1 /* 2 * Digital Audio (PCM) abstract layer 3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 4 * 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 * 20 */ 21 22 #include <linux/mm.h> 23 #include <linux/module.h> 24 #include <linux/file.h> 25 #include <linux/slab.h> 26 #include <linux/time.h> 27 #include <linux/pm_qos.h> 28 #include <linux/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 46 struct 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 66 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, 67 struct snd_pcm_hw_params_old __user * _oparams); 68 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, 69 struct snd_pcm_hw_params_old __user * _oparams); 70 #endif 71 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream); 72 73 /* 74 * 75 */ 76 77 DEFINE_RWLOCK(snd_pcm_link_rwlock); 78 EXPORT_SYMBOL(snd_pcm_link_rwlock); 79 80 static DECLARE_RWSEM(snd_pcm_link_rwsem); 81 82 static 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 89 static inline void snd_leave_user(mm_segment_t fs) 90 { 91 set_fs(fs); 92 } 93 94 95 96 int 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 /* AB: FIXME!!! This is definitely nonsense */ 116 if (runtime) { 117 info->sync = runtime->sync; 118 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info); 119 } 120 return 0; 121 } 122 123 int snd_pcm_info_user(struct snd_pcm_substream *substream, 124 struct snd_pcm_info __user * _info) 125 { 126 struct snd_pcm_info *info; 127 int err; 128 129 info = kmalloc(sizeof(*info), GFP_KERNEL); 130 if (! info) 131 return -ENOMEM; 132 err = snd_pcm_info(substream, info); 133 if (err >= 0) { 134 if (copy_to_user(_info, info, sizeof(*info))) 135 err = -EFAULT; 136 } 137 kfree(info); 138 return err; 139 } 140 141 #undef RULES_DEBUG 142 143 #ifdef RULES_DEBUG 144 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v 145 static const char * const snd_pcm_hw_param_names[] = { 146 HW_PARAM(ACCESS), 147 HW_PARAM(FORMAT), 148 HW_PARAM(SUBFORMAT), 149 HW_PARAM(SAMPLE_BITS), 150 HW_PARAM(FRAME_BITS), 151 HW_PARAM(CHANNELS), 152 HW_PARAM(RATE), 153 HW_PARAM(PERIOD_TIME), 154 HW_PARAM(PERIOD_SIZE), 155 HW_PARAM(PERIOD_BYTES), 156 HW_PARAM(PERIODS), 157 HW_PARAM(BUFFER_TIME), 158 HW_PARAM(BUFFER_SIZE), 159 HW_PARAM(BUFFER_BYTES), 160 HW_PARAM(TICK_TIME), 161 }; 162 #endif 163 164 int snd_pcm_hw_refine(struct snd_pcm_substream *substream, 165 struct snd_pcm_hw_params *params) 166 { 167 unsigned int k; 168 struct snd_pcm_hardware *hw; 169 struct snd_interval *i = NULL; 170 struct snd_mask *m = NULL; 171 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints; 172 unsigned int rstamps[constrs->rules_num]; 173 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1]; 174 unsigned int stamp = 2; 175 int changed, again; 176 177 params->info = 0; 178 params->fifo_size = 0; 179 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS)) 180 params->msbits = 0; 181 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) { 182 params->rate_num = 0; 183 params->rate_den = 0; 184 } 185 186 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { 187 m = hw_param_mask(params, k); 188 if (snd_mask_empty(m)) 189 return -EINVAL; 190 if (!(params->rmask & (1 << k))) 191 continue; 192 #ifdef RULES_DEBUG 193 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]); 194 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); 195 #endif 196 changed = snd_mask_refine(m, constrs_mask(constrs, k)); 197 #ifdef RULES_DEBUG 198 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); 199 #endif 200 if (changed) 201 params->cmask |= 1 << k; 202 if (changed < 0) 203 return changed; 204 } 205 206 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { 207 i = hw_param_interval(params, k); 208 if (snd_interval_empty(i)) 209 return -EINVAL; 210 if (!(params->rmask & (1 << k))) 211 continue; 212 #ifdef RULES_DEBUG 213 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]); 214 if (i->empty) 215 printk("empty"); 216 else 217 printk("%c%u %u%c", 218 i->openmin ? '(' : '[', i->min, 219 i->max, i->openmax ? ')' : ']'); 220 printk(" -> "); 221 #endif 222 changed = snd_interval_refine(i, constrs_interval(constrs, k)); 223 #ifdef RULES_DEBUG 224 if (i->empty) 225 printk("empty\n"); 226 else 227 printk("%c%u %u%c\n", 228 i->openmin ? '(' : '[', i->min, 229 i->max, i->openmax ? ')' : ']'); 230 #endif 231 if (changed) 232 params->cmask |= 1 << k; 233 if (changed < 0) 234 return changed; 235 } 236 237 for (k = 0; k < constrs->rules_num; k++) 238 rstamps[k] = 0; 239 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) 240 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0; 241 do { 242 again = 0; 243 for (k = 0; k < constrs->rules_num; k++) { 244 struct snd_pcm_hw_rule *r = &constrs->rules[k]; 245 unsigned int d; 246 int doit = 0; 247 if (r->cond && !(r->cond & params->flags)) 248 continue; 249 for (d = 0; r->deps[d] >= 0; d++) { 250 if (vstamps[r->deps[d]] > rstamps[k]) { 251 doit = 1; 252 break; 253 } 254 } 255 if (!doit) 256 continue; 257 #ifdef RULES_DEBUG 258 printk(KERN_DEBUG "Rule %d [%p]: ", k, r->func); 259 if (r->var >= 0) { 260 printk("%s = ", snd_pcm_hw_param_names[r->var]); 261 if (hw_is_mask(r->var)) { 262 m = hw_param_mask(params, r->var); 263 printk("%x", *m->bits); 264 } else { 265 i = hw_param_interval(params, r->var); 266 if (i->empty) 267 printk("empty"); 268 else 269 printk("%c%u %u%c", 270 i->openmin ? '(' : '[', i->min, 271 i->max, i->openmax ? ')' : ']'); 272 } 273 } 274 #endif 275 changed = r->func(params, r); 276 #ifdef RULES_DEBUG 277 if (r->var >= 0) { 278 printk(" -> "); 279 if (hw_is_mask(r->var)) 280 printk("%x", *m->bits); 281 else { 282 if (i->empty) 283 printk("empty"); 284 else 285 printk("%c%u %u%c", 286 i->openmin ? '(' : '[', i->min, 287 i->max, i->openmax ? ')' : ']'); 288 } 289 } 290 printk("\n"); 291 #endif 292 rstamps[k] = stamp; 293 if (changed && r->var >= 0) { 294 params->cmask |= (1 << r->var); 295 vstamps[r->var] = stamp; 296 again = 1; 297 } 298 if (changed < 0) 299 return changed; 300 stamp++; 301 } 302 } while (again); 303 if (!params->msbits) { 304 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); 305 if (snd_interval_single(i)) 306 params->msbits = snd_interval_value(i); 307 } 308 309 if (!params->rate_den) { 310 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); 311 if (snd_interval_single(i)) { 312 params->rate_num = snd_interval_value(i); 313 params->rate_den = 1; 314 } 315 } 316 317 hw = &substream->runtime->hw; 318 if (!params->info) 319 params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES; 320 if (!params->fifo_size) { 321 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 322 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 323 if (snd_mask_min(m) == snd_mask_max(m) && 324 snd_interval_min(i) == snd_interval_max(i)) { 325 changed = substream->ops->ioctl(substream, 326 SNDRV_PCM_IOCTL1_FIFO_SIZE, params); 327 if (changed < 0) 328 return changed; 329 } 330 } 331 params->rmask = 0; 332 return 0; 333 } 334 335 EXPORT_SYMBOL(snd_pcm_hw_refine); 336 337 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream, 338 struct snd_pcm_hw_params __user * _params) 339 { 340 struct snd_pcm_hw_params *params; 341 int err; 342 343 params = memdup_user(_params, sizeof(*params)); 344 if (IS_ERR(params)) 345 return PTR_ERR(params); 346 347 err = snd_pcm_hw_refine(substream, params); 348 if (copy_to_user(_params, params, sizeof(*params))) { 349 if (!err) 350 err = -EFAULT; 351 } 352 353 kfree(params); 354 return err; 355 } 356 357 static int period_to_usecs(struct snd_pcm_runtime *runtime) 358 { 359 int usecs; 360 361 if (! runtime->rate) 362 return -1; /* invalid */ 363 364 /* take 75% of period time as the deadline */ 365 usecs = (750000 / runtime->rate) * runtime->period_size; 366 usecs += ((750000 % runtime->rate) * runtime->period_size) / 367 runtime->rate; 368 369 return usecs; 370 } 371 372 static int snd_pcm_hw_params(struct snd_pcm_substream *substream, 373 struct snd_pcm_hw_params *params) 374 { 375 struct snd_pcm_runtime *runtime; 376 int err, usecs; 377 unsigned int bits; 378 snd_pcm_uframes_t frames; 379 380 if (PCM_RUNTIME_CHECK(substream)) 381 return -ENXIO; 382 runtime = substream->runtime; 383 snd_pcm_stream_lock_irq(substream); 384 switch (runtime->status->state) { 385 case SNDRV_PCM_STATE_OPEN: 386 case SNDRV_PCM_STATE_SETUP: 387 case SNDRV_PCM_STATE_PREPARED: 388 break; 389 default: 390 snd_pcm_stream_unlock_irq(substream); 391 return -EBADFD; 392 } 393 snd_pcm_stream_unlock_irq(substream); 394 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 395 if (!substream->oss.oss) 396 #endif 397 if (atomic_read(&substream->mmap_count)) 398 return -EBADFD; 399 400 params->rmask = ~0U; 401 err = snd_pcm_hw_refine(substream, params); 402 if (err < 0) 403 goto _error; 404 405 err = snd_pcm_hw_params_choose(substream, params); 406 if (err < 0) 407 goto _error; 408 409 if (substream->ops->hw_params != NULL) { 410 err = substream->ops->hw_params(substream, params); 411 if (err < 0) 412 goto _error; 413 } 414 415 runtime->access = params_access(params); 416 runtime->format = params_format(params); 417 runtime->subformat = params_subformat(params); 418 runtime->channels = params_channels(params); 419 runtime->rate = params_rate(params); 420 runtime->period_size = params_period_size(params); 421 runtime->periods = params_periods(params); 422 runtime->buffer_size = params_buffer_size(params); 423 runtime->info = params->info; 424 runtime->rate_num = params->rate_num; 425 runtime->rate_den = params->rate_den; 426 runtime->no_period_wakeup = 427 (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) && 428 (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP); 429 430 bits = snd_pcm_format_physical_width(runtime->format); 431 runtime->sample_bits = bits; 432 bits *= runtime->channels; 433 runtime->frame_bits = bits; 434 frames = 1; 435 while (bits % 8 != 0) { 436 bits *= 2; 437 frames *= 2; 438 } 439 runtime->byte_align = bits / 8; 440 runtime->min_align = frames; 441 442 /* Default sw params */ 443 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; 444 runtime->period_step = 1; 445 runtime->control->avail_min = runtime->period_size; 446 runtime->start_threshold = 1; 447 runtime->stop_threshold = runtime->buffer_size; 448 runtime->silence_threshold = 0; 449 runtime->silence_size = 0; 450 runtime->boundary = runtime->buffer_size; 451 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size) 452 runtime->boundary *= 2; 453 454 snd_pcm_timer_resolution_change(substream); 455 runtime->status->state = SNDRV_PCM_STATE_SETUP; 456 457 if (pm_qos_request_active(&substream->latency_pm_qos_req)) 458 pm_qos_remove_request(&substream->latency_pm_qos_req); 459 if ((usecs = period_to_usecs(runtime)) >= 0) 460 pm_qos_add_request(&substream->latency_pm_qos_req, 461 PM_QOS_CPU_DMA_LATENCY, usecs); 462 return 0; 463 _error: 464 /* hardware might be unusable from this time, 465 so we force application to retry to set 466 the correct hardware parameter settings */ 467 runtime->status->state = SNDRV_PCM_STATE_OPEN; 468 if (substream->ops->hw_free != NULL) 469 substream->ops->hw_free(substream); 470 return err; 471 } 472 473 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream, 474 struct snd_pcm_hw_params __user * _params) 475 { 476 struct snd_pcm_hw_params *params; 477 int err; 478 479 params = memdup_user(_params, sizeof(*params)); 480 if (IS_ERR(params)) 481 return PTR_ERR(params); 482 483 err = snd_pcm_hw_params(substream, params); 484 if (copy_to_user(_params, params, sizeof(*params))) { 485 if (!err) 486 err = -EFAULT; 487 } 488 489 kfree(params); 490 return err; 491 } 492 493 static int snd_pcm_hw_free(struct snd_pcm_substream *substream) 494 { 495 struct snd_pcm_runtime *runtime; 496 int result = 0; 497 498 if (PCM_RUNTIME_CHECK(substream)) 499 return -ENXIO; 500 runtime = substream->runtime; 501 snd_pcm_stream_lock_irq(substream); 502 switch (runtime->status->state) { 503 case SNDRV_PCM_STATE_SETUP: 504 case SNDRV_PCM_STATE_PREPARED: 505 break; 506 default: 507 snd_pcm_stream_unlock_irq(substream); 508 return -EBADFD; 509 } 510 snd_pcm_stream_unlock_irq(substream); 511 if (atomic_read(&substream->mmap_count)) 512 return -EBADFD; 513 if (substream->ops->hw_free) 514 result = substream->ops->hw_free(substream); 515 runtime->status->state = SNDRV_PCM_STATE_OPEN; 516 pm_qos_remove_request(&substream->latency_pm_qos_req); 517 return result; 518 } 519 520 static int snd_pcm_sw_params(struct snd_pcm_substream *substream, 521 struct snd_pcm_sw_params *params) 522 { 523 struct snd_pcm_runtime *runtime; 524 int err; 525 526 if (PCM_RUNTIME_CHECK(substream)) 527 return -ENXIO; 528 runtime = substream->runtime; 529 snd_pcm_stream_lock_irq(substream); 530 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 531 snd_pcm_stream_unlock_irq(substream); 532 return -EBADFD; 533 } 534 snd_pcm_stream_unlock_irq(substream); 535 536 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST) 537 return -EINVAL; 538 if (params->avail_min == 0) 539 return -EINVAL; 540 if (params->silence_size >= runtime->boundary) { 541 if (params->silence_threshold != 0) 542 return -EINVAL; 543 } else { 544 if (params->silence_size > params->silence_threshold) 545 return -EINVAL; 546 if (params->silence_threshold > runtime->buffer_size) 547 return -EINVAL; 548 } 549 err = 0; 550 snd_pcm_stream_lock_irq(substream); 551 runtime->tstamp_mode = params->tstamp_mode; 552 runtime->period_step = params->period_step; 553 runtime->control->avail_min = params->avail_min; 554 runtime->start_threshold = params->start_threshold; 555 runtime->stop_threshold = params->stop_threshold; 556 runtime->silence_threshold = params->silence_threshold; 557 runtime->silence_size = params->silence_size; 558 params->boundary = runtime->boundary; 559 if (snd_pcm_running(substream)) { 560 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 561 runtime->silence_size > 0) 562 snd_pcm_playback_silence(substream, ULONG_MAX); 563 err = snd_pcm_update_state(substream, runtime); 564 } 565 snd_pcm_stream_unlock_irq(substream); 566 return err; 567 } 568 569 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream, 570 struct snd_pcm_sw_params __user * _params) 571 { 572 struct snd_pcm_sw_params params; 573 int err; 574 if (copy_from_user(¶ms, _params, sizeof(params))) 575 return -EFAULT; 576 err = snd_pcm_sw_params(substream, ¶ms); 577 if (copy_to_user(_params, ¶ms, sizeof(params))) 578 return -EFAULT; 579 return err; 580 } 581 582 int snd_pcm_status(struct snd_pcm_substream *substream, 583 struct snd_pcm_status *status) 584 { 585 struct snd_pcm_runtime *runtime = substream->runtime; 586 587 snd_pcm_stream_lock_irq(substream); 588 status->state = runtime->status->state; 589 status->suspended_state = runtime->status->suspended_state; 590 if (status->state == SNDRV_PCM_STATE_OPEN) 591 goto _end; 592 status->trigger_tstamp = runtime->trigger_tstamp; 593 if (snd_pcm_running(substream)) { 594 snd_pcm_update_hw_ptr(substream); 595 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { 596 status->tstamp = runtime->status->tstamp; 597 goto _tstamp_end; 598 } 599 } 600 snd_pcm_gettime(runtime, &status->tstamp); 601 _tstamp_end: 602 status->appl_ptr = runtime->control->appl_ptr; 603 status->hw_ptr = runtime->status->hw_ptr; 604 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 605 status->avail = snd_pcm_playback_avail(runtime); 606 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING || 607 runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 608 status->delay = runtime->buffer_size - status->avail; 609 status->delay += runtime->delay; 610 } else 611 status->delay = 0; 612 } else { 613 status->avail = snd_pcm_capture_avail(runtime); 614 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) 615 status->delay = status->avail + runtime->delay; 616 else 617 status->delay = 0; 618 } 619 status->avail_max = runtime->avail_max; 620 status->overrange = runtime->overrange; 621 runtime->avail_max = 0; 622 runtime->overrange = 0; 623 _end: 624 snd_pcm_stream_unlock_irq(substream); 625 return 0; 626 } 627 628 static int snd_pcm_status_user(struct snd_pcm_substream *substream, 629 struct snd_pcm_status __user * _status) 630 { 631 struct snd_pcm_status status; 632 int res; 633 634 memset(&status, 0, sizeof(status)); 635 res = snd_pcm_status(substream, &status); 636 if (res < 0) 637 return res; 638 if (copy_to_user(_status, &status, sizeof(status))) 639 return -EFAULT; 640 return 0; 641 } 642 643 static int snd_pcm_channel_info(struct snd_pcm_substream *substream, 644 struct snd_pcm_channel_info * info) 645 { 646 struct snd_pcm_runtime *runtime; 647 unsigned int channel; 648 649 channel = info->channel; 650 runtime = substream->runtime; 651 snd_pcm_stream_lock_irq(substream); 652 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 653 snd_pcm_stream_unlock_irq(substream); 654 return -EBADFD; 655 } 656 snd_pcm_stream_unlock_irq(substream); 657 if (channel >= runtime->channels) 658 return -EINVAL; 659 memset(info, 0, sizeof(*info)); 660 info->channel = channel; 661 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info); 662 } 663 664 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream, 665 struct snd_pcm_channel_info __user * _info) 666 { 667 struct snd_pcm_channel_info info; 668 int res; 669 670 if (copy_from_user(&info, _info, sizeof(info))) 671 return -EFAULT; 672 res = snd_pcm_channel_info(substream, &info); 673 if (res < 0) 674 return res; 675 if (copy_to_user(_info, &info, sizeof(info))) 676 return -EFAULT; 677 return 0; 678 } 679 680 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream) 681 { 682 struct snd_pcm_runtime *runtime = substream->runtime; 683 if (runtime->trigger_master == NULL) 684 return; 685 if (runtime->trigger_master == substream) { 686 snd_pcm_gettime(runtime, &runtime->trigger_tstamp); 687 } else { 688 snd_pcm_trigger_tstamp(runtime->trigger_master); 689 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp; 690 } 691 runtime->trigger_master = NULL; 692 } 693 694 struct action_ops { 695 int (*pre_action)(struct snd_pcm_substream *substream, int state); 696 int (*do_action)(struct snd_pcm_substream *substream, int state); 697 void (*undo_action)(struct snd_pcm_substream *substream, int state); 698 void (*post_action)(struct snd_pcm_substream *substream, int state); 699 }; 700 701 /* 702 * this functions is core for handling of linked stream 703 * Note: the stream state might be changed also on failure 704 * Note2: call with calling stream lock + link lock 705 */ 706 static int snd_pcm_action_group(struct action_ops *ops, 707 struct snd_pcm_substream *substream, 708 int state, int do_lock) 709 { 710 struct snd_pcm_substream *s = NULL; 711 struct snd_pcm_substream *s1; 712 int res = 0; 713 714 snd_pcm_group_for_each_entry(s, substream) { 715 if (do_lock && s != substream) 716 spin_lock_nested(&s->self_group.lock, 717 SINGLE_DEPTH_NESTING); 718 res = ops->pre_action(s, state); 719 if (res < 0) 720 goto _unlock; 721 } 722 snd_pcm_group_for_each_entry(s, substream) { 723 res = ops->do_action(s, state); 724 if (res < 0) { 725 if (ops->undo_action) { 726 snd_pcm_group_for_each_entry(s1, substream) { 727 if (s1 == s) /* failed stream */ 728 break; 729 ops->undo_action(s1, state); 730 } 731 } 732 s = NULL; /* unlock all */ 733 goto _unlock; 734 } 735 } 736 snd_pcm_group_for_each_entry(s, substream) { 737 ops->post_action(s, state); 738 } 739 _unlock: 740 if (do_lock) { 741 /* unlock streams */ 742 snd_pcm_group_for_each_entry(s1, substream) { 743 if (s1 != substream) 744 spin_unlock(&s1->self_group.lock); 745 if (s1 == s) /* end */ 746 break; 747 } 748 } 749 return res; 750 } 751 752 /* 753 * Note: call with stream lock 754 */ 755 static int snd_pcm_action_single(struct action_ops *ops, 756 struct snd_pcm_substream *substream, 757 int state) 758 { 759 int res; 760 761 res = ops->pre_action(substream, state); 762 if (res < 0) 763 return res; 764 res = ops->do_action(substream, state); 765 if (res == 0) 766 ops->post_action(substream, state); 767 else if (ops->undo_action) 768 ops->undo_action(substream, state); 769 return res; 770 } 771 772 /* 773 * Note: call with stream lock 774 */ 775 static int snd_pcm_action(struct action_ops *ops, 776 struct snd_pcm_substream *substream, 777 int state) 778 { 779 int res; 780 781 if (snd_pcm_stream_linked(substream)) { 782 if (!spin_trylock(&substream->group->lock)) { 783 spin_unlock(&substream->self_group.lock); 784 spin_lock(&substream->group->lock); 785 spin_lock(&substream->self_group.lock); 786 } 787 res = snd_pcm_action_group(ops, substream, state, 1); 788 spin_unlock(&substream->group->lock); 789 } else { 790 res = snd_pcm_action_single(ops, substream, state); 791 } 792 return res; 793 } 794 795 /* 796 * Note: don't use any locks before 797 */ 798 static int snd_pcm_action_lock_irq(struct action_ops *ops, 799 struct snd_pcm_substream *substream, 800 int state) 801 { 802 int res; 803 804 read_lock_irq(&snd_pcm_link_rwlock); 805 if (snd_pcm_stream_linked(substream)) { 806 spin_lock(&substream->group->lock); 807 spin_lock(&substream->self_group.lock); 808 res = snd_pcm_action_group(ops, substream, state, 1); 809 spin_unlock(&substream->self_group.lock); 810 spin_unlock(&substream->group->lock); 811 } else { 812 spin_lock(&substream->self_group.lock); 813 res = snd_pcm_action_single(ops, substream, state); 814 spin_unlock(&substream->self_group.lock); 815 } 816 read_unlock_irq(&snd_pcm_link_rwlock); 817 return res; 818 } 819 820 /* 821 */ 822 static int snd_pcm_action_nonatomic(struct action_ops *ops, 823 struct snd_pcm_substream *substream, 824 int state) 825 { 826 int res; 827 828 down_read(&snd_pcm_link_rwsem); 829 if (snd_pcm_stream_linked(substream)) 830 res = snd_pcm_action_group(ops, substream, state, 0); 831 else 832 res = snd_pcm_action_single(ops, substream, state); 833 up_read(&snd_pcm_link_rwsem); 834 return res; 835 } 836 837 /* 838 * start callbacks 839 */ 840 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state) 841 { 842 struct snd_pcm_runtime *runtime = substream->runtime; 843 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED) 844 return -EBADFD; 845 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 846 !snd_pcm_playback_data(substream)) 847 return -EPIPE; 848 runtime->trigger_master = substream; 849 return 0; 850 } 851 852 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state) 853 { 854 if (substream->runtime->trigger_master != substream) 855 return 0; 856 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START); 857 } 858 859 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state) 860 { 861 if (substream->runtime->trigger_master == substream) 862 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); 863 } 864 865 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state) 866 { 867 struct snd_pcm_runtime *runtime = substream->runtime; 868 snd_pcm_trigger_tstamp(substream); 869 runtime->hw_ptr_jiffies = jiffies; 870 runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) / 871 runtime->rate; 872 runtime->status->state = state; 873 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 874 runtime->silence_size > 0) 875 snd_pcm_playback_silence(substream, ULONG_MAX); 876 if (substream->timer) 877 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART, 878 &runtime->trigger_tstamp); 879 } 880 881 static struct action_ops snd_pcm_action_start = { 882 .pre_action = snd_pcm_pre_start, 883 .do_action = snd_pcm_do_start, 884 .undo_action = snd_pcm_undo_start, 885 .post_action = snd_pcm_post_start 886 }; 887 888 /** 889 * snd_pcm_start - start all linked streams 890 * @substream: the PCM substream instance 891 */ 892 int snd_pcm_start(struct snd_pcm_substream *substream) 893 { 894 return snd_pcm_action(&snd_pcm_action_start, substream, 895 SNDRV_PCM_STATE_RUNNING); 896 } 897 898 /* 899 * stop callbacks 900 */ 901 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state) 902 { 903 struct snd_pcm_runtime *runtime = substream->runtime; 904 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 905 return -EBADFD; 906 runtime->trigger_master = substream; 907 return 0; 908 } 909 910 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state) 911 { 912 if (substream->runtime->trigger_master == substream && 913 snd_pcm_running(substream)) 914 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); 915 return 0; /* unconditonally stop all substreams */ 916 } 917 918 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state) 919 { 920 struct snd_pcm_runtime *runtime = substream->runtime; 921 if (runtime->status->state != state) { 922 snd_pcm_trigger_tstamp(substream); 923 if (substream->timer) 924 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP, 925 &runtime->trigger_tstamp); 926 runtime->status->state = state; 927 } 928 wake_up(&runtime->sleep); 929 wake_up(&runtime->tsleep); 930 } 931 932 static struct action_ops snd_pcm_action_stop = { 933 .pre_action = snd_pcm_pre_stop, 934 .do_action = snd_pcm_do_stop, 935 .post_action = snd_pcm_post_stop 936 }; 937 938 /** 939 * snd_pcm_stop - try to stop all running streams in the substream group 940 * @substream: the PCM substream instance 941 * @state: PCM state after stopping the stream 942 * 943 * The state of each stream is then changed to the given state unconditionally. 944 */ 945 int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state) 946 { 947 return snd_pcm_action(&snd_pcm_action_stop, substream, state); 948 } 949 950 EXPORT_SYMBOL(snd_pcm_stop); 951 952 /** 953 * snd_pcm_drain_done - stop the DMA only when the given stream is playback 954 * @substream: the PCM substream 955 * 956 * After stopping, the state is changed to SETUP. 957 * Unlike snd_pcm_stop(), this affects only the given stream. 958 */ 959 int snd_pcm_drain_done(struct snd_pcm_substream *substream) 960 { 961 return snd_pcm_action_single(&snd_pcm_action_stop, substream, 962 SNDRV_PCM_STATE_SETUP); 963 } 964 965 /* 966 * pause callbacks 967 */ 968 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push) 969 { 970 struct snd_pcm_runtime *runtime = substream->runtime; 971 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE)) 972 return -ENOSYS; 973 if (push) { 974 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING) 975 return -EBADFD; 976 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED) 977 return -EBADFD; 978 runtime->trigger_master = substream; 979 return 0; 980 } 981 982 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push) 983 { 984 if (substream->runtime->trigger_master != substream) 985 return 0; 986 /* some drivers might use hw_ptr to recover from the pause - 987 update the hw_ptr now */ 988 if (push) 989 snd_pcm_update_hw_ptr(substream); 990 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by 991 * a delta between the current jiffies, this gives a large enough 992 * delta, effectively to skip the check once. 993 */ 994 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000; 995 return substream->ops->trigger(substream, 996 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH : 997 SNDRV_PCM_TRIGGER_PAUSE_RELEASE); 998 } 999 1000 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push) 1001 { 1002 if (substream->runtime->trigger_master == substream) 1003 substream->ops->trigger(substream, 1004 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE : 1005 SNDRV_PCM_TRIGGER_PAUSE_PUSH); 1006 } 1007 1008 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push) 1009 { 1010 struct snd_pcm_runtime *runtime = substream->runtime; 1011 snd_pcm_trigger_tstamp(substream); 1012 if (push) { 1013 runtime->status->state = SNDRV_PCM_STATE_PAUSED; 1014 if (substream->timer) 1015 snd_timer_notify(substream->timer, 1016 SNDRV_TIMER_EVENT_MPAUSE, 1017 &runtime->trigger_tstamp); 1018 wake_up(&runtime->sleep); 1019 wake_up(&runtime->tsleep); 1020 } else { 1021 runtime->status->state = SNDRV_PCM_STATE_RUNNING; 1022 if (substream->timer) 1023 snd_timer_notify(substream->timer, 1024 SNDRV_TIMER_EVENT_MCONTINUE, 1025 &runtime->trigger_tstamp); 1026 } 1027 } 1028 1029 static struct action_ops snd_pcm_action_pause = { 1030 .pre_action = snd_pcm_pre_pause, 1031 .do_action = snd_pcm_do_pause, 1032 .undo_action = snd_pcm_undo_pause, 1033 .post_action = snd_pcm_post_pause 1034 }; 1035 1036 /* 1037 * Push/release the pause for all linked streams. 1038 */ 1039 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push) 1040 { 1041 return snd_pcm_action(&snd_pcm_action_pause, substream, push); 1042 } 1043 1044 #ifdef CONFIG_PM 1045 /* suspend */ 1046 1047 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state) 1048 { 1049 struct snd_pcm_runtime *runtime = substream->runtime; 1050 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1051 return -EBUSY; 1052 runtime->trigger_master = substream; 1053 return 0; 1054 } 1055 1056 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state) 1057 { 1058 struct snd_pcm_runtime *runtime = substream->runtime; 1059 if (runtime->trigger_master != substream) 1060 return 0; 1061 if (! snd_pcm_running(substream)) 1062 return 0; 1063 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); 1064 return 0; /* suspend unconditionally */ 1065 } 1066 1067 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state) 1068 { 1069 struct snd_pcm_runtime *runtime = substream->runtime; 1070 snd_pcm_trigger_tstamp(substream); 1071 if (substream->timer) 1072 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND, 1073 &runtime->trigger_tstamp); 1074 runtime->status->suspended_state = runtime->status->state; 1075 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED; 1076 wake_up(&runtime->sleep); 1077 wake_up(&runtime->tsleep); 1078 } 1079 1080 static struct action_ops snd_pcm_action_suspend = { 1081 .pre_action = snd_pcm_pre_suspend, 1082 .do_action = snd_pcm_do_suspend, 1083 .post_action = snd_pcm_post_suspend 1084 }; 1085 1086 /** 1087 * snd_pcm_suspend - trigger SUSPEND to all linked streams 1088 * @substream: the PCM substream 1089 * 1090 * After this call, all streams are changed to SUSPENDED state. 1091 */ 1092 int snd_pcm_suspend(struct snd_pcm_substream *substream) 1093 { 1094 int err; 1095 unsigned long flags; 1096 1097 if (! substream) 1098 return 0; 1099 1100 snd_pcm_stream_lock_irqsave(substream, flags); 1101 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0); 1102 snd_pcm_stream_unlock_irqrestore(substream, flags); 1103 return err; 1104 } 1105 1106 EXPORT_SYMBOL(snd_pcm_suspend); 1107 1108 /** 1109 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm 1110 * @pcm: the PCM instance 1111 * 1112 * After this call, all streams are changed to SUSPENDED state. 1113 */ 1114 int snd_pcm_suspend_all(struct snd_pcm *pcm) 1115 { 1116 struct snd_pcm_substream *substream; 1117 int stream, err = 0; 1118 1119 if (! pcm) 1120 return 0; 1121 1122 for (stream = 0; stream < 2; stream++) { 1123 for (substream = pcm->streams[stream].substream; 1124 substream; substream = substream->next) { 1125 /* FIXME: the open/close code should lock this as well */ 1126 if (substream->runtime == NULL) 1127 continue; 1128 err = snd_pcm_suspend(substream); 1129 if (err < 0 && err != -EBUSY) 1130 return err; 1131 } 1132 } 1133 return 0; 1134 } 1135 1136 EXPORT_SYMBOL(snd_pcm_suspend_all); 1137 1138 /* resume */ 1139 1140 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state) 1141 { 1142 struct snd_pcm_runtime *runtime = substream->runtime; 1143 if (!(runtime->info & SNDRV_PCM_INFO_RESUME)) 1144 return -ENOSYS; 1145 runtime->trigger_master = substream; 1146 return 0; 1147 } 1148 1149 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state) 1150 { 1151 struct snd_pcm_runtime *runtime = substream->runtime; 1152 if (runtime->trigger_master != substream) 1153 return 0; 1154 /* DMA not running previously? */ 1155 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING && 1156 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING || 1157 substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) 1158 return 0; 1159 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME); 1160 } 1161 1162 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state) 1163 { 1164 if (substream->runtime->trigger_master == substream && 1165 snd_pcm_running(substream)) 1166 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); 1167 } 1168 1169 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state) 1170 { 1171 struct snd_pcm_runtime *runtime = substream->runtime; 1172 snd_pcm_trigger_tstamp(substream); 1173 if (substream->timer) 1174 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME, 1175 &runtime->trigger_tstamp); 1176 runtime->status->state = runtime->status->suspended_state; 1177 } 1178 1179 static struct action_ops snd_pcm_action_resume = { 1180 .pre_action = snd_pcm_pre_resume, 1181 .do_action = snd_pcm_do_resume, 1182 .undo_action = snd_pcm_undo_resume, 1183 .post_action = snd_pcm_post_resume 1184 }; 1185 1186 static int snd_pcm_resume(struct snd_pcm_substream *substream) 1187 { 1188 struct snd_card *card = substream->pcm->card; 1189 int res; 1190 1191 snd_power_lock(card); 1192 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) 1193 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0); 1194 snd_power_unlock(card); 1195 return res; 1196 } 1197 1198 #else 1199 1200 static int snd_pcm_resume(struct snd_pcm_substream *substream) 1201 { 1202 return -ENOSYS; 1203 } 1204 1205 #endif /* CONFIG_PM */ 1206 1207 /* 1208 * xrun ioctl 1209 * 1210 * Change the RUNNING stream(s) to XRUN state. 1211 */ 1212 static int snd_pcm_xrun(struct snd_pcm_substream *substream) 1213 { 1214 struct snd_card *card = substream->pcm->card; 1215 struct snd_pcm_runtime *runtime = substream->runtime; 1216 int result; 1217 1218 snd_power_lock(card); 1219 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1220 result = snd_power_wait(card, SNDRV_CTL_POWER_D0); 1221 if (result < 0) 1222 goto _unlock; 1223 } 1224 1225 snd_pcm_stream_lock_irq(substream); 1226 switch (runtime->status->state) { 1227 case SNDRV_PCM_STATE_XRUN: 1228 result = 0; /* already there */ 1229 break; 1230 case SNDRV_PCM_STATE_RUNNING: 1231 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); 1232 break; 1233 default: 1234 result = -EBADFD; 1235 } 1236 snd_pcm_stream_unlock_irq(substream); 1237 _unlock: 1238 snd_power_unlock(card); 1239 return result; 1240 } 1241 1242 /* 1243 * reset ioctl 1244 */ 1245 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state) 1246 { 1247 struct snd_pcm_runtime *runtime = substream->runtime; 1248 switch (runtime->status->state) { 1249 case SNDRV_PCM_STATE_RUNNING: 1250 case SNDRV_PCM_STATE_PREPARED: 1251 case SNDRV_PCM_STATE_PAUSED: 1252 case SNDRV_PCM_STATE_SUSPENDED: 1253 return 0; 1254 default: 1255 return -EBADFD; 1256 } 1257 } 1258 1259 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state) 1260 { 1261 struct snd_pcm_runtime *runtime = substream->runtime; 1262 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL); 1263 if (err < 0) 1264 return err; 1265 runtime->hw_ptr_base = 0; 1266 runtime->hw_ptr_interrupt = runtime->status->hw_ptr - 1267 runtime->status->hw_ptr % runtime->period_size; 1268 runtime->silence_start = runtime->status->hw_ptr; 1269 runtime->silence_filled = 0; 1270 return 0; 1271 } 1272 1273 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state) 1274 { 1275 struct snd_pcm_runtime *runtime = substream->runtime; 1276 runtime->control->appl_ptr = runtime->status->hw_ptr; 1277 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 1278 runtime->silence_size > 0) 1279 snd_pcm_playback_silence(substream, ULONG_MAX); 1280 } 1281 1282 static struct action_ops snd_pcm_action_reset = { 1283 .pre_action = snd_pcm_pre_reset, 1284 .do_action = snd_pcm_do_reset, 1285 .post_action = snd_pcm_post_reset 1286 }; 1287 1288 static int snd_pcm_reset(struct snd_pcm_substream *substream) 1289 { 1290 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0); 1291 } 1292 1293 /* 1294 * prepare ioctl 1295 */ 1296 /* we use the second argument for updating f_flags */ 1297 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream, 1298 int f_flags) 1299 { 1300 struct snd_pcm_runtime *runtime = substream->runtime; 1301 if (runtime->status->state == SNDRV_PCM_STATE_OPEN || 1302 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED) 1303 return -EBADFD; 1304 if (snd_pcm_running(substream)) 1305 return -EBUSY; 1306 substream->f_flags = f_flags; 1307 return 0; 1308 } 1309 1310 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state) 1311 { 1312 int err; 1313 err = substream->ops->prepare(substream); 1314 if (err < 0) 1315 return err; 1316 return snd_pcm_do_reset(substream, 0); 1317 } 1318 1319 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state) 1320 { 1321 struct snd_pcm_runtime *runtime = substream->runtime; 1322 runtime->control->appl_ptr = runtime->status->hw_ptr; 1323 runtime->status->state = SNDRV_PCM_STATE_PREPARED; 1324 } 1325 1326 static struct action_ops snd_pcm_action_prepare = { 1327 .pre_action = snd_pcm_pre_prepare, 1328 .do_action = snd_pcm_do_prepare, 1329 .post_action = snd_pcm_post_prepare 1330 }; 1331 1332 /** 1333 * snd_pcm_prepare - prepare the PCM substream to be triggerable 1334 * @substream: the PCM substream instance 1335 * @file: file to refer f_flags 1336 */ 1337 static int snd_pcm_prepare(struct snd_pcm_substream *substream, 1338 struct file *file) 1339 { 1340 int res; 1341 struct snd_card *card = substream->pcm->card; 1342 int f_flags; 1343 1344 if (file) 1345 f_flags = file->f_flags; 1346 else 1347 f_flags = substream->f_flags; 1348 1349 snd_power_lock(card); 1350 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) 1351 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare, 1352 substream, f_flags); 1353 snd_power_unlock(card); 1354 return res; 1355 } 1356 1357 /* 1358 * drain ioctl 1359 */ 1360 1361 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state) 1362 { 1363 substream->runtime->trigger_master = substream; 1364 return 0; 1365 } 1366 1367 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state) 1368 { 1369 struct snd_pcm_runtime *runtime = substream->runtime; 1370 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 1371 switch (runtime->status->state) { 1372 case SNDRV_PCM_STATE_PREPARED: 1373 /* start playback stream if possible */ 1374 if (! snd_pcm_playback_empty(substream)) { 1375 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING); 1376 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING); 1377 } 1378 break; 1379 case SNDRV_PCM_STATE_RUNNING: 1380 runtime->status->state = SNDRV_PCM_STATE_DRAINING; 1381 break; 1382 default: 1383 break; 1384 } 1385 } else { 1386 /* stop running stream */ 1387 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) { 1388 int new_state = snd_pcm_capture_avail(runtime) > 0 ? 1389 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP; 1390 snd_pcm_do_stop(substream, new_state); 1391 snd_pcm_post_stop(substream, new_state); 1392 } 1393 } 1394 return 0; 1395 } 1396 1397 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state) 1398 { 1399 } 1400 1401 static struct action_ops snd_pcm_action_drain_init = { 1402 .pre_action = snd_pcm_pre_drain_init, 1403 .do_action = snd_pcm_do_drain_init, 1404 .post_action = snd_pcm_post_drain_init 1405 }; 1406 1407 static int snd_pcm_drop(struct snd_pcm_substream *substream); 1408 1409 /* 1410 * Drain the stream(s). 1411 * When the substream is linked, sync until the draining of all playback streams 1412 * is finished. 1413 * After this call, all streams are supposed to be either SETUP or DRAINING 1414 * (capture only) state. 1415 */ 1416 static int snd_pcm_drain(struct snd_pcm_substream *substream, 1417 struct file *file) 1418 { 1419 struct snd_card *card; 1420 struct snd_pcm_runtime *runtime; 1421 struct snd_pcm_substream *s; 1422 wait_queue_t wait; 1423 int result = 0; 1424 int nonblock = 0; 1425 1426 card = substream->pcm->card; 1427 runtime = substream->runtime; 1428 1429 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 1430 return -EBADFD; 1431 1432 snd_power_lock(card); 1433 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1434 result = snd_power_wait(card, SNDRV_CTL_POWER_D0); 1435 if (result < 0) { 1436 snd_power_unlock(card); 1437 return result; 1438 } 1439 } 1440 1441 if (file) { 1442 if (file->f_flags & O_NONBLOCK) 1443 nonblock = 1; 1444 } else if (substream->f_flags & O_NONBLOCK) 1445 nonblock = 1; 1446 1447 down_read(&snd_pcm_link_rwsem); 1448 snd_pcm_stream_lock_irq(substream); 1449 /* resume pause */ 1450 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) 1451 snd_pcm_pause(substream, 0); 1452 1453 /* pre-start/stop - all running streams are changed to DRAINING state */ 1454 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0); 1455 if (result < 0) 1456 goto unlock; 1457 /* in non-blocking, we don't wait in ioctl but let caller poll */ 1458 if (nonblock) { 1459 result = -EAGAIN; 1460 goto unlock; 1461 } 1462 1463 for (;;) { 1464 long tout; 1465 struct snd_pcm_runtime *to_check; 1466 if (signal_pending(current)) { 1467 result = -ERESTARTSYS; 1468 break; 1469 } 1470 /* find a substream to drain */ 1471 to_check = NULL; 1472 snd_pcm_group_for_each_entry(s, substream) { 1473 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK) 1474 continue; 1475 runtime = s->runtime; 1476 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 1477 to_check = runtime; 1478 break; 1479 } 1480 } 1481 if (!to_check) 1482 break; /* all drained */ 1483 init_waitqueue_entry(&wait, current); 1484 add_wait_queue(&to_check->sleep, &wait); 1485 snd_pcm_stream_unlock_irq(substream); 1486 up_read(&snd_pcm_link_rwsem); 1487 snd_power_unlock(card); 1488 if (runtime->no_period_wakeup) 1489 tout = MAX_SCHEDULE_TIMEOUT; 1490 else { 1491 tout = 10; 1492 if (runtime->rate) { 1493 long t = runtime->period_size * 2 / runtime->rate; 1494 tout = max(t, tout); 1495 } 1496 tout = msecs_to_jiffies(tout * 1000); 1497 } 1498 tout = schedule_timeout_interruptible(tout); 1499 snd_power_lock(card); 1500 down_read(&snd_pcm_link_rwsem); 1501 snd_pcm_stream_lock_irq(substream); 1502 remove_wait_queue(&to_check->sleep, &wait); 1503 if (tout == 0) { 1504 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1505 result = -ESTRPIPE; 1506 else { 1507 snd_printd("playback drain error (DMA or IRQ trouble?)\n"); 1508 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1509 result = -EIO; 1510 } 1511 break; 1512 } 1513 } 1514 1515 unlock: 1516 snd_pcm_stream_unlock_irq(substream); 1517 up_read(&snd_pcm_link_rwsem); 1518 snd_power_unlock(card); 1519 1520 return result; 1521 } 1522 1523 /* 1524 * drop ioctl 1525 * 1526 * Immediately put all linked substreams into SETUP state. 1527 */ 1528 static int snd_pcm_drop(struct snd_pcm_substream *substream) 1529 { 1530 struct snd_pcm_runtime *runtime; 1531 int result = 0; 1532 1533 if (PCM_RUNTIME_CHECK(substream)) 1534 return -ENXIO; 1535 runtime = substream->runtime; 1536 1537 if (runtime->status->state == SNDRV_PCM_STATE_OPEN || 1538 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED || 1539 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1540 return -EBADFD; 1541 1542 snd_pcm_stream_lock_irq(substream); 1543 /* resume pause */ 1544 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) 1545 snd_pcm_pause(substream, 0); 1546 1547 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1548 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */ 1549 snd_pcm_stream_unlock_irq(substream); 1550 1551 return result; 1552 } 1553 1554 1555 /* WARNING: Don't forget to fput back the file */ 1556 static struct file *snd_pcm_file_fd(int fd) 1557 { 1558 struct file *file; 1559 struct inode *inode; 1560 unsigned int minor; 1561 1562 file = fget(fd); 1563 if (!file) 1564 return NULL; 1565 inode = file->f_path.dentry->d_inode; 1566 if (!S_ISCHR(inode->i_mode) || 1567 imajor(inode) != snd_major) { 1568 fput(file); 1569 return NULL; 1570 } 1571 minor = iminor(inode); 1572 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) && 1573 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) { 1574 fput(file); 1575 return NULL; 1576 } 1577 return file; 1578 } 1579 1580 /* 1581 * PCM link handling 1582 */ 1583 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd) 1584 { 1585 int res = 0; 1586 struct file *file; 1587 struct snd_pcm_file *pcm_file; 1588 struct snd_pcm_substream *substream1; 1589 struct snd_pcm_group *group; 1590 1591 file = snd_pcm_file_fd(fd); 1592 if (!file) 1593 return -EBADFD; 1594 pcm_file = file->private_data; 1595 substream1 = pcm_file->substream; 1596 group = kmalloc(sizeof(*group), GFP_KERNEL); 1597 if (!group) { 1598 res = -ENOMEM; 1599 goto _nolock; 1600 } 1601 down_write(&snd_pcm_link_rwsem); 1602 write_lock_irq(&snd_pcm_link_rwlock); 1603 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN || 1604 substream->runtime->status->state != substream1->runtime->status->state) { 1605 res = -EBADFD; 1606 goto _end; 1607 } 1608 if (snd_pcm_stream_linked(substream1)) { 1609 res = -EALREADY; 1610 goto _end; 1611 } 1612 if (!snd_pcm_stream_linked(substream)) { 1613 substream->group = group; 1614 spin_lock_init(&substream->group->lock); 1615 INIT_LIST_HEAD(&substream->group->substreams); 1616 list_add_tail(&substream->link_list, &substream->group->substreams); 1617 substream->group->count = 1; 1618 } 1619 list_add_tail(&substream1->link_list, &substream->group->substreams); 1620 substream->group->count++; 1621 substream1->group = substream->group; 1622 _end: 1623 write_unlock_irq(&snd_pcm_link_rwlock); 1624 up_write(&snd_pcm_link_rwsem); 1625 _nolock: 1626 fput(file); 1627 if (res < 0) 1628 kfree(group); 1629 return res; 1630 } 1631 1632 static void relink_to_local(struct snd_pcm_substream *substream) 1633 { 1634 substream->group = &substream->self_group; 1635 INIT_LIST_HEAD(&substream->self_group.substreams); 1636 list_add_tail(&substream->link_list, &substream->self_group.substreams); 1637 } 1638 1639 static int snd_pcm_unlink(struct snd_pcm_substream *substream) 1640 { 1641 struct snd_pcm_substream *s; 1642 int res = 0; 1643 1644 down_write(&snd_pcm_link_rwsem); 1645 write_lock_irq(&snd_pcm_link_rwlock); 1646 if (!snd_pcm_stream_linked(substream)) { 1647 res = -EALREADY; 1648 goto _end; 1649 } 1650 list_del(&substream->link_list); 1651 substream->group->count--; 1652 if (substream->group->count == 1) { /* detach the last stream, too */ 1653 snd_pcm_group_for_each_entry(s, substream) { 1654 relink_to_local(s); 1655 break; 1656 } 1657 kfree(substream->group); 1658 } 1659 relink_to_local(substream); 1660 _end: 1661 write_unlock_irq(&snd_pcm_link_rwlock); 1662 up_write(&snd_pcm_link_rwsem); 1663 return res; 1664 } 1665 1666 /* 1667 * hw configurator 1668 */ 1669 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params, 1670 struct snd_pcm_hw_rule *rule) 1671 { 1672 struct snd_interval t; 1673 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]), 1674 hw_param_interval_c(params, rule->deps[1]), &t); 1675 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1676 } 1677 1678 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params, 1679 struct snd_pcm_hw_rule *rule) 1680 { 1681 struct snd_interval t; 1682 snd_interval_div(hw_param_interval_c(params, rule->deps[0]), 1683 hw_param_interval_c(params, rule->deps[1]), &t); 1684 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1685 } 1686 1687 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params, 1688 struct snd_pcm_hw_rule *rule) 1689 { 1690 struct snd_interval t; 1691 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]), 1692 hw_param_interval_c(params, rule->deps[1]), 1693 (unsigned long) rule->private, &t); 1694 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1695 } 1696 1697 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params, 1698 struct snd_pcm_hw_rule *rule) 1699 { 1700 struct snd_interval t; 1701 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]), 1702 (unsigned long) rule->private, 1703 hw_param_interval_c(params, rule->deps[1]), &t); 1704 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1705 } 1706 1707 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params, 1708 struct snd_pcm_hw_rule *rule) 1709 { 1710 unsigned int k; 1711 struct snd_interval *i = hw_param_interval(params, rule->deps[0]); 1712 struct snd_mask m; 1713 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 1714 snd_mask_any(&m); 1715 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { 1716 int bits; 1717 if (! snd_mask_test(mask, k)) 1718 continue; 1719 bits = snd_pcm_format_physical_width(k); 1720 if (bits <= 0) 1721 continue; /* ignore invalid formats */ 1722 if ((unsigned)bits < i->min || (unsigned)bits > i->max) 1723 snd_mask_reset(&m, k); 1724 } 1725 return snd_mask_refine(mask, &m); 1726 } 1727 1728 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params, 1729 struct snd_pcm_hw_rule *rule) 1730 { 1731 struct snd_interval t; 1732 unsigned int k; 1733 t.min = UINT_MAX; 1734 t.max = 0; 1735 t.openmin = 0; 1736 t.openmax = 0; 1737 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { 1738 int bits; 1739 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k)) 1740 continue; 1741 bits = snd_pcm_format_physical_width(k); 1742 if (bits <= 0) 1743 continue; /* ignore invalid formats */ 1744 if (t.min > (unsigned)bits) 1745 t.min = bits; 1746 if (t.max < (unsigned)bits) 1747 t.max = bits; 1748 } 1749 t.integer = 1; 1750 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1751 } 1752 1753 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12 1754 #error "Change this table" 1755 #endif 1756 1757 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100, 1758 48000, 64000, 88200, 96000, 176400, 192000 }; 1759 1760 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = { 1761 .count = ARRAY_SIZE(rates), 1762 .list = rates, 1763 }; 1764 1765 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params, 1766 struct snd_pcm_hw_rule *rule) 1767 { 1768 struct snd_pcm_hardware *hw = rule->private; 1769 return snd_interval_list(hw_param_interval(params, rule->var), 1770 snd_pcm_known_rates.count, 1771 snd_pcm_known_rates.list, hw->rates); 1772 } 1773 1774 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params, 1775 struct snd_pcm_hw_rule *rule) 1776 { 1777 struct snd_interval t; 1778 struct snd_pcm_substream *substream = rule->private; 1779 t.min = 0; 1780 t.max = substream->buffer_bytes_max; 1781 t.openmin = 0; 1782 t.openmax = 0; 1783 t.integer = 1; 1784 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1785 } 1786 1787 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream) 1788 { 1789 struct snd_pcm_runtime *runtime = substream->runtime; 1790 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; 1791 int k, err; 1792 1793 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { 1794 snd_mask_any(constrs_mask(constrs, k)); 1795 } 1796 1797 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { 1798 snd_interval_any(constrs_interval(constrs, k)); 1799 } 1800 1801 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS)); 1802 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)); 1803 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)); 1804 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)); 1805 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS)); 1806 1807 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, 1808 snd_pcm_hw_rule_format, NULL, 1809 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1810 if (err < 0) 1811 return err; 1812 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 1813 snd_pcm_hw_rule_sample_bits, NULL, 1814 SNDRV_PCM_HW_PARAM_FORMAT, 1815 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1816 if (err < 0) 1817 return err; 1818 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 1819 snd_pcm_hw_rule_div, NULL, 1820 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); 1821 if (err < 0) 1822 return err; 1823 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1824 snd_pcm_hw_rule_mul, NULL, 1825 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); 1826 if (err < 0) 1827 return err; 1828 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1829 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1830 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 1831 if (err < 0) 1832 return err; 1833 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1834 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1835 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1); 1836 if (err < 0) 1837 return err; 1838 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 1839 snd_pcm_hw_rule_div, NULL, 1840 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1841 if (err < 0) 1842 return err; 1843 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1844 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1845 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1); 1846 if (err < 0) 1847 return err; 1848 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1849 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1850 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1); 1851 if (err < 0) 1852 return err; 1853 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, 1854 snd_pcm_hw_rule_div, NULL, 1855 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 1856 if (err < 0) 1857 return err; 1858 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1859 snd_pcm_hw_rule_div, NULL, 1860 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); 1861 if (err < 0) 1862 return err; 1863 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1864 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1865 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1866 if (err < 0) 1867 return err; 1868 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1869 snd_pcm_hw_rule_muldivk, (void*) 1000000, 1870 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); 1871 if (err < 0) 1872 return err; 1873 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1874 snd_pcm_hw_rule_mul, NULL, 1875 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); 1876 if (err < 0) 1877 return err; 1878 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1879 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1880 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1881 if (err < 0) 1882 return err; 1883 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1884 snd_pcm_hw_rule_muldivk, (void*) 1000000, 1885 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); 1886 if (err < 0) 1887 return err; 1888 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 1889 snd_pcm_hw_rule_muldivk, (void*) 8, 1890 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1891 if (err < 0) 1892 return err; 1893 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1894 snd_pcm_hw_rule_muldivk, (void*) 8, 1895 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1896 if (err < 0) 1897 return err; 1898 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 1899 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1900 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); 1901 if (err < 0) 1902 return err; 1903 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME, 1904 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1905 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); 1906 if (err < 0) 1907 return err; 1908 return 0; 1909 } 1910 1911 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream) 1912 { 1913 struct snd_pcm_runtime *runtime = substream->runtime; 1914 struct snd_pcm_hardware *hw = &runtime->hw; 1915 int err; 1916 unsigned int mask = 0; 1917 1918 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) 1919 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED; 1920 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) 1921 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED; 1922 if (hw->info & SNDRV_PCM_INFO_MMAP) { 1923 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) 1924 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; 1925 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) 1926 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED; 1927 if (hw->info & SNDRV_PCM_INFO_COMPLEX) 1928 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX; 1929 } 1930 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask); 1931 if (err < 0) 1932 return err; 1933 1934 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats); 1935 if (err < 0) 1936 return err; 1937 1938 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD); 1939 if (err < 0) 1940 return err; 1941 1942 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, 1943 hw->channels_min, hw->channels_max); 1944 if (err < 0) 1945 return err; 1946 1947 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE, 1948 hw->rate_min, hw->rate_max); 1949 if (err < 0) 1950 return err; 1951 1952 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 1953 hw->period_bytes_min, hw->period_bytes_max); 1954 if (err < 0) 1955 return err; 1956 1957 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS, 1958 hw->periods_min, hw->periods_max); 1959 if (err < 0) 1960 return err; 1961 1962 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1963 hw->period_bytes_min, hw->buffer_bytes_max); 1964 if (err < 0) 1965 return err; 1966 1967 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1968 snd_pcm_hw_rule_buffer_bytes_max, substream, 1969 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1); 1970 if (err < 0) 1971 return err; 1972 1973 /* FIXME: remove */ 1974 if (runtime->dma_bytes) { 1975 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes); 1976 if (err < 0) 1977 return -EINVAL; 1978 } 1979 1980 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) { 1981 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1982 snd_pcm_hw_rule_rate, hw, 1983 SNDRV_PCM_HW_PARAM_RATE, -1); 1984 if (err < 0) 1985 return err; 1986 } 1987 1988 /* FIXME: this belong to lowlevel */ 1989 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE); 1990 1991 return 0; 1992 } 1993 1994 static void pcm_release_private(struct snd_pcm_substream *substream) 1995 { 1996 snd_pcm_unlink(substream); 1997 } 1998 1999 void snd_pcm_release_substream(struct snd_pcm_substream *substream) 2000 { 2001 substream->ref_count--; 2002 if (substream->ref_count > 0) 2003 return; 2004 2005 snd_pcm_drop(substream); 2006 if (substream->hw_opened) { 2007 if (substream->ops->hw_free != NULL) 2008 substream->ops->hw_free(substream); 2009 substream->ops->close(substream); 2010 substream->hw_opened = 0; 2011 } 2012 if (pm_qos_request_active(&substream->latency_pm_qos_req)) 2013 pm_qos_remove_request(&substream->latency_pm_qos_req); 2014 if (substream->pcm_release) { 2015 substream->pcm_release(substream); 2016 substream->pcm_release = NULL; 2017 } 2018 snd_pcm_detach_substream(substream); 2019 } 2020 2021 EXPORT_SYMBOL(snd_pcm_release_substream); 2022 2023 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, 2024 struct file *file, 2025 struct snd_pcm_substream **rsubstream) 2026 { 2027 struct snd_pcm_substream *substream; 2028 int err; 2029 2030 err = snd_pcm_attach_substream(pcm, stream, file, &substream); 2031 if (err < 0) 2032 return err; 2033 if (substream->ref_count > 1) { 2034 *rsubstream = substream; 2035 return 0; 2036 } 2037 2038 err = snd_pcm_hw_constraints_init(substream); 2039 if (err < 0) { 2040 snd_printd("snd_pcm_hw_constraints_init failed\n"); 2041 goto error; 2042 } 2043 2044 if ((err = substream->ops->open(substream)) < 0) 2045 goto error; 2046 2047 substream->hw_opened = 1; 2048 2049 err = snd_pcm_hw_constraints_complete(substream); 2050 if (err < 0) { 2051 snd_printd("snd_pcm_hw_constraints_complete failed\n"); 2052 goto error; 2053 } 2054 2055 *rsubstream = substream; 2056 return 0; 2057 2058 error: 2059 snd_pcm_release_substream(substream); 2060 return err; 2061 } 2062 2063 EXPORT_SYMBOL(snd_pcm_open_substream); 2064 2065 static int snd_pcm_open_file(struct file *file, 2066 struct snd_pcm *pcm, 2067 int stream) 2068 { 2069 struct snd_pcm_file *pcm_file; 2070 struct snd_pcm_substream *substream; 2071 int err; 2072 2073 err = snd_pcm_open_substream(pcm, stream, file, &substream); 2074 if (err < 0) 2075 return err; 2076 2077 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL); 2078 if (pcm_file == NULL) { 2079 snd_pcm_release_substream(substream); 2080 return -ENOMEM; 2081 } 2082 pcm_file->substream = substream; 2083 if (substream->ref_count == 1) { 2084 substream->file = pcm_file; 2085 substream->pcm_release = pcm_release_private; 2086 } 2087 file->private_data = pcm_file; 2088 2089 return 0; 2090 } 2091 2092 static int snd_pcm_playback_open(struct inode *inode, struct file *file) 2093 { 2094 struct snd_pcm *pcm; 2095 int err = nonseekable_open(inode, file); 2096 if (err < 0) 2097 return err; 2098 pcm = snd_lookup_minor_data(iminor(inode), 2099 SNDRV_DEVICE_TYPE_PCM_PLAYBACK); 2100 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK); 2101 } 2102 2103 static int snd_pcm_capture_open(struct inode *inode, struct file *file) 2104 { 2105 struct snd_pcm *pcm; 2106 int err = nonseekable_open(inode, file); 2107 if (err < 0) 2108 return err; 2109 pcm = snd_lookup_minor_data(iminor(inode), 2110 SNDRV_DEVICE_TYPE_PCM_CAPTURE); 2111 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE); 2112 } 2113 2114 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream) 2115 { 2116 int err; 2117 wait_queue_t wait; 2118 2119 if (pcm == NULL) { 2120 err = -ENODEV; 2121 goto __error1; 2122 } 2123 err = snd_card_file_add(pcm->card, file); 2124 if (err < 0) 2125 goto __error1; 2126 if (!try_module_get(pcm->card->module)) { 2127 err = -EFAULT; 2128 goto __error2; 2129 } 2130 init_waitqueue_entry(&wait, current); 2131 add_wait_queue(&pcm->open_wait, &wait); 2132 mutex_lock(&pcm->open_mutex); 2133 while (1) { 2134 err = snd_pcm_open_file(file, pcm, stream); 2135 if (err >= 0) 2136 break; 2137 if (err == -EAGAIN) { 2138 if (file->f_flags & O_NONBLOCK) { 2139 err = -EBUSY; 2140 break; 2141 } 2142 } else 2143 break; 2144 set_current_state(TASK_INTERRUPTIBLE); 2145 mutex_unlock(&pcm->open_mutex); 2146 schedule(); 2147 mutex_lock(&pcm->open_mutex); 2148 if (signal_pending(current)) { 2149 err = -ERESTARTSYS; 2150 break; 2151 } 2152 } 2153 remove_wait_queue(&pcm->open_wait, &wait); 2154 mutex_unlock(&pcm->open_mutex); 2155 if (err < 0) 2156 goto __error; 2157 return err; 2158 2159 __error: 2160 module_put(pcm->card->module); 2161 __error2: 2162 snd_card_file_remove(pcm->card, file); 2163 __error1: 2164 return err; 2165 } 2166 2167 static int snd_pcm_release(struct inode *inode, struct file *file) 2168 { 2169 struct snd_pcm *pcm; 2170 struct snd_pcm_substream *substream; 2171 struct snd_pcm_file *pcm_file; 2172 2173 pcm_file = file->private_data; 2174 substream = pcm_file->substream; 2175 if (snd_BUG_ON(!substream)) 2176 return -ENXIO; 2177 pcm = substream->pcm; 2178 mutex_lock(&pcm->open_mutex); 2179 snd_pcm_release_substream(substream); 2180 kfree(pcm_file); 2181 mutex_unlock(&pcm->open_mutex); 2182 wake_up(&pcm->open_wait); 2183 module_put(pcm->card->module); 2184 snd_card_file_remove(pcm->card, file); 2185 return 0; 2186 } 2187 2188 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream, 2189 snd_pcm_uframes_t frames) 2190 { 2191 struct snd_pcm_runtime *runtime = substream->runtime; 2192 snd_pcm_sframes_t appl_ptr; 2193 snd_pcm_sframes_t ret; 2194 snd_pcm_sframes_t hw_avail; 2195 2196 if (frames == 0) 2197 return 0; 2198 2199 snd_pcm_stream_lock_irq(substream); 2200 switch (runtime->status->state) { 2201 case SNDRV_PCM_STATE_PREPARED: 2202 break; 2203 case SNDRV_PCM_STATE_DRAINING: 2204 case SNDRV_PCM_STATE_RUNNING: 2205 if (snd_pcm_update_hw_ptr(substream) >= 0) 2206 break; 2207 /* Fall through */ 2208 case SNDRV_PCM_STATE_XRUN: 2209 ret = -EPIPE; 2210 goto __end; 2211 case SNDRV_PCM_STATE_SUSPENDED: 2212 ret = -ESTRPIPE; 2213 goto __end; 2214 default: 2215 ret = -EBADFD; 2216 goto __end; 2217 } 2218 2219 hw_avail = snd_pcm_playback_hw_avail(runtime); 2220 if (hw_avail <= 0) { 2221 ret = 0; 2222 goto __end; 2223 } 2224 if (frames > (snd_pcm_uframes_t)hw_avail) 2225 frames = hw_avail; 2226 appl_ptr = runtime->control->appl_ptr - frames; 2227 if (appl_ptr < 0) 2228 appl_ptr += runtime->boundary; 2229 runtime->control->appl_ptr = appl_ptr; 2230 ret = frames; 2231 __end: 2232 snd_pcm_stream_unlock_irq(substream); 2233 return ret; 2234 } 2235 2236 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream, 2237 snd_pcm_uframes_t frames) 2238 { 2239 struct snd_pcm_runtime *runtime = substream->runtime; 2240 snd_pcm_sframes_t appl_ptr; 2241 snd_pcm_sframes_t ret; 2242 snd_pcm_sframes_t hw_avail; 2243 2244 if (frames == 0) 2245 return 0; 2246 2247 snd_pcm_stream_lock_irq(substream); 2248 switch (runtime->status->state) { 2249 case SNDRV_PCM_STATE_PREPARED: 2250 case SNDRV_PCM_STATE_DRAINING: 2251 break; 2252 case SNDRV_PCM_STATE_RUNNING: 2253 if (snd_pcm_update_hw_ptr(substream) >= 0) 2254 break; 2255 /* Fall through */ 2256 case SNDRV_PCM_STATE_XRUN: 2257 ret = -EPIPE; 2258 goto __end; 2259 case SNDRV_PCM_STATE_SUSPENDED: 2260 ret = -ESTRPIPE; 2261 goto __end; 2262 default: 2263 ret = -EBADFD; 2264 goto __end; 2265 } 2266 2267 hw_avail = snd_pcm_capture_hw_avail(runtime); 2268 if (hw_avail <= 0) { 2269 ret = 0; 2270 goto __end; 2271 } 2272 if (frames > (snd_pcm_uframes_t)hw_avail) 2273 frames = hw_avail; 2274 appl_ptr = runtime->control->appl_ptr - frames; 2275 if (appl_ptr < 0) 2276 appl_ptr += runtime->boundary; 2277 runtime->control->appl_ptr = appl_ptr; 2278 ret = frames; 2279 __end: 2280 snd_pcm_stream_unlock_irq(substream); 2281 return ret; 2282 } 2283 2284 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream, 2285 snd_pcm_uframes_t frames) 2286 { 2287 struct snd_pcm_runtime *runtime = substream->runtime; 2288 snd_pcm_sframes_t appl_ptr; 2289 snd_pcm_sframes_t ret; 2290 snd_pcm_sframes_t avail; 2291 2292 if (frames == 0) 2293 return 0; 2294 2295 snd_pcm_stream_lock_irq(substream); 2296 switch (runtime->status->state) { 2297 case SNDRV_PCM_STATE_PREPARED: 2298 case SNDRV_PCM_STATE_PAUSED: 2299 break; 2300 case SNDRV_PCM_STATE_DRAINING: 2301 case SNDRV_PCM_STATE_RUNNING: 2302 if (snd_pcm_update_hw_ptr(substream) >= 0) 2303 break; 2304 /* Fall through */ 2305 case SNDRV_PCM_STATE_XRUN: 2306 ret = -EPIPE; 2307 goto __end; 2308 case SNDRV_PCM_STATE_SUSPENDED: 2309 ret = -ESTRPIPE; 2310 goto __end; 2311 default: 2312 ret = -EBADFD; 2313 goto __end; 2314 } 2315 2316 avail = snd_pcm_playback_avail(runtime); 2317 if (avail <= 0) { 2318 ret = 0; 2319 goto __end; 2320 } 2321 if (frames > (snd_pcm_uframes_t)avail) 2322 frames = avail; 2323 appl_ptr = runtime->control->appl_ptr + frames; 2324 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) 2325 appl_ptr -= runtime->boundary; 2326 runtime->control->appl_ptr = appl_ptr; 2327 ret = frames; 2328 __end: 2329 snd_pcm_stream_unlock_irq(substream); 2330 return ret; 2331 } 2332 2333 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream, 2334 snd_pcm_uframes_t frames) 2335 { 2336 struct snd_pcm_runtime *runtime = substream->runtime; 2337 snd_pcm_sframes_t appl_ptr; 2338 snd_pcm_sframes_t ret; 2339 snd_pcm_sframes_t avail; 2340 2341 if (frames == 0) 2342 return 0; 2343 2344 snd_pcm_stream_lock_irq(substream); 2345 switch (runtime->status->state) { 2346 case SNDRV_PCM_STATE_PREPARED: 2347 case SNDRV_PCM_STATE_DRAINING: 2348 case SNDRV_PCM_STATE_PAUSED: 2349 break; 2350 case SNDRV_PCM_STATE_RUNNING: 2351 if (snd_pcm_update_hw_ptr(substream) >= 0) 2352 break; 2353 /* Fall through */ 2354 case SNDRV_PCM_STATE_XRUN: 2355 ret = -EPIPE; 2356 goto __end; 2357 case SNDRV_PCM_STATE_SUSPENDED: 2358 ret = -ESTRPIPE; 2359 goto __end; 2360 default: 2361 ret = -EBADFD; 2362 goto __end; 2363 } 2364 2365 avail = snd_pcm_capture_avail(runtime); 2366 if (avail <= 0) { 2367 ret = 0; 2368 goto __end; 2369 } 2370 if (frames > (snd_pcm_uframes_t)avail) 2371 frames = avail; 2372 appl_ptr = runtime->control->appl_ptr + frames; 2373 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) 2374 appl_ptr -= runtime->boundary; 2375 runtime->control->appl_ptr = appl_ptr; 2376 ret = frames; 2377 __end: 2378 snd_pcm_stream_unlock_irq(substream); 2379 return ret; 2380 } 2381 2382 static int snd_pcm_hwsync(struct snd_pcm_substream *substream) 2383 { 2384 struct snd_pcm_runtime *runtime = substream->runtime; 2385 int err; 2386 2387 snd_pcm_stream_lock_irq(substream); 2388 switch (runtime->status->state) { 2389 case SNDRV_PCM_STATE_DRAINING: 2390 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 2391 goto __badfd; 2392 case SNDRV_PCM_STATE_RUNNING: 2393 if ((err = snd_pcm_update_hw_ptr(substream)) < 0) 2394 break; 2395 /* Fall through */ 2396 case SNDRV_PCM_STATE_PREPARED: 2397 case SNDRV_PCM_STATE_SUSPENDED: 2398 err = 0; 2399 break; 2400 case SNDRV_PCM_STATE_XRUN: 2401 err = -EPIPE; 2402 break; 2403 default: 2404 __badfd: 2405 err = -EBADFD; 2406 break; 2407 } 2408 snd_pcm_stream_unlock_irq(substream); 2409 return err; 2410 } 2411 2412 static int snd_pcm_delay(struct snd_pcm_substream *substream, 2413 snd_pcm_sframes_t __user *res) 2414 { 2415 struct snd_pcm_runtime *runtime = substream->runtime; 2416 int err; 2417 snd_pcm_sframes_t n = 0; 2418 2419 snd_pcm_stream_lock_irq(substream); 2420 switch (runtime->status->state) { 2421 case SNDRV_PCM_STATE_DRAINING: 2422 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 2423 goto __badfd; 2424 case SNDRV_PCM_STATE_RUNNING: 2425 if ((err = snd_pcm_update_hw_ptr(substream)) < 0) 2426 break; 2427 /* Fall through */ 2428 case SNDRV_PCM_STATE_PREPARED: 2429 case SNDRV_PCM_STATE_SUSPENDED: 2430 err = 0; 2431 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2432 n = snd_pcm_playback_hw_avail(runtime); 2433 else 2434 n = snd_pcm_capture_avail(runtime); 2435 n += runtime->delay; 2436 break; 2437 case SNDRV_PCM_STATE_XRUN: 2438 err = -EPIPE; 2439 break; 2440 default: 2441 __badfd: 2442 err = -EBADFD; 2443 break; 2444 } 2445 snd_pcm_stream_unlock_irq(substream); 2446 if (!err) 2447 if (put_user(n, res)) 2448 err = -EFAULT; 2449 return err; 2450 } 2451 2452 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream, 2453 struct snd_pcm_sync_ptr __user *_sync_ptr) 2454 { 2455 struct snd_pcm_runtime *runtime = substream->runtime; 2456 struct snd_pcm_sync_ptr sync_ptr; 2457 volatile struct snd_pcm_mmap_status *status; 2458 volatile struct snd_pcm_mmap_control *control; 2459 int err; 2460 2461 memset(&sync_ptr, 0, sizeof(sync_ptr)); 2462 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags))) 2463 return -EFAULT; 2464 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control))) 2465 return -EFAULT; 2466 status = runtime->status; 2467 control = runtime->control; 2468 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) { 2469 err = snd_pcm_hwsync(substream); 2470 if (err < 0) 2471 return err; 2472 } 2473 snd_pcm_stream_lock_irq(substream); 2474 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) 2475 control->appl_ptr = sync_ptr.c.control.appl_ptr; 2476 else 2477 sync_ptr.c.control.appl_ptr = control->appl_ptr; 2478 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) 2479 control->avail_min = sync_ptr.c.control.avail_min; 2480 else 2481 sync_ptr.c.control.avail_min = control->avail_min; 2482 sync_ptr.s.status.state = status->state; 2483 sync_ptr.s.status.hw_ptr = status->hw_ptr; 2484 sync_ptr.s.status.tstamp = status->tstamp; 2485 sync_ptr.s.status.suspended_state = status->suspended_state; 2486 snd_pcm_stream_unlock_irq(substream); 2487 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr))) 2488 return -EFAULT; 2489 return 0; 2490 } 2491 2492 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg) 2493 { 2494 struct snd_pcm_runtime *runtime = substream->runtime; 2495 int arg; 2496 2497 if (get_user(arg, _arg)) 2498 return -EFAULT; 2499 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST) 2500 return -EINVAL; 2501 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY; 2502 if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC) 2503 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC; 2504 return 0; 2505 } 2506 2507 static int snd_pcm_common_ioctl1(struct file *file, 2508 struct snd_pcm_substream *substream, 2509 unsigned int cmd, void __user *arg) 2510 { 2511 switch (cmd) { 2512 case SNDRV_PCM_IOCTL_PVERSION: 2513 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0; 2514 case SNDRV_PCM_IOCTL_INFO: 2515 return snd_pcm_info_user(substream, arg); 2516 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */ 2517 return 0; 2518 case SNDRV_PCM_IOCTL_TTSTAMP: 2519 return snd_pcm_tstamp(substream, arg); 2520 case SNDRV_PCM_IOCTL_HW_REFINE: 2521 return snd_pcm_hw_refine_user(substream, arg); 2522 case SNDRV_PCM_IOCTL_HW_PARAMS: 2523 return snd_pcm_hw_params_user(substream, arg); 2524 case SNDRV_PCM_IOCTL_HW_FREE: 2525 return snd_pcm_hw_free(substream); 2526 case SNDRV_PCM_IOCTL_SW_PARAMS: 2527 return snd_pcm_sw_params_user(substream, arg); 2528 case SNDRV_PCM_IOCTL_STATUS: 2529 return snd_pcm_status_user(substream, arg); 2530 case SNDRV_PCM_IOCTL_CHANNEL_INFO: 2531 return snd_pcm_channel_info_user(substream, arg); 2532 case SNDRV_PCM_IOCTL_PREPARE: 2533 return snd_pcm_prepare(substream, file); 2534 case SNDRV_PCM_IOCTL_RESET: 2535 return snd_pcm_reset(substream); 2536 case SNDRV_PCM_IOCTL_START: 2537 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING); 2538 case SNDRV_PCM_IOCTL_LINK: 2539 return snd_pcm_link(substream, (int)(unsigned long) arg); 2540 case SNDRV_PCM_IOCTL_UNLINK: 2541 return snd_pcm_unlink(substream); 2542 case SNDRV_PCM_IOCTL_RESUME: 2543 return snd_pcm_resume(substream); 2544 case SNDRV_PCM_IOCTL_XRUN: 2545 return snd_pcm_xrun(substream); 2546 case SNDRV_PCM_IOCTL_HWSYNC: 2547 return snd_pcm_hwsync(substream); 2548 case SNDRV_PCM_IOCTL_DELAY: 2549 return snd_pcm_delay(substream, arg); 2550 case SNDRV_PCM_IOCTL_SYNC_PTR: 2551 return snd_pcm_sync_ptr(substream, arg); 2552 #ifdef CONFIG_SND_SUPPORT_OLD_API 2553 case SNDRV_PCM_IOCTL_HW_REFINE_OLD: 2554 return snd_pcm_hw_refine_old_user(substream, arg); 2555 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD: 2556 return snd_pcm_hw_params_old_user(substream, arg); 2557 #endif 2558 case SNDRV_PCM_IOCTL_DRAIN: 2559 return snd_pcm_drain(substream, file); 2560 case SNDRV_PCM_IOCTL_DROP: 2561 return snd_pcm_drop(substream); 2562 case SNDRV_PCM_IOCTL_PAUSE: 2563 { 2564 int res; 2565 snd_pcm_stream_lock_irq(substream); 2566 res = snd_pcm_pause(substream, (int)(unsigned long)arg); 2567 snd_pcm_stream_unlock_irq(substream); 2568 return res; 2569 } 2570 } 2571 snd_printd("unknown ioctl = 0x%x\n", cmd); 2572 return -ENOTTY; 2573 } 2574 2575 static int snd_pcm_playback_ioctl1(struct file *file, 2576 struct snd_pcm_substream *substream, 2577 unsigned int cmd, void __user *arg) 2578 { 2579 if (snd_BUG_ON(!substream)) 2580 return -ENXIO; 2581 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) 2582 return -EINVAL; 2583 switch (cmd) { 2584 case SNDRV_PCM_IOCTL_WRITEI_FRAMES: 2585 { 2586 struct snd_xferi xferi; 2587 struct snd_xferi __user *_xferi = arg; 2588 struct snd_pcm_runtime *runtime = substream->runtime; 2589 snd_pcm_sframes_t result; 2590 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2591 return -EBADFD; 2592 if (put_user(0, &_xferi->result)) 2593 return -EFAULT; 2594 if (copy_from_user(&xferi, _xferi, sizeof(xferi))) 2595 return -EFAULT; 2596 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames); 2597 __put_user(result, &_xferi->result); 2598 return result < 0 ? result : 0; 2599 } 2600 case SNDRV_PCM_IOCTL_WRITEN_FRAMES: 2601 { 2602 struct snd_xfern xfern; 2603 struct snd_xfern __user *_xfern = arg; 2604 struct snd_pcm_runtime *runtime = substream->runtime; 2605 void __user **bufs; 2606 snd_pcm_sframes_t result; 2607 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2608 return -EBADFD; 2609 if (runtime->channels > 128) 2610 return -EINVAL; 2611 if (put_user(0, &_xfern->result)) 2612 return -EFAULT; 2613 if (copy_from_user(&xfern, _xfern, sizeof(xfern))) 2614 return -EFAULT; 2615 2616 bufs = memdup_user(xfern.bufs, 2617 sizeof(void *) * runtime->channels); 2618 if (IS_ERR(bufs)) 2619 return PTR_ERR(bufs); 2620 result = snd_pcm_lib_writev(substream, bufs, xfern.frames); 2621 kfree(bufs); 2622 __put_user(result, &_xfern->result); 2623 return result < 0 ? result : 0; 2624 } 2625 case SNDRV_PCM_IOCTL_REWIND: 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_rewind(substream, frames); 2635 __put_user(result, _frames); 2636 return result < 0 ? result : 0; 2637 } 2638 case SNDRV_PCM_IOCTL_FORWARD: 2639 { 2640 snd_pcm_uframes_t frames; 2641 snd_pcm_uframes_t __user *_frames = arg; 2642 snd_pcm_sframes_t result; 2643 if (get_user(frames, _frames)) 2644 return -EFAULT; 2645 if (put_user(0, _frames)) 2646 return -EFAULT; 2647 result = snd_pcm_playback_forward(substream, frames); 2648 __put_user(result, _frames); 2649 return result < 0 ? result : 0; 2650 } 2651 } 2652 return snd_pcm_common_ioctl1(file, substream, cmd, arg); 2653 } 2654 2655 static int snd_pcm_capture_ioctl1(struct file *file, 2656 struct snd_pcm_substream *substream, 2657 unsigned int cmd, void __user *arg) 2658 { 2659 if (snd_BUG_ON(!substream)) 2660 return -ENXIO; 2661 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE)) 2662 return -EINVAL; 2663 switch (cmd) { 2664 case SNDRV_PCM_IOCTL_READI_FRAMES: 2665 { 2666 struct snd_xferi xferi; 2667 struct snd_xferi __user *_xferi = arg; 2668 struct snd_pcm_runtime *runtime = substream->runtime; 2669 snd_pcm_sframes_t result; 2670 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2671 return -EBADFD; 2672 if (put_user(0, &_xferi->result)) 2673 return -EFAULT; 2674 if (copy_from_user(&xferi, _xferi, sizeof(xferi))) 2675 return -EFAULT; 2676 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames); 2677 __put_user(result, &_xferi->result); 2678 return result < 0 ? result : 0; 2679 } 2680 case SNDRV_PCM_IOCTL_READN_FRAMES: 2681 { 2682 struct snd_xfern xfern; 2683 struct snd_xfern __user *_xfern = arg; 2684 struct snd_pcm_runtime *runtime = substream->runtime; 2685 void *bufs; 2686 snd_pcm_sframes_t result; 2687 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2688 return -EBADFD; 2689 if (runtime->channels > 128) 2690 return -EINVAL; 2691 if (put_user(0, &_xfern->result)) 2692 return -EFAULT; 2693 if (copy_from_user(&xfern, _xfern, sizeof(xfern))) 2694 return -EFAULT; 2695 2696 bufs = memdup_user(xfern.bufs, 2697 sizeof(void *) * runtime->channels); 2698 if (IS_ERR(bufs)) 2699 return PTR_ERR(bufs); 2700 result = snd_pcm_lib_readv(substream, bufs, xfern.frames); 2701 kfree(bufs); 2702 __put_user(result, &_xfern->result); 2703 return result < 0 ? result : 0; 2704 } 2705 case SNDRV_PCM_IOCTL_REWIND: 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_rewind(substream, frames); 2715 __put_user(result, _frames); 2716 return result < 0 ? result : 0; 2717 } 2718 case SNDRV_PCM_IOCTL_FORWARD: 2719 { 2720 snd_pcm_uframes_t frames; 2721 snd_pcm_uframes_t __user *_frames = arg; 2722 snd_pcm_sframes_t result; 2723 if (get_user(frames, _frames)) 2724 return -EFAULT; 2725 if (put_user(0, _frames)) 2726 return -EFAULT; 2727 result = snd_pcm_capture_forward(substream, frames); 2728 __put_user(result, _frames); 2729 return result < 0 ? result : 0; 2730 } 2731 } 2732 return snd_pcm_common_ioctl1(file, substream, cmd, arg); 2733 } 2734 2735 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd, 2736 unsigned long arg) 2737 { 2738 struct snd_pcm_file *pcm_file; 2739 2740 pcm_file = file->private_data; 2741 2742 if (((cmd >> 8) & 0xff) != 'A') 2743 return -ENOTTY; 2744 2745 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd, 2746 (void __user *)arg); 2747 } 2748 2749 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd, 2750 unsigned long arg) 2751 { 2752 struct snd_pcm_file *pcm_file; 2753 2754 pcm_file = file->private_data; 2755 2756 if (((cmd >> 8) & 0xff) != 'A') 2757 return -ENOTTY; 2758 2759 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd, 2760 (void __user *)arg); 2761 } 2762 2763 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, 2764 unsigned int cmd, void *arg) 2765 { 2766 mm_segment_t fs; 2767 int result; 2768 2769 fs = snd_enter_user(); 2770 switch (substream->stream) { 2771 case SNDRV_PCM_STREAM_PLAYBACK: 2772 result = snd_pcm_playback_ioctl1(NULL, substream, cmd, 2773 (void __user *)arg); 2774 break; 2775 case SNDRV_PCM_STREAM_CAPTURE: 2776 result = snd_pcm_capture_ioctl1(NULL, substream, cmd, 2777 (void __user *)arg); 2778 break; 2779 default: 2780 result = -EINVAL; 2781 break; 2782 } 2783 snd_leave_user(fs); 2784 return result; 2785 } 2786 2787 EXPORT_SYMBOL(snd_pcm_kernel_ioctl); 2788 2789 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count, 2790 loff_t * offset) 2791 { 2792 struct snd_pcm_file *pcm_file; 2793 struct snd_pcm_substream *substream; 2794 struct snd_pcm_runtime *runtime; 2795 snd_pcm_sframes_t result; 2796 2797 pcm_file = file->private_data; 2798 substream = pcm_file->substream; 2799 if (PCM_RUNTIME_CHECK(substream)) 2800 return -ENXIO; 2801 runtime = substream->runtime; 2802 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2803 return -EBADFD; 2804 if (!frame_aligned(runtime, count)) 2805 return -EINVAL; 2806 count = bytes_to_frames(runtime, count); 2807 result = snd_pcm_lib_read(substream, buf, count); 2808 if (result > 0) 2809 result = frames_to_bytes(runtime, result); 2810 return result; 2811 } 2812 2813 static ssize_t snd_pcm_write(struct file *file, const char __user *buf, 2814 size_t count, loff_t * offset) 2815 { 2816 struct snd_pcm_file *pcm_file; 2817 struct snd_pcm_substream *substream; 2818 struct snd_pcm_runtime *runtime; 2819 snd_pcm_sframes_t result; 2820 2821 pcm_file = file->private_data; 2822 substream = pcm_file->substream; 2823 if (PCM_RUNTIME_CHECK(substream)) 2824 return -ENXIO; 2825 runtime = substream->runtime; 2826 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2827 return -EBADFD; 2828 if (!frame_aligned(runtime, count)) 2829 return -EINVAL; 2830 count = bytes_to_frames(runtime, count); 2831 result = snd_pcm_lib_write(substream, buf, count); 2832 if (result > 0) 2833 result = frames_to_bytes(runtime, result); 2834 return result; 2835 } 2836 2837 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov, 2838 unsigned long nr_segs, loff_t pos) 2839 2840 { 2841 struct snd_pcm_file *pcm_file; 2842 struct snd_pcm_substream *substream; 2843 struct snd_pcm_runtime *runtime; 2844 snd_pcm_sframes_t result; 2845 unsigned long i; 2846 void __user **bufs; 2847 snd_pcm_uframes_t frames; 2848 2849 pcm_file = iocb->ki_filp->private_data; 2850 substream = pcm_file->substream; 2851 if (PCM_RUNTIME_CHECK(substream)) 2852 return -ENXIO; 2853 runtime = substream->runtime; 2854 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2855 return -EBADFD; 2856 if (nr_segs > 1024 || nr_segs != runtime->channels) 2857 return -EINVAL; 2858 if (!frame_aligned(runtime, iov->iov_len)) 2859 return -EINVAL; 2860 frames = bytes_to_samples(runtime, iov->iov_len); 2861 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL); 2862 if (bufs == NULL) 2863 return -ENOMEM; 2864 for (i = 0; i < nr_segs; ++i) 2865 bufs[i] = iov[i].iov_base; 2866 result = snd_pcm_lib_readv(substream, bufs, frames); 2867 if (result > 0) 2868 result = frames_to_bytes(runtime, result); 2869 kfree(bufs); 2870 return result; 2871 } 2872 2873 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov, 2874 unsigned long nr_segs, loff_t pos) 2875 { 2876 struct snd_pcm_file *pcm_file; 2877 struct snd_pcm_substream *substream; 2878 struct snd_pcm_runtime *runtime; 2879 snd_pcm_sframes_t result; 2880 unsigned long i; 2881 void __user **bufs; 2882 snd_pcm_uframes_t frames; 2883 2884 pcm_file = iocb->ki_filp->private_data; 2885 substream = pcm_file->substream; 2886 if (PCM_RUNTIME_CHECK(substream)) 2887 return -ENXIO; 2888 runtime = substream->runtime; 2889 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2890 return -EBADFD; 2891 if (nr_segs > 128 || nr_segs != runtime->channels || 2892 !frame_aligned(runtime, iov->iov_len)) 2893 return -EINVAL; 2894 frames = bytes_to_samples(runtime, iov->iov_len); 2895 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL); 2896 if (bufs == NULL) 2897 return -ENOMEM; 2898 for (i = 0; i < nr_segs; ++i) 2899 bufs[i] = iov[i].iov_base; 2900 result = snd_pcm_lib_writev(substream, bufs, frames); 2901 if (result > 0) 2902 result = frames_to_bytes(runtime, result); 2903 kfree(bufs); 2904 return result; 2905 } 2906 2907 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait) 2908 { 2909 struct snd_pcm_file *pcm_file; 2910 struct snd_pcm_substream *substream; 2911 struct snd_pcm_runtime *runtime; 2912 unsigned int mask; 2913 snd_pcm_uframes_t avail; 2914 2915 pcm_file = file->private_data; 2916 2917 substream = pcm_file->substream; 2918 if (PCM_RUNTIME_CHECK(substream)) 2919 return -ENXIO; 2920 runtime = substream->runtime; 2921 2922 poll_wait(file, &runtime->sleep, wait); 2923 2924 snd_pcm_stream_lock_irq(substream); 2925 avail = snd_pcm_playback_avail(runtime); 2926 switch (runtime->status->state) { 2927 case SNDRV_PCM_STATE_RUNNING: 2928 case SNDRV_PCM_STATE_PREPARED: 2929 case SNDRV_PCM_STATE_PAUSED: 2930 if (avail >= runtime->control->avail_min) { 2931 mask = POLLOUT | POLLWRNORM; 2932 break; 2933 } 2934 /* Fall through */ 2935 case SNDRV_PCM_STATE_DRAINING: 2936 mask = 0; 2937 break; 2938 default: 2939 mask = POLLOUT | POLLWRNORM | POLLERR; 2940 break; 2941 } 2942 snd_pcm_stream_unlock_irq(substream); 2943 return mask; 2944 } 2945 2946 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait) 2947 { 2948 struct snd_pcm_file *pcm_file; 2949 struct snd_pcm_substream *substream; 2950 struct snd_pcm_runtime *runtime; 2951 unsigned int mask; 2952 snd_pcm_uframes_t avail; 2953 2954 pcm_file = file->private_data; 2955 2956 substream = pcm_file->substream; 2957 if (PCM_RUNTIME_CHECK(substream)) 2958 return -ENXIO; 2959 runtime = substream->runtime; 2960 2961 poll_wait(file, &runtime->sleep, wait); 2962 2963 snd_pcm_stream_lock_irq(substream); 2964 avail = snd_pcm_capture_avail(runtime); 2965 switch (runtime->status->state) { 2966 case SNDRV_PCM_STATE_RUNNING: 2967 case SNDRV_PCM_STATE_PREPARED: 2968 case SNDRV_PCM_STATE_PAUSED: 2969 if (avail >= runtime->control->avail_min) { 2970 mask = POLLIN | POLLRDNORM; 2971 break; 2972 } 2973 mask = 0; 2974 break; 2975 case SNDRV_PCM_STATE_DRAINING: 2976 if (avail > 0) { 2977 mask = POLLIN | POLLRDNORM; 2978 break; 2979 } 2980 /* Fall through */ 2981 default: 2982 mask = POLLIN | POLLRDNORM | POLLERR; 2983 break; 2984 } 2985 snd_pcm_stream_unlock_irq(substream); 2986 return mask; 2987 } 2988 2989 /* 2990 * mmap support 2991 */ 2992 2993 /* 2994 * Only on coherent architectures, we can mmap the status and the control records 2995 * for effcient data transfer. On others, we have to use HWSYNC ioctl... 2996 */ 2997 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) 2998 /* 2999 * mmap status record 3000 */ 3001 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area, 3002 struct vm_fault *vmf) 3003 { 3004 struct snd_pcm_substream *substream = area->vm_private_data; 3005 struct snd_pcm_runtime *runtime; 3006 3007 if (substream == NULL) 3008 return VM_FAULT_SIGBUS; 3009 runtime = substream->runtime; 3010 vmf->page = virt_to_page(runtime->status); 3011 get_page(vmf->page); 3012 return 0; 3013 } 3014 3015 static const struct vm_operations_struct snd_pcm_vm_ops_status = 3016 { 3017 .fault = snd_pcm_mmap_status_fault, 3018 }; 3019 3020 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, 3021 struct vm_area_struct *area) 3022 { 3023 long size; 3024 if (!(area->vm_flags & VM_READ)) 3025 return -EINVAL; 3026 size = area->vm_end - area->vm_start; 3027 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))) 3028 return -EINVAL; 3029 area->vm_ops = &snd_pcm_vm_ops_status; 3030 area->vm_private_data = substream; 3031 area->vm_flags |= VM_RESERVED; 3032 return 0; 3033 } 3034 3035 /* 3036 * mmap control record 3037 */ 3038 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area, 3039 struct vm_fault *vmf) 3040 { 3041 struct snd_pcm_substream *substream = area->vm_private_data; 3042 struct snd_pcm_runtime *runtime; 3043 3044 if (substream == NULL) 3045 return VM_FAULT_SIGBUS; 3046 runtime = substream->runtime; 3047 vmf->page = virt_to_page(runtime->control); 3048 get_page(vmf->page); 3049 return 0; 3050 } 3051 3052 static const struct vm_operations_struct snd_pcm_vm_ops_control = 3053 { 3054 .fault = snd_pcm_mmap_control_fault, 3055 }; 3056 3057 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, 3058 struct vm_area_struct *area) 3059 { 3060 long size; 3061 if (!(area->vm_flags & VM_READ)) 3062 return -EINVAL; 3063 size = area->vm_end - area->vm_start; 3064 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))) 3065 return -EINVAL; 3066 area->vm_ops = &snd_pcm_vm_ops_control; 3067 area->vm_private_data = substream; 3068 area->vm_flags |= VM_RESERVED; 3069 return 0; 3070 } 3071 #else /* ! coherent mmap */ 3072 /* 3073 * don't support mmap for status and control records. 3074 */ 3075 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, 3076 struct vm_area_struct *area) 3077 { 3078 return -ENXIO; 3079 } 3080 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, 3081 struct vm_area_struct *area) 3082 { 3083 return -ENXIO; 3084 } 3085 #endif /* coherent mmap */ 3086 3087 static inline struct page * 3088 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs) 3089 { 3090 void *vaddr = substream->runtime->dma_area + ofs; 3091 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT) 3092 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) 3093 return virt_to_page(CAC_ADDR(vaddr)); 3094 #endif 3095 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE) 3096 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) { 3097 dma_addr_t addr = substream->runtime->dma_addr + ofs; 3098 addr -= get_dma_offset(substream->dma_buffer.dev.dev); 3099 /* assume dma_handle set via pfn_to_phys() in 3100 * mm/dma-noncoherent.c 3101 */ 3102 return pfn_to_page(addr >> PAGE_SHIFT); 3103 } 3104 #endif 3105 return virt_to_page(vaddr); 3106 } 3107 3108 /* 3109 * fault callback for mmapping a RAM page 3110 */ 3111 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area, 3112 struct vm_fault *vmf) 3113 { 3114 struct snd_pcm_substream *substream = area->vm_private_data; 3115 struct snd_pcm_runtime *runtime; 3116 unsigned long offset; 3117 struct page * page; 3118 size_t dma_bytes; 3119 3120 if (substream == NULL) 3121 return VM_FAULT_SIGBUS; 3122 runtime = substream->runtime; 3123 offset = vmf->pgoff << PAGE_SHIFT; 3124 dma_bytes = PAGE_ALIGN(runtime->dma_bytes); 3125 if (offset > dma_bytes - PAGE_SIZE) 3126 return VM_FAULT_SIGBUS; 3127 if (substream->ops->page) 3128 page = substream->ops->page(substream, offset); 3129 else 3130 page = snd_pcm_default_page_ops(substream, offset); 3131 if (!page) 3132 return VM_FAULT_SIGBUS; 3133 get_page(page); 3134 vmf->page = page; 3135 return 0; 3136 } 3137 3138 static const struct vm_operations_struct snd_pcm_vm_ops_data = { 3139 .open = snd_pcm_mmap_data_open, 3140 .close = snd_pcm_mmap_data_close, 3141 }; 3142 3143 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = { 3144 .open = snd_pcm_mmap_data_open, 3145 .close = snd_pcm_mmap_data_close, 3146 .fault = snd_pcm_mmap_data_fault, 3147 }; 3148 3149 #ifndef ARCH_HAS_DMA_MMAP_COHERENT 3150 /* This should be defined / handled globally! */ 3151 #ifdef CONFIG_ARM 3152 #define ARCH_HAS_DMA_MMAP_COHERENT 3153 #endif 3154 #endif 3155 3156 /* 3157 * mmap the DMA buffer on RAM 3158 */ 3159 int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream, 3160 struct vm_area_struct *area) 3161 { 3162 area->vm_flags |= VM_RESERVED; 3163 #ifdef ARCH_HAS_DMA_MMAP_COHERENT 3164 if (!substream->ops->page && 3165 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) 3166 return dma_mmap_coherent(substream->dma_buffer.dev.dev, 3167 area, 3168 substream->runtime->dma_area, 3169 substream->runtime->dma_addr, 3170 area->vm_end - area->vm_start); 3171 #elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT) 3172 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV && 3173 !plat_device_is_coherent(substream->dma_buffer.dev.dev)) 3174 area->vm_page_prot = pgprot_noncached(area->vm_page_prot); 3175 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */ 3176 /* mmap with fault handler */ 3177 area->vm_ops = &snd_pcm_vm_ops_data_fault; 3178 return 0; 3179 } 3180 EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap); 3181 3182 /* 3183 * mmap the DMA buffer on I/O memory area 3184 */ 3185 #if SNDRV_PCM_INFO_MMAP_IOMEM 3186 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, 3187 struct vm_area_struct *area) 3188 { 3189 long size; 3190 unsigned long offset; 3191 3192 area->vm_page_prot = pgprot_noncached(area->vm_page_prot); 3193 area->vm_flags |= VM_IO; 3194 size = area->vm_end - area->vm_start; 3195 offset = area->vm_pgoff << PAGE_SHIFT; 3196 if (io_remap_pfn_range(area, area->vm_start, 3197 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT, 3198 size, area->vm_page_prot)) 3199 return -EAGAIN; 3200 return 0; 3201 } 3202 3203 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem); 3204 #endif /* SNDRV_PCM_INFO_MMAP */ 3205 3206 /* 3207 * mmap DMA buffer 3208 */ 3209 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, 3210 struct vm_area_struct *area) 3211 { 3212 struct snd_pcm_runtime *runtime; 3213 long size; 3214 unsigned long offset; 3215 size_t dma_bytes; 3216 int err; 3217 3218 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 3219 if (!(area->vm_flags & (VM_WRITE|VM_READ))) 3220 return -EINVAL; 3221 } else { 3222 if (!(area->vm_flags & VM_READ)) 3223 return -EINVAL; 3224 } 3225 runtime = substream->runtime; 3226 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 3227 return -EBADFD; 3228 if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) 3229 return -ENXIO; 3230 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || 3231 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) 3232 return -EINVAL; 3233 size = area->vm_end - area->vm_start; 3234 offset = area->vm_pgoff << PAGE_SHIFT; 3235 dma_bytes = PAGE_ALIGN(runtime->dma_bytes); 3236 if ((size_t)size > dma_bytes) 3237 return -EINVAL; 3238 if (offset > dma_bytes - size) 3239 return -EINVAL; 3240 3241 area->vm_ops = &snd_pcm_vm_ops_data; 3242 area->vm_private_data = substream; 3243 if (substream->ops->mmap) 3244 err = substream->ops->mmap(substream, area); 3245 else 3246 err = snd_pcm_lib_default_mmap(substream, area); 3247 if (!err) 3248 atomic_inc(&substream->mmap_count); 3249 return err; 3250 } 3251 3252 EXPORT_SYMBOL(snd_pcm_mmap_data); 3253 3254 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area) 3255 { 3256 struct snd_pcm_file * pcm_file; 3257 struct snd_pcm_substream *substream; 3258 unsigned long offset; 3259 3260 pcm_file = file->private_data; 3261 substream = pcm_file->substream; 3262 if (PCM_RUNTIME_CHECK(substream)) 3263 return -ENXIO; 3264 3265 offset = area->vm_pgoff << PAGE_SHIFT; 3266 switch (offset) { 3267 case SNDRV_PCM_MMAP_OFFSET_STATUS: 3268 if (pcm_file->no_compat_mmap) 3269 return -ENXIO; 3270 return snd_pcm_mmap_status(substream, file, area); 3271 case SNDRV_PCM_MMAP_OFFSET_CONTROL: 3272 if (pcm_file->no_compat_mmap) 3273 return -ENXIO; 3274 return snd_pcm_mmap_control(substream, file, area); 3275 default: 3276 return snd_pcm_mmap_data(substream, file, area); 3277 } 3278 return 0; 3279 } 3280 3281 static int snd_pcm_fasync(int fd, struct file * file, int on) 3282 { 3283 struct snd_pcm_file * pcm_file; 3284 struct snd_pcm_substream *substream; 3285 struct snd_pcm_runtime *runtime; 3286 3287 pcm_file = file->private_data; 3288 substream = pcm_file->substream; 3289 if (PCM_RUNTIME_CHECK(substream)) 3290 return -ENXIO; 3291 runtime = substream->runtime; 3292 return fasync_helper(fd, file, on, &runtime->fasync); 3293 } 3294 3295 /* 3296 * ioctl32 compat 3297 */ 3298 #ifdef CONFIG_COMPAT 3299 #include "pcm_compat.c" 3300 #else 3301 #define snd_pcm_ioctl_compat NULL 3302 #endif 3303 3304 /* 3305 * To be removed helpers to keep binary compatibility 3306 */ 3307 3308 #ifdef CONFIG_SND_SUPPORT_OLD_API 3309 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5)) 3310 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5)) 3311 3312 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params, 3313 struct snd_pcm_hw_params_old *oparams) 3314 { 3315 unsigned int i; 3316 3317 memset(params, 0, sizeof(*params)); 3318 params->flags = oparams->flags; 3319 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) 3320 params->masks[i].bits[0] = oparams->masks[i]; 3321 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals)); 3322 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask); 3323 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask); 3324 params->info = oparams->info; 3325 params->msbits = oparams->msbits; 3326 params->rate_num = oparams->rate_num; 3327 params->rate_den = oparams->rate_den; 3328 params->fifo_size = oparams->fifo_size; 3329 } 3330 3331 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams, 3332 struct snd_pcm_hw_params *params) 3333 { 3334 unsigned int i; 3335 3336 memset(oparams, 0, sizeof(*oparams)); 3337 oparams->flags = params->flags; 3338 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) 3339 oparams->masks[i] = params->masks[i].bits[0]; 3340 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals)); 3341 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask); 3342 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask); 3343 oparams->info = params->info; 3344 oparams->msbits = params->msbits; 3345 oparams->rate_num = params->rate_num; 3346 oparams->rate_den = params->rate_den; 3347 oparams->fifo_size = params->fifo_size; 3348 } 3349 3350 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, 3351 struct snd_pcm_hw_params_old __user * _oparams) 3352 { 3353 struct snd_pcm_hw_params *params; 3354 struct snd_pcm_hw_params_old *oparams = NULL; 3355 int err; 3356 3357 params = kmalloc(sizeof(*params), GFP_KERNEL); 3358 if (!params) 3359 return -ENOMEM; 3360 3361 oparams = memdup_user(_oparams, sizeof(*oparams)); 3362 if (IS_ERR(oparams)) { 3363 err = PTR_ERR(oparams); 3364 goto out; 3365 } 3366 snd_pcm_hw_convert_from_old_params(params, oparams); 3367 err = snd_pcm_hw_refine(substream, params); 3368 snd_pcm_hw_convert_to_old_params(oparams, params); 3369 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { 3370 if (!err) 3371 err = -EFAULT; 3372 } 3373 3374 kfree(oparams); 3375 out: 3376 kfree(params); 3377 return err; 3378 } 3379 3380 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, 3381 struct snd_pcm_hw_params_old __user * _oparams) 3382 { 3383 struct snd_pcm_hw_params *params; 3384 struct snd_pcm_hw_params_old *oparams = NULL; 3385 int err; 3386 3387 params = kmalloc(sizeof(*params), GFP_KERNEL); 3388 if (!params) 3389 return -ENOMEM; 3390 3391 oparams = memdup_user(_oparams, sizeof(*oparams)); 3392 if (IS_ERR(oparams)) { 3393 err = PTR_ERR(oparams); 3394 goto out; 3395 } 3396 snd_pcm_hw_convert_from_old_params(params, oparams); 3397 err = snd_pcm_hw_params(substream, params); 3398 snd_pcm_hw_convert_to_old_params(oparams, params); 3399 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { 3400 if (!err) 3401 err = -EFAULT; 3402 } 3403 3404 kfree(oparams); 3405 out: 3406 kfree(params); 3407 return err; 3408 } 3409 #endif /* CONFIG_SND_SUPPORT_OLD_API */ 3410 3411 #ifndef CONFIG_MMU 3412 static unsigned long snd_pcm_get_unmapped_area(struct file *file, 3413 unsigned long addr, 3414 unsigned long len, 3415 unsigned long pgoff, 3416 unsigned long flags) 3417 { 3418 struct snd_pcm_file *pcm_file = file->private_data; 3419 struct snd_pcm_substream *substream = pcm_file->substream; 3420 struct snd_pcm_runtime *runtime = substream->runtime; 3421 unsigned long offset = pgoff << PAGE_SHIFT; 3422 3423 switch (offset) { 3424 case SNDRV_PCM_MMAP_OFFSET_STATUS: 3425 return (unsigned long)runtime->status; 3426 case SNDRV_PCM_MMAP_OFFSET_CONTROL: 3427 return (unsigned long)runtime->control; 3428 default: 3429 return (unsigned long)runtime->dma_area + offset; 3430 } 3431 } 3432 #else 3433 # define snd_pcm_get_unmapped_area NULL 3434 #endif 3435 3436 /* 3437 * Register section 3438 */ 3439 3440 const struct file_operations snd_pcm_f_ops[2] = { 3441 { 3442 .owner = THIS_MODULE, 3443 .write = snd_pcm_write, 3444 .aio_write = snd_pcm_aio_write, 3445 .open = snd_pcm_playback_open, 3446 .release = snd_pcm_release, 3447 .llseek = no_llseek, 3448 .poll = snd_pcm_playback_poll, 3449 .unlocked_ioctl = snd_pcm_playback_ioctl, 3450 .compat_ioctl = snd_pcm_ioctl_compat, 3451 .mmap = snd_pcm_mmap, 3452 .fasync = snd_pcm_fasync, 3453 .get_unmapped_area = snd_pcm_get_unmapped_area, 3454 }, 3455 { 3456 .owner = THIS_MODULE, 3457 .read = snd_pcm_read, 3458 .aio_read = snd_pcm_aio_read, 3459 .open = snd_pcm_capture_open, 3460 .release = snd_pcm_release, 3461 .llseek = no_llseek, 3462 .poll = snd_pcm_capture_poll, 3463 .unlocked_ioctl = snd_pcm_capture_ioctl, 3464 .compat_ioctl = snd_pcm_ioctl_compat, 3465 .mmap = snd_pcm_mmap, 3466 .fasync = snd_pcm_fasync, 3467 .get_unmapped_area = snd_pcm_get_unmapped_area, 3468 } 3469 }; 3470