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/sched/signal.h> 27 #include <linux/time.h> 28 #include <linux/pm_qos.h> 29 #include <linux/io.h> 30 #include <linux/dma-mapping.h> 31 #include <sound/core.h> 32 #include <sound/control.h> 33 #include <sound/info.h> 34 #include <sound/pcm.h> 35 #include <sound/pcm_params.h> 36 #include <sound/timer.h> 37 #include <sound/minors.h> 38 #include <linux/uio.h> 39 40 /* 41 * Compatibility 42 */ 43 44 struct snd_pcm_hw_params_old { 45 unsigned int flags; 46 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT - 47 SNDRV_PCM_HW_PARAM_ACCESS + 1]; 48 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME - 49 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1]; 50 unsigned int rmask; 51 unsigned int cmask; 52 unsigned int info; 53 unsigned int msbits; 54 unsigned int rate_num; 55 unsigned int rate_den; 56 snd_pcm_uframes_t fifo_size; 57 unsigned char reserved[64]; 58 }; 59 60 #ifdef CONFIG_SND_SUPPORT_OLD_API 61 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old) 62 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old) 63 64 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, 65 struct snd_pcm_hw_params_old __user * _oparams); 66 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, 67 struct snd_pcm_hw_params_old __user * _oparams); 68 #endif 69 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream); 70 71 /* 72 * 73 */ 74 75 static DEFINE_RWLOCK(snd_pcm_link_rwlock); 76 static DECLARE_RWSEM(snd_pcm_link_rwsem); 77 78 /* Writer in rwsem may block readers even during its waiting in queue, 79 * and this may lead to a deadlock when the code path takes read sem 80 * twice (e.g. one in snd_pcm_action_nonatomic() and another in 81 * snd_pcm_stream_lock()). As a (suboptimal) workaround, let writer to 82 * spin until it gets the lock. 83 */ 84 static inline void down_write_nonblock(struct rw_semaphore *lock) 85 { 86 while (!down_write_trylock(lock)) 87 cond_resched(); 88 } 89 90 /** 91 * snd_pcm_stream_lock - Lock the PCM stream 92 * @substream: PCM substream 93 * 94 * This locks the PCM stream's spinlock or mutex depending on the nonatomic 95 * flag of the given substream. This also takes the global link rw lock 96 * (or rw sem), too, for avoiding the race with linked streams. 97 */ 98 void snd_pcm_stream_lock(struct snd_pcm_substream *substream) 99 { 100 if (substream->pcm->nonatomic) { 101 down_read_nested(&snd_pcm_link_rwsem, SINGLE_DEPTH_NESTING); 102 mutex_lock(&substream->self_group.mutex); 103 } else { 104 read_lock(&snd_pcm_link_rwlock); 105 spin_lock(&substream->self_group.lock); 106 } 107 } 108 EXPORT_SYMBOL_GPL(snd_pcm_stream_lock); 109 110 /** 111 * snd_pcm_stream_lock - Unlock the PCM stream 112 * @substream: PCM substream 113 * 114 * This unlocks the PCM stream that has been locked via snd_pcm_stream_lock(). 115 */ 116 void snd_pcm_stream_unlock(struct snd_pcm_substream *substream) 117 { 118 if (substream->pcm->nonatomic) { 119 mutex_unlock(&substream->self_group.mutex); 120 up_read(&snd_pcm_link_rwsem); 121 } else { 122 spin_unlock(&substream->self_group.lock); 123 read_unlock(&snd_pcm_link_rwlock); 124 } 125 } 126 EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock); 127 128 /** 129 * snd_pcm_stream_lock_irq - Lock the PCM stream 130 * @substream: PCM substream 131 * 132 * This locks the PCM stream like snd_pcm_stream_lock() and disables the local 133 * IRQ (only when nonatomic is false). In nonatomic case, this is identical 134 * as snd_pcm_stream_lock(). 135 */ 136 void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream) 137 { 138 if (!substream->pcm->nonatomic) 139 local_irq_disable(); 140 snd_pcm_stream_lock(substream); 141 } 142 EXPORT_SYMBOL_GPL(snd_pcm_stream_lock_irq); 143 144 /** 145 * snd_pcm_stream_unlock_irq - Unlock the PCM stream 146 * @substream: PCM substream 147 * 148 * This is a counter-part of snd_pcm_stream_lock_irq(). 149 */ 150 void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream) 151 { 152 snd_pcm_stream_unlock(substream); 153 if (!substream->pcm->nonatomic) 154 local_irq_enable(); 155 } 156 EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irq); 157 158 unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream) 159 { 160 unsigned long flags = 0; 161 if (!substream->pcm->nonatomic) 162 local_irq_save(flags); 163 snd_pcm_stream_lock(substream); 164 return flags; 165 } 166 EXPORT_SYMBOL_GPL(_snd_pcm_stream_lock_irqsave); 167 168 /** 169 * snd_pcm_stream_unlock_irqrestore - Unlock the PCM stream 170 * @substream: PCM substream 171 * @flags: irq flags 172 * 173 * This is a counter-part of snd_pcm_stream_lock_irqsave(). 174 */ 175 void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream, 176 unsigned long flags) 177 { 178 snd_pcm_stream_unlock(substream); 179 if (!substream->pcm->nonatomic) 180 local_irq_restore(flags); 181 } 182 EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irqrestore); 183 184 static inline mm_segment_t snd_enter_user(void) 185 { 186 mm_segment_t fs = get_fs(); 187 set_fs(get_ds()); 188 return fs; 189 } 190 191 static inline void snd_leave_user(mm_segment_t fs) 192 { 193 set_fs(fs); 194 } 195 196 197 198 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info) 199 { 200 struct snd_pcm_runtime *runtime; 201 struct snd_pcm *pcm = substream->pcm; 202 struct snd_pcm_str *pstr = substream->pstr; 203 204 memset(info, 0, sizeof(*info)); 205 info->card = pcm->card->number; 206 info->device = pcm->device; 207 info->stream = substream->stream; 208 info->subdevice = substream->number; 209 strlcpy(info->id, pcm->id, sizeof(info->id)); 210 strlcpy(info->name, pcm->name, sizeof(info->name)); 211 info->dev_class = pcm->dev_class; 212 info->dev_subclass = pcm->dev_subclass; 213 info->subdevices_count = pstr->substream_count; 214 info->subdevices_avail = pstr->substream_count - pstr->substream_opened; 215 strlcpy(info->subname, substream->name, sizeof(info->subname)); 216 runtime = substream->runtime; 217 /* AB: FIXME!!! This is definitely nonsense */ 218 if (runtime) { 219 info->sync = runtime->sync; 220 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info); 221 } 222 return 0; 223 } 224 225 int snd_pcm_info_user(struct snd_pcm_substream *substream, 226 struct snd_pcm_info __user * _info) 227 { 228 struct snd_pcm_info *info; 229 int err; 230 231 info = kmalloc(sizeof(*info), GFP_KERNEL); 232 if (! info) 233 return -ENOMEM; 234 err = snd_pcm_info(substream, info); 235 if (err >= 0) { 236 if (copy_to_user(_info, info, sizeof(*info))) 237 err = -EFAULT; 238 } 239 kfree(info); 240 return err; 241 } 242 243 static bool hw_support_mmap(struct snd_pcm_substream *substream) 244 { 245 if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_MMAP)) 246 return false; 247 /* check architectures that return -EINVAL from dma_mmap_coherent() */ 248 /* FIXME: this should be some global flag */ 249 #if defined(CONFIG_C6X) || defined(CONFIG_FRV) || defined(CONFIG_MN10300) ||\ 250 defined(CONFIG_PARISC) || defined(CONFIG_XTENSA) 251 if (!substream->ops->mmap && 252 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) 253 return false; 254 #endif 255 return true; 256 } 257 258 #undef RULES_DEBUG 259 260 #ifdef RULES_DEBUG 261 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v 262 static const char * const snd_pcm_hw_param_names[] = { 263 HW_PARAM(ACCESS), 264 HW_PARAM(FORMAT), 265 HW_PARAM(SUBFORMAT), 266 HW_PARAM(SAMPLE_BITS), 267 HW_PARAM(FRAME_BITS), 268 HW_PARAM(CHANNELS), 269 HW_PARAM(RATE), 270 HW_PARAM(PERIOD_TIME), 271 HW_PARAM(PERIOD_SIZE), 272 HW_PARAM(PERIOD_BYTES), 273 HW_PARAM(PERIODS), 274 HW_PARAM(BUFFER_TIME), 275 HW_PARAM(BUFFER_SIZE), 276 HW_PARAM(BUFFER_BYTES), 277 HW_PARAM(TICK_TIME), 278 }; 279 #endif 280 281 int snd_pcm_hw_refine(struct snd_pcm_substream *substream, 282 struct snd_pcm_hw_params *params) 283 { 284 unsigned int k; 285 struct snd_pcm_hardware *hw; 286 struct snd_interval *i = NULL; 287 struct snd_mask *m = NULL; 288 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints; 289 unsigned int rstamps[constrs->rules_num]; 290 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1]; 291 unsigned int stamp = 2; 292 int changed, again; 293 294 params->info = 0; 295 params->fifo_size = 0; 296 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS)) 297 params->msbits = 0; 298 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) { 299 params->rate_num = 0; 300 params->rate_den = 0; 301 } 302 303 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { 304 m = hw_param_mask(params, k); 305 if (snd_mask_empty(m)) 306 return -EINVAL; 307 if (!(params->rmask & (1 << k))) 308 continue; 309 #ifdef RULES_DEBUG 310 pr_debug("%s = ", snd_pcm_hw_param_names[k]); 311 pr_cont("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); 312 #endif 313 changed = snd_mask_refine(m, constrs_mask(constrs, k)); 314 #ifdef RULES_DEBUG 315 pr_cont("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); 316 #endif 317 if (changed) 318 params->cmask |= 1 << k; 319 if (changed < 0) 320 return changed; 321 } 322 323 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { 324 i = hw_param_interval(params, k); 325 if (snd_interval_empty(i)) 326 return -EINVAL; 327 if (!(params->rmask & (1 << k))) 328 continue; 329 #ifdef RULES_DEBUG 330 pr_debug("%s = ", snd_pcm_hw_param_names[k]); 331 if (i->empty) 332 pr_cont("empty"); 333 else 334 pr_cont("%c%u %u%c", 335 i->openmin ? '(' : '[', i->min, 336 i->max, i->openmax ? ')' : ']'); 337 pr_cont(" -> "); 338 #endif 339 changed = snd_interval_refine(i, constrs_interval(constrs, k)); 340 #ifdef RULES_DEBUG 341 if (i->empty) 342 pr_cont("empty\n"); 343 else 344 pr_cont("%c%u %u%c\n", 345 i->openmin ? '(' : '[', i->min, 346 i->max, i->openmax ? ')' : ']'); 347 #endif 348 if (changed) 349 params->cmask |= 1 << k; 350 if (changed < 0) 351 return changed; 352 } 353 354 for (k = 0; k < constrs->rules_num; k++) 355 rstamps[k] = 0; 356 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) 357 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0; 358 do { 359 again = 0; 360 for (k = 0; k < constrs->rules_num; k++) { 361 struct snd_pcm_hw_rule *r = &constrs->rules[k]; 362 unsigned int d; 363 int doit = 0; 364 if (r->cond && !(r->cond & params->flags)) 365 continue; 366 for (d = 0; r->deps[d] >= 0; d++) { 367 if (vstamps[r->deps[d]] > rstamps[k]) { 368 doit = 1; 369 break; 370 } 371 } 372 if (!doit) 373 continue; 374 #ifdef RULES_DEBUG 375 pr_debug("Rule %d [%p]: ", k, r->func); 376 if (r->var >= 0) { 377 pr_cont("%s = ", snd_pcm_hw_param_names[r->var]); 378 if (hw_is_mask(r->var)) { 379 m = hw_param_mask(params, r->var); 380 pr_cont("%x", *m->bits); 381 } else { 382 i = hw_param_interval(params, r->var); 383 if (i->empty) 384 pr_cont("empty"); 385 else 386 pr_cont("%c%u %u%c", 387 i->openmin ? '(' : '[', i->min, 388 i->max, i->openmax ? ')' : ']'); 389 } 390 } 391 #endif 392 changed = r->func(params, r); 393 #ifdef RULES_DEBUG 394 if (r->var >= 0) { 395 pr_cont(" -> "); 396 if (hw_is_mask(r->var)) 397 pr_cont("%x", *m->bits); 398 else { 399 if (i->empty) 400 pr_cont("empty"); 401 else 402 pr_cont("%c%u %u%c", 403 i->openmin ? '(' : '[', i->min, 404 i->max, i->openmax ? ')' : ']'); 405 } 406 } 407 pr_cont("\n"); 408 #endif 409 rstamps[k] = stamp; 410 if (changed && r->var >= 0) { 411 params->cmask |= (1 << r->var); 412 vstamps[r->var] = stamp; 413 again = 1; 414 } 415 if (changed < 0) 416 return changed; 417 stamp++; 418 } 419 } while (again); 420 if (!params->msbits) { 421 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); 422 if (snd_interval_single(i)) 423 params->msbits = snd_interval_value(i); 424 } 425 426 if (!params->rate_den) { 427 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); 428 if (snd_interval_single(i)) { 429 params->rate_num = snd_interval_value(i); 430 params->rate_den = 1; 431 } 432 } 433 434 hw = &substream->runtime->hw; 435 if (!params->info) { 436 params->info = hw->info & ~(SNDRV_PCM_INFO_FIFO_IN_FRAMES | 437 SNDRV_PCM_INFO_DRAIN_TRIGGER); 438 if (!hw_support_mmap(substream)) 439 params->info &= ~(SNDRV_PCM_INFO_MMAP | 440 SNDRV_PCM_INFO_MMAP_VALID); 441 } 442 if (!params->fifo_size) { 443 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 444 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 445 if (snd_mask_min(m) == snd_mask_max(m) && 446 snd_interval_min(i) == snd_interval_max(i)) { 447 changed = substream->ops->ioctl(substream, 448 SNDRV_PCM_IOCTL1_FIFO_SIZE, params); 449 if (changed < 0) 450 return changed; 451 } 452 } 453 params->rmask = 0; 454 return 0; 455 } 456 457 EXPORT_SYMBOL(snd_pcm_hw_refine); 458 459 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream, 460 struct snd_pcm_hw_params __user * _params) 461 { 462 struct snd_pcm_hw_params *params; 463 int err; 464 465 params = memdup_user(_params, sizeof(*params)); 466 if (IS_ERR(params)) 467 return PTR_ERR(params); 468 469 err = snd_pcm_hw_refine(substream, params); 470 if (copy_to_user(_params, params, sizeof(*params))) { 471 if (!err) 472 err = -EFAULT; 473 } 474 475 kfree(params); 476 return err; 477 } 478 479 static int period_to_usecs(struct snd_pcm_runtime *runtime) 480 { 481 int usecs; 482 483 if (! runtime->rate) 484 return -1; /* invalid */ 485 486 /* take 75% of period time as the deadline */ 487 usecs = (750000 / runtime->rate) * runtime->period_size; 488 usecs += ((750000 % runtime->rate) * runtime->period_size) / 489 runtime->rate; 490 491 return usecs; 492 } 493 494 static void snd_pcm_set_state(struct snd_pcm_substream *substream, int state) 495 { 496 snd_pcm_stream_lock_irq(substream); 497 if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED) 498 substream->runtime->status->state = state; 499 snd_pcm_stream_unlock_irq(substream); 500 } 501 502 static inline void snd_pcm_timer_notify(struct snd_pcm_substream *substream, 503 int event) 504 { 505 #ifdef CONFIG_SND_PCM_TIMER 506 if (substream->timer) 507 snd_timer_notify(substream->timer, event, 508 &substream->runtime->trigger_tstamp); 509 #endif 510 } 511 512 static int snd_pcm_hw_params(struct snd_pcm_substream *substream, 513 struct snd_pcm_hw_params *params) 514 { 515 struct snd_pcm_runtime *runtime; 516 int err, usecs; 517 unsigned int bits; 518 snd_pcm_uframes_t frames; 519 520 if (PCM_RUNTIME_CHECK(substream)) 521 return -ENXIO; 522 runtime = substream->runtime; 523 snd_pcm_stream_lock_irq(substream); 524 switch (runtime->status->state) { 525 case SNDRV_PCM_STATE_OPEN: 526 case SNDRV_PCM_STATE_SETUP: 527 case SNDRV_PCM_STATE_PREPARED: 528 break; 529 default: 530 snd_pcm_stream_unlock_irq(substream); 531 return -EBADFD; 532 } 533 snd_pcm_stream_unlock_irq(substream); 534 #if IS_ENABLED(CONFIG_SND_PCM_OSS) 535 if (!substream->oss.oss) 536 #endif 537 if (atomic_read(&substream->mmap_count)) 538 return -EBADFD; 539 540 params->rmask = ~0U; 541 err = snd_pcm_hw_refine(substream, params); 542 if (err < 0) 543 goto _error; 544 545 err = snd_pcm_hw_params_choose(substream, params); 546 if (err < 0) 547 goto _error; 548 549 if (substream->ops->hw_params != NULL) { 550 err = substream->ops->hw_params(substream, params); 551 if (err < 0) 552 goto _error; 553 } 554 555 runtime->access = params_access(params); 556 runtime->format = params_format(params); 557 runtime->subformat = params_subformat(params); 558 runtime->channels = params_channels(params); 559 runtime->rate = params_rate(params); 560 runtime->period_size = params_period_size(params); 561 runtime->periods = params_periods(params); 562 runtime->buffer_size = params_buffer_size(params); 563 runtime->info = params->info; 564 runtime->rate_num = params->rate_num; 565 runtime->rate_den = params->rate_den; 566 runtime->no_period_wakeup = 567 (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) && 568 (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP); 569 570 bits = snd_pcm_format_physical_width(runtime->format); 571 runtime->sample_bits = bits; 572 bits *= runtime->channels; 573 runtime->frame_bits = bits; 574 frames = 1; 575 while (bits % 8 != 0) { 576 bits *= 2; 577 frames *= 2; 578 } 579 runtime->byte_align = bits / 8; 580 runtime->min_align = frames; 581 582 /* Default sw params */ 583 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; 584 runtime->period_step = 1; 585 runtime->control->avail_min = runtime->period_size; 586 runtime->start_threshold = 1; 587 runtime->stop_threshold = runtime->buffer_size; 588 runtime->silence_threshold = 0; 589 runtime->silence_size = 0; 590 runtime->boundary = runtime->buffer_size; 591 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size) 592 runtime->boundary *= 2; 593 594 snd_pcm_timer_resolution_change(substream); 595 snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP); 596 597 if (pm_qos_request_active(&substream->latency_pm_qos_req)) 598 pm_qos_remove_request(&substream->latency_pm_qos_req); 599 if ((usecs = period_to_usecs(runtime)) >= 0) 600 pm_qos_add_request(&substream->latency_pm_qos_req, 601 PM_QOS_CPU_DMA_LATENCY, usecs); 602 return 0; 603 _error: 604 /* hardware might be unusable from this time, 605 so we force application to retry to set 606 the correct hardware parameter settings */ 607 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN); 608 if (substream->ops->hw_free != NULL) 609 substream->ops->hw_free(substream); 610 return err; 611 } 612 613 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream, 614 struct snd_pcm_hw_params __user * _params) 615 { 616 struct snd_pcm_hw_params *params; 617 int err; 618 619 params = memdup_user(_params, sizeof(*params)); 620 if (IS_ERR(params)) 621 return PTR_ERR(params); 622 623 err = snd_pcm_hw_params(substream, params); 624 if (copy_to_user(_params, params, sizeof(*params))) { 625 if (!err) 626 err = -EFAULT; 627 } 628 629 kfree(params); 630 return err; 631 } 632 633 static int snd_pcm_hw_free(struct snd_pcm_substream *substream) 634 { 635 struct snd_pcm_runtime *runtime; 636 int result = 0; 637 638 if (PCM_RUNTIME_CHECK(substream)) 639 return -ENXIO; 640 runtime = substream->runtime; 641 snd_pcm_stream_lock_irq(substream); 642 switch (runtime->status->state) { 643 case SNDRV_PCM_STATE_SETUP: 644 case SNDRV_PCM_STATE_PREPARED: 645 break; 646 default: 647 snd_pcm_stream_unlock_irq(substream); 648 return -EBADFD; 649 } 650 snd_pcm_stream_unlock_irq(substream); 651 if (atomic_read(&substream->mmap_count)) 652 return -EBADFD; 653 if (substream->ops->hw_free) 654 result = substream->ops->hw_free(substream); 655 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN); 656 pm_qos_remove_request(&substream->latency_pm_qos_req); 657 return result; 658 } 659 660 static int snd_pcm_sw_params(struct snd_pcm_substream *substream, 661 struct snd_pcm_sw_params *params) 662 { 663 struct snd_pcm_runtime *runtime; 664 int err; 665 666 if (PCM_RUNTIME_CHECK(substream)) 667 return -ENXIO; 668 runtime = substream->runtime; 669 snd_pcm_stream_lock_irq(substream); 670 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 671 snd_pcm_stream_unlock_irq(substream); 672 return -EBADFD; 673 } 674 snd_pcm_stream_unlock_irq(substream); 675 676 if (params->tstamp_mode < 0 || 677 params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST) 678 return -EINVAL; 679 if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12) && 680 params->tstamp_type > SNDRV_PCM_TSTAMP_TYPE_LAST) 681 return -EINVAL; 682 if (params->avail_min == 0) 683 return -EINVAL; 684 if (params->silence_size >= runtime->boundary) { 685 if (params->silence_threshold != 0) 686 return -EINVAL; 687 } else { 688 if (params->silence_size > params->silence_threshold) 689 return -EINVAL; 690 if (params->silence_threshold > runtime->buffer_size) 691 return -EINVAL; 692 } 693 err = 0; 694 snd_pcm_stream_lock_irq(substream); 695 runtime->tstamp_mode = params->tstamp_mode; 696 if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12)) 697 runtime->tstamp_type = params->tstamp_type; 698 runtime->period_step = params->period_step; 699 runtime->control->avail_min = params->avail_min; 700 runtime->start_threshold = params->start_threshold; 701 runtime->stop_threshold = params->stop_threshold; 702 runtime->silence_threshold = params->silence_threshold; 703 runtime->silence_size = params->silence_size; 704 params->boundary = runtime->boundary; 705 if (snd_pcm_running(substream)) { 706 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 707 runtime->silence_size > 0) 708 snd_pcm_playback_silence(substream, ULONG_MAX); 709 err = snd_pcm_update_state(substream, runtime); 710 } 711 snd_pcm_stream_unlock_irq(substream); 712 return err; 713 } 714 715 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream, 716 struct snd_pcm_sw_params __user * _params) 717 { 718 struct snd_pcm_sw_params params; 719 int err; 720 if (copy_from_user(¶ms, _params, sizeof(params))) 721 return -EFAULT; 722 err = snd_pcm_sw_params(substream, ¶ms); 723 if (copy_to_user(_params, ¶ms, sizeof(params))) 724 return -EFAULT; 725 return err; 726 } 727 728 int snd_pcm_status(struct snd_pcm_substream *substream, 729 struct snd_pcm_status *status) 730 { 731 struct snd_pcm_runtime *runtime = substream->runtime; 732 733 snd_pcm_stream_lock_irq(substream); 734 735 snd_pcm_unpack_audio_tstamp_config(status->audio_tstamp_data, 736 &runtime->audio_tstamp_config); 737 738 /* backwards compatible behavior */ 739 if (runtime->audio_tstamp_config.type_requested == 740 SNDRV_PCM_AUDIO_TSTAMP_TYPE_COMPAT) { 741 if (runtime->hw.info & SNDRV_PCM_INFO_HAS_WALL_CLOCK) 742 runtime->audio_tstamp_config.type_requested = 743 SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK; 744 else 745 runtime->audio_tstamp_config.type_requested = 746 SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT; 747 runtime->audio_tstamp_report.valid = 0; 748 } else 749 runtime->audio_tstamp_report.valid = 1; 750 751 status->state = runtime->status->state; 752 status->suspended_state = runtime->status->suspended_state; 753 if (status->state == SNDRV_PCM_STATE_OPEN) 754 goto _end; 755 status->trigger_tstamp = runtime->trigger_tstamp; 756 if (snd_pcm_running(substream)) { 757 snd_pcm_update_hw_ptr(substream); 758 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { 759 status->tstamp = runtime->status->tstamp; 760 status->driver_tstamp = runtime->driver_tstamp; 761 status->audio_tstamp = 762 runtime->status->audio_tstamp; 763 if (runtime->audio_tstamp_report.valid == 1) 764 /* backwards compatibility, no report provided in COMPAT mode */ 765 snd_pcm_pack_audio_tstamp_report(&status->audio_tstamp_data, 766 &status->audio_tstamp_accuracy, 767 &runtime->audio_tstamp_report); 768 769 goto _tstamp_end; 770 } 771 } else { 772 /* get tstamp only in fallback mode and only if enabled */ 773 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) 774 snd_pcm_gettime(runtime, &status->tstamp); 775 } 776 _tstamp_end: 777 status->appl_ptr = runtime->control->appl_ptr; 778 status->hw_ptr = runtime->status->hw_ptr; 779 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 780 status->avail = snd_pcm_playback_avail(runtime); 781 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING || 782 runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 783 status->delay = runtime->buffer_size - status->avail; 784 status->delay += runtime->delay; 785 } else 786 status->delay = 0; 787 } else { 788 status->avail = snd_pcm_capture_avail(runtime); 789 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) 790 status->delay = status->avail + runtime->delay; 791 else 792 status->delay = 0; 793 } 794 status->avail_max = runtime->avail_max; 795 status->overrange = runtime->overrange; 796 runtime->avail_max = 0; 797 runtime->overrange = 0; 798 _end: 799 snd_pcm_stream_unlock_irq(substream); 800 return 0; 801 } 802 803 static int snd_pcm_status_user(struct snd_pcm_substream *substream, 804 struct snd_pcm_status __user * _status, 805 bool ext) 806 { 807 struct snd_pcm_status status; 808 int res; 809 810 memset(&status, 0, sizeof(status)); 811 /* 812 * with extension, parameters are read/write, 813 * get audio_tstamp_data from user, 814 * ignore rest of status structure 815 */ 816 if (ext && get_user(status.audio_tstamp_data, 817 (u32 __user *)(&_status->audio_tstamp_data))) 818 return -EFAULT; 819 res = snd_pcm_status(substream, &status); 820 if (res < 0) 821 return res; 822 if (copy_to_user(_status, &status, sizeof(status))) 823 return -EFAULT; 824 return 0; 825 } 826 827 static int snd_pcm_channel_info(struct snd_pcm_substream *substream, 828 struct snd_pcm_channel_info * info) 829 { 830 struct snd_pcm_runtime *runtime; 831 unsigned int channel; 832 833 channel = info->channel; 834 runtime = substream->runtime; 835 snd_pcm_stream_lock_irq(substream); 836 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 837 snd_pcm_stream_unlock_irq(substream); 838 return -EBADFD; 839 } 840 snd_pcm_stream_unlock_irq(substream); 841 if (channel >= runtime->channels) 842 return -EINVAL; 843 memset(info, 0, sizeof(*info)); 844 info->channel = channel; 845 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info); 846 } 847 848 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream, 849 struct snd_pcm_channel_info __user * _info) 850 { 851 struct snd_pcm_channel_info info; 852 int res; 853 854 if (copy_from_user(&info, _info, sizeof(info))) 855 return -EFAULT; 856 res = snd_pcm_channel_info(substream, &info); 857 if (res < 0) 858 return res; 859 if (copy_to_user(_info, &info, sizeof(info))) 860 return -EFAULT; 861 return 0; 862 } 863 864 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream) 865 { 866 struct snd_pcm_runtime *runtime = substream->runtime; 867 if (runtime->trigger_master == NULL) 868 return; 869 if (runtime->trigger_master == substream) { 870 if (!runtime->trigger_tstamp_latched) 871 snd_pcm_gettime(runtime, &runtime->trigger_tstamp); 872 } else { 873 snd_pcm_trigger_tstamp(runtime->trigger_master); 874 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp; 875 } 876 runtime->trigger_master = NULL; 877 } 878 879 struct action_ops { 880 int (*pre_action)(struct snd_pcm_substream *substream, int state); 881 int (*do_action)(struct snd_pcm_substream *substream, int state); 882 void (*undo_action)(struct snd_pcm_substream *substream, int state); 883 void (*post_action)(struct snd_pcm_substream *substream, int state); 884 }; 885 886 /* 887 * this functions is core for handling of linked stream 888 * Note: the stream state might be changed also on failure 889 * Note2: call with calling stream lock + link lock 890 */ 891 static int snd_pcm_action_group(const struct action_ops *ops, 892 struct snd_pcm_substream *substream, 893 int state, int do_lock) 894 { 895 struct snd_pcm_substream *s = NULL; 896 struct snd_pcm_substream *s1; 897 int res = 0, depth = 1; 898 899 snd_pcm_group_for_each_entry(s, substream) { 900 if (do_lock && s != substream) { 901 if (s->pcm->nonatomic) 902 mutex_lock_nested(&s->self_group.mutex, depth); 903 else 904 spin_lock_nested(&s->self_group.lock, depth); 905 depth++; 906 } 907 res = ops->pre_action(s, state); 908 if (res < 0) 909 goto _unlock; 910 } 911 snd_pcm_group_for_each_entry(s, substream) { 912 res = ops->do_action(s, state); 913 if (res < 0) { 914 if (ops->undo_action) { 915 snd_pcm_group_for_each_entry(s1, substream) { 916 if (s1 == s) /* failed stream */ 917 break; 918 ops->undo_action(s1, state); 919 } 920 } 921 s = NULL; /* unlock all */ 922 goto _unlock; 923 } 924 } 925 snd_pcm_group_for_each_entry(s, substream) { 926 ops->post_action(s, state); 927 } 928 _unlock: 929 if (do_lock) { 930 /* unlock streams */ 931 snd_pcm_group_for_each_entry(s1, substream) { 932 if (s1 != substream) { 933 if (s1->pcm->nonatomic) 934 mutex_unlock(&s1->self_group.mutex); 935 else 936 spin_unlock(&s1->self_group.lock); 937 } 938 if (s1 == s) /* end */ 939 break; 940 } 941 } 942 return res; 943 } 944 945 /* 946 * Note: call with stream lock 947 */ 948 static int snd_pcm_action_single(const struct action_ops *ops, 949 struct snd_pcm_substream *substream, 950 int state) 951 { 952 int res; 953 954 res = ops->pre_action(substream, state); 955 if (res < 0) 956 return res; 957 res = ops->do_action(substream, state); 958 if (res == 0) 959 ops->post_action(substream, state); 960 else if (ops->undo_action) 961 ops->undo_action(substream, state); 962 return res; 963 } 964 965 /* 966 * Note: call with stream lock 967 */ 968 static int snd_pcm_action(const struct action_ops *ops, 969 struct snd_pcm_substream *substream, 970 int state) 971 { 972 int res; 973 974 if (!snd_pcm_stream_linked(substream)) 975 return snd_pcm_action_single(ops, substream, state); 976 977 if (substream->pcm->nonatomic) { 978 if (!mutex_trylock(&substream->group->mutex)) { 979 mutex_unlock(&substream->self_group.mutex); 980 mutex_lock(&substream->group->mutex); 981 mutex_lock(&substream->self_group.mutex); 982 } 983 res = snd_pcm_action_group(ops, substream, state, 1); 984 mutex_unlock(&substream->group->mutex); 985 } else { 986 if (!spin_trylock(&substream->group->lock)) { 987 spin_unlock(&substream->self_group.lock); 988 spin_lock(&substream->group->lock); 989 spin_lock(&substream->self_group.lock); 990 } 991 res = snd_pcm_action_group(ops, substream, state, 1); 992 spin_unlock(&substream->group->lock); 993 } 994 return res; 995 } 996 997 /* 998 * Note: don't use any locks before 999 */ 1000 static int snd_pcm_action_lock_irq(const struct action_ops *ops, 1001 struct snd_pcm_substream *substream, 1002 int state) 1003 { 1004 int res; 1005 1006 snd_pcm_stream_lock_irq(substream); 1007 res = snd_pcm_action(ops, substream, state); 1008 snd_pcm_stream_unlock_irq(substream); 1009 return res; 1010 } 1011 1012 /* 1013 */ 1014 static int snd_pcm_action_nonatomic(const struct action_ops *ops, 1015 struct snd_pcm_substream *substream, 1016 int state) 1017 { 1018 int res; 1019 1020 down_read(&snd_pcm_link_rwsem); 1021 if (snd_pcm_stream_linked(substream)) 1022 res = snd_pcm_action_group(ops, substream, state, 0); 1023 else 1024 res = snd_pcm_action_single(ops, substream, state); 1025 up_read(&snd_pcm_link_rwsem); 1026 return res; 1027 } 1028 1029 /* 1030 * start callbacks 1031 */ 1032 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state) 1033 { 1034 struct snd_pcm_runtime *runtime = substream->runtime; 1035 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED) 1036 return -EBADFD; 1037 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 1038 !snd_pcm_playback_data(substream)) 1039 return -EPIPE; 1040 runtime->trigger_tstamp_latched = false; 1041 runtime->trigger_master = substream; 1042 return 0; 1043 } 1044 1045 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state) 1046 { 1047 if (substream->runtime->trigger_master != substream) 1048 return 0; 1049 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START); 1050 } 1051 1052 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state) 1053 { 1054 if (substream->runtime->trigger_master == substream) 1055 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); 1056 } 1057 1058 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state) 1059 { 1060 struct snd_pcm_runtime *runtime = substream->runtime; 1061 snd_pcm_trigger_tstamp(substream); 1062 runtime->hw_ptr_jiffies = jiffies; 1063 runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) / 1064 runtime->rate; 1065 runtime->status->state = state; 1066 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 1067 runtime->silence_size > 0) 1068 snd_pcm_playback_silence(substream, ULONG_MAX); 1069 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTART); 1070 } 1071 1072 static const struct action_ops snd_pcm_action_start = { 1073 .pre_action = snd_pcm_pre_start, 1074 .do_action = snd_pcm_do_start, 1075 .undo_action = snd_pcm_undo_start, 1076 .post_action = snd_pcm_post_start 1077 }; 1078 1079 /** 1080 * snd_pcm_start - start all linked streams 1081 * @substream: the PCM substream instance 1082 * 1083 * Return: Zero if successful, or a negative error code. 1084 */ 1085 int snd_pcm_start(struct snd_pcm_substream *substream) 1086 { 1087 return snd_pcm_action(&snd_pcm_action_start, substream, 1088 SNDRV_PCM_STATE_RUNNING); 1089 } 1090 1091 /* 1092 * stop callbacks 1093 */ 1094 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state) 1095 { 1096 struct snd_pcm_runtime *runtime = substream->runtime; 1097 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 1098 return -EBADFD; 1099 runtime->trigger_master = substream; 1100 return 0; 1101 } 1102 1103 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state) 1104 { 1105 if (substream->runtime->trigger_master == substream && 1106 snd_pcm_running(substream)) 1107 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); 1108 return 0; /* unconditonally stop all substreams */ 1109 } 1110 1111 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state) 1112 { 1113 struct snd_pcm_runtime *runtime = substream->runtime; 1114 if (runtime->status->state != state) { 1115 snd_pcm_trigger_tstamp(substream); 1116 runtime->status->state = state; 1117 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTOP); 1118 } 1119 wake_up(&runtime->sleep); 1120 wake_up(&runtime->tsleep); 1121 } 1122 1123 static const struct action_ops snd_pcm_action_stop = { 1124 .pre_action = snd_pcm_pre_stop, 1125 .do_action = snd_pcm_do_stop, 1126 .post_action = snd_pcm_post_stop 1127 }; 1128 1129 /** 1130 * snd_pcm_stop - try to stop all running streams in the substream group 1131 * @substream: the PCM substream instance 1132 * @state: PCM state after stopping the stream 1133 * 1134 * The state of each stream is then changed to the given state unconditionally. 1135 * 1136 * Return: Zero if successful, or a negative error code. 1137 */ 1138 int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state) 1139 { 1140 return snd_pcm_action(&snd_pcm_action_stop, substream, state); 1141 } 1142 1143 EXPORT_SYMBOL(snd_pcm_stop); 1144 1145 /** 1146 * snd_pcm_drain_done - stop the DMA only when the given stream is playback 1147 * @substream: the PCM substream 1148 * 1149 * After stopping, the state is changed to SETUP. 1150 * Unlike snd_pcm_stop(), this affects only the given stream. 1151 * 1152 * Return: Zero if succesful, or a negative error code. 1153 */ 1154 int snd_pcm_drain_done(struct snd_pcm_substream *substream) 1155 { 1156 return snd_pcm_action_single(&snd_pcm_action_stop, substream, 1157 SNDRV_PCM_STATE_SETUP); 1158 } 1159 1160 /** 1161 * snd_pcm_stop_xrun - stop the running streams as XRUN 1162 * @substream: the PCM substream instance 1163 * 1164 * This stops the given running substream (and all linked substreams) as XRUN. 1165 * Unlike snd_pcm_stop(), this function takes the substream lock by itself. 1166 * 1167 * Return: Zero if successful, or a negative error code. 1168 */ 1169 int snd_pcm_stop_xrun(struct snd_pcm_substream *substream) 1170 { 1171 unsigned long flags; 1172 int ret = 0; 1173 1174 snd_pcm_stream_lock_irqsave(substream, flags); 1175 if (snd_pcm_running(substream)) 1176 ret = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); 1177 snd_pcm_stream_unlock_irqrestore(substream, flags); 1178 return ret; 1179 } 1180 EXPORT_SYMBOL_GPL(snd_pcm_stop_xrun); 1181 1182 /* 1183 * pause callbacks 1184 */ 1185 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push) 1186 { 1187 struct snd_pcm_runtime *runtime = substream->runtime; 1188 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE)) 1189 return -ENOSYS; 1190 if (push) { 1191 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING) 1192 return -EBADFD; 1193 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED) 1194 return -EBADFD; 1195 runtime->trigger_master = substream; 1196 return 0; 1197 } 1198 1199 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push) 1200 { 1201 if (substream->runtime->trigger_master != substream) 1202 return 0; 1203 /* some drivers might use hw_ptr to recover from the pause - 1204 update the hw_ptr now */ 1205 if (push) 1206 snd_pcm_update_hw_ptr(substream); 1207 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by 1208 * a delta between the current jiffies, this gives a large enough 1209 * delta, effectively to skip the check once. 1210 */ 1211 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000; 1212 return substream->ops->trigger(substream, 1213 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH : 1214 SNDRV_PCM_TRIGGER_PAUSE_RELEASE); 1215 } 1216 1217 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push) 1218 { 1219 if (substream->runtime->trigger_master == substream) 1220 substream->ops->trigger(substream, 1221 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE : 1222 SNDRV_PCM_TRIGGER_PAUSE_PUSH); 1223 } 1224 1225 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push) 1226 { 1227 struct snd_pcm_runtime *runtime = substream->runtime; 1228 snd_pcm_trigger_tstamp(substream); 1229 if (push) { 1230 runtime->status->state = SNDRV_PCM_STATE_PAUSED; 1231 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MPAUSE); 1232 wake_up(&runtime->sleep); 1233 wake_up(&runtime->tsleep); 1234 } else { 1235 runtime->status->state = SNDRV_PCM_STATE_RUNNING; 1236 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MCONTINUE); 1237 } 1238 } 1239 1240 static const struct action_ops snd_pcm_action_pause = { 1241 .pre_action = snd_pcm_pre_pause, 1242 .do_action = snd_pcm_do_pause, 1243 .undo_action = snd_pcm_undo_pause, 1244 .post_action = snd_pcm_post_pause 1245 }; 1246 1247 /* 1248 * Push/release the pause for all linked streams. 1249 */ 1250 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push) 1251 { 1252 return snd_pcm_action(&snd_pcm_action_pause, substream, push); 1253 } 1254 1255 #ifdef CONFIG_PM 1256 /* suspend */ 1257 1258 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state) 1259 { 1260 struct snd_pcm_runtime *runtime = substream->runtime; 1261 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1262 return -EBUSY; 1263 runtime->trigger_master = substream; 1264 return 0; 1265 } 1266 1267 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state) 1268 { 1269 struct snd_pcm_runtime *runtime = substream->runtime; 1270 if (runtime->trigger_master != substream) 1271 return 0; 1272 if (! snd_pcm_running(substream)) 1273 return 0; 1274 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); 1275 return 0; /* suspend unconditionally */ 1276 } 1277 1278 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state) 1279 { 1280 struct snd_pcm_runtime *runtime = substream->runtime; 1281 snd_pcm_trigger_tstamp(substream); 1282 runtime->status->suspended_state = runtime->status->state; 1283 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED; 1284 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSUSPEND); 1285 wake_up(&runtime->sleep); 1286 wake_up(&runtime->tsleep); 1287 } 1288 1289 static const struct action_ops snd_pcm_action_suspend = { 1290 .pre_action = snd_pcm_pre_suspend, 1291 .do_action = snd_pcm_do_suspend, 1292 .post_action = snd_pcm_post_suspend 1293 }; 1294 1295 /** 1296 * snd_pcm_suspend - trigger SUSPEND to all linked streams 1297 * @substream: the PCM substream 1298 * 1299 * After this call, all streams are changed to SUSPENDED state. 1300 * 1301 * Return: Zero if successful (or @substream is %NULL), or a negative error 1302 * code. 1303 */ 1304 int snd_pcm_suspend(struct snd_pcm_substream *substream) 1305 { 1306 int err; 1307 unsigned long flags; 1308 1309 if (! substream) 1310 return 0; 1311 1312 snd_pcm_stream_lock_irqsave(substream, flags); 1313 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0); 1314 snd_pcm_stream_unlock_irqrestore(substream, flags); 1315 return err; 1316 } 1317 1318 EXPORT_SYMBOL(snd_pcm_suspend); 1319 1320 /** 1321 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm 1322 * @pcm: the PCM instance 1323 * 1324 * After this call, all streams are changed to SUSPENDED state. 1325 * 1326 * Return: Zero if successful (or @pcm is %NULL), or a negative error code. 1327 */ 1328 int snd_pcm_suspend_all(struct snd_pcm *pcm) 1329 { 1330 struct snd_pcm_substream *substream; 1331 int stream, err = 0; 1332 1333 if (! pcm) 1334 return 0; 1335 1336 for (stream = 0; stream < 2; stream++) { 1337 for (substream = pcm->streams[stream].substream; 1338 substream; substream = substream->next) { 1339 /* FIXME: the open/close code should lock this as well */ 1340 if (substream->runtime == NULL) 1341 continue; 1342 err = snd_pcm_suspend(substream); 1343 if (err < 0 && err != -EBUSY) 1344 return err; 1345 } 1346 } 1347 return 0; 1348 } 1349 1350 EXPORT_SYMBOL(snd_pcm_suspend_all); 1351 1352 /* resume */ 1353 1354 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state) 1355 { 1356 struct snd_pcm_runtime *runtime = substream->runtime; 1357 if (!(runtime->info & SNDRV_PCM_INFO_RESUME)) 1358 return -ENOSYS; 1359 runtime->trigger_master = substream; 1360 return 0; 1361 } 1362 1363 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state) 1364 { 1365 struct snd_pcm_runtime *runtime = substream->runtime; 1366 if (runtime->trigger_master != substream) 1367 return 0; 1368 /* DMA not running previously? */ 1369 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING && 1370 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING || 1371 substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) 1372 return 0; 1373 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME); 1374 } 1375 1376 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state) 1377 { 1378 if (substream->runtime->trigger_master == substream && 1379 snd_pcm_running(substream)) 1380 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); 1381 } 1382 1383 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state) 1384 { 1385 struct snd_pcm_runtime *runtime = substream->runtime; 1386 snd_pcm_trigger_tstamp(substream); 1387 runtime->status->state = runtime->status->suspended_state; 1388 snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MRESUME); 1389 } 1390 1391 static const struct action_ops snd_pcm_action_resume = { 1392 .pre_action = snd_pcm_pre_resume, 1393 .do_action = snd_pcm_do_resume, 1394 .undo_action = snd_pcm_undo_resume, 1395 .post_action = snd_pcm_post_resume 1396 }; 1397 1398 static int snd_pcm_resume(struct snd_pcm_substream *substream) 1399 { 1400 struct snd_card *card = substream->pcm->card; 1401 int res; 1402 1403 snd_power_lock(card); 1404 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) 1405 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0); 1406 snd_power_unlock(card); 1407 return res; 1408 } 1409 1410 #else 1411 1412 static int snd_pcm_resume(struct snd_pcm_substream *substream) 1413 { 1414 return -ENOSYS; 1415 } 1416 1417 #endif /* CONFIG_PM */ 1418 1419 /* 1420 * xrun ioctl 1421 * 1422 * Change the RUNNING stream(s) to XRUN state. 1423 */ 1424 static int snd_pcm_xrun(struct snd_pcm_substream *substream) 1425 { 1426 struct snd_card *card = substream->pcm->card; 1427 struct snd_pcm_runtime *runtime = substream->runtime; 1428 int result; 1429 1430 snd_power_lock(card); 1431 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1432 result = snd_power_wait(card, SNDRV_CTL_POWER_D0); 1433 if (result < 0) 1434 goto _unlock; 1435 } 1436 1437 snd_pcm_stream_lock_irq(substream); 1438 switch (runtime->status->state) { 1439 case SNDRV_PCM_STATE_XRUN: 1440 result = 0; /* already there */ 1441 break; 1442 case SNDRV_PCM_STATE_RUNNING: 1443 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); 1444 break; 1445 default: 1446 result = -EBADFD; 1447 } 1448 snd_pcm_stream_unlock_irq(substream); 1449 _unlock: 1450 snd_power_unlock(card); 1451 return result; 1452 } 1453 1454 /* 1455 * reset ioctl 1456 */ 1457 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state) 1458 { 1459 struct snd_pcm_runtime *runtime = substream->runtime; 1460 switch (runtime->status->state) { 1461 case SNDRV_PCM_STATE_RUNNING: 1462 case SNDRV_PCM_STATE_PREPARED: 1463 case SNDRV_PCM_STATE_PAUSED: 1464 case SNDRV_PCM_STATE_SUSPENDED: 1465 return 0; 1466 default: 1467 return -EBADFD; 1468 } 1469 } 1470 1471 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state) 1472 { 1473 struct snd_pcm_runtime *runtime = substream->runtime; 1474 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL); 1475 if (err < 0) 1476 return err; 1477 runtime->hw_ptr_base = 0; 1478 runtime->hw_ptr_interrupt = runtime->status->hw_ptr - 1479 runtime->status->hw_ptr % runtime->period_size; 1480 runtime->silence_start = runtime->status->hw_ptr; 1481 runtime->silence_filled = 0; 1482 return 0; 1483 } 1484 1485 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state) 1486 { 1487 struct snd_pcm_runtime *runtime = substream->runtime; 1488 runtime->control->appl_ptr = runtime->status->hw_ptr; 1489 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 1490 runtime->silence_size > 0) 1491 snd_pcm_playback_silence(substream, ULONG_MAX); 1492 } 1493 1494 static const struct action_ops snd_pcm_action_reset = { 1495 .pre_action = snd_pcm_pre_reset, 1496 .do_action = snd_pcm_do_reset, 1497 .post_action = snd_pcm_post_reset 1498 }; 1499 1500 static int snd_pcm_reset(struct snd_pcm_substream *substream) 1501 { 1502 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0); 1503 } 1504 1505 /* 1506 * prepare ioctl 1507 */ 1508 /* we use the second argument for updating f_flags */ 1509 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream, 1510 int f_flags) 1511 { 1512 struct snd_pcm_runtime *runtime = substream->runtime; 1513 if (runtime->status->state == SNDRV_PCM_STATE_OPEN || 1514 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED) 1515 return -EBADFD; 1516 if (snd_pcm_running(substream)) 1517 return -EBUSY; 1518 substream->f_flags = f_flags; 1519 return 0; 1520 } 1521 1522 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state) 1523 { 1524 int err; 1525 err = substream->ops->prepare(substream); 1526 if (err < 0) 1527 return err; 1528 return snd_pcm_do_reset(substream, 0); 1529 } 1530 1531 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state) 1532 { 1533 struct snd_pcm_runtime *runtime = substream->runtime; 1534 runtime->control->appl_ptr = runtime->status->hw_ptr; 1535 snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED); 1536 } 1537 1538 static const struct action_ops snd_pcm_action_prepare = { 1539 .pre_action = snd_pcm_pre_prepare, 1540 .do_action = snd_pcm_do_prepare, 1541 .post_action = snd_pcm_post_prepare 1542 }; 1543 1544 /** 1545 * snd_pcm_prepare - prepare the PCM substream to be triggerable 1546 * @substream: the PCM substream instance 1547 * @file: file to refer f_flags 1548 * 1549 * Return: Zero if successful, or a negative error code. 1550 */ 1551 static int snd_pcm_prepare(struct snd_pcm_substream *substream, 1552 struct file *file) 1553 { 1554 int res; 1555 struct snd_card *card = substream->pcm->card; 1556 int f_flags; 1557 1558 if (file) 1559 f_flags = file->f_flags; 1560 else 1561 f_flags = substream->f_flags; 1562 1563 snd_power_lock(card); 1564 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) 1565 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare, 1566 substream, f_flags); 1567 snd_power_unlock(card); 1568 return res; 1569 } 1570 1571 /* 1572 * drain ioctl 1573 */ 1574 1575 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state) 1576 { 1577 struct snd_pcm_runtime *runtime = substream->runtime; 1578 switch (runtime->status->state) { 1579 case SNDRV_PCM_STATE_OPEN: 1580 case SNDRV_PCM_STATE_DISCONNECTED: 1581 case SNDRV_PCM_STATE_SUSPENDED: 1582 return -EBADFD; 1583 } 1584 runtime->trigger_master = substream; 1585 return 0; 1586 } 1587 1588 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state) 1589 { 1590 struct snd_pcm_runtime *runtime = substream->runtime; 1591 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 1592 switch (runtime->status->state) { 1593 case SNDRV_PCM_STATE_PREPARED: 1594 /* start playback stream if possible */ 1595 if (! snd_pcm_playback_empty(substream)) { 1596 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING); 1597 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING); 1598 } else { 1599 runtime->status->state = SNDRV_PCM_STATE_SETUP; 1600 } 1601 break; 1602 case SNDRV_PCM_STATE_RUNNING: 1603 runtime->status->state = SNDRV_PCM_STATE_DRAINING; 1604 break; 1605 case SNDRV_PCM_STATE_XRUN: 1606 runtime->status->state = SNDRV_PCM_STATE_SETUP; 1607 break; 1608 default: 1609 break; 1610 } 1611 } else { 1612 /* stop running stream */ 1613 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) { 1614 int new_state = snd_pcm_capture_avail(runtime) > 0 ? 1615 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP; 1616 snd_pcm_do_stop(substream, new_state); 1617 snd_pcm_post_stop(substream, new_state); 1618 } 1619 } 1620 1621 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING && 1622 runtime->trigger_master == substream && 1623 (runtime->hw.info & SNDRV_PCM_INFO_DRAIN_TRIGGER)) 1624 return substream->ops->trigger(substream, 1625 SNDRV_PCM_TRIGGER_DRAIN); 1626 1627 return 0; 1628 } 1629 1630 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state) 1631 { 1632 } 1633 1634 static const struct action_ops snd_pcm_action_drain_init = { 1635 .pre_action = snd_pcm_pre_drain_init, 1636 .do_action = snd_pcm_do_drain_init, 1637 .post_action = snd_pcm_post_drain_init 1638 }; 1639 1640 static int snd_pcm_drop(struct snd_pcm_substream *substream); 1641 1642 /* 1643 * Drain the stream(s). 1644 * When the substream is linked, sync until the draining of all playback streams 1645 * is finished. 1646 * After this call, all streams are supposed to be either SETUP or DRAINING 1647 * (capture only) state. 1648 */ 1649 static int snd_pcm_drain(struct snd_pcm_substream *substream, 1650 struct file *file) 1651 { 1652 struct snd_card *card; 1653 struct snd_pcm_runtime *runtime; 1654 struct snd_pcm_substream *s; 1655 wait_queue_entry_t wait; 1656 int result = 0; 1657 int nonblock = 0; 1658 1659 card = substream->pcm->card; 1660 runtime = substream->runtime; 1661 1662 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 1663 return -EBADFD; 1664 1665 snd_power_lock(card); 1666 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1667 result = snd_power_wait(card, SNDRV_CTL_POWER_D0); 1668 if (result < 0) { 1669 snd_power_unlock(card); 1670 return result; 1671 } 1672 } 1673 1674 if (file) { 1675 if (file->f_flags & O_NONBLOCK) 1676 nonblock = 1; 1677 } else if (substream->f_flags & O_NONBLOCK) 1678 nonblock = 1; 1679 1680 down_read(&snd_pcm_link_rwsem); 1681 snd_pcm_stream_lock_irq(substream); 1682 /* resume pause */ 1683 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) 1684 snd_pcm_pause(substream, 0); 1685 1686 /* pre-start/stop - all running streams are changed to DRAINING state */ 1687 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0); 1688 if (result < 0) 1689 goto unlock; 1690 /* in non-blocking, we don't wait in ioctl but let caller poll */ 1691 if (nonblock) { 1692 result = -EAGAIN; 1693 goto unlock; 1694 } 1695 1696 for (;;) { 1697 long tout; 1698 struct snd_pcm_runtime *to_check; 1699 if (signal_pending(current)) { 1700 result = -ERESTARTSYS; 1701 break; 1702 } 1703 /* find a substream to drain */ 1704 to_check = NULL; 1705 snd_pcm_group_for_each_entry(s, substream) { 1706 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK) 1707 continue; 1708 runtime = s->runtime; 1709 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 1710 to_check = runtime; 1711 break; 1712 } 1713 } 1714 if (!to_check) 1715 break; /* all drained */ 1716 init_waitqueue_entry(&wait, current); 1717 add_wait_queue(&to_check->sleep, &wait); 1718 snd_pcm_stream_unlock_irq(substream); 1719 up_read(&snd_pcm_link_rwsem); 1720 snd_power_unlock(card); 1721 if (runtime->no_period_wakeup) 1722 tout = MAX_SCHEDULE_TIMEOUT; 1723 else { 1724 tout = 10; 1725 if (runtime->rate) { 1726 long t = runtime->period_size * 2 / runtime->rate; 1727 tout = max(t, tout); 1728 } 1729 tout = msecs_to_jiffies(tout * 1000); 1730 } 1731 tout = schedule_timeout_interruptible(tout); 1732 snd_power_lock(card); 1733 down_read(&snd_pcm_link_rwsem); 1734 snd_pcm_stream_lock_irq(substream); 1735 remove_wait_queue(&to_check->sleep, &wait); 1736 if (card->shutdown) { 1737 result = -ENODEV; 1738 break; 1739 } 1740 if (tout == 0) { 1741 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1742 result = -ESTRPIPE; 1743 else { 1744 dev_dbg(substream->pcm->card->dev, 1745 "playback drain error (DMA or IRQ trouble?)\n"); 1746 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1747 result = -EIO; 1748 } 1749 break; 1750 } 1751 } 1752 1753 unlock: 1754 snd_pcm_stream_unlock_irq(substream); 1755 up_read(&snd_pcm_link_rwsem); 1756 snd_power_unlock(card); 1757 1758 return result; 1759 } 1760 1761 /* 1762 * drop ioctl 1763 * 1764 * Immediately put all linked substreams into SETUP state. 1765 */ 1766 static int snd_pcm_drop(struct snd_pcm_substream *substream) 1767 { 1768 struct snd_pcm_runtime *runtime; 1769 int result = 0; 1770 1771 if (PCM_RUNTIME_CHECK(substream)) 1772 return -ENXIO; 1773 runtime = substream->runtime; 1774 1775 if (runtime->status->state == SNDRV_PCM_STATE_OPEN || 1776 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED || 1777 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1778 return -EBADFD; 1779 1780 snd_pcm_stream_lock_irq(substream); 1781 /* resume pause */ 1782 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) 1783 snd_pcm_pause(substream, 0); 1784 1785 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1786 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */ 1787 snd_pcm_stream_unlock_irq(substream); 1788 1789 return result; 1790 } 1791 1792 1793 static bool is_pcm_file(struct file *file) 1794 { 1795 struct inode *inode = file_inode(file); 1796 unsigned int minor; 1797 1798 if (!S_ISCHR(inode->i_mode) || imajor(inode) != snd_major) 1799 return false; 1800 minor = iminor(inode); 1801 return snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) || 1802 snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE); 1803 } 1804 1805 /* 1806 * PCM link handling 1807 */ 1808 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd) 1809 { 1810 int res = 0; 1811 struct snd_pcm_file *pcm_file; 1812 struct snd_pcm_substream *substream1; 1813 struct snd_pcm_group *group; 1814 struct fd f = fdget(fd); 1815 1816 if (!f.file) 1817 return -EBADFD; 1818 if (!is_pcm_file(f.file)) { 1819 res = -EBADFD; 1820 goto _badf; 1821 } 1822 pcm_file = f.file->private_data; 1823 substream1 = pcm_file->substream; 1824 group = kmalloc(sizeof(*group), GFP_KERNEL); 1825 if (!group) { 1826 res = -ENOMEM; 1827 goto _nolock; 1828 } 1829 down_write_nonblock(&snd_pcm_link_rwsem); 1830 write_lock_irq(&snd_pcm_link_rwlock); 1831 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN || 1832 substream->runtime->status->state != substream1->runtime->status->state || 1833 substream->pcm->nonatomic != substream1->pcm->nonatomic) { 1834 res = -EBADFD; 1835 goto _end; 1836 } 1837 if (snd_pcm_stream_linked(substream1)) { 1838 res = -EALREADY; 1839 goto _end; 1840 } 1841 if (!snd_pcm_stream_linked(substream)) { 1842 substream->group = group; 1843 group = NULL; 1844 spin_lock_init(&substream->group->lock); 1845 mutex_init(&substream->group->mutex); 1846 INIT_LIST_HEAD(&substream->group->substreams); 1847 list_add_tail(&substream->link_list, &substream->group->substreams); 1848 substream->group->count = 1; 1849 } 1850 list_add_tail(&substream1->link_list, &substream->group->substreams); 1851 substream->group->count++; 1852 substream1->group = substream->group; 1853 _end: 1854 write_unlock_irq(&snd_pcm_link_rwlock); 1855 up_write(&snd_pcm_link_rwsem); 1856 _nolock: 1857 snd_card_unref(substream1->pcm->card); 1858 kfree(group); 1859 _badf: 1860 fdput(f); 1861 return res; 1862 } 1863 1864 static void relink_to_local(struct snd_pcm_substream *substream) 1865 { 1866 substream->group = &substream->self_group; 1867 INIT_LIST_HEAD(&substream->self_group.substreams); 1868 list_add_tail(&substream->link_list, &substream->self_group.substreams); 1869 } 1870 1871 static int snd_pcm_unlink(struct snd_pcm_substream *substream) 1872 { 1873 struct snd_pcm_substream *s; 1874 int res = 0; 1875 1876 down_write_nonblock(&snd_pcm_link_rwsem); 1877 write_lock_irq(&snd_pcm_link_rwlock); 1878 if (!snd_pcm_stream_linked(substream)) { 1879 res = -EALREADY; 1880 goto _end; 1881 } 1882 list_del(&substream->link_list); 1883 substream->group->count--; 1884 if (substream->group->count == 1) { /* detach the last stream, too */ 1885 snd_pcm_group_for_each_entry(s, substream) { 1886 relink_to_local(s); 1887 break; 1888 } 1889 kfree(substream->group); 1890 } 1891 relink_to_local(substream); 1892 _end: 1893 write_unlock_irq(&snd_pcm_link_rwlock); 1894 up_write(&snd_pcm_link_rwsem); 1895 return res; 1896 } 1897 1898 /* 1899 * hw configurator 1900 */ 1901 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params, 1902 struct snd_pcm_hw_rule *rule) 1903 { 1904 struct snd_interval t; 1905 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]), 1906 hw_param_interval_c(params, rule->deps[1]), &t); 1907 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1908 } 1909 1910 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params, 1911 struct snd_pcm_hw_rule *rule) 1912 { 1913 struct snd_interval t; 1914 snd_interval_div(hw_param_interval_c(params, rule->deps[0]), 1915 hw_param_interval_c(params, rule->deps[1]), &t); 1916 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1917 } 1918 1919 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params, 1920 struct snd_pcm_hw_rule *rule) 1921 { 1922 struct snd_interval t; 1923 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]), 1924 hw_param_interval_c(params, rule->deps[1]), 1925 (unsigned long) rule->private, &t); 1926 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1927 } 1928 1929 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params, 1930 struct snd_pcm_hw_rule *rule) 1931 { 1932 struct snd_interval t; 1933 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]), 1934 (unsigned long) rule->private, 1935 hw_param_interval_c(params, rule->deps[1]), &t); 1936 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1937 } 1938 1939 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params, 1940 struct snd_pcm_hw_rule *rule) 1941 { 1942 unsigned int k; 1943 struct snd_interval *i = hw_param_interval(params, rule->deps[0]); 1944 struct snd_mask m; 1945 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 1946 snd_mask_any(&m); 1947 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { 1948 int bits; 1949 if (! snd_mask_test(mask, k)) 1950 continue; 1951 bits = snd_pcm_format_physical_width(k); 1952 if (bits <= 0) 1953 continue; /* ignore invalid formats */ 1954 if ((unsigned)bits < i->min || (unsigned)bits > i->max) 1955 snd_mask_reset(&m, k); 1956 } 1957 return snd_mask_refine(mask, &m); 1958 } 1959 1960 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params, 1961 struct snd_pcm_hw_rule *rule) 1962 { 1963 struct snd_interval t; 1964 unsigned int k; 1965 t.min = UINT_MAX; 1966 t.max = 0; 1967 t.openmin = 0; 1968 t.openmax = 0; 1969 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { 1970 int bits; 1971 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k)) 1972 continue; 1973 bits = snd_pcm_format_physical_width(k); 1974 if (bits <= 0) 1975 continue; /* ignore invalid formats */ 1976 if (t.min > (unsigned)bits) 1977 t.min = bits; 1978 if (t.max < (unsigned)bits) 1979 t.max = bits; 1980 } 1981 t.integer = 1; 1982 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1983 } 1984 1985 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12 1986 #error "Change this table" 1987 #endif 1988 1989 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100, 1990 48000, 64000, 88200, 96000, 176400, 192000 }; 1991 1992 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = { 1993 .count = ARRAY_SIZE(rates), 1994 .list = rates, 1995 }; 1996 1997 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params, 1998 struct snd_pcm_hw_rule *rule) 1999 { 2000 struct snd_pcm_hardware *hw = rule->private; 2001 return snd_interval_list(hw_param_interval(params, rule->var), 2002 snd_pcm_known_rates.count, 2003 snd_pcm_known_rates.list, hw->rates); 2004 } 2005 2006 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params, 2007 struct snd_pcm_hw_rule *rule) 2008 { 2009 struct snd_interval t; 2010 struct snd_pcm_substream *substream = rule->private; 2011 t.min = 0; 2012 t.max = substream->buffer_bytes_max; 2013 t.openmin = 0; 2014 t.openmax = 0; 2015 t.integer = 1; 2016 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 2017 } 2018 2019 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream) 2020 { 2021 struct snd_pcm_runtime *runtime = substream->runtime; 2022 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; 2023 int k, err; 2024 2025 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { 2026 snd_mask_any(constrs_mask(constrs, k)); 2027 } 2028 2029 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { 2030 snd_interval_any(constrs_interval(constrs, k)); 2031 } 2032 2033 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS)); 2034 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)); 2035 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)); 2036 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)); 2037 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS)); 2038 2039 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, 2040 snd_pcm_hw_rule_format, NULL, 2041 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 2042 if (err < 0) 2043 return err; 2044 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 2045 snd_pcm_hw_rule_sample_bits, NULL, 2046 SNDRV_PCM_HW_PARAM_FORMAT, 2047 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 2048 if (err < 0) 2049 return err; 2050 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 2051 snd_pcm_hw_rule_div, NULL, 2052 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); 2053 if (err < 0) 2054 return err; 2055 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 2056 snd_pcm_hw_rule_mul, NULL, 2057 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); 2058 if (err < 0) 2059 return err; 2060 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 2061 snd_pcm_hw_rule_mulkdiv, (void*) 8, 2062 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 2063 if (err < 0) 2064 return err; 2065 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 2066 snd_pcm_hw_rule_mulkdiv, (void*) 8, 2067 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1); 2068 if (err < 0) 2069 return err; 2070 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 2071 snd_pcm_hw_rule_div, NULL, 2072 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 2073 if (err < 0) 2074 return err; 2075 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 2076 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 2077 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1); 2078 if (err < 0) 2079 return err; 2080 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 2081 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 2082 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1); 2083 if (err < 0) 2084 return err; 2085 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, 2086 snd_pcm_hw_rule_div, NULL, 2087 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 2088 if (err < 0) 2089 return err; 2090 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 2091 snd_pcm_hw_rule_div, NULL, 2092 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); 2093 if (err < 0) 2094 return err; 2095 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 2096 snd_pcm_hw_rule_mulkdiv, (void*) 8, 2097 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 2098 if (err < 0) 2099 return err; 2100 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 2101 snd_pcm_hw_rule_muldivk, (void*) 1000000, 2102 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); 2103 if (err < 0) 2104 return err; 2105 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 2106 snd_pcm_hw_rule_mul, NULL, 2107 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); 2108 if (err < 0) 2109 return err; 2110 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 2111 snd_pcm_hw_rule_mulkdiv, (void*) 8, 2112 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 2113 if (err < 0) 2114 return err; 2115 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 2116 snd_pcm_hw_rule_muldivk, (void*) 1000000, 2117 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); 2118 if (err < 0) 2119 return err; 2120 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 2121 snd_pcm_hw_rule_muldivk, (void*) 8, 2122 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 2123 if (err < 0) 2124 return err; 2125 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 2126 snd_pcm_hw_rule_muldivk, (void*) 8, 2127 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 2128 if (err < 0) 2129 return err; 2130 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 2131 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 2132 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); 2133 if (err < 0) 2134 return err; 2135 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME, 2136 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 2137 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); 2138 if (err < 0) 2139 return err; 2140 return 0; 2141 } 2142 2143 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream) 2144 { 2145 struct snd_pcm_runtime *runtime = substream->runtime; 2146 struct snd_pcm_hardware *hw = &runtime->hw; 2147 int err; 2148 unsigned int mask = 0; 2149 2150 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) 2151 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED; 2152 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) 2153 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED; 2154 if (hw_support_mmap(substream)) { 2155 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) 2156 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; 2157 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) 2158 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED; 2159 if (hw->info & SNDRV_PCM_INFO_COMPLEX) 2160 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX; 2161 } 2162 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask); 2163 if (err < 0) 2164 return err; 2165 2166 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats); 2167 if (err < 0) 2168 return err; 2169 2170 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD); 2171 if (err < 0) 2172 return err; 2173 2174 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, 2175 hw->channels_min, hw->channels_max); 2176 if (err < 0) 2177 return err; 2178 2179 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE, 2180 hw->rate_min, hw->rate_max); 2181 if (err < 0) 2182 return err; 2183 2184 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 2185 hw->period_bytes_min, hw->period_bytes_max); 2186 if (err < 0) 2187 return err; 2188 2189 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS, 2190 hw->periods_min, hw->periods_max); 2191 if (err < 0) 2192 return err; 2193 2194 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 2195 hw->period_bytes_min, hw->buffer_bytes_max); 2196 if (err < 0) 2197 return err; 2198 2199 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 2200 snd_pcm_hw_rule_buffer_bytes_max, substream, 2201 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1); 2202 if (err < 0) 2203 return err; 2204 2205 /* FIXME: remove */ 2206 if (runtime->dma_bytes) { 2207 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes); 2208 if (err < 0) 2209 return err; 2210 } 2211 2212 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) { 2213 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 2214 snd_pcm_hw_rule_rate, hw, 2215 SNDRV_PCM_HW_PARAM_RATE, -1); 2216 if (err < 0) 2217 return err; 2218 } 2219 2220 /* FIXME: this belong to lowlevel */ 2221 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE); 2222 2223 return 0; 2224 } 2225 2226 static void pcm_release_private(struct snd_pcm_substream *substream) 2227 { 2228 snd_pcm_unlink(substream); 2229 } 2230 2231 void snd_pcm_release_substream(struct snd_pcm_substream *substream) 2232 { 2233 substream->ref_count--; 2234 if (substream->ref_count > 0) 2235 return; 2236 2237 snd_pcm_drop(substream); 2238 if (substream->hw_opened) { 2239 if (substream->ops->hw_free && 2240 substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) 2241 substream->ops->hw_free(substream); 2242 substream->ops->close(substream); 2243 substream->hw_opened = 0; 2244 } 2245 if (pm_qos_request_active(&substream->latency_pm_qos_req)) 2246 pm_qos_remove_request(&substream->latency_pm_qos_req); 2247 if (substream->pcm_release) { 2248 substream->pcm_release(substream); 2249 substream->pcm_release = NULL; 2250 } 2251 snd_pcm_detach_substream(substream); 2252 } 2253 2254 EXPORT_SYMBOL(snd_pcm_release_substream); 2255 2256 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, 2257 struct file *file, 2258 struct snd_pcm_substream **rsubstream) 2259 { 2260 struct snd_pcm_substream *substream; 2261 int err; 2262 2263 err = snd_pcm_attach_substream(pcm, stream, file, &substream); 2264 if (err < 0) 2265 return err; 2266 if (substream->ref_count > 1) { 2267 *rsubstream = substream; 2268 return 0; 2269 } 2270 2271 err = snd_pcm_hw_constraints_init(substream); 2272 if (err < 0) { 2273 pcm_dbg(pcm, "snd_pcm_hw_constraints_init failed\n"); 2274 goto error; 2275 } 2276 2277 if ((err = substream->ops->open(substream)) < 0) 2278 goto error; 2279 2280 substream->hw_opened = 1; 2281 2282 err = snd_pcm_hw_constraints_complete(substream); 2283 if (err < 0) { 2284 pcm_dbg(pcm, "snd_pcm_hw_constraints_complete failed\n"); 2285 goto error; 2286 } 2287 2288 *rsubstream = substream; 2289 return 0; 2290 2291 error: 2292 snd_pcm_release_substream(substream); 2293 return err; 2294 } 2295 2296 EXPORT_SYMBOL(snd_pcm_open_substream); 2297 2298 static int snd_pcm_open_file(struct file *file, 2299 struct snd_pcm *pcm, 2300 int stream) 2301 { 2302 struct snd_pcm_file *pcm_file; 2303 struct snd_pcm_substream *substream; 2304 int err; 2305 2306 err = snd_pcm_open_substream(pcm, stream, file, &substream); 2307 if (err < 0) 2308 return err; 2309 2310 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL); 2311 if (pcm_file == NULL) { 2312 snd_pcm_release_substream(substream); 2313 return -ENOMEM; 2314 } 2315 pcm_file->substream = substream; 2316 if (substream->ref_count == 1) { 2317 substream->file = pcm_file; 2318 substream->pcm_release = pcm_release_private; 2319 } 2320 file->private_data = pcm_file; 2321 2322 return 0; 2323 } 2324 2325 static int snd_pcm_playback_open(struct inode *inode, struct file *file) 2326 { 2327 struct snd_pcm *pcm; 2328 int err = nonseekable_open(inode, file); 2329 if (err < 0) 2330 return err; 2331 pcm = snd_lookup_minor_data(iminor(inode), 2332 SNDRV_DEVICE_TYPE_PCM_PLAYBACK); 2333 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK); 2334 if (pcm) 2335 snd_card_unref(pcm->card); 2336 return err; 2337 } 2338 2339 static int snd_pcm_capture_open(struct inode *inode, struct file *file) 2340 { 2341 struct snd_pcm *pcm; 2342 int err = nonseekable_open(inode, file); 2343 if (err < 0) 2344 return err; 2345 pcm = snd_lookup_minor_data(iminor(inode), 2346 SNDRV_DEVICE_TYPE_PCM_CAPTURE); 2347 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE); 2348 if (pcm) 2349 snd_card_unref(pcm->card); 2350 return err; 2351 } 2352 2353 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream) 2354 { 2355 int err; 2356 wait_queue_entry_t wait; 2357 2358 if (pcm == NULL) { 2359 err = -ENODEV; 2360 goto __error1; 2361 } 2362 err = snd_card_file_add(pcm->card, file); 2363 if (err < 0) 2364 goto __error1; 2365 if (!try_module_get(pcm->card->module)) { 2366 err = -EFAULT; 2367 goto __error2; 2368 } 2369 init_waitqueue_entry(&wait, current); 2370 add_wait_queue(&pcm->open_wait, &wait); 2371 mutex_lock(&pcm->open_mutex); 2372 while (1) { 2373 err = snd_pcm_open_file(file, pcm, stream); 2374 if (err >= 0) 2375 break; 2376 if (err == -EAGAIN) { 2377 if (file->f_flags & O_NONBLOCK) { 2378 err = -EBUSY; 2379 break; 2380 } 2381 } else 2382 break; 2383 set_current_state(TASK_INTERRUPTIBLE); 2384 mutex_unlock(&pcm->open_mutex); 2385 schedule(); 2386 mutex_lock(&pcm->open_mutex); 2387 if (pcm->card->shutdown) { 2388 err = -ENODEV; 2389 break; 2390 } 2391 if (signal_pending(current)) { 2392 err = -ERESTARTSYS; 2393 break; 2394 } 2395 } 2396 remove_wait_queue(&pcm->open_wait, &wait); 2397 mutex_unlock(&pcm->open_mutex); 2398 if (err < 0) 2399 goto __error; 2400 return err; 2401 2402 __error: 2403 module_put(pcm->card->module); 2404 __error2: 2405 snd_card_file_remove(pcm->card, file); 2406 __error1: 2407 return err; 2408 } 2409 2410 static int snd_pcm_release(struct inode *inode, struct file *file) 2411 { 2412 struct snd_pcm *pcm; 2413 struct snd_pcm_substream *substream; 2414 struct snd_pcm_file *pcm_file; 2415 2416 pcm_file = file->private_data; 2417 substream = pcm_file->substream; 2418 if (snd_BUG_ON(!substream)) 2419 return -ENXIO; 2420 pcm = substream->pcm; 2421 mutex_lock(&pcm->open_mutex); 2422 snd_pcm_release_substream(substream); 2423 kfree(pcm_file); 2424 mutex_unlock(&pcm->open_mutex); 2425 wake_up(&pcm->open_wait); 2426 module_put(pcm->card->module); 2427 snd_card_file_remove(pcm->card, file); 2428 return 0; 2429 } 2430 2431 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream, 2432 snd_pcm_uframes_t frames) 2433 { 2434 struct snd_pcm_runtime *runtime = substream->runtime; 2435 snd_pcm_sframes_t appl_ptr; 2436 snd_pcm_sframes_t ret; 2437 snd_pcm_sframes_t hw_avail; 2438 2439 if (frames == 0) 2440 return 0; 2441 2442 snd_pcm_stream_lock_irq(substream); 2443 switch (runtime->status->state) { 2444 case SNDRV_PCM_STATE_PREPARED: 2445 break; 2446 case SNDRV_PCM_STATE_DRAINING: 2447 case SNDRV_PCM_STATE_RUNNING: 2448 if (snd_pcm_update_hw_ptr(substream) >= 0) 2449 break; 2450 /* Fall through */ 2451 case SNDRV_PCM_STATE_XRUN: 2452 ret = -EPIPE; 2453 goto __end; 2454 case SNDRV_PCM_STATE_SUSPENDED: 2455 ret = -ESTRPIPE; 2456 goto __end; 2457 default: 2458 ret = -EBADFD; 2459 goto __end; 2460 } 2461 2462 hw_avail = snd_pcm_playback_hw_avail(runtime); 2463 if (hw_avail <= 0) { 2464 ret = 0; 2465 goto __end; 2466 } 2467 if (frames > (snd_pcm_uframes_t)hw_avail) 2468 frames = hw_avail; 2469 appl_ptr = runtime->control->appl_ptr - frames; 2470 if (appl_ptr < 0) 2471 appl_ptr += runtime->boundary; 2472 runtime->control->appl_ptr = appl_ptr; 2473 ret = frames; 2474 __end: 2475 snd_pcm_stream_unlock_irq(substream); 2476 return ret; 2477 } 2478 2479 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream, 2480 snd_pcm_uframes_t frames) 2481 { 2482 struct snd_pcm_runtime *runtime = substream->runtime; 2483 snd_pcm_sframes_t appl_ptr; 2484 snd_pcm_sframes_t ret; 2485 snd_pcm_sframes_t hw_avail; 2486 2487 if (frames == 0) 2488 return 0; 2489 2490 snd_pcm_stream_lock_irq(substream); 2491 switch (runtime->status->state) { 2492 case SNDRV_PCM_STATE_PREPARED: 2493 case SNDRV_PCM_STATE_DRAINING: 2494 break; 2495 case SNDRV_PCM_STATE_RUNNING: 2496 if (snd_pcm_update_hw_ptr(substream) >= 0) 2497 break; 2498 /* Fall through */ 2499 case SNDRV_PCM_STATE_XRUN: 2500 ret = -EPIPE; 2501 goto __end; 2502 case SNDRV_PCM_STATE_SUSPENDED: 2503 ret = -ESTRPIPE; 2504 goto __end; 2505 default: 2506 ret = -EBADFD; 2507 goto __end; 2508 } 2509 2510 hw_avail = snd_pcm_capture_hw_avail(runtime); 2511 if (hw_avail <= 0) { 2512 ret = 0; 2513 goto __end; 2514 } 2515 if (frames > (snd_pcm_uframes_t)hw_avail) 2516 frames = hw_avail; 2517 appl_ptr = runtime->control->appl_ptr - frames; 2518 if (appl_ptr < 0) 2519 appl_ptr += runtime->boundary; 2520 runtime->control->appl_ptr = appl_ptr; 2521 ret = frames; 2522 __end: 2523 snd_pcm_stream_unlock_irq(substream); 2524 return ret; 2525 } 2526 2527 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream, 2528 snd_pcm_uframes_t frames) 2529 { 2530 struct snd_pcm_runtime *runtime = substream->runtime; 2531 snd_pcm_sframes_t appl_ptr; 2532 snd_pcm_sframes_t ret; 2533 snd_pcm_sframes_t avail; 2534 2535 if (frames == 0) 2536 return 0; 2537 2538 snd_pcm_stream_lock_irq(substream); 2539 switch (runtime->status->state) { 2540 case SNDRV_PCM_STATE_PREPARED: 2541 case SNDRV_PCM_STATE_PAUSED: 2542 break; 2543 case SNDRV_PCM_STATE_DRAINING: 2544 case SNDRV_PCM_STATE_RUNNING: 2545 if (snd_pcm_update_hw_ptr(substream) >= 0) 2546 break; 2547 /* Fall through */ 2548 case SNDRV_PCM_STATE_XRUN: 2549 ret = -EPIPE; 2550 goto __end; 2551 case SNDRV_PCM_STATE_SUSPENDED: 2552 ret = -ESTRPIPE; 2553 goto __end; 2554 default: 2555 ret = -EBADFD; 2556 goto __end; 2557 } 2558 2559 avail = snd_pcm_playback_avail(runtime); 2560 if (avail <= 0) { 2561 ret = 0; 2562 goto __end; 2563 } 2564 if (frames > (snd_pcm_uframes_t)avail) 2565 frames = avail; 2566 appl_ptr = runtime->control->appl_ptr + frames; 2567 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) 2568 appl_ptr -= runtime->boundary; 2569 runtime->control->appl_ptr = appl_ptr; 2570 ret = frames; 2571 __end: 2572 snd_pcm_stream_unlock_irq(substream); 2573 return ret; 2574 } 2575 2576 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream, 2577 snd_pcm_uframes_t frames) 2578 { 2579 struct snd_pcm_runtime *runtime = substream->runtime; 2580 snd_pcm_sframes_t appl_ptr; 2581 snd_pcm_sframes_t ret; 2582 snd_pcm_sframes_t avail; 2583 2584 if (frames == 0) 2585 return 0; 2586 2587 snd_pcm_stream_lock_irq(substream); 2588 switch (runtime->status->state) { 2589 case SNDRV_PCM_STATE_PREPARED: 2590 case SNDRV_PCM_STATE_DRAINING: 2591 case SNDRV_PCM_STATE_PAUSED: 2592 break; 2593 case SNDRV_PCM_STATE_RUNNING: 2594 if (snd_pcm_update_hw_ptr(substream) >= 0) 2595 break; 2596 /* Fall through */ 2597 case SNDRV_PCM_STATE_XRUN: 2598 ret = -EPIPE; 2599 goto __end; 2600 case SNDRV_PCM_STATE_SUSPENDED: 2601 ret = -ESTRPIPE; 2602 goto __end; 2603 default: 2604 ret = -EBADFD; 2605 goto __end; 2606 } 2607 2608 avail = snd_pcm_capture_avail(runtime); 2609 if (avail <= 0) { 2610 ret = 0; 2611 goto __end; 2612 } 2613 if (frames > (snd_pcm_uframes_t)avail) 2614 frames = avail; 2615 appl_ptr = runtime->control->appl_ptr + frames; 2616 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) 2617 appl_ptr -= runtime->boundary; 2618 runtime->control->appl_ptr = appl_ptr; 2619 ret = frames; 2620 __end: 2621 snd_pcm_stream_unlock_irq(substream); 2622 return ret; 2623 } 2624 2625 static int snd_pcm_hwsync(struct snd_pcm_substream *substream) 2626 { 2627 struct snd_pcm_runtime *runtime = substream->runtime; 2628 int err; 2629 2630 snd_pcm_stream_lock_irq(substream); 2631 switch (runtime->status->state) { 2632 case SNDRV_PCM_STATE_DRAINING: 2633 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 2634 goto __badfd; 2635 /* Fall through */ 2636 case SNDRV_PCM_STATE_RUNNING: 2637 if ((err = snd_pcm_update_hw_ptr(substream)) < 0) 2638 break; 2639 /* Fall through */ 2640 case SNDRV_PCM_STATE_PREPARED: 2641 err = 0; 2642 break; 2643 case SNDRV_PCM_STATE_SUSPENDED: 2644 err = -ESTRPIPE; 2645 break; 2646 case SNDRV_PCM_STATE_XRUN: 2647 err = -EPIPE; 2648 break; 2649 default: 2650 __badfd: 2651 err = -EBADFD; 2652 break; 2653 } 2654 snd_pcm_stream_unlock_irq(substream); 2655 return err; 2656 } 2657 2658 static int snd_pcm_delay(struct snd_pcm_substream *substream, 2659 snd_pcm_sframes_t __user *res) 2660 { 2661 struct snd_pcm_runtime *runtime = substream->runtime; 2662 int err; 2663 snd_pcm_sframes_t n = 0; 2664 2665 snd_pcm_stream_lock_irq(substream); 2666 switch (runtime->status->state) { 2667 case SNDRV_PCM_STATE_DRAINING: 2668 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 2669 goto __badfd; 2670 /* Fall through */ 2671 case SNDRV_PCM_STATE_RUNNING: 2672 if ((err = snd_pcm_update_hw_ptr(substream)) < 0) 2673 break; 2674 /* Fall through */ 2675 case SNDRV_PCM_STATE_PREPARED: 2676 case SNDRV_PCM_STATE_SUSPENDED: 2677 err = 0; 2678 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2679 n = snd_pcm_playback_hw_avail(runtime); 2680 else 2681 n = snd_pcm_capture_avail(runtime); 2682 n += runtime->delay; 2683 break; 2684 case SNDRV_PCM_STATE_XRUN: 2685 err = -EPIPE; 2686 break; 2687 default: 2688 __badfd: 2689 err = -EBADFD; 2690 break; 2691 } 2692 snd_pcm_stream_unlock_irq(substream); 2693 if (!err) 2694 if (put_user(n, res)) 2695 err = -EFAULT; 2696 return err; 2697 } 2698 2699 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream, 2700 struct snd_pcm_sync_ptr __user *_sync_ptr) 2701 { 2702 struct snd_pcm_runtime *runtime = substream->runtime; 2703 struct snd_pcm_sync_ptr sync_ptr; 2704 volatile struct snd_pcm_mmap_status *status; 2705 volatile struct snd_pcm_mmap_control *control; 2706 int err; 2707 2708 memset(&sync_ptr, 0, sizeof(sync_ptr)); 2709 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags))) 2710 return -EFAULT; 2711 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control))) 2712 return -EFAULT; 2713 status = runtime->status; 2714 control = runtime->control; 2715 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) { 2716 err = snd_pcm_hwsync(substream); 2717 if (err < 0) 2718 return err; 2719 } 2720 snd_pcm_stream_lock_irq(substream); 2721 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) 2722 control->appl_ptr = sync_ptr.c.control.appl_ptr; 2723 else 2724 sync_ptr.c.control.appl_ptr = control->appl_ptr; 2725 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) 2726 control->avail_min = sync_ptr.c.control.avail_min; 2727 else 2728 sync_ptr.c.control.avail_min = control->avail_min; 2729 sync_ptr.s.status.state = status->state; 2730 sync_ptr.s.status.hw_ptr = status->hw_ptr; 2731 sync_ptr.s.status.tstamp = status->tstamp; 2732 sync_ptr.s.status.suspended_state = status->suspended_state; 2733 snd_pcm_stream_unlock_irq(substream); 2734 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr))) 2735 return -EFAULT; 2736 return 0; 2737 } 2738 2739 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg) 2740 { 2741 struct snd_pcm_runtime *runtime = substream->runtime; 2742 int arg; 2743 2744 if (get_user(arg, _arg)) 2745 return -EFAULT; 2746 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST) 2747 return -EINVAL; 2748 runtime->tstamp_type = arg; 2749 return 0; 2750 } 2751 2752 static int snd_pcm_common_ioctl1(struct file *file, 2753 struct snd_pcm_substream *substream, 2754 unsigned int cmd, void __user *arg) 2755 { 2756 switch (cmd) { 2757 case SNDRV_PCM_IOCTL_PVERSION: 2758 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0; 2759 case SNDRV_PCM_IOCTL_INFO: 2760 return snd_pcm_info_user(substream, arg); 2761 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */ 2762 return 0; 2763 case SNDRV_PCM_IOCTL_TTSTAMP: 2764 return snd_pcm_tstamp(substream, arg); 2765 case SNDRV_PCM_IOCTL_HW_REFINE: 2766 return snd_pcm_hw_refine_user(substream, arg); 2767 case SNDRV_PCM_IOCTL_HW_PARAMS: 2768 return snd_pcm_hw_params_user(substream, arg); 2769 case SNDRV_PCM_IOCTL_HW_FREE: 2770 return snd_pcm_hw_free(substream); 2771 case SNDRV_PCM_IOCTL_SW_PARAMS: 2772 return snd_pcm_sw_params_user(substream, arg); 2773 case SNDRV_PCM_IOCTL_STATUS: 2774 return snd_pcm_status_user(substream, arg, false); 2775 case SNDRV_PCM_IOCTL_STATUS_EXT: 2776 return snd_pcm_status_user(substream, arg, true); 2777 case SNDRV_PCM_IOCTL_CHANNEL_INFO: 2778 return snd_pcm_channel_info_user(substream, arg); 2779 case SNDRV_PCM_IOCTL_PREPARE: 2780 return snd_pcm_prepare(substream, file); 2781 case SNDRV_PCM_IOCTL_RESET: 2782 return snd_pcm_reset(substream); 2783 case SNDRV_PCM_IOCTL_START: 2784 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING); 2785 case SNDRV_PCM_IOCTL_LINK: 2786 return snd_pcm_link(substream, (int)(unsigned long) arg); 2787 case SNDRV_PCM_IOCTL_UNLINK: 2788 return snd_pcm_unlink(substream); 2789 case SNDRV_PCM_IOCTL_RESUME: 2790 return snd_pcm_resume(substream); 2791 case SNDRV_PCM_IOCTL_XRUN: 2792 return snd_pcm_xrun(substream); 2793 case SNDRV_PCM_IOCTL_HWSYNC: 2794 return snd_pcm_hwsync(substream); 2795 case SNDRV_PCM_IOCTL_DELAY: 2796 return snd_pcm_delay(substream, arg); 2797 case SNDRV_PCM_IOCTL_SYNC_PTR: 2798 return snd_pcm_sync_ptr(substream, arg); 2799 #ifdef CONFIG_SND_SUPPORT_OLD_API 2800 case SNDRV_PCM_IOCTL_HW_REFINE_OLD: 2801 return snd_pcm_hw_refine_old_user(substream, arg); 2802 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD: 2803 return snd_pcm_hw_params_old_user(substream, arg); 2804 #endif 2805 case SNDRV_PCM_IOCTL_DRAIN: 2806 return snd_pcm_drain(substream, file); 2807 case SNDRV_PCM_IOCTL_DROP: 2808 return snd_pcm_drop(substream); 2809 case SNDRV_PCM_IOCTL_PAUSE: 2810 { 2811 int res; 2812 snd_pcm_stream_lock_irq(substream); 2813 res = snd_pcm_pause(substream, (int)(unsigned long)arg); 2814 snd_pcm_stream_unlock_irq(substream); 2815 return res; 2816 } 2817 } 2818 pcm_dbg(substream->pcm, "unknown ioctl = 0x%x\n", cmd); 2819 return -ENOTTY; 2820 } 2821 2822 static int snd_pcm_playback_ioctl1(struct file *file, 2823 struct snd_pcm_substream *substream, 2824 unsigned int cmd, void __user *arg) 2825 { 2826 if (snd_BUG_ON(!substream)) 2827 return -ENXIO; 2828 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) 2829 return -EINVAL; 2830 switch (cmd) { 2831 case SNDRV_PCM_IOCTL_WRITEI_FRAMES: 2832 { 2833 struct snd_xferi xferi; 2834 struct snd_xferi __user *_xferi = arg; 2835 struct snd_pcm_runtime *runtime = substream->runtime; 2836 snd_pcm_sframes_t result; 2837 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2838 return -EBADFD; 2839 if (put_user(0, &_xferi->result)) 2840 return -EFAULT; 2841 if (copy_from_user(&xferi, _xferi, sizeof(xferi))) 2842 return -EFAULT; 2843 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames); 2844 __put_user(result, &_xferi->result); 2845 return result < 0 ? result : 0; 2846 } 2847 case SNDRV_PCM_IOCTL_WRITEN_FRAMES: 2848 { 2849 struct snd_xfern xfern; 2850 struct snd_xfern __user *_xfern = arg; 2851 struct snd_pcm_runtime *runtime = substream->runtime; 2852 void __user **bufs; 2853 snd_pcm_sframes_t result; 2854 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2855 return -EBADFD; 2856 if (runtime->channels > 128) 2857 return -EINVAL; 2858 if (put_user(0, &_xfern->result)) 2859 return -EFAULT; 2860 if (copy_from_user(&xfern, _xfern, sizeof(xfern))) 2861 return -EFAULT; 2862 2863 bufs = memdup_user(xfern.bufs, 2864 sizeof(void *) * runtime->channels); 2865 if (IS_ERR(bufs)) 2866 return PTR_ERR(bufs); 2867 result = snd_pcm_lib_writev(substream, bufs, xfern.frames); 2868 kfree(bufs); 2869 __put_user(result, &_xfern->result); 2870 return result < 0 ? result : 0; 2871 } 2872 case SNDRV_PCM_IOCTL_REWIND: 2873 { 2874 snd_pcm_uframes_t frames; 2875 snd_pcm_uframes_t __user *_frames = arg; 2876 snd_pcm_sframes_t result; 2877 if (get_user(frames, _frames)) 2878 return -EFAULT; 2879 if (put_user(0, _frames)) 2880 return -EFAULT; 2881 result = snd_pcm_playback_rewind(substream, frames); 2882 __put_user(result, _frames); 2883 return result < 0 ? result : 0; 2884 } 2885 case SNDRV_PCM_IOCTL_FORWARD: 2886 { 2887 snd_pcm_uframes_t frames; 2888 snd_pcm_uframes_t __user *_frames = arg; 2889 snd_pcm_sframes_t result; 2890 if (get_user(frames, _frames)) 2891 return -EFAULT; 2892 if (put_user(0, _frames)) 2893 return -EFAULT; 2894 result = snd_pcm_playback_forward(substream, frames); 2895 __put_user(result, _frames); 2896 return result < 0 ? result : 0; 2897 } 2898 } 2899 return snd_pcm_common_ioctl1(file, substream, cmd, arg); 2900 } 2901 2902 static int snd_pcm_capture_ioctl1(struct file *file, 2903 struct snd_pcm_substream *substream, 2904 unsigned int cmd, void __user *arg) 2905 { 2906 if (snd_BUG_ON(!substream)) 2907 return -ENXIO; 2908 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE)) 2909 return -EINVAL; 2910 switch (cmd) { 2911 case SNDRV_PCM_IOCTL_READI_FRAMES: 2912 { 2913 struct snd_xferi xferi; 2914 struct snd_xferi __user *_xferi = arg; 2915 struct snd_pcm_runtime *runtime = substream->runtime; 2916 snd_pcm_sframes_t result; 2917 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2918 return -EBADFD; 2919 if (put_user(0, &_xferi->result)) 2920 return -EFAULT; 2921 if (copy_from_user(&xferi, _xferi, sizeof(xferi))) 2922 return -EFAULT; 2923 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames); 2924 __put_user(result, &_xferi->result); 2925 return result < 0 ? result : 0; 2926 } 2927 case SNDRV_PCM_IOCTL_READN_FRAMES: 2928 { 2929 struct snd_xfern xfern; 2930 struct snd_xfern __user *_xfern = arg; 2931 struct snd_pcm_runtime *runtime = substream->runtime; 2932 void *bufs; 2933 snd_pcm_sframes_t result; 2934 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2935 return -EBADFD; 2936 if (runtime->channels > 128) 2937 return -EINVAL; 2938 if (put_user(0, &_xfern->result)) 2939 return -EFAULT; 2940 if (copy_from_user(&xfern, _xfern, sizeof(xfern))) 2941 return -EFAULT; 2942 2943 bufs = memdup_user(xfern.bufs, 2944 sizeof(void *) * runtime->channels); 2945 if (IS_ERR(bufs)) 2946 return PTR_ERR(bufs); 2947 result = snd_pcm_lib_readv(substream, bufs, xfern.frames); 2948 kfree(bufs); 2949 __put_user(result, &_xfern->result); 2950 return result < 0 ? result : 0; 2951 } 2952 case SNDRV_PCM_IOCTL_REWIND: 2953 { 2954 snd_pcm_uframes_t frames; 2955 snd_pcm_uframes_t __user *_frames = arg; 2956 snd_pcm_sframes_t result; 2957 if (get_user(frames, _frames)) 2958 return -EFAULT; 2959 if (put_user(0, _frames)) 2960 return -EFAULT; 2961 result = snd_pcm_capture_rewind(substream, frames); 2962 __put_user(result, _frames); 2963 return result < 0 ? result : 0; 2964 } 2965 case SNDRV_PCM_IOCTL_FORWARD: 2966 { 2967 snd_pcm_uframes_t frames; 2968 snd_pcm_uframes_t __user *_frames = arg; 2969 snd_pcm_sframes_t result; 2970 if (get_user(frames, _frames)) 2971 return -EFAULT; 2972 if (put_user(0, _frames)) 2973 return -EFAULT; 2974 result = snd_pcm_capture_forward(substream, frames); 2975 __put_user(result, _frames); 2976 return result < 0 ? result : 0; 2977 } 2978 } 2979 return snd_pcm_common_ioctl1(file, substream, cmd, arg); 2980 } 2981 2982 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd, 2983 unsigned long arg) 2984 { 2985 struct snd_pcm_file *pcm_file; 2986 2987 pcm_file = file->private_data; 2988 2989 if (((cmd >> 8) & 0xff) != 'A') 2990 return -ENOTTY; 2991 2992 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd, 2993 (void __user *)arg); 2994 } 2995 2996 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd, 2997 unsigned long arg) 2998 { 2999 struct snd_pcm_file *pcm_file; 3000 3001 pcm_file = file->private_data; 3002 3003 if (((cmd >> 8) & 0xff) != 'A') 3004 return -ENOTTY; 3005 3006 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd, 3007 (void __user *)arg); 3008 } 3009 3010 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, 3011 unsigned int cmd, void *arg) 3012 { 3013 mm_segment_t fs; 3014 int result; 3015 3016 fs = snd_enter_user(); 3017 switch (substream->stream) { 3018 case SNDRV_PCM_STREAM_PLAYBACK: 3019 result = snd_pcm_playback_ioctl1(NULL, substream, cmd, 3020 (void __user *)arg); 3021 break; 3022 case SNDRV_PCM_STREAM_CAPTURE: 3023 result = snd_pcm_capture_ioctl1(NULL, substream, cmd, 3024 (void __user *)arg); 3025 break; 3026 default: 3027 result = -EINVAL; 3028 break; 3029 } 3030 snd_leave_user(fs); 3031 return result; 3032 } 3033 3034 EXPORT_SYMBOL(snd_pcm_kernel_ioctl); 3035 3036 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count, 3037 loff_t * offset) 3038 { 3039 struct snd_pcm_file *pcm_file; 3040 struct snd_pcm_substream *substream; 3041 struct snd_pcm_runtime *runtime; 3042 snd_pcm_sframes_t result; 3043 3044 pcm_file = file->private_data; 3045 substream = pcm_file->substream; 3046 if (PCM_RUNTIME_CHECK(substream)) 3047 return -ENXIO; 3048 runtime = substream->runtime; 3049 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 3050 return -EBADFD; 3051 if (!frame_aligned(runtime, count)) 3052 return -EINVAL; 3053 count = bytes_to_frames(runtime, count); 3054 result = snd_pcm_lib_read(substream, buf, count); 3055 if (result > 0) 3056 result = frames_to_bytes(runtime, result); 3057 return result; 3058 } 3059 3060 static ssize_t snd_pcm_write(struct file *file, const char __user *buf, 3061 size_t count, loff_t * offset) 3062 { 3063 struct snd_pcm_file *pcm_file; 3064 struct snd_pcm_substream *substream; 3065 struct snd_pcm_runtime *runtime; 3066 snd_pcm_sframes_t result; 3067 3068 pcm_file = file->private_data; 3069 substream = pcm_file->substream; 3070 if (PCM_RUNTIME_CHECK(substream)) 3071 return -ENXIO; 3072 runtime = substream->runtime; 3073 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 3074 return -EBADFD; 3075 if (!frame_aligned(runtime, count)) 3076 return -EINVAL; 3077 count = bytes_to_frames(runtime, count); 3078 result = snd_pcm_lib_write(substream, buf, count); 3079 if (result > 0) 3080 result = frames_to_bytes(runtime, result); 3081 return result; 3082 } 3083 3084 static ssize_t snd_pcm_readv(struct kiocb *iocb, struct iov_iter *to) 3085 { 3086 struct snd_pcm_file *pcm_file; 3087 struct snd_pcm_substream *substream; 3088 struct snd_pcm_runtime *runtime; 3089 snd_pcm_sframes_t result; 3090 unsigned long i; 3091 void __user **bufs; 3092 snd_pcm_uframes_t frames; 3093 3094 pcm_file = iocb->ki_filp->private_data; 3095 substream = pcm_file->substream; 3096 if (PCM_RUNTIME_CHECK(substream)) 3097 return -ENXIO; 3098 runtime = substream->runtime; 3099 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 3100 return -EBADFD; 3101 if (!iter_is_iovec(to)) 3102 return -EINVAL; 3103 if (to->nr_segs > 1024 || to->nr_segs != runtime->channels) 3104 return -EINVAL; 3105 if (!frame_aligned(runtime, to->iov->iov_len)) 3106 return -EINVAL; 3107 frames = bytes_to_samples(runtime, to->iov->iov_len); 3108 bufs = kmalloc(sizeof(void *) * to->nr_segs, GFP_KERNEL); 3109 if (bufs == NULL) 3110 return -ENOMEM; 3111 for (i = 0; i < to->nr_segs; ++i) 3112 bufs[i] = to->iov[i].iov_base; 3113 result = snd_pcm_lib_readv(substream, bufs, frames); 3114 if (result > 0) 3115 result = frames_to_bytes(runtime, result); 3116 kfree(bufs); 3117 return result; 3118 } 3119 3120 static ssize_t snd_pcm_writev(struct kiocb *iocb, struct iov_iter *from) 3121 { 3122 struct snd_pcm_file *pcm_file; 3123 struct snd_pcm_substream *substream; 3124 struct snd_pcm_runtime *runtime; 3125 snd_pcm_sframes_t result; 3126 unsigned long i; 3127 void __user **bufs; 3128 snd_pcm_uframes_t frames; 3129 3130 pcm_file = iocb->ki_filp->private_data; 3131 substream = pcm_file->substream; 3132 if (PCM_RUNTIME_CHECK(substream)) 3133 return -ENXIO; 3134 runtime = substream->runtime; 3135 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 3136 return -EBADFD; 3137 if (!iter_is_iovec(from)) 3138 return -EINVAL; 3139 if (from->nr_segs > 128 || from->nr_segs != runtime->channels || 3140 !frame_aligned(runtime, from->iov->iov_len)) 3141 return -EINVAL; 3142 frames = bytes_to_samples(runtime, from->iov->iov_len); 3143 bufs = kmalloc(sizeof(void *) * from->nr_segs, GFP_KERNEL); 3144 if (bufs == NULL) 3145 return -ENOMEM; 3146 for (i = 0; i < from->nr_segs; ++i) 3147 bufs[i] = from->iov[i].iov_base; 3148 result = snd_pcm_lib_writev(substream, bufs, frames); 3149 if (result > 0) 3150 result = frames_to_bytes(runtime, result); 3151 kfree(bufs); 3152 return result; 3153 } 3154 3155 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait) 3156 { 3157 struct snd_pcm_file *pcm_file; 3158 struct snd_pcm_substream *substream; 3159 struct snd_pcm_runtime *runtime; 3160 unsigned int mask; 3161 snd_pcm_uframes_t avail; 3162 3163 pcm_file = file->private_data; 3164 3165 substream = pcm_file->substream; 3166 if (PCM_RUNTIME_CHECK(substream)) 3167 return POLLOUT | POLLWRNORM | POLLERR; 3168 runtime = substream->runtime; 3169 3170 poll_wait(file, &runtime->sleep, wait); 3171 3172 snd_pcm_stream_lock_irq(substream); 3173 avail = snd_pcm_playback_avail(runtime); 3174 switch (runtime->status->state) { 3175 case SNDRV_PCM_STATE_RUNNING: 3176 case SNDRV_PCM_STATE_PREPARED: 3177 case SNDRV_PCM_STATE_PAUSED: 3178 if (avail >= runtime->control->avail_min) { 3179 mask = POLLOUT | POLLWRNORM; 3180 break; 3181 } 3182 /* Fall through */ 3183 case SNDRV_PCM_STATE_DRAINING: 3184 mask = 0; 3185 break; 3186 default: 3187 mask = POLLOUT | POLLWRNORM | POLLERR; 3188 break; 3189 } 3190 snd_pcm_stream_unlock_irq(substream); 3191 return mask; 3192 } 3193 3194 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait) 3195 { 3196 struct snd_pcm_file *pcm_file; 3197 struct snd_pcm_substream *substream; 3198 struct snd_pcm_runtime *runtime; 3199 unsigned int mask; 3200 snd_pcm_uframes_t avail; 3201 3202 pcm_file = file->private_data; 3203 3204 substream = pcm_file->substream; 3205 if (PCM_RUNTIME_CHECK(substream)) 3206 return POLLIN | POLLRDNORM | POLLERR; 3207 runtime = substream->runtime; 3208 3209 poll_wait(file, &runtime->sleep, wait); 3210 3211 snd_pcm_stream_lock_irq(substream); 3212 avail = snd_pcm_capture_avail(runtime); 3213 switch (runtime->status->state) { 3214 case SNDRV_PCM_STATE_RUNNING: 3215 case SNDRV_PCM_STATE_PREPARED: 3216 case SNDRV_PCM_STATE_PAUSED: 3217 if (avail >= runtime->control->avail_min) { 3218 mask = POLLIN | POLLRDNORM; 3219 break; 3220 } 3221 mask = 0; 3222 break; 3223 case SNDRV_PCM_STATE_DRAINING: 3224 if (avail > 0) { 3225 mask = POLLIN | POLLRDNORM; 3226 break; 3227 } 3228 /* Fall through */ 3229 default: 3230 mask = POLLIN | POLLRDNORM | POLLERR; 3231 break; 3232 } 3233 snd_pcm_stream_unlock_irq(substream); 3234 return mask; 3235 } 3236 3237 /* 3238 * mmap support 3239 */ 3240 3241 /* 3242 * Only on coherent architectures, we can mmap the status and the control records 3243 * for effcient data transfer. On others, we have to use HWSYNC ioctl... 3244 */ 3245 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) 3246 /* 3247 * mmap status record 3248 */ 3249 static int snd_pcm_mmap_status_fault(struct vm_fault *vmf) 3250 { 3251 struct snd_pcm_substream *substream = vmf->vma->vm_private_data; 3252 struct snd_pcm_runtime *runtime; 3253 3254 if (substream == NULL) 3255 return VM_FAULT_SIGBUS; 3256 runtime = substream->runtime; 3257 vmf->page = virt_to_page(runtime->status); 3258 get_page(vmf->page); 3259 return 0; 3260 } 3261 3262 static const struct vm_operations_struct snd_pcm_vm_ops_status = 3263 { 3264 .fault = snd_pcm_mmap_status_fault, 3265 }; 3266 3267 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, 3268 struct vm_area_struct *area) 3269 { 3270 long size; 3271 if (!(area->vm_flags & VM_READ)) 3272 return -EINVAL; 3273 size = area->vm_end - area->vm_start; 3274 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))) 3275 return -EINVAL; 3276 area->vm_ops = &snd_pcm_vm_ops_status; 3277 area->vm_private_data = substream; 3278 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; 3279 return 0; 3280 } 3281 3282 /* 3283 * mmap control record 3284 */ 3285 static int snd_pcm_mmap_control_fault(struct vm_fault *vmf) 3286 { 3287 struct snd_pcm_substream *substream = vmf->vma->vm_private_data; 3288 struct snd_pcm_runtime *runtime; 3289 3290 if (substream == NULL) 3291 return VM_FAULT_SIGBUS; 3292 runtime = substream->runtime; 3293 vmf->page = virt_to_page(runtime->control); 3294 get_page(vmf->page); 3295 return 0; 3296 } 3297 3298 static const struct vm_operations_struct snd_pcm_vm_ops_control = 3299 { 3300 .fault = snd_pcm_mmap_control_fault, 3301 }; 3302 3303 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, 3304 struct vm_area_struct *area) 3305 { 3306 long size; 3307 if (!(area->vm_flags & VM_READ)) 3308 return -EINVAL; 3309 size = area->vm_end - area->vm_start; 3310 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))) 3311 return -EINVAL; 3312 area->vm_ops = &snd_pcm_vm_ops_control; 3313 area->vm_private_data = substream; 3314 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; 3315 return 0; 3316 } 3317 #else /* ! coherent mmap */ 3318 /* 3319 * don't support mmap for status and control records. 3320 */ 3321 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, 3322 struct vm_area_struct *area) 3323 { 3324 return -ENXIO; 3325 } 3326 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, 3327 struct vm_area_struct *area) 3328 { 3329 return -ENXIO; 3330 } 3331 #endif /* coherent mmap */ 3332 3333 static inline struct page * 3334 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs) 3335 { 3336 void *vaddr = substream->runtime->dma_area + ofs; 3337 return virt_to_page(vaddr); 3338 } 3339 3340 /* 3341 * fault callback for mmapping a RAM page 3342 */ 3343 static int snd_pcm_mmap_data_fault(struct vm_fault *vmf) 3344 { 3345 struct snd_pcm_substream *substream = vmf->vma->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