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/file.h> 24#include <linux/slab.h> 25#include <linux/smp_lock.h> 26#include <linux/time.h> 27#include <linux/pm_qos_params.h> 28#include <linux/uio.h> 29#include <linux/dma-mapping.h> 30#include <sound/core.h> 31#include <sound/control.h> 32#include <sound/info.h> 33#include <sound/pcm.h> 34#include <sound/pcm_params.h> 35#include <sound/timer.h> 36#include <sound/minors.h> 37#include <asm/io.h> 38#if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT) 39#include <dma-coherence.h> 40#endif 41 42/* 43 * Compatibility 44 */ 45 46struct snd_pcm_hw_params_old { 47 unsigned int flags; 48 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT - 49 SNDRV_PCM_HW_PARAM_ACCESS + 1]; 50 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME - 51 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1]; 52 unsigned int rmask; 53 unsigned int cmask; 54 unsigned int info; 55 unsigned int msbits; 56 unsigned int rate_num; 57 unsigned int rate_den; 58 snd_pcm_uframes_t fifo_size; 59 unsigned char reserved[64]; 60}; 61 62#ifdef CONFIG_SND_SUPPORT_OLD_API 63#define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old) 64#define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old) 65 66static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, 67 struct snd_pcm_hw_params_old __user * _oparams); 68static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, 69 struct snd_pcm_hw_params_old __user * _oparams); 70#endif 71static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream); 72 73/* 74 * 75 */ 76 77DEFINE_RWLOCK(snd_pcm_link_rwlock); 78EXPORT_SYMBOL(snd_pcm_link_rwlock); 79 80static DECLARE_RWSEM(snd_pcm_link_rwsem); 81 82static inline mm_segment_t snd_enter_user(void) 83{ 84 mm_segment_t fs = get_fs(); 85 set_fs(get_ds()); 86 return fs; 87} 88 89static inline void snd_leave_user(mm_segment_t fs) 90{ 91 set_fs(fs); 92} 93 94 95 96int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info) 97{ 98 struct snd_pcm_runtime *runtime; 99 struct snd_pcm *pcm = substream->pcm; 100 struct snd_pcm_str *pstr = substream->pstr; 101 102 memset(info, 0, sizeof(*info)); 103 info->card = pcm->card->number; 104 info->device = pcm->device; 105 info->stream = substream->stream; 106 info->subdevice = substream->number; 107 strlcpy(info->id, pcm->id, sizeof(info->id)); 108 strlcpy(info->name, pcm->name, sizeof(info->name)); 109 info->dev_class = pcm->dev_class; 110 info->dev_subclass = pcm->dev_subclass; 111 info->subdevices_count = pstr->substream_count; 112 info->subdevices_avail = pstr->substream_count - pstr->substream_opened; 113 strlcpy(info->subname, substream->name, sizeof(info->subname)); 114 runtime = substream->runtime; 115 if (runtime) { 116 info->sync = runtime->sync; 117 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info); 118 } 119 return 0; 120} 121 122int snd_pcm_info_user(struct snd_pcm_substream *substream, 123 struct snd_pcm_info __user * _info) 124{ 125 struct snd_pcm_info *info; 126 int err; 127 128 info = kmalloc(sizeof(*info), GFP_KERNEL); 129 if (! info) 130 return -ENOMEM; 131 err = snd_pcm_info(substream, info); 132 if (err >= 0) { 133 if (copy_to_user(_info, info, sizeof(*info))) 134 err = -EFAULT; 135 } 136 kfree(info); 137 return err; 138} 139 140#undef RULES_DEBUG 141 142#ifdef RULES_DEBUG 143#define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v 144char *snd_pcm_hw_param_names[] = { 145 HW_PARAM(ACCESS), 146 HW_PARAM(FORMAT), 147 HW_PARAM(SUBFORMAT), 148 HW_PARAM(SAMPLE_BITS), 149 HW_PARAM(FRAME_BITS), 150 HW_PARAM(CHANNELS), 151 HW_PARAM(RATE), 152 HW_PARAM(PERIOD_TIME), 153 HW_PARAM(PERIOD_SIZE), 154 HW_PARAM(PERIOD_BYTES), 155 HW_PARAM(PERIODS), 156 HW_PARAM(BUFFER_TIME), 157 HW_PARAM(BUFFER_SIZE), 158 HW_PARAM(BUFFER_BYTES), 159 HW_PARAM(TICK_TIME), 160}; 161#endif 162 163int snd_pcm_hw_refine(struct snd_pcm_substream *substream, 164 struct snd_pcm_hw_params *params) 165{ 166 unsigned int k; 167 struct snd_pcm_hardware *hw; 168 struct snd_interval *i = NULL; 169 struct snd_mask *m = NULL; 170 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints; 171 unsigned int rstamps[constrs->rules_num]; 172 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1]; 173 unsigned int stamp = 2; 174 int changed, again; 175 176 params->info = 0; 177 params->fifo_size = 0; 178 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS)) 179 params->msbits = 0; 180 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) { 181 params->rate_num = 0; 182 params->rate_den = 0; 183 } 184 185 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { 186 m = hw_param_mask(params, k); 187 if (snd_mask_empty(m)) 188 return -EINVAL; 189 if (!(params->rmask & (1 << k))) 190 continue; 191#ifdef RULES_DEBUG 192 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]); 193 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); 194#endif 195 changed = snd_mask_refine(m, constrs_mask(constrs, k)); 196#ifdef RULES_DEBUG 197 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); 198#endif 199 if (changed) 200 params->cmask |= 1 << k; 201 if (changed < 0) 202 return changed; 203 } 204 205 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { 206 i = hw_param_interval(params, k); 207 if (snd_interval_empty(i)) 208 return -EINVAL; 209 if (!(params->rmask & (1 << k))) 210 continue; 211#ifdef RULES_DEBUG 212 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]); 213 if (i->empty) 214 printk("empty"); 215 else 216 printk("%c%u %u%c", 217 i->openmin ? '(' : '[', i->min, 218 i->max, i->openmax ? ')' : ']'); 219 printk(" -> "); 220#endif 221 changed = snd_interval_refine(i, constrs_interval(constrs, k)); 222#ifdef RULES_DEBUG 223 if (i->empty) 224 printk("empty\n"); 225 else 226 printk("%c%u %u%c\n", 227 i->openmin ? '(' : '[', i->min, 228 i->max, i->openmax ? ')' : ']'); 229#endif 230 if (changed) 231 params->cmask |= 1 << k; 232 if (changed < 0) 233 return changed; 234 } 235 236 for (k = 0; k < constrs->rules_num; k++) 237 rstamps[k] = 0; 238 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) 239 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0; 240 do { 241 again = 0; 242 for (k = 0; k < constrs->rules_num; k++) { 243 struct snd_pcm_hw_rule *r = &constrs->rules[k]; 244 unsigned int d; 245 int doit = 0; 246 if (r->cond && !(r->cond & params->flags)) 247 continue; 248 for (d = 0; r->deps[d] >= 0; d++) { 249 if (vstamps[r->deps[d]] > rstamps[k]) { 250 doit = 1; 251 break; 252 } 253 } 254 if (!doit) 255 continue; 256#ifdef RULES_DEBUG 257 printk(KERN_DEBUG "Rule %d [%p]: ", k, r->func); 258 if (r->var >= 0) { 259 printk("%s = ", snd_pcm_hw_param_names[r->var]); 260 if (hw_is_mask(r->var)) { 261 m = hw_param_mask(params, r->var); 262 printk("%x", *m->bits); 263 } else { 264 i = hw_param_interval(params, r->var); 265 if (i->empty) 266 printk("empty"); 267 else 268 printk("%c%u %u%c", 269 i->openmin ? '(' : '[', i->min, 270 i->max, i->openmax ? ')' : ']'); 271 } 272 } 273#endif 274 changed = r->func(params, r); 275#ifdef RULES_DEBUG 276 if (r->var >= 0) { 277 printk(" -> "); 278 if (hw_is_mask(r->var)) 279 printk("%x", *m->bits); 280 else { 281 if (i->empty) 282 printk("empty"); 283 else 284 printk("%c%u %u%c", 285 i->openmin ? '(' : '[', i->min, 286 i->max, i->openmax ? ')' : ']'); 287 } 288 } 289 printk("\n"); 290#endif 291 rstamps[k] = stamp; 292 if (changed && r->var >= 0) { 293 params->cmask |= (1 << r->var); 294 vstamps[r->var] = stamp; 295 again = 1; 296 } 297 if (changed < 0) 298 return changed; 299 stamp++; 300 } 301 } while (again); 302 if (!params->msbits) { 303 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); 304 if (snd_interval_single(i)) 305 params->msbits = snd_interval_value(i); 306 } 307 308 if (!params->rate_den) { 309 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); 310 if (snd_interval_single(i)) { 311 params->rate_num = snd_interval_value(i); 312 params->rate_den = 1; 313 } 314 } 315 316 hw = &substream->runtime->hw; 317 if (!params->info) 318 params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES; 319 if (!params->fifo_size) { 320 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 321 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 322 if (snd_mask_min(m) == snd_mask_max(m) && 323 snd_interval_min(i) == snd_interval_max(i)) { 324 changed = substream->ops->ioctl(substream, 325 SNDRV_PCM_IOCTL1_FIFO_SIZE, params); 326 if (changed < 0) 327 return changed; 328 } 329 } 330 params->rmask = 0; 331 return 0; 332} 333 334EXPORT_SYMBOL(snd_pcm_hw_refine); 335 336static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream, 337 struct snd_pcm_hw_params __user * _params) 338{ 339 struct snd_pcm_hw_params *params; 340 int err; 341 342 params = memdup_user(_params, sizeof(*params)); 343 if (IS_ERR(params)) 344 return PTR_ERR(params); 345 346 err = snd_pcm_hw_refine(substream, params); 347 if (copy_to_user(_params, params, sizeof(*params))) { 348 if (!err) 349 err = -EFAULT; 350 } 351 352 kfree(params); 353 return err; 354} 355 356static int period_to_usecs(struct snd_pcm_runtime *runtime) 357{ 358 int usecs; 359 360 if (! runtime->rate) 361 return -1; /* invalid */ 362 363 /* take 75% of period time as the deadline */ 364 usecs = (750000 / runtime->rate) * runtime->period_size; 365 usecs += ((750000 % runtime->rate) * runtime->period_size) / 366 runtime->rate; 367 368 return usecs; 369} 370 371static int snd_pcm_hw_params(struct snd_pcm_substream *substream, 372 struct snd_pcm_hw_params *params) 373{ 374 struct snd_pcm_runtime *runtime; 375 int err, usecs; 376 unsigned int bits; 377 snd_pcm_uframes_t frames; 378 379 if (PCM_RUNTIME_CHECK(substream)) 380 return -ENXIO; 381 runtime = substream->runtime; 382 snd_pcm_stream_lock_irq(substream); 383 switch (runtime->status->state) { 384 case SNDRV_PCM_STATE_OPEN: 385 case SNDRV_PCM_STATE_SETUP: 386 case SNDRV_PCM_STATE_PREPARED: 387 break; 388 default: 389 snd_pcm_stream_unlock_irq(substream); 390 return -EBADFD; 391 } 392 snd_pcm_stream_unlock_irq(substream); 393#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 394 if (!substream->oss.oss) 395#endif 396 if (atomic_read(&substream->mmap_count)) 397 return -EBADFD; 398 399 params->rmask = ~0U; 400 err = snd_pcm_hw_refine(substream, params); 401 if (err < 0) 402 goto _error; 403 404 err = snd_pcm_hw_params_choose(substream, params); 405 if (err < 0) 406 goto _error; 407 408 if (substream->ops->hw_params != NULL) { 409 err = substream->ops->hw_params(substream, params); 410 if (err < 0) 411 goto _error; 412 } 413 414 runtime->access = params_access(params); 415 runtime->format = params_format(params); 416 runtime->subformat = params_subformat(params); 417 runtime->channels = params_channels(params); 418 runtime->rate = params_rate(params); 419 runtime->period_size = params_period_size(params); 420 runtime->periods = params_periods(params); 421 runtime->buffer_size = params_buffer_size(params); 422 runtime->info = params->info; 423 runtime->rate_num = params->rate_num; 424 runtime->rate_den = params->rate_den; 425 426 bits = snd_pcm_format_physical_width(runtime->format); 427 runtime->sample_bits = bits; 428 bits *= runtime->channels; 429 runtime->frame_bits = bits; 430 frames = 1; 431 while (bits % 8 != 0) { 432 bits *= 2; 433 frames *= 2; 434 } 435 runtime->byte_align = bits / 8; 436 runtime->min_align = frames; 437 438 /* Default sw params */ 439 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; 440 runtime->period_step = 1; 441 runtime->control->avail_min = runtime->period_size; 442 runtime->start_threshold = 1; 443 runtime->stop_threshold = runtime->buffer_size; 444 runtime->silence_threshold = 0; 445 runtime->silence_size = 0; 446 runtime->boundary = runtime->buffer_size; 447 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size) 448 runtime->boundary *= 2; 449 450 snd_pcm_timer_resolution_change(substream); 451 runtime->status->state = SNDRV_PCM_STATE_SETUP; 452 453 if (pm_qos_request_active(&substream->latency_pm_qos_req)) 454 pm_qos_remove_request(&substream->latency_pm_qos_req); 455 if ((usecs = period_to_usecs(runtime)) >= 0) 456 pm_qos_add_request(&substream->latency_pm_qos_req, 457 PM_QOS_CPU_DMA_LATENCY, usecs); 458 return 0; 459 _error: 460 /* hardware might be unuseable from this time, 461 so we force application to retry to set 462 the correct hardware parameter settings */ 463 runtime->status->state = SNDRV_PCM_STATE_OPEN; 464 if (substream->ops->hw_free != NULL) 465 substream->ops->hw_free(substream); 466 return err; 467} 468 469static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream, 470 struct snd_pcm_hw_params __user * _params) 471{ 472 struct snd_pcm_hw_params *params; 473 int err; 474 475 params = memdup_user(_params, sizeof(*params)); 476 if (IS_ERR(params)) 477 return PTR_ERR(params); 478 479 err = snd_pcm_hw_params(substream, params); 480 if (copy_to_user(_params, params, sizeof(*params))) { 481 if (!err) 482 err = -EFAULT; 483 } 484 485 kfree(params); 486 return err; 487} 488 489static int snd_pcm_hw_free(struct snd_pcm_substream *substream) 490{ 491 struct snd_pcm_runtime *runtime; 492 int result = 0; 493 494 if (PCM_RUNTIME_CHECK(substream)) 495 return -ENXIO; 496 runtime = substream->runtime; 497 snd_pcm_stream_lock_irq(substream); 498 switch (runtime->status->state) { 499 case SNDRV_PCM_STATE_SETUP: 500 case SNDRV_PCM_STATE_PREPARED: 501 break; 502 default: 503 snd_pcm_stream_unlock_irq(substream); 504 return -EBADFD; 505 } 506 snd_pcm_stream_unlock_irq(substream); 507 if (atomic_read(&substream->mmap_count)) 508 return -EBADFD; 509 if (substream->ops->hw_free) 510 result = substream->ops->hw_free(substream); 511 runtime->status->state = SNDRV_PCM_STATE_OPEN; 512 pm_qos_remove_request(&substream->latency_pm_qos_req); 513 return result; 514} 515 516static int snd_pcm_sw_params(struct snd_pcm_substream *substream, 517 struct snd_pcm_sw_params *params) 518{ 519 struct snd_pcm_runtime *runtime; 520 int err; 521 522 if (PCM_RUNTIME_CHECK(substream)) 523 return -ENXIO; 524 runtime = substream->runtime; 525 snd_pcm_stream_lock_irq(substream); 526 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 527 snd_pcm_stream_unlock_irq(substream); 528 return -EBADFD; 529 } 530 snd_pcm_stream_unlock_irq(substream); 531 532 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST) 533 return -EINVAL; 534 if (params->avail_min == 0) 535 return -EINVAL; 536 if (params->silence_size >= runtime->boundary) { 537 if (params->silence_threshold != 0) 538 return -EINVAL; 539 } else { 540 if (params->silence_size > params->silence_threshold) 541 return -EINVAL; 542 if (params->silence_threshold > runtime->buffer_size) 543 return -EINVAL; 544 } 545 err = 0; 546 snd_pcm_stream_lock_irq(substream); 547 runtime->tstamp_mode = params->tstamp_mode; 548 runtime->period_step = params->period_step; 549 runtime->control->avail_min = params->avail_min; 550 runtime->start_threshold = params->start_threshold; 551 runtime->stop_threshold = params->stop_threshold; 552 runtime->silence_threshold = params->silence_threshold; 553 runtime->silence_size = params->silence_size; 554 params->boundary = runtime->boundary; 555 if (snd_pcm_running(substream)) { 556 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 557 runtime->silence_size > 0) 558 snd_pcm_playback_silence(substream, ULONG_MAX); 559 err = snd_pcm_update_state(substream, runtime); 560 } 561 snd_pcm_stream_unlock_irq(substream); 562 return err; 563} 564 565static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream, 566 struct snd_pcm_sw_params __user * _params) 567{ 568 struct snd_pcm_sw_params params; 569 int err; 570 if (copy_from_user(¶ms, _params, sizeof(params))) 571 return -EFAULT; 572 err = snd_pcm_sw_params(substream, ¶ms); 573 if (copy_to_user(_params, ¶ms, sizeof(params))) 574 return -EFAULT; 575 return err; 576} 577 578int snd_pcm_status(struct snd_pcm_substream *substream, 579 struct snd_pcm_status *status) 580{ 581 struct snd_pcm_runtime *runtime = substream->runtime; 582 583 snd_pcm_stream_lock_irq(substream); 584 status->state = runtime->status->state; 585 status->suspended_state = runtime->status->suspended_state; 586 if (status->state == SNDRV_PCM_STATE_OPEN) 587 goto _end; 588 status->trigger_tstamp = runtime->trigger_tstamp; 589 if (snd_pcm_running(substream)) { 590 snd_pcm_update_hw_ptr(substream); 591 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { 592 status->tstamp = runtime->status->tstamp; 593 goto _tstamp_end; 594 } 595 } 596 snd_pcm_gettime(runtime, &status->tstamp); 597 _tstamp_end: 598 status->appl_ptr = runtime->control->appl_ptr; 599 status->hw_ptr = runtime->status->hw_ptr; 600 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 601 status->avail = snd_pcm_playback_avail(runtime); 602 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING || 603 runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 604 status->delay = runtime->buffer_size - status->avail; 605 status->delay += runtime->delay; 606 } else 607 status->delay = 0; 608 } else { 609 status->avail = snd_pcm_capture_avail(runtime); 610 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) 611 status->delay = status->avail + runtime->delay; 612 else 613 status->delay = 0; 614 } 615 status->avail_max = runtime->avail_max; 616 status->overrange = runtime->overrange; 617 runtime->avail_max = 0; 618 runtime->overrange = 0; 619 _end: 620 snd_pcm_stream_unlock_irq(substream); 621 return 0; 622} 623 624static int snd_pcm_status_user(struct snd_pcm_substream *substream, 625 struct snd_pcm_status __user * _status) 626{ 627 struct snd_pcm_status status; 628 int res; 629 630 memset(&status, 0, sizeof(status)); 631 res = snd_pcm_status(substream, &status); 632 if (res < 0) 633 return res; 634 if (copy_to_user(_status, &status, sizeof(status))) 635 return -EFAULT; 636 return 0; 637} 638 639static int snd_pcm_channel_info(struct snd_pcm_substream *substream, 640 struct snd_pcm_channel_info * info) 641{ 642 struct snd_pcm_runtime *runtime; 643 unsigned int channel; 644 645 channel = info->channel; 646 runtime = substream->runtime; 647 snd_pcm_stream_lock_irq(substream); 648 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 649 snd_pcm_stream_unlock_irq(substream); 650 return -EBADFD; 651 } 652 snd_pcm_stream_unlock_irq(substream); 653 if (channel >= runtime->channels) 654 return -EINVAL; 655 memset(info, 0, sizeof(*info)); 656 info->channel = channel; 657 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info); 658} 659 660static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream, 661 struct snd_pcm_channel_info __user * _info) 662{ 663 struct snd_pcm_channel_info info; 664 int res; 665 666 if (copy_from_user(&info, _info, sizeof(info))) 667 return -EFAULT; 668 res = snd_pcm_channel_info(substream, &info); 669 if (res < 0) 670 return res; 671 if (copy_to_user(_info, &info, sizeof(info))) 672 return -EFAULT; 673 return 0; 674} 675 676static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream) 677{ 678 struct snd_pcm_runtime *runtime = substream->runtime; 679 if (runtime->trigger_master == NULL) 680 return; 681 if (runtime->trigger_master == substream) { 682 snd_pcm_gettime(runtime, &runtime->trigger_tstamp); 683 } else { 684 snd_pcm_trigger_tstamp(runtime->trigger_master); 685 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp; 686 } 687 runtime->trigger_master = NULL; 688} 689 690struct action_ops { 691 int (*pre_action)(struct snd_pcm_substream *substream, int state); 692 int (*do_action)(struct snd_pcm_substream *substream, int state); 693 void (*undo_action)(struct snd_pcm_substream *substream, int state); 694 void (*post_action)(struct snd_pcm_substream *substream, int state); 695}; 696 697/* 698 * this functions is core for handling of linked stream 699 * Note: the stream state might be changed also on failure 700 * Note2: call with calling stream lock + link lock 701 */ 702static int snd_pcm_action_group(struct action_ops *ops, 703 struct snd_pcm_substream *substream, 704 int state, int do_lock) 705{ 706 struct snd_pcm_substream *s = NULL; 707 struct snd_pcm_substream *s1; 708 int res = 0; 709 710 snd_pcm_group_for_each_entry(s, substream) { 711 if (do_lock && s != substream) 712 spin_lock_nested(&s->self_group.lock, 713 SINGLE_DEPTH_NESTING); 714 res = ops->pre_action(s, state); 715 if (res < 0) 716 goto _unlock; 717 } 718 snd_pcm_group_for_each_entry(s, substream) { 719 res = ops->do_action(s, state); 720 if (res < 0) { 721 if (ops->undo_action) { 722 snd_pcm_group_for_each_entry(s1, substream) { 723 if (s1 == s) /* failed stream */ 724 break; 725 ops->undo_action(s1, state); 726 } 727 } 728 s = NULL; /* unlock all */ 729 goto _unlock; 730 } 731 } 732 snd_pcm_group_for_each_entry(s, substream) { 733 ops->post_action(s, state); 734 } 735 _unlock: 736 if (do_lock) { 737 /* unlock streams */ 738 snd_pcm_group_for_each_entry(s1, substream) { 739 if (s1 != substream) 740 spin_unlock(&s1->self_group.lock); 741 if (s1 == s) /* end */ 742 break; 743 } 744 } 745 return res; 746} 747 748/* 749 * Note: call with stream lock 750 */ 751static int snd_pcm_action_single(struct action_ops *ops, 752 struct snd_pcm_substream *substream, 753 int state) 754{ 755 int res; 756 757 res = ops->pre_action(substream, state); 758 if (res < 0) 759 return res; 760 res = ops->do_action(substream, state); 761 if (res == 0) 762 ops->post_action(substream, state); 763 else if (ops->undo_action) 764 ops->undo_action(substream, state); 765 return res; 766} 767 768/* 769 * Note: call with stream lock 770 */ 771static int snd_pcm_action(struct action_ops *ops, 772 struct snd_pcm_substream *substream, 773 int state) 774{ 775 int res; 776 777 if (snd_pcm_stream_linked(substream)) { 778 if (!spin_trylock(&substream->group->lock)) { 779 spin_unlock(&substream->self_group.lock); 780 spin_lock(&substream->group->lock); 781 spin_lock(&substream->self_group.lock); 782 } 783 res = snd_pcm_action_group(ops, substream, state, 1); 784 spin_unlock(&substream->group->lock); 785 } else { 786 res = snd_pcm_action_single(ops, substream, state); 787 } 788 return res; 789} 790 791/* 792 * Note: don't use any locks before 793 */ 794static int snd_pcm_action_lock_irq(struct action_ops *ops, 795 struct snd_pcm_substream *substream, 796 int state) 797{ 798 int res; 799 800 read_lock_irq(&snd_pcm_link_rwlock); 801 if (snd_pcm_stream_linked(substream)) { 802 spin_lock(&substream->group->lock); 803 spin_lock(&substream->self_group.lock); 804 res = snd_pcm_action_group(ops, substream, state, 1); 805 spin_unlock(&substream->self_group.lock); 806 spin_unlock(&substream->group->lock); 807 } else { 808 spin_lock(&substream->self_group.lock); 809 res = snd_pcm_action_single(ops, substream, state); 810 spin_unlock(&substream->self_group.lock); 811 } 812 read_unlock_irq(&snd_pcm_link_rwlock); 813 return res; 814} 815 816/* 817 */ 818static int snd_pcm_action_nonatomic(struct action_ops *ops, 819 struct snd_pcm_substream *substream, 820 int state) 821{ 822 int res; 823 824 down_read(&snd_pcm_link_rwsem); 825 if (snd_pcm_stream_linked(substream)) 826 res = snd_pcm_action_group(ops, substream, state, 0); 827 else 828 res = snd_pcm_action_single(ops, substream, state); 829 up_read(&snd_pcm_link_rwsem); 830 return res; 831} 832 833/* 834 * start callbacks 835 */ 836static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state) 837{ 838 struct snd_pcm_runtime *runtime = substream->runtime; 839 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED) 840 return -EBADFD; 841 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 842 !snd_pcm_playback_data(substream)) 843 return -EPIPE; 844 runtime->trigger_master = substream; 845 return 0; 846} 847 848static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state) 849{ 850 if (substream->runtime->trigger_master != substream) 851 return 0; 852 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START); 853} 854 855static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state) 856{ 857 if (substream->runtime->trigger_master == substream) 858 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); 859} 860 861static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state) 862{ 863 struct snd_pcm_runtime *runtime = substream->runtime; 864 snd_pcm_trigger_tstamp(substream); 865 runtime->hw_ptr_jiffies = jiffies; 866 runtime->status->state = state; 867 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 868 runtime->silence_size > 0) 869 snd_pcm_playback_silence(substream, ULONG_MAX); 870 if (substream->timer) 871 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART, 872 &runtime->trigger_tstamp); 873} 874 875static struct action_ops snd_pcm_action_start = { 876 .pre_action = snd_pcm_pre_start, 877 .do_action = snd_pcm_do_start, 878 .undo_action = snd_pcm_undo_start, 879 .post_action = snd_pcm_post_start 880}; 881 882/** 883 * snd_pcm_start - start all linked streams 884 * @substream: the PCM substream instance 885 */ 886int snd_pcm_start(struct snd_pcm_substream *substream) 887{ 888 return snd_pcm_action(&snd_pcm_action_start, substream, 889 SNDRV_PCM_STATE_RUNNING); 890} 891 892/* 893 * stop callbacks 894 */ 895static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state) 896{ 897 struct snd_pcm_runtime *runtime = substream->runtime; 898 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 899 return -EBADFD; 900 runtime->trigger_master = substream; 901 return 0; 902} 903 904static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state) 905{ 906 if (substream->runtime->trigger_master == substream && 907 snd_pcm_running(substream)) 908 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); 909 return 0; /* unconditonally stop all substreams */ 910} 911 912static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state) 913{ 914 struct snd_pcm_runtime *runtime = substream->runtime; 915 if (runtime->status->state != state) { 916 snd_pcm_trigger_tstamp(substream); 917 if (substream->timer) 918 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP, 919 &runtime->trigger_tstamp); 920 runtime->status->state = state; 921 } 922 wake_up(&runtime->sleep); 923 wake_up(&runtime->tsleep); 924} 925 926static struct action_ops snd_pcm_action_stop = { 927 .pre_action = snd_pcm_pre_stop, 928 .do_action = snd_pcm_do_stop, 929 .post_action = snd_pcm_post_stop 930}; 931 932/** 933 * snd_pcm_stop - try to stop all running streams in the substream group 934 * @substream: the PCM substream instance 935 * @state: PCM state after stopping the stream 936 * 937 * The state of each stream is then changed to the given state unconditionally. 938 */ 939int snd_pcm_stop(struct snd_pcm_substream *substream, int state) 940{ 941 return snd_pcm_action(&snd_pcm_action_stop, substream, state); 942} 943 944EXPORT_SYMBOL(snd_pcm_stop); 945 946/** 947 * snd_pcm_drain_done - stop the DMA only when the given stream is playback 948 * @substream: the PCM substream 949 * 950 * After stopping, the state is changed to SETUP. 951 * Unlike snd_pcm_stop(), this affects only the given stream. 952 */ 953int snd_pcm_drain_done(struct snd_pcm_substream *substream) 954{ 955 return snd_pcm_action_single(&snd_pcm_action_stop, substream, 956 SNDRV_PCM_STATE_SETUP); 957} 958 959/* 960 * pause callbacks 961 */ 962static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push) 963{ 964 struct snd_pcm_runtime *runtime = substream->runtime; 965 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE)) 966 return -ENOSYS; 967 if (push) { 968 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING) 969 return -EBADFD; 970 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED) 971 return -EBADFD; 972 runtime->trigger_master = substream; 973 return 0; 974} 975 976static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push) 977{ 978 if (substream->runtime->trigger_master != substream) 979 return 0; 980 /* some drivers might use hw_ptr to recover from the pause - 981 update the hw_ptr now */ 982 if (push) 983 snd_pcm_update_hw_ptr(substream); 984 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by 985 * a delta betwen the current jiffies, this gives a large enough 986 * delta, effectively to skip the check once. 987 */ 988 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000; 989 return substream->ops->trigger(substream, 990 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH : 991 SNDRV_PCM_TRIGGER_PAUSE_RELEASE); 992} 993 994static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push) 995{ 996 if (substream->runtime->trigger_master == substream) 997 substream->ops->trigger(substream, 998 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE : 999 SNDRV_PCM_TRIGGER_PAUSE_PUSH); 1000} 1001 1002static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push) 1003{ 1004 struct snd_pcm_runtime *runtime = substream->runtime; 1005 snd_pcm_trigger_tstamp(substream); 1006 if (push) { 1007 runtime->status->state = SNDRV_PCM_STATE_PAUSED; 1008 if (substream->timer) 1009 snd_timer_notify(substream->timer, 1010 SNDRV_TIMER_EVENT_MPAUSE, 1011 &runtime->trigger_tstamp); 1012 wake_up(&runtime->sleep); 1013 wake_up(&runtime->tsleep); 1014 } else { 1015 runtime->status->state = SNDRV_PCM_STATE_RUNNING; 1016 if (substream->timer) 1017 snd_timer_notify(substream->timer, 1018 SNDRV_TIMER_EVENT_MCONTINUE, 1019 &runtime->trigger_tstamp); 1020 } 1021} 1022 1023static struct action_ops snd_pcm_action_pause = { 1024 .pre_action = snd_pcm_pre_pause, 1025 .do_action = snd_pcm_do_pause, 1026 .undo_action = snd_pcm_undo_pause, 1027 .post_action = snd_pcm_post_pause 1028}; 1029 1030/* 1031 * Push/release the pause for all linked streams. 1032 */ 1033static int snd_pcm_pause(struct snd_pcm_substream *substream, int push) 1034{ 1035 return snd_pcm_action(&snd_pcm_action_pause, substream, push); 1036} 1037 1038#ifdef CONFIG_PM 1039/* suspend */ 1040 1041static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state) 1042{ 1043 struct snd_pcm_runtime *runtime = substream->runtime; 1044 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1045 return -EBUSY; 1046 runtime->trigger_master = substream; 1047 return 0; 1048} 1049 1050static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state) 1051{ 1052 struct snd_pcm_runtime *runtime = substream->runtime; 1053 if (runtime->trigger_master != substream) 1054 return 0; 1055 if (! snd_pcm_running(substream)) 1056 return 0; 1057 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); 1058 return 0; /* suspend unconditionally */ 1059} 1060 1061static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state) 1062{ 1063 struct snd_pcm_runtime *runtime = substream->runtime; 1064 snd_pcm_trigger_tstamp(substream); 1065 if (substream->timer) 1066 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND, 1067 &runtime->trigger_tstamp); 1068 runtime->status->suspended_state = runtime->status->state; 1069 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED; 1070 wake_up(&runtime->sleep); 1071 wake_up(&runtime->tsleep); 1072} 1073 1074static struct action_ops snd_pcm_action_suspend = { 1075 .pre_action = snd_pcm_pre_suspend, 1076 .do_action = snd_pcm_do_suspend, 1077 .post_action = snd_pcm_post_suspend 1078}; 1079 1080/** 1081 * snd_pcm_suspend - trigger SUSPEND to all linked streams 1082 * @substream: the PCM substream 1083 * 1084 * After this call, all streams are changed to SUSPENDED state. 1085 */ 1086int snd_pcm_suspend(struct snd_pcm_substream *substream) 1087{ 1088 int err; 1089 unsigned long flags; 1090 1091 if (! substream) 1092 return 0; 1093 1094 snd_pcm_stream_lock_irqsave(substream, flags); 1095 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0); 1096 snd_pcm_stream_unlock_irqrestore(substream, flags); 1097 return err; 1098} 1099 1100EXPORT_SYMBOL(snd_pcm_suspend); 1101 1102/** 1103 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm 1104 * @pcm: the PCM instance 1105 * 1106 * After this call, all streams are changed to SUSPENDED state. 1107 */ 1108int snd_pcm_suspend_all(struct snd_pcm *pcm) 1109{ 1110 struct snd_pcm_substream *substream; 1111 int stream, err = 0; 1112 1113 if (! pcm) 1114 return 0; 1115 1116 for (stream = 0; stream < 2; stream++) { 1117 for (substream = pcm->streams[stream].substream; 1118 substream; substream = substream->next) { 1119 if (substream->runtime == NULL) 1120 continue; 1121 err = snd_pcm_suspend(substream); 1122 if (err < 0 && err != -EBUSY) 1123 return err; 1124 } 1125 } 1126 return 0; 1127} 1128 1129EXPORT_SYMBOL(snd_pcm_suspend_all); 1130 1131/* resume */ 1132 1133static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state) 1134{ 1135 struct snd_pcm_runtime *runtime = substream->runtime; 1136 if (!(runtime->info & SNDRV_PCM_INFO_RESUME)) 1137 return -ENOSYS; 1138 runtime->trigger_master = substream; 1139 return 0; 1140} 1141 1142static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state) 1143{ 1144 struct snd_pcm_runtime *runtime = substream->runtime; 1145 if (runtime->trigger_master != substream) 1146 return 0; 1147 /* DMA not running previously? */ 1148 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING && 1149 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING || 1150 substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) 1151 return 0; 1152 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME); 1153} 1154 1155static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state) 1156{ 1157 if (substream->runtime->trigger_master == substream && 1158 snd_pcm_running(substream)) 1159 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); 1160} 1161 1162static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state) 1163{ 1164 struct snd_pcm_runtime *runtime = substream->runtime; 1165 snd_pcm_trigger_tstamp(substream); 1166 if (substream->timer) 1167 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME, 1168 &runtime->trigger_tstamp); 1169 runtime->status->state = runtime->status->suspended_state; 1170} 1171 1172static struct action_ops snd_pcm_action_resume = { 1173 .pre_action = snd_pcm_pre_resume, 1174 .do_action = snd_pcm_do_resume, 1175 .undo_action = snd_pcm_undo_resume, 1176 .post_action = snd_pcm_post_resume 1177}; 1178 1179static int snd_pcm_resume(struct snd_pcm_substream *substream) 1180{ 1181 struct snd_card *card = substream->pcm->card; 1182 int res; 1183 1184 snd_power_lock(card); 1185 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) 1186 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0); 1187 snd_power_unlock(card); 1188 return res; 1189} 1190 1191#else 1192 1193static int snd_pcm_resume(struct snd_pcm_substream *substream) 1194{ 1195 return -ENOSYS; 1196} 1197 1198#endif /* CONFIG_PM */ 1199 1200/* 1201 * xrun ioctl 1202 * 1203 * Change the RUNNING stream(s) to XRUN state. 1204 */ 1205static int snd_pcm_xrun(struct snd_pcm_substream *substream) 1206{ 1207 struct snd_card *card = substream->pcm->card; 1208 struct snd_pcm_runtime *runtime = substream->runtime; 1209 int result; 1210 1211 snd_power_lock(card); 1212 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1213 result = snd_power_wait(card, SNDRV_CTL_POWER_D0); 1214 if (result < 0) 1215 goto _unlock; 1216 } 1217 1218 snd_pcm_stream_lock_irq(substream); 1219 switch (runtime->status->state) { 1220 case SNDRV_PCM_STATE_XRUN: 1221 result = 0; /* already there */ 1222 break; 1223 case SNDRV_PCM_STATE_RUNNING: 1224 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); 1225 break; 1226 default: 1227 result = -EBADFD; 1228 } 1229 snd_pcm_stream_unlock_irq(substream); 1230 _unlock: 1231 snd_power_unlock(card); 1232 return result; 1233} 1234 1235/* 1236 * reset ioctl 1237 */ 1238static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state) 1239{ 1240 struct snd_pcm_runtime *runtime = substream->runtime; 1241 switch (runtime->status->state) { 1242 case SNDRV_PCM_STATE_RUNNING: 1243 case SNDRV_PCM_STATE_PREPARED: 1244 case SNDRV_PCM_STATE_PAUSED: 1245 case SNDRV_PCM_STATE_SUSPENDED: 1246 return 0; 1247 default: 1248 return -EBADFD; 1249 } 1250} 1251 1252static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state) 1253{ 1254 struct snd_pcm_runtime *runtime = substream->runtime; 1255 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL); 1256 if (err < 0) 1257 return err; 1258 runtime->hw_ptr_base = 0; 1259 runtime->hw_ptr_interrupt = runtime->status->hw_ptr - 1260 runtime->status->hw_ptr % runtime->period_size; 1261 runtime->silence_start = runtime->status->hw_ptr; 1262 runtime->silence_filled = 0; 1263 return 0; 1264} 1265 1266static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state) 1267{ 1268 struct snd_pcm_runtime *runtime = substream->runtime; 1269 runtime->control->appl_ptr = runtime->status->hw_ptr; 1270 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 1271 runtime->silence_size > 0) 1272 snd_pcm_playback_silence(substream, ULONG_MAX); 1273} 1274 1275static struct action_ops snd_pcm_action_reset = { 1276 .pre_action = snd_pcm_pre_reset, 1277 .do_action = snd_pcm_do_reset, 1278 .post_action = snd_pcm_post_reset 1279}; 1280 1281static int snd_pcm_reset(struct snd_pcm_substream *substream) 1282{ 1283 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0); 1284} 1285 1286/* 1287 * prepare ioctl 1288 */ 1289/* we use the second argument for updating f_flags */ 1290static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream, 1291 int f_flags) 1292{ 1293 struct snd_pcm_runtime *runtime = substream->runtime; 1294 if (runtime->status->state == SNDRV_PCM_STATE_OPEN || 1295 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED) 1296 return -EBADFD; 1297 if (snd_pcm_running(substream)) 1298 return -EBUSY; 1299 substream->f_flags = f_flags; 1300 return 0; 1301} 1302 1303static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state) 1304{ 1305 int err; 1306 err = substream->ops->prepare(substream); 1307 if (err < 0) 1308 return err; 1309 return snd_pcm_do_reset(substream, 0); 1310} 1311 1312static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state) 1313{ 1314 struct snd_pcm_runtime *runtime = substream->runtime; 1315 runtime->control->appl_ptr = runtime->status->hw_ptr; 1316 runtime->status->state = SNDRV_PCM_STATE_PREPARED; 1317} 1318 1319static struct action_ops snd_pcm_action_prepare = { 1320 .pre_action = snd_pcm_pre_prepare, 1321 .do_action = snd_pcm_do_prepare, 1322 .post_action = snd_pcm_post_prepare 1323}; 1324 1325/** 1326 * snd_pcm_prepare - prepare the PCM substream to be triggerable 1327 * @substream: the PCM substream instance 1328 * @file: file to refer f_flags 1329 */ 1330static int snd_pcm_prepare(struct snd_pcm_substream *substream, 1331 struct file *file) 1332{ 1333 int res; 1334 struct snd_card *card = substream->pcm->card; 1335 int f_flags; 1336 1337 if (file) 1338 f_flags = file->f_flags; 1339 else 1340 f_flags = substream->f_flags; 1341 1342 snd_power_lock(card); 1343 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) 1344 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare, 1345 substream, f_flags); 1346 snd_power_unlock(card); 1347 return res; 1348} 1349 1350/* 1351 * drain ioctl 1352 */ 1353 1354static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state) 1355{ 1356 substream->runtime->trigger_master = substream; 1357 return 0; 1358} 1359 1360static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state) 1361{ 1362 struct snd_pcm_runtime *runtime = substream->runtime; 1363 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 1364 switch (runtime->status->state) { 1365 case SNDRV_PCM_STATE_PREPARED: 1366 /* start playback stream if possible */ 1367 if (! snd_pcm_playback_empty(substream)) { 1368 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING); 1369 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING); 1370 } 1371 break; 1372 case SNDRV_PCM_STATE_RUNNING: 1373 runtime->status->state = SNDRV_PCM_STATE_DRAINING; 1374 break; 1375 default: 1376 break; 1377 } 1378 } else { 1379 /* stop running stream */ 1380 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) { 1381 int new_state = snd_pcm_capture_avail(runtime) > 0 ? 1382 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP; 1383 snd_pcm_do_stop(substream, new_state); 1384 snd_pcm_post_stop(substream, new_state); 1385 } 1386 } 1387 return 0; 1388} 1389 1390static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state) 1391{ 1392} 1393 1394static struct action_ops snd_pcm_action_drain_init = { 1395 .pre_action = snd_pcm_pre_drain_init, 1396 .do_action = snd_pcm_do_drain_init, 1397 .post_action = snd_pcm_post_drain_init 1398}; 1399 1400static int snd_pcm_drop(struct snd_pcm_substream *substream); 1401 1402/* 1403 * Drain the stream(s). 1404 * When the substream is linked, sync until the draining of all playback streams 1405 * is finished. 1406 * After this call, all streams are supposed to be either SETUP or DRAINING 1407 * (capture only) state. 1408 */ 1409static int snd_pcm_drain(struct snd_pcm_substream *substream, 1410 struct file *file) 1411{ 1412 struct snd_card *card; 1413 struct snd_pcm_runtime *runtime; 1414 struct snd_pcm_substream *s; 1415 wait_queue_t wait; 1416 int result = 0; 1417 int nonblock = 0; 1418 1419 card = substream->pcm->card; 1420 runtime = substream->runtime; 1421 1422 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 1423 return -EBADFD; 1424 1425 snd_power_lock(card); 1426 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1427 result = snd_power_wait(card, SNDRV_CTL_POWER_D0); 1428 if (result < 0) { 1429 snd_power_unlock(card); 1430 return result; 1431 } 1432 } 1433 1434 if (file) { 1435 if (file->f_flags & O_NONBLOCK) 1436 nonblock = 1; 1437 } else if (substream->f_flags & O_NONBLOCK) 1438 nonblock = 1; 1439 1440 down_read(&snd_pcm_link_rwsem); 1441 snd_pcm_stream_lock_irq(substream); 1442 /* resume pause */ 1443 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) 1444 snd_pcm_pause(substream, 0); 1445 1446 /* pre-start/stop - all running streams are changed to DRAINING state */ 1447 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0); 1448 if (result < 0) 1449 goto unlock; 1450 /* in non-blocking, we don't wait in ioctl but let caller poll */ 1451 if (nonblock) { 1452 result = -EAGAIN; 1453 goto unlock; 1454 } 1455 1456 for (;;) { 1457 long tout; 1458 struct snd_pcm_runtime *to_check; 1459 if (signal_pending(current)) { 1460 result = -ERESTARTSYS; 1461 break; 1462 } 1463 /* find a substream to drain */ 1464 to_check = NULL; 1465 snd_pcm_group_for_each_entry(s, substream) { 1466 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK) 1467 continue; 1468 runtime = s->runtime; 1469 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 1470 to_check = runtime; 1471 break; 1472 } 1473 } 1474 if (!to_check) 1475 break; /* all drained */ 1476 init_waitqueue_entry(&wait, current); 1477 add_wait_queue(&to_check->sleep, &wait); 1478 set_current_state(TASK_INTERRUPTIBLE); 1479 snd_pcm_stream_unlock_irq(substream); 1480 up_read(&snd_pcm_link_rwsem); 1481 snd_power_unlock(card); 1482 tout = schedule_timeout(10 * HZ); 1483 snd_power_lock(card); 1484 down_read(&snd_pcm_link_rwsem); 1485 snd_pcm_stream_lock_irq(substream); 1486 remove_wait_queue(&to_check->sleep, &wait); 1487 if (tout == 0) { 1488 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1489 result = -ESTRPIPE; 1490 else { 1491 snd_printd("playback drain error (DMA or IRQ trouble?)\n"); 1492 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1493 result = -EIO; 1494 } 1495 break; 1496 } 1497 } 1498 1499 unlock: 1500 snd_pcm_stream_unlock_irq(substream); 1501 up_read(&snd_pcm_link_rwsem); 1502 snd_power_unlock(card); 1503 1504 return result; 1505} 1506 1507/* 1508 * drop ioctl 1509 * 1510 * Immediately put all linked substreams into SETUP state. 1511 */ 1512static int snd_pcm_drop(struct snd_pcm_substream *substream) 1513{ 1514 struct snd_pcm_runtime *runtime; 1515 struct snd_card *card; 1516 int result = 0; 1517 1518 if (PCM_RUNTIME_CHECK(substream)) 1519 return -ENXIO; 1520 runtime = substream->runtime; 1521 card = substream->pcm->card; 1522 1523 if (runtime->status->state == SNDRV_PCM_STATE_OPEN || 1524 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED || 1525 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1526 return -EBADFD; 1527 1528 snd_pcm_stream_lock_irq(substream); 1529 /* resume pause */ 1530 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) 1531 snd_pcm_pause(substream, 0); 1532 1533 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1534 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */ 1535 snd_pcm_stream_unlock_irq(substream); 1536 1537 return result; 1538} 1539 1540 1541/* WARNING: Don't forget to fput back the file */ 1542static struct file *snd_pcm_file_fd(int fd) 1543{ 1544 struct file *file; 1545 struct inode *inode; 1546 unsigned int minor; 1547 1548 file = fget(fd); 1549 if (!file) 1550 return NULL; 1551 inode = file->f_path.dentry->d_inode; 1552 if (!S_ISCHR(inode->i_mode) || 1553 imajor(inode) != snd_major) { 1554 fput(file); 1555 return NULL; 1556 } 1557 minor = iminor(inode); 1558 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) && 1559 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) { 1560 fput(file); 1561 return NULL; 1562 } 1563 return file; 1564} 1565 1566/* 1567 * PCM link handling 1568 */ 1569static int snd_pcm_link(struct snd_pcm_substream *substream, int fd) 1570{ 1571 int res = 0; 1572 struct file *file; 1573 struct snd_pcm_file *pcm_file; 1574 struct snd_pcm_substream *substream1; 1575 1576 file = snd_pcm_file_fd(fd); 1577 if (!file) 1578 return -EBADFD; 1579 pcm_file = file->private_data; 1580 substream1 = pcm_file->substream; 1581 down_write(&snd_pcm_link_rwsem); 1582 write_lock_irq(&snd_pcm_link_rwlock); 1583 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN || 1584 substream->runtime->status->state != substream1->runtime->status->state) { 1585 res = -EBADFD; 1586 goto _end; 1587 } 1588 if (snd_pcm_stream_linked(substream1)) { 1589 res = -EALREADY; 1590 goto _end; 1591 } 1592 if (!snd_pcm_stream_linked(substream)) { 1593 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC); 1594 if (substream->group == NULL) { 1595 res = -ENOMEM; 1596 goto _end; 1597 } 1598 spin_lock_init(&substream->group->lock); 1599 INIT_LIST_HEAD(&substream->group->substreams); 1600 list_add_tail(&substream->link_list, &substream->group->substreams); 1601 substream->group->count = 1; 1602 } 1603 list_add_tail(&substream1->link_list, &substream->group->substreams); 1604 substream->group->count++; 1605 substream1->group = substream->group; 1606 _end: 1607 write_unlock_irq(&snd_pcm_link_rwlock); 1608 up_write(&snd_pcm_link_rwsem); 1609 fput(file); 1610 return res; 1611} 1612 1613static void relink_to_local(struct snd_pcm_substream *substream) 1614{ 1615 substream->group = &substream->self_group; 1616 INIT_LIST_HEAD(&substream->self_group.substreams); 1617 list_add_tail(&substream->link_list, &substream->self_group.substreams); 1618} 1619 1620static int snd_pcm_unlink(struct snd_pcm_substream *substream) 1621{ 1622 struct snd_pcm_substream *s; 1623 int res = 0; 1624 1625 down_write(&snd_pcm_link_rwsem); 1626 write_lock_irq(&snd_pcm_link_rwlock); 1627 if (!snd_pcm_stream_linked(substream)) { 1628 res = -EALREADY; 1629 goto _end; 1630 } 1631 list_del(&substream->link_list); 1632 substream->group->count--; 1633 if (substream->group->count == 1) { /* detach the last stream, too */ 1634 snd_pcm_group_for_each_entry(s, substream) { 1635 relink_to_local(s); 1636 break; 1637 } 1638 kfree(substream->group); 1639 } 1640 relink_to_local(substream); 1641 _end: 1642 write_unlock_irq(&snd_pcm_link_rwlock); 1643 up_write(&snd_pcm_link_rwsem); 1644 return res; 1645} 1646 1647/* 1648 * hw configurator 1649 */ 1650static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params, 1651 struct snd_pcm_hw_rule *rule) 1652{ 1653 struct snd_interval t; 1654 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]), 1655 hw_param_interval_c(params, rule->deps[1]), &t); 1656 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1657} 1658 1659static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params, 1660 struct snd_pcm_hw_rule *rule) 1661{ 1662 struct snd_interval t; 1663 snd_interval_div(hw_param_interval_c(params, rule->deps[0]), 1664 hw_param_interval_c(params, rule->deps[1]), &t); 1665 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1666} 1667 1668static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params, 1669 struct snd_pcm_hw_rule *rule) 1670{ 1671 struct snd_interval t; 1672 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]), 1673 hw_param_interval_c(params, rule->deps[1]), 1674 (unsigned long) rule->private, &t); 1675 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1676} 1677 1678static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params, 1679 struct snd_pcm_hw_rule *rule) 1680{ 1681 struct snd_interval t; 1682 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]), 1683 (unsigned long) rule->private, 1684 hw_param_interval_c(params, rule->deps[1]), &t); 1685 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1686} 1687 1688static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params, 1689 struct snd_pcm_hw_rule *rule) 1690{ 1691 unsigned int k; 1692 struct snd_interval *i = hw_param_interval(params, rule->deps[0]); 1693 struct snd_mask m; 1694 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 1695 snd_mask_any(&m); 1696 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { 1697 int bits; 1698 if (! snd_mask_test(mask, k)) 1699 continue; 1700 bits = snd_pcm_format_physical_width(k); 1701 if (bits <= 0) 1702 continue; /* ignore invalid formats */ 1703 if ((unsigned)bits < i->min || (unsigned)bits > i->max) 1704 snd_mask_reset(&m, k); 1705 } 1706 return snd_mask_refine(mask, &m); 1707} 1708 1709static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params, 1710 struct snd_pcm_hw_rule *rule) 1711{ 1712 struct snd_interval t; 1713 unsigned int k; 1714 t.min = UINT_MAX; 1715 t.max = 0; 1716 t.openmin = 0; 1717 t.openmax = 0; 1718 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { 1719 int bits; 1720 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k)) 1721 continue; 1722 bits = snd_pcm_format_physical_width(k); 1723 if (bits <= 0) 1724 continue; /* ignore invalid formats */ 1725 if (t.min > (unsigned)bits) 1726 t.min = bits; 1727 if (t.max < (unsigned)bits) 1728 t.max = bits; 1729 } 1730 t.integer = 1; 1731 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1732} 1733 1734#if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12 1735#error "Change this table" 1736#endif 1737 1738static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100, 1739 48000, 64000, 88200, 96000, 176400, 192000 }; 1740 1741const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = { 1742 .count = ARRAY_SIZE(rates), 1743 .list = rates, 1744}; 1745 1746static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params, 1747 struct snd_pcm_hw_rule *rule) 1748{ 1749 struct snd_pcm_hardware *hw = rule->private; 1750 return snd_interval_list(hw_param_interval(params, rule->var), 1751 snd_pcm_known_rates.count, 1752 snd_pcm_known_rates.list, hw->rates); 1753} 1754 1755static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params, 1756 struct snd_pcm_hw_rule *rule) 1757{ 1758 struct snd_interval t; 1759 struct snd_pcm_substream *substream = rule->private; 1760 t.min = 0; 1761 t.max = substream->buffer_bytes_max; 1762 t.openmin = 0; 1763 t.openmax = 0; 1764 t.integer = 1; 1765 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1766} 1767 1768int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream) 1769{ 1770 struct snd_pcm_runtime *runtime = substream->runtime; 1771 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; 1772 int k, err; 1773 1774 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { 1775 snd_mask_any(constrs_mask(constrs, k)); 1776 } 1777 1778 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { 1779 snd_interval_any(constrs_interval(constrs, k)); 1780 } 1781 1782 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS)); 1783 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)); 1784 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)); 1785 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)); 1786 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS)); 1787 1788 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, 1789 snd_pcm_hw_rule_format, NULL, 1790 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1791 if (err < 0) 1792 return err; 1793 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 1794 snd_pcm_hw_rule_sample_bits, NULL, 1795 SNDRV_PCM_HW_PARAM_FORMAT, 1796 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1797 if (err < 0) 1798 return err; 1799 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 1800 snd_pcm_hw_rule_div, NULL, 1801 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); 1802 if (err < 0) 1803 return err; 1804 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1805 snd_pcm_hw_rule_mul, NULL, 1806 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); 1807 if (err < 0) 1808 return err; 1809 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1810 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1811 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 1812 if (err < 0) 1813 return err; 1814 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1815 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1816 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1); 1817 if (err < 0) 1818 return err; 1819 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 1820 snd_pcm_hw_rule_div, NULL, 1821 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1822 if (err < 0) 1823 return err; 1824 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1825 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1826 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1); 1827 if (err < 0) 1828 return err; 1829 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1830 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1831 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1); 1832 if (err < 0) 1833 return err; 1834 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, 1835 snd_pcm_hw_rule_div, NULL, 1836 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 1837 if (err < 0) 1838 return err; 1839 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1840 snd_pcm_hw_rule_div, NULL, 1841 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); 1842 if (err < 0) 1843 return err; 1844 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1845 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1846 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1847 if (err < 0) 1848 return err; 1849 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1850 snd_pcm_hw_rule_muldivk, (void*) 1000000, 1851 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); 1852 if (err < 0) 1853 return err; 1854 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1855 snd_pcm_hw_rule_mul, NULL, 1856 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); 1857 if (err < 0) 1858 return err; 1859 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1860 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1861 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1862 if (err < 0) 1863 return err; 1864 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1865 snd_pcm_hw_rule_muldivk, (void*) 1000000, 1866 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); 1867 if (err < 0) 1868 return err; 1869 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 1870 snd_pcm_hw_rule_muldivk, (void*) 8, 1871 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1872 if (err < 0) 1873 return err; 1874 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1875 snd_pcm_hw_rule_muldivk, (void*) 8, 1876 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1877 if (err < 0) 1878 return err; 1879 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 1880 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1881 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); 1882 if (err < 0) 1883 return err; 1884 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME, 1885 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1886 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); 1887 if (err < 0) 1888 return err; 1889 return 0; 1890} 1891 1892int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream) 1893{ 1894 struct snd_pcm_runtime *runtime = substream->runtime; 1895 struct snd_pcm_hardware *hw = &runtime->hw; 1896 int err; 1897 unsigned int mask = 0; 1898 1899 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) 1900 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED; 1901 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) 1902 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED; 1903 if (hw->info & SNDRV_PCM_INFO_MMAP) { 1904 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) 1905 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; 1906 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) 1907 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED; 1908 if (hw->info & SNDRV_PCM_INFO_COMPLEX) 1909 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX; 1910 } 1911 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask); 1912 if (err < 0) 1913 return err; 1914 1915 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats); 1916 if (err < 0) 1917 return err; 1918 1919 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD); 1920 if (err < 0) 1921 return err; 1922 1923 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, 1924 hw->channels_min, hw->channels_max); 1925 if (err < 0) 1926 return err; 1927 1928 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE, 1929 hw->rate_min, hw->rate_max); 1930 if (err < 0) 1931 return err; 1932 1933 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 1934 hw->period_bytes_min, hw->period_bytes_max); 1935 if (err < 0) 1936 return err; 1937 1938 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS, 1939 hw->periods_min, hw->periods_max); 1940 if (err < 0) 1941 return err; 1942 1943 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1944 hw->period_bytes_min, hw->buffer_bytes_max); 1945 if (err < 0) 1946 return err; 1947 1948 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1949 snd_pcm_hw_rule_buffer_bytes_max, substream, 1950 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1); 1951 if (err < 0) 1952 return err; 1953 1954 if (runtime->dma_bytes) { 1955 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes); 1956 if (err < 0) 1957 return -EINVAL; 1958 } 1959 1960 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) { 1961 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1962 snd_pcm_hw_rule_rate, hw, 1963 SNDRV_PCM_HW_PARAM_RATE, -1); 1964 if (err < 0) 1965 return err; 1966 } 1967 1968 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE); 1969 1970 return 0; 1971} 1972 1973static void pcm_release_private(struct snd_pcm_substream *substream) 1974{ 1975 snd_pcm_unlink(substream); 1976} 1977 1978void snd_pcm_release_substream(struct snd_pcm_substream *substream) 1979{ 1980 substream->ref_count--; 1981 if (substream->ref_count > 0) 1982 return; 1983 1984 snd_pcm_drop(substream); 1985 if (substream->hw_opened) { 1986 if (substream->ops->hw_free != NULL) 1987 substream->ops->hw_free(substream); 1988 substream->ops->close(substream); 1989 substream->hw_opened = 0; 1990 } 1991 if (pm_qos_request_active(&substream->latency_pm_qos_req)) 1992 pm_qos_remove_request(&substream->latency_pm_qos_req); 1993 if (substream->pcm_release) { 1994 substream->pcm_release(substream); 1995 substream->pcm_release = NULL; 1996 } 1997 snd_pcm_detach_substream(substream); 1998} 1999 2000EXPORT_SYMBOL(snd_pcm_release_substream); 2001 2002int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, 2003 struct file *file, 2004 struct snd_pcm_substream **rsubstream) 2005{ 2006 struct snd_pcm_substream *substream; 2007 int err; 2008 2009 err = snd_pcm_attach_substream(pcm, stream, file, &substream); 2010 if (err < 0) 2011 return err; 2012 if (substream->ref_count > 1) { 2013 *rsubstream = substream; 2014 return 0; 2015 } 2016 2017 err = snd_pcm_hw_constraints_init(substream); 2018 if (err < 0) { 2019 snd_printd("snd_pcm_hw_constraints_init failed\n"); 2020 goto error; 2021 } 2022 2023 if ((err = substream->ops->open(substream)) < 0) 2024 goto error; 2025 2026 substream->hw_opened = 1; 2027 2028 err = snd_pcm_hw_constraints_complete(substream); 2029 if (err < 0) { 2030 snd_printd("snd_pcm_hw_constraints_complete failed\n"); 2031 goto error; 2032 } 2033 2034 *rsubstream = substream; 2035 return 0; 2036 2037 error: 2038 snd_pcm_release_substream(substream); 2039 return err; 2040} 2041 2042EXPORT_SYMBOL(snd_pcm_open_substream); 2043 2044static int snd_pcm_open_file(struct file *file, 2045 struct snd_pcm *pcm, 2046 int stream, 2047 struct snd_pcm_file **rpcm_file) 2048{ 2049 struct snd_pcm_file *pcm_file; 2050 struct snd_pcm_substream *substream; 2051 struct snd_pcm_str *str; 2052 int err; 2053 2054 if (rpcm_file) 2055 *rpcm_file = NULL; 2056 2057 err = snd_pcm_open_substream(pcm, stream, file, &substream); 2058 if (err < 0) 2059 return err; 2060 2061 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL); 2062 if (pcm_file == NULL) { 2063 snd_pcm_release_substream(substream); 2064 return -ENOMEM; 2065 } 2066 pcm_file->substream = substream; 2067 if (substream->ref_count == 1) { 2068 str = substream->pstr; 2069 substream->file = pcm_file; 2070 substream->pcm_release = pcm_release_private; 2071 } 2072 file->private_data = pcm_file; 2073 if (rpcm_file) 2074 *rpcm_file = pcm_file; 2075 return 0; 2076} 2077 2078static int snd_pcm_playback_open(struct inode *inode, struct file *file) 2079{ 2080 struct snd_pcm *pcm; 2081 int err = nonseekable_open(inode, file); 2082 if (err < 0) 2083 return err; 2084 pcm = snd_lookup_minor_data(iminor(inode), 2085 SNDRV_DEVICE_TYPE_PCM_PLAYBACK); 2086 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK); 2087} 2088 2089static int snd_pcm_capture_open(struct inode *inode, struct file *file) 2090{ 2091 struct snd_pcm *pcm; 2092 int err = nonseekable_open(inode, file); 2093 if (err < 0) 2094 return err; 2095 pcm = snd_lookup_minor_data(iminor(inode), 2096 SNDRV_DEVICE_TYPE_PCM_CAPTURE); 2097 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE); 2098} 2099 2100static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream) 2101{ 2102 int err; 2103 struct snd_pcm_file *pcm_file; 2104 wait_queue_t wait; 2105 2106 if (pcm == NULL) { 2107 err = -ENODEV; 2108 goto __error1; 2109 } 2110 err = snd_card_file_add(pcm->card, file); 2111 if (err < 0) 2112 goto __error1; 2113 if (!try_module_get(pcm->card->module)) { 2114 err = -EFAULT; 2115 goto __error2; 2116 } 2117 init_waitqueue_entry(&wait, current); 2118 add_wait_queue(&pcm->open_wait, &wait); 2119 mutex_lock(&pcm->open_mutex); 2120 while (1) { 2121 err = snd_pcm_open_file(file, pcm, stream, &pcm_file); 2122 if (err >= 0) 2123 break; 2124 if (err == -EAGAIN) { 2125 if (file->f_flags & O_NONBLOCK) { 2126 err = -EBUSY; 2127 break; 2128 } 2129 } else 2130 break; 2131 set_current_state(TASK_INTERRUPTIBLE); 2132 mutex_unlock(&pcm->open_mutex); 2133 schedule(); 2134 mutex_lock(&pcm->open_mutex); 2135 if (signal_pending(current)) { 2136 err = -ERESTARTSYS; 2137 break; 2138 } 2139 } 2140 remove_wait_queue(&pcm->open_wait, &wait); 2141 mutex_unlock(&pcm->open_mutex); 2142 if (err < 0) 2143 goto __error; 2144 return err; 2145 2146 __error: 2147 module_put(pcm->card->module); 2148 __error2: 2149 snd_card_file_remove(pcm->card, file); 2150 __error1: 2151 return err; 2152} 2153 2154static int snd_pcm_release(struct inode *inode, struct file *file) 2155{ 2156 struct snd_pcm *pcm; 2157 struct snd_pcm_substream *substream; 2158 struct snd_pcm_file *pcm_file; 2159 2160 pcm_file = file->private_data; 2161 substream = pcm_file->substream; 2162 if (snd_BUG_ON(!substream)) 2163 return -ENXIO; 2164 pcm = substream->pcm; 2165 mutex_lock(&pcm->open_mutex); 2166 snd_pcm_release_substream(substream); 2167 kfree(pcm_file); 2168 mutex_unlock(&pcm->open_mutex); 2169 wake_up(&pcm->open_wait); 2170 module_put(pcm->card->module); 2171 snd_card_file_remove(pcm->card, file); 2172 return 0; 2173} 2174 2175static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream, 2176 snd_pcm_uframes_t frames) 2177{ 2178 struct snd_pcm_runtime *runtime = substream->runtime; 2179 snd_pcm_sframes_t appl_ptr; 2180 snd_pcm_sframes_t ret; 2181 snd_pcm_sframes_t hw_avail; 2182 2183 if (frames == 0) 2184 return 0; 2185 2186 snd_pcm_stream_lock_irq(substream); 2187 switch (runtime->status->state) { 2188 case SNDRV_PCM_STATE_PREPARED: 2189 break; 2190 case SNDRV_PCM_STATE_DRAINING: 2191 case SNDRV_PCM_STATE_RUNNING: 2192 if (snd_pcm_update_hw_ptr(substream) >= 0) 2193 break; 2194 /* Fall through */ 2195 case SNDRV_PCM_STATE_XRUN: 2196 ret = -EPIPE; 2197 goto __end; 2198 case SNDRV_PCM_STATE_SUSPENDED: 2199 ret = -ESTRPIPE; 2200 goto __end; 2201 default: 2202 ret = -EBADFD; 2203 goto __end; 2204 } 2205 2206 hw_avail = snd_pcm_playback_hw_avail(runtime); 2207 if (hw_avail <= 0) { 2208 ret = 0; 2209 goto __end; 2210 } 2211 if (frames > (snd_pcm_uframes_t)hw_avail) 2212 frames = hw_avail; 2213 appl_ptr = runtime->control->appl_ptr - frames; 2214 if (appl_ptr < 0) 2215 appl_ptr += runtime->boundary; 2216 runtime->control->appl_ptr = appl_ptr; 2217 ret = frames; 2218 __end: 2219 snd_pcm_stream_unlock_irq(substream); 2220 return ret; 2221} 2222 2223static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream, 2224 snd_pcm_uframes_t frames) 2225{ 2226 struct snd_pcm_runtime *runtime = substream->runtime; 2227 snd_pcm_sframes_t appl_ptr; 2228 snd_pcm_sframes_t ret; 2229 snd_pcm_sframes_t hw_avail; 2230 2231 if (frames == 0) 2232 return 0; 2233 2234 snd_pcm_stream_lock_irq(substream); 2235 switch (runtime->status->state) { 2236 case SNDRV_PCM_STATE_PREPARED: 2237 case SNDRV_PCM_STATE_DRAINING: 2238 break; 2239 case SNDRV_PCM_STATE_RUNNING: 2240 if (snd_pcm_update_hw_ptr(substream) >= 0) 2241 break; 2242 /* Fall through */ 2243 case SNDRV_PCM_STATE_XRUN: 2244 ret = -EPIPE; 2245 goto __end; 2246 case SNDRV_PCM_STATE_SUSPENDED: 2247 ret = -ESTRPIPE; 2248 goto __end; 2249 default: 2250 ret = -EBADFD; 2251 goto __end; 2252 } 2253 2254 hw_avail = snd_pcm_capture_hw_avail(runtime); 2255 if (hw_avail <= 0) { 2256 ret = 0; 2257 goto __end; 2258 } 2259 if (frames > (snd_pcm_uframes_t)hw_avail) 2260 frames = hw_avail; 2261 appl_ptr = runtime->control->appl_ptr - frames; 2262 if (appl_ptr < 0) 2263 appl_ptr += runtime->boundary; 2264 runtime->control->appl_ptr = appl_ptr; 2265 ret = frames; 2266 __end: 2267 snd_pcm_stream_unlock_irq(substream); 2268 return ret; 2269} 2270 2271static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream, 2272 snd_pcm_uframes_t frames) 2273{ 2274 struct snd_pcm_runtime *runtime = substream->runtime; 2275 snd_pcm_sframes_t appl_ptr; 2276 snd_pcm_sframes_t ret; 2277 snd_pcm_sframes_t avail; 2278 2279 if (frames == 0) 2280 return 0; 2281 2282 snd_pcm_stream_lock_irq(substream); 2283 switch (runtime->status->state) { 2284 case SNDRV_PCM_STATE_PREPARED: 2285 case SNDRV_PCM_STATE_PAUSED: 2286 break; 2287 case SNDRV_PCM_STATE_DRAINING: 2288 case SNDRV_PCM_STATE_RUNNING: 2289 if (snd_pcm_update_hw_ptr(substream) >= 0) 2290 break; 2291 /* Fall through */ 2292 case SNDRV_PCM_STATE_XRUN: 2293 ret = -EPIPE; 2294 goto __end; 2295 case SNDRV_PCM_STATE_SUSPENDED: 2296 ret = -ESTRPIPE; 2297 goto __end; 2298 default: 2299 ret = -EBADFD; 2300 goto __end; 2301 } 2302 2303 avail = snd_pcm_playback_avail(runtime); 2304 if (avail <= 0) { 2305 ret = 0; 2306 goto __end; 2307 } 2308 if (frames > (snd_pcm_uframes_t)avail) 2309 frames = avail; 2310 appl_ptr = runtime->control->appl_ptr + frames; 2311 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) 2312 appl_ptr -= runtime->boundary; 2313 runtime->control->appl_ptr = appl_ptr; 2314 ret = frames; 2315 __end: 2316 snd_pcm_stream_unlock_irq(substream); 2317 return ret; 2318} 2319 2320static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream, 2321 snd_pcm_uframes_t frames) 2322{ 2323 struct snd_pcm_runtime *runtime = substream->runtime; 2324 snd_pcm_sframes_t appl_ptr; 2325 snd_pcm_sframes_t ret; 2326 snd_pcm_sframes_t avail; 2327 2328 if (frames == 0) 2329 return 0; 2330 2331 snd_pcm_stream_lock_irq(substream); 2332 switch (runtime->status->state) { 2333 case SNDRV_PCM_STATE_PREPARED: 2334 case SNDRV_PCM_STATE_DRAINING: 2335 case SNDRV_PCM_STATE_PAUSED: 2336 break; 2337 case SNDRV_PCM_STATE_RUNNING: 2338 if (snd_pcm_update_hw_ptr(substream) >= 0) 2339 break; 2340 /* Fall through */ 2341 case SNDRV_PCM_STATE_XRUN: 2342 ret = -EPIPE; 2343 goto __end; 2344 case SNDRV_PCM_STATE_SUSPENDED: 2345 ret = -ESTRPIPE; 2346 goto __end; 2347 default: 2348 ret = -EBADFD; 2349 goto __end; 2350 } 2351 2352 avail = snd_pcm_capture_avail(runtime); 2353 if (avail <= 0) { 2354 ret = 0; 2355 goto __end; 2356 } 2357 if (frames > (snd_pcm_uframes_t)avail) 2358 frames = avail; 2359 appl_ptr = runtime->control->appl_ptr + frames; 2360 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) 2361 appl_ptr -= runtime->boundary; 2362 runtime->control->appl_ptr = appl_ptr; 2363 ret = frames; 2364 __end: 2365 snd_pcm_stream_unlock_irq(substream); 2366 return ret; 2367} 2368 2369static int snd_pcm_hwsync(struct snd_pcm_substream *substream) 2370{ 2371 struct snd_pcm_runtime *runtime = substream->runtime; 2372 int err; 2373 2374 snd_pcm_stream_lock_irq(substream); 2375 switch (runtime->status->state) { 2376 case SNDRV_PCM_STATE_DRAINING: 2377 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 2378 goto __badfd; 2379 case SNDRV_PCM_STATE_RUNNING: 2380 if ((err = snd_pcm_update_hw_ptr(substream)) < 0) 2381 break; 2382 /* Fall through */ 2383 case SNDRV_PCM_STATE_PREPARED: 2384 case SNDRV_PCM_STATE_SUSPENDED: 2385 err = 0; 2386 break; 2387 case SNDRV_PCM_STATE_XRUN: 2388 err = -EPIPE; 2389 break; 2390 default: 2391 __badfd: 2392 err = -EBADFD; 2393 break; 2394 } 2395 snd_pcm_stream_unlock_irq(substream); 2396 return err; 2397} 2398 2399static int snd_pcm_delay(struct snd_pcm_substream *substream, 2400 snd_pcm_sframes_t __user *res) 2401{ 2402 struct snd_pcm_runtime *runtime = substream->runtime; 2403 int err; 2404 snd_pcm_sframes_t n = 0; 2405 2406 snd_pcm_stream_lock_irq(substream); 2407 switch (runtime->status->state) { 2408 case SNDRV_PCM_STATE_DRAINING: 2409 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 2410 goto __badfd; 2411 case SNDRV_PCM_STATE_RUNNING: 2412 if ((err = snd_pcm_update_hw_ptr(substream)) < 0) 2413 break; 2414 /* Fall through */ 2415 case SNDRV_PCM_STATE_PREPARED: 2416 case SNDRV_PCM_STATE_SUSPENDED: 2417 err = 0; 2418 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2419 n = snd_pcm_playback_hw_avail(runtime); 2420 else 2421 n = snd_pcm_capture_avail(runtime); 2422 n += runtime->delay; 2423 break; 2424 case SNDRV_PCM_STATE_XRUN: 2425 err = -EPIPE; 2426 break; 2427 default: 2428 __badfd: 2429 err = -EBADFD; 2430 break; 2431 } 2432 snd_pcm_stream_unlock_irq(substream); 2433 if (!err) 2434 if (put_user(n, res)) 2435 err = -EFAULT; 2436 return err; 2437} 2438 2439static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream, 2440 struct snd_pcm_sync_ptr __user *_sync_ptr) 2441{ 2442 struct snd_pcm_runtime *runtime = substream->runtime; 2443 struct snd_pcm_sync_ptr sync_ptr; 2444 volatile struct snd_pcm_mmap_status *status; 2445 volatile struct snd_pcm_mmap_control *control; 2446 int err; 2447 2448 memset(&sync_ptr, 0, sizeof(sync_ptr)); 2449 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags))) 2450 return -EFAULT; 2451 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control))) 2452 return -EFAULT; 2453 status = runtime->status; 2454 control = runtime->control; 2455 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) { 2456 err = snd_pcm_hwsync(substream); 2457 if (err < 0) 2458 return err; 2459 } 2460 snd_pcm_stream_lock_irq(substream); 2461 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) 2462 control->appl_ptr = sync_ptr.c.control.appl_ptr; 2463 else 2464 sync_ptr.c.control.appl_ptr = control->appl_ptr; 2465 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) 2466 control->avail_min = sync_ptr.c.control.avail_min; 2467 else 2468 sync_ptr.c.control.avail_min = control->avail_min; 2469 sync_ptr.s.status.state = status->state; 2470 sync_ptr.s.status.hw_ptr = status->hw_ptr; 2471 sync_ptr.s.status.tstamp = status->tstamp; 2472 sync_ptr.s.status.suspended_state = status->suspended_state; 2473 snd_pcm_stream_unlock_irq(substream); 2474 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr))) 2475 return -EFAULT; 2476 return 0; 2477} 2478 2479static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg) 2480{ 2481 struct snd_pcm_runtime *runtime = substream->runtime; 2482 int arg; 2483 2484 if (get_user(arg, _arg)) 2485 return -EFAULT; 2486 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST) 2487 return -EINVAL; 2488 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY; 2489 if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC) 2490 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC; 2491 return 0; 2492} 2493 2494static int snd_pcm_common_ioctl1(struct file *file, 2495 struct snd_pcm_substream *substream, 2496 unsigned int cmd, void __user *arg) 2497{ 2498 switch (cmd) { 2499 case SNDRV_PCM_IOCTL_PVERSION: 2500 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0; 2501 case SNDRV_PCM_IOCTL_INFO: 2502 return snd_pcm_info_user(substream, arg); 2503 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */ 2504 return 0; 2505 case SNDRV_PCM_IOCTL_TTSTAMP: 2506 return snd_pcm_tstamp(substream, arg); 2507 case SNDRV_PCM_IOCTL_HW_REFINE: 2508 return snd_pcm_hw_refine_user(substream, arg); 2509 case SNDRV_PCM_IOCTL_HW_PARAMS: 2510 return snd_pcm_hw_params_user(substream, arg); 2511 case SNDRV_PCM_IOCTL_HW_FREE: 2512 return snd_pcm_hw_free(substream); 2513 case SNDRV_PCM_IOCTL_SW_PARAMS: 2514 return snd_pcm_sw_params_user(substream, arg); 2515 case SNDRV_PCM_IOCTL_STATUS: 2516 return snd_pcm_status_user(substream, arg); 2517 case SNDRV_PCM_IOCTL_CHANNEL_INFO: 2518 return snd_pcm_channel_info_user(substream, arg); 2519 case SNDRV_PCM_IOCTL_PREPARE: 2520 return snd_pcm_prepare(substream, file); 2521 case SNDRV_PCM_IOCTL_RESET: 2522 return snd_pcm_reset(substream); 2523 case SNDRV_PCM_IOCTL_START: 2524 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING); 2525 case SNDRV_PCM_IOCTL_LINK: 2526 return snd_pcm_link(substream, (int)(unsigned long) arg); 2527 case SNDRV_PCM_IOCTL_UNLINK: 2528 return snd_pcm_unlink(substream); 2529 case SNDRV_PCM_IOCTL_RESUME: 2530 return snd_pcm_resume(substream); 2531 case SNDRV_PCM_IOCTL_XRUN: 2532 return snd_pcm_xrun(substream); 2533 case SNDRV_PCM_IOCTL_HWSYNC: 2534 return snd_pcm_hwsync(substream); 2535 case SNDRV_PCM_IOCTL_DELAY: 2536 return snd_pcm_delay(substream, arg); 2537 case SNDRV_PCM_IOCTL_SYNC_PTR: 2538 return snd_pcm_sync_ptr(substream, arg); 2539#ifdef CONFIG_SND_SUPPORT_OLD_API 2540 case SNDRV_PCM_IOCTL_HW_REFINE_OLD: 2541 return snd_pcm_hw_refine_old_user(substream, arg); 2542 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD: 2543 return snd_pcm_hw_params_old_user(substream, arg); 2544#endif 2545 case SNDRV_PCM_IOCTL_DRAIN: 2546 return snd_pcm_drain(substream, file); 2547 case SNDRV_PCM_IOCTL_DROP: 2548 return snd_pcm_drop(substream); 2549 case SNDRV_PCM_IOCTL_PAUSE: 2550 { 2551 int res; 2552 snd_pcm_stream_lock_irq(substream); 2553 res = snd_pcm_pause(substream, (int)(unsigned long)arg); 2554 snd_pcm_stream_unlock_irq(substream); 2555 return res; 2556 } 2557 } 2558 snd_printd("unknown ioctl = 0x%x\n", cmd); 2559 return -ENOTTY; 2560} 2561 2562static int snd_pcm_playback_ioctl1(struct file *file, 2563 struct snd_pcm_substream *substream, 2564 unsigned int cmd, void __user *arg) 2565{ 2566 if (snd_BUG_ON(!substream)) 2567 return -ENXIO; 2568 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) 2569 return -EINVAL; 2570 switch (cmd) { 2571 case SNDRV_PCM_IOCTL_WRITEI_FRAMES: 2572 { 2573 struct snd_xferi xferi; 2574 struct snd_xferi __user *_xferi = arg; 2575 struct snd_pcm_runtime *runtime = substream->runtime; 2576 snd_pcm_sframes_t result; 2577 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2578 return -EBADFD; 2579 if (put_user(0, &_xferi->result)) 2580 return -EFAULT; 2581 if (copy_from_user(&xferi, _xferi, sizeof(xferi))) 2582 return -EFAULT; 2583 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames); 2584 __put_user(result, &_xferi->result); 2585 return result < 0 ? result : 0; 2586 } 2587 case SNDRV_PCM_IOCTL_WRITEN_FRAMES: 2588 { 2589 struct snd_xfern xfern; 2590 struct snd_xfern __user *_xfern = arg; 2591 struct snd_pcm_runtime *runtime = substream->runtime; 2592 void __user **bufs; 2593 snd_pcm_sframes_t result; 2594 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2595 return -EBADFD; 2596 if (runtime->channels > 128) 2597 return -EINVAL; 2598 if (put_user(0, &_xfern->result)) 2599 return -EFAULT; 2600 if (copy_from_user(&xfern, _xfern, sizeof(xfern))) 2601 return -EFAULT; 2602 2603 bufs = memdup_user(xfern.bufs, 2604 sizeof(void *) * runtime->channels); 2605 if (IS_ERR(bufs)) 2606 return PTR_ERR(bufs); 2607 result = snd_pcm_lib_writev(substream, bufs, xfern.frames); 2608 kfree(bufs); 2609 __put_user(result, &_xfern->result); 2610 return result < 0 ? result : 0; 2611 } 2612 case SNDRV_PCM_IOCTL_REWIND: 2613 { 2614 snd_pcm_uframes_t frames; 2615 snd_pcm_uframes_t __user *_frames = arg; 2616 snd_pcm_sframes_t result; 2617 if (get_user(frames, _frames)) 2618 return -EFAULT; 2619 if (put_user(0, _frames)) 2620 return -EFAULT; 2621 result = snd_pcm_playback_rewind(substream, frames); 2622 __put_user(result, _frames); 2623 return result < 0 ? result : 0; 2624 } 2625 case SNDRV_PCM_IOCTL_FORWARD: 2626 { 2627 snd_pcm_uframes_t frames; 2628 snd_pcm_uframes_t __user *_frames = arg; 2629 snd_pcm_sframes_t result; 2630 if (get_user(frames, _frames)) 2631 return -EFAULT; 2632 if (put_user(0, _frames)) 2633 return -EFAULT; 2634 result = snd_pcm_playback_forward(substream, frames); 2635 __put_user(result, _frames); 2636 return result < 0 ? result : 0; 2637 } 2638 } 2639 return snd_pcm_common_ioctl1(file, substream, cmd, arg); 2640} 2641 2642static int snd_pcm_capture_ioctl1(struct file *file, 2643 struct snd_pcm_substream *substream, 2644 unsigned int cmd, void __user *arg) 2645{ 2646 if (snd_BUG_ON(!substream)) 2647 return -ENXIO; 2648 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE)) 2649 return -EINVAL; 2650 switch (cmd) { 2651 case SNDRV_PCM_IOCTL_READI_FRAMES: 2652 { 2653 struct snd_xferi xferi; 2654 struct snd_xferi __user *_xferi = arg; 2655 struct snd_pcm_runtime *runtime = substream->runtime; 2656 snd_pcm_sframes_t result; 2657 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2658 return -EBADFD; 2659 if (put_user(0, &_xferi->result)) 2660 return -EFAULT; 2661 if (copy_from_user(&xferi, _xferi, sizeof(xferi))) 2662 return -EFAULT; 2663 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames); 2664 __put_user(result, &_xferi->result); 2665 return result < 0 ? result : 0; 2666 } 2667 case SNDRV_PCM_IOCTL_READN_FRAMES: 2668 { 2669 struct snd_xfern xfern; 2670 struct snd_xfern __user *_xfern = arg; 2671 struct snd_pcm_runtime *runtime = substream->runtime; 2672 void *bufs; 2673 snd_pcm_sframes_t result; 2674 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2675 return -EBADFD; 2676 if (runtime->channels > 128) 2677 return -EINVAL; 2678 if (put_user(0, &_xfern->result)) 2679 return -EFAULT; 2680 if (copy_from_user(&xfern, _xfern, sizeof(xfern))) 2681 return -EFAULT; 2682 2683 bufs = memdup_user(xfern.bufs, 2684 sizeof(void *) * runtime->channels); 2685 if (IS_ERR(bufs)) 2686 return PTR_ERR(bufs); 2687 result = snd_pcm_lib_readv(substream, bufs, xfern.frames); 2688 kfree(bufs); 2689 __put_user(result, &_xfern->result); 2690 return result < 0 ? result : 0; 2691 } 2692 case SNDRV_PCM_IOCTL_REWIND: 2693 { 2694 snd_pcm_uframes_t frames; 2695 snd_pcm_uframes_t __user *_frames = arg; 2696 snd_pcm_sframes_t result; 2697 if (get_user(frames, _frames)) 2698 return -EFAULT; 2699 if (put_user(0, _frames)) 2700 return -EFAULT; 2701 result = snd_pcm_capture_rewind(substream, frames); 2702 __put_user(result, _frames); 2703 return result < 0 ? result : 0; 2704 } 2705 case SNDRV_PCM_IOCTL_FORWARD: 2706 { 2707 snd_pcm_uframes_t frames; 2708 snd_pcm_uframes_t __user *_frames = arg; 2709 snd_pcm_sframes_t result; 2710 if (get_user(frames, _frames)) 2711 return -EFAULT; 2712 if (put_user(0, _frames)) 2713 return -EFAULT; 2714 result = snd_pcm_capture_forward(substream, frames); 2715 __put_user(result, _frames); 2716 return result < 0 ? result : 0; 2717 } 2718 } 2719 return snd_pcm_common_ioctl1(file, substream, cmd, arg); 2720} 2721 2722static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd, 2723 unsigned long arg) 2724{ 2725 struct snd_pcm_file *pcm_file; 2726 2727 pcm_file = file->private_data; 2728 2729 if (((cmd >> 8) & 0xff) != 'A') 2730 return -ENOTTY; 2731 2732 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd, 2733 (void __user *)arg); 2734} 2735 2736static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd, 2737 unsigned long arg) 2738{ 2739 struct snd_pcm_file *pcm_file; 2740 2741 pcm_file = file->private_data; 2742 2743 if (((cmd >> 8) & 0xff) != 'A') 2744 return -ENOTTY; 2745 2746 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd, 2747 (void __user *)arg); 2748} 2749 2750int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, 2751 unsigned int cmd, void *arg) 2752{ 2753 mm_segment_t fs; 2754 int result; 2755 2756 fs = snd_enter_user(); 2757 switch (substream->stream) { 2758 case SNDRV_PCM_STREAM_PLAYBACK: 2759 result = snd_pcm_playback_ioctl1(NULL, substream, cmd, 2760 (void __user *)arg); 2761 break; 2762 case SNDRV_PCM_STREAM_CAPTURE: 2763 result = snd_pcm_capture_ioctl1(NULL, substream, cmd, 2764 (void __user *)arg); 2765 break; 2766 default: 2767 result = -EINVAL; 2768 break; 2769 } 2770 snd_leave_user(fs); 2771 return result; 2772} 2773 2774EXPORT_SYMBOL(snd_pcm_kernel_ioctl); 2775 2776static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count, 2777 loff_t * offset) 2778{ 2779 struct snd_pcm_file *pcm_file; 2780 struct snd_pcm_substream *substream; 2781 struct snd_pcm_runtime *runtime; 2782 snd_pcm_sframes_t result; 2783 2784 pcm_file = file->private_data; 2785 substream = pcm_file->substream; 2786 if (PCM_RUNTIME_CHECK(substream)) 2787 return -ENXIO; 2788 runtime = substream->runtime; 2789 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2790 return -EBADFD; 2791 if (!frame_aligned(runtime, count)) 2792 return -EINVAL; 2793 count = bytes_to_frames(runtime, count); 2794 result = snd_pcm_lib_read(substream, buf, count); 2795 if (result > 0) 2796 result = frames_to_bytes(runtime, result); 2797 return result; 2798} 2799 2800static ssize_t snd_pcm_write(struct file *file, const char __user *buf, 2801 size_t count, loff_t * offset) 2802{ 2803 struct snd_pcm_file *pcm_file; 2804 struct snd_pcm_substream *substream; 2805 struct snd_pcm_runtime *runtime; 2806 snd_pcm_sframes_t result; 2807 2808 pcm_file = file->private_data; 2809 substream = pcm_file->substream; 2810 if (PCM_RUNTIME_CHECK(substream)) 2811 return -ENXIO; 2812 runtime = substream->runtime; 2813 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2814 return -EBADFD; 2815 if (!frame_aligned(runtime, count)) 2816 return -EINVAL; 2817 count = bytes_to_frames(runtime, count); 2818 result = snd_pcm_lib_write(substream, buf, count); 2819 if (result > 0) 2820 result = frames_to_bytes(runtime, result); 2821 return result; 2822} 2823 2824static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov, 2825 unsigned long nr_segs, loff_t pos) 2826 2827{ 2828 struct snd_pcm_file *pcm_file; 2829 struct snd_pcm_substream *substream; 2830 struct snd_pcm_runtime *runtime; 2831 snd_pcm_sframes_t result; 2832 unsigned long i; 2833 void __user **bufs; 2834 snd_pcm_uframes_t frames; 2835 2836 pcm_file = iocb->ki_filp->private_data; 2837 substream = pcm_file->substream; 2838 if (PCM_RUNTIME_CHECK(substream)) 2839 return -ENXIO; 2840 runtime = substream->runtime; 2841 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2842 return -EBADFD; 2843 if (nr_segs > 1024 || nr_segs != runtime->channels) 2844 return -EINVAL; 2845 if (!frame_aligned(runtime, iov->iov_len)) 2846 return -EINVAL; 2847 frames = bytes_to_samples(runtime, iov->iov_len); 2848 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL); 2849 if (bufs == NULL) 2850 return -ENOMEM; 2851 for (i = 0; i < nr_segs; ++i) 2852 bufs[i] = iov[i].iov_base; 2853 result = snd_pcm_lib_readv(substream, bufs, frames); 2854 if (result > 0) 2855 result = frames_to_bytes(runtime, result); 2856 kfree(bufs); 2857 return result; 2858} 2859 2860static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov, 2861 unsigned long nr_segs, loff_t pos) 2862{ 2863 struct snd_pcm_file *pcm_file; 2864 struct snd_pcm_substream *substream; 2865 struct snd_pcm_runtime *runtime; 2866 snd_pcm_sframes_t result; 2867 unsigned long i; 2868 void __user **bufs; 2869 snd_pcm_uframes_t frames; 2870 2871 pcm_file = iocb->ki_filp->private_data; 2872 substream = pcm_file->substream; 2873 if (PCM_RUNTIME_CHECK(substream)) 2874 return -ENXIO; 2875 runtime = substream->runtime; 2876 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2877 return -EBADFD; 2878 if (nr_segs > 128 || nr_segs != runtime->channels || 2879 !frame_aligned(runtime, iov->iov_len)) 2880 return -EINVAL; 2881 frames = bytes_to_samples(runtime, iov->iov_len); 2882 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL); 2883 if (bufs == NULL) 2884 return -ENOMEM; 2885 for (i = 0; i < nr_segs; ++i) 2886 bufs[i] = iov[i].iov_base; 2887 result = snd_pcm_lib_writev(substream, bufs, frames); 2888 if (result > 0) 2889 result = frames_to_bytes(runtime, result); 2890 kfree(bufs); 2891 return result; 2892} 2893 2894static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait) 2895{ 2896 struct snd_pcm_file *pcm_file; 2897 struct snd_pcm_substream *substream; 2898 struct snd_pcm_runtime *runtime; 2899 unsigned int mask; 2900 snd_pcm_uframes_t avail; 2901 2902 pcm_file = file->private_data; 2903 2904 substream = pcm_file->substream; 2905 if (PCM_RUNTIME_CHECK(substream)) 2906 return -ENXIO; 2907 runtime = substream->runtime; 2908 2909 poll_wait(file, &runtime->sleep, wait); 2910 2911 snd_pcm_stream_lock_irq(substream); 2912 avail = snd_pcm_playback_avail(runtime); 2913 switch (runtime->status->state) { 2914 case SNDRV_PCM_STATE_RUNNING: 2915 case SNDRV_PCM_STATE_PREPARED: 2916 case SNDRV_PCM_STATE_PAUSED: 2917 if (avail >= runtime->control->avail_min) { 2918 mask = POLLOUT | POLLWRNORM; 2919 break; 2920 } 2921 /* Fall through */ 2922 case SNDRV_PCM_STATE_DRAINING: 2923 mask = 0; 2924 break; 2925 default: 2926 mask = POLLOUT | POLLWRNORM | POLLERR; 2927 break; 2928 } 2929 snd_pcm_stream_unlock_irq(substream); 2930 return mask; 2931} 2932 2933static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait) 2934{ 2935 struct snd_pcm_file *pcm_file; 2936 struct snd_pcm_substream *substream; 2937 struct snd_pcm_runtime *runtime; 2938 unsigned int mask; 2939 snd_pcm_uframes_t avail; 2940 2941 pcm_file = file->private_data; 2942 2943 substream = pcm_file->substream; 2944 if (PCM_RUNTIME_CHECK(substream)) 2945 return -ENXIO; 2946 runtime = substream->runtime; 2947 2948 poll_wait(file, &runtime->sleep, wait); 2949 2950 snd_pcm_stream_lock_irq(substream); 2951 avail = snd_pcm_capture_avail(runtime); 2952 switch (runtime->status->state) { 2953 case SNDRV_PCM_STATE_RUNNING: 2954 case SNDRV_PCM_STATE_PREPARED: 2955 case SNDRV_PCM_STATE_PAUSED: 2956 if (avail >= runtime->control->avail_min) { 2957 mask = POLLIN | POLLRDNORM; 2958 break; 2959 } 2960 mask = 0; 2961 break; 2962 case SNDRV_PCM_STATE_DRAINING: 2963 if (avail > 0) { 2964 mask = POLLIN | POLLRDNORM; 2965 break; 2966 } 2967 /* Fall through */ 2968 default: 2969 mask = POLLIN | POLLRDNORM | POLLERR; 2970 break; 2971 } 2972 snd_pcm_stream_unlock_irq(substream); 2973 return mask; 2974} 2975 2976/* 2977 * mmap support 2978 */ 2979 2980/* 2981 * Only on coherent architectures, we can mmap the status and the control records 2982 * for effcient data transfer. On others, we have to use HWSYNC ioctl... 2983 */ 2984#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) 2985/* 2986 * mmap status record 2987 */ 2988static int snd_pcm_mmap_status_fault(struct vm_area_struct *area, 2989 struct vm_fault *vmf) 2990{ 2991 struct snd_pcm_substream *substream = area->vm_private_data; 2992 struct snd_pcm_runtime *runtime; 2993 2994 if (substream == NULL) 2995 return VM_FAULT_SIGBUS; 2996 runtime = substream->runtime; 2997 vmf->page = virt_to_page(runtime->status); 2998 get_page(vmf->page); 2999 return 0; 3000} 3001 3002static const struct vm_operations_struct snd_pcm_vm_ops_status = 3003{ 3004 .fault = snd_pcm_mmap_status_fault, 3005}; 3006 3007static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, 3008 struct vm_area_struct *area) 3009{ 3010 struct snd_pcm_runtime *runtime; 3011 long size; 3012 if (!(area->vm_flags & VM_READ)) 3013 return -EINVAL; 3014 runtime = substream->runtime; 3015 size = area->vm_end - area->vm_start; 3016 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))) 3017 return -EINVAL; 3018 area->vm_ops = &snd_pcm_vm_ops_status; 3019 area->vm_private_data = substream; 3020 area->vm_flags |= VM_RESERVED; 3021 return 0; 3022} 3023 3024/* 3025 * mmap control record 3026 */ 3027static int snd_pcm_mmap_control_fault(struct vm_area_struct *area, 3028 struct vm_fault *vmf) 3029{ 3030 struct snd_pcm_substream *substream = area->vm_private_data; 3031 struct snd_pcm_runtime *runtime; 3032 3033 if (substream == NULL) 3034 return VM_FAULT_SIGBUS; 3035 runtime = substream->runtime; 3036 vmf->page = virt_to_page(runtime->control); 3037 get_page(vmf->page); 3038 return 0; 3039} 3040 3041static const struct vm_operations_struct snd_pcm_vm_ops_control = 3042{ 3043 .fault = snd_pcm_mmap_control_fault, 3044}; 3045 3046static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, 3047 struct vm_area_struct *area) 3048{ 3049 struct snd_pcm_runtime *runtime; 3050 long size; 3051 if (!(area->vm_flags & VM_READ)) 3052 return -EINVAL; 3053 runtime = substream->runtime; 3054 size = area->vm_end - area->vm_start; 3055 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))) 3056 return -EINVAL; 3057 area->vm_ops = &snd_pcm_vm_ops_control; 3058 area->vm_private_data = substream; 3059 area->vm_flags |= VM_RESERVED; 3060 return 0; 3061} 3062#else /* ! coherent mmap */ 3063/* 3064 * don't support mmap for status and control records. 3065 */ 3066static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, 3067 struct vm_area_struct *area) 3068{ 3069 return -ENXIO; 3070} 3071static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, 3072 struct vm_area_struct *area) 3073{ 3074 return -ENXIO; 3075} 3076#endif /* coherent mmap */ 3077 3078static inline struct page * 3079snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs) 3080{ 3081 void *vaddr = substream->runtime->dma_area + ofs; 3082#if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT) 3083 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) 3084 return virt_to_page(CAC_ADDR(vaddr)); 3085#endif 3086#if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE) 3087 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) { 3088 dma_addr_t addr = substream->runtime->dma_addr + ofs; 3089 addr -= get_dma_offset(substream->dma_buffer.dev.dev); 3090 /* assume dma_handle set via pfn_to_phys() in 3091 * mm/dma-noncoherent.c 3092 */ 3093 return pfn_to_page(addr >> PAGE_SHIFT); 3094 } 3095#endif 3096 return virt_to_page(vaddr); 3097} 3098 3099/* 3100 * fault callback for mmapping a RAM page 3101 */ 3102static int snd_pcm_mmap_data_fault(struct vm_area_struct *area, 3103 struct vm_fault *vmf) 3104{ 3105 struct snd_pcm_substream *substream = area->vm_private_data; 3106 struct snd_pcm_runtime *runtime; 3107 unsigned long offset; 3108 struct page * page; 3109 size_t dma_bytes; 3110 3111 if (substream == NULL) 3112 return VM_FAULT_SIGBUS; 3113 runtime = substream->runtime; 3114 offset = vmf->pgoff << PAGE_SHIFT; 3115 dma_bytes = PAGE_ALIGN(runtime->dma_bytes); 3116 if (offset > dma_bytes - PAGE_SIZE) 3117 return VM_FAULT_SIGBUS; 3118 if (substream->ops->page) 3119 page = substream->ops->page(substream, offset); 3120 else 3121 page = snd_pcm_default_page_ops(substream, offset); 3122 if (!page) 3123 return VM_FAULT_SIGBUS; 3124 get_page(page); 3125 vmf->page = page; 3126 return 0; 3127} 3128 3129static const struct vm_operations_struct snd_pcm_vm_ops_data = { 3130 .open = snd_pcm_mmap_data_open, 3131 .close = snd_pcm_mmap_data_close, 3132}; 3133 3134static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = { 3135 .open = snd_pcm_mmap_data_open, 3136 .close = snd_pcm_mmap_data_close, 3137 .fault = snd_pcm_mmap_data_fault, 3138}; 3139 3140#ifndef ARCH_HAS_DMA_MMAP_COHERENT 3141/* This should be defined / handled globally! */ 3142#ifdef CONFIG_ARM 3143#define ARCH_HAS_DMA_MMAP_COHERENT 3144#endif 3145#endif 3146 3147/* 3148 * mmap the DMA buffer on RAM 3149 */ 3150static int snd_pcm_default_mmap(struct snd_pcm_substream *substream, 3151 struct vm_area_struct *area) 3152{ 3153 area->vm_flags |= VM_RESERVED; 3154#ifdef ARCH_HAS_DMA_MMAP_COHERENT 3155 if (!substream->ops->page && 3156 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) 3157 return dma_mmap_coherent(substream->dma_buffer.dev.dev, 3158 area, 3159 substream->runtime->dma_area, 3160 substream->runtime->dma_addr, 3161 area->vm_end - area->vm_start); 3162#elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT) 3163 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV && 3164 !plat_device_is_coherent(substream->dma_buffer.dev.dev)) 3165 area->vm_page_prot = pgprot_noncached(area->vm_page_prot); 3166#endif /* ARCH_HAS_DMA_MMAP_COHERENT */ 3167 /* mmap with fault handler */ 3168 area->vm_ops = &snd_pcm_vm_ops_data_fault; 3169 return 0; 3170} 3171 3172/* 3173 * mmap the DMA buffer on I/O memory area 3174 */ 3175#if SNDRV_PCM_INFO_MMAP_IOMEM 3176int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, 3177 struct vm_area_struct *area) 3178{ 3179 long size; 3180 unsigned long offset; 3181 3182 area->vm_page_prot = pgprot_noncached(area->vm_page_prot); 3183 area->vm_flags |= VM_IO; 3184 size = area->vm_end - area->vm_start; 3185 offset = area->vm_pgoff << PAGE_SHIFT; 3186 if (io_remap_pfn_range(area, area->vm_start, 3187 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT, 3188 size, area->vm_page_prot)) 3189 return -EAGAIN; 3190 return 0; 3191} 3192 3193EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem); 3194#endif /* SNDRV_PCM_INFO_MMAP */ 3195 3196/* mmap callback with pgprot_noncached */ 3197int snd_pcm_lib_mmap_noncached(struct snd_pcm_substream *substream, 3198 struct vm_area_struct *area) 3199{ 3200 area->vm_page_prot = pgprot_noncached(area->vm_page_prot); 3201 return snd_pcm_default_mmap(substream, area); 3202} 3203EXPORT_SYMBOL(snd_pcm_lib_mmap_noncached); 3204 3205/* 3206 * mmap DMA buffer 3207 */ 3208int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, 3209 struct vm_area_struct *area) 3210{ 3211 struct snd_pcm_runtime *runtime; 3212 long size; 3213 unsigned long offset; 3214 size_t dma_bytes; 3215 int err; 3216 3217 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 3218 if (!(area->vm_flags & (VM_WRITE|VM_READ))) 3219 return -EINVAL; 3220 } else { 3221 if (!(area->vm_flags & VM_READ)) 3222 return -EINVAL; 3223 } 3224 runtime = substream->runtime; 3225 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 3226 return -EBADFD; 3227 if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) 3228 return -ENXIO; 3229 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || 3230 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) 3231 return -EINVAL; 3232 size = area->vm_end - area->vm_start; 3233 offset = area->vm_pgoff << PAGE_SHIFT; 3234 dma_bytes = PAGE_ALIGN(runtime->dma_bytes); 3235 if ((size_t)size > dma_bytes) 3236 return -EINVAL; 3237 if (offset > dma_bytes - size) 3238 return -EINVAL; 3239 3240 area->vm_ops = &snd_pcm_vm_ops_data; 3241 area->vm_private_data = substream; 3242 if (substream->ops->mmap) 3243 err = substream->ops->mmap(substream, area); 3244 else 3245 err = snd_pcm_default_mmap(substream, area); 3246 if (!err) 3247 atomic_inc(&substream->mmap_count); 3248 return err; 3249} 3250 3251EXPORT_SYMBOL(snd_pcm_mmap_data); 3252 3253static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area) 3254{ 3255 struct snd_pcm_file * pcm_file; 3256 struct snd_pcm_substream *substream; 3257 unsigned long offset; 3258 3259 pcm_file = file->private_data; 3260 substream = pcm_file->substream; 3261 if (PCM_RUNTIME_CHECK(substream)) 3262 return -ENXIO; 3263 3264 offset = area->vm_pgoff << PAGE_SHIFT; 3265 switch (offset) { 3266 case SNDRV_PCM_MMAP_OFFSET_STATUS: 3267 if (pcm_file->no_compat_mmap) 3268 return -ENXIO; 3269 return snd_pcm_mmap_status(substream, file, area); 3270 case SNDRV_PCM_MMAP_OFFSET_CONTROL: 3271 if (pcm_file->no_compat_mmap) 3272 return -ENXIO; 3273 return snd_pcm_mmap_control(substream, file, area); 3274 default: 3275 return snd_pcm_mmap_data(substream, file, area); 3276 } 3277 return 0; 3278} 3279 3280static int snd_pcm_fasync(int fd, struct file * file, int on) 3281{ 3282 struct snd_pcm_file * pcm_file; 3283 struct snd_pcm_substream *substream; 3284 struct snd_pcm_runtime *runtime; 3285 3286 pcm_file = file->private_data; 3287 substream = pcm_file->substream; 3288 if (PCM_RUNTIME_CHECK(substream)) 3289 return -ENXIO; 3290 runtime = substream->runtime; 3291 return fasync_helper(fd, file, on, &runtime->fasync); 3292} 3293 3294/* 3295 * ioctl32 compat 3296 */ 3297#ifdef CONFIG_COMPAT 3298#include "pcm_compat.c" 3299#else 3300#define snd_pcm_ioctl_compat NULL 3301#endif 3302 3303/* 3304 * To be removed helpers to keep binary compatibility 3305 */ 3306 3307#ifdef CONFIG_SND_SUPPORT_OLD_API 3308#define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5)) 3309#define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5)) 3310 3311static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params, 3312 struct snd_pcm_hw_params_old *oparams) 3313{ 3314 unsigned int i; 3315 3316 memset(params, 0, sizeof(*params)); 3317 params->flags = oparams->flags; 3318 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) 3319 params->masks[i].bits[0] = oparams->masks[i]; 3320 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals)); 3321 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask); 3322 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask); 3323 params->info = oparams->info; 3324 params->msbits = oparams->msbits; 3325 params->rate_num = oparams->rate_num; 3326 params->rate_den = oparams->rate_den; 3327 params->fifo_size = oparams->fifo_size; 3328} 3329 3330static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams, 3331 struct snd_pcm_hw_params *params) 3332{ 3333 unsigned int i; 3334 3335 memset(oparams, 0, sizeof(*oparams)); 3336 oparams->flags = params->flags; 3337 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) 3338 oparams->masks[i] = params->masks[i].bits[0]; 3339 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals)); 3340 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask); 3341 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask); 3342 oparams->info = params->info; 3343 oparams->msbits = params->msbits; 3344 oparams->rate_num = params->rate_num; 3345 oparams->rate_den = params->rate_den; 3346 oparams->fifo_size = params->fifo_size; 3347} 3348 3349static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, 3350 struct snd_pcm_hw_params_old __user * _oparams) 3351{ 3352 struct snd_pcm_hw_params *params; 3353 struct snd_pcm_hw_params_old *oparams = NULL; 3354 int err; 3355 3356 params = kmalloc(sizeof(*params), GFP_KERNEL); 3357 if (!params) 3358 return -ENOMEM; 3359 3360 oparams = memdup_user(_oparams, sizeof(*oparams)); 3361 if (IS_ERR(oparams)) { 3362 err = PTR_ERR(oparams); 3363 goto out; 3364 } 3365 snd_pcm_hw_convert_from_old_params(params, oparams); 3366 err = snd_pcm_hw_refine(substream, params); 3367 snd_pcm_hw_convert_to_old_params(oparams, params); 3368 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { 3369 if (!err) 3370 err = -EFAULT; 3371 } 3372 3373 kfree(oparams); 3374out: 3375 kfree(params); 3376 return err; 3377} 3378 3379static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, 3380 struct snd_pcm_hw_params_old __user * _oparams) 3381{ 3382 struct snd_pcm_hw_params *params; 3383 struct snd_pcm_hw_params_old *oparams = NULL; 3384 int err; 3385 3386 params = kmalloc(sizeof(*params), GFP_KERNEL); 3387 if (!params) 3388 return -ENOMEM; 3389 3390 oparams = memdup_user(_oparams, sizeof(*oparams)); 3391 if (IS_ERR(oparams)) { 3392 err = PTR_ERR(oparams); 3393 goto out; 3394 } 3395 snd_pcm_hw_convert_from_old_params(params, oparams); 3396 err = snd_pcm_hw_params(substream, params); 3397 snd_pcm_hw_convert_to_old_params(oparams, params); 3398 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { 3399 if (!err) 3400 err = -EFAULT; 3401 } 3402 3403 kfree(oparams); 3404out: 3405 kfree(params); 3406 return err; 3407} 3408#endif /* CONFIG_SND_SUPPORT_OLD_API */ 3409 3410#ifndef CONFIG_MMU 3411static unsigned long snd_pcm_get_unmapped_area(struct file *file, 3412 unsigned long addr, 3413 unsigned long len, 3414 unsigned long pgoff, 3415 unsigned long flags) 3416{ 3417 struct snd_pcm_file *pcm_file = file->private_data; 3418 struct snd_pcm_substream *substream = pcm_file->substream; 3419 struct snd_pcm_runtime *runtime = substream->runtime; 3420 unsigned long offset = pgoff << PAGE_SHIFT; 3421 3422 switch (offset) { 3423 case SNDRV_PCM_MMAP_OFFSET_STATUS: 3424 return (unsigned long)runtime->status; 3425 case SNDRV_PCM_MMAP_OFFSET_CONTROL: 3426 return (unsigned long)runtime->control; 3427 default: 3428 return (unsigned long)runtime->dma_area + offset; 3429 } 3430} 3431#else 3432# define snd_pcm_get_unmapped_area NULL 3433#endif 3434 3435/* 3436 * Register section 3437 */ 3438 3439const struct file_operations snd_pcm_f_ops[2] = { 3440 { 3441 .owner = THIS_MODULE, 3442 .write = snd_pcm_write, 3443 .aio_write = snd_pcm_aio_write, 3444 .open = snd_pcm_playback_open, 3445 .release = snd_pcm_release, 3446 .llseek = no_llseek, 3447 .poll = snd_pcm_playback_poll, 3448 .unlocked_ioctl = snd_pcm_playback_ioctl, 3449 .compat_ioctl = snd_pcm_ioctl_compat, 3450 .mmap = snd_pcm_mmap, 3451 .fasync = snd_pcm_fasync, 3452 .get_unmapped_area = snd_pcm_get_unmapped_area, 3453 }, 3454 { 3455 .owner = THIS_MODULE, 3456 .read = snd_pcm_read, 3457 .aio_read = snd_pcm_aio_read, 3458 .open = snd_pcm_capture_open, 3459 .release = snd_pcm_release, 3460 .llseek = no_llseek, 3461 .poll = snd_pcm_capture_poll, 3462 .unlocked_ioctl = snd_pcm_capture_ioctl, 3463 .compat_ioctl = snd_pcm_ioctl_compat, 3464 .mmap = snd_pcm_mmap, 3465 .fasync = snd_pcm_fasync, 3466 .get_unmapped_area = snd_pcm_get_unmapped_area, 3467 } 3468}; 3469