sound/core/pcm_native.c

   1 /*
   2  *  Digital Audio (PCM) abstract layer
   3  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
   4  *
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation; either version 2 of the License, or
   9  *   (at your option) any later version.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program; if not, write to the Free Software
  18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  19  *
  20  */
  21
  22 #include <linux/mm.h>
  23 #include <linux/module.h>
  24 #include <linux/file.h>
  25 #include <linux/slab.h>
  26 #include <linux/time.h>
  27 #include <linux/pm_qos.h>
  28 #include <linux/aio.h>
  29 #include <linux/dma-mapping.h>
  30 #include <sound/core.h>
  31 #include <sound/control.h>
  32 #include <sound/info.h>
  33 #include <sound/pcm.h>
  34 #include <sound/pcm_params.h>
  35 #include <sound/timer.h>
  36 #include <sound/minors.h>
  37 #include <asm/io.h>
  38
  39 /*
  40  *  Compatibility
  41  */
  42
  43 struct snd_pcm_hw_params_old {
  44         unsigned int flags;
  45         unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
  46                            SNDRV_PCM_HW_PARAM_ACCESS + 1];
  47         struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
  48                                         SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
  49         unsigned int rmask;
  50         unsigned int cmask;
  51         unsigned int info;
  52         unsigned int msbits;
  53         unsigned int rate_num;
  54         unsigned int rate_den;
  55         snd_pcm_uframes_t fifo_size;
  56         unsigned char reserved[64];
  57 };
  58
  59 #ifdef CONFIG_SND_SUPPORT_OLD_API
  60 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
  61 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
  62
  63 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
  64                                       struct snd_pcm_hw_params_old __user * _oparams);
  65 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
  66                                       struct snd_pcm_hw_params_old __user * _oparams);
  67 #endif
  68 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
  69
  70 /*
  71  *
  72  */
  73
  74 static DEFINE_RWLOCK(snd_pcm_link_rwlock);
  75 static DECLARE_RWSEM(snd_pcm_link_rwsem);
  76
  77 void snd_pcm_stream_lock(struct snd_pcm_substream *substream)
  78 {
  79         if (substream->pcm->nonatomic) {
  80                 down_read(&snd_pcm_link_rwsem);
  81                 mutex_lock(&substream->self_group.mutex);
  82         } else {
  83                 read_lock(&snd_pcm_link_rwlock);
  84                 spin_lock(&substream->self_group.lock);
  85         }
  86 }
  87 EXPORT_SYMBOL_GPL(snd_pcm_stream_lock);
  88
  89 void snd_pcm_stream_unlock(struct snd_pcm_substream *substream)
  90 {
  91         if (substream->pcm->nonatomic) {
  92                 mutex_unlock(&substream->self_group.mutex);
  93                 up_read(&snd_pcm_link_rwsem);
  94         } else {
  95                 spin_unlock(&substream->self_group.lock);
  96                 read_unlock(&snd_pcm_link_rwlock);
  97         }
  98 }
  99 EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock);
 100
 101 void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream)
 102 {
 103         if (!substream->pcm->nonatomic)
 104                 local_irq_disable();
 105         snd_pcm_stream_lock(substream);
 106 }
 107 EXPORT_SYMBOL_GPL(snd_pcm_stream_lock_irq);
 108
 109 void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream)
 110 {
 111         snd_pcm_stream_unlock(substream);
 112         if (!substream->pcm->nonatomic)
 113                 local_irq_enable();
 114 }
 115 EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irq);
 116
 117 unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream)
 118 {
 119         unsigned long flags = 0;
 120         if (!substream->pcm->nonatomic)
 121                 local_irq_save(flags);
 122         snd_pcm_stream_lock(substream);
 123         return flags;
 124 }
 125 EXPORT_SYMBOL_GPL(_snd_pcm_stream_lock_irqsave);
 126
 127 void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream,
 128                                       unsigned long flags)
 129 {
 130         snd_pcm_stream_unlock(substream);
 131         if (!substream->pcm->nonatomic)
 132                 local_irq_restore(flags);
 133 }
 134 EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irqrestore);
 135
 136 static inline mm_segment_t snd_enter_user(void)
 137 {
 138         mm_segment_t fs = get_fs();
 139         set_fs(get_ds());
 140         return fs;
 141 }
 142
 143 static inline void snd_leave_user(mm_segment_t fs)
 144 {
 145         set_fs(fs);
 146 }
 147
 148
 149
 150 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
 151 {
 152         struct snd_pcm_runtime *runtime;
 153         struct snd_pcm *pcm = substream->pcm;
 154         struct snd_pcm_str *pstr = substream->pstr;
 155
 156         memset(info, 0, sizeof(*info));
 157         info->card = pcm->card->number;
 158         info->device = pcm->device;
 159         info->stream = substream->stream;
 160         info->subdevice = substream->number;
 161         strlcpy(info->id, pcm->id, sizeof(info->id));
 162         strlcpy(info->name, pcm->name, sizeof(info->name));
 163         info->dev_class = pcm->dev_class;
 164         info->dev_subclass = pcm->dev_subclass;
 165         info->subdevices_count = pstr->substream_count;
 166         info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
 167         strlcpy(info->subname, substream->name, sizeof(info->subname));
 168         runtime = substream->runtime;
 169         /* AB: FIXME!!! This is definitely nonsense */
 170         if (runtime) {
 171                 info->sync = runtime->sync;
 172                 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
 173         }
 174         return 0;
 175 }
 176
 177 int snd_pcm_info_user(struct snd_pcm_substream *substream,
 178                       struct snd_pcm_info __user * _info)
 179 {
 180         struct snd_pcm_info *info;
 181         int err;
 182
 183         info = kmalloc(sizeof(*info), GFP_KERNEL);
 184         if (! info)
 185                 return -ENOMEM;
 186         err = snd_pcm_info(substream, info);
 187         if (err >= 0) {
 188                 if (copy_to_user(_info, info, sizeof(*info)))
 189                         err = -EFAULT;
 190         }
 191         kfree(info);
 192         return err;
 193 }
 194
 195 static bool hw_support_mmap(struct snd_pcm_substream *substream)
 196 {
 197         if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_MMAP))
 198                 return false;
 199         /* check architectures that return -EINVAL from dma_mmap_coherent() */
 200         /* FIXME: this should be some global flag */
 201 #if defined(CONFIG_C6X) || defined(CONFIG_FRV) || defined(CONFIG_MN10300) ||\
 202         defined(CONFIG_PARISC) || defined(CONFIG_XTENSA)
 203         if (!substream->ops->mmap &&
 204             substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
 205                 return false;
 206 #endif
 207         return true;
 208 }
 209
 210 #undef RULES_DEBUG
 211
 212 #ifdef RULES_DEBUG
 213 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
 214 static const char * const snd_pcm_hw_param_names[] = {
 215         HW_PARAM(ACCESS),
 216         HW_PARAM(FORMAT),
 217         HW_PARAM(SUBFORMAT),
 218         HW_PARAM(SAMPLE_BITS),
 219         HW_PARAM(FRAME_BITS),
 220         HW_PARAM(CHANNELS),
 221         HW_PARAM(RATE),
 222         HW_PARAM(PERIOD_TIME),
 223         HW_PARAM(PERIOD_SIZE),
 224         HW_PARAM(PERIOD_BYTES),
 225         HW_PARAM(PERIODS),
 226         HW_PARAM(BUFFER_TIME),
 227         HW_PARAM(BUFFER_SIZE),
 228         HW_PARAM(BUFFER_BYTES),
 229         HW_PARAM(TICK_TIME),
 230 };
 231 #endif
 232
 233 int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
 234                       struct snd_pcm_hw_params *params)
 235 {
 236         unsigned int k;
 237         struct snd_pcm_hardware *hw;
 238         struct snd_interval *i = NULL;
 239         struct snd_mask *m = NULL;
 240         struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
 241         unsigned int rstamps[constrs->rules_num];
 242         unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
 243         unsigned int stamp = 2;
 244         int changed, again;
 245
 246         params->info = 0;
 247         params->fifo_size = 0;
 248         if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
 249                 params->msbits = 0;
 250         if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
 251                 params->rate_num = 0;
 252                 params->rate_den = 0;
 253         }
 254
 255         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
 256                 m = hw_param_mask(params, k);
 257                 if (snd_mask_empty(m))
 258                         return -EINVAL;
 259                 if (!(params->rmask & (1 << k)))
 260                         continue;
 261 #ifdef RULES_DEBUG
 262                 pr_debug("%s = ", snd_pcm_hw_param_names[k]);
 263                 pr_cont("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
 264 #endif
 265                 changed = snd_mask_refine(m, constrs_mask(constrs, k));
 266 #ifdef RULES_DEBUG
 267                 pr_cont("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
 268 #endif
 269                 if (changed)
 270                         params->cmask |= 1 << k;
 271                 if (changed < 0)
 272                         return changed;
 273         }
 274
 275         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
 276                 i = hw_param_interval(params, k);
 277                 if (snd_interval_empty(i))
 278                         return -EINVAL;
 279                 if (!(params->rmask & (1 << k)))
 280                         continue;
 281 #ifdef RULES_DEBUG
 282                 pr_debug("%s = ", snd_pcm_hw_param_names[k]);
 283                 if (i->empty)
 284                         pr_cont("empty");
 285                 else
 286                         pr_cont("%c%u %u%c",
 287                                i->openmin ? '(' : '[', i->min,
 288                                i->max, i->openmax ? ')' : ']');
 289                 pr_cont(" -> ");
 290 #endif
 291                 changed = snd_interval_refine(i, constrs_interval(constrs, k));
 292 #ifdef RULES_DEBUG
 293                 if (i->empty)
 294                         pr_cont("empty\n");
 295                 else
 296                         pr_cont("%c%u %u%c\n",
 297                                i->openmin ? '(' : '[', i->min,
 298                                i->max, i->openmax ? ')' : ']');
 299 #endif
 300                 if (changed)
 301                         params->cmask |= 1 << k;
 302                 if (changed < 0)
 303                         return changed;
 304         }
 305
 306         for (k = 0; k < constrs->rules_num; k++)
 307                 rstamps[k] = 0;
 308         for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
 309                 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
 310         do {
 311                 again = 0;
 312                 for (k = 0; k < constrs->rules_num; k++) {
 313                         struct snd_pcm_hw_rule *r = &constrs->rules[k];
 314                         unsigned int d;
 315                         int doit = 0;
 316                         if (r->cond && !(r->cond & params->flags))
 317                                 continue;
 318                         for (d = 0; r->deps[d] >= 0; d++) {
 319                                 if (vstamps[r->deps[d]] > rstamps[k]) {
 320                                         doit = 1;
 321                                         break;
 322                                 }
 323                         }
 324                         if (!doit)
 325                                 continue;
 326 #ifdef RULES_DEBUG
 327                         pr_debug("Rule %d [%p]: ", k, r->func);
 328                         if (r->var >= 0) {
 329                                 pr_cont("%s = ", snd_pcm_hw_param_names[r->var]);
 330                                 if (hw_is_mask(r->var)) {
 331                                         m = hw_param_mask(params, r->var);
 332                                         pr_cont("%x", *m->bits);
 333                                 } else {
 334                                         i = hw_param_interval(params, r->var);
 335                                         if (i->empty)
 336                                                 pr_cont("empty");
 337                                         else
 338                                                 pr_cont("%c%u %u%c",
 339                                                        i->openmin ? '(' : '[', i->min,
 340                                                        i->max, i->openmax ? ')' : ']');
 341                                 }
 342                         }
 343 #endif
 344                         changed = r->func(params, r);
 345 #ifdef RULES_DEBUG
 346                         if (r->var >= 0) {
 347                                 pr_cont(" -> ");
 348                                 if (hw_is_mask(r->var))
 349                                         pr_cont("%x", *m->bits);
 350                                 else {
 351                                         if (i->empty)
 352                                                 pr_cont("empty");
 353                                         else
 354                                                 pr_cont("%c%u %u%c",
 355                                                        i->openmin ? '(' : '[', i->min,
 356                                                        i->max, i->openmax ? ')' : ']');
 357                                 }
 358                         }
 359                         pr_cont("\n");
 360 #endif
 361                         rstamps[k] = stamp;
 362                         if (changed && r->var >= 0) {
 363                                 params->cmask |= (1 << r->var);
 364                                 vstamps[r->var] = stamp;
 365                                 again = 1;
 366                         }
 367                         if (changed < 0)
 368                                 return changed;
 369                         stamp++;
 370                 }
 371         } while (again);
 372         if (!params->msbits) {
 373                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
 374                 if (snd_interval_single(i))
 375                         params->msbits = snd_interval_value(i);
 376         }
 377
 378         if (!params->rate_den) {
 379                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
 380                 if (snd_interval_single(i)) {
 381                         params->rate_num = snd_interval_value(i);
 382                         params->rate_den = 1;
 383                 }
 384         }
 385
 386         hw = &substream->runtime->hw;
 387         if (!params->info) {
 388                 params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES;
 389                 if (!hw_support_mmap(substream))
 390                         params->info &= ~(SNDRV_PCM_INFO_MMAP |
 391                                           SNDRV_PCM_INFO_MMAP_VALID);
 392         }
 393         if (!params->fifo_size) {
 394                 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
 395                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
 396                 if (snd_mask_min(m) == snd_mask_max(m) &&
 397                     snd_interval_min(i) == snd_interval_max(i)) {
 398                         changed = substream->ops->ioctl(substream,
 399                                         SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
 400                         if (changed < 0)
 401                                 return changed;
 402                 }
 403         }
 404         params->rmask = 0;
 405         return 0;
 406 }
 407
 408 EXPORT_SYMBOL(snd_pcm_hw_refine);
 409
 410 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
 411                                   struct snd_pcm_hw_params __user * _params)
 412 {
 413         struct snd_pcm_hw_params *params;
 414         int err;
 415
 416         params = memdup_user(_params, sizeof(*params));
 417         if (IS_ERR(params))
 418                 return PTR_ERR(params);
 419
 420         err = snd_pcm_hw_refine(substream, params);
 421         if (copy_to_user(_params, params, sizeof(*params))) {
 422                 if (!err)
 423                         err = -EFAULT;
 424         }
 425
 426         kfree(params);
 427         return err;
 428 }
 429
 430 static int period_to_usecs(struct snd_pcm_runtime *runtime)
 431 {
 432         int usecs;
 433
 434         if (! runtime->rate)
 435                 return -1; /* invalid */
 436
 437         /* take 75% of period time as the deadline */
 438         usecs = (750000 / runtime->rate) * runtime->period_size;
 439         usecs += ((750000 % runtime->rate) * runtime->period_size) /
 440                 runtime->rate;
 441
 442         return usecs;
 443 }
 444
 445 static void snd_pcm_set_state(struct snd_pcm_substream *substream, int state)
 446 {
 447         snd_pcm_stream_lock_irq(substream);
 448         if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED)
 449                 substream->runtime->status->state = state;
 450         snd_pcm_stream_unlock_irq(substream);
 451 }
 452
 453 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
 454                              struct snd_pcm_hw_params *params)
 455 {
 456         struct snd_pcm_runtime *runtime;
 457         int err, usecs;
 458         unsigned int bits;
 459         snd_pcm_uframes_t frames;
 460
 461         if (PCM_RUNTIME_CHECK(substream))
 462                 return -ENXIO;
 463         runtime = substream->runtime;
 464         snd_pcm_stream_lock_irq(substream);
 465         switch (runtime->status->state) {
 466         case SNDRV_PCM_STATE_OPEN:
 467         case SNDRV_PCM_STATE_SETUP:
 468         case SNDRV_PCM_STATE_PREPARED:
 469                 break;
 470         default:
 471                 snd_pcm_stream_unlock_irq(substream);
 472                 return -EBADFD;
 473         }
 474         snd_pcm_stream_unlock_irq(substream);
 475 #if IS_ENABLED(CONFIG_SND_PCM_OSS)
 476         if (!substream->oss.oss)
 477 #endif
 478                 if (atomic_read(&substream->mmap_count))
 479                         return -EBADFD;
 480
 481         params->rmask = ~0U;
 482         err = snd_pcm_hw_refine(substream, params);
 483         if (err < 0)
 484                 goto _error;
 485
 486         err = snd_pcm_hw_params_choose(substream, params);
 487         if (err < 0)
 488                 goto _error;
 489
 490         if (substream->ops->hw_params != NULL) {
 491                 err = substream->ops->hw_params(substream, params);
 492                 if (err < 0)
 493                         goto _error;
 494         }
 495
 496         runtime->access = params_access(params);
 497         runtime->format = params_format(params);
 498         runtime->subformat = params_subformat(params);
 499         runtime->channels = params_channels(params);
 500         runtime->rate = params_rate(params);
 501         runtime->period_size = params_period_size(params);
 502         runtime->periods = params_periods(params);
 503         runtime->buffer_size = params_buffer_size(params);
 504         runtime->info = params->info;
 505         runtime->rate_num = params->rate_num;
 506         runtime->rate_den = params->rate_den;
 507         runtime->no_period_wakeup =
 508                         (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
 509                         (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
 510
 511         bits = snd_pcm_format_physical_width(runtime->format);
 512         runtime->sample_bits = bits;
 513         bits *= runtime->channels;
 514         runtime->frame_bits = bits;
 515         frames = 1;
 516         while (bits % 8 != 0) {
 517                 bits *= 2;
 518                 frames *= 2;
 519         }
 520         runtime->byte_align = bits / 8;
 521         runtime->min_align = frames;
 522
 523         /* Default sw params */
 524         runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
 525         runtime->period_step = 1;
 526         runtime->control->avail_min = runtime->period_size;
 527         runtime->start_threshold = 1;
 528         runtime->stop_threshold = runtime->buffer_size;
 529         runtime->silence_threshold = 0;
 530         runtime->silence_size = 0;
 531         runtime->boundary = runtime->buffer_size;
 532         while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
 533                 runtime->boundary *= 2;
 534
 535         snd_pcm_timer_resolution_change(substream);
 536         snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP);
 537
 538         if (pm_qos_request_active(&substream->latency_pm_qos_req))
 539                 pm_qos_remove_request(&substream->latency_pm_qos_req);
 540         if ((usecs = period_to_usecs(runtime)) >= 0)
 541                 pm_qos_add_request(&substream->latency_pm_qos_req,
 542                                    PM_QOS_CPU_DMA_LATENCY, usecs);
 543         return 0;
 544  _error:
 545         /* hardware might be unusable from this time,
 546            so we force application to retry to set
 547            the correct hardware parameter settings */
 548         snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
 549         if (substream->ops->hw_free != NULL)
 550                 substream->ops->hw_free(substream);
 551         return err;
 552 }
 553
 554 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
 555                                   struct snd_pcm_hw_params __user * _params)
 556 {
 557         struct snd_pcm_hw_params *params;
 558         int err;
 559
 560         params = memdup_user(_params, sizeof(*params));
 561         if (IS_ERR(params))
 562                 return PTR_ERR(params);
 563
 564         err = snd_pcm_hw_params(substream, params);
 565         if (copy_to_user(_params, params, sizeof(*params))) {
 566                 if (!err)
 567                         err = -EFAULT;
 568         }
 569
 570         kfree(params);
 571         return err;
 572 }
 573
 574 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
 575 {
 576         struct snd_pcm_runtime *runtime;
 577         int result = 0;
 578
 579         if (PCM_RUNTIME_CHECK(substream))
 580                 return -ENXIO;
 581         runtime = substream->runtime;
 582         snd_pcm_stream_lock_irq(substream);
 583         switch (runtime->status->state) {
 584         case SNDRV_PCM_STATE_SETUP:
 585         case SNDRV_PCM_STATE_PREPARED:
 586                 break;
 587         default:
 588                 snd_pcm_stream_unlock_irq(substream);
 589                 return -EBADFD;
 590         }
 591         snd_pcm_stream_unlock_irq(substream);
 592         if (atomic_read(&substream->mmap_count))
 593                 return -EBADFD;
 594         if (substream->ops->hw_free)
 595                 result = substream->ops->hw_free(substream);
 596         snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
 597         pm_qos_remove_request(&substream->latency_pm_qos_req);
 598         return result;
 599 }
 600
 601 static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
 602                              struct snd_pcm_sw_params *params)
 603 {
 604         struct snd_pcm_runtime *runtime;
 605         int err;
 606
 607         if (PCM_RUNTIME_CHECK(substream))
 608                 return -ENXIO;
 609         runtime = substream->runtime;
 610         snd_pcm_stream_lock_irq(substream);
 611         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 612                 snd_pcm_stream_unlock_irq(substream);
 613                 return -EBADFD;
 614         }
 615         snd_pcm_stream_unlock_irq(substream);
 616
 617         if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
 618                 return -EINVAL;
 619         if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12) &&
 620             params->tstamp_type > SNDRV_PCM_TSTAMP_TYPE_LAST)
 621                 return -EINVAL;
 622         if (params->avail_min == 0)
 623                 return -EINVAL;
 624         if (params->silence_size >= runtime->boundary) {
 625                 if (params->silence_threshold != 0)
 626                         return -EINVAL;
 627         } else {
 628                 if (params->silence_size > params->silence_threshold)
 629                         return -EINVAL;
 630                 if (params->silence_threshold > runtime->buffer_size)
 631                         return -EINVAL;
 632         }
 633         err = 0;
 634         snd_pcm_stream_lock_irq(substream);
 635         runtime->tstamp_mode = params->tstamp_mode;
 636         if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12))
 637                 runtime->tstamp_type = params->tstamp_type;
 638         runtime->period_step = params->period_step;
 639         runtime->control->avail_min = params->avail_min;
 640         runtime->start_threshold = params->start_threshold;
 641         runtime->stop_threshold = params->stop_threshold;
 642         runtime->silence_threshold = params->silence_threshold;
 643         runtime->silence_size = params->silence_size;
 644         params->boundary = runtime->boundary;
 645         if (snd_pcm_running(substream)) {
 646                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 647                     runtime->silence_size > 0)
 648                         snd_pcm_playback_silence(substream, ULONG_MAX);
 649                 err = snd_pcm_update_state(substream, runtime);
 650         }
 651         snd_pcm_stream_unlock_irq(substream);
 652         return err;
 653 }
 654
 655 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
 656                                   struct snd_pcm_sw_params __user * _params)
 657 {
 658         struct snd_pcm_sw_params params;
 659         int err;
 660         if (copy_from_user(&params, _params, sizeof(params)))
 661                 return -EFAULT;
 662         err = snd_pcm_sw_params(substream, &params);
 663         if (copy_to_user(_params, &params, sizeof(params)))
 664                 return -EFAULT;
 665         return err;
 666 }
 667
 668 int snd_pcm_status(struct snd_pcm_substream *substream,
 669                    struct snd_pcm_status *status)
 670 {
 671         struct snd_pcm_runtime *runtime = substream->runtime;
 672
 673         snd_pcm_stream_lock_irq(substream);
 674         status->state = runtime->status->state;
 675         status->suspended_state = runtime->status->suspended_state;
 676         if (status->state == SNDRV_PCM_STATE_OPEN)
 677                 goto _end;
 678         status->trigger_tstamp = runtime->trigger_tstamp;
 679         if (snd_pcm_running(substream)) {
 680                 snd_pcm_update_hw_ptr(substream);
 681                 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
 682                         status->tstamp = runtime->status->tstamp;
 683                         status->audio_tstamp =
 684                                 runtime->status->audio_tstamp;
 685                         goto _tstamp_end;
 686                 }
 687         }
 688         snd_pcm_gettime(runtime, &status->tstamp);
 689  _tstamp_end:
 690         status->appl_ptr = runtime->control->appl_ptr;
 691         status->hw_ptr = runtime->status->hw_ptr;
 692         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 693                 status->avail = snd_pcm_playback_avail(runtime);
 694                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
 695                     runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
 696                         status->delay = runtime->buffer_size - status->avail;
 697                         status->delay += runtime->delay;
 698                 } else
 699                         status->delay = 0;
 700         } else {
 701                 status->avail = snd_pcm_capture_avail(runtime);
 702                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
 703                         status->delay = status->avail + runtime->delay;
 704                 else
 705                         status->delay = 0;
 706         }
 707         status->avail_max = runtime->avail_max;
 708         status->overrange = runtime->overrange;
 709         runtime->avail_max = 0;
 710         runtime->overrange = 0;
 711  _end:
 712         snd_pcm_stream_unlock_irq(substream);
 713         return 0;
 714 }
 715
 716 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
 717                                struct snd_pcm_status __user * _status)
 718 {
 719         struct snd_pcm_status status;
 720         int res;
 721
 722         memset(&status, 0, sizeof(status));
 723         res = snd_pcm_status(substream, &status);
 724         if (res < 0)
 725                 return res;
 726         if (copy_to_user(_status, &status, sizeof(status)))
 727                 return -EFAULT;
 728         return 0;
 729 }
 730
 731 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
 732                                 struct snd_pcm_channel_info * info)
 733 {
 734         struct snd_pcm_runtime *runtime;
 735         unsigned int channel;
 736
 737         channel = info->channel;
 738         runtime = substream->runtime;
 739         snd_pcm_stream_lock_irq(substream);
 740         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 741                 snd_pcm_stream_unlock_irq(substream);
 742                 return -EBADFD;
 743         }
 744         snd_pcm_stream_unlock_irq(substream);
 745         if (channel >= runtime->channels)
 746                 return -EINVAL;
 747         memset(info, 0, sizeof(*info));
 748         info->channel = channel;
 749         return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
 750 }
 751
 752 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
 753                                      struct snd_pcm_channel_info __user * _info)
 754 {
 755         struct snd_pcm_channel_info info;
 756         int res;
 757
 758         if (copy_from_user(&info, _info, sizeof(info)))
 759                 return -EFAULT;
 760         res = snd_pcm_channel_info(substream, &info);
 761         if (res < 0)
 762                 return res;
 763         if (copy_to_user(_info, &info, sizeof(info)))
 764                 return -EFAULT;
 765         return 0;
 766 }
 767
 768 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
 769 {
 770         struct snd_pcm_runtime *runtime = substream->runtime;
 771         if (runtime->trigger_master == NULL)
 772                 return;
 773         if (runtime->trigger_master == substream) {
 774                 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
 775         } else {
 776                 snd_pcm_trigger_tstamp(runtime->trigger_master);
 777                 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
 778         }
 779         runtime->trigger_master = NULL;
 780 }
 781
 782 struct action_ops {
 783         int (*pre_action)(struct snd_pcm_substream *substream, int state);
 784         int (*do_action)(struct snd_pcm_substream *substream, int state);
 785         void (*undo_action)(struct snd_pcm_substream *substream, int state);
 786         void (*post_action)(struct snd_pcm_substream *substream, int state);
 787 };
 788
 789 /*
 790  *  this functions is core for handling of linked stream
 791  *  Note: the stream state might be changed also on failure
 792  *  Note2: call with calling stream lock + link lock
 793  */
 794 static int snd_pcm_action_group(struct action_ops *ops,
 795                                 struct snd_pcm_substream *substream,
 796                                 int state, int do_lock)
 797 {
 798         struct snd_pcm_substream *s = NULL;
 799         struct snd_pcm_substream *s1;
 800         int res = 0;
 801
 802         snd_pcm_group_for_each_entry(s, substream) {
 803                 if (do_lock && s != substream) {
 804                         if (s->pcm->nonatomic)
 805                                 mutex_lock_nested(&s->self_group.mutex,
 806                                                   SINGLE_DEPTH_NESTING);
 807                         else
 808                                 spin_lock_nested(&s->self_group.lock,
 809                                                  SINGLE_DEPTH_NESTING);
 810                 }
 811                 res = ops->pre_action(s, state);
 812                 if (res < 0)
 813                         goto _unlock;
 814         }
 815         snd_pcm_group_for_each_entry(s, substream) {
 816                 res = ops->do_action(s, state);
 817                 if (res < 0) {
 818                         if (ops->undo_action) {
 819                                 snd_pcm_group_for_each_entry(s1, substream) {
 820                                         if (s1 == s) /* failed stream */
 821                                                 break;
 822                                         ops->undo_action(s1, state);
 823                                 }
 824                         }
 825                         s = NULL; /* unlock all */
 826                         goto _unlock;
 827                 }
 828         }
 829         snd_pcm_group_for_each_entry(s, substream) {
 830                 ops->post_action(s, state);
 831         }
 832  _unlock:
 833         if (do_lock) {
 834                 /* unlock streams */
 835                 snd_pcm_group_for_each_entry(s1, substream) {
 836                         if (s1 != substream) {
 837                                 if (s1->pcm->nonatomic)
 838                                         mutex_unlock(&s1->self_group.mutex);
 839                                 else
 840                                         spin_unlock(&s1->self_group.lock);
 841                         }
 842                         if (s1 == s)    /* end */
 843                                 break;
 844                 }
 845         }
 846         return res;
 847 }
 848
 849 /*
 850  *  Note: call with stream lock
 851  */
 852 static int snd_pcm_action_single(struct action_ops *ops,
 853                                  struct snd_pcm_substream *substream,
 854                                  int state)
 855 {
 856         int res;
 857
 858         res = ops->pre_action(substream, state);
 859         if (res < 0)
 860                 return res;
 861         res = ops->do_action(substream, state);
 862         if (res == 0)
 863                 ops->post_action(substream, state);
 864         else if (ops->undo_action)
 865                 ops->undo_action(substream, state);
 866         return res;
 867 }
 868
 869 /* call in mutex-protected context */
 870 static int snd_pcm_action_mutex(struct action_ops *ops,
 871                                 struct snd_pcm_substream *substream,
 872                                 int state)
 873 {
 874         int res;
 875
 876         if (snd_pcm_stream_linked(substream)) {
 877                 if (!mutex_trylock(&substream->group->mutex)) {
 878                         mutex_unlock(&substream->self_group.mutex);
 879                         mutex_lock(&substream->group->mutex);
 880                         mutex_lock(&substream->self_group.mutex);
 881                 }
 882                 res = snd_pcm_action_group(ops, substream, state, 1);
 883                 mutex_unlock(&substream->group->mutex);
 884         } else {
 885                 res = snd_pcm_action_single(ops, substream, state);
 886         }
 887         return res;
 888 }
 889
 890 /*
 891  *  Note: call with stream lock
 892  */
 893 static int snd_pcm_action(struct action_ops *ops,
 894                           struct snd_pcm_substream *substream,
 895                           int state)
 896 {
 897         int res;
 898
 899         if (substream->pcm->nonatomic)
 900                 return snd_pcm_action_mutex(ops, substream, state);
 901
 902         if (snd_pcm_stream_linked(substream)) {
 903                 if (!spin_trylock(&substream->group->lock)) {
 904                         spin_unlock(&substream->self_group.lock);
 905                         spin_lock(&substream->group->lock);
 906                         spin_lock(&substream->self_group.lock);
 907                 }
 908                 res = snd_pcm_action_group(ops, substream, state, 1);
 909                 spin_unlock(&substream->group->lock);
 910         } else {
 911                 res = snd_pcm_action_single(ops, substream, state);
 912         }
 913         return res;
 914 }
 915
 916 static int snd_pcm_action_lock_mutex(struct action_ops *ops,
 917                                      struct snd_pcm_substream *substream,
 918                                      int state)
 919 {
 920         int res;
 921
 922         down_read(&snd_pcm_link_rwsem);
 923         if (snd_pcm_stream_linked(substream)) {
 924                 mutex_lock(&substream->group->mutex);
 925                 mutex_lock_nested(&substream->self_group.mutex,
 926                                   SINGLE_DEPTH_NESTING);
 927                 res = snd_pcm_action_group(ops, substream, state, 1);
 928                 mutex_unlock(&substream->self_group.mutex);
 929                 mutex_unlock(&substream->group->mutex);
 930         } else {
 931                 mutex_lock(&substream->self_group.mutex);
 932                 res = snd_pcm_action_single(ops, substream, state);
 933                 mutex_unlock(&substream->self_group.mutex);
 934         }
 935         up_read(&snd_pcm_link_rwsem);
 936         return res;
 937 }
 938
 939 /*
 940  *  Note: don't use any locks before
 941  */
 942 static int snd_pcm_action_lock_irq(struct action_ops *ops,
 943                                    struct snd_pcm_substream *substream,
 944                                    int state)
 945 {
 946         int res;
 947
 948         if (substream->pcm->nonatomic)
 949                 return snd_pcm_action_lock_mutex(ops, substream, state);
 950
 951         read_lock_irq(&snd_pcm_link_rwlock);
 952         if (snd_pcm_stream_linked(substream)) {
 953                 spin_lock(&substream->group->lock);
 954                 spin_lock(&substream->self_group.lock);
 955                 res = snd_pcm_action_group(ops, substream, state, 1);
 956                 spin_unlock(&substream->self_group.lock);
 957                 spin_unlock(&substream->group->lock);
 958         } else {
 959                 spin_lock(&substream->self_group.lock);
 960                 res = snd_pcm_action_single(ops, substream, state);
 961                 spin_unlock(&substream->self_group.lock);
 962         }
 963         read_unlock_irq(&snd_pcm_link_rwlock);
 964         return res;
 965 }
 966
 967 /*
 968  */
 969 static int snd_pcm_action_nonatomic(struct action_ops *ops,
 970                                     struct snd_pcm_substream *substream,
 971                                     int state)
 972 {
 973         int res;
 974
 975         down_read(&snd_pcm_link_rwsem);
 976         if (snd_pcm_stream_linked(substream))
 977                 res = snd_pcm_action_group(ops, substream, state, 0);
 978         else
 979                 res = snd_pcm_action_single(ops, substream, state);
 980         up_read(&snd_pcm_link_rwsem);
 981         return res;
 982 }
 983
 984 /*
 985  * start callbacks
 986  */
 987 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
 988 {
 989         struct snd_pcm_runtime *runtime = substream->runtime;
 990         if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
 991                 return -EBADFD;
 992         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 993             !snd_pcm_playback_data(substream))
 994                 return -EPIPE;
 995         runtime->trigger_master = substream;
 996         return 0;
 997 }
 998
 999 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
1000 {
1001         if (substream->runtime->trigger_master != substream)
1002                 return 0;
1003         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
1004 }
1005
1006 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
1007 {
1008         if (substream->runtime->trigger_master == substream)
1009                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1010 }
1011
1012 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
1013 {
1014         struct snd_pcm_runtime *runtime = substream->runtime;
1015         snd_pcm_trigger_tstamp(substream);
1016         runtime->hw_ptr_jiffies = jiffies;
1017         runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
1018                                                             runtime->rate;
1019         runtime->status->state = state;
1020         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1021             runtime->silence_size > 0)
1022                 snd_pcm_playback_silence(substream, ULONG_MAX);
1023         if (substream->timer)
1024                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
1025                                  &runtime->trigger_tstamp);
1026 }
1027
1028 static struct action_ops snd_pcm_action_start = {
1029         .pre_action = snd_pcm_pre_start,
1030         .do_action = snd_pcm_do_start,
1031         .undo_action = snd_pcm_undo_start,
1032         .post_action = snd_pcm_post_start
1033 };
1034
1035 /**
1036  * snd_pcm_start - start all linked streams
1037  * @substream: the PCM substream instance
1038  *
1039  * Return: Zero if successful, or a negative error code.
1040  */
1041 int snd_pcm_start(struct snd_pcm_substream *substream)
1042 {
1043         return snd_pcm_action(&snd_pcm_action_start, substream,
1044                               SNDRV_PCM_STATE_RUNNING);
1045 }
1046
1047 /*
1048  * stop callbacks
1049  */
1050 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
1051 {
1052         struct snd_pcm_runtime *runtime = substream->runtime;
1053         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1054                 return -EBADFD;
1055         runtime->trigger_master = substream;
1056         return 0;
1057 }
1058
1059 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
1060 {
1061         if (substream->runtime->trigger_master == substream &&
1062             snd_pcm_running(substream))
1063                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1064         return 0; /* unconditonally stop all substreams */
1065 }
1066
1067 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
1068 {
1069         struct snd_pcm_runtime *runtime = substream->runtime;
1070         if (runtime->status->state != state) {
1071                 snd_pcm_trigger_tstamp(substream);
1072                 if (substream->timer)
1073                         snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
1074                                          &runtime->trigger_tstamp);
1075                 runtime->status->state = state;
1076         }
1077         wake_up(&runtime->sleep);
1078         wake_up(&runtime->tsleep);
1079 }
1080
1081 static struct action_ops snd_pcm_action_stop = {
1082         .pre_action = snd_pcm_pre_stop,
1083         .do_action = snd_pcm_do_stop,
1084         .post_action = snd_pcm_post_stop
1085 };
1086
1087 /**
1088  * snd_pcm_stop - try to stop all running streams in the substream group
1089  * @substream: the PCM substream instance
1090  * @state: PCM state after stopping the stream
1091  *
1092  * The state of each stream is then changed to the given state unconditionally.
1093  *
1094  * Return: Zero if successful, or a negative error code.
1095  */
1096 int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
1097 {
1098         return snd_pcm_action(&snd_pcm_action_stop, substream, state);
1099 }
1100
1101 EXPORT_SYMBOL(snd_pcm_stop);
1102
1103 /**
1104  * snd_pcm_drain_done - stop the DMA only when the given stream is playback
1105  * @substream: the PCM substream
1106  *
1107  * After stopping, the state is changed to SETUP.
1108  * Unlike snd_pcm_stop(), this affects only the given stream.
1109  *
1110  * Return: Zero if succesful, or a negative error code.
1111  */
1112 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
1113 {
1114         return snd_pcm_action_single(&snd_pcm_action_stop, substream,
1115                                      SNDRV_PCM_STATE_SETUP);
1116 }
1117
1118 /*
1119  * pause callbacks
1120  */
1121 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
1122 {
1123         struct snd_pcm_runtime *runtime = substream->runtime;
1124         if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
1125                 return -ENOSYS;
1126         if (push) {
1127                 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
1128                         return -EBADFD;
1129         } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
1130                 return -EBADFD;
1131         runtime->trigger_master = substream;
1132         return 0;
1133 }
1134
1135 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
1136 {
1137         if (substream->runtime->trigger_master != substream)
1138                 return 0;
1139         /* some drivers might use hw_ptr to recover from the pause -
1140            update the hw_ptr now */
1141         if (push)
1142                 snd_pcm_update_hw_ptr(substream);
1143         /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
1144          * a delta between the current jiffies, this gives a large enough
1145          * delta, effectively to skip the check once.
1146          */
1147         substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
1148         return substream->ops->trigger(substream,
1149                                        push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
1150                                               SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
1151 }
1152
1153 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1154 {
1155         if (substream->runtime->trigger_master == substream)
1156                 substream->ops->trigger(substream,
1157                                         push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1158                                         SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1159 }
1160
1161 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1162 {
1163         struct snd_pcm_runtime *runtime = substream->runtime;
1164         snd_pcm_trigger_tstamp(substream);
1165         if (push) {
1166                 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1167                 if (substream->timer)
1168                         snd_timer_notify(substream->timer,
1169                                          SNDRV_TIMER_EVENT_MPAUSE,
1170                                          &runtime->trigger_tstamp);
1171                 wake_up(&runtime->sleep);
1172                 wake_up(&runtime->tsleep);
1173         } else {
1174                 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1175                 if (substream->timer)
1176                         snd_timer_notify(substream->timer,
1177                                          SNDRV_TIMER_EVENT_MCONTINUE,
1178                                          &runtime->trigger_tstamp);
1179         }
1180 }
1181
1182 static struct action_ops snd_pcm_action_pause = {
1183         .pre_action = snd_pcm_pre_pause,
1184         .do_action = snd_pcm_do_pause,
1185         .undo_action = snd_pcm_undo_pause,
1186         .post_action = snd_pcm_post_pause
1187 };
1188
1189 /*
1190  * Push/release the pause for all linked streams.
1191  */
1192 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1193 {
1194         return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1195 }
1196
1197 #ifdef CONFIG_PM
1198 /* suspend */
1199
1200 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1201 {
1202         struct snd_pcm_runtime *runtime = substream->runtime;
1203         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1204                 return -EBUSY;
1205         runtime->trigger_master = substream;
1206         return 0;
1207 }
1208
1209 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1210 {
1211         struct snd_pcm_runtime *runtime = substream->runtime;
1212         if (runtime->trigger_master != substream)
1213                 return 0;
1214         if (! snd_pcm_running(substream))
1215                 return 0;
1216         substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1217         return 0; /* suspend unconditionally */
1218 }
1219
1220 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1221 {
1222         struct snd_pcm_runtime *runtime = substream->runtime;
1223         snd_pcm_trigger_tstamp(substream);
1224         if (substream->timer)
1225                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1226                                  &runtime->trigger_tstamp);
1227         runtime->status->suspended_state = runtime->status->state;
1228         runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1229         wake_up(&runtime->sleep);
1230         wake_up(&runtime->tsleep);
1231 }
1232
1233 static struct action_ops snd_pcm_action_suspend = {
1234         .pre_action = snd_pcm_pre_suspend,
1235         .do_action = snd_pcm_do_suspend,
1236         .post_action = snd_pcm_post_suspend
1237 };
1238
1239 /**
1240  * snd_pcm_suspend - trigger SUSPEND to all linked streams
1241  * @substream: the PCM substream
1242  *
1243  * After this call, all streams are changed to SUSPENDED state.
1244  *
1245  * Return: Zero if successful (or @substream is %NULL), or a negative error
1246  * code.
1247  */
1248 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1249 {
1250         int err;
1251         unsigned long flags;
1252
1253         if (! substream)
1254                 return 0;
1255
1256         snd_pcm_stream_lock_irqsave(substream, flags);
1257         err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1258         snd_pcm_stream_unlock_irqrestore(substream, flags);
1259         return err;
1260 }
1261
1262 EXPORT_SYMBOL(snd_pcm_suspend);
1263
1264 /**
1265  * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1266  * @pcm: the PCM instance
1267  *
1268  * After this call, all streams are changed to SUSPENDED state.
1269  *
1270  * Return: Zero if successful (or @pcm is %NULL), or a negative error code.
1271  */
1272 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1273 {
1274         struct snd_pcm_substream *substream;
1275         int stream, err = 0;
1276
1277         if (! pcm)
1278                 return 0;
1279
1280         for (stream = 0; stream < 2; stream++) {
1281                 for (substream = pcm->streams[stream].substream;
1282                      substream; substream = substream->next) {
1283                         /* FIXME: the open/close code should lock this as well */
1284                         if (substream->runtime == NULL)
1285                                 continue;
1286                         err = snd_pcm_suspend(substream);
1287                         if (err < 0 && err != -EBUSY)
1288                                 return err;
1289                 }
1290         }
1291         return 0;
1292 }
1293
1294 EXPORT_SYMBOL(snd_pcm_suspend_all);
1295
1296 /* resume */
1297
1298 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1299 {
1300         struct snd_pcm_runtime *runtime = substream->runtime;
1301         if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1302                 return -ENOSYS;
1303         runtime->trigger_master = substream;
1304         return 0;
1305 }
1306
1307 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1308 {
1309         struct snd_pcm_runtime *runtime = substream->runtime;
1310         if (runtime->trigger_master != substream)
1311                 return 0;
1312         /* DMA not running previously? */
1313         if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1314             (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1315              substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1316                 return 0;
1317         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1318 }
1319
1320 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1321 {
1322         if (substream->runtime->trigger_master == substream &&
1323             snd_pcm_running(substream))
1324                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1325 }
1326
1327 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1328 {
1329         struct snd_pcm_runtime *runtime = substream->runtime;
1330         snd_pcm_trigger_tstamp(substream);
1331         if (substream->timer)
1332                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1333                                  &runtime->trigger_tstamp);
1334         runtime->status->state = runtime->status->suspended_state;
1335 }
1336
1337 static struct action_ops snd_pcm_action_resume = {
1338         .pre_action = snd_pcm_pre_resume,
1339         .do_action = snd_pcm_do_resume,
1340         .undo_action = snd_pcm_undo_resume,
1341         .post_action = snd_pcm_post_resume
1342 };
1343
1344 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1345 {
1346         struct snd_card *card = substream->pcm->card;
1347         int res;
1348
1349         snd_power_lock(card);
1350         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1351                 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1352         snd_power_unlock(card);
1353         return res;
1354 }
1355
1356 #else
1357
1358 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1359 {
1360         return -ENOSYS;
1361 }
1362
1363 #endif /* CONFIG_PM */
1364
1365 /*
1366  * xrun ioctl
1367  *
1368  * Change the RUNNING stream(s) to XRUN state.
1369  */
1370 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1371 {
1372         struct snd_card *card = substream->pcm->card;
1373         struct snd_pcm_runtime *runtime = substream->runtime;
1374         int result;
1375
1376         snd_power_lock(card);
1377         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1378                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1379                 if (result < 0)
1380                         goto _unlock;
1381         }
1382
1383         snd_pcm_stream_lock_irq(substream);
1384         switch (runtime->status->state) {
1385         case SNDRV_PCM_STATE_XRUN:
1386                 result = 0;     /* already there */
1387                 break;
1388         case SNDRV_PCM_STATE_RUNNING:
1389                 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1390                 break;
1391         default:
1392                 result = -EBADFD;
1393         }
1394         snd_pcm_stream_unlock_irq(substream);
1395  _unlock:
1396         snd_power_unlock(card);
1397         return result;
1398 }
1399
1400 /*
1401  * reset ioctl
1402  */
1403 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1404 {
1405         struct snd_pcm_runtime *runtime = substream->runtime;
1406         switch (runtime->status->state) {
1407         case SNDRV_PCM_STATE_RUNNING:
1408         case SNDRV_PCM_STATE_PREPARED:
1409         case SNDRV_PCM_STATE_PAUSED:
1410         case SNDRV_PCM_STATE_SUSPENDED:
1411                 return 0;
1412         default:
1413                 return -EBADFD;
1414         }
1415 }
1416
1417 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1418 {
1419         struct snd_pcm_runtime *runtime = substream->runtime;
1420         int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1421         if (err < 0)
1422                 return err;
1423         runtime->hw_ptr_base = 0;
1424         runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1425                 runtime->status->hw_ptr % runtime->period_size;
1426         runtime->silence_start = runtime->status->hw_ptr;
1427         runtime->silence_filled = 0;
1428         return 0;
1429 }
1430
1431 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1432 {
1433         struct snd_pcm_runtime *runtime = substream->runtime;
1434         runtime->control->appl_ptr = runtime->status->hw_ptr;
1435         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1436             runtime->silence_size > 0)
1437                 snd_pcm_playback_silence(substream, ULONG_MAX);
1438 }
1439
1440 static struct action_ops snd_pcm_action_reset = {
1441         .pre_action = snd_pcm_pre_reset,
1442         .do_action = snd_pcm_do_reset,
1443         .post_action = snd_pcm_post_reset
1444 };
1445
1446 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1447 {
1448         return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1449 }
1450
1451 /*
1452  * prepare ioctl
1453  */
1454 /* we use the second argument for updating f_flags */
1455 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1456                                int f_flags)
1457 {
1458         struct snd_pcm_runtime *runtime = substream->runtime;
1459         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1460             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1461                 return -EBADFD;
1462         if (snd_pcm_running(substream))
1463                 return -EBUSY;
1464         substream->f_flags = f_flags;
1465         return 0;
1466 }
1467
1468 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1469 {
1470         int err;
1471         err = substream->ops->prepare(substream);
1472         if (err < 0)
1473                 return err;
1474         return snd_pcm_do_reset(substream, 0);
1475 }
1476
1477 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1478 {
1479         struct snd_pcm_runtime *runtime = substream->runtime;
1480         runtime->control->appl_ptr = runtime->status->hw_ptr;
1481         snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED);
1482 }
1483
1484 static struct action_ops snd_pcm_action_prepare = {
1485         .pre_action = snd_pcm_pre_prepare,
1486         .do_action = snd_pcm_do_prepare,
1487         .post_action = snd_pcm_post_prepare
1488 };
1489
1490 /**
1491  * snd_pcm_prepare - prepare the PCM substream to be triggerable
1492  * @substream: the PCM substream instance
1493  * @file: file to refer f_flags
1494  *
1495  * Return: Zero if successful, or a negative error code.
1496  */
1497 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1498                            struct file *file)
1499 {
1500         int res;
1501         struct snd_card *card = substream->pcm->card;
1502         int f_flags;
1503
1504         if (file)
1505                 f_flags = file->f_flags;
1506         else
1507                 f_flags = substream->f_flags;
1508
1509         snd_power_lock(card);
1510         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1511                 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1512                                                substream, f_flags);
1513         snd_power_unlock(card);
1514         return res;
1515 }
1516
1517 /*
1518  * drain ioctl
1519  */
1520
1521 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1522 {
1523         struct snd_pcm_runtime *runtime = substream->runtime;
1524         switch (runtime->status->state) {
1525         case SNDRV_PCM_STATE_OPEN:
1526         case SNDRV_PCM_STATE_DISCONNECTED:
1527         case SNDRV_PCM_STATE_SUSPENDED:
1528                 return -EBADFD;
1529         }
1530         runtime->trigger_master = substream;
1531         return 0;
1532 }
1533
1534 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1535 {
1536         struct snd_pcm_runtime *runtime = substream->runtime;
1537         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1538                 switch (runtime->status->state) {
1539                 case SNDRV_PCM_STATE_PREPARED:
1540                         /* start playback stream if possible */
1541                         if (! snd_pcm_playback_empty(substream)) {
1542                                 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1543                                 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1544                         }
1545                         break;
1546                 case SNDRV_PCM_STATE_RUNNING:
1547                         runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1548                         break;
1549                 case SNDRV_PCM_STATE_XRUN:
1550                         runtime->status->state = SNDRV_PCM_STATE_SETUP;
1551                         break;
1552                 default:
1553                         break;
1554                 }
1555         } else {
1556                 /* stop running stream */
1557                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1558                         int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1559                                 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1560                         snd_pcm_do_stop(substream, new_state);
1561                         snd_pcm_post_stop(substream, new_state);
1562                 }
1563         }
1564         return 0;
1565 }
1566
1567 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1568 {
1569 }
1570
1571 static struct action_ops snd_pcm_action_drain_init = {
1572         .pre_action = snd_pcm_pre_drain_init,
1573         .do_action = snd_pcm_do_drain_init,
1574         .post_action = snd_pcm_post_drain_init
1575 };
1576
1577 static int snd_pcm_drop(struct snd_pcm_substream *substream);
1578
1579 /*
1580  * Drain the stream(s).
1581  * When the substream is linked, sync until the draining of all playback streams
1582  * is finished.
1583  * After this call, all streams are supposed to be either SETUP or DRAINING
1584  * (capture only) state.
1585  */
1586 static int snd_pcm_drain(struct snd_pcm_substream *substream,
1587                          struct file *file)
1588 {
1589         struct snd_card *card;
1590         struct snd_pcm_runtime *runtime;
1591         struct snd_pcm_substream *s;
1592         wait_queue_t wait;
1593         int result = 0;
1594         int nonblock = 0;
1595
1596         card = substream->pcm->card;
1597         runtime = substream->runtime;
1598
1599         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1600                 return -EBADFD;
1601
1602         snd_power_lock(card);
1603         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1604                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1605                 if (result < 0) {
1606                         snd_power_unlock(card);
1607                         return result;
1608                 }
1609         }
1610
1611         if (file) {
1612                 if (file->f_flags & O_NONBLOCK)
1613                         nonblock = 1;
1614         } else if (substream->f_flags & O_NONBLOCK)
1615                 nonblock = 1;
1616
1617         down_read(&snd_pcm_link_rwsem);
1618         snd_pcm_stream_lock_irq(substream);
1619         /* resume pause */
1620         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1621                 snd_pcm_pause(substream, 0);
1622
1623         /* pre-start/stop - all running streams are changed to DRAINING state */
1624         result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1625         if (result < 0)
1626                 goto unlock;
1627         /* in non-blocking, we don't wait in ioctl but let caller poll */
1628         if (nonblock) {
1629                 result = -EAGAIN;
1630                 goto unlock;
1631         }
1632
1633         for (;;) {
1634                 long tout;
1635                 struct snd_pcm_runtime *to_check;
1636                 if (signal_pending(current)) {
1637                         result = -ERESTARTSYS;
1638                         break;
1639                 }
1640                 /* find a substream to drain */
1641                 to_check = NULL;
1642                 snd_pcm_group_for_each_entry(s, substream) {
1643                         if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1644                                 continue;
1645                         runtime = s->runtime;
1646                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1647                                 to_check = runtime;
1648                                 break;
1649                         }
1650                 }
1651                 if (!to_check)
1652                         break; /* all drained */
1653                 init_waitqueue_entry(&wait, current);
1654                 add_wait_queue(&to_check->sleep, &wait);
1655                 snd_pcm_stream_unlock_irq(substream);
1656                 up_read(&snd_pcm_link_rwsem);
1657                 snd_power_unlock(card);
1658                 if (runtime->no_period_wakeup)
1659                         tout = MAX_SCHEDULE_TIMEOUT;
1660                 else {
1661                         tout = 10;
1662                         if (runtime->rate) {
1663                                 long t = runtime->period_size * 2 / runtime->rate;
1664                                 tout = max(t, tout);
1665                         }
1666                         tout = msecs_to_jiffies(tout * 1000);
1667                 }
1668                 tout = schedule_timeout_interruptible(tout);
1669                 snd_power_lock(card);
1670                 down_read(&snd_pcm_link_rwsem);
1671                 snd_pcm_stream_lock_irq(substream);
1672                 remove_wait_queue(&to_check->sleep, &wait);
1673                 if (card->shutdown) {
1674                         result = -ENODEV;
1675                         break;
1676                 }
1677                 if (tout == 0) {
1678                         if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1679                                 result = -ESTRPIPE;
1680                         else {
1681                                 dev_dbg(substream->pcm->card->dev,
1682                                         "playback drain error (DMA or IRQ trouble?)\n");
1683                                 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1684                                 result = -EIO;
1685                         }
1686                         break;
1687                 }
1688         }
1689
1690  unlock:
1691         snd_pcm_stream_unlock_irq(substream);
1692         up_read(&snd_pcm_link_rwsem);
1693         snd_power_unlock(card);
1694
1695         return result;
1696 }
1697
1698 /*
1699  * drop ioctl
1700  *
1701  * Immediately put all linked substreams into SETUP state.
1702  */
1703 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1704 {
1705         struct snd_pcm_runtime *runtime;
1706         int result = 0;
1707
1708         if (PCM_RUNTIME_CHECK(substream))
1709                 return -ENXIO;
1710         runtime = substream->runtime;
1711
1712         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1713             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1714             runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1715                 return -EBADFD;
1716
1717         snd_pcm_stream_lock_irq(substream);
1718         /* resume pause */
1719         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1720                 snd_pcm_pause(substream, 0);
1721
1722         snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1723         /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1724         snd_pcm_stream_unlock_irq(substream);
1725
1726         return result;
1727 }
1728
1729
1730 static bool is_pcm_file(struct file *file)
1731 {
1732         struct inode *inode = file_inode(file);
1733         unsigned int minor;
1734
1735         if (!S_ISCHR(inode->i_mode) || imajor(inode) != snd_major)
1736                 return false;
1737         minor = iminor(inode);
1738         return snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) ||
1739                 snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE);
1740 }
1741
1742 /*
1743  * PCM link handling
1744  */
1745 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1746 {
1747         int res = 0;
1748         struct snd_pcm_file *pcm_file;
1749         struct snd_pcm_substream *substream1;
1750         struct snd_pcm_group *group;
1751         struct fd f = fdget(fd);
1752
1753         if (!f.file)
1754                 return -EBADFD;
1755         if (!is_pcm_file(f.file)) {
1756                 res = -EBADFD;
1757                 goto _badf;
1758         }
1759         pcm_file = f.file->private_data;
1760         substream1 = pcm_file->substream;
1761         group = kmalloc(sizeof(*group), GFP_KERNEL);
1762         if (!group) {
1763                 res = -ENOMEM;
1764                 goto _nolock;
1765         }
1766         down_write(&snd_pcm_link_rwsem);
1767         write_lock_irq(&snd_pcm_link_rwlock);
1768         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1769             substream->runtime->status->state != substream1->runtime->status->state ||
1770             substream->pcm->nonatomic != substream1->pcm->nonatomic) {
1771                 res = -EBADFD;
1772                 goto _end;
1773         }
1774         if (snd_pcm_stream_linked(substream1)) {
1775                 res = -EALREADY;
1776                 goto _end;
1777         }
1778         if (!snd_pcm_stream_linked(substream)) {
1779                 substream->group = group;
1780                 group = NULL;
1781                 spin_lock_init(&substream->group->lock);
1782                 mutex_init(&substream->group->mutex);
1783                 INIT_LIST_HEAD(&substream->group->substreams);
1784                 list_add_tail(&substream->link_list, &substream->group->substreams);
1785                 substream->group->count = 1;
1786         }
1787         list_add_tail(&substream1->link_list, &substream->group->substreams);
1788         substream->group->count++;
1789         substream1->group = substream->group;
1790  _end:
1791         write_unlock_irq(&snd_pcm_link_rwlock);
1792         up_write(&snd_pcm_link_rwsem);
1793  _nolock:
1794         snd_card_unref(substream1->pcm->card);
1795         kfree(group);
1796  _badf:
1797         fdput(f);
1798         return res;
1799 }
1800
1801 static void relink_to_local(struct snd_pcm_substream *substream)
1802 {
1803         substream->group = &substream->self_group;
1804         INIT_LIST_HEAD(&substream->self_group.substreams);
1805         list_add_tail(&substream->link_list, &substream->self_group.substreams);
1806 }
1807
1808 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1809 {
1810         struct snd_pcm_substream *s;
1811         int res = 0;
1812
1813         down_write(&snd_pcm_link_rwsem);
1814         write_lock_irq(&snd_pcm_link_rwlock);
1815         if (!snd_pcm_stream_linked(substream)) {
1816                 res = -EALREADY;
1817                 goto _end;
1818         }
1819         list_del(&substream->link_list);
1820         substream->group->count--;
1821         if (substream->group->count == 1) {     /* detach the last stream, too */
1822                 snd_pcm_group_for_each_entry(s, substream) {
1823                         relink_to_local(s);
1824                         break;
1825                 }
1826                 kfree(substream->group);
1827         }
1828         relink_to_local(substream);
1829        _end:
1830         write_unlock_irq(&snd_pcm_link_rwlock);
1831         up_write(&snd_pcm_link_rwsem);
1832         return res;
1833 }
1834
1835 /*
1836  * hw configurator
1837  */
1838 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1839                                struct snd_pcm_hw_rule *rule)
1840 {
1841         struct snd_interval t;
1842         snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1843                      hw_param_interval_c(params, rule->deps[1]), &t);
1844         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1845 }
1846
1847 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1848                                struct snd_pcm_hw_rule *rule)
1849 {
1850         struct snd_interval t;
1851         snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1852                      hw_param_interval_c(params, rule->deps[1]), &t);
1853         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1854 }
1855
1856 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1857                                    struct snd_pcm_hw_rule *rule)
1858 {
1859         struct snd_interval t;
1860         snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1861                          hw_param_interval_c(params, rule->deps[1]),
1862                          (unsigned long) rule->private, &t);
1863         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1864 }
1865
1866 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1867                                    struct snd_pcm_hw_rule *rule)
1868 {
1869         struct snd_interval t;
1870         snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1871                          (unsigned long) rule->private,
1872                          hw_param_interval_c(params, rule->deps[1]), &t);
1873         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1874 }
1875
1876 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1877                                   struct snd_pcm_hw_rule *rule)
1878 {
1879         unsigned int k;
1880         struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1881         struct snd_mask m;
1882         struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1883         snd_mask_any(&m);
1884         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1885                 int bits;
1886                 if (! snd_mask_test(mask, k))
1887                         continue;
1888                 bits = snd_pcm_format_physical_width(k);
1889                 if (bits <= 0)
1890                         continue; /* ignore invalid formats */
1891                 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1892                         snd_mask_reset(&m, k);
1893         }
1894         return snd_mask_refine(mask, &m);
1895 }
1896
1897 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1898                                        struct snd_pcm_hw_rule *rule)
1899 {
1900         struct snd_interval t;
1901         unsigned int k;
1902         t.min = UINT_MAX;
1903         t.max = 0;
1904         t.openmin = 0;
1905         t.openmax = 0;
1906         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1907                 int bits;
1908                 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1909                         continue;
1910                 bits = snd_pcm_format_physical_width(k);
1911                 if (bits <= 0)
1912                         continue; /* ignore invalid formats */
1913                 if (t.min > (unsigned)bits)
1914                         t.min = bits;
1915                 if (t.max < (unsigned)bits)
1916                         t.max = bits;
1917         }
1918         t.integer = 1;
1919         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1920 }
1921
1922 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1923 #error "Change this table"
1924 #endif
1925
1926 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1927                                  48000, 64000, 88200, 96000, 176400, 192000 };
1928
1929 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1930         .count = ARRAY_SIZE(rates),
1931         .list = rates,
1932 };
1933
1934 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1935                                 struct snd_pcm_hw_rule *rule)
1936 {
1937         struct snd_pcm_hardware *hw = rule->private;
1938         return snd_interval_list(hw_param_interval(params, rule->var),
1939                                  snd_pcm_known_rates.count,
1940                                  snd_pcm_known_rates.list, hw->rates);
1941 }
1942
1943 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1944                                             struct snd_pcm_hw_rule *rule)
1945 {
1946         struct snd_interval t;
1947         struct snd_pcm_substream *substream = rule->private;
1948         t.min = 0;
1949         t.max = substream->buffer_bytes_max;
1950         t.openmin = 0;
1951         t.openmax = 0;
1952         t.integer = 1;
1953         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1954 }
1955
1956 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1957 {
1958         struct snd_pcm_runtime *runtime = substream->runtime;
1959         struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1960         int k, err;
1961
1962         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1963                 snd_mask_any(constrs_mask(constrs, k));
1964         }
1965
1966         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1967                 snd_interval_any(constrs_interval(constrs, k));
1968         }
1969
1970         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1971         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1972         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1973         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1974         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1975
1976         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1977                                    snd_pcm_hw_rule_format, NULL,
1978                                    SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1979         if (err < 0)
1980                 return err;
1981         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1982                                   snd_pcm_hw_rule_sample_bits, NULL,
1983                                   SNDRV_PCM_HW_PARAM_FORMAT,
1984                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1985         if (err < 0)
1986                 return err;
1987         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1988                                   snd_pcm_hw_rule_div, NULL,
1989                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1990         if (err < 0)
1991                 return err;
1992         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1993                                   snd_pcm_hw_rule_mul, NULL,
1994                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1995         if (err < 0)
1996                 return err;
1997         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1998                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1999                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
2000         if (err < 0)
2001                 return err;
2002         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2003                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
2004                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
2005         if (err < 0)
2006                 return err;
2007         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
2008                                   snd_pcm_hw_rule_div, NULL,
2009                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2010         if (err < 0)
2011                 return err;
2012         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2013                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2014                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
2015         if (err < 0)
2016                 return err;
2017         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2018                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2019                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
2020         if (err < 0)
2021                 return err;
2022         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
2023                                   snd_pcm_hw_rule_div, NULL,
2024                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
2025         if (err < 0)
2026                 return err;
2027         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2028                                   snd_pcm_hw_rule_div, NULL,
2029                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2030         if (err < 0)
2031                 return err;
2032         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2033                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
2034                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2035         if (err < 0)
2036                 return err;
2037         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2038                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
2039                                   SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2040         if (err < 0)
2041                 return err;
2042         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2043                                   snd_pcm_hw_rule_mul, NULL,
2044                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2045         if (err < 0)
2046                 return err;
2047         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2048                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
2049                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2050         if (err < 0)
2051                 return err;
2052         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2053                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
2054                                   SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2055         if (err < 0)
2056                 return err;
2057         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2058                                   snd_pcm_hw_rule_muldivk, (void*) 8,
2059                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2060         if (err < 0)
2061                 return err;
2062         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2063                                   snd_pcm_hw_rule_muldivk, (void*) 8,
2064                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2065         if (err < 0)
2066                 return err;
2067         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
2068                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2069                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2070         if (err < 0)
2071                 return err;
2072         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
2073                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2074                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2075         if (err < 0)
2076                 return err;
2077         return 0;
2078 }
2079
2080 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
2081 {
2082         struct snd_pcm_runtime *runtime = substream->runtime;
2083         struct snd_pcm_hardware *hw = &runtime->hw;
2084         int err;
2085         unsigned int mask = 0;
2086
2087         if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
2088                 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
2089         if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
2090                 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
2091         if (hw_support_mmap(substream)) {
2092                 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
2093                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2094                 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
2095                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
2096                 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
2097                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
2098         }
2099         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
2100         if (err < 0)
2101                 return err;
2102
2103         err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
2104         if (err < 0)
2105                 return err;
2106
2107         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
2108         if (err < 0)
2109                 return err;
2110
2111         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
2112                                            hw->channels_min, hw->channels_max);
2113         if (err < 0)
2114                 return err;
2115
2116         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
2117                                            hw->rate_min, hw->rate_max);
2118         if (err < 0)
2119                 return err;
2120
2121         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2122                                            hw->period_bytes_min, hw->period_bytes_max);
2123         if (err < 0)
2124                 return err;
2125
2126         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
2127                                            hw->periods_min, hw->periods_max);
2128         if (err < 0)
2129                 return err;
2130
2131         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2132                                            hw->period_bytes_min, hw->buffer_bytes_max);
2133         if (err < 0)
2134                 return err;
2135
2136         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2137                                   snd_pcm_hw_rule_buffer_bytes_max, substream,
2138                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
2139         if (err < 0)
2140                 return err;
2141
2142         /* FIXME: remove */
2143         if (runtime->dma_bytes) {
2144                 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
2145                 if (err < 0)
2146                         return err;
2147         }
2148
2149         if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
2150                 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2151                                           snd_pcm_hw_rule_rate, hw,
2152                                           SNDRV_PCM_HW_PARAM_RATE, -1);
2153                 if (err < 0)
2154                         return err;
2155         }
2156
2157         /* FIXME: this belong to lowlevel */
2158         snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2159
2160         return 0;
2161 }
2162
2163 static void pcm_release_private(struct snd_pcm_substream *substream)
2164 {
2165         snd_pcm_unlink(substream);
2166 }
2167
2168 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2169 {
2170         substream->ref_count--;
2171         if (substream->ref_count > 0)
2172                 return;
2173
2174         snd_pcm_drop(substream);
2175         if (substream->hw_opened) {
2176                 if (substream->ops->hw_free != NULL)
2177                         substream->ops->hw_free(substream);
2178                 substream->ops->close(substream);
2179                 substream->hw_opened = 0;
2180         }
2181         if (pm_qos_request_active(&substream->latency_pm_qos_req))
2182                 pm_qos_remove_request(&substream->latency_pm_qos_req);
2183         if (substream->pcm_release) {
2184                 substream->pcm_release(substream);
2185                 substream->pcm_release = NULL;
2186         }
2187         snd_pcm_detach_substream(substream);
2188 }
2189
2190 EXPORT_SYMBOL(snd_pcm_release_substream);
2191
2192 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2193                            struct file *file,
2194                            struct snd_pcm_substream **rsubstream)
2195 {
2196         struct snd_pcm_substream *substream;
2197         int err;
2198
2199         err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2200         if (err < 0)
2201                 return err;
2202         if (substream->ref_count > 1) {
2203                 *rsubstream = substream;
2204                 return 0;
2205         }
2206
2207         err = snd_pcm_hw_constraints_init(substream);
2208         if (err < 0) {
2209                 pcm_dbg(pcm, "snd_pcm_hw_constraints_init failed\n");
2210                 goto error;
2211         }
2212
2213         if ((err = substream->ops->open(substream)) < 0)
2214                 goto error;
2215
2216         substream->hw_opened = 1;
2217
2218         err = snd_pcm_hw_constraints_complete(substream);
2219         if (err < 0) {
2220                 pcm_dbg(pcm, "snd_pcm_hw_constraints_complete failed\n");
2221                 goto error;
2222         }
2223
2224         *rsubstream = substream;
2225         return 0;
2226
2227  error:
2228         snd_pcm_release_substream(substream);
2229         return err;
2230 }
2231
2232 EXPORT_SYMBOL(snd_pcm_open_substream);
2233
2234 static int snd_pcm_open_file(struct file *file,
2235                              struct snd_pcm *pcm,
2236                              int stream)
2237 {
2238         struct snd_pcm_file *pcm_file;
2239         struct snd_pcm_substream *substream;
2240         int err;
2241
2242         err = snd_pcm_open_substream(pcm, stream, file, &substream);
2243         if (err < 0)
2244                 return err;
2245
2246         pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2247         if (pcm_file == NULL) {
2248                 snd_pcm_release_substream(substream);
2249                 return -ENOMEM;
2250         }
2251         pcm_file->substream = substream;
2252         if (substream->ref_count == 1) {
2253                 substream->file = pcm_file;
2254                 substream->pcm_release = pcm_release_private;
2255         }
2256         file->private_data = pcm_file;
2257
2258         return 0;
2259 }
2260
2261 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2262 {
2263         struct snd_pcm *pcm;
2264         int err = nonseekable_open(inode, file);
2265         if (err < 0)
2266                 return err;
2267         pcm = snd_lookup_minor_data(iminor(inode),
2268                                     SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2269         err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2270         if (pcm)
2271                 snd_card_unref(pcm->card);
2272         return err;
2273 }
2274
2275 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2276 {
2277         struct snd_pcm *pcm;
2278         int err = nonseekable_open(inode, file);
2279         if (err < 0)
2280                 return err;
2281         pcm = snd_lookup_minor_data(iminor(inode),
2282                                     SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2283         err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2284         if (pcm)
2285                 snd_card_unref(pcm->card);
2286         return err;
2287 }
2288
2289 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2290 {
2291         int err;
2292         wait_queue_t wait;
2293
2294         if (pcm == NULL) {
2295                 err = -ENODEV;
2296                 goto __error1;
2297         }
2298         err = snd_card_file_add(pcm->card, file);
2299         if (err < 0)
2300                 goto __error1;
2301         if (!try_module_get(pcm->card->module)) {
2302                 err = -EFAULT;
2303                 goto __error2;
2304         }
2305         init_waitqueue_entry(&wait, current);
2306         add_wait_queue(&pcm->open_wait, &wait);
2307         mutex_lock(&pcm->open_mutex);
2308         while (1) {
2309                 err = snd_pcm_open_file(file, pcm, stream);
2310                 if (err >= 0)
2311                         break;
2312                 if (err == -EAGAIN) {
2313                         if (file->f_flags & O_NONBLOCK) {
2314                                 err = -EBUSY;
2315                                 break;
2316                         }
2317                 } else
2318                         break;
2319                 set_current_state(TASK_INTERRUPTIBLE);
2320                 mutex_unlock(&pcm->open_mutex);
2321                 schedule();
2322                 mutex_lock(&pcm->open_mutex);
2323                 if (pcm->card->shutdown) {
2324                         err = -ENODEV;
2325                         break;
2326                 }
2327                 if (signal_pending(current)) {
2328                         err = -ERESTARTSYS;
2329                         break;
2330                 }
2331         }
2332         remove_wait_queue(&pcm->open_wait, &wait);
2333         mutex_unlock(&pcm->open_mutex);
2334         if (err < 0)
2335                 goto __error;
2336         return err;
2337
2338       __error:
2339         module_put(pcm->card->module);
2340       __error2:
2341         snd_card_file_remove(pcm->card, file);
2342       __error1:
2343         return err;
2344 }
2345
2346 static int snd_pcm_release(struct inode *inode, struct file *file)
2347 {
2348         struct snd_pcm *pcm;
2349         struct snd_pcm_substream *substream;
2350         struct snd_pcm_file *pcm_file;
2351
2352         pcm_file = file->private_data;
2353         substream = pcm_file->substream;
2354         if (snd_BUG_ON(!substream))
2355                 return -ENXIO;
2356         pcm = substream->pcm;
2357         mutex_lock(&pcm->open_mutex);
2358         snd_pcm_release_substream(substream);
2359         kfree(pcm_file);
2360         mutex_unlock(&pcm->open_mutex);
2361         wake_up(&pcm->open_wait);
2362         module_put(pcm->card->module);
2363         snd_card_file_remove(pcm->card, file);
2364         return 0;
2365 }
2366
2367 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2368                                                  snd_pcm_uframes_t frames)
2369 {
2370         struct snd_pcm_runtime *runtime = substream->runtime;
2371         snd_pcm_sframes_t appl_ptr;
2372         snd_pcm_sframes_t ret;
2373         snd_pcm_sframes_t hw_avail;
2374
2375         if (frames == 0)
2376                 return 0;
2377
2378         snd_pcm_stream_lock_irq(substream);
2379         switch (runtime->status->state) {
2380         case SNDRV_PCM_STATE_PREPARED:
2381                 break;
2382         case SNDRV_PCM_STATE_DRAINING:
2383         case SNDRV_PCM_STATE_RUNNING:
2384                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2385                         break;
2386                 /* Fall through */
2387         case SNDRV_PCM_STATE_XRUN:
2388                 ret = -EPIPE;
2389                 goto __end;
2390         case SNDRV_PCM_STATE_SUSPENDED:
2391                 ret = -ESTRPIPE;
2392                 goto __end;
2393         default:
2394                 ret = -EBADFD;
2395                 goto __end;
2396         }
2397
2398         hw_avail = snd_pcm_playback_hw_avail(runtime);
2399         if (hw_avail <= 0) {
2400                 ret = 0;
2401                 goto __end;
2402         }
2403         if (frames > (snd_pcm_uframes_t)hw_avail)
2404                 frames = hw_avail;
2405         appl_ptr = runtime->control->appl_ptr - frames;
2406         if (appl_ptr < 0)
2407                 appl_ptr += runtime->boundary;
2408         runtime->control->appl_ptr = appl_ptr;
2409         ret = frames;
2410  __end:
2411         snd_pcm_stream_unlock_irq(substream);
2412         return ret;
2413 }
2414
2415 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2416                                                 snd_pcm_uframes_t frames)
2417 {
2418         struct snd_pcm_runtime *runtime = substream->runtime;
2419         snd_pcm_sframes_t appl_ptr;
2420         snd_pcm_sframes_t ret;
2421         snd_pcm_sframes_t hw_avail;
2422
2423         if (frames == 0)
2424                 return 0;
2425
2426         snd_pcm_stream_lock_irq(substream);
2427         switch (runtime->status->state) {
2428         case SNDRV_PCM_STATE_PREPARED:
2429         case SNDRV_PCM_STATE_DRAINING:
2430                 break;
2431         case SNDRV_PCM_STATE_RUNNING:
2432                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2433                         break;
2434                 /* Fall through */
2435         case SNDRV_PCM_STATE_XRUN:
2436                 ret = -EPIPE;
2437                 goto __end;
2438         case SNDRV_PCM_STATE_SUSPENDED:
2439                 ret = -ESTRPIPE;
2440                 goto __end;
2441         default:
2442                 ret = -EBADFD;
2443                 goto __end;
2444         }
2445
2446         hw_avail = snd_pcm_capture_hw_avail(runtime);
2447         if (hw_avail <= 0) {
2448                 ret = 0;
2449                 goto __end;
2450         }
2451         if (frames > (snd_pcm_uframes_t)hw_avail)
2452                 frames = hw_avail;
2453         appl_ptr = runtime->control->appl_ptr - frames;
2454         if (appl_ptr < 0)
2455                 appl_ptr += runtime->boundary;
2456         runtime->control->appl_ptr = appl_ptr;
2457         ret = frames;
2458  __end:
2459         snd_pcm_stream_unlock_irq(substream);
2460         return ret;
2461 }
2462
2463 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2464                                                   snd_pcm_uframes_t frames)
2465 {
2466         struct snd_pcm_runtime *runtime = substream->runtime;
2467         snd_pcm_sframes_t appl_ptr;
2468         snd_pcm_sframes_t ret;
2469         snd_pcm_sframes_t avail;
2470
2471         if (frames == 0)
2472                 return 0;
2473
2474         snd_pcm_stream_lock_irq(substream);
2475         switch (runtime->status->state) {
2476         case SNDRV_PCM_STATE_PREPARED:
2477         case SNDRV_PCM_STATE_PAUSED:
2478                 break;
2479         case SNDRV_PCM_STATE_DRAINING:
2480         case SNDRV_PCM_STATE_RUNNING:
2481                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2482                         break;
2483                 /* Fall through */
2484         case SNDRV_PCM_STATE_XRUN:
2485                 ret = -EPIPE;
2486                 goto __end;
2487         case SNDRV_PCM_STATE_SUSPENDED:
2488                 ret = -ESTRPIPE;
2489                 goto __end;
2490         default:
2491                 ret = -EBADFD;
2492                 goto __end;
2493         }
2494
2495         avail = snd_pcm_playback_avail(runtime);
2496         if (avail <= 0) {
2497                 ret = 0;
2498                 goto __end;
2499         }
2500         if (frames > (snd_pcm_uframes_t)avail)
2501                 frames = avail;
2502         appl_ptr = runtime->control->appl_ptr + frames;
2503         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2504                 appl_ptr -= runtime->boundary;
2505         runtime->control->appl_ptr = appl_ptr;
2506         ret = frames;
2507  __end:
2508         snd_pcm_stream_unlock_irq(substream);
2509         return ret;
2510 }
2511
2512 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2513                                                  snd_pcm_uframes_t frames)
2514 {
2515         struct snd_pcm_runtime *runtime = substream->runtime;
2516         snd_pcm_sframes_t appl_ptr;
2517         snd_pcm_sframes_t ret;
2518         snd_pcm_sframes_t avail;
2519
2520         if (frames == 0)
2521                 return 0;
2522
2523         snd_pcm_stream_lock_irq(substream);
2524         switch (runtime->status->state) {
2525         case SNDRV_PCM_STATE_PREPARED:
2526         case SNDRV_PCM_STATE_DRAINING:
2527         case SNDRV_PCM_STATE_PAUSED:
2528                 break;
2529         case SNDRV_PCM_STATE_RUNNING:
2530                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2531                         break;
2532                 /* Fall through */
2533         case SNDRV_PCM_STATE_XRUN:
2534                 ret = -EPIPE;
2535                 goto __end;
2536         case SNDRV_PCM_STATE_SUSPENDED:
2537                 ret = -ESTRPIPE;
2538                 goto __end;
2539         default:
2540                 ret = -EBADFD;
2541                 goto __end;
2542         }
2543
2544         avail = snd_pcm_capture_avail(runtime);
2545         if (avail <= 0) {
2546                 ret = 0;
2547                 goto __end;
2548         }
2549         if (frames > (snd_pcm_uframes_t)avail)
2550                 frames = avail;
2551         appl_ptr = runtime->control->appl_ptr + frames;
2552         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2553                 appl_ptr -= runtime->boundary;
2554         runtime->control->appl_ptr = appl_ptr;
2555         ret = frames;
2556  __end:
2557         snd_pcm_stream_unlock_irq(substream);
2558         return ret;
2559 }
2560
2561 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2562 {
2563         struct snd_pcm_runtime *runtime = substream->runtime;
2564         int err;
2565
2566         snd_pcm_stream_lock_irq(substream);
2567         switch (runtime->status->state) {
2568         case SNDRV_PCM_STATE_DRAINING:
2569                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2570                         goto __badfd;
2571                 /* Fall through */
2572         case SNDRV_PCM_STATE_RUNNING:
2573                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2574                         break;
2575                 /* Fall through */
2576         case SNDRV_PCM_STATE_PREPARED:
2577         case SNDRV_PCM_STATE_SUSPENDED:
2578                 err = 0;
2579                 break;
2580         case SNDRV_PCM_STATE_XRUN:
2581                 err = -EPIPE;
2582                 break;
2583         default:
2584               __badfd:
2585                 err = -EBADFD;
2586                 break;
2587         }
2588         snd_pcm_stream_unlock_irq(substream);
2589         return err;
2590 }
2591
2592 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2593                          snd_pcm_sframes_t __user *res)
2594 {
2595         struct snd_pcm_runtime *runtime = substream->runtime;
2596         int err;
2597         snd_pcm_sframes_t n = 0;
2598
2599         snd_pcm_stream_lock_irq(substream);
2600         switch (runtime->status->state) {
2601         case SNDRV_PCM_STATE_DRAINING:
2602                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2603                         goto __badfd;
2604                 /* Fall through */
2605         case SNDRV_PCM_STATE_RUNNING:
2606                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2607                         break;
2608                 /* Fall through */
2609         case SNDRV_PCM_STATE_PREPARED:
2610         case SNDRV_PCM_STATE_SUSPENDED:
2611                 err = 0;
2612                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2613                         n = snd_pcm_playback_hw_avail(runtime);
2614                 else
2615                         n = snd_pcm_capture_avail(runtime);
2616                 n += runtime->delay;
2617                 break;
2618         case SNDRV_PCM_STATE_XRUN:
2619                 err = -EPIPE;
2620                 break;
2621         default:
2622               __badfd:
2623                 err = -EBADFD;
2624                 break;
2625         }
2626         snd_pcm_stream_unlock_irq(substream);
2627         if (!err)
2628                 if (put_user(n, res))
2629                         err = -EFAULT;
2630         return err;
2631 }
2632
2633 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2634                             struct snd_pcm_sync_ptr __user *_sync_ptr)
2635 {
2636         struct snd_pcm_runtime *runtime = substream->runtime;
2637         struct snd_pcm_sync_ptr sync_ptr;
2638         volatile struct snd_pcm_mmap_status *status;
2639         volatile struct snd_pcm_mmap_control *control;
2640         int err;
2641
2642         memset(&sync_ptr, 0, sizeof(sync_ptr));
2643         if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2644                 return -EFAULT;
2645         if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2646                 return -EFAULT;
2647         status = runtime->status;
2648         control = runtime->control;
2649         if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2650                 err = snd_pcm_hwsync(substream);
2651                 if (err < 0)
2652                         return err;
2653         }
2654         snd_pcm_stream_lock_irq(substream);
2655         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2656                 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2657         else
2658                 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2659         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2660                 control->avail_min = sync_ptr.c.control.avail_min;
2661         else
2662                 sync_ptr.c.control.avail_min = control->avail_min;
2663         sync_ptr.s.status.state = status->state;
2664         sync_ptr.s.status.hw_ptr = status->hw_ptr;
2665         sync_ptr.s.status.tstamp = status->tstamp;
2666         sync_ptr.s.status.suspended_state = status->suspended_state;
2667         snd_pcm_stream_unlock_irq(substream);
2668         if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2669                 return -EFAULT;
2670         return 0;
2671 }
2672
2673 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2674 {
2675         struct snd_pcm_runtime *runtime = substream->runtime;
2676         int arg;
2677
2678         if (get_user(arg, _arg))
2679                 return -EFAULT;
2680         if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2681                 return -EINVAL;
2682         runtime->tstamp_type = arg;
2683         return 0;
2684 }
2685
2686 static int snd_pcm_common_ioctl1(struct file *file,
2687                                  struct snd_pcm_substream *substream,
2688                                  unsigned int cmd, void __user *arg)
2689 {
2690         switch (cmd) {
2691         case SNDRV_PCM_IOCTL_PVERSION:
2692                 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2693         case SNDRV_PCM_IOCTL_INFO:
2694                 return snd_pcm_info_user(substream, arg);
2695         case SNDRV_PCM_IOCTL_TSTAMP:    /* just for compatibility */
2696                 return 0;
2697         case SNDRV_PCM_IOCTL_TTSTAMP:
2698                 return snd_pcm_tstamp(substream, arg);
2699         case SNDRV_PCM_IOCTL_HW_REFINE:
2700                 return snd_pcm_hw_refine_user(substream, arg);
2701         case SNDRV_PCM_IOCTL_HW_PARAMS:
2702                 return snd_pcm_hw_params_user(substream, arg);
2703         case SNDRV_PCM_IOCTL_HW_FREE:
2704                 return snd_pcm_hw_free(substream);
2705         case SNDRV_PCM_IOCTL_SW_PARAMS:
2706                 return snd_pcm_sw_params_user(substream, arg);
2707         case SNDRV_PCM_IOCTL_STATUS:
2708                 return snd_pcm_status_user(substream, arg);
2709         case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2710                 return snd_pcm_channel_info_user(substream, arg);
2711         case SNDRV_PCM_IOCTL_PREPARE:
2712                 return snd_pcm_prepare(substream, file);
2713         case SNDRV_PCM_IOCTL_RESET:
2714                 return snd_pcm_reset(substream);
2715         case SNDRV_PCM_IOCTL_START:
2716                 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2717         case SNDRV_PCM_IOCTL_LINK:
2718                 return snd_pcm_link(substream, (int)(unsigned long) arg);
2719         case SNDRV_PCM_IOCTL_UNLINK:
2720                 return snd_pcm_unlink(substream);
2721         case SNDRV_PCM_IOCTL_RESUME:
2722                 return snd_pcm_resume(substream);
2723         case SNDRV_PCM_IOCTL_XRUN:
2724                 return snd_pcm_xrun(substream);
2725         case SNDRV_PCM_IOCTL_HWSYNC:
2726                 return snd_pcm_hwsync(substream);
2727         case SNDRV_PCM_IOCTL_DELAY:
2728                 return snd_pcm_delay(substream, arg);
2729         case SNDRV_PCM_IOCTL_SYNC_PTR:
2730                 return snd_pcm_sync_ptr(substream, arg);
2731 #ifdef CONFIG_SND_SUPPORT_OLD_API
2732         case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2733                 return snd_pcm_hw_refine_old_user(substream, arg);
2734         case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2735                 return snd_pcm_hw_params_old_user(substream, arg);
2736 #endif
2737         case SNDRV_PCM_IOCTL_DRAIN:
2738                 return snd_pcm_drain(substream, file);
2739         case SNDRV_PCM_IOCTL_DROP:
2740                 return snd_pcm_drop(substream);
2741         case SNDRV_PCM_IOCTL_PAUSE:
2742         {
2743                 int res;
2744                 snd_pcm_stream_lock_irq(substream);
2745                 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2746                 snd_pcm_stream_unlock_irq(substream);
2747                 return res;
2748         }
2749         }
2750         pcm_dbg(substream->pcm, "unknown ioctl = 0x%x\n", cmd);
2751         return -ENOTTY;
2752 }
2753
2754 static int snd_pcm_playback_ioctl1(struct file *file,
2755                                    struct snd_pcm_substream *substream,
2756                                    unsigned int cmd, void __user *arg)
2757 {
2758         if (snd_BUG_ON(!substream))
2759                 return -ENXIO;
2760         if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2761                 return -EINVAL;
2762         switch (cmd) {
2763         case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2764         {
2765                 struct snd_xferi xferi;
2766                 struct snd_xferi __user *_xferi = arg;
2767                 struct snd_pcm_runtime *runtime = substream->runtime;
2768                 snd_pcm_sframes_t result;
2769                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2770                         return -EBADFD;
2771                 if (put_user(0, &_xferi->result))
2772                         return -EFAULT;
2773                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2774                         return -EFAULT;
2775                 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2776                 __put_user(result, &_xferi->result);
2777                 return result < 0 ? result : 0;
2778         }
2779         case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2780         {
2781                 struct snd_xfern xfern;
2782                 struct snd_xfern __user *_xfern = arg;
2783                 struct snd_pcm_runtime *runtime = substream->runtime;
2784                 void __user **bufs;
2785                 snd_pcm_sframes_t result;
2786                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2787                         return -EBADFD;
2788                 if (runtime->channels > 128)
2789                         return -EINVAL;
2790                 if (put_user(0, &_xfern->result))
2791                         return -EFAULT;
2792                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2793                         return -EFAULT;
2794
2795                 bufs = memdup_user(xfern.bufs,
2796                                    sizeof(void *) * runtime->channels);
2797                 if (IS_ERR(bufs))
2798                         return PTR_ERR(bufs);
2799                 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2800                 kfree(bufs);
2801                 __put_user(result, &_xfern->result);
2802                 return result < 0 ? result : 0;
2803         }
2804         case SNDRV_PCM_IOCTL_REWIND:
2805         {
2806                 snd_pcm_uframes_t frames;
2807                 snd_pcm_uframes_t __user *_frames = arg;
2808                 snd_pcm_sframes_t result;
2809                 if (get_user(frames, _frames))
2810                         return -EFAULT;
2811                 if (put_user(0, _frames))
2812                         return -EFAULT;
2813                 result = snd_pcm_playback_rewind(substream, frames);
2814                 __put_user(result, _frames);
2815                 return result < 0 ? result : 0;
2816         }
2817         case SNDRV_PCM_IOCTL_FORWARD:
2818         {
2819                 snd_pcm_uframes_t frames;
2820                 snd_pcm_uframes_t __user *_frames = arg;
2821                 snd_pcm_sframes_t result;
2822                 if (get_user(frames, _frames))
2823                         return -EFAULT;
2824                 if (put_user(0, _frames))
2825                         return -EFAULT;
2826                 result = snd_pcm_playback_forward(substream, frames);
2827                 __put_user(result, _frames);
2828                 return result < 0 ? result : 0;
2829         }
2830         }
2831         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2832 }
2833
2834 static int snd_pcm_capture_ioctl1(struct file *file,
2835                                   struct snd_pcm_substream *substream,
2836                                   unsigned int cmd, void __user *arg)
2837 {
2838         if (snd_BUG_ON(!substream))
2839                 return -ENXIO;
2840         if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2841                 return -EINVAL;
2842         switch (cmd) {
2843         case SNDRV_PCM_IOCTL_READI_FRAMES:
2844         {
2845                 struct snd_xferi xferi;
2846                 struct snd_xferi __user *_xferi = arg;
2847                 struct snd_pcm_runtime *runtime = substream->runtime;
2848                 snd_pcm_sframes_t result;
2849                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2850                         return -EBADFD;
2851                 if (put_user(0, &_xferi->result))
2852                         return -EFAULT;
2853                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2854                         return -EFAULT;
2855                 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2856                 __put_user(result, &_xferi->result);
2857                 return result < 0 ? result : 0;
2858         }
2859         case SNDRV_PCM_IOCTL_READN_FRAMES:
2860         {
2861                 struct snd_xfern xfern;
2862                 struct snd_xfern __user *_xfern = arg;
2863                 struct snd_pcm_runtime *runtime = substream->runtime;
2864                 void *bufs;
2865                 snd_pcm_sframes_t result;
2866                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2867                         return -EBADFD;
2868                 if (runtime->channels > 128)
2869                         return -EINVAL;
2870                 if (put_user(0, &_xfern->result))
2871                         return -EFAULT;
2872                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2873                         return -EFAULT;
2874
2875                 bufs = memdup_user(xfern.bufs,
2876                                    sizeof(void *) * runtime->channels);
2877                 if (IS_ERR(bufs))
2878                         return PTR_ERR(bufs);
2879                 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2880                 kfree(bufs);
2881                 __put_user(result, &_xfern->result);
2882                 return result < 0 ? result : 0;
2883         }
2884         case SNDRV_PCM_IOCTL_REWIND:
2885         {
2886                 snd_pcm_uframes_t frames;
2887                 snd_pcm_uframes_t __user *_frames = arg;
2888                 snd_pcm_sframes_t result;
2889                 if (get_user(frames, _frames))
2890                         return -EFAULT;
2891                 if (put_user(0, _frames))
2892                         return -EFAULT;
2893                 result = snd_pcm_capture_rewind(substream, frames);
2894                 __put_user(result, _frames);
2895                 return result < 0 ? result : 0;
2896         }
2897         case SNDRV_PCM_IOCTL_FORWARD:
2898         {
2899                 snd_pcm_uframes_t frames;
2900                 snd_pcm_uframes_t __user *_frames = arg;
2901                 snd_pcm_sframes_t result;
2902                 if (get_user(frames, _frames))
2903                         return -EFAULT;
2904                 if (put_user(0, _frames))
2905                         return -EFAULT;
2906                 result = snd_pcm_capture_forward(substream, frames);
2907                 __put_user(result, _frames);
2908                 return result < 0 ? result : 0;
2909         }
2910         }
2911         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2912 }
2913
2914 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2915                                    unsigned long arg)
2916 {
2917         struct snd_pcm_file *pcm_file;
2918
2919         pcm_file = file->private_data;
2920
2921         if (((cmd >> 8) & 0xff) != 'A')
2922                 return -ENOTTY;
2923
2924         return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2925                                        (void __user *)arg);
2926 }
2927
2928 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2929                                   unsigned long arg)
2930 {
2931         struct snd_pcm_file *pcm_file;
2932
2933         pcm_file = file->private_data;
2934
2935         if (((cmd >> 8) & 0xff) != 'A')
2936                 return -ENOTTY;
2937
2938         return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2939                                       (void __user *)arg);
2940 }
2941
2942 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2943                          unsigned int cmd, void *arg)
2944 {
2945         mm_segment_t fs;
2946         int result;
2947
2948         fs = snd_enter_user();
2949         switch (substream->stream) {
2950         case SNDRV_PCM_STREAM_PLAYBACK:
2951                 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2952                                                  (void __user *)arg);
2953                 break;
2954         case SNDRV_PCM_STREAM_CAPTURE:
2955                 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2956                                                 (void __user *)arg);
2957                 break;
2958         default:
2959                 result = -EINVAL;
2960                 break;
2961         }
2962         snd_leave_user(fs);
2963         return result;
2964 }
2965
2966 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2967
2968 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2969                             loff_t * offset)
2970 {
2971         struct snd_pcm_file *pcm_file;
2972         struct snd_pcm_substream *substream;
2973         struct snd_pcm_runtime *runtime;
2974         snd_pcm_sframes_t result;
2975
2976         pcm_file = file->private_data;
2977         substream = pcm_file->substream;
2978         if (PCM_RUNTIME_CHECK(substream))
2979                 return -ENXIO;
2980         runtime = substream->runtime;
2981         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2982                 return -EBADFD;
2983         if (!frame_aligned(runtime, count))
2984                 return -EINVAL;
2985         count = bytes_to_frames(runtime, count);
2986         result = snd_pcm_lib_read(substream, buf, count);
2987         if (result > 0)
2988                 result = frames_to_bytes(runtime, result);
2989         return result;
2990 }
2991
2992 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2993                              size_t count, loff_t * offset)
2994 {
2995         struct snd_pcm_file *pcm_file;
2996         struct snd_pcm_substream *substream;
2997         struct snd_pcm_runtime *runtime;
2998         snd_pcm_sframes_t result;
2999
3000         pcm_file = file->private_data;
3001         substream = pcm_file->substream;
3002         if (PCM_RUNTIME_CHECK(substream))
3003                 return -ENXIO;
3004         runtime = substream->runtime;
3005         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3006                 return -EBADFD;
3007         if (!frame_aligned(runtime, count))
3008                 return -EINVAL;
3009         count = bytes_to_frames(runtime, count);
3010         result = snd_pcm_lib_write(substream, buf, count);
3011         if (result > 0)
3012                 result = frames_to_bytes(runtime, result);
3013         return result;
3014 }
3015
3016 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
3017                              unsigned long nr_segs, loff_t pos)
3018
3019 {
3020         struct snd_pcm_file *pcm_file;
3021         struct snd_pcm_substream *substream;
3022         struct snd_pcm_runtime *runtime;
3023         snd_pcm_sframes_t result;
3024         unsigned long i;
3025         void __user **bufs;
3026         snd_pcm_uframes_t frames;
3027
3028         pcm_file = iocb->ki_filp->private_data;
3029         substream = pcm_file->substream;
3030         if (PCM_RUNTIME_CHECK(substream))
3031                 return -ENXIO;
3032         runtime = substream->runtime;
3033         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3034                 return -EBADFD;
3035         if (nr_segs > 1024 || nr_segs != runtime->channels)
3036                 return -EINVAL;
3037         if (!frame_aligned(runtime, iov->iov_len))
3038                 return -EINVAL;
3039         frames = bytes_to_samples(runtime, iov->iov_len);
3040         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
3041         if (bufs == NULL)
3042                 return -ENOMEM;
3043         for (i = 0; i < nr_segs; ++i)
3044                 bufs[i] = iov[i].iov_base;
3045         result = snd_pcm_lib_readv(substream, bufs, frames);
3046         if (result > 0)
3047                 result = frames_to_bytes(runtime, result);
3048         kfree(bufs);
3049         return result;
3050 }
3051
3052 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
3053                               unsigned long nr_segs, loff_t pos)
3054 {
3055         struct snd_pcm_file *pcm_file;
3056         struct snd_pcm_substream *substream;
3057         struct snd_pcm_runtime *runtime;
3058         snd_pcm_sframes_t result;
3059         unsigned long i;
3060         void __user **bufs;
3061         snd_pcm_uframes_t frames;
3062
3063         pcm_file = iocb->ki_filp->private_data;
3064         substream = pcm_file->substream;
3065         if (PCM_RUNTIME_CHECK(substream))
3066                 return -ENXIO;
3067         runtime = substream->runtime;
3068         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3069                 return -EBADFD;
3070         if (nr_segs > 128 || nr_segs != runtime->channels ||
3071             !frame_aligned(runtime, iov->iov_len))
3072                 return -EINVAL;
3073         frames = bytes_to_samples(runtime, iov->iov_len);
3074         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
3075         if (bufs == NULL)
3076                 return -ENOMEM;
3077         for (i = 0; i < nr_segs; ++i)
3078                 bufs[i] = iov[i].iov_base;
3079         result = snd_pcm_lib_writev(substream, bufs, frames);
3080         if (result > 0)
3081                 result = frames_to_bytes(runtime, result);
3082         kfree(bufs);
3083         return result;
3084 }
3085
3086 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
3087 {
3088         struct snd_pcm_file *pcm_file;
3089         struct snd_pcm_substream *substream;
3090         struct snd_pcm_runtime *runtime;
3091         unsigned int mask;
3092         snd_pcm_uframes_t avail;
3093
3094         pcm_file = file->private_data;
3095
3096         substream = pcm_file->substream;
3097         if (PCM_RUNTIME_CHECK(substream))
3098                 return -ENXIO;
3099         runtime = substream->runtime;
3100
3101         poll_wait(file, &runtime->sleep, wait);
3102
3103         snd_pcm_stream_lock_irq(substream);
3104         avail = snd_pcm_playback_avail(runtime);
3105         switch (runtime->status->state) {
3106         case SNDRV_PCM_STATE_RUNNING:
3107         case SNDRV_PCM_STATE_PREPARED:
3108         case SNDRV_PCM_STATE_PAUSED:
3109                 if (avail >= runtime->control->avail_min) {
3110                         mask = POLLOUT | POLLWRNORM;
3111                         break;
3112                 }
3113                 /* Fall through */
3114         case SNDRV_PCM_STATE_DRAINING:
3115                 mask = 0;
3116                 break;
3117         default:
3118                 mask = POLLOUT | POLLWRNORM | POLLERR;
3119                 break;
3120         }
3121         snd_pcm_stream_unlock_irq(substream);
3122         return mask;
3123 }
3124
3125 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
3126 {
3127         struct snd_pcm_file *pcm_file;
3128         struct snd_pcm_substream *substream;
3129         struct snd_pcm_runtime *runtime;
3130         unsigned int mask;
3131         snd_pcm_uframes_t avail;
3132
3133         pcm_file = file->private_data;
3134
3135         substream = pcm_file->substream;
3136         if (PCM_RUNTIME_CHECK(substream))
3137                 return -ENXIO;
3138         runtime = substream->runtime;
3139
3140         poll_wait(file, &runtime->sleep, wait);
3141
3142         snd_pcm_stream_lock_irq(substream);
3143         avail = snd_pcm_capture_avail(runtime);
3144         switch (runtime->status->state) {
3145         case SNDRV_PCM_STATE_RUNNING:
3146         case SNDRV_PCM_STATE_PREPARED:
3147         case SNDRV_PCM_STATE_PAUSED:
3148                 if (avail >= runtime->control->avail_min) {
3149                         mask = POLLIN | POLLRDNORM;
3150                         break;
3151                 }
3152                 mask = 0;
3153                 break;
3154         case SNDRV_PCM_STATE_DRAINING:
3155                 if (avail > 0) {
3156                         mask = POLLIN | POLLRDNORM;
3157                         break;
3158                 }
3159                 /* Fall through */
3160         default:
3161                 mask = POLLIN | POLLRDNORM | POLLERR;
3162                 break;
3163         }
3164         snd_pcm_stream_unlock_irq(substream);
3165         return mask;
3166 }
3167
3168 /*
3169  * mmap support
3170  */
3171
3172 /*
3173  * Only on coherent architectures, we can mmap the status and the control records
3174  * for effcient data transfer.  On others, we have to use HWSYNC ioctl...
3175  */
3176 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3177 /*
3178  * mmap status record
3179  */
3180 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
3181                                                 struct vm_fault *vmf)
3182 {
3183         struct snd_pcm_substream *substream = area->vm_private_data;
3184         struct snd_pcm_runtime *runtime;
3185
3186         if (substream == NULL)
3187                 return VM_FAULT_SIGBUS;
3188         runtime = substream->runtime;
3189         vmf->page = virt_to_page(runtime->status);
3190         get_page(vmf->page);
3191         return 0;
3192 }
3193
3194 static const struct vm_operations_struct snd_pcm_vm_ops_status =
3195 {
3196         .fault =        snd_pcm_mmap_status_fault,
3197 };
3198
3199 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3200                                struct vm_area_struct *area)
3201 {
3202         long size;
3203         if (!(area->vm_flags & VM_READ))
3204                 return -EINVAL;
3205         size = area->vm_end - area->vm_start;
3206         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3207                 return -EINVAL;
3208         area->vm_ops = &snd_pcm_vm_ops_status;
3209         area->vm_private_data = substream;
3210         area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3211         return 0;
3212 }
3213
3214 /*
3215  * mmap control record
3216  */
3217 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3218                                                 struct vm_fault *vmf)
3219 {
3220         struct snd_pcm_substream *substream = area->vm_private_data;
3221         struct snd_pcm_runtime *runtime;
3222
3223         if (substream == NULL)
3224                 return VM_FAULT_SIGBUS;
3225         runtime = substream->runtime;
3226         vmf->page = virt_to_page(runtime->control);
3227         get_page(vmf->page);
3228         return 0;
3229 }
3230
3231 static const struct vm_operations_struct snd_pcm_vm_ops_control =
3232 {
3233         .fault =        snd_pcm_mmap_control_fault,
3234 };
3235
3236 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3237                                 struct vm_area_struct *area)
3238 {
3239         long size;
3240         if (!(area->vm_flags & VM_READ))
3241                 return -EINVAL;
3242         size = area->vm_end - area->vm_start;
3243         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3244                 return -EINVAL;
3245         area->vm_ops = &snd_pcm_vm_ops_control;
3246         area->vm_private_data = substream;
3247         area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3248         return 0;
3249 }
3250 #else /* ! coherent mmap */
3251 /*
3252  * don't support mmap for status and control records.
3253  */
3254 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3255                                struct vm_area_struct *area)
3256 {
3257         return -ENXIO;
3258 }
3259 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3260                                 struct vm_area_struct *area)
3261 {
3262         return -ENXIO;
3263 }
3264 #endif /* coherent mmap */
3265
3266 static inline struct page *
3267 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3268 {
3269         void *vaddr = substream->runtime->dma_area + ofs;
3270         return virt_to_page(vaddr);
3271 }
3272
3273 /*
3274  * fault callback for mmapping a RAM page
3275  */
3276 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3277                                                 struct vm_fault *vmf)
3278 {
3279         struct snd_pcm_substream *substream = area->vm_private_data;
3280         struct snd_pcm_runtime *runtime;
3281         unsigned long offset;
3282         struct page * page;
3283         size_t dma_bytes;
3284
3285         if (substream == NULL)
3286                 return VM_FAULT_SIGBUS;
3287         runtime = substream->runtime;
3288         offset = vmf->pgoff << PAGE_SHIFT;
3289         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3290         if (offset > dma_bytes - PAGE_SIZE)
3291                 return VM_FAULT_SIGBUS;
3292         if (substream->ops->page)
3293                 page = substream->ops->page(substream, offset);
3294         else
3295                 page = snd_pcm_default_page_ops(substream, offset);
3296         if (!page)
3297                 return VM_FAULT_SIGBUS;
3298         get_page(page);
3299         vmf->page = page;
3300         return 0;
3301 }
3302
3303 static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3304         .open =         snd_pcm_mmap_data_open,
3305         .close =        snd_pcm_mmap_data_close,
3306 };
3307
3308 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
3309         .open =         snd_pcm_mmap_data_open,
3310         .close =        snd_pcm_mmap_data_close,
3311         .fault =        snd_pcm_mmap_data_fault,
3312 };
3313
3314 /*
3315  * mmap the DMA buffer on RAM
3316  */
3317 int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
3318                              struct vm_area_struct *area)
3319 {
3320         area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3321 #ifdef CONFIG_GENERIC_ALLOCATOR
3322         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_IRAM) {
3323                 area->vm_page_prot = pgprot_writecombine(area->vm_page_prot);
3324                 return remap_pfn_range(area, area->vm_start,
3325                                 substream->dma_buffer.addr >> PAGE_SHIFT,
3326                                 area->vm_end - area->vm_start, area->vm_page_prot);
3327         }
3328 #endif /* CONFIG_GENERIC_ALLOCATOR */
3329         if (!substream->ops->page &&
3330             substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3331                 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3332                                          area,
3333                                          substream->runtime->dma_area,
3334                                          substream->runtime->dma_addr,
3335                                          area->vm_end - area->vm_start);
3336         /* mmap with fault handler */
3337         area->vm_ops = &snd_pcm_vm_ops_data_fault;
3338         return 0;
3339 }
3340 EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
3341
3342 /*
3343  * mmap the DMA buffer on I/O memory area
3344  */
3345 #if SNDRV_PCM_INFO_MMAP_IOMEM
3346 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3347                            struct vm_area_struct *area)
3348 {
3349         struct snd_pcm_runtime *runtime = substream->runtime;;
3350
3351         area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3352         return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes);
3353 }
3354
3355 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3356 #endif /* SNDRV_PCM_INFO_MMAP */
3357
3358 /*
3359  * mmap DMA buffer
3360  */
3361 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3362                       struct vm_area_struct *area)
3363 {
3364         struct snd_pcm_runtime *runtime;
3365         long size;
3366         unsigned long offset;
3367         size_t dma_bytes;
3368         int err;
3369
3370         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3371                 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3372                         return -EINVAL;
3373         } else {
3374                 if (!(area->vm_flags & VM_READ))
3375                         return -EINVAL;
3376         }
3377         runtime = substream->runtime;
3378         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3379                 return -EBADFD;
3380         if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3381                 return -ENXIO;
3382         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3383             runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3384                 return -EINVAL;
3385         size = area->vm_end - area->vm_start;
3386         offset = area->vm_pgoff << PAGE_SHIFT;
3387         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3388         if ((size_t)size > dma_bytes)
3389                 return -EINVAL;
3390         if (offset > dma_bytes - size)
3391                 return -EINVAL;
3392
3393         area->vm_ops = &snd_pcm_vm_ops_data;
3394         area->vm_private_data = substream;
3395         if (substream->ops->mmap)
3396                 err = substream->ops->mmap(substream, area);
3397         else
3398                 err = snd_pcm_lib_default_mmap(substream, area);
3399         if (!err)
3400                 atomic_inc(&substream->mmap_count);
3401         return err;
3402 }
3403
3404 EXPORT_SYMBOL(snd_pcm_mmap_data);
3405
3406 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3407 {
3408         struct snd_pcm_file * pcm_file;
3409         struct snd_pcm_substream *substream;
3410         unsigned long offset;
3411
3412         pcm_file = file->private_data;
3413         substream = pcm_file->substream;
3414         if (PCM_RUNTIME_CHECK(substream))
3415                 return -ENXIO;
3416
3417         offset = area->vm_pgoff << PAGE_SHIFT;
3418         switch (offset) {
3419         case SNDRV_PCM_MMAP_OFFSET_STATUS:
3420                 if (pcm_file->no_compat_mmap)
3421                         return -ENXIO;
3422                 return snd_pcm_mmap_status(substream, file, area);
3423         case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3424                 if (pcm_file->no_compat_mmap)
3425                         return -ENXIO;
3426                 return snd_pcm_mmap_control(substream, file, area);
3427         default:
3428                 return snd_pcm_mmap_data(substream, file, area);
3429         }
3430         return 0;
3431 }
3432
3433 static int snd_pcm_fasync(int fd, struct file * file, int on)
3434 {
3435         struct snd_pcm_file * pcm_file;
3436         struct snd_pcm_substream *substream;
3437         struct snd_pcm_runtime *runtime;
3438
3439         pcm_file = file->private_data;
3440         substream = pcm_file->substream;
3441         if (PCM_RUNTIME_CHECK(substream))
3442                 return -ENXIO;
3443         runtime = substream->runtime;
3444         return fasync_helper(fd, file, on, &runtime->fasync);
3445 }
3446
3447 /*
3448  * ioctl32 compat
3449  */
3450 #ifdef CONFIG_COMPAT
3451 #include "pcm_compat.c"
3452 #else
3453 #define snd_pcm_ioctl_compat    NULL
3454 #endif
3455
3456 /*
3457  *  To be removed helpers to keep binary compatibility
3458  */
3459
3460 #ifdef CONFIG_SND_SUPPORT_OLD_API
3461 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3462 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3463
3464 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3465                                                struct snd_pcm_hw_params_old *oparams)
3466 {
3467         unsigned int i;
3468
3469         memset(params, 0, sizeof(*params));
3470         params->flags = oparams->flags;
3471         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3472                 params->masks[i].bits[0] = oparams->masks[i];
3473         memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3474         params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3475         params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3476         params->info = oparams->info;
3477         params->msbits = oparams->msbits;
3478         params->rate_num = oparams->rate_num;
3479         params->rate_den = oparams->rate_den;
3480         params->fifo_size = oparams->fifo_size;
3481 }
3482
3483 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3484                                              struct snd_pcm_hw_params *params)
3485 {
3486         unsigned int i;
3487
3488         memset(oparams, 0, sizeof(*oparams));
3489         oparams->flags = params->flags;
3490         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3491                 oparams->masks[i] = params->masks[i].bits[0];
3492         memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3493         oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3494         oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3495         oparams->info = params->info;
3496         oparams->msbits = params->msbits;
3497         oparams->rate_num = params->rate_num;
3498         oparams->rate_den = params->rate_den;
3499         oparams->fifo_size = params->fifo_size;
3500 }
3501
3502 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3503                                       struct snd_pcm_hw_params_old __user * _oparams)
3504 {
3505         struct snd_pcm_hw_params *params;
3506         struct snd_pcm_hw_params_old *oparams = NULL;
3507         int err;
3508
3509         params = kmalloc(sizeof(*params), GFP_KERNEL);
3510         if (!params)
3511                 return -ENOMEM;
3512
3513         oparams = memdup_user(_oparams, sizeof(*oparams));
3514         if (IS_ERR(oparams)) {
3515                 err = PTR_ERR(oparams);
3516                 goto out;
3517         }
3518         snd_pcm_hw_convert_from_old_params(params, oparams);
3519         err = snd_pcm_hw_refine(substream, params);
3520         snd_pcm_hw_convert_to_old_params(oparams, params);
3521         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3522                 if (!err)
3523                         err = -EFAULT;
3524         }
3525
3526         kfree(oparams);
3527 out:
3528         kfree(params);
3529         return err;
3530 }
3531
3532 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3533                                       struct snd_pcm_hw_params_old __user * _oparams)
3534 {
3535         struct snd_pcm_hw_params *params;
3536         struct snd_pcm_hw_params_old *oparams = NULL;
3537         int err;
3538
3539         params = kmalloc(sizeof(*params), GFP_KERNEL);
3540         if (!params)
3541                 return -ENOMEM;
3542
3543         oparams = memdup_user(_oparams, sizeof(*oparams));
3544         if (IS_ERR(oparams)) {
3545                 err = PTR_ERR(oparams);
3546                 goto out;
3547         }
3548         snd_pcm_hw_convert_from_old_params(params, oparams);
3549         err = snd_pcm_hw_params(substream, params);
3550         snd_pcm_hw_convert_to_old_params(oparams, params);
3551         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3552                 if (!err)
3553                         err = -EFAULT;
3554         }
3555
3556         kfree(oparams);
3557 out:
3558         kfree(params);
3559         return err;
3560 }
3561 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3562
3563 #ifndef CONFIG_MMU
3564 static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3565                                                unsigned long addr,
3566                                                unsigned long len,
3567                                                unsigned long pgoff,
3568                                                unsigned long flags)
3569 {
3570         struct snd_pcm_file *pcm_file = file->private_data;
3571         struct snd_pcm_substream *substream = pcm_file->substream;
3572         struct snd_pcm_runtime *runtime = substream->runtime;
3573         unsigned long offset = pgoff << PAGE_SHIFT;
3574
3575         switch (offset) {
3576         case SNDRV_PCM_MMAP_OFFSET_STATUS:
3577                 return (unsigned long)runtime->status;
3578         case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3579                 return (unsigned long)runtime->control;
3580         default:
3581                 return (unsigned long)runtime->dma_area + offset;
3582         }
3583 }
3584 #else
3585 # define snd_pcm_get_unmapped_area NULL
3586 #endif
3587
3588 /*
3589  *  Register section
3590  */
3591
3592 const struct file_operations snd_pcm_f_ops[2] = {
3593         {
3594                 .owner =                THIS_MODULE,
3595                 .write =                snd_pcm_write,
3596                 .aio_write =            snd_pcm_aio_write,
3597                 .open =                 snd_pcm_playback_open,
3598                 .release =              snd_pcm_release,
3599                 .llseek =               no_llseek,
3600                 .poll =                 snd_pcm_playback_poll,
3601                 .unlocked_ioctl =       snd_pcm_playback_ioctl,
3602                 .compat_ioctl =         snd_pcm_ioctl_compat,
3603                 .mmap =                 snd_pcm_mmap,
3604                 .fasync =               snd_pcm_fasync,
3605                 .get_unmapped_area =    snd_pcm_get_unmapped_area,
3606         },
3607         {
3608                 .owner =                THIS_MODULE,
3609                 .read =                 snd_pcm_read,
3610                 .aio_read =             snd_pcm_aio_read,
3611                 .open =                 snd_pcm_capture_open,
3612                 .release =              snd_pcm_release,
3613                 .llseek =               no_llseek,
3614                 .poll =                 snd_pcm_capture_poll,
3615                 .unlocked_ioctl =       snd_pcm_capture_ioctl,
3616                 .compat_ioctl =         snd_pcm_ioctl_compat,
3617                 .mmap =                 snd_pcm_mmap,
3618                 .fasync =               snd_pcm_fasync,
3619                 .get_unmapped_area =    snd_pcm_get_unmapped_area,
3620         }
3621 };