1 /* 2 * Digital Audio (PCM) abstract layer 3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 4 * 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 * 20 */ 21 22 #include <linux/mm.h> 23 #include <linux/file.h> 24 #include <linux/slab.h> 25 #include <linux/time.h> 26 #include <linux/pm_qos_params.h> 27 #include <linux/uio.h> 28 #include <linux/dma-mapping.h> 29 #include <sound/core.h> 30 #include <sound/control.h> 31 #include <sound/info.h> 32 #include <sound/pcm.h> 33 #include <sound/pcm_params.h> 34 #include <sound/timer.h> 35 #include <sound/minors.h> 36 #include <asm/io.h> 37 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT) 38 #include <dma-coherence.h> 39 #endif 40 41 /* 42 * Compatibility 43 */ 44 45 struct snd_pcm_hw_params_old { 46 unsigned int flags; 47 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT - 48 SNDRV_PCM_HW_PARAM_ACCESS + 1]; 49 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME - 50 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1]; 51 unsigned int rmask; 52 unsigned int cmask; 53 unsigned int info; 54 unsigned int msbits; 55 unsigned int rate_num; 56 unsigned int rate_den; 57 snd_pcm_uframes_t fifo_size; 58 unsigned char reserved[64]; 59 }; 60 61 #ifdef CONFIG_SND_SUPPORT_OLD_API 62 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old) 63 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old) 64 65 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, 66 struct snd_pcm_hw_params_old __user * _oparams); 67 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, 68 struct snd_pcm_hw_params_old __user * _oparams); 69 #endif 70 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream); 71 72 /* 73 * 74 */ 75 76 DEFINE_RWLOCK(snd_pcm_link_rwlock); 77 EXPORT_SYMBOL(snd_pcm_link_rwlock); 78 79 static DECLARE_RWSEM(snd_pcm_link_rwsem); 80 81 static inline mm_segment_t snd_enter_user(void) 82 { 83 mm_segment_t fs = get_fs(); 84 set_fs(get_ds()); 85 return fs; 86 } 87 88 static inline void snd_leave_user(mm_segment_t fs) 89 { 90 set_fs(fs); 91 } 92 93 94 95 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info) 96 { 97 struct snd_pcm_runtime *runtime; 98 struct snd_pcm *pcm = substream->pcm; 99 struct snd_pcm_str *pstr = substream->pstr; 100 101 memset(info, 0, sizeof(*info)); 102 info->card = pcm->card->number; 103 info->device = pcm->device; 104 info->stream = substream->stream; 105 info->subdevice = substream->number; 106 strlcpy(info->id, pcm->id, sizeof(info->id)); 107 strlcpy(info->name, pcm->name, sizeof(info->name)); 108 info->dev_class = pcm->dev_class; 109 info->dev_subclass = pcm->dev_subclass; 110 info->subdevices_count = pstr->substream_count; 111 info->subdevices_avail = pstr->substream_count - pstr->substream_opened; 112 strlcpy(info->subname, substream->name, sizeof(info->subname)); 113 runtime = substream->runtime; 114 /* AB: FIXME!!! This is definitely nonsense */ 115 if (runtime) { 116 info->sync = runtime->sync; 117 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info); 118 } 119 return 0; 120 } 121 122 int snd_pcm_info_user(struct snd_pcm_substream *substream, 123 struct snd_pcm_info __user * _info) 124 { 125 struct snd_pcm_info *info; 126 int err; 127 128 info = kmalloc(sizeof(*info), GFP_KERNEL); 129 if (! info) 130 return -ENOMEM; 131 err = snd_pcm_info(substream, info); 132 if (err >= 0) { 133 if (copy_to_user(_info, info, sizeof(*info))) 134 err = -EFAULT; 135 } 136 kfree(info); 137 return err; 138 } 139 140 #undef RULES_DEBUG 141 142 #ifdef RULES_DEBUG 143 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v 144 static const char * const snd_pcm_hw_param_names[] = { 145 HW_PARAM(ACCESS), 146 HW_PARAM(FORMAT), 147 HW_PARAM(SUBFORMAT), 148 HW_PARAM(SAMPLE_BITS), 149 HW_PARAM(FRAME_BITS), 150 HW_PARAM(CHANNELS), 151 HW_PARAM(RATE), 152 HW_PARAM(PERIOD_TIME), 153 HW_PARAM(PERIOD_SIZE), 154 HW_PARAM(PERIOD_BYTES), 155 HW_PARAM(PERIODS), 156 HW_PARAM(BUFFER_TIME), 157 HW_PARAM(BUFFER_SIZE), 158 HW_PARAM(BUFFER_BYTES), 159 HW_PARAM(TICK_TIME), 160 }; 161 #endif 162 163 int snd_pcm_hw_refine(struct snd_pcm_substream *substream, 164 struct snd_pcm_hw_params *params) 165 { 166 unsigned int k; 167 struct snd_pcm_hardware *hw; 168 struct snd_interval *i = NULL; 169 struct snd_mask *m = NULL; 170 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints; 171 unsigned int rstamps[constrs->rules_num]; 172 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1]; 173 unsigned int stamp = 2; 174 int changed, again; 175 176 params->info = 0; 177 params->fifo_size = 0; 178 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS)) 179 params->msbits = 0; 180 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) { 181 params->rate_num = 0; 182 params->rate_den = 0; 183 } 184 185 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { 186 m = hw_param_mask(params, k); 187 if (snd_mask_empty(m)) 188 return -EINVAL; 189 if (!(params->rmask & (1 << k))) 190 continue; 191 #ifdef RULES_DEBUG 192 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]); 193 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); 194 #endif 195 changed = snd_mask_refine(m, constrs_mask(constrs, k)); 196 #ifdef RULES_DEBUG 197 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); 198 #endif 199 if (changed) 200 params->cmask |= 1 << k; 201 if (changed < 0) 202 return changed; 203 } 204 205 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { 206 i = hw_param_interval(params, k); 207 if (snd_interval_empty(i)) 208 return -EINVAL; 209 if (!(params->rmask & (1 << k))) 210 continue; 211 #ifdef RULES_DEBUG 212 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]); 213 if (i->empty) 214 printk("empty"); 215 else 216 printk("%c%u %u%c", 217 i->openmin ? '(' : '[', i->min, 218 i->max, i->openmax ? ')' : ']'); 219 printk(" -> "); 220 #endif 221 changed = snd_interval_refine(i, constrs_interval(constrs, k)); 222 #ifdef RULES_DEBUG 223 if (i->empty) 224 printk("empty\n"); 225 else 226 printk("%c%u %u%c\n", 227 i->openmin ? '(' : '[', i->min, 228 i->max, i->openmax ? ')' : ']'); 229 #endif 230 if (changed) 231 params->cmask |= 1 << k; 232 if (changed < 0) 233 return changed; 234 } 235 236 for (k = 0; k < constrs->rules_num; k++) 237 rstamps[k] = 0; 238 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) 239 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0; 240 do { 241 again = 0; 242 for (k = 0; k < constrs->rules_num; k++) { 243 struct snd_pcm_hw_rule *r = &constrs->rules[k]; 244 unsigned int d; 245 int doit = 0; 246 if (r->cond && !(r->cond & params->flags)) 247 continue; 248 for (d = 0; r->deps[d] >= 0; d++) { 249 if (vstamps[r->deps[d]] > rstamps[k]) { 250 doit = 1; 251 break; 252 } 253 } 254 if (!doit) 255 continue; 256 #ifdef RULES_DEBUG 257 printk(KERN_DEBUG "Rule %d [%p]: ", k, r->func); 258 if (r->var >= 0) { 259 printk("%s = ", snd_pcm_hw_param_names[r->var]); 260 if (hw_is_mask(r->var)) { 261 m = hw_param_mask(params, r->var); 262 printk("%x", *m->bits); 263 } else { 264 i = hw_param_interval(params, r->var); 265 if (i->empty) 266 printk("empty"); 267 else 268 printk("%c%u %u%c", 269 i->openmin ? '(' : '[', i->min, 270 i->max, i->openmax ? ')' : ']'); 271 } 272 } 273 #endif 274 changed = r->func(params, r); 275 #ifdef RULES_DEBUG 276 if (r->var >= 0) { 277 printk(" -> "); 278 if (hw_is_mask(r->var)) 279 printk("%x", *m->bits); 280 else { 281 if (i->empty) 282 printk("empty"); 283 else 284 printk("%c%u %u%c", 285 i->openmin ? '(' : '[', i->min, 286 i->max, i->openmax ? ')' : ']'); 287 } 288 } 289 printk("\n"); 290 #endif 291 rstamps[k] = stamp; 292 if (changed && r->var >= 0) { 293 params->cmask |= (1 << r->var); 294 vstamps[r->var] = stamp; 295 again = 1; 296 } 297 if (changed < 0) 298 return changed; 299 stamp++; 300 } 301 } while (again); 302 if (!params->msbits) { 303 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); 304 if (snd_interval_single(i)) 305 params->msbits = snd_interval_value(i); 306 } 307 308 if (!params->rate_den) { 309 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); 310 if (snd_interval_single(i)) { 311 params->rate_num = snd_interval_value(i); 312 params->rate_den = 1; 313 } 314 } 315 316 hw = &substream->runtime->hw; 317 if (!params->info) 318 params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES; 319 if (!params->fifo_size) { 320 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 321 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 322 if (snd_mask_min(m) == snd_mask_max(m) && 323 snd_interval_min(i) == snd_interval_max(i)) { 324 changed = substream->ops->ioctl(substream, 325 SNDRV_PCM_IOCTL1_FIFO_SIZE, params); 326 if (changed < 0) 327 return changed; 328 } 329 } 330 params->rmask = 0; 331 return 0; 332 } 333 334 EXPORT_SYMBOL(snd_pcm_hw_refine); 335 336 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream, 337 struct snd_pcm_hw_params __user * _params) 338 { 339 struct snd_pcm_hw_params *params; 340 int err; 341 342 params = memdup_user(_params, sizeof(*params)); 343 if (IS_ERR(params)) 344 return PTR_ERR(params); 345 346 err = snd_pcm_hw_refine(substream, params); 347 if (copy_to_user(_params, params, sizeof(*params))) { 348 if (!err) 349 err = -EFAULT; 350 } 351 352 kfree(params); 353 return err; 354 } 355 356 static int period_to_usecs(struct snd_pcm_runtime *runtime) 357 { 358 int usecs; 359 360 if (! runtime->rate) 361 return -1; /* invalid */ 362 363 /* take 75% of period time as the deadline */ 364 usecs = (750000 / runtime->rate) * runtime->period_size; 365 usecs += ((750000 % runtime->rate) * runtime->period_size) / 366 runtime->rate; 367 368 return usecs; 369 } 370 371 static int snd_pcm_hw_params(struct snd_pcm_substream *substream, 372 struct snd_pcm_hw_params *params) 373 { 374 struct snd_pcm_runtime *runtime; 375 int err, usecs; 376 unsigned int bits; 377 snd_pcm_uframes_t frames; 378 379 if (PCM_RUNTIME_CHECK(substream)) 380 return -ENXIO; 381 runtime = substream->runtime; 382 snd_pcm_stream_lock_irq(substream); 383 switch (runtime->status->state) { 384 case SNDRV_PCM_STATE_OPEN: 385 case SNDRV_PCM_STATE_SETUP: 386 case SNDRV_PCM_STATE_PREPARED: 387 break; 388 default: 389 snd_pcm_stream_unlock_irq(substream); 390 return -EBADFD; 391 } 392 snd_pcm_stream_unlock_irq(substream); 393 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 394 if (!substream->oss.oss) 395 #endif 396 if (atomic_read(&substream->mmap_count)) 397 return -EBADFD; 398 399 params->rmask = ~0U; 400 err = snd_pcm_hw_refine(substream, params); 401 if (err < 0) 402 goto _error; 403 404 err = snd_pcm_hw_params_choose(substream, params); 405 if (err < 0) 406 goto _error; 407 408 if (substream->ops->hw_params != NULL) { 409 err = substream->ops->hw_params(substream, params); 410 if (err < 0) 411 goto _error; 412 } 413 414 runtime->access = params_access(params); 415 runtime->format = params_format(params); 416 runtime->subformat = params_subformat(params); 417 runtime->channels = params_channels(params); 418 runtime->rate = params_rate(params); 419 runtime->period_size = params_period_size(params); 420 runtime->periods = params_periods(params); 421 runtime->buffer_size = params_buffer_size(params); 422 runtime->info = params->info; 423 runtime->rate_num = params->rate_num; 424 runtime->rate_den = params->rate_den; 425 runtime->no_period_wakeup = 426 (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) && 427 (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP); 428 429 bits = snd_pcm_format_physical_width(runtime->format); 430 runtime->sample_bits = bits; 431 bits *= runtime->channels; 432 runtime->frame_bits = bits; 433 frames = 1; 434 while (bits % 8 != 0) { 435 bits *= 2; 436 frames *= 2; 437 } 438 runtime->byte_align = bits / 8; 439 runtime->min_align = frames; 440 441 /* Default sw params */ 442 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; 443 runtime->period_step = 1; 444 runtime->control->avail_min = runtime->period_size; 445 runtime->start_threshold = 1; 446 runtime->stop_threshold = runtime->buffer_size; 447 runtime->silence_threshold = 0; 448 runtime->silence_size = 0; 449 runtime->boundary = runtime->buffer_size; 450 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size) 451 runtime->boundary *= 2; 452 453 snd_pcm_timer_resolution_change(substream); 454 runtime->status->state = SNDRV_PCM_STATE_SETUP; 455 456 if (pm_qos_request_active(&substream->latency_pm_qos_req)) 457 pm_qos_remove_request(&substream->latency_pm_qos_req); 458 if ((usecs = period_to_usecs(runtime)) >= 0) 459 pm_qos_add_request(&substream->latency_pm_qos_req, 460 PM_QOS_CPU_DMA_LATENCY, usecs); 461 return 0; 462 _error: 463 /* hardware might be unusable from this time, 464 so we force application to retry to set 465 the correct hardware parameter settings */ 466 runtime->status->state = SNDRV_PCM_STATE_OPEN; 467 if (substream->ops->hw_free != NULL) 468 substream->ops->hw_free(substream); 469 return err; 470 } 471 472 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream, 473 struct snd_pcm_hw_params __user * _params) 474 { 475 struct snd_pcm_hw_params *params; 476 int err; 477 478 params = memdup_user(_params, sizeof(*params)); 479 if (IS_ERR(params)) 480 return PTR_ERR(params); 481 482 err = snd_pcm_hw_params(substream, params); 483 if (copy_to_user(_params, params, sizeof(*params))) { 484 if (!err) 485 err = -EFAULT; 486 } 487 488 kfree(params); 489 return err; 490 } 491 492 static int snd_pcm_hw_free(struct snd_pcm_substream *substream) 493 { 494 struct snd_pcm_runtime *runtime; 495 int result = 0; 496 497 if (PCM_RUNTIME_CHECK(substream)) 498 return -ENXIO; 499 runtime = substream->runtime; 500 snd_pcm_stream_lock_irq(substream); 501 switch (runtime->status->state) { 502 case SNDRV_PCM_STATE_SETUP: 503 case SNDRV_PCM_STATE_PREPARED: 504 break; 505 default: 506 snd_pcm_stream_unlock_irq(substream); 507 return -EBADFD; 508 } 509 snd_pcm_stream_unlock_irq(substream); 510 if (atomic_read(&substream->mmap_count)) 511 return -EBADFD; 512 if (substream->ops->hw_free) 513 result = substream->ops->hw_free(substream); 514 runtime->status->state = SNDRV_PCM_STATE_OPEN; 515 pm_qos_remove_request(&substream->latency_pm_qos_req); 516 return result; 517 } 518 519 static int snd_pcm_sw_params(struct snd_pcm_substream *substream, 520 struct snd_pcm_sw_params *params) 521 { 522 struct snd_pcm_runtime *runtime; 523 int err; 524 525 if (PCM_RUNTIME_CHECK(substream)) 526 return -ENXIO; 527 runtime = substream->runtime; 528 snd_pcm_stream_lock_irq(substream); 529 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 530 snd_pcm_stream_unlock_irq(substream); 531 return -EBADFD; 532 } 533 snd_pcm_stream_unlock_irq(substream); 534 535 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST) 536 return -EINVAL; 537 if (params->avail_min == 0) 538 return -EINVAL; 539 if (params->silence_size >= runtime->boundary) { 540 if (params->silence_threshold != 0) 541 return -EINVAL; 542 } else { 543 if (params->silence_size > params->silence_threshold) 544 return -EINVAL; 545 if (params->silence_threshold > runtime->buffer_size) 546 return -EINVAL; 547 } 548 err = 0; 549 snd_pcm_stream_lock_irq(substream); 550 runtime->tstamp_mode = params->tstamp_mode; 551 runtime->period_step = params->period_step; 552 runtime->control->avail_min = params->avail_min; 553 runtime->start_threshold = params->start_threshold; 554 runtime->stop_threshold = params->stop_threshold; 555 runtime->silence_threshold = params->silence_threshold; 556 runtime->silence_size = params->silence_size; 557 params->boundary = runtime->boundary; 558 if (snd_pcm_running(substream)) { 559 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 560 runtime->silence_size > 0) 561 snd_pcm_playback_silence(substream, ULONG_MAX); 562 err = snd_pcm_update_state(substream, runtime); 563 } 564 snd_pcm_stream_unlock_irq(substream); 565 return err; 566 } 567 568 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream, 569 struct snd_pcm_sw_params __user * _params) 570 { 571 struct snd_pcm_sw_params params; 572 int err; 573 if (copy_from_user(¶ms, _params, sizeof(params))) 574 return -EFAULT; 575 err = snd_pcm_sw_params(substream, ¶ms); 576 if (copy_to_user(_params, ¶ms, sizeof(params))) 577 return -EFAULT; 578 return err; 579 } 580 581 int snd_pcm_status(struct snd_pcm_substream *substream, 582 struct snd_pcm_status *status) 583 { 584 struct snd_pcm_runtime *runtime = substream->runtime; 585 586 snd_pcm_stream_lock_irq(substream); 587 status->state = runtime->status->state; 588 status->suspended_state = runtime->status->suspended_state; 589 if (status->state == SNDRV_PCM_STATE_OPEN) 590 goto _end; 591 status->trigger_tstamp = runtime->trigger_tstamp; 592 if (snd_pcm_running(substream)) { 593 snd_pcm_update_hw_ptr(substream); 594 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { 595 status->tstamp = runtime->status->tstamp; 596 goto _tstamp_end; 597 } 598 } 599 snd_pcm_gettime(runtime, &status->tstamp); 600 _tstamp_end: 601 status->appl_ptr = runtime->control->appl_ptr; 602 status->hw_ptr = runtime->status->hw_ptr; 603 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 604 status->avail = snd_pcm_playback_avail(runtime); 605 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING || 606 runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 607 status->delay = runtime->buffer_size - status->avail; 608 status->delay += runtime->delay; 609 } else 610 status->delay = 0; 611 } else { 612 status->avail = snd_pcm_capture_avail(runtime); 613 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) 614 status->delay = status->avail + runtime->delay; 615 else 616 status->delay = 0; 617 } 618 status->avail_max = runtime->avail_max; 619 status->overrange = runtime->overrange; 620 runtime->avail_max = 0; 621 runtime->overrange = 0; 622 _end: 623 snd_pcm_stream_unlock_irq(substream); 624 return 0; 625 } 626 627 static int snd_pcm_status_user(struct snd_pcm_substream *substream, 628 struct snd_pcm_status __user * _status) 629 { 630 struct snd_pcm_status status; 631 int res; 632 633 memset(&status, 0, sizeof(status)); 634 res = snd_pcm_status(substream, &status); 635 if (res < 0) 636 return res; 637 if (copy_to_user(_status, &status, sizeof(status))) 638 return -EFAULT; 639 return 0; 640 } 641 642 static int snd_pcm_channel_info(struct snd_pcm_substream *substream, 643 struct snd_pcm_channel_info * info) 644 { 645 struct snd_pcm_runtime *runtime; 646 unsigned int channel; 647 648 channel = info->channel; 649 runtime = substream->runtime; 650 snd_pcm_stream_lock_irq(substream); 651 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 652 snd_pcm_stream_unlock_irq(substream); 653 return -EBADFD; 654 } 655 snd_pcm_stream_unlock_irq(substream); 656 if (channel >= runtime->channels) 657 return -EINVAL; 658 memset(info, 0, sizeof(*info)); 659 info->channel = channel; 660 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info); 661 } 662 663 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream, 664 struct snd_pcm_channel_info __user * _info) 665 { 666 struct snd_pcm_channel_info info; 667 int res; 668 669 if (copy_from_user(&info, _info, sizeof(info))) 670 return -EFAULT; 671 res = snd_pcm_channel_info(substream, &info); 672 if (res < 0) 673 return res; 674 if (copy_to_user(_info, &info, sizeof(info))) 675 return -EFAULT; 676 return 0; 677 } 678 679 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream) 680 { 681 struct snd_pcm_runtime *runtime = substream->runtime; 682 if (runtime->trigger_master == NULL) 683 return; 684 if (runtime->trigger_master == substream) { 685 snd_pcm_gettime(runtime, &runtime->trigger_tstamp); 686 } else { 687 snd_pcm_trigger_tstamp(runtime->trigger_master); 688 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp; 689 } 690 runtime->trigger_master = NULL; 691 } 692 693 struct action_ops { 694 int (*pre_action)(struct snd_pcm_substream *substream, int state); 695 int (*do_action)(struct snd_pcm_substream *substream, int state); 696 void (*undo_action)(struct snd_pcm_substream *substream, int state); 697 void (*post_action)(struct snd_pcm_substream *substream, int state); 698 }; 699 700 /* 701 * this functions is core for handling of linked stream 702 * Note: the stream state might be changed also on failure 703 * Note2: call with calling stream lock + link lock 704 */ 705 static int snd_pcm_action_group(struct action_ops *ops, 706 struct snd_pcm_substream *substream, 707 int state, int do_lock) 708 { 709 struct snd_pcm_substream *s = NULL; 710 struct snd_pcm_substream *s1; 711 int res = 0; 712 713 snd_pcm_group_for_each_entry(s, substream) { 714 if (do_lock && s != substream) 715 spin_lock_nested(&s->self_group.lock, 716 SINGLE_DEPTH_NESTING); 717 res = ops->pre_action(s, state); 718 if (res < 0) 719 goto _unlock; 720 } 721 snd_pcm_group_for_each_entry(s, substream) { 722 res = ops->do_action(s, state); 723 if (res < 0) { 724 if (ops->undo_action) { 725 snd_pcm_group_for_each_entry(s1, substream) { 726 if (s1 == s) /* failed stream */ 727 break; 728 ops->undo_action(s1, state); 729 } 730 } 731 s = NULL; /* unlock all */ 732 goto _unlock; 733 } 734 } 735 snd_pcm_group_for_each_entry(s, substream) { 736 ops->post_action(s, state); 737 } 738 _unlock: 739 if (do_lock) { 740 /* unlock streams */ 741 snd_pcm_group_for_each_entry(s1, substream) { 742 if (s1 != substream) 743 spin_unlock(&s1->self_group.lock); 744 if (s1 == s) /* end */ 745 break; 746 } 747 } 748 return res; 749 } 750 751 /* 752 * Note: call with stream lock 753 */ 754 static int snd_pcm_action_single(struct action_ops *ops, 755 struct snd_pcm_substream *substream, 756 int state) 757 { 758 int res; 759 760 res = ops->pre_action(substream, state); 761 if (res < 0) 762 return res; 763 res = ops->do_action(substream, state); 764 if (res == 0) 765 ops->post_action(substream, state); 766 else if (ops->undo_action) 767 ops->undo_action(substream, state); 768 return res; 769 } 770 771 /* 772 * Note: call with stream lock 773 */ 774 static int snd_pcm_action(struct action_ops *ops, 775 struct snd_pcm_substream *substream, 776 int state) 777 { 778 int res; 779 780 if (snd_pcm_stream_linked(substream)) { 781 if (!spin_trylock(&substream->group->lock)) { 782 spin_unlock(&substream->self_group.lock); 783 spin_lock(&substream->group->lock); 784 spin_lock(&substream->self_group.lock); 785 } 786 res = snd_pcm_action_group(ops, substream, state, 1); 787 spin_unlock(&substream->group->lock); 788 } else { 789 res = snd_pcm_action_single(ops, substream, state); 790 } 791 return res; 792 } 793 794 /* 795 * Note: don't use any locks before 796 */ 797 static int snd_pcm_action_lock_irq(struct action_ops *ops, 798 struct snd_pcm_substream *substream, 799 int state) 800 { 801 int res; 802 803 read_lock_irq(&snd_pcm_link_rwlock); 804 if (snd_pcm_stream_linked(substream)) { 805 spin_lock(&substream->group->lock); 806 spin_lock(&substream->self_group.lock); 807 res = snd_pcm_action_group(ops, substream, state, 1); 808 spin_unlock(&substream->self_group.lock); 809 spin_unlock(&substream->group->lock); 810 } else { 811 spin_lock(&substream->self_group.lock); 812 res = snd_pcm_action_single(ops, substream, state); 813 spin_unlock(&substream->self_group.lock); 814 } 815 read_unlock_irq(&snd_pcm_link_rwlock); 816 return res; 817 } 818 819 /* 820 */ 821 static int snd_pcm_action_nonatomic(struct action_ops *ops, 822 struct snd_pcm_substream *substream, 823 int state) 824 { 825 int res; 826 827 down_read(&snd_pcm_link_rwsem); 828 if (snd_pcm_stream_linked(substream)) 829 res = snd_pcm_action_group(ops, substream, state, 0); 830 else 831 res = snd_pcm_action_single(ops, substream, state); 832 up_read(&snd_pcm_link_rwsem); 833 return res; 834 } 835 836 /* 837 * start callbacks 838 */ 839 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state) 840 { 841 struct snd_pcm_runtime *runtime = substream->runtime; 842 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED) 843 return -EBADFD; 844 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 845 !snd_pcm_playback_data(substream)) 846 return -EPIPE; 847 runtime->trigger_master = substream; 848 return 0; 849 } 850 851 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state) 852 { 853 if (substream->runtime->trigger_master != substream) 854 return 0; 855 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START); 856 } 857 858 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state) 859 { 860 if (substream->runtime->trigger_master == substream) 861 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); 862 } 863 864 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state) 865 { 866 struct snd_pcm_runtime *runtime = substream->runtime; 867 snd_pcm_trigger_tstamp(substream); 868 runtime->hw_ptr_jiffies = jiffies; 869 runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) / 870 runtime->rate; 871 runtime->status->state = state; 872 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 873 runtime->silence_size > 0) 874 snd_pcm_playback_silence(substream, ULONG_MAX); 875 if (substream->timer) 876 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART, 877 &runtime->trigger_tstamp); 878 } 879 880 static struct action_ops snd_pcm_action_start = { 881 .pre_action = snd_pcm_pre_start, 882 .do_action = snd_pcm_do_start, 883 .undo_action = snd_pcm_undo_start, 884 .post_action = snd_pcm_post_start 885 }; 886 887 /** 888 * snd_pcm_start - start all linked streams 889 * @substream: the PCM substream instance 890 */ 891 int snd_pcm_start(struct snd_pcm_substream *substream) 892 { 893 return snd_pcm_action(&snd_pcm_action_start, substream, 894 SNDRV_PCM_STATE_RUNNING); 895 } 896 897 /* 898 * stop callbacks 899 */ 900 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state) 901 { 902 struct snd_pcm_runtime *runtime = substream->runtime; 903 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 904 return -EBADFD; 905 runtime->trigger_master = substream; 906 return 0; 907 } 908 909 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state) 910 { 911 if (substream->runtime->trigger_master == substream && 912 snd_pcm_running(substream)) 913 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); 914 return 0; /* unconditonally stop all substreams */ 915 } 916 917 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state) 918 { 919 struct snd_pcm_runtime *runtime = substream->runtime; 920 if (runtime->status->state != state) { 921 snd_pcm_trigger_tstamp(substream); 922 if (substream->timer) 923 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP, 924 &runtime->trigger_tstamp); 925 runtime->status->state = state; 926 } 927 wake_up(&runtime->sleep); 928 wake_up(&runtime->tsleep); 929 } 930 931 static struct action_ops snd_pcm_action_stop = { 932 .pre_action = snd_pcm_pre_stop, 933 .do_action = snd_pcm_do_stop, 934 .post_action = snd_pcm_post_stop 935 }; 936 937 /** 938 * snd_pcm_stop - try to stop all running streams in the substream group 939 * @substream: the PCM substream instance 940 * @state: PCM state after stopping the stream 941 * 942 * The state of each stream is then changed to the given state unconditionally. 943 */ 944 int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state) 945 { 946 return snd_pcm_action(&snd_pcm_action_stop, substream, state); 947 } 948 949 EXPORT_SYMBOL(snd_pcm_stop); 950 951 /** 952 * snd_pcm_drain_done - stop the DMA only when the given stream is playback 953 * @substream: the PCM substream 954 * 955 * After stopping, the state is changed to SETUP. 956 * Unlike snd_pcm_stop(), this affects only the given stream. 957 */ 958 int snd_pcm_drain_done(struct snd_pcm_substream *substream) 959 { 960 return snd_pcm_action_single(&snd_pcm_action_stop, substream, 961 SNDRV_PCM_STATE_SETUP); 962 } 963 964 /* 965 * pause callbacks 966 */ 967 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push) 968 { 969 struct snd_pcm_runtime *runtime = substream->runtime; 970 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE)) 971 return -ENOSYS; 972 if (push) { 973 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING) 974 return -EBADFD; 975 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED) 976 return -EBADFD; 977 runtime->trigger_master = substream; 978 return 0; 979 } 980 981 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push) 982 { 983 if (substream->runtime->trigger_master != substream) 984 return 0; 985 /* some drivers might use hw_ptr to recover from the pause - 986 update the hw_ptr now */ 987 if (push) 988 snd_pcm_update_hw_ptr(substream); 989 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by 990 * a delta between the current jiffies, this gives a large enough 991 * delta, effectively to skip the check once. 992 */ 993 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000; 994 return substream->ops->trigger(substream, 995 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH : 996 SNDRV_PCM_TRIGGER_PAUSE_RELEASE); 997 } 998 999 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push) 1000 { 1001 if (substream->runtime->trigger_master == substream) 1002 substream->ops->trigger(substream, 1003 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE : 1004 SNDRV_PCM_TRIGGER_PAUSE_PUSH); 1005 } 1006 1007 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push) 1008 { 1009 struct snd_pcm_runtime *runtime = substream->runtime; 1010 snd_pcm_trigger_tstamp(substream); 1011 if (push) { 1012 runtime->status->state = SNDRV_PCM_STATE_PAUSED; 1013 if (substream->timer) 1014 snd_timer_notify(substream->timer, 1015 SNDRV_TIMER_EVENT_MPAUSE, 1016 &runtime->trigger_tstamp); 1017 wake_up(&runtime->sleep); 1018 wake_up(&runtime->tsleep); 1019 } else { 1020 runtime->status->state = SNDRV_PCM_STATE_RUNNING; 1021 if (substream->timer) 1022 snd_timer_notify(substream->timer, 1023 SNDRV_TIMER_EVENT_MCONTINUE, 1024 &runtime->trigger_tstamp); 1025 } 1026 } 1027 1028 static struct action_ops snd_pcm_action_pause = { 1029 .pre_action = snd_pcm_pre_pause, 1030 .do_action = snd_pcm_do_pause, 1031 .undo_action = snd_pcm_undo_pause, 1032 .post_action = snd_pcm_post_pause 1033 }; 1034 1035 /* 1036 * Push/release the pause for all linked streams. 1037 */ 1038 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push) 1039 { 1040 return snd_pcm_action(&snd_pcm_action_pause, substream, push); 1041 } 1042 1043 #ifdef CONFIG_PM 1044 /* suspend */ 1045 1046 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state) 1047 { 1048 struct snd_pcm_runtime *runtime = substream->runtime; 1049 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1050 return -EBUSY; 1051 runtime->trigger_master = substream; 1052 return 0; 1053 } 1054 1055 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state) 1056 { 1057 struct snd_pcm_runtime *runtime = substream->runtime; 1058 if (runtime->trigger_master != substream) 1059 return 0; 1060 if (! snd_pcm_running(substream)) 1061 return 0; 1062 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); 1063 return 0; /* suspend unconditionally */ 1064 } 1065 1066 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state) 1067 { 1068 struct snd_pcm_runtime *runtime = substream->runtime; 1069 snd_pcm_trigger_tstamp(substream); 1070 if (substream->timer) 1071 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND, 1072 &runtime->trigger_tstamp); 1073 runtime->status->suspended_state = runtime->status->state; 1074 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED; 1075 wake_up(&runtime->sleep); 1076 wake_up(&runtime->tsleep); 1077 } 1078 1079 static struct action_ops snd_pcm_action_suspend = { 1080 .pre_action = snd_pcm_pre_suspend, 1081 .do_action = snd_pcm_do_suspend, 1082 .post_action = snd_pcm_post_suspend 1083 }; 1084 1085 /** 1086 * snd_pcm_suspend - trigger SUSPEND to all linked streams 1087 * @substream: the PCM substream 1088 * 1089 * After this call, all streams are changed to SUSPENDED state. 1090 */ 1091 int snd_pcm_suspend(struct snd_pcm_substream *substream) 1092 { 1093 int err; 1094 unsigned long flags; 1095 1096 if (! substream) 1097 return 0; 1098 1099 snd_pcm_stream_lock_irqsave(substream, flags); 1100 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0); 1101 snd_pcm_stream_unlock_irqrestore(substream, flags); 1102 return err; 1103 } 1104 1105 EXPORT_SYMBOL(snd_pcm_suspend); 1106 1107 /** 1108 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm 1109 * @pcm: the PCM instance 1110 * 1111 * After this call, all streams are changed to SUSPENDED state. 1112 */ 1113 int snd_pcm_suspend_all(struct snd_pcm *pcm) 1114 { 1115 struct snd_pcm_substream *substream; 1116 int stream, err = 0; 1117 1118 if (! pcm) 1119 return 0; 1120 1121 for (stream = 0; stream < 2; stream++) { 1122 for (substream = pcm->streams[stream].substream; 1123 substream; substream = substream->next) { 1124 /* FIXME: the open/close code should lock this as well */ 1125 if (substream->runtime == NULL) 1126 continue; 1127 err = snd_pcm_suspend(substream); 1128 if (err < 0 && err != -EBUSY) 1129 return err; 1130 } 1131 } 1132 return 0; 1133 } 1134 1135 EXPORT_SYMBOL(snd_pcm_suspend_all); 1136 1137 /* resume */ 1138 1139 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state) 1140 { 1141 struct snd_pcm_runtime *runtime = substream->runtime; 1142 if (!(runtime->info & SNDRV_PCM_INFO_RESUME)) 1143 return -ENOSYS; 1144 runtime->trigger_master = substream; 1145 return 0; 1146 } 1147 1148 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state) 1149 { 1150 struct snd_pcm_runtime *runtime = substream->runtime; 1151 if (runtime->trigger_master != substream) 1152 return 0; 1153 /* DMA not running previously? */ 1154 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING && 1155 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING || 1156 substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) 1157 return 0; 1158 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME); 1159 } 1160 1161 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state) 1162 { 1163 if (substream->runtime->trigger_master == substream && 1164 snd_pcm_running(substream)) 1165 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); 1166 } 1167 1168 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state) 1169 { 1170 struct snd_pcm_runtime *runtime = substream->runtime; 1171 snd_pcm_trigger_tstamp(substream); 1172 if (substream->timer) 1173 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME, 1174 &runtime->trigger_tstamp); 1175 runtime->status->state = runtime->status->suspended_state; 1176 } 1177 1178 static struct action_ops snd_pcm_action_resume = { 1179 .pre_action = snd_pcm_pre_resume, 1180 .do_action = snd_pcm_do_resume, 1181 .undo_action = snd_pcm_undo_resume, 1182 .post_action = snd_pcm_post_resume 1183 }; 1184 1185 static int snd_pcm_resume(struct snd_pcm_substream *substream) 1186 { 1187 struct snd_card *card = substream->pcm->card; 1188 int res; 1189 1190 snd_power_lock(card); 1191 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) 1192 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0); 1193 snd_power_unlock(card); 1194 return res; 1195 } 1196 1197 #else 1198 1199 static int snd_pcm_resume(struct snd_pcm_substream *substream) 1200 { 1201 return -ENOSYS; 1202 } 1203 1204 #endif /* CONFIG_PM */ 1205 1206 /* 1207 * xrun ioctl 1208 * 1209 * Change the RUNNING stream(s) to XRUN state. 1210 */ 1211 static int snd_pcm_xrun(struct snd_pcm_substream *substream) 1212 { 1213 struct snd_card *card = substream->pcm->card; 1214 struct snd_pcm_runtime *runtime = substream->runtime; 1215 int result; 1216 1217 snd_power_lock(card); 1218 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1219 result = snd_power_wait(card, SNDRV_CTL_POWER_D0); 1220 if (result < 0) 1221 goto _unlock; 1222 } 1223 1224 snd_pcm_stream_lock_irq(substream); 1225 switch (runtime->status->state) { 1226 case SNDRV_PCM_STATE_XRUN: 1227 result = 0; /* already there */ 1228 break; 1229 case SNDRV_PCM_STATE_RUNNING: 1230 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); 1231 break; 1232 default: 1233 result = -EBADFD; 1234 } 1235 snd_pcm_stream_unlock_irq(substream); 1236 _unlock: 1237 snd_power_unlock(card); 1238 return result; 1239 } 1240 1241 /* 1242 * reset ioctl 1243 */ 1244 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state) 1245 { 1246 struct snd_pcm_runtime *runtime = substream->runtime; 1247 switch (runtime->status->state) { 1248 case SNDRV_PCM_STATE_RUNNING: 1249 case SNDRV_PCM_STATE_PREPARED: 1250 case SNDRV_PCM_STATE_PAUSED: 1251 case SNDRV_PCM_STATE_SUSPENDED: 1252 return 0; 1253 default: 1254 return -EBADFD; 1255 } 1256 } 1257 1258 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state) 1259 { 1260 struct snd_pcm_runtime *runtime = substream->runtime; 1261 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL); 1262 if (err < 0) 1263 return err; 1264 runtime->hw_ptr_base = 0; 1265 runtime->hw_ptr_interrupt = runtime->status->hw_ptr - 1266 runtime->status->hw_ptr % runtime->period_size; 1267 runtime->silence_start = runtime->status->hw_ptr; 1268 runtime->silence_filled = 0; 1269 return 0; 1270 } 1271 1272 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state) 1273 { 1274 struct snd_pcm_runtime *runtime = substream->runtime; 1275 runtime->control->appl_ptr = runtime->status->hw_ptr; 1276 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 1277 runtime->silence_size > 0) 1278 snd_pcm_playback_silence(substream, ULONG_MAX); 1279 } 1280 1281 static struct action_ops snd_pcm_action_reset = { 1282 .pre_action = snd_pcm_pre_reset, 1283 .do_action = snd_pcm_do_reset, 1284 .post_action = snd_pcm_post_reset 1285 }; 1286 1287 static int snd_pcm_reset(struct snd_pcm_substream *substream) 1288 { 1289 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0); 1290 } 1291 1292 /* 1293 * prepare ioctl 1294 */ 1295 /* we use the second argument for updating f_flags */ 1296 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream, 1297 int f_flags) 1298 { 1299 struct snd_pcm_runtime *runtime = substream->runtime; 1300 if (runtime->status->state == SNDRV_PCM_STATE_OPEN || 1301 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED) 1302 return -EBADFD; 1303 if (snd_pcm_running(substream)) 1304 return -EBUSY; 1305 substream->f_flags = f_flags; 1306 return 0; 1307 } 1308 1309 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state) 1310 { 1311 int err; 1312 err = substream->ops->prepare(substream); 1313 if (err < 0) 1314 return err; 1315 return snd_pcm_do_reset(substream, 0); 1316 } 1317 1318 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state) 1319 { 1320 struct snd_pcm_runtime *runtime = substream->runtime; 1321 runtime->control->appl_ptr = runtime->status->hw_ptr; 1322 runtime->status->state = SNDRV_PCM_STATE_PREPARED; 1323 } 1324 1325 static struct action_ops snd_pcm_action_prepare = { 1326 .pre_action = snd_pcm_pre_prepare, 1327 .do_action = snd_pcm_do_prepare, 1328 .post_action = snd_pcm_post_prepare 1329 }; 1330 1331 /** 1332 * snd_pcm_prepare - prepare the PCM substream to be triggerable 1333 * @substream: the PCM substream instance 1334 * @file: file to refer f_flags 1335 */ 1336 static int snd_pcm_prepare(struct snd_pcm_substream *substream, 1337 struct file *file) 1338 { 1339 int res; 1340 struct snd_card *card = substream->pcm->card; 1341 int f_flags; 1342 1343 if (file) 1344 f_flags = file->f_flags; 1345 else 1346 f_flags = substream->f_flags; 1347 1348 snd_power_lock(card); 1349 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) 1350 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare, 1351 substream, f_flags); 1352 snd_power_unlock(card); 1353 return res; 1354 } 1355 1356 /* 1357 * drain ioctl 1358 */ 1359 1360 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state) 1361 { 1362 substream->runtime->trigger_master = substream; 1363 return 0; 1364 } 1365 1366 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state) 1367 { 1368 struct snd_pcm_runtime *runtime = substream->runtime; 1369 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 1370 switch (runtime->status->state) { 1371 case SNDRV_PCM_STATE_PREPARED: 1372 /* start playback stream if possible */ 1373 if (! snd_pcm_playback_empty(substream)) { 1374 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING); 1375 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING); 1376 } 1377 break; 1378 case SNDRV_PCM_STATE_RUNNING: 1379 runtime->status->state = SNDRV_PCM_STATE_DRAINING; 1380 break; 1381 default: 1382 break; 1383 } 1384 } else { 1385 /* stop running stream */ 1386 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) { 1387 int new_state = snd_pcm_capture_avail(runtime) > 0 ? 1388 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP; 1389 snd_pcm_do_stop(substream, new_state); 1390 snd_pcm_post_stop(substream, new_state); 1391 } 1392 } 1393 return 0; 1394 } 1395 1396 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state) 1397 { 1398 } 1399 1400 static struct action_ops snd_pcm_action_drain_init = { 1401 .pre_action = snd_pcm_pre_drain_init, 1402 .do_action = snd_pcm_do_drain_init, 1403 .post_action = snd_pcm_post_drain_init 1404 }; 1405 1406 static int snd_pcm_drop(struct snd_pcm_substream *substream); 1407 1408 /* 1409 * Drain the stream(s). 1410 * When the substream is linked, sync until the draining of all playback streams 1411 * is finished. 1412 * After this call, all streams are supposed to be either SETUP or DRAINING 1413 * (capture only) state. 1414 */ 1415 static int snd_pcm_drain(struct snd_pcm_substream *substream, 1416 struct file *file) 1417 { 1418 struct snd_card *card; 1419 struct snd_pcm_runtime *runtime; 1420 struct snd_pcm_substream *s; 1421 wait_queue_t wait; 1422 int result = 0; 1423 int nonblock = 0; 1424 1425 card = substream->pcm->card; 1426 runtime = substream->runtime; 1427 1428 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 1429 return -EBADFD; 1430 1431 snd_power_lock(card); 1432 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1433 result = snd_power_wait(card, SNDRV_CTL_POWER_D0); 1434 if (result < 0) { 1435 snd_power_unlock(card); 1436 return result; 1437 } 1438 } 1439 1440 if (file) { 1441 if (file->f_flags & O_NONBLOCK) 1442 nonblock = 1; 1443 } else if (substream->f_flags & O_NONBLOCK) 1444 nonblock = 1; 1445 1446 down_read(&snd_pcm_link_rwsem); 1447 snd_pcm_stream_lock_irq(substream); 1448 /* resume pause */ 1449 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) 1450 snd_pcm_pause(substream, 0); 1451 1452 /* pre-start/stop - all running streams are changed to DRAINING state */ 1453 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0); 1454 if (result < 0) 1455 goto unlock; 1456 /* in non-blocking, we don't wait in ioctl but let caller poll */ 1457 if (nonblock) { 1458 result = -EAGAIN; 1459 goto unlock; 1460 } 1461 1462 for (;;) { 1463 long tout; 1464 struct snd_pcm_runtime *to_check; 1465 if (signal_pending(current)) { 1466 result = -ERESTARTSYS; 1467 break; 1468 } 1469 /* find a substream to drain */ 1470 to_check = NULL; 1471 snd_pcm_group_for_each_entry(s, substream) { 1472 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK) 1473 continue; 1474 runtime = s->runtime; 1475 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 1476 to_check = runtime; 1477 break; 1478 } 1479 } 1480 if (!to_check) 1481 break; /* all drained */ 1482 init_waitqueue_entry(&wait, current); 1483 add_wait_queue(&to_check->sleep, &wait); 1484 snd_pcm_stream_unlock_irq(substream); 1485 up_read(&snd_pcm_link_rwsem); 1486 snd_power_unlock(card); 1487 if (runtime->no_period_wakeup) 1488 tout = MAX_SCHEDULE_TIMEOUT; 1489 else { 1490 tout = 10; 1491 if (runtime->rate) { 1492 long t = runtime->period_size * 2 / runtime->rate; 1493 tout = max(t, tout); 1494 } 1495 tout = msecs_to_jiffies(tout * 1000); 1496 } 1497 tout = schedule_timeout_interruptible(tout); 1498 snd_power_lock(card); 1499 down_read(&snd_pcm_link_rwsem); 1500 snd_pcm_stream_lock_irq(substream); 1501 remove_wait_queue(&to_check->sleep, &wait); 1502 if (tout == 0) { 1503 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1504 result = -ESTRPIPE; 1505 else { 1506 snd_printd("playback drain error (DMA or IRQ trouble?)\n"); 1507 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1508 result = -EIO; 1509 } 1510 break; 1511 } 1512 } 1513 1514 unlock: 1515 snd_pcm_stream_unlock_irq(substream); 1516 up_read(&snd_pcm_link_rwsem); 1517 snd_power_unlock(card); 1518 1519 return result; 1520 } 1521 1522 /* 1523 * drop ioctl 1524 * 1525 * Immediately put all linked substreams into SETUP state. 1526 */ 1527 static int snd_pcm_drop(struct snd_pcm_substream *substream) 1528 { 1529 struct snd_pcm_runtime *runtime; 1530 int result = 0; 1531 1532 if (PCM_RUNTIME_CHECK(substream)) 1533 return -ENXIO; 1534 runtime = substream->runtime; 1535 1536 if (runtime->status->state == SNDRV_PCM_STATE_OPEN || 1537 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED || 1538 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1539 return -EBADFD; 1540 1541 snd_pcm_stream_lock_irq(substream); 1542 /* resume pause */ 1543 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) 1544 snd_pcm_pause(substream, 0); 1545 1546 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1547 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */ 1548 snd_pcm_stream_unlock_irq(substream); 1549 1550 return result; 1551 } 1552 1553 1554 /* WARNING: Don't forget to fput back the file */ 1555 static struct file *snd_pcm_file_fd(int fd) 1556 { 1557 struct file *file; 1558 struct inode *inode; 1559 unsigned int minor; 1560 1561 file = fget(fd); 1562 if (!file) 1563 return NULL; 1564 inode = file->f_path.dentry->d_inode; 1565 if (!S_ISCHR(inode->i_mode) || 1566 imajor(inode) != snd_major) { 1567 fput(file); 1568 return NULL; 1569 } 1570 minor = iminor(inode); 1571 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) && 1572 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) { 1573 fput(file); 1574 return NULL; 1575 } 1576 return file; 1577 } 1578 1579 /* 1580 * PCM link handling 1581 */ 1582 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd) 1583 { 1584 int res = 0; 1585 struct file *file; 1586 struct snd_pcm_file *pcm_file; 1587 struct snd_pcm_substream *substream1; 1588 1589 file = snd_pcm_file_fd(fd); 1590 if (!file) 1591 return -EBADFD; 1592 pcm_file = file->private_data; 1593 substream1 = pcm_file->substream; 1594 down_write(&snd_pcm_link_rwsem); 1595 write_lock_irq(&snd_pcm_link_rwlock); 1596 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN || 1597 substream->runtime->status->state != substream1->runtime->status->state) { 1598 res = -EBADFD; 1599 goto _end; 1600 } 1601 if (snd_pcm_stream_linked(substream1)) { 1602 res = -EALREADY; 1603 goto _end; 1604 } 1605 if (!snd_pcm_stream_linked(substream)) { 1606 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC); 1607 if (substream->group == NULL) { 1608 res = -ENOMEM; 1609 goto _end; 1610 } 1611 spin_lock_init(&substream->group->lock); 1612 INIT_LIST_HEAD(&substream->group->substreams); 1613 list_add_tail(&substream->link_list, &substream->group->substreams); 1614 substream->group->count = 1; 1615 } 1616 list_add_tail(&substream1->link_list, &substream->group->substreams); 1617 substream->group->count++; 1618 substream1->group = substream->group; 1619 _end: 1620 write_unlock_irq(&snd_pcm_link_rwlock); 1621 up_write(&snd_pcm_link_rwsem); 1622 fput(file); 1623 return res; 1624 } 1625 1626 static void relink_to_local(struct snd_pcm_substream *substream) 1627 { 1628 substream->group = &substream->self_group; 1629 INIT_LIST_HEAD(&substream->self_group.substreams); 1630 list_add_tail(&substream->link_list, &substream->self_group.substreams); 1631 } 1632 1633 static int snd_pcm_unlink(struct snd_pcm_substream *substream) 1634 { 1635 struct snd_pcm_substream *s; 1636 int res = 0; 1637 1638 down_write(&snd_pcm_link_rwsem); 1639 write_lock_irq(&snd_pcm_link_rwlock); 1640 if (!snd_pcm_stream_linked(substream)) { 1641 res = -EALREADY; 1642 goto _end; 1643 } 1644 list_del(&substream->link_list); 1645 substream->group->count--; 1646 if (substream->group->count == 1) { /* detach the last stream, too */ 1647 snd_pcm_group_for_each_entry(s, substream) { 1648 relink_to_local(s); 1649 break; 1650 } 1651 kfree(substream->group); 1652 } 1653 relink_to_local(substream); 1654 _end: 1655 write_unlock_irq(&snd_pcm_link_rwlock); 1656 up_write(&snd_pcm_link_rwsem); 1657 return res; 1658 } 1659 1660 /* 1661 * hw configurator 1662 */ 1663 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params, 1664 struct snd_pcm_hw_rule *rule) 1665 { 1666 struct snd_interval t; 1667 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]), 1668 hw_param_interval_c(params, rule->deps[1]), &t); 1669 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1670 } 1671 1672 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params, 1673 struct snd_pcm_hw_rule *rule) 1674 { 1675 struct snd_interval t; 1676 snd_interval_div(hw_param_interval_c(params, rule->deps[0]), 1677 hw_param_interval_c(params, rule->deps[1]), &t); 1678 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1679 } 1680 1681 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params, 1682 struct snd_pcm_hw_rule *rule) 1683 { 1684 struct snd_interval t; 1685 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]), 1686 hw_param_interval_c(params, rule->deps[1]), 1687 (unsigned long) rule->private, &t); 1688 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1689 } 1690 1691 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params, 1692 struct snd_pcm_hw_rule *rule) 1693 { 1694 struct snd_interval t; 1695 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]), 1696 (unsigned long) rule->private, 1697 hw_param_interval_c(params, rule->deps[1]), &t); 1698 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1699 } 1700 1701 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params, 1702 struct snd_pcm_hw_rule *rule) 1703 { 1704 unsigned int k; 1705 struct snd_interval *i = hw_param_interval(params, rule->deps[0]); 1706 struct snd_mask m; 1707 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 1708 snd_mask_any(&m); 1709 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { 1710 int bits; 1711 if (! snd_mask_test(mask, k)) 1712 continue; 1713 bits = snd_pcm_format_physical_width(k); 1714 if (bits <= 0) 1715 continue; /* ignore invalid formats */ 1716 if ((unsigned)bits < i->min || (unsigned)bits > i->max) 1717 snd_mask_reset(&m, k); 1718 } 1719 return snd_mask_refine(mask, &m); 1720 } 1721 1722 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params, 1723 struct snd_pcm_hw_rule *rule) 1724 { 1725 struct snd_interval t; 1726 unsigned int k; 1727 t.min = UINT_MAX; 1728 t.max = 0; 1729 t.openmin = 0; 1730 t.openmax = 0; 1731 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { 1732 int bits; 1733 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k)) 1734 continue; 1735 bits = snd_pcm_format_physical_width(k); 1736 if (bits <= 0) 1737 continue; /* ignore invalid formats */ 1738 if (t.min > (unsigned)bits) 1739 t.min = bits; 1740 if (t.max < (unsigned)bits) 1741 t.max = bits; 1742 } 1743 t.integer = 1; 1744 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1745 } 1746 1747 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12 1748 #error "Change this table" 1749 #endif 1750 1751 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100, 1752 48000, 64000, 88200, 96000, 176400, 192000 }; 1753 1754 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = { 1755 .count = ARRAY_SIZE(rates), 1756 .list = rates, 1757 }; 1758 1759 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params, 1760 struct snd_pcm_hw_rule *rule) 1761 { 1762 struct snd_pcm_hardware *hw = rule->private; 1763 return snd_interval_list(hw_param_interval(params, rule->var), 1764 snd_pcm_known_rates.count, 1765 snd_pcm_known_rates.list, hw->rates); 1766 } 1767 1768 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params, 1769 struct snd_pcm_hw_rule *rule) 1770 { 1771 struct snd_interval t; 1772 struct snd_pcm_substream *substream = rule->private; 1773 t.min = 0; 1774 t.max = substream->buffer_bytes_max; 1775 t.openmin = 0; 1776 t.openmax = 0; 1777 t.integer = 1; 1778 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1779 } 1780 1781 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream) 1782 { 1783 struct snd_pcm_runtime *runtime = substream->runtime; 1784 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; 1785 int k, err; 1786 1787 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { 1788 snd_mask_any(constrs_mask(constrs, k)); 1789 } 1790 1791 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { 1792 snd_interval_any(constrs_interval(constrs, k)); 1793 } 1794 1795 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS)); 1796 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)); 1797 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)); 1798 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)); 1799 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS)); 1800 1801 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, 1802 snd_pcm_hw_rule_format, NULL, 1803 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1804 if (err < 0) 1805 return err; 1806 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 1807 snd_pcm_hw_rule_sample_bits, NULL, 1808 SNDRV_PCM_HW_PARAM_FORMAT, 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_div, NULL, 1814 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); 1815 if (err < 0) 1816 return err; 1817 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1818 snd_pcm_hw_rule_mul, NULL, 1819 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); 1820 if (err < 0) 1821 return err; 1822 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1823 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1824 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 1825 if (err < 0) 1826 return err; 1827 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1828 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1829 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1); 1830 if (err < 0) 1831 return err; 1832 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 1833 snd_pcm_hw_rule_div, NULL, 1834 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1835 if (err < 0) 1836 return err; 1837 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1838 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1839 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1); 1840 if (err < 0) 1841 return err; 1842 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1843 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1844 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1); 1845 if (err < 0) 1846 return err; 1847 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, 1848 snd_pcm_hw_rule_div, NULL, 1849 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 1850 if (err < 0) 1851 return err; 1852 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1853 snd_pcm_hw_rule_div, NULL, 1854 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); 1855 if (err < 0) 1856 return err; 1857 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1858 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1859 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1860 if (err < 0) 1861 return err; 1862 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1863 snd_pcm_hw_rule_muldivk, (void*) 1000000, 1864 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); 1865 if (err < 0) 1866 return err; 1867 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1868 snd_pcm_hw_rule_mul, NULL, 1869 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); 1870 if (err < 0) 1871 return err; 1872 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1873 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1874 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1875 if (err < 0) 1876 return err; 1877 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1878 snd_pcm_hw_rule_muldivk, (void*) 1000000, 1879 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); 1880 if (err < 0) 1881 return err; 1882 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 1883 snd_pcm_hw_rule_muldivk, (void*) 8, 1884 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1885 if (err < 0) 1886 return err; 1887 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1888 snd_pcm_hw_rule_muldivk, (void*) 8, 1889 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1890 if (err < 0) 1891 return err; 1892 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 1893 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1894 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); 1895 if (err < 0) 1896 return err; 1897 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME, 1898 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1899 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); 1900 if (err < 0) 1901 return err; 1902 return 0; 1903 } 1904 1905 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream) 1906 { 1907 struct snd_pcm_runtime *runtime = substream->runtime; 1908 struct snd_pcm_hardware *hw = &runtime->hw; 1909 int err; 1910 unsigned int mask = 0; 1911 1912 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) 1913 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED; 1914 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) 1915 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED; 1916 if (hw->info & SNDRV_PCM_INFO_MMAP) { 1917 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) 1918 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; 1919 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) 1920 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED; 1921 if (hw->info & SNDRV_PCM_INFO_COMPLEX) 1922 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX; 1923 } 1924 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask); 1925 if (err < 0) 1926 return err; 1927 1928 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats); 1929 if (err < 0) 1930 return err; 1931 1932 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD); 1933 if (err < 0) 1934 return err; 1935 1936 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, 1937 hw->channels_min, hw->channels_max); 1938 if (err < 0) 1939 return err; 1940 1941 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE, 1942 hw->rate_min, hw->rate_max); 1943 if (err < 0) 1944 return err; 1945 1946 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 1947 hw->period_bytes_min, hw->period_bytes_max); 1948 if (err < 0) 1949 return err; 1950 1951 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS, 1952 hw->periods_min, hw->periods_max); 1953 if (err < 0) 1954 return err; 1955 1956 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1957 hw->period_bytes_min, hw->buffer_bytes_max); 1958 if (err < 0) 1959 return err; 1960 1961 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1962 snd_pcm_hw_rule_buffer_bytes_max, substream, 1963 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1); 1964 if (err < 0) 1965 return err; 1966 1967 /* FIXME: remove */ 1968 if (runtime->dma_bytes) { 1969 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes); 1970 if (err < 0) 1971 return -EINVAL; 1972 } 1973 1974 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) { 1975 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1976 snd_pcm_hw_rule_rate, hw, 1977 SNDRV_PCM_HW_PARAM_RATE, -1); 1978 if (err < 0) 1979 return err; 1980 } 1981 1982 /* FIXME: this belong to lowlevel */ 1983 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE); 1984 1985 return 0; 1986 } 1987 1988 static void pcm_release_private(struct snd_pcm_substream *substream) 1989 { 1990 snd_pcm_unlink(substream); 1991 } 1992 1993 void snd_pcm_release_substream(struct snd_pcm_substream *substream) 1994 { 1995 substream->ref_count--; 1996 if (substream->ref_count > 0) 1997 return; 1998 1999 snd_pcm_drop(substream); 2000 if (substream->hw_opened) { 2001 if (substream->ops->hw_free != NULL) 2002 substream->ops->hw_free(substream); 2003 substream->ops->close(substream); 2004 substream->hw_opened = 0; 2005 } 2006 if (pm_qos_request_active(&substream->latency_pm_qos_req)) 2007 pm_qos_remove_request(&substream->latency_pm_qos_req); 2008 if (substream->pcm_release) { 2009 substream->pcm_release(substream); 2010 substream->pcm_release = NULL; 2011 } 2012 snd_pcm_detach_substream(substream); 2013 } 2014 2015 EXPORT_SYMBOL(snd_pcm_release_substream); 2016 2017 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, 2018 struct file *file, 2019 struct snd_pcm_substream **rsubstream) 2020 { 2021 struct snd_pcm_substream *substream; 2022 int err; 2023 2024 err = snd_pcm_attach_substream(pcm, stream, file, &substream); 2025 if (err < 0) 2026 return err; 2027 if (substream->ref_count > 1) { 2028 *rsubstream = substream; 2029 return 0; 2030 } 2031 2032 err = snd_pcm_hw_constraints_init(substream); 2033 if (err < 0) { 2034 snd_printd("snd_pcm_hw_constraints_init failed\n"); 2035 goto error; 2036 } 2037 2038 if ((err = substream->ops->open(substream)) < 0) 2039 goto error; 2040 2041 substream->hw_opened = 1; 2042 2043 err = snd_pcm_hw_constraints_complete(substream); 2044 if (err < 0) { 2045 snd_printd("snd_pcm_hw_constraints_complete failed\n"); 2046 goto error; 2047 } 2048 2049 *rsubstream = substream; 2050 return 0; 2051 2052 error: 2053 snd_pcm_release_substream(substream); 2054 return err; 2055 } 2056 2057 EXPORT_SYMBOL(snd_pcm_open_substream); 2058 2059 static int snd_pcm_open_file(struct file *file, 2060 struct snd_pcm *pcm, 2061 int stream) 2062 { 2063 struct snd_pcm_file *pcm_file; 2064 struct snd_pcm_substream *substream; 2065 int err; 2066 2067 err = snd_pcm_open_substream(pcm, stream, file, &substream); 2068 if (err < 0) 2069 return err; 2070 2071 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL); 2072 if (pcm_file == NULL) { 2073 snd_pcm_release_substream(substream); 2074 return -ENOMEM; 2075 } 2076 pcm_file->substream = substream; 2077 if (substream->ref_count == 1) { 2078 substream->file = pcm_file; 2079 substream->pcm_release = pcm_release_private; 2080 } 2081 file->private_data = pcm_file; 2082 2083 return 0; 2084 } 2085 2086 static int snd_pcm_playback_open(struct inode *inode, struct file *file) 2087 { 2088 struct snd_pcm *pcm; 2089 int err = nonseekable_open(inode, file); 2090 if (err < 0) 2091 return err; 2092 pcm = snd_lookup_minor_data(iminor(inode), 2093 SNDRV_DEVICE_TYPE_PCM_PLAYBACK); 2094 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK); 2095 } 2096 2097 static int snd_pcm_capture_open(struct inode *inode, struct file *file) 2098 { 2099 struct snd_pcm *pcm; 2100 int err = nonseekable_open(inode, file); 2101 if (err < 0) 2102 return err; 2103 pcm = snd_lookup_minor_data(iminor(inode), 2104 SNDRV_DEVICE_TYPE_PCM_CAPTURE); 2105 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE); 2106 } 2107 2108 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream) 2109 { 2110 int err; 2111 wait_queue_t wait; 2112 2113 if (pcm == NULL) { 2114 err = -ENODEV; 2115 goto __error1; 2116 } 2117 err = snd_card_file_add(pcm->card, file); 2118 if (err < 0) 2119 goto __error1; 2120 if (!try_module_get(pcm->card->module)) { 2121 err = -EFAULT; 2122 goto __error2; 2123 } 2124 init_waitqueue_entry(&wait, current); 2125 add_wait_queue(&pcm->open_wait, &wait); 2126 mutex_lock(&pcm->open_mutex); 2127 while (1) { 2128 err = snd_pcm_open_file(file, pcm, stream); 2129 if (err >= 0) 2130 break; 2131 if (err == -EAGAIN) { 2132 if (file->f_flags & O_NONBLOCK) { 2133 err = -EBUSY; 2134 break; 2135 } 2136 } else 2137 break; 2138 set_current_state(TASK_INTERRUPTIBLE); 2139 mutex_unlock(&pcm->open_mutex); 2140 schedule(); 2141 mutex_lock(&pcm->open_mutex); 2142 if (signal_pending(current)) { 2143 err = -ERESTARTSYS; 2144 break; 2145 } 2146 } 2147 remove_wait_queue(&pcm->open_wait, &wait); 2148 mutex_unlock(&pcm->open_mutex); 2149 if (err < 0) 2150 goto __error; 2151 return err; 2152 2153 __error: 2154 module_put(pcm->card->module); 2155 __error2: 2156 snd_card_file_remove(pcm->card, file); 2157 __error1: 2158 return err; 2159 } 2160 2161 static int snd_pcm_release(struct inode *inode, struct file *file) 2162 { 2163 struct snd_pcm *pcm; 2164 struct snd_pcm_substream *substream; 2165 struct snd_pcm_file *pcm_file; 2166 2167 pcm_file = file->private_data; 2168 substream = pcm_file->substream; 2169 if (snd_BUG_ON(!substream)) 2170 return -ENXIO; 2171 pcm = substream->pcm; 2172 mutex_lock(&pcm->open_mutex); 2173 snd_pcm_release_substream(substream); 2174 kfree(pcm_file); 2175 mutex_unlock(&pcm->open_mutex); 2176 wake_up(&pcm->open_wait); 2177 module_put(pcm->card->module); 2178 snd_card_file_remove(pcm->card, file); 2179 return 0; 2180 } 2181 2182 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream, 2183 snd_pcm_uframes_t frames) 2184 { 2185 struct snd_pcm_runtime *runtime = substream->runtime; 2186 snd_pcm_sframes_t appl_ptr; 2187 snd_pcm_sframes_t ret; 2188 snd_pcm_sframes_t hw_avail; 2189 2190 if (frames == 0) 2191 return 0; 2192 2193 snd_pcm_stream_lock_irq(substream); 2194 switch (runtime->status->state) { 2195 case SNDRV_PCM_STATE_PREPARED: 2196 break; 2197 case SNDRV_PCM_STATE_DRAINING: 2198 case SNDRV_PCM_STATE_RUNNING: 2199 if (snd_pcm_update_hw_ptr(substream) >= 0) 2200 break; 2201 /* Fall through */ 2202 case SNDRV_PCM_STATE_XRUN: 2203 ret = -EPIPE; 2204 goto __end; 2205 case SNDRV_PCM_STATE_SUSPENDED: 2206 ret = -ESTRPIPE; 2207 goto __end; 2208 default: 2209 ret = -EBADFD; 2210 goto __end; 2211 } 2212 2213 hw_avail = snd_pcm_playback_hw_avail(runtime); 2214 if (hw_avail <= 0) { 2215 ret = 0; 2216 goto __end; 2217 } 2218 if (frames > (snd_pcm_uframes_t)hw_avail) 2219 frames = hw_avail; 2220 appl_ptr = runtime->control->appl_ptr - frames; 2221 if (appl_ptr < 0) 2222 appl_ptr += runtime->boundary; 2223 runtime->control->appl_ptr = appl_ptr; 2224 ret = frames; 2225 __end: 2226 snd_pcm_stream_unlock_irq(substream); 2227 return ret; 2228 } 2229 2230 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream, 2231 snd_pcm_uframes_t frames) 2232 { 2233 struct snd_pcm_runtime *runtime = substream->runtime; 2234 snd_pcm_sframes_t appl_ptr; 2235 snd_pcm_sframes_t ret; 2236 snd_pcm_sframes_t hw_avail; 2237 2238 if (frames == 0) 2239 return 0; 2240 2241 snd_pcm_stream_lock_irq(substream); 2242 switch (runtime->status->state) { 2243 case SNDRV_PCM_STATE_PREPARED: 2244 case SNDRV_PCM_STATE_DRAINING: 2245 break; 2246 case SNDRV_PCM_STATE_RUNNING: 2247 if (snd_pcm_update_hw_ptr(substream) >= 0) 2248 break; 2249 /* Fall through */ 2250 case SNDRV_PCM_STATE_XRUN: 2251 ret = -EPIPE; 2252 goto __end; 2253 case SNDRV_PCM_STATE_SUSPENDED: 2254 ret = -ESTRPIPE; 2255 goto __end; 2256 default: 2257 ret = -EBADFD; 2258 goto __end; 2259 } 2260 2261 hw_avail = snd_pcm_capture_hw_avail(runtime); 2262 if (hw_avail <= 0) { 2263 ret = 0; 2264 goto __end; 2265 } 2266 if (frames > (snd_pcm_uframes_t)hw_avail) 2267 frames = hw_avail; 2268 appl_ptr = runtime->control->appl_ptr - frames; 2269 if (appl_ptr < 0) 2270 appl_ptr += runtime->boundary; 2271 runtime->control->appl_ptr = appl_ptr; 2272 ret = frames; 2273 __end: 2274 snd_pcm_stream_unlock_irq(substream); 2275 return ret; 2276 } 2277 2278 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream, 2279 snd_pcm_uframes_t frames) 2280 { 2281 struct snd_pcm_runtime *runtime = substream->runtime; 2282 snd_pcm_sframes_t appl_ptr; 2283 snd_pcm_sframes_t ret; 2284 snd_pcm_sframes_t avail; 2285 2286 if (frames == 0) 2287 return 0; 2288 2289 snd_pcm_stream_lock_irq(substream); 2290 switch (runtime->status->state) { 2291 case SNDRV_PCM_STATE_PREPARED: 2292 case SNDRV_PCM_STATE_PAUSED: 2293 break; 2294 case SNDRV_PCM_STATE_DRAINING: 2295 case SNDRV_PCM_STATE_RUNNING: 2296 if (snd_pcm_update_hw_ptr(substream) >= 0) 2297 break; 2298 /* Fall through */ 2299 case SNDRV_PCM_STATE_XRUN: 2300 ret = -EPIPE; 2301 goto __end; 2302 case SNDRV_PCM_STATE_SUSPENDED: 2303 ret = -ESTRPIPE; 2304 goto __end; 2305 default: 2306 ret = -EBADFD; 2307 goto __end; 2308 } 2309 2310 avail = snd_pcm_playback_avail(runtime); 2311 if (avail <= 0) { 2312 ret = 0; 2313 goto __end; 2314 } 2315 if (frames > (snd_pcm_uframes_t)avail) 2316 frames = avail; 2317 appl_ptr = runtime->control->appl_ptr + frames; 2318 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) 2319 appl_ptr -= runtime->boundary; 2320 runtime->control->appl_ptr = appl_ptr; 2321 ret = frames; 2322 __end: 2323 snd_pcm_stream_unlock_irq(substream); 2324 return ret; 2325 } 2326 2327 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream, 2328 snd_pcm_uframes_t frames) 2329 { 2330 struct snd_pcm_runtime *runtime = substream->runtime; 2331 snd_pcm_sframes_t appl_ptr; 2332 snd_pcm_sframes_t ret; 2333 snd_pcm_sframes_t avail; 2334 2335 if (frames == 0) 2336 return 0; 2337 2338 snd_pcm_stream_lock_irq(substream); 2339 switch (runtime->status->state) { 2340 case SNDRV_PCM_STATE_PREPARED: 2341 case SNDRV_PCM_STATE_DRAINING: 2342 case SNDRV_PCM_STATE_PAUSED: 2343 break; 2344 case SNDRV_PCM_STATE_RUNNING: 2345 if (snd_pcm_update_hw_ptr(substream) >= 0) 2346 break; 2347 /* Fall through */ 2348 case SNDRV_PCM_STATE_XRUN: 2349 ret = -EPIPE; 2350 goto __end; 2351 case SNDRV_PCM_STATE_SUSPENDED: 2352 ret = -ESTRPIPE; 2353 goto __end; 2354 default: 2355 ret = -EBADFD; 2356 goto __end; 2357 } 2358 2359 avail = snd_pcm_capture_avail(runtime); 2360 if (avail <= 0) { 2361 ret = 0; 2362 goto __end; 2363 } 2364 if (frames > (snd_pcm_uframes_t)avail) 2365 frames = avail; 2366 appl_ptr = runtime->control->appl_ptr + frames; 2367 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) 2368 appl_ptr -= runtime->boundary; 2369 runtime->control->appl_ptr = appl_ptr; 2370 ret = frames; 2371 __end: 2372 snd_pcm_stream_unlock_irq(substream); 2373 return ret; 2374 } 2375 2376 static int snd_pcm_hwsync(struct snd_pcm_substream *substream) 2377 { 2378 struct snd_pcm_runtime *runtime = substream->runtime; 2379 int err; 2380 2381 snd_pcm_stream_lock_irq(substream); 2382 switch (runtime->status->state) { 2383 case SNDRV_PCM_STATE_DRAINING: 2384 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 2385 goto __badfd; 2386 case SNDRV_PCM_STATE_RUNNING: 2387 if ((err = snd_pcm_update_hw_ptr(substream)) < 0) 2388 break; 2389 /* Fall through */ 2390 case SNDRV_PCM_STATE_PREPARED: 2391 case SNDRV_PCM_STATE_SUSPENDED: 2392 err = 0; 2393 break; 2394 case SNDRV_PCM_STATE_XRUN: 2395 err = -EPIPE; 2396 break; 2397 default: 2398 __badfd: 2399 err = -EBADFD; 2400 break; 2401 } 2402 snd_pcm_stream_unlock_irq(substream); 2403 return err; 2404 } 2405 2406 static int snd_pcm_delay(struct snd_pcm_substream *substream, 2407 snd_pcm_sframes_t __user *res) 2408 { 2409 struct snd_pcm_runtime *runtime = substream->runtime; 2410 int err; 2411 snd_pcm_sframes_t n = 0; 2412 2413 snd_pcm_stream_lock_irq(substream); 2414 switch (runtime->status->state) { 2415 case SNDRV_PCM_STATE_DRAINING: 2416 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 2417 goto __badfd; 2418 case SNDRV_PCM_STATE_RUNNING: 2419 if ((err = snd_pcm_update_hw_ptr(substream)) < 0) 2420 break; 2421 /* Fall through */ 2422 case SNDRV_PCM_STATE_PREPARED: 2423 case SNDRV_PCM_STATE_SUSPENDED: 2424 err = 0; 2425 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2426 n = snd_pcm_playback_hw_avail(runtime); 2427 else 2428 n = snd_pcm_capture_avail(runtime); 2429 n += runtime->delay; 2430 break; 2431 case SNDRV_PCM_STATE_XRUN: 2432 err = -EPIPE; 2433 break; 2434 default: 2435 __badfd: 2436 err = -EBADFD; 2437 break; 2438 } 2439 snd_pcm_stream_unlock_irq(substream); 2440 if (!err) 2441 if (put_user(n, res)) 2442 err = -EFAULT; 2443 return err; 2444 } 2445 2446 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream, 2447 struct snd_pcm_sync_ptr __user *_sync_ptr) 2448 { 2449 struct snd_pcm_runtime *runtime = substream->runtime; 2450 struct snd_pcm_sync_ptr sync_ptr; 2451 volatile struct snd_pcm_mmap_status *status; 2452 volatile struct snd_pcm_mmap_control *control; 2453 int err; 2454 2455 memset(&sync_ptr, 0, sizeof(sync_ptr)); 2456 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags))) 2457 return -EFAULT; 2458 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control))) 2459 return -EFAULT; 2460 status = runtime->status; 2461 control = runtime->control; 2462 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) { 2463 err = snd_pcm_hwsync(substream); 2464 if (err < 0) 2465 return err; 2466 } 2467 snd_pcm_stream_lock_irq(substream); 2468 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) 2469 control->appl_ptr = sync_ptr.c.control.appl_ptr; 2470 else 2471 sync_ptr.c.control.appl_ptr = control->appl_ptr; 2472 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) 2473 control->avail_min = sync_ptr.c.control.avail_min; 2474 else 2475 sync_ptr.c.control.avail_min = control->avail_min; 2476 sync_ptr.s.status.state = status->state; 2477 sync_ptr.s.status.hw_ptr = status->hw_ptr; 2478 sync_ptr.s.status.tstamp = status->tstamp; 2479 sync_ptr.s.status.suspended_state = status->suspended_state; 2480 snd_pcm_stream_unlock_irq(substream); 2481 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr))) 2482 return -EFAULT; 2483 return 0; 2484 } 2485 2486 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg) 2487 { 2488 struct snd_pcm_runtime *runtime = substream->runtime; 2489 int arg; 2490 2491 if (get_user(arg, _arg)) 2492 return -EFAULT; 2493 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST) 2494 return -EINVAL; 2495 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY; 2496 if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC) 2497 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC; 2498 return 0; 2499 } 2500 2501 static int snd_pcm_common_ioctl1(struct file *file, 2502 struct snd_pcm_substream *substream, 2503 unsigned int cmd, void __user *arg) 2504 { 2505 switch (cmd) { 2506 case SNDRV_PCM_IOCTL_PVERSION: 2507 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0; 2508 case SNDRV_PCM_IOCTL_INFO: 2509 return snd_pcm_info_user(substream, arg); 2510 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */ 2511 return 0; 2512 case SNDRV_PCM_IOCTL_TTSTAMP: 2513 return snd_pcm_tstamp(substream, arg); 2514 case SNDRV_PCM_IOCTL_HW_REFINE: 2515 return snd_pcm_hw_refine_user(substream, arg); 2516 case SNDRV_PCM_IOCTL_HW_PARAMS: 2517 return snd_pcm_hw_params_user(substream, arg); 2518 case SNDRV_PCM_IOCTL_HW_FREE: 2519 return snd_pcm_hw_free(substream); 2520 case SNDRV_PCM_IOCTL_SW_PARAMS: 2521 return snd_pcm_sw_params_user(substream, arg); 2522 case SNDRV_PCM_IOCTL_STATUS: 2523 return snd_pcm_status_user(substream, arg); 2524 case SNDRV_PCM_IOCTL_CHANNEL_INFO: 2525 return snd_pcm_channel_info_user(substream, arg); 2526 case SNDRV_PCM_IOCTL_PREPARE: 2527 return snd_pcm_prepare(substream, file); 2528 case SNDRV_PCM_IOCTL_RESET: 2529 return snd_pcm_reset(substream); 2530 case SNDRV_PCM_IOCTL_START: 2531 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING); 2532 case SNDRV_PCM_IOCTL_LINK: 2533 return snd_pcm_link(substream, (int)(unsigned long) arg); 2534 case SNDRV_PCM_IOCTL_UNLINK: 2535 return snd_pcm_unlink(substream); 2536 case SNDRV_PCM_IOCTL_RESUME: 2537 return snd_pcm_resume(substream); 2538 case SNDRV_PCM_IOCTL_XRUN: 2539 return snd_pcm_xrun(substream); 2540 case SNDRV_PCM_IOCTL_HWSYNC: 2541 return snd_pcm_hwsync(substream); 2542 case SNDRV_PCM_IOCTL_DELAY: 2543 return snd_pcm_delay(substream, arg); 2544 case SNDRV_PCM_IOCTL_SYNC_PTR: 2545 return snd_pcm_sync_ptr(substream, arg); 2546 #ifdef CONFIG_SND_SUPPORT_OLD_API 2547 case SNDRV_PCM_IOCTL_HW_REFINE_OLD: 2548 return snd_pcm_hw_refine_old_user(substream, arg); 2549 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD: 2550 return snd_pcm_hw_params_old_user(substream, arg); 2551 #endif 2552 case SNDRV_PCM_IOCTL_DRAIN: 2553 return snd_pcm_drain(substream, file); 2554 case SNDRV_PCM_IOCTL_DROP: 2555 return snd_pcm_drop(substream); 2556 case SNDRV_PCM_IOCTL_PAUSE: 2557 { 2558 int res; 2559 snd_pcm_stream_lock_irq(substream); 2560 res = snd_pcm_pause(substream, (int)(unsigned long)arg); 2561 snd_pcm_stream_unlock_irq(substream); 2562 return res; 2563 } 2564 } 2565 snd_printd("unknown ioctl = 0x%x\n", cmd); 2566 return -ENOTTY; 2567 } 2568 2569 static int snd_pcm_playback_ioctl1(struct file *file, 2570 struct snd_pcm_substream *substream, 2571 unsigned int cmd, void __user *arg) 2572 { 2573 if (snd_BUG_ON(!substream)) 2574 return -ENXIO; 2575 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) 2576 return -EINVAL; 2577 switch (cmd) { 2578 case SNDRV_PCM_IOCTL_WRITEI_FRAMES: 2579 { 2580 struct snd_xferi xferi; 2581 struct snd_xferi __user *_xferi = arg; 2582 struct snd_pcm_runtime *runtime = substream->runtime; 2583 snd_pcm_sframes_t result; 2584 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2585 return -EBADFD; 2586 if (put_user(0, &_xferi->result)) 2587 return -EFAULT; 2588 if (copy_from_user(&xferi, _xferi, sizeof(xferi))) 2589 return -EFAULT; 2590 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames); 2591 __put_user(result, &_xferi->result); 2592 return result < 0 ? result : 0; 2593 } 2594 case SNDRV_PCM_IOCTL_WRITEN_FRAMES: 2595 { 2596 struct snd_xfern xfern; 2597 struct snd_xfern __user *_xfern = arg; 2598 struct snd_pcm_runtime *runtime = substream->runtime; 2599 void __user **bufs; 2600 snd_pcm_sframes_t result; 2601 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2602 return -EBADFD; 2603 if (runtime->channels > 128) 2604 return -EINVAL; 2605 if (put_user(0, &_xfern->result)) 2606 return -EFAULT; 2607 if (copy_from_user(&xfern, _xfern, sizeof(xfern))) 2608 return -EFAULT; 2609 2610 bufs = memdup_user(xfern.bufs, 2611 sizeof(void *) * runtime->channels); 2612 if (IS_ERR(bufs)) 2613 return PTR_ERR(bufs); 2614 result = snd_pcm_lib_writev(substream, bufs, xfern.frames); 2615 kfree(bufs); 2616 __put_user(result, &_xfern->result); 2617 return result < 0 ? result : 0; 2618 } 2619 case SNDRV_PCM_IOCTL_REWIND: 2620 { 2621 snd_pcm_uframes_t frames; 2622 snd_pcm_uframes_t __user *_frames = arg; 2623 snd_pcm_sframes_t result; 2624 if (get_user(frames, _frames)) 2625 return -EFAULT; 2626 if (put_user(0, _frames)) 2627 return -EFAULT; 2628 result = snd_pcm_playback_rewind(substream, frames); 2629 __put_user(result, _frames); 2630 return result < 0 ? result : 0; 2631 } 2632 case SNDRV_PCM_IOCTL_FORWARD: 2633 { 2634 snd_pcm_uframes_t frames; 2635 snd_pcm_uframes_t __user *_frames = arg; 2636 snd_pcm_sframes_t result; 2637 if (get_user(frames, _frames)) 2638 return -EFAULT; 2639 if (put_user(0, _frames)) 2640 return -EFAULT; 2641 result = snd_pcm_playback_forward(substream, frames); 2642 __put_user(result, _frames); 2643 return result < 0 ? result : 0; 2644 } 2645 } 2646 return snd_pcm_common_ioctl1(file, substream, cmd, arg); 2647 } 2648 2649 static int snd_pcm_capture_ioctl1(struct file *file, 2650 struct snd_pcm_substream *substream, 2651 unsigned int cmd, void __user *arg) 2652 { 2653 if (snd_BUG_ON(!substream)) 2654 return -ENXIO; 2655 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE)) 2656 return -EINVAL; 2657 switch (cmd) { 2658 case SNDRV_PCM_IOCTL_READI_FRAMES: 2659 { 2660 struct snd_xferi xferi; 2661 struct snd_xferi __user *_xferi = arg; 2662 struct snd_pcm_runtime *runtime = substream->runtime; 2663 snd_pcm_sframes_t result; 2664 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2665 return -EBADFD; 2666 if (put_user(0, &_xferi->result)) 2667 return -EFAULT; 2668 if (copy_from_user(&xferi, _xferi, sizeof(xferi))) 2669 return -EFAULT; 2670 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames); 2671 __put_user(result, &_xferi->result); 2672 return result < 0 ? result : 0; 2673 } 2674 case SNDRV_PCM_IOCTL_READN_FRAMES: 2675 { 2676 struct snd_xfern xfern; 2677 struct snd_xfern __user *_xfern = arg; 2678 struct snd_pcm_runtime *runtime = substream->runtime; 2679 void *bufs; 2680 snd_pcm_sframes_t result; 2681 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2682 return -EBADFD; 2683 if (runtime->channels > 128) 2684 return -EINVAL; 2685 if (put_user(0, &_xfern->result)) 2686 return -EFAULT; 2687 if (copy_from_user(&xfern, _xfern, sizeof(xfern))) 2688 return -EFAULT; 2689 2690 bufs = memdup_user(xfern.bufs, 2691 sizeof(void *) * runtime->channels); 2692 if (IS_ERR(bufs)) 2693 return PTR_ERR(bufs); 2694 result = snd_pcm_lib_readv(substream, bufs, xfern.frames); 2695 kfree(bufs); 2696 __put_user(result, &_xfern->result); 2697 return result < 0 ? result : 0; 2698 } 2699 case SNDRV_PCM_IOCTL_REWIND: 2700 { 2701 snd_pcm_uframes_t frames; 2702 snd_pcm_uframes_t __user *_frames = arg; 2703 snd_pcm_sframes_t result; 2704 if (get_user(frames, _frames)) 2705 return -EFAULT; 2706 if (put_user(0, _frames)) 2707 return -EFAULT; 2708 result = snd_pcm_capture_rewind(substream, frames); 2709 __put_user(result, _frames); 2710 return result < 0 ? result : 0; 2711 } 2712 case SNDRV_PCM_IOCTL_FORWARD: 2713 { 2714 snd_pcm_uframes_t frames; 2715 snd_pcm_uframes_t __user *_frames = arg; 2716 snd_pcm_sframes_t result; 2717 if (get_user(frames, _frames)) 2718 return -EFAULT; 2719 if (put_user(0, _frames)) 2720 return -EFAULT; 2721 result = snd_pcm_capture_forward(substream, frames); 2722 __put_user(result, _frames); 2723 return result < 0 ? result : 0; 2724 } 2725 } 2726 return snd_pcm_common_ioctl1(file, substream, cmd, arg); 2727 } 2728 2729 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd, 2730 unsigned long arg) 2731 { 2732 struct snd_pcm_file *pcm_file; 2733 2734 pcm_file = file->private_data; 2735 2736 if (((cmd >> 8) & 0xff) != 'A') 2737 return -ENOTTY; 2738 2739 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd, 2740 (void __user *)arg); 2741 } 2742 2743 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd, 2744 unsigned long arg) 2745 { 2746 struct snd_pcm_file *pcm_file; 2747 2748 pcm_file = file->private_data; 2749 2750 if (((cmd >> 8) & 0xff) != 'A') 2751 return -ENOTTY; 2752 2753 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd, 2754 (void __user *)arg); 2755 } 2756 2757 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, 2758 unsigned int cmd, void *arg) 2759 { 2760 mm_segment_t fs; 2761 int result; 2762 2763 fs = snd_enter_user(); 2764 switch (substream->stream) { 2765 case SNDRV_PCM_STREAM_PLAYBACK: 2766 result = snd_pcm_playback_ioctl1(NULL, substream, cmd, 2767 (void __user *)arg); 2768 break; 2769 case SNDRV_PCM_STREAM_CAPTURE: 2770 result = snd_pcm_capture_ioctl1(NULL, substream, cmd, 2771 (void __user *)arg); 2772 break; 2773 default: 2774 result = -EINVAL; 2775 break; 2776 } 2777 snd_leave_user(fs); 2778 return result; 2779 } 2780 2781 EXPORT_SYMBOL(snd_pcm_kernel_ioctl); 2782 2783 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count, 2784 loff_t * offset) 2785 { 2786 struct snd_pcm_file *pcm_file; 2787 struct snd_pcm_substream *substream; 2788 struct snd_pcm_runtime *runtime; 2789 snd_pcm_sframes_t result; 2790 2791 pcm_file = file->private_data; 2792 substream = pcm_file->substream; 2793 if (PCM_RUNTIME_CHECK(substream)) 2794 return -ENXIO; 2795 runtime = substream->runtime; 2796 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2797 return -EBADFD; 2798 if (!frame_aligned(runtime, count)) 2799 return -EINVAL; 2800 count = bytes_to_frames(runtime, count); 2801 result = snd_pcm_lib_read(substream, buf, count); 2802 if (result > 0) 2803 result = frames_to_bytes(runtime, result); 2804 return result; 2805 } 2806 2807 static ssize_t snd_pcm_write(struct file *file, const char __user *buf, 2808 size_t count, loff_t * offset) 2809 { 2810 struct snd_pcm_file *pcm_file; 2811 struct snd_pcm_substream *substream; 2812 struct snd_pcm_runtime *runtime; 2813 snd_pcm_sframes_t result; 2814 2815 pcm_file = file->private_data; 2816 substream = pcm_file->substream; 2817 if (PCM_RUNTIME_CHECK(substream)) 2818 return -ENXIO; 2819 runtime = substream->runtime; 2820 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2821 return -EBADFD; 2822 if (!frame_aligned(runtime, count)) 2823 return -EINVAL; 2824 count = bytes_to_frames(runtime, count); 2825 result = snd_pcm_lib_write(substream, buf, count); 2826 if (result > 0) 2827 result = frames_to_bytes(runtime, result); 2828 return result; 2829 } 2830 2831 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov, 2832 unsigned long nr_segs, loff_t pos) 2833 2834 { 2835 struct snd_pcm_file *pcm_file; 2836 struct snd_pcm_substream *substream; 2837 struct snd_pcm_runtime *runtime; 2838 snd_pcm_sframes_t result; 2839 unsigned long i; 2840 void __user **bufs; 2841 snd_pcm_uframes_t frames; 2842 2843 pcm_file = iocb->ki_filp->private_data; 2844 substream = pcm_file->substream; 2845 if (PCM_RUNTIME_CHECK(substream)) 2846 return -ENXIO; 2847 runtime = substream->runtime; 2848 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2849 return -EBADFD; 2850 if (nr_segs > 1024 || nr_segs != runtime->channels) 2851 return -EINVAL; 2852 if (!frame_aligned(runtime, iov->iov_len)) 2853 return -EINVAL; 2854 frames = bytes_to_samples(runtime, iov->iov_len); 2855 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL); 2856 if (bufs == NULL) 2857 return -ENOMEM; 2858 for (i = 0; i < nr_segs; ++i) 2859 bufs[i] = iov[i].iov_base; 2860 result = snd_pcm_lib_readv(substream, bufs, frames); 2861 if (result > 0) 2862 result = frames_to_bytes(runtime, result); 2863 kfree(bufs); 2864 return result; 2865 } 2866 2867 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov, 2868 unsigned long nr_segs, loff_t pos) 2869 { 2870 struct snd_pcm_file *pcm_file; 2871 struct snd_pcm_substream *substream; 2872 struct snd_pcm_runtime *runtime; 2873 snd_pcm_sframes_t result; 2874 unsigned long i; 2875 void __user **bufs; 2876 snd_pcm_uframes_t frames; 2877 2878 pcm_file = iocb->ki_filp->private_data; 2879 substream = pcm_file->substream; 2880 if (PCM_RUNTIME_CHECK(substream)) 2881 return -ENXIO; 2882 runtime = substream->runtime; 2883 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2884 return -EBADFD; 2885 if (nr_segs > 128 || nr_segs != runtime->channels || 2886 !frame_aligned(runtime, iov->iov_len)) 2887 return -EINVAL; 2888 frames = bytes_to_samples(runtime, iov->iov_len); 2889 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL); 2890 if (bufs == NULL) 2891 return -ENOMEM; 2892 for (i = 0; i < nr_segs; ++i) 2893 bufs[i] = iov[i].iov_base; 2894 result = snd_pcm_lib_writev(substream, bufs, frames); 2895 if (result > 0) 2896 result = frames_to_bytes(runtime, result); 2897 kfree(bufs); 2898 return result; 2899 } 2900 2901 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait) 2902 { 2903 struct snd_pcm_file *pcm_file; 2904 struct snd_pcm_substream *substream; 2905 struct snd_pcm_runtime *runtime; 2906 unsigned int mask; 2907 snd_pcm_uframes_t avail; 2908 2909 pcm_file = file->private_data; 2910 2911 substream = pcm_file->substream; 2912 if (PCM_RUNTIME_CHECK(substream)) 2913 return -ENXIO; 2914 runtime = substream->runtime; 2915 2916 poll_wait(file, &runtime->sleep, wait); 2917 2918 snd_pcm_stream_lock_irq(substream); 2919 avail = snd_pcm_playback_avail(runtime); 2920 switch (runtime->status->state) { 2921 case SNDRV_PCM_STATE_RUNNING: 2922 case SNDRV_PCM_STATE_PREPARED: 2923 case SNDRV_PCM_STATE_PAUSED: 2924 if (avail >= runtime->control->avail_min) { 2925 mask = POLLOUT | POLLWRNORM; 2926 break; 2927 } 2928 /* Fall through */ 2929 case SNDRV_PCM_STATE_DRAINING: 2930 mask = 0; 2931 break; 2932 default: 2933 mask = POLLOUT | POLLWRNORM | POLLERR; 2934 break; 2935 } 2936 snd_pcm_stream_unlock_irq(substream); 2937 return mask; 2938 } 2939 2940 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait) 2941 { 2942 struct snd_pcm_file *pcm_file; 2943 struct snd_pcm_substream *substream; 2944 struct snd_pcm_runtime *runtime; 2945 unsigned int mask; 2946 snd_pcm_uframes_t avail; 2947 2948 pcm_file = file->private_data; 2949 2950 substream = pcm_file->substream; 2951 if (PCM_RUNTIME_CHECK(substream)) 2952 return -ENXIO; 2953 runtime = substream->runtime; 2954 2955 poll_wait(file, &runtime->sleep, wait); 2956 2957 snd_pcm_stream_lock_irq(substream); 2958 avail = snd_pcm_capture_avail(runtime); 2959 switch (runtime->status->state) { 2960 case SNDRV_PCM_STATE_RUNNING: 2961 case SNDRV_PCM_STATE_PREPARED: 2962 case SNDRV_PCM_STATE_PAUSED: 2963 if (avail >= runtime->control->avail_min) { 2964 mask = POLLIN | POLLRDNORM; 2965 break; 2966 } 2967 mask = 0; 2968 break; 2969 case SNDRV_PCM_STATE_DRAINING: 2970 if (avail > 0) { 2971 mask = POLLIN | POLLRDNORM; 2972 break; 2973 } 2974 /* Fall through */ 2975 default: 2976 mask = POLLIN | POLLRDNORM | POLLERR; 2977 break; 2978 } 2979 snd_pcm_stream_unlock_irq(substream); 2980 return mask; 2981 } 2982 2983 /* 2984 * mmap support 2985 */ 2986 2987 /* 2988 * Only on coherent architectures, we can mmap the status and the control records 2989 * for effcient data transfer. On others, we have to use HWSYNC ioctl... 2990 */ 2991 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) 2992 /* 2993 * mmap status record 2994 */ 2995 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area, 2996 struct vm_fault *vmf) 2997 { 2998 struct snd_pcm_substream *substream = area->vm_private_data; 2999 struct snd_pcm_runtime *runtime; 3000 3001 if (substream == NULL) 3002 return VM_FAULT_SIGBUS; 3003 runtime = substream->runtime; 3004 vmf->page = virt_to_page(runtime->status); 3005 get_page(vmf->page); 3006 return 0; 3007 } 3008 3009 static const struct vm_operations_struct snd_pcm_vm_ops_status = 3010 { 3011 .fault = snd_pcm_mmap_status_fault, 3012 }; 3013 3014 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, 3015 struct vm_area_struct *area) 3016 { 3017 long size; 3018 if (!(area->vm_flags & VM_READ)) 3019 return -EINVAL; 3020 size = area->vm_end - area->vm_start; 3021 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))) 3022 return -EINVAL; 3023 area->vm_ops = &snd_pcm_vm_ops_status; 3024 area->vm_private_data = substream; 3025 area->vm_flags |= VM_RESERVED; 3026 return 0; 3027 } 3028 3029 /* 3030 * mmap control record 3031 */ 3032 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area, 3033 struct vm_fault *vmf) 3034 { 3035 struct snd_pcm_substream *substream = area->vm_private_data; 3036 struct snd_pcm_runtime *runtime; 3037 3038 if (substream == NULL) 3039 return VM_FAULT_SIGBUS; 3040 runtime = substream->runtime; 3041 vmf->page = virt_to_page(runtime->control); 3042 get_page(vmf->page); 3043 return 0; 3044 } 3045 3046 static const struct vm_operations_struct snd_pcm_vm_ops_control = 3047 { 3048 .fault = snd_pcm_mmap_control_fault, 3049 }; 3050 3051 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, 3052 struct vm_area_struct *area) 3053 { 3054 long size; 3055 if (!(area->vm_flags & VM_READ)) 3056 return -EINVAL; 3057 size = area->vm_end - area->vm_start; 3058 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))) 3059 return -EINVAL; 3060 area->vm_ops = &snd_pcm_vm_ops_control; 3061 area->vm_private_data = substream; 3062 area->vm_flags |= VM_RESERVED; 3063 return 0; 3064 } 3065 #else /* ! coherent mmap */ 3066 /* 3067 * don't support mmap for status and control records. 3068 */ 3069 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, 3070 struct vm_area_struct *area) 3071 { 3072 return -ENXIO; 3073 } 3074 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, 3075 struct vm_area_struct *area) 3076 { 3077 return -ENXIO; 3078 } 3079 #endif /* coherent mmap */ 3080 3081 static inline struct page * 3082 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs) 3083 { 3084 void *vaddr = substream->runtime->dma_area + ofs; 3085 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT) 3086 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) 3087 return virt_to_page(CAC_ADDR(vaddr)); 3088 #endif 3089 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE) 3090 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) { 3091 dma_addr_t addr = substream->runtime->dma_addr + ofs; 3092 addr -= get_dma_offset(substream->dma_buffer.dev.dev); 3093 /* assume dma_handle set via pfn_to_phys() in 3094 * mm/dma-noncoherent.c 3095 */ 3096 return pfn_to_page(addr >> PAGE_SHIFT); 3097 } 3098 #endif 3099 return virt_to_page(vaddr); 3100 } 3101 3102 /* 3103 * fault callback for mmapping a RAM page 3104 */ 3105 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area, 3106 struct vm_fault *vmf) 3107 { 3108 struct snd_pcm_substream *substream = area->vm_private_data; 3109 struct snd_pcm_runtime *runtime; 3110 unsigned long offset; 3111 struct page * page; 3112 size_t dma_bytes; 3113 3114 if (substream == NULL) 3115 return VM_FAULT_SIGBUS; 3116 runtime = substream->runtime; 3117 offset = vmf->pgoff << PAGE_SHIFT; 3118 dma_bytes = PAGE_ALIGN(runtime->dma_bytes); 3119 if (offset > dma_bytes - PAGE_SIZE) 3120 return VM_FAULT_SIGBUS; 3121 if (substream->ops->page) 3122 page = substream->ops->page(substream, offset); 3123 else 3124 page = snd_pcm_default_page_ops(substream, offset); 3125 if (!page) 3126 return VM_FAULT_SIGBUS; 3127 get_page(page); 3128 vmf->page = page; 3129 return 0; 3130 } 3131 3132 static const struct vm_operations_struct snd_pcm_vm_ops_data = { 3133 .open = snd_pcm_mmap_data_open, 3134 .close = snd_pcm_mmap_data_close, 3135 }; 3136 3137 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = { 3138 .open = snd_pcm_mmap_data_open, 3139 .close = snd_pcm_mmap_data_close, 3140 .fault = snd_pcm_mmap_data_fault, 3141 }; 3142 3143 #ifndef ARCH_HAS_DMA_MMAP_COHERENT 3144 /* This should be defined / handled globally! */ 3145 #ifdef CONFIG_ARM 3146 #define ARCH_HAS_DMA_MMAP_COHERENT 3147 #endif 3148 #endif 3149 3150 /* 3151 * mmap the DMA buffer on RAM 3152 */ 3153 static int snd_pcm_default_mmap(struct snd_pcm_substream *substream, 3154 struct vm_area_struct *area) 3155 { 3156 area->vm_flags |= VM_RESERVED; 3157 #ifdef ARCH_HAS_DMA_MMAP_COHERENT 3158 if (!substream->ops->page && 3159 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) 3160 return dma_mmap_coherent(substream->dma_buffer.dev.dev, 3161 area, 3162 substream->runtime->dma_area, 3163 substream->runtime->dma_addr, 3164 area->vm_end - area->vm_start); 3165 #elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT) 3166 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV && 3167 !plat_device_is_coherent(substream->dma_buffer.dev.dev)) 3168 area->vm_page_prot = pgprot_noncached(area->vm_page_prot); 3169 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */ 3170 /* mmap with fault handler */ 3171 area->vm_ops = &snd_pcm_vm_ops_data_fault; 3172 return 0; 3173 } 3174 3175 /* 3176 * mmap the DMA buffer on I/O memory area 3177 */ 3178 #if SNDRV_PCM_INFO_MMAP_IOMEM 3179 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, 3180 struct vm_area_struct *area) 3181 { 3182 long size; 3183 unsigned long offset; 3184 3185 area->vm_page_prot = pgprot_noncached(area->vm_page_prot); 3186 area->vm_flags |= VM_IO; 3187 size = area->vm_end - area->vm_start; 3188 offset = area->vm_pgoff << PAGE_SHIFT; 3189 if (io_remap_pfn_range(area, area->vm_start, 3190 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT, 3191 size, area->vm_page_prot)) 3192 return -EAGAIN; 3193 return 0; 3194 } 3195 3196 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem); 3197 #endif /* SNDRV_PCM_INFO_MMAP */ 3198 3199 /* 3200 * mmap DMA buffer 3201 */ 3202 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, 3203 struct vm_area_struct *area) 3204 { 3205 struct snd_pcm_runtime *runtime; 3206 long size; 3207 unsigned long offset; 3208 size_t dma_bytes; 3209 int err; 3210 3211 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 3212 if (!(area->vm_flags & (VM_WRITE|VM_READ))) 3213 return -EINVAL; 3214 } else { 3215 if (!(area->vm_flags & VM_READ)) 3216 return -EINVAL; 3217 } 3218 runtime = substream->runtime; 3219 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 3220 return -EBADFD; 3221 if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) 3222 return -ENXIO; 3223 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || 3224 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) 3225 return -EINVAL; 3226 size = area->vm_end - area->vm_start; 3227 offset = area->vm_pgoff << PAGE_SHIFT; 3228 dma_bytes = PAGE_ALIGN(runtime->dma_bytes); 3229 if ((size_t)size > dma_bytes) 3230 return -EINVAL; 3231 if (offset > dma_bytes - size) 3232 return -EINVAL; 3233 3234 area->vm_ops = &snd_pcm_vm_ops_data; 3235 area->vm_private_data = substream; 3236 if (substream->ops->mmap) 3237 err = substream->ops->mmap(substream, area); 3238 else 3239 err = snd_pcm_default_mmap(substream, area); 3240 if (!err) 3241 atomic_inc(&substream->mmap_count); 3242 return err; 3243 } 3244 3245 EXPORT_SYMBOL(snd_pcm_mmap_data); 3246 3247 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area) 3248 { 3249 struct snd_pcm_file * pcm_file; 3250 struct snd_pcm_substream *substream; 3251 unsigned long offset; 3252 3253 pcm_file = file->private_data; 3254 substream = pcm_file->substream; 3255 if (PCM_RUNTIME_CHECK(substream)) 3256 return -ENXIO; 3257 3258 offset = area->vm_pgoff << PAGE_SHIFT; 3259 switch (offset) { 3260 case SNDRV_PCM_MMAP_OFFSET_STATUS: 3261 if (pcm_file->no_compat_mmap) 3262 return -ENXIO; 3263 return snd_pcm_mmap_status(substream, file, area); 3264 case SNDRV_PCM_MMAP_OFFSET_CONTROL: 3265 if (pcm_file->no_compat_mmap) 3266 return -ENXIO; 3267 return snd_pcm_mmap_control(substream, file, area); 3268 default: 3269 return snd_pcm_mmap_data(substream, file, area); 3270 } 3271 return 0; 3272 } 3273 3274 static int snd_pcm_fasync(int fd, struct file * file, int on) 3275 { 3276 struct snd_pcm_file * pcm_file; 3277 struct snd_pcm_substream *substream; 3278 struct snd_pcm_runtime *runtime; 3279 3280 pcm_file = file->private_data; 3281 substream = pcm_file->substream; 3282 if (PCM_RUNTIME_CHECK(substream)) 3283 return -ENXIO; 3284 runtime = substream->runtime; 3285 return fasync_helper(fd, file, on, &runtime->fasync); 3286 } 3287 3288 /* 3289 * ioctl32 compat 3290 */ 3291 #ifdef CONFIG_COMPAT 3292 #include "pcm_compat.c" 3293 #else 3294 #define snd_pcm_ioctl_compat NULL 3295 #endif 3296 3297 /* 3298 * To be removed helpers to keep binary compatibility 3299 */ 3300 3301 #ifdef CONFIG_SND_SUPPORT_OLD_API 3302 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5)) 3303 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5)) 3304 3305 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params, 3306 struct snd_pcm_hw_params_old *oparams) 3307 { 3308 unsigned int i; 3309 3310 memset(params, 0, sizeof(*params)); 3311 params->flags = oparams->flags; 3312 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) 3313 params->masks[i].bits[0] = oparams->masks[i]; 3314 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals)); 3315 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask); 3316 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask); 3317 params->info = oparams->info; 3318 params->msbits = oparams->msbits; 3319 params->rate_num = oparams->rate_num; 3320 params->rate_den = oparams->rate_den; 3321 params->fifo_size = oparams->fifo_size; 3322 } 3323 3324 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams, 3325 struct snd_pcm_hw_params *params) 3326 { 3327 unsigned int i; 3328 3329 memset(oparams, 0, sizeof(*oparams)); 3330 oparams->flags = params->flags; 3331 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) 3332 oparams->masks[i] = params->masks[i].bits[0]; 3333 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals)); 3334 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask); 3335 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask); 3336 oparams->info = params->info; 3337 oparams->msbits = params->msbits; 3338 oparams->rate_num = params->rate_num; 3339 oparams->rate_den = params->rate_den; 3340 oparams->fifo_size = params->fifo_size; 3341 } 3342 3343 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, 3344 struct snd_pcm_hw_params_old __user * _oparams) 3345 { 3346 struct snd_pcm_hw_params *params; 3347 struct snd_pcm_hw_params_old *oparams = NULL; 3348 int err; 3349 3350 params = kmalloc(sizeof(*params), GFP_KERNEL); 3351 if (!params) 3352 return -ENOMEM; 3353 3354 oparams = memdup_user(_oparams, sizeof(*oparams)); 3355 if (IS_ERR(oparams)) { 3356 err = PTR_ERR(oparams); 3357 goto out; 3358 } 3359 snd_pcm_hw_convert_from_old_params(params, oparams); 3360 err = snd_pcm_hw_refine(substream, params); 3361 snd_pcm_hw_convert_to_old_params(oparams, params); 3362 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { 3363 if (!err) 3364 err = -EFAULT; 3365 } 3366 3367 kfree(oparams); 3368 out: 3369 kfree(params); 3370 return err; 3371 } 3372 3373 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, 3374 struct snd_pcm_hw_params_old __user * _oparams) 3375 { 3376 struct snd_pcm_hw_params *params; 3377 struct snd_pcm_hw_params_old *oparams = NULL; 3378 int err; 3379 3380 params = kmalloc(sizeof(*params), GFP_KERNEL); 3381 if (!params) 3382 return -ENOMEM; 3383 3384 oparams = memdup_user(_oparams, sizeof(*oparams)); 3385 if (IS_ERR(oparams)) { 3386 err = PTR_ERR(oparams); 3387 goto out; 3388 } 3389 snd_pcm_hw_convert_from_old_params(params, oparams); 3390 err = snd_pcm_hw_params(substream, params); 3391 snd_pcm_hw_convert_to_old_params(oparams, params); 3392 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { 3393 if (!err) 3394 err = -EFAULT; 3395 } 3396 3397 kfree(oparams); 3398 out: 3399 kfree(params); 3400 return err; 3401 } 3402 #endif /* CONFIG_SND_SUPPORT_OLD_API */ 3403 3404 #ifndef CONFIG_MMU 3405 static unsigned long snd_pcm_get_unmapped_area(struct file *file, 3406 unsigned long addr, 3407 unsigned long len, 3408 unsigned long pgoff, 3409 unsigned long flags) 3410 { 3411 struct snd_pcm_file *pcm_file = file->private_data; 3412 struct snd_pcm_substream *substream = pcm_file->substream; 3413 struct snd_pcm_runtime *runtime = substream->runtime; 3414 unsigned long offset = pgoff << PAGE_SHIFT; 3415 3416 switch (offset) { 3417 case SNDRV_PCM_MMAP_OFFSET_STATUS: 3418 return (unsigned long)runtime->status; 3419 case SNDRV_PCM_MMAP_OFFSET_CONTROL: 3420 return (unsigned long)runtime->control; 3421 default: 3422 return (unsigned long)runtime->dma_area + offset; 3423 } 3424 } 3425 #else 3426 # define snd_pcm_get_unmapped_area NULL 3427 #endif 3428 3429 /* 3430 * Register section 3431 */ 3432 3433 const struct file_operations snd_pcm_f_ops[2] = { 3434 { 3435 .owner = THIS_MODULE, 3436 .write = snd_pcm_write, 3437 .aio_write = snd_pcm_aio_write, 3438 .open = snd_pcm_playback_open, 3439 .release = snd_pcm_release, 3440 .llseek = no_llseek, 3441 .poll = snd_pcm_playback_poll, 3442 .unlocked_ioctl = snd_pcm_playback_ioctl, 3443 .compat_ioctl = snd_pcm_ioctl_compat, 3444 .mmap = snd_pcm_mmap, 3445 .fasync = snd_pcm_fasync, 3446 .get_unmapped_area = snd_pcm_get_unmapped_area, 3447 }, 3448 { 3449 .owner = THIS_MODULE, 3450 .read = snd_pcm_read, 3451 .aio_read = snd_pcm_aio_read, 3452 .open = snd_pcm_capture_open, 3453 .release = snd_pcm_release, 3454 .llseek = no_llseek, 3455 .poll = snd_pcm_capture_poll, 3456 .unlocked_ioctl = snd_pcm_capture_ioctl, 3457 .compat_ioctl = snd_pcm_ioctl_compat, 3458 .mmap = snd_pcm_mmap, 3459 .fasync = snd_pcm_fasync, 3460 .get_unmapped_area = snd_pcm_get_unmapped_area, 3461 } 3462 }; 3463