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/io.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 <linux/uio.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 /* Writer in rwsem may block readers even during its waiting in queue, 78 * and this may lead to a deadlock when the code path takes read sem 79 * twice (e.g. one in snd_pcm_action_nonatomic() and another in 80 * snd_pcm_stream_lock()). As a (suboptimal) workaround, let writer to 81 * spin until it gets the lock. 82 */ 83 static inline void down_write_nonblock(struct rw_semaphore *lock) 84 { 85 while (!down_write_trylock(lock)) 86 cond_resched(); 87 } 88 89 /** 90 * snd_pcm_stream_lock - Lock the PCM stream 91 * @substream: PCM substream 92 * 93 * This locks the PCM stream's spinlock or mutex depending on the nonatomic 94 * flag of the given substream. This also takes the global link rw lock 95 * (or rw sem), too, for avoiding the race with linked streams. 96 */ 97 void snd_pcm_stream_lock(struct snd_pcm_substream *substream) 98 { 99 if (substream->pcm->nonatomic) { 100 down_read_nested(&snd_pcm_link_rwsem, SINGLE_DEPTH_NESTING); 101 mutex_lock(&substream->self_group.mutex); 102 } else { 103 read_lock(&snd_pcm_link_rwlock); 104 spin_lock(&substream->self_group.lock); 105 } 106 } 107 EXPORT_SYMBOL_GPL(snd_pcm_stream_lock); 108 109 /** 110 * snd_pcm_stream_lock - Unlock the PCM stream 111 * @substream: PCM substream 112 * 113 * This unlocks the PCM stream that has been locked via snd_pcm_stream_lock(). 114 */ 115 void snd_pcm_stream_unlock(struct snd_pcm_substream *substream) 116 { 117 if (substream->pcm->nonatomic) { 118 mutex_unlock(&substream->self_group.mutex); 119 up_read(&snd_pcm_link_rwsem); 120 } else { 121 spin_unlock(&substream->self_group.lock); 122 read_unlock(&snd_pcm_link_rwlock); 123 } 124 } 125 EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock); 126 127 /** 128 * snd_pcm_stream_lock_irq - Lock the PCM stream 129 * @substream: PCM substream 130 * 131 * This locks the PCM stream like snd_pcm_stream_lock() and disables the local 132 * IRQ (only when nonatomic is false). In nonatomic case, this is identical 133 * as snd_pcm_stream_lock(). 134 */ 135 void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream) 136 { 137 if (!substream->pcm->nonatomic) 138 local_irq_disable(); 139 snd_pcm_stream_lock(substream); 140 } 141 EXPORT_SYMBOL_GPL(snd_pcm_stream_lock_irq); 142 143 /** 144 * snd_pcm_stream_unlock_irq - Unlock the PCM stream 145 * @substream: PCM substream 146 * 147 * This is a counter-part of snd_pcm_stream_lock_irq(). 148 */ 149 void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream) 150 { 151 snd_pcm_stream_unlock(substream); 152 if (!substream->pcm->nonatomic) 153 local_irq_enable(); 154 } 155 EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irq); 156 157 unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream) 158 { 159 unsigned long flags = 0; 160 if (!substream->pcm->nonatomic) 161 local_irq_save(flags); 162 snd_pcm_stream_lock(substream); 163 return flags; 164 } 165 EXPORT_SYMBOL_GPL(_snd_pcm_stream_lock_irqsave); 166 167 /** 168 * snd_pcm_stream_unlock_irqrestore - Unlock the PCM stream 169 * @substream: PCM substream 170 * @flags: irq flags 171 * 172 * This is a counter-part of snd_pcm_stream_lock_irqsave(). 173 */ 174 void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream, 175 unsigned long flags) 176 { 177 snd_pcm_stream_unlock(substream); 178 if (!substream->pcm->nonatomic) 179 local_irq_restore(flags); 180 } 181 EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irqrestore); 182 183 static inline mm_segment_t snd_enter_user(void) 184 { 185 mm_segment_t fs = get_fs(); 186 set_fs(get_ds()); 187 return fs; 188 } 189 190 static inline void snd_leave_user(mm_segment_t fs) 191 { 192 set_fs(fs); 193 } 194 195 196 197 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info) 198 { 199 struct snd_pcm_runtime *runtime; 200 struct snd_pcm *pcm = substream->pcm; 201 struct snd_pcm_str *pstr = substream->pstr; 202 203 memset(info, 0, sizeof(*info)); 204 info->card = pcm->card->number; 205 info->device = pcm->device; 206 info->stream = substream->stream; 207 info->subdevice = substream->number; 208 strlcpy(info->id, pcm->id, sizeof(info->id)); 209 strlcpy(info->name, pcm->name, sizeof(info->name)); 210 info->dev_class = pcm->dev_class; 211 info->dev_subclass = pcm->dev_subclass; 212 info->subdevices_count = pstr->substream_count; 213 info->subdevices_avail = pstr->substream_count - pstr->substream_opened; 214 strlcpy(info->subname, substream->name, sizeof(info->subname)); 215 runtime = substream->runtime; 216 /* AB: FIXME!!! This is definitely nonsense */ 217 if (runtime) { 218 info->sync = runtime->sync; 219 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info); 220 } 221 return 0; 222 } 223 224 int snd_pcm_info_user(struct snd_pcm_substream *substream, 225 struct snd_pcm_info __user * _info) 226 { 227 struct snd_pcm_info *info; 228 int err; 229 230 info = kmalloc(sizeof(*info), GFP_KERNEL); 231 if (! info) 232 return -ENOMEM; 233 err = snd_pcm_info(substream, info); 234 if (err >= 0) { 235 if (copy_to_user(_info, info, sizeof(*info))) 236 err = -EFAULT; 237 } 238 kfree(info); 239 return err; 240 } 241 242 static bool hw_support_mmap(struct snd_pcm_substream *substream) 243 { 244 if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_MMAP)) 245 return false; 246 /* check architectures that return -EINVAL from dma_mmap_coherent() */ 247 /* FIXME: this should be some global flag */ 248 #if defined(CONFIG_C6X) || defined(CONFIG_FRV) || defined(CONFIG_MN10300) ||\ 249 defined(CONFIG_PARISC) || defined(CONFIG_XTENSA) 250 if (!substream->ops->mmap && 251 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) 252 return false; 253 #endif 254 return true; 255 } 256 257 #undef RULES_DEBUG 258 259 #ifdef RULES_DEBUG 260 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v 261 static const char * const snd_pcm_hw_param_names[] = { 262 HW_PARAM(ACCESS), 263 HW_PARAM(FORMAT), 264 HW_PARAM(SUBFORMAT), 265 HW_PARAM(SAMPLE_BITS), 266 HW_PARAM(FRAME_BITS), 267 HW_PARAM(CHANNELS), 268 HW_PARAM(RATE), 269 HW_PARAM(PERIOD_TIME), 270 HW_PARAM(PERIOD_SIZE), 271 HW_PARAM(PERIOD_BYTES), 272 HW_PARAM(PERIODS), 273 HW_PARAM(BUFFER_TIME), 274 HW_PARAM(BUFFER_SIZE), 275 HW_PARAM(BUFFER_BYTES), 276 HW_PARAM(TICK_TIME), 277 }; 278 #endif 279 280 int snd_pcm_hw_refine(struct snd_pcm_substream *substream, 281 struct snd_pcm_hw_params *params) 282 { 283 unsigned int k; 284 struct snd_pcm_hardware *hw; 285 struct snd_interval *i = NULL; 286 struct snd_mask *m = NULL; 287 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints; 288 unsigned int rstamps[constrs->rules_num]; 289 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1]; 290 unsigned int stamp = 2; 291 int changed, again; 292 293 params->info = 0; 294 params->fifo_size = 0; 295 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS)) 296 params->msbits = 0; 297 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) { 298 params->rate_num = 0; 299 params->rate_den = 0; 300 } 301 302 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { 303 m = hw_param_mask(params, k); 304 if (snd_mask_empty(m)) 305 return -EINVAL; 306 if (!(params->rmask & (1 << k))) 307 continue; 308 #ifdef RULES_DEBUG 309 pr_debug("%s = ", snd_pcm_hw_param_names[k]); 310 pr_cont("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); 311 #endif 312 changed = snd_mask_refine(m, constrs_mask(constrs, k)); 313 #ifdef RULES_DEBUG 314 pr_cont("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); 315 #endif 316 if (changed) 317 params->cmask |= 1 << k; 318 if (changed < 0) 319 return changed; 320 } 321 322 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { 323 i = hw_param_interval(params, k); 324 if (snd_interval_empty(i)) 325 return -EINVAL; 326 if (!(params->rmask & (1 << k))) 327 continue; 328 #ifdef RULES_DEBUG 329 pr_debug("%s = ", snd_pcm_hw_param_names[k]); 330 if (i->empty) 331 pr_cont("empty"); 332 else 333 pr_cont("%c%u %u%c", 334 i->openmin ? '(' : '[', i->min, 335 i->max, i->openmax ? ')' : ']'); 336 pr_cont(" -> "); 337 #endif 338 changed = snd_interval_refine(i, constrs_interval(constrs, k)); 339 #ifdef RULES_DEBUG 340 if (i->empty) 341 pr_cont("empty\n"); 342 else 343 pr_cont("%c%u %u%c\n", 344 i->openmin ? '(' : '[', i->min, 345 i->max, i->openmax ? ')' : ']'); 346 #endif 347 if (changed) 348 params->cmask |= 1 << k; 349 if (changed < 0) 350 return changed; 351 } 352 353 for (k = 0; k < constrs->rules_num; k++) 354 rstamps[k] = 0; 355 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) 356 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0; 357 do { 358 again = 0; 359 for (k = 0; k < constrs->rules_num; k++) { 360 struct snd_pcm_hw_rule *r = &constrs->rules[k]; 361 unsigned int d; 362 int doit = 0; 363 if (r->cond && !(r->cond & params->flags)) 364 continue; 365 for (d = 0; r->deps[d] >= 0; d++) { 366 if (vstamps[r->deps[d]] > rstamps[k]) { 367 doit = 1; 368 break; 369 } 370 } 371 if (!doit) 372 continue; 373 #ifdef RULES_DEBUG 374 pr_debug("Rule %d [%p]: ", k, r->func); 375 if (r->var >= 0) { 376 pr_cont("%s = ", snd_pcm_hw_param_names[r->var]); 377 if (hw_is_mask(r->var)) { 378 m = hw_param_mask(params, r->var); 379 pr_cont("%x", *m->bits); 380 } else { 381 i = hw_param_interval(params, r->var); 382 if (i->empty) 383 pr_cont("empty"); 384 else 385 pr_cont("%c%u %u%c", 386 i->openmin ? '(' : '[', i->min, 387 i->max, i->openmax ? ')' : ']'); 388 } 389 } 390 #endif 391 changed = r->func(params, r); 392 #ifdef RULES_DEBUG 393 if (r->var >= 0) { 394 pr_cont(" -> "); 395 if (hw_is_mask(r->var)) 396 pr_cont("%x", *m->bits); 397 else { 398 if (i->empty) 399 pr_cont("empty"); 400 else 401 pr_cont("%c%u %u%c", 402 i->openmin ? '(' : '[', i->min, 403 i->max, i->openmax ? ')' : ']'); 404 } 405 } 406 pr_cont("\n"); 407 #endif 408 rstamps[k] = stamp; 409 if (changed && r->var >= 0) { 410 params->cmask |= (1 << r->var); 411 vstamps[r->var] = stamp; 412 again = 1; 413 } 414 if (changed < 0) 415 return changed; 416 stamp++; 417 } 418 } while (again); 419 if (!params->msbits) { 420 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); 421 if (snd_interval_single(i)) 422 params->msbits = snd_interval_value(i); 423 } 424 425 if (!params->rate_den) { 426 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); 427 if (snd_interval_single(i)) { 428 params->rate_num = snd_interval_value(i); 429 params->rate_den = 1; 430 } 431 } 432 433 hw = &substream->runtime->hw; 434 if (!params->info) { 435 params->info = hw->info & ~(SNDRV_PCM_INFO_FIFO_IN_FRAMES | 436 SNDRV_PCM_INFO_DRAIN_TRIGGER); 437 if (!hw_support_mmap(substream)) 438 params->info &= ~(SNDRV_PCM_INFO_MMAP | 439 SNDRV_PCM_INFO_MMAP_VALID); 440 } 441 if (!params->fifo_size) { 442 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 443 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 444 if (snd_mask_min(m) == snd_mask_max(m) && 445 snd_interval_min(i) == snd_interval_max(i)) { 446 changed = substream->ops->ioctl(substream, 447 SNDRV_PCM_IOCTL1_FIFO_SIZE, params); 448 if (changed < 0) 449 return changed; 450 } 451 } 452 params->rmask = 0; 453 return 0; 454 } 455 456 EXPORT_SYMBOL(snd_pcm_hw_refine); 457 458 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream, 459 struct snd_pcm_hw_params __user * _params) 460 { 461 struct snd_pcm_hw_params *params; 462 int err; 463 464 params = memdup_user(_params, sizeof(*params)); 465 if (IS_ERR(params)) 466 return PTR_ERR(params); 467 468 err = snd_pcm_hw_refine(substream, params); 469 if (copy_to_user(_params, params, sizeof(*params))) { 470 if (!err) 471 err = -EFAULT; 472 } 473 474 kfree(params); 475 return err; 476 } 477 478 static int period_to_usecs(struct snd_pcm_runtime *runtime) 479 { 480 int usecs; 481 482 if (! runtime->rate) 483 return -1; /* invalid */ 484 485 /* take 75% of period time as the deadline */ 486 usecs = (750000 / runtime->rate) * runtime->period_size; 487 usecs += ((750000 % runtime->rate) * runtime->period_size) / 488 runtime->rate; 489 490 return usecs; 491 } 492 493 static void snd_pcm_set_state(struct snd_pcm_substream *substream, int state) 494 { 495 snd_pcm_stream_lock_irq(substream); 496 if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED) 497 substream->runtime->status->state = state; 498 snd_pcm_stream_unlock_irq(substream); 499 } 500 501 static inline void snd_pcm_timer_notify(struct snd_pcm_substream *substream, 502 int event) 503 { 504 #ifdef CONFIG_SND_PCM_TIMER 505 if (substream->timer) 506 snd_timer_notify(substream->timer, event, 507 &substream->runtime->trigger_tstamp); 508 #endif 509 } 510 511 static int snd_pcm_hw_params(struct snd_pcm_substream *substream, 512 struct snd_pcm_hw_params *params) 513 { 514 struct snd_pcm_runtime *runtime; 515 int err, usecs; 516 unsigned int bits; 517 snd_pcm_uframes_t frames; 518 519 if (PCM_RUNTIME_CHECK(substream)) 520 return -ENXIO; 521 runtime = substream->runtime; 522 snd_pcm_stream_lock_irq(substream); 523 switch (runtime->status->state) { 524 case SNDRV_PCM_STATE_OPEN: 525 case SNDRV_PCM_STATE_SETUP: 526 case SNDRV_PCM_STATE_PREPARED: 527 break; 528 default: 529 snd_pcm_stream_unlock_irq(substream); 530 return -EBADFD; 531 } 532 snd_pcm_stream_unlock_irq(substream); 533 #if IS_ENABLED(CONFIG_SND_PCM_OSS) 534 if (!substream->oss.oss) 535 #endif 536 if (atomic_read(&substream->mmap_count)) 537 return -EBADFD; 538 539 params->rmask = ~0U; 540 err = snd_pcm_hw_refine(substream, params); 541 if (err < 0) 542 goto _error; 543 544 err = snd_pcm_hw_params_choose(substream, params); 545 if (err < 0) 546 goto _error; 547 548 if (substream->ops->hw_params != NULL) { 549 err = substream->ops->hw_params(substream, params); 550 if (err < 0) 551 goto _error; 552 } 553 554 runtime->access = params_access(params); 555 runtime->format = params_format(params); 556 runtime->subformat = params_subformat(params); 557 runtime->channels = params_channels(params); 558 runtime->rate = params_rate(params); 559 runtime->period_size = params_period_size(params); 560 runtime->periods = params_periods(params); 561 runtime->buffer_size = params_buffer_size(params); 562 runtime->info = params->info; 563 runtime->rate_num = params->rate_num; 564 runtime->rate_den = params->rate_den; 565 runtime->no_period_wakeup = 566 (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) && 567 (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP); 568 569 bits = snd_pcm_format_physical_width(runtime->format); 570 runtime->sample_bits = bits; 571 bits *= runtime->channels; 572 runtime->frame_bits = bits; 573 frames = 1; 574 while (bits % 8 != 0) { 575 bits *= 2; 576 frames *= 2; 577 } 578 runtime->byte_align = bits / 8; 579 runtime->min_align = frames; 580 581 /* Default sw params */ 582 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; 583 runtime->period_step = 1; 584 runtime->control->avail_min = runtime->period_size; 585 runtime->start_threshold = 1; 586 runtime->stop_threshold = runtime->buffer_size; 587 runtime->silence_threshold = 0; 588 runtime->silence_size = 0; 589 runtime->boundary = runtime->buffer_size; 590 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size) 591 runtime->boundary *= 2; 592 593 snd_pcm_timer_resolution_change(substream); 594 snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP); 595 596 if (pm_qos_request_active(&substream->latency_pm_qos_req)) 597 pm_qos_remove_request(&substream->latency_pm_qos_req); 598 if ((usecs = period_to_usecs(runtime)) >= 0) 599 pm_qos_add_request(&substream->latency_pm_qos_req, 600 PM_QOS_CPU_DMA_LATENCY, usecs); 601 return 0; 602 _error: 603 /* hardware might be unusable from this time, 604 so we force application to retry to set 605 the correct hardware parameter settings */ 606 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN); 607 if (substream->ops->hw_free != NULL) 608 substream->ops->hw_free(substream); 609 return err; 610 } 611 612 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream, 613 struct snd_pcm_hw_params __user * _params) 614 { 615 struct snd_pcm_hw_params *params; 616 int err; 617 618 params = memdup_user(_params, sizeof(*params)); 619 if (IS_ERR(params)) 620 return PTR_ERR(params); 621 622 err = snd_pcm_hw_params(substream, params); 623 if (copy_to_user(_params, params, sizeof(*params))) { 624 if (!err) 625 err = -EFAULT; 626 } 627 628 kfree(params); 629 return err; 630 } 631 632 static int snd_pcm_hw_free(struct snd_pcm_substream *substream) 633 { 634 struct snd_pcm_runtime *runtime; 635 int result = 0; 636 637 if (PCM_RUNTIME_CHECK(substream)) 638 return -ENXIO; 639 runtime = substream->runtime; 640 snd_pcm_stream_lock_irq(substream); 641 switch (runtime->status->state) { 642 case SNDRV_PCM_STATE_SETUP: 643 case SNDRV_PCM_STATE_PREPARED: 644 break; 645 default: 646 snd_pcm_stream_unlock_irq(substream); 647 return -EBADFD; 648 } 649 snd_pcm_stream_unlock_irq(substream); 650 if (atomic_read(&substream->mmap_count)) 651 return -EBADFD; 652 if (substream->ops->hw_free) 653 result = substream->ops->hw_free(substream); 654 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN); 655 pm_qos_remove_request(&substream->latency_pm_qos_req); 656 return result; 657 } 658 659 static int snd_pcm_sw_params(struct snd_pcm_substream *substream, 660 struct snd_pcm_sw_params *params) 661 { 662 struct snd_pcm_runtime *runtime; 663 int err; 664 665 if (PCM_RUNTIME_CHECK(substream)) 666 return -ENXIO; 667 runtime = substream->runtime; 668 snd_pcm_stream_lock_irq(substream); 669 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 670 snd_pcm_stream_unlock_irq(substream); 671 return -EBADFD; 672 } 673 snd_pcm_stream_unlock_irq(substream); 674 675 if (params->tstamp_mode < 0 || 676 params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST) 677 return -EINVAL; 678 if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12) && 679 params->tstamp_type > SNDRV_PCM_TSTAMP_TYPE_LAST) 680 return -EINVAL; 681 if (params->avail_min == 0) 682 return -EINVAL; 683 if (params->silence_size >= runtime->boundary) { 684 if (params->silence_threshold != 0) 685 return -EINVAL; 686 } else { 687 if (params->silence_size > params->silence_threshold) 688 return -EINVAL; 689 if (params->silence_threshold > runtime->buffer_size) 690 return -EINVAL; 691 } 692 err = 0; 693 snd_pcm_stream_lock_irq(substream); 694 runtime->tstamp_mode = params->tstamp_mode; 695 if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12)) 696 runtime->tstamp_type = params->tstamp_type; 697 runtime->period_step = params->period_step; 698 runtime->control->avail_min = params->avail_min; 699 runtime->start_threshold = params->start_threshold; 700 runtime->stop_threshold = params->stop_threshold; 701 runtime->silence_threshold = params->silence_threshold; 702 runtime->silence_size = params->silence_size; 703 params->boundary = runtime->boundary; 704 if (snd_pcm_running(substream)) { 705 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 706 runtime->silence_size > 0) 707 snd_pcm_playback_silence(substream, ULONG_MAX); 708 err = snd_pcm_update_state(substream, runtime); 709 } 710 snd_pcm_stream_unlock_irq(substream); 711 return err; 712 } 713 714 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream, 715 struct snd_pcm_sw_params __user * _params) 716 { 717 struct snd_pcm_sw_params params; 718 int err; 719 if (copy_from_user(¶ms, _params, sizeof(params))) 720 return -EFAULT; 721 err = snd_pcm_sw_params(substream, ¶ms); 722 if (copy_to_user(_params, ¶ms, sizeof(params))) 723 return -EFAULT; 724 return err; 725 } 726 727 int snd_pcm_status(struct snd_pcm_substream *substream, 728 struct snd_pcm_status *status) 729 { 730 struct snd_pcm_runtime *runtime = substream->runtime; 731 732 snd_pcm_stream_lock_irq(substream); 733 734 snd_pcm_unpack_audio_tstamp_config(status->audio_tstamp_data, 735 &runtime->audio_tstamp_config); 736 737 /* backwards compatible behavior */ 738 if (runtime->audio_tstamp_config.type_requested == 739 SNDRV_PCM_AUDIO_TSTAMP_TYPE_COMPAT) { 740 if (runtime->hw.info & SNDRV_PCM_INFO_HAS_WALL_CLOCK) 741 runtime->audio_tstamp_config.type_requested = 742 SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK; 743 else 744 runtime->audio_tstamp_config.type_requested = 745 SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT; 746 runtime->audio_tstamp_report.valid = 0; 747 } else 748 runtime->audio_tstamp_report.valid = 1; 749 750 status->state = runtime->status->state; 751 status->suspended_state = runtime->status->suspended_state; 752 if (status->state == SNDRV_PCM_STATE_OPEN) 753 goto _end; 754 status->trigger_tstamp = runtime->trigger_tstamp; 755 if (snd_pcm_running(substream)) { 756 snd_pcm_update_hw_ptr(substream); 757 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { 758 status->tstamp = runtime->status->tstamp; 759 status->driver_tstamp = runtime->driver_tstamp; 760 status->audio_tstamp = 761 runtime->status->audio_tstamp; 762 if (runtime->audio_tstamp_report.valid == 1) 763 /* backwards compatibility, no report provided in COMPAT mode */ 764 snd_pcm_pack_audio_tstamp_report(&status->audio_tstamp_data, 765 &status->audio_tstamp_accuracy, 766 &runtime->audio_tstamp_report); 767 768 goto _tstamp_end; 769 } 770 } else { 771 /* get tstamp only in fallback mode and only if enabled */ 772 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) 773 snd_pcm_gettime(runtime, &status->tstamp); 774 } 775 _tstamp_end: 776 status->appl_ptr = runtime->control->appl_ptr; 777 status->hw_ptr = runtime->status->hw_ptr; 778 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 779 status->avail = snd_pcm_playback_avail(runtime); 780 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING || 781 runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 782 status->delay = runtime->buffer_size - status->avail; 783 status->delay += runtime->delay; 784 } else 785 status->delay = 0; 786 } else { 787 status->avail = snd_pcm_capture_avail(runtime); 788 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) 789 status->delay = status->avail + runtime->delay; 790 else 791 status->delay = 0; 792 } 793 status->avail_max = runtime->avail_max; 794 status->overrange = runtime->overrange; 795 runtime->avail_max = 0; 796 runtime->overrange = 0; 797 _end: 798 snd_pcm_stream_unlock_irq(substream); 799 return 0; 800 } 801 802 static int snd_pcm_status_user(struct snd_pcm_substream *substream, 803 struct snd_pcm_status __user * _status, 804 bool ext) 805 { 806 struct snd_pcm_status status; 807 int res; 808 809 memset(&status, 0, sizeof(status)); 810 /* 811 * with extension, parameters are read/write, 812 * get audio_tstamp_data from user, 813 * ignore rest of status structure 814 */ 815 if (ext && get_user(status.audio_tstamp_data, 816 (u32 __user *)(&_status->audio_tstamp_data))) 817 return -EFAULT; 818 res = snd_pcm_status(substream, &status); 819 if (res < 0) 820 return res; 821 if (copy_to_user(_status, &status, sizeof(status))) 822 return -EFAULT; 823 return 0; 824 } 825 826 static int snd_pcm_channel_info(struct snd_pcm_substream *substream, 827 struct snd_pcm_channel_info * info) 828 { 829 struct snd_pcm_runtime *runtime; 830 unsigned int channel; 831 832 channel = info->channel; 833 runtime = substream->runtime; 834 snd_pcm_stream_lock_irq(substream); 835 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 836 snd_pcm_stream_unlock_irq(substream); 837 return -EBADFD; 838 } 839 snd_pcm_stream_unlock_irq(substream); 840 if (channel >= runtime->channels) 841 return -EINVAL; 842 memset(info, 0, sizeof(*info)); 843 info->channel = channel; 844 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info); 845 } 846 847 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream, 848 struct snd_pcm_channel_info __user * _info) 849 { 850 struct snd_pcm_channel_info info; 851 int res; 852 853 if (copy_from_user(&info, _info, sizeof(info))) 854 return -EFAULT; 855 res = snd_pcm_channel_info(substream, &info); 856 if (res < 0) 857 return res; 858 if (copy_to_user(_info, &info, sizeof(info))) 859 return -EFAULT; 860 return 0; 861 } 862 863 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream) 864 { 865 struct snd_pcm_runtime *runtime = substream->runtime; 866 if (runtime->trigger_master == NULL) 867 return; 868 if (runtime->trigger_master == substream) { 869 if (!runtime->trigger_tstamp_latched) 870 snd_pcm_gettime(runtime, &runtime->trigger_tstamp); 871 } else { 872 snd_pcm_trigger_tstamp(runtime->trigger_master); 873 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp; 874 } 875 runtime->trigger_master = NULL; 876 } 877 878 struct action_ops { 879 int (*pre_action)(struct snd_pcm_substream *substream, int state); 880 int (*do_action)(struct snd_pcm_substream *substream, int state); 881 void (*undo_action)(struct snd_pcm_substream *substream, int state); 882 void (*post_action)(struct snd_pcm_substream *substream, int state); 883 }; 884 885 /* 886 * this functions is core for handling of linked stream 887 * Note: the stream state might be changed also on failure 888 * Note2: call with calling stream lock + link lock 889 */ 890 static int snd_pcm_action_group(const struct action_ops *ops, 891 struct snd_pcm_substream *substream, 892 int state, int do_lock) 893 { 894 struct snd_pcm_substream *s = NULL; 895 struct snd_pcm_substream *s1; 896 int res = 0, depth = 1; 897 898 snd_pcm_group_for_each_entry(s, substream) { 899 if (do_lock && s != substream) { 900 if (s->pcm->nonatomic) 901 mutex_lock_nested(&s->self_group.mutex, depth); 902 else 903 spin_lock_nested(&s->self_group.lock, depth); 904 depth++; 905 } 906 res = ops->pre_action(s, state); 907 if (res < 0) 908 goto _unlock; 909 } 910 snd_pcm_group_for_each_entry(s, substream) { 911 res = ops->do_action(s, state); 912 if (res < 0) { 913 if (ops->undo_action) { 914 snd_pcm_group_for_each_entry(s1, substream) { 915 if (s1 == s) /* failed stream */ 916 break; 917 ops->undo_action(s1, state); 918 } 919 } 920 s = NULL; /* unlock all */ 921 goto _unlock; 922 } 923 } 924 snd_pcm_group_for_each_entry(s, substream) { 925 ops->post_action(s, state); 926 } 927 _unlock: 928 if (do_lock) { 929 /* unlock streams */ 930 snd_pcm_group_for_each_entry(s1, substream) { 931 if (s1 != substream) { 932 if (s1->pcm->nonatomic) 933 mutex_unlock(&s1->self_group.mutex); 934 else 935 spin_unlock(&s1->self_group.lock); 936 } 937 if (s1 == s) /* end */ 938 break; 939 } 940 } 941 return res; 942 } 943 944 /* 945 * Note: call with stream lock 946 */ 947 static int snd_pcm_action_single(const struct action_ops *ops, 948 struct snd_pcm_substream *substream, 949 int state) 950 { 951 int res; 952 953 res = ops->pre_action(substream, state); 954 if (res < 0) 955 return res; 956 res = ops->do_action(substream, state); 957 if (res == 0) 958 ops->post_action(substream, state); 959 else if (ops->undo_action) 960 ops->undo_action(substream, state); 961 return res; 962 } 963 964 /* 965 * Note: call with stream lock 966 */ 967 static int snd_pcm_action(const struct action_ops *ops, 968 struct snd_pcm_substream *substream, 969 int state) 970 { 971 int res; 972 973 if (!snd_pcm_stream_linked(substream)) 974 return snd_pcm_action_single(ops, substream, state); 975 976 if (substream->pcm->nonatomic) { 977 if (!mutex_trylock(&substream->group->mutex)) { 978 mutex_unlock(&substream->self_group.mutex); 979 mutex_lock(&substream->group->mutex); 980 mutex_lock(&substream->self_group.mutex); 981 } 982 res = snd_pcm_action_group(ops, substream, state, 1); 983 mutex_unlock(&substream->group->mutex); 984 } else { 985 if (!spin_trylock(&substream->group->lock)) { 986 spin_unlock(&substream->self_group.lock); 987 spin_lock(&substream->group->lock); 988 spin_lock(&substream->self_group.lock); 989 } 990 res = snd_pcm_action_group(ops, substream, state, 1); 991 spin_unlock(&substream->group->lock); 992 } 993 return res; 994 } 995 996 /* 997 * Note: don't use any locks before 998 */ 999 static int snd_pcm_action_lock_irq(const struct action_ops *ops, 1000 struct snd_pcm_substream *substream, 1001 int state) 1002 { 1003 int res; 1004 1005 snd_pcm_stream_lock_irq(substream); 1006 res = snd_pcm_action(ops, substream, state); 1007 snd_pcm_stream_unlock_irq(substream); 1008 return res; 1009 } 1010 1011 /* 1012 */ 1013 static int snd_pcm_action_nonatomic(const struct action_ops *ops, 1014 struct snd_pcm_substream *substream, 1015 int state) 1016 { 1017 int res; 1018 1019 down_read(&snd_pcm_link_rwsem); 1020 if (snd_pcm_stream_linked(substream)) 1021 res = snd_pcm_action_group(ops, substream, state, 0); 1022 else 1023 res = snd_pcm_action_single(ops, substream, state); 1024 up_read(&snd_pcm_link_rwsem); 1025 return res; 1026 } 1027 1028 /* 1029 * start callbacks 1030 */ 1031 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state) 1032 { 1033 struct snd_pcm_runtime *runtime = substream->runtime; 1034 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED) 1035 return -EBADFD; 1036 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 1037 !snd_pcm_playback_data(substream)) 1038 return -EPIPE; 1039 runtime->trigger_tstamp_latched = false; 1040 runtime->trigger_master = substream; 1041 return 0; 1042 } 1043 1044 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state) 1045 { 1046 if (substream->runtime->trigger_master != substream) 1047 return 0; 1048 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START); 1049 } 1050 1051 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state) 1052 { 1053 if (substream->runtime->trigger_master == substream) 1054 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); 1055 } 1056 1057 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state) 1058 { 1059 struct snd_pcm_runtime *runtime = substream->runtime; 1060 snd_pcm_trigger_tstamp(substream); 1061 runtime->hw_ptr_jiffies = jiffies; 1062 runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) / 1063 runtime->rate; 1064 runtime->status->state = state; 1065 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 1066 runtime->silence_size > 0) 1067 snd_pcm_playback_silence(substream, ULONG_MAX); 1068 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTART); 1069 } 1070 1071 static const struct action_ops snd_pcm_action_start = { 1072 .pre_action = snd_pcm_pre_start, 1073 .do_action = snd_pcm_do_start, 1074 .undo_action = snd_pcm_undo_start, 1075 .post_action = snd_pcm_post_start 1076 }; 1077 1078 /** 1079 * snd_pcm_start - start all linked streams 1080 * @substream: the PCM substream instance 1081 * 1082 * Return: Zero if successful, or a negative error code. 1083 */ 1084 int snd_pcm_start(struct snd_pcm_substream *substream) 1085 { 1086 return snd_pcm_action(&snd_pcm_action_start, substream, 1087 SNDRV_PCM_STATE_RUNNING); 1088 } 1089 1090 /* 1091 * stop callbacks 1092 */ 1093 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state) 1094 { 1095 struct snd_pcm_runtime *runtime = substream->runtime; 1096 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 1097 return -EBADFD; 1098 runtime->trigger_master = substream; 1099 return 0; 1100 } 1101 1102 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state) 1103 { 1104 if (substream->runtime->trigger_master == substream && 1105 snd_pcm_running(substream)) 1106 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); 1107 return 0; /* unconditonally stop all substreams */ 1108 } 1109 1110 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state) 1111 { 1112 struct snd_pcm_runtime *runtime = substream->runtime; 1113 if (runtime->status->state != state) { 1114 snd_pcm_trigger_tstamp(substream); 1115 runtime->status->state = state; 1116 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTOP); 1117 } 1118 wake_up(&runtime->sleep); 1119 wake_up(&runtime->tsleep); 1120 } 1121 1122 static const struct action_ops snd_pcm_action_stop = { 1123 .pre_action = snd_pcm_pre_stop, 1124 .do_action = snd_pcm_do_stop, 1125 .post_action = snd_pcm_post_stop 1126 }; 1127 1128 /** 1129 * snd_pcm_stop - try to stop all running streams in the substream group 1130 * @substream: the PCM substream instance 1131 * @state: PCM state after stopping the stream 1132 * 1133 * The state of each stream is then changed to the given state unconditionally. 1134 * 1135 * Return: Zero if successful, or a negative error code. 1136 */ 1137 int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state) 1138 { 1139 return snd_pcm_action(&snd_pcm_action_stop, substream, state); 1140 } 1141 1142 EXPORT_SYMBOL(snd_pcm_stop); 1143 1144 /** 1145 * snd_pcm_drain_done - stop the DMA only when the given stream is playback 1146 * @substream: the PCM substream 1147 * 1148 * After stopping, the state is changed to SETUP. 1149 * Unlike snd_pcm_stop(), this affects only the given stream. 1150 * 1151 * Return: Zero if succesful, or a negative error code. 1152 */ 1153 int snd_pcm_drain_done(struct snd_pcm_substream *substream) 1154 { 1155 return snd_pcm_action_single(&snd_pcm_action_stop, substream, 1156 SNDRV_PCM_STATE_SETUP); 1157 } 1158 1159 /** 1160 * snd_pcm_stop_xrun - stop the running streams as XRUN 1161 * @substream: the PCM substream instance 1162 * 1163 * This stops the given running substream (and all linked substreams) as XRUN. 1164 * Unlike snd_pcm_stop(), this function takes the substream lock by itself. 1165 * 1166 * Return: Zero if successful, or a negative error code. 1167 */ 1168 int snd_pcm_stop_xrun(struct snd_pcm_substream *substream) 1169 { 1170 unsigned long flags; 1171 int ret = 0; 1172 1173 snd_pcm_stream_lock_irqsave(substream, flags); 1174 if (snd_pcm_running(substream)) 1175 ret = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); 1176 snd_pcm_stream_unlock_irqrestore(substream, flags); 1177 return ret; 1178 } 1179 EXPORT_SYMBOL_GPL(snd_pcm_stop_xrun); 1180 1181 /* 1182 * pause callbacks 1183 */ 1184 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push) 1185 { 1186 struct snd_pcm_runtime *runtime = substream->runtime; 1187 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE)) 1188 return -ENOSYS; 1189 if (push) { 1190 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING) 1191 return -EBADFD; 1192 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED) 1193 return -EBADFD; 1194 runtime->trigger_master = substream; 1195 return 0; 1196 } 1197 1198 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push) 1199 { 1200 if (substream->runtime->trigger_master != substream) 1201 return 0; 1202 /* some drivers might use hw_ptr to recover from the pause - 1203 update the hw_ptr now */ 1204 if (push) 1205 snd_pcm_update_hw_ptr(substream); 1206 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by 1207 * a delta between the current jiffies, this gives a large enough 1208 * delta, effectively to skip the check once. 1209 */ 1210 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000; 1211 return substream->ops->trigger(substream, 1212 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH : 1213 SNDRV_PCM_TRIGGER_PAUSE_RELEASE); 1214 } 1215 1216 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push) 1217 { 1218 if (substream->runtime->trigger_master == substream) 1219 substream->ops->trigger(substream, 1220 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE : 1221 SNDRV_PCM_TRIGGER_PAUSE_PUSH); 1222 } 1223 1224 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push) 1225 { 1226 struct snd_pcm_runtime *runtime = substream->runtime; 1227 snd_pcm_trigger_tstamp(substream); 1228 if (push) { 1229 runtime->status->state = SNDRV_PCM_STATE_PAUSED; 1230 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MPAUSE); 1231 wake_up(&runtime->sleep); 1232 wake_up(&runtime->tsleep); 1233 } else { 1234 runtime->status->state = SNDRV_PCM_STATE_RUNNING; 1235 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MCONTINUE); 1236 } 1237 } 1238 1239 static const struct action_ops snd_pcm_action_pause = { 1240 .pre_action = snd_pcm_pre_pause, 1241 .do_action = snd_pcm_do_pause, 1242 .undo_action = snd_pcm_undo_pause, 1243 .post_action = snd_pcm_post_pause 1244 }; 1245 1246 /* 1247 * Push/release the pause for all linked streams. 1248 */ 1249 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push) 1250 { 1251 return snd_pcm_action(&snd_pcm_action_pause, substream, push); 1252 } 1253 1254 #ifdef CONFIG_PM 1255 /* suspend */ 1256 1257 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state) 1258 { 1259 struct snd_pcm_runtime *runtime = substream->runtime; 1260 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1261 return -EBUSY; 1262 runtime->trigger_master = substream; 1263 return 0; 1264 } 1265 1266 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state) 1267 { 1268 struct snd_pcm_runtime *runtime = substream->runtime; 1269 if (runtime->trigger_master != substream) 1270 return 0; 1271 if (! snd_pcm_running(substream)) 1272 return 0; 1273 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); 1274 return 0; /* suspend unconditionally */ 1275 } 1276 1277 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state) 1278 { 1279 struct snd_pcm_runtime *runtime = substream->runtime; 1280 snd_pcm_trigger_tstamp(substream); 1281 runtime->status->suspended_state = runtime->status->state; 1282 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED; 1283 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSUSPEND); 1284 wake_up(&runtime->sleep); 1285 wake_up(&runtime->tsleep); 1286 } 1287 1288 static const struct action_ops snd_pcm_action_suspend = { 1289 .pre_action = snd_pcm_pre_suspend, 1290 .do_action = snd_pcm_do_suspend, 1291 .post_action = snd_pcm_post_suspend 1292 }; 1293 1294 /** 1295 * snd_pcm_suspend - trigger SUSPEND to all linked streams 1296 * @substream: the PCM substream 1297 * 1298 * After this call, all streams are changed to SUSPENDED state. 1299 * 1300 * Return: Zero if successful (or @substream is %NULL), or a negative error 1301 * code. 1302 */ 1303 int snd_pcm_suspend(struct snd_pcm_substream *substream) 1304 { 1305 int err; 1306 unsigned long flags; 1307 1308 if (! substream) 1309 return 0; 1310 1311 snd_pcm_stream_lock_irqsave(substream, flags); 1312 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0); 1313 snd_pcm_stream_unlock_irqrestore(substream, flags); 1314 return err; 1315 } 1316 1317 EXPORT_SYMBOL(snd_pcm_suspend); 1318 1319 /** 1320 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm 1321 * @pcm: the PCM instance 1322 * 1323 * After this call, all streams are changed to SUSPENDED state. 1324 * 1325 * Return: Zero if successful (or @pcm is %NULL), or a negative error code. 1326 */ 1327 int snd_pcm_suspend_all(struct snd_pcm *pcm) 1328 { 1329 struct snd_pcm_substream *substream; 1330 int stream, err = 0; 1331 1332 if (! pcm) 1333 return 0; 1334 1335 for (stream = 0; stream < 2; stream++) { 1336 for (substream = pcm->streams[stream].substream; 1337 substream; substream = substream->next) { 1338 /* FIXME: the open/close code should lock this as well */ 1339 if (substream->runtime == NULL) 1340 continue; 1341 err = snd_pcm_suspend(substream); 1342 if (err < 0 && err != -EBUSY) 1343 return err; 1344 } 1345 } 1346 return 0; 1347 } 1348 1349 EXPORT_SYMBOL(snd_pcm_suspend_all); 1350 1351 /* resume */ 1352 1353 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state) 1354 { 1355 struct snd_pcm_runtime *runtime = substream->runtime; 1356 if (!(runtime->info & SNDRV_PCM_INFO_RESUME)) 1357 return -ENOSYS; 1358 runtime->trigger_master = substream; 1359 return 0; 1360 } 1361 1362 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state) 1363 { 1364 struct snd_pcm_runtime *runtime = substream->runtime; 1365 if (runtime->trigger_master != substream) 1366 return 0; 1367 /* DMA not running previously? */ 1368 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING && 1369 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING || 1370 substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) 1371 return 0; 1372 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME); 1373 } 1374 1375 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state) 1376 { 1377 if (substream->runtime->trigger_master == substream && 1378 snd_pcm_running(substream)) 1379 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); 1380 } 1381 1382 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state) 1383 { 1384 struct snd_pcm_runtime *runtime = substream->runtime; 1385 snd_pcm_trigger_tstamp(substream); 1386 runtime->status->state = runtime->status->suspended_state; 1387 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MRESUME); 1388 } 1389 1390 static const struct action_ops snd_pcm_action_resume = { 1391 .pre_action = snd_pcm_pre_resume, 1392 .do_action = snd_pcm_do_resume, 1393 .undo_action = snd_pcm_undo_resume, 1394 .post_action = snd_pcm_post_resume 1395 }; 1396 1397 static int snd_pcm_resume(struct snd_pcm_substream *substream) 1398 { 1399 struct snd_card *card = substream->pcm->card; 1400 int res; 1401 1402 snd_power_lock(card); 1403 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) 1404 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0); 1405 snd_power_unlock(card); 1406 return res; 1407 } 1408 1409 #else 1410 1411 static int snd_pcm_resume(struct snd_pcm_substream *substream) 1412 { 1413 return -ENOSYS; 1414 } 1415 1416 #endif /* CONFIG_PM */ 1417 1418 /* 1419 * xrun ioctl 1420 * 1421 * Change the RUNNING stream(s) to XRUN state. 1422 */ 1423 static int snd_pcm_xrun(struct snd_pcm_substream *substream) 1424 { 1425 struct snd_card *card = substream->pcm->card; 1426 struct snd_pcm_runtime *runtime = substream->runtime; 1427 int result; 1428 1429 snd_power_lock(card); 1430 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1431 result = snd_power_wait(card, SNDRV_CTL_POWER_D0); 1432 if (result < 0) 1433 goto _unlock; 1434 } 1435 1436 snd_pcm_stream_lock_irq(substream); 1437 switch (runtime->status->state) { 1438 case SNDRV_PCM_STATE_XRUN: 1439 result = 0; /* already there */ 1440 break; 1441 case SNDRV_PCM_STATE_RUNNING: 1442 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); 1443 break; 1444 default: 1445 result = -EBADFD; 1446 } 1447 snd_pcm_stream_unlock_irq(substream); 1448 _unlock: 1449 snd_power_unlock(card); 1450 return result; 1451 } 1452 1453 /* 1454 * reset ioctl 1455 */ 1456 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state) 1457 { 1458 struct snd_pcm_runtime *runtime = substream->runtime; 1459 switch (runtime->status->state) { 1460 case SNDRV_PCM_STATE_RUNNING: 1461 case SNDRV_PCM_STATE_PREPARED: 1462 case SNDRV_PCM_STATE_PAUSED: 1463 case SNDRV_PCM_STATE_SUSPENDED: 1464 return 0; 1465 default: 1466 return -EBADFD; 1467 } 1468 } 1469 1470 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state) 1471 { 1472 struct snd_pcm_runtime *runtime = substream->runtime; 1473 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL); 1474 if (err < 0) 1475 return err; 1476 runtime->hw_ptr_base = 0; 1477 runtime->hw_ptr_interrupt = runtime->status->hw_ptr - 1478 runtime->status->hw_ptr % runtime->period_size; 1479 runtime->silence_start = runtime->status->hw_ptr; 1480 runtime->silence_filled = 0; 1481 return 0; 1482 } 1483 1484 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state) 1485 { 1486 struct snd_pcm_runtime *runtime = substream->runtime; 1487 runtime->control->appl_ptr = runtime->status->hw_ptr; 1488 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 1489 runtime->silence_size > 0) 1490 snd_pcm_playback_silence(substream, ULONG_MAX); 1491 } 1492 1493 static const struct action_ops snd_pcm_action_reset = { 1494 .pre_action = snd_pcm_pre_reset, 1495 .do_action = snd_pcm_do_reset, 1496 .post_action = snd_pcm_post_reset 1497 }; 1498 1499 static int snd_pcm_reset(struct snd_pcm_substream *substream) 1500 { 1501 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0); 1502 } 1503 1504 /* 1505 * prepare ioctl 1506 */ 1507 /* we use the second argument for updating f_flags */ 1508 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream, 1509 int f_flags) 1510 { 1511 struct snd_pcm_runtime *runtime = substream->runtime; 1512 if (runtime->status->state == SNDRV_PCM_STATE_OPEN || 1513 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED) 1514 return -EBADFD; 1515 if (snd_pcm_running(substream)) 1516 return -EBUSY; 1517 substream->f_flags = f_flags; 1518 return 0; 1519 } 1520 1521 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state) 1522 { 1523 int err; 1524 err = substream->ops->prepare(substream); 1525 if (err < 0) 1526 return err; 1527 return snd_pcm_do_reset(substream, 0); 1528 } 1529 1530 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state) 1531 { 1532 struct snd_pcm_runtime *runtime = substream->runtime; 1533 runtime->control->appl_ptr = runtime->status->hw_ptr; 1534 snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED); 1535 } 1536 1537 static const struct action_ops snd_pcm_action_prepare = { 1538 .pre_action = snd_pcm_pre_prepare, 1539 .do_action = snd_pcm_do_prepare, 1540 .post_action = snd_pcm_post_prepare 1541 }; 1542 1543 /** 1544 * snd_pcm_prepare - prepare the PCM substream to be triggerable 1545 * @substream: the PCM substream instance 1546 * @file: file to refer f_flags 1547 * 1548 * Return: Zero if successful, or a negative error code. 1549 */ 1550 static int snd_pcm_prepare(struct snd_pcm_substream *substream, 1551 struct file *file) 1552 { 1553 int res; 1554 struct snd_card *card = substream->pcm->card; 1555 int f_flags; 1556 1557 if (file) 1558 f_flags = file->f_flags; 1559 else 1560 f_flags = substream->f_flags; 1561 1562 snd_power_lock(card); 1563 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) 1564 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare, 1565 substream, f_flags); 1566 snd_power_unlock(card); 1567 return res; 1568 } 1569 1570 /* 1571 * drain ioctl 1572 */ 1573 1574 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state) 1575 { 1576 struct snd_pcm_runtime *runtime = substream->runtime; 1577 switch (runtime->status->state) { 1578 case SNDRV_PCM_STATE_OPEN: 1579 case SNDRV_PCM_STATE_DISCONNECTED: 1580 case SNDRV_PCM_STATE_SUSPENDED: 1581 return -EBADFD; 1582 } 1583 runtime->trigger_master = substream; 1584 return 0; 1585 } 1586 1587 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state) 1588 { 1589 struct snd_pcm_runtime *runtime = substream->runtime; 1590 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 1591 switch (runtime->status->state) { 1592 case SNDRV_PCM_STATE_PREPARED: 1593 /* start playback stream if possible */ 1594 if (! snd_pcm_playback_empty(substream)) { 1595 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING); 1596 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING); 1597 } else { 1598 runtime->status->state = SNDRV_PCM_STATE_SETUP; 1599 } 1600 break; 1601 case SNDRV_PCM_STATE_RUNNING: 1602 runtime->status->state = SNDRV_PCM_STATE_DRAINING; 1603 break; 1604 case SNDRV_PCM_STATE_XRUN: 1605 runtime->status->state = SNDRV_PCM_STATE_SETUP; 1606 break; 1607 default: 1608 break; 1609 } 1610 } else { 1611 /* stop running stream */ 1612 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) { 1613 int new_state = snd_pcm_capture_avail(runtime) > 0 ? 1614 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP; 1615 snd_pcm_do_stop(substream, new_state); 1616 snd_pcm_post_stop(substream, new_state); 1617 } 1618 } 1619 1620 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING && 1621 runtime->trigger_master == substream && 1622 (runtime->hw.info & SNDRV_PCM_INFO_DRAIN_TRIGGER)) 1623 return substream->ops->trigger(substream, 1624 SNDRV_PCM_TRIGGER_DRAIN); 1625 1626 return 0; 1627 } 1628 1629 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state) 1630 { 1631 } 1632 1633 static const struct action_ops snd_pcm_action_drain_init = { 1634 .pre_action = snd_pcm_pre_drain_init, 1635 .do_action = snd_pcm_do_drain_init, 1636 .post_action = snd_pcm_post_drain_init 1637 }; 1638 1639 static int snd_pcm_drop(struct snd_pcm_substream *substream); 1640 1641 /* 1642 * Drain the stream(s). 1643 * When the substream is linked, sync until the draining of all playback streams 1644 * is finished. 1645 * After this call, all streams are supposed to be either SETUP or DRAINING 1646 * (capture only) state. 1647 */ 1648 static int snd_pcm_drain(struct snd_pcm_substream *substream, 1649 struct file *file) 1650 { 1651 struct snd_card *card; 1652 struct snd_pcm_runtime *runtime; 1653 struct snd_pcm_substream *s; 1654 wait_queue_t wait; 1655 int result = 0; 1656 int nonblock = 0; 1657 1658 card = substream->pcm->card; 1659 runtime = substream->runtime; 1660 1661 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 1662 return -EBADFD; 1663 1664 snd_power_lock(card); 1665 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1666 result = snd_power_wait(card, SNDRV_CTL_POWER_D0); 1667 if (result < 0) { 1668 snd_power_unlock(card); 1669 return result; 1670 } 1671 } 1672 1673 if (file) { 1674 if (file->f_flags & O_NONBLOCK) 1675 nonblock = 1; 1676 } else if (substream->f_flags & O_NONBLOCK) 1677 nonblock = 1; 1678 1679 down_read(&snd_pcm_link_rwsem); 1680 snd_pcm_stream_lock_irq(substream); 1681 /* resume pause */ 1682 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) 1683 snd_pcm_pause(substream, 0); 1684 1685 /* pre-start/stop - all running streams are changed to DRAINING state */ 1686 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0); 1687 if (result < 0) 1688 goto unlock; 1689 /* in non-blocking, we don't wait in ioctl but let caller poll */ 1690 if (nonblock) { 1691 result = -EAGAIN; 1692 goto unlock; 1693 } 1694 1695 for (;;) { 1696 long tout; 1697 struct snd_pcm_runtime *to_check; 1698 if (signal_pending(current)) { 1699 result = -ERESTARTSYS; 1700 break; 1701 } 1702 /* find a substream to drain */ 1703 to_check = NULL; 1704 snd_pcm_group_for_each_entry(s, substream) { 1705 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK) 1706 continue; 1707 runtime = s->runtime; 1708 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 1709 to_check = runtime; 1710 break; 1711 } 1712 } 1713 if (!to_check) 1714 break; /* all drained */ 1715 init_waitqueue_entry(&wait, current); 1716 add_wait_queue(&to_check->sleep, &wait); 1717 snd_pcm_stream_unlock_irq(substream); 1718 up_read(&snd_pcm_link_rwsem); 1719 snd_power_unlock(card); 1720 if (runtime->no_period_wakeup) 1721 tout = MAX_SCHEDULE_TIMEOUT; 1722 else { 1723 tout = 10; 1724 if (runtime->rate) { 1725 long t = runtime->period_size * 2 / runtime->rate; 1726 tout = max(t, tout); 1727 } 1728 tout = msecs_to_jiffies(tout * 1000); 1729 } 1730 tout = schedule_timeout_interruptible(tout); 1731 snd_power_lock(card); 1732 down_read(&snd_pcm_link_rwsem); 1733 snd_pcm_stream_lock_irq(substream); 1734 remove_wait_queue(&to_check->sleep, &wait); 1735 if (card->shutdown) { 1736 result = -ENODEV; 1737 break; 1738 } 1739 if (tout == 0) { 1740 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1741 result = -ESTRPIPE; 1742 else { 1743 dev_dbg(substream->pcm->card->dev, 1744 "playback drain error (DMA or IRQ trouble?)\n"); 1745 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1746 result = -EIO; 1747 } 1748 break; 1749 } 1750 } 1751 1752 unlock: 1753 snd_pcm_stream_unlock_irq(substream); 1754 up_read(&snd_pcm_link_rwsem); 1755 snd_power_unlock(card); 1756 1757 return result; 1758 } 1759 1760 /* 1761 * drop ioctl 1762 * 1763 * Immediately put all linked substreams into SETUP state. 1764 */ 1765 static int snd_pcm_drop(struct snd_pcm_substream *substream) 1766 { 1767 struct snd_pcm_runtime *runtime; 1768 int result = 0; 1769 1770 if (PCM_RUNTIME_CHECK(substream)) 1771 return -ENXIO; 1772 runtime = substream->runtime; 1773 1774 if (runtime->status->state == SNDRV_PCM_STATE_OPEN || 1775 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED || 1776 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1777 return -EBADFD; 1778 1779 snd_pcm_stream_lock_irq(substream); 1780 /* resume pause */ 1781 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) 1782 snd_pcm_pause(substream, 0); 1783 1784 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1785 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */ 1786 snd_pcm_stream_unlock_irq(substream); 1787 1788 return result; 1789 } 1790 1791 1792 static bool is_pcm_file(struct file *file) 1793 { 1794 struct inode *inode = file_inode(file); 1795 unsigned int minor; 1796 1797 if (!S_ISCHR(inode->i_mode) || imajor(inode) != snd_major) 1798 return false; 1799 minor = iminor(inode); 1800 return snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) || 1801 snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE); 1802 } 1803 1804 /* 1805 * PCM link handling 1806 */ 1807 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd) 1808 { 1809 int res = 0; 1810 struct snd_pcm_file *pcm_file; 1811 struct snd_pcm_substream *substream1; 1812 struct snd_pcm_group *group; 1813 struct fd f = fdget(fd); 1814 1815 if (!f.file) 1816 return -EBADFD; 1817 if (!is_pcm_file(f.file)) { 1818 res = -EBADFD; 1819 goto _badf; 1820 } 1821 pcm_file = f.file->private_data; 1822 substream1 = pcm_file->substream; 1823 group = kmalloc(sizeof(*group), GFP_KERNEL); 1824 if (!group) { 1825 res = -ENOMEM; 1826 goto _nolock; 1827 } 1828 down_write_nonblock(&snd_pcm_link_rwsem); 1829 write_lock_irq(&snd_pcm_link_rwlock); 1830 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN || 1831 substream->runtime->status->state != substream1->runtime->status->state || 1832 substream->pcm->nonatomic != substream1->pcm->nonatomic) { 1833 res = -EBADFD; 1834 goto _end; 1835 } 1836 if (snd_pcm_stream_linked(substream1)) { 1837 res = -EALREADY; 1838 goto _end; 1839 } 1840 if (!snd_pcm_stream_linked(substream)) { 1841 substream->group = group; 1842 group = NULL; 1843 spin_lock_init(&substream->group->lock); 1844 mutex_init(&substream->group->mutex); 1845 INIT_LIST_HEAD(&substream->group->substreams); 1846 list_add_tail(&substream->link_list, &substream->group->substreams); 1847 substream->group->count = 1; 1848 } 1849 list_add_tail(&substream1->link_list, &substream->group->substreams); 1850 substream->group->count++; 1851 substream1->group = substream->group; 1852 _end: 1853 write_unlock_irq(&snd_pcm_link_rwlock); 1854 up_write(&snd_pcm_link_rwsem); 1855 _nolock: 1856 snd_card_unref(substream1->pcm->card); 1857 kfree(group); 1858 _badf: 1859 fdput(f); 1860 return res; 1861 } 1862 1863 static void relink_to_local(struct snd_pcm_substream *substream) 1864 { 1865 substream->group = &substream->self_group; 1866 INIT_LIST_HEAD(&substream->self_group.substreams); 1867 list_add_tail(&substream->link_list, &substream->self_group.substreams); 1868 } 1869 1870 static int snd_pcm_unlink(struct snd_pcm_substream *substream) 1871 { 1872 struct snd_pcm_substream *s; 1873 int res = 0; 1874 1875 down_write_nonblock(&snd_pcm_link_rwsem); 1876 write_lock_irq(&snd_pcm_link_rwlock); 1877 if (!snd_pcm_stream_linked(substream)) { 1878 res = -EALREADY; 1879 goto _end; 1880 } 1881 list_del(&substream->link_list); 1882 substream->group->count--; 1883 if (substream->group->count == 1) { /* detach the last stream, too */ 1884 snd_pcm_group_for_each_entry(s, substream) { 1885 relink_to_local(s); 1886 break; 1887 } 1888 kfree(substream->group); 1889 } 1890 relink_to_local(substream); 1891 _end: 1892 write_unlock_irq(&snd_pcm_link_rwlock); 1893 up_write(&snd_pcm_link_rwsem); 1894 return res; 1895 } 1896 1897 /* 1898 * hw configurator 1899 */ 1900 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params, 1901 struct snd_pcm_hw_rule *rule) 1902 { 1903 struct snd_interval t; 1904 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]), 1905 hw_param_interval_c(params, rule->deps[1]), &t); 1906 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1907 } 1908 1909 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params, 1910 struct snd_pcm_hw_rule *rule) 1911 { 1912 struct snd_interval t; 1913 snd_interval_div(hw_param_interval_c(params, rule->deps[0]), 1914 hw_param_interval_c(params, rule->deps[1]), &t); 1915 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1916 } 1917 1918 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params, 1919 struct snd_pcm_hw_rule *rule) 1920 { 1921 struct snd_interval t; 1922 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]), 1923 hw_param_interval_c(params, rule->deps[1]), 1924 (unsigned long) rule->private, &t); 1925 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1926 } 1927 1928 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params, 1929 struct snd_pcm_hw_rule *rule) 1930 { 1931 struct snd_interval t; 1932 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]), 1933 (unsigned long) rule->private, 1934 hw_param_interval_c(params, rule->deps[1]), &t); 1935 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1936 } 1937 1938 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params, 1939 struct snd_pcm_hw_rule *rule) 1940 { 1941 unsigned int k; 1942 struct snd_interval *i = hw_param_interval(params, rule->deps[0]); 1943 struct snd_mask m; 1944 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 1945 snd_mask_any(&m); 1946 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { 1947 int bits; 1948 if (! snd_mask_test(mask, k)) 1949 continue; 1950 bits = snd_pcm_format_physical_width(k); 1951 if (bits <= 0) 1952 continue; /* ignore invalid formats */ 1953 if ((unsigned)bits < i->min || (unsigned)bits > i->max) 1954 snd_mask_reset(&m, k); 1955 } 1956 return snd_mask_refine(mask, &m); 1957 } 1958 1959 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params, 1960 struct snd_pcm_hw_rule *rule) 1961 { 1962 struct snd_interval t; 1963 unsigned int k; 1964 t.min = UINT_MAX; 1965 t.max = 0; 1966 t.openmin = 0; 1967 t.openmax = 0; 1968 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { 1969 int bits; 1970 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k)) 1971 continue; 1972 bits = snd_pcm_format_physical_width(k); 1973 if (bits <= 0) 1974 continue; /* ignore invalid formats */ 1975 if (t.min > (unsigned)bits) 1976 t.min = bits; 1977 if (t.max < (unsigned)bits) 1978 t.max = bits; 1979 } 1980 t.integer = 1; 1981 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1982 } 1983 1984 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12 1985 #error "Change this table" 1986 #endif 1987 1988 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100, 1989 48000, 64000, 88200, 96000, 176400, 192000 }; 1990 1991 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = { 1992 .count = ARRAY_SIZE(rates), 1993 .list = rates, 1994 }; 1995 1996 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params, 1997 struct snd_pcm_hw_rule *rule) 1998 { 1999 struct snd_pcm_hardware *hw = rule->private; 2000 return snd_interval_list(hw_param_interval(params, rule->var), 2001 snd_pcm_known_rates.count, 2002 snd_pcm_known_rates.list, hw->rates); 2003 } 2004 2005 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params, 2006 struct snd_pcm_hw_rule *rule) 2007 { 2008 struct snd_interval t; 2009 struct snd_pcm_substream *substream = rule->private; 2010 t.min = 0; 2011 t.max = substream->buffer_bytes_max; 2012 t.openmin = 0; 2013 t.openmax = 0; 2014 t.integer = 1; 2015 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 2016 } 2017 2018 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream) 2019 { 2020 struct snd_pcm_runtime *runtime = substream->runtime; 2021 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; 2022 int k, err; 2023 2024 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { 2025 snd_mask_any(constrs_mask(constrs, k)); 2026 } 2027 2028 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { 2029 snd_interval_any(constrs_interval(constrs, k)); 2030 } 2031 2032 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS)); 2033 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)); 2034 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)); 2035 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)); 2036 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS)); 2037 2038 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, 2039 snd_pcm_hw_rule_format, NULL, 2040 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 2041 if (err < 0) 2042 return err; 2043 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 2044 snd_pcm_hw_rule_sample_bits, NULL, 2045 SNDRV_PCM_HW_PARAM_FORMAT, 2046 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 2047 if (err < 0) 2048 return err; 2049 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 2050 snd_pcm_hw_rule_div, NULL, 2051 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); 2052 if (err < 0) 2053 return err; 2054 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 2055 snd_pcm_hw_rule_mul, NULL, 2056 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); 2057 if (err < 0) 2058 return err; 2059 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 2060 snd_pcm_hw_rule_mulkdiv, (void*) 8, 2061 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 2062 if (err < 0) 2063 return err; 2064 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 2065 snd_pcm_hw_rule_mulkdiv, (void*) 8, 2066 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1); 2067 if (err < 0) 2068 return err; 2069 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 2070 snd_pcm_hw_rule_div, NULL, 2071 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 2072 if (err < 0) 2073 return err; 2074 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 2075 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 2076 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1); 2077 if (err < 0) 2078 return err; 2079 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 2080 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 2081 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1); 2082 if (err < 0) 2083 return err; 2084 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, 2085 snd_pcm_hw_rule_div, NULL, 2086 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 2087 if (err < 0) 2088 return err; 2089 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 2090 snd_pcm_hw_rule_div, NULL, 2091 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); 2092 if (err < 0) 2093 return err; 2094 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 2095 snd_pcm_hw_rule_mulkdiv, (void*) 8, 2096 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 2097 if (err < 0) 2098 return err; 2099 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 2100 snd_pcm_hw_rule_muldivk, (void*) 1000000, 2101 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); 2102 if (err < 0) 2103 return err; 2104 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 2105 snd_pcm_hw_rule_mul, NULL, 2106 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); 2107 if (err < 0) 2108 return err; 2109 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 2110 snd_pcm_hw_rule_mulkdiv, (void*) 8, 2111 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 2112 if (err < 0) 2113 return err; 2114 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 2115 snd_pcm_hw_rule_muldivk, (void*) 1000000, 2116 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); 2117 if (err < 0) 2118 return err; 2119 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 2120 snd_pcm_hw_rule_muldivk, (void*) 8, 2121 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 2122 if (err < 0) 2123 return err; 2124 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 2125 snd_pcm_hw_rule_muldivk, (void*) 8, 2126 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 2127 if (err < 0) 2128 return err; 2129 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 2130 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 2131 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); 2132 if (err < 0) 2133 return err; 2134 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME, 2135 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 2136 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); 2137 if (err < 0) 2138 return err; 2139 return 0; 2140 } 2141 2142 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream) 2143 { 2144 struct snd_pcm_runtime *runtime = substream->runtime; 2145 struct snd_pcm_hardware *hw = &runtime->hw; 2146 int err; 2147 unsigned int mask = 0; 2148 2149 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) 2150 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED; 2151 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) 2152 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED; 2153 if (hw_support_mmap(substream)) { 2154 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) 2155 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; 2156 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) 2157 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED; 2158 if (hw->info & SNDRV_PCM_INFO_COMPLEX) 2159 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX; 2160 } 2161 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask); 2162 if (err < 0) 2163 return err; 2164 2165 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats); 2166 if (err < 0) 2167 return err; 2168 2169 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD); 2170 if (err < 0) 2171 return err; 2172 2173 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, 2174 hw->channels_min, hw->channels_max); 2175 if (err < 0) 2176 return err; 2177 2178 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE, 2179 hw->rate_min, hw->rate_max); 2180 if (err < 0) 2181 return err; 2182 2183 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 2184 hw->period_bytes_min, hw->period_bytes_max); 2185 if (err < 0) 2186 return err; 2187 2188 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS, 2189 hw->periods_min, hw->periods_max); 2190 if (err < 0) 2191 return err; 2192 2193 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 2194 hw->period_bytes_min, hw->buffer_bytes_max); 2195 if (err < 0) 2196 return err; 2197 2198 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 2199 snd_pcm_hw_rule_buffer_bytes_max, substream, 2200 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1); 2201 if (err < 0) 2202 return err; 2203 2204 /* FIXME: remove */ 2205 if (runtime->dma_bytes) { 2206 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes); 2207 if (err < 0) 2208 return err; 2209 } 2210 2211 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) { 2212 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 2213 snd_pcm_hw_rule_rate, hw, 2214 SNDRV_PCM_HW_PARAM_RATE, -1); 2215 if (err < 0) 2216 return err; 2217 } 2218 2219 /* FIXME: this belong to lowlevel */ 2220 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE); 2221 2222 return 0; 2223 } 2224 2225 static void pcm_release_private(struct snd_pcm_substream *substream) 2226 { 2227 snd_pcm_unlink(substream); 2228 } 2229 2230 void snd_pcm_release_substream(struct snd_pcm_substream *substream) 2231 { 2232 substream->ref_count--; 2233 if (substream->ref_count > 0) 2234 return; 2235 2236 snd_pcm_drop(substream); 2237 if (substream->hw_opened) { 2238 if (substream->ops->hw_free && 2239 substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) 2240 substream->ops->hw_free(substream); 2241 substream->ops->close(substream); 2242 substream->hw_opened = 0; 2243 } 2244 if (pm_qos_request_active(&substream->latency_pm_qos_req)) 2245 pm_qos_remove_request(&substream->latency_pm_qos_req); 2246 if (substream->pcm_release) { 2247 substream->pcm_release(substream); 2248 substream->pcm_release = NULL; 2249 } 2250 snd_pcm_detach_substream(substream); 2251 } 2252 2253 EXPORT_SYMBOL(snd_pcm_release_substream); 2254 2255 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, 2256 struct file *file, 2257 struct snd_pcm_substream **rsubstream) 2258 { 2259 struct snd_pcm_substream *substream; 2260 int err; 2261 2262 err = snd_pcm_attach_substream(pcm, stream, file, &substream); 2263 if (err < 0) 2264 return err; 2265 if (substream->ref_count > 1) { 2266 *rsubstream = substream; 2267 return 0; 2268 } 2269 2270 err = snd_pcm_hw_constraints_init(substream); 2271 if (err < 0) { 2272 pcm_dbg(pcm, "snd_pcm_hw_constraints_init failed\n"); 2273 goto error; 2274 } 2275 2276 if ((err = substream->ops->open(substream)) < 0) 2277 goto error; 2278 2279 substream->hw_opened = 1; 2280 2281 err = snd_pcm_hw_constraints_complete(substream); 2282 if (err < 0) { 2283 pcm_dbg(pcm, "snd_pcm_hw_constraints_complete failed\n"); 2284 goto error; 2285 } 2286 2287 *rsubstream = substream; 2288 return 0; 2289 2290 error: 2291 snd_pcm_release_substream(substream); 2292 return err; 2293 } 2294 2295 EXPORT_SYMBOL(snd_pcm_open_substream); 2296 2297 static int snd_pcm_open_file(struct file *file, 2298 struct snd_pcm *pcm, 2299 int stream) 2300 { 2301 struct snd_pcm_file *pcm_file; 2302 struct snd_pcm_substream *substream; 2303 int err; 2304 2305 err = snd_pcm_open_substream(pcm, stream, file, &substream); 2306 if (err < 0) 2307 return err; 2308 2309 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL); 2310 if (pcm_file == NULL) { 2311 snd_pcm_release_substream(substream); 2312 return -ENOMEM; 2313 } 2314 pcm_file->substream = substream; 2315 if (substream->ref_count == 1) { 2316 substream->file = pcm_file; 2317 substream->pcm_release = pcm_release_private; 2318 } 2319 file->private_data = pcm_file; 2320 2321 return 0; 2322 } 2323 2324 static int snd_pcm_playback_open(struct inode *inode, struct file *file) 2325 { 2326 struct snd_pcm *pcm; 2327 int err = nonseekable_open(inode, file); 2328 if (err < 0) 2329 return err; 2330 pcm = snd_lookup_minor_data(iminor(inode), 2331 SNDRV_DEVICE_TYPE_PCM_PLAYBACK); 2332 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK); 2333 if (pcm) 2334 snd_card_unref(pcm->card); 2335 return err; 2336 } 2337 2338 static int snd_pcm_capture_open(struct inode *inode, struct file *file) 2339 { 2340 struct snd_pcm *pcm; 2341 int err = nonseekable_open(inode, file); 2342 if (err < 0) 2343 return err; 2344 pcm = snd_lookup_minor_data(iminor(inode), 2345 SNDRV_DEVICE_TYPE_PCM_CAPTURE); 2346 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE); 2347 if (pcm) 2348 snd_card_unref(pcm->card); 2349 return err; 2350 } 2351 2352 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream) 2353 { 2354 int err; 2355 wait_queue_t wait; 2356 2357 if (pcm == NULL) { 2358 err = -ENODEV; 2359 goto __error1; 2360 } 2361 err = snd_card_file_add(pcm->card, file); 2362 if (err < 0) 2363 goto __error1; 2364 if (!try_module_get(pcm->card->module)) { 2365 err = -EFAULT; 2366 goto __error2; 2367 } 2368 init_waitqueue_entry(&wait, current); 2369 add_wait_queue(&pcm->open_wait, &wait); 2370 mutex_lock(&pcm->open_mutex); 2371 while (1) { 2372 err = snd_pcm_open_file(file, pcm, stream); 2373 if (err >= 0) 2374 break; 2375 if (err == -EAGAIN) { 2376 if (file->f_flags & O_NONBLOCK) { 2377 err = -EBUSY; 2378 break; 2379 } 2380 } else 2381 break; 2382 set_current_state(TASK_INTERRUPTIBLE); 2383 mutex_unlock(&pcm->open_mutex); 2384 schedule(); 2385 mutex_lock(&pcm->open_mutex); 2386 if (pcm->card->shutdown) { 2387 err = -ENODEV; 2388 break; 2389 } 2390 if (signal_pending(current)) { 2391 err = -ERESTARTSYS; 2392 break; 2393 } 2394 } 2395 remove_wait_queue(&pcm->open_wait, &wait); 2396 mutex_unlock(&pcm->open_mutex); 2397 if (err < 0) 2398 goto __error; 2399 return err; 2400 2401 __error: 2402 module_put(pcm->card->module); 2403 __error2: 2404 snd_card_file_remove(pcm->card, file); 2405 __error1: 2406 return err; 2407 } 2408 2409 static int snd_pcm_release(struct inode *inode, struct file *file) 2410 { 2411 struct snd_pcm *pcm; 2412 struct snd_pcm_substream *substream; 2413 struct snd_pcm_file *pcm_file; 2414 2415 pcm_file = file->private_data; 2416 substream = pcm_file->substream; 2417 if (snd_BUG_ON(!substream)) 2418 return -ENXIO; 2419 pcm = substream->pcm; 2420 mutex_lock(&pcm->open_mutex); 2421 snd_pcm_release_substream(substream); 2422 kfree(pcm_file); 2423 mutex_unlock(&pcm->open_mutex); 2424 wake_up(&pcm->open_wait); 2425 module_put(pcm->card->module); 2426 snd_card_file_remove(pcm->card, file); 2427 return 0; 2428 } 2429 2430 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream, 2431 snd_pcm_uframes_t frames) 2432 { 2433 struct snd_pcm_runtime *runtime = substream->runtime; 2434 snd_pcm_sframes_t appl_ptr; 2435 snd_pcm_sframes_t ret; 2436 snd_pcm_sframes_t hw_avail; 2437 2438 if (frames == 0) 2439 return 0; 2440 2441 snd_pcm_stream_lock_irq(substream); 2442 switch (runtime->status->state) { 2443 case SNDRV_PCM_STATE_PREPARED: 2444 break; 2445 case SNDRV_PCM_STATE_DRAINING: 2446 case SNDRV_PCM_STATE_RUNNING: 2447 if (snd_pcm_update_hw_ptr(substream) >= 0) 2448 break; 2449 /* Fall through */ 2450 case SNDRV_PCM_STATE_XRUN: 2451 ret = -EPIPE; 2452 goto __end; 2453 case SNDRV_PCM_STATE_SUSPENDED: 2454 ret = -ESTRPIPE; 2455 goto __end; 2456 default: 2457 ret = -EBADFD; 2458 goto __end; 2459 } 2460 2461 hw_avail = snd_pcm_playback_hw_avail(runtime); 2462 if (hw_avail <= 0) { 2463 ret = 0; 2464 goto __end; 2465 } 2466 if (frames > (snd_pcm_uframes_t)hw_avail) 2467 frames = hw_avail; 2468 appl_ptr = runtime->control->appl_ptr - frames; 2469 if (appl_ptr < 0) 2470 appl_ptr += runtime->boundary; 2471 runtime->control->appl_ptr = appl_ptr; 2472 ret = frames; 2473 __end: 2474 snd_pcm_stream_unlock_irq(substream); 2475 return ret; 2476 } 2477 2478 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream, 2479 snd_pcm_uframes_t frames) 2480 { 2481 struct snd_pcm_runtime *runtime = substream->runtime; 2482 snd_pcm_sframes_t appl_ptr; 2483 snd_pcm_sframes_t ret; 2484 snd_pcm_sframes_t hw_avail; 2485 2486 if (frames == 0) 2487 return 0; 2488 2489 snd_pcm_stream_lock_irq(substream); 2490 switch (runtime->status->state) { 2491 case SNDRV_PCM_STATE_PREPARED: 2492 case SNDRV_PCM_STATE_DRAINING: 2493 break; 2494 case SNDRV_PCM_STATE_RUNNING: 2495 if (snd_pcm_update_hw_ptr(substream) >= 0) 2496 break; 2497 /* Fall through */ 2498 case SNDRV_PCM_STATE_XRUN: 2499 ret = -EPIPE; 2500 goto __end; 2501 case SNDRV_PCM_STATE_SUSPENDED: 2502 ret = -ESTRPIPE; 2503 goto __end; 2504 default: 2505 ret = -EBADFD; 2506 goto __end; 2507 } 2508 2509 hw_avail = snd_pcm_capture_hw_avail(runtime); 2510 if (hw_avail <= 0) { 2511 ret = 0; 2512 goto __end; 2513 } 2514 if (frames > (snd_pcm_uframes_t)hw_avail) 2515 frames = hw_avail; 2516 appl_ptr = runtime->control->appl_ptr - frames; 2517 if (appl_ptr < 0) 2518 appl_ptr += runtime->boundary; 2519 runtime->control->appl_ptr = appl_ptr; 2520 ret = frames; 2521 __end: 2522 snd_pcm_stream_unlock_irq(substream); 2523 return ret; 2524 } 2525 2526 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream, 2527 snd_pcm_uframes_t frames) 2528 { 2529 struct snd_pcm_runtime *runtime = substream->runtime; 2530 snd_pcm_sframes_t appl_ptr; 2531 snd_pcm_sframes_t ret; 2532 snd_pcm_sframes_t avail; 2533 2534 if (frames == 0) 2535 return 0; 2536 2537 snd_pcm_stream_lock_irq(substream); 2538 switch (runtime->status->state) { 2539 case SNDRV_PCM_STATE_PREPARED: 2540 case SNDRV_PCM_STATE_PAUSED: 2541 break; 2542 case SNDRV_PCM_STATE_DRAINING: 2543 case SNDRV_PCM_STATE_RUNNING: 2544 if (snd_pcm_update_hw_ptr(substream) >= 0) 2545 break; 2546 /* Fall through */ 2547 case SNDRV_PCM_STATE_XRUN: 2548 ret = -EPIPE; 2549 goto __end; 2550 case SNDRV_PCM_STATE_SUSPENDED: 2551 ret = -ESTRPIPE; 2552 goto __end; 2553 default: 2554 ret = -EBADFD; 2555 goto __end; 2556 } 2557 2558 avail = snd_pcm_playback_avail(runtime); 2559 if (avail <= 0) { 2560 ret = 0; 2561 goto __end; 2562 } 2563 if (frames > (snd_pcm_uframes_t)avail) 2564 frames = avail; 2565 appl_ptr = runtime->control->appl_ptr + frames; 2566 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) 2567 appl_ptr -= runtime->boundary; 2568 runtime->control->appl_ptr = appl_ptr; 2569 ret = frames; 2570 __end: 2571 snd_pcm_stream_unlock_irq(substream); 2572 return ret; 2573 } 2574 2575 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream, 2576 snd_pcm_uframes_t frames) 2577 { 2578 struct snd_pcm_runtime *runtime = substream->runtime; 2579 snd_pcm_sframes_t appl_ptr; 2580 snd_pcm_sframes_t ret; 2581 snd_pcm_sframes_t avail; 2582 2583 if (frames == 0) 2584 return 0; 2585 2586 snd_pcm_stream_lock_irq(substream); 2587 switch (runtime->status->state) { 2588 case SNDRV_PCM_STATE_PREPARED: 2589 case SNDRV_PCM_STATE_DRAINING: 2590 case SNDRV_PCM_STATE_PAUSED: 2591 break; 2592 case SNDRV_PCM_STATE_RUNNING: 2593 if (snd_pcm_update_hw_ptr(substream) >= 0) 2594 break; 2595 /* Fall through */ 2596 case SNDRV_PCM_STATE_XRUN: 2597 ret = -EPIPE; 2598 goto __end; 2599 case SNDRV_PCM_STATE_SUSPENDED: 2600 ret = -ESTRPIPE; 2601 goto __end; 2602 default: 2603 ret = -EBADFD; 2604 goto __end; 2605 } 2606 2607 avail = snd_pcm_capture_avail(runtime); 2608 if (avail <= 0) { 2609 ret = 0; 2610 goto __end; 2611 } 2612 if (frames > (snd_pcm_uframes_t)avail) 2613 frames = avail; 2614 appl_ptr = runtime->control->appl_ptr + frames; 2615 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) 2616 appl_ptr -= runtime->boundary; 2617 runtime->control->appl_ptr = appl_ptr; 2618 ret = frames; 2619 __end: 2620 snd_pcm_stream_unlock_irq(substream); 2621 return ret; 2622 } 2623 2624 static int snd_pcm_hwsync(struct snd_pcm_substream *substream) 2625 { 2626 struct snd_pcm_runtime *runtime = substream->runtime; 2627 int err; 2628 2629 snd_pcm_stream_lock_irq(substream); 2630 switch (runtime->status->state) { 2631 case SNDRV_PCM_STATE_DRAINING: 2632 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 2633 goto __badfd; 2634 /* Fall through */ 2635 case SNDRV_PCM_STATE_RUNNING: 2636 if ((err = snd_pcm_update_hw_ptr(substream)) < 0) 2637 break; 2638 /* Fall through */ 2639 case SNDRV_PCM_STATE_PREPARED: 2640 case SNDRV_PCM_STATE_SUSPENDED: 2641 err = 0; 2642 break; 2643 case SNDRV_PCM_STATE_XRUN: 2644 err = -EPIPE; 2645 break; 2646 default: 2647 __badfd: 2648 err = -EBADFD; 2649 break; 2650 } 2651 snd_pcm_stream_unlock_irq(substream); 2652 return err; 2653 } 2654 2655 static int snd_pcm_delay(struct snd_pcm_substream *substream, 2656 snd_pcm_sframes_t __user *res) 2657 { 2658 struct snd_pcm_runtime *runtime = substream->runtime; 2659 int err; 2660 snd_pcm_sframes_t n = 0; 2661 2662 snd_pcm_stream_lock_irq(substream); 2663 switch (runtime->status->state) { 2664 case SNDRV_PCM_STATE_DRAINING: 2665 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 2666 goto __badfd; 2667 /* Fall through */ 2668 case SNDRV_PCM_STATE_RUNNING: 2669 if ((err = snd_pcm_update_hw_ptr(substream)) < 0) 2670 break; 2671 /* Fall through */ 2672 case SNDRV_PCM_STATE_PREPARED: 2673 case SNDRV_PCM_STATE_SUSPENDED: 2674 err = 0; 2675 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2676 n = snd_pcm_playback_hw_avail(runtime); 2677 else 2678 n = snd_pcm_capture_avail(runtime); 2679 n += runtime->delay; 2680 break; 2681 case SNDRV_PCM_STATE_XRUN: 2682 err = -EPIPE; 2683 break; 2684 default: 2685 __badfd: 2686 err = -EBADFD; 2687 break; 2688 } 2689 snd_pcm_stream_unlock_irq(substream); 2690 if (!err) 2691 if (put_user(n, res)) 2692 err = -EFAULT; 2693 return err; 2694 } 2695 2696 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream, 2697 struct snd_pcm_sync_ptr __user *_sync_ptr) 2698 { 2699 struct snd_pcm_runtime *runtime = substream->runtime; 2700 struct snd_pcm_sync_ptr sync_ptr; 2701 volatile struct snd_pcm_mmap_status *status; 2702 volatile struct snd_pcm_mmap_control *control; 2703 int err; 2704 2705 memset(&sync_ptr, 0, sizeof(sync_ptr)); 2706 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags))) 2707 return -EFAULT; 2708 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control))) 2709 return -EFAULT; 2710 status = runtime->status; 2711 control = runtime->control; 2712 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) { 2713 err = snd_pcm_hwsync(substream); 2714 if (err < 0) 2715 return err; 2716 } 2717 snd_pcm_stream_lock_irq(substream); 2718 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) 2719 control->appl_ptr = sync_ptr.c.control.appl_ptr; 2720 else 2721 sync_ptr.c.control.appl_ptr = control->appl_ptr; 2722 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) 2723 control->avail_min = sync_ptr.c.control.avail_min; 2724 else 2725 sync_ptr.c.control.avail_min = control->avail_min; 2726 sync_ptr.s.status.state = status->state; 2727 sync_ptr.s.status.hw_ptr = status->hw_ptr; 2728 sync_ptr.s.status.tstamp = status->tstamp; 2729 sync_ptr.s.status.suspended_state = status->suspended_state; 2730 snd_pcm_stream_unlock_irq(substream); 2731 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr))) 2732 return -EFAULT; 2733 return 0; 2734 } 2735 2736 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg) 2737 { 2738 struct snd_pcm_runtime *runtime = substream->runtime; 2739 int arg; 2740 2741 if (get_user(arg, _arg)) 2742 return -EFAULT; 2743 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST) 2744 return -EINVAL; 2745 runtime->tstamp_type = arg; 2746 return 0; 2747 } 2748 2749 static int snd_pcm_common_ioctl1(struct file *file, 2750 struct snd_pcm_substream *substream, 2751 unsigned int cmd, void __user *arg) 2752 { 2753 switch (cmd) { 2754 case SNDRV_PCM_IOCTL_PVERSION: 2755 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0; 2756 case SNDRV_PCM_IOCTL_INFO: 2757 return snd_pcm_info_user(substream, arg); 2758 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */ 2759 return 0; 2760 case SNDRV_PCM_IOCTL_TTSTAMP: 2761 return snd_pcm_tstamp(substream, arg); 2762 case SNDRV_PCM_IOCTL_HW_REFINE: 2763 return snd_pcm_hw_refine_user(substream, arg); 2764 case SNDRV_PCM_IOCTL_HW_PARAMS: 2765 return snd_pcm_hw_params_user(substream, arg); 2766 case SNDRV_PCM_IOCTL_HW_FREE: 2767 return snd_pcm_hw_free(substream); 2768 case SNDRV_PCM_IOCTL_SW_PARAMS: 2769 return snd_pcm_sw_params_user(substream, arg); 2770 case SNDRV_PCM_IOCTL_STATUS: 2771 return snd_pcm_status_user(substream, arg, false); 2772 case SNDRV_PCM_IOCTL_STATUS_EXT: 2773 return snd_pcm_status_user(substream, arg, true); 2774 case SNDRV_PCM_IOCTL_CHANNEL_INFO: 2775 return snd_pcm_channel_info_user(substream, arg); 2776 case SNDRV_PCM_IOCTL_PREPARE: 2777 return snd_pcm_prepare(substream, file); 2778 case SNDRV_PCM_IOCTL_RESET: 2779 return snd_pcm_reset(substream); 2780 case SNDRV_PCM_IOCTL_START: 2781 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING); 2782 case SNDRV_PCM_IOCTL_LINK: 2783 return snd_pcm_link(substream, (int)(unsigned long) arg); 2784 case SNDRV_PCM_IOCTL_UNLINK: 2785 return snd_pcm_unlink(substream); 2786 case SNDRV_PCM_IOCTL_RESUME: 2787 return snd_pcm_resume(substream); 2788 case SNDRV_PCM_IOCTL_XRUN: 2789 return snd_pcm_xrun(substream); 2790 case SNDRV_PCM_IOCTL_HWSYNC: 2791 return snd_pcm_hwsync(substream); 2792 case SNDRV_PCM_IOCTL_DELAY: 2793 return snd_pcm_delay(substream, arg); 2794 case SNDRV_PCM_IOCTL_SYNC_PTR: 2795 return snd_pcm_sync_ptr(substream, arg); 2796 #ifdef CONFIG_SND_SUPPORT_OLD_API 2797 case SNDRV_PCM_IOCTL_HW_REFINE_OLD: 2798 return snd_pcm_hw_refine_old_user(substream, arg); 2799 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD: 2800 return snd_pcm_hw_params_old_user(substream, arg); 2801 #endif 2802 case SNDRV_PCM_IOCTL_DRAIN: 2803 return snd_pcm_drain(substream, file); 2804 case SNDRV_PCM_IOCTL_DROP: 2805 return snd_pcm_drop(substream); 2806 case SNDRV_PCM_IOCTL_PAUSE: 2807 { 2808 int res; 2809 snd_pcm_stream_lock_irq(substream); 2810 res = snd_pcm_pause(substream, (int)(unsigned long)arg); 2811 snd_pcm_stream_unlock_irq(substream); 2812 return res; 2813 } 2814 } 2815 pcm_dbg(substream->pcm, "unknown ioctl = 0x%x\n", cmd); 2816 return -ENOTTY; 2817 } 2818 2819 static int snd_pcm_playback_ioctl1(struct file *file, 2820 struct snd_pcm_substream *substream, 2821 unsigned int cmd, void __user *arg) 2822 { 2823 if (snd_BUG_ON(!substream)) 2824 return -ENXIO; 2825 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) 2826 return -EINVAL; 2827 switch (cmd) { 2828 case SNDRV_PCM_IOCTL_WRITEI_FRAMES: 2829 { 2830 struct snd_xferi xferi; 2831 struct snd_xferi __user *_xferi = arg; 2832 struct snd_pcm_runtime *runtime = substream->runtime; 2833 snd_pcm_sframes_t result; 2834 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2835 return -EBADFD; 2836 if (put_user(0, &_xferi->result)) 2837 return -EFAULT; 2838 if (copy_from_user(&xferi, _xferi, sizeof(xferi))) 2839 return -EFAULT; 2840 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames); 2841 __put_user(result, &_xferi->result); 2842 return result < 0 ? result : 0; 2843 } 2844 case SNDRV_PCM_IOCTL_WRITEN_FRAMES: 2845 { 2846 struct snd_xfern xfern; 2847 struct snd_xfern __user *_xfern = arg; 2848 struct snd_pcm_runtime *runtime = substream->runtime; 2849 void __user **bufs; 2850 snd_pcm_sframes_t result; 2851 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2852 return -EBADFD; 2853 if (runtime->channels > 128) 2854 return -EINVAL; 2855 if (put_user(0, &_xfern->result)) 2856 return -EFAULT; 2857 if (copy_from_user(&xfern, _xfern, sizeof(xfern))) 2858 return -EFAULT; 2859 2860 bufs = memdup_user(xfern.bufs, 2861 sizeof(void *) * runtime->channels); 2862 if (IS_ERR(bufs)) 2863 return PTR_ERR(bufs); 2864 result = snd_pcm_lib_writev(substream, bufs, xfern.frames); 2865 kfree(bufs); 2866 __put_user(result, &_xfern->result); 2867 return result < 0 ? result : 0; 2868 } 2869 case SNDRV_PCM_IOCTL_REWIND: 2870 { 2871 snd_pcm_uframes_t frames; 2872 snd_pcm_uframes_t __user *_frames = arg; 2873 snd_pcm_sframes_t result; 2874 if (get_user(frames, _frames)) 2875 return -EFAULT; 2876 if (put_user(0, _frames)) 2877 return -EFAULT; 2878 result = snd_pcm_playback_rewind(substream, frames); 2879 __put_user(result, _frames); 2880 return result < 0 ? result : 0; 2881 } 2882 case SNDRV_PCM_IOCTL_FORWARD: 2883 { 2884 snd_pcm_uframes_t frames; 2885 snd_pcm_uframes_t __user *_frames = arg; 2886 snd_pcm_sframes_t result; 2887 if (get_user(frames, _frames)) 2888 return -EFAULT; 2889 if (put_user(0, _frames)) 2890 return -EFAULT; 2891 result = snd_pcm_playback_forward(substream, frames); 2892 __put_user(result, _frames); 2893 return result < 0 ? result : 0; 2894 } 2895 } 2896 return snd_pcm_common_ioctl1(file, substream, cmd, arg); 2897 } 2898 2899 static int snd_pcm_capture_ioctl1(struct file *file, 2900 struct snd_pcm_substream *substream, 2901 unsigned int cmd, void __user *arg) 2902 { 2903 if (snd_BUG_ON(!substream)) 2904 return -ENXIO; 2905 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE)) 2906 return -EINVAL; 2907 switch (cmd) { 2908 case SNDRV_PCM_IOCTL_READI_FRAMES: 2909 { 2910 struct snd_xferi xferi; 2911 struct snd_xferi __user *_xferi = arg; 2912 struct snd_pcm_runtime *runtime = substream->runtime; 2913 snd_pcm_sframes_t result; 2914 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2915 return -EBADFD; 2916 if (put_user(0, &_xferi->result)) 2917 return -EFAULT; 2918 if (copy_from_user(&xferi, _xferi, sizeof(xferi))) 2919 return -EFAULT; 2920 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames); 2921 __put_user(result, &_xferi->result); 2922 return result < 0 ? result : 0; 2923 } 2924 case SNDRV_PCM_IOCTL_READN_FRAMES: 2925 { 2926 struct snd_xfern xfern; 2927 struct snd_xfern __user *_xfern = arg; 2928 struct snd_pcm_runtime *runtime = substream->runtime; 2929 void *bufs; 2930 snd_pcm_sframes_t result; 2931 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2932 return -EBADFD; 2933 if (runtime->channels > 128) 2934 return -EINVAL; 2935 if (put_user(0, &_xfern->result)) 2936 return -EFAULT; 2937 if (copy_from_user(&xfern, _xfern, sizeof(xfern))) 2938 return -EFAULT; 2939 2940 bufs = memdup_user(xfern.bufs, 2941 sizeof(void *) * runtime->channels); 2942 if (IS_ERR(bufs)) 2943 return PTR_ERR(bufs); 2944 result = snd_pcm_lib_readv(substream, bufs, xfern.frames); 2945 kfree(bufs); 2946 __put_user(result, &_xfern->result); 2947 return result < 0 ? result : 0; 2948 } 2949 case SNDRV_PCM_IOCTL_REWIND: 2950 { 2951 snd_pcm_uframes_t frames; 2952 snd_pcm_uframes_t __user *_frames = arg; 2953 snd_pcm_sframes_t result; 2954 if (get_user(frames, _frames)) 2955 return -EFAULT; 2956 if (put_user(0, _frames)) 2957 return -EFAULT; 2958 result = snd_pcm_capture_rewind(substream, frames); 2959 __put_user(result, _frames); 2960 return result < 0 ? result : 0; 2961 } 2962 case SNDRV_PCM_IOCTL_FORWARD: 2963 { 2964 snd_pcm_uframes_t frames; 2965 snd_pcm_uframes_t __user *_frames = arg; 2966 snd_pcm_sframes_t result; 2967 if (get_user(frames, _frames)) 2968 return -EFAULT; 2969 if (put_user(0, _frames)) 2970 return -EFAULT; 2971 result = snd_pcm_capture_forward(substream, frames); 2972 __put_user(result, _frames); 2973 return result < 0 ? result : 0; 2974 } 2975 } 2976 return snd_pcm_common_ioctl1(file, substream, cmd, arg); 2977 } 2978 2979 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd, 2980 unsigned long arg) 2981 { 2982 struct snd_pcm_file *pcm_file; 2983 2984 pcm_file = file->private_data; 2985 2986 if (((cmd >> 8) & 0xff) != 'A') 2987 return -ENOTTY; 2988 2989 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd, 2990 (void __user *)arg); 2991 } 2992 2993 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd, 2994 unsigned long arg) 2995 { 2996 struct snd_pcm_file *pcm_file; 2997 2998 pcm_file = file->private_data; 2999 3000 if (((cmd >> 8) & 0xff) != 'A') 3001 return -ENOTTY; 3002 3003 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd, 3004 (void __user *)arg); 3005 } 3006 3007 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, 3008 unsigned int cmd, void *arg) 3009 { 3010 mm_segment_t fs; 3011 int result; 3012 3013 fs = snd_enter_user(); 3014 switch (substream->stream) { 3015 case SNDRV_PCM_STREAM_PLAYBACK: 3016 result = snd_pcm_playback_ioctl1(NULL, substream, cmd, 3017 (void __user *)arg); 3018 break; 3019 case SNDRV_PCM_STREAM_CAPTURE: 3020 result = snd_pcm_capture_ioctl1(NULL, substream, cmd, 3021 (void __user *)arg); 3022 break; 3023 default: 3024 result = -EINVAL; 3025 break; 3026 } 3027 snd_leave_user(fs); 3028 return result; 3029 } 3030 3031 EXPORT_SYMBOL(snd_pcm_kernel_ioctl); 3032 3033 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count, 3034 loff_t * offset) 3035 { 3036 struct snd_pcm_file *pcm_file; 3037 struct snd_pcm_substream *substream; 3038 struct snd_pcm_runtime *runtime; 3039 snd_pcm_sframes_t result; 3040 3041 pcm_file = file->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 (!frame_aligned(runtime, count)) 3049 return -EINVAL; 3050 count = bytes_to_frames(runtime, count); 3051 result = snd_pcm_lib_read(substream, buf, count); 3052 if (result > 0) 3053 result = frames_to_bytes(runtime, result); 3054 return result; 3055 } 3056 3057 static ssize_t snd_pcm_write(struct file *file, const char __user *buf, 3058 size_t count, loff_t * offset) 3059 { 3060 struct snd_pcm_file *pcm_file; 3061 struct snd_pcm_substream *substream; 3062 struct snd_pcm_runtime *runtime; 3063 snd_pcm_sframes_t result; 3064 3065 pcm_file = file->private_data; 3066 substream = pcm_file->substream; 3067 if (PCM_RUNTIME_CHECK(substream)) 3068 return -ENXIO; 3069 runtime = substream->runtime; 3070 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 3071 return -EBADFD; 3072 if (!frame_aligned(runtime, count)) 3073 return -EINVAL; 3074 count = bytes_to_frames(runtime, count); 3075 result = snd_pcm_lib_write(substream, buf, count); 3076 if (result > 0) 3077 result = frames_to_bytes(runtime, result); 3078 return result; 3079 } 3080 3081 static ssize_t snd_pcm_readv(struct kiocb *iocb, struct iov_iter *to) 3082 { 3083 struct snd_pcm_file *pcm_file; 3084 struct snd_pcm_substream *substream; 3085 struct snd_pcm_runtime *runtime; 3086 snd_pcm_sframes_t result; 3087 unsigned long i; 3088 void __user **bufs; 3089 snd_pcm_uframes_t frames; 3090 3091 pcm_file = iocb->ki_filp->private_data; 3092 substream = pcm_file->substream; 3093 if (PCM_RUNTIME_CHECK(substream)) 3094 return -ENXIO; 3095 runtime = substream->runtime; 3096 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 3097 return -EBADFD; 3098 if (!iter_is_iovec(to)) 3099 return -EINVAL; 3100 if (to->nr_segs > 1024 || to->nr_segs != runtime->channels) 3101 return -EINVAL; 3102 if (!frame_aligned(runtime, to->iov->iov_len)) 3103 return -EINVAL; 3104 frames = bytes_to_samples(runtime, to->iov->iov_len); 3105 bufs = kmalloc(sizeof(void *) * to->nr_segs, GFP_KERNEL); 3106 if (bufs == NULL) 3107 return -ENOMEM; 3108 for (i = 0; i < to->nr_segs; ++i) 3109 bufs[i] = to->iov[i].iov_base; 3110 result = snd_pcm_lib_readv(substream, bufs, frames); 3111 if (result > 0) 3112 result = frames_to_bytes(runtime, result); 3113 kfree(bufs); 3114 return result; 3115 } 3116 3117 static ssize_t snd_pcm_writev(struct kiocb *iocb, struct iov_iter *from) 3118 { 3119 struct snd_pcm_file *pcm_file; 3120 struct snd_pcm_substream *substream; 3121 struct snd_pcm_runtime *runtime; 3122 snd_pcm_sframes_t result; 3123 unsigned long i; 3124 void __user **bufs; 3125 snd_pcm_uframes_t frames; 3126 3127 pcm_file = iocb->ki_filp->private_data; 3128 substream = pcm_file->substream; 3129 if (PCM_RUNTIME_CHECK(substream)) 3130 return -ENXIO; 3131 runtime = substream->runtime; 3132 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 3133 return -EBADFD; 3134 if (!iter_is_iovec(from)) 3135 return -EINVAL; 3136 if (from->nr_segs > 128 || from->nr_segs != runtime->channels || 3137 !frame_aligned(runtime, from->iov->iov_len)) 3138 return -EINVAL; 3139 frames = bytes_to_samples(runtime, from->iov->iov_len); 3140 bufs = kmalloc(sizeof(void *) * from->nr_segs, GFP_KERNEL); 3141 if (bufs == NULL) 3142 return -ENOMEM; 3143 for (i = 0; i < from->nr_segs; ++i) 3144 bufs[i] = from->iov[i].iov_base; 3145 result = snd_pcm_lib_writev(substream, bufs, frames); 3146 if (result > 0) 3147 result = frames_to_bytes(runtime, result); 3148 kfree(bufs); 3149 return result; 3150 } 3151 3152 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait) 3153 { 3154 struct snd_pcm_file *pcm_file; 3155 struct snd_pcm_substream *substream; 3156 struct snd_pcm_runtime *runtime; 3157 unsigned int mask; 3158 snd_pcm_uframes_t avail; 3159 3160 pcm_file = file->private_data; 3161 3162 substream = pcm_file->substream; 3163 if (PCM_RUNTIME_CHECK(substream)) 3164 return POLLOUT | POLLWRNORM | POLLERR; 3165 runtime = substream->runtime; 3166 3167 poll_wait(file, &runtime->sleep, wait); 3168 3169 snd_pcm_stream_lock_irq(substream); 3170 avail = snd_pcm_playback_avail(runtime); 3171 switch (runtime->status->state) { 3172 case SNDRV_PCM_STATE_RUNNING: 3173 case SNDRV_PCM_STATE_PREPARED: 3174 case SNDRV_PCM_STATE_PAUSED: 3175 if (avail >= runtime->control->avail_min) { 3176 mask = POLLOUT | POLLWRNORM; 3177 break; 3178 } 3179 /* Fall through */ 3180 case SNDRV_PCM_STATE_DRAINING: 3181 mask = 0; 3182 break; 3183 default: 3184 mask = POLLOUT | POLLWRNORM | POLLERR; 3185 break; 3186 } 3187 snd_pcm_stream_unlock_irq(substream); 3188 return mask; 3189 } 3190 3191 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait) 3192 { 3193 struct snd_pcm_file *pcm_file; 3194 struct snd_pcm_substream *substream; 3195 struct snd_pcm_runtime *runtime; 3196 unsigned int mask; 3197 snd_pcm_uframes_t avail; 3198 3199 pcm_file = file->private_data; 3200 3201 substream = pcm_file->substream; 3202 if (PCM_RUNTIME_CHECK(substream)) 3203 return POLLIN | POLLRDNORM | POLLERR; 3204 runtime = substream->runtime; 3205 3206 poll_wait(file, &runtime->sleep, wait); 3207 3208 snd_pcm_stream_lock_irq(substream); 3209 avail = snd_pcm_capture_avail(runtime); 3210 switch (runtime->status->state) { 3211 case SNDRV_PCM_STATE_RUNNING: 3212 case SNDRV_PCM_STATE_PREPARED: 3213 case SNDRV_PCM_STATE_PAUSED: 3214 if (avail >= runtime->control->avail_min) { 3215 mask = POLLIN | POLLRDNORM; 3216 break; 3217 } 3218 mask = 0; 3219 break; 3220 case SNDRV_PCM_STATE_DRAINING: 3221 if (avail > 0) { 3222 mask = POLLIN | POLLRDNORM; 3223 break; 3224 } 3225 /* Fall through */ 3226 default: 3227 mask = POLLIN | POLLRDNORM | POLLERR; 3228 break; 3229 } 3230 snd_pcm_stream_unlock_irq(substream); 3231 return mask; 3232 } 3233 3234 /* 3235 * mmap support 3236 */ 3237 3238 /* 3239 * Only on coherent architectures, we can mmap the status and the control records 3240 * for effcient data transfer. On others, we have to use HWSYNC ioctl... 3241 */ 3242 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) 3243 /* 3244 * mmap status record 3245 */ 3246 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area, 3247 struct vm_fault *vmf) 3248 { 3249 struct snd_pcm_substream *substream = area->vm_private_data; 3250 struct snd_pcm_runtime *runtime; 3251 3252 if (substream == NULL) 3253 return VM_FAULT_SIGBUS; 3254 runtime = substream->runtime; 3255 vmf->page = virt_to_page(runtime->status); 3256 get_page(vmf->page); 3257 return 0; 3258 } 3259 3260 static const struct vm_operations_struct snd_pcm_vm_ops_status = 3261 { 3262 .fault = snd_pcm_mmap_status_fault, 3263 }; 3264 3265 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, 3266 struct vm_area_struct *area) 3267 { 3268 long size; 3269 if (!(area->vm_flags & VM_READ)) 3270 return -EINVAL; 3271 size = area->vm_end - area->vm_start; 3272 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))) 3273 return -EINVAL; 3274 area->vm_ops = &snd_pcm_vm_ops_status; 3275 area->vm_private_data = substream; 3276 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; 3277 return 0; 3278 } 3279 3280 /* 3281 * mmap control record 3282 */ 3283 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area, 3284 struct vm_fault *vmf) 3285 { 3286 struct snd_pcm_substream *substream = area->vm_private_data; 3287 struct snd_pcm_runtime *runtime; 3288 3289 if (substream == NULL) 3290 return VM_FAULT_SIGBUS; 3291 runtime = substream->runtime; 3292 vmf->page = virt_to_page(runtime->control); 3293 get_page(vmf->page); 3294 return 0; 3295 } 3296 3297 static const struct vm_operations_struct snd_pcm_vm_ops_control = 3298 { 3299 .fault = snd_pcm_mmap_control_fault, 3300 }; 3301 3302 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, 3303 struct vm_area_struct *area) 3304 { 3305 long size; 3306 if (!(area->vm_flags & VM_READ)) 3307 return -EINVAL; 3308 size = area->vm_end - area->vm_start; 3309 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))) 3310 return -EINVAL; 3311 area->vm_ops = &snd_pcm_vm_ops_control; 3312 area->vm_private_data = substream; 3313 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; 3314 return 0; 3315 } 3316 #else /* ! coherent mmap */ 3317 /* 3318 * don't support mmap for status and control records. 3319 */ 3320 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, 3321 struct vm_area_struct *area) 3322 { 3323 return -ENXIO; 3324 } 3325 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, 3326 struct vm_area_struct *area) 3327 { 3328 return -ENXIO; 3329 } 3330 #endif /* coherent mmap */ 3331 3332 static inline struct page * 3333 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs) 3334 { 3335 void *vaddr = substream->runtime->dma_area + ofs; 3336 return virt_to_page(vaddr); 3337 } 3338 3339 /* 3340 * fault callback for mmapping a RAM page 3341 */ 3342 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area, 3343 struct vm_fault *vmf) 3344 { 3345 struct snd_pcm_substream *substream = area->vm_private_data; 3346 struct snd_pcm_runtime *runtime; 3347 unsigned long offset; 3348 struct page * page; 3349 size_t dma_bytes; 3350 3351 if (substream == NULL) 3352 return VM_FAULT_SIGBUS; 3353 runtime = substream->runtime; 3354 offset = vmf->pgoff << PAGE_SHIFT; 3355 dma_bytes = PAGE_ALIGN(runtime->dma_bytes); 3356 if (offset > dma_bytes - PAGE_SIZE) 3357 return VM_FAULT_SIGBUS; 3358 if (substream->ops->page) 3359 page = substream->ops->page(substream, offset); 3360 else 3361 page = snd_pcm_default_page_ops(substream, offset); 3362 if (!page) 3363 return VM_FAULT_SIGBUS; 3364 get_page(page); 3365 vmf->page = page; 3366 return 0; 3367 } 3368 3369 static const struct vm_operations_struct snd_pcm_vm_ops_data = { 3370 .open = snd_pcm_mmap_data_open, 3371 .close = snd_pcm_mmap_data_close, 3372 }; 3373 3374 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = { 3375 .open = snd_pcm_mmap_data_open, 3376 .close = snd_pcm_mmap_data_close, 3377 .fault = snd_pcm_mmap_data_fault, 3378 }; 3379 3380 /* 3381 * mmap the DMA buffer on RAM 3382 */ 3383 3384 /** 3385 * snd_pcm_lib_default_mmap - Default PCM data mmap function 3386 * @substream: PCM substream 3387 * @area: VMA 3388 * 3389 * This is the default mmap handler for PCM data. When mmap pcm_ops is NULL, 3390 * this function is invoked implicitly. 3391 */ 3392 int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream, 3393 struct vm_area_struct *area) 3394 { 3395 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; 3396 #ifdef CONFIG_GENERIC_ALLOCATOR 3397 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_IRAM) { 3398 area->vm_page_prot = pgprot_writecombine(area->vm_page_prot); 3399 return remap_pfn_range(area, area->vm_start, 3400 substream->dma_buffer.addr >> PAGE_SHIFT, 3401 area->vm_end - area->vm_start, area->vm_page_prot); 3402 } 3403 #endif /* CONFIG_GENERIC_ALLOCATOR */ 3404 #ifndef CONFIG_X86 /* for avoiding warnings arch/x86/mm/pat.c */ 3405 if (!substream->ops->page && 3406 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) 3407 return dma_mmap_coherent(substream->dma_buffer.dev.dev, 3408 area, 3409 substream->runtime->dma_area, 3410 substream->runtime->dma_addr, 3411 area->vm_end - area->vm_start); 3412 #endif /* CONFIG_X86 */ 3413 /* mmap with fault handler */ 3414 area->vm_ops = &snd_pcm_vm_ops_data_fault; 3415 return 0; 3416 } 3417 EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap); 3418 3419 /* 3420 * mmap the DMA buffer on I/O memory area 3421 */ 3422 #if SNDRV_PCM_INFO_MMAP_IOMEM 3423 /** 3424 * snd_pcm_lib_mmap_iomem - Default PCM data mmap function for I/O mem 3425 * @substream: PCM substream 3426 * @area: VMA 3427 * 3428 * When your hardware uses the iomapped pages as the hardware buffer and 3429 * wants to mmap it, pass this function as mmap pcm_ops. Note that this 3430 * is supposed to work only on limited architectures. 3431 */ 3432 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, 3433 struct vm_area_struct *area) 3434 { 3435 struct snd_pcm_runtime *runtime = substream->runtime;; 3436 3437 area->vm_page_prot = pgprot_noncached(area->vm_page_prot); 3438 return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes); 3439 } 3440 3441 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem); 3442 #endif /* SNDRV_PCM_INFO_MMAP */ 3443 3444 /* 3445 * mmap DMA buffer 3446 */ 3447 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, 3448 struct vm_area_struct *area) 3449 { 3450 struct snd_pcm_runtime *runtime; 3451 long size; 3452 unsigned long offset; 3453 size_t dma_bytes; 3454 int err; 3455 3456 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 3457 if (!(area->vm_flags & (VM_WRITE|VM_READ))) 3458 return -EINVAL; 3459 } else { 3460 if (!(area->vm_flags & VM_READ)) 3461 return -EINVAL; 3462 } 3463 runtime = substream->runtime; 3464 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 3465 return -EBADFD; 3466 if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) 3467 return -ENXIO; 3468 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || 3469 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) 3470 return -EINVAL; 3471 size = area->vm_end - area->vm_start; 3472 offset = area->vm_pgoff << PAGE_SHIFT; 3473 dma_bytes = PAGE_ALIGN(runtime->dma_bytes); 3474 if ((size_t)size > dma_bytes) 3475 return -EINVAL; 3476 if (offset > dma_bytes - size) 3477 return -EINVAL; 3478 3479 area->vm_ops = &snd_pcm_vm_ops_data; 3480 area->vm_private_data = substream; 3481 if (substream->ops->mmap) 3482 err = substream->ops->mmap(substream, area); 3483 else 3484 err = snd_pcm_lib_default_mmap(substream, area); 3485 if (!err) 3486 atomic_inc(&substream->mmap_count); 3487 return err; 3488 } 3489 3490 EXPORT_SYMBOL(snd_pcm_mmap_data); 3491 3492 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area) 3493 { 3494 struct snd_pcm_file * pcm_file; 3495 struct snd_pcm_substream *substream; 3496 unsigned long offset; 3497 3498 pcm_file = file->private_data; 3499 substream = pcm_file->substream; 3500 if (PCM_RUNTIME_CHECK(substream)) 3501 return -ENXIO; 3502 3503 offset = area->vm_pgoff << PAGE_SHIFT; 3504 switch (offset) { 3505 case SNDRV_PCM_MMAP_OFFSET_STATUS: 3506 if (pcm_file->no_compat_mmap) 3507 return -ENXIO; 3508 return snd_pcm_mmap_status(substream, file, area); 3509 case SNDRV_PCM_MMAP_OFFSET_CONTROL: 3510 if (pcm_file->no_compat_mmap) 3511 return -ENXIO; 3512 return snd_pcm_mmap_control(substream, file, area); 3513 default: 3514 return snd_pcm_mmap_data(substream, file, area); 3515 } 3516 return 0; 3517 } 3518 3519 static int snd_pcm_fasync(int fd, struct file * file, int on) 3520 { 3521 struct snd_pcm_file * pcm_file; 3522 struct snd_pcm_substream *substream; 3523 struct snd_pcm_runtime *runtime; 3524 3525 pcm_file = file->private_data; 3526 substream = pcm_file->substream; 3527 if (PCM_RUNTIME_CHECK(substream)) 3528 return -ENXIO; 3529 runtime = substream->runtime; 3530 return fasync_helper(fd, file, on, &runtime->fasync); 3531 } 3532 3533 /* 3534 * ioctl32 compat 3535 */ 3536 #ifdef CONFIG_COMPAT 3537 #include "pcm_compat.c" 3538 #else 3539 #define snd_pcm_ioctl_compat NULL 3540 #endif 3541 3542 /* 3543 * To be removed helpers to keep binary compatibility 3544 */ 3545 3546 #ifdef CONFIG_SND_SUPPORT_OLD_API 3547 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5)) 3548 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5)) 3549 3550 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params, 3551 struct snd_pcm_hw_params_old *oparams) 3552 { 3553 unsigned int i; 3554 3555 memset(params, 0, sizeof(*params)); 3556 params->flags = oparams->flags; 3557 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) 3558 params->masks[i].bits[0] = oparams->masks[i]; 3559 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals)); 3560 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask); 3561 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask); 3562 params->info = oparams->info; 3563 params->msbits = oparams->msbits; 3564 params->rate_num = oparams->rate_num; 3565 params->rate_den = oparams->rate_den; 3566 params->fifo_size = oparams->fifo_size; 3567 } 3568 3569 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams, 3570 struct snd_pcm_hw_params *params) 3571 { 3572 unsigned int i; 3573 3574 memset(oparams, 0, sizeof(*oparams)); 3575 oparams->flags = params->flags; 3576 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) 3577 oparams->masks[i] = params->masks[i].bits[0]; 3578 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals)); 3579 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask); 3580 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask); 3581 oparams->info = params->info; 3582 oparams->msbits = params->msbits; 3583 oparams->rate_num = params->rate_num; 3584 oparams->rate_den = params->rate_den; 3585 oparams->fifo_size = params->fifo_size; 3586 } 3587 3588 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, 3589 struct snd_pcm_hw_params_old __user * _oparams) 3590 { 3591 struct snd_pcm_hw_params *params; 3592 struct snd_pcm_hw_params_old *oparams = NULL; 3593 int err; 3594 3595 params = kmalloc(sizeof(*params), GFP_KERNEL); 3596 if (!params) 3597 return -ENOMEM; 3598 3599 oparams = memdup_user(_oparams, sizeof(*oparams)); 3600 if (IS_ERR(oparams)) { 3601 err = PTR_ERR(oparams); 3602 goto out; 3603 } 3604 snd_pcm_hw_convert_from_old_params(params, oparams); 3605 err = snd_pcm_hw_refine(substream, params); 3606 snd_pcm_hw_convert_to_old_params(oparams, params); 3607 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { 3608 if (!err) 3609 err = -EFAULT; 3610 } 3611 3612 kfree(oparams); 3613 out: 3614 kfree(params); 3615 return err; 3616 } 3617 3618 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, 3619 struct snd_pcm_hw_params_old __user * _oparams) 3620 { 3621 struct snd_pcm_hw_params *params; 3622 struct snd_pcm_hw_params_old *oparams = NULL; 3623 int err; 3624 3625 params = kmalloc(sizeof(*params), GFP_KERNEL); 3626 if (!params) 3627 return -ENOMEM; 3628 3629 oparams = memdup_user(_oparams, sizeof(*oparams)); 3630 if (IS_ERR(oparams)) { 3631 err = PTR_ERR(oparams); 3632 goto out; 3633 } 3634 snd_pcm_hw_convert_from_old_params(params, oparams); 3635 err = snd_pcm_hw_params(substream, params); 3636 snd_pcm_hw_convert_to_old_params(oparams, params); 3637 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { 3638 if (!err) 3639 err = -EFAULT; 3640 } 3641 3642 kfree(oparams); 3643 out: 3644 kfree(params); 3645 return err; 3646 } 3647 #endif /* CONFIG_SND_SUPPORT_OLD_API */ 3648 3649 #ifndef CONFIG_MMU 3650 static unsigned long snd_pcm_get_unmapped_area(struct file *file, 3651 unsigned long addr, 3652 unsigned long len, 3653 unsigned long pgoff, 3654 unsigned long flags) 3655 { 3656 struct snd_pcm_file *pcm_file = file->private_data; 3657 struct snd_pcm_substream *substream = pcm_file->substream; 3658 struct snd_pcm_runtime *runtime = substream->runtime; 3659 unsigned long offset = pgoff << PAGE_SHIFT; 3660 3661 switch (offset) { 3662 case SNDRV_PCM_MMAP_OFFSET_STATUS: 3663 return (unsigned long)runtime->status; 3664 case SNDRV_PCM_MMAP_OFFSET_CONTROL: 3665 return (unsigned long)runtime->control; 3666 default: 3667 return (unsigned long)runtime->dma_area + offset; 3668 } 3669 } 3670 #else 3671 # define snd_pcm_get_unmapped_area NULL 3672 #endif 3673 3674 /* 3675 * Register section 3676 */ 3677 3678 const struct file_operations snd_pcm_f_ops[2] = { 3679 { 3680 .owner = THIS_MODULE, 3681 .write = snd_pcm_write, 3682 .write_iter = snd_pcm_writev, 3683 .open = snd_pcm_playback_open, 3684 .release = snd_pcm_release, 3685 .llseek = no_llseek, 3686 .poll = snd_pcm_playback_poll, 3687 .unlocked_ioctl = snd_pcm_playback_ioctl, 3688 .compat_ioctl = snd_pcm_ioctl_compat, 3689 .mmap = snd_pcm_mmap, 3690 .fasync = snd_pcm_fasync, 3691 .get_unmapped_area = snd_pcm_get_unmapped_area, 3692 }, 3693 { 3694 .owner = THIS_MODULE, 3695 .read = snd_pcm_read, 3696 .read_iter = snd_pcm_readv, 3697 .open = snd_pcm_capture_open, 3698 .release = snd_pcm_release, 3699 .llseek = no_llseek, 3700 .poll = snd_pcm_capture_poll, 3701 .unlocked_ioctl = snd_pcm_capture_ioctl, 3702 .compat_ioctl = snd_pcm_ioctl_compat, 3703 .mmap = snd_pcm_mmap, 3704 .fasync = snd_pcm_fasync, 3705 .get_unmapped_area = snd_pcm_get_unmapped_area, 3706 } 3707 }; 3708