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