1 /* 2 * Digital Audio (PCM) abstract layer 3 * Copyright (c) by Jaroslav Kysela <perex@suse.cz> 4 * 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 * 20 */ 21 22 #include <sound/driver.h> 23 #include <linux/mm.h> 24 #include <linux/smp_lock.h> 25 #include <linux/file.h> 26 #include <linux/slab.h> 27 #include <linux/time.h> 28 #include <linux/uio.h> 29 #include <sound/core.h> 30 #include <sound/control.h> 31 #include <sound/info.h> 32 #include <sound/pcm.h> 33 #include <sound/pcm_params.h> 34 #include <sound/timer.h> 35 #include <sound/minors.h> 36 #include <asm/io.h> 37 38 /* 39 * Compatibility 40 */ 41 42 struct snd_pcm_hw_params_old { 43 unsigned int flags; 44 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT - 45 SNDRV_PCM_HW_PARAM_ACCESS + 1]; 46 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME - 47 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1]; 48 unsigned int rmask; 49 unsigned int cmask; 50 unsigned int info; 51 unsigned int msbits; 52 unsigned int rate_num; 53 unsigned int rate_den; 54 snd_pcm_uframes_t fifo_size; 55 unsigned char reserved[64]; 56 }; 57 58 #ifdef CONFIG_SND_SUPPORT_OLD_API 59 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old) 60 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old) 61 62 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, 63 struct snd_pcm_hw_params_old __user * _oparams); 64 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, 65 struct snd_pcm_hw_params_old __user * _oparams); 66 #endif 67 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream); 68 69 /* 70 * 71 */ 72 73 DEFINE_RWLOCK(snd_pcm_link_rwlock); 74 static DECLARE_RWSEM(snd_pcm_link_rwsem); 75 76 77 static inline mm_segment_t snd_enter_user(void) 78 { 79 mm_segment_t fs = get_fs(); 80 set_fs(get_ds()); 81 return fs; 82 } 83 84 static inline void snd_leave_user(mm_segment_t fs) 85 { 86 set_fs(fs); 87 } 88 89 90 91 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info) 92 { 93 struct snd_pcm_runtime *runtime; 94 struct snd_pcm *pcm = substream->pcm; 95 struct snd_pcm_str *pstr = substream->pstr; 96 97 snd_assert(substream != NULL, return -ENXIO); 98 memset(info, 0, sizeof(*info)); 99 info->card = pcm->card->number; 100 info->device = pcm->device; 101 info->stream = substream->stream; 102 info->subdevice = substream->number; 103 strlcpy(info->id, pcm->id, sizeof(info->id)); 104 strlcpy(info->name, pcm->name, sizeof(info->name)); 105 info->dev_class = pcm->dev_class; 106 info->dev_subclass = pcm->dev_subclass; 107 info->subdevices_count = pstr->substream_count; 108 info->subdevices_avail = pstr->substream_count - pstr->substream_opened; 109 strlcpy(info->subname, substream->name, sizeof(info->subname)); 110 runtime = substream->runtime; 111 /* AB: FIXME!!! This is definitely nonsense */ 112 if (runtime) { 113 info->sync = runtime->sync; 114 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info); 115 } 116 return 0; 117 } 118 119 int snd_pcm_info_user(struct snd_pcm_substream *substream, 120 struct snd_pcm_info __user * _info) 121 { 122 struct snd_pcm_info *info; 123 int err; 124 125 info = kmalloc(sizeof(*info), GFP_KERNEL); 126 if (! info) 127 return -ENOMEM; 128 err = snd_pcm_info(substream, info); 129 if (err >= 0) { 130 if (copy_to_user(_info, info, sizeof(*info))) 131 err = -EFAULT; 132 } 133 kfree(info); 134 return err; 135 } 136 137 #undef RULES_DEBUG 138 139 #ifdef RULES_DEBUG 140 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v 141 char *snd_pcm_hw_param_names[] = { 142 HW_PARAM(ACCESS), 143 HW_PARAM(FORMAT), 144 HW_PARAM(SUBFORMAT), 145 HW_PARAM(SAMPLE_BITS), 146 HW_PARAM(FRAME_BITS), 147 HW_PARAM(CHANNELS), 148 HW_PARAM(RATE), 149 HW_PARAM(PERIOD_TIME), 150 HW_PARAM(PERIOD_SIZE), 151 HW_PARAM(PERIOD_BYTES), 152 HW_PARAM(PERIODS), 153 HW_PARAM(BUFFER_TIME), 154 HW_PARAM(BUFFER_SIZE), 155 HW_PARAM(BUFFER_BYTES), 156 HW_PARAM(TICK_TIME), 157 }; 158 #endif 159 160 int snd_pcm_hw_refine(struct snd_pcm_substream *substream, 161 struct snd_pcm_hw_params *params) 162 { 163 unsigned int k; 164 struct snd_pcm_hardware *hw; 165 struct snd_interval *i = NULL; 166 struct snd_mask *m = NULL; 167 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints; 168 unsigned int rstamps[constrs->rules_num]; 169 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1]; 170 unsigned int stamp = 2; 171 int changed, again; 172 173 params->info = 0; 174 params->fifo_size = 0; 175 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS)) 176 params->msbits = 0; 177 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) { 178 params->rate_num = 0; 179 params->rate_den = 0; 180 } 181 182 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { 183 m = hw_param_mask(params, k); 184 if (snd_mask_empty(m)) 185 return -EINVAL; 186 if (!(params->rmask & (1 << k))) 187 continue; 188 #ifdef RULES_DEBUG 189 printk("%s = ", snd_pcm_hw_param_names[k]); 190 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); 191 #endif 192 changed = snd_mask_refine(m, constrs_mask(constrs, k)); 193 #ifdef RULES_DEBUG 194 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); 195 #endif 196 if (changed) 197 params->cmask |= 1 << k; 198 if (changed < 0) 199 return changed; 200 } 201 202 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { 203 i = hw_param_interval(params, k); 204 if (snd_interval_empty(i)) 205 return -EINVAL; 206 if (!(params->rmask & (1 << k))) 207 continue; 208 #ifdef RULES_DEBUG 209 printk("%s = ", snd_pcm_hw_param_names[k]); 210 if (i->empty) 211 printk("empty"); 212 else 213 printk("%c%u %u%c", 214 i->openmin ? '(' : '[', i->min, 215 i->max, i->openmax ? ')' : ']'); 216 printk(" -> "); 217 #endif 218 changed = snd_interval_refine(i, constrs_interval(constrs, k)); 219 #ifdef RULES_DEBUG 220 if (i->empty) 221 printk("empty\n"); 222 else 223 printk("%c%u %u%c\n", 224 i->openmin ? '(' : '[', i->min, 225 i->max, i->openmax ? ')' : ']'); 226 #endif 227 if (changed) 228 params->cmask |= 1 << k; 229 if (changed < 0) 230 return changed; 231 } 232 233 for (k = 0; k < constrs->rules_num; k++) 234 rstamps[k] = 0; 235 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) 236 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0; 237 do { 238 again = 0; 239 for (k = 0; k < constrs->rules_num; k++) { 240 struct snd_pcm_hw_rule *r = &constrs->rules[k]; 241 unsigned int d; 242 int doit = 0; 243 if (r->cond && !(r->cond & params->flags)) 244 continue; 245 for (d = 0; r->deps[d] >= 0; d++) { 246 if (vstamps[r->deps[d]] > rstamps[k]) { 247 doit = 1; 248 break; 249 } 250 } 251 if (!doit) 252 continue; 253 #ifdef RULES_DEBUG 254 printk("Rule %d [%p]: ", k, r->func); 255 if (r->var >= 0) { 256 printk("%s = ", snd_pcm_hw_param_names[r->var]); 257 if (hw_is_mask(r->var)) { 258 m = hw_param_mask(params, r->var); 259 printk("%x", *m->bits); 260 } else { 261 i = hw_param_interval(params, r->var); 262 if (i->empty) 263 printk("empty"); 264 else 265 printk("%c%u %u%c", 266 i->openmin ? '(' : '[', i->min, 267 i->max, i->openmax ? ')' : ']'); 268 } 269 } 270 #endif 271 changed = r->func(params, r); 272 #ifdef RULES_DEBUG 273 if (r->var >= 0) { 274 printk(" -> "); 275 if (hw_is_mask(r->var)) 276 printk("%x", *m->bits); 277 else { 278 if (i->empty) 279 printk("empty"); 280 else 281 printk("%c%u %u%c", 282 i->openmin ? '(' : '[', i->min, 283 i->max, i->openmax ? ')' : ']'); 284 } 285 } 286 printk("\n"); 287 #endif 288 rstamps[k] = stamp; 289 if (changed && r->var >= 0) { 290 params->cmask |= (1 << r->var); 291 vstamps[r->var] = stamp; 292 again = 1; 293 } 294 if (changed < 0) 295 return changed; 296 stamp++; 297 } 298 } while (again); 299 if (!params->msbits) { 300 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); 301 if (snd_interval_single(i)) 302 params->msbits = snd_interval_value(i); 303 } 304 305 if (!params->rate_den) { 306 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); 307 if (snd_interval_single(i)) { 308 params->rate_num = snd_interval_value(i); 309 params->rate_den = 1; 310 } 311 } 312 313 hw = &substream->runtime->hw; 314 if (!params->info) 315 params->info = hw->info; 316 if (!params->fifo_size) 317 params->fifo_size = hw->fifo_size; 318 params->rmask = 0; 319 return 0; 320 } 321 322 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream, 323 struct snd_pcm_hw_params __user * _params) 324 { 325 struct snd_pcm_hw_params *params; 326 int err; 327 328 params = kmalloc(sizeof(*params), GFP_KERNEL); 329 if (!params) { 330 err = -ENOMEM; 331 goto out; 332 } 333 if (copy_from_user(params, _params, sizeof(*params))) { 334 err = -EFAULT; 335 goto out; 336 } 337 err = snd_pcm_hw_refine(substream, params); 338 if (copy_to_user(_params, params, sizeof(*params))) { 339 if (!err) 340 err = -EFAULT; 341 } 342 out: 343 kfree(params); 344 return err; 345 } 346 347 static int snd_pcm_hw_params(struct snd_pcm_substream *substream, 348 struct snd_pcm_hw_params *params) 349 { 350 struct snd_pcm_runtime *runtime; 351 int err; 352 unsigned int bits; 353 snd_pcm_uframes_t frames; 354 355 snd_assert(substream != NULL, return -ENXIO); 356 runtime = substream->runtime; 357 snd_assert(runtime != NULL, return -ENXIO); 358 snd_pcm_stream_lock_irq(substream); 359 switch (runtime->status->state) { 360 case SNDRV_PCM_STATE_OPEN: 361 case SNDRV_PCM_STATE_SETUP: 362 case SNDRV_PCM_STATE_PREPARED: 363 break; 364 default: 365 snd_pcm_stream_unlock_irq(substream); 366 return -EBADFD; 367 } 368 snd_pcm_stream_unlock_irq(substream); 369 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 370 if (!substream->oss.oss) 371 #endif 372 if (atomic_read(&runtime->mmap_count)) 373 return -EBADFD; 374 375 params->rmask = ~0U; 376 err = snd_pcm_hw_refine(substream, params); 377 if (err < 0) 378 goto _error; 379 380 err = snd_pcm_hw_params_choose(substream, params); 381 if (err < 0) 382 goto _error; 383 384 if (substream->ops->hw_params != NULL) { 385 err = substream->ops->hw_params(substream, params); 386 if (err < 0) 387 goto _error; 388 } 389 390 runtime->access = params_access(params); 391 runtime->format = params_format(params); 392 runtime->subformat = params_subformat(params); 393 runtime->channels = params_channels(params); 394 runtime->rate = params_rate(params); 395 runtime->period_size = params_period_size(params); 396 runtime->periods = params_periods(params); 397 runtime->buffer_size = params_buffer_size(params); 398 runtime->tick_time = params_tick_time(params); 399 runtime->info = params->info; 400 runtime->rate_num = params->rate_num; 401 runtime->rate_den = params->rate_den; 402 403 bits = snd_pcm_format_physical_width(runtime->format); 404 runtime->sample_bits = bits; 405 bits *= runtime->channels; 406 runtime->frame_bits = bits; 407 frames = 1; 408 while (bits % 8 != 0) { 409 bits *= 2; 410 frames *= 2; 411 } 412 runtime->byte_align = bits / 8; 413 runtime->min_align = frames; 414 415 /* Default sw params */ 416 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; 417 runtime->period_step = 1; 418 runtime->sleep_min = 0; 419 runtime->control->avail_min = runtime->period_size; 420 runtime->xfer_align = runtime->period_size; 421 runtime->start_threshold = 1; 422 runtime->stop_threshold = runtime->buffer_size; 423 runtime->silence_threshold = 0; 424 runtime->silence_size = 0; 425 runtime->boundary = runtime->buffer_size; 426 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size) 427 runtime->boundary *= 2; 428 429 snd_pcm_timer_resolution_change(substream); 430 runtime->status->state = SNDRV_PCM_STATE_SETUP; 431 return 0; 432 _error: 433 /* hardware might be unuseable from this time, 434 so we force application to retry to set 435 the correct hardware parameter settings */ 436 runtime->status->state = SNDRV_PCM_STATE_OPEN; 437 if (substream->ops->hw_free != NULL) 438 substream->ops->hw_free(substream); 439 return err; 440 } 441 442 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream, 443 struct snd_pcm_hw_params __user * _params) 444 { 445 struct snd_pcm_hw_params *params; 446 int err; 447 448 params = kmalloc(sizeof(*params), GFP_KERNEL); 449 if (!params) { 450 err = -ENOMEM; 451 goto out; 452 } 453 if (copy_from_user(params, _params, sizeof(*params))) { 454 err = -EFAULT; 455 goto out; 456 } 457 err = snd_pcm_hw_params(substream, params); 458 if (copy_to_user(_params, params, sizeof(*params))) { 459 if (!err) 460 err = -EFAULT; 461 } 462 out: 463 kfree(params); 464 return err; 465 } 466 467 static int snd_pcm_hw_free(struct snd_pcm_substream *substream) 468 { 469 struct snd_pcm_runtime *runtime; 470 int result = 0; 471 472 snd_assert(substream != NULL, return -ENXIO); 473 runtime = substream->runtime; 474 snd_assert(runtime != NULL, return -ENXIO); 475 snd_pcm_stream_lock_irq(substream); 476 switch (runtime->status->state) { 477 case SNDRV_PCM_STATE_SETUP: 478 case SNDRV_PCM_STATE_PREPARED: 479 break; 480 default: 481 snd_pcm_stream_unlock_irq(substream); 482 return -EBADFD; 483 } 484 snd_pcm_stream_unlock_irq(substream); 485 if (atomic_read(&runtime->mmap_count)) 486 return -EBADFD; 487 if (substream->ops->hw_free) 488 result = substream->ops->hw_free(substream); 489 runtime->status->state = SNDRV_PCM_STATE_OPEN; 490 return result; 491 } 492 493 static int snd_pcm_sw_params(struct snd_pcm_substream *substream, 494 struct snd_pcm_sw_params *params) 495 { 496 struct snd_pcm_runtime *runtime; 497 498 snd_assert(substream != NULL, return -ENXIO); 499 runtime = substream->runtime; 500 snd_assert(runtime != NULL, return -ENXIO); 501 snd_pcm_stream_lock_irq(substream); 502 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 503 snd_pcm_stream_unlock_irq(substream); 504 return -EBADFD; 505 } 506 snd_pcm_stream_unlock_irq(substream); 507 508 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST) 509 return -EINVAL; 510 if (params->avail_min == 0) 511 return -EINVAL; 512 if (params->xfer_align == 0 || 513 params->xfer_align % runtime->min_align != 0) 514 return -EINVAL; 515 if (params->silence_size >= runtime->boundary) { 516 if (params->silence_threshold != 0) 517 return -EINVAL; 518 } else { 519 if (params->silence_size > params->silence_threshold) 520 return -EINVAL; 521 if (params->silence_threshold > runtime->buffer_size) 522 return -EINVAL; 523 } 524 snd_pcm_stream_lock_irq(substream); 525 runtime->tstamp_mode = params->tstamp_mode; 526 runtime->sleep_min = params->sleep_min; 527 runtime->period_step = params->period_step; 528 runtime->control->avail_min = params->avail_min; 529 runtime->start_threshold = params->start_threshold; 530 runtime->stop_threshold = params->stop_threshold; 531 runtime->silence_threshold = params->silence_threshold; 532 runtime->silence_size = params->silence_size; 533 runtime->xfer_align = params->xfer_align; 534 params->boundary = runtime->boundary; 535 if (snd_pcm_running(substream)) { 536 if (runtime->sleep_min) 537 snd_pcm_tick_prepare(substream); 538 else 539 snd_pcm_tick_set(substream, 0); 540 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 541 runtime->silence_size > 0) 542 snd_pcm_playback_silence(substream, ULONG_MAX); 543 wake_up(&runtime->sleep); 544 } 545 snd_pcm_stream_unlock_irq(substream); 546 return 0; 547 } 548 549 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream, 550 struct snd_pcm_sw_params __user * _params) 551 { 552 struct snd_pcm_sw_params params; 553 int err; 554 if (copy_from_user(¶ms, _params, sizeof(params))) 555 return -EFAULT; 556 err = snd_pcm_sw_params(substream, ¶ms); 557 if (copy_to_user(_params, ¶ms, sizeof(params))) 558 return -EFAULT; 559 return err; 560 } 561 562 int snd_pcm_status(struct snd_pcm_substream *substream, 563 struct snd_pcm_status *status) 564 { 565 struct snd_pcm_runtime *runtime = substream->runtime; 566 567 snd_pcm_stream_lock_irq(substream); 568 status->state = runtime->status->state; 569 status->suspended_state = runtime->status->suspended_state; 570 if (status->state == SNDRV_PCM_STATE_OPEN) 571 goto _end; 572 status->trigger_tstamp = runtime->trigger_tstamp; 573 if (snd_pcm_running(substream)) { 574 snd_pcm_update_hw_ptr(substream); 575 if (runtime->tstamp_mode & SNDRV_PCM_TSTAMP_MMAP) 576 status->tstamp = runtime->status->tstamp; 577 else 578 getnstimeofday(&status->tstamp); 579 } else 580 getnstimeofday(&status->tstamp); 581 status->appl_ptr = runtime->control->appl_ptr; 582 status->hw_ptr = runtime->status->hw_ptr; 583 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 584 status->avail = snd_pcm_playback_avail(runtime); 585 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING || 586 runtime->status->state == SNDRV_PCM_STATE_DRAINING) 587 status->delay = runtime->buffer_size - status->avail; 588 else 589 status->delay = 0; 590 } else { 591 status->avail = snd_pcm_capture_avail(runtime); 592 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) 593 status->delay = status->avail; 594 else 595 status->delay = 0; 596 } 597 status->avail_max = runtime->avail_max; 598 status->overrange = runtime->overrange; 599 runtime->avail_max = 0; 600 runtime->overrange = 0; 601 _end: 602 snd_pcm_stream_unlock_irq(substream); 603 return 0; 604 } 605 606 static int snd_pcm_status_user(struct snd_pcm_substream *substream, 607 struct snd_pcm_status __user * _status) 608 { 609 struct snd_pcm_status status; 610 struct snd_pcm_runtime *runtime; 611 int res; 612 613 snd_assert(substream != NULL, return -ENXIO); 614 runtime = substream->runtime; 615 memset(&status, 0, sizeof(status)); 616 res = snd_pcm_status(substream, &status); 617 if (res < 0) 618 return res; 619 if (copy_to_user(_status, &status, sizeof(status))) 620 return -EFAULT; 621 return 0; 622 } 623 624 static int snd_pcm_channel_info(struct snd_pcm_substream *substream, 625 struct snd_pcm_channel_info * info) 626 { 627 struct snd_pcm_runtime *runtime; 628 unsigned int channel; 629 630 snd_assert(substream != NULL, return -ENXIO); 631 channel = info->channel; 632 runtime = substream->runtime; 633 snd_pcm_stream_lock_irq(substream); 634 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 635 snd_pcm_stream_unlock_irq(substream); 636 return -EBADFD; 637 } 638 snd_pcm_stream_unlock_irq(substream); 639 if (channel >= runtime->channels) 640 return -EINVAL; 641 memset(info, 0, sizeof(*info)); 642 info->channel = channel; 643 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info); 644 } 645 646 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream, 647 struct snd_pcm_channel_info __user * _info) 648 { 649 struct snd_pcm_channel_info info; 650 int res; 651 652 if (copy_from_user(&info, _info, sizeof(info))) 653 return -EFAULT; 654 res = snd_pcm_channel_info(substream, &info); 655 if (res < 0) 656 return res; 657 if (copy_to_user(_info, &info, sizeof(info))) 658 return -EFAULT; 659 return 0; 660 } 661 662 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream) 663 { 664 struct snd_pcm_runtime *runtime = substream->runtime; 665 if (runtime->trigger_master == NULL) 666 return; 667 if (runtime->trigger_master == substream) { 668 getnstimeofday(&runtime->trigger_tstamp); 669 } else { 670 snd_pcm_trigger_tstamp(runtime->trigger_master); 671 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp; 672 } 673 runtime->trigger_master = NULL; 674 } 675 676 struct action_ops { 677 int (*pre_action)(struct snd_pcm_substream *substream, int state); 678 int (*do_action)(struct snd_pcm_substream *substream, int state); 679 void (*undo_action)(struct snd_pcm_substream *substream, int state); 680 void (*post_action)(struct snd_pcm_substream *substream, int state); 681 }; 682 683 /* 684 * this functions is core for handling of linked stream 685 * Note: the stream state might be changed also on failure 686 * Note2: call with calling stream lock + link lock 687 */ 688 static int snd_pcm_action_group(struct action_ops *ops, 689 struct snd_pcm_substream *substream, 690 int state, int do_lock) 691 { 692 struct list_head *pos; 693 struct snd_pcm_substream *s = NULL; 694 struct snd_pcm_substream *s1; 695 int res = 0; 696 697 snd_pcm_group_for_each(pos, substream) { 698 s = snd_pcm_group_substream_entry(pos); 699 if (do_lock && s != substream) 700 spin_lock(&s->self_group.lock); 701 res = ops->pre_action(s, state); 702 if (res < 0) 703 goto _unlock; 704 } 705 snd_pcm_group_for_each(pos, substream) { 706 s = snd_pcm_group_substream_entry(pos); 707 res = ops->do_action(s, state); 708 if (res < 0) { 709 if (ops->undo_action) { 710 snd_pcm_group_for_each(pos, substream) { 711 s1 = snd_pcm_group_substream_entry(pos); 712 if (s1 == s) /* failed stream */ 713 break; 714 ops->undo_action(s1, state); 715 } 716 } 717 s = NULL; /* unlock all */ 718 goto _unlock; 719 } 720 } 721 snd_pcm_group_for_each(pos, substream) { 722 s = snd_pcm_group_substream_entry(pos); 723 ops->post_action(s, state); 724 } 725 _unlock: 726 if (do_lock) { 727 /* unlock streams */ 728 snd_pcm_group_for_each(pos, substream) { 729 s1 = snd_pcm_group_substream_entry(pos); 730 if (s1 != substream) 731 spin_unlock(&s1->self_group.lock); 732 if (s1 == s) /* end */ 733 break; 734 } 735 } 736 return res; 737 } 738 739 /* 740 * Note: call with stream lock 741 */ 742 static int snd_pcm_action_single(struct action_ops *ops, 743 struct snd_pcm_substream *substream, 744 int state) 745 { 746 int res; 747 748 res = ops->pre_action(substream, state); 749 if (res < 0) 750 return res; 751 res = ops->do_action(substream, state); 752 if (res == 0) 753 ops->post_action(substream, state); 754 else if (ops->undo_action) 755 ops->undo_action(substream, state); 756 return res; 757 } 758 759 /* 760 * Note: call with stream lock 761 */ 762 static int snd_pcm_action(struct action_ops *ops, 763 struct snd_pcm_substream *substream, 764 int state) 765 { 766 int res; 767 768 if (snd_pcm_stream_linked(substream)) { 769 if (!spin_trylock(&substream->group->lock)) { 770 spin_unlock(&substream->self_group.lock); 771 spin_lock(&substream->group->lock); 772 spin_lock(&substream->self_group.lock); 773 } 774 res = snd_pcm_action_group(ops, substream, state, 1); 775 spin_unlock(&substream->group->lock); 776 } else { 777 res = snd_pcm_action_single(ops, substream, state); 778 } 779 return res; 780 } 781 782 /* 783 * Note: don't use any locks before 784 */ 785 static int snd_pcm_action_lock_irq(struct action_ops *ops, 786 struct snd_pcm_substream *substream, 787 int state) 788 { 789 int res; 790 791 read_lock_irq(&snd_pcm_link_rwlock); 792 if (snd_pcm_stream_linked(substream)) { 793 spin_lock(&substream->group->lock); 794 spin_lock(&substream->self_group.lock); 795 res = snd_pcm_action_group(ops, substream, state, 1); 796 spin_unlock(&substream->self_group.lock); 797 spin_unlock(&substream->group->lock); 798 } else { 799 spin_lock(&substream->self_group.lock); 800 res = snd_pcm_action_single(ops, substream, state); 801 spin_unlock(&substream->self_group.lock); 802 } 803 read_unlock_irq(&snd_pcm_link_rwlock); 804 return res; 805 } 806 807 /* 808 */ 809 static int snd_pcm_action_nonatomic(struct action_ops *ops, 810 struct snd_pcm_substream *substream, 811 int state) 812 { 813 int res; 814 815 down_read(&snd_pcm_link_rwsem); 816 if (snd_pcm_stream_linked(substream)) 817 res = snd_pcm_action_group(ops, substream, state, 0); 818 else 819 res = snd_pcm_action_single(ops, substream, state); 820 up_read(&snd_pcm_link_rwsem); 821 return res; 822 } 823 824 /* 825 * start callbacks 826 */ 827 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state) 828 { 829 struct snd_pcm_runtime *runtime = substream->runtime; 830 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED) 831 return -EBADFD; 832 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 833 !snd_pcm_playback_data(substream)) 834 return -EPIPE; 835 runtime->trigger_master = substream; 836 return 0; 837 } 838 839 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state) 840 { 841 if (substream->runtime->trigger_master != substream) 842 return 0; 843 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START); 844 } 845 846 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state) 847 { 848 if (substream->runtime->trigger_master == substream) 849 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); 850 } 851 852 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state) 853 { 854 struct snd_pcm_runtime *runtime = substream->runtime; 855 snd_pcm_trigger_tstamp(substream); 856 runtime->status->state = state; 857 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 858 runtime->silence_size > 0) 859 snd_pcm_playback_silence(substream, ULONG_MAX); 860 if (runtime->sleep_min) 861 snd_pcm_tick_prepare(substream); 862 if (substream->timer) 863 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART, 864 &runtime->trigger_tstamp); 865 } 866 867 static struct action_ops snd_pcm_action_start = { 868 .pre_action = snd_pcm_pre_start, 869 .do_action = snd_pcm_do_start, 870 .undo_action = snd_pcm_undo_start, 871 .post_action = snd_pcm_post_start 872 }; 873 874 /** 875 * snd_pcm_start 876 * @substream: the PCM substream instance 877 * 878 * Start all linked streams. 879 */ 880 int snd_pcm_start(struct snd_pcm_substream *substream) 881 { 882 return snd_pcm_action(&snd_pcm_action_start, substream, 883 SNDRV_PCM_STATE_RUNNING); 884 } 885 886 /* 887 * stop callbacks 888 */ 889 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state) 890 { 891 struct snd_pcm_runtime *runtime = substream->runtime; 892 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 893 return -EBADFD; 894 runtime->trigger_master = substream; 895 return 0; 896 } 897 898 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state) 899 { 900 if (substream->runtime->trigger_master == substream && 901 snd_pcm_running(substream)) 902 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); 903 return 0; /* unconditonally stop all substreams */ 904 } 905 906 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state) 907 { 908 struct snd_pcm_runtime *runtime = substream->runtime; 909 if (runtime->status->state != state) { 910 snd_pcm_trigger_tstamp(substream); 911 if (substream->timer) 912 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP, 913 &runtime->trigger_tstamp); 914 runtime->status->state = state; 915 snd_pcm_tick_set(substream, 0); 916 } 917 wake_up(&runtime->sleep); 918 } 919 920 static struct action_ops snd_pcm_action_stop = { 921 .pre_action = snd_pcm_pre_stop, 922 .do_action = snd_pcm_do_stop, 923 .post_action = snd_pcm_post_stop 924 }; 925 926 /** 927 * snd_pcm_stop 928 * @substream: the PCM substream instance 929 * @state: PCM state after stopping the stream 930 * 931 * Try to stop all running streams in the substream group. 932 * The state of each stream is changed to the given value after that unconditionally. 933 */ 934 int snd_pcm_stop(struct snd_pcm_substream *substream, int state) 935 { 936 return snd_pcm_action(&snd_pcm_action_stop, substream, state); 937 } 938 939 /** 940 * snd_pcm_drain_done 941 * @substream: the PCM substream 942 * 943 * Stop the DMA only when the given stream is playback. 944 * The state is changed to SETUP. 945 * Unlike snd_pcm_stop(), this affects only the given stream. 946 */ 947 int snd_pcm_drain_done(struct snd_pcm_substream *substream) 948 { 949 return snd_pcm_action_single(&snd_pcm_action_stop, substream, 950 SNDRV_PCM_STATE_SETUP); 951 } 952 953 /* 954 * pause callbacks 955 */ 956 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push) 957 { 958 struct snd_pcm_runtime *runtime = substream->runtime; 959 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE)) 960 return -ENOSYS; 961 if (push) { 962 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING) 963 return -EBADFD; 964 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED) 965 return -EBADFD; 966 runtime->trigger_master = substream; 967 return 0; 968 } 969 970 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push) 971 { 972 if (substream->runtime->trigger_master != substream) 973 return 0; 974 return substream->ops->trigger(substream, 975 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH : 976 SNDRV_PCM_TRIGGER_PAUSE_RELEASE); 977 } 978 979 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push) 980 { 981 if (substream->runtime->trigger_master == substream) 982 substream->ops->trigger(substream, 983 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE : 984 SNDRV_PCM_TRIGGER_PAUSE_PUSH); 985 } 986 987 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push) 988 { 989 struct snd_pcm_runtime *runtime = substream->runtime; 990 snd_pcm_trigger_tstamp(substream); 991 if (push) { 992 runtime->status->state = SNDRV_PCM_STATE_PAUSED; 993 if (substream->timer) 994 snd_timer_notify(substream->timer, 995 SNDRV_TIMER_EVENT_MPAUSE, 996 &runtime->trigger_tstamp); 997 snd_pcm_tick_set(substream, 0); 998 wake_up(&runtime->sleep); 999 } else { 1000 runtime->status->state = SNDRV_PCM_STATE_RUNNING; 1001 if (runtime->sleep_min) 1002 snd_pcm_tick_prepare(substream); 1003 if (substream->timer) 1004 snd_timer_notify(substream->timer, 1005 SNDRV_TIMER_EVENT_MCONTINUE, 1006 &runtime->trigger_tstamp); 1007 } 1008 } 1009 1010 static struct action_ops snd_pcm_action_pause = { 1011 .pre_action = snd_pcm_pre_pause, 1012 .do_action = snd_pcm_do_pause, 1013 .undo_action = snd_pcm_undo_pause, 1014 .post_action = snd_pcm_post_pause 1015 }; 1016 1017 /* 1018 * Push/release the pause for all linked streams. 1019 */ 1020 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push) 1021 { 1022 return snd_pcm_action(&snd_pcm_action_pause, substream, push); 1023 } 1024 1025 #ifdef CONFIG_PM 1026 /* suspend */ 1027 1028 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state) 1029 { 1030 struct snd_pcm_runtime *runtime = substream->runtime; 1031 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1032 return -EBUSY; 1033 runtime->trigger_master = substream; 1034 return 0; 1035 } 1036 1037 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state) 1038 { 1039 struct snd_pcm_runtime *runtime = substream->runtime; 1040 if (runtime->trigger_master != substream) 1041 return 0; 1042 if (! snd_pcm_running(substream)) 1043 return 0; 1044 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); 1045 return 0; /* suspend unconditionally */ 1046 } 1047 1048 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state) 1049 { 1050 struct snd_pcm_runtime *runtime = substream->runtime; 1051 snd_pcm_trigger_tstamp(substream); 1052 if (substream->timer) 1053 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND, 1054 &runtime->trigger_tstamp); 1055 runtime->status->suspended_state = runtime->status->state; 1056 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED; 1057 snd_pcm_tick_set(substream, 0); 1058 wake_up(&runtime->sleep); 1059 } 1060 1061 static struct action_ops snd_pcm_action_suspend = { 1062 .pre_action = snd_pcm_pre_suspend, 1063 .do_action = snd_pcm_do_suspend, 1064 .post_action = snd_pcm_post_suspend 1065 }; 1066 1067 /** 1068 * snd_pcm_suspend 1069 * @substream: the PCM substream 1070 * 1071 * Trigger SUSPEND to all linked streams. 1072 * After this call, all streams are changed to SUSPENDED state. 1073 */ 1074 int snd_pcm_suspend(struct snd_pcm_substream *substream) 1075 { 1076 int err; 1077 unsigned long flags; 1078 1079 if (! substream) 1080 return 0; 1081 1082 snd_pcm_stream_lock_irqsave(substream, flags); 1083 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0); 1084 snd_pcm_stream_unlock_irqrestore(substream, flags); 1085 return err; 1086 } 1087 1088 /** 1089 * snd_pcm_suspend_all 1090 * @pcm: the PCM instance 1091 * 1092 * Trigger SUSPEND to all substreams in the given pcm. 1093 * After this call, all streams are changed to SUSPENDED state. 1094 */ 1095 int snd_pcm_suspend_all(struct snd_pcm *pcm) 1096 { 1097 struct snd_pcm_substream *substream; 1098 int stream, err = 0; 1099 1100 if (! pcm) 1101 return 0; 1102 1103 for (stream = 0; stream < 2; stream++) { 1104 for (substream = pcm->streams[stream].substream; 1105 substream; substream = substream->next) { 1106 /* FIXME: the open/close code should lock this as well */ 1107 if (substream->runtime == NULL) 1108 continue; 1109 err = snd_pcm_suspend(substream); 1110 if (err < 0 && err != -EBUSY) 1111 return err; 1112 } 1113 } 1114 return 0; 1115 } 1116 1117 /* resume */ 1118 1119 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state) 1120 { 1121 struct snd_pcm_runtime *runtime = substream->runtime; 1122 if (!(runtime->info & SNDRV_PCM_INFO_RESUME)) 1123 return -ENOSYS; 1124 runtime->trigger_master = substream; 1125 return 0; 1126 } 1127 1128 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state) 1129 { 1130 struct snd_pcm_runtime *runtime = substream->runtime; 1131 if (runtime->trigger_master != substream) 1132 return 0; 1133 /* DMA not running previously? */ 1134 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING && 1135 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING || 1136 substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) 1137 return 0; 1138 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME); 1139 } 1140 1141 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state) 1142 { 1143 if (substream->runtime->trigger_master == substream && 1144 snd_pcm_running(substream)) 1145 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); 1146 } 1147 1148 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state) 1149 { 1150 struct snd_pcm_runtime *runtime = substream->runtime; 1151 snd_pcm_trigger_tstamp(substream); 1152 if (substream->timer) 1153 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME, 1154 &runtime->trigger_tstamp); 1155 runtime->status->state = runtime->status->suspended_state; 1156 if (runtime->sleep_min) 1157 snd_pcm_tick_prepare(substream); 1158 } 1159 1160 static struct action_ops snd_pcm_action_resume = { 1161 .pre_action = snd_pcm_pre_resume, 1162 .do_action = snd_pcm_do_resume, 1163 .undo_action = snd_pcm_undo_resume, 1164 .post_action = snd_pcm_post_resume 1165 }; 1166 1167 static int snd_pcm_resume(struct snd_pcm_substream *substream) 1168 { 1169 struct snd_card *card = substream->pcm->card; 1170 int res; 1171 1172 snd_power_lock(card); 1173 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) 1174 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0); 1175 snd_power_unlock(card); 1176 return res; 1177 } 1178 1179 #else 1180 1181 static int snd_pcm_resume(struct snd_pcm_substream *substream) 1182 { 1183 return -ENOSYS; 1184 } 1185 1186 #endif /* CONFIG_PM */ 1187 1188 /* 1189 * xrun ioctl 1190 * 1191 * Change the RUNNING stream(s) to XRUN state. 1192 */ 1193 static int snd_pcm_xrun(struct snd_pcm_substream *substream) 1194 { 1195 struct snd_card *card = substream->pcm->card; 1196 struct snd_pcm_runtime *runtime = substream->runtime; 1197 int result; 1198 1199 snd_power_lock(card); 1200 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1201 result = snd_power_wait(card, SNDRV_CTL_POWER_D0); 1202 if (result < 0) 1203 goto _unlock; 1204 } 1205 1206 snd_pcm_stream_lock_irq(substream); 1207 switch (runtime->status->state) { 1208 case SNDRV_PCM_STATE_XRUN: 1209 result = 0; /* already there */ 1210 break; 1211 case SNDRV_PCM_STATE_RUNNING: 1212 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); 1213 break; 1214 default: 1215 result = -EBADFD; 1216 } 1217 snd_pcm_stream_unlock_irq(substream); 1218 _unlock: 1219 snd_power_unlock(card); 1220 return result; 1221 } 1222 1223 /* 1224 * reset ioctl 1225 */ 1226 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state) 1227 { 1228 struct snd_pcm_runtime *runtime = substream->runtime; 1229 switch (runtime->status->state) { 1230 case SNDRV_PCM_STATE_RUNNING: 1231 case SNDRV_PCM_STATE_PREPARED: 1232 case SNDRV_PCM_STATE_PAUSED: 1233 case SNDRV_PCM_STATE_SUSPENDED: 1234 return 0; 1235 default: 1236 return -EBADFD; 1237 } 1238 } 1239 1240 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state) 1241 { 1242 struct snd_pcm_runtime *runtime = substream->runtime; 1243 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL); 1244 if (err < 0) 1245 return err; 1246 // snd_assert(runtime->status->hw_ptr < runtime->buffer_size, ); 1247 runtime->hw_ptr_base = 0; 1248 runtime->hw_ptr_interrupt = runtime->status->hw_ptr - 1249 runtime->status->hw_ptr % runtime->period_size; 1250 runtime->silence_start = runtime->status->hw_ptr; 1251 runtime->silence_filled = 0; 1252 return 0; 1253 } 1254 1255 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state) 1256 { 1257 struct snd_pcm_runtime *runtime = substream->runtime; 1258 runtime->control->appl_ptr = runtime->status->hw_ptr; 1259 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 1260 runtime->silence_size > 0) 1261 snd_pcm_playback_silence(substream, ULONG_MAX); 1262 } 1263 1264 static struct action_ops snd_pcm_action_reset = { 1265 .pre_action = snd_pcm_pre_reset, 1266 .do_action = snd_pcm_do_reset, 1267 .post_action = snd_pcm_post_reset 1268 }; 1269 1270 static int snd_pcm_reset(struct snd_pcm_substream *substream) 1271 { 1272 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0); 1273 } 1274 1275 /* 1276 * prepare ioctl 1277 */ 1278 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream, int state) 1279 { 1280 struct snd_pcm_runtime *runtime = substream->runtime; 1281 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 1282 return -EBADFD; 1283 if (snd_pcm_running(substream)) 1284 return -EBUSY; 1285 return 0; 1286 } 1287 1288 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state) 1289 { 1290 int err; 1291 err = substream->ops->prepare(substream); 1292 if (err < 0) 1293 return err; 1294 return snd_pcm_do_reset(substream, 0); 1295 } 1296 1297 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state) 1298 { 1299 struct snd_pcm_runtime *runtime = substream->runtime; 1300 runtime->control->appl_ptr = runtime->status->hw_ptr; 1301 runtime->status->state = SNDRV_PCM_STATE_PREPARED; 1302 } 1303 1304 static struct action_ops snd_pcm_action_prepare = { 1305 .pre_action = snd_pcm_pre_prepare, 1306 .do_action = snd_pcm_do_prepare, 1307 .post_action = snd_pcm_post_prepare 1308 }; 1309 1310 /** 1311 * snd_pcm_prepare 1312 * @substream: the PCM substream instance 1313 * 1314 * Prepare the PCM substream to be triggerable. 1315 */ 1316 static int snd_pcm_prepare(struct snd_pcm_substream *substream) 1317 { 1318 int res; 1319 struct snd_card *card = substream->pcm->card; 1320 1321 snd_power_lock(card); 1322 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) 1323 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare, substream, 0); 1324 snd_power_unlock(card); 1325 return res; 1326 } 1327 1328 /* 1329 * drain ioctl 1330 */ 1331 1332 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state) 1333 { 1334 if (substream->ffile->f_flags & O_NONBLOCK) 1335 return -EAGAIN; 1336 substream->runtime->trigger_master = substream; 1337 return 0; 1338 } 1339 1340 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state) 1341 { 1342 struct snd_pcm_runtime *runtime = substream->runtime; 1343 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 1344 switch (runtime->status->state) { 1345 case SNDRV_PCM_STATE_PREPARED: 1346 /* start playback stream if possible */ 1347 if (! snd_pcm_playback_empty(substream)) { 1348 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING); 1349 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING); 1350 } 1351 break; 1352 case SNDRV_PCM_STATE_RUNNING: 1353 runtime->status->state = SNDRV_PCM_STATE_DRAINING; 1354 break; 1355 default: 1356 break; 1357 } 1358 } else { 1359 /* stop running stream */ 1360 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) { 1361 int state = snd_pcm_capture_avail(runtime) > 0 ? 1362 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP; 1363 snd_pcm_do_stop(substream, state); 1364 snd_pcm_post_stop(substream, state); 1365 } 1366 } 1367 return 0; 1368 } 1369 1370 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state) 1371 { 1372 } 1373 1374 static struct action_ops snd_pcm_action_drain_init = { 1375 .pre_action = snd_pcm_pre_drain_init, 1376 .do_action = snd_pcm_do_drain_init, 1377 .post_action = snd_pcm_post_drain_init 1378 }; 1379 1380 struct drain_rec { 1381 struct snd_pcm_substream *substream; 1382 wait_queue_t wait; 1383 snd_pcm_uframes_t stop_threshold; 1384 }; 1385 1386 static int snd_pcm_drop(struct snd_pcm_substream *substream); 1387 1388 /* 1389 * Drain the stream(s). 1390 * When the substream is linked, sync until the draining of all playback streams 1391 * is finished. 1392 * After this call, all streams are supposed to be either SETUP or DRAINING 1393 * (capture only) state. 1394 */ 1395 static int snd_pcm_drain(struct snd_pcm_substream *substream) 1396 { 1397 struct snd_card *card; 1398 struct snd_pcm_runtime *runtime; 1399 struct list_head *pos; 1400 int result = 0; 1401 int i, num_drecs; 1402 struct drain_rec *drec, drec_tmp, *d; 1403 1404 snd_assert(substream != NULL, return -ENXIO); 1405 card = substream->pcm->card; 1406 runtime = substream->runtime; 1407 1408 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 1409 return -EBADFD; 1410 1411 snd_power_lock(card); 1412 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1413 result = snd_power_wait(card, SNDRV_CTL_POWER_D0); 1414 if (result < 0) { 1415 snd_power_unlock(card); 1416 return result; 1417 } 1418 } 1419 1420 /* allocate temporary record for drain sync */ 1421 down_read(&snd_pcm_link_rwsem); 1422 if (snd_pcm_stream_linked(substream)) { 1423 drec = kmalloc(substream->group->count * sizeof(*drec), GFP_KERNEL); 1424 if (! drec) { 1425 up_read(&snd_pcm_link_rwsem); 1426 snd_power_unlock(card); 1427 return -ENOMEM; 1428 } 1429 } else 1430 drec = &drec_tmp; 1431 1432 /* count only playback streams */ 1433 num_drecs = 0; 1434 snd_pcm_group_for_each(pos, substream) { 1435 struct snd_pcm_substream *s = snd_pcm_group_substream_entry(pos); 1436 runtime = s->runtime; 1437 if (s->stream == SNDRV_PCM_STREAM_PLAYBACK) { 1438 d = &drec[num_drecs++]; 1439 d->substream = s; 1440 init_waitqueue_entry(&d->wait, current); 1441 add_wait_queue(&runtime->sleep, &d->wait); 1442 /* stop_threshold fixup to avoid endless loop when 1443 * stop_threshold > buffer_size 1444 */ 1445 d->stop_threshold = runtime->stop_threshold; 1446 if (runtime->stop_threshold > runtime->buffer_size) 1447 runtime->stop_threshold = runtime->buffer_size; 1448 } 1449 } 1450 up_read(&snd_pcm_link_rwsem); 1451 if (! num_drecs) 1452 goto _error; 1453 1454 snd_pcm_stream_lock_irq(substream); 1455 /* resume pause */ 1456 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) 1457 snd_pcm_pause(substream, 0); 1458 1459 /* pre-start/stop - all running streams are changed to DRAINING state */ 1460 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0); 1461 if (result < 0) { 1462 snd_pcm_stream_unlock_irq(substream); 1463 goto _error; 1464 } 1465 1466 for (;;) { 1467 long tout; 1468 if (signal_pending(current)) { 1469 result = -ERESTARTSYS; 1470 break; 1471 } 1472 /* all finished? */ 1473 for (i = 0; i < num_drecs; i++) { 1474 runtime = drec[i].substream->runtime; 1475 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) 1476 break; 1477 } 1478 if (i == num_drecs) 1479 break; /* yes, all drained */ 1480 1481 set_current_state(TASK_INTERRUPTIBLE); 1482 snd_pcm_stream_unlock_irq(substream); 1483 snd_power_unlock(card); 1484 tout = schedule_timeout(10 * HZ); 1485 snd_power_lock(card); 1486 snd_pcm_stream_lock_irq(substream); 1487 if (tout == 0) { 1488 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1489 result = -ESTRPIPE; 1490 else { 1491 snd_printd("playback drain error (DMA or IRQ trouble?)\n"); 1492 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1493 result = -EIO; 1494 } 1495 break; 1496 } 1497 } 1498 1499 snd_pcm_stream_unlock_irq(substream); 1500 1501 _error: 1502 for (i = 0; i < num_drecs; i++) { 1503 d = &drec[i]; 1504 runtime = d->substream->runtime; 1505 remove_wait_queue(&runtime->sleep, &d->wait); 1506 runtime->stop_threshold = d->stop_threshold; 1507 } 1508 1509 if (drec != &drec_tmp) 1510 kfree(drec); 1511 snd_power_unlock(card); 1512 1513 return result; 1514 } 1515 1516 /* 1517 * drop ioctl 1518 * 1519 * Immediately put all linked substreams into SETUP state. 1520 */ 1521 static int snd_pcm_drop(struct snd_pcm_substream *substream) 1522 { 1523 struct snd_pcm_runtime *runtime; 1524 struct snd_card *card; 1525 int result = 0; 1526 1527 snd_assert(substream != NULL, return -ENXIO); 1528 runtime = substream->runtime; 1529 card = substream->pcm->card; 1530 1531 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 1532 return -EBADFD; 1533 1534 snd_power_lock(card); 1535 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1536 result = snd_power_wait(card, SNDRV_CTL_POWER_D0); 1537 if (result < 0) 1538 goto _unlock; 1539 } 1540 1541 snd_pcm_stream_lock_irq(substream); 1542 /* resume pause */ 1543 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) 1544 snd_pcm_pause(substream, 0); 1545 1546 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1547 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */ 1548 snd_pcm_stream_unlock_irq(substream); 1549 _unlock: 1550 snd_power_unlock(card); 1551 return result; 1552 } 1553 1554 1555 /* WARNING: Don't forget to fput back the file */ 1556 static struct file *snd_pcm_file_fd(int fd) 1557 { 1558 struct file *file; 1559 struct inode *inode; 1560 unsigned int minor; 1561 1562 file = fget(fd); 1563 if (!file) 1564 return NULL; 1565 inode = file->f_dentry->d_inode; 1566 if (!S_ISCHR(inode->i_mode) || 1567 imajor(inode) != snd_major) { 1568 fput(file); 1569 return NULL; 1570 } 1571 minor = iminor(inode); 1572 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) && 1573 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) { 1574 fput(file); 1575 return NULL; 1576 } 1577 return file; 1578 } 1579 1580 /* 1581 * PCM link handling 1582 */ 1583 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd) 1584 { 1585 int res = 0; 1586 struct file *file; 1587 struct snd_pcm_file *pcm_file; 1588 struct snd_pcm_substream *substream1; 1589 1590 file = snd_pcm_file_fd(fd); 1591 if (!file) 1592 return -EBADFD; 1593 pcm_file = file->private_data; 1594 substream1 = pcm_file->substream; 1595 down_write(&snd_pcm_link_rwsem); 1596 write_lock_irq(&snd_pcm_link_rwlock); 1597 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN || 1598 substream->runtime->status->state != substream1->runtime->status->state) { 1599 res = -EBADFD; 1600 goto _end; 1601 } 1602 if (snd_pcm_stream_linked(substream1)) { 1603 res = -EALREADY; 1604 goto _end; 1605 } 1606 if (!snd_pcm_stream_linked(substream)) { 1607 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC); 1608 if (substream->group == NULL) { 1609 res = -ENOMEM; 1610 goto _end; 1611 } 1612 spin_lock_init(&substream->group->lock); 1613 INIT_LIST_HEAD(&substream->group->substreams); 1614 list_add_tail(&substream->link_list, &substream->group->substreams); 1615 substream->group->count = 1; 1616 } 1617 list_add_tail(&substream1->link_list, &substream->group->substreams); 1618 substream->group->count++; 1619 substream1->group = substream->group; 1620 _end: 1621 write_unlock_irq(&snd_pcm_link_rwlock); 1622 up_write(&snd_pcm_link_rwsem); 1623 fput(file); 1624 return res; 1625 } 1626 1627 static void relink_to_local(struct snd_pcm_substream *substream) 1628 { 1629 substream->group = &substream->self_group; 1630 INIT_LIST_HEAD(&substream->self_group.substreams); 1631 list_add_tail(&substream->link_list, &substream->self_group.substreams); 1632 } 1633 1634 static int snd_pcm_unlink(struct snd_pcm_substream *substream) 1635 { 1636 struct list_head *pos; 1637 int res = 0; 1638 1639 down_write(&snd_pcm_link_rwsem); 1640 write_lock_irq(&snd_pcm_link_rwlock); 1641 if (!snd_pcm_stream_linked(substream)) { 1642 res = -EALREADY; 1643 goto _end; 1644 } 1645 list_del(&substream->link_list); 1646 substream->group->count--; 1647 if (substream->group->count == 1) { /* detach the last stream, too */ 1648 snd_pcm_group_for_each(pos, substream) { 1649 relink_to_local(snd_pcm_group_substream_entry(pos)); 1650 break; 1651 } 1652 kfree(substream->group); 1653 } 1654 relink_to_local(substream); 1655 _end: 1656 write_unlock_irq(&snd_pcm_link_rwlock); 1657 up_write(&snd_pcm_link_rwsem); 1658 return res; 1659 } 1660 1661 /* 1662 * hw configurator 1663 */ 1664 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params, 1665 struct snd_pcm_hw_rule *rule) 1666 { 1667 struct snd_interval t; 1668 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]), 1669 hw_param_interval_c(params, rule->deps[1]), &t); 1670 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1671 } 1672 1673 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params, 1674 struct snd_pcm_hw_rule *rule) 1675 { 1676 struct snd_interval t; 1677 snd_interval_div(hw_param_interval_c(params, rule->deps[0]), 1678 hw_param_interval_c(params, rule->deps[1]), &t); 1679 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1680 } 1681 1682 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params, 1683 struct snd_pcm_hw_rule *rule) 1684 { 1685 struct snd_interval t; 1686 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]), 1687 hw_param_interval_c(params, rule->deps[1]), 1688 (unsigned long) rule->private, &t); 1689 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1690 } 1691 1692 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params, 1693 struct snd_pcm_hw_rule *rule) 1694 { 1695 struct snd_interval t; 1696 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]), 1697 (unsigned long) rule->private, 1698 hw_param_interval_c(params, rule->deps[1]), &t); 1699 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1700 } 1701 1702 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params, 1703 struct snd_pcm_hw_rule *rule) 1704 { 1705 unsigned int k; 1706 struct snd_interval *i = hw_param_interval(params, rule->deps[0]); 1707 struct snd_mask m; 1708 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 1709 snd_mask_any(&m); 1710 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { 1711 int bits; 1712 if (! snd_mask_test(mask, k)) 1713 continue; 1714 bits = snd_pcm_format_physical_width(k); 1715 if (bits <= 0) 1716 continue; /* ignore invalid formats */ 1717 if ((unsigned)bits < i->min || (unsigned)bits > i->max) 1718 snd_mask_reset(&m, k); 1719 } 1720 return snd_mask_refine(mask, &m); 1721 } 1722 1723 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params, 1724 struct snd_pcm_hw_rule *rule) 1725 { 1726 struct snd_interval t; 1727 unsigned int k; 1728 t.min = UINT_MAX; 1729 t.max = 0; 1730 t.openmin = 0; 1731 t.openmax = 0; 1732 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { 1733 int bits; 1734 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k)) 1735 continue; 1736 bits = snd_pcm_format_physical_width(k); 1737 if (bits <= 0) 1738 continue; /* ignore invalid formats */ 1739 if (t.min > (unsigned)bits) 1740 t.min = bits; 1741 if (t.max < (unsigned)bits) 1742 t.max = bits; 1743 } 1744 t.integer = 1; 1745 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1746 } 1747 1748 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12 1749 #error "Change this table" 1750 #endif 1751 1752 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100, 1753 48000, 64000, 88200, 96000, 176400, 192000 }; 1754 1755 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params, 1756 struct snd_pcm_hw_rule *rule) 1757 { 1758 struct snd_pcm_hardware *hw = rule->private; 1759 return snd_interval_list(hw_param_interval(params, rule->var), 1760 ARRAY_SIZE(rates), rates, hw->rates); 1761 } 1762 1763 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params, 1764 struct snd_pcm_hw_rule *rule) 1765 { 1766 struct snd_interval t; 1767 struct snd_pcm_substream *substream = rule->private; 1768 t.min = 0; 1769 t.max = substream->buffer_bytes_max; 1770 t.openmin = 0; 1771 t.openmax = 0; 1772 t.integer = 1; 1773 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1774 } 1775 1776 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream) 1777 { 1778 struct snd_pcm_runtime *runtime = substream->runtime; 1779 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; 1780 int k, err; 1781 1782 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { 1783 snd_mask_any(constrs_mask(constrs, k)); 1784 } 1785 1786 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { 1787 snd_interval_any(constrs_interval(constrs, k)); 1788 } 1789 1790 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS)); 1791 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)); 1792 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)); 1793 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)); 1794 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS)); 1795 1796 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, 1797 snd_pcm_hw_rule_format, NULL, 1798 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1799 if (err < 0) 1800 return err; 1801 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 1802 snd_pcm_hw_rule_sample_bits, NULL, 1803 SNDRV_PCM_HW_PARAM_FORMAT, 1804 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1805 if (err < 0) 1806 return err; 1807 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 1808 snd_pcm_hw_rule_div, NULL, 1809 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); 1810 if (err < 0) 1811 return err; 1812 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1813 snd_pcm_hw_rule_mul, NULL, 1814 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); 1815 if (err < 0) 1816 return err; 1817 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1818 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1819 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 1820 if (err < 0) 1821 return err; 1822 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1823 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1824 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1); 1825 if (err < 0) 1826 return err; 1827 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 1828 snd_pcm_hw_rule_div, NULL, 1829 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1830 if (err < 0) 1831 return err; 1832 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1833 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1834 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1); 1835 if (err < 0) 1836 return err; 1837 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1838 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1839 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1); 1840 if (err < 0) 1841 return err; 1842 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, 1843 snd_pcm_hw_rule_div, NULL, 1844 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 1845 if (err < 0) 1846 return err; 1847 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1848 snd_pcm_hw_rule_div, NULL, 1849 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); 1850 if (err < 0) 1851 return err; 1852 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1853 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1854 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1855 if (err < 0) 1856 return err; 1857 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1858 snd_pcm_hw_rule_muldivk, (void*) 1000000, 1859 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); 1860 if (err < 0) 1861 return err; 1862 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1863 snd_pcm_hw_rule_mul, NULL, 1864 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); 1865 if (err < 0) 1866 return err; 1867 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1868 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1869 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1870 if (err < 0) 1871 return err; 1872 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1873 snd_pcm_hw_rule_muldivk, (void*) 1000000, 1874 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); 1875 if (err < 0) 1876 return err; 1877 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 1878 snd_pcm_hw_rule_muldivk, (void*) 8, 1879 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1880 if (err < 0) 1881 return err; 1882 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1883 snd_pcm_hw_rule_muldivk, (void*) 8, 1884 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1885 if (err < 0) 1886 return err; 1887 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 1888 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1889 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); 1890 if (err < 0) 1891 return err; 1892 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME, 1893 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1894 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); 1895 if (err < 0) 1896 return err; 1897 return 0; 1898 } 1899 1900 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream) 1901 { 1902 struct snd_pcm_runtime *runtime = substream->runtime; 1903 struct snd_pcm_hardware *hw = &runtime->hw; 1904 int err; 1905 unsigned int mask = 0; 1906 1907 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) 1908 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED; 1909 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) 1910 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED; 1911 if (hw->info & SNDRV_PCM_INFO_MMAP) { 1912 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) 1913 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; 1914 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) 1915 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED; 1916 if (hw->info & SNDRV_PCM_INFO_COMPLEX) 1917 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX; 1918 } 1919 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask); 1920 snd_assert(err >= 0, return -EINVAL); 1921 1922 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats); 1923 snd_assert(err >= 0, return -EINVAL); 1924 1925 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD); 1926 snd_assert(err >= 0, return -EINVAL); 1927 1928 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, 1929 hw->channels_min, hw->channels_max); 1930 snd_assert(err >= 0, return -EINVAL); 1931 1932 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE, 1933 hw->rate_min, hw->rate_max); 1934 snd_assert(err >= 0, return -EINVAL); 1935 1936 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 1937 hw->period_bytes_min, hw->period_bytes_max); 1938 snd_assert(err >= 0, return -EINVAL); 1939 1940 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS, 1941 hw->periods_min, hw->periods_max); 1942 snd_assert(err >= 0, return -EINVAL); 1943 1944 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1945 hw->period_bytes_min, hw->buffer_bytes_max); 1946 snd_assert(err >= 0, return -EINVAL); 1947 1948 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1949 snd_pcm_hw_rule_buffer_bytes_max, substream, 1950 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1); 1951 if (err < 0) 1952 return err; 1953 1954 /* FIXME: remove */ 1955 if (runtime->dma_bytes) { 1956 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes); 1957 snd_assert(err >= 0, return -EINVAL); 1958 } 1959 1960 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) { 1961 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1962 snd_pcm_hw_rule_rate, hw, 1963 SNDRV_PCM_HW_PARAM_RATE, -1); 1964 if (err < 0) 1965 return err; 1966 } 1967 1968 /* FIXME: this belong to lowlevel */ 1969 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_TICK_TIME, 1970 1000000 / HZ, 1000000 / HZ); 1971 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE); 1972 1973 return 0; 1974 } 1975 1976 static void snd_pcm_add_file(struct snd_pcm_str *str, 1977 struct snd_pcm_file *pcm_file) 1978 { 1979 pcm_file->next = str->files; 1980 str->files = pcm_file; 1981 } 1982 1983 static void snd_pcm_remove_file(struct snd_pcm_str *str, 1984 struct snd_pcm_file *pcm_file) 1985 { 1986 struct snd_pcm_file * pcm_file1; 1987 if (str->files == pcm_file) { 1988 str->files = pcm_file->next; 1989 } else { 1990 pcm_file1 = str->files; 1991 while (pcm_file1 && pcm_file1->next != pcm_file) 1992 pcm_file1 = pcm_file1->next; 1993 if (pcm_file1 != NULL) 1994 pcm_file1->next = pcm_file->next; 1995 } 1996 } 1997 1998 static void pcm_release_private(struct snd_pcm_substream *substream) 1999 { 2000 struct snd_pcm_file *pcm_file = substream->file; 2001 2002 snd_pcm_unlink(substream); 2003 snd_pcm_remove_file(substream->pstr, pcm_file); 2004 kfree(pcm_file); 2005 } 2006 2007 void snd_pcm_release_substream(struct snd_pcm_substream *substream) 2008 { 2009 snd_pcm_drop(substream); 2010 if (substream->pcm_release) 2011 substream->pcm_release(substream); 2012 if (substream->hw_opened) { 2013 if (substream->ops->hw_free != NULL) 2014 substream->ops->hw_free(substream); 2015 substream->ops->close(substream); 2016 substream->hw_opened = 0; 2017 } 2018 snd_pcm_detach_substream(substream); 2019 } 2020 2021 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, 2022 struct file *file, 2023 struct snd_pcm_substream **rsubstream) 2024 { 2025 struct snd_pcm_substream *substream; 2026 int err; 2027 2028 err = snd_pcm_attach_substream(pcm, stream, file, &substream); 2029 if (err < 0) 2030 return err; 2031 substream->no_mmap_ctrl = 0; 2032 err = snd_pcm_hw_constraints_init(substream); 2033 if (err < 0) { 2034 snd_printd("snd_pcm_hw_constraints_init failed\n"); 2035 goto error; 2036 } 2037 2038 if ((err = substream->ops->open(substream)) < 0) 2039 goto error; 2040 2041 substream->hw_opened = 1; 2042 2043 err = snd_pcm_hw_constraints_complete(substream); 2044 if (err < 0) { 2045 snd_printd("snd_pcm_hw_constraints_complete failed\n"); 2046 goto error; 2047 } 2048 2049 *rsubstream = substream; 2050 return 0; 2051 2052 error: 2053 snd_pcm_release_substream(substream); 2054 return err; 2055 } 2056 2057 static int snd_pcm_open_file(struct file *file, 2058 struct snd_pcm *pcm, 2059 int stream, 2060 struct snd_pcm_file **rpcm_file) 2061 { 2062 struct snd_pcm_file *pcm_file; 2063 struct snd_pcm_substream *substream; 2064 struct snd_pcm_str *str; 2065 int err; 2066 2067 snd_assert(rpcm_file != NULL, return -EINVAL); 2068 *rpcm_file = NULL; 2069 2070 err = snd_pcm_open_substream(pcm, stream, file, &substream); 2071 if (err < 0) 2072 return err; 2073 2074 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL); 2075 if (pcm_file == NULL) { 2076 snd_pcm_release_substream(substream); 2077 return -ENOMEM; 2078 } 2079 str = substream->pstr; 2080 substream->file = pcm_file; 2081 substream->pcm_release = pcm_release_private; 2082 pcm_file->substream = substream; 2083 snd_pcm_add_file(str, pcm_file); 2084 2085 file->private_data = pcm_file; 2086 *rpcm_file = pcm_file; 2087 return 0; 2088 } 2089 2090 static int snd_pcm_playback_open(struct inode *inode, struct file *file) 2091 { 2092 struct snd_pcm *pcm; 2093 2094 pcm = snd_lookup_minor_data(iminor(inode), 2095 SNDRV_DEVICE_TYPE_PCM_PLAYBACK); 2096 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK); 2097 } 2098 2099 static int snd_pcm_capture_open(struct inode *inode, struct file *file) 2100 { 2101 struct snd_pcm *pcm; 2102 2103 pcm = snd_lookup_minor_data(iminor(inode), 2104 SNDRV_DEVICE_TYPE_PCM_CAPTURE); 2105 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE); 2106 } 2107 2108 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream) 2109 { 2110 int err; 2111 struct snd_pcm_file *pcm_file; 2112 wait_queue_t wait; 2113 2114 if (pcm == NULL) { 2115 err = -ENODEV; 2116 goto __error1; 2117 } 2118 err = snd_card_file_add(pcm->card, file); 2119 if (err < 0) 2120 goto __error1; 2121 if (!try_module_get(pcm->card->module)) { 2122 err = -EFAULT; 2123 goto __error2; 2124 } 2125 init_waitqueue_entry(&wait, current); 2126 add_wait_queue(&pcm->open_wait, &wait); 2127 mutex_lock(&pcm->open_mutex); 2128 while (1) { 2129 err = snd_pcm_open_file(file, pcm, stream, &pcm_file); 2130 if (err >= 0) 2131 break; 2132 if (err == -EAGAIN) { 2133 if (file->f_flags & O_NONBLOCK) { 2134 err = -EBUSY; 2135 break; 2136 } 2137 } else 2138 break; 2139 set_current_state(TASK_INTERRUPTIBLE); 2140 mutex_unlock(&pcm->open_mutex); 2141 schedule(); 2142 mutex_lock(&pcm->open_mutex); 2143 if (signal_pending(current)) { 2144 err = -ERESTARTSYS; 2145 break; 2146 } 2147 } 2148 remove_wait_queue(&pcm->open_wait, &wait); 2149 mutex_unlock(&pcm->open_mutex); 2150 if (err < 0) 2151 goto __error; 2152 return err; 2153 2154 __error: 2155 module_put(pcm->card->module); 2156 __error2: 2157 snd_card_file_remove(pcm->card, file); 2158 __error1: 2159 return err; 2160 } 2161 2162 static int snd_pcm_release(struct inode *inode, struct file *file) 2163 { 2164 struct snd_pcm *pcm; 2165 struct snd_pcm_substream *substream; 2166 struct snd_pcm_file *pcm_file; 2167 2168 pcm_file = file->private_data; 2169 substream = pcm_file->substream; 2170 snd_assert(substream != NULL, return -ENXIO); 2171 snd_assert(!atomic_read(&substream->runtime->mmap_count), ); 2172 pcm = substream->pcm; 2173 fasync_helper(-1, file, 0, &substream->runtime->fasync); 2174 mutex_lock(&pcm->open_mutex); 2175 snd_pcm_release_substream(substream); 2176 mutex_unlock(&pcm->open_mutex); 2177 wake_up(&pcm->open_wait); 2178 module_put(pcm->card->module); 2179 snd_card_file_remove(pcm->card, file); 2180 return 0; 2181 } 2182 2183 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream, 2184 snd_pcm_uframes_t frames) 2185 { 2186 struct snd_pcm_runtime *runtime = substream->runtime; 2187 snd_pcm_sframes_t appl_ptr; 2188 snd_pcm_sframes_t ret; 2189 snd_pcm_sframes_t hw_avail; 2190 2191 if (frames == 0) 2192 return 0; 2193 2194 snd_pcm_stream_lock_irq(substream); 2195 switch (runtime->status->state) { 2196 case SNDRV_PCM_STATE_PREPARED: 2197 break; 2198 case SNDRV_PCM_STATE_DRAINING: 2199 case SNDRV_PCM_STATE_RUNNING: 2200 if (snd_pcm_update_hw_ptr(substream) >= 0) 2201 break; 2202 /* Fall through */ 2203 case SNDRV_PCM_STATE_XRUN: 2204 ret = -EPIPE; 2205 goto __end; 2206 default: 2207 ret = -EBADFD; 2208 goto __end; 2209 } 2210 2211 hw_avail = snd_pcm_playback_hw_avail(runtime); 2212 if (hw_avail <= 0) { 2213 ret = 0; 2214 goto __end; 2215 } 2216 if (frames > (snd_pcm_uframes_t)hw_avail) 2217 frames = hw_avail; 2218 else 2219 frames -= frames % runtime->xfer_align; 2220 appl_ptr = runtime->control->appl_ptr - frames; 2221 if (appl_ptr < 0) 2222 appl_ptr += runtime->boundary; 2223 runtime->control->appl_ptr = appl_ptr; 2224 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING && 2225 runtime->sleep_min) 2226 snd_pcm_tick_prepare(substream); 2227 ret = frames; 2228 __end: 2229 snd_pcm_stream_unlock_irq(substream); 2230 return ret; 2231 } 2232 2233 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream, 2234 snd_pcm_uframes_t frames) 2235 { 2236 struct snd_pcm_runtime *runtime = substream->runtime; 2237 snd_pcm_sframes_t appl_ptr; 2238 snd_pcm_sframes_t ret; 2239 snd_pcm_sframes_t hw_avail; 2240 2241 if (frames == 0) 2242 return 0; 2243 2244 snd_pcm_stream_lock_irq(substream); 2245 switch (runtime->status->state) { 2246 case SNDRV_PCM_STATE_PREPARED: 2247 case SNDRV_PCM_STATE_DRAINING: 2248 break; 2249 case SNDRV_PCM_STATE_RUNNING: 2250 if (snd_pcm_update_hw_ptr(substream) >= 0) 2251 break; 2252 /* Fall through */ 2253 case SNDRV_PCM_STATE_XRUN: 2254 ret = -EPIPE; 2255 goto __end; 2256 default: 2257 ret = -EBADFD; 2258 goto __end; 2259 } 2260 2261 hw_avail = snd_pcm_capture_hw_avail(runtime); 2262 if (hw_avail <= 0) { 2263 ret = 0; 2264 goto __end; 2265 } 2266 if (frames > (snd_pcm_uframes_t)hw_avail) 2267 frames = hw_avail; 2268 else 2269 frames -= frames % runtime->xfer_align; 2270 appl_ptr = runtime->control->appl_ptr - frames; 2271 if (appl_ptr < 0) 2272 appl_ptr += runtime->boundary; 2273 runtime->control->appl_ptr = appl_ptr; 2274 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING && 2275 runtime->sleep_min) 2276 snd_pcm_tick_prepare(substream); 2277 ret = frames; 2278 __end: 2279 snd_pcm_stream_unlock_irq(substream); 2280 return ret; 2281 } 2282 2283 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream, 2284 snd_pcm_uframes_t frames) 2285 { 2286 struct snd_pcm_runtime *runtime = substream->runtime; 2287 snd_pcm_sframes_t appl_ptr; 2288 snd_pcm_sframes_t ret; 2289 snd_pcm_sframes_t avail; 2290 2291 if (frames == 0) 2292 return 0; 2293 2294 snd_pcm_stream_lock_irq(substream); 2295 switch (runtime->status->state) { 2296 case SNDRV_PCM_STATE_PREPARED: 2297 case SNDRV_PCM_STATE_PAUSED: 2298 break; 2299 case SNDRV_PCM_STATE_DRAINING: 2300 case SNDRV_PCM_STATE_RUNNING: 2301 if (snd_pcm_update_hw_ptr(substream) >= 0) 2302 break; 2303 /* Fall through */ 2304 case SNDRV_PCM_STATE_XRUN: 2305 ret = -EPIPE; 2306 goto __end; 2307 default: 2308 ret = -EBADFD; 2309 goto __end; 2310 } 2311 2312 avail = snd_pcm_playback_avail(runtime); 2313 if (avail <= 0) { 2314 ret = 0; 2315 goto __end; 2316 } 2317 if (frames > (snd_pcm_uframes_t)avail) 2318 frames = avail; 2319 else 2320 frames -= frames % runtime->xfer_align; 2321 appl_ptr = runtime->control->appl_ptr + frames; 2322 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) 2323 appl_ptr -= runtime->boundary; 2324 runtime->control->appl_ptr = appl_ptr; 2325 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING && 2326 runtime->sleep_min) 2327 snd_pcm_tick_prepare(substream); 2328 ret = frames; 2329 __end: 2330 snd_pcm_stream_unlock_irq(substream); 2331 return ret; 2332 } 2333 2334 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream, 2335 snd_pcm_uframes_t frames) 2336 { 2337 struct snd_pcm_runtime *runtime = substream->runtime; 2338 snd_pcm_sframes_t appl_ptr; 2339 snd_pcm_sframes_t ret; 2340 snd_pcm_sframes_t avail; 2341 2342 if (frames == 0) 2343 return 0; 2344 2345 snd_pcm_stream_lock_irq(substream); 2346 switch (runtime->status->state) { 2347 case SNDRV_PCM_STATE_PREPARED: 2348 case SNDRV_PCM_STATE_DRAINING: 2349 case SNDRV_PCM_STATE_PAUSED: 2350 break; 2351 case SNDRV_PCM_STATE_RUNNING: 2352 if (snd_pcm_update_hw_ptr(substream) >= 0) 2353 break; 2354 /* Fall through */ 2355 case SNDRV_PCM_STATE_XRUN: 2356 ret = -EPIPE; 2357 goto __end; 2358 default: 2359 ret = -EBADFD; 2360 goto __end; 2361 } 2362 2363 avail = snd_pcm_capture_avail(runtime); 2364 if (avail <= 0) { 2365 ret = 0; 2366 goto __end; 2367 } 2368 if (frames > (snd_pcm_uframes_t)avail) 2369 frames = avail; 2370 else 2371 frames -= frames % runtime->xfer_align; 2372 appl_ptr = runtime->control->appl_ptr + frames; 2373 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) 2374 appl_ptr -= runtime->boundary; 2375 runtime->control->appl_ptr = appl_ptr; 2376 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING && 2377 runtime->sleep_min) 2378 snd_pcm_tick_prepare(substream); 2379 ret = frames; 2380 __end: 2381 snd_pcm_stream_unlock_irq(substream); 2382 return ret; 2383 } 2384 2385 static int snd_pcm_hwsync(struct snd_pcm_substream *substream) 2386 { 2387 struct snd_pcm_runtime *runtime = substream->runtime; 2388 int err; 2389 2390 snd_pcm_stream_lock_irq(substream); 2391 switch (runtime->status->state) { 2392 case SNDRV_PCM_STATE_DRAINING: 2393 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 2394 goto __badfd; 2395 case SNDRV_PCM_STATE_RUNNING: 2396 if ((err = snd_pcm_update_hw_ptr(substream)) < 0) 2397 break; 2398 /* Fall through */ 2399 case SNDRV_PCM_STATE_PREPARED: 2400 case SNDRV_PCM_STATE_SUSPENDED: 2401 err = 0; 2402 break; 2403 case SNDRV_PCM_STATE_XRUN: 2404 err = -EPIPE; 2405 break; 2406 default: 2407 __badfd: 2408 err = -EBADFD; 2409 break; 2410 } 2411 snd_pcm_stream_unlock_irq(substream); 2412 return err; 2413 } 2414 2415 static int snd_pcm_delay(struct snd_pcm_substream *substream, 2416 snd_pcm_sframes_t __user *res) 2417 { 2418 struct snd_pcm_runtime *runtime = substream->runtime; 2419 int err; 2420 snd_pcm_sframes_t n = 0; 2421 2422 snd_pcm_stream_lock_irq(substream); 2423 switch (runtime->status->state) { 2424 case SNDRV_PCM_STATE_DRAINING: 2425 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 2426 goto __badfd; 2427 case SNDRV_PCM_STATE_RUNNING: 2428 if ((err = snd_pcm_update_hw_ptr(substream)) < 0) 2429 break; 2430 /* Fall through */ 2431 case SNDRV_PCM_STATE_PREPARED: 2432 case SNDRV_PCM_STATE_SUSPENDED: 2433 err = 0; 2434 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2435 n = snd_pcm_playback_hw_avail(runtime); 2436 else 2437 n = snd_pcm_capture_avail(runtime); 2438 break; 2439 case SNDRV_PCM_STATE_XRUN: 2440 err = -EPIPE; 2441 break; 2442 default: 2443 __badfd: 2444 err = -EBADFD; 2445 break; 2446 } 2447 snd_pcm_stream_unlock_irq(substream); 2448 if (!err) 2449 if (put_user(n, res)) 2450 err = -EFAULT; 2451 return err; 2452 } 2453 2454 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream, 2455 struct snd_pcm_sync_ptr __user *_sync_ptr) 2456 { 2457 struct snd_pcm_runtime *runtime = substream->runtime; 2458 struct snd_pcm_sync_ptr sync_ptr; 2459 volatile struct snd_pcm_mmap_status *status; 2460 volatile struct snd_pcm_mmap_control *control; 2461 int err; 2462 2463 memset(&sync_ptr, 0, sizeof(sync_ptr)); 2464 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags))) 2465 return -EFAULT; 2466 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control))) 2467 return -EFAULT; 2468 status = runtime->status; 2469 control = runtime->control; 2470 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) { 2471 err = snd_pcm_hwsync(substream); 2472 if (err < 0) 2473 return err; 2474 } 2475 snd_pcm_stream_lock_irq(substream); 2476 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) 2477 control->appl_ptr = sync_ptr.c.control.appl_ptr; 2478 else 2479 sync_ptr.c.control.appl_ptr = control->appl_ptr; 2480 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) 2481 control->avail_min = sync_ptr.c.control.avail_min; 2482 else 2483 sync_ptr.c.control.avail_min = control->avail_min; 2484 sync_ptr.s.status.state = status->state; 2485 sync_ptr.s.status.hw_ptr = status->hw_ptr; 2486 sync_ptr.s.status.tstamp = status->tstamp; 2487 sync_ptr.s.status.suspended_state = status->suspended_state; 2488 snd_pcm_stream_unlock_irq(substream); 2489 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr))) 2490 return -EFAULT; 2491 return 0; 2492 } 2493 2494 static int snd_pcm_common_ioctl1(struct snd_pcm_substream *substream, 2495 unsigned int cmd, void __user *arg) 2496 { 2497 snd_assert(substream != NULL, return -ENXIO); 2498 2499 switch (cmd) { 2500 case SNDRV_PCM_IOCTL_PVERSION: 2501 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0; 2502 case SNDRV_PCM_IOCTL_INFO: 2503 return snd_pcm_info_user(substream, arg); 2504 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */ 2505 return 0; 2506 case SNDRV_PCM_IOCTL_HW_REFINE: 2507 return snd_pcm_hw_refine_user(substream, arg); 2508 case SNDRV_PCM_IOCTL_HW_PARAMS: 2509 return snd_pcm_hw_params_user(substream, arg); 2510 case SNDRV_PCM_IOCTL_HW_FREE: 2511 return snd_pcm_hw_free(substream); 2512 case SNDRV_PCM_IOCTL_SW_PARAMS: 2513 return snd_pcm_sw_params_user(substream, arg); 2514 case SNDRV_PCM_IOCTL_STATUS: 2515 return snd_pcm_status_user(substream, arg); 2516 case SNDRV_PCM_IOCTL_CHANNEL_INFO: 2517 return snd_pcm_channel_info_user(substream, arg); 2518 case SNDRV_PCM_IOCTL_PREPARE: 2519 return snd_pcm_prepare(substream); 2520 case SNDRV_PCM_IOCTL_RESET: 2521 return snd_pcm_reset(substream); 2522 case SNDRV_PCM_IOCTL_START: 2523 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING); 2524 case SNDRV_PCM_IOCTL_LINK: 2525 return snd_pcm_link(substream, (int)(unsigned long) arg); 2526 case SNDRV_PCM_IOCTL_UNLINK: 2527 return snd_pcm_unlink(substream); 2528 case SNDRV_PCM_IOCTL_RESUME: 2529 return snd_pcm_resume(substream); 2530 case SNDRV_PCM_IOCTL_XRUN: 2531 return snd_pcm_xrun(substream); 2532 case SNDRV_PCM_IOCTL_HWSYNC: 2533 return snd_pcm_hwsync(substream); 2534 case SNDRV_PCM_IOCTL_DELAY: 2535 return snd_pcm_delay(substream, arg); 2536 case SNDRV_PCM_IOCTL_SYNC_PTR: 2537 return snd_pcm_sync_ptr(substream, arg); 2538 #ifdef CONFIG_SND_SUPPORT_OLD_API 2539 case SNDRV_PCM_IOCTL_HW_REFINE_OLD: 2540 return snd_pcm_hw_refine_old_user(substream, arg); 2541 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD: 2542 return snd_pcm_hw_params_old_user(substream, arg); 2543 #endif 2544 case SNDRV_PCM_IOCTL_DRAIN: 2545 return snd_pcm_drain(substream); 2546 case SNDRV_PCM_IOCTL_DROP: 2547 return snd_pcm_drop(substream); 2548 case SNDRV_PCM_IOCTL_PAUSE: 2549 { 2550 int res; 2551 snd_pcm_stream_lock_irq(substream); 2552 res = snd_pcm_pause(substream, (int)(unsigned long)arg); 2553 snd_pcm_stream_unlock_irq(substream); 2554 return res; 2555 } 2556 } 2557 snd_printd("unknown ioctl = 0x%x\n", cmd); 2558 return -ENOTTY; 2559 } 2560 2561 static int snd_pcm_playback_ioctl1(struct snd_pcm_substream *substream, 2562 unsigned int cmd, void __user *arg) 2563 { 2564 snd_assert(substream != NULL, return -ENXIO); 2565 snd_assert(substream->stream == SNDRV_PCM_STREAM_PLAYBACK, return -EINVAL); 2566 switch (cmd) { 2567 case SNDRV_PCM_IOCTL_WRITEI_FRAMES: 2568 { 2569 struct snd_xferi xferi; 2570 struct snd_xferi __user *_xferi = arg; 2571 struct snd_pcm_runtime *runtime = substream->runtime; 2572 snd_pcm_sframes_t result; 2573 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2574 return -EBADFD; 2575 if (put_user(0, &_xferi->result)) 2576 return -EFAULT; 2577 if (copy_from_user(&xferi, _xferi, sizeof(xferi))) 2578 return -EFAULT; 2579 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames); 2580 __put_user(result, &_xferi->result); 2581 return result < 0 ? result : 0; 2582 } 2583 case SNDRV_PCM_IOCTL_WRITEN_FRAMES: 2584 { 2585 struct snd_xfern xfern; 2586 struct snd_xfern __user *_xfern = arg; 2587 struct snd_pcm_runtime *runtime = substream->runtime; 2588 void __user **bufs; 2589 snd_pcm_sframes_t result; 2590 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2591 return -EBADFD; 2592 if (runtime->channels > 128) 2593 return -EINVAL; 2594 if (put_user(0, &_xfern->result)) 2595 return -EFAULT; 2596 if (copy_from_user(&xfern, _xfern, sizeof(xfern))) 2597 return -EFAULT; 2598 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL); 2599 if (bufs == NULL) 2600 return -ENOMEM; 2601 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) { 2602 kfree(bufs); 2603 return -EFAULT; 2604 } 2605 result = snd_pcm_lib_writev(substream, bufs, xfern.frames); 2606 kfree(bufs); 2607 __put_user(result, &_xfern->result); 2608 return result < 0 ? result : 0; 2609 } 2610 case SNDRV_PCM_IOCTL_REWIND: 2611 { 2612 snd_pcm_uframes_t frames; 2613 snd_pcm_uframes_t __user *_frames = arg; 2614 snd_pcm_sframes_t result; 2615 if (get_user(frames, _frames)) 2616 return -EFAULT; 2617 if (put_user(0, _frames)) 2618 return -EFAULT; 2619 result = snd_pcm_playback_rewind(substream, frames); 2620 __put_user(result, _frames); 2621 return result < 0 ? result : 0; 2622 } 2623 case SNDRV_PCM_IOCTL_FORWARD: 2624 { 2625 snd_pcm_uframes_t frames; 2626 snd_pcm_uframes_t __user *_frames = arg; 2627 snd_pcm_sframes_t result; 2628 if (get_user(frames, _frames)) 2629 return -EFAULT; 2630 if (put_user(0, _frames)) 2631 return -EFAULT; 2632 result = snd_pcm_playback_forward(substream, frames); 2633 __put_user(result, _frames); 2634 return result < 0 ? result : 0; 2635 } 2636 } 2637 return snd_pcm_common_ioctl1(substream, cmd, arg); 2638 } 2639 2640 static int snd_pcm_capture_ioctl1(struct snd_pcm_substream *substream, 2641 unsigned int cmd, void __user *arg) 2642 { 2643 snd_assert(substream != NULL, return -ENXIO); 2644 snd_assert(substream->stream == SNDRV_PCM_STREAM_CAPTURE, return -EINVAL); 2645 switch (cmd) { 2646 case SNDRV_PCM_IOCTL_READI_FRAMES: 2647 { 2648 struct snd_xferi xferi; 2649 struct snd_xferi __user *_xferi = arg; 2650 struct snd_pcm_runtime *runtime = substream->runtime; 2651 snd_pcm_sframes_t result; 2652 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2653 return -EBADFD; 2654 if (put_user(0, &_xferi->result)) 2655 return -EFAULT; 2656 if (copy_from_user(&xferi, _xferi, sizeof(xferi))) 2657 return -EFAULT; 2658 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames); 2659 __put_user(result, &_xferi->result); 2660 return result < 0 ? result : 0; 2661 } 2662 case SNDRV_PCM_IOCTL_READN_FRAMES: 2663 { 2664 struct snd_xfern xfern; 2665 struct snd_xfern __user *_xfern = arg; 2666 struct snd_pcm_runtime *runtime = substream->runtime; 2667 void *bufs; 2668 snd_pcm_sframes_t result; 2669 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2670 return -EBADFD; 2671 if (runtime->channels > 128) 2672 return -EINVAL; 2673 if (put_user(0, &_xfern->result)) 2674 return -EFAULT; 2675 if (copy_from_user(&xfern, _xfern, sizeof(xfern))) 2676 return -EFAULT; 2677 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL); 2678 if (bufs == NULL) 2679 return -ENOMEM; 2680 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) { 2681 kfree(bufs); 2682 return -EFAULT; 2683 } 2684 result = snd_pcm_lib_readv(substream, bufs, xfern.frames); 2685 kfree(bufs); 2686 __put_user(result, &_xfern->result); 2687 return result < 0 ? result : 0; 2688 } 2689 case SNDRV_PCM_IOCTL_REWIND: 2690 { 2691 snd_pcm_uframes_t frames; 2692 snd_pcm_uframes_t __user *_frames = arg; 2693 snd_pcm_sframes_t result; 2694 if (get_user(frames, _frames)) 2695 return -EFAULT; 2696 if (put_user(0, _frames)) 2697 return -EFAULT; 2698 result = snd_pcm_capture_rewind(substream, frames); 2699 __put_user(result, _frames); 2700 return result < 0 ? result : 0; 2701 } 2702 case SNDRV_PCM_IOCTL_FORWARD: 2703 { 2704 snd_pcm_uframes_t frames; 2705 snd_pcm_uframes_t __user *_frames = arg; 2706 snd_pcm_sframes_t result; 2707 if (get_user(frames, _frames)) 2708 return -EFAULT; 2709 if (put_user(0, _frames)) 2710 return -EFAULT; 2711 result = snd_pcm_capture_forward(substream, frames); 2712 __put_user(result, _frames); 2713 return result < 0 ? result : 0; 2714 } 2715 } 2716 return snd_pcm_common_ioctl1(substream, cmd, arg); 2717 } 2718 2719 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd, 2720 unsigned long arg) 2721 { 2722 struct snd_pcm_file *pcm_file; 2723 2724 pcm_file = file->private_data; 2725 2726 if (((cmd >> 8) & 0xff) != 'A') 2727 return -ENOTTY; 2728 2729 return snd_pcm_playback_ioctl1(pcm_file->substream, cmd, (void __user *)arg); 2730 } 2731 2732 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd, 2733 unsigned long arg) 2734 { 2735 struct snd_pcm_file *pcm_file; 2736 2737 pcm_file = file->private_data; 2738 2739 if (((cmd >> 8) & 0xff) != 'A') 2740 return -ENOTTY; 2741 2742 return snd_pcm_capture_ioctl1(pcm_file->substream, cmd, (void __user *)arg); 2743 } 2744 2745 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, 2746 unsigned int cmd, void *arg) 2747 { 2748 mm_segment_t fs; 2749 int result; 2750 2751 fs = snd_enter_user(); 2752 switch (substream->stream) { 2753 case SNDRV_PCM_STREAM_PLAYBACK: 2754 result = snd_pcm_playback_ioctl1(substream, 2755 cmd, (void __user *)arg); 2756 break; 2757 case SNDRV_PCM_STREAM_CAPTURE: 2758 result = snd_pcm_capture_ioctl1(substream, 2759 cmd, (void __user *)arg); 2760 break; 2761 default: 2762 result = -EINVAL; 2763 break; 2764 } 2765 snd_leave_user(fs); 2766 return result; 2767 } 2768 2769 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count, 2770 loff_t * offset) 2771 { 2772 struct snd_pcm_file *pcm_file; 2773 struct snd_pcm_substream *substream; 2774 struct snd_pcm_runtime *runtime; 2775 snd_pcm_sframes_t result; 2776 2777 pcm_file = file->private_data; 2778 substream = pcm_file->substream; 2779 snd_assert(substream != NULL, return -ENXIO); 2780 runtime = substream->runtime; 2781 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2782 return -EBADFD; 2783 if (!frame_aligned(runtime, count)) 2784 return -EINVAL; 2785 count = bytes_to_frames(runtime, count); 2786 result = snd_pcm_lib_read(substream, buf, count); 2787 if (result > 0) 2788 result = frames_to_bytes(runtime, result); 2789 return result; 2790 } 2791 2792 static ssize_t snd_pcm_write(struct file *file, const char __user *buf, 2793 size_t count, loff_t * offset) 2794 { 2795 struct snd_pcm_file *pcm_file; 2796 struct snd_pcm_substream *substream; 2797 struct snd_pcm_runtime *runtime; 2798 snd_pcm_sframes_t result; 2799 2800 pcm_file = file->private_data; 2801 substream = pcm_file->substream; 2802 snd_assert(substream != NULL, result = -ENXIO; goto end); 2803 runtime = substream->runtime; 2804 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 2805 result = -EBADFD; 2806 goto end; 2807 } 2808 if (!frame_aligned(runtime, count)) { 2809 result = -EINVAL; 2810 goto end; 2811 } 2812 count = bytes_to_frames(runtime, count); 2813 result = snd_pcm_lib_write(substream, buf, count); 2814 if (result > 0) 2815 result = frames_to_bytes(runtime, result); 2816 end: 2817 return result; 2818 } 2819 2820 static ssize_t snd_pcm_readv(struct file *file, const struct iovec *_vector, 2821 unsigned long count, loff_t * offset) 2822 2823 { 2824 struct snd_pcm_file *pcm_file; 2825 struct snd_pcm_substream *substream; 2826 struct snd_pcm_runtime *runtime; 2827 snd_pcm_sframes_t result; 2828 unsigned long i; 2829 void __user **bufs; 2830 snd_pcm_uframes_t frames; 2831 2832 pcm_file = file->private_data; 2833 substream = pcm_file->substream; 2834 snd_assert(substream != NULL, return -ENXIO); 2835 runtime = substream->runtime; 2836 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2837 return -EBADFD; 2838 if (count > 1024 || count != runtime->channels) 2839 return -EINVAL; 2840 if (!frame_aligned(runtime, _vector->iov_len)) 2841 return -EINVAL; 2842 frames = bytes_to_samples(runtime, _vector->iov_len); 2843 bufs = kmalloc(sizeof(void *) * count, GFP_KERNEL); 2844 if (bufs == NULL) 2845 return -ENOMEM; 2846 for (i = 0; i < count; ++i) 2847 bufs[i] = _vector[i].iov_base; 2848 result = snd_pcm_lib_readv(substream, bufs, frames); 2849 if (result > 0) 2850 result = frames_to_bytes(runtime, result); 2851 kfree(bufs); 2852 return result; 2853 } 2854 2855 static ssize_t snd_pcm_writev(struct file *file, const struct iovec *_vector, 2856 unsigned long count, loff_t * offset) 2857 { 2858 struct snd_pcm_file *pcm_file; 2859 struct snd_pcm_substream *substream; 2860 struct snd_pcm_runtime *runtime; 2861 snd_pcm_sframes_t result; 2862 unsigned long i; 2863 void __user **bufs; 2864 snd_pcm_uframes_t frames; 2865 2866 pcm_file = file->private_data; 2867 substream = pcm_file->substream; 2868 snd_assert(substream != NULL, result = -ENXIO; goto end); 2869 runtime = substream->runtime; 2870 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 2871 result = -EBADFD; 2872 goto end; 2873 } 2874 if (count > 128 || count != runtime->channels || 2875 !frame_aligned(runtime, _vector->iov_len)) { 2876 result = -EINVAL; 2877 goto end; 2878 } 2879 frames = bytes_to_samples(runtime, _vector->iov_len); 2880 bufs = kmalloc(sizeof(void *) * count, GFP_KERNEL); 2881 if (bufs == NULL) 2882 return -ENOMEM; 2883 for (i = 0; i < count; ++i) 2884 bufs[i] = _vector[i].iov_base; 2885 result = snd_pcm_lib_writev(substream, bufs, frames); 2886 if (result > 0) 2887 result = frames_to_bytes(runtime, result); 2888 kfree(bufs); 2889 end: 2890 return result; 2891 } 2892 2893 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait) 2894 { 2895 struct snd_pcm_file *pcm_file; 2896 struct snd_pcm_substream *substream; 2897 struct snd_pcm_runtime *runtime; 2898 unsigned int mask; 2899 snd_pcm_uframes_t avail; 2900 2901 pcm_file = file->private_data; 2902 2903 substream = pcm_file->substream; 2904 snd_assert(substream != NULL, return -ENXIO); 2905 runtime = substream->runtime; 2906 2907 poll_wait(file, &runtime->sleep, wait); 2908 2909 snd_pcm_stream_lock_irq(substream); 2910 avail = snd_pcm_playback_avail(runtime); 2911 switch (runtime->status->state) { 2912 case SNDRV_PCM_STATE_RUNNING: 2913 case SNDRV_PCM_STATE_PREPARED: 2914 case SNDRV_PCM_STATE_PAUSED: 2915 if (avail >= runtime->control->avail_min) { 2916 mask = POLLOUT | POLLWRNORM; 2917 break; 2918 } 2919 /* Fall through */ 2920 case SNDRV_PCM_STATE_DRAINING: 2921 mask = 0; 2922 break; 2923 default: 2924 mask = POLLOUT | POLLWRNORM | POLLERR; 2925 break; 2926 } 2927 snd_pcm_stream_unlock_irq(substream); 2928 return mask; 2929 } 2930 2931 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait) 2932 { 2933 struct snd_pcm_file *pcm_file; 2934 struct snd_pcm_substream *substream; 2935 struct snd_pcm_runtime *runtime; 2936 unsigned int mask; 2937 snd_pcm_uframes_t avail; 2938 2939 pcm_file = file->private_data; 2940 2941 substream = pcm_file->substream; 2942 snd_assert(substream != NULL, return -ENXIO); 2943 runtime = substream->runtime; 2944 2945 poll_wait(file, &runtime->sleep, wait); 2946 2947 snd_pcm_stream_lock_irq(substream); 2948 avail = snd_pcm_capture_avail(runtime); 2949 switch (runtime->status->state) { 2950 case SNDRV_PCM_STATE_RUNNING: 2951 case SNDRV_PCM_STATE_PREPARED: 2952 case SNDRV_PCM_STATE_PAUSED: 2953 if (avail >= runtime->control->avail_min) { 2954 mask = POLLIN | POLLRDNORM; 2955 break; 2956 } 2957 mask = 0; 2958 break; 2959 case SNDRV_PCM_STATE_DRAINING: 2960 if (avail > 0) { 2961 mask = POLLIN | POLLRDNORM; 2962 break; 2963 } 2964 /* Fall through */ 2965 default: 2966 mask = POLLIN | POLLRDNORM | POLLERR; 2967 break; 2968 } 2969 snd_pcm_stream_unlock_irq(substream); 2970 return mask; 2971 } 2972 2973 /* 2974 * mmap support 2975 */ 2976 2977 /* 2978 * Only on coherent architectures, we can mmap the status and the control records 2979 * for effcient data transfer. On others, we have to use HWSYNC ioctl... 2980 */ 2981 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) 2982 /* 2983 * mmap status record 2984 */ 2985 static struct page * snd_pcm_mmap_status_nopage(struct vm_area_struct *area, 2986 unsigned long address, int *type) 2987 { 2988 struct snd_pcm_substream *substream = area->vm_private_data; 2989 struct snd_pcm_runtime *runtime; 2990 struct page * page; 2991 2992 if (substream == NULL) 2993 return NOPAGE_OOM; 2994 runtime = substream->runtime; 2995 page = virt_to_page(runtime->status); 2996 get_page(page); 2997 if (type) 2998 *type = VM_FAULT_MINOR; 2999 return page; 3000 } 3001 3002 static struct vm_operations_struct snd_pcm_vm_ops_status = 3003 { 3004 .nopage = snd_pcm_mmap_status_nopage, 3005 }; 3006 3007 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, 3008 struct vm_area_struct *area) 3009 { 3010 struct snd_pcm_runtime *runtime; 3011 long size; 3012 if (!(area->vm_flags & VM_READ)) 3013 return -EINVAL; 3014 runtime = substream->runtime; 3015 snd_assert(runtime != NULL, return -EAGAIN); 3016 size = area->vm_end - area->vm_start; 3017 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))) 3018 return -EINVAL; 3019 area->vm_ops = &snd_pcm_vm_ops_status; 3020 area->vm_private_data = substream; 3021 area->vm_flags |= VM_RESERVED; 3022 return 0; 3023 } 3024 3025 /* 3026 * mmap control record 3027 */ 3028 static struct page * snd_pcm_mmap_control_nopage(struct vm_area_struct *area, 3029 unsigned long address, int *type) 3030 { 3031 struct snd_pcm_substream *substream = area->vm_private_data; 3032 struct snd_pcm_runtime *runtime; 3033 struct page * page; 3034 3035 if (substream == NULL) 3036 return NOPAGE_OOM; 3037 runtime = substream->runtime; 3038 page = virt_to_page(runtime->control); 3039 get_page(page); 3040 if (type) 3041 *type = VM_FAULT_MINOR; 3042 return page; 3043 } 3044 3045 static struct vm_operations_struct snd_pcm_vm_ops_control = 3046 { 3047 .nopage = snd_pcm_mmap_control_nopage, 3048 }; 3049 3050 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, 3051 struct vm_area_struct *area) 3052 { 3053 struct snd_pcm_runtime *runtime; 3054 long size; 3055 if (!(area->vm_flags & VM_READ)) 3056 return -EINVAL; 3057 runtime = substream->runtime; 3058 snd_assert(runtime != NULL, return -EAGAIN); 3059 size = area->vm_end - area->vm_start; 3060 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))) 3061 return -EINVAL; 3062 area->vm_ops = &snd_pcm_vm_ops_control; 3063 area->vm_private_data = substream; 3064 area->vm_flags |= VM_RESERVED; 3065 return 0; 3066 } 3067 #else /* ! coherent mmap */ 3068 /* 3069 * don't support mmap for status and control records. 3070 */ 3071 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, 3072 struct vm_area_struct *area) 3073 { 3074 return -ENXIO; 3075 } 3076 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, 3077 struct vm_area_struct *area) 3078 { 3079 return -ENXIO; 3080 } 3081 #endif /* coherent mmap */ 3082 3083 /* 3084 * nopage callback for mmapping a RAM page 3085 */ 3086 static struct page *snd_pcm_mmap_data_nopage(struct vm_area_struct *area, 3087 unsigned long address, int *type) 3088 { 3089 struct snd_pcm_substream *substream = area->vm_private_data; 3090 struct snd_pcm_runtime *runtime; 3091 unsigned long offset; 3092 struct page * page; 3093 void *vaddr; 3094 size_t dma_bytes; 3095 3096 if (substream == NULL) 3097 return NOPAGE_OOM; 3098 runtime = substream->runtime; 3099 offset = area->vm_pgoff << PAGE_SHIFT; 3100 offset += address - area->vm_start; 3101 snd_assert((offset % PAGE_SIZE) == 0, return NOPAGE_OOM); 3102 dma_bytes = PAGE_ALIGN(runtime->dma_bytes); 3103 if (offset > dma_bytes - PAGE_SIZE) 3104 return NOPAGE_SIGBUS; 3105 if (substream->ops->page) { 3106 page = substream->ops->page(substream, offset); 3107 if (! page) 3108 return NOPAGE_OOM; 3109 } else { 3110 vaddr = runtime->dma_area + offset; 3111 page = virt_to_page(vaddr); 3112 } 3113 get_page(page); 3114 if (type) 3115 *type = VM_FAULT_MINOR; 3116 return page; 3117 } 3118 3119 static struct vm_operations_struct snd_pcm_vm_ops_data = 3120 { 3121 .open = snd_pcm_mmap_data_open, 3122 .close = snd_pcm_mmap_data_close, 3123 .nopage = snd_pcm_mmap_data_nopage, 3124 }; 3125 3126 /* 3127 * mmap the DMA buffer on RAM 3128 */ 3129 static int snd_pcm_default_mmap(struct snd_pcm_substream *substream, 3130 struct vm_area_struct *area) 3131 { 3132 area->vm_ops = &snd_pcm_vm_ops_data; 3133 area->vm_private_data = substream; 3134 area->vm_flags |= VM_RESERVED; 3135 atomic_inc(&substream->runtime->mmap_count); 3136 return 0; 3137 } 3138 3139 /* 3140 * mmap the DMA buffer on I/O memory area 3141 */ 3142 #if SNDRV_PCM_INFO_MMAP_IOMEM 3143 static struct vm_operations_struct snd_pcm_vm_ops_data_mmio = 3144 { 3145 .open = snd_pcm_mmap_data_open, 3146 .close = snd_pcm_mmap_data_close, 3147 }; 3148 3149 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, 3150 struct vm_area_struct *area) 3151 { 3152 long size; 3153 unsigned long offset; 3154 3155 #ifdef pgprot_noncached 3156 area->vm_page_prot = pgprot_noncached(area->vm_page_prot); 3157 #endif 3158 area->vm_ops = &snd_pcm_vm_ops_data_mmio; 3159 area->vm_private_data = substream; 3160 area->vm_flags |= VM_IO; 3161 size = area->vm_end - area->vm_start; 3162 offset = area->vm_pgoff << PAGE_SHIFT; 3163 if (io_remap_pfn_range(area, area->vm_start, 3164 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT, 3165 size, area->vm_page_prot)) 3166 return -EAGAIN; 3167 atomic_inc(&substream->runtime->mmap_count); 3168 return 0; 3169 } 3170 #endif /* SNDRV_PCM_INFO_MMAP */ 3171 3172 /* 3173 * mmap DMA buffer 3174 */ 3175 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, 3176 struct vm_area_struct *area) 3177 { 3178 struct snd_pcm_runtime *runtime; 3179 long size; 3180 unsigned long offset; 3181 size_t dma_bytes; 3182 3183 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 3184 if (!(area->vm_flags & (VM_WRITE|VM_READ))) 3185 return -EINVAL; 3186 } else { 3187 if (!(area->vm_flags & VM_READ)) 3188 return -EINVAL; 3189 } 3190 runtime = substream->runtime; 3191 snd_assert(runtime != NULL, return -EAGAIN); 3192 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 3193 return -EBADFD; 3194 if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) 3195 return -ENXIO; 3196 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || 3197 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) 3198 return -EINVAL; 3199 size = area->vm_end - area->vm_start; 3200 offset = area->vm_pgoff << PAGE_SHIFT; 3201 dma_bytes = PAGE_ALIGN(runtime->dma_bytes); 3202 if ((size_t)size > dma_bytes) 3203 return -EINVAL; 3204 if (offset > dma_bytes - size) 3205 return -EINVAL; 3206 3207 if (substream->ops->mmap) 3208 return substream->ops->mmap(substream, area); 3209 else 3210 return snd_pcm_default_mmap(substream, area); 3211 } 3212 3213 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area) 3214 { 3215 struct snd_pcm_file * pcm_file; 3216 struct snd_pcm_substream *substream; 3217 unsigned long offset; 3218 3219 pcm_file = file->private_data; 3220 substream = pcm_file->substream; 3221 snd_assert(substream != NULL, return -ENXIO); 3222 3223 offset = area->vm_pgoff << PAGE_SHIFT; 3224 switch (offset) { 3225 case SNDRV_PCM_MMAP_OFFSET_STATUS: 3226 if (substream->no_mmap_ctrl) 3227 return -ENXIO; 3228 return snd_pcm_mmap_status(substream, file, area); 3229 case SNDRV_PCM_MMAP_OFFSET_CONTROL: 3230 if (substream->no_mmap_ctrl) 3231 return -ENXIO; 3232 return snd_pcm_mmap_control(substream, file, area); 3233 default: 3234 return snd_pcm_mmap_data(substream, file, area); 3235 } 3236 return 0; 3237 } 3238 3239 static int snd_pcm_fasync(int fd, struct file * file, int on) 3240 { 3241 struct snd_pcm_file * pcm_file; 3242 struct snd_pcm_substream *substream; 3243 struct snd_pcm_runtime *runtime; 3244 int err; 3245 3246 pcm_file = file->private_data; 3247 substream = pcm_file->substream; 3248 snd_assert(substream != NULL, return -ENXIO); 3249 runtime = substream->runtime; 3250 3251 err = fasync_helper(fd, file, on, &runtime->fasync); 3252 if (err < 0) 3253 return err; 3254 return 0; 3255 } 3256 3257 /* 3258 * ioctl32 compat 3259 */ 3260 #ifdef CONFIG_COMPAT 3261 #include "pcm_compat.c" 3262 #else 3263 #define snd_pcm_ioctl_compat NULL 3264 #endif 3265 3266 /* 3267 * To be removed helpers to keep binary compatibility 3268 */ 3269 3270 #ifdef CONFIG_SND_SUPPORT_OLD_API 3271 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5)) 3272 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5)) 3273 3274 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params, 3275 struct snd_pcm_hw_params_old *oparams) 3276 { 3277 unsigned int i; 3278 3279 memset(params, 0, sizeof(*params)); 3280 params->flags = oparams->flags; 3281 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) 3282 params->masks[i].bits[0] = oparams->masks[i]; 3283 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals)); 3284 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask); 3285 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask); 3286 params->info = oparams->info; 3287 params->msbits = oparams->msbits; 3288 params->rate_num = oparams->rate_num; 3289 params->rate_den = oparams->rate_den; 3290 params->fifo_size = oparams->fifo_size; 3291 } 3292 3293 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams, 3294 struct snd_pcm_hw_params *params) 3295 { 3296 unsigned int i; 3297 3298 memset(oparams, 0, sizeof(*oparams)); 3299 oparams->flags = params->flags; 3300 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) 3301 oparams->masks[i] = params->masks[i].bits[0]; 3302 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals)); 3303 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask); 3304 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask); 3305 oparams->info = params->info; 3306 oparams->msbits = params->msbits; 3307 oparams->rate_num = params->rate_num; 3308 oparams->rate_den = params->rate_den; 3309 oparams->fifo_size = params->fifo_size; 3310 } 3311 3312 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, 3313 struct snd_pcm_hw_params_old __user * _oparams) 3314 { 3315 struct snd_pcm_hw_params *params; 3316 struct snd_pcm_hw_params_old *oparams = NULL; 3317 int err; 3318 3319 params = kmalloc(sizeof(*params), GFP_KERNEL); 3320 if (!params) { 3321 err = -ENOMEM; 3322 goto out; 3323 } 3324 oparams = kmalloc(sizeof(*oparams), GFP_KERNEL); 3325 if (!oparams) { 3326 err = -ENOMEM; 3327 goto out; 3328 } 3329 3330 if (copy_from_user(oparams, _oparams, sizeof(*oparams))) { 3331 err = -EFAULT; 3332 goto out; 3333 } 3334 snd_pcm_hw_convert_from_old_params(params, oparams); 3335 err = snd_pcm_hw_refine(substream, params); 3336 snd_pcm_hw_convert_to_old_params(oparams, params); 3337 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { 3338 if (!err) 3339 err = -EFAULT; 3340 } 3341 out: 3342 kfree(params); 3343 kfree(oparams); 3344 return err; 3345 } 3346 3347 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, 3348 struct snd_pcm_hw_params_old __user * _oparams) 3349 { 3350 struct snd_pcm_hw_params *params; 3351 struct snd_pcm_hw_params_old *oparams = NULL; 3352 int err; 3353 3354 params = kmalloc(sizeof(*params), GFP_KERNEL); 3355 if (!params) { 3356 err = -ENOMEM; 3357 goto out; 3358 } 3359 oparams = kmalloc(sizeof(*oparams), GFP_KERNEL); 3360 if (!oparams) { 3361 err = -ENOMEM; 3362 goto out; 3363 } 3364 if (copy_from_user(oparams, _oparams, sizeof(*oparams))) { 3365 err = -EFAULT; 3366 goto out; 3367 } 3368 snd_pcm_hw_convert_from_old_params(params, oparams); 3369 err = snd_pcm_hw_params(substream, params); 3370 snd_pcm_hw_convert_to_old_params(oparams, params); 3371 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { 3372 if (!err) 3373 err = -EFAULT; 3374 } 3375 out: 3376 kfree(params); 3377 kfree(oparams); 3378 return err; 3379 } 3380 #endif /* CONFIG_SND_SUPPORT_OLD_API */ 3381 3382 /* 3383 * Register section 3384 */ 3385 3386 struct file_operations snd_pcm_f_ops[2] = { 3387 { 3388 .owner = THIS_MODULE, 3389 .write = snd_pcm_write, 3390 .writev = snd_pcm_writev, 3391 .open = snd_pcm_playback_open, 3392 .release = snd_pcm_release, 3393 .poll = snd_pcm_playback_poll, 3394 .unlocked_ioctl = snd_pcm_playback_ioctl, 3395 .compat_ioctl = snd_pcm_ioctl_compat, 3396 .mmap = snd_pcm_mmap, 3397 .fasync = snd_pcm_fasync, 3398 }, 3399 { 3400 .owner = THIS_MODULE, 3401 .read = snd_pcm_read, 3402 .readv = snd_pcm_readv, 3403 .open = snd_pcm_capture_open, 3404 .release = snd_pcm_release, 3405 .poll = snd_pcm_capture_poll, 3406 .unlocked_ioctl = snd_pcm_capture_ioctl, 3407 .compat_ioctl = snd_pcm_ioctl_compat, 3408 .mmap = snd_pcm_mmap, 3409 .fasync = snd_pcm_fasync, 3410 } 3411 }; 3412