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