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 static int snd_pcm_drop(struct snd_pcm_substream *substream); 1391 1392 /* 1393 * Drain the stream(s). 1394 * When the substream is linked, sync until the draining of all playback streams 1395 * is finished. 1396 * After this call, all streams are supposed to be either SETUP or DRAINING 1397 * (capture only) state. 1398 */ 1399 static int snd_pcm_drain(struct snd_pcm_substream *substream, 1400 struct file *file) 1401 { 1402 struct snd_card *card; 1403 struct snd_pcm_runtime *runtime; 1404 struct snd_pcm_substream *s; 1405 wait_queue_t wait; 1406 int result = 0; 1407 int nonblock = 0; 1408 1409 card = substream->pcm->card; 1410 runtime = substream->runtime; 1411 1412 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 1413 return -EBADFD; 1414 1415 snd_power_lock(card); 1416 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1417 result = snd_power_wait(card, SNDRV_CTL_POWER_D0); 1418 if (result < 0) { 1419 snd_power_unlock(card); 1420 return result; 1421 } 1422 } 1423 1424 if (file) { 1425 if (file->f_flags & O_NONBLOCK) 1426 nonblock = 1; 1427 } else if (substream->f_flags & O_NONBLOCK) 1428 nonblock = 1; 1429 1430 down_read(&snd_pcm_link_rwsem); 1431 snd_pcm_stream_lock_irq(substream); 1432 /* resume pause */ 1433 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) 1434 snd_pcm_pause(substream, 0); 1435 1436 /* pre-start/stop - all running streams are changed to DRAINING state */ 1437 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0); 1438 if (result < 0) 1439 goto unlock; 1440 /* in non-blocking, we don't wait in ioctl but let caller poll */ 1441 if (nonblock) { 1442 result = -EAGAIN; 1443 goto unlock; 1444 } 1445 1446 for (;;) { 1447 long tout; 1448 struct snd_pcm_runtime *to_check; 1449 if (signal_pending(current)) { 1450 result = -ERESTARTSYS; 1451 break; 1452 } 1453 /* find a substream to drain */ 1454 to_check = NULL; 1455 snd_pcm_group_for_each_entry(s, substream) { 1456 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK) 1457 continue; 1458 runtime = s->runtime; 1459 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 1460 to_check = runtime; 1461 break; 1462 } 1463 } 1464 if (!to_check) 1465 break; /* all drained */ 1466 init_waitqueue_entry(&wait, current); 1467 add_wait_queue(&to_check->sleep, &wait); 1468 set_current_state(TASK_INTERRUPTIBLE); 1469 snd_pcm_stream_unlock_irq(substream); 1470 up_read(&snd_pcm_link_rwsem); 1471 snd_power_unlock(card); 1472 tout = schedule_timeout(10 * HZ); 1473 snd_power_lock(card); 1474 down_read(&snd_pcm_link_rwsem); 1475 snd_pcm_stream_lock_irq(substream); 1476 remove_wait_queue(&to_check->sleep, &wait); 1477 if (tout == 0) { 1478 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1479 result = -ESTRPIPE; 1480 else { 1481 snd_printd("playback drain error (DMA or IRQ trouble?)\n"); 1482 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1483 result = -EIO; 1484 } 1485 break; 1486 } 1487 } 1488 1489 unlock: 1490 snd_pcm_stream_unlock_irq(substream); 1491 up_read(&snd_pcm_link_rwsem); 1492 snd_power_unlock(card); 1493 1494 return result; 1495 } 1496 1497 /* 1498 * drop ioctl 1499 * 1500 * Immediately put all linked substreams into SETUP state. 1501 */ 1502 static int snd_pcm_drop(struct snd_pcm_substream *substream) 1503 { 1504 struct snd_pcm_runtime *runtime; 1505 struct snd_card *card; 1506 int result = 0; 1507 1508 if (PCM_RUNTIME_CHECK(substream)) 1509 return -ENXIO; 1510 runtime = substream->runtime; 1511 card = substream->pcm->card; 1512 1513 if (runtime->status->state == SNDRV_PCM_STATE_OPEN || 1514 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED || 1515 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1516 return -EBADFD; 1517 1518 snd_pcm_stream_lock_irq(substream); 1519 /* resume pause */ 1520 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) 1521 snd_pcm_pause(substream, 0); 1522 1523 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1524 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */ 1525 snd_pcm_stream_unlock_irq(substream); 1526 1527 return result; 1528 } 1529 1530 1531 /* WARNING: Don't forget to fput back the file */ 1532 static struct file *snd_pcm_file_fd(int fd) 1533 { 1534 struct file *file; 1535 struct inode *inode; 1536 unsigned int minor; 1537 1538 file = fget(fd); 1539 if (!file) 1540 return NULL; 1541 inode = file->f_path.dentry->d_inode; 1542 if (!S_ISCHR(inode->i_mode) || 1543 imajor(inode) != snd_major) { 1544 fput(file); 1545 return NULL; 1546 } 1547 minor = iminor(inode); 1548 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) && 1549 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) { 1550 fput(file); 1551 return NULL; 1552 } 1553 return file; 1554 } 1555 1556 /* 1557 * PCM link handling 1558 */ 1559 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd) 1560 { 1561 int res = 0; 1562 struct file *file; 1563 struct snd_pcm_file *pcm_file; 1564 struct snd_pcm_substream *substream1; 1565 1566 file = snd_pcm_file_fd(fd); 1567 if (!file) 1568 return -EBADFD; 1569 pcm_file = file->private_data; 1570 substream1 = pcm_file->substream; 1571 down_write(&snd_pcm_link_rwsem); 1572 write_lock_irq(&snd_pcm_link_rwlock); 1573 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN || 1574 substream->runtime->status->state != substream1->runtime->status->state) { 1575 res = -EBADFD; 1576 goto _end; 1577 } 1578 if (snd_pcm_stream_linked(substream1)) { 1579 res = -EALREADY; 1580 goto _end; 1581 } 1582 if (!snd_pcm_stream_linked(substream)) { 1583 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC); 1584 if (substream->group == NULL) { 1585 res = -ENOMEM; 1586 goto _end; 1587 } 1588 spin_lock_init(&substream->group->lock); 1589 INIT_LIST_HEAD(&substream->group->substreams); 1590 list_add_tail(&substream->link_list, &substream->group->substreams); 1591 substream->group->count = 1; 1592 } 1593 list_add_tail(&substream1->link_list, &substream->group->substreams); 1594 substream->group->count++; 1595 substream1->group = substream->group; 1596 _end: 1597 write_unlock_irq(&snd_pcm_link_rwlock); 1598 up_write(&snd_pcm_link_rwsem); 1599 fput(file); 1600 return res; 1601 } 1602 1603 static void relink_to_local(struct snd_pcm_substream *substream) 1604 { 1605 substream->group = &substream->self_group; 1606 INIT_LIST_HEAD(&substream->self_group.substreams); 1607 list_add_tail(&substream->link_list, &substream->self_group.substreams); 1608 } 1609 1610 static int snd_pcm_unlink(struct snd_pcm_substream *substream) 1611 { 1612 struct snd_pcm_substream *s; 1613 int res = 0; 1614 1615 down_write(&snd_pcm_link_rwsem); 1616 write_lock_irq(&snd_pcm_link_rwlock); 1617 if (!snd_pcm_stream_linked(substream)) { 1618 res = -EALREADY; 1619 goto _end; 1620 } 1621 list_del(&substream->link_list); 1622 substream->group->count--; 1623 if (substream->group->count == 1) { /* detach the last stream, too */ 1624 snd_pcm_group_for_each_entry(s, substream) { 1625 relink_to_local(s); 1626 break; 1627 } 1628 kfree(substream->group); 1629 } 1630 relink_to_local(substream); 1631 _end: 1632 write_unlock_irq(&snd_pcm_link_rwlock); 1633 up_write(&snd_pcm_link_rwsem); 1634 return res; 1635 } 1636 1637 /* 1638 * hw configurator 1639 */ 1640 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params, 1641 struct snd_pcm_hw_rule *rule) 1642 { 1643 struct snd_interval t; 1644 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]), 1645 hw_param_interval_c(params, rule->deps[1]), &t); 1646 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1647 } 1648 1649 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params, 1650 struct snd_pcm_hw_rule *rule) 1651 { 1652 struct snd_interval t; 1653 snd_interval_div(hw_param_interval_c(params, rule->deps[0]), 1654 hw_param_interval_c(params, rule->deps[1]), &t); 1655 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1656 } 1657 1658 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params, 1659 struct snd_pcm_hw_rule *rule) 1660 { 1661 struct snd_interval t; 1662 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]), 1663 hw_param_interval_c(params, rule->deps[1]), 1664 (unsigned long) rule->private, &t); 1665 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1666 } 1667 1668 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params, 1669 struct snd_pcm_hw_rule *rule) 1670 { 1671 struct snd_interval t; 1672 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]), 1673 (unsigned long) rule->private, 1674 hw_param_interval_c(params, rule->deps[1]), &t); 1675 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1676 } 1677 1678 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params, 1679 struct snd_pcm_hw_rule *rule) 1680 { 1681 unsigned int k; 1682 struct snd_interval *i = hw_param_interval(params, rule->deps[0]); 1683 struct snd_mask m; 1684 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 1685 snd_mask_any(&m); 1686 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { 1687 int bits; 1688 if (! snd_mask_test(mask, k)) 1689 continue; 1690 bits = snd_pcm_format_physical_width(k); 1691 if (bits <= 0) 1692 continue; /* ignore invalid formats */ 1693 if ((unsigned)bits < i->min || (unsigned)bits > i->max) 1694 snd_mask_reset(&m, k); 1695 } 1696 return snd_mask_refine(mask, &m); 1697 } 1698 1699 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params, 1700 struct snd_pcm_hw_rule *rule) 1701 { 1702 struct snd_interval t; 1703 unsigned int k; 1704 t.min = UINT_MAX; 1705 t.max = 0; 1706 t.openmin = 0; 1707 t.openmax = 0; 1708 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { 1709 int bits; 1710 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k)) 1711 continue; 1712 bits = snd_pcm_format_physical_width(k); 1713 if (bits <= 0) 1714 continue; /* ignore invalid formats */ 1715 if (t.min > (unsigned)bits) 1716 t.min = bits; 1717 if (t.max < (unsigned)bits) 1718 t.max = bits; 1719 } 1720 t.integer = 1; 1721 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1722 } 1723 1724 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12 1725 #error "Change this table" 1726 #endif 1727 1728 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100, 1729 48000, 64000, 88200, 96000, 176400, 192000 }; 1730 1731 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = { 1732 .count = ARRAY_SIZE(rates), 1733 .list = rates, 1734 }; 1735 1736 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params, 1737 struct snd_pcm_hw_rule *rule) 1738 { 1739 struct snd_pcm_hardware *hw = rule->private; 1740 return snd_interval_list(hw_param_interval(params, rule->var), 1741 snd_pcm_known_rates.count, 1742 snd_pcm_known_rates.list, hw->rates); 1743 } 1744 1745 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params, 1746 struct snd_pcm_hw_rule *rule) 1747 { 1748 struct snd_interval t; 1749 struct snd_pcm_substream *substream = rule->private; 1750 t.min = 0; 1751 t.max = substream->buffer_bytes_max; 1752 t.openmin = 0; 1753 t.openmax = 0; 1754 t.integer = 1; 1755 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1756 } 1757 1758 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream) 1759 { 1760 struct snd_pcm_runtime *runtime = substream->runtime; 1761 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; 1762 int k, err; 1763 1764 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { 1765 snd_mask_any(constrs_mask(constrs, k)); 1766 } 1767 1768 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { 1769 snd_interval_any(constrs_interval(constrs, k)); 1770 } 1771 1772 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS)); 1773 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)); 1774 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)); 1775 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)); 1776 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS)); 1777 1778 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, 1779 snd_pcm_hw_rule_format, NULL, 1780 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1781 if (err < 0) 1782 return err; 1783 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 1784 snd_pcm_hw_rule_sample_bits, NULL, 1785 SNDRV_PCM_HW_PARAM_FORMAT, 1786 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1787 if (err < 0) 1788 return err; 1789 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 1790 snd_pcm_hw_rule_div, NULL, 1791 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); 1792 if (err < 0) 1793 return err; 1794 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1795 snd_pcm_hw_rule_mul, NULL, 1796 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); 1797 if (err < 0) 1798 return err; 1799 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1800 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1801 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 1802 if (err < 0) 1803 return err; 1804 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1805 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1806 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1); 1807 if (err < 0) 1808 return err; 1809 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 1810 snd_pcm_hw_rule_div, NULL, 1811 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1812 if (err < 0) 1813 return err; 1814 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1815 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1816 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1); 1817 if (err < 0) 1818 return err; 1819 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1820 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1821 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1); 1822 if (err < 0) 1823 return err; 1824 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, 1825 snd_pcm_hw_rule_div, NULL, 1826 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 1827 if (err < 0) 1828 return err; 1829 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1830 snd_pcm_hw_rule_div, NULL, 1831 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); 1832 if (err < 0) 1833 return err; 1834 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1835 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1836 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1837 if (err < 0) 1838 return err; 1839 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1840 snd_pcm_hw_rule_muldivk, (void*) 1000000, 1841 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); 1842 if (err < 0) 1843 return err; 1844 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1845 snd_pcm_hw_rule_mul, NULL, 1846 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); 1847 if (err < 0) 1848 return err; 1849 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1850 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1851 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1852 if (err < 0) 1853 return err; 1854 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1855 snd_pcm_hw_rule_muldivk, (void*) 1000000, 1856 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); 1857 if (err < 0) 1858 return err; 1859 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 1860 snd_pcm_hw_rule_muldivk, (void*) 8, 1861 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1862 if (err < 0) 1863 return err; 1864 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1865 snd_pcm_hw_rule_muldivk, (void*) 8, 1866 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1867 if (err < 0) 1868 return err; 1869 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 1870 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1871 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); 1872 if (err < 0) 1873 return err; 1874 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME, 1875 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1876 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); 1877 if (err < 0) 1878 return err; 1879 return 0; 1880 } 1881 1882 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream) 1883 { 1884 struct snd_pcm_runtime *runtime = substream->runtime; 1885 struct snd_pcm_hardware *hw = &runtime->hw; 1886 int err; 1887 unsigned int mask = 0; 1888 1889 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) 1890 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED; 1891 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) 1892 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED; 1893 if (hw->info & SNDRV_PCM_INFO_MMAP) { 1894 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) 1895 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; 1896 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) 1897 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED; 1898 if (hw->info & SNDRV_PCM_INFO_COMPLEX) 1899 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX; 1900 } 1901 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask); 1902 if (err < 0) 1903 return err; 1904 1905 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats); 1906 if (err < 0) 1907 return err; 1908 1909 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD); 1910 if (err < 0) 1911 return err; 1912 1913 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, 1914 hw->channels_min, hw->channels_max); 1915 if (err < 0) 1916 return err; 1917 1918 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE, 1919 hw->rate_min, hw->rate_max); 1920 if (err < 0) 1921 return err; 1922 1923 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 1924 hw->period_bytes_min, hw->period_bytes_max); 1925 if (err < 0) 1926 return err; 1927 1928 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS, 1929 hw->periods_min, hw->periods_max); 1930 if (err < 0) 1931 return err; 1932 1933 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1934 hw->period_bytes_min, hw->buffer_bytes_max); 1935 if (err < 0) 1936 return err; 1937 1938 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1939 snd_pcm_hw_rule_buffer_bytes_max, substream, 1940 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1); 1941 if (err < 0) 1942 return err; 1943 1944 /* FIXME: remove */ 1945 if (runtime->dma_bytes) { 1946 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes); 1947 if (err < 0) 1948 return -EINVAL; 1949 } 1950 1951 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) { 1952 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1953 snd_pcm_hw_rule_rate, hw, 1954 SNDRV_PCM_HW_PARAM_RATE, -1); 1955 if (err < 0) 1956 return err; 1957 } 1958 1959 /* FIXME: this belong to lowlevel */ 1960 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE); 1961 1962 return 0; 1963 } 1964 1965 static void pcm_release_private(struct snd_pcm_substream *substream) 1966 { 1967 snd_pcm_unlink(substream); 1968 } 1969 1970 void snd_pcm_release_substream(struct snd_pcm_substream *substream) 1971 { 1972 substream->ref_count--; 1973 if (substream->ref_count > 0) 1974 return; 1975 1976 snd_pcm_drop(substream); 1977 if (substream->hw_opened) { 1978 if (substream->ops->hw_free != NULL) 1979 substream->ops->hw_free(substream); 1980 substream->ops->close(substream); 1981 substream->hw_opened = 0; 1982 } 1983 if (substream->pcm_release) { 1984 substream->pcm_release(substream); 1985 substream->pcm_release = NULL; 1986 } 1987 snd_pcm_detach_substream(substream); 1988 } 1989 1990 EXPORT_SYMBOL(snd_pcm_release_substream); 1991 1992 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, 1993 struct file *file, 1994 struct snd_pcm_substream **rsubstream) 1995 { 1996 struct snd_pcm_substream *substream; 1997 int err; 1998 1999 err = snd_pcm_attach_substream(pcm, stream, file, &substream); 2000 if (err < 0) 2001 return err; 2002 if (substream->ref_count > 1) { 2003 *rsubstream = substream; 2004 return 0; 2005 } 2006 2007 err = snd_pcm_hw_constraints_init(substream); 2008 if (err < 0) { 2009 snd_printd("snd_pcm_hw_constraints_init failed\n"); 2010 goto error; 2011 } 2012 2013 if ((err = substream->ops->open(substream)) < 0) 2014 goto error; 2015 2016 substream->hw_opened = 1; 2017 2018 err = snd_pcm_hw_constraints_complete(substream); 2019 if (err < 0) { 2020 snd_printd("snd_pcm_hw_constraints_complete failed\n"); 2021 goto error; 2022 } 2023 2024 *rsubstream = substream; 2025 return 0; 2026 2027 error: 2028 snd_pcm_release_substream(substream); 2029 return err; 2030 } 2031 2032 EXPORT_SYMBOL(snd_pcm_open_substream); 2033 2034 static int snd_pcm_open_file(struct file *file, 2035 struct snd_pcm *pcm, 2036 int stream, 2037 struct snd_pcm_file **rpcm_file) 2038 { 2039 struct snd_pcm_file *pcm_file; 2040 struct snd_pcm_substream *substream; 2041 struct snd_pcm_str *str; 2042 int err; 2043 2044 if (rpcm_file) 2045 *rpcm_file = NULL; 2046 2047 err = snd_pcm_open_substream(pcm, stream, file, &substream); 2048 if (err < 0) 2049 return err; 2050 2051 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL); 2052 if (pcm_file == NULL) { 2053 snd_pcm_release_substream(substream); 2054 return -ENOMEM; 2055 } 2056 pcm_file->substream = substream; 2057 if (substream->ref_count == 1) { 2058 str = substream->pstr; 2059 substream->file = pcm_file; 2060 substream->pcm_release = pcm_release_private; 2061 } 2062 file->private_data = pcm_file; 2063 if (rpcm_file) 2064 *rpcm_file = pcm_file; 2065 return 0; 2066 } 2067 2068 static int snd_pcm_playback_open(struct inode *inode, struct file *file) 2069 { 2070 struct snd_pcm *pcm; 2071 2072 pcm = snd_lookup_minor_data(iminor(inode), 2073 SNDRV_DEVICE_TYPE_PCM_PLAYBACK); 2074 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK); 2075 } 2076 2077 static int snd_pcm_capture_open(struct inode *inode, struct file *file) 2078 { 2079 struct snd_pcm *pcm; 2080 2081 pcm = snd_lookup_minor_data(iminor(inode), 2082 SNDRV_DEVICE_TYPE_PCM_CAPTURE); 2083 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE); 2084 } 2085 2086 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream) 2087 { 2088 int err; 2089 struct snd_pcm_file *pcm_file; 2090 wait_queue_t wait; 2091 2092 if (pcm == NULL) { 2093 err = -ENODEV; 2094 goto __error1; 2095 } 2096 err = snd_card_file_add(pcm->card, file); 2097 if (err < 0) 2098 goto __error1; 2099 if (!try_module_get(pcm->card->module)) { 2100 err = -EFAULT; 2101 goto __error2; 2102 } 2103 init_waitqueue_entry(&wait, current); 2104 add_wait_queue(&pcm->open_wait, &wait); 2105 mutex_lock(&pcm->open_mutex); 2106 while (1) { 2107 err = snd_pcm_open_file(file, pcm, stream, &pcm_file); 2108 if (err >= 0) 2109 break; 2110 if (err == -EAGAIN) { 2111 if (file->f_flags & O_NONBLOCK) { 2112 err = -EBUSY; 2113 break; 2114 } 2115 } else 2116 break; 2117 set_current_state(TASK_INTERRUPTIBLE); 2118 mutex_unlock(&pcm->open_mutex); 2119 schedule(); 2120 mutex_lock(&pcm->open_mutex); 2121 if (signal_pending(current)) { 2122 err = -ERESTARTSYS; 2123 break; 2124 } 2125 } 2126 remove_wait_queue(&pcm->open_wait, &wait); 2127 mutex_unlock(&pcm->open_mutex); 2128 if (err < 0) 2129 goto __error; 2130 return err; 2131 2132 __error: 2133 module_put(pcm->card->module); 2134 __error2: 2135 snd_card_file_remove(pcm->card, file); 2136 __error1: 2137 return err; 2138 } 2139 2140 static int snd_pcm_release(struct inode *inode, struct file *file) 2141 { 2142 struct snd_pcm *pcm; 2143 struct snd_pcm_substream *substream; 2144 struct snd_pcm_file *pcm_file; 2145 2146 pcm_file = file->private_data; 2147 substream = pcm_file->substream; 2148 if (snd_BUG_ON(!substream)) 2149 return -ENXIO; 2150 pcm = substream->pcm; 2151 mutex_lock(&pcm->open_mutex); 2152 snd_pcm_release_substream(substream); 2153 kfree(pcm_file); 2154 mutex_unlock(&pcm->open_mutex); 2155 wake_up(&pcm->open_wait); 2156 module_put(pcm->card->module); 2157 snd_card_file_remove(pcm->card, file); 2158 return 0; 2159 } 2160 2161 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream, 2162 snd_pcm_uframes_t frames) 2163 { 2164 struct snd_pcm_runtime *runtime = substream->runtime; 2165 snd_pcm_sframes_t appl_ptr; 2166 snd_pcm_sframes_t ret; 2167 snd_pcm_sframes_t hw_avail; 2168 2169 if (frames == 0) 2170 return 0; 2171 2172 snd_pcm_stream_lock_irq(substream); 2173 switch (runtime->status->state) { 2174 case SNDRV_PCM_STATE_PREPARED: 2175 break; 2176 case SNDRV_PCM_STATE_DRAINING: 2177 case SNDRV_PCM_STATE_RUNNING: 2178 if (snd_pcm_update_hw_ptr(substream) >= 0) 2179 break; 2180 /* Fall through */ 2181 case SNDRV_PCM_STATE_XRUN: 2182 ret = -EPIPE; 2183 goto __end; 2184 case SNDRV_PCM_STATE_SUSPENDED: 2185 ret = -ESTRPIPE; 2186 goto __end; 2187 default: 2188 ret = -EBADFD; 2189 goto __end; 2190 } 2191 2192 hw_avail = snd_pcm_playback_hw_avail(runtime); 2193 if (hw_avail <= 0) { 2194 ret = 0; 2195 goto __end; 2196 } 2197 if (frames > (snd_pcm_uframes_t)hw_avail) 2198 frames = hw_avail; 2199 appl_ptr = runtime->control->appl_ptr - frames; 2200 if (appl_ptr < 0) 2201 appl_ptr += runtime->boundary; 2202 runtime->control->appl_ptr = appl_ptr; 2203 ret = frames; 2204 __end: 2205 snd_pcm_stream_unlock_irq(substream); 2206 return ret; 2207 } 2208 2209 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream, 2210 snd_pcm_uframes_t frames) 2211 { 2212 struct snd_pcm_runtime *runtime = substream->runtime; 2213 snd_pcm_sframes_t appl_ptr; 2214 snd_pcm_sframes_t ret; 2215 snd_pcm_sframes_t hw_avail; 2216 2217 if (frames == 0) 2218 return 0; 2219 2220 snd_pcm_stream_lock_irq(substream); 2221 switch (runtime->status->state) { 2222 case SNDRV_PCM_STATE_PREPARED: 2223 case SNDRV_PCM_STATE_DRAINING: 2224 break; 2225 case SNDRV_PCM_STATE_RUNNING: 2226 if (snd_pcm_update_hw_ptr(substream) >= 0) 2227 break; 2228 /* Fall through */ 2229 case SNDRV_PCM_STATE_XRUN: 2230 ret = -EPIPE; 2231 goto __end; 2232 case SNDRV_PCM_STATE_SUSPENDED: 2233 ret = -ESTRPIPE; 2234 goto __end; 2235 default: 2236 ret = -EBADFD; 2237 goto __end; 2238 } 2239 2240 hw_avail = snd_pcm_capture_hw_avail(runtime); 2241 if (hw_avail <= 0) { 2242 ret = 0; 2243 goto __end; 2244 } 2245 if (frames > (snd_pcm_uframes_t)hw_avail) 2246 frames = hw_avail; 2247 appl_ptr = runtime->control->appl_ptr - frames; 2248 if (appl_ptr < 0) 2249 appl_ptr += runtime->boundary; 2250 runtime->control->appl_ptr = appl_ptr; 2251 ret = frames; 2252 __end: 2253 snd_pcm_stream_unlock_irq(substream); 2254 return ret; 2255 } 2256 2257 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream, 2258 snd_pcm_uframes_t frames) 2259 { 2260 struct snd_pcm_runtime *runtime = substream->runtime; 2261 snd_pcm_sframes_t appl_ptr; 2262 snd_pcm_sframes_t ret; 2263 snd_pcm_sframes_t avail; 2264 2265 if (frames == 0) 2266 return 0; 2267 2268 snd_pcm_stream_lock_irq(substream); 2269 switch (runtime->status->state) { 2270 case SNDRV_PCM_STATE_PREPARED: 2271 case SNDRV_PCM_STATE_PAUSED: 2272 break; 2273 case SNDRV_PCM_STATE_DRAINING: 2274 case SNDRV_PCM_STATE_RUNNING: 2275 if (snd_pcm_update_hw_ptr(substream) >= 0) 2276 break; 2277 /* Fall through */ 2278 case SNDRV_PCM_STATE_XRUN: 2279 ret = -EPIPE; 2280 goto __end; 2281 case SNDRV_PCM_STATE_SUSPENDED: 2282 ret = -ESTRPIPE; 2283 goto __end; 2284 default: 2285 ret = -EBADFD; 2286 goto __end; 2287 } 2288 2289 avail = snd_pcm_playback_avail(runtime); 2290 if (avail <= 0) { 2291 ret = 0; 2292 goto __end; 2293 } 2294 if (frames > (snd_pcm_uframes_t)avail) 2295 frames = avail; 2296 appl_ptr = runtime->control->appl_ptr + frames; 2297 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) 2298 appl_ptr -= runtime->boundary; 2299 runtime->control->appl_ptr = appl_ptr; 2300 ret = frames; 2301 __end: 2302 snd_pcm_stream_unlock_irq(substream); 2303 return ret; 2304 } 2305 2306 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream, 2307 snd_pcm_uframes_t frames) 2308 { 2309 struct snd_pcm_runtime *runtime = substream->runtime; 2310 snd_pcm_sframes_t appl_ptr; 2311 snd_pcm_sframes_t ret; 2312 snd_pcm_sframes_t avail; 2313 2314 if (frames == 0) 2315 return 0; 2316 2317 snd_pcm_stream_lock_irq(substream); 2318 switch (runtime->status->state) { 2319 case SNDRV_PCM_STATE_PREPARED: 2320 case SNDRV_PCM_STATE_DRAINING: 2321 case SNDRV_PCM_STATE_PAUSED: 2322 break; 2323 case SNDRV_PCM_STATE_RUNNING: 2324 if (snd_pcm_update_hw_ptr(substream) >= 0) 2325 break; 2326 /* Fall through */ 2327 case SNDRV_PCM_STATE_XRUN: 2328 ret = -EPIPE; 2329 goto __end; 2330 case SNDRV_PCM_STATE_SUSPENDED: 2331 ret = -ESTRPIPE; 2332 goto __end; 2333 default: 2334 ret = -EBADFD; 2335 goto __end; 2336 } 2337 2338 avail = snd_pcm_capture_avail(runtime); 2339 if (avail <= 0) { 2340 ret = 0; 2341 goto __end; 2342 } 2343 if (frames > (snd_pcm_uframes_t)avail) 2344 frames = avail; 2345 appl_ptr = runtime->control->appl_ptr + frames; 2346 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) 2347 appl_ptr -= runtime->boundary; 2348 runtime->control->appl_ptr = appl_ptr; 2349 ret = frames; 2350 __end: 2351 snd_pcm_stream_unlock_irq(substream); 2352 return ret; 2353 } 2354 2355 static int snd_pcm_hwsync(struct snd_pcm_substream *substream) 2356 { 2357 struct snd_pcm_runtime *runtime = substream->runtime; 2358 int err; 2359 2360 snd_pcm_stream_lock_irq(substream); 2361 switch (runtime->status->state) { 2362 case SNDRV_PCM_STATE_DRAINING: 2363 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 2364 goto __badfd; 2365 case SNDRV_PCM_STATE_RUNNING: 2366 if ((err = snd_pcm_update_hw_ptr(substream)) < 0) 2367 break; 2368 /* Fall through */ 2369 case SNDRV_PCM_STATE_PREPARED: 2370 case SNDRV_PCM_STATE_SUSPENDED: 2371 err = 0; 2372 break; 2373 case SNDRV_PCM_STATE_XRUN: 2374 err = -EPIPE; 2375 break; 2376 default: 2377 __badfd: 2378 err = -EBADFD; 2379 break; 2380 } 2381 snd_pcm_stream_unlock_irq(substream); 2382 return err; 2383 } 2384 2385 static int snd_pcm_delay(struct snd_pcm_substream *substream, 2386 snd_pcm_sframes_t __user *res) 2387 { 2388 struct snd_pcm_runtime *runtime = substream->runtime; 2389 int err; 2390 snd_pcm_sframes_t n = 0; 2391 2392 snd_pcm_stream_lock_irq(substream); 2393 switch (runtime->status->state) { 2394 case SNDRV_PCM_STATE_DRAINING: 2395 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 2396 goto __badfd; 2397 case SNDRV_PCM_STATE_RUNNING: 2398 if ((err = snd_pcm_update_hw_ptr(substream)) < 0) 2399 break; 2400 /* Fall through */ 2401 case SNDRV_PCM_STATE_PREPARED: 2402 case SNDRV_PCM_STATE_SUSPENDED: 2403 err = 0; 2404 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2405 n = snd_pcm_playback_hw_avail(runtime); 2406 else 2407 n = snd_pcm_capture_avail(runtime); 2408 n += runtime->delay; 2409 break; 2410 case SNDRV_PCM_STATE_XRUN: 2411 err = -EPIPE; 2412 break; 2413 default: 2414 __badfd: 2415 err = -EBADFD; 2416 break; 2417 } 2418 snd_pcm_stream_unlock_irq(substream); 2419 if (!err) 2420 if (put_user(n, res)) 2421 err = -EFAULT; 2422 return err; 2423 } 2424 2425 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream, 2426 struct snd_pcm_sync_ptr __user *_sync_ptr) 2427 { 2428 struct snd_pcm_runtime *runtime = substream->runtime; 2429 struct snd_pcm_sync_ptr sync_ptr; 2430 volatile struct snd_pcm_mmap_status *status; 2431 volatile struct snd_pcm_mmap_control *control; 2432 int err; 2433 2434 memset(&sync_ptr, 0, sizeof(sync_ptr)); 2435 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags))) 2436 return -EFAULT; 2437 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control))) 2438 return -EFAULT; 2439 status = runtime->status; 2440 control = runtime->control; 2441 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) { 2442 err = snd_pcm_hwsync(substream); 2443 if (err < 0) 2444 return err; 2445 } 2446 snd_pcm_stream_lock_irq(substream); 2447 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) 2448 control->appl_ptr = sync_ptr.c.control.appl_ptr; 2449 else 2450 sync_ptr.c.control.appl_ptr = control->appl_ptr; 2451 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) 2452 control->avail_min = sync_ptr.c.control.avail_min; 2453 else 2454 sync_ptr.c.control.avail_min = control->avail_min; 2455 sync_ptr.s.status.state = status->state; 2456 sync_ptr.s.status.hw_ptr = status->hw_ptr; 2457 sync_ptr.s.status.tstamp = status->tstamp; 2458 sync_ptr.s.status.suspended_state = status->suspended_state; 2459 snd_pcm_stream_unlock_irq(substream); 2460 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr))) 2461 return -EFAULT; 2462 return 0; 2463 } 2464 2465 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg) 2466 { 2467 struct snd_pcm_runtime *runtime = substream->runtime; 2468 int arg; 2469 2470 if (get_user(arg, _arg)) 2471 return -EFAULT; 2472 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST) 2473 return -EINVAL; 2474 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY; 2475 if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC) 2476 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC; 2477 return 0; 2478 } 2479 2480 static int snd_pcm_common_ioctl1(struct file *file, 2481 struct snd_pcm_substream *substream, 2482 unsigned int cmd, void __user *arg) 2483 { 2484 switch (cmd) { 2485 case SNDRV_PCM_IOCTL_PVERSION: 2486 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0; 2487 case SNDRV_PCM_IOCTL_INFO: 2488 return snd_pcm_info_user(substream, arg); 2489 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */ 2490 return 0; 2491 case SNDRV_PCM_IOCTL_TTSTAMP: 2492 return snd_pcm_tstamp(substream, arg); 2493 case SNDRV_PCM_IOCTL_HW_REFINE: 2494 return snd_pcm_hw_refine_user(substream, arg); 2495 case SNDRV_PCM_IOCTL_HW_PARAMS: 2496 return snd_pcm_hw_params_user(substream, arg); 2497 case SNDRV_PCM_IOCTL_HW_FREE: 2498 return snd_pcm_hw_free(substream); 2499 case SNDRV_PCM_IOCTL_SW_PARAMS: 2500 return snd_pcm_sw_params_user(substream, arg); 2501 case SNDRV_PCM_IOCTL_STATUS: 2502 return snd_pcm_status_user(substream, arg); 2503 case SNDRV_PCM_IOCTL_CHANNEL_INFO: 2504 return snd_pcm_channel_info_user(substream, arg); 2505 case SNDRV_PCM_IOCTL_PREPARE: 2506 return snd_pcm_prepare(substream, file); 2507 case SNDRV_PCM_IOCTL_RESET: 2508 return snd_pcm_reset(substream); 2509 case SNDRV_PCM_IOCTL_START: 2510 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING); 2511 case SNDRV_PCM_IOCTL_LINK: 2512 return snd_pcm_link(substream, (int)(unsigned long) arg); 2513 case SNDRV_PCM_IOCTL_UNLINK: 2514 return snd_pcm_unlink(substream); 2515 case SNDRV_PCM_IOCTL_RESUME: 2516 return snd_pcm_resume(substream); 2517 case SNDRV_PCM_IOCTL_XRUN: 2518 return snd_pcm_xrun(substream); 2519 case SNDRV_PCM_IOCTL_HWSYNC: 2520 return snd_pcm_hwsync(substream); 2521 case SNDRV_PCM_IOCTL_DELAY: 2522 return snd_pcm_delay(substream, arg); 2523 case SNDRV_PCM_IOCTL_SYNC_PTR: 2524 return snd_pcm_sync_ptr(substream, arg); 2525 #ifdef CONFIG_SND_SUPPORT_OLD_API 2526 case SNDRV_PCM_IOCTL_HW_REFINE_OLD: 2527 return snd_pcm_hw_refine_old_user(substream, arg); 2528 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD: 2529 return snd_pcm_hw_params_old_user(substream, arg); 2530 #endif 2531 case SNDRV_PCM_IOCTL_DRAIN: 2532 return snd_pcm_drain(substream, file); 2533 case SNDRV_PCM_IOCTL_DROP: 2534 return snd_pcm_drop(substream); 2535 case SNDRV_PCM_IOCTL_PAUSE: 2536 { 2537 int res; 2538 snd_pcm_stream_lock_irq(substream); 2539 res = snd_pcm_pause(substream, (int)(unsigned long)arg); 2540 snd_pcm_stream_unlock_irq(substream); 2541 return res; 2542 } 2543 } 2544 snd_printd("unknown ioctl = 0x%x\n", cmd); 2545 return -ENOTTY; 2546 } 2547 2548 static int snd_pcm_playback_ioctl1(struct file *file, 2549 struct snd_pcm_substream *substream, 2550 unsigned int cmd, void __user *arg) 2551 { 2552 if (snd_BUG_ON(!substream)) 2553 return -ENXIO; 2554 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) 2555 return -EINVAL; 2556 switch (cmd) { 2557 case SNDRV_PCM_IOCTL_WRITEI_FRAMES: 2558 { 2559 struct snd_xferi xferi; 2560 struct snd_xferi __user *_xferi = arg; 2561 struct snd_pcm_runtime *runtime = substream->runtime; 2562 snd_pcm_sframes_t result; 2563 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2564 return -EBADFD; 2565 if (put_user(0, &_xferi->result)) 2566 return -EFAULT; 2567 if (copy_from_user(&xferi, _xferi, sizeof(xferi))) 2568 return -EFAULT; 2569 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames); 2570 __put_user(result, &_xferi->result); 2571 return result < 0 ? result : 0; 2572 } 2573 case SNDRV_PCM_IOCTL_WRITEN_FRAMES: 2574 { 2575 struct snd_xfern xfern; 2576 struct snd_xfern __user *_xfern = arg; 2577 struct snd_pcm_runtime *runtime = substream->runtime; 2578 void __user **bufs; 2579 snd_pcm_sframes_t result; 2580 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2581 return -EBADFD; 2582 if (runtime->channels > 128) 2583 return -EINVAL; 2584 if (put_user(0, &_xfern->result)) 2585 return -EFAULT; 2586 if (copy_from_user(&xfern, _xfern, sizeof(xfern))) 2587 return -EFAULT; 2588 2589 bufs = memdup_user(xfern.bufs, 2590 sizeof(void *) * runtime->channels); 2591 if (IS_ERR(bufs)) 2592 return PTR_ERR(bufs); 2593 result = snd_pcm_lib_writev(substream, bufs, xfern.frames); 2594 kfree(bufs); 2595 __put_user(result, &_xfern->result); 2596 return result < 0 ? result : 0; 2597 } 2598 case SNDRV_PCM_IOCTL_REWIND: 2599 { 2600 snd_pcm_uframes_t frames; 2601 snd_pcm_uframes_t __user *_frames = arg; 2602 snd_pcm_sframes_t result; 2603 if (get_user(frames, _frames)) 2604 return -EFAULT; 2605 if (put_user(0, _frames)) 2606 return -EFAULT; 2607 result = snd_pcm_playback_rewind(substream, frames); 2608 __put_user(result, _frames); 2609 return result < 0 ? result : 0; 2610 } 2611 case SNDRV_PCM_IOCTL_FORWARD: 2612 { 2613 snd_pcm_uframes_t frames; 2614 snd_pcm_uframes_t __user *_frames = arg; 2615 snd_pcm_sframes_t result; 2616 if (get_user(frames, _frames)) 2617 return -EFAULT; 2618 if (put_user(0, _frames)) 2619 return -EFAULT; 2620 result = snd_pcm_playback_forward(substream, frames); 2621 __put_user(result, _frames); 2622 return result < 0 ? result : 0; 2623 } 2624 } 2625 return snd_pcm_common_ioctl1(file, substream, cmd, arg); 2626 } 2627 2628 static int snd_pcm_capture_ioctl1(struct file *file, 2629 struct snd_pcm_substream *substream, 2630 unsigned int cmd, void __user *arg) 2631 { 2632 if (snd_BUG_ON(!substream)) 2633 return -ENXIO; 2634 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE)) 2635 return -EINVAL; 2636 switch (cmd) { 2637 case SNDRV_PCM_IOCTL_READI_FRAMES: 2638 { 2639 struct snd_xferi xferi; 2640 struct snd_xferi __user *_xferi = arg; 2641 struct snd_pcm_runtime *runtime = substream->runtime; 2642 snd_pcm_sframes_t result; 2643 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2644 return -EBADFD; 2645 if (put_user(0, &_xferi->result)) 2646 return -EFAULT; 2647 if (copy_from_user(&xferi, _xferi, sizeof(xferi))) 2648 return -EFAULT; 2649 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames); 2650 __put_user(result, &_xferi->result); 2651 return result < 0 ? result : 0; 2652 } 2653 case SNDRV_PCM_IOCTL_READN_FRAMES: 2654 { 2655 struct snd_xfern xfern; 2656 struct snd_xfern __user *_xfern = arg; 2657 struct snd_pcm_runtime *runtime = substream->runtime; 2658 void *bufs; 2659 snd_pcm_sframes_t result; 2660 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2661 return -EBADFD; 2662 if (runtime->channels > 128) 2663 return -EINVAL; 2664 if (put_user(0, &_xfern->result)) 2665 return -EFAULT; 2666 if (copy_from_user(&xfern, _xfern, sizeof(xfern))) 2667 return -EFAULT; 2668 2669 bufs = memdup_user(xfern.bufs, 2670 sizeof(void *) * runtime->channels); 2671 if (IS_ERR(bufs)) 2672 return PTR_ERR(bufs); 2673 result = snd_pcm_lib_readv(substream, bufs, xfern.frames); 2674 kfree(bufs); 2675 __put_user(result, &_xfern->result); 2676 return result < 0 ? result : 0; 2677 } 2678 case SNDRV_PCM_IOCTL_REWIND: 2679 { 2680 snd_pcm_uframes_t frames; 2681 snd_pcm_uframes_t __user *_frames = arg; 2682 snd_pcm_sframes_t result; 2683 if (get_user(frames, _frames)) 2684 return -EFAULT; 2685 if (put_user(0, _frames)) 2686 return -EFAULT; 2687 result = snd_pcm_capture_rewind(substream, frames); 2688 __put_user(result, _frames); 2689 return result < 0 ? result : 0; 2690 } 2691 case SNDRV_PCM_IOCTL_FORWARD: 2692 { 2693 snd_pcm_uframes_t frames; 2694 snd_pcm_uframes_t __user *_frames = arg; 2695 snd_pcm_sframes_t result; 2696 if (get_user(frames, _frames)) 2697 return -EFAULT; 2698 if (put_user(0, _frames)) 2699 return -EFAULT; 2700 result = snd_pcm_capture_forward(substream, frames); 2701 __put_user(result, _frames); 2702 return result < 0 ? result : 0; 2703 } 2704 } 2705 return snd_pcm_common_ioctl1(file, substream, cmd, arg); 2706 } 2707 2708 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd, 2709 unsigned long arg) 2710 { 2711 struct snd_pcm_file *pcm_file; 2712 2713 pcm_file = file->private_data; 2714 2715 if (((cmd >> 8) & 0xff) != 'A') 2716 return -ENOTTY; 2717 2718 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd, 2719 (void __user *)arg); 2720 } 2721 2722 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd, 2723 unsigned long arg) 2724 { 2725 struct snd_pcm_file *pcm_file; 2726 2727 pcm_file = file->private_data; 2728 2729 if (((cmd >> 8) & 0xff) != 'A') 2730 return -ENOTTY; 2731 2732 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd, 2733 (void __user *)arg); 2734 } 2735 2736 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, 2737 unsigned int cmd, void *arg) 2738 { 2739 mm_segment_t fs; 2740 int result; 2741 2742 fs = snd_enter_user(); 2743 switch (substream->stream) { 2744 case SNDRV_PCM_STREAM_PLAYBACK: 2745 result = snd_pcm_playback_ioctl1(NULL, substream, cmd, 2746 (void __user *)arg); 2747 break; 2748 case SNDRV_PCM_STREAM_CAPTURE: 2749 result = snd_pcm_capture_ioctl1(NULL, substream, cmd, 2750 (void __user *)arg); 2751 break; 2752 default: 2753 result = -EINVAL; 2754 break; 2755 } 2756 snd_leave_user(fs); 2757 return result; 2758 } 2759 2760 EXPORT_SYMBOL(snd_pcm_kernel_ioctl); 2761 2762 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count, 2763 loff_t * offset) 2764 { 2765 struct snd_pcm_file *pcm_file; 2766 struct snd_pcm_substream *substream; 2767 struct snd_pcm_runtime *runtime; 2768 snd_pcm_sframes_t result; 2769 2770 pcm_file = file->private_data; 2771 substream = pcm_file->substream; 2772 if (PCM_RUNTIME_CHECK(substream)) 2773 return -ENXIO; 2774 runtime = substream->runtime; 2775 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2776 return -EBADFD; 2777 if (!frame_aligned(runtime, count)) 2778 return -EINVAL; 2779 count = bytes_to_frames(runtime, count); 2780 result = snd_pcm_lib_read(substream, buf, count); 2781 if (result > 0) 2782 result = frames_to_bytes(runtime, result); 2783 return result; 2784 } 2785 2786 static ssize_t snd_pcm_write(struct file *file, const char __user *buf, 2787 size_t count, loff_t * offset) 2788 { 2789 struct snd_pcm_file *pcm_file; 2790 struct snd_pcm_substream *substream; 2791 struct snd_pcm_runtime *runtime; 2792 snd_pcm_sframes_t result; 2793 2794 pcm_file = file->private_data; 2795 substream = pcm_file->substream; 2796 if (PCM_RUNTIME_CHECK(substream)) 2797 return -ENXIO; 2798 runtime = substream->runtime; 2799 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2800 return -EBADFD; 2801 if (!frame_aligned(runtime, count)) 2802 return -EINVAL; 2803 count = bytes_to_frames(runtime, count); 2804 result = snd_pcm_lib_write(substream, buf, count); 2805 if (result > 0) 2806 result = frames_to_bytes(runtime, result); 2807 return result; 2808 } 2809 2810 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov, 2811 unsigned long nr_segs, loff_t pos) 2812 2813 { 2814 struct snd_pcm_file *pcm_file; 2815 struct snd_pcm_substream *substream; 2816 struct snd_pcm_runtime *runtime; 2817 snd_pcm_sframes_t result; 2818 unsigned long i; 2819 void __user **bufs; 2820 snd_pcm_uframes_t frames; 2821 2822 pcm_file = iocb->ki_filp->private_data; 2823 substream = pcm_file->substream; 2824 if (PCM_RUNTIME_CHECK(substream)) 2825 return -ENXIO; 2826 runtime = substream->runtime; 2827 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2828 return -EBADFD; 2829 if (nr_segs > 1024 || nr_segs != runtime->channels) 2830 return -EINVAL; 2831 if (!frame_aligned(runtime, iov->iov_len)) 2832 return -EINVAL; 2833 frames = bytes_to_samples(runtime, iov->iov_len); 2834 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL); 2835 if (bufs == NULL) 2836 return -ENOMEM; 2837 for (i = 0; i < nr_segs; ++i) 2838 bufs[i] = iov[i].iov_base; 2839 result = snd_pcm_lib_readv(substream, bufs, frames); 2840 if (result > 0) 2841 result = frames_to_bytes(runtime, result); 2842 kfree(bufs); 2843 return result; 2844 } 2845 2846 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov, 2847 unsigned long nr_segs, loff_t pos) 2848 { 2849 struct snd_pcm_file *pcm_file; 2850 struct snd_pcm_substream *substream; 2851 struct snd_pcm_runtime *runtime; 2852 snd_pcm_sframes_t result; 2853 unsigned long i; 2854 void __user **bufs; 2855 snd_pcm_uframes_t frames; 2856 2857 pcm_file = iocb->ki_filp->private_data; 2858 substream = pcm_file->substream; 2859 if (PCM_RUNTIME_CHECK(substream)) 2860 return -ENXIO; 2861 runtime = substream->runtime; 2862 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2863 return -EBADFD; 2864 if (nr_segs > 128 || nr_segs != runtime->channels || 2865 !frame_aligned(runtime, iov->iov_len)) 2866 return -EINVAL; 2867 frames = bytes_to_samples(runtime, iov->iov_len); 2868 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL); 2869 if (bufs == NULL) 2870 return -ENOMEM; 2871 for (i = 0; i < nr_segs; ++i) 2872 bufs[i] = iov[i].iov_base; 2873 result = snd_pcm_lib_writev(substream, bufs, frames); 2874 if (result > 0) 2875 result = frames_to_bytes(runtime, result); 2876 kfree(bufs); 2877 return result; 2878 } 2879 2880 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait) 2881 { 2882 struct snd_pcm_file *pcm_file; 2883 struct snd_pcm_substream *substream; 2884 struct snd_pcm_runtime *runtime; 2885 unsigned int mask; 2886 snd_pcm_uframes_t avail; 2887 2888 pcm_file = file->private_data; 2889 2890 substream = pcm_file->substream; 2891 if (PCM_RUNTIME_CHECK(substream)) 2892 return -ENXIO; 2893 runtime = substream->runtime; 2894 2895 poll_wait(file, &runtime->sleep, wait); 2896 2897 snd_pcm_stream_lock_irq(substream); 2898 avail = snd_pcm_playback_avail(runtime); 2899 switch (runtime->status->state) { 2900 case SNDRV_PCM_STATE_RUNNING: 2901 case SNDRV_PCM_STATE_PREPARED: 2902 case SNDRV_PCM_STATE_PAUSED: 2903 if (avail >= runtime->control->avail_min) { 2904 mask = POLLOUT | POLLWRNORM; 2905 break; 2906 } 2907 /* Fall through */ 2908 case SNDRV_PCM_STATE_DRAINING: 2909 mask = 0; 2910 break; 2911 default: 2912 mask = POLLOUT | POLLWRNORM | POLLERR; 2913 break; 2914 } 2915 snd_pcm_stream_unlock_irq(substream); 2916 return mask; 2917 } 2918 2919 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait) 2920 { 2921 struct snd_pcm_file *pcm_file; 2922 struct snd_pcm_substream *substream; 2923 struct snd_pcm_runtime *runtime; 2924 unsigned int mask; 2925 snd_pcm_uframes_t avail; 2926 2927 pcm_file = file->private_data; 2928 2929 substream = pcm_file->substream; 2930 if (PCM_RUNTIME_CHECK(substream)) 2931 return -ENXIO; 2932 runtime = substream->runtime; 2933 2934 poll_wait(file, &runtime->sleep, wait); 2935 2936 snd_pcm_stream_lock_irq(substream); 2937 avail = snd_pcm_capture_avail(runtime); 2938 switch (runtime->status->state) { 2939 case SNDRV_PCM_STATE_RUNNING: 2940 case SNDRV_PCM_STATE_PREPARED: 2941 case SNDRV_PCM_STATE_PAUSED: 2942 if (avail >= runtime->control->avail_min) { 2943 mask = POLLIN | POLLRDNORM; 2944 break; 2945 } 2946 mask = 0; 2947 break; 2948 case SNDRV_PCM_STATE_DRAINING: 2949 if (avail > 0) { 2950 mask = POLLIN | POLLRDNORM; 2951 break; 2952 } 2953 /* Fall through */ 2954 default: 2955 mask = POLLIN | POLLRDNORM | POLLERR; 2956 break; 2957 } 2958 snd_pcm_stream_unlock_irq(substream); 2959 return mask; 2960 } 2961 2962 /* 2963 * mmap support 2964 */ 2965 2966 /* 2967 * Only on coherent architectures, we can mmap the status and the control records 2968 * for effcient data transfer. On others, we have to use HWSYNC ioctl... 2969 */ 2970 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) 2971 /* 2972 * mmap status record 2973 */ 2974 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area, 2975 struct vm_fault *vmf) 2976 { 2977 struct snd_pcm_substream *substream = area->vm_private_data; 2978 struct snd_pcm_runtime *runtime; 2979 2980 if (substream == NULL) 2981 return VM_FAULT_SIGBUS; 2982 runtime = substream->runtime; 2983 vmf->page = virt_to_page(runtime->status); 2984 get_page(vmf->page); 2985 return 0; 2986 } 2987 2988 static const struct vm_operations_struct snd_pcm_vm_ops_status = 2989 { 2990 .fault = snd_pcm_mmap_status_fault, 2991 }; 2992 2993 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, 2994 struct vm_area_struct *area) 2995 { 2996 struct snd_pcm_runtime *runtime; 2997 long size; 2998 if (!(area->vm_flags & VM_READ)) 2999 return -EINVAL; 3000 runtime = substream->runtime; 3001 size = area->vm_end - area->vm_start; 3002 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))) 3003 return -EINVAL; 3004 area->vm_ops = &snd_pcm_vm_ops_status; 3005 area->vm_private_data = substream; 3006 area->vm_flags |= VM_RESERVED; 3007 return 0; 3008 } 3009 3010 /* 3011 * mmap control record 3012 */ 3013 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area, 3014 struct vm_fault *vmf) 3015 { 3016 struct snd_pcm_substream *substream = area->vm_private_data; 3017 struct snd_pcm_runtime *runtime; 3018 3019 if (substream == NULL) 3020 return VM_FAULT_SIGBUS; 3021 runtime = substream->runtime; 3022 vmf->page = virt_to_page(runtime->control); 3023 get_page(vmf->page); 3024 return 0; 3025 } 3026 3027 static const struct vm_operations_struct snd_pcm_vm_ops_control = 3028 { 3029 .fault = snd_pcm_mmap_control_fault, 3030 }; 3031 3032 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, 3033 struct vm_area_struct *area) 3034 { 3035 struct snd_pcm_runtime *runtime; 3036 long size; 3037 if (!(area->vm_flags & VM_READ)) 3038 return -EINVAL; 3039 runtime = substream->runtime; 3040 size = area->vm_end - area->vm_start; 3041 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))) 3042 return -EINVAL; 3043 area->vm_ops = &snd_pcm_vm_ops_control; 3044 area->vm_private_data = substream; 3045 area->vm_flags |= VM_RESERVED; 3046 return 0; 3047 } 3048 #else /* ! coherent mmap */ 3049 /* 3050 * don't support mmap for status and control records. 3051 */ 3052 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, 3053 struct vm_area_struct *area) 3054 { 3055 return -ENXIO; 3056 } 3057 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, 3058 struct vm_area_struct *area) 3059 { 3060 return -ENXIO; 3061 } 3062 #endif /* coherent mmap */ 3063 3064 /* 3065 * fault callback for mmapping a RAM page 3066 */ 3067 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area, 3068 struct vm_fault *vmf) 3069 { 3070 struct snd_pcm_substream *substream = area->vm_private_data; 3071 struct snd_pcm_runtime *runtime; 3072 unsigned long offset; 3073 struct page * page; 3074 void *vaddr; 3075 size_t dma_bytes; 3076 3077 if (substream == NULL) 3078 return VM_FAULT_SIGBUS; 3079 runtime = substream->runtime; 3080 offset = vmf->pgoff << PAGE_SHIFT; 3081 dma_bytes = PAGE_ALIGN(runtime->dma_bytes); 3082 if (offset > dma_bytes - PAGE_SIZE) 3083 return VM_FAULT_SIGBUS; 3084 if (substream->ops->page) { 3085 page = substream->ops->page(substream, offset); 3086 if (!page) 3087 return VM_FAULT_SIGBUS; 3088 } else { 3089 vaddr = runtime->dma_area + offset; 3090 page = virt_to_page(vaddr); 3091 } 3092 get_page(page); 3093 vmf->page = page; 3094 return 0; 3095 } 3096 3097 static const struct vm_operations_struct snd_pcm_vm_ops_data = 3098 { 3099 .open = snd_pcm_mmap_data_open, 3100 .close = snd_pcm_mmap_data_close, 3101 .fault = snd_pcm_mmap_data_fault, 3102 }; 3103 3104 /* 3105 * mmap the DMA buffer on RAM 3106 */ 3107 static int snd_pcm_default_mmap(struct snd_pcm_substream *substream, 3108 struct vm_area_struct *area) 3109 { 3110 area->vm_ops = &snd_pcm_vm_ops_data; 3111 area->vm_private_data = substream; 3112 area->vm_flags |= VM_RESERVED; 3113 atomic_inc(&substream->mmap_count); 3114 return 0; 3115 } 3116 3117 /* 3118 * mmap the DMA buffer on I/O memory area 3119 */ 3120 #if SNDRV_PCM_INFO_MMAP_IOMEM 3121 static const struct vm_operations_struct snd_pcm_vm_ops_data_mmio = 3122 { 3123 .open = snd_pcm_mmap_data_open, 3124 .close = snd_pcm_mmap_data_close, 3125 }; 3126 3127 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, 3128 struct vm_area_struct *area) 3129 { 3130 long size; 3131 unsigned long offset; 3132 3133 #ifdef pgprot_noncached 3134 area->vm_page_prot = pgprot_noncached(area->vm_page_prot); 3135 #endif 3136 area->vm_ops = &snd_pcm_vm_ops_data_mmio; 3137 area->vm_private_data = substream; 3138 area->vm_flags |= VM_IO; 3139 size = area->vm_end - area->vm_start; 3140 offset = area->vm_pgoff << PAGE_SHIFT; 3141 if (io_remap_pfn_range(area, area->vm_start, 3142 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT, 3143 size, area->vm_page_prot)) 3144 return -EAGAIN; 3145 atomic_inc(&substream->mmap_count); 3146 return 0; 3147 } 3148 3149 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem); 3150 #endif /* SNDRV_PCM_INFO_MMAP */ 3151 3152 /* 3153 * mmap DMA buffer 3154 */ 3155 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, 3156 struct vm_area_struct *area) 3157 { 3158 struct snd_pcm_runtime *runtime; 3159 long size; 3160 unsigned long offset; 3161 size_t dma_bytes; 3162 3163 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 3164 if (!(area->vm_flags & (VM_WRITE|VM_READ))) 3165 return -EINVAL; 3166 } else { 3167 if (!(area->vm_flags & VM_READ)) 3168 return -EINVAL; 3169 } 3170 runtime = substream->runtime; 3171 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 3172 return -EBADFD; 3173 if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) 3174 return -ENXIO; 3175 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || 3176 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) 3177 return -EINVAL; 3178 size = area->vm_end - area->vm_start; 3179 offset = area->vm_pgoff << PAGE_SHIFT; 3180 dma_bytes = PAGE_ALIGN(runtime->dma_bytes); 3181 if ((size_t)size > dma_bytes) 3182 return -EINVAL; 3183 if (offset > dma_bytes - size) 3184 return -EINVAL; 3185 3186 if (substream->ops->mmap) 3187 return substream->ops->mmap(substream, area); 3188 else 3189 return snd_pcm_default_mmap(substream, area); 3190 } 3191 3192 EXPORT_SYMBOL(snd_pcm_mmap_data); 3193 3194 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area) 3195 { 3196 struct snd_pcm_file * pcm_file; 3197 struct snd_pcm_substream *substream; 3198 unsigned long offset; 3199 3200 pcm_file = file->private_data; 3201 substream = pcm_file->substream; 3202 if (PCM_RUNTIME_CHECK(substream)) 3203 return -ENXIO; 3204 3205 offset = area->vm_pgoff << PAGE_SHIFT; 3206 switch (offset) { 3207 case SNDRV_PCM_MMAP_OFFSET_STATUS: 3208 if (pcm_file->no_compat_mmap) 3209 return -ENXIO; 3210 return snd_pcm_mmap_status(substream, file, area); 3211 case SNDRV_PCM_MMAP_OFFSET_CONTROL: 3212 if (pcm_file->no_compat_mmap) 3213 return -ENXIO; 3214 return snd_pcm_mmap_control(substream, file, area); 3215 default: 3216 return snd_pcm_mmap_data(substream, file, area); 3217 } 3218 return 0; 3219 } 3220 3221 static int snd_pcm_fasync(int fd, struct file * file, int on) 3222 { 3223 struct snd_pcm_file * pcm_file; 3224 struct snd_pcm_substream *substream; 3225 struct snd_pcm_runtime *runtime; 3226 int err = -ENXIO; 3227 3228 lock_kernel(); 3229 pcm_file = file->private_data; 3230 substream = pcm_file->substream; 3231 if (PCM_RUNTIME_CHECK(substream)) 3232 goto out; 3233 runtime = substream->runtime; 3234 err = fasync_helper(fd, file, on, &runtime->fasync); 3235 out: 3236 unlock_kernel(); 3237 return err; 3238 } 3239 3240 /* 3241 * ioctl32 compat 3242 */ 3243 #ifdef CONFIG_COMPAT 3244 #include "pcm_compat.c" 3245 #else 3246 #define snd_pcm_ioctl_compat NULL 3247 #endif 3248 3249 /* 3250 * To be removed helpers to keep binary compatibility 3251 */ 3252 3253 #ifdef CONFIG_SND_SUPPORT_OLD_API 3254 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5)) 3255 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5)) 3256 3257 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params, 3258 struct snd_pcm_hw_params_old *oparams) 3259 { 3260 unsigned int i; 3261 3262 memset(params, 0, sizeof(*params)); 3263 params->flags = oparams->flags; 3264 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) 3265 params->masks[i].bits[0] = oparams->masks[i]; 3266 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals)); 3267 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask); 3268 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask); 3269 params->info = oparams->info; 3270 params->msbits = oparams->msbits; 3271 params->rate_num = oparams->rate_num; 3272 params->rate_den = oparams->rate_den; 3273 params->fifo_size = oparams->fifo_size; 3274 } 3275 3276 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams, 3277 struct snd_pcm_hw_params *params) 3278 { 3279 unsigned int i; 3280 3281 memset(oparams, 0, sizeof(*oparams)); 3282 oparams->flags = params->flags; 3283 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) 3284 oparams->masks[i] = params->masks[i].bits[0]; 3285 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals)); 3286 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask); 3287 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask); 3288 oparams->info = params->info; 3289 oparams->msbits = params->msbits; 3290 oparams->rate_num = params->rate_num; 3291 oparams->rate_den = params->rate_den; 3292 oparams->fifo_size = params->fifo_size; 3293 } 3294 3295 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, 3296 struct snd_pcm_hw_params_old __user * _oparams) 3297 { 3298 struct snd_pcm_hw_params *params; 3299 struct snd_pcm_hw_params_old *oparams = NULL; 3300 int err; 3301 3302 params = kmalloc(sizeof(*params), GFP_KERNEL); 3303 if (!params) 3304 return -ENOMEM; 3305 3306 oparams = memdup_user(_oparams, sizeof(*oparams)); 3307 if (IS_ERR(oparams)) { 3308 err = PTR_ERR(oparams); 3309 goto out; 3310 } 3311 snd_pcm_hw_convert_from_old_params(params, oparams); 3312 err = snd_pcm_hw_refine(substream, params); 3313 snd_pcm_hw_convert_to_old_params(oparams, params); 3314 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { 3315 if (!err) 3316 err = -EFAULT; 3317 } 3318 3319 kfree(oparams); 3320 out: 3321 kfree(params); 3322 return err; 3323 } 3324 3325 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, 3326 struct snd_pcm_hw_params_old __user * _oparams) 3327 { 3328 struct snd_pcm_hw_params *params; 3329 struct snd_pcm_hw_params_old *oparams = NULL; 3330 int err; 3331 3332 params = kmalloc(sizeof(*params), GFP_KERNEL); 3333 if (!params) 3334 return -ENOMEM; 3335 3336 oparams = memdup_user(_oparams, sizeof(*oparams)); 3337 if (IS_ERR(oparams)) { 3338 err = PTR_ERR(oparams); 3339 goto out; 3340 } 3341 snd_pcm_hw_convert_from_old_params(params, oparams); 3342 err = snd_pcm_hw_params(substream, params); 3343 snd_pcm_hw_convert_to_old_params(oparams, params); 3344 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { 3345 if (!err) 3346 err = -EFAULT; 3347 } 3348 3349 kfree(oparams); 3350 out: 3351 kfree(params); 3352 return err; 3353 } 3354 #endif /* CONFIG_SND_SUPPORT_OLD_API */ 3355 3356 #ifndef CONFIG_MMU 3357 unsigned long dummy_get_unmapped_area(struct file *file, unsigned long addr, 3358 unsigned long len, unsigned long pgoff, 3359 unsigned long flags) 3360 { 3361 return 0; 3362 } 3363 #else 3364 # define dummy_get_unmapped_area NULL 3365 #endif 3366 3367 /* 3368 * Register section 3369 */ 3370 3371 const struct file_operations snd_pcm_f_ops[2] = { 3372 { 3373 .owner = THIS_MODULE, 3374 .write = snd_pcm_write, 3375 .aio_write = snd_pcm_aio_write, 3376 .open = snd_pcm_playback_open, 3377 .release = snd_pcm_release, 3378 .poll = snd_pcm_playback_poll, 3379 .unlocked_ioctl = snd_pcm_playback_ioctl, 3380 .compat_ioctl = snd_pcm_ioctl_compat, 3381 .mmap = snd_pcm_mmap, 3382 .fasync = snd_pcm_fasync, 3383 .get_unmapped_area = dummy_get_unmapped_area, 3384 }, 3385 { 3386 .owner = THIS_MODULE, 3387 .read = snd_pcm_read, 3388 .aio_read = snd_pcm_aio_read, 3389 .open = snd_pcm_capture_open, 3390 .release = snd_pcm_release, 3391 .poll = snd_pcm_capture_poll, 3392 .unlocked_ioctl = snd_pcm_capture_ioctl, 3393 .compat_ioctl = snd_pcm_ioctl_compat, 3394 .mmap = snd_pcm_mmap, 3395 .fasync = snd_pcm_fasync, 3396 .get_unmapped_area = dummy_get_unmapped_area, 3397 } 3398 }; 3399