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