1 /* 2 * Digital Audio (PCM) abstract layer 3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 4 * 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 * 20 */ 21 22 #include <linux/mm.h> 23 #include <linux/file.h> 24 #include <linux/slab.h> 25 #include <linux/smp_lock.h> 26 #include <linux/time.h> 27 #include <linux/pm_qos_params.h> 28 #include <linux/uio.h> 29 #include <linux/dma-mapping.h> 30 #include <sound/core.h> 31 #include <sound/control.h> 32 #include <sound/info.h> 33 #include <sound/pcm.h> 34 #include <sound/pcm_params.h> 35 #include <sound/timer.h> 36 #include <sound/minors.h> 37 #include <asm/io.h> 38 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT) 39 #include <dma-coherence.h> 40 #endif 41 42 /* 43 * Compatibility 44 */ 45 46 struct snd_pcm_hw_params_old { 47 unsigned int flags; 48 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT - 49 SNDRV_PCM_HW_PARAM_ACCESS + 1]; 50 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME - 51 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1]; 52 unsigned int rmask; 53 unsigned int cmask; 54 unsigned int info; 55 unsigned int msbits; 56 unsigned int rate_num; 57 unsigned int rate_den; 58 snd_pcm_uframes_t fifo_size; 59 unsigned char reserved[64]; 60 }; 61 62 #ifdef CONFIG_SND_SUPPORT_OLD_API 63 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old) 64 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old) 65 66 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, 67 struct snd_pcm_hw_params_old __user * _oparams); 68 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, 69 struct snd_pcm_hw_params_old __user * _oparams); 70 #endif 71 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream); 72 73 /* 74 * 75 */ 76 77 DEFINE_RWLOCK(snd_pcm_link_rwlock); 78 EXPORT_SYMBOL(snd_pcm_link_rwlock); 79 80 static DECLARE_RWSEM(snd_pcm_link_rwsem); 81 82 static inline mm_segment_t snd_enter_user(void) 83 { 84 mm_segment_t fs = get_fs(); 85 set_fs(get_ds()); 86 return fs; 87 } 88 89 static inline void snd_leave_user(mm_segment_t fs) 90 { 91 set_fs(fs); 92 } 93 94 95 96 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info) 97 { 98 struct snd_pcm_runtime *runtime; 99 struct snd_pcm *pcm = substream->pcm; 100 struct snd_pcm_str *pstr = substream->pstr; 101 102 memset(info, 0, sizeof(*info)); 103 info->card = pcm->card->number; 104 info->device = pcm->device; 105 info->stream = substream->stream; 106 info->subdevice = substream->number; 107 strlcpy(info->id, pcm->id, sizeof(info->id)); 108 strlcpy(info->name, pcm->name, sizeof(info->name)); 109 info->dev_class = pcm->dev_class; 110 info->dev_subclass = pcm->dev_subclass; 111 info->subdevices_count = pstr->substream_count; 112 info->subdevices_avail = pstr->substream_count - pstr->substream_opened; 113 strlcpy(info->subname, substream->name, sizeof(info->subname)); 114 runtime = substream->runtime; 115 /* AB: FIXME!!! This is definitely nonsense */ 116 if (runtime) { 117 info->sync = runtime->sync; 118 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info); 119 } 120 return 0; 121 } 122 123 int snd_pcm_info_user(struct snd_pcm_substream *substream, 124 struct snd_pcm_info __user * _info) 125 { 126 struct snd_pcm_info *info; 127 int err; 128 129 info = kmalloc(sizeof(*info), GFP_KERNEL); 130 if (! info) 131 return -ENOMEM; 132 err = snd_pcm_info(substream, info); 133 if (err >= 0) { 134 if (copy_to_user(_info, info, sizeof(*info))) 135 err = -EFAULT; 136 } 137 kfree(info); 138 return err; 139 } 140 141 #undef RULES_DEBUG 142 143 #ifdef RULES_DEBUG 144 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v 145 static const char * const snd_pcm_hw_param_names[] = { 146 HW_PARAM(ACCESS), 147 HW_PARAM(FORMAT), 148 HW_PARAM(SUBFORMAT), 149 HW_PARAM(SAMPLE_BITS), 150 HW_PARAM(FRAME_BITS), 151 HW_PARAM(CHANNELS), 152 HW_PARAM(RATE), 153 HW_PARAM(PERIOD_TIME), 154 HW_PARAM(PERIOD_SIZE), 155 HW_PARAM(PERIOD_BYTES), 156 HW_PARAM(PERIODS), 157 HW_PARAM(BUFFER_TIME), 158 HW_PARAM(BUFFER_SIZE), 159 HW_PARAM(BUFFER_BYTES), 160 HW_PARAM(TICK_TIME), 161 }; 162 #endif 163 164 int snd_pcm_hw_refine(struct snd_pcm_substream *substream, 165 struct snd_pcm_hw_params *params) 166 { 167 unsigned int k; 168 struct snd_pcm_hardware *hw; 169 struct snd_interval *i = NULL; 170 struct snd_mask *m = NULL; 171 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints; 172 unsigned int rstamps[constrs->rules_num]; 173 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1]; 174 unsigned int stamp = 2; 175 int changed, again; 176 177 params->info = 0; 178 params->fifo_size = 0; 179 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS)) 180 params->msbits = 0; 181 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) { 182 params->rate_num = 0; 183 params->rate_den = 0; 184 } 185 186 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { 187 m = hw_param_mask(params, k); 188 if (snd_mask_empty(m)) 189 return -EINVAL; 190 if (!(params->rmask & (1 << k))) 191 continue; 192 #ifdef RULES_DEBUG 193 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]); 194 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); 195 #endif 196 changed = snd_mask_refine(m, constrs_mask(constrs, k)); 197 #ifdef RULES_DEBUG 198 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); 199 #endif 200 if (changed) 201 params->cmask |= 1 << k; 202 if (changed < 0) 203 return changed; 204 } 205 206 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { 207 i = hw_param_interval(params, k); 208 if (snd_interval_empty(i)) 209 return -EINVAL; 210 if (!(params->rmask & (1 << k))) 211 continue; 212 #ifdef RULES_DEBUG 213 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]); 214 if (i->empty) 215 printk("empty"); 216 else 217 printk("%c%u %u%c", 218 i->openmin ? '(' : '[', i->min, 219 i->max, i->openmax ? ')' : ']'); 220 printk(" -> "); 221 #endif 222 changed = snd_interval_refine(i, constrs_interval(constrs, k)); 223 #ifdef RULES_DEBUG 224 if (i->empty) 225 printk("empty\n"); 226 else 227 printk("%c%u %u%c\n", 228 i->openmin ? '(' : '[', i->min, 229 i->max, i->openmax ? ')' : ']'); 230 #endif 231 if (changed) 232 params->cmask |= 1 << k; 233 if (changed < 0) 234 return changed; 235 } 236 237 for (k = 0; k < constrs->rules_num; k++) 238 rstamps[k] = 0; 239 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) 240 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0; 241 do { 242 again = 0; 243 for (k = 0; k < constrs->rules_num; k++) { 244 struct snd_pcm_hw_rule *r = &constrs->rules[k]; 245 unsigned int d; 246 int doit = 0; 247 if (r->cond && !(r->cond & params->flags)) 248 continue; 249 for (d = 0; r->deps[d] >= 0; d++) { 250 if (vstamps[r->deps[d]] > rstamps[k]) { 251 doit = 1; 252 break; 253 } 254 } 255 if (!doit) 256 continue; 257 #ifdef RULES_DEBUG 258 printk(KERN_DEBUG "Rule %d [%p]: ", k, r->func); 259 if (r->var >= 0) { 260 printk("%s = ", snd_pcm_hw_param_names[r->var]); 261 if (hw_is_mask(r->var)) { 262 m = hw_param_mask(params, r->var); 263 printk("%x", *m->bits); 264 } else { 265 i = hw_param_interval(params, r->var); 266 if (i->empty) 267 printk("empty"); 268 else 269 printk("%c%u %u%c", 270 i->openmin ? '(' : '[', i->min, 271 i->max, i->openmax ? ')' : ']'); 272 } 273 } 274 #endif 275 changed = r->func(params, r); 276 #ifdef RULES_DEBUG 277 if (r->var >= 0) { 278 printk(" -> "); 279 if (hw_is_mask(r->var)) 280 printk("%x", *m->bits); 281 else { 282 if (i->empty) 283 printk("empty"); 284 else 285 printk("%c%u %u%c", 286 i->openmin ? '(' : '[', i->min, 287 i->max, i->openmax ? ')' : ']'); 288 } 289 } 290 printk("\n"); 291 #endif 292 rstamps[k] = stamp; 293 if (changed && r->var >= 0) { 294 params->cmask |= (1 << r->var); 295 vstamps[r->var] = stamp; 296 again = 1; 297 } 298 if (changed < 0) 299 return changed; 300 stamp++; 301 } 302 } while (again); 303 if (!params->msbits) { 304 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); 305 if (snd_interval_single(i)) 306 params->msbits = snd_interval_value(i); 307 } 308 309 if (!params->rate_den) { 310 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); 311 if (snd_interval_single(i)) { 312 params->rate_num = snd_interval_value(i); 313 params->rate_den = 1; 314 } 315 } 316 317 hw = &substream->runtime->hw; 318 if (!params->info) 319 params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES; 320 if (!params->fifo_size) { 321 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 322 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 323 if (snd_mask_min(m) == snd_mask_max(m) && 324 snd_interval_min(i) == snd_interval_max(i)) { 325 changed = substream->ops->ioctl(substream, 326 SNDRV_PCM_IOCTL1_FIFO_SIZE, params); 327 if (changed < 0) 328 return changed; 329 } 330 } 331 params->rmask = 0; 332 return 0; 333 } 334 335 EXPORT_SYMBOL(snd_pcm_hw_refine); 336 337 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream, 338 struct snd_pcm_hw_params __user * _params) 339 { 340 struct snd_pcm_hw_params *params; 341 int err; 342 343 params = memdup_user(_params, sizeof(*params)); 344 if (IS_ERR(params)) 345 return PTR_ERR(params); 346 347 err = snd_pcm_hw_refine(substream, params); 348 if (copy_to_user(_params, params, sizeof(*params))) { 349 if (!err) 350 err = -EFAULT; 351 } 352 353 kfree(params); 354 return err; 355 } 356 357 static int period_to_usecs(struct snd_pcm_runtime *runtime) 358 { 359 int usecs; 360 361 if (! runtime->rate) 362 return -1; /* invalid */ 363 364 /* take 75% of period time as the deadline */ 365 usecs = (750000 / runtime->rate) * runtime->period_size; 366 usecs += ((750000 % runtime->rate) * runtime->period_size) / 367 runtime->rate; 368 369 return usecs; 370 } 371 372 static int snd_pcm_hw_params(struct snd_pcm_substream *substream, 373 struct snd_pcm_hw_params *params) 374 { 375 struct snd_pcm_runtime *runtime; 376 int err, usecs; 377 unsigned int bits; 378 snd_pcm_uframes_t frames; 379 380 if (PCM_RUNTIME_CHECK(substream)) 381 return -ENXIO; 382 runtime = substream->runtime; 383 snd_pcm_stream_lock_irq(substream); 384 switch (runtime->status->state) { 385 case SNDRV_PCM_STATE_OPEN: 386 case SNDRV_PCM_STATE_SETUP: 387 case SNDRV_PCM_STATE_PREPARED: 388 break; 389 default: 390 snd_pcm_stream_unlock_irq(substream); 391 return -EBADFD; 392 } 393 snd_pcm_stream_unlock_irq(substream); 394 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 395 if (!substream->oss.oss) 396 #endif 397 if (atomic_read(&substream->mmap_count)) 398 return -EBADFD; 399 400 params->rmask = ~0U; 401 err = snd_pcm_hw_refine(substream, params); 402 if (err < 0) 403 goto _error; 404 405 err = snd_pcm_hw_params_choose(substream, params); 406 if (err < 0) 407 goto _error; 408 409 if (substream->ops->hw_params != NULL) { 410 err = substream->ops->hw_params(substream, params); 411 if (err < 0) 412 goto _error; 413 } 414 415 runtime->access = params_access(params); 416 runtime->format = params_format(params); 417 runtime->subformat = params_subformat(params); 418 runtime->channels = params_channels(params); 419 runtime->rate = params_rate(params); 420 runtime->period_size = params_period_size(params); 421 runtime->periods = params_periods(params); 422 runtime->buffer_size = params_buffer_size(params); 423 runtime->info = params->info; 424 runtime->rate_num = params->rate_num; 425 runtime->rate_den = params->rate_den; 426 427 bits = snd_pcm_format_physical_width(runtime->format); 428 runtime->sample_bits = bits; 429 bits *= runtime->channels; 430 runtime->frame_bits = bits; 431 frames = 1; 432 while (bits % 8 != 0) { 433 bits *= 2; 434 frames *= 2; 435 } 436 runtime->byte_align = bits / 8; 437 runtime->min_align = frames; 438 439 /* Default sw params */ 440 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; 441 runtime->period_step = 1; 442 runtime->control->avail_min = runtime->period_size; 443 runtime->start_threshold = 1; 444 runtime->stop_threshold = runtime->buffer_size; 445 runtime->silence_threshold = 0; 446 runtime->silence_size = 0; 447 runtime->boundary = runtime->buffer_size; 448 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size) 449 runtime->boundary *= 2; 450 451 snd_pcm_timer_resolution_change(substream); 452 runtime->status->state = SNDRV_PCM_STATE_SETUP; 453 454 if (pm_qos_request_active(&substream->latency_pm_qos_req)) 455 pm_qos_remove_request(&substream->latency_pm_qos_req); 456 if ((usecs = period_to_usecs(runtime)) >= 0) 457 pm_qos_add_request(&substream->latency_pm_qos_req, 458 PM_QOS_CPU_DMA_LATENCY, usecs); 459 return 0; 460 _error: 461 /* hardware might be unuseable from this time, 462 so we force application to retry to set 463 the correct hardware parameter settings */ 464 runtime->status->state = SNDRV_PCM_STATE_OPEN; 465 if (substream->ops->hw_free != NULL) 466 substream->ops->hw_free(substream); 467 return err; 468 } 469 470 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream, 471 struct snd_pcm_hw_params __user * _params) 472 { 473 struct snd_pcm_hw_params *params; 474 int err; 475 476 params = memdup_user(_params, sizeof(*params)); 477 if (IS_ERR(params)) 478 return PTR_ERR(params); 479 480 err = snd_pcm_hw_params(substream, params); 481 if (copy_to_user(_params, params, sizeof(*params))) { 482 if (!err) 483 err = -EFAULT; 484 } 485 486 kfree(params); 487 return err; 488 } 489 490 static int snd_pcm_hw_free(struct snd_pcm_substream *substream) 491 { 492 struct snd_pcm_runtime *runtime; 493 int result = 0; 494 495 if (PCM_RUNTIME_CHECK(substream)) 496 return -ENXIO; 497 runtime = substream->runtime; 498 snd_pcm_stream_lock_irq(substream); 499 switch (runtime->status->state) { 500 case SNDRV_PCM_STATE_SETUP: 501 case SNDRV_PCM_STATE_PREPARED: 502 break; 503 default: 504 snd_pcm_stream_unlock_irq(substream); 505 return -EBADFD; 506 } 507 snd_pcm_stream_unlock_irq(substream); 508 if (atomic_read(&substream->mmap_count)) 509 return -EBADFD; 510 if (substream->ops->hw_free) 511 result = substream->ops->hw_free(substream); 512 runtime->status->state = SNDRV_PCM_STATE_OPEN; 513 pm_qos_remove_request(&substream->latency_pm_qos_req); 514 return result; 515 } 516 517 static int snd_pcm_sw_params(struct snd_pcm_substream *substream, 518 struct snd_pcm_sw_params *params) 519 { 520 struct snd_pcm_runtime *runtime; 521 int err; 522 523 if (PCM_RUNTIME_CHECK(substream)) 524 return -ENXIO; 525 runtime = substream->runtime; 526 snd_pcm_stream_lock_irq(substream); 527 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 528 snd_pcm_stream_unlock_irq(substream); 529 return -EBADFD; 530 } 531 snd_pcm_stream_unlock_irq(substream); 532 533 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST) 534 return -EINVAL; 535 if (params->avail_min == 0) 536 return -EINVAL; 537 if (params->silence_size >= runtime->boundary) { 538 if (params->silence_threshold != 0) 539 return -EINVAL; 540 } else { 541 if (params->silence_size > params->silence_threshold) 542 return -EINVAL; 543 if (params->silence_threshold > runtime->buffer_size) 544 return -EINVAL; 545 } 546 err = 0; 547 snd_pcm_stream_lock_irq(substream); 548 runtime->tstamp_mode = params->tstamp_mode; 549 runtime->period_step = params->period_step; 550 runtime->control->avail_min = params->avail_min; 551 runtime->start_threshold = params->start_threshold; 552 runtime->stop_threshold = params->stop_threshold; 553 runtime->silence_threshold = params->silence_threshold; 554 runtime->silence_size = params->silence_size; 555 params->boundary = runtime->boundary; 556 if (snd_pcm_running(substream)) { 557 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 558 runtime->silence_size > 0) 559 snd_pcm_playback_silence(substream, ULONG_MAX); 560 err = snd_pcm_update_state(substream, runtime); 561 } 562 snd_pcm_stream_unlock_irq(substream); 563 return err; 564 } 565 566 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream, 567 struct snd_pcm_sw_params __user * _params) 568 { 569 struct snd_pcm_sw_params params; 570 int err; 571 if (copy_from_user(¶ms, _params, sizeof(params))) 572 return -EFAULT; 573 err = snd_pcm_sw_params(substream, ¶ms); 574 if (copy_to_user(_params, ¶ms, sizeof(params))) 575 return -EFAULT; 576 return err; 577 } 578 579 int snd_pcm_status(struct snd_pcm_substream *substream, 580 struct snd_pcm_status *status) 581 { 582 struct snd_pcm_runtime *runtime = substream->runtime; 583 584 snd_pcm_stream_lock_irq(substream); 585 status->state = runtime->status->state; 586 status->suspended_state = runtime->status->suspended_state; 587 if (status->state == SNDRV_PCM_STATE_OPEN) 588 goto _end; 589 status->trigger_tstamp = runtime->trigger_tstamp; 590 if (snd_pcm_running(substream)) { 591 snd_pcm_update_hw_ptr(substream); 592 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { 593 status->tstamp = runtime->status->tstamp; 594 goto _tstamp_end; 595 } 596 } 597 snd_pcm_gettime(runtime, &status->tstamp); 598 _tstamp_end: 599 status->appl_ptr = runtime->control->appl_ptr; 600 status->hw_ptr = runtime->status->hw_ptr; 601 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 602 status->avail = snd_pcm_playback_avail(runtime); 603 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING || 604 runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 605 status->delay = runtime->buffer_size - status->avail; 606 status->delay += runtime->delay; 607 } else 608 status->delay = 0; 609 } else { 610 status->avail = snd_pcm_capture_avail(runtime); 611 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) 612 status->delay = status->avail + runtime->delay; 613 else 614 status->delay = 0; 615 } 616 status->avail_max = runtime->avail_max; 617 status->overrange = runtime->overrange; 618 runtime->avail_max = 0; 619 runtime->overrange = 0; 620 _end: 621 snd_pcm_stream_unlock_irq(substream); 622 return 0; 623 } 624 625 static int snd_pcm_status_user(struct snd_pcm_substream *substream, 626 struct snd_pcm_status __user * _status) 627 { 628 struct snd_pcm_status status; 629 int res; 630 631 memset(&status, 0, sizeof(status)); 632 res = snd_pcm_status(substream, &status); 633 if (res < 0) 634 return res; 635 if (copy_to_user(_status, &status, sizeof(status))) 636 return -EFAULT; 637 return 0; 638 } 639 640 static int snd_pcm_channel_info(struct snd_pcm_substream *substream, 641 struct snd_pcm_channel_info * info) 642 { 643 struct snd_pcm_runtime *runtime; 644 unsigned int channel; 645 646 channel = info->channel; 647 runtime = substream->runtime; 648 snd_pcm_stream_lock_irq(substream); 649 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 650 snd_pcm_stream_unlock_irq(substream); 651 return -EBADFD; 652 } 653 snd_pcm_stream_unlock_irq(substream); 654 if (channel >= runtime->channels) 655 return -EINVAL; 656 memset(info, 0, sizeof(*info)); 657 info->channel = channel; 658 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info); 659 } 660 661 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream, 662 struct snd_pcm_channel_info __user * _info) 663 { 664 struct snd_pcm_channel_info info; 665 int res; 666 667 if (copy_from_user(&info, _info, sizeof(info))) 668 return -EFAULT; 669 res = snd_pcm_channel_info(substream, &info); 670 if (res < 0) 671 return res; 672 if (copy_to_user(_info, &info, sizeof(info))) 673 return -EFAULT; 674 return 0; 675 } 676 677 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream) 678 { 679 struct snd_pcm_runtime *runtime = substream->runtime; 680 if (runtime->trigger_master == NULL) 681 return; 682 if (runtime->trigger_master == substream) { 683 snd_pcm_gettime(runtime, &runtime->trigger_tstamp); 684 } else { 685 snd_pcm_trigger_tstamp(runtime->trigger_master); 686 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp; 687 } 688 runtime->trigger_master = NULL; 689 } 690 691 struct action_ops { 692 int (*pre_action)(struct snd_pcm_substream *substream, int state); 693 int (*do_action)(struct snd_pcm_substream *substream, int state); 694 void (*undo_action)(struct snd_pcm_substream *substream, int state); 695 void (*post_action)(struct snd_pcm_substream *substream, int state); 696 }; 697 698 /* 699 * this functions is core for handling of linked stream 700 * Note: the stream state might be changed also on failure 701 * Note2: call with calling stream lock + link lock 702 */ 703 static int snd_pcm_action_group(struct action_ops *ops, 704 struct snd_pcm_substream *substream, 705 int state, int do_lock) 706 { 707 struct snd_pcm_substream *s = NULL; 708 struct snd_pcm_substream *s1; 709 int res = 0; 710 711 snd_pcm_group_for_each_entry(s, substream) { 712 if (do_lock && s != substream) 713 spin_lock_nested(&s->self_group.lock, 714 SINGLE_DEPTH_NESTING); 715 res = ops->pre_action(s, state); 716 if (res < 0) 717 goto _unlock; 718 } 719 snd_pcm_group_for_each_entry(s, substream) { 720 res = ops->do_action(s, state); 721 if (res < 0) { 722 if (ops->undo_action) { 723 snd_pcm_group_for_each_entry(s1, substream) { 724 if (s1 == s) /* failed stream */ 725 break; 726 ops->undo_action(s1, state); 727 } 728 } 729 s = NULL; /* unlock all */ 730 goto _unlock; 731 } 732 } 733 snd_pcm_group_for_each_entry(s, substream) { 734 ops->post_action(s, state); 735 } 736 _unlock: 737 if (do_lock) { 738 /* unlock streams */ 739 snd_pcm_group_for_each_entry(s1, substream) { 740 if (s1 != substream) 741 spin_unlock(&s1->self_group.lock); 742 if (s1 == s) /* end */ 743 break; 744 } 745 } 746 return res; 747 } 748 749 /* 750 * Note: call with stream lock 751 */ 752 static int snd_pcm_action_single(struct action_ops *ops, 753 struct snd_pcm_substream *substream, 754 int state) 755 { 756 int res; 757 758 res = ops->pre_action(substream, state); 759 if (res < 0) 760 return res; 761 res = ops->do_action(substream, state); 762 if (res == 0) 763 ops->post_action(substream, state); 764 else if (ops->undo_action) 765 ops->undo_action(substream, state); 766 return res; 767 } 768 769 /* 770 * Note: call with stream lock 771 */ 772 static int snd_pcm_action(struct action_ops *ops, 773 struct snd_pcm_substream *substream, 774 int state) 775 { 776 int res; 777 778 if (snd_pcm_stream_linked(substream)) { 779 if (!spin_trylock(&substream->group->lock)) { 780 spin_unlock(&substream->self_group.lock); 781 spin_lock(&substream->group->lock); 782 spin_lock(&substream->self_group.lock); 783 } 784 res = snd_pcm_action_group(ops, substream, state, 1); 785 spin_unlock(&substream->group->lock); 786 } else { 787 res = snd_pcm_action_single(ops, substream, state); 788 } 789 return res; 790 } 791 792 /* 793 * Note: don't use any locks before 794 */ 795 static int snd_pcm_action_lock_irq(struct action_ops *ops, 796 struct snd_pcm_substream *substream, 797 int state) 798 { 799 int res; 800 801 read_lock_irq(&snd_pcm_link_rwlock); 802 if (snd_pcm_stream_linked(substream)) { 803 spin_lock(&substream->group->lock); 804 spin_lock(&substream->self_group.lock); 805 res = snd_pcm_action_group(ops, substream, state, 1); 806 spin_unlock(&substream->self_group.lock); 807 spin_unlock(&substream->group->lock); 808 } else { 809 spin_lock(&substream->self_group.lock); 810 res = snd_pcm_action_single(ops, substream, state); 811 spin_unlock(&substream->self_group.lock); 812 } 813 read_unlock_irq(&snd_pcm_link_rwlock); 814 return res; 815 } 816 817 /* 818 */ 819 static int snd_pcm_action_nonatomic(struct action_ops *ops, 820 struct snd_pcm_substream *substream, 821 int state) 822 { 823 int res; 824 825 down_read(&snd_pcm_link_rwsem); 826 if (snd_pcm_stream_linked(substream)) 827 res = snd_pcm_action_group(ops, substream, state, 0); 828 else 829 res = snd_pcm_action_single(ops, substream, state); 830 up_read(&snd_pcm_link_rwsem); 831 return res; 832 } 833 834 /* 835 * start callbacks 836 */ 837 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state) 838 { 839 struct snd_pcm_runtime *runtime = substream->runtime; 840 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED) 841 return -EBADFD; 842 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 843 !snd_pcm_playback_data(substream)) 844 return -EPIPE; 845 runtime->trigger_master = substream; 846 return 0; 847 } 848 849 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state) 850 { 851 if (substream->runtime->trigger_master != substream) 852 return 0; 853 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START); 854 } 855 856 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state) 857 { 858 if (substream->runtime->trigger_master == substream) 859 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); 860 } 861 862 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state) 863 { 864 struct snd_pcm_runtime *runtime = substream->runtime; 865 snd_pcm_trigger_tstamp(substream); 866 runtime->hw_ptr_jiffies = jiffies; 867 runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) / 868 runtime->rate; 869 runtime->status->state = state; 870 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 871 runtime->silence_size > 0) 872 snd_pcm_playback_silence(substream, ULONG_MAX); 873 if (substream->timer) 874 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART, 875 &runtime->trigger_tstamp); 876 } 877 878 static struct action_ops snd_pcm_action_start = { 879 .pre_action = snd_pcm_pre_start, 880 .do_action = snd_pcm_do_start, 881 .undo_action = snd_pcm_undo_start, 882 .post_action = snd_pcm_post_start 883 }; 884 885 /** 886 * snd_pcm_start - start all linked streams 887 * @substream: the PCM substream instance 888 */ 889 int snd_pcm_start(struct snd_pcm_substream *substream) 890 { 891 return snd_pcm_action(&snd_pcm_action_start, substream, 892 SNDRV_PCM_STATE_RUNNING); 893 } 894 895 /* 896 * stop callbacks 897 */ 898 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state) 899 { 900 struct snd_pcm_runtime *runtime = substream->runtime; 901 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 902 return -EBADFD; 903 runtime->trigger_master = substream; 904 return 0; 905 } 906 907 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state) 908 { 909 if (substream->runtime->trigger_master == substream && 910 snd_pcm_running(substream)) 911 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); 912 return 0; /* unconditonally stop all substreams */ 913 } 914 915 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state) 916 { 917 struct snd_pcm_runtime *runtime = substream->runtime; 918 if (runtime->status->state != state) { 919 snd_pcm_trigger_tstamp(substream); 920 if (substream->timer) 921 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP, 922 &runtime->trigger_tstamp); 923 runtime->status->state = state; 924 } 925 wake_up(&runtime->sleep); 926 wake_up(&runtime->tsleep); 927 } 928 929 static struct action_ops snd_pcm_action_stop = { 930 .pre_action = snd_pcm_pre_stop, 931 .do_action = snd_pcm_do_stop, 932 .post_action = snd_pcm_post_stop 933 }; 934 935 /** 936 * snd_pcm_stop - try to stop all running streams in the substream group 937 * @substream: the PCM substream instance 938 * @state: PCM state after stopping the stream 939 * 940 * The state of each stream is then changed to the given state unconditionally. 941 */ 942 int snd_pcm_stop(struct snd_pcm_substream *substream, int state) 943 { 944 return snd_pcm_action(&snd_pcm_action_stop, substream, state); 945 } 946 947 EXPORT_SYMBOL(snd_pcm_stop); 948 949 /** 950 * snd_pcm_drain_done - stop the DMA only when the given stream is playback 951 * @substream: the PCM substream 952 * 953 * After stopping, the state is changed to SETUP. 954 * Unlike snd_pcm_stop(), this affects only the given stream. 955 */ 956 int snd_pcm_drain_done(struct snd_pcm_substream *substream) 957 { 958 return snd_pcm_action_single(&snd_pcm_action_stop, substream, 959 SNDRV_PCM_STATE_SETUP); 960 } 961 962 /* 963 * pause callbacks 964 */ 965 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push) 966 { 967 struct snd_pcm_runtime *runtime = substream->runtime; 968 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE)) 969 return -ENOSYS; 970 if (push) { 971 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING) 972 return -EBADFD; 973 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED) 974 return -EBADFD; 975 runtime->trigger_master = substream; 976 return 0; 977 } 978 979 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push) 980 { 981 if (substream->runtime->trigger_master != substream) 982 return 0; 983 /* some drivers might use hw_ptr to recover from the pause - 984 update the hw_ptr now */ 985 if (push) 986 snd_pcm_update_hw_ptr(substream); 987 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by 988 * a delta betwen the current jiffies, this gives a large enough 989 * delta, effectively to skip the check once. 990 */ 991 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000; 992 return substream->ops->trigger(substream, 993 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH : 994 SNDRV_PCM_TRIGGER_PAUSE_RELEASE); 995 } 996 997 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push) 998 { 999 if (substream->runtime->trigger_master == substream) 1000 substream->ops->trigger(substream, 1001 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE : 1002 SNDRV_PCM_TRIGGER_PAUSE_PUSH); 1003 } 1004 1005 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push) 1006 { 1007 struct snd_pcm_runtime *runtime = substream->runtime; 1008 snd_pcm_trigger_tstamp(substream); 1009 if (push) { 1010 runtime->status->state = SNDRV_PCM_STATE_PAUSED; 1011 if (substream->timer) 1012 snd_timer_notify(substream->timer, 1013 SNDRV_TIMER_EVENT_MPAUSE, 1014 &runtime->trigger_tstamp); 1015 wake_up(&runtime->sleep); 1016 wake_up(&runtime->tsleep); 1017 } else { 1018 runtime->status->state = SNDRV_PCM_STATE_RUNNING; 1019 if (substream->timer) 1020 snd_timer_notify(substream->timer, 1021 SNDRV_TIMER_EVENT_MCONTINUE, 1022 &runtime->trigger_tstamp); 1023 } 1024 } 1025 1026 static struct action_ops snd_pcm_action_pause = { 1027 .pre_action = snd_pcm_pre_pause, 1028 .do_action = snd_pcm_do_pause, 1029 .undo_action = snd_pcm_undo_pause, 1030 .post_action = snd_pcm_post_pause 1031 }; 1032 1033 /* 1034 * Push/release the pause for all linked streams. 1035 */ 1036 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push) 1037 { 1038 return snd_pcm_action(&snd_pcm_action_pause, substream, push); 1039 } 1040 1041 #ifdef CONFIG_PM 1042 /* suspend */ 1043 1044 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state) 1045 { 1046 struct snd_pcm_runtime *runtime = substream->runtime; 1047 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1048 return -EBUSY; 1049 runtime->trigger_master = substream; 1050 return 0; 1051 } 1052 1053 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state) 1054 { 1055 struct snd_pcm_runtime *runtime = substream->runtime; 1056 if (runtime->trigger_master != substream) 1057 return 0; 1058 if (! snd_pcm_running(substream)) 1059 return 0; 1060 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); 1061 return 0; /* suspend unconditionally */ 1062 } 1063 1064 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state) 1065 { 1066 struct snd_pcm_runtime *runtime = substream->runtime; 1067 snd_pcm_trigger_tstamp(substream); 1068 if (substream->timer) 1069 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND, 1070 &runtime->trigger_tstamp); 1071 runtime->status->suspended_state = runtime->status->state; 1072 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED; 1073 wake_up(&runtime->sleep); 1074 wake_up(&runtime->tsleep); 1075 } 1076 1077 static struct action_ops snd_pcm_action_suspend = { 1078 .pre_action = snd_pcm_pre_suspend, 1079 .do_action = snd_pcm_do_suspend, 1080 .post_action = snd_pcm_post_suspend 1081 }; 1082 1083 /** 1084 * snd_pcm_suspend - trigger SUSPEND to all linked streams 1085 * @substream: the PCM substream 1086 * 1087 * After this call, all streams are changed to SUSPENDED state. 1088 */ 1089 int snd_pcm_suspend(struct snd_pcm_substream *substream) 1090 { 1091 int err; 1092 unsigned long flags; 1093 1094 if (! substream) 1095 return 0; 1096 1097 snd_pcm_stream_lock_irqsave(substream, flags); 1098 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0); 1099 snd_pcm_stream_unlock_irqrestore(substream, flags); 1100 return err; 1101 } 1102 1103 EXPORT_SYMBOL(snd_pcm_suspend); 1104 1105 /** 1106 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm 1107 * @pcm: the PCM instance 1108 * 1109 * After this call, all streams are changed to SUSPENDED state. 1110 */ 1111 int snd_pcm_suspend_all(struct snd_pcm *pcm) 1112 { 1113 struct snd_pcm_substream *substream; 1114 int stream, err = 0; 1115 1116 if (! pcm) 1117 return 0; 1118 1119 for (stream = 0; stream < 2; stream++) { 1120 for (substream = pcm->streams[stream].substream; 1121 substream; substream = substream->next) { 1122 /* FIXME: the open/close code should lock this as well */ 1123 if (substream->runtime == NULL) 1124 continue; 1125 err = snd_pcm_suspend(substream); 1126 if (err < 0 && err != -EBUSY) 1127 return err; 1128 } 1129 } 1130 return 0; 1131 } 1132 1133 EXPORT_SYMBOL(snd_pcm_suspend_all); 1134 1135 /* resume */ 1136 1137 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state) 1138 { 1139 struct snd_pcm_runtime *runtime = substream->runtime; 1140 if (!(runtime->info & SNDRV_PCM_INFO_RESUME)) 1141 return -ENOSYS; 1142 runtime->trigger_master = substream; 1143 return 0; 1144 } 1145 1146 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state) 1147 { 1148 struct snd_pcm_runtime *runtime = substream->runtime; 1149 if (runtime->trigger_master != substream) 1150 return 0; 1151 /* DMA not running previously? */ 1152 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING && 1153 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING || 1154 substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) 1155 return 0; 1156 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME); 1157 } 1158 1159 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state) 1160 { 1161 if (substream->runtime->trigger_master == substream && 1162 snd_pcm_running(substream)) 1163 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); 1164 } 1165 1166 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state) 1167 { 1168 struct snd_pcm_runtime *runtime = substream->runtime; 1169 snd_pcm_trigger_tstamp(substream); 1170 if (substream->timer) 1171 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME, 1172 &runtime->trigger_tstamp); 1173 runtime->status->state = runtime->status->suspended_state; 1174 } 1175 1176 static struct action_ops snd_pcm_action_resume = { 1177 .pre_action = snd_pcm_pre_resume, 1178 .do_action = snd_pcm_do_resume, 1179 .undo_action = snd_pcm_undo_resume, 1180 .post_action = snd_pcm_post_resume 1181 }; 1182 1183 static int snd_pcm_resume(struct snd_pcm_substream *substream) 1184 { 1185 struct snd_card *card = substream->pcm->card; 1186 int res; 1187 1188 snd_power_lock(card); 1189 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) 1190 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0); 1191 snd_power_unlock(card); 1192 return res; 1193 } 1194 1195 #else 1196 1197 static int snd_pcm_resume(struct snd_pcm_substream *substream) 1198 { 1199 return -ENOSYS; 1200 } 1201 1202 #endif /* CONFIG_PM */ 1203 1204 /* 1205 * xrun ioctl 1206 * 1207 * Change the RUNNING stream(s) to XRUN state. 1208 */ 1209 static int snd_pcm_xrun(struct snd_pcm_substream *substream) 1210 { 1211 struct snd_card *card = substream->pcm->card; 1212 struct snd_pcm_runtime *runtime = substream->runtime; 1213 int result; 1214 1215 snd_power_lock(card); 1216 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1217 result = snd_power_wait(card, SNDRV_CTL_POWER_D0); 1218 if (result < 0) 1219 goto _unlock; 1220 } 1221 1222 snd_pcm_stream_lock_irq(substream); 1223 switch (runtime->status->state) { 1224 case SNDRV_PCM_STATE_XRUN: 1225 result = 0; /* already there */ 1226 break; 1227 case SNDRV_PCM_STATE_RUNNING: 1228 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); 1229 break; 1230 default: 1231 result = -EBADFD; 1232 } 1233 snd_pcm_stream_unlock_irq(substream); 1234 _unlock: 1235 snd_power_unlock(card); 1236 return result; 1237 } 1238 1239 /* 1240 * reset ioctl 1241 */ 1242 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state) 1243 { 1244 struct snd_pcm_runtime *runtime = substream->runtime; 1245 switch (runtime->status->state) { 1246 case SNDRV_PCM_STATE_RUNNING: 1247 case SNDRV_PCM_STATE_PREPARED: 1248 case SNDRV_PCM_STATE_PAUSED: 1249 case SNDRV_PCM_STATE_SUSPENDED: 1250 return 0; 1251 default: 1252 return -EBADFD; 1253 } 1254 } 1255 1256 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state) 1257 { 1258 struct snd_pcm_runtime *runtime = substream->runtime; 1259 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL); 1260 if (err < 0) 1261 return err; 1262 runtime->hw_ptr_base = 0; 1263 runtime->hw_ptr_interrupt = runtime->status->hw_ptr - 1264 runtime->status->hw_ptr % runtime->period_size; 1265 runtime->silence_start = runtime->status->hw_ptr; 1266 runtime->silence_filled = 0; 1267 return 0; 1268 } 1269 1270 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state) 1271 { 1272 struct snd_pcm_runtime *runtime = substream->runtime; 1273 runtime->control->appl_ptr = runtime->status->hw_ptr; 1274 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 1275 runtime->silence_size > 0) 1276 snd_pcm_playback_silence(substream, ULONG_MAX); 1277 } 1278 1279 static struct action_ops snd_pcm_action_reset = { 1280 .pre_action = snd_pcm_pre_reset, 1281 .do_action = snd_pcm_do_reset, 1282 .post_action = snd_pcm_post_reset 1283 }; 1284 1285 static int snd_pcm_reset(struct snd_pcm_substream *substream) 1286 { 1287 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0); 1288 } 1289 1290 /* 1291 * prepare ioctl 1292 */ 1293 /* we use the second argument for updating f_flags */ 1294 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream, 1295 int f_flags) 1296 { 1297 struct snd_pcm_runtime *runtime = substream->runtime; 1298 if (runtime->status->state == SNDRV_PCM_STATE_OPEN || 1299 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED) 1300 return -EBADFD; 1301 if (snd_pcm_running(substream)) 1302 return -EBUSY; 1303 substream->f_flags = f_flags; 1304 return 0; 1305 } 1306 1307 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state) 1308 { 1309 int err; 1310 err = substream->ops->prepare(substream); 1311 if (err < 0) 1312 return err; 1313 return snd_pcm_do_reset(substream, 0); 1314 } 1315 1316 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state) 1317 { 1318 struct snd_pcm_runtime *runtime = substream->runtime; 1319 runtime->control->appl_ptr = runtime->status->hw_ptr; 1320 runtime->status->state = SNDRV_PCM_STATE_PREPARED; 1321 } 1322 1323 static struct action_ops snd_pcm_action_prepare = { 1324 .pre_action = snd_pcm_pre_prepare, 1325 .do_action = snd_pcm_do_prepare, 1326 .post_action = snd_pcm_post_prepare 1327 }; 1328 1329 /** 1330 * snd_pcm_prepare - prepare the PCM substream to be triggerable 1331 * @substream: the PCM substream instance 1332 * @file: file to refer f_flags 1333 */ 1334 static int snd_pcm_prepare(struct snd_pcm_substream *substream, 1335 struct file *file) 1336 { 1337 int res; 1338 struct snd_card *card = substream->pcm->card; 1339 int f_flags; 1340 1341 if (file) 1342 f_flags = file->f_flags; 1343 else 1344 f_flags = substream->f_flags; 1345 1346 snd_power_lock(card); 1347 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) 1348 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare, 1349 substream, f_flags); 1350 snd_power_unlock(card); 1351 return res; 1352 } 1353 1354 /* 1355 * drain ioctl 1356 */ 1357 1358 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state) 1359 { 1360 substream->runtime->trigger_master = substream; 1361 return 0; 1362 } 1363 1364 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state) 1365 { 1366 struct snd_pcm_runtime *runtime = substream->runtime; 1367 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 1368 switch (runtime->status->state) { 1369 case SNDRV_PCM_STATE_PREPARED: 1370 /* start playback stream if possible */ 1371 if (! snd_pcm_playback_empty(substream)) { 1372 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING); 1373 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING); 1374 } 1375 break; 1376 case SNDRV_PCM_STATE_RUNNING: 1377 runtime->status->state = SNDRV_PCM_STATE_DRAINING; 1378 break; 1379 default: 1380 break; 1381 } 1382 } else { 1383 /* stop running stream */ 1384 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) { 1385 int new_state = snd_pcm_capture_avail(runtime) > 0 ? 1386 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP; 1387 snd_pcm_do_stop(substream, new_state); 1388 snd_pcm_post_stop(substream, new_state); 1389 } 1390 } 1391 return 0; 1392 } 1393 1394 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state) 1395 { 1396 } 1397 1398 static struct action_ops snd_pcm_action_drain_init = { 1399 .pre_action = snd_pcm_pre_drain_init, 1400 .do_action = snd_pcm_do_drain_init, 1401 .post_action = snd_pcm_post_drain_init 1402 }; 1403 1404 static int snd_pcm_drop(struct snd_pcm_substream *substream); 1405 1406 /* 1407 * Drain the stream(s). 1408 * When the substream is linked, sync until the draining of all playback streams 1409 * is finished. 1410 * After this call, all streams are supposed to be either SETUP or DRAINING 1411 * (capture only) state. 1412 */ 1413 static int snd_pcm_drain(struct snd_pcm_substream *substream, 1414 struct file *file) 1415 { 1416 struct snd_card *card; 1417 struct snd_pcm_runtime *runtime; 1418 struct snd_pcm_substream *s; 1419 wait_queue_t wait; 1420 int result = 0; 1421 int nonblock = 0; 1422 1423 card = substream->pcm->card; 1424 runtime = substream->runtime; 1425 1426 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 1427 return -EBADFD; 1428 1429 snd_power_lock(card); 1430 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1431 result = snd_power_wait(card, SNDRV_CTL_POWER_D0); 1432 if (result < 0) { 1433 snd_power_unlock(card); 1434 return result; 1435 } 1436 } 1437 1438 if (file) { 1439 if (file->f_flags & O_NONBLOCK) 1440 nonblock = 1; 1441 } else if (substream->f_flags & O_NONBLOCK) 1442 nonblock = 1; 1443 1444 down_read(&snd_pcm_link_rwsem); 1445 snd_pcm_stream_lock_irq(substream); 1446 /* resume pause */ 1447 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) 1448 snd_pcm_pause(substream, 0); 1449 1450 /* pre-start/stop - all running streams are changed to DRAINING state */ 1451 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0); 1452 if (result < 0) 1453 goto unlock; 1454 /* in non-blocking, we don't wait in ioctl but let caller poll */ 1455 if (nonblock) { 1456 result = -EAGAIN; 1457 goto unlock; 1458 } 1459 1460 for (;;) { 1461 long tout; 1462 struct snd_pcm_runtime *to_check; 1463 if (signal_pending(current)) { 1464 result = -ERESTARTSYS; 1465 break; 1466 } 1467 /* find a substream to drain */ 1468 to_check = NULL; 1469 snd_pcm_group_for_each_entry(s, substream) { 1470 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK) 1471 continue; 1472 runtime = s->runtime; 1473 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 1474 to_check = runtime; 1475 break; 1476 } 1477 } 1478 if (!to_check) 1479 break; /* all drained */ 1480 init_waitqueue_entry(&wait, current); 1481 add_wait_queue(&to_check->sleep, &wait); 1482 set_current_state(TASK_INTERRUPTIBLE); 1483 snd_pcm_stream_unlock_irq(substream); 1484 up_read(&snd_pcm_link_rwsem); 1485 snd_power_unlock(card); 1486 tout = schedule_timeout(10 * HZ); 1487 snd_power_lock(card); 1488 down_read(&snd_pcm_link_rwsem); 1489 snd_pcm_stream_lock_irq(substream); 1490 remove_wait_queue(&to_check->sleep, &wait); 1491 if (tout == 0) { 1492 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1493 result = -ESTRPIPE; 1494 else { 1495 snd_printd("playback drain error (DMA or IRQ trouble?)\n"); 1496 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1497 result = -EIO; 1498 } 1499 break; 1500 } 1501 } 1502 1503 unlock: 1504 snd_pcm_stream_unlock_irq(substream); 1505 up_read(&snd_pcm_link_rwsem); 1506 snd_power_unlock(card); 1507 1508 return result; 1509 } 1510 1511 /* 1512 * drop ioctl 1513 * 1514 * Immediately put all linked substreams into SETUP state. 1515 */ 1516 static int snd_pcm_drop(struct snd_pcm_substream *substream) 1517 { 1518 struct snd_pcm_runtime *runtime; 1519 struct snd_card *card; 1520 int result = 0; 1521 1522 if (PCM_RUNTIME_CHECK(substream)) 1523 return -ENXIO; 1524 runtime = substream->runtime; 1525 card = substream->pcm->card; 1526 1527 if (runtime->status->state == SNDRV_PCM_STATE_OPEN || 1528 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED || 1529 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1530 return -EBADFD; 1531 1532 snd_pcm_stream_lock_irq(substream); 1533 /* resume pause */ 1534 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) 1535 snd_pcm_pause(substream, 0); 1536 1537 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1538 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */ 1539 snd_pcm_stream_unlock_irq(substream); 1540 1541 return result; 1542 } 1543 1544 1545 /* WARNING: Don't forget to fput back the file */ 1546 static struct file *snd_pcm_file_fd(int fd) 1547 { 1548 struct file *file; 1549 struct inode *inode; 1550 unsigned int minor; 1551 1552 file = fget(fd); 1553 if (!file) 1554 return NULL; 1555 inode = file->f_path.dentry->d_inode; 1556 if (!S_ISCHR(inode->i_mode) || 1557 imajor(inode) != snd_major) { 1558 fput(file); 1559 return NULL; 1560 } 1561 minor = iminor(inode); 1562 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) && 1563 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) { 1564 fput(file); 1565 return NULL; 1566 } 1567 return file; 1568 } 1569 1570 /* 1571 * PCM link handling 1572 */ 1573 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd) 1574 { 1575 int res = 0; 1576 struct file *file; 1577 struct snd_pcm_file *pcm_file; 1578 struct snd_pcm_substream *substream1; 1579 1580 file = snd_pcm_file_fd(fd); 1581 if (!file) 1582 return -EBADFD; 1583 pcm_file = file->private_data; 1584 substream1 = pcm_file->substream; 1585 down_write(&snd_pcm_link_rwsem); 1586 write_lock_irq(&snd_pcm_link_rwlock); 1587 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN || 1588 substream->runtime->status->state != substream1->runtime->status->state) { 1589 res = -EBADFD; 1590 goto _end; 1591 } 1592 if (snd_pcm_stream_linked(substream1)) { 1593 res = -EALREADY; 1594 goto _end; 1595 } 1596 if (!snd_pcm_stream_linked(substream)) { 1597 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC); 1598 if (substream->group == NULL) { 1599 res = -ENOMEM; 1600 goto _end; 1601 } 1602 spin_lock_init(&substream->group->lock); 1603 INIT_LIST_HEAD(&substream->group->substreams); 1604 list_add_tail(&substream->link_list, &substream->group->substreams); 1605 substream->group->count = 1; 1606 } 1607 list_add_tail(&substream1->link_list, &substream->group->substreams); 1608 substream->group->count++; 1609 substream1->group = substream->group; 1610 _end: 1611 write_unlock_irq(&snd_pcm_link_rwlock); 1612 up_write(&snd_pcm_link_rwsem); 1613 fput(file); 1614 return res; 1615 } 1616 1617 static void relink_to_local(struct snd_pcm_substream *substream) 1618 { 1619 substream->group = &substream->self_group; 1620 INIT_LIST_HEAD(&substream->self_group.substreams); 1621 list_add_tail(&substream->link_list, &substream->self_group.substreams); 1622 } 1623 1624 static int snd_pcm_unlink(struct snd_pcm_substream *substream) 1625 { 1626 struct snd_pcm_substream *s; 1627 int res = 0; 1628 1629 down_write(&snd_pcm_link_rwsem); 1630 write_lock_irq(&snd_pcm_link_rwlock); 1631 if (!snd_pcm_stream_linked(substream)) { 1632 res = -EALREADY; 1633 goto _end; 1634 } 1635 list_del(&substream->link_list); 1636 substream->group->count--; 1637 if (substream->group->count == 1) { /* detach the last stream, too */ 1638 snd_pcm_group_for_each_entry(s, substream) { 1639 relink_to_local(s); 1640 break; 1641 } 1642 kfree(substream->group); 1643 } 1644 relink_to_local(substream); 1645 _end: 1646 write_unlock_irq(&snd_pcm_link_rwlock); 1647 up_write(&snd_pcm_link_rwsem); 1648 return res; 1649 } 1650 1651 /* 1652 * hw configurator 1653 */ 1654 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params, 1655 struct snd_pcm_hw_rule *rule) 1656 { 1657 struct snd_interval t; 1658 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]), 1659 hw_param_interval_c(params, rule->deps[1]), &t); 1660 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1661 } 1662 1663 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params, 1664 struct snd_pcm_hw_rule *rule) 1665 { 1666 struct snd_interval t; 1667 snd_interval_div(hw_param_interval_c(params, rule->deps[0]), 1668 hw_param_interval_c(params, rule->deps[1]), &t); 1669 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1670 } 1671 1672 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params, 1673 struct snd_pcm_hw_rule *rule) 1674 { 1675 struct snd_interval t; 1676 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]), 1677 hw_param_interval_c(params, rule->deps[1]), 1678 (unsigned long) rule->private, &t); 1679 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1680 } 1681 1682 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params, 1683 struct snd_pcm_hw_rule *rule) 1684 { 1685 struct snd_interval t; 1686 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]), 1687 (unsigned long) rule->private, 1688 hw_param_interval_c(params, rule->deps[1]), &t); 1689 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1690 } 1691 1692 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params, 1693 struct snd_pcm_hw_rule *rule) 1694 { 1695 unsigned int k; 1696 struct snd_interval *i = hw_param_interval(params, rule->deps[0]); 1697 struct snd_mask m; 1698 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 1699 snd_mask_any(&m); 1700 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { 1701 int bits; 1702 if (! snd_mask_test(mask, k)) 1703 continue; 1704 bits = snd_pcm_format_physical_width(k); 1705 if (bits <= 0) 1706 continue; /* ignore invalid formats */ 1707 if ((unsigned)bits < i->min || (unsigned)bits > i->max) 1708 snd_mask_reset(&m, k); 1709 } 1710 return snd_mask_refine(mask, &m); 1711 } 1712 1713 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params, 1714 struct snd_pcm_hw_rule *rule) 1715 { 1716 struct snd_interval t; 1717 unsigned int k; 1718 t.min = UINT_MAX; 1719 t.max = 0; 1720 t.openmin = 0; 1721 t.openmax = 0; 1722 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { 1723 int bits; 1724 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k)) 1725 continue; 1726 bits = snd_pcm_format_physical_width(k); 1727 if (bits <= 0) 1728 continue; /* ignore invalid formats */ 1729 if (t.min > (unsigned)bits) 1730 t.min = bits; 1731 if (t.max < (unsigned)bits) 1732 t.max = bits; 1733 } 1734 t.integer = 1; 1735 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1736 } 1737 1738 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12 1739 #error "Change this table" 1740 #endif 1741 1742 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100, 1743 48000, 64000, 88200, 96000, 176400, 192000 }; 1744 1745 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = { 1746 .count = ARRAY_SIZE(rates), 1747 .list = rates, 1748 }; 1749 1750 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params, 1751 struct snd_pcm_hw_rule *rule) 1752 { 1753 struct snd_pcm_hardware *hw = rule->private; 1754 return snd_interval_list(hw_param_interval(params, rule->var), 1755 snd_pcm_known_rates.count, 1756 snd_pcm_known_rates.list, hw->rates); 1757 } 1758 1759 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params, 1760 struct snd_pcm_hw_rule *rule) 1761 { 1762 struct snd_interval t; 1763 struct snd_pcm_substream *substream = rule->private; 1764 t.min = 0; 1765 t.max = substream->buffer_bytes_max; 1766 t.openmin = 0; 1767 t.openmax = 0; 1768 t.integer = 1; 1769 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1770 } 1771 1772 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream) 1773 { 1774 struct snd_pcm_runtime *runtime = substream->runtime; 1775 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; 1776 int k, err; 1777 1778 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { 1779 snd_mask_any(constrs_mask(constrs, k)); 1780 } 1781 1782 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { 1783 snd_interval_any(constrs_interval(constrs, k)); 1784 } 1785 1786 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS)); 1787 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)); 1788 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)); 1789 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)); 1790 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS)); 1791 1792 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, 1793 snd_pcm_hw_rule_format, NULL, 1794 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1795 if (err < 0) 1796 return err; 1797 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 1798 snd_pcm_hw_rule_sample_bits, NULL, 1799 SNDRV_PCM_HW_PARAM_FORMAT, 1800 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1801 if (err < 0) 1802 return err; 1803 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 1804 snd_pcm_hw_rule_div, NULL, 1805 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); 1806 if (err < 0) 1807 return err; 1808 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1809 snd_pcm_hw_rule_mul, NULL, 1810 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); 1811 if (err < 0) 1812 return err; 1813 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1814 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1815 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 1816 if (err < 0) 1817 return err; 1818 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1819 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1820 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1); 1821 if (err < 0) 1822 return err; 1823 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 1824 snd_pcm_hw_rule_div, NULL, 1825 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1826 if (err < 0) 1827 return err; 1828 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1829 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1830 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1); 1831 if (err < 0) 1832 return err; 1833 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1834 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1835 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1); 1836 if (err < 0) 1837 return err; 1838 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, 1839 snd_pcm_hw_rule_div, NULL, 1840 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 1841 if (err < 0) 1842 return err; 1843 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1844 snd_pcm_hw_rule_div, NULL, 1845 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); 1846 if (err < 0) 1847 return err; 1848 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1849 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1850 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1851 if (err < 0) 1852 return err; 1853 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1854 snd_pcm_hw_rule_muldivk, (void*) 1000000, 1855 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); 1856 if (err < 0) 1857 return err; 1858 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1859 snd_pcm_hw_rule_mul, NULL, 1860 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); 1861 if (err < 0) 1862 return err; 1863 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1864 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1865 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1866 if (err < 0) 1867 return err; 1868 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1869 snd_pcm_hw_rule_muldivk, (void*) 1000000, 1870 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); 1871 if (err < 0) 1872 return err; 1873 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 1874 snd_pcm_hw_rule_muldivk, (void*) 8, 1875 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1876 if (err < 0) 1877 return err; 1878 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1879 snd_pcm_hw_rule_muldivk, (void*) 8, 1880 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1881 if (err < 0) 1882 return err; 1883 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 1884 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1885 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); 1886 if (err < 0) 1887 return err; 1888 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME, 1889 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1890 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); 1891 if (err < 0) 1892 return err; 1893 return 0; 1894 } 1895 1896 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream) 1897 { 1898 struct snd_pcm_runtime *runtime = substream->runtime; 1899 struct snd_pcm_hardware *hw = &runtime->hw; 1900 int err; 1901 unsigned int mask = 0; 1902 1903 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) 1904 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED; 1905 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) 1906 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED; 1907 if (hw->info & SNDRV_PCM_INFO_MMAP) { 1908 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) 1909 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; 1910 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) 1911 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED; 1912 if (hw->info & SNDRV_PCM_INFO_COMPLEX) 1913 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX; 1914 } 1915 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask); 1916 if (err < 0) 1917 return err; 1918 1919 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats); 1920 if (err < 0) 1921 return err; 1922 1923 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD); 1924 if (err < 0) 1925 return err; 1926 1927 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, 1928 hw->channels_min, hw->channels_max); 1929 if (err < 0) 1930 return err; 1931 1932 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE, 1933 hw->rate_min, hw->rate_max); 1934 if (err < 0) 1935 return err; 1936 1937 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 1938 hw->period_bytes_min, hw->period_bytes_max); 1939 if (err < 0) 1940 return err; 1941 1942 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS, 1943 hw->periods_min, hw->periods_max); 1944 if (err < 0) 1945 return err; 1946 1947 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1948 hw->period_bytes_min, hw->buffer_bytes_max); 1949 if (err < 0) 1950 return err; 1951 1952 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1953 snd_pcm_hw_rule_buffer_bytes_max, substream, 1954 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1); 1955 if (err < 0) 1956 return err; 1957 1958 /* FIXME: remove */ 1959 if (runtime->dma_bytes) { 1960 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes); 1961 if (err < 0) 1962 return -EINVAL; 1963 } 1964 1965 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) { 1966 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1967 snd_pcm_hw_rule_rate, hw, 1968 SNDRV_PCM_HW_PARAM_RATE, -1); 1969 if (err < 0) 1970 return err; 1971 } 1972 1973 /* FIXME: this belong to lowlevel */ 1974 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE); 1975 1976 return 0; 1977 } 1978 1979 static void pcm_release_private(struct snd_pcm_substream *substream) 1980 { 1981 snd_pcm_unlink(substream); 1982 } 1983 1984 void snd_pcm_release_substream(struct snd_pcm_substream *substream) 1985 { 1986 substream->ref_count--; 1987 if (substream->ref_count > 0) 1988 return; 1989 1990 snd_pcm_drop(substream); 1991 if (substream->hw_opened) { 1992 if (substream->ops->hw_free != NULL) 1993 substream->ops->hw_free(substream); 1994 substream->ops->close(substream); 1995 substream->hw_opened = 0; 1996 } 1997 if (pm_qos_request_active(&substream->latency_pm_qos_req)) 1998 pm_qos_remove_request(&substream->latency_pm_qos_req); 1999 if (substream->pcm_release) { 2000 substream->pcm_release(substream); 2001 substream->pcm_release = NULL; 2002 } 2003 snd_pcm_detach_substream(substream); 2004 } 2005 2006 EXPORT_SYMBOL(snd_pcm_release_substream); 2007 2008 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, 2009 struct file *file, 2010 struct snd_pcm_substream **rsubstream) 2011 { 2012 struct snd_pcm_substream *substream; 2013 int err; 2014 2015 err = snd_pcm_attach_substream(pcm, stream, file, &substream); 2016 if (err < 0) 2017 return err; 2018 if (substream->ref_count > 1) { 2019 *rsubstream = substream; 2020 return 0; 2021 } 2022 2023 err = snd_pcm_hw_constraints_init(substream); 2024 if (err < 0) { 2025 snd_printd("snd_pcm_hw_constraints_init failed\n"); 2026 goto error; 2027 } 2028 2029 if ((err = substream->ops->open(substream)) < 0) 2030 goto error; 2031 2032 substream->hw_opened = 1; 2033 2034 err = snd_pcm_hw_constraints_complete(substream); 2035 if (err < 0) { 2036 snd_printd("snd_pcm_hw_constraints_complete failed\n"); 2037 goto error; 2038 } 2039 2040 *rsubstream = substream; 2041 return 0; 2042 2043 error: 2044 snd_pcm_release_substream(substream); 2045 return err; 2046 } 2047 2048 EXPORT_SYMBOL(snd_pcm_open_substream); 2049 2050 static int snd_pcm_open_file(struct file *file, 2051 struct snd_pcm *pcm, 2052 int stream, 2053 struct snd_pcm_file **rpcm_file) 2054 { 2055 struct snd_pcm_file *pcm_file; 2056 struct snd_pcm_substream *substream; 2057 struct snd_pcm_str *str; 2058 int err; 2059 2060 if (rpcm_file) 2061 *rpcm_file = NULL; 2062 2063 err = snd_pcm_open_substream(pcm, stream, file, &substream); 2064 if (err < 0) 2065 return err; 2066 2067 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL); 2068 if (pcm_file == NULL) { 2069 snd_pcm_release_substream(substream); 2070 return -ENOMEM; 2071 } 2072 pcm_file->substream = substream; 2073 if (substream->ref_count == 1) { 2074 str = substream->pstr; 2075 substream->file = pcm_file; 2076 substream->pcm_release = pcm_release_private; 2077 } 2078 file->private_data = pcm_file; 2079 if (rpcm_file) 2080 *rpcm_file = pcm_file; 2081 return 0; 2082 } 2083 2084 static int snd_pcm_playback_open(struct inode *inode, struct file *file) 2085 { 2086 struct snd_pcm *pcm; 2087 int err = nonseekable_open(inode, file); 2088 if (err < 0) 2089 return err; 2090 pcm = snd_lookup_minor_data(iminor(inode), 2091 SNDRV_DEVICE_TYPE_PCM_PLAYBACK); 2092 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK); 2093 } 2094 2095 static int snd_pcm_capture_open(struct inode *inode, struct file *file) 2096 { 2097 struct snd_pcm *pcm; 2098 int err = nonseekable_open(inode, file); 2099 if (err < 0) 2100 return err; 2101 pcm = snd_lookup_minor_data(iminor(inode), 2102 SNDRV_DEVICE_TYPE_PCM_CAPTURE); 2103 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE); 2104 } 2105 2106 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream) 2107 { 2108 int err; 2109 struct snd_pcm_file *pcm_file; 2110 wait_queue_t wait; 2111 2112 if (pcm == NULL) { 2113 err = -ENODEV; 2114 goto __error1; 2115 } 2116 err = snd_card_file_add(pcm->card, file); 2117 if (err < 0) 2118 goto __error1; 2119 if (!try_module_get(pcm->card->module)) { 2120 err = -EFAULT; 2121 goto __error2; 2122 } 2123 init_waitqueue_entry(&wait, current); 2124 add_wait_queue(&pcm->open_wait, &wait); 2125 mutex_lock(&pcm->open_mutex); 2126 while (1) { 2127 err = snd_pcm_open_file(file, pcm, stream, &pcm_file); 2128 if (err >= 0) 2129 break; 2130 if (err == -EAGAIN) { 2131 if (file->f_flags & O_NONBLOCK) { 2132 err = -EBUSY; 2133 break; 2134 } 2135 } else 2136 break; 2137 set_current_state(TASK_INTERRUPTIBLE); 2138 mutex_unlock(&pcm->open_mutex); 2139 schedule(); 2140 mutex_lock(&pcm->open_mutex); 2141 if (signal_pending(current)) { 2142 err = -ERESTARTSYS; 2143 break; 2144 } 2145 } 2146 remove_wait_queue(&pcm->open_wait, &wait); 2147 mutex_unlock(&pcm->open_mutex); 2148 if (err < 0) 2149 goto __error; 2150 return err; 2151 2152 __error: 2153 module_put(pcm->card->module); 2154 __error2: 2155 snd_card_file_remove(pcm->card, file); 2156 __error1: 2157 return err; 2158 } 2159 2160 static int snd_pcm_release(struct inode *inode, struct file *file) 2161 { 2162 struct snd_pcm *pcm; 2163 struct snd_pcm_substream *substream; 2164 struct snd_pcm_file *pcm_file; 2165 2166 pcm_file = file->private_data; 2167 substream = pcm_file->substream; 2168 if (snd_BUG_ON(!substream)) 2169 return -ENXIO; 2170 pcm = substream->pcm; 2171 mutex_lock(&pcm->open_mutex); 2172 snd_pcm_release_substream(substream); 2173 kfree(pcm_file); 2174 mutex_unlock(&pcm->open_mutex); 2175 wake_up(&pcm->open_wait); 2176 module_put(pcm->card->module); 2177 snd_card_file_remove(pcm->card, file); 2178 return 0; 2179 } 2180 2181 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream, 2182 snd_pcm_uframes_t frames) 2183 { 2184 struct snd_pcm_runtime *runtime = substream->runtime; 2185 snd_pcm_sframes_t appl_ptr; 2186 snd_pcm_sframes_t ret; 2187 snd_pcm_sframes_t hw_avail; 2188 2189 if (frames == 0) 2190 return 0; 2191 2192 snd_pcm_stream_lock_irq(substream); 2193 switch (runtime->status->state) { 2194 case SNDRV_PCM_STATE_PREPARED: 2195 break; 2196 case SNDRV_PCM_STATE_DRAINING: 2197 case SNDRV_PCM_STATE_RUNNING: 2198 if (snd_pcm_update_hw_ptr(substream) >= 0) 2199 break; 2200 /* Fall through */ 2201 case SNDRV_PCM_STATE_XRUN: 2202 ret = -EPIPE; 2203 goto __end; 2204 case SNDRV_PCM_STATE_SUSPENDED: 2205 ret = -ESTRPIPE; 2206 goto __end; 2207 default: 2208 ret = -EBADFD; 2209 goto __end; 2210 } 2211 2212 hw_avail = snd_pcm_playback_hw_avail(runtime); 2213 if (hw_avail <= 0) { 2214 ret = 0; 2215 goto __end; 2216 } 2217 if (frames > (snd_pcm_uframes_t)hw_avail) 2218 frames = hw_avail; 2219 appl_ptr = runtime->control->appl_ptr - frames; 2220 if (appl_ptr < 0) 2221 appl_ptr += runtime->boundary; 2222 runtime->control->appl_ptr = appl_ptr; 2223 ret = frames; 2224 __end: 2225 snd_pcm_stream_unlock_irq(substream); 2226 return ret; 2227 } 2228 2229 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream, 2230 snd_pcm_uframes_t frames) 2231 { 2232 struct snd_pcm_runtime *runtime = substream->runtime; 2233 snd_pcm_sframes_t appl_ptr; 2234 snd_pcm_sframes_t ret; 2235 snd_pcm_sframes_t hw_avail; 2236 2237 if (frames == 0) 2238 return 0; 2239 2240 snd_pcm_stream_lock_irq(substream); 2241 switch (runtime->status->state) { 2242 case SNDRV_PCM_STATE_PREPARED: 2243 case SNDRV_PCM_STATE_DRAINING: 2244 break; 2245 case SNDRV_PCM_STATE_RUNNING: 2246 if (snd_pcm_update_hw_ptr(substream) >= 0) 2247 break; 2248 /* Fall through */ 2249 case SNDRV_PCM_STATE_XRUN: 2250 ret = -EPIPE; 2251 goto __end; 2252 case SNDRV_PCM_STATE_SUSPENDED: 2253 ret = -ESTRPIPE; 2254 goto __end; 2255 default: 2256 ret = -EBADFD; 2257 goto __end; 2258 } 2259 2260 hw_avail = snd_pcm_capture_hw_avail(runtime); 2261 if (hw_avail <= 0) { 2262 ret = 0; 2263 goto __end; 2264 } 2265 if (frames > (snd_pcm_uframes_t)hw_avail) 2266 frames = hw_avail; 2267 appl_ptr = runtime->control->appl_ptr - frames; 2268 if (appl_ptr < 0) 2269 appl_ptr += runtime->boundary; 2270 runtime->control->appl_ptr = appl_ptr; 2271 ret = frames; 2272 __end: 2273 snd_pcm_stream_unlock_irq(substream); 2274 return ret; 2275 } 2276 2277 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream, 2278 snd_pcm_uframes_t frames) 2279 { 2280 struct snd_pcm_runtime *runtime = substream->runtime; 2281 snd_pcm_sframes_t appl_ptr; 2282 snd_pcm_sframes_t ret; 2283 snd_pcm_sframes_t avail; 2284 2285 if (frames == 0) 2286 return 0; 2287 2288 snd_pcm_stream_lock_irq(substream); 2289 switch (runtime->status->state) { 2290 case SNDRV_PCM_STATE_PREPARED: 2291 case SNDRV_PCM_STATE_PAUSED: 2292 break; 2293 case SNDRV_PCM_STATE_DRAINING: 2294 case SNDRV_PCM_STATE_RUNNING: 2295 if (snd_pcm_update_hw_ptr(substream) >= 0) 2296 break; 2297 /* Fall through */ 2298 case SNDRV_PCM_STATE_XRUN: 2299 ret = -EPIPE; 2300 goto __end; 2301 case SNDRV_PCM_STATE_SUSPENDED: 2302 ret = -ESTRPIPE; 2303 goto __end; 2304 default: 2305 ret = -EBADFD; 2306 goto __end; 2307 } 2308 2309 avail = snd_pcm_playback_avail(runtime); 2310 if (avail <= 0) { 2311 ret = 0; 2312 goto __end; 2313 } 2314 if (frames > (snd_pcm_uframes_t)avail) 2315 frames = avail; 2316 appl_ptr = runtime->control->appl_ptr + frames; 2317 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) 2318 appl_ptr -= runtime->boundary; 2319 runtime->control->appl_ptr = appl_ptr; 2320 ret = frames; 2321 __end: 2322 snd_pcm_stream_unlock_irq(substream); 2323 return ret; 2324 } 2325 2326 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream, 2327 snd_pcm_uframes_t frames) 2328 { 2329 struct snd_pcm_runtime *runtime = substream->runtime; 2330 snd_pcm_sframes_t appl_ptr; 2331 snd_pcm_sframes_t ret; 2332 snd_pcm_sframes_t avail; 2333 2334 if (frames == 0) 2335 return 0; 2336 2337 snd_pcm_stream_lock_irq(substream); 2338 switch (runtime->status->state) { 2339 case SNDRV_PCM_STATE_PREPARED: 2340 case SNDRV_PCM_STATE_DRAINING: 2341 case SNDRV_PCM_STATE_PAUSED: 2342 break; 2343 case SNDRV_PCM_STATE_RUNNING: 2344 if (snd_pcm_update_hw_ptr(substream) >= 0) 2345 break; 2346 /* Fall through */ 2347 case SNDRV_PCM_STATE_XRUN: 2348 ret = -EPIPE; 2349 goto __end; 2350 case SNDRV_PCM_STATE_SUSPENDED: 2351 ret = -ESTRPIPE; 2352 goto __end; 2353 default: 2354 ret = -EBADFD; 2355 goto __end; 2356 } 2357 2358 avail = snd_pcm_capture_avail(runtime); 2359 if (avail <= 0) { 2360 ret = 0; 2361 goto __end; 2362 } 2363 if (frames > (snd_pcm_uframes_t)avail) 2364 frames = avail; 2365 appl_ptr = runtime->control->appl_ptr + frames; 2366 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) 2367 appl_ptr -= runtime->boundary; 2368 runtime->control->appl_ptr = appl_ptr; 2369 ret = frames; 2370 __end: 2371 snd_pcm_stream_unlock_irq(substream); 2372 return ret; 2373 } 2374 2375 static int snd_pcm_hwsync(struct snd_pcm_substream *substream) 2376 { 2377 struct snd_pcm_runtime *runtime = substream->runtime; 2378 int err; 2379 2380 snd_pcm_stream_lock_irq(substream); 2381 switch (runtime->status->state) { 2382 case SNDRV_PCM_STATE_DRAINING: 2383 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 2384 goto __badfd; 2385 case SNDRV_PCM_STATE_RUNNING: 2386 if ((err = snd_pcm_update_hw_ptr(substream)) < 0) 2387 break; 2388 /* Fall through */ 2389 case SNDRV_PCM_STATE_PREPARED: 2390 case SNDRV_PCM_STATE_SUSPENDED: 2391 err = 0; 2392 break; 2393 case SNDRV_PCM_STATE_XRUN: 2394 err = -EPIPE; 2395 break; 2396 default: 2397 __badfd: 2398 err = -EBADFD; 2399 break; 2400 } 2401 snd_pcm_stream_unlock_irq(substream); 2402 return err; 2403 } 2404 2405 static int snd_pcm_delay(struct snd_pcm_substream *substream, 2406 snd_pcm_sframes_t __user *res) 2407 { 2408 struct snd_pcm_runtime *runtime = substream->runtime; 2409 int err; 2410 snd_pcm_sframes_t n = 0; 2411 2412 snd_pcm_stream_lock_irq(substream); 2413 switch (runtime->status->state) { 2414 case SNDRV_PCM_STATE_DRAINING: 2415 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 2416 goto __badfd; 2417 case SNDRV_PCM_STATE_RUNNING: 2418 if ((err = snd_pcm_update_hw_ptr(substream)) < 0) 2419 break; 2420 /* Fall through */ 2421 case SNDRV_PCM_STATE_PREPARED: 2422 case SNDRV_PCM_STATE_SUSPENDED: 2423 err = 0; 2424 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2425 n = snd_pcm_playback_hw_avail(runtime); 2426 else 2427 n = snd_pcm_capture_avail(runtime); 2428 n += runtime->delay; 2429 break; 2430 case SNDRV_PCM_STATE_XRUN: 2431 err = -EPIPE; 2432 break; 2433 default: 2434 __badfd: 2435 err = -EBADFD; 2436 break; 2437 } 2438 snd_pcm_stream_unlock_irq(substream); 2439 if (!err) 2440 if (put_user(n, res)) 2441 err = -EFAULT; 2442 return err; 2443 } 2444 2445 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream, 2446 struct snd_pcm_sync_ptr __user *_sync_ptr) 2447 { 2448 struct snd_pcm_runtime *runtime = substream->runtime; 2449 struct snd_pcm_sync_ptr sync_ptr; 2450 volatile struct snd_pcm_mmap_status *status; 2451 volatile struct snd_pcm_mmap_control *control; 2452 int err; 2453 2454 memset(&sync_ptr, 0, sizeof(sync_ptr)); 2455 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags))) 2456 return -EFAULT; 2457 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control))) 2458 return -EFAULT; 2459 status = runtime->status; 2460 control = runtime->control; 2461 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) { 2462 err = snd_pcm_hwsync(substream); 2463 if (err < 0) 2464 return err; 2465 } 2466 snd_pcm_stream_lock_irq(substream); 2467 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) 2468 control->appl_ptr = sync_ptr.c.control.appl_ptr; 2469 else 2470 sync_ptr.c.control.appl_ptr = control->appl_ptr; 2471 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) 2472 control->avail_min = sync_ptr.c.control.avail_min; 2473 else 2474 sync_ptr.c.control.avail_min = control->avail_min; 2475 sync_ptr.s.status.state = status->state; 2476 sync_ptr.s.status.hw_ptr = status->hw_ptr; 2477 sync_ptr.s.status.tstamp = status->tstamp; 2478 sync_ptr.s.status.suspended_state = status->suspended_state; 2479 snd_pcm_stream_unlock_irq(substream); 2480 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr))) 2481 return -EFAULT; 2482 return 0; 2483 } 2484 2485 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg) 2486 { 2487 struct snd_pcm_runtime *runtime = substream->runtime; 2488 int arg; 2489 2490 if (get_user(arg, _arg)) 2491 return -EFAULT; 2492 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST) 2493 return -EINVAL; 2494 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY; 2495 if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC) 2496 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC; 2497 return 0; 2498 } 2499 2500 static int snd_pcm_common_ioctl1(struct file *file, 2501 struct snd_pcm_substream *substream, 2502 unsigned int cmd, void __user *arg) 2503 { 2504 switch (cmd) { 2505 case SNDRV_PCM_IOCTL_PVERSION: 2506 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0; 2507 case SNDRV_PCM_IOCTL_INFO: 2508 return snd_pcm_info_user(substream, arg); 2509 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */ 2510 return 0; 2511 case SNDRV_PCM_IOCTL_TTSTAMP: 2512 return snd_pcm_tstamp(substream, arg); 2513 case SNDRV_PCM_IOCTL_HW_REFINE: 2514 return snd_pcm_hw_refine_user(substream, arg); 2515 case SNDRV_PCM_IOCTL_HW_PARAMS: 2516 return snd_pcm_hw_params_user(substream, arg); 2517 case SNDRV_PCM_IOCTL_HW_FREE: 2518 return snd_pcm_hw_free(substream); 2519 case SNDRV_PCM_IOCTL_SW_PARAMS: 2520 return snd_pcm_sw_params_user(substream, arg); 2521 case SNDRV_PCM_IOCTL_STATUS: 2522 return snd_pcm_status_user(substream, arg); 2523 case SNDRV_PCM_IOCTL_CHANNEL_INFO: 2524 return snd_pcm_channel_info_user(substream, arg); 2525 case SNDRV_PCM_IOCTL_PREPARE: 2526 return snd_pcm_prepare(substream, file); 2527 case SNDRV_PCM_IOCTL_RESET: 2528 return snd_pcm_reset(substream); 2529 case SNDRV_PCM_IOCTL_START: 2530 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING); 2531 case SNDRV_PCM_IOCTL_LINK: 2532 return snd_pcm_link(substream, (int)(unsigned long) arg); 2533 case SNDRV_PCM_IOCTL_UNLINK: 2534 return snd_pcm_unlink(substream); 2535 case SNDRV_PCM_IOCTL_RESUME: 2536 return snd_pcm_resume(substream); 2537 case SNDRV_PCM_IOCTL_XRUN: 2538 return snd_pcm_xrun(substream); 2539 case SNDRV_PCM_IOCTL_HWSYNC: 2540 return snd_pcm_hwsync(substream); 2541 case SNDRV_PCM_IOCTL_DELAY: 2542 return snd_pcm_delay(substream, arg); 2543 case SNDRV_PCM_IOCTL_SYNC_PTR: 2544 return snd_pcm_sync_ptr(substream, arg); 2545 #ifdef CONFIG_SND_SUPPORT_OLD_API 2546 case SNDRV_PCM_IOCTL_HW_REFINE_OLD: 2547 return snd_pcm_hw_refine_old_user(substream, arg); 2548 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD: 2549 return snd_pcm_hw_params_old_user(substream, arg); 2550 #endif 2551 case SNDRV_PCM_IOCTL_DRAIN: 2552 return snd_pcm_drain(substream, file); 2553 case SNDRV_PCM_IOCTL_DROP: 2554 return snd_pcm_drop(substream); 2555 case SNDRV_PCM_IOCTL_PAUSE: 2556 { 2557 int res; 2558 snd_pcm_stream_lock_irq(substream); 2559 res = snd_pcm_pause(substream, (int)(unsigned long)arg); 2560 snd_pcm_stream_unlock_irq(substream); 2561 return res; 2562 } 2563 } 2564 snd_printd("unknown ioctl = 0x%x\n", cmd); 2565 return -ENOTTY; 2566 } 2567 2568 static int snd_pcm_playback_ioctl1(struct file *file, 2569 struct snd_pcm_substream *substream, 2570 unsigned int cmd, void __user *arg) 2571 { 2572 if (snd_BUG_ON(!substream)) 2573 return -ENXIO; 2574 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) 2575 return -EINVAL; 2576 switch (cmd) { 2577 case SNDRV_PCM_IOCTL_WRITEI_FRAMES: 2578 { 2579 struct snd_xferi xferi; 2580 struct snd_xferi __user *_xferi = arg; 2581 struct snd_pcm_runtime *runtime = substream->runtime; 2582 snd_pcm_sframes_t result; 2583 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2584 return -EBADFD; 2585 if (put_user(0, &_xferi->result)) 2586 return -EFAULT; 2587 if (copy_from_user(&xferi, _xferi, sizeof(xferi))) 2588 return -EFAULT; 2589 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames); 2590 __put_user(result, &_xferi->result); 2591 return result < 0 ? result : 0; 2592 } 2593 case SNDRV_PCM_IOCTL_WRITEN_FRAMES: 2594 { 2595 struct snd_xfern xfern; 2596 struct snd_xfern __user *_xfern = arg; 2597 struct snd_pcm_runtime *runtime = substream->runtime; 2598 void __user **bufs; 2599 snd_pcm_sframes_t result; 2600 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2601 return -EBADFD; 2602 if (runtime->channels > 128) 2603 return -EINVAL; 2604 if (put_user(0, &_xfern->result)) 2605 return -EFAULT; 2606 if (copy_from_user(&xfern, _xfern, sizeof(xfern))) 2607 return -EFAULT; 2608 2609 bufs = memdup_user(xfern.bufs, 2610 sizeof(void *) * runtime->channels); 2611 if (IS_ERR(bufs)) 2612 return PTR_ERR(bufs); 2613 result = snd_pcm_lib_writev(substream, bufs, xfern.frames); 2614 kfree(bufs); 2615 __put_user(result, &_xfern->result); 2616 return result < 0 ? result : 0; 2617 } 2618 case SNDRV_PCM_IOCTL_REWIND: 2619 { 2620 snd_pcm_uframes_t frames; 2621 snd_pcm_uframes_t __user *_frames = arg; 2622 snd_pcm_sframes_t result; 2623 if (get_user(frames, _frames)) 2624 return -EFAULT; 2625 if (put_user(0, _frames)) 2626 return -EFAULT; 2627 result = snd_pcm_playback_rewind(substream, frames); 2628 __put_user(result, _frames); 2629 return result < 0 ? result : 0; 2630 } 2631 case SNDRV_PCM_IOCTL_FORWARD: 2632 { 2633 snd_pcm_uframes_t frames; 2634 snd_pcm_uframes_t __user *_frames = arg; 2635 snd_pcm_sframes_t result; 2636 if (get_user(frames, _frames)) 2637 return -EFAULT; 2638 if (put_user(0, _frames)) 2639 return -EFAULT; 2640 result = snd_pcm_playback_forward(substream, frames); 2641 __put_user(result, _frames); 2642 return result < 0 ? result : 0; 2643 } 2644 } 2645 return snd_pcm_common_ioctl1(file, substream, cmd, arg); 2646 } 2647 2648 static int snd_pcm_capture_ioctl1(struct file *file, 2649 struct snd_pcm_substream *substream, 2650 unsigned int cmd, void __user *arg) 2651 { 2652 if (snd_BUG_ON(!substream)) 2653 return -ENXIO; 2654 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE)) 2655 return -EINVAL; 2656 switch (cmd) { 2657 case SNDRV_PCM_IOCTL_READI_FRAMES: 2658 { 2659 struct snd_xferi xferi; 2660 struct snd_xferi __user *_xferi = arg; 2661 struct snd_pcm_runtime *runtime = substream->runtime; 2662 snd_pcm_sframes_t result; 2663 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2664 return -EBADFD; 2665 if (put_user(0, &_xferi->result)) 2666 return -EFAULT; 2667 if (copy_from_user(&xferi, _xferi, sizeof(xferi))) 2668 return -EFAULT; 2669 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames); 2670 __put_user(result, &_xferi->result); 2671 return result < 0 ? result : 0; 2672 } 2673 case SNDRV_PCM_IOCTL_READN_FRAMES: 2674 { 2675 struct snd_xfern xfern; 2676 struct snd_xfern __user *_xfern = arg; 2677 struct snd_pcm_runtime *runtime = substream->runtime; 2678 void *bufs; 2679 snd_pcm_sframes_t result; 2680 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2681 return -EBADFD; 2682 if (runtime->channels > 128) 2683 return -EINVAL; 2684 if (put_user(0, &_xfern->result)) 2685 return -EFAULT; 2686 if (copy_from_user(&xfern, _xfern, sizeof(xfern))) 2687 return -EFAULT; 2688 2689 bufs = memdup_user(xfern.bufs, 2690 sizeof(void *) * runtime->channels); 2691 if (IS_ERR(bufs)) 2692 return PTR_ERR(bufs); 2693 result = snd_pcm_lib_readv(substream, bufs, xfern.frames); 2694 kfree(bufs); 2695 __put_user(result, &_xfern->result); 2696 return result < 0 ? result : 0; 2697 } 2698 case SNDRV_PCM_IOCTL_REWIND: 2699 { 2700 snd_pcm_uframes_t frames; 2701 snd_pcm_uframes_t __user *_frames = arg; 2702 snd_pcm_sframes_t result; 2703 if (get_user(frames, _frames)) 2704 return -EFAULT; 2705 if (put_user(0, _frames)) 2706 return -EFAULT; 2707 result = snd_pcm_capture_rewind(substream, frames); 2708 __put_user(result, _frames); 2709 return result < 0 ? result : 0; 2710 } 2711 case SNDRV_PCM_IOCTL_FORWARD: 2712 { 2713 snd_pcm_uframes_t frames; 2714 snd_pcm_uframes_t __user *_frames = arg; 2715 snd_pcm_sframes_t result; 2716 if (get_user(frames, _frames)) 2717 return -EFAULT; 2718 if (put_user(0, _frames)) 2719 return -EFAULT; 2720 result = snd_pcm_capture_forward(substream, frames); 2721 __put_user(result, _frames); 2722 return result < 0 ? result : 0; 2723 } 2724 } 2725 return snd_pcm_common_ioctl1(file, substream, cmd, arg); 2726 } 2727 2728 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd, 2729 unsigned long arg) 2730 { 2731 struct snd_pcm_file *pcm_file; 2732 2733 pcm_file = file->private_data; 2734 2735 if (((cmd >> 8) & 0xff) != 'A') 2736 return -ENOTTY; 2737 2738 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd, 2739 (void __user *)arg); 2740 } 2741 2742 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd, 2743 unsigned long arg) 2744 { 2745 struct snd_pcm_file *pcm_file; 2746 2747 pcm_file = file->private_data; 2748 2749 if (((cmd >> 8) & 0xff) != 'A') 2750 return -ENOTTY; 2751 2752 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd, 2753 (void __user *)arg); 2754 } 2755 2756 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, 2757 unsigned int cmd, void *arg) 2758 { 2759 mm_segment_t fs; 2760 int result; 2761 2762 fs = snd_enter_user(); 2763 switch (substream->stream) { 2764 case SNDRV_PCM_STREAM_PLAYBACK: 2765 result = snd_pcm_playback_ioctl1(NULL, substream, cmd, 2766 (void __user *)arg); 2767 break; 2768 case SNDRV_PCM_STREAM_CAPTURE: 2769 result = snd_pcm_capture_ioctl1(NULL, substream, cmd, 2770 (void __user *)arg); 2771 break; 2772 default: 2773 result = -EINVAL; 2774 break; 2775 } 2776 snd_leave_user(fs); 2777 return result; 2778 } 2779 2780 EXPORT_SYMBOL(snd_pcm_kernel_ioctl); 2781 2782 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count, 2783 loff_t * offset) 2784 { 2785 struct snd_pcm_file *pcm_file; 2786 struct snd_pcm_substream *substream; 2787 struct snd_pcm_runtime *runtime; 2788 snd_pcm_sframes_t result; 2789 2790 pcm_file = file->private_data; 2791 substream = pcm_file->substream; 2792 if (PCM_RUNTIME_CHECK(substream)) 2793 return -ENXIO; 2794 runtime = substream->runtime; 2795 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2796 return -EBADFD; 2797 if (!frame_aligned(runtime, count)) 2798 return -EINVAL; 2799 count = bytes_to_frames(runtime, count); 2800 result = snd_pcm_lib_read(substream, buf, count); 2801 if (result > 0) 2802 result = frames_to_bytes(runtime, result); 2803 return result; 2804 } 2805 2806 static ssize_t snd_pcm_write(struct file *file, const char __user *buf, 2807 size_t count, loff_t * offset) 2808 { 2809 struct snd_pcm_file *pcm_file; 2810 struct snd_pcm_substream *substream; 2811 struct snd_pcm_runtime *runtime; 2812 snd_pcm_sframes_t result; 2813 2814 pcm_file = file->private_data; 2815 substream = pcm_file->substream; 2816 if (PCM_RUNTIME_CHECK(substream)) 2817 return -ENXIO; 2818 runtime = substream->runtime; 2819 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2820 return -EBADFD; 2821 if (!frame_aligned(runtime, count)) 2822 return -EINVAL; 2823 count = bytes_to_frames(runtime, count); 2824 result = snd_pcm_lib_write(substream, buf, count); 2825 if (result > 0) 2826 result = frames_to_bytes(runtime, result); 2827 return result; 2828 } 2829 2830 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov, 2831 unsigned long nr_segs, loff_t pos) 2832 2833 { 2834 struct snd_pcm_file *pcm_file; 2835 struct snd_pcm_substream *substream; 2836 struct snd_pcm_runtime *runtime; 2837 snd_pcm_sframes_t result; 2838 unsigned long i; 2839 void __user **bufs; 2840 snd_pcm_uframes_t frames; 2841 2842 pcm_file = iocb->ki_filp->private_data; 2843 substream = pcm_file->substream; 2844 if (PCM_RUNTIME_CHECK(substream)) 2845 return -ENXIO; 2846 runtime = substream->runtime; 2847 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2848 return -EBADFD; 2849 if (nr_segs > 1024 || nr_segs != runtime->channels) 2850 return -EINVAL; 2851 if (!frame_aligned(runtime, iov->iov_len)) 2852 return -EINVAL; 2853 frames = bytes_to_samples(runtime, iov->iov_len); 2854 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL); 2855 if (bufs == NULL) 2856 return -ENOMEM; 2857 for (i = 0; i < nr_segs; ++i) 2858 bufs[i] = iov[i].iov_base; 2859 result = snd_pcm_lib_readv(substream, bufs, frames); 2860 if (result > 0) 2861 result = frames_to_bytes(runtime, result); 2862 kfree(bufs); 2863 return result; 2864 } 2865 2866 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov, 2867 unsigned long nr_segs, loff_t pos) 2868 { 2869 struct snd_pcm_file *pcm_file; 2870 struct snd_pcm_substream *substream; 2871 struct snd_pcm_runtime *runtime; 2872 snd_pcm_sframes_t result; 2873 unsigned long i; 2874 void __user **bufs; 2875 snd_pcm_uframes_t frames; 2876 2877 pcm_file = iocb->ki_filp->private_data; 2878 substream = pcm_file->substream; 2879 if (PCM_RUNTIME_CHECK(substream)) 2880 return -ENXIO; 2881 runtime = substream->runtime; 2882 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2883 return -EBADFD; 2884 if (nr_segs > 128 || nr_segs != runtime->channels || 2885 !frame_aligned(runtime, iov->iov_len)) 2886 return -EINVAL; 2887 frames = bytes_to_samples(runtime, iov->iov_len); 2888 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL); 2889 if (bufs == NULL) 2890 return -ENOMEM; 2891 for (i = 0; i < nr_segs; ++i) 2892 bufs[i] = iov[i].iov_base; 2893 result = snd_pcm_lib_writev(substream, bufs, frames); 2894 if (result > 0) 2895 result = frames_to_bytes(runtime, result); 2896 kfree(bufs); 2897 return result; 2898 } 2899 2900 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait) 2901 { 2902 struct snd_pcm_file *pcm_file; 2903 struct snd_pcm_substream *substream; 2904 struct snd_pcm_runtime *runtime; 2905 unsigned int mask; 2906 snd_pcm_uframes_t avail; 2907 2908 pcm_file = file->private_data; 2909 2910 substream = pcm_file->substream; 2911 if (PCM_RUNTIME_CHECK(substream)) 2912 return -ENXIO; 2913 runtime = substream->runtime; 2914 2915 poll_wait(file, &runtime->sleep, wait); 2916 2917 snd_pcm_stream_lock_irq(substream); 2918 avail = snd_pcm_playback_avail(runtime); 2919 switch (runtime->status->state) { 2920 case SNDRV_PCM_STATE_RUNNING: 2921 case SNDRV_PCM_STATE_PREPARED: 2922 case SNDRV_PCM_STATE_PAUSED: 2923 if (avail >= runtime->control->avail_min) { 2924 mask = POLLOUT | POLLWRNORM; 2925 break; 2926 } 2927 /* Fall through */ 2928 case SNDRV_PCM_STATE_DRAINING: 2929 mask = 0; 2930 break; 2931 default: 2932 mask = POLLOUT | POLLWRNORM | POLLERR; 2933 break; 2934 } 2935 snd_pcm_stream_unlock_irq(substream); 2936 return mask; 2937 } 2938 2939 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait) 2940 { 2941 struct snd_pcm_file *pcm_file; 2942 struct snd_pcm_substream *substream; 2943 struct snd_pcm_runtime *runtime; 2944 unsigned int mask; 2945 snd_pcm_uframes_t avail; 2946 2947 pcm_file = file->private_data; 2948 2949 substream = pcm_file->substream; 2950 if (PCM_RUNTIME_CHECK(substream)) 2951 return -ENXIO; 2952 runtime = substream->runtime; 2953 2954 poll_wait(file, &runtime->sleep, wait); 2955 2956 snd_pcm_stream_lock_irq(substream); 2957 avail = snd_pcm_capture_avail(runtime); 2958 switch (runtime->status->state) { 2959 case SNDRV_PCM_STATE_RUNNING: 2960 case SNDRV_PCM_STATE_PREPARED: 2961 case SNDRV_PCM_STATE_PAUSED: 2962 if (avail >= runtime->control->avail_min) { 2963 mask = POLLIN | POLLRDNORM; 2964 break; 2965 } 2966 mask = 0; 2967 break; 2968 case SNDRV_PCM_STATE_DRAINING: 2969 if (avail > 0) { 2970 mask = POLLIN | POLLRDNORM; 2971 break; 2972 } 2973 /* Fall through */ 2974 default: 2975 mask = POLLIN | POLLRDNORM | POLLERR; 2976 break; 2977 } 2978 snd_pcm_stream_unlock_irq(substream); 2979 return mask; 2980 } 2981 2982 /* 2983 * mmap support 2984 */ 2985 2986 /* 2987 * Only on coherent architectures, we can mmap the status and the control records 2988 * for effcient data transfer. On others, we have to use HWSYNC ioctl... 2989 */ 2990 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) 2991 /* 2992 * mmap status record 2993 */ 2994 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area, 2995 struct vm_fault *vmf) 2996 { 2997 struct snd_pcm_substream *substream = area->vm_private_data; 2998 struct snd_pcm_runtime *runtime; 2999 3000 if (substream == NULL) 3001 return VM_FAULT_SIGBUS; 3002 runtime = substream->runtime; 3003 vmf->page = virt_to_page(runtime->status); 3004 get_page(vmf->page); 3005 return 0; 3006 } 3007 3008 static const struct vm_operations_struct snd_pcm_vm_ops_status = 3009 { 3010 .fault = snd_pcm_mmap_status_fault, 3011 }; 3012 3013 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, 3014 struct vm_area_struct *area) 3015 { 3016 struct snd_pcm_runtime *runtime; 3017 long size; 3018 if (!(area->vm_flags & VM_READ)) 3019 return -EINVAL; 3020 runtime = substream->runtime; 3021 size = area->vm_end - area->vm_start; 3022 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))) 3023 return -EINVAL; 3024 area->vm_ops = &snd_pcm_vm_ops_status; 3025 area->vm_private_data = substream; 3026 area->vm_flags |= VM_RESERVED; 3027 return 0; 3028 } 3029 3030 /* 3031 * mmap control record 3032 */ 3033 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area, 3034 struct vm_fault *vmf) 3035 { 3036 struct snd_pcm_substream *substream = area->vm_private_data; 3037 struct snd_pcm_runtime *runtime; 3038 3039 if (substream == NULL) 3040 return VM_FAULT_SIGBUS; 3041 runtime = substream->runtime; 3042 vmf->page = virt_to_page(runtime->control); 3043 get_page(vmf->page); 3044 return 0; 3045 } 3046 3047 static const struct vm_operations_struct snd_pcm_vm_ops_control = 3048 { 3049 .fault = snd_pcm_mmap_control_fault, 3050 }; 3051 3052 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, 3053 struct vm_area_struct *area) 3054 { 3055 struct snd_pcm_runtime *runtime; 3056 long size; 3057 if (!(area->vm_flags & VM_READ)) 3058 return -EINVAL; 3059 runtime = substream->runtime; 3060 size = area->vm_end - area->vm_start; 3061 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))) 3062 return -EINVAL; 3063 area->vm_ops = &snd_pcm_vm_ops_control; 3064 area->vm_private_data = substream; 3065 area->vm_flags |= VM_RESERVED; 3066 return 0; 3067 } 3068 #else /* ! coherent mmap */ 3069 /* 3070 * don't support mmap for status and control records. 3071 */ 3072 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, 3073 struct vm_area_struct *area) 3074 { 3075 return -ENXIO; 3076 } 3077 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, 3078 struct vm_area_struct *area) 3079 { 3080 return -ENXIO; 3081 } 3082 #endif /* coherent mmap */ 3083 3084 static inline struct page * 3085 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs) 3086 { 3087 void *vaddr = substream->runtime->dma_area + ofs; 3088 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT) 3089 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) 3090 return virt_to_page(CAC_ADDR(vaddr)); 3091 #endif 3092 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE) 3093 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) { 3094 dma_addr_t addr = substream->runtime->dma_addr + ofs; 3095 addr -= get_dma_offset(substream->dma_buffer.dev.dev); 3096 /* assume dma_handle set via pfn_to_phys() in 3097 * mm/dma-noncoherent.c 3098 */ 3099 return pfn_to_page(addr >> PAGE_SHIFT); 3100 } 3101 #endif 3102 return virt_to_page(vaddr); 3103 } 3104 3105 /* 3106 * fault callback for mmapping a RAM page 3107 */ 3108 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area, 3109 struct vm_fault *vmf) 3110 { 3111 struct snd_pcm_substream *substream = area->vm_private_data; 3112 struct snd_pcm_runtime *runtime; 3113 unsigned long offset; 3114 struct page * page; 3115 size_t dma_bytes; 3116 3117 if (substream == NULL) 3118 return VM_FAULT_SIGBUS; 3119 runtime = substream->runtime; 3120 offset = vmf->pgoff << PAGE_SHIFT; 3121 dma_bytes = PAGE_ALIGN(runtime->dma_bytes); 3122 if (offset > dma_bytes - PAGE_SIZE) 3123 return VM_FAULT_SIGBUS; 3124 if (substream->ops->page) 3125 page = substream->ops->page(substream, offset); 3126 else 3127 page = snd_pcm_default_page_ops(substream, offset); 3128 if (!page) 3129 return VM_FAULT_SIGBUS; 3130 get_page(page); 3131 vmf->page = page; 3132 return 0; 3133 } 3134 3135 static const struct vm_operations_struct snd_pcm_vm_ops_data = { 3136 .open = snd_pcm_mmap_data_open, 3137 .close = snd_pcm_mmap_data_close, 3138 }; 3139 3140 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = { 3141 .open = snd_pcm_mmap_data_open, 3142 .close = snd_pcm_mmap_data_close, 3143 .fault = snd_pcm_mmap_data_fault, 3144 }; 3145 3146 #ifndef ARCH_HAS_DMA_MMAP_COHERENT 3147 /* This should be defined / handled globally! */ 3148 #ifdef CONFIG_ARM 3149 #define ARCH_HAS_DMA_MMAP_COHERENT 3150 #endif 3151 #endif 3152 3153 /* 3154 * mmap the DMA buffer on RAM 3155 */ 3156 static int snd_pcm_default_mmap(struct snd_pcm_substream *substream, 3157 struct vm_area_struct *area) 3158 { 3159 area->vm_flags |= VM_RESERVED; 3160 #ifdef ARCH_HAS_DMA_MMAP_COHERENT 3161 if (!substream->ops->page && 3162 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) 3163 return dma_mmap_coherent(substream->dma_buffer.dev.dev, 3164 area, 3165 substream->runtime->dma_area, 3166 substream->runtime->dma_addr, 3167 area->vm_end - area->vm_start); 3168 #elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT) 3169 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV && 3170 !plat_device_is_coherent(substream->dma_buffer.dev.dev)) 3171 area->vm_page_prot = pgprot_noncached(area->vm_page_prot); 3172 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */ 3173 /* mmap with fault handler */ 3174 area->vm_ops = &snd_pcm_vm_ops_data_fault; 3175 return 0; 3176 } 3177 3178 /* 3179 * mmap the DMA buffer on I/O memory area 3180 */ 3181 #if SNDRV_PCM_INFO_MMAP_IOMEM 3182 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, 3183 struct vm_area_struct *area) 3184 { 3185 long size; 3186 unsigned long offset; 3187 3188 area->vm_page_prot = pgprot_noncached(area->vm_page_prot); 3189 area->vm_flags |= VM_IO; 3190 size = area->vm_end - area->vm_start; 3191 offset = area->vm_pgoff << PAGE_SHIFT; 3192 if (io_remap_pfn_range(area, area->vm_start, 3193 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT, 3194 size, area->vm_page_prot)) 3195 return -EAGAIN; 3196 return 0; 3197 } 3198 3199 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem); 3200 #endif /* SNDRV_PCM_INFO_MMAP */ 3201 3202 /* mmap callback with pgprot_noncached */ 3203 int snd_pcm_lib_mmap_noncached(struct snd_pcm_substream *substream, 3204 struct vm_area_struct *area) 3205 { 3206 area->vm_page_prot = pgprot_noncached(area->vm_page_prot); 3207 return snd_pcm_default_mmap(substream, area); 3208 } 3209 EXPORT_SYMBOL(snd_pcm_lib_mmap_noncached); 3210 3211 /* 3212 * mmap DMA buffer 3213 */ 3214 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, 3215 struct vm_area_struct *area) 3216 { 3217 struct snd_pcm_runtime *runtime; 3218 long size; 3219 unsigned long offset; 3220 size_t dma_bytes; 3221 int err; 3222 3223 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 3224 if (!(area->vm_flags & (VM_WRITE|VM_READ))) 3225 return -EINVAL; 3226 } else { 3227 if (!(area->vm_flags & VM_READ)) 3228 return -EINVAL; 3229 } 3230 runtime = substream->runtime; 3231 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 3232 return -EBADFD; 3233 if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) 3234 return -ENXIO; 3235 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || 3236 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) 3237 return -EINVAL; 3238 size = area->vm_end - area->vm_start; 3239 offset = area->vm_pgoff << PAGE_SHIFT; 3240 dma_bytes = PAGE_ALIGN(runtime->dma_bytes); 3241 if ((size_t)size > dma_bytes) 3242 return -EINVAL; 3243 if (offset > dma_bytes - size) 3244 return -EINVAL; 3245 3246 area->vm_ops = &snd_pcm_vm_ops_data; 3247 area->vm_private_data = substream; 3248 if (substream->ops->mmap) 3249 err = substream->ops->mmap(substream, area); 3250 else 3251 err = snd_pcm_default_mmap(substream, area); 3252 if (!err) 3253 atomic_inc(&substream->mmap_count); 3254 return err; 3255 } 3256 3257 EXPORT_SYMBOL(snd_pcm_mmap_data); 3258 3259 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area) 3260 { 3261 struct snd_pcm_file * pcm_file; 3262 struct snd_pcm_substream *substream; 3263 unsigned long offset; 3264 3265 pcm_file = file->private_data; 3266 substream = pcm_file->substream; 3267 if (PCM_RUNTIME_CHECK(substream)) 3268 return -ENXIO; 3269 3270 offset = area->vm_pgoff << PAGE_SHIFT; 3271 switch (offset) { 3272 case SNDRV_PCM_MMAP_OFFSET_STATUS: 3273 if (pcm_file->no_compat_mmap) 3274 return -ENXIO; 3275 return snd_pcm_mmap_status(substream, file, area); 3276 case SNDRV_PCM_MMAP_OFFSET_CONTROL: 3277 if (pcm_file->no_compat_mmap) 3278 return -ENXIO; 3279 return snd_pcm_mmap_control(substream, file, area); 3280 default: 3281 return snd_pcm_mmap_data(substream, file, area); 3282 } 3283 return 0; 3284 } 3285 3286 static int snd_pcm_fasync(int fd, struct file * file, int on) 3287 { 3288 struct snd_pcm_file * pcm_file; 3289 struct snd_pcm_substream *substream; 3290 struct snd_pcm_runtime *runtime; 3291 3292 pcm_file = file->private_data; 3293 substream = pcm_file->substream; 3294 if (PCM_RUNTIME_CHECK(substream)) 3295 return -ENXIO; 3296 runtime = substream->runtime; 3297 return fasync_helper(fd, file, on, &runtime->fasync); 3298 } 3299 3300 /* 3301 * ioctl32 compat 3302 */ 3303 #ifdef CONFIG_COMPAT 3304 #include "pcm_compat.c" 3305 #else 3306 #define snd_pcm_ioctl_compat NULL 3307 #endif 3308 3309 /* 3310 * To be removed helpers to keep binary compatibility 3311 */ 3312 3313 #ifdef CONFIG_SND_SUPPORT_OLD_API 3314 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5)) 3315 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5)) 3316 3317 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params, 3318 struct snd_pcm_hw_params_old *oparams) 3319 { 3320 unsigned int i; 3321 3322 memset(params, 0, sizeof(*params)); 3323 params->flags = oparams->flags; 3324 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) 3325 params->masks[i].bits[0] = oparams->masks[i]; 3326 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals)); 3327 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask); 3328 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask); 3329 params->info = oparams->info; 3330 params->msbits = oparams->msbits; 3331 params->rate_num = oparams->rate_num; 3332 params->rate_den = oparams->rate_den; 3333 params->fifo_size = oparams->fifo_size; 3334 } 3335 3336 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams, 3337 struct snd_pcm_hw_params *params) 3338 { 3339 unsigned int i; 3340 3341 memset(oparams, 0, sizeof(*oparams)); 3342 oparams->flags = params->flags; 3343 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) 3344 oparams->masks[i] = params->masks[i].bits[0]; 3345 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals)); 3346 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask); 3347 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask); 3348 oparams->info = params->info; 3349 oparams->msbits = params->msbits; 3350 oparams->rate_num = params->rate_num; 3351 oparams->rate_den = params->rate_den; 3352 oparams->fifo_size = params->fifo_size; 3353 } 3354 3355 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, 3356 struct snd_pcm_hw_params_old __user * _oparams) 3357 { 3358 struct snd_pcm_hw_params *params; 3359 struct snd_pcm_hw_params_old *oparams = NULL; 3360 int err; 3361 3362 params = kmalloc(sizeof(*params), GFP_KERNEL); 3363 if (!params) 3364 return -ENOMEM; 3365 3366 oparams = memdup_user(_oparams, sizeof(*oparams)); 3367 if (IS_ERR(oparams)) { 3368 err = PTR_ERR(oparams); 3369 goto out; 3370 } 3371 snd_pcm_hw_convert_from_old_params(params, oparams); 3372 err = snd_pcm_hw_refine(substream, params); 3373 snd_pcm_hw_convert_to_old_params(oparams, params); 3374 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { 3375 if (!err) 3376 err = -EFAULT; 3377 } 3378 3379 kfree(oparams); 3380 out: 3381 kfree(params); 3382 return err; 3383 } 3384 3385 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, 3386 struct snd_pcm_hw_params_old __user * _oparams) 3387 { 3388 struct snd_pcm_hw_params *params; 3389 struct snd_pcm_hw_params_old *oparams = NULL; 3390 int err; 3391 3392 params = kmalloc(sizeof(*params), GFP_KERNEL); 3393 if (!params) 3394 return -ENOMEM; 3395 3396 oparams = memdup_user(_oparams, sizeof(*oparams)); 3397 if (IS_ERR(oparams)) { 3398 err = PTR_ERR(oparams); 3399 goto out; 3400 } 3401 snd_pcm_hw_convert_from_old_params(params, oparams); 3402 err = snd_pcm_hw_params(substream, params); 3403 snd_pcm_hw_convert_to_old_params(oparams, params); 3404 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { 3405 if (!err) 3406 err = -EFAULT; 3407 } 3408 3409 kfree(oparams); 3410 out: 3411 kfree(params); 3412 return err; 3413 } 3414 #endif /* CONFIG_SND_SUPPORT_OLD_API */ 3415 3416 #ifndef CONFIG_MMU 3417 static unsigned long snd_pcm_get_unmapped_area(struct file *file, 3418 unsigned long addr, 3419 unsigned long len, 3420 unsigned long pgoff, 3421 unsigned long flags) 3422 { 3423 struct snd_pcm_file *pcm_file = file->private_data; 3424 struct snd_pcm_substream *substream = pcm_file->substream; 3425 struct snd_pcm_runtime *runtime = substream->runtime; 3426 unsigned long offset = pgoff << PAGE_SHIFT; 3427 3428 switch (offset) { 3429 case SNDRV_PCM_MMAP_OFFSET_STATUS: 3430 return (unsigned long)runtime->status; 3431 case SNDRV_PCM_MMAP_OFFSET_CONTROL: 3432 return (unsigned long)runtime->control; 3433 default: 3434 return (unsigned long)runtime->dma_area + offset; 3435 } 3436 } 3437 #else 3438 # define snd_pcm_get_unmapped_area NULL 3439 #endif 3440 3441 /* 3442 * Register section 3443 */ 3444 3445 const struct file_operations snd_pcm_f_ops[2] = { 3446 { 3447 .owner = THIS_MODULE, 3448 .write = snd_pcm_write, 3449 .aio_write = snd_pcm_aio_write, 3450 .open = snd_pcm_playback_open, 3451 .release = snd_pcm_release, 3452 .llseek = no_llseek, 3453 .poll = snd_pcm_playback_poll, 3454 .unlocked_ioctl = snd_pcm_playback_ioctl, 3455 .compat_ioctl = snd_pcm_ioctl_compat, 3456 .mmap = snd_pcm_mmap, 3457 .fasync = snd_pcm_fasync, 3458 .get_unmapped_area = snd_pcm_get_unmapped_area, 3459 }, 3460 { 3461 .owner = THIS_MODULE, 3462 .read = snd_pcm_read, 3463 .aio_read = snd_pcm_aio_read, 3464 .open = snd_pcm_capture_open, 3465 .release = snd_pcm_release, 3466 .llseek = no_llseek, 3467 .poll = snd_pcm_capture_poll, 3468 .unlocked_ioctl = snd_pcm_capture_ioctl, 3469 .compat_ioctl = snd_pcm_ioctl_compat, 3470 .mmap = snd_pcm_mmap, 3471 .fasync = snd_pcm_fasync, 3472 .get_unmapped_area = snd_pcm_get_unmapped_area, 3473 } 3474 }; 3475