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 char *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->status->state = state; 868 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 869 runtime->silence_size > 0) 870 snd_pcm_playback_silence(substream, ULONG_MAX); 871 if (substream->timer) 872 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART, 873 &runtime->trigger_tstamp); 874 } 875 876 static struct action_ops snd_pcm_action_start = { 877 .pre_action = snd_pcm_pre_start, 878 .do_action = snd_pcm_do_start, 879 .undo_action = snd_pcm_undo_start, 880 .post_action = snd_pcm_post_start 881 }; 882 883 /** 884 * snd_pcm_start - start all linked streams 885 * @substream: the PCM substream instance 886 */ 887 int snd_pcm_start(struct snd_pcm_substream *substream) 888 { 889 return snd_pcm_action(&snd_pcm_action_start, substream, 890 SNDRV_PCM_STATE_RUNNING); 891 } 892 893 /* 894 * stop callbacks 895 */ 896 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state) 897 { 898 struct snd_pcm_runtime *runtime = substream->runtime; 899 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 900 return -EBADFD; 901 runtime->trigger_master = substream; 902 return 0; 903 } 904 905 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state) 906 { 907 if (substream->runtime->trigger_master == substream && 908 snd_pcm_running(substream)) 909 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); 910 return 0; /* unconditonally stop all substreams */ 911 } 912 913 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state) 914 { 915 struct snd_pcm_runtime *runtime = substream->runtime; 916 if (runtime->status->state != state) { 917 snd_pcm_trigger_tstamp(substream); 918 if (substream->timer) 919 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP, 920 &runtime->trigger_tstamp); 921 runtime->status->state = state; 922 } 923 wake_up(&runtime->sleep); 924 wake_up(&runtime->tsleep); 925 } 926 927 static struct action_ops snd_pcm_action_stop = { 928 .pre_action = snd_pcm_pre_stop, 929 .do_action = snd_pcm_do_stop, 930 .post_action = snd_pcm_post_stop 931 }; 932 933 /** 934 * snd_pcm_stop - try to stop all running streams in the substream group 935 * @substream: the PCM substream instance 936 * @state: PCM state after stopping the stream 937 * 938 * The state of each stream is then changed to the given state unconditionally. 939 */ 940 int snd_pcm_stop(struct snd_pcm_substream *substream, int state) 941 { 942 return snd_pcm_action(&snd_pcm_action_stop, substream, state); 943 } 944 945 EXPORT_SYMBOL(snd_pcm_stop); 946 947 /** 948 * snd_pcm_drain_done - stop the DMA only when the given stream is playback 949 * @substream: the PCM substream 950 * 951 * After stopping, the state is changed to SETUP. 952 * Unlike snd_pcm_stop(), this affects only the given stream. 953 */ 954 int snd_pcm_drain_done(struct snd_pcm_substream *substream) 955 { 956 return snd_pcm_action_single(&snd_pcm_action_stop, substream, 957 SNDRV_PCM_STATE_SETUP); 958 } 959 960 /* 961 * pause callbacks 962 */ 963 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push) 964 { 965 struct snd_pcm_runtime *runtime = substream->runtime; 966 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE)) 967 return -ENOSYS; 968 if (push) { 969 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING) 970 return -EBADFD; 971 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED) 972 return -EBADFD; 973 runtime->trigger_master = substream; 974 return 0; 975 } 976 977 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push) 978 { 979 if (substream->runtime->trigger_master != substream) 980 return 0; 981 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by 982 * a delta betwen the current jiffies, this gives a large enough 983 * delta, effectively to skip the check once. 984 */ 985 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000; 986 return substream->ops->trigger(substream, 987 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH : 988 SNDRV_PCM_TRIGGER_PAUSE_RELEASE); 989 } 990 991 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push) 992 { 993 if (substream->runtime->trigger_master == substream) 994 substream->ops->trigger(substream, 995 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE : 996 SNDRV_PCM_TRIGGER_PAUSE_PUSH); 997 } 998 999 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push) 1000 { 1001 struct snd_pcm_runtime *runtime = substream->runtime; 1002 snd_pcm_trigger_tstamp(substream); 1003 if (push) { 1004 runtime->status->state = SNDRV_PCM_STATE_PAUSED; 1005 if (substream->timer) 1006 snd_timer_notify(substream->timer, 1007 SNDRV_TIMER_EVENT_MPAUSE, 1008 &runtime->trigger_tstamp); 1009 wake_up(&runtime->sleep); 1010 wake_up(&runtime->tsleep); 1011 } else { 1012 runtime->status->state = SNDRV_PCM_STATE_RUNNING; 1013 if (substream->timer) 1014 snd_timer_notify(substream->timer, 1015 SNDRV_TIMER_EVENT_MCONTINUE, 1016 &runtime->trigger_tstamp); 1017 } 1018 } 1019 1020 static struct action_ops snd_pcm_action_pause = { 1021 .pre_action = snd_pcm_pre_pause, 1022 .do_action = snd_pcm_do_pause, 1023 .undo_action = snd_pcm_undo_pause, 1024 .post_action = snd_pcm_post_pause 1025 }; 1026 1027 /* 1028 * Push/release the pause for all linked streams. 1029 */ 1030 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push) 1031 { 1032 return snd_pcm_action(&snd_pcm_action_pause, substream, push); 1033 } 1034 1035 #ifdef CONFIG_PM 1036 /* suspend */ 1037 1038 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state) 1039 { 1040 struct snd_pcm_runtime *runtime = substream->runtime; 1041 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1042 return -EBUSY; 1043 runtime->trigger_master = substream; 1044 return 0; 1045 } 1046 1047 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state) 1048 { 1049 struct snd_pcm_runtime *runtime = substream->runtime; 1050 if (runtime->trigger_master != substream) 1051 return 0; 1052 if (! snd_pcm_running(substream)) 1053 return 0; 1054 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); 1055 return 0; /* suspend unconditionally */ 1056 } 1057 1058 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state) 1059 { 1060 struct snd_pcm_runtime *runtime = substream->runtime; 1061 snd_pcm_trigger_tstamp(substream); 1062 if (substream->timer) 1063 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND, 1064 &runtime->trigger_tstamp); 1065 runtime->status->suspended_state = runtime->status->state; 1066 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED; 1067 wake_up(&runtime->sleep); 1068 wake_up(&runtime->tsleep); 1069 } 1070 1071 static struct action_ops snd_pcm_action_suspend = { 1072 .pre_action = snd_pcm_pre_suspend, 1073 .do_action = snd_pcm_do_suspend, 1074 .post_action = snd_pcm_post_suspend 1075 }; 1076 1077 /** 1078 * snd_pcm_suspend - trigger SUSPEND to all linked streams 1079 * @substream: the PCM substream 1080 * 1081 * After this call, all streams are changed to SUSPENDED state. 1082 */ 1083 int snd_pcm_suspend(struct snd_pcm_substream *substream) 1084 { 1085 int err; 1086 unsigned long flags; 1087 1088 if (! substream) 1089 return 0; 1090 1091 snd_pcm_stream_lock_irqsave(substream, flags); 1092 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0); 1093 snd_pcm_stream_unlock_irqrestore(substream, flags); 1094 return err; 1095 } 1096 1097 EXPORT_SYMBOL(snd_pcm_suspend); 1098 1099 /** 1100 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm 1101 * @pcm: the PCM instance 1102 * 1103 * After this call, all streams are changed to SUSPENDED state. 1104 */ 1105 int snd_pcm_suspend_all(struct snd_pcm *pcm) 1106 { 1107 struct snd_pcm_substream *substream; 1108 int stream, err = 0; 1109 1110 if (! pcm) 1111 return 0; 1112 1113 for (stream = 0; stream < 2; stream++) { 1114 for (substream = pcm->streams[stream].substream; 1115 substream; substream = substream->next) { 1116 /* FIXME: the open/close code should lock this as well */ 1117 if (substream->runtime == NULL) 1118 continue; 1119 err = snd_pcm_suspend(substream); 1120 if (err < 0 && err != -EBUSY) 1121 return err; 1122 } 1123 } 1124 return 0; 1125 } 1126 1127 EXPORT_SYMBOL(snd_pcm_suspend_all); 1128 1129 /* resume */ 1130 1131 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state) 1132 { 1133 struct snd_pcm_runtime *runtime = substream->runtime; 1134 if (!(runtime->info & SNDRV_PCM_INFO_RESUME)) 1135 return -ENOSYS; 1136 runtime->trigger_master = substream; 1137 return 0; 1138 } 1139 1140 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state) 1141 { 1142 struct snd_pcm_runtime *runtime = substream->runtime; 1143 if (runtime->trigger_master != substream) 1144 return 0; 1145 /* DMA not running previously? */ 1146 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING && 1147 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING || 1148 substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) 1149 return 0; 1150 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME); 1151 } 1152 1153 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state) 1154 { 1155 if (substream->runtime->trigger_master == substream && 1156 snd_pcm_running(substream)) 1157 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); 1158 } 1159 1160 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state) 1161 { 1162 struct snd_pcm_runtime *runtime = substream->runtime; 1163 snd_pcm_trigger_tstamp(substream); 1164 if (substream->timer) 1165 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME, 1166 &runtime->trigger_tstamp); 1167 runtime->status->state = runtime->status->suspended_state; 1168 } 1169 1170 static struct action_ops snd_pcm_action_resume = { 1171 .pre_action = snd_pcm_pre_resume, 1172 .do_action = snd_pcm_do_resume, 1173 .undo_action = snd_pcm_undo_resume, 1174 .post_action = snd_pcm_post_resume 1175 }; 1176 1177 static int snd_pcm_resume(struct snd_pcm_substream *substream) 1178 { 1179 struct snd_card *card = substream->pcm->card; 1180 int res; 1181 1182 snd_power_lock(card); 1183 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) 1184 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0); 1185 snd_power_unlock(card); 1186 return res; 1187 } 1188 1189 #else 1190 1191 static int snd_pcm_resume(struct snd_pcm_substream *substream) 1192 { 1193 return -ENOSYS; 1194 } 1195 1196 #endif /* CONFIG_PM */ 1197 1198 /* 1199 * xrun ioctl 1200 * 1201 * Change the RUNNING stream(s) to XRUN state. 1202 */ 1203 static int snd_pcm_xrun(struct snd_pcm_substream *substream) 1204 { 1205 struct snd_card *card = substream->pcm->card; 1206 struct snd_pcm_runtime *runtime = substream->runtime; 1207 int result; 1208 1209 snd_power_lock(card); 1210 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1211 result = snd_power_wait(card, SNDRV_CTL_POWER_D0); 1212 if (result < 0) 1213 goto _unlock; 1214 } 1215 1216 snd_pcm_stream_lock_irq(substream); 1217 switch (runtime->status->state) { 1218 case SNDRV_PCM_STATE_XRUN: 1219 result = 0; /* already there */ 1220 break; 1221 case SNDRV_PCM_STATE_RUNNING: 1222 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); 1223 break; 1224 default: 1225 result = -EBADFD; 1226 } 1227 snd_pcm_stream_unlock_irq(substream); 1228 _unlock: 1229 snd_power_unlock(card); 1230 return result; 1231 } 1232 1233 /* 1234 * reset ioctl 1235 */ 1236 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state) 1237 { 1238 struct snd_pcm_runtime *runtime = substream->runtime; 1239 switch (runtime->status->state) { 1240 case SNDRV_PCM_STATE_RUNNING: 1241 case SNDRV_PCM_STATE_PREPARED: 1242 case SNDRV_PCM_STATE_PAUSED: 1243 case SNDRV_PCM_STATE_SUSPENDED: 1244 return 0; 1245 default: 1246 return -EBADFD; 1247 } 1248 } 1249 1250 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state) 1251 { 1252 struct snd_pcm_runtime *runtime = substream->runtime; 1253 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL); 1254 if (err < 0) 1255 return err; 1256 runtime->hw_ptr_base = 0; 1257 runtime->hw_ptr_interrupt = runtime->status->hw_ptr - 1258 runtime->status->hw_ptr % runtime->period_size; 1259 runtime->silence_start = runtime->status->hw_ptr; 1260 runtime->silence_filled = 0; 1261 return 0; 1262 } 1263 1264 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state) 1265 { 1266 struct snd_pcm_runtime *runtime = substream->runtime; 1267 runtime->control->appl_ptr = runtime->status->hw_ptr; 1268 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 1269 runtime->silence_size > 0) 1270 snd_pcm_playback_silence(substream, ULONG_MAX); 1271 } 1272 1273 static struct action_ops snd_pcm_action_reset = { 1274 .pre_action = snd_pcm_pre_reset, 1275 .do_action = snd_pcm_do_reset, 1276 .post_action = snd_pcm_post_reset 1277 }; 1278 1279 static int snd_pcm_reset(struct snd_pcm_substream *substream) 1280 { 1281 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0); 1282 } 1283 1284 /* 1285 * prepare ioctl 1286 */ 1287 /* we use the second argument for updating f_flags */ 1288 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream, 1289 int f_flags) 1290 { 1291 struct snd_pcm_runtime *runtime = substream->runtime; 1292 if (runtime->status->state == SNDRV_PCM_STATE_OPEN || 1293 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED) 1294 return -EBADFD; 1295 if (snd_pcm_running(substream)) 1296 return -EBUSY; 1297 substream->f_flags = f_flags; 1298 return 0; 1299 } 1300 1301 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state) 1302 { 1303 int err; 1304 err = substream->ops->prepare(substream); 1305 if (err < 0) 1306 return err; 1307 return snd_pcm_do_reset(substream, 0); 1308 } 1309 1310 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state) 1311 { 1312 struct snd_pcm_runtime *runtime = substream->runtime; 1313 runtime->control->appl_ptr = runtime->status->hw_ptr; 1314 runtime->status->state = SNDRV_PCM_STATE_PREPARED; 1315 } 1316 1317 static struct action_ops snd_pcm_action_prepare = { 1318 .pre_action = snd_pcm_pre_prepare, 1319 .do_action = snd_pcm_do_prepare, 1320 .post_action = snd_pcm_post_prepare 1321 }; 1322 1323 /** 1324 * snd_pcm_prepare - prepare the PCM substream to be triggerable 1325 * @substream: the PCM substream instance 1326 * @file: file to refer f_flags 1327 */ 1328 static int snd_pcm_prepare(struct snd_pcm_substream *substream, 1329 struct file *file) 1330 { 1331 int res; 1332 struct snd_card *card = substream->pcm->card; 1333 int f_flags; 1334 1335 if (file) 1336 f_flags = file->f_flags; 1337 else 1338 f_flags = substream->f_flags; 1339 1340 snd_power_lock(card); 1341 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) 1342 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare, 1343 substream, f_flags); 1344 snd_power_unlock(card); 1345 return res; 1346 } 1347 1348 /* 1349 * drain ioctl 1350 */ 1351 1352 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state) 1353 { 1354 substream->runtime->trigger_master = substream; 1355 return 0; 1356 } 1357 1358 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state) 1359 { 1360 struct snd_pcm_runtime *runtime = substream->runtime; 1361 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 1362 switch (runtime->status->state) { 1363 case SNDRV_PCM_STATE_PREPARED: 1364 /* start playback stream if possible */ 1365 if (! snd_pcm_playback_empty(substream)) { 1366 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING); 1367 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING); 1368 } 1369 break; 1370 case SNDRV_PCM_STATE_RUNNING: 1371 runtime->status->state = SNDRV_PCM_STATE_DRAINING; 1372 break; 1373 default: 1374 break; 1375 } 1376 } else { 1377 /* stop running stream */ 1378 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) { 1379 int new_state = snd_pcm_capture_avail(runtime) > 0 ? 1380 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP; 1381 snd_pcm_do_stop(substream, new_state); 1382 snd_pcm_post_stop(substream, new_state); 1383 } 1384 } 1385 return 0; 1386 } 1387 1388 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state) 1389 { 1390 } 1391 1392 static struct action_ops snd_pcm_action_drain_init = { 1393 .pre_action = snd_pcm_pre_drain_init, 1394 .do_action = snd_pcm_do_drain_init, 1395 .post_action = snd_pcm_post_drain_init 1396 }; 1397 1398 static int snd_pcm_drop(struct snd_pcm_substream *substream); 1399 1400 /* 1401 * Drain the stream(s). 1402 * When the substream is linked, sync until the draining of all playback streams 1403 * is finished. 1404 * After this call, all streams are supposed to be either SETUP or DRAINING 1405 * (capture only) state. 1406 */ 1407 static int snd_pcm_drain(struct snd_pcm_substream *substream, 1408 struct file *file) 1409 { 1410 struct snd_card *card; 1411 struct snd_pcm_runtime *runtime; 1412 struct snd_pcm_substream *s; 1413 wait_queue_t wait; 1414 int result = 0; 1415 int nonblock = 0; 1416 1417 card = substream->pcm->card; 1418 runtime = substream->runtime; 1419 1420 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 1421 return -EBADFD; 1422 1423 snd_power_lock(card); 1424 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1425 result = snd_power_wait(card, SNDRV_CTL_POWER_D0); 1426 if (result < 0) { 1427 snd_power_unlock(card); 1428 return result; 1429 } 1430 } 1431 1432 if (file) { 1433 if (file->f_flags & O_NONBLOCK) 1434 nonblock = 1; 1435 } else if (substream->f_flags & O_NONBLOCK) 1436 nonblock = 1; 1437 1438 down_read(&snd_pcm_link_rwsem); 1439 snd_pcm_stream_lock_irq(substream); 1440 /* resume pause */ 1441 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) 1442 snd_pcm_pause(substream, 0); 1443 1444 /* pre-start/stop - all running streams are changed to DRAINING state */ 1445 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0); 1446 if (result < 0) 1447 goto unlock; 1448 /* in non-blocking, we don't wait in ioctl but let caller poll */ 1449 if (nonblock) { 1450 result = -EAGAIN; 1451 goto unlock; 1452 } 1453 1454 for (;;) { 1455 long tout; 1456 struct snd_pcm_runtime *to_check; 1457 if (signal_pending(current)) { 1458 result = -ERESTARTSYS; 1459 break; 1460 } 1461 /* find a substream to drain */ 1462 to_check = NULL; 1463 snd_pcm_group_for_each_entry(s, substream) { 1464 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK) 1465 continue; 1466 runtime = s->runtime; 1467 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 1468 to_check = runtime; 1469 break; 1470 } 1471 } 1472 if (!to_check) 1473 break; /* all drained */ 1474 init_waitqueue_entry(&wait, current); 1475 add_wait_queue(&to_check->sleep, &wait); 1476 set_current_state(TASK_INTERRUPTIBLE); 1477 snd_pcm_stream_unlock_irq(substream); 1478 up_read(&snd_pcm_link_rwsem); 1479 snd_power_unlock(card); 1480 tout = schedule_timeout(10 * HZ); 1481 snd_power_lock(card); 1482 down_read(&snd_pcm_link_rwsem); 1483 snd_pcm_stream_lock_irq(substream); 1484 remove_wait_queue(&to_check->sleep, &wait); 1485 if (tout == 0) { 1486 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1487 result = -ESTRPIPE; 1488 else { 1489 snd_printd("playback drain error (DMA or IRQ trouble?)\n"); 1490 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1491 result = -EIO; 1492 } 1493 break; 1494 } 1495 } 1496 1497 unlock: 1498 snd_pcm_stream_unlock_irq(substream); 1499 up_read(&snd_pcm_link_rwsem); 1500 snd_power_unlock(card); 1501 1502 return result; 1503 } 1504 1505 /* 1506 * drop ioctl 1507 * 1508 * Immediately put all linked substreams into SETUP state. 1509 */ 1510 static int snd_pcm_drop(struct snd_pcm_substream *substream) 1511 { 1512 struct snd_pcm_runtime *runtime; 1513 struct snd_card *card; 1514 int result = 0; 1515 1516 if (PCM_RUNTIME_CHECK(substream)) 1517 return -ENXIO; 1518 runtime = substream->runtime; 1519 card = substream->pcm->card; 1520 1521 if (runtime->status->state == SNDRV_PCM_STATE_OPEN || 1522 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED || 1523 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1524 return -EBADFD; 1525 1526 snd_pcm_stream_lock_irq(substream); 1527 /* resume pause */ 1528 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) 1529 snd_pcm_pause(substream, 0); 1530 1531 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1532 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */ 1533 snd_pcm_stream_unlock_irq(substream); 1534 1535 return result; 1536 } 1537 1538 1539 /* WARNING: Don't forget to fput back the file */ 1540 static struct file *snd_pcm_file_fd(int fd) 1541 { 1542 struct file *file; 1543 struct inode *inode; 1544 unsigned int minor; 1545 1546 file = fget(fd); 1547 if (!file) 1548 return NULL; 1549 inode = file->f_path.dentry->d_inode; 1550 if (!S_ISCHR(inode->i_mode) || 1551 imajor(inode) != snd_major) { 1552 fput(file); 1553 return NULL; 1554 } 1555 minor = iminor(inode); 1556 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) && 1557 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) { 1558 fput(file); 1559 return NULL; 1560 } 1561 return file; 1562 } 1563 1564 /* 1565 * PCM link handling 1566 */ 1567 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd) 1568 { 1569 int res = 0; 1570 struct file *file; 1571 struct snd_pcm_file *pcm_file; 1572 struct snd_pcm_substream *substream1; 1573 1574 file = snd_pcm_file_fd(fd); 1575 if (!file) 1576 return -EBADFD; 1577 pcm_file = file->private_data; 1578 substream1 = pcm_file->substream; 1579 down_write(&snd_pcm_link_rwsem); 1580 write_lock_irq(&snd_pcm_link_rwlock); 1581 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN || 1582 substream->runtime->status->state != substream1->runtime->status->state) { 1583 res = -EBADFD; 1584 goto _end; 1585 } 1586 if (snd_pcm_stream_linked(substream1)) { 1587 res = -EALREADY; 1588 goto _end; 1589 } 1590 if (!snd_pcm_stream_linked(substream)) { 1591 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC); 1592 if (substream->group == NULL) { 1593 res = -ENOMEM; 1594 goto _end; 1595 } 1596 spin_lock_init(&substream->group->lock); 1597 INIT_LIST_HEAD(&substream->group->substreams); 1598 list_add_tail(&substream->link_list, &substream->group->substreams); 1599 substream->group->count = 1; 1600 } 1601 list_add_tail(&substream1->link_list, &substream->group->substreams); 1602 substream->group->count++; 1603 substream1->group = substream->group; 1604 _end: 1605 write_unlock_irq(&snd_pcm_link_rwlock); 1606 up_write(&snd_pcm_link_rwsem); 1607 fput(file); 1608 return res; 1609 } 1610 1611 static void relink_to_local(struct snd_pcm_substream *substream) 1612 { 1613 substream->group = &substream->self_group; 1614 INIT_LIST_HEAD(&substream->self_group.substreams); 1615 list_add_tail(&substream->link_list, &substream->self_group.substreams); 1616 } 1617 1618 static int snd_pcm_unlink(struct snd_pcm_substream *substream) 1619 { 1620 struct snd_pcm_substream *s; 1621 int res = 0; 1622 1623 down_write(&snd_pcm_link_rwsem); 1624 write_lock_irq(&snd_pcm_link_rwlock); 1625 if (!snd_pcm_stream_linked(substream)) { 1626 res = -EALREADY; 1627 goto _end; 1628 } 1629 list_del(&substream->link_list); 1630 substream->group->count--; 1631 if (substream->group->count == 1) { /* detach the last stream, too */ 1632 snd_pcm_group_for_each_entry(s, substream) { 1633 relink_to_local(s); 1634 break; 1635 } 1636 kfree(substream->group); 1637 } 1638 relink_to_local(substream); 1639 _end: 1640 write_unlock_irq(&snd_pcm_link_rwlock); 1641 up_write(&snd_pcm_link_rwsem); 1642 return res; 1643 } 1644 1645 /* 1646 * hw configurator 1647 */ 1648 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params, 1649 struct snd_pcm_hw_rule *rule) 1650 { 1651 struct snd_interval t; 1652 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]), 1653 hw_param_interval_c(params, rule->deps[1]), &t); 1654 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1655 } 1656 1657 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params, 1658 struct snd_pcm_hw_rule *rule) 1659 { 1660 struct snd_interval t; 1661 snd_interval_div(hw_param_interval_c(params, rule->deps[0]), 1662 hw_param_interval_c(params, rule->deps[1]), &t); 1663 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1664 } 1665 1666 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params, 1667 struct snd_pcm_hw_rule *rule) 1668 { 1669 struct snd_interval t; 1670 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]), 1671 hw_param_interval_c(params, rule->deps[1]), 1672 (unsigned long) rule->private, &t); 1673 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1674 } 1675 1676 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params, 1677 struct snd_pcm_hw_rule *rule) 1678 { 1679 struct snd_interval t; 1680 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]), 1681 (unsigned long) rule->private, 1682 hw_param_interval_c(params, rule->deps[1]), &t); 1683 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1684 } 1685 1686 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params, 1687 struct snd_pcm_hw_rule *rule) 1688 { 1689 unsigned int k; 1690 struct snd_interval *i = hw_param_interval(params, rule->deps[0]); 1691 struct snd_mask m; 1692 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 1693 snd_mask_any(&m); 1694 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { 1695 int bits; 1696 if (! snd_mask_test(mask, k)) 1697 continue; 1698 bits = snd_pcm_format_physical_width(k); 1699 if (bits <= 0) 1700 continue; /* ignore invalid formats */ 1701 if ((unsigned)bits < i->min || (unsigned)bits > i->max) 1702 snd_mask_reset(&m, k); 1703 } 1704 return snd_mask_refine(mask, &m); 1705 } 1706 1707 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params, 1708 struct snd_pcm_hw_rule *rule) 1709 { 1710 struct snd_interval t; 1711 unsigned int k; 1712 t.min = UINT_MAX; 1713 t.max = 0; 1714 t.openmin = 0; 1715 t.openmax = 0; 1716 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { 1717 int bits; 1718 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k)) 1719 continue; 1720 bits = snd_pcm_format_physical_width(k); 1721 if (bits <= 0) 1722 continue; /* ignore invalid formats */ 1723 if (t.min > (unsigned)bits) 1724 t.min = bits; 1725 if (t.max < (unsigned)bits) 1726 t.max = bits; 1727 } 1728 t.integer = 1; 1729 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1730 } 1731 1732 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12 1733 #error "Change this table" 1734 #endif 1735 1736 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100, 1737 48000, 64000, 88200, 96000, 176400, 192000 }; 1738 1739 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = { 1740 .count = ARRAY_SIZE(rates), 1741 .list = rates, 1742 }; 1743 1744 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params, 1745 struct snd_pcm_hw_rule *rule) 1746 { 1747 struct snd_pcm_hardware *hw = rule->private; 1748 return snd_interval_list(hw_param_interval(params, rule->var), 1749 snd_pcm_known_rates.count, 1750 snd_pcm_known_rates.list, hw->rates); 1751 } 1752 1753 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params, 1754 struct snd_pcm_hw_rule *rule) 1755 { 1756 struct snd_interval t; 1757 struct snd_pcm_substream *substream = rule->private; 1758 t.min = 0; 1759 t.max = substream->buffer_bytes_max; 1760 t.openmin = 0; 1761 t.openmax = 0; 1762 t.integer = 1; 1763 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1764 } 1765 1766 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream) 1767 { 1768 struct snd_pcm_runtime *runtime = substream->runtime; 1769 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; 1770 int k, err; 1771 1772 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { 1773 snd_mask_any(constrs_mask(constrs, k)); 1774 } 1775 1776 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { 1777 snd_interval_any(constrs_interval(constrs, k)); 1778 } 1779 1780 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS)); 1781 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)); 1782 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)); 1783 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)); 1784 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS)); 1785 1786 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, 1787 snd_pcm_hw_rule_format, NULL, 1788 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1789 if (err < 0) 1790 return err; 1791 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 1792 snd_pcm_hw_rule_sample_bits, NULL, 1793 SNDRV_PCM_HW_PARAM_FORMAT, 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_div, NULL, 1799 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); 1800 if (err < 0) 1801 return err; 1802 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1803 snd_pcm_hw_rule_mul, NULL, 1804 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); 1805 if (err < 0) 1806 return err; 1807 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1808 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1809 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 1810 if (err < 0) 1811 return err; 1812 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1813 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1814 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1); 1815 if (err < 0) 1816 return err; 1817 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 1818 snd_pcm_hw_rule_div, NULL, 1819 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1820 if (err < 0) 1821 return err; 1822 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1823 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1824 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1); 1825 if (err < 0) 1826 return err; 1827 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1828 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1829 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1); 1830 if (err < 0) 1831 return err; 1832 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, 1833 snd_pcm_hw_rule_div, NULL, 1834 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 1835 if (err < 0) 1836 return err; 1837 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1838 snd_pcm_hw_rule_div, NULL, 1839 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); 1840 if (err < 0) 1841 return err; 1842 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1843 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1844 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1845 if (err < 0) 1846 return err; 1847 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1848 snd_pcm_hw_rule_muldivk, (void*) 1000000, 1849 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); 1850 if (err < 0) 1851 return err; 1852 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1853 snd_pcm_hw_rule_mul, NULL, 1854 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); 1855 if (err < 0) 1856 return err; 1857 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1858 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1859 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1860 if (err < 0) 1861 return err; 1862 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1863 snd_pcm_hw_rule_muldivk, (void*) 1000000, 1864 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); 1865 if (err < 0) 1866 return err; 1867 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 1868 snd_pcm_hw_rule_muldivk, (void*) 8, 1869 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1870 if (err < 0) 1871 return err; 1872 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1873 snd_pcm_hw_rule_muldivk, (void*) 8, 1874 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1875 if (err < 0) 1876 return err; 1877 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 1878 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1879 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); 1880 if (err < 0) 1881 return err; 1882 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME, 1883 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1884 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); 1885 if (err < 0) 1886 return err; 1887 return 0; 1888 } 1889 1890 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream) 1891 { 1892 struct snd_pcm_runtime *runtime = substream->runtime; 1893 struct snd_pcm_hardware *hw = &runtime->hw; 1894 int err; 1895 unsigned int mask = 0; 1896 1897 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) 1898 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED; 1899 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) 1900 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED; 1901 if (hw->info & SNDRV_PCM_INFO_MMAP) { 1902 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) 1903 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; 1904 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) 1905 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED; 1906 if (hw->info & SNDRV_PCM_INFO_COMPLEX) 1907 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX; 1908 } 1909 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask); 1910 if (err < 0) 1911 return err; 1912 1913 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats); 1914 if (err < 0) 1915 return err; 1916 1917 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD); 1918 if (err < 0) 1919 return err; 1920 1921 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, 1922 hw->channels_min, hw->channels_max); 1923 if (err < 0) 1924 return err; 1925 1926 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE, 1927 hw->rate_min, hw->rate_max); 1928 if (err < 0) 1929 return err; 1930 1931 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 1932 hw->period_bytes_min, hw->period_bytes_max); 1933 if (err < 0) 1934 return err; 1935 1936 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS, 1937 hw->periods_min, hw->periods_max); 1938 if (err < 0) 1939 return err; 1940 1941 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1942 hw->period_bytes_min, hw->buffer_bytes_max); 1943 if (err < 0) 1944 return err; 1945 1946 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1947 snd_pcm_hw_rule_buffer_bytes_max, substream, 1948 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1); 1949 if (err < 0) 1950 return err; 1951 1952 /* FIXME: remove */ 1953 if (runtime->dma_bytes) { 1954 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes); 1955 if (err < 0) 1956 return -EINVAL; 1957 } 1958 1959 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) { 1960 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1961 snd_pcm_hw_rule_rate, hw, 1962 SNDRV_PCM_HW_PARAM_RATE, -1); 1963 if (err < 0) 1964 return err; 1965 } 1966 1967 /* FIXME: this belong to lowlevel */ 1968 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE); 1969 1970 return 0; 1971 } 1972 1973 static void pcm_release_private(struct snd_pcm_substream *substream) 1974 { 1975 snd_pcm_unlink(substream); 1976 } 1977 1978 void snd_pcm_release_substream(struct snd_pcm_substream *substream) 1979 { 1980 substream->ref_count--; 1981 if (substream->ref_count > 0) 1982 return; 1983 1984 snd_pcm_drop(substream); 1985 if (substream->hw_opened) { 1986 if (substream->ops->hw_free != NULL) 1987 substream->ops->hw_free(substream); 1988 substream->ops->close(substream); 1989 substream->hw_opened = 0; 1990 } 1991 if (substream->pcm_release) { 1992 substream->pcm_release(substream); 1993 substream->pcm_release = NULL; 1994 } 1995 snd_pcm_detach_substream(substream); 1996 } 1997 1998 EXPORT_SYMBOL(snd_pcm_release_substream); 1999 2000 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, 2001 struct file *file, 2002 struct snd_pcm_substream **rsubstream) 2003 { 2004 struct snd_pcm_substream *substream; 2005 int err; 2006 2007 err = snd_pcm_attach_substream(pcm, stream, file, &substream); 2008 if (err < 0) 2009 return err; 2010 if (substream->ref_count > 1) { 2011 *rsubstream = substream; 2012 return 0; 2013 } 2014 2015 err = snd_pcm_hw_constraints_init(substream); 2016 if (err < 0) { 2017 snd_printd("snd_pcm_hw_constraints_init failed\n"); 2018 goto error; 2019 } 2020 2021 if ((err = substream->ops->open(substream)) < 0) 2022 goto error; 2023 2024 substream->hw_opened = 1; 2025 2026 err = snd_pcm_hw_constraints_complete(substream); 2027 if (err < 0) { 2028 snd_printd("snd_pcm_hw_constraints_complete failed\n"); 2029 goto error; 2030 } 2031 2032 *rsubstream = substream; 2033 return 0; 2034 2035 error: 2036 snd_pcm_release_substream(substream); 2037 return err; 2038 } 2039 2040 EXPORT_SYMBOL(snd_pcm_open_substream); 2041 2042 static int snd_pcm_open_file(struct file *file, 2043 struct snd_pcm *pcm, 2044 int stream, 2045 struct snd_pcm_file **rpcm_file) 2046 { 2047 struct snd_pcm_file *pcm_file; 2048 struct snd_pcm_substream *substream; 2049 struct snd_pcm_str *str; 2050 int err; 2051 2052 if (rpcm_file) 2053 *rpcm_file = NULL; 2054 2055 err = snd_pcm_open_substream(pcm, stream, file, &substream); 2056 if (err < 0) 2057 return err; 2058 2059 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL); 2060 if (pcm_file == NULL) { 2061 snd_pcm_release_substream(substream); 2062 return -ENOMEM; 2063 } 2064 pcm_file->substream = substream; 2065 if (substream->ref_count == 1) { 2066 str = substream->pstr; 2067 substream->file = pcm_file; 2068 substream->pcm_release = pcm_release_private; 2069 } 2070 file->private_data = pcm_file; 2071 if (rpcm_file) 2072 *rpcm_file = pcm_file; 2073 return 0; 2074 } 2075 2076 static int snd_pcm_playback_open(struct inode *inode, struct file *file) 2077 { 2078 struct snd_pcm *pcm; 2079 int err = nonseekable_open(inode, file); 2080 if (err < 0) 2081 return err; 2082 pcm = snd_lookup_minor_data(iminor(inode), 2083 SNDRV_DEVICE_TYPE_PCM_PLAYBACK); 2084 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK); 2085 } 2086 2087 static int snd_pcm_capture_open(struct inode *inode, struct file *file) 2088 { 2089 struct snd_pcm *pcm; 2090 int err = nonseekable_open(inode, file); 2091 if (err < 0) 2092 return err; 2093 pcm = snd_lookup_minor_data(iminor(inode), 2094 SNDRV_DEVICE_TYPE_PCM_CAPTURE); 2095 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE); 2096 } 2097 2098 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream) 2099 { 2100 int err; 2101 struct snd_pcm_file *pcm_file; 2102 wait_queue_t wait; 2103 2104 if (pcm == NULL) { 2105 err = -ENODEV; 2106 goto __error1; 2107 } 2108 err = snd_card_file_add(pcm->card, file); 2109 if (err < 0) 2110 goto __error1; 2111 if (!try_module_get(pcm->card->module)) { 2112 err = -EFAULT; 2113 goto __error2; 2114 } 2115 init_waitqueue_entry(&wait, current); 2116 add_wait_queue(&pcm->open_wait, &wait); 2117 mutex_lock(&pcm->open_mutex); 2118 while (1) { 2119 err = snd_pcm_open_file(file, pcm, stream, &pcm_file); 2120 if (err >= 0) 2121 break; 2122 if (err == -EAGAIN) { 2123 if (file->f_flags & O_NONBLOCK) { 2124 err = -EBUSY; 2125 break; 2126 } 2127 } else 2128 break; 2129 set_current_state(TASK_INTERRUPTIBLE); 2130 mutex_unlock(&pcm->open_mutex); 2131 schedule(); 2132 mutex_lock(&pcm->open_mutex); 2133 if (signal_pending(current)) { 2134 err = -ERESTARTSYS; 2135 break; 2136 } 2137 } 2138 remove_wait_queue(&pcm->open_wait, &wait); 2139 mutex_unlock(&pcm->open_mutex); 2140 if (err < 0) 2141 goto __error; 2142 return err; 2143 2144 __error: 2145 module_put(pcm->card->module); 2146 __error2: 2147 snd_card_file_remove(pcm->card, file); 2148 __error1: 2149 return err; 2150 } 2151 2152 static int snd_pcm_release(struct inode *inode, struct file *file) 2153 { 2154 struct snd_pcm *pcm; 2155 struct snd_pcm_substream *substream; 2156 struct snd_pcm_file *pcm_file; 2157 2158 pcm_file = file->private_data; 2159 substream = pcm_file->substream; 2160 if (snd_BUG_ON(!substream)) 2161 return -ENXIO; 2162 pcm = substream->pcm; 2163 mutex_lock(&pcm->open_mutex); 2164 snd_pcm_release_substream(substream); 2165 kfree(pcm_file); 2166 mutex_unlock(&pcm->open_mutex); 2167 wake_up(&pcm->open_wait); 2168 module_put(pcm->card->module); 2169 snd_card_file_remove(pcm->card, file); 2170 return 0; 2171 } 2172 2173 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream, 2174 snd_pcm_uframes_t frames) 2175 { 2176 struct snd_pcm_runtime *runtime = substream->runtime; 2177 snd_pcm_sframes_t appl_ptr; 2178 snd_pcm_sframes_t ret; 2179 snd_pcm_sframes_t hw_avail; 2180 2181 if (frames == 0) 2182 return 0; 2183 2184 snd_pcm_stream_lock_irq(substream); 2185 switch (runtime->status->state) { 2186 case SNDRV_PCM_STATE_PREPARED: 2187 break; 2188 case SNDRV_PCM_STATE_DRAINING: 2189 case SNDRV_PCM_STATE_RUNNING: 2190 if (snd_pcm_update_hw_ptr(substream) >= 0) 2191 break; 2192 /* Fall through */ 2193 case SNDRV_PCM_STATE_XRUN: 2194 ret = -EPIPE; 2195 goto __end; 2196 case SNDRV_PCM_STATE_SUSPENDED: 2197 ret = -ESTRPIPE; 2198 goto __end; 2199 default: 2200 ret = -EBADFD; 2201 goto __end; 2202 } 2203 2204 hw_avail = snd_pcm_playback_hw_avail(runtime); 2205 if (hw_avail <= 0) { 2206 ret = 0; 2207 goto __end; 2208 } 2209 if (frames > (snd_pcm_uframes_t)hw_avail) 2210 frames = hw_avail; 2211 appl_ptr = runtime->control->appl_ptr - frames; 2212 if (appl_ptr < 0) 2213 appl_ptr += runtime->boundary; 2214 runtime->control->appl_ptr = appl_ptr; 2215 ret = frames; 2216 __end: 2217 snd_pcm_stream_unlock_irq(substream); 2218 return ret; 2219 } 2220 2221 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream, 2222 snd_pcm_uframes_t frames) 2223 { 2224 struct snd_pcm_runtime *runtime = substream->runtime; 2225 snd_pcm_sframes_t appl_ptr; 2226 snd_pcm_sframes_t ret; 2227 snd_pcm_sframes_t hw_avail; 2228 2229 if (frames == 0) 2230 return 0; 2231 2232 snd_pcm_stream_lock_irq(substream); 2233 switch (runtime->status->state) { 2234 case SNDRV_PCM_STATE_PREPARED: 2235 case SNDRV_PCM_STATE_DRAINING: 2236 break; 2237 case SNDRV_PCM_STATE_RUNNING: 2238 if (snd_pcm_update_hw_ptr(substream) >= 0) 2239 break; 2240 /* Fall through */ 2241 case SNDRV_PCM_STATE_XRUN: 2242 ret = -EPIPE; 2243 goto __end; 2244 case SNDRV_PCM_STATE_SUSPENDED: 2245 ret = -ESTRPIPE; 2246 goto __end; 2247 default: 2248 ret = -EBADFD; 2249 goto __end; 2250 } 2251 2252 hw_avail = snd_pcm_capture_hw_avail(runtime); 2253 if (hw_avail <= 0) { 2254 ret = 0; 2255 goto __end; 2256 } 2257 if (frames > (snd_pcm_uframes_t)hw_avail) 2258 frames = hw_avail; 2259 appl_ptr = runtime->control->appl_ptr - frames; 2260 if (appl_ptr < 0) 2261 appl_ptr += runtime->boundary; 2262 runtime->control->appl_ptr = appl_ptr; 2263 ret = frames; 2264 __end: 2265 snd_pcm_stream_unlock_irq(substream); 2266 return ret; 2267 } 2268 2269 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream, 2270 snd_pcm_uframes_t frames) 2271 { 2272 struct snd_pcm_runtime *runtime = substream->runtime; 2273 snd_pcm_sframes_t appl_ptr; 2274 snd_pcm_sframes_t ret; 2275 snd_pcm_sframes_t avail; 2276 2277 if (frames == 0) 2278 return 0; 2279 2280 snd_pcm_stream_lock_irq(substream); 2281 switch (runtime->status->state) { 2282 case SNDRV_PCM_STATE_PREPARED: 2283 case SNDRV_PCM_STATE_PAUSED: 2284 break; 2285 case SNDRV_PCM_STATE_DRAINING: 2286 case SNDRV_PCM_STATE_RUNNING: 2287 if (snd_pcm_update_hw_ptr(substream) >= 0) 2288 break; 2289 /* Fall through */ 2290 case SNDRV_PCM_STATE_XRUN: 2291 ret = -EPIPE; 2292 goto __end; 2293 case SNDRV_PCM_STATE_SUSPENDED: 2294 ret = -ESTRPIPE; 2295 goto __end; 2296 default: 2297 ret = -EBADFD; 2298 goto __end; 2299 } 2300 2301 avail = snd_pcm_playback_avail(runtime); 2302 if (avail <= 0) { 2303 ret = 0; 2304 goto __end; 2305 } 2306 if (frames > (snd_pcm_uframes_t)avail) 2307 frames = avail; 2308 appl_ptr = runtime->control->appl_ptr + frames; 2309 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) 2310 appl_ptr -= runtime->boundary; 2311 runtime->control->appl_ptr = appl_ptr; 2312 ret = frames; 2313 __end: 2314 snd_pcm_stream_unlock_irq(substream); 2315 return ret; 2316 } 2317 2318 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream, 2319 snd_pcm_uframes_t frames) 2320 { 2321 struct snd_pcm_runtime *runtime = substream->runtime; 2322 snd_pcm_sframes_t appl_ptr; 2323 snd_pcm_sframes_t ret; 2324 snd_pcm_sframes_t avail; 2325 2326 if (frames == 0) 2327 return 0; 2328 2329 snd_pcm_stream_lock_irq(substream); 2330 switch (runtime->status->state) { 2331 case SNDRV_PCM_STATE_PREPARED: 2332 case SNDRV_PCM_STATE_DRAINING: 2333 case SNDRV_PCM_STATE_PAUSED: 2334 break; 2335 case SNDRV_PCM_STATE_RUNNING: 2336 if (snd_pcm_update_hw_ptr(substream) >= 0) 2337 break; 2338 /* Fall through */ 2339 case SNDRV_PCM_STATE_XRUN: 2340 ret = -EPIPE; 2341 goto __end; 2342 case SNDRV_PCM_STATE_SUSPENDED: 2343 ret = -ESTRPIPE; 2344 goto __end; 2345 default: 2346 ret = -EBADFD; 2347 goto __end; 2348 } 2349 2350 avail = snd_pcm_capture_avail(runtime); 2351 if (avail <= 0) { 2352 ret = 0; 2353 goto __end; 2354 } 2355 if (frames > (snd_pcm_uframes_t)avail) 2356 frames = avail; 2357 appl_ptr = runtime->control->appl_ptr + frames; 2358 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) 2359 appl_ptr -= runtime->boundary; 2360 runtime->control->appl_ptr = appl_ptr; 2361 ret = frames; 2362 __end: 2363 snd_pcm_stream_unlock_irq(substream); 2364 return ret; 2365 } 2366 2367 static int snd_pcm_hwsync(struct snd_pcm_substream *substream) 2368 { 2369 struct snd_pcm_runtime *runtime = substream->runtime; 2370 int err; 2371 2372 snd_pcm_stream_lock_irq(substream); 2373 switch (runtime->status->state) { 2374 case SNDRV_PCM_STATE_DRAINING: 2375 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 2376 goto __badfd; 2377 case SNDRV_PCM_STATE_RUNNING: 2378 if ((err = snd_pcm_update_hw_ptr(substream)) < 0) 2379 break; 2380 /* Fall through */ 2381 case SNDRV_PCM_STATE_PREPARED: 2382 case SNDRV_PCM_STATE_SUSPENDED: 2383 err = 0; 2384 break; 2385 case SNDRV_PCM_STATE_XRUN: 2386 err = -EPIPE; 2387 break; 2388 default: 2389 __badfd: 2390 err = -EBADFD; 2391 break; 2392 } 2393 snd_pcm_stream_unlock_irq(substream); 2394 return err; 2395 } 2396 2397 static int snd_pcm_delay(struct snd_pcm_substream *substream, 2398 snd_pcm_sframes_t __user *res) 2399 { 2400 struct snd_pcm_runtime *runtime = substream->runtime; 2401 int err; 2402 snd_pcm_sframes_t n = 0; 2403 2404 snd_pcm_stream_lock_irq(substream); 2405 switch (runtime->status->state) { 2406 case SNDRV_PCM_STATE_DRAINING: 2407 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 2408 goto __badfd; 2409 case SNDRV_PCM_STATE_RUNNING: 2410 if ((err = snd_pcm_update_hw_ptr(substream)) < 0) 2411 break; 2412 /* Fall through */ 2413 case SNDRV_PCM_STATE_PREPARED: 2414 case SNDRV_PCM_STATE_SUSPENDED: 2415 err = 0; 2416 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2417 n = snd_pcm_playback_hw_avail(runtime); 2418 else 2419 n = snd_pcm_capture_avail(runtime); 2420 n += runtime->delay; 2421 break; 2422 case SNDRV_PCM_STATE_XRUN: 2423 err = -EPIPE; 2424 break; 2425 default: 2426 __badfd: 2427 err = -EBADFD; 2428 break; 2429 } 2430 snd_pcm_stream_unlock_irq(substream); 2431 if (!err) 2432 if (put_user(n, res)) 2433 err = -EFAULT; 2434 return err; 2435 } 2436 2437 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream, 2438 struct snd_pcm_sync_ptr __user *_sync_ptr) 2439 { 2440 struct snd_pcm_runtime *runtime = substream->runtime; 2441 struct snd_pcm_sync_ptr sync_ptr; 2442 volatile struct snd_pcm_mmap_status *status; 2443 volatile struct snd_pcm_mmap_control *control; 2444 int err; 2445 2446 memset(&sync_ptr, 0, sizeof(sync_ptr)); 2447 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags))) 2448 return -EFAULT; 2449 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control))) 2450 return -EFAULT; 2451 status = runtime->status; 2452 control = runtime->control; 2453 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) { 2454 err = snd_pcm_hwsync(substream); 2455 if (err < 0) 2456 return err; 2457 } 2458 snd_pcm_stream_lock_irq(substream); 2459 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) 2460 control->appl_ptr = sync_ptr.c.control.appl_ptr; 2461 else 2462 sync_ptr.c.control.appl_ptr = control->appl_ptr; 2463 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) 2464 control->avail_min = sync_ptr.c.control.avail_min; 2465 else 2466 sync_ptr.c.control.avail_min = control->avail_min; 2467 sync_ptr.s.status.state = status->state; 2468 sync_ptr.s.status.hw_ptr = status->hw_ptr; 2469 sync_ptr.s.status.tstamp = status->tstamp; 2470 sync_ptr.s.status.suspended_state = status->suspended_state; 2471 snd_pcm_stream_unlock_irq(substream); 2472 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr))) 2473 return -EFAULT; 2474 return 0; 2475 } 2476 2477 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg) 2478 { 2479 struct snd_pcm_runtime *runtime = substream->runtime; 2480 int arg; 2481 2482 if (get_user(arg, _arg)) 2483 return -EFAULT; 2484 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST) 2485 return -EINVAL; 2486 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY; 2487 if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC) 2488 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC; 2489 return 0; 2490 } 2491 2492 static int snd_pcm_common_ioctl1(struct file *file, 2493 struct snd_pcm_substream *substream, 2494 unsigned int cmd, void __user *arg) 2495 { 2496 switch (cmd) { 2497 case SNDRV_PCM_IOCTL_PVERSION: 2498 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0; 2499 case SNDRV_PCM_IOCTL_INFO: 2500 return snd_pcm_info_user(substream, arg); 2501 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */ 2502 return 0; 2503 case SNDRV_PCM_IOCTL_TTSTAMP: 2504 return snd_pcm_tstamp(substream, arg); 2505 case SNDRV_PCM_IOCTL_HW_REFINE: 2506 return snd_pcm_hw_refine_user(substream, arg); 2507 case SNDRV_PCM_IOCTL_HW_PARAMS: 2508 return snd_pcm_hw_params_user(substream, arg); 2509 case SNDRV_PCM_IOCTL_HW_FREE: 2510 return snd_pcm_hw_free(substream); 2511 case SNDRV_PCM_IOCTL_SW_PARAMS: 2512 return snd_pcm_sw_params_user(substream, arg); 2513 case SNDRV_PCM_IOCTL_STATUS: 2514 return snd_pcm_status_user(substream, arg); 2515 case SNDRV_PCM_IOCTL_CHANNEL_INFO: 2516 return snd_pcm_channel_info_user(substream, arg); 2517 case SNDRV_PCM_IOCTL_PREPARE: 2518 return snd_pcm_prepare(substream, file); 2519 case SNDRV_PCM_IOCTL_RESET: 2520 return snd_pcm_reset(substream); 2521 case SNDRV_PCM_IOCTL_START: 2522 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING); 2523 case SNDRV_PCM_IOCTL_LINK: 2524 return snd_pcm_link(substream, (int)(unsigned long) arg); 2525 case SNDRV_PCM_IOCTL_UNLINK: 2526 return snd_pcm_unlink(substream); 2527 case SNDRV_PCM_IOCTL_RESUME: 2528 return snd_pcm_resume(substream); 2529 case SNDRV_PCM_IOCTL_XRUN: 2530 return snd_pcm_xrun(substream); 2531 case SNDRV_PCM_IOCTL_HWSYNC: 2532 return snd_pcm_hwsync(substream); 2533 case SNDRV_PCM_IOCTL_DELAY: 2534 return snd_pcm_delay(substream, arg); 2535 case SNDRV_PCM_IOCTL_SYNC_PTR: 2536 return snd_pcm_sync_ptr(substream, arg); 2537 #ifdef CONFIG_SND_SUPPORT_OLD_API 2538 case SNDRV_PCM_IOCTL_HW_REFINE_OLD: 2539 return snd_pcm_hw_refine_old_user(substream, arg); 2540 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD: 2541 return snd_pcm_hw_params_old_user(substream, arg); 2542 #endif 2543 case SNDRV_PCM_IOCTL_DRAIN: 2544 return snd_pcm_drain(substream, file); 2545 case SNDRV_PCM_IOCTL_DROP: 2546 return snd_pcm_drop(substream); 2547 case SNDRV_PCM_IOCTL_PAUSE: 2548 { 2549 int res; 2550 snd_pcm_stream_lock_irq(substream); 2551 res = snd_pcm_pause(substream, (int)(unsigned long)arg); 2552 snd_pcm_stream_unlock_irq(substream); 2553 return res; 2554 } 2555 } 2556 snd_printd("unknown ioctl = 0x%x\n", cmd); 2557 return -ENOTTY; 2558 } 2559 2560 static int snd_pcm_playback_ioctl1(struct file *file, 2561 struct snd_pcm_substream *substream, 2562 unsigned int cmd, void __user *arg) 2563 { 2564 if (snd_BUG_ON(!substream)) 2565 return -ENXIO; 2566 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) 2567 return -EINVAL; 2568 switch (cmd) { 2569 case SNDRV_PCM_IOCTL_WRITEI_FRAMES: 2570 { 2571 struct snd_xferi xferi; 2572 struct snd_xferi __user *_xferi = arg; 2573 struct snd_pcm_runtime *runtime = substream->runtime; 2574 snd_pcm_sframes_t result; 2575 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2576 return -EBADFD; 2577 if (put_user(0, &_xferi->result)) 2578 return -EFAULT; 2579 if (copy_from_user(&xferi, _xferi, sizeof(xferi))) 2580 return -EFAULT; 2581 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames); 2582 __put_user(result, &_xferi->result); 2583 return result < 0 ? result : 0; 2584 } 2585 case SNDRV_PCM_IOCTL_WRITEN_FRAMES: 2586 { 2587 struct snd_xfern xfern; 2588 struct snd_xfern __user *_xfern = arg; 2589 struct snd_pcm_runtime *runtime = substream->runtime; 2590 void __user **bufs; 2591 snd_pcm_sframes_t result; 2592 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2593 return -EBADFD; 2594 if (runtime->channels > 128) 2595 return -EINVAL; 2596 if (put_user(0, &_xfern->result)) 2597 return -EFAULT; 2598 if (copy_from_user(&xfern, _xfern, sizeof(xfern))) 2599 return -EFAULT; 2600 2601 bufs = memdup_user(xfern.bufs, 2602 sizeof(void *) * runtime->channels); 2603 if (IS_ERR(bufs)) 2604 return PTR_ERR(bufs); 2605 result = snd_pcm_lib_writev(substream, bufs, xfern.frames); 2606 kfree(bufs); 2607 __put_user(result, &_xfern->result); 2608 return result < 0 ? result : 0; 2609 } 2610 case SNDRV_PCM_IOCTL_REWIND: 2611 { 2612 snd_pcm_uframes_t frames; 2613 snd_pcm_uframes_t __user *_frames = arg; 2614 snd_pcm_sframes_t result; 2615 if (get_user(frames, _frames)) 2616 return -EFAULT; 2617 if (put_user(0, _frames)) 2618 return -EFAULT; 2619 result = snd_pcm_playback_rewind(substream, frames); 2620 __put_user(result, _frames); 2621 return result < 0 ? result : 0; 2622 } 2623 case SNDRV_PCM_IOCTL_FORWARD: 2624 { 2625 snd_pcm_uframes_t frames; 2626 snd_pcm_uframes_t __user *_frames = arg; 2627 snd_pcm_sframes_t result; 2628 if (get_user(frames, _frames)) 2629 return -EFAULT; 2630 if (put_user(0, _frames)) 2631 return -EFAULT; 2632 result = snd_pcm_playback_forward(substream, frames); 2633 __put_user(result, _frames); 2634 return result < 0 ? result : 0; 2635 } 2636 } 2637 return snd_pcm_common_ioctl1(file, substream, cmd, arg); 2638 } 2639 2640 static int snd_pcm_capture_ioctl1(struct file *file, 2641 struct snd_pcm_substream *substream, 2642 unsigned int cmd, void __user *arg) 2643 { 2644 if (snd_BUG_ON(!substream)) 2645 return -ENXIO; 2646 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE)) 2647 return -EINVAL; 2648 switch (cmd) { 2649 case SNDRV_PCM_IOCTL_READI_FRAMES: 2650 { 2651 struct snd_xferi xferi; 2652 struct snd_xferi __user *_xferi = arg; 2653 struct snd_pcm_runtime *runtime = substream->runtime; 2654 snd_pcm_sframes_t result; 2655 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2656 return -EBADFD; 2657 if (put_user(0, &_xferi->result)) 2658 return -EFAULT; 2659 if (copy_from_user(&xferi, _xferi, sizeof(xferi))) 2660 return -EFAULT; 2661 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames); 2662 __put_user(result, &_xferi->result); 2663 return result < 0 ? result : 0; 2664 } 2665 case SNDRV_PCM_IOCTL_READN_FRAMES: 2666 { 2667 struct snd_xfern xfern; 2668 struct snd_xfern __user *_xfern = arg; 2669 struct snd_pcm_runtime *runtime = substream->runtime; 2670 void *bufs; 2671 snd_pcm_sframes_t result; 2672 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2673 return -EBADFD; 2674 if (runtime->channels > 128) 2675 return -EINVAL; 2676 if (put_user(0, &_xfern->result)) 2677 return -EFAULT; 2678 if (copy_from_user(&xfern, _xfern, sizeof(xfern))) 2679 return -EFAULT; 2680 2681 bufs = memdup_user(xfern.bufs, 2682 sizeof(void *) * runtime->channels); 2683 if (IS_ERR(bufs)) 2684 return PTR_ERR(bufs); 2685 result = snd_pcm_lib_readv(substream, bufs, xfern.frames); 2686 kfree(bufs); 2687 __put_user(result, &_xfern->result); 2688 return result < 0 ? result : 0; 2689 } 2690 case SNDRV_PCM_IOCTL_REWIND: 2691 { 2692 snd_pcm_uframes_t frames; 2693 snd_pcm_uframes_t __user *_frames = arg; 2694 snd_pcm_sframes_t result; 2695 if (get_user(frames, _frames)) 2696 return -EFAULT; 2697 if (put_user(0, _frames)) 2698 return -EFAULT; 2699 result = snd_pcm_capture_rewind(substream, frames); 2700 __put_user(result, _frames); 2701 return result < 0 ? result : 0; 2702 } 2703 case SNDRV_PCM_IOCTL_FORWARD: 2704 { 2705 snd_pcm_uframes_t frames; 2706 snd_pcm_uframes_t __user *_frames = arg; 2707 snd_pcm_sframes_t result; 2708 if (get_user(frames, _frames)) 2709 return -EFAULT; 2710 if (put_user(0, _frames)) 2711 return -EFAULT; 2712 result = snd_pcm_capture_forward(substream, frames); 2713 __put_user(result, _frames); 2714 return result < 0 ? result : 0; 2715 } 2716 } 2717 return snd_pcm_common_ioctl1(file, substream, cmd, arg); 2718 } 2719 2720 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd, 2721 unsigned long arg) 2722 { 2723 struct snd_pcm_file *pcm_file; 2724 2725 pcm_file = file->private_data; 2726 2727 if (((cmd >> 8) & 0xff) != 'A') 2728 return -ENOTTY; 2729 2730 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd, 2731 (void __user *)arg); 2732 } 2733 2734 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd, 2735 unsigned long arg) 2736 { 2737 struct snd_pcm_file *pcm_file; 2738 2739 pcm_file = file->private_data; 2740 2741 if (((cmd >> 8) & 0xff) != 'A') 2742 return -ENOTTY; 2743 2744 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd, 2745 (void __user *)arg); 2746 } 2747 2748 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, 2749 unsigned int cmd, void *arg) 2750 { 2751 mm_segment_t fs; 2752 int result; 2753 2754 fs = snd_enter_user(); 2755 switch (substream->stream) { 2756 case SNDRV_PCM_STREAM_PLAYBACK: 2757 result = snd_pcm_playback_ioctl1(NULL, substream, cmd, 2758 (void __user *)arg); 2759 break; 2760 case SNDRV_PCM_STREAM_CAPTURE: 2761 result = snd_pcm_capture_ioctl1(NULL, substream, cmd, 2762 (void __user *)arg); 2763 break; 2764 default: 2765 result = -EINVAL; 2766 break; 2767 } 2768 snd_leave_user(fs); 2769 return result; 2770 } 2771 2772 EXPORT_SYMBOL(snd_pcm_kernel_ioctl); 2773 2774 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count, 2775 loff_t * offset) 2776 { 2777 struct snd_pcm_file *pcm_file; 2778 struct snd_pcm_substream *substream; 2779 struct snd_pcm_runtime *runtime; 2780 snd_pcm_sframes_t result; 2781 2782 pcm_file = file->private_data; 2783 substream = pcm_file->substream; 2784 if (PCM_RUNTIME_CHECK(substream)) 2785 return -ENXIO; 2786 runtime = substream->runtime; 2787 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2788 return -EBADFD; 2789 if (!frame_aligned(runtime, count)) 2790 return -EINVAL; 2791 count = bytes_to_frames(runtime, count); 2792 result = snd_pcm_lib_read(substream, buf, count); 2793 if (result > 0) 2794 result = frames_to_bytes(runtime, result); 2795 return result; 2796 } 2797 2798 static ssize_t snd_pcm_write(struct file *file, const char __user *buf, 2799 size_t count, loff_t * offset) 2800 { 2801 struct snd_pcm_file *pcm_file; 2802 struct snd_pcm_substream *substream; 2803 struct snd_pcm_runtime *runtime; 2804 snd_pcm_sframes_t result; 2805 2806 pcm_file = file->private_data; 2807 substream = pcm_file->substream; 2808 if (PCM_RUNTIME_CHECK(substream)) 2809 return -ENXIO; 2810 runtime = substream->runtime; 2811 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2812 return -EBADFD; 2813 if (!frame_aligned(runtime, count)) 2814 return -EINVAL; 2815 count = bytes_to_frames(runtime, count); 2816 result = snd_pcm_lib_write(substream, buf, count); 2817 if (result > 0) 2818 result = frames_to_bytes(runtime, result); 2819 return result; 2820 } 2821 2822 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov, 2823 unsigned long nr_segs, loff_t pos) 2824 2825 { 2826 struct snd_pcm_file *pcm_file; 2827 struct snd_pcm_substream *substream; 2828 struct snd_pcm_runtime *runtime; 2829 snd_pcm_sframes_t result; 2830 unsigned long i; 2831 void __user **bufs; 2832 snd_pcm_uframes_t frames; 2833 2834 pcm_file = iocb->ki_filp->private_data; 2835 substream = pcm_file->substream; 2836 if (PCM_RUNTIME_CHECK(substream)) 2837 return -ENXIO; 2838 runtime = substream->runtime; 2839 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2840 return -EBADFD; 2841 if (nr_segs > 1024 || nr_segs != runtime->channels) 2842 return -EINVAL; 2843 if (!frame_aligned(runtime, iov->iov_len)) 2844 return -EINVAL; 2845 frames = bytes_to_samples(runtime, iov->iov_len); 2846 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL); 2847 if (bufs == NULL) 2848 return -ENOMEM; 2849 for (i = 0; i < nr_segs; ++i) 2850 bufs[i] = iov[i].iov_base; 2851 result = snd_pcm_lib_readv(substream, bufs, frames); 2852 if (result > 0) 2853 result = frames_to_bytes(runtime, result); 2854 kfree(bufs); 2855 return result; 2856 } 2857 2858 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov, 2859 unsigned long nr_segs, loff_t pos) 2860 { 2861 struct snd_pcm_file *pcm_file; 2862 struct snd_pcm_substream *substream; 2863 struct snd_pcm_runtime *runtime; 2864 snd_pcm_sframes_t result; 2865 unsigned long i; 2866 void __user **bufs; 2867 snd_pcm_uframes_t frames; 2868 2869 pcm_file = iocb->ki_filp->private_data; 2870 substream = pcm_file->substream; 2871 if (PCM_RUNTIME_CHECK(substream)) 2872 return -ENXIO; 2873 runtime = substream->runtime; 2874 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2875 return -EBADFD; 2876 if (nr_segs > 128 || nr_segs != runtime->channels || 2877 !frame_aligned(runtime, iov->iov_len)) 2878 return -EINVAL; 2879 frames = bytes_to_samples(runtime, iov->iov_len); 2880 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL); 2881 if (bufs == NULL) 2882 return -ENOMEM; 2883 for (i = 0; i < nr_segs; ++i) 2884 bufs[i] = iov[i].iov_base; 2885 result = snd_pcm_lib_writev(substream, bufs, frames); 2886 if (result > 0) 2887 result = frames_to_bytes(runtime, result); 2888 kfree(bufs); 2889 return result; 2890 } 2891 2892 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait) 2893 { 2894 struct snd_pcm_file *pcm_file; 2895 struct snd_pcm_substream *substream; 2896 struct snd_pcm_runtime *runtime; 2897 unsigned int mask; 2898 snd_pcm_uframes_t avail; 2899 2900 pcm_file = file->private_data; 2901 2902 substream = pcm_file->substream; 2903 if (PCM_RUNTIME_CHECK(substream)) 2904 return -ENXIO; 2905 runtime = substream->runtime; 2906 2907 poll_wait(file, &runtime->sleep, wait); 2908 2909 snd_pcm_stream_lock_irq(substream); 2910 avail = snd_pcm_playback_avail(runtime); 2911 switch (runtime->status->state) { 2912 case SNDRV_PCM_STATE_RUNNING: 2913 case SNDRV_PCM_STATE_PREPARED: 2914 case SNDRV_PCM_STATE_PAUSED: 2915 if (avail >= runtime->control->avail_min) { 2916 mask = POLLOUT | POLLWRNORM; 2917 break; 2918 } 2919 /* Fall through */ 2920 case SNDRV_PCM_STATE_DRAINING: 2921 mask = 0; 2922 break; 2923 default: 2924 mask = POLLOUT | POLLWRNORM | POLLERR; 2925 break; 2926 } 2927 snd_pcm_stream_unlock_irq(substream); 2928 return mask; 2929 } 2930 2931 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait) 2932 { 2933 struct snd_pcm_file *pcm_file; 2934 struct snd_pcm_substream *substream; 2935 struct snd_pcm_runtime *runtime; 2936 unsigned int mask; 2937 snd_pcm_uframes_t avail; 2938 2939 pcm_file = file->private_data; 2940 2941 substream = pcm_file->substream; 2942 if (PCM_RUNTIME_CHECK(substream)) 2943 return -ENXIO; 2944 runtime = substream->runtime; 2945 2946 poll_wait(file, &runtime->sleep, wait); 2947 2948 snd_pcm_stream_lock_irq(substream); 2949 avail = snd_pcm_capture_avail(runtime); 2950 switch (runtime->status->state) { 2951 case SNDRV_PCM_STATE_RUNNING: 2952 case SNDRV_PCM_STATE_PREPARED: 2953 case SNDRV_PCM_STATE_PAUSED: 2954 if (avail >= runtime->control->avail_min) { 2955 mask = POLLIN | POLLRDNORM; 2956 break; 2957 } 2958 mask = 0; 2959 break; 2960 case SNDRV_PCM_STATE_DRAINING: 2961 if (avail > 0) { 2962 mask = POLLIN | POLLRDNORM; 2963 break; 2964 } 2965 /* Fall through */ 2966 default: 2967 mask = POLLIN | POLLRDNORM | POLLERR; 2968 break; 2969 } 2970 snd_pcm_stream_unlock_irq(substream); 2971 return mask; 2972 } 2973 2974 /* 2975 * mmap support 2976 */ 2977 2978 /* 2979 * Only on coherent architectures, we can mmap the status and the control records 2980 * for effcient data transfer. On others, we have to use HWSYNC ioctl... 2981 */ 2982 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) 2983 /* 2984 * mmap status record 2985 */ 2986 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area, 2987 struct vm_fault *vmf) 2988 { 2989 struct snd_pcm_substream *substream = area->vm_private_data; 2990 struct snd_pcm_runtime *runtime; 2991 2992 if (substream == NULL) 2993 return VM_FAULT_SIGBUS; 2994 runtime = substream->runtime; 2995 vmf->page = virt_to_page(runtime->status); 2996 get_page(vmf->page); 2997 return 0; 2998 } 2999 3000 static const struct vm_operations_struct snd_pcm_vm_ops_status = 3001 { 3002 .fault = snd_pcm_mmap_status_fault, 3003 }; 3004 3005 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, 3006 struct vm_area_struct *area) 3007 { 3008 struct snd_pcm_runtime *runtime; 3009 long size; 3010 if (!(area->vm_flags & VM_READ)) 3011 return -EINVAL; 3012 runtime = substream->runtime; 3013 size = area->vm_end - area->vm_start; 3014 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))) 3015 return -EINVAL; 3016 area->vm_ops = &snd_pcm_vm_ops_status; 3017 area->vm_private_data = substream; 3018 area->vm_flags |= VM_RESERVED; 3019 return 0; 3020 } 3021 3022 /* 3023 * mmap control record 3024 */ 3025 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area, 3026 struct vm_fault *vmf) 3027 { 3028 struct snd_pcm_substream *substream = area->vm_private_data; 3029 struct snd_pcm_runtime *runtime; 3030 3031 if (substream == NULL) 3032 return VM_FAULT_SIGBUS; 3033 runtime = substream->runtime; 3034 vmf->page = virt_to_page(runtime->control); 3035 get_page(vmf->page); 3036 return 0; 3037 } 3038 3039 static const struct vm_operations_struct snd_pcm_vm_ops_control = 3040 { 3041 .fault = snd_pcm_mmap_control_fault, 3042 }; 3043 3044 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, 3045 struct vm_area_struct *area) 3046 { 3047 struct snd_pcm_runtime *runtime; 3048 long size; 3049 if (!(area->vm_flags & VM_READ)) 3050 return -EINVAL; 3051 runtime = substream->runtime; 3052 size = area->vm_end - area->vm_start; 3053 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))) 3054 return -EINVAL; 3055 area->vm_ops = &snd_pcm_vm_ops_control; 3056 area->vm_private_data = substream; 3057 area->vm_flags |= VM_RESERVED; 3058 return 0; 3059 } 3060 #else /* ! coherent mmap */ 3061 /* 3062 * don't support mmap for status and control records. 3063 */ 3064 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, 3065 struct vm_area_struct *area) 3066 { 3067 return -ENXIO; 3068 } 3069 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, 3070 struct vm_area_struct *area) 3071 { 3072 return -ENXIO; 3073 } 3074 #endif /* coherent mmap */ 3075 3076 static inline struct page * 3077 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs) 3078 { 3079 void *vaddr = substream->runtime->dma_area + ofs; 3080 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT) 3081 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) 3082 return virt_to_page(CAC_ADDR(vaddr)); 3083 #endif 3084 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE) 3085 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) { 3086 dma_addr_t addr = substream->runtime->dma_addr + ofs; 3087 addr -= get_dma_offset(substream->dma_buffer.dev.dev); 3088 /* assume dma_handle set via pfn_to_phys() in 3089 * mm/dma-noncoherent.c 3090 */ 3091 return pfn_to_page(addr >> PAGE_SHIFT); 3092 } 3093 #endif 3094 return virt_to_page(vaddr); 3095 } 3096 3097 /* 3098 * fault callback for mmapping a RAM page 3099 */ 3100 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area, 3101 struct vm_fault *vmf) 3102 { 3103 struct snd_pcm_substream *substream = area->vm_private_data; 3104 struct snd_pcm_runtime *runtime; 3105 unsigned long offset; 3106 struct page * page; 3107 size_t dma_bytes; 3108 3109 if (substream == NULL) 3110 return VM_FAULT_SIGBUS; 3111 runtime = substream->runtime; 3112 offset = vmf->pgoff << PAGE_SHIFT; 3113 dma_bytes = PAGE_ALIGN(runtime->dma_bytes); 3114 if (offset > dma_bytes - PAGE_SIZE) 3115 return VM_FAULT_SIGBUS; 3116 if (substream->ops->page) 3117 page = substream->ops->page(substream, offset); 3118 else 3119 page = snd_pcm_default_page_ops(substream, offset); 3120 if (!page) 3121 return VM_FAULT_SIGBUS; 3122 get_page(page); 3123 vmf->page = page; 3124 return 0; 3125 } 3126 3127 static const struct vm_operations_struct snd_pcm_vm_ops_data = { 3128 .open = snd_pcm_mmap_data_open, 3129 .close = snd_pcm_mmap_data_close, 3130 }; 3131 3132 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = { 3133 .open = snd_pcm_mmap_data_open, 3134 .close = snd_pcm_mmap_data_close, 3135 .fault = snd_pcm_mmap_data_fault, 3136 }; 3137 3138 #ifndef ARCH_HAS_DMA_MMAP_COHERENT 3139 /* This should be defined / handled globally! */ 3140 #ifdef CONFIG_ARM 3141 #define ARCH_HAS_DMA_MMAP_COHERENT 3142 #endif 3143 #endif 3144 3145 /* 3146 * mmap the DMA buffer on RAM 3147 */ 3148 static int snd_pcm_default_mmap(struct snd_pcm_substream *substream, 3149 struct vm_area_struct *area) 3150 { 3151 area->vm_flags |= VM_RESERVED; 3152 #ifdef ARCH_HAS_DMA_MMAP_COHERENT 3153 if (!substream->ops->page && 3154 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) 3155 return dma_mmap_coherent(substream->dma_buffer.dev.dev, 3156 area, 3157 substream->runtime->dma_area, 3158 substream->runtime->dma_addr, 3159 area->vm_end - area->vm_start); 3160 #elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT) 3161 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV && 3162 !plat_device_is_coherent(substream->dma_buffer.dev.dev)) 3163 area->vm_page_prot = pgprot_noncached(area->vm_page_prot); 3164 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */ 3165 /* mmap with fault handler */ 3166 area->vm_ops = &snd_pcm_vm_ops_data_fault; 3167 return 0; 3168 } 3169 3170 /* 3171 * mmap the DMA buffer on I/O memory area 3172 */ 3173 #if SNDRV_PCM_INFO_MMAP_IOMEM 3174 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, 3175 struct vm_area_struct *area) 3176 { 3177 long size; 3178 unsigned long offset; 3179 3180 area->vm_page_prot = pgprot_noncached(area->vm_page_prot); 3181 area->vm_flags |= VM_IO; 3182 size = area->vm_end - area->vm_start; 3183 offset = area->vm_pgoff << PAGE_SHIFT; 3184 if (io_remap_pfn_range(area, area->vm_start, 3185 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT, 3186 size, area->vm_page_prot)) 3187 return -EAGAIN; 3188 return 0; 3189 } 3190 3191 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem); 3192 #endif /* SNDRV_PCM_INFO_MMAP */ 3193 3194 /* mmap callback with pgprot_noncached */ 3195 int snd_pcm_lib_mmap_noncached(struct snd_pcm_substream *substream, 3196 struct vm_area_struct *area) 3197 { 3198 area->vm_page_prot = pgprot_noncached(area->vm_page_prot); 3199 return snd_pcm_default_mmap(substream, area); 3200 } 3201 EXPORT_SYMBOL(snd_pcm_lib_mmap_noncached); 3202 3203 /* 3204 * mmap DMA buffer 3205 */ 3206 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, 3207 struct vm_area_struct *area) 3208 { 3209 struct snd_pcm_runtime *runtime; 3210 long size; 3211 unsigned long offset; 3212 size_t dma_bytes; 3213 int err; 3214 3215 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 3216 if (!(area->vm_flags & (VM_WRITE|VM_READ))) 3217 return -EINVAL; 3218 } else { 3219 if (!(area->vm_flags & VM_READ)) 3220 return -EINVAL; 3221 } 3222 runtime = substream->runtime; 3223 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 3224 return -EBADFD; 3225 if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) 3226 return -ENXIO; 3227 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || 3228 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) 3229 return -EINVAL; 3230 size = area->vm_end - area->vm_start; 3231 offset = area->vm_pgoff << PAGE_SHIFT; 3232 dma_bytes = PAGE_ALIGN(runtime->dma_bytes); 3233 if ((size_t)size > dma_bytes) 3234 return -EINVAL; 3235 if (offset > dma_bytes - size) 3236 return -EINVAL; 3237 3238 area->vm_ops = &snd_pcm_vm_ops_data; 3239 area->vm_private_data = substream; 3240 if (substream->ops->mmap) 3241 err = substream->ops->mmap(substream, area); 3242 else 3243 err = snd_pcm_default_mmap(substream, area); 3244 if (!err) 3245 atomic_inc(&substream->mmap_count); 3246 return err; 3247 } 3248 3249 EXPORT_SYMBOL(snd_pcm_mmap_data); 3250 3251 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area) 3252 { 3253 struct snd_pcm_file * pcm_file; 3254 struct snd_pcm_substream *substream; 3255 unsigned long offset; 3256 3257 pcm_file = file->private_data; 3258 substream = pcm_file->substream; 3259 if (PCM_RUNTIME_CHECK(substream)) 3260 return -ENXIO; 3261 3262 offset = area->vm_pgoff << PAGE_SHIFT; 3263 switch (offset) { 3264 case SNDRV_PCM_MMAP_OFFSET_STATUS: 3265 if (pcm_file->no_compat_mmap) 3266 return -ENXIO; 3267 return snd_pcm_mmap_status(substream, file, area); 3268 case SNDRV_PCM_MMAP_OFFSET_CONTROL: 3269 if (pcm_file->no_compat_mmap) 3270 return -ENXIO; 3271 return snd_pcm_mmap_control(substream, file, area); 3272 default: 3273 return snd_pcm_mmap_data(substream, file, area); 3274 } 3275 return 0; 3276 } 3277 3278 static int snd_pcm_fasync(int fd, struct file * file, int on) 3279 { 3280 struct snd_pcm_file * pcm_file; 3281 struct snd_pcm_substream *substream; 3282 struct snd_pcm_runtime *runtime; 3283 3284 pcm_file = file->private_data; 3285 substream = pcm_file->substream; 3286 if (PCM_RUNTIME_CHECK(substream)) 3287 return -ENXIO; 3288 runtime = substream->runtime; 3289 return fasync_helper(fd, file, on, &runtime->fasync); 3290 } 3291 3292 /* 3293 * ioctl32 compat 3294 */ 3295 #ifdef CONFIG_COMPAT 3296 #include "pcm_compat.c" 3297 #else 3298 #define snd_pcm_ioctl_compat NULL 3299 #endif 3300 3301 /* 3302 * To be removed helpers to keep binary compatibility 3303 */ 3304 3305 #ifdef CONFIG_SND_SUPPORT_OLD_API 3306 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5)) 3307 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5)) 3308 3309 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params, 3310 struct snd_pcm_hw_params_old *oparams) 3311 { 3312 unsigned int i; 3313 3314 memset(params, 0, sizeof(*params)); 3315 params->flags = oparams->flags; 3316 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) 3317 params->masks[i].bits[0] = oparams->masks[i]; 3318 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals)); 3319 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask); 3320 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask); 3321 params->info = oparams->info; 3322 params->msbits = oparams->msbits; 3323 params->rate_num = oparams->rate_num; 3324 params->rate_den = oparams->rate_den; 3325 params->fifo_size = oparams->fifo_size; 3326 } 3327 3328 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams, 3329 struct snd_pcm_hw_params *params) 3330 { 3331 unsigned int i; 3332 3333 memset(oparams, 0, sizeof(*oparams)); 3334 oparams->flags = params->flags; 3335 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) 3336 oparams->masks[i] = params->masks[i].bits[0]; 3337 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals)); 3338 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask); 3339 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask); 3340 oparams->info = params->info; 3341 oparams->msbits = params->msbits; 3342 oparams->rate_num = params->rate_num; 3343 oparams->rate_den = params->rate_den; 3344 oparams->fifo_size = params->fifo_size; 3345 } 3346 3347 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, 3348 struct snd_pcm_hw_params_old __user * _oparams) 3349 { 3350 struct snd_pcm_hw_params *params; 3351 struct snd_pcm_hw_params_old *oparams = NULL; 3352 int err; 3353 3354 params = kmalloc(sizeof(*params), GFP_KERNEL); 3355 if (!params) 3356 return -ENOMEM; 3357 3358 oparams = memdup_user(_oparams, sizeof(*oparams)); 3359 if (IS_ERR(oparams)) { 3360 err = PTR_ERR(oparams); 3361 goto out; 3362 } 3363 snd_pcm_hw_convert_from_old_params(params, oparams); 3364 err = snd_pcm_hw_refine(substream, params); 3365 snd_pcm_hw_convert_to_old_params(oparams, params); 3366 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { 3367 if (!err) 3368 err = -EFAULT; 3369 } 3370 3371 kfree(oparams); 3372 out: 3373 kfree(params); 3374 return err; 3375 } 3376 3377 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, 3378 struct snd_pcm_hw_params_old __user * _oparams) 3379 { 3380 struct snd_pcm_hw_params *params; 3381 struct snd_pcm_hw_params_old *oparams = NULL; 3382 int err; 3383 3384 params = kmalloc(sizeof(*params), GFP_KERNEL); 3385 if (!params) 3386 return -ENOMEM; 3387 3388 oparams = memdup_user(_oparams, sizeof(*oparams)); 3389 if (IS_ERR(oparams)) { 3390 err = PTR_ERR(oparams); 3391 goto out; 3392 } 3393 snd_pcm_hw_convert_from_old_params(params, oparams); 3394 err = snd_pcm_hw_params(substream, params); 3395 snd_pcm_hw_convert_to_old_params(oparams, params); 3396 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { 3397 if (!err) 3398 err = -EFAULT; 3399 } 3400 3401 kfree(oparams); 3402 out: 3403 kfree(params); 3404 return err; 3405 } 3406 #endif /* CONFIG_SND_SUPPORT_OLD_API */ 3407 3408 #ifndef CONFIG_MMU 3409 static unsigned long snd_pcm_get_unmapped_area(struct file *file, 3410 unsigned long addr, 3411 unsigned long len, 3412 unsigned long pgoff, 3413 unsigned long flags) 3414 { 3415 struct snd_pcm_file *pcm_file = file->private_data; 3416 struct snd_pcm_substream *substream = pcm_file->substream; 3417 struct snd_pcm_runtime *runtime = substream->runtime; 3418 unsigned long offset = pgoff << PAGE_SHIFT; 3419 3420 switch (offset) { 3421 case SNDRV_PCM_MMAP_OFFSET_STATUS: 3422 return (unsigned long)runtime->status; 3423 case SNDRV_PCM_MMAP_OFFSET_CONTROL: 3424 return (unsigned long)runtime->control; 3425 default: 3426 return (unsigned long)runtime->dma_area + offset; 3427 } 3428 } 3429 #else 3430 # define snd_pcm_get_unmapped_area NULL 3431 #endif 3432 3433 /* 3434 * Register section 3435 */ 3436 3437 const struct file_operations snd_pcm_f_ops[2] = { 3438 { 3439 .owner = THIS_MODULE, 3440 .write = snd_pcm_write, 3441 .aio_write = snd_pcm_aio_write, 3442 .open = snd_pcm_playback_open, 3443 .release = snd_pcm_release, 3444 .llseek = no_llseek, 3445 .poll = snd_pcm_playback_poll, 3446 .unlocked_ioctl = snd_pcm_playback_ioctl, 3447 .compat_ioctl = snd_pcm_ioctl_compat, 3448 .mmap = snd_pcm_mmap, 3449 .fasync = snd_pcm_fasync, 3450 .get_unmapped_area = snd_pcm_get_unmapped_area, 3451 }, 3452 { 3453 .owner = THIS_MODULE, 3454 .read = snd_pcm_read, 3455 .aio_read = snd_pcm_aio_read, 3456 .open = snd_pcm_capture_open, 3457 .release = snd_pcm_release, 3458 .llseek = no_llseek, 3459 .poll = snd_pcm_capture_poll, 3460 .unlocked_ioctl = snd_pcm_capture_ioctl, 3461 .compat_ioctl = snd_pcm_ioctl_compat, 3462 .mmap = snd_pcm_mmap, 3463 .fasync = snd_pcm_fasync, 3464 .get_unmapped_area = snd_pcm_get_unmapped_area, 3465 } 3466 }; 3467