1 /* 2 * Digital Audio (PCM) abstract layer 3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 4 * 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 * 20 */ 21 22 #include <linux/mm.h> 23 #include <linux/module.h> 24 #include <linux/file.h> 25 #include <linux/slab.h> 26 #include <linux/time.h> 27 #include <linux/pm_qos.h> 28 #include <linux/uio.h> 29 #include <linux/dma-mapping.h> 30 #include <sound/core.h> 31 #include <sound/control.h> 32 #include <sound/info.h> 33 #include <sound/pcm.h> 34 #include <sound/pcm_params.h> 35 #include <sound/timer.h> 36 #include <sound/minors.h> 37 #include <asm/io.h> 38 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT) 39 #include <dma-coherence.h> 40 #endif 41 42 /* 43 * Compatibility 44 */ 45 46 struct snd_pcm_hw_params_old { 47 unsigned int flags; 48 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT - 49 SNDRV_PCM_HW_PARAM_ACCESS + 1]; 50 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME - 51 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1]; 52 unsigned int rmask; 53 unsigned int cmask; 54 unsigned int info; 55 unsigned int msbits; 56 unsigned int rate_num; 57 unsigned int rate_den; 58 snd_pcm_uframes_t fifo_size; 59 unsigned char reserved[64]; 60 }; 61 62 #ifdef CONFIG_SND_SUPPORT_OLD_API 63 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old) 64 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old) 65 66 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, 67 struct snd_pcm_hw_params_old __user * _oparams); 68 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, 69 struct snd_pcm_hw_params_old __user * _oparams); 70 #endif 71 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream); 72 73 /* 74 * 75 */ 76 77 DEFINE_RWLOCK(snd_pcm_link_rwlock); 78 EXPORT_SYMBOL(snd_pcm_link_rwlock); 79 80 static DECLARE_RWSEM(snd_pcm_link_rwsem); 81 82 static inline mm_segment_t snd_enter_user(void) 83 { 84 mm_segment_t fs = get_fs(); 85 set_fs(get_ds()); 86 return fs; 87 } 88 89 static inline void snd_leave_user(mm_segment_t fs) 90 { 91 set_fs(fs); 92 } 93 94 95 96 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info) 97 { 98 struct snd_pcm_runtime *runtime; 99 struct snd_pcm *pcm = substream->pcm; 100 struct snd_pcm_str *pstr = substream->pstr; 101 102 memset(info, 0, sizeof(*info)); 103 info->card = pcm->card->number; 104 info->device = pcm->device; 105 info->stream = substream->stream; 106 info->subdevice = substream->number; 107 strlcpy(info->id, pcm->id, sizeof(info->id)); 108 strlcpy(info->name, pcm->name, sizeof(info->name)); 109 info->dev_class = pcm->dev_class; 110 info->dev_subclass = pcm->dev_subclass; 111 info->subdevices_count = pstr->substream_count; 112 info->subdevices_avail = pstr->substream_count - pstr->substream_opened; 113 strlcpy(info->subname, substream->name, sizeof(info->subname)); 114 runtime = substream->runtime; 115 /* AB: FIXME!!! This is definitely nonsense */ 116 if (runtime) { 117 info->sync = runtime->sync; 118 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info); 119 } 120 return 0; 121 } 122 123 int snd_pcm_info_user(struct snd_pcm_substream *substream, 124 struct snd_pcm_info __user * _info) 125 { 126 struct snd_pcm_info *info; 127 int err; 128 129 info = kmalloc(sizeof(*info), GFP_KERNEL); 130 if (! info) 131 return -ENOMEM; 132 err = snd_pcm_info(substream, info); 133 if (err >= 0) { 134 if (copy_to_user(_info, info, sizeof(*info))) 135 err = -EFAULT; 136 } 137 kfree(info); 138 return err; 139 } 140 141 #undef RULES_DEBUG 142 143 #ifdef RULES_DEBUG 144 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v 145 static const char * const snd_pcm_hw_param_names[] = { 146 HW_PARAM(ACCESS), 147 HW_PARAM(FORMAT), 148 HW_PARAM(SUBFORMAT), 149 HW_PARAM(SAMPLE_BITS), 150 HW_PARAM(FRAME_BITS), 151 HW_PARAM(CHANNELS), 152 HW_PARAM(RATE), 153 HW_PARAM(PERIOD_TIME), 154 HW_PARAM(PERIOD_SIZE), 155 HW_PARAM(PERIOD_BYTES), 156 HW_PARAM(PERIODS), 157 HW_PARAM(BUFFER_TIME), 158 HW_PARAM(BUFFER_SIZE), 159 HW_PARAM(BUFFER_BYTES), 160 HW_PARAM(TICK_TIME), 161 }; 162 #endif 163 164 int snd_pcm_hw_refine(struct snd_pcm_substream *substream, 165 struct snd_pcm_hw_params *params) 166 { 167 unsigned int k; 168 struct snd_pcm_hardware *hw; 169 struct snd_interval *i = NULL; 170 struct snd_mask *m = NULL; 171 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints; 172 unsigned int rstamps[constrs->rules_num]; 173 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1]; 174 unsigned int stamp = 2; 175 int changed, again; 176 177 params->info = 0; 178 params->fifo_size = 0; 179 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS)) 180 params->msbits = 0; 181 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) { 182 params->rate_num = 0; 183 params->rate_den = 0; 184 } 185 186 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { 187 m = hw_param_mask(params, k); 188 if (snd_mask_empty(m)) 189 return -EINVAL; 190 if (!(params->rmask & (1 << k))) 191 continue; 192 #ifdef RULES_DEBUG 193 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]); 194 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); 195 #endif 196 changed = snd_mask_refine(m, constrs_mask(constrs, k)); 197 #ifdef RULES_DEBUG 198 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); 199 #endif 200 if (changed) 201 params->cmask |= 1 << k; 202 if (changed < 0) 203 return changed; 204 } 205 206 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { 207 i = hw_param_interval(params, k); 208 if (snd_interval_empty(i)) 209 return -EINVAL; 210 if (!(params->rmask & (1 << k))) 211 continue; 212 #ifdef RULES_DEBUG 213 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]); 214 if (i->empty) 215 printk("empty"); 216 else 217 printk("%c%u %u%c", 218 i->openmin ? '(' : '[', i->min, 219 i->max, i->openmax ? ')' : ']'); 220 printk(" -> "); 221 #endif 222 changed = snd_interval_refine(i, constrs_interval(constrs, k)); 223 #ifdef RULES_DEBUG 224 if (i->empty) 225 printk("empty\n"); 226 else 227 printk("%c%u %u%c\n", 228 i->openmin ? '(' : '[', i->min, 229 i->max, i->openmax ? ')' : ']'); 230 #endif 231 if (changed) 232 params->cmask |= 1 << k; 233 if (changed < 0) 234 return changed; 235 } 236 237 for (k = 0; k < constrs->rules_num; k++) 238 rstamps[k] = 0; 239 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) 240 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0; 241 do { 242 again = 0; 243 for (k = 0; k < constrs->rules_num; k++) { 244 struct snd_pcm_hw_rule *r = &constrs->rules[k]; 245 unsigned int d; 246 int doit = 0; 247 if (r->cond && !(r->cond & params->flags)) 248 continue; 249 for (d = 0; r->deps[d] >= 0; d++) { 250 if (vstamps[r->deps[d]] > rstamps[k]) { 251 doit = 1; 252 break; 253 } 254 } 255 if (!doit) 256 continue; 257 #ifdef RULES_DEBUG 258 printk(KERN_DEBUG "Rule %d [%p]: ", k, r->func); 259 if (r->var >= 0) { 260 printk("%s = ", snd_pcm_hw_param_names[r->var]); 261 if (hw_is_mask(r->var)) { 262 m = hw_param_mask(params, r->var); 263 printk("%x", *m->bits); 264 } else { 265 i = hw_param_interval(params, r->var); 266 if (i->empty) 267 printk("empty"); 268 else 269 printk("%c%u %u%c", 270 i->openmin ? '(' : '[', i->min, 271 i->max, i->openmax ? ')' : ']'); 272 } 273 } 274 #endif 275 changed = r->func(params, r); 276 #ifdef RULES_DEBUG 277 if (r->var >= 0) { 278 printk(" -> "); 279 if (hw_is_mask(r->var)) 280 printk("%x", *m->bits); 281 else { 282 if (i->empty) 283 printk("empty"); 284 else 285 printk("%c%u %u%c", 286 i->openmin ? '(' : '[', i->min, 287 i->max, i->openmax ? ')' : ']'); 288 } 289 } 290 printk("\n"); 291 #endif 292 rstamps[k] = stamp; 293 if (changed && r->var >= 0) { 294 params->cmask |= (1 << r->var); 295 vstamps[r->var] = stamp; 296 again = 1; 297 } 298 if (changed < 0) 299 return changed; 300 stamp++; 301 } 302 } while (again); 303 if (!params->msbits) { 304 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); 305 if (snd_interval_single(i)) 306 params->msbits = snd_interval_value(i); 307 } 308 309 if (!params->rate_den) { 310 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); 311 if (snd_interval_single(i)) { 312 params->rate_num = snd_interval_value(i); 313 params->rate_den = 1; 314 } 315 } 316 317 hw = &substream->runtime->hw; 318 if (!params->info) 319 params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES; 320 if (!params->fifo_size) { 321 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 322 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 323 if (snd_mask_min(m) == snd_mask_max(m) && 324 snd_interval_min(i) == snd_interval_max(i)) { 325 changed = substream->ops->ioctl(substream, 326 SNDRV_PCM_IOCTL1_FIFO_SIZE, params); 327 if (changed < 0) 328 return changed; 329 } 330 } 331 params->rmask = 0; 332 return 0; 333 } 334 335 EXPORT_SYMBOL(snd_pcm_hw_refine); 336 337 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream, 338 struct snd_pcm_hw_params __user * _params) 339 { 340 struct snd_pcm_hw_params *params; 341 int err; 342 343 params = memdup_user(_params, sizeof(*params)); 344 if (IS_ERR(params)) 345 return PTR_ERR(params); 346 347 err = snd_pcm_hw_refine(substream, params); 348 if (copy_to_user(_params, params, sizeof(*params))) { 349 if (!err) 350 err = -EFAULT; 351 } 352 353 kfree(params); 354 return err; 355 } 356 357 static int period_to_usecs(struct snd_pcm_runtime *runtime) 358 { 359 int usecs; 360 361 if (! runtime->rate) 362 return -1; /* invalid */ 363 364 /* take 75% of period time as the deadline */ 365 usecs = (750000 / runtime->rate) * runtime->period_size; 366 usecs += ((750000 % runtime->rate) * runtime->period_size) / 367 runtime->rate; 368 369 return usecs; 370 } 371 372 static int snd_pcm_hw_params(struct snd_pcm_substream *substream, 373 struct snd_pcm_hw_params *params) 374 { 375 struct snd_pcm_runtime *runtime; 376 int err, usecs; 377 unsigned int bits; 378 snd_pcm_uframes_t frames; 379 380 if (PCM_RUNTIME_CHECK(substream)) 381 return -ENXIO; 382 runtime = substream->runtime; 383 snd_pcm_stream_lock_irq(substream); 384 switch (runtime->status->state) { 385 case SNDRV_PCM_STATE_OPEN: 386 case SNDRV_PCM_STATE_SETUP: 387 case SNDRV_PCM_STATE_PREPARED: 388 break; 389 default: 390 snd_pcm_stream_unlock_irq(substream); 391 return -EBADFD; 392 } 393 snd_pcm_stream_unlock_irq(substream); 394 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 395 if (!substream->oss.oss) 396 #endif 397 if (atomic_read(&substream->mmap_count)) 398 return -EBADFD; 399 400 params->rmask = ~0U; 401 err = snd_pcm_hw_refine(substream, params); 402 if (err < 0) 403 goto _error; 404 405 err = snd_pcm_hw_params_choose(substream, params); 406 if (err < 0) 407 goto _error; 408 409 if (substream->ops->hw_params != NULL) { 410 err = substream->ops->hw_params(substream, params); 411 if (err < 0) 412 goto _error; 413 } 414 415 runtime->access = params_access(params); 416 runtime->format = params_format(params); 417 runtime->subformat = params_subformat(params); 418 runtime->channels = params_channels(params); 419 runtime->rate = params_rate(params); 420 runtime->period_size = params_period_size(params); 421 runtime->periods = params_periods(params); 422 runtime->buffer_size = params_buffer_size(params); 423 runtime->info = params->info; 424 runtime->rate_num = params->rate_num; 425 runtime->rate_den = params->rate_den; 426 runtime->no_period_wakeup = 427 (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) && 428 (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP); 429 430 bits = snd_pcm_format_physical_width(runtime->format); 431 runtime->sample_bits = bits; 432 bits *= runtime->channels; 433 runtime->frame_bits = bits; 434 frames = 1; 435 while (bits % 8 != 0) { 436 bits *= 2; 437 frames *= 2; 438 } 439 runtime->byte_align = bits / 8; 440 runtime->min_align = frames; 441 442 /* Default sw params */ 443 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; 444 runtime->period_step = 1; 445 runtime->control->avail_min = runtime->period_size; 446 runtime->start_threshold = 1; 447 runtime->stop_threshold = runtime->buffer_size; 448 runtime->silence_threshold = 0; 449 runtime->silence_size = 0; 450 runtime->boundary = runtime->buffer_size; 451 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size) 452 runtime->boundary *= 2; 453 454 snd_pcm_timer_resolution_change(substream); 455 runtime->status->state = SNDRV_PCM_STATE_SETUP; 456 457 if (pm_qos_request_active(&substream->latency_pm_qos_req)) 458 pm_qos_remove_request(&substream->latency_pm_qos_req); 459 if ((usecs = period_to_usecs(runtime)) >= 0) 460 pm_qos_add_request(&substream->latency_pm_qos_req, 461 PM_QOS_CPU_DMA_LATENCY, usecs); 462 return 0; 463 _error: 464 /* hardware might be unusable from this time, 465 so we force application to retry to set 466 the correct hardware parameter settings */ 467 runtime->status->state = SNDRV_PCM_STATE_OPEN; 468 if (substream->ops->hw_free != NULL) 469 substream->ops->hw_free(substream); 470 return err; 471 } 472 473 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream, 474 struct snd_pcm_hw_params __user * _params) 475 { 476 struct snd_pcm_hw_params *params; 477 int err; 478 479 params = memdup_user(_params, sizeof(*params)); 480 if (IS_ERR(params)) 481 return PTR_ERR(params); 482 483 err = snd_pcm_hw_params(substream, params); 484 if (copy_to_user(_params, params, sizeof(*params))) { 485 if (!err) 486 err = -EFAULT; 487 } 488 489 kfree(params); 490 return err; 491 } 492 493 static int snd_pcm_hw_free(struct snd_pcm_substream *substream) 494 { 495 struct snd_pcm_runtime *runtime; 496 int result = 0; 497 498 if (PCM_RUNTIME_CHECK(substream)) 499 return -ENXIO; 500 runtime = substream->runtime; 501 snd_pcm_stream_lock_irq(substream); 502 switch (runtime->status->state) { 503 case SNDRV_PCM_STATE_SETUP: 504 case SNDRV_PCM_STATE_PREPARED: 505 break; 506 default: 507 snd_pcm_stream_unlock_irq(substream); 508 return -EBADFD; 509 } 510 snd_pcm_stream_unlock_irq(substream); 511 if (atomic_read(&substream->mmap_count)) 512 return -EBADFD; 513 if (substream->ops->hw_free) 514 result = substream->ops->hw_free(substream); 515 runtime->status->state = SNDRV_PCM_STATE_OPEN; 516 pm_qos_remove_request(&substream->latency_pm_qos_req); 517 return result; 518 } 519 520 static int snd_pcm_sw_params(struct snd_pcm_substream *substream, 521 struct snd_pcm_sw_params *params) 522 { 523 struct snd_pcm_runtime *runtime; 524 int err; 525 526 if (PCM_RUNTIME_CHECK(substream)) 527 return -ENXIO; 528 runtime = substream->runtime; 529 snd_pcm_stream_lock_irq(substream); 530 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 531 snd_pcm_stream_unlock_irq(substream); 532 return -EBADFD; 533 } 534 snd_pcm_stream_unlock_irq(substream); 535 536 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST) 537 return -EINVAL; 538 if (params->avail_min == 0) 539 return -EINVAL; 540 if (params->silence_size >= runtime->boundary) { 541 if (params->silence_threshold != 0) 542 return -EINVAL; 543 } else { 544 if (params->silence_size > params->silence_threshold) 545 return -EINVAL; 546 if (params->silence_threshold > runtime->buffer_size) 547 return -EINVAL; 548 } 549 err = 0; 550 snd_pcm_stream_lock_irq(substream); 551 runtime->tstamp_mode = params->tstamp_mode; 552 runtime->period_step = params->period_step; 553 runtime->control->avail_min = params->avail_min; 554 runtime->start_threshold = params->start_threshold; 555 runtime->stop_threshold = params->stop_threshold; 556 runtime->silence_threshold = params->silence_threshold; 557 runtime->silence_size = params->silence_size; 558 params->boundary = runtime->boundary; 559 if (snd_pcm_running(substream)) { 560 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 561 runtime->silence_size > 0) 562 snd_pcm_playback_silence(substream, ULONG_MAX); 563 err = snd_pcm_update_state(substream, runtime); 564 } 565 snd_pcm_stream_unlock_irq(substream); 566 return err; 567 } 568 569 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream, 570 struct snd_pcm_sw_params __user * _params) 571 { 572 struct snd_pcm_sw_params params; 573 int err; 574 if (copy_from_user(¶ms, _params, sizeof(params))) 575 return -EFAULT; 576 err = snd_pcm_sw_params(substream, ¶ms); 577 if (copy_to_user(_params, ¶ms, sizeof(params))) 578 return -EFAULT; 579 return err; 580 } 581 582 int snd_pcm_status(struct snd_pcm_substream *substream, 583 struct snd_pcm_status *status) 584 { 585 struct snd_pcm_runtime *runtime = substream->runtime; 586 587 snd_pcm_stream_lock_irq(substream); 588 status->state = runtime->status->state; 589 status->suspended_state = runtime->status->suspended_state; 590 if (status->state == SNDRV_PCM_STATE_OPEN) 591 goto _end; 592 status->trigger_tstamp = runtime->trigger_tstamp; 593 if (snd_pcm_running(substream)) { 594 snd_pcm_update_hw_ptr(substream); 595 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { 596 status->tstamp = runtime->status->tstamp; 597 goto _tstamp_end; 598 } 599 } 600 snd_pcm_gettime(runtime, &status->tstamp); 601 _tstamp_end: 602 status->appl_ptr = runtime->control->appl_ptr; 603 status->hw_ptr = runtime->status->hw_ptr; 604 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 605 status->avail = snd_pcm_playback_avail(runtime); 606 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING || 607 runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 608 status->delay = runtime->buffer_size - status->avail; 609 status->delay += runtime->delay; 610 } else 611 status->delay = 0; 612 } else { 613 status->avail = snd_pcm_capture_avail(runtime); 614 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) 615 status->delay = status->avail + runtime->delay; 616 else 617 status->delay = 0; 618 } 619 status->avail_max = runtime->avail_max; 620 status->overrange = runtime->overrange; 621 runtime->avail_max = 0; 622 runtime->overrange = 0; 623 _end: 624 snd_pcm_stream_unlock_irq(substream); 625 return 0; 626 } 627 628 static int snd_pcm_status_user(struct snd_pcm_substream *substream, 629 struct snd_pcm_status __user * _status) 630 { 631 struct snd_pcm_status status; 632 int res; 633 634 memset(&status, 0, sizeof(status)); 635 res = snd_pcm_status(substream, &status); 636 if (res < 0) 637 return res; 638 if (copy_to_user(_status, &status, sizeof(status))) 639 return -EFAULT; 640 return 0; 641 } 642 643 static int snd_pcm_channel_info(struct snd_pcm_substream *substream, 644 struct snd_pcm_channel_info * info) 645 { 646 struct snd_pcm_runtime *runtime; 647 unsigned int channel; 648 649 channel = info->channel; 650 runtime = substream->runtime; 651 snd_pcm_stream_lock_irq(substream); 652 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 653 snd_pcm_stream_unlock_irq(substream); 654 return -EBADFD; 655 } 656 snd_pcm_stream_unlock_irq(substream); 657 if (channel >= runtime->channels) 658 return -EINVAL; 659 memset(info, 0, sizeof(*info)); 660 info->channel = channel; 661 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info); 662 } 663 664 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream, 665 struct snd_pcm_channel_info __user * _info) 666 { 667 struct snd_pcm_channel_info info; 668 int res; 669 670 if (copy_from_user(&info, _info, sizeof(info))) 671 return -EFAULT; 672 res = snd_pcm_channel_info(substream, &info); 673 if (res < 0) 674 return res; 675 if (copy_to_user(_info, &info, sizeof(info))) 676 return -EFAULT; 677 return 0; 678 } 679 680 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream) 681 { 682 struct snd_pcm_runtime *runtime = substream->runtime; 683 if (runtime->trigger_master == NULL) 684 return; 685 if (runtime->trigger_master == substream) { 686 snd_pcm_gettime(runtime, &runtime->trigger_tstamp); 687 } else { 688 snd_pcm_trigger_tstamp(runtime->trigger_master); 689 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp; 690 } 691 runtime->trigger_master = NULL; 692 } 693 694 struct action_ops { 695 int (*pre_action)(struct snd_pcm_substream *substream, int state); 696 int (*do_action)(struct snd_pcm_substream *substream, int state); 697 void (*undo_action)(struct snd_pcm_substream *substream, int state); 698 void (*post_action)(struct snd_pcm_substream *substream, int state); 699 }; 700 701 /* 702 * this functions is core for handling of linked stream 703 * Note: the stream state might be changed also on failure 704 * Note2: call with calling stream lock + link lock 705 */ 706 static int snd_pcm_action_group(struct action_ops *ops, 707 struct snd_pcm_substream *substream, 708 int state, int do_lock) 709 { 710 struct snd_pcm_substream *s = NULL; 711 struct snd_pcm_substream *s1; 712 int res = 0; 713 714 snd_pcm_group_for_each_entry(s, substream) { 715 if (do_lock && s != substream) 716 spin_lock_nested(&s->self_group.lock, 717 SINGLE_DEPTH_NESTING); 718 res = ops->pre_action(s, state); 719 if (res < 0) 720 goto _unlock; 721 } 722 snd_pcm_group_for_each_entry(s, substream) { 723 res = ops->do_action(s, state); 724 if (res < 0) { 725 if (ops->undo_action) { 726 snd_pcm_group_for_each_entry(s1, substream) { 727 if (s1 == s) /* failed stream */ 728 break; 729 ops->undo_action(s1, state); 730 } 731 } 732 s = NULL; /* unlock all */ 733 goto _unlock; 734 } 735 } 736 snd_pcm_group_for_each_entry(s, substream) { 737 ops->post_action(s, state); 738 } 739 _unlock: 740 if (do_lock) { 741 /* unlock streams */ 742 snd_pcm_group_for_each_entry(s1, substream) { 743 if (s1 != substream) 744 spin_unlock(&s1->self_group.lock); 745 if (s1 == s) /* end */ 746 break; 747 } 748 } 749 return res; 750 } 751 752 /* 753 * Note: call with stream lock 754 */ 755 static int snd_pcm_action_single(struct action_ops *ops, 756 struct snd_pcm_substream *substream, 757 int state) 758 { 759 int res; 760 761 res = ops->pre_action(substream, state); 762 if (res < 0) 763 return res; 764 res = ops->do_action(substream, state); 765 if (res == 0) 766 ops->post_action(substream, state); 767 else if (ops->undo_action) 768 ops->undo_action(substream, state); 769 return res; 770 } 771 772 /* 773 * Note: call with stream lock 774 */ 775 static int snd_pcm_action(struct action_ops *ops, 776 struct snd_pcm_substream *substream, 777 int state) 778 { 779 int res; 780 781 if (snd_pcm_stream_linked(substream)) { 782 if (!spin_trylock(&substream->group->lock)) { 783 spin_unlock(&substream->self_group.lock); 784 spin_lock(&substream->group->lock); 785 spin_lock(&substream->self_group.lock); 786 } 787 res = snd_pcm_action_group(ops, substream, state, 1); 788 spin_unlock(&substream->group->lock); 789 } else { 790 res = snd_pcm_action_single(ops, substream, state); 791 } 792 return res; 793 } 794 795 /* 796 * Note: don't use any locks before 797 */ 798 static int snd_pcm_action_lock_irq(struct action_ops *ops, 799 struct snd_pcm_substream *substream, 800 int state) 801 { 802 int res; 803 804 read_lock_irq(&snd_pcm_link_rwlock); 805 if (snd_pcm_stream_linked(substream)) { 806 spin_lock(&substream->group->lock); 807 spin_lock(&substream->self_group.lock); 808 res = snd_pcm_action_group(ops, substream, state, 1); 809 spin_unlock(&substream->self_group.lock); 810 spin_unlock(&substream->group->lock); 811 } else { 812 spin_lock(&substream->self_group.lock); 813 res = snd_pcm_action_single(ops, substream, state); 814 spin_unlock(&substream->self_group.lock); 815 } 816 read_unlock_irq(&snd_pcm_link_rwlock); 817 return res; 818 } 819 820 /* 821 */ 822 static int snd_pcm_action_nonatomic(struct action_ops *ops, 823 struct snd_pcm_substream *substream, 824 int state) 825 { 826 int res; 827 828 down_read(&snd_pcm_link_rwsem); 829 if (snd_pcm_stream_linked(substream)) 830 res = snd_pcm_action_group(ops, substream, state, 0); 831 else 832 res = snd_pcm_action_single(ops, substream, state); 833 up_read(&snd_pcm_link_rwsem); 834 return res; 835 } 836 837 /* 838 * start callbacks 839 */ 840 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state) 841 { 842 struct snd_pcm_runtime *runtime = substream->runtime; 843 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED) 844 return -EBADFD; 845 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 846 !snd_pcm_playback_data(substream)) 847 return -EPIPE; 848 runtime->trigger_master = substream; 849 return 0; 850 } 851 852 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state) 853 { 854 if (substream->runtime->trigger_master != substream) 855 return 0; 856 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START); 857 } 858 859 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state) 860 { 861 if (substream->runtime->trigger_master == substream) 862 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); 863 } 864 865 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state) 866 { 867 struct snd_pcm_runtime *runtime = substream->runtime; 868 snd_pcm_trigger_tstamp(substream); 869 runtime->hw_ptr_jiffies = jiffies; 870 runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) / 871 runtime->rate; 872 runtime->status->state = state; 873 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 874 runtime->silence_size > 0) 875 snd_pcm_playback_silence(substream, ULONG_MAX); 876 if (substream->timer) 877 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART, 878 &runtime->trigger_tstamp); 879 } 880 881 static struct action_ops snd_pcm_action_start = { 882 .pre_action = snd_pcm_pre_start, 883 .do_action = snd_pcm_do_start, 884 .undo_action = snd_pcm_undo_start, 885 .post_action = snd_pcm_post_start 886 }; 887 888 /** 889 * snd_pcm_start - start all linked streams 890 * @substream: the PCM substream instance 891 */ 892 int snd_pcm_start(struct snd_pcm_substream *substream) 893 { 894 return snd_pcm_action(&snd_pcm_action_start, substream, 895 SNDRV_PCM_STATE_RUNNING); 896 } 897 898 /* 899 * stop callbacks 900 */ 901 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state) 902 { 903 struct snd_pcm_runtime *runtime = substream->runtime; 904 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 905 return -EBADFD; 906 runtime->trigger_master = substream; 907 return 0; 908 } 909 910 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state) 911 { 912 if (substream->runtime->trigger_master == substream && 913 snd_pcm_running(substream)) 914 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); 915 return 0; /* unconditonally stop all substreams */ 916 } 917 918 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state) 919 { 920 struct snd_pcm_runtime *runtime = substream->runtime; 921 if (runtime->status->state != state) { 922 snd_pcm_trigger_tstamp(substream); 923 if (substream->timer) 924 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP, 925 &runtime->trigger_tstamp); 926 runtime->status->state = state; 927 } 928 wake_up(&runtime->sleep); 929 wake_up(&runtime->tsleep); 930 } 931 932 static struct action_ops snd_pcm_action_stop = { 933 .pre_action = snd_pcm_pre_stop, 934 .do_action = snd_pcm_do_stop, 935 .post_action = snd_pcm_post_stop 936 }; 937 938 /** 939 * snd_pcm_stop - try to stop all running streams in the substream group 940 * @substream: the PCM substream instance 941 * @state: PCM state after stopping the stream 942 * 943 * The state of each stream is then changed to the given state unconditionally. 944 */ 945 int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state) 946 { 947 return snd_pcm_action(&snd_pcm_action_stop, substream, state); 948 } 949 950 EXPORT_SYMBOL(snd_pcm_stop); 951 952 /** 953 * snd_pcm_drain_done - stop the DMA only when the given stream is playback 954 * @substream: the PCM substream 955 * 956 * After stopping, the state is changed to SETUP. 957 * Unlike snd_pcm_stop(), this affects only the given stream. 958 */ 959 int snd_pcm_drain_done(struct snd_pcm_substream *substream) 960 { 961 return snd_pcm_action_single(&snd_pcm_action_stop, substream, 962 SNDRV_PCM_STATE_SETUP); 963 } 964 965 /* 966 * pause callbacks 967 */ 968 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push) 969 { 970 struct snd_pcm_runtime *runtime = substream->runtime; 971 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE)) 972 return -ENOSYS; 973 if (push) { 974 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING) 975 return -EBADFD; 976 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED) 977 return -EBADFD; 978 runtime->trigger_master = substream; 979 return 0; 980 } 981 982 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push) 983 { 984 if (substream->runtime->trigger_master != substream) 985 return 0; 986 /* some drivers might use hw_ptr to recover from the pause - 987 update the hw_ptr now */ 988 if (push) 989 snd_pcm_update_hw_ptr(substream); 990 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by 991 * a delta between the current jiffies, this gives a large enough 992 * delta, effectively to skip the check once. 993 */ 994 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000; 995 return substream->ops->trigger(substream, 996 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH : 997 SNDRV_PCM_TRIGGER_PAUSE_RELEASE); 998 } 999 1000 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push) 1001 { 1002 if (substream->runtime->trigger_master == substream) 1003 substream->ops->trigger(substream, 1004 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE : 1005 SNDRV_PCM_TRIGGER_PAUSE_PUSH); 1006 } 1007 1008 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push) 1009 { 1010 struct snd_pcm_runtime *runtime = substream->runtime; 1011 snd_pcm_trigger_tstamp(substream); 1012 if (push) { 1013 runtime->status->state = SNDRV_PCM_STATE_PAUSED; 1014 if (substream->timer) 1015 snd_timer_notify(substream->timer, 1016 SNDRV_TIMER_EVENT_MPAUSE, 1017 &runtime->trigger_tstamp); 1018 wake_up(&runtime->sleep); 1019 wake_up(&runtime->tsleep); 1020 } else { 1021 runtime->status->state = SNDRV_PCM_STATE_RUNNING; 1022 if (substream->timer) 1023 snd_timer_notify(substream->timer, 1024 SNDRV_TIMER_EVENT_MCONTINUE, 1025 &runtime->trigger_tstamp); 1026 } 1027 } 1028 1029 static struct action_ops snd_pcm_action_pause = { 1030 .pre_action = snd_pcm_pre_pause, 1031 .do_action = snd_pcm_do_pause, 1032 .undo_action = snd_pcm_undo_pause, 1033 .post_action = snd_pcm_post_pause 1034 }; 1035 1036 /* 1037 * Push/release the pause for all linked streams. 1038 */ 1039 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push) 1040 { 1041 return snd_pcm_action(&snd_pcm_action_pause, substream, push); 1042 } 1043 1044 #ifdef CONFIG_PM 1045 /* suspend */ 1046 1047 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state) 1048 { 1049 struct snd_pcm_runtime *runtime = substream->runtime; 1050 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1051 return -EBUSY; 1052 runtime->trigger_master = substream; 1053 return 0; 1054 } 1055 1056 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state) 1057 { 1058 struct snd_pcm_runtime *runtime = substream->runtime; 1059 if (runtime->trigger_master != substream) 1060 return 0; 1061 if (! snd_pcm_running(substream)) 1062 return 0; 1063 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); 1064 return 0; /* suspend unconditionally */ 1065 } 1066 1067 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state) 1068 { 1069 struct snd_pcm_runtime *runtime = substream->runtime; 1070 snd_pcm_trigger_tstamp(substream); 1071 if (substream->timer) 1072 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND, 1073 &runtime->trigger_tstamp); 1074 runtime->status->suspended_state = runtime->status->state; 1075 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED; 1076 wake_up(&runtime->sleep); 1077 wake_up(&runtime->tsleep); 1078 } 1079 1080 static struct action_ops snd_pcm_action_suspend = { 1081 .pre_action = snd_pcm_pre_suspend, 1082 .do_action = snd_pcm_do_suspend, 1083 .post_action = snd_pcm_post_suspend 1084 }; 1085 1086 /** 1087 * snd_pcm_suspend - trigger SUSPEND to all linked streams 1088 * @substream: the PCM substream 1089 * 1090 * After this call, all streams are changed to SUSPENDED state. 1091 */ 1092 int snd_pcm_suspend(struct snd_pcm_substream *substream) 1093 { 1094 int err; 1095 unsigned long flags; 1096 1097 if (! substream) 1098 return 0; 1099 1100 snd_pcm_stream_lock_irqsave(substream, flags); 1101 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0); 1102 snd_pcm_stream_unlock_irqrestore(substream, flags); 1103 return err; 1104 } 1105 1106 EXPORT_SYMBOL(snd_pcm_suspend); 1107 1108 /** 1109 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm 1110 * @pcm: the PCM instance 1111 * 1112 * After this call, all streams are changed to SUSPENDED state. 1113 */ 1114 int snd_pcm_suspend_all(struct snd_pcm *pcm) 1115 { 1116 struct snd_pcm_substream *substream; 1117 int stream, err = 0; 1118 1119 if (! pcm) 1120 return 0; 1121 1122 for (stream = 0; stream < 2; stream++) { 1123 for (substream = pcm->streams[stream].substream; 1124 substream; substream = substream->next) { 1125 /* FIXME: the open/close code should lock this as well */ 1126 if (substream->runtime == NULL) 1127 continue; 1128 err = snd_pcm_suspend(substream); 1129 if (err < 0 && err != -EBUSY) 1130 return err; 1131 } 1132 } 1133 return 0; 1134 } 1135 1136 EXPORT_SYMBOL(snd_pcm_suspend_all); 1137 1138 /* resume */ 1139 1140 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state) 1141 { 1142 struct snd_pcm_runtime *runtime = substream->runtime; 1143 if (!(runtime->info & SNDRV_PCM_INFO_RESUME)) 1144 return -ENOSYS; 1145 runtime->trigger_master = substream; 1146 return 0; 1147 } 1148 1149 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state) 1150 { 1151 struct snd_pcm_runtime *runtime = substream->runtime; 1152 if (runtime->trigger_master != substream) 1153 return 0; 1154 /* DMA not running previously? */ 1155 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING && 1156 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING || 1157 substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) 1158 return 0; 1159 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME); 1160 } 1161 1162 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state) 1163 { 1164 if (substream->runtime->trigger_master == substream && 1165 snd_pcm_running(substream)) 1166 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); 1167 } 1168 1169 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state) 1170 { 1171 struct snd_pcm_runtime *runtime = substream->runtime; 1172 snd_pcm_trigger_tstamp(substream); 1173 if (substream->timer) 1174 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME, 1175 &runtime->trigger_tstamp); 1176 runtime->status->state = runtime->status->suspended_state; 1177 } 1178 1179 static struct action_ops snd_pcm_action_resume = { 1180 .pre_action = snd_pcm_pre_resume, 1181 .do_action = snd_pcm_do_resume, 1182 .undo_action = snd_pcm_undo_resume, 1183 .post_action = snd_pcm_post_resume 1184 }; 1185 1186 static int snd_pcm_resume(struct snd_pcm_substream *substream) 1187 { 1188 struct snd_card *card = substream->pcm->card; 1189 int res; 1190 1191 snd_power_lock(card); 1192 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) 1193 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0); 1194 snd_power_unlock(card); 1195 return res; 1196 } 1197 1198 #else 1199 1200 static int snd_pcm_resume(struct snd_pcm_substream *substream) 1201 { 1202 return -ENOSYS; 1203 } 1204 1205 #endif /* CONFIG_PM */ 1206 1207 /* 1208 * xrun ioctl 1209 * 1210 * Change the RUNNING stream(s) to XRUN state. 1211 */ 1212 static int snd_pcm_xrun(struct snd_pcm_substream *substream) 1213 { 1214 struct snd_card *card = substream->pcm->card; 1215 struct snd_pcm_runtime *runtime = substream->runtime; 1216 int result; 1217 1218 snd_power_lock(card); 1219 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1220 result = snd_power_wait(card, SNDRV_CTL_POWER_D0); 1221 if (result < 0) 1222 goto _unlock; 1223 } 1224 1225 snd_pcm_stream_lock_irq(substream); 1226 switch (runtime->status->state) { 1227 case SNDRV_PCM_STATE_XRUN: 1228 result = 0; /* already there */ 1229 break; 1230 case SNDRV_PCM_STATE_RUNNING: 1231 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); 1232 break; 1233 default: 1234 result = -EBADFD; 1235 } 1236 snd_pcm_stream_unlock_irq(substream); 1237 _unlock: 1238 snd_power_unlock(card); 1239 return result; 1240 } 1241 1242 /* 1243 * reset ioctl 1244 */ 1245 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state) 1246 { 1247 struct snd_pcm_runtime *runtime = substream->runtime; 1248 switch (runtime->status->state) { 1249 case SNDRV_PCM_STATE_RUNNING: 1250 case SNDRV_PCM_STATE_PREPARED: 1251 case SNDRV_PCM_STATE_PAUSED: 1252 case SNDRV_PCM_STATE_SUSPENDED: 1253 return 0; 1254 default: 1255 return -EBADFD; 1256 } 1257 } 1258 1259 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state) 1260 { 1261 struct snd_pcm_runtime *runtime = substream->runtime; 1262 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL); 1263 if (err < 0) 1264 return err; 1265 runtime->hw_ptr_base = 0; 1266 runtime->hw_ptr_interrupt = runtime->status->hw_ptr - 1267 runtime->status->hw_ptr % runtime->period_size; 1268 runtime->silence_start = runtime->status->hw_ptr; 1269 runtime->silence_filled = 0; 1270 return 0; 1271 } 1272 1273 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state) 1274 { 1275 struct snd_pcm_runtime *runtime = substream->runtime; 1276 runtime->control->appl_ptr = runtime->status->hw_ptr; 1277 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 1278 runtime->silence_size > 0) 1279 snd_pcm_playback_silence(substream, ULONG_MAX); 1280 } 1281 1282 static struct action_ops snd_pcm_action_reset = { 1283 .pre_action = snd_pcm_pre_reset, 1284 .do_action = snd_pcm_do_reset, 1285 .post_action = snd_pcm_post_reset 1286 }; 1287 1288 static int snd_pcm_reset(struct snd_pcm_substream *substream) 1289 { 1290 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0); 1291 } 1292 1293 /* 1294 * prepare ioctl 1295 */ 1296 /* we use the second argument for updating f_flags */ 1297 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream, 1298 int f_flags) 1299 { 1300 struct snd_pcm_runtime *runtime = substream->runtime; 1301 if (runtime->status->state == SNDRV_PCM_STATE_OPEN || 1302 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED) 1303 return -EBADFD; 1304 if (snd_pcm_running(substream)) 1305 return -EBUSY; 1306 substream->f_flags = f_flags; 1307 return 0; 1308 } 1309 1310 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state) 1311 { 1312 int err; 1313 err = substream->ops->prepare(substream); 1314 if (err < 0) 1315 return err; 1316 return snd_pcm_do_reset(substream, 0); 1317 } 1318 1319 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state) 1320 { 1321 struct snd_pcm_runtime *runtime = substream->runtime; 1322 runtime->control->appl_ptr = runtime->status->hw_ptr; 1323 runtime->status->state = SNDRV_PCM_STATE_PREPARED; 1324 } 1325 1326 static struct action_ops snd_pcm_action_prepare = { 1327 .pre_action = snd_pcm_pre_prepare, 1328 .do_action = snd_pcm_do_prepare, 1329 .post_action = snd_pcm_post_prepare 1330 }; 1331 1332 /** 1333 * snd_pcm_prepare - prepare the PCM substream to be triggerable 1334 * @substream: the PCM substream instance 1335 * @file: file to refer f_flags 1336 */ 1337 static int snd_pcm_prepare(struct snd_pcm_substream *substream, 1338 struct file *file) 1339 { 1340 int res; 1341 struct snd_card *card = substream->pcm->card; 1342 int f_flags; 1343 1344 if (file) 1345 f_flags = file->f_flags; 1346 else 1347 f_flags = substream->f_flags; 1348 1349 snd_power_lock(card); 1350 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) 1351 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare, 1352 substream, f_flags); 1353 snd_power_unlock(card); 1354 return res; 1355 } 1356 1357 /* 1358 * drain ioctl 1359 */ 1360 1361 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state) 1362 { 1363 struct snd_pcm_runtime *runtime = substream->runtime; 1364 switch (runtime->status->state) { 1365 case SNDRV_PCM_STATE_OPEN: 1366 case SNDRV_PCM_STATE_DISCONNECTED: 1367 case SNDRV_PCM_STATE_SUSPENDED: 1368 return -EBADFD; 1369 } 1370 runtime->trigger_master = substream; 1371 return 0; 1372 } 1373 1374 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state) 1375 { 1376 struct snd_pcm_runtime *runtime = substream->runtime; 1377 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 1378 switch (runtime->status->state) { 1379 case SNDRV_PCM_STATE_PREPARED: 1380 /* start playback stream if possible */ 1381 if (! snd_pcm_playback_empty(substream)) { 1382 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING); 1383 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING); 1384 } 1385 break; 1386 case SNDRV_PCM_STATE_RUNNING: 1387 runtime->status->state = SNDRV_PCM_STATE_DRAINING; 1388 break; 1389 case SNDRV_PCM_STATE_XRUN: 1390 runtime->status->state = SNDRV_PCM_STATE_SETUP; 1391 break; 1392 default: 1393 break; 1394 } 1395 } else { 1396 /* stop running stream */ 1397 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) { 1398 int new_state = snd_pcm_capture_avail(runtime) > 0 ? 1399 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP; 1400 snd_pcm_do_stop(substream, new_state); 1401 snd_pcm_post_stop(substream, new_state); 1402 } 1403 } 1404 return 0; 1405 } 1406 1407 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state) 1408 { 1409 } 1410 1411 static struct action_ops snd_pcm_action_drain_init = { 1412 .pre_action = snd_pcm_pre_drain_init, 1413 .do_action = snd_pcm_do_drain_init, 1414 .post_action = snd_pcm_post_drain_init 1415 }; 1416 1417 static int snd_pcm_drop(struct snd_pcm_substream *substream); 1418 1419 /* 1420 * Drain the stream(s). 1421 * When the substream is linked, sync until the draining of all playback streams 1422 * is finished. 1423 * After this call, all streams are supposed to be either SETUP or DRAINING 1424 * (capture only) state. 1425 */ 1426 static int snd_pcm_drain(struct snd_pcm_substream *substream, 1427 struct file *file) 1428 { 1429 struct snd_card *card; 1430 struct snd_pcm_runtime *runtime; 1431 struct snd_pcm_substream *s; 1432 wait_queue_t wait; 1433 int result = 0; 1434 int nonblock = 0; 1435 1436 card = substream->pcm->card; 1437 runtime = substream->runtime; 1438 1439 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 1440 return -EBADFD; 1441 1442 snd_power_lock(card); 1443 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1444 result = snd_power_wait(card, SNDRV_CTL_POWER_D0); 1445 if (result < 0) { 1446 snd_power_unlock(card); 1447 return result; 1448 } 1449 } 1450 1451 if (file) { 1452 if (file->f_flags & O_NONBLOCK) 1453 nonblock = 1; 1454 } else if (substream->f_flags & O_NONBLOCK) 1455 nonblock = 1; 1456 1457 down_read(&snd_pcm_link_rwsem); 1458 snd_pcm_stream_lock_irq(substream); 1459 /* resume pause */ 1460 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) 1461 snd_pcm_pause(substream, 0); 1462 1463 /* pre-start/stop - all running streams are changed to DRAINING state */ 1464 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0); 1465 if (result < 0) 1466 goto unlock; 1467 /* in non-blocking, we don't wait in ioctl but let caller poll */ 1468 if (nonblock) { 1469 result = -EAGAIN; 1470 goto unlock; 1471 } 1472 1473 for (;;) { 1474 long tout; 1475 struct snd_pcm_runtime *to_check; 1476 if (signal_pending(current)) { 1477 result = -ERESTARTSYS; 1478 break; 1479 } 1480 /* find a substream to drain */ 1481 to_check = NULL; 1482 snd_pcm_group_for_each_entry(s, substream) { 1483 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK) 1484 continue; 1485 runtime = s->runtime; 1486 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 1487 to_check = runtime; 1488 break; 1489 } 1490 } 1491 if (!to_check) 1492 break; /* all drained */ 1493 init_waitqueue_entry(&wait, current); 1494 add_wait_queue(&to_check->sleep, &wait); 1495 snd_pcm_stream_unlock_irq(substream); 1496 up_read(&snd_pcm_link_rwsem); 1497 snd_power_unlock(card); 1498 if (runtime->no_period_wakeup) 1499 tout = MAX_SCHEDULE_TIMEOUT; 1500 else { 1501 tout = 10; 1502 if (runtime->rate) { 1503 long t = runtime->period_size * 2 / runtime->rate; 1504 tout = max(t, tout); 1505 } 1506 tout = msecs_to_jiffies(tout * 1000); 1507 } 1508 tout = schedule_timeout_interruptible(tout); 1509 snd_power_lock(card); 1510 down_read(&snd_pcm_link_rwsem); 1511 snd_pcm_stream_lock_irq(substream); 1512 remove_wait_queue(&to_check->sleep, &wait); 1513 if (tout == 0) { 1514 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1515 result = -ESTRPIPE; 1516 else { 1517 snd_printd("playback drain error (DMA or IRQ trouble?)\n"); 1518 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1519 result = -EIO; 1520 } 1521 break; 1522 } 1523 } 1524 1525 unlock: 1526 snd_pcm_stream_unlock_irq(substream); 1527 up_read(&snd_pcm_link_rwsem); 1528 snd_power_unlock(card); 1529 1530 return result; 1531 } 1532 1533 /* 1534 * drop ioctl 1535 * 1536 * Immediately put all linked substreams into SETUP state. 1537 */ 1538 static int snd_pcm_drop(struct snd_pcm_substream *substream) 1539 { 1540 struct snd_pcm_runtime *runtime; 1541 int result = 0; 1542 1543 if (PCM_RUNTIME_CHECK(substream)) 1544 return -ENXIO; 1545 runtime = substream->runtime; 1546 1547 if (runtime->status->state == SNDRV_PCM_STATE_OPEN || 1548 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED || 1549 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1550 return -EBADFD; 1551 1552 snd_pcm_stream_lock_irq(substream); 1553 /* resume pause */ 1554 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) 1555 snd_pcm_pause(substream, 0); 1556 1557 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1558 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */ 1559 snd_pcm_stream_unlock_irq(substream); 1560 1561 return result; 1562 } 1563 1564 1565 /* WARNING: Don't forget to fput back the file */ 1566 static struct file *snd_pcm_file_fd(int fd, int *fput_needed) 1567 { 1568 struct file *file; 1569 struct inode *inode; 1570 unsigned int minor; 1571 1572 file = fget_light(fd, fput_needed); 1573 if (!file) 1574 return NULL; 1575 inode = file->f_path.dentry->d_inode; 1576 if (!S_ISCHR(inode->i_mode) || 1577 imajor(inode) != snd_major) { 1578 fput_light(file, *fput_needed); 1579 return NULL; 1580 } 1581 minor = iminor(inode); 1582 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) && 1583 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) { 1584 fput_light(file, *fput_needed); 1585 return NULL; 1586 } 1587 return file; 1588 } 1589 1590 /* 1591 * PCM link handling 1592 */ 1593 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd) 1594 { 1595 int res = 0; 1596 struct file *file; 1597 struct snd_pcm_file *pcm_file; 1598 struct snd_pcm_substream *substream1; 1599 struct snd_pcm_group *group; 1600 int fput_needed; 1601 1602 file = snd_pcm_file_fd(fd, &fput_needed); 1603 if (!file) 1604 return -EBADFD; 1605 pcm_file = file->private_data; 1606 substream1 = pcm_file->substream; 1607 group = kmalloc(sizeof(*group), GFP_KERNEL); 1608 if (!group) { 1609 res = -ENOMEM; 1610 goto _nolock; 1611 } 1612 down_write(&snd_pcm_link_rwsem); 1613 write_lock_irq(&snd_pcm_link_rwlock); 1614 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN || 1615 substream->runtime->status->state != substream1->runtime->status->state) { 1616 res = -EBADFD; 1617 goto _end; 1618 } 1619 if (snd_pcm_stream_linked(substream1)) { 1620 res = -EALREADY; 1621 goto _end; 1622 } 1623 if (!snd_pcm_stream_linked(substream)) { 1624 substream->group = group; 1625 spin_lock_init(&substream->group->lock); 1626 INIT_LIST_HEAD(&substream->group->substreams); 1627 list_add_tail(&substream->link_list, &substream->group->substreams); 1628 substream->group->count = 1; 1629 } 1630 list_add_tail(&substream1->link_list, &substream->group->substreams); 1631 substream->group->count++; 1632 substream1->group = substream->group; 1633 _end: 1634 write_unlock_irq(&snd_pcm_link_rwlock); 1635 up_write(&snd_pcm_link_rwsem); 1636 _nolock: 1637 fput_light(file, fput_needed); 1638 if (res < 0) 1639 kfree(group); 1640 return res; 1641 } 1642 1643 static void relink_to_local(struct snd_pcm_substream *substream) 1644 { 1645 substream->group = &substream->self_group; 1646 INIT_LIST_HEAD(&substream->self_group.substreams); 1647 list_add_tail(&substream->link_list, &substream->self_group.substreams); 1648 } 1649 1650 static int snd_pcm_unlink(struct snd_pcm_substream *substream) 1651 { 1652 struct snd_pcm_substream *s; 1653 int res = 0; 1654 1655 down_write(&snd_pcm_link_rwsem); 1656 write_lock_irq(&snd_pcm_link_rwlock); 1657 if (!snd_pcm_stream_linked(substream)) { 1658 res = -EALREADY; 1659 goto _end; 1660 } 1661 list_del(&substream->link_list); 1662 substream->group->count--; 1663 if (substream->group->count == 1) { /* detach the last stream, too */ 1664 snd_pcm_group_for_each_entry(s, substream) { 1665 relink_to_local(s); 1666 break; 1667 } 1668 kfree(substream->group); 1669 } 1670 relink_to_local(substream); 1671 _end: 1672 write_unlock_irq(&snd_pcm_link_rwlock); 1673 up_write(&snd_pcm_link_rwsem); 1674 return res; 1675 } 1676 1677 /* 1678 * hw configurator 1679 */ 1680 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params, 1681 struct snd_pcm_hw_rule *rule) 1682 { 1683 struct snd_interval t; 1684 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]), 1685 hw_param_interval_c(params, rule->deps[1]), &t); 1686 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1687 } 1688 1689 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params, 1690 struct snd_pcm_hw_rule *rule) 1691 { 1692 struct snd_interval t; 1693 snd_interval_div(hw_param_interval_c(params, rule->deps[0]), 1694 hw_param_interval_c(params, rule->deps[1]), &t); 1695 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1696 } 1697 1698 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params, 1699 struct snd_pcm_hw_rule *rule) 1700 { 1701 struct snd_interval t; 1702 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]), 1703 hw_param_interval_c(params, rule->deps[1]), 1704 (unsigned long) rule->private, &t); 1705 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1706 } 1707 1708 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params, 1709 struct snd_pcm_hw_rule *rule) 1710 { 1711 struct snd_interval t; 1712 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]), 1713 (unsigned long) rule->private, 1714 hw_param_interval_c(params, rule->deps[1]), &t); 1715 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1716 } 1717 1718 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params, 1719 struct snd_pcm_hw_rule *rule) 1720 { 1721 unsigned int k; 1722 struct snd_interval *i = hw_param_interval(params, rule->deps[0]); 1723 struct snd_mask m; 1724 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 1725 snd_mask_any(&m); 1726 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { 1727 int bits; 1728 if (! snd_mask_test(mask, k)) 1729 continue; 1730 bits = snd_pcm_format_physical_width(k); 1731 if (bits <= 0) 1732 continue; /* ignore invalid formats */ 1733 if ((unsigned)bits < i->min || (unsigned)bits > i->max) 1734 snd_mask_reset(&m, k); 1735 } 1736 return snd_mask_refine(mask, &m); 1737 } 1738 1739 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params, 1740 struct snd_pcm_hw_rule *rule) 1741 { 1742 struct snd_interval t; 1743 unsigned int k; 1744 t.min = UINT_MAX; 1745 t.max = 0; 1746 t.openmin = 0; 1747 t.openmax = 0; 1748 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { 1749 int bits; 1750 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k)) 1751 continue; 1752 bits = snd_pcm_format_physical_width(k); 1753 if (bits <= 0) 1754 continue; /* ignore invalid formats */ 1755 if (t.min > (unsigned)bits) 1756 t.min = bits; 1757 if (t.max < (unsigned)bits) 1758 t.max = bits; 1759 } 1760 t.integer = 1; 1761 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1762 } 1763 1764 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12 1765 #error "Change this table" 1766 #endif 1767 1768 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100, 1769 48000, 64000, 88200, 96000, 176400, 192000 }; 1770 1771 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = { 1772 .count = ARRAY_SIZE(rates), 1773 .list = rates, 1774 }; 1775 1776 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params, 1777 struct snd_pcm_hw_rule *rule) 1778 { 1779 struct snd_pcm_hardware *hw = rule->private; 1780 return snd_interval_list(hw_param_interval(params, rule->var), 1781 snd_pcm_known_rates.count, 1782 snd_pcm_known_rates.list, hw->rates); 1783 } 1784 1785 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params, 1786 struct snd_pcm_hw_rule *rule) 1787 { 1788 struct snd_interval t; 1789 struct snd_pcm_substream *substream = rule->private; 1790 t.min = 0; 1791 t.max = substream->buffer_bytes_max; 1792 t.openmin = 0; 1793 t.openmax = 0; 1794 t.integer = 1; 1795 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1796 } 1797 1798 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream) 1799 { 1800 struct snd_pcm_runtime *runtime = substream->runtime; 1801 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; 1802 int k, err; 1803 1804 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { 1805 snd_mask_any(constrs_mask(constrs, k)); 1806 } 1807 1808 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { 1809 snd_interval_any(constrs_interval(constrs, k)); 1810 } 1811 1812 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS)); 1813 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)); 1814 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)); 1815 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)); 1816 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS)); 1817 1818 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, 1819 snd_pcm_hw_rule_format, NULL, 1820 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1821 if (err < 0) 1822 return err; 1823 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 1824 snd_pcm_hw_rule_sample_bits, NULL, 1825 SNDRV_PCM_HW_PARAM_FORMAT, 1826 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1827 if (err < 0) 1828 return err; 1829 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 1830 snd_pcm_hw_rule_div, NULL, 1831 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); 1832 if (err < 0) 1833 return err; 1834 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1835 snd_pcm_hw_rule_mul, NULL, 1836 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); 1837 if (err < 0) 1838 return err; 1839 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1840 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1841 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 1842 if (err < 0) 1843 return err; 1844 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1845 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1846 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1); 1847 if (err < 0) 1848 return err; 1849 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 1850 snd_pcm_hw_rule_div, NULL, 1851 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1852 if (err < 0) 1853 return err; 1854 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1855 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1856 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1); 1857 if (err < 0) 1858 return err; 1859 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1860 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1861 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1); 1862 if (err < 0) 1863 return err; 1864 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, 1865 snd_pcm_hw_rule_div, NULL, 1866 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 1867 if (err < 0) 1868 return err; 1869 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1870 snd_pcm_hw_rule_div, NULL, 1871 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); 1872 if (err < 0) 1873 return err; 1874 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1875 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1876 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1877 if (err < 0) 1878 return err; 1879 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1880 snd_pcm_hw_rule_muldivk, (void*) 1000000, 1881 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); 1882 if (err < 0) 1883 return err; 1884 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1885 snd_pcm_hw_rule_mul, NULL, 1886 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); 1887 if (err < 0) 1888 return err; 1889 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1890 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1891 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1892 if (err < 0) 1893 return err; 1894 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1895 snd_pcm_hw_rule_muldivk, (void*) 1000000, 1896 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); 1897 if (err < 0) 1898 return err; 1899 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 1900 snd_pcm_hw_rule_muldivk, (void*) 8, 1901 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1902 if (err < 0) 1903 return err; 1904 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1905 snd_pcm_hw_rule_muldivk, (void*) 8, 1906 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1907 if (err < 0) 1908 return err; 1909 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 1910 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1911 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); 1912 if (err < 0) 1913 return err; 1914 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME, 1915 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1916 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); 1917 if (err < 0) 1918 return err; 1919 return 0; 1920 } 1921 1922 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream) 1923 { 1924 struct snd_pcm_runtime *runtime = substream->runtime; 1925 struct snd_pcm_hardware *hw = &runtime->hw; 1926 int err; 1927 unsigned int mask = 0; 1928 1929 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) 1930 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED; 1931 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) 1932 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED; 1933 if (hw->info & SNDRV_PCM_INFO_MMAP) { 1934 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) 1935 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; 1936 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) 1937 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED; 1938 if (hw->info & SNDRV_PCM_INFO_COMPLEX) 1939 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX; 1940 } 1941 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask); 1942 if (err < 0) 1943 return err; 1944 1945 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats); 1946 if (err < 0) 1947 return err; 1948 1949 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD); 1950 if (err < 0) 1951 return err; 1952 1953 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, 1954 hw->channels_min, hw->channels_max); 1955 if (err < 0) 1956 return err; 1957 1958 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE, 1959 hw->rate_min, hw->rate_max); 1960 if (err < 0) 1961 return err; 1962 1963 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 1964 hw->period_bytes_min, hw->period_bytes_max); 1965 if (err < 0) 1966 return err; 1967 1968 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS, 1969 hw->periods_min, hw->periods_max); 1970 if (err < 0) 1971 return err; 1972 1973 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1974 hw->period_bytes_min, hw->buffer_bytes_max); 1975 if (err < 0) 1976 return err; 1977 1978 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1979 snd_pcm_hw_rule_buffer_bytes_max, substream, 1980 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1); 1981 if (err < 0) 1982 return err; 1983 1984 /* FIXME: remove */ 1985 if (runtime->dma_bytes) { 1986 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes); 1987 if (err < 0) 1988 return -EINVAL; 1989 } 1990 1991 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) { 1992 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1993 snd_pcm_hw_rule_rate, hw, 1994 SNDRV_PCM_HW_PARAM_RATE, -1); 1995 if (err < 0) 1996 return err; 1997 } 1998 1999 /* FIXME: this belong to lowlevel */ 2000 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE); 2001 2002 return 0; 2003 } 2004 2005 static void pcm_release_private(struct snd_pcm_substream *substream) 2006 { 2007 snd_pcm_unlink(substream); 2008 } 2009 2010 void snd_pcm_release_substream(struct snd_pcm_substream *substream) 2011 { 2012 substream->ref_count--; 2013 if (substream->ref_count > 0) 2014 return; 2015 2016 snd_pcm_drop(substream); 2017 if (substream->hw_opened) { 2018 if (substream->ops->hw_free != NULL) 2019 substream->ops->hw_free(substream); 2020 substream->ops->close(substream); 2021 substream->hw_opened = 0; 2022 } 2023 if (pm_qos_request_active(&substream->latency_pm_qos_req)) 2024 pm_qos_remove_request(&substream->latency_pm_qos_req); 2025 if (substream->pcm_release) { 2026 substream->pcm_release(substream); 2027 substream->pcm_release = NULL; 2028 } 2029 snd_pcm_detach_substream(substream); 2030 } 2031 2032 EXPORT_SYMBOL(snd_pcm_release_substream); 2033 2034 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, 2035 struct file *file, 2036 struct snd_pcm_substream **rsubstream) 2037 { 2038 struct snd_pcm_substream *substream; 2039 int err; 2040 2041 err = snd_pcm_attach_substream(pcm, stream, file, &substream); 2042 if (err < 0) 2043 return err; 2044 if (substream->ref_count > 1) { 2045 *rsubstream = substream; 2046 return 0; 2047 } 2048 2049 err = snd_pcm_hw_constraints_init(substream); 2050 if (err < 0) { 2051 snd_printd("snd_pcm_hw_constraints_init failed\n"); 2052 goto error; 2053 } 2054 2055 if ((err = substream->ops->open(substream)) < 0) 2056 goto error; 2057 2058 substream->hw_opened = 1; 2059 2060 err = snd_pcm_hw_constraints_complete(substream); 2061 if (err < 0) { 2062 snd_printd("snd_pcm_hw_constraints_complete failed\n"); 2063 goto error; 2064 } 2065 2066 *rsubstream = substream; 2067 return 0; 2068 2069 error: 2070 snd_pcm_release_substream(substream); 2071 return err; 2072 } 2073 2074 EXPORT_SYMBOL(snd_pcm_open_substream); 2075 2076 static int snd_pcm_open_file(struct file *file, 2077 struct snd_pcm *pcm, 2078 int stream) 2079 { 2080 struct snd_pcm_file *pcm_file; 2081 struct snd_pcm_substream *substream; 2082 int err; 2083 2084 err = snd_pcm_open_substream(pcm, stream, file, &substream); 2085 if (err < 0) 2086 return err; 2087 2088 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL); 2089 if (pcm_file == NULL) { 2090 snd_pcm_release_substream(substream); 2091 return -ENOMEM; 2092 } 2093 pcm_file->substream = substream; 2094 if (substream->ref_count == 1) { 2095 substream->file = pcm_file; 2096 substream->pcm_release = pcm_release_private; 2097 } 2098 file->private_data = pcm_file; 2099 2100 return 0; 2101 } 2102 2103 static int snd_pcm_playback_open(struct inode *inode, struct file *file) 2104 { 2105 struct snd_pcm *pcm; 2106 int err = nonseekable_open(inode, file); 2107 if (err < 0) 2108 return err; 2109 pcm = snd_lookup_minor_data(iminor(inode), 2110 SNDRV_DEVICE_TYPE_PCM_PLAYBACK); 2111 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK); 2112 } 2113 2114 static int snd_pcm_capture_open(struct inode *inode, struct file *file) 2115 { 2116 struct snd_pcm *pcm; 2117 int err = nonseekable_open(inode, file); 2118 if (err < 0) 2119 return err; 2120 pcm = snd_lookup_minor_data(iminor(inode), 2121 SNDRV_DEVICE_TYPE_PCM_CAPTURE); 2122 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE); 2123 } 2124 2125 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream) 2126 { 2127 int err; 2128 wait_queue_t wait; 2129 2130 if (pcm == NULL) { 2131 err = -ENODEV; 2132 goto __error1; 2133 } 2134 err = snd_card_file_add(pcm->card, file); 2135 if (err < 0) 2136 goto __error1; 2137 if (!try_module_get(pcm->card->module)) { 2138 err = -EFAULT; 2139 goto __error2; 2140 } 2141 init_waitqueue_entry(&wait, current); 2142 add_wait_queue(&pcm->open_wait, &wait); 2143 mutex_lock(&pcm->open_mutex); 2144 while (1) { 2145 err = snd_pcm_open_file(file, pcm, stream); 2146 if (err >= 0) 2147 break; 2148 if (err == -EAGAIN) { 2149 if (file->f_flags & O_NONBLOCK) { 2150 err = -EBUSY; 2151 break; 2152 } 2153 } else 2154 break; 2155 set_current_state(TASK_INTERRUPTIBLE); 2156 mutex_unlock(&pcm->open_mutex); 2157 schedule(); 2158 mutex_lock(&pcm->open_mutex); 2159 if (signal_pending(current)) { 2160 err = -ERESTARTSYS; 2161 break; 2162 } 2163 } 2164 remove_wait_queue(&pcm->open_wait, &wait); 2165 mutex_unlock(&pcm->open_mutex); 2166 if (err < 0) 2167 goto __error; 2168 return err; 2169 2170 __error: 2171 module_put(pcm->card->module); 2172 __error2: 2173 snd_card_file_remove(pcm->card, file); 2174 __error1: 2175 return err; 2176 } 2177 2178 static int snd_pcm_release(struct inode *inode, struct file *file) 2179 { 2180 struct snd_pcm *pcm; 2181 struct snd_pcm_substream *substream; 2182 struct snd_pcm_file *pcm_file; 2183 2184 pcm_file = file->private_data; 2185 substream = pcm_file->substream; 2186 if (snd_BUG_ON(!substream)) 2187 return -ENXIO; 2188 pcm = substream->pcm; 2189 mutex_lock(&pcm->open_mutex); 2190 snd_pcm_release_substream(substream); 2191 kfree(pcm_file); 2192 mutex_unlock(&pcm->open_mutex); 2193 wake_up(&pcm->open_wait); 2194 module_put(pcm->card->module); 2195 snd_card_file_remove(pcm->card, file); 2196 return 0; 2197 } 2198 2199 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream, 2200 snd_pcm_uframes_t frames) 2201 { 2202 struct snd_pcm_runtime *runtime = substream->runtime; 2203 snd_pcm_sframes_t appl_ptr; 2204 snd_pcm_sframes_t ret; 2205 snd_pcm_sframes_t hw_avail; 2206 2207 if (frames == 0) 2208 return 0; 2209 2210 snd_pcm_stream_lock_irq(substream); 2211 switch (runtime->status->state) { 2212 case SNDRV_PCM_STATE_PREPARED: 2213 break; 2214 case SNDRV_PCM_STATE_DRAINING: 2215 case SNDRV_PCM_STATE_RUNNING: 2216 if (snd_pcm_update_hw_ptr(substream) >= 0) 2217 break; 2218 /* Fall through */ 2219 case SNDRV_PCM_STATE_XRUN: 2220 ret = -EPIPE; 2221 goto __end; 2222 case SNDRV_PCM_STATE_SUSPENDED: 2223 ret = -ESTRPIPE; 2224 goto __end; 2225 default: 2226 ret = -EBADFD; 2227 goto __end; 2228 } 2229 2230 hw_avail = snd_pcm_playback_hw_avail(runtime); 2231 if (hw_avail <= 0) { 2232 ret = 0; 2233 goto __end; 2234 } 2235 if (frames > (snd_pcm_uframes_t)hw_avail) 2236 frames = hw_avail; 2237 appl_ptr = runtime->control->appl_ptr - frames; 2238 if (appl_ptr < 0) 2239 appl_ptr += runtime->boundary; 2240 runtime->control->appl_ptr = appl_ptr; 2241 ret = frames; 2242 __end: 2243 snd_pcm_stream_unlock_irq(substream); 2244 return ret; 2245 } 2246 2247 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream, 2248 snd_pcm_uframes_t frames) 2249 { 2250 struct snd_pcm_runtime *runtime = substream->runtime; 2251 snd_pcm_sframes_t appl_ptr; 2252 snd_pcm_sframes_t ret; 2253 snd_pcm_sframes_t hw_avail; 2254 2255 if (frames == 0) 2256 return 0; 2257 2258 snd_pcm_stream_lock_irq(substream); 2259 switch (runtime->status->state) { 2260 case SNDRV_PCM_STATE_PREPARED: 2261 case SNDRV_PCM_STATE_DRAINING: 2262 break; 2263 case SNDRV_PCM_STATE_RUNNING: 2264 if (snd_pcm_update_hw_ptr(substream) >= 0) 2265 break; 2266 /* Fall through */ 2267 case SNDRV_PCM_STATE_XRUN: 2268 ret = -EPIPE; 2269 goto __end; 2270 case SNDRV_PCM_STATE_SUSPENDED: 2271 ret = -ESTRPIPE; 2272 goto __end; 2273 default: 2274 ret = -EBADFD; 2275 goto __end; 2276 } 2277 2278 hw_avail = snd_pcm_capture_hw_avail(runtime); 2279 if (hw_avail <= 0) { 2280 ret = 0; 2281 goto __end; 2282 } 2283 if (frames > (snd_pcm_uframes_t)hw_avail) 2284 frames = hw_avail; 2285 appl_ptr = runtime->control->appl_ptr - frames; 2286 if (appl_ptr < 0) 2287 appl_ptr += runtime->boundary; 2288 runtime->control->appl_ptr = appl_ptr; 2289 ret = frames; 2290 __end: 2291 snd_pcm_stream_unlock_irq(substream); 2292 return ret; 2293 } 2294 2295 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream, 2296 snd_pcm_uframes_t frames) 2297 { 2298 struct snd_pcm_runtime *runtime = substream->runtime; 2299 snd_pcm_sframes_t appl_ptr; 2300 snd_pcm_sframes_t ret; 2301 snd_pcm_sframes_t avail; 2302 2303 if (frames == 0) 2304 return 0; 2305 2306 snd_pcm_stream_lock_irq(substream); 2307 switch (runtime->status->state) { 2308 case SNDRV_PCM_STATE_PREPARED: 2309 case SNDRV_PCM_STATE_PAUSED: 2310 break; 2311 case SNDRV_PCM_STATE_DRAINING: 2312 case SNDRV_PCM_STATE_RUNNING: 2313 if (snd_pcm_update_hw_ptr(substream) >= 0) 2314 break; 2315 /* Fall through */ 2316 case SNDRV_PCM_STATE_XRUN: 2317 ret = -EPIPE; 2318 goto __end; 2319 case SNDRV_PCM_STATE_SUSPENDED: 2320 ret = -ESTRPIPE; 2321 goto __end; 2322 default: 2323 ret = -EBADFD; 2324 goto __end; 2325 } 2326 2327 avail = snd_pcm_playback_avail(runtime); 2328 if (avail <= 0) { 2329 ret = 0; 2330 goto __end; 2331 } 2332 if (frames > (snd_pcm_uframes_t)avail) 2333 frames = avail; 2334 appl_ptr = runtime->control->appl_ptr + frames; 2335 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) 2336 appl_ptr -= runtime->boundary; 2337 runtime->control->appl_ptr = appl_ptr; 2338 ret = frames; 2339 __end: 2340 snd_pcm_stream_unlock_irq(substream); 2341 return ret; 2342 } 2343 2344 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream, 2345 snd_pcm_uframes_t frames) 2346 { 2347 struct snd_pcm_runtime *runtime = substream->runtime; 2348 snd_pcm_sframes_t appl_ptr; 2349 snd_pcm_sframes_t ret; 2350 snd_pcm_sframes_t avail; 2351 2352 if (frames == 0) 2353 return 0; 2354 2355 snd_pcm_stream_lock_irq(substream); 2356 switch (runtime->status->state) { 2357 case SNDRV_PCM_STATE_PREPARED: 2358 case SNDRV_PCM_STATE_DRAINING: 2359 case SNDRV_PCM_STATE_PAUSED: 2360 break; 2361 case SNDRV_PCM_STATE_RUNNING: 2362 if (snd_pcm_update_hw_ptr(substream) >= 0) 2363 break; 2364 /* Fall through */ 2365 case SNDRV_PCM_STATE_XRUN: 2366 ret = -EPIPE; 2367 goto __end; 2368 case SNDRV_PCM_STATE_SUSPENDED: 2369 ret = -ESTRPIPE; 2370 goto __end; 2371 default: 2372 ret = -EBADFD; 2373 goto __end; 2374 } 2375 2376 avail = snd_pcm_capture_avail(runtime); 2377 if (avail <= 0) { 2378 ret = 0; 2379 goto __end; 2380 } 2381 if (frames > (snd_pcm_uframes_t)avail) 2382 frames = avail; 2383 appl_ptr = runtime->control->appl_ptr + frames; 2384 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) 2385 appl_ptr -= runtime->boundary; 2386 runtime->control->appl_ptr = appl_ptr; 2387 ret = frames; 2388 __end: 2389 snd_pcm_stream_unlock_irq(substream); 2390 return ret; 2391 } 2392 2393 static int snd_pcm_hwsync(struct snd_pcm_substream *substream) 2394 { 2395 struct snd_pcm_runtime *runtime = substream->runtime; 2396 int err; 2397 2398 snd_pcm_stream_lock_irq(substream); 2399 switch (runtime->status->state) { 2400 case SNDRV_PCM_STATE_DRAINING: 2401 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 2402 goto __badfd; 2403 case SNDRV_PCM_STATE_RUNNING: 2404 if ((err = snd_pcm_update_hw_ptr(substream)) < 0) 2405 break; 2406 /* Fall through */ 2407 case SNDRV_PCM_STATE_PREPARED: 2408 case SNDRV_PCM_STATE_SUSPENDED: 2409 err = 0; 2410 break; 2411 case SNDRV_PCM_STATE_XRUN: 2412 err = -EPIPE; 2413 break; 2414 default: 2415 __badfd: 2416 err = -EBADFD; 2417 break; 2418 } 2419 snd_pcm_stream_unlock_irq(substream); 2420 return err; 2421 } 2422 2423 static int snd_pcm_delay(struct snd_pcm_substream *substream, 2424 snd_pcm_sframes_t __user *res) 2425 { 2426 struct snd_pcm_runtime *runtime = substream->runtime; 2427 int err; 2428 snd_pcm_sframes_t n = 0; 2429 2430 snd_pcm_stream_lock_irq(substream); 2431 switch (runtime->status->state) { 2432 case SNDRV_PCM_STATE_DRAINING: 2433 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 2434 goto __badfd; 2435 case SNDRV_PCM_STATE_RUNNING: 2436 if ((err = snd_pcm_update_hw_ptr(substream)) < 0) 2437 break; 2438 /* Fall through */ 2439 case SNDRV_PCM_STATE_PREPARED: 2440 case SNDRV_PCM_STATE_SUSPENDED: 2441 err = 0; 2442 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2443 n = snd_pcm_playback_hw_avail(runtime); 2444 else 2445 n = snd_pcm_capture_avail(runtime); 2446 n += runtime->delay; 2447 break; 2448 case SNDRV_PCM_STATE_XRUN: 2449 err = -EPIPE; 2450 break; 2451 default: 2452 __badfd: 2453 err = -EBADFD; 2454 break; 2455 } 2456 snd_pcm_stream_unlock_irq(substream); 2457 if (!err) 2458 if (put_user(n, res)) 2459 err = -EFAULT; 2460 return err; 2461 } 2462 2463 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream, 2464 struct snd_pcm_sync_ptr __user *_sync_ptr) 2465 { 2466 struct snd_pcm_runtime *runtime = substream->runtime; 2467 struct snd_pcm_sync_ptr sync_ptr; 2468 volatile struct snd_pcm_mmap_status *status; 2469 volatile struct snd_pcm_mmap_control *control; 2470 int err; 2471 2472 memset(&sync_ptr, 0, sizeof(sync_ptr)); 2473 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags))) 2474 return -EFAULT; 2475 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control))) 2476 return -EFAULT; 2477 status = runtime->status; 2478 control = runtime->control; 2479 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) { 2480 err = snd_pcm_hwsync(substream); 2481 if (err < 0) 2482 return err; 2483 } 2484 snd_pcm_stream_lock_irq(substream); 2485 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) 2486 control->appl_ptr = sync_ptr.c.control.appl_ptr; 2487 else 2488 sync_ptr.c.control.appl_ptr = control->appl_ptr; 2489 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) 2490 control->avail_min = sync_ptr.c.control.avail_min; 2491 else 2492 sync_ptr.c.control.avail_min = control->avail_min; 2493 sync_ptr.s.status.state = status->state; 2494 sync_ptr.s.status.hw_ptr = status->hw_ptr; 2495 sync_ptr.s.status.tstamp = status->tstamp; 2496 sync_ptr.s.status.suspended_state = status->suspended_state; 2497 snd_pcm_stream_unlock_irq(substream); 2498 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr))) 2499 return -EFAULT; 2500 return 0; 2501 } 2502 2503 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg) 2504 { 2505 struct snd_pcm_runtime *runtime = substream->runtime; 2506 int arg; 2507 2508 if (get_user(arg, _arg)) 2509 return -EFAULT; 2510 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST) 2511 return -EINVAL; 2512 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY; 2513 if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC) 2514 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC; 2515 return 0; 2516 } 2517 2518 static int snd_pcm_common_ioctl1(struct file *file, 2519 struct snd_pcm_substream *substream, 2520 unsigned int cmd, void __user *arg) 2521 { 2522 switch (cmd) { 2523 case SNDRV_PCM_IOCTL_PVERSION: 2524 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0; 2525 case SNDRV_PCM_IOCTL_INFO: 2526 return snd_pcm_info_user(substream, arg); 2527 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */ 2528 return 0; 2529 case SNDRV_PCM_IOCTL_TTSTAMP: 2530 return snd_pcm_tstamp(substream, arg); 2531 case SNDRV_PCM_IOCTL_HW_REFINE: 2532 return snd_pcm_hw_refine_user(substream, arg); 2533 case SNDRV_PCM_IOCTL_HW_PARAMS: 2534 return snd_pcm_hw_params_user(substream, arg); 2535 case SNDRV_PCM_IOCTL_HW_FREE: 2536 return snd_pcm_hw_free(substream); 2537 case SNDRV_PCM_IOCTL_SW_PARAMS: 2538 return snd_pcm_sw_params_user(substream, arg); 2539 case SNDRV_PCM_IOCTL_STATUS: 2540 return snd_pcm_status_user(substream, arg); 2541 case SNDRV_PCM_IOCTL_CHANNEL_INFO: 2542 return snd_pcm_channel_info_user(substream, arg); 2543 case SNDRV_PCM_IOCTL_PREPARE: 2544 return snd_pcm_prepare(substream, file); 2545 case SNDRV_PCM_IOCTL_RESET: 2546 return snd_pcm_reset(substream); 2547 case SNDRV_PCM_IOCTL_START: 2548 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING); 2549 case SNDRV_PCM_IOCTL_LINK: 2550 return snd_pcm_link(substream, (int)(unsigned long) arg); 2551 case SNDRV_PCM_IOCTL_UNLINK: 2552 return snd_pcm_unlink(substream); 2553 case SNDRV_PCM_IOCTL_RESUME: 2554 return snd_pcm_resume(substream); 2555 case SNDRV_PCM_IOCTL_XRUN: 2556 return snd_pcm_xrun(substream); 2557 case SNDRV_PCM_IOCTL_HWSYNC: 2558 return snd_pcm_hwsync(substream); 2559 case SNDRV_PCM_IOCTL_DELAY: 2560 return snd_pcm_delay(substream, arg); 2561 case SNDRV_PCM_IOCTL_SYNC_PTR: 2562 return snd_pcm_sync_ptr(substream, arg); 2563 #ifdef CONFIG_SND_SUPPORT_OLD_API 2564 case SNDRV_PCM_IOCTL_HW_REFINE_OLD: 2565 return snd_pcm_hw_refine_old_user(substream, arg); 2566 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD: 2567 return snd_pcm_hw_params_old_user(substream, arg); 2568 #endif 2569 case SNDRV_PCM_IOCTL_DRAIN: 2570 return snd_pcm_drain(substream, file); 2571 case SNDRV_PCM_IOCTL_DROP: 2572 return snd_pcm_drop(substream); 2573 case SNDRV_PCM_IOCTL_PAUSE: 2574 { 2575 int res; 2576 snd_pcm_stream_lock_irq(substream); 2577 res = snd_pcm_pause(substream, (int)(unsigned long)arg); 2578 snd_pcm_stream_unlock_irq(substream); 2579 return res; 2580 } 2581 } 2582 snd_printd("unknown ioctl = 0x%x\n", cmd); 2583 return -ENOTTY; 2584 } 2585 2586 static int snd_pcm_playback_ioctl1(struct file *file, 2587 struct snd_pcm_substream *substream, 2588 unsigned int cmd, void __user *arg) 2589 { 2590 if (snd_BUG_ON(!substream)) 2591 return -ENXIO; 2592 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) 2593 return -EINVAL; 2594 switch (cmd) { 2595 case SNDRV_PCM_IOCTL_WRITEI_FRAMES: 2596 { 2597 struct snd_xferi xferi; 2598 struct snd_xferi __user *_xferi = arg; 2599 struct snd_pcm_runtime *runtime = substream->runtime; 2600 snd_pcm_sframes_t result; 2601 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2602 return -EBADFD; 2603 if (put_user(0, &_xferi->result)) 2604 return -EFAULT; 2605 if (copy_from_user(&xferi, _xferi, sizeof(xferi))) 2606 return -EFAULT; 2607 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames); 2608 __put_user(result, &_xferi->result); 2609 return result < 0 ? result : 0; 2610 } 2611 case SNDRV_PCM_IOCTL_WRITEN_FRAMES: 2612 { 2613 struct snd_xfern xfern; 2614 struct snd_xfern __user *_xfern = arg; 2615 struct snd_pcm_runtime *runtime = substream->runtime; 2616 void __user **bufs; 2617 snd_pcm_sframes_t result; 2618 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2619 return -EBADFD; 2620 if (runtime->channels > 128) 2621 return -EINVAL; 2622 if (put_user(0, &_xfern->result)) 2623 return -EFAULT; 2624 if (copy_from_user(&xfern, _xfern, sizeof(xfern))) 2625 return -EFAULT; 2626 2627 bufs = memdup_user(xfern.bufs, 2628 sizeof(void *) * runtime->channels); 2629 if (IS_ERR(bufs)) 2630 return PTR_ERR(bufs); 2631 result = snd_pcm_lib_writev(substream, bufs, xfern.frames); 2632 kfree(bufs); 2633 __put_user(result, &_xfern->result); 2634 return result < 0 ? result : 0; 2635 } 2636 case SNDRV_PCM_IOCTL_REWIND: 2637 { 2638 snd_pcm_uframes_t frames; 2639 snd_pcm_uframes_t __user *_frames = arg; 2640 snd_pcm_sframes_t result; 2641 if (get_user(frames, _frames)) 2642 return -EFAULT; 2643 if (put_user(0, _frames)) 2644 return -EFAULT; 2645 result = snd_pcm_playback_rewind(substream, frames); 2646 __put_user(result, _frames); 2647 return result < 0 ? result : 0; 2648 } 2649 case SNDRV_PCM_IOCTL_FORWARD: 2650 { 2651 snd_pcm_uframes_t frames; 2652 snd_pcm_uframes_t __user *_frames = arg; 2653 snd_pcm_sframes_t result; 2654 if (get_user(frames, _frames)) 2655 return -EFAULT; 2656 if (put_user(0, _frames)) 2657 return -EFAULT; 2658 result = snd_pcm_playback_forward(substream, frames); 2659 __put_user(result, _frames); 2660 return result < 0 ? result : 0; 2661 } 2662 } 2663 return snd_pcm_common_ioctl1(file, substream, cmd, arg); 2664 } 2665 2666 static int snd_pcm_capture_ioctl1(struct file *file, 2667 struct snd_pcm_substream *substream, 2668 unsigned int cmd, void __user *arg) 2669 { 2670 if (snd_BUG_ON(!substream)) 2671 return -ENXIO; 2672 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE)) 2673 return -EINVAL; 2674 switch (cmd) { 2675 case SNDRV_PCM_IOCTL_READI_FRAMES: 2676 { 2677 struct snd_xferi xferi; 2678 struct snd_xferi __user *_xferi = arg; 2679 struct snd_pcm_runtime *runtime = substream->runtime; 2680 snd_pcm_sframes_t result; 2681 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2682 return -EBADFD; 2683 if (put_user(0, &_xferi->result)) 2684 return -EFAULT; 2685 if (copy_from_user(&xferi, _xferi, sizeof(xferi))) 2686 return -EFAULT; 2687 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames); 2688 __put_user(result, &_xferi->result); 2689 return result < 0 ? result : 0; 2690 } 2691 case SNDRV_PCM_IOCTL_READN_FRAMES: 2692 { 2693 struct snd_xfern xfern; 2694 struct snd_xfern __user *_xfern = arg; 2695 struct snd_pcm_runtime *runtime = substream->runtime; 2696 void *bufs; 2697 snd_pcm_sframes_t result; 2698 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2699 return -EBADFD; 2700 if (runtime->channels > 128) 2701 return -EINVAL; 2702 if (put_user(0, &_xfern->result)) 2703 return -EFAULT; 2704 if (copy_from_user(&xfern, _xfern, sizeof(xfern))) 2705 return -EFAULT; 2706 2707 bufs = memdup_user(xfern.bufs, 2708 sizeof(void *) * runtime->channels); 2709 if (IS_ERR(bufs)) 2710 return PTR_ERR(bufs); 2711 result = snd_pcm_lib_readv(substream, bufs, xfern.frames); 2712 kfree(bufs); 2713 __put_user(result, &_xfern->result); 2714 return result < 0 ? result : 0; 2715 } 2716 case SNDRV_PCM_IOCTL_REWIND: 2717 { 2718 snd_pcm_uframes_t frames; 2719 snd_pcm_uframes_t __user *_frames = arg; 2720 snd_pcm_sframes_t result; 2721 if (get_user(frames, _frames)) 2722 return -EFAULT; 2723 if (put_user(0, _frames)) 2724 return -EFAULT; 2725 result = snd_pcm_capture_rewind(substream, frames); 2726 __put_user(result, _frames); 2727 return result < 0 ? result : 0; 2728 } 2729 case SNDRV_PCM_IOCTL_FORWARD: 2730 { 2731 snd_pcm_uframes_t frames; 2732 snd_pcm_uframes_t __user *_frames = arg; 2733 snd_pcm_sframes_t result; 2734 if (get_user(frames, _frames)) 2735 return -EFAULT; 2736 if (put_user(0, _frames)) 2737 return -EFAULT; 2738 result = snd_pcm_capture_forward(substream, frames); 2739 __put_user(result, _frames); 2740 return result < 0 ? result : 0; 2741 } 2742 } 2743 return snd_pcm_common_ioctl1(file, substream, cmd, arg); 2744 } 2745 2746 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd, 2747 unsigned long arg) 2748 { 2749 struct snd_pcm_file *pcm_file; 2750 2751 pcm_file = file->private_data; 2752 2753 if (((cmd >> 8) & 0xff) != 'A') 2754 return -ENOTTY; 2755 2756 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd, 2757 (void __user *)arg); 2758 } 2759 2760 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd, 2761 unsigned long arg) 2762 { 2763 struct snd_pcm_file *pcm_file; 2764 2765 pcm_file = file->private_data; 2766 2767 if (((cmd >> 8) & 0xff) != 'A') 2768 return -ENOTTY; 2769 2770 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd, 2771 (void __user *)arg); 2772 } 2773 2774 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, 2775 unsigned int cmd, void *arg) 2776 { 2777 mm_segment_t fs; 2778 int result; 2779 2780 fs = snd_enter_user(); 2781 switch (substream->stream) { 2782 case SNDRV_PCM_STREAM_PLAYBACK: 2783 result = snd_pcm_playback_ioctl1(NULL, substream, cmd, 2784 (void __user *)arg); 2785 break; 2786 case SNDRV_PCM_STREAM_CAPTURE: 2787 result = snd_pcm_capture_ioctl1(NULL, substream, cmd, 2788 (void __user *)arg); 2789 break; 2790 default: 2791 result = -EINVAL; 2792 break; 2793 } 2794 snd_leave_user(fs); 2795 return result; 2796 } 2797 2798 EXPORT_SYMBOL(snd_pcm_kernel_ioctl); 2799 2800 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count, 2801 loff_t * offset) 2802 { 2803 struct snd_pcm_file *pcm_file; 2804 struct snd_pcm_substream *substream; 2805 struct snd_pcm_runtime *runtime; 2806 snd_pcm_sframes_t result; 2807 2808 pcm_file = file->private_data; 2809 substream = pcm_file->substream; 2810 if (PCM_RUNTIME_CHECK(substream)) 2811 return -ENXIO; 2812 runtime = substream->runtime; 2813 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2814 return -EBADFD; 2815 if (!frame_aligned(runtime, count)) 2816 return -EINVAL; 2817 count = bytes_to_frames(runtime, count); 2818 result = snd_pcm_lib_read(substream, buf, count); 2819 if (result > 0) 2820 result = frames_to_bytes(runtime, result); 2821 return result; 2822 } 2823 2824 static ssize_t snd_pcm_write(struct file *file, const char __user *buf, 2825 size_t count, loff_t * offset) 2826 { 2827 struct snd_pcm_file *pcm_file; 2828 struct snd_pcm_substream *substream; 2829 struct snd_pcm_runtime *runtime; 2830 snd_pcm_sframes_t result; 2831 2832 pcm_file = file->private_data; 2833 substream = pcm_file->substream; 2834 if (PCM_RUNTIME_CHECK(substream)) 2835 return -ENXIO; 2836 runtime = substream->runtime; 2837 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2838 return -EBADFD; 2839 if (!frame_aligned(runtime, count)) 2840 return -EINVAL; 2841 count = bytes_to_frames(runtime, count); 2842 result = snd_pcm_lib_write(substream, buf, count); 2843 if (result > 0) 2844 result = frames_to_bytes(runtime, result); 2845 return result; 2846 } 2847 2848 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov, 2849 unsigned long nr_segs, loff_t pos) 2850 2851 { 2852 struct snd_pcm_file *pcm_file; 2853 struct snd_pcm_substream *substream; 2854 struct snd_pcm_runtime *runtime; 2855 snd_pcm_sframes_t result; 2856 unsigned long i; 2857 void __user **bufs; 2858 snd_pcm_uframes_t frames; 2859 2860 pcm_file = iocb->ki_filp->private_data; 2861 substream = pcm_file->substream; 2862 if (PCM_RUNTIME_CHECK(substream)) 2863 return -ENXIO; 2864 runtime = substream->runtime; 2865 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2866 return -EBADFD; 2867 if (nr_segs > 1024 || nr_segs != runtime->channels) 2868 return -EINVAL; 2869 if (!frame_aligned(runtime, iov->iov_len)) 2870 return -EINVAL; 2871 frames = bytes_to_samples(runtime, iov->iov_len); 2872 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL); 2873 if (bufs == NULL) 2874 return -ENOMEM; 2875 for (i = 0; i < nr_segs; ++i) 2876 bufs[i] = iov[i].iov_base; 2877 result = snd_pcm_lib_readv(substream, bufs, frames); 2878 if (result > 0) 2879 result = frames_to_bytes(runtime, result); 2880 kfree(bufs); 2881 return result; 2882 } 2883 2884 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov, 2885 unsigned long nr_segs, loff_t pos) 2886 { 2887 struct snd_pcm_file *pcm_file; 2888 struct snd_pcm_substream *substream; 2889 struct snd_pcm_runtime *runtime; 2890 snd_pcm_sframes_t result; 2891 unsigned long i; 2892 void __user **bufs; 2893 snd_pcm_uframes_t frames; 2894 2895 pcm_file = iocb->ki_filp->private_data; 2896 substream = pcm_file->substream; 2897 if (PCM_RUNTIME_CHECK(substream)) 2898 return -ENXIO; 2899 runtime = substream->runtime; 2900 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2901 return -EBADFD; 2902 if (nr_segs > 128 || nr_segs != runtime->channels || 2903 !frame_aligned(runtime, iov->iov_len)) 2904 return -EINVAL; 2905 frames = bytes_to_samples(runtime, iov->iov_len); 2906 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL); 2907 if (bufs == NULL) 2908 return -ENOMEM; 2909 for (i = 0; i < nr_segs; ++i) 2910 bufs[i] = iov[i].iov_base; 2911 result = snd_pcm_lib_writev(substream, bufs, frames); 2912 if (result > 0) 2913 result = frames_to_bytes(runtime, result); 2914 kfree(bufs); 2915 return result; 2916 } 2917 2918 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait) 2919 { 2920 struct snd_pcm_file *pcm_file; 2921 struct snd_pcm_substream *substream; 2922 struct snd_pcm_runtime *runtime; 2923 unsigned int mask; 2924 snd_pcm_uframes_t avail; 2925 2926 pcm_file = file->private_data; 2927 2928 substream = pcm_file->substream; 2929 if (PCM_RUNTIME_CHECK(substream)) 2930 return -ENXIO; 2931 runtime = substream->runtime; 2932 2933 poll_wait(file, &runtime->sleep, wait); 2934 2935 snd_pcm_stream_lock_irq(substream); 2936 avail = snd_pcm_playback_avail(runtime); 2937 switch (runtime->status->state) { 2938 case SNDRV_PCM_STATE_RUNNING: 2939 case SNDRV_PCM_STATE_PREPARED: 2940 case SNDRV_PCM_STATE_PAUSED: 2941 if (avail >= runtime->control->avail_min) { 2942 mask = POLLOUT | POLLWRNORM; 2943 break; 2944 } 2945 /* Fall through */ 2946 case SNDRV_PCM_STATE_DRAINING: 2947 mask = 0; 2948 break; 2949 default: 2950 mask = POLLOUT | POLLWRNORM | POLLERR; 2951 break; 2952 } 2953 snd_pcm_stream_unlock_irq(substream); 2954 return mask; 2955 } 2956 2957 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait) 2958 { 2959 struct snd_pcm_file *pcm_file; 2960 struct snd_pcm_substream *substream; 2961 struct snd_pcm_runtime *runtime; 2962 unsigned int mask; 2963 snd_pcm_uframes_t avail; 2964 2965 pcm_file = file->private_data; 2966 2967 substream = pcm_file->substream; 2968 if (PCM_RUNTIME_CHECK(substream)) 2969 return -ENXIO; 2970 runtime = substream->runtime; 2971 2972 poll_wait(file, &runtime->sleep, wait); 2973 2974 snd_pcm_stream_lock_irq(substream); 2975 avail = snd_pcm_capture_avail(runtime); 2976 switch (runtime->status->state) { 2977 case SNDRV_PCM_STATE_RUNNING: 2978 case SNDRV_PCM_STATE_PREPARED: 2979 case SNDRV_PCM_STATE_PAUSED: 2980 if (avail >= runtime->control->avail_min) { 2981 mask = POLLIN | POLLRDNORM; 2982 break; 2983 } 2984 mask = 0; 2985 break; 2986 case SNDRV_PCM_STATE_DRAINING: 2987 if (avail > 0) { 2988 mask = POLLIN | POLLRDNORM; 2989 break; 2990 } 2991 /* Fall through */ 2992 default: 2993 mask = POLLIN | POLLRDNORM | POLLERR; 2994 break; 2995 } 2996 snd_pcm_stream_unlock_irq(substream); 2997 return mask; 2998 } 2999 3000 /* 3001 * mmap support 3002 */ 3003 3004 /* 3005 * Only on coherent architectures, we can mmap the status and the control records 3006 * for effcient data transfer. On others, we have to use HWSYNC ioctl... 3007 */ 3008 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) 3009 /* 3010 * mmap status record 3011 */ 3012 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area, 3013 struct vm_fault *vmf) 3014 { 3015 struct snd_pcm_substream *substream = area->vm_private_data; 3016 struct snd_pcm_runtime *runtime; 3017 3018 if (substream == NULL) 3019 return VM_FAULT_SIGBUS; 3020 runtime = substream->runtime; 3021 vmf->page = virt_to_page(runtime->status); 3022 get_page(vmf->page); 3023 return 0; 3024 } 3025 3026 static const struct vm_operations_struct snd_pcm_vm_ops_status = 3027 { 3028 .fault = snd_pcm_mmap_status_fault, 3029 }; 3030 3031 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, 3032 struct vm_area_struct *area) 3033 { 3034 long size; 3035 if (!(area->vm_flags & VM_READ)) 3036 return -EINVAL; 3037 size = area->vm_end - area->vm_start; 3038 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))) 3039 return -EINVAL; 3040 area->vm_ops = &snd_pcm_vm_ops_status; 3041 area->vm_private_data = substream; 3042 area->vm_flags |= VM_RESERVED; 3043 return 0; 3044 } 3045 3046 /* 3047 * mmap control record 3048 */ 3049 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area, 3050 struct vm_fault *vmf) 3051 { 3052 struct snd_pcm_substream *substream = area->vm_private_data; 3053 struct snd_pcm_runtime *runtime; 3054 3055 if (substream == NULL) 3056 return VM_FAULT_SIGBUS; 3057 runtime = substream->runtime; 3058 vmf->page = virt_to_page(runtime->control); 3059 get_page(vmf->page); 3060 return 0; 3061 } 3062 3063 static const struct vm_operations_struct snd_pcm_vm_ops_control = 3064 { 3065 .fault = snd_pcm_mmap_control_fault, 3066 }; 3067 3068 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, 3069 struct vm_area_struct *area) 3070 { 3071 long size; 3072 if (!(area->vm_flags & VM_READ)) 3073 return -EINVAL; 3074 size = area->vm_end - area->vm_start; 3075 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))) 3076 return -EINVAL; 3077 area->vm_ops = &snd_pcm_vm_ops_control; 3078 area->vm_private_data = substream; 3079 area->vm_flags |= VM_RESERVED; 3080 return 0; 3081 } 3082 #else /* ! coherent mmap */ 3083 /* 3084 * don't support mmap for status and control records. 3085 */ 3086 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, 3087 struct vm_area_struct *area) 3088 { 3089 return -ENXIO; 3090 } 3091 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, 3092 struct vm_area_struct *area) 3093 { 3094 return -ENXIO; 3095 } 3096 #endif /* coherent mmap */ 3097 3098 static inline struct page * 3099 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs) 3100 { 3101 void *vaddr = substream->runtime->dma_area + ofs; 3102 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT) 3103 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) 3104 return virt_to_page(CAC_ADDR(vaddr)); 3105 #endif 3106 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE) 3107 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) { 3108 dma_addr_t addr = substream->runtime->dma_addr + ofs; 3109 addr -= get_dma_offset(substream->dma_buffer.dev.dev); 3110 /* assume dma_handle set via pfn_to_phys() in 3111 * mm/dma-noncoherent.c 3112 */ 3113 return pfn_to_page(addr >> PAGE_SHIFT); 3114 } 3115 #endif 3116 return virt_to_page(vaddr); 3117 } 3118 3119 /* 3120 * fault callback for mmapping a RAM page 3121 */ 3122 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area, 3123 struct vm_fault *vmf) 3124 { 3125 struct snd_pcm_substream *substream = area->vm_private_data; 3126 struct snd_pcm_runtime *runtime; 3127 unsigned long offset; 3128 struct page * page; 3129 size_t dma_bytes; 3130 3131 if (substream == NULL) 3132 return VM_FAULT_SIGBUS; 3133 runtime = substream->runtime; 3134 offset = vmf->pgoff << PAGE_SHIFT; 3135 dma_bytes = PAGE_ALIGN(runtime->dma_bytes); 3136 if (offset > dma_bytes - PAGE_SIZE) 3137 return VM_FAULT_SIGBUS; 3138 if (substream->ops->page) 3139 page = substream->ops->page(substream, offset); 3140 else 3141 page = snd_pcm_default_page_ops(substream, offset); 3142 if (!page) 3143 return VM_FAULT_SIGBUS; 3144 get_page(page); 3145 vmf->page = page; 3146 return 0; 3147 } 3148 3149 static const struct vm_operations_struct snd_pcm_vm_ops_data = { 3150 .open = snd_pcm_mmap_data_open, 3151 .close = snd_pcm_mmap_data_close, 3152 }; 3153 3154 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = { 3155 .open = snd_pcm_mmap_data_open, 3156 .close = snd_pcm_mmap_data_close, 3157 .fault = snd_pcm_mmap_data_fault, 3158 }; 3159 3160 #ifndef ARCH_HAS_DMA_MMAP_COHERENT 3161 /* This should be defined / handled globally! */ 3162 #ifdef CONFIG_ARM 3163 #define ARCH_HAS_DMA_MMAP_COHERENT 3164 #endif 3165 #endif 3166 3167 /* 3168 * mmap the DMA buffer on RAM 3169 */ 3170 int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream, 3171 struct vm_area_struct *area) 3172 { 3173 area->vm_flags |= VM_RESERVED; 3174 #ifdef ARCH_HAS_DMA_MMAP_COHERENT 3175 if (!substream->ops->page && 3176 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) 3177 return dma_mmap_coherent(substream->dma_buffer.dev.dev, 3178 area, 3179 substream->runtime->dma_area, 3180 substream->runtime->dma_addr, 3181 area->vm_end - area->vm_start); 3182 #elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT) 3183 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV && 3184 !plat_device_is_coherent(substream->dma_buffer.dev.dev)) 3185 area->vm_page_prot = pgprot_noncached(area->vm_page_prot); 3186 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */ 3187 /* mmap with fault handler */ 3188 area->vm_ops = &snd_pcm_vm_ops_data_fault; 3189 return 0; 3190 } 3191 EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap); 3192 3193 /* 3194 * mmap the DMA buffer on I/O memory area 3195 */ 3196 #if SNDRV_PCM_INFO_MMAP_IOMEM 3197 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, 3198 struct vm_area_struct *area) 3199 { 3200 long size; 3201 unsigned long offset; 3202 3203 area->vm_page_prot = pgprot_noncached(area->vm_page_prot); 3204 area->vm_flags |= VM_IO; 3205 size = area->vm_end - area->vm_start; 3206 offset = area->vm_pgoff << PAGE_SHIFT; 3207 if (io_remap_pfn_range(area, area->vm_start, 3208 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT, 3209 size, area->vm_page_prot)) 3210 return -EAGAIN; 3211 return 0; 3212 } 3213 3214 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem); 3215 #endif /* SNDRV_PCM_INFO_MMAP */ 3216 3217 /* 3218 * mmap DMA buffer 3219 */ 3220 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, 3221 struct vm_area_struct *area) 3222 { 3223 struct snd_pcm_runtime *runtime; 3224 long size; 3225 unsigned long offset; 3226 size_t dma_bytes; 3227 int err; 3228 3229 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 3230 if (!(area->vm_flags & (VM_WRITE|VM_READ))) 3231 return -EINVAL; 3232 } else { 3233 if (!(area->vm_flags & VM_READ)) 3234 return -EINVAL; 3235 } 3236 runtime = substream->runtime; 3237 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 3238 return -EBADFD; 3239 if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) 3240 return -ENXIO; 3241 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || 3242 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) 3243 return -EINVAL; 3244 size = area->vm_end - area->vm_start; 3245 offset = area->vm_pgoff << PAGE_SHIFT; 3246 dma_bytes = PAGE_ALIGN(runtime->dma_bytes); 3247 if ((size_t)size > dma_bytes) 3248 return -EINVAL; 3249 if (offset > dma_bytes - size) 3250 return -EINVAL; 3251 3252 area->vm_ops = &snd_pcm_vm_ops_data; 3253 area->vm_private_data = substream; 3254 if (substream->ops->mmap) 3255 err = substream->ops->mmap(substream, area); 3256 else 3257 err = snd_pcm_lib_default_mmap(substream, area); 3258 if (!err) 3259 atomic_inc(&substream->mmap_count); 3260 return err; 3261 } 3262 3263 EXPORT_SYMBOL(snd_pcm_mmap_data); 3264 3265 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area) 3266 { 3267 struct snd_pcm_file * pcm_file; 3268 struct snd_pcm_substream *substream; 3269 unsigned long offset; 3270 3271 pcm_file = file->private_data; 3272 substream = pcm_file->substream; 3273 if (PCM_RUNTIME_CHECK(substream)) 3274 return -ENXIO; 3275 3276 offset = area->vm_pgoff << PAGE_SHIFT; 3277 switch (offset) { 3278 case SNDRV_PCM_MMAP_OFFSET_STATUS: 3279 if (pcm_file->no_compat_mmap) 3280 return -ENXIO; 3281 return snd_pcm_mmap_status(substream, file, area); 3282 case SNDRV_PCM_MMAP_OFFSET_CONTROL: 3283 if (pcm_file->no_compat_mmap) 3284 return -ENXIO; 3285 return snd_pcm_mmap_control(substream, file, area); 3286 default: 3287 return snd_pcm_mmap_data(substream, file, area); 3288 } 3289 return 0; 3290 } 3291 3292 static int snd_pcm_fasync(int fd, struct file * file, int on) 3293 { 3294 struct snd_pcm_file * pcm_file; 3295 struct snd_pcm_substream *substream; 3296 struct snd_pcm_runtime *runtime; 3297 3298 pcm_file = file->private_data; 3299 substream = pcm_file->substream; 3300 if (PCM_RUNTIME_CHECK(substream)) 3301 return -ENXIO; 3302 runtime = substream->runtime; 3303 return fasync_helper(fd, file, on, &runtime->fasync); 3304 } 3305 3306 /* 3307 * ioctl32 compat 3308 */ 3309 #ifdef CONFIG_COMPAT 3310 #include "pcm_compat.c" 3311 #else 3312 #define snd_pcm_ioctl_compat NULL 3313 #endif 3314 3315 /* 3316 * To be removed helpers to keep binary compatibility 3317 */ 3318 3319 #ifdef CONFIG_SND_SUPPORT_OLD_API 3320 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5)) 3321 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5)) 3322 3323 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params, 3324 struct snd_pcm_hw_params_old *oparams) 3325 { 3326 unsigned int i; 3327 3328 memset(params, 0, sizeof(*params)); 3329 params->flags = oparams->flags; 3330 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) 3331 params->masks[i].bits[0] = oparams->masks[i]; 3332 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals)); 3333 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask); 3334 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask); 3335 params->info = oparams->info; 3336 params->msbits = oparams->msbits; 3337 params->rate_num = oparams->rate_num; 3338 params->rate_den = oparams->rate_den; 3339 params->fifo_size = oparams->fifo_size; 3340 } 3341 3342 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams, 3343 struct snd_pcm_hw_params *params) 3344 { 3345 unsigned int i; 3346 3347 memset(oparams, 0, sizeof(*oparams)); 3348 oparams->flags = params->flags; 3349 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) 3350 oparams->masks[i] = params->masks[i].bits[0]; 3351 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals)); 3352 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask); 3353 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask); 3354 oparams->info = params->info; 3355 oparams->msbits = params->msbits; 3356 oparams->rate_num = params->rate_num; 3357 oparams->rate_den = params->rate_den; 3358 oparams->fifo_size = params->fifo_size; 3359 } 3360 3361 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, 3362 struct snd_pcm_hw_params_old __user * _oparams) 3363 { 3364 struct snd_pcm_hw_params *params; 3365 struct snd_pcm_hw_params_old *oparams = NULL; 3366 int err; 3367 3368 params = kmalloc(sizeof(*params), GFP_KERNEL); 3369 if (!params) 3370 return -ENOMEM; 3371 3372 oparams = memdup_user(_oparams, sizeof(*oparams)); 3373 if (IS_ERR(oparams)) { 3374 err = PTR_ERR(oparams); 3375 goto out; 3376 } 3377 snd_pcm_hw_convert_from_old_params(params, oparams); 3378 err = snd_pcm_hw_refine(substream, params); 3379 snd_pcm_hw_convert_to_old_params(oparams, params); 3380 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { 3381 if (!err) 3382 err = -EFAULT; 3383 } 3384 3385 kfree(oparams); 3386 out: 3387 kfree(params); 3388 return err; 3389 } 3390 3391 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, 3392 struct snd_pcm_hw_params_old __user * _oparams) 3393 { 3394 struct snd_pcm_hw_params *params; 3395 struct snd_pcm_hw_params_old *oparams = NULL; 3396 int err; 3397 3398 params = kmalloc(sizeof(*params), GFP_KERNEL); 3399 if (!params) 3400 return -ENOMEM; 3401 3402 oparams = memdup_user(_oparams, sizeof(*oparams)); 3403 if (IS_ERR(oparams)) { 3404 err = PTR_ERR(oparams); 3405 goto out; 3406 } 3407 snd_pcm_hw_convert_from_old_params(params, oparams); 3408 err = snd_pcm_hw_params(substream, params); 3409 snd_pcm_hw_convert_to_old_params(oparams, params); 3410 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { 3411 if (!err) 3412 err = -EFAULT; 3413 } 3414 3415 kfree(oparams); 3416 out: 3417 kfree(params); 3418 return err; 3419 } 3420 #endif /* CONFIG_SND_SUPPORT_OLD_API */ 3421 3422 #ifndef CONFIG_MMU 3423 static unsigned long snd_pcm_get_unmapped_area(struct file *file, 3424 unsigned long addr, 3425 unsigned long len, 3426 unsigned long pgoff, 3427 unsigned long flags) 3428 { 3429 struct snd_pcm_file *pcm_file = file->private_data; 3430 struct snd_pcm_substream *substream = pcm_file->substream; 3431 struct snd_pcm_runtime *runtime = substream->runtime; 3432 unsigned long offset = pgoff << PAGE_SHIFT; 3433 3434 switch (offset) { 3435 case SNDRV_PCM_MMAP_OFFSET_STATUS: 3436 return (unsigned long)runtime->status; 3437 case SNDRV_PCM_MMAP_OFFSET_CONTROL: 3438 return (unsigned long)runtime->control; 3439 default: 3440 return (unsigned long)runtime->dma_area + offset; 3441 } 3442 } 3443 #else 3444 # define snd_pcm_get_unmapped_area NULL 3445 #endif 3446 3447 /* 3448 * Register section 3449 */ 3450 3451 const struct file_operations snd_pcm_f_ops[2] = { 3452 { 3453 .owner = THIS_MODULE, 3454 .write = snd_pcm_write, 3455 .aio_write = snd_pcm_aio_write, 3456 .open = snd_pcm_playback_open, 3457 .release = snd_pcm_release, 3458 .llseek = no_llseek, 3459 .poll = snd_pcm_playback_poll, 3460 .unlocked_ioctl = snd_pcm_playback_ioctl, 3461 .compat_ioctl = snd_pcm_ioctl_compat, 3462 .mmap = snd_pcm_mmap, 3463 .fasync = snd_pcm_fasync, 3464 .get_unmapped_area = snd_pcm_get_unmapped_area, 3465 }, 3466 { 3467 .owner = THIS_MODULE, 3468 .read = snd_pcm_read, 3469 .aio_read = snd_pcm_aio_read, 3470 .open = snd_pcm_capture_open, 3471 .release = snd_pcm_release, 3472 .llseek = no_llseek, 3473 .poll = snd_pcm_capture_poll, 3474 .unlocked_ioctl = snd_pcm_capture_ioctl, 3475 .compat_ioctl = snd_pcm_ioctl_compat, 3476 .mmap = snd_pcm_mmap, 3477 .fasync = snd_pcm_fasync, 3478 .get_unmapped_area = snd_pcm_get_unmapped_area, 3479 } 3480 }; 3481