1 /* 2 * Digital Audio (PCM) abstract layer 3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 4 * 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 * 20 */ 21 22 #include <linux/mm.h> 23 #include <linux/file.h> 24 #include <linux/slab.h> 25 #include <linux/time.h> 26 #include <linux/pm_qos_params.h> 27 #include <linux/uio.h> 28 #include <linux/dma-mapping.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 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT) 38 #include <dma-coherence.h> 39 #endif 40 41 /* 42 * Compatibility 43 */ 44 45 struct snd_pcm_hw_params_old { 46 unsigned int flags; 47 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT - 48 SNDRV_PCM_HW_PARAM_ACCESS + 1]; 49 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME - 50 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1]; 51 unsigned int rmask; 52 unsigned int cmask; 53 unsigned int info; 54 unsigned int msbits; 55 unsigned int rate_num; 56 unsigned int rate_den; 57 snd_pcm_uframes_t fifo_size; 58 unsigned char reserved[64]; 59 }; 60 61 #ifdef CONFIG_SND_SUPPORT_OLD_API 62 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old) 63 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old) 64 65 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, 66 struct snd_pcm_hw_params_old __user * _oparams); 67 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, 68 struct snd_pcm_hw_params_old __user * _oparams); 69 #endif 70 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream); 71 72 /* 73 * 74 */ 75 76 DEFINE_RWLOCK(snd_pcm_link_rwlock); 77 EXPORT_SYMBOL(snd_pcm_link_rwlock); 78 79 static DECLARE_RWSEM(snd_pcm_link_rwsem); 80 81 static inline mm_segment_t snd_enter_user(void) 82 { 83 mm_segment_t fs = get_fs(); 84 set_fs(get_ds()); 85 return fs; 86 } 87 88 static inline void snd_leave_user(mm_segment_t fs) 89 { 90 set_fs(fs); 91 } 92 93 94 95 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info) 96 { 97 struct snd_pcm_runtime *runtime; 98 struct snd_pcm *pcm = substream->pcm; 99 struct snd_pcm_str *pstr = substream->pstr; 100 101 memset(info, 0, sizeof(*info)); 102 info->card = pcm->card->number; 103 info->device = pcm->device; 104 info->stream = substream->stream; 105 info->subdevice = substream->number; 106 strlcpy(info->id, pcm->id, sizeof(info->id)); 107 strlcpy(info->name, pcm->name, sizeof(info->name)); 108 info->dev_class = pcm->dev_class; 109 info->dev_subclass = pcm->dev_subclass; 110 info->subdevices_count = pstr->substream_count; 111 info->subdevices_avail = pstr->substream_count - pstr->substream_opened; 112 strlcpy(info->subname, substream->name, sizeof(info->subname)); 113 runtime = substream->runtime; 114 /* AB: FIXME!!! This is definitely nonsense */ 115 if (runtime) { 116 info->sync = runtime->sync; 117 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info); 118 } 119 return 0; 120 } 121 122 int snd_pcm_info_user(struct snd_pcm_substream *substream, 123 struct snd_pcm_info __user * _info) 124 { 125 struct snd_pcm_info *info; 126 int err; 127 128 info = kmalloc(sizeof(*info), GFP_KERNEL); 129 if (! info) 130 return -ENOMEM; 131 err = snd_pcm_info(substream, info); 132 if (err >= 0) { 133 if (copy_to_user(_info, info, sizeof(*info))) 134 err = -EFAULT; 135 } 136 kfree(info); 137 return err; 138 } 139 140 #undef RULES_DEBUG 141 142 #ifdef RULES_DEBUG 143 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v 144 static const char * const snd_pcm_hw_param_names[] = { 145 HW_PARAM(ACCESS), 146 HW_PARAM(FORMAT), 147 HW_PARAM(SUBFORMAT), 148 HW_PARAM(SAMPLE_BITS), 149 HW_PARAM(FRAME_BITS), 150 HW_PARAM(CHANNELS), 151 HW_PARAM(RATE), 152 HW_PARAM(PERIOD_TIME), 153 HW_PARAM(PERIOD_SIZE), 154 HW_PARAM(PERIOD_BYTES), 155 HW_PARAM(PERIODS), 156 HW_PARAM(BUFFER_TIME), 157 HW_PARAM(BUFFER_SIZE), 158 HW_PARAM(BUFFER_BYTES), 159 HW_PARAM(TICK_TIME), 160 }; 161 #endif 162 163 int snd_pcm_hw_refine(struct snd_pcm_substream *substream, 164 struct snd_pcm_hw_params *params) 165 { 166 unsigned int k; 167 struct snd_pcm_hardware *hw; 168 struct snd_interval *i = NULL; 169 struct snd_mask *m = NULL; 170 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints; 171 unsigned int rstamps[constrs->rules_num]; 172 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1]; 173 unsigned int stamp = 2; 174 int changed, again; 175 176 params->info = 0; 177 params->fifo_size = 0; 178 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS)) 179 params->msbits = 0; 180 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) { 181 params->rate_num = 0; 182 params->rate_den = 0; 183 } 184 185 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { 186 m = hw_param_mask(params, k); 187 if (snd_mask_empty(m)) 188 return -EINVAL; 189 if (!(params->rmask & (1 << k))) 190 continue; 191 #ifdef RULES_DEBUG 192 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]); 193 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); 194 #endif 195 changed = snd_mask_refine(m, constrs_mask(constrs, k)); 196 #ifdef RULES_DEBUG 197 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); 198 #endif 199 if (changed) 200 params->cmask |= 1 << k; 201 if (changed < 0) 202 return changed; 203 } 204 205 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { 206 i = hw_param_interval(params, k); 207 if (snd_interval_empty(i)) 208 return -EINVAL; 209 if (!(params->rmask & (1 << k))) 210 continue; 211 #ifdef RULES_DEBUG 212 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]); 213 if (i->empty) 214 printk("empty"); 215 else 216 printk("%c%u %u%c", 217 i->openmin ? '(' : '[', i->min, 218 i->max, i->openmax ? ')' : ']'); 219 printk(" -> "); 220 #endif 221 changed = snd_interval_refine(i, constrs_interval(constrs, k)); 222 #ifdef RULES_DEBUG 223 if (i->empty) 224 printk("empty\n"); 225 else 226 printk("%c%u %u%c\n", 227 i->openmin ? '(' : '[', i->min, 228 i->max, i->openmax ? ')' : ']'); 229 #endif 230 if (changed) 231 params->cmask |= 1 << k; 232 if (changed < 0) 233 return changed; 234 } 235 236 for (k = 0; k < constrs->rules_num; k++) 237 rstamps[k] = 0; 238 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) 239 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0; 240 do { 241 again = 0; 242 for (k = 0; k < constrs->rules_num; k++) { 243 struct snd_pcm_hw_rule *r = &constrs->rules[k]; 244 unsigned int d; 245 int doit = 0; 246 if (r->cond && !(r->cond & params->flags)) 247 continue; 248 for (d = 0; r->deps[d] >= 0; d++) { 249 if (vstamps[r->deps[d]] > rstamps[k]) { 250 doit = 1; 251 break; 252 } 253 } 254 if (!doit) 255 continue; 256 #ifdef RULES_DEBUG 257 printk(KERN_DEBUG "Rule %d [%p]: ", k, r->func); 258 if (r->var >= 0) { 259 printk("%s = ", snd_pcm_hw_param_names[r->var]); 260 if (hw_is_mask(r->var)) { 261 m = hw_param_mask(params, r->var); 262 printk("%x", *m->bits); 263 } else { 264 i = hw_param_interval(params, r->var); 265 if (i->empty) 266 printk("empty"); 267 else 268 printk("%c%u %u%c", 269 i->openmin ? '(' : '[', i->min, 270 i->max, i->openmax ? ')' : ']'); 271 } 272 } 273 #endif 274 changed = r->func(params, r); 275 #ifdef RULES_DEBUG 276 if (r->var >= 0) { 277 printk(" -> "); 278 if (hw_is_mask(r->var)) 279 printk("%x", *m->bits); 280 else { 281 if (i->empty) 282 printk("empty"); 283 else 284 printk("%c%u %u%c", 285 i->openmin ? '(' : '[', i->min, 286 i->max, i->openmax ? ')' : ']'); 287 } 288 } 289 printk("\n"); 290 #endif 291 rstamps[k] = stamp; 292 if (changed && r->var >= 0) { 293 params->cmask |= (1 << r->var); 294 vstamps[r->var] = stamp; 295 again = 1; 296 } 297 if (changed < 0) 298 return changed; 299 stamp++; 300 } 301 } while (again); 302 if (!params->msbits) { 303 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); 304 if (snd_interval_single(i)) 305 params->msbits = snd_interval_value(i); 306 } 307 308 if (!params->rate_den) { 309 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); 310 if (snd_interval_single(i)) { 311 params->rate_num = snd_interval_value(i); 312 params->rate_den = 1; 313 } 314 } 315 316 hw = &substream->runtime->hw; 317 if (!params->info) 318 params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES; 319 if (!params->fifo_size) { 320 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 321 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 322 if (snd_mask_min(m) == snd_mask_max(m) && 323 snd_interval_min(i) == snd_interval_max(i)) { 324 changed = substream->ops->ioctl(substream, 325 SNDRV_PCM_IOCTL1_FIFO_SIZE, params); 326 if (changed < 0) 327 return changed; 328 } 329 } 330 params->rmask = 0; 331 return 0; 332 } 333 334 EXPORT_SYMBOL(snd_pcm_hw_refine); 335 336 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream, 337 struct snd_pcm_hw_params __user * _params) 338 { 339 struct snd_pcm_hw_params *params; 340 int err; 341 342 params = memdup_user(_params, sizeof(*params)); 343 if (IS_ERR(params)) 344 return PTR_ERR(params); 345 346 err = snd_pcm_hw_refine(substream, params); 347 if (copy_to_user(_params, params, sizeof(*params))) { 348 if (!err) 349 err = -EFAULT; 350 } 351 352 kfree(params); 353 return err; 354 } 355 356 static int period_to_usecs(struct snd_pcm_runtime *runtime) 357 { 358 int usecs; 359 360 if (! runtime->rate) 361 return -1; /* invalid */ 362 363 /* take 75% of period time as the deadline */ 364 usecs = (750000 / runtime->rate) * runtime->period_size; 365 usecs += ((750000 % runtime->rate) * runtime->period_size) / 366 runtime->rate; 367 368 return usecs; 369 } 370 371 static int snd_pcm_hw_params(struct snd_pcm_substream *substream, 372 struct snd_pcm_hw_params *params) 373 { 374 struct snd_pcm_runtime *runtime; 375 int err, usecs; 376 unsigned int bits; 377 snd_pcm_uframes_t frames; 378 379 if (PCM_RUNTIME_CHECK(substream)) 380 return -ENXIO; 381 runtime = substream->runtime; 382 snd_pcm_stream_lock_irq(substream); 383 switch (runtime->status->state) { 384 case SNDRV_PCM_STATE_OPEN: 385 case SNDRV_PCM_STATE_SETUP: 386 case SNDRV_PCM_STATE_PREPARED: 387 break; 388 default: 389 snd_pcm_stream_unlock_irq(substream); 390 return -EBADFD; 391 } 392 snd_pcm_stream_unlock_irq(substream); 393 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 394 if (!substream->oss.oss) 395 #endif 396 if (atomic_read(&substream->mmap_count)) 397 return -EBADFD; 398 399 params->rmask = ~0U; 400 err = snd_pcm_hw_refine(substream, params); 401 if (err < 0) 402 goto _error; 403 404 err = snd_pcm_hw_params_choose(substream, params); 405 if (err < 0) 406 goto _error; 407 408 if (substream->ops->hw_params != NULL) { 409 err = substream->ops->hw_params(substream, params); 410 if (err < 0) 411 goto _error; 412 } 413 414 runtime->access = params_access(params); 415 runtime->format = params_format(params); 416 runtime->subformat = params_subformat(params); 417 runtime->channels = params_channels(params); 418 runtime->rate = params_rate(params); 419 runtime->period_size = params_period_size(params); 420 runtime->periods = params_periods(params); 421 runtime->buffer_size = params_buffer_size(params); 422 runtime->info = params->info; 423 runtime->rate_num = params->rate_num; 424 runtime->rate_den = params->rate_den; 425 runtime->no_period_wakeup = 426 (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) && 427 (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP); 428 429 bits = snd_pcm_format_physical_width(runtime->format); 430 runtime->sample_bits = bits; 431 bits *= runtime->channels; 432 runtime->frame_bits = bits; 433 frames = 1; 434 while (bits % 8 != 0) { 435 bits *= 2; 436 frames *= 2; 437 } 438 runtime->byte_align = bits / 8; 439 runtime->min_align = frames; 440 441 /* Default sw params */ 442 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; 443 runtime->period_step = 1; 444 runtime->control->avail_min = runtime->period_size; 445 runtime->start_threshold = 1; 446 runtime->stop_threshold = runtime->buffer_size; 447 runtime->silence_threshold = 0; 448 runtime->silence_size = 0; 449 runtime->boundary = runtime->buffer_size; 450 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size) 451 runtime->boundary *= 2; 452 453 snd_pcm_timer_resolution_change(substream); 454 runtime->status->state = SNDRV_PCM_STATE_SETUP; 455 456 if (pm_qos_request_active(&substream->latency_pm_qos_req)) 457 pm_qos_remove_request(&substream->latency_pm_qos_req); 458 if ((usecs = period_to_usecs(runtime)) >= 0) 459 pm_qos_add_request(&substream->latency_pm_qos_req, 460 PM_QOS_CPU_DMA_LATENCY, usecs); 461 return 0; 462 _error: 463 /* hardware might be unuseable from this time, 464 so we force application to retry to set 465 the correct hardware parameter settings */ 466 runtime->status->state = SNDRV_PCM_STATE_OPEN; 467 if (substream->ops->hw_free != NULL) 468 substream->ops->hw_free(substream); 469 return err; 470 } 471 472 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream, 473 struct snd_pcm_hw_params __user * _params) 474 { 475 struct snd_pcm_hw_params *params; 476 int err; 477 478 params = memdup_user(_params, sizeof(*params)); 479 if (IS_ERR(params)) 480 return PTR_ERR(params); 481 482 err = snd_pcm_hw_params(substream, params); 483 if (copy_to_user(_params, params, sizeof(*params))) { 484 if (!err) 485 err = -EFAULT; 486 } 487 488 kfree(params); 489 return err; 490 } 491 492 static int snd_pcm_hw_free(struct snd_pcm_substream *substream) 493 { 494 struct snd_pcm_runtime *runtime; 495 int result = 0; 496 497 if (PCM_RUNTIME_CHECK(substream)) 498 return -ENXIO; 499 runtime = substream->runtime; 500 snd_pcm_stream_lock_irq(substream); 501 switch (runtime->status->state) { 502 case SNDRV_PCM_STATE_SETUP: 503 case SNDRV_PCM_STATE_PREPARED: 504 break; 505 default: 506 snd_pcm_stream_unlock_irq(substream); 507 return -EBADFD; 508 } 509 snd_pcm_stream_unlock_irq(substream); 510 if (atomic_read(&substream->mmap_count)) 511 return -EBADFD; 512 if (substream->ops->hw_free) 513 result = substream->ops->hw_free(substream); 514 runtime->status->state = SNDRV_PCM_STATE_OPEN; 515 pm_qos_remove_request(&substream->latency_pm_qos_req); 516 return result; 517 } 518 519 static int snd_pcm_sw_params(struct snd_pcm_substream *substream, 520 struct snd_pcm_sw_params *params) 521 { 522 struct snd_pcm_runtime *runtime; 523 int err; 524 525 if (PCM_RUNTIME_CHECK(substream)) 526 return -ENXIO; 527 runtime = substream->runtime; 528 snd_pcm_stream_lock_irq(substream); 529 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 530 snd_pcm_stream_unlock_irq(substream); 531 return -EBADFD; 532 } 533 snd_pcm_stream_unlock_irq(substream); 534 535 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST) 536 return -EINVAL; 537 if (params->avail_min == 0) 538 return -EINVAL; 539 if (params->silence_size >= runtime->boundary) { 540 if (params->silence_threshold != 0) 541 return -EINVAL; 542 } else { 543 if (params->silence_size > params->silence_threshold) 544 return -EINVAL; 545 if (params->silence_threshold > runtime->buffer_size) 546 return -EINVAL; 547 } 548 err = 0; 549 snd_pcm_stream_lock_irq(substream); 550 runtime->tstamp_mode = params->tstamp_mode; 551 runtime->period_step = params->period_step; 552 runtime->control->avail_min = params->avail_min; 553 runtime->start_threshold = params->start_threshold; 554 runtime->stop_threshold = params->stop_threshold; 555 runtime->silence_threshold = params->silence_threshold; 556 runtime->silence_size = params->silence_size; 557 params->boundary = runtime->boundary; 558 if (snd_pcm_running(substream)) { 559 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 560 runtime->silence_size > 0) 561 snd_pcm_playback_silence(substream, ULONG_MAX); 562 err = snd_pcm_update_state(substream, runtime); 563 } 564 snd_pcm_stream_unlock_irq(substream); 565 return err; 566 } 567 568 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream, 569 struct snd_pcm_sw_params __user * _params) 570 { 571 struct snd_pcm_sw_params params; 572 int err; 573 if (copy_from_user(¶ms, _params, sizeof(params))) 574 return -EFAULT; 575 err = snd_pcm_sw_params(substream, ¶ms); 576 if (copy_to_user(_params, ¶ms, sizeof(params))) 577 return -EFAULT; 578 return err; 579 } 580 581 int snd_pcm_status(struct snd_pcm_substream *substream, 582 struct snd_pcm_status *status) 583 { 584 struct snd_pcm_runtime *runtime = substream->runtime; 585 586 snd_pcm_stream_lock_irq(substream); 587 status->state = runtime->status->state; 588 status->suspended_state = runtime->status->suspended_state; 589 if (status->state == SNDRV_PCM_STATE_OPEN) 590 goto _end; 591 status->trigger_tstamp = runtime->trigger_tstamp; 592 if (snd_pcm_running(substream)) { 593 snd_pcm_update_hw_ptr(substream); 594 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { 595 status->tstamp = runtime->status->tstamp; 596 goto _tstamp_end; 597 } 598 } 599 snd_pcm_gettime(runtime, &status->tstamp); 600 _tstamp_end: 601 status->appl_ptr = runtime->control->appl_ptr; 602 status->hw_ptr = runtime->status->hw_ptr; 603 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 604 status->avail = snd_pcm_playback_avail(runtime); 605 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING || 606 runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 607 status->delay = runtime->buffer_size - status->avail; 608 status->delay += runtime->delay; 609 } else 610 status->delay = 0; 611 } else { 612 status->avail = snd_pcm_capture_avail(runtime); 613 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) 614 status->delay = status->avail + runtime->delay; 615 else 616 status->delay = 0; 617 } 618 status->avail_max = runtime->avail_max; 619 status->overrange = runtime->overrange; 620 runtime->avail_max = 0; 621 runtime->overrange = 0; 622 _end: 623 snd_pcm_stream_unlock_irq(substream); 624 return 0; 625 } 626 627 static int snd_pcm_status_user(struct snd_pcm_substream *substream, 628 struct snd_pcm_status __user * _status) 629 { 630 struct snd_pcm_status status; 631 int res; 632 633 memset(&status, 0, sizeof(status)); 634 res = snd_pcm_status(substream, &status); 635 if (res < 0) 636 return res; 637 if (copy_to_user(_status, &status, sizeof(status))) 638 return -EFAULT; 639 return 0; 640 } 641 642 static int snd_pcm_channel_info(struct snd_pcm_substream *substream, 643 struct snd_pcm_channel_info * info) 644 { 645 struct snd_pcm_runtime *runtime; 646 unsigned int channel; 647 648 channel = info->channel; 649 runtime = substream->runtime; 650 snd_pcm_stream_lock_irq(substream); 651 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 652 snd_pcm_stream_unlock_irq(substream); 653 return -EBADFD; 654 } 655 snd_pcm_stream_unlock_irq(substream); 656 if (channel >= runtime->channels) 657 return -EINVAL; 658 memset(info, 0, sizeof(*info)); 659 info->channel = channel; 660 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info); 661 } 662 663 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream, 664 struct snd_pcm_channel_info __user * _info) 665 { 666 struct snd_pcm_channel_info info; 667 int res; 668 669 if (copy_from_user(&info, _info, sizeof(info))) 670 return -EFAULT; 671 res = snd_pcm_channel_info(substream, &info); 672 if (res < 0) 673 return res; 674 if (copy_to_user(_info, &info, sizeof(info))) 675 return -EFAULT; 676 return 0; 677 } 678 679 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream) 680 { 681 struct snd_pcm_runtime *runtime = substream->runtime; 682 if (runtime->trigger_master == NULL) 683 return; 684 if (runtime->trigger_master == substream) { 685 snd_pcm_gettime(runtime, &runtime->trigger_tstamp); 686 } else { 687 snd_pcm_trigger_tstamp(runtime->trigger_master); 688 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp; 689 } 690 runtime->trigger_master = NULL; 691 } 692 693 struct action_ops { 694 int (*pre_action)(struct snd_pcm_substream *substream, int state); 695 int (*do_action)(struct snd_pcm_substream *substream, int state); 696 void (*undo_action)(struct snd_pcm_substream *substream, int state); 697 void (*post_action)(struct snd_pcm_substream *substream, int state); 698 }; 699 700 /* 701 * this functions is core for handling of linked stream 702 * Note: the stream state might be changed also on failure 703 * Note2: call with calling stream lock + link lock 704 */ 705 static int snd_pcm_action_group(struct action_ops *ops, 706 struct snd_pcm_substream *substream, 707 int state, int do_lock) 708 { 709 struct snd_pcm_substream *s = NULL; 710 struct snd_pcm_substream *s1; 711 int res = 0; 712 713 snd_pcm_group_for_each_entry(s, substream) { 714 if (do_lock && s != substream) 715 spin_lock_nested(&s->self_group.lock, 716 SINGLE_DEPTH_NESTING); 717 res = ops->pre_action(s, state); 718 if (res < 0) 719 goto _unlock; 720 } 721 snd_pcm_group_for_each_entry(s, substream) { 722 res = ops->do_action(s, state); 723 if (res < 0) { 724 if (ops->undo_action) { 725 snd_pcm_group_for_each_entry(s1, substream) { 726 if (s1 == s) /* failed stream */ 727 break; 728 ops->undo_action(s1, state); 729 } 730 } 731 s = NULL; /* unlock all */ 732 goto _unlock; 733 } 734 } 735 snd_pcm_group_for_each_entry(s, substream) { 736 ops->post_action(s, state); 737 } 738 _unlock: 739 if (do_lock) { 740 /* unlock streams */ 741 snd_pcm_group_for_each_entry(s1, substream) { 742 if (s1 != substream) 743 spin_unlock(&s1->self_group.lock); 744 if (s1 == s) /* end */ 745 break; 746 } 747 } 748 return res; 749 } 750 751 /* 752 * Note: call with stream lock 753 */ 754 static int snd_pcm_action_single(struct action_ops *ops, 755 struct snd_pcm_substream *substream, 756 int state) 757 { 758 int res; 759 760 res = ops->pre_action(substream, state); 761 if (res < 0) 762 return res; 763 res = ops->do_action(substream, state); 764 if (res == 0) 765 ops->post_action(substream, state); 766 else if (ops->undo_action) 767 ops->undo_action(substream, state); 768 return res; 769 } 770 771 /* 772 * Note: call with stream lock 773 */ 774 static int snd_pcm_action(struct action_ops *ops, 775 struct snd_pcm_substream *substream, 776 int state) 777 { 778 int res; 779 780 if (snd_pcm_stream_linked(substream)) { 781 if (!spin_trylock(&substream->group->lock)) { 782 spin_unlock(&substream->self_group.lock); 783 spin_lock(&substream->group->lock); 784 spin_lock(&substream->self_group.lock); 785 } 786 res = snd_pcm_action_group(ops, substream, state, 1); 787 spin_unlock(&substream->group->lock); 788 } else { 789 res = snd_pcm_action_single(ops, substream, state); 790 } 791 return res; 792 } 793 794 /* 795 * Note: don't use any locks before 796 */ 797 static int snd_pcm_action_lock_irq(struct action_ops *ops, 798 struct snd_pcm_substream *substream, 799 int state) 800 { 801 int res; 802 803 read_lock_irq(&snd_pcm_link_rwlock); 804 if (snd_pcm_stream_linked(substream)) { 805 spin_lock(&substream->group->lock); 806 spin_lock(&substream->self_group.lock); 807 res = snd_pcm_action_group(ops, substream, state, 1); 808 spin_unlock(&substream->self_group.lock); 809 spin_unlock(&substream->group->lock); 810 } else { 811 spin_lock(&substream->self_group.lock); 812 res = snd_pcm_action_single(ops, substream, state); 813 spin_unlock(&substream->self_group.lock); 814 } 815 read_unlock_irq(&snd_pcm_link_rwlock); 816 return res; 817 } 818 819 /* 820 */ 821 static int snd_pcm_action_nonatomic(struct action_ops *ops, 822 struct snd_pcm_substream *substream, 823 int state) 824 { 825 int res; 826 827 down_read(&snd_pcm_link_rwsem); 828 if (snd_pcm_stream_linked(substream)) 829 res = snd_pcm_action_group(ops, substream, state, 0); 830 else 831 res = snd_pcm_action_single(ops, substream, state); 832 up_read(&snd_pcm_link_rwsem); 833 return res; 834 } 835 836 /* 837 * start callbacks 838 */ 839 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state) 840 { 841 struct snd_pcm_runtime *runtime = substream->runtime; 842 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED) 843 return -EBADFD; 844 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 845 !snd_pcm_playback_data(substream)) 846 return -EPIPE; 847 runtime->trigger_master = substream; 848 return 0; 849 } 850 851 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state) 852 { 853 if (substream->runtime->trigger_master != substream) 854 return 0; 855 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START); 856 } 857 858 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state) 859 { 860 if (substream->runtime->trigger_master == substream) 861 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); 862 } 863 864 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state) 865 { 866 struct snd_pcm_runtime *runtime = substream->runtime; 867 snd_pcm_trigger_tstamp(substream); 868 runtime->hw_ptr_jiffies = jiffies; 869 runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) / 870 runtime->rate; 871 runtime->status->state = state; 872 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 873 runtime->silence_size > 0) 874 snd_pcm_playback_silence(substream, ULONG_MAX); 875 if (substream->timer) 876 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART, 877 &runtime->trigger_tstamp); 878 } 879 880 static struct action_ops snd_pcm_action_start = { 881 .pre_action = snd_pcm_pre_start, 882 .do_action = snd_pcm_do_start, 883 .undo_action = snd_pcm_undo_start, 884 .post_action = snd_pcm_post_start 885 }; 886 887 /** 888 * snd_pcm_start - start all linked streams 889 * @substream: the PCM substream instance 890 */ 891 int snd_pcm_start(struct snd_pcm_substream *substream) 892 { 893 return snd_pcm_action(&snd_pcm_action_start, substream, 894 SNDRV_PCM_STATE_RUNNING); 895 } 896 897 /* 898 * stop callbacks 899 */ 900 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state) 901 { 902 struct snd_pcm_runtime *runtime = substream->runtime; 903 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 904 return -EBADFD; 905 runtime->trigger_master = substream; 906 return 0; 907 } 908 909 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state) 910 { 911 if (substream->runtime->trigger_master == substream && 912 snd_pcm_running(substream)) 913 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); 914 return 0; /* unconditonally stop all substreams */ 915 } 916 917 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state) 918 { 919 struct snd_pcm_runtime *runtime = substream->runtime; 920 if (runtime->status->state != state) { 921 snd_pcm_trigger_tstamp(substream); 922 if (substream->timer) 923 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP, 924 &runtime->trigger_tstamp); 925 runtime->status->state = state; 926 } 927 wake_up(&runtime->sleep); 928 wake_up(&runtime->tsleep); 929 } 930 931 static struct action_ops snd_pcm_action_stop = { 932 .pre_action = snd_pcm_pre_stop, 933 .do_action = snd_pcm_do_stop, 934 .post_action = snd_pcm_post_stop 935 }; 936 937 /** 938 * snd_pcm_stop - try to stop all running streams in the substream group 939 * @substream: the PCM substream instance 940 * @state: PCM state after stopping the stream 941 * 942 * The state of each stream is then changed to the given state unconditionally. 943 */ 944 int snd_pcm_stop(struct snd_pcm_substream *substream, int state) 945 { 946 return snd_pcm_action(&snd_pcm_action_stop, substream, state); 947 } 948 949 EXPORT_SYMBOL(snd_pcm_stop); 950 951 /** 952 * snd_pcm_drain_done - stop the DMA only when the given stream is playback 953 * @substream: the PCM substream 954 * 955 * After stopping, the state is changed to SETUP. 956 * Unlike snd_pcm_stop(), this affects only the given stream. 957 */ 958 int snd_pcm_drain_done(struct snd_pcm_substream *substream) 959 { 960 return snd_pcm_action_single(&snd_pcm_action_stop, substream, 961 SNDRV_PCM_STATE_SETUP); 962 } 963 964 /* 965 * pause callbacks 966 */ 967 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push) 968 { 969 struct snd_pcm_runtime *runtime = substream->runtime; 970 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE)) 971 return -ENOSYS; 972 if (push) { 973 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING) 974 return -EBADFD; 975 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED) 976 return -EBADFD; 977 runtime->trigger_master = substream; 978 return 0; 979 } 980 981 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push) 982 { 983 if (substream->runtime->trigger_master != substream) 984 return 0; 985 /* some drivers might use hw_ptr to recover from the pause - 986 update the hw_ptr now */ 987 if (push) 988 snd_pcm_update_hw_ptr(substream); 989 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by 990 * a delta between the current jiffies, this gives a large enough 991 * delta, effectively to skip the check once. 992 */ 993 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000; 994 return substream->ops->trigger(substream, 995 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH : 996 SNDRV_PCM_TRIGGER_PAUSE_RELEASE); 997 } 998 999 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push) 1000 { 1001 if (substream->runtime->trigger_master == substream) 1002 substream->ops->trigger(substream, 1003 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE : 1004 SNDRV_PCM_TRIGGER_PAUSE_PUSH); 1005 } 1006 1007 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push) 1008 { 1009 struct snd_pcm_runtime *runtime = substream->runtime; 1010 snd_pcm_trigger_tstamp(substream); 1011 if (push) { 1012 runtime->status->state = SNDRV_PCM_STATE_PAUSED; 1013 if (substream->timer) 1014 snd_timer_notify(substream->timer, 1015 SNDRV_TIMER_EVENT_MPAUSE, 1016 &runtime->trigger_tstamp); 1017 wake_up(&runtime->sleep); 1018 wake_up(&runtime->tsleep); 1019 } else { 1020 runtime->status->state = SNDRV_PCM_STATE_RUNNING; 1021 if (substream->timer) 1022 snd_timer_notify(substream->timer, 1023 SNDRV_TIMER_EVENT_MCONTINUE, 1024 &runtime->trigger_tstamp); 1025 } 1026 } 1027 1028 static struct action_ops snd_pcm_action_pause = { 1029 .pre_action = snd_pcm_pre_pause, 1030 .do_action = snd_pcm_do_pause, 1031 .undo_action = snd_pcm_undo_pause, 1032 .post_action = snd_pcm_post_pause 1033 }; 1034 1035 /* 1036 * Push/release the pause for all linked streams. 1037 */ 1038 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push) 1039 { 1040 return snd_pcm_action(&snd_pcm_action_pause, substream, push); 1041 } 1042 1043 #ifdef CONFIG_PM 1044 /* suspend */ 1045 1046 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state) 1047 { 1048 struct snd_pcm_runtime *runtime = substream->runtime; 1049 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1050 return -EBUSY; 1051 runtime->trigger_master = substream; 1052 return 0; 1053 } 1054 1055 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state) 1056 { 1057 struct snd_pcm_runtime *runtime = substream->runtime; 1058 if (runtime->trigger_master != substream) 1059 return 0; 1060 if (! snd_pcm_running(substream)) 1061 return 0; 1062 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); 1063 return 0; /* suspend unconditionally */ 1064 } 1065 1066 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state) 1067 { 1068 struct snd_pcm_runtime *runtime = substream->runtime; 1069 snd_pcm_trigger_tstamp(substream); 1070 if (substream->timer) 1071 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND, 1072 &runtime->trigger_tstamp); 1073 runtime->status->suspended_state = runtime->status->state; 1074 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED; 1075 wake_up(&runtime->sleep); 1076 wake_up(&runtime->tsleep); 1077 } 1078 1079 static struct action_ops snd_pcm_action_suspend = { 1080 .pre_action = snd_pcm_pre_suspend, 1081 .do_action = snd_pcm_do_suspend, 1082 .post_action = snd_pcm_post_suspend 1083 }; 1084 1085 /** 1086 * snd_pcm_suspend - trigger SUSPEND to all linked streams 1087 * @substream: the PCM substream 1088 * 1089 * After this call, all streams are changed to SUSPENDED state. 1090 */ 1091 int snd_pcm_suspend(struct snd_pcm_substream *substream) 1092 { 1093 int err; 1094 unsigned long flags; 1095 1096 if (! substream) 1097 return 0; 1098 1099 snd_pcm_stream_lock_irqsave(substream, flags); 1100 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0); 1101 snd_pcm_stream_unlock_irqrestore(substream, flags); 1102 return err; 1103 } 1104 1105 EXPORT_SYMBOL(snd_pcm_suspend); 1106 1107 /** 1108 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm 1109 * @pcm: the PCM instance 1110 * 1111 * After this call, all streams are changed to SUSPENDED state. 1112 */ 1113 int snd_pcm_suspend_all(struct snd_pcm *pcm) 1114 { 1115 struct snd_pcm_substream *substream; 1116 int stream, err = 0; 1117 1118 if (! pcm) 1119 return 0; 1120 1121 for (stream = 0; stream < 2; stream++) { 1122 for (substream = pcm->streams[stream].substream; 1123 substream; substream = substream->next) { 1124 /* FIXME: the open/close code should lock this as well */ 1125 if (substream->runtime == NULL) 1126 continue; 1127 err = snd_pcm_suspend(substream); 1128 if (err < 0 && err != -EBUSY) 1129 return err; 1130 } 1131 } 1132 return 0; 1133 } 1134 1135 EXPORT_SYMBOL(snd_pcm_suspend_all); 1136 1137 /* resume */ 1138 1139 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state) 1140 { 1141 struct snd_pcm_runtime *runtime = substream->runtime; 1142 if (!(runtime->info & SNDRV_PCM_INFO_RESUME)) 1143 return -ENOSYS; 1144 runtime->trigger_master = substream; 1145 return 0; 1146 } 1147 1148 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state) 1149 { 1150 struct snd_pcm_runtime *runtime = substream->runtime; 1151 if (runtime->trigger_master != substream) 1152 return 0; 1153 /* DMA not running previously? */ 1154 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING && 1155 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING || 1156 substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) 1157 return 0; 1158 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME); 1159 } 1160 1161 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state) 1162 { 1163 if (substream->runtime->trigger_master == substream && 1164 snd_pcm_running(substream)) 1165 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); 1166 } 1167 1168 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state) 1169 { 1170 struct snd_pcm_runtime *runtime = substream->runtime; 1171 snd_pcm_trigger_tstamp(substream); 1172 if (substream->timer) 1173 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME, 1174 &runtime->trigger_tstamp); 1175 runtime->status->state = runtime->status->suspended_state; 1176 } 1177 1178 static struct action_ops snd_pcm_action_resume = { 1179 .pre_action = snd_pcm_pre_resume, 1180 .do_action = snd_pcm_do_resume, 1181 .undo_action = snd_pcm_undo_resume, 1182 .post_action = snd_pcm_post_resume 1183 }; 1184 1185 static int snd_pcm_resume(struct snd_pcm_substream *substream) 1186 { 1187 struct snd_card *card = substream->pcm->card; 1188 int res; 1189 1190 snd_power_lock(card); 1191 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) 1192 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0); 1193 snd_power_unlock(card); 1194 return res; 1195 } 1196 1197 #else 1198 1199 static int snd_pcm_resume(struct snd_pcm_substream *substream) 1200 { 1201 return -ENOSYS; 1202 } 1203 1204 #endif /* CONFIG_PM */ 1205 1206 /* 1207 * xrun ioctl 1208 * 1209 * Change the RUNNING stream(s) to XRUN state. 1210 */ 1211 static int snd_pcm_xrun(struct snd_pcm_substream *substream) 1212 { 1213 struct snd_card *card = substream->pcm->card; 1214 struct snd_pcm_runtime *runtime = substream->runtime; 1215 int result; 1216 1217 snd_power_lock(card); 1218 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1219 result = snd_power_wait(card, SNDRV_CTL_POWER_D0); 1220 if (result < 0) 1221 goto _unlock; 1222 } 1223 1224 snd_pcm_stream_lock_irq(substream); 1225 switch (runtime->status->state) { 1226 case SNDRV_PCM_STATE_XRUN: 1227 result = 0; /* already there */ 1228 break; 1229 case SNDRV_PCM_STATE_RUNNING: 1230 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); 1231 break; 1232 default: 1233 result = -EBADFD; 1234 } 1235 snd_pcm_stream_unlock_irq(substream); 1236 _unlock: 1237 snd_power_unlock(card); 1238 return result; 1239 } 1240 1241 /* 1242 * reset ioctl 1243 */ 1244 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state) 1245 { 1246 struct snd_pcm_runtime *runtime = substream->runtime; 1247 switch (runtime->status->state) { 1248 case SNDRV_PCM_STATE_RUNNING: 1249 case SNDRV_PCM_STATE_PREPARED: 1250 case SNDRV_PCM_STATE_PAUSED: 1251 case SNDRV_PCM_STATE_SUSPENDED: 1252 return 0; 1253 default: 1254 return -EBADFD; 1255 } 1256 } 1257 1258 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state) 1259 { 1260 struct snd_pcm_runtime *runtime = substream->runtime; 1261 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL); 1262 if (err < 0) 1263 return err; 1264 runtime->hw_ptr_base = 0; 1265 runtime->hw_ptr_interrupt = runtime->status->hw_ptr - 1266 runtime->status->hw_ptr % runtime->period_size; 1267 runtime->silence_start = runtime->status->hw_ptr; 1268 runtime->silence_filled = 0; 1269 return 0; 1270 } 1271 1272 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state) 1273 { 1274 struct snd_pcm_runtime *runtime = substream->runtime; 1275 runtime->control->appl_ptr = runtime->status->hw_ptr; 1276 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 1277 runtime->silence_size > 0) 1278 snd_pcm_playback_silence(substream, ULONG_MAX); 1279 } 1280 1281 static struct action_ops snd_pcm_action_reset = { 1282 .pre_action = snd_pcm_pre_reset, 1283 .do_action = snd_pcm_do_reset, 1284 .post_action = snd_pcm_post_reset 1285 }; 1286 1287 static int snd_pcm_reset(struct snd_pcm_substream *substream) 1288 { 1289 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0); 1290 } 1291 1292 /* 1293 * prepare ioctl 1294 */ 1295 /* we use the second argument for updating f_flags */ 1296 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream, 1297 int f_flags) 1298 { 1299 struct snd_pcm_runtime *runtime = substream->runtime; 1300 if (runtime->status->state == SNDRV_PCM_STATE_OPEN || 1301 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED) 1302 return -EBADFD; 1303 if (snd_pcm_running(substream)) 1304 return -EBUSY; 1305 substream->f_flags = f_flags; 1306 return 0; 1307 } 1308 1309 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state) 1310 { 1311 int err; 1312 err = substream->ops->prepare(substream); 1313 if (err < 0) 1314 return err; 1315 return snd_pcm_do_reset(substream, 0); 1316 } 1317 1318 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state) 1319 { 1320 struct snd_pcm_runtime *runtime = substream->runtime; 1321 runtime->control->appl_ptr = runtime->status->hw_ptr; 1322 runtime->status->state = SNDRV_PCM_STATE_PREPARED; 1323 } 1324 1325 static struct action_ops snd_pcm_action_prepare = { 1326 .pre_action = snd_pcm_pre_prepare, 1327 .do_action = snd_pcm_do_prepare, 1328 .post_action = snd_pcm_post_prepare 1329 }; 1330 1331 /** 1332 * snd_pcm_prepare - prepare the PCM substream to be triggerable 1333 * @substream: the PCM substream instance 1334 * @file: file to refer f_flags 1335 */ 1336 static int snd_pcm_prepare(struct snd_pcm_substream *substream, 1337 struct file *file) 1338 { 1339 int res; 1340 struct snd_card *card = substream->pcm->card; 1341 int f_flags; 1342 1343 if (file) 1344 f_flags = file->f_flags; 1345 else 1346 f_flags = substream->f_flags; 1347 1348 snd_power_lock(card); 1349 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) 1350 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare, 1351 substream, f_flags); 1352 snd_power_unlock(card); 1353 return res; 1354 } 1355 1356 /* 1357 * drain ioctl 1358 */ 1359 1360 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state) 1361 { 1362 substream->runtime->trigger_master = substream; 1363 return 0; 1364 } 1365 1366 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state) 1367 { 1368 struct snd_pcm_runtime *runtime = substream->runtime; 1369 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 1370 switch (runtime->status->state) { 1371 case SNDRV_PCM_STATE_PREPARED: 1372 /* start playback stream if possible */ 1373 if (! snd_pcm_playback_empty(substream)) { 1374 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING); 1375 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING); 1376 } 1377 break; 1378 case SNDRV_PCM_STATE_RUNNING: 1379 runtime->status->state = SNDRV_PCM_STATE_DRAINING; 1380 break; 1381 default: 1382 break; 1383 } 1384 } else { 1385 /* stop running stream */ 1386 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) { 1387 int new_state = snd_pcm_capture_avail(runtime) > 0 ? 1388 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP; 1389 snd_pcm_do_stop(substream, new_state); 1390 snd_pcm_post_stop(substream, new_state); 1391 } 1392 } 1393 return 0; 1394 } 1395 1396 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state) 1397 { 1398 } 1399 1400 static struct action_ops snd_pcm_action_drain_init = { 1401 .pre_action = snd_pcm_pre_drain_init, 1402 .do_action = snd_pcm_do_drain_init, 1403 .post_action = snd_pcm_post_drain_init 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 struct file *file) 1417 { 1418 struct snd_card *card; 1419 struct snd_pcm_runtime *runtime; 1420 struct snd_pcm_substream *s; 1421 wait_queue_t wait; 1422 int result = 0; 1423 int nonblock = 0; 1424 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 if (file) { 1441 if (file->f_flags & O_NONBLOCK) 1442 nonblock = 1; 1443 } else if (substream->f_flags & O_NONBLOCK) 1444 nonblock = 1; 1445 1446 down_read(&snd_pcm_link_rwsem); 1447 snd_pcm_stream_lock_irq(substream); 1448 /* resume pause */ 1449 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) 1450 snd_pcm_pause(substream, 0); 1451 1452 /* pre-start/stop - all running streams are changed to DRAINING state */ 1453 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0); 1454 if (result < 0) 1455 goto unlock; 1456 /* in non-blocking, we don't wait in ioctl but let caller poll */ 1457 if (nonblock) { 1458 result = -EAGAIN; 1459 goto unlock; 1460 } 1461 1462 for (;;) { 1463 long tout; 1464 struct snd_pcm_runtime *to_check; 1465 if (signal_pending(current)) { 1466 result = -ERESTARTSYS; 1467 break; 1468 } 1469 /* find a substream to drain */ 1470 to_check = NULL; 1471 snd_pcm_group_for_each_entry(s, substream) { 1472 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK) 1473 continue; 1474 runtime = s->runtime; 1475 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 1476 to_check = runtime; 1477 break; 1478 } 1479 } 1480 if (!to_check) 1481 break; /* all drained */ 1482 init_waitqueue_entry(&wait, current); 1483 add_wait_queue(&to_check->sleep, &wait); 1484 set_current_state(TASK_INTERRUPTIBLE); 1485 snd_pcm_stream_unlock_irq(substream); 1486 up_read(&snd_pcm_link_rwsem); 1487 snd_power_unlock(card); 1488 tout = schedule_timeout(10 * HZ); 1489 snd_power_lock(card); 1490 down_read(&snd_pcm_link_rwsem); 1491 snd_pcm_stream_lock_irq(substream); 1492 remove_wait_queue(&to_check->sleep, &wait); 1493 if (tout == 0) { 1494 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1495 result = -ESTRPIPE; 1496 else { 1497 snd_printd("playback drain error (DMA or IRQ trouble?)\n"); 1498 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1499 result = -EIO; 1500 } 1501 break; 1502 } 1503 } 1504 1505 unlock: 1506 snd_pcm_stream_unlock_irq(substream); 1507 up_read(&snd_pcm_link_rwsem); 1508 snd_power_unlock(card); 1509 1510 return result; 1511 } 1512 1513 /* 1514 * drop ioctl 1515 * 1516 * Immediately put all linked substreams into SETUP state. 1517 */ 1518 static int snd_pcm_drop(struct snd_pcm_substream *substream) 1519 { 1520 struct snd_pcm_runtime *runtime; 1521 struct snd_card *card; 1522 int result = 0; 1523 1524 if (PCM_RUNTIME_CHECK(substream)) 1525 return -ENXIO; 1526 runtime = substream->runtime; 1527 card = substream->pcm->card; 1528 1529 if (runtime->status->state == SNDRV_PCM_STATE_OPEN || 1530 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED || 1531 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1532 return -EBADFD; 1533 1534 snd_pcm_stream_lock_irq(substream); 1535 /* resume pause */ 1536 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) 1537 snd_pcm_pause(substream, 0); 1538 1539 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1540 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */ 1541 snd_pcm_stream_unlock_irq(substream); 1542 1543 return result; 1544 } 1545 1546 1547 /* WARNING: Don't forget to fput back the file */ 1548 static struct file *snd_pcm_file_fd(int fd) 1549 { 1550 struct file *file; 1551 struct inode *inode; 1552 unsigned int minor; 1553 1554 file = fget(fd); 1555 if (!file) 1556 return NULL; 1557 inode = file->f_path.dentry->d_inode; 1558 if (!S_ISCHR(inode->i_mode) || 1559 imajor(inode) != snd_major) { 1560 fput(file); 1561 return NULL; 1562 } 1563 minor = iminor(inode); 1564 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) && 1565 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) { 1566 fput(file); 1567 return NULL; 1568 } 1569 return file; 1570 } 1571 1572 /* 1573 * PCM link handling 1574 */ 1575 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd) 1576 { 1577 int res = 0; 1578 struct file *file; 1579 struct snd_pcm_file *pcm_file; 1580 struct snd_pcm_substream *substream1; 1581 1582 file = snd_pcm_file_fd(fd); 1583 if (!file) 1584 return -EBADFD; 1585 pcm_file = file->private_data; 1586 substream1 = pcm_file->substream; 1587 down_write(&snd_pcm_link_rwsem); 1588 write_lock_irq(&snd_pcm_link_rwlock); 1589 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN || 1590 substream->runtime->status->state != substream1->runtime->status->state) { 1591 res = -EBADFD; 1592 goto _end; 1593 } 1594 if (snd_pcm_stream_linked(substream1)) { 1595 res = -EALREADY; 1596 goto _end; 1597 } 1598 if (!snd_pcm_stream_linked(substream)) { 1599 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC); 1600 if (substream->group == NULL) { 1601 res = -ENOMEM; 1602 goto _end; 1603 } 1604 spin_lock_init(&substream->group->lock); 1605 INIT_LIST_HEAD(&substream->group->substreams); 1606 list_add_tail(&substream->link_list, &substream->group->substreams); 1607 substream->group->count = 1; 1608 } 1609 list_add_tail(&substream1->link_list, &substream->group->substreams); 1610 substream->group->count++; 1611 substream1->group = substream->group; 1612 _end: 1613 write_unlock_irq(&snd_pcm_link_rwlock); 1614 up_write(&snd_pcm_link_rwsem); 1615 fput(file); 1616 return res; 1617 } 1618 1619 static void relink_to_local(struct snd_pcm_substream *substream) 1620 { 1621 substream->group = &substream->self_group; 1622 INIT_LIST_HEAD(&substream->self_group.substreams); 1623 list_add_tail(&substream->link_list, &substream->self_group.substreams); 1624 } 1625 1626 static int snd_pcm_unlink(struct snd_pcm_substream *substream) 1627 { 1628 struct snd_pcm_substream *s; 1629 int res = 0; 1630 1631 down_write(&snd_pcm_link_rwsem); 1632 write_lock_irq(&snd_pcm_link_rwlock); 1633 if (!snd_pcm_stream_linked(substream)) { 1634 res = -EALREADY; 1635 goto _end; 1636 } 1637 list_del(&substream->link_list); 1638 substream->group->count--; 1639 if (substream->group->count == 1) { /* detach the last stream, too */ 1640 snd_pcm_group_for_each_entry(s, substream) { 1641 relink_to_local(s); 1642 break; 1643 } 1644 kfree(substream->group); 1645 } 1646 relink_to_local(substream); 1647 _end: 1648 write_unlock_irq(&snd_pcm_link_rwlock); 1649 up_write(&snd_pcm_link_rwsem); 1650 return res; 1651 } 1652 1653 /* 1654 * hw configurator 1655 */ 1656 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params, 1657 struct snd_pcm_hw_rule *rule) 1658 { 1659 struct snd_interval t; 1660 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]), 1661 hw_param_interval_c(params, rule->deps[1]), &t); 1662 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1663 } 1664 1665 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params, 1666 struct snd_pcm_hw_rule *rule) 1667 { 1668 struct snd_interval t; 1669 snd_interval_div(hw_param_interval_c(params, rule->deps[0]), 1670 hw_param_interval_c(params, rule->deps[1]), &t); 1671 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1672 } 1673 1674 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params, 1675 struct snd_pcm_hw_rule *rule) 1676 { 1677 struct snd_interval t; 1678 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]), 1679 hw_param_interval_c(params, rule->deps[1]), 1680 (unsigned long) rule->private, &t); 1681 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1682 } 1683 1684 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params, 1685 struct snd_pcm_hw_rule *rule) 1686 { 1687 struct snd_interval t; 1688 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]), 1689 (unsigned long) rule->private, 1690 hw_param_interval_c(params, rule->deps[1]), &t); 1691 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1692 } 1693 1694 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params, 1695 struct snd_pcm_hw_rule *rule) 1696 { 1697 unsigned int k; 1698 struct snd_interval *i = hw_param_interval(params, rule->deps[0]); 1699 struct snd_mask m; 1700 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 1701 snd_mask_any(&m); 1702 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { 1703 int bits; 1704 if (! snd_mask_test(mask, k)) 1705 continue; 1706 bits = snd_pcm_format_physical_width(k); 1707 if (bits <= 0) 1708 continue; /* ignore invalid formats */ 1709 if ((unsigned)bits < i->min || (unsigned)bits > i->max) 1710 snd_mask_reset(&m, k); 1711 } 1712 return snd_mask_refine(mask, &m); 1713 } 1714 1715 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params, 1716 struct snd_pcm_hw_rule *rule) 1717 { 1718 struct snd_interval t; 1719 unsigned int k; 1720 t.min = UINT_MAX; 1721 t.max = 0; 1722 t.openmin = 0; 1723 t.openmax = 0; 1724 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { 1725 int bits; 1726 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k)) 1727 continue; 1728 bits = snd_pcm_format_physical_width(k); 1729 if (bits <= 0) 1730 continue; /* ignore invalid formats */ 1731 if (t.min > (unsigned)bits) 1732 t.min = bits; 1733 if (t.max < (unsigned)bits) 1734 t.max = bits; 1735 } 1736 t.integer = 1; 1737 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1738 } 1739 1740 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12 1741 #error "Change this table" 1742 #endif 1743 1744 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100, 1745 48000, 64000, 88200, 96000, 176400, 192000 }; 1746 1747 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = { 1748 .count = ARRAY_SIZE(rates), 1749 .list = rates, 1750 }; 1751 1752 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params, 1753 struct snd_pcm_hw_rule *rule) 1754 { 1755 struct snd_pcm_hardware *hw = rule->private; 1756 return snd_interval_list(hw_param_interval(params, rule->var), 1757 snd_pcm_known_rates.count, 1758 snd_pcm_known_rates.list, hw->rates); 1759 } 1760 1761 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params, 1762 struct snd_pcm_hw_rule *rule) 1763 { 1764 struct snd_interval t; 1765 struct snd_pcm_substream *substream = rule->private; 1766 t.min = 0; 1767 t.max = substream->buffer_bytes_max; 1768 t.openmin = 0; 1769 t.openmax = 0; 1770 t.integer = 1; 1771 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1772 } 1773 1774 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream) 1775 { 1776 struct snd_pcm_runtime *runtime = substream->runtime; 1777 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; 1778 int k, err; 1779 1780 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { 1781 snd_mask_any(constrs_mask(constrs, k)); 1782 } 1783 1784 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { 1785 snd_interval_any(constrs_interval(constrs, k)); 1786 } 1787 1788 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS)); 1789 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)); 1790 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)); 1791 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)); 1792 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS)); 1793 1794 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, 1795 snd_pcm_hw_rule_format, NULL, 1796 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1797 if (err < 0) 1798 return err; 1799 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 1800 snd_pcm_hw_rule_sample_bits, NULL, 1801 SNDRV_PCM_HW_PARAM_FORMAT, 1802 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1803 if (err < 0) 1804 return err; 1805 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 1806 snd_pcm_hw_rule_div, NULL, 1807 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); 1808 if (err < 0) 1809 return err; 1810 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1811 snd_pcm_hw_rule_mul, NULL, 1812 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); 1813 if (err < 0) 1814 return err; 1815 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1816 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1817 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 1818 if (err < 0) 1819 return err; 1820 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1821 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1822 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1); 1823 if (err < 0) 1824 return err; 1825 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 1826 snd_pcm_hw_rule_div, NULL, 1827 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1828 if (err < 0) 1829 return err; 1830 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1831 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1832 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1); 1833 if (err < 0) 1834 return err; 1835 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1836 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1837 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1); 1838 if (err < 0) 1839 return err; 1840 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, 1841 snd_pcm_hw_rule_div, NULL, 1842 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 1843 if (err < 0) 1844 return err; 1845 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1846 snd_pcm_hw_rule_div, NULL, 1847 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); 1848 if (err < 0) 1849 return err; 1850 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1851 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1852 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1853 if (err < 0) 1854 return err; 1855 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1856 snd_pcm_hw_rule_muldivk, (void*) 1000000, 1857 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); 1858 if (err < 0) 1859 return err; 1860 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1861 snd_pcm_hw_rule_mul, NULL, 1862 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); 1863 if (err < 0) 1864 return err; 1865 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1866 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1867 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1868 if (err < 0) 1869 return err; 1870 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1871 snd_pcm_hw_rule_muldivk, (void*) 1000000, 1872 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); 1873 if (err < 0) 1874 return err; 1875 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 1876 snd_pcm_hw_rule_muldivk, (void*) 8, 1877 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1878 if (err < 0) 1879 return err; 1880 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1881 snd_pcm_hw_rule_muldivk, (void*) 8, 1882 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1883 if (err < 0) 1884 return err; 1885 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 1886 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1887 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); 1888 if (err < 0) 1889 return err; 1890 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME, 1891 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1892 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); 1893 if (err < 0) 1894 return err; 1895 return 0; 1896 } 1897 1898 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream) 1899 { 1900 struct snd_pcm_runtime *runtime = substream->runtime; 1901 struct snd_pcm_hardware *hw = &runtime->hw; 1902 int err; 1903 unsigned int mask = 0; 1904 1905 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) 1906 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED; 1907 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) 1908 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED; 1909 if (hw->info & SNDRV_PCM_INFO_MMAP) { 1910 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) 1911 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; 1912 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) 1913 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED; 1914 if (hw->info & SNDRV_PCM_INFO_COMPLEX) 1915 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX; 1916 } 1917 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask); 1918 if (err < 0) 1919 return err; 1920 1921 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats); 1922 if (err < 0) 1923 return err; 1924 1925 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD); 1926 if (err < 0) 1927 return err; 1928 1929 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, 1930 hw->channels_min, hw->channels_max); 1931 if (err < 0) 1932 return err; 1933 1934 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE, 1935 hw->rate_min, hw->rate_max); 1936 if (err < 0) 1937 return err; 1938 1939 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 1940 hw->period_bytes_min, hw->period_bytes_max); 1941 if (err < 0) 1942 return err; 1943 1944 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS, 1945 hw->periods_min, hw->periods_max); 1946 if (err < 0) 1947 return err; 1948 1949 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1950 hw->period_bytes_min, hw->buffer_bytes_max); 1951 if (err < 0) 1952 return err; 1953 1954 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1955 snd_pcm_hw_rule_buffer_bytes_max, substream, 1956 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1); 1957 if (err < 0) 1958 return err; 1959 1960 /* FIXME: remove */ 1961 if (runtime->dma_bytes) { 1962 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes); 1963 if (err < 0) 1964 return -EINVAL; 1965 } 1966 1967 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) { 1968 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1969 snd_pcm_hw_rule_rate, hw, 1970 SNDRV_PCM_HW_PARAM_RATE, -1); 1971 if (err < 0) 1972 return err; 1973 } 1974 1975 /* FIXME: this belong to lowlevel */ 1976 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE); 1977 1978 return 0; 1979 } 1980 1981 static void pcm_release_private(struct snd_pcm_substream *substream) 1982 { 1983 snd_pcm_unlink(substream); 1984 } 1985 1986 void snd_pcm_release_substream(struct snd_pcm_substream *substream) 1987 { 1988 substream->ref_count--; 1989 if (substream->ref_count > 0) 1990 return; 1991 1992 snd_pcm_drop(substream); 1993 if (substream->hw_opened) { 1994 if (substream->ops->hw_free != NULL) 1995 substream->ops->hw_free(substream); 1996 substream->ops->close(substream); 1997 substream->hw_opened = 0; 1998 } 1999 if (pm_qos_request_active(&substream->latency_pm_qos_req)) 2000 pm_qos_remove_request(&substream->latency_pm_qos_req); 2001 if (substream->pcm_release) { 2002 substream->pcm_release(substream); 2003 substream->pcm_release = NULL; 2004 } 2005 snd_pcm_detach_substream(substream); 2006 } 2007 2008 EXPORT_SYMBOL(snd_pcm_release_substream); 2009 2010 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, 2011 struct file *file, 2012 struct snd_pcm_substream **rsubstream) 2013 { 2014 struct snd_pcm_substream *substream; 2015 int err; 2016 2017 err = snd_pcm_attach_substream(pcm, stream, file, &substream); 2018 if (err < 0) 2019 return err; 2020 if (substream->ref_count > 1) { 2021 *rsubstream = substream; 2022 return 0; 2023 } 2024 2025 err = snd_pcm_hw_constraints_init(substream); 2026 if (err < 0) { 2027 snd_printd("snd_pcm_hw_constraints_init failed\n"); 2028 goto error; 2029 } 2030 2031 if ((err = substream->ops->open(substream)) < 0) 2032 goto error; 2033 2034 substream->hw_opened = 1; 2035 2036 err = snd_pcm_hw_constraints_complete(substream); 2037 if (err < 0) { 2038 snd_printd("snd_pcm_hw_constraints_complete failed\n"); 2039 goto error; 2040 } 2041 2042 *rsubstream = substream; 2043 return 0; 2044 2045 error: 2046 snd_pcm_release_substream(substream); 2047 return err; 2048 } 2049 2050 EXPORT_SYMBOL(snd_pcm_open_substream); 2051 2052 static int snd_pcm_open_file(struct file *file, 2053 struct snd_pcm *pcm, 2054 int stream, 2055 struct snd_pcm_file **rpcm_file) 2056 { 2057 struct snd_pcm_file *pcm_file; 2058 struct snd_pcm_substream *substream; 2059 struct snd_pcm_str *str; 2060 int err; 2061 2062 if (rpcm_file) 2063 *rpcm_file = NULL; 2064 2065 err = snd_pcm_open_substream(pcm, stream, file, &substream); 2066 if (err < 0) 2067 return err; 2068 2069 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL); 2070 if (pcm_file == NULL) { 2071 snd_pcm_release_substream(substream); 2072 return -ENOMEM; 2073 } 2074 pcm_file->substream = substream; 2075 if (substream->ref_count == 1) { 2076 str = substream->pstr; 2077 substream->file = pcm_file; 2078 substream->pcm_release = pcm_release_private; 2079 } 2080 file->private_data = pcm_file; 2081 if (rpcm_file) 2082 *rpcm_file = pcm_file; 2083 return 0; 2084 } 2085 2086 static int snd_pcm_playback_open(struct inode *inode, struct file *file) 2087 { 2088 struct snd_pcm *pcm; 2089 int err = nonseekable_open(inode, file); 2090 if (err < 0) 2091 return err; 2092 pcm = snd_lookup_minor_data(iminor(inode), 2093 SNDRV_DEVICE_TYPE_PCM_PLAYBACK); 2094 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK); 2095 } 2096 2097 static int snd_pcm_capture_open(struct inode *inode, struct file *file) 2098 { 2099 struct snd_pcm *pcm; 2100 int err = nonseekable_open(inode, file); 2101 if (err < 0) 2102 return err; 2103 pcm = snd_lookup_minor_data(iminor(inode), 2104 SNDRV_DEVICE_TYPE_PCM_CAPTURE); 2105 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE); 2106 } 2107 2108 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream) 2109 { 2110 int err; 2111 struct snd_pcm_file *pcm_file; 2112 wait_queue_t wait; 2113 2114 if (pcm == NULL) { 2115 err = -ENODEV; 2116 goto __error1; 2117 } 2118 err = snd_card_file_add(pcm->card, file); 2119 if (err < 0) 2120 goto __error1; 2121 if (!try_module_get(pcm->card->module)) { 2122 err = -EFAULT; 2123 goto __error2; 2124 } 2125 init_waitqueue_entry(&wait, current); 2126 add_wait_queue(&pcm->open_wait, &wait); 2127 mutex_lock(&pcm->open_mutex); 2128 while (1) { 2129 err = snd_pcm_open_file(file, pcm, stream, &pcm_file); 2130 if (err >= 0) 2131 break; 2132 if (err == -EAGAIN) { 2133 if (file->f_flags & O_NONBLOCK) { 2134 err = -EBUSY; 2135 break; 2136 } 2137 } else 2138 break; 2139 set_current_state(TASK_INTERRUPTIBLE); 2140 mutex_unlock(&pcm->open_mutex); 2141 schedule(); 2142 mutex_lock(&pcm->open_mutex); 2143 if (signal_pending(current)) { 2144 err = -ERESTARTSYS; 2145 break; 2146 } 2147 } 2148 remove_wait_queue(&pcm->open_wait, &wait); 2149 mutex_unlock(&pcm->open_mutex); 2150 if (err < 0) 2151 goto __error; 2152 return err; 2153 2154 __error: 2155 module_put(pcm->card->module); 2156 __error2: 2157 snd_card_file_remove(pcm->card, file); 2158 __error1: 2159 return err; 2160 } 2161 2162 static int snd_pcm_release(struct inode *inode, struct file *file) 2163 { 2164 struct snd_pcm *pcm; 2165 struct snd_pcm_substream *substream; 2166 struct snd_pcm_file *pcm_file; 2167 2168 pcm_file = file->private_data; 2169 substream = pcm_file->substream; 2170 if (snd_BUG_ON(!substream)) 2171 return -ENXIO; 2172 pcm = substream->pcm; 2173 mutex_lock(&pcm->open_mutex); 2174 snd_pcm_release_substream(substream); 2175 kfree(pcm_file); 2176 mutex_unlock(&pcm->open_mutex); 2177 wake_up(&pcm->open_wait); 2178 module_put(pcm->card->module); 2179 snd_card_file_remove(pcm->card, file); 2180 return 0; 2181 } 2182 2183 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream, 2184 snd_pcm_uframes_t frames) 2185 { 2186 struct snd_pcm_runtime *runtime = substream->runtime; 2187 snd_pcm_sframes_t appl_ptr; 2188 snd_pcm_sframes_t ret; 2189 snd_pcm_sframes_t hw_avail; 2190 2191 if (frames == 0) 2192 return 0; 2193 2194 snd_pcm_stream_lock_irq(substream); 2195 switch (runtime->status->state) { 2196 case SNDRV_PCM_STATE_PREPARED: 2197 break; 2198 case SNDRV_PCM_STATE_DRAINING: 2199 case SNDRV_PCM_STATE_RUNNING: 2200 if (snd_pcm_update_hw_ptr(substream) >= 0) 2201 break; 2202 /* Fall through */ 2203 case SNDRV_PCM_STATE_XRUN: 2204 ret = -EPIPE; 2205 goto __end; 2206 case SNDRV_PCM_STATE_SUSPENDED: 2207 ret = -ESTRPIPE; 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 case SNDRV_PCM_STATE_SUSPENDED: 2255 ret = -ESTRPIPE; 2256 goto __end; 2257 default: 2258 ret = -EBADFD; 2259 goto __end; 2260 } 2261 2262 hw_avail = snd_pcm_capture_hw_avail(runtime); 2263 if (hw_avail <= 0) { 2264 ret = 0; 2265 goto __end; 2266 } 2267 if (frames > (snd_pcm_uframes_t)hw_avail) 2268 frames = hw_avail; 2269 appl_ptr = runtime->control->appl_ptr - frames; 2270 if (appl_ptr < 0) 2271 appl_ptr += runtime->boundary; 2272 runtime->control->appl_ptr = appl_ptr; 2273 ret = frames; 2274 __end: 2275 snd_pcm_stream_unlock_irq(substream); 2276 return ret; 2277 } 2278 2279 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream, 2280 snd_pcm_uframes_t frames) 2281 { 2282 struct snd_pcm_runtime *runtime = substream->runtime; 2283 snd_pcm_sframes_t appl_ptr; 2284 snd_pcm_sframes_t ret; 2285 snd_pcm_sframes_t avail; 2286 2287 if (frames == 0) 2288 return 0; 2289 2290 snd_pcm_stream_lock_irq(substream); 2291 switch (runtime->status->state) { 2292 case SNDRV_PCM_STATE_PREPARED: 2293 case SNDRV_PCM_STATE_PAUSED: 2294 break; 2295 case SNDRV_PCM_STATE_DRAINING: 2296 case SNDRV_PCM_STATE_RUNNING: 2297 if (snd_pcm_update_hw_ptr(substream) >= 0) 2298 break; 2299 /* Fall through */ 2300 case SNDRV_PCM_STATE_XRUN: 2301 ret = -EPIPE; 2302 goto __end; 2303 case SNDRV_PCM_STATE_SUSPENDED: 2304 ret = -ESTRPIPE; 2305 goto __end; 2306 default: 2307 ret = -EBADFD; 2308 goto __end; 2309 } 2310 2311 avail = snd_pcm_playback_avail(runtime); 2312 if (avail <= 0) { 2313 ret = 0; 2314 goto __end; 2315 } 2316 if (frames > (snd_pcm_uframes_t)avail) 2317 frames = avail; 2318 appl_ptr = runtime->control->appl_ptr + frames; 2319 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) 2320 appl_ptr -= runtime->boundary; 2321 runtime->control->appl_ptr = appl_ptr; 2322 ret = frames; 2323 __end: 2324 snd_pcm_stream_unlock_irq(substream); 2325 return ret; 2326 } 2327 2328 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream, 2329 snd_pcm_uframes_t frames) 2330 { 2331 struct snd_pcm_runtime *runtime = substream->runtime; 2332 snd_pcm_sframes_t appl_ptr; 2333 snd_pcm_sframes_t ret; 2334 snd_pcm_sframes_t avail; 2335 2336 if (frames == 0) 2337 return 0; 2338 2339 snd_pcm_stream_lock_irq(substream); 2340 switch (runtime->status->state) { 2341 case SNDRV_PCM_STATE_PREPARED: 2342 case SNDRV_PCM_STATE_DRAINING: 2343 case SNDRV_PCM_STATE_PAUSED: 2344 break; 2345 case SNDRV_PCM_STATE_RUNNING: 2346 if (snd_pcm_update_hw_ptr(substream) >= 0) 2347 break; 2348 /* Fall through */ 2349 case SNDRV_PCM_STATE_XRUN: 2350 ret = -EPIPE; 2351 goto __end; 2352 case SNDRV_PCM_STATE_SUSPENDED: 2353 ret = -ESTRPIPE; 2354 goto __end; 2355 default: 2356 ret = -EBADFD; 2357 goto __end; 2358 } 2359 2360 avail = snd_pcm_capture_avail(runtime); 2361 if (avail <= 0) { 2362 ret = 0; 2363 goto __end; 2364 } 2365 if (frames > (snd_pcm_uframes_t)avail) 2366 frames = avail; 2367 appl_ptr = runtime->control->appl_ptr + frames; 2368 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) 2369 appl_ptr -= runtime->boundary; 2370 runtime->control->appl_ptr = appl_ptr; 2371 ret = frames; 2372 __end: 2373 snd_pcm_stream_unlock_irq(substream); 2374 return ret; 2375 } 2376 2377 static int snd_pcm_hwsync(struct snd_pcm_substream *substream) 2378 { 2379 struct snd_pcm_runtime *runtime = substream->runtime; 2380 int err; 2381 2382 snd_pcm_stream_lock_irq(substream); 2383 switch (runtime->status->state) { 2384 case SNDRV_PCM_STATE_DRAINING: 2385 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 2386 goto __badfd; 2387 case SNDRV_PCM_STATE_RUNNING: 2388 if ((err = snd_pcm_update_hw_ptr(substream)) < 0) 2389 break; 2390 /* Fall through */ 2391 case SNDRV_PCM_STATE_PREPARED: 2392 case SNDRV_PCM_STATE_SUSPENDED: 2393 err = 0; 2394 break; 2395 case SNDRV_PCM_STATE_XRUN: 2396 err = -EPIPE; 2397 break; 2398 default: 2399 __badfd: 2400 err = -EBADFD; 2401 break; 2402 } 2403 snd_pcm_stream_unlock_irq(substream); 2404 return err; 2405 } 2406 2407 static int snd_pcm_delay(struct snd_pcm_substream *substream, 2408 snd_pcm_sframes_t __user *res) 2409 { 2410 struct snd_pcm_runtime *runtime = substream->runtime; 2411 int err; 2412 snd_pcm_sframes_t n = 0; 2413 2414 snd_pcm_stream_lock_irq(substream); 2415 switch (runtime->status->state) { 2416 case SNDRV_PCM_STATE_DRAINING: 2417 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 2418 goto __badfd; 2419 case SNDRV_PCM_STATE_RUNNING: 2420 if ((err = snd_pcm_update_hw_ptr(substream)) < 0) 2421 break; 2422 /* Fall through */ 2423 case SNDRV_PCM_STATE_PREPARED: 2424 case SNDRV_PCM_STATE_SUSPENDED: 2425 err = 0; 2426 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2427 n = snd_pcm_playback_hw_avail(runtime); 2428 else 2429 n = snd_pcm_capture_avail(runtime); 2430 n += runtime->delay; 2431 break; 2432 case SNDRV_PCM_STATE_XRUN: 2433 err = -EPIPE; 2434 break; 2435 default: 2436 __badfd: 2437 err = -EBADFD; 2438 break; 2439 } 2440 snd_pcm_stream_unlock_irq(substream); 2441 if (!err) 2442 if (put_user(n, res)) 2443 err = -EFAULT; 2444 return err; 2445 } 2446 2447 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream, 2448 struct snd_pcm_sync_ptr __user *_sync_ptr) 2449 { 2450 struct snd_pcm_runtime *runtime = substream->runtime; 2451 struct snd_pcm_sync_ptr sync_ptr; 2452 volatile struct snd_pcm_mmap_status *status; 2453 volatile struct snd_pcm_mmap_control *control; 2454 int err; 2455 2456 memset(&sync_ptr, 0, sizeof(sync_ptr)); 2457 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags))) 2458 return -EFAULT; 2459 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control))) 2460 return -EFAULT; 2461 status = runtime->status; 2462 control = runtime->control; 2463 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) { 2464 err = snd_pcm_hwsync(substream); 2465 if (err < 0) 2466 return err; 2467 } 2468 snd_pcm_stream_lock_irq(substream); 2469 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) 2470 control->appl_ptr = sync_ptr.c.control.appl_ptr; 2471 else 2472 sync_ptr.c.control.appl_ptr = control->appl_ptr; 2473 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) 2474 control->avail_min = sync_ptr.c.control.avail_min; 2475 else 2476 sync_ptr.c.control.avail_min = control->avail_min; 2477 sync_ptr.s.status.state = status->state; 2478 sync_ptr.s.status.hw_ptr = status->hw_ptr; 2479 sync_ptr.s.status.tstamp = status->tstamp; 2480 sync_ptr.s.status.suspended_state = status->suspended_state; 2481 snd_pcm_stream_unlock_irq(substream); 2482 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr))) 2483 return -EFAULT; 2484 return 0; 2485 } 2486 2487 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg) 2488 { 2489 struct snd_pcm_runtime *runtime = substream->runtime; 2490 int arg; 2491 2492 if (get_user(arg, _arg)) 2493 return -EFAULT; 2494 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST) 2495 return -EINVAL; 2496 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY; 2497 if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC) 2498 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC; 2499 return 0; 2500 } 2501 2502 static int snd_pcm_common_ioctl1(struct file *file, 2503 struct snd_pcm_substream *substream, 2504 unsigned int cmd, void __user *arg) 2505 { 2506 switch (cmd) { 2507 case SNDRV_PCM_IOCTL_PVERSION: 2508 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0; 2509 case SNDRV_PCM_IOCTL_INFO: 2510 return snd_pcm_info_user(substream, arg); 2511 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */ 2512 return 0; 2513 case SNDRV_PCM_IOCTL_TTSTAMP: 2514 return snd_pcm_tstamp(substream, arg); 2515 case SNDRV_PCM_IOCTL_HW_REFINE: 2516 return snd_pcm_hw_refine_user(substream, arg); 2517 case SNDRV_PCM_IOCTL_HW_PARAMS: 2518 return snd_pcm_hw_params_user(substream, arg); 2519 case SNDRV_PCM_IOCTL_HW_FREE: 2520 return snd_pcm_hw_free(substream); 2521 case SNDRV_PCM_IOCTL_SW_PARAMS: 2522 return snd_pcm_sw_params_user(substream, arg); 2523 case SNDRV_PCM_IOCTL_STATUS: 2524 return snd_pcm_status_user(substream, arg); 2525 case SNDRV_PCM_IOCTL_CHANNEL_INFO: 2526 return snd_pcm_channel_info_user(substream, arg); 2527 case SNDRV_PCM_IOCTL_PREPARE: 2528 return snd_pcm_prepare(substream, file); 2529 case SNDRV_PCM_IOCTL_RESET: 2530 return snd_pcm_reset(substream); 2531 case SNDRV_PCM_IOCTL_START: 2532 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING); 2533 case SNDRV_PCM_IOCTL_LINK: 2534 return snd_pcm_link(substream, (int)(unsigned long) arg); 2535 case SNDRV_PCM_IOCTL_UNLINK: 2536 return snd_pcm_unlink(substream); 2537 case SNDRV_PCM_IOCTL_RESUME: 2538 return snd_pcm_resume(substream); 2539 case SNDRV_PCM_IOCTL_XRUN: 2540 return snd_pcm_xrun(substream); 2541 case SNDRV_PCM_IOCTL_HWSYNC: 2542 return snd_pcm_hwsync(substream); 2543 case SNDRV_PCM_IOCTL_DELAY: 2544 return snd_pcm_delay(substream, arg); 2545 case SNDRV_PCM_IOCTL_SYNC_PTR: 2546 return snd_pcm_sync_ptr(substream, arg); 2547 #ifdef CONFIG_SND_SUPPORT_OLD_API 2548 case SNDRV_PCM_IOCTL_HW_REFINE_OLD: 2549 return snd_pcm_hw_refine_old_user(substream, arg); 2550 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD: 2551 return snd_pcm_hw_params_old_user(substream, arg); 2552 #endif 2553 case SNDRV_PCM_IOCTL_DRAIN: 2554 return snd_pcm_drain(substream, file); 2555 case SNDRV_PCM_IOCTL_DROP: 2556 return snd_pcm_drop(substream); 2557 case SNDRV_PCM_IOCTL_PAUSE: 2558 { 2559 int res; 2560 snd_pcm_stream_lock_irq(substream); 2561 res = snd_pcm_pause(substream, (int)(unsigned long)arg); 2562 snd_pcm_stream_unlock_irq(substream); 2563 return res; 2564 } 2565 } 2566 snd_printd("unknown ioctl = 0x%x\n", cmd); 2567 return -ENOTTY; 2568 } 2569 2570 static int snd_pcm_playback_ioctl1(struct file *file, 2571 struct snd_pcm_substream *substream, 2572 unsigned int cmd, void __user *arg) 2573 { 2574 if (snd_BUG_ON(!substream)) 2575 return -ENXIO; 2576 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) 2577 return -EINVAL; 2578 switch (cmd) { 2579 case SNDRV_PCM_IOCTL_WRITEI_FRAMES: 2580 { 2581 struct snd_xferi xferi; 2582 struct snd_xferi __user *_xferi = arg; 2583 struct snd_pcm_runtime *runtime = substream->runtime; 2584 snd_pcm_sframes_t result; 2585 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2586 return -EBADFD; 2587 if (put_user(0, &_xferi->result)) 2588 return -EFAULT; 2589 if (copy_from_user(&xferi, _xferi, sizeof(xferi))) 2590 return -EFAULT; 2591 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames); 2592 __put_user(result, &_xferi->result); 2593 return result < 0 ? result : 0; 2594 } 2595 case SNDRV_PCM_IOCTL_WRITEN_FRAMES: 2596 { 2597 struct snd_xfern xfern; 2598 struct snd_xfern __user *_xfern = arg; 2599 struct snd_pcm_runtime *runtime = substream->runtime; 2600 void __user **bufs; 2601 snd_pcm_sframes_t result; 2602 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2603 return -EBADFD; 2604 if (runtime->channels > 128) 2605 return -EINVAL; 2606 if (put_user(0, &_xfern->result)) 2607 return -EFAULT; 2608 if (copy_from_user(&xfern, _xfern, sizeof(xfern))) 2609 return -EFAULT; 2610 2611 bufs = memdup_user(xfern.bufs, 2612 sizeof(void *) * runtime->channels); 2613 if (IS_ERR(bufs)) 2614 return PTR_ERR(bufs); 2615 result = snd_pcm_lib_writev(substream, bufs, xfern.frames); 2616 kfree(bufs); 2617 __put_user(result, &_xfern->result); 2618 return result < 0 ? result : 0; 2619 } 2620 case SNDRV_PCM_IOCTL_REWIND: 2621 { 2622 snd_pcm_uframes_t frames; 2623 snd_pcm_uframes_t __user *_frames = arg; 2624 snd_pcm_sframes_t result; 2625 if (get_user(frames, _frames)) 2626 return -EFAULT; 2627 if (put_user(0, _frames)) 2628 return -EFAULT; 2629 result = snd_pcm_playback_rewind(substream, frames); 2630 __put_user(result, _frames); 2631 return result < 0 ? result : 0; 2632 } 2633 case SNDRV_PCM_IOCTL_FORWARD: 2634 { 2635 snd_pcm_uframes_t frames; 2636 snd_pcm_uframes_t __user *_frames = arg; 2637 snd_pcm_sframes_t result; 2638 if (get_user(frames, _frames)) 2639 return -EFAULT; 2640 if (put_user(0, _frames)) 2641 return -EFAULT; 2642 result = snd_pcm_playback_forward(substream, frames); 2643 __put_user(result, _frames); 2644 return result < 0 ? result : 0; 2645 } 2646 } 2647 return snd_pcm_common_ioctl1(file, substream, cmd, arg); 2648 } 2649 2650 static int snd_pcm_capture_ioctl1(struct file *file, 2651 struct snd_pcm_substream *substream, 2652 unsigned int cmd, void __user *arg) 2653 { 2654 if (snd_BUG_ON(!substream)) 2655 return -ENXIO; 2656 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE)) 2657 return -EINVAL; 2658 switch (cmd) { 2659 case SNDRV_PCM_IOCTL_READI_FRAMES: 2660 { 2661 struct snd_xferi xferi; 2662 struct snd_xferi __user *_xferi = arg; 2663 struct snd_pcm_runtime *runtime = substream->runtime; 2664 snd_pcm_sframes_t result; 2665 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2666 return -EBADFD; 2667 if (put_user(0, &_xferi->result)) 2668 return -EFAULT; 2669 if (copy_from_user(&xferi, _xferi, sizeof(xferi))) 2670 return -EFAULT; 2671 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames); 2672 __put_user(result, &_xferi->result); 2673 return result < 0 ? result : 0; 2674 } 2675 case SNDRV_PCM_IOCTL_READN_FRAMES: 2676 { 2677 struct snd_xfern xfern; 2678 struct snd_xfern __user *_xfern = arg; 2679 struct snd_pcm_runtime *runtime = substream->runtime; 2680 void *bufs; 2681 snd_pcm_sframes_t result; 2682 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2683 return -EBADFD; 2684 if (runtime->channels > 128) 2685 return -EINVAL; 2686 if (put_user(0, &_xfern->result)) 2687 return -EFAULT; 2688 if (copy_from_user(&xfern, _xfern, sizeof(xfern))) 2689 return -EFAULT; 2690 2691 bufs = memdup_user(xfern.bufs, 2692 sizeof(void *) * runtime->channels); 2693 if (IS_ERR(bufs)) 2694 return PTR_ERR(bufs); 2695 result = snd_pcm_lib_readv(substream, bufs, xfern.frames); 2696 kfree(bufs); 2697 __put_user(result, &_xfern->result); 2698 return result < 0 ? result : 0; 2699 } 2700 case SNDRV_PCM_IOCTL_REWIND: 2701 { 2702 snd_pcm_uframes_t frames; 2703 snd_pcm_uframes_t __user *_frames = arg; 2704 snd_pcm_sframes_t result; 2705 if (get_user(frames, _frames)) 2706 return -EFAULT; 2707 if (put_user(0, _frames)) 2708 return -EFAULT; 2709 result = snd_pcm_capture_rewind(substream, frames); 2710 __put_user(result, _frames); 2711 return result < 0 ? result : 0; 2712 } 2713 case SNDRV_PCM_IOCTL_FORWARD: 2714 { 2715 snd_pcm_uframes_t frames; 2716 snd_pcm_uframes_t __user *_frames = arg; 2717 snd_pcm_sframes_t result; 2718 if (get_user(frames, _frames)) 2719 return -EFAULT; 2720 if (put_user(0, _frames)) 2721 return -EFAULT; 2722 result = snd_pcm_capture_forward(substream, frames); 2723 __put_user(result, _frames); 2724 return result < 0 ? result : 0; 2725 } 2726 } 2727 return snd_pcm_common_ioctl1(file, substream, cmd, arg); 2728 } 2729 2730 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd, 2731 unsigned long arg) 2732 { 2733 struct snd_pcm_file *pcm_file; 2734 2735 pcm_file = file->private_data; 2736 2737 if (((cmd >> 8) & 0xff) != 'A') 2738 return -ENOTTY; 2739 2740 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd, 2741 (void __user *)arg); 2742 } 2743 2744 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd, 2745 unsigned long arg) 2746 { 2747 struct snd_pcm_file *pcm_file; 2748 2749 pcm_file = file->private_data; 2750 2751 if (((cmd >> 8) & 0xff) != 'A') 2752 return -ENOTTY; 2753 2754 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd, 2755 (void __user *)arg); 2756 } 2757 2758 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, 2759 unsigned int cmd, void *arg) 2760 { 2761 mm_segment_t fs; 2762 int result; 2763 2764 fs = snd_enter_user(); 2765 switch (substream->stream) { 2766 case SNDRV_PCM_STREAM_PLAYBACK: 2767 result = snd_pcm_playback_ioctl1(NULL, substream, cmd, 2768 (void __user *)arg); 2769 break; 2770 case SNDRV_PCM_STREAM_CAPTURE: 2771 result = snd_pcm_capture_ioctl1(NULL, substream, cmd, 2772 (void __user *)arg); 2773 break; 2774 default: 2775 result = -EINVAL; 2776 break; 2777 } 2778 snd_leave_user(fs); 2779 return result; 2780 } 2781 2782 EXPORT_SYMBOL(snd_pcm_kernel_ioctl); 2783 2784 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count, 2785 loff_t * offset) 2786 { 2787 struct snd_pcm_file *pcm_file; 2788 struct snd_pcm_substream *substream; 2789 struct snd_pcm_runtime *runtime; 2790 snd_pcm_sframes_t result; 2791 2792 pcm_file = file->private_data; 2793 substream = pcm_file->substream; 2794 if (PCM_RUNTIME_CHECK(substream)) 2795 return -ENXIO; 2796 runtime = substream->runtime; 2797 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2798 return -EBADFD; 2799 if (!frame_aligned(runtime, count)) 2800 return -EINVAL; 2801 count = bytes_to_frames(runtime, count); 2802 result = snd_pcm_lib_read(substream, buf, count); 2803 if (result > 0) 2804 result = frames_to_bytes(runtime, result); 2805 return result; 2806 } 2807 2808 static ssize_t snd_pcm_write(struct file *file, const char __user *buf, 2809 size_t count, loff_t * offset) 2810 { 2811 struct snd_pcm_file *pcm_file; 2812 struct snd_pcm_substream *substream; 2813 struct snd_pcm_runtime *runtime; 2814 snd_pcm_sframes_t result; 2815 2816 pcm_file = file->private_data; 2817 substream = pcm_file->substream; 2818 if (PCM_RUNTIME_CHECK(substream)) 2819 return -ENXIO; 2820 runtime = substream->runtime; 2821 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2822 return -EBADFD; 2823 if (!frame_aligned(runtime, count)) 2824 return -EINVAL; 2825 count = bytes_to_frames(runtime, count); 2826 result = snd_pcm_lib_write(substream, buf, count); 2827 if (result > 0) 2828 result = frames_to_bytes(runtime, result); 2829 return result; 2830 } 2831 2832 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov, 2833 unsigned long nr_segs, loff_t pos) 2834 2835 { 2836 struct snd_pcm_file *pcm_file; 2837 struct snd_pcm_substream *substream; 2838 struct snd_pcm_runtime *runtime; 2839 snd_pcm_sframes_t result; 2840 unsigned long i; 2841 void __user **bufs; 2842 snd_pcm_uframes_t frames; 2843 2844 pcm_file = iocb->ki_filp->private_data; 2845 substream = pcm_file->substream; 2846 if (PCM_RUNTIME_CHECK(substream)) 2847 return -ENXIO; 2848 runtime = substream->runtime; 2849 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2850 return -EBADFD; 2851 if (nr_segs > 1024 || nr_segs != runtime->channels) 2852 return -EINVAL; 2853 if (!frame_aligned(runtime, iov->iov_len)) 2854 return -EINVAL; 2855 frames = bytes_to_samples(runtime, iov->iov_len); 2856 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL); 2857 if (bufs == NULL) 2858 return -ENOMEM; 2859 for (i = 0; i < nr_segs; ++i) 2860 bufs[i] = iov[i].iov_base; 2861 result = snd_pcm_lib_readv(substream, bufs, frames); 2862 if (result > 0) 2863 result = frames_to_bytes(runtime, result); 2864 kfree(bufs); 2865 return result; 2866 } 2867 2868 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov, 2869 unsigned long nr_segs, loff_t pos) 2870 { 2871 struct snd_pcm_file *pcm_file; 2872 struct snd_pcm_substream *substream; 2873 struct snd_pcm_runtime *runtime; 2874 snd_pcm_sframes_t result; 2875 unsigned long i; 2876 void __user **bufs; 2877 snd_pcm_uframes_t frames; 2878 2879 pcm_file = iocb->ki_filp->private_data; 2880 substream = pcm_file->substream; 2881 if (PCM_RUNTIME_CHECK(substream)) 2882 return -ENXIO; 2883 runtime = substream->runtime; 2884 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2885 return -EBADFD; 2886 if (nr_segs > 128 || nr_segs != runtime->channels || 2887 !frame_aligned(runtime, iov->iov_len)) 2888 return -EINVAL; 2889 frames = bytes_to_samples(runtime, iov->iov_len); 2890 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL); 2891 if (bufs == NULL) 2892 return -ENOMEM; 2893 for (i = 0; i < nr_segs; ++i) 2894 bufs[i] = iov[i].iov_base; 2895 result = snd_pcm_lib_writev(substream, bufs, frames); 2896 if (result > 0) 2897 result = frames_to_bytes(runtime, result); 2898 kfree(bufs); 2899 return result; 2900 } 2901 2902 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait) 2903 { 2904 struct snd_pcm_file *pcm_file; 2905 struct snd_pcm_substream *substream; 2906 struct snd_pcm_runtime *runtime; 2907 unsigned int mask; 2908 snd_pcm_uframes_t avail; 2909 2910 pcm_file = file->private_data; 2911 2912 substream = pcm_file->substream; 2913 if (PCM_RUNTIME_CHECK(substream)) 2914 return -ENXIO; 2915 runtime = substream->runtime; 2916 2917 poll_wait(file, &runtime->sleep, wait); 2918 2919 snd_pcm_stream_lock_irq(substream); 2920 avail = snd_pcm_playback_avail(runtime); 2921 switch (runtime->status->state) { 2922 case SNDRV_PCM_STATE_RUNNING: 2923 case SNDRV_PCM_STATE_PREPARED: 2924 case SNDRV_PCM_STATE_PAUSED: 2925 if (avail >= runtime->control->avail_min) { 2926 mask = POLLOUT | POLLWRNORM; 2927 break; 2928 } 2929 /* Fall through */ 2930 case SNDRV_PCM_STATE_DRAINING: 2931 mask = 0; 2932 break; 2933 default: 2934 mask = POLLOUT | POLLWRNORM | POLLERR; 2935 break; 2936 } 2937 snd_pcm_stream_unlock_irq(substream); 2938 return mask; 2939 } 2940 2941 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait) 2942 { 2943 struct snd_pcm_file *pcm_file; 2944 struct snd_pcm_substream *substream; 2945 struct snd_pcm_runtime *runtime; 2946 unsigned int mask; 2947 snd_pcm_uframes_t avail; 2948 2949 pcm_file = file->private_data; 2950 2951 substream = pcm_file->substream; 2952 if (PCM_RUNTIME_CHECK(substream)) 2953 return -ENXIO; 2954 runtime = substream->runtime; 2955 2956 poll_wait(file, &runtime->sleep, wait); 2957 2958 snd_pcm_stream_lock_irq(substream); 2959 avail = snd_pcm_capture_avail(runtime); 2960 switch (runtime->status->state) { 2961 case SNDRV_PCM_STATE_RUNNING: 2962 case SNDRV_PCM_STATE_PREPARED: 2963 case SNDRV_PCM_STATE_PAUSED: 2964 if (avail >= runtime->control->avail_min) { 2965 mask = POLLIN | POLLRDNORM; 2966 break; 2967 } 2968 mask = 0; 2969 break; 2970 case SNDRV_PCM_STATE_DRAINING: 2971 if (avail > 0) { 2972 mask = POLLIN | POLLRDNORM; 2973 break; 2974 } 2975 /* Fall through */ 2976 default: 2977 mask = POLLIN | POLLRDNORM | POLLERR; 2978 break; 2979 } 2980 snd_pcm_stream_unlock_irq(substream); 2981 return mask; 2982 } 2983 2984 /* 2985 * mmap support 2986 */ 2987 2988 /* 2989 * Only on coherent architectures, we can mmap the status and the control records 2990 * for effcient data transfer. On others, we have to use HWSYNC ioctl... 2991 */ 2992 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) 2993 /* 2994 * mmap status record 2995 */ 2996 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area, 2997 struct vm_fault *vmf) 2998 { 2999 struct snd_pcm_substream *substream = area->vm_private_data; 3000 struct snd_pcm_runtime *runtime; 3001 3002 if (substream == NULL) 3003 return VM_FAULT_SIGBUS; 3004 runtime = substream->runtime; 3005 vmf->page = virt_to_page(runtime->status); 3006 get_page(vmf->page); 3007 return 0; 3008 } 3009 3010 static const struct vm_operations_struct snd_pcm_vm_ops_status = 3011 { 3012 .fault = snd_pcm_mmap_status_fault, 3013 }; 3014 3015 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, 3016 struct vm_area_struct *area) 3017 { 3018 struct snd_pcm_runtime *runtime; 3019 long size; 3020 if (!(area->vm_flags & VM_READ)) 3021 return -EINVAL; 3022 runtime = substream->runtime; 3023 size = area->vm_end - area->vm_start; 3024 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))) 3025 return -EINVAL; 3026 area->vm_ops = &snd_pcm_vm_ops_status; 3027 area->vm_private_data = substream; 3028 area->vm_flags |= VM_RESERVED; 3029 return 0; 3030 } 3031 3032 /* 3033 * mmap control record 3034 */ 3035 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area, 3036 struct vm_fault *vmf) 3037 { 3038 struct snd_pcm_substream *substream = area->vm_private_data; 3039 struct snd_pcm_runtime *runtime; 3040 3041 if (substream == NULL) 3042 return VM_FAULT_SIGBUS; 3043 runtime = substream->runtime; 3044 vmf->page = virt_to_page(runtime->control); 3045 get_page(vmf->page); 3046 return 0; 3047 } 3048 3049 static const struct vm_operations_struct snd_pcm_vm_ops_control = 3050 { 3051 .fault = snd_pcm_mmap_control_fault, 3052 }; 3053 3054 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, 3055 struct vm_area_struct *area) 3056 { 3057 struct snd_pcm_runtime *runtime; 3058 long size; 3059 if (!(area->vm_flags & VM_READ)) 3060 return -EINVAL; 3061 runtime = substream->runtime; 3062 size = area->vm_end - area->vm_start; 3063 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))) 3064 return -EINVAL; 3065 area->vm_ops = &snd_pcm_vm_ops_control; 3066 area->vm_private_data = substream; 3067 area->vm_flags |= VM_RESERVED; 3068 return 0; 3069 } 3070 #else /* ! coherent mmap */ 3071 /* 3072 * don't support mmap for status and control records. 3073 */ 3074 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, 3075 struct vm_area_struct *area) 3076 { 3077 return -ENXIO; 3078 } 3079 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, 3080 struct vm_area_struct *area) 3081 { 3082 return -ENXIO; 3083 } 3084 #endif /* coherent mmap */ 3085 3086 static inline struct page * 3087 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs) 3088 { 3089 void *vaddr = substream->runtime->dma_area + ofs; 3090 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT) 3091 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) 3092 return virt_to_page(CAC_ADDR(vaddr)); 3093 #endif 3094 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE) 3095 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) { 3096 dma_addr_t addr = substream->runtime->dma_addr + ofs; 3097 addr -= get_dma_offset(substream->dma_buffer.dev.dev); 3098 /* assume dma_handle set via pfn_to_phys() in 3099 * mm/dma-noncoherent.c 3100 */ 3101 return pfn_to_page(addr >> PAGE_SHIFT); 3102 } 3103 #endif 3104 return virt_to_page(vaddr); 3105 } 3106 3107 /* 3108 * fault callback for mmapping a RAM page 3109 */ 3110 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area, 3111 struct vm_fault *vmf) 3112 { 3113 struct snd_pcm_substream *substream = area->vm_private_data; 3114 struct snd_pcm_runtime *runtime; 3115 unsigned long offset; 3116 struct page * page; 3117 size_t dma_bytes; 3118 3119 if (substream == NULL) 3120 return VM_FAULT_SIGBUS; 3121 runtime = substream->runtime; 3122 offset = vmf->pgoff << PAGE_SHIFT; 3123 dma_bytes = PAGE_ALIGN(runtime->dma_bytes); 3124 if (offset > dma_bytes - PAGE_SIZE) 3125 return VM_FAULT_SIGBUS; 3126 if (substream->ops->page) 3127 page = substream->ops->page(substream, offset); 3128 else 3129 page = snd_pcm_default_page_ops(substream, offset); 3130 if (!page) 3131 return VM_FAULT_SIGBUS; 3132 get_page(page); 3133 vmf->page = page; 3134 return 0; 3135 } 3136 3137 static const struct vm_operations_struct snd_pcm_vm_ops_data = { 3138 .open = snd_pcm_mmap_data_open, 3139 .close = snd_pcm_mmap_data_close, 3140 }; 3141 3142 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = { 3143 .open = snd_pcm_mmap_data_open, 3144 .close = snd_pcm_mmap_data_close, 3145 .fault = snd_pcm_mmap_data_fault, 3146 }; 3147 3148 #ifndef ARCH_HAS_DMA_MMAP_COHERENT 3149 /* This should be defined / handled globally! */ 3150 #ifdef CONFIG_ARM 3151 #define ARCH_HAS_DMA_MMAP_COHERENT 3152 #endif 3153 #endif 3154 3155 /* 3156 * mmap the DMA buffer on RAM 3157 */ 3158 static int snd_pcm_default_mmap(struct snd_pcm_substream *substream, 3159 struct vm_area_struct *area) 3160 { 3161 area->vm_flags |= VM_RESERVED; 3162 #ifdef ARCH_HAS_DMA_MMAP_COHERENT 3163 if (!substream->ops->page && 3164 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) 3165 return dma_mmap_coherent(substream->dma_buffer.dev.dev, 3166 area, 3167 substream->runtime->dma_area, 3168 substream->runtime->dma_addr, 3169 area->vm_end - area->vm_start); 3170 #elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT) 3171 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV && 3172 !plat_device_is_coherent(substream->dma_buffer.dev.dev)) 3173 area->vm_page_prot = pgprot_noncached(area->vm_page_prot); 3174 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */ 3175 /* mmap with fault handler */ 3176 area->vm_ops = &snd_pcm_vm_ops_data_fault; 3177 return 0; 3178 } 3179 3180 /* 3181 * mmap the DMA buffer on I/O memory area 3182 */ 3183 #if SNDRV_PCM_INFO_MMAP_IOMEM 3184 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, 3185 struct vm_area_struct *area) 3186 { 3187 long size; 3188 unsigned long offset; 3189 3190 area->vm_page_prot = pgprot_noncached(area->vm_page_prot); 3191 area->vm_flags |= VM_IO; 3192 size = area->vm_end - area->vm_start; 3193 offset = area->vm_pgoff << PAGE_SHIFT; 3194 if (io_remap_pfn_range(area, area->vm_start, 3195 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT, 3196 size, area->vm_page_prot)) 3197 return -EAGAIN; 3198 return 0; 3199 } 3200 3201 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem); 3202 #endif /* SNDRV_PCM_INFO_MMAP */ 3203 3204 /* mmap callback with pgprot_noncached */ 3205 int snd_pcm_lib_mmap_noncached(struct snd_pcm_substream *substream, 3206 struct vm_area_struct *area) 3207 { 3208 area->vm_page_prot = pgprot_noncached(area->vm_page_prot); 3209 return snd_pcm_default_mmap(substream, area); 3210 } 3211 EXPORT_SYMBOL(snd_pcm_lib_mmap_noncached); 3212 3213 /* 3214 * mmap DMA buffer 3215 */ 3216 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, 3217 struct vm_area_struct *area) 3218 { 3219 struct snd_pcm_runtime *runtime; 3220 long size; 3221 unsigned long offset; 3222 size_t dma_bytes; 3223 int err; 3224 3225 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 3226 if (!(area->vm_flags & (VM_WRITE|VM_READ))) 3227 return -EINVAL; 3228 } else { 3229 if (!(area->vm_flags & VM_READ)) 3230 return -EINVAL; 3231 } 3232 runtime = substream->runtime; 3233 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 3234 return -EBADFD; 3235 if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) 3236 return -ENXIO; 3237 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || 3238 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) 3239 return -EINVAL; 3240 size = area->vm_end - area->vm_start; 3241 offset = area->vm_pgoff << PAGE_SHIFT; 3242 dma_bytes = PAGE_ALIGN(runtime->dma_bytes); 3243 if ((size_t)size > dma_bytes) 3244 return -EINVAL; 3245 if (offset > dma_bytes - size) 3246 return -EINVAL; 3247 3248 area->vm_ops = &snd_pcm_vm_ops_data; 3249 area->vm_private_data = substream; 3250 if (substream->ops->mmap) 3251 err = substream->ops->mmap(substream, area); 3252 else 3253 err = snd_pcm_default_mmap(substream, area); 3254 if (!err) 3255 atomic_inc(&substream->mmap_count); 3256 return err; 3257 } 3258 3259 EXPORT_SYMBOL(snd_pcm_mmap_data); 3260 3261 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area) 3262 { 3263 struct snd_pcm_file * pcm_file; 3264 struct snd_pcm_substream *substream; 3265 unsigned long offset; 3266 3267 pcm_file = file->private_data; 3268 substream = pcm_file->substream; 3269 if (PCM_RUNTIME_CHECK(substream)) 3270 return -ENXIO; 3271 3272 offset = area->vm_pgoff << PAGE_SHIFT; 3273 switch (offset) { 3274 case SNDRV_PCM_MMAP_OFFSET_STATUS: 3275 if (pcm_file->no_compat_mmap) 3276 return -ENXIO; 3277 return snd_pcm_mmap_status(substream, file, area); 3278 case SNDRV_PCM_MMAP_OFFSET_CONTROL: 3279 if (pcm_file->no_compat_mmap) 3280 return -ENXIO; 3281 return snd_pcm_mmap_control(substream, file, area); 3282 default: 3283 return snd_pcm_mmap_data(substream, file, area); 3284 } 3285 return 0; 3286 } 3287 3288 static int snd_pcm_fasync(int fd, struct file * file, int on) 3289 { 3290 struct snd_pcm_file * pcm_file; 3291 struct snd_pcm_substream *substream; 3292 struct snd_pcm_runtime *runtime; 3293 3294 pcm_file = file->private_data; 3295 substream = pcm_file->substream; 3296 if (PCM_RUNTIME_CHECK(substream)) 3297 return -ENXIO; 3298 runtime = substream->runtime; 3299 return fasync_helper(fd, file, on, &runtime->fasync); 3300 } 3301 3302 /* 3303 * ioctl32 compat 3304 */ 3305 #ifdef CONFIG_COMPAT 3306 #include "pcm_compat.c" 3307 #else 3308 #define snd_pcm_ioctl_compat NULL 3309 #endif 3310 3311 /* 3312 * To be removed helpers to keep binary compatibility 3313 */ 3314 3315 #ifdef CONFIG_SND_SUPPORT_OLD_API 3316 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5)) 3317 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5)) 3318 3319 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params, 3320 struct snd_pcm_hw_params_old *oparams) 3321 { 3322 unsigned int i; 3323 3324 memset(params, 0, sizeof(*params)); 3325 params->flags = oparams->flags; 3326 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) 3327 params->masks[i].bits[0] = oparams->masks[i]; 3328 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals)); 3329 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask); 3330 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask); 3331 params->info = oparams->info; 3332 params->msbits = oparams->msbits; 3333 params->rate_num = oparams->rate_num; 3334 params->rate_den = oparams->rate_den; 3335 params->fifo_size = oparams->fifo_size; 3336 } 3337 3338 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams, 3339 struct snd_pcm_hw_params *params) 3340 { 3341 unsigned int i; 3342 3343 memset(oparams, 0, sizeof(*oparams)); 3344 oparams->flags = params->flags; 3345 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) 3346 oparams->masks[i] = params->masks[i].bits[0]; 3347 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals)); 3348 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask); 3349 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask); 3350 oparams->info = params->info; 3351 oparams->msbits = params->msbits; 3352 oparams->rate_num = params->rate_num; 3353 oparams->rate_den = params->rate_den; 3354 oparams->fifo_size = params->fifo_size; 3355 } 3356 3357 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, 3358 struct snd_pcm_hw_params_old __user * _oparams) 3359 { 3360 struct snd_pcm_hw_params *params; 3361 struct snd_pcm_hw_params_old *oparams = NULL; 3362 int err; 3363 3364 params = kmalloc(sizeof(*params), GFP_KERNEL); 3365 if (!params) 3366 return -ENOMEM; 3367 3368 oparams = memdup_user(_oparams, sizeof(*oparams)); 3369 if (IS_ERR(oparams)) { 3370 err = PTR_ERR(oparams); 3371 goto out; 3372 } 3373 snd_pcm_hw_convert_from_old_params(params, oparams); 3374 err = snd_pcm_hw_refine(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 3381 kfree(oparams); 3382 out: 3383 kfree(params); 3384 return err; 3385 } 3386 3387 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, 3388 struct snd_pcm_hw_params_old __user * _oparams) 3389 { 3390 struct snd_pcm_hw_params *params; 3391 struct snd_pcm_hw_params_old *oparams = NULL; 3392 int err; 3393 3394 params = kmalloc(sizeof(*params), GFP_KERNEL); 3395 if (!params) 3396 return -ENOMEM; 3397 3398 oparams = memdup_user(_oparams, sizeof(*oparams)); 3399 if (IS_ERR(oparams)) { 3400 err = PTR_ERR(oparams); 3401 goto out; 3402 } 3403 snd_pcm_hw_convert_from_old_params(params, oparams); 3404 err = snd_pcm_hw_params(substream, params); 3405 snd_pcm_hw_convert_to_old_params(oparams, params); 3406 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { 3407 if (!err) 3408 err = -EFAULT; 3409 } 3410 3411 kfree(oparams); 3412 out: 3413 kfree(params); 3414 return err; 3415 } 3416 #endif /* CONFIG_SND_SUPPORT_OLD_API */ 3417 3418 #ifndef CONFIG_MMU 3419 static unsigned long snd_pcm_get_unmapped_area(struct file *file, 3420 unsigned long addr, 3421 unsigned long len, 3422 unsigned long pgoff, 3423 unsigned long flags) 3424 { 3425 struct snd_pcm_file *pcm_file = file->private_data; 3426 struct snd_pcm_substream *substream = pcm_file->substream; 3427 struct snd_pcm_runtime *runtime = substream->runtime; 3428 unsigned long offset = pgoff << PAGE_SHIFT; 3429 3430 switch (offset) { 3431 case SNDRV_PCM_MMAP_OFFSET_STATUS: 3432 return (unsigned long)runtime->status; 3433 case SNDRV_PCM_MMAP_OFFSET_CONTROL: 3434 return (unsigned long)runtime->control; 3435 default: 3436 return (unsigned long)runtime->dma_area + offset; 3437 } 3438 } 3439 #else 3440 # define snd_pcm_get_unmapped_area NULL 3441 #endif 3442 3443 /* 3444 * Register section 3445 */ 3446 3447 const struct file_operations snd_pcm_f_ops[2] = { 3448 { 3449 .owner = THIS_MODULE, 3450 .write = snd_pcm_write, 3451 .aio_write = snd_pcm_aio_write, 3452 .open = snd_pcm_playback_open, 3453 .release = snd_pcm_release, 3454 .llseek = no_llseek, 3455 .poll = snd_pcm_playback_poll, 3456 .unlocked_ioctl = snd_pcm_playback_ioctl, 3457 .compat_ioctl = snd_pcm_ioctl_compat, 3458 .mmap = snd_pcm_mmap, 3459 .fasync = snd_pcm_fasync, 3460 .get_unmapped_area = snd_pcm_get_unmapped_area, 3461 }, 3462 { 3463 .owner = THIS_MODULE, 3464 .read = snd_pcm_read, 3465 .aio_read = snd_pcm_aio_read, 3466 .open = snd_pcm_capture_open, 3467 .release = snd_pcm_release, 3468 .llseek = no_llseek, 3469 .poll = snd_pcm_capture_poll, 3470 .unlocked_ioctl = snd_pcm_capture_ioctl, 3471 .compat_ioctl = snd_pcm_ioctl_compat, 3472 .mmap = snd_pcm_mmap, 3473 .fasync = snd_pcm_fasync, 3474 .get_unmapped_area = snd_pcm_get_unmapped_area, 3475 } 3476 }; 3477