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