1 /* 2 * Digital Audio (PCM) abstract layer 3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 4 * 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 * 20 */ 21 22 #include <linux/mm.h> 23 #include <linux/file.h> 24 #include <linux/slab.h> 25 #include <linux/smp_lock.h> 26 #include <linux/time.h> 27 #include <linux/pm_qos_params.h> 28 #include <linux/uio.h> 29 #include <linux/dma-mapping.h> 30 #include <linux/math64.h> 31 #include <sound/core.h> 32 #include <sound/control.h> 33 #include <sound/info.h> 34 #include <sound/pcm.h> 35 #include <sound/pcm_params.h> 36 #include <sound/timer.h> 37 #include <sound/minors.h> 38 #include <asm/io.h> 39 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT) 40 #include <dma-coherence.h> 41 #endif 42 43 /* 44 * Compatibility 45 */ 46 47 struct snd_pcm_hw_params_old { 48 unsigned int flags; 49 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT - 50 SNDRV_PCM_HW_PARAM_ACCESS + 1]; 51 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME - 52 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1]; 53 unsigned int rmask; 54 unsigned int cmask; 55 unsigned int info; 56 unsigned int msbits; 57 unsigned int rate_num; 58 unsigned int rate_den; 59 snd_pcm_uframes_t fifo_size; 60 unsigned char reserved[64]; 61 }; 62 63 #ifdef CONFIG_SND_SUPPORT_OLD_API 64 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old) 65 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old) 66 67 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, 68 struct snd_pcm_hw_params_old __user * _oparams); 69 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, 70 struct snd_pcm_hw_params_old __user * _oparams); 71 #endif 72 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream); 73 74 /* 75 * 76 */ 77 78 DEFINE_RWLOCK(snd_pcm_link_rwlock); 79 EXPORT_SYMBOL(snd_pcm_link_rwlock); 80 81 static DECLARE_RWSEM(snd_pcm_link_rwsem); 82 83 static inline mm_segment_t snd_enter_user(void) 84 { 85 mm_segment_t fs = get_fs(); 86 set_fs(get_ds()); 87 return fs; 88 } 89 90 static inline void snd_leave_user(mm_segment_t fs) 91 { 92 set_fs(fs); 93 } 94 95 96 97 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info) 98 { 99 struct snd_pcm_runtime *runtime; 100 struct snd_pcm *pcm = substream->pcm; 101 struct snd_pcm_str *pstr = substream->pstr; 102 103 memset(info, 0, sizeof(*info)); 104 info->card = pcm->card->number; 105 info->device = pcm->device; 106 info->stream = substream->stream; 107 info->subdevice = substream->number; 108 strlcpy(info->id, pcm->id, sizeof(info->id)); 109 strlcpy(info->name, pcm->name, sizeof(info->name)); 110 info->dev_class = pcm->dev_class; 111 info->dev_subclass = pcm->dev_subclass; 112 info->subdevices_count = pstr->substream_count; 113 info->subdevices_avail = pstr->substream_count - pstr->substream_opened; 114 strlcpy(info->subname, substream->name, sizeof(info->subname)); 115 runtime = substream->runtime; 116 /* AB: FIXME!!! This is definitely nonsense */ 117 if (runtime) { 118 info->sync = runtime->sync; 119 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info); 120 } 121 return 0; 122 } 123 124 int snd_pcm_info_user(struct snd_pcm_substream *substream, 125 struct snd_pcm_info __user * _info) 126 { 127 struct snd_pcm_info *info; 128 int err; 129 130 info = kmalloc(sizeof(*info), GFP_KERNEL); 131 if (! info) 132 return -ENOMEM; 133 err = snd_pcm_info(substream, info); 134 if (err >= 0) { 135 if (copy_to_user(_info, info, sizeof(*info))) 136 err = -EFAULT; 137 } 138 kfree(info); 139 return err; 140 } 141 142 #undef RULES_DEBUG 143 144 #ifdef RULES_DEBUG 145 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v 146 char *snd_pcm_hw_param_names[] = { 147 HW_PARAM(ACCESS), 148 HW_PARAM(FORMAT), 149 HW_PARAM(SUBFORMAT), 150 HW_PARAM(SAMPLE_BITS), 151 HW_PARAM(FRAME_BITS), 152 HW_PARAM(CHANNELS), 153 HW_PARAM(RATE), 154 HW_PARAM(PERIOD_TIME), 155 HW_PARAM(PERIOD_SIZE), 156 HW_PARAM(PERIOD_BYTES), 157 HW_PARAM(PERIODS), 158 HW_PARAM(BUFFER_TIME), 159 HW_PARAM(BUFFER_SIZE), 160 HW_PARAM(BUFFER_BYTES), 161 HW_PARAM(TICK_TIME), 162 }; 163 #endif 164 165 int snd_pcm_hw_refine(struct snd_pcm_substream *substream, 166 struct snd_pcm_hw_params *params) 167 { 168 unsigned int k; 169 struct snd_pcm_hardware *hw; 170 struct snd_interval *i = NULL; 171 struct snd_mask *m = NULL; 172 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints; 173 unsigned int rstamps[constrs->rules_num]; 174 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1]; 175 unsigned int stamp = 2; 176 int changed, again; 177 178 params->info = 0; 179 params->fifo_size = 0; 180 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS)) 181 params->msbits = 0; 182 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) { 183 params->rate_num = 0; 184 params->rate_den = 0; 185 } 186 187 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { 188 m = hw_param_mask(params, k); 189 if (snd_mask_empty(m)) 190 return -EINVAL; 191 if (!(params->rmask & (1 << k))) 192 continue; 193 #ifdef RULES_DEBUG 194 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]); 195 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); 196 #endif 197 changed = snd_mask_refine(m, constrs_mask(constrs, k)); 198 #ifdef RULES_DEBUG 199 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]); 200 #endif 201 if (changed) 202 params->cmask |= 1 << k; 203 if (changed < 0) 204 return changed; 205 } 206 207 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { 208 i = hw_param_interval(params, k); 209 if (snd_interval_empty(i)) 210 return -EINVAL; 211 if (!(params->rmask & (1 << k))) 212 continue; 213 #ifdef RULES_DEBUG 214 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]); 215 if (i->empty) 216 printk("empty"); 217 else 218 printk("%c%u %u%c", 219 i->openmin ? '(' : '[', i->min, 220 i->max, i->openmax ? ')' : ']'); 221 printk(" -> "); 222 #endif 223 changed = snd_interval_refine(i, constrs_interval(constrs, k)); 224 #ifdef RULES_DEBUG 225 if (i->empty) 226 printk("empty\n"); 227 else 228 printk("%c%u %u%c\n", 229 i->openmin ? '(' : '[', i->min, 230 i->max, i->openmax ? ')' : ']'); 231 #endif 232 if (changed) 233 params->cmask |= 1 << k; 234 if (changed < 0) 235 return changed; 236 } 237 238 for (k = 0; k < constrs->rules_num; k++) 239 rstamps[k] = 0; 240 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) 241 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0; 242 do { 243 again = 0; 244 for (k = 0; k < constrs->rules_num; k++) { 245 struct snd_pcm_hw_rule *r = &constrs->rules[k]; 246 unsigned int d; 247 int doit = 0; 248 if (r->cond && !(r->cond & params->flags)) 249 continue; 250 for (d = 0; r->deps[d] >= 0; d++) { 251 if (vstamps[r->deps[d]] > rstamps[k]) { 252 doit = 1; 253 break; 254 } 255 } 256 if (!doit) 257 continue; 258 #ifdef RULES_DEBUG 259 printk(KERN_DEBUG "Rule %d [%p]: ", k, r->func); 260 if (r->var >= 0) { 261 printk("%s = ", snd_pcm_hw_param_names[r->var]); 262 if (hw_is_mask(r->var)) { 263 m = hw_param_mask(params, r->var); 264 printk("%x", *m->bits); 265 } else { 266 i = hw_param_interval(params, r->var); 267 if (i->empty) 268 printk("empty"); 269 else 270 printk("%c%u %u%c", 271 i->openmin ? '(' : '[', i->min, 272 i->max, i->openmax ? ')' : ']'); 273 } 274 } 275 #endif 276 changed = r->func(params, r); 277 #ifdef RULES_DEBUG 278 if (r->var >= 0) { 279 printk(" -> "); 280 if (hw_is_mask(r->var)) 281 printk("%x", *m->bits); 282 else { 283 if (i->empty) 284 printk("empty"); 285 else 286 printk("%c%u %u%c", 287 i->openmin ? '(' : '[', i->min, 288 i->max, i->openmax ? ')' : ']'); 289 } 290 } 291 printk("\n"); 292 #endif 293 rstamps[k] = stamp; 294 if (changed && r->var >= 0) { 295 params->cmask |= (1 << r->var); 296 vstamps[r->var] = stamp; 297 again = 1; 298 } 299 if (changed < 0) 300 return changed; 301 stamp++; 302 } 303 } while (again); 304 if (!params->msbits) { 305 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); 306 if (snd_interval_single(i)) 307 params->msbits = snd_interval_value(i); 308 } 309 310 if (!params->rate_den) { 311 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); 312 if (snd_interval_single(i)) { 313 params->rate_num = snd_interval_value(i); 314 params->rate_den = 1; 315 } 316 } 317 318 hw = &substream->runtime->hw; 319 if (!params->info) 320 params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES; 321 if (!params->fifo_size) { 322 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 323 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 324 if (snd_mask_min(m) == snd_mask_max(m) && 325 snd_interval_min(i) == snd_interval_max(i)) { 326 changed = substream->ops->ioctl(substream, 327 SNDRV_PCM_IOCTL1_FIFO_SIZE, params); 328 if (changed < 0) 329 return changed; 330 } 331 } 332 params->rmask = 0; 333 return 0; 334 } 335 336 EXPORT_SYMBOL(snd_pcm_hw_refine); 337 338 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream, 339 struct snd_pcm_hw_params __user * _params) 340 { 341 struct snd_pcm_hw_params *params; 342 int err; 343 344 params = memdup_user(_params, sizeof(*params)); 345 if (IS_ERR(params)) 346 return PTR_ERR(params); 347 348 err = snd_pcm_hw_refine(substream, params); 349 if (copy_to_user(_params, params, sizeof(*params))) { 350 if (!err) 351 err = -EFAULT; 352 } 353 354 kfree(params); 355 return err; 356 } 357 358 static int period_to_usecs(struct snd_pcm_runtime *runtime) 359 { 360 int usecs; 361 362 if (! runtime->rate) 363 return -1; /* invalid */ 364 365 /* take 75% of period time as the deadline */ 366 usecs = (750000 / runtime->rate) * runtime->period_size; 367 usecs += ((750000 % runtime->rate) * runtime->period_size) / 368 runtime->rate; 369 370 return usecs; 371 } 372 373 static int calc_boundary(struct snd_pcm_runtime *runtime) 374 { 375 u_int64_t boundary; 376 377 boundary = (u_int64_t)runtime->buffer_size * 378 (u_int64_t)runtime->period_size; 379 #if BITS_PER_LONG < 64 380 /* try to find lowest common multiple for buffer and period */ 381 if (boundary > LONG_MAX - runtime->buffer_size) { 382 u_int32_t remainder = -1; 383 u_int32_t divident = runtime->buffer_size; 384 u_int32_t divisor = runtime->period_size; 385 while (remainder) { 386 remainder = divident % divisor; 387 if (remainder) { 388 divident = divisor; 389 divisor = remainder; 390 } 391 } 392 boundary = div_u64(boundary, divisor); 393 if (boundary > LONG_MAX - runtime->buffer_size) 394 return -ERANGE; 395 } 396 #endif 397 if (boundary == 0) 398 return -ERANGE; 399 runtime->boundary = boundary; 400 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size) 401 runtime->boundary *= 2; 402 return 0; 403 } 404 405 static int snd_pcm_hw_params(struct snd_pcm_substream *substream, 406 struct snd_pcm_hw_params *params) 407 { 408 struct snd_pcm_runtime *runtime; 409 int err, usecs; 410 unsigned int bits; 411 snd_pcm_uframes_t frames; 412 413 if (PCM_RUNTIME_CHECK(substream)) 414 return -ENXIO; 415 runtime = substream->runtime; 416 snd_pcm_stream_lock_irq(substream); 417 switch (runtime->status->state) { 418 case SNDRV_PCM_STATE_OPEN: 419 case SNDRV_PCM_STATE_SETUP: 420 case SNDRV_PCM_STATE_PREPARED: 421 break; 422 default: 423 snd_pcm_stream_unlock_irq(substream); 424 return -EBADFD; 425 } 426 snd_pcm_stream_unlock_irq(substream); 427 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 428 if (!substream->oss.oss) 429 #endif 430 if (atomic_read(&substream->mmap_count)) 431 return -EBADFD; 432 433 params->rmask = ~0U; 434 err = snd_pcm_hw_refine(substream, params); 435 if (err < 0) 436 goto _error; 437 438 err = snd_pcm_hw_params_choose(substream, params); 439 if (err < 0) 440 goto _error; 441 442 if (substream->ops->hw_params != NULL) { 443 err = substream->ops->hw_params(substream, params); 444 if (err < 0) 445 goto _error; 446 } 447 448 runtime->access = params_access(params); 449 runtime->format = params_format(params); 450 runtime->subformat = params_subformat(params); 451 runtime->channels = params_channels(params); 452 runtime->rate = params_rate(params); 453 runtime->period_size = params_period_size(params); 454 runtime->periods = params_periods(params); 455 runtime->buffer_size = params_buffer_size(params); 456 runtime->info = params->info; 457 runtime->rate_num = params->rate_num; 458 runtime->rate_den = params->rate_den; 459 460 bits = snd_pcm_format_physical_width(runtime->format); 461 runtime->sample_bits = bits; 462 bits *= runtime->channels; 463 runtime->frame_bits = bits; 464 frames = 1; 465 while (bits % 8 != 0) { 466 bits *= 2; 467 frames *= 2; 468 } 469 runtime->byte_align = bits / 8; 470 runtime->min_align = frames; 471 472 /* Default sw params */ 473 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; 474 runtime->period_step = 1; 475 runtime->control->avail_min = runtime->period_size; 476 runtime->start_threshold = 1; 477 runtime->stop_threshold = runtime->buffer_size; 478 runtime->silence_threshold = 0; 479 runtime->silence_size = 0; 480 err = calc_boundary(runtime); 481 if (err < 0) 482 goto _error; 483 484 snd_pcm_timer_resolution_change(substream); 485 runtime->status->state = SNDRV_PCM_STATE_SETUP; 486 487 if (substream->latency_pm_qos_req) { 488 pm_qos_remove_request(substream->latency_pm_qos_req); 489 substream->latency_pm_qos_req = NULL; 490 } 491 if ((usecs = period_to_usecs(runtime)) >= 0) 492 substream->latency_pm_qos_req = pm_qos_add_request( 493 PM_QOS_CPU_DMA_LATENCY, usecs); 494 return 0; 495 _error: 496 /* hardware might be unuseable from this time, 497 so we force application to retry to set 498 the correct hardware parameter settings */ 499 runtime->status->state = SNDRV_PCM_STATE_OPEN; 500 if (substream->ops->hw_free != NULL) 501 substream->ops->hw_free(substream); 502 return err; 503 } 504 505 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream, 506 struct snd_pcm_hw_params __user * _params) 507 { 508 struct snd_pcm_hw_params *params; 509 int err; 510 511 params = memdup_user(_params, sizeof(*params)); 512 if (IS_ERR(params)) 513 return PTR_ERR(params); 514 515 err = snd_pcm_hw_params(substream, params); 516 if (copy_to_user(_params, params, sizeof(*params))) { 517 if (!err) 518 err = -EFAULT; 519 } 520 521 kfree(params); 522 return err; 523 } 524 525 static int snd_pcm_hw_free(struct snd_pcm_substream *substream) 526 { 527 struct snd_pcm_runtime *runtime; 528 int result = 0; 529 530 if (PCM_RUNTIME_CHECK(substream)) 531 return -ENXIO; 532 runtime = substream->runtime; 533 snd_pcm_stream_lock_irq(substream); 534 switch (runtime->status->state) { 535 case SNDRV_PCM_STATE_SETUP: 536 case SNDRV_PCM_STATE_PREPARED: 537 break; 538 default: 539 snd_pcm_stream_unlock_irq(substream); 540 return -EBADFD; 541 } 542 snd_pcm_stream_unlock_irq(substream); 543 if (atomic_read(&substream->mmap_count)) 544 return -EBADFD; 545 if (substream->ops->hw_free) 546 result = substream->ops->hw_free(substream); 547 runtime->status->state = SNDRV_PCM_STATE_OPEN; 548 pm_qos_remove_request(substream->latency_pm_qos_req); 549 substream->latency_pm_qos_req = NULL; 550 return result; 551 } 552 553 static int snd_pcm_sw_params(struct snd_pcm_substream *substream, 554 struct snd_pcm_sw_params *params) 555 { 556 struct snd_pcm_runtime *runtime; 557 int err; 558 559 if (PCM_RUNTIME_CHECK(substream)) 560 return -ENXIO; 561 runtime = substream->runtime; 562 snd_pcm_stream_lock_irq(substream); 563 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 564 snd_pcm_stream_unlock_irq(substream); 565 return -EBADFD; 566 } 567 snd_pcm_stream_unlock_irq(substream); 568 569 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST) 570 return -EINVAL; 571 if (params->avail_min == 0) 572 return -EINVAL; 573 if (params->silence_size >= runtime->boundary) { 574 if (params->silence_threshold != 0) 575 return -EINVAL; 576 } else { 577 if (params->silence_size > params->silence_threshold) 578 return -EINVAL; 579 if (params->silence_threshold > runtime->buffer_size) 580 return -EINVAL; 581 } 582 err = 0; 583 snd_pcm_stream_lock_irq(substream); 584 runtime->tstamp_mode = params->tstamp_mode; 585 runtime->period_step = params->period_step; 586 runtime->control->avail_min = params->avail_min; 587 runtime->start_threshold = params->start_threshold; 588 runtime->stop_threshold = params->stop_threshold; 589 runtime->silence_threshold = params->silence_threshold; 590 runtime->silence_size = params->silence_size; 591 params->boundary = runtime->boundary; 592 if (snd_pcm_running(substream)) { 593 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 594 runtime->silence_size > 0) 595 snd_pcm_playback_silence(substream, ULONG_MAX); 596 err = snd_pcm_update_state(substream, runtime); 597 } 598 snd_pcm_stream_unlock_irq(substream); 599 return err; 600 } 601 602 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream, 603 struct snd_pcm_sw_params __user * _params) 604 { 605 struct snd_pcm_sw_params params; 606 int err; 607 if (copy_from_user(¶ms, _params, sizeof(params))) 608 return -EFAULT; 609 err = snd_pcm_sw_params(substream, ¶ms); 610 if (copy_to_user(_params, ¶ms, sizeof(params))) 611 return -EFAULT; 612 return err; 613 } 614 615 int snd_pcm_status(struct snd_pcm_substream *substream, 616 struct snd_pcm_status *status) 617 { 618 struct snd_pcm_runtime *runtime = substream->runtime; 619 620 snd_pcm_stream_lock_irq(substream); 621 status->state = runtime->status->state; 622 status->suspended_state = runtime->status->suspended_state; 623 if (status->state == SNDRV_PCM_STATE_OPEN) 624 goto _end; 625 status->trigger_tstamp = runtime->trigger_tstamp; 626 if (snd_pcm_running(substream)) { 627 snd_pcm_update_hw_ptr(substream); 628 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { 629 status->tstamp = runtime->status->tstamp; 630 goto _tstamp_end; 631 } 632 } 633 snd_pcm_gettime(runtime, &status->tstamp); 634 _tstamp_end: 635 status->appl_ptr = runtime->control->appl_ptr; 636 status->hw_ptr = runtime->status->hw_ptr; 637 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 638 status->avail = snd_pcm_playback_avail(runtime); 639 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING || 640 runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 641 status->delay = runtime->buffer_size - status->avail; 642 status->delay += runtime->delay; 643 } else 644 status->delay = 0; 645 } else { 646 status->avail = snd_pcm_capture_avail(runtime); 647 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) 648 status->delay = status->avail + runtime->delay; 649 else 650 status->delay = 0; 651 } 652 status->avail_max = runtime->avail_max; 653 status->overrange = runtime->overrange; 654 runtime->avail_max = 0; 655 runtime->overrange = 0; 656 _end: 657 snd_pcm_stream_unlock_irq(substream); 658 return 0; 659 } 660 661 static int snd_pcm_status_user(struct snd_pcm_substream *substream, 662 struct snd_pcm_status __user * _status) 663 { 664 struct snd_pcm_status status; 665 int res; 666 667 memset(&status, 0, sizeof(status)); 668 res = snd_pcm_status(substream, &status); 669 if (res < 0) 670 return res; 671 if (copy_to_user(_status, &status, sizeof(status))) 672 return -EFAULT; 673 return 0; 674 } 675 676 static int snd_pcm_channel_info(struct snd_pcm_substream *substream, 677 struct snd_pcm_channel_info * info) 678 { 679 struct snd_pcm_runtime *runtime; 680 unsigned int channel; 681 682 channel = info->channel; 683 runtime = substream->runtime; 684 snd_pcm_stream_lock_irq(substream); 685 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { 686 snd_pcm_stream_unlock_irq(substream); 687 return -EBADFD; 688 } 689 snd_pcm_stream_unlock_irq(substream); 690 if (channel >= runtime->channels) 691 return -EINVAL; 692 memset(info, 0, sizeof(*info)); 693 info->channel = channel; 694 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info); 695 } 696 697 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream, 698 struct snd_pcm_channel_info __user * _info) 699 { 700 struct snd_pcm_channel_info info; 701 int res; 702 703 if (copy_from_user(&info, _info, sizeof(info))) 704 return -EFAULT; 705 res = snd_pcm_channel_info(substream, &info); 706 if (res < 0) 707 return res; 708 if (copy_to_user(_info, &info, sizeof(info))) 709 return -EFAULT; 710 return 0; 711 } 712 713 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream) 714 { 715 struct snd_pcm_runtime *runtime = substream->runtime; 716 if (runtime->trigger_master == NULL) 717 return; 718 if (runtime->trigger_master == substream) { 719 snd_pcm_gettime(runtime, &runtime->trigger_tstamp); 720 } else { 721 snd_pcm_trigger_tstamp(runtime->trigger_master); 722 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp; 723 } 724 runtime->trigger_master = NULL; 725 } 726 727 struct action_ops { 728 int (*pre_action)(struct snd_pcm_substream *substream, int state); 729 int (*do_action)(struct snd_pcm_substream *substream, int state); 730 void (*undo_action)(struct snd_pcm_substream *substream, int state); 731 void (*post_action)(struct snd_pcm_substream *substream, int state); 732 }; 733 734 /* 735 * this functions is core for handling of linked stream 736 * Note: the stream state might be changed also on failure 737 * Note2: call with calling stream lock + link lock 738 */ 739 static int snd_pcm_action_group(struct action_ops *ops, 740 struct snd_pcm_substream *substream, 741 int state, int do_lock) 742 { 743 struct snd_pcm_substream *s = NULL; 744 struct snd_pcm_substream *s1; 745 int res = 0; 746 747 snd_pcm_group_for_each_entry(s, substream) { 748 if (do_lock && s != substream) 749 spin_lock_nested(&s->self_group.lock, 750 SINGLE_DEPTH_NESTING); 751 res = ops->pre_action(s, state); 752 if (res < 0) 753 goto _unlock; 754 } 755 snd_pcm_group_for_each_entry(s, substream) { 756 res = ops->do_action(s, state); 757 if (res < 0) { 758 if (ops->undo_action) { 759 snd_pcm_group_for_each_entry(s1, substream) { 760 if (s1 == s) /* failed stream */ 761 break; 762 ops->undo_action(s1, state); 763 } 764 } 765 s = NULL; /* unlock all */ 766 goto _unlock; 767 } 768 } 769 snd_pcm_group_for_each_entry(s, substream) { 770 ops->post_action(s, state); 771 } 772 _unlock: 773 if (do_lock) { 774 /* unlock streams */ 775 snd_pcm_group_for_each_entry(s1, substream) { 776 if (s1 != substream) 777 spin_unlock(&s1->self_group.lock); 778 if (s1 == s) /* end */ 779 break; 780 } 781 } 782 return res; 783 } 784 785 /* 786 * Note: call with stream lock 787 */ 788 static int snd_pcm_action_single(struct action_ops *ops, 789 struct snd_pcm_substream *substream, 790 int state) 791 { 792 int res; 793 794 res = ops->pre_action(substream, state); 795 if (res < 0) 796 return res; 797 res = ops->do_action(substream, state); 798 if (res == 0) 799 ops->post_action(substream, state); 800 else if (ops->undo_action) 801 ops->undo_action(substream, state); 802 return res; 803 } 804 805 /* 806 * Note: call with stream lock 807 */ 808 static int snd_pcm_action(struct action_ops *ops, 809 struct snd_pcm_substream *substream, 810 int state) 811 { 812 int res; 813 814 if (snd_pcm_stream_linked(substream)) { 815 if (!spin_trylock(&substream->group->lock)) { 816 spin_unlock(&substream->self_group.lock); 817 spin_lock(&substream->group->lock); 818 spin_lock(&substream->self_group.lock); 819 } 820 res = snd_pcm_action_group(ops, substream, state, 1); 821 spin_unlock(&substream->group->lock); 822 } else { 823 res = snd_pcm_action_single(ops, substream, state); 824 } 825 return res; 826 } 827 828 /* 829 * Note: don't use any locks before 830 */ 831 static int snd_pcm_action_lock_irq(struct action_ops *ops, 832 struct snd_pcm_substream *substream, 833 int state) 834 { 835 int res; 836 837 read_lock_irq(&snd_pcm_link_rwlock); 838 if (snd_pcm_stream_linked(substream)) { 839 spin_lock(&substream->group->lock); 840 spin_lock(&substream->self_group.lock); 841 res = snd_pcm_action_group(ops, substream, state, 1); 842 spin_unlock(&substream->self_group.lock); 843 spin_unlock(&substream->group->lock); 844 } else { 845 spin_lock(&substream->self_group.lock); 846 res = snd_pcm_action_single(ops, substream, state); 847 spin_unlock(&substream->self_group.lock); 848 } 849 read_unlock_irq(&snd_pcm_link_rwlock); 850 return res; 851 } 852 853 /* 854 */ 855 static int snd_pcm_action_nonatomic(struct action_ops *ops, 856 struct snd_pcm_substream *substream, 857 int state) 858 { 859 int res; 860 861 down_read(&snd_pcm_link_rwsem); 862 if (snd_pcm_stream_linked(substream)) 863 res = snd_pcm_action_group(ops, substream, state, 0); 864 else 865 res = snd_pcm_action_single(ops, substream, state); 866 up_read(&snd_pcm_link_rwsem); 867 return res; 868 } 869 870 /* 871 * start callbacks 872 */ 873 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state) 874 { 875 struct snd_pcm_runtime *runtime = substream->runtime; 876 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED) 877 return -EBADFD; 878 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 879 !snd_pcm_playback_data(substream)) 880 return -EPIPE; 881 runtime->trigger_master = substream; 882 return 0; 883 } 884 885 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state) 886 { 887 if (substream->runtime->trigger_master != substream) 888 return 0; 889 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START); 890 } 891 892 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state) 893 { 894 if (substream->runtime->trigger_master == substream) 895 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); 896 } 897 898 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state) 899 { 900 struct snd_pcm_runtime *runtime = substream->runtime; 901 snd_pcm_trigger_tstamp(substream); 902 runtime->hw_ptr_jiffies = jiffies; 903 runtime->status->state = state; 904 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 905 runtime->silence_size > 0) 906 snd_pcm_playback_silence(substream, ULONG_MAX); 907 if (substream->timer) 908 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART, 909 &runtime->trigger_tstamp); 910 } 911 912 static struct action_ops snd_pcm_action_start = { 913 .pre_action = snd_pcm_pre_start, 914 .do_action = snd_pcm_do_start, 915 .undo_action = snd_pcm_undo_start, 916 .post_action = snd_pcm_post_start 917 }; 918 919 /** 920 * snd_pcm_start - start all linked streams 921 * @substream: the PCM substream instance 922 */ 923 int snd_pcm_start(struct snd_pcm_substream *substream) 924 { 925 return snd_pcm_action(&snd_pcm_action_start, substream, 926 SNDRV_PCM_STATE_RUNNING); 927 } 928 929 /* 930 * stop callbacks 931 */ 932 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state) 933 { 934 struct snd_pcm_runtime *runtime = substream->runtime; 935 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 936 return -EBADFD; 937 runtime->trigger_master = substream; 938 return 0; 939 } 940 941 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state) 942 { 943 if (substream->runtime->trigger_master == substream && 944 snd_pcm_running(substream)) 945 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP); 946 return 0; /* unconditonally stop all substreams */ 947 } 948 949 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state) 950 { 951 struct snd_pcm_runtime *runtime = substream->runtime; 952 if (runtime->status->state != state) { 953 snd_pcm_trigger_tstamp(substream); 954 if (substream->timer) 955 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP, 956 &runtime->trigger_tstamp); 957 runtime->status->state = state; 958 } 959 wake_up(&runtime->sleep); 960 wake_up(&runtime->tsleep); 961 } 962 963 static struct action_ops snd_pcm_action_stop = { 964 .pre_action = snd_pcm_pre_stop, 965 .do_action = snd_pcm_do_stop, 966 .post_action = snd_pcm_post_stop 967 }; 968 969 /** 970 * snd_pcm_stop - try to stop all running streams in the substream group 971 * @substream: the PCM substream instance 972 * @state: PCM state after stopping the stream 973 * 974 * The state of each stream is then changed to the given state unconditionally. 975 */ 976 int snd_pcm_stop(struct snd_pcm_substream *substream, int state) 977 { 978 return snd_pcm_action(&snd_pcm_action_stop, substream, state); 979 } 980 981 EXPORT_SYMBOL(snd_pcm_stop); 982 983 /** 984 * snd_pcm_drain_done - stop the DMA only when the given stream is playback 985 * @substream: the PCM substream 986 * 987 * After stopping, the state is changed to SETUP. 988 * Unlike snd_pcm_stop(), this affects only the given stream. 989 */ 990 int snd_pcm_drain_done(struct snd_pcm_substream *substream) 991 { 992 return snd_pcm_action_single(&snd_pcm_action_stop, substream, 993 SNDRV_PCM_STATE_SETUP); 994 } 995 996 /* 997 * pause callbacks 998 */ 999 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push) 1000 { 1001 struct snd_pcm_runtime *runtime = substream->runtime; 1002 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE)) 1003 return -ENOSYS; 1004 if (push) { 1005 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING) 1006 return -EBADFD; 1007 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED) 1008 return -EBADFD; 1009 runtime->trigger_master = substream; 1010 return 0; 1011 } 1012 1013 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push) 1014 { 1015 if (substream->runtime->trigger_master != substream) 1016 return 0; 1017 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by 1018 * a delta betwen the current jiffies, this gives a large enough 1019 * delta, effectively to skip the check once. 1020 */ 1021 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000; 1022 return substream->ops->trigger(substream, 1023 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH : 1024 SNDRV_PCM_TRIGGER_PAUSE_RELEASE); 1025 } 1026 1027 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push) 1028 { 1029 if (substream->runtime->trigger_master == substream) 1030 substream->ops->trigger(substream, 1031 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE : 1032 SNDRV_PCM_TRIGGER_PAUSE_PUSH); 1033 } 1034 1035 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push) 1036 { 1037 struct snd_pcm_runtime *runtime = substream->runtime; 1038 snd_pcm_trigger_tstamp(substream); 1039 if (push) { 1040 runtime->status->state = SNDRV_PCM_STATE_PAUSED; 1041 if (substream->timer) 1042 snd_timer_notify(substream->timer, 1043 SNDRV_TIMER_EVENT_MPAUSE, 1044 &runtime->trigger_tstamp); 1045 wake_up(&runtime->sleep); 1046 wake_up(&runtime->tsleep); 1047 } else { 1048 runtime->status->state = SNDRV_PCM_STATE_RUNNING; 1049 if (substream->timer) 1050 snd_timer_notify(substream->timer, 1051 SNDRV_TIMER_EVENT_MCONTINUE, 1052 &runtime->trigger_tstamp); 1053 } 1054 } 1055 1056 static struct action_ops snd_pcm_action_pause = { 1057 .pre_action = snd_pcm_pre_pause, 1058 .do_action = snd_pcm_do_pause, 1059 .undo_action = snd_pcm_undo_pause, 1060 .post_action = snd_pcm_post_pause 1061 }; 1062 1063 /* 1064 * Push/release the pause for all linked streams. 1065 */ 1066 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push) 1067 { 1068 return snd_pcm_action(&snd_pcm_action_pause, substream, push); 1069 } 1070 1071 #ifdef CONFIG_PM 1072 /* suspend */ 1073 1074 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state) 1075 { 1076 struct snd_pcm_runtime *runtime = substream->runtime; 1077 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1078 return -EBUSY; 1079 runtime->trigger_master = substream; 1080 return 0; 1081 } 1082 1083 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state) 1084 { 1085 struct snd_pcm_runtime *runtime = substream->runtime; 1086 if (runtime->trigger_master != substream) 1087 return 0; 1088 if (! snd_pcm_running(substream)) 1089 return 0; 1090 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); 1091 return 0; /* suspend unconditionally */ 1092 } 1093 1094 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state) 1095 { 1096 struct snd_pcm_runtime *runtime = substream->runtime; 1097 snd_pcm_trigger_tstamp(substream); 1098 if (substream->timer) 1099 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND, 1100 &runtime->trigger_tstamp); 1101 runtime->status->suspended_state = runtime->status->state; 1102 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED; 1103 wake_up(&runtime->sleep); 1104 wake_up(&runtime->tsleep); 1105 } 1106 1107 static struct action_ops snd_pcm_action_suspend = { 1108 .pre_action = snd_pcm_pre_suspend, 1109 .do_action = snd_pcm_do_suspend, 1110 .post_action = snd_pcm_post_suspend 1111 }; 1112 1113 /** 1114 * snd_pcm_suspend - trigger SUSPEND to all linked streams 1115 * @substream: the PCM substream 1116 * 1117 * After this call, all streams are changed to SUSPENDED state. 1118 */ 1119 int snd_pcm_suspend(struct snd_pcm_substream *substream) 1120 { 1121 int err; 1122 unsigned long flags; 1123 1124 if (! substream) 1125 return 0; 1126 1127 snd_pcm_stream_lock_irqsave(substream, flags); 1128 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0); 1129 snd_pcm_stream_unlock_irqrestore(substream, flags); 1130 return err; 1131 } 1132 1133 EXPORT_SYMBOL(snd_pcm_suspend); 1134 1135 /** 1136 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm 1137 * @pcm: the PCM instance 1138 * 1139 * After this call, all streams are changed to SUSPENDED state. 1140 */ 1141 int snd_pcm_suspend_all(struct snd_pcm *pcm) 1142 { 1143 struct snd_pcm_substream *substream; 1144 int stream, err = 0; 1145 1146 if (! pcm) 1147 return 0; 1148 1149 for (stream = 0; stream < 2; stream++) { 1150 for (substream = pcm->streams[stream].substream; 1151 substream; substream = substream->next) { 1152 /* FIXME: the open/close code should lock this as well */ 1153 if (substream->runtime == NULL) 1154 continue; 1155 err = snd_pcm_suspend(substream); 1156 if (err < 0 && err != -EBUSY) 1157 return err; 1158 } 1159 } 1160 return 0; 1161 } 1162 1163 EXPORT_SYMBOL(snd_pcm_suspend_all); 1164 1165 /* resume */ 1166 1167 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state) 1168 { 1169 struct snd_pcm_runtime *runtime = substream->runtime; 1170 if (!(runtime->info & SNDRV_PCM_INFO_RESUME)) 1171 return -ENOSYS; 1172 runtime->trigger_master = substream; 1173 return 0; 1174 } 1175 1176 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state) 1177 { 1178 struct snd_pcm_runtime *runtime = substream->runtime; 1179 if (runtime->trigger_master != substream) 1180 return 0; 1181 /* DMA not running previously? */ 1182 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING && 1183 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING || 1184 substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) 1185 return 0; 1186 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME); 1187 } 1188 1189 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state) 1190 { 1191 if (substream->runtime->trigger_master == substream && 1192 snd_pcm_running(substream)) 1193 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND); 1194 } 1195 1196 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state) 1197 { 1198 struct snd_pcm_runtime *runtime = substream->runtime; 1199 snd_pcm_trigger_tstamp(substream); 1200 if (substream->timer) 1201 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME, 1202 &runtime->trigger_tstamp); 1203 runtime->status->state = runtime->status->suspended_state; 1204 } 1205 1206 static struct action_ops snd_pcm_action_resume = { 1207 .pre_action = snd_pcm_pre_resume, 1208 .do_action = snd_pcm_do_resume, 1209 .undo_action = snd_pcm_undo_resume, 1210 .post_action = snd_pcm_post_resume 1211 }; 1212 1213 static int snd_pcm_resume(struct snd_pcm_substream *substream) 1214 { 1215 struct snd_card *card = substream->pcm->card; 1216 int res; 1217 1218 snd_power_lock(card); 1219 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) 1220 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0); 1221 snd_power_unlock(card); 1222 return res; 1223 } 1224 1225 #else 1226 1227 static int snd_pcm_resume(struct snd_pcm_substream *substream) 1228 { 1229 return -ENOSYS; 1230 } 1231 1232 #endif /* CONFIG_PM */ 1233 1234 /* 1235 * xrun ioctl 1236 * 1237 * Change the RUNNING stream(s) to XRUN state. 1238 */ 1239 static int snd_pcm_xrun(struct snd_pcm_substream *substream) 1240 { 1241 struct snd_card *card = substream->pcm->card; 1242 struct snd_pcm_runtime *runtime = substream->runtime; 1243 int result; 1244 1245 snd_power_lock(card); 1246 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1247 result = snd_power_wait(card, SNDRV_CTL_POWER_D0); 1248 if (result < 0) 1249 goto _unlock; 1250 } 1251 1252 snd_pcm_stream_lock_irq(substream); 1253 switch (runtime->status->state) { 1254 case SNDRV_PCM_STATE_XRUN: 1255 result = 0; /* already there */ 1256 break; 1257 case SNDRV_PCM_STATE_RUNNING: 1258 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); 1259 break; 1260 default: 1261 result = -EBADFD; 1262 } 1263 snd_pcm_stream_unlock_irq(substream); 1264 _unlock: 1265 snd_power_unlock(card); 1266 return result; 1267 } 1268 1269 /* 1270 * reset ioctl 1271 */ 1272 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state) 1273 { 1274 struct snd_pcm_runtime *runtime = substream->runtime; 1275 switch (runtime->status->state) { 1276 case SNDRV_PCM_STATE_RUNNING: 1277 case SNDRV_PCM_STATE_PREPARED: 1278 case SNDRV_PCM_STATE_PAUSED: 1279 case SNDRV_PCM_STATE_SUSPENDED: 1280 return 0; 1281 default: 1282 return -EBADFD; 1283 } 1284 } 1285 1286 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state) 1287 { 1288 struct snd_pcm_runtime *runtime = substream->runtime; 1289 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL); 1290 if (err < 0) 1291 return err; 1292 runtime->hw_ptr_base = 0; 1293 runtime->hw_ptr_interrupt = runtime->status->hw_ptr - 1294 runtime->status->hw_ptr % runtime->period_size; 1295 runtime->silence_start = runtime->status->hw_ptr; 1296 runtime->silence_filled = 0; 1297 return 0; 1298 } 1299 1300 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state) 1301 { 1302 struct snd_pcm_runtime *runtime = substream->runtime; 1303 runtime->control->appl_ptr = runtime->status->hw_ptr; 1304 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 1305 runtime->silence_size > 0) 1306 snd_pcm_playback_silence(substream, ULONG_MAX); 1307 } 1308 1309 static struct action_ops snd_pcm_action_reset = { 1310 .pre_action = snd_pcm_pre_reset, 1311 .do_action = snd_pcm_do_reset, 1312 .post_action = snd_pcm_post_reset 1313 }; 1314 1315 static int snd_pcm_reset(struct snd_pcm_substream *substream) 1316 { 1317 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0); 1318 } 1319 1320 /* 1321 * prepare ioctl 1322 */ 1323 /* we use the second argument for updating f_flags */ 1324 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream, 1325 int f_flags) 1326 { 1327 struct snd_pcm_runtime *runtime = substream->runtime; 1328 if (runtime->status->state == SNDRV_PCM_STATE_OPEN || 1329 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED) 1330 return -EBADFD; 1331 if (snd_pcm_running(substream)) 1332 return -EBUSY; 1333 substream->f_flags = f_flags; 1334 return 0; 1335 } 1336 1337 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state) 1338 { 1339 int err; 1340 err = substream->ops->prepare(substream); 1341 if (err < 0) 1342 return err; 1343 return snd_pcm_do_reset(substream, 0); 1344 } 1345 1346 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state) 1347 { 1348 struct snd_pcm_runtime *runtime = substream->runtime; 1349 runtime->control->appl_ptr = runtime->status->hw_ptr; 1350 runtime->status->state = SNDRV_PCM_STATE_PREPARED; 1351 } 1352 1353 static struct action_ops snd_pcm_action_prepare = { 1354 .pre_action = snd_pcm_pre_prepare, 1355 .do_action = snd_pcm_do_prepare, 1356 .post_action = snd_pcm_post_prepare 1357 }; 1358 1359 /** 1360 * snd_pcm_prepare - prepare the PCM substream to be triggerable 1361 * @substream: the PCM substream instance 1362 * @file: file to refer f_flags 1363 */ 1364 static int snd_pcm_prepare(struct snd_pcm_substream *substream, 1365 struct file *file) 1366 { 1367 int res; 1368 struct snd_card *card = substream->pcm->card; 1369 int f_flags; 1370 1371 if (file) 1372 f_flags = file->f_flags; 1373 else 1374 f_flags = substream->f_flags; 1375 1376 snd_power_lock(card); 1377 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0) 1378 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare, 1379 substream, f_flags); 1380 snd_power_unlock(card); 1381 return res; 1382 } 1383 1384 /* 1385 * drain ioctl 1386 */ 1387 1388 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state) 1389 { 1390 substream->runtime->trigger_master = substream; 1391 return 0; 1392 } 1393 1394 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state) 1395 { 1396 struct snd_pcm_runtime *runtime = substream->runtime; 1397 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 1398 switch (runtime->status->state) { 1399 case SNDRV_PCM_STATE_PREPARED: 1400 /* start playback stream if possible */ 1401 if (! snd_pcm_playback_empty(substream)) { 1402 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING); 1403 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING); 1404 } 1405 break; 1406 case SNDRV_PCM_STATE_RUNNING: 1407 runtime->status->state = SNDRV_PCM_STATE_DRAINING; 1408 break; 1409 default: 1410 break; 1411 } 1412 } else { 1413 /* stop running stream */ 1414 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) { 1415 int new_state = snd_pcm_capture_avail(runtime) > 0 ? 1416 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP; 1417 snd_pcm_do_stop(substream, new_state); 1418 snd_pcm_post_stop(substream, new_state); 1419 } 1420 } 1421 return 0; 1422 } 1423 1424 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state) 1425 { 1426 } 1427 1428 static struct action_ops snd_pcm_action_drain_init = { 1429 .pre_action = snd_pcm_pre_drain_init, 1430 .do_action = snd_pcm_do_drain_init, 1431 .post_action = snd_pcm_post_drain_init 1432 }; 1433 1434 static int snd_pcm_drop(struct snd_pcm_substream *substream); 1435 1436 /* 1437 * Drain the stream(s). 1438 * When the substream is linked, sync until the draining of all playback streams 1439 * is finished. 1440 * After this call, all streams are supposed to be either SETUP or DRAINING 1441 * (capture only) state. 1442 */ 1443 static int snd_pcm_drain(struct snd_pcm_substream *substream, 1444 struct file *file) 1445 { 1446 struct snd_card *card; 1447 struct snd_pcm_runtime *runtime; 1448 struct snd_pcm_substream *s; 1449 wait_queue_t wait; 1450 int result = 0; 1451 int nonblock = 0; 1452 1453 card = substream->pcm->card; 1454 runtime = substream->runtime; 1455 1456 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 1457 return -EBADFD; 1458 1459 snd_power_lock(card); 1460 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1461 result = snd_power_wait(card, SNDRV_CTL_POWER_D0); 1462 if (result < 0) { 1463 snd_power_unlock(card); 1464 return result; 1465 } 1466 } 1467 1468 if (file) { 1469 if (file->f_flags & O_NONBLOCK) 1470 nonblock = 1; 1471 } else if (substream->f_flags & O_NONBLOCK) 1472 nonblock = 1; 1473 1474 down_read(&snd_pcm_link_rwsem); 1475 snd_pcm_stream_lock_irq(substream); 1476 /* resume pause */ 1477 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) 1478 snd_pcm_pause(substream, 0); 1479 1480 /* pre-start/stop - all running streams are changed to DRAINING state */ 1481 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0); 1482 if (result < 0) 1483 goto unlock; 1484 /* in non-blocking, we don't wait in ioctl but let caller poll */ 1485 if (nonblock) { 1486 result = -EAGAIN; 1487 goto unlock; 1488 } 1489 1490 for (;;) { 1491 long tout; 1492 struct snd_pcm_runtime *to_check; 1493 if (signal_pending(current)) { 1494 result = -ERESTARTSYS; 1495 break; 1496 } 1497 /* find a substream to drain */ 1498 to_check = NULL; 1499 snd_pcm_group_for_each_entry(s, substream) { 1500 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK) 1501 continue; 1502 runtime = s->runtime; 1503 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 1504 to_check = runtime; 1505 break; 1506 } 1507 } 1508 if (!to_check) 1509 break; /* all drained */ 1510 init_waitqueue_entry(&wait, current); 1511 add_wait_queue(&to_check->sleep, &wait); 1512 set_current_state(TASK_INTERRUPTIBLE); 1513 snd_pcm_stream_unlock_irq(substream); 1514 up_read(&snd_pcm_link_rwsem); 1515 snd_power_unlock(card); 1516 tout = schedule_timeout(10 * HZ); 1517 snd_power_lock(card); 1518 down_read(&snd_pcm_link_rwsem); 1519 snd_pcm_stream_lock_irq(substream); 1520 remove_wait_queue(&to_check->sleep, &wait); 1521 if (tout == 0) { 1522 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1523 result = -ESTRPIPE; 1524 else { 1525 snd_printd("playback drain error (DMA or IRQ trouble?)\n"); 1526 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1527 result = -EIO; 1528 } 1529 break; 1530 } 1531 } 1532 1533 unlock: 1534 snd_pcm_stream_unlock_irq(substream); 1535 up_read(&snd_pcm_link_rwsem); 1536 snd_power_unlock(card); 1537 1538 return result; 1539 } 1540 1541 /* 1542 * drop ioctl 1543 * 1544 * Immediately put all linked substreams into SETUP state. 1545 */ 1546 static int snd_pcm_drop(struct snd_pcm_substream *substream) 1547 { 1548 struct snd_pcm_runtime *runtime; 1549 struct snd_card *card; 1550 int result = 0; 1551 1552 if (PCM_RUNTIME_CHECK(substream)) 1553 return -ENXIO; 1554 runtime = substream->runtime; 1555 card = substream->pcm->card; 1556 1557 if (runtime->status->state == SNDRV_PCM_STATE_OPEN || 1558 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED || 1559 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) 1560 return -EBADFD; 1561 1562 snd_pcm_stream_lock_irq(substream); 1563 /* resume pause */ 1564 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED) 1565 snd_pcm_pause(substream, 0); 1566 1567 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 1568 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */ 1569 snd_pcm_stream_unlock_irq(substream); 1570 1571 return result; 1572 } 1573 1574 1575 /* WARNING: Don't forget to fput back the file */ 1576 static struct file *snd_pcm_file_fd(int fd) 1577 { 1578 struct file *file; 1579 struct inode *inode; 1580 unsigned int minor; 1581 1582 file = fget(fd); 1583 if (!file) 1584 return NULL; 1585 inode = file->f_path.dentry->d_inode; 1586 if (!S_ISCHR(inode->i_mode) || 1587 imajor(inode) != snd_major) { 1588 fput(file); 1589 return NULL; 1590 } 1591 minor = iminor(inode); 1592 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) && 1593 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) { 1594 fput(file); 1595 return NULL; 1596 } 1597 return file; 1598 } 1599 1600 /* 1601 * PCM link handling 1602 */ 1603 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd) 1604 { 1605 int res = 0; 1606 struct file *file; 1607 struct snd_pcm_file *pcm_file; 1608 struct snd_pcm_substream *substream1; 1609 1610 file = snd_pcm_file_fd(fd); 1611 if (!file) 1612 return -EBADFD; 1613 pcm_file = file->private_data; 1614 substream1 = pcm_file->substream; 1615 down_write(&snd_pcm_link_rwsem); 1616 write_lock_irq(&snd_pcm_link_rwlock); 1617 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN || 1618 substream->runtime->status->state != substream1->runtime->status->state) { 1619 res = -EBADFD; 1620 goto _end; 1621 } 1622 if (snd_pcm_stream_linked(substream1)) { 1623 res = -EALREADY; 1624 goto _end; 1625 } 1626 if (!snd_pcm_stream_linked(substream)) { 1627 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC); 1628 if (substream->group == NULL) { 1629 res = -ENOMEM; 1630 goto _end; 1631 } 1632 spin_lock_init(&substream->group->lock); 1633 INIT_LIST_HEAD(&substream->group->substreams); 1634 list_add_tail(&substream->link_list, &substream->group->substreams); 1635 substream->group->count = 1; 1636 } 1637 list_add_tail(&substream1->link_list, &substream->group->substreams); 1638 substream->group->count++; 1639 substream1->group = substream->group; 1640 _end: 1641 write_unlock_irq(&snd_pcm_link_rwlock); 1642 up_write(&snd_pcm_link_rwsem); 1643 fput(file); 1644 return res; 1645 } 1646 1647 static void relink_to_local(struct snd_pcm_substream *substream) 1648 { 1649 substream->group = &substream->self_group; 1650 INIT_LIST_HEAD(&substream->self_group.substreams); 1651 list_add_tail(&substream->link_list, &substream->self_group.substreams); 1652 } 1653 1654 static int snd_pcm_unlink(struct snd_pcm_substream *substream) 1655 { 1656 struct snd_pcm_substream *s; 1657 int res = 0; 1658 1659 down_write(&snd_pcm_link_rwsem); 1660 write_lock_irq(&snd_pcm_link_rwlock); 1661 if (!snd_pcm_stream_linked(substream)) { 1662 res = -EALREADY; 1663 goto _end; 1664 } 1665 list_del(&substream->link_list); 1666 substream->group->count--; 1667 if (substream->group->count == 1) { /* detach the last stream, too */ 1668 snd_pcm_group_for_each_entry(s, substream) { 1669 relink_to_local(s); 1670 break; 1671 } 1672 kfree(substream->group); 1673 } 1674 relink_to_local(substream); 1675 _end: 1676 write_unlock_irq(&snd_pcm_link_rwlock); 1677 up_write(&snd_pcm_link_rwsem); 1678 return res; 1679 } 1680 1681 /* 1682 * hw configurator 1683 */ 1684 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params, 1685 struct snd_pcm_hw_rule *rule) 1686 { 1687 struct snd_interval t; 1688 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]), 1689 hw_param_interval_c(params, rule->deps[1]), &t); 1690 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1691 } 1692 1693 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params, 1694 struct snd_pcm_hw_rule *rule) 1695 { 1696 struct snd_interval t; 1697 snd_interval_div(hw_param_interval_c(params, rule->deps[0]), 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_muldivk(struct snd_pcm_hw_params *params, 1703 struct snd_pcm_hw_rule *rule) 1704 { 1705 struct snd_interval t; 1706 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]), 1707 hw_param_interval_c(params, rule->deps[1]), 1708 (unsigned long) rule->private, &t); 1709 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1710 } 1711 1712 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params, 1713 struct snd_pcm_hw_rule *rule) 1714 { 1715 struct snd_interval t; 1716 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]), 1717 (unsigned long) rule->private, 1718 hw_param_interval_c(params, rule->deps[1]), &t); 1719 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1720 } 1721 1722 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params, 1723 struct snd_pcm_hw_rule *rule) 1724 { 1725 unsigned int k; 1726 struct snd_interval *i = hw_param_interval(params, rule->deps[0]); 1727 struct snd_mask m; 1728 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 1729 snd_mask_any(&m); 1730 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { 1731 int bits; 1732 if (! snd_mask_test(mask, k)) 1733 continue; 1734 bits = snd_pcm_format_physical_width(k); 1735 if (bits <= 0) 1736 continue; /* ignore invalid formats */ 1737 if ((unsigned)bits < i->min || (unsigned)bits > i->max) 1738 snd_mask_reset(&m, k); 1739 } 1740 return snd_mask_refine(mask, &m); 1741 } 1742 1743 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params, 1744 struct snd_pcm_hw_rule *rule) 1745 { 1746 struct snd_interval t; 1747 unsigned int k; 1748 t.min = UINT_MAX; 1749 t.max = 0; 1750 t.openmin = 0; 1751 t.openmax = 0; 1752 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) { 1753 int bits; 1754 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k)) 1755 continue; 1756 bits = snd_pcm_format_physical_width(k); 1757 if (bits <= 0) 1758 continue; /* ignore invalid formats */ 1759 if (t.min > (unsigned)bits) 1760 t.min = bits; 1761 if (t.max < (unsigned)bits) 1762 t.max = bits; 1763 } 1764 t.integer = 1; 1765 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1766 } 1767 1768 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12 1769 #error "Change this table" 1770 #endif 1771 1772 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100, 1773 48000, 64000, 88200, 96000, 176400, 192000 }; 1774 1775 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = { 1776 .count = ARRAY_SIZE(rates), 1777 .list = rates, 1778 }; 1779 1780 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params, 1781 struct snd_pcm_hw_rule *rule) 1782 { 1783 struct snd_pcm_hardware *hw = rule->private; 1784 return snd_interval_list(hw_param_interval(params, rule->var), 1785 snd_pcm_known_rates.count, 1786 snd_pcm_known_rates.list, hw->rates); 1787 } 1788 1789 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params, 1790 struct snd_pcm_hw_rule *rule) 1791 { 1792 struct snd_interval t; 1793 struct snd_pcm_substream *substream = rule->private; 1794 t.min = 0; 1795 t.max = substream->buffer_bytes_max; 1796 t.openmin = 0; 1797 t.openmax = 0; 1798 t.integer = 1; 1799 return snd_interval_refine(hw_param_interval(params, rule->var), &t); 1800 } 1801 1802 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream) 1803 { 1804 struct snd_pcm_runtime *runtime = substream->runtime; 1805 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; 1806 int k, err; 1807 1808 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) { 1809 snd_mask_any(constrs_mask(constrs, k)); 1810 } 1811 1812 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) { 1813 snd_interval_any(constrs_interval(constrs, k)); 1814 } 1815 1816 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS)); 1817 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)); 1818 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)); 1819 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)); 1820 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS)); 1821 1822 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, 1823 snd_pcm_hw_rule_format, NULL, 1824 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1825 if (err < 0) 1826 return err; 1827 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 1828 snd_pcm_hw_rule_sample_bits, NULL, 1829 SNDRV_PCM_HW_PARAM_FORMAT, 1830 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1831 if (err < 0) 1832 return err; 1833 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 1834 snd_pcm_hw_rule_div, NULL, 1835 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); 1836 if (err < 0) 1837 return err; 1838 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1839 snd_pcm_hw_rule_mul, NULL, 1840 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1); 1841 if (err < 0) 1842 return err; 1843 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1844 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1845 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 1846 if (err < 0) 1847 return err; 1848 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 1849 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1850 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1); 1851 if (err < 0) 1852 return err; 1853 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 1854 snd_pcm_hw_rule_div, NULL, 1855 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 1856 if (err < 0) 1857 return err; 1858 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1859 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1860 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1); 1861 if (err < 0) 1862 return err; 1863 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1864 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1865 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1); 1866 if (err < 0) 1867 return err; 1868 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, 1869 snd_pcm_hw_rule_div, NULL, 1870 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); 1871 if (err < 0) 1872 return err; 1873 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1874 snd_pcm_hw_rule_div, NULL, 1875 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); 1876 if (err < 0) 1877 return err; 1878 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1879 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1880 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1881 if (err < 0) 1882 return err; 1883 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 1884 snd_pcm_hw_rule_muldivk, (void*) 1000000, 1885 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); 1886 if (err < 0) 1887 return err; 1888 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1889 snd_pcm_hw_rule_mul, NULL, 1890 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1); 1891 if (err < 0) 1892 return err; 1893 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1894 snd_pcm_hw_rule_mulkdiv, (void*) 8, 1895 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1896 if (err < 0) 1897 return err; 1898 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 1899 snd_pcm_hw_rule_muldivk, (void*) 1000000, 1900 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1); 1901 if (err < 0) 1902 return err; 1903 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 1904 snd_pcm_hw_rule_muldivk, (void*) 8, 1905 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1906 if (err < 0) 1907 return err; 1908 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1909 snd_pcm_hw_rule_muldivk, (void*) 8, 1910 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1); 1911 if (err < 0) 1912 return err; 1913 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 1914 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1915 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); 1916 if (err < 0) 1917 return err; 1918 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME, 1919 snd_pcm_hw_rule_mulkdiv, (void*) 1000000, 1920 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1); 1921 if (err < 0) 1922 return err; 1923 return 0; 1924 } 1925 1926 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream) 1927 { 1928 struct snd_pcm_runtime *runtime = substream->runtime; 1929 struct snd_pcm_hardware *hw = &runtime->hw; 1930 int err; 1931 unsigned int mask = 0; 1932 1933 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) 1934 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED; 1935 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) 1936 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED; 1937 if (hw->info & SNDRV_PCM_INFO_MMAP) { 1938 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED) 1939 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; 1940 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED) 1941 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED; 1942 if (hw->info & SNDRV_PCM_INFO_COMPLEX) 1943 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX; 1944 } 1945 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask); 1946 if (err < 0) 1947 return err; 1948 1949 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats); 1950 if (err < 0) 1951 return err; 1952 1953 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD); 1954 if (err < 0) 1955 return err; 1956 1957 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, 1958 hw->channels_min, hw->channels_max); 1959 if (err < 0) 1960 return err; 1961 1962 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE, 1963 hw->rate_min, hw->rate_max); 1964 if (err < 0) 1965 return err; 1966 1967 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 1968 hw->period_bytes_min, hw->period_bytes_max); 1969 if (err < 0) 1970 return err; 1971 1972 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS, 1973 hw->periods_min, hw->periods_max); 1974 if (err < 0) 1975 return err; 1976 1977 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1978 hw->period_bytes_min, hw->buffer_bytes_max); 1979 if (err < 0) 1980 return err; 1981 1982 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 1983 snd_pcm_hw_rule_buffer_bytes_max, substream, 1984 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1); 1985 if (err < 0) 1986 return err; 1987 1988 /* FIXME: remove */ 1989 if (runtime->dma_bytes) { 1990 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes); 1991 if (err < 0) 1992 return -EINVAL; 1993 } 1994 1995 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) { 1996 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 1997 snd_pcm_hw_rule_rate, hw, 1998 SNDRV_PCM_HW_PARAM_RATE, -1); 1999 if (err < 0) 2000 return err; 2001 } 2002 2003 /* FIXME: this belong to lowlevel */ 2004 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE); 2005 2006 return 0; 2007 } 2008 2009 static void pcm_release_private(struct snd_pcm_substream *substream) 2010 { 2011 snd_pcm_unlink(substream); 2012 } 2013 2014 void snd_pcm_release_substream(struct snd_pcm_substream *substream) 2015 { 2016 substream->ref_count--; 2017 if (substream->ref_count > 0) 2018 return; 2019 2020 snd_pcm_drop(substream); 2021 if (substream->hw_opened) { 2022 if (substream->ops->hw_free != NULL) 2023 substream->ops->hw_free(substream); 2024 substream->ops->close(substream); 2025 substream->hw_opened = 0; 2026 } 2027 if (substream->pcm_release) { 2028 substream->pcm_release(substream); 2029 substream->pcm_release = NULL; 2030 } 2031 snd_pcm_detach_substream(substream); 2032 } 2033 2034 EXPORT_SYMBOL(snd_pcm_release_substream); 2035 2036 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, 2037 struct file *file, 2038 struct snd_pcm_substream **rsubstream) 2039 { 2040 struct snd_pcm_substream *substream; 2041 int err; 2042 2043 err = snd_pcm_attach_substream(pcm, stream, file, &substream); 2044 if (err < 0) 2045 return err; 2046 if (substream->ref_count > 1) { 2047 *rsubstream = substream; 2048 return 0; 2049 } 2050 2051 err = snd_pcm_hw_constraints_init(substream); 2052 if (err < 0) { 2053 snd_printd("snd_pcm_hw_constraints_init failed\n"); 2054 goto error; 2055 } 2056 2057 if ((err = substream->ops->open(substream)) < 0) 2058 goto error; 2059 2060 substream->hw_opened = 1; 2061 2062 err = snd_pcm_hw_constraints_complete(substream); 2063 if (err < 0) { 2064 snd_printd("snd_pcm_hw_constraints_complete failed\n"); 2065 goto error; 2066 } 2067 2068 *rsubstream = substream; 2069 return 0; 2070 2071 error: 2072 snd_pcm_release_substream(substream); 2073 return err; 2074 } 2075 2076 EXPORT_SYMBOL(snd_pcm_open_substream); 2077 2078 static int snd_pcm_open_file(struct file *file, 2079 struct snd_pcm *pcm, 2080 int stream, 2081 struct snd_pcm_file **rpcm_file) 2082 { 2083 struct snd_pcm_file *pcm_file; 2084 struct snd_pcm_substream *substream; 2085 struct snd_pcm_str *str; 2086 int err; 2087 2088 if (rpcm_file) 2089 *rpcm_file = NULL; 2090 2091 err = snd_pcm_open_substream(pcm, stream, file, &substream); 2092 if (err < 0) 2093 return err; 2094 2095 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL); 2096 if (pcm_file == NULL) { 2097 snd_pcm_release_substream(substream); 2098 return -ENOMEM; 2099 } 2100 pcm_file->substream = substream; 2101 if (substream->ref_count == 1) { 2102 str = substream->pstr; 2103 substream->file = pcm_file; 2104 substream->pcm_release = pcm_release_private; 2105 } 2106 file->private_data = pcm_file; 2107 if (rpcm_file) 2108 *rpcm_file = pcm_file; 2109 return 0; 2110 } 2111 2112 static int snd_pcm_playback_open(struct inode *inode, struct file *file) 2113 { 2114 struct snd_pcm *pcm; 2115 int err = nonseekable_open(inode, file); 2116 if (err < 0) 2117 return err; 2118 pcm = snd_lookup_minor_data(iminor(inode), 2119 SNDRV_DEVICE_TYPE_PCM_PLAYBACK); 2120 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK); 2121 } 2122 2123 static int snd_pcm_capture_open(struct inode *inode, struct file *file) 2124 { 2125 struct snd_pcm *pcm; 2126 int err = nonseekable_open(inode, file); 2127 if (err < 0) 2128 return err; 2129 pcm = snd_lookup_minor_data(iminor(inode), 2130 SNDRV_DEVICE_TYPE_PCM_CAPTURE); 2131 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE); 2132 } 2133 2134 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream) 2135 { 2136 int err; 2137 struct snd_pcm_file *pcm_file; 2138 wait_queue_t wait; 2139 2140 if (pcm == NULL) { 2141 err = -ENODEV; 2142 goto __error1; 2143 } 2144 err = snd_card_file_add(pcm->card, file); 2145 if (err < 0) 2146 goto __error1; 2147 if (!try_module_get(pcm->card->module)) { 2148 err = -EFAULT; 2149 goto __error2; 2150 } 2151 init_waitqueue_entry(&wait, current); 2152 add_wait_queue(&pcm->open_wait, &wait); 2153 mutex_lock(&pcm->open_mutex); 2154 while (1) { 2155 err = snd_pcm_open_file(file, pcm, stream, &pcm_file); 2156 if (err >= 0) 2157 break; 2158 if (err == -EAGAIN) { 2159 if (file->f_flags & O_NONBLOCK) { 2160 err = -EBUSY; 2161 break; 2162 } 2163 } else 2164 break; 2165 set_current_state(TASK_INTERRUPTIBLE); 2166 mutex_unlock(&pcm->open_mutex); 2167 schedule(); 2168 mutex_lock(&pcm->open_mutex); 2169 if (signal_pending(current)) { 2170 err = -ERESTARTSYS; 2171 break; 2172 } 2173 } 2174 remove_wait_queue(&pcm->open_wait, &wait); 2175 mutex_unlock(&pcm->open_mutex); 2176 if (err < 0) 2177 goto __error; 2178 return err; 2179 2180 __error: 2181 module_put(pcm->card->module); 2182 __error2: 2183 snd_card_file_remove(pcm->card, file); 2184 __error1: 2185 return err; 2186 } 2187 2188 static int snd_pcm_release(struct inode *inode, struct file *file) 2189 { 2190 struct snd_pcm *pcm; 2191 struct snd_pcm_substream *substream; 2192 struct snd_pcm_file *pcm_file; 2193 2194 pcm_file = file->private_data; 2195 substream = pcm_file->substream; 2196 if (snd_BUG_ON(!substream)) 2197 return -ENXIO; 2198 pcm = substream->pcm; 2199 mutex_lock(&pcm->open_mutex); 2200 snd_pcm_release_substream(substream); 2201 kfree(pcm_file); 2202 mutex_unlock(&pcm->open_mutex); 2203 wake_up(&pcm->open_wait); 2204 module_put(pcm->card->module); 2205 snd_card_file_remove(pcm->card, file); 2206 return 0; 2207 } 2208 2209 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream, 2210 snd_pcm_uframes_t frames) 2211 { 2212 struct snd_pcm_runtime *runtime = substream->runtime; 2213 snd_pcm_sframes_t appl_ptr; 2214 snd_pcm_sframes_t ret; 2215 snd_pcm_sframes_t hw_avail; 2216 2217 if (frames == 0) 2218 return 0; 2219 2220 snd_pcm_stream_lock_irq(substream); 2221 switch (runtime->status->state) { 2222 case SNDRV_PCM_STATE_PREPARED: 2223 break; 2224 case SNDRV_PCM_STATE_DRAINING: 2225 case SNDRV_PCM_STATE_RUNNING: 2226 if (snd_pcm_update_hw_ptr(substream) >= 0) 2227 break; 2228 /* Fall through */ 2229 case SNDRV_PCM_STATE_XRUN: 2230 ret = -EPIPE; 2231 goto __end; 2232 case SNDRV_PCM_STATE_SUSPENDED: 2233 ret = -ESTRPIPE; 2234 goto __end; 2235 default: 2236 ret = -EBADFD; 2237 goto __end; 2238 } 2239 2240 hw_avail = snd_pcm_playback_hw_avail(runtime); 2241 if (hw_avail <= 0) { 2242 ret = 0; 2243 goto __end; 2244 } 2245 if (frames > (snd_pcm_uframes_t)hw_avail) 2246 frames = hw_avail; 2247 appl_ptr = runtime->control->appl_ptr - frames; 2248 if (appl_ptr < 0) 2249 appl_ptr += runtime->boundary; 2250 runtime->control->appl_ptr = appl_ptr; 2251 ret = frames; 2252 __end: 2253 snd_pcm_stream_unlock_irq(substream); 2254 return ret; 2255 } 2256 2257 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream, 2258 snd_pcm_uframes_t frames) 2259 { 2260 struct snd_pcm_runtime *runtime = substream->runtime; 2261 snd_pcm_sframes_t appl_ptr; 2262 snd_pcm_sframes_t ret; 2263 snd_pcm_sframes_t hw_avail; 2264 2265 if (frames == 0) 2266 return 0; 2267 2268 snd_pcm_stream_lock_irq(substream); 2269 switch (runtime->status->state) { 2270 case SNDRV_PCM_STATE_PREPARED: 2271 case SNDRV_PCM_STATE_DRAINING: 2272 break; 2273 case SNDRV_PCM_STATE_RUNNING: 2274 if (snd_pcm_update_hw_ptr(substream) >= 0) 2275 break; 2276 /* Fall through */ 2277 case SNDRV_PCM_STATE_XRUN: 2278 ret = -EPIPE; 2279 goto __end; 2280 case SNDRV_PCM_STATE_SUSPENDED: 2281 ret = -ESTRPIPE; 2282 goto __end; 2283 default: 2284 ret = -EBADFD; 2285 goto __end; 2286 } 2287 2288 hw_avail = snd_pcm_capture_hw_avail(runtime); 2289 if (hw_avail <= 0) { 2290 ret = 0; 2291 goto __end; 2292 } 2293 if (frames > (snd_pcm_uframes_t)hw_avail) 2294 frames = hw_avail; 2295 appl_ptr = runtime->control->appl_ptr - frames; 2296 if (appl_ptr < 0) 2297 appl_ptr += runtime->boundary; 2298 runtime->control->appl_ptr = appl_ptr; 2299 ret = frames; 2300 __end: 2301 snd_pcm_stream_unlock_irq(substream); 2302 return ret; 2303 } 2304 2305 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream, 2306 snd_pcm_uframes_t frames) 2307 { 2308 struct snd_pcm_runtime *runtime = substream->runtime; 2309 snd_pcm_sframes_t appl_ptr; 2310 snd_pcm_sframes_t ret; 2311 snd_pcm_sframes_t avail; 2312 2313 if (frames == 0) 2314 return 0; 2315 2316 snd_pcm_stream_lock_irq(substream); 2317 switch (runtime->status->state) { 2318 case SNDRV_PCM_STATE_PREPARED: 2319 case SNDRV_PCM_STATE_PAUSED: 2320 break; 2321 case SNDRV_PCM_STATE_DRAINING: 2322 case SNDRV_PCM_STATE_RUNNING: 2323 if (snd_pcm_update_hw_ptr(substream) >= 0) 2324 break; 2325 /* Fall through */ 2326 case SNDRV_PCM_STATE_XRUN: 2327 ret = -EPIPE; 2328 goto __end; 2329 case SNDRV_PCM_STATE_SUSPENDED: 2330 ret = -ESTRPIPE; 2331 goto __end; 2332 default: 2333 ret = -EBADFD; 2334 goto __end; 2335 } 2336 2337 avail = snd_pcm_playback_avail(runtime); 2338 if (avail <= 0) { 2339 ret = 0; 2340 goto __end; 2341 } 2342 if (frames > (snd_pcm_uframes_t)avail) 2343 frames = avail; 2344 appl_ptr = runtime->control->appl_ptr + frames; 2345 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) 2346 appl_ptr -= runtime->boundary; 2347 runtime->control->appl_ptr = appl_ptr; 2348 ret = frames; 2349 __end: 2350 snd_pcm_stream_unlock_irq(substream); 2351 return ret; 2352 } 2353 2354 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream, 2355 snd_pcm_uframes_t frames) 2356 { 2357 struct snd_pcm_runtime *runtime = substream->runtime; 2358 snd_pcm_sframes_t appl_ptr; 2359 snd_pcm_sframes_t ret; 2360 snd_pcm_sframes_t avail; 2361 2362 if (frames == 0) 2363 return 0; 2364 2365 snd_pcm_stream_lock_irq(substream); 2366 switch (runtime->status->state) { 2367 case SNDRV_PCM_STATE_PREPARED: 2368 case SNDRV_PCM_STATE_DRAINING: 2369 case SNDRV_PCM_STATE_PAUSED: 2370 break; 2371 case SNDRV_PCM_STATE_RUNNING: 2372 if (snd_pcm_update_hw_ptr(substream) >= 0) 2373 break; 2374 /* Fall through */ 2375 case SNDRV_PCM_STATE_XRUN: 2376 ret = -EPIPE; 2377 goto __end; 2378 case SNDRV_PCM_STATE_SUSPENDED: 2379 ret = -ESTRPIPE; 2380 goto __end; 2381 default: 2382 ret = -EBADFD; 2383 goto __end; 2384 } 2385 2386 avail = snd_pcm_capture_avail(runtime); 2387 if (avail <= 0) { 2388 ret = 0; 2389 goto __end; 2390 } 2391 if (frames > (snd_pcm_uframes_t)avail) 2392 frames = avail; 2393 appl_ptr = runtime->control->appl_ptr + frames; 2394 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary) 2395 appl_ptr -= runtime->boundary; 2396 runtime->control->appl_ptr = appl_ptr; 2397 ret = frames; 2398 __end: 2399 snd_pcm_stream_unlock_irq(substream); 2400 return ret; 2401 } 2402 2403 static int snd_pcm_hwsync(struct snd_pcm_substream *substream) 2404 { 2405 struct snd_pcm_runtime *runtime = substream->runtime; 2406 int err; 2407 2408 snd_pcm_stream_lock_irq(substream); 2409 switch (runtime->status->state) { 2410 case SNDRV_PCM_STATE_DRAINING: 2411 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 2412 goto __badfd; 2413 case SNDRV_PCM_STATE_RUNNING: 2414 if ((err = snd_pcm_update_hw_ptr(substream)) < 0) 2415 break; 2416 /* Fall through */ 2417 case SNDRV_PCM_STATE_PREPARED: 2418 case SNDRV_PCM_STATE_SUSPENDED: 2419 err = 0; 2420 break; 2421 case SNDRV_PCM_STATE_XRUN: 2422 err = -EPIPE; 2423 break; 2424 default: 2425 __badfd: 2426 err = -EBADFD; 2427 break; 2428 } 2429 snd_pcm_stream_unlock_irq(substream); 2430 return err; 2431 } 2432 2433 static int snd_pcm_delay(struct snd_pcm_substream *substream, 2434 snd_pcm_sframes_t __user *res) 2435 { 2436 struct snd_pcm_runtime *runtime = substream->runtime; 2437 int err; 2438 snd_pcm_sframes_t n = 0; 2439 2440 snd_pcm_stream_lock_irq(substream); 2441 switch (runtime->status->state) { 2442 case SNDRV_PCM_STATE_DRAINING: 2443 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) 2444 goto __badfd; 2445 case SNDRV_PCM_STATE_RUNNING: 2446 if ((err = snd_pcm_update_hw_ptr(substream)) < 0) 2447 break; 2448 /* Fall through */ 2449 case SNDRV_PCM_STATE_PREPARED: 2450 case SNDRV_PCM_STATE_SUSPENDED: 2451 err = 0; 2452 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2453 n = snd_pcm_playback_hw_avail(runtime); 2454 else 2455 n = snd_pcm_capture_avail(runtime); 2456 n += runtime->delay; 2457 break; 2458 case SNDRV_PCM_STATE_XRUN: 2459 err = -EPIPE; 2460 break; 2461 default: 2462 __badfd: 2463 err = -EBADFD; 2464 break; 2465 } 2466 snd_pcm_stream_unlock_irq(substream); 2467 if (!err) 2468 if (put_user(n, res)) 2469 err = -EFAULT; 2470 return err; 2471 } 2472 2473 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream, 2474 struct snd_pcm_sync_ptr __user *_sync_ptr) 2475 { 2476 struct snd_pcm_runtime *runtime = substream->runtime; 2477 struct snd_pcm_sync_ptr sync_ptr; 2478 volatile struct snd_pcm_mmap_status *status; 2479 volatile struct snd_pcm_mmap_control *control; 2480 int err; 2481 2482 memset(&sync_ptr, 0, sizeof(sync_ptr)); 2483 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags))) 2484 return -EFAULT; 2485 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control))) 2486 return -EFAULT; 2487 status = runtime->status; 2488 control = runtime->control; 2489 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) { 2490 err = snd_pcm_hwsync(substream); 2491 if (err < 0) 2492 return err; 2493 } 2494 snd_pcm_stream_lock_irq(substream); 2495 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL)) 2496 control->appl_ptr = sync_ptr.c.control.appl_ptr; 2497 else 2498 sync_ptr.c.control.appl_ptr = control->appl_ptr; 2499 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN)) 2500 control->avail_min = sync_ptr.c.control.avail_min; 2501 else 2502 sync_ptr.c.control.avail_min = control->avail_min; 2503 sync_ptr.s.status.state = status->state; 2504 sync_ptr.s.status.hw_ptr = status->hw_ptr; 2505 sync_ptr.s.status.tstamp = status->tstamp; 2506 sync_ptr.s.status.suspended_state = status->suspended_state; 2507 snd_pcm_stream_unlock_irq(substream); 2508 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr))) 2509 return -EFAULT; 2510 return 0; 2511 } 2512 2513 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg) 2514 { 2515 struct snd_pcm_runtime *runtime = substream->runtime; 2516 int arg; 2517 2518 if (get_user(arg, _arg)) 2519 return -EFAULT; 2520 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST) 2521 return -EINVAL; 2522 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY; 2523 if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC) 2524 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC; 2525 return 0; 2526 } 2527 2528 static int snd_pcm_common_ioctl1(struct file *file, 2529 struct snd_pcm_substream *substream, 2530 unsigned int cmd, void __user *arg) 2531 { 2532 switch (cmd) { 2533 case SNDRV_PCM_IOCTL_PVERSION: 2534 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0; 2535 case SNDRV_PCM_IOCTL_INFO: 2536 return snd_pcm_info_user(substream, arg); 2537 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */ 2538 return 0; 2539 case SNDRV_PCM_IOCTL_TTSTAMP: 2540 return snd_pcm_tstamp(substream, arg); 2541 case SNDRV_PCM_IOCTL_HW_REFINE: 2542 return snd_pcm_hw_refine_user(substream, arg); 2543 case SNDRV_PCM_IOCTL_HW_PARAMS: 2544 return snd_pcm_hw_params_user(substream, arg); 2545 case SNDRV_PCM_IOCTL_HW_FREE: 2546 return snd_pcm_hw_free(substream); 2547 case SNDRV_PCM_IOCTL_SW_PARAMS: 2548 return snd_pcm_sw_params_user(substream, arg); 2549 case SNDRV_PCM_IOCTL_STATUS: 2550 return snd_pcm_status_user(substream, arg); 2551 case SNDRV_PCM_IOCTL_CHANNEL_INFO: 2552 return snd_pcm_channel_info_user(substream, arg); 2553 case SNDRV_PCM_IOCTL_PREPARE: 2554 return snd_pcm_prepare(substream, file); 2555 case SNDRV_PCM_IOCTL_RESET: 2556 return snd_pcm_reset(substream); 2557 case SNDRV_PCM_IOCTL_START: 2558 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING); 2559 case SNDRV_PCM_IOCTL_LINK: 2560 return snd_pcm_link(substream, (int)(unsigned long) arg); 2561 case SNDRV_PCM_IOCTL_UNLINK: 2562 return snd_pcm_unlink(substream); 2563 case SNDRV_PCM_IOCTL_RESUME: 2564 return snd_pcm_resume(substream); 2565 case SNDRV_PCM_IOCTL_XRUN: 2566 return snd_pcm_xrun(substream); 2567 case SNDRV_PCM_IOCTL_HWSYNC: 2568 return snd_pcm_hwsync(substream); 2569 case SNDRV_PCM_IOCTL_DELAY: 2570 return snd_pcm_delay(substream, arg); 2571 case SNDRV_PCM_IOCTL_SYNC_PTR: 2572 return snd_pcm_sync_ptr(substream, arg); 2573 #ifdef CONFIG_SND_SUPPORT_OLD_API 2574 case SNDRV_PCM_IOCTL_HW_REFINE_OLD: 2575 return snd_pcm_hw_refine_old_user(substream, arg); 2576 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD: 2577 return snd_pcm_hw_params_old_user(substream, arg); 2578 #endif 2579 case SNDRV_PCM_IOCTL_DRAIN: 2580 return snd_pcm_drain(substream, file); 2581 case SNDRV_PCM_IOCTL_DROP: 2582 return snd_pcm_drop(substream); 2583 case SNDRV_PCM_IOCTL_PAUSE: 2584 { 2585 int res; 2586 snd_pcm_stream_lock_irq(substream); 2587 res = snd_pcm_pause(substream, (int)(unsigned long)arg); 2588 snd_pcm_stream_unlock_irq(substream); 2589 return res; 2590 } 2591 } 2592 snd_printd("unknown ioctl = 0x%x\n", cmd); 2593 return -ENOTTY; 2594 } 2595 2596 static int snd_pcm_playback_ioctl1(struct file *file, 2597 struct snd_pcm_substream *substream, 2598 unsigned int cmd, void __user *arg) 2599 { 2600 if (snd_BUG_ON(!substream)) 2601 return -ENXIO; 2602 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK)) 2603 return -EINVAL; 2604 switch (cmd) { 2605 case SNDRV_PCM_IOCTL_WRITEI_FRAMES: 2606 { 2607 struct snd_xferi xferi; 2608 struct snd_xferi __user *_xferi = arg; 2609 struct snd_pcm_runtime *runtime = substream->runtime; 2610 snd_pcm_sframes_t result; 2611 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2612 return -EBADFD; 2613 if (put_user(0, &_xferi->result)) 2614 return -EFAULT; 2615 if (copy_from_user(&xferi, _xferi, sizeof(xferi))) 2616 return -EFAULT; 2617 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames); 2618 __put_user(result, &_xferi->result); 2619 return result < 0 ? result : 0; 2620 } 2621 case SNDRV_PCM_IOCTL_WRITEN_FRAMES: 2622 { 2623 struct snd_xfern xfern; 2624 struct snd_xfern __user *_xfern = arg; 2625 struct snd_pcm_runtime *runtime = substream->runtime; 2626 void __user **bufs; 2627 snd_pcm_sframes_t result; 2628 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2629 return -EBADFD; 2630 if (runtime->channels > 128) 2631 return -EINVAL; 2632 if (put_user(0, &_xfern->result)) 2633 return -EFAULT; 2634 if (copy_from_user(&xfern, _xfern, sizeof(xfern))) 2635 return -EFAULT; 2636 2637 bufs = memdup_user(xfern.bufs, 2638 sizeof(void *) * runtime->channels); 2639 if (IS_ERR(bufs)) 2640 return PTR_ERR(bufs); 2641 result = snd_pcm_lib_writev(substream, bufs, xfern.frames); 2642 kfree(bufs); 2643 __put_user(result, &_xfern->result); 2644 return result < 0 ? result : 0; 2645 } 2646 case SNDRV_PCM_IOCTL_REWIND: 2647 { 2648 snd_pcm_uframes_t frames; 2649 snd_pcm_uframes_t __user *_frames = arg; 2650 snd_pcm_sframes_t result; 2651 if (get_user(frames, _frames)) 2652 return -EFAULT; 2653 if (put_user(0, _frames)) 2654 return -EFAULT; 2655 result = snd_pcm_playback_rewind(substream, frames); 2656 __put_user(result, _frames); 2657 return result < 0 ? result : 0; 2658 } 2659 case SNDRV_PCM_IOCTL_FORWARD: 2660 { 2661 snd_pcm_uframes_t frames; 2662 snd_pcm_uframes_t __user *_frames = arg; 2663 snd_pcm_sframes_t result; 2664 if (get_user(frames, _frames)) 2665 return -EFAULT; 2666 if (put_user(0, _frames)) 2667 return -EFAULT; 2668 result = snd_pcm_playback_forward(substream, frames); 2669 __put_user(result, _frames); 2670 return result < 0 ? result : 0; 2671 } 2672 } 2673 return snd_pcm_common_ioctl1(file, substream, cmd, arg); 2674 } 2675 2676 static int snd_pcm_capture_ioctl1(struct file *file, 2677 struct snd_pcm_substream *substream, 2678 unsigned int cmd, void __user *arg) 2679 { 2680 if (snd_BUG_ON(!substream)) 2681 return -ENXIO; 2682 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE)) 2683 return -EINVAL; 2684 switch (cmd) { 2685 case SNDRV_PCM_IOCTL_READI_FRAMES: 2686 { 2687 struct snd_xferi xferi; 2688 struct snd_xferi __user *_xferi = arg; 2689 struct snd_pcm_runtime *runtime = substream->runtime; 2690 snd_pcm_sframes_t result; 2691 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2692 return -EBADFD; 2693 if (put_user(0, &_xferi->result)) 2694 return -EFAULT; 2695 if (copy_from_user(&xferi, _xferi, sizeof(xferi))) 2696 return -EFAULT; 2697 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames); 2698 __put_user(result, &_xferi->result); 2699 return result < 0 ? result : 0; 2700 } 2701 case SNDRV_PCM_IOCTL_READN_FRAMES: 2702 { 2703 struct snd_xfern xfern; 2704 struct snd_xfern __user *_xfern = arg; 2705 struct snd_pcm_runtime *runtime = substream->runtime; 2706 void *bufs; 2707 snd_pcm_sframes_t result; 2708 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2709 return -EBADFD; 2710 if (runtime->channels > 128) 2711 return -EINVAL; 2712 if (put_user(0, &_xfern->result)) 2713 return -EFAULT; 2714 if (copy_from_user(&xfern, _xfern, sizeof(xfern))) 2715 return -EFAULT; 2716 2717 bufs = memdup_user(xfern.bufs, 2718 sizeof(void *) * runtime->channels); 2719 if (IS_ERR(bufs)) 2720 return PTR_ERR(bufs); 2721 result = snd_pcm_lib_readv(substream, bufs, xfern.frames); 2722 kfree(bufs); 2723 __put_user(result, &_xfern->result); 2724 return result < 0 ? result : 0; 2725 } 2726 case SNDRV_PCM_IOCTL_REWIND: 2727 { 2728 snd_pcm_uframes_t frames; 2729 snd_pcm_uframes_t __user *_frames = arg; 2730 snd_pcm_sframes_t result; 2731 if (get_user(frames, _frames)) 2732 return -EFAULT; 2733 if (put_user(0, _frames)) 2734 return -EFAULT; 2735 result = snd_pcm_capture_rewind(substream, frames); 2736 __put_user(result, _frames); 2737 return result < 0 ? result : 0; 2738 } 2739 case SNDRV_PCM_IOCTL_FORWARD: 2740 { 2741 snd_pcm_uframes_t frames; 2742 snd_pcm_uframes_t __user *_frames = arg; 2743 snd_pcm_sframes_t result; 2744 if (get_user(frames, _frames)) 2745 return -EFAULT; 2746 if (put_user(0, _frames)) 2747 return -EFAULT; 2748 result = snd_pcm_capture_forward(substream, frames); 2749 __put_user(result, _frames); 2750 return result < 0 ? result : 0; 2751 } 2752 } 2753 return snd_pcm_common_ioctl1(file, substream, cmd, arg); 2754 } 2755 2756 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd, 2757 unsigned long arg) 2758 { 2759 struct snd_pcm_file *pcm_file; 2760 2761 pcm_file = file->private_data; 2762 2763 if (((cmd >> 8) & 0xff) != 'A') 2764 return -ENOTTY; 2765 2766 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd, 2767 (void __user *)arg); 2768 } 2769 2770 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd, 2771 unsigned long arg) 2772 { 2773 struct snd_pcm_file *pcm_file; 2774 2775 pcm_file = file->private_data; 2776 2777 if (((cmd >> 8) & 0xff) != 'A') 2778 return -ENOTTY; 2779 2780 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd, 2781 (void __user *)arg); 2782 } 2783 2784 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, 2785 unsigned int cmd, void *arg) 2786 { 2787 mm_segment_t fs; 2788 int result; 2789 2790 fs = snd_enter_user(); 2791 switch (substream->stream) { 2792 case SNDRV_PCM_STREAM_PLAYBACK: 2793 result = snd_pcm_playback_ioctl1(NULL, substream, cmd, 2794 (void __user *)arg); 2795 break; 2796 case SNDRV_PCM_STREAM_CAPTURE: 2797 result = snd_pcm_capture_ioctl1(NULL, substream, cmd, 2798 (void __user *)arg); 2799 break; 2800 default: 2801 result = -EINVAL; 2802 break; 2803 } 2804 snd_leave_user(fs); 2805 return result; 2806 } 2807 2808 EXPORT_SYMBOL(snd_pcm_kernel_ioctl); 2809 2810 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count, 2811 loff_t * offset) 2812 { 2813 struct snd_pcm_file *pcm_file; 2814 struct snd_pcm_substream *substream; 2815 struct snd_pcm_runtime *runtime; 2816 snd_pcm_sframes_t result; 2817 2818 pcm_file = file->private_data; 2819 substream = pcm_file->substream; 2820 if (PCM_RUNTIME_CHECK(substream)) 2821 return -ENXIO; 2822 runtime = substream->runtime; 2823 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2824 return -EBADFD; 2825 if (!frame_aligned(runtime, count)) 2826 return -EINVAL; 2827 count = bytes_to_frames(runtime, count); 2828 result = snd_pcm_lib_read(substream, buf, count); 2829 if (result > 0) 2830 result = frames_to_bytes(runtime, result); 2831 return result; 2832 } 2833 2834 static ssize_t snd_pcm_write(struct file *file, const char __user *buf, 2835 size_t count, loff_t * offset) 2836 { 2837 struct snd_pcm_file *pcm_file; 2838 struct snd_pcm_substream *substream; 2839 struct snd_pcm_runtime *runtime; 2840 snd_pcm_sframes_t result; 2841 2842 pcm_file = file->private_data; 2843 substream = pcm_file->substream; 2844 if (PCM_RUNTIME_CHECK(substream)) 2845 return -ENXIO; 2846 runtime = substream->runtime; 2847 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2848 return -EBADFD; 2849 if (!frame_aligned(runtime, count)) 2850 return -EINVAL; 2851 count = bytes_to_frames(runtime, count); 2852 result = snd_pcm_lib_write(substream, buf, count); 2853 if (result > 0) 2854 result = frames_to_bytes(runtime, result); 2855 return result; 2856 } 2857 2858 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov, 2859 unsigned long nr_segs, loff_t pos) 2860 2861 { 2862 struct snd_pcm_file *pcm_file; 2863 struct snd_pcm_substream *substream; 2864 struct snd_pcm_runtime *runtime; 2865 snd_pcm_sframes_t result; 2866 unsigned long i; 2867 void __user **bufs; 2868 snd_pcm_uframes_t frames; 2869 2870 pcm_file = iocb->ki_filp->private_data; 2871 substream = pcm_file->substream; 2872 if (PCM_RUNTIME_CHECK(substream)) 2873 return -ENXIO; 2874 runtime = substream->runtime; 2875 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2876 return -EBADFD; 2877 if (nr_segs > 1024 || nr_segs != runtime->channels) 2878 return -EINVAL; 2879 if (!frame_aligned(runtime, iov->iov_len)) 2880 return -EINVAL; 2881 frames = bytes_to_samples(runtime, iov->iov_len); 2882 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL); 2883 if (bufs == NULL) 2884 return -ENOMEM; 2885 for (i = 0; i < nr_segs; ++i) 2886 bufs[i] = iov[i].iov_base; 2887 result = snd_pcm_lib_readv(substream, bufs, frames); 2888 if (result > 0) 2889 result = frames_to_bytes(runtime, result); 2890 kfree(bufs); 2891 return result; 2892 } 2893 2894 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov, 2895 unsigned long nr_segs, loff_t pos) 2896 { 2897 struct snd_pcm_file *pcm_file; 2898 struct snd_pcm_substream *substream; 2899 struct snd_pcm_runtime *runtime; 2900 snd_pcm_sframes_t result; 2901 unsigned long i; 2902 void __user **bufs; 2903 snd_pcm_uframes_t frames; 2904 2905 pcm_file = iocb->ki_filp->private_data; 2906 substream = pcm_file->substream; 2907 if (PCM_RUNTIME_CHECK(substream)) 2908 return -ENXIO; 2909 runtime = substream->runtime; 2910 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 2911 return -EBADFD; 2912 if (nr_segs > 128 || nr_segs != runtime->channels || 2913 !frame_aligned(runtime, iov->iov_len)) 2914 return -EINVAL; 2915 frames = bytes_to_samples(runtime, iov->iov_len); 2916 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL); 2917 if (bufs == NULL) 2918 return -ENOMEM; 2919 for (i = 0; i < nr_segs; ++i) 2920 bufs[i] = iov[i].iov_base; 2921 result = snd_pcm_lib_writev(substream, bufs, frames); 2922 if (result > 0) 2923 result = frames_to_bytes(runtime, result); 2924 kfree(bufs); 2925 return result; 2926 } 2927 2928 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait) 2929 { 2930 struct snd_pcm_file *pcm_file; 2931 struct snd_pcm_substream *substream; 2932 struct snd_pcm_runtime *runtime; 2933 unsigned int mask; 2934 snd_pcm_uframes_t avail; 2935 2936 pcm_file = file->private_data; 2937 2938 substream = pcm_file->substream; 2939 if (PCM_RUNTIME_CHECK(substream)) 2940 return -ENXIO; 2941 runtime = substream->runtime; 2942 2943 poll_wait(file, &runtime->sleep, wait); 2944 2945 snd_pcm_stream_lock_irq(substream); 2946 avail = snd_pcm_playback_avail(runtime); 2947 switch (runtime->status->state) { 2948 case SNDRV_PCM_STATE_RUNNING: 2949 case SNDRV_PCM_STATE_PREPARED: 2950 case SNDRV_PCM_STATE_PAUSED: 2951 if (avail >= runtime->control->avail_min) { 2952 mask = POLLOUT | POLLWRNORM; 2953 break; 2954 } 2955 /* Fall through */ 2956 case SNDRV_PCM_STATE_DRAINING: 2957 mask = 0; 2958 break; 2959 default: 2960 mask = POLLOUT | POLLWRNORM | POLLERR; 2961 break; 2962 } 2963 snd_pcm_stream_unlock_irq(substream); 2964 return mask; 2965 } 2966 2967 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait) 2968 { 2969 struct snd_pcm_file *pcm_file; 2970 struct snd_pcm_substream *substream; 2971 struct snd_pcm_runtime *runtime; 2972 unsigned int mask; 2973 snd_pcm_uframes_t avail; 2974 2975 pcm_file = file->private_data; 2976 2977 substream = pcm_file->substream; 2978 if (PCM_RUNTIME_CHECK(substream)) 2979 return -ENXIO; 2980 runtime = substream->runtime; 2981 2982 poll_wait(file, &runtime->sleep, wait); 2983 2984 snd_pcm_stream_lock_irq(substream); 2985 avail = snd_pcm_capture_avail(runtime); 2986 switch (runtime->status->state) { 2987 case SNDRV_PCM_STATE_RUNNING: 2988 case SNDRV_PCM_STATE_PREPARED: 2989 case SNDRV_PCM_STATE_PAUSED: 2990 if (avail >= runtime->control->avail_min) { 2991 mask = POLLIN | POLLRDNORM; 2992 break; 2993 } 2994 mask = 0; 2995 break; 2996 case SNDRV_PCM_STATE_DRAINING: 2997 if (avail > 0) { 2998 mask = POLLIN | POLLRDNORM; 2999 break; 3000 } 3001 /* Fall through */ 3002 default: 3003 mask = POLLIN | POLLRDNORM | POLLERR; 3004 break; 3005 } 3006 snd_pcm_stream_unlock_irq(substream); 3007 return mask; 3008 } 3009 3010 /* 3011 * mmap support 3012 */ 3013 3014 /* 3015 * Only on coherent architectures, we can mmap the status and the control records 3016 * for effcient data transfer. On others, we have to use HWSYNC ioctl... 3017 */ 3018 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) 3019 /* 3020 * mmap status record 3021 */ 3022 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area, 3023 struct vm_fault *vmf) 3024 { 3025 struct snd_pcm_substream *substream = area->vm_private_data; 3026 struct snd_pcm_runtime *runtime; 3027 3028 if (substream == NULL) 3029 return VM_FAULT_SIGBUS; 3030 runtime = substream->runtime; 3031 vmf->page = virt_to_page(runtime->status); 3032 get_page(vmf->page); 3033 return 0; 3034 } 3035 3036 static const struct vm_operations_struct snd_pcm_vm_ops_status = 3037 { 3038 .fault = snd_pcm_mmap_status_fault, 3039 }; 3040 3041 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, 3042 struct vm_area_struct *area) 3043 { 3044 struct snd_pcm_runtime *runtime; 3045 long size; 3046 if (!(area->vm_flags & VM_READ)) 3047 return -EINVAL; 3048 runtime = substream->runtime; 3049 size = area->vm_end - area->vm_start; 3050 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))) 3051 return -EINVAL; 3052 area->vm_ops = &snd_pcm_vm_ops_status; 3053 area->vm_private_data = substream; 3054 area->vm_flags |= VM_RESERVED; 3055 return 0; 3056 } 3057 3058 /* 3059 * mmap control record 3060 */ 3061 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area, 3062 struct vm_fault *vmf) 3063 { 3064 struct snd_pcm_substream *substream = area->vm_private_data; 3065 struct snd_pcm_runtime *runtime; 3066 3067 if (substream == NULL) 3068 return VM_FAULT_SIGBUS; 3069 runtime = substream->runtime; 3070 vmf->page = virt_to_page(runtime->control); 3071 get_page(vmf->page); 3072 return 0; 3073 } 3074 3075 static const struct vm_operations_struct snd_pcm_vm_ops_control = 3076 { 3077 .fault = snd_pcm_mmap_control_fault, 3078 }; 3079 3080 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, 3081 struct vm_area_struct *area) 3082 { 3083 struct snd_pcm_runtime *runtime; 3084 long size; 3085 if (!(area->vm_flags & VM_READ)) 3086 return -EINVAL; 3087 runtime = substream->runtime; 3088 size = area->vm_end - area->vm_start; 3089 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))) 3090 return -EINVAL; 3091 area->vm_ops = &snd_pcm_vm_ops_control; 3092 area->vm_private_data = substream; 3093 area->vm_flags |= VM_RESERVED; 3094 return 0; 3095 } 3096 #else /* ! coherent mmap */ 3097 /* 3098 * don't support mmap for status and control records. 3099 */ 3100 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file, 3101 struct vm_area_struct *area) 3102 { 3103 return -ENXIO; 3104 } 3105 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file, 3106 struct vm_area_struct *area) 3107 { 3108 return -ENXIO; 3109 } 3110 #endif /* coherent mmap */ 3111 3112 static inline struct page * 3113 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs) 3114 { 3115 void *vaddr = substream->runtime->dma_area + ofs; 3116 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT) 3117 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) 3118 return virt_to_page(CAC_ADDR(vaddr)); 3119 #endif 3120 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE) 3121 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) { 3122 dma_addr_t addr = substream->runtime->dma_addr + ofs; 3123 addr -= get_dma_offset(substream->dma_buffer.dev.dev); 3124 /* assume dma_handle set via pfn_to_phys() in 3125 * mm/dma-noncoherent.c 3126 */ 3127 return pfn_to_page(addr >> PAGE_SHIFT); 3128 } 3129 #endif 3130 return virt_to_page(vaddr); 3131 } 3132 3133 /* 3134 * fault callback for mmapping a RAM page 3135 */ 3136 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area, 3137 struct vm_fault *vmf) 3138 { 3139 struct snd_pcm_substream *substream = area->vm_private_data; 3140 struct snd_pcm_runtime *runtime; 3141 unsigned long offset; 3142 struct page * page; 3143 size_t dma_bytes; 3144 3145 if (substream == NULL) 3146 return VM_FAULT_SIGBUS; 3147 runtime = substream->runtime; 3148 offset = vmf->pgoff << PAGE_SHIFT; 3149 dma_bytes = PAGE_ALIGN(runtime->dma_bytes); 3150 if (offset > dma_bytes - PAGE_SIZE) 3151 return VM_FAULT_SIGBUS; 3152 if (substream->ops->page) 3153 page = substream->ops->page(substream, offset); 3154 else 3155 page = snd_pcm_default_page_ops(substream, offset); 3156 if (!page) 3157 return VM_FAULT_SIGBUS; 3158 get_page(page); 3159 vmf->page = page; 3160 return 0; 3161 } 3162 3163 static const struct vm_operations_struct snd_pcm_vm_ops_data = { 3164 .open = snd_pcm_mmap_data_open, 3165 .close = snd_pcm_mmap_data_close, 3166 }; 3167 3168 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = { 3169 .open = snd_pcm_mmap_data_open, 3170 .close = snd_pcm_mmap_data_close, 3171 .fault = snd_pcm_mmap_data_fault, 3172 }; 3173 3174 #ifndef ARCH_HAS_DMA_MMAP_COHERENT 3175 /* This should be defined / handled globally! */ 3176 #ifdef CONFIG_ARM 3177 #define ARCH_HAS_DMA_MMAP_COHERENT 3178 #endif 3179 #endif 3180 3181 /* 3182 * mmap the DMA buffer on RAM 3183 */ 3184 static int snd_pcm_default_mmap(struct snd_pcm_substream *substream, 3185 struct vm_area_struct *area) 3186 { 3187 area->vm_flags |= VM_RESERVED; 3188 #ifdef ARCH_HAS_DMA_MMAP_COHERENT 3189 if (!substream->ops->page && 3190 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) 3191 return dma_mmap_coherent(substream->dma_buffer.dev.dev, 3192 area, 3193 substream->runtime->dma_area, 3194 substream->runtime->dma_addr, 3195 area->vm_end - area->vm_start); 3196 #elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT) 3197 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV && 3198 !plat_device_is_coherent(substream->dma_buffer.dev.dev)) 3199 area->vm_page_prot = pgprot_noncached(area->vm_page_prot); 3200 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */ 3201 /* mmap with fault handler */ 3202 area->vm_ops = &snd_pcm_vm_ops_data_fault; 3203 return 0; 3204 } 3205 3206 /* 3207 * mmap the DMA buffer on I/O memory area 3208 */ 3209 #if SNDRV_PCM_INFO_MMAP_IOMEM 3210 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, 3211 struct vm_area_struct *area) 3212 { 3213 long size; 3214 unsigned long offset; 3215 3216 area->vm_page_prot = pgprot_noncached(area->vm_page_prot); 3217 area->vm_flags |= VM_IO; 3218 size = area->vm_end - area->vm_start; 3219 offset = area->vm_pgoff << PAGE_SHIFT; 3220 if (io_remap_pfn_range(area, area->vm_start, 3221 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT, 3222 size, area->vm_page_prot)) 3223 return -EAGAIN; 3224 return 0; 3225 } 3226 3227 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem); 3228 #endif /* SNDRV_PCM_INFO_MMAP */ 3229 3230 /* mmap callback with pgprot_noncached */ 3231 int snd_pcm_lib_mmap_noncached(struct snd_pcm_substream *substream, 3232 struct vm_area_struct *area) 3233 { 3234 area->vm_page_prot = pgprot_noncached(area->vm_page_prot); 3235 return snd_pcm_default_mmap(substream, area); 3236 } 3237 EXPORT_SYMBOL(snd_pcm_lib_mmap_noncached); 3238 3239 /* 3240 * mmap DMA buffer 3241 */ 3242 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, 3243 struct vm_area_struct *area) 3244 { 3245 struct snd_pcm_runtime *runtime; 3246 long size; 3247 unsigned long offset; 3248 size_t dma_bytes; 3249 int err; 3250 3251 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 3252 if (!(area->vm_flags & (VM_WRITE|VM_READ))) 3253 return -EINVAL; 3254 } else { 3255 if (!(area->vm_flags & VM_READ)) 3256 return -EINVAL; 3257 } 3258 runtime = substream->runtime; 3259 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 3260 return -EBADFD; 3261 if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) 3262 return -ENXIO; 3263 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || 3264 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) 3265 return -EINVAL; 3266 size = area->vm_end - area->vm_start; 3267 offset = area->vm_pgoff << PAGE_SHIFT; 3268 dma_bytes = PAGE_ALIGN(runtime->dma_bytes); 3269 if ((size_t)size > dma_bytes) 3270 return -EINVAL; 3271 if (offset > dma_bytes - size) 3272 return -EINVAL; 3273 3274 area->vm_ops = &snd_pcm_vm_ops_data; 3275 area->vm_private_data = substream; 3276 if (substream->ops->mmap) 3277 err = substream->ops->mmap(substream, area); 3278 else 3279 err = snd_pcm_default_mmap(substream, area); 3280 if (!err) 3281 atomic_inc(&substream->mmap_count); 3282 return err; 3283 } 3284 3285 EXPORT_SYMBOL(snd_pcm_mmap_data); 3286 3287 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area) 3288 { 3289 struct snd_pcm_file * pcm_file; 3290 struct snd_pcm_substream *substream; 3291 unsigned long offset; 3292 3293 pcm_file = file->private_data; 3294 substream = pcm_file->substream; 3295 if (PCM_RUNTIME_CHECK(substream)) 3296 return -ENXIO; 3297 3298 offset = area->vm_pgoff << PAGE_SHIFT; 3299 switch (offset) { 3300 case SNDRV_PCM_MMAP_OFFSET_STATUS: 3301 if (pcm_file->no_compat_mmap) 3302 return -ENXIO; 3303 return snd_pcm_mmap_status(substream, file, area); 3304 case SNDRV_PCM_MMAP_OFFSET_CONTROL: 3305 if (pcm_file->no_compat_mmap) 3306 return -ENXIO; 3307 return snd_pcm_mmap_control(substream, file, area); 3308 default: 3309 return snd_pcm_mmap_data(substream, file, area); 3310 } 3311 return 0; 3312 } 3313 3314 static int snd_pcm_fasync(int fd, struct file * file, int on) 3315 { 3316 struct snd_pcm_file * pcm_file; 3317 struct snd_pcm_substream *substream; 3318 struct snd_pcm_runtime *runtime; 3319 3320 pcm_file = file->private_data; 3321 substream = pcm_file->substream; 3322 if (PCM_RUNTIME_CHECK(substream)) 3323 return -ENXIO; 3324 runtime = substream->runtime; 3325 return fasync_helper(fd, file, on, &runtime->fasync); 3326 } 3327 3328 /* 3329 * ioctl32 compat 3330 */ 3331 #ifdef CONFIG_COMPAT 3332 #include "pcm_compat.c" 3333 #else 3334 #define snd_pcm_ioctl_compat NULL 3335 #endif 3336 3337 /* 3338 * To be removed helpers to keep binary compatibility 3339 */ 3340 3341 #ifdef CONFIG_SND_SUPPORT_OLD_API 3342 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5)) 3343 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5)) 3344 3345 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params, 3346 struct snd_pcm_hw_params_old *oparams) 3347 { 3348 unsigned int i; 3349 3350 memset(params, 0, sizeof(*params)); 3351 params->flags = oparams->flags; 3352 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) 3353 params->masks[i].bits[0] = oparams->masks[i]; 3354 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals)); 3355 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask); 3356 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask); 3357 params->info = oparams->info; 3358 params->msbits = oparams->msbits; 3359 params->rate_num = oparams->rate_num; 3360 params->rate_den = oparams->rate_den; 3361 params->fifo_size = oparams->fifo_size; 3362 } 3363 3364 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams, 3365 struct snd_pcm_hw_params *params) 3366 { 3367 unsigned int i; 3368 3369 memset(oparams, 0, sizeof(*oparams)); 3370 oparams->flags = params->flags; 3371 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++) 3372 oparams->masks[i] = params->masks[i].bits[0]; 3373 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals)); 3374 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask); 3375 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask); 3376 oparams->info = params->info; 3377 oparams->msbits = params->msbits; 3378 oparams->rate_num = params->rate_num; 3379 oparams->rate_den = params->rate_den; 3380 oparams->fifo_size = params->fifo_size; 3381 } 3382 3383 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream, 3384 struct snd_pcm_hw_params_old __user * _oparams) 3385 { 3386 struct snd_pcm_hw_params *params; 3387 struct snd_pcm_hw_params_old *oparams = NULL; 3388 int err; 3389 3390 params = kmalloc(sizeof(*params), GFP_KERNEL); 3391 if (!params) 3392 return -ENOMEM; 3393 3394 oparams = memdup_user(_oparams, sizeof(*oparams)); 3395 if (IS_ERR(oparams)) { 3396 err = PTR_ERR(oparams); 3397 goto out; 3398 } 3399 snd_pcm_hw_convert_from_old_params(params, oparams); 3400 err = snd_pcm_hw_refine(substream, params); 3401 snd_pcm_hw_convert_to_old_params(oparams, params); 3402 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { 3403 if (!err) 3404 err = -EFAULT; 3405 } 3406 3407 kfree(oparams); 3408 out: 3409 kfree(params); 3410 return err; 3411 } 3412 3413 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream, 3414 struct snd_pcm_hw_params_old __user * _oparams) 3415 { 3416 struct snd_pcm_hw_params *params; 3417 struct snd_pcm_hw_params_old *oparams = NULL; 3418 int err; 3419 3420 params = kmalloc(sizeof(*params), GFP_KERNEL); 3421 if (!params) 3422 return -ENOMEM; 3423 3424 oparams = memdup_user(_oparams, sizeof(*oparams)); 3425 if (IS_ERR(oparams)) { 3426 err = PTR_ERR(oparams); 3427 goto out; 3428 } 3429 snd_pcm_hw_convert_from_old_params(params, oparams); 3430 err = snd_pcm_hw_params(substream, params); 3431 snd_pcm_hw_convert_to_old_params(oparams, params); 3432 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) { 3433 if (!err) 3434 err = -EFAULT; 3435 } 3436 3437 kfree(oparams); 3438 out: 3439 kfree(params); 3440 return err; 3441 } 3442 #endif /* CONFIG_SND_SUPPORT_OLD_API */ 3443 3444 #ifndef CONFIG_MMU 3445 static unsigned long snd_pcm_get_unmapped_area(struct file *file, 3446 unsigned long addr, 3447 unsigned long len, 3448 unsigned long pgoff, 3449 unsigned long flags) 3450 { 3451 struct snd_pcm_file *pcm_file = file->private_data; 3452 struct snd_pcm_substream *substream = pcm_file->substream; 3453 struct snd_pcm_runtime *runtime = substream->runtime; 3454 unsigned long offset = pgoff << PAGE_SHIFT; 3455 3456 switch (offset) { 3457 case SNDRV_PCM_MMAP_OFFSET_STATUS: 3458 return (unsigned long)runtime->status; 3459 case SNDRV_PCM_MMAP_OFFSET_CONTROL: 3460 return (unsigned long)runtime->control; 3461 default: 3462 return (unsigned long)runtime->dma_area + offset; 3463 } 3464 } 3465 #else 3466 # define snd_pcm_get_unmapped_area NULL 3467 #endif 3468 3469 /* 3470 * Register section 3471 */ 3472 3473 const struct file_operations snd_pcm_f_ops[2] = { 3474 { 3475 .owner = THIS_MODULE, 3476 .write = snd_pcm_write, 3477 .aio_write = snd_pcm_aio_write, 3478 .open = snd_pcm_playback_open, 3479 .release = snd_pcm_release, 3480 .llseek = no_llseek, 3481 .poll = snd_pcm_playback_poll, 3482 .unlocked_ioctl = snd_pcm_playback_ioctl, 3483 .compat_ioctl = snd_pcm_ioctl_compat, 3484 .mmap = snd_pcm_mmap, 3485 .fasync = snd_pcm_fasync, 3486 .get_unmapped_area = snd_pcm_get_unmapped_area, 3487 }, 3488 { 3489 .owner = THIS_MODULE, 3490 .read = snd_pcm_read, 3491 .aio_read = snd_pcm_aio_read, 3492 .open = snd_pcm_capture_open, 3493 .release = snd_pcm_release, 3494 .llseek = no_llseek, 3495 .poll = snd_pcm_capture_poll, 3496 .unlocked_ioctl = snd_pcm_capture_ioctl, 3497 .compat_ioctl = snd_pcm_ioctl_compat, 3498 .mmap = snd_pcm_mmap, 3499 .fasync = snd_pcm_fasync, 3500 .get_unmapped_area = snd_pcm_get_unmapped_area, 3501 } 3502 }; 3503