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