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/io.h>
  30 #include <linux/dma-mapping.h>
  31 #include <sound/core.h>
  32 #include <sound/control.h>
  33 #include <sound/info.h>
  34 #include <sound/pcm.h>
  35 #include <sound/pcm_params.h>
  36 #include <sound/timer.h>
  37 #include <sound/minors.h>
  38
  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 /**
  78  * snd_pcm_stream_lock - Lock the PCM stream
  79  * @substream: PCM substream
  80  *
  81  * This locks the PCM stream's spinlock or mutex depending on the nonatomic
  82  * flag of the given substream.  This also takes the global link rw lock
  83  * (or rw sem), too, for avoiding the race with linked streams.
  84  */
  85 void snd_pcm_stream_lock(struct snd_pcm_substream *substream)
  86 {
  87         if (substream->pcm->nonatomic) {
  88                 down_read(&snd_pcm_link_rwsem);
  89                 mutex_lock(&substream->self_group.mutex);
  90         } else {
  91                 read_lock(&snd_pcm_link_rwlock);
  92                 spin_lock(&substream->self_group.lock);
  93         }
  94 }
  95 EXPORT_SYMBOL_GPL(snd_pcm_stream_lock);
  96
  97 /**
  98  * snd_pcm_stream_lock - Unlock the PCM stream
  99  * @substream: PCM substream
 100  *
 101  * This unlocks the PCM stream that has been locked via snd_pcm_stream_lock().
 102  */
 103 void snd_pcm_stream_unlock(struct snd_pcm_substream *substream)
 104 {
 105         if (substream->pcm->nonatomic) {
 106                 mutex_unlock(&substream->self_group.mutex);
 107                 up_read(&snd_pcm_link_rwsem);
 108         } else {
 109                 spin_unlock(&substream->self_group.lock);
 110                 read_unlock(&snd_pcm_link_rwlock);
 111         }
 112 }
 113 EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock);
 114
 115 /**
 116  * snd_pcm_stream_lock_irq - Lock the PCM stream
 117  * @substream: PCM substream
 118  *
 119  * This locks the PCM stream like snd_pcm_stream_lock() and disables the local
 120  * IRQ (only when nonatomic is false).  In nonatomic case, this is identical
 121  * as snd_pcm_stream_lock().
 122  */
 123 void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream)
 124 {
 125         if (!substream->pcm->nonatomic)
 126                 local_irq_disable();
 127         snd_pcm_stream_lock(substream);
 128 }
 129 EXPORT_SYMBOL_GPL(snd_pcm_stream_lock_irq);
 130
 131 /**
 132  * snd_pcm_stream_unlock_irq - Unlock the PCM stream
 133  * @substream: PCM substream
 134  *
 135  * This is a counter-part of snd_pcm_stream_lock_irq().
 136  */
 137 void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream)
 138 {
 139         snd_pcm_stream_unlock(substream);
 140         if (!substream->pcm->nonatomic)
 141                 local_irq_enable();
 142 }
 143 EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irq);
 144
 145 unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream)
 146 {
 147         unsigned long flags = 0;
 148         if (!substream->pcm->nonatomic)
 149                 local_irq_save(flags);
 150         snd_pcm_stream_lock(substream);
 151         return flags;
 152 }
 153 EXPORT_SYMBOL_GPL(_snd_pcm_stream_lock_irqsave);
 154
 155 /**
 156  * snd_pcm_stream_unlock_irqrestore - Unlock the PCM stream
 157  * @substream: PCM substream
 158  * @flags: irq flags
 159  *
 160  * This is a counter-part of snd_pcm_stream_lock_irqsave().
 161  */
 162 void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream,
 163                                       unsigned long flags)
 164 {
 165         snd_pcm_stream_unlock(substream);
 166         if (!substream->pcm->nonatomic)
 167                 local_irq_restore(flags);
 168 }
 169 EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irqrestore);
 170
 171 static inline mm_segment_t snd_enter_user(void)
 172 {
 173         mm_segment_t fs = get_fs();
 174         set_fs(get_ds());
 175         return fs;
 176 }
 177
 178 static inline void snd_leave_user(mm_segment_t fs)
 179 {
 180         set_fs(fs);
 181 }
 182
 183
 184
 185 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
 186 {
 187         struct snd_pcm_runtime *runtime;
 188         struct snd_pcm *pcm = substream->pcm;
 189         struct snd_pcm_str *pstr = substream->pstr;
 190
 191         memset(info, 0, sizeof(*info));
 192         info->card = pcm->card->number;
 193         info->device = pcm->device;
 194         info->stream = substream->stream;
 195         info->subdevice = substream->number;
 196         strlcpy(info->id, pcm->id, sizeof(info->id));
 197         strlcpy(info->name, pcm->name, sizeof(info->name));
 198         info->dev_class = pcm->dev_class;
 199         info->dev_subclass = pcm->dev_subclass;
 200         info->subdevices_count = pstr->substream_count;
 201         info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
 202         strlcpy(info->subname, substream->name, sizeof(info->subname));
 203         runtime = substream->runtime;
 204         /* AB: FIXME!!! This is definitely nonsense */
 205         if (runtime) {
 206                 info->sync = runtime->sync;
 207                 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
 208         }
 209         return 0;
 210 }
 211
 212 int snd_pcm_info_user(struct snd_pcm_substream *substream,
 213                       struct snd_pcm_info __user * _info)
 214 {
 215         struct snd_pcm_info *info;
 216         int err;
 217
 218         info = kmalloc(sizeof(*info), GFP_KERNEL);
 219         if (! info)
 220                 return -ENOMEM;
 221         err = snd_pcm_info(substream, info);
 222         if (err >= 0) {
 223                 if (copy_to_user(_info, info, sizeof(*info)))
 224                         err = -EFAULT;
 225         }
 226         kfree(info);
 227         return err;
 228 }
 229
 230 static bool hw_support_mmap(struct snd_pcm_substream *substream)
 231 {
 232         if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_MMAP))
 233                 return false;
 234         /* check architectures that return -EINVAL from dma_mmap_coherent() */
 235         /* FIXME: this should be some global flag */
 236 #if defined(CONFIG_C6X) || defined(CONFIG_FRV) || defined(CONFIG_MN10300) ||\
 237         defined(CONFIG_PARISC) || defined(CONFIG_XTENSA)
 238         if (!substream->ops->mmap &&
 239             substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
 240                 return false;
 241 #endif
 242         return true;
 243 }
 244
 245 #undef RULES_DEBUG
 246
 247 #ifdef RULES_DEBUG
 248 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
 249 static const char * const snd_pcm_hw_param_names[] = {
 250         HW_PARAM(ACCESS),
 251         HW_PARAM(FORMAT),
 252         HW_PARAM(SUBFORMAT),
 253         HW_PARAM(SAMPLE_BITS),
 254         HW_PARAM(FRAME_BITS),
 255         HW_PARAM(CHANNELS),
 256         HW_PARAM(RATE),
 257         HW_PARAM(PERIOD_TIME),
 258         HW_PARAM(PERIOD_SIZE),
 259         HW_PARAM(PERIOD_BYTES),
 260         HW_PARAM(PERIODS),
 261         HW_PARAM(BUFFER_TIME),
 262         HW_PARAM(BUFFER_SIZE),
 263         HW_PARAM(BUFFER_BYTES),
 264         HW_PARAM(TICK_TIME),
 265 };
 266 #endif
 267
 268 int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
 269                       struct snd_pcm_hw_params *params)
 270 {
 271         unsigned int k;
 272         struct snd_pcm_hardware *hw;
 273         struct snd_interval *i = NULL;
 274         struct snd_mask *m = NULL;
 275         struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
 276         unsigned int rstamps[constrs->rules_num];
 277         unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
 278         unsigned int stamp = 2;
 279         int changed, again;
 280
 281         params->info = 0;
 282         params->fifo_size = 0;
 283         if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
 284                 params->msbits = 0;
 285         if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
 286                 params->rate_num = 0;
 287                 params->rate_den = 0;
 288         }
 289
 290         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
 291                 m = hw_param_mask(params, k);
 292                 if (snd_mask_empty(m))
 293                         return -EINVAL;
 294                 if (!(params->rmask & (1 << k)))
 295                         continue;
 296 #ifdef RULES_DEBUG
 297                 pr_debug("%s = ", snd_pcm_hw_param_names[k]);
 298                 pr_cont("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
 299 #endif
 300                 changed = snd_mask_refine(m, constrs_mask(constrs, k));
 301 #ifdef RULES_DEBUG
 302                 pr_cont("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
 303 #endif
 304                 if (changed)
 305                         params->cmask |= 1 << k;
 306                 if (changed < 0)
 307                         return changed;
 308         }
 309
 310         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
 311                 i = hw_param_interval(params, k);
 312                 if (snd_interval_empty(i))
 313                         return -EINVAL;
 314                 if (!(params->rmask & (1 << k)))
 315                         continue;
 316 #ifdef RULES_DEBUG
 317                 pr_debug("%s = ", snd_pcm_hw_param_names[k]);
 318                 if (i->empty)
 319                         pr_cont("empty");
 320                 else
 321                         pr_cont("%c%u %u%c",
 322                                i->openmin ? '(' : '[', i->min,
 323                                i->max, i->openmax ? ')' : ']');
 324                 pr_cont(" -> ");
 325 #endif
 326                 changed = snd_interval_refine(i, constrs_interval(constrs, k));
 327 #ifdef RULES_DEBUG
 328                 if (i->empty)
 329                         pr_cont("empty\n");
 330                 else
 331                         pr_cont("%c%u %u%c\n",
 332                                i->openmin ? '(' : '[', i->min,
 333                                i->max, i->openmax ? ')' : ']');
 334 #endif
 335                 if (changed)
 336                         params->cmask |= 1 << k;
 337                 if (changed < 0)
 338                         return changed;
 339         }
 340
 341         for (k = 0; k < constrs->rules_num; k++)
 342                 rstamps[k] = 0;
 343         for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
 344                 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
 345         do {
 346                 again = 0;
 347                 for (k = 0; k < constrs->rules_num; k++) {
 348                         struct snd_pcm_hw_rule *r = &constrs->rules[k];
 349                         unsigned int d;
 350                         int doit = 0;
 351                         if (r->cond && !(r->cond & params->flags))
 352                                 continue;
 353                         for (d = 0; r->deps[d] >= 0; d++) {
 354                                 if (vstamps[r->deps[d]] > rstamps[k]) {
 355                                         doit = 1;
 356                                         break;
 357                                 }
 358                         }
 359                         if (!doit)
 360                                 continue;
 361 #ifdef RULES_DEBUG
 362                         pr_debug("Rule %d [%p]: ", k, r->func);
 363                         if (r->var >= 0) {
 364                                 pr_cont("%s = ", snd_pcm_hw_param_names[r->var]);
 365                                 if (hw_is_mask(r->var)) {
 366                                         m = hw_param_mask(params, r->var);
 367                                         pr_cont("%x", *m->bits);
 368                                 } else {
 369                                         i = hw_param_interval(params, r->var);
 370                                         if (i->empty)
 371                                                 pr_cont("empty");
 372                                         else
 373                                                 pr_cont("%c%u %u%c",
 374                                                        i->openmin ? '(' : '[', i->min,
 375                                                        i->max, i->openmax ? ')' : ']');
 376                                 }
 377                         }
 378 #endif
 379                         changed = r->func(params, r);
 380 #ifdef RULES_DEBUG
 381                         if (r->var >= 0) {
 382                                 pr_cont(" -> ");
 383                                 if (hw_is_mask(r->var))
 384                                         pr_cont("%x", *m->bits);
 385                                 else {
 386                                         if (i->empty)
 387                                                 pr_cont("empty");
 388                                         else
 389                                                 pr_cont("%c%u %u%c",
 390                                                        i->openmin ? '(' : '[', i->min,
 391                                                        i->max, i->openmax ? ')' : ']');
 392                                 }
 393                         }
 394                         pr_cont("\n");
 395 #endif
 396                         rstamps[k] = stamp;
 397                         if (changed && r->var >= 0) {
 398                                 params->cmask |= (1 << r->var);
 399                                 vstamps[r->var] = stamp;
 400                                 again = 1;
 401                         }
 402                         if (changed < 0)
 403                                 return changed;
 404                         stamp++;
 405                 }
 406         } while (again);
 407         if (!params->msbits) {
 408                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
 409                 if (snd_interval_single(i))
 410                         params->msbits = snd_interval_value(i);
 411         }
 412
 413         if (!params->rate_den) {
 414                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
 415                 if (snd_interval_single(i)) {
 416                         params->rate_num = snd_interval_value(i);
 417                         params->rate_den = 1;
 418                 }
 419         }
 420
 421         hw = &substream->runtime->hw;
 422         if (!params->info) {
 423                 params->info = hw->info & ~(SNDRV_PCM_INFO_FIFO_IN_FRAMES |
 424                                             SNDRV_PCM_INFO_DRAIN_TRIGGER);
 425                 if (!hw_support_mmap(substream))
 426                         params->info &= ~(SNDRV_PCM_INFO_MMAP |
 427                                           SNDRV_PCM_INFO_MMAP_VALID);
 428         }
 429         if (!params->fifo_size) {
 430                 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
 431                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
 432                 if (snd_mask_min(m) == snd_mask_max(m) &&
 433                     snd_interval_min(i) == snd_interval_max(i)) {
 434                         changed = substream->ops->ioctl(substream,
 435                                         SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
 436                         if (changed < 0)
 437                                 return changed;
 438                 }
 439         }
 440         params->rmask = 0;
 441         return 0;
 442 }
 443
 444 EXPORT_SYMBOL(snd_pcm_hw_refine);
 445
 446 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
 447                                   struct snd_pcm_hw_params __user * _params)
 448 {
 449         struct snd_pcm_hw_params *params;
 450         int err;
 451
 452         params = memdup_user(_params, sizeof(*params));
 453         if (IS_ERR(params))
 454                 return PTR_ERR(params);
 455
 456         err = snd_pcm_hw_refine(substream, params);
 457         if (copy_to_user(_params, params, sizeof(*params))) {
 458                 if (!err)
 459                         err = -EFAULT;
 460         }
 461
 462         kfree(params);
 463         return err;
 464 }
 465
 466 static int period_to_usecs(struct snd_pcm_runtime *runtime)
 467 {
 468         int usecs;
 469
 470         if (! runtime->rate)
 471                 return -1; /* invalid */
 472
 473         /* take 75% of period time as the deadline */
 474         usecs = (750000 / runtime->rate) * runtime->period_size;
 475         usecs += ((750000 % runtime->rate) * runtime->period_size) /
 476                 runtime->rate;
 477
 478         return usecs;
 479 }
 480
 481 static void snd_pcm_set_state(struct snd_pcm_substream *substream, int state)
 482 {
 483         snd_pcm_stream_lock_irq(substream);
 484         if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED)
 485                 substream->runtime->status->state = state;
 486         snd_pcm_stream_unlock_irq(substream);
 487 }
 488
 489 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
 490                              struct snd_pcm_hw_params *params)
 491 {
 492         struct snd_pcm_runtime *runtime;
 493         int err, usecs;
 494         unsigned int bits;
 495         snd_pcm_uframes_t frames;
 496
 497         if (PCM_RUNTIME_CHECK(substream))
 498                 return -ENXIO;
 499         runtime = substream->runtime;
 500         snd_pcm_stream_lock_irq(substream);
 501         switch (runtime->status->state) {
 502         case SNDRV_PCM_STATE_OPEN:
 503         case SNDRV_PCM_STATE_SETUP:
 504         case SNDRV_PCM_STATE_PREPARED:
 505                 break;
 506         default:
 507                 snd_pcm_stream_unlock_irq(substream);
 508                 return -EBADFD;
 509         }
 510         snd_pcm_stream_unlock_irq(substream);
 511 #if IS_ENABLED(CONFIG_SND_PCM_OSS)
 512         if (!substream->oss.oss)
 513 #endif
 514                 if (atomic_read(&substream->mmap_count))
 515                         return -EBADFD;
 516
 517         params->rmask = ~0U;
 518         err = snd_pcm_hw_refine(substream, params);
 519         if (err < 0)
 520                 goto _error;
 521
 522         err = snd_pcm_hw_params_choose(substream, params);
 523         if (err < 0)
 524                 goto _error;
 525
 526         if (substream->ops->hw_params != NULL) {
 527                 err = substream->ops->hw_params(substream, params);
 528                 if (err < 0)
 529                         goto _error;
 530         }
 531
 532         runtime->access = params_access(params);
 533         runtime->format = params_format(params);
 534         runtime->subformat = params_subformat(params);
 535         runtime->channels = params_channels(params);
 536         runtime->rate = params_rate(params);
 537         runtime->period_size = params_period_size(params);
 538         runtime->periods = params_periods(params);
 539         runtime->buffer_size = params_buffer_size(params);
 540         runtime->info = params->info;
 541         runtime->rate_num = params->rate_num;
 542         runtime->rate_den = params->rate_den;
 543         runtime->no_period_wakeup =
 544                         (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
 545                         (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
 546
 547         bits = snd_pcm_format_physical_width(runtime->format);
 548         runtime->sample_bits = bits;
 549         bits *= runtime->channels;
 550         runtime->frame_bits = bits;
 551         frames = 1;
 552         while (bits % 8 != 0) {
 553                 bits *= 2;
 554                 frames *= 2;
 555         }
 556         runtime->byte_align = bits / 8;
 557         runtime->min_align = frames;
 558
 559         /* Default sw params */
 560         runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
 561         runtime->period_step = 1;
 562         runtime->control->avail_min = runtime->period_size;
 563         runtime->start_threshold = 1;
 564         runtime->stop_threshold = runtime->buffer_size;
 565         runtime->silence_threshold = 0;
 566         runtime->silence_size = 0;
 567         runtime->boundary = runtime->buffer_size;
 568         while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
 569                 runtime->boundary *= 2;
 570
 571         snd_pcm_timer_resolution_change(substream);
 572         snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP);
 573
 574         if (pm_qos_request_active(&substream->latency_pm_qos_req))
 575                 pm_qos_remove_request(&substream->latency_pm_qos_req);
 576         if ((usecs = period_to_usecs(runtime)) >= 0)
 577                 pm_qos_add_request(&substream->latency_pm_qos_req,
 578                                    PM_QOS_CPU_DMA_LATENCY, usecs);
 579         return 0;
 580  _error:
 581         /* hardware might be unusable from this time,
 582            so we force application to retry to set
 583            the correct hardware parameter settings */
 584         snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
 585         if (substream->ops->hw_free != NULL)
 586                 substream->ops->hw_free(substream);
 587         return err;
 588 }
 589
 590 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
 591                                   struct snd_pcm_hw_params __user * _params)
 592 {
 593         struct snd_pcm_hw_params *params;
 594         int err;
 595
 596         params = memdup_user(_params, sizeof(*params));
 597         if (IS_ERR(params))
 598                 return PTR_ERR(params);
 599
 600         err = snd_pcm_hw_params(substream, params);
 601         if (copy_to_user(_params, params, sizeof(*params))) {
 602                 if (!err)
 603                         err = -EFAULT;
 604         }
 605
 606         kfree(params);
 607         return err;
 608 }
 609
 610 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
 611 {
 612         struct snd_pcm_runtime *runtime;
 613         int result = 0;
 614
 615         if (PCM_RUNTIME_CHECK(substream))
 616                 return -ENXIO;
 617         runtime = substream->runtime;
 618         snd_pcm_stream_lock_irq(substream);
 619         switch (runtime->status->state) {
 620         case SNDRV_PCM_STATE_SETUP:
 621         case SNDRV_PCM_STATE_PREPARED:
 622                 break;
 623         default:
 624                 snd_pcm_stream_unlock_irq(substream);
 625                 return -EBADFD;
 626         }
 627         snd_pcm_stream_unlock_irq(substream);
 628         if (atomic_read(&substream->mmap_count))
 629                 return -EBADFD;
 630         if (substream->ops->hw_free)
 631                 result = substream->ops->hw_free(substream);
 632         snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
 633         pm_qos_remove_request(&substream->latency_pm_qos_req);
 634         return result;
 635 }
 636
 637 static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
 638                              struct snd_pcm_sw_params *params)
 639 {
 640         struct snd_pcm_runtime *runtime;
 641         int err;
 642
 643         if (PCM_RUNTIME_CHECK(substream))
 644                 return -ENXIO;
 645         runtime = substream->runtime;
 646         snd_pcm_stream_lock_irq(substream);
 647         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 648                 snd_pcm_stream_unlock_irq(substream);
 649                 return -EBADFD;
 650         }
 651         snd_pcm_stream_unlock_irq(substream);
 652
 653         if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
 654                 return -EINVAL;
 655         if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12) &&
 656             params->tstamp_type > SNDRV_PCM_TSTAMP_TYPE_LAST)
 657                 return -EINVAL;
 658         if (params->avail_min == 0)
 659                 return -EINVAL;
 660         if (params->silence_size >= runtime->boundary) {
 661                 if (params->silence_threshold != 0)
 662                         return -EINVAL;
 663         } else {
 664                 if (params->silence_size > params->silence_threshold)
 665                         return -EINVAL;
 666                 if (params->silence_threshold > runtime->buffer_size)
 667                         return -EINVAL;
 668         }
 669         err = 0;
 670         snd_pcm_stream_lock_irq(substream);
 671         runtime->tstamp_mode = params->tstamp_mode;
 672         if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12))
 673                 runtime->tstamp_type = params->tstamp_type;
 674         runtime->period_step = params->period_step;
 675         runtime->control->avail_min = params->avail_min;
 676         runtime->start_threshold = params->start_threshold;
 677         runtime->stop_threshold = params->stop_threshold;
 678         runtime->silence_threshold = params->silence_threshold;
 679         runtime->silence_size = params->silence_size;
 680         params->boundary = runtime->boundary;
 681         if (snd_pcm_running(substream)) {
 682                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 683                     runtime->silence_size > 0)
 684                         snd_pcm_playback_silence(substream, ULONG_MAX);
 685                 err = snd_pcm_update_state(substream, runtime);
 686         }
 687         snd_pcm_stream_unlock_irq(substream);
 688         return err;
 689 }
 690
 691 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
 692                                   struct snd_pcm_sw_params __user * _params)
 693 {
 694         struct snd_pcm_sw_params params;
 695         int err;
 696         if (copy_from_user(&params, _params, sizeof(params)))
 697                 return -EFAULT;
 698         err = snd_pcm_sw_params(substream, &params);
 699         if (copy_to_user(_params, &params, sizeof(params)))
 700                 return -EFAULT;
 701         return err;
 702 }
 703
 704 int snd_pcm_status(struct snd_pcm_substream *substream,
 705                    struct snd_pcm_status *status)
 706 {
 707         struct snd_pcm_runtime *runtime = substream->runtime;
 708
 709         snd_pcm_stream_lock_irq(substream);
 710         status->state = runtime->status->state;
 711         status->suspended_state = runtime->status->suspended_state;
 712         if (status->state == SNDRV_PCM_STATE_OPEN)
 713                 goto _end;
 714         status->trigger_tstamp = runtime->trigger_tstamp;
 715         if (snd_pcm_running(substream)) {
 716                 snd_pcm_update_hw_ptr(substream);
 717                 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
 718                         status->tstamp = runtime->status->tstamp;
 719                         status->audio_tstamp =
 720                                 runtime->status->audio_tstamp;
 721                         goto _tstamp_end;
 722                 }
 723         } else {
 724                 /* get tstamp only in fallback mode and only if enabled */
 725                 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE)
 726                         snd_pcm_gettime(runtime, &status->tstamp);
 727         }
 728  _tstamp_end:
 729         status->appl_ptr = runtime->control->appl_ptr;
 730         status->hw_ptr = runtime->status->hw_ptr;
 731         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 732                 status->avail = snd_pcm_playback_avail(runtime);
 733                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
 734                     runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
 735                         status->delay = runtime->buffer_size - status->avail;
 736                         status->delay += runtime->delay;
 737                 } else
 738                         status->delay = 0;
 739         } else {
 740                 status->avail = snd_pcm_capture_avail(runtime);
 741                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
 742                         status->delay = status->avail + runtime->delay;
 743                 else
 744                         status->delay = 0;
 745         }
 746         status->avail_max = runtime->avail_max;
 747         status->overrange = runtime->overrange;
 748         runtime->avail_max = 0;
 749         runtime->overrange = 0;
 750  _end:
 751         snd_pcm_stream_unlock_irq(substream);
 752         return 0;
 753 }
 754
 755 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
 756                                struct snd_pcm_status __user * _status)
 757 {
 758         struct snd_pcm_status status;
 759         int res;
 760
 761         memset(&status, 0, sizeof(status));
 762         res = snd_pcm_status(substream, &status);
 763         if (res < 0)
 764                 return res;
 765         if (copy_to_user(_status, &status, sizeof(status)))
 766                 return -EFAULT;
 767         return 0;
 768 }
 769
 770 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
 771                                 struct snd_pcm_channel_info * info)
 772 {
 773         struct snd_pcm_runtime *runtime;
 774         unsigned int channel;
 775
 776         channel = info->channel;
 777         runtime = substream->runtime;
 778         snd_pcm_stream_lock_irq(substream);
 779         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 780                 snd_pcm_stream_unlock_irq(substream);
 781                 return -EBADFD;
 782         }
 783         snd_pcm_stream_unlock_irq(substream);
 784         if (channel >= runtime->channels)
 785                 return -EINVAL;
 786         memset(info, 0, sizeof(*info));
 787         info->channel = channel;
 788         return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
 789 }
 790
 791 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
 792                                      struct snd_pcm_channel_info __user * _info)
 793 {
 794         struct snd_pcm_channel_info info;
 795         int res;
 796
 797         if (copy_from_user(&info, _info, sizeof(info)))
 798                 return -EFAULT;
 799         res = snd_pcm_channel_info(substream, &info);
 800         if (res < 0)
 801                 return res;
 802         if (copy_to_user(_info, &info, sizeof(info)))
 803                 return -EFAULT;
 804         return 0;
 805 }
 806
 807 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
 808 {
 809         struct snd_pcm_runtime *runtime = substream->runtime;
 810         if (runtime->trigger_master == NULL)
 811                 return;
 812         if (runtime->trigger_master == substream) {
 813                 if (!runtime->trigger_tstamp_latched)
 814                         snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
 815         } else {
 816                 snd_pcm_trigger_tstamp(runtime->trigger_master);
 817                 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
 818         }
 819         runtime->trigger_master = NULL;
 820 }
 821
 822 struct action_ops {
 823         int (*pre_action)(struct snd_pcm_substream *substream, int state);
 824         int (*do_action)(struct snd_pcm_substream *substream, int state);
 825         void (*undo_action)(struct snd_pcm_substream *substream, int state);
 826         void (*post_action)(struct snd_pcm_substream *substream, int state);
 827 };
 828
 829 /*
 830  *  this functions is core for handling of linked stream
 831  *  Note: the stream state might be changed also on failure
 832  *  Note2: call with calling stream lock + link lock
 833  */
 834 static int snd_pcm_action_group(struct action_ops *ops,
 835                                 struct snd_pcm_substream *substream,
 836                                 int state, int do_lock)
 837 {
 838         struct snd_pcm_substream *s = NULL;
 839         struct snd_pcm_substream *s1;
 840         int res = 0, depth = 1;
 841
 842         snd_pcm_group_for_each_entry(s, substream) {
 843                 if (do_lock && s != substream) {
 844                         if (s->pcm->nonatomic)
 845                                 mutex_lock_nested(&s->self_group.mutex, depth);
 846                         else
 847                                 spin_lock_nested(&s->self_group.lock, depth);
 848                         depth++;
 849                 }
 850                 res = ops->pre_action(s, state);
 851                 if (res < 0)
 852                         goto _unlock;
 853         }
 854         snd_pcm_group_for_each_entry(s, substream) {
 855                 res = ops->do_action(s, state);
 856                 if (res < 0) {
 857                         if (ops->undo_action) {
 858                                 snd_pcm_group_for_each_entry(s1, substream) {
 859                                         if (s1 == s) /* failed stream */
 860                                                 break;
 861                                         ops->undo_action(s1, state);
 862                                 }
 863                         }
 864                         s = NULL; /* unlock all */
 865                         goto _unlock;
 866                 }
 867         }
 868         snd_pcm_group_for_each_entry(s, substream) {
 869                 ops->post_action(s, state);
 870         }
 871  _unlock:
 872         if (do_lock) {
 873                 /* unlock streams */
 874                 snd_pcm_group_for_each_entry(s1, substream) {
 875                         if (s1 != substream) {
 876                                 if (s1->pcm->nonatomic)
 877                                         mutex_unlock(&s1->self_group.mutex);
 878                                 else
 879                                         spin_unlock(&s1->self_group.lock);
 880                         }
 881                         if (s1 == s)    /* end */
 882                                 break;
 883                 }
 884         }
 885         return res;
 886 }
 887
 888 /*
 889  *  Note: call with stream lock
 890  */
 891 static int snd_pcm_action_single(struct action_ops *ops,
 892                                  struct snd_pcm_substream *substream,
 893                                  int state)
 894 {
 895         int res;
 896
 897         res = ops->pre_action(substream, state);
 898         if (res < 0)
 899                 return res;
 900         res = ops->do_action(substream, state);
 901         if (res == 0)
 902                 ops->post_action(substream, state);
 903         else if (ops->undo_action)
 904                 ops->undo_action(substream, state);
 905         return res;
 906 }
 907
 908 /*
 909  *  Note: call with stream lock
 910  */
 911 static int snd_pcm_action(struct action_ops *ops,
 912                           struct snd_pcm_substream *substream,
 913                           int state)
 914 {
 915         int res;
 916
 917         if (!snd_pcm_stream_linked(substream))
 918                 return snd_pcm_action_single(ops, substream, state);
 919
 920         if (substream->pcm->nonatomic) {
 921                 if (!mutex_trylock(&substream->group->mutex)) {
 922                         mutex_unlock(&substream->self_group.mutex);
 923                         mutex_lock(&substream->group->mutex);
 924                         mutex_lock(&substream->self_group.mutex);
 925                 }
 926                 res = snd_pcm_action_group(ops, substream, state, 1);
 927                 mutex_unlock(&substream->group->mutex);
 928         } else {
 929                 if (!spin_trylock(&substream->group->lock)) {
 930                         spin_unlock(&substream->self_group.lock);
 931                         spin_lock(&substream->group->lock);
 932                         spin_lock(&substream->self_group.lock);
 933                 }
 934                 res = snd_pcm_action_group(ops, substream, state, 1);
 935                 spin_unlock(&substream->group->lock);
 936         }
 937         return res;
 938 }
 939
 940 /*
 941  *  Note: don't use any locks before
 942  */
 943 static int snd_pcm_action_lock_irq(struct action_ops *ops,
 944                                    struct snd_pcm_substream *substream,
 945                                    int state)
 946 {
 947         int res;
 948
 949         snd_pcm_stream_lock_irq(substream);
 950         res = snd_pcm_action(ops, substream, state);
 951         snd_pcm_stream_unlock_irq(substream);
 952         return res;
 953 }
 954
 955 /*
 956  */
 957 static int snd_pcm_action_nonatomic(struct action_ops *ops,
 958                                     struct snd_pcm_substream *substream,
 959                                     int state)
 960 {
 961         int res;
 962
 963         down_read(&snd_pcm_link_rwsem);
 964         if (snd_pcm_stream_linked(substream))
 965                 res = snd_pcm_action_group(ops, substream, state, 0);
 966         else
 967                 res = snd_pcm_action_single(ops, substream, state);
 968         up_read(&snd_pcm_link_rwsem);
 969         return res;
 970 }
 971
 972 /*
 973  * start callbacks
 974  */
 975 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
 976 {
 977         struct snd_pcm_runtime *runtime = substream->runtime;
 978         if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
 979                 return -EBADFD;
 980         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 981             !snd_pcm_playback_data(substream))
 982                 return -EPIPE;
 983         runtime->trigger_tstamp_latched = false;
 984         runtime->trigger_master = substream;
 985         return 0;
 986 }
 987
 988 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
 989 {
 990         if (substream->runtime->trigger_master != substream)
 991                 return 0;
 992         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
 993 }
 994
 995 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
 996 {
 997         if (substream->runtime->trigger_master == substream)
 998                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
 999 }
1000
1001 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
1002 {
1003         struct snd_pcm_runtime *runtime = substream->runtime;
1004         snd_pcm_trigger_tstamp(substream);
1005         runtime->hw_ptr_jiffies = jiffies;
1006         runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
1007                                                             runtime->rate;
1008         runtime->status->state = state;
1009         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1010             runtime->silence_size > 0)
1011                 snd_pcm_playback_silence(substream, ULONG_MAX);
1012         if (substream->timer)
1013                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
1014                                  &runtime->trigger_tstamp);
1015 }
1016
1017 static struct action_ops snd_pcm_action_start = {
1018         .pre_action = snd_pcm_pre_start,
1019         .do_action = snd_pcm_do_start,
1020         .undo_action = snd_pcm_undo_start,
1021         .post_action = snd_pcm_post_start
1022 };
1023
1024 /**
1025  * snd_pcm_start - start all linked streams
1026  * @substream: the PCM substream instance
1027  *
1028  * Return: Zero if successful, or a negative error code.
1029  */
1030 int snd_pcm_start(struct snd_pcm_substream *substream)
1031 {
1032         return snd_pcm_action(&snd_pcm_action_start, substream,
1033                               SNDRV_PCM_STATE_RUNNING);
1034 }
1035
1036 /*
1037  * stop callbacks
1038  */
1039 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
1040 {
1041         struct snd_pcm_runtime *runtime = substream->runtime;
1042         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1043                 return -EBADFD;
1044         runtime->trigger_master = substream;
1045         return 0;
1046 }
1047
1048 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
1049 {
1050         if (substream->runtime->trigger_master == substream &&
1051             snd_pcm_running(substream))
1052                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1053         return 0; /* unconditonally stop all substreams */
1054 }
1055
1056 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
1057 {
1058         struct snd_pcm_runtime *runtime = substream->runtime;
1059         if (runtime->status->state != state) {
1060                 snd_pcm_trigger_tstamp(substream);
1061                 runtime->status->state = state;
1062                 if (substream->timer)
1063                         snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
1064                                          &runtime->trigger_tstamp);
1065         }
1066         wake_up(&runtime->sleep);
1067         wake_up(&runtime->tsleep);
1068 }
1069
1070 static struct action_ops snd_pcm_action_stop = {
1071         .pre_action = snd_pcm_pre_stop,
1072         .do_action = snd_pcm_do_stop,
1073         .post_action = snd_pcm_post_stop
1074 };
1075
1076 /**
1077  * snd_pcm_stop - try to stop all running streams in the substream group
1078  * @substream: the PCM substream instance
1079  * @state: PCM state after stopping the stream
1080  *
1081  * The state of each stream is then changed to the given state unconditionally.
1082  *
1083  * Return: Zero if successful, or a negative error code.
1084  */
1085 int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
1086 {
1087         return snd_pcm_action(&snd_pcm_action_stop, substream, state);
1088 }
1089
1090 EXPORT_SYMBOL(snd_pcm_stop);
1091
1092 /**
1093  * snd_pcm_drain_done - stop the DMA only when the given stream is playback
1094  * @substream: the PCM substream
1095  *
1096  * After stopping, the state is changed to SETUP.
1097  * Unlike snd_pcm_stop(), this affects only the given stream.
1098  *
1099  * Return: Zero if succesful, or a negative error code.
1100  */
1101 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
1102 {
1103         return snd_pcm_action_single(&snd_pcm_action_stop, substream,
1104                                      SNDRV_PCM_STATE_SETUP);
1105 }
1106
1107 /**
1108  * snd_pcm_stop_xrun - stop the running streams as XRUN
1109  * @substream: the PCM substream instance
1110  *
1111  * This stops the given running substream (and all linked substreams) as XRUN.
1112  * Unlike snd_pcm_stop(), this function takes the substream lock by itself.
1113  *
1114  * Return: Zero if successful, or a negative error code.
1115  */
1116 int snd_pcm_stop_xrun(struct snd_pcm_substream *substream)
1117 {
1118         unsigned long flags;
1119         int ret = 0;
1120
1121         snd_pcm_stream_lock_irqsave(substream, flags);
1122         if (snd_pcm_running(substream))
1123                 ret = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1124         snd_pcm_stream_unlock_irqrestore(substream, flags);
1125         return ret;
1126 }
1127 EXPORT_SYMBOL_GPL(snd_pcm_stop_xrun);
1128
1129 /*
1130  * pause callbacks
1131  */
1132 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
1133 {
1134         struct snd_pcm_runtime *runtime = substream->runtime;
1135         if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
1136                 return -ENOSYS;
1137         if (push) {
1138                 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
1139                         return -EBADFD;
1140         } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
1141                 return -EBADFD;
1142         runtime->trigger_master = substream;
1143         return 0;
1144 }
1145
1146 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
1147 {
1148         if (substream->runtime->trigger_master != substream)
1149                 return 0;
1150         /* some drivers might use hw_ptr to recover from the pause -
1151            update the hw_ptr now */
1152         if (push)
1153                 snd_pcm_update_hw_ptr(substream);
1154         /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
1155          * a delta between the current jiffies, this gives a large enough
1156          * delta, effectively to skip the check once.
1157          */
1158         substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
1159         return substream->ops->trigger(substream,
1160                                        push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
1161                                               SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
1162 }
1163
1164 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1165 {
1166         if (substream->runtime->trigger_master == substream)
1167                 substream->ops->trigger(substream,
1168                                         push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1169                                         SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1170 }
1171
1172 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1173 {
1174         struct snd_pcm_runtime *runtime = substream->runtime;
1175         snd_pcm_trigger_tstamp(substream);
1176         if (push) {
1177                 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1178                 if (substream->timer)
1179                         snd_timer_notify(substream->timer,
1180                                          SNDRV_TIMER_EVENT_MPAUSE,
1181                                          &runtime->trigger_tstamp);
1182                 wake_up(&runtime->sleep);
1183                 wake_up(&runtime->tsleep);
1184         } else {
1185                 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1186                 if (substream->timer)
1187                         snd_timer_notify(substream->timer,
1188                                          SNDRV_TIMER_EVENT_MCONTINUE,
1189                                          &runtime->trigger_tstamp);
1190         }
1191 }
1192
1193 static struct action_ops snd_pcm_action_pause = {
1194         .pre_action = snd_pcm_pre_pause,
1195         .do_action = snd_pcm_do_pause,
1196         .undo_action = snd_pcm_undo_pause,
1197         .post_action = snd_pcm_post_pause
1198 };
1199
1200 /*
1201  * Push/release the pause for all linked streams.
1202  */
1203 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1204 {
1205         return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1206 }
1207
1208 #ifdef CONFIG_PM
1209 /* suspend */
1210
1211 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1212 {
1213         struct snd_pcm_runtime *runtime = substream->runtime;
1214         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1215                 return -EBUSY;
1216         runtime->trigger_master = substream;
1217         return 0;
1218 }
1219
1220 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1221 {
1222         struct snd_pcm_runtime *runtime = substream->runtime;
1223         if (runtime->trigger_master != substream)
1224                 return 0;
1225         if (! snd_pcm_running(substream))
1226                 return 0;
1227         substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1228         return 0; /* suspend unconditionally */
1229 }
1230
1231 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1232 {
1233         struct snd_pcm_runtime *runtime = substream->runtime;
1234         snd_pcm_trigger_tstamp(substream);
1235         runtime->status->suspended_state = runtime->status->state;
1236         runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1237         if (substream->timer)
1238                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1239                                  &runtime->trigger_tstamp);
1240         wake_up(&runtime->sleep);
1241         wake_up(&runtime->tsleep);
1242 }
1243
1244 static struct action_ops snd_pcm_action_suspend = {
1245         .pre_action = snd_pcm_pre_suspend,
1246         .do_action = snd_pcm_do_suspend,
1247         .post_action = snd_pcm_post_suspend
1248 };
1249
1250 /**
1251  * snd_pcm_suspend - trigger SUSPEND to all linked streams
1252  * @substream: the PCM substream
1253  *
1254  * After this call, all streams are changed to SUSPENDED state.
1255  *
1256  * Return: Zero if successful (or @substream is %NULL), or a negative error
1257  * code.
1258  */
1259 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1260 {
1261         int err;
1262         unsigned long flags;
1263
1264         if (! substream)
1265                 return 0;
1266
1267         snd_pcm_stream_lock_irqsave(substream, flags);
1268         err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1269         snd_pcm_stream_unlock_irqrestore(substream, flags);
1270         return err;
1271 }
1272
1273 EXPORT_SYMBOL(snd_pcm_suspend);
1274
1275 /**
1276  * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1277  * @pcm: the PCM instance
1278  *
1279  * After this call, all streams are changed to SUSPENDED state.
1280  *
1281  * Return: Zero if successful (or @pcm is %NULL), or a negative error code.
1282  */
1283 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1284 {
1285         struct snd_pcm_substream *substream;
1286         int stream, err = 0;
1287
1288         if (! pcm)
1289                 return 0;
1290
1291         for (stream = 0; stream < 2; stream++) {
1292                 for (substream = pcm->streams[stream].substream;
1293                      substream; substream = substream->next) {
1294                         /* FIXME: the open/close code should lock this as well */
1295                         if (substream->runtime == NULL)
1296                                 continue;
1297                         err = snd_pcm_suspend(substream);
1298                         if (err < 0 && err != -EBUSY)
1299                                 return err;
1300                 }
1301         }
1302         return 0;
1303 }
1304
1305 EXPORT_SYMBOL(snd_pcm_suspend_all);
1306
1307 /* resume */
1308
1309 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1310 {
1311         struct snd_pcm_runtime *runtime = substream->runtime;
1312         if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1313                 return -ENOSYS;
1314         runtime->trigger_master = substream;
1315         return 0;
1316 }
1317
1318 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1319 {
1320         struct snd_pcm_runtime *runtime = substream->runtime;
1321         if (runtime->trigger_master != substream)
1322                 return 0;
1323         /* DMA not running previously? */
1324         if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1325             (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1326              substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1327                 return 0;
1328         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1329 }
1330
1331 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1332 {
1333         if (substream->runtime->trigger_master == substream &&
1334             snd_pcm_running(substream))
1335                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1336 }
1337
1338 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1339 {
1340         struct snd_pcm_runtime *runtime = substream->runtime;
1341         snd_pcm_trigger_tstamp(substream);
1342         runtime->status->state = runtime->status->suspended_state;
1343         if (substream->timer)
1344                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1345                                  &runtime->trigger_tstamp);
1346 }
1347
1348 static struct action_ops snd_pcm_action_resume = {
1349         .pre_action = snd_pcm_pre_resume,
1350         .do_action = snd_pcm_do_resume,
1351         .undo_action = snd_pcm_undo_resume,
1352         .post_action = snd_pcm_post_resume
1353 };
1354
1355 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1356 {
1357         struct snd_card *card = substream->pcm->card;
1358         int res;
1359
1360         snd_power_lock(card);
1361         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1362                 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1363         snd_power_unlock(card);
1364         return res;
1365 }
1366
1367 #else
1368
1369 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1370 {
1371         return -ENOSYS;
1372 }
1373
1374 #endif /* CONFIG_PM */
1375
1376 /*
1377  * xrun ioctl
1378  *
1379  * Change the RUNNING stream(s) to XRUN state.
1380  */
1381 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1382 {
1383         struct snd_card *card = substream->pcm->card;
1384         struct snd_pcm_runtime *runtime = substream->runtime;
1385         int result;
1386
1387         snd_power_lock(card);
1388         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1389                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1390                 if (result < 0)
1391                         goto _unlock;
1392         }
1393
1394         snd_pcm_stream_lock_irq(substream);
1395         switch (runtime->status->state) {
1396         case SNDRV_PCM_STATE_XRUN:
1397                 result = 0;     /* already there */
1398                 break;
1399         case SNDRV_PCM_STATE_RUNNING:
1400                 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1401                 break;
1402         default:
1403                 result = -EBADFD;
1404         }
1405         snd_pcm_stream_unlock_irq(substream);
1406  _unlock:
1407         snd_power_unlock(card);
1408         return result;
1409 }
1410
1411 /*
1412  * reset ioctl
1413  */
1414 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1415 {
1416         struct snd_pcm_runtime *runtime = substream->runtime;
1417         switch (runtime->status->state) {
1418         case SNDRV_PCM_STATE_RUNNING:
1419         case SNDRV_PCM_STATE_PREPARED:
1420         case SNDRV_PCM_STATE_PAUSED:
1421         case SNDRV_PCM_STATE_SUSPENDED:
1422                 return 0;
1423         default:
1424                 return -EBADFD;
1425         }
1426 }
1427
1428 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1429 {
1430         struct snd_pcm_runtime *runtime = substream->runtime;
1431         int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1432         if (err < 0)
1433                 return err;
1434         runtime->hw_ptr_base = 0;
1435         runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1436                 runtime->status->hw_ptr % runtime->period_size;
1437         runtime->silence_start = runtime->status->hw_ptr;
1438         runtime->silence_filled = 0;
1439         return 0;
1440 }
1441
1442 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1443 {
1444         struct snd_pcm_runtime *runtime = substream->runtime;
1445         runtime->control->appl_ptr = runtime->status->hw_ptr;
1446         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1447             runtime->silence_size > 0)
1448                 snd_pcm_playback_silence(substream, ULONG_MAX);
1449 }
1450
1451 static struct action_ops snd_pcm_action_reset = {
1452         .pre_action = snd_pcm_pre_reset,
1453         .do_action = snd_pcm_do_reset,
1454         .post_action = snd_pcm_post_reset
1455 };
1456
1457 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1458 {
1459         return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1460 }
1461
1462 /*
1463  * prepare ioctl
1464  */
1465 /* we use the second argument for updating f_flags */
1466 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1467                                int f_flags)
1468 {
1469         struct snd_pcm_runtime *runtime = substream->runtime;
1470         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1471             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1472                 return -EBADFD;
1473         if (snd_pcm_running(substream))
1474                 return -EBUSY;
1475         substream->f_flags = f_flags;
1476         return 0;
1477 }
1478
1479 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1480 {
1481         int err;
1482         err = substream->ops->prepare(substream);
1483         if (err < 0)
1484                 return err;
1485         return snd_pcm_do_reset(substream, 0);
1486 }
1487
1488 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1489 {
1490         struct snd_pcm_runtime *runtime = substream->runtime;
1491         runtime->control->appl_ptr = runtime->status->hw_ptr;
1492         snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED);
1493 }
1494
1495 static struct action_ops snd_pcm_action_prepare = {
1496         .pre_action = snd_pcm_pre_prepare,
1497         .do_action = snd_pcm_do_prepare,
1498         .post_action = snd_pcm_post_prepare
1499 };
1500
1501 /**
1502  * snd_pcm_prepare - prepare the PCM substream to be triggerable
1503  * @substream: the PCM substream instance
1504  * @file: file to refer f_flags
1505  *
1506  * Return: Zero if successful, or a negative error code.
1507  */
1508 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1509                            struct file *file)
1510 {
1511         int res;
1512         struct snd_card *card = substream->pcm->card;
1513         int f_flags;
1514
1515         if (file)
1516                 f_flags = file->f_flags;
1517         else
1518                 f_flags = substream->f_flags;
1519
1520         snd_power_lock(card);
1521         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1522                 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1523                                                substream, f_flags);
1524         snd_power_unlock(card);
1525         return res;
1526 }
1527
1528 /*
1529  * drain ioctl
1530  */
1531
1532 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1533 {
1534         struct snd_pcm_runtime *runtime = substream->runtime;
1535         switch (runtime->status->state) {
1536         case SNDRV_PCM_STATE_OPEN:
1537         case SNDRV_PCM_STATE_DISCONNECTED:
1538         case SNDRV_PCM_STATE_SUSPENDED:
1539                 return -EBADFD;
1540         }
1541         runtime->trigger_master = substream;
1542         return 0;
1543 }
1544
1545 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1546 {
1547         struct snd_pcm_runtime *runtime = substream->runtime;
1548         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1549                 switch (runtime->status->state) {
1550                 case SNDRV_PCM_STATE_PREPARED:
1551                         /* start playback stream if possible */
1552                         if (! snd_pcm_playback_empty(substream)) {
1553                                 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1554                                 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1555                         }
1556                         break;
1557                 case SNDRV_PCM_STATE_RUNNING:
1558                         runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1559                         break;
1560                 case SNDRV_PCM_STATE_XRUN:
1561                         runtime->status->state = SNDRV_PCM_STATE_SETUP;
1562                         break;
1563                 default:
1564                         break;
1565                 }
1566         } else {
1567                 /* stop running stream */
1568                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1569                         int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1570                                 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1571                         snd_pcm_do_stop(substream, new_state);
1572                         snd_pcm_post_stop(substream, new_state);
1573                 }
1574         }
1575
1576         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
1577             runtime->trigger_master == substream &&
1578             (runtime->hw.info & SNDRV_PCM_INFO_DRAIN_TRIGGER))
1579                 return substream->ops->trigger(substream,
1580                                                SNDRV_PCM_TRIGGER_DRAIN);
1581
1582         return 0;
1583 }
1584
1585 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1586 {
1587 }
1588
1589 static struct action_ops snd_pcm_action_drain_init = {
1590         .pre_action = snd_pcm_pre_drain_init,
1591         .do_action = snd_pcm_do_drain_init,
1592         .post_action = snd_pcm_post_drain_init
1593 };
1594
1595 static int snd_pcm_drop(struct snd_pcm_substream *substream);
1596
1597 /*
1598  * Drain the stream(s).
1599  * When the substream is linked, sync until the draining of all playback streams
1600  * is finished.
1601  * After this call, all streams are supposed to be either SETUP or DRAINING
1602  * (capture only) state.
1603  */
1604 static int snd_pcm_drain(struct snd_pcm_substream *substream,
1605                          struct file *file)
1606 {
1607         struct snd_card *card;
1608         struct snd_pcm_runtime *runtime;
1609         struct snd_pcm_substream *s;
1610         wait_queue_t wait;
1611         int result = 0;
1612         int nonblock = 0;
1613
1614         card = substream->pcm->card;
1615         runtime = substream->runtime;
1616
1617         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1618                 return -EBADFD;
1619
1620         snd_power_lock(card);
1621         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1622                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1623                 if (result < 0) {
1624                         snd_power_unlock(card);
1625                         return result;
1626                 }
1627         }
1628
1629         if (file) {
1630                 if (file->f_flags & O_NONBLOCK)
1631                         nonblock = 1;
1632         } else if (substream->f_flags & O_NONBLOCK)
1633                 nonblock = 1;
1634
1635         down_read(&snd_pcm_link_rwsem);
1636         snd_pcm_stream_lock_irq(substream);
1637         /* resume pause */
1638         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1639                 snd_pcm_pause(substream, 0);
1640
1641         /* pre-start/stop - all running streams are changed to DRAINING state */
1642         result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1643         if (result < 0)
1644                 goto unlock;
1645         /* in non-blocking, we don't wait in ioctl but let caller poll */
1646         if (nonblock) {
1647                 result = -EAGAIN;
1648                 goto unlock;
1649         }
1650
1651         for (;;) {
1652                 long tout;
1653                 struct snd_pcm_runtime *to_check;
1654                 if (signal_pending(current)) {
1655                         result = -ERESTARTSYS;
1656                         break;
1657                 }
1658                 /* find a substream to drain */
1659                 to_check = NULL;
1660                 snd_pcm_group_for_each_entry(s, substream) {
1661                         if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1662                                 continue;
1663                         runtime = s->runtime;
1664                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1665                                 to_check = runtime;
1666                                 break;
1667                         }
1668                 }
1669                 if (!to_check)
1670                         break; /* all drained */
1671                 init_waitqueue_entry(&wait, current);
1672                 add_wait_queue(&to_check->sleep, &wait);
1673                 snd_pcm_stream_unlock_irq(substream);
1674                 up_read(&snd_pcm_link_rwsem);
1675                 snd_power_unlock(card);
1676                 if (runtime->no_period_wakeup)
1677                         tout = MAX_SCHEDULE_TIMEOUT;
1678                 else {
1679                         tout = 10;
1680                         if (runtime->rate) {
1681                                 long t = runtime->period_size * 2 / runtime->rate;
1682                                 tout = max(t, tout);
1683                         }
1684                         tout = msecs_to_jiffies(tout * 1000);
1685                 }
1686                 tout = schedule_timeout_interruptible(tout);
1687                 snd_power_lock(card);
1688                 down_read(&snd_pcm_link_rwsem);
1689                 snd_pcm_stream_lock_irq(substream);
1690                 remove_wait_queue(&to_check->sleep, &wait);
1691                 if (card->shutdown) {
1692                         result = -ENODEV;
1693                         break;
1694                 }
1695                 if (tout == 0) {
1696                         if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1697                                 result = -ESTRPIPE;
1698                         else {
1699                                 dev_dbg(substream->pcm->card->dev,
1700                                         "playback drain error (DMA or IRQ trouble?)\n");
1701                                 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1702                                 result = -EIO;
1703                         }
1704                         break;
1705                 }
1706         }
1707
1708  unlock:
1709         snd_pcm_stream_unlock_irq(substream);
1710         up_read(&snd_pcm_link_rwsem);
1711         snd_power_unlock(card);
1712
1713         return result;
1714 }
1715
1716 /*
1717  * drop ioctl
1718  *
1719  * Immediately put all linked substreams into SETUP state.
1720  */
1721 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1722 {
1723         struct snd_pcm_runtime *runtime;
1724         int result = 0;
1725
1726         if (PCM_RUNTIME_CHECK(substream))
1727                 return -ENXIO;
1728         runtime = substream->runtime;
1729
1730         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1731             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1732             runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1733                 return -EBADFD;
1734
1735         snd_pcm_stream_lock_irq(substream);
1736         /* resume pause */
1737         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1738                 snd_pcm_pause(substream, 0);
1739
1740         snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1741         /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1742         snd_pcm_stream_unlock_irq(substream);
1743
1744         return result;
1745 }
1746
1747
1748 static bool is_pcm_file(struct file *file)
1749 {
1750         struct inode *inode = file_inode(file);
1751         unsigned int minor;
1752
1753         if (!S_ISCHR(inode->i_mode) || imajor(inode) != snd_major)
1754                 return false;
1755         minor = iminor(inode);
1756         return snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) ||
1757                 snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE);
1758 }
1759
1760 /*
1761  * PCM link handling
1762  */
1763 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1764 {
1765         int res = 0;
1766         struct snd_pcm_file *pcm_file;
1767         struct snd_pcm_substream *substream1;
1768         struct snd_pcm_group *group;
1769         struct fd f = fdget(fd);
1770
1771         if (!f.file)
1772                 return -EBADFD;
1773         if (!is_pcm_file(f.file)) {
1774                 res = -EBADFD;
1775                 goto _badf;
1776         }
1777         pcm_file = f.file->private_data;
1778         substream1 = pcm_file->substream;
1779         group = kmalloc(sizeof(*group), GFP_KERNEL);
1780         if (!group) {
1781                 res = -ENOMEM;
1782                 goto _nolock;
1783         }
1784         down_write(&snd_pcm_link_rwsem);
1785         write_lock_irq(&snd_pcm_link_rwlock);
1786         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1787             substream->runtime->status->state != substream1->runtime->status->state ||
1788             substream->pcm->nonatomic != substream1->pcm->nonatomic) {
1789                 res = -EBADFD;
1790                 goto _end;
1791         }
1792         if (snd_pcm_stream_linked(substream1)) {
1793                 res = -EALREADY;
1794                 goto _end;
1795         }
1796         if (!snd_pcm_stream_linked(substream)) {
1797                 substream->group = group;
1798                 group = NULL;
1799                 spin_lock_init(&substream->group->lock);
1800                 mutex_init(&substream->group->mutex);
1801                 INIT_LIST_HEAD(&substream->group->substreams);
1802                 list_add_tail(&substream->link_list, &substream->group->substreams);
1803                 substream->group->count = 1;
1804         }
1805         list_add_tail(&substream1->link_list, &substream->group->substreams);
1806         substream->group->count++;
1807         substream1->group = substream->group;
1808  _end:
1809         write_unlock_irq(&snd_pcm_link_rwlock);
1810         up_write(&snd_pcm_link_rwsem);
1811  _nolock:
1812         snd_card_unref(substream1->pcm->card);
1813         kfree(group);
1814  _badf:
1815         fdput(f);
1816         return res;
1817 }
1818
1819 static void relink_to_local(struct snd_pcm_substream *substream)
1820 {
1821         substream->group = &substream->self_group;
1822         INIT_LIST_HEAD(&substream->self_group.substreams);
1823         list_add_tail(&substream->link_list, &substream->self_group.substreams);
1824 }
1825
1826 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1827 {
1828         struct snd_pcm_substream *s;
1829         int res = 0;
1830
1831         down_write(&snd_pcm_link_rwsem);
1832         write_lock_irq(&snd_pcm_link_rwlock);
1833         if (!snd_pcm_stream_linked(substream)) {
1834                 res = -EALREADY;
1835                 goto _end;
1836         }
1837         list_del(&substream->link_list);
1838         substream->group->count--;
1839         if (substream->group->count == 1) {     /* detach the last stream, too */
1840                 snd_pcm_group_for_each_entry(s, substream) {
1841                         relink_to_local(s);
1842                         break;
1843                 }
1844                 kfree(substream->group);
1845         }
1846         relink_to_local(substream);
1847        _end:
1848         write_unlock_irq(&snd_pcm_link_rwlock);
1849         up_write(&snd_pcm_link_rwsem);
1850         return res;
1851 }
1852
1853 /*
1854  * hw configurator
1855  */
1856 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1857                                struct snd_pcm_hw_rule *rule)
1858 {
1859         struct snd_interval t;
1860         snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1861                      hw_param_interval_c(params, rule->deps[1]), &t);
1862         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1863 }
1864
1865 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1866                                struct snd_pcm_hw_rule *rule)
1867 {
1868         struct snd_interval t;
1869         snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1870                      hw_param_interval_c(params, rule->deps[1]), &t);
1871         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1872 }
1873
1874 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1875                                    struct snd_pcm_hw_rule *rule)
1876 {
1877         struct snd_interval t;
1878         snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1879                          hw_param_interval_c(params, rule->deps[1]),
1880                          (unsigned long) rule->private, &t);
1881         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1882 }
1883
1884 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1885                                    struct snd_pcm_hw_rule *rule)
1886 {
1887         struct snd_interval t;
1888         snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1889                          (unsigned long) rule->private,
1890                          hw_param_interval_c(params, rule->deps[1]), &t);
1891         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1892 }
1893
1894 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1895                                   struct snd_pcm_hw_rule *rule)
1896 {
1897         unsigned int k;
1898         struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1899         struct snd_mask m;
1900         struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1901         snd_mask_any(&m);
1902         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1903                 int bits;
1904                 if (! snd_mask_test(mask, k))
1905                         continue;
1906                 bits = snd_pcm_format_physical_width(k);
1907                 if (bits <= 0)
1908                         continue; /* ignore invalid formats */
1909                 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1910                         snd_mask_reset(&m, k);
1911         }
1912         return snd_mask_refine(mask, &m);
1913 }
1914
1915 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1916                                        struct snd_pcm_hw_rule *rule)
1917 {
1918         struct snd_interval t;
1919         unsigned int k;
1920         t.min = UINT_MAX;
1921         t.max = 0;
1922         t.openmin = 0;
1923         t.openmax = 0;
1924         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1925                 int bits;
1926                 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1927                         continue;
1928                 bits = snd_pcm_format_physical_width(k);
1929                 if (bits <= 0)
1930                         continue; /* ignore invalid formats */
1931                 if (t.min > (unsigned)bits)
1932                         t.min = bits;
1933                 if (t.max < (unsigned)bits)
1934                         t.max = bits;
1935         }
1936         t.integer = 1;
1937         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1938 }
1939
1940 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1941 #error "Change this table"
1942 #endif
1943
1944 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1945                                  48000, 64000, 88200, 96000, 176400, 192000 };
1946
1947 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1948         .count = ARRAY_SIZE(rates),
1949         .list = rates,
1950 };
1951
1952 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1953                                 struct snd_pcm_hw_rule *rule)
1954 {
1955         struct snd_pcm_hardware *hw = rule->private;
1956         return snd_interval_list(hw_param_interval(params, rule->var),
1957                                  snd_pcm_known_rates.count,
1958                                  snd_pcm_known_rates.list, hw->rates);
1959 }
1960
1961 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1962                                             struct snd_pcm_hw_rule *rule)
1963 {
1964         struct snd_interval t;
1965         struct snd_pcm_substream *substream = rule->private;
1966         t.min = 0;
1967         t.max = substream->buffer_bytes_max;
1968         t.openmin = 0;
1969         t.openmax = 0;
1970         t.integer = 1;
1971         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1972 }
1973
1974 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1975 {
1976         struct snd_pcm_runtime *runtime = substream->runtime;
1977         struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1978         int k, err;
1979
1980         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1981                 snd_mask_any(constrs_mask(constrs, k));
1982         }
1983
1984         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1985                 snd_interval_any(constrs_interval(constrs, k));
1986         }
1987
1988         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1989         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1990         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1991         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1992         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1993
1994         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1995                                    snd_pcm_hw_rule_format, NULL,
1996                                    SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1997         if (err < 0)
1998                 return err;
1999         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
2000                                   snd_pcm_hw_rule_sample_bits, NULL,
2001                                   SNDRV_PCM_HW_PARAM_FORMAT,
2002                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2003         if (err < 0)
2004                 return err;
2005         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
2006                                   snd_pcm_hw_rule_div, NULL,
2007                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
2008         if (err < 0)
2009                 return err;
2010         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2011                                   snd_pcm_hw_rule_mul, NULL,
2012                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
2013         if (err < 0)
2014                 return err;
2015         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2016                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
2017                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
2018         if (err < 0)
2019                 return err;
2020         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
2021                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
2022                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
2023         if (err < 0)
2024                 return err;
2025         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
2026                                   snd_pcm_hw_rule_div, NULL,
2027                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
2028         if (err < 0)
2029                 return err;
2030         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2031                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2032                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
2033         if (err < 0)
2034                 return err;
2035         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2036                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2037                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
2038         if (err < 0)
2039                 return err;
2040         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
2041                                   snd_pcm_hw_rule_div, NULL,
2042                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
2043         if (err < 0)
2044                 return err;
2045         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2046                                   snd_pcm_hw_rule_div, NULL,
2047                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2048         if (err < 0)
2049                 return err;
2050         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2051                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
2052                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2053         if (err < 0)
2054                 return err;
2055         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
2056                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
2057                                   SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2058         if (err < 0)
2059                 return err;
2060         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2061                                   snd_pcm_hw_rule_mul, NULL,
2062                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
2063         if (err < 0)
2064                 return err;
2065         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2066                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
2067                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2068         if (err < 0)
2069                 return err;
2070         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
2071                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
2072                                   SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
2073         if (err < 0)
2074                 return err;
2075         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2076                                   snd_pcm_hw_rule_muldivk, (void*) 8,
2077                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2078         if (err < 0)
2079                 return err;
2080         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2081                                   snd_pcm_hw_rule_muldivk, (void*) 8,
2082                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
2083         if (err < 0)
2084                 return err;
2085         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
2086                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2087                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2088         if (err < 0)
2089                 return err;
2090         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
2091                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
2092                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
2093         if (err < 0)
2094                 return err;
2095         return 0;
2096 }
2097
2098 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
2099 {
2100         struct snd_pcm_runtime *runtime = substream->runtime;
2101         struct snd_pcm_hardware *hw = &runtime->hw;
2102         int err;
2103         unsigned int mask = 0;
2104
2105         if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
2106                 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
2107         if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
2108                 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
2109         if (hw_support_mmap(substream)) {
2110                 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
2111                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2112                 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
2113                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
2114                 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
2115                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
2116         }
2117         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
2118         if (err < 0)
2119                 return err;
2120
2121         err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
2122         if (err < 0)
2123                 return err;
2124
2125         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
2126         if (err < 0)
2127                 return err;
2128
2129         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
2130                                            hw->channels_min, hw->channels_max);
2131         if (err < 0)
2132                 return err;
2133
2134         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
2135                                            hw->rate_min, hw->rate_max);
2136         if (err < 0)
2137                 return err;
2138
2139         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
2140                                            hw->period_bytes_min, hw->period_bytes_max);
2141         if (err < 0)
2142                 return err;
2143
2144         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
2145                                            hw->periods_min, hw->periods_max);
2146         if (err < 0)
2147                 return err;
2148
2149         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2150                                            hw->period_bytes_min, hw->buffer_bytes_max);
2151         if (err < 0)
2152                 return err;
2153
2154         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2155                                   snd_pcm_hw_rule_buffer_bytes_max, substream,
2156                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
2157         if (err < 0)
2158                 return err;
2159
2160         /* FIXME: remove */
2161         if (runtime->dma_bytes) {
2162                 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
2163                 if (err < 0)
2164                         return err;
2165         }
2166
2167         if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
2168                 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2169                                           snd_pcm_hw_rule_rate, hw,
2170                                           SNDRV_PCM_HW_PARAM_RATE, -1);
2171                 if (err < 0)
2172                         return err;
2173         }
2174
2175         /* FIXME: this belong to lowlevel */
2176         snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2177
2178         return 0;
2179 }
2180
2181 static void pcm_release_private(struct snd_pcm_substream *substream)
2182 {
2183         snd_pcm_unlink(substream);
2184 }
2185
2186 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2187 {
2188         substream->ref_count--;
2189         if (substream->ref_count > 0)
2190                 return;
2191
2192         snd_pcm_drop(substream);
2193         if (substream->hw_opened) {
2194                 if (substream->ops->hw_free != NULL)
2195                         substream->ops->hw_free(substream);
2196                 substream->ops->close(substream);
2197                 substream->hw_opened = 0;
2198         }
2199         if (pm_qos_request_active(&substream->latency_pm_qos_req))
2200                 pm_qos_remove_request(&substream->latency_pm_qos_req);
2201         if (substream->pcm_release) {
2202                 substream->pcm_release(substream);
2203                 substream->pcm_release = NULL;
2204         }
2205         snd_pcm_detach_substream(substream);
2206 }
2207
2208 EXPORT_SYMBOL(snd_pcm_release_substream);
2209
2210 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2211                            struct file *file,
2212                            struct snd_pcm_substream **rsubstream)
2213 {
2214         struct snd_pcm_substream *substream;
2215         int err;
2216
2217         err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2218         if (err < 0)
2219                 return err;
2220         if (substream->ref_count > 1) {
2221                 *rsubstream = substream;
2222                 return 0;
2223         }
2224
2225         err = snd_pcm_hw_constraints_init(substream);
2226         if (err < 0) {
2227                 pcm_dbg(pcm, "snd_pcm_hw_constraints_init failed\n");
2228                 goto error;
2229         }
2230
2231         if ((err = substream->ops->open(substream)) < 0)
2232                 goto error;
2233
2234         substream->hw_opened = 1;
2235
2236         err = snd_pcm_hw_constraints_complete(substream);
2237         if (err < 0) {
2238                 pcm_dbg(pcm, "snd_pcm_hw_constraints_complete failed\n");
2239                 goto error;
2240         }
2241
2242         *rsubstream = substream;
2243         return 0;
2244
2245  error:
2246         snd_pcm_release_substream(substream);
2247         return err;
2248 }
2249
2250 EXPORT_SYMBOL(snd_pcm_open_substream);
2251
2252 static int snd_pcm_open_file(struct file *file,
2253                              struct snd_pcm *pcm,
2254                              int stream)
2255 {
2256         struct snd_pcm_file *pcm_file;
2257         struct snd_pcm_substream *substream;
2258         int err;
2259
2260         err = snd_pcm_open_substream(pcm, stream, file, &substream);
2261         if (err < 0)
2262                 return err;
2263
2264         pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2265         if (pcm_file == NULL) {
2266                 snd_pcm_release_substream(substream);
2267                 return -ENOMEM;
2268         }
2269         pcm_file->substream = substream;
2270         if (substream->ref_count == 1) {
2271                 substream->file = pcm_file;
2272                 substream->pcm_release = pcm_release_private;
2273         }
2274         file->private_data = pcm_file;
2275
2276         return 0;
2277 }
2278
2279 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2280 {
2281         struct snd_pcm *pcm;
2282         int err = nonseekable_open(inode, file);
2283         if (err < 0)
2284                 return err;
2285         pcm = snd_lookup_minor_data(iminor(inode),
2286                                     SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2287         err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2288         if (pcm)
2289                 snd_card_unref(pcm->card);
2290         return err;
2291 }
2292
2293 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2294 {
2295         struct snd_pcm *pcm;
2296         int err = nonseekable_open(inode, file);
2297         if (err < 0)
2298                 return err;
2299         pcm = snd_lookup_minor_data(iminor(inode),
2300                                     SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2301         err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2302         if (pcm)
2303                 snd_card_unref(pcm->card);
2304         return err;
2305 }
2306
2307 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2308 {
2309         int err;
2310         wait_queue_t wait;
2311
2312         if (pcm == NULL) {
2313                 err = -ENODEV;
2314                 goto __error1;
2315         }
2316         err = snd_card_file_add(pcm->card, file);
2317         if (err < 0)
2318                 goto __error1;
2319         if (!try_module_get(pcm->card->module)) {
2320                 err = -EFAULT;
2321                 goto __error2;
2322         }
2323         init_waitqueue_entry(&wait, current);
2324         add_wait_queue(&pcm->open_wait, &wait);
2325         mutex_lock(&pcm->open_mutex);
2326         while (1) {
2327                 err = snd_pcm_open_file(file, pcm, stream);
2328                 if (err >= 0)
2329                         break;
2330                 if (err == -EAGAIN) {
2331                         if (file->f_flags & O_NONBLOCK) {
2332                                 err = -EBUSY;
2333                                 break;
2334                         }
2335                 } else
2336                         break;
2337                 set_current_state(TASK_INTERRUPTIBLE);
2338                 mutex_unlock(&pcm->open_mutex);
2339                 schedule();
2340                 mutex_lock(&pcm->open_mutex);
2341                 if (pcm->card->shutdown) {
2342                         err = -ENODEV;
2343                         break;
2344                 }
2345                 if (signal_pending(current)) {
2346                         err = -ERESTARTSYS;
2347                         break;
2348                 }
2349         }
2350         remove_wait_queue(&pcm->open_wait, &wait);
2351         mutex_unlock(&pcm->open_mutex);
2352         if (err < 0)
2353                 goto __error;
2354         return err;
2355
2356       __error:
2357         module_put(pcm->card->module);
2358       __error2:
2359         snd_card_file_remove(pcm->card, file);
2360       __error1:
2361         return err;
2362 }
2363
2364 static int snd_pcm_release(struct inode *inode, struct file *file)
2365 {
2366         struct snd_pcm *pcm;
2367         struct snd_pcm_substream *substream;
2368         struct snd_pcm_file *pcm_file;
2369
2370         pcm_file = file->private_data;
2371         substream = pcm_file->substream;
2372         if (snd_BUG_ON(!substream))
2373                 return -ENXIO;
2374         pcm = substream->pcm;
2375         mutex_lock(&pcm->open_mutex);
2376         snd_pcm_release_substream(substream);
2377         kfree(pcm_file);
2378         mutex_unlock(&pcm->open_mutex);
2379         wake_up(&pcm->open_wait);
2380         module_put(pcm->card->module);
2381         snd_card_file_remove(pcm->card, file);
2382         return 0;
2383 }
2384
2385 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2386                                                  snd_pcm_uframes_t frames)
2387 {
2388         struct snd_pcm_runtime *runtime = substream->runtime;
2389         snd_pcm_sframes_t appl_ptr;
2390         snd_pcm_sframes_t ret;
2391         snd_pcm_sframes_t hw_avail;
2392
2393         if (frames == 0)
2394                 return 0;
2395
2396         snd_pcm_stream_lock_irq(substream);
2397         switch (runtime->status->state) {
2398         case SNDRV_PCM_STATE_PREPARED:
2399                 break;
2400         case SNDRV_PCM_STATE_DRAINING:
2401         case SNDRV_PCM_STATE_RUNNING:
2402                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2403                         break;
2404                 /* Fall through */
2405         case SNDRV_PCM_STATE_XRUN:
2406                 ret = -EPIPE;
2407                 goto __end;
2408         case SNDRV_PCM_STATE_SUSPENDED:
2409                 ret = -ESTRPIPE;
2410                 goto __end;
2411         default:
2412                 ret = -EBADFD;
2413                 goto __end;
2414         }
2415
2416         hw_avail = snd_pcm_playback_hw_avail(runtime);
2417         if (hw_avail <= 0) {
2418                 ret = 0;
2419                 goto __end;
2420         }
2421         if (frames > (snd_pcm_uframes_t)hw_avail)
2422                 frames = hw_avail;
2423         appl_ptr = runtime->control->appl_ptr - frames;
2424         if (appl_ptr < 0)
2425                 appl_ptr += runtime->boundary;
2426         runtime->control->appl_ptr = appl_ptr;
2427         ret = frames;
2428  __end:
2429         snd_pcm_stream_unlock_irq(substream);
2430         return ret;
2431 }
2432
2433 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2434                                                 snd_pcm_uframes_t frames)
2435 {
2436         struct snd_pcm_runtime *runtime = substream->runtime;
2437         snd_pcm_sframes_t appl_ptr;
2438         snd_pcm_sframes_t ret;
2439         snd_pcm_sframes_t hw_avail;
2440
2441         if (frames == 0)
2442                 return 0;
2443
2444         snd_pcm_stream_lock_irq(substream);
2445         switch (runtime->status->state) {
2446         case SNDRV_PCM_STATE_PREPARED:
2447         case SNDRV_PCM_STATE_DRAINING:
2448                 break;
2449         case SNDRV_PCM_STATE_RUNNING:
2450                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2451                         break;
2452                 /* Fall through */
2453         case SNDRV_PCM_STATE_XRUN:
2454                 ret = -EPIPE;
2455                 goto __end;
2456         case SNDRV_PCM_STATE_SUSPENDED:
2457                 ret = -ESTRPIPE;
2458                 goto __end;
2459         default:
2460                 ret = -EBADFD;
2461                 goto __end;
2462         }
2463
2464         hw_avail = snd_pcm_capture_hw_avail(runtime);
2465         if (hw_avail <= 0) {
2466                 ret = 0;
2467                 goto __end;
2468         }
2469         if (frames > (snd_pcm_uframes_t)hw_avail)
2470                 frames = hw_avail;
2471         appl_ptr = runtime->control->appl_ptr - frames;
2472         if (appl_ptr < 0)
2473                 appl_ptr += runtime->boundary;
2474         runtime->control->appl_ptr = appl_ptr;
2475         ret = frames;
2476  __end:
2477         snd_pcm_stream_unlock_irq(substream);
2478         return ret;
2479 }
2480
2481 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2482                                                   snd_pcm_uframes_t frames)
2483 {
2484         struct snd_pcm_runtime *runtime = substream->runtime;
2485         snd_pcm_sframes_t appl_ptr;
2486         snd_pcm_sframes_t ret;
2487         snd_pcm_sframes_t avail;
2488
2489         if (frames == 0)
2490                 return 0;
2491
2492         snd_pcm_stream_lock_irq(substream);
2493         switch (runtime->status->state) {
2494         case SNDRV_PCM_STATE_PREPARED:
2495         case SNDRV_PCM_STATE_PAUSED:
2496                 break;
2497         case SNDRV_PCM_STATE_DRAINING:
2498         case SNDRV_PCM_STATE_RUNNING:
2499                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2500                         break;
2501                 /* Fall through */
2502         case SNDRV_PCM_STATE_XRUN:
2503                 ret = -EPIPE;
2504                 goto __end;
2505         case SNDRV_PCM_STATE_SUSPENDED:
2506                 ret = -ESTRPIPE;
2507                 goto __end;
2508         default:
2509                 ret = -EBADFD;
2510                 goto __end;
2511         }
2512
2513         avail = snd_pcm_playback_avail(runtime);
2514         if (avail <= 0) {
2515                 ret = 0;
2516                 goto __end;
2517         }
2518         if (frames > (snd_pcm_uframes_t)avail)
2519                 frames = avail;
2520         appl_ptr = runtime->control->appl_ptr + frames;
2521         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2522                 appl_ptr -= runtime->boundary;
2523         runtime->control->appl_ptr = appl_ptr;
2524         ret = frames;
2525  __end:
2526         snd_pcm_stream_unlock_irq(substream);
2527         return ret;
2528 }
2529
2530 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2531                                                  snd_pcm_uframes_t frames)
2532 {
2533         struct snd_pcm_runtime *runtime = substream->runtime;
2534         snd_pcm_sframes_t appl_ptr;
2535         snd_pcm_sframes_t ret;
2536         snd_pcm_sframes_t avail;
2537
2538         if (frames == 0)
2539                 return 0;
2540
2541         snd_pcm_stream_lock_irq(substream);
2542         switch (runtime->status->state) {
2543         case SNDRV_PCM_STATE_PREPARED:
2544         case SNDRV_PCM_STATE_DRAINING:
2545         case SNDRV_PCM_STATE_PAUSED:
2546                 break;
2547         case SNDRV_PCM_STATE_RUNNING:
2548                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2549                         break;
2550                 /* Fall through */
2551         case SNDRV_PCM_STATE_XRUN:
2552                 ret = -EPIPE;
2553                 goto __end;
2554         case SNDRV_PCM_STATE_SUSPENDED:
2555                 ret = -ESTRPIPE;
2556                 goto __end;
2557         default:
2558                 ret = -EBADFD;
2559                 goto __end;
2560         }
2561
2562         avail = snd_pcm_capture_avail(runtime);
2563         if (avail <= 0) {
2564                 ret = 0;
2565                 goto __end;
2566         }
2567         if (frames > (snd_pcm_uframes_t)avail)
2568                 frames = avail;
2569         appl_ptr = runtime->control->appl_ptr + frames;
2570         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2571                 appl_ptr -= runtime->boundary;
2572         runtime->control->appl_ptr = appl_ptr;
2573         ret = frames;
2574  __end:
2575         snd_pcm_stream_unlock_irq(substream);
2576         return ret;
2577 }
2578
2579 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2580 {
2581         struct snd_pcm_runtime *runtime = substream->runtime;
2582         int err;
2583
2584         snd_pcm_stream_lock_irq(substream);
2585         switch (runtime->status->state) {
2586         case SNDRV_PCM_STATE_DRAINING:
2587                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2588                         goto __badfd;
2589                 /* Fall through */
2590         case SNDRV_PCM_STATE_RUNNING:
2591                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2592                         break;
2593                 /* Fall through */
2594         case SNDRV_PCM_STATE_PREPARED:
2595         case SNDRV_PCM_STATE_SUSPENDED:
2596                 err = 0;
2597                 break;
2598         case SNDRV_PCM_STATE_XRUN:
2599                 err = -EPIPE;
2600                 break;
2601         default:
2602               __badfd:
2603                 err = -EBADFD;
2604                 break;
2605         }
2606         snd_pcm_stream_unlock_irq(substream);
2607         return err;
2608 }
2609
2610 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2611                          snd_pcm_sframes_t __user *res)
2612 {
2613         struct snd_pcm_runtime *runtime = substream->runtime;
2614         int err;
2615         snd_pcm_sframes_t n = 0;
2616
2617         snd_pcm_stream_lock_irq(substream);
2618         switch (runtime->status->state) {
2619         case SNDRV_PCM_STATE_DRAINING:
2620                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2621                         goto __badfd;
2622                 /* Fall through */
2623         case SNDRV_PCM_STATE_RUNNING:
2624                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2625                         break;
2626                 /* Fall through */
2627         case SNDRV_PCM_STATE_PREPARED:
2628         case SNDRV_PCM_STATE_SUSPENDED:
2629                 err = 0;
2630                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2631                         n = snd_pcm_playback_hw_avail(runtime);
2632                 else
2633                         n = snd_pcm_capture_avail(runtime);
2634                 n += runtime->delay;
2635                 break;
2636         case SNDRV_PCM_STATE_XRUN:
2637                 err = -EPIPE;
2638                 break;
2639         default:
2640               __badfd:
2641                 err = -EBADFD;
2642                 break;
2643         }
2644         snd_pcm_stream_unlock_irq(substream);
2645         if (!err)
2646                 if (put_user(n, res))
2647                         err = -EFAULT;
2648         return err;
2649 }
2650
2651 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2652                             struct snd_pcm_sync_ptr __user *_sync_ptr)
2653 {
2654         struct snd_pcm_runtime *runtime = substream->runtime;
2655         struct snd_pcm_sync_ptr sync_ptr;
2656         volatile struct snd_pcm_mmap_status *status;
2657         volatile struct snd_pcm_mmap_control *control;
2658         int err;
2659
2660         memset(&sync_ptr, 0, sizeof(sync_ptr));
2661         if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2662                 return -EFAULT;
2663         if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2664                 return -EFAULT;
2665         status = runtime->status;
2666         control = runtime->control;
2667         if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2668                 err = snd_pcm_hwsync(substream);
2669                 if (err < 0)
2670                         return err;
2671         }
2672         snd_pcm_stream_lock_irq(substream);
2673         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2674                 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2675         else
2676                 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2677         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2678                 control->avail_min = sync_ptr.c.control.avail_min;
2679         else
2680                 sync_ptr.c.control.avail_min = control->avail_min;
2681         sync_ptr.s.status.state = status->state;
2682         sync_ptr.s.status.hw_ptr = status->hw_ptr;
2683         sync_ptr.s.status.tstamp = status->tstamp;
2684         sync_ptr.s.status.suspended_state = status->suspended_state;
2685         snd_pcm_stream_unlock_irq(substream);
2686         if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2687                 return -EFAULT;
2688         return 0;
2689 }
2690
2691 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2692 {
2693         struct snd_pcm_runtime *runtime = substream->runtime;
2694         int arg;
2695
2696         if (get_user(arg, _arg))
2697                 return -EFAULT;
2698         if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2699                 return -EINVAL;
2700         runtime->tstamp_type = arg;
2701         return 0;
2702 }
2703
2704 static int snd_pcm_common_ioctl1(struct file *file,
2705                                  struct snd_pcm_substream *substream,
2706                                  unsigned int cmd, void __user *arg)
2707 {
2708         switch (cmd) {
2709         case SNDRV_PCM_IOCTL_PVERSION:
2710                 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2711         case SNDRV_PCM_IOCTL_INFO:
2712                 return snd_pcm_info_user(substream, arg);
2713         case SNDRV_PCM_IOCTL_TSTAMP:    /* just for compatibility */
2714                 return 0;
2715         case SNDRV_PCM_IOCTL_TTSTAMP:
2716                 return snd_pcm_tstamp(substream, arg);
2717         case SNDRV_PCM_IOCTL_HW_REFINE:
2718                 return snd_pcm_hw_refine_user(substream, arg);
2719         case SNDRV_PCM_IOCTL_HW_PARAMS:
2720                 return snd_pcm_hw_params_user(substream, arg);
2721         case SNDRV_PCM_IOCTL_HW_FREE:
2722                 return snd_pcm_hw_free(substream);
2723         case SNDRV_PCM_IOCTL_SW_PARAMS:
2724                 return snd_pcm_sw_params_user(substream, arg);
2725         case SNDRV_PCM_IOCTL_STATUS:
2726                 return snd_pcm_status_user(substream, arg);
2727         case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2728                 return snd_pcm_channel_info_user(substream, arg);
2729         case SNDRV_PCM_IOCTL_PREPARE:
2730                 return snd_pcm_prepare(substream, file);
2731         case SNDRV_PCM_IOCTL_RESET:
2732                 return snd_pcm_reset(substream);
2733         case SNDRV_PCM_IOCTL_START:
2734                 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2735         case SNDRV_PCM_IOCTL_LINK:
2736                 return snd_pcm_link(substream, (int)(unsigned long) arg);
2737         case SNDRV_PCM_IOCTL_UNLINK:
2738                 return snd_pcm_unlink(substream);
2739         case SNDRV_PCM_IOCTL_RESUME:
2740                 return snd_pcm_resume(substream);
2741         case SNDRV_PCM_IOCTL_XRUN:
2742                 return snd_pcm_xrun(substream);
2743         case SNDRV_PCM_IOCTL_HWSYNC:
2744                 return snd_pcm_hwsync(substream);
2745         case SNDRV_PCM_IOCTL_DELAY:
2746                 return snd_pcm_delay(substream, arg);
2747         case SNDRV_PCM_IOCTL_SYNC_PTR:
2748                 return snd_pcm_sync_ptr(substream, arg);
2749 #ifdef CONFIG_SND_SUPPORT_OLD_API
2750         case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2751                 return snd_pcm_hw_refine_old_user(substream, arg);
2752         case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2753                 return snd_pcm_hw_params_old_user(substream, arg);
2754 #endif
2755         case SNDRV_PCM_IOCTL_DRAIN:
2756                 return snd_pcm_drain(substream, file);
2757         case SNDRV_PCM_IOCTL_DROP:
2758                 return snd_pcm_drop(substream);
2759         case SNDRV_PCM_IOCTL_PAUSE:
2760         {
2761                 int res;
2762                 snd_pcm_stream_lock_irq(substream);
2763                 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2764                 snd_pcm_stream_unlock_irq(substream);
2765                 return res;
2766         }
2767         }
2768         pcm_dbg(substream->pcm, "unknown ioctl = 0x%x\n", cmd);
2769         return -ENOTTY;
2770 }
2771
2772 static int snd_pcm_playback_ioctl1(struct file *file,
2773                                    struct snd_pcm_substream *substream,
2774                                    unsigned int cmd, void __user *arg)
2775 {
2776         if (snd_BUG_ON(!substream))
2777                 return -ENXIO;
2778         if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2779                 return -EINVAL;
2780         switch (cmd) {
2781         case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2782         {
2783                 struct snd_xferi xferi;
2784                 struct snd_xferi __user *_xferi = arg;
2785                 struct snd_pcm_runtime *runtime = substream->runtime;
2786                 snd_pcm_sframes_t result;
2787                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2788                         return -EBADFD;
2789                 if (put_user(0, &_xferi->result))
2790                         return -EFAULT;
2791                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2792                         return -EFAULT;
2793                 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2794                 __put_user(result, &_xferi->result);
2795                 return result < 0 ? result : 0;
2796         }
2797         case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2798         {
2799                 struct snd_xfern xfern;
2800                 struct snd_xfern __user *_xfern = arg;
2801                 struct snd_pcm_runtime *runtime = substream->runtime;
2802                 void __user **bufs;
2803                 snd_pcm_sframes_t result;
2804                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2805                         return -EBADFD;
2806                 if (runtime->channels > 128)
2807                         return -EINVAL;
2808                 if (put_user(0, &_xfern->result))
2809                         return -EFAULT;
2810                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2811                         return -EFAULT;
2812
2813                 bufs = memdup_user(xfern.bufs,
2814                                    sizeof(void *) * runtime->channels);
2815                 if (IS_ERR(bufs))
2816                         return PTR_ERR(bufs);
2817                 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2818                 kfree(bufs);
2819                 __put_user(result, &_xfern->result);
2820                 return result < 0 ? result : 0;
2821         }
2822         case SNDRV_PCM_IOCTL_REWIND:
2823         {
2824                 snd_pcm_uframes_t frames;
2825                 snd_pcm_uframes_t __user *_frames = arg;
2826                 snd_pcm_sframes_t result;
2827                 if (get_user(frames, _frames))
2828                         return -EFAULT;
2829                 if (put_user(0, _frames))
2830                         return -EFAULT;
2831                 result = snd_pcm_playback_rewind(substream, frames);
2832                 __put_user(result, _frames);
2833                 return result < 0 ? result : 0;
2834         }
2835         case SNDRV_PCM_IOCTL_FORWARD:
2836         {
2837                 snd_pcm_uframes_t frames;
2838                 snd_pcm_uframes_t __user *_frames = arg;
2839                 snd_pcm_sframes_t result;
2840                 if (get_user(frames, _frames))
2841                         return -EFAULT;
2842                 if (put_user(0, _frames))
2843                         return -EFAULT;
2844                 result = snd_pcm_playback_forward(substream, frames);
2845                 __put_user(result, _frames);
2846                 return result < 0 ? result : 0;
2847         }
2848         }
2849         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2850 }
2851
2852 static int snd_pcm_capture_ioctl1(struct file *file,
2853                                   struct snd_pcm_substream *substream,
2854                                   unsigned int cmd, void __user *arg)
2855 {
2856         if (snd_BUG_ON(!substream))
2857                 return -ENXIO;
2858         if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2859                 return -EINVAL;
2860         switch (cmd) {
2861         case SNDRV_PCM_IOCTL_READI_FRAMES:
2862         {
2863                 struct snd_xferi xferi;
2864                 struct snd_xferi __user *_xferi = arg;
2865                 struct snd_pcm_runtime *runtime = substream->runtime;
2866                 snd_pcm_sframes_t result;
2867                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2868                         return -EBADFD;
2869                 if (put_user(0, &_xferi->result))
2870                         return -EFAULT;
2871                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2872                         return -EFAULT;
2873                 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2874                 __put_user(result, &_xferi->result);
2875                 return result < 0 ? result : 0;
2876         }
2877         case SNDRV_PCM_IOCTL_READN_FRAMES:
2878         {
2879                 struct snd_xfern xfern;
2880                 struct snd_xfern __user *_xfern = arg;
2881                 struct snd_pcm_runtime *runtime = substream->runtime;
2882                 void *bufs;
2883                 snd_pcm_sframes_t result;
2884                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2885                         return -EBADFD;
2886                 if (runtime->channels > 128)
2887                         return -EINVAL;
2888                 if (put_user(0, &_xfern->result))
2889                         return -EFAULT;
2890                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2891                         return -EFAULT;
2892
2893                 bufs = memdup_user(xfern.bufs,
2894                                    sizeof(void *) * runtime->channels);
2895                 if (IS_ERR(bufs))
2896                         return PTR_ERR(bufs);
2897                 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2898                 kfree(bufs);
2899                 __put_user(result, &_xfern->result);
2900                 return result < 0 ? result : 0;
2901         }
2902         case SNDRV_PCM_IOCTL_REWIND:
2903         {
2904                 snd_pcm_uframes_t frames;
2905                 snd_pcm_uframes_t __user *_frames = arg;
2906                 snd_pcm_sframes_t result;
2907                 if (get_user(frames, _frames))
2908                         return -EFAULT;
2909                 if (put_user(0, _frames))
2910                         return -EFAULT;
2911                 result = snd_pcm_capture_rewind(substream, frames);
2912                 __put_user(result, _frames);
2913                 return result < 0 ? result : 0;
2914         }
2915         case SNDRV_PCM_IOCTL_FORWARD:
2916         {
2917                 snd_pcm_uframes_t frames;
2918                 snd_pcm_uframes_t __user *_frames = arg;
2919                 snd_pcm_sframes_t result;
2920                 if (get_user(frames, _frames))
2921                         return -EFAULT;
2922                 if (put_user(0, _frames))
2923                         return -EFAULT;
2924                 result = snd_pcm_capture_forward(substream, frames);
2925                 __put_user(result, _frames);
2926                 return result < 0 ? result : 0;
2927         }
2928         }
2929         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2930 }
2931
2932 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2933                                    unsigned long arg)
2934 {
2935         struct snd_pcm_file *pcm_file;
2936
2937         pcm_file = file->private_data;
2938
2939         if (((cmd >> 8) & 0xff) != 'A')
2940                 return -ENOTTY;
2941
2942         return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2943                                        (void __user *)arg);
2944 }
2945
2946 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2947                                   unsigned long arg)
2948 {
2949         struct snd_pcm_file *pcm_file;
2950
2951         pcm_file = file->private_data;
2952
2953         if (((cmd >> 8) & 0xff) != 'A')
2954                 return -ENOTTY;
2955
2956         return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2957                                       (void __user *)arg);
2958 }
2959
2960 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2961                          unsigned int cmd, void *arg)
2962 {
2963         mm_segment_t fs;
2964         int result;
2965
2966         fs = snd_enter_user();
2967         switch (substream->stream) {
2968         case SNDRV_PCM_STREAM_PLAYBACK:
2969                 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2970                                                  (void __user *)arg);
2971                 break;
2972         case SNDRV_PCM_STREAM_CAPTURE:
2973                 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2974                                                 (void __user *)arg);
2975                 break;
2976         default:
2977                 result = -EINVAL;
2978                 break;
2979         }
2980         snd_leave_user(fs);
2981         return result;
2982 }
2983
2984 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2985
2986 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2987                             loff_t * offset)
2988 {
2989         struct snd_pcm_file *pcm_file;
2990         struct snd_pcm_substream *substream;
2991         struct snd_pcm_runtime *runtime;
2992         snd_pcm_sframes_t result;
2993
2994         pcm_file = file->private_data;
2995         substream = pcm_file->substream;
2996         if (PCM_RUNTIME_CHECK(substream))
2997                 return -ENXIO;
2998         runtime = substream->runtime;
2999         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3000                 return -EBADFD;
3001         if (!frame_aligned(runtime, count))
3002                 return -EINVAL;
3003         count = bytes_to_frames(runtime, count);
3004         result = snd_pcm_lib_read(substream, buf, count);
3005         if (result > 0)
3006                 result = frames_to_bytes(runtime, result);
3007         return result;
3008 }
3009
3010 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
3011                              size_t count, loff_t * offset)
3012 {
3013         struct snd_pcm_file *pcm_file;
3014         struct snd_pcm_substream *substream;
3015         struct snd_pcm_runtime *runtime;
3016         snd_pcm_sframes_t result;
3017
3018         pcm_file = file->private_data;
3019         substream = pcm_file->substream;
3020         if (PCM_RUNTIME_CHECK(substream))
3021                 return -ENXIO;
3022         runtime = substream->runtime;
3023         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3024                 return -EBADFD;
3025         if (!frame_aligned(runtime, count))
3026                 return -EINVAL;
3027         count = bytes_to_frames(runtime, count);
3028         result = snd_pcm_lib_write(substream, buf, count);
3029         if (result > 0)
3030                 result = frames_to_bytes(runtime, result);
3031         return result;
3032 }
3033
3034 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
3035                              unsigned long nr_segs, loff_t pos)
3036
3037 {
3038         struct snd_pcm_file *pcm_file;
3039         struct snd_pcm_substream *substream;
3040         struct snd_pcm_runtime *runtime;
3041         snd_pcm_sframes_t result;
3042         unsigned long i;
3043         void __user **bufs;
3044         snd_pcm_uframes_t frames;
3045
3046         pcm_file = iocb->ki_filp->private_data;
3047         substream = pcm_file->substream;
3048         if (PCM_RUNTIME_CHECK(substream))
3049                 return -ENXIO;
3050         runtime = substream->runtime;
3051         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3052                 return -EBADFD;
3053         if (nr_segs > 1024 || nr_segs != runtime->channels)
3054                 return -EINVAL;
3055         if (!frame_aligned(runtime, iov->iov_len))
3056                 return -EINVAL;
3057         frames = bytes_to_samples(runtime, iov->iov_len);
3058         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
3059         if (bufs == NULL)
3060                 return -ENOMEM;
3061         for (i = 0; i < nr_segs; ++i)
3062                 bufs[i] = iov[i].iov_base;
3063         result = snd_pcm_lib_readv(substream, bufs, frames);
3064         if (result > 0)
3065                 result = frames_to_bytes(runtime, result);
3066         kfree(bufs);
3067         return result;
3068 }
3069
3070 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
3071                               unsigned long nr_segs, loff_t pos)
3072 {
3073         struct snd_pcm_file *pcm_file;
3074         struct snd_pcm_substream *substream;
3075         struct snd_pcm_runtime *runtime;
3076         snd_pcm_sframes_t result;
3077         unsigned long i;
3078         void __user **bufs;
3079         snd_pcm_uframes_t frames;
3080
3081         pcm_file = iocb->ki_filp->private_data;
3082         substream = pcm_file->substream;
3083         if (PCM_RUNTIME_CHECK(substream))
3084                 return -ENXIO;
3085         runtime = substream->runtime;
3086         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3087                 return -EBADFD;
3088         if (nr_segs > 128 || nr_segs != runtime->channels ||
3089             !frame_aligned(runtime, iov->iov_len))
3090                 return -EINVAL;
3091         frames = bytes_to_samples(runtime, iov->iov_len);
3092         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
3093         if (bufs == NULL)
3094                 return -ENOMEM;
3095         for (i = 0; i < nr_segs; ++i)
3096                 bufs[i] = iov[i].iov_base;
3097         result = snd_pcm_lib_writev(substream, bufs, frames);
3098         if (result > 0)
3099                 result = frames_to_bytes(runtime, result);
3100         kfree(bufs);
3101         return result;
3102 }
3103
3104 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
3105 {
3106         struct snd_pcm_file *pcm_file;
3107         struct snd_pcm_substream *substream;
3108         struct snd_pcm_runtime *runtime;
3109         unsigned int mask;
3110         snd_pcm_uframes_t avail;
3111
3112         pcm_file = file->private_data;
3113
3114         substream = pcm_file->substream;
3115         if (PCM_RUNTIME_CHECK(substream))
3116                 return -ENXIO;
3117         runtime = substream->runtime;
3118
3119         poll_wait(file, &runtime->sleep, wait);
3120
3121         snd_pcm_stream_lock_irq(substream);
3122         avail = snd_pcm_playback_avail(runtime);
3123         switch (runtime->status->state) {
3124         case SNDRV_PCM_STATE_RUNNING:
3125         case SNDRV_PCM_STATE_PREPARED:
3126         case SNDRV_PCM_STATE_PAUSED:
3127                 if (avail >= runtime->control->avail_min) {
3128                         mask = POLLOUT | POLLWRNORM;
3129                         break;
3130                 }
3131                 /* Fall through */
3132         case SNDRV_PCM_STATE_DRAINING:
3133                 mask = 0;
3134                 break;
3135         default:
3136                 mask = POLLOUT | POLLWRNORM | POLLERR;
3137                 break;
3138         }
3139         snd_pcm_stream_unlock_irq(substream);
3140         return mask;
3141 }
3142
3143 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
3144 {
3145         struct snd_pcm_file *pcm_file;
3146         struct snd_pcm_substream *substream;
3147         struct snd_pcm_runtime *runtime;
3148         unsigned int mask;
3149         snd_pcm_uframes_t avail;
3150
3151         pcm_file = file->private_data;
3152
3153         substream = pcm_file->substream;
3154         if (PCM_RUNTIME_CHECK(substream))
3155                 return -ENXIO;
3156         runtime = substream->runtime;
3157
3158         poll_wait(file, &runtime->sleep, wait);
3159
3160         snd_pcm_stream_lock_irq(substream);
3161         avail = snd_pcm_capture_avail(runtime);
3162         switch (runtime->status->state) {
3163         case SNDRV_PCM_STATE_RUNNING:
3164         case SNDRV_PCM_STATE_PREPARED:
3165         case SNDRV_PCM_STATE_PAUSED:
3166                 if (avail >= runtime->control->avail_min) {
3167                         mask = POLLIN | POLLRDNORM;
3168                         break;
3169                 }
3170                 mask = 0;
3171                 break;
3172         case SNDRV_PCM_STATE_DRAINING:
3173                 if (avail > 0) {
3174                         mask = POLLIN | POLLRDNORM;
3175                         break;
3176                 }
3177                 /* Fall through */
3178         default:
3179                 mask = POLLIN | POLLRDNORM | POLLERR;
3180                 break;
3181         }
3182         snd_pcm_stream_unlock_irq(substream);
3183         return mask;
3184 }
3185
3186 /*
3187  * mmap support
3188  */
3189
3190 /*
3191  * Only on coherent architectures, we can mmap the status and the control records
3192  * for effcient data transfer.  On others, we have to use HWSYNC ioctl...
3193  */
3194 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3195 /*
3196  * mmap status record
3197  */
3198 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
3199                                                 struct vm_fault *vmf)
3200 {
3201         struct snd_pcm_substream *substream = area->vm_private_data;
3202         struct snd_pcm_runtime *runtime;
3203
3204         if (substream == NULL)
3205                 return VM_FAULT_SIGBUS;
3206         runtime = substream->runtime;
3207         vmf->page = virt_to_page(runtime->status);
3208         get_page(vmf->page);
3209         return 0;
3210 }
3211
3212 static const struct vm_operations_struct snd_pcm_vm_ops_status =
3213 {
3214         .fault =        snd_pcm_mmap_status_fault,
3215 };
3216
3217 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3218                                struct vm_area_struct *area)
3219 {
3220         long size;
3221         if (!(area->vm_flags & VM_READ))
3222                 return -EINVAL;
3223         size = area->vm_end - area->vm_start;
3224         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3225                 return -EINVAL;
3226         area->vm_ops = &snd_pcm_vm_ops_status;
3227         area->vm_private_data = substream;
3228         area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3229         return 0;
3230 }
3231
3232 /*
3233  * mmap control record
3234  */
3235 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3236                                                 struct vm_fault *vmf)
3237 {
3238         struct snd_pcm_substream *substream = area->vm_private_data;
3239         struct snd_pcm_runtime *runtime;
3240
3241         if (substream == NULL)
3242                 return VM_FAULT_SIGBUS;
3243         runtime = substream->runtime;
3244         vmf->page = virt_to_page(runtime->control);
3245         get_page(vmf->page);
3246         return 0;
3247 }
3248
3249 static const struct vm_operations_struct snd_pcm_vm_ops_control =
3250 {
3251         .fault =        snd_pcm_mmap_control_fault,
3252 };
3253
3254 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3255                                 struct vm_area_struct *area)
3256 {
3257         long size;
3258         if (!(area->vm_flags & VM_READ))
3259                 return -EINVAL;
3260         size = area->vm_end - area->vm_start;
3261         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3262                 return -EINVAL;
3263         area->vm_ops = &snd_pcm_vm_ops_control;
3264         area->vm_private_data = substream;
3265         area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3266         return 0;
3267 }
3268 #else /* ! coherent mmap */
3269 /*
3270  * don't support mmap for status and control records.
3271  */
3272 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3273                                struct vm_area_struct *area)
3274 {
3275         return -ENXIO;
3276 }
3277 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3278                                 struct vm_area_struct *area)
3279 {
3280         return -ENXIO;
3281 }
3282 #endif /* coherent mmap */
3283
3284 static inline struct page *
3285 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3286 {
3287         void *vaddr = substream->runtime->dma_area + ofs;
3288         return virt_to_page(vaddr);
3289 }
3290
3291 /*
3292  * fault callback for mmapping a RAM page
3293  */
3294 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3295                                                 struct vm_fault *vmf)
3296 {
3297         struct snd_pcm_substream *substream = area->vm_private_data;
3298         struct snd_pcm_runtime *runtime;
3299         unsigned long offset;
3300         struct page * page;
3301         size_t dma_bytes;
3302
3303         if (substream == NULL)
3304                 return VM_FAULT_SIGBUS;
3305         runtime = substream->runtime;
3306         offset = vmf->pgoff << PAGE_SHIFT;
3307         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3308         if (offset > dma_bytes - PAGE_SIZE)
3309                 return VM_FAULT_SIGBUS;
3310         if (substream->ops->page)
3311                 page = substream->ops->page(substream, offset);
3312         else
3313                 page = snd_pcm_default_page_ops(substream, offset);
3314         if (!page)
3315                 return VM_FAULT_SIGBUS;
3316         get_page(page);
3317         vmf->page = page;
3318         return 0;
3319 }
3320
3321 static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3322         .open =         snd_pcm_mmap_data_open,
3323         .close =        snd_pcm_mmap_data_close,
3324 };
3325
3326 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
3327         .open =         snd_pcm_mmap_data_open,
3328         .close =        snd_pcm_mmap_data_close,
3329         .fault =        snd_pcm_mmap_data_fault,
3330 };
3331
3332 /*
3333  * mmap the DMA buffer on RAM
3334  */
3335
3336 /**
3337  * snd_pcm_lib_default_mmap - Default PCM data mmap function
3338  * @substream: PCM substream
3339  * @area: VMA
3340  *
3341  * This is the default mmap handler for PCM data.  When mmap pcm_ops is NULL,
3342  * this function is invoked implicitly.
3343  */
3344 int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
3345                              struct vm_area_struct *area)
3346 {
3347         area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3348 #ifdef CONFIG_GENERIC_ALLOCATOR
3349         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_IRAM) {
3350                 area->vm_page_prot = pgprot_writecombine(area->vm_page_prot);
3351                 return remap_pfn_range(area, area->vm_start,
3352                                 substream->dma_buffer.addr >> PAGE_SHIFT,
3353                                 area->vm_end - area->vm_start, area->vm_page_prot);
3354         }
3355 #endif /* CONFIG_GENERIC_ALLOCATOR */
3356 #ifndef CONFIG_X86 /* for avoiding warnings arch/x86/mm/pat.c */
3357         if (!substream->ops->page &&
3358             substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3359                 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3360                                          area,
3361                                          substream->runtime->dma_area,
3362                                          substream->runtime->dma_addr,
3363                                          area->vm_end - area->vm_start);
3364 #endif /* CONFIG_X86 */
3365         /* mmap with fault handler */
3366         area->vm_ops = &snd_pcm_vm_ops_data_fault;
3367         return 0;
3368 }
3369 EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
3370
3371 /*
3372  * mmap the DMA buffer on I/O memory area
3373  */
3374 #if SNDRV_PCM_INFO_MMAP_IOMEM
3375 /**
3376  * snd_pcm_lib_mmap_iomem - Default PCM data mmap function for I/O mem
3377  * @substream: PCM substream
3378  * @area: VMA
3379  *
3380  * When your hardware uses the iomapped pages as the hardware buffer and
3381  * wants to mmap it, pass this function as mmap pcm_ops.  Note that this
3382  * is supposed to work only on limited architectures.
3383  */
3384 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3385                            struct vm_area_struct *area)
3386 {
3387         struct snd_pcm_runtime *runtime = substream->runtime;;
3388
3389         area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3390         return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes);
3391 }
3392
3393 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3394 #endif /* SNDRV_PCM_INFO_MMAP */
3395
3396 /*
3397  * mmap DMA buffer
3398  */
3399 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3400                       struct vm_area_struct *area)
3401 {
3402         struct snd_pcm_runtime *runtime;
3403         long size;
3404         unsigned long offset;
3405         size_t dma_bytes;
3406         int err;
3407
3408         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3409                 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3410                         return -EINVAL;
3411         } else {
3412                 if (!(area->vm_flags & VM_READ))
3413                         return -EINVAL;
3414         }
3415         runtime = substream->runtime;
3416         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3417                 return -EBADFD;
3418         if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3419                 return -ENXIO;
3420         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3421             runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3422                 return -EINVAL;
3423         size = area->vm_end - area->vm_start;
3424         offset = area->vm_pgoff << PAGE_SHIFT;
3425         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3426         if ((size_t)size > dma_bytes)
3427                 return -EINVAL;
3428         if (offset > dma_bytes - size)
3429                 return -EINVAL;
3430
3431         area->vm_ops = &snd_pcm_vm_ops_data;
3432         area->vm_private_data = substream;
3433         if (substream->ops->mmap)
3434                 err = substream->ops->mmap(substream, area);
3435         else
3436                 err = snd_pcm_lib_default_mmap(substream, area);
3437         if (!err)
3438                 atomic_inc(&substream->mmap_count);
3439         return err;
3440 }
3441
3442 EXPORT_SYMBOL(snd_pcm_mmap_data);
3443
3444 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3445 {
3446         struct snd_pcm_file * pcm_file;
3447         struct snd_pcm_substream *substream;
3448         unsigned long offset;
3449
3450         pcm_file = file->private_data;
3451         substream = pcm_file->substream;
3452         if (PCM_RUNTIME_CHECK(substream))
3453                 return -ENXIO;
3454
3455         offset = area->vm_pgoff << PAGE_SHIFT;
3456         switch (offset) {
3457         case SNDRV_PCM_MMAP_OFFSET_STATUS:
3458                 if (pcm_file->no_compat_mmap)
3459                         return -ENXIO;
3460                 return snd_pcm_mmap_status(substream, file, area);
3461         case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3462                 if (pcm_file->no_compat_mmap)
3463                         return -ENXIO;
3464                 return snd_pcm_mmap_control(substream, file, area);
3465         default:
3466                 return snd_pcm_mmap_data(substream, file, area);
3467         }
3468         return 0;
3469 }
3470
3471 static int snd_pcm_fasync(int fd, struct file * file, int on)
3472 {
3473         struct snd_pcm_file * pcm_file;
3474         struct snd_pcm_substream *substream;
3475         struct snd_pcm_runtime *runtime;
3476
3477         pcm_file = file->private_data;
3478         substream = pcm_file->substream;
3479         if (PCM_RUNTIME_CHECK(substream))
3480                 return -ENXIO;
3481         runtime = substream->runtime;
3482         return fasync_helper(fd, file, on, &runtime->fasync);
3483 }
3484
3485 /*
3486  * ioctl32 compat
3487  */
3488 #ifdef CONFIG_COMPAT
3489 #include "pcm_compat.c"
3490 #else
3491 #define snd_pcm_ioctl_compat    NULL
3492 #endif
3493
3494 /*
3495  *  To be removed helpers to keep binary compatibility
3496  */
3497
3498 #ifdef CONFIG_SND_SUPPORT_OLD_API
3499 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3500 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3501
3502 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3503                                                struct snd_pcm_hw_params_old *oparams)
3504 {
3505         unsigned int i;
3506
3507         memset(params, 0, sizeof(*params));
3508         params->flags = oparams->flags;
3509         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3510                 params->masks[i].bits[0] = oparams->masks[i];
3511         memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3512         params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3513         params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3514         params->info = oparams->info;
3515         params->msbits = oparams->msbits;
3516         params->rate_num = oparams->rate_num;
3517         params->rate_den = oparams->rate_den;
3518         params->fifo_size = oparams->fifo_size;
3519 }
3520
3521 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3522                                              struct snd_pcm_hw_params *params)
3523 {
3524         unsigned int i;
3525
3526         memset(oparams, 0, sizeof(*oparams));
3527         oparams->flags = params->flags;
3528         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3529                 oparams->masks[i] = params->masks[i].bits[0];
3530         memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3531         oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3532         oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3533         oparams->info = params->info;
3534         oparams->msbits = params->msbits;
3535         oparams->rate_num = params->rate_num;
3536         oparams->rate_den = params->rate_den;
3537         oparams->fifo_size = params->fifo_size;
3538 }
3539
3540 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3541                                       struct snd_pcm_hw_params_old __user * _oparams)
3542 {
3543         struct snd_pcm_hw_params *params;
3544         struct snd_pcm_hw_params_old *oparams = NULL;
3545         int err;
3546
3547         params = kmalloc(sizeof(*params), GFP_KERNEL);
3548         if (!params)
3549                 return -ENOMEM;
3550
3551         oparams = memdup_user(_oparams, sizeof(*oparams));
3552         if (IS_ERR(oparams)) {
3553                 err = PTR_ERR(oparams);
3554                 goto out;
3555         }
3556         snd_pcm_hw_convert_from_old_params(params, oparams);
3557         err = snd_pcm_hw_refine(substream, params);
3558         snd_pcm_hw_convert_to_old_params(oparams, params);
3559         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3560                 if (!err)
3561                         err = -EFAULT;
3562         }
3563
3564         kfree(oparams);
3565 out:
3566         kfree(params);
3567         return err;
3568 }
3569
3570 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3571                                       struct snd_pcm_hw_params_old __user * _oparams)
3572 {
3573         struct snd_pcm_hw_params *params;
3574         struct snd_pcm_hw_params_old *oparams = NULL;
3575         int err;
3576
3577         params = kmalloc(sizeof(*params), GFP_KERNEL);
3578         if (!params)
3579                 return -ENOMEM;
3580
3581         oparams = memdup_user(_oparams, sizeof(*oparams));
3582         if (IS_ERR(oparams)) {
3583                 err = PTR_ERR(oparams);
3584                 goto out;
3585         }
3586         snd_pcm_hw_convert_from_old_params(params, oparams);
3587         err = snd_pcm_hw_params(substream, params);
3588         snd_pcm_hw_convert_to_old_params(oparams, params);
3589         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3590                 if (!err)
3591                         err = -EFAULT;
3592         }
3593
3594         kfree(oparams);
3595 out:
3596         kfree(params);
3597         return err;
3598 }
3599 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3600
3601 #ifndef CONFIG_MMU
3602 static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3603                                                unsigned long addr,
3604                                                unsigned long len,
3605                                                unsigned long pgoff,
3606                                                unsigned long flags)
3607 {
3608         struct snd_pcm_file *pcm_file = file->private_data;
3609         struct snd_pcm_substream *substream = pcm_file->substream;
3610         struct snd_pcm_runtime *runtime = substream->runtime;
3611         unsigned long offset = pgoff << PAGE_SHIFT;
3612
3613         switch (offset) {
3614         case SNDRV_PCM_MMAP_OFFSET_STATUS:
3615                 return (unsigned long)runtime->status;
3616         case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3617                 return (unsigned long)runtime->control;
3618         default:
3619                 return (unsigned long)runtime->dma_area + offset;
3620         }
3621 }
3622 #else
3623 # define snd_pcm_get_unmapped_area NULL
3624 #endif
3625
3626 /*
3627  *  Register section
3628  */
3629
3630 const struct file_operations snd_pcm_f_ops[2] = {
3631         {
3632                 .owner =                THIS_MODULE,
3633                 .write =                snd_pcm_write,
3634                 .aio_write =            snd_pcm_aio_write,
3635                 .open =                 snd_pcm_playback_open,
3636                 .release =              snd_pcm_release,
3637                 .llseek =               no_llseek,
3638                 .poll =                 snd_pcm_playback_poll,
3639                 .unlocked_ioctl =       snd_pcm_playback_ioctl,
3640                 .compat_ioctl =         snd_pcm_ioctl_compat,
3641                 .mmap =                 snd_pcm_mmap,
3642                 .fasync =               snd_pcm_fasync,
3643                 .get_unmapped_area =    snd_pcm_get_unmapped_area,
3644         },
3645         {
3646                 .owner =                THIS_MODULE,
3647                 .read =                 snd_pcm_read,
3648                 .aio_read =             snd_pcm_aio_read,
3649                 .open =                 snd_pcm_capture_open,
3650                 .release =              snd_pcm_release,
3651                 .llseek =               no_llseek,
3652                 .poll =                 snd_pcm_capture_poll,
3653                 .unlocked_ioctl =       snd_pcm_capture_ioctl,
3654                 .compat_ioctl =         snd_pcm_ioctl_compat,
3655                 .mmap =                 snd_pcm_mmap,
3656                 .fasync =               snd_pcm_fasync,
3657                 .get_unmapped_area =    snd_pcm_get_unmapped_area,
3658         }
3659 };