1 /* 2 * Digital Audio (PCM) abstract layer 3 * Copyright (c) by Jaroslav Kysela <perex@suse.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 <sound/driver.h> 23 #include <linux/mm.h> 24 #include <linux/smp_lock.h> 25 #include <linux/file.h> 26 #include <linux/slab.h> 27 #include <linux/time.h> 28 #include <linux/uio.h> 29 #include <sound/core.h> 30 #include <sound/control.h> 31 #include <sound/info.h> 32 #include <sound/pcm.h> 33 #include <sound/pcm_params.h> 34 #include <sound/timer.h> 35 #include <sound/minors.h> 36 #include <asm/io.h> 37 38 /* 39 * Compatibility 40 */ 41 42 struct snd_pcm_hw_params_old { 43 unsigned int flags; 44 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT - 45 SNDRV_PCM_HW_PARAM_ACCESS + 1]; 46 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME - 47 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1]; 48 unsigned int rmask; 49 unsigned int cmask; 50 unsigned int info; 51 unsigned int msbits; 52 unsigned int rate_num; 53 unsigned int rate_den; 54 snd_pcm_uframes_t fifo_size; 55 unsigned char reserved[64]; 56 }; 57 58 #ifdef CONFIG_SND_SUPPORT_OLD_API 59 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old) 60 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old) 61 62 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, 63 struct snd_pcm_hw_params_old __user * _oparams); 64 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, 65 struct snd_pcm_hw_params_old __user * _oparams); 66 #endif 67 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream); 68 69 /* 70 * 71 */ 72 73 DEFINE_RWLOCK(snd_pcm_link_rwlock); 74 EXPORT_SYMBOL(snd_pcm_link_rwlock); 75 76 static DECLARE_RWSEM(snd_pcm_link_rwsem); 77 78 static inline mm_segment_t snd_enter_user(void) 79 { 80 mm_segment_t fs = get_fs(); 81 set_fs(get_ds()); 82 return fs; 83 } 84 85 static inline void snd_leave_user(mm_segment_t fs) 86 { 87 set_fs(fs); 88 } 89 90 91 92 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info) 93 { 94 struct snd_pcm_runtime *runtime; 95 struct snd_pcm *pcm = substream->pcm; 96 struct snd_pcm_str *pstr = substream->pstr; 97 98 snd_assert(substream != NULL, return -ENXIO); 99 memset(info, 0, sizeof(*info)); 100 info->card = pcm->card->number; 101 info->device = pcm->device; 102 info->stream = substream->stream; 103 info->subdevice = substream->number; 104 strlcpy(info->id, pcm->id, sizeof(info->id)); 105 strlcpy(info->name, pcm->name, sizeof(info->name)); 106 info->dev_class = pcm->dev_class; 107 info->dev_subclass = pcm->dev_subclass; 108 info->subdevices_count = pstr->substream_count; 109 info->subdevices_avail = pstr->substream_count - pstr->substream_opened; 110 strlcpy(info->subname, substream->name, sizeof(info->subname)); 111 runtime = substream->runtime; 112 /* AB: FIXME!!! This is definitely nonsense */ 113 if (runtime) { 114 info->sync = runtime->sync; 115 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info); 116 } 117 return 0; 118 } 119 120 int snd_pcm_info_user(struct snd_pcm_substream *substream, 121 struct snd_pcm_info __user * _info) 122 { 123 struct snd_pcm_info *info; 124 int err; 125 126 info = kmalloc(sizeof(*info), GFP_KERNEL); 127 if (! info) 128 return -ENOMEM; 129 err = snd_pcm_info(substream, info); 130 if (err >= 0) { 131 if (copy_to_user(_info, info, sizeof(*info))) 132 err = -EFAULT; 133 } 134 kfree(info); 135 return err; 136 } 137 138 #undef RULES_DEBUG 139 140 #ifdef RULES_DEBUG 141 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v 142 char *snd_pcm_hw_param_names[] = { 143 HW_PARAM(ACCESS), 144 HW_PARAM(FORMAT), 145 HW_PARAM(SUBFORMAT), 146 HW_PARAM(SAMPLE_BITS), 147 HW_PARAM(FRAME_BITS), 148 HW_PARAM(CHANNELS), 149 HW_PARAM(RATE), 150 HW_PARAM(PERIOD_TIME), 151 HW_PARAM(PERIOD_SIZE), 152 HW_PARAM(PERIOD_BYTES), 153 HW_PARAM(PERIODS), 154 HW_PARAM(BUFFER_TIME), 155 HW_PARAM(BUFFER_SIZE), 156 HW_PARAM(BUFFER_BYTES), 157 HW_PARAM(TICK_TIME), 158 }; 159 #endif 160 161 int snd_pcm_hw_refine(struct snd_pcm_substream *substream, 162 struct snd_pcm_hw_params *params) 163 { 164 unsigned int k; 165 struct snd_pcm_hardware *hw; 166 struct snd_interval *i = NULL; 167 struct snd_mask *m = NULL; 168 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints; 169 unsigned int rstamps[constrs->rules_num]; 170 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1]; 171 unsigned int stamp = 2; 172 int changed, again; 173 174 params->info = 0; 175 params->fifo_size = 0; 176 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS)) 177 params->msbits = 0; 178 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) { 179 params->rate_num = 0; 180 params->rate_den = 0; 181 } 182 183 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { 184 m = hw_param_mask(params, k); 185 if (snd_mask_empty(m)) 186 return -EINVAL; 187 if (!(params->rmask & (1 << k))) 188 continue; 189 #ifdef RULES_DEBUG 190 printk("%s = ", snd_pcm_hw_param_names[k]); 191 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); 192 #endif 193 changed = snd_mask_refine(m, constrs_mask(constrs, k)); 194 #ifdef RULES_DEBUG 195 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); 196 #endif 197 if (changed) 198 params->cmask |= 1 << k; 199 if (changed < 0) 200 return changed; 201 } 202 203 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { 204 i = hw_param_interval(params, k); 205 if (snd_interval_empty(i)) 206 return -EINVAL; 207 if (!(params->rmask & (1 << k))) 208 continue; 209 #ifdef RULES_DEBUG 210 printk("%s = ", snd_pcm_hw_param_names[k]); 211 if (i->empty) 212 printk("empty"); 213 else 214 printk("%c%u %u%c", 215 i->openmin ? '(' : '[', i->min, 216 i->max, i->openmax ? ')' : ']'); 217 printk(" -> "); 218 #endif 219 changed = snd_interval_refine(i, constrs_interval(constrs, k)); 220 #ifdef RULES_DEBUG 221 if (i->empty) 222 printk("empty\n"); 223 else 224 printk("%c%u %u%c\n", 225 i->openmin ? '(' : '[', i->min, 226 i->max, i->openmax ? ')' : ']'); 227 #endif 228 if (changed) 229 params->cmask |= 1 << k; 230 if (changed < 0) 231 return changed; 232 } 233 234 for (k = 0; k < constrs->rules_num; k++) 235 rstamps[k] = 0; 236 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) 237 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0; 238 do { 239 again = 0; 240 for (k = 0; k < constrs->rules_num; k++) { 241 struct snd_pcm_hw_rule *r = &constrs->rules[k]; 242 unsigned int d; 243 int doit = 0; 244 if (r->cond && !(r->cond & params->flags)) 245 continue; 246 for (d = 0; r->deps[d] >= 0; d++) { 247 if (vstamps[r->deps[d]] > rstamps[k]) { 248 doit = 1; 249 break; 250 } 251 } 252 if (!doit) 253 continue; 254 #ifdef RULES_DEBUG 255 printk("Rule %d [%p]: ", k, r->func); 256 if (r->var >= 0) { 257 printk("%s = ", snd_pcm_hw_param_names[r->var]); 258 if (hw_is_mask(r->var)) { 259 m = hw_param_mask(params, r->var); 260 printk("%x", *m->bits); 261 } else { 262 i = hw_param_interval(params, r->var); 263 if (i->empty) 264 printk("empty"); 265 else 266 printk("%c%u %u%c", 267 i->openmin ? '(' : '[', i->min, 268 i->max, i->openmax ? ')' : ']'); 269 } 270 } 271 #endif 272 changed = r->func(params, r); 273 #ifdef RULES_DEBUG 274 if (r->var >= 0) { 275 printk(" -> "); 276 if (hw_is_mask(r->var)) 277 printk("%x", *m->bits); 278 else { 279 if (i->empty) 280 printk("empty"); 281 else 282 printk("%c%u %u%c", 283 i->openmin ? '(' : '[', i->min, 284 i->max, i->openmax ? ')' : ']'); 285 } 286 } 287 printk("\n"); 288 #endif 289 rstamps[k] = stamp; 290 if (changed && r->var >= 0) { 291 params->cmask |= (1 << r->var); 292 vstamps[r->var] = stamp; 293 again = 1; 294 } 295 if (changed < 0) 296 return changed; 297 stamp++; 298 } 299 } while (again); 300 if (!params->msbits) { 301 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); 302 if (snd_interval_single(i)) 303 params->msbits = snd_interval_value(i); 304 } 305 306 if (!params->rate_den) { 307 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); 308 if (snd_interval_single(i)) { 309 params->rate_num = snd_interval_value(i); 310 params->rate_den = 1; 311 } 312 } 313 314 hw = &substream->runtime->hw; 315 if (!params->info) 316 params->info = hw->info; 317 if (!params->fifo_size) 318 params->fifo_size = hw->fifo_size; 319 params->rmask = 0; 320 return 0; 321 } 322 323 EXPORT_SYMBOL(snd_pcm_hw_refine); 324 325 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream, 326 struct snd_pcm_hw_params __user * _params) 327 { 328 struct snd_pcm_hw_params *params; 329 int err; 330 331 params = kmalloc(sizeof(*params), GFP_KERNEL); 332 if (!params) { 333 err = -ENOMEM; 334 goto out; 335 } 336 if (copy_from_user(params, _params, sizeof(*params))) { 337 err = -EFAULT; 338 goto out; 339 } 340 err = snd_pcm_hw_refine(substream, params); 341 if (copy_to_user(_params, params, sizeof(*params))) { 342 if (!err) 343 err = -EFAULT; 344 } 345 out: 346 kfree(params); 347 return err; 348 } 349 350 static int snd_pcm_hw_params(struct snd_pcm_substream *substream, 351 struct snd_pcm_hw_params *params) 352 { 353 struct snd_pcm_runtime *runtime; 354 int err; 355 unsigned int bits; 356 snd_pcm_uframes_t frames; 357 358 snd_assert(substream != NULL, return -ENXIO); 359 runtime = substream->runtime; 360 snd_assert(runtime != NULL, return -ENXIO); 361 snd_pcm_stream_lock_irq(substream); 362 switch (runtime->status->state) { 363 case SNDRV_PCM_STATE_OPEN: 364 case SNDRV_PCM_STATE_SETUP: 365 case SNDRV_PCM_STATE_PREPARED: 366 break; 367 default: 368 snd_pcm_stream_unlock_irq(substream); 369 return -EBADFD; 370 } 371 snd_pcm_stream_unlock_irq(substream); 372 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 373 if (!substream->oss.oss) 374 #endif 375 if (atomic_read(&substream->mmap_count)) 376 return -EBADFD; 377 378 params->rmask = ~0U; 379 err = snd_pcm_hw_refine(substream, params); 380 if (err < 0) 381 goto _error; 382 383 err = snd_pcm_hw_params_choose(substream, params); 384 if (err < 0) 385 goto _error; 386 387 if (substream->ops->hw_params != NULL) { 388 err = substream->ops->hw_params(substream, params); 389 if (err < 0) 390 goto _error; 391 } 392 393 runtime->access = params_access(params); 394 runtime->format = params_format(params); 395 runtime->subformat = params_subformat(params); 396 runtime->channels = params_channels(params); 397 runtime->rate = params_rate(params); 398 runtime->period_size = params_period_size(params); 399 runtime->periods = params_periods(params); 400 runtime->buffer_size = params_buffer_size(params); 401 runtime->tick_time = params_tick_time(params); 402 runtime->info = params->info; 403 runtime->rate_num = params->rate_num; 404 runtime->rate_den = params->rate_den; 405 406 bits = snd_pcm_format_physical_width(runtime->format); 407 runtime->sample_bits = bits; 408 bits *= runtime->channels; 409 runtime->frame_bits = bits; 410 frames = 1; 411 while (bits % 8 != 0) { 412 bits *= 2; 413 frames *= 2; 414 } 415 runtime->byte_align = bits / 8; 416 runtime->min_align = frames; 417 418 /* Default sw params */ 419 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; 420 runtime->period_step = 1; 421 runtime->sleep_min = 0; 422 runtime->control->avail_min = runtime->period_size; 423 runtime->xfer_align = runtime->period_size; 424 runtime->start_threshold = 1; 425 runtime->stop_threshold = runtime->buffer_size; 426 runtime->silence_threshold = 0; 427 runtime->silence_size = 0; 428 runtime->boundary = runtime->buffer_size; 429 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size) 430 runtime->boundary *= 2; 431 432 snd_pcm_timer_resolution_change(substream); 433 runtime->status->state = SNDRV_PCM_STATE_SETUP; 434 return 0; 435 _error: 436 /* hardware might be unuseable from this time, 437 so we force application to retry to set 438 the correct hardware parameter settings */ 439 runtime->status->state = SNDRV_PCM_STATE_OPEN; 440 if (substream->ops->hw_free != NULL) 441 substream->ops->hw_free(substream); 442 return err; 443 } 444 445 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream, 446 struct snd_pcm_hw_params __user * _params) 447 { 448 struct snd_pcm_hw_params *params; 449 int err; 450 451 params = kmalloc(sizeof(*params), GFP_KERNEL); 452 if (!params) { 453 err = -ENOMEM; 454 goto out; 455 } 456 if (copy_from_user(params, _params, sizeof(*params))) { 457 err = -EFAULT; 458 goto out; 459 } 460 err = snd_pcm_hw_params(substream, params); 461 if (copy_to_user(_params, params, sizeof(*params))) { 462 if (!err) 463 err = -EFAULT; 464 } 465 out: 466 kfree(params); 467 return err; 468 } 469 470 static int snd_pcm_hw_free(struct snd_pcm_substream *substream) 471 { 472 struct snd_pcm_runtime *runtime; 473 int result = 0; 474 475 snd_assert(substream != NULL, return -ENXIO); 476 runtime = substream->runtime; 477 snd_assert(runtime != NULL, return -ENXIO); 478 snd_pcm_stream_lock_irq(substream); 479 switch (runtime->status->state) { 480 case SNDRV_PCM_STATE_SETUP: 481 case SNDRV_PCM_STATE_PREPARED: 482 break; 483 default: 484 snd_pcm_stream_unlock_irq(substream); 485 return -EBADFD; 486 } 487 snd_pcm_stream_unlock_irq(substream); 488 if (atomic_read(&substream->mmap_count)) 489 return -EBADFD; 490 if (substream->ops->hw_free) 491 result = substream->ops->hw_free(substream); 492 runtime->status->state = SNDRV_PCM_STATE_OPEN; 493 return result; 494 } 495 496 static int snd_pcm_sw_params(struct snd_pcm_substream *substream, 497 struct snd_pcm_sw_params *params) 498 { 499 struct snd_pcm_runtime *runtime; 500 501 snd_assert(substream != NULL, return -ENXIO); 502 runtime = substream->runtime; 503 snd_assert(runtime != NULL, return -ENXIO); 504 snd_pcm_stream_lock_irq(substream); 505 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 506 snd_pcm_stream_unlock_irq(substream); 507 return -EBADFD; 508 } 509 snd_pcm_stream_unlock_irq(substream); 510 511 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST) 512 return -EINVAL; 513 if (params->avail_min == 0) 514 return -EINVAL; 515 if (params->xfer_align == 0 || 516 params->xfer_align % runtime->min_align != 0) 517 return -EINVAL; 518 if (params->silence_size >= runtime->boundary) { 519 if (params->silence_threshold != 0) 520 return -EINVAL; 521 } else { 522 if (params->silence_size > params->silence_threshold) 523 return -EINVAL; 524 if (params->silence_threshold > runtime->buffer_size) 525 return -EINVAL; 526 } 527 snd_pcm_stream_lock_irq(substream); 528 runtime->tstamp_mode = params->tstamp_mode; 529 runtime->sleep_min = params->sleep_min; 530 runtime->period_step = params->period_step; 531 runtime->control->avail_min = params->avail_min; 532 runtime->start_threshold = params->start_threshold; 533 runtime->stop_threshold = params->stop_threshold; 534 runtime->silence_threshold = params->silence_threshold; 535 runtime->silence_size = params->silence_size; 536 runtime->xfer_align = params->xfer_align; 537 params->boundary = runtime->boundary; 538 if (snd_pcm_running(substream)) { 539 if (runtime->sleep_min) 540 snd_pcm_tick_prepare(substream); 541 else 542 snd_pcm_tick_set(substream, 0); 543 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 544 runtime->silence_size > 0) 545 snd_pcm_playback_silence(substream, ULONG_MAX); 546 wake_up(&runtime->sleep); 547 } 548 snd_pcm_stream_unlock_irq(substream); 549 return 0; 550 } 551 552 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream, 553 struct snd_pcm_sw_params __user * _params) 554 { 555 struct snd_pcm_sw_params params; 556 int err; 557 if (copy_from_user(¶ms, _params, sizeof(params))) 558 return -EFAULT; 559 err = snd_pcm_sw_params(substream, ¶ms); 560 if (copy_to_user(_params, ¶ms, sizeof(params))) 561 return -EFAULT; 562 return err; 563 } 564 565 int snd_pcm_status(struct snd_pcm_substream *substream, 566 struct snd_pcm_status *status) 567 { 568 struct snd_pcm_runtime *runtime = substream->runtime; 569 570 snd_pcm_stream_lock_irq(substream); 571 status->state = runtime->status->state; 572 status->suspended_state = runtime->status->suspended_state; 573 if (status->state == SNDRV_PCM_STATE_OPEN) 574 goto _end; 575 status->trigger_tstamp = runtime->trigger_tstamp; 576 if (snd_pcm_running(substream)) { 577 snd_pcm_update_hw_ptr(substream); 578 if (runtime->tstamp_mode & SNDRV_PCM_TSTAMP_MMAP) 579 status->tstamp = runtime->status->tstamp; 580 else 581 getnstimeofday(&status->tstamp); 582 } else 583 getnstimeofday(&status->tstamp); 584 status->appl_ptr = runtime->control->appl_ptr; 585 status->hw_ptr = runtime->status->hw_ptr; 586 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 587 status->avail = snd_pcm_playback_avail(runtime); 588 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING || 589 runtime->status->state == SNDRV_PCM_STATE_DRAINING) 590 status->delay = runtime->buffer_size - status->avail; 591 else 592 status->delay = 0; 593 } else { 594 status->avail = snd_pcm_capture_avail(runtime); 595 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) 596 status->delay = status->avail; 597 else 598 status->delay = 0; 599 } 600 status->avail_max = runtime->avail_max; 601 status->overrange = runtime->overrange; 602 runtime->avail_max = 0; 603 runtime->overrange = 0; 604 _end: 605 snd_pcm_stream_unlock_irq(substream); 606 return 0; 607 } 608 609 static int snd_pcm_status_user(struct snd_pcm_substream *substream, 610 struct snd_pcm_status __user * _status) 611 { 612 struct snd_pcm_status status; 613 struct snd_pcm_runtime *runtime; 614 int res; 615 616 snd_assert(substream != NULL, return -ENXIO); 617 runtime = substream->runtime; 618 memset(&status, 0, sizeof(status)); 619 res = snd_pcm_status(substream, &status); 620 if (res < 0) 621 return res; 622 if (copy_to_user(_status, &status, sizeof(status))) 623 return -EFAULT; 624 return 0; 625 } 626 627 static int snd_pcm_channel_info(struct snd_pcm_substream *substream, 628 struct snd_pcm_channel_info * info) 629 { 630 struct snd_pcm_runtime *runtime; 631 unsigned int channel; 632 633 snd_assert(substream != NULL, return -ENXIO); 634 channel = info->channel; 635 runtime = substream->runtime; 636 snd_pcm_stream_lock_irq(substream); 637 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 638 snd_pcm_stream_unlock_irq(substream); 639 return -EBADFD; 640 } 641 snd_pcm_stream_unlock_irq(substream); 642 if (channel >= runtime->channels) 643 return -EINVAL; 644 memset(info, 0, sizeof(*info)); 645 info->channel = channel; 646 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info); 647 } 648 649 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream, 650 struct snd_pcm_channel_info __user * _info) 651 { 652 struct snd_pcm_channel_info info; 653 int res; 654 655 if (copy_from_user(&info, _info, sizeof(info))) 656 return -EFAULT; 657 res = snd_pcm_channel_info(substream, &info); 658 if (res < 0) 659 return res; 660 if (copy_to_user(_info, &info, sizeof(info))) 661 return -EFAULT; 662 return 0; 663 } 664 665 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream) 666 { 667 struct snd_pcm_runtime *runtime = substream->runtime; 668 if (runtime->trigger_master == NULL) 669 return; 670 if (runtime->trigger_master == substream) { 671 getnstimeofday(&runtime->trigger_tstamp); 672 } else { 673 snd_pcm_trigger_tstamp(runtime->trigger_master); 674 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp; 675 } 676 runtime->trigger_master = NULL; 677 } 678 679 struct action_ops { 680 int (*pre_action)(struct snd_pcm_substream *substream, int state); 681 int (*do_action)(struct snd_pcm_substream *substream, int state); 682 void (*undo_action)(struct snd_pcm_substream *substream, int state); 683 void (*post_action)(struct snd_pcm_substream *substream, int state); 684 }; 685 686 /* 687 * this functions is core for handling of linked stream 688 * Note: the stream state might be changed also on failure 689 * Note2: call with calling stream lock + link lock 690 */ 691 static int snd_pcm_action_group(struct action_ops *ops, 692 struct snd_pcm_substream *substream, 693 int state, int do_lock) 694 { 695 struct list_head *pos; 696 struct snd_pcm_substream *s = NULL; 697 struct snd_pcm_substream *s1; 698 int res = 0; 699 700 snd_pcm_group_for_each(pos, substream) { 701 s = snd_pcm_group_substream_entry(pos); 702 if (do_lock && s != substream) 703 spin_lock(&s->self_group.lock); 704 res = ops->pre_action(s, state); 705 if (res < 0) 706 goto _unlock; 707 } 708 snd_pcm_group_for_each(pos, substream) { 709 s = snd_pcm_group_substream_entry(pos); 710 res = ops->do_action(s, state); 711 if (res < 0) { 712 if (ops->undo_action) { 713 snd_pcm_group_for_each(pos, substream) { 714 s1 = snd_pcm_group_substream_entry(pos); 715 if (s1 == s) /* failed stream */ 716 break; 717 ops->undo_action(s1, state); 718 } 719 } 720 s = NULL; /* unlock all */ 721 goto _unlock; 722 } 723 } 724 snd_pcm_group_for_each(pos, substream) { 725 s = snd_pcm_group_substream_entry(pos); 726 ops->post_action(s, state); 727 } 728 _unlock: 729 if (do_lock) { 730 /* unlock streams */ 731 snd_pcm_group_for_each(pos, substream) { 732 s1 = snd_pcm_group_substream_entry(pos); 733 if (s1 != substream) 734 spin_unlock(&s1->self_group.lock); 735 if (s1 == s) /* end */ 736 break; 737 } 738 } 739 return res; 740 } 741 742 /* 743 * Note: call with stream lock 744 */ 745 static int snd_pcm_action_single(struct action_ops *ops, 746 struct snd_pcm_substream *substream, 747 int state) 748 { 749 int res; 750 751 res = ops->pre_action(substream, state); 752 if (res < 0) 753 return res; 754 res = ops->do_action(substream, state); 755 if (res == 0) 756 ops->post_action(substream, state); 757 else if (ops->undo_action) 758 ops->undo_action(substream, state); 759 return res; 760 } 761 762 /* 763 * Note: call with stream lock 764 */ 765 static int snd_pcm_action(struct action_ops *ops, 766 struct snd_pcm_substream *substream, 767 int state) 768 { 769 int res; 770 771 if (snd_pcm_stream_linked(substream)) { 772 if (!spin_trylock(&substream->group->lock)) { 773 spin_unlock(&substream->self_group.lock); 774 spin_lock(&substream->group->lock); 775 spin_lock(&substream->self_group.lock); 776 } 777 res = snd_pcm_action_group(ops, substream, state, 1); 778 spin_unlock(&substream->group->lock); 779 } else { 780 res = snd_pcm_action_single(ops, substream, state); 781 } 782 return res; 783 } 784 785 /* 786 * Note: don't use any locks before 787 */ 788 static int snd_pcm_action_lock_irq(struct action_ops *ops, 789 struct snd_pcm_substream *substream, 790 int state) 791 { 792 int res; 793 794 read_lock_irq(&snd_pcm_link_rwlock); 795 if (snd_pcm_stream_linked(substream)) { 796 spin_lock(&substream->group->lock); 797 spin_lock(&substream->self_group.lock); 798 res = snd_pcm_action_group(ops, substream, state, 1); 799 spin_unlock(&substream->self_group.lock); 800 spin_unlock(&substream->group->lock); 801 } else { 802 spin_lock(&substream->self_group.lock); 803 res = snd_pcm_action_single(ops, substream, state); 804 spin_unlock(&substream->self_group.lock); 805 } 806 read_unlock_irq(&snd_pcm_link_rwlock); 807 return res; 808 } 809 810 /* 811 */ 812 static int snd_pcm_action_nonatomic(struct action_ops *ops, 813 struct snd_pcm_substream *substream, 814 int state) 815 { 816 int res; 817 818 down_read(&snd_pcm_link_rwsem); 819 if (snd_pcm_stream_linked(substream)) 820 res = snd_pcm_action_group(ops, substream, state, 0); 821 else 822 res = snd_pcm_action_single(ops, substream, state); 823 up_read(&snd_pcm_link_rwsem); 824 return res; 825 } 826 827 /* 828 * start callbacks 829 */ 830 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state) 831 { 832 struct snd_pcm_runtime *runtime = substream->runtime; 833 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED) 834 return -EBADFD; 835 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 836 !snd_pcm_playback_data(substream)) 837 return -EPIPE; 838 runtime->trigger_master = substream; 839 return 0; 840 } 841 842 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state) 843 { 844 if (substream->runtime->trigger_master != substream) 845 return 0; 846 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START); 847 } 848 849 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state) 850 { 851 if (substream->runtime->trigger_master == substream) 852 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); 853 } 854 855 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state) 856 { 857 struct snd_pcm_runtime *runtime = substream->runtime; 858 snd_pcm_trigger_tstamp(substream); 859 runtime->status->state = state; 860 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 861 runtime->silence_size > 0) 862 snd_pcm_playback_silence(substream, ULONG_MAX); 863 if (runtime->sleep_min) 864 snd_pcm_tick_prepare(substream); 865 if (substream->timer) 866 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART, 867 &runtime->trigger_tstamp); 868 } 869 870 static struct action_ops snd_pcm_action_start = { 871 .pre_action = snd_pcm_pre_start, 872 .do_action = snd_pcm_do_start, 873 .undo_action = snd_pcm_undo_start, 874 .post_action = snd_pcm_post_start 875 }; 876 877 /** 878 * snd_pcm_start 879 * @substream: the PCM substream instance 880 * 881 * Start all linked streams. 882 */ 883 int snd_pcm_start(struct snd_pcm_substream *substream) 884 { 885 return snd_pcm_action(&snd_pcm_action_start, substream, 886 SNDRV_PCM_STATE_RUNNING); 887 } 888 889 /* 890 * stop callbacks 891 */ 892 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state) 893 { 894 struct snd_pcm_runtime *runtime = substream->runtime; 895 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 896 return -EBADFD; 897 runtime->trigger_master = substream; 898 return 0; 899 } 900 901 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state) 902 { 903 if (substream->runtime->trigger_master == substream && 904 snd_pcm_running(substream)) 905 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); 906 return 0; /* unconditonally stop all substreams */ 907 } 908 909 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state) 910 { 911 struct snd_pcm_runtime *runtime = substream->runtime; 912 if (runtime->status->state != state) { 913 snd_pcm_trigger_tstamp(substream); 914 if (substream->timer) 915 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP, 916 &runtime->trigger_tstamp); 917 runtime->status->state = state; 918 snd_pcm_tick_set(substream, 0); 919 } 920 wake_up(&runtime->sleep); 921 } 922 923 static struct action_ops snd_pcm_action_stop = { 924 .pre_action = snd_pcm_pre_stop, 925 .do_action = snd_pcm_do_stop, 926 .post_action = snd_pcm_post_stop 927 }; 928 929 /** 930 * snd_pcm_stop 931 * @substream: the PCM substream instance 932 * @state: PCM state after stopping the stream 933 * 934 * Try to stop all running streams in the substream group. 935 * The state of each stream is changed to the given value after that unconditionally. 936 */ 937 int snd_pcm_stop(struct snd_pcm_substream *substream, int state) 938 { 939 return snd_pcm_action(&snd_pcm_action_stop, substream, state); 940 } 941 942 EXPORT_SYMBOL(snd_pcm_stop); 943 944 /** 945 * snd_pcm_drain_done 946 * @substream: the PCM substream 947 * 948 * Stop the DMA only when the given stream is playback. 949 * The state is changed to SETUP. 950 * Unlike snd_pcm_stop(), this affects only the given stream. 951 */ 952 int snd_pcm_drain_done(struct snd_pcm_substream *substream) 953 { 954 return snd_pcm_action_single(&snd_pcm_action_stop, substream, 955 SNDRV_PCM_STATE_SETUP); 956 } 957 958 /* 959 * pause callbacks 960 */ 961 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push) 962 { 963 struct snd_pcm_runtime *runtime = substream->runtime; 964 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE)) 965 return -ENOSYS; 966 if (push) { 967 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING) 968 return -EBADFD; 969 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED) 970 return -EBADFD; 971 runtime->trigger_master = substream; 972 return 0; 973 } 974 975 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push) 976 { 977 if (substream->runtime->trigger_master != substream) 978 return 0; 979 return substream->ops->trigger(substream, 980 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH : 981 SNDRV_PCM_TRIGGER_PAUSE_RELEASE); 982 } 983 984 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push) 985 { 986 if (substream->runtime->trigger_master == substream) 987 substream->ops->trigger(substream, 988 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE : 989 SNDRV_PCM_TRIGGER_PAUSE_PUSH); 990 } 991 992 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push) 993 { 994 struct snd_pcm_runtime *runtime = substream->runtime; 995 snd_pcm_trigger_tstamp(substream); 996 if (push) { 997 runtime->status->state = SNDRV_PCM_STATE_PAUSED; 998 if (substream->timer) 999 snd_timer_notify(substream->timer, 1000 SNDRV_TIMER_EVENT_MPAUSE, 1001 &runtime->trigger_tstamp); 1002 snd_pcm_tick_set(substream, 0); 1003 wake_up(&runtime->sleep); 1004 } else { 1005 runtime->status->state = SNDRV_PCM_STATE_RUNNING; 1006 if (runtime->sleep_min) 1007 snd_pcm_tick_prepare(substream); 1008 if (substream->timer) 1009 snd_timer_notify(substream->timer, 1010 SNDRV_TIMER_EVENT_MCONTINUE, 1011 &runtime->trigger_tstamp); 1012 } 1013 } 1014 1015 static struct action_ops snd_pcm_action_pause = { 1016 .pre_action = snd_pcm_pre_pause, 1017 .do_action = snd_pcm_do_pause, 1018 .undo_action = snd_pcm_undo_pause, 1019 .post_action = snd_pcm_post_pause 1020 }; 1021 1022 /* 1023 * Push/release the pause for all linked streams. 1024 */ 1025 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push) 1026 { 1027 return snd_pcm_action(&snd_pcm_action_pause, substream, push); 1028 } 1029 1030 #ifdef CONFIG_PM 1031 /* suspend */ 1032 1033 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state) 1034 { 1035 struct snd_pcm_runtime *runtime = substream->runtime; 1036 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1037 return -EBUSY; 1038 runtime->trigger_master = substream; 1039 return 0; 1040 } 1041 1042 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state) 1043 { 1044 struct snd_pcm_runtime *runtime = substream->runtime; 1045 if (runtime->trigger_master != substream) 1046 return 0; 1047 if (! snd_pcm_running(substream)) 1048 return 0; 1049 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); 1050 return 0; /* suspend unconditionally */ 1051 } 1052 1053 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state) 1054 { 1055 struct snd_pcm_runtime *runtime = substream->runtime; 1056 snd_pcm_trigger_tstamp(substream); 1057 if (substream->timer) 1058 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND, 1059 &runtime->trigger_tstamp); 1060 runtime->status->suspended_state = runtime->status->state; 1061 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED; 1062 snd_pcm_tick_set(substream, 0); 1063 wake_up(&runtime->sleep); 1064 } 1065 1066 static struct action_ops snd_pcm_action_suspend = { 1067 .pre_action = snd_pcm_pre_suspend, 1068 .do_action = snd_pcm_do_suspend, 1069 .post_action = snd_pcm_post_suspend 1070 }; 1071 1072 /** 1073 * snd_pcm_suspend 1074 * @substream: the PCM substream 1075 * 1076 * Trigger SUSPEND to all linked streams. 1077 * After this call, all streams are changed to SUSPENDED state. 1078 */ 1079 int snd_pcm_suspend(struct snd_pcm_substream *substream) 1080 { 1081 int err; 1082 unsigned long flags; 1083 1084 if (! substream) 1085 return 0; 1086 1087 snd_pcm_stream_lock_irqsave(substream, flags); 1088 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0); 1089 snd_pcm_stream_unlock_irqrestore(substream, flags); 1090 return err; 1091 } 1092 1093 EXPORT_SYMBOL(snd_pcm_suspend); 1094 1095 /** 1096 * snd_pcm_suspend_all 1097 * @pcm: the PCM instance 1098 * 1099 * Trigger SUSPEND to all substreams in the given pcm. 1100 * After this call, all streams are changed to SUSPENDED state. 1101 */ 1102 int snd_pcm_suspend_all(struct snd_pcm *pcm) 1103 { 1104 struct snd_pcm_substream *substream; 1105 int stream, err = 0; 1106 1107 if (! pcm) 1108 return 0; 1109 1110 for (stream = 0; stream < 2; stream++) { 1111 for (substream = pcm->streams[stream].substream; 1112 substream; substream = substream->next) { 1113 /* FIXME: the open/close code should lock this as well */ 1114 if (substream->runtime == NULL) 1115 continue; 1116 err = snd_pcm_suspend(substream); 1117 if (err < 0 && err != -EBUSY) 1118 return err; 1119 } 1120 } 1121 return 0; 1122 } 1123 1124 EXPORT_SYMBOL(snd_pcm_suspend_all); 1125 1126 /* resume */ 1127 1128 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state) 1129 { 1130 struct snd_pcm_runtime *runtime = substream->runtime; 1131 if (!(runtime->info & SNDRV_PCM_INFO_RESUME)) 1132 return -ENOSYS; 1133 runtime->trigger_master = substream; 1134 return 0; 1135 } 1136 1137 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state) 1138 { 1139 struct snd_pcm_runtime *runtime = substream->runtime; 1140 if (runtime->trigger_master != substream) 1141 return 0; 1142 /* DMA not running previously? */ 1143 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING && 1144 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING || 1145 substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) 1146 return 0; 1147 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME); 1148 } 1149 1150 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state) 1151 { 1152 if (substream->runtime->trigger_master == substream && 1153 snd_pcm_running(substream)) 1154 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); 1155 } 1156 1157 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state) 1158 { 1159 struct snd_pcm_runtime *runtime = substream->runtime; 1160 snd_pcm_trigger_tstamp(substream); 1161 if (substream->timer) 1162 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME, 1163 &runtime->trigger_tstamp); 1164 runtime->status->state = runtime->status->suspended_state; 1165 if (runtime->sleep_min) 1166 snd_pcm_tick_prepare(substream); 1167 } 1168 1169 static struct action_ops snd_pcm_action_resume = { 1170 .pre_action = snd_pcm_pre_resume, 1171 .do_action = snd_pcm_do_resume, 1172 .undo_action = snd_pcm_undo_resume, 1173 .post_action = snd_pcm_post_resume 1174 }; 1175 1176 static int snd_pcm_resume(struct snd_pcm_substream *substream) 1177 { 1178 struct snd_card *card = substream->pcm->card; 1179 int res; 1180 1181 snd_power_lock(card); 1182 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) 1183 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0); 1184 snd_power_unlock(card); 1185 return res; 1186 } 1187 1188 #else 1189 1190 static int snd_pcm_resume(struct snd_pcm_substream *substream) 1191 { 1192 return -ENOSYS; 1193 } 1194 1195 #endif /* CONFIG_PM */ 1196 1197 /* 1198 * xrun ioctl 1199 * 1200 * Change the RUNNING stream(s) to XRUN state. 1201 */ 1202 static int snd_pcm_xrun(struct snd_pcm_substream *substream) 1203 { 1204 struct snd_card *card = substream->pcm->card; 1205 struct snd_pcm_runtime *runtime = substream->runtime; 1206 int result; 1207 1208 snd_power_lock(card); 1209 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1210 result = snd_power_wait(card, SNDRV_CTL_POWER_D0); 1211 if (result < 0) 1212 goto _unlock; 1213 } 1214 1215 snd_pcm_stream_lock_irq(substream); 1216 switch (runtime->status->state) { 1217 case SNDRV_PCM_STATE_XRUN: 1218 result = 0; /* already there */ 1219 break; 1220 case SNDRV_PCM_STATE_RUNNING: 1221 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); 1222 break; 1223 default: 1224 result = -EBADFD; 1225 } 1226 snd_pcm_stream_unlock_irq(substream); 1227 _unlock: 1228 snd_power_unlock(card); 1229 return result; 1230 } 1231 1232 /* 1233 * reset ioctl 1234 */ 1235 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state) 1236 { 1237 struct snd_pcm_runtime *runtime = substream->runtime; 1238 switch (runtime->status->state) { 1239 case SNDRV_PCM_STATE_RUNNING: 1240 case SNDRV_PCM_STATE_PREPARED: 1241 case SNDRV_PCM_STATE_PAUSED: 1242 case SNDRV_PCM_STATE_SUSPENDED: 1243 return 0; 1244 default: 1245 return -EBADFD; 1246 } 1247 } 1248 1249 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state) 1250 { 1251 struct snd_pcm_runtime *runtime = substream->runtime; 1252 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL); 1253 if (err < 0) 1254 return err; 1255 // snd_assert(runtime->status->hw_ptr < runtime->buffer_size, ); 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 return -EBADFD; 1294 if (snd_pcm_running(substream)) 1295 return -EBUSY; 1296 substream->f_flags = f_flags; 1297 return 0; 1298 } 1299 1300 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state) 1301 { 1302 int err; 1303 err = substream->ops->prepare(substream); 1304 if (err < 0) 1305 return err; 1306 return snd_pcm_do_reset(substream, 0); 1307 } 1308 1309 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state) 1310 { 1311 struct snd_pcm_runtime *runtime = substream->runtime; 1312 runtime->control->appl_ptr = runtime->status->hw_ptr; 1313 runtime->status->state = SNDRV_PCM_STATE_PREPARED; 1314 } 1315 1316 static struct action_ops snd_pcm_action_prepare = { 1317 .pre_action = snd_pcm_pre_prepare, 1318 .do_action = snd_pcm_do_prepare, 1319 .post_action = snd_pcm_post_prepare 1320 }; 1321 1322 /** 1323 * snd_pcm_prepare 1324 * @substream: the PCM substream instance 1325 * @file: file to refer f_flags 1326 * 1327 * Prepare the PCM substream to be triggerable. 1328 */ 1329 static int snd_pcm_prepare(struct snd_pcm_substream *substream, 1330 struct file *file) 1331 { 1332 int res; 1333 struct snd_card *card = substream->pcm->card; 1334 int f_flags; 1335 1336 if (file) 1337 f_flags = file->f_flags; 1338 else 1339 f_flags = substream->f_flags; 1340 1341 snd_power_lock(card); 1342 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) 1343 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare, 1344 substream, f_flags); 1345 snd_power_unlock(card); 1346 return res; 1347 } 1348 1349 /* 1350 * drain ioctl 1351 */ 1352 1353 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state) 1354 { 1355 if (substream->f_flags & O_NONBLOCK) 1356 return -EAGAIN; 1357 substream->runtime->trigger_master = substream; 1358 return 0; 1359 } 1360 1361 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state) 1362 { 1363 struct snd_pcm_runtime *runtime = substream->runtime; 1364 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 1365 switch (runtime->status->state) { 1366 case SNDRV_PCM_STATE_PREPARED: 1367 /* start playback stream if possible */ 1368 if (! snd_pcm_playback_empty(substream)) { 1369 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING); 1370 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING); 1371 } 1372 break; 1373 case SNDRV_PCM_STATE_RUNNING: 1374 runtime->status->state = SNDRV_PCM_STATE_DRAINING; 1375 break; 1376 default: 1377 break; 1378 } 1379 } else { 1380 /* stop running stream */ 1381 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) { 1382 int state = snd_pcm_capture_avail(runtime) > 0 ? 1383 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP; 1384 snd_pcm_do_stop(substream, state); 1385 snd_pcm_post_stop(substream, state); 1386 } 1387 } 1388 return 0; 1389 } 1390 1391 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state) 1392 { 1393 } 1394 1395 static struct action_ops snd_pcm_action_drain_init = { 1396 .pre_action = snd_pcm_pre_drain_init, 1397 .do_action = snd_pcm_do_drain_init, 1398 .post_action = snd_pcm_post_drain_init 1399 }; 1400 1401 struct drain_rec { 1402 struct snd_pcm_substream *substream; 1403 wait_queue_t wait; 1404 snd_pcm_uframes_t stop_threshold; 1405 }; 1406 1407 static int snd_pcm_drop(struct snd_pcm_substream *substream); 1408 1409 /* 1410 * Drain the stream(s). 1411 * When the substream is linked, sync until the draining of all playback streams 1412 * is finished. 1413 * After this call, all streams are supposed to be either SETUP or DRAINING 1414 * (capture only) state. 1415 */ 1416 static int snd_pcm_drain(struct snd_pcm_substream *substream) 1417 { 1418 struct snd_card *card; 1419 struct snd_pcm_runtime *runtime; 1420 struct list_head *pos; 1421 int result = 0; 1422 int i, num_drecs; 1423 struct drain_rec *drec, drec_tmp, *d; 1424 1425 snd_assert(substream != NULL, return -ENXIO); 1426 card = substream->pcm->card; 1427 runtime = substream->runtime; 1428 1429 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 1430 return -EBADFD; 1431 1432 snd_power_lock(card); 1433 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1434 result = snd_power_wait(card, SNDRV_CTL_POWER_D0); 1435 if (result < 0) { 1436 snd_power_unlock(card); 1437 return result; 1438 } 1439 } 1440 1441 /* allocate temporary record for drain sync */ 1442 down_read(&snd_pcm_link_rwsem); 1443 if (snd_pcm_stream_linked(substream)) { 1444 drec = kmalloc(substream->group->count * sizeof(*drec), GFP_KERNEL); 1445 if (! drec) { 1446 up_read(&snd_pcm_link_rwsem); 1447 snd_power_unlock(card); 1448 return -ENOMEM; 1449 } 1450 } else 1451 drec = &drec_tmp; 1452 1453 /* count only playback streams */ 1454 num_drecs = 0; 1455 snd_pcm_group_for_each(pos, substream) { 1456 struct snd_pcm_substream *s = snd_pcm_group_substream_entry(pos); 1457 runtime = s->runtime; 1458 if (s->stream == SNDRV_PCM_STREAM_PLAYBACK) { 1459 d = &drec[num_drecs++]; 1460 d->substream = s; 1461 init_waitqueue_entry(&d->wait, current); 1462 add_wait_queue(&runtime->sleep, &d->wait); 1463 /* stop_threshold fixup to avoid endless loop when 1464 * stop_threshold > buffer_size 1465 */ 1466 d->stop_threshold = runtime->stop_threshold; 1467 if (runtime->stop_threshold > runtime->buffer_size) 1468 runtime->stop_threshold = runtime->buffer_size; 1469 } 1470 } 1471 up_read(&snd_pcm_link_rwsem); 1472 1473 snd_pcm_stream_lock_irq(substream); 1474 /* resume pause */ 1475 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) 1476 snd_pcm_pause(substream, 0); 1477 1478 /* pre-start/stop - all running streams are changed to DRAINING state */ 1479 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0); 1480 if (result < 0) { 1481 snd_pcm_stream_unlock_irq(substream); 1482 goto _error; 1483 } 1484 1485 for (;;) { 1486 long tout; 1487 if (signal_pending(current)) { 1488 result = -ERESTARTSYS; 1489 break; 1490 } 1491 /* all finished? */ 1492 for (i = 0; i < num_drecs; i++) { 1493 runtime = drec[i].substream->runtime; 1494 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) 1495 break; 1496 } 1497 if (i == num_drecs) 1498 break; /* yes, all drained */ 1499 1500 set_current_state(TASK_INTERRUPTIBLE); 1501 snd_pcm_stream_unlock_irq(substream); 1502 snd_power_unlock(card); 1503 tout = schedule_timeout(10 * HZ); 1504 snd_power_lock(card); 1505 snd_pcm_stream_lock_irq(substream); 1506 if (tout == 0) { 1507 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1508 result = -ESTRPIPE; 1509 else { 1510 snd_printd("playback drain error (DMA or IRQ trouble?)\n"); 1511 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1512 result = -EIO; 1513 } 1514 break; 1515 } 1516 } 1517 1518 snd_pcm_stream_unlock_irq(substream); 1519 1520 _error: 1521 for (i = 0; i < num_drecs; i++) { 1522 d = &drec[i]; 1523 runtime = d->substream->runtime; 1524 remove_wait_queue(&runtime->sleep, &d->wait); 1525 runtime->stop_threshold = d->stop_threshold; 1526 } 1527 1528 if (drec != &drec_tmp) 1529 kfree(drec); 1530 snd_power_unlock(card); 1531 1532 return result; 1533 } 1534 1535 /* 1536 * drop ioctl 1537 * 1538 * Immediately put all linked substreams into SETUP state. 1539 */ 1540 static int snd_pcm_drop(struct snd_pcm_substream *substream) 1541 { 1542 struct snd_pcm_runtime *runtime; 1543 struct snd_card *card; 1544 int result = 0; 1545 1546 snd_assert(substream != NULL, return -ENXIO); 1547 runtime = substream->runtime; 1548 card = substream->pcm->card; 1549 1550 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 1551 return -EBADFD; 1552 1553 snd_power_lock(card); 1554 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1555 result = snd_power_wait(card, SNDRV_CTL_POWER_D0); 1556 if (result < 0) 1557 goto _unlock; 1558 } 1559 1560 snd_pcm_stream_lock_irq(substream); 1561 /* resume pause */ 1562 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) 1563 snd_pcm_pause(substream, 0); 1564 1565 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1566 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */ 1567 snd_pcm_stream_unlock_irq(substream); 1568 _unlock: 1569 snd_power_unlock(card); 1570 return result; 1571 } 1572 1573 1574 /* WARNING: Don't forget to fput back the file */ 1575 static struct file *snd_pcm_file_fd(int fd) 1576 { 1577 struct file *file; 1578 struct inode *inode; 1579 unsigned int minor; 1580 1581 file = fget(fd); 1582 if (!file) 1583 return NULL; 1584 inode = file->f_dentry->d_inode; 1585 if (!S_ISCHR(inode->i_mode) || 1586 imajor(inode) != snd_major) { 1587 fput(file); 1588 return NULL; 1589 } 1590 minor = iminor(inode); 1591 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) && 1592 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) { 1593 fput(file); 1594 return NULL; 1595 } 1596 return file; 1597 } 1598 1599 /* 1600 * PCM link handling 1601 */ 1602 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd) 1603 { 1604 int res = 0; 1605 struct file *file; 1606 struct snd_pcm_file *pcm_file; 1607 struct snd_pcm_substream *substream1; 1608 1609 file = snd_pcm_file_fd(fd); 1610 if (!file) 1611 return -EBADFD; 1612 pcm_file = file->private_data; 1613 substream1 = pcm_file->substream; 1614 down_write(&snd_pcm_link_rwsem); 1615 write_lock_irq(&snd_pcm_link_rwlock); 1616 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN || 1617 substream->runtime->status->state != substream1->runtime->status->state) { 1618 res = -EBADFD; 1619 goto _end; 1620 } 1621 if (snd_pcm_stream_linked(substream1)) { 1622 res = -EALREADY; 1623 goto _end; 1624 } 1625 if (!snd_pcm_stream_linked(substream)) { 1626 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC); 1627 if (substream->group == NULL) { 1628 res = -ENOMEM; 1629 goto _end; 1630 } 1631 spin_lock_init(&substream->group->lock); 1632 INIT_LIST_HEAD(&substream->group->substreams); 1633 list_add_tail(&substream->link_list, &substream->group->substreams); 1634 substream->group->count = 1; 1635 } 1636 list_add_tail(&substream1->link_list, &substream->group->substreams); 1637 substream->group->count++; 1638 substream1->group = substream->group; 1639 _end: 1640 write_unlock_irq(&snd_pcm_link_rwlock); 1641 up_write(&snd_pcm_link_rwsem); 1642 fput(file); 1643 return res; 1644 } 1645 1646 static void relink_to_local(struct snd_pcm_substream *substream) 1647 { 1648 substream->group = &substream->self_group; 1649 INIT_LIST_HEAD(&substream->self_group.substreams); 1650 list_add_tail(&substream->link_list, &substream->self_group.substreams); 1651 } 1652 1653 static int snd_pcm_unlink(struct snd_pcm_substream *substream) 1654 { 1655 struct list_head *pos; 1656 int res = 0; 1657 1658 down_write(&snd_pcm_link_rwsem); 1659 write_lock_irq(&snd_pcm_link_rwlock); 1660 if (!snd_pcm_stream_linked(substream)) { 1661 res = -EALREADY; 1662 goto _end; 1663 } 1664 list_del(&substream->link_list); 1665 substream->group->count--; 1666 if (substream->group->count == 1) { /* detach the last stream, too */ 1667 snd_pcm_group_for_each(pos, substream) { 1668 relink_to_local(snd_pcm_group_substream_entry(pos)); 1669 break; 1670 } 1671 kfree(substream->group); 1672 } 1673 relink_to_local(substream); 1674 _end: 1675 write_unlock_irq(&snd_pcm_link_rwlock); 1676 up_write(&snd_pcm_link_rwsem); 1677 return res; 1678 } 1679 1680 /* 1681 * hw configurator 1682 */ 1683 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params, 1684 struct snd_pcm_hw_rule *rule) 1685 { 1686 struct snd_interval t; 1687 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]), 1688 hw_param_interval_c(params, rule->deps[1]), &t); 1689 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1690 } 1691 1692 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params, 1693 struct snd_pcm_hw_rule *rule) 1694 { 1695 struct snd_interval t; 1696 snd_interval_div(hw_param_interval_c(params, rule->deps[0]), 1697 hw_param_interval_c(params, rule->deps[1]), &t); 1698 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1699 } 1700 1701 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params, 1702 struct snd_pcm_hw_rule *rule) 1703 { 1704 struct snd_interval t; 1705 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]), 1706 hw_param_interval_c(params, rule->deps[1]), 1707 (unsigned long) rule->private, &t); 1708 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1709 } 1710 1711 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params, 1712 struct snd_pcm_hw_rule *rule) 1713 { 1714 struct snd_interval t; 1715 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]), 1716 (unsigned long) rule->private, 1717 hw_param_interval_c(params, rule->deps[1]), &t); 1718 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1719 } 1720 1721 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params, 1722 struct snd_pcm_hw_rule *rule) 1723 { 1724 unsigned int k; 1725 struct snd_interval *i = hw_param_interval(params, rule->deps[0]); 1726 struct snd_mask m; 1727 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 1728 snd_mask_any(&m); 1729 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { 1730 int bits; 1731 if (! snd_mask_test(mask, k)) 1732 continue; 1733 bits = snd_pcm_format_physical_width(k); 1734 if (bits <= 0) 1735 continue; /* ignore invalid formats */ 1736 if ((unsigned)bits < i->min || (unsigned)bits > i->max) 1737 snd_mask_reset(&m, k); 1738 } 1739 return snd_mask_refine(mask, &m); 1740 } 1741 1742 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params, 1743 struct snd_pcm_hw_rule *rule) 1744 { 1745 struct snd_interval t; 1746 unsigned int k; 1747 t.min = UINT_MAX; 1748 t.max = 0; 1749 t.openmin = 0; 1750 t.openmax = 0; 1751 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { 1752 int bits; 1753 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k)) 1754 continue; 1755 bits = snd_pcm_format_physical_width(k); 1756 if (bits <= 0) 1757 continue; /* ignore invalid formats */ 1758 if (t.min > (unsigned)bits) 1759 t.min = bits; 1760 if (t.max < (unsigned)bits) 1761 t.max = bits; 1762 } 1763 t.integer = 1; 1764 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1765 } 1766 1767 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12 1768 #error "Change this table" 1769 #endif 1770 1771 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100, 1772 48000, 64000, 88200, 96000, 176400, 192000 }; 1773 1774 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params, 1775 struct snd_pcm_hw_rule *rule) 1776 { 1777 struct snd_pcm_hardware *hw = rule->private; 1778 return snd_interval_list(hw_param_interval(params, rule->var), 1779 ARRAY_SIZE(rates), rates, hw->rates); 1780 } 1781 1782 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params, 1783 struct snd_pcm_hw_rule *rule) 1784 { 1785 struct snd_interval t; 1786 struct snd_pcm_substream *substream = rule->private; 1787 t.min = 0; 1788 t.max = substream->buffer_bytes_max; 1789 t.openmin = 0; 1790 t.openmax = 0; 1791 t.integer = 1; 1792 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1793 } 1794 1795 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream) 1796 { 1797 struct snd_pcm_runtime *runtime = substream->runtime; 1798 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; 1799 int k, err; 1800 1801 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { 1802 snd_mask_any(constrs_mask(constrs, k)); 1803 } 1804 1805 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { 1806 snd_interval_any(constrs_interval(constrs, k)); 1807 } 1808 1809 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS)); 1810 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)); 1811 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)); 1812 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)); 1813 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS)); 1814 1815 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, 1816 snd_pcm_hw_rule_format, NULL, 1817 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1818 if (err < 0) 1819 return err; 1820 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 1821 snd_pcm_hw_rule_sample_bits, NULL, 1822 SNDRV_PCM_HW_PARAM_FORMAT, 1823 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1824 if (err < 0) 1825 return err; 1826 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 1827 snd_pcm_hw_rule_div, NULL, 1828 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); 1829 if (err < 0) 1830 return err; 1831 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1832 snd_pcm_hw_rule_mul, NULL, 1833 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); 1834 if (err < 0) 1835 return err; 1836 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1837 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1838 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 1839 if (err < 0) 1840 return err; 1841 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1842 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1843 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1); 1844 if (err < 0) 1845 return err; 1846 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 1847 snd_pcm_hw_rule_div, NULL, 1848 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1849 if (err < 0) 1850 return err; 1851 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1852 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1853 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1); 1854 if (err < 0) 1855 return err; 1856 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1857 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1858 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1); 1859 if (err < 0) 1860 return err; 1861 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, 1862 snd_pcm_hw_rule_div, NULL, 1863 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 1864 if (err < 0) 1865 return err; 1866 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1867 snd_pcm_hw_rule_div, NULL, 1868 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); 1869 if (err < 0) 1870 return err; 1871 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1872 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1873 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1874 if (err < 0) 1875 return err; 1876 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1877 snd_pcm_hw_rule_muldivk, (void*) 1000000, 1878 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); 1879 if (err < 0) 1880 return err; 1881 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1882 snd_pcm_hw_rule_mul, NULL, 1883 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); 1884 if (err < 0) 1885 return err; 1886 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1887 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1888 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1889 if (err < 0) 1890 return err; 1891 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1892 snd_pcm_hw_rule_muldivk, (void*) 1000000, 1893 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); 1894 if (err < 0) 1895 return err; 1896 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 1897 snd_pcm_hw_rule_muldivk, (void*) 8, 1898 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1899 if (err < 0) 1900 return err; 1901 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1902 snd_pcm_hw_rule_muldivk, (void*) 8, 1903 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1904 if (err < 0) 1905 return err; 1906 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 1907 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1908 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); 1909 if (err < 0) 1910 return err; 1911 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME, 1912 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1913 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); 1914 if (err < 0) 1915 return err; 1916 return 0; 1917 } 1918 1919 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream) 1920 { 1921 struct snd_pcm_runtime *runtime = substream->runtime; 1922 struct snd_pcm_hardware *hw = &runtime->hw; 1923 int err; 1924 unsigned int mask = 0; 1925 1926 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) 1927 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED; 1928 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) 1929 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED; 1930 if (hw->info & SNDRV_PCM_INFO_MMAP) { 1931 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) 1932 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; 1933 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) 1934 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED; 1935 if (hw->info & SNDRV_PCM_INFO_COMPLEX) 1936 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX; 1937 } 1938 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask); 1939 snd_assert(err >= 0, return -EINVAL); 1940 1941 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats); 1942 snd_assert(err >= 0, return -EINVAL); 1943 1944 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD); 1945 snd_assert(err >= 0, return -EINVAL); 1946 1947 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, 1948 hw->channels_min, hw->channels_max); 1949 snd_assert(err >= 0, return -EINVAL); 1950 1951 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE, 1952 hw->rate_min, hw->rate_max); 1953 snd_assert(err >= 0, return -EINVAL); 1954 1955 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 1956 hw->period_bytes_min, hw->period_bytes_max); 1957 snd_assert(err >= 0, return -EINVAL); 1958 1959 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS, 1960 hw->periods_min, hw->periods_max); 1961 snd_assert(err >= 0, return -EINVAL); 1962 1963 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1964 hw->period_bytes_min, hw->buffer_bytes_max); 1965 snd_assert(err >= 0, return -EINVAL); 1966 1967 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1968 snd_pcm_hw_rule_buffer_bytes_max, substream, 1969 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1); 1970 if (err < 0) 1971 return err; 1972 1973 /* FIXME: remove */ 1974 if (runtime->dma_bytes) { 1975 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes); 1976 snd_assert(err >= 0, return -EINVAL); 1977 } 1978 1979 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) { 1980 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1981 snd_pcm_hw_rule_rate, hw, 1982 SNDRV_PCM_HW_PARAM_RATE, -1); 1983 if (err < 0) 1984 return err; 1985 } 1986 1987 /* FIXME: this belong to lowlevel */ 1988 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_TICK_TIME, 1989 1000000 / HZ, 1000000 / HZ); 1990 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE); 1991 1992 return 0; 1993 } 1994 1995 static void snd_pcm_add_file(struct snd_pcm_str *str, 1996 struct snd_pcm_file *pcm_file) 1997 { 1998 pcm_file->next = str->files; 1999 str->files = pcm_file; 2000 } 2001 2002 static void snd_pcm_remove_file(struct snd_pcm_str *str, 2003 struct snd_pcm_file *pcm_file) 2004 { 2005 struct snd_pcm_file * pcm_file1; 2006 if (str->files == pcm_file) { 2007 str->files = pcm_file->next; 2008 } else { 2009 pcm_file1 = str->files; 2010 while (pcm_file1 && pcm_file1->next != pcm_file) 2011 pcm_file1 = pcm_file1->next; 2012 if (pcm_file1 != NULL) 2013 pcm_file1->next = pcm_file->next; 2014 } 2015 } 2016 2017 static void pcm_release_private(struct snd_pcm_substream *substream) 2018 { 2019 struct snd_pcm_file *pcm_file = substream->file; 2020 2021 snd_pcm_unlink(substream); 2022 snd_pcm_remove_file(substream->pstr, pcm_file); 2023 kfree(pcm_file); 2024 } 2025 2026 void snd_pcm_release_substream(struct snd_pcm_substream *substream) 2027 { 2028 substream->ref_count--; 2029 if (substream->ref_count > 0) 2030 return; 2031 2032 snd_pcm_drop(substream); 2033 if (substream->hw_opened) { 2034 if (substream->ops->hw_free != NULL) 2035 substream->ops->hw_free(substream); 2036 substream->ops->close(substream); 2037 substream->hw_opened = 0; 2038 } 2039 if (substream->pcm_release) { 2040 substream->pcm_release(substream); 2041 substream->pcm_release = NULL; 2042 } 2043 snd_pcm_detach_substream(substream); 2044 } 2045 2046 EXPORT_SYMBOL(snd_pcm_release_substream); 2047 2048 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, 2049 struct file *file, 2050 struct snd_pcm_substream **rsubstream) 2051 { 2052 struct snd_pcm_substream *substream; 2053 int err; 2054 2055 err = snd_pcm_attach_substream(pcm, stream, file, &substream); 2056 if (err < 0) 2057 return err; 2058 if (substream->ref_count > 1) { 2059 *rsubstream = substream; 2060 return 0; 2061 } 2062 2063 substream->no_mmap_ctrl = 0; 2064 err = snd_pcm_hw_constraints_init(substream); 2065 if (err < 0) { 2066 snd_printd("snd_pcm_hw_constraints_init failed\n"); 2067 goto error; 2068 } 2069 2070 if ((err = substream->ops->open(substream)) < 0) 2071 goto error; 2072 2073 substream->hw_opened = 1; 2074 2075 err = snd_pcm_hw_constraints_complete(substream); 2076 if (err < 0) { 2077 snd_printd("snd_pcm_hw_constraints_complete failed\n"); 2078 goto error; 2079 } 2080 2081 *rsubstream = substream; 2082 return 0; 2083 2084 error: 2085 snd_pcm_release_substream(substream); 2086 return err; 2087 } 2088 2089 EXPORT_SYMBOL(snd_pcm_open_substream); 2090 2091 static int snd_pcm_open_file(struct file *file, 2092 struct snd_pcm *pcm, 2093 int stream, 2094 struct snd_pcm_file **rpcm_file) 2095 { 2096 struct snd_pcm_file *pcm_file; 2097 struct snd_pcm_substream *substream; 2098 struct snd_pcm_str *str; 2099 int err; 2100 2101 snd_assert(rpcm_file != NULL, return -EINVAL); 2102 *rpcm_file = NULL; 2103 2104 err = snd_pcm_open_substream(pcm, stream, file, &substream); 2105 if (err < 0) 2106 return err; 2107 2108 if (substream->ref_count > 1) 2109 pcm_file = substream->file; 2110 else { 2111 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL); 2112 if (pcm_file == NULL) { 2113 snd_pcm_release_substream(substream); 2114 return -ENOMEM; 2115 } 2116 str = substream->pstr; 2117 substream->file = pcm_file; 2118 substream->pcm_release = pcm_release_private; 2119 pcm_file->substream = substream; 2120 snd_pcm_add_file(str, pcm_file); 2121 } 2122 file->private_data = pcm_file; 2123 *rpcm_file = pcm_file; 2124 return 0; 2125 } 2126 2127 static int snd_pcm_playback_open(struct inode *inode, struct file *file) 2128 { 2129 struct snd_pcm *pcm; 2130 2131 pcm = snd_lookup_minor_data(iminor(inode), 2132 SNDRV_DEVICE_TYPE_PCM_PLAYBACK); 2133 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK); 2134 } 2135 2136 static int snd_pcm_capture_open(struct inode *inode, struct file *file) 2137 { 2138 struct snd_pcm *pcm; 2139 2140 pcm = snd_lookup_minor_data(iminor(inode), 2141 SNDRV_DEVICE_TYPE_PCM_CAPTURE); 2142 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE); 2143 } 2144 2145 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream) 2146 { 2147 int err; 2148 struct snd_pcm_file *pcm_file; 2149 wait_queue_t wait; 2150 2151 if (pcm == NULL) { 2152 err = -ENODEV; 2153 goto __error1; 2154 } 2155 err = snd_card_file_add(pcm->card, file); 2156 if (err < 0) 2157 goto __error1; 2158 if (!try_module_get(pcm->card->module)) { 2159 err = -EFAULT; 2160 goto __error2; 2161 } 2162 init_waitqueue_entry(&wait, current); 2163 add_wait_queue(&pcm->open_wait, &wait); 2164 mutex_lock(&pcm->open_mutex); 2165 while (1) { 2166 err = snd_pcm_open_file(file, pcm, stream, &pcm_file); 2167 if (err >= 0) 2168 break; 2169 if (err == -EAGAIN) { 2170 if (file->f_flags & O_NONBLOCK) { 2171 err = -EBUSY; 2172 break; 2173 } 2174 } else 2175 break; 2176 set_current_state(TASK_INTERRUPTIBLE); 2177 mutex_unlock(&pcm->open_mutex); 2178 schedule(); 2179 mutex_lock(&pcm->open_mutex); 2180 if (signal_pending(current)) { 2181 err = -ERESTARTSYS; 2182 break; 2183 } 2184 } 2185 remove_wait_queue(&pcm->open_wait, &wait); 2186 mutex_unlock(&pcm->open_mutex); 2187 if (err < 0) 2188 goto __error; 2189 return err; 2190 2191 __error: 2192 module_put(pcm->card->module); 2193 __error2: 2194 snd_card_file_remove(pcm->card, file); 2195 __error1: 2196 return err; 2197 } 2198 2199 static int snd_pcm_release(struct inode *inode, struct file *file) 2200 { 2201 struct snd_pcm *pcm; 2202 struct snd_pcm_substream *substream; 2203 struct snd_pcm_file *pcm_file; 2204 2205 pcm_file = file->private_data; 2206 substream = pcm_file->substream; 2207 snd_assert(substream != NULL, return -ENXIO); 2208 snd_assert(!atomic_read(&substream->mmap_count), ); 2209 pcm = substream->pcm; 2210 fasync_helper(-1, file, 0, &substream->runtime->fasync); 2211 mutex_lock(&pcm->open_mutex); 2212 snd_pcm_release_substream(substream); 2213 mutex_unlock(&pcm->open_mutex); 2214 wake_up(&pcm->open_wait); 2215 module_put(pcm->card->module); 2216 snd_card_file_remove(pcm->card, file); 2217 return 0; 2218 } 2219 2220 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream, 2221 snd_pcm_uframes_t frames) 2222 { 2223 struct snd_pcm_runtime *runtime = substream->runtime; 2224 snd_pcm_sframes_t appl_ptr; 2225 snd_pcm_sframes_t ret; 2226 snd_pcm_sframes_t hw_avail; 2227 2228 if (frames == 0) 2229 return 0; 2230 2231 snd_pcm_stream_lock_irq(substream); 2232 switch (runtime->status->state) { 2233 case SNDRV_PCM_STATE_PREPARED: 2234 break; 2235 case SNDRV_PCM_STATE_DRAINING: 2236 case SNDRV_PCM_STATE_RUNNING: 2237 if (snd_pcm_update_hw_ptr(substream) >= 0) 2238 break; 2239 /* Fall through */ 2240 case SNDRV_PCM_STATE_XRUN: 2241 ret = -EPIPE; 2242 goto __end; 2243 default: 2244 ret = -EBADFD; 2245 goto __end; 2246 } 2247 2248 hw_avail = snd_pcm_playback_hw_avail(runtime); 2249 if (hw_avail <= 0) { 2250 ret = 0; 2251 goto __end; 2252 } 2253 if (frames > (snd_pcm_uframes_t)hw_avail) 2254 frames = hw_avail; 2255 else 2256 frames -= frames % runtime->xfer_align; 2257 appl_ptr = runtime->control->appl_ptr - frames; 2258 if (appl_ptr < 0) 2259 appl_ptr += runtime->boundary; 2260 runtime->control->appl_ptr = appl_ptr; 2261 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING && 2262 runtime->sleep_min) 2263 snd_pcm_tick_prepare(substream); 2264 ret = frames; 2265 __end: 2266 snd_pcm_stream_unlock_irq(substream); 2267 return ret; 2268 } 2269 2270 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream, 2271 snd_pcm_uframes_t frames) 2272 { 2273 struct snd_pcm_runtime *runtime = substream->runtime; 2274 snd_pcm_sframes_t appl_ptr; 2275 snd_pcm_sframes_t ret; 2276 snd_pcm_sframes_t hw_avail; 2277 2278 if (frames == 0) 2279 return 0; 2280 2281 snd_pcm_stream_lock_irq(substream); 2282 switch (runtime->status->state) { 2283 case SNDRV_PCM_STATE_PREPARED: 2284 case SNDRV_PCM_STATE_DRAINING: 2285 break; 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 default: 2294 ret = -EBADFD; 2295 goto __end; 2296 } 2297 2298 hw_avail = snd_pcm_capture_hw_avail(runtime); 2299 if (hw_avail <= 0) { 2300 ret = 0; 2301 goto __end; 2302 } 2303 if (frames > (snd_pcm_uframes_t)hw_avail) 2304 frames = hw_avail; 2305 else 2306 frames -= frames % runtime->xfer_align; 2307 appl_ptr = runtime->control->appl_ptr - frames; 2308 if (appl_ptr < 0) 2309 appl_ptr += runtime->boundary; 2310 runtime->control->appl_ptr = appl_ptr; 2311 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING && 2312 runtime->sleep_min) 2313 snd_pcm_tick_prepare(substream); 2314 ret = frames; 2315 __end: 2316 snd_pcm_stream_unlock_irq(substream); 2317 return ret; 2318 } 2319 2320 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream, 2321 snd_pcm_uframes_t frames) 2322 { 2323 struct snd_pcm_runtime *runtime = substream->runtime; 2324 snd_pcm_sframes_t appl_ptr; 2325 snd_pcm_sframes_t ret; 2326 snd_pcm_sframes_t avail; 2327 2328 if (frames == 0) 2329 return 0; 2330 2331 snd_pcm_stream_lock_irq(substream); 2332 switch (runtime->status->state) { 2333 case SNDRV_PCM_STATE_PREPARED: 2334 case SNDRV_PCM_STATE_PAUSED: 2335 break; 2336 case SNDRV_PCM_STATE_DRAINING: 2337 case SNDRV_PCM_STATE_RUNNING: 2338 if (snd_pcm_update_hw_ptr(substream) >= 0) 2339 break; 2340 /* Fall through */ 2341 case SNDRV_PCM_STATE_XRUN: 2342 ret = -EPIPE; 2343 goto __end; 2344 default: 2345 ret = -EBADFD; 2346 goto __end; 2347 } 2348 2349 avail = snd_pcm_playback_avail(runtime); 2350 if (avail <= 0) { 2351 ret = 0; 2352 goto __end; 2353 } 2354 if (frames > (snd_pcm_uframes_t)avail) 2355 frames = avail; 2356 else 2357 frames -= frames % runtime->xfer_align; 2358 appl_ptr = runtime->control->appl_ptr + frames; 2359 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) 2360 appl_ptr -= runtime->boundary; 2361 runtime->control->appl_ptr = appl_ptr; 2362 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING && 2363 runtime->sleep_min) 2364 snd_pcm_tick_prepare(substream); 2365 ret = frames; 2366 __end: 2367 snd_pcm_stream_unlock_irq(substream); 2368 return ret; 2369 } 2370 2371 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream, 2372 snd_pcm_uframes_t frames) 2373 { 2374 struct snd_pcm_runtime *runtime = substream->runtime; 2375 snd_pcm_sframes_t appl_ptr; 2376 snd_pcm_sframes_t ret; 2377 snd_pcm_sframes_t avail; 2378 2379 if (frames == 0) 2380 return 0; 2381 2382 snd_pcm_stream_lock_irq(substream); 2383 switch (runtime->status->state) { 2384 case SNDRV_PCM_STATE_PREPARED: 2385 case SNDRV_PCM_STATE_DRAINING: 2386 case SNDRV_PCM_STATE_PAUSED: 2387 break; 2388 case SNDRV_PCM_STATE_RUNNING: 2389 if (snd_pcm_update_hw_ptr(substream) >= 0) 2390 break; 2391 /* Fall through */ 2392 case SNDRV_PCM_STATE_XRUN: 2393 ret = -EPIPE; 2394 goto __end; 2395 default: 2396 ret = -EBADFD; 2397 goto __end; 2398 } 2399 2400 avail = snd_pcm_capture_avail(runtime); 2401 if (avail <= 0) { 2402 ret = 0; 2403 goto __end; 2404 } 2405 if (frames > (snd_pcm_uframes_t)avail) 2406 frames = avail; 2407 else 2408 frames -= frames % runtime->xfer_align; 2409 appl_ptr = runtime->control->appl_ptr + frames; 2410 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) 2411 appl_ptr -= runtime->boundary; 2412 runtime->control->appl_ptr = appl_ptr; 2413 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING && 2414 runtime->sleep_min) 2415 snd_pcm_tick_prepare(substream); 2416 ret = frames; 2417 __end: 2418 snd_pcm_stream_unlock_irq(substream); 2419 return ret; 2420 } 2421 2422 static int snd_pcm_hwsync(struct snd_pcm_substream *substream) 2423 { 2424 struct snd_pcm_runtime *runtime = substream->runtime; 2425 int err; 2426 2427 snd_pcm_stream_lock_irq(substream); 2428 switch (runtime->status->state) { 2429 case SNDRV_PCM_STATE_DRAINING: 2430 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 2431 goto __badfd; 2432 case SNDRV_PCM_STATE_RUNNING: 2433 if ((err = snd_pcm_update_hw_ptr(substream)) < 0) 2434 break; 2435 /* Fall through */ 2436 case SNDRV_PCM_STATE_PREPARED: 2437 case SNDRV_PCM_STATE_SUSPENDED: 2438 err = 0; 2439 break; 2440 case SNDRV_PCM_STATE_XRUN: 2441 err = -EPIPE; 2442 break; 2443 default: 2444 __badfd: 2445 err = -EBADFD; 2446 break; 2447 } 2448 snd_pcm_stream_unlock_irq(substream); 2449 return err; 2450 } 2451 2452 static int snd_pcm_delay(struct snd_pcm_substream *substream, 2453 snd_pcm_sframes_t __user *res) 2454 { 2455 struct snd_pcm_runtime *runtime = substream->runtime; 2456 int err; 2457 snd_pcm_sframes_t n = 0; 2458 2459 snd_pcm_stream_lock_irq(substream); 2460 switch (runtime->status->state) { 2461 case SNDRV_PCM_STATE_DRAINING: 2462 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 2463 goto __badfd; 2464 case SNDRV_PCM_STATE_RUNNING: 2465 if ((err = snd_pcm_update_hw_ptr(substream)) < 0) 2466 break; 2467 /* Fall through */ 2468 case SNDRV_PCM_STATE_PREPARED: 2469 case SNDRV_PCM_STATE_SUSPENDED: 2470 err = 0; 2471 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2472 n = snd_pcm_playback_hw_avail(runtime); 2473 else 2474 n = snd_pcm_capture_avail(runtime); 2475 break; 2476 case SNDRV_PCM_STATE_XRUN: 2477 err = -EPIPE; 2478 break; 2479 default: 2480 __badfd: 2481 err = -EBADFD; 2482 break; 2483 } 2484 snd_pcm_stream_unlock_irq(substream); 2485 if (!err) 2486 if (put_user(n, res)) 2487 err = -EFAULT; 2488 return err; 2489 } 2490 2491 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream, 2492 struct snd_pcm_sync_ptr __user *_sync_ptr) 2493 { 2494 struct snd_pcm_runtime *runtime = substream->runtime; 2495 struct snd_pcm_sync_ptr sync_ptr; 2496 volatile struct snd_pcm_mmap_status *status; 2497 volatile struct snd_pcm_mmap_control *control; 2498 int err; 2499 2500 memset(&sync_ptr, 0, sizeof(sync_ptr)); 2501 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags))) 2502 return -EFAULT; 2503 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control))) 2504 return -EFAULT; 2505 status = runtime->status; 2506 control = runtime->control; 2507 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) { 2508 err = snd_pcm_hwsync(substream); 2509 if (err < 0) 2510 return err; 2511 } 2512 snd_pcm_stream_lock_irq(substream); 2513 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) 2514 control->appl_ptr = sync_ptr.c.control.appl_ptr; 2515 else 2516 sync_ptr.c.control.appl_ptr = control->appl_ptr; 2517 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) 2518 control->avail_min = sync_ptr.c.control.avail_min; 2519 else 2520 sync_ptr.c.control.avail_min = control->avail_min; 2521 sync_ptr.s.status.state = status->state; 2522 sync_ptr.s.status.hw_ptr = status->hw_ptr; 2523 sync_ptr.s.status.tstamp = status->tstamp; 2524 sync_ptr.s.status.suspended_state = status->suspended_state; 2525 snd_pcm_stream_unlock_irq(substream); 2526 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr))) 2527 return -EFAULT; 2528 return 0; 2529 } 2530 2531 static int snd_pcm_common_ioctl1(struct file *file, 2532 struct snd_pcm_substream *substream, 2533 unsigned int cmd, void __user *arg) 2534 { 2535 snd_assert(substream != NULL, return -ENXIO); 2536 2537 switch (cmd) { 2538 case SNDRV_PCM_IOCTL_PVERSION: 2539 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0; 2540 case SNDRV_PCM_IOCTL_INFO: 2541 return snd_pcm_info_user(substream, arg); 2542 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */ 2543 return 0; 2544 case SNDRV_PCM_IOCTL_HW_REFINE: 2545 return snd_pcm_hw_refine_user(substream, arg); 2546 case SNDRV_PCM_IOCTL_HW_PARAMS: 2547 return snd_pcm_hw_params_user(substream, arg); 2548 case SNDRV_PCM_IOCTL_HW_FREE: 2549 return snd_pcm_hw_free(substream); 2550 case SNDRV_PCM_IOCTL_SW_PARAMS: 2551 return snd_pcm_sw_params_user(substream, arg); 2552 case SNDRV_PCM_IOCTL_STATUS: 2553 return snd_pcm_status_user(substream, arg); 2554 case SNDRV_PCM_IOCTL_CHANNEL_INFO: 2555 return snd_pcm_channel_info_user(substream, arg); 2556 case SNDRV_PCM_IOCTL_PREPARE: 2557 return snd_pcm_prepare(substream, file); 2558 case SNDRV_PCM_IOCTL_RESET: 2559 return snd_pcm_reset(substream); 2560 case SNDRV_PCM_IOCTL_START: 2561 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING); 2562 case SNDRV_PCM_IOCTL_LINK: 2563 return snd_pcm_link(substream, (int)(unsigned long) arg); 2564 case SNDRV_PCM_IOCTL_UNLINK: 2565 return snd_pcm_unlink(substream); 2566 case SNDRV_PCM_IOCTL_RESUME: 2567 return snd_pcm_resume(substream); 2568 case SNDRV_PCM_IOCTL_XRUN: 2569 return snd_pcm_xrun(substream); 2570 case SNDRV_PCM_IOCTL_HWSYNC: 2571 return snd_pcm_hwsync(substream); 2572 case SNDRV_PCM_IOCTL_DELAY: 2573 return snd_pcm_delay(substream, arg); 2574 case SNDRV_PCM_IOCTL_SYNC_PTR: 2575 return snd_pcm_sync_ptr(substream, arg); 2576 #ifdef CONFIG_SND_SUPPORT_OLD_API 2577 case SNDRV_PCM_IOCTL_HW_REFINE_OLD: 2578 return snd_pcm_hw_refine_old_user(substream, arg); 2579 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD: 2580 return snd_pcm_hw_params_old_user(substream, arg); 2581 #endif 2582 case SNDRV_PCM_IOCTL_DRAIN: 2583 return snd_pcm_drain(substream); 2584 case SNDRV_PCM_IOCTL_DROP: 2585 return snd_pcm_drop(substream); 2586 case SNDRV_PCM_IOCTL_PAUSE: 2587 { 2588 int res; 2589 snd_pcm_stream_lock_irq(substream); 2590 res = snd_pcm_pause(substream, (int)(unsigned long)arg); 2591 snd_pcm_stream_unlock_irq(substream); 2592 return res; 2593 } 2594 } 2595 snd_printd("unknown ioctl = 0x%x\n", cmd); 2596 return -ENOTTY; 2597 } 2598 2599 static int snd_pcm_playback_ioctl1(struct file *file, 2600 struct snd_pcm_substream *substream, 2601 unsigned int cmd, void __user *arg) 2602 { 2603 snd_assert(substream != NULL, return -ENXIO); 2604 snd_assert(substream->stream == SNDRV_PCM_STREAM_PLAYBACK, return -EINVAL); 2605 switch (cmd) { 2606 case SNDRV_PCM_IOCTL_WRITEI_FRAMES: 2607 { 2608 struct snd_xferi xferi; 2609 struct snd_xferi __user *_xferi = arg; 2610 struct snd_pcm_runtime *runtime = substream->runtime; 2611 snd_pcm_sframes_t result; 2612 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2613 return -EBADFD; 2614 if (put_user(0, &_xferi->result)) 2615 return -EFAULT; 2616 if (copy_from_user(&xferi, _xferi, sizeof(xferi))) 2617 return -EFAULT; 2618 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames); 2619 __put_user(result, &_xferi->result); 2620 return result < 0 ? result : 0; 2621 } 2622 case SNDRV_PCM_IOCTL_WRITEN_FRAMES: 2623 { 2624 struct snd_xfern xfern; 2625 struct snd_xfern __user *_xfern = arg; 2626 struct snd_pcm_runtime *runtime = substream->runtime; 2627 void __user **bufs; 2628 snd_pcm_sframes_t result; 2629 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2630 return -EBADFD; 2631 if (runtime->channels > 128) 2632 return -EINVAL; 2633 if (put_user(0, &_xfern->result)) 2634 return -EFAULT; 2635 if (copy_from_user(&xfern, _xfern, sizeof(xfern))) 2636 return -EFAULT; 2637 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL); 2638 if (bufs == NULL) 2639 return -ENOMEM; 2640 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) { 2641 kfree(bufs); 2642 return -EFAULT; 2643 } 2644 result = snd_pcm_lib_writev(substream, bufs, xfern.frames); 2645 kfree(bufs); 2646 __put_user(result, &_xfern->result); 2647 return result < 0 ? result : 0; 2648 } 2649 case SNDRV_PCM_IOCTL_REWIND: 2650 { 2651 snd_pcm_uframes_t frames; 2652 snd_pcm_uframes_t __user *_frames = arg; 2653 snd_pcm_sframes_t result; 2654 if (get_user(frames, _frames)) 2655 return -EFAULT; 2656 if (put_user(0, _frames)) 2657 return -EFAULT; 2658 result = snd_pcm_playback_rewind(substream, frames); 2659 __put_user(result, _frames); 2660 return result < 0 ? result : 0; 2661 } 2662 case SNDRV_PCM_IOCTL_FORWARD: 2663 { 2664 snd_pcm_uframes_t frames; 2665 snd_pcm_uframes_t __user *_frames = arg; 2666 snd_pcm_sframes_t result; 2667 if (get_user(frames, _frames)) 2668 return -EFAULT; 2669 if (put_user(0, _frames)) 2670 return -EFAULT; 2671 result = snd_pcm_playback_forward(substream, frames); 2672 __put_user(result, _frames); 2673 return result < 0 ? result : 0; 2674 } 2675 } 2676 return snd_pcm_common_ioctl1(file, substream, cmd, arg); 2677 } 2678 2679 static int snd_pcm_capture_ioctl1(struct file *file, 2680 struct snd_pcm_substream *substream, 2681 unsigned int cmd, void __user *arg) 2682 { 2683 snd_assert(substream != NULL, return -ENXIO); 2684 snd_assert(substream->stream == SNDRV_PCM_STREAM_CAPTURE, return -EINVAL); 2685 switch (cmd) { 2686 case SNDRV_PCM_IOCTL_READI_FRAMES: 2687 { 2688 struct snd_xferi xferi; 2689 struct snd_xferi __user *_xferi = arg; 2690 struct snd_pcm_runtime *runtime = substream->runtime; 2691 snd_pcm_sframes_t result; 2692 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2693 return -EBADFD; 2694 if (put_user(0, &_xferi->result)) 2695 return -EFAULT; 2696 if (copy_from_user(&xferi, _xferi, sizeof(xferi))) 2697 return -EFAULT; 2698 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames); 2699 __put_user(result, &_xferi->result); 2700 return result < 0 ? result : 0; 2701 } 2702 case SNDRV_PCM_IOCTL_READN_FRAMES: 2703 { 2704 struct snd_xfern xfern; 2705 struct snd_xfern __user *_xfern = arg; 2706 struct snd_pcm_runtime *runtime = substream->runtime; 2707 void *bufs; 2708 snd_pcm_sframes_t result; 2709 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2710 return -EBADFD; 2711 if (runtime->channels > 128) 2712 return -EINVAL; 2713 if (put_user(0, &_xfern->result)) 2714 return -EFAULT; 2715 if (copy_from_user(&xfern, _xfern, sizeof(xfern))) 2716 return -EFAULT; 2717 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL); 2718 if (bufs == NULL) 2719 return -ENOMEM; 2720 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) { 2721 kfree(bufs); 2722 return -EFAULT; 2723 } 2724 result = snd_pcm_lib_readv(substream, bufs, xfern.frames); 2725 kfree(bufs); 2726 __put_user(result, &_xfern->result); 2727 return result < 0 ? result : 0; 2728 } 2729 case SNDRV_PCM_IOCTL_REWIND: 2730 { 2731 snd_pcm_uframes_t frames; 2732 snd_pcm_uframes_t __user *_frames = arg; 2733 snd_pcm_sframes_t result; 2734 if (get_user(frames, _frames)) 2735 return -EFAULT; 2736 if (put_user(0, _frames)) 2737 return -EFAULT; 2738 result = snd_pcm_capture_rewind(substream, frames); 2739 __put_user(result, _frames); 2740 return result < 0 ? result : 0; 2741 } 2742 case SNDRV_PCM_IOCTL_FORWARD: 2743 { 2744 snd_pcm_uframes_t frames; 2745 snd_pcm_uframes_t __user *_frames = arg; 2746 snd_pcm_sframes_t result; 2747 if (get_user(frames, _frames)) 2748 return -EFAULT; 2749 if (put_user(0, _frames)) 2750 return -EFAULT; 2751 result = snd_pcm_capture_forward(substream, frames); 2752 __put_user(result, _frames); 2753 return result < 0 ? result : 0; 2754 } 2755 } 2756 return snd_pcm_common_ioctl1(file, substream, cmd, arg); 2757 } 2758 2759 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd, 2760 unsigned long arg) 2761 { 2762 struct snd_pcm_file *pcm_file; 2763 2764 pcm_file = file->private_data; 2765 2766 if (((cmd >> 8) & 0xff) != 'A') 2767 return -ENOTTY; 2768 2769 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd, 2770 (void __user *)arg); 2771 } 2772 2773 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd, 2774 unsigned long arg) 2775 { 2776 struct snd_pcm_file *pcm_file; 2777 2778 pcm_file = file->private_data; 2779 2780 if (((cmd >> 8) & 0xff) != 'A') 2781 return -ENOTTY; 2782 2783 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd, 2784 (void __user *)arg); 2785 } 2786 2787 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, 2788 unsigned int cmd, void *arg) 2789 { 2790 mm_segment_t fs; 2791 int result; 2792 2793 fs = snd_enter_user(); 2794 switch (substream->stream) { 2795 case SNDRV_PCM_STREAM_PLAYBACK: 2796 result = snd_pcm_playback_ioctl1(NULL, substream, cmd, 2797 (void __user *)arg); 2798 break; 2799 case SNDRV_PCM_STREAM_CAPTURE: 2800 result = snd_pcm_capture_ioctl1(NULL, substream, cmd, 2801 (void __user *)arg); 2802 break; 2803 default: 2804 result = -EINVAL; 2805 break; 2806 } 2807 snd_leave_user(fs); 2808 return result; 2809 } 2810 2811 EXPORT_SYMBOL(snd_pcm_kernel_ioctl); 2812 2813 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count, 2814 loff_t * offset) 2815 { 2816 struct snd_pcm_file *pcm_file; 2817 struct snd_pcm_substream *substream; 2818 struct snd_pcm_runtime *runtime; 2819 snd_pcm_sframes_t result; 2820 2821 pcm_file = file->private_data; 2822 substream = pcm_file->substream; 2823 snd_assert(substream != NULL, return -ENXIO); 2824 runtime = substream->runtime; 2825 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2826 return -EBADFD; 2827 if (!frame_aligned(runtime, count)) 2828 return -EINVAL; 2829 count = bytes_to_frames(runtime, count); 2830 result = snd_pcm_lib_read(substream, buf, count); 2831 if (result > 0) 2832 result = frames_to_bytes(runtime, result); 2833 return result; 2834 } 2835 2836 static ssize_t snd_pcm_write(struct file *file, const char __user *buf, 2837 size_t count, loff_t * offset) 2838 { 2839 struct snd_pcm_file *pcm_file; 2840 struct snd_pcm_substream *substream; 2841 struct snd_pcm_runtime *runtime; 2842 snd_pcm_sframes_t result; 2843 2844 pcm_file = file->private_data; 2845 substream = pcm_file->substream; 2846 snd_assert(substream != NULL, result = -ENXIO; goto end); 2847 runtime = substream->runtime; 2848 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 2849 result = -EBADFD; 2850 goto end; 2851 } 2852 if (!frame_aligned(runtime, count)) { 2853 result = -EINVAL; 2854 goto end; 2855 } 2856 count = bytes_to_frames(runtime, count); 2857 result = snd_pcm_lib_write(substream, buf, count); 2858 if (result > 0) 2859 result = frames_to_bytes(runtime, result); 2860 end: 2861 return result; 2862 } 2863 2864 static ssize_t snd_pcm_readv(struct file *file, const struct iovec *_vector, 2865 unsigned long count, loff_t * offset) 2866 2867 { 2868 struct snd_pcm_file *pcm_file; 2869 struct snd_pcm_substream *substream; 2870 struct snd_pcm_runtime *runtime; 2871 snd_pcm_sframes_t result; 2872 unsigned long i; 2873 void __user **bufs; 2874 snd_pcm_uframes_t frames; 2875 2876 pcm_file = file->private_data; 2877 substream = pcm_file->substream; 2878 snd_assert(substream != NULL, return -ENXIO); 2879 runtime = substream->runtime; 2880 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2881 return -EBADFD; 2882 if (count > 1024 || count != runtime->channels) 2883 return -EINVAL; 2884 if (!frame_aligned(runtime, _vector->iov_len)) 2885 return -EINVAL; 2886 frames = bytes_to_samples(runtime, _vector->iov_len); 2887 bufs = kmalloc(sizeof(void *) * count, GFP_KERNEL); 2888 if (bufs == NULL) 2889 return -ENOMEM; 2890 for (i = 0; i < count; ++i) 2891 bufs[i] = _vector[i].iov_base; 2892 result = snd_pcm_lib_readv(substream, bufs, frames); 2893 if (result > 0) 2894 result = frames_to_bytes(runtime, result); 2895 kfree(bufs); 2896 return result; 2897 } 2898 2899 static ssize_t snd_pcm_writev(struct file *file, const struct iovec *_vector, 2900 unsigned long count, loff_t * offset) 2901 { 2902 struct snd_pcm_file *pcm_file; 2903 struct snd_pcm_substream *substream; 2904 struct snd_pcm_runtime *runtime; 2905 snd_pcm_sframes_t result; 2906 unsigned long i; 2907 void __user **bufs; 2908 snd_pcm_uframes_t frames; 2909 2910 pcm_file = file->private_data; 2911 substream = pcm_file->substream; 2912 snd_assert(substream != NULL, result = -ENXIO; goto end); 2913 runtime = substream->runtime; 2914 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 2915 result = -EBADFD; 2916 goto end; 2917 } 2918 if (count > 128 || count != runtime->channels || 2919 !frame_aligned(runtime, _vector->iov_len)) { 2920 result = -EINVAL; 2921 goto end; 2922 } 2923 frames = bytes_to_samples(runtime, _vector->iov_len); 2924 bufs = kmalloc(sizeof(void *) * count, GFP_KERNEL); 2925 if (bufs == NULL) 2926 return -ENOMEM; 2927 for (i = 0; i < count; ++i) 2928 bufs[i] = _vector[i].iov_base; 2929 result = snd_pcm_lib_writev(substream, bufs, frames); 2930 if (result > 0) 2931 result = frames_to_bytes(runtime, result); 2932 kfree(bufs); 2933 end: 2934 return result; 2935 } 2936 2937 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait) 2938 { 2939 struct snd_pcm_file *pcm_file; 2940 struct snd_pcm_substream *substream; 2941 struct snd_pcm_runtime *runtime; 2942 unsigned int mask; 2943 snd_pcm_uframes_t avail; 2944 2945 pcm_file = file->private_data; 2946 2947 substream = pcm_file->substream; 2948 snd_assert(substream != NULL, return -ENXIO); 2949 runtime = substream->runtime; 2950 2951 poll_wait(file, &runtime->sleep, wait); 2952 2953 snd_pcm_stream_lock_irq(substream); 2954 avail = snd_pcm_playback_avail(runtime); 2955 switch (runtime->status->state) { 2956 case SNDRV_PCM_STATE_RUNNING: 2957 case SNDRV_PCM_STATE_PREPARED: 2958 case SNDRV_PCM_STATE_PAUSED: 2959 if (avail >= runtime->control->avail_min) { 2960 mask = POLLOUT | POLLWRNORM; 2961 break; 2962 } 2963 /* Fall through */ 2964 case SNDRV_PCM_STATE_DRAINING: 2965 mask = 0; 2966 break; 2967 default: 2968 mask = POLLOUT | POLLWRNORM | POLLERR; 2969 break; 2970 } 2971 snd_pcm_stream_unlock_irq(substream); 2972 return mask; 2973 } 2974 2975 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait) 2976 { 2977 struct snd_pcm_file *pcm_file; 2978 struct snd_pcm_substream *substream; 2979 struct snd_pcm_runtime *runtime; 2980 unsigned int mask; 2981 snd_pcm_uframes_t avail; 2982 2983 pcm_file = file->private_data; 2984 2985 substream = pcm_file->substream; 2986 snd_assert(substream != NULL, return -ENXIO); 2987 runtime = substream->runtime; 2988 2989 poll_wait(file, &runtime->sleep, wait); 2990 2991 snd_pcm_stream_lock_irq(substream); 2992 avail = snd_pcm_capture_avail(runtime); 2993 switch (runtime->status->state) { 2994 case SNDRV_PCM_STATE_RUNNING: 2995 case SNDRV_PCM_STATE_PREPARED: 2996 case SNDRV_PCM_STATE_PAUSED: 2997 if (avail >= runtime->control->avail_min) { 2998 mask = POLLIN | POLLRDNORM; 2999 break; 3000 } 3001 mask = 0; 3002 break; 3003 case SNDRV_PCM_STATE_DRAINING: 3004 if (avail > 0) { 3005 mask = POLLIN | POLLRDNORM; 3006 break; 3007 } 3008 /* Fall through */ 3009 default: 3010 mask = POLLIN | POLLRDNORM | POLLERR; 3011 break; 3012 } 3013 snd_pcm_stream_unlock_irq(substream); 3014 return mask; 3015 } 3016 3017 /* 3018 * mmap support 3019 */ 3020 3021 /* 3022 * Only on coherent architectures, we can mmap the status and the control records 3023 * for effcient data transfer. On others, we have to use HWSYNC ioctl... 3024 */ 3025 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) 3026 /* 3027 * mmap status record 3028 */ 3029 static struct page * snd_pcm_mmap_status_nopage(struct vm_area_struct *area, 3030 unsigned long address, int *type) 3031 { 3032 struct snd_pcm_substream *substream = area->vm_private_data; 3033 struct snd_pcm_runtime *runtime; 3034 struct page * page; 3035 3036 if (substream == NULL) 3037 return NOPAGE_OOM; 3038 runtime = substream->runtime; 3039 page = virt_to_page(runtime->status); 3040 get_page(page); 3041 if (type) 3042 *type = VM_FAULT_MINOR; 3043 return page; 3044 } 3045 3046 static struct vm_operations_struct snd_pcm_vm_ops_status = 3047 { 3048 .nopage = snd_pcm_mmap_status_nopage, 3049 }; 3050 3051 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, 3052 struct vm_area_struct *area) 3053 { 3054 struct snd_pcm_runtime *runtime; 3055 long size; 3056 if (!(area->vm_flags & VM_READ)) 3057 return -EINVAL; 3058 runtime = substream->runtime; 3059 snd_assert(runtime != NULL, return -EAGAIN); 3060 size = area->vm_end - area->vm_start; 3061 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))) 3062 return -EINVAL; 3063 area->vm_ops = &snd_pcm_vm_ops_status; 3064 area->vm_private_data = substream; 3065 area->vm_flags |= VM_RESERVED; 3066 return 0; 3067 } 3068 3069 /* 3070 * mmap control record 3071 */ 3072 static struct page * snd_pcm_mmap_control_nopage(struct vm_area_struct *area, 3073 unsigned long address, int *type) 3074 { 3075 struct snd_pcm_substream *substream = area->vm_private_data; 3076 struct snd_pcm_runtime *runtime; 3077 struct page * page; 3078 3079 if (substream == NULL) 3080 return NOPAGE_OOM; 3081 runtime = substream->runtime; 3082 page = virt_to_page(runtime->control); 3083 get_page(page); 3084 if (type) 3085 *type = VM_FAULT_MINOR; 3086 return page; 3087 } 3088 3089 static struct vm_operations_struct snd_pcm_vm_ops_control = 3090 { 3091 .nopage = snd_pcm_mmap_control_nopage, 3092 }; 3093 3094 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, 3095 struct vm_area_struct *area) 3096 { 3097 struct snd_pcm_runtime *runtime; 3098 long size; 3099 if (!(area->vm_flags & VM_READ)) 3100 return -EINVAL; 3101 runtime = substream->runtime; 3102 snd_assert(runtime != NULL, return -EAGAIN); 3103 size = area->vm_end - area->vm_start; 3104 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))) 3105 return -EINVAL; 3106 area->vm_ops = &snd_pcm_vm_ops_control; 3107 area->vm_private_data = substream; 3108 area->vm_flags |= VM_RESERVED; 3109 return 0; 3110 } 3111 #else /* ! coherent mmap */ 3112 /* 3113 * don't support mmap for status and control records. 3114 */ 3115 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, 3116 struct vm_area_struct *area) 3117 { 3118 return -ENXIO; 3119 } 3120 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, 3121 struct vm_area_struct *area) 3122 { 3123 return -ENXIO; 3124 } 3125 #endif /* coherent mmap */ 3126 3127 /* 3128 * nopage callback for mmapping a RAM page 3129 */ 3130 static struct page *snd_pcm_mmap_data_nopage(struct vm_area_struct *area, 3131 unsigned long address, int *type) 3132 { 3133 struct snd_pcm_substream *substream = area->vm_private_data; 3134 struct snd_pcm_runtime *runtime; 3135 unsigned long offset; 3136 struct page * page; 3137 void *vaddr; 3138 size_t dma_bytes; 3139 3140 if (substream == NULL) 3141 return NOPAGE_OOM; 3142 runtime = substream->runtime; 3143 offset = area->vm_pgoff << PAGE_SHIFT; 3144 offset += address - area->vm_start; 3145 snd_assert((offset % PAGE_SIZE) == 0, return NOPAGE_OOM); 3146 dma_bytes = PAGE_ALIGN(runtime->dma_bytes); 3147 if (offset > dma_bytes - PAGE_SIZE) 3148 return NOPAGE_SIGBUS; 3149 if (substream->ops->page) { 3150 page = substream->ops->page(substream, offset); 3151 if (! page) 3152 return NOPAGE_OOM; 3153 } else { 3154 vaddr = runtime->dma_area + offset; 3155 page = virt_to_page(vaddr); 3156 } 3157 get_page(page); 3158 if (type) 3159 *type = VM_FAULT_MINOR; 3160 return page; 3161 } 3162 3163 static struct vm_operations_struct snd_pcm_vm_ops_data = 3164 { 3165 .open = snd_pcm_mmap_data_open, 3166 .close = snd_pcm_mmap_data_close, 3167 .nopage = snd_pcm_mmap_data_nopage, 3168 }; 3169 3170 /* 3171 * mmap the DMA buffer on RAM 3172 */ 3173 static int snd_pcm_default_mmap(struct snd_pcm_substream *substream, 3174 struct vm_area_struct *area) 3175 { 3176 area->vm_ops = &snd_pcm_vm_ops_data; 3177 area->vm_private_data = substream; 3178 area->vm_flags |= VM_RESERVED; 3179 atomic_inc(&substream->mmap_count); 3180 return 0; 3181 } 3182 3183 /* 3184 * mmap the DMA buffer on I/O memory area 3185 */ 3186 #if SNDRV_PCM_INFO_MMAP_IOMEM 3187 static struct vm_operations_struct snd_pcm_vm_ops_data_mmio = 3188 { 3189 .open = snd_pcm_mmap_data_open, 3190 .close = snd_pcm_mmap_data_close, 3191 }; 3192 3193 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, 3194 struct vm_area_struct *area) 3195 { 3196 long size; 3197 unsigned long offset; 3198 3199 #ifdef pgprot_noncached 3200 area->vm_page_prot = pgprot_noncached(area->vm_page_prot); 3201 #endif 3202 area->vm_ops = &snd_pcm_vm_ops_data_mmio; 3203 area->vm_private_data = substream; 3204 area->vm_flags |= VM_IO; 3205 size = area->vm_end - area->vm_start; 3206 offset = area->vm_pgoff << PAGE_SHIFT; 3207 if (io_remap_pfn_range(area, area->vm_start, 3208 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT, 3209 size, area->vm_page_prot)) 3210 return -EAGAIN; 3211 atomic_inc(&substream->mmap_count); 3212 return 0; 3213 } 3214 3215 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem); 3216 #endif /* SNDRV_PCM_INFO_MMAP */ 3217 3218 /* 3219 * mmap DMA buffer 3220 */ 3221 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, 3222 struct vm_area_struct *area) 3223 { 3224 struct snd_pcm_runtime *runtime; 3225 long size; 3226 unsigned long offset; 3227 size_t dma_bytes; 3228 3229 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 3230 if (!(area->vm_flags & (VM_WRITE|VM_READ))) 3231 return -EINVAL; 3232 } else { 3233 if (!(area->vm_flags & VM_READ)) 3234 return -EINVAL; 3235 } 3236 runtime = substream->runtime; 3237 snd_assert(runtime != NULL, return -EAGAIN); 3238 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 3239 return -EBADFD; 3240 if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) 3241 return -ENXIO; 3242 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || 3243 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) 3244 return -EINVAL; 3245 size = area->vm_end - area->vm_start; 3246 offset = area->vm_pgoff << PAGE_SHIFT; 3247 dma_bytes = PAGE_ALIGN(runtime->dma_bytes); 3248 if ((size_t)size > dma_bytes) 3249 return -EINVAL; 3250 if (offset > dma_bytes - size) 3251 return -EINVAL; 3252 3253 if (substream->ops->mmap) 3254 return substream->ops->mmap(substream, area); 3255 else 3256 return snd_pcm_default_mmap(substream, area); 3257 } 3258 3259 EXPORT_SYMBOL(snd_pcm_mmap_data); 3260 3261 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area) 3262 { 3263 struct snd_pcm_file * pcm_file; 3264 struct snd_pcm_substream *substream; 3265 unsigned long offset; 3266 3267 pcm_file = file->private_data; 3268 substream = pcm_file->substream; 3269 snd_assert(substream != NULL, return -ENXIO); 3270 3271 offset = area->vm_pgoff << PAGE_SHIFT; 3272 switch (offset) { 3273 case SNDRV_PCM_MMAP_OFFSET_STATUS: 3274 if (substream->no_mmap_ctrl) 3275 return -ENXIO; 3276 return snd_pcm_mmap_status(substream, file, area); 3277 case SNDRV_PCM_MMAP_OFFSET_CONTROL: 3278 if (substream->no_mmap_ctrl) 3279 return -ENXIO; 3280 return snd_pcm_mmap_control(substream, file, area); 3281 default: 3282 return snd_pcm_mmap_data(substream, file, area); 3283 } 3284 return 0; 3285 } 3286 3287 static int snd_pcm_fasync(int fd, struct file * file, int on) 3288 { 3289 struct snd_pcm_file * pcm_file; 3290 struct snd_pcm_substream *substream; 3291 struct snd_pcm_runtime *runtime; 3292 int err; 3293 3294 pcm_file = file->private_data; 3295 substream = pcm_file->substream; 3296 snd_assert(substream != NULL, return -ENXIO); 3297 runtime = substream->runtime; 3298 3299 err = fasync_helper(fd, file, on, &runtime->fasync); 3300 if (err < 0) 3301 return err; 3302 return 0; 3303 } 3304 3305 /* 3306 * ioctl32 compat 3307 */ 3308 #ifdef CONFIG_COMPAT 3309 #include "pcm_compat.c" 3310 #else 3311 #define snd_pcm_ioctl_compat NULL 3312 #endif 3313 3314 /* 3315 * To be removed helpers to keep binary compatibility 3316 */ 3317 3318 #ifdef CONFIG_SND_SUPPORT_OLD_API 3319 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5)) 3320 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5)) 3321 3322 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params, 3323 struct snd_pcm_hw_params_old *oparams) 3324 { 3325 unsigned int i; 3326 3327 memset(params, 0, sizeof(*params)); 3328 params->flags = oparams->flags; 3329 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) 3330 params->masks[i].bits[0] = oparams->masks[i]; 3331 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals)); 3332 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask); 3333 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask); 3334 params->info = oparams->info; 3335 params->msbits = oparams->msbits; 3336 params->rate_num = oparams->rate_num; 3337 params->rate_den = oparams->rate_den; 3338 params->fifo_size = oparams->fifo_size; 3339 } 3340 3341 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams, 3342 struct snd_pcm_hw_params *params) 3343 { 3344 unsigned int i; 3345 3346 memset(oparams, 0, sizeof(*oparams)); 3347 oparams->flags = params->flags; 3348 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) 3349 oparams->masks[i] = params->masks[i].bits[0]; 3350 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals)); 3351 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask); 3352 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask); 3353 oparams->info = params->info; 3354 oparams->msbits = params->msbits; 3355 oparams->rate_num = params->rate_num; 3356 oparams->rate_den = params->rate_den; 3357 oparams->fifo_size = params->fifo_size; 3358 } 3359 3360 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, 3361 struct snd_pcm_hw_params_old __user * _oparams) 3362 { 3363 struct snd_pcm_hw_params *params; 3364 struct snd_pcm_hw_params_old *oparams = NULL; 3365 int err; 3366 3367 params = kmalloc(sizeof(*params), GFP_KERNEL); 3368 if (!params) { 3369 err = -ENOMEM; 3370 goto out; 3371 } 3372 oparams = kmalloc(sizeof(*oparams), GFP_KERNEL); 3373 if (!oparams) { 3374 err = -ENOMEM; 3375 goto out; 3376 } 3377 3378 if (copy_from_user(oparams, _oparams, sizeof(*oparams))) { 3379 err = -EFAULT; 3380 goto out; 3381 } 3382 snd_pcm_hw_convert_from_old_params(params, oparams); 3383 err = snd_pcm_hw_refine(substream, params); 3384 snd_pcm_hw_convert_to_old_params(oparams, params); 3385 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { 3386 if (!err) 3387 err = -EFAULT; 3388 } 3389 out: 3390 kfree(params); 3391 kfree(oparams); 3392 return err; 3393 } 3394 3395 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, 3396 struct snd_pcm_hw_params_old __user * _oparams) 3397 { 3398 struct snd_pcm_hw_params *params; 3399 struct snd_pcm_hw_params_old *oparams = NULL; 3400 int err; 3401 3402 params = kmalloc(sizeof(*params), GFP_KERNEL); 3403 if (!params) { 3404 err = -ENOMEM; 3405 goto out; 3406 } 3407 oparams = kmalloc(sizeof(*oparams), GFP_KERNEL); 3408 if (!oparams) { 3409 err = -ENOMEM; 3410 goto out; 3411 } 3412 if (copy_from_user(oparams, _oparams, sizeof(*oparams))) { 3413 err = -EFAULT; 3414 goto out; 3415 } 3416 snd_pcm_hw_convert_from_old_params(params, oparams); 3417 err = snd_pcm_hw_params(substream, params); 3418 snd_pcm_hw_convert_to_old_params(oparams, params); 3419 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { 3420 if (!err) 3421 err = -EFAULT; 3422 } 3423 out: 3424 kfree(params); 3425 kfree(oparams); 3426 return err; 3427 } 3428 #endif /* CONFIG_SND_SUPPORT_OLD_API */ 3429 3430 /* 3431 * Register section 3432 */ 3433 3434 struct file_operations snd_pcm_f_ops[2] = { 3435 { 3436 .owner = THIS_MODULE, 3437 .write = snd_pcm_write, 3438 .writev = snd_pcm_writev, 3439 .open = snd_pcm_playback_open, 3440 .release = snd_pcm_release, 3441 .poll = snd_pcm_playback_poll, 3442 .unlocked_ioctl = snd_pcm_playback_ioctl, 3443 .compat_ioctl = snd_pcm_ioctl_compat, 3444 .mmap = snd_pcm_mmap, 3445 .fasync = snd_pcm_fasync, 3446 }, 3447 { 3448 .owner = THIS_MODULE, 3449 .read = snd_pcm_read, 3450 .readv = snd_pcm_readv, 3451 .open = snd_pcm_capture_open, 3452 .release = snd_pcm_release, 3453 .poll = snd_pcm_capture_poll, 3454 .unlocked_ioctl = snd_pcm_capture_ioctl, 3455 .compat_ioctl = snd_pcm_ioctl_compat, 3456 .mmap = snd_pcm_mmap, 3457 .fasync = snd_pcm_fasync, 3458 } 3459 }; 3460