait(card, SNDRV_CTL_POWER_D0); 1625 if (result < 0) { 1626 snd_power_unlock(card); 1627 return result; 1628 } 1629 } 1630 1631 if (file) { 1632 if (file->f_flags & O_NONBLOCK) 1633 nonblock = 1; 1634 } else if (substream->f_flags & O_NONBLOCK) 1635 nonblock = 1; 1636 1637 down_read(&snd_pcm_link_rwsem); 1638 snd_pcm_stream_lock_irq(substream); 1639 /* resume pause */ 1640 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) 1641 snd_pcm_pause(substream, 0); 1642 1643 /* pre-start/stop - all running streams are changed to DRAINING state */ 1644 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0); 1645 if (result < 0) 1646 goto unlock; 1647 /* in non-blocking, we don't wait in ioctl but let caller poll */ 1648 if (nonblock) { 1649 result = -EAGAIN; 1650 goto unlock; 1651 } 1652 1653 for (;;) { 1654 long tout; 1655 struct snd_pcm_runtime *to_check; 1656 if (signal_pending(current)) { 1657 result = -ERESTARTSYS; 1658 break; 1659 } 1660 /* find a substream to drain */ 1661 to_check = NULL; 1662 snd_pcm_group_for_each_entry(s, substream) { 1663 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK) 1664 continue; 1665 runtime = s->runtime; 1666 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 1667 to_check = runtime; 1668 break; 1669 } 1670 } 1671 if (!to_check) 1672 break; /* all drained */ 1673 init_waitqueue_entry(&wait, current); 1674 add_wait_queue(&to_check->sleep, &wait); 1675 snd_pcm_stream_unlock_irq(substream); 1676 up_read(&snd_pcm_link_rwsem); 1677 snd_power_unlock(card); 1678 if (runtime->no_period_wakeup) 1679 tout = MAX_SCHEDULE_TIMEOUT; 1680 else { 1681 tout = 10; 1682 if (runtime->rate) { 1683 long t = runtime->period_size * 2 / runtime->rate; 1684 tout = max(t, tout); 1685 } 1686 tout = msecs_to_jiffies(tout * 1000); 1687 } 1688 tout = schedule_timeout_interruptible(tout); 1689 snd_power_lock(card); 1690 down_read(&snd_pcm_link_rwsem); 1691 snd_pcm_stream_lock_irq(substream); 1692 remove_wait_queue(&to_check->sleep, &wait); 1693 if (card->shutdown) { 1694 result = -ENODEV; 1695 break; 1696 } 1697 if (tout == 0) { 1698 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1699 result = -ESTRPIPE; 1700 else { 1701 dev_dbg(substream->pcm->card->dev, 1702 "playback drain error (DMA or IRQ trouble?)\n"); 1703 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1704 result = -EIO; 1705 } 1706 break; 1707 } 1708 } 1709 1710 unlock: 1711 snd_pcm_stream_unlock_irq(substream); 1712 up_read(&snd_pcm_link_rwsem); 1713 snd_power_unlock(card); 1714 1715 return result; 1716 } 1717 1718 /* 1719 * drop ioctl 1720 * 1721 * Immediately put all linked substreams into SETUP state. 1722 */ 1723 static int snd_pcm_drop(struct snd_pcm_substream *substream) 1724 { 1725 struct snd_pcm_runtime *runtime; 1726 int result = 0; 1727 1728 if (PCM_RUNTIME_CHECK(substream)) 1729 return -ENXIO; 1730 runtime = substream->runtime; 1731 1732 if (runtime->status->state == SNDRV_PCM_STATE_OPEN || 1733 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED || 1734 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1735 return -EBADFD; 1736 1737 snd_pcm_stream_lock_irq(substream); 1738 /* resume pause */ 1739 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) 1740 snd_pcm_pause(substream, 0); 1741 1742 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1743 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */ 1744 snd_pcm_stream_unlock_irq(substream); 1745 1746 return result; 1747 } 1748 1749 1750 static bool is_pcm_file(struct file *file) 1751 { 1752 struct inode *inode = file_inode(file); 1753 unsigned int minor; 1754 1755 if (!S_ISCHR(inode->i_mode) || imajor(inode) != snd_major) 1756 return false; 1757 minor = iminor(inode); 1758 return snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) || 1759 snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE); 1760 } 1761 1762 /* 1763 * PCM link handling 1764 */ 1765 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd) 1766 { 1767 int res = 0; 1768 struct snd_pcm_file *pcm_file; 1769 struct snd_pcm_substream *substream1; 1770 struct snd_pcm_group *group; 1771 struct fd f = fdget(fd); 1772 1773 if (!f.file) 1774 return -EBADFD; 1775 if (!is_pcm_file(f.file)) { 1776 res = -EBADFD; 1777 goto _badf; 1778 } 1779 pcm_file = f.file->private_data; 1780 substream1 = pcm_file->substream; 1781 group = kmalloc(sizeof(*group), GFP_KERNEL); 1782 if (!group) { 1783 res = -ENOMEM; 1784 goto _nolock; 1785 } 1786 down_write(&snd_pcm_link_rwsem); 1787 write_lock_irq(&snd_pcm_link_rwlock); 1788 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN || 1789 substream->runtime->status->state != substream1->runtime->status->state || 1790 substream->pcm->nonatomic != substream1->pcm->nonatomic) { 1791 res = -EBADFD; 1792 goto _end; 1793 } 1794 if (snd_pcm_stream_linked(substream1)) { 1795 res = -EALREADY; 1796 goto _end; 1797 } 1798 if (!snd_pcm_stream_linked(substream)) { 1799 substream->group = group; 1800 group = NULL; 1801 spin_lock_init(&substream->group->lock); 1802 mutex_init(&substream->group->mutex); 1803 INIT_LIST_HEAD(&substream->group->substreams); 1804 list_add_tail(&substream->link_list, &substream->group->substreams); 1805 substream->group->count = 1; 1806 } 1807 list_add_tail(&substream1->link_list, &substream->group->substreams); 1808 substream->group->count++; 1809 substream1->group = substream->group; 1810 _end: 1811 write_unlock_irq(&snd_pcm_link_rwlock); 1812 up_write(&snd_pcm_link_rwsem); 1813 _nolock: 1814 snd_card_unref(substream1->pcm->card); 1815 kfree(group); 1816 _badf: 1817 fdput(f); 1818 return res; 1819 } 1820 1821 static void relink_to_local(struct snd_pcm_substream *substream) 1822 { 1823 substream->group = &substream->self_group; 1824 INIT_LIST_HEAD(&substream->self_group.substreams); 1825 list_add_tail(&substream->link_list, &substream->self_group.substreams); 1826 } 1827 1828 static int snd_pcm_unlink(struct snd_pcm_substream *substream) 1829 { 1830 struct snd_pcm_substream *s; 1831 int res = 0; 1832 1833 down_write(&snd_pcm_link_rwsem); 1834 write_lock_irq(&snd_pcm_link_rwlock); 1835 if (!snd_pcm_stream_linked(substream)) { 1836 res = -EALREADY; 1837 goto _end; 1838 } 1839 list_del(&substream->link_list); 1840 substream->group->count--; 1841 if (substream->group->count == 1) { /* detach the last stream, too */ 1842 snd_pcm_group_for_each_entry(s, substream) { 1843 relink_to_local(s); 1844 break; 1845 } 1846 kfree(substream->group); 1847 } 1848 relink_to_local(substream); 1849 _end: 1850 write_unlock_irq(&snd_pcm_link_rwlock); 1851 up_write(&snd_pcm_link_rwsem); 1852 return res; 1853 } 1854 1855 /* 1856 * hw configurator 1857 */ 1858 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params, 1859 struct snd_pcm_hw_rule *rule) 1860 { 1861 struct snd_interval t; 1862 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]), 1863 hw_param_interval_c(params, rule->deps[1]), &t); 1864 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1865 } 1866 1867 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params, 1868 struct snd_pcm_hw_rule *rule) 1869 { 1870 struct snd_interval t; 1871 snd_interval_div(hw_param_interval_c(params, rule->deps[0]), 1872 hw_param_interval_c(params, rule->deps[1]), &t); 1873 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1874 } 1875 1876 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params, 1877 struct snd_pcm_hw_rule *rule) 1878 { 1879 struct snd_interval t; 1880 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]), 1881 hw_param_interval_c(params, rule->deps[1]), 1882 (unsigned long) rule->private, &t); 1883 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1884 } 1885 1886 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params, 1887 struct snd_pcm_hw_rule *rule) 1888 { 1889 struct snd_interval t; 1890 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]), 1891 (unsigned long) rule->private, 1892 hw_param_interval_c(params, rule->deps[1]), &t); 1893 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1894 } 1895 1896 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params, 1897 struct snd_pcm_hw_rule *rule) 1898 { 1899 unsigned int k; 1900 struct snd_interval *i = hw_param_interval(params, rule->deps[0]); 1901 struct snd_mask m; 1902 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 1903 snd_mask_any(&m); 1904 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { 1905 int bits; 1906 if (! snd_mask_test(mask, k)) 1907 continue; 1908 bits = snd_pcm_format_physical_width(k); 1909 if (bits <= 0) 1910 continue; /* ignore invalid formats */ 1911 if ((unsigned)bits < i->min || (unsigned)bits > i->max) 1912 snd_mask_reset(&m, k); 1913 } 1914 return snd_mask_refine(mask, &m); 1915 } 1916 1917 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params, 1918 struct snd_pcm_hw_rule *rule) 1919 { 1920 struct snd_interval t; 1921 unsigned int k; 1922 t.min = UINT_MAX; 1923 t.max = 0; 1924 t.openmin = 0; 1925 t.openmax = 0; 1926 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { 1927 int bits; 1928 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k)) 1929 continue; 1930 bits = snd_pcm_format_physical_width(k); 1931 if (bits <= 0) 1932 continue; /* ignore invalid formats */ 1933 if (t.min > (unsigned)bits) 1934 t.min = bits; 1935 if (t.max < (unsigned)bits) 1936 t.max = bits; 1937 } 1938 t.integer = 1; 1939 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1940 } 1941 1942 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12 1943 #error "Change this table" 1944 #endif 1945 1946 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100, 1947 48000, 64000, 88200, 96000, 176400, 192000 }; 1948 1949 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = { 1950 .count = ARRAY_SIZE(rates), 1951 .list = rates, 1952 }; 1953 1954 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params, 1955 struct snd_pcm_hw_rule *rule) 1956 { 1957 struct snd_pcm_hardware *hw = rule->private; 1958 return snd_interval_list(hw_param_interval(params, rule->var), 1959 snd_pcm_known_rates.count, 1960 snd_pcm_known_rates.list, hw->rates); 1961 } 1962 1963 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params, 1964 struct snd_pcm_hw_rule *rule) 1965 { 1966 struct snd_interval t; 1967 struct snd_pcm_substream *substream = rule->private; 1968 t.min = 0; 1969 t.max = substream->buffer_bytes_max; 1970 t.openmin = 0; 1971 t.openmax = 0; 1972 t.integer = 1; 1973 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1974 } 1975 1976 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream) 1977 { 1978 struct snd_pcm_runtime *runtime = substream->runtime; 1979 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; 1980 int k, err; 1981 1982 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { 1983 snd_mask_any(constrs_mask(constrs, k)); 1984 } 1985 1986 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { 1987 snd_interval_any(constrs_interval(constrs, k)); 1988 } 1989 1990 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS)); 1991 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)); 1992 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)); 1993 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)); 1994 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS)); 1995 1996 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, 1997 snd_pcm_hw_rule_format, NULL, 1998 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1999 if (err < 0) 2000 return err; 2001 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 2002 snd_pcm_hw_rule_sample_bits, NULL, 2003 SNDRV_PCM_HW_PARAM_FORMAT, 2004 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 2005 if (err < 0) 2006 return err; 2007 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 2008 snd_pcm_hw_rule_div, NULL, 2009 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); 2010 if (err < 0) 2011 return err; 2012 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 2013 snd_pcm_hw_rule_mul, NULL, 2014 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); 2015 if (err < 0) 2016 return err; 2017 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 2018 snd_pcm_hw_rule_mulkdiv, (void*) 8, 2019 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 2020 if (err < 0) 2021 return err; 2022 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 2023 snd_pcm_hw_rule_mulkdiv, (void*) 8, 2024 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1); 2025 if (err < 0) 2026 return err; 2027 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 2028 snd_pcm_hw_rule_div, NULL, 2029 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 2030 if (err < 0) 2031 return err; 2032 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 2033 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 2034 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1); 2035 if (err < 0) 2036 return err; 2037 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 2038 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 2039 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1); 2040 if (err < 0) 2041 return err; 2042 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, 2043 snd_pcm_hw_rule_div, NULL, 2044 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 2045 if (err < 0) 2046 return err; 2047 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 2048 snd_pcm_hw_rule_div, NULL, 2049 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); 2050 if (err < 0) 2051 return err; 2052 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 2053 snd_pcm_hw_rule_mulkdiv, (void*) 8, 2054 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 2055 if (err < 0) 2056 return err; 2057 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 2058 snd_pcm_hw_rule_muldivk, (void*) 1000000, 2059 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); 2060 if (err < 0) 2061 return err; 2062 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 2063 snd_pcm_hw_rule_mul, NULL, 2064 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); 2065 if (err < 0) 2066 return err; 2067 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 2068 snd_pcm_hw_rule_mulkdiv, (void*) 8, 2069 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 2070 if (err < 0) 2071 return err; 2072 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 2073 snd_pcm_hw_rule_muldivk, (void*) 1000000, 2074 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); 2075 if (err < 0) 2076 return err; 2077 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 2078 snd_pcm_hw_rule_muldivk, (void*) 8, 2079 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 2080 if (err < 0) 2081 return err; 2082 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 2083 snd_pcm_hw_rule_muldivk, (void*) 8, 2084 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 2085 if (err < 0) 2086 return err; 2087 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 2088 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 2089 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); 2090 if (err < 0) 2091 return err; 2092 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME, 2093 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 2094 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); 2095 if (err < 0) 2096 return err; 2097 return 0; 2098 } 2099 2100 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream) 2101 { 2102 struct snd_pcm_runtime *runtime = substream->runtime; 2103 struct snd_pcm_hardware *hw = &runtime->hw; 2104 int err; 2105 unsigned int mask = 0; 2106 2107 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) 2108 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED; 2109 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) 2110 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED; 2111 if (hw_support_mmap(substream)) { 2112 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) 2113 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; 2114 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) 2115 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED; 2116 if (hw->info & SNDRV_PCM_INFO_COMPLEX) 2117 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX; 2118 } 2119 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask); 2120 if (err < 0) 2121 return err; 2122 2123 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats); 2124 if (err < 0) 2125 return err; 2126 2127 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD); 2128 if (err < 0) 2129 return err; 2130 2131 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, 2132 hw->channels_min, hw->channels_max); 2133 if (err < 0) 2134 return err; 2135 2136 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE, 2137 hw->rate_min, hw->rate_max); 2138 if (err < 0) 2139 return err; 2140 2141 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 2142 hw->period_bytes_min, hw->period_bytes_max); 2143 if (err < 0) 2144 return err; 2145 2146 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS, 2147 hw->periods_min, hw->periods_max); 2148 if (err < 0) 2149 return err; 2150 2151 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 2152 hw->period_bytes_min, hw->buffer_bytes_max); 2153 if (err < 0) 2154 return err; 2155 2156 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 2157 snd_pcm_hw_rule_buffer_bytes_max, substream, 2158 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1); 2159 if (err < 0) 2160 return err; 2161 2162 /* FIXME: remove */ 2163 if (runtime->dma_bytes) { 2164 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes); 2165 if (err < 0) 2166 return err; 2167 } 2168 2169 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) { 2170 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 2171 snd_pcm_hw_rule_rate, hw, 2172 SNDRV_PCM_HW_PARAM_RATE, -1); 2173 if (err < 0) 2174 return err; 2175 } 2176 2177 /* FIXME: this belong to lowlevel */ 2178 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE); 2179 2180 return 0; 2181 } 2182 2183 static void pcm_release_private(struct snd_pcm_substream *substream) 2184 { 2185 snd_pcm_unlink(substream); 2186 } 2187 2188 void snd_pcm_release_substream(struct snd_pcm_substream *substream) 2189 { 2190 substream->ref_count--; 2191 if (substream->ref_count > 0) 2192 return; 2193 2194 snd_pcm_drop(substream); 2195 if (substream->hw_opened) { 2196 if (substream->ops->hw_free != NULL) 2197 substream->ops->hw_free(substream); 2198 substream->ops->close(substream); 2199 substream->hw_opened = 0; 2200 } 2201 if (pm_qos_request_active(&substream->latency_pm_qos_req)) 2202 pm_qos_remove_request(&substream->latency_pm_qos_req); 2203 if (substream->pcm_release) { 2204 substream->pcm_release(substream); 2205 substream->pcm_release = NULL; 2206 } 2207 snd_pcm_detach_substream(substream); 2208 } 2209 2210 EXPORT_SYMBOL(snd_pcm_release_substream); 2211 2212 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, 2213 struct file *file, 2214 struct snd_pcm_substream **rsubstream) 2215 { 2216 struct snd_pcm_substream *substream; 2217 int err; 2218 2219 err = snd_pcm_attach_substream(pcm, stream, file, &substream); 2220 if (err < 0) 2221 return err; 2222 if (substream->ref_count > 1) { 2223 *rsubstream = substream; 2224 return 0; 2225 } 2226 2227 err = snd_pcm_hw_constraints_init(substream); 2228 if (err < 0) { 2229 pcm_dbg(pcm, "snd_pcm_hw_constraints_init failed\n"); 2230 goto error; 2231 } 2232 2233 if ((err = substream->ops->open(substream)) < 0) 2234 goto error; 2235 2236 substream->hw_opened = 1; 2237 2238 err = snd_pcm_hw_constraints_complete(substream); 2239 if (err < 0) { 2240 pcm_dbg(pcm, "snd_pcm_hw_constraints_complete failed\n"); 2241 goto error; 2242 } 2243 2244 *rsubstream = substream; 2245 return 0; 2246 2247 error: 2248 snd_pcm_release_substream(substream); 2249 return err; 2250 } 2251 2252 EXPORT_SYMBOL(snd_pcm_open_substream); 2253 2254 static int snd_pcm_open_file(struct file *file, 2255 struct snd_pcm *pcm, 2256 int stream) 2257 { 2258 struct snd_pcm_file *pcm_file; 2259 struct snd_pcm_substream *substream; 2260 int err; 2261 2262 err = snd_pcm_open_substream(pcm, stream, file, &substream); 2263 if (err < 0) 2264 return err; 2265 2266 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL); 2267 if (pcm_file == NULL) { 2268 snd_pcm_release_substream(substream); 2269 return -ENOMEM; 2270 } 2271 pcm_file->substream = substream; 2272 if (substream->ref_count == 1) { 2273 substream->file = pcm_file; 2274 substream->pcm_release = pcm_release_private; 2275 } 2276 file->private_data = pcm_file; 2277 2278 return 0; 2279 } 2280 2281 static int snd_pcm_playback_open(struct inode *inode, struct file *file) 2282 { 2283 struct snd_pcm *pcm; 2284 int err = nonseekable_open(inode, file); 2285 if (err < 0) 2286 return err; 2287 pcm = snd_lookup_minor_data(iminor(inode), 2288 SNDRV_DEVICE_TYPE_PCM_PLAYBACK); 2289 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK); 2290 if (pcm) 2291 snd_card_unref(pcm->card); 2292 return err; 2293 } 2294 2295 static int snd_pcm_capture_open(struct inode *inode, struct file *file) 2296 { 2297 struct snd_pcm *pcm; 2298 int err = nonseekable_open(inode, file); 2299 if (err < 0) 2300 return err; 2301 pcm = snd_lookup_minor_data(iminor(inode), 2302 SNDRV_DEVICE_TYPE_PCM_CAPTURE); 2303 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE); 2304 if (pcm) 2305 snd_card_unref(pcm->card); 2306 return err; 2307 } 2308 2309 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream) 2310 { 2311 int err; 2312 wait_queue_t wait; 2313 2314 if (pcm == NULL) { 2315 err = -ENODEV; 2316 goto __error1; 2317 } 2318 err = snd_card_file_add(pcm->card, file); 2319 if (err < 0) 2320 goto __error1; 2321 if (!try_module_get(pcm->card->module)) { 2322 err = -EFAULT; 2323 goto __error2; 2324 } 2325 init_waitqueue_entry(&wait, current); 2326 add_wait_queue(&pcm->open_wait, &wait); 2327 mutex_lock(&pcm->open_mutex); 2328 while (1) { 2329 err = snd_pcm_open_file(file, pcm, stream); 2330 if (err >= 0) 2331 break; 2332 if (err == -EAGAIN) { 2333 if (file->f_flags & O_NONBLOCK) { 2334 err = -EBUSY; 2335 break; 2336 } 2337 } else 2338 break; 2339 set_current_state(TASK_INTERRUPTIBLE); 2340 mutex_unlock(&pcm->open_mutex); 2341 schedule(); 2342 mutex_lock(&pcm->open_mutex); 2343 if (pcm->card->shutdown) { 2344 err = -ENODEV; 2345 break; 2346 } 2347 if (signal_pending(current)) { 2348 err = -ERESTARTSYS; 2349 break; 2350 } 2351 } 2352 remove_wait_queue(&pcm->open_wait, &wait); 2353 mutex_unlock(&pcm->open_mutex); 2354 if (err < 0) 2355 goto __error; 2356 return err; 2357 2358 __error: 2359 module_put(pcm->card->module); 2360 __error2: 2361 snd_card_file_remove(pcm->card, file); 2362 __error1: 2363 return err; 2364 } 2365 2366 static int snd_pcm_release(struct inode *inode, struct file *file) 2367 { 2368 struct snd_pcm *pcm; 2369 struct snd_pcm_substream *substream; 2370 struct snd_pcm_file *pcm_file; 2371 2372 pcm_file = file->private_data; 2373 substream = pcm_file->substream; 2374 if (snd_BUG_ON(!substream)) 2375 return -ENXIO; 2376 pcm = substream->pcm; 2377 mutex_lock(&pcm->open_mutex); 2378 snd_pcm_release_substream(substream); 2379 kfree(pcm_file); 2380 mutex_unlock(&pcm->open_mutex); 2381 wake_up(&pcm->open_wait); 2382 module_put(pcm->card->module); 2383 snd_card_file_remove(pcm->card, file); 2384 return 0; 2385 } 2386 2387 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream, 2388 snd_pcm_uframes_t frames) 2389 { 2390 struct snd_pcm_runtime *runtime = substream->runtime; 2391 snd_pcm_sframes_t appl_ptr; 2392 snd_pcm_sframes_t ret; 2393 snd_pcm_sframes_t hw_avail; 2394 2395 if (frames == 0) 2396 return 0; 2397 2398 snd_pcm_stream_lock_irq(substream); 2399 switch (runtime->status->state) { 2400 case SNDRV_PCM_STATE_PREPARED: 2401 break; 2402 case SNDRV_PCM_STATE_DRAINING: 2403 case SNDRV_PCM_STATE_RUNNING: 2404 if (snd_pcm_update_hw_ptr(substream) >= 0) 2405 break; 2406 /* Fall through */ 2407 case SNDRV_PCM_STATE_XRUN: 2408 ret = -EPIPE; 2409 goto __end; 2410 case SNDRV_PCM_STATE_SUSPENDED: 2411 ret = -ESTRPIPE; 2412 goto __end; 2413 default: 2414 ret = -EBADFD; 2415 goto __end; 2416 } 2417 2418 hw_avail = snd_pcm_playback_hw_avail(runtime); 2419 if (hw_avail <= 0) { 2420 ret = 0; 2421 goto __end; 2422 } 2423 if (frames > (snd_pcm_uframes_t)hw_avail) 2424 frames = hw_avail; 2425 appl_ptr = runtime->control->appl_ptr - frames; 2426 if (appl_ptr < 0) 2427 appl_ptr += runtime->boundary; 2428 runtime->control->appl_ptr = appl_ptr; 2429 ret = frames; 2430 __end: 2431 snd_pcm_stream_unlock_irq(substream); 2432 return ret; 2433 } 2434 2435 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream, 2436 snd_pcm_uframes_t frames) 2437 { 2438 struct snd_pcm_runtime *runtime = substream->runtime; 2439 snd_pcm_sframes_t appl_ptr; 2440 snd_pcm_sframes_t ret; 2441 snd_pcm_sframes_t hw_avail; 2442 2443 if (frames == 0) 2444 return 0; 2445 2446 snd_pcm_stream_lock_irq(substream); 2447 switch (runtime->status->state) { 2448 case SNDRV_PCM_STATE_PREPARED: 2449 case SNDRV_PCM_STATE_DRAINING: 2450 break; 2451 case SNDRV_PCM_STATE_RUNNING: 2452 if (snd_pcm_update_hw_ptr(substream) >= 0) 2453 break; 2454 /* Fall through */ 2455 case SNDRV_PCM_STATE_XRUN: 2456 ret = -EPIPE; 2457 goto __end; 2458 case SNDRV_PCM_STATE_SUSPENDED: 2459 ret = -ESTRPIPE; 2460 goto __end; 2461 default: 2462 ret = -EBADFD; 2463 goto __end; 2464 } 2465 2466 hw_avail = snd_pcm_capture_hw_avail(runtime); 2467 if (hw_avail <= 0) { 2468 ret = 0; 2469 goto __end; 2470 } 2471 if (frames > (snd_pcm_uframes_t)hw_avail) 2472 frames = hw_avail; 2473 appl_ptr = runtime->control->appl_ptr - frames; 2474 if (appl_ptr < 0) 2475 appl_ptr += runtime->boundary; 2476 runtime->control->appl_ptr = appl_ptr; 2477 ret = frames; 2478 __end: 2479 snd_pcm_stream_unlock_irq(substream); 2480 return ret; 2481 } 2482 2483 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream, 2484 snd_pcm_uframes_t frames) 2485 { 2486 struct snd_pcm_runtime *runtime = substream->runtime; 2487 snd_pcm_sframes_t appl_ptr; 2488 snd_pcm_sframes_t ret; 2489 snd_pcm_sframes_t avail; 2490 2491 if (frames == 0) 2492 return 0; 2493 2494 snd_pcm_stream_lock_irq(substream); 2495 switch (runtime->status->state) { 2496 case SNDRV_PCM_STATE_PREPARED: 2497 case SNDRV_PCM_STATE_PAUSED: 2498 break; 2499 case SNDRV_PCM_STATE_DRAINING: 2500 case SNDRV_PCM_STATE_RUNNING: 2501 if (snd_pcm_update_hw_ptr(substream) >= 0) 2502 break; 2503 /* Fall through */ 2504 case SNDRV_PCM_STATE_XRUN: 2505 ret = -EPIPE; 2506 goto __end; 2507 case SNDRV_PCM_STATE_SUSPENDED: 2508 ret = -ESTRPIPE; 2509 goto __end; 2510 default: 2511 ret = -EBADFD; 2512 goto __end; 2513 } 2514 2515 avail = snd_pcm_playback_avail(runtime); 2516 if (avail <= 0) { 2517 ret = 0; 2518 goto __end; 2519 } 2520 if (frames > (snd_pcm_uframes_t)avail) 2521 frames = avail; 2522 appl_ptr = runtime->control->appl_ptr + frames; 2523 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) 2524 appl_ptr -= runtime->boundary; 2525 runtime->control->appl_ptr = appl_ptr; 2526 ret = frames; 2527 __end: 2528 snd_pcm_stream_unlock_irq(substream); 2529 return ret; 2530 } 2531 2532 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream, 2533 snd_pcm_uframes_t frames) 2534 { 2535 struct snd_pcm_runtime *runtime = substream->runtime; 2536 snd_pcm_sframes_t appl_ptr; 2537 snd_pcm_sframes_t ret; 2538 snd_pcm_sframes_t avail; 2539 2540 if (frames == 0) 2541 return 0; 2542 2543 snd_pcm_stream_lock_irq(substream); 2544 switch (runtime->status->state) { 2545 case SNDRV_PCM_STATE_PREPARED: 2546 case SNDRV_PCM_STATE_DRAINING: 2547 case SNDRV_PCM_STATE_PAUSED: 2548 break; 2549 case SNDRV_PCM_STATE_RUNNING: 2550 if (snd_pcm_update_hw_ptr(substream) >= 0) 2551 break; 2552 /* Fall through */ 2553 case SNDRV_PCM_STATE_XRUN: 2554 ret = -EPIPE; 2555 goto __end; 2556 case SNDRV_PCM_STATE_SUSPENDED: 2557 ret = -ESTRPIPE; 2558 goto __end; 2559 default: 2560 ret = -EBADFD; 2561 goto __end; 2562 } 2563 2564 avail = snd_pcm_capture_avail(runtime); 2565 if (avail <= 0) { 2566 ret = 0; 2567 goto __end; 2568 } 2569 if (frames > (snd_pcm_uframes_t)avail) 2570 frames = avail; 2571 appl_ptr = runtime->control->appl_ptr + frames; 2572 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) 2573 appl_ptr -= runtime->boundary; 2574 runtime->control->appl_ptr = appl_ptr; 2575 ret = frames; 2576 __end: 2577 snd_pcm_stream_unlock_irq(substream); 2578 return ret; 2579 } 2580 2581 static int snd_pcm_hwsync(struct snd_pcm_substream *substream) 2582 { 2583 struct snd_pcm_runtime *runtime = substream->runtime; 2584 int err; 2585 2586 snd_pcm_stream_lock_irq(substream); 2587 switch (runtime->status->state) { 2588 case SNDRV_PCM_STATE_DRAINING: 2589 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 2590 goto __badfd; 2591 /* Fall through */ 2592 case SNDRV_PCM_STATE_RUNNING: 2593 if ((err = snd_pcm_update_hw_ptr(substream)) < 0) 2594 break; 2595 /* Fall through */ 2596 case SNDRV_PCM_STATE_PREPARED: 2597 case SNDRV_PCM_STATE_SUSPENDED: 2598 err = 0; 2599 break; 2600 case SNDRV_PCM_STATE_XRUN: 2601 err = -EPIPE; 2602 break; 2603 default: 2604 __badfd: 2605 err = -EBADFD; 2606 break; 2607 } 2608 snd_pcm_stream_unlock_irq(substream); 2609 return err; 2610 } 2611 2612 static int snd_pcm_delay(struct snd_pcm_substream *substream, 2613 snd_pcm_sframes_t __user *res) 2614 { 2615 struct snd_pcm_runtime *runtime = substream->runtime; 2616 int err; 2617 snd_pcm_sframes_t n = 0; 2618 2619 snd_pcm_stream_lock_irq(substream); 2620 switch (runtime->status->state) { 2621 case SNDRV_PCM_STATE_DRAINING: 2622 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 2623 goto __badfd; 2624 /* Fall through */ 2625 case SNDRV_PCM_STATE_RUNNING: 2626 if ((err = snd_pcm_update_hw_ptr(substream)) < 0) 2627 break; 2628 /* Fall through */ 2629 case SNDRV_PCM_STATE_PREPARED: 2630 case SNDRV_PCM_STATE_SUSPENDED: 2631 err = 0; 2632 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2633 n = snd_pcm_playback_hw_avail(runtime); 2634 else 2635 n = snd_pcm_capture_avail(runtime); 2636 n += runtime->delay; 2637 break; 2638 case SNDRV_PCM_STATE_XRUN: 2639 err = -EPIPE; 2640 break; 2641 default: 2642 __badfd: 2643 err = -EBADFD; 2644 break; 2645 } 2646 snd_pcm_stream_unlock_irq(substream); 2647 if (!err) 2648 if (put_user(n, res)) 2649 err = -EFAULT; 2650 return err; 2651 } 2652 2653 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream, 2654 struct snd_pcm_sync_ptr __user *_sync_ptr) 2655 { 2656 struct snd_pcm_runtime *runtime = substream->runtime; 2657 struct snd_pcm_sync_ptr sync_ptr; 2658 volatile struct snd_pcm_mmap_status *status; 2659 volatile struct snd_pcm_mmap_control *control; 2660 int err; 2661 2662 memset(&sync_ptr, 0, sizeof(sync_ptr)); 2663 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags))) 2664 return -EFAULT; 2665 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control))) 2666 return -EFAULT; 2667 status = runtime->status; 2668 control = runtime->control; 2669 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) { 2670 err = snd_pcm_hwsync(substream); 2671 if (err < 0) 2672 return err; 2673 } 2674 snd_pcm_stream_lock_irq(substream); 2675 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) 2676 control->appl_ptr = sync_ptr.c.control.appl_ptr; 2677 else 2678 sync_ptr.c.control.appl_ptr = control->appl_ptr; 2679 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) 2680 control->avail_min = sync_ptr.c.control.avail_min; 2681 else 2682 sync_ptr.c.control.avail_min = control->avail_min; 2683 sync_ptr.s.status.state = status->state; 2684 sync_ptr.s.status.hw_ptr = status->hw_ptr; 2685 sync_ptr.s.status.tstamp = status->tstamp; 2686 sync_ptr.s.status.suspended_state = status->suspended_state; 2687 snd_pcm_stream_unlock_irq(substream); 2688 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr))) 2689 return -EFAULT; 2690 return 0; 2691 } 2692 2693 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg) 2694 { 2695 struct snd_pcm_runtime *runtime = substream->runtime; 2696 int arg; 2697 2698 if (get_user(arg, _arg)) 2699 return -EFAULT; 2700 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST) 2701 return -EINVAL; 2702 runtime->tstamp_type = arg; 2703 return 0; 2704 } 2705 2706 static int snd_pcm_common_ioctl1(struct file *file, 2707 struct snd_pcm_substream *substream, 2708 unsigned int cmd, void __user *arg) 2709 { 2710 switch (cmd) { 2711 case SNDRV_PCM_IOCTL_PVERSION: 2712 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0; 2713 case SNDRV_PCM_IOCTL_INFO: 2714 return snd_pcm_info_user(substream, arg); 2715 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */ 2716 return 0; 2717 case SNDRV_PCM_IOCTL_TTSTAMP: 2718 return snd_pcm_tstamp(substream, arg); 2719 case SNDRV_PCM_IOCTL_HW_REFINE: 2720 return snd_pcm_hw_refine_user(substream, arg); 2721 case SNDRV_PCM_IOCTL_HW_PARAMS: 2722 return snd_pcm_hw_params_user(substream, arg); 2723 case SNDRV_PCM_IOCTL_HW_FREE: 2724 return snd_pcm_hw_free(substream); 2725 case SNDRV_PCM_IOCTL_SW_PARAMS: 2726 return snd_pcm_sw_params_user(substream, arg); 2727 case SNDRV_PCM_IOCTL_STATUS: 2728 return snd_pcm_status_user(substream, arg); 2729 case SNDRV_PCM_IOCTL_CHANNEL_INFO: 2730 return snd_pcm_channel_info_user(substream, arg); 2731 case SNDRV_PCM_IOCTL_PREPARE: 2732 return snd_pcm_prepare(substream, file); 2733 case SNDRV_PCM_IOCTL_RESET: 2734 return snd_pcm_reset(substream); 2735 case SNDRV_PCM_IOCTL_START: 2736 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING); 2737 case SNDRV_PCM_IOCTL_LINK: 2738 return snd_pcm_link(substream, (int)(unsigned long) arg); 2739 case SNDRV_PCM_IOCTL_UNLINK: 2740 return snd_pcm_unlink(substream); 2741 case SNDRV_PCM_IOCTL_RESUME: 2742 return snd_pcm_resume(substream); 2743 case SNDRV_PCM_IOCTL_XRUN: 2744 return snd_pcm_xrun(substream); 2745 case SNDRV_PCM_IOCTL_HWSYNC: 2746 return snd_pcm_hwsync(substream); 2747 case SNDRV_PCM_IOCTL_DELAY: 2748 return snd_pcm_delay(substream, arg); 2749 case SNDRV_PCM_IOCTL_SYNC_PTR: 2750 return snd_pcm_sync_ptr(substream, arg); 2751 #ifdef CONFIG_SND_SUPPORT_OLD_API 2752 case SNDRV_PCM_IOCTL_HW_REFINE_OLD: 2753 return snd_pcm_hw_refine_old_user(substream, arg); 2754 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD: 2755 return snd_pcm_hw_params_old_user(substream, arg); 2756 #endif 2757 case SNDRV_PCM_IOCTL_DRAIN: 2758 return snd_pcm_drain(substream, file); 2759 case SNDRV_PCM_IOCTL_DROP: 2760 return snd_pcm_drop(substream); 2761 case SNDRV_PCM_IOCTL_PAUSE: 2762 { 2763 int res; 2764 snd_pcm_stream_lock_irq(substream); 2765 res = snd_pcm_pause(substream, (int)(unsigned long)arg); 2766 snd_pcm_stream_unlock_irq(substream); 2767 return res; 2768 } 2769 } 2770 pcm_dbg(substream->pcm, "unknown ioctl = 0x%x\n", cmd); 2771 return -ENOTTY; 2772 } 2773 2774 static int snd_pcm_playback_ioctl1(struct file *file, 2775 struct snd_pcm_substream *substream, 2776 unsigned int cmd, void __user *arg) 2777 { 2778 if (snd_BUG_ON(!substream)) 2779 return -ENXIO; 2780 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) 2781 return -EINVAL; 2782 switch (cmd) { 2783 case SNDRV_PCM_IOCTL_WRITEI_FRAMES: 2784 { 2785 struct snd_xferi xferi; 2786 struct snd_xferi __user *_xferi = arg; 2787 struct snd_pcm_runtime *runtime = substream->runtime; 2788 snd_pcm_sframes_t result; 2789 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2790 return -EBADFD; 2791 if (put_user(0, &_xferi->result)) 2792 return -EFAULT; 2793 if (copy_from_user(&xferi, _xferi, sizeof(xferi))) 2794 return -EFAULT; 2795 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames); 2796 __put_user(result, &_xferi->result); 2797 return result < 0 ? result : 0; 2798 } 2799 case SNDRV_PCM_IOCTL_WRITEN_FRAMES: 2800 { 2801 struct snd_xfern xfern; 2802 struct snd_xfern __user *_xfern = arg; 2803 struct snd_pcm_runtime *runtime = substream->runtime; 2804 void __user **bufs; 2805 snd_pcm_sframes_t result; 2806 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2807 return -EBADFD; 2808 if (runtime->channels > 128) 2809 return -EINVAL; 2810 if (put_user(0, &_xfern->result)) 2811 return -EFAULT; 2812 if (copy_from_user(&xfern, _xfern, sizeof(xfern))) 2813 return -EFAULT; 2814 2815 bufs = memdup_user(xfern.bufs, 2816 sizeof(void *) * runtime->channels); 2817 if (IS_ERR(bufs)) 2818 return PTR_ERR(bufs); 2819 result = snd_pcm_lib_writev(substream, bufs, xfern.frames); 2820 kfree(bufs); 2821 __put_user(result, &_xfern->result); 2822 return result < 0 ? result : 0; 2823 } 2824 case SNDRV_PCM_IOCTL_REWIND: 2825 { 2826 snd_pcm_uframes_t frames; 2827 snd_pcm_uframes_t __user *_frames = arg; 2828 snd_pcm_sframes_t result; 2829 if (get_user(frames, _frames)) 2830 return -EFAULT; 2831 if (put_user(0, _frames)) 2832 return -EFAULT; 2833 result = snd_pcm_playback_rewind(substream, frames); 2834 __put_user(result, _frames); 2835 return result < 0 ? result : 0; 2836 } 2837 case SNDRV_PCM_IOCTL_FORWARD: 2838 { 2839 snd_pcm_uframes_t frames; 2840 snd_pcm_uframes_t __user *_frames = arg; 2841 snd_pcm_sframes_t result; 2842 if (get_user(frames, _frames)) 2843 return -EFAULT; 2844 if (put_user(0, _frames)) 2845 return -EFAULT; 2846 result = snd_pcm_playback_forward(substream, frames); 2847 __put_user(result, _frames); 2848 return result < 0 ? result : 0; 2849 } 2850 } 2851 return snd_pcm_common_ioctl1(file, substream, cmd, arg); 2852 } 2853 2854 static int snd_pcm_capture_ioctl1(struct file *file, 2855 struct snd_pcm_substream *substream, 2856 unsigned int cmd, void __user *arg) 2857 { 2858 if (snd_BUG_ON(!substream)) 2859 return -ENXIO; 2860 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE)) 2861 return -EINVAL; 2862 switch (cmd) { 2863 case SNDRV_PCM_IOCTL_READI_FRAMES: 2864 { 2865 struct snd_xferi xferi; 2866 struct snd_xferi __user *_xferi = arg; 2867 struct snd_pcm_runtime *runtime = substream->runtime; 2868 snd_pcm_sframes_t result; 2869 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2870 return -EBADFD; 2871 if (put_user(0, &_xferi->result)) 2872 return -EFAULT; 2873 if (copy_from_user(&xferi, _xferi, sizeof(xferi))) 2874 return -EFAULT; 2875 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames); 2876 __put_user(result, &_xferi->result); 2877 return result < 0 ? result : 0; 2878 } 2879 case SNDRV_PCM_IOCTL_READN_FRAMES: 2880 { 2881 struct snd_xfern xfern; 2882 struct snd_xfern __user *_xfern = arg; 2883 struct snd_pcm_runtime *runtime = substream->runtime; 2884 void *bufs; 2885 snd_pcm_sframes_t result; 2886 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2887 return -EBADFD; 2888 if (runtime->channels > 128) 2889 return -EINVAL; 2890 if (put_user(0, &_xfern->result)) 2891 return -EFAULT; 2892 if (copy_from_user(&xfern, _xfern, sizeof(xfern))) 2893 return -EFAULT; 2894 2895 bufs = memdup_user(xfern.bufs, 2896 sizeof(void *) * runtime->channels); 2897 if (IS_ERR(bufs)) 2898 return PTR_ERR(bufs); 2899 result = snd_pcm_lib_readv(substream, bufs, xfern.frames); 2900 kfree(bufs); 2901 __put_user(result, &_xfern->result); 2902 return result < 0 ? result : 0; 2903 } 2904 case SNDRV_PCM_IOCTL_REWIND: 2905 { 2906 snd_pcm_uframes_t frames; 2907 snd_pcm_uframes_t __user *_frames = arg; 2908 snd_pcm_sframes_t result; 2909 if (get_user(frames, _frames)) 2910 return -EFAULT; 2911 if (put_user(0, _frames)) 2912 return -EFAULT; 2913 result = snd_pcm_capture_rewind(substream, frames); 2914 __put_user(result, _frames); 2915 return result < 0 ? result : 0; 2916 } 2917 case SNDRV_PCM_IOCTL_FORWARD: 2918 { 2919 snd_pcm_uframes_t frames; 2920 snd_pcm_uframes_t __user *_frames = arg; 2921 snd_pcm_sframes_t result; 2922 if (get_user(frames, _frames)) 2923 return -EFAULT; 2924 if (put_user(0, _frames)) 2925 return -EFAULT; 2926 result = snd_pcm_capture_forward(substream, frames); 2927 __put_user(result, _frames); 2928 return result < 0 ? result : 0; 2929 } 2930 } 2931 return snd_pcm_common_ioctl1(file, substream, cmd, arg); 2932 } 2933 2934 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd, 2935 unsigned long arg) 2936 { 2937 struct snd_pcm_file *pcm_file; 2938 2939 pcm_file = file->private_data; 2940 2941 if (((cmd >> 8) & 0xff) != 'A') 2942 return -ENOTTY; 2943 2944 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd, 2945 (void __user *)arg); 2946 } 2947 2948 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd, 2949 unsigned long arg) 2950 { 2951 struct snd_pcm_file *pcm_file; 2952 2953 pcm_file = file->private_data; 2954 2955 if (((cmd >> 8) & 0xff) != 'A') 2956 return -ENOTTY; 2957 2958 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd, 2959 (void __user *)arg); 2960 } 2961 2962 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, 2963 unsigned int cmd, void *arg) 2964 { 2965 mm_segment_t fs; 2966 int result; 2967 2968 fs = snd_enter_user(); 2969 switch (substream->stream) { 2970 case SNDRV_PCM_STREAM_PLAYBACK: 2971 result = snd_pcm_playback_ioctl1(NULL, substream, cmd, 2972 (void __user *)arg); 2973 break; 2974 case SNDRV_PCM_STREAM_CAPTURE: 2975 result = snd_pcm_capture_ioctl1(NULL, substream, cmd, 2976 (void __user *)arg); 2977 break; 2978 default: 2979 result = -EINVAL; 2980 break; 2981 } 2982 snd_leave_user(fs); 2983 return result; 2984 } 2985 2986 EXPORT_SYMBOL(snd_pcm_kernel_ioctl); 2987 2988 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count, 2989 loff_t * offset) 2990 { 2991 struct snd_pcm_file *pcm_file; 2992 struct snd_pcm_substream *substream; 2993 struct snd_pcm_runtime *runtime; 2994 snd_pcm_sframes_t result; 2995 2996 pcm_file = file->private_data; 2997 substream = pcm_file->substream; 2998 if (PCM_RUNTIME_CHECK(substream)) 2999 return -ENXIO; 3000 runtime = substream->runtime; 3001 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 3002 return -EBADFD; 3003 if (!frame_aligned(runtime, count)) 3004 return -EINVAL; 3005 count = bytes_to_frames(runtime, count); 3006 result = snd_pcm_lib_read(substream, buf, count); 3007 if (result > 0) 3008 result = frames_to_bytes(runtime, result); 3009 return result; 3010 } 3011 3012 static ssize_t snd_pcm_write(struct file *file, const char __user *buf, 3013 size_t count, loff_t * offset) 3014 { 3015 struct snd_pcm_file *pcm_file; 3016 struct snd_pcm_substream *substream; 3017 struct snd_pcm_runtime *runtime; 3018 snd_pcm_sframes_t result; 3019 3020 pcm_file = file->private_data; 3021 substream = pcm_file->substream; 3022 if (PCM_RUNTIME_CHECK(substream)) 3023 return -ENXIO; 3024 runtime = substream->runtime; 3025 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 3026 return -EBADFD; 3027 if (!frame_aligned(runtime, count)) 3028 return -EINVAL; 3029 count = bytes_to_frames(runtime, count); 3030 result = snd_pcm_lib_write(substream, buf, count); 3031 if (result > 0) 3032 result = frames_to_bytes(runtime, result); 3033 return result; 3034 } 3035 3036 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov, 3037 unsigned long nr_segs, loff_t pos) 3038 3039 { 3040 struct snd_pcm_file *pcm_file; 3041 struct snd_pcm_substream *substream; 3042 struct snd_pcm_runtime *runtime; 3043 snd_pcm_sframes_t result; 3044 unsigned long i; 3045 void __user **bufs; 3046 snd_pcm_uframes_t frames; 3047 3048 pcm_file = iocb->ki_filp->private_data; 3049 substream = pcm_file->substream; 3050 if (PCM_RUNTIME_CHECK(substream)) 3051 return -ENXIO; 3052 runtime = substream->runtime; 3053 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 3054 return -EBADFD; 3055 if (nr_segs > 1024 || nr_segs != runtime->channels) 3056 return -EINVAL; 3057 if (!frame_aligned(runtime, iov->iov_len)) 3058 return -EINVAL; 3059 frames = bytes_to_samples(runtime, iov->iov_len); 3060 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL); 3061 if (bufs == NULL) 3062 return -ENOMEM; 3063 for (i = 0; i < nr_segs; ++i) 3064 bufs[i] = iov[i].iov_base; 3065 result = snd_pcm_lib_readv(substream, bufs, frames); 3066 if (result > 0) 3067 result = frames_to_bytes(runtime, result); 3068 kfree(bufs); 3069 return result; 3070 } 3071 3072 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov, 3073 unsigned long nr_segs, loff_t pos) 3074 { 3075 struct snd_pcm_file *pcm_file; 3076 struct snd_pcm_substream *substream; 3077 struct snd_pcm_runtime *runtime; 3078 snd_pcm_sframes_t result; 3079 unsigned long i; 3080 void __user **bufs; 3081 snd_pcm_uframes_t frames; 3082 3083 pcm_file = iocb->ki_filp->private_data; 3084 substream = pcm_file->substream; 3085 if (PCM_RUNTIME_CHECK(substream)) 3086 return -ENXIO; 3087 runtime = substream->runtime; 3088 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 3089 return -EBADFD; 3090 if (nr_segs > 128 || nr_segs != runtime->channels || 3091 !frame_aligned(runtime, iov->iov_len)) 3092 return -EINVAL; 3093 frames = bytes_to_samples(runtime, iov->iov_len); 3094 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL); 3095 if (bufs == NULL) 3096 return -ENOMEM; 3097 for (i = 0; i < nr_segs; ++i) 3098 bufs[i] = iov[i].iov_base; 3099 result = snd_pcm_lib_writev(substream, bufs, frames); 3100 if (result > 0) 3101 result = frames_to_bytes(runtime, result); 3102 kfree(bufs); 3103 return result; 3104 } 3105 3106 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait) 3107 { 3108 struct snd_pcm_file *pcm_file; 3109 struct snd_pcm_substream *substream; 3110 struct snd_pcm_runtime *runtime; 3111 unsigned int mask; 3112 snd_pcm_uframes_t avail; 3113 3114 pcm_file = file->private_data; 3115 3116 substream = pcm_file->substream; 3117 if (PCM_RUNTIME_CHECK(substream)) 3118 return -ENXIO; 3119 runtime = substream->runtime; 3120 3121 poll_wait(file, &runtime->sleep, wait); 3122 3123 snd_pcm_stream_lock_irq(substream); 3124 avail = snd_pcm_playback_avail(runtime); 3125 switch (runtime->status->state) { 3126 case SNDRV_PCM_STATE_RUNNING: 3127 case SNDRV_PCM_STATE_PREPARED: 3128 case SNDRV_PCM_STATE_PAUSED: 3129 if (avail >= runtime->control->avail_min) { 3130 mask = POLLOUT | POLLWRNORM; 3131 break; 3132 } 3133 /* Fall through */ 3134 case SNDRV_PCM_STATE_DRAINING: 3135 mask = 0; 3136 break; 3137 default: 3138 mask = POLLOUT | POLLWRNORM | POLLERR; 3139 break; 3140 } 3141 snd_pcm_stream_unlock_irq(substream); 3142 return mask; 3143 } 3144 3145 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait) 3146 { 3147 struct snd_pcm_file *pcm_file; 3148 struct snd_pcm_substream *substream; 3149 struct snd_pcm_runtime *runtime; 3150 unsigned int mask; 3151 snd_pcm_uframes_t avail; 3152 3153 pcm_file = file->private_data; 3154 3155 substream = pcm_file->substream; 3156 if (PCM_RUNTIME_CHECK(substream)) 3157 return -ENXIO; 3158 runtime = substream->runtime; 3159 3160 poll_wait(file, &runtime->sleep, wait); 3161 3162 snd_pcm_stream_lock_irq(substream); 3163 avail = snd_pcm_capture_avail(runtime); 3164 switch (runtime->status->state) { 3165 case SNDRV_PCM_STATE_RUNNING: 3166 case SNDRV_PCM_STATE_PREPARED: 3167 case SNDRV_PCM_STATE_PAUSED: 3168 if (avail >= runtime->control->avail_min) { 3169 mask = POLLIN | POLLRDNORM; 3170 break; 3171 } 3172 mask = 0; 3173 break; 3174 case SNDRV_PCM_STATE_DRAINING: 3175 if (avail > 0) { 3176 mask = POLLIN | POLLRDNORM; 3177 break; 3178 } 3179 /* Fall through */ 3180 default: 3181 mask = POLLIN | POLLRDNORM | POLLERR; 3182 break; 3183 } 3184 snd_pcm_stream_unlock_irq(substream); 3185 return mask; 3186 } 3187 3188 /* 3189 * mmap support 3190 */ 3191 3192 /* 3193 * Only on coherent architectures, we can mmap the status and the control records 3194 * for effcient data transfer. On others, we have to use HWSYNC ioctl... 3195 */ 3196 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) 3197 /* 3198 * mmap status record 3199 */ 3200 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area, 3201 struct vm_fault *vmf) 3202 { 3203 struct snd_pcm_substream *substream = area->vm_private_data; 3204 struct snd_pcm_runtime *runtime; 3205 3206 if (substream == NULL) 3207 return VM_FAULT_SIGBUS; 3208 runtime = substream->runtime; 3209 vmf->page = virt_to_page(runtime->status); 3210 get_page(vmf->page); 3211 return 0; 3212 } 3213 3214 static const struct vm_operations_struct snd_pcm_vm_ops_status = 3215 { 3216 .fault = snd_pcm_mmap_status_fault, 3217 }; 3218 3219 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, 3220 struct vm_area_struct *area) 3221 { 3222 long size; 3223 if (!(area->vm_flags & VM_READ)) 3224 return -EINVAL; 3225 size = area->vm_end - area->vm_start; 3226 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))) 3227 return -EINVAL; 3228 area->vm_ops = &snd_pcm_vm_ops_status; 3229 area->vm_private_data = substream; 3230 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; 3231 return 0; 3232 } 3233 3234 /* 3235 * mmap control record 3236 */ 3237 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area, 3238 struct vm_fault *vmf) 3239 { 3240 struct snd_pcm_substream *substream = area->vm_private_data; 3241 struct snd_pcm_runtime *runtime; 3242 3243 if (substream == NULL) 3244 return VM_FAULT_SIGBUS; 3245 runtime = substream->runtime; 3246 vmf->page = virt_to_page(runtime->control); 3247 get_page(vmf->page); 3248 return 0; 3249 } 3250 3251 static const struct vm_operations_struct snd_pcm_vm_ops_control = 3252 { 3253 .fault = snd_pcm_mmap_control_fault, 3254 }; 3255 3256 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, 3257 struct vm_area_struct *area) 3258 { 3259 long size; 3260 if (!(area->vm_flags & VM_READ)) 3261 return -EINVAL; 3262 size = area->vm_end - area->vm_start; 3263 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))) 3264 return -EINVAL; 3265 area->vm_ops = &snd_pcm_vm_ops_control; 3266 area->vm_private_data = substream; 3267 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; 3268 return 0; 3269 } 3270 #else /* ! coherent mmap */ 3271 /* 3272 * don't support mmap for status and control records. 3273 */ 3274 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, 3275 struct vm_area_struct *area) 3276 { 3277 return -ENXIO; 3278 } 3279 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, 3280 struct vm_area_struct *area) 3281 { 3282 return -ENXIO; 3283 } 3284 #endif /* coherent mmap */ 3285 3286 static inline struct page * 3287 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs) 3288 { 3289 void *vaddr = substream->runtime->dma_area + ofs; 3290 return virt_to_page(vaddr); 3291 } 3292 3293 /* 3294 * fault callback for mmapping a RAM page 3295 */ 3296 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area, 3297 struct vm_fault *vmf) 3298 { 3299 struct snd_pcm_substream *substream = area->vm_private_data; 3300 struct snd_pcm_runtime *runtime; 3301 unsigned long offset; 3302 struct page * page; 3303 size_t dma_bytes; 3304 3305 if (substream == NULL) 3306 return VM_FAULT_SIGBUS; 3307 runtime = substream->runtime; 3308 offset = vmf->pgoff << PAGE_SHIFT; 3309 dma_bytes = PAGE_ALIGN(runtime->dma_bytes); 3310 if (offset > dma_bytes - PAGE_SIZE) 3311 return VM_FAULT_SIGBUS; 3312 if (substream->ops->page) 3313 page = substream->ops->page(substream, offset); 3314 else 3315 page = snd_pcm_default_page_ops(substream, offset); 3316 if (!page) 3317 return VM_FAULT_SIGBUS; 3318 get_page(page); 3319 vmf->page = page; 3320 return 0; 3321 } 3322 3323 static const struct vm_operations_struct snd_pcm_vm_ops_data = { 3324 .open = snd_pcm_mmap_data_open, 3325 .close = snd_pcm_mmap_data_close, 3326 }; 3327 3328 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = { 3329 .open = snd_pcm_mmap_data_open, 3330 .close = snd_pcm_mmap_data_close, 3331 .fault = snd_pcm_mmap_data_fault, 3332 }; 3333 3334 /* 3335 * mmap the DMA buffer on RAM 3336 */ 3337 3338 /** 3339 * snd_pcm_lib_default_mmap - Default PCM data mmap function 3340 * @substream: PCM substream 3341 * @area: VMA 3342 * 3343 * This is the default mmap handler for PCM data. When mmap pcm_ops is NULL, 3344 * this function is invoked implicitly. 3345 */ 3346 int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream, 3347 struct vm_area_struct *area) 3348 { 3349 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; 3350 #ifdef CONFIG_GENERIC_ALLOCATOR 3351 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_IRAM) { 3352 area->vm_page_prot = pgprot_writecombine(area->vm_page_prot); 3353 return remap_pfn_range(area, area->vm_start, 3354 substream->dma_buffer.addr >> PAGE_SHIFT, 3355 area->vm_end - area->vm_start, area->vm_page_prot); 3356 } 3357 #endif /* CONFIG_GENERIC_ALLOCATOR */ 3358 #ifndef CONFIG_X86 /* for avoiding warnings arch/x86/mm/pat.c */ 3359 if (!substream->ops->page && 3360 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) 3361 return dma_mmap_coherent(substream->dma_buffer.dev.dev, 3362 area, 3363 substream->runtime->dma_area, 3364 substream->runtime->dma_addr, 3365 area->vm_end - area->vm_start); 3366 #endif /* CONFIG_X86 */ 3367 /* mmap with fault handler */ 3368 area->vm_ops = &snd_pcm_vm_ops_data_fault; 3369 return 0; 3370 } 3371 EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap); 3372 3373 /* 3374 * mmap the DMA buffer on I/O memory area 3375 */ 3376 #if SNDRV_PCM_INFO_MMAP_IOMEM 3377 /** 3378 * snd_pcm_lib_mmap_iomem - Default PCM data mmap function for I/O mem 3379 * @substream: PCM substream 3380 * @area: VMA 3381 * 3382 * When your hardware uses the iomapped pages as the hardware buffer and 3383 * wants to mmap it, pass this function as mmap pcm_ops. Note that this 3384 * is supposed to work only on limited architectures. 3385 */ 3386 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, 3387 struct vm_area_struct *area) 3388 { 3389 struct snd_pcm_runtime *runtime = substream->runtime;; 3390 3391 area->vm_page_prot = pgprot_noncached(area->vm_page_prot); 3392 return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes); 3393 } 3394 3395 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem); 3396 #endif /* SNDRV_PCM_INFO_MMAP */ 3397 3398 /* 3399 * mmap DMA buffer 3400 */ 3401 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, 3402 struct vm_area_struct *area) 3403 { 3404 struct snd_pcm_runtime *runtime; 3405 long size; 3406 unsigned long offset; 3407 size_t dma_bytes; 3408 int err; 3409 3410 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 3411 if (!(area->vm_flags & (VM_WRITE|VM_READ))) 3412 return -EINVAL; 3413 } else { 3414 if (!(area->vm_flags & VM_READ)) 3415 return -EINVAL; 3416 } 3417 runtime = substream->runtime; 3418 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 3419 return -EBADFD; 3420 if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) 3421 return -ENXIO; 3422 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || 3423 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) 3424 return -EINVAL; 3425 size = area->vm_end - area->vm_start; 3426 offset = area->vm_pgoff << PAGE_SHIFT; 3427 dma_bytes = PAGE_ALIGN(runtime->dma_bytes); 3428 if ((size_t)size > dma_bytes) 3429 return -EINVAL; 3430 if (offset > dma_bytes - size) 3431 return -EINVAL; 3432 3433 area->vm_ops = &snd_pcm_vm_ops_data; 3434 area->vm_private_data = substream; 3435 if (substream->ops->mmap) 3436 err = substream->ops->mmap(substream, area); 3437 else 3438 err = snd_pcm_lib_default_mmap(substream, area); 3439 if (!err) 3440 atomic_inc(&substream->mmap_count); 3441 return err; 3442 } 3443 3444 EXPORT_SYMBOL(snd_pcm_mmap_data); 3445 3446 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area) 3447 { 3448 struct snd_pcm_file * pcm_file; 3449 struct snd_pcm_substream *substream; 3450 unsigned long offset; 3451 3452 pcm_file = file->private_data; 3453 substream = pcm_file->substream; 3454 if (PCM_RUNTIME_CHECK(substream)) 3455 return -ENXIO; 3456 3457 offset = area->vm_pgoff << PAGE_SHIFT; 3458 switch (offset) { 3459 case SNDRV_PCM_MMAP_OFFSET_STATUS: 3460 if (pcm_file->no_compat_mmap) 3461 return -ENXIO; 3462 return snd_pcm_mmap_status(substream, file, area); 3463 case SNDRV_PCM_MMAP_OFFSET_CONTROL: 3464 if (pcm_file->no_compat_mmap) 3465 return -ENXIO; 3466 return snd_pcm_mmap_control(substream, file, area); 3467 default: 3468 return snd_pcm_mmap_data(substream, file, area); 3469 } 3470 return 0; 3471 } 3472 3473 static int snd_pcm_fasync(int fd, struct file * file, int on) 3474 { 3475 struct snd_pcm_file * pcm_file; 3476 struct snd_pcm_substream *substream; 3477 struct snd_pcm_runtime *runtime; 3478 3479 pcm_file = file->private_data; 3480 substream = pcm_file->substream; 3481 if (PCM_RUNTIME_CHECK(substream)) 3482 return -ENXIO; 3483 runtime = substream->runtime; 3484 return fasync_helper(fd, file, on, &runtime->fasync); 3485 } 3486 3487 /* 3488 * ioctl32 compat 3489 */ 3490 #ifdef CONFIG_COMPAT 3491 #include "pcm_compat.c" 3492 #else 3493 #define snd_pcm_ioctl_compat NULL 3494 #endif 3495 3496 /* 3497 * To be removed helpers to keep binary compatibility 3498 */ 3499 3500 #ifdef CONFIG_SND_SUPPORT_OLD_API 3501 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5)) 3502 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5)) 3503 3504 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params, 3505 struct snd_pcm_hw_params_old *oparams) 3506 { 3507 unsigned int i; 3508 3509 memset(params, 0, sizeof(*params)); 3510 params->flags = oparams->flags; 3511 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) 3512 params->masks[i].bits[0] = oparams->masks[i]; 3513 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals)); 3514 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask); 3515 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask); 3516 params->info = oparams->info; 3517 params->msbits = oparams->msbits; 3518 params->rate_num = oparams->rate_num; 3519 params->rate_den = oparams->rate_den; 3520 params->fifo_size = oparams->fifo_size; 3521 } 3522 3523 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams, 3524 struct snd_pcm_hw_params *params) 3525 { 3526 unsigned int i; 3527 3528 memset(oparams, 0, sizeof(*oparams)); 3529 oparams->flags = params->flags; 3530 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) 3531 oparams->masks[i] = params->masks[i].bits[0]; 3532 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals)); 3533 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask); 3534 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask); 3535 oparams->info = params->info; 3536 oparams->msbits = params->msbits; 3537 oparams->rate_num = params->rate_num; 3538 oparams->rate_den = params->rate_den; 3539 oparams->fifo_size = params->fifo_size; 3540 } 3541 3542 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, 3543 struct snd_pcm_hw_params_old __user * _oparams) 3544 { 3545 struct snd_pcm_hw_params *params; 3546 struct snd_pcm_hw_params_old *oparams = NULL; 3547 int err; 3548 3549 params = kmalloc(sizeof(*params), GFP_KERNEL); 3550 if (!params) 3551 return -ENOMEM; 3552 3553 oparams = memdup_user(_oparams, sizeof(*oparams)); 3554 if (IS_ERR(oparams)) { 3555 err = PTR_ERR(oparams); 3556 goto out; 3557 } 3558 snd_pcm_hw_convert_from_old_params(params, oparams); 3559 err = snd_pcm_hw_refine(substream, params); 3560 snd_pcm_hw_convert_to_old_params(oparams, params); 3561 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { 3562 if (!err) 3563 err = -EFAULT; 3564 } 3565 3566 kfree(oparams); 3567 out: 3568 kfree(params); 3569 return err; 3570 } 3571 3572 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, 3573 struct snd_pcm_hw_params_old __user * _oparams) 3574 { 3575 struct snd_pcm_hw_params *params; 3576 struct snd_pcm_hw_params_old *oparams = NULL; 3577 int err; 3578 3579 params = kmalloc(sizeof(*params), GFP_KERNEL); 3580 if (!params) 3581 return -ENOMEM; 3582 3583 oparams = memdup_user(_oparams, sizeof(*oparams)); 3584 if (IS_ERR(oparams)) { 3585 err = PTR_ERR(oparams); 3586 goto out; 3587 } 3588 snd_pcm_hw_convert_from_old_params(params, oparams); 3589 err = snd_pcm_hw_params(substream, params); 3590 snd_pcm_hw_convert_to_old_params(oparams, params); 3591 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { 3592 if (!err) 3593 err = -EFAULT; 3594 } 3595 3596 kfree(oparams); 3597 out: 3598 kfree(params); 3599 return err; 3600 } 3601 #endif /* CONFIG_SND_SUPPORT_OLD_API */ 3602 3603 #ifndef CONFIG_MMU 3604 static unsigned long snd_pcm_get_unmapped_area(struct file *file, 3605 unsigned long addr, 3606 unsigned long len, 3607 unsigned long pgoff, 3608 unsigned long flags) 3609 { 3610 struct snd_pcm_file *pcm_file = file->private_data; 3611 struct snd_pcm_substream *substream = pcm_file->substream; 3612 struct snd_pcm_runtime *runtime = substream->runtime; 3613 unsigned long offset = pgoff << PAGE_SHIFT; 3614 3615 switch (offset) { 3616 case SNDRV_PCM_MMAP_OFFSET_STATUS: 3617 return (unsigned long)runtime->status; 3618 case SNDRV_PCM_MMAP_OFFSET_CONTROL: 3619 return (unsigned long)runtime->control; 3620 default: 3621 return (unsigned long)runtime->dma_area + offset; 3622 } 3623 } 3624 #else 3625 # define snd_pcm_get_unmapped_area NULL 3626 #endif 3627 3628 /* 3629 * Register section 3630 */ 3631 3632 const struct file_operations snd_pcm_f_ops[2] = { 3633 { 3634 .owner = THIS_MODULE, 3635 .write = snd_pcm_write, 3636 .aio_write = snd_pcm_aio_write, 3637 .open = snd_pcm_playback_open, 3638 .release = snd_pcm_release, 3639 .llseek = no_llseek, 3640 .poll = snd_pcm_playback_poll, 3641 .unlocked_ioctl = snd_pcm_playback_ioctl, 3642 .compat_ioctl = snd_pcm_ioctl_compat, 3643 .mmap = snd_pcm_mmap, 3644 .fasync = snd_pcm_fasync, 3645 .get_unmapped_area = snd_pcm_get_unmapped_area, 3646 }, 3647 { 3648 .owner = THIS_MODULE, 3649 .read = snd_pcm_read, 3650 .aio_read = snd_pcm_aio_read, 3651 .open = snd_pcm_capture_open, 3652 .release = snd_pcm_release, 3653 .llseek = no_llseek, 3654 .poll = snd_pcm_capture_poll, 3655 .unlocked_ioctl = snd_pcm_capture_ioctl, 3656 .compat_ioctl = snd_pcm_ioctl_compat, 3657 .mmap = snd_pcm_mmap, 3658 .fasync = snd_pcm_fasync, 3659 .get_unmapped_area = snd_pcm_get_unmapped_area, 3660 } 3661 }; 3662