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