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