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